* [PATCH net-next-2.6 v5 11/12] net-caif: add CAIF documentation
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-11-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Documentation of the CAIF Protocol.
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
Documentation/networking/caif/Linux-CAIF.txt | 212 ++++++++++++++++++++++++++
Documentation/networking/caif/README | 110 +++++++++++++
2 files changed, 322 insertions(+), 0 deletions(-)
diff --git a/Documentation/networking/caif/Linux-CAIF.txt b/Documentation/networking/caif/Linux-CAIF.txt
new file mode 100644
index 0000000..7fe7a9a
--- /dev/null
+++ b/Documentation/networking/caif/Linux-CAIF.txt
@@ -0,0 +1,212 @@
+Linux CAIF
+===========
+copyright (C) ST-Ericsson AB 2010
+Author: Sjur Brendeland/ sjur.brandeland@stericsson.com
+License terms: GNU General Public License (GPL) version 2
+
+
+Introduction
+------------
+CAIF is a MUX protocol used by ST-Ericsson cellular modems for
+communication between Modem and host. The host processes can open virtual AT
+channels, initiate GPRS Data connections, Video channels and Utility Channels.
+The Utility Channels are general purpose pipes between modem and host.
+
+ST-Ericsson modems support a number of transports between modem
+and host. Currently, UART and Loopback are available for Linux.
+
+
+Architecture:
+------------
+The implementation of CAIF is divided into:
+* CAIF Socket Layer, Kernel API, and Net Device.
+* CAIF Core Protocol Implementation
+* CAIF Link Layer, implemented as NET devices.
+
+
+ RTNL
+ !
+ ! +------+ +------+ +------+
+ ! +------+! +------+! +------+!
+ ! ! Sock !! !Kernel!! ! Net !!
+ ! ! API !+ ! API !+ ! Dev !+ <- CAIF Client APIs
+ ! +------+ +------! +------+
+ ! ! ! !
+ ! +----------!----------+
+ ! +------+ <- CAIF Protocol Implementation
+ +-------> ! CAIF !
+ ! Core !
+ +------+
+ +--------!--------+
+ ! !
+ +------+ +-----+
+ ! ! ! TTY ! <- Link Layer (Net Devices)
+ +------+ +-----+
+
+
+Using the Kernel API
+----------------------
+The Kernel API is used for accessing CAIF channels from the
+kernel.
+The user of the API has to implement two callbacks for receive
+and control.
+The receive callback gives a CAIF packet as a SKB. The control
+callback will
+notify of channel initialization complete, and flow-on/flow-
+off.
+
+
+ struct caif_device caif_dev = {
+ .caif_config = {
+ .name = "MYDEV"
+ .type = CAIF_CHTY_AT
+ }
+ .receive_cb = my_receive,
+ .control_cb = my_control,
+ };
+ caif_add_device(&caif_dev);
+ caif_transmit(&caif_dev, skb);
+
+See the caif_kernel.h for details about the CAIF kernel API.
+
+
+I M P L E M E N T A T I O N
+===========================
+===========================
+
+CAIF Core Protocol Layer
+=========================================
+
+CAIF Core layer implements the CAIF protocol as defined by ST-Ericsson.
+It implements the CAIF protocol stack in a layered approach, where
+each layer described in the specification is implemented as a separate layer.
+The architecture is inspired by the design patterns "Protocol Layer" and
+"Protocol Packet".
+
+== CAIF structure ==
+The Core CAIF implementation contains:
+ - Simple implementation of CAIF.
+ - Layered architecture (a la Streams), each layer in the CAIF
+ specification is implemented in a separate c-file.
+ - Clients must implement PHY layer to access physical HW
+ with receive and transmit functions.
+ - Clients must call configuration function to add PHY layer.
+ - Clients must implement CAIF layer to consume/produce
+ CAIF payload with receive and transmit functions.
+ - Clients must call configuration function to add and connect the
+ Client layer.
+ - When receiving / transmitting CAIF Packets (cfpkt), ownership is passed
+ to the called function (except for framing layers' receive functions
+ or if a transmit function returns an error, in which case the caller
+ must free the packet).
+
+Layered Architecture
+--------------------
+The CAIF protocol can be divided into two parts: Support functions and Protocol
+Implementation. The support functions include:
+
+ - CFPKT CAIF Packet. Implementation of CAIF Protocol Packet. The
+ CAIF Packet has functions for creating, destroying and adding content
+ and for adding/extracting header and trailers to protocol packets.
+
+ - CFLST CAIF list implementation.
+
+ - CFGLUE CAIF Glue. Contains OS Specifics, such as memory
+ allocation, endianness, etc.
+
+The CAIF Protocol implementation contains:
+
+ - CFCNFG CAIF Configuration layer. Configures the CAIF Protocol
+ Stack and provides a Client interface for adding Link-Layer and
+ Driver interfaces on top of the CAIF Stack.
+
+ - CFCTRL CAIF Control layer. Encodes and Decodes control messages
+ such as enumeration and channel setup. Also matches request and
+ response messages.
+
+ - CFSERVL General CAIF Service Layer functionality; handles flow
+ control and remote shutdown requests.
+
+ - CFVEI CAIF VEI layer. Handles CAIF AT Channels on VEI (Virtual
+ External Interface). This layer encodes/decodes VEI frames.
+
+ - CFDGML CAIF Datagram layer. Handles CAIF Datagram layer (IP
+ traffic), encodes/decodes Datagram frames.
+
+ - CFMUX CAIF Mux layer. Handles multiplexing between multiple
+ physical bearers and multiple channels such as VEI, Datagram, etc.
+ The MUX keeps track of the existing CAIF Channels and
+ Physical Instances and selects the apropriate instance based
+ on Channel-Id and Physical-ID.
+
+ - CFFRML CAIF Framing layer. Handles Framing i.e. Frame length
+ and frame checksum.
+
+ - CFSERL CAIF Serial layer. Handles concatenation/split of frames
+ into CAIF Frames with correct length.
+
+
+
+ +---------+
+ | Config |
+ | CFCNFG |
+ +---------+
+ !
+ +---------+ +---------+ +---------+
+ | AT | | Control | | Datagram|
+ | CFVEIL | | CFCTRL | | CFDGML |
+ +---------+ +---------+ +---------+
+ \_____________!______________/
+ !
+ +---------+
+ | MUX |
+ | |
+ +---------+
+ _____!_____
+ / \
+ +---------+ +---------+
+ | CFFRML | | CFFRML |
+ | Framing | | Framing |
+ +---------+ +---------+
+ ! !
+ +---------+ +---------+
+ | | | Serial |
+ | | | CFSERL |
+ +---------+ +---------+
+
+
+In this layered approach the following "rules" apply.
+ - All layers embed the same structure "struct cflayer"
+ - A layer does not depend on any other layer's private data.
+ - Layers are stacked by setting the pointers
+ layer->up , layer->dn
+ - In order to send data upwards, each layer should do
+ layer->up->receive(layer->up, packet);
+ - In order to send data downwards, each layer should do
+ layer->dn->transmit(layer->dn, packet);
+
+
+Linux Driver Implementation
+===========================
+
+Linux GPRS Net Device and CAIF socket are implemented on top of the
+CAIF Core protocol. The Net device and CAIF socket have an instance of
+'struct cflayer', just like the CAIF Core protocol stack.
+Net device and Socket implement the 'receive()' function defined by
+'struct cflayer', just like the rest of the CAIF stack. In this way, transmit and
+receive of packets is handled as by the rest of the layers: the 'dn->transmit()'
+function is called in order to transmit data.
+
+The layer on top of the CAIF Core implementation is
+sometimes referred to as the "Client layer".
+
+
+Configuration of Link Layer
+---------------------------
+The Link Layer is implemented as Linux net devices (struct net_device).
+Payload handling and registration is done using standard Linux mechanisms.
+
+The CAIF Protocol relies on a loss-less link layer without implementing
+retransmission. This implies that packet drops must not happen.
+Therefore a flow-control mechanism is implemented where the physical
+interface can initiate flow stop for all CAIF Channels.
diff --git a/Documentation/networking/caif/README b/Documentation/networking/caif/README
new file mode 100644
index 0000000..f11cea3
--- /dev/null
+++ b/Documentation/networking/caif/README
@@ -0,0 +1,110 @@
+Copyright (C) ST-Ericsson AB 2010
+Author: Sjur Brendeland/ sjur.brandeland@stericsson.com
+License terms: GNU General Public License (GPL) version 2
+
+=== Start ===
+If you have compiled CAIF for modules do:
+
+$modprobe crc_ccitt
+$modprobe caif
+$modprobe caif_socket
+$modprobe chnl_net
+
+
+=== Preparing the setup with a STE modem ===
+
+If you are working on integration of CAIF you should make sure
+that the kernel is built with module support.
+
+There are some things that need to be tweaked to get the host TTY correctly
+set up to talk to the modem.
+Since the CAIF stack is running in the kernel and we want to use the existing
+TTY, we are installing our physical serial driver as a line discipline above
+the TTY device.
+
+To achieve this we need to install the N_CAIF ldisc from user space.
+The benefit is that we can hook up to any TTY.
+
+The use of Start-of-frame-extension (STX) must also be set as
+module parameter "ser_use_stx".
+
+Normally Frame Checksum is always used on UART, but this is also provided as a
+module parameter "ser_use_fcs".
+
+$ modprobe caif_serial ser_ttyname=/dev/ttyS0 ser_use_stx=yes
+$ ifconfig caif_ttyS0 up
+
+PLEASE NOTE: There is a limitation in Android shell.
+ It only accepts one argument to insmod/modprobe!
+
+=== Trouble shooting ===
+
+There are debugfs parameters provided for serial communication.
+/sys/kernel/debug/caif_serial/<tty-name>/
+
+* ser_state: Prints the bit-mask status where
+ - 0x02 means SENDING, this is a transient state.
+ - 0x04 means TX_COMPLETE, i.e. a frame has been sent by the tty
+ - 0x10 means FLOW_OFF_SENT, i.e. the previous frame has not been sent
+ and is blocking further send operation. Flow OFF has been propagated
+ to all CAIF Channels using this TTY.
+
+* tty_status: Prints the bit-mask tty status information
+ - 0x01 - tty->warned is on.
+ - 0x02 - tty->low_latency is on.
+ - 0x04 - tty->packed is on.
+ - 0x08 - tty->flow_stopped is on.
+ - 0x10 - tty->hw_stopped is on.
+ - 0x20 - tty->stopped is on.
+
+* last_tx_msg: Binary blob Prints the last transmitted frame.
+ This can be printed with
+ $od --format=x1 /sys/kernel/debug/caif_serial/<tty>/last_rx_msg.
+ The first two tx messages sent look like this. Note: The initial
+ byte 02 is start of frame extension (STX) used for re-syncing
+ upon errors.
+
+ - Enumeration:
+ 0000000 02 05 00 00 03 01 d2 02
+ | | | | | |
+ STX(1) | | | |
+ Length(2)| | |
+ Control Channel(1)
+ Command:Enumeration(1)
+ Link-ID(1)
+ Checksum(2)
+ - Channel Setup:
+ 0000000 02 07 00 00 00 21 a1 00 48 df
+ | | | | | | | |
+ STX(1) | | | | | |
+ Length(2)| | | | |
+ Control Channel(1)
+ Command:Channel Setup(1)
+ Channel Type(1)
+ Priority and Link-ID(1)
+ Endpoint(1)
+ Checksum(2)
+
+* last_rx_msg: Prints the last transmitted frame.
+ The RX messages for LinkSetup look almost identical but they have the
+ bit 0x20 set in the command bit, and Channel Setup has added one byte
+ before Checksum containing Channel ID.
+ NOTE: Several CAIF Messages might be concatenated. The maximum debug
+ buffer size is 128 bytes.
+
+== Error Scenarios:
+- last_tx_msg contains channel setup message and last_rx_msg is empty ->
+ The host seems to be able to send over the UART, at least the CAIF ldisc get
+ notified that sending is completed.
+
+- last_tx_msg contains enumeration message and last_rx_msg is empty ->
+ The host is not able to send the message from UART, the tty has not been
+ able to complete the transmit operation.
+
+- if /sys/kernel/debug/caif_serial/<tty>/tty_status is non-zero there
+ might be problems transmitting over UART.
+ E.g. host and modem wiring is not correct you will typically see
+ tty_status = 0x10 (hw_stopped) and ser_state = 0x10 (FLOW_OFF_SENT).
+ You will probably see the enumeration message in last_tx_message
+ and empty last_rx_message.
+
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 06/12] net-caif: add CAIF generic caif support functions
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-6-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Support functions for the caif protocol stack:
cfcnfg.c - CAIF Configuration Module used for
adding and removing drivers and connection
cfpkt_skbuff.c - CAIF Packet layer (SKB helper functions)
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
net/caif/cfcnfg.c | 529 +++++++++++++++++++++++++++++++++++++++++
net/caif/cfpkt_skbuff.c | 595 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 1124 insertions(+), 0 deletions(-)
diff --git a/net/caif/cfcnfg.c b/net/caif/cfcnfg.c
new file mode 100644
index 0000000..58b16b8
--- /dev/null
+++ b/net/caif/cfcnfg.c
@@ -0,0 +1,529 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfpkt.h>
+#include <net/caif/cfcnfg.h>
+#include <net/caif/cfctrl.h>
+#include <net/caif/cfmuxl.h>
+#include <net/caif/cffrml.h>
+#include <net/caif/cfserl.h>
+#include <net/caif/cfsrvl.h>
+
+#include <linux/module.h>
+#include <asm/atomic.h>
+
+#define MAX_PHY_LAYERS 7
+#define PHY_NAME_LEN 20
+
+#define container_obj(layr) container_of(layr, struct cfcnfg, layer)
+
+/* Information about CAIF physical interfaces held by Config Module in order
+ * to manage physical interfaces
+ */
+struct cfcnfg_phyinfo {
+ /* Pointer to the layer below the MUX (framing layer) */
+ struct cflayer *frm_layer;
+ /* Pointer to the lowest actual physical layer */
+ struct cflayer *phy_layer;
+ /* Unique identifier of the physical interface */
+ unsigned int id;
+ /* Preference of the physical in interface */
+ enum cfcnfg_phy_preference pref;
+
+ /* Reference count, number of channels using the device */
+ int phy_ref_count;
+
+ /* Information about the physical device */
+ struct dev_info dev_info;
+};
+
+struct cfcnfg {
+ struct cflayer layer;
+ struct cflayer *ctrl;
+ struct cflayer *mux;
+ u8 last_phyid;
+ struct cfcnfg_phyinfo phy_layers[MAX_PHY_LAYERS];
+};
+
+static void cncfg_linkup_rsp(struct cflayer *layer, u8 linkid,
+ enum cfctrl_srv serv, u8 phyid,
+ struct cflayer *adapt_layer);
+static void cncfg_linkdestroy_rsp(struct cflayer *layer, u8 linkid,
+ struct cflayer *client_layer);
+static void cncfg_reject_rsp(struct cflayer *layer, u8 linkid,
+ struct cflayer *adapt_layer);
+static void cfctrl_resp_func(void);
+static void cfctrl_enum_resp(void);
+
+struct cfcnfg *cfcnfg_create()
+{
+ struct cfcnfg *this;
+ struct cfctrl_rsp *resp;
+ /* Initiate this layer */
+ this = kmalloc(sizeof(struct cfcnfg), GFP_ATOMIC);
+ if (!this) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ memset(this, 0, sizeof(struct cfcnfg));
+ this->mux = cfmuxl_create();
+ if (!this->mux)
+ goto out_of_mem;
+ this->ctrl = cfctrl_create();
+ if (!this->ctrl)
+ goto out_of_mem;
+ /* Initiate response functions */
+ resp = cfctrl_get_respfuncs(this->ctrl);
+ resp->enum_rsp = cfctrl_enum_resp;
+ resp->linkerror_ind = cfctrl_resp_func;
+ resp->linkdestroy_rsp = cncfg_linkdestroy_rsp;
+ resp->sleep_rsp = cfctrl_resp_func;
+ resp->wake_rsp = cfctrl_resp_func;
+ resp->restart_rsp = cfctrl_resp_func;
+ resp->radioset_rsp = cfctrl_resp_func;
+ resp->linksetup_rsp = cncfg_linkup_rsp;
+ resp->reject_rsp = cncfg_reject_rsp;
+
+ this->last_phyid = 1;
+
+ cfmuxl_set_uplayer(this->mux, this->ctrl, 0);
+ layer_set_dn(this->ctrl, this->mux);
+ layer_set_up(this->ctrl, this);
+ return this;
+out_of_mem:
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ kfree(this->mux);
+ kfree(this->ctrl);
+ kfree(this);
+ return NULL;
+}
+EXPORT_SYMBOL(cfcnfg_create);
+
+void cfcnfg_remove(struct cfcnfg *cfg)
+{
+ if (cfg) {
+ kfree(cfg->mux);
+ kfree(cfg->ctrl);
+ kfree(cfg);
+ }
+}
+
+static void cfctrl_resp_func(void)
+{
+}
+
+static void cfctrl_enum_resp(void)
+{
+}
+
+struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg,
+ enum cfcnfg_phy_preference phy_pref)
+{
+ int i;
+
+ /* Try to match with specified preference */
+ for (i = 1; i < MAX_PHY_LAYERS; i++) {
+ if (cnfg->phy_layers[i].id == i &&
+ cnfg->phy_layers[i].pref == phy_pref &&
+ cnfg->phy_layers[i].frm_layer != NULL) {
+ caif_assert(cnfg->phy_layers != NULL);
+ caif_assert(cnfg->phy_layers[i].id == i);
+ return &cnfg->phy_layers[i].dev_info;
+ }
+ }
+ /* Otherwise just return something */
+ for (i = 1; i < MAX_PHY_LAYERS; i++) {
+ if (cnfg->phy_layers[i].id == i) {
+ caif_assert(cnfg->phy_layers != NULL);
+ caif_assert(cnfg->phy_layers[i].id == i);
+ return &cnfg->phy_layers[i].dev_info;
+ }
+ }
+
+ return NULL;
+}
+
+static struct cfcnfg_phyinfo *cfcnfg_get_phyinfo(struct cfcnfg *cnfg,
+ u8 phyid)
+{
+ int i;
+ /* Try to match with specified preference */
+ for (i = 0; i < MAX_PHY_LAYERS; i++)
+ if (cnfg->phy_layers[i].frm_layer != NULL &&
+ cnfg->phy_layers[i].id == phyid)
+ return &cnfg->phy_layers[i];
+ return 0;
+}
+
+int cfcnfg_get_named(struct cfcnfg *cnfg, char *name)
+{
+ int i;
+
+ /* Try to match with specified name */
+ for (i = 0; i < MAX_PHY_LAYERS; i++) {
+ if (cnfg->phy_layers[i].frm_layer != NULL
+ && strcmp(cnfg->phy_layers[i].phy_layer->name,
+ name) == 0)
+ return cnfg->phy_layers[i].frm_layer->id;
+ }
+ return 0;
+}
+
+/*
+ * NOTE: What happens on destroy failure:
+ * 1a) No response - Too early
+ * This will not happen because enumerate has already
+ * completed.
+ * 1b) No response - FATAL
+ * Not handled, but this should be a CAIF PROTOCOL ERROR
+ * Modem error, response is really expected - this
+ * case is not really handled.
+ * 2) O/E-bit indicate error
+ * Ignored - this link is destroyed anyway.
+ * 3) Not able to match on request
+ * Not handled, but this should be a CAIF PROTOCOL ERROR
+ * 4) Link-Error - (no response)
+ * Not handled, but this should be a CAIF PROTOCOL ERROR
+ */
+
+int cfcnfg_del_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer)
+{
+ u8 channel_id = 0;
+ int ret = 0;
+ struct cfcnfg_phyinfo *phyinfo = NULL;
+ u8 phyid = 0;
+
+ caif_assert(adap_layer != NULL);
+ channel_id = adap_layer->id;
+ if (channel_id == 0) {
+ pr_err("CAIF: %s():adap_layer->id is 0\n", __func__);
+ ret = -ENOTCONN;
+ goto end;
+ }
+
+ if (adap_layer->dn == NULL) {
+ pr_err("CAIF: %s():adap_layer->dn is NULL\n", __func__);
+ ret = -ENODEV;
+ goto end;
+ }
+
+ if (adap_layer->dn != NULL)
+ phyid = cfsrvl_getphyid(adap_layer->dn);
+
+ phyinfo = cfcnfg_get_phyinfo(cnfg, phyid);
+ if (phyinfo == NULL) {
+ pr_warning("CAIF: %s(): No interface to send disconnect to\n",
+ __func__);
+ ret = -ENODEV;
+ goto end;
+ }
+
+ if (phyinfo->id != phyid
+ || phyinfo->phy_layer->id != phyid
+ || phyinfo->frm_layer->id != phyid) {
+
+ pr_err("CAIF: %s(): Inconsistency in phy registration\n",
+ __func__);
+ ret = -EINVAL;
+ goto end;
+ }
+
+ ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
+
+end:
+ if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 &&
+ phyinfo->phy_layer != NULL &&
+ phyinfo->phy_layer->modemcmd != NULL) {
+ phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
+ _CAIF_MODEMCMD_PHYIF_USELESS);
+ }
+ return ret;
+
+}
+EXPORT_SYMBOL(cfcnfg_del_adapt_layer);
+
+static void cncfg_linkdestroy_rsp(struct cflayer *layer, u8 linkid,
+ struct cflayer *client_layer)
+{
+ struct cfcnfg *cnfg = container_obj(layer);
+ struct cflayer *servl;
+
+ /*
+ * 1) Remove service from the MUX layer. The MUX must
+ * guarante that no more payload sent "upwards" (receive)
+ */
+ servl = cfmuxl_remove_uplayer(cnfg->mux, linkid);
+
+ if (servl == NULL) {
+ pr_err("CAIF: %s(): PROTOCOL ERROR "
+ "- Error removing service_layer Linkid(%d)",
+ __func__, linkid);
+ return;
+ }
+ caif_assert(linkid == servl->id);
+
+ if (servl != client_layer && servl->up != client_layer) {
+ pr_err("CAIF: %s(): Error removing service_layer "
+ "Linkid(%d) %p %p",
+ __func__, linkid, (void *) servl,
+ (void *) client_layer);
+ return;
+ }
+
+ /*
+ * 2) DEINIT_RSP must guarantee that no more packets are transmitted
+ * from client (adap_layer) when it returns.
+ */
+
+ if (servl->ctrlcmd == NULL) {
+ pr_err("CAIF: %s(): Error servl->ctrlcmd == NULL", __func__);
+ return;
+ }
+
+ servl->ctrlcmd(servl, CAIF_CTRLCMD_DEINIT_RSP, 0);
+
+ /* 3) It is now safe to destroy the service layer. */
+ cfservl_destroy(servl);
+}
+
+/*
+ * NOTE: What happens on linksetup failure:
+ * 1a) No response - Too early
+ * This will not happen because enumerate is secured
+ * before using interface.
+ * 1b) No response - FATAL
+ * Not handled, but this should be a CAIF PROTOCOL ERROR
+ * Modem error, response is really expected - this case is
+ * not really handled.
+ * 2) O/E-bit indicate error
+ * Handled in cnfg_reject_rsp
+ * 3) Not able to match on request
+ * Not handled, but this should be a CAIF PROTOCOL ERROR
+ * 4) Link-Error - (no response)
+ * Not handled, but this should be a CAIF PROTOCOL ERROR
+ */
+
+int
+cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg,
+ struct cfctrl_link_param *param,
+ struct cflayer *adap_layer)
+{
+ struct cflayer *frml;
+ if (adap_layer == NULL) {
+ pr_err("CAIF: %s(): adap_layer is zero", __func__);
+ return -EINVAL;
+ }
+ if (adap_layer->receive == NULL) {
+ pr_err("CAIF: %s(): adap_layer->receive is NULL", __func__);
+ return -EINVAL;
+ }
+ if (adap_layer->ctrlcmd == NULL) {
+ pr_err("CAIF: %s(): adap_layer->ctrlcmd == NULL", __func__);
+ return -EINVAL;
+ }
+ frml = cnfg->phy_layers[param->phyid].frm_layer;
+ if (frml == NULL) {
+ pr_err("CAIF: %s(): Specified PHY type does not exist!",
+ __func__);
+ return -ENODEV;
+ }
+ caif_assert(param->phyid == cnfg->phy_layers[param->phyid].id);
+ caif_assert(cnfg->phy_layers[param->phyid].frm_layer->id ==
+ param->phyid);
+ caif_assert(cnfg->phy_layers[param->phyid].phy_layer->id ==
+ param->phyid);
+ /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */
+ cfctrl_enum_req(cnfg->ctrl, param->phyid);
+ cfctrl_linkup_request(cnfg->ctrl, param, adap_layer);
+ return 0;
+}
+EXPORT_SYMBOL(cfcnfg_add_adaptation_layer);
+
+static void cncfg_reject_rsp(struct cflayer *layer, u8 linkid,
+ struct cflayer *adapt_layer)
+{
+ if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL)
+ adapt_layer->ctrlcmd(adapt_layer,
+ CAIF_CTRLCMD_INIT_FAIL_RSP, 0);
+}
+
+static void
+cncfg_linkup_rsp(struct cflayer *layer, u8 linkid, enum cfctrl_srv serv,
+ u8 phyid, struct cflayer *adapt_layer)
+{
+ struct cfcnfg *cnfg = container_obj(layer);
+ struct cflayer *servicel = NULL;
+ struct cfcnfg_phyinfo *phyinfo;
+ if (adapt_layer == NULL) {
+ pr_err("CAIF: %s(): PROTOCOL ERROR "
+ "- LinkUp Request/Response did not match\n", __func__);
+ return;
+ }
+
+ caif_assert(cnfg != NULL);
+ caif_assert(phyid != 0);
+ phyinfo = &cnfg->phy_layers[phyid];
+ caif_assert(phyinfo != NULL);
+ caif_assert(phyinfo->id == phyid);
+ caif_assert(phyinfo->phy_layer != NULL);
+ caif_assert(phyinfo->phy_layer->id == phyid);
+
+ if (phyinfo != NULL &&
+ phyinfo->phy_ref_count++ == 0 &&
+ phyinfo->phy_layer != NULL &&
+ phyinfo->phy_layer->modemcmd != NULL) {
+ caif_assert(phyinfo->phy_layer->id == phyid);
+ phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
+ _CAIF_MODEMCMD_PHYIF_USEFULL);
+
+ }
+ adapt_layer->id = linkid;
+
+ switch (serv) {
+ case CFCTRL_SRV_VEI:
+ servicel = cfvei_create(linkid, &phyinfo->dev_info);
+ break;
+ case CFCTRL_SRV_DATAGRAM:
+ servicel = cfdgml_create(linkid, &phyinfo->dev_info);
+ break;
+ case CFCTRL_SRV_RFM:
+ servicel = cfrfml_create(linkid, &phyinfo->dev_info);
+ break;
+ case CFCTRL_SRV_UTIL:
+ servicel = cfutill_create(linkid, &phyinfo->dev_info);
+ break;
+ case CFCTRL_SRV_VIDEO:
+ servicel = cfvidl_create(linkid, &phyinfo->dev_info);
+ break;
+ case CFCTRL_SRV_DBG:
+ servicel = cfdbgl_create(linkid, &phyinfo->dev_info);
+ break;
+ default:
+ pr_err("CAIF: %s(): Protocol error. "
+ "Link setup response - unknown channel type\n",
+ __func__);
+ return;
+ }
+ if (!servicel) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ layer_set_dn(servicel, cnfg->mux);
+ cfmuxl_set_uplayer(cnfg->mux, servicel, linkid);
+ layer_set_up(servicel, adapt_layer);
+ layer_set_dn(adapt_layer, servicel);
+ servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0);
+}
+
+void
+cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
+ void *dev, struct cflayer *phy_layer, u16 *phyid,
+ enum cfcnfg_phy_preference pref,
+ bool fcs, bool stx)
+{
+ struct cflayer *frml;
+ struct cflayer *phy_driver = NULL;
+ int i;
+
+
+ if (cnfg->phy_layers[cnfg->last_phyid].frm_layer == NULL) {
+ *phyid = cnfg->last_phyid;
+
+ /* range: * 1..(MAX_PHY_LAYERS-1) */
+ cnfg->last_phyid =
+ (cnfg->last_phyid % (MAX_PHY_LAYERS - 1)) + 1;
+ } else {
+ *phyid = 0;
+ for (i = 1; i < MAX_PHY_LAYERS; i++) {
+ if (cnfg->phy_layers[i].frm_layer == NULL) {
+ *phyid = i;
+ break;
+ }
+ }
+ }
+ if (*phyid == 0) {
+ pr_err("CAIF: %s(): No Available PHY ID\n", __func__);
+ return;
+ }
+
+ switch (phy_type) {
+ case CFPHYTYPE_FRAG:
+ phy_driver =
+ cfserl_create(CFPHYTYPE_FRAG, *phyid, stx);
+ if (!phy_driver) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+
+ break;
+ case CFPHYTYPE_CAIF:
+ phy_driver = NULL;
+ break;
+ default:
+ pr_err("CAIF: %s(): %d", __func__, phy_type);
+ return;
+ break;
+ }
+
+ phy_layer->id = *phyid;
+ cnfg->phy_layers[*phyid].pref = pref;
+ cnfg->phy_layers[*phyid].id = *phyid;
+ cnfg->phy_layers[*phyid].dev_info.id = *phyid;
+ cnfg->phy_layers[*phyid].dev_info.dev = dev;
+ cnfg->phy_layers[*phyid].phy_layer = phy_layer;
+ cnfg->phy_layers[*phyid].phy_ref_count = 0;
+ phy_layer->type = phy_type;
+ frml = cffrml_create(*phyid, fcs);
+ if (!frml) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ cnfg->phy_layers[*phyid].frm_layer = frml;
+ cfmuxl_set_dnlayer(cnfg->mux, frml, *phyid);
+ layer_set_up(frml, cnfg->mux);
+
+ if (phy_driver != NULL) {
+ phy_driver->id = *phyid;
+ layer_set_dn(frml, phy_driver);
+ layer_set_up(phy_driver, frml);
+ layer_set_dn(phy_driver, phy_layer);
+ layer_set_up(phy_layer, phy_driver);
+ } else {
+ layer_set_dn(frml, phy_layer);
+ layer_set_up(phy_layer, frml);
+ }
+}
+EXPORT_SYMBOL(cfcnfg_add_phy_layer);
+
+int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer)
+{
+ struct cflayer *frml, *frml_dn;
+ u16 phyid;
+ phyid = phy_layer->id;
+ caif_assert(phyid == cnfg->phy_layers[phyid].id);
+ caif_assert(phy_layer == cnfg->phy_layers[phyid].phy_layer);
+ caif_assert(phy_layer->id == phyid);
+ caif_assert(cnfg->phy_layers[phyid].frm_layer->id == phyid);
+
+ memset(&cnfg->phy_layers[phy_layer->id], 0,
+ sizeof(struct cfcnfg_phyinfo));
+ frml = cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id);
+ frml_dn = frml->dn;
+ cffrml_set_uplayer(frml, NULL);
+ cffrml_set_dnlayer(frml, NULL);
+ cffrml_destroy(frml);
+
+ if (phy_layer != frml_dn) {
+ layer_set_up(frml_dn, NULL);
+ layer_set_dn(frml_dn, NULL);
+ kfree(frml_dn);
+ }
+ layer_set_up(phy_layer, NULL);
+ return 0;
+}
+EXPORT_SYMBOL(cfcnfg_del_phy_layer);
diff --git a/net/caif/cfpkt_skbuff.c b/net/caif/cfpkt_skbuff.c
new file mode 100644
index 0000000..fd05094
--- /dev/null
+++ b/net/caif/cfpkt_skbuff.c
@@ -0,0 +1,595 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/string.h>
+#include <linux/skbuff.h>
+#include <linux/hardirq.h>
+#include <net/caif/cfpkt.h>
+
+#define PKT_PREFIX CAIF_NEEDED_HEADROOM
+#define PKT_POSTFIX CAIF_NEEDED_TAILROOM
+#define PKT_LEN_WHEN_EXTENDING 128
+#define PKT_ERROR(pkt, errmsg) do { \
+ cfpkt_priv(pkt)->erronous = true; \
+ skb_reset_tail_pointer(&pkt->skb); \
+ pr_warning("CAIF: " errmsg);\
+ } while (0)
+
+struct cfpktq {
+ struct sk_buff_head head;
+ atomic_t count;
+ spinlock_t lock;
+};
+
+/*
+ * net/caif/ is generic and does not
+ * understand SKB, so we do this typecast
+ */
+struct cfpkt {
+ struct sk_buff skb;
+};
+
+/* Private data inside SKB */
+struct cfpkt_priv_data {
+ struct dev_info dev_info;
+ bool erronous;
+};
+
+inline struct cfpkt_priv_data *cfpkt_priv(struct cfpkt *pkt)
+{
+ return (struct cfpkt_priv_data *) pkt->skb.cb;
+}
+
+inline bool is_erronous(struct cfpkt *pkt)
+{
+ return cfpkt_priv(pkt)->erronous;
+}
+
+inline struct sk_buff *pkt_to_skb(struct cfpkt *pkt)
+{
+ return &pkt->skb;
+}
+
+inline struct cfpkt *skb_to_pkt(struct sk_buff *skb)
+{
+ return (struct cfpkt *) skb;
+}
+
+atomic_t cfpkt_packet_count;
+EXPORT_SYMBOL(cfpkt_packet_count);
+
+struct cfpkt *cfpkt_fromnative(enum caif_direction dir, void *nativepkt)
+{
+ struct cfpkt *pkt = skb_to_pkt(nativepkt);
+ cfpkt_priv(pkt)->erronous = false;
+ atomic_inc(&cfpkt_packet_count);
+ return pkt;
+}
+EXPORT_SYMBOL(cfpkt_fromnative);
+
+void *cfpkt_tonative(struct cfpkt *pkt)
+{
+ return (void *) pkt;
+}
+EXPORT_SYMBOL(cfpkt_tonative);
+
+struct cfpkt *cfpkt_create_pfx(u16 len, u16 pfx)
+{
+ struct sk_buff *skb;
+
+ if (likely(in_interrupt()))
+ skb = alloc_skb(len + pfx, GFP_ATOMIC);
+ else
+ skb = alloc_skb(len + pfx, GFP_KERNEL);
+
+ if (unlikely(skb == NULL))
+ return NULL;
+
+ skb_reserve(skb, pfx);
+ atomic_inc(&cfpkt_packet_count);
+ return skb_to_pkt(skb);
+}
+
+inline struct cfpkt *cfpkt_create(u16 len)
+{
+ return cfpkt_create_pfx(len + PKT_POSTFIX, PKT_PREFIX);
+}
+EXPORT_SYMBOL(cfpkt_create);
+
+void cfpkt_destroy(struct cfpkt *pkt)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ atomic_dec(&cfpkt_packet_count);
+ caif_assert(atomic_read(&cfpkt_packet_count) >= 0);
+ kfree_skb(skb);
+}
+EXPORT_SYMBOL(cfpkt_destroy);
+
+inline bool cfpkt_more(struct cfpkt *pkt)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ return skb->len > 0;
+}
+EXPORT_SYMBOL(cfpkt_more);
+
+int cfpkt_peek_head(struct cfpkt *pkt, void *data, u16 len)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ if (skb->tail - skb->data >= len) {
+ memcpy(data, skb->data, len);
+ return 0;
+ }
+ return !cfpkt_extr_head(pkt, data, len) &&
+ !cfpkt_add_head(pkt, data, len);
+}
+EXPORT_SYMBOL(cfpkt_peek_head);
+
+int cfpkt_extr_head(struct cfpkt *pkt, void *data, u16 len)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ u8 *from;
+ if (unlikely(is_erronous(pkt)))
+ return -EPROTO;
+
+ if (unlikely(len > skb->len)) {
+ PKT_ERROR(pkt, "cfpkt_extr_head read beyond end of packet\n");
+ return -EPROTO;
+ }
+
+ if (unlikely(len > skb_headlen(skb))) {
+ if (unlikely(skb_linearize(skb) != 0)) {
+ PKT_ERROR(pkt, "cfpkt_extr_head linearize failed\n");
+ return -EPROTO;
+ }
+ }
+ from = skb_pull(skb, len);
+ from -= len;
+ memcpy(data, from, len);
+ return 0;
+}
+EXPORT_SYMBOL(cfpkt_extr_head);
+
+int cfpkt_extr_trail(struct cfpkt *pkt, void *dta, u16 len)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ u8 *data = dta;
+ u8 *from;
+ if (unlikely(is_erronous(pkt)))
+ return -EPROTO;
+
+ if (unlikely(skb_linearize(skb) != 0)) {
+ PKT_ERROR(pkt, "cfpkt_extr_trail linearize failed\n");
+ return -EPROTO;
+ }
+ if (unlikely(skb->data + len > skb_tail_pointer(skb))) {
+ PKT_ERROR(pkt, "cfpkt_extr_trail read beyond end of packet\n");
+ return -EPROTO;
+ }
+ from = skb_tail_pointer(skb) - len;
+ skb_trim(skb, skb->len - len);
+ memcpy(data, from, len);
+ return 0;
+}
+EXPORT_SYMBOL(cfpkt_extr_trail);
+
+int cfpkt_pad_trail(struct cfpkt *pkt, u16 len)
+{
+ return cfpkt_add_body(pkt, NULL, len);
+}
+EXPORT_SYMBOL(cfpkt_pad_trail);
+
+int cfpkt_add_body(struct cfpkt *pkt, const void *data, u16 len)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ struct sk_buff *lastskb;
+ u8 *to;
+ u16 addlen = 0;
+
+
+ if (unlikely(is_erronous(pkt)))
+ return -EPROTO;
+
+ lastskb = skb;
+
+ /* Check whether we need to add space at the tail */
+ if (unlikely(skb_tailroom(skb) < len)) {
+ if (likely(len < PKT_LEN_WHEN_EXTENDING))
+ addlen = PKT_LEN_WHEN_EXTENDING;
+ else
+ addlen = len;
+ }
+
+ /* Check whether we need to change the SKB before writing to the tail */
+ if (unlikely((addlen > 0) || skb_cloned(skb) || skb_shared(skb))) {
+
+ /* Make sure data is writable */
+ if (unlikely(skb_cow_data(skb, addlen, &lastskb) < 0)) {
+ PKT_ERROR(pkt, "cfpkt_add_body: cow failed\n");
+ return -EPROTO;
+ }
+ /*
+ * Is the SKB non-linear after skb_cow_data()? If so, we are
+ * going to add data to the last SKB, so we need to adjust
+ * lengths of the top SKB.
+ */
+ if (lastskb != skb) {
+ pr_warning("CAIF: %s(): Packet is non-linear\n",
+ __func__);
+ skb->len += len;
+ skb->data_len += len;
+ }
+ }
+
+ /* All set to put the last SKB and optionally write data there. */
+ to = skb_put(lastskb, len);
+ if (likely(data))
+ memcpy(to, data, len);
+ return 0;
+}
+EXPORT_SYMBOL(cfpkt_add_body);
+
+inline int cfpkt_addbdy(struct cfpkt *pkt, u8 data)
+{
+ return cfpkt_add_body(pkt, &data, 1);
+}
+EXPORT_SYMBOL(cfpkt_addbdy);
+
+int cfpkt_add_head(struct cfpkt *pkt, const void *data2, u16 len)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ struct sk_buff *lastskb;
+ u8 *to;
+ const u8 *data = data2;
+ if (unlikely(is_erronous(pkt)))
+ return -EPROTO;
+ if (unlikely(skb_headroom(skb) < len)) {
+ PKT_ERROR(pkt, "cfpkt_add_head: no headroom\n");
+ return -EPROTO;
+ }
+
+ /* Make sure data is writable */
+ if (unlikely(skb_cow_data(skb, 0, &lastskb) < 0)) {
+ PKT_ERROR(pkt, "cfpkt_add_head: cow failed\n");
+ return -EPROTO;
+ }
+
+ to = skb_push(skb, len);
+ memcpy(to, data, len);
+ return 0;
+}
+EXPORT_SYMBOL(cfpkt_add_head);
+
+inline int cfpkt_add_trail(struct cfpkt *pkt, const void *data, u16 len)
+{
+ return cfpkt_add_body(pkt, data, len);
+}
+EXPORT_SYMBOL(cfpkt_add_trail);
+
+inline u16 cfpkt_getlen(struct cfpkt *pkt)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ return skb->len;
+}
+EXPORT_SYMBOL(cfpkt_getlen);
+
+inline u16 cfpkt_iterate(struct cfpkt *pkt,
+ u16 (*iter_func)(u16, void *, __u16),
+ u16 data)
+{
+ /*
+ * Don't care about the performance hit of linearizing,
+ * Checksum should not be used on high-speed interfaces anyway.
+ */
+ if (unlikely(is_erronous(pkt)))
+ return -EPROTO;
+ if (unlikely(skb_linearize(&pkt->skb) != 0)) {
+ PKT_ERROR(pkt, "cfpkt_iterate: linearize failed\n");
+ return -EPROTO;
+ }
+ return iter_func(data, pkt->skb.data, cfpkt_getlen(pkt));
+}
+EXPORT_SYMBOL(cfpkt_iterate);
+
+int cfpkt_setlen(struct cfpkt *pkt, u16 len)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+
+
+ if (unlikely(is_erronous(pkt)))
+ return -EPROTO;
+
+ if (likely(len <= skb->len)) {
+ if (unlikely(skb->data_len))
+ ___pskb_trim(skb, len);
+ else
+ skb_trim(skb, len);
+
+ return cfpkt_getlen(pkt);
+ }
+
+ /* Need to expand SKB */
+ if (unlikely(!cfpkt_pad_trail(pkt, len - skb->len)))
+ PKT_ERROR(pkt, "cfpkt_setlen: skb_pad_trail failed\n");
+
+ return cfpkt_getlen(pkt);
+}
+EXPORT_SYMBOL(cfpkt_setlen);
+
+struct cfpkt *cfpkt_create_uplink(const unsigned char *data, unsigned int len)
+{
+ struct cfpkt *pkt = cfpkt_create_pfx(len + PKT_POSTFIX, PKT_PREFIX);
+ if (unlikely(data != NULL))
+ cfpkt_add_body(pkt, data, len);
+ return pkt;
+}
+EXPORT_SYMBOL(cfpkt_create_uplink);
+
+
+struct cfpkt *cfpkt_append(struct cfpkt *dstpkt,
+ struct cfpkt *addpkt,
+ u16 expectlen)
+{
+ struct sk_buff *dst = pkt_to_skb(dstpkt);
+ struct sk_buff *add = pkt_to_skb(addpkt);
+ u16 addlen = add->tail - add->data;
+ u16 neededtailspace;
+ struct sk_buff *tmp;
+ u16 dstlen;
+ u16 createlen;
+ if (unlikely(is_erronous(dstpkt) || is_erronous(addpkt))) {
+ cfpkt_destroy(addpkt);
+ return dstpkt;
+ }
+ if (expectlen > addlen)
+ neededtailspace = expectlen;
+ else
+ neededtailspace = addlen;
+
+ if (dst->tail + neededtailspace > dst->end) {
+ /* Create a dumplicate of 'dst' with more tail space */
+ dstlen = dst->tail - dst->data;
+ createlen = dstlen + neededtailspace;
+ tmp = pkt_to_skb(
+ cfpkt_create(createlen + PKT_PREFIX + PKT_POSTFIX));
+ if (!tmp)
+ return NULL;
+ tmp->tail = tmp->data + dstlen;
+ tmp->len = dstlen;
+ memcpy(tmp->data, dst->data, dstlen);
+ cfpkt_destroy(dstpkt);
+ dst = tmp;
+ }
+ memcpy(dst->tail, add->data, add->tail - add->data);
+ cfpkt_destroy(addpkt);
+ dst->tail += addlen;
+ dst->len += addlen;
+ return skb_to_pkt(dst);
+}
+EXPORT_SYMBOL(cfpkt_append);
+
+struct cfpkt *cfpkt_split(struct cfpkt *pkt, u16 pos)
+{
+ struct sk_buff *skb2;
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ u8 *split = skb->data + pos;
+ u16 len2nd = skb->tail - split;
+
+ if (unlikely(is_erronous(pkt)))
+ return NULL;
+
+ if (skb->data + pos > skb->tail) {
+ PKT_ERROR(pkt,
+ "cfpkt_split: trying to split beyond end of packet");
+ return NULL;
+ }
+
+ /* Create a new packet for the second part of the data */
+ skb2 = pkt_to_skb(
+ cfpkt_create_pfx(len2nd + PKT_PREFIX + PKT_POSTFIX,
+ PKT_PREFIX));
+
+ if (skb2 == NULL)
+ return NULL;
+
+ /* Reduce the length of the original packet */
+ skb->tail = split;
+ skb->len = pos;
+
+ memcpy(skb2->data, split, len2nd);
+ skb2->tail += len2nd;
+ skb2->len += len2nd;
+ return skb_to_pkt(skb2);
+}
+EXPORT_SYMBOL(cfpkt_split);
+
+
+char *cfpkt_log_pkt(struct cfpkt *pkt, char *buf, int buflen)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ char *p = buf;
+ int i;
+
+ /*
+ * Sanity check buffer length, it needs to be at least as large as
+ * the header info: ~=50+ bytes
+ */
+ if (buflen < 50)
+ return NULL;
+
+ snprintf(buf, buflen, "%s: pkt:%p len:%d(%d+%d) {%d,%d} data: [",
+ is_erronous(pkt) ? "ERRONOUS-SKB" :
+ (skb->data_len != 0 ? "COMPLEX-SKB" : "SKB"),
+ skb,
+ skb->len,
+ skb->tail - skb->data,
+ skb->data_len,
+ skb->data - skb->head, skb->tail - skb->head);
+ p = buf + strlen(buf);
+
+ for (i = 0; i < skb->tail - skb->data && i < 300; i++) {
+ if (p > buf + buflen - 10) {
+ sprintf(p, "...");
+ p = buf + strlen(buf);
+ break;
+ }
+ sprintf(p, "%02x,", skb->data[i]);
+ p = buf + strlen(buf);
+ }
+ sprintf(p, "]\n");
+ return buf;
+}
+EXPORT_SYMBOL(cfpkt_log_pkt);
+
+int cfpkt_raw_append(struct cfpkt *pkt, void **buf, unsigned int buflen)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+ struct sk_buff *lastskb;
+
+ caif_assert(buf != NULL);
+ if (unlikely(is_erronous(pkt)))
+ return -EPROTO;
+ /* Make sure SKB is writable */
+ if (unlikely(skb_cow_data(skb, 0, &lastskb) < 0)) {
+ PKT_ERROR(pkt, "cfpkt_raw_append: skb_cow_data failed\n");
+ return -EPROTO;
+ }
+
+ if (unlikely(skb_linearize(skb) != 0)) {
+ PKT_ERROR(pkt, "cfpkt_raw_append: linearize failed\n");
+ return -EPROTO;
+ }
+
+ if (unlikely(skb_tailroom(skb) < buflen)) {
+ PKT_ERROR(pkt, "cfpkt_raw_append: buffer too short - failed\n");
+ return -EPROTO;
+ }
+
+ *buf = skb_put(skb, buflen);
+ return 1;
+}
+EXPORT_SYMBOL(cfpkt_raw_append);
+
+int cfpkt_raw_extract(struct cfpkt *pkt, void **buf, unsigned int buflen)
+{
+ struct sk_buff *skb = pkt_to_skb(pkt);
+
+ caif_assert(buf != NULL);
+ if (unlikely(is_erronous(pkt)))
+ return -EPROTO;
+
+ if (unlikely(buflen > skb->len)) {
+ PKT_ERROR(pkt, "cfpkt_raw_extract: buflen too large "
+ "- failed\n");
+ return -EPROTO;
+ }
+
+ if (unlikely(buflen > skb_headlen(skb))) {
+ if (unlikely(skb_linearize(skb) != 0)) {
+ PKT_ERROR(pkt, "cfpkt_raw_extract: linearize failed\n");
+ return -EPROTO;
+ }
+ }
+
+ *buf = skb->data;
+ skb_pull(skb, buflen);
+
+ return 1;
+}
+EXPORT_SYMBOL(cfpkt_raw_extract);
+
+inline bool cfpkt_erroneous(struct cfpkt *pkt)
+{
+ return cfpkt_priv(pkt)->erronous;
+}
+EXPORT_SYMBOL(cfpkt_erroneous);
+
+struct cfpkt *cfpkt_create_pkt(enum caif_direction dir,
+ const unsigned char *data, unsigned int len)
+{
+ struct cfpkt *pkt;
+ if (dir == CAIF_DIR_OUT)
+ pkt = cfpkt_create_pfx(len + PKT_POSTFIX, PKT_PREFIX);
+ else
+ pkt = cfpkt_create_pfx(len, 0);
+ if (unlikely(!pkt))
+ return NULL;
+ if (unlikely(data))
+ cfpkt_add_body(pkt, data, len);
+ cfpkt_priv(pkt)->erronous = false;
+ return pkt;
+}
+EXPORT_SYMBOL(cfpkt_create_pkt);
+
+struct cfpktq *cfpktq_create()
+{
+ struct cfpktq *q = kmalloc(sizeof(struct cfpktq), GFP_ATOMIC);
+ if (!q)
+ return NULL;
+ skb_queue_head_init(&q->head);
+ atomic_set(&q->count, 0);
+ spin_lock_init(&q->lock);
+ return q;
+}
+EXPORT_SYMBOL(cfpktq_create);
+
+void cfpkt_queue(struct cfpktq *pktq, struct cfpkt *pkt, unsigned short prio)
+{
+ atomic_inc(&pktq->count);
+ spin_lock(&pktq->lock);
+ skb_queue_tail(&pktq->head, pkt_to_skb(pkt));
+ spin_unlock(&pktq->lock);
+
+}
+EXPORT_SYMBOL(cfpkt_queue);
+
+struct cfpkt *cfpkt_qpeek(struct cfpktq *pktq)
+{
+ struct cfpkt *tmp;
+ spin_lock(&pktq->lock);
+ tmp = skb_to_pkt(skb_peek(&pktq->head));
+ spin_unlock(&pktq->lock);
+ return tmp;
+}
+EXPORT_SYMBOL(cfpkt_qpeek);
+
+struct cfpkt *cfpkt_dequeue(struct cfpktq *pktq)
+{
+ struct cfpkt *pkt;
+ spin_lock(&pktq->lock);
+ pkt = skb_to_pkt(skb_dequeue(&pktq->head));
+ if (pkt) {
+ atomic_dec(&pktq->count);
+ caif_assert(atomic_read(&pktq->count) >= 0);
+ }
+ spin_unlock(&pktq->lock);
+ return pkt;
+}
+EXPORT_SYMBOL(cfpkt_dequeue);
+
+int cfpkt_qcount(struct cfpktq *pktq)
+{
+ return atomic_read(&pktq->count);
+}
+EXPORT_SYMBOL(cfpkt_qcount);
+
+struct cfpkt *cfpkt_clone_release(struct cfpkt *pkt)
+{
+ struct cfpkt *clone;
+ clone = skb_to_pkt(skb_clone(pkt_to_skb(pkt), GFP_ATOMIC));
+ /* Free original packet. */
+ cfpkt_destroy(pkt);
+ if (!clone)
+ return NULL;
+ atomic_inc(&cfpkt_packet_count);
+ return clone;
+}
+EXPORT_SYMBOL(cfpkt_clone_release);
+
+struct caif_payload_info *cfpkt_info(struct cfpkt *pkt)
+{
+ return (struct caif_payload_info *)&pkt_to_skb(pkt)->cb;
+}
+EXPORT_SYMBOL(cfpkt_info);
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 09/12] net-caif: add CAIF netdevice
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-9-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Adding GPRS Net Device for PDP Contexts.
The device can be managed by RTNL as defined in if_caif.h.
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
net/caif/chnl_net.c | 429 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 429 insertions(+), 0 deletions(-)
diff --git a/net/caif/chnl_net.c b/net/caif/chnl_net.c
new file mode 100644
index 0000000..9df6fd3
--- /dev/null
+++ b/net/caif/chnl_net.c
@@ -0,0 +1,429 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Authors: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * Daniel Martensson / Daniel.Martensson@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/version.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/if_ether.h>
+#include <linux/moduleparam.h>
+#include <linux/ip.h>
+#include <linux/sched.h>
+#include <linux/sockios.h>
+#include <linux/caif/if_caif.h>
+#include <net/rtnetlink.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfcnfg.h>
+#include <net/caif/cfpkt.h>
+#include <net/caif/caif_dev.h>
+
+#define CAIF_CONNECT_TIMEOUT 30
+#define SIZE_MTU 1500
+#define SIZE_MTU_MAX 4080
+#define SIZE_MTU_MIN 68
+#define CAIF_NET_DEFAULT_QUEUE_LEN 500
+
+#undef pr_debug
+#define pr_debug pr_warning
+
+/*This list is protected by the rtnl lock. */
+static LIST_HEAD(chnl_net_list);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_RTNL_LINK("caif");
+
+struct chnl_net {
+ struct cflayer chnl;
+ struct net_device_stats stats;
+ struct caif_connect_request conn_req;
+ struct list_head list_field;
+ struct net_device *netdev;
+ char name[256];
+ wait_queue_head_t netmgmt_wq;
+ /* Flow status to remember and control the transmission. */
+ bool flowenabled;
+};
+
+static void robust_list_del(struct list_head *delete_node)
+{
+ struct list_head *list_node;
+ struct list_head *n;
+ ASSERT_RTNL();
+ list_for_each_safe(list_node, n, &chnl_net_list) {
+ if (list_node == delete_node) {
+ list_del(list_node);
+ break;
+ }
+ }
+}
+
+static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
+{
+ struct sk_buff *skb;
+ struct chnl_net *priv = NULL;
+ int pktlen;
+ int err = 0;
+
+ priv = container_of(layr, struct chnl_net, chnl);
+
+ if (!priv)
+ return -EINVAL;
+
+ /* Get length of CAIF packet. */
+ pktlen = cfpkt_getlen(pkt);
+
+ skb = (struct sk_buff *) cfpkt_tonative(pkt);
+ /* Pass some minimum information and
+ * send the packet to the net stack.
+ */
+ skb->dev = priv->netdev;
+ skb->protocol = htons(ETH_P_IP);
+
+ /* If we change the header in loop mode, the checksum is corrupted. */
+ if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ else
+ skb->ip_summed = CHECKSUM_COMPLETE;
+
+ /* FIXME: Drivers should call this in tasklet context. */
+ if (in_interrupt())
+ netif_rx(skb);
+ else
+ netif_rx_ni(skb);
+
+ /* Update statistics. */
+ priv->netdev->stats.rx_packets++;
+ priv->netdev->stats.rx_bytes += pktlen;
+
+ return err;
+}
+
+static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow,
+ int phyid)
+{
+ struct chnl_net *priv = NULL;
+ pr_debug("CAIF: %s(): NET flowctrl func called flow: %s.\n",
+ __func__,
+ flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" :
+ flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" :
+ flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" :
+ flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" :
+ flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" :
+ flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ?
+ "REMOTE_SHUTDOWN" : "UKNOWN CTRL COMMAND");
+
+ priv = container_of(layr, struct chnl_net, chnl);
+
+ switch (flow) {
+ case CAIF_CTRLCMD_FLOW_OFF_IND:
+ case CAIF_CTRLCMD_DEINIT_RSP:
+ case CAIF_CTRLCMD_INIT_FAIL_RSP:
+ case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
+ priv->flowenabled = false;
+ netif_tx_disable(priv->netdev);
+ wake_up_interruptible(&priv->netmgmt_wq);
+ break;
+ case CAIF_CTRLCMD_FLOW_ON_IND:
+ case CAIF_CTRLCMD_INIT_RSP:
+ priv->flowenabled = true;
+ netif_wake_queue(priv->netdev);
+ wake_up_interruptible(&priv->netmgmt_wq);
+ break;
+ default:
+ break;
+ }
+}
+
+static int chnl_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct chnl_net *priv;
+ struct cfpkt *pkt = NULL;
+ int len;
+ int result = -1;
+ /* Get our private data. */
+ priv = netdev_priv(dev);
+
+ if (skb->len > priv->netdev->mtu) {
+ pr_warning("CAIF: %s(): Size of skb exceeded MTU\n", __func__);
+ return -ENOSPC;
+ }
+
+ if (!priv->flowenabled) {
+ pr_debug("CAIF: %s(): dropping packets flow off\n", __func__);
+ return NETDEV_TX_BUSY;
+ }
+
+ if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
+ swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr);
+
+ /* Store original SKB length. */
+ len = skb->len;
+
+ pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb);
+
+ /* Send the packet down the stack. */
+ result = priv->chnl.dn->transmit(priv->chnl.dn, pkt);
+ if (result) {
+ if (result == -EAGAIN)
+ result = NETDEV_TX_BUSY;
+ return result;
+ }
+
+ /* Update statistics. */
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += len;
+
+ return NETDEV_TX_OK;
+}
+
+
+static int chnl_net_open(struct net_device *dev)
+{
+ struct chnl_net *priv = NULL;
+ int result = -1;
+ ASSERT_RTNL();
+
+ priv = netdev_priv(dev);
+ pr_debug("CAIF: %s(): dev name: %s\n", __func__, priv->name);
+
+ if (!priv) {
+ pr_debug("CAIF: %s(): chnl_net_open: no priv\n", __func__);
+ return -ENODEV;
+ }
+ result = caif_connect_client(&priv->conn_req, &priv->chnl);
+ if (result != 0) {
+ pr_debug("CAIF: %s(): err: "
+ "Unable to register and open device, Err:%d\n",
+ __func__,
+ result);
+ return -ENODEV;
+ }
+ result = wait_event_interruptible(priv->netmgmt_wq, priv->flowenabled);
+
+ if (result == -ERESTARTSYS) {
+ pr_debug("CAIF: %s(): wait_event_interruptible"
+ " woken by a signal\n", __func__);
+ return -ERESTARTSYS;
+ } else
+ pr_debug("CAIF: %s(): Flow on recieved\n", __func__);
+
+ return 0;
+}
+
+static int chnl_net_stop(struct net_device *dev)
+{
+ struct chnl_net *priv;
+ int result = -1;
+ ASSERT_RTNL();
+ priv = netdev_priv(dev);
+
+ result = caif_disconnect_client(&priv->chnl);
+ if (result != 0) {
+ pr_debug("CAIF: %s(): chnl_net_stop: err: "
+ "Unable to STOP device, Err:%d\n",
+ __func__, result);
+ return -EBUSY;
+ }
+ result = wait_event_interruptible(priv->netmgmt_wq,
+ !priv->flowenabled);
+
+ if (result == -ERESTARTSYS) {
+ pr_debug("CAIF: %s(): wait_event_interruptible woken by"
+ " signal, signal_pending(current) = %d\n",
+ __func__,
+ signal_pending(current));
+ } else {
+ pr_debug("CAIF: %s(): disconnect received\n", __func__);
+
+ }
+
+ return 0;
+}
+
+int chnl_net_init(struct net_device *dev)
+{
+ struct chnl_net *priv;
+ ASSERT_RTNL();
+ priv = netdev_priv(dev);
+ strncpy(priv->name, dev->name, sizeof(priv->name));
+ return 0;
+}
+
+void chnl_net_uninit(struct net_device *dev)
+{
+ struct chnl_net *priv;
+ ASSERT_RTNL();
+ priv = netdev_priv(dev);
+ robust_list_del(&priv->list_field);
+}
+
+static const struct net_device_ops netdev_ops = {
+ .ndo_open = chnl_net_open,
+ .ndo_stop = chnl_net_stop,
+ .ndo_init = chnl_net_init,
+ .ndo_uninit = chnl_net_uninit,
+ .ndo_start_xmit = chnl_net_start_xmit,
+};
+
+static void ipcaif_net_setup(struct net_device *dev)
+{
+ struct chnl_net *priv;
+ dev->netdev_ops = &netdev_ops;
+ dev->destructor = free_netdev;
+ dev->flags |= IFF_NOARP;
+ dev->flags |= IFF_POINTOPOINT;
+ dev->needed_headroom = CAIF_NEEDED_HEADROOM;
+ dev->needed_tailroom = CAIF_NEEDED_TAILROOM;
+ dev->mtu = SIZE_MTU;
+ dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN;
+
+ priv = netdev_priv(dev);
+ priv->chnl.receive = chnl_recv_cb;
+ priv->chnl.ctrlcmd = chnl_flowctrl_cb;
+ priv->netdev = dev;
+ priv->conn_req.protocol = CAIFPROTO_DATAGRAM;
+ priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW;
+ priv->conn_req.priority = CAIF_PRIO_LOW;
+ /* Insert illegal value */
+ priv->conn_req.sockaddr.u.dgm.connection_id = -1;
+ priv->flowenabled = false;
+
+ ASSERT_RTNL();
+ init_waitqueue_head(&priv->netmgmt_wq);
+ list_add(&priv->list_field, &chnl_net_list);
+}
+
+static int delete_device(struct chnl_net *dev)
+{
+ ASSERT_RTNL();
+ if (dev->netdev)
+ unregister_netdevice(dev->netdev);
+ return 0;
+}
+
+static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct chnl_net *priv;
+ u8 loop;
+ priv = netdev_priv(dev);
+ NLA_PUT_U32(skb, IFLA_CAIF_IPV4_CONNID,
+ priv->conn_req.sockaddr.u.dgm.connection_id);
+ NLA_PUT_U32(skb, IFLA_CAIF_IPV6_CONNID,
+ priv->conn_req.sockaddr.u.dgm.connection_id);
+ loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP;
+ NLA_PUT_U8(skb, IFLA_CAIF_LOOPBACK, loop);
+
+
+ return 0;
+nla_put_failure:
+ return -EMSGSIZE;
+
+}
+
+static void caif_netlink_parms(struct nlattr *data[],
+ struct caif_connect_request *conn_req)
+{
+ if (!data) {
+ pr_warning("CAIF: %s: no params data found\n", __func__);
+ return;
+ }
+ if (data[IFLA_CAIF_IPV4_CONNID])
+ conn_req->sockaddr.u.dgm.connection_id =
+ nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]);
+ if (data[IFLA_CAIF_IPV6_CONNID])
+ conn_req->sockaddr.u.dgm.connection_id =
+ nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]);
+ if (data[IFLA_CAIF_LOOPBACK]) {
+ if (nla_get_u8(data[IFLA_CAIF_LOOPBACK]))
+ conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP;
+ else
+ conn_req->protocol = CAIFPROTO_DATAGRAM;
+ }
+}
+
+static int ipcaif_newlink(struct net *src_net, struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ int ret;
+ struct chnl_net *caifdev;
+ ASSERT_RTNL();
+ caifdev = netdev_priv(dev);
+ caif_netlink_parms(data, &caifdev->conn_req);
+ ret = register_netdevice(dev);
+ if (ret)
+ pr_warning("CAIF: %s(): device rtml registration failed\n",
+ __func__);
+ return ret;
+}
+
+static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ struct chnl_net *caifdev;
+ ASSERT_RTNL();
+ caifdev = netdev_priv(dev);
+ caif_netlink_parms(data, &caifdev->conn_req);
+ netdev_state_change(dev);
+ return 0;
+}
+
+static size_t ipcaif_get_size(const struct net_device *dev)
+{
+ return
+ /* IFLA_CAIF_IPV4_CONNID */
+ nla_total_size(4) +
+ /* IFLA_CAIF_IPV6_CONNID */
+ nla_total_size(4) +
+ /* IFLA_CAIF_LOOPBACK */
+ nla_total_size(2) +
+ 0;
+}
+
+static const struct nla_policy ipcaif_policy[IFLA_CAIF_MAX + 1] = {
+ [IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 },
+ [IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 },
+ [IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 }
+};
+
+
+static struct rtnl_link_ops ipcaif_link_ops __read_mostly = {
+ .kind = "caif",
+ .priv_size = sizeof(struct chnl_net),
+ .setup = ipcaif_net_setup,
+ .maxtype = IFLA_CAIF_MAX,
+ .policy = ipcaif_policy,
+ .newlink = ipcaif_newlink,
+ .changelink = ipcaif_changelink,
+ .get_size = ipcaif_get_size,
+ .fill_info = ipcaif_fill_info,
+
+};
+
+
+static int __init chnl_init_module(void)
+{
+ return rtnl_link_register(&ipcaif_link_ops);
+}
+
+static void __exit chnl_exit_module(void)
+{
+ struct chnl_net *dev = NULL;
+ struct list_head *list_node;
+ struct list_head *_tmp;
+ rtnl_link_unregister(&ipcaif_link_ops);
+ rtnl_lock();
+ list_for_each_safe(list_node, _tmp, &chnl_net_list) {
+ dev = list_entry(list_node, struct chnl_net, list_field);
+ list_del(list_node);
+ delete_device(dev);
+ }
+ rtnl_unlock();
+}
+
+module_init(chnl_init_module);
+module_exit(chnl_exit_module);
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 05/12] net-caif: add CAIF core protocol stack
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-5-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
CAIF generic protocol implementation. This layer is
somewhat generic in order to be able to use and test it outside
the Linux Kernel.
cfctrl.c - CAIF control protocol layer
cfdbgl.c - CAIF debug protocol layer
cfdgml.c - CAIF datagram protocol layer
cffrml.c - CAIF framing protocol layer
cfmuxl.c - CAIF mux protocol layer
cfrfml.c - CAIF remote file manager protocol layer
cfserl.c - CAIF serial (fragmentation) protocol layer
cfsrvl.c - CAIF generic service layer functions
cfutill.c - CAIF utility protocol layer
cfveil.c - CAIF AT protocol layer
cfvidl.c - CAIF video protocol layer
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
net/caif/cfctrl.c | 711 ++++++++++++++++++++++++++++++++++++++++++++++++++++
net/caif/cfdbgl.c | 40 +++
net/caif/cfdgml.c | 108 ++++++++
net/caif/cffrml.c | 151 +++++++++++
net/caif/cfmuxl.c | 246 ++++++++++++++++++
net/caif/cfrfml.c | 106 ++++++++
net/caif/cfserl.c | 199 +++++++++++++++
net/caif/cfsrvl.c | 185 ++++++++++++++
net/caif/cfutill.c | 115 +++++++++
net/caif/cfveil.c | 107 ++++++++
net/caif/cfvidl.c | 65 +++++
11 files changed, 2033 insertions(+), 0 deletions(-)
diff --git a/net/caif/cfctrl.c b/net/caif/cfctrl.c
new file mode 100644
index 0000000..07c429c
--- /dev/null
+++ b/net/caif/cfctrl.c
@@ -0,0 +1,711 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/stddef.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfpkt.h>
+#include <net/caif/cfctrl.h>
+
+#define container_obj(layr) container_of(layr, struct cfctrl, serv.layer)
+#define UTILITY_NAME_LENGTH 16
+#define CFPKT_CTRL_PKT_LEN 20
+
+
+#ifdef CAIF_NO_LOOP
+static inline int handle_loop(struct cfctrl *ctrl,
+ int cmd, struct cfpkt *pkt){
+ return CAIF_FAILURE;
+}
+#else
+static int handle_loop(struct cfctrl *ctrl,
+ int cmd, struct cfpkt *pkt);
+#endif
+static int cfctrl_recv(struct cflayer *layr, struct cfpkt *pkt);
+static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid);
+
+
+struct cflayer *cfctrl_create()
+{
+ struct cfctrl *this =
+ kmalloc(sizeof(struct cfctrl), GFP_ATOMIC);
+ if (!this) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cfctrl, serv.layer) == 0);
+ memset(this, 0, sizeof(*this));
+ spin_lock_init(&this->info_list_lock);
+ atomic_set(&this->req_seq_no, 1);
+ atomic_set(&this->rsp_seq_no, 1);
+ this->serv.dev_info.id = 0xff;
+ this->serv.layer.id = 0;
+ this->serv.layer.receive = cfctrl_recv;
+ sprintf(this->serv.layer.name, "ctrl");
+ this->serv.layer.ctrlcmd = cfctrl_ctrlcmd;
+ spin_lock_init(&this->loop_linkid_lock);
+ this->loop_linkid = 1;
+ return &this->serv.layer;
+}
+
+bool param_eq(struct cfctrl_link_param *p1, struct cfctrl_link_param *p2)
+{
+ bool eq =
+ p1->linktype == p2->linktype &&
+ p1->priority == p2->priority &&
+ p1->phyid == p2->phyid &&
+ p1->endpoint == p2->endpoint && p1->chtype == p2->chtype;
+
+ if (!eq)
+ return false;
+
+ switch (p1->linktype) {
+ case CFCTRL_SRV_VEI:
+ return true;
+ case CFCTRL_SRV_DATAGRAM:
+ return p1->u.datagram.connid == p2->u.datagram.connid;
+ case CFCTRL_SRV_RFM:
+ return
+ p1->u.rfm.connid == p2->u.rfm.connid &&
+ strcmp(p1->u.rfm.volume, p2->u.rfm.volume) == 0;
+ case CFCTRL_SRV_UTIL:
+ return
+ p1->u.utility.fifosize_kb == p2->u.utility.fifosize_kb
+ && p1->u.utility.fifosize_bufs ==
+ p2->u.utility.fifosize_bufs
+ && strcmp(p1->u.utility.name, p2->u.utility.name) == 0
+ && p1->u.utility.paramlen == p2->u.utility.paramlen
+ && memcmp(p1->u.utility.params, p2->u.utility.params,
+ p1->u.utility.paramlen) == 0;
+
+ case CFCTRL_SRV_VIDEO:
+ return p1->u.video.connid == p2->u.video.connid;
+ case CFCTRL_SRV_DBG:
+ return true;
+ case CFCTRL_SRV_DECM:
+ return false;
+ default:
+ return false;
+ }
+ return false;
+}
+
+bool cfctrl_req_eq(struct cfctrl_request_info *r1,
+ struct cfctrl_request_info *r2)
+{
+ if (r1->cmd != r2->cmd)
+ return false;
+ if (r1->cmd == CFCTRL_CMD_LINK_SETUP)
+ return param_eq(&r1->param, &r2->param);
+ else
+ return r1->channel_id == r2->channel_id;
+}
+
+/* Insert request at the end */
+void cfctrl_insert_req(struct cfctrl *ctrl,
+ struct cfctrl_request_info *req)
+{
+ struct cfctrl_request_info *p;
+ spin_lock(&ctrl->info_list_lock);
+ req->next = NULL;
+ atomic_inc(&ctrl->req_seq_no);
+ req->sequence_no = atomic_read(&ctrl->req_seq_no);
+ if (ctrl->first_req == NULL) {
+ ctrl->first_req = req;
+ spin_unlock(&ctrl->info_list_lock);
+ return;
+ }
+ p = ctrl->first_req;
+ while (p->next != NULL)
+ p = p->next;
+ p->next = req;
+ spin_unlock(&ctrl->info_list_lock);
+}
+
+static void cfctrl_insert_req2(struct cfctrl *ctrl, enum cfctrl_cmd cmd,
+ u8 linkid, struct cflayer *user_layer)
+{
+ struct cfctrl_request_info *req = kmalloc(sizeof(*req), GFP_KERNEL);
+ if (!req) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ req->client_layer = user_layer;
+ req->cmd = cmd;
+ req->channel_id = linkid;
+ cfctrl_insert_req(ctrl, req);
+}
+
+/* Compare and remove request */
+struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl,
+ struct cfctrl_request_info *req)
+{
+ struct cfctrl_request_info *p;
+ struct cfctrl_request_info *ret;
+
+ spin_lock(&ctrl->info_list_lock);
+ if (ctrl->first_req == NULL) {
+ spin_unlock(&ctrl->info_list_lock);
+ return NULL;
+ }
+
+ if (cfctrl_req_eq(req, ctrl->first_req)) {
+ ret = ctrl->first_req;
+ atomic_set(&ctrl->rsp_seq_no,
+ ctrl->first_req->sequence_no);
+ ctrl->first_req = ctrl->first_req->next;
+ spin_unlock(&ctrl->info_list_lock);
+ return ret;
+ }
+
+ pr_warning("CAIF: %s(): Requests are not received in order/matching\n",
+ __func__);
+
+ p = ctrl->first_req;
+
+ while (p->next != NULL) {
+ if (cfctrl_req_eq(req, p->next)) {
+ ret = p->next;
+ atomic_set(&ctrl->rsp_seq_no,
+ p->next->sequence_no);
+ p = p->next;
+ spin_unlock(&ctrl->info_list_lock);
+ return ret;
+ }
+ p = p->next;
+ }
+ spin_unlock(&ctrl->info_list_lock);
+ return NULL;
+}
+
+/* Compare and remove old requests based on sequence no. */
+void cfctrl_prune_req(struct cfctrl *ctrl)
+{
+ struct cfctrl_request_info *p;
+ struct cfctrl_request_info *del;
+
+ spin_lock(&ctrl->info_list_lock);
+ if (ctrl->first_req == NULL) {
+ spin_unlock(&ctrl->info_list_lock);
+ return;
+ }
+
+ if (ctrl->first_req->sequence_no <
+ atomic_read(&ctrl->req_seq_no)) {
+ del = ctrl->first_req;
+ ctrl->first_req = ctrl->first_req->next;
+ kfree(del);
+ }
+ p = ctrl->first_req;
+ while (p->next != NULL) {
+ if (p->next->sequence_no <
+ atomic_read(&ctrl->rsp_seq_no)) {
+ del = p->next;
+ p = p->next;
+ atomic_set(&ctrl->rsp_seq_no,
+ ctrl->first_req->sequence_no);
+ kfree(del);
+ }
+ p = p->next;
+ }
+ spin_unlock(&ctrl->info_list_lock);
+}
+
+struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer)
+{
+ struct cfctrl *this = container_obj(layer);
+ return &this->res;
+}
+
+void cfctrl_set_dnlayer(struct cflayer *this, struct cflayer *dn)
+{
+ this->dn = dn;
+}
+
+void cfctrl_set_uplayer(struct cflayer *this, struct cflayer *up)
+{
+ this->up = up;
+}
+
+void init_info(struct caif_payload_info *info, struct cfctrl *cfctrl)
+{
+ info->hdr_len = 0;
+ info->channel_id = cfctrl->serv.layer.id;
+ info->dev_info = &cfctrl->serv.dev_info;
+}
+
+void cfctrl_enum_req(struct cflayer *layer, u8 physlinkid)
+{
+ struct cfctrl *cfctrl = container_obj(layer);
+ int ret;
+ struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
+ if (!pkt) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ caif_assert(offsetof(struct cfctrl, serv.layer) == 0);
+ init_info(cfpkt_info(pkt), cfctrl);
+ cfpkt_info(pkt)->dev_info->id = physlinkid;
+ cfctrl->serv.dev_info.id = physlinkid;
+ cfpkt_addbdy(pkt, CFCTRL_CMD_ENUM);
+ cfpkt_addbdy(pkt, physlinkid);
+ ret =
+ cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
+ if (ret < 0) {
+ pr_err("CAIF: %s(): Could not transmit enum message\n",
+ __func__);
+ cfpkt_destroy(pkt);
+ }
+}
+
+void cfctrl_linkup_request(struct cflayer *layer,
+ struct cfctrl_link_param *param,
+ struct cflayer *user_layer)
+{
+ struct cfctrl *cfctrl = container_obj(layer);
+ u32 tmp32;
+ u16 tmp16;
+ u8 tmp8;
+ struct cfctrl_request_info *req;
+ int ret;
+ char utility_name[16];
+ struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
+ if (!pkt) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_SETUP);
+ cfpkt_addbdy(pkt, (param->chtype << 4) + param->linktype);
+ cfpkt_addbdy(pkt, (param->priority << 3) + param->phyid);
+ cfpkt_addbdy(pkt, param->endpoint & 0x03);
+
+ switch (param->linktype) {
+ case CFCTRL_SRV_VEI:
+ break;
+ case CFCTRL_SRV_VIDEO:
+ cfpkt_addbdy(pkt, (u8) param->u.video.connid);
+ break;
+ case CFCTRL_SRV_DBG:
+ break;
+ case CFCTRL_SRV_DATAGRAM:
+ tmp32 = cpu_to_le32(param->u.datagram.connid);
+ cfpkt_add_body(pkt, &tmp32, 4);
+ break;
+ case CFCTRL_SRV_RFM:
+ /* Construct a frame, convert DatagramConnectionID to network
+ * format long and copy it out...
+ */
+ tmp32 = cpu_to_le32(param->u.rfm.connid);
+ cfpkt_add_body(pkt, &tmp32, 4);
+ /* Add volume name, including zero termination... */
+ cfpkt_add_body(pkt, param->u.rfm.volume,
+ strlen(param->u.rfm.volume) + 1);
+ break;
+ case CFCTRL_SRV_UTIL:
+ tmp16 = cpu_to_le16(param->u.utility.fifosize_kb);
+ cfpkt_add_body(pkt, &tmp16, 2);
+ tmp16 = cpu_to_le16(param->u.utility.fifosize_bufs);
+ cfpkt_add_body(pkt, &tmp16, 2);
+ memset(utility_name, 0, sizeof(utility_name));
+ strncpy(utility_name, param->u.utility.name,
+ UTILITY_NAME_LENGTH - 1);
+ cfpkt_add_body(pkt, utility_name, UTILITY_NAME_LENGTH);
+ tmp8 = param->u.utility.paramlen;
+ cfpkt_add_body(pkt, &tmp8, 1);
+ cfpkt_add_body(pkt, param->u.utility.params,
+ param->u.utility.paramlen);
+ break;
+ default:
+ pr_warning("CAIF: %s():Request setup of bad link type = %d\n",
+ __func__, param->linktype);
+ }
+ req = kmalloc(sizeof(*req), GFP_KERNEL);
+ if (!req) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ memset(req, 0, sizeof(*req));
+ req->client_layer = user_layer;
+ req->cmd = CFCTRL_CMD_LINK_SETUP;
+ req->param = *param;
+ cfctrl_insert_req(cfctrl, req);
+ init_info(cfpkt_info(pkt), cfctrl);
+ cfpkt_info(pkt)->dev_info->id = param->phyid;
+ ret =
+ cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
+ if (ret < 0) {
+ pr_err("CAIF: %s(): Could not transmit linksetup request\n",
+ __func__);
+ cfpkt_destroy(pkt);
+ }
+}
+
+int cfctrl_linkdown_req(struct cflayer *layer, u8 channelid,
+ struct cflayer *client)
+{
+ int ret;
+ struct cfctrl *cfctrl = container_obj(layer);
+ struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
+ if (!pkt) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return -ENOMEM;
+ }
+ cfctrl_insert_req2(cfctrl, CFCTRL_CMD_LINK_DESTROY, channelid, client);
+ cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY);
+ cfpkt_addbdy(pkt, channelid);
+ init_info(cfpkt_info(pkt), cfctrl);
+ ret =
+ cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
+ if (ret < 0) {
+ pr_err("CAIF: %s(): Could not transmit link-down request\n",
+ __func__);
+ cfpkt_destroy(pkt);
+ }
+ return ret;
+}
+
+void cfctrl_sleep_req(struct cflayer *layer)
+{
+ int ret;
+ struct cfctrl *cfctrl = container_obj(layer);
+ struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
+ if (!pkt) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ cfpkt_addbdy(pkt, CFCTRL_CMD_SLEEP);
+ init_info(cfpkt_info(pkt), cfctrl);
+ ret =
+ cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
+ if (ret < 0)
+ cfpkt_destroy(pkt);
+}
+
+void cfctrl_wake_req(struct cflayer *layer)
+{
+ int ret;
+ struct cfctrl *cfctrl = container_obj(layer);
+ struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
+ if (!pkt) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ cfpkt_addbdy(pkt, CFCTRL_CMD_WAKE);
+ init_info(cfpkt_info(pkt), cfctrl);
+ ret =
+ cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
+ if (ret < 0)
+ cfpkt_destroy(pkt);
+}
+
+void cfctrl_getstartreason_req(struct cflayer *layer)
+{
+ int ret;
+ struct cfctrl *cfctrl = container_obj(layer);
+ struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
+ if (!pkt) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ cfpkt_addbdy(pkt, CFCTRL_CMD_START_REASON);
+ init_info(cfpkt_info(pkt), cfctrl);
+ ret =
+ cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
+ if (ret < 0)
+ cfpkt_destroy(pkt);
+}
+
+void cfctrl_setmode_req(struct cflayer *layer, u8 mode)
+{
+ int ret;
+ struct cfctrl *cfctrl = container_obj(layer);
+ struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
+ if (!pkt) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return;
+ }
+ cfpkt_addbdy(pkt, CFCTRL_CMD_RADIO_SET);
+ cfpkt_addbdy(pkt, mode);
+ init_info(cfpkt_info(pkt), cfctrl);
+ ret =
+ cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
+ if (ret < 0)
+ cfpkt_destroy(pkt);
+}
+
+static int cfctrl_recv(struct cflayer *layer, struct cfpkt *pkt)
+{
+ u8 cmdrsp;
+ u8 cmd;
+ int ret = -1;
+ u16 tmp16;
+ u8 len;
+ u8 param[255];
+ u8 linkid;
+ struct cfctrl *cfctrl = container_obj(layer);
+ struct cfctrl_request_info rsp, *req;
+
+
+ cfpkt_extr_head(pkt, &cmdrsp, 1);
+ cmd = cmdrsp & CFCTRL_CMD_MASK;
+ if (cmd != CFCTRL_CMD_LINK_ERR
+ && CFCTRL_RSP_BIT != (CFCTRL_RSP_BIT & cmdrsp)) {
+ if (handle_loop(cfctrl, cmd, pkt) == CAIF_FAILURE) {
+ pr_info("CAIF: %s() CAIF Protocol error:"
+ "Response bit not set\n", __func__);
+ goto error;
+ }
+ }
+
+ switch (cmd) {
+ case CFCTRL_CMD_LINK_SETUP:
+ {
+ enum cfctrl_srv serv;
+ enum cfctrl_srv servtype;
+ u8 endpoint;
+ u8 physlinkid;
+ u8 prio;
+ u8 tmp;
+ u32 tmp32;
+ u8 *cp;
+ int i;
+ struct cfctrl_link_param linkparam;
+ memset(&linkparam, 0, sizeof(linkparam));
+
+ cfpkt_extr_head(pkt, &tmp, 1);
+
+ serv = tmp & CFCTRL_SRV_MASK;
+ linkparam.linktype = serv;
+
+ servtype = tmp >> 4;
+ linkparam.chtype = servtype;
+
+ cfpkt_extr_head(pkt, &tmp, 1);
+ physlinkid = tmp & 0x07;
+ prio = tmp >> 3;
+
+ linkparam.priority = prio;
+ linkparam.phyid = physlinkid;
+ cfpkt_extr_head(pkt, &endpoint, 1);
+ linkparam.endpoint = endpoint & 0x03;
+
+ switch (serv) {
+ case CFCTRL_SRV_VEI:
+ case CFCTRL_SRV_DBG:
+ /* Link ID */
+ cfpkt_extr_head(pkt, &linkid, 1);
+ break;
+ case CFCTRL_SRV_VIDEO:
+ cfpkt_extr_head(pkt, &tmp, 1);
+ linkparam.u.video.connid = tmp;
+ /* Link ID */
+ cfpkt_extr_head(pkt, &linkid, 1);
+ break;
+
+ case CFCTRL_SRV_DATAGRAM:
+ cfpkt_extr_head(pkt, &tmp32, 4);
+ linkparam.u.datagram.connid =
+ le32_to_cpu(tmp32);
+ /* Link ID */
+ cfpkt_extr_head(pkt, &linkid, 1);
+ break;
+ case CFCTRL_SRV_RFM:
+ /* Construct a frame, convert
+ * DatagramConnectionID
+ * to network format long and copy it out...
+ */
+ cfpkt_extr_head(pkt, &tmp32, 4);
+ linkparam.u.rfm.connid =
+ le32_to_cpu(tmp32);
+ cp = (u8 *) linkparam.u.rfm.volume;
+ for (cfpkt_extr_head(pkt, &tmp, 1);
+ cfpkt_more(pkt) && tmp != '\0';
+ cfpkt_extr_head(pkt, &tmp, 1))
+ *cp++ = tmp;
+ *cp = '\0';
+
+ /* Link ID */
+ cfpkt_extr_head(pkt, &linkid, 1);
+
+ break;
+ case CFCTRL_SRV_UTIL:
+ /* Construct a frame, convert
+ * DatagramConnectionID
+ * to network format long and copy it out...
+ */
+ /* Fifosize KB */
+ cfpkt_extr_head(pkt, &tmp16, 2);
+ linkparam.u.utility.fifosize_kb =
+ le16_to_cpu(tmp16);
+ /* Fifosize bufs */
+ cfpkt_extr_head(pkt, &tmp16, 2);
+ linkparam.u.utility.fifosize_bufs =
+ le16_to_cpu(tmp16);
+ /* name */
+ cp = (u8 *) linkparam.u.utility.name;
+ caif_assert(sizeof(linkparam.u.utility.name)
+ >= UTILITY_NAME_LENGTH);
+ for (i = 0;
+ i < UTILITY_NAME_LENGTH
+ && cfpkt_more(pkt); i++) {
+ cfpkt_extr_head(pkt, &tmp, 1);
+ *cp++ = tmp;
+ }
+ /* Length */
+ cfpkt_extr_head(pkt, &len, 1);
+ linkparam.u.utility.paramlen = len;
+ /* Param Data */
+ cp = linkparam.u.utility.params;
+ while (cfpkt_more(pkt) && len--) {
+ cfpkt_extr_head(pkt, &tmp, 1);
+ *cp++ = tmp;
+ }
+ /* Link ID */
+ cfpkt_extr_head(pkt, &linkid, 1);
+ /* Length */
+ cfpkt_extr_head(pkt, &len, 1);
+ /* Param Data */
+ cfpkt_extr_head(pkt, ¶m, len);
+ break;
+ default:
+ pr_warning("CAIF: %s(): Request setup "
+ "- invalid link type (%d)",
+ __func__, serv);
+ goto error;
+ }
+ if (cfpkt_erroneous(pkt)) {
+ pr_err("CAIF: %s(): Packet is erroneous!",
+ __func__);
+ goto error;
+ }
+ rsp.cmd = cmd;
+ rsp.param = linkparam;
+ req = cfctrl_remove_req(cfctrl, &rsp);
+
+ if (CFCTRL_ERR_BIT == (CFCTRL_ERR_BIT & cmdrsp)) {
+ pr_err("CAIF: %s(): Invalid O/E bit "
+ "on CAIF control channel", __func__);
+ cfctrl->res.reject_rsp(cfctrl->serv.layer.up,
+ 0,
+ req ? req->client_layer
+ : NULL);
+ } else {
+ cfctrl->res.linksetup_rsp(cfctrl->serv.
+ layer.up, linkid,
+ serv, physlinkid,
+ req ? req->
+ client_layer : NULL);
+ }
+
+ if (req != NULL)
+ kfree(req);
+ }
+ break;
+ case CFCTRL_CMD_LINK_DESTROY:
+ cfpkt_extr_head(pkt, &linkid, 1);
+ rsp.cmd = cmd;
+ rsp.channel_id = linkid;
+ req = cfctrl_remove_req(cfctrl, &rsp);
+ cfctrl->res.linkdestroy_rsp(cfctrl->serv.layer.up, linkid,
+ req ? req->client_layer : NULL);
+ if (req != NULL)
+ kfree(req);
+ break;
+ case CFCTRL_CMD_LINK_ERR:
+ pr_err("CAIF: %s(): Frame Error Indication received \n",
+ __func__);
+ cfctrl->res.linkerror_ind();
+ break;
+ case CFCTRL_CMD_ENUM:
+ cfctrl->res.enum_rsp();
+ break;
+ case CFCTRL_CMD_SLEEP:
+ cfctrl->res.sleep_rsp();
+ break;
+ case CFCTRL_CMD_WAKE:
+ cfctrl->res.wake_rsp();
+ break;
+ case CFCTRL_CMD_LINK_RECONF:
+ cfctrl->res.restart_rsp();
+ break;
+ case CFCTRL_CMD_RADIO_SET:
+ cfctrl->res.radioset_rsp();
+ break;
+ default:
+ pr_err("CAIF: %s(): Unrecognized Control Frame\n", __func__);
+ goto error;
+ break;
+ }
+ ret = 0;
+error:
+ cfpkt_destroy(pkt);
+ return ret;
+}
+
+static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid)
+{
+ struct cfctrl *this = container_obj(layr);
+ switch (ctrl) {
+ case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND:
+ case CAIF_CTRLCMD_FLOW_OFF_IND:
+ spin_lock(&this->info_list_lock);
+ if (this->first_req != NULL) {
+ pr_warning("CAIF: %s(): Received flow off in "
+ "control layer", __func__);
+ }
+ spin_unlock(&this->info_list_lock);
+ break;
+ default:
+ break;
+ }
+}
+
+#ifndef CAIF_NO_LOOP
+int handle_loop(struct cfctrl *ctrl, int cmd, struct cfpkt *pkt)
+{
+ static int last_linkid;
+ u8 linkid, linktype, tmp;
+ switch (cmd) {
+ case CFCTRL_CMD_LINK_SETUP:
+ spin_lock(&ctrl->loop_linkid_lock);
+ for (linkid = last_linkid + 1; linkid < 255; linkid++)
+ if (!ctrl->loop_linkused[linkid])
+ goto found;
+ for (linkid = last_linkid - 1; linkid > 0; linkid--)
+ if (!ctrl->loop_linkused[linkid])
+ goto found;
+ return -EINVAL;
+found:
+ if (!ctrl->loop_linkused[linkid])
+ ctrl->loop_linkused[linkid] = 1;
+
+ last_linkid = linkid;
+
+ cfpkt_add_trail(pkt, &linkid, 1);
+ spin_unlock(&ctrl->loop_linkid_lock);
+ cfpkt_peek_head(pkt, &linktype, 1);
+ if (linktype == CFCTRL_SRV_UTIL) {
+ tmp = 0x01;
+ cfpkt_add_trail(pkt, &tmp, 1);
+ cfpkt_add_trail(pkt, &tmp, 1);
+ }
+ break;
+
+ case CFCTRL_CMD_LINK_DESTROY:
+ spin_lock(&ctrl->loop_linkid_lock);
+ cfpkt_peek_head(pkt, &linkid, 1);
+ ctrl->loop_linkused[linkid] = 0;
+ spin_unlock(&ctrl->loop_linkid_lock);
+ break;
+ default:
+ break;
+ }
+ return CAIF_SUCCESS;
+}
+#endif
diff --git a/net/caif/cfdbgl.c b/net/caif/cfdbgl.c
new file mode 100644
index 0000000..ab6b6dc
--- /dev/null
+++ b/net/caif/cfdbgl.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/stddef.h>
+#include <linux/slab.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfsrvl.h>
+#include <net/caif/cfpkt.h>
+
+static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt);
+
+struct cflayer *cfdbgl_create(u8 channel_id, struct dev_info *dev_info)
+{
+ struct cfsrvl *dbg = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
+ if (!dbg) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cfsrvl, layer) == 0);
+ memset(dbg, 0, sizeof(struct cfsrvl));
+ cfsrvl_init(dbg, channel_id, dev_info);
+ dbg->layer.receive = cfdbgl_receive;
+ dbg->layer.transmit = cfdbgl_transmit;
+ snprintf(dbg->layer.name, CAIF_LAYER_NAME_SZ - 1, "dbg%d", channel_id);
+ return &dbg->layer;
+}
+
+static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt)
+{
+ return layr->up->receive(layr->up, pkt);
+}
+
+static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt)
+{
+ return layr->dn->transmit(layr->dn, pkt);
+}
diff --git a/net/caif/cfdgml.c b/net/caif/cfdgml.c
new file mode 100644
index 0000000..5319484
--- /dev/null
+++ b/net/caif/cfdgml.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/stddef.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfsrvl.h>
+#include <net/caif/cfpkt.h>
+
+#define container_obj(layr) ((struct cfsrvl *) layr)
+
+#define DGM_CMD_BIT 0x80
+#define DGM_FLOW_OFF 0x81
+#define DGM_FLOW_ON 0x80
+#define DGM_CTRL_PKT_SIZE 1
+
+static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt);
+
+struct cflayer *cfdgml_create(u8 channel_id, struct dev_info *dev_info)
+{
+ struct cfsrvl *dgm = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
+ if (!dgm) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cfsrvl, layer) == 0);
+ memset(dgm, 0, sizeof(struct cfsrvl));
+ cfsrvl_init(dgm, channel_id, dev_info);
+ dgm->layer.receive = cfdgml_receive;
+ dgm->layer.transmit = cfdgml_transmit;
+ snprintf(dgm->layer.name, CAIF_LAYER_NAME_SZ - 1, "dgm%d", channel_id);
+ dgm->layer.name[CAIF_LAYER_NAME_SZ - 1] = '\0';
+ return &dgm->layer;
+}
+
+static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u8 cmd = -1;
+ u8 dgmhdr[3];
+ int ret;
+ caif_assert(layr->up != NULL);
+ caif_assert(layr->receive != NULL);
+ caif_assert(layr->ctrlcmd != NULL);
+
+ if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+
+ if ((cmd & DGM_CMD_BIT) == 0) {
+ if (cfpkt_extr_head(pkt, &dgmhdr, 3) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+ ret = layr->up->receive(layr->up, pkt);
+ return ret;
+ }
+
+ switch (cmd) {
+ case DGM_FLOW_OFF: /* FLOW OFF */
+ layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
+ cfpkt_destroy(pkt);
+ return 0;
+ case DGM_FLOW_ON: /* FLOW ON */
+ layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
+ cfpkt_destroy(pkt);
+ return 0;
+ default:
+ cfpkt_destroy(pkt);
+ pr_info("CAIF: %s(): Unknown datagram control %d (0x%x)\n",
+ __func__, cmd, cmd);
+ return -EPROTO;
+ }
+}
+
+static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u32 zero = 0;
+ struct caif_payload_info *info;
+ struct cfsrvl *service = container_obj(layr);
+ int ret;
+ if (!cfsrvl_ready(service, &ret))
+ return ret;
+
+ cfpkt_add_head(pkt, &zero, 4);
+
+ /* Add info for MUX-layer to route the packet out. */
+ info = cfpkt_info(pkt);
+ info->channel_id = service->layer.id;
+ /* To optimize alignment, we add up the size of CAIF header
+ * before payload.
+ */
+ info->hdr_len = 4;
+ info->dev_info = &service->dev_info;
+ ret = layr->dn->transmit(layr->dn, pkt);
+ if (ret < 0) {
+ u32 tmp32;
+ cfpkt_extr_head(pkt, &tmp32, 4);
+ }
+ return ret;
+}
diff --git a/net/caif/cffrml.c b/net/caif/cffrml.c
new file mode 100644
index 0000000..59d6ae0
--- /dev/null
+++ b/net/caif/cffrml.c
@@ -0,0 +1,151 @@
+/*
+ * CAIF Framing Layer.
+ *
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/stddef.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/crc-ccitt.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfpkt.h>
+#include <net/caif/cffrml.h>
+
+#define container_obj(layr) container_of(layr, struct cffrml, layer)
+
+struct cffrml {
+ struct cflayer layer;
+ bool dofcs; /* !< FCS active */
+};
+
+static int cffrml_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cffrml_transmit(struct cflayer *layr, struct cfpkt *pkt);
+static void cffrml_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid);
+
+u32 cffrml_rcv_error;
+u32 cffrml_rcv_checsum_error;
+struct cflayer *cffrml_create(u16 phyid, bool use_fcs)
+{
+ struct cffrml *this = kmalloc(sizeof(struct cffrml), GFP_ATOMIC);
+ if (!this) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cffrml, layer) == 0);
+
+ memset(this, 0, sizeof(struct cflayer));
+ this->layer.receive = cffrml_receive;
+ this->layer.transmit = cffrml_transmit;
+ this->layer.ctrlcmd = cffrml_ctrlcmd;
+ snprintf(this->layer.name, CAIF_LAYER_NAME_SZ, "frm%d", phyid);
+ this->dofcs = use_fcs;
+ this->layer.id = phyid;
+ return (struct cflayer *) this;
+}
+
+void cffrml_set_uplayer(struct cflayer *this, struct cflayer *up)
+{
+ this->up = up;
+}
+
+void cffrml_set_dnlayer(struct cflayer *this, struct cflayer *dn)
+{
+ this->dn = dn;
+}
+
+static u16 cffrml_checksum(u16 chks, void *buf, __u16 len)
+{
+ /* FIXME: FCS should be moved to glue in order to use OS-Specific
+ * solutions
+ */
+ return crc_ccitt(chks, buf, len);
+}
+
+static int cffrml_receive(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u16 tmp;
+ u16 len;
+ u16 hdrchks;
+ u16 pktchks;
+ struct cffrml *this;
+ this = container_obj(layr);
+
+ cfpkt_extr_head(pkt, &tmp, 2);
+ len = le16_to_cpu(tmp);
+
+ /* Subtract for FCS on length if FCS is not used. */
+ if (!this->dofcs)
+ len -= 2;
+
+ if (cfpkt_setlen(pkt, len) < 0) {
+ ++cffrml_rcv_error;
+ pr_err("CAIF: %s():Framing length error (%d)\n", __func__, len);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+ /*
+ * Don't do extract if FCS is false, rather do setlen - then we don't
+ * get a cache-miss.
+ */
+ if (this->dofcs) {
+ cfpkt_extr_trail(pkt, &tmp, 2);
+ hdrchks = le16_to_cpu(tmp);
+ pktchks = cfpkt_iterate(pkt, cffrml_checksum, 0xffff);
+ if (pktchks != hdrchks) {
+ cfpkt_add_trail(pkt, &tmp, 2);
+ ++cffrml_rcv_error;
+ ++cffrml_rcv_checsum_error;
+ pr_info("CAIF: %s(): Frame checksum error "
+ "(0x%x != 0x%x)\n", __func__, hdrchks, pktchks);
+ return -EILSEQ;
+ }
+ }
+ if (cfpkt_erroneous(pkt)) {
+ ++cffrml_rcv_error;
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+ return layr->up->receive(layr->up, pkt);
+}
+
+static int cffrml_transmit(struct cflayer *layr, struct cfpkt *pkt)
+{
+ int tmp;
+ u16 chks;
+ u16 len;
+ int ret;
+ struct cffrml *this = container_obj(layr);
+ if (this->dofcs) {
+ chks = cfpkt_iterate(pkt, cffrml_checksum, 0xffff);
+ tmp = cpu_to_le16(chks);
+ cfpkt_add_trail(pkt, &tmp, 2);
+ } else {
+ cfpkt_pad_trail(pkt, 2);
+ }
+ len = cfpkt_getlen(pkt);
+ tmp = cpu_to_le16(len);
+ cfpkt_add_head(pkt, &tmp, 2);
+ cfpkt_info(pkt)->hdr_len += 2;
+ if (cfpkt_erroneous(pkt)) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ return -EPROTO;
+ }
+ ret = layr->dn->transmit(layr->dn, pkt);
+ if (ret < 0) {
+ /* Remove header on faulty packet. */
+ cfpkt_extr_head(pkt, &tmp, 2);
+ }
+ return ret;
+}
+
+static void cffrml_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid)
+{
+ if (layr->up->ctrlcmd)
+ layr->up->ctrlcmd(layr->up, ctrl, layr->id);
+}
diff --git a/net/caif/cfmuxl.c b/net/caif/cfmuxl.c
new file mode 100644
index 0000000..71e3371
--- /dev/null
+++ b/net/caif/cfmuxl.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#include <linux/stddef.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <net/caif/cfpkt.h>
+#include <net/caif/cfmuxl.h>
+#include <net/caif/cfsrvl.h>
+#include <net/caif/cffrml.h>
+
+#define container_obj(layr) container_of(layr, struct cfmuxl, layer)
+
+#define CAIF_CTRL_CHANNEL 0
+#define UP_CACHE_SIZE 8
+#define DN_CACHE_SIZE 8
+
+struct cfmuxl {
+ struct cflayer layer;
+ struct list_head srvl_list;
+ struct list_head frml_list;
+ struct cflayer *up_cache[UP_CACHE_SIZE];
+ struct cflayer *dn_cache[DN_CACHE_SIZE];
+ /*
+ * Set when inserting or removing downwards layers.
+ */
+ spinlock_t transmit_lock;
+
+ /*
+ * Set when inserting or removing upwards layers.
+ */
+ spinlock_t receive_lock;
+
+};
+
+static int cfmuxl_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cfmuxl_transmit(struct cflayer *layr, struct cfpkt *pkt);
+static void cfmuxl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid);
+static struct cflayer *get_up(struct cfmuxl *muxl, int id);
+
+struct cflayer *cfmuxl_create()
+{
+ struct cfmuxl *this = kmalloc(sizeof(struct cfmuxl), GFP_ATOMIC);
+ if (!this)
+ return NULL;
+ memset(this, 0, sizeof(*this));
+ this->layer.receive = cfmuxl_receive;
+ this->layer.transmit = cfmuxl_transmit;
+ this->layer.ctrlcmd = cfmuxl_ctrlcmd;
+ INIT_LIST_HEAD(&this->srvl_list);
+ INIT_LIST_HEAD(&this->frml_list);
+ spin_lock_init(&this->transmit_lock);
+ spin_lock_init(&this->receive_lock);
+ snprintf(this->layer.name, CAIF_LAYER_NAME_SZ, "mux");
+ return &this->layer;
+}
+
+int cfmuxl_set_uplayer(struct cflayer *layr, struct cflayer *up, u8 linkid)
+{
+ struct cfmuxl *muxl = container_obj(layr);
+ spin_lock(&muxl->receive_lock);
+ list_add(&up->node, &muxl->srvl_list);
+ spin_unlock(&muxl->receive_lock);
+ return 0;
+}
+
+bool cfmuxl_is_phy_inuse(struct cflayer *layr, u8 phyid)
+{
+ struct list_head *node;
+ struct cflayer *layer;
+ struct cfmuxl *muxl = container_obj(layr);
+ bool match = false;
+ spin_lock(&muxl->receive_lock);
+
+ list_for_each(node, &muxl->srvl_list) {
+ layer = list_entry(node, struct cflayer, node);
+ if (cfsrvl_phyid_match(layer, phyid)) {
+ match = true;
+ break;
+ }
+
+ }
+ spin_unlock(&muxl->receive_lock);
+ return match;
+}
+
+u8 cfmuxl_get_phyid(struct cflayer *layr, u8 channel_id)
+{
+ struct cflayer *up;
+ int phyid;
+ struct cfmuxl *muxl = container_obj(layr);
+ spin_lock(&muxl->receive_lock);
+ up = get_up(muxl, channel_id);
+ if (up != NULL)
+ phyid = cfsrvl_getphyid(up);
+ else
+ phyid = 0;
+ spin_unlock(&muxl->receive_lock);
+ return phyid;
+}
+
+int cfmuxl_set_dnlayer(struct cflayer *layr, struct cflayer *dn, u8 phyid)
+{
+ struct cfmuxl *muxl = (struct cfmuxl *) layr;
+ spin_lock(&muxl->transmit_lock);
+ list_add(&dn->node, &muxl->frml_list);
+ spin_unlock(&muxl->transmit_lock);
+ return 0;
+}
+struct cflayer *get_from_id(struct list_head *list, int id)
+{
+ struct list_head *node;
+ struct cflayer *layer;
+ list_for_each(node, list) {
+ layer = list_entry(node, struct cflayer, node);
+ if (layer->id == id)
+ return layer;
+ }
+ return NULL;
+}
+
+struct cflayer *cfmuxl_remove_dnlayer(struct cflayer *layr, u8 phyid)
+{
+ struct cfmuxl *muxl = container_obj(layr);
+ struct cflayer *dn;
+ spin_lock(&muxl->transmit_lock);
+ memset(muxl->dn_cache, 0, sizeof(muxl->dn_cache));
+ dn = get_from_id(&muxl->frml_list, phyid);
+ if (dn == NULL)
+ return NULL;
+ list_del(&dn->node);
+ caif_assert(dn != NULL);
+ spin_unlock(&muxl->transmit_lock);
+ return dn;
+}
+
+
+/* Invariant: lock is taken */
+static struct cflayer *get_up(struct cfmuxl *muxl, int id)
+{
+ struct cflayer *up;
+ int idx = id % UP_CACHE_SIZE;
+ up = muxl->up_cache[idx];
+ if (up == NULL || up->id != id) {
+ up = get_from_id(&muxl->srvl_list, id);
+ muxl->up_cache[idx] = up;
+ }
+ return up;
+}
+
+/* Invariant: lock is taken */
+static struct cflayer *get_dn(struct cfmuxl *muxl, struct dev_info *dev_info)
+{
+ struct cflayer *dn;
+ int idx = dev_info->id % DN_CACHE_SIZE;
+ dn = muxl->dn_cache[idx];
+ if (dn == NULL || dn->id != dev_info->id) {
+ dn = get_from_id(&muxl->frml_list, dev_info->id);
+ muxl->dn_cache[idx] = dn;
+ }
+ return dn;
+}
+
+struct cflayer *cfmuxl_remove_uplayer(struct cflayer *layr, u8 id)
+{
+ struct cflayer *up;
+ struct cfmuxl *muxl = container_obj(layr);
+ spin_lock(&muxl->receive_lock);
+ up = get_up(muxl, id);
+ memset(muxl->up_cache, 0, sizeof(muxl->up_cache));
+ list_del(&up->node);
+ spin_unlock(&muxl->receive_lock);
+ return up;
+}
+
+static int cfmuxl_receive(struct cflayer *layr, struct cfpkt *pkt)
+{
+ int ret;
+ struct cfmuxl *muxl = container_obj(layr);
+ u8 id;
+ struct cflayer *up;
+ if (cfpkt_extr_head(pkt, &id, 1) < 0) {
+ pr_err("CAIF: %s(): erroneous Caif Packet\n", __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+
+ spin_lock(&muxl->receive_lock);
+ up = get_up(muxl, id);
+ spin_unlock(&muxl->receive_lock);
+ if (up == NULL) {
+ pr_info("CAIF: %s():Received data on unknown link ID = %d "
+ "(0x%x) up == NULL", __func__, id, id);
+ cfpkt_destroy(pkt);
+ /*
+ * Don't return ERROR, since modem misbehaves and sends out
+ * flow on before linksetup response.
+ */
+ return /* CFGLU_EPROT; */ 0;
+ }
+
+ ret = up->receive(up, pkt);
+
+
+ return ret;
+}
+
+static int cfmuxl_transmit(struct cflayer *layr, struct cfpkt *pkt)
+{
+ int ret;
+ struct cfmuxl *muxl = container_obj(layr);
+ u8 linkid;
+ struct cflayer *dn;
+ struct caif_payload_info *info = cfpkt_info(pkt);
+ dn = get_dn(muxl, cfpkt_info(pkt)->dev_info);
+ if (dn == NULL) {
+ pr_warning("CAIF: %s(): Send data on unknown phy "
+ "ID = %d (0x%x)\n",
+ __func__, info->dev_info->id, info->dev_info->id);
+ return -ENOTCONN;
+ }
+ info->hdr_len += 1;
+ linkid = info->channel_id;
+ cfpkt_add_head(pkt, &linkid, 1);
+ ret = dn->transmit(dn, pkt);
+ /* Remove MUX protocol header upon error. */
+ if (ret < 0)
+ cfpkt_extr_head(pkt, &linkid, 1);
+ return ret;
+}
+
+static void cfmuxl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid)
+{
+ struct cfmuxl *muxl = container_obj(layr);
+ struct list_head *node;
+ struct cflayer *layer;
+ list_for_each(node, &muxl->srvl_list) {
+ layer = list_entry(node, struct cflayer, node);
+ if (cfsrvl_phyid_match(layer, phyid))
+ layer->ctrlcmd(layer, ctrl, phyid);
+ }
+}
diff --git a/net/caif/cfrfml.c b/net/caif/cfrfml.c
new file mode 100644
index 0000000..f068231
--- /dev/null
+++ b/net/caif/cfrfml.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/stddef.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfsrvl.h>
+#include <net/caif/cfpkt.h>
+
+#define container_obj(layr) container_of(layr, struct cfsrvl, layer)
+
+#define RFM_SEGMENTATION_BIT 0x01
+#define RFM_PAYLOAD 0x00
+#define RFM_CMD_BIT 0x80
+#define RFM_FLOW_OFF 0x81
+#define RFM_FLOW_ON 0x80
+#define RFM_SET_PIN 0x82
+#define RFM_CTRL_PKT_SIZE 1
+
+static int cfrfml_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cfrfml_transmit(struct cflayer *layr, struct cfpkt *pkt);
+
+struct cflayer *cfrfml_create(u8 channel_id, struct dev_info *dev_info)
+{
+ struct cfsrvl *rfm = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
+ if (!rfm) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cfsrvl, layer) == 0);
+ memset(rfm, 0, sizeof(struct cfsrvl));
+ cfsrvl_init(rfm, channel_id, dev_info);
+ rfm->layer.receive = cfrfml_receive;
+ rfm->layer.transmit = cfrfml_transmit;
+ snprintf(rfm->layer.name, CAIF_LAYER_NAME_SZ, "rfm%d", channel_id);
+ return &rfm->layer;
+}
+
+void cffrml_destroy(struct cflayer *layer)
+{
+ kfree(layer);
+}
+
+static int cfrfml_receive(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u8 tmp;
+ bool segmented;
+ int ret;
+ caif_assert(layr->up != NULL);
+ caif_assert(layr->receive != NULL);
+
+ /*
+ * RFM is taking care of segmentation and stripping of
+ * segmentation bit.
+ */
+ if (cfpkt_extr_head(pkt, &tmp, 1) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+ segmented = tmp & RFM_SEGMENTATION_BIT;
+ caif_assert(!segmented);
+
+ ret = layr->up->receive(layr->up, pkt);
+ return ret;
+}
+
+static int cfrfml_transmit(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u8 tmp = 0;
+ int ret;
+ struct cfsrvl *service = container_obj(layr);
+
+ caif_assert(layr->dn != NULL);
+ caif_assert(layr->dn->transmit != NULL);
+
+ if (!cfsrvl_ready(service, &ret))
+ return ret;
+
+ if (!cfpkt_getlen(pkt) > CAIF_MAX_PAYLOAD_SIZE) {
+ pr_err("CAIF: %s():Packet too large - size=%d\n",
+ __func__, cfpkt_getlen(pkt));
+ return -EOVERFLOW;
+ }
+ if (cfpkt_add_head(pkt, &tmp, 1) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ return -EPROTO;
+ }
+
+ /* Add info for MUX-layer to route the packet out. */
+ cfpkt_info(pkt)->channel_id = service->layer.id;
+ /*
+ * To optimize alignment, we add up the size of CAIF header before
+ * payload.
+ */
+ cfpkt_info(pkt)->hdr_len = 1;
+ cfpkt_info(pkt)->dev_info = &service->dev_info;
+ ret = layr->dn->transmit(layr->dn, pkt);
+ if (ret < 0)
+ cfpkt_extr_head(pkt, &tmp, 1);
+ return ret;
+}
diff --git a/net/caif/cfserl.c b/net/caif/cfserl.c
new file mode 100644
index 0000000..69deeba
--- /dev/null
+++ b/net/caif/cfserl.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/stddef.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfpkt.h>
+#define container_obj(layr) ((struct cfserl *) layr)
+
+#define CFSERL_STX 0x02
+#define CAIF_MINIUM_PACKET_SIZE 4
+struct cfserl {
+ struct cflayer layer;
+ struct cfpkt *incomplete_frm;
+ spinlock_t sync;
+ bool usestx;
+};
+#define STXLEN(layr) (layr->usestx ? 1 : 0)
+
+static int cfserl_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cfserl_transmit(struct cflayer *layr, struct cfpkt *pkt);
+static void cfserl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid);
+
+struct cfserl *cfserl_create(int type, int instance, bool use_stx)
+{
+ struct cfserl *this = kmalloc(sizeof(struct cfserl), GFP_ATOMIC);
+ if (!this) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cfserl, layer) == 0);
+ memset(this, 0, sizeof(struct cfserl));
+ this->layer.receive = cfserl_receive;
+ this->layer.transmit = cfserl_transmit;
+ this->layer.ctrlcmd = cfserl_ctrlcmd;
+ this->layer.type = type;
+ this->usestx = use_stx;
+ spin_lock_init(&this->sync);
+ snprintf(this->layer.name, CAIF_LAYER_NAME_SZ, "ser1");
+ return this;
+}
+
+void cfserl_set_uplayer(struct cfserl *this, struct cflayer *up)
+{
+ this->layer.up = up;
+}
+
+void cfserl_set_dnlayer(struct cfserl *this, struct cflayer *dn)
+{
+ this->layer.dn = dn;
+}
+
+static int cfserl_receive(struct cflayer *l, struct cfpkt *newpkt)
+{
+ struct cfserl *layr = container_obj(l);
+ u16 pkt_len;
+ struct cfpkt *pkt = NULL;
+ struct cfpkt *tail_pkt = NULL;
+ u8 tmp8;
+ u16 tmp;
+ u8 stx = CFSERL_STX;
+ int ret;
+ u16 expectlen = 0;
+ caif_assert(newpkt != NULL);
+ spin_lock(&layr->sync);
+
+ if (layr->incomplete_frm != NULL) {
+
+ layr->incomplete_frm =
+ cfpkt_append(layr->incomplete_frm, newpkt, expectlen);
+ pkt = layr->incomplete_frm;
+ } else {
+ pkt = newpkt;
+ }
+ layr->incomplete_frm = NULL;
+
+ do {
+ /* Search for STX at start of pkt if STX is used */
+ if (layr->usestx) {
+ cfpkt_extr_head(pkt, &tmp8, 1);
+ if (tmp8 != CFSERL_STX) {
+ while (cfpkt_more(pkt)
+ && tmp8 != CFSERL_STX) {
+ cfpkt_extr_head(pkt, &tmp8, 1);
+ }
+ if (!cfpkt_more(pkt)) {
+ cfpkt_destroy(pkt);
+ layr->incomplete_frm = NULL;
+ spin_unlock(&layr->sync);
+ return -EPROTO;
+ }
+ }
+ }
+
+ pkt_len = cfpkt_getlen(pkt);
+
+ /*
+ * pkt_len is the accumulated length of the packet data
+ * we have received so far.
+ * Exit if frame doesn't hold length.
+ */
+
+ if (pkt_len < 2) {
+ if (layr->usestx)
+ cfpkt_add_head(pkt, &stx, 1);
+ layr->incomplete_frm = pkt;
+ spin_unlock(&layr->sync);
+ return 0;
+ }
+
+ /*
+ * Find length of frame.
+ * expectlen is the length we need for a full frame.
+ */
+ cfpkt_peek_head(pkt, &tmp, 2);
+ expectlen = le16_to_cpu(tmp) + 2;
+ /*
+ * Frame error handling
+ */
+ if (expectlen < CAIF_MINIUM_PACKET_SIZE
+ || expectlen > CAIF_MAX_FRAMESIZE) {
+ if (!layr->usestx) {
+ if (pkt != NULL)
+ cfpkt_destroy(pkt);
+ layr->incomplete_frm = NULL;
+ expectlen = 0;
+ spin_unlock(&layr->sync);
+ return -EPROTO;
+ }
+ continue;
+ }
+
+ if (pkt_len < expectlen) {
+ /* Too little received data */
+ if (layr->usestx)
+ cfpkt_add_head(pkt, &stx, 1);
+ layr->incomplete_frm = pkt;
+ spin_unlock(&layr->sync);
+ return 0;
+ }
+
+ /*
+ * Enough data for at least one frame.
+ * Split the frame, if too long
+ */
+ if (pkt_len > expectlen)
+ tail_pkt = cfpkt_split(pkt, expectlen);
+ else
+ tail_pkt = NULL;
+
+ /* Send the first part of packet upwards.*/
+ spin_unlock(&layr->sync);
+ ret = layr->layer.up->receive(layr->layer.up, pkt);
+ spin_lock(&layr->sync);
+ if (ret == -EILSEQ) {
+ if (layr->usestx) {
+ if (tail_pkt != NULL)
+ pkt = cfpkt_append(pkt, tail_pkt, 0);
+
+ /* Start search for next STX if frame failed */
+ continue;
+ } else {
+ cfpkt_destroy(pkt);
+ pkt = NULL;
+ }
+ }
+
+ pkt = tail_pkt;
+
+ } while (pkt != NULL);
+
+ spin_unlock(&layr->sync);
+ return 0;
+}
+
+static int cfserl_transmit(struct cflayer *layer, struct cfpkt *newpkt)
+{
+ struct cfserl *layr = container_obj(layer);
+ int ret;
+ u8 tmp8 = CFSERL_STX;
+ if (layr->usestx)
+ cfpkt_add_head(newpkt, &tmp8, 1);
+ ret = layer->dn->transmit(layer->dn, newpkt);
+ if (ret < 0)
+ cfpkt_extr_head(newpkt, &tmp8, 1);
+
+ return ret;
+}
+
+static void cfserl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid)
+{
+ layr->up->ctrlcmd(layr->up, ctrl, phyid);
+}
diff --git a/net/caif/cfsrvl.c b/net/caif/cfsrvl.c
new file mode 100644
index 0000000..d470c51
--- /dev/null
+++ b/net/caif/cfsrvl.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfsrvl.h>
+#include <net/caif/cfpkt.h>
+
+#define SRVL_CTRL_PKT_SIZE 1
+#define SRVL_FLOW_OFF 0x81
+#define SRVL_FLOW_ON 0x80
+#define SRVL_SET_PIN 0x82
+#define SRVL_CTRL_PKT_SIZE 1
+
+#define container_obj(layr) container_of(layr, struct cfsrvl, layer)
+
+static void cfservl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid)
+{
+ struct cfsrvl *service = container_obj(layr);
+ caif_assert(layr->up != NULL);
+ caif_assert(layr->up->ctrlcmd != NULL);
+ switch (ctrl) {
+ case CAIF_CTRLCMD_INIT_RSP:
+ service->open = true;
+ layr->up->ctrlcmd(layr->up, ctrl, phyid);
+ break;
+ case CAIF_CTRLCMD_DEINIT_RSP:
+ case CAIF_CTRLCMD_INIT_FAIL_RSP:
+ service->open = false;
+ layr->up->ctrlcmd(layr->up, ctrl, phyid);
+ break;
+ case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND:
+ if (phyid != service->dev_info.id)
+ break;
+ if (service->modem_flow_on)
+ layr->up->ctrlcmd(layr->up,
+ CAIF_CTRLCMD_FLOW_OFF_IND, phyid);
+ service->phy_flow_on = false;
+ break;
+ case _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND:
+ if (phyid != service->dev_info.id)
+ return;
+ if (service->modem_flow_on) {
+ layr->up->ctrlcmd(layr->up,
+ CAIF_CTRLCMD_FLOW_ON_IND,
+ phyid);
+ }
+ service->phy_flow_on = true;
+ break;
+ case CAIF_CTRLCMD_FLOW_OFF_IND:
+ if (service->phy_flow_on) {
+ layr->up->ctrlcmd(layr->up,
+ CAIF_CTRLCMD_FLOW_OFF_IND, phyid);
+ }
+ service->modem_flow_on = false;
+ break;
+ case CAIF_CTRLCMD_FLOW_ON_IND:
+ if (service->phy_flow_on) {
+ layr->up->ctrlcmd(layr->up,
+ CAIF_CTRLCMD_FLOW_ON_IND, phyid);
+ }
+ service->modem_flow_on = true;
+ break;
+ case _CAIF_CTRLCMD_PHYIF_DOWN_IND:
+ /* In case interface is down, let's fake a remove shutdown */
+ layr->up->ctrlcmd(layr->up,
+ CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, phyid);
+ break;
+ case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
+ layr->up->ctrlcmd(layr->up, ctrl, phyid);
+ break;
+ default:
+ pr_warning("CAIF: %s(): "
+ "Unexpected ctrl in cfsrvl (%d)\n", __func__, ctrl);
+ /* We have both modem and phy flow on, send flow on */
+ layr->up->ctrlcmd(layr->up, ctrl, phyid);
+ service->phy_flow_on = true;
+ break;
+ }
+}
+
+static int cfservl_modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl)
+{
+ struct cfsrvl *service = container_obj(layr);
+ caif_assert(layr != NULL);
+ caif_assert(layr->dn != NULL);
+ caif_assert(layr->dn->transmit != NULL);
+ switch (ctrl) {
+ case CAIF_MODEMCMD_FLOW_ON_REQ:
+ {
+ struct cfpkt *pkt;
+ struct caif_payload_info *info;
+ u8 flow_on = SRVL_FLOW_ON;
+ pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE);
+ if (!pkt) {
+ pr_warning("CAIF: %s(): Out of memory\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ if (cfpkt_add_head(pkt, &flow_on, 1) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n",
+ __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+ info = cfpkt_info(pkt);
+ info->channel_id = service->layer.id;
+ info->hdr_len = 1;
+ info->dev_info = &service->dev_info;
+ return layr->dn->transmit(layr->dn, pkt);
+ }
+ case CAIF_MODEMCMD_FLOW_OFF_REQ:
+ {
+ struct cfpkt *pkt;
+ struct caif_payload_info *info;
+ u8 flow_off = SRVL_FLOW_OFF;
+ pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE);
+ if (cfpkt_add_head(pkt, &flow_off, 1) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n",
+ __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+ info = cfpkt_info(pkt);
+ info->channel_id = service->layer.id;
+ info->hdr_len = 1;
+ info->dev_info = &service->dev_info;
+ return layr->dn->transmit(layr->dn, pkt);
+ }
+ default:
+ break;
+ }
+ return -EINVAL;
+}
+
+void cfservl_destroy(struct cflayer *layer)
+{
+ kfree(layer);
+}
+
+void cfsrvl_init(struct cfsrvl *service,
+ u8 channel_id,
+ struct dev_info *dev_info)
+{
+ caif_assert(offsetof(struct cfsrvl, layer) == 0);
+ service->open = false;
+ service->modem_flow_on = true;
+ service->phy_flow_on = true;
+ service->layer.id = channel_id;
+ service->layer.ctrlcmd = cfservl_ctrlcmd;
+ service->layer.modemcmd = cfservl_modemcmd;
+ service->dev_info = *dev_info;
+}
+
+bool cfsrvl_ready(struct cfsrvl *service, int *err)
+{
+ if (service->open && service->modem_flow_on && service->phy_flow_on)
+ return true;
+ if (!service->open) {
+ *err = -ENOTCONN;
+ return false;
+ }
+ caif_assert(!(service->modem_flow_on && service->phy_flow_on));
+ *err = -EAGAIN;
+ return false;
+}
+u8 cfsrvl_getphyid(struct cflayer *layer)
+{
+ struct cfsrvl *servl = container_obj(layer);
+ return servl->dev_info.id;
+}
+
+bool cfsrvl_phyid_match(struct cflayer *layer, int phyid)
+{
+ struct cfsrvl *servl = container_obj(layer);
+ return servl->dev_info.id == phyid;
+}
diff --git a/net/caif/cfutill.c b/net/caif/cfutill.c
new file mode 100644
index 0000000..5fd2c9e
--- /dev/null
+++ b/net/caif/cfutill.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfsrvl.h>
+#include <net/caif/cfpkt.h>
+
+#define container_obj(layr) ((struct cfsrvl *) layr)
+#define UTIL_PAYLOAD 0x00
+#define UTIL_CMD_BIT 0x80
+#define UTIL_REMOTE_SHUTDOWN 0x82
+#define UTIL_FLOW_OFF 0x81
+#define UTIL_FLOW_ON 0x80
+#define UTIL_CTRL_PKT_SIZE 1
+static int cfutill_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cfutill_transmit(struct cflayer *layr, struct cfpkt *pkt);
+
+struct cflayer *cfutill_create(u8 channel_id, struct dev_info *dev_info)
+{
+ struct cfsrvl *util = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
+ if (!util) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cfsrvl, layer) == 0);
+ memset(util, 0, sizeof(struct cfsrvl));
+ cfsrvl_init(util, channel_id, dev_info);
+ util->layer.receive = cfutill_receive;
+ util->layer.transmit = cfutill_transmit;
+ snprintf(util->layer.name, CAIF_LAYER_NAME_SZ - 1, "util1");
+ return &util->layer;
+}
+
+static int cfutill_receive(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u8 cmd = -1;
+ struct cfsrvl *service = container_obj(layr);
+ caif_assert(layr != NULL);
+ caif_assert(layr->up != NULL);
+ caif_assert(layr->up->receive != NULL);
+ caif_assert(layr->up->ctrlcmd != NULL);
+ if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+
+ switch (cmd) {
+ case UTIL_PAYLOAD:
+ return layr->up->receive(layr->up, pkt);
+ case UTIL_FLOW_OFF:
+ layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
+ cfpkt_destroy(pkt);
+ return 0;
+ case UTIL_FLOW_ON:
+ layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
+ cfpkt_destroy(pkt);
+ return 0;
+ case UTIL_REMOTE_SHUTDOWN: /* Remote Shutdown Request */
+ pr_err("CAIF: %s(): REMOTE SHUTDOWN REQUEST RECEIVED\n",
+ __func__);
+ layr->ctrlcmd(layr, CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, 0);
+ service->open = false;
+ cfpkt_destroy(pkt);
+ return 0;
+ default:
+ cfpkt_destroy(pkt);
+ pr_warning("CAIF: %s(): Unknown service control %d (0x%x)\n",
+ __func__, cmd, cmd);
+ return -EPROTO;
+ }
+}
+
+static int cfutill_transmit(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u8 zero = 0;
+ struct caif_payload_info *info;
+ int ret;
+ struct cfsrvl *service = container_obj(layr);
+ caif_assert(layr != NULL);
+ caif_assert(layr->dn != NULL);
+ caif_assert(layr->dn->transmit != NULL);
+ if (!cfsrvl_ready(service, &ret))
+ return ret;
+
+ if (cfpkt_getlen(pkt) > CAIF_MAX_PAYLOAD_SIZE) {
+ pr_err("CAIF: %s(): packet too large size=%d\n",
+ __func__, cfpkt_getlen(pkt));
+ return -EOVERFLOW;
+ }
+
+ cfpkt_add_head(pkt, &zero, 1);
+ /* Add info for MUX-layer to route the packet out. */
+ info = cfpkt_info(pkt);
+ info->channel_id = service->layer.id;
+ /*
+ * To optimize alignment, we add up the size of CAIF header before
+ * payload.
+ */
+ info->hdr_len = 1;
+ info->dev_info = &service->dev_info;
+ ret = layr->dn->transmit(layr->dn, pkt);
+ if (ret < 0) {
+ u32 tmp32;
+ cfpkt_extr_head(pkt, &tmp32, 4);
+ }
+ return ret;
+}
diff --git a/net/caif/cfveil.c b/net/caif/cfveil.c
new file mode 100644
index 0000000..0fd827f
--- /dev/null
+++ b/net/caif/cfveil.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/stddef.h>
+#include <linux/slab.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfsrvl.h>
+#include <net/caif/cfpkt.h>
+
+#define VEI_PAYLOAD 0x00
+#define VEI_CMD_BIT 0x80
+#define VEI_FLOW_OFF 0x81
+#define VEI_FLOW_ON 0x80
+#define VEI_SET_PIN 0x82
+#define VEI_CTRL_PKT_SIZE 1
+#define container_obj(layr) container_of(layr, struct cfsrvl, layer)
+
+static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt);
+
+struct cflayer *cfvei_create(u8 channel_id, struct dev_info *dev_info)
+{
+ struct cfsrvl *vei = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
+ if (!vei) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cfsrvl, layer) == 0);
+ memset(vei, 0, sizeof(struct cfsrvl));
+ cfsrvl_init(vei, channel_id, dev_info);
+ vei->layer.receive = cfvei_receive;
+ vei->layer.transmit = cfvei_transmit;
+ snprintf(vei->layer.name, CAIF_LAYER_NAME_SZ - 1, "vei%d", channel_id);
+ return &vei->layer;
+}
+
+static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u8 cmd;
+ int ret;
+ caif_assert(layr->up != NULL);
+ caif_assert(layr->receive != NULL);
+ caif_assert(layr->ctrlcmd != NULL);
+
+
+ if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+ switch (cmd) {
+ case VEI_PAYLOAD:
+ ret = layr->up->receive(layr->up, pkt);
+ return ret;
+ case VEI_FLOW_OFF:
+ layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
+ cfpkt_destroy(pkt);
+ return 0;
+ case VEI_FLOW_ON:
+ layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
+ cfpkt_destroy(pkt);
+ return 0;
+ case VEI_SET_PIN: /* SET RS232 PIN */
+ cfpkt_destroy(pkt);
+ return 0;
+ default: /* SET RS232 PIN */
+ pr_warning("CAIF: %s():Unknown VEI control packet %d (0x%x)!\n",
+ __func__, cmd, cmd);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+}
+
+static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u8 tmp = 0;
+ struct caif_payload_info *info;
+ int ret;
+ struct cfsrvl *service = container_obj(layr);
+ if (!cfsrvl_ready(service, &ret))
+ return ret;
+ caif_assert(layr->dn != NULL);
+ caif_assert(layr->dn->transmit != NULL);
+ if (!cfpkt_getlen(pkt) > CAIF_MAX_PAYLOAD_SIZE) {
+ pr_warning("CAIF: %s(): Packet too large - size=%d\n",
+ __func__, cfpkt_getlen(pkt));
+ return -EOVERFLOW;
+ }
+
+ if (cfpkt_add_head(pkt, &tmp, 1) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ return -EPROTO;
+ }
+
+ /* Add info-> for MUX-layer to route the packet out. */
+ info = cfpkt_info(pkt);
+ info->channel_id = service->layer.id;
+ info->hdr_len = 1;
+ info->dev_info = &service->dev_info;
+ ret = layr->dn->transmit(layr->dn, pkt);
+ if (ret < 0)
+ cfpkt_extr_head(pkt, &tmp, 1);
+ return ret;
+}
diff --git a/net/caif/cfvidl.c b/net/caif/cfvidl.c
new file mode 100644
index 0000000..89ad4ea
--- /dev/null
+++ b/net/caif/cfvidl.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfsrvl.h>
+#include <net/caif/cfpkt.h>
+
+#define container_obj(layr) ((struct cfsrvl *) layr)
+
+static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt);
+static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt);
+
+struct cflayer *cfvidl_create(u8 channel_id, struct dev_info *dev_info)
+{
+ struct cfsrvl *vid = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
+ if (!vid) {
+ pr_warning("CAIF: %s(): Out of memory\n", __func__);
+ return NULL;
+ }
+ caif_assert(offsetof(struct cfsrvl, layer) == 0);
+
+ memset(vid, 0, sizeof(struct cfsrvl));
+ cfsrvl_init(vid, channel_id, dev_info);
+ vid->layer.receive = cfvidl_receive;
+ vid->layer.transmit = cfvidl_transmit;
+ snprintf(vid->layer.name, CAIF_LAYER_NAME_SZ - 1, "vid1");
+ return &vid->layer;
+}
+
+static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt)
+{
+ u32 videoheader;
+ if (cfpkt_extr_head(pkt, &videoheader, 4) < 0) {
+ pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
+ cfpkt_destroy(pkt);
+ return -EPROTO;
+ }
+ return layr->up->receive(layr->up, pkt);
+}
+
+static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt)
+{
+ struct cfsrvl *service = container_obj(layr);
+ struct caif_payload_info *info;
+ u32 videoheader = 0;
+ int ret;
+ if (!cfsrvl_ready(service, &ret))
+ return ret;
+ cfpkt_add_head(pkt, &videoheader, 4);
+ /* Add info for MUX-layer to route the packet out */
+ info = cfpkt_info(pkt);
+ info->channel_id = service->layer.id;
+ info->dev_info = &service->dev_info;
+ ret = layr->dn->transmit(layr->dn, pkt);
+ if (ret < 0)
+ cfpkt_extr_head(pkt, &videoheader, 4);
+ return ret;
+}
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 12/12] net-caif-driver: add CAIF serial driver (ldisc)
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-12-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Add CAIF Serial driver. This driver is implemented as a line discipline.
caif_serial uses the following module parameters:
ser_use_stx - specifies if STart of frame eXtension is in use.
ser_loop - sets the interface in loopback mode.
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
drivers/net/Kconfig | 2 +
drivers/net/Makefile | 1 +
drivers/net/caif/Kconfig | 24 ++
drivers/net/caif/Makefile | 14 ++
drivers/net/caif/caif_serial.c | 463 ++++++++++++++++++++++++++++++++++++++++
include/linux/tty.h | 4 +-
6 files changed, 506 insertions(+), 2 deletions(-)
create mode 100644 drivers/net/caif/Kconfig
create mode 100644 drivers/net/caif/Makefile
create mode 100644 drivers/net/caif/caif_serial.c
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index dd9a09c..c2e670c 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2789,6 +2789,8 @@ source "drivers/ieee802154/Kconfig"
source "drivers/s390/net/Kconfig"
+source "drivers/net/caif/Kconfig"
+
config XEN_NETDEV_FRONTEND
tristate "Xen network device frontend driver"
depends on XEN
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index ad1346d..b7ffa35 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -285,5 +285,6 @@ obj-$(CONFIG_VIRTIO_NET) += virtio_net.o
obj-$(CONFIG_SFC) += sfc/
obj-$(CONFIG_WIMAX) += wimax/
+obj-$(CONFIG_CAIF) += caif/
obj-$(CONFIG_OCTEON_MGMT_ETHERNET) += octeon/
diff --git a/drivers/net/caif/Kconfig b/drivers/net/caif/Kconfig
new file mode 100644
index 0000000..504b90a
--- /dev/null
+++ b/drivers/net/caif/Kconfig
@@ -0,0 +1,24 @@
+#
+# CAIF physical drivers
+#
+
+if CAIF
+
+comment "CAIF transport drivers"
+
+config CAIF_TTY
+ tristate "CAIF TTY transport driver"
+ default n
+ ---help---
+ The CAIF TTY transport driver.
+
+if CAIF_TTY
+config CAIF_TTY_NOFCS
+ bool "Don't use checksum for CAIF TTY transport driver"
+ default n
+ ---help---
+ If the CAIF transport driver is reliable checksumming is
+ not needed.
+endif # CAIF_TTY
+
+endif # CAIF
diff --git a/drivers/net/caif/Makefile b/drivers/net/caif/Makefile
new file mode 100644
index 0000000..01784a0
--- /dev/null
+++ b/drivers/net/caif/Makefile
@@ -0,0 +1,14 @@
+ifeq ($(CONFIG_CAIF_DEBUG),1)
+CAIF_DBG_FLAGS := -DDEBUG
+endif
+
+KBUILD_EXTRA_SYMBOLS=net/caif/Module.symvers
+
+ccflags-y := $(CAIF_FLAGS) $(CAIF_DBG_FLAGS)
+clean-dirs:= .tmp_versions
+clean-files:= Module.symvers modules.order *.cmd *~ \
+
+# Serial interface
+obj-$(CONFIG_CAIF_TTY) += caif_serial.o
+
+
diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c
new file mode 100644
index 0000000..e5b19fa
--- /dev/null
+++ b/drivers/net/caif/caif_serial.c
@@ -0,0 +1,463 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland / sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/init.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/tty.h>
+#include <linux/file.h>
+#include <linux/if_arp.h>
+#include <net/caif/caif_device.h>
+#include <net/caif/cfcnfg.h>
+#include <linux/err.h>
+#include <linux/debugfs.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Sjur Brendeland<sjur.brandeland@stericsson.com>");
+MODULE_DESCRIPTION("CAIF serial device TTY line discipline");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_LDISC(N_CAIF);
+
+
+#define CAIF_SENDING 1 /* Bit 1 = 0x02*/
+#define CAIF_UART_TX_COMPLETED 2 /* Bit 2 = 0x04 */
+#define CAIF_FLOW_OFF_SENT 4 /* Bit 4 = 0x10 */
+
+#define MAX_WRITE_CHUNK 4096
+#define ON 1
+#define OFF 0
+#define CAIF_MAX_MTU 4096
+
+
+/*This list is protected by the rtnl lock. */
+static LIST_HEAD(ser_list);
+
+static int ser_loop;
+module_param(ser_loop, bool, S_IRUGO);
+MODULE_PARM_DESC(ser_loop, "Run in simulated loopback mode.");
+
+static int ser_use_stx = 1;
+module_param(ser_use_stx, bool, S_IRUGO);
+MODULE_PARM_DESC(ser_use_stx, "STX enabled or not.");
+
+static int ser_use_fcs = 1;
+
+module_param(ser_use_fcs, bool, S_IRUGO);
+MODULE_PARM_DESC(ser_use_fcs, "FCS enabled or not.");
+
+static int ser_write_chunk = MAX_WRITE_CHUNK;
+module_param(ser_write_chunk, int, S_IRUGO);
+
+MODULE_PARM_DESC(ser_write_chunk, "Maximum size of data written to UART.");
+
+static struct dentry *debugfsdir;
+
+static int caif_net_open(struct net_device *dev);
+static int caif_net_close(struct net_device *dev);
+
+struct ser_device {
+ struct caif_dev_common common;
+ struct list_head node;
+ struct net_device *dev;
+ struct sk_buff_head head;
+ struct tty_struct *tty;
+ bool tx_started;
+ unsigned long state;
+ char *tty_name;
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *debugfs_tty_dir;
+ struct debugfs_blob_wrapper tx_blob;
+ struct debugfs_blob_wrapper rx_blob;
+ u8 rx_data[128];
+ u8 tx_data[128];
+ u8 tty_status;
+
+#endif
+};
+
+static int ser_phy_tx(struct ser_device *ser, struct sk_buff *skb);
+static void caifdev_setup(struct net_device *dev);
+static void ldisc_tx_wakeup(struct tty_struct *tty);
+#ifdef CONFIG_DEBUG_FS
+static inline void update_tty_status(struct ser_device *ser)
+{
+ ser->tty_status =
+ ser->tty->stopped << 5 |
+ ser->tty->hw_stopped << 4 |
+ ser->tty->flow_stopped << 3 |
+ ser->tty->packet << 2 |
+ ser->tty->low_latency << 1 |
+ ser->tty->warned;
+}
+static inline void debugfs_init(struct ser_device *ser, struct tty_struct *tty)
+{
+ ser->debugfs_tty_dir =
+ debugfs_create_dir(tty->name, debugfsdir);
+ if (!IS_ERR(ser->debugfs_tty_dir)) {
+ debugfs_create_blob("last_tx_msg", S_IRUSR,
+ ser->debugfs_tty_dir,
+ &ser->tx_blob);
+
+ debugfs_create_blob("last_rx_msg", S_IRUSR,
+ ser->debugfs_tty_dir,
+ &ser->rx_blob);
+
+ debugfs_create_x32("ser_state", S_IRUSR,
+ ser->debugfs_tty_dir,
+ (u32 *)&ser->state);
+
+ debugfs_create_x8("tty_status", S_IRUSR,
+ ser->debugfs_tty_dir,
+ &ser->tty_status);
+
+ }
+ ser->tx_blob.data = ser->tx_data;
+ ser->tx_blob.size = 0;
+ ser->rx_blob.data = ser->rx_data;
+ ser->rx_blob.size = 0;
+}
+
+static inline void debugfs_deinit(struct ser_device *ser)
+{
+ debugfs_remove_recursive(ser->debugfs_tty_dir);
+}
+
+static inline void debugfs_rx(struct ser_device *ser, const u8 *data, int size)
+{
+ if (size > sizeof(ser->rx_data))
+ size = sizeof(ser->rx_data);
+ memcpy(ser->rx_data, data, size);
+ ser->rx_blob.data = ser->rx_data;
+ ser->rx_blob.size = size;
+}
+
+static inline void debugfs_tx(struct ser_device *ser, const u8 *data, int size)
+{
+ if (size > sizeof(ser->tx_data))
+ size = sizeof(ser->tx_data);
+ memcpy(ser->tx_data, data, size);
+ ser->tx_blob.data = ser->tx_data;
+ ser->tx_blob.size = size;
+}
+#else
+static inline void debugfs_init(struct ser_device *ser, struct tty_struct *tty)
+{
+}
+
+static inline void debugfs_deinit(struct ser_device *ser)
+{
+}
+
+static inline void update_tty_status(struct ser_device *ser)
+{
+}
+
+static inline void debugfs_rx(struct ser_device *ser, const u8 *data, int size)
+{
+}
+
+static inline void debugfs_tx(struct ser_device *ser, const u8 *data, int size)
+{
+}
+
+#endif
+
+static void ldisc_receive(struct tty_struct *tty, const u8 *data,
+ char *flags, int count)
+{
+ struct sk_buff *skb = NULL;
+ struct ser_device *ser;
+ int ret;
+ u8 *p;
+ ser = tty->disc_data;
+
+ /*
+ * Workaround for garbage at start of transmission,
+ * only enable if STX handling is not enables
+ */
+ if (!ser->common.use_stx && !ser->tx_started) {
+ dev_info(&ser->dev->dev,
+ "Bytes received before initial transmission -"
+ "bytes discarded.\n");
+ return;
+ }
+
+ BUG_ON(ser->dev == NULL);
+
+ /* Get a suitable caif packet and copy in data. */
+ skb = netdev_alloc_skb(ser->dev, count+1);
+ BUG_ON(skb == NULL);
+ p = skb_put(skb, count);
+ memcpy(p, data, count);
+
+ skb->protocol = htons(ETH_P_CAIF);
+ skb_reset_mac_header(skb);
+ skb->dev = ser->dev;
+ debugfs_rx(ser, data, count);
+ /* Push received packet up the stack. */
+ ret = netif_rx(skb);
+ if (!ret) {
+ ser->dev->stats.rx_packets++;
+ ser->dev->stats.rx_bytes += count;
+ } else
+ ++ser->dev->stats.rx_dropped;
+ update_tty_status(ser);
+}
+
+static int handle_tx(struct ser_device *ser)
+{
+ struct tty_struct *tty;
+ struct sk_buff *skb;
+ char *buf;
+ int tty_wr, len, room, pktlen;
+ tty = ser->tty;
+
+ /*
+ * NOTE: This workaround is not really needed when STX is enabled.
+ * Remove?
+ */
+ if (ser->tx_started == false)
+ ser->tx_started = true;
+
+ if (test_and_set_bit(CAIF_SENDING, &ser->state)) {
+ set_bit(CAIF_UART_TX_COMPLETED, &ser->state);
+ return 0;
+ }
+
+ do {
+ skb = skb_peek(&ser->head);
+ if (skb != NULL && skb->len == 0) {
+ struct sk_buff *tmp;
+ tmp = skb_dequeue(&ser->head);
+ BUG_ON(tmp != skb);
+ kfree_skb(skb);
+ skb = skb_peek(&ser->head);
+ }
+
+ if (skb == NULL) {
+ if (test_and_clear_bit(
+ CAIF_FLOW_OFF_SENT,
+ &ser->state)) {
+ if (ser->common.flowctrl != NULL)
+ ser->common.flowctrl(ser->dev, ON);
+ }
+ break;
+ }
+
+
+ buf = skb->data;
+ pktlen = len = skb->len;
+
+ clear_bit(CAIF_UART_TX_COMPLETED, &ser->state);
+ room = tty_write_room(tty);
+ if (room > ser_write_chunk)
+ room = ser_write_chunk;
+
+ if (len > room)
+ len = room;
+ debugfs_tx(ser, buf, len);
+ if (!ser_loop) {
+ tty_wr = tty->ops->write(tty, buf, len);
+ } else {
+ tty_wr = len;
+ ldisc_receive(tty, buf, 0, len);
+ }
+ ser->dev->stats.tx_packets++;
+ ser->dev->stats.tx_bytes += tty_wr;
+ if (tty_wr > 0)
+ skb_pull(skb, tty_wr);
+
+ if (ser_loop)
+ ldisc_tx_wakeup(tty);
+ update_tty_status(ser);
+
+ } while (test_bit(CAIF_UART_TX_COMPLETED, &(ser->state)));
+
+ clear_bit(CAIF_SENDING, &ser->state);
+ return 0;
+}
+
+static int ser_phy_tx(struct ser_device *ser, struct sk_buff *skb)
+{
+ if (skb_peek(&ser->head) != NULL) {
+ if (!test_and_set_bit(CAIF_FLOW_OFF_SENT, &ser->state)
+ && ser->common.flowctrl != NULL)
+ ser->common.flowctrl(ser->dev, OFF);
+ }
+ skb_queue_tail(&ser->head, skb);
+ if (!test_bit(CAIF_SENDING, &ser->state))
+ handle_tx(ser);
+ update_tty_status(ser);
+ return 0;
+}
+
+static int caif_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ser_device *ser;
+ if (!dev)
+ return -EINVAL;
+ ser = netdev_priv(dev);
+ return ser_phy_tx(ser, skb);
+}
+
+
+static void ldisc_tx_wakeup(struct tty_struct *tty)
+{
+ struct ser_device *ser;
+ ser = tty->disc_data;
+ if (ser == NULL)
+ return;
+ set_bit(CAIF_UART_TX_COMPLETED, &ser->state);
+ if (ser->tty != tty)
+ return;
+ handle_tx(ser);
+}
+
+
+static int ldisc_open(struct tty_struct *tty)
+{
+ struct ser_device *ser;
+ struct net_device *dev;
+ char name[64];
+ int result;
+
+ sprintf(name, "caif_%s", tty->name);
+
+ dev = alloc_netdev(sizeof(*ser), name, caifdev_setup);
+
+
+ ser = netdev_priv(dev);
+ ser->tty = tty;
+ ser->dev = dev;
+ debugfs_init(ser, tty);
+ tty->receive_room = N_TTY_BUF_SIZE;
+ tty->disc_data = ser;
+
+ set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+ rtnl_lock();
+ result = register_netdevice(dev);
+ if (result) {
+ rtnl_unlock();
+ free_netdev(dev);
+ return -ENODEV;
+ }
+
+ list_add(&ser->node, &ser_list);
+ rtnl_unlock();
+ netif_stop_queue(dev);
+ update_tty_status(ser);
+ return 0;
+}
+
+static void ldisc_close(struct tty_struct *tty)
+{
+ struct ser_device *ser = tty->disc_data;
+ /* Remove may be called inside or outside of rtnl_lock */
+ int islocked = rtnl_is_locked();
+ if (!islocked)
+ rtnl_lock();
+ /* device is freed automagically by net-sysfs */
+ dev_close(ser->dev);
+ unregister_netdevice(ser->dev);
+ list_del(&ser->node);
+ debugfs_deinit(ser);
+ if (!islocked)
+ rtnl_unlock();
+}
+
+/* The line discipline structure. */
+static struct tty_ldisc_ops caif_ldisc = {
+ .owner = THIS_MODULE,
+ .magic = TTY_LDISC_MAGIC,
+ .name = "n_caif",
+ .open = ldisc_open,
+ .close = ldisc_close,
+ .receive_buf = ldisc_receive,
+ .write_wakeup = ldisc_tx_wakeup
+};
+
+static int register_ldisc(void)
+{
+ int result;
+ result = tty_register_ldisc(N_CAIF, &caif_ldisc);
+ if (result < 0) {
+ pr_err("cannot register CAIF ldisc=%d err=%d\n", N_CAIF,
+ result);
+ return result;
+ }
+ return result;
+}
+
+static const struct net_device_ops netdev_ops = {
+ .ndo_open = caif_net_open,
+ .ndo_stop = caif_net_close,
+ .ndo_start_xmit = caif_xmit
+};
+static void caifdev_setup(struct net_device *dev)
+{
+ struct ser_device *serdev = netdev_priv(dev);
+ dev->features = 0;
+
+ dev->netdev_ops = &netdev_ops;
+
+ dev->type = ARPHRD_CAIF;
+ dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_POINTOPOINT;
+ dev->mtu = CAIF_MAX_MTU;
+ dev->hard_header_len = CAIF_NEEDED_HEADROOM;
+ dev->tx_queue_len = 0;
+ dev->destructor = free_netdev;
+ skb_queue_head_init(&serdev->head);
+ serdev->common.link_select = CAIF_LINK_LOW_LATENCY;
+ serdev->common.use_frag = true;
+ serdev->common.use_stx = ser_use_stx;
+ serdev->common.use_fcs = ser_use_fcs;
+ serdev->dev = dev;
+}
+
+static int caif_net_open(struct net_device *dev)
+{
+ struct ser_device *ser;
+ ser = netdev_priv(dev);
+ netif_wake_queue(dev);
+ return 0;
+}
+
+static int caif_net_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+static int __init caif_ser_init(void)
+{
+ int ret;
+ ret = register_ldisc();
+ debugfsdir = debugfs_create_dir("caif_serial", NULL);
+ return ret;
+}
+
+static void __exit caif_ser_exit(void)
+{
+ struct ser_device *ser = NULL;
+ struct list_head *node;
+ struct list_head *_tmp;
+ list_for_each_safe(node, _tmp, &ser_list) {
+ ser = list_entry(node, struct ser_device, node);
+ dev_close(ser->dev);
+ unregister_netdevice(ser->dev);
+ list_del(node);
+ }
+ tty_unregister_ldisc(N_CAIF);
+ debugfs_remove_recursive(debugfsdir);
+}
+
+module_init(caif_ser_init);
+module_exit(caif_ser_exit);
diff --git a/include/linux/tty.h b/include/linux/tty.h
index ef3a294..5dd674b 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -23,7 +23,7 @@
*/
#define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
-#define NR_LDISCS 20
+#define NR_LDISCS 21
/* line disciplines */
#define N_TTY 0
@@ -46,8 +46,8 @@
#define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
#define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */
#define N_PPS 18 /* Pulse per Second */
-
#define N_V253 19 /* Codec control over voice modem */
+#define N_CAIF 20 /* CAIF protocol for talking to modems */
/*
* This character is the same as _POSIX_VDISABLE: it cannot be used as
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 08/12] net-caif: add CAIF socket implementation
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-8-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Implementation of CAIF sockets for protocol and address family
PF_CAIF and AF_CAIF.
CAIF socket is connection oriented implementing SOCK_SEQPACKET
interface with supporting blocking and non-blocking mode.
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
net/caif/caif_socket.c | 1431 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 1431 insertions(+), 0 deletions(-)
diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c
new file mode 100644
index 0000000..d499e19
--- /dev/null
+++ b/net/caif/caif_socket.c
@@ -0,0 +1,1431 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland sjur.brandeland@stericsson.com
+ * Per Sigmond per.sigmond@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
+#include <linux/tcp.h>
+#include <linux/uaccess.h>
+#include <asm/atomic.h>
+
+#include <linux/caif/caif_socket.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/caif_dev.h>
+#include <net/caif/cfpkt.h>
+
+MODULE_LICENSE("GPL");
+
+
+#define CHNL_SKT_READ_QUEUE_HIGH 200
+#define CHNL_SKT_READ_QUEUE_LOW 100
+
+int caif_sockbuf_size = 40000;
+static struct kmem_cache *caif_sk_cachep;
+static atomic_t caif_nr_socks = ATOMIC_INIT(0);
+
+#define CONN_STATE_OPEN_BIT 1
+#define CONN_STATE_PENDING_BIT 2
+#define CONN_STATE_PEND_DESTROY_BIT 3
+#define CONN_REMOTE_SHUTDOWN_BIT 4
+
+#define TX_FLOW_ON_BIT 1
+#define RX_FLOW_ON_BIT 2
+
+#define STATE_IS_OPEN(cf_sk) test_bit(CONN_STATE_OPEN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define STATE_IS_REMOTE_SHUTDOWN(cf_sk) test_bit(CONN_REMOTE_SHUTDOWN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define STATE_IS_PENDING(cf_sk) test_bit(CONN_STATE_PENDING_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define STATE_IS_PENDING_DESTROY(cf_sk) test_bit(CONN_STATE_PEND_DESTROY_BIT,\
+ (void *) &(cf_sk)->conn_state)
+
+#define SET_STATE_PENDING_DESTROY(cf_sk) set_bit(CONN_STATE_PEND_DESTROY_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_STATE_OPEN(cf_sk) set_bit(CONN_STATE_OPEN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_STATE_CLOSED(cf_sk) clear_bit(CONN_STATE_OPEN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_PENDING_ON(cf_sk) set_bit(CONN_STATE_PENDING_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_PENDING_OFF(cf_sk) clear_bit(CONN_STATE_PENDING_BIT,\
+ (void *) &(cf_sk)->conn_state)
+#define SET_REMOTE_SHUTDOWN(cf_sk) set_bit(CONN_REMOTE_SHUTDOWN_BIT,\
+ (void *) &(cf_sk)->conn_state)
+
+#define SET_REMOTE_SHUTDOWN_OFF(dev) clear_bit(CONN_REMOTE_SHUTDOWN_BIT,\
+ (void *) &(dev)->conn_state)
+#define RX_FLOW_IS_ON(cf_sk) test_bit(RX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+#define TX_FLOW_IS_ON(cf_sk) test_bit(TX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+
+#define SET_RX_FLOW_OFF(cf_sk) clear_bit(RX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+#define SET_RX_FLOW_ON(cf_sk) set_bit(RX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+#define SET_TX_FLOW_OFF(cf_sk) clear_bit(TX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+#define SET_TX_FLOW_ON(cf_sk) set_bit(TX_FLOW_ON_BIT,\
+ (void *) &(cf_sk)->flow_state)
+
+#define SKT_READ_FLAG 0x01
+#define SKT_WRITE_FLAG 0x02
+static struct dentry *debugfsdir;
+#include <linux/debugfs.h>
+
+#ifdef CONFIG_DEBUG_FS
+struct debug_fs_counter {
+ atomic_t num_open;
+ atomic_t num_close;
+ atomic_t num_init;
+ atomic_t num_init_resp;
+ atomic_t num_init_fail_resp;
+ atomic_t num_deinit;
+ atomic_t num_deinit_resp;
+ atomic_t num_remote_shutdown_ind;
+ atomic_t num_tx_flow_off_ind;
+ atomic_t num_tx_flow_on_ind;
+ atomic_t num_rx_flow_off;
+ atomic_t num_rx_flow_on;
+ atomic_t skb_in_use;
+ atomic_t skb_alloc;
+ atomic_t skb_free;
+};
+struct debug_fs_counter cnt;
+#define dbfs_atomic_inc(v) atomic_inc(v)
+#define dbfs_atomic_dec(v) atomic_dec(v)
+#else
+#define dbfs_atomic_inc(v)
+#define dbfs_atomic_dec(v)
+#endif
+
+/* The AF_CAIF socket */
+struct caifsock {
+ /* NOTE: sk has to be the first member */
+ struct sock sk;
+ struct cflayer layer;
+ char name[CAIF_LAYER_NAME_SZ];
+ u32 conn_state;
+ u32 flow_state;
+ struct cfpktq *pktq;
+ int file_mode;
+ struct caif_connect_request conn_req;
+ int read_queue_len;
+ spinlock_t read_queue_len_lock;
+ struct dentry *debugfs_socket_dir;
+};
+
+static void drain_queue(struct caifsock *cf_sk);
+
+/* Packet Receive Callback function called from CAIF Stack */
+static int caif_sktrecv_cb(struct cflayer *layr, struct cfpkt *pkt)
+{
+ struct caifsock *cf_sk;
+ int read_queue_high;
+ cf_sk = container_of(layr, struct caifsock, layer);
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /*FIXME: This should be allowed finally!*/
+ pr_debug("CAIF: %s(): called after close request\n", __func__);
+ cfpkt_destroy(pkt);
+ return 0;
+ }
+ /* NOTE: This function may be called in Tasklet context! */
+
+ /* The queue has its own lock */
+ cfpkt_queue(cf_sk->pktq, pkt, 0);
+
+ spin_lock(&cf_sk->read_queue_len_lock);
+ cf_sk->read_queue_len++;
+
+ read_queue_high = (cf_sk->read_queue_len > CHNL_SKT_READ_QUEUE_HIGH);
+ spin_unlock(&cf_sk->read_queue_len_lock);
+
+ if (RX_FLOW_IS_ON(cf_sk) && read_queue_high) {
+ dbfs_atomic_inc(&cnt.num_rx_flow_off);
+ SET_RX_FLOW_OFF(cf_sk);
+
+ /* Send flow off (NOTE: must not sleep) */
+ pr_debug("CAIF: %s():"
+ " sending flow OFF (queue len = %d)\n",
+ __func__,
+ cf_sk->read_queue_len);
+ caif_assert(cf_sk->layer.dn);
+ caif_assert(cf_sk->layer.dn->ctrlcmd);
+
+ (void) cf_sk->layer.dn->modemcmd(cf_sk->layer.dn,
+ CAIF_MODEMCMD_FLOW_OFF_REQ);
+ }
+
+ /* Signal reader that data is available. */
+
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+
+ return 0;
+}
+
+/* Packet Flow Control Callback function called from CAIF */
+static void caif_sktflowctrl_cb(struct cflayer *layr,
+ enum caif_ctrlcmd flow,
+ int phyid)
+{
+ struct caifsock *cf_sk;
+
+ /* NOTE: This function may be called in Tasklet context! */
+ pr_debug("CAIF: %s(): flowctrl func called: %s.\n",
+ __func__,
+ flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" :
+ flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" :
+ flow == CAIF_CTRLCMD_INIT_RSP ? "INIT_RSP" :
+ flow == CAIF_CTRLCMD_DEINIT_RSP ? "DEINIT_RSP" :
+ flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "INIT_FAIL_RSP" :
+ flow ==
+ CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ? "REMOTE_SHUTDOWN" :
+ "UKNOWN CTRL COMMAND");
+
+ cf_sk = container_of(layr, struct caifsock, layer);
+ switch (flow) {
+ case CAIF_CTRLCMD_FLOW_ON_IND:
+ dbfs_atomic_inc(&cnt.num_tx_flow_on_ind);
+ /* Signal reader that data is available. */
+ SET_TX_FLOW_ON(cf_sk);
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ case CAIF_CTRLCMD_FLOW_OFF_IND:
+ dbfs_atomic_inc(&cnt.num_tx_flow_off_ind);
+ SET_TX_FLOW_OFF(cf_sk);
+ break;
+
+ case CAIF_CTRLCMD_INIT_RSP:
+ dbfs_atomic_inc(&cnt.num_init_resp);
+ /* Signal reader that data is available. */
+ caif_assert(STATE_IS_OPEN(cf_sk));
+ SET_PENDING_OFF(cf_sk);
+ SET_TX_FLOW_ON(cf_sk);
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ case CAIF_CTRLCMD_DEINIT_RSP:
+ dbfs_atomic_inc(&cnt.num_deinit_resp);
+ caif_assert(!STATE_IS_OPEN(cf_sk));
+ SET_PENDING_OFF(cf_sk);
+ if (!STATE_IS_PENDING_DESTROY(cf_sk)) {
+ if (cf_sk->sk.sk_sleep != NULL)
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ }
+ dbfs_atomic_inc(&cnt.num_deinit);
+ sock_put(&cf_sk->sk);
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ case CAIF_CTRLCMD_INIT_FAIL_RSP:
+ dbfs_atomic_inc(&cnt.num_init_fail_resp);
+ caif_assert(STATE_IS_OPEN(cf_sk));
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_OFF(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
+ dbfs_atomic_inc(&cnt.num_remote_shutdown_ind);
+ SET_REMOTE_SHUTDOWN(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+ drain_queue(cf_sk);
+ SET_RX_FLOW_ON(cf_sk);
+ cf_sk->file_mode = 0;
+ wake_up_interruptible(cf_sk->sk.sk_sleep);
+ break;
+
+ default:
+ pr_debug("CAIF: %s(): Unexpected flow command %d\n",
+ __func__, flow);
+ }
+}
+
+static void skb_destructor(struct sk_buff *skb)
+{
+ dbfs_atomic_inc(&cnt.skb_free);
+ dbfs_atomic_dec(&cnt.skb_in_use);
+}
+
+
+static int caif_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *m, size_t buf_len, int flags)
+
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ struct cfpkt *pkt = NULL;
+ size_t len;
+ int result;
+ struct sk_buff *skb;
+ ssize_t ret = -EIO;
+ int read_queue_low;
+
+ if (cf_sk == NULL) {
+ pr_debug("CAIF: %s(): private_data not set!\n",
+ __func__);
+ ret = -EBADFD;
+ goto read_error;
+ }
+
+ /* Don't do multiple iovec entries yet */
+ if (m->msg_iovlen != 1)
+ return -EOPNOTSUPP;
+
+ if (unlikely(!buf_len))
+ return -EINVAL;
+
+ lock_sock(&(cf_sk->sk));
+
+ caif_assert(cf_sk->pktq);
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Socket is closed or closing. */
+ if (!STATE_IS_PENDING(cf_sk)) {
+ pr_debug("CAIF: %s(): socket is closed (by remote)\n",
+ __func__);
+ ret = -EPIPE;
+ } else {
+ pr_debug("CAIF: %s(): socket is closing..\n", __func__);
+ ret = -EBADF;
+ }
+ goto read_error;
+ }
+ /* Socket is open or opening. */
+ if (STATE_IS_PENDING(cf_sk)) {
+ pr_debug("CAIF: %s(): socket is opening...\n", __func__);
+
+ if (flags & MSG_DONTWAIT) {
+ /* We can't block. */
+ pr_debug("CAIF: %s():state pending and MSG_DONTWAIT\n",
+ __func__);
+ ret = -EAGAIN;
+ goto read_error;
+ }
+
+ /*
+ * Blocking mode; state is pending and we need to wait
+ * for its conclusion.
+ */
+ release_sock(&cf_sk->sk);
+
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ lock_sock(&(cf_sk->sk));
+
+ if (result == -ERESTARTSYS) {
+ pr_debug("CAIF: %s(): wait_event_interruptible"
+ " woken by a signal (1)", __func__);
+ ret = -ERESTARTSYS;
+ goto read_error;
+ }
+ }
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ pr_debug("CAIF: %s(): received remote_shutdown indication\n",
+ __func__);
+ ret = -ESHUTDOWN;
+ goto read_error;
+ }
+
+ /*
+ * Block if we don't have any received buffers.
+ * The queue has its own lock.
+ */
+ while ((pkt = cfpkt_qpeek(cf_sk->pktq)) == NULL) {
+
+ if (flags & MSG_DONTWAIT) {
+ pr_debug("CAIF: %s(): MSG_DONTWAIT\n", __func__);
+ ret = -EAGAIN;
+ goto read_error;
+ }
+ trace_printk("CAIF: %s() wait_event\n", __func__);
+
+ /* Let writers in. */
+ release_sock(&cf_sk->sk);
+
+ /* Block reader until data arrives or socket is closed. */
+ if (wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ cfpkt_qpeek(cf_sk->pktq)
+ || STATE_IS_REMOTE_SHUTDOWN(cf_sk)
+ || !STATE_IS_OPEN(cf_sk)) ==
+ -ERESTARTSYS) {
+ pr_debug("CAIF: %s():"
+ " wait_event_interruptible woken by "
+ "a signal, signal_pending(current) = %d\n",
+ __func__,
+ signal_pending(current));
+ return -ERESTARTSYS;
+ }
+
+ trace_printk("CAIF: %s() awake\n", __func__);
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ pr_debug("CAIF: %s(): "
+ "received remote_shutdown indication\n",
+ __func__);
+ ret = -ESHUTDOWN;
+ goto read_error_no_unlock;
+ }
+
+ /* I want to be alone on cf_sk (except status and queue). */
+ lock_sock(&(cf_sk->sk));
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Someone closed the link, report error. */
+ pr_debug("CAIF: %s(): remote end shutdown!\n",
+ __func__);
+ ret = -EPIPE;
+ goto read_error;
+ }
+ }
+
+ /* The queue has its own lock. */
+ len = cfpkt_getlen(pkt);
+
+ /* Check max length that can be copied. */
+ if (len > buf_len) {
+ pr_debug("CAIF: %s(): user buffer too small\n", __func__);
+ ret = -EINVAL;
+ goto read_error;
+ }
+
+ /*
+ * Get packet from queue.
+ * The queue has its own lock.
+ */
+ pkt = cfpkt_dequeue(cf_sk->pktq);
+
+ spin_lock(&cf_sk->read_queue_len_lock);
+ cf_sk->read_queue_len--;
+ read_queue_low = (cf_sk->read_queue_len < CHNL_SKT_READ_QUEUE_LOW);
+ spin_unlock(&cf_sk->read_queue_len_lock);
+
+ if (!RX_FLOW_IS_ON(cf_sk) && read_queue_low) {
+ dbfs_atomic_inc(&cnt.num_rx_flow_on);
+ SET_RX_FLOW_ON(cf_sk);
+
+ /* Send flow on. */
+ pr_debug("CAIF: %s(): sending flow ON (queue len = %d)\n",
+ __func__, cf_sk->read_queue_len);
+ caif_assert(cf_sk->layer.dn);
+ caif_assert(cf_sk->layer.dn->ctrlcmd);
+ (void) cf_sk->layer.dn->modemcmd(cf_sk->layer.dn,
+ CAIF_MODEMCMD_FLOW_ON_REQ);
+
+ caif_assert(cf_sk->read_queue_len >= 0);
+ }
+
+ skb = cfpkt_tonative(pkt);
+ result = skb_copy_datagram_iovec(skb, 0, m->msg_iov, len);
+ if (result) {
+ pr_debug("CAIF: %s(): cfpkt_raw_extract failed\n", __func__);
+ cfpkt_destroy(pkt);
+ ret = -EFAULT;
+ goto read_error;
+ }
+ if (unlikely(buf_len < len)) {
+ len = buf_len;
+ m->msg_flags |= MSG_TRUNC;
+ }
+
+ /* Free packet. */
+ skb_free_datagram(sk, skb);
+
+ /* Let the others in. */
+ release_sock(&cf_sk->sk);
+ return len;
+
+read_error:
+ release_sock(&cf_sk->sk);
+read_error_no_unlock:
+ return ret;
+}
+
+/* Send a signal as a consequence of sendmsg, sendto or caif_sendmsg. */
+static int caif_sendmsg(struct kiocb *kiocb, struct socket *sock,
+ struct msghdr *msg, size_t len)
+{
+
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ void *payload;
+ size_t payload_size = msg->msg_iov->iov_len;
+ struct cfpkt *pkt = NULL;
+ struct caif_payload_info info;
+ unsigned char *txbuf;
+ ssize_t ret = -EIO;
+ int result;
+ struct sk_buff *skb;
+ caif_assert(msg->msg_iovlen == 1);
+
+ if (cf_sk == NULL) {
+ pr_debug("CAIF: %s(): private_data not set!\n",
+ __func__);
+ ret = -EBADFD;
+ goto write_error_no_unlock;
+ }
+
+ if (unlikely(msg->msg_iov->iov_base == NULL)) {
+ pr_warning("CAIF: %s(): Buffer is NULL.\n", __func__);
+ ret = -EINVAL;
+ goto write_error_no_unlock;
+ }
+
+ payload = msg->msg_iov->iov_base;
+ if (payload_size > CAIF_MAX_PAYLOAD_SIZE) {
+ pr_debug("CAIF: %s(): buffer too long\n", __func__);
+ ret = -EINVAL;
+ goto write_error_no_unlock;
+ }
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ caif_assert(cf_sk->pktq);
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Socket is closed or closing */
+ if (!STATE_IS_PENDING(cf_sk)) {
+ pr_debug("CAIF: %s(): socket is closed (by remote)\n",
+ __func__);
+ ret = -EPIPE;
+ } else {
+ pr_debug("CAIF: %s(): socket is closing...\n",
+ __func__);
+ ret = -EBADF;
+ }
+ goto write_error;
+ }
+
+ /* Socket is open or opening */
+ if (STATE_IS_PENDING(cf_sk)) {
+ pr_debug("CAIF: %s(): socket is opening...\n", __func__);
+
+ if (msg->msg_flags & MSG_DONTWAIT) {
+ /* We can't block */
+ trace_printk("CAIF: %s():state pending:"
+ "state=MSG_DONTWAIT\n", __func__);
+ ret = -EAGAIN;
+ goto write_error;
+ }
+
+ /* Let readers in */
+ release_sock(&cf_sk->sk);
+
+ /*
+ * Blocking mode; state is pending and we need to wait
+ * for its conclusion.
+ */
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ if (result == -ERESTARTSYS) {
+ pr_debug("CAIF: %s(): wait_event_interruptible"
+ " woken by a signal (1)", __func__);
+ ret = -ERESTARTSYS;
+ goto write_error;
+ }
+ }
+
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ pr_debug("CAIF: %s(): received remote_shutdown indication\n",
+ __func__);
+ ret = -ESHUTDOWN;
+ goto write_error;
+ }
+
+ if (!TX_FLOW_IS_ON(cf_sk)) {
+
+ /* Flow is off. Check non-block flag */
+ if (msg->msg_flags & MSG_DONTWAIT) {
+ trace_printk("CAIF: %s(): MSG_DONTWAIT and tx flow off",
+ __func__);
+ ret = -EAGAIN;
+ goto write_error;
+ }
+
+ /* release lock before waiting */
+ release_sock(&cf_sk->sk);
+
+ /* Wait until flow is on or socket is closed */
+ if (wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ TX_FLOW_IS_ON(cf_sk)
+ || !STATE_IS_OPEN(cf_sk)
+ || STATE_IS_REMOTE_SHUTDOWN(cf_sk)
+ ) == -ERESTARTSYS) {
+ pr_debug("CAIF: %s():"
+ " wait_event_interruptible woken by a signal",
+ __func__);
+ ret = -ERESTARTSYS;
+ goto write_error_no_unlock;
+ }
+
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* someone closed the link, report error */
+ pr_debug("CAIF: %s(): remote end shutdown!\n",
+ __func__);
+ ret = -EPIPE;
+ goto write_error;
+ }
+
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ pr_debug("CAIF: %s(): "
+ "received remote_shutdown indication\n",
+ __func__);
+ ret = -ESHUTDOWN;
+ goto write_error;
+ }
+ }
+
+ pkt = cfpkt_create(payload_size);
+ skb = (struct sk_buff *)pkt;
+ skb->destructor = skb_destructor;
+ skb->sk = sk;
+ dbfs_atomic_inc(&cnt.skb_alloc);
+ dbfs_atomic_inc(&cnt.skb_in_use);
+ if (cfpkt_raw_append(pkt, (void **) &txbuf, payload_size) < 0) {
+ pr_debug("CAIF: %s(): cfpkt_raw_append failed\n", __func__);
+ cfpkt_destroy(pkt);
+ ret = -EINVAL;
+ goto write_error;
+ }
+
+ /* Copy data into buffer. */
+ if (copy_from_user(txbuf, payload, payload_size)) {
+ pr_debug("CAIF: %s(): copy_from_user returned non zero.\n",
+ __func__);
+ cfpkt_destroy(pkt);
+ ret = -EINVAL;
+ goto write_error;
+ }
+ memset(&info, 0, sizeof(info));
+
+ /* Send the packet down the stack. */
+ caif_assert(cf_sk->layer.dn);
+ caif_assert(cf_sk->layer.dn->transmit);
+
+ do {
+ ret = cf_sk->layer.dn->transmit(cf_sk->layer.dn, pkt);
+
+ if (likely((ret >= 0) || (ret != -EAGAIN)))
+ break;
+
+ /* EAGAIN - retry */
+ if (msg->msg_flags & MSG_DONTWAIT) {
+ pr_debug("CAIF: %s(): NONBLOCK and transmit failed,"
+ " error = %d\n", __func__, ret);
+ ret = -EAGAIN;
+ goto write_error;
+ }
+
+ /* Let readers in */
+ release_sock(&cf_sk->sk);
+
+ /* Wait until flow is on or socket is closed */
+ if (wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ TX_FLOW_IS_ON(cf_sk)
+ || !STATE_IS_OPEN(cf_sk)
+ || STATE_IS_REMOTE_SHUTDOWN(cf_sk)
+ ) == -ERESTARTSYS) {
+ pr_debug("CAIF: %s(): wait_event_interruptible"
+ " woken by a signal", __func__);
+ ret = -ERESTARTSYS;
+ goto write_error_no_unlock;
+ }
+
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ } while (ret == -EAGAIN);
+
+ if (ret < 0) {
+ cfpkt_destroy(pkt);
+ pr_debug("CAIF: %s(): transmit failed, error = %d\n",
+ __func__, ret);
+
+ goto write_error;
+ }
+
+ release_sock(&cf_sk->sk);
+ return payload_size;
+
+write_error:
+ release_sock(&cf_sk->sk);
+write_error_no_unlock:
+ return ret;
+}
+
+static unsigned int caif_poll(struct file *file, struct socket *sock,
+ poll_table *wait)
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ u32 mask = 0;
+
+ poll_wait(file, sk->sk_sleep, wait);
+ lock_sock(&(cf_sk->sk));
+ if (cfpkt_qpeek(cf_sk->pktq) != NULL)
+ mask |= (POLLIN | POLLRDNORM);
+ if (!STATE_IS_OPEN(cf_sk))
+ mask |= POLLHUP;
+ else if (TX_FLOW_IS_ON(cf_sk))
+ mask |= (POLLOUT | POLLWRNORM);
+ release_sock(&cf_sk->sk);
+ trace_printk("CAIF: %s(): poll mask=0x%04x...\n",
+ __func__, mask);
+ return mask;
+}
+
+static void drain_queue(struct caifsock *cf_sk)
+{
+ struct cfpkt *pkt = NULL;
+
+ /* Empty the queue */
+ do {
+ /* The queue has its own lock */
+ pkt = cfpkt_dequeue(cf_sk->pktq);
+ if (!pkt)
+ break;
+ pr_debug("CAIF: %s(): freeing packet from read queue\n",
+ __func__);
+ cfpkt_destroy(pkt);
+
+ } while (1);
+
+ spin_lock(&cf_sk->read_queue_len_lock);
+ cf_sk->read_queue_len = 0;
+ spin_unlock(&cf_sk->read_queue_len_lock);
+}
+
+
+static int setsockopt(struct socket *sock,
+ int lvl, int opt, char __user *ov, unsigned int ol)
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ int prio, linksel;
+ struct ifreq ifreq;
+
+ if (STATE_IS_OPEN(cf_sk)) {
+ pr_debug("CAIF: %s(): setsockopt "
+ "cannot be done on a connected socket\n",
+ __func__);
+ return -ENOPROTOOPT;
+ }
+ switch (opt) {
+ case CAIFSO_LINK_SELECT:
+ if (ol < sizeof(int)) {
+ pr_debug("CAIF: %s(): setsockopt"
+ " CAIFSO_CHANNEL_CONFIG bad size\n", __func__);
+ return -EINVAL;
+ }
+ if (lvl != SOL_CAIF)
+ goto bad_sol;
+ if (copy_from_user(&linksel, ov, sizeof(int)))
+ return -EINVAL;
+ lock_sock(&(cf_sk->sk));
+ cf_sk->conn_req.link_selector = linksel;
+ release_sock(&cf_sk->sk);
+ return 0;
+
+ case SO_PRIORITY:
+ if (lvl != SOL_SOCKET)
+ goto bad_sol;
+ if (ol < sizeof(int)) {
+ pr_debug("CAIF: %s(): setsockopt"
+ " SO_PRIORITY bad size\n", __func__);
+ return -EINVAL;
+ }
+ if (copy_from_user(&prio, ov, sizeof(int)))
+ return -EINVAL;
+ lock_sock(&(cf_sk->sk));
+ cf_sk->conn_req.priority = prio;
+ pr_debug("CAIF: %s(): Setting sockopt priority=%d\n", __func__,
+ cf_sk->conn_req.priority);
+ release_sock(&cf_sk->sk);
+ return 0;
+
+ case SO_BINDTODEVICE:
+ if (lvl != SOL_SOCKET)
+ goto bad_sol;
+ if (ol < sizeof(struct ifreq)) {
+ pr_debug("CAIF: %s(): setsockopt"
+ " SO_PRIORITY bad size\n", __func__);
+ return -EINVAL;
+ }
+ if (copy_from_user(&ifreq, ov, sizeof(ifreq)))
+ return -EFAULT;
+ lock_sock(&(cf_sk->sk));
+ strncpy(cf_sk->conn_req.link_name, ifreq.ifr_name,
+ sizeof(cf_sk->conn_req.link_name));
+ cf_sk->conn_req.link_name
+ [sizeof(cf_sk->conn_req.link_name)-1] = 0;
+ release_sock(&cf_sk->sk);
+ return 0;
+
+ case CAIFSO_REQ_PARAM:
+ if (lvl != SOL_CAIF)
+ goto bad_sol;
+ if (cf_sk->sk.sk_protocol != CAIFPROTO_UTIL)
+ return -ENOPROTOOPT;
+ if (ol > sizeof(cf_sk->conn_req.param.data))
+ goto req_param_bad_size;
+
+ lock_sock(&(cf_sk->sk));
+ cf_sk->conn_req.param.size = ol;
+ if (copy_from_user(&cf_sk->conn_req.param.data, ov, ol)) {
+ release_sock(&cf_sk->sk);
+req_param_bad_size:
+ pr_debug("CAIF: %s(): setsockopt"
+ " CAIFSO_CHANNEL_CONFIG bad size\n", __func__);
+ return -EINVAL;
+ }
+
+ pr_debug("CAIF: %s(): Setting reqparam len=%d "
+ "data=0x%02x%02x%02x%02x\n",
+ __func__,
+ cf_sk->conn_req.param.size,
+ cf_sk->conn_req.param.data[0],
+ cf_sk->conn_req.param.data[1],
+ cf_sk->conn_req.param.data[2],
+ cf_sk->conn_req.param.data[3]);
+ release_sock(&cf_sk->sk);
+ return 0;
+
+ default:
+ pr_debug("CAIF: %s(): unhandled option %d\n", __func__, opt);
+ return -EINVAL;
+ }
+
+ return 0;
+bad_sol:
+ pr_debug("CAIF: %s(): setsockopt bad level\n", __func__);
+ return -ENOPROTOOPT;
+
+}
+
+static int getsockopt(struct socket *sock,
+ int lvl, int opt, char __user *ov, int __user *ol)
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
+ int len;
+ u32 val;
+ if (lvl != SOL_CAIF)
+ return -ENOPROTOOPT;
+ if (get_user(len, ol))
+ return -EFAULT;
+ if (len < 0)
+ return -EINVAL;
+ if (!STATE_IS_OPEN(cf_sk) && !STATE_IS_PENDING(cf_sk)) {
+ pr_debug("CAIF: %s():"
+ "can only be done on a sconnected socket\n",
+ __func__);
+ return -ENOPROTOOPT;
+ }
+
+ if (ov == NULL || len < sizeof(int))
+ return -EINVAL;
+ switch (opt) {
+ default:
+ pr_debug("CAIF: %s(): unhandled option %d\n", __func__, opt);
+ return -ENOPROTOOPT;
+ }
+ if (copy_to_user(ov, &val, sizeof(val)))
+ return -EINVAL;
+
+ if (put_user(len, ol))
+ return -EFAULT;
+
+ return 0;
+}
+
+
+int caif_connect(struct socket *sock, struct sockaddr *uservaddr,
+ int sockaddr_len, int flags)
+{
+ struct caifsock *cf_sk = NULL;
+ int result = -1;
+ int mode = 0;
+ int ret = -EIO;
+ struct sock *sk = sock->sk;
+ BUG_ON(sk == NULL);
+
+ cf_sk = container_of(sk, struct caifsock, sk);
+
+ trace_printk("CAIF: %s(): cf_sk=%p OPEN=%d, TX_FLOW=%d, RX_FLOW=%d\n",
+ __func__, cf_sk,
+ STATE_IS_OPEN(cf_sk),
+ TX_FLOW_IS_ON(cf_sk), RX_FLOW_IS_ON(cf_sk));
+
+ sk->sk_state = TCP_CLOSE;
+ sock->state = SS_UNCONNECTED;
+
+ if (sock->type == SOCK_SEQPACKET) {
+ sock->state = SS_CONNECTED;
+ sk->sk_state = TCP_ESTABLISHED;
+ } else
+ goto out;
+
+ /* I want to be alone on cf_sk (except status and queue) */
+ lock_sock(&(cf_sk->sk));
+
+ if (sockaddr_len != sizeof(struct sockaddr_caif)) {
+ pr_debug("CAIF: %s(): Bad address len (%d,%d)\n",
+ __func__, sockaddr_len, sizeof(struct sockaddr_caif));
+ ret = -EINVAL;
+ goto open_error;
+ }
+
+ if (uservaddr->sa_family != AF_CAIF) {
+ pr_debug("CAIF: %s(): Bad address family (%d)\n",
+ __func__, uservaddr->sa_family);
+ ret = -EAFNOSUPPORT;
+ goto open_error;
+ }
+
+ memcpy(&cf_sk->conn_req.sockaddr, uservaddr,
+ sizeof(struct sockaddr_caif));
+
+ dbfs_atomic_inc(&cnt.num_open);
+ mode = SKT_READ_FLAG | SKT_WRITE_FLAG;
+
+ /* If socket is not open, make sure socket is in fully closed state */
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Has link close response been received (if we ever sent it)?*/
+ if (STATE_IS_PENDING(cf_sk)) {
+ /*
+ * Still waiting for close response from remote.
+ * If opened non-blocking, report "would block"
+ */
+ if (flags & MSG_DONTWAIT) {
+ pr_debug("CAIF: %s(): MSG_DONTWAIT"
+ " && close pending\n", __func__);
+ ret = -EAGAIN;
+ goto open_error;
+ }
+
+ pr_debug("CAIF: %s(): Wait for close response"
+ " from remote...\n", __func__);
+
+ release_sock(&cf_sk->sk);
+
+ /*
+ * Blocking mode; close is pending and we need to wait
+ * for its conclusion.
+ */
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ lock_sock(&(cf_sk->sk));
+ if (result == -ERESTARTSYS) {
+ pr_debug("CAIF: %s(): wait_event_interruptible"
+ "woken by a signal (1)", __func__);
+ ret = -ERESTARTSYS;
+ goto open_error;
+ }
+ }
+ }
+
+ /* socket is now either closed, pending open or open */
+ if (STATE_IS_OPEN(cf_sk) && !STATE_IS_PENDING(cf_sk)) {
+ /* Open */
+ pr_debug("CAIF: %s(): Socket is already opened (cf_sk=%p)"
+ " check access f_flags = 0x%x file_mode = 0x%x\n",
+ __func__, cf_sk, mode, cf_sk->file_mode);
+
+ if (mode & cf_sk->file_mode) {
+ pr_debug("CAIF: %s(): Access mode already in use"
+ "0x%x\n",
+ __func__, mode);
+ ret = -EBUSY;
+ goto open_error;
+ }
+ } else {
+ /* We are closed or pending open.
+ * If closed: send link setup
+ * If pending open: link setup already sent (we could have been
+ * interrupted by a signal last time)
+ */
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* First opening of file; connect lower layers: */
+ /* Drain queue (very unlikely) */
+ drain_queue(cf_sk);
+
+ cf_sk->layer.receive = caif_sktrecv_cb;
+
+ SET_STATE_OPEN(cf_sk);
+ SET_PENDING_ON(cf_sk);
+
+ /* Register this channel. */
+ result =
+ caif_connect_client(&cf_sk->conn_req,
+ &cf_sk->layer);
+ if (result < 0) {
+ pr_debug("CAIF: %s(): can't register channel\n",
+ __func__);
+ ret = -EIO;
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_OFF(cf_sk);
+ goto open_error;
+ }
+ dbfs_atomic_inc(&cnt.num_init);
+ }
+
+ /* If opened non-blocking, report "success".
+ */
+ if (flags & MSG_DONTWAIT) {
+ pr_debug("CAIF: %s(): MSG_DONTWAIT success\n",
+ __func__);
+ ret = 0;
+ goto open_success;
+ }
+
+ trace_printk("CAIF: %s(): Wait for connect response\n",
+ __func__);
+
+ /* release lock before waiting */
+ release_sock(&cf_sk->sk);
+
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ lock_sock(&(cf_sk->sk));
+
+ if (result == -ERESTARTSYS) {
+ pr_debug("CAIF: %s(): wait_event_interruptible"
+ "woken by a signal (2)", __func__);
+ ret = -ERESTARTSYS;
+ goto open_error;
+ }
+
+ if (!STATE_IS_OPEN(cf_sk)) {
+ /* Lower layers said "no" */
+ pr_debug("CAIF: %s(): Closed received\n", __func__);
+ ret = -EPIPE;
+ goto open_error;
+ }
+
+ trace_printk("CAIF: %s(): Connect received\n", __func__);
+ }
+open_success:
+ /* Open is ok */
+ cf_sk->file_mode |= mode;
+
+ trace_printk("CAIF: %s(): Connected - file mode = %x\n",
+ __func__, cf_sk->file_mode);
+
+ release_sock(&cf_sk->sk);
+ return 0;
+open_error:
+ release_sock(&cf_sk->sk);
+out:
+ return ret;
+}
+
+
+static int caif_shutdown(struct socket *sock, int how)
+{
+ struct caifsock *cf_sk = NULL;
+ int result;
+ int tx_flow_state_was_on;
+ struct sock *sk = sock->sk;
+ if (how != SHUT_RDWR)
+ return -EOPNOTSUPP; /* FIXME: ENOTSUP in userland for POSIX */
+ cf_sk = container_of(sk, struct caifsock, sk);
+ if (cf_sk == NULL) {
+ pr_debug("CAIF: %s(): COULD NOT FIND SOCKET\n", __func__);
+ return -EBADF;
+ }
+ /* I want to be alone on cf_sk (except status queue) */
+ lock_sock(&(cf_sk->sk));
+ sock_hold(&cf_sk->sk);
+
+ /* IS_CLOSED have double meaning:
+ * 1) Spontanous Remote Shutdown Request.
+ * 2) Ack on a channel teardown(disconnect)
+ * Must clear bit in case we previously received
+ * remote shudown request.
+ */
+ if (STATE_IS_OPEN(cf_sk) && !STATE_IS_PENDING(cf_sk)) {
+
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_ON(cf_sk);
+ sock->state = SS_DISCONNECTING;
+ tx_flow_state_was_on = TX_FLOW_IS_ON(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+
+ /* Hold the socket until DEINIT_RSP is received */
+ sock_hold(&cf_sk->sk);
+ result = caif_disconnect_client(&cf_sk->layer);
+
+ if (result < 0) {
+ pr_debug("CAIF: %s(): "
+ "caif_disconnect_client() failed\n",
+ __func__);
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_OFF(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+ release_sock(&cf_sk->sk);
+ sock_put(&cf_sk->sk);
+ return -EIO;
+ }
+
+ }
+ if (STATE_IS_REMOTE_SHUTDOWN(cf_sk)) {
+ SET_PENDING_OFF(cf_sk);
+ SET_REMOTE_SHUTDOWN_OFF(cf_sk);
+ }
+ result =
+ wait_event_interruptible(*cf_sk->sk.sk_sleep,
+ !STATE_IS_PENDING(cf_sk));
+
+ if (result == -ERESTARTSYS) {
+ pr_debug("CAIF: %s(): wait_event_interruptible"
+ "woken by a signal (1)", __func__);
+ }
+
+ /*
+ * Socket is no longer in state pending close,
+ * and we can release the reference.
+ */
+
+ dbfs_atomic_inc(&cnt.num_close);
+ drain_queue(cf_sk);
+ SET_RX_FLOW_ON(cf_sk);
+ cf_sk->file_mode = 0;
+ sock_put(&cf_sk->sk);
+ release_sock(&cf_sk->sk);
+ return result;
+}
+
+static ssize_t caif_sock_no_sendpage(struct socket *sock,
+ struct page *page,
+ int offset, size_t size, int flags)
+{
+ return -EOPNOTSUPP;
+}
+
+/* This function is called as part of close. */
+static int caif_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct caifsock *cf_sk = NULL;
+ int res;
+
+ caif_assert(sk != NULL);
+ cf_sk = container_of(sk, struct caifsock, sk);
+
+ res = caif_shutdown(sock, SHUT_RDWR);
+ if (res)
+ return res;
+ lock_sock(&(cf_sk->sk));
+
+ sock->sk = NULL;
+
+ /* Detach the socket from its process context by making it orphan. */
+ sock_orphan(sk);
+
+ /*
+ * Setting SHUTDOWN_MASK means that both send and receive are shutdown
+ * for the socket.
+ */
+ sk->sk_shutdown = SHUTDOWN_MASK;
+
+ /*
+ * Set the socket state to closed, the TCP_CLOSE macro is used when
+ * closing any socket.
+ */
+ sk->sk_state = TCP_CLOSE;
+
+ /* Flush out this sockets receive queue. */
+ drain_queue(cf_sk);
+
+ /* Finally release the socket. */
+ STATE_IS_PENDING_DESTROY(cf_sk);
+ release_sock(&cf_sk->sk);
+
+ sock_put(sk);
+
+ /*
+ * The rest of the cleanup will be handled from the
+ * caif_sock_destructor
+ */
+ return 0;
+}
+
+static struct proto_ops caif_ops = {
+ .family = PF_CAIF,
+ .owner = THIS_MODULE,
+ .release = caif_release,
+ .bind = sock_no_bind,
+ .connect = caif_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = sock_no_accept,
+ .getname = sock_no_getname,
+ .poll = caif_poll,
+ .ioctl = sock_no_ioctl,
+ .listen = sock_no_listen,
+ .shutdown = caif_shutdown,
+ .setsockopt = setsockopt,
+ .getsockopt = getsockopt,
+ .sendmsg = caif_sendmsg,
+ .recvmsg = caif_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = caif_sock_no_sendpage,
+};
+
+/* This function is called when a socket is finally destroyed. */
+static void caif_sock_destructor(struct sock *sk)
+{
+ struct caifsock *cf_sk = NULL;
+ cf_sk = container_of(sk, struct caifsock, sk);
+
+ /* Error checks. */
+ caif_assert(!atomic_read(&sk->sk_wmem_alloc));
+ caif_assert(sk_unhashed(sk));
+ caif_assert(!sk->sk_socket);
+
+ if (!sock_flag(sk, SOCK_DEAD)) {
+ pr_debug("CAIF: %s(): 0x%p", __func__, sk);
+ return;
+ }
+
+ lock_sock(&(cf_sk->sk));
+
+ if (STATE_IS_OPEN(cf_sk)) {
+ pr_debug("CAIF: %s(): socket is opened (cf_sk=%p)"
+ " file_mode = 0x%x\n", __func__,
+ cf_sk, cf_sk->file_mode);
+ release_sock(&cf_sk->sk);
+ return;
+ }
+ drain_queue(cf_sk);
+ kfree(cf_sk->pktq);
+
+ if (cf_sk->debugfs_socket_dir != NULL)
+ debugfs_remove_recursive(cf_sk->debugfs_socket_dir);
+
+ release_sock(&cf_sk->sk);
+ trace_printk("CAIF: %s(): caif_sock_destructor: Removing socket %s\n",
+ __func__, cf_sk->name);
+ atomic_dec(&caif_nr_socks);
+}
+
+static int caif_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
+{
+ struct sock *sk = NULL;
+ struct caifsock *cf_sk = NULL;
+ int result = 0;
+ static struct proto prot = {.name = "PF_CAIF",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct caifsock),
+ };
+
+ /*
+ * The sock->type specifies the socket type to use. The CAIF socket is
+ * a packet stream in the sence that it is packet based.
+ * CAIF trusts the reliability of the link, no resending is implemented.
+ */
+ if (sock->type != SOCK_SEQPACKET)
+ return -ESOCKTNOSUPPORT;
+ prot.slab = caif_sk_cachep;
+
+ if (net != &init_net)
+ return -EAFNOSUPPORT;
+
+ if (protocol < 0 || protocol >= CAIFPROTO_MAX)
+ return -EPROTONOSUPPORT;
+ /*
+ * Set the socket state to unconnected. The socket state is really
+ * not used at all in the net/core or socket.c but the
+ * initialization makes sure that sock->state is not uninitialized.
+ */
+ sock->state = SS_UNCONNECTED;
+
+ sk = sk_alloc(net, PF_CAIF, GFP_KERNEL, &prot);
+ if (!sk)
+ return -ENOMEM;
+
+ cf_sk = container_of(sk, struct caifsock, sk);
+
+ /* Store the protocol */
+ sk->sk_protocol = (unsigned char) protocol;
+
+ spin_lock_init(&cf_sk->read_queue_len_lock);
+
+ /* Fill in some information concerning the misc socket. */
+ snprintf(cf_sk->name, sizeof(cf_sk->name), "cf_sk%d",
+ atomic_read(&caif_nr_socks));
+
+ /*
+ * Lock in order to try to stop someone from opening the socket
+ * too early.
+ */
+ lock_sock(&(cf_sk->sk));
+
+ /* Initialize the nozero default sock structure data. */
+ sock_init_data(sock, sk);
+ sock->ops = &caif_ops;
+ sk->sk_destruct = caif_sock_destructor;
+ sk->sk_sndbuf = caif_sockbuf_size;
+ sk->sk_rcvbuf = caif_sockbuf_size;
+
+ cf_sk->pktq = cfpktq_create();
+
+ if (!cf_sk->pktq) {
+ pr_err("CAIF: %s(): queue create failed.\n", __func__);
+ result = -ENOMEM;
+ release_sock(&cf_sk->sk);
+ goto err_failed;
+ }
+ cf_sk->layer.ctrlcmd = caif_sktflowctrl_cb;
+ SET_STATE_CLOSED(cf_sk);
+ SET_PENDING_OFF(cf_sk);
+ SET_TX_FLOW_OFF(cf_sk);
+ SET_RX_FLOW_ON(cf_sk);
+
+ /* Set default options on configuration */
+ cf_sk->conn_req.priority = CAIF_PRIO_NORMAL;
+ cf_sk->conn_req.link_selector = CAIF_LINK_HIGH_BANDW;
+ cf_sk->conn_req.protocol = protocol;
+ /* Increase the number of sockets created. */
+ atomic_inc(&caif_nr_socks);
+ if (!IS_ERR(debugfsdir)) {
+ cf_sk->debugfs_socket_dir =
+ debugfs_create_dir(cf_sk->name, debugfsdir);
+ debugfs_create_u32("conn_state", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_socket_dir, &cf_sk->conn_state);
+ debugfs_create_u32("flow_state", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_socket_dir, &cf_sk->flow_state);
+ debugfs_create_u32("read_queue_len", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_socket_dir,
+ (u32 *) &cf_sk->read_queue_len);
+ debugfs_create_u32("identity", S_IRUSR | S_IWUSR,
+ cf_sk->debugfs_socket_dir,
+ (u32 *) &cf_sk->layer.id);
+ }
+ release_sock(&cf_sk->sk);
+ return 0;
+err_failed:
+ sk_free(sk);
+ return result;
+}
+
+
+static struct net_proto_family caif_family_ops = {
+ .family = PF_CAIF,
+ .create = caif_create,
+ .owner = THIS_MODULE,
+};
+
+int af_caif_init(void)
+{
+ int err;
+ err = sock_register(&caif_family_ops);
+
+ if (!err)
+ return err;
+
+ return 0;
+}
+
+static int __init caif_sktinit_module(void)
+{
+ int stat;
+#ifdef CONFIG_DEBUG_FS
+ debugfsdir = debugfs_create_dir("chnl_skt", NULL);
+ if (!IS_ERR(debugfsdir)) {
+ debugfs_create_u32("skb_inuse", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.skb_in_use);
+ debugfs_create_u32("skb_alloc", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.skb_alloc);
+ debugfs_create_u32("skb_free", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.skb_free);
+ debugfs_create_u32("num_sockets", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &caif_nr_socks);
+ debugfs_create_u32("num_open", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_open);
+ debugfs_create_u32("num_close", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_close);
+ debugfs_create_u32("num_init", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_init);
+ debugfs_create_u32("num_init_resp", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_init_resp);
+ debugfs_create_u32("num_init_fail_resp", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_init_fail_resp);
+ debugfs_create_u32("num_deinit", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_deinit);
+ debugfs_create_u32("num_deinit_resp", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_deinit_resp);
+ debugfs_create_u32("num_remote_shutdown_ind",
+ S_IRUSR | S_IWUSR, debugfsdir,
+ (u32 *) &cnt.num_remote_shutdown_ind);
+ debugfs_create_u32("num_tx_flow_off_ind", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_tx_flow_off_ind);
+ debugfs_create_u32("num_tx_flow_on_ind", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_tx_flow_on_ind);
+ debugfs_create_u32("num_rx_flow_off", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_rx_flow_off);
+ debugfs_create_u32("num_rx_flow_on", S_IRUSR | S_IWUSR,
+ debugfsdir,
+ (u32 *) &cnt.num_rx_flow_on);
+ }
+#endif
+ stat = af_caif_init();
+ if (stat) {
+ pr_err("CAIF: %s(): Failed to initialize CAIF socket layer.",
+ __func__);
+ return stat;
+ }
+ return 0;
+}
+
+static void __exit caif_sktexit_module(void)
+{
+ sock_unregister(PF_CAIF);
+ if (debugfsdir != NULL)
+ debugfs_remove_recursive(debugfsdir);
+}
+
+module_init(caif_sktinit_module);
+module_exit(caif_sktexit_module);
+
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 10/12] net-caif: add CAIF Kconfig and Makefiles
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-10-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Kconfig and Makefiles with options for:
CAIF: Including caif
CAIF_DEBUG: CAIF Debug
CAIF_NETDEV: CAIF Network Device for GPRS Contexts
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
net/Kconfig | 2 ++
net/Makefile | 1 +
net/caif/Kconfig | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
net/caif/Makefile | 27 +++++++++++++++++++++++++++
4 files changed, 78 insertions(+), 0 deletions(-)
diff --git a/net/Kconfig b/net/Kconfig
index 041c35e..9342f7b 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -275,5 +275,7 @@ source "net/wimax/Kconfig"
source "net/rfkill/Kconfig"
source "net/9p/Kconfig"
+source "net/caif/Kconfig"
+
endif # if NET
diff --git a/net/Makefile b/net/Makefile
index 1542e72..a5eae27 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -56,6 +56,7 @@ obj-$(CONFIG_NETLABEL) += netlabel/
obj-$(CONFIG_IUCV) += iucv/
obj-$(CONFIG_RFKILL) += rfkill/
obj-$(CONFIG_NET_9P) += 9p/
+obj-$(CONFIG_CAIF) += caif/
ifneq ($(CONFIG_DCB),)
obj-y += dcb/
endif
diff --git a/net/caif/Kconfig b/net/caif/Kconfig
new file mode 100644
index 0000000..65a926d
--- /dev/null
+++ b/net/caif/Kconfig
@@ -0,0 +1,48 @@
+#
+# CAIF net configurations
+#
+
+#menu "CAIF Support"
+comment "CAIF Support"
+menuconfig CAIF
+ tristate "Enable CAIF support"
+ select CRC_CCITT
+ default n
+ ---help---
+ The "Communication CPU to Application CPU Interface" (CAIF) is a packet
+ based connection-oriented MUX protocol developed by ST-Ericsson for use
+ with its modems. It is accessed from user space as sockets (PF_CAIF).
+
+ Say Y (or M) here if you build for a phone product (e.g. Android) that
+ uses CAIF as transport, if unsure say N.
+
+ If you select to build it as module then CAIF_SOCK and CAIF_NETDEV also
+ needs to be built as modules. You will also need to say yes to any CAIF
+ physical devices that your platform requires.
+
+ See Documentation/networking/caif for a further explanation on how to
+ use and configure CAIF.
+
+if CAIF
+
+config CAIF_DEBUG
+ bool "Enable Debug"
+ default n
+ --- help ---
+ Enable the inclusion of debug code in the CAIF stack.
+ Be aware that doing this will impact performance.
+ If unsure say N.
+
+
+config CAIF_NETDEV
+ tristate "CAIF GPRS Network device"
+ default CAIF
+ ---help---
+ Say Y if you will be using a CAIF based GPRS network device.
+ This can be either built-in or a loadable module,
+ If you select to build it as a built-in then the main CAIF device must
+ also be a built-in.
+ If unsure say Y.
+
+endif
+#endmenu
diff --git a/net/caif/Makefile b/net/caif/Makefile
new file mode 100644
index 0000000..031a4e0
--- /dev/null
+++ b/net/caif/Makefile
@@ -0,0 +1,27 @@
+ifeq ($(CONFIG_CAIF_DEBUG),1)
+CAIF_DBG_FLAGS := -DDEBUG
+endif
+
+ccflags-y := $(CAIF_FLAGS) $(CAIF_DBG_FLAGS)
+
+caif-objs := caif_dev.o \
+ cfcnfg.o cfmuxl.o cfctrl.o \
+ cffrml.o cfveil.o cfdbgl.o\
+ cfserl.o cfdgml.o \
+ cfrfml.o cfvidl.o cfutill.o \
+ cfsrvl.o cfpkt_skbuff.o caif_config_util.o
+clean-dirs:= .tmp_versions
+
+clean-files:= \
+ Module.symvers \
+ modules.order \
+ *.cmd \
+ *.o \
+ *~
+
+obj-$(CONFIG_CAIF) += caif.o
+obj-$(CONFIG_CAIF_NETDEV) += chnl_net.o
+obj-$(CONFIG_CAIF) += caif_socket.o
+
+export-objs := caif.o
+
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 07/12] net-caif: add CAIF device registration functionality
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-7-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Registration and deregistration of CAIF Link Layer.
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
net/caif/caif_config_util.c | 88 ++++++++++
net/caif/caif_dev.c | 394 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 482 insertions(+), 0 deletions(-)
diff --git a/net/caif/caif_config_util.c b/net/caif/caif_config_util.c
new file mode 100644
index 0000000..af7daf8
--- /dev/null
+++ b/net/caif/caif_config_util.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <net/caif/cfctrl.h>
+#include <net/caif/cfcnfg.h>
+#include <net/caif/caif_dev.h>
+int connect_req_to_link_param(struct cfcnfg *cnfg,
+ struct caif_connect_request *s,
+ struct cfctrl_link_param *l)
+{
+ struct dev_info *dev_info;
+ enum cfcnfg_phy_preference pref;
+ memset(l, 0, sizeof(*l));
+ l->priority = s->priority;
+
+ if (s->link_name[0] != '\0')
+ l->phyid = cfcnfg_get_named(cnfg, s->link_name);
+ else {
+ switch (s->link_selector) {
+ case CAIF_LINK_HIGH_BANDW:
+ pref = CFPHYPREF_HIGH_BW;
+ break;
+ case CAIF_LINK_LOW_LATENCY:
+ pref = CFPHYPREF_LOW_LAT;
+ break;
+ default:
+ return -EINVAL;
+ }
+ dev_info = cfcnfg_get_phyid(cnfg, pref);
+ if (dev_info == NULL)
+ return -ENODEV;
+ l->phyid = dev_info->id;
+ }
+ switch (s->protocol) {
+ case CAIFPROTO_AT:
+ l->linktype = CFCTRL_SRV_VEI;
+ if (s->sockaddr.u.at.type == CAIF_ATTYPE_PLAIN)
+ l->chtype = 0x02;
+ else
+ l->chtype = s->sockaddr.u.at.type;
+ l->endpoint = 0x00;
+ break;
+ case CAIFPROTO_DATAGRAM:
+ l->linktype = CFCTRL_SRV_DATAGRAM;
+ l->chtype = 0x00;
+ l->u.datagram.connid = s->sockaddr.u.dgm.connection_id;
+ break;
+ case CAIFPROTO_DATAGRAM_LOOP:
+ l->linktype = CFCTRL_SRV_DATAGRAM;
+ l->chtype = 0x03;
+ l->endpoint = 0x00;
+ l->u.datagram.connid = s->sockaddr.u.dgm.connection_id;
+ break;
+ case CAIFPROTO_RFM:
+ l->linktype = CFCTRL_SRV_RFM;
+ l->u.datagram.connid = s->sockaddr.u.rfm.connection_id;
+ strncpy(l->u.rfm.volume, s->sockaddr.u.rfm.volume,
+ sizeof(l->u.rfm.volume)-1);
+ l->u.rfm.volume[sizeof(l->u.rfm.volume)-1] = 0;
+ break;
+ case CAIFPROTO_UTIL:
+ l->linktype = CFCTRL_SRV_UTIL;
+ l->endpoint = 0x00;
+ l->chtype = 0x00;
+ strncpy(l->u.utility.name, s->sockaddr.u.util.service,
+ sizeof(l->u.utility.name)-1);
+ l->u.utility.name[sizeof(l->u.utility.name)-1] = 0;
+ caif_assert(sizeof(l->u.utility.name) > 10);
+ l->u.utility.paramlen = s->param.size;
+ if (l->u.utility.paramlen > sizeof(l->u.utility.params))
+ l->u.utility.paramlen = sizeof(l->u.utility.params);
+
+ memcpy(l->u.utility.params, s->param.data,
+ l->u.utility.paramlen);
+
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+
diff --git a/net/caif/caif_dev.c b/net/caif/caif_dev.c
new file mode 100644
index 0000000..2dd0b96
--- /dev/null
+++ b/net/caif/caif_dev.c
@@ -0,0 +1,394 @@
+/*
+ * CAIF Interface registration.
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ * Borrowed heavily from file: pn_dev.c. Thanks to
+ * Remi Denis-Courmont <remi.denis-courmont@nokia.com>
+ * and Sakari Ailus <sakari.ailus@nokia.com>
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/if_arp.h>
+#include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <net/netns/generic.h>
+#include <net/net_namespace.h>
+#include <net/pkt_sched.h>
+#include <net/caif/caif_device.h>
+#include <net/caif/caif_dev.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfpkt.h>
+#include <net/caif/cfcnfg.h>
+
+MODULE_LICENSE("GPL");
+#define TIMEOUT (HZ*1000)
+
+/* Used for local tracking of the CAIF net devices */
+struct caif_device_entry {
+ struct cflayer layer;
+ struct list_head list;
+ atomic_t in_use;
+ atomic_t state;
+ u16 phyid;
+ struct net_device *netdev;
+ wait_queue_head_t event;
+};
+
+struct caif_device_entry_list {
+ struct list_head list;
+ spinlock_t lock;
+};
+
+struct caif_net {
+ struct caif_device_entry_list caifdevs;
+};
+
+int caif_net_id;
+struct cfcnfg *cfg;
+
+struct caif_device_entry_list *caif_device_list(struct net *net)
+{
+ struct caif_net *caifn;
+ BUG_ON(!net);
+ caifn = net_generic(net, caif_net_id);
+ BUG_ON(!caifn);
+ return &caifn->caifdevs;
+}
+
+/* Allocate new CAIF device. */
+static struct caif_device_entry *caif_device_alloc(struct net_device *dev)
+{
+ struct caif_device_entry_list *caifdevs;
+ struct caif_device_entry *caifd;
+ caifdevs = caif_device_list(dev_net(dev));
+ BUG_ON(!caifdevs);
+ caifd = kzalloc(sizeof(*caifd), GFP_ATOMIC);
+ if (!caifd)
+ return NULL;
+ caifd->netdev = dev;
+ list_add(&caifd->list, &caifdevs->list);
+ init_waitqueue_head(&caifd->event);
+ return caifd;
+}
+
+static struct caif_device_entry *caif_get(struct net_device *dev)
+{
+ struct caif_device_entry_list *caifdevs =
+ caif_device_list(dev_net(dev));
+ struct caif_device_entry *caifd;
+ BUG_ON(!caifdevs);
+ list_for_each_entry(caifd, &caifdevs->list, list) {
+ if (caifd->netdev == dev)
+ return caifd;
+ }
+ return NULL;
+}
+
+static void caif_device_destroy(struct net_device *dev)
+{
+ struct caif_device_entry_list *caifdevs =
+ caif_device_list(dev_net(dev));
+ struct caif_device_entry *caifd;
+ ASSERT_RTNL();
+ if (dev->type != ARPHRD_CAIF)
+ return;
+
+ spin_lock_bh(&caifdevs->lock);
+ caifd = caif_get(dev);
+ if (caifd == NULL) {
+ spin_unlock_bh(&caifdevs->lock);
+ return;
+ }
+
+ list_del(&caifd->list);
+ spin_unlock_bh(&caifdevs->lock);
+
+ kfree(caifd);
+ return;
+}
+
+static int transmit(struct cflayer *layer, struct cfpkt *pkt)
+{
+ struct caif_device_entry *caifd =
+ container_of(layer, struct caif_device_entry, layer);
+ struct sk_buff *skb, *skb2;
+ int ret = -EINVAL;
+ skb = cfpkt_tonative(pkt);
+ skb->dev = caifd->netdev;
+ /*
+ * Don't allow SKB to be destroyed upon error, but signal resend
+ * notification to clients. We can't rely on the return value as
+ * congestion (NET_XMIT_CN) sometimes drops the packet, sometimes don't.
+ */
+ if (netif_queue_stopped(caifd->netdev))
+ return -EAGAIN;
+ skb2 = skb_get(skb);
+
+ ret = dev_queue_xmit(skb2);
+
+ if (!ret)
+ kfree_skb(skb);
+ else
+ return -EAGAIN;
+
+ return 0;
+}
+
+static int modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl)
+{
+ struct caif_device_entry *caifd;
+ struct caif_dev_common *caifdev;
+ caifd = container_of(layr, struct caif_device_entry, layer);
+ caifdev = netdev_priv(caifd->netdev);
+ if (ctrl == _CAIF_MODEMCMD_PHYIF_USEFULL) {
+ atomic_set(&caifd->in_use, 1);
+ wake_up_interruptible(&caifd->event);
+
+ } else if (ctrl == _CAIF_MODEMCMD_PHYIF_USELESS) {
+ atomic_set(&caifd->in_use, 0);
+ wake_up_interruptible(&caifd->event);
+ }
+ return 0;
+}
+
+/*
+ * Stuff received packets to associated sockets.
+ * On error, returns non-zero and releases the skb.
+ */
+static int receive(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pkttype, struct net_device *orig_dev)
+{
+ struct net *net;
+ struct cfpkt *pkt;
+ struct caif_device_entry *caifd;
+ net = dev_net(dev);
+ pkt = cfpkt_fromnative(CAIF_DIR_IN, skb);
+ caifd = caif_get(dev);
+ if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd)
+ return NET_RX_DROP;
+
+ if (caifd->layer.up->receive(caifd->layer.up, pkt))
+ return NET_RX_DROP;
+
+ return 0;
+}
+
+static struct packet_type caif_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_CAIF),
+ .func = receive,
+};
+
+static void dev_flowctrl(struct net_device *dev, int on)
+{
+ struct caif_device_entry *caifd = caif_get(dev);
+ if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd)
+ return;
+
+ caifd->layer.up->ctrlcmd(caifd->layer.up,
+ on ?
+ _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND :
+ _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND,
+ caifd->layer.id);
+}
+
+/* notify Caif of device events */
+static int caif_device_notify(struct notifier_block *me, unsigned long what,
+ void *arg)
+{
+ struct net_device *dev = arg;
+ struct caif_device_entry *caifd = NULL;
+ struct caif_dev_common *caifdev;
+ int res = -EINVAL;
+ enum cfcnfg_phy_type phy_type;
+
+ if (dev->type != ARPHRD_CAIF)
+ return 0;
+
+ switch (what) {
+ case NETDEV_REGISTER:
+ pr_info("CAIF: %s():register %s\n", __func__, dev->name);
+ caifd = caif_device_alloc(dev);
+ if (caifd == NULL)
+ break;
+ caifdev = netdev_priv(dev);
+ caifdev->flowctrl = dev_flowctrl;
+ atomic_set(&caifd->state, what);
+ res = 0;
+ break;
+
+ case NETDEV_UP:
+ pr_info("CAIF: %s(): up %s\n", __func__, dev->name);
+ caifd = caif_get(dev);
+ if (caifd == NULL)
+ break;
+ caifdev = netdev_priv(dev);
+ if (atomic_read(&caifd->state) == NETDEV_UP) {
+ pr_info("CAIF: %s():%s already up\n",
+ __func__, dev->name);
+ break;
+ }
+ atomic_set(&caifd->state, what);
+ caifd->layer.transmit = transmit;
+ caifd->layer.modemcmd = modemcmd;
+
+ if (caifdev->use_frag)
+ phy_type = CFPHYTYPE_FRAG;
+ else
+ phy_type = CFPHYTYPE_CAIF;
+
+ cfcnfg_add_phy_layer(get_caif_conf(),
+ phy_type,
+ dev,
+ &caifd->layer,
+ &caifd->phyid,
+ caifdev->link_select,
+ caifdev->use_fcs,
+ caifdev->use_stx);
+ strncpy(caifd->layer.name, dev->name,
+ sizeof(caifd->layer.name) - 1);
+ caifd->layer.name[sizeof(caifd->layer.name) - 1] = 0;
+ break;
+
+ case NETDEV_GOING_DOWN:
+ caifd = caif_get(dev);
+ if (caifd == NULL)
+ break;
+ pr_info("CAIF: %s():going down %s\n", __func__, dev->name);
+ atomic_set(&caifd->state, what);
+ if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd)
+ return -EINVAL;
+ caifd->layer.up->ctrlcmd(caifd->layer.up,
+ _CAIF_CTRLCMD_PHYIF_DOWN_IND,
+ caifd->layer.id);
+ res = wait_event_interruptible_timeout(caifd->event,
+ atomic_read(&caifd->in_use) == 0,
+ TIMEOUT);
+ break;
+
+ case NETDEV_DOWN:
+ caifd = caif_get(dev);
+ if (caifd == NULL)
+ break;
+ pr_info("CAIF: %s(): down %s\n", __func__, dev->name);
+ if (atomic_read(&caifd->in_use))
+ pr_warning("CAIF: %s(): "
+ "Unregistering an active CAIF device: %s\n",
+ __func__, dev->name);
+ cfcnfg_del_phy_layer(get_caif_conf(), &caifd->layer);
+ atomic_set(&caifd->state, what);
+ break;
+
+ case NETDEV_UNREGISTER:
+ caifd = caif_get(dev);
+ pr_info("CAIF: %s(): unregister %s\n", __func__, dev->name);
+ atomic_set(&caifd->state, what);
+ caif_device_destroy(dev);
+ break;
+ }
+ return 0;
+}
+
+static struct notifier_block caif_device_notifier = {
+ .notifier_call = caif_device_notify,
+ .priority = 0,
+};
+
+
+struct cfcnfg *get_caif_conf(void)
+{
+ return cfg;
+}
+EXPORT_SYMBOL(get_caif_conf);
+
+int caif_connect_client(struct caif_connect_request *conn_req,
+ struct cflayer *client_layer)
+{
+ struct cfctrl_link_param param;
+ if (connect_req_to_link_param(get_caif_conf(), conn_req, ¶m) == 0)
+ /* Hook up the adaptation layer. */
+ return cfcnfg_add_adaptation_layer(get_caif_conf(),
+ ¶m, client_layer);
+
+ return -EINVAL;
+
+ caif_assert(0);
+}
+EXPORT_SYMBOL(caif_connect_client);
+
+int caif_disconnect_client(struct cflayer *adap_layer)
+{
+ return cfcnfg_del_adapt_layer(get_caif_conf(), adap_layer);
+}
+EXPORT_SYMBOL(caif_disconnect_client);
+
+/* Per-namespace Caif devices handling */
+static int caif_init_net(struct net *net)
+{
+ struct caif_net *caifn = net_generic(net, caif_net_id);
+ INIT_LIST_HEAD(&caifn->caifdevs.list);
+ spin_lock_init(&caifn->caifdevs.lock);
+ return 0;
+}
+
+static void caif_exit_net(struct net *net)
+{
+ struct net_device *dev;
+ int res;
+ rtnl_lock();
+ for_each_netdev(net, dev) {
+ if (dev->type != ARPHRD_CAIF)
+ continue;
+ res = dev_close(dev);
+ caif_device_destroy(dev);
+ }
+ rtnl_unlock();
+}
+
+static struct pernet_operations caif_net_ops = {
+ .init = caif_init_net,
+ .exit = caif_exit_net,
+ .id = &caif_net_id,
+ .size = sizeof(struct caif_net),
+};
+
+/* Initialize Caif devices list */
+int __init caif_device_init(void)
+{
+ int result;
+ cfg = cfcnfg_create();
+ if (!cfg) {
+ pr_warning("CAIF: %s(): can't create cfcnfg.\n", __func__);
+ goto err_cfcnfg_create_failed;
+ }
+ result = register_pernet_device(&caif_net_ops);
+
+ if (result) {
+ kfree(cfg);
+ cfg = NULL;
+ return result;
+ }
+ dev_add_pack(&caif_packet_type);
+ register_netdevice_notifier(&caif_device_notifier);
+
+ return result;
+err_cfcnfg_create_failed:
+ return -ENODEV;
+}
+
+void __exit caif_device_exit(void)
+{
+ dev_remove_pack(&caif_packet_type);
+ unregister_pernet_device(&caif_net_ops);
+ unregister_netdevice_notifier(&caif_device_notifier);
+ cfcnfg_remove(cfg);
+}
+
+module_init(caif_device_init);
+module_exit(caif_device_exit);
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 03/12] net-caif: add CAIF core protocol stack header files
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-3-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Add include files for the CAIF Core protocol stack.
caif_layer.h - Defines the structure of the CAIF protocol layers
cfcnfg.h - CAIF Configuration Module for services and link layers
cfctrl.h - CAIF Control Protocol Layer
cffrml.h - CAIF Framing Layer
cfmuxl.h - CAIF Muxing Layer
cfpkt.h - CAIF Packet layer (skb helper functions)
cfserl.h - CAIF Serial Layer
cfsrvl.h - CAIF Service Layer
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
include/net/caif/caif_layer.h | 283 +++++++++++++++++++++++++++++++++++++++++
include/net/caif/cfcnfg.h | 134 +++++++++++++++++++
include/net/caif/cfctrl.h | 136 ++++++++++++++++++++
include/net/caif/cffrml.h | 17 +++
include/net/caif/cfmuxl.h | 22 +++
include/net/caif/cfpkt.h | 274 +++++++++++++++++++++++++++++++++++++++
include/net/caif/cfserl.h | 13 ++
include/net/caif/cfsrvl.h | 34 +++++
8 files changed, 913 insertions(+), 0 deletions(-)
diff --git a/include/net/caif/caif_layer.h b/include/net/caif/caif_layer.h
new file mode 100644
index 0000000..2fc78d4
--- /dev/null
+++ b/include/net/caif/caif_layer.h
@@ -0,0 +1,283 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland / sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CAIF_LAYER_H_
+#define CAIF_LAYER_H_
+
+#include <linux/list.h>
+
+struct cflayer;
+struct cfpkt;
+struct cfpktq;
+struct caif_payload_info;
+struct caif_packet_funcs;
+
+#define CAIF_MAX_FRAMESIZE 4096
+#define CAIF_MAX_PAYLOAD_SIZE (4096 - 64)
+#define CAIF_NEEDED_HEADROOM (10)
+#define CAIF_NEEDED_TAILROOM (2)
+
+
+#define CAIF_LAYER_NAME_SZ 16
+#define CAIF_SUCCESS 1
+#define CAIF_FAILURE 0
+
+/**
+ * caif_assert() - Assert function for CAIF.
+ * @assert: expression to evaluate.
+ *
+ * This function will print a error message and a do WARN_ON if the
+ * assertion failes. Normally this will do a stack up at the current location.
+ */
+#define caif_assert(assert)\
+do if (!(assert)) { \
+ pr_err("caif:Assert detected:'%s'\n", #assert); \
+ WARN_ON(!(assert));\
+} while (0)
+
+/**
+ * enum caif_ctrlcmd - CAIF Stack Control Signaling sent in layer.ctrlcmd().
+ *
+ * @CAIF_CTRLCMD_FLOW_OFF_IND: Flow Control is OFF, transmit function
+ * should stop sending data
+ *
+ * @CAIF_CTRLCMD_FLOW_ON_IND: Flow Control is ON, transmit function
+ * can start sending data
+ *
+ * @CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND: Remote end modem has decided to close
+ * down channel
+ *
+ * @CAIF_CTRLCMD_INIT_RSP: Called initially when the layer below
+ * has finished initialization
+ *
+ * @CAIF_CTRLCMD_DEINIT_RSP: Called when de-initialization is
+ * complete
+ *
+ * @CAIF_CTRLCMD_INIT_FAIL_RSP: Called if initialization fails
+ *
+ * @_CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND: CAIF Link layer temporarily cannot
+ * send more packets.
+ * @_CAIF_CTRLCMD_PHYIF_FLOW_ON_IND: Called if CAIF Link layer is able
+ * to send packets again.
+ * @_CAIF_CTRLCMD_PHYIF_DOWN_IND: Called if CAIF Link layer is going
+ * down.
+ *
+ * These commands are sent upwards in the CAIF stack to the CAIF Client.
+ * They are used for signaling originating from the modem or CAIF Link Layer.
+ * These are either responses (*_RSP) or events (*_IND).
+ */
+enum caif_ctrlcmd {
+ CAIF_CTRLCMD_FLOW_OFF_IND,
+ CAIF_CTRLCMD_FLOW_ON_IND,
+ CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND,
+ CAIF_CTRLCMD_INIT_RSP,
+ CAIF_CTRLCMD_DEINIT_RSP,
+ CAIF_CTRLCMD_INIT_FAIL_RSP,
+ _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND,
+ _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND,
+ _CAIF_CTRLCMD_PHYIF_DOWN_IND,
+};
+
+/**
+ * enum caif_modemcmd - Modem Control Signaling, sent from CAIF Client
+ * to the CAIF Link Layer or modem.
+ *
+ * @CAIF_MODEMCMD_FLOW_ON_REQ: Flow Control is ON, transmit function
+ * can start sending data.
+ *
+ * @CAIF_MODEMCMD_FLOW_OFF_REQ: Flow Control is OFF, transmit function
+ * should stop sending data.
+ *
+ * @_CAIF_MODEMCMD_PHYIF_USEFULL: Notify physical layer that it is in use
+ *
+ * @_CAIF_MODEMCMD_PHYIF_USELESS: Notify physical layer that it is
+ * no longer in use.
+ *
+ * These are requests sent 'downwards' in the stack.
+ * Flow ON, OFF can be indicated to the modem.
+ */
+enum caif_modemcmd {
+ CAIF_MODEMCMD_FLOW_ON_REQ = 0,
+ CAIF_MODEMCMD_FLOW_OFF_REQ = 1,
+ _CAIF_MODEMCMD_PHYIF_USEFULL = 3,
+ _CAIF_MODEMCMD_PHYIF_USELESS = 4
+};
+
+/**
+ * enum caif_direction - CAIF Packet Direction.
+ * Indicate if a packet is to be sent out or to be received in.
+ * @CAIF_DIR_IN: Incoming packet received.
+ * @CAIF_DIR_OUT: Outgoing packet to be transmitted.
+ */
+enum caif_direction {
+ CAIF_DIR_IN = 0,
+ CAIF_DIR_OUT = 1
+};
+
+/**
+ * struct cflayer - CAIF Stack layer.
+ * Defines the framework for the CAIF Core Stack.
+ * @up: Pointer up to the layer above.
+ * @dn: Pointer down to the layer below.
+ * @node: List node used when layer participate in a list.
+ * @receive: Packet receive function.
+ * @transmit: Packet transmit funciton.
+ * @ctrlcmd: Used for control signalling upwards in the stack.
+ * @modemcmd: Used for control signaling downwards in the stack.
+ * @prio: Priority of this layer.
+ * @id: The identity of this layer
+ * @type: The type of this layer
+ * @name: Name of the layer.
+ *
+ * This structure defines the layered structure in CAIF.
+ *
+ * It defines CAIF layering structure, used by all CAIF Layers and the
+ * layers interfacing CAIF.
+ *
+ * In order to integrate with CAIF an adaptation layer on top of the CAIF stack
+ * and PHY layer below the CAIF stack
+ * must be implemented. These layer must follow the design principles below.
+ *
+ * Principles for layering of protocol layers:
+ * -All layers must use this structure. If embedding it, then place this
+ * structure first in the layer specific structure.
+ *
+ * - Each layer should not depend on any others layer private data.
+ *
+ * - In order to send data upwards do
+ * layer->up->receive(layer->up, packet);
+ *
+ * -In order to send data downwards do
+ * layer->dn->transmit(layer->dn, info, packet);
+ */
+struct cflayer {
+ struct cflayer *up;
+ struct cflayer *dn;
+ struct list_head node;
+
+ /*
+ * receive() - Receive Function.
+ * Contract: Each layer must implement a receive function passing the
+ * CAIF packets upwards in the stack.
+ * Packet handling rules:
+ * -# The CAIF packet (cfpkt) cannot be accessed after
+ * passing it to the next layer using up->receive().
+ * -# If parsing of the packet fails, the packet must be
+ * destroyed and -1 returned from the function.
+ * -# If parsing succeeds (and above layers return OK) then
+ * the function must return a value > 0.
+ *
+ * Returns result < 0 indicates an error, 0 or positive value
+ * indicates success.
+ *
+ * @layr: Pointer to the current layer the receive function is
+ * implemented for (this pointer).
+ * @cfpkt: Pointer to CaifPacket to be handled.
+ */
+ int (*receive)(struct cflayer *layr, struct cfpkt *cfpkt);
+
+ /*
+ * transmit() - Transmit Function.
+ * Contract: Each layer must implement a transmit function passing the
+ * CAIF packet downwards in the stack.
+ * Packet handling rules:
+ * -# The CAIF packet (cfpkt) ownership is passed to the
+ * transmit function. This means that the the packet
+ * cannot be accessed after passing it to the below
+ * layer using dn->transmit().
+ *
+ * -# If transmit fails, however, the ownership is returned
+ * to thecaller. The caller of "dn->transmit()" must
+ * destroy or resend packet.
+ *
+ * -# Return value less than zero means error, zero or
+ * greater than zero means OK.
+ *
+ * result < 0 indicates an error, 0 or positive value
+ * indicate success.
+ *
+ * @layr: Pointer to the current layer the receive function
+ * isimplemented for (this pointer).
+ * @cfpkt: Pointer to CaifPacket to be handled.
+ */
+ int (*transmit) (struct cflayer *layr, struct cfpkt *cfpkt);
+
+ /*
+ * cttrlcmd() - Control Function upwards in CAIF Stack.
+ * Used for signaling responses (CAIF_CTRLCMD_*_RSP)
+ * and asynchronous events from the modem (CAIF_CTRLCMD_*_IND)
+ *
+ * @layr: Pointer to the current layer the receive function
+ * is implemented for (this pointer).
+ * @ctrl: Control Command.
+ */
+ void (*ctrlcmd) (struct cflayer *layr, enum caif_ctrlcmd ctrl,
+ int phyid);
+
+ /*
+ * modemctrl() - Control Function used for controlling the modem.
+ * Used to signal down-wards in the CAIF stack.
+ * Returns 0 on success, < 0 upon failure.
+ *
+ * @layr: Pointer to the current layer the receive function
+ * is implemented for (this pointer).
+ * @ctrl: Control Command.
+ */
+ int (*modemcmd) (struct cflayer *layr, enum caif_modemcmd ctrl);
+
+ unsigned short prio;
+ unsigned int id;
+ unsigned int type;
+ char name[CAIF_LAYER_NAME_SZ];
+};
+
+/**
+ * layer_set_up() - Set the up pointer for a specified layer.
+ * @layr: Layer where up pointer shall be set.
+ * @above: Layer above.
+ */
+#define layer_set_up(layr, above) ((layr)->up = (struct cflayer *)(above))
+
+/**
+ * layer_set_dn() - Set the down pointer for a specified layer.
+ * @layr: Layer where down pointer shall be set.
+ * @below: Layer below.
+ */
+#define layer_set_dn(layr, below) ((layr)->dn = (struct cflayer *)(below))
+
+
+
+/**
+ * struct dev_info - Physical Device info information about physical layer.
+ * @dev: Pointer to native physical device.
+ * @id: Physical ID of the physical connection used by the
+ * logical CAIF connection. Used by service layers to
+ * identify their physical id to Caif MUX (CFMUXL)so
+ * that the MUX can add the correct physical ID to the
+ * packet.
+ */
+struct dev_info {
+ void *dev;
+ unsigned int id;
+};
+
+/**
+ * struct caif_payload_info - Payload information embedded in packet (sk_buff).
+ *
+ * @dev_info: Information about the receiving device.
+ *
+ * @hdr_len: Header length, used to align pay load on 32bit boundary.
+ *
+ * @channel_id: Channel ID of the logical CAIF connection.
+ * Used by mux to insert channel id into the caif packet.
+ */
+struct caif_payload_info {
+ struct dev_info *dev_info;
+ unsigned short hdr_len;
+ unsigned short channel_id;
+};
+
+#endif /* CAIF_LAYER_H_ */
diff --git a/include/net/caif/cfcnfg.h b/include/net/caif/cfcnfg.h
new file mode 100644
index 0000000..55c3027
--- /dev/null
+++ b/include/net/caif/cfcnfg.h
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CFCNFG_H_
+#define CFCNFG_H_
+#include <linux/spinlock.h>
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfctrl.h>
+
+struct cfcnfg;
+
+/**
+ * enum cfcnfg_phy_type - Types of physical layers defined in CAIF Stack
+ *
+ * @CFPHYTYPE_FRAG: Fragmented frames physical interface.
+ * @CFPHYTYPE_CAIF: Generic CAIF physical interface
+ */
+enum cfcnfg_phy_type {
+ CFPHYTYPE_FRAG = 1,
+ CFPHYTYPE_CAIF,
+ CFPHYTYPE_MAX
+};
+
+/**
+ * enum cfcnfg_phy_preference - Physical preference HW Abstraction
+ *
+ * @CFPHYPREF_UNSPECIFIED: Default physical interface
+ *
+ * @CFPHYPREF_LOW_LAT: Default physical interface for low-latency
+ * traffic
+ * @CFPHYPREF_HIGH_BW: Default physical interface for high-bandwidth
+ * traffic
+ * @CFPHYPREF_LOOP: TEST only Loopback interface simulating modem
+ * responses.
+ *
+ */
+enum cfcnfg_phy_preference {
+ CFPHYPREF_UNSPECIFIED,
+ CFPHYPREF_LOW_LAT,
+ CFPHYPREF_HIGH_BW,
+ CFPHYPREF_LOOP
+};
+
+/**
+ * cfcnfg_create() - Create the CAIF configuration object.
+ */
+struct cfcnfg *cfcnfg_create(void);
+
+/**
+ * cfcnfg_remove() - Remove the CFCNFG object
+ * @cfg: config object
+ */
+void cfcnfg_remove(struct cfcnfg *cfg);
+
+/**
+ * cfcnfg_add_phy_layer() - Adds a physical layer to the CAIF stack.
+ * @cnfg: Pointer to a CAIF configuration object, created by
+ * cfcnfg_create().
+ * @phy_type: Specifies the type of physical interface, e.g.
+ * CFPHYTYPE_FRAG.
+ * @dev: Pointer to link layer device
+ * @phy_layer: Specify the physical layer. The transmit function
+ * MUST be set in the structure.
+ * @phyid: The assigned physical ID for this layer, used in
+ * cfcnfg_add_adapt_layer to specify PHY for the link.
+ * @pref: The phy (link layer) preference.
+ * @fcs: Specify if checksum is used in CAIF Framing Layer.
+ * @stx: Specify if Start Of Frame eXtention is used.
+ */
+
+void
+cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
+ void *dev, struct cflayer *phy_layer, u16 *phyid,
+ enum cfcnfg_phy_preference pref,
+ bool fcs, bool stx);
+
+/**
+ * cfcnfg_del_phy_layer - Deletes an phy layer from the CAIF stack.
+ *
+ * @cnfg: Pointer to a CAIF configuration object, created by
+ * cfcnfg_create().
+ * @phy_layer: Adaptation layer to be removed.
+ */
+int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer);
+
+
+/**
+ * cfcnfg_del_adapt_layer - Deletes an adaptation layer from the CAIF stack.
+ *
+ * @cnfg: Pointer to a CAIF configuration object, created by
+ * cfcnfg_create().
+ * @adap_layer: Adaptation layer to be removed.
+ */
+int cfcnfg_del_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer);
+
+
+/**
+ * cfcnfg_add_adaptation_layer - Add an adaptation layer to the CAIF stack.
+ *
+ * The adaptation Layer is where the interface to application or higher-level
+ * driver functionality is implemented.
+ *
+ * @cnfg: Pointer to a CAIF configuration object, created by
+ * cfcnfg_create().
+ * @param: Link setup parameters.
+ * @adap_layer: Specify the adaptation layer; the receive and
+ * flow-control functions MUST be set in the structure.
+ *
+ */
+int
+cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg,
+ struct cfctrl_link_param *param,
+ struct cflayer *adap_layer);
+/**
+ * cfcnfg_get_phyid() - Get physical ID, given type.
+ * Returns one of the physical interfaces matching the given type.
+ * Zero if no match is found.
+ * @cnfg: Configuration object
+ * @phy_pref: Caif Link Layer preference
+ */
+struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg,
+ enum cfcnfg_phy_preference phy_pref);
+
+/**
+ * cfcnfg_get_named() - Get the Physical Identifier of CAIF Link Layer
+ * @cnfg: Configuration object
+ * @name: Name of the Physical Layer (Caif Link Layer)
+ */
+int cfcnfg_get_named(struct cfcnfg *cnfg, char *name);
+
+#endif /* CFCNFG_H_ */
diff --git a/include/net/caif/cfctrl.h b/include/net/caif/cfctrl.h
new file mode 100644
index 0000000..d10d4eb
--- /dev/null
+++ b/include/net/caif/cfctrl.h
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CFCTRL_H_
+#define CFCTRL_H_
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfsrvl.h>
+
+/* CAIF Control packet commands */
+enum cfctrl_cmd {
+ CFCTRL_CMD_LINK_SETUP = 0,
+ CFCTRL_CMD_LINK_DESTROY = 1,
+ CFCTRL_CMD_LINK_ERR = 2,
+ CFCTRL_CMD_ENUM = 3,
+ CFCTRL_CMD_SLEEP = 4,
+ CFCTRL_CMD_WAKE = 5,
+ CFCTRL_CMD_LINK_RECONF = 6,
+ CFCTRL_CMD_START_REASON = 7,
+ CFCTRL_CMD_RADIO_SET = 8,
+ CFCTRL_CMD_MODEM_SET = 9,
+ CFCTRL_CMD_MASK = 0xf
+};
+
+/* Channel types */
+enum cfctrl_srv {
+ CFCTRL_SRV_DECM = 0,
+ CFCTRL_SRV_VEI = 1,
+ CFCTRL_SRV_VIDEO = 2,
+ CFCTRL_SRV_DBG = 3,
+ CFCTRL_SRV_DATAGRAM = 4,
+ CFCTRL_SRV_RFM = 5,
+ CFCTRL_SRV_UTIL = 6,
+ CFCTRL_SRV_MASK = 0xf
+};
+
+#define CFCTRL_RSP_BIT 0x20
+#define CFCTRL_ERR_BIT 0x10
+
+struct cfctrl_rsp {
+ void (*linksetup_rsp)(struct cflayer *layer, u8 linkid,
+ enum cfctrl_srv serv, u8 phyid,
+ struct cflayer *adapt_layer);
+ void (*linkdestroy_rsp)(struct cflayer *layer, u8 linkid,
+ struct cflayer *client_layer);
+ void (*linkerror_ind)(void);
+ void (*enum_rsp)(void);
+ void (*sleep_rsp)(void);
+ void (*wake_rsp)(void);
+ void (*restart_rsp)(void);
+ void (*radioset_rsp)(void);
+ void (*reject_rsp)(struct cflayer *layer, u8 linkid,
+ struct cflayer *client_layer);;
+};
+
+/* Link Setup Parameters for CAIF-Links. */
+struct cfctrl_link_param {
+ enum cfctrl_srv linktype;/* (T3,T0) Type of Channel */
+ u8 priority; /* (P4,P0) Priority of the channel */
+ u8 phyid; /* (U2-U0) Physical interface to connect */
+ u8 endpoint; /* (E1,E0) Endpoint for data channels */
+ u8 chtype; /* (H1,H0) Channel-Type, applies to
+ * VEI, DEBUG */
+ union {
+ struct {
+ u8 connid; /* (D7,D0) Video LinkId */
+ } video;
+
+ struct {
+ u32 connid; /* (N31,Ngit0) Connection ID used
+ * for Datagram */
+ } datagram;
+
+ struct {
+ u32 connid; /* Connection ID used for RFM */
+ char volume[20]; /* Volume to mount for RFM */
+ } rfm; /* Configuration for RFM */
+
+ struct {
+ u16 fifosize_kb; /* Psock FIFO size in KB */
+ u16 fifosize_bufs; /* Psock # signal buffers */
+ char name[16]; /* Name of the PSOCK service */
+ u8 params[255]; /* Link setup Parameters> */
+ u16 paramlen; /* Length of Link Setup
+ * Parameters */
+ } utility; /* Configuration for Utility Links (Psock) */
+ } u;
+};
+
+/* This structure is used internally in CFCTRL */
+struct cfctrl_request_info {
+ int sequence_no;
+ enum cfctrl_cmd cmd;
+ u8 channel_id;
+ struct cfctrl_link_param param;
+ struct cfctrl_request_info *next;
+ struct cflayer *client_layer;
+};
+
+struct cfctrl {
+ struct cfsrvl serv;
+ struct cfctrl_rsp res;
+ atomic_t req_seq_no;
+ atomic_t rsp_seq_no;
+ struct cfctrl_request_info *first_req;
+ spinlock_t info_list_lock;
+#ifndef CAIF_NO_LOOP
+ u8 loop_linkid;
+ int loop_linkused[256];
+ spinlock_t loop_linkid_lock;
+#endif
+
+};
+
+void cfctrl_enum_req(struct cflayer *cfctrl, u8 physlinkid);
+void cfctrl_linkup_request(struct cflayer *cfctrl,
+ struct cfctrl_link_param *param,
+ struct cflayer *user_layer);
+int cfctrl_linkdown_req(struct cflayer *cfctrl, u8 linkid,
+ struct cflayer *client);
+void cfctrl_sleep_req(struct cflayer *cfctrl);
+void cfctrl_wake_req(struct cflayer *cfctrl);
+void cfctrl_getstartreason_req(struct cflayer *cfctrl);
+struct cflayer *cfctrl_create(void);
+void cfctrl_set_dnlayer(struct cflayer *this, struct cflayer *dn);
+void cfctrl_set_uplayer(struct cflayer *this, struct cflayer *up);
+struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer);
+bool cfctrl_req_eq(struct cfctrl_request_info *r1,
+ struct cfctrl_request_info *r2);
+void cfctrl_insert_req(struct cfctrl *ctrl,
+ struct cfctrl_request_info *req);
+struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl,
+ struct cfctrl_request_info *req);
+#endif /* CFCTRL_H_ */
diff --git a/include/net/caif/cffrml.h b/include/net/caif/cffrml.h
new file mode 100644
index 0000000..2ee2fe3
--- /dev/null
+++ b/include/net/caif/cffrml.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CFFRML_H_
+#define CFFRML_H_
+#include <net/caif/caif_layer.h>
+
+struct cffrml;
+struct cflayer *cffrml_create(u16 phyid, bool DoFCS);
+void cffrml_set_uplayer(struct cflayer *this, struct cflayer *up);
+void cffrml_set_dnlayer(struct cflayer *this, struct cflayer *dn);
+void cffrml_destroy(struct cflayer *layer);
+
+#endif /* CFFRML_H_ */
diff --git a/include/net/caif/cfmuxl.h b/include/net/caif/cfmuxl.h
new file mode 100644
index 0000000..2daf726
--- /dev/null
+++ b/include/net/caif/cfmuxl.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CFMUXL_H_
+#define CFMUXL_H_
+#include <net/caif/caif_layer.h>
+
+struct cfsrvl;
+struct cffrml;
+
+struct cflayer *cfmuxl_create(void);
+int cfmuxl_set_uplayer(struct cflayer *layr, struct cflayer *up, u8 linkid);
+struct cflayer *cfmuxl_remove_dnlayer(struct cflayer *layr, u8 phyid);
+int cfmuxl_set_dnlayer(struct cflayer *layr, struct cflayer *up, u8 phyid);
+struct cflayer *cfmuxl_remove_uplayer(struct cflayer *layr, u8 linkid);
+bool cfmuxl_is_phy_inuse(struct cflayer *layr, u8 phyid);
+u8 cfmuxl_get_phyid(struct cflayer *layr, __u8 channel_id);
+
+#endif /* CFMUXL_H_ */
diff --git a/include/net/caif/cfpkt.h b/include/net/caif/cfpkt.h
new file mode 100644
index 0000000..4d32156
--- /dev/null
+++ b/include/net/caif/cfpkt.h
@@ -0,0 +1,274 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CFPKT_H_
+#define CFPKT_H_
+#include <net/caif/caif_layer.h>
+#include <linux/types.h>
+struct cfpkt;
+
+/* Create a CAIF packet.
+ * len: Length of packet to be created
+ * @return New packet.
+ */
+struct cfpkt *cfpkt_create(u16 len);
+
+/* Create a CAIF packet.
+ * data Data to copy.
+ * len Length of packet to be created
+ * @return New packet.
+ */
+struct cfpkt *cfpkt_create_uplink(const unsigned char *data, unsigned int len);
+/*
+ * Destroy a CAIF Packet.
+ * pkt Packet to be destoyed.
+ */
+void cfpkt_destroy(struct cfpkt *pkt);
+
+/*
+ * Extract header from packet.
+ *
+ * pkt Packet to extract header data from.
+ * data Pointer to copy the header data into.
+ * len Length of head data to copy.
+ * @return zero on success and error code upon failure
+ */
+int cfpkt_extr_head(struct cfpkt *pkt, void *data, u16 len);
+
+/*
+ * Peek header from packet.
+ * Reads data from packet without changing packet.
+ *
+ * pkt Packet to extract header data from.
+ * data Pointer to copy the header data into.
+ * len Length of head data to copy.
+ * @return zero on success and error code upon failure
+ */
+int cfpkt_peek_head(struct cfpkt *pkt, void *data, u16 len);
+
+/*
+ * Extract header from trailer (end of packet).
+ *
+ * pkt Packet to extract header data from.
+ * data Pointer to copy the trailer data into.
+ * len Length of header data to copy.
+ * @return zero on success and error code upon failure
+ */
+int cfpkt_extr_trail(struct cfpkt *pkt, void *data, u16 len);
+
+/*
+ * Add header to packet.
+ *
+ *
+ * pkt Packet to add header data to.
+ * data Pointer to data to copy into the header.
+ * len Length of header data to copy.
+ * @return zero on success and error code upon failure
+ */
+int cfpkt_add_head(struct cfpkt *pkt, const void *data, u16 len);
+
+/*
+ * Add trailer to packet.
+ *
+ *
+ * pkt Packet to add trailer data to.
+ * data Pointer to data to copy into the trailer.
+ * len Length of trailer data to copy.
+ * @return zero on success and error code upon failure
+ */
+int cfpkt_add_trail(struct cfpkt *pkt, const void *data, u16 len);
+
+/*
+ * Pad trailer on packet.
+ * Moves data pointer in packet, no content copied.
+ *
+ * pkt Packet in which to pad trailer.
+ * len Length of padding to add.
+ * @return zero on success and error code upon failure
+ */
+int cfpkt_pad_trail(struct cfpkt *pkt, u16 len);
+
+/*
+ * Add a single byte to packet body (tail).
+ *
+ * pkt Packet in which to add byte.
+ * data Byte to add.
+ * @return zero on success and error code upon failure
+ */
+int cfpkt_addbdy(struct cfpkt *pkt, const u8 data);
+
+/*
+ * Add a data to packet body (tail).
+ *
+ * pkt Packet in which to add data.
+ * data Pointer to data to copy into the packet body.
+ * len Length of data to add.
+ * @return zero on success and error code upon failure
+ */
+int cfpkt_add_body(struct cfpkt *pkt, const void *data, u16 len);
+
+/*
+ * Checks whether there are more data to process in packet.
+ * pkt Packet to check.
+ * @return true if more data are available in packet false otherwise
+ */
+bool cfpkt_more(struct cfpkt *pkt);
+
+/*
+ * Checks whether the packet is erroneous,
+ * i.e. if it has been attempted to extract more data than available in packet
+ * or writing more data than has been allocated in cfpkt_create().
+ * pkt Packet to check.
+ * @return true on error false otherwise
+ */
+bool cfpkt_erroneous(struct cfpkt *pkt);
+
+/*
+ * Get the packet length.
+ * pkt Packet to get length from.
+ * @return Number of bytes in packet.
+ */
+u16 cfpkt_getlen(struct cfpkt *pkt);
+
+/*
+ * Set the packet length, by adjusting the trailer pointer according to length.
+ * pkt Packet to set length.
+ * len Packet length.
+ * @return Number of bytes in packet.
+ */
+int cfpkt_setlen(struct cfpkt *pkt, u16 len);
+
+/*
+ * cfpkt_append - Appends a packet's data to another packet.
+ * dstpkt: Packet to append data into, WILL BE FREED BY THIS FUNCTION
+ * addpkt: Packet to be appended and automatically released,
+ * WILL BE FREED BY THIS FUNCTION.
+ * expectlen: Packet's expected total length. This should be considered
+ * as a hint.
+ * NB: Input packets will be destroyed after appending and cannot be used
+ * after calling this function.
+ * @return The new appended packet.
+ */
+struct cfpkt *cfpkt_append(struct cfpkt *dstpkt, struct cfpkt *addpkt,
+ u16 expectlen);
+
+/*
+ * cfpkt_split - Split a packet into two packets at the specified split point.
+ * pkt: Packet to be split (will contain the first part of the data on exit)
+ * pos: Position to split packet in two parts.
+ * @return The new packet, containing the second part of the data.
+ */
+struct cfpkt *cfpkt_split(struct cfpkt *pkt, u16 pos);
+
+/*
+ * Iteration function, iterates the packet buffers from start to end.
+ *
+ * Checksum iteration function used to iterate buffers
+ * (we may have packets consisting of a chain of buffers)
+ * pkt: Packet to calculate checksum for
+ * iter_func: Function pointer to iteration function
+ * chks: Checksum calculated so far.
+ * buf: Pointer to the buffer to checksum
+ * len: Length of buf.
+ * data: Initial checksum value.
+ * @return Checksum of buffer.
+ */
+
+u16 cfpkt_iterate(struct cfpkt *pkt,
+ u16 (*iter_func)(__u16 chks, void *buf, __u16 len),
+ u16 data);
+
+/* Append by giving user access to packet buffer
+ * cfpkt Packet to append to
+ * buf Buffer inside pkt that user shall copy data into
+ * buflen Length of buffer and number of bytes added to packet
+ * @return 0 on error, 1 on success
+ */
+int cfpkt_raw_append(struct cfpkt *cfpkt, void **buf, unsigned int buflen);
+
+/* Extract by giving user access to packet buffer
+ * cfpkt Packet to extract from
+ * buf Buffer inside pkt that user shall copy data from
+ * buflen Length of buffer and number of bytes removed from packet
+ * @return 0 on error, 1 on success
+ */
+int cfpkt_raw_extract(struct cfpkt *cfpkt, void **buf, unsigned int buflen);
+
+/* Map from a "native" packet (e.g. Linux Socket Buffer) to a CAIF packet.
+ * dir - Direction indicating whether this packet is to be sent or received.
+ * nativepkt - The native packet to be transformed to a CAIF packet
+ * @return The mapped CAIF Packet CFPKT.
+ */
+struct cfpkt *cfpkt_fromnative(enum caif_direction dir, void *nativepkt);
+
+/* Map from a CAIF packet to a "native" packet (e.g. Linux Socket Buffer).
+ * pkt - The CAIF packet to be transformed into a "native" packet.
+ * @return The native packet transformed from a CAIF packet.
+ */
+void *cfpkt_tonative(struct cfpkt *pkt);
+
+/*
+ * Insert a packet in the packet queue.
+ * pktq Packet queue to insert into
+ * pkt Packet to be inserted in queue
+ * prio Priority of packet
+ */
+void cfpkt_queue(struct cfpktq *pktq, struct cfpkt *pkt,
+ unsigned short prio);
+
+/*
+ * Remove a packet from the packet queue.
+ * pktq Packet queue to fetch packets from.
+ * @return Dequeued packet.
+ */
+struct cfpkt *cfpkt_dequeue(struct cfpktq *pktq);
+
+/*
+ * Peek into a packet from the packet queue.
+ * pktq Packet queue to fetch packets from.
+ * @return Peeked packet.
+ */
+struct cfpkt *cfpkt_qpeek(struct cfpktq *pktq);
+
+/*
+ * Initiates the packet queue.
+ * @return Pointer to new packet queue.
+ */
+struct cfpktq *cfpktq_create(void);
+
+/*
+ * Get the number of packets in the queue.
+ * pktq Packet queue to fetch count from.
+ * @return Number of packets in queue.
+ */
+int cfpkt_qcount(struct cfpktq *pktq);
+
+/*
+ * Put content of packet into buffer for debuging purposes.
+ * pkt Packet to copy data from
+ * buf Buffer to copy data into
+ * buflen Length of data to copy
+ * @return Pointer to copied data
+ */
+char *cfpkt_log_pkt(struct cfpkt *pkt, char *buf, int buflen);
+
+/*
+ * Clones a packet and releases the original packet.
+ * This is used for taking ownership of a packet e.g queueing.
+ * pkt Packet to clone and release.
+ * @return Cloned packet.
+ */
+struct cfpkt *cfpkt_clone_release(struct cfpkt *pkt);
+
+
+/*
+ * Returns packet information for a packet.
+ * pkt Packet to get info from;
+ * @return Packet information
+ */
+struct caif_payload_info *cfpkt_info(struct cfpkt *pkt);
+/*! @} */
+#endif /* CFPKT_H_ */
diff --git a/include/net/caif/cfserl.h b/include/net/caif/cfserl.h
new file mode 100644
index 0000000..33644f4
--- /dev/null
+++ b/include/net/caif/cfserl.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CFSERL_H_
+#define CFSERL_H_
+#include <net/caif/caif_layer.h>
+
+struct cflayer *cfserl_create(int type, int instance, bool use_stx);
+
+#endif /* CFSERL_H_ */
diff --git a/include/net/caif/cfsrvl.h b/include/net/caif/cfsrvl.h
new file mode 100644
index 0000000..b2a12db
--- /dev/null
+++ b/include/net/caif/cfsrvl.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CFSRVL_H_
+#define CFSRVL_H_
+#include <linux/list.h>
+#include <linux/stddef.h>
+#include <linux/types.h>
+struct cfsrvl {
+ struct cflayer layer;
+ bool open;
+ bool phy_flow_on;
+ bool modem_flow_on;
+ struct dev_info dev_info;
+};
+
+struct cflayer *cfvei_create(u8 linkid, struct dev_info *dev_info);
+struct cflayer *cfdgml_create(u8 linkid, struct dev_info *dev_info);
+struct cflayer *cfutill_create(u8 linkid, struct dev_info *dev_info);
+struct cflayer *cfvidl_create(u8 linkid, struct dev_info *dev_info);
+struct cflayer *cfrfml_create(u8 linkid, struct dev_info *dev_info);
+struct cflayer *cfdbgl_create(u8 linkid, struct dev_info *dev_info);
+bool cfsrvl_phyid_match(struct cflayer *layer, int phyid);
+void cfservl_destroy(struct cflayer *layer);
+void cfsrvl_init(struct cfsrvl *service,
+ u8 channel_id,
+ struct dev_info *dev_info);
+bool cfsrvl_ready(struct cfsrvl *service, int *err);
+u8 cfsrvl_getphyid(struct cflayer *layer);
+
+#endif /* CFSRVL_H_ */
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 02/12] net-caif: add CAIF socket and configuration headers
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-2-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Add CAIF types for Socket Address, Socket Options,
and configuration parameters for the GPRS IP network interface.
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
include/linux/caif/caif_socket.h | 164 ++++++++++++++++++++++++++++++++++++++
include/linux/caif/if_caif.h | 34 ++++++++
2 files changed, 198 insertions(+), 0 deletions(-)
diff --git a/include/linux/caif/caif_socket.h b/include/linux/caif/caif_socket.h
new file mode 100644
index 0000000..5038183
--- /dev/null
+++ b/include/linux/caif/caif_socket.h
@@ -0,0 +1,164 @@
+/* linux/caif_socket.h
+ * CAIF Definitions for CAIF socket and network layer
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/ sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef _LINUX_CAIF_SOCKET_H
+#define _LINUX_CAIF_SOCKET_H
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#include <linux/socket.h>
+#else
+#include <sys/types.h>
+#include <sys/socket.h>
+#endif
+
+
+/**
+ * enum caif_link_selector - Physical Link Selection.
+ * @CAIF_LINK_HIGH_BANDW: Physical interface for high-bandwidth
+ * traffic.
+ * @CAIF_LINK_LOW_LATENCY: Physical interface for low-latency
+ * traffic.
+ *
+ * CAIF Link Layers can register their link properties.
+ * This enum is used for choosing between CAIF Link Layers when
+ * setting up CAIF Channels when multiple CAIF Link Layers exists.
+ */
+enum caif_link_selector {
+ CAIF_LINK_HIGH_BANDW,
+ CAIF_LINK_LOW_LATENCY
+};
+
+/**
+ * enum caif_channel_priority - CAIF channel priorities.
+ *
+ * @CAIF_PRIO_MIN: Min priority for a channel.
+ * @CAIF_PRIO_LOW: Low-priority channel.
+ * @CAIF_PRIO_NORMAL: Normal/default priority level.
+ * @CAIF_PRIO_HIGH: High priority level
+ * @CAIF_PRIO_MAX: Max priority for channel
+ *
+ * Priority can be set on CAIF Channels in order to
+ * prioritize between traffic on different CAIF Channels.
+ * These priority levels are recommended, but the priority value
+ * is not restricted to the values defined in this enum, any value
+ * between CAIF_PRIO_MIN and CAIF_PRIO_MAX could be used.
+ */
+enum caif_channel_priority {
+ CAIF_PRIO_MIN = 0x01,
+ CAIF_PRIO_LOW = 0x04,
+ CAIF_PRIO_NORMAL = 0x0f,
+ CAIF_PRIO_HIGH = 0x14,
+ CAIF_PRIO_MAX = 0x1F
+};
+
+/**
+ * enum caif_protocol_type - CAIF Channel type.
+ * @CAIFPROTO_AT: Classic AT channel.
+ * @CAIFPROTO_DATAGRAM: Datagram channel.
+ * @CAIFPROTO_DATAGRAM_LOOP: Datagram loopback channel, used for testing.
+ * @CAIFPROTO_UTIL: Utility (Psock) channel.
+ * @CAIFPROTO_RFM: Remote File Manager
+ *
+ * This enum defines the CAIF Channel type to be used. This defines
+ * the service to connect to on the modem.
+ */
+enum caif_protocol_type {
+ CAIFPROTO_AT,
+ CAIFPROTO_DATAGRAM,
+ CAIFPROTO_DATAGRAM_LOOP,
+ CAIFPROTO_UTIL,
+ CAIFPROTO_RFM,
+ _CAIFPROTO_MAX
+};
+#define CAIFPROTO_MAX _CAIFPROTO_MAX
+
+/**
+ * enum caif_at_type - AT Service Endpoint
+ * @CAIF_ATTYPE_PLAIN: Connects to a plain vanilla AT channel.
+ */
+enum caif_at_type {
+ CAIF_ATTYPE_PLAIN = 2
+};
+
+/**
+ * struct sockaddr_caif - the sockaddr structure for CAIF sockets.
+ * @u: Union of address data 'switched' by family.
+ * :
+ * @u.at: Applies when family = CAIFPROTO_AT.
+ *
+ * @u.at.type: Type of AT link to set up (enum caif_at_type).
+ *
+ * @u.util: Applies when family = CAIFPROTO_UTIL
+ *
+ * @u.util.service: Utility service name.
+ *
+ * @u.dgm: Applies when family = CAIFPROTO_DATAGRAM
+ *
+ * @u.dgm.connection_id: Datagram connection id.
+ *
+ * @u.dgm.nsapi: NSAPI of the PDP-Context.
+ *
+ * @u.rfm: Applies when family = CAIFPROTO_RFM
+ *
+ * @u.rfm.connection_id: Connection ID for RFM.
+ *
+ * @u.rfm.volume: Volume to mount.
+ *
+ * Description:
+ * This structure holds the connect parameters used for setting up a
+ * CAIF Channel. It defines the service to connect to on the modem.
+ */
+struct sockaddr_caif {
+ sa_family_t family;
+ union {
+ struct {
+ u_int8_t type; /* type: enum caif_at_type */
+ } at; /* CAIFPROTO_AT */
+ struct {
+ char service[16];
+ } util; /* CAIFPROTO_UTIL */
+ union {
+ u_int32_t connection_id;
+ u_int8_t nsapi;
+ } dgm; /* CAIFPROTO_DATAGRAM(_LOOP)*/
+ struct {
+ u_int32_t connection_id;
+ char volume[16];
+ } rfm; /* CAIFPROTO_RFM */
+ } u;
+};
+
+/**
+ * enum caif_socket_opts - CAIF option values for getsockopt and setsockopt.
+ *
+ * @CAIFSO_LINK_SELECT: Selector used if multiple CAIF Link layers are
+ * available. Either a high bandwidth
+ * link can be selected (CAIF_LINK_HIGH_BANDW) or
+ * or a low latency link (CAIF_LINK_LOW_LATENCY).
+ * This option is of type u_int32_t.
+ * Alternatively SO_BINDTODEVICE can be used.
+ *
+ * @CAIFSO_REQ_PARAM: Used to set the request parameters for a
+ * utility channel. (maximum 256 bytes). This
+ * option must be set before connecting.
+ *
+ * @CAIFSO_RSP_PARAM: Gets the response parameters for a utility
+ * channel. (maximum 256 bytes). This option
+ * is valid after a successful connect.
+ *
+ *
+ * This enum defines the CAIF Socket options to be used on a socket
+ *
+ */
+enum caif_socket_opts {
+ CAIFSO_LINK_SELECT = 127,
+ CAIFSO_REQ_PARAM = 128,
+ CAIFSO_RSP_PARAM = 129,
+};
+
+#endif /* _LINUX_CAIF_SOCKET_H */
diff --git a/include/linux/caif/if_caif.h b/include/linux/caif/if_caif.h
new file mode 100644
index 0000000..5e7eed4
--- /dev/null
+++ b/include/linux/caif/if_caif.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/ sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef IF_CAIF_H_
+#define IF_CAIF_H_
+#include <linux/sockios.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+
+/**
+ * enum ifla_caif - CAIF NetlinkRT parameters.
+ * @IFLA_CAIF_IPV4_CONNID: Connection ID for IPv4 PDP Context.
+ * The type of attribute is NLA_U32.
+ * @IFLA_CAIF_IPV6_CONNID: Connection ID for IPv6 PDP Context.
+ * The type of attribute is NLA_U32.
+ * @IFLA_CAIF_LOOPBACK: If different from zero, device is doing loopback
+ * The type of attribute is NLA_U8.
+ *
+ * When using RT Netlink to create, destroy or configure a CAIF IP interface,
+ * enum ifla_caif is used to specify the configuration attributes.
+ */
+enum ifla_caif {
+ __IFLA_CAIF_UNSPEC,
+ IFLA_CAIF_IPV4_CONNID,
+ IFLA_CAIF_IPV6_CONNID,
+ IFLA_CAIF_LOOPBACK,
+ __IFLA_CAIF_MAX
+};
+#define IFLA_CAIF_MAX (__IFLA_CAIF_MAX-1)
+
+#endif /*IF_CAIF_H_*/
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 00/12] net-caif: introducing CAIF protocol stack
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
This patch-set introduces the CAIF protocol Stack.
The "Communication CPU to Application CPU Interface" (CAIF) is a packet based
connection-oriented MUX protocol developed by ST-Ericsson for use with its
modems.
Changes since V4:
- Updated with feedback from Marcel Holtmann:
Removed socket option CAIFSO_NEXT_PACKET_LEN.
Removed socket option CAIFSO_MAX_PACKET_LEN.
Removed socket option CAIFSO_CHANNEL_ID.
Renamed struct layer to struct cflayer.
Renamed struct payload_info to struct caif_payload_info.
Changed socket option CAIFSO_REQ_PARAM into not using caif_param struct.
OVERVIEW:
* CAIF provides a socket interface which can be used to open virtual AT
channels, create and configure GPRS Data connections.
* A CAIF Network device is also provided for GPRS access.
This interface can be managed with RTNL.
* A kernel interface is provided allowing Kernel modules to use CAIF.
* A serial link layer layer implemented as a line discipline is currently
implemented. Other link interfaces may be contributed at a later stage.
RTNL
!
! +------+ +------+ +------+
! +------+! +------+! +------+!
! ! Sock !! !Kernel!! ! Net !!
! ! API !+ ! API !+ ! Dev !+ <- CAIF "Client" APIs
! +------+ +------! +------+
! ! ! !
! +----------!----------+
! +------+ <- CAIF Core Protocol Implementation
+-------> ! CAIF !
! Core !
+------+
+--------!--------+
! !
+------+ +-----+
! ldisc! ! ... ! <- Link Layer (Net Devices)
+------+ +-----+
!
+------+
! tty !
+------+
Please see Documentation/networking/CAIF for more documentation.
Based on net-next-2.6
Sjur Braendeland (12):
net-caif: add CAIF protocol definitions
net-caif: add CAIF socket and configuration headers
net-caif: add CAIF core protocol stack header files
net-caif: add CAIF Link layer device header files
net-caif: add CAIF core protocol stack
net-caif: add CAIF generic caif support functions
net-caif: add CAIF device registration functionality
net-caif: add CAIF socket implementation
net-caif: add CAIF netdevice
net-caif: add CAIF Kconfig and Makefiles
net-caif: add CAIF documentation
net-caif-driver: add CAIF serial driver (ldisc)
Documentation/networking/caif/Linux-CAIF.txt | 212 ++++
Documentation/networking/caif/README | 110 ++
drivers/net/Kconfig | 2 +
drivers/net/Makefile | 1 +
drivers/net/caif/Kconfig | 24 +
drivers/net/caif/Makefile | 14 +
drivers/net/caif/caif_serial.c | 463 +++++++++
include/linux/caif/caif_socket.h | 164 +++
include/linux/caif/if_caif.h | 34 +
include/linux/if_arp.h | 1 +
include/linux/if_ether.h | 1 +
include/linux/socket.h | 5 +-
include/linux/tty.h | 4 +-
include/net/caif/caif_dev.h | 91 ++
include/net/caif/caif_device.h | 57 +
include/net/caif/caif_layer.h | 283 +++++
include/net/caif/cfcnfg.h | 134 +++
include/net/caif/cfctrl.h | 136 +++
include/net/caif/cffrml.h | 17 +
include/net/caif/cfmuxl.h | 22 +
include/net/caif/cfpkt.h | 274 +++++
include/net/caif/cfserl.h | 13 +
include/net/caif/cfsrvl.h | 34 +
net/Kconfig | 2 +
net/Makefile | 1 +
net/caif/Kconfig | 48 +
net/caif/Makefile | 27 +
net/caif/caif_config_util.c | 88 ++
net/caif/caif_dev.c | 394 +++++++
net/caif/caif_socket.c | 1431 ++++++++++++++++++++++++++
net/caif/cfcnfg.c | 529 ++++++++++
net/caif/cfctrl.c | 711 +++++++++++++
net/caif/cfdbgl.c | 40 +
net/caif/cfdgml.c | 108 ++
net/caif/cffrml.c | 151 +++
net/caif/cfmuxl.c | 246 +++++
net/caif/cfpkt_skbuff.c | 595 +++++++++++
net/caif/cfrfml.c | 106 ++
net/caif/cfserl.c | 199 ++++
net/caif/cfsrvl.c | 185 ++++
net/caif/cfutill.c | 115 ++
net/caif/cfveil.c | 107 ++
net/caif/cfvidl.c | 65 ++
net/caif/chnl_net.c | 429 ++++++++
44 files changed, 7670 insertions(+), 3 deletions(-)
^ permalink raw reply
* [PATCH net-next-2.6 v5 04/12] net-caif: add CAIF Link layer device header files
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-4-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Header files for CAIF Link layer net-device,
and link-layer registration.
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
include/net/caif/caif_dev.h | 91 ++++++++++++++++++++++++++++++++++++++++
include/net/caif/caif_device.h | 57 +++++++++++++++++++++++++
2 files changed, 148 insertions(+), 0 deletions(-)
diff --git a/include/net/caif/caif_dev.h b/include/net/caif/caif_dev.h
new file mode 100644
index 0000000..f2ede2e
--- /dev/null
+++ b/include/net/caif/caif_dev.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/ sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CAIF_DEV_H_
+#define CAIF_DEV_H_
+
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfcnfg.h>
+#include <linux/caif/caif_socket.h>
+#include <linux/if.h>
+
+/**
+ * struct caif_param - CAIF parameters.
+ * @size: Length of data
+ * @data: Binary Data Blob
+ */
+struct caif_param {
+ u_int16_t size;
+ u_int8_t data[256];
+};
+
+/**
+ * caif_connect_request - Request data for CAIF channel setup.
+ * @sockaddr: Socket address to connect.
+ * @priority: Priority of the connection.
+ * @link_selector: Link selector (high bandwidth or low latency)
+ * @link_name: Name of the CAIF Link Layer to use.
+ *
+ * This struct is used when connecting a CAIF channel.
+ * It contains all CAIF channel configuration options.
+ */
+struct caif_connect_request {
+ int protocol;
+ struct sockaddr_caif sockaddr;
+ enum caif_channel_priority priority;
+ enum caif_link_selector link_selector;
+ char link_name[16];
+ struct caif_param param;
+};
+
+/**
+ * caif_connect_client - Connect a client to CAIF Core Stack.
+ * @config: Channel setup parameters, specifying what address
+ * to connect on the Modem.
+ * @client_layer: User implementation of client layer. This layer
+ * MUST have receive and control callback functions
+ * implemented.
+ *
+ * This function connects a CAIF channel. The Client must implement
+ * the struct cflayer. This layer represents the Client layer and holds
+ * receive functions and control callback functions. Control callback
+ * function will receive information about connect/disconnect responses,
+ * flow control etc (see enum caif_control).
+ * E.g. CAIF Socket will call this function for each socket it connects
+ * and have one client_layer instance for each socket.
+ */
+int caif_connect_client(struct caif_connect_request *config,
+ struct cflayer *client_layer);
+
+/**
+ * caif_disconnect_client - Disconnects a client from the CAIF stack.
+ *
+ * @client_layer: Client layer to be removed.
+ */
+int caif_disconnect_client(struct cflayer *client_layer);
+
+
+/**
+ * connect_req_to_link_param - Translate configuration parameters
+ * from socket format to internal format.
+ * @cnfg: Pointer to configuration handler
+ * @con_req: Configuration parameters supplied in function
+ * caif_connect_client
+ * @channel_setup_param: Parameters supplied to the CAIF Core stack for
+ * setting up channels.
+ *
+ */
+int connect_req_to_link_param(struct cfcnfg *cnfg,
+ struct caif_connect_request *con_req,
+ struct cfctrl_link_param *channel_setup_param);
+
+/**
+ * get_caif_conf() - Get the configuration handler.
+ */
+struct cfcnfg *get_caif_conf(void);
+
+
+#endif /* CAIF_DEV_H_ */
diff --git a/include/net/caif/caif_device.h b/include/net/caif/caif_device.h
new file mode 100644
index 0000000..ba22ee5
--- /dev/null
+++ b/include/net/caif/caif_device.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author: Sjur Brendeland/ sjur.brandeland@stericsson.com
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CAIF_DEVICE_H_
+#define CAIF_DEVICE_H_
+#include <linux/kernel.h>
+#include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/caif/caif_socket.h>
+#include <net/caif/caif_device.h>
+
+
+/**
+ * struct caif_dev_common - data shared between CAIF drivers and stack.
+ * @flowctrl: Flow Control callback function. This function is
+ * supplied by CAIF Core Stack and is used by CAIF
+ * Link Layer to send flow-stop to CAIF Core.
+ * The flow information will be distributed to all
+ * clients of CAIF.
+ *
+ * @link_select: Profile of device, either high-bandwidth or
+ * low-latency. This member is set by CAIF Link
+ * Layer Device in order to indicate if this device
+ * is a high bandwidth or low latency device.
+ *
+ * @use_frag: CAIF Frames may be fragmented.
+ * Is set by CAIF Link Layer in order to indicate if the
+ * interface receives fragmented frames that must be
+ * assembled by CAIF Core Layer.
+ *
+ * @use_fcs: Indicate if Frame CheckSum (fcs) is used.
+ * Is set if the physical interface is
+ * using Frame Checksum on the CAIF Frames.
+ *
+ * @use_stx: Indicate STart of frame eXtension (stx) in use.
+ * Is set if the CAIF Link Layer expects
+ * CAIF Frames to start with the STX byte.
+ *
+ * This structure is shared between the CAIF drivers and the CAIF stack.
+ * It is used by the device to register its behavior.
+ * CAIF Core layer must set the member flowctrl in order to supply
+ * CAIF Link Layer with the flow control function.
+ *
+ */
+ struct caif_dev_common {
+ void (*flowctrl)(struct net_device *net, int on);
+ enum caif_link_selector link_select;
+ int use_frag;
+ int use_fcs;
+ int use_stx;
+};
+
+#endif /* CAIF_DEVICE_H_ */
+
--
1.6.3.3
^ permalink raw reply related
* [PATCH net-next-2.6 v5 01/12] net-caif: add CAIF protocol definitions
From: sjur.brandeland @ 2010-03-01 2:09 UTC (permalink / raw)
To: netdev, davem, marcel
Cc: daniel.martensson, kaber, stefano.babic, randy.dunlap,
Sjur Braendeland
In-Reply-To: <1267409378-2082-1-git-send-email-sjur.brandeland@stericsson.com>
From: Sjur Braendeland <sjur.brandeland@stericsson.com>
Add CAIF definitions to existing header files.
Files: if_arp.h, if_ether.h, socket.h.
Types: ARPHRD_CAIF, ETH_P_CAIF, AF_CAIF, PF_CAIF, SOL_CAIF, N_CAIF
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
---
include/linux/if_arp.h | 1 +
include/linux/if_ether.h | 1 +
include/linux/socket.h | 5 ++++-
3 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/include/linux/if_arp.h b/include/linux/if_arp.h
index e80b7f8..6d722f4 100644
--- a/include/linux/if_arp.h
+++ b/include/linux/if_arp.h
@@ -90,6 +90,7 @@
#define ARPHRD_PHONET 820 /* PhoNet media type */
#define ARPHRD_PHONET_PIPE 821 /* PhoNet pipe header */
+#define ARPHRD_CAIF 822 /* CAIF media type */
#define ARPHRD_VOID 0xFFFF /* Void type, nothing is known */
#define ARPHRD_NONE 0xFFFE /* zero header length */
diff --git a/include/linux/if_ether.h b/include/linux/if_ether.h
index 299b412..bed7a46 100644
--- a/include/linux/if_ether.h
+++ b/include/linux/if_ether.h
@@ -109,6 +109,7 @@
#define ETH_P_TRAILER 0x001C /* Trailer switch tagging */
#define ETH_P_PHONET 0x00F5 /* Nokia Phonet frames */
#define ETH_P_IEEE802154 0x00F6 /* IEEE802.15.4 frame */
+#define ETH_P_CAIF 0x00F7 /* ST-Ericsson CAIF protocol */
/*
* This is an Ethernet frame header.
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 7b3aae2..960659b 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -189,7 +189,8 @@ struct ucred {
#define AF_ISDN 34 /* mISDN sockets */
#define AF_PHONET 35 /* Phonet sockets */
#define AF_IEEE802154 36 /* IEEE802154 sockets */
-#define AF_MAX 37 /* For now.. */
+#define AF_CAIF 37 /* CAIF sockets */
+#define AF_MAX 38 /* For now.. */
/* Protocol families, same as address families. */
#define PF_UNSPEC AF_UNSPEC
@@ -229,6 +230,7 @@ struct ucred {
#define PF_ISDN AF_ISDN
#define PF_PHONET AF_PHONET
#define PF_IEEE802154 AF_IEEE802154
+#define PF_CAIF AF_CAIF
#define PF_MAX AF_MAX
/* Maximum queue length specifiable by listen. */
@@ -300,6 +302,7 @@ struct ucred {
#define SOL_PNPIPE 275
#define SOL_RDS 276
#define SOL_IUCV 277
+#define SOL_CAIF 278
/* IPX options */
#define IPX_TYPE 1
--
1.6.3.3
^ permalink raw reply related
* Re: [PATCH V2] net: add accounting for socket backlog
From: David Miller @ 2010-03-01 2:10 UTC (permalink / raw)
To: yi.zhu; +Cc: netdev, eric.dumazet
In-Reply-To: <1267409328.23196.37.camel@debian>
From: Zhu Yi <yi.zhu@intel.com>
Date: Mon, 01 Mar 2010 10:08:48 +0800
> Yeah, I only considered about the normal case, that is the TCP frames
> are built and managed in the kernel.
You're not even considering the kernel case completely. It's just as
easy to modify the kernel to maliciously send frames in this way.
> If a user does frame generation himself, yes, the same problem could
> happen potentially for all protocols using backlog.
We need the protection for every protocol, please implement your
changes this way.
Thanks.
^ permalink raw reply
* Re: [1/13] bridge: Add IGMP snooping support
From: Herbert Xu @ 2010-03-01 2:08 UTC (permalink / raw)
To: David Miller; +Cc: netdev, shemminger
In-Reply-To: <20100228.005258.70198395.davem@davemloft.net>
On Sun, Feb 28, 2010 at 12:52:58AM -0800, David Miller wrote:
>
> bridge: Make IGMP snooping depend upon BRIDGE.
>
> Signed-off-by: David S. Miller <davem@davemloft.net>
Thanks a lot!
I'll get onto the bridge-utils stuff now.
Cheers,
--
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
^ permalink raw reply
* Re: [PATCH V2] net: add accounting for socket backlog
From: Zhu Yi @ 2010-03-01 2:08 UTC (permalink / raw)
To: David Miller; +Cc: netdev@vger.kernel.org, eric.dumazet@gmail.com
In-Reply-To: <20100226.040536.247057194.davem@davemloft.net>
On Fri, 2010-02-26 at 20:05 +0800, David Miller wrote:
> So remind me why TCP, or any other non-UDP protocol, won't
> intrinsically have this problem too?
If TCP ACKs are not received, the (closed) remote window prevents the
TCP sender to send more frames.
> It seems pretty trivial to do with any protocol, especially remotely,
> with a packet generator. The code in TCP, for example, which queues
> to the backlog, doesn't care about sequence numbers or anything like
> that.
>
> So you could spray a machine with the same TCP frame over and over
> again, as fast as possible, as long as it matches the socket identity.
>
> And in this way fill up the backlog endlessly and OOM the system.
Yeah, I only considered about the normal case, that is the TCP frames
are built and managed in the kernel. If a user does frame generation
himself, yes, the same problem could happen potentially for all
protocols using backlog.
Thanks,
-yi
^ permalink raw reply
* NFS mount attempts hangs with btrfs on server side
From: Jan Engelhardt @ 2010-03-01 0:41 UTC (permalink / raw)
To: linux-btrfs; +Cc: netdev
[-- Attachment #1: Type: TEXT/PLAIN, Size: 695 bytes --]
Greetings.
I am observing a case whereby NFS mounting seems to hang. A tcpdump
trace reveals that it retries forever RPC and exchanging NFS messages
without giving any warning or error message about what's wrong. There is
no firewall active, and the NFSserver (.1) has the client (.101)
unconditionally allowed.
It's a simple
mount -t nfs 192.168.100.1:/B/home/jengelh /home/jengelh -o tcp,intr,soft
/B is a btrfs volume. Mounting an ext4 volume over NFS instead completes
in a splitsecond.
Attached is the pcap file (->wireshark pretty display for deciphering).
It seems pretty much independent of the Linux kernel used; I can
reproduce this in both 2.6.33-rc8 as well as 2.6.31.12.
[-- Attachment #2: Type: APPLICATION/X-BZIP, Size: 6644 bytes --]
^ permalink raw reply
* Re: [PATCH 30/66] include/net/x25device.h: Checkpatch cleanup
From: andrew hendry @ 2010-02-28 22:30 UTC (permalink / raw)
To: David Miller; +Cc: andrea.gelmini, linux-kernel, linux-x25, netdev
In-Reply-To: <20100228.001130.226792131.davem@davemloft.net>
Acked-by: Andrew Hendry <andrew.hendry@gmail.com>
On Sun, Feb 28, 2010 at 7:11 PM, David Miller <davem@davemloft.net> wrote:
> From: Andrea Gelmini <andrea.gelmini@gelma.net>
> Date: Sat, 27 Feb 2010 17:51:11 +0100
>
>> include/net/x25device.h:13: ERROR: trailing whitespace
>>
>> Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
>
> Acked-by: David S. Miller <davem@davemloft.net>
>
^ permalink raw reply
* Re: [RFC][PATCH] ns: Syscalls for better namespace sharing control.
From: Daniel Lezcano @ 2010-02-28 22:05 UTC (permalink / raw)
To: Eric W. Biederman
Cc: Pavel Emelyanov, hadi, Patrick McHardy, Linux Netdev List,
containers, Netfilter Development Mailinglist, Ben Greear,
Serge Hallyn, Matt Helsley
In-Reply-To: <m1ljeempk6.fsf@fess.ebiederm.org>
Eric W. Biederman wrote:
> Pavel Emelyanov <xemul@parallels.com> writes:
>
>> Eric W. Biederman wrote:
>>> Pavel Emelyanov <xemul@parallels.com> writes:
>>>
>>>> Eric W. Biederman wrote:
>>>>> Pavel Emelyanov <xemul@parallels.com> writes:
>>>>>
>>>>>> Thanks. What's the problem with setns?
>>>>> joining a preexisting namespace is roughly the same problem as
>>>>> unsharing a namespace. We simply haven't figure out how to do it
>>>>> safely for the pid and the uid namespaces.
>>>> The pid may change after this for sure. What problems do you know
>>>> about it? What if we try to allocate the same PID in a new space
>>>> or return -EBUSY? This will be a good starting point. If we manage
>>>> to fix it later this will not break the API at all.
>>> Parentage. The pid is the identity of a process and all kinds of things
>>> make assumptions in all kinds of strange places. I don't see how
>>> waitpid can work if you change the pid.
>> Agree. But what if we enter a pid space, which is a subnamespace of a current
>> one? In that case parent will still see the task by its old pid. We can restrict
>> first version of entering with this rule as well and this restriction will not
>> block us in typical usecase (I mean enter a container from a host).
>
> When I was thinking about pid namespaces and unshare last time. The idea I came
> to was we unshare of the pid namespace should only affect which pid namespace
> your children are in.
>
> I remember that do that there were a few cases where you would have to access
> task->pid->pid_ns instead of task->nsproxy->pid_ns, but essentially it was pretty
> simple.
>
>>> glibc doesn't cope if you change someones pid.
>> OK, but what if we try to allocate the same pid returning -EBUSY on failure?
>>
>> My aim is to provide even a restricted enter. For most of the cases this
>> should work and make our lives easier. So two restrictions currently:
>> a) enter a sub namespace
>> b) allocate the same pid as we have now
>>
>> Hm? :)
>
> Replacing struct pid is guaranteed to do all kinds of nasty things with
> signal handling and the like, de_thread is nasty enough and you are talking
> something worse. So if we can change pid namespaces without changing
> the pid I am for it.
I agree with all the points you and Pavel you talked about but I don't
feel comfortable to have the current process to switch the pid namespace
because of the process tree hierarchy (what will be the parent of the
process when you enter the pid namespace for example). What is the
difference with the sys_bindns or the sys_hijack, proposed a couple of
years ago ?
I did a suggestion some weeks ago about a new syscall 'cloneat' where
the child process becomes the child of the targeted process specified in
the syscall. Maybe it would be interesting to replace the 'setns' by, or
add, a 'cloneat' syscall with the file descriptor passed as parameter.
The copy_process function shall not use the nsproxy of the caller but
the one provided in the fd argument.
The newly created process becomes the child of the process where we
retrieve the namespace with nsfd and this one have to 'waitpid' it, (the
caller of 'cloneat' can not wait it). It's a bit similar with the
CLONE_PARENT flag, except the creation order is inverted (the father
creates for the child).
So when entering the container, we specify the pid 1 of the container
which is usually a child reaper.
Does it make sense ?
Thanks
-- Daniel
^ permalink raw reply
* Re: Why does connector use a work queue???
From: Eric W. Biederman @ 2010-02-28 20:10 UTC (permalink / raw)
To: Evgeniy Polyakov; +Cc: linux-kernel, netdev
In-Reply-To: <20100228195243.GA15976@ioremap.net>
Evgeniy Polyakov <zbr@ioremap.net> writes:
> On Sat, Feb 27, 2010 at 06:57:02PM -0800, Eric W. Biederman (ebiederm@xmission.com) wrote:
>> These days netlink callbacks for messages happen in the context of the
>> process who sent the message. Things like permission checks are much
>> more complicated if we don't use that process context.
>>
>> I was looking at removing NETLINK_CB(skb).eff_cap but I discovered
>> that connected takes the netlink messages, them from their
>> perfectly good process context, and puts the into a workqueue
>> for reasons that are not apparent to me.
>
> Netlink was made synchronous rather recently and connector was not
> changed to take advantage of that. Previously it used work queue to
> postpone work processing into always-process context.
I suspected it was something like that but I want to be certain.
>> Unless I am misreading something we should just be able to remove the
>> work queues and greatly simplify the connector code.
>>
>> Something like:
>
> Idea looks very good, thank you, but it misses structure changes
> to eliminate now unneded members.
Right. I didn't trust myself to write a patch that would rip out half
of the connector code until I understood what the constraints were.
Eric
^ permalink raw reply
* Re: Why does connector use a work queue???
From: Evgeniy Polyakov @ 2010-02-28 19:52 UTC (permalink / raw)
To: Eric W. Biederman; +Cc: linux-kernel, netdev
In-Reply-To: <m1pr3qcbk1.fsf@fess.ebiederm.org>
On Sat, Feb 27, 2010 at 06:57:02PM -0800, Eric W. Biederman (ebiederm@xmission.com) wrote:
> These days netlink callbacks for messages happen in the context of the
> process who sent the message. Things like permission checks are much
> more complicated if we don't use that process context.
>
> I was looking at removing NETLINK_CB(skb).eff_cap but I discovered
> that connected takes the netlink messages, them from their
> perfectly good process context, and puts the into a workqueue
> for reasons that are not apparent to me.
Netlink was made synchronous rather recently and connector was not
changed to take advantage of that. Previously it used work queue to
postpone work processing into always-process context.
> Unless I am misreading something we should just be able to remove the
> work queues and greatly simplify the connector code.
>
> Something like:
Idea looks very good, thank you, but it misses structure changes
to eliminate now unneded members.
--
Evgeniy Polyakov
^ permalink raw reply
* Re: GSO / TSO offload dependency
From: Ben Hutchings @ 2010-02-28 19:30 UTC (permalink / raw)
To: raj ravi; +Cc: netdev
In-Reply-To: <de0a9dcb1002280900k728b241fyd72112defc0336ea@mail.gmail.com>
On Sun, 2010-02-28 at 22:30 +0530, raj ravi wrote:
> Hi,
> I m currently working on TSO feature in Linux network driver.
>
> Please correct my understanding.
>
> GSO - Generic segmentation offload - does not require any hardware support.
>
> TSO - TCP segmentation offload - does require hardward support
>
>
> Does TSO needs GSO to be turned on? OR in other words, can I have
> GSO disabled and TSO Enabled ?
> I beleive the code is tied between both offload...but not sure about
> the above possibility... please clarify.
Segmentation/fragmentation can be done in one of three places:
1. By the transport protocol, when constructing skbs to be queued
2. By the transport protocol, when an skb is about to be passed to the
device (enabled by NETIF_F_GSO)
3. By the device driver and hardware (enabled by NETIF_F_TSO,
NETIF_F_UFO, etc.)
Depending on the context, 'GSO' can refer either to case 2, or to both
cases 2 and 3. TSO does not need the NETIF_F_GSO feature to be turned
on, but in some contexts it is considered to be included in GSO.
> Just before handing over the packets to the Network driver,
> segmentation is carried out a call to dev_gso_segment ( ) function.
> Given GSO is enabled, It will take care about creating TCP and other
> protocol segments too, even if TSO is disabled.. ..correct ?
Correct.
> If hardware supports TSO, and If TSO and GSO are both enabled, ...
> what will happen to segmentation assembly by means of GSO ...
> GSO will not do any segmentatoin assembly for TCP alone and will do
> for other protocols ?? bit confused here? Please clarify.
Your understanding is correct.
Ben.
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
^ permalink raw reply
* [GIT PULL] vhost-net fixes for 2.6.34
From: Michael S. Tsirkin @ 2010-02-28 18:44 UTC (permalink / raw)
To: David Miller; +Cc: rusty, kvm, virtualization, netdev, linux-kernel, samudrala
David,
The following tree, based on net-next-2.6, includes
patches fixing issues with vhost-net.
Please pull them for 2.6.34.
Thanks!
The following changes since commit 655ffee284dfcf9a24ac0343f3e5ee6db85b85c5:
Jiri Pirko (1):
wireless: convert to use netdev_for_each_mc_addr
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost
Michael S. Tsirkin (3):
vhost: logging thinko fix
vhost: initialize log eventfd context pointer
vhost: fix get_user_pages_fast error handling
Sridhar Samudrala (1):
vhost-net: restart tx poll on sk_sndbuf full
drivers/vhost/net.c | 6 +++++-
drivers/vhost/vhost.c | 16 +++++++++++-----
2 files changed, 16 insertions(+), 6 deletions(-)
^ permalink raw reply
* GSO / TSO offload dependency
From: raj ravi @ 2010-02-28 17:00 UTC (permalink / raw)
To: netdev
Hi,
I m currently working on TSO feature in Linux network driver.
Please correct my understanding.
GSO - Generic segmentation offload - does not require any hardware support.
TSO - TCP segmentation offload - does require hardward support
Does TSO needs GSO to be turned on? OR in other words, can I have
GSO disabled and TSO Enabled ?
I beleive the code is tied between both offload...but not sure about
the above possibility... please clarify.
Just before handing over the packets to the Network driver,
segmentation is carried out a call to dev_gso_segment ( ) function.
Given GSO is enabled, It will take care about creating TCP and other
protocol segments too, even if TSO is disabled.. ..correct ?
If hardware supports TSO, and If TSO and GSO are both enabled, ...
what will happen to segmentation assembly by means of GSO ...
GSO will not do any segmentatoin assembly for TCP alone and will do
for other protocols ?? bit confused here? Please clarify.
Thx!
Kavi
^ permalink raw reply
* [PATCH 6/7] cxgb4: Add main driver file and driver Makefile
From: Dimitris Michailidis @ 2010-02-28 16:09 UTC (permalink / raw)
To: netdev
In-Reply-To: <1267373385-1665-6-git-send-email-dm@chelsio.com>
Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
---
drivers/net/cxgb4/Makefile | 7 +
drivers/net/cxgb4/cxgb4_main.c | 4234 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 4241 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/cxgb4/Makefile
create mode 100644 drivers/net/cxgb4/cxgb4_main.c
diff --git a/drivers/net/cxgb4/Makefile b/drivers/net/cxgb4/Makefile
new file mode 100644
index 0000000..4986674
--- /dev/null
+++ b/drivers/net/cxgb4/Makefile
@@ -0,0 +1,7 @@
+#
+# Chelsio T4 driver
+#
+
+obj-$(CONFIG_CHELSIO_T4) += cxgb4.o
+
+cxgb4-objs := cxgb4_main.o l2t.o t4_hw.o sge.o
diff --git a/drivers/net/cxgb4/cxgb4_main.c b/drivers/net/cxgb4/cxgb4_main.c
new file mode 100644
index 0000000..b2625af
--- /dev/null
+++ b/drivers/net/cxgb4/cxgb4_main.c
@@ -0,0 +1,4234 @@
+/*
+ * This file is part of the Chelsio T4 Ethernet driver for Linux.
+ *
+ * Copyright (c) 2003-2010 Chelsio Communications, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/bitmap.h>
+#include <linux/crc32.h>
+#include <linux/ctype.h>
+#include <linux/debugfs.h>
+#include <linux/etherdevice.h>
+#include <linux/firmware.h>
+#include <linux/if_vlan.h>
+#include <linux/init.h>
+#include <linux/log2.h>
+#include <linux/mdio.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mutex.h>
+#include <linux/netdevice.h>
+#include <linux/pci.h>
+#include <linux/aer.h>
+#include <linux/proc_fs.h>
+#include <linux/rtnetlink.h>
+#include <linux/seq_file.h>
+#include <linux/sockios.h>
+#include <linux/vmalloc.h>
+#include <linux/workqueue.h>
+#include <net/neighbour.h>
+#include <net/netevent.h>
+#include <asm/uaccess.h>
+
+#include "cxgb4.h"
+#include "t4_regs.h"
+#include "t4_msg.h"
+#include "t4fw_api.h"
+#include "l2t.h"
+
+#define DRV_VERSION "1.0.0-ko"
+#define DRV_DESC "Chelsio T4 Network Driver"
+
+/*
+ * Max interrupt hold-off timer value in us. Queues fall back to this value
+ * under extreme memory pressure so it's largish to give the system time to
+ * recover.
+ */
+#define MAX_SGE_TIMERVAL 200U
+
+enum {
+ MEMWIN0_APERTURE = 65536,
+ MEMWIN0_BASE = 0x30000,
+ MEMWIN1_APERTURE = 32768,
+ MEMWIN1_BASE = 0x28000,
+ MEMWIN2_APERTURE = 2048,
+ MEMWIN2_BASE = 0x1b800,
+};
+
+enum {
+ MAX_TXQ_ENTRIES = 16384,
+ MAX_CTRL_TXQ_ENTRIES = 1024,
+ MAX_RSPQ_ENTRIES = 16384,
+ MAX_RX_BUFFERS = 16384,
+ MIN_TXQ_ENTRIES = 32,
+ MIN_CTRL_TXQ_ENTRIES = 32,
+ MIN_RSPQ_ENTRIES = 128,
+ MIN_FL_ENTRIES = 16
+};
+
+#define DFLT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
+ NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP |\
+ NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
+
+#define CH_DEVICE(devid) { PCI_VDEVICE(CHELSIO, devid), 0 }
+
+static DEFINE_PCI_DEVICE_TABLE(cxgb4_pci_tbl) = {
+ CH_DEVICE(0xa000), /* PE10K */
+ { 0, }
+};
+
+#define FW_FNAME "cxgb4/t4fw.bin"
+
+MODULE_DESCRIPTION(DRV_DESC);
+MODULE_AUTHOR("Chelsio Communications");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DEVICE_TABLE(pci, cxgb4_pci_tbl);
+MODULE_FIRMWARE(FW_FNAME);
+
+static int dflt_msg_enable = DFLT_MSG_ENABLE;
+
+module_param(dflt_msg_enable, int, 0644);
+MODULE_PARM_DESC(dflt_msg_enable, "Chelsio T4 default message enable bitmap");
+
+/*
+ * The driver uses the best interrupt scheme available on a platform in the
+ * order MSI-X, MSI, legacy INTx interrupts. This parameter determines which
+ * of these schemes the driver may consider as follows:
+ *
+ * msi = 2: choose from among all three options
+ * msi = 1: only consider MSI and INTx interrupts
+ * msi = 0: force INTx interrupts
+ */
+static int msi = 2;
+
+module_param(msi, int, 0644);
+MODULE_PARM_DESC(msi, "whether to use INTx (0), MSI (1) or MSI-X (2)");
+
+/*
+ * Queue interrupt hold-off timer values. Queues default to the first of these
+ * upon creation.
+ */
+static unsigned int intr_holdoff[SGE_NTIMERS - 1] = { 5, 10, 20, 50, 100 };
+
+module_param_array(intr_holdoff, uint, NULL, 0644);
+MODULE_PARM_DESC(intr_holdoff, "values for queue interrupt hold-off timers "
+ "0..4 in microseconds");
+
+static unsigned int intr_cnt[SGE_NCOUNTERS - 1] = { 4, 8, 16 };
+
+module_param_array(intr_cnt, uint, NULL, 0644);
+MODULE_PARM_DESC(intr_cnt,
+ "thresholds 1..3 for queue interrupt packet counters");
+
+static int vf_acls;
+
+#ifdef CONFIG_PCI_IOV
+module_param(vf_acls, bool, 0644);
+MODULE_PARM_DESC(vf_acls, "if set enable virtualization L2 ACL enforcement");
+
+static unsigned int num_vf[4];
+
+module_param_array(num_vf, uint, NULL, 0644);
+MODULE_PARM_DESC(num_vf, "number of VFs for each of PFs 0-3");
+#endif
+
+static struct dentry *cxgb4_debugfs_root;
+static struct proc_dir_entry *cxgb4_proc_root;
+
+static LIST_HEAD(adapter_list);
+static DEFINE_MUTEX(uld_mutex);
+static struct cxgb4_uld_info ulds[CXGB4_ULD_MAX];
+static const char *uld_str[] = { "RDMA", "iSCSI" };
+
+static void link_report(struct net_device *dev)
+{
+ if (!netif_carrier_ok(dev))
+ netdev_info(dev, "link down\n");
+ else {
+ static const char *fc[] = { "no", "Rx", "Tx", "Tx/Rx" };
+
+ const char *s = "10Mbps";
+ const struct port_info *p = netdev_priv(dev);
+
+ switch (p->link_cfg.speed) {
+ case SPEED_10000:
+ s = "10Gbps";
+ break;
+ case SPEED_1000:
+ s = "1000Mbps";
+ break;
+ case SPEED_100:
+ s = "100Mbps";
+ break;
+ }
+
+ netdev_info(dev, "link up, %s, full-duplex, %s PAUSE\n", s,
+ fc[p->link_cfg.fc]);
+ }
+}
+
+void t4_os_link_changed(struct adapter *adapter, int port_id, int link_stat)
+{
+ struct net_device *dev = adapter->port[port_id];
+
+ /* Skip changes from disabled ports. */
+ if (netif_running(dev) && link_stat != netif_carrier_ok(dev)) {
+ if (link_stat)
+ netif_carrier_on(dev);
+ else
+ netif_carrier_off(dev);
+
+ link_report(dev);
+ }
+}
+
+void t4_os_portmod_changed(const struct adapter *adap, int port_id)
+{
+ static const char *mod_str[] = {
+ NULL, "LR", "SR", "ER", "passive DA", "active DA"
+ };
+
+ const struct net_device *dev = adap->port[port_id];
+ const struct port_info *pi = netdev_priv(dev);
+
+ if (pi->mod_type == FW_PORT_MOD_TYPE_NONE)
+ netdev_info(dev, "port module unplugged\n");
+ else
+ netdev_info(dev, "%s module inserted\n", mod_str[pi->mod_type]);
+}
+
+/*
+ * Configure the exact and hash address filters to handle a port's multicast
+ * and secondary unicast MAC addresses.
+ */
+static int set_addr_filters(const struct net_device *dev, bool sleep)
+{
+ u64 mhash = 0;
+ u64 uhash = 0;
+ bool free = true;
+ u16 filt_idx[7];
+ const u8 *addr[7];
+ int ret, naddr = 0;
+ const struct dev_addr_list *d;
+ const struct netdev_hw_addr *ha;
+ int uc_cnt = netdev_uc_count(dev);
+ const struct port_info *pi = netdev_priv(dev);
+
+ /* first do the secondary unicast addresses */
+ netdev_for_each_uc_addr(ha, dev) {
+ addr[naddr++] = ha->addr;
+ if (--uc_cnt == 0 || naddr >= ARRAY_SIZE(addr)) {
+ ret = t4_alloc_mac_filt(pi->adapter, 0, pi->viid, free,
+ naddr, addr, filt_idx, &uhash, sleep);
+ if (ret < 0)
+ return ret;
+
+ free = false;
+ naddr = 0;
+ }
+ }
+
+ /* next set up the multicast addresses */
+ netdev_for_each_mc_addr(d, dev) {
+ addr[naddr++] = d->dmi_addr;
+ if (naddr >= ARRAY_SIZE(addr) || d->next == NULL) {
+ ret = t4_alloc_mac_filt(pi->adapter, 0, pi->viid, free,
+ naddr, addr, filt_idx, &mhash, sleep);
+ if (ret < 0)
+ return ret;
+
+ free = false;
+ naddr = 0;
+ }
+ }
+
+ return t4_set_addr_hash(pi->adapter, 0, pi->viid, uhash != 0,
+ uhash | mhash, sleep);
+}
+
+/*
+ * Set Rx properties of a port, such as promiscruity, address filters, and MTU.
+ * If @mtu is -1 it is left unchanged.
+ */
+static int set_rxmode(struct net_device *dev, int mtu, bool sleep_ok)
+{
+ int ret;
+ struct port_info *pi = netdev_priv(dev);
+
+ ret = set_addr_filters(dev, sleep_ok);
+ if (ret == 0)
+ ret = t4_set_rxmode(pi->adapter, 0, pi->viid, mtu,
+ (dev->flags & IFF_PROMISC) ? 1 : 0,
+ (dev->flags & IFF_ALLMULTI) ? 1 : 0, 1,
+ sleep_ok);
+ return ret;
+}
+
+/**
+ * link_start - enable a port
+ * @dev: the port to enable
+ *
+ * Performs the MAC and PHY actions needed to enable a port.
+ */
+static int link_start(struct net_device *dev)
+{
+ int ret;
+ struct port_info *pi = netdev_priv(dev);
+
+ /*
+ * We do not set address filters and promiscuity here, the stack does
+ * that step explicitly.
+ */
+ ret = t4_set_rxmode(pi->adapter, 0, pi->viid, dev->mtu, -1, -1, -1,
+ true);
+ if (ret == 0) {
+ ret = t4_change_mac(pi->adapter, 0, pi->viid,
+ pi->xact_addr_filt, dev->dev_addr, true);
+ if (ret >= 0) {
+ pi->xact_addr_filt = ret;
+ ret = 0;
+ }
+ }
+ if (ret == 0)
+ ret = t4_link_start(pi->adapter, 0, pi->tx_chan, &pi->link_cfg);
+ if (ret == 0)
+ ret = t4_enable_vi(pi->adapter, 0, pi->viid, true, true);
+ return ret;
+}
+
+/*
+ * Response queue handler for the FW event queue.
+ */
+static int fwevtq_handler(struct sge_rspq *q, const __be64 *rsp,
+ const struct pkt_gl *gl)
+{
+ u8 opcode = ((const struct rss_header *)rsp)->opcode;
+
+ rsp++; /* skip RSS header */
+ if (likely(opcode == CPL_SGE_EGR_UPDATE)) {
+ const struct cpl_sge_egr_update *p = (void *)rsp;
+ unsigned int qid = EGR_QID(ntohl(p->opcode_qid));
+ struct sge_txq *txq = q->adap->sge.egr_map[qid];
+
+ txq->restarts++;
+ if ((u8 *)txq < (u8 *)q->adap->sge.ethrxq) {
+ struct sge_eth_txq *eq;
+
+ eq = container_of(txq, struct sge_eth_txq, q);
+ netif_tx_wake_queue(eq->txq);
+ } else {
+ struct sge_ofld_txq *oq;
+
+ oq = container_of(txq, struct sge_ofld_txq, q);
+ tasklet_schedule(&oq->qresume_tsk);
+ }
+ } else if (opcode == CPL_FW6_MSG || opcode == CPL_FW4_MSG) {
+ const struct cpl_fw6_msg *p = (void *)rsp;
+
+ if (p->type == 0)
+ t4_handle_fw_rpl(q->adap, p->data);
+ } else if (opcode == CPL_L2T_WRITE_RPL) {
+ const struct cpl_l2t_write_rpl *p = (void *)rsp;
+
+ do_l2t_write_rpl(q->adap, p);
+ } else
+ dev_err(q->adap->pdev_dev,
+ "unexpected CPL %#x on FW event queue\n", opcode);
+ return 0;
+}
+
+/**
+ * uldrx_handler - response queue handler for ULD queues
+ * @q: the response queue that received the packet
+ * @rsp: the response queue descriptor holding the offload message
+ * @gl: the gather list of packet fragments
+ *
+ * Deliver an ingress offload packet to a ULD. All processing is done by
+ * the ULD, we just maintain statistics.
+ */
+static int uldrx_handler(struct sge_rspq *q, const __be64 *rsp,
+ const struct pkt_gl *gl)
+{
+ struct sge_ofld_rxq *rxq = container_of(q, struct sge_ofld_rxq, rspq);
+
+ if (ulds[q->uld].rx_handler(q->adap->uld_handle[q->uld], rsp, gl)) {
+ rxq->stats.nomem++;
+ return -1;
+ }
+ if (gl == NULL)
+ rxq->stats.imm++;
+ else if (gl == CXGB4_MSG_AN)
+ rxq->stats.an++;
+ else
+ rxq->stats.pkts++;
+ return 0;
+}
+
+static void disable_msi(struct adapter *adapter)
+{
+ if (adapter->flags & USING_MSIX) {
+ pci_disable_msix(adapter->pdev);
+ adapter->flags &= ~USING_MSIX;
+ } else if (adapter->flags & USING_MSI) {
+ pci_disable_msi(adapter->pdev);
+ adapter->flags &= ~USING_MSI;
+ }
+}
+
+/*
+ * Interrupt handler for non-data events used with MSI-X.
+ */
+static irqreturn_t t4_nondata_intr(int irq, void *cookie)
+{
+ struct adapter *adap = cookie;
+
+ u32 v = t4_read_reg(adap, MYPF_REG(PL_PF_INT_CAUSE));
+ if (v & PFSW) {
+ adap->swintr = 1;
+ t4_write_reg(adap, MYPF_REG(PL_PF_INT_CAUSE), v);
+ }
+ t4_slow_intr_handler(adap);
+ return IRQ_HANDLED;
+}
+
+/*
+ * Name the MSI-X interrupts.
+ */
+static void name_msix_vecs(struct adapter *adap)
+{
+ int i, j, msi_idx = 2, n = sizeof(adap->msix_info[0].desc) - 1;
+
+ /* non-data interrupts */
+ snprintf(adap->msix_info[0].desc, n, "%s", adap->name);
+ adap->msix_info[0].desc[n] = 0;
+
+ /* FW events */
+ snprintf(adap->msix_info[1].desc, n, "%s-FWeventq", adap->name);
+ adap->msix_info[1].desc[n] = 0;
+
+ /* Ethernet queues */
+ for_each_port(adap, j) {
+ struct net_device *d = adap->port[j];
+ const struct port_info *pi = netdev_priv(d);
+
+ for (i = 0; i < pi->nqsets; i++, msi_idx++) {
+ snprintf(adap->msix_info[msi_idx].desc, n, "%s-Rx%d",
+ d->name, i);
+ adap->msix_info[msi_idx].desc[n] = 0;
+ }
+ }
+
+ /* offload queues */
+ for_each_ofldrxq(&adap->sge, i) {
+ snprintf(adap->msix_info[msi_idx].desc, n, "%s-ofld%d",
+ adap->name, i);
+ adap->msix_info[msi_idx++].desc[n] = 0;
+ }
+ for_each_rdmarxq(&adap->sge, i) {
+ snprintf(adap->msix_info[msi_idx].desc, n, "%s-rdma%d",
+ adap->name, i);
+ adap->msix_info[msi_idx++].desc[n] = 0;
+ }
+}
+
+static int request_msix_queue_irqs(struct adapter *adap)
+{
+ struct sge *s = &adap->sge;
+ int err, ethqidx, ofldqidx = 0, rdmaqidx = 0, msi = 2;
+
+ err = request_irq(adap->msix_info[1].vec, t4_sge_intr_msix, 0,
+ adap->msix_info[1].desc, &s->fw_evtq);
+ if (err)
+ return err;
+
+ for_each_ethrxq(s, ethqidx) {
+ err = request_irq(adap->msix_info[msi].vec, t4_sge_intr_msix, 0,
+ adap->msix_info[msi].desc,
+ &s->ethrxq[ethqidx].rspq);
+ if (err)
+ goto unwind;
+ msi++;
+ }
+ for_each_ofldrxq(s, ofldqidx) {
+ err = request_irq(adap->msix_info[msi].vec, t4_sge_intr_msix, 0,
+ adap->msix_info[msi].desc,
+ &s->ofldrxq[ofldqidx].rspq);
+ if (err)
+ goto unwind;
+ msi++;
+ }
+ for_each_rdmarxq(s, rdmaqidx) {
+ err = request_irq(adap->msix_info[msi].vec, t4_sge_intr_msix, 0,
+ adap->msix_info[msi].desc,
+ &s->rdmarxq[rdmaqidx].rspq);
+ if (err)
+ goto unwind;
+ msi++;
+ }
+ return 0;
+
+unwind:
+ while (--rdmaqidx >= 0)
+ free_irq(adap->msix_info[--msi].vec,
+ &s->rdmarxq[rdmaqidx].rspq);
+ while (--ofldqidx >= 0)
+ free_irq(adap->msix_info[--msi].vec,
+ &s->ofldrxq[ofldqidx].rspq);
+ while (--ethqidx >= 0)
+ free_irq(adap->msix_info[--msi].vec, &s->ethrxq[ethqidx].rspq);
+ free_irq(adap->msix_info[1].vec, &s->fw_evtq);
+ return err;
+}
+
+static void free_msix_queue_irqs(struct adapter *adap)
+{
+ int i, msi = 2;
+ struct sge *s = &adap->sge;
+
+ free_irq(adap->msix_info[1].vec, &s->fw_evtq);
+ for_each_ethrxq(s, i)
+ free_irq(adap->msix_info[msi++].vec, &s->ethrxq[i].rspq);
+ for_each_ofldrxq(s, i)
+ free_irq(adap->msix_info[msi++].vec, &s->ofldrxq[i].rspq);
+ for_each_rdmarxq(s, i)
+ free_irq(adap->msix_info[msi++].vec, &s->rdmarxq[i].rspq);
+}
+
+/**
+ * setup_rss - configure RSS
+ * @adap: the adapter
+ *
+ * Sets up RSS to distribute packets to multiple receive queues. We
+ * configure the RSS CPU lookup table to distribute to the number of HW
+ * receive queues, and the response queue lookup table to narrow that
+ * down to the response queues actually configured for each port.
+ * We always configure the RSS mapping for all ports since the mapping
+ * table has plenty of entries.
+ */
+static int setup_rss(struct adapter *adap)
+{
+ int i, j, err;
+ u16 rss[MAX_ETH_QSETS];
+
+ for_each_port(adap, i) {
+ const struct port_info *pi = adap2pinfo(adap, i);
+ const struct sge_eth_rxq *q = &adap->sge.ethrxq[pi->first_qset];
+
+ for (j = 0; j < pi->nqsets; j++)
+ rss[j] = q[j].rspq.abs_id;
+
+ err = t4_config_rss_range(adap, 0, pi->viid, 0, pi->rss_size,
+ rss, pi->nqsets);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+/*
+ * Wait until all NAPI handlers are descheduled.
+ */
+static void quiesce_rx(struct adapter *adap)
+{
+ int i;
+ struct sge *s = &adap->sge;
+
+ for_each_ethrxq(s, i)
+ napi_disable(&s->ethrxq[i].rspq.napi);
+
+ for_each_ofldrxq(s, i)
+ napi_disable(&s->ofldrxq[i].rspq.napi);
+
+ for_each_rdmarxq(s, i)
+ napi_disable(&s->rdmarxq[i].rspq.napi);
+
+ napi_disable(&s->fw_evtq.napi);
+}
+
+static void qenable(struct sge_rspq *q)
+{
+ napi_enable(&q->napi);
+ /* 0-increment GTS to start the timer and enable interrupts */
+ t4_write_reg(q->adap, MYPF_REG(SGE_PF_GTS),
+ SEINTARM(q->intr_params) | INGRESSQID(q->cntxt_id));
+}
+
+/*
+ * Enable NAPI scheduling and interrupt generation for all Rx queues.
+ */
+static void enable_rx(struct adapter *adap)
+{
+ int i;
+ struct sge *s = &adap->sge;
+
+ for_each_ethrxq(s, i)
+ qenable(&s->ethrxq[i].rspq);
+
+ for_each_ofldrxq(s, i)
+ qenable(&s->ofldrxq[i].rspq);
+
+ for_each_rdmarxq(s, i)
+ qenable(&s->rdmarxq[i].rspq);
+
+ qenable(&s->fw_evtq);
+
+ /* the interrupt queue doesn't use NAPI */
+ if (!(adap->flags & USING_MSIX))
+ t4_write_reg(adap, MYPF_REG(SGE_PF_GTS),
+ SEINTARM(s->intrq.intr_params) |
+ INGRESSQID(s->intrq.cntxt_id));
+}
+
+/**
+ * setup_sge_queues - configure SGE Tx/Rx/response queues
+ * @adap: the adapter
+ *
+ * Determines how many sets of SGE queues to use and initializes them.
+ * We support multiple queue sets per port if we have MSI-X, otherwise
+ * just one queue set per port.
+ */
+static int setup_sge_queues(struct adapter *adap)
+{
+ int err, msi_idx, i, j;
+ struct sge *s = &adap->sge;
+
+ bitmap_zero(s->starving_fl, MAX_EGRQ);
+ bitmap_zero(s->txq_maperr, MAX_EGRQ);
+
+ if (adap->flags & USING_MSIX)
+ msi_idx = 1; /* vector 0 is for non-queue interrupts */
+ else {
+ err = t4_sge_alloc_rxq(adap, &s->intrq, false, adap->port[0], 0,
+ NULL, NULL);
+ if (err)
+ return err;
+ msi_idx = -((int)s->intrq.abs_id + 1);
+ }
+
+ err = t4_sge_alloc_rxq(adap, &s->fw_evtq, true, adap->port[0],
+ msi_idx, NULL, fwevtq_handler);
+ if (err) {
+freeout: t4_free_sge_resources(adap);
+ return err;
+ }
+
+ for_each_port(adap, i) {
+ struct net_device *dev = adap->port[i];
+ struct port_info *pi = netdev_priv(dev);
+ struct sge_eth_rxq *q = &s->ethrxq[pi->first_qset];
+ struct sge_eth_txq *t = &s->ethtxq[pi->first_qset];
+
+ for (j = 0; j < pi->nqsets; j++, q++) {
+ if (msi_idx > 0)
+ msi_idx++;
+ err = t4_sge_alloc_rxq(adap, &q->rspq, false, dev,
+ msi_idx, &q->fl,
+ t4_ethrx_handler);
+ if (err)
+ goto freeout;
+ q->rspq.idx = j;
+ memset(&q->stats, 0, sizeof(q->stats));
+ }
+ for (j = 0; j < pi->nqsets; j++, t++) {
+ err = t4_sge_alloc_eth_txq(adap, t, dev,
+ netdev_get_tx_queue(dev, j),
+ s->fw_evtq.cntxt_id);
+ if (err)
+ goto freeout;
+ }
+ }
+
+ j = s->ofldqsets / adap->params.nports; /* ofld queues per channel */
+ for_each_ofldrxq(s, i) {
+ struct sge_ofld_rxq *q = &s->ofldrxq[i];
+ struct net_device *dev = adap->port[i / j];
+
+ if (msi_idx > 0)
+ msi_idx++;
+ err = t4_sge_alloc_rxq(adap, &q->rspq, false, dev, msi_idx,
+ &q->fl, uldrx_handler);
+ if (err)
+ goto freeout;
+ memset(&q->stats, 0, sizeof(q->stats));
+ s->ofld_rxq[i] = q->rspq.abs_id;
+ err = t4_sge_alloc_ofld_txq(adap, &s->ofldtxq[i], dev,
+ s->fw_evtq.cntxt_id);
+ if (err)
+ goto freeout;
+ }
+
+ for_each_rdmarxq(s, i) {
+ struct sge_ofld_rxq *q = &s->rdmarxq[i];
+
+ if (msi_idx > 0)
+ msi_idx++;
+ err = t4_sge_alloc_rxq(adap, &q->rspq, false, adap->port[i],
+ msi_idx, &q->fl, uldrx_handler);
+ if (err)
+ goto freeout;
+ memset(&q->stats, 0, sizeof(q->stats));
+ s->rdma_rxq[i] = q->rspq.abs_id;
+ }
+
+ for_each_port(adap, i) {
+ /*
+ * Note that ->rdmarxq[i].rspq.cntxt_id below is 0 if we don't
+ * have RDMA queues, and that's the right value.
+ */
+ err = t4_sge_alloc_ctrl_txq(adap, &s->ctrlq[i], adap->port[i],
+ s->fw_evtq.cntxt_id,
+ s->rdmarxq[i].rspq.cntxt_id);
+ if (err)
+ goto freeout;
+ }
+
+ t4_write_reg(adap, MPS_TRC_RSS_CONTROL,
+ RSSCONTROL(netdev2pinfo(adap->port[0])->tx_chan) |
+ QUEUENUMBER(s->ethrxq[0].rspq.abs_id));
+ return 0;
+}
+
+/*
+ * Returns 0 if new FW was successfully loaded, a positive errno if a load was
+ * started but failed, and a negative errno if flash load couldn't start.
+ */
+static int upgrade_fw(struct adapter *adap)
+{
+ int ret;
+ u32 vers;
+ const struct fw_hdr *hdr;
+ const struct firmware *fw;
+ struct device *dev = adap->pdev_dev;
+
+ ret = request_firmware(&fw, FW_FNAME, dev);
+ if (ret < 0) {
+ dev_err(dev, "unable to load firmware image " FW_FNAME
+ ", error %d\n", ret);
+ return ret;
+ }
+
+ hdr = (const struct fw_hdr *)fw->data;
+ vers = ntohl(hdr->fw_ver);
+ if (FW_HDR_FW_VER_MAJOR_GET(vers) != FW_VERSION_MAJOR) {
+ ret = -EINVAL; /* wrong major version, won't do */
+ goto out;
+ }
+
+ /*
+ * If the flash FW is unusable or we found something newer, load it.
+ */
+ if (FW_HDR_FW_VER_MAJOR_GET(adap->params.fw_vers) != FW_VERSION_MAJOR ||
+ vers > adap->params.fw_vers) {
+ ret = -t4_load_fw(adap, fw->data, fw->size);
+ if (!ret)
+ dev_info(dev, "firmware upgraded to version %pI4 from "
+ FW_FNAME "\n", &hdr->fw_ver);
+ }
+out: release_firmware(fw);
+ return ret;
+}
+
+/*
+ * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
+ * The allocated memory is cleared.
+ */
+void *t4_alloc_mem(size_t size)
+{
+ void *p = kmalloc(size, GFP_KERNEL);
+
+ if (!p)
+ p = vmalloc(size);
+ if (p)
+ memset(p, 0, size);
+ return p;
+}
+
+/*
+ * Free memory allocated through alloc_mem().
+ */
+void t4_free_mem(void *addr)
+{
+ if (is_vmalloc_addr(addr))
+ vfree(addr);
+ else
+ kfree(addr);
+}
+
+static inline int is_offload(const struct adapter *adap)
+{
+ return adap->params.offload;
+}
+
+/*
+ * Implementation of ethtool operations.
+ */
+
+static u32 get_msglevel(struct net_device *dev)
+{
+ return netdev2adap(dev)->msg_enable;
+}
+
+static void set_msglevel(struct net_device *dev, u32 val)
+{
+ netdev2adap(dev)->msg_enable = val;
+}
+
+static char stats_strings[][ETH_GSTRING_LEN] = {
+ "TxOctetsOK ",
+ "TxFramesOK ",
+ "TxBroadcastFrames ",
+ "TxMulticastFrames ",
+ "TxUnicastFrames ",
+ "TxErrorFrames ",
+
+ "TxFrames64 ",
+ "TxFrames65To127 ",
+ "TxFrames128To255 ",
+ "TxFrames256To511 ",
+ "TxFrames512To1023 ",
+ "TxFrames1024To1518 ",
+ "TxFrames1519ToMax ",
+
+ "TxFramesDropped ",
+ "TxPauseFrames ",
+ "TxPPP0Frames ",
+ "TxPPP1Frames ",
+ "TxPPP2Frames ",
+ "TxPPP3Frames ",
+ "TxPPP4Frames ",
+ "TxPPP5Frames ",
+ "TxPPP6Frames ",
+ "TxPPP7Frames ",
+
+ "RxOctetsOK ",
+ "RxFramesOK ",
+ "RxBroadcastFrames ",
+ "RxMulticastFrames ",
+ "RxUnicastFrames ",
+
+ "RxFramesTooLong ",
+ "RxJabberErrors ",
+ "RxFCSErrors ",
+ "RxLengthErrors ",
+ "RxSymbolErrors ",
+ "RxRuntFrames ",
+
+ "RxFrames64 ",
+ "RxFrames65To127 ",
+ "RxFrames128To255 ",
+ "RxFrames256To511 ",
+ "RxFrames512To1023 ",
+ "RxFrames1024To1518 ",
+ "RxFrames1519ToMax ",
+
+ "RxPauseFrames ",
+ "RxPPP0Frames ",
+ "RxPPP1Frames ",
+ "RxPPP2Frames ",
+ "RxPPP3Frames ",
+ "RxPPP4Frames ",
+ "RxPPP5Frames ",
+ "RxPPP6Frames ",
+ "RxPPP7Frames ",
+
+ "RxBG0FramesDropped ",
+ "RxBG1FramesDropped ",
+ "RxBG2FramesDropped ",
+ "RxBG3FramesDropped ",
+ "RxBG0FramesTrunc ",
+ "RxBG1FramesTrunc ",
+ "RxBG2FramesTrunc ",
+ "RxBG3FramesTrunc ",
+
+ "TSO ",
+ "TxCsumOffload ",
+ "RxCsumGood ",
+ "VLANextractions ",
+ "VLANinsertions ",
+};
+
+static int get_sset_count(struct net_device *dev, int sset)
+{
+ switch (sset) {
+ case ETH_SS_STATS:
+ return ARRAY_SIZE(stats_strings);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+#define T4_REGMAP_SIZE (160 * 1024)
+
+static int get_regs_len(struct net_device *dev)
+{
+ return T4_REGMAP_SIZE;
+}
+
+static int get_eeprom_len(struct net_device *dev)
+{
+ return EEPROMSIZE;
+}
+
+static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ struct adapter *adapter = netdev2adap(dev);
+
+ strcpy(info->driver, KBUILD_MODNAME);
+ strcpy(info->version, DRV_VERSION);
+ strcpy(info->bus_info, pci_name(adapter->pdev));
+
+ if (!adapter->params.fw_vers)
+ strcpy(info->fw_version, "N/A");
+ else
+ snprintf(info->fw_version, sizeof(info->fw_version),
+ "%u.%u.%u.%u, TP %u.%u.%u.%u",
+ FW_HDR_FW_VER_MAJOR_GET(adapter->params.fw_vers),
+ FW_HDR_FW_VER_MINOR_GET(adapter->params.fw_vers),
+ FW_HDR_FW_VER_MICRO_GET(adapter->params.fw_vers),
+ FW_HDR_FW_VER_BUILD_GET(adapter->params.fw_vers),
+ FW_HDR_FW_VER_MAJOR_GET(adapter->params.tp_vers),
+ FW_HDR_FW_VER_MINOR_GET(adapter->params.tp_vers),
+ FW_HDR_FW_VER_MICRO_GET(adapter->params.tp_vers),
+ FW_HDR_FW_VER_BUILD_GET(adapter->params.tp_vers));
+}
+
+static void get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+ if (stringset == ETH_SS_STATS)
+ memcpy(data, stats_strings, sizeof(stats_strings));
+}
+
+/*
+ * port stats maintained per queue of the port. They should be in the same
+ * order as in stats_strings above.
+ */
+struct queue_port_stats {
+ u64 tso;
+ u64 tx_csum;
+ u64 rx_csum;
+ u64 vlan_ex;
+ u64 vlan_ins;
+};
+
+static void collect_sge_port_stats(const struct adapter *adap,
+ const struct port_info *p, struct queue_port_stats *s)
+{
+ int i;
+ const struct sge_eth_txq *tx = &adap->sge.ethtxq[p->first_qset];
+ const struct sge_eth_rxq *rx = &adap->sge.ethrxq[p->first_qset];
+
+ memset(s, 0, sizeof(*s));
+ for (i = 0; i < p->nqsets; i++, rx++, tx++) {
+ s->tso += tx->tso;
+ s->tx_csum += tx->tx_cso;
+ s->rx_csum += rx->stats.rx_cso;
+ s->vlan_ex += rx->stats.vlan_ex;
+ s->vlan_ins += tx->vlan_ins;
+ }
+}
+
+static void get_stats(struct net_device *dev, struct ethtool_stats *stats,
+ u64 *data)
+{
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adapter = pi->adapter;
+
+ t4_get_port_stats(adapter, pi->tx_chan, (struct port_stats *)data);
+
+ data += sizeof(struct port_stats) / sizeof(u64);
+ collect_sge_port_stats(adapter, pi, (struct queue_port_stats *)data);
+}
+
+/*
+ * Return a version number to identify the type of adapter. The scheme is:
+ * - bits 0..9: chip version
+ * - bits 10..15: chip revision
+ */
+static inline unsigned int mk_adap_vers(const struct adapter *ap)
+{
+ return 4 | (ap->params.rev << 10);
+}
+
+static void reg_block_dump(struct adapter *ap, void *buf, unsigned int start,
+ unsigned int end)
+{
+ u32 *p = buf + start;
+
+ for ( ; start <= end; start += sizeof(u32))
+ *p++ = t4_read_reg(ap, start);
+}
+
+static void get_regs(struct net_device *dev, struct ethtool_regs *regs,
+ void *buf)
+{
+ static const unsigned int reg_ranges[] = {
+ 0x1008, 0x1108,
+ 0x1180, 0x11b4,
+ 0x11fc, 0x123c,
+ 0x1300, 0x173c,
+ 0x1800, 0x18fc,
+ 0x3000, 0x30d8,
+ 0x30e0, 0x5924,
+ 0x5960, 0x59d4,
+ 0x5a00, 0x5af8,
+ 0x6000, 0x6098,
+ 0x6100, 0x6150,
+ 0x6200, 0x6208,
+ 0x6240, 0x6248,
+ 0x6280, 0x6338,
+ 0x6370, 0x638c,
+ 0x6400, 0x643c,
+ 0x6500, 0x6524,
+ 0x6a00, 0x6a38,
+ 0x6a60, 0x6a78,
+ 0x6b00, 0x6b84,
+ 0x6bf0, 0x6c84,
+ 0x6cf0, 0x6d84,
+ 0x6df0, 0x6e84,
+ 0x6ef0, 0x6f84,
+ 0x6ff0, 0x7084,
+ 0x70f0, 0x7184,
+ 0x71f0, 0x7284,
+ 0x72f0, 0x7384,
+ 0x73f0, 0x7450,
+ 0x7500, 0x7530,
+ 0x7600, 0x761c,
+ 0x7680, 0x76cc,
+ 0x7700, 0x7798,
+ 0x77c0, 0x77fc,
+ 0x7900, 0x79fc,
+ 0x7b00, 0x7c38,
+ 0x7d00, 0x7efc,
+ 0x8dc0, 0x8e1c,
+ 0x8e30, 0x8e78,
+ 0x8ea0, 0x8f6c,
+ 0x8fc0, 0x9074,
+ 0x90fc, 0x90fc,
+ 0x9400, 0x9458,
+ 0x9600, 0x96bc,
+ 0x9800, 0x9808,
+ 0x9820, 0x983c,
+ 0x9850, 0x9864,
+ 0x9c00, 0x9c6c,
+ 0x9c80, 0x9cec,
+ 0x9d00, 0x9d6c,
+ 0x9d80, 0x9dec,
+ 0x9e00, 0x9e6c,
+ 0x9e80, 0x9eec,
+ 0x9f00, 0x9f6c,
+ 0x9f80, 0x9fec,
+ 0xd004, 0xd03c,
+ 0xdfc0, 0xdfe0,
+ 0xe000, 0xea7c,
+ 0xf000, 0x11190,
+ 0x19040, 0x19124,
+ 0x19150, 0x191b0,
+ 0x191d0, 0x191e8,
+ 0x19238, 0x1924c,
+ 0x193f8, 0x19474,
+ 0x19490, 0x194f8,
+ 0x19800, 0x19f30,
+ 0x1a000, 0x1a06c,
+ 0x1a0b0, 0x1a120,
+ 0x1a128, 0x1a138,
+ 0x1a190, 0x1a1c4,
+ 0x1a1fc, 0x1a1fc,
+ 0x1e040, 0x1e04c,
+ 0x1e240, 0x1e28c,
+ 0x1e2c0, 0x1e2c0,
+ 0x1e2e0, 0x1e2e0,
+ 0x1e300, 0x1e384,
+ 0x1e3c0, 0x1e3c8,
+ 0x1e440, 0x1e44c,
+ 0x1e640, 0x1e68c,
+ 0x1e6c0, 0x1e6c0,
+ 0x1e6e0, 0x1e6e0,
+ 0x1e700, 0x1e784,
+ 0x1e7c0, 0x1e7c8,
+ 0x1e840, 0x1e84c,
+ 0x1ea40, 0x1ea8c,
+ 0x1eac0, 0x1eac0,
+ 0x1eae0, 0x1eae0,
+ 0x1eb00, 0x1eb84,
+ 0x1ebc0, 0x1ebc8,
+ 0x1ec40, 0x1ec4c,
+ 0x1ee40, 0x1ee8c,
+ 0x1eec0, 0x1eec0,
+ 0x1eee0, 0x1eee0,
+ 0x1ef00, 0x1ef84,
+ 0x1efc0, 0x1efc8,
+ 0x1f040, 0x1f04c,
+ 0x1f240, 0x1f28c,
+ 0x1f2c0, 0x1f2c0,
+ 0x1f2e0, 0x1f2e0,
+ 0x1f300, 0x1f384,
+ 0x1f3c0, 0x1f3c8,
+ 0x1f440, 0x1f44c,
+ 0x1f640, 0x1f68c,
+ 0x1f6c0, 0x1f6c0,
+ 0x1f6e0, 0x1f6e0,
+ 0x1f700, 0x1f784,
+ 0x1f7c0, 0x1f7c8,
+ 0x1f840, 0x1f84c,
+ 0x1fa40, 0x1fa8c,
+ 0x1fac0, 0x1fac0,
+ 0x1fae0, 0x1fae0,
+ 0x1fb00, 0x1fb84,
+ 0x1fbc0, 0x1fbc8,
+ 0x1fc40, 0x1fc4c,
+ 0x1fe40, 0x1fe8c,
+ 0x1fec0, 0x1fec0,
+ 0x1fee0, 0x1fee0,
+ 0x1ff00, 0x1ff84,
+ 0x1ffc0, 0x1ffc8,
+ 0x20000, 0x2002c,
+ 0x20100, 0x2013c,
+ 0x20190, 0x201c8,
+ 0x20200, 0x20318,
+ 0x20400, 0x20528,
+ 0x20540, 0x20614,
+ 0x21000, 0x21040,
+ 0x2104c, 0x21060,
+ 0x210c0, 0x210ec,
+ 0x21200, 0x21268,
+ 0x21270, 0x21284,
+ 0x212fc, 0x21388,
+ 0x21400, 0x21404,
+ 0x21500, 0x21518,
+ 0x2152c, 0x2153c,
+ 0x21550, 0x21554,
+ 0x21600, 0x21600,
+ 0x21608, 0x21628,
+ 0x21630, 0x2163c,
+ 0x21700, 0x2171c,
+ 0x21780, 0x2178c,
+ 0x21800, 0x21c38,
+ 0x21c80, 0x21d7c,
+ 0x21e00, 0x21e04,
+ 0x22000, 0x2202c,
+ 0x22100, 0x2213c,
+ 0x22190, 0x221c8,
+ 0x22200, 0x22318,
+ 0x22400, 0x22528,
+ 0x22540, 0x22614,
+ 0x23000, 0x23040,
+ 0x2304c, 0x23060,
+ 0x230c0, 0x230ec,
+ 0x23200, 0x23268,
+ 0x23270, 0x23284,
+ 0x232fc, 0x23388,
+ 0x23400, 0x23404,
+ 0x23500, 0x23518,
+ 0x2352c, 0x2353c,
+ 0x23550, 0x23554,
+ 0x23600, 0x23600,
+ 0x23608, 0x23628,
+ 0x23630, 0x2363c,
+ 0x23700, 0x2371c,
+ 0x23780, 0x2378c,
+ 0x23800, 0x23c38,
+ 0x23c80, 0x23d7c,
+ 0x23e00, 0x23e04,
+ 0x24000, 0x2402c,
+ 0x24100, 0x2413c,
+ 0x24190, 0x241c8,
+ 0x24200, 0x24318,
+ 0x24400, 0x24528,
+ 0x24540, 0x24614,
+ 0x25000, 0x25040,
+ 0x2504c, 0x25060,
+ 0x250c0, 0x250ec,
+ 0x25200, 0x25268,
+ 0x25270, 0x25284,
+ 0x252fc, 0x25388,
+ 0x25400, 0x25404,
+ 0x25500, 0x25518,
+ 0x2552c, 0x2553c,
+ 0x25550, 0x25554,
+ 0x25600, 0x25600,
+ 0x25608, 0x25628,
+ 0x25630, 0x2563c,
+ 0x25700, 0x2571c,
+ 0x25780, 0x2578c,
+ 0x25800, 0x25c38,
+ 0x25c80, 0x25d7c,
+ 0x25e00, 0x25e04,
+ 0x26000, 0x2602c,
+ 0x26100, 0x2613c,
+ 0x26190, 0x261c8,
+ 0x26200, 0x26318,
+ 0x26400, 0x26528,
+ 0x26540, 0x26614,
+ 0x27000, 0x27040,
+ 0x2704c, 0x27060,
+ 0x270c0, 0x270ec,
+ 0x27200, 0x27268,
+ 0x27270, 0x27284,
+ 0x272fc, 0x27388,
+ 0x27400, 0x27404,
+ 0x27500, 0x27518,
+ 0x2752c, 0x2753c,
+ 0x27550, 0x27554,
+ 0x27600, 0x27600,
+ 0x27608, 0x27628,
+ 0x27630, 0x2763c,
+ 0x27700, 0x2771c,
+ 0x27780, 0x2778c,
+ 0x27800, 0x27c38,
+ 0x27c80, 0x27d7c,
+ 0x27e00, 0x27e04
+ };
+
+ int i;
+ struct adapter *ap = netdev2adap(dev);
+
+ regs->version = mk_adap_vers(ap);
+
+ memset(buf, 0, T4_REGMAP_SIZE);
+ for (i = 0; i < ARRAY_SIZE(reg_ranges); i += 2)
+ reg_block_dump(ap, buf, reg_ranges[i], reg_ranges[i + 1]);
+}
+
+static int restart_autoneg(struct net_device *dev)
+{
+ struct port_info *p = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return -EAGAIN;
+ if (p->link_cfg.autoneg != AUTONEG_ENABLE)
+ return -EINVAL;
+ t4_restart_aneg(p->adapter, 0, p->tx_chan);
+ return 0;
+}
+
+static int identify_port(struct net_device *dev, u32 data)
+{
+ if (data == 0)
+ data = 2; /* default to 2 seconds */
+
+ return t4_identify_port(netdev2adap(dev), 0, netdev2pinfo(dev)->viid,
+ data * 5);
+}
+
+static unsigned int from_fw_linkcaps(unsigned int type, unsigned int caps)
+{
+ unsigned int v = 0;
+
+ if (type == FW_PORT_TYPE_BT_SGMII || type == FW_PORT_TYPE_BT_XAUI) {
+ v |= SUPPORTED_TP;
+ if (caps & FW_PORT_CAP_SPEED_100M)
+ v |= SUPPORTED_100baseT_Full;
+ if (caps & FW_PORT_CAP_SPEED_1G)
+ v |= SUPPORTED_1000baseT_Full;
+ if (caps & FW_PORT_CAP_SPEED_10G)
+ v |= SUPPORTED_10000baseT_Full;
+ } else if (type == FW_PORT_TYPE_KX4 || type == FW_PORT_TYPE_KX) {
+ v |= SUPPORTED_Backplane;
+ if (caps & FW_PORT_CAP_SPEED_1G)
+ v |= SUPPORTED_1000baseKX_Full;
+ if (caps & FW_PORT_CAP_SPEED_10G)
+ v |= SUPPORTED_10000baseKX4_Full;
+ } else if (type == FW_PORT_TYPE_KR)
+ v |= SUPPORTED_Backplane | SUPPORTED_10000baseKR_Full;
+ else if (type == FW_PORT_TYPE_FIBER)
+ v |= SUPPORTED_FIBRE;
+
+ if (caps & FW_PORT_CAP_ANEG)
+ v |= SUPPORTED_Autoneg;
+ return v;
+}
+
+static unsigned int to_fw_linkcaps(unsigned int caps)
+{
+ unsigned int v = 0;
+
+ if (caps & ADVERTISED_100baseT_Full)
+ v |= FW_PORT_CAP_SPEED_100M;
+ if (caps & ADVERTISED_1000baseT_Full)
+ v |= FW_PORT_CAP_SPEED_1G;
+ if (caps & ADVERTISED_10000baseT_Full)
+ v |= FW_PORT_CAP_SPEED_10G;
+ return v;
+}
+
+static int get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ const struct port_info *p = netdev_priv(dev);
+
+ if (p->port_type == FW_PORT_TYPE_BT_SGMII ||
+ p->port_type == FW_PORT_TYPE_BT_XAUI)
+ cmd->port = PORT_TP;
+ else if (p->port_type == FW_PORT_TYPE_FIBER)
+ cmd->port = PORT_FIBRE;
+ else if (p->port_type == FW_PORT_TYPE_TWINAX)
+ cmd->port = PORT_DA;
+ else
+ cmd->port = PORT_OTHER;
+
+ if (p->mdio_addr >= 0) {
+ cmd->phy_address = p->mdio_addr;
+ cmd->transceiver = XCVR_EXTERNAL;
+ cmd->mdio_support = p->port_type == FW_PORT_TYPE_BT_SGMII ?
+ MDIO_SUPPORTS_C22 : MDIO_SUPPORTS_C45;
+ } else {
+ cmd->phy_address = 0; /* not really, but no better option */
+ cmd->transceiver = XCVR_INTERNAL;
+ cmd->mdio_support = 0;
+ }
+
+ cmd->supported = from_fw_linkcaps(p->port_type, p->link_cfg.supported);
+ cmd->advertising = from_fw_linkcaps(p->port_type,
+ p->link_cfg.advertising);
+ cmd->speed = netif_carrier_ok(dev) ? p->link_cfg.speed : 0;
+ cmd->duplex = DUPLEX_FULL;
+ cmd->autoneg = p->link_cfg.autoneg;
+ cmd->maxtxpkt = 0;
+ cmd->maxrxpkt = 0;
+ return 0;
+}
+
+static unsigned int speed_to_caps(int speed)
+{
+ if (speed == SPEED_100)
+ return FW_PORT_CAP_SPEED_100M;
+ if (speed == SPEED_1000)
+ return FW_PORT_CAP_SPEED_1G;
+ if (speed == SPEED_10000)
+ return FW_PORT_CAP_SPEED_10G;
+ return 0;
+}
+
+static int set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ unsigned int cap;
+ struct port_info *p = netdev_priv(dev);
+ struct link_config *lc = &p->link_cfg;
+
+ if (cmd->duplex != DUPLEX_FULL) /* only full-duplex supported */
+ return -EINVAL;
+
+ if (!(lc->supported & FW_PORT_CAP_ANEG)) {
+ /*
+ * PHY offers a single speed. See if that's what's
+ * being requested.
+ */
+ if (cmd->autoneg == AUTONEG_DISABLE &&
+ (lc->supported & speed_to_caps(cmd->speed)))
+ return 0;
+ return -EINVAL;
+ }
+
+ if (cmd->autoneg == AUTONEG_DISABLE) {
+ cap = speed_to_caps(cmd->speed);
+
+ if (!(lc->supported & cap) || cmd->speed == SPEED_1000 ||
+ cmd->speed == SPEED_10000)
+ return -EINVAL;
+ lc->requested_speed = cap;
+ lc->advertising = 0;
+ } else {
+ cap = to_fw_linkcaps(cmd->advertising);
+ if (!(lc->supported & cap))
+ return -EINVAL;
+ lc->requested_speed = 0;
+ lc->advertising = cap | FW_PORT_CAP_ANEG;
+ }
+ lc->autoneg = cmd->autoneg;
+
+ if (netif_running(dev))
+ return t4_link_start(p->adapter, 0, p->tx_chan, lc);
+ return 0;
+}
+
+static void get_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *epause)
+{
+ struct port_info *p = netdev_priv(dev);
+
+ epause->autoneg = (p->link_cfg.requested_fc & PAUSE_AUTONEG) != 0;
+ epause->rx_pause = (p->link_cfg.fc & PAUSE_RX) != 0;
+ epause->tx_pause = (p->link_cfg.fc & PAUSE_TX) != 0;
+}
+
+static int set_pauseparam(struct net_device *dev,
+ struct ethtool_pauseparam *epause)
+{
+ struct port_info *p = netdev_priv(dev);
+ struct link_config *lc = &p->link_cfg;
+
+ if (epause->autoneg == AUTONEG_DISABLE)
+ lc->requested_fc = 0;
+ else if (lc->supported & FW_PORT_CAP_ANEG)
+ lc->requested_fc = PAUSE_AUTONEG;
+ else
+ return -EINVAL;
+
+ if (epause->rx_pause)
+ lc->requested_fc |= PAUSE_RX;
+ if (epause->tx_pause)
+ lc->requested_fc |= PAUSE_TX;
+ if (netif_running(dev))
+ return t4_link_start(p->adapter, 0, p->tx_chan, lc);
+ return 0;
+}
+
+static u32 get_rx_csum(struct net_device *dev)
+{
+ struct port_info *p = netdev_priv(dev);
+
+ return p->rx_offload & RX_CSO;
+}
+
+static int set_rx_csum(struct net_device *dev, u32 data)
+{
+ struct port_info *p = netdev_priv(dev);
+
+ if (data)
+ p->rx_offload |= RX_CSO;
+ else
+ p->rx_offload &= ~RX_CSO;
+ return 0;
+}
+
+static void get_sge_param(struct net_device *dev, struct ethtool_ringparam *e)
+{
+ const struct port_info *pi = netdev_priv(dev);
+ const struct sge *s = &pi->adapter->sge;
+
+ e->rx_max_pending = MAX_RX_BUFFERS;
+ e->rx_mini_max_pending = MAX_RSPQ_ENTRIES;
+ e->rx_jumbo_max_pending = 0;
+ e->tx_max_pending = MAX_TXQ_ENTRIES;
+
+ e->rx_pending = s->ethrxq[pi->first_qset].fl.size - 8;
+ e->rx_mini_pending = s->ethrxq[pi->first_qset].rspq.size;
+ e->rx_jumbo_pending = 0;
+ e->tx_pending = s->ethtxq[pi->first_qset].q.size;
+}
+
+static int set_sge_param(struct net_device *dev, struct ethtool_ringparam *e)
+{
+ int i;
+ const struct port_info *pi = netdev_priv(dev);
+ struct adapter *adapter = pi->adapter;
+ struct sge *s = &adapter->sge;
+
+ if (e->rx_pending > MAX_RX_BUFFERS || e->rx_jumbo_pending ||
+ e->tx_pending > MAX_TXQ_ENTRIES ||
+ e->rx_mini_pending > MAX_RSPQ_ENTRIES ||
+ e->rx_mini_pending < MIN_RSPQ_ENTRIES ||
+ e->rx_pending < MIN_FL_ENTRIES || e->tx_pending < MIN_TXQ_ENTRIES)
+ return -EINVAL;
+
+ if (adapter->flags & FULL_INIT_DONE)
+ return -EBUSY;
+
+ for (i = 0; i < pi->nqsets; ++i) {
+ s->ethtxq[pi->first_qset + i].q.size = e->tx_pending;
+ s->ethrxq[pi->first_qset + i].fl.size = e->rx_pending + 8;
+ s->ethrxq[pi->first_qset + i].rspq.size = e->rx_mini_pending;
+ }
+ return 0;
+}
+
+static int closest_timer(const struct sge *s, int time)
+{
+ int i, delta, match = 0, min_delta = INT_MAX;
+
+ for (i = 0; i < ARRAY_SIZE(s->timer_val); i++) {
+ delta = time - s->timer_val[i];
+ if (delta < 0)
+ delta = -delta;
+ if (delta < min_delta) {
+ min_delta = delta;
+ match = i;
+ }
+ }
+ return match;
+}
+
+static int closest_thres(const struct sge *s, int thres)
+{
+ int i, delta, match = 0, min_delta = INT_MAX;
+
+ for (i = 0; i < ARRAY_SIZE(s->counter_val); i++) {
+ delta = thres - s->counter_val[i];
+ if (delta < 0)
+ delta = -delta;
+ if (delta < min_delta) {
+ min_delta = delta;
+ match = i;
+ }
+ }
+ return match;
+}
+
+/*
+ * Return a queue's interrupt hold-off time in us. 0 means no timer.
+ */
+static unsigned int qtimer_val(const struct adapter *adap,
+ const struct sge_rspq *q)
+{
+ unsigned int idx = q->intr_params >> 1;
+
+ return idx < SGE_NTIMERS ? adap->sge.timer_val[idx] : 0;
+}
+
+/**
+ * set_rxq_intr_params - set a queue's interrupt holdoff parameters
+ * @adap: the adapter
+ * @q: the Rx queue
+ * @us: the hold-off time in us, or 0 to disable timer
+ * @cnt: the hold-off packet count, or 0 to disable counter
+ *
+ * Sets an Rx queue's interrupt hold-off time and packet count. At least
+ * one of the two needs to be enabled for the queue to generate interrupts.
+ */
+static int set_rxq_intr_params(struct adapter *adap, struct sge_rspq *q,
+ unsigned int us, unsigned int cnt)
+{
+ if ((us | cnt) == 0)
+ cnt = 1;
+
+ if (cnt) {
+ int err;
+ u32 v, new_idx;
+
+ new_idx = closest_thres(&adap->sge, cnt);
+ if (q->desc && q->pktcnt_idx != new_idx) {
+ /* the queue has already been created, update it */
+ v = FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) |
+ FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_IQ_INTCNTTHRESH) |
+ FW_PARAMS_PARAM_YZ(q->cntxt_id);
+ err = t4_set_params(adap, 0, 1, &v, &new_idx);
+ if (err)
+ return err;
+ }
+ q->pktcnt_idx = new_idx;
+ }
+
+ us = us == 0 ? 6 : closest_timer(&adap->sge, us);
+ q->intr_params = QINTR_TIMER_IDX(us) | (cnt > 0 ? QINTR_CNT_EN : 0);
+ return 0;
+}
+
+static int set_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
+{
+ const struct port_info *pi = netdev_priv(dev);
+ struct adapter *adap = pi->adapter;
+
+ return set_rxq_intr_params(adap, &adap->sge.ethrxq[pi->first_qset].rspq,
+ c->rx_coalesce_usecs, c->rx_max_coalesced_frames);
+}
+
+static int get_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
+{
+ const struct port_info *pi = netdev_priv(dev);
+ const struct adapter *adap = pi->adapter;
+ const struct sge_rspq *rq = &adap->sge.ethrxq[pi->first_qset].rspq;
+
+ c->rx_coalesce_usecs = qtimer_val(adap, rq);
+ c->rx_max_coalesced_frames = (rq->intr_params & QINTR_CNT_EN) ?
+ adap->sge.counter_val[rq->pktcnt_idx] : 0;
+ return 0;
+}
+
+/*
+ * Translate a physical EEPROM address to virtual. The first 1K is accessed
+ * through virtual addresses starting at 31K, the rest is accessed through
+ * virtual addresses starting at 0. This mapping is correct only for PF0.
+ */
+static int eeprom_ptov(unsigned int phys_addr)
+{
+ if (phys_addr < 1024)
+ return phys_addr + (31 << 10);
+ if (phys_addr < EEPROMSIZE)
+ return phys_addr - 1024;
+ return -EINVAL;
+}
+
+/*
+ * The next two routines implement eeprom read/write from physical addresses.
+ * The physical->virtual translation is correct only for PF0.
+ */
+static int eeprom_rd_phys(struct adapter *adap, unsigned int phys_addr, u32 *v)
+{
+ int vaddr = eeprom_ptov(phys_addr);
+
+ if (vaddr >= 0)
+ vaddr = pci_read_vpd(adap->pdev, vaddr, sizeof(u32), v);
+ return vaddr < 0 ? vaddr : 0;
+}
+
+static int eeprom_wr_phys(struct adapter *adap, unsigned int phys_addr, u32 v)
+{
+ int vaddr = eeprom_ptov(phys_addr);
+
+ if (vaddr >= 0)
+ vaddr = pci_write_vpd(adap->pdev, vaddr, sizeof(u32), &v);
+ return vaddr < 0 ? vaddr : 0;
+}
+
+#define EEPROM_MAGIC 0x38E2F10C
+
+static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *e,
+ u8 *data)
+{
+ int i, err = 0;
+ struct adapter *adapter = netdev2adap(dev);
+
+ u8 *buf = kmalloc(EEPROMSIZE, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ e->magic = EEPROM_MAGIC;
+ for (i = e->offset & ~3; !err && i < e->offset + e->len; i += 4)
+ err = eeprom_rd_phys(adapter, i, (u32 *)&buf[i]);
+
+ if (!err)
+ memcpy(data, buf + e->offset, e->len);
+ kfree(buf);
+ return err;
+}
+
+static int set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
+ u8 *data)
+{
+ u8 *buf;
+ int err = 0;
+ u32 aligned_offset, aligned_len, *p;
+ struct adapter *adapter = netdev2adap(dev);
+
+ if (eeprom->magic != EEPROM_MAGIC)
+ return -EINVAL;
+
+ aligned_offset = eeprom->offset & ~3;
+ aligned_len = (eeprom->len + (eeprom->offset & 3) + 3) & ~3;
+
+ if (aligned_offset != eeprom->offset || aligned_len != eeprom->len) {
+ /*
+ * RMW possibly needed for first or last words.
+ */
+ buf = kmalloc(aligned_len, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ err = eeprom_rd_phys(adapter, aligned_offset, (u32 *)buf);
+ if (!err && aligned_len > 4)
+ err = eeprom_rd_phys(adapter,
+ aligned_offset + aligned_len - 4,
+ (u32 *)&buf[aligned_len - 4]);
+ if (err)
+ goto out;
+ memcpy(buf + (eeprom->offset & 3), data, eeprom->len);
+ } else
+ buf = data;
+
+ err = t4_seeprom_wp(adapter, false);
+ if (err)
+ goto out;
+
+ for (p = (u32 *)buf; !err && aligned_len; aligned_len -= 4, p++) {
+ err = eeprom_wr_phys(adapter, aligned_offset, *p);
+ aligned_offset += 4;
+ }
+
+ if (!err)
+ err = t4_seeprom_wp(adapter, true);
+out:
+ if (buf != data)
+ kfree(buf);
+ return err;
+}
+
+static int set_flash(struct net_device *netdev, struct ethtool_flash *ef)
+{
+ int ret;
+ const struct firmware *fw;
+ struct adapter *adap = netdev2adap(netdev);
+
+ ef->data[sizeof(ef->data) - 1] = '\0';
+ ret = request_firmware(&fw, ef->data, adap->pdev_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = t4_load_fw(adap, fw->data, fw->size);
+ release_firmware(fw);
+ if (!ret)
+ dev_info(adap->pdev_dev, "loaded firmware %s\n", ef->data);
+ return ret;
+}
+
+#define WOL_SUPPORTED (WAKE_BCAST | WAKE_MAGIC)
+#define BCAST_CRC 0xa0ccc1a6
+
+static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ wol->supported = WAKE_BCAST | WAKE_MAGIC;
+ wol->wolopts = netdev2adap(dev)->wol;
+ memset(&wol->sopass, 0, sizeof(wol->sopass));
+}
+
+static int set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ int err = 0;
+ struct port_info *pi = netdev_priv(dev);
+
+ if (wol->wolopts & ~WOL_SUPPORTED)
+ return -EINVAL;
+ t4_wol_magic_enable(pi->adapter, pi->tx_chan,
+ (wol->wolopts & WAKE_MAGIC) ? dev->dev_addr : NULL);
+ if (wol->wolopts & WAKE_BCAST) {
+ err = t4_wol_pat_enable(pi->adapter, pi->tx_chan, 0xfe, ~0ULL,
+ ~0ULL, 0, false);
+ if (!err)
+ err = t4_wol_pat_enable(pi->adapter, pi->tx_chan, 1,
+ ~6ULL, ~0ULL, BCAST_CRC, true);
+ } else
+ t4_wol_pat_enable(pi->adapter, pi->tx_chan, 0, 0, 0, 0, false);
+ return err;
+}
+
+static int set_tso(struct net_device *dev, u32 value)
+{
+ if (value)
+ dev->features |= NETIF_F_TSO | NETIF_F_TSO6;
+ else
+ dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
+ return 0;
+}
+
+static struct ethtool_ops cxgb_ethtool_ops = {
+ .get_settings = get_settings,
+ .set_settings = set_settings,
+ .get_drvinfo = get_drvinfo,
+ .get_msglevel = get_msglevel,
+ .set_msglevel = set_msglevel,
+ .get_ringparam = get_sge_param,
+ .set_ringparam = set_sge_param,
+ .get_coalesce = get_coalesce,
+ .set_coalesce = set_coalesce,
+ .get_eeprom_len = get_eeprom_len,
+ .get_eeprom = get_eeprom,
+ .set_eeprom = set_eeprom,
+ .get_pauseparam = get_pauseparam,
+ .set_pauseparam = set_pauseparam,
+ .get_rx_csum = get_rx_csum,
+ .set_rx_csum = set_rx_csum,
+ .set_tx_csum = ethtool_op_set_tx_ipv6_csum,
+ .set_sg = ethtool_op_set_sg,
+ .get_link = ethtool_op_get_link,
+ .get_strings = get_strings,
+ .phys_id = identify_port,
+ .nway_reset = restart_autoneg,
+ .get_sset_count = get_sset_count,
+ .get_ethtool_stats = get_stats,
+ .get_regs_len = get_regs_len,
+ .get_regs = get_regs,
+ .get_wol = get_wol,
+ .set_wol = set_wol,
+ .set_tso = set_tso,
+ .flash_device = set_flash,
+};
+
+/*
+ * Read a vector of numbers from a user space buffer. Each number must be
+ * between min and max inclusive and in the given base.
+ */
+static int rd_usr_int_vec(const char __user *buf, size_t usr_len, int vec_len,
+ unsigned long *vals, unsigned long min,
+ unsigned long max, int base)
+{
+ size_t l;
+ unsigned long v;
+ char c, word[68], *end;
+
+ while (usr_len) {
+ /* skip whitespace to beginning of next word */
+ while (usr_len) {
+ if (get_user(c, buf))
+ return -EFAULT;
+ if (!isspace(c))
+ break;
+ usr_len--;
+ buf++;
+ }
+
+ if (!usr_len)
+ break;
+ if (!vec_len)
+ return -EINVAL; /* too many numbers */
+
+ /* get next word (possibly going beyond its end) */
+ l = min(usr_len, sizeof(word) - 1);
+ if (copy_from_user(word, buf, l))
+ return -EFAULT;
+ word[l] = '\0';
+
+ v = simple_strtoul(word, &end, base);
+ l = end - word;
+ if (!l)
+ return -EINVAL; /* catch embedded '\0's */
+ if (*end && !isspace(*end))
+ return -EINVAL;
+ /*
+ * Complain if we encountered a too long sequence of digits.
+ * The most we can consume in one iteration is for a 64-bit
+ * number in binary. Too bad simple_strtoul doesn't catch
+ * overflows.
+ */
+ if (l > 64)
+ return -EINVAL;
+ if (v < min || v > max)
+ return -ERANGE;
+ *vals++ = v;
+ vec_len--;
+ usr_len -= l;
+ buf += l;
+ }
+ if (vec_len)
+ return -EINVAL; /* not enough numbers */
+ return 0;
+}
+
+static void seq_noop_stop(struct seq_file *seq, void *v)
+{
+}
+
+/*
+ * generic seq_file support for showing a table of size rows x width.
+ */
+struct seq_tab {
+ int (*show)(struct seq_file *seq, void *v, int idx);
+ unsigned int rows; /* # of entries */
+ unsigned char width; /* size in bytes of each entry */
+ unsigned char skip_first; /* whether the first line is a header */
+ char data[0]; /* the table data */
+};
+
+static void *seq_tab_get_idx(struct seq_tab *tb, loff_t pos)
+{
+ pos -= tb->skip_first;
+ return pos >= tb->rows ? NULL : &tb->data[pos * tb->width];
+}
+
+static void *seq_tab_start(struct seq_file *seq, loff_t *pos)
+{
+ struct seq_tab *tb = seq->private;
+
+ if (tb->skip_first && *pos == 0)
+ return SEQ_START_TOKEN;
+
+ return seq_tab_get_idx(tb, *pos);
+}
+
+static void *seq_tab_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ v = seq_tab_get_idx(seq->private, *pos + 1);
+ if (v)
+ ++*pos;
+ return v;
+}
+
+static int seq_tab_show(struct seq_file *seq, void *v)
+{
+ const struct seq_tab *tb = seq->private;
+
+ /*
+ * index is bogus when v isn't within data, eg when it's
+ * SEQ_START_TOKEN, but that's OK
+ */
+ return tb->show(seq, v, ((char *)v - tb->data) / tb->width);
+}
+
+static const struct seq_operations seq_tab_ops = {
+ .start = seq_tab_start,
+ .next = seq_tab_next,
+ .stop = seq_noop_stop,
+ .show = seq_tab_show
+};
+
+static struct seq_tab *seq_open_tab(struct file *f, unsigned int rows,
+ unsigned int width, unsigned int have_header,
+ int (*show)(struct seq_file *seq, void *v, int i))
+{
+ struct seq_tab *p;
+
+ p = __seq_open_private(f, &seq_tab_ops, sizeof(*p) + rows * width);
+ if (p) {
+ p->show = show;
+ p->rows = rows;
+ p->width = width;
+ p->skip_first = have_header != 0;
+ }
+ return p;
+}
+
+/*
+ * debugfs support
+ */
+
+static int mem_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static ssize_t mem_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ loff_t pos = *ppos;
+ loff_t avail = file->f_path.dentry->d_inode->i_size;
+ unsigned int mem = (uintptr_t)file->private_data & 3;
+ struct adapter *adap = file->private_data - mem;
+
+ if (pos < 0)
+ return -EINVAL;
+ if (pos >= avail)
+ return 0;
+ if (count > avail - pos)
+ count = avail - pos;
+
+ while (count) {
+ size_t len;
+ int ret, ofst;
+ __be32 data[16];
+
+ if (mem == MEM_MC)
+ ret = t4_mc_read(adap, pos, data, NULL);
+ else
+ ret = t4_edc_read(adap, mem, pos, data, NULL);
+ if (ret)
+ return ret;
+
+ ofst = pos % sizeof(data);
+ len = min(count, sizeof(data) - ofst);
+ if (copy_to_user(buf, (u8 *)data + ofst, len))
+ return -EFAULT;
+
+ buf += len;
+ pos += len;
+ count -= len;
+ }
+ count = pos - *ppos;
+ *ppos = pos;
+ return count;
+}
+
+static const struct file_operations mem_debugfs_fops = {
+ .owner = THIS_MODULE,
+ .open = mem_open,
+ .read = mem_read,
+};
+
+static void __devinit add_debugfs_mem(struct adapter *adap, const char *name,
+ unsigned int idx, unsigned int size_mb)
+{
+ struct dentry *de;
+
+ de = debugfs_create_file(name, S_IRUSR, adap->debugfs_root,
+ (void *)adap + idx, &mem_debugfs_fops);
+ if (de && de->d_inode)
+ de->d_inode->i_size = size_mb << 20;
+}
+
+static int __devinit setup_debugfs(struct adapter *adap)
+{
+ int i;
+
+ if (!adap->debugfs_root)
+ return -1;
+
+ i = t4_read_reg(adap, MA_TARGET_MEM_ENABLE);
+ if (i & EDRAM0_ENABLE)
+ add_debugfs_mem(adap, "edc0", MEM_EDC0, 5);
+ if (i & EDRAM1_ENABLE)
+ add_debugfs_mem(adap, "edc1", MEM_EDC1, 5);
+ if (i & EXT_MEM_ENABLE)
+ add_debugfs_mem(adap, "mc", MEM_MC,
+ EXT_MEM_SIZE_GET(t4_read_reg(adap, MA_EXT_MEMORY_BAR)));
+ return 0;
+}
+
+/*
+ * /proc support
+ */
+
+#define DEFINE_SIMPLE_PROC_FILE(name) \
+static int name##_open(struct inode *inode, struct file *file) \
+{ \
+ return single_open(file, name##_show, PDE(inode)->data); \
+} \
+static const struct file_operations name##_proc_fops = { \
+ .owner = THIS_MODULE, \
+ .open = name##_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release \
+}
+
+static int sge_stats_show(struct seq_file *seq, void *v)
+{
+ struct adapter *adap = seq->private;
+ int eth_entries = DIV_ROUND_UP(adap->sge.ethqsets, 4);
+ int ofld_entries = DIV_ROUND_UP(adap->sge.ofldqsets, 4);
+ int rdma_entries = DIV_ROUND_UP(adap->sge.rdmaqs, 4);
+ int ctrl_entries = DIV_ROUND_UP(MAX_CTRL_QUEUES, 4);
+ int i, r = (uintptr_t)v - 1;
+
+ if (r)
+ seq_putc(seq, '\n');
+
+#define S3(fmt_spec, s, v) do { \
+ seq_printf(seq, "%-12s", s); \
+ for (i = 0; i < n; ++i) \
+ seq_printf(seq, " %16" fmt_spec, v); \
+ seq_putc(seq, '\n'); \
+} while (0)
+#define S(s, v) S3("s", s, v)
+#define T3(fmt_spec, s, v) S3(fmt_spec, s, tx[i].v)
+#define T(s, v) T3("lu", s, v)
+#define R3(fmt_spec, s, v) S3(fmt_spec, s, qs[i].v)
+#define R(s, v) R3("lu", s, v)
+
+ if (r < eth_entries) {
+ const struct sge_eth_rxq *qs = &adap->sge.ethrxq[r * 4];
+ const struct sge_eth_txq *tx = &adap->sge.ethtxq[r * 4];
+ int n = min(4, adap->sge.ethqsets - 4 * r);
+
+ S("QType:", "Ethernet");
+ S("Interface:",
+ qs[i].rspq.netdev ? qs[i].rspq.netdev->name : "N/A");
+ R("RxPackets:", stats.pkts);
+ R("RxCSO:", stats.rx_cso);
+ R("VLANxtract:", stats.vlan_ex);
+ R("LROmerged:", stats.lro_merged);
+ R("LROpackets:", stats.lro_pkts);
+ R("RxDrops:", stats.rx_drops);
+ T("TSO:", tso);
+ T("TxCSO:", tx_cso);
+ T("VLANins:", vlan_ins);
+ T("TxQFull:", q.stops);
+ T("TxQRestarts:", q.restarts);
+ T("TxMapErr:", mapping_err);
+ R("FLAllocErr:", fl.alloc_failed);
+ R("FLLrgAlcErr:", fl.large_alloc_failed);
+ R("FLstarving:", fl.starving);
+ } else if ((r -= eth_entries) < ofld_entries) {
+ const struct sge_ofld_rxq *qs = &adap->sge.ofldrxq[r * 4];
+ const struct sge_ofld_txq *tx = &adap->sge.ofldtxq[r * 4];
+ int n = min(4, adap->sge.ofldqsets - 4 * r);
+
+ S("QType:", "OFLD");
+ R("RxPackets:", stats.pkts);
+ R("RxImmPkts:", stats.imm);
+ R("RxNoMem:", stats.nomem);
+ T("TxQFull:", q.stops);
+ T("TxQRestarts:", q.restarts);
+ T("TxMapErr:", mapping_err);
+ R("FLAllocErr:", fl.alloc_failed);
+ R("FLLrgAlcErr:", fl.large_alloc_failed);
+ R("FLstarving:", fl.starving);
+ } else if ((r -= ofld_entries) < rdma_entries) {
+ const struct sge_ofld_rxq *qs = &adap->sge.rdmarxq[r * 4];
+ int n = min(4, adap->sge.rdmaqs - 4 * r);
+
+ S("QType:", "RDMA");
+ R("RxPackets:", stats.pkts);
+ R("RxImmPkts:", stats.imm);
+ R("RxAN:", stats.an);
+ R("RxNoMem:", stats.nomem);
+ R("FLAllocErr:", fl.alloc_failed);
+ R("FLstarving:", fl.starving);
+ } else if ((r -= rdma_entries) < ctrl_entries) {
+ const struct sge_ctrl_txq *tx = &adap->sge.ctrlq[r * 4];
+ int n = min(4, MAX_CTRL_QUEUES - 4 * r);
+
+ S("QType:", "Control");
+ T("TxQFull:", q.stops);
+ T("TxQRestarts:", q.restarts);
+ } else if ((r -= ctrl_entries) == 0) {
+ seq_printf(seq, "%-12s %16s\n", "QType:", "FW event queue");
+ }
+#undef R
+#undef T
+#undef S
+#undef R3
+#undef T3
+#undef S3
+ return 0;
+}
+
+static int sge_queue_entries(const struct adapter *adap)
+{
+ return DIV_ROUND_UP(adap->sge.ethqsets, 4) +
+ DIV_ROUND_UP(adap->sge.ofldqsets, 4) +
+ DIV_ROUND_UP(adap->sge.rdmaqs, 4) +
+ DIV_ROUND_UP(MAX_CTRL_QUEUES, 4) + 1;
+}
+
+static void *sge_queue_start(struct seq_file *seq, loff_t *pos)
+{
+ int entries = sge_queue_entries(seq->private);
+
+ return *pos < entries ? (void *)((uintptr_t)*pos + 1) : NULL;
+}
+
+static void *sge_queue_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ int entries = sge_queue_entries(seq->private);
+
+ ++*pos;
+ return *pos < entries ? (void *)((uintptr_t)*pos + 1) : NULL;
+}
+
+static const struct seq_operations sge_stats_seq_ops = {
+ .start = sge_queue_start,
+ .next = sge_queue_next,
+ .stop = seq_noop_stop,
+ .show = sge_stats_show
+};
+
+static int sge_stats_open(struct inode *inode, struct file *file)
+{
+ int res = seq_open(file, &sge_stats_seq_ops);
+
+ if (!res) {
+ struct seq_file *seq = file->private_data;
+ seq->private = PDE(inode)->data;
+ }
+ return res;
+}
+
+static const struct file_operations sge_stats_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = sge_stats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int lb_stats_show(struct seq_file *seq, void *v)
+{
+ static const char *stat_name[] = {
+ "OctetsOK:", "FramesOK:", "BcastFrames:", "McastFrames:",
+ "UcastFrames:", "ErrorFrames:", "Frames64:", "Frames65To127:",
+ "Frames128To255:", "Frames256To511:", "Frames512To1023:",
+ "Frames1024To1518:", "Frames1519ToMax:", "FramesDropped:",
+ "BG0FramesDropped:", "BG1FramesDropped:", "BG2FramesDropped:",
+ "BG3FramesDropped:", "BG0FramesTrunc:", "BG1FramesTrunc:",
+ "BG2FramesTrunc:", "BG3FramesTrunc:"
+ };
+
+ int i, j;
+ u64 *p0, *p1;
+ struct lb_port_stats s[2];
+
+ memset(s, 0, sizeof(s));
+
+ for (i = 0; i < 4; i += 2) {
+ t4_get_lb_stats(seq->private, i, &s[0]);
+ t4_get_lb_stats(seq->private, i + 1, &s[1]);
+
+ p0 = &s[0].octets;
+ p1 = &s[1].octets;
+ seq_printf(seq, "%s Loopback %u "
+ " Loopback %u\n", i == 0 ? "" : "\n", i, i + 1);
+
+ for (j = 0; j < ARRAY_SIZE(stat_name); j++)
+ seq_printf(seq, "%-17s %20llu %20llu\n", stat_name[j],
+ (unsigned long long)*p0++,
+ (unsigned long long)*p1++);
+ }
+ return 0;
+}
+
+DEFINE_SIMPLE_PROC_FILE(lb_stats);
+
+static int tcp_stats_show(struct seq_file *seq, void *v)
+{
+ struct tp_tcp_stats v4, v6;
+ struct adapter *adap = seq->private;
+
+ spin_lock(&adap->stats_lock);
+ t4_tp_get_tcp_stats(adap, &v4, &v6);
+ spin_unlock(&adap->stats_lock);
+
+ seq_puts(seq,
+ " IP IPv6\n");
+ seq_printf(seq, "OutRsts: %20u %20u\n",
+ v4.tcpOutRsts, v6.tcpOutRsts);
+ seq_printf(seq, "InSegs: %20llu %20llu\n",
+ (unsigned long long)v4.tcpInSegs,
+ (unsigned long long)v6.tcpInSegs);
+ seq_printf(seq, "OutSegs: %20llu %20llu\n",
+ (unsigned long long)v4.tcpOutSegs,
+ (unsigned long long)v6.tcpOutSegs);
+ seq_printf(seq, "RetransSegs: %20llu %20llu\n",
+ (unsigned long long)v4.tcpRetransSegs,
+ (unsigned long long)v6.tcpRetransSegs);
+ return 0;
+}
+
+DEFINE_SIMPLE_PROC_FILE(tcp_stats);
+
+static int tp_err_stats_show(struct seq_file *seq, void *v)
+{
+ struct tp_err_stats stats;
+ struct adapter *adap = seq->private;
+
+ spin_lock(&adap->stats_lock);
+ t4_tp_get_err_stats(adap, &stats);
+ spin_unlock(&adap->stats_lock);
+
+ seq_puts(seq, " channel 0 channel 1 channel 2 "
+ "channel 3\n");
+ seq_printf(seq, "macInErrs: %10u %10u %10u %10u\n",
+ stats.macInErrs[0], stats.macInErrs[1], stats.macInErrs[2],
+ stats.macInErrs[3]);
+ seq_printf(seq, "hdrInErrs: %10u %10u %10u %10u\n",
+ stats.hdrInErrs[0], stats.hdrInErrs[1], stats.hdrInErrs[2],
+ stats.hdrInErrs[3]);
+ seq_printf(seq, "tcpInErrs: %10u %10u %10u %10u\n",
+ stats.tcpInErrs[0], stats.tcpInErrs[1], stats.tcpInErrs[2],
+ stats.tcpInErrs[3]);
+ seq_printf(seq, "tcp6InErrs: %10u %10u %10u %10u\n",
+ stats.tcp6InErrs[0], stats.tcp6InErrs[1],
+ stats.tcp6InErrs[2], stats.tcp6InErrs[3]);
+ seq_printf(seq, "tnlCongDrops: %10u %10u %10u %10u\n",
+ stats.tnlCongDrops[0], stats.tnlCongDrops[1],
+ stats.tnlCongDrops[2], stats.tnlCongDrops[3]);
+ seq_printf(seq, "tnlTxDrops: %10u %10u %10u %10u\n",
+ stats.tnlTxDrops[0], stats.tnlTxDrops[1],
+ stats.tnlTxDrops[2], stats.tnlTxDrops[3]);
+ seq_printf(seq, "ofldVlanDrops: %10u %10u %10u %10u\n",
+ stats.ofldVlanDrops[0], stats.ofldVlanDrops[1],
+ stats.ofldVlanDrops[2], stats.ofldVlanDrops[3]);
+ seq_printf(seq, "ofldChanDrops: %10u %10u %10u %10u\n\n",
+ stats.ofldChanDrops[0], stats.ofldChanDrops[1],
+ stats.ofldChanDrops[2], stats.ofldChanDrops[3]);
+ seq_printf(seq, "ofldNoNeigh: %u\nofldCongDefer: %u\n",
+ stats.ofldNoNeigh, stats.ofldCongDefer);
+ return 0;
+}
+
+DEFINE_SIMPLE_PROC_FILE(tp_err_stats);
+
+static int rss_show(struct seq_file *seq, void *v, int idx)
+{
+ u16 *entry = v;
+
+ seq_printf(seq, "%4d: %4u %4u %4u %4u %4u %4u %4u %4u\n",
+ idx * 8, entry[0], entry[1], entry[2], entry[3], entry[4],
+ entry[5], entry[6], entry[7]);
+ return 0;
+}
+
+static int rss_open(struct inode *inode, struct file *file)
+{
+ int ret;
+ struct seq_tab *p;
+
+ p = seq_open_tab(file, RSS_NENTRIES / 8, 8 * sizeof(u16), 0, rss_show);
+ if (!p)
+ return -ENOMEM;
+ ret = t4_read_rss(PDE(inode)->data, (u16 *)p->data);
+ if (ret)
+ seq_release_private(inode, file);
+ return ret;
+}
+
+static const struct file_operations rss_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = rss_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private
+};
+
+static int mtutab_show(struct seq_file *seq, void *v)
+{
+ u16 mtus[NMTUS];
+ struct adapter *adap = seq->private;
+
+ spin_lock(&adap->stats_lock);
+ t4_read_mtu_tbl(adap, mtus, NULL);
+ spin_unlock(&adap->stats_lock);
+
+ seq_printf(seq, "%u %u %u %u %u %u %u %u %u %u %u %u %u %u %u %u\n",
+ mtus[0], mtus[1], mtus[2], mtus[3], mtus[4], mtus[5],
+ mtus[6], mtus[7], mtus[8], mtus[9], mtus[10], mtus[11],
+ mtus[12], mtus[13], mtus[14], mtus[15]);
+ return 0;
+}
+
+static int mtutab_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mtutab_show, PDE(inode)->data);
+}
+
+static ssize_t mtutab_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ int i;
+ unsigned long mtus[NMTUS];
+ struct adapter *adap = PDE(file->f_path.dentry->d_inode)->data;
+
+ if (adap->flags & FULL_INIT_DONE)
+ return -EBUSY;
+
+ /* Require min MTU of 81 to accommodate SACK */
+ i = rd_usr_int_vec(buf, count, NMTUS, mtus, 81, MAX_MTU, 10);
+ if (i)
+ return i;
+
+ /* MTUs must be in ascending order */
+ for (i = 1; i < NMTUS; ++i)
+ if (mtus[i] < mtus[i - 1])
+ return -EINVAL;
+
+ for (i = 0; i < NMTUS; ++i)
+ adap->params.mtus[i] = mtus[i];
+ t4_load_mtus(adap, adap->params.mtus, adap->params.a_wnd,
+ adap->params.b_wnd);
+ return count;
+}
+
+static const struct file_operations mtutab_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = mtutab_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = mtutab_write
+};
+
+static int mps_trc_show(struct seq_file *seq, void *v)
+{
+ int enabled, i;
+ struct trace_params tp;
+ struct adapter *adap = seq->private;
+ unsigned int trcidx = (uintptr_t)adap & 3;
+
+ adap = (void *)adap - trcidx;
+ t4_get_trace_filter(adap, &tp, trcidx, &enabled);
+ if (!enabled) {
+ seq_puts(seq, "tracer is disabled\n");
+ return 0;
+ }
+
+ if (tp.skip_ofst * 8 >= TRACE_LEN) {
+ dev_err(adap->pdev_dev, "illegal trace pattern skip offset\n");
+ return -EINVAL;
+ }
+ if (tp.port < 8) {
+ i = adap->chan_map[tp.port & 3];
+ if (i >= MAX_NPORTS) {
+ dev_err(adap->pdev_dev, "tracer %u is assigned "
+ "to non-existing port\n", trcidx);
+ return -EINVAL;
+ }
+ seq_printf(seq, "tracer is capturing %s %s, ",
+ adap->port[i]->name, tp.port < 4 ? "Rx" : "Tx");
+ } else
+ seq_printf(seq, "tracer is capturing loopback %d, ",
+ tp.port - 8);
+ seq_printf(seq, "snap length: %u, min length: %u\n", tp.snap_len,
+ tp.min_len);
+ seq_printf(seq, "packets captured %smatch filter\n",
+ tp.invert ? "do not " : "");
+
+ if (tp.skip_ofst) {
+ seq_puts(seq, "filter pattern: ");
+ for (i = 0; i < tp.skip_ofst * 2; i += 2)
+ seq_printf(seq, "%08x%08x", tp.data[i], tp.data[i + 1]);
+ seq_putc(seq, '/');
+ for (i = 0; i < tp.skip_ofst * 2; i += 2)
+ seq_printf(seq, "%08x%08x", tp.mask[i], tp.mask[i + 1]);
+ seq_puts(seq, "@0\n");
+ }
+
+ seq_puts(seq, "filter pattern: ");
+ for (i = tp.skip_ofst * 2; i < TRACE_LEN / 4; i += 2)
+ seq_printf(seq, "%08x%08x", tp.data[i], tp.data[i + 1]);
+ seq_putc(seq, '/');
+ for (i = tp.skip_ofst * 2; i < TRACE_LEN / 4; i += 2)
+ seq_printf(seq, "%08x%08x", tp.mask[i], tp.mask[i + 1]);
+ seq_printf(seq, "@%u\n", (tp.skip_ofst + tp.skip_len) * 8);
+ return 0;
+}
+
+static int mps_trc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mps_trc_show, PDE(inode)->data);
+}
+
+static unsigned int xdigit2int(unsigned char c)
+{
+ return isdigit(c) ? c - '0' : tolower(c) - 'a' + 10;
+}
+
+#define TRC_PORT_NONE 0xff
+
+/*
+ * Set an MPS trace filter. Syntax is:
+ *
+ * disable
+ *
+ * to disable tracing, or
+ *
+ * interface [snaplen=<val>] [minlen=<val>] [not] [<pattern>]...
+ *
+ * where interface is one of rxN, txN, or loopbackN, N = 0..3, and pattern
+ * has the form
+ *
+ * <pattern data>[/<pattern mask>][@<anchor>]
+ *
+ * Up to 2 filter patterns can be specified. If 2 are supplied the first one
+ * must be anchored at 0. An omited mask is taken as a mask of 1s, an omitted
+ * anchor is taken as 0.
+ */
+static ssize_t mps_trc_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ int i, j, enable;
+ u32 *data, *mask;
+ struct trace_params tp;
+ char *s, *p, *word, *end;
+ struct adapter *adap = PDE(file->f_path.dentry->d_inode)->data;
+ unsigned int trcidx = (uintptr_t)adap & 3;
+
+ adap = (void *)adap - trcidx;
+
+ /*
+ * Don't accept input more than 1K, can't be anything valid except lots
+ * of whitespace. Well, use less.
+ */
+ if (count > 1024)
+ return -EFBIG;
+ p = s = kzalloc(count + 1, GFP_USER);
+ if (!s)
+ return -ENOMEM;
+ if (copy_from_user(s, buf, count)) {
+ count = -EFAULT;
+ goto out;
+ }
+
+ if (s[count - 1] == '\n')
+ s[count - 1] = '\0';
+
+ enable = strcmp("disable", s) != 0;
+ if (!enable)
+ goto apply;
+
+ memset(&tp, 0, sizeof(tp));
+ tp.port = TRC_PORT_NONE;
+ i = 0; /* counts pattern nibbles */
+
+ while (p) {
+ while (isspace(*p))
+ p++;
+ word = strsep(&p, " ");
+ if (!*word)
+ break;
+
+ if (!strncmp(word, "snaplen=", 8)) {
+ j = simple_strtoul(word + 8, &end, 10);
+ if (*end || j > 9600) {
+inval: count = -EINVAL;
+ goto out;
+ }
+ tp.snap_len = j;
+ continue;
+ }
+ if (!strncmp(word, "minlen=", 7)) {
+ j = simple_strtoul(word + 7, &end, 10);
+ if (*end || j > 0x1ff)
+ goto inval;
+ tp.min_len = j;
+ continue;
+ }
+ if (!strcmp(word, "not")) {
+ tp.invert = !tp.invert;
+ continue;
+ }
+ if (!strncmp(word, "loopback", 8) && tp.port == TRC_PORT_NONE) {
+ if (word[8] < '0' || word[8] > '3' || word[9])
+ goto inval;
+ tp.port = word[8] - '0' + 8;
+ continue;
+ }
+ if (!strncmp(word, "tx", 2) && tp.port == TRC_PORT_NONE) {
+ if (word[2] < '0' || word[2] > '3' || word[3])
+ goto inval;
+ tp.port = word[2] - '0' + 4;
+ if (adap->chan_map[tp.port & 3] >= MAX_NPORTS)
+ goto inval;
+ continue;
+ }
+ if (!strncmp(word, "rx", 2) && tp.port == TRC_PORT_NONE) {
+ if (word[2] < '0' || word[2] > '3' || word[3])
+ goto inval;
+ tp.port = word[2] - '0';
+ if (adap->chan_map[tp.port] >= MAX_NPORTS)
+ goto inval;
+ continue;
+ }
+ if (!isxdigit(*word))
+ goto inval;
+
+ /* we have found a trace pattern */
+ if (i) { /* split pattern */
+ if (tp.skip_len) /* too many splits */
+ goto inval;
+ tp.skip_ofst = i / 16;
+ }
+
+ data = &tp.data[i / 8];
+ mask = &tp.mask[i / 8];
+ j = i;
+
+ while (isxdigit(*word)) {
+ if (i >= TRACE_LEN * 2) {
+ count = -EFBIG;
+ goto out;
+ }
+ *data = (*data << 4) + xdigit2int(*word++);
+ if (++i % 8 == 0)
+ data++;
+ }
+ if (*word == '/') {
+ word++;
+ while (isxdigit(*word)) {
+ if (j >= i) /* mask longer than data */
+ goto inval;
+ *mask = (*mask << 4) + xdigit2int(*word++);
+ if (++j % 8 == 0)
+ mask++;
+ }
+ if (i != j) /* mask shorter than data */
+ goto inval;
+ } else { /* no mask, use all 1s */
+ for ( ; i - j >= 8; j += 8)
+ *mask++ = 0xffffffff;
+ if (i % 8)
+ *mask = (1 << (i % 8) * 4) - 1;
+ }
+ if (*word == '@') {
+ j = simple_strtoul(word + 1, &end, 10);
+ if (*end && *end != '\n')
+ goto inval;
+ if (j & 7) /* doesn't start at multiple of 8 */
+ goto inval;
+ j /= 8;
+ if (j < tp.skip_ofst) /* overlaps earlier pattern */
+ goto inval;
+ if (j - tp.skip_ofst > 31) /* skip too big */
+ goto inval;
+ tp.skip_len = j - tp.skip_ofst;
+ }
+ if (i % 8) {
+ *data <<= (8 - i % 8) * 4;
+ *mask <<= (8 - i % 8) * 4;
+ i = (i + 15) & ~15; /* 8-byte align */
+ }
+ }
+
+ if (tp.port == TRC_PORT_NONE)
+ goto inval;
+apply:
+ i = t4_set_trace_filter(adap, &tp, trcidx, enable);
+ if (i)
+ count = i;
+out:
+ kfree(s);
+ return count;
+}
+
+static const struct file_operations mps_trc_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = mps_trc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = mps_trc_write
+};
+
+static int tid_info_show(struct seq_file *seq, void *v)
+{
+ struct adapter *adap = seq->private;
+ const struct tid_info *t = &adap->tids;
+
+ if (t4_read_reg(adap, LE_DB_CONFIG) & HASHEN) {
+ unsigned int sb = t4_read_reg(adap, LE_DB_SERVER_INDEX) / 4;
+
+ if (sb)
+ seq_printf(seq, "TID range: 0..%u/%u..%u", sb - 1,
+ t4_read_reg(adap, LE_DB_TID_HASHBASE) / 4,
+ t->ntids - 1);
+ else
+ seq_printf(seq, "TID range: %u..%u",
+ t4_read_reg(adap, LE_DB_TID_HASHBASE) / 4,
+ t->ntids - 1);
+ } else
+ seq_printf(seq, "TID range: 0..%u", t->ntids - 1);
+ seq_printf(seq, ", in use: %u\n", atomic_read(&t->tids_in_use));
+ seq_printf(seq, "STID range: %u..%u, in use: %u\n", t->stid_base,
+ t->stid_base + t->nstids - 1, t->stids_in_use);
+ seq_printf(seq, "ATID range: 0..%u, in use: %u\n", t->natids - 1,
+ t->atids_in_use);
+ seq_printf(seq, "FTID range: %u..%u\n", t->ftid_base,
+ t->ftid_base + t->nftids - 1);
+ seq_printf(seq, "HW TID usage: %u IP users, %u IPv6 users\n",
+ t4_read_reg(adap, LE_DB_ACT_CNT_IPV4),
+ t4_read_reg(adap, LE_DB_ACT_CNT_IPV6));
+ return 0;
+}
+
+DEFINE_SIMPLE_PROC_FILE(tid_info);
+
+static int uld_show(struct seq_file *seq, void *v)
+{
+ int i;
+ struct adapter *adap = seq->private;
+
+ for (i = 0; i < CXGB4_ULD_MAX; i++)
+ if (adap->uld_handle[i])
+ seq_printf(seq, "%s: %s\n", uld_str[i], ulds[i].name);
+ return 0;
+}
+
+DEFINE_SIMPLE_PROC_FILE(uld);
+
+enum {
+ ADAP_NEED_L2T = 1 << 0,
+ ADAP_NEED_OFLD = 1 << 1,
+};
+
+struct cxgb4_proc_entry {
+ const char *name;
+ mode_t mode;
+ unsigned int req; /* adapter requirements to create this file */
+ unsigned char data; /* data passed in low bits of adapter pointer */
+ const struct file_operations *fops;
+};
+
+static struct cxgb4_proc_entry proc_files[] = {
+ { "l2t", 0444, ADAP_NEED_L2T, 0, &t4_l2t_proc_fops },
+ { "lb_stats", 0444, 0, 0, &lb_stats_proc_fops },
+ { "path_mtus", 0644, 0, 0, &mtutab_proc_fops },
+ { "qstats", 0444, 0, 0, &sge_stats_proc_fops },
+ { "rss", 0444, 0, 0, &rss_proc_fops },
+ { "tcp_stats", 0444, 0, 0, &tcp_stats_proc_fops },
+ { "tids", 0444, ADAP_NEED_OFLD, 0, &tid_info_proc_fops },
+ { "tp_err_stats", 0444, 0, 0, &tp_err_stats_proc_fops },
+ { "trace0", 0644, 0, 0, &mps_trc_proc_fops },
+ { "trace1", 0644, 0, 1, &mps_trc_proc_fops },
+ { "trace2", 0644, 0, 2, &mps_trc_proc_fops },
+ { "trace3", 0644, 0, 3, &mps_trc_proc_fops },
+ { "uld", 0444, 0, 0, &uld_proc_fops },
+};
+
+static int __devinit setup_proc(struct adapter *adap,
+ struct proc_dir_entry *dir)
+{
+ int i, created;
+ struct proc_dir_entry *p;
+ int ofld = is_offload(adap);
+
+ if (!dir)
+ return -EINVAL;
+
+ /* If we can create any of the entries we do. */
+ for (created = i = 0; i < ARRAY_SIZE(proc_files); ++i) {
+ unsigned int req = proc_files[i].req;
+
+ if ((req & ADAP_NEED_OFLD) && !ofld)
+ continue;
+ if ((req & ADAP_NEED_L2T) && !adap->l2t)
+ continue;
+
+ p = proc_create_data(proc_files[i].name, proc_files[i].mode,
+ dir, proc_files[i].fops,
+ (void *)adap + proc_files[i].data);
+ if (p)
+ created++;
+ }
+
+ return created;
+}
+
+static void cleanup_proc(struct proc_dir_entry *dir)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(proc_files); ++i)
+ remove_proc_entry(proc_files[i].name, dir);
+}
+
+/*
+ * upper-layer driver support
+ */
+
+/*
+ * Allocate an active-open TID and set it to the supplied value.
+ */
+int cxgb4_alloc_atid(struct tid_info *t, void *data)
+{
+ int atid = -1;
+
+ spin_lock_bh(&t->atid_lock);
+ if (t->afree) {
+ union aopen_entry *p = t->afree;
+
+ atid = p - t->atid_tab;
+ t->afree = p->next;
+ p->data = data;
+ t->atids_in_use++;
+ }
+ spin_unlock_bh(&t->atid_lock);
+ return atid;
+}
+EXPORT_SYMBOL(cxgb4_alloc_atid);
+
+/*
+ * Release an active-open TID.
+ */
+void cxgb4_free_atid(struct tid_info *t, unsigned int atid)
+{
+ union aopen_entry *p = &t->atid_tab[atid];
+
+ spin_lock_bh(&t->atid_lock);
+ p->next = t->afree;
+ t->afree = p;
+ t->atids_in_use--;
+ spin_unlock_bh(&t->atid_lock);
+}
+EXPORT_SYMBOL(cxgb4_free_atid);
+
+/*
+ * Allocate a server TID and set it to the supplied value.
+ */
+int cxgb4_alloc_stid(struct tid_info *t, int family, void *data)
+{
+ int stid;
+
+ spin_lock_bh(&t->stid_lock);
+ if (family == PF_INET) {
+ stid = find_first_zero_bit(t->stid_bmap, t->nstids);
+ if (stid < t->nstids)
+ __set_bit(stid, t->stid_bmap);
+ else
+ stid = -1;
+ } else {
+ stid = bitmap_find_free_region(t->stid_bmap, t->nstids, 2);
+ if (stid < 0)
+ stid = -1;
+ }
+ if (stid >= 0) {
+ t->stid_tab[stid].data = data;
+ stid += t->stid_base;
+ t->stids_in_use++;
+ }
+ spin_unlock_bh(&t->stid_lock);
+ return stid;
+}
+EXPORT_SYMBOL(cxgb4_alloc_stid);
+
+/*
+ * Release a server TID.
+ */
+void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family)
+{
+ stid -= t->stid_base;
+ spin_lock_bh(&t->stid_lock);
+ if (family == PF_INET)
+ __clear_bit(stid, t->stid_bmap);
+ else
+ bitmap_release_region(t->stid_bmap, stid, 2);
+ t->stid_tab[stid].data = NULL;
+ t->stids_in_use--;
+ spin_unlock_bh(&t->stid_lock);
+}
+EXPORT_SYMBOL(cxgb4_free_stid);
+
+/*
+ * Populate a TID_RELEASE WR. Caller must properly size the skb.
+ */
+static void mk_tid_release(struct sk_buff *skb, unsigned int chan,
+ unsigned int tid)
+{
+ struct cpl_tid_release *req;
+
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, chan);
+ req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
+ INIT_TP_WR(req, tid);
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
+}
+
+/*
+ * Queue a TID release request and if necessary schedule a work queue to
+ * process it.
+ */
+void cxgb4_queue_tid_release(struct tid_info *t, unsigned int chan,
+ unsigned int tid)
+{
+ void **p = &t->tid_tab[tid];
+ struct adapter *adap = container_of(t, struct adapter, tids);
+
+ spin_lock_bh(&adap->tid_release_lock);
+ *p = adap->tid_release_head;
+ /* Low 2 bits encode the Tx channel number */
+ adap->tid_release_head = (void **)((uintptr_t)p | chan);
+ if (!*p)
+ schedule_work(&adap->tid_release_task);
+ spin_unlock_bh(&adap->tid_release_lock);
+}
+EXPORT_SYMBOL(cxgb4_queue_tid_release);
+
+/*
+ * Process the list of pending TID release requests.
+ */
+static void process_tid_release_list(struct work_struct *work)
+{
+ struct sk_buff *skb;
+ struct adapter *adap;
+
+ adap = container_of(work, struct adapter, tid_release_task);
+
+ spin_lock_bh(&adap->tid_release_lock);
+ while (adap->tid_release_head) {
+ void **p = adap->tid_release_head;
+ unsigned int chan = (uintptr_t)p & 3;
+ p = (void *)p - chan;
+
+ adap->tid_release_head = *p;
+ *p = NULL;
+ spin_unlock_bh(&adap->tid_release_lock);
+
+ while (!(skb = alloc_skb(sizeof(struct cpl_tid_release),
+ GFP_KERNEL)))
+ yield();
+
+ mk_tid_release(skb, chan, p - adap->tids.tid_tab);
+ t4_ofld_send(adap, skb);
+ spin_lock_bh(&adap->tid_release_lock);
+ }
+ spin_unlock_bh(&adap->tid_release_lock);
+}
+
+/*
+ * Release a TID and inform HW. If we are unable to allocate the release
+ * message we defer to a work queue.
+ */
+void cxgb4_remove_tid(struct tid_info *t, unsigned int chan, unsigned int tid)
+{
+ struct sk_buff *skb;
+ struct adapter *adap = container_of(t, struct adapter, tids);
+
+ WARN_ON(tid >= t->ntids);
+
+ skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
+ if (likely(skb)) {
+ t->tid_tab[tid] = NULL;
+ mk_tid_release(skb, chan, tid);
+ t4_ofld_send(adap, skb);
+ } else
+ cxgb4_queue_tid_release(t, chan, tid);
+ atomic_dec(&t->tids_in_use);
+}
+EXPORT_SYMBOL(cxgb4_remove_tid);
+
+/*
+ * Allocate and initialize the TID tables. Returns 0 on success.
+ */
+static int tid_init(struct tid_info *t)
+{
+ size_t size;
+ unsigned int natids = t->natids;
+
+ size = t->ntids * sizeof(*t->tid_tab) + natids * sizeof(*t->atid_tab) +
+ t->nstids * sizeof(*t->stid_tab) +
+ BITS_TO_LONGS(t->nstids) * sizeof(long);
+ t->tid_tab = t4_alloc_mem(size);
+ if (!t->tid_tab)
+ return -ENOMEM;
+
+ t->atid_tab = (union aopen_entry *)&t->tid_tab[t->ntids];
+ t->stid_tab = (struct serv_entry *)&t->atid_tab[natids];
+ t->stid_bmap = (unsigned long *)&t->stid_tab[t->nstids];
+ spin_lock_init(&t->stid_lock);
+ spin_lock_init(&t->atid_lock);
+
+ t->stids_in_use = 0;
+ t->afree = NULL;
+ t->atids_in_use = 0;
+ atomic_set(&t->tids_in_use, 0);
+
+ /* Setup the free list for atid_tab and clear the stid bitmap. */
+ if (natids) {
+ while (--natids)
+ t->atid_tab[natids - 1].next = &t->atid_tab[natids];
+ t->afree = t->atid_tab;
+ }
+ bitmap_zero(t->stid_bmap, t->nstids);
+ return 0;
+}
+
+/**
+ * cxgb4_create_server - create an IP server
+ * @dev: the device
+ * @stid: the server TID
+ * @sip: local IP address to bind server to
+ * @sport: the server's TCP port
+ * @queue: queue to direct messages from this server to
+ *
+ * Create an IP server for the given port and address.
+ * Returns <0 on error and one of the %NET_XMIT_* values on success.
+ */
+int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
+ __be32 sip, __be16 sport, unsigned int queue)
+{
+ unsigned int chan;
+ struct sk_buff *skb;
+ struct adapter *adap;
+ struct cpl_pass_open_req *req;
+
+ skb = alloc_skb(sizeof(*req), GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ adap = netdev2adap(dev);
+ req = (struct cpl_pass_open_req *)__skb_put(skb, sizeof(*req));
+ INIT_TP_WR(req, 0);
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, stid));
+ req->local_port = sport;
+ req->peer_port = htons(0);
+ req->local_ip = sip;
+ req->peer_ip = htonl(0);
+ chan = netdev2pinfo(adap->sge.ingr_map[queue]->netdev)->tx_chan;
+ req->opt0 = cpu_to_be64(TX_CHAN(chan));
+ req->opt1 = cpu_to_be64(CONN_POLICY_ASK |
+ SYN_RSS_ENABLE | SYN_RSS_QUEUE(queue));
+ return t4_mgmt_tx(adap, skb);
+}
+EXPORT_SYMBOL(cxgb4_create_server);
+
+/**
+ * cxgb4_create_server6 - create an IPv6 server
+ * @dev: the device
+ * @stid: the server TID
+ * @sip: local IPv6 address to bind server to
+ * @sport: the server's TCP port
+ * @queue: queue to direct messages from this server to
+ *
+ * Create an IPv6 server for the given port and address.
+ * Returns <0 on error and one of the %NET_XMIT_* values on success.
+ */
+int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
+ const struct in6_addr *sip, __be16 sport,
+ unsigned int queue)
+{
+ unsigned int chan;
+ struct sk_buff *skb;
+ struct adapter *adap;
+ struct cpl_pass_open_req6 *req;
+
+ skb = alloc_skb(sizeof(*req), GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ adap = netdev2adap(dev);
+ req = (struct cpl_pass_open_req6 *)__skb_put(skb, sizeof(*req));
+ INIT_TP_WR(req, 0);
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ6, stid));
+ req->local_port = sport;
+ req->peer_port = htons(0);
+ req->local_ip_hi = *(__be64 *)(sip->s6_addr);
+ req->local_ip_lo = *(__be64 *)(sip->s6_addr + 8);
+ req->peer_ip_hi = cpu_to_be64(0);
+ req->peer_ip_lo = cpu_to_be64(0);
+ chan = netdev2pinfo(adap->sge.ingr_map[queue]->netdev)->tx_chan;
+ req->opt0 = cpu_to_be64(TX_CHAN(chan));
+ req->opt1 = cpu_to_be64(CONN_POLICY_ASK |
+ SYN_RSS_ENABLE | SYN_RSS_QUEUE(queue));
+ return t4_mgmt_tx(adap, skb);
+}
+EXPORT_SYMBOL(cxgb4_create_server6);
+
+/**
+ * cxgb4_best_mtu - find the entry in the MTU table closest to an MTU
+ * @mtus: the HW MTU table
+ * @mtu: the target MTU
+ * @idx: index of selected entry in the MTU table
+ *
+ * Returns the index and the value in the HW MTU table that is closest to
+ * but does not exceed @mtu, unless @mtu is smaller than any value in the
+ * table, in which case that smallest available value is selected.
+ */
+unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
+ unsigned int *idx)
+{
+ unsigned int i = 0;
+
+ while (i < NMTUS - 1 && mtus[i + 1] <= mtu)
+ ++i;
+ if (idx)
+ *idx = i;
+ return mtus[i];
+}
+EXPORT_SYMBOL(cxgb4_best_mtu);
+
+/**
+ * cxgb4_port_chan - get the HW channel of a port
+ * @dev: the net device for the port
+ *
+ * Return the HW Tx channel of the given port.
+ */
+unsigned int cxgb4_port_chan(const struct net_device *dev)
+{
+ return netdev2pinfo(dev)->tx_chan;
+}
+EXPORT_SYMBOL(cxgb4_port_chan);
+
+/**
+ * cxgb4_netdev_by_hwid - return the net device of a HW port
+ * @pdev: identifies the adapter
+ * @id: the HW port id
+ *
+ * Return the net device associated with the interface with the given HW
+ * id.
+ */
+struct net_device *cxgb4_netdev_by_hwid(struct pci_dev *pdev, unsigned int id)
+{
+ const struct adapter *adap = pci_get_drvdata(pdev);
+
+ if (!adap || id >= NCHAN)
+ return NULL;
+ id = adap->chan_map[id];
+ return id < MAX_NPORTS ? adap->port[id] : NULL;
+}
+EXPORT_SYMBOL(cxgb4_netdev_by_hwid);
+
+void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
+ const unsigned int *pgsz_order)
+{
+ struct adapter *adap = netdev2adap(dev);
+
+ t4_write_reg(adap, ULP_RX_ISCSI_TAGMASK, tag_mask);
+ t4_write_reg(adap, ULP_RX_ISCSI_PSZ, HPZ0(pgsz_order[0]) |
+ HPZ1(pgsz_order[1]) | HPZ2(pgsz_order[2]) |
+ HPZ3(pgsz_order[3]));
+}
+EXPORT_SYMBOL(cxgb4_iscsi_init);
+
+static struct pci_driver cxgb4_driver;
+
+static void check_neigh_update(struct neighbour *neigh)
+{
+ const struct device *parent;
+ const struct net_device *netdev = neigh->dev;
+
+ if (netdev->priv_flags & IFF_802_1Q_VLAN)
+ netdev = vlan_dev_real_dev(netdev);
+ parent = netdev->dev.parent;
+ if (parent && parent->driver == &cxgb4_driver.driver)
+ t4_l2t_update(dev_get_drvdata(parent), neigh);
+}
+
+static int netevent_cb(struct notifier_block *nb, unsigned long event,
+ void *data)
+{
+ switch (event) {
+ case NETEVENT_NEIGH_UPDATE:
+ check_neigh_update(data);
+ break;
+ case NETEVENT_PMTU_UPDATE:
+ case NETEVENT_REDIRECT:
+ default:
+ break;
+ }
+ return 0;
+}
+
+static bool netevent_registered;
+static struct notifier_block cxgb4_netevent_nb = {
+ .notifier_call = netevent_cb
+};
+
+static void uld_attach(struct adapter *adap, unsigned int uld)
+{
+ void *handle;
+ struct cxgb4_lld_info lli;
+
+ lli.pdev = adap->pdev;
+ lli.l2t = adap->l2t;
+ lli.tids = &adap->tids;
+ lli.ports = adap->port;
+ lli.vr = &adap->vres;
+ lli.mtus = adap->params.mtus;
+ if (uld == CXGB4_ULD_RDMA) {
+ lli.rxq_ids = adap->sge.rdma_rxq;
+ lli.nrxq = adap->sge.rdmaqs;
+ } else if (uld == CXGB4_ULD_ISCSI) {
+ lli.rxq_ids = adap->sge.ofld_rxq;
+ lli.nrxq = adap->sge.ofldqsets;
+ }
+ lli.ntxq = adap->sge.ofldqsets;
+ lli.nchan = adap->params.nports;
+ lli.nports = adap->params.nports;
+ lli.wr_cred = adap->params.ofldq_wr_cred;
+ lli.adapter_type = CXGB4_ADAP_T4;
+ lli.udb_density = 1 << QUEUESPERPAGEPF0_GET(
+ t4_read_reg(adap, SGE_EGRESS_QUEUES_PER_PAGE_PF));
+ lli.ucq_density = 1 << QUEUESPERPAGEPF0_GET(
+ t4_read_reg(adap, SGE_INGRESS_QUEUES_PER_PAGE_PF));
+ lli.gts_reg = adap->regs + MYPF_REG(SGE_PF_GTS);
+ lli.db_reg = adap->regs + MYPF_REG(SGE_PF_KDOORBELL);
+ lli.fw_vers = adap->params.fw_vers;
+
+ handle = ulds[uld].add(&lli);
+ if (IS_ERR(handle)) {
+ dev_warn(adap->pdev_dev,
+ "could not attach to the %s driver, error %ld\n",
+ uld_str[uld], PTR_ERR(handle));
+ return;
+ }
+
+ adap->uld_handle[uld] = handle;
+
+ if (!netevent_registered) {
+ register_netevent_notifier(&cxgb4_netevent_nb);
+ netevent_registered = true;
+ }
+}
+
+static void attach_ulds(struct adapter *adap)
+{
+ unsigned int i;
+
+ mutex_lock(&uld_mutex);
+ list_add_tail(&adap->list_node, &adapter_list);
+ for (i = 0; i < CXGB4_ULD_MAX; i++)
+ if (ulds[i].add)
+ uld_attach(adap, i);
+ mutex_unlock(&uld_mutex);
+}
+
+static void detach_ulds(struct adapter *adap)
+{
+ unsigned int i;
+
+ mutex_lock(&uld_mutex);
+ list_del(&adap->list_node);
+ for (i = 0; i < CXGB4_ULD_MAX; i++)
+ if (adap->uld_handle[i]) {
+ ulds[i].state_change(adap->uld_handle[i],
+ CXGB4_STATE_DETACH);
+ adap->uld_handle[i] = NULL;
+ }
+ if (netevent_registered && list_empty(&adapter_list)) {
+ unregister_netevent_notifier(&cxgb4_netevent_nb);
+ netevent_registered = false;
+ }
+ mutex_unlock(&uld_mutex);
+}
+
+static void notify_ulds(struct adapter *adap, enum cxgb4_state new_state)
+{
+ unsigned int i;
+
+ mutex_lock(&uld_mutex);
+ for (i = 0; i < CXGB4_ULD_MAX; i++)
+ if (adap->uld_handle[i])
+ ulds[i].state_change(adap->uld_handle[i], new_state);
+ mutex_unlock(&uld_mutex);
+}
+
+/**
+ * cxgb4_register_uld - register an upper-layer driver
+ * @type: the ULD type
+ * @p: the ULD methods
+ *
+ * Registers an upper-layer driver with this driver and notifies the ULD
+ * about any presently available devices that support its type. Returns
+ * %-EBUSY if a ULD of the same type is already registered.
+ */
+int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p)
+{
+ int ret = 0;
+ struct adapter *adap;
+
+ if (type >= CXGB4_ULD_MAX)
+ return -EINVAL;
+ mutex_lock(&uld_mutex);
+ if (ulds[type].add) {
+ ret = -EBUSY;
+ goto out;
+ }
+ ulds[type] = *p;
+ list_for_each_entry(adap, &adapter_list, list_node)
+ uld_attach(adap, type);
+out: mutex_unlock(&uld_mutex);
+ return ret;
+}
+EXPORT_SYMBOL(cxgb4_register_uld);
+
+/**
+ * cxgb4_unregister_uld - unregister an upper-layer driver
+ * @type: the ULD type
+ *
+ * Unregisters an existing upper-layer driver.
+ */
+int cxgb4_unregister_uld(enum cxgb4_uld type)
+{
+ struct adapter *adap;
+
+ if (type >= CXGB4_ULD_MAX)
+ return -EINVAL;
+ mutex_lock(&uld_mutex);
+ list_for_each_entry(adap, &adapter_list, list_node)
+ adap->uld_handle[type] = NULL;
+ ulds[type].add = NULL;
+ mutex_unlock(&uld_mutex);
+ return 0;
+}
+EXPORT_SYMBOL(cxgb4_unregister_uld);
+
+/**
+ * cxgb_up - enable the adapter
+ * @adap: adapter being enabled
+ *
+ * Called when the first port is enabled, this function performs the
+ * actions necessary to make an adapter operational, such as completing
+ * the initialization of HW modules, and enabling interrupts.
+ *
+ * Must be called with the rtnl lock held.
+ */
+static int cxgb_up(struct adapter *adap)
+{
+ int err = 0;
+
+ if (!(adap->flags & FULL_INIT_DONE)) {
+ err = setup_sge_queues(adap);
+ if (err)
+ goto out;
+ err = setup_rss(adap);
+ if (err) {
+ t4_free_sge_resources(adap);
+ goto out;
+ }
+ if (adap->flags & USING_MSIX)
+ name_msix_vecs(adap);
+ adap->flags |= FULL_INIT_DONE;
+ }
+
+ if (adap->flags & USING_MSIX) {
+ err = request_irq(adap->msix_info[0].vec, t4_nondata_intr, 0,
+ adap->msix_info[0].desc, adap);
+ if (err)
+ goto irq_err;
+
+ err = request_msix_queue_irqs(adap);
+ if (err) {
+ free_irq(adap->msix_info[0].vec, adap);
+ goto irq_err;
+ }
+ } else {
+ err = request_irq(adap->pdev->irq, t4_intr_handler(adap),
+ (adap->flags & USING_MSI) ? 0 : IRQF_SHARED,
+ adap->name, adap);
+ if (err)
+ goto irq_err;
+ }
+ enable_rx(adap);
+ t4_sge_start(adap);
+ t4_intr_enable(adap);
+ notify_ulds(adap, CXGB4_STATE_UP);
+ out:
+ return err;
+ irq_err:
+ dev_err(adap->pdev_dev, "request_irq failed, err %d\n", err);
+ goto out;
+}
+
+static void cxgb_down(struct adapter *adapter)
+{
+ t4_intr_disable(adapter);
+ cancel_work_sync(&adapter->tid_release_task);
+
+ if (adapter->flags & USING_MSIX) {
+ free_msix_queue_irqs(adapter);
+ free_irq(adapter->msix_info[0].vec, adapter);
+ } else
+ free_irq(adapter->pdev->irq, adapter);
+ quiesce_rx(adapter);
+}
+
+/*
+ * net_device operations
+ */
+static int cxgb_open(struct net_device *dev)
+{
+ int err;
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adapter = pi->adapter;
+
+ if (!adapter->open_device_map && (err = cxgb_up(adapter)) < 0)
+ return err;
+
+ dev->real_num_tx_queues = pi->nqsets;
+ set_bit(pi->tx_chan, &adapter->open_device_map);
+ link_start(dev);
+ netif_tx_start_all_queues(dev);
+ return 0;
+}
+
+static int cxgb_close(struct net_device *dev)
+{
+ int ret;
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adapter = pi->adapter;
+
+ netif_tx_stop_all_queues(dev);
+ netif_carrier_off(dev);
+ ret = t4_enable_vi(adapter, 0, pi->viid, false, false);
+
+ clear_bit(pi->tx_chan, &adapter->open_device_map);
+
+ if (!adapter->open_device_map)
+ cxgb_down(adapter);
+ return 0;
+}
+
+static struct net_device_stats *cxgb_get_stats(struct net_device *dev)
+{
+ struct port_stats stats;
+ struct port_info *p = netdev_priv(dev);
+ struct adapter *adapter = p->adapter;
+ struct net_device_stats *ns = &dev->stats;
+
+ spin_lock(&adapter->stats_lock);
+ t4_get_port_stats(adapter, p->tx_chan, &stats);
+ spin_unlock(&adapter->stats_lock);
+
+ ns->tx_bytes = stats.tx_octets;
+ ns->tx_packets = stats.tx_frames;
+ ns->rx_bytes = stats.rx_octets;
+ ns->rx_packets = stats.rx_frames;
+ ns->multicast = stats.rx_mcast_frames;
+
+ /* detailed rx_errors */
+ ns->rx_length_errors = stats.rx_jabber + stats.rx_too_long +
+ stats.rx_runt;
+ ns->rx_over_errors = 0;
+ ns->rx_crc_errors = stats.rx_fcs_err;
+ ns->rx_frame_errors = stats.rx_symbol_err;
+ ns->rx_fifo_errors = stats.rx_ovflow0 + stats.rx_ovflow1 +
+ stats.rx_ovflow2 + stats.rx_ovflow3 +
+ stats.rx_trunc0 + stats.rx_trunc1 +
+ stats.rx_trunc2 + stats.rx_trunc3;
+ ns->rx_missed_errors = 0;
+
+ /* detailed tx_errors */
+ ns->tx_aborted_errors = 0;
+ ns->tx_carrier_errors = 0;
+ ns->tx_fifo_errors = 0;
+ ns->tx_heartbeat_errors = 0;
+ ns->tx_window_errors = 0;
+
+ ns->tx_errors = stats.tx_error_frames;
+ ns->rx_errors = stats.rx_symbol_err + stats.rx_fcs_err +
+ ns->rx_length_errors + stats.rx_len_err + ns->rx_fifo_errors;
+ return ns;
+}
+
+static int cxgb_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+ int ret = 0, prtad, devad;
+ struct port_info *pi = netdev_priv(dev);
+ struct mii_ioctl_data *data = (struct mii_ioctl_data *)&req->ifr_data;
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ if (pi->mdio_addr < 0)
+ return -EOPNOTSUPP;
+ data->phy_id = pi->mdio_addr;
+ break;
+ case SIOCGMIIREG:
+ case SIOCSMIIREG:
+ if (mdio_phy_id_is_c45(data->phy_id)) {
+ prtad = mdio_phy_id_prtad(data->phy_id);
+ devad = mdio_phy_id_devad(data->phy_id);
+ } else if (data->phy_id < 32) {
+ prtad = data->phy_id;
+ devad = 0;
+ data->reg_num &= 0x1f;
+ } else
+ return -EINVAL;
+
+ if (cmd == SIOCGMIIREG)
+ ret = t4_mdio_rd(pi->adapter, 0, prtad, devad,
+ data->reg_num, &data->val_out);
+ else
+ ret = t4_mdio_wr(pi->adapter, 0, prtad, devad,
+ data->reg_num, data->val_in);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ return ret;
+}
+
+static void cxgb_set_rxmode(struct net_device *dev)
+{
+ /* unfortunately we can't return errors to the stack */
+ set_rxmode(dev, -1, false);
+}
+
+static int cxgb_change_mtu(struct net_device *dev, int new_mtu)
+{
+ int ret;
+ struct port_info *pi = netdev_priv(dev);
+
+ if (new_mtu < 81 || new_mtu > MAX_MTU) /* accommodate SACK */
+ return -EINVAL;
+ ret = t4_set_rxmode(pi->adapter, 0, pi->viid, new_mtu, -1, -1, -1,
+ true);
+ if (!ret)
+ dev->mtu = new_mtu;
+ return ret;
+}
+
+static int cxgb_set_mac_addr(struct net_device *dev, void *p)
+{
+ int ret;
+ struct sockaddr *addr = p;
+ struct port_info *pi = netdev_priv(dev);
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EINVAL;
+
+ ret = t4_change_mac(pi->adapter, 0, pi->viid, pi->xact_addr_filt,
+ addr->sa_data, true);
+ if (ret < 0)
+ return ret;
+
+ memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+ pi->xact_addr_filt = ret;
+ return 0;
+}
+
+static void vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
+{
+ struct port_info *pi = netdev_priv(dev);
+
+ pi->vlan_grp = grp;
+ t4_set_vlan_accel(pi->adapter, 1 << pi->tx_chan, grp != NULL);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void cxgb_netpoll(struct net_device *dev)
+{
+ int i;
+ struct port_info *pi = netdev_priv(dev);
+ struct adapter *adap = pi->adapter;
+ struct sge_eth_rxq *rx = &adap->sge.ethrxq[pi->first_qset];
+
+ for (i = 0; i < pi->nqsets; i++, rx++)
+ t4_intr_handler(adap)((adap->flags & USING_MSIX) ? &rx->rspq :
+ adap);
+}
+#endif
+
+static const struct net_device_ops cxgb4_netdev_ops = {
+ .ndo_open = cxgb_open,
+ .ndo_stop = cxgb_close,
+ .ndo_start_xmit = t4_eth_xmit,
+ .ndo_get_stats = cxgb_get_stats,
+ .ndo_set_rx_mode = cxgb_set_rxmode,
+ .ndo_set_mac_address = cxgb_set_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = cxgb_ioctl,
+ .ndo_change_mtu = cxgb_change_mtu,
+ .ndo_vlan_rx_register = vlan_rx_register,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = cxgb_netpoll,
+#endif
+};
+
+void t4_fatal_err(struct adapter *adap)
+{
+ t4_set_reg_field(adap, SGE_CONTROL, GLOBALENABLE, 0);
+ dev_alert(adap->pdev_dev, "encountered fatal error, adapter stopped\n");
+}
+
+static void setup_memwin(struct adapter *adap)
+{
+ u32 bar0;
+
+ bar0 = pci_resource_start(adap->pdev, 0); /* truncation intentional */
+ t4_write_reg(adap, PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN, 0),
+ (bar0 + MEMWIN0_BASE) | BIR(0) |
+ WINDOW(ilog2(MEMWIN0_APERTURE) - 10));
+ t4_write_reg(adap, PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN, 1),
+ (bar0 + MEMWIN1_BASE) | BIR(0) |
+ WINDOW(ilog2(MEMWIN1_APERTURE) - 10));
+ t4_write_reg(adap, PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN, 2),
+ (bar0 + MEMWIN2_BASE) | BIR(0) |
+ WINDOW(ilog2(MEMWIN2_APERTURE) - 10));
+}
+
+/*
+ * Max # of ATIDs. The absolute HW max is 16K but we keep it lower.
+ */
+#define MAX_ATIDS 8192U
+
+/*
+ * Phase 0 of initialization: contact FW, obtain config, perform basic init.
+ */
+static int adap_init0(struct adapter *adap)
+{
+ int ret;
+ u32 v, port_vec;
+ enum dev_state state;
+ u32 params[7], val[7];
+ struct fw_caps_config_cmd c;
+
+ ret = t4_check_fw_version(adap);
+ if (ret == -EINVAL || ret > 0) {
+ if (upgrade_fw(adap) >= 0) /* recache FW version */
+ ret = t4_check_fw_version(adap);
+ }
+ if (ret < 0)
+ return ret;
+
+ /* contact FW, request master */
+ ret = t4_fw_hello(adap, 0, 0, MASTER_MUST, &state);
+ if (ret < 0) {
+ dev_err(adap->pdev_dev, "could not connect to FW, error %d\n",
+ ret);
+ return ret;
+ }
+
+ /* reset device */
+ ret = t4_fw_reset(adap, 0, PIORSTMODE | PIORST);
+ if (ret < 0)
+ goto bye;
+
+ /* get device capabilities */
+ memset(&c, 0, sizeof(c));
+ c.op_to_write = htonl(FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
+ FW_CMD_REQUEST | FW_CMD_READ);
+ c.retval_len16 = htonl(FW_LEN16(c));
+ ret = t4_wr_mbox(adap, 0, &c, sizeof(c), &c);
+ if (ret < 0)
+ goto bye;
+
+ /* select capabilities we'll be using */
+ if (c.niccaps & htons(FW_CAPS_CONFIG_NIC_VM)) {
+ if (!vf_acls)
+ c.niccaps ^= htons(FW_CAPS_CONFIG_NIC_VM);
+ else
+ c.niccaps = htons(FW_CAPS_CONFIG_NIC_VM);
+ } else if (vf_acls) {
+ dev_err(adap->pdev_dev, "virtualization ACLs not supported");
+ goto bye;
+ }
+ c.op_to_write = htonl(FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
+ FW_CMD_REQUEST | FW_CMD_WRITE);
+ ret = t4_wr_mbox(adap, 0, &c, sizeof(c), NULL);
+ if (ret < 0)
+ goto bye;
+
+ ret = t4_config_glbl_rss(adap, 0,
+ FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL,
+ FW_RSS_GLB_CONFIG_CMD_TNLMAPEN |
+ FW_RSS_GLB_CONFIG_CMD_TNLALLLKP);
+ if (ret < 0)
+ goto bye;
+
+ ret = t4_cfg_pfvf(adap, 0, 0, 0, 64, 64, 64, 0, 0, 4, 0xf, 0xf, 16,
+ FW_CMD_CAP_PF, FW_CMD_CAP_PF);
+ if (ret < 0)
+ goto bye;
+
+ for (v = 0; v < SGE_NTIMERS - 1; v++)
+ adap->sge.timer_val[v] = min(intr_holdoff[v], MAX_SGE_TIMERVAL);
+ adap->sge.timer_val[SGE_NTIMERS - 1] = MAX_SGE_TIMERVAL;
+ adap->sge.counter_val[0] = 1;
+ for (v = 1; v < SGE_NCOUNTERS; v++)
+ adap->sge.counter_val[v] = min(intr_cnt[v - 1],
+ THRESHOLD_3_MASK);
+ t4_sge_init(adap);
+
+ /* get basic stuff going */
+ ret = t4_early_init(adap, 0);
+ if (ret < 0)
+ goto bye;
+
+#define FW_PARAM_DEV(param) \
+ (FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) | \
+ FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_##param))
+
+#define FW_PARAM_PFVF(param) \
+ (FW_PARAMS_MNEM(FW_PARAMS_MNEM_PFVF) | \
+ FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_PFVF_##param))
+
+ params[0] = FW_PARAM_DEV(PORTVEC);
+ params[1] = FW_PARAM_PFVF(L2T_START);
+ params[2] = FW_PARAM_PFVF(L2T_END);
+ params[3] = FW_PARAM_PFVF(FILTER_START);
+ params[4] = FW_PARAM_PFVF(FILTER_END);
+ ret = t4_query_params(adap, 0, 5, params, val);
+ if (ret < 0)
+ goto bye;
+ port_vec = val[0];
+ adap->tids.ftid_base = val[3];
+ adap->tids.nftids = val[4] - val[3] + 1;
+
+ if (c.ofldcaps) {
+ /* query offload-related parameters */
+ params[0] = FW_PARAM_DEV(NTID);
+ params[1] = FW_PARAM_PFVF(SERVER_START);
+ params[2] = FW_PARAM_PFVF(SERVER_END);
+ params[3] = FW_PARAM_PFVF(TDDP_START);
+ params[4] = FW_PARAM_PFVF(TDDP_END);
+ params[5] = FW_PARAM_DEV(FLOWC_BUFFIFO_SZ);
+ ret = t4_query_params(adap, 0, 6, params, val);
+ if (ret < 0)
+ goto bye;
+ adap->tids.ntids = val[0];
+ adap->tids.natids = min(adap->tids.ntids / 2, MAX_ATIDS);
+ adap->tids.stid_base = val[1];
+ adap->tids.nstids = val[2] - val[1] + 1;
+ adap->vres.ddp.start = val[3];
+ adap->vres.ddp.size = val[4] - val[3] + 1;
+ adap->params.ofldq_wr_cred = val[5];
+ adap->params.offload = 1;
+ }
+ if (c.rdmacaps) {
+ params[0] = FW_PARAM_PFVF(STAG_START);
+ params[1] = FW_PARAM_PFVF(STAG_END);
+ params[2] = FW_PARAM_PFVF(RQ_START);
+ params[3] = FW_PARAM_PFVF(RQ_END);
+ params[4] = FW_PARAM_PFVF(PBL_START);
+ params[5] = FW_PARAM_PFVF(PBL_END);
+ ret = t4_query_params(adap, 0, 6, params, val);
+ if (ret < 0)
+ goto bye;
+ adap->vres.stag.start = val[0];
+ adap->vres.stag.size = val[1] - val[0] + 1;
+ adap->vres.rq.start = val[2];
+ adap->vres.rq.size = val[3] - val[2] + 1;
+ adap->vres.pbl.start = val[4];
+ adap->vres.pbl.size = val[5] - val[4] + 1;
+ }
+ if (c.iscsicaps) {
+ params[0] = FW_PARAM_PFVF(ISCSI_START);
+ params[1] = FW_PARAM_PFVF(ISCSI_END);
+ ret = t4_query_params(adap, 0, 2, params, val);
+ if (ret < 0)
+ goto bye;
+ adap->vres.iscsi.start = val[0];
+ adap->vres.iscsi.size = val[1] - val[0] + 1;
+ }
+#undef FW_PARAM_PFVF
+#undef FW_PARAM_DEV
+
+ adap->params.nports = hweight32(port_vec);
+ adap->params.portvec = port_vec;
+ adap->flags |= FW_OK;
+
+ /* These are finalized by FW initialization, load their values now */
+ v = t4_read_reg(adap, TP_TIMER_RESOLUTION);
+ adap->params.tp.tre = TIMERRESOLUTION_GET(v);
+ t4_read_mtu_tbl(adap, adap->params.mtus, NULL);
+ t4_load_mtus(adap, adap->params.mtus, adap->params.a_wnd,
+ adap->params.b_wnd);
+
+ /* tweak some settings */
+ t4_write_reg(adap, TP_SHIFT_CNT, 0x64f8849);
+ t4_write_reg(adap, ULP_RX_TDDP_PSZ, HPZ0(PAGE_SHIFT - 12));
+ t4_write_reg(adap, TP_PIO_ADDR, TP_INGRESS_CONFIG);
+ v = t4_read_reg(adap, TP_PIO_DATA);
+ t4_write_reg(adap, TP_PIO_DATA, v & ~CSUM_HAS_PSEUDO_HDR);
+ setup_memwin(adap);
+ return 0;
+
+ /*
+ * If a command timed out or failed with EIO FW does not operate within
+ * its spec or something catastrophic happened to HW/FW, stop issuing
+ * commands.
+ */
+bye: if (ret != -ETIMEDOUT && ret != -EIO)
+ t4_fw_bye(adap, 0);
+ return ret;
+}
+
+static inline bool is_10g_port(const struct link_config *lc)
+{
+ return (lc->supported & FW_PORT_CAP_SPEED_10G) != 0;
+}
+
+static inline void init_rspq(struct sge_rspq *q, u8 timer_idx, u8 pkt_cnt_idx,
+ unsigned int size, unsigned int iqe_size)
+{
+ q->intr_params = QINTR_TIMER_IDX(timer_idx) |
+ (pkt_cnt_idx < SGE_NCOUNTERS ? QINTR_CNT_EN : 0);
+ q->pktcnt_idx = pkt_cnt_idx < SGE_NCOUNTERS ? pkt_cnt_idx : 0;
+ q->iqe_len = iqe_size;
+ q->size = size;
+}
+
+/*
+ * Perform default configuration of DMA queues depending on the number and type
+ * of ports we found and the number of available CPUs. Most settings can be
+ * modified by the admin prior to actual use.
+ */
+static void __devinit cfg_queues(struct adapter *adap)
+{
+ struct sge *s = &adap->sge;
+ int i, q10g = 0, n10g = 0, qidx = 0;
+
+ for_each_port(adap, i)
+ n10g += is_10g_port(&adap2pinfo(adap, i)->link_cfg);
+
+ /*
+ * We default to 1 queue per non-10G port and up to # of cores queues
+ * per 10G port.
+ */
+ if (n10g)
+ q10g = (MAX_ETH_QSETS - (adap->params.nports - n10g)) / n10g;
+ if (q10g > num_online_cpus())
+ q10g = num_online_cpus();
+
+ for_each_port(adap, i) {
+ struct port_info *pi = adap2pinfo(adap, i);
+
+ pi->first_qset = qidx;
+ pi->nqsets = is_10g_port(&pi->link_cfg) ? q10g : 1;
+ qidx += pi->nqsets;
+ }
+
+ s->ethqsets = qidx;
+ s->max_ethqsets = qidx; /* MSI-X may lower it later */
+
+ if (is_offload(adap)) {
+ /*
+ * For offload we use 1 queue/channel if all ports are up to 1G,
+ * otherwise we divide all available queues amongst the channels
+ * capped by the number of available cores.
+ */
+ if (n10g) {
+ i = min_t(int, ARRAY_SIZE(s->ofldrxq),
+ num_online_cpus());
+ s->ofldqsets = roundup(i, adap->params.nports);
+ } else
+ s->ofldqsets = adap->params.nports;
+ /* For RDMA one Rx queue per channel suffices */
+ s->rdmaqs = adap->params.nports;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(s->ethrxq); i++) {
+ struct sge_eth_rxq *r = &s->ethrxq[i];
+
+ init_rspq(&r->rspq, 0, 0, 1024, 64);
+ r->fl.size = 72;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(s->ethtxq); i++)
+ s->ethtxq[i].q.size = 1024;
+
+ for (i = 0; i < ARRAY_SIZE(s->ctrlq); i++)
+ s->ctrlq[i].q.size = 512;
+
+ for (i = 0; i < ARRAY_SIZE(s->ofldtxq); i++)
+ s->ofldtxq[i].q.size = 1024;
+
+ for (i = 0; i < ARRAY_SIZE(s->ofldrxq); i++) {
+ struct sge_ofld_rxq *r = &s->ofldrxq[i];
+
+ init_rspq(&r->rspq, 0, 0, 1024, 64);
+ r->rspq.uld = CXGB4_ULD_ISCSI;
+ r->fl.size = 72;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(s->rdmarxq); i++) {
+ struct sge_ofld_rxq *r = &s->rdmarxq[i];
+
+ init_rspq(&r->rspq, 0, 0, 511, 64);
+ r->rspq.uld = CXGB4_ULD_RDMA;
+ r->fl.size = 72;
+ }
+
+ init_rspq(&s->fw_evtq, 6, 0, 512, 64);
+ init_rspq(&s->intrq, 6, 0, 2 * MAX_INGQ, 64);
+}
+
+/*
+ * Reduce the number of Ethernet queues across all ports to at most n.
+ * n provides at least one queue per port.
+ */
+static void __devinit reduce_ethqs(struct adapter *adap, int n)
+{
+ int i;
+ struct port_info *pi;
+
+ while (n < adap->sge.ethqsets)
+ for_each_port(adap, i) {
+ pi = adap2pinfo(adap, i);
+ if (pi->nqsets > 1) {
+ pi->nqsets--;
+ adap->sge.ethqsets--;
+ if (adap->sge.ethqsets <= n)
+ break;
+ }
+ }
+
+ n = 0;
+ for_each_port(adap, i) {
+ pi = adap2pinfo(adap, i);
+ pi->first_qset = n;
+ n += pi->nqsets;
+ }
+}
+
+/* 2 MSI-X vectors needed for the FW queue and non-data interrupts */
+#define EXTRA_VECS 2
+
+static int __devinit enable_msix(struct adapter *adap)
+{
+ int ofld_need = 0;
+ int i, err, want, need;
+ struct sge *s = &adap->sge;
+ unsigned int nchan = adap->params.nports;
+ struct msix_entry entries[MAX_INGQ + 1];
+
+ for (i = 0; i < ARRAY_SIZE(entries); ++i)
+ entries[i].entry = i;
+
+ want = s->max_ethqsets + EXTRA_VECS;
+ if (is_offload(adap)) {
+ want += s->rdmaqs + s->ofldqsets;
+ /* need nchan for each possible ULD */
+ ofld_need = 2 * nchan;
+ }
+ need = adap->params.nports + EXTRA_VECS + ofld_need;
+
+ while ((err = pci_enable_msix(adap->pdev, entries, want)) >= need)
+ want = err;
+
+ if (!err) {
+ /*
+ * Distribute available vectors to the various queue groups.
+ * Every group gets its minimum requirement and NIC gets top
+ * priority for leftovers.
+ */
+ i = want - EXTRA_VECS - ofld_need;
+ if (i < s->max_ethqsets) {
+ s->max_ethqsets = i;
+ if (i < s->ethqsets)
+ reduce_ethqs(adap, i);
+ }
+ if (is_offload(adap)) {
+ i = want - EXTRA_VECS - s->max_ethqsets;
+ i -= ofld_need - nchan;
+ s->ofldqsets = (i / nchan) * nchan; /* round down */
+ }
+ for (i = 0; i < want; ++i)
+ adap->msix_info[i].vec = entries[i].vector;
+ } else if (err > 0)
+ dev_info(adap->pdev_dev,
+ "only %d MSI-X vectors left, not using MSI-X\n", err);
+ return err;
+}
+
+#undef EXTRA_VECS
+
+static void __devinit print_port_info(struct adapter *adap)
+{
+ static const char *base[] = {
+ "R", "KX4", "T", "KX", "T", "KR", "CX4"
+ };
+
+ int i;
+ char buf[80];
+
+ for_each_port(adap, i) {
+ struct net_device *dev = adap->port[i];
+ const struct port_info *pi = netdev_priv(dev);
+ char *bufp = buf;
+
+ if (!test_bit(i, &adap->registered_device_map))
+ continue;
+
+ if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_100M)
+ bufp += sprintf(bufp, "100/");
+ if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_1G)
+ bufp += sprintf(bufp, "1000/");
+ if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_10G)
+ bufp += sprintf(bufp, "10G/");
+ if (bufp != buf)
+ --bufp;
+ sprintf(bufp, "BASE-%s", base[pi->port_type]);
+
+ netdev_info(dev, "Chelsio %s rev %d %s %sNIC PCIe x%d%s\n",
+ adap->params.vpd.id, adap->params.rev,
+ buf, is_offload(adap) ? "R" : "",
+ adap->params.pci.width,
+ (adap->flags & USING_MSIX) ? " MSI-X" :
+ (adap->flags & USING_MSI) ? " MSI" : "");
+ if (adap->name == dev->name)
+ netdev_info(dev, "S/N: %s, E/C: %s\n",
+ adap->params.vpd.sn, adap->params.vpd.ec);
+ }
+}
+
+#define VLAN_FEAT (NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |\
+ NETIF_F_IPV6_CSUM | NETIF_F_HIGHDMA)
+
+static int __devinit init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int func, i, err;
+ struct port_info *pi;
+ unsigned int highdma = 0;
+ struct adapter *adapter = NULL;
+
+ printk_once(KERN_INFO "%s - version %s\n", DRV_DESC, DRV_VERSION);
+
+ err = pci_request_regions(pdev, KBUILD_MODNAME);
+ if (err) {
+ /* Just info, some other driver may have claimed the device. */
+ dev_info(&pdev->dev, "cannot obtain PCI resources\n");
+ return err;
+ }
+
+ /* We control everything through PF 0 */
+ func = PCI_FUNC(pdev->devfn);
+ if (func > 0)
+ goto sriov;
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "cannot enable PCI device\n");
+ goto out_release_regions;
+ }
+
+ if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
+ highdma = NETIF_F_HIGHDMA;
+ err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (err) {
+ dev_err(&pdev->dev, "unable to obtain 64-bit DMA for "
+ "coherent allocations\n");
+ goto out_disable_device;
+ }
+ } else {
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (err) {
+ dev_err(&pdev->dev, "no usable DMA configuration\n");
+ goto out_disable_device;
+ }
+ }
+
+ pci_enable_pcie_error_reporting(pdev);
+ pci_set_master(pdev);
+ pci_save_state(pdev);
+
+ adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
+ if (!adapter) {
+ err = -ENOMEM;
+ goto out_disable_device;
+ }
+
+ adapter->regs = pci_ioremap_bar(pdev, 0);
+ if (!adapter->regs) {
+ dev_err(&pdev->dev, "cannot map device registers\n");
+ err = -ENOMEM;
+ goto out_free_adapter;
+ }
+
+ adapter->pdev = pdev;
+ adapter->pdev_dev = &pdev->dev;
+ adapter->name = pci_name(pdev);
+ adapter->msg_enable = dflt_msg_enable;
+ memset(adapter->chan_map, 0xff, sizeof(adapter->chan_map));
+
+ spin_lock_init(&adapter->stats_lock);
+ spin_lock_init(&adapter->tid_release_lock);
+
+ INIT_WORK(&adapter->tid_release_task, process_tid_release_list);
+
+ err = t4_prep_adapter(adapter);
+ if (err)
+ goto out_unmap_bar;
+ err = adap_init0(adapter);
+ if (err)
+ goto out_unmap_bar;
+
+ for_each_port(adapter, i) {
+ struct net_device *netdev;
+
+ netdev = alloc_etherdev_mq(sizeof(struct port_info),
+ MAX_ETH_QSETS);
+ if (!netdev) {
+ err = -ENOMEM;
+ goto out_free_dev;
+ }
+
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+
+ adapter->port[i] = netdev;
+ pi = netdev_priv(netdev);
+ pi->adapter = adapter;
+ pi->xact_addr_filt = -1;
+ pi->rx_offload = RX_CSO;
+ pi->port_id = i;
+ netif_carrier_off(netdev);
+ netif_tx_stop_all_queues(netdev);
+ netdev->irq = pdev->irq;
+
+ netdev->features |= NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6;
+ netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
+ netdev->features |= NETIF_F_GRO | highdma;
+ netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
+ netdev->vlan_features = netdev->features & VLAN_FEAT;
+
+ netdev->netdev_ops = &cxgb4_netdev_ops;
+ SET_ETHTOOL_OPS(netdev, &cxgb_ethtool_ops);
+ }
+
+ pci_set_drvdata(pdev, adapter);
+
+ if (adapter->flags & FW_OK) {
+ err = t4_port_init(adapter, 0, 0, 0);
+ if (err)
+ goto out_free_dev;
+ }
+
+ /*
+ * Configure queues and allocate tables now, they can be needed as
+ * soon as the first register_netdev completes.
+ */
+ cfg_queues(adapter);
+
+ adapter->l2t = t4_init_l2t();
+ if (!adapter->l2t) {
+ /* We tolerate a lack of L2T, giving up some functionality */
+ dev_warn(&pdev->dev, "could not allocate L2T, continuing\n");
+ adapter->params.offload = 0;
+ }
+
+ if (is_offload(adapter) && tid_init(&adapter->tids) < 0) {
+ dev_warn(&pdev->dev, "could not allocate TID table, "
+ "continuing\n");
+ adapter->params.offload = 0;
+ }
+
+ /*
+ * The card is now ready to go. If any errors occur during device
+ * registration we do not fail the whole card but rather proceed only
+ * with the ports we manage to register successfully. However we must
+ * register at least one net device.
+ */
+ for_each_port(adapter, i) {
+ err = register_netdev(adapter->port[i]);
+ if (err)
+ dev_warn(&pdev->dev,
+ "cannot register net device %s, skipping\n",
+ adapter->port[i]->name);
+ else {
+ /*
+ * Change the name we use for messages to the name of
+ * the first successfully registered interface.
+ */
+ if (!adapter->registered_device_map)
+ adapter->name = adapter->port[i]->name;
+
+ __set_bit(i, &adapter->registered_device_map);
+ adapter->chan_map[adap2pinfo(adapter, i)->tx_chan] = i;
+ }
+ }
+ if (!adapter->registered_device_map) {
+ dev_err(&pdev->dev, "could not register any net devices\n");
+ goto out_free_dev;
+ }
+
+ if (cxgb4_proc_root) {
+ adapter->proc_root = proc_mkdir(pci_name(pdev),
+ cxgb4_proc_root);
+ if (!adapter->proc_root)
+ dev_warn(&pdev->dev,
+ "could not create /proc directory");
+ else
+ setup_proc(adapter, adapter->proc_root);
+ }
+
+ if (cxgb4_debugfs_root) {
+ adapter->debugfs_root = debugfs_create_dir(pci_name(pdev),
+ cxgb4_debugfs_root);
+ setup_debugfs(adapter);
+ }
+
+ /* See what interrupts we'll be using */
+ if (msi > 1 && enable_msix(adapter) == 0)
+ adapter->flags |= USING_MSIX;
+ else if (msi > 0 && pci_enable_msi(pdev) == 0)
+ adapter->flags |= USING_MSI;
+
+ if (is_offload(adapter))
+ attach_ulds(adapter);
+
+ print_port_info(adapter);
+
+sriov:
+#ifdef CONFIG_PCI_IOV
+ if (func < ARRAY_SIZE(num_vf) && num_vf[func] > 0)
+ if (pci_enable_sriov(pdev, num_vf[func]) == 0)
+ dev_info(&pdev->dev,
+ "instantiated %u virtual functions\n",
+ num_vf[func]);
+#endif
+ return 0;
+
+ out_free_dev:
+ t4_free_mem(adapter->tids.tid_tab);
+ t4_free_mem(adapter->l2t);
+ for_each_port(adapter, i)
+ if (adapter->port[i])
+ free_netdev(adapter->port[i]);
+ if (adapter->flags & FW_OK)
+ t4_fw_bye(adapter, 0);
+ out_unmap_bar:
+ iounmap(adapter->regs);
+ out_free_adapter:
+ kfree(adapter);
+ out_disable_device:
+ pci_disable_pcie_error_reporting(pdev);
+ pci_disable_device(pdev);
+ out_release_regions:
+ pci_release_regions(pdev);
+ pci_set_drvdata(pdev, NULL);
+ return err;
+}
+
+static void __devexit remove_one(struct pci_dev *pdev)
+{
+ struct adapter *adapter = pci_get_drvdata(pdev);
+
+ pci_disable_sriov(pdev);
+
+ if (adapter) {
+ int i;
+
+ if (is_offload(adapter))
+ detach_ulds(adapter);
+
+ t4_sge_stop(adapter);
+
+ for_each_port(adapter, i)
+ if (test_bit(i, &adapter->registered_device_map))
+ unregister_netdev(adapter->port[i]);
+
+ if (adapter->proc_root) {
+ cleanup_proc(adapter->proc_root);
+ remove_proc_entry(pci_name(pdev), cxgb4_proc_root);
+ }
+
+ if (adapter->debugfs_root)
+ debugfs_remove_recursive(adapter->debugfs_root);
+
+ t4_free_sge_resources(adapter);
+ t4_free_mem(adapter->l2t);
+ t4_free_mem(adapter->tids.tid_tab);
+ disable_msi(adapter);
+
+ for_each_port(adapter, i)
+ if (adapter->port[i])
+ free_netdev(adapter->port[i]);
+
+ if (adapter->flags & FW_OK)
+ t4_fw_bye(adapter, 0);
+ iounmap(adapter->regs);
+ kfree(adapter);
+ pci_disable_pcie_error_reporting(pdev);
+ pci_disable_device(pdev);
+ pci_release_regions(pdev);
+ pci_set_drvdata(pdev, NULL);
+ } else if (PCI_FUNC(pdev->devfn) > 0)
+ pci_release_regions(pdev);
+}
+
+static struct pci_driver cxgb4_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = cxgb4_pci_tbl,
+ .probe = init_one,
+ .remove = __devexit_p(remove_one),
+};
+
+#define DRV_PROC_NAME "driver/" KBUILD_MODNAME
+
+static int __init cxgb4_init_module(void)
+{
+ int ret;
+
+ /* Debugfs support is optional, just warn if this fails */
+ cxgb4_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ if (!cxgb4_debugfs_root)
+ pr_warning("could not create debugfs entry, continuing\n");
+
+#ifdef CONFIG_PROC_FS
+ cxgb4_proc_root = proc_mkdir(DRV_PROC_NAME, NULL);
+ if (!cxgb4_proc_root)
+ pr_warning("could not create /proc driver directory, "
+ "continuing\n");
+#endif
+
+ ret = pci_register_driver(&cxgb4_driver);
+ if (ret < 0) {
+ remove_proc_entry(DRV_PROC_NAME, NULL);
+ debugfs_remove(cxgb4_debugfs_root);
+ }
+ return ret;
+}
+
+static void __exit cxgb4_cleanup_module(void)
+{
+ pci_unregister_driver(&cxgb4_driver);
+ remove_proc_entry(DRV_PROC_NAME, NULL);
+ debugfs_remove(cxgb4_debugfs_root); /* NULL ok */
+}
+
+module_init(cxgb4_init_module);
+module_exit(cxgb4_cleanup_module);
--
1.5.4
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