* [RFR] gianfar ethernet driver
[not found] <8F52CF1D-C916-11D8-BB6A-000393DBC2E8@freescale.com>
@ 2004-07-05 17:28 ` Jeff Garzik
2004-07-06 2:38 ` jamal
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Jeff Garzik @ 2004-07-05 17:28 UTC (permalink / raw)
To: Kumar Gala, Netdev; +Cc: David Woodhouse, jamal
[-- Attachment #1: Type: text/plain, Size: 5814 bytes --]
(CC to netdev added)
Kumar,
I've merged the gianfar driver into my netdev-2.6 queue. This will get
it automatically propagated into the -mm tree, and once some of these
comments are resolved/discussed, pushed upstream as well.
Follow-up patches should be incremental to this (your) patch.
Others,
I've attached the patch as Kumar submitted it. Please review.
Comments:
1) Share the knowledge. Please CC comments (and criticisms!) to netdev.
2) I'm strongly pondering vetoing try_fastroute() code in this driver.
Surely this should be in core net stack code... if it isn't already? Jamal?
3) delete this
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,41)
+#define irqreturn_t void
+#define IRQ_HANDLED
+#endif
4) static? const?
+#define DEVICE_NAME "%s: Gianfar Ethernet Controller Version 1.0, "
+char gfar_driver_name[] = "Gianfar Ethernet";
+char gfar_driver_version[] = "1.0";
5) Probably want to define DRV_NAME like the other drivers do. It's
used in data bus, i/o region reservation, and ethtool ioctls at least.
6) sysfs support: call SET_NETDEV_DEV()
7) ethtool_ops should not be kmalloc'd.
+ dev_ethtool_ops =
+ (struct ethtool_ops *)kmalloc(sizeof(struct ethtool_ops),
+ GFP_KERNEL);
8) I recommend enabling _both_ hardware interrupt coalescing and NAPI,
at the same time. Several other Linux net drivers need to be changed to
do this, as well
9) in startup_gfar() you kmalloc() then dma-map the descriptors. don't
bother -- just alloc consistent/coherent DMA memory.
10) recommend assigning a constant for your phy timer interval
+ init_timer(&priv->phy_info_timer);
+ priv->phy_info_timer.function = &gfar_phy_timer;
+ priv->phy_info_timer.data = (unsigned long) dev;
+ mod_timer(&priv->phy_info_timer, jiffies + 2 * HZ);
rather than open-coding it.
11) this is ugly. do the casting on the other end, in the work function:
+ /* Set up the bottom half queue */
+ INIT_WORK(&priv->tq, (void (*)(void *))gfar_phy_change, dev);
12) the above "bottom half" comment, or the code's intent, is incorrect.
bottom halves more closely map to tasklet. however, slow-path phy
manipulation certainly lends itself to process context workqueues.
13) use of a wait queue rxcleanupq is fairly questionable.
14) surely gfar_set_mac_address() needs some sort of synchronization?
15) gfar_change_mtu() synchronization appears absent?
16) in gfar_timeout(), proper behavior is to call netif_wake_queue()
unconditionally, if you are assured that your stop/startup_gfar()
cleared the TX queue (including dropping any pending skbs).
17) some drivers choose to simply schedule_work() when dev->tx_timeout()
is fired, to move the error handling/reset tasks to process context.
18) As Jamal recently noted, no need to test netif_queue_stopped()
19) I think your gfar_poll() needs spin_lock_irqsave(), not spin_lock().
20) You should ALWAYS have a work limit, NAPI or no. Otherwise under
heavy load the non-NAPI driver will be doing nothing but sitting
(shitting?) in your driver's interrupt handler.
+#ifdef CONFIG_GFAR_NAPI
+#define GFAR_RXDONE() ((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))
+#else
+#define GFAR_RXDONE() (bdp->status & RXBD_EMPTY)
+#endif
21) a la #12, buggy comment:
+ /* Schedule the bottom half */
+ schedule_work(&priv->tq);
22) use msleep()
+ /* Delay to give the PHY a chance to change the
+ * register state */
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(timeout);
23) gfar_set_multi() does not appear to take into account huge
multi-cast lists. Drivers usually handle large dev->mc_count by falling
back to ALLMULTI behavior.
24) setting IFF_MULTICAST is suspicious at best, possibly wrong:
+ dev->mtu = 1500;
+ dev->set_multicast_list = gfar_set_multi;
+ dev->flags |= IFF_MULTICAST;
+
25) kill this
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,41)
+#include <linux/workqueue.h>
+#else
+#include <linux/tqueue.h>
+#define work_struct tq_struct
+#define schedule_work schedule_task
+#endif
26) stat_gstrings[] are _not_ human-readable strings, but easily
machine-parseable keys. For example,
"tx&rx 1024-1518B frames"
should be
"tx-rx-1024-1518-frames"
or somesuch. Kill spaces, punctuation, capital letters, etc. Make it
look more like a C identifier.
27) as mentioned in #4/#5, the following is incorrect. The driver name
is not an advertisement, it is the short Unix name associated with this
driver.
+void gfar_gdrvinfo(struct net_device *dev, struct
+ ethtool_drvinfo *drvinfo)
+{
+ strncpy(drvinfo->driver, gfar_driver_name, GFAR_INFOSTR_LEN);
+ strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
28) I see you support register dump (good!), now please send the
register-pretty-print patch to the ethtool package :)
29) kill gfar_get_link(). you use netif_carrier_{on,off} (good!), so
you should use the default ethtool_op_get_link()
30) use include/linux/mii.h where possible. Add GMII-related defines if
necessary.
31) infinite loops, particularly on 1-bits, are discouraged:
+ /* Wait for the transaction to finish */
+ while (gfar_read(®base->miimind) & (MIIMIND_NOTVALID |
MIIMIND_BUSY))
+ cpu_relax();
32) gianfar_phy.c needs to be netdev_priv()-ized like the other parts of
the driver
33) merge-stopper: mii_parse_sr(). never wait for autonegotiation to
complete. it is an asynchronous operation that could exceed 30 seconds.
34) merge-stopper: dm9161_wait(). same thing as #33.
35) liberally borrow code and ideas from Ben H's sungem_phy.c.
Eventually we want to move to a generic phy module.
[-- Attachment #2: patch --]
[-- Type: text/plain, Size: 109859 bytes --]
diff -Nru a/drivers/net/Kconfig b/drivers/net/Kconfig
--- a/drivers/net/Kconfig 2004-06-28 10:16:57 -05:00
+++ b/drivers/net/Kconfig 2004-06-28 10:16:57 -05:00
@@ -2111,6 +2111,17 @@
To compile this driver as a module, choose M here: the module
will be called tg3. This is recommended.
+config GIANFAR
+ tristate "Gianfar Ethernet"
+ depends on 85xx
+ help
+ This driver supports the Gigabit TSEC on the MPC85xx
+ family of chips, and the FEC on the 8540
+
+config GFAR_NAPI
+ bool "NAPI Support"
+ depends on GIANFAR
+
endmenu
#
diff -Nru a/drivers/net/Makefile b/drivers/net/Makefile
--- a/drivers/net/Makefile 2004-06-28 10:16:57 -05:00
+++ b/drivers/net/Makefile 2004-06-28 10:16:57 -05:00
@@ -10,6 +10,7 @@
obj-$(CONFIG_IBM_EMAC) += ibm_emac/
obj-$(CONFIG_IXGB) += ixgb/
obj-$(CONFIG_BONDING) += bonding/
+obj-$(CONFIG_GIANFAR) += gianfar.o gianfar_ethtool.o gianfar_phy.o
#
# link order important here
diff -Nru a/drivers/net/gianfar.c b/drivers/net/gianfar.c
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/net/gianfar.c 2004-06-28 10:16:57 -05:00
@@ -0,0 +1,1921 @@
+/*
+ * drivers/net/gianfar.c
+ *
+ * Gianfar Ethernet Driver
+ * Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
+ * Based on 8260_io/fcc_enet.c
+ *
+ * Author: Andy Fleming
+ * Maintainer: Kumar Gala (kumar.gala@freescale.com)
+ *
+ * Copyright 2004 Freescale Semiconductor, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Gianfar: AKA Lambda Draconis, "Dragon"
+ * RA 11 31 24.2
+ * Dec +69 19 52
+ * V 3.84
+ * B-V +1.62
+ *
+ * Theory of operation
+ * This driver is designed for the Triple-speed Ethernet
+ * controllers on the Freescale 8540/8560 integrated processors,
+ * as well as the Fast Ethernet Controller on the 8540.
+ *
+ * The driver is initialized through OCP. Structures which
+ * define the configuration needed by the board are defined in a
+ * board structure in arch/ppc/platforms (though I do not
+ * discount the possibility that other architectures could one
+ * day be supported. One assumption the driver currently makes
+ * is that the PHY is configured in such a way to advertise all
+ * capabilities. This is a sensible default, and on certain
+ * PHYs, changing this default encounters substantial errata
+ * issues. Future versions may remove this requirement, but for
+ * now, it is best for the firmware to ensure this is the case.
+ *
+ * The Gianfar Ethernet Controller uses a ring of buffer
+ * descriptors. The beginning is indicated by a register
+ * pointing to the physical address of the start of the ring.
+ * The end is determined by a "wrap" bit being set in the
+ * last descriptor of the ring.
+ *
+ * When a packet is received, the RXF bit in the
+ * IEVENT register is set, triggering an interrupt when the
+ * corresponding bit in the IMASK register is also set (if
+ * interrupt coalescing is active, then the interrupt may not
+ * happen immediately, but will wait until either a set number
+ * of frames or amount of time have passed.). In NAPI, the
+ * interrupt handler will signal there is work to be done, and
+ * exit. Without NAPI, the packet(s) will be handled
+ * immediately. Both methods will start at the last known empty
+ * descriptor, and process every subsequent descriptor until there
+ * are none left with data (NAPI will stop after a set number of
+ * packets to give time to other tasks, but will eventually
+ * process all the packets). The data arrives inside a
+ * pre-allocated skb, and so after the skb is passed up to the
+ * stack, a new skb must be allocated, and the address field in
+ * the buffer descriptor must be updated to indicate this new
+ * skb.
+ *
+ * When the kernel requests that a packet be transmitted, the
+ * driver starts where it left off last time, and points the
+ * descriptor at the buffer which was passed in. The driver
+ * then informs the DMA engine that there are packets ready to
+ * be transmitted. Once the controller is finished transmitting
+ * the packet, an interrupt may be triggered (under the same
+ * conditions as for reception, but depending on the TXF bit).
+ * The driver then cleans up the buffer.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/dma-mapping.h>
+#include <linux/crc32.h>
+
+#include "gianfar.h"
+#include "gianfar_phy.h"
+#ifdef CONFIG_NET_FASTROUTE
+#include <linux/if_arp.h>
+#include <net/ip.h>
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,41)
+#define irqreturn_t void
+#define IRQ_HANDLED
+#endif
+
+#define TX_TIMEOUT (1*HZ)
+#define SKB_ALLOC_TIMEOUT 1000000
+#undef BRIEF_GFAR_ERRORS
+#undef VERBOSE_GFAR_ERRORS
+
+#ifdef CONFIG_GFAR_NAPI
+#define RECEIVE(x) netif_receive_skb(x)
+#else
+#define RECEIVE(x) netif_rx(x)
+#endif
+
+#define DEVICE_NAME "%s: Gianfar Ethernet Controller Version 1.0, "
+char gfar_driver_name[] = "Gianfar Ethernet";
+char gfar_driver_version[] = "1.0";
+
+int startup_gfar(struct net_device *dev);
+static int gfar_enet_open(struct net_device *dev);
+static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static void gfar_timeout(struct net_device *dev);
+static int gfar_close(struct net_device *dev);
+struct sk_buff *gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp);
+static struct net_device_stats *gfar_get_stats(struct net_device *dev);
+static int gfar_set_mac_address(struct net_device *dev);
+static int gfar_change_mtu(struct net_device *dev, int new_mtu);
+static irqreturn_t gfar_error(int irq, void *dev_id, struct pt_regs *regs);
+static irqreturn_t gfar_transmit(int irq, void *dev_id, struct pt_regs *regs);
+irqreturn_t gfar_receive(int irq, void *dev_id, struct pt_regs *regs);
+static irqreturn_t gfar_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static irqreturn_t phy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static void gfar_phy_change(void *data);
+static void gfar_phy_timer(unsigned long data);
+static void adjust_link(struct net_device *dev);
+static void init_registers(struct net_device *dev);
+static int init_phy(struct net_device *dev);
+static int gfar_probe(struct ocp_device *ocpdev);
+static void gfar_remove(struct ocp_device *ocpdev);
+void free_skb_resources(struct gfar_private *priv);
+static void gfar_set_multi(struct net_device *dev);
+static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
+#ifdef CONFIG_GFAR_NAPI
+static int gfar_poll(struct net_device *dev, int *budget);
+#endif
+#ifdef CONFIG_NET_FASTROUTE
+static int gfar_accept_fastpath(struct net_device *dev, struct dst_entry *dst);
+#endif
+static inline int try_fastroute(struct sk_buff *skb, struct net_device *dev, int length);
+#ifdef CONFIG_GFAR_NAPI
+static int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
+#else
+static int gfar_clean_rx_ring(struct net_device *dev);
+#endif
+static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length);
+
+extern struct ethtool_ops gfar_ethtool_ops;
+extern void gfar_gstrings_normon(struct net_device *dev, u32 stringset,
+ u8 * buf);
+extern void gfar_fill_stats_normon(struct net_device *dev,
+ struct ethtool_stats *dummy, u64 * buf);
+extern int gfar_stats_count_normon(struct net_device *dev);
+
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc");
+MODULE_DESCRIPTION("Gianfar Ethernet Driver");
+MODULE_LICENSE("GPL");
+
+/* Called by the ocp code to initialize device data structures
+ * required for bringing up the device
+ * returns 0 on success */
+static int gfar_probe(struct ocp_device *ocpdev)
+{
+ u32 tempval;
+ struct ocp_device *mdiodev;
+ struct net_device *dev = NULL;
+ struct gfar_private *priv = NULL;
+ struct ocp_gfar_data *einfo;
+ int idx;
+ int err = 0;
+ struct ethtool_ops *dev_ethtool_ops;
+
+ einfo = (struct ocp_gfar_data *) ocpdev->def->additions;
+
+ if (einfo == NULL) {
+ printk(KERN_ERR "gfar %d: Missing additional data!\n",
+ ocpdev->def->index);
+
+ return -ENODEV;
+ }
+
+ /* get a pointer to the register memory which can
+ * configure the PHYs. If it's different from this set,
+ * get the device which has those regs */
+ if ((einfo->phyregidx >= 0) && (einfo->phyregidx != ocpdev->def->index)) {
+ mdiodev = ocp_find_device(OCP_ANY_ID,
+ OCP_FUNC_GFAR, einfo->phyregidx);
+
+ /* If the device which holds the MDIO regs isn't
+ * up, wait for it to come up */
+ if (mdiodev == NULL)
+ return -EAGAIN;
+ } else {
+ mdiodev = ocpdev;
+ }
+
+ /* Create an ethernet device instance */
+ dev = alloc_etherdev(sizeof (*priv));
+
+ if (dev == NULL)
+ return -ENOMEM;
+
+ priv = netdev_priv(dev);
+
+ /* Set the info in the priv to the current info */
+ priv->einfo = einfo;
+
+ /* get a pointer to the register memory */
+ priv->regs = (struct gfar *)
+ ioremap(ocpdev->def->paddr, sizeof (struct gfar));
+
+ if (priv->regs == NULL) {
+ err = -ENOMEM;
+ goto regs_fail;
+ }
+
+ /* Set the PHY base address */
+ priv->phyregs = (struct gfar *)
+ ioremap(mdiodev->def->paddr, sizeof (struct gfar));
+
+ if (priv->phyregs == NULL) {
+ err = -ENOMEM;
+ goto phy_regs_fail;
+ }
+
+ ocp_set_drvdata(ocpdev, dev);
+
+ /* Stop the DMA engine now, in case it was running before */
+ /* (The firmware could have used it, and left it running). */
+ /* To do this, we write Graceful Receive Stop and Graceful */
+ /* Transmit Stop, and then wait until the corresponding bits */
+ /* in IEVENT indicate the stops have completed. */
+ tempval = gfar_read(&priv->regs->dmactrl);
+ tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
+ gfar_write(&priv->regs->dmactrl, tempval);
+
+ tempval = gfar_read(&priv->regs->dmactrl);
+ tempval |= (DMACTRL_GRS | DMACTRL_GTS);
+ gfar_write(&priv->regs->dmactrl, tempval);
+
+ while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)))
+ cpu_relax();
+
+ /* Reset MAC layer */
+ gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
+
+ tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
+ gfar_write(&priv->regs->maccfg1, tempval);
+
+ /* Initialize MACCFG2. */
+ gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS);
+
+ /* Initialize ECNTRL */
+ gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS);
+
+ /* Copy the station address into the dev structure, */
+ /* and into the address registers MAC_STNADDR1,2. */
+ /* Backwards, because little endian MACs are dumb. */
+ /* Don't set the regs if the firmware already did */
+ memcpy(dev->dev_addr, einfo->mac_addr, MAC_ADDR_LEN);
+
+ /* Set the dev->base_addr to the gfar reg region */
+ dev->base_addr = (unsigned long) (priv->regs);
+
+ SET_MODULE_OWNER(dev);
+
+ /* Fill in the dev structure */
+ dev->open = gfar_enet_open;
+ dev->hard_start_xmit = gfar_start_xmit;
+ dev->tx_timeout = gfar_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+#ifdef CONFIG_GFAR_NAPI
+ dev->poll = gfar_poll;
+ dev->weight = GFAR_DEV_WEIGHT;
+#endif
+ dev->stop = gfar_close;
+ dev->get_stats = gfar_get_stats;
+ dev->change_mtu = gfar_change_mtu;
+ dev->mtu = 1500;
+ dev->set_multicast_list = gfar_set_multi;
+ dev->flags |= IFF_MULTICAST;
+
+ dev_ethtool_ops =
+ (struct ethtool_ops *)kmalloc(sizeof(struct ethtool_ops),
+ GFP_KERNEL);
+
+ if(dev_ethtool_ops == NULL) {
+ err = -ENOMEM;
+ goto ethtool_fail;
+ }
+
+ memcpy(dev_ethtool_ops, &gfar_ethtool_ops, sizeof(gfar_ethtool_ops));
+
+ /* If there is no RMON support in this device, we don't
+ * want to expose non-existant statistics */
+ if((priv->einfo->flags & GFAR_HAS_RMON) == 0) {
+ dev_ethtool_ops->get_strings = gfar_gstrings_normon;
+ dev_ethtool_ops->get_stats_count = gfar_stats_count_normon;
+ dev_ethtool_ops->get_ethtool_stats = gfar_fill_stats_normon;
+ }
+
+ if((priv->einfo->flags & GFAR_HAS_COALESCE) == 0) {
+ dev_ethtool_ops->set_coalesce = NULL;
+ dev_ethtool_ops->get_coalesce = NULL;
+ }
+
+ dev->ethtool_ops = dev_ethtool_ops;
+
+#ifdef CONFIG_NET_FASTROUTE
+ dev->accept_fastpath = gfar_accept_fastpath;
+#endif
+
+ priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
+#ifdef CONFIG_GFAR_BUFSTASH
+ priv->rx_stash_size = STASH_LENGTH;
+#endif
+ priv->tx_ring_size = DEFAULT_TX_RING_SIZE;
+ priv->rx_ring_size = DEFAULT_RX_RING_SIZE;
+
+ /* Initially, coalescing is disabled */
+ priv->txcoalescing = 0;
+ priv->txcount = 0;
+ priv->txtime = 0;
+ priv->rxcoalescing = 0;
+ priv->rxcount = 0;
+ priv->rxtime = 0;
+
+ err = register_netdev(dev);
+
+ if (err) {
+ printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
+ dev->name);
+ goto register_fail;
+ }
+
+ /* Print out the device info */
+ printk(DEVICE_NAME, dev->name);
+ for (idx = 0; idx < 6; idx++)
+ printk("%2.2x%c", dev->dev_addr[idx], idx == 5 ? ' ' : ':');
+ printk("\n");
+
+ /* Even more device info helps when determining which kernel */
+ /* provided which set of benchmarks. Since this is global for all */
+ /* devices, we only print it once */
+#ifdef CONFIG_GFAR_NAPI
+ printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name);
+#else
+ printk(KERN_INFO "%s: Running with NAPI disabled\n", dev->name);
+#endif
+ printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n",
+ dev->name, priv->rx_ring_size, priv->tx_ring_size);
+
+ return 0;
+
+
+register_fail:
+ kfree(dev_ethtool_ops);
+ethtool_fail:
+ iounmap((void *) priv->phyregs);
+phy_regs_fail:
+ iounmap((void *) priv->regs);
+regs_fail:
+ free_netdev(dev);
+ return -ENOMEM;
+}
+
+static void gfar_remove(struct ocp_device *ocpdev)
+{
+ struct net_device *dev = ocp_get_drvdata(ocpdev);
+ struct gfar_private *priv = netdev_priv(dev);
+
+ ocp_set_drvdata(ocpdev, NULL);
+
+ kfree(dev->ethtool_ops);
+ iounmap((void *) priv->regs);
+ iounmap((void *) priv->phyregs);
+ free_netdev(dev);
+}
+
+/* Configure the PHY for dev.
+ * returns 0 if success. -1 if failure
+ */
+static int init_phy(struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+ struct phy_info *curphy;
+
+ priv->link = 1;
+ priv->oldlink = 0;
+ priv->oldspeed = 0;
+ priv->olddplx = -1;
+
+ /* get info for this PHY */
+ curphy = get_phy_info(dev);
+
+ if (curphy == NULL) {
+ printk(KERN_ERR "%s: No PHY found\n", dev->name);
+ return -1;
+ }
+
+ priv->phyinfo = curphy;
+
+ /* Run the commands which configure the PHY */
+ phy_run_commands(dev, curphy->config);
+
+ return 0;
+}
+
+static void init_registers(struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+
+ /* Clear IEVENT */
+ gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR);
+
+ /* Initialize IMASK */
+ gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR);
+
+ /* Init hash registers to zero */
+ gfar_write(&priv->regs->iaddr0, 0);
+ gfar_write(&priv->regs->iaddr1, 0);
+ gfar_write(&priv->regs->iaddr2, 0);
+ gfar_write(&priv->regs->iaddr3, 0);
+ gfar_write(&priv->regs->iaddr4, 0);
+ gfar_write(&priv->regs->iaddr5, 0);
+ gfar_write(&priv->regs->iaddr6, 0);
+ gfar_write(&priv->regs->iaddr7, 0);
+
+ gfar_write(&priv->regs->gaddr0, 0);
+ gfar_write(&priv->regs->gaddr1, 0);
+ gfar_write(&priv->regs->gaddr2, 0);
+ gfar_write(&priv->regs->gaddr3, 0);
+ gfar_write(&priv->regs->gaddr4, 0);
+ gfar_write(&priv->regs->gaddr5, 0);
+ gfar_write(&priv->regs->gaddr6, 0);
+ gfar_write(&priv->regs->gaddr7, 0);
+
+ /* Zero out rctrl */
+ gfar_write(&priv->regs->rctrl, 0x00000000);
+
+ /* Zero out the rmon mib registers if it has them */
+ if (priv->einfo->flags & GFAR_HAS_RMON) {
+ memset((void *) &(priv->regs->rmon), 0,
+ sizeof (struct rmon_mib));
+
+ /* Mask off the CAM interrupts */
+ gfar_write(&priv->regs->rmon.cam1, 0xffffffff);
+ gfar_write(&priv->regs->rmon.cam2, 0xffffffff);
+ }
+
+ /* Initialize the max receive buffer length */
+ gfar_write(&priv->regs->mrblr, priv->rx_buffer_size);
+
+#ifdef CONFIG_GFAR_BUFSTASH
+ /* If we are stashing buffers, we need to set the
+ * extraction length to the size of the buffer */
+ gfar_write(&priv->regs->attreli, priv->rx_stash_size << 16);
+#endif
+
+ /* Initialize the Minimum Frame Length Register */
+ gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS);
+
+ /* Setup Attributes so that snooping is on for rx */
+ gfar_write(&priv->regs->attr, ATTR_INIT_SETTINGS);
+ gfar_write(&priv->regs->attreli, ATTRELI_INIT_SETTINGS);
+
+ /* Assign the TBI an address which won't conflict with the PHYs */
+ gfar_write(&priv->regs->tbipa, TBIPA_VALUE);
+}
+
+void stop_gfar(struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+ struct gfar *regs = priv->regs;
+ unsigned long flags;
+ u32 tempval;
+
+ /* Lock it down */
+ spin_lock_irqsave(&priv->lock, flags);
+
+ /* Tell the kernel the link is down */
+ priv->link = 0;
+ adjust_link(dev);
+
+ /* Mask all interrupts */
+ gfar_write(®s->imask, IMASK_INIT_CLEAR);
+
+ /* Clear all interrupts */
+ gfar_write(®s->ievent, IEVENT_INIT_CLEAR);
+
+ /* Stop the DMA, and wait for it to stop */
+ tempval = gfar_read(&priv->regs->dmactrl);
+ if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
+ != (DMACTRL_GRS | DMACTRL_GTS)) {
+ tempval |= (DMACTRL_GRS | DMACTRL_GTS);
+ gfar_write(&priv->regs->dmactrl, tempval);
+
+ while (!(gfar_read(&priv->regs->ievent) &
+ (IEVENT_GRSC | IEVENT_GTSC)))
+ cpu_relax();
+ }
+
+ /* Disable Rx and Tx */
+ tempval = gfar_read(®s->maccfg1);
+ tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
+ gfar_write(®s->maccfg1, tempval);
+
+ if (priv->einfo->flags & GFAR_HAS_PHY_INTR) {
+ phy_run_commands(dev, priv->phyinfo->shutdown);
+ }
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ /* Free the IRQs */
+ if (priv->einfo->flags & GFAR_HAS_MULTI_INTR) {
+ free_irq(priv->einfo->interruptError, dev);
+ free_irq(priv->einfo->interruptTransmit, dev);
+ free_irq(priv->einfo->interruptReceive, dev);
+ } else {
+ free_irq(priv->einfo->interruptTransmit, dev);
+ }
+
+ if (priv->einfo->flags & GFAR_HAS_PHY_INTR) {
+ free_irq(priv->einfo->interruptPHY, dev);
+ } else {
+ del_timer_sync(&priv->phy_info_timer);
+ }
+
+ free_skb_resources(priv);
+
+ dma_unmap_single(NULL, gfar_read(®s->tbase),
+ sizeof(struct txbd)*priv->tx_ring_size,
+ DMA_BIDIRECTIONAL);
+ dma_unmap_single(NULL, gfar_read(®s->rbase),
+ sizeof(struct rxbd)*priv->rx_ring_size,
+ DMA_BIDIRECTIONAL);
+
+ /* Free the buffer descriptors */
+ kfree(priv->tx_bd_base);
+}
+
+/* If there are any tx skbs or rx skbs still around, free them.
+ * Then free tx_skbuff and rx_skbuff */
+void free_skb_resources(struct gfar_private *priv)
+{
+ struct rxbd8 *rxbdp;
+ struct txbd8 *txbdp;
+ int i;
+
+ /* Go through all the buffer descriptors and free their data buffers */
+ txbdp = priv->tx_bd_base;
+
+ for (i = 0; i < priv->tx_ring_size; i++) {
+
+ if (priv->tx_skbuff[i]) {
+ dma_unmap_single(NULL, txbdp->bufPtr,
+ txbdp->length,
+ DMA_TO_DEVICE);
+ dev_kfree_skb_any(priv->tx_skbuff[i]);
+ priv->tx_skbuff[i] = NULL;
+ }
+ }
+
+ kfree(priv->tx_skbuff);
+
+ rxbdp = priv->rx_bd_base;
+
+ /* rx_skbuff is not guaranteed to be allocated, so only
+ * free it and its contents if it is allocated */
+ if(priv->rx_skbuff != NULL) {
+ for (i = 0; i < priv->rx_ring_size; i++) {
+ if (priv->rx_skbuff[i]) {
+ dma_unmap_single(NULL, rxbdp->bufPtr,
+ priv->rx_buffer_size
+ + RXBUF_ALIGNMENT,
+ DMA_FROM_DEVICE);
+
+ dev_kfree_skb_any(priv->rx_skbuff[i]);
+ priv->rx_skbuff[i] = NULL;
+ }
+
+ rxbdp->status = 0;
+ rxbdp->length = 0;
+ rxbdp->bufPtr = 0;
+
+ rxbdp++;
+ }
+
+ kfree(priv->rx_skbuff);
+ }
+}
+
+/* Bring the controller up and running */
+int startup_gfar(struct net_device *dev)
+{
+ struct txbd8 *txbdp;
+ struct rxbd8 *rxbdp;
+ unsigned long addr;
+ int i;
+ struct gfar_private *priv = netdev_priv(dev);
+ struct gfar *regs = priv->regs;
+ u32 tempval;
+ int err = 0;
+
+ gfar_write(®s->imask, IMASK_INIT_CLEAR);
+
+ /* Allocate memory for the buffer descriptors */
+ addr =
+ (unsigned int) kmalloc(sizeof (struct txbd8) * priv->tx_ring_size +
+ sizeof (struct rxbd8) * priv->rx_ring_size,
+ GFP_KERNEL);
+
+ if (addr == 0) {
+ printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n",
+ dev->name);
+ return -ENOMEM;
+ }
+
+ priv->tx_bd_base = (struct txbd8 *) addr;
+
+ /* enet DMA only understands physical addresses */
+ gfar_write(®s->tbase,
+ dma_map_single(NULL, (void *)addr,
+ sizeof(struct txbd8) * priv->tx_ring_size,
+ DMA_BIDIRECTIONAL));
+
+ /* Start the rx descriptor ring where the tx ring leaves off */
+ addr = addr + sizeof (struct txbd8) * priv->tx_ring_size;
+ priv->rx_bd_base = (struct rxbd8 *) addr;
+ gfar_write(®s->rbase,
+ dma_map_single(NULL, (void *)addr,
+ sizeof(struct rxbd8) * priv->rx_ring_size,
+ DMA_BIDIRECTIONAL));
+
+ /* Setup the skbuff rings */
+ priv->tx_skbuff =
+ (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
+ priv->tx_ring_size, GFP_KERNEL);
+
+ if (priv->tx_skbuff == NULL) {
+ printk(KERN_ERR "%s: Could not allocate tx_skbuff\n",
+ dev->name);
+ err = -ENOMEM;
+ goto tx_skb_fail;
+ }
+
+ for (i = 0; i < priv->tx_ring_size; i++)
+ priv->tx_skbuff[i] = NULL;
+
+ priv->rx_skbuff =
+ (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
+ priv->rx_ring_size, GFP_KERNEL);
+
+ if (priv->rx_skbuff == NULL) {
+ printk(KERN_ERR "%s: Could not allocate rx_skbuff\n",
+ dev->name);
+ err = -ENOMEM;
+ goto rx_skb_fail;
+ }
+
+ for (i = 0; i < priv->rx_ring_size; i++)
+ priv->rx_skbuff[i] = NULL;
+
+ /* Initialize some variables in our dev structure */
+ priv->dirty_tx = priv->cur_tx = priv->tx_bd_base;
+ priv->cur_rx = priv->rx_bd_base;
+ priv->skb_curtx = priv->skb_dirtytx = 0;
+ priv->skb_currx = 0;
+
+ /* Initialize Transmit Descriptor Ring */
+ txbdp = priv->tx_bd_base;
+ for (i = 0; i < priv->tx_ring_size; i++) {
+ txbdp->status = 0;
+ txbdp->length = 0;
+ txbdp->bufPtr = 0;
+ txbdp++;
+ }
+
+ /* Set the last descriptor in the ring to indicate wrap */
+ txbdp--;
+ txbdp->status |= TXBD_WRAP;
+
+ rxbdp = priv->rx_bd_base;
+ for (i = 0; i < priv->rx_ring_size; i++) {
+ struct sk_buff *skb = NULL;
+
+ rxbdp->status = 0;
+
+ skb = gfar_new_skb(dev, rxbdp);
+
+ priv->rx_skbuff[i] = skb;
+
+ rxbdp++;
+ }
+
+ /* Set the last descriptor in the ring to wrap */
+ rxbdp--;
+ rxbdp->status |= RXBD_WRAP;
+
+ /* If the device has multiple interrupts, register for
+ * them. Otherwise, only register for the one */
+ if (priv->einfo->flags & GFAR_HAS_MULTI_INTR) {
+ /* Install our interrupt handlers for Error,
+ * Transmit, and Receive */
+ if (request_irq(priv->einfo->interruptError, gfar_error,
+ 0, "enet_error", dev) < 0) {
+ printk(KERN_ERR "%s: Can't get IRQ %d\n",
+ dev->name, priv->einfo->interruptError);
+
+ err = -1;
+ goto err_irq_fail;
+ }
+
+ if (request_irq(priv->einfo->interruptTransmit, gfar_transmit,
+ 0, "enet_tx", dev) < 0) {
+ printk(KERN_ERR "%s: Can't get IRQ %d\n",
+ dev->name, priv->einfo->interruptTransmit);
+
+ err = -1;
+
+ goto tx_irq_fail;
+ }
+
+ if (request_irq(priv->einfo->interruptReceive, gfar_receive,
+ 0, "enet_rx", dev) < 0) {
+ printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n",
+ dev->name, priv->einfo->interruptReceive);
+
+ err = -1;
+ goto rx_irq_fail;
+ }
+ } else {
+ if (request_irq(priv->einfo->interruptTransmit, gfar_interrupt,
+ 0, "gfar_interrupt", dev) < 0) {
+ printk(KERN_ERR "%s: Can't get IRQ %d\n",
+ dev->name, priv->einfo->interruptError);
+
+ err = -1;
+ goto err_irq_fail;
+ }
+ }
+
+ /* Grab the PHY interrupt */
+ if (priv->einfo->flags & GFAR_HAS_PHY_INTR) {
+ if (request_irq(priv->einfo->interruptPHY, phy_interrupt,
+ SA_SHIRQ, "phy_interrupt", dev) < 0) {
+ printk(KERN_ERR "%s: Can't get IRQ %d (PHY)\n",
+ dev->name, priv->einfo->interruptPHY);
+
+ err = -1;
+
+ if (priv->einfo->flags & GFAR_HAS_MULTI_INTR)
+ goto phy_irq_fail;
+ else
+ goto tx_irq_fail;
+ }
+ } else {
+ init_timer(&priv->phy_info_timer);
+ priv->phy_info_timer.function = &gfar_phy_timer;
+ priv->phy_info_timer.data = (unsigned long) dev;
+ mod_timer(&priv->phy_info_timer, jiffies + 2 * HZ);
+ }
+
+ /* Set up the bottom half queue */
+ INIT_WORK(&priv->tq, (void (*)(void *))gfar_phy_change, dev);
+
+ /* Configure the PHY interrupt */
+ phy_run_commands(dev, priv->phyinfo->startup);
+
+ /* Tell the kernel the link is up, and determine the
+ * negotiated features (speed, duplex) */
+ adjust_link(dev);
+
+ if (priv->link == 0)
+ printk(KERN_INFO "%s: No link detected\n", dev->name);
+
+ /* Configure the coalescing support */
+ if (priv->txcoalescing)
+ gfar_write(®s->txic,
+ mk_ic_value(priv->txcount, priv->txtime));
+ else
+ gfar_write(®s->txic, 0);
+
+ if (priv->rxcoalescing)
+ gfar_write(®s->rxic,
+ mk_ic_value(priv->rxcount, priv->rxtime));
+ else
+ gfar_write(®s->rxic, 0);
+
+ init_waitqueue_head(&priv->rxcleanupq);
+
+ /* Enable Rx and Tx in MACCFG1 */
+ tempval = gfar_read(®s->maccfg1);
+ tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
+ gfar_write(®s->maccfg1, tempval);
+
+ /* Initialize DMACTRL to have WWR and WOP */
+ tempval = gfar_read(&priv->regs->dmactrl);
+ tempval |= DMACTRL_INIT_SETTINGS;
+ gfar_write(&priv->regs->dmactrl, tempval);
+
+ /* Clear THLT, so that the DMA starts polling now */
+ gfar_write(®s->tstat, TSTAT_CLEAR_THALT);
+
+ /* Make sure we aren't stopped */
+ tempval = gfar_read(&priv->regs->dmactrl);
+ tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
+ gfar_write(&priv->regs->dmactrl, tempval);
+
+ /* Unmask the interrupts we look for */
+ gfar_write(®s->imask, IMASK_DEFAULT);
+
+ return 0;
+
+phy_irq_fail:
+ free_irq(priv->einfo->interruptReceive, dev);
+rx_irq_fail:
+ free_irq(priv->einfo->interruptTransmit, dev);
+tx_irq_fail:
+ free_irq(priv->einfo->interruptError, dev);
+err_irq_fail:
+rx_skb_fail:
+ free_skb_resources(priv);
+tx_skb_fail:
+ kfree(priv->tx_bd_base);
+ return err;
+}
+
+/* Called when something needs to use the ethernet device */
+/* Returns 0 for success. */
+static int gfar_enet_open(struct net_device *dev)
+{
+ int err;
+
+ /* Initialize a bunch of registers */
+ init_registers(dev);
+
+ gfar_set_mac_address(dev);
+
+ err = init_phy(dev);
+
+ if (err)
+ return err;
+
+ err = startup_gfar(dev);
+
+ netif_start_queue(dev);
+
+ return err;
+}
+
+/* This is called by the kernel when a frame is ready for transmission. */
+/* It is pointed to by the dev->hard_start_xmit function pointer */
+static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+ struct txbd8 *txbdp;
+
+ /* Update transmit stats */
+ priv->stats.tx_bytes += skb->len;
+
+ /* Lock priv now */
+ spin_lock_irq(&priv->lock);
+
+ /* Point at the first free tx descriptor */
+ txbdp = priv->cur_tx;
+
+ /* Clear all but the WRAP status flags */
+ txbdp->status &= TXBD_WRAP;
+
+ /* Set buffer length and pointer */
+ txbdp->length = skb->len;
+ txbdp->bufPtr = dma_map_single(NULL, skb->data,
+ skb->len, DMA_TO_DEVICE);
+
+ /* Save the skb pointer so we can free it later */
+ priv->tx_skbuff[priv->skb_curtx] = skb;
+
+ /* Update the current skb pointer (wrapping if this was the last) */
+ priv->skb_curtx =
+ (priv->skb_curtx + 1) & TX_RING_MOD_MASK(priv->tx_ring_size);
+
+ /* Flag the BD as interrupt-causing */
+ txbdp->status |= TXBD_INTERRUPT;
+
+ /* Flag the BD as ready to go, last in frame, and */
+ /* in need of CRC */
+ txbdp->status |= (TXBD_READY | TXBD_LAST | TXBD_CRC);
+
+ dev->trans_start = jiffies;
+
+ /* If this was the last BD in the ring, the next one */
+ /* is at the beginning of the ring */
+ if (txbdp->status & TXBD_WRAP)
+ txbdp = priv->tx_bd_base;
+ else
+ txbdp++;
+
+ /* If the next BD still needs to be cleaned up, then the bds
+ are full. We need to tell the kernel to stop sending us stuff. */
+ if (txbdp == priv->dirty_tx) {
+ netif_stop_queue(dev);
+
+ priv->stats.tx_fifo_errors++;
+ }
+
+ /* Update the current txbd to the next one */
+ priv->cur_tx = txbdp;
+
+ /* Tell the DMA to go go go */
+ gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
+
+ /* Unlock priv */
+ spin_unlock_irq(&priv->lock);
+
+ return 0;
+}
+
+/* Stops the kernel queue, and halts the controller */
+static int gfar_close(struct net_device *dev)
+{
+ stop_gfar(dev);
+
+ netif_stop_queue(dev);
+
+ return 0;
+}
+
+/* returns a net_device_stats structure pointer */
+static struct net_device_stats * gfar_get_stats(struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+
+ return &(priv->stats);
+}
+
+/* Changes the mac address if the controller is not running. */
+int gfar_set_mac_address(struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+ int i;
+ char tmpbuf[MAC_ADDR_LEN];
+ u32 tempval;
+
+ /* Now copy it into the mac registers backwards, cuz */
+ /* little endian is silly */
+ for (i = 0; i < MAC_ADDR_LEN; i++)
+ tmpbuf[MAC_ADDR_LEN - 1 - i] = dev->dev_addr[i];
+
+ gfar_write(&priv->regs->macstnaddr1, *((u32 *) (tmpbuf)));
+
+ tempval = *((u32 *) (tmpbuf + 4));
+
+ gfar_write(&priv->regs->macstnaddr2, tempval);
+
+ return 0;
+}
+
+/**********************************************************************
+ * gfar_accept_fastpath
+ *
+ * Used to authenticate to the kernel that a fast path entry can be
+ * added to device's routing table cache
+ *
+ * Input : pointer to ethernet interface network device structure and
+ * a pointer to the designated entry to be added to the cache.
+ * Output : zero upon success, negative upon failure
+ **********************************************************************/
+#ifdef CONFIG_NET_FASTROUTE
+static int gfar_accept_fastpath(struct net_device *dev, struct dst_entry *dst)
+{
+ struct net_device *odev = dst->dev;
+
+ if ((dst->ops->protocol != __constant_htons(ETH_P_IP))
+ || (odev->type != ARPHRD_ETHER)
+ || (odev->accept_fastpath == NULL)) {
+ return -1;
+ }
+
+ return 0;
+}
+#endif
+
+/* try_fastroute() -- Checks the fastroute cache to see if a given packet
+ * can be routed immediately to another device. If it can, we send it.
+ * If we used a fastroute, we return 1. Otherwise, we return 0.
+ * Returns 0 if CONFIG_NET_FASTROUTE is not on
+ */
+static inline int try_fastroute(struct sk_buff *skb, struct net_device *dev, int length)
+{
+#ifdef CONFIG_NET_FASTROUTE
+ struct ethhdr *eth;
+ struct iphdr *iph;
+ unsigned int hash;
+ struct rtable *rt;
+ struct net_device *odev;
+ struct gfar_private *priv = netdev_priv(dev);
+ unsigned int CPU_ID = smp_processor_id();
+
+ eth = (struct ethhdr *) (skb->data);
+
+ /* Only route ethernet IP packets */
+ if (eth->h_proto == __constant_htons(ETH_P_IP)) {
+ iph = (struct iphdr *) (skb->data + ETH_HLEN);
+
+ /* Generate the hash value */
+ hash = ((*(u8 *) &iph->daddr) ^ (*(u8 *) & iph->saddr)) & NETDEV_FASTROUTE_HMASK;
+
+ rt = (struct rtable *) (dev->fastpath[hash]);
+ if (rt != NULL
+ && ((*(u32 *) &iph->daddr) == (*(u32 *) &rt->key.dst))
+ && ((*(u32 *) &iph->saddr) == (*(u32 *) &rt->key.src))
+ && !(rt->u.dst.obsolete)) {
+ odev = rt->u.dst.dev;
+ netdev_rx_stat[CPU_ID].fastroute_hit++;
+
+ /* Make sure the packet is:
+ * 1) IPv4
+ * 2) without any options (header length of 5)
+ * 3) Not a multicast packet
+ * 4) going to a valid destination
+ * 5) Not out of time-to-live
+ */
+ if (iph->version == 4
+ && iph->ihl == 5
+ && (!(eth->h_dest[0] & 0x01))
+ && neigh_is_valid(rt->u.dst.neighbour)
+ && iph->ttl > 1) {
+
+ /* Fast Route Path: Taken if the outgoing device is ready to transmit the packet now */
+ if ((!netif_queue_stopped(odev))
+ && (!spin_is_locked(odev->xmit_lock))
+ && (skb->len <= (odev->mtu + ETH_HLEN + 2 + 4))) {
+
+ skb->pkt_type = PACKET_FASTROUTE;
+ skb->protocol = __constant_htons(ETH_P_IP);
+ ip_decrease_ttl(iph);
+ memcpy(eth->h_source, odev->dev_addr, MAC_ADDR_LEN);
+ memcpy(eth->h_dest, rt->u.dst.neighbour->ha, MAC_ADDR_LEN);
+ skb->dev = odev;
+
+ /* Prep the skb for the packet */
+ skb_put(skb, length);
+
+ if (odev->hard_start_xmit(skb, odev) != 0) {
+ panic("%s: FastRoute path corrupted", dev->name);
+ }
+ netdev_rx_stat[CPU_ID].fastroute_success++;
+ }
+
+ /* Semi Fast Route Path: Mark the packet as needing fast routing, but let the
+ * stack handle getting it to the device */
+ else {
+ skb->pkt_type = PACKET_FASTROUTE;
+ skb->nh.raw = skb->data + ETH_HLEN;
+ skb->protocol = __constant_htons(ETH_P_IP);
+ netdev_rx_stat[CPU_ID].fastroute_defer++;
+
+ /* Prep the skb for the packet */
+ skb_put(skb, length);
+
+ if(RECEIVE(skb) == NET_RX_DROP) {
+ priv->extra_stats.kernel_dropped++;
+ }
+ }
+
+ return 1;
+ }
+ }
+ }
+#endif /* CONFIG_NET_FASTROUTE */
+ return 0;
+}
+
+static int gfar_change_mtu(struct net_device *dev, int new_mtu)
+{
+ int tempsize, tempval;
+ struct gfar_private *priv = netdev_priv(dev);
+ int oldsize = priv->rx_buffer_size;
+ int frame_size = new_mtu + 18;
+
+ if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
+ printk(KERN_ERR "%s: Invalid MTU setting\n", dev->name);
+ return -EINVAL;
+ }
+
+ tempsize =
+ (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
+ INCREMENTAL_BUFFER_SIZE;
+
+ /* Only stop and start the controller if it isn't already
+ * stopped */
+ if ((oldsize != tempsize) && (dev->flags & IFF_UP))
+ stop_gfar(dev);
+
+ priv->rx_buffer_size = tempsize;
+
+ dev->mtu = new_mtu;
+
+ gfar_write(&priv->regs->mrblr, priv->rx_buffer_size);
+ gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size);
+
+ /* If the mtu is larger than the max size for standard
+ * ethernet frames (ie, a jumbo frame), then set maccfg2
+ * to allow huge frames, and to check the length */
+ tempval = gfar_read(&priv->regs->maccfg2);
+
+ if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE)
+ tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
+ else
+ tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
+
+ gfar_write(&priv->regs->maccfg2, tempval);
+
+ if ((oldsize != tempsize) && (dev->flags & IFF_UP))
+ startup_gfar(dev);
+
+ return 0;
+}
+
+/* gfar_timeout gets called when a packet has not been
+ * transmitted after a set amount of time.
+ * For now, assume that clearing out all the structures, and
+ * starting over will fix the problem. */
+static void gfar_timeout(struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+
+ priv->stats.tx_errors++;
+
+ if (dev->flags & IFF_UP) {
+ stop_gfar(dev);
+ startup_gfar(dev);
+ }
+
+ if (!netif_queue_stopped(dev))
+ netif_schedule(dev);
+}
+
+/* Interrupt Handler for Transmit complete */
+static irqreturn_t gfar_transmit(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct gfar_private *priv = netdev_priv(dev);
+ struct txbd8 *bdp;
+
+ /* Clear IEVENT */
+ gfar_write(&priv->regs->ievent, IEVENT_TX_MASK);
+
+ /* Lock priv */
+ spin_lock(&priv->lock);
+ bdp = priv->dirty_tx;
+ while ((bdp->status & TXBD_READY) == 0) {
+ /* If dirty_tx and cur_tx are the same, then either the */
+ /* ring is empty or full now (it could only be full in the beginning, */
+ /* obviously). If it is empty, we are done. */
+ if ((bdp == priv->cur_tx) && (netif_queue_stopped(dev) == 0))
+ break;
+
+ priv->stats.tx_packets++;
+
+ /* Deferred means some collisions occurred during transmit, */
+ /* but we eventually sent the packet. */
+ if (bdp->status & TXBD_DEF)
+ priv->stats.collisions++;
+
+ /* Free the sk buffer associated with this TxBD */
+ dev_kfree_skb_irq(priv->tx_skbuff[priv->skb_dirtytx]);
+ priv->tx_skbuff[priv->skb_dirtytx] = NULL;
+ priv->skb_dirtytx =
+ (priv->skb_dirtytx +
+ 1) & TX_RING_MOD_MASK(priv->tx_ring_size);
+
+ /* update bdp to point at next bd in the ring (wrapping if necessary) */
+ if (bdp->status & TXBD_WRAP)
+ bdp = priv->tx_bd_base;
+ else
+ bdp++;
+
+ /* Move dirty_tx to be the next bd */
+ priv->dirty_tx = bdp;
+
+ /* We freed a buffer, so now we can restart transmission */
+ if (netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ } /* while ((bdp->status & TXBD_READY) == 0) */
+
+ /* If we are coalescing the interrupts, reset the timer */
+ /* Otherwise, clear it */
+ if (priv->txcoalescing)
+ gfar_write(&priv->regs->txic,
+ mk_ic_value(priv->txcount, priv->txtime));
+ else
+ gfar_write(&priv->regs->txic, 0);
+
+ spin_unlock(&priv->lock);
+
+ return IRQ_HANDLED;
+}
+
+struct sk_buff * gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+ struct sk_buff *skb = NULL;
+ unsigned int timeout = SKB_ALLOC_TIMEOUT;
+
+ /* We have to allocate the skb, so keep trying till we succeed */
+ while ((!skb) && timeout--)
+ skb = dev_alloc_skb(priv->rx_buffer_size + RXBUF_ALIGNMENT);
+
+ if (skb == NULL)
+ return NULL;
+
+ /* We need the data buffer to be aligned properly. We will reserve
+ * as many bytes as needed to align the data properly
+ */
+ skb_reserve(skb,
+ RXBUF_ALIGNMENT -
+ (((unsigned) skb->data) & (RXBUF_ALIGNMENT - 1)));
+
+ skb->dev = dev;
+
+ bdp->bufPtr = dma_map_single(NULL, skb->data,
+ priv->rx_buffer_size + RXBUF_ALIGNMENT,
+ DMA_FROM_DEVICE);
+
+ bdp->length = 0;
+
+ /* Mark the buffer empty */
+ bdp->status |= (RXBD_EMPTY | RXBD_INTERRUPT);
+
+ return skb;
+}
+
+static inline void count_errors(unsigned short status, struct gfar_private *priv)
+{
+ struct net_device_stats *stats = &priv->stats;
+ struct gfar_extra_stats *estats = &priv->extra_stats;
+
+ /* If the packet was truncated, none of the other errors
+ * matter */
+ if (status & RXBD_TRUNCATED) {
+ stats->rx_length_errors++;
+
+ estats->rx_trunc++;
+
+ return;
+ }
+ /* Count the errors, if there were any */
+ if (status & (RXBD_LARGE | RXBD_SHORT)) {
+ stats->rx_length_errors++;
+
+ if (status & RXBD_LARGE)
+ estats->rx_large++;
+ else
+ estats->rx_short++;
+ }
+ if (status & RXBD_NONOCTET) {
+ stats->rx_frame_errors++;
+ estats->rx_nonoctet++;
+ }
+ if (status & RXBD_CRCERR) {
+ estats->rx_crcerr++;
+ stats->rx_crc_errors++;
+ }
+ if (status & RXBD_OVERRUN) {
+ estats->rx_overrun++;
+ stats->rx_crc_errors++;
+ }
+}
+
+irqreturn_t gfar_receive(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct gfar_private *priv = netdev_priv(dev);
+
+#ifdef CONFIG_GFAR_NAPI
+ u32 tempval;
+#endif
+
+ /* Clear IEVENT, so rx interrupt isn't called again
+ * because of this interrupt */
+ gfar_write(&priv->regs->ievent, IEVENT_RX_MASK);
+
+ /* support NAPI */
+#ifdef CONFIG_GFAR_NAPI
+ if (netif_rx_schedule_prep(dev)) {
+ tempval = gfar_read(&priv->regs->imask);
+ tempval &= IMASK_RX_DISABLED;
+ gfar_write(&priv->regs->imask, tempval);
+
+ __netif_rx_schedule(dev);
+ } else {
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n",
+ dev->name, gfar_read(priv->regs->ievent),
+ gfar_read(priv->regs->imask));
+#endif
+ }
+#else
+
+ spin_lock(&priv->lock);
+ gfar_clean_rx_ring(dev);
+
+ /* If we are coalescing interrupts, update the timer */
+ /* Otherwise, clear it */
+ if (priv->rxcoalescing)
+ gfar_write(&priv->regs->rxic,
+ mk_ic_value(priv->rxcount, priv->rxtime));
+ else
+ gfar_write(&priv->regs->rxic, 0);
+
+ /* Just in case we need to wake the ring param changer */
+ priv->rxclean = 1;
+
+ spin_unlock(&priv->lock);
+#endif
+
+ return IRQ_HANDLED;
+}
+
+
+/* gfar_process_frame() -- handle one incoming packet if skb
+ * isn't NULL. Try the fastroute before using the stack */
+static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
+ int length)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+
+ if (skb == NULL) {
+#ifdef BRIEF_GFAR_ERRORS
+ printk(KERN_WARNING "%s: Missing skb!!.\n",
+ dev->name);
+#endif
+ priv->stats.rx_dropped++;
+ priv->extra_stats.rx_skbmissing++;
+ } else {
+ if(try_fastroute(skb, dev, length) == 0) {
+ /* Prep the skb for the packet */
+ skb_put(skb, length);
+
+ /* Tell the skb what kind of packet this is */
+ skb->protocol = eth_type_trans(skb, dev);
+
+ /* Send the packet up the stack */
+ if (RECEIVE(skb) == NET_RX_DROP) {
+ priv->extra_stats.kernel_dropped++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/* gfar_clean_rx_ring() -- Processes each frame in the rx ring
+ * until all are gone (or, in the case of NAPI, the budget/quota
+ * has been reached). Returns the number of frames handled
+ */
+#ifdef CONFIG_GFAR_NAPI
+static int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit)
+#else
+static int gfar_clean_rx_ring(struct net_device *dev)
+#endif
+{
+ struct rxbd8 *bdp;
+ struct sk_buff *skb;
+ u16 pkt_len;
+ int howmany = 0;
+ struct gfar_private *priv = netdev_priv(dev);
+
+ /* Get the first full descriptor */
+ bdp = priv->cur_rx;
+
+#ifdef CONFIG_GFAR_NAPI
+#define GFAR_RXDONE() ((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))
+#else
+#define GFAR_RXDONE() (bdp->status & RXBD_EMPTY)
+#endif
+ while (!GFAR_RXDONE()) {
+ skb = priv->rx_skbuff[priv->skb_currx];
+
+ if (!(bdp->status &
+ (RXBD_LARGE | RXBD_SHORT | RXBD_NONOCTET
+ | RXBD_CRCERR | RXBD_OVERRUN | RXBD_TRUNCATED))) {
+ /* Increment the number of packets */
+ priv->stats.rx_packets++;
+ howmany++;
+
+ /* Remove the FCS from the packet length */
+ pkt_len = bdp->length - 4;
+
+ gfar_process_frame(dev, skb, pkt_len);
+
+ priv->stats.rx_bytes += pkt_len;
+
+ } else {
+ count_errors(bdp->status, priv);
+
+ if (skb)
+ dev_kfree_skb_any(skb);
+
+ priv->rx_skbuff[priv->skb_currx] = NULL;
+ }
+
+ dev->last_rx = jiffies;
+
+ /* Clear the status flags for this buffer */
+ bdp->status &= ~RXBD_STATS;
+
+ /* Add another skb for the future */
+ skb = gfar_new_skb(dev, bdp);
+ priv->rx_skbuff[priv->skb_currx] = skb;
+
+ /* Update to the next pointer */
+ if (bdp->status & RXBD_WRAP)
+ bdp = priv->rx_bd_base;
+ else
+ bdp++;
+
+ /* update to point at the next skb */
+ priv->skb_currx =
+ (priv->skb_currx +
+ 1) & RX_RING_MOD_MASK(priv->rx_ring_size);
+
+ }
+
+ /* Update the current rxbd pointer to be the next one */
+ priv->cur_rx = bdp;
+
+ /* If no packets have arrived since the
+ * last one we processed, clear the IEVENT RX and
+ * BSY bits so that another interrupt won't be
+ * generated when we set IMASK */
+ if (bdp->status & RXBD_EMPTY)
+ gfar_write(&priv->regs->ievent, IEVENT_RX_MASK);
+
+ return howmany;
+}
+
+#ifdef CONFIG_GFAR_NAPI
+static int gfar_poll(struct net_device *dev, int *budget)
+{
+ int howmany;
+ struct gfar_private *priv = netdev_priv(dev);
+ int rx_work_limit = *budget;
+
+ if (rx_work_limit > dev->quota)
+ rx_work_limit = dev->quota;
+
+ spin_lock(&priv->lock);
+ howmany = gfar_clean_rx_ring(dev, rx_work_limit);
+
+ dev->quota -= howmany;
+ rx_work_limit -= howmany;
+ *budget -= howmany;
+
+ if (rx_work_limit >= 0) {
+ netif_rx_complete(dev);
+
+ /* Clear the halt bit in RSTAT */
+ gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
+
+ gfar_write(&priv->regs->imask, IMASK_DEFAULT);
+
+ /* If we are coalescing interrupts, update the timer */
+ /* Otherwise, clear it */
+ if (priv->rxcoalescing)
+ gfar_write(&priv->regs->rxic,
+ mk_ic_value(priv->rxcount, priv->rxtime));
+ else
+ gfar_write(&priv->regs->rxic, 0);
+
+ /* Signal to the ring size changer that it's safe to go */
+ priv->rxclean = 1;
+ }
+
+ spin_unlock(priv->lock);
+
+ return (rx_work_limit < 0) ? 1 : 0;
+}
+#endif
+
+/* The interrupt handler for devices with one interrupt */
+static irqreturn_t gfar_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = dev_id;
+ struct gfar_private *priv = netdev_priv(dev);
+
+ /* Save ievent for future reference */
+ u32 events = gfar_read(&priv->regs->ievent);
+
+ /* Clear IEVENT */
+ gfar_write(&priv->regs->ievent, events);
+
+ /* Check for reception */
+ if ((events & IEVENT_RXF0) || (events & IEVENT_RXB0))
+ gfar_receive(irq, dev_id, regs);
+
+ /* Check for transmit completion */
+ if ((events & IEVENT_TXF) || (events & IEVENT_TXB))
+ gfar_transmit(irq, dev_id, regs);
+
+ /* Update error statistics */
+ if (events & IEVENT_TXE) {
+ priv->stats.tx_errors++;
+
+ if (events & IEVENT_LC)
+ priv->stats.tx_window_errors++;
+ if (events & IEVENT_CRL)
+ priv->stats.tx_aborted_errors++;
+ if (events & IEVENT_XFUN) {
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_WARNING "%s: tx underrun. dropped packet\n",
+ dev->name);
+#endif
+ priv->stats.tx_dropped++;
+ priv->extra_stats.tx_underrun++;
+
+ /* Reactivate the Tx Queues */
+ gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
+ }
+ }
+ if (events & IEVENT_BSY) {
+ priv->stats.rx_errors++;
+ priv->extra_stats.rx_bsy++;
+
+ gfar_receive(irq, dev_id, regs);
+
+#ifndef CONFIG_GFAR_NAPI
+ /* Clear the halt bit in RSTAT */
+ gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
+#endif
+
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: busy error (rhalt: %x)\n", dev->name,
+ gfar_read(priv->regs->rstat));
+#endif
+ }
+ if (events & IEVENT_BABR) {
+ priv->stats.rx_errors++;
+ priv->extra_stats.rx_babr++;
+
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: babbling error\n", dev->name);
+#endif
+ }
+ if (events & IEVENT_EBERR) {
+ priv->extra_stats.eberr++;
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: EBERR\n", dev->name);
+#endif
+ }
+ if (events & IEVENT_RXC) {
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: control frame\n", dev->name);
+#endif
+ }
+
+ if (events & IEVENT_BABT) {
+ priv->extra_stats.tx_babt++;
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: babt error\n", dev->name);
+#endif
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t phy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct gfar_private *priv = netdev_priv(dev);
+
+ /* Run the commands which acknowledge the interrupt */
+ phy_run_commands(dev, priv->phyinfo->ack_int);
+
+ /* Schedule the bottom half */
+ schedule_work(&priv->tq);
+
+ return IRQ_HANDLED;
+}
+
+/* Scheduled by the phy_interrupt/timer to handle PHY changes */
+static void gfar_phy_change(void *data)
+{
+ struct net_device *dev = (struct net_device *) data;
+ struct gfar_private *priv = netdev_priv(dev);
+ int timeout = HZ / 1000 + 1;
+
+ /* Delay to give the PHY a chance to change the
+ * register state */
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(timeout);
+
+ /* Run the commands which check the link state */
+ phy_run_commands(dev, priv->phyinfo->handle_int);
+
+ /* React to the change in state */
+ adjust_link(dev);
+}
+
+/* Called every so often on systems that don't interrupt
+ * the core for PHY changes */
+static void gfar_phy_timer(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *) data;
+ struct gfar_private *priv = netdev_priv(dev);
+
+ schedule_work(&priv->tq);
+
+ mod_timer(&priv->phy_info_timer, jiffies + 2 * HZ);
+}
+
+/* Called every time the controller might need to be made
+ * aware of new link state. The PHY code conveys this
+ * information through variables in the priv structure, and this
+ * function converts those variables into the appropriate
+ * register values, and can bring down the device if needed.
+ */
+static void adjust_link(struct net_device *dev)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+ struct gfar *regs = priv->regs;
+ u32 tempval;
+
+ if (priv->link) {
+ /* Now we make sure that we can be in full duplex mode.
+ * If not, we operate in half-duplex mode. */
+ if (priv->duplexity != priv->olddplx) {
+ if (!(priv->duplexity)) {
+ tempval = gfar_read(®s->maccfg2);
+ tempval &= ~(MACCFG2_FULL_DUPLEX);
+ gfar_write(®s->maccfg2, tempval);
+
+ printk(KERN_INFO "%s: Half Duplex\n",
+ dev->name);
+ } else {
+ tempval = gfar_read(®s->maccfg2);
+ tempval |= MACCFG2_FULL_DUPLEX;
+ gfar_write(®s->maccfg2, tempval);
+
+ printk(KERN_INFO "%s: Full Duplex\n",
+ dev->name);
+ }
+
+ priv->olddplx = priv->duplexity;
+ }
+
+ if (priv->speed != priv->oldspeed) {
+ switch (priv->speed) {
+ case 1000:
+ tempval = gfar_read(®s->maccfg2);
+ tempval =
+ ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
+ gfar_write(®s->maccfg2, tempval);
+ break;
+ case 100:
+ case 10:
+ tempval = gfar_read(®s->maccfg2);
+ tempval =
+ ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
+ gfar_write(®s->maccfg2, tempval);
+ break;
+ default:
+ printk(KERN_WARNING
+ "%s: Ack! Speed (%d) is not 10/100/1000!\n",
+ dev->name, priv->speed);
+ break;
+ }
+
+ printk(KERN_INFO "%s: Speed %dBT\n", dev->name,
+ priv->speed);
+
+ priv->oldspeed = priv->speed;
+ }
+
+ if (!priv->oldlink) {
+ printk(KERN_INFO "%s: Link is up\n", dev->name);
+ priv->oldlink = 1;
+ netif_carrier_on(dev);
+ netif_schedule(dev);
+ }
+ } else {
+ if (priv->oldlink) {
+ printk(KERN_INFO "%s: Link is down\n", dev->name);
+ priv->oldlink = 0;
+ priv->oldspeed = 0;
+ priv->olddplx = -1;
+ netif_carrier_off(dev);
+ }
+ }
+}
+
+
+/* Update the hash table based on the current list of multicast
+ * addresses we subscribe to. Also, change the promiscuity of
+ * the device based on the flags (this function is called
+ * whenever dev->flags is changed */
+static void gfar_set_multi(struct net_device *dev)
+{
+ struct dev_mc_list *mc_ptr;
+ struct gfar_private *priv = netdev_priv(dev);
+ struct gfar *regs = priv->regs;
+ u32 tempval;
+
+ if(dev->flags & IFF_PROMISC) {
+ printk(KERN_INFO "%s: Entering promiscuous mode.\n",
+ dev->name);
+ /* Set RCTRL to PROM */
+ tempval = gfar_read(®s->rctrl);
+ tempval |= RCTRL_PROM;
+ gfar_write(®s->rctrl, tempval);
+ } else {
+ /* Set RCTRL to not PROM */
+ tempval = gfar_read(®s->rctrl);
+ tempval &= ~(RCTRL_PROM);
+ gfar_write(®s->rctrl, tempval);
+ }
+
+ if(dev->flags & IFF_ALLMULTI) {
+ /* Set the hash to rx all multicast frames */
+ gfar_write(®s->gaddr0, 0xffffffff);
+ gfar_write(®s->gaddr1, 0xffffffff);
+ gfar_write(®s->gaddr2, 0xffffffff);
+ gfar_write(®s->gaddr3, 0xffffffff);
+ gfar_write(®s->gaddr4, 0xffffffff);
+ gfar_write(®s->gaddr5, 0xffffffff);
+ gfar_write(®s->gaddr6, 0xffffffff);
+ gfar_write(®s->gaddr7, 0xffffffff);
+ } else {
+ /* zero out the hash */
+ gfar_write(®s->gaddr0, 0x0);
+ gfar_write(®s->gaddr1, 0x0);
+ gfar_write(®s->gaddr2, 0x0);
+ gfar_write(®s->gaddr3, 0x0);
+ gfar_write(®s->gaddr4, 0x0);
+ gfar_write(®s->gaddr5, 0x0);
+ gfar_write(®s->gaddr6, 0x0);
+ gfar_write(®s->gaddr7, 0x0);
+
+ if(dev->mc_count == 0)
+ return;
+
+ /* Parse the list, and set the appropriate bits */
+ for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
+ gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr);
+ }
+ }
+
+ return;
+}
+
+/* Set the appropriate hash bit for the given addr */
+/* The algorithm works like so:
+ * 1) Take the Destination Address (ie the multicast address), and
+ * do a CRC on it (little endian), and reverse the bits of the
+ * result.
+ * 2) Use the 8 most significant bits as a hash into a 256-entry
+ * table. The table is controlled through 8 32-bit registers:
+ * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is
+ * gaddr7. This means that the 3 most significant bits in the
+ * hash index which gaddr register to use, and the 5 other bits
+ * indicate which bit (assuming an IBM numbering scheme, which
+ * for PowerPC (tm) is usually the case) in the register holds
+ * the entry. */
+static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
+{
+ u32 tempval;
+ struct gfar_private *priv = netdev_priv(dev);
+ struct gfar *regs = priv->regs;
+ u32 *hash = ®s->gaddr0;
+ u32 result = ether_crc(MAC_ADDR_LEN, addr);
+ u8 whichreg = ((result >> 29) & 0x7);
+ u8 whichbit = ((result >> 24) & 0x1f);
+ u32 value = (1 << (31-whichbit));
+
+ tempval = gfar_read(&hash[whichreg]);
+ tempval |= value;
+ gfar_write(&hash[whichreg], tempval);
+
+ return;
+}
+
+/* GFAR error interrupt handler */
+static irqreturn_t gfar_error(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = dev_id;
+ struct gfar_private *priv = netdev_priv(dev);
+
+ /* Save ievent for future reference */
+ u32 events = gfar_read(&priv->regs->ievent);
+
+ /* Clear IEVENT */
+ gfar_write(&priv->regs->ievent, IEVENT_ERR_MASK);
+
+ /* Hmm... */
+#if defined (BRIEF_GFAR_ERRORS) || defined (VERBOSE_GFAR_ERRORS)
+ printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n",
+ dev->name, events, gfar_read(priv->regs->imask));
+#endif
+
+ /* Update the error counters */
+ if (events & IEVENT_TXE) {
+ priv->stats.tx_errors++;
+
+ if (events & IEVENT_LC)
+ priv->stats.tx_window_errors++;
+ if (events & IEVENT_CRL)
+ priv->stats.tx_aborted_errors++;
+ if (events & IEVENT_XFUN) {
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: underrun. packet dropped.\n",
+ dev->name);
+#endif
+ priv->stats.tx_dropped++;
+ priv->extra_stats.tx_underrun++;
+
+ /* Reactivate the Tx Queues */
+ gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
+ }
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: Transmit Error\n", dev->name);
+#endif
+ }
+ if (events & IEVENT_BSY) {
+ priv->stats.rx_errors++;
+ priv->extra_stats.rx_bsy++;
+
+ gfar_receive(irq, dev_id, regs);
+
+#ifndef CONFIG_GFAR_NAPI
+ /* Clear the halt bit in RSTAT */
+ gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
+#endif
+
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: busy error (rhalt: %x)\n", dev->name,
+ gfar_read(priv->regs->rstat));
+#endif
+ }
+ if (events & IEVENT_BABR) {
+ priv->stats.rx_errors++;
+ priv->extra_stats.rx_babr++;
+
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: babbling error\n", dev->name);
+#endif
+ }
+ if (events & IEVENT_EBERR) {
+ priv->extra_stats.eberr++;
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: EBERR\n", dev->name);
+#endif
+ }
+ if (events & IEVENT_RXC)
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: control frame\n", dev->name);
+#endif
+
+ if (events & IEVENT_BABT) {
+ priv->extra_stats.tx_babt++;
+#ifdef VERBOSE_GFAR_ERRORS
+ printk(KERN_DEBUG "%s: babt error\n", dev->name);
+#endif
+ }
+ return IRQ_HANDLED;
+}
+
+/* Structure for a device driver */
+static struct ocp_device_id gfar_ids[] = {
+ {.vendor = OCP_ANY_ID,.function = OCP_FUNC_GFAR},
+ {.vendor = OCP_VENDOR_INVALID}
+};
+
+static struct ocp_driver gfar_driver = {
+ .name = "gianfar",
+ .id_table = gfar_ids,
+
+ .probe = gfar_probe,
+ .remove = gfar_remove,
+};
+
+static int __init gfar_init(void)
+{
+ int rc;
+
+ rc = ocp_register_driver(&gfar_driver);
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,41)
+ if (rc != 0) {
+#else
+ if (rc == 0) {
+#endif
+ ocp_unregister_driver(&gfar_driver);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void __exit gfar_exit(void)
+{
+ ocp_unregister_driver(&gfar_driver);
+}
+
+module_init(gfar_init);
+module_exit(gfar_exit);
diff -Nru a/drivers/net/gianfar.h b/drivers/net/gianfar.h
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/net/gianfar.h 2004-06-28 10:16:57 -05:00
@@ -0,0 +1,537 @@
+/*
+ * drivers/net/gianfar.h
+ *
+ * Gianfar Ethernet Driver
+ * Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
+ * Based on 8260_io/fcc_enet.c
+ *
+ * Author: Andy Fleming
+ * Maintainer: Kumar Gala (kumar.gala@freescale.com)
+ *
+ * Copyright 2004 Freescale Semiconductor, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Still left to do:
+ * -Add support for module parameters
+ */
+#ifndef __GIANFAR_H
+#define __GIANFAR_H
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/crc32.h>
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,41)
+#include <linux/workqueue.h>
+#else
+#include <linux/tqueue.h>
+#define work_struct tq_struct
+#define schedule_work schedule_task
+#endif
+
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+#include <asm/ocp.h>
+#include "gianfar_phy.h"
+
+/* The maximum number of packets to be handled in one call of gfar_poll */
+#define GFAR_DEV_WEIGHT 64
+
+/* Number of bytes to align the rx bufs to */
+#define RXBUF_ALIGNMENT 64
+
+/* The number of bytes which composes a unit for the purpose of
+ * allocating data buffers. ie-for any given MTU, the data buffer
+ * will be the next highest multiple of 512 bytes. */
+#define INCREMENTAL_BUFFER_SIZE 512
+
+
+#define MAC_ADDR_LEN 6
+
+extern char gfar_driver_name[];
+extern char gfar_driver_version[];
+
+/* These need to be powers of 2 for this driver */
+#ifdef CONFIG_GFAR_NAPI
+#define DEFAULT_TX_RING_SIZE 256
+#define DEFAULT_RX_RING_SIZE 256
+#else
+#define DEFAULT_TX_RING_SIZE 64
+#define DEFAULT_RX_RING_SIZE 64
+#endif
+
+#define GFAR_RX_MAX_RING_SIZE 256
+#define GFAR_TX_MAX_RING_SIZE 256
+
+#define DEFAULT_RX_BUFFER_SIZE 1536
+#define TX_RING_MOD_MASK(size) (size-1)
+#define RX_RING_MOD_MASK(size) (size-1)
+#define JUMBO_BUFFER_SIZE 9728
+#define JUMBO_FRAME_SIZE 9600
+
+/* Latency of interface clock in nanoseconds */
+/* Interface clock latency , in this case, means the
+ * time described by a value of 1 in the interrupt
+ * coalescing registers' time fields. Since those fields
+ * refer to the time it takes for 64 clocks to pass, the
+ * latencies are as such:
+ * GBIT = 125MHz => 8ns/clock => 8*64 ns / tick
+ * 100 = 25 MHz => 40ns/clock => 40*64 ns / tick
+ * 10 = 2.5 MHz => 400ns/clock => 400*64 ns / tick
+ */
+#define GFAR_GBIT_TIME 512
+#define GFAR_100_TIME 2560
+#define GFAR_10_TIME 25600
+
+#define DEFAULT_TXCOUNT 16
+#define DEFAULT_TXTIME 32768
+
+#define DEFAULT_RXCOUNT 16
+#define DEFAULT_RXTIME 32768
+
+#define TBIPA_VALUE 0x1f
+#define MIIMCFG_INIT_VALUE 0x00000007
+#define MIIMCFG_RESET 0x80000000
+#define MIIMIND_BUSY 0x00000001
+
+/* MAC register bits */
+#define MACCFG1_SOFT_RESET 0x80000000
+#define MACCFG1_RESET_RX_MC 0x00080000
+#define MACCFG1_RESET_TX_MC 0x00040000
+#define MACCFG1_RESET_RX_FUN 0x00020000
+#define MACCFG1_RESET_TX_FUN 0x00010000
+#define MACCFG1_LOOPBACK 0x00000100
+#define MACCFG1_RX_FLOW 0x00000020
+#define MACCFG1_TX_FLOW 0x00000010
+#define MACCFG1_SYNCD_RX_EN 0x00000008
+#define MACCFG1_RX_EN 0x00000004
+#define MACCFG1_SYNCD_TX_EN 0x00000002
+#define MACCFG1_TX_EN 0x00000001
+
+#define MACCFG2_INIT_SETTINGS 0x00007205
+#define MACCFG2_FULL_DUPLEX 0x00000001
+#define MACCFG2_IF 0x00000300
+#define MACCFG2_MII 0x00000100
+#define MACCFG2_GMII 0x00000200
+#define MACCFG2_HUGEFRAME 0x00000020
+#define MACCFG2_LENGTHCHECK 0x00000010
+
+#define ECNTRL_INIT_SETTINGS 0x00001000
+#define ECNTRL_TBI_MODE 0x00000020
+
+#define MRBLR_INIT_SETTINGS DEFAULT_RX_BUFFER_SIZE
+
+#define MINFLR_INIT_SETTINGS 0x00000040
+
+/* Init to do tx snooping for buffers and descriptors */
+#define DMACTRL_INIT_SETTINGS 0x000000c3
+#define DMACTRL_GRS 0x00000010
+#define DMACTRL_GTS 0x00000008
+
+#define TSTAT_CLEAR_THALT 0x80000000
+
+/* Interrupt coalescing macros */
+#define IC_ICEN 0x80000000
+#define IC_ICFT_MASK 0x1fe00000
+#define IC_ICFT_SHIFT 21
+#define mk_ic_icft(x) \
+ (((unsigned int)x << IC_ICFT_SHIFT)&IC_ICFT_MASK)
+#define IC_ICTT_MASK 0x0000ffff
+#define mk_ic_ictt(x) (x&IC_ICTT_MASK)
+
+#define mk_ic_value(count, time) (IC_ICEN | \
+ mk_ic_icft(count) | \
+ mk_ic_ictt(time))
+
+#define RCTRL_PROM 0x00000008
+#define RSTAT_CLEAR_RHALT 0x00800000
+
+#define IEVENT_INIT_CLEAR 0xffffffff
+#define IEVENT_BABR 0x80000000
+#define IEVENT_RXC 0x40000000
+#define IEVENT_BSY 0x20000000
+#define IEVENT_EBERR 0x10000000
+#define IEVENT_MSRO 0x04000000
+#define IEVENT_GTSC 0x02000000
+#define IEVENT_BABT 0x01000000
+#define IEVENT_TXC 0x00800000
+#define IEVENT_TXE 0x00400000
+#define IEVENT_TXB 0x00200000
+#define IEVENT_TXF 0x00100000
+#define IEVENT_LC 0x00040000
+#define IEVENT_CRL 0x00020000
+#define IEVENT_XFUN 0x00010000
+#define IEVENT_RXB0 0x00008000
+#define IEVENT_GRSC 0x00000100
+#define IEVENT_RXF0 0x00000080
+#define IEVENT_RX_MASK (IEVENT_RXB0 | IEVENT_RXF0)
+#define IEVENT_TX_MASK (IEVENT_TXB | IEVENT_TXF)
+#define IEVENT_ERR_MASK \
+(IEVENT_RXC | IEVENT_BSY | IEVENT_EBERR | IEVENT_MSRO | \
+ IEVENT_BABT | IEVENT_TXC | IEVENT_TXE | IEVENT_LC \
+ | IEVENT_CRL | IEVENT_XFUN)
+
+#define IMASK_INIT_CLEAR 0x00000000
+#define IMASK_BABR 0x80000000
+#define IMASK_RXC 0x40000000
+#define IMASK_BSY 0x20000000
+#define IMASK_EBERR 0x10000000
+#define IMASK_MSRO 0x04000000
+#define IMASK_GRSC 0x02000000
+#define IMASK_BABT 0x01000000
+#define IMASK_TXC 0x00800000
+#define IMASK_TXEEN 0x00400000
+#define IMASK_TXBEN 0x00200000
+#define IMASK_TXFEN 0x00100000
+#define IMASK_LC 0x00040000
+#define IMASK_CRL 0x00020000
+#define IMASK_XFUN 0x00010000
+#define IMASK_RXB0 0x00008000
+#define IMASK_GTSC 0x00000100
+#define IMASK_RXFEN0 0x00000080
+#define IMASK_RX_DISABLED ~(IMASK_RXFEN0 | IMASK_BSY)
+#define IMASK_DEFAULT (IMASK_TXEEN | IMASK_TXFEN | IMASK_TXBEN | \
+ IMASK_RXFEN0 | IMASK_BSY | IMASK_EBERR | IMASK_BABR | \
+ IMASK_XFUN | IMASK_RXC | IMASK_BABT)
+
+
+/* Attribute fields */
+
+/* This enables rx snooping for buffers and descriptors */
+#ifdef CONFIG_GFAR_BDSTASH
+#define ATTR_BDSTASH 0x00000800
+#else
+#define ATTR_BDSTASH 0x00000000
+#endif
+
+#ifdef CONFIG_GFAR_BUFSTASH
+#define ATTR_BUFSTASH 0x00004000
+#define STASH_LENGTH 64
+#else
+#define ATTR_BUFSTASH 0x00000000
+#endif
+
+#define ATTR_SNOOPING 0x000000c0
+#define ATTR_INIT_SETTINGS (ATTR_SNOOPING \
+ | ATTR_BDSTASH | ATTR_BUFSTASH)
+
+#define ATTRELI_INIT_SETTINGS 0x0
+
+
+/* TxBD status field bits */
+#define TXBD_READY 0x8000
+#define TXBD_PADCRC 0x4000
+#define TXBD_WRAP 0x2000
+#define TXBD_INTERRUPT 0x1000
+#define TXBD_LAST 0x0800
+#define TXBD_CRC 0x0400
+#define TXBD_DEF 0x0200
+#define TXBD_HUGEFRAME 0x0080
+#define TXBD_LATECOLLISION 0x0080
+#define TXBD_RETRYLIMIT 0x0040
+#define TXBD_RETRYCOUNTMASK 0x003c
+#define TXBD_UNDERRUN 0x0002
+
+/* RxBD status field bits */
+#define RXBD_EMPTY 0x8000
+#define RXBD_RO1 0x4000
+#define RXBD_WRAP 0x2000
+#define RXBD_INTERRUPT 0x1000
+#define RXBD_LAST 0x0800
+#define RXBD_FIRST 0x0400
+#define RXBD_MISS 0x0100
+#define RXBD_BROADCAST 0x0080
+#define RXBD_MULTICAST 0x0040
+#define RXBD_LARGE 0x0020
+#define RXBD_NONOCTET 0x0010
+#define RXBD_SHORT 0x0008
+#define RXBD_CRCERR 0x0004
+#define RXBD_OVERRUN 0x0002
+#define RXBD_TRUNCATED 0x0001
+#define RXBD_STATS 0x01ff
+
+struct txbd8
+{
+ u16 status; /* Status Fields */
+ u16 length; /* Buffer length */
+ u32 bufPtr; /* Buffer Pointer */
+};
+
+struct rxbd8
+{
+ u16 status; /* Status Fields */
+ u16 length; /* Buffer Length */
+ u32 bufPtr; /* Buffer Pointer */
+};
+
+struct rmon_mib
+{
+ u32 tr64; /* 0x.680 - Transmit and Receive 64-byte Frame Counter */
+ u32 tr127; /* 0x.684 - Transmit and Receive 65-127 byte Frame Counter */
+ u32 tr255; /* 0x.688 - Transmit and Receive 128-255 byte Frame Counter */
+ u32 tr511; /* 0x.68c - Transmit and Receive 256-511 byte Frame Counter */
+ u32 tr1k; /* 0x.690 - Transmit and Receive 512-1023 byte Frame Counter */
+ u32 trmax; /* 0x.694 - Transmit and Receive 1024-1518 byte Frame Counter */
+ u32 trmgv; /* 0x.698 - Transmit and Receive 1519-1522 byte Good VLAN Frame */
+ u32 rbyt; /* 0x.69c - Receive Byte Counter */
+ u32 rpkt; /* 0x.6a0 - Receive Packet Counter */
+ u32 rfcs; /* 0x.6a4 - Receive FCS Error Counter */
+ u32 rmca; /* 0x.6a8 - Receive Multicast Packet Counter */
+ u32 rbca; /* 0x.6ac - Receive Broadcast Packet Counter */
+ u32 rxcf; /* 0x.6b0 - Receive Control Frame Packet Counter */
+ u32 rxpf; /* 0x.6b4 - Receive Pause Frame Packet Counter */
+ u32 rxuo; /* 0x.6b8 - Receive Unknown OP Code Counter */
+ u32 raln; /* 0x.6bc - Receive Alignment Error Counter */
+ u32 rflr; /* 0x.6c0 - Receive Frame Length Error Counter */
+ u32 rcde; /* 0x.6c4 - Receive Code Error Counter */
+ u32 rcse; /* 0x.6c8 - Receive Carrier Sense Error Counter */
+ u32 rund; /* 0x.6cc - Receive Undersize Packet Counter */
+ u32 rovr; /* 0x.6d0 - Receive Oversize Packet Counter */
+ u32 rfrg; /* 0x.6d4 - Receive Fragments Counter */
+ u32 rjbr; /* 0x.6d8 - Receive Jabber Counter */
+ u32 rdrp; /* 0x.6dc - Receive Drop Counter */
+ u32 tbyt; /* 0x.6e0 - Transmit Byte Counter Counter */
+ u32 tpkt; /* 0x.6e4 - Transmit Packet Counter */
+ u32 tmca; /* 0x.6e8 - Transmit Multicast Packet Counter */
+ u32 tbca; /* 0x.6ec - Transmit Broadcast Packet Counter */
+ u32 txpf; /* 0x.6f0 - Transmit Pause Control Frame Counter */
+ u32 tdfr; /* 0x.6f4 - Transmit Deferral Packet Counter */
+ u32 tedf; /* 0x.6f8 - Transmit Excessive Deferral Packet Counter */
+ u32 tscl; /* 0x.6fc - Transmit Single Collision Packet Counter */
+ u32 tmcl; /* 0x.700 - Transmit Multiple Collision Packet Counter */
+ u32 tlcl; /* 0x.704 - Transmit Late Collision Packet Counter */
+ u32 txcl; /* 0x.708 - Transmit Excessive Collision Packet Counter */
+ u32 tncl; /* 0x.70c - Transmit Total Collision Counter */
+ u8 res1[4];
+ u32 tdrp; /* 0x.714 - Transmit Drop Frame Counter */
+ u32 tjbr; /* 0x.718 - Transmit Jabber Frame Counter */
+ u32 tfcs; /* 0x.71c - Transmit FCS Error Counter */
+ u32 txcf; /* 0x.720 - Transmit Control Frame Counter */
+ u32 tovr; /* 0x.724 - Transmit Oversize Frame Counter */
+ u32 tund; /* 0x.728 - Transmit Undersize Frame Counter */
+ u32 tfrg; /* 0x.72c - Transmit Fragments Frame Counter */
+ u32 car1; /* 0x.730 - Carry Register One */
+ u32 car2; /* 0x.734 - Carry Register Two */
+ u32 cam1; /* 0x.738 - Carry Mask Register One */
+ u32 cam2; /* 0x.73c - Carry Mask Register Two */
+};
+
+struct gfar_extra_stats {
+ u64 kernel_dropped;
+ u64 rx_large;
+ u64 rx_short;
+ u64 rx_nonoctet;
+ u64 rx_crcerr;
+ u64 rx_overrun;
+ u64 rx_bsy;
+ u64 rx_babr;
+ u64 rx_trunc;
+ u64 eberr;
+ u64 tx_babt;
+ u64 tx_underrun;
+ u64 rx_skbmissing;
+ u64 tx_timeout;
+};
+
+#define GFAR_RMON_LEN ((sizeof(struct rmon_mib) - 16)/sizeof(u32))
+#define GFAR_EXTRA_STATS_LEN (sizeof(struct gfar_extra_stats)/sizeof(u64))
+
+/* Number of stats in the stats structure (ignore car and cam regs)*/
+#define GFAR_STATS_LEN (GFAR_RMON_LEN + GFAR_EXTRA_STATS_LEN)
+
+#define GFAR_INFOSTR_LEN 32
+
+struct gfar_stats {
+ u64 extra[GFAR_EXTRA_STATS_LEN];
+ u64 rmon[GFAR_RMON_LEN];
+};
+
+
+struct gfar {
+ u8 res1[16];
+ u32 ievent; /* 0x.010 - Interrupt Event Register */
+ u32 imask; /* 0x.014 - Interrupt Mask Register */
+ u32 edis; /* 0x.018 - Error Disabled Register */
+ u8 res2[4];
+ u32 ecntrl; /* 0x.020 - Ethernet Control Register */
+ u32 minflr; /* 0x.024 - Minimum Frame Length Register */
+ u32 ptv; /* 0x.028 - Pause Time Value Register */
+ u32 dmactrl; /* 0x.02c - DMA Control Register */
+ u32 tbipa; /* 0x.030 - TBI PHY Address Register */
+ u8 res3[88];
+ u32 fifo_tx_thr; /* 0x.08c - FIFO transmit threshold register */
+ u8 res4[8];
+ u32 fifo_tx_starve; /* 0x.098 - FIFO transmit starve register */
+ u32 fifo_tx_starve_shutoff; /* 0x.09c - FIFO transmit starve shutoff register */
+ u8 res5[96];
+ u32 tctrl; /* 0x.100 - Transmit Control Register */
+ u32 tstat; /* 0x.104 - Transmit Status Register */
+ u8 res6[4];
+ u32 tbdlen; /* 0x.10c - Transmit Buffer Descriptor Data Length Register */
+ u32 txic; /* 0x.110 - Transmit Interrupt Coalescing Configuration Register */
+ u8 res7[16];
+ u32 ctbptr; /* 0x.124 - Current Transmit Buffer Descriptor Pointer Register */
+ u8 res8[92];
+ u32 tbptr; /* 0x.184 - Transmit Buffer Descriptor Pointer Low Register */
+ u8 res9[124];
+ u32 tbase; /* 0x.204 - Transmit Descriptor Base Address Register */
+ u8 res10[168];
+ u32 ostbd; /* 0x.2b0 - Out-of-Sequence Transmit Buffer Descriptor Register */
+ u32 ostbdp; /* 0x.2b4 - Out-of-Sequence Transmit Data Buffer Pointer Register */
+ u8 res11[72];
+ u32 rctrl; /* 0x.300 - Receive Control Register */
+ u32 rstat; /* 0x.304 - Receive Status Register */
+ u8 res12[4];
+ u32 rbdlen; /* 0x.30c - RxBD Data Length Register */
+ u32 rxic; /* 0x.310 - Receive Interrupt Coalescing Configuration Register */
+ u8 res13[16];
+ u32 crbptr; /* 0x.324 - Current Receive Buffer Descriptor Pointer */
+ u8 res14[24];
+ u32 mrblr; /* 0x.340 - Maximum Receive Buffer Length Register */
+ u8 res15[64];
+ u32 rbptr; /* 0x.384 - Receive Buffer Descriptor Pointer */
+ u8 res16[124];
+ u32 rbase; /* 0x.404 - Receive Descriptor Base Address */
+ u8 res17[248];
+ u32 maccfg1; /* 0x.500 - MAC Configuration 1 Register */
+ u32 maccfg2; /* 0x.504 - MAC Configuration 2 Register */
+ u32 ipgifg; /* 0x.508 - Inter Packet Gap/Inter Frame Gap Register */
+ u32 hafdup; /* 0x.50c - Half Duplex Register */
+ u32 maxfrm; /* 0x.510 - Maximum Frame Length Register */
+ u8 res18[12];
+ u32 miimcfg; /* 0x.520 - MII Management Configuration Register */
+ u32 miimcom; /* 0x.524 - MII Management Command Register */
+ u32 miimadd; /* 0x.528 - MII Management Address Register */
+ u32 miimcon; /* 0x.52c - MII Management Control Register */
+ u32 miimstat; /* 0x.530 - MII Management Status Register */
+ u32 miimind; /* 0x.534 - MII Management Indicator Register */
+ u8 res19[4];
+ u32 ifstat; /* 0x.53c - Interface Status Register */
+ u32 macstnaddr1; /* 0x.540 - Station Address Part 1 Register */
+ u32 macstnaddr2; /* 0x.544 - Station Address Part 2 Register */
+ u8 res20[312];
+ struct rmon_mib rmon;
+ u8 res21[192];
+ u32 iaddr0; /* 0x.800 - Indivdual address register 0 */
+ u32 iaddr1; /* 0x.804 - Indivdual address register 1 */
+ u32 iaddr2; /* 0x.808 - Indivdual address register 2 */
+ u32 iaddr3; /* 0x.80c - Indivdual address register 3 */
+ u32 iaddr4; /* 0x.810 - Indivdual address register 4 */
+ u32 iaddr5; /* 0x.814 - Indivdual address register 5 */
+ u32 iaddr6; /* 0x.818 - Indivdual address register 6 */
+ u32 iaddr7; /* 0x.81c - Indivdual address register 7 */
+ u8 res22[96];
+ u32 gaddr0; /* 0x.880 - Global address register 0 */
+ u32 gaddr1; /* 0x.884 - Global address register 1 */
+ u32 gaddr2; /* 0x.888 - Global address register 2 */
+ u32 gaddr3; /* 0x.88c - Global address register 3 */
+ u32 gaddr4; /* 0x.890 - Global address register 4 */
+ u32 gaddr5; /* 0x.894 - Global address register 5 */
+ u32 gaddr6; /* 0x.898 - Global address register 6 */
+ u32 gaddr7; /* 0x.89c - Global address register 7 */
+ u8 res23[856];
+ u32 attr; /* 0x.bf8 - Attributes Register */
+ u32 attreli; /* 0x.bfc - Attributes Extract Length and Extract Index Register */
+ u8 res24[1024];
+
+};
+
+/* Struct stolen almost completely (and shamelessly) from the FCC enet source
+ * (Ok, that's not so true anymore, but there is a family resemblence)
+ * The GFAR buffer descriptors track the ring buffers. The rx_bd_base
+ * and tx_bd_base always point to the currently available buffer.
+ * The dirty_tx tracks the current buffer that is being sent by the
+ * controller. The cur_tx and dirty_tx are equal under both completely
+ * empty and completely full conditions. The empty/ready indicator in
+ * the buffer descriptor determines the actual condition.
+ */
+struct gfar_private
+{
+ /* pointers to arrays of skbuffs for tx and rx */
+ struct sk_buff ** tx_skbuff;
+ struct sk_buff ** rx_skbuff;
+
+ /* indices pointing to the next free sbk in skb arrays */
+ u16 skb_curtx;
+ u16 skb_currx;
+
+ /* index of the first skb which hasn't been transmitted
+ * yet. */
+ u16 skb_dirtytx;
+
+ /* Configuration info for the coalescing features */
+ unsigned char txcoalescing;
+ unsigned short txcount;
+ unsigned short txtime;
+ unsigned char rxcoalescing;
+ unsigned short rxcount;
+ unsigned short rxtime;
+
+ /* GFAR addresses */
+ struct rxbd8 *rx_bd_base; /* Base addresses of Rx and Tx Buffers */
+ struct txbd8 *tx_bd_base;
+ struct rxbd8 *cur_rx; /* Next free rx ring entry */
+ struct txbd8 *cur_tx; /* Next free ring entry */
+ struct txbd8 *dirty_tx; /* The Ring entry to be freed. */
+ struct gfar *regs; /* Pointer to the GFAR memory mapped Registers */
+ struct phy_info *phyinfo;
+ struct gfar *phyregs;
+ struct work_struct tq;
+ struct timer_list phy_info_timer;
+ struct net_device_stats stats; /* linux network statistics */
+ struct gfar_extra_stats extra_stats;
+ spinlock_t lock;
+ unsigned int rx_buffer_size;
+ unsigned int rx_stash_size;
+ unsigned int tx_ring_size;
+ unsigned int rx_ring_size;
+ wait_queue_head_t rxcleanupq;
+ unsigned int rxclean;
+ int link; /* current link state */
+ int oldlink;
+ int duplexity; /* Indicates negotiated duplex state */
+ int olddplx;
+ int speed; /* Indicates negotiated speed */
+ int oldspeed;
+
+ /* Info structure initialized by board setup code */
+ struct ocp_gfar_data *einfo;
+};
+
+extern inline u32 gfar_read(volatile unsigned *addr)
+{
+ u32 val;
+ val = in_be32(addr);
+ return val;
+}
+
+extern inline void gfar_write(volatile unsigned *addr, u32 val)
+{
+ out_be32(addr, val);
+}
+
+
+
+#endif /* __GIANFAR_H */
diff -Nru a/drivers/net/gianfar_ethtool.c b/drivers/net/gianfar_ethtool.c
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/net/gianfar_ethtool.c 2004-06-28 10:16:57 -05:00
@@ -0,0 +1,484 @@
+/*
+ * drivers/net/gianfar_ethtool.c
+ *
+ * Gianfar Ethernet Driver
+ * Ethtool support for Gianfar Enet
+ * Based on e1000 ethtool support
+ *
+ * Author: Andy Fleming
+ * Maintainer: Kumar Gala (kumar.gala@freescale.com)
+ *
+ * Copyright 2004 Freescale Semiconductor, Inc
+ *
+ * This software may be used and distributed according to
+ * the terms of the GNU Public License, Version 2, incorporated herein
+ * by reference.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/crc32.h>
+#include <asm/types.h>
+#include <asm/uaccess.h>
+#include <linux/ethtool.h>
+
+#include "gianfar.h"
+
+#define is_power_of_2(x) ((x) != 0 && (((x) & ((x) - 1)) == 0))
+
+extern int startup_gfar(struct net_device *dev);
+extern void stop_gfar(struct net_device *dev);
+extern void gfar_receive(int irq, void *dev_id, struct pt_regs *regs);
+
+void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
+ u64 * buf);
+void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
+int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
+int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
+void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
+int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
+void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
+
+static char stat_gstrings[][ETH_GSTRING_LEN] = {
+ "RX Dropped by Kernel",
+ "RX Large Frame Errors",
+ "RX Short Frame Errors",
+ "RX Non-Octet Errors",
+ "RX CRC Errors",
+ "RX Overrun Errors",
+ "RX Busy Errors",
+ "RX Babbling Errors",
+ "RX Truncated Frames",
+ "Ethernet Bus Error",
+ "TX Babbling Errors",
+ "TX Underrun Errors",
+ "RX SKB Missing Errors",
+ "TX Timeout Errors",
+ "tx&rx 64B frames",
+ "tx&rx 65-127B frames",
+ "tx&rx 128-255B frames",
+ "tx&rx 256-511B frames",
+ "tx&rx 512-1023B frames",
+ "tx&rx 1024-1518B frames",
+ "tx&rx 1519-1522B Good VLAN",
+ "RX bytes",
+ "RX Packets",
+ "RX FCS Errors",
+ "Receive Multicast Packet",
+ "Receive Broadcast Packet",
+ "RX Control Frame Packets",
+ "RX Pause Frame Packets",
+ "RX Unknown OP Code",
+ "RX Alignment Error",
+ "RX Frame Length Error",
+ "RX Code Error",
+ "RX Carrier Sense Error",
+ "RX Undersize Packets",
+ "RX Oversize Packets",
+ "RX Fragmented Frames",
+ "RX Jabber Frames",
+ "RX Dropped Frames",
+ "TX Byte Counter",
+ "TX Packets",
+ "TX Multicast Packets",
+ "TX Broadcast Packets",
+ "TX Pause Control Frames",
+ "TX Deferral Packets",
+ "TX Excessive Deferral Packets",
+ "TX Single Collision Packets",
+ "TX Multiple Collision Packets",
+ "TX Late Collision Packets",
+ "TX Excessive Collision Packets",
+ "TX Total Collision",
+ "RESERVED",
+ "TX Dropped Frames",
+ "TX Jabber Frames",
+ "TX FCS Errors",
+ "TX Control Frames",
+ "TX Oversize Frames",
+ "TX Undersize Frames",
+ "TX Fragmented Frames",
+};
+
+/* Fill in an array of 64-bit statistics from various sources.
+ * This array will be appended to the end of the ethtool_stats
+ * structure, and returned to user space
+ */
+void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
+{
+ int i;
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ u32 *rmon = (u32 *) & priv->regs->rmon;
+ u64 *extra = (u64 *) & priv->extra_stats;
+ struct gfar_stats *stats = (struct gfar_stats *) buf;
+
+ for (i = 0; i < GFAR_RMON_LEN; i++) {
+ stats->rmon[i] = (u64) (rmon[i]);
+ }
+
+ for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
+ stats->extra[i] = extra[i];
+ }
+}
+
+/* Returns the number of stats (and their corresponding strings) */
+int gfar_stats_count(struct net_device *dev)
+{
+ return GFAR_STATS_LEN;
+}
+
+void gfar_gstrings_normon(struct net_device *dev, u32 stringset, u8 * buf)
+{
+ memcpy(buf, stat_gstrings, GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
+}
+
+void gfar_fill_stats_normon(struct net_device *dev,
+ struct ethtool_stats *dummy, u64 * buf)
+{
+ int i;
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ u64 *extra = (u64 *) & priv->extra_stats;
+
+ for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
+ buf[i] = extra[i];
+ }
+}
+
+
+int gfar_stats_count_normon(struct net_device *dev)
+{
+ return GFAR_EXTRA_STATS_LEN;
+}
+/* Fills in the drvinfo structure with some basic info */
+void gfar_gdrvinfo(struct net_device *dev, struct
+ ethtool_drvinfo *drvinfo)
+{
+ strncpy(drvinfo->driver, gfar_driver_name, GFAR_INFOSTR_LEN);
+ strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
+ strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
+ strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
+ drvinfo->n_stats = GFAR_STATS_LEN;
+ drvinfo->testinfo_len = 0;
+ drvinfo->regdump_len = 0;
+ drvinfo->eedump_len = 0;
+}
+
+/* Return the current settings in the ethtool_cmd structure */
+int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ uint gigabit_support =
+ priv->einfo->flags & GFAR_HAS_GIGABIT ? SUPPORTED_1000baseT_Full : 0;
+ uint gigabit_advert =
+ priv->einfo->flags & GFAR_HAS_GIGABIT ? ADVERTISED_1000baseT_Full: 0;
+
+ cmd->supported = (SUPPORTED_10baseT_Half
+ | SUPPORTED_100baseT_Half
+ | SUPPORTED_100baseT_Full
+ | gigabit_support | SUPPORTED_Autoneg);
+
+ /* For now, we always advertise everything */
+ cmd->advertising = (ADVERTISED_10baseT_Half
+ | ADVERTISED_100baseT_Half
+ | ADVERTISED_100baseT_Full
+ | gigabit_advert | ADVERTISED_Autoneg);
+
+ cmd->speed = priv->speed;
+ cmd->duplex = priv->duplexity;
+ cmd->port = PORT_MII;
+ cmd->phy_address = priv->einfo->phyid;
+ cmd->transceiver = XCVR_EXTERNAL;
+ cmd->autoneg = AUTONEG_ENABLE;
+ cmd->maxtxpkt = priv->txcount;
+ cmd->maxrxpkt = priv->rxcount;
+
+ return 0;
+}
+
+/* Return the length of the register structure */
+int gfar_reglen(struct net_device *dev)
+{
+ return sizeof (struct gfar);
+}
+
+/* Return a dump of the GFAR register space */
+void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
+{
+ int i;
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ u32 *theregs = (u32 *) priv->regs;
+ u32 *buf = (u32 *) regbuf;
+
+ for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
+ buf[i] = theregs[i];
+}
+
+/* Return the link state 1 is up, 0 is down */
+u32 gfar_get_link(struct net_device *dev)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ return (u32) priv->link;
+}
+
+/* Fill in a buffer with the strings which correspond to the
+ * stats */
+void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
+{
+ memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
+}
+
+/* Convert microseconds to ethernet clock ticks, which changes
+ * depending on what speed the controller is running at */
+static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
+{
+ unsigned int count;
+
+ /* The timer is different, depending on the interface speed */
+ switch (priv->speed) {
+ case 1000:
+ count = GFAR_GBIT_TIME;
+ break;
+ case 100:
+ count = GFAR_100_TIME;
+ break;
+ case 10:
+ default:
+ count = GFAR_10_TIME;
+ break;
+ }
+
+ /* Make sure we return a number greater than 0
+ * if usecs > 0 */
+ return ((usecs * 1000 + count - 1) / count);
+}
+
+/* Convert ethernet clock ticks to microseconds */
+static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
+{
+ unsigned int count;
+
+ /* The timer is different, depending on the interface speed */
+ switch (priv->speed) {
+ case 1000:
+ count = GFAR_GBIT_TIME;
+ break;
+ case 100:
+ count = GFAR_100_TIME;
+ break;
+ case 10:
+ default:
+ count = GFAR_10_TIME;
+ break;
+ }
+
+ /* Make sure we return a number greater than 0 */
+ /* if ticks is > 0 */
+ return ((ticks * count) / 1000);
+}
+
+/* Get the coalescing parameters, and put them in the cvals
+ * structure. */
+int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+
+ cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
+ cvals->rx_max_coalesced_frames = priv->rxcount;
+
+ cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
+ cvals->tx_max_coalesced_frames = priv->txcount;
+
+ cvals->use_adaptive_rx_coalesce = 0;
+ cvals->use_adaptive_tx_coalesce = 0;
+
+ cvals->pkt_rate_low = 0;
+ cvals->rx_coalesce_usecs_low = 0;
+ cvals->rx_max_coalesced_frames_low = 0;
+ cvals->tx_coalesce_usecs_low = 0;
+ cvals->tx_max_coalesced_frames_low = 0;
+
+ /* When the packet rate is below pkt_rate_high but above
+ * pkt_rate_low (both measured in packets per second) the
+ * normal {rx,tx}_* coalescing parameters are used.
+ */
+
+ /* When the packet rate is (measured in packets per second)
+ * is above pkt_rate_high, the {rx,tx}_*_high parameters are
+ * used.
+ */
+ cvals->pkt_rate_high = 0;
+ cvals->rx_coalesce_usecs_high = 0;
+ cvals->rx_max_coalesced_frames_high = 0;
+ cvals->tx_coalesce_usecs_high = 0;
+ cvals->tx_max_coalesced_frames_high = 0;
+
+ /* How often to do adaptive coalescing packet rate sampling,
+ * measured in seconds. Must not be zero.
+ */
+ cvals->rate_sample_interval = 0;
+
+ return 0;
+}
+
+/* Change the coalescing values.
+ * Both cvals->*_usecs and cvals->*_frames have to be > 0
+ * in order for coalescing to be active
+ */
+int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+
+ /* Set up rx coalescing */
+ if ((cvals->rx_coalesce_usecs == 0) ||
+ (cvals->rx_max_coalesced_frames == 0))
+ priv->rxcoalescing = 0;
+ else
+ priv->rxcoalescing = 1;
+
+ priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
+ priv->rxcount = cvals->rx_max_coalesced_frames;
+
+ /* Set up tx coalescing */
+ if ((cvals->tx_coalesce_usecs == 0) ||
+ (cvals->tx_max_coalesced_frames == 0))
+ priv->txcoalescing = 0;
+ else
+ priv->txcoalescing = 1;
+
+ priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
+ priv->txcount = cvals->tx_max_coalesced_frames;
+
+ if (priv->rxcoalescing)
+ gfar_write(&priv->regs->rxic,
+ mk_ic_value(priv->rxcount, priv->rxtime));
+ else
+ gfar_write(&priv->regs->rxic, 0);
+
+ if (priv->txcoalescing)
+ gfar_write(&priv->regs->txic,
+ mk_ic_value(priv->txcount, priv->txtime));
+ else
+ gfar_write(&priv->regs->txic, 0);
+
+ return 0;
+}
+
+/* Fills in rvals with the current ring parameters. Currently,
+ * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
+ * jumbo are ignored by the driver */
+void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+
+ rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
+ rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
+ rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
+ rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
+
+ /* Values changeable by the user. The valid values are
+ * in the range 1 to the "*_max_pending" counterpart above.
+ */
+ rvals->rx_pending = priv->rx_ring_size;
+ rvals->rx_mini_pending = priv->rx_ring_size;
+ rvals->rx_jumbo_pending = priv->rx_ring_size;
+ rvals->tx_pending = priv->tx_ring_size;
+}
+
+/* Change the current ring parameters, stopping the controller if
+ * necessary so that we don't mess things up while we're in
+ * motion. We wait for the ring to be clean before reallocating
+ * the rings. */
+int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
+{
+ u32 tempval;
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ int err = 0;
+
+ if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
+ return -EINVAL;
+
+ if (!is_power_of_2(rvals->rx_pending)) {
+ printk("%s: Ring sizes must be a power of 2\n",
+ dev->name);
+ return -EINVAL;
+ }
+
+ if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
+ return -EINVAL;
+
+ if (!is_power_of_2(rvals->tx_pending)) {
+ printk("%s: Ring sizes must be a power of 2\n",
+ dev->name);
+ return -EINVAL;
+ }
+
+ /* Stop the controller so we don't rx any more frames */
+ /* But first, make sure we clear the bits */
+ tempval = gfar_read(&priv->regs->dmactrl);
+ tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
+ gfar_write(&priv->regs->dmactrl, tempval);
+
+ tempval = gfar_read(&priv->regs->dmactrl);
+ tempval |= (DMACTRL_GRS | DMACTRL_GTS);
+ gfar_write(&priv->regs->dmactrl, tempval);
+
+ while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)))
+ cpu_relax();
+
+ /* Note that rx is not clean right now */
+ priv->rxclean = 0;
+
+ if (dev->flags & IFF_UP) {
+ /* Tell the driver to process the rest of the frames */
+ gfar_receive(0, (void *) dev, NULL);
+
+ /* Now wait for it to be done */
+ wait_event_interruptible(priv->rxcleanupq, priv->rxclean);
+
+ /* Ok, all packets have been handled. Now we bring it down,
+ * change the ring size, and bring it up */
+
+ stop_gfar(dev);
+ }
+
+ priv->rx_ring_size = rvals->rx_pending;
+ priv->tx_ring_size = rvals->tx_pending;
+
+ if (dev->flags & IFF_UP)
+ err = startup_gfar(dev);
+
+ return err;
+}
+
+struct ethtool_ops gfar_ethtool_ops = {
+ .get_settings = gfar_gsettings,
+ .get_drvinfo = gfar_gdrvinfo,
+ .get_regs_len = gfar_reglen,
+ .get_regs = gfar_get_regs,
+ .get_link = gfar_get_link,
+ .get_coalesce = gfar_gcoalesce,
+ .set_coalesce = gfar_scoalesce,
+ .get_ringparam = gfar_gringparam,
+ .set_ringparam = gfar_sringparam,
+ .get_strings = gfar_gstrings,
+ .get_stats_count = gfar_stats_count,
+ .get_ethtool_stats = gfar_fill_stats,
+};
diff -Nru a/drivers/net/gianfar_phy.c b/drivers/net/gianfar_phy.c
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/net/gianfar_phy.c 2004-06-28 10:16:57 -05:00
@@ -0,0 +1,504 @@
+/*
+ * drivers/net/gianfar_phy.c
+ *
+ * Gianfar Ethernet Driver -- PHY handling
+ * Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
+ * Based on 8260_io/fcc_enet.c
+ *
+ * Author: Andy Fleming
+ * Maintainer: Kumar Gala (kumar.gala@freescale.com)
+ *
+ * Copyright 2004 Freescale Semiconductor, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/crc32.h>
+
+#include "gianfar.h"
+#include "gianfar_phy.h"
+
+/* Write value to the PHY for this device to the register at regnum, */
+/* waiting until the write is done before it returns. All PHY */
+/* configuration has to be done through the TSEC1 MIIM regs */
+void write_phy_reg(struct net_device *dev, u16 regnum, u16 value)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ struct gfar *regbase = priv->phyregs;
+ struct ocp_gfar_data *einfo = priv->einfo;
+
+ /* Set the PHY address and the register address we want to write */
+ gfar_write(®base->miimadd, ((einfo->phyid) << 8) | regnum);
+
+ /* Write out the value we want */
+ gfar_write(®base->miimcon, value);
+
+ /* Wait for the transaction to finish */
+ while (gfar_read(®base->miimind) & MIIMIND_BUSY)
+ cpu_relax();
+}
+
+/* Reads from register regnum in the PHY for device dev, */
+/* returning the value. Clears miimcom first. All PHY */
+/* configuration has to be done through the TSEC1 MIIM regs */
+u16 read_phy_reg(struct net_device *dev, u16 regnum)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ struct gfar *regbase = priv->phyregs;
+ struct ocp_gfar_data *einfo = priv->einfo;
+ u16 value;
+
+ /* Set the PHY address and the register address we want to read */
+ gfar_write(®base->miimadd, ((einfo->phyid) << 8) | regnum);
+
+ /* Clear miimcom, and then initiate a read */
+ gfar_write(®base->miimcom, 0);
+ gfar_write(®base->miimcom, MIIM_READ_COMMAND);
+
+ /* Wait for the transaction to finish */
+ while (gfar_read(®base->miimind) & (MIIMIND_NOTVALID | MIIMIND_BUSY))
+ cpu_relax();
+
+ /* Grab the value of the register from miimstat */
+ value = gfar_read(®base->miimstat);
+
+ return value;
+}
+
+/* returns which value to write to the control register. */
+/* For 10/100 the value is slightly different. */
+u16 mii_cr_init(u16 mii_reg, struct net_device * dev)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ struct ocp_gfar_data *einfo = priv->einfo;
+
+ if (einfo->flags & GFAR_HAS_GIGABIT)
+ return MIIM_CONTROL_INIT;
+ else
+ return MIIM_CR_INIT;
+}
+
+#define BRIEF_GFAR_ERRORS
+/* Wait for auto-negotiation to complete */
+u16 mii_parse_sr(u16 mii_reg, struct net_device * dev)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+
+ unsigned int timeout = GFAR_AN_TIMEOUT;
+
+ if (mii_reg & MIIM_STATUS_LINK)
+ priv->link = 1;
+ else
+ priv->link = 0;
+
+ /* Only auto-negotiate if the link has just gone up */
+ if (priv->link && !priv->oldlink) {
+ while ((!(mii_reg & MIIM_STATUS_AN_DONE)) && timeout--)
+ mii_reg = read_phy_reg(dev, MIIM_STATUS);
+
+#if defined(BRIEF_GFAR_ERRORS)
+ if (mii_reg & MIIM_STATUS_AN_DONE)
+ printk(KERN_INFO "%s: Auto-negotiation done\n",
+ dev->name);
+ else
+ printk(KERN_INFO "%s: Auto-negotiation timed out\n",
+ dev->name);
+#endif
+ }
+
+ return 0;
+}
+
+/* Determine the speed and duplex which was negotiated */
+u16 mii_parse_88E1011_psr(u16 mii_reg, struct net_device * dev)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ unsigned int speed;
+
+ if (priv->link) {
+ if (mii_reg & MIIM_88E1011_PHYSTAT_DUPLEX)
+ priv->duplexity = 1;
+ else
+ priv->duplexity = 0;
+
+ speed = (mii_reg & MIIM_88E1011_PHYSTAT_SPEED);
+
+ switch (speed) {
+ case MIIM_88E1011_PHYSTAT_GBIT:
+ priv->speed = 1000;
+ break;
+ case MIIM_88E1011_PHYSTAT_100:
+ priv->speed = 100;
+ break;
+ default:
+ priv->speed = 10;
+ break;
+ }
+ } else {
+ priv->speed = 0;
+ priv->duplexity = 0;
+ }
+
+ return 0;
+}
+
+u16 mii_parse_cis8201(u16 mii_reg, struct net_device * dev)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ unsigned int speed;
+
+ if (priv->link) {
+ if (mii_reg & MIIM_CIS8201_AUXCONSTAT_DUPLEX)
+ priv->duplexity = 1;
+ else
+ priv->duplexity = 0;
+
+ speed = mii_reg & MIIM_CIS8201_AUXCONSTAT_SPEED;
+
+ switch (speed) {
+ case MIIM_CIS8201_AUXCONSTAT_GBIT:
+ priv->speed = 1000;
+ break;
+ case MIIM_CIS8201_AUXCONSTAT_100:
+ priv->speed = 100;
+ break;
+ default:
+ priv->speed = 10;
+ break;
+ }
+ } else {
+ priv->speed = 0;
+ priv->duplexity = 0;
+ }
+
+ return 0;
+}
+
+u16 mii_parse_dm9161_scsr(u16 mii_reg, struct net_device * dev)
+{
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+
+ if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_100H))
+ priv->speed = 100;
+ else
+ priv->speed = 10;
+
+ if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_10F))
+ priv->duplexity = 1;
+ else
+ priv->duplexity = 0;
+
+ return 0;
+}
+
+u16 dm9161_wait(u16 mii_reg, struct net_device *dev)
+{
+ int timeout = HZ;
+ int secondary = 10;
+ u16 temp;
+
+ do {
+
+ /* Davicom takes a bit to come up after a reset,
+ * so wait here for a bit */
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(timeout);
+
+ temp = read_phy_reg(dev, MIIM_STATUS);
+
+ secondary--;
+ } while ((!(temp & MIIM_STATUS_AN_DONE)) && secondary);
+
+ return 0;
+}
+
+static struct phy_info phy_info_M88E1011S = {
+ 0x01410c6,
+ "Marvell 88E1011S",
+ 4,
+ (const struct phy_cmd[]) { /* config */
+ /* Reset and configure the PHY */
+ {MIIM_CONTROL, MIIM_CONTROL_INIT, mii_cr_init},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* startup */
+ /* Status is read once to clear old link state */
+ {MIIM_STATUS, miim_read, NULL},
+ /* Auto-negotiate */
+ {MIIM_STATUS, miim_read, mii_parse_sr},
+ /* Read the status */
+ {MIIM_88E1011_PHY_STATUS, miim_read, mii_parse_88E1011_psr},
+ /* Clear the IEVENT register */
+ {MIIM_88E1011_IEVENT, miim_read, NULL},
+ /* Set up the mask */
+ {MIIM_88E1011_IMASK, MIIM_88E1011_IMASK_INIT, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* ack_int */
+ /* Clear the interrupt */
+ {MIIM_88E1011_IEVENT, miim_read, NULL},
+ /* Disable interrupts */
+ {MIIM_88E1011_IMASK, MIIM_88E1011_IMASK_CLEAR, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* handle_int */
+ /* Read the Status (2x to make sure link is right) */
+ {MIIM_STATUS, miim_read, NULL},
+ /* Check the status */
+ {MIIM_STATUS, miim_read, mii_parse_sr},
+ {MIIM_88E1011_PHY_STATUS, miim_read, mii_parse_88E1011_psr},
+ /* Enable Interrupts */
+ {MIIM_88E1011_IMASK, MIIM_88E1011_IMASK_INIT, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* shutdown */
+ {MIIM_88E1011_IEVENT, miim_read, NULL},
+ {MIIM_88E1011_IMASK, MIIM_88E1011_IMASK_CLEAR, NULL},
+ {miim_end,}
+ },
+};
+
+/* Cicada 8204 */
+static struct phy_info phy_info_cis8204 = {
+ 0x3f11,
+ "Cicada Cis8204",
+ 6,
+ (const struct phy_cmd[]) { /* config */
+ /* Override PHY config settings */
+ {MIIM_CIS8201_AUX_CONSTAT, MIIM_CIS8201_AUXCONSTAT_INIT, NULL},
+ /* Set up the interface mode */
+ {MIIM_CIS8201_EXT_CON1, MIIM_CIS8201_EXTCON1_INIT, NULL},
+ /* Configure some basic stuff */
+ {MIIM_CONTROL, MIIM_CONTROL_INIT, mii_cr_init},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* startup */
+ /* Read the Status (2x to make sure link is right) */
+ {MIIM_STATUS, miim_read, NULL},
+ /* Auto-negotiate */
+ {MIIM_STATUS, miim_read, mii_parse_sr},
+ /* Read the status */
+ {MIIM_CIS8201_AUX_CONSTAT, miim_read, mii_parse_cis8201},
+ /* Clear the status register */
+ {MIIM_CIS8204_ISTAT, miim_read, NULL},
+ /* Enable interrupts */
+ {MIIM_CIS8204_IMASK, MIIM_CIS8204_IMASK_MASK, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* ack_int */
+ /* Clear the status register */
+ {MIIM_CIS8204_ISTAT, miim_read, NULL},
+ /* Disable interrupts */
+ {MIIM_CIS8204_IMASK, 0x0, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* handle_int */
+ /* Read the Status (2x to make sure link is right) */
+ {MIIM_STATUS, miim_read, NULL},
+ /* Auto-negotiate */
+ {MIIM_STATUS, miim_read, mii_parse_sr},
+ /* Read the status */
+ {MIIM_CIS8201_AUX_CONSTAT, miim_read, mii_parse_cis8201},
+ /* Enable interrupts */
+ {MIIM_CIS8204_IMASK, MIIM_CIS8204_IMASK_MASK, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* shutdown */
+ /* Clear the status register */
+ {MIIM_CIS8204_ISTAT, miim_read, NULL},
+ /* Disable interrupts */
+ {MIIM_CIS8204_IMASK, 0x0, NULL},
+ {miim_end,}
+ },
+};
+
+/* Cicada 8201 */
+static struct phy_info phy_info_cis8201 = {
+ 0xfc41,
+ "CIS8201",
+ 4,
+ (const struct phy_cmd[]) { /* config */
+ /* Override PHY config settings */
+ {MIIM_CIS8201_AUX_CONSTAT, MIIM_CIS8201_AUXCONSTAT_INIT, NULL},
+ /* Set up the interface mode */
+ {MIIM_CIS8201_EXT_CON1, MIIM_CIS8201_EXTCON1_INIT, NULL},
+ /* Configure some basic stuff */
+ {MIIM_CONTROL, MIIM_CONTROL_INIT, mii_cr_init},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* startup */
+ /* Read the Status (2x to make sure link is right) */
+ {MIIM_STATUS, miim_read, NULL},
+ /* Auto-negotiate */
+ {MIIM_STATUS, miim_read, mii_parse_sr},
+ /* Read the status */
+ {MIIM_CIS8201_AUX_CONSTAT, miim_read, mii_parse_cis8201},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* ack_int */
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* handle_int */
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* shutdown */
+ {miim_end,}
+ },
+};
+
+static struct phy_info phy_info_dm9161 = {
+ 0x0181b88,
+ "Davicom DM9161E",
+ 4,
+ (const struct phy_cmd[]) { /* config */
+ {MIIM_CONTROL, MIIM_DM9161_CR_STOP, NULL},
+ /* Do not bypass the scrambler/descrambler */
+ {MIIM_DM9161_SCR, MIIM_DM9161_SCR_INIT, NULL},
+ /* Clear 10BTCSR to default */
+ {MIIM_DM9161_10BTCSR, MIIM_DM9161_10BTCSR_INIT, NULL},
+ /* Configure some basic stuff */
+ {MIIM_CONTROL, MIIM_CR_INIT, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* startup */
+ /* Restart Auto Negotiation */
+ {MIIM_CONTROL, MIIM_DM9161_CR_RSTAN, NULL},
+ /* Status is read once to clear old link state */
+ {MIIM_STATUS, miim_read, dm9161_wait},
+ /* Auto-negotiate */
+ {MIIM_STATUS, miim_read, mii_parse_sr},
+ /* Read the status */
+ {MIIM_DM9161_SCSR, miim_read, mii_parse_dm9161_scsr},
+ /* Clear any pending interrupts */
+ {MIIM_DM9161_INTR, miim_read, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* ack_int */
+ {MIIM_DM9161_INTR, miim_read, NULL},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* handle_int */
+ {MIIM_STATUS, miim_read, NULL},
+ {MIIM_STATUS, miim_read, mii_parse_sr},
+ {MIIM_DM9161_SCSR, miim_read, mii_parse_dm9161_scsr},
+ {miim_end,}
+ },
+ (const struct phy_cmd[]) { /* shutdown */
+ {MIIM_DM9161_INTR, miim_read, NULL},
+ {miim_end,}
+ },
+};
+
+static struct phy_info *phy_info[] = {
+ &phy_info_cis8201,
+ &phy_info_cis8204,
+ &phy_info_M88E1011S,
+ &phy_info_dm9161,
+ NULL
+};
+
+/* Use the PHY ID registers to determine what type of PHY is attached
+ * to device dev. return a struct phy_info structure describing that PHY
+ */
+struct phy_info * get_phy_info(struct net_device *dev)
+{
+ u16 phy_reg;
+ u32 phy_ID;
+ int i;
+ struct phy_info *theInfo = NULL;
+
+ /* Grab the bits from PHYIR1, and put them in the upper half */
+ phy_reg = read_phy_reg(dev, MIIM_PHYIR1);
+ phy_ID = (phy_reg & 0xffff) << 16;
+
+ /* Grab the bits from PHYIR2, and put them in the lower half */
+ phy_reg = read_phy_reg(dev, MIIM_PHYIR2);
+ phy_ID |= (phy_reg & 0xffff);
+
+ /* loop through all the known PHY types, and find one that */
+ /* matches the ID we read from the PHY. */
+ for (i = 0; phy_info[i]; i++)
+ if (phy_info[i]->id == (phy_ID >> phy_info[i]->shift))
+ theInfo = phy_info[i];
+
+ if (theInfo == NULL) {
+ printk("%s: PHY id %x is not supported!\n", dev->name, phy_ID);
+ return NULL;
+ } else {
+ printk("%s: PHY is %s (%x)\n", dev->name, theInfo->name,
+ phy_ID);
+ }
+
+ return theInfo;
+}
+
+/* Take a list of struct phy_cmd, and, depending on the values, either */
+/* read or write, using a helper function if provided */
+/* It is assumed that all lists of struct phy_cmd will be terminated by */
+/* mii_end. */
+void phy_run_commands(struct net_device *dev, const struct phy_cmd *cmd)
+{
+ int i;
+ u16 result;
+ struct gfar_private *priv = (struct gfar_private *) dev->priv;
+ struct gfar *phyregs = priv->phyregs;
+
+ /* Reset the management interface */
+ gfar_write(&phyregs->miimcfg, MIIMCFG_RESET);
+
+ /* Setup the MII Mgmt clock speed */
+ gfar_write(&phyregs->miimcfg, MIIMCFG_INIT_VALUE);
+
+ /* Wait until the bus is free */
+ while (gfar_read(&phyregs->miimind) & MIIMIND_BUSY)
+ cpu_relax();
+
+ for (i = 0; cmd->mii_reg != miim_end; i++) {
+ /* The command is a read if mii_data is miim_read */
+ if (cmd->mii_data == miim_read) {
+ /* Read the value of the PHY reg */
+ result = read_phy_reg(dev, cmd->mii_reg);
+
+ /* If a function was supplied, we need to let it process */
+ /* the result. */
+ if (cmd->funct != NULL)
+ (*(cmd->funct)) (result, dev);
+ } else { /* Otherwise, it's a write */
+ /* If a function was supplied, it will provide
+ * the value to write */
+ /* Otherwise, the value was supplied in cmd->mii_data */
+ if (cmd->funct != NULL)
+ result = (*(cmd->funct)) (0, dev);
+ else
+ result = cmd->mii_data;
+
+ /* Write the appropriate value to the PHY reg */
+ write_phy_reg(dev, cmd->mii_reg, result);
+ }
+ cmd++;
+ }
+}
diff -Nru a/drivers/net/gianfar_phy.h b/drivers/net/gianfar_phy.h
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/drivers/net/gianfar_phy.h 2004-06-28 10:16:57 -05:00
@@ -0,0 +1,192 @@
+/*
+ * drivers/net/gianfar_phy.h
+ *
+ * Gianfar Ethernet Driver -- PHY handling
+ * Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
+ * Based on 8260_io/fcc_enet.c
+ *
+ * Author: Andy Fleming
+ * Maintainer: Kumar Gala (kumar.gala@freescale.com)
+ *
+ * Copyright 2004 Freescale Semiconductor, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+#ifndef __GIANFAR_PHY_H
+#define __GIANFAR_PHY_H
+
+#define miim_end ((u32)-2)
+#define miim_read ((u32)-1)
+
+#define MIIMIND_BUSY 0x00000001
+#define MIIMIND_NOTVALID 0x00000004
+
+#define MIIM_CONTROL 0x00
+#define MIIM_CONTROL_RESET 0x00008000
+#define MIIM_CONTROL_INIT 0x00001140
+#define MIIM_ANEN 0x00001000
+
+#define MIIM_CR 0x00
+#define MIIM_CR_RST 0x00008000
+#define MIIM_CR_INIT 0x00001000
+
+#define MIIM_STATUS 0x1
+#define MIIM_STATUS_AN_DONE 0x00000020
+#define MIIM_STATUS_LINK 0x0004
+
+#define MIIM_PHYIR1 0x2
+#define MIIM_PHYIR2 0x3
+
+#define GFAR_AN_TIMEOUT 0x000fffff
+
+#define MIIM_ANLPBPA 0x5
+#define MIIM_ANLPBPA_HALF 0x00000040
+#define MIIM_ANLPBPA_FULL 0x00000020
+
+#define MIIM_ANEX 0x6
+#define MIIM_ANEX_NP 0x00000004
+#define MIIM_ANEX_PRX 0x00000002
+
+
+/* Cicada Extended Control Register 1 */
+#define MIIM_CIS8201_EXT_CON1 0x17
+#define MIIM_CIS8201_EXTCON1_INIT 0x0000
+
+/* Cicada Interrupt Mask Register */
+#define MIIM_CIS8204_IMASK 0x19
+#define MIIM_CIS8204_IMASK_IEN 0x8000
+#define MIIM_CIS8204_IMASK_SPEED 0x4000
+#define MIIM_CIS8204_IMASK_LINK 0x2000
+#define MIIM_CIS8204_IMASK_DUPLEX 0x1000
+#define MIIM_CIS8204_IMASK_MASK 0xf000
+
+/* Cicada Interrupt Status Register */
+#define MIIM_CIS8204_ISTAT 0x1a
+#define MIIM_CIS8204_ISTAT_STATUS 0x8000
+#define MIIM_CIS8204_ISTAT_SPEED 0x4000
+#define MIIM_CIS8204_ISTAT_LINK 0x2000
+#define MIIM_CIS8204_ISTAT_DUPLEX 0x1000
+
+/* Cicada Auxiliary Control/Status Register */
+#define MIIM_CIS8201_AUX_CONSTAT 0x1c
+#define MIIM_CIS8201_AUXCONSTAT_INIT 0x0004
+#define MIIM_CIS8201_AUXCONSTAT_DUPLEX 0x0020
+#define MIIM_CIS8201_AUXCONSTAT_SPEED 0x0018
+#define MIIM_CIS8201_AUXCONSTAT_GBIT 0x0010
+#define MIIM_CIS8201_AUXCONSTAT_100 0x0008
+
+/* 88E1011 PHY Status Register */
+#define MIIM_88E1011_PHY_STATUS 0x11
+#define MIIM_88E1011_PHYSTAT_SPEED 0xc000
+#define MIIM_88E1011_PHYSTAT_GBIT 0x8000
+#define MIIM_88E1011_PHYSTAT_100 0x4000
+#define MIIM_88E1011_PHYSTAT_DUPLEX 0x2000
+#define MIIM_88E1011_PHYSTAT_LINK 0x0400
+
+#define MIIM_88E1011_IEVENT 0x13
+#define MIIM_88E1011_IEVENT_CLEAR 0x0000
+
+#define MIIM_88E1011_IMASK 0x12
+#define MIIM_88E1011_IMASK_INIT 0x6400
+#define MIIM_88E1011_IMASK_CLEAR 0x0000
+
+/* DM9161 Control register values */
+#define MIIM_DM9161_CR_STOP 0x0400
+#define MIIM_DM9161_CR_RSTAN 0x1200
+
+#define MIIM_DM9161_SCR 0x10
+#define MIIM_DM9161_SCR_INIT 0x0610
+
+/* DM9161 Specified Configuration and Status Register */
+#define MIIM_DM9161_SCSR 0x11
+#define MIIM_DM9161_SCSR_100F 0x8000
+#define MIIM_DM9161_SCSR_100H 0x4000
+#define MIIM_DM9161_SCSR_10F 0x2000
+#define MIIM_DM9161_SCSR_10H 0x1000
+
+/* DM9161 Interrupt Register */
+#define MIIM_DM9161_INTR 0x15
+#define MIIM_DM9161_INTR_PEND 0x8000
+#define MIIM_DM9161_INTR_DPLX_MASK 0x0800
+#define MIIM_DM9161_INTR_SPD_MASK 0x0400
+#define MIIM_DM9161_INTR_LINK_MASK 0x0200
+#define MIIM_DM9161_INTR_MASK 0x0100
+#define MIIM_DM9161_INTR_DPLX_CHANGE 0x0010
+#define MIIM_DM9161_INTR_SPD_CHANGE 0x0008
+#define MIIM_DM9161_INTR_LINK_CHANGE 0x0004
+#define MIIM_DM9161_INTR_INIT 0x0000
+#define MIIM_DM9161_INTR_STOP \
+(MIIM_DM9161_INTR_DPLX_MASK | MIIM_DM9161_INTR_SPD_MASK \
+ | MIIM_DM9161_INTR_LINK_MASK | MIIM_DM9161_INTR_MASK)
+
+/* DM9161 10BT Configuration/Status */
+#define MIIM_DM9161_10BTCSR 0x12
+#define MIIM_DM9161_10BTCSR_INIT 0x7800
+
+
+#define MIIM_READ_COMMAND 0x00000001
+
+/*
+ * struct phy_cmd: A command for reading or writing a PHY register
+ *
+ * mii_reg: The register to read or write
+ *
+ * mii_data: For writes, the value to put in the register.
+ * A value of -1 indicates this is a read.
+ *
+ * funct: A function pointer which is invoked for each command.
+ * For reads, this function will be passed the value read
+ * from the PHY, and process it.
+ * For writes, the result of this function will be written
+ * to the PHY register
+ */
+struct phy_cmd {
+ u32 mii_reg;
+ u32 mii_data;
+ u16 (*funct) (u16 mii_reg, struct net_device * dev);
+};
+
+/* struct phy_info: a structure which defines attributes for a PHY
+ *
+ * id will contain a number which represents the PHY. During
+ * startup, the driver will poll the PHY to find out what its
+ * UID--as defined by registers 2 and 3--is. The 32-bit result
+ * gotten from the PHY will be shifted right by "shift" bits to
+ * discard any bits which may change based on revision numbers
+ * unimportant to functionality
+ *
+ * The struct phy_cmd entries represent pointers to an arrays of
+ * commands which tell the driver what to do to the PHY.
+ */
+struct phy_info {
+ u32 id;
+ char *name;
+ unsigned int shift;
+ /* Called to configure the PHY, and modify the controller
+ * based on the results */
+ const struct phy_cmd *config;
+
+ /* Called when starting up the controller. Usually sets
+ * up the interrupt for state changes */
+ const struct phy_cmd *startup;
+
+ /* Called inside the interrupt handler to acknowledge
+ * the interrupt */
+ const struct phy_cmd *ack_int;
+
+ /* Called in the bottom half to handle the interrupt */
+ const struct phy_cmd *handle_int;
+
+ /* Called when bringing down the controller. Usually stops
+ * the interrupts from being generated */
+ const struct phy_cmd *shutdown;
+};
+
+struct phy_info *get_phy_info(struct net_device *dev);
+void phy_run_commands(struct net_device *dev, const struct phy_cmd *cmd);
+
+#endif /* GIANFAR_PHY_H */
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [RFR] gianfar ethernet driver
2004-07-05 17:28 ` [RFR] gianfar ethernet driver Jeff Garzik
@ 2004-07-06 2:38 ` jamal
[not found] ` <20040708231131.GA20305@infradead.org>
[not found] ` <1089375760.28614.1365.camel@hades.cambridge.redhat.com>
2 siblings, 0 replies; 5+ messages in thread
From: jamal @ 2004-07-06 2:38 UTC (permalink / raw)
To: Jeff Garzik; +Cc: Kumar Gala, Netdev, David Woodhouse
On Mon, 2004-07-05 at 13:28, Jeff Garzik wrote:
> (CC to netdev added)
>
> Kumar,
>
> I've merged the gianfar driver into my netdev-2.6 queue. This will get
> it automatically propagated into the -mm tree, and once some of these
> comments are resolved/discussed, pushed upstream as well.
>
> Follow-up patches should be incremental to this (your) patch.
>
>
> Others,
>
> I've attached the patch as Kumar submitted it. Please review.
>
>
>
> Comments:
Some pretty good comments there Jeff.
> 1) Share the knowledge. Please CC comments (and criticisms!) to netdev.
>
> 2) I'm strongly pondering vetoing try_fastroute() code in this driver.
> Surely this should be in core net stack code... if it isn't already? Jamal?
I hardly know anybody still using this interface - i believe it is not
useful after NAPI; maybe this comment would bring out some of the
believers out of the woodwork to comment.
Otherwise i would say kill it.
> 8) I recommend enabling _both_ hardware interrupt coalescing and NAPI,
> at the same time. Several other Linux net drivers need to be changed to
> do this, as well
Under low rates having both helps (by reducing the amount of PCI
operations - at the expense of some added latency)
> 18) As Jamal recently noted, no need to test netif_queue_stopped()
>
Since it is a new driver why dont we have him do more work? <evil grin
here, should that be followed by a loud eerie muhahahaha?> ;->
1) The check (in gfar_start_xmit()):
Should happen much sooner - i.e before the skb is touched.
if (txbdp == priv->dirty_tx) {
netif_stop_queue(dev)
unlock
return 1;
}
The rest of your code goes here ..
Do this before the skb is touched. Note the return 1. This means dont
add it to your priv->tx_skbuff[priv->skb_curtx] = skb before you do
this.
Dont understand why you have your own proivate list btw.
2) Also its pretty scary if you are doing:
txbdp->status |= TXBD_INTERRUPT for every packet.
Look at other drivers, they try to do this every few packets;
or enable tx mitigation to slow the rate of those interupts.
cheers,
jamal
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [RFR] gianfar ethernet driver
[not found] ` <20040708231131.GA20305@infradead.org>
@ 2004-07-08 23:25 ` Jeff Garzik
2004-07-08 23:35 ` Christoph Hellwig
0 siblings, 1 reply; 5+ messages in thread
From: Jeff Garzik @ 2004-07-08 23:25 UTC (permalink / raw)
To: Christoph Hellwig; +Cc: Kumar Gala, Netdev, David Woodhouse, jamal
Christoph Hellwig wrote:
> Are you sure someone ever tried building this driver modular? The makefile
> would try to build it into three separate modules, and they'd fail to load
> due to unresolved cross-depencies..
For embedded drivers isn't not uncommon that it's never used as a
module, so it wouldn't surprise me.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [RFR] gianfar ethernet driver
2004-07-08 23:25 ` Jeff Garzik
@ 2004-07-08 23:35 ` Christoph Hellwig
0 siblings, 0 replies; 5+ messages in thread
From: Christoph Hellwig @ 2004-07-08 23:35 UTC (permalink / raw)
To: Jeff Garzik; +Cc: Kumar Gala, Netdev, David Woodhouse, jamal
On Thu, Jul 08, 2004 at 07:25:37PM -0400, Jeff Garzik wrote:
> Christoph Hellwig wrote:
> >Are you sure someone ever tried building this driver modular? The
> >makefile
> >would try to build it into three separate modules, and they'd fail to load
> >due to unresolved cross-depencies..
>
>
> For embedded drivers isn't not uncommon that it's never used as a
> module, so it wouldn't surprise me.
then it shouldn't be declare tristate at least. But given that modularizig
a netdriver is trivial not doing so counts as a bug to me.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Phy layer notes (was Re: [RFR] gianfar ethernet driver)
[not found] ` <1089375760.28614.1365.camel@hades.cambridge.redhat.com>
@ 2004-07-09 16:47 ` Jeff Garzik
0 siblings, 0 replies; 5+ messages in thread
From: Jeff Garzik @ 2004-07-09 16:47 UTC (permalink / raw)
To: Netdev; +Cc: David Woodhouse, Kumar Gala, jamal
David Woodhouse wrote:
> Hmmm.
>
> eth0: Running with NAPI disabled
> eth0: 64/64 RX/TX BD ring size
> eth1: Gianfar Ethernet Controller Version 1.0, 05:e6:9e:c0:05:e6
> eth1: Running with NAPI disabled
> eth1: 64/64 RX/TX BD ring size
> eth0: PHY id 2060e1 is not supported!
> eth0: No PHY found
> IP-Config: Failed to open eth0
> IP-Config: Device `eth0' not found
>
> The PHY is a BCM5421S. Does it really have to give up completely? Isn't
> there a subset of common MII support it could use?
>
> Is it expected that every NIC driver will include its own version of
> support for the PHYs which have actually been seen paired with that NIC,
> or is there some more generic support planned?
David W and I discussed some of this on IRC.
1) most gige phys can be treated with generic GMII code. unfortunately
experience shows that phy init can often involve phy-specific magic
sequences.
2) we do need a generic phy layer, and I'm looking for volunteers who
want to prototype a nice, small, compact one. BenH has a nice template
in sungem_phy.c.
3) drivers/net/mii.c and include/linux/mii.h need GMII code and
constants. Feel free to add.
4) generic TBI code would be nice, too. (TBI is a standard gige fibre
interface)
5) sometimes a MAC+phy pairing is unique enough that you need
MAC-specific support for a particular phy. For example, one might wind
up with two phy drivers, one a generic Broadcom GMII phy driver (for use
by any NIC driver), and one a tg3-specific Broadcom GMII phy driver.
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[not found] <8F52CF1D-C916-11D8-BB6A-000393DBC2E8@freescale.com>
2004-07-05 17:28 ` [RFR] gianfar ethernet driver Jeff Garzik
2004-07-06 2:38 ` jamal
[not found] ` <20040708231131.GA20305@infradead.org>
2004-07-08 23:25 ` Jeff Garzik
2004-07-08 23:35 ` Christoph Hellwig
[not found] ` <1089375760.28614.1365.camel@hades.cambridge.redhat.com>
2004-07-09 16:47 ` Phy layer notes (was Re: [RFR] gianfar ethernet driver) Jeff Garzik
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