[PATCH net-next 5/7] ethernet: Remove the Sun LDOM vswitch and sunvnet drivers

Anirudh Venkataramanan
2023-01-06T21:59:32Z

In a recent patch series that touched these drivers [1], it was suggested
that these drivers should be removed completely. git logs suggest that
there hasn't been any significant feature addition, improvement or fixes to
user-visible bugs in a while. A web search didn't indicate any recent
discussions or any evidence that there are users out there who care about
these drivers, and so remove these drivers.

Notes:

checkpatch complains "WARNING: added, moved or deleted file(s), does
MAINTAINERS need updating?". The files being removed don't have their own
entries in the MAINTAINERS file, so there's nothing to remove.

checkpatch also complains about the long lore link below.

[1] https://lore.kernel.org/netdev/99629223-ac1b-0f82-50b8-ea307b3b0197@intel.com/T/#t

Suggested-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
---
drivers/net/ethernet/sun/Kconfig | 27 -
drivers/net/ethernet/sun/Makefile | 3 -
drivers/net/ethernet/sun/ldmvsw.c | 476 ------
drivers/net/ethernet/sun/sunvnet.c | 567 -------
drivers/net/ethernet/sun/sunvnet_common.c | 1813 ---------------------
drivers/net/ethernet/sun/sunvnet_common.h | 157 --
6 files changed, 3043 deletions(-)
delete mode 100644 drivers/net/ethernet/sun/ldmvsw.c
delete mode 100644 drivers/net/ethernet/sun/sunvnet.c
delete mode 100644 drivers/net/ethernet/sun/sunvnet_common.c
delete mode 100644 drivers/net/ethernet/sun/sunvnet_common.h

diff --git a/drivers/net/ethernet/sun/Kconfig b/drivers/net/ethernet/sun/Kconfig
index 57eb168..26472e4 100644
--- a/drivers/net/ethernet/sun/Kconfig
+++ b/drivers/net/ethernet/sun/Kconfig
@@ -62,33 +62,6 @@ config SUNGEM
Support for the Sun GEM chip, aka Sun GigabitEthernet/P 2.0. See also
<http://docs.oracle.com/cd/E19455-01/806-3985-10/806-3985-10.pdf>.

-config SUNVNET_COMMON
- tristate "Common routines to support Sun Virtual Networking"
- depends on SUN_LDOMS
- depends on INET
- default m
-
-config SUNVNET
- tristate "Sun Virtual Network support"
- default m
- depends on SUN_LDOMS
- depends on SUNVNET_COMMON
- help
- Support for virtual network devices under Sun Logical Domains.
-
-config LDMVSW
- tristate "Sun4v LDoms Virtual Switch support"
- default m
- depends on SUN_LDOMS
- depends on SUNVNET_COMMON
- help
- Support for virtual switch devices under Sun4v Logical Domains.
- This driver adds a network interface for every vsw-port node
- found in the machine description of a service domain.
- Linux bridge/switch software can use these interfaces for
- guest domain network interconnectivity or guest domain
- connection to a physical network on a service domain.
-
config NIU
tristate "Sun Neptune 10Gbit Ethernet support"
depends on PCI
diff --git a/drivers/net/ethernet/sun/Makefile b/drivers/net/ethernet/sun/Makefile
index fd77810..35469d1 100644
--- a/drivers/net/ethernet/sun/Makefile
+++ b/drivers/net/ethernet/sun/Makefile
@@ -7,7 +7,4 @@ obj-$(CONFIG_HAPPYMEAL) += sunhme.o
obj-$(CONFIG_SUNQE) += sunqe.o
obj-$(CONFIG_SUNBMAC) += sunbmac.o
obj-$(CONFIG_SUNGEM) += sungem.o
-obj-$(CONFIG_SUNVNET_COMMON) += sunvnet_common.o
-obj-$(CONFIG_SUNVNET) += sunvnet.o
-obj-$(CONFIG_LDMVSW) += ldmvsw.o
obj-$(CONFIG_NIU) += niu.o
diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c
deleted file mode 100644
index 8addee6..00000000
--- a/drivers/net/ethernet/sun/ldmvsw.c
+++ /dev/null
@@ -1,476 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* ldmvsw.c: Sun4v LDOM Virtual Switch Driver.
- *
- * Copyright (C) 2016-2017 Oracle. All rights reserved.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/delay.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/highmem.h>
-#include <linux/if_vlan.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/netdevice.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-
-#if defined(CONFIG_IPV6)
-#include <linux/icmpv6.h>
-#endif
-
-#include <net/ip.h>
-#include <net/icmp.h>
-#include <net/route.h>
-
-#include <asm/vio.h>
-#include <asm/ldc.h>
-
-/* This driver makes use of the common code in sunvnet_common.c */
-#include "sunvnet_common.h"
-
-/* Length of time before we decide the hardware is hung,
- * and dev->tx_timeout() should be called to fix the problem.
- */
-#define VSW_TX_TIMEOUT (10 * HZ)
-
-/* Static HW Addr used for the network interfaces representing vsw ports */
-static u8 vsw_port_hwaddr[ETH_ALEN] = {0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
-
-#define DRV_MODULE_NAME "ldmvsw"
-#define DRV_MODULE_VERSION "1.2"
-#define DRV_MODULE_RELDATE "March 4, 2017"
-
-static char version[] =
- DRV_MODULE_NAME " " DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")";
-MODULE_AUTHOR("Oracle");
-MODULE_DESCRIPTION("Sun4v LDOM Virtual Switch Driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_MODULE_VERSION);
-
-/* Ordered from largest major to lowest */
-static struct vio_version vsw_versions[] = {
- { .major = 1, .minor = 8 },
- { .major = 1, .minor = 7 },
- { .major = 1, .minor = 6 },
- { .major = 1, .minor = 0 },
-};
-
-static void vsw_get_drvinfo(struct net_device *dev,
- struct ethtool_drvinfo *info)
-{
- strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
- strscpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
-}
-
-static u32 vsw_get_msglevel(struct net_device *dev)
-{
- struct vnet_port *port = netdev_priv(dev);
-
- return port->vp->msg_enable;
-}
-
-static void vsw_set_msglevel(struct net_device *dev, u32 value)
-{
- struct vnet_port *port = netdev_priv(dev);
-
- port->vp->msg_enable = value;
-}
-
-static const struct ethtool_ops vsw_ethtool_ops = {
- .get_drvinfo = vsw_get_drvinfo,
- .get_msglevel = vsw_get_msglevel,
- .set_msglevel = vsw_set_msglevel,
- .get_link = ethtool_op_get_link,
-};
-
-static LIST_HEAD(vnet_list);
-static DEFINE_MUTEX(vnet_list_mutex);
-
-/* func arg to vnet_start_xmit_common() to get the proper tx port */
-static struct vnet_port *vsw_tx_port_find(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct vnet_port *port = netdev_priv(dev);
-
- return port;
-}
-
-static u16 vsw_select_queue(struct net_device *dev, struct sk_buff *skb,
- struct net_device *sb_dev)
-{
- struct vnet_port *port = netdev_priv(dev);
-
- if (!port)
- return 0;
-
- return port->q_index;
-}
-
-/* Wrappers to common functions */
-static netdev_tx_t vsw_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- return sunvnet_start_xmit_common(skb, dev, vsw_tx_port_find);
-}
-
-static void vsw_set_rx_mode(struct net_device *dev)
-{
- struct vnet_port *port = netdev_priv(dev);
-
- return sunvnet_set_rx_mode_common(dev, port->vp);
-}
-
-int ldmvsw_open(struct net_device *dev)
-{
- struct vnet_port *port = netdev_priv(dev);
- struct vio_driver_state *vio = &port->vio;
-
- /* reset the channel */
- vio_link_state_change(vio, LDC_EVENT_RESET);
- vnet_port_reset(port);
- vio_port_up(vio);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(ldmvsw_open);
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-static void vsw_poll_controller(struct net_device *dev)
-{
- struct vnet_port *port = netdev_priv(dev);
-
- return sunvnet_poll_controller_common(dev, port->vp);
-}
-#endif
-
-static const struct net_device_ops vsw_ops = {
- .ndo_open = ldmvsw_open,
- .ndo_stop = sunvnet_close_common,
- .ndo_set_rx_mode = vsw_set_rx_mode,
- .ndo_set_mac_address = sunvnet_set_mac_addr_common,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_tx_timeout = sunvnet_tx_timeout_common,
- .ndo_start_xmit = vsw_start_xmit,
- .ndo_select_queue = vsw_select_queue,
-#ifdef CONFIG_NET_POLL_CONTROLLER
- .ndo_poll_controller = vsw_poll_controller,
-#endif
-};
-
-static const char *local_mac_prop = "local-mac-address";
-static const char *cfg_handle_prop = "cfg-handle";
-
-static struct vnet *vsw_get_vnet(struct mdesc_handle *hp,
- u64 port_node,
- u64 *handle)
-{
- struct vnet *vp;
- struct vnet *iter;
- const u64 *local_mac = NULL;
- const u64 *cfghandle = NULL;
- u64 a;
-
- /* Get the parent virtual-network-switch macaddr and cfghandle */
- mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
- u64 target = mdesc_arc_target(hp, a);
- const char *name;
-
- name = mdesc_get_property(hp, target, "name", NULL);
- if (!name || strcmp(name, "virtual-network-switch"))
- continue;
-
- local_mac = mdesc_get_property(hp, target,
- local_mac_prop, NULL);
- cfghandle = mdesc_get_property(hp, target,
- cfg_handle_prop, NULL);
- break;
- }
- if (!local_mac || !cfghandle)
- return ERR_PTR(-ENODEV);
-
- /* find or create associated vnet */
- vp = NULL;
- mutex_lock(&vnet_list_mutex);
- list_for_each_entry(iter, &vnet_list, list) {
- if (iter->local_mac == *local_mac) {
- vp = iter;
- break;
- }
- }
-
- if (!vp) {
- vp = kzalloc(sizeof(*vp), GFP_KERNEL);
- if (unlikely(!vp)) {
- mutex_unlock(&vnet_list_mutex);
- return ERR_PTR(-ENOMEM);
- }
-
- spin_lock_init(&vp->lock);
- INIT_LIST_HEAD(&vp->port_list);
- INIT_LIST_HEAD(&vp->list);
- vp->local_mac = *local_mac;
- list_add(&vp->list, &vnet_list);
- }
-
- mutex_unlock(&vnet_list_mutex);
-
- *handle = (u64)*cfghandle;
-
- return vp;
-}
-
-static struct net_device *vsw_alloc_netdev(u8 hwaddr[],
- struct vio_dev *vdev,
- u64 handle,
- u64 port_id)
-{
- struct net_device *dev;
- struct vnet_port *port;
-
- dev = alloc_etherdev_mqs(sizeof(*port), VNET_MAX_TXQS, 1);
- if (!dev)
- return ERR_PTR(-ENOMEM);
- dev->needed_headroom = VNET_PACKET_SKIP + 8;
- dev->needed_tailroom = 8;
-
- eth_hw_addr_set(dev, hwaddr);
- ether_addr_copy(dev->perm_addr, dev->dev_addr);
-
- sprintf(dev->name, "vif%d.%d", (int)handle, (int)port_id);
-
- dev->netdev_ops = &vsw_ops;
- dev->ethtool_ops = &vsw_ethtool_ops;
- dev->watchdog_timeo = VSW_TX_TIMEOUT;
-
- dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG;
- dev->features = dev->hw_features;
-
- /* MTU range: 68 - 65535 */
- dev->min_mtu = ETH_MIN_MTU;
- dev->max_mtu = VNET_MAX_MTU;
-
- SET_NETDEV_DEV(dev, &vdev->dev);
-
- return dev;
-}
-
-static struct ldc_channel_config vsw_ldc_cfg = {
- .event = sunvnet_event_common,
- .mtu = 64,
- .mode = LDC_MODE_UNRELIABLE,
-};
-
-static struct vio_driver_ops vsw_vio_ops = {
- .send_attr = sunvnet_send_attr_common,
- .handle_attr = sunvnet_handle_attr_common,
- .handshake_complete = sunvnet_handshake_complete_common,
-};
-
-static const char *remote_macaddr_prop = "remote-mac-address";
-static const char *id_prop = "id";
-
-static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
-{
- struct mdesc_handle *hp;
- struct vnet_port *port;
- unsigned long flags;
- struct vnet *vp;
- struct net_device *dev;
- const u64 *rmac;
- int len, i, err;
- const u64 *port_id;
- u64 handle;
-
- hp = mdesc_grab();
-
- rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
- err = -ENODEV;
- if (!rmac) {
- pr_err("Port lacks %s property\n", remote_macaddr_prop);
- mdesc_release(hp);
- return err;
- }
-
- port_id = mdesc_get_property(hp, vdev->mp, id_prop, NULL);
- err = -ENODEV;
- if (!port_id) {
- pr_err("Port lacks %s property\n", id_prop);
- mdesc_release(hp);
- return err;
- }
-
- /* Get (or create) the vnet associated with this port */
- vp = vsw_get_vnet(hp, vdev->mp, &handle);
- if (IS_ERR(vp)) {
- err = PTR_ERR(vp);
- pr_err("Failed to get vnet for vsw-port\n");
- mdesc_release(hp);
- return err;
- }
-
- mdesc_release(hp);
-
- dev = vsw_alloc_netdev(vsw_port_hwaddr, vdev, handle, *port_id);
- if (IS_ERR(dev)) {
- err = PTR_ERR(dev);
- pr_err("Failed to alloc netdev for vsw-port\n");
- return err;
- }
-
- port = netdev_priv(dev);
-
- INIT_LIST_HEAD(&port->list);
-
- for (i = 0; i < ETH_ALEN; i++)
- port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
-
- port->vp = vp;
- port->dev = dev;
- port->switch_port = 1;
- port->tso = false; /* no tso in vsw, misbehaves in bridge */
- port->tsolen = 0;
-
- /* Mark the port as belonging to ldmvsw which directs the
- * common code to use the net_device in the vnet_port
- * rather than the net_device in the vnet (which is used
- * by sunvnet). This bit is used by the VNET_PORT_TO_NET_DEVICE
- * macro.
- */
- port->vsw = 1;
-
- err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
- vsw_versions, ARRAY_SIZE(vsw_versions),
- &vsw_vio_ops, dev->name);
- if (err)
- goto err_out_free_dev;
-
- err = vio_ldc_alloc(&port->vio, &vsw_ldc_cfg, port);
- if (err)
- goto err_out_free_dev;
-
- dev_set_drvdata(&vdev->dev, port);
-
- netif_napi_add(dev, &port->napi, sunvnet_poll_common);
-
- spin_lock_irqsave(&vp->lock, flags);
- list_add_rcu(&port->list, &vp->port_list);
- spin_unlock_irqrestore(&vp->lock, flags);
-
- timer_setup(&port->clean_timer, sunvnet_clean_timer_expire_common, 0);
-
- err = register_netdev(dev);
- if (err) {
- pr_err("Cannot register net device, aborting\n");
- goto err_out_del_timer;
- }
-
- spin_lock_irqsave(&vp->lock, flags);
- sunvnet_port_add_txq_common(port);
- spin_unlock_irqrestore(&vp->lock, flags);
-
- napi_enable(&port->napi);
- vio_port_up(&port->vio);
-
- /* assure no carrier until we receive an LDC_EVENT_UP,
- * even if the vsw config script tries to force us up
- */
- netif_carrier_off(dev);
-
- netdev_info(dev, "LDOM vsw-port %pM\n", dev->dev_addr);
-
- pr_info("%s: PORT ( remote-mac %pM%s )\n", dev->name,
- port->raddr, " switch-port");
-
- return 0;
-
-err_out_del_timer:
- del_timer_sync(&port->clean_timer);
- list_del_rcu(&port->list);
- synchronize_rcu();
- netif_napi_del(&port->napi);
- dev_set_drvdata(&vdev->dev, NULL);
- vio_ldc_free(&port->vio);
-
-err_out_free_dev:
- free_netdev(dev);
- return err;
-}
-
-static void vsw_port_remove(struct vio_dev *vdev)
-{
- struct vnet_port *port = dev_get_drvdata(&vdev->dev);
- unsigned long flags;
-
- if (port) {
- del_timer_sync(&port->vio.timer);
- del_timer_sync(&port->clean_timer);
-
- napi_disable(&port->napi);
- unregister_netdev(port->dev);
-
- list_del_rcu(&port->list);
-
- synchronize_rcu();
- spin_lock_irqsave(&port->vp->lock, flags);
- sunvnet_port_rm_txq_common(port);
- spin_unlock_irqrestore(&port->vp->lock, flags);
- netif_napi_del(&port->napi);
- sunvnet_port_free_tx_bufs_common(port);
- vio_ldc_free(&port->vio);
-
- dev_set_drvdata(&vdev->dev, NULL);
-
- free_netdev(port->dev);
- }
-}
-
-static void vsw_cleanup(void)
-{
- struct vnet *vp;
-
- /* just need to free up the vnet list */
- mutex_lock(&vnet_list_mutex);
- while (!list_empty(&vnet_list)) {
- vp = list_first_entry(&vnet_list, struct vnet, list);
- list_del(&vp->list);
- /* vio_unregister_driver() should have cleaned up port_list */
- if (!list_empty(&vp->port_list))
- pr_err("Ports not removed by VIO subsystem!\n");
- kfree(vp);
- }
- mutex_unlock(&vnet_list_mutex);
-}
-
-static const struct vio_device_id vsw_port_match[] = {
- {
- .type = "vsw-port",
- },
- {},
-};
-MODULE_DEVICE_TABLE(vio, vsw_port_match);
-
-static struct vio_driver vsw_port_driver = {
- .id_table = vsw_port_match,
- .probe = vsw_port_probe,
- .remove = vsw_port_remove,
- .name = "vsw_port",
-};
-
-static int __init vsw_init(void)
-{
- pr_info("%s\n", version);
- return vio_register_driver(&vsw_port_driver);
-}
-
-static void __exit vsw_exit(void)
-{
- vio_unregister_driver(&vsw_port_driver);
- vsw_cleanup();
-}
-
-module_init(vsw_init);
-module_exit(vsw_exit);
diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
deleted file mode 100644
index fe86fbd..00000000
--- a/drivers/net/ethernet/sun/sunvnet.c
+++ /dev/null
@@ -1,567 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* sunvnet.c: Sun LDOM Virtual Network Driver.
- *
- * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
- * Copyright (C) 2016-2017 Oracle. All rights reserved.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/ethtool.h>
-#include <linux/etherdevice.h>
-#include <linux/mutex.h>
-#include <linux/highmem.h>
-#include <linux/if_vlan.h>
-
-#if IS_ENABLED(CONFIG_IPV6)
-#include <linux/icmpv6.h>
-#endif
-
-#include <net/ip.h>
-#include <net/icmp.h>
-#include <net/route.h>
-
-#include <asm/vio.h>
-#include <asm/ldc.h>
-
-#include "sunvnet_common.h"
-
-/* length of time before we decide the hardware is borked,
- * and dev->tx_timeout() should be called to fix the problem
- */
-#define VNET_TX_TIMEOUT (5 * HZ)
-
-#define DRV_MODULE_NAME "sunvnet"
-#define DRV_MODULE_VERSION "2.0"
-#define DRV_MODULE_RELDATE "February 3, 2017"
-
-static char version[] =
- DRV_MODULE_NAME " " DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")";
-MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
-MODULE_DESCRIPTION("Sun LDOM virtual network driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_MODULE_VERSION);
-
-/* Ordered from largest major to lowest */
-static struct vio_version vnet_versions[] = {
- { .major = 1, .minor = 8 },
- { .major = 1, .minor = 7 },
- { .major = 1, .minor = 6 },
- { .major = 1, .minor = 0 },
-};
-
-static void vnet_get_drvinfo(struct net_device *dev,
- struct ethtool_drvinfo *info)
-{
- strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
- strscpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
-}
-
-static u32 vnet_get_msglevel(struct net_device *dev)
-{
- struct vnet *vp = netdev_priv(dev);
-
- return vp->msg_enable;
-}
-
-static void vnet_set_msglevel(struct net_device *dev, u32 value)
-{
- struct vnet *vp = netdev_priv(dev);
-
- vp->msg_enable = value;
-}
-
-static const struct {
- const char string[ETH_GSTRING_LEN];
-} ethtool_stats_keys[] = {
- { "rx_packets" },
- { "tx_packets" },
- { "rx_bytes" },
- { "tx_bytes" },
- { "rx_errors" },
- { "tx_errors" },
- { "rx_dropped" },
- { "tx_dropped" },
- { "multicast" },
- { "rx_length_errors" },
- { "rx_frame_errors" },
- { "rx_missed_errors" },
- { "tx_carrier_errors" },
- { "nports" },
-};
-
-static int vnet_get_sset_count(struct net_device *dev, int sset)
-{
- struct vnet *vp = (struct vnet *)netdev_priv(dev);
-
- switch (sset) {
- case ETH_SS_STATS:
- return ARRAY_SIZE(ethtool_stats_keys)
- + (NUM_VNET_PORT_STATS * vp->nports);
- default:
- return -EOPNOTSUPP;
- }
-}
-
-static void vnet_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
-{
- struct vnet *vp = (struct vnet *)netdev_priv(dev);
- struct vnet_port *port;
- char *p = (char *)buf;
-
- switch (stringset) {
- case ETH_SS_STATS:
- memcpy(buf, &ethtool_stats_keys, sizeof(ethtool_stats_keys));
- p += sizeof(ethtool_stats_keys);
-
- rcu_read_lock();
- list_for_each_entry_rcu(port, &vp->port_list, list) {
- snprintf(p, ETH_GSTRING_LEN, "p%u.%s-%pM",
- port->q_index, port->switch_port ? "s" : "q",
- port->raddr);
- p += ETH_GSTRING_LEN;
- snprintf(p, ETH_GSTRING_LEN, "p%u.rx_packets",
- port->q_index);
- p += ETH_GSTRING_LEN;
- snprintf(p, ETH_GSTRING_LEN, "p%u.tx_packets",
- port->q_index);
- p += ETH_GSTRING_LEN;
- snprintf(p, ETH_GSTRING_LEN, "p%u.rx_bytes",
- port->q_index);
- p += ETH_GSTRING_LEN;
- snprintf(p, ETH_GSTRING_LEN, "p%u.tx_bytes",
- port->q_index);
- p += ETH_GSTRING_LEN;
- snprintf(p, ETH_GSTRING_LEN, "p%u.event_up",
- port->q_index);
- p += ETH_GSTRING_LEN;
- snprintf(p, ETH_GSTRING_LEN, "p%u.event_reset",
- port->q_index);
- p += ETH_GSTRING_LEN;
- }
- rcu_read_unlock();
- break;
- default:
- WARN_ON(1);
- break;
- }
-}
-
-static void vnet_get_ethtool_stats(struct net_device *dev,
- struct ethtool_stats *estats, u64 *data)
-{
- struct vnet *vp = (struct vnet *)netdev_priv(dev);
- struct vnet_port *port;
- int i = 0;
-
- data[i++] = dev->stats.rx_packets;
- data[i++] = dev->stats.tx_packets;
- data[i++] = dev->stats.rx_bytes;
- data[i++] = dev->stats.tx_bytes;
- data[i++] = dev->stats.rx_errors;
- data[i++] = dev->stats.tx_errors;
- data[i++] = dev->stats.rx_dropped;
- data[i++] = dev->stats.tx_dropped;
- data[i++] = dev->stats.multicast;
- data[i++] = dev->stats.rx_length_errors;
- data[i++] = dev->stats.rx_frame_errors;
- data[i++] = dev->stats.rx_missed_errors;
- data[i++] = dev->stats.tx_carrier_errors;
- data[i++] = vp->nports;
-
- rcu_read_lock();
- list_for_each_entry_rcu(port, &vp->port_list, list) {
- data[i++] = port->q_index;
- data[i++] = port->stats.rx_packets;
- data[i++] = port->stats.tx_packets;
- data[i++] = port->stats.rx_bytes;
- data[i++] = port->stats.tx_bytes;
- data[i++] = port->stats.event_up;
- data[i++] = port->stats.event_reset;
- }
- rcu_read_unlock();
-}
-
-static const struct ethtool_ops vnet_ethtool_ops = {
- .get_drvinfo = vnet_get_drvinfo,
- .get_msglevel = vnet_get_msglevel,
- .set_msglevel = vnet_set_msglevel,
- .get_link = ethtool_op_get_link,
- .get_sset_count = vnet_get_sset_count,
- .get_strings = vnet_get_strings,
- .get_ethtool_stats = vnet_get_ethtool_stats,
-};
-
-static LIST_HEAD(vnet_list);
-static DEFINE_MUTEX(vnet_list_mutex);
-
-static struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
-{
- unsigned int hash = vnet_hashfn(skb->data);
- struct hlist_head *hp = &vp->port_hash[hash];
- struct vnet_port *port;
-
- hlist_for_each_entry_rcu(port, hp, hash) {
- if (!sunvnet_port_is_up_common(port))
- continue;
- if (ether_addr_equal(port->raddr, skb->data))
- return port;
- }
- list_for_each_entry_rcu(port, &vp->port_list, list) {
- if (!port->switch_port)
- continue;
- if (!sunvnet_port_is_up_common(port))
- continue;
- return port;
- }
- return NULL;
-}
-
-/* func arg to vnet_start_xmit_common() to get the proper tx port */
-static struct vnet_port *vnet_tx_port_find(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct vnet *vp = netdev_priv(dev);
-
- return __tx_port_find(vp, skb);
-}
-
-static u16 vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
- struct net_device *sb_dev)
-{
- struct vnet *vp = netdev_priv(dev);
- struct vnet_port *port = __tx_port_find(vp, skb);
-
- if (!port)
- return 0;
-
- return port->q_index;
-}
-
-/* Wrappers to common functions */
-static netdev_tx_t vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- return sunvnet_start_xmit_common(skb, dev, vnet_tx_port_find);
-}
-
-static void vnet_set_rx_mode(struct net_device *dev)
-{
- struct vnet *vp = netdev_priv(dev);
-
- return sunvnet_set_rx_mode_common(dev, vp);
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-static void vnet_poll_controller(struct net_device *dev)
-{
- struct vnet *vp = netdev_priv(dev);
-
- return sunvnet_poll_controller_common(dev, vp);
-}
-#endif
-
-static const struct net_device_ops vnet_ops = {
- .ndo_open = sunvnet_open_common,
- .ndo_stop = sunvnet_close_common,
- .ndo_set_rx_mode = vnet_set_rx_mode,
- .ndo_set_mac_address = sunvnet_set_mac_addr_common,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_tx_timeout = sunvnet_tx_timeout_common,
- .ndo_start_xmit = vnet_start_xmit,
- .ndo_select_queue = vnet_select_queue,
-#ifdef CONFIG_NET_POLL_CONTROLLER
- .ndo_poll_controller = vnet_poll_controller,
-#endif
-};
-
-static struct vnet *vnet_new(const u64 *local_mac,
- struct vio_dev *vdev)
-{
- struct net_device *dev;
- u8 addr[ETH_ALEN];
- struct vnet *vp;
- int err, i;
-
- dev = alloc_etherdev_mqs(sizeof(*vp), VNET_MAX_TXQS, 1);
- if (!dev)
- return ERR_PTR(-ENOMEM);
- dev->needed_headroom = VNET_PACKET_SKIP + 8;
- dev->needed_tailroom = 8;
-
- for (i = 0; i < ETH_ALEN; i++)
- addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;
- eth_hw_addr_set(dev, addr);
-
- vp = netdev_priv(dev);
-
- spin_lock_init(&vp->lock);
- vp->dev = dev;
-
- INIT_LIST_HEAD(&vp->port_list);
- for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
- INIT_HLIST_HEAD(&vp->port_hash[i]);
- INIT_LIST_HEAD(&vp->list);
- vp->local_mac = *local_mac;
-
- dev->netdev_ops = &vnet_ops;
- dev->ethtool_ops = &vnet_ethtool_ops;
- dev->watchdog_timeo = VNET_TX_TIMEOUT;
-
- dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_ALL_TSO |
- NETIF_F_HW_CSUM | NETIF_F_SG;
- dev->features = dev->hw_features;
-
- /* MTU range: 68 - 65535 */
- dev->min_mtu = ETH_MIN_MTU;
- dev->max_mtu = VNET_MAX_MTU;
-
- SET_NETDEV_DEV(dev, &vdev->dev);
-
- err = register_netdev(dev);
- if (err) {
- pr_err("Cannot register net device, aborting\n");
- goto err_out_free_dev;
- }
-
- netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);
-
- list_add(&vp->list, &vnet_list);
-
- return vp;
-
-err_out_free_dev:
- free_netdev(dev);
-
- return ERR_PTR(err);
-}
-
-static struct vnet *vnet_find_or_create(const u64 *local_mac,
- struct vio_dev *vdev)
-{
- struct vnet *iter, *vp;
-
- mutex_lock(&vnet_list_mutex);
- vp = NULL;
- list_for_each_entry(iter, &vnet_list, list) {
- if (iter->local_mac == *local_mac) {
- vp = iter;
- break;
- }
- }
- if (!vp)
- vp = vnet_new(local_mac, vdev);
- mutex_unlock(&vnet_list_mutex);
-
- return vp;
-}
-
-static void vnet_cleanup(void)
-{
- struct vnet *vp;
- struct net_device *dev;
-
- mutex_lock(&vnet_list_mutex);
- while (!list_empty(&vnet_list)) {
- vp = list_first_entry(&vnet_list, struct vnet, list);
- list_del(&vp->list);
- dev = vp->dev;
- /* vio_unregister_driver() should have cleaned up port_list */
- BUG_ON(!list_empty(&vp->port_list));
- unregister_netdev(dev);
- free_netdev(dev);
- }
- mutex_unlock(&vnet_list_mutex);
-}
-
-static const char *local_mac_prop = "local-mac-address";
-
-static struct vnet *vnet_find_parent(struct mdesc_handle *hp,
- u64 port_node,
- struct vio_dev *vdev)
-{
- const u64 *local_mac = NULL;
- u64 a;
-
- mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
- u64 target = mdesc_arc_target(hp, a);
- const char *name;
-
- name = mdesc_get_property(hp, target, "name", NULL);
- if (!name || strcmp(name, "network"))
- continue;
-
- local_mac = mdesc_get_property(hp, target,
- local_mac_prop, NULL);
- if (local_mac)
- break;
- }
- if (!local_mac)
- return ERR_PTR(-ENODEV);
-
- return vnet_find_or_create(local_mac, vdev);
-}
-
-static struct ldc_channel_config vnet_ldc_cfg = {
- .event = sunvnet_event_common,
- .mtu = 64,
- .mode = LDC_MODE_UNRELIABLE,
-};
-
-static struct vio_driver_ops vnet_vio_ops = {
- .send_attr = sunvnet_send_attr_common,
- .handle_attr = sunvnet_handle_attr_common,
- .handshake_complete = sunvnet_handshake_complete_common,
-};
-
-const char *remote_macaddr_prop = "remote-mac-address";
-
-static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
-{
- struct mdesc_handle *hp;
- struct vnet_port *port;
- unsigned long flags;
- struct vnet *vp;
- const u64 *rmac;
- int len, i, err, switch_port;
-
- hp = mdesc_grab();
-
- vp = vnet_find_parent(hp, vdev->mp, vdev);
- if (IS_ERR(vp)) {
- pr_err("Cannot find port parent vnet\n");
- err = PTR_ERR(vp);
- goto err_out_put_mdesc;
- }
-
- rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
- err = -ENODEV;
- if (!rmac) {
- pr_err("Port lacks %s property\n", remote_macaddr_prop);
- goto err_out_put_mdesc;
- }
-
- port = kzalloc(sizeof(*port), GFP_KERNEL);
- err = -ENOMEM;
- if (!port)
- goto err_out_put_mdesc;
-
- for (i = 0; i < ETH_ALEN; i++)
- port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
-
- port->vp = vp;
-
- err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
- vnet_versions, ARRAY_SIZE(vnet_versions),
- &vnet_vio_ops, vp->dev->name);
- if (err)
- goto err_out_free_port;
-
- err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
- if (err)
- goto err_out_free_port;
-
- netif_napi_add(port->vp->dev, &port->napi, sunvnet_poll_common);
-
- INIT_HLIST_NODE(&port->hash);
- INIT_LIST_HEAD(&port->list);
-
- switch_port = 0;
- if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL))
- switch_port = 1;
- port->switch_port = switch_port;
- port->tso = true;
- port->tsolen = 0;
-
- spin_lock_irqsave(&vp->lock, flags);
- if (switch_port)
- list_add_rcu(&port->list, &vp->port_list);
- else
- list_add_tail_rcu(&port->list, &vp->port_list);
- hlist_add_head_rcu(&port->hash,
- &vp->port_hash[vnet_hashfn(port->raddr)]);
- sunvnet_port_add_txq_common(port);
- spin_unlock_irqrestore(&vp->lock, flags);
-
- dev_set_drvdata(&vdev->dev, port);
-
- pr_info("%s: PORT ( remote-mac %pM%s )\n",
- vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
-
- timer_setup(&port->clean_timer, sunvnet_clean_timer_expire_common, 0);
-
- napi_enable(&port->napi);
- vio_port_up(&port->vio);
-
- mdesc_release(hp);
-
- return 0;
-
-err_out_free_port:
- kfree(port);
-
-err_out_put_mdesc:
- mdesc_release(hp);
- return err;
-}
-
-static void vnet_port_remove(struct vio_dev *vdev)
-{
- struct vnet_port *port = dev_get_drvdata(&vdev->dev);
-
- if (port) {
- del_timer_sync(&port->vio.timer);
-
- napi_disable(&port->napi);
-
- list_del_rcu(&port->list);
- hlist_del_rcu(&port->hash);
-
- synchronize_rcu();
- timer_shutdown_sync(&port->clean_timer);
- sunvnet_port_rm_txq_common(port);
- netif_napi_del(&port->napi);
- sunvnet_port_free_tx_bufs_common(port);
- vio_ldc_free(&port->vio);
-
- dev_set_drvdata(&vdev->dev, NULL);
-
- kfree(port);
- }
-}
-
-static const struct vio_device_id vnet_port_match[] = {
- {
- .type = "vnet-port",
- },
- {},
-};
-MODULE_DEVICE_TABLE(vio, vnet_port_match);
-
-static struct vio_driver vnet_port_driver = {
- .id_table = vnet_port_match,
- .probe = vnet_port_probe,
- .remove = vnet_port_remove,
- .name = "vnet_port",
-};
-
-static int __init vnet_init(void)
-{
- pr_info("%s\n", version);
- return vio_register_driver(&vnet_port_driver);
-}
-
-static void __exit vnet_exit(void)
-{
- vio_unregister_driver(&vnet_port_driver);
- vnet_cleanup();
-}
-
-module_init(vnet_init);
-module_exit(vnet_exit);
diff --git a/drivers/net/ethernet/sun/sunvnet_common.c b/drivers/net/ethernet/sun/sunvnet_common.c
deleted file mode 100644
index a6211b9..00000000
--- a/drivers/net/ethernet/sun/sunvnet_common.c
+++ /dev/null
@@ -1,1813 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* sunvnet.c: Sun LDOM Virtual Network Driver.
- *
- * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
- * Copyright (C) 2016-2017 Oracle. All rights reserved.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/ethtool.h>
-#include <linux/etherdevice.h>
-#include <linux/mutex.h>
-#include <linux/highmem.h>
-#include <linux/if_vlan.h>
-#define CREATE_TRACE_POINTS
-#include <trace/events/sunvnet.h>
-
-#if IS_ENABLED(CONFIG_IPV6)
-#include <linux/icmpv6.h>
-#endif
-
-#include <net/ip.h>
-#include <net/icmp.h>
-#include <net/route.h>
-
-#include <asm/vio.h>
-#include <asm/ldc.h>
-
-#include "sunvnet_common.h"
-
-/* Heuristic for the number of times to exponentially backoff and
- * retry sending an LDC trigger when EAGAIN is encountered
- */
-#define VNET_MAX_RETRIES 10
-
-MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
-MODULE_DESCRIPTION("Sun LDOM virtual network support library");
-MODULE_LICENSE("GPL");
-MODULE_VERSION("1.1");
-
-static int __vnet_tx_trigger(struct vnet_port *port, u32 start);
-
-static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr)
-{
- return vio_dring_avail(dr, VNET_TX_RING_SIZE);
-}
-
-static int vnet_handle_unknown(struct vnet_port *port, void *arg)
-{
- struct vio_msg_tag *pkt = arg;
-
- pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n",
- pkt->type, pkt->stype, pkt->stype_env, pkt->sid);
- pr_err("Resetting connection\n");
-
- ldc_disconnect(port->vio.lp);
-
- return -ECONNRESET;
-}
-
-static int vnet_port_alloc_tx_ring(struct vnet_port *port);
-
-int sunvnet_send_attr_common(struct vio_driver_state *vio)
-{
- struct vnet_port *port = to_vnet_port(vio);
- struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
- struct vio_net_attr_info pkt;
- int framelen = ETH_FRAME_LEN;
- int i, err;
-
- err = vnet_port_alloc_tx_ring(to_vnet_port(vio));
- if (err)
- return err;
-
- memset(&pkt, 0, sizeof(pkt));
- pkt.tag.type = VIO_TYPE_CTRL;
- pkt.tag.stype = VIO_SUBTYPE_INFO;
- pkt.tag.stype_env = VIO_ATTR_INFO;
- pkt.tag.sid = vio_send_sid(vio);
- if (vio_version_before(vio, 1, 2))
- pkt.xfer_mode = VIO_DRING_MODE;
- else
- pkt.xfer_mode = VIO_NEW_DRING_MODE;
- pkt.addr_type = VNET_ADDR_ETHERMAC;
- pkt.ack_freq = 0;
- for (i = 0; i < 6; i++)
- pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
- if (vio_version_after(vio, 1, 3)) {
- if (port->rmtu) {
- port->rmtu = min(VNET_MAXPACKET, port->rmtu);
- pkt.mtu = port->rmtu;
- } else {
- port->rmtu = VNET_MAXPACKET;
- pkt.mtu = port->rmtu;
- }
- if (vio_version_after_eq(vio, 1, 6))
- pkt.options = VIO_TX_DRING;
- } else if (vio_version_before(vio, 1, 3)) {
- pkt.mtu = framelen;
- } else { /* v1.3 */
- pkt.mtu = framelen + VLAN_HLEN;
- }
-
- pkt.cflags = 0;
- if (vio_version_after_eq(vio, 1, 7) && port->tso) {
- pkt.cflags |= VNET_LSO_IPV4_CAPAB;
- if (!port->tsolen)
- port->tsolen = VNET_MAXTSO;
- pkt.ipv4_lso_maxlen = port->tsolen;
- }
-
- pkt.plnk_updt = PHYSLINK_UPDATE_NONE;
-
- viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
- "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] "
- "cflags[0x%04x] lso_max[%u]\n",
- pkt.xfer_mode, pkt.addr_type,
- (unsigned long long)pkt.addr,
- pkt.ack_freq, pkt.plnk_updt, pkt.options,
- (unsigned long long)pkt.mtu, pkt.cflags, pkt.ipv4_lso_maxlen);
-
- return vio_ldc_send(vio, &pkt, sizeof(pkt));
-}
-EXPORT_SYMBOL_GPL(sunvnet_send_attr_common);
-
-static int handle_attr_info(struct vio_driver_state *vio,
- struct vio_net_attr_info *pkt)
-{
- struct vnet_port *port = to_vnet_port(vio);
- u64 localmtu;
- u8 xfer_mode;
-
- viodbg(HS, "GOT NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
- "ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] "
- " (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n",
- pkt->xfer_mode, pkt->addr_type,
- (unsigned long long)pkt->addr,
- pkt->ack_freq, pkt->plnk_updt, pkt->options,
- (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags,
- pkt->ipv4_lso_maxlen);
-
- pkt->tag.sid = vio_send_sid(vio);
-
- xfer_mode = pkt->xfer_mode;
- /* for version < 1.2, VIO_DRING_MODE = 0x3 and no bitmask */
- if (vio_version_before(vio, 1, 2) && xfer_mode == VIO_DRING_MODE)
- xfer_mode = VIO_NEW_DRING_MODE;
-
- /* MTU negotiation:
- * < v1.3 - ETH_FRAME_LEN exactly
- * > v1.3 - MIN(pkt.mtu, VNET_MAXPACKET, port->rmtu) and change
- * pkt->mtu for ACK
- * = v1.3 - ETH_FRAME_LEN + VLAN_HLEN exactly
- */
- if (vio_version_before(vio, 1, 3)) {
- localmtu = ETH_FRAME_LEN;
- } else if (vio_version_after(vio, 1, 3)) {
- localmtu = port->rmtu ? port->rmtu : VNET_MAXPACKET;
- localmtu = min(pkt->mtu, localmtu);
- pkt->mtu = localmtu;
- } else { /* v1.3 */
- localmtu = ETH_FRAME_LEN + VLAN_HLEN;
- }
- port->rmtu = localmtu;
-
- /* LSO negotiation */
- if (vio_version_after_eq(vio, 1, 7))
- port->tso &= !!(pkt->cflags & VNET_LSO_IPV4_CAPAB);
- else
- port->tso = false;
- if (port->tso) {
- if (!port->tsolen)
- port->tsolen = VNET_MAXTSO;
- port->tsolen = min(port->tsolen, pkt->ipv4_lso_maxlen);
- if (port->tsolen < VNET_MINTSO) {
- port->tso = false;
- port->tsolen = 0;
- pkt->cflags &= ~VNET_LSO_IPV4_CAPAB;
- }
- pkt->ipv4_lso_maxlen = port->tsolen;
- } else {
- pkt->cflags &= ~VNET_LSO_IPV4_CAPAB;
- pkt->ipv4_lso_maxlen = 0;
- port->tsolen = 0;
- }
-
- /* for version >= 1.6, ACK packet mode we support */
- if (vio_version_after_eq(vio, 1, 6)) {
- pkt->xfer_mode = VIO_NEW_DRING_MODE;
- pkt->options = VIO_TX_DRING;
- }
-
- if (!(xfer_mode | VIO_NEW_DRING_MODE) ||
- pkt->addr_type != VNET_ADDR_ETHERMAC ||
- pkt->mtu != localmtu) {
- viodbg(HS, "SEND NET ATTR NACK\n");
-
- pkt->tag.stype = VIO_SUBTYPE_NACK;
-
- (void)vio_ldc_send(vio, pkt, sizeof(*pkt));
-
- return -ECONNRESET;
- }
-
- viodbg(HS, "SEND NET ATTR ACK xmode[0x%x] atype[0x%x] "
- "addr[%llx] ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] "
- "mtu[%llu] (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n",
- pkt->xfer_mode, pkt->addr_type,
- (unsigned long long)pkt->addr,
- pkt->ack_freq, pkt->plnk_updt, pkt->options,
- (unsigned long long)pkt->mtu, port->rmtu, pkt->cflags,
- pkt->ipv4_lso_maxlen);
-
- pkt->tag.stype = VIO_SUBTYPE_ACK;
-
- return vio_ldc_send(vio, pkt, sizeof(*pkt));
-}
-
-static int handle_attr_ack(struct vio_driver_state *vio,
- struct vio_net_attr_info *pkt)
-{
- viodbg(HS, "GOT NET ATTR ACK\n");
-
- return 0;
-}
-
-static int handle_attr_nack(struct vio_driver_state *vio,
- struct vio_net_attr_info *pkt)
-{
- viodbg(HS, "GOT NET ATTR NACK\n");
-
- return -ECONNRESET;
-}
-
-int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg)
-{
- struct vio_net_attr_info *pkt = arg;
-
- switch (pkt->tag.stype) {
- case VIO_SUBTYPE_INFO:
- return handle_attr_info(vio, pkt);
-
- case VIO_SUBTYPE_ACK:
- return handle_attr_ack(vio, pkt);
-
- case VIO_SUBTYPE_NACK:
- return handle_attr_nack(vio, pkt);
-
- default:
- return -ECONNRESET;
- }
-}
-EXPORT_SYMBOL_GPL(sunvnet_handle_attr_common);
-
-void sunvnet_handshake_complete_common(struct vio_driver_state *vio)
-{
- struct vio_dring_state *dr;
-
- dr = &vio->drings[VIO_DRIVER_RX_RING];
- dr->rcv_nxt = 1;
- dr->snd_nxt = 1;
-
- dr = &vio->drings[VIO_DRIVER_TX_RING];
- dr->rcv_nxt = 1;
- dr->snd_nxt = 1;
-}
-EXPORT_SYMBOL_GPL(sunvnet_handshake_complete_common);
-
-/* The hypervisor interface that implements copying to/from imported
- * memory from another domain requires that copies are done to 8-byte
- * aligned buffers, and that the lengths of such copies are also 8-byte
- * multiples.
- *
- * So we align skb->data to an 8-byte multiple and pad-out the data
- * area so we can round the copy length up to the next multiple of
- * 8 for the copy.
- *
- * The transmitter puts the actual start of the packet 6 bytes into
- * the buffer it sends over, so that the IP headers after the ethernet
- * header are aligned properly. These 6 bytes are not in the descriptor
- * length, they are simply implied. This offset is represented using
- * the VNET_PACKET_SKIP macro.
- */
-static struct sk_buff *alloc_and_align_skb(struct net_device *dev,
- unsigned int len)
-{
- struct sk_buff *skb;
- unsigned long addr, off;
-
- skb = netdev_alloc_skb(dev, len + VNET_PACKET_SKIP + 8 + 8);
- if (unlikely(!skb))
- return NULL;
-
- addr = (unsigned long)skb->data;
- off = ((addr + 7UL) & ~7UL) - addr;
- if (off)
- skb_reserve(skb, off);
-
- return skb;
-}
-
-static inline void vnet_fullcsum_ipv4(struct sk_buff *skb)
-{
- struct iphdr *iph = ip_hdr(skb);
- int offset = skb_transport_offset(skb);
-
- if (skb->protocol != htons(ETH_P_IP))
- return;
- if (iph->protocol != IPPROTO_TCP &&
- iph->protocol != IPPROTO_UDP)
- return;
- skb->ip_summed = CHECKSUM_NONE;
- skb->csum_level = 1;
- skb->csum = 0;
- if (iph->protocol == IPPROTO_TCP) {
- struct tcphdr *ptcp = tcp_hdr(skb);
-
- ptcp->check = 0;
- skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
- ptcp->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
- skb->len - offset, IPPROTO_TCP,
- skb->csum);
- } else if (iph->protocol == IPPROTO_UDP) {
- struct udphdr *pudp = udp_hdr(skb);
-
- pudp->check = 0;
- skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
- pudp->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
- skb->len - offset, IPPROTO_UDP,
- skb->csum);
- }
-}
-
-#if IS_ENABLED(CONFIG_IPV6)
-static inline void vnet_fullcsum_ipv6(struct sk_buff *skb)
-{
- struct ipv6hdr *ip6h = ipv6_hdr(skb);
- int offset = skb_transport_offset(skb);
-
- if (skb->protocol != htons(ETH_P_IPV6))
- return;
- if (ip6h->nexthdr != IPPROTO_TCP &&
- ip6h->nexthdr != IPPROTO_UDP)
- return;
- skb->ip_summed = CHECKSUM_NONE;
- skb->csum_level = 1;
- skb->csum = 0;
- if (ip6h->nexthdr == IPPROTO_TCP) {
- struct tcphdr *ptcp = tcp_hdr(skb);
-
- ptcp->check = 0;
- skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
- ptcp->check = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
- skb->len - offset, IPPROTO_TCP,
- skb->csum);
- } else if (ip6h->nexthdr == IPPROTO_UDP) {
- struct udphdr *pudp = udp_hdr(skb);
-
- pudp->check = 0;
- skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
- pudp->check = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
- skb->len - offset, IPPROTO_UDP,
- skb->csum);
- }
-}
-#endif
-
-static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc)
-{
- struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
- unsigned int len = desc->size;
- unsigned int copy_len;
- struct sk_buff *skb;
- int maxlen;
- int err;
-
- err = -EMSGSIZE;
- if (port->tso && port->tsolen > port->rmtu)
- maxlen = port->tsolen;
- else
- maxlen = port->rmtu;
- if (unlikely(len < ETH_ZLEN || len > maxlen)) {
- dev->stats.rx_length_errors++;
- goto out_dropped;
- }
-
- skb = alloc_and_align_skb(dev, len);
- err = -ENOMEM;
- if (unlikely(!skb)) {
- dev->stats.rx_missed_errors++;
- goto out_dropped;
- }
-
- copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U;
- skb_put(skb, copy_len);
- err = ldc_copy(port->vio.lp, LDC_COPY_IN,
- skb->data, copy_len, 0,
- desc->cookies, desc->ncookies);
- if (unlikely(err < 0)) {
- dev->stats.rx_frame_errors++;
- goto out_free_skb;
- }
-
- skb_pull(skb, VNET_PACKET_SKIP);
- skb_trim(skb, len);
- skb->protocol = eth_type_trans(skb, dev);
-
- if (vio_version_after_eq(&port->vio, 1, 8)) {
- struct vio_net_dext *dext = vio_net_ext(desc);
-
- skb_reset_network_header(skb);
-
- if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM) {
- if (skb->protocol == ETH_P_IP) {
- struct iphdr *iph = ip_hdr(skb);
-
- iph->check = 0;
- ip_send_check(iph);
- }
- }
- if ((dext->flags & VNET_PKT_HCK_FULLCKSUM) &&
- skb->ip_summed == CHECKSUM_NONE) {
- if (skb->protocol == htons(ETH_P_IP)) {
- struct iphdr *iph = ip_hdr(skb);
- int ihl = iph->ihl * 4;
-
- skb_set_transport_header(skb, ihl);
- vnet_fullcsum_ipv4(skb);
-#if IS_ENABLED(CONFIG_IPV6)
- } else if (skb->protocol == htons(ETH_P_IPV6)) {
- skb_set_transport_header(skb,
- sizeof(struct ipv6hdr));
- vnet_fullcsum_ipv6(skb);
-#endif
- }
- }
- if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM_OK) {
- skb->ip_summed = CHECKSUM_PARTIAL;
- skb->csum_level = 0;
- if (dext->flags & VNET_PKT_HCK_FULLCKSUM_OK)
- skb->csum_level = 1;
- }
- }
-
- skb->ip_summed = port->switch_port ? CHECKSUM_NONE : CHECKSUM_PARTIAL;
-
- if (unlikely(is_multicast_ether_addr(eth_hdr(skb)->h_dest)))
- dev->stats.multicast++;
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += len;
- port->stats.rx_packets++;
- port->stats.rx_bytes += len;
- napi_gro_receive(&port->napi, skb);
- return 0;
-
-out_free_skb:
- kfree_skb(skb);
-
-out_dropped:
- dev->stats.rx_dropped++;
- return err;
-}
-
-static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr,
- u32 start, u32 end, u8 vio_dring_state)
-{
- struct vio_dring_data hdr = {
- .tag = {
- .type = VIO_TYPE_DATA,
- .stype = VIO_SUBTYPE_ACK,
- .stype_env = VIO_DRING_DATA,
- .sid = vio_send_sid(&port->vio),
- },
- .dring_ident = dr->ident,
- .start_idx = start,
- .end_idx = end,
- .state = vio_dring_state,
- };
- int err, delay;
- int retries = 0;
-
- hdr.seq = dr->snd_nxt;
- delay = 1;
- do {
- err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
- if (err > 0) {
- dr->snd_nxt++;
- break;
- }
- udelay(delay);
- if ((delay <<= 1) > 128)
- delay = 128;
- if (retries++ > VNET_MAX_RETRIES) {
- pr_info("ECONNRESET %x:%x:%x:%x:%x:%x\n",
- port->raddr[0], port->raddr[1],
- port->raddr[2], port->raddr[3],
- port->raddr[4], port->raddr[5]);
- break;
- }
- } while (err == -EAGAIN);
-
- if (err <= 0 && vio_dring_state == VIO_DRING_STOPPED) {
- port->stop_rx_idx = end;
- port->stop_rx = true;
- } else {
- port->stop_rx_idx = 0;
- port->stop_rx = false;
- }
-
- return err;
-}
-
-static struct vio_net_desc *get_rx_desc(struct vnet_port *port,
- struct vio_dring_state *dr,
- u32 index)
-{
- struct vio_net_desc *desc = port->vio.desc_buf;
- int err;
-
- err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size,
- (index * dr->entry_size),
- dr->cookies, dr->ncookies);
- if (err < 0)
- return ERR_PTR(err);
-
- return desc;
-}
-
-static int put_rx_desc(struct vnet_port *port,
- struct vio_dring_state *dr,
- struct vio_net_desc *desc,
- u32 index)
-{
- int err;
-
- err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size,
- (index * dr->entry_size),
- dr->cookies, dr->ncookies);
- if (err < 0)
- return err;
-
- return 0;
-}
-
-static int vnet_walk_rx_one(struct vnet_port *port,
- struct vio_dring_state *dr,
- u32 index, int *needs_ack)
-{
- struct vio_net_desc *desc = get_rx_desc(port, dr, index);
- struct vio_driver_state *vio = &port->vio;
- int err;
-
- BUG_ON(!desc);
- if (IS_ERR(desc))
- return PTR_ERR(desc);
-
- if (desc->hdr.state != VIO_DESC_READY)
- return 1;
-
- dma_rmb();
-
- viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n",
- desc->hdr.state, desc->hdr.ack,
- desc->size, desc->ncookies,
- desc->cookies[0].cookie_addr,
- desc->cookies[0].cookie_size);
-
- err = vnet_rx_one(port, desc);
- if (err == -ECONNRESET)
- return err;
- trace_vnet_rx_one(port->vio._local_sid, port->vio._peer_sid,
- index, desc->hdr.ack);
- desc->hdr.state = VIO_DESC_DONE;
- err = put_rx_desc(port, dr, desc, index);
- if (err < 0)
- return err;
- *needs_ack = desc->hdr.ack;
- return 0;
-}
-
-static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr,
- u32 start, u32 end, int *npkts, int budget)
-{
- struct vio_driver_state *vio = &port->vio;
- int ack_start = -1, ack_end = -1;
- bool send_ack = true;
-
- end = (end == (u32)-1) ? vio_dring_prev(dr, start)
- : vio_dring_next(dr, end);
-
- viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end);
-
- while (start != end) {
- int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack);
-
- if (err == -ECONNRESET)
- return err;
- if (err != 0)
- break;
- (*npkts)++;
- if (ack_start == -1)
- ack_start = start;
- ack_end = start;
- start = vio_dring_next(dr, start);
- if (ack && start != end) {
- err = vnet_send_ack(port, dr, ack_start, ack_end,
- VIO_DRING_ACTIVE);
- if (err == -ECONNRESET)
- return err;
- ack_start = -1;
- }
- if ((*npkts) >= budget) {
- send_ack = false;
- break;
- }
- }
- if (unlikely(ack_start == -1)) {
- ack_end = vio_dring_prev(dr, start);
- ack_start = ack_end;
- }
- if (send_ack) {
- port->napi_resume = false;
- trace_vnet_tx_send_stopped_ack(port->vio._local_sid,
- port->vio._peer_sid,
- ack_end, *npkts);
- return vnet_send_ack(port, dr, ack_start, ack_end,
- VIO_DRING_STOPPED);
- } else {
- trace_vnet_tx_defer_stopped_ack(port->vio._local_sid,
- port->vio._peer_sid,
- ack_end, *npkts);
- port->napi_resume = true;
- port->napi_stop_idx = ack_end;
- return 1;
- }
-}
-
-static int vnet_rx(struct vnet_port *port, void *msgbuf, int *npkts,
- int budget)
-{
- struct vio_dring_data *pkt = msgbuf;
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING];
- struct vio_driver_state *vio = &port->vio;
-
- viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016llx] rcv_nxt[%016llx]\n",
- pkt->tag.stype_env, pkt->seq, dr->rcv_nxt);
-
- if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
- return 0;
- if (unlikely(pkt->seq != dr->rcv_nxt)) {
- pr_err("RX out of sequence seq[0x%llx] rcv_nxt[0x%llx]\n",
- pkt->seq, dr->rcv_nxt);
- return 0;
- }
-
- if (!port->napi_resume)
- dr->rcv_nxt++;
-
- /* XXX Validate pkt->start_idx and pkt->end_idx XXX */
-
- return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx,
- npkts, budget);
-}
-
-static int idx_is_pending(struct vio_dring_state *dr, u32 end)
-{
- u32 idx = dr->cons;
- int found = 0;
-
- while (idx != dr->prod) {
- if (idx == end) {
- found = 1;
- break;
- }
- idx = vio_dring_next(dr, idx);
- }
- return found;
-}
-
-static int vnet_ack(struct vnet_port *port, void *msgbuf)
-{
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
- struct vio_dring_data *pkt = msgbuf;
- struct net_device *dev;
- u32 end;
- struct vio_net_desc *desc;
- struct netdev_queue *txq;
-
- if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
- return 0;
-
- end = pkt->end_idx;
- dev = VNET_PORT_TO_NET_DEVICE(port);
- netif_tx_lock(dev);
- if (unlikely(!idx_is_pending(dr, end))) {
- netif_tx_unlock(dev);
- return 0;
- }
-
- /* sync for race conditions with vnet_start_xmit() and tell xmit it
- * is time to send a trigger.
- */
- trace_vnet_rx_stopped_ack(port->vio._local_sid,
- port->vio._peer_sid, end);
- dr->cons = vio_dring_next(dr, end);
- desc = vio_dring_entry(dr, dr->cons);
- if (desc->hdr.state == VIO_DESC_READY && !port->start_cons) {
- /* vnet_start_xmit() just populated this dring but missed
- * sending the "start" LDC message to the consumer.
- * Send a "start" trigger on its behalf.
- */
- if (__vnet_tx_trigger(port, dr->cons) > 0)
- port->start_cons = false;
- else
- port->start_cons = true;
- } else {
- port->start_cons = true;
- }
- netif_tx_unlock(dev);
-
- txq = netdev_get_tx_queue(dev, port->q_index);
- if (unlikely(netif_tx_queue_stopped(txq) &&
- vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr)))
- return 1;
-
- return 0;
-}
-
-static int vnet_nack(struct vnet_port *port, void *msgbuf)
-{
- /* XXX just reset or similar XXX */
- return 0;
-}
-
-static int handle_mcast(struct vnet_port *port, void *msgbuf)
-{
- struct vio_net_mcast_info *pkt = msgbuf;
- struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
-
- if (pkt->tag.stype != VIO_SUBTYPE_ACK)
- pr_err("%s: Got unexpected MCAST reply [%02x:%02x:%04x:%08x]\n",
- dev->name,
- pkt->tag.type,
- pkt->tag.stype,
- pkt->tag.stype_env,
- pkt->tag.sid);
-
- return 0;
-}
-
-/* If the queue is stopped, wake it up so that we'll
- * send out another START message at the next TX.
- */
-static void maybe_tx_wakeup(struct vnet_port *port)
-{
- struct netdev_queue *txq;
-
- txq = netdev_get_tx_queue(VNET_PORT_TO_NET_DEVICE(port),
- port->q_index);
- __netif_tx_lock(txq, smp_processor_id());
- if (likely(netif_tx_queue_stopped(txq)))
- netif_tx_wake_queue(txq);
- __netif_tx_unlock(txq);
-}
-
-bool sunvnet_port_is_up_common(struct vnet_port *vnet)
-{
- struct vio_driver_state *vio = &vnet->vio;
-
- return !!(vio->hs_state & VIO_HS_COMPLETE);
-}
-EXPORT_SYMBOL_GPL(sunvnet_port_is_up_common);
-
-static int vnet_event_napi(struct vnet_port *port, int budget)
-{
- struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
- struct vio_driver_state *vio = &port->vio;
- int tx_wakeup, err;
- int npkts = 0;
-
- /* we don't expect any other bits */
- BUG_ON(port->rx_event & ~(LDC_EVENT_DATA_READY |
- LDC_EVENT_RESET |
- LDC_EVENT_UP));
-
- /* RESET takes precedent over any other event */
- if (port->rx_event & LDC_EVENT_RESET) {
- /* a link went down */
-
- if (port->vsw == 1) {
- netif_tx_stop_all_queues(dev);
- netif_carrier_off(dev);
- }
-
- vio_link_state_change(vio, LDC_EVENT_RESET);
- vnet_port_reset(port);
- vio_port_up(vio);
-
- /* If the device is running but its tx queue was
- * stopped (due to flow control), restart it.
- * This is necessary since vnet_port_reset()
- * clears the tx drings and thus we may never get
- * back a VIO_TYPE_DATA ACK packet - which is
- * the normal mechanism to restart the tx queue.
- */
- if (netif_running(dev))
- maybe_tx_wakeup(port);
-
- port->rx_event = 0;
- port->stats.event_reset++;
- return 0;
- }
-
- if (port->rx_event & LDC_EVENT_UP) {
- /* a link came up */
-
- if (port->vsw == 1) {
- netif_carrier_on(port->dev);
- netif_tx_start_all_queues(port->dev);
- }
-
- vio_link_state_change(vio, LDC_EVENT_UP);
- port->rx_event = 0;
- port->stats.event_up++;
- return 0;
- }
-
- err = 0;
- tx_wakeup = 0;
- while (1) {
- union {
- struct vio_msg_tag tag;
- u64 raw[8];
- } msgbuf;
-
- if (port->napi_resume) {
- struct vio_dring_data *pkt =
- (struct vio_dring_data *)&msgbuf;
- struct vio_dring_state *dr =
- &port->vio.drings[VIO_DRIVER_RX_RING];
-
- pkt->tag.type = VIO_TYPE_DATA;
- pkt->tag.stype = VIO_SUBTYPE_INFO;
- pkt->tag.stype_env = VIO_DRING_DATA;
- pkt->seq = dr->rcv_nxt;
- pkt->start_idx = vio_dring_next(dr,
- port->napi_stop_idx);
- pkt->end_idx = -1;
- } else {
- err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf));
- if (unlikely(err < 0)) {
- if (err == -ECONNRESET)
- vio_conn_reset(vio);
- break;
- }
- if (err == 0)
- break;
- viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n",
- msgbuf.tag.type,
- msgbuf.tag.stype,
- msgbuf.tag.stype_env,
- msgbuf.tag.sid);
- err = vio_validate_sid(vio, &msgbuf.tag);
- if (err < 0)
- break;
- }
-
- if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) {
- if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) {
- if (!sunvnet_port_is_up_common(port)) {
- /* failures like handshake_failure()
- * may have cleaned up dring, but
- * NAPI polling may bring us here.
- */
- err = -ECONNRESET;
- break;
- }
- err = vnet_rx(port, &msgbuf, &npkts, budget);
- if (npkts >= budget)
- break;
- if (npkts == 0)
- break;
- } else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) {
- err = vnet_ack(port, &msgbuf);
- if (err > 0)
- tx_wakeup |= err;
- } else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) {
- err = vnet_nack(port, &msgbuf);
- }
- } else if (msgbuf.tag.type == VIO_TYPE_CTRL) {
- if (msgbuf.tag.stype_env == VNET_MCAST_INFO)
- err = handle_mcast(port, &msgbuf);
- else
- err = vio_control_pkt_engine(vio, &msgbuf);
- if (err)
- break;
- } else {
- err = vnet_handle_unknown(port, &msgbuf);
- }
- if (err == -ECONNRESET)
- break;
- }
- if (unlikely(tx_wakeup && err != -ECONNRESET))
- maybe_tx_wakeup(port);
- return npkts;
-}
-
-int sunvnet_poll_common(struct napi_struct *napi, int budget)
-{
- struct vnet_port *port = container_of(napi, struct vnet_port, napi);
- struct vio_driver_state *vio = &port->vio;
- int processed = vnet_event_napi(port, budget);
-
- if (processed < budget) {
- napi_complete_done(napi, processed);
- port->rx_event &= ~LDC_EVENT_DATA_READY;
- vio_set_intr(vio->vdev->rx_ino, HV_INTR_ENABLED);
- }
- return processed;
-}
-EXPORT_SYMBOL_GPL(sunvnet_poll_common);
-
-void sunvnet_event_common(void *arg, int event)
-{
- struct vnet_port *port = arg;
- struct vio_driver_state *vio = &port->vio;
-
- port->rx_event |= event;
- vio_set_intr(vio->vdev->rx_ino, HV_INTR_DISABLED);
- napi_schedule(&port->napi);
-}
-EXPORT_SYMBOL_GPL(sunvnet_event_common);
-
-static int __vnet_tx_trigger(struct vnet_port *port, u32 start)
-{
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
- struct vio_dring_data hdr = {
- .tag = {
- .type = VIO_TYPE_DATA,
- .stype = VIO_SUBTYPE_INFO,
- .stype_env = VIO_DRING_DATA,
- .sid = vio_send_sid(&port->vio),
- },
- .dring_ident = dr->ident,
- .start_idx = start,
- .end_idx = (u32)-1,
- };
- int err, delay;
- int retries = 0;
-
- if (port->stop_rx) {
- trace_vnet_tx_pending_stopped_ack(port->vio._local_sid,
- port->vio._peer_sid,
- port->stop_rx_idx, -1);
- err = vnet_send_ack(port,
- &port->vio.drings[VIO_DRIVER_RX_RING],
- port->stop_rx_idx, -1,
- VIO_DRING_STOPPED);
- if (err <= 0)
- return err;
- }
-
- hdr.seq = dr->snd_nxt;
- delay = 1;
- do {
- err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
- if (err > 0) {
- dr->snd_nxt++;
- break;
- }
- udelay(delay);
- if ((delay <<= 1) > 128)
- delay = 128;
- if (retries++ > VNET_MAX_RETRIES)
- break;
- } while (err == -EAGAIN);
- trace_vnet_tx_trigger(port->vio._local_sid,
- port->vio._peer_sid, start, err);
-
- return err;
-}
-
-static struct sk_buff *vnet_clean_tx_ring(struct vnet_port *port,
- unsigned *pending)
-{
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
- struct sk_buff *skb = NULL;
- int i, txi;
-
- *pending = 0;
-
- txi = dr->prod;
- for (i = 0; i < VNET_TX_RING_SIZE; ++i) {
- struct vio_net_desc *d;
-
- --txi;
- if (txi < 0)
- txi = VNET_TX_RING_SIZE - 1;
-
- d = vio_dring_entry(dr, txi);
-
- if (d->hdr.state == VIO_DESC_READY) {
- (*pending)++;
- continue;
- }
- if (port->tx_bufs[txi].skb) {
- if (d->hdr.state != VIO_DESC_DONE)
- pr_notice("invalid ring buffer state %d\n",
- d->hdr.state);
- BUG_ON(port->tx_bufs[txi].skb->next);
-
- port->tx_bufs[txi].skb->next = skb;
- skb = port->tx_bufs[txi].skb;
- port->tx_bufs[txi].skb = NULL;
-
- ldc_unmap(port->vio.lp,
- port->tx_bufs[txi].cookies,
- port->tx_bufs[txi].ncookies);
- } else if (d->hdr.state == VIO_DESC_FREE) {
- break;
- }
- d->hdr.state = VIO_DESC_FREE;
- }
- return skb;
-}
-
-static inline void vnet_free_skbs(struct sk_buff *skb)
-{
- struct sk_buff *next;
-
- while (skb) {
- next = skb->next;
- skb->next = NULL;
- dev_kfree_skb(skb);
- skb = next;
- }
-}
-
-void sunvnet_clean_timer_expire_common(struct timer_list *t)
-{
- struct vnet_port *port = from_timer(port, t, clean_timer);
- struct sk_buff *freeskbs;
- unsigned pending;
-
- netif_tx_lock(VNET_PORT_TO_NET_DEVICE(port));
- freeskbs = vnet_clean_tx_ring(port, &pending);
- netif_tx_unlock(VNET_PORT_TO_NET_DEVICE(port));
-
- vnet_free_skbs(freeskbs);
-
- if (pending)
- (void)mod_timer(&port->clean_timer,
- jiffies + VNET_CLEAN_TIMEOUT);
- else
- del_timer(&port->clean_timer);
-}
-EXPORT_SYMBOL_GPL(sunvnet_clean_timer_expire_common);
-
-static inline int vnet_skb_map(struct ldc_channel *lp, struct sk_buff *skb,
- struct ldc_trans_cookie *cookies, int ncookies,
- unsigned int map_perm)
-{
- int i, nc, err, blen;
-
- /* header */
- blen = skb_headlen(skb);
- if (blen < ETH_ZLEN)
- blen = ETH_ZLEN;
- blen += VNET_PACKET_SKIP;
- blen += 8 - (blen & 7);
-
- err = ldc_map_single(lp, skb->data - VNET_PACKET_SKIP, blen, cookies,
- ncookies, map_perm);
- if (err < 0)
- return err;
- nc = err;
-
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
- skb_frag_t *f = &skb_shinfo(skb)->frags[i];
- u8 *vaddr;
-
- if (nc < ncookies) {
- vaddr = kmap_local_page(skb_frag_page(f));
- blen = skb_frag_size(f);
- blen += 8 - (blen & 7);
- err = ldc_map_single(lp, vaddr + skb_frag_off(f),
- blen, cookies + nc, ncookies - nc,
- map_perm);
- kunmap_local(vaddr);
- } else {
- err = -EMSGSIZE;
- }
-
- if (err < 0) {
- ldc_unmap(lp, cookies, nc);
- return err;
- }
- nc += err;
- }
- return nc;
-}
-
-static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, int ncookies)
-{
- struct sk_buff *nskb;
- int i, len, pad, docopy;
-
- len = skb->len;
- pad = 0;
- if (len < ETH_ZLEN) {
- pad += ETH_ZLEN - skb->len;
- len += pad;
- }
- len += VNET_PACKET_SKIP;
- pad += 8 - (len & 7);
-
- /* make sure we have enough cookies and alignment in every frag */
- docopy = skb_shinfo(skb)->nr_frags >= ncookies;
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
- skb_frag_t *f = &skb_shinfo(skb)->frags[i];
-
- docopy |= skb_frag_off(f) & 7;
- }
- if (((unsigned long)skb->data & 7) != VNET_PACKET_SKIP ||
- skb_tailroom(skb) < pad ||
- skb_headroom(skb) < VNET_PACKET_SKIP || docopy) {
- int start = 0, offset;
- __wsum csum;
-
- len = skb->len > ETH_ZLEN ? skb->len : ETH_ZLEN;
- nskb = alloc_and_align_skb(skb->dev, len);
- if (!nskb) {
- dev_kfree_skb(skb);
- return NULL;
- }
- skb_reserve(nskb, VNET_PACKET_SKIP);
-
- nskb->protocol = skb->protocol;
- offset = skb_mac_header(skb) - skb->data;
- skb_set_mac_header(nskb, offset);
- offset = skb_network_header(skb) - skb->data;
- skb_set_network_header(nskb, offset);
- offset = skb_transport_header(skb) - skb->data;
- skb_set_transport_header(nskb, offset);
-
- offset = 0;
- nskb->csum_offset = skb->csum_offset;
- nskb->ip_summed = skb->ip_summed;
-
- if (skb->ip_summed == CHECKSUM_PARTIAL)
- start = skb_checksum_start_offset(skb);
- if (start) {
- int offset = start + nskb->csum_offset;
-
- /* copy the headers, no csum here */
- if (skb_copy_bits(skb, 0, nskb->data, start)) {
- dev_kfree_skb(nskb);
- dev_kfree_skb(skb);
- return NULL;
- }
-
- /* copy the rest, with csum calculation */
- *(__sum16 *)(skb->data + offset) = 0;
- csum = skb_copy_and_csum_bits(skb, start,
- nskb->data + start,
- skb->len - start);
-
- /* add in the header checksums */
- if (skb->protocol == htons(ETH_P_IP)) {
- struct iphdr *iph = ip_hdr(nskb);
-
- if (iph->protocol == IPPROTO_TCP ||
- iph->protocol == IPPROTO_UDP) {
- csum = csum_tcpudp_magic(iph->saddr,
- iph->daddr,
- skb->len - start,
- iph->protocol,
- csum);
- }
- } else if (skb->protocol == htons(ETH_P_IPV6)) {
- struct ipv6hdr *ip6h = ipv6_hdr(nskb);
-
- if (ip6h->nexthdr == IPPROTO_TCP ||
- ip6h->nexthdr == IPPROTO_UDP) {
- csum = csum_ipv6_magic(&ip6h->saddr,
- &ip6h->daddr,
- skb->len - start,
- ip6h->nexthdr,
- csum);
- }
- }
-
- /* save the final result */
- *(__sum16 *)(nskb->data + offset) = csum;
-
- nskb->ip_summed = CHECKSUM_NONE;
- } else if (skb_copy_bits(skb, 0, nskb->data, skb->len)) {
- dev_kfree_skb(nskb);
- dev_kfree_skb(skb);
- return NULL;
- }
- (void)skb_put(nskb, skb->len);
- if (skb_is_gso(skb)) {
- skb_shinfo(nskb)->gso_size = skb_shinfo(skb)->gso_size;
- skb_shinfo(nskb)->gso_type = skb_shinfo(skb)->gso_type;
- }
- nskb->queue_mapping = skb->queue_mapping;
- dev_kfree_skb(skb);
- skb = nskb;
- }
- return skb;
-}
-
-static netdev_tx_t
-vnet_handle_offloads(struct vnet_port *port, struct sk_buff *skb,
- struct vnet_port *(*vnet_tx_port)
- (struct sk_buff *, struct net_device *))
-{
- struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
- struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
- struct sk_buff *segs, *curr, *next;
- int maclen, datalen;
- int status;
- int gso_size, gso_type, gso_segs;
- int hlen = skb_transport_header(skb) - skb_mac_header(skb);
- int proto = IPPROTO_IP;
-
- if (skb->protocol == htons(ETH_P_IP))
- proto = ip_hdr(skb)->protocol;
- else if (skb->protocol == htons(ETH_P_IPV6))
- proto = ipv6_hdr(skb)->nexthdr;
-
- if (proto == IPPROTO_TCP) {
- hlen += tcp_hdr(skb)->doff * 4;
- } else if (proto == IPPROTO_UDP) {
- hlen += sizeof(struct udphdr);
- } else {
- pr_err("vnet_handle_offloads GSO with unknown transport "
- "protocol %d tproto %d\n", skb->protocol, proto);
- hlen = 128; /* XXX */
- }
- datalen = port->tsolen - hlen;
-
- gso_size = skb_shinfo(skb)->gso_size;
- gso_type = skb_shinfo(skb)->gso_type;
- gso_segs = skb_shinfo(skb)->gso_segs;
-
- if (port->tso && gso_size < datalen)
- gso_segs = DIV_ROUND_UP(skb->len - hlen, datalen);
-
- if (unlikely(vnet_tx_dring_avail(dr) < gso_segs)) {
- struct netdev_queue *txq;
-
- txq = netdev_get_tx_queue(dev, port->q_index);
- netif_tx_stop_queue(txq);
- if (vnet_tx_dring_avail(dr) < skb_shinfo(skb)->gso_segs)
- return NETDEV_TX_BUSY;
- netif_tx_wake_queue(txq);
- }
-
- maclen = skb_network_header(skb) - skb_mac_header(skb);
- skb_pull(skb, maclen);
-
- if (port->tso && gso_size < datalen) {
- if (skb_unclone(skb, GFP_ATOMIC))
- goto out_dropped;
-
- /* segment to TSO size */
- skb_shinfo(skb)->gso_size = datalen;
- skb_shinfo(skb)->gso_segs = gso_segs;
- }
- segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO);
- if (IS_ERR(segs))
- goto out_dropped;
-
- skb_push(skb, maclen);
- skb_reset_mac_header(skb);
-
- status = 0;
- skb_list_walk_safe(segs, curr, next) {
- skb_mark_not_on_list(curr);
- if (port->tso && curr->len > dev->mtu) {
- skb_shinfo(curr)->gso_size = gso_size;
- skb_shinfo(curr)->gso_type = gso_type;
- skb_shinfo(curr)->gso_segs =
- DIV_ROUND_UP(curr->len - hlen, gso_size);
- } else {
- skb_shinfo(curr)->gso_size = 0;
- }
-
- skb_push(curr, maclen);
- skb_reset_mac_header(curr);
- memcpy(skb_mac_header(curr), skb_mac_header(skb),
- maclen);
- curr->csum_start = skb_transport_header(curr) - curr->head;
- if (ip_hdr(curr)->protocol == IPPROTO_TCP)
- curr->csum_offset = offsetof(struct tcphdr, check);
- else if (ip_hdr(curr)->protocol == IPPROTO_UDP)
- curr->csum_offset = offsetof(struct udphdr, check);
-
- if (!(status & NETDEV_TX_MASK))
- status = sunvnet_start_xmit_common(curr, dev,
- vnet_tx_port);
- if (status & NETDEV_TX_MASK)
- dev_kfree_skb_any(curr);
- }
-
- if (!(status & NETDEV_TX_MASK))
- dev_kfree_skb_any(skb);
- return status;
-out_dropped:
- dev->stats.tx_dropped++;
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
-}
-
-netdev_tx_t
-sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
- struct vnet_port *(*vnet_tx_port)
- (struct sk_buff *, struct net_device *))
-{
- struct vnet_port *port = NULL;
- struct vio_dring_state *dr;
- struct vio_net_desc *d;
- unsigned int len;
- struct sk_buff *freeskbs = NULL;
- int i, err, txi;
- unsigned pending = 0;
- struct netdev_queue *txq;
-
- rcu_read_lock();
- port = vnet_tx_port(skb, dev);
- if (unlikely(!port))
- goto out_dropped;
-
- if (skb_is_gso(skb) && skb->len > port->tsolen) {
- err = vnet_handle_offloads(port, skb, vnet_tx_port);
- rcu_read_unlock();
- return err;
- }
-
- if (!skb_is_gso(skb) && skb->len > port->rmtu) {
- unsigned long localmtu = port->rmtu - ETH_HLEN;
-
- if (vio_version_after_eq(&port->vio, 1, 3))
- localmtu -= VLAN_HLEN;
-
- if (skb->protocol == htons(ETH_P_IP))
- icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
- htonl(localmtu));
-#if IS_ENABLED(CONFIG_IPV6)
- else if (skb->protocol == htons(ETH_P_IPV6))
- icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu);
-#endif
- goto out_dropped;
- }
-
- skb = vnet_skb_shape(skb, 2);
-
- if (unlikely(!skb))
- goto out_dropped;
-
- if (skb->ip_summed == CHECKSUM_PARTIAL) {
- if (skb->protocol == htons(ETH_P_IP))
- vnet_fullcsum_ipv4(skb);
-#if IS_ENABLED(CONFIG_IPV6)
- else if (skb->protocol == htons(ETH_P_IPV6))
- vnet_fullcsum_ipv6(skb);
-#endif
- }
-
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
- i = skb_get_queue_mapping(skb);
- txq = netdev_get_tx_queue(dev, i);
- if (unlikely(vnet_tx_dring_avail(dr) < 1)) {
- if (!netif_tx_queue_stopped(txq)) {
- netif_tx_stop_queue(txq);
-
- /* This is a hard error, log it. */
- netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
- dev->stats.tx_errors++;
- }
- rcu_read_unlock();
- return NETDEV_TX_BUSY;
- }
-
- d = vio_dring_cur(dr);
-
- txi = dr->prod;
-
- freeskbs = vnet_clean_tx_ring(port, &pending);
-
- BUG_ON(port->tx_bufs[txi].skb);
-
- len = skb->len;
- if (len < ETH_ZLEN)
- len = ETH_ZLEN;
-
- err = vnet_skb_map(port->vio.lp, skb, port->tx_bufs[txi].cookies, 2,
- (LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_RW));
- if (err < 0) {
- netdev_info(dev, "tx buffer map error %d\n", err);
- goto out_dropped;
- }
-
- port->tx_bufs[txi].skb = skb;
- skb = NULL;
- port->tx_bufs[txi].ncookies = err;
-
- /* We don't rely on the ACKs to free the skb in vnet_start_xmit(),
- * thus it is safe to not set VIO_ACK_ENABLE for each transmission:
- * the protocol itself does not require it as long as the peer
- * sends a VIO_SUBTYPE_ACK for VIO_DRING_STOPPED.
- *
- * An ACK for every packet in the ring is expensive as the
- * sending of LDC messages is slow and affects performance.
- */
- d->hdr.ack = VIO_ACK_DISABLE;
- d->size = len;
- d->ncookies = port->tx_bufs[txi].ncookies;
- for (i = 0; i < d->ncookies; i++)
- d->cookies[i] = port->tx_bufs[txi].cookies[i];
- if (vio_version_after_eq(&port->vio, 1, 7)) {
- struct vio_net_dext *dext = vio_net_ext(d);
-
- memset(dext, 0, sizeof(*dext));
- if (skb_is_gso(port->tx_bufs[txi].skb)) {
- dext->ipv4_lso_mss = skb_shinfo(port->tx_bufs[txi].skb)
- ->gso_size;
- dext->flags |= VNET_PKT_IPV4_LSO;
- }
- if (vio_version_after_eq(&port->vio, 1, 8) &&
- !port->switch_port) {
- dext->flags |= VNET_PKT_HCK_IPV4_HDRCKSUM_OK;
- dext->flags |= VNET_PKT_HCK_FULLCKSUM_OK;
- }
- }
-
- /* This has to be a non-SMP write barrier because we are writing
- * to memory which is shared with the peer LDOM.
- */
- dma_wmb();
-
- d->hdr.state = VIO_DESC_READY;
-
- /* Exactly one ldc "start" trigger (for dr->cons) needs to be sent
- * to notify the consumer that some descriptors are READY.
- * After that "start" trigger, no additional triggers are needed until
- * a DRING_STOPPED is received from the consumer. The dr->cons field
- * (set up by vnet_ack()) has the value of the next dring index
- * that has not yet been ack-ed. We send a "start" trigger here
- * if, and only if, start_cons is true (reset it afterward). Conversely,
- * vnet_ack() should check if the dring corresponding to cons
- * is marked READY, but start_cons was false.
- * If so, vnet_ack() should send out the missed "start" trigger.
- *
- * Note that the dma_wmb() above makes sure the cookies et al. are
- * not globally visible before the VIO_DESC_READY, and that the
- * stores are ordered correctly by the compiler. The consumer will
- * not proceed until the VIO_DESC_READY is visible assuring that
- * the consumer does not observe anything related to descriptors
- * out of order. The HV trap from the LDC start trigger is the
- * producer to consumer announcement that work is available to the
- * consumer
- */
- if (!port->start_cons) { /* previous trigger suffices */
- trace_vnet_skip_tx_trigger(port->vio._local_sid,
- port->vio._peer_sid, dr->cons);
- goto ldc_start_done;
- }
-
- err = __vnet_tx_trigger(port, dr->cons);
- if (unlikely(err < 0)) {
- netdev_info(dev, "TX trigger error %d\n", err);
- d->hdr.state = VIO_DESC_FREE;
- skb = port->tx_bufs[txi].skb;
- port->tx_bufs[txi].skb = NULL;
- dev->stats.tx_carrier_errors++;
- goto out_dropped;
- }
-
-ldc_start_done:
- port->start_cons = false;
-
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += port->tx_bufs[txi].skb->len;
- port->stats.tx_packets++;
- port->stats.tx_bytes += port->tx_bufs[txi].skb->len;
-
- dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1);
- if (unlikely(vnet_tx_dring_avail(dr) < 1)) {
- netif_tx_stop_queue(txq);
- smp_rmb();
- if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr))
- netif_tx_wake_queue(txq);
- }
-
- (void)mod_timer(&port->clean_timer, jiffies + VNET_CLEAN_TIMEOUT);
- rcu_read_unlock();
-
- vnet_free_skbs(freeskbs);
-
- return NETDEV_TX_OK;
-
-out_dropped:
- if (pending)
- (void)mod_timer(&port->clean_timer,
- jiffies + VNET_CLEAN_TIMEOUT);
- else if (port)
- del_timer(&port->clean_timer);
- rcu_read_unlock();
- dev_kfree_skb(skb);
- vnet_free_skbs(freeskbs);
- dev->stats.tx_dropped++;
- return NETDEV_TX_OK;
-}
-EXPORT_SYMBOL_GPL(sunvnet_start_xmit_common);
-
-void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue)
-{
- /* XXX Implement me XXX */
-}
-EXPORT_SYMBOL_GPL(sunvnet_tx_timeout_common);
-
-int sunvnet_open_common(struct net_device *dev)
-{
- netif_carrier_on(dev);
- netif_tx_start_all_queues(dev);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(sunvnet_open_common);
-
-int sunvnet_close_common(struct net_device *dev)
-{
- netif_tx_stop_all_queues(dev);
- netif_carrier_off(dev);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(sunvnet_close_common);
-
-static struct vnet_mcast_entry *__vnet_mc_find(struct vnet *vp, u8 *addr)
-{
- struct vnet_mcast_entry *m;
-
- for (m = vp->mcast_list; m; m = m->next) {
- if (ether_addr_equal(m->addr, addr))
- return m;
- }
- return NULL;
-}
-
-static void __update_mc_list(struct vnet *vp, struct net_device *dev)
-{
- struct netdev_hw_addr *ha;
-
- netdev_for_each_mc_addr(ha, dev) {
- struct vnet_mcast_entry *m;
-
- m = __vnet_mc_find(vp, ha->addr);
- if (m) {
- m->hit = 1;
- continue;
- }
-
- if (!m) {
- m = kzalloc(sizeof(*m), GFP_ATOMIC);
- if (!m)
- continue;
- memcpy(m->addr, ha->addr, ETH_ALEN);
- m->hit = 1;
-
- m->next = vp->mcast_list;
- vp->mcast_list = m;
- }
- }
-}
-
-static void __send_mc_list(struct vnet *vp, struct vnet_port *port)
-{
- struct vio_net_mcast_info info;
- struct vnet_mcast_entry *m, **pp;
- int n_addrs;
-
- memset(&info, 0, sizeof(info));
-
- info.tag.type = VIO_TYPE_CTRL;
- info.tag.stype = VIO_SUBTYPE_INFO;
- info.tag.stype_env = VNET_MCAST_INFO;
- info.tag.sid = vio_send_sid(&port->vio);
- info.set = 1;
-
- n_addrs = 0;
- for (m = vp->mcast_list; m; m = m->next) {
- if (m->sent)
- continue;
- m->sent = 1;
- memcpy(&info.mcast_addr[n_addrs * ETH_ALEN],
- m->addr, ETH_ALEN);
- if (++n_addrs == VNET_NUM_MCAST) {
- info.count = n_addrs;
-
- (void)vio_ldc_send(&port->vio, &info,
- sizeof(info));
- n_addrs = 0;
- }
- }
- if (n_addrs) {
- info.count = n_addrs;
- (void)vio_ldc_send(&port->vio, &info, sizeof(info));
- }
-
- info.set = 0;
-
- n_addrs = 0;
- pp = &vp->mcast_list;
- while ((m = *pp) != NULL) {
- if (m->hit) {
- m->hit = 0;
- pp = &m->next;
- continue;
- }
-
- memcpy(&info.mcast_addr[n_addrs * ETH_ALEN],
- m->addr, ETH_ALEN);
- if (++n_addrs == VNET_NUM_MCAST) {
- info.count = n_addrs;
- (void)vio_ldc_send(&port->vio, &info,
- sizeof(info));
- n_addrs = 0;
- }
-
- *pp = m->next;
- kfree(m);
- }
- if (n_addrs) {
- info.count = n_addrs;
- (void)vio_ldc_send(&port->vio, &info, sizeof(info));
- }
-}
-
-void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp)
-{
- struct vnet_port *port;
-
- rcu_read_lock();
- list_for_each_entry_rcu(port, &vp->port_list, list) {
- if (port->switch_port) {
- __update_mc_list(vp, dev);
- __send_mc_list(vp, port);
- break;
- }
- }
- rcu_read_unlock();
-}
-EXPORT_SYMBOL_GPL(sunvnet_set_rx_mode_common);
-
-int sunvnet_set_mac_addr_common(struct net_device *dev, void *p)
-{
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(sunvnet_set_mac_addr_common);
-
-void sunvnet_port_free_tx_bufs_common(struct vnet_port *port)
-{
- struct vio_dring_state *dr;
- int i;
-
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-
- if (!dr->base)
- return;
-
- for (i = 0; i < VNET_TX_RING_SIZE; i++) {
- struct vio_net_desc *d;
- void *skb = port->tx_bufs[i].skb;
-
- if (!skb)
- continue;
-
- d = vio_dring_entry(dr, i);
-
- ldc_unmap(port->vio.lp,
- port->tx_bufs[i].cookies,
- port->tx_bufs[i].ncookies);
- dev_kfree_skb(skb);
- port->tx_bufs[i].skb = NULL;
- d->hdr.state = VIO_DESC_FREE;
- }
- ldc_free_exp_dring(port->vio.lp, dr->base,
- (dr->entry_size * dr->num_entries),
- dr->cookies, dr->ncookies);
- dr->base = NULL;
- dr->entry_size = 0;
- dr->num_entries = 0;
- dr->pending = 0;
- dr->ncookies = 0;
-}
-EXPORT_SYMBOL_GPL(sunvnet_port_free_tx_bufs_common);
-
-void vnet_port_reset(struct vnet_port *port)
-{
- del_timer(&port->clean_timer);
- sunvnet_port_free_tx_bufs_common(port);
- port->rmtu = 0;
- port->tso = (port->vsw == 0); /* no tso in vsw, misbehaves in bridge */
- port->tsolen = 0;
-}
-EXPORT_SYMBOL_GPL(vnet_port_reset);
-
-static int vnet_port_alloc_tx_ring(struct vnet_port *port)
-{
- struct vio_dring_state *dr;
- unsigned long len, elen;
- int i, err, ncookies;
- void *dring;
-
- dr = &port->vio.drings[VIO_DRIVER_TX_RING];
-
- elen = sizeof(struct vio_net_desc) +
- sizeof(struct ldc_trans_cookie) * 2;
- if (vio_version_after_eq(&port->vio, 1, 7))
- elen += sizeof(struct vio_net_dext);
- len = VNET_TX_RING_SIZE * elen;
-
- ncookies = VIO_MAX_RING_COOKIES;
- dring = ldc_alloc_exp_dring(port->vio.lp, len,
- dr->cookies, &ncookies,
- (LDC_MAP_SHADOW |
- LDC_MAP_DIRECT |
- LDC_MAP_RW));
- if (IS_ERR(dring)) {
- err = PTR_ERR(dring);
- goto err_out;
- }
-
- dr->base = dring;
- dr->entry_size = elen;
- dr->num_entries = VNET_TX_RING_SIZE;
- dr->prod = 0;
- dr->cons = 0;
- port->start_cons = true; /* need an initial trigger */
- dr->pending = VNET_TX_RING_SIZE;
- dr->ncookies = ncookies;
-
- for (i = 0; i < VNET_TX_RING_SIZE; ++i) {
- struct vio_net_desc *d;
-
- d = vio_dring_entry(dr, i);
- d->hdr.state = VIO_DESC_FREE;
- }
- return 0;
-
-err_out:
- sunvnet_port_free_tx_bufs_common(port);
-
- return err;
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp)
-{
- struct vnet_port *port;
- unsigned long flags;
-
- spin_lock_irqsave(&vp->lock, flags);
- if (!list_empty(&vp->port_list)) {
- port = list_entry(vp->port_list.next, struct vnet_port, list);
- napi_schedule(&port->napi);
- }
- spin_unlock_irqrestore(&vp->lock, flags);
-}
-EXPORT_SYMBOL_GPL(sunvnet_poll_controller_common);
-#endif
-
-void sunvnet_port_add_txq_common(struct vnet_port *port)
-{
- struct vnet *vp = port->vp;
- int smallest = 0;
- int i;
-
- /* find the first least-used q
- * When there are more ldoms than q's, we start to
- * double up on ports per queue.
- */
- for (i = 0; i < VNET_MAX_TXQS; i++) {
- if (vp->q_used[i] == 0) {
- smallest = i;
- break;
- }
- if (vp->q_used[i] < vp->q_used[smallest])
- smallest = i;
- }
-
- vp->nports++;
- vp->q_used[smallest]++;
- port->q_index = smallest;
-}
-EXPORT_SYMBOL_GPL(sunvnet_port_add_txq_common);
-
-void sunvnet_port_rm_txq_common(struct vnet_port *port)
-{
- port->vp->nports--;
- port->vp->q_used[port->q_index]--;
- port->q_index = 0;
-}
-EXPORT_SYMBOL_GPL(sunvnet_port_rm_txq_common);
diff --git a/drivers/net/ethernet/sun/sunvnet_common.h b/drivers/net/ethernet/sun/sunvnet_common.h
deleted file mode 100644
index 5416a3c..00000000
--- a/drivers/net/ethernet/sun/sunvnet_common.h
+++ /dev/null
@@ -1,157 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _SUNVNETCOMMON_H
-#define _SUNVNETCOMMON_H
-
-#include <linux/interrupt.h>
-
-/* length of time (or less) we expect pending descriptors to be marked
- * as VIO_DESC_DONE and skbs ready to be freed
- */
-#define VNET_CLEAN_TIMEOUT ((HZ / 100) + 1)
-
-#define VNET_MAXPACKET (65535ULL + ETH_HLEN + VLAN_HLEN)
-#define VNET_TX_RING_SIZE 512
-#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)
-
-#define VNET_MINTSO 2048 /* VIO protocol's minimum TSO len */
-#define VNET_MAXTSO 65535 /* VIO protocol's maximum TSO len */
-
-#define VNET_MAX_MTU 65535
-
-/* VNET packets are sent in buffers with the first 6 bytes skipped
- * so that after the ethernet header the IPv4/IPv6 headers are aligned
- * properly.
- */
-#define VNET_PACKET_SKIP 6
-
-#define VNET_MAXCOOKIES (VNET_MAXPACKET / PAGE_SIZE + 1)
-
-#define VNET_MAX_TXQS 16
-
-struct vnet_tx_entry {
- struct sk_buff *skb;
- unsigned int ncookies;
- struct ldc_trans_cookie cookies[VNET_MAXCOOKIES];
-};
-
-struct vnet;
-
-struct vnet_port_stats {
- /* keep them all the same size */
- u32 rx_bytes;
- u32 tx_bytes;
- u32 rx_packets;
- u32 tx_packets;
- u32 event_up;
- u32 event_reset;
- u32 q_placeholder;
-};
-
-#define NUM_VNET_PORT_STATS (sizeof(struct vnet_port_stats) / sizeof(u32))
-
-/* Structure to describe a vnet-port or vsw-port in the MD.
- * If the vsw bit is set, this structure represents a vswitch
- * port, and the net_device can be found from ->dev. If the
- * vsw bit is not set, the net_device is available from ->vp->dev.
- * See the VNET_PORT_TO_NET_DEVICE macro below.
- */
-struct vnet_port {
- struct vio_driver_state vio;
-
- struct vnet_port_stats stats;
-
- struct hlist_node hash;
- u8 raddr[ETH_ALEN];
- unsigned switch_port:1;
- unsigned tso:1;
- unsigned vsw:1;
- unsigned __pad:13;
-
- struct vnet *vp;
- struct net_device *dev;
-
- struct vnet_tx_entry tx_bufs[VNET_TX_RING_SIZE];
-
- struct list_head list;
-
- u32 stop_rx_idx;
- bool stop_rx;
- bool start_cons;
-
- struct timer_list clean_timer;
-
- u64 rmtu;
- u16 tsolen;
-
- struct napi_struct napi;
- u32 napi_stop_idx;
- bool napi_resume;
- int rx_event;
- u16 q_index;
-};
-
-static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
-{
- return container_of(vio, struct vnet_port, vio);
-}
-
-#define VNET_PORT_HASH_SIZE 16
-#define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1)
-
-static inline unsigned int vnet_hashfn(u8 *mac)
-{
- unsigned int val = mac[4] ^ mac[5];
-
- return val & (VNET_PORT_HASH_MASK);
-}
-
-struct vnet_mcast_entry {
- u8 addr[ETH_ALEN];
- u8 sent;
- u8 hit;
- struct vnet_mcast_entry *next;
-};
-
-struct vnet {
- spinlock_t lock; /* Protects port_list and port_hash. */
- struct net_device *dev;
- u32 msg_enable;
- u8 q_used[VNET_MAX_TXQS];
- struct list_head port_list;
- struct hlist_head port_hash[VNET_PORT_HASH_SIZE];
- struct vnet_mcast_entry *mcast_list;
- struct list_head list;
- u64 local_mac;
- int nports;
-};
-
-/* Def used by common code to get the net_device from the proper location */
-#define VNET_PORT_TO_NET_DEVICE(__port) \
- ((__port)->vsw ? (__port)->dev : (__port)->vp->dev)
-
-/* Common funcs */
-void sunvnet_clean_timer_expire_common(struct timer_list *t);
-int sunvnet_open_common(struct net_device *dev);
-int sunvnet_close_common(struct net_device *dev);
-void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);
-int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);
-void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue);
-netdev_tx_t
-sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
- struct vnet_port *(*vnet_tx_port)
- (struct sk_buff *, struct net_device *));
-#ifdef CONFIG_NET_POLL_CONTROLLER
-void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);
-#endif
-void sunvnet_event_common(void *arg, int event);
-int sunvnet_send_attr_common(struct vio_driver_state *vio);
-int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);
-void sunvnet_handshake_complete_common(struct vio_driver_state *vio);
-int sunvnet_poll_common(struct napi_struct *napi, int budget);
-void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);
-void vnet_port_reset(struct vnet_port *port);
-bool sunvnet_port_is_up_common(struct vnet_port *vnet);
-void sunvnet_port_add_txq_common(struct vnet_port *port);
-void sunvnet_port_rm_txq_common(struct vnet_port *port);
-
-#endif /* _SUNVNETCOMMON_H */
--
2.37.2