linux/drivers/net/mlx4/en_netdev.c
Yevgeny Petrilin 0314db69d7 mlx4_en: Remove redundant refill code on RX
Our RX rings are always full, there is no need to check whether
we need to fill them or not. If we fail to allocate a new socket
buffer, the incoming packet is dropped an the ring remains full.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-21 19:18:07 -07:00

1076 lines
29 KiB
C

/*
* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/etherdevice.h>
#include <linux/tcp.h>
#include <linux/if_vlan.h>
#include <linux/delay.h>
#include <linux/mlx4/driver.h>
#include <linux/mlx4/device.h>
#include <linux/mlx4/cmd.h>
#include <linux/mlx4/cq.h>
#include "mlx4_en.h"
#include "en_port.h"
static void mlx4_en_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int err;
en_dbg(HW, priv, "Registering VLAN group:%p\n", grp);
priv->vlgrp = grp;
mutex_lock(&mdev->state_lock);
if (mdev->device_up && priv->port_up) {
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, grp);
if (err)
en_err(priv, "Failed configuring VLAN filter\n");
}
mutex_unlock(&mdev->state_lock);
}
static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int err;
if (!priv->vlgrp)
return;
en_dbg(HW, priv, "adding VLAN:%d (vlgrp entry:%p)\n",
vid, vlan_group_get_device(priv->vlgrp, vid));
/* Add VID to port VLAN filter */
mutex_lock(&mdev->state_lock);
if (mdev->device_up && priv->port_up) {
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
if (err)
en_err(priv, "Failed configuring VLAN filter\n");
}
mutex_unlock(&mdev->state_lock);
}
static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int err;
if (!priv->vlgrp)
return;
en_dbg(HW, priv, "Killing VID:%d (vlgrp:%p vlgrp entry:%p)\n",
vid, priv->vlgrp, vlan_group_get_device(priv->vlgrp, vid));
vlan_group_set_device(priv->vlgrp, vid, NULL);
/* Remove VID from port VLAN filter */
mutex_lock(&mdev->state_lock);
if (mdev->device_up && priv->port_up) {
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
if (err)
en_err(priv, "Failed configuring VLAN filter\n");
}
mutex_unlock(&mdev->state_lock);
}
static u64 mlx4_en_mac_to_u64(u8 *addr)
{
u64 mac = 0;
int i;
for (i = 0; i < ETH_ALEN; i++) {
mac <<= 8;
mac |= addr[i];
}
return mac;
}
static int mlx4_en_set_mac(struct net_device *dev, void *addr)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct sockaddr *saddr = addr;
if (!is_valid_ether_addr(saddr->sa_data))
return -EADDRNOTAVAIL;
memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
queue_work(mdev->workqueue, &priv->mac_task);
return 0;
}
static void mlx4_en_do_set_mac(struct work_struct *work)
{
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
mac_task);
struct mlx4_en_dev *mdev = priv->mdev;
int err = 0;
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
/* Remove old MAC and insert the new one */
mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
err = mlx4_register_mac(mdev->dev, priv->port,
priv->mac, &priv->mac_index);
if (err)
en_err(priv, "Failed changing HW MAC address\n");
} else
en_dbg(HW, priv, "Port is down while "
"registering mac, exiting...\n");
mutex_unlock(&mdev->state_lock);
}
static void mlx4_en_clear_list(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct dev_mc_list *plist = priv->mc_list;
struct dev_mc_list *next;
while (plist) {
next = plist->next;
kfree(plist);
plist = next;
}
priv->mc_list = NULL;
}
static void mlx4_en_cache_mclist(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct dev_mc_list *mclist;
struct dev_mc_list *tmp;
struct dev_mc_list *plist = NULL;
for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
tmp = kmalloc(sizeof(struct dev_mc_list), GFP_ATOMIC);
if (!tmp) {
en_err(priv, "failed to allocate multicast list\n");
mlx4_en_clear_list(dev);
return;
}
memcpy(tmp, mclist, sizeof(struct dev_mc_list));
tmp->next = NULL;
if (plist)
plist->next = tmp;
else
priv->mc_list = tmp;
plist = tmp;
}
}
static void mlx4_en_set_multicast(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
if (!priv->port_up)
return;
queue_work(priv->mdev->workqueue, &priv->mcast_task);
}
static void mlx4_en_do_set_multicast(struct work_struct *work)
{
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
mcast_task);
struct mlx4_en_dev *mdev = priv->mdev;
struct net_device *dev = priv->dev;
struct dev_mc_list *mclist;
u64 mcast_addr = 0;
int err;
mutex_lock(&mdev->state_lock);
if (!mdev->device_up) {
en_dbg(HW, priv, "Card is not up, "
"ignoring multicast change.\n");
goto out;
}
if (!priv->port_up) {
en_dbg(HW, priv, "Port is down, "
"ignoring multicast change.\n");
goto out;
}
/*
* Promsicuous mode: disable all filters
*/
if (dev->flags & IFF_PROMISC) {
if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
if (netif_msg_rx_status(priv))
en_warn(priv, "Entering promiscuous mode\n");
priv->flags |= MLX4_EN_FLAG_PROMISC;
/* Enable promiscouos mode */
err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
priv->base_qpn, 1);
if (err)
en_err(priv, "Failed enabling "
"promiscous mode\n");
/* Disable port multicast filter (unconditionally) */
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_DISABLE);
if (err)
en_err(priv, "Failed disabling "
"multicast filter\n");
/* Disable port VLAN filter */
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
if (err)
en_err(priv, "Failed disabling VLAN filter\n");
}
goto out;
}
/*
* Not in promiscous mode
*/
if (priv->flags & MLX4_EN_FLAG_PROMISC) {
if (netif_msg_rx_status(priv))
en_warn(priv, "Leaving promiscuous mode\n");
priv->flags &= ~MLX4_EN_FLAG_PROMISC;
/* Disable promiscouos mode */
err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
priv->base_qpn, 0);
if (err)
en_err(priv, "Failed disabling promiscous mode\n");
/* Enable port VLAN filter */
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
if (err)
en_err(priv, "Failed enabling VLAN filter\n");
}
/* Enable/disable the multicast filter according to IFF_ALLMULTI */
if (dev->flags & IFF_ALLMULTI) {
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_DISABLE);
if (err)
en_err(priv, "Failed disabling multicast filter\n");
} else {
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_DISABLE);
if (err)
en_err(priv, "Failed disabling multicast filter\n");
/* Flush mcast filter and init it with broadcast address */
mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
1, MLX4_MCAST_CONFIG);
/* Update multicast list - we cache all addresses so they won't
* change while HW is updated holding the command semaphor */
netif_tx_lock_bh(dev);
mlx4_en_cache_mclist(dev);
netif_tx_unlock_bh(dev);
for (mclist = priv->mc_list; mclist; mclist = mclist->next) {
mcast_addr = mlx4_en_mac_to_u64(mclist->dmi_addr);
mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
mcast_addr, 0, MLX4_MCAST_CONFIG);
}
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_ENABLE);
if (err)
en_err(priv, "Failed enabling multicast filter\n");
mlx4_en_clear_list(dev);
}
out:
mutex_unlock(&mdev->state_lock);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void mlx4_en_netpoll(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_cq *cq;
unsigned long flags;
int i;
for (i = 0; i < priv->rx_ring_num; i++) {
cq = &priv->rx_cq[i];
spin_lock_irqsave(&cq->lock, flags);
napi_synchronize(&cq->napi);
mlx4_en_process_rx_cq(dev, cq, 0);
spin_unlock_irqrestore(&cq->lock, flags);
}
}
#endif
static void mlx4_en_tx_timeout(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
if (netif_msg_timer(priv))
en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
priv->port_stats.tx_timeout++;
en_dbg(DRV, priv, "Scheduling watchdog\n");
queue_work(mdev->workqueue, &priv->watchdog_task);
}
static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
spin_lock_bh(&priv->stats_lock);
memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
spin_unlock_bh(&priv->stats_lock);
return &priv->ret_stats;
}
static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
{
struct mlx4_en_cq *cq;
int i;
/* If we haven't received a specific coalescing setting
* (module param), we set the moderation parameters as follows:
* - moder_cnt is set to the number of mtu sized packets to
* satisfy our coelsing target.
* - moder_time is set to a fixed value.
*/
priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
"rx_frames:%d rx_usecs:%d\n",
priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
/* Setup cq moderation params */
for (i = 0; i < priv->rx_ring_num; i++) {
cq = &priv->rx_cq[i];
cq->moder_cnt = priv->rx_frames;
cq->moder_time = priv->rx_usecs;
}
for (i = 0; i < priv->tx_ring_num; i++) {
cq = &priv->tx_cq[i];
cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
cq->moder_time = MLX4_EN_TX_COAL_TIME;
}
/* Reset auto-moderation params */
priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
priv->adaptive_rx_coal = 1;
priv->last_moder_time = MLX4_EN_AUTO_CONF;
priv->last_moder_jiffies = 0;
priv->last_moder_packets = 0;
priv->last_moder_tx_packets = 0;
priv->last_moder_bytes = 0;
}
static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
{
unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
struct mlx4_en_cq *cq;
unsigned long packets;
unsigned long rate;
unsigned long avg_pkt_size;
unsigned long rx_packets;
unsigned long rx_bytes;
unsigned long tx_packets;
unsigned long tx_pkt_diff;
unsigned long rx_pkt_diff;
int moder_time;
int i, err;
if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
return;
spin_lock_bh(&priv->stats_lock);
rx_packets = priv->stats.rx_packets;
rx_bytes = priv->stats.rx_bytes;
tx_packets = priv->stats.tx_packets;
spin_unlock_bh(&priv->stats_lock);
if (!priv->last_moder_jiffies || !period)
goto out;
tx_pkt_diff = ((unsigned long) (tx_packets -
priv->last_moder_tx_packets));
rx_pkt_diff = ((unsigned long) (rx_packets -
priv->last_moder_packets));
packets = max(tx_pkt_diff, rx_pkt_diff);
rate = packets * HZ / period;
avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
priv->last_moder_bytes)) / packets : 0;
/* Apply auto-moderation only when packet rate exceeds a rate that
* it matters */
if (rate > MLX4_EN_RX_RATE_THRESH) {
/* If tx and rx packet rates are not balanced, assume that
* traffic is mainly BW bound and apply maximum moderation.
* Otherwise, moderate according to packet rate */
if (2 * tx_pkt_diff > 3 * rx_pkt_diff ||
2 * rx_pkt_diff > 3 * tx_pkt_diff) {
moder_time = priv->rx_usecs_high;
} else {
if (rate < priv->pkt_rate_low)
moder_time = priv->rx_usecs_low;
else if (rate > priv->pkt_rate_high)
moder_time = priv->rx_usecs_high;
else
moder_time = (rate - priv->pkt_rate_low) *
(priv->rx_usecs_high - priv->rx_usecs_low) /
(priv->pkt_rate_high - priv->pkt_rate_low) +
priv->rx_usecs_low;
}
} else {
/* When packet rate is low, use default moderation rather than
* 0 to prevent interrupt storms if traffic suddenly increases */
moder_time = priv->rx_usecs;
}
en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
"[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
priv->last_moder_time, moder_time, period, packets,
avg_pkt_size, rate);
if (moder_time != priv->last_moder_time) {
priv->last_moder_time = moder_time;
for (i = 0; i < priv->rx_ring_num; i++) {
cq = &priv->rx_cq[i];
cq->moder_time = moder_time;
err = mlx4_en_set_cq_moder(priv, cq);
if (err) {
en_err(priv, "Failed modifying moderation for cq:%d\n", i);
break;
}
}
}
out:
priv->last_moder_packets = rx_packets;
priv->last_moder_tx_packets = tx_packets;
priv->last_moder_bytes = rx_bytes;
priv->last_moder_jiffies = jiffies;
}
static void mlx4_en_do_get_stats(struct work_struct *work)
{
struct delayed_work *delay = to_delayed_work(work);
struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
stats_task);
struct mlx4_en_dev *mdev = priv->mdev;
int err;
err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
if (err)
en_dbg(HW, priv, "Could not update stats \n");
mutex_lock(&mdev->state_lock);
if (mdev->device_up) {
if (priv->port_up)
mlx4_en_auto_moderation(priv);
queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
}
mutex_unlock(&mdev->state_lock);
}
static void mlx4_en_linkstate(struct work_struct *work)
{
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
linkstate_task);
struct mlx4_en_dev *mdev = priv->mdev;
int linkstate = priv->link_state;
mutex_lock(&mdev->state_lock);
/* If observable port state changed set carrier state and
* report to system log */
if (priv->last_link_state != linkstate) {
if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
en_dbg(LINK, priv, "Link Down\n");
netif_carrier_off(priv->dev);
} else {
en_dbg(LINK, priv, "Link Up\n");
netif_carrier_on(priv->dev);
}
}
priv->last_link_state = linkstate;
mutex_unlock(&mdev->state_lock);
}
int mlx4_en_start_port(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_en_cq *cq;
struct mlx4_en_tx_ring *tx_ring;
int rx_index = 0;
int tx_index = 0;
int err = 0;
int i;
int j;
if (priv->port_up) {
en_dbg(DRV, priv, "start port called while port already up\n");
return 0;
}
/* Calculate Rx buf size */
dev->mtu = min(dev->mtu, priv->max_mtu);
mlx4_en_calc_rx_buf(dev);
en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
/* Configure rx cq's and rings */
err = mlx4_en_activate_rx_rings(priv);
if (err) {
en_err(priv, "Failed to activate RX rings\n");
return err;
}
for (i = 0; i < priv->rx_ring_num; i++) {
cq = &priv->rx_cq[i];
err = mlx4_en_activate_cq(priv, cq);
if (err) {
en_err(priv, "Failed activating Rx CQ\n");
goto cq_err;
}
for (j = 0; j < cq->size; j++)
cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
err = mlx4_en_set_cq_moder(priv, cq);
if (err) {
en_err(priv, "Failed setting cq moderation parameters");
mlx4_en_deactivate_cq(priv, cq);
goto cq_err;
}
mlx4_en_arm_cq(priv, cq);
priv->rx_ring[i].cqn = cq->mcq.cqn;
++rx_index;
}
err = mlx4_en_config_rss_steer(priv);
if (err) {
en_err(priv, "Failed configuring rss steering\n");
goto cq_err;
}
/* Configure tx cq's and rings */
for (i = 0; i < priv->tx_ring_num; i++) {
/* Configure cq */
cq = &priv->tx_cq[i];
err = mlx4_en_activate_cq(priv, cq);
if (err) {
en_err(priv, "Failed allocating Tx CQ\n");
goto tx_err;
}
err = mlx4_en_set_cq_moder(priv, cq);
if (err) {
en_err(priv, "Failed setting cq moderation parameters");
mlx4_en_deactivate_cq(priv, cq);
goto tx_err;
}
en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
cq->buf->wqe_index = cpu_to_be16(0xffff);
/* Configure ring */
tx_ring = &priv->tx_ring[i];
err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
priv->rx_ring[0].srq.srqn);
if (err) {
en_err(priv, "Failed allocating Tx ring\n");
mlx4_en_deactivate_cq(priv, cq);
goto tx_err;
}
/* Set initial ownership of all Tx TXBBs to SW (1) */
for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
*((u32 *) (tx_ring->buf + j)) = 0xffffffff;
++tx_index;
}
/* Configure port */
err = mlx4_SET_PORT_general(mdev->dev, priv->port,
priv->rx_skb_size + ETH_FCS_LEN,
priv->prof->tx_pause,
priv->prof->tx_ppp,
priv->prof->rx_pause,
priv->prof->rx_ppp);
if (err) {
en_err(priv, "Failed setting port general configurations "
"for port %d, with error %d\n", priv->port, err);
goto tx_err;
}
/* Set default qp number */
err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
if (err) {
en_err(priv, "Failed setting default qp numbers\n");
goto tx_err;
}
/* Set port mac number */
en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
err = mlx4_register_mac(mdev->dev, priv->port,
priv->mac, &priv->mac_index);
if (err) {
en_err(priv, "Failed setting port mac\n");
goto tx_err;
}
/* Init port */
en_dbg(HW, priv, "Initializing port\n");
err = mlx4_INIT_PORT(mdev->dev, priv->port);
if (err) {
en_err(priv, "Failed Initializing port\n");
goto mac_err;
}
/* Schedule multicast task to populate multicast list */
queue_work(mdev->workqueue, &priv->mcast_task);
priv->port_up = true;
netif_tx_start_all_queues(dev);
return 0;
mac_err:
mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
tx_err:
while (tx_index--) {
mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
}
mlx4_en_release_rss_steer(priv);
cq_err:
while (rx_index--)
mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
for (i = 0; i < priv->rx_ring_num; i++)
mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
return err; /* need to close devices */
}
void mlx4_en_stop_port(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int i;
if (!priv->port_up) {
en_dbg(DRV, priv, "stop port called while port already down\n");
return;
}
/* Synchronize with tx routine */
netif_tx_lock_bh(dev);
netif_tx_stop_all_queues(dev);
netif_tx_unlock_bh(dev);
/* close port*/
priv->port_up = false;
mlx4_CLOSE_PORT(mdev->dev, priv->port);
/* Unregister Mac address for the port */
mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
/* Free TX Rings */
for (i = 0; i < priv->tx_ring_num; i++) {
mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
}
msleep(10);
for (i = 0; i < priv->tx_ring_num; i++)
mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
/* Free RSS qps */
mlx4_en_release_rss_steer(priv);
/* Free RX Rings */
for (i = 0; i < priv->rx_ring_num; i++) {
mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
msleep(1);
mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
}
}
static void mlx4_en_restart(struct work_struct *work)
{
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
watchdog_task);
struct mlx4_en_dev *mdev = priv->mdev;
struct net_device *dev = priv->dev;
en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
mlx4_en_stop_port(dev);
if (mlx4_en_start_port(dev))
en_err(priv, "Failed restarting port %d\n", priv->port);
}
mutex_unlock(&mdev->state_lock);
}
static int mlx4_en_open(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int i;
int err = 0;
mutex_lock(&mdev->state_lock);
if (!mdev->device_up) {
en_err(priv, "Cannot open - device down/disabled\n");
err = -EBUSY;
goto out;
}
/* Reset HW statistics and performance counters */
if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
en_dbg(HW, priv, "Failed dumping statistics\n");
memset(&priv->stats, 0, sizeof(priv->stats));
memset(&priv->pstats, 0, sizeof(priv->pstats));
for (i = 0; i < priv->tx_ring_num; i++) {
priv->tx_ring[i].bytes = 0;
priv->tx_ring[i].packets = 0;
}
for (i = 0; i < priv->rx_ring_num; i++) {
priv->rx_ring[i].bytes = 0;
priv->rx_ring[i].packets = 0;
}
mlx4_en_set_default_moderation(priv);
err = mlx4_en_start_port(dev);
if (err)
en_err(priv, "Failed starting port:%d\n", priv->port);
out:
mutex_unlock(&mdev->state_lock);
return err;
}
static int mlx4_en_close(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
en_dbg(IFDOWN, priv, "Close port called\n");
mutex_lock(&mdev->state_lock);
mlx4_en_stop_port(dev);
netif_carrier_off(dev);
mutex_unlock(&mdev->state_lock);
return 0;
}
void mlx4_en_free_resources(struct mlx4_en_priv *priv)
{
int i;
for (i = 0; i < priv->tx_ring_num; i++) {
if (priv->tx_ring[i].tx_info)
mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
if (priv->tx_cq[i].buf)
mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
}
for (i = 0; i < priv->rx_ring_num; i++) {
if (priv->rx_ring[i].rx_info)
mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
if (priv->rx_cq[i].buf)
mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
}
}
int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
{
struct mlx4_en_port_profile *prof = priv->prof;
int i;
/* Create tx Rings */
for (i = 0; i < priv->tx_ring_num; i++) {
if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
prof->tx_ring_size, i, TX))
goto err;
if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
prof->tx_ring_size, TXBB_SIZE))
goto err;
}
/* Create rx Rings */
for (i = 0; i < priv->rx_ring_num; i++) {
if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
prof->rx_ring_size, i, RX))
goto err;
if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
prof->rx_ring_size, priv->stride))
goto err;
}
return 0;
err:
en_err(priv, "Failed to allocate NIC resources\n");
return -ENOMEM;
}
void mlx4_en_destroy_netdev(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
/* Unregister device - this will close the port if it was up */
if (priv->registered)
unregister_netdev(dev);
if (priv->allocated)
mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
cancel_delayed_work(&priv->stats_task);
/* flush any pending task for this netdev */
flush_workqueue(mdev->workqueue);
/* Detach the netdev so tasks would not attempt to access it */
mutex_lock(&mdev->state_lock);
mdev->pndev[priv->port] = NULL;
mutex_unlock(&mdev->state_lock);
mlx4_en_free_resources(priv);
free_netdev(dev);
}
static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int err = 0;
en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
dev->mtu, new_mtu);
if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
en_err(priv, "Bad MTU size:%d.\n", new_mtu);
return -EPERM;
}
dev->mtu = new_mtu;
if (netif_running(dev)) {
mutex_lock(&mdev->state_lock);
if (!mdev->device_up) {
/* NIC is probably restarting - let watchdog task reset
* the port */
en_dbg(DRV, priv, "Change MTU called with card down!?\n");
} else {
mlx4_en_stop_port(dev);
mlx4_en_set_default_moderation(priv);
err = mlx4_en_start_port(dev);
if (err) {
en_err(priv, "Failed restarting port:%d\n",
priv->port);
queue_work(mdev->workqueue, &priv->watchdog_task);
}
}
mutex_unlock(&mdev->state_lock);
}
return 0;
}
static const struct net_device_ops mlx4_netdev_ops = {
.ndo_open = mlx4_en_open,
.ndo_stop = mlx4_en_close,
.ndo_start_xmit = mlx4_en_xmit,
.ndo_select_queue = mlx4_en_select_queue,
.ndo_get_stats = mlx4_en_get_stats,
.ndo_set_multicast_list = mlx4_en_set_multicast,
.ndo_set_mac_address = mlx4_en_set_mac,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = mlx4_en_change_mtu,
.ndo_tx_timeout = mlx4_en_tx_timeout,
.ndo_vlan_rx_register = mlx4_en_vlan_rx_register,
.ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = mlx4_en_netpoll,
#endif
};
int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
struct mlx4_en_port_profile *prof)
{
struct net_device *dev;
struct mlx4_en_priv *priv;
int i;
int err;
dev = alloc_etherdev_mq(sizeof(struct mlx4_en_priv), prof->tx_ring_num);
if (dev == NULL) {
mlx4_err(mdev, "Net device allocation failed\n");
return -ENOMEM;
}
SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
/*
* Initialize driver private data
*/
priv = netdev_priv(dev);
memset(priv, 0, sizeof(struct mlx4_en_priv));
priv->dev = dev;
priv->mdev = mdev;
priv->prof = prof;
priv->port = port;
priv->port_up = false;
priv->rx_csum = 1;
priv->flags = prof->flags;
priv->tx_ring_num = prof->tx_ring_num;
priv->rx_ring_num = prof->rx_ring_num;
priv->mc_list = NULL;
priv->mac_index = -1;
priv->msg_enable = MLX4_EN_MSG_LEVEL;
spin_lock_init(&priv->stats_lock);
INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
/* Query for default mac and max mtu */
priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
priv->mac = mdev->dev->caps.def_mac[priv->port];
if (ILLEGAL_MAC(priv->mac)) {
en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
priv->port, priv->mac);
err = -EINVAL;
goto out;
}
priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
err = mlx4_en_alloc_resources(priv);
if (err)
goto out;
/* Populate Rx default RSS mappings */
mlx4_en_set_default_rss_map(priv, &priv->rss_map, priv->rx_ring_num *
RSS_FACTOR, priv->rx_ring_num);
/* Allocate page for receive rings */
err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
if (err) {
en_err(priv, "Failed to allocate page for rx qps\n");
goto out;
}
priv->allocated = 1;
/*
* Initialize netdev entry points
*/
dev->netdev_ops = &mlx4_netdev_ops;
dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
dev->real_num_tx_queues = MLX4_EN_NUM_TX_RINGS;
SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
/* Set defualt MAC */
dev->addr_len = ETH_ALEN;
for (i = 0; i < ETH_ALEN; i++)
dev->dev_addr[ETH_ALEN - 1 - i] =
(u8) (priv->mac >> (8 * i));
/*
* Set driver features
*/
dev->features |= NETIF_F_SG;
dev->vlan_features |= NETIF_F_SG;
dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
dev->vlan_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
dev->features |= NETIF_F_HIGHDMA;
dev->features |= NETIF_F_HW_VLAN_TX |
NETIF_F_HW_VLAN_RX |
NETIF_F_HW_VLAN_FILTER;
if (mdev->profile.num_lro)
dev->features |= NETIF_F_LRO;
if (mdev->LSO_support) {
dev->features |= NETIF_F_TSO;
dev->features |= NETIF_F_TSO6;
dev->vlan_features |= NETIF_F_TSO;
dev->vlan_features |= NETIF_F_TSO6;
}
mdev->pndev[port] = dev;
netif_carrier_off(dev);
err = register_netdev(dev);
if (err) {
en_err(priv, "Netdev registration failed for port %d\n", port);
goto out;
}
en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
priv->registered = 1;
queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
return 0;
out:
mlx4_en_destroy_netdev(dev);
return err;
}