/*
* 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;
mlx4_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)
mlx4_err(mdev, "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;
mlx4_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)
mlx4_err(mdev, "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;
mlx4_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)
mlx4_err(mdev, "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)
mlx4_err(mdev, "Failed changing HW MAC address\n");
} else
mlx4_dbg(HW, priv, "Port is down, 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 mlx4_en_dev *mdev = priv->mdev;
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) {
mlx4_err(mdev, "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) {
mlx4_dbg(HW, priv, "Card is not up, ignoring "
"multicast change.\n");
goto out;
}
if (!priv->port_up) {
mlx4_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))
mlx4_warn(mdev, "Port:%d entering promiscuous mode\n",
priv->port);
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)
mlx4_err(mdev, "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)
mlx4_err(mdev, "Failed disabling "
"multicast filter\n");
/* Disable port VLAN filter */
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
if (err)
mlx4_err(mdev, "Failed disabling "
"VLAN filter\n");
}
goto out;
}
/*
* Not in promiscous mode
*/
if (priv->flags & MLX4_EN_FLAG_PROMISC) {
if (netif_msg_rx_status(priv))
mlx4_warn(mdev, "Port:%d leaving promiscuous mode\n",
priv->port);
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)
mlx4_err(mdev, "Failed disabling promiscous mode\n");
/* Enable port VLAN filter */
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
if (err)
mlx4_err(mdev, "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)
mlx4_err(mdev, "Failed disabling multicast filter\n");
} else {
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_DISABLE);
if (err)
mlx4_err(mdev, "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)
mlx4_err(mdev, "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))
mlx4_warn(mdev, "Tx timeout called on port:%d\n", priv->port);
if (netif_carrier_ok(dev)) {
priv->port_stats.tx_timeout++;
mlx4_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 paramters 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->dev->mtu + 1;
priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
mlx4_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_dev *mdev = priv->mdev;
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;
}
mlx4_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
mlx4_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) {
mlx4_err(mdev, "Failed modifying moderation for cq:%d "
"on port:%d\n", i, priv->port);
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 = container_of(work, struct 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)
mlx4_dbg(HW, priv, "Could not update stats for "
"port:%d\n", priv->port);
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) {
if (netif_msg_link(priv))
mlx4_info(mdev, "Port %d - link down\n", priv->port);
netif_carrier_off(priv->dev);
} else {
if (netif_msg_link(priv))
mlx4_info(mdev, "Port %d - link up\n", priv->port);
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;
struct mlx4_en_rx_ring *rx_ring;
int rx_index = 0;
int tx_index = 0;
u16 stride;
int err = 0;
int i;
int j;
if (priv->port_up) {
mlx4_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);
mlx4_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
DS_SIZE * priv->num_frags);
/* Configure rx cq's and rings */
for (i = 0; i < priv->rx_ring_num; i++) {
cq = &priv->rx_cq[i];
rx_ring = &priv->rx_ring[i];
err = mlx4_en_activate_cq(priv, cq);
if (err) {
mlx4_err(mdev, "Failed activating Rx CQ\n");
goto rx_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) {
mlx4_err(mdev, "Failed setting cq moderation parameters");
mlx4_en_deactivate_cq(priv, cq);
goto cq_err;
}
mlx4_en_arm_cq(priv, cq);
++rx_index;
}
err = mlx4_en_activate_rx_rings(priv);
if (err) {
mlx4_err(mdev, "Failed to activate RX rings\n");
goto cq_err;
}
err = mlx4_en_config_rss_steer(priv);
if (err) {
mlx4_err(mdev, "Failed configuring rss steering\n");
goto rx_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) {
mlx4_err(mdev, "Failed allocating Tx CQ\n");
goto tx_err;
}
err = mlx4_en_set_cq_moder(priv, cq);
if (err) {
mlx4_err(mdev, "Failed setting cq moderation parameters");
mlx4_en_deactivate_cq(priv, cq);
goto tx_err;
}
mlx4_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) {
mlx4_err(mdev, "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) {
mlx4_err(mdev, "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) {
mlx4_err(mdev, "Failed setting default qp numbers\n");
goto tx_err;
}
/* Set port mac number */
mlx4_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) {
mlx4_err(mdev, "Failed setting port mac\n");
goto tx_err;
}
/* Init port */
mlx4_dbg(HW, priv, "Initializing port\n");
err = mlx4_INIT_PORT(mdev->dev, priv->port);
if (err) {
mlx4_err(mdev, "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_start_queue(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);
rx_err:
for (i = 0; i < priv->rx_ring_num; i++)
mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
cq_err:
while (rx_index--)
mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
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) {
mlx4_dbg(DRV, priv, "stop port (%d) called while port already down\n",
priv->port);
return;
}
netif_stop_queue(dev);
/* Synchronize with tx routine */
netif_tx_lock_bh(dev);
priv->port_up = false;
netif_tx_unlock_bh(dev);
/* close port*/
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;
mlx4_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
mlx4_en_stop_port(dev);
if (mlx4_en_start_port(dev))
mlx4_err(mdev, "Failed restarting port %d\n", priv->port);
}
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) {
mlx4_err(mdev, "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))
mlx4_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)
mlx4_err(mdev, "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;
if (netif_msg_ifdown(priv))
mlx4_info(mdev, "Close called for port:%d\n", priv->port);
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_dev *mdev = priv->mdev;
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:
mlx4_err(mdev, "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;
mlx4_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);
cancel_delayed_work(&priv->refill_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;
mlx4_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)) {
mlx4_err(mdev, "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 */
mlx4_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) {
mlx4_err(mdev, "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_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(sizeof(struct mlx4_en_priv));
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_DELAYED_WORK(&priv->refill_task, mlx4_en_rx_refill);
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)) {
mlx4_err(mdev, "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) {
mlx4_err(mdev, "Failed to allocate page for rx qps\n");
goto out;
}
priv->allocated = 1;
/* Populate Tx priority mappings */
mlx4_en_set_prio_map(priv, priv->tx_prio_map, prof->tx_ring_num);
/*
* Initialize netdev entry points
*/
dev->netdev_ops = &mlx4_netdev_ops;
dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
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->features |= NETIF_F_HW_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;
}
mdev->pndev[port] = dev;
netif_carrier_off(dev);
err = register_netdev(dev);
if (err) {
mlx4_err(mdev, "Netdev registration failed\n");
goto out;
}
priv->registered = 1;
queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
return 0;
out:
mlx4_en_destroy_netdev(dev);
return err;
}
