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Date: Wed, 20 Aug 2008 16:00:18 +0300
From: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To: jgarzik@...ox.com
CC: netdev@...r.kernel.org, Liran Liss <liranl@...lanox.co.il>,
tziporet@...lanox.co.il, Roland Dreier <rdreier@...co.com>
Subject: [Patch RFC 03/10 v2] mlx4_en : en_netdev
From: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
Date: Mon, 18 Aug 2008 11:32:55 +0300
Subject: [PATCH] mlx4_en : en_netdev
This file implements the network device interface.
Such device is created for every ethernet port of the device.
Signed-off-by: Liran Liss <liranl@...lanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
---
drivers/net/mlx4/en_netdev.c | 1097 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 1097 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/mlx4/en_netdev.c
diff --git a/drivers/net/mlx4/en_netdev.c b/drivers/net/mlx4/en_netdev.c
new file mode 100644
index 0000000..bca58da
--- /dev/null
+++ b/drivers/net/mlx4/en_netdev.c
@@ -0,0 +1,1097 @@
+/*
+ * 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(mdev, "Regsitering 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(mdev, "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(mdev, "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)) {
+ mlx4_dbg(mdev, "Invalid mac address!\n");
+ 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(mdev, "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;
+
+ mlx4_dbg(mdev, "multicast task called for port:%d\n", priv->port);
+
+ mutex_lock(&mdev->state_lock);
+ if (!mdev->device_up) {
+ mlx4_dbg(mdev, "Card is not up, ignoring multicast change.\n");
+ goto out;
+ }
+ if (!priv->port_up) {
+ mlx4_dbg(mdev, "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)) {
+ 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) {
+ 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);
+}
+
+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);
+ }
+}
+
+
+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;
+
+ mlx4_warn(mdev, "Tx timeout called on port:%d\n", priv->port);
+
+ if (netif_carrier_ok(dev)) {
+ priv->port_stats.rst_cnt++;
+ mlx4_dbg(mdev, "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;
+}
+
+void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
+{
+ struct mlx4_en_dev *mdev = priv->mdev;
+ 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 = (mdev->profile.rx_moder_cnt ==
+ MLX4_EN_AUTO_CONF) ?
+ MLX4_EN_RX_COAL_TARGET /
+ priv->dev->mtu + 1 :
+ mdev->profile.rx_moder_cnt;
+ priv->rx_usecs = (mdev->profile.rx_moder_time ==
+ MLX4_EN_AUTO_CONF) ?
+ MLX4_EN_RX_COAL_TIME :
+ mdev->profile.rx_moder_time;
+ mlx4_dbg(mdev, "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;
+ }
+
+ /* 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 = mdev->profile.auto_moder;
+ 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;
+
+ if (DO_SW_COUNTERS) {
+ struct mlx4_en_rx_ring *rx_ring;
+ struct mlx4_en_tx_ring *tx_ring;
+
+ rx_packets = 0;
+ rx_bytes = 0;
+ tx_packets = 0;
+ for (i = 0; i < priv->rx_ring_num; i++) {
+ rx_ring = &priv->rx_ring[i];
+ rx_bytes += rx_ring->bytes;
+ rx_packets += rx_ring->packets;
+ }
+ for (i = 0; i < priv->tx_ring_num; i++) {
+ tx_ring = &priv->tx_ring[i];
+ tx_packets += tx_ring->packets;
+ }
+ } else {
+ 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(mdev, "tx rate:%lu rx_rate:%lu\n",
+ tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
+
+ mlx4_dbg(mdev, "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;
+ int i;
+
+ mlx4_dbg(mdev, "Updating statistics for port:%d\n", priv->port);
+
+ err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
+ if (err)
+ mlx4_dbg(mdev, "Could not update stats for "
+ "port:%d\n", priv->port);
+
+ if (DO_SW_COUNTERS) {
+ spin_lock_bh(&priv->stats_lock);
+ priv->stats.tx_bytes = 0;
+ priv->stats.tx_packets = 0;
+ for (i = 0; i < priv->tx_ring_num; i++) {
+ priv->stats.tx_bytes += priv->tx_ring[i].bytes;
+ priv->stats.tx_packets += priv->tx_ring[i].packets;
+ }
+ priv->stats.rx_bytes = 0;
+ priv->stats.rx_packets = 0;
+ for (i = 0; i < priv->rx_ring_num; i++) {
+ priv->stats.rx_bytes += priv->rx_ring[i].bytes;
+ priv->stats.rx_packets += priv->rx_ring[i].packets;
+ }
+ spin_unlock_bh(&priv->stats_lock);
+ }
+
+ 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) {
+ mlx4_info(mdev, "Port %d - link down\n", priv->port);
+ netif_carrier_off(priv->dev);
+ } else {
+ 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;
+
+ mlx4_dbg(mdev, "starting port:%d\n", priv->port);
+ if (priv->port_up) {
+ mlx4_dbg(mdev, "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(mdev, "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;
+ }
+ mlx4_dbg(mdev, "Resetting index of collapsed CQ:%d "
+ "to -1\n", i);
+ cq->buf->wqe_index = 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,
+ mdev->profile.tx_pause,
+ mdev->profile.tx_ppp,
+ mdev->profile.rx_pause,
+ mdev->profile.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(mdev, "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(mdev, "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[rx_index]);
+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;
+
+ mlx4_dbg(mdev, "Stop_port called for port:%d\n", priv->port);
+
+ if (!priv->port_up) {
+ mlx4_dbg(mdev, "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(mdev, "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);
+}
+
+
+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;
+
+ mlx4_dbg(mdev, "Open called for port:%d\n", priv->port);
+
+ 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(mdev, "Failed dumping statistics\n");
+
+ memset(&priv->stats, 0, sizeof(priv->stats));
+ memset(&priv->pstats, 0, sizeof(priv->pstats));
+ if (DO_SW_COUNTERS) {
+ 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;
+}
+
+
+int mlx4_en_close(struct net_device *dev)
+{
+ struct mlx4_en_priv *priv = netdev_priv(dev);
+ struct mlx4_en_dev *mdev = priv->mdev;
+
+ 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_destroy_netdev(struct net_device *dev)
+{
+ struct mlx4_en_priv *priv = netdev_priv(dev);
+ struct mlx4_en_dev *mdev = priv->mdev;
+ int i;
+
+ mlx4_dbg(mdev, "Destroying netdev on port:%d\n", priv->port);
+
+ /* Unregsiter 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);
+
+ 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]);
+ }
+
+ 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(mdev, "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(mdev, "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;
+}
+
+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;
+ int stride;
+
+ 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;
+ 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];
+ mlx4_dbg(mdev, " Max mtu is: %d, Mac is: 0x%llx\n", priv->max_mtu, priv->mac);
+
+ /* Create tx Rings */
+ for (i = 0; i < prof->tx_ring_num; i++) {
+ err = mlx4_en_create_cq(priv, &priv->tx_cq[i],
+ priv->prof->tx_ring_size, i, TX);
+ if (err) {
+ mlx4_err(mdev, "Failed to allocate tx CQ\n");
+ goto out;
+ }
+ err = mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
+ prof->tx_ring_size, TXBB_SIZE);
+ if (err) {
+ mlx4_err(mdev, "Failed to create tx ring\n");
+ goto out;
+ }
+ }
+
+ /* Create rx Rings */
+ stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
+ DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
+ for (i = 0; i < prof->rx_ring_num; i++) {
+ err = mlx4_en_create_cq(priv, &priv->rx_cq[i],
+ priv->prof->rx_ring_size, i, RX);
+ if (err) {
+ mlx4_err(mdev, "Failed to allocate rx CQ\n");
+ goto out;
+ }
+ err = mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
+ prof->rx_ring_size, stride);
+ if (err) {
+ mlx4_err(mdev, "Failed to create tx ring\n");
+ goto out;
+ }
+ }
+
+ /* Populate Rx default RSS mappings */
+ mlx4_en_set_default_rss_map(mdev, &priv->rss_map, prof->rx_ring_num *
+ RSS_FACTOR, prof->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(mdev, priv->tx_prio_map, prof->tx_ring_num);
+
+ /*
+ * Initialize netdev entry points
+ */
+
+ dev->open = &mlx4_en_open;
+ dev->stop = &mlx4_en_close;
+ dev->hard_start_xmit = &mlx4_en_xmit;
+ dev->get_stats = &mlx4_en_get_stats;
+ dev->set_multicast_list = &mlx4_en_set_multicast;
+ dev->set_mac_address = &mlx4_en_set_mac;
+ dev->change_mtu = &mlx4_en_change_mtu;
+ dev->tx_timeout = &mlx4_en_tx_timeout;
+ dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
+ dev->vlan_rx_register = mlx4_en_vlan_rx_register;
+ dev->vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid;
+ dev->vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = mlx4_en_netpoll;
+#endif
+ 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;
+}
+
--
1.5.4
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