| /* |
| * 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); |
| |
| 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 = 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) |
| 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 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) { |
| 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); |
| |
| mutex_lock(&mdev->state_lock); |
| if (priv->port_up) { |
| mlx4_en_stop_port(dev); |
| if (mlx4_en_start_port(dev)) |
| mlx4_err(mdev, "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) { |
| 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_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; |
| } |
| |
| 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; |
| } |
| |