2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/etherdevice.h>
35 #include <linux/tcp.h>
36 #include <linux/if_vlan.h>
37 #include <linux/delay.h>
39 #include <linux/mlx4/driver.h>
40 #include <linux/mlx4/device.h>
41 #include <linux/mlx4/cmd.h>
42 #include <linux/mlx4/cq.h>
48 static void mlx4_en_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
50 struct mlx4_en_priv *priv = netdev_priv(dev);
51 struct mlx4_en_dev *mdev = priv->mdev;
54 en_dbg(HW, priv, "Registering VLAN group:%p\n", grp);
57 mutex_lock(&mdev->state_lock);
58 if (mdev->device_up && priv->port_up) {
59 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, grp);
61 en_err(priv, "Failed configuring VLAN filter\n");
63 mutex_unlock(&mdev->state_lock);
66 static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
68 struct mlx4_en_priv *priv = netdev_priv(dev);
69 struct mlx4_en_dev *mdev = priv->mdev;
75 en_dbg(HW, priv, "adding VLAN:%d (vlgrp entry:%p)\n",
76 vid, vlan_group_get_device(priv->vlgrp, vid));
78 /* Add VID to port VLAN filter */
79 mutex_lock(&mdev->state_lock);
80 if (mdev->device_up && priv->port_up) {
81 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
83 en_err(priv, "Failed configuring VLAN filter\n");
85 mutex_unlock(&mdev->state_lock);
88 static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
90 struct mlx4_en_priv *priv = netdev_priv(dev);
91 struct mlx4_en_dev *mdev = priv->mdev;
97 en_dbg(HW, priv, "Killing VID:%d (vlgrp:%p vlgrp entry:%p)\n",
98 vid, priv->vlgrp, vlan_group_get_device(priv->vlgrp, vid));
99 vlan_group_set_device(priv->vlgrp, vid, NULL);
101 /* Remove VID from port VLAN filter */
102 mutex_lock(&mdev->state_lock);
103 if (mdev->device_up && priv->port_up) {
104 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
106 en_err(priv, "Failed configuring VLAN filter\n");
108 mutex_unlock(&mdev->state_lock);
111 static u64 mlx4_en_mac_to_u64(u8 *addr)
116 for (i = 0; i < ETH_ALEN; i++) {
123 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
125 struct mlx4_en_priv *priv = netdev_priv(dev);
126 struct mlx4_en_dev *mdev = priv->mdev;
127 struct sockaddr *saddr = addr;
129 if (!is_valid_ether_addr(saddr->sa_data))
130 return -EADDRNOTAVAIL;
132 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
133 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
134 queue_work(mdev->workqueue, &priv->mac_task);
138 static void mlx4_en_do_set_mac(struct work_struct *work)
140 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
142 struct mlx4_en_dev *mdev = priv->mdev;
145 mutex_lock(&mdev->state_lock);
147 /* Remove old MAC and insert the new one */
148 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
149 err = mlx4_register_mac(mdev->dev, priv->port,
150 priv->mac, &priv->mac_index);
152 en_err(priv, "Failed changing HW MAC address\n");
154 en_dbg(HW, priv, "Port is down while "
155 "registering mac, exiting...\n");
157 mutex_unlock(&mdev->state_lock);
160 static void mlx4_en_clear_list(struct net_device *dev)
162 struct mlx4_en_priv *priv = netdev_priv(dev);
163 struct dev_mc_list *plist = priv->mc_list;
164 struct dev_mc_list *next;
171 priv->mc_list = NULL;
174 static void mlx4_en_cache_mclist(struct net_device *dev)
176 struct mlx4_en_priv *priv = netdev_priv(dev);
177 struct dev_mc_list *mclist;
178 struct dev_mc_list *tmp;
179 struct dev_mc_list *plist = NULL;
181 for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
182 tmp = kmalloc(sizeof(struct dev_mc_list), GFP_ATOMIC);
184 en_err(priv, "failed to allocate multicast list\n");
185 mlx4_en_clear_list(dev);
188 memcpy(tmp, mclist, sizeof(struct dev_mc_list));
199 static void mlx4_en_set_multicast(struct net_device *dev)
201 struct mlx4_en_priv *priv = netdev_priv(dev);
206 queue_work(priv->mdev->workqueue, &priv->mcast_task);
209 static void mlx4_en_do_set_multicast(struct work_struct *work)
211 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
213 struct mlx4_en_dev *mdev = priv->mdev;
214 struct net_device *dev = priv->dev;
215 struct dev_mc_list *mclist;
219 mutex_lock(&mdev->state_lock);
220 if (!mdev->device_up) {
221 en_dbg(HW, priv, "Card is not up, "
222 "ignoring multicast change.\n");
225 if (!priv->port_up) {
226 en_dbg(HW, priv, "Port is down, "
227 "ignoring multicast change.\n");
232 * Promsicuous mode: disable all filters
235 if (dev->flags & IFF_PROMISC) {
236 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
237 if (netif_msg_rx_status(priv))
238 en_warn(priv, "Entering promiscuous mode\n");
239 priv->flags |= MLX4_EN_FLAG_PROMISC;
241 /* Enable promiscouos mode */
242 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
245 en_err(priv, "Failed enabling "
246 "promiscous mode\n");
248 /* Disable port multicast filter (unconditionally) */
249 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
250 0, MLX4_MCAST_DISABLE);
252 en_err(priv, "Failed disabling "
253 "multicast filter\n");
255 /* Disable port VLAN filter */
256 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
258 en_err(priv, "Failed disabling VLAN filter\n");
264 * Not in promiscous mode
267 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
268 if (netif_msg_rx_status(priv))
269 en_warn(priv, "Leaving promiscuous mode\n");
270 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
272 /* Disable promiscouos mode */
273 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
276 en_err(priv, "Failed disabling promiscous mode\n");
278 /* Enable port VLAN filter */
279 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
281 en_err(priv, "Failed enabling VLAN filter\n");
284 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
285 if (dev->flags & IFF_ALLMULTI) {
286 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
287 0, MLX4_MCAST_DISABLE);
289 en_err(priv, "Failed disabling multicast filter\n");
291 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
292 0, MLX4_MCAST_DISABLE);
294 en_err(priv, "Failed disabling multicast filter\n");
296 /* Flush mcast filter and init it with broadcast address */
297 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
298 1, MLX4_MCAST_CONFIG);
300 /* Update multicast list - we cache all addresses so they won't
301 * change while HW is updated holding the command semaphor */
302 netif_tx_lock_bh(dev);
303 mlx4_en_cache_mclist(dev);
304 netif_tx_unlock_bh(dev);
305 for (mclist = priv->mc_list; mclist; mclist = mclist->next) {
306 mcast_addr = mlx4_en_mac_to_u64(mclist->dmi_addr);
307 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
308 mcast_addr, 0, MLX4_MCAST_CONFIG);
310 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
311 0, MLX4_MCAST_ENABLE);
313 en_err(priv, "Failed enabling multicast filter\n");
315 mlx4_en_clear_list(dev);
318 mutex_unlock(&mdev->state_lock);
321 #ifdef CONFIG_NET_POLL_CONTROLLER
322 static void mlx4_en_netpoll(struct net_device *dev)
324 struct mlx4_en_priv *priv = netdev_priv(dev);
325 struct mlx4_en_cq *cq;
329 for (i = 0; i < priv->rx_ring_num; i++) {
330 cq = &priv->rx_cq[i];
331 spin_lock_irqsave(&cq->lock, flags);
332 napi_synchronize(&cq->napi);
333 mlx4_en_process_rx_cq(dev, cq, 0);
334 spin_unlock_irqrestore(&cq->lock, flags);
339 static void mlx4_en_tx_timeout(struct net_device *dev)
341 struct mlx4_en_priv *priv = netdev_priv(dev);
342 struct mlx4_en_dev *mdev = priv->mdev;
344 if (netif_msg_timer(priv))
345 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
347 priv->port_stats.tx_timeout++;
348 en_dbg(DRV, priv, "Scheduling watchdog\n");
349 queue_work(mdev->workqueue, &priv->watchdog_task);
353 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
355 struct mlx4_en_priv *priv = netdev_priv(dev);
357 spin_lock_bh(&priv->stats_lock);
358 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
359 spin_unlock_bh(&priv->stats_lock);
361 return &priv->ret_stats;
364 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
366 struct mlx4_en_cq *cq;
369 /* If we haven't received a specific coalescing setting
370 * (module param), we set the moderation parameters as follows:
371 * - moder_cnt is set to the number of mtu sized packets to
372 * satisfy our coelsing target.
373 * - moder_time is set to a fixed value.
375 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
376 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
377 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
378 "rx_frames:%d rx_usecs:%d\n",
379 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
381 /* Setup cq moderation params */
382 for (i = 0; i < priv->rx_ring_num; i++) {
383 cq = &priv->rx_cq[i];
384 cq->moder_cnt = priv->rx_frames;
385 cq->moder_time = priv->rx_usecs;
388 for (i = 0; i < priv->tx_ring_num; i++) {
389 cq = &priv->tx_cq[i];
390 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
391 cq->moder_time = MLX4_EN_TX_COAL_TIME;
394 /* Reset auto-moderation params */
395 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
396 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
397 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
398 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
399 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
400 priv->adaptive_rx_coal = 1;
401 priv->last_moder_time = MLX4_EN_AUTO_CONF;
402 priv->last_moder_jiffies = 0;
403 priv->last_moder_packets = 0;
404 priv->last_moder_tx_packets = 0;
405 priv->last_moder_bytes = 0;
408 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
410 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
411 struct mlx4_en_cq *cq;
412 unsigned long packets;
414 unsigned long avg_pkt_size;
415 unsigned long rx_packets;
416 unsigned long rx_bytes;
417 unsigned long tx_packets;
418 unsigned long tx_pkt_diff;
419 unsigned long rx_pkt_diff;
423 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
426 spin_lock_bh(&priv->stats_lock);
427 rx_packets = priv->stats.rx_packets;
428 rx_bytes = priv->stats.rx_bytes;
429 tx_packets = priv->stats.tx_packets;
430 spin_unlock_bh(&priv->stats_lock);
432 if (!priv->last_moder_jiffies || !period)
435 tx_pkt_diff = ((unsigned long) (tx_packets -
436 priv->last_moder_tx_packets));
437 rx_pkt_diff = ((unsigned long) (rx_packets -
438 priv->last_moder_packets));
439 packets = max(tx_pkt_diff, rx_pkt_diff);
440 rate = packets * HZ / period;
441 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
442 priv->last_moder_bytes)) / packets : 0;
444 /* Apply auto-moderation only when packet rate exceeds a rate that
446 if (rate > MLX4_EN_RX_RATE_THRESH) {
447 /* If tx and rx packet rates are not balanced, assume that
448 * traffic is mainly BW bound and apply maximum moderation.
449 * Otherwise, moderate according to packet rate */
450 if (2 * tx_pkt_diff > 3 * rx_pkt_diff ||
451 2 * rx_pkt_diff > 3 * tx_pkt_diff) {
452 moder_time = priv->rx_usecs_high;
454 if (rate < priv->pkt_rate_low)
455 moder_time = priv->rx_usecs_low;
456 else if (rate > priv->pkt_rate_high)
457 moder_time = priv->rx_usecs_high;
459 moder_time = (rate - priv->pkt_rate_low) *
460 (priv->rx_usecs_high - priv->rx_usecs_low) /
461 (priv->pkt_rate_high - priv->pkt_rate_low) +
465 /* When packet rate is low, use default moderation rather than
466 * 0 to prevent interrupt storms if traffic suddenly increases */
467 moder_time = priv->rx_usecs;
470 en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
471 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
473 en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
474 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
475 priv->last_moder_time, moder_time, period, packets,
478 if (moder_time != priv->last_moder_time) {
479 priv->last_moder_time = moder_time;
480 for (i = 0; i < priv->rx_ring_num; i++) {
481 cq = &priv->rx_cq[i];
482 cq->moder_time = moder_time;
483 err = mlx4_en_set_cq_moder(priv, cq);
485 en_err(priv, "Failed modifying moderation for cq:%d\n", i);
492 priv->last_moder_packets = rx_packets;
493 priv->last_moder_tx_packets = tx_packets;
494 priv->last_moder_bytes = rx_bytes;
495 priv->last_moder_jiffies = jiffies;
498 static void mlx4_en_do_get_stats(struct work_struct *work)
500 struct delayed_work *delay = to_delayed_work(work);
501 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
503 struct mlx4_en_dev *mdev = priv->mdev;
506 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
508 en_dbg(HW, priv, "Could not update stats \n");
510 mutex_lock(&mdev->state_lock);
511 if (mdev->device_up) {
513 mlx4_en_auto_moderation(priv);
515 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
517 mutex_unlock(&mdev->state_lock);
520 static void mlx4_en_linkstate(struct work_struct *work)
522 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
524 struct mlx4_en_dev *mdev = priv->mdev;
525 int linkstate = priv->link_state;
527 mutex_lock(&mdev->state_lock);
528 /* If observable port state changed set carrier state and
529 * report to system log */
530 if (priv->last_link_state != linkstate) {
531 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
532 en_dbg(LINK, priv, "Link Down\n");
533 netif_carrier_off(priv->dev);
535 en_dbg(LINK, priv, "Link Up\n");
536 netif_carrier_on(priv->dev);
539 priv->last_link_state = linkstate;
540 mutex_unlock(&mdev->state_lock);
544 int mlx4_en_start_port(struct net_device *dev)
546 struct mlx4_en_priv *priv = netdev_priv(dev);
547 struct mlx4_en_dev *mdev = priv->mdev;
548 struct mlx4_en_cq *cq;
549 struct mlx4_en_tx_ring *tx_ring;
557 en_dbg(DRV, priv, "start port called while port already up\n");
561 /* Calculate Rx buf size */
562 dev->mtu = min(dev->mtu, priv->max_mtu);
563 mlx4_en_calc_rx_buf(dev);
564 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
566 /* Configure rx cq's and rings */
567 err = mlx4_en_activate_rx_rings(priv);
569 en_err(priv, "Failed to activate RX rings\n");
572 for (i = 0; i < priv->rx_ring_num; i++) {
573 cq = &priv->rx_cq[i];
575 err = mlx4_en_activate_cq(priv, cq);
577 en_err(priv, "Failed activating Rx CQ\n");
580 for (j = 0; j < cq->size; j++)
581 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
582 err = mlx4_en_set_cq_moder(priv, cq);
584 en_err(priv, "Failed setting cq moderation parameters");
585 mlx4_en_deactivate_cq(priv, cq);
588 mlx4_en_arm_cq(priv, cq);
589 priv->rx_ring[i].cqn = cq->mcq.cqn;
593 err = mlx4_en_config_rss_steer(priv);
595 en_err(priv, "Failed configuring rss steering\n");
599 /* Configure tx cq's and rings */
600 for (i = 0; i < priv->tx_ring_num; i++) {
602 cq = &priv->tx_cq[i];
603 err = mlx4_en_activate_cq(priv, cq);
605 en_err(priv, "Failed allocating Tx CQ\n");
608 err = mlx4_en_set_cq_moder(priv, cq);
610 en_err(priv, "Failed setting cq moderation parameters");
611 mlx4_en_deactivate_cq(priv, cq);
614 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
615 cq->buf->wqe_index = cpu_to_be16(0xffff);
618 tx_ring = &priv->tx_ring[i];
619 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
620 priv->rx_ring[0].srq.srqn);
622 en_err(priv, "Failed allocating Tx ring\n");
623 mlx4_en_deactivate_cq(priv, cq);
626 /* Set initial ownership of all Tx TXBBs to SW (1) */
627 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
628 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
633 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
634 priv->rx_skb_size + ETH_FCS_LEN,
635 priv->prof->tx_pause,
637 priv->prof->rx_pause,
640 en_err(priv, "Failed setting port general configurations "
641 "for port %d, with error %d\n", priv->port, err);
644 /* Set default qp number */
645 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
647 en_err(priv, "Failed setting default qp numbers\n");
650 /* Set port mac number */
651 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
652 err = mlx4_register_mac(mdev->dev, priv->port,
653 priv->mac, &priv->mac_index);
655 en_err(priv, "Failed setting port mac\n");
660 en_dbg(HW, priv, "Initializing port\n");
661 err = mlx4_INIT_PORT(mdev->dev, priv->port);
663 en_err(priv, "Failed Initializing port\n");
667 /* Schedule multicast task to populate multicast list */
668 queue_work(mdev->workqueue, &priv->mcast_task);
670 priv->port_up = true;
671 netif_start_queue(dev);
675 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
678 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
679 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
682 mlx4_en_release_rss_steer(priv);
685 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
686 for (i = 0; i < priv->rx_ring_num; i++)
687 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
689 return err; /* need to close devices */
693 void mlx4_en_stop_port(struct net_device *dev)
695 struct mlx4_en_priv *priv = netdev_priv(dev);
696 struct mlx4_en_dev *mdev = priv->mdev;
699 if (!priv->port_up) {
700 en_dbg(DRV, priv, "stop port called while port already down\n");
703 netif_stop_queue(dev);
705 /* Synchronize with tx routine */
706 netif_tx_lock_bh(dev);
707 priv->port_up = false;
708 netif_tx_unlock_bh(dev);
711 mlx4_CLOSE_PORT(mdev->dev, priv->port);
713 /* Unregister Mac address for the port */
714 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
717 for (i = 0; i < priv->tx_ring_num; i++) {
718 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
719 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
723 for (i = 0; i < priv->tx_ring_num; i++)
724 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
727 mlx4_en_release_rss_steer(priv);
730 for (i = 0; i < priv->rx_ring_num; i++) {
731 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
732 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
734 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
738 static void mlx4_en_restart(struct work_struct *work)
740 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
742 struct mlx4_en_dev *mdev = priv->mdev;
743 struct net_device *dev = priv->dev;
745 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
747 mutex_lock(&mdev->state_lock);
749 mlx4_en_stop_port(dev);
750 if (mlx4_en_start_port(dev))
751 en_err(priv, "Failed restarting port %d\n", priv->port);
753 mutex_unlock(&mdev->state_lock);
757 static int mlx4_en_open(struct net_device *dev)
759 struct mlx4_en_priv *priv = netdev_priv(dev);
760 struct mlx4_en_dev *mdev = priv->mdev;
764 mutex_lock(&mdev->state_lock);
766 if (!mdev->device_up) {
767 en_err(priv, "Cannot open - device down/disabled\n");
772 /* Reset HW statistics and performance counters */
773 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
774 en_dbg(HW, priv, "Failed dumping statistics\n");
776 memset(&priv->stats, 0, sizeof(priv->stats));
777 memset(&priv->pstats, 0, sizeof(priv->pstats));
779 for (i = 0; i < priv->tx_ring_num; i++) {
780 priv->tx_ring[i].bytes = 0;
781 priv->tx_ring[i].packets = 0;
783 for (i = 0; i < priv->rx_ring_num; i++) {
784 priv->rx_ring[i].bytes = 0;
785 priv->rx_ring[i].packets = 0;
788 mlx4_en_set_default_moderation(priv);
789 err = mlx4_en_start_port(dev);
791 en_err(priv, "Failed starting port:%d\n", priv->port);
794 mutex_unlock(&mdev->state_lock);
799 static int mlx4_en_close(struct net_device *dev)
801 struct mlx4_en_priv *priv = netdev_priv(dev);
802 struct mlx4_en_dev *mdev = priv->mdev;
804 en_dbg(IFDOWN, priv, "Close port called\n");
806 mutex_lock(&mdev->state_lock);
808 mlx4_en_stop_port(dev);
809 netif_carrier_off(dev);
811 mutex_unlock(&mdev->state_lock);
815 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
819 for (i = 0; i < priv->tx_ring_num; i++) {
820 if (priv->tx_ring[i].tx_info)
821 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
822 if (priv->tx_cq[i].buf)
823 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
826 for (i = 0; i < priv->rx_ring_num; i++) {
827 if (priv->rx_ring[i].rx_info)
828 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
829 if (priv->rx_cq[i].buf)
830 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
834 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
836 struct mlx4_en_port_profile *prof = priv->prof;
839 /* Create tx Rings */
840 for (i = 0; i < priv->tx_ring_num; i++) {
841 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
842 prof->tx_ring_size, i, TX))
845 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
846 prof->tx_ring_size, TXBB_SIZE))
850 /* Create rx Rings */
851 for (i = 0; i < priv->rx_ring_num; i++) {
852 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
853 prof->rx_ring_size, i, RX))
856 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
857 prof->rx_ring_size, priv->stride))
864 en_err(priv, "Failed to allocate NIC resources\n");
869 void mlx4_en_destroy_netdev(struct net_device *dev)
871 struct mlx4_en_priv *priv = netdev_priv(dev);
872 struct mlx4_en_dev *mdev = priv->mdev;
874 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
876 /* Unregister device - this will close the port if it was up */
877 if (priv->registered)
878 unregister_netdev(dev);
881 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
883 cancel_delayed_work(&priv->stats_task);
884 cancel_delayed_work(&priv->refill_task);
885 /* flush any pending task for this netdev */
886 flush_workqueue(mdev->workqueue);
888 /* Detach the netdev so tasks would not attempt to access it */
889 mutex_lock(&mdev->state_lock);
890 mdev->pndev[priv->port] = NULL;
891 mutex_unlock(&mdev->state_lock);
893 mlx4_en_free_resources(priv);
897 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
899 struct mlx4_en_priv *priv = netdev_priv(dev);
900 struct mlx4_en_dev *mdev = priv->mdev;
903 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
906 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
907 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
912 if (netif_running(dev)) {
913 mutex_lock(&mdev->state_lock);
914 if (!mdev->device_up) {
915 /* NIC is probably restarting - let watchdog task reset
917 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
919 mlx4_en_stop_port(dev);
920 mlx4_en_set_default_moderation(priv);
921 err = mlx4_en_start_port(dev);
923 en_err(priv, "Failed restarting port:%d\n",
925 queue_work(mdev->workqueue, &priv->watchdog_task);
928 mutex_unlock(&mdev->state_lock);
933 static const struct net_device_ops mlx4_netdev_ops = {
934 .ndo_open = mlx4_en_open,
935 .ndo_stop = mlx4_en_close,
936 .ndo_start_xmit = mlx4_en_xmit,
937 .ndo_select_queue = mlx4_en_select_queue,
938 .ndo_get_stats = mlx4_en_get_stats,
939 .ndo_set_multicast_list = mlx4_en_set_multicast,
940 .ndo_set_mac_address = mlx4_en_set_mac,
941 .ndo_validate_addr = eth_validate_addr,
942 .ndo_change_mtu = mlx4_en_change_mtu,
943 .ndo_tx_timeout = mlx4_en_tx_timeout,
944 .ndo_vlan_rx_register = mlx4_en_vlan_rx_register,
945 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
946 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
947 #ifdef CONFIG_NET_POLL_CONTROLLER
948 .ndo_poll_controller = mlx4_en_netpoll,
952 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
953 struct mlx4_en_port_profile *prof)
955 struct net_device *dev;
956 struct mlx4_en_priv *priv;
960 dev = alloc_etherdev_mq(sizeof(struct mlx4_en_priv), prof->tx_ring_num);
962 mlx4_err(mdev, "Net device allocation failed\n");
966 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
969 * Initialize driver private data
972 priv = netdev_priv(dev);
973 memset(priv, 0, sizeof(struct mlx4_en_priv));
978 priv->port_up = false;
980 priv->flags = prof->flags;
981 priv->tx_ring_num = prof->tx_ring_num;
982 priv->rx_ring_num = prof->rx_ring_num;
983 priv->mc_list = NULL;
984 priv->mac_index = -1;
985 priv->msg_enable = MLX4_EN_MSG_LEVEL;
986 spin_lock_init(&priv->stats_lock);
987 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
988 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
989 INIT_DELAYED_WORK(&priv->refill_task, mlx4_en_rx_refill);
990 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
991 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
992 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
994 /* Query for default mac and max mtu */
995 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
996 priv->mac = mdev->dev->caps.def_mac[priv->port];
997 if (ILLEGAL_MAC(priv->mac)) {
998 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
999 priv->port, priv->mac);
1004 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1005 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1006 err = mlx4_en_alloc_resources(priv);
1010 /* Populate Rx default RSS mappings */
1011 mlx4_en_set_default_rss_map(priv, &priv->rss_map, priv->rx_ring_num *
1012 RSS_FACTOR, priv->rx_ring_num);
1013 /* Allocate page for receive rings */
1014 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1015 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1017 en_err(priv, "Failed to allocate page for rx qps\n");
1020 priv->allocated = 1;
1023 * Initialize netdev entry points
1025 dev->netdev_ops = &mlx4_netdev_ops;
1026 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1027 dev->real_num_tx_queues = MLX4_EN_NUM_TX_RINGS;
1029 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1031 /* Set defualt MAC */
1032 dev->addr_len = ETH_ALEN;
1033 for (i = 0; i < ETH_ALEN; i++)
1034 dev->dev_addr[ETH_ALEN - 1 - i] =
1035 (u8) (priv->mac >> (8 * i));
1038 * Set driver features
1040 dev->features |= NETIF_F_SG;
1041 dev->vlan_features |= NETIF_F_SG;
1042 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1043 dev->vlan_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1044 dev->features |= NETIF_F_HIGHDMA;
1045 dev->features |= NETIF_F_HW_VLAN_TX |
1046 NETIF_F_HW_VLAN_RX |
1047 NETIF_F_HW_VLAN_FILTER;
1048 if (mdev->profile.num_lro)
1049 dev->features |= NETIF_F_LRO;
1050 if (mdev->LSO_support) {
1051 dev->features |= NETIF_F_TSO;
1052 dev->features |= NETIF_F_TSO6;
1053 dev->vlan_features |= NETIF_F_TSO;
1054 dev->vlan_features |= NETIF_F_TSO6;
1057 mdev->pndev[port] = dev;
1059 netif_carrier_off(dev);
1060 err = register_netdev(dev);
1062 en_err(priv, "Netdev registration failed for port %d\n", port);
1066 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1067 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1069 priv->registered = 1;
1070 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1074 mlx4_en_destroy_netdev(dev);