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1/*
2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3 *
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:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
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.
22 *
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
30 * SOFTWARE.
31 *
32 */
33
34#include <linux/etherdevice.h>
35#include <linux/tcp.h>
36#include <linux/if_vlan.h>
37#include <linux/delay.h>
38#include <linux/slab.h>
39
40#include <linux/mlx4/driver.h>
41#include <linux/mlx4/device.h>
42#include <linux/mlx4/cmd.h>
43#include <linux/mlx4/cq.h>
44
45#include "mlx4_en.h"
46#include "en_port.h"
47
48static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
49{
50 struct mlx4_en_priv *priv = netdev_priv(dev);
51 struct mlx4_en_dev *mdev = priv->mdev;
52 int err;
53 int idx;
54
55 en_dbg(HW, priv, "adding VLAN:%d\n", vid);
56
57 set_bit(vid, priv->active_vlans);
58
59 /* Add VID to port VLAN filter */
60 mutex_lock(&mdev->state_lock);
61 if (mdev->device_up && priv->port_up) {
62 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
63 if (err)
64 en_err(priv, "Failed configuring VLAN filter\n");
65 }
66 if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
67 en_err(priv, "failed adding vlan %d\n", vid);
68 mutex_unlock(&mdev->state_lock);
69
70}
71
72static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
73{
74 struct mlx4_en_priv *priv = netdev_priv(dev);
75 struct mlx4_en_dev *mdev = priv->mdev;
76 int err;
77 int idx;
78
79 en_dbg(HW, priv, "Killing VID:%d\n", vid);
80
81 clear_bit(vid, priv->active_vlans);
82
83 /* Remove VID from port VLAN filter */
84 mutex_lock(&mdev->state_lock);
85 if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
86 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
87 else
88 en_err(priv, "could not find vid %d in cache\n", vid);
89
90 if (mdev->device_up && priv->port_up) {
91 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
92 if (err)
93 en_err(priv, "Failed configuring VLAN filter\n");
94 }
95 mutex_unlock(&mdev->state_lock);
96}
97
98u64 mlx4_en_mac_to_u64(u8 *addr)
99{
100 u64 mac = 0;
101 int i;
102
103 for (i = 0; i < ETH_ALEN; i++) {
104 mac <<= 8;
105 mac |= addr[i];
106 }
107 return mac;
108}
109
110static int mlx4_en_set_mac(struct net_device *dev, void *addr)
111{
112 struct mlx4_en_priv *priv = netdev_priv(dev);
113 struct mlx4_en_dev *mdev = priv->mdev;
114 struct sockaddr *saddr = addr;
115
116 if (!is_valid_ether_addr(saddr->sa_data))
117 return -EADDRNOTAVAIL;
118
119 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
120 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
121 queue_work(mdev->workqueue, &priv->mac_task);
122 return 0;
123}
124
125static void mlx4_en_do_set_mac(struct work_struct *work)
126{
127 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
128 mac_task);
129 struct mlx4_en_dev *mdev = priv->mdev;
130 int err = 0;
131
132 mutex_lock(&mdev->state_lock);
133 if (priv->port_up) {
134 /* Remove old MAC and insert the new one */
135 err = mlx4_replace_mac(mdev->dev, priv->port,
136 priv->base_qpn, priv->mac, 0);
137 if (err)
138 en_err(priv, "Failed changing HW MAC address\n");
139 } else
140 en_dbg(HW, priv, "Port is down while "
141 "registering mac, exiting...\n");
142
143 mutex_unlock(&mdev->state_lock);
144}
145
146static void mlx4_en_clear_list(struct net_device *dev)
147{
148 struct mlx4_en_priv *priv = netdev_priv(dev);
149
150 kfree(priv->mc_addrs);
151 priv->mc_addrs_cnt = 0;
152}
153
154static void mlx4_en_cache_mclist(struct net_device *dev)
155{
156 struct mlx4_en_priv *priv = netdev_priv(dev);
157 struct netdev_hw_addr *ha;
158 char *mc_addrs;
159 int mc_addrs_cnt = netdev_mc_count(dev);
160 int i;
161
162 mc_addrs = kmalloc(mc_addrs_cnt * ETH_ALEN, GFP_ATOMIC);
163 if (!mc_addrs) {
164 en_err(priv, "failed to allocate multicast list\n");
165 return;
166 }
167 i = 0;
168 netdev_for_each_mc_addr(ha, dev)
169 memcpy(mc_addrs + i++ * ETH_ALEN, ha->addr, ETH_ALEN);
170 priv->mc_addrs = mc_addrs;
171 priv->mc_addrs_cnt = mc_addrs_cnt;
172}
173
174
175static void mlx4_en_set_multicast(struct net_device *dev)
176{
177 struct mlx4_en_priv *priv = netdev_priv(dev);
178
179 if (!priv->port_up)
180 return;
181
182 queue_work(priv->mdev->workqueue, &priv->mcast_task);
183}
184
185static void mlx4_en_do_set_multicast(struct work_struct *work)
186{
187 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
188 mcast_task);
189 struct mlx4_en_dev *mdev = priv->mdev;
190 struct net_device *dev = priv->dev;
191 u64 mcast_addr = 0;
192 u8 mc_list[16] = {0};
193 int err;
194
195 mutex_lock(&mdev->state_lock);
196 if (!mdev->device_up) {
197 en_dbg(HW, priv, "Card is not up, "
198 "ignoring multicast change.\n");
199 goto out;
200 }
201 if (!priv->port_up) {
202 en_dbg(HW, priv, "Port is down, "
203 "ignoring multicast change.\n");
204 goto out;
205 }
206
207 /*
208 * Promsicuous mode: disable all filters
209 */
210
211 if (dev->flags & IFF_PROMISC) {
212 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
213 if (netif_msg_rx_status(priv))
214 en_warn(priv, "Entering promiscuous mode\n");
215 priv->flags |= MLX4_EN_FLAG_PROMISC;
216
217 /* Enable promiscouos mode */
218 if (!(mdev->dev->caps.flags &
219 MLX4_DEV_CAP_FLAG_VEP_UC_STEER))
220 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
221 priv->base_qpn, 1);
222 else
223 err = mlx4_unicast_promisc_add(mdev->dev, priv->base_qpn,
224 priv->port);
225 if (err)
226 en_err(priv, "Failed enabling "
227 "promiscuous mode\n");
228
229 /* Disable port multicast filter (unconditionally) */
230 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
231 0, MLX4_MCAST_DISABLE);
232 if (err)
233 en_err(priv, "Failed disabling "
234 "multicast filter\n");
235
236 /* Add the default qp number as multicast promisc */
237 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
238 err = mlx4_multicast_promisc_add(mdev->dev, priv->base_qpn,
239 priv->port);
240 if (err)
241 en_err(priv, "Failed entering multicast promisc mode\n");
242 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
243 }
244
245 /* Disable port VLAN filter */
246 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
247 if (err)
248 en_err(priv, "Failed disabling VLAN filter\n");
249 }
250 goto out;
251 }
252
253 /*
254 * Not in promiscuous mode
255 */
256
257 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
258 if (netif_msg_rx_status(priv))
259 en_warn(priv, "Leaving promiscuous mode\n");
260 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
261
262 /* Disable promiscouos mode */
263 if (!(mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))
264 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
265 priv->base_qpn, 0);
266 else
267 err = mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
268 priv->port);
269 if (err)
270 en_err(priv, "Failed disabling promiscuous mode\n");
271
272 /* Disable Multicast promisc */
273 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
274 err = mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
275 priv->port);
276 if (err)
277 en_err(priv, "Failed disabling multicast promiscuous mode\n");
278 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
279 }
280
281 /* Enable port VLAN filter */
282 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
283 if (err)
284 en_err(priv, "Failed enabling VLAN filter\n");
285 }
286
287 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
288 if (dev->flags & IFF_ALLMULTI) {
289 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
290 0, MLX4_MCAST_DISABLE);
291 if (err)
292 en_err(priv, "Failed disabling multicast filter\n");
293
294 /* Add the default qp number as multicast promisc */
295 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
296 err = mlx4_multicast_promisc_add(mdev->dev, priv->base_qpn,
297 priv->port);
298 if (err)
299 en_err(priv, "Failed entering multicast promisc mode\n");
300 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
301 }
302 } else {
303 int i;
304 /* Disable Multicast promisc */
305 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
306 err = mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
307 priv->port);
308 if (err)
309 en_err(priv, "Failed disabling multicast promiscuous mode\n");
310 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
311 }
312
313 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
314 0, MLX4_MCAST_DISABLE);
315 if (err)
316 en_err(priv, "Failed disabling multicast filter\n");
317
318 /* Detach our qp from all the multicast addresses */
319 for (i = 0; i < priv->mc_addrs_cnt; i++) {
320 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
321 mc_list[5] = priv->port;
322 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
323 mc_list, MLX4_PROT_ETH);
324 }
325 /* Flush mcast filter and init it with broadcast address */
326 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
327 1, MLX4_MCAST_CONFIG);
328
329 /* Update multicast list - we cache all addresses so they won't
330 * change while HW is updated holding the command semaphor */
331 netif_tx_lock_bh(dev);
332 mlx4_en_cache_mclist(dev);
333 netif_tx_unlock_bh(dev);
334 for (i = 0; i < priv->mc_addrs_cnt; i++) {
335 mcast_addr =
336 mlx4_en_mac_to_u64(priv->mc_addrs + i * ETH_ALEN);
337 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
338 mc_list[5] = priv->port;
339 mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp,
340 mc_list, 0, MLX4_PROT_ETH);
341 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
342 mcast_addr, 0, MLX4_MCAST_CONFIG);
343 }
344 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
345 0, MLX4_MCAST_ENABLE);
346 if (err)
347 en_err(priv, "Failed enabling multicast filter\n");
348 }
349out:
350 mutex_unlock(&mdev->state_lock);
351}
352
353#ifdef CONFIG_NET_POLL_CONTROLLER
354static void mlx4_en_netpoll(struct net_device *dev)
355{
356 struct mlx4_en_priv *priv = netdev_priv(dev);
357 struct mlx4_en_cq *cq;
358 unsigned long flags;
359 int i;
360
361 for (i = 0; i < priv->rx_ring_num; i++) {
362 cq = &priv->rx_cq[i];
363 spin_lock_irqsave(&cq->lock, flags);
364 napi_synchronize(&cq->napi);
365 mlx4_en_process_rx_cq(dev, cq, 0);
366 spin_unlock_irqrestore(&cq->lock, flags);
367 }
368}
369#endif
370
371static void mlx4_en_tx_timeout(struct net_device *dev)
372{
373 struct mlx4_en_priv *priv = netdev_priv(dev);
374 struct mlx4_en_dev *mdev = priv->mdev;
375
376 if (netif_msg_timer(priv))
377 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
378
379 priv->port_stats.tx_timeout++;
380 en_dbg(DRV, priv, "Scheduling watchdog\n");
381 queue_work(mdev->workqueue, &priv->watchdog_task);
382}
383
384
385static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
386{
387 struct mlx4_en_priv *priv = netdev_priv(dev);
388
389 spin_lock_bh(&priv->stats_lock);
390 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
391 spin_unlock_bh(&priv->stats_lock);
392
393 return &priv->ret_stats;
394}
395
396static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
397{
398 struct mlx4_en_cq *cq;
399 int i;
400
401 /* If we haven't received a specific coalescing setting
402 * (module param), we set the moderation parameters as follows:
403 * - moder_cnt is set to the number of mtu sized packets to
404 * satisfy our coelsing target.
405 * - moder_time is set to a fixed value.
406 */
407 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
408 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
409 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
410 "rx_frames:%d rx_usecs:%d\n",
411 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
412
413 /* Setup cq moderation params */
414 for (i = 0; i < priv->rx_ring_num; i++) {
415 cq = &priv->rx_cq[i];
416 cq->moder_cnt = priv->rx_frames;
417 cq->moder_time = priv->rx_usecs;
418 }
419
420 for (i = 0; i < priv->tx_ring_num; i++) {
421 cq = &priv->tx_cq[i];
422 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
423 cq->moder_time = MLX4_EN_TX_COAL_TIME;
424 }
425
426 /* Reset auto-moderation params */
427 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
428 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
429 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
430 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
431 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
432 priv->adaptive_rx_coal = 1;
433 priv->last_moder_time = MLX4_EN_AUTO_CONF;
434 priv->last_moder_jiffies = 0;
435 priv->last_moder_packets = 0;
436 priv->last_moder_tx_packets = 0;
437 priv->last_moder_bytes = 0;
438}
439
440static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
441{
442 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
443 struct mlx4_en_cq *cq;
444 unsigned long packets;
445 unsigned long rate;
446 unsigned long avg_pkt_size;
447 unsigned long rx_packets;
448 unsigned long rx_bytes;
449 unsigned long tx_packets;
450 unsigned long tx_pkt_diff;
451 unsigned long rx_pkt_diff;
452 int moder_time;
453 int i, err;
454
455 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
456 return;
457
458 spin_lock_bh(&priv->stats_lock);
459 rx_packets = priv->stats.rx_packets;
460 rx_bytes = priv->stats.rx_bytes;
461 tx_packets = priv->stats.tx_packets;
462 spin_unlock_bh(&priv->stats_lock);
463
464 if (!priv->last_moder_jiffies || !period)
465 goto out;
466
467 tx_pkt_diff = ((unsigned long) (tx_packets -
468 priv->last_moder_tx_packets));
469 rx_pkt_diff = ((unsigned long) (rx_packets -
470 priv->last_moder_packets));
471 packets = max(tx_pkt_diff, rx_pkt_diff);
472 rate = packets * HZ / period;
473 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
474 priv->last_moder_bytes)) / packets : 0;
475
476 /* Apply auto-moderation only when packet rate exceeds a rate that
477 * it matters */
478 if (rate > MLX4_EN_RX_RATE_THRESH && avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
479 /* If tx and rx packet rates are not balanced, assume that
480 * traffic is mainly BW bound and apply maximum moderation.
481 * Otherwise, moderate according to packet rate */
482 if (2 * tx_pkt_diff > 3 * rx_pkt_diff ||
483 2 * rx_pkt_diff > 3 * tx_pkt_diff) {
484 moder_time = priv->rx_usecs_high;
485 } else {
486 if (rate < priv->pkt_rate_low)
487 moder_time = priv->rx_usecs_low;
488 else if (rate > priv->pkt_rate_high)
489 moder_time = priv->rx_usecs_high;
490 else
491 moder_time = (rate - priv->pkt_rate_low) *
492 (priv->rx_usecs_high - priv->rx_usecs_low) /
493 (priv->pkt_rate_high - priv->pkt_rate_low) +
494 priv->rx_usecs_low;
495 }
496 } else {
497 moder_time = priv->rx_usecs_low;
498 }
499
500 en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
501 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
502
503 en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
504 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
505 priv->last_moder_time, moder_time, period, packets,
506 avg_pkt_size, rate);
507
508 if (moder_time != priv->last_moder_time) {
509 priv->last_moder_time = moder_time;
510 for (i = 0; i < priv->rx_ring_num; i++) {
511 cq = &priv->rx_cq[i];
512 cq->moder_time = moder_time;
513 err = mlx4_en_set_cq_moder(priv, cq);
514 if (err) {
515 en_err(priv, "Failed modifying moderation for cq:%d\n", i);
516 break;
517 }
518 }
519 }
520
521out:
522 priv->last_moder_packets = rx_packets;
523 priv->last_moder_tx_packets = tx_packets;
524 priv->last_moder_bytes = rx_bytes;
525 priv->last_moder_jiffies = jiffies;
526}
527
528static void mlx4_en_do_get_stats(struct work_struct *work)
529{
530 struct delayed_work *delay = to_delayed_work(work);
531 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
532 stats_task);
533 struct mlx4_en_dev *mdev = priv->mdev;
534 int err;
535
536 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
537 if (err)
538 en_dbg(HW, priv, "Could not update stats\n");
539
540 mutex_lock(&mdev->state_lock);
541 if (mdev->device_up) {
542 if (priv->port_up)
543 mlx4_en_auto_moderation(priv);
544
545 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
546 }
547 if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
548 queue_work(mdev->workqueue, &priv->mac_task);
549 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
550 }
551 mutex_unlock(&mdev->state_lock);
552}
553
554static void mlx4_en_linkstate(struct work_struct *work)
555{
556 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
557 linkstate_task);
558 struct mlx4_en_dev *mdev = priv->mdev;
559 int linkstate = priv->link_state;
560
561 mutex_lock(&mdev->state_lock);
562 /* If observable port state changed set carrier state and
563 * report to system log */
564 if (priv->last_link_state != linkstate) {
565 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
566 en_info(priv, "Link Down\n");
567 netif_carrier_off(priv->dev);
568 } else {
569 en_info(priv, "Link Up\n");
570 netif_carrier_on(priv->dev);
571 }
572 }
573 priv->last_link_state = linkstate;
574 mutex_unlock(&mdev->state_lock);
575}
576
577
578int mlx4_en_start_port(struct net_device *dev)
579{
580 struct mlx4_en_priv *priv = netdev_priv(dev);
581 struct mlx4_en_dev *mdev = priv->mdev;
582 struct mlx4_en_cq *cq;
583 struct mlx4_en_tx_ring *tx_ring;
584 int rx_index = 0;
585 int tx_index = 0;
586 int err = 0;
587 int i;
588 int j;
589 u8 mc_list[16] = {0};
590 char name[32];
591
592 if (priv->port_up) {
593 en_dbg(DRV, priv, "start port called while port already up\n");
594 return 0;
595 }
596
597 /* Calculate Rx buf size */
598 dev->mtu = min(dev->mtu, priv->max_mtu);
599 mlx4_en_calc_rx_buf(dev);
600 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
601
602 /* Configure rx cq's and rings */
603 err = mlx4_en_activate_rx_rings(priv);
604 if (err) {
605 en_err(priv, "Failed to activate RX rings\n");
606 return err;
607 }
608 for (i = 0; i < priv->rx_ring_num; i++) {
609 cq = &priv->rx_cq[i];
610
611 err = mlx4_en_activate_cq(priv, cq);
612 if (err) {
613 en_err(priv, "Failed activating Rx CQ\n");
614 goto cq_err;
615 }
616 for (j = 0; j < cq->size; j++)
617 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
618 err = mlx4_en_set_cq_moder(priv, cq);
619 if (err) {
620 en_err(priv, "Failed setting cq moderation parameters");
621 mlx4_en_deactivate_cq(priv, cq);
622 goto cq_err;
623 }
624 mlx4_en_arm_cq(priv, cq);
625 priv->rx_ring[i].cqn = cq->mcq.cqn;
626 ++rx_index;
627 }
628
629 /* Set port mac number */
630 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
631 err = mlx4_register_mac(mdev->dev, priv->port,
632 priv->mac, &priv->base_qpn, 0);
633 if (err) {
634 en_err(priv, "Failed setting port mac\n");
635 goto cq_err;
636 }
637 mdev->mac_removed[priv->port] = 0;
638
639 err = mlx4_en_config_rss_steer(priv);
640 if (err) {
641 en_err(priv, "Failed configuring rss steering\n");
642 goto mac_err;
643 }
644
645 if (mdev->dev->caps.comp_pool && !priv->tx_vector) {
646 sprintf(name , "%s-tx", priv->dev->name);
647 if (mlx4_assign_eq(mdev->dev , name, &priv->tx_vector)) {
648 mlx4_warn(mdev, "Failed Assigning an EQ to "
649 "%s_tx ,Falling back to legacy "
650 "EQ's\n", priv->dev->name);
651 }
652 }
653 /* Configure tx cq's and rings */
654 for (i = 0; i < priv->tx_ring_num; i++) {
655 /* Configure cq */
656 cq = &priv->tx_cq[i];
657 cq->vector = priv->tx_vector;
658 err = mlx4_en_activate_cq(priv, cq);
659 if (err) {
660 en_err(priv, "Failed allocating Tx CQ\n");
661 goto tx_err;
662 }
663 err = mlx4_en_set_cq_moder(priv, cq);
664 if (err) {
665 en_err(priv, "Failed setting cq moderation parameters");
666 mlx4_en_deactivate_cq(priv, cq);
667 goto tx_err;
668 }
669 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
670 cq->buf->wqe_index = cpu_to_be16(0xffff);
671
672 /* Configure ring */
673 tx_ring = &priv->tx_ring[i];
674 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn);
675 if (err) {
676 en_err(priv, "Failed allocating Tx ring\n");
677 mlx4_en_deactivate_cq(priv, cq);
678 goto tx_err;
679 }
680 /* Set initial ownership of all Tx TXBBs to SW (1) */
681 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
682 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
683 ++tx_index;
684 }
685
686 /* Configure port */
687 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
688 priv->rx_skb_size + ETH_FCS_LEN,
689 priv->prof->tx_pause,
690 priv->prof->tx_ppp,
691 priv->prof->rx_pause,
692 priv->prof->rx_ppp);
693 if (err) {
694 en_err(priv, "Failed setting port general configurations "
695 "for port %d, with error %d\n", priv->port, err);
696 goto tx_err;
697 }
698 /* Set default qp number */
699 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
700 if (err) {
701 en_err(priv, "Failed setting default qp numbers\n");
702 goto tx_err;
703 }
704
705 /* Init port */
706 en_dbg(HW, priv, "Initializing port\n");
707 err = mlx4_INIT_PORT(mdev->dev, priv->port);
708 if (err) {
709 en_err(priv, "Failed Initializing port\n");
710 goto tx_err;
711 }
712
713 /* Attach rx QP to bradcast address */
714 memset(&mc_list[10], 0xff, ETH_ALEN);
715 mc_list[5] = priv->port;
716 if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
717 0, MLX4_PROT_ETH))
718 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
719
720 /* Must redo promiscuous mode setup. */
721 priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
722
723 /* Schedule multicast task to populate multicast list */
724 queue_work(mdev->workqueue, &priv->mcast_task);
725
726 priv->port_up = true;
727 netif_tx_start_all_queues(dev);
728 return 0;
729
730tx_err:
731 while (tx_index--) {
732 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
733 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
734 }
735
736 mlx4_en_release_rss_steer(priv);
737mac_err:
738 mlx4_unregister_mac(mdev->dev, priv->port, priv->base_qpn);
739cq_err:
740 while (rx_index--)
741 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
742 for (i = 0; i < priv->rx_ring_num; i++)
743 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
744
745 return err; /* need to close devices */
746}
747
748
749void mlx4_en_stop_port(struct net_device *dev)
750{
751 struct mlx4_en_priv *priv = netdev_priv(dev);
752 struct mlx4_en_dev *mdev = priv->mdev;
753 int i;
754 u8 mc_list[16] = {0};
755
756 if (!priv->port_up) {
757 en_dbg(DRV, priv, "stop port called while port already down\n");
758 return;
759 }
760
761 /* Synchronize with tx routine */
762 netif_tx_lock_bh(dev);
763 netif_tx_stop_all_queues(dev);
764 netif_tx_unlock_bh(dev);
765
766 /* Set port as not active */
767 priv->port_up = false;
768
769 /* Detach All multicasts */
770 memset(&mc_list[10], 0xff, ETH_ALEN);
771 mc_list[5] = priv->port;
772 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
773 MLX4_PROT_ETH);
774 for (i = 0; i < priv->mc_addrs_cnt; i++) {
775 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
776 mc_list[5] = priv->port;
777 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
778 mc_list, MLX4_PROT_ETH);
779 }
780 mlx4_en_clear_list(dev);
781 /* Flush multicast filter */
782 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
783
784 /* Unregister Mac address for the port */
785 mlx4_unregister_mac(mdev->dev, priv->port, priv->base_qpn);
786 mdev->mac_removed[priv->port] = 1;
787
788 /* Free TX Rings */
789 for (i = 0; i < priv->tx_ring_num; i++) {
790 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
791 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
792 }
793 msleep(10);
794
795 for (i = 0; i < priv->tx_ring_num; i++)
796 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
797
798 /* Free RSS qps */
799 mlx4_en_release_rss_steer(priv);
800
801 /* Free RX Rings */
802 for (i = 0; i < priv->rx_ring_num; i++) {
803 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
804 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
805 msleep(1);
806 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
807 }
808
809 /* close port*/
810 mlx4_CLOSE_PORT(mdev->dev, priv->port);
811}
812
813static void mlx4_en_restart(struct work_struct *work)
814{
815 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
816 watchdog_task);
817 struct mlx4_en_dev *mdev = priv->mdev;
818 struct net_device *dev = priv->dev;
819
820 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
821
822 mutex_lock(&mdev->state_lock);
823 if (priv->port_up) {
824 mlx4_en_stop_port(dev);
825 if (mlx4_en_start_port(dev))
826 en_err(priv, "Failed restarting port %d\n", priv->port);
827 }
828 mutex_unlock(&mdev->state_lock);
829}
830
831
832static int mlx4_en_open(struct net_device *dev)
833{
834 struct mlx4_en_priv *priv = netdev_priv(dev);
835 struct mlx4_en_dev *mdev = priv->mdev;
836 int i;
837 int err = 0;
838
839 mutex_lock(&mdev->state_lock);
840
841 if (!mdev->device_up) {
842 en_err(priv, "Cannot open - device down/disabled\n");
843 err = -EBUSY;
844 goto out;
845 }
846
847 /* Reset HW statistics and performance counters */
848 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
849 en_dbg(HW, priv, "Failed dumping statistics\n");
850
851 memset(&priv->stats, 0, sizeof(priv->stats));
852 memset(&priv->pstats, 0, sizeof(priv->pstats));
853
854 for (i = 0; i < priv->tx_ring_num; i++) {
855 priv->tx_ring[i].bytes = 0;
856 priv->tx_ring[i].packets = 0;
857 }
858 for (i = 0; i < priv->rx_ring_num; i++) {
859 priv->rx_ring[i].bytes = 0;
860 priv->rx_ring[i].packets = 0;
861 }
862
863 err = mlx4_en_start_port(dev);
864 if (err)
865 en_err(priv, "Failed starting port:%d\n", priv->port);
866
867out:
868 mutex_unlock(&mdev->state_lock);
869 return err;
870}
871
872
873static int mlx4_en_close(struct net_device *dev)
874{
875 struct mlx4_en_priv *priv = netdev_priv(dev);
876 struct mlx4_en_dev *mdev = priv->mdev;
877
878 en_dbg(IFDOWN, priv, "Close port called\n");
879
880 mutex_lock(&mdev->state_lock);
881
882 mlx4_en_stop_port(dev);
883 netif_carrier_off(dev);
884
885 mutex_unlock(&mdev->state_lock);
886 return 0;
887}
888
889void mlx4_en_free_resources(struct mlx4_en_priv *priv, bool reserve_vectors)
890{
891 int i;
892
893 for (i = 0; i < priv->tx_ring_num; i++) {
894 if (priv->tx_ring[i].tx_info)
895 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
896 if (priv->tx_cq[i].buf)
897 mlx4_en_destroy_cq(priv, &priv->tx_cq[i], reserve_vectors);
898 }
899
900 for (i = 0; i < priv->rx_ring_num; i++) {
901 if (priv->rx_ring[i].rx_info)
902 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
903 if (priv->rx_cq[i].buf)
904 mlx4_en_destroy_cq(priv, &priv->rx_cq[i], reserve_vectors);
905 }
906}
907
908int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
909{
910 struct mlx4_en_port_profile *prof = priv->prof;
911 int i;
912 int base_tx_qpn, err;
913
914 err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &base_tx_qpn);
915 if (err) {
916 en_err(priv, "failed reserving range for TX rings\n");
917 return err;
918 }
919
920 /* Create tx Rings */
921 for (i = 0; i < priv->tx_ring_num; i++) {
922 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
923 prof->tx_ring_size, i, TX))
924 goto err;
925
926 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], base_tx_qpn + i,
927 prof->tx_ring_size, TXBB_SIZE))
928 goto err;
929 }
930
931 /* Create rx Rings */
932 for (i = 0; i < priv->rx_ring_num; i++) {
933 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
934 prof->rx_ring_size, i, RX))
935 goto err;
936
937 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
938 prof->rx_ring_size, priv->stride))
939 goto err;
940 }
941
942 return 0;
943
944err:
945 en_err(priv, "Failed to allocate NIC resources\n");
946 mlx4_qp_release_range(priv->mdev->dev, base_tx_qpn, priv->tx_ring_num);
947 return -ENOMEM;
948}
949
950
951void mlx4_en_destroy_netdev(struct net_device *dev)
952{
953 struct mlx4_en_priv *priv = netdev_priv(dev);
954 struct mlx4_en_dev *mdev = priv->mdev;
955
956 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
957
958 /* Unregister device - this will close the port if it was up */
959 if (priv->registered)
960 unregister_netdev(dev);
961
962 if (priv->allocated)
963 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
964
965 cancel_delayed_work(&priv->stats_task);
966 /* flush any pending task for this netdev */
967 flush_workqueue(mdev->workqueue);
968
969 /* Detach the netdev so tasks would not attempt to access it */
970 mutex_lock(&mdev->state_lock);
971 mdev->pndev[priv->port] = NULL;
972 mutex_unlock(&mdev->state_lock);
973
974 mlx4_en_free_resources(priv, false);
975 free_netdev(dev);
976}
977
978static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
979{
980 struct mlx4_en_priv *priv = netdev_priv(dev);
981 struct mlx4_en_dev *mdev = priv->mdev;
982 int err = 0;
983
984 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
985 dev->mtu, new_mtu);
986
987 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
988 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
989 return -EPERM;
990 }
991 dev->mtu = new_mtu;
992
993 if (netif_running(dev)) {
994 mutex_lock(&mdev->state_lock);
995 if (!mdev->device_up) {
996 /* NIC is probably restarting - let watchdog task reset
997 * the port */
998 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
999 } else {
1000 mlx4_en_stop_port(dev);
1001 err = mlx4_en_start_port(dev);
1002 if (err) {
1003 en_err(priv, "Failed restarting port:%d\n",
1004 priv->port);
1005 queue_work(mdev->workqueue, &priv->watchdog_task);
1006 }
1007 }
1008 mutex_unlock(&mdev->state_lock);
1009 }
1010 return 0;
1011}
1012
1013static const struct net_device_ops mlx4_netdev_ops = {
1014 .ndo_open = mlx4_en_open,
1015 .ndo_stop = mlx4_en_close,
1016 .ndo_start_xmit = mlx4_en_xmit,
1017 .ndo_select_queue = mlx4_en_select_queue,
1018 .ndo_get_stats = mlx4_en_get_stats,
1019 .ndo_set_multicast_list = mlx4_en_set_multicast,
1020 .ndo_set_mac_address = mlx4_en_set_mac,
1021 .ndo_validate_addr = eth_validate_addr,
1022 .ndo_change_mtu = mlx4_en_change_mtu,
1023 .ndo_tx_timeout = mlx4_en_tx_timeout,
1024 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
1025 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
1026#ifdef CONFIG_NET_POLL_CONTROLLER
1027 .ndo_poll_controller = mlx4_en_netpoll,
1028#endif
1029};
1030
1031int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
1032 struct mlx4_en_port_profile *prof)
1033{
1034 struct net_device *dev;
1035 struct mlx4_en_priv *priv;
1036 int i;
1037 int err;
1038
1039 dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1040 prof->tx_ring_num, prof->rx_ring_num);
1041 if (dev == NULL) {
1042 mlx4_err(mdev, "Net device allocation failed\n");
1043 return -ENOMEM;
1044 }
1045
1046 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1047 dev->dev_id = port - 1;
1048
1049 /*
1050 * Initialize driver private data
1051 */
1052
1053 priv = netdev_priv(dev);
1054 memset(priv, 0, sizeof(struct mlx4_en_priv));
1055 priv->dev = dev;
1056 priv->mdev = mdev;
1057 priv->prof = prof;
1058 priv->port = port;
1059 priv->port_up = false;
1060 priv->flags = prof->flags;
1061 priv->tx_ring_num = prof->tx_ring_num;
1062 priv->rx_ring_num = prof->rx_ring_num;
1063 priv->mac_index = -1;
1064 priv->msg_enable = MLX4_EN_MSG_LEVEL;
1065 spin_lock_init(&priv->stats_lock);
1066 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1067 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1068 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1069 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1070 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1071
1072 /* Query for default mac and max mtu */
1073 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1074 priv->mac = mdev->dev->caps.def_mac[priv->port];
1075 if (ILLEGAL_MAC(priv->mac)) {
1076 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1077 priv->port, priv->mac);
1078 err = -EINVAL;
1079 goto out;
1080 }
1081
1082 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1083 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1084 err = mlx4_en_alloc_resources(priv);
1085 if (err)
1086 goto out;
1087
1088 /* Allocate page for receive rings */
1089 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1090 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1091 if (err) {
1092 en_err(priv, "Failed to allocate page for rx qps\n");
1093 goto out;
1094 }
1095 priv->allocated = 1;
1096
1097 /*
1098 * Initialize netdev entry points
1099 */
1100 dev->netdev_ops = &mlx4_netdev_ops;
1101 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1102 netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1103 netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1104
1105 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1106
1107 /* Set defualt MAC */
1108 dev->addr_len = ETH_ALEN;
1109 for (i = 0; i < ETH_ALEN; i++) {
1110 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1111 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1112 }
1113
1114 /*
1115 * Set driver features
1116 */
1117 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1118 if (mdev->LSO_support)
1119 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1120
1121 dev->vlan_features = dev->hw_features;
1122
1123 dev->hw_features |= NETIF_F_RXCSUM;
1124 dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1125 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1126 NETIF_F_HW_VLAN_FILTER;
1127
1128 mdev->pndev[port] = dev;
1129
1130 netif_carrier_off(dev);
1131 err = register_netdev(dev);
1132 if (err) {
1133 en_err(priv, "Netdev registration failed for port %d\n", port);
1134 goto out;
1135 }
1136
1137 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1138 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1139
1140 /* Configure port */
1141 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1142 MLX4_EN_MIN_MTU,
1143 0, 0, 0, 0);
1144 if (err) {
1145 en_err(priv, "Failed setting port general configurations "
1146 "for port %d, with error %d\n", priv->port, err);
1147 goto out;
1148 }
1149
1150 /* Init port */
1151 en_warn(priv, "Initializing port\n");
1152 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1153 if (err) {
1154 en_err(priv, "Failed Initializing port\n");
1155 goto out;
1156 }
1157 priv->registered = 1;
1158 mlx4_en_set_default_moderation(priv);
1159 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1160 return 0;
1161
1162out:
1163 mlx4_en_destroy_netdev(dev);
1164 return err;
1165}
1166