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ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / drivers / net / mlx4 / en_netdev.c
blob61850adae6f77a071fb29307ffbb59c517ff8892
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
48
49 static void mlx4_en_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
50 {
51 struct mlx4_en_priv *priv = netdev_priv(dev);
52 struct mlx4_en_dev *mdev = priv->mdev;
53 int err;
54
55 en_dbg(HW, priv, "Registering VLAN group:%p\n", grp);
56 priv->vlgrp = grp;
57
58 mutex_lock(&mdev->state_lock);
59 if (mdev->device_up && priv->port_up) {
60 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, grp);
61 if (err)
62 en_err(priv, "Failed configuring VLAN filter\n");
63 }
64 mutex_unlock(&mdev->state_lock);
65 }
66
67 static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
68 {
69 struct mlx4_en_priv *priv = netdev_priv(dev);
70 struct mlx4_en_dev *mdev = priv->mdev;
71 int err;
72 int idx;
73
74 if (!priv->vlgrp)
75 return;
76
77 en_dbg(HW, priv, "adding VLAN:%d (vlgrp entry:%p)\n",
78 vid, vlan_group_get_device(priv->vlgrp, vid));
79
80 /* Add VID to port VLAN filter */
81 mutex_lock(&mdev->state_lock);
82 if (mdev->device_up && priv->port_up) {
83 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
84 if (err)
85 en_err(priv, "Failed configuring VLAN filter\n");
86 }
87 if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
88 en_err(priv, "failed adding vlan %d\n", vid);
89 mutex_unlock(&mdev->state_lock);
90
91 }
92
93 static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
94 {
95 struct mlx4_en_priv *priv = netdev_priv(dev);
96 struct mlx4_en_dev *mdev = priv->mdev;
97 int err;
98 int idx;
99
100 if (!priv->vlgrp)
101 return;
102
103 en_dbg(HW, priv, "Killing VID:%d (vlgrp:%p vlgrp entry:%p)\n",
104 vid, priv->vlgrp, vlan_group_get_device(priv->vlgrp, vid));
105 vlan_group_set_device(priv->vlgrp, vid, NULL);
106
107 /* Remove VID from port VLAN filter */
108 mutex_lock(&mdev->state_lock);
109 if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
110 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
111 else
112 en_err(priv, "could not find vid %d in cache\n", vid);
113
114 if (mdev->device_up && priv->port_up) {
115 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
116 if (err)
117 en_err(priv, "Failed configuring VLAN filter\n");
118 }
119 mutex_unlock(&mdev->state_lock);
120 }
121
122 u64 mlx4_en_mac_to_u64(u8 *addr)
123 {
124 u64 mac = 0;
125 int i;
126
127 for (i = 0; i < ETH_ALEN; i++) {
128 mac <<= 8;
129 mac |= addr[i];
130 }
131 return mac;
132 }
133
134 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
135 {
136 struct mlx4_en_priv *priv = netdev_priv(dev);
137 struct mlx4_en_dev *mdev = priv->mdev;
138 struct sockaddr *saddr = addr;
139
140 if (!is_valid_ether_addr(saddr->sa_data))
141 return -EADDRNOTAVAIL;
142
143 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
144 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
145 queue_work(mdev->workqueue, &priv->mac_task);
146 return 0;
147 }
148
149 static void mlx4_en_do_set_mac(struct work_struct *work)
150 {
151 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
152 mac_task);
153 struct mlx4_en_dev *mdev = priv->mdev;
154 int err = 0;
155
156 mutex_lock(&mdev->state_lock);
157 if (priv->port_up) {
158 /* Remove old MAC and insert the new one */
159 err = mlx4_replace_mac(mdev->dev, priv->port,
160 priv->base_qpn, priv->mac, 0);
161 if (err)
162 en_err(priv, "Failed changing HW MAC address\n");
163 } else
164 en_dbg(HW, priv, "Port is down while "
165 "registering mac, exiting...\n");
166
167 mutex_unlock(&mdev->state_lock);
168 }
169
170 static void mlx4_en_clear_list(struct net_device *dev)
171 {
172 struct mlx4_en_priv *priv = netdev_priv(dev);
173
174 kfree(priv->mc_addrs);
175 priv->mc_addrs_cnt = 0;
176 }
177
178 static void mlx4_en_cache_mclist(struct net_device *dev)
179 {
180 struct mlx4_en_priv *priv = netdev_priv(dev);
181 struct netdev_hw_addr *ha;
182 char *mc_addrs;
183 int mc_addrs_cnt = netdev_mc_count(dev);
184 int i;
185
186 mc_addrs = kmalloc(mc_addrs_cnt * ETH_ALEN, GFP_ATOMIC);
187 if (!mc_addrs) {
188 en_err(priv, "failed to allocate multicast list\n");
189 return;
190 }
191 i = 0;
192 netdev_for_each_mc_addr(ha, dev)
193 memcpy(mc_addrs + i++ * ETH_ALEN, ha->addr, ETH_ALEN);
194 priv->mc_addrs = mc_addrs;
195 priv->mc_addrs_cnt = mc_addrs_cnt;
196 }
197
198
199 static void mlx4_en_set_multicast(struct net_device *dev)
200 {
201 struct mlx4_en_priv *priv = netdev_priv(dev);
202
203 if (!priv->port_up)
204 return;
205
206 queue_work(priv->mdev->workqueue, &priv->mcast_task);
207 }
208
209 static void mlx4_en_do_set_multicast(struct work_struct *work)
210 {
211 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
212 mcast_task);
213 struct mlx4_en_dev *mdev = priv->mdev;
214 struct net_device *dev = priv->dev;
215 u64 mcast_addr = 0;
216 u8 mc_list[16] = {0};
217 int err;
218
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");
223 goto out;
224 }
225 if (!priv->port_up) {
226 en_dbg(HW, priv, "Port is down, "
227 "ignoring multicast change.\n");
228 goto out;
229 }
230
231 /*
232 * Promsicuous mode: disable all filters
233 */
234
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;
240
241 /* Enable promiscouos mode */
242 if (!mdev->dev->caps.vep_uc_steering)
243 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
244 priv->base_qpn, 1);
245 else
246 err = mlx4_unicast_promisc_add(mdev->dev, priv->base_qpn,
247 priv->port);
248 if (err)
249 en_err(priv, "Failed enabling "
250 "promiscuous mode\n");
251
252 /* Disable port multicast filter (unconditionally) */
253 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
254 0, MLX4_MCAST_DISABLE);
255 if (err)
256 en_err(priv, "Failed disabling "
257 "multicast filter\n");
258
259 /* Add the default qp number as multicast promisc */
260 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
261 err = mlx4_multicast_promisc_add(mdev->dev, priv->base_qpn,
262 priv->port);
263 if (err)
264 en_err(priv, "Failed entering multicast promisc mode\n");
265 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
266 }
267
268 if (priv->vlgrp) {
269 /* Disable port VLAN filter */
270 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
271 if (err)
272 en_err(priv, "Failed disabling VLAN filter\n");
273 }
274 }
275 goto out;
276 }
277
278 /*
279 * Not in promiscuous mode
280 */
281
282 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
283 if (netif_msg_rx_status(priv))
284 en_warn(priv, "Leaving promiscuous mode\n");
285 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
286
287 /* Disable promiscouos mode */
288 if (!mdev->dev->caps.vep_uc_steering)
289 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
290 priv->base_qpn, 0);
291 else
292 err = mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
293 priv->port);
294 if (err)
295 en_err(priv, "Failed disabling promiscuous mode\n");
296
297 /* Disable Multicast promisc */
298 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
299 err = mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
300 priv->port);
301 if (err)
302 en_err(priv, "Failed disabling multicast promiscuous mode\n");
303 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
304 }
305
306 /* Enable port VLAN filter */
307 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
308 if (err)
309 en_err(priv, "Failed enabling VLAN filter\n");
310 }
311
312 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
313 if (dev->flags & IFF_ALLMULTI) {
314 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
315 0, MLX4_MCAST_DISABLE);
316 if (err)
317 en_err(priv, "Failed disabling multicast filter\n");
318
319 /* Add the default qp number as multicast promisc */
320 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
321 err = mlx4_multicast_promisc_add(mdev->dev, priv->base_qpn,
322 priv->port);
323 if (err)
324 en_err(priv, "Failed entering multicast promisc mode\n");
325 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
326 }
327 } else {
328 int i;
329 /* Disable Multicast promisc */
330 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
331 err = mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
332 priv->port);
333 if (err)
334 en_err(priv, "Failed disabling multicast promiscuous mode\n");
335 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
336 }
337
338 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
339 0, MLX4_MCAST_DISABLE);
340 if (err)
341 en_err(priv, "Failed disabling multicast filter\n");
342
343 /* Detach our qp from all the multicast addresses */
344 for (i = 0; i < priv->mc_addrs_cnt; i++) {
345 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
346 mc_list[5] = priv->port;
347 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
348 mc_list, MLX4_PROT_ETH);
349 }
350 /* Flush mcast filter and init it with broadcast address */
351 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
352 1, MLX4_MCAST_CONFIG);
353
354 /* Update multicast list - we cache all addresses so they won't
355 * change while HW is updated holding the command semaphor */
356 netif_tx_lock_bh(dev);
357 mlx4_en_cache_mclist(dev);
358 netif_tx_unlock_bh(dev);
359 for (i = 0; i < priv->mc_addrs_cnt; i++) {
360 mcast_addr =
361 mlx4_en_mac_to_u64(priv->mc_addrs + i * ETH_ALEN);
362 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
363 mc_list[5] = priv->port;
364 mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp,
365 mc_list, 0, MLX4_PROT_ETH);
366 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
367 mcast_addr, 0, MLX4_MCAST_CONFIG);
368 }
369 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
370 0, MLX4_MCAST_ENABLE);
371 if (err)
372 en_err(priv, "Failed enabling multicast filter\n");
373 }
374 out:
375 mutex_unlock(&mdev->state_lock);
376 }
377
378 #ifdef CONFIG_NET_POLL_CONTROLLER
379 static void mlx4_en_netpoll(struct net_device *dev)
380 {
381 struct mlx4_en_priv *priv = netdev_priv(dev);
382 struct mlx4_en_cq *cq;
383 unsigned long flags;
384 int i;
385
386 for (i = 0; i < priv->rx_ring_num; i++) {
387 cq = &priv->rx_cq[i];
388 spin_lock_irqsave(&cq->lock, flags);
389 napi_synchronize(&cq->napi);
390 mlx4_en_process_rx_cq(dev, cq, 0);
391 spin_unlock_irqrestore(&cq->lock, flags);
392 }
393 }
394 #endif
395
396 static void mlx4_en_tx_timeout(struct net_device *dev)
397 {
398 struct mlx4_en_priv *priv = netdev_priv(dev);
399 struct mlx4_en_dev *mdev = priv->mdev;
400
401 if (netif_msg_timer(priv))
402 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
403
404 priv->port_stats.tx_timeout++;
405 en_dbg(DRV, priv, "Scheduling watchdog\n");
406 queue_work(mdev->workqueue, &priv->watchdog_task);
407 }
408
409
410 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
411 {
412 struct mlx4_en_priv *priv = netdev_priv(dev);
413
414 spin_lock_bh(&priv->stats_lock);
415 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
416 spin_unlock_bh(&priv->stats_lock);
417
418 return &priv->ret_stats;
419 }
420
421 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
422 {
423 struct mlx4_en_cq *cq;
424 int i;
425
426 /* If we haven't received a specific coalescing setting
427 * (module param), we set the moderation parameters as follows:
428 * - moder_cnt is set to the number of mtu sized packets to
429 * satisfy our coelsing target.
430 * - moder_time is set to a fixed value.
431 */
432 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
433 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
434 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
435 "rx_frames:%d rx_usecs:%d\n",
436 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
437
438 /* Setup cq moderation params */
439 for (i = 0; i < priv->rx_ring_num; i++) {
440 cq = &priv->rx_cq[i];
441 cq->moder_cnt = priv->rx_frames;
442 cq->moder_time = priv->rx_usecs;
443 }
444
445 for (i = 0; i < priv->tx_ring_num; i++) {
446 cq = &priv->tx_cq[i];
447 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
448 cq->moder_time = MLX4_EN_TX_COAL_TIME;
449 }
450
451 /* Reset auto-moderation params */
452 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
453 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
454 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
455 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
456 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
457 priv->adaptive_rx_coal = 1;
458 priv->last_moder_time = MLX4_EN_AUTO_CONF;
459 priv->last_moder_jiffies = 0;
460 priv->last_moder_packets = 0;
461 priv->last_moder_tx_packets = 0;
462 priv->last_moder_bytes = 0;
463 }
464
465 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
466 {
467 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
468 struct mlx4_en_cq *cq;
469 unsigned long packets;
470 unsigned long rate;
471 unsigned long avg_pkt_size;
472 unsigned long rx_packets;
473 unsigned long rx_bytes;
474 unsigned long tx_packets;
475 unsigned long tx_pkt_diff;
476 unsigned long rx_pkt_diff;
477 int moder_time;
478 int i, err;
479
480 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
481 return;
482
483 spin_lock_bh(&priv->stats_lock);
484 rx_packets = priv->stats.rx_packets;
485 rx_bytes = priv->stats.rx_bytes;
486 tx_packets = priv->stats.tx_packets;
487 spin_unlock_bh(&priv->stats_lock);
488
489 if (!priv->last_moder_jiffies || !period)
490 goto out;
491
492 tx_pkt_diff = ((unsigned long) (tx_packets -
493 priv->last_moder_tx_packets));
494 rx_pkt_diff = ((unsigned long) (rx_packets -
495 priv->last_moder_packets));
496 packets = max(tx_pkt_diff, rx_pkt_diff);
497 rate = packets * HZ / period;
498 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
499 priv->last_moder_bytes)) / packets : 0;
500
501 /* Apply auto-moderation only when packet rate exceeds a rate that
502 * it matters */
503 if (rate > MLX4_EN_RX_RATE_THRESH && avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
504 /* If tx and rx packet rates are not balanced, assume that
505 * traffic is mainly BW bound and apply maximum moderation.
506 * Otherwise, moderate according to packet rate */
507 if (2 * tx_pkt_diff > 3 * rx_pkt_diff ||
508 2 * rx_pkt_diff > 3 * tx_pkt_diff) {
509 moder_time = priv->rx_usecs_high;
510 } else {
511 if (rate < priv->pkt_rate_low)
512 moder_time = priv->rx_usecs_low;
513 else if (rate > priv->pkt_rate_high)
514 moder_time = priv->rx_usecs_high;
515 else
516 moder_time = (rate - priv->pkt_rate_low) *
517 (priv->rx_usecs_high - priv->rx_usecs_low) /
518 (priv->pkt_rate_high - priv->pkt_rate_low) +
519 priv->rx_usecs_low;
520 }
521 } else {
522 moder_time = priv->rx_usecs_low;
523 }
524
525 en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
526 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
527
528 en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
529 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
530 priv->last_moder_time, moder_time, period, packets,
531 avg_pkt_size, rate);
532
533 if (moder_time != priv->last_moder_time) {
534 priv->last_moder_time = moder_time;
535 for (i = 0; i < priv->rx_ring_num; i++) {
536 cq = &priv->rx_cq[i];
537 cq->moder_time = moder_time;
538 err = mlx4_en_set_cq_moder(priv, cq);
539 if (err) {
540 en_err(priv, "Failed modifying moderation for cq:%d\n", i);
541 break;
542 }
543 }
544 }
545
546 out:
547 priv->last_moder_packets = rx_packets;
548 priv->last_moder_tx_packets = tx_packets;
549 priv->last_moder_bytes = rx_bytes;
550 priv->last_moder_jiffies = jiffies;
551 }
552
553 static void mlx4_en_do_get_stats(struct work_struct *work)
554 {
555 struct delayed_work *delay = to_delayed_work(work);
556 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
557 stats_task);
558 struct mlx4_en_dev *mdev = priv->mdev;
559 int err;
560
561 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
562 if (err)
563 en_dbg(HW, priv, "Could not update stats\n");
564
565 mutex_lock(&mdev->state_lock);
566 if (mdev->device_up) {
567 if (priv->port_up)
568 mlx4_en_auto_moderation(priv);
569
570 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
571 }
572 if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
573 queue_work(mdev->workqueue, &priv->mac_task);
574 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
575 }
576 mutex_unlock(&mdev->state_lock);
577 }
578
579 static void mlx4_en_linkstate(struct work_struct *work)
580 {
581 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
582 linkstate_task);
583 struct mlx4_en_dev *mdev = priv->mdev;
584 int linkstate = priv->link_state;
585
586 mutex_lock(&mdev->state_lock);
587 /* If observable port state changed set carrier state and
588 * report to system log */
589 if (priv->last_link_state != linkstate) {
590 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
591 en_info(priv, "Link Down\n");
592 netif_carrier_off(priv->dev);
593 } else {
594 en_info(priv, "Link Up\n");
595 netif_carrier_on(priv->dev);
596 }
597 }
598 priv->last_link_state = linkstate;
599 mutex_unlock(&mdev->state_lock);
600 }
601
602
603 int mlx4_en_start_port(struct net_device *dev)
604 {
605 struct mlx4_en_priv *priv = netdev_priv(dev);
606 struct mlx4_en_dev *mdev = priv->mdev;
607 struct mlx4_en_cq *cq;
608 struct mlx4_en_tx_ring *tx_ring;
609 int rx_index = 0;
610 int tx_index = 0;
611 int err = 0;
612 int i;
613 int j;
614 u8 mc_list[16] = {0};
615 char name[32];
616
617 if (priv->port_up) {
618 en_dbg(DRV, priv, "start port called while port already up\n");
619 return 0;
620 }
621
622 /* Calculate Rx buf size */
623 dev->mtu = min(dev->mtu, priv->max_mtu);
624 mlx4_en_calc_rx_buf(dev);
625 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
626
627 /* Configure rx cq's and rings */
628 err = mlx4_en_activate_rx_rings(priv);
629 if (err) {
630 en_err(priv, "Failed to activate RX rings\n");
631 return err;
632 }
633 for (i = 0; i < priv->rx_ring_num; i++) {
634 cq = &priv->rx_cq[i];
635
636 err = mlx4_en_activate_cq(priv, cq);
637 if (err) {
638 en_err(priv, "Failed activating Rx CQ\n");
639 goto cq_err;
640 }
641 for (j = 0; j < cq->size; j++)
642 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
643 err = mlx4_en_set_cq_moder(priv, cq);
644 if (err) {
645 en_err(priv, "Failed setting cq moderation parameters");
646 mlx4_en_deactivate_cq(priv, cq);
647 goto cq_err;
648 }
649 mlx4_en_arm_cq(priv, cq);
650 priv->rx_ring[i].cqn = cq->mcq.cqn;
651 ++rx_index;
652 }
653
654 /* Set port mac number */
655 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
656 err = mlx4_register_mac(mdev->dev, priv->port,
657 priv->mac, &priv->base_qpn, 0);
658 if (err) {
659 en_err(priv, "Failed setting port mac\n");
660 goto cq_err;
661 }
662 mdev->mac_removed[priv->port] = 0;
663
664 err = mlx4_en_config_rss_steer(priv);
665 if (err) {
666 en_err(priv, "Failed configuring rss steering\n");
667 goto mac_err;
668 }
669
670 if (mdev->dev->caps.comp_pool && !priv->tx_vector) {
671 sprintf(name , "%s-tx", priv->dev->name);
672 if (mlx4_assign_eq(mdev->dev , name, &priv->tx_vector)) {
673 mlx4_warn(mdev, "Failed Assigning an EQ to "
674 "%s_tx ,Falling back to legacy "
675 "EQ's\n", priv->dev->name);
676 }
677 }
678 /* Configure tx cq's and rings */
679 for (i = 0; i < priv->tx_ring_num; i++) {
680 /* Configure cq */
681 cq = &priv->tx_cq[i];
682 cq->vector = priv->tx_vector;
683 err = mlx4_en_activate_cq(priv, cq);
684 if (err) {
685 en_err(priv, "Failed allocating Tx CQ\n");
686 goto tx_err;
687 }
688 err = mlx4_en_set_cq_moder(priv, cq);
689 if (err) {
690 en_err(priv, "Failed setting cq moderation parameters");
691 mlx4_en_deactivate_cq(priv, cq);
692 goto tx_err;
693 }
694 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
695 cq->buf->wqe_index = cpu_to_be16(0xffff);
696
697 /* Configure ring */
698 tx_ring = &priv->tx_ring[i];
699 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn);
700 if (err) {
701 en_err(priv, "Failed allocating Tx ring\n");
702 mlx4_en_deactivate_cq(priv, cq);
703 goto tx_err;
704 }
705 /* Set initial ownership of all Tx TXBBs to SW (1) */
706 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
707 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
708 ++tx_index;
709 }
710
711 /* Configure port */
712 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
713 priv->rx_skb_size + ETH_FCS_LEN,
714 priv->prof->tx_pause,
715 priv->prof->tx_ppp,
716 priv->prof->rx_pause,
717 priv->prof->rx_ppp);
718 if (err) {
719 en_err(priv, "Failed setting port general configurations "
720 "for port %d, with error %d\n", priv->port, err);
721 goto tx_err;
722 }
723 /* Set default qp number */
724 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
725 if (err) {
726 en_err(priv, "Failed setting default qp numbers\n");
727 goto tx_err;
728 }
729
730 /* Init port */
731 en_dbg(HW, priv, "Initializing port\n");
732 err = mlx4_INIT_PORT(mdev->dev, priv->port);
733 if (err) {
734 en_err(priv, "Failed Initializing port\n");
735 goto tx_err;
736 }
737
738 /* Attach rx QP to bradcast address */
739 memset(&mc_list[10], 0xff, ETH_ALEN);
740 mc_list[5] = priv->port;
741 if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
742 0, MLX4_PROT_ETH))
743 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
744
745 /* Must redo promiscuous mode setup. */
746 priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
747
748 /* Schedule multicast task to populate multicast list */
749 queue_work(mdev->workqueue, &priv->mcast_task);
750
751 priv->port_up = true;
752 netif_tx_start_all_queues(dev);
753 return 0;
754
755 tx_err:
756 while (tx_index--) {
757 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
758 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
759 }
760
761 mlx4_en_release_rss_steer(priv);
762 mac_err:
763 mlx4_unregister_mac(mdev->dev, priv->port, priv->base_qpn);
764 cq_err:
765 while (rx_index--)
766 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
767 for (i = 0; i < priv->rx_ring_num; i++)
768 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
769
770 return err; /* need to close devices */
771 }
772
773
774 void mlx4_en_stop_port(struct net_device *dev)
775 {
776 struct mlx4_en_priv *priv = netdev_priv(dev);
777 struct mlx4_en_dev *mdev = priv->mdev;
778 int i;
779 u8 mc_list[16] = {0};
780
781 if (!priv->port_up) {
782 en_dbg(DRV, priv, "stop port called while port already down\n");
783 return;
784 }
785
786 /* Synchronize with tx routine */
787 netif_tx_lock_bh(dev);
788 netif_tx_stop_all_queues(dev);
789 netif_tx_unlock_bh(dev);
790
791 /* Set port as not active */
792 priv->port_up = false;
793
794 /* Detach All multicasts */
795 memset(&mc_list[10], 0xff, ETH_ALEN);
796 mc_list[5] = priv->port;
797 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
798 MLX4_PROT_ETH);
799 for (i = 0; i < priv->mc_addrs_cnt; i++) {
800 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
801 mc_list[5] = priv->port;
802 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
803 mc_list, MLX4_PROT_ETH);
804 }
805 mlx4_en_clear_list(dev);
806 /* Flush multicast filter */
807 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
808
809 /* Unregister Mac address for the port */
810 mlx4_unregister_mac(mdev->dev, priv->port, priv->base_qpn);
811 mdev->mac_removed[priv->port] = 1;
812
813 /* Free TX Rings */
814 for (i = 0; i < priv->tx_ring_num; i++) {
815 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
816 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
817 }
818 msleep(10);
819
820 for (i = 0; i < priv->tx_ring_num; i++)
821 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
822
823 /* Free RSS qps */
824 mlx4_en_release_rss_steer(priv);
825
826 /* Free RX Rings */
827 for (i = 0; i < priv->rx_ring_num; i++) {
828 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
829 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
830 msleep(1);
831 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
832 }
833
834 /* close port*/
835 mlx4_CLOSE_PORT(mdev->dev, priv->port);
836 }
837
838 static void mlx4_en_restart(struct work_struct *work)
839 {
840 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
841 watchdog_task);
842 struct mlx4_en_dev *mdev = priv->mdev;
843 struct net_device *dev = priv->dev;
844
845 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
846
847 mutex_lock(&mdev->state_lock);
848 if (priv->port_up) {
849 mlx4_en_stop_port(dev);
850 if (mlx4_en_start_port(dev))
851 en_err(priv, "Failed restarting port %d\n", priv->port);
852 }
853 mutex_unlock(&mdev->state_lock);
854 }
855
856
857 static int mlx4_en_open(struct net_device *dev)
858 {
859 struct mlx4_en_priv *priv = netdev_priv(dev);
860 struct mlx4_en_dev *mdev = priv->mdev;
861 int i;
862 int err = 0;
863
864 mutex_lock(&mdev->state_lock);
865
866 if (!mdev->device_up) {
867 en_err(priv, "Cannot open - device down/disabled\n");
868 err = -EBUSY;
869 goto out;
870 }
871
872 /* Reset HW statistics and performance counters */
873 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
874 en_dbg(HW, priv, "Failed dumping statistics\n");
875
876 memset(&priv->stats, 0, sizeof(priv->stats));
877 memset(&priv->pstats, 0, sizeof(priv->pstats));
878
879 for (i = 0; i < priv->tx_ring_num; i++) {
880 priv->tx_ring[i].bytes = 0;
881 priv->tx_ring[i].packets = 0;
882 }
883 for (i = 0; i < priv->rx_ring_num; i++) {
884 priv->rx_ring[i].bytes = 0;
885 priv->rx_ring[i].packets = 0;
886 }
887
888 err = mlx4_en_start_port(dev);
889 if (err)
890 en_err(priv, "Failed starting port:%d\n", priv->port);
891
892 out:
893 mutex_unlock(&mdev->state_lock);
894 return err;
895 }
896
897
898 static int mlx4_en_close(struct net_device *dev)
899 {
900 struct mlx4_en_priv *priv = netdev_priv(dev);
901 struct mlx4_en_dev *mdev = priv->mdev;
902
903 en_dbg(IFDOWN, priv, "Close port called\n");
904
905 mutex_lock(&mdev->state_lock);
906
907 mlx4_en_stop_port(dev);
908 netif_carrier_off(dev);
909
910 mutex_unlock(&mdev->state_lock);
911 return 0;
912 }
913
914 void mlx4_en_free_resources(struct mlx4_en_priv *priv, bool reserve_vectors)
915 {
916 int i;
917
918 for (i = 0; i < priv->tx_ring_num; i++) {
919 if (priv->tx_ring[i].tx_info)
920 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
921 if (priv->tx_cq[i].buf)
922 mlx4_en_destroy_cq(priv, &priv->tx_cq[i], reserve_vectors);
923 }
924
925 for (i = 0; i < priv->rx_ring_num; i++) {
926 if (priv->rx_ring[i].rx_info)
927 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
928 if (priv->rx_cq[i].buf)
929 mlx4_en_destroy_cq(priv, &priv->rx_cq[i], reserve_vectors);
930 }
931 }
932
933 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
934 {
935 struct mlx4_en_port_profile *prof = priv->prof;
936 int i;
937 int base_tx_qpn, err;
938
939 err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &base_tx_qpn);
940 if (err) {
941 en_err(priv, "failed reserving range for TX rings\n");
942 return err;
943 }
944
945 /* Create tx Rings */
946 for (i = 0; i < priv->tx_ring_num; i++) {
947 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
948 prof->tx_ring_size, i, TX))
949 goto err;
950
951 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], base_tx_qpn + i,
952 prof->tx_ring_size, TXBB_SIZE))
953 goto err;
954 }
955
956 /* Create rx Rings */
957 for (i = 0; i < priv->rx_ring_num; i++) {
958 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
959 prof->rx_ring_size, i, RX))
960 goto err;
961
962 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
963 prof->rx_ring_size, priv->stride))
964 goto err;
965 }
966
967 return 0;
968
969 err:
970 en_err(priv, "Failed to allocate NIC resources\n");
971 mlx4_qp_release_range(priv->mdev->dev, base_tx_qpn, priv->tx_ring_num);
972 return -ENOMEM;
973 }
974
975
976 void mlx4_en_destroy_netdev(struct net_device *dev)
977 {
978 struct mlx4_en_priv *priv = netdev_priv(dev);
979 struct mlx4_en_dev *mdev = priv->mdev;
980
981 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
982
983 /* Unregister device - this will close the port if it was up */
984 if (priv->registered)
985 unregister_netdev(dev);
986
987 if (priv->allocated)
988 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
989
990 cancel_delayed_work(&priv->stats_task);
991 /* flush any pending task for this netdev */
992 flush_workqueue(mdev->workqueue);
993
994 /* Detach the netdev so tasks would not attempt to access it */
995 mutex_lock(&mdev->state_lock);
996 mdev->pndev[priv->port] = NULL;
997 mutex_unlock(&mdev->state_lock);
998
999 mlx4_en_free_resources(priv, false);
1000 free_netdev(dev);
1001 }
1002
1003 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
1004 {
1005 struct mlx4_en_priv *priv = netdev_priv(dev);
1006 struct mlx4_en_dev *mdev = priv->mdev;
1007 int err = 0;
1008
1009 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
1010 dev->mtu, new_mtu);
1011
1012 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
1013 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
1014 return -EPERM;
1015 }
1016 dev->mtu = new_mtu;
1017
1018 if (netif_running(dev)) {
1019 mutex_lock(&mdev->state_lock);
1020 if (!mdev->device_up) {
1021 /* NIC is probably restarting - let watchdog task reset
1022 * the port */
1023 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
1024 } else {
1025 mlx4_en_stop_port(dev);
1026 err = mlx4_en_start_port(dev);
1027 if (err) {
1028 en_err(priv, "Failed restarting port:%d\n",
1029 priv->port);
1030 queue_work(mdev->workqueue, &priv->watchdog_task);
1031 }
1032 }
1033 mutex_unlock(&mdev->state_lock);
1034 }
1035 return 0;
1036 }
1037
1038 static const struct net_device_ops mlx4_netdev_ops = {
1039 .ndo_open = mlx4_en_open,
1040 .ndo_stop = mlx4_en_close,
1041 .ndo_start_xmit = mlx4_en_xmit,
1042 .ndo_select_queue = mlx4_en_select_queue,
1043 .ndo_get_stats = mlx4_en_get_stats,
1044 .ndo_set_multicast_list = mlx4_en_set_multicast,
1045 .ndo_set_mac_address = mlx4_en_set_mac,
1046 .ndo_validate_addr = eth_validate_addr,
1047 .ndo_change_mtu = mlx4_en_change_mtu,
1048 .ndo_tx_timeout = mlx4_en_tx_timeout,
1049 .ndo_vlan_rx_register = mlx4_en_vlan_rx_register,
1050 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
1051 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
1052 #ifdef CONFIG_NET_POLL_CONTROLLER
1053 .ndo_poll_controller = mlx4_en_netpoll,
1054 #endif
1055 };
1056
1057 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
1058 struct mlx4_en_port_profile *prof)
1059 {
1060 struct net_device *dev;
1061 struct mlx4_en_priv *priv;
1062 int i;
1063 int err;
1064
1065 dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1066 prof->tx_ring_num, prof->rx_ring_num);
1067 if (dev == NULL) {
1068 mlx4_err(mdev, "Net device allocation failed\n");
1069 return -ENOMEM;
1070 }
1071
1072 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1073 dev->dev_id = port - 1;
1074
1075 /*
1076 * Initialize driver private data
1077 */
1078
1079 priv = netdev_priv(dev);
1080 memset(priv, 0, sizeof(struct mlx4_en_priv));
1081 priv->dev = dev;
1082 priv->mdev = mdev;
1083 priv->prof = prof;
1084 priv->port = port;
1085 priv->port_up = false;
1086 priv->flags = prof->flags;
1087 priv->tx_ring_num = prof->tx_ring_num;
1088 priv->rx_ring_num = prof->rx_ring_num;
1089 priv->mac_index = -1;
1090 priv->msg_enable = MLX4_EN_MSG_LEVEL;
1091 spin_lock_init(&priv->stats_lock);
1092 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1093 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1094 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1095 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1096 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1097
1098 /* Query for default mac and max mtu */
1099 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1100 priv->mac = mdev->dev->caps.def_mac[priv->port];
1101 if (ILLEGAL_MAC(priv->mac)) {
1102 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1103 priv->port, priv->mac);
1104 err = -EINVAL;
1105 goto out;
1106 }
1107
1108 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1109 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1110 err = mlx4_en_alloc_resources(priv);
1111 if (err)
1112 goto out;
1113
1114 /* Allocate page for receive rings */
1115 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1116 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1117 if (err) {
1118 en_err(priv, "Failed to allocate page for rx qps\n");
1119 goto out;
1120 }
1121 priv->allocated = 1;
1122
1123 /*
1124 * Initialize netdev entry points
1125 */
1126 dev->netdev_ops = &mlx4_netdev_ops;
1127 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1128 netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1129 netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1130
1131 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1132
1133 /* Set defualt MAC */
1134 dev->addr_len = ETH_ALEN;
1135 for (i = 0; i < ETH_ALEN; i++) {
1136 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1137 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1138 }
1139
1140 /*
1141 * Set driver features
1142 */
1143 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1144 if (mdev->LSO_support)
1145 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1146
1147 dev->vlan_features = dev->hw_features;
1148
1149 dev->hw_features |= NETIF_F_RXCSUM;
1150 dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1151 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1152 NETIF_F_HW_VLAN_FILTER;
1153
1154 mdev->pndev[port] = dev;
1155
1156 netif_carrier_off(dev);
1157 err = register_netdev(dev);
1158 if (err) {
1159 en_err(priv, "Netdev registration failed for port %d\n", port);
1160 goto out;
1161 }
1162
1163 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1164 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1165
1166 /* Configure port */
1167 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1168 MLX4_EN_MIN_MTU,
1169 0, 0, 0, 0);
1170 if (err) {
1171 en_err(priv, "Failed setting port general configurations "
1172 "for port %d, with error %d\n", priv->port, err);
1173 goto out;
1174 }
1175
1176 /* Init port */
1177 en_warn(priv, "Initializing port\n");
1178 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1179 if (err) {
1180 en_err(priv, "Failed Initializing port\n");
1181 goto out;
1182 }
1183 priv->registered = 1;
1184 mlx4_en_set_default_moderation(priv);
1185 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1186 return 0;
1187
1188 out:
1189 mlx4_en_destroy_netdev(dev);
1190 return err;
1191 }
1192
Linux with added FPC-III support