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Linux 3.4.102
[linux/fpc-iii.git] / drivers / net / ethernet / mellanox / mlx4 / en_netdev.c
blob467a51171d4748d73ac809bf036a91643c8b2b08
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 static int 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 return 0;
71 }
72
73 static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
74 {
75 struct mlx4_en_priv *priv = netdev_priv(dev);
76 struct mlx4_en_dev *mdev = priv->mdev;
77 int err;
78 int idx;
79
80 en_dbg(HW, priv, "Killing VID:%d\n", vid);
81
82 clear_bit(vid, priv->active_vlans);
83
84 /* Remove VID from port VLAN filter */
85 mutex_lock(&mdev->state_lock);
86 if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
87 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
88 else
89 en_err(priv, "could not find vid %d in cache\n", vid);
90
91 if (mdev->device_up && priv->port_up) {
92 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
93 if (err)
94 en_err(priv, "Failed configuring VLAN filter\n");
95 }
96 mutex_unlock(&mdev->state_lock);
97
98 return 0;
99 }
100
101 u64 mlx4_en_mac_to_u64(u8 *addr)
102 {
103 u64 mac = 0;
104 int i;
105
106 for (i = 0; i < ETH_ALEN; i++) {
107 mac <<= 8;
108 mac |= addr[i];
109 }
110 return mac;
111 }
112
113 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
114 {
115 struct mlx4_en_priv *priv = netdev_priv(dev);
116 struct mlx4_en_dev *mdev = priv->mdev;
117 struct sockaddr *saddr = addr;
118
119 if (!is_valid_ether_addr(saddr->sa_data))
120 return -EADDRNOTAVAIL;
121
122 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
123 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
124 queue_work(mdev->workqueue, &priv->mac_task);
125 return 0;
126 }
127
128 static void mlx4_en_do_set_mac(struct work_struct *work)
129 {
130 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
131 mac_task);
132 struct mlx4_en_dev *mdev = priv->mdev;
133 int err = 0;
134
135 mutex_lock(&mdev->state_lock);
136 if (priv->port_up) {
137 /* Remove old MAC and insert the new one */
138 err = mlx4_replace_mac(mdev->dev, priv->port,
139 priv->base_qpn, priv->mac);
140 if (err)
141 en_err(priv, "Failed changing HW MAC address\n");
142 } else
143 en_dbg(HW, priv, "Port is down while "
144 "registering mac, exiting...\n");
145
146 mutex_unlock(&mdev->state_lock);
147 }
148
149 static void mlx4_en_clear_list(struct net_device *dev)
150 {
151 struct mlx4_en_priv *priv = netdev_priv(dev);
152
153 kfree(priv->mc_addrs);
154 priv->mc_addrs = NULL;
155 priv->mc_addrs_cnt = 0;
156 }
157
158 static void mlx4_en_cache_mclist(struct net_device *dev)
159 {
160 struct mlx4_en_priv *priv = netdev_priv(dev);
161 struct netdev_hw_addr *ha;
162 char *mc_addrs;
163 int mc_addrs_cnt = netdev_mc_count(dev);
164 int i;
165
166 mc_addrs = kmalloc(mc_addrs_cnt * ETH_ALEN, GFP_ATOMIC);
167 if (!mc_addrs) {
168 en_err(priv, "failed to allocate multicast list\n");
169 return;
170 }
171 i = 0;
172 netdev_for_each_mc_addr(ha, dev)
173 memcpy(mc_addrs + i++ * ETH_ALEN, ha->addr, ETH_ALEN);
174 mlx4_en_clear_list(dev);
175 priv->mc_addrs = mc_addrs;
176 priv->mc_addrs_cnt = mc_addrs_cnt;
177 }
178
179
180 static void mlx4_en_set_multicast(struct net_device *dev)
181 {
182 struct mlx4_en_priv *priv = netdev_priv(dev);
183
184 if (!priv->port_up)
185 return;
186
187 queue_work(priv->mdev->workqueue, &priv->mcast_task);
188 }
189
190 static void mlx4_en_do_set_multicast(struct work_struct *work)
191 {
192 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
193 mcast_task);
194 struct mlx4_en_dev *mdev = priv->mdev;
195 struct net_device *dev = priv->dev;
196 u64 mcast_addr = 0;
197 u8 mc_list[16] = {0};
198 int err;
199
200 mutex_lock(&mdev->state_lock);
201 if (!mdev->device_up) {
202 en_dbg(HW, priv, "Card is not up, "
203 "ignoring multicast change.\n");
204 goto out;
205 }
206 if (!priv->port_up) {
207 en_dbg(HW, priv, "Port is down, "
208 "ignoring multicast change.\n");
209 goto out;
210 }
211
212 if (!netif_carrier_ok(dev)) {
213 if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
214 if (priv->port_state.link_state) {
215 priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
216 netif_carrier_on(dev);
217 en_dbg(LINK, priv, "Link Up\n");
218 }
219 }
220 }
221
222 /*
223 * Promsicuous mode: disable all filters
224 */
225
226 if (dev->flags & IFF_PROMISC) {
227 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
228 if (netif_msg_rx_status(priv))
229 en_warn(priv, "Entering promiscuous mode\n");
230 priv->flags |= MLX4_EN_FLAG_PROMISC;
231
232 /* Enable promiscouos mode */
233 if (!(mdev->dev->caps.flags &
234 MLX4_DEV_CAP_FLAG_VEP_UC_STEER))
235 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
236 priv->base_qpn, 1);
237 else
238 err = mlx4_unicast_promisc_add(mdev->dev, priv->base_qpn,
239 priv->port);
240 if (err)
241 en_err(priv, "Failed enabling "
242 "promiscuous mode\n");
243
244 /* Disable port multicast filter (unconditionally) */
245 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
246 0, MLX4_MCAST_DISABLE);
247 if (err)
248 en_err(priv, "Failed disabling "
249 "multicast filter\n");
250
251 /* Add the default qp number as multicast promisc */
252 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
253 err = mlx4_multicast_promisc_add(mdev->dev, priv->base_qpn,
254 priv->port);
255 if (err)
256 en_err(priv, "Failed entering multicast promisc mode\n");
257 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
258 }
259
260 /* Disable port VLAN filter */
261 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
262 if (err)
263 en_err(priv, "Failed disabling VLAN filter\n");
264 }
265 goto out;
266 }
267
268 /*
269 * Not in promiscuous mode
270 */
271
272 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
273 if (netif_msg_rx_status(priv))
274 en_warn(priv, "Leaving promiscuous mode\n");
275 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
276
277 /* Disable promiscouos mode */
278 if (!(mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))
279 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
280 priv->base_qpn, 0);
281 else
282 err = mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
283 priv->port);
284 if (err)
285 en_err(priv, "Failed disabling promiscuous mode\n");
286
287 /* Disable Multicast promisc */
288 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
289 err = mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
290 priv->port);
291 if (err)
292 en_err(priv, "Failed disabling multicast promiscuous mode\n");
293 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
294 }
295
296 /* Enable port VLAN filter */
297 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
298 if (err)
299 en_err(priv, "Failed enabling VLAN filter\n");
300 }
301
302 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
303 if (dev->flags & IFF_ALLMULTI) {
304 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
305 0, MLX4_MCAST_DISABLE);
306 if (err)
307 en_err(priv, "Failed disabling multicast filter\n");
308
309 /* Add the default qp number as multicast promisc */
310 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
311 err = mlx4_multicast_promisc_add(mdev->dev, priv->base_qpn,
312 priv->port);
313 if (err)
314 en_err(priv, "Failed entering multicast promisc mode\n");
315 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
316 }
317 } else {
318 int i;
319 /* Disable Multicast promisc */
320 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
321 err = mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
322 priv->port);
323 if (err)
324 en_err(priv, "Failed disabling multicast promiscuous mode\n");
325 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
326 }
327
328 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
329 0, MLX4_MCAST_DISABLE);
330 if (err)
331 en_err(priv, "Failed disabling multicast filter\n");
332
333 /* Detach our qp from all the multicast addresses */
334 for (i = 0; i < priv->mc_addrs_cnt; i++) {
335 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
336 mc_list[5] = priv->port;
337 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
338 mc_list, MLX4_PROT_ETH);
339 }
340 /* Flush mcast filter and init it with broadcast address */
341 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
342 1, MLX4_MCAST_CONFIG);
343
344 /* Update multicast list - we cache all addresses so they won't
345 * change while HW is updated holding the command semaphor */
346 netif_tx_lock_bh(dev);
347 mlx4_en_cache_mclist(dev);
348 netif_tx_unlock_bh(dev);
349 for (i = 0; i < priv->mc_addrs_cnt; i++) {
350 mcast_addr =
351 mlx4_en_mac_to_u64(priv->mc_addrs + i * ETH_ALEN);
352 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
353 mc_list[5] = priv->port;
354 mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp,
355 mc_list, 0, MLX4_PROT_ETH);
356 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
357 mcast_addr, 0, MLX4_MCAST_CONFIG);
358 }
359 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
360 0, MLX4_MCAST_ENABLE);
361 if (err)
362 en_err(priv, "Failed enabling multicast filter\n");
363 }
364 out:
365 mutex_unlock(&mdev->state_lock);
366 }
367
368 #ifdef CONFIG_NET_POLL_CONTROLLER
369 static void mlx4_en_netpoll(struct net_device *dev)
370 {
371 struct mlx4_en_priv *priv = netdev_priv(dev);
372 struct mlx4_en_cq *cq;
373 int i;
374
375 for (i = 0; i < priv->rx_ring_num; i++) {
376 cq = &priv->rx_cq[i];
377 napi_schedule(&cq->napi);
378 }
379 }
380 #endif
381
382 static void mlx4_en_tx_timeout(struct net_device *dev)
383 {
384 struct mlx4_en_priv *priv = netdev_priv(dev);
385 struct mlx4_en_dev *mdev = priv->mdev;
386
387 if (netif_msg_timer(priv))
388 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
389
390 priv->port_stats.tx_timeout++;
391 en_dbg(DRV, priv, "Scheduling watchdog\n");
392 queue_work(mdev->workqueue, &priv->watchdog_task);
393 }
394
395
396 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
397 {
398 struct mlx4_en_priv *priv = netdev_priv(dev);
399
400 spin_lock_bh(&priv->stats_lock);
401 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
402 spin_unlock_bh(&priv->stats_lock);
403
404 return &priv->ret_stats;
405 }
406
407 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
408 {
409 struct mlx4_en_cq *cq;
410 int i;
411
412 /* If we haven't received a specific coalescing setting
413 * (module param), we set the moderation parameters as follows:
414 * - moder_cnt is set to the number of mtu sized packets to
415 * satisfy our coelsing target.
416 * - moder_time is set to a fixed value.
417 */
418 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
419 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
420 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
421 "rx_frames:%d rx_usecs:%d\n",
422 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
423
424 /* Setup cq moderation params */
425 for (i = 0; i < priv->rx_ring_num; i++) {
426 cq = &priv->rx_cq[i];
427 cq->moder_cnt = priv->rx_frames;
428 cq->moder_time = priv->rx_usecs;
429 priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
430 priv->last_moder_packets[i] = 0;
431 priv->last_moder_bytes[i] = 0;
432 }
433
434 for (i = 0; i < priv->tx_ring_num; i++) {
435 cq = &priv->tx_cq[i];
436 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
437 cq->moder_time = MLX4_EN_TX_COAL_TIME;
438 }
439
440 /* Reset auto-moderation params */
441 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
442 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
443 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
444 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
445 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
446 priv->adaptive_rx_coal = 1;
447 priv->last_moder_jiffies = 0;
448 priv->last_moder_tx_packets = 0;
449 }
450
451 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
452 {
453 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
454 struct mlx4_en_cq *cq;
455 unsigned long packets;
456 unsigned long rate;
457 unsigned long avg_pkt_size;
458 unsigned long rx_packets;
459 unsigned long rx_bytes;
460 unsigned long rx_pkt_diff;
461 int moder_time;
462 int ring, err;
463
464 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
465 return;
466
467 for (ring = 0; ring < priv->rx_ring_num; ring++) {
468 spin_lock_bh(&priv->stats_lock);
469 rx_packets = priv->rx_ring[ring].packets;
470 rx_bytes = priv->rx_ring[ring].bytes;
471 spin_unlock_bh(&priv->stats_lock);
472
473 rx_pkt_diff = ((unsigned long) (rx_packets -
474 priv->last_moder_packets[ring]));
475 packets = rx_pkt_diff;
476 rate = packets * HZ / period;
477 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
478 priv->last_moder_bytes[ring])) / packets : 0;
479
480 /* Apply auto-moderation only when packet rate
481 * exceeds a rate that it matters */
482 if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
483 avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
484 if (rate < priv->pkt_rate_low)
485 moder_time = priv->rx_usecs_low;
486 else if (rate > priv->pkt_rate_high)
487 moder_time = priv->rx_usecs_high;
488 else
489 moder_time = (rate - priv->pkt_rate_low) *
490 (priv->rx_usecs_high - priv->rx_usecs_low) /
491 (priv->pkt_rate_high - priv->pkt_rate_low) +
492 priv->rx_usecs_low;
493 } else {
494 moder_time = priv->rx_usecs_low;
495 }
496
497 if (moder_time != priv->last_moder_time[ring]) {
498 priv->last_moder_time[ring] = moder_time;
499 cq = &priv->rx_cq[ring];
500 cq->moder_time = moder_time;
501 err = mlx4_en_set_cq_moder(priv, cq);
502 if (err)
503 en_err(priv, "Failed modifying moderation "
504 "for cq:%d\n", ring);
505 }
506 priv->last_moder_packets[ring] = rx_packets;
507 priv->last_moder_bytes[ring] = rx_bytes;
508 }
509
510 priv->last_moder_jiffies = jiffies;
511 }
512
513 static void mlx4_en_do_get_stats(struct work_struct *work)
514 {
515 struct delayed_work *delay = to_delayed_work(work);
516 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
517 stats_task);
518 struct mlx4_en_dev *mdev = priv->mdev;
519 int err;
520
521 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
522 if (err)
523 en_dbg(HW, priv, "Could not update stats\n");
524
525 mutex_lock(&mdev->state_lock);
526 if (mdev->device_up) {
527 if (priv->port_up)
528 mlx4_en_auto_moderation(priv);
529
530 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
531 }
532 if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
533 queue_work(mdev->workqueue, &priv->mac_task);
534 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
535 }
536 mutex_unlock(&mdev->state_lock);
537 }
538
539 static void mlx4_en_linkstate(struct work_struct *work)
540 {
541 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
542 linkstate_task);
543 struct mlx4_en_dev *mdev = priv->mdev;
544 int linkstate = priv->link_state;
545
546 mutex_lock(&mdev->state_lock);
547 /* If observable port state changed set carrier state and
548 * report to system log */
549 if (priv->last_link_state != linkstate) {
550 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
551 en_info(priv, "Link Down\n");
552 netif_carrier_off(priv->dev);
553 } else {
554 en_info(priv, "Link Up\n");
555 netif_carrier_on(priv->dev);
556 }
557 }
558 priv->last_link_state = linkstate;
559 mutex_unlock(&mdev->state_lock);
560 }
561
562
563 int mlx4_en_start_port(struct net_device *dev)
564 {
565 struct mlx4_en_priv *priv = netdev_priv(dev);
566 struct mlx4_en_dev *mdev = priv->mdev;
567 struct mlx4_en_cq *cq;
568 struct mlx4_en_tx_ring *tx_ring;
569 int rx_index = 0;
570 int tx_index = 0;
571 int err = 0;
572 int i;
573 int j;
574 u8 mc_list[16] = {0};
575
576 if (priv->port_up) {
577 en_dbg(DRV, priv, "start port called while port already up\n");
578 return 0;
579 }
580
581 /* Calculate Rx buf size */
582 dev->mtu = min(dev->mtu, priv->max_mtu);
583 mlx4_en_calc_rx_buf(dev);
584 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
585
586 /* Configure rx cq's and rings */
587 err = mlx4_en_activate_rx_rings(priv);
588 if (err) {
589 en_err(priv, "Failed to activate RX rings\n");
590 return err;
591 }
592 for (i = 0; i < priv->rx_ring_num; i++) {
593 cq = &priv->rx_cq[i];
594
595 err = mlx4_en_activate_cq(priv, cq, i);
596 if (err) {
597 en_err(priv, "Failed activating Rx CQ\n");
598 goto cq_err;
599 }
600 for (j = 0; j < cq->size; j++)
601 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
602 err = mlx4_en_set_cq_moder(priv, cq);
603 if (err) {
604 en_err(priv, "Failed setting cq moderation parameters");
605 mlx4_en_deactivate_cq(priv, cq);
606 goto cq_err;
607 }
608 mlx4_en_arm_cq(priv, cq);
609 priv->rx_ring[i].cqn = cq->mcq.cqn;
610 ++rx_index;
611 }
612
613 /* Set qp number */
614 en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
615 err = mlx4_get_eth_qp(mdev->dev, priv->port,
616 priv->mac, &priv->base_qpn);
617 if (err) {
618 en_err(priv, "Failed getting eth qp\n");
619 goto cq_err;
620 }
621 mdev->mac_removed[priv->port] = 0;
622
623 err = mlx4_en_config_rss_steer(priv);
624 if (err) {
625 en_err(priv, "Failed configuring rss steering\n");
626 goto mac_err;
627 }
628
629 /* Configure tx cq's and rings */
630 for (i = 0; i < priv->tx_ring_num; i++) {
631 /* Configure cq */
632 cq = &priv->tx_cq[i];
633 err = mlx4_en_activate_cq(priv, cq, i);
634 if (err) {
635 en_err(priv, "Failed allocating Tx CQ\n");
636 goto tx_err;
637 }
638 err = mlx4_en_set_cq_moder(priv, cq);
639 if (err) {
640 en_err(priv, "Failed setting cq moderation parameters");
641 mlx4_en_deactivate_cq(priv, cq);
642 goto tx_err;
643 }
644 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
645 cq->buf->wqe_index = cpu_to_be16(0xffff);
646
647 /* Configure ring */
648 tx_ring = &priv->tx_ring[i];
649 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn);
650 if (err) {
651 en_err(priv, "Failed allocating Tx ring\n");
652 mlx4_en_deactivate_cq(priv, cq);
653 goto tx_err;
654 }
655 /* Set initial ownership of all Tx TXBBs to SW (1) */
656 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
657 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
658 ++tx_index;
659 }
660
661 /* Configure port */
662 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
663 priv->rx_skb_size + ETH_FCS_LEN,
664 priv->prof->tx_pause,
665 priv->prof->tx_ppp,
666 priv->prof->rx_pause,
667 priv->prof->rx_ppp);
668 if (err) {
669 en_err(priv, "Failed setting port general configurations "
670 "for port %d, with error %d\n", priv->port, err);
671 goto tx_err;
672 }
673 /* Set default qp number */
674 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
675 if (err) {
676 en_err(priv, "Failed setting default qp numbers\n");
677 goto tx_err;
678 }
679
680 /* Init port */
681 en_dbg(HW, priv, "Initializing port\n");
682 err = mlx4_INIT_PORT(mdev->dev, priv->port);
683 if (err) {
684 en_err(priv, "Failed Initializing port\n");
685 goto tx_err;
686 }
687
688 /* Attach rx QP to bradcast address */
689 memset(&mc_list[10], 0xff, ETH_ALEN);
690 mc_list[5] = priv->port;
691 if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
692 0, MLX4_PROT_ETH))
693 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
694
695 /* Must redo promiscuous mode setup. */
696 priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
697
698 /* Schedule multicast task to populate multicast list */
699 queue_work(mdev->workqueue, &priv->mcast_task);
700
701 mlx4_set_stats_bitmap(mdev->dev, &priv->stats_bitmap);
702
703 priv->port_up = true;
704 netif_tx_start_all_queues(dev);
705 return 0;
706
707 tx_err:
708 while (tx_index--) {
709 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
710 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
711 }
712
713 mlx4_en_release_rss_steer(priv);
714 mac_err:
715 mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
716 cq_err:
717 while (rx_index--)
718 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
719 for (i = 0; i < priv->rx_ring_num; i++)
720 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
721
722 return err; /* need to close devices */
723 }
724
725
726 void mlx4_en_stop_port(struct net_device *dev)
727 {
728 struct mlx4_en_priv *priv = netdev_priv(dev);
729 struct mlx4_en_dev *mdev = priv->mdev;
730 int i;
731 u8 mc_list[16] = {0};
732
733 if (!priv->port_up) {
734 en_dbg(DRV, priv, "stop port called while port already down\n");
735 return;
736 }
737
738 /* Synchronize with tx routine */
739 netif_tx_lock_bh(dev);
740 netif_tx_stop_all_queues(dev);
741 netif_tx_unlock_bh(dev);
742
743 /* Set port as not active */
744 priv->port_up = false;
745
746 /* Detach All multicasts */
747 memset(&mc_list[10], 0xff, ETH_ALEN);
748 mc_list[5] = priv->port;
749 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
750 MLX4_PROT_ETH);
751 for (i = 0; i < priv->mc_addrs_cnt; i++) {
752 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
753 mc_list[5] = priv->port;
754 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
755 mc_list, MLX4_PROT_ETH);
756 }
757 mlx4_en_clear_list(dev);
758 /* Flush multicast filter */
759 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
760
761 /* Free TX Rings */
762 for (i = 0; i < priv->tx_ring_num; i++) {
763 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
764 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
765 }
766 msleep(10);
767
768 for (i = 0; i < priv->tx_ring_num; i++)
769 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
770
771 /* Free RSS qps */
772 mlx4_en_release_rss_steer(priv);
773
774 /* Unregister Mac address for the port */
775 mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
776 mdev->mac_removed[priv->port] = 1;
777
778 /* Free RX Rings */
779 for (i = 0; i < priv->rx_ring_num; i++) {
780 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
781 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
782 msleep(1);
783 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
784 }
785
786 /* close port*/
787 mlx4_CLOSE_PORT(mdev->dev, priv->port);
788 }
789
790 static void mlx4_en_restart(struct work_struct *work)
791 {
792 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
793 watchdog_task);
794 struct mlx4_en_dev *mdev = priv->mdev;
795 struct net_device *dev = priv->dev;
796
797 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
798
799 mutex_lock(&mdev->state_lock);
800 if (priv->port_up) {
801 mlx4_en_stop_port(dev);
802 if (mlx4_en_start_port(dev))
803 en_err(priv, "Failed restarting port %d\n", priv->port);
804 }
805 mutex_unlock(&mdev->state_lock);
806 }
807
808 static void mlx4_en_clear_stats(struct net_device *dev)
809 {
810 struct mlx4_en_priv *priv = netdev_priv(dev);
811 struct mlx4_en_dev *mdev = priv->mdev;
812 int i;
813
814 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
815 en_dbg(HW, priv, "Failed dumping statistics\n");
816
817 memset(&priv->stats, 0, sizeof(priv->stats));
818 memset(&priv->pstats, 0, sizeof(priv->pstats));
819 memset(&priv->pkstats, 0, sizeof(priv->pkstats));
820 memset(&priv->port_stats, 0, sizeof(priv->port_stats));
821
822 for (i = 0; i < priv->tx_ring_num; i++) {
823 priv->tx_ring[i].bytes = 0;
824 priv->tx_ring[i].packets = 0;
825 priv->tx_ring[i].tx_csum = 0;
826 }
827 for (i = 0; i < priv->rx_ring_num; i++) {
828 priv->rx_ring[i].bytes = 0;
829 priv->rx_ring[i].packets = 0;
830 priv->rx_ring[i].csum_ok = 0;
831 priv->rx_ring[i].csum_none = 0;
832 }
833 }
834
835 static int mlx4_en_open(struct net_device *dev)
836 {
837 struct mlx4_en_priv *priv = netdev_priv(dev);
838 struct mlx4_en_dev *mdev = priv->mdev;
839 int err = 0;
840
841 mutex_lock(&mdev->state_lock);
842
843 if (!mdev->device_up) {
844 en_err(priv, "Cannot open - device down/disabled\n");
845 err = -EBUSY;
846 goto out;
847 }
848
849 /* Reset HW statistics and SW counters */
850 mlx4_en_clear_stats(dev);
851
852 err = mlx4_en_start_port(dev);
853 if (err)
854 en_err(priv, "Failed starting port:%d\n", priv->port);
855
856 out:
857 mutex_unlock(&mdev->state_lock);
858 return err;
859 }
860
861
862 static int mlx4_en_close(struct net_device *dev)
863 {
864 struct mlx4_en_priv *priv = netdev_priv(dev);
865 struct mlx4_en_dev *mdev = priv->mdev;
866
867 en_dbg(IFDOWN, priv, "Close port called\n");
868
869 mutex_lock(&mdev->state_lock);
870
871 mlx4_en_stop_port(dev);
872 netif_carrier_off(dev);
873
874 mutex_unlock(&mdev->state_lock);
875 return 0;
876 }
877
878 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
879 {
880 int i;
881
882 for (i = 0; i < priv->tx_ring_num; i++) {
883 if (priv->tx_ring[i].tx_info)
884 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
885 if (priv->tx_cq[i].buf)
886 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
887 }
888
889 for (i = 0; i < priv->rx_ring_num; i++) {
890 if (priv->rx_ring[i].rx_info)
891 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
892 priv->prof->rx_ring_size, priv->stride);
893 if (priv->rx_cq[i].buf)
894 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
895 }
896 }
897
898 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
899 {
900 struct mlx4_en_port_profile *prof = priv->prof;
901 int i;
902 int base_tx_qpn, err;
903
904 err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &base_tx_qpn);
905 if (err) {
906 en_err(priv, "failed reserving range for TX rings\n");
907 return err;
908 }
909
910 /* Create tx Rings */
911 for (i = 0; i < priv->tx_ring_num; i++) {
912 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
913 prof->tx_ring_size, i, TX))
914 goto err;
915
916 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], base_tx_qpn + i,
917 prof->tx_ring_size, TXBB_SIZE))
918 goto err;
919 }
920
921 /* Create rx Rings */
922 for (i = 0; i < priv->rx_ring_num; i++) {
923 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
924 prof->rx_ring_size, i, RX))
925 goto err;
926
927 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
928 prof->rx_ring_size, priv->stride))
929 goto err;
930 }
931
932 return 0;
933
934 err:
935 en_err(priv, "Failed to allocate NIC resources\n");
936 mlx4_qp_release_range(priv->mdev->dev, base_tx_qpn, priv->tx_ring_num);
937 return -ENOMEM;
938 }
939
940
941 void mlx4_en_destroy_netdev(struct net_device *dev)
942 {
943 struct mlx4_en_priv *priv = netdev_priv(dev);
944 struct mlx4_en_dev *mdev = priv->mdev;
945
946 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
947
948 /* Unregister device - this will close the port if it was up */
949 if (priv->registered)
950 unregister_netdev(dev);
951
952 if (priv->allocated)
953 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
954
955 cancel_delayed_work(&priv->stats_task);
956 /* flush any pending task for this netdev */
957 flush_workqueue(mdev->workqueue);
958
959 /* Detach the netdev so tasks would not attempt to access it */
960 mutex_lock(&mdev->state_lock);
961 mdev->pndev[priv->port] = NULL;
962 mutex_unlock(&mdev->state_lock);
963
964 mlx4_en_free_resources(priv);
965 free_netdev(dev);
966 }
967
968 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
969 {
970 struct mlx4_en_priv *priv = netdev_priv(dev);
971 struct mlx4_en_dev *mdev = priv->mdev;
972 int err = 0;
973
974 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
975 dev->mtu, new_mtu);
976
977 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
978 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
979 return -EPERM;
980 }
981 dev->mtu = new_mtu;
982
983 if (netif_running(dev)) {
984 mutex_lock(&mdev->state_lock);
985 if (!mdev->device_up) {
986 /* NIC is probably restarting - let watchdog task reset
987 * the port */
988 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
989 } else {
990 mlx4_en_stop_port(dev);
991 err = mlx4_en_start_port(dev);
992 if (err) {
993 en_err(priv, "Failed restarting port:%d\n",
994 priv->port);
995 queue_work(mdev->workqueue, &priv->watchdog_task);
996 }
997 }
998 mutex_unlock(&mdev->state_lock);
999 }
1000 return 0;
1001 }
1002
1003 static int mlx4_en_set_features(struct net_device *netdev,
1004 netdev_features_t features)
1005 {
1006 struct mlx4_en_priv *priv = netdev_priv(netdev);
1007
1008 if (features & NETIF_F_LOOPBACK)
1009 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1010 else
1011 priv->ctrl_flags &=
1012 cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
1013
1014 return 0;
1015
1016 }
1017
1018 static const struct net_device_ops mlx4_netdev_ops = {
1019 .ndo_open = mlx4_en_open,
1020 .ndo_stop = mlx4_en_close,
1021 .ndo_start_xmit = mlx4_en_xmit,
1022 .ndo_select_queue = mlx4_en_select_queue,
1023 .ndo_get_stats = mlx4_en_get_stats,
1024 .ndo_set_rx_mode = mlx4_en_set_multicast,
1025 .ndo_set_mac_address = mlx4_en_set_mac,
1026 .ndo_validate_addr = eth_validate_addr,
1027 .ndo_change_mtu = mlx4_en_change_mtu,
1028 .ndo_tx_timeout = mlx4_en_tx_timeout,
1029 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
1030 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
1031 #ifdef CONFIG_NET_POLL_CONTROLLER
1032 .ndo_poll_controller = mlx4_en_netpoll,
1033 #endif
1034 .ndo_set_features = mlx4_en_set_features,
1035 };
1036
1037 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
1038 struct mlx4_en_port_profile *prof)
1039 {
1040 struct net_device *dev;
1041 struct mlx4_en_priv *priv;
1042 int i;
1043 int err;
1044
1045 dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1046 prof->tx_ring_num, prof->rx_ring_num);
1047 if (dev == NULL)
1048 return -ENOMEM;
1049
1050 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1051 dev->dev_id = port - 1;
1052
1053 /*
1054 * Initialize driver private data
1055 */
1056
1057 priv = netdev_priv(dev);
1058 memset(priv, 0, sizeof(struct mlx4_en_priv));
1059 priv->dev = dev;
1060 priv->mdev = mdev;
1061 priv->ddev = &mdev->pdev->dev;
1062 priv->prof = prof;
1063 priv->port = port;
1064 priv->port_up = false;
1065 priv->flags = prof->flags;
1066 priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
1067 MLX4_WQE_CTRL_SOLICITED);
1068 priv->tx_ring_num = prof->tx_ring_num;
1069 priv->rx_ring_num = prof->rx_ring_num;
1070 priv->mac_index = -1;
1071 priv->msg_enable = MLX4_EN_MSG_LEVEL;
1072 spin_lock_init(&priv->stats_lock);
1073 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1074 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1075 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1076 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1077 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1078
1079 /* Query for default mac and max mtu */
1080 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1081 priv->mac = mdev->dev->caps.def_mac[priv->port];
1082 if (ILLEGAL_MAC(priv->mac)) {
1083 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1084 priv->port, priv->mac);
1085 err = -EINVAL;
1086 goto out;
1087 }
1088
1089 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1090 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1091 err = mlx4_en_alloc_resources(priv);
1092 if (err)
1093 goto out;
1094
1095 /* Allocate page for receive rings */
1096 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1097 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1098 if (err) {
1099 en_err(priv, "Failed to allocate page for rx qps\n");
1100 goto out;
1101 }
1102 priv->allocated = 1;
1103
1104 /*
1105 * Initialize netdev entry points
1106 */
1107 dev->netdev_ops = &mlx4_netdev_ops;
1108 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1109 netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1110 netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1111
1112 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1113
1114 /* Set defualt MAC */
1115 dev->addr_len = ETH_ALEN;
1116 for (i = 0; i < ETH_ALEN; i++) {
1117 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1118 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1119 }
1120
1121 /*
1122 * Set driver features
1123 */
1124 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1125 if (mdev->LSO_support)
1126 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1127
1128 dev->vlan_features = dev->hw_features;
1129
1130 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
1131 dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1132 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1133 NETIF_F_HW_VLAN_FILTER;
1134 dev->hw_features |= NETIF_F_LOOPBACK;
1135
1136 mdev->pndev[port] = dev;
1137
1138 netif_carrier_off(dev);
1139 err = register_netdev(dev);
1140 if (err) {
1141 en_err(priv, "Netdev registration failed for port %d\n", port);
1142 goto out;
1143 }
1144 priv->registered = 1;
1145
1146 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1147 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1148
1149 /* Configure port */
1150 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1151 MLX4_EN_MIN_MTU,
1152 0, 0, 0, 0);
1153 if (err) {
1154 en_err(priv, "Failed setting port general configurations "
1155 "for port %d, with error %d\n", priv->port, err);
1156 goto out;
1157 }
1158
1159 /* Init port */
1160 en_warn(priv, "Initializing port\n");
1161 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1162 if (err) {
1163 en_err(priv, "Failed Initializing port\n");
1164 goto out;
1165 }
1166 mlx4_en_set_default_moderation(priv);
1167 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1168 return 0;
1169
1170 out:
1171 mlx4_en_destroy_netdev(dev);
1172 return err;
1173 }
1174
Linux with added FPC-III support