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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / net / ethernet / mellanox / mlx4 / en_netdev.c
blob78d776bc355c747d37fafa77a90117daead68ec3
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 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
72 static 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
98 u64 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
110 static 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
125 static 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
146 static 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
154 static 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
175 static 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
185 static 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 }
349 out:
350 mutex_unlock(&mdev->state_lock);
351 }
352
353 #ifdef CONFIG_NET_POLL_CONTROLLER
354 static 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
371 static 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
385 static 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
396 static 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 priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
419 priv->last_moder_packets[i] = 0;
420 priv->last_moder_bytes[i] = 0;
421 }
422
423 for (i = 0; i < priv->tx_ring_num; i++) {
424 cq = &priv->tx_cq[i];
425 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
426 cq->moder_time = MLX4_EN_TX_COAL_TIME;
427 }
428
429 /* Reset auto-moderation params */
430 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
431 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
432 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
433 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
434 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
435 priv->adaptive_rx_coal = 1;
436 priv->last_moder_jiffies = 0;
437 priv->last_moder_tx_packets = 0;
438 }
439
440 static 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 rx_pkt_diff;
450 int moder_time;
451 int ring, err;
452
453 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
454 return;
455
456 for (ring = 0; ring < priv->rx_ring_num; ring++) {
457 spin_lock_bh(&priv->stats_lock);
458 rx_packets = priv->rx_ring[ring].packets;
459 rx_bytes = priv->rx_ring[ring].bytes;
460 spin_unlock_bh(&priv->stats_lock);
461
462 rx_pkt_diff = ((unsigned long) (rx_packets -
463 priv->last_moder_packets[ring]));
464 packets = rx_pkt_diff;
465 rate = packets * HZ / period;
466 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
467 priv->last_moder_bytes[ring])) / packets : 0;
468
469 /* Apply auto-moderation only when packet rate
470 * exceeds a rate that it matters */
471 if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
472 avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
473 if (rate < priv->pkt_rate_low)
474 moder_time = priv->rx_usecs_low;
475 else if (rate > priv->pkt_rate_high)
476 moder_time = priv->rx_usecs_high;
477 else
478 moder_time = (rate - priv->pkt_rate_low) *
479 (priv->rx_usecs_high - priv->rx_usecs_low) /
480 (priv->pkt_rate_high - priv->pkt_rate_low) +
481 priv->rx_usecs_low;
482 } else {
483 moder_time = priv->rx_usecs_low;
484 }
485
486 if (moder_time != priv->last_moder_time[ring]) {
487 priv->last_moder_time[ring] = moder_time;
488 cq = &priv->rx_cq[ring];
489 cq->moder_time = moder_time;
490 err = mlx4_en_set_cq_moder(priv, cq);
491 if (err)
492 en_err(priv, "Failed modifying moderation "
493 "for cq:%d\n", ring);
494 }
495 priv->last_moder_packets[ring] = rx_packets;
496 priv->last_moder_bytes[ring] = rx_bytes;
497 }
498
499 priv->last_moder_jiffies = jiffies;
500 }
501
502 static void mlx4_en_do_get_stats(struct work_struct *work)
503 {
504 struct delayed_work *delay = to_delayed_work(work);
505 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
506 stats_task);
507 struct mlx4_en_dev *mdev = priv->mdev;
508 int err;
509
510 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
511 if (err)
512 en_dbg(HW, priv, "Could not update stats\n");
513
514 mutex_lock(&mdev->state_lock);
515 if (mdev->device_up) {
516 if (priv->port_up)
517 mlx4_en_auto_moderation(priv);
518
519 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
520 }
521 if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
522 queue_work(mdev->workqueue, &priv->mac_task);
523 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
524 }
525 mutex_unlock(&mdev->state_lock);
526 }
527
528 static void mlx4_en_linkstate(struct work_struct *work)
529 {
530 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
531 linkstate_task);
532 struct mlx4_en_dev *mdev = priv->mdev;
533 int linkstate = priv->link_state;
534
535 mutex_lock(&mdev->state_lock);
536 /* If observable port state changed set carrier state and
537 * report to system log */
538 if (priv->last_link_state != linkstate) {
539 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
540 en_info(priv, "Link Down\n");
541 netif_carrier_off(priv->dev);
542 } else {
543 en_info(priv, "Link Up\n");
544 netif_carrier_on(priv->dev);
545 }
546 }
547 priv->last_link_state = linkstate;
548 mutex_unlock(&mdev->state_lock);
549 }
550
551
552 int mlx4_en_start_port(struct net_device *dev)
553 {
554 struct mlx4_en_priv *priv = netdev_priv(dev);
555 struct mlx4_en_dev *mdev = priv->mdev;
556 struct mlx4_en_cq *cq;
557 struct mlx4_en_tx_ring *tx_ring;
558 int rx_index = 0;
559 int tx_index = 0;
560 int err = 0;
561 int i;
562 int j;
563 u8 mc_list[16] = {0};
564
565 if (priv->port_up) {
566 en_dbg(DRV, priv, "start port called while port already up\n");
567 return 0;
568 }
569
570 /* Calculate Rx buf size */
571 dev->mtu = min(dev->mtu, priv->max_mtu);
572 mlx4_en_calc_rx_buf(dev);
573 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
574
575 /* Configure rx cq's and rings */
576 err = mlx4_en_activate_rx_rings(priv);
577 if (err) {
578 en_err(priv, "Failed to activate RX rings\n");
579 return err;
580 }
581 for (i = 0; i < priv->rx_ring_num; i++) {
582 cq = &priv->rx_cq[i];
583
584 err = mlx4_en_activate_cq(priv, cq, i);
585 if (err) {
586 en_err(priv, "Failed activating Rx CQ\n");
587 goto cq_err;
588 }
589 for (j = 0; j < cq->size; j++)
590 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
591 err = mlx4_en_set_cq_moder(priv, cq);
592 if (err) {
593 en_err(priv, "Failed setting cq moderation parameters");
594 mlx4_en_deactivate_cq(priv, cq);
595 goto cq_err;
596 }
597 mlx4_en_arm_cq(priv, cq);
598 priv->rx_ring[i].cqn = cq->mcq.cqn;
599 ++rx_index;
600 }
601
602 /* Set port mac number */
603 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
604 err = mlx4_register_mac(mdev->dev, priv->port,
605 priv->mac, &priv->base_qpn, 0);
606 if (err) {
607 en_err(priv, "Failed setting port mac\n");
608 goto cq_err;
609 }
610 mdev->mac_removed[priv->port] = 0;
611
612 err = mlx4_en_config_rss_steer(priv);
613 if (err) {
614 en_err(priv, "Failed configuring rss steering\n");
615 goto mac_err;
616 }
617
618 /* Configure tx cq's and rings */
619 for (i = 0; i < priv->tx_ring_num; i++) {
620 /* Configure cq */
621 cq = &priv->tx_cq[i];
622 err = mlx4_en_activate_cq(priv, cq, i);
623 if (err) {
624 en_err(priv, "Failed allocating Tx CQ\n");
625 goto tx_err;
626 }
627 err = mlx4_en_set_cq_moder(priv, cq);
628 if (err) {
629 en_err(priv, "Failed setting cq moderation parameters");
630 mlx4_en_deactivate_cq(priv, cq);
631 goto tx_err;
632 }
633 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
634 cq->buf->wqe_index = cpu_to_be16(0xffff);
635
636 /* Configure ring */
637 tx_ring = &priv->tx_ring[i];
638 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn);
639 if (err) {
640 en_err(priv, "Failed allocating Tx ring\n");
641 mlx4_en_deactivate_cq(priv, cq);
642 goto tx_err;
643 }
644 /* Set initial ownership of all Tx TXBBs to SW (1) */
645 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
646 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
647 ++tx_index;
648 }
649
650 /* Configure port */
651 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
652 priv->rx_skb_size + ETH_FCS_LEN,
653 priv->prof->tx_pause,
654 priv->prof->tx_ppp,
655 priv->prof->rx_pause,
656 priv->prof->rx_ppp);
657 if (err) {
658 en_err(priv, "Failed setting port general configurations "
659 "for port %d, with error %d\n", priv->port, err);
660 goto tx_err;
661 }
662 /* Set default qp number */
663 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
664 if (err) {
665 en_err(priv, "Failed setting default qp numbers\n");
666 goto tx_err;
667 }
668
669 /* Init port */
670 en_dbg(HW, priv, "Initializing port\n");
671 err = mlx4_INIT_PORT(mdev->dev, priv->port);
672 if (err) {
673 en_err(priv, "Failed Initializing port\n");
674 goto tx_err;
675 }
676
677 /* Attach rx QP to bradcast address */
678 memset(&mc_list[10], 0xff, ETH_ALEN);
679 mc_list[5] = priv->port;
680 if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
681 0, MLX4_PROT_ETH))
682 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
683
684 /* Must redo promiscuous mode setup. */
685 priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
686
687 /* Schedule multicast task to populate multicast list */
688 queue_work(mdev->workqueue, &priv->mcast_task);
689
690 priv->port_up = true;
691 netif_tx_start_all_queues(dev);
692 return 0;
693
694 tx_err:
695 while (tx_index--) {
696 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
697 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
698 }
699
700 mlx4_en_release_rss_steer(priv);
701 mac_err:
702 mlx4_unregister_mac(mdev->dev, priv->port, priv->base_qpn);
703 cq_err:
704 while (rx_index--)
705 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
706 for (i = 0; i < priv->rx_ring_num; i++)
707 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
708
709 return err; /* need to close devices */
710 }
711
712
713 void mlx4_en_stop_port(struct net_device *dev)
714 {
715 struct mlx4_en_priv *priv = netdev_priv(dev);
716 struct mlx4_en_dev *mdev = priv->mdev;
717 int i;
718 u8 mc_list[16] = {0};
719
720 if (!priv->port_up) {
721 en_dbg(DRV, priv, "stop port called while port already down\n");
722 return;
723 }
724
725 /* Synchronize with tx routine */
726 netif_tx_lock_bh(dev);
727 netif_tx_stop_all_queues(dev);
728 netif_tx_unlock_bh(dev);
729
730 /* Set port as not active */
731 priv->port_up = false;
732
733 /* Detach All multicasts */
734 memset(&mc_list[10], 0xff, ETH_ALEN);
735 mc_list[5] = priv->port;
736 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
737 MLX4_PROT_ETH);
738 for (i = 0; i < priv->mc_addrs_cnt; i++) {
739 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
740 mc_list[5] = priv->port;
741 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
742 mc_list, MLX4_PROT_ETH);
743 }
744 mlx4_en_clear_list(dev);
745 /* Flush multicast filter */
746 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
747
748 /* Unregister Mac address for the port */
749 mlx4_unregister_mac(mdev->dev, priv->port, priv->base_qpn);
750 mdev->mac_removed[priv->port] = 1;
751
752 /* Free TX Rings */
753 for (i = 0; i < priv->tx_ring_num; i++) {
754 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
755 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
756 }
757 msleep(10);
758
759 for (i = 0; i < priv->tx_ring_num; i++)
760 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
761
762 /* Free RSS qps */
763 mlx4_en_release_rss_steer(priv);
764
765 /* Free RX Rings */
766 for (i = 0; i < priv->rx_ring_num; i++) {
767 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
768 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
769 msleep(1);
770 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
771 }
772
773 /* close port*/
774 mlx4_CLOSE_PORT(mdev->dev, priv->port);
775 }
776
777 static void mlx4_en_restart(struct work_struct *work)
778 {
779 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
780 watchdog_task);
781 struct mlx4_en_dev *mdev = priv->mdev;
782 struct net_device *dev = priv->dev;
783
784 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
785
786 mutex_lock(&mdev->state_lock);
787 if (priv->port_up) {
788 mlx4_en_stop_port(dev);
789 if (mlx4_en_start_port(dev))
790 en_err(priv, "Failed restarting port %d\n", priv->port);
791 }
792 mutex_unlock(&mdev->state_lock);
793 }
794
795
796 static int mlx4_en_open(struct net_device *dev)
797 {
798 struct mlx4_en_priv *priv = netdev_priv(dev);
799 struct mlx4_en_dev *mdev = priv->mdev;
800 int i;
801 int err = 0;
802
803 mutex_lock(&mdev->state_lock);
804
805 if (!mdev->device_up) {
806 en_err(priv, "Cannot open - device down/disabled\n");
807 err = -EBUSY;
808 goto out;
809 }
810
811 /* Reset HW statistics and performance counters */
812 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
813 en_dbg(HW, priv, "Failed dumping statistics\n");
814
815 memset(&priv->stats, 0, sizeof(priv->stats));
816 memset(&priv->pstats, 0, sizeof(priv->pstats));
817
818 for (i = 0; i < priv->tx_ring_num; i++) {
819 priv->tx_ring[i].bytes = 0;
820 priv->tx_ring[i].packets = 0;
821 }
822 for (i = 0; i < priv->rx_ring_num; i++) {
823 priv->rx_ring[i].bytes = 0;
824 priv->rx_ring[i].packets = 0;
825 }
826
827 err = mlx4_en_start_port(dev);
828 if (err)
829 en_err(priv, "Failed starting port:%d\n", priv->port);
830
831 out:
832 mutex_unlock(&mdev->state_lock);
833 return err;
834 }
835
836
837 static int mlx4_en_close(struct net_device *dev)
838 {
839 struct mlx4_en_priv *priv = netdev_priv(dev);
840 struct mlx4_en_dev *mdev = priv->mdev;
841
842 en_dbg(IFDOWN, priv, "Close port called\n");
843
844 mutex_lock(&mdev->state_lock);
845
846 mlx4_en_stop_port(dev);
847 netif_carrier_off(dev);
848
849 mutex_unlock(&mdev->state_lock);
850 return 0;
851 }
852
853 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
854 {
855 int i;
856
857 for (i = 0; i < priv->tx_ring_num; i++) {
858 if (priv->tx_ring[i].tx_info)
859 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
860 if (priv->tx_cq[i].buf)
861 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
862 }
863
864 for (i = 0; i < priv->rx_ring_num; i++) {
865 if (priv->rx_ring[i].rx_info)
866 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
867 if (priv->rx_cq[i].buf)
868 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
869 }
870 }
871
872 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
873 {
874 struct mlx4_en_port_profile *prof = priv->prof;
875 int i;
876 int base_tx_qpn, err;
877
878 err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &base_tx_qpn);
879 if (err) {
880 en_err(priv, "failed reserving range for TX rings\n");
881 return err;
882 }
883
884 /* Create tx Rings */
885 for (i = 0; i < priv->tx_ring_num; i++) {
886 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
887 prof->tx_ring_size, i, TX))
888 goto err;
889
890 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], base_tx_qpn + i,
891 prof->tx_ring_size, TXBB_SIZE))
892 goto err;
893 }
894
895 /* Create rx Rings */
896 for (i = 0; i < priv->rx_ring_num; i++) {
897 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
898 prof->rx_ring_size, i, RX))
899 goto err;
900
901 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
902 prof->rx_ring_size, priv->stride))
903 goto err;
904 }
905
906 return 0;
907
908 err:
909 en_err(priv, "Failed to allocate NIC resources\n");
910 mlx4_qp_release_range(priv->mdev->dev, base_tx_qpn, priv->tx_ring_num);
911 return -ENOMEM;
912 }
913
914
915 void mlx4_en_destroy_netdev(struct net_device *dev)
916 {
917 struct mlx4_en_priv *priv = netdev_priv(dev);
918 struct mlx4_en_dev *mdev = priv->mdev;
919
920 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
921
922 /* Unregister device - this will close the port if it was up */
923 if (priv->registered)
924 unregister_netdev(dev);
925
926 if (priv->allocated)
927 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
928
929 cancel_delayed_work(&priv->stats_task);
930 /* flush any pending task for this netdev */
931 flush_workqueue(mdev->workqueue);
932
933 /* Detach the netdev so tasks would not attempt to access it */
934 mutex_lock(&mdev->state_lock);
935 mdev->pndev[priv->port] = NULL;
936 mutex_unlock(&mdev->state_lock);
937
938 mlx4_en_free_resources(priv);
939 free_netdev(dev);
940 }
941
942 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
943 {
944 struct mlx4_en_priv *priv = netdev_priv(dev);
945 struct mlx4_en_dev *mdev = priv->mdev;
946 int err = 0;
947
948 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
949 dev->mtu, new_mtu);
950
951 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
952 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
953 return -EPERM;
954 }
955 dev->mtu = new_mtu;
956
957 if (netif_running(dev)) {
958 mutex_lock(&mdev->state_lock);
959 if (!mdev->device_up) {
960 /* NIC is probably restarting - let watchdog task reset
961 * the port */
962 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
963 } else {
964 mlx4_en_stop_port(dev);
965 err = mlx4_en_start_port(dev);
966 if (err) {
967 en_err(priv, "Failed restarting port:%d\n",
968 priv->port);
969 queue_work(mdev->workqueue, &priv->watchdog_task);
970 }
971 }
972 mutex_unlock(&mdev->state_lock);
973 }
974 return 0;
975 }
976
977 static const struct net_device_ops mlx4_netdev_ops = {
978 .ndo_open = mlx4_en_open,
979 .ndo_stop = mlx4_en_close,
980 .ndo_start_xmit = mlx4_en_xmit,
981 .ndo_select_queue = mlx4_en_select_queue,
982 .ndo_get_stats = mlx4_en_get_stats,
983 .ndo_set_rx_mode = mlx4_en_set_multicast,
984 .ndo_set_mac_address = mlx4_en_set_mac,
985 .ndo_validate_addr = eth_validate_addr,
986 .ndo_change_mtu = mlx4_en_change_mtu,
987 .ndo_tx_timeout = mlx4_en_tx_timeout,
988 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
989 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
990 #ifdef CONFIG_NET_POLL_CONTROLLER
991 .ndo_poll_controller = mlx4_en_netpoll,
992 #endif
993 };
994
995 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
996 struct mlx4_en_port_profile *prof)
997 {
998 struct net_device *dev;
999 struct mlx4_en_priv *priv;
1000 int i;
1001 int err;
1002
1003 dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1004 prof->tx_ring_num, prof->rx_ring_num);
1005 if (dev == NULL) {
1006 mlx4_err(mdev, "Net device allocation failed\n");
1007 return -ENOMEM;
1008 }
1009
1010 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1011 dev->dev_id = port - 1;
1012
1013 /*
1014 * Initialize driver private data
1015 */
1016
1017 priv = netdev_priv(dev);
1018 memset(priv, 0, sizeof(struct mlx4_en_priv));
1019 priv->dev = dev;
1020 priv->mdev = mdev;
1021 priv->prof = prof;
1022 priv->port = port;
1023 priv->port_up = false;
1024 priv->flags = prof->flags;
1025 priv->tx_ring_num = prof->tx_ring_num;
1026 priv->rx_ring_num = prof->rx_ring_num;
1027 priv->mac_index = -1;
1028 priv->msg_enable = MLX4_EN_MSG_LEVEL;
1029 spin_lock_init(&priv->stats_lock);
1030 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1031 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1032 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1033 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1034 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1035
1036 /* Query for default mac and max mtu */
1037 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1038 priv->mac = mdev->dev->caps.def_mac[priv->port];
1039 if (ILLEGAL_MAC(priv->mac)) {
1040 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1041 priv->port, priv->mac);
1042 err = -EINVAL;
1043 goto out;
1044 }
1045
1046 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1047 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1048 err = mlx4_en_alloc_resources(priv);
1049 if (err)
1050 goto out;
1051
1052 /* Allocate page for receive rings */
1053 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1054 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1055 if (err) {
1056 en_err(priv, "Failed to allocate page for rx qps\n");
1057 goto out;
1058 }
1059 priv->allocated = 1;
1060
1061 /*
1062 * Initialize netdev entry points
1063 */
1064 dev->netdev_ops = &mlx4_netdev_ops;
1065 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1066 netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1067 netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1068
1069 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1070
1071 /* Set defualt MAC */
1072 dev->addr_len = ETH_ALEN;
1073 for (i = 0; i < ETH_ALEN; i++) {
1074 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1075 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1076 }
1077
1078 /*
1079 * Set driver features
1080 */
1081 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1082 if (mdev->LSO_support)
1083 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1084
1085 dev->vlan_features = dev->hw_features;
1086
1087 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
1088 dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1089 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1090 NETIF_F_HW_VLAN_FILTER;
1091
1092 mdev->pndev[port] = dev;
1093
1094 netif_carrier_off(dev);
1095 err = register_netdev(dev);
1096 if (err) {
1097 en_err(priv, "Netdev registration failed for port %d\n", port);
1098 goto out;
1099 }
1100 priv->registered = 1;
1101
1102 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1103 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1104
1105 /* Configure port */
1106 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1107 MLX4_EN_MIN_MTU,
1108 0, 0, 0, 0);
1109 if (err) {
1110 en_err(priv, "Failed setting port general configurations "
1111 "for port %d, with error %d\n", priv->port, err);
1112 goto out;
1113 }
1114
1115 /* Init port */
1116 en_warn(priv, "Initializing port\n");
1117 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1118 if (err) {
1119 en_err(priv, "Failed Initializing port\n");
1120 goto out;
1121 }
1122 mlx4_en_set_default_moderation(priv);
1123 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1124 return 0;
1125
1126 out:
1127 mlx4_en_destroy_netdev(dev);
1128 return err;
1129 }
1130
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