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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[deliverable/linux.git] / drivers / net / mlx4 / en_netdev.c
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
73 if (!priv->vlgrp)
74 return;
75
76 en_dbg(HW, priv, "adding VLAN:%d (vlgrp entry:%p)\n",
77 vid, vlan_group_get_device(priv->vlgrp, vid));
78
79 /* Add VID to port VLAN filter */
80 mutex_lock(&mdev->state_lock);
81 if (mdev->device_up && priv->port_up) {
82 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
83 if (err)
84 en_err(priv, "Failed configuring VLAN filter\n");
85 }
86 mutex_unlock(&mdev->state_lock);
87 }
88
89 static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
90 {
91 struct mlx4_en_priv *priv = netdev_priv(dev);
92 struct mlx4_en_dev *mdev = priv->mdev;
93 int err;
94
95 if (!priv->vlgrp)
96 return;
97
98 en_dbg(HW, priv, "Killing VID:%d (vlgrp:%p vlgrp entry:%p)\n",
99 vid, priv->vlgrp, vlan_group_get_device(priv->vlgrp, vid));
100 vlan_group_set_device(priv->vlgrp, vid, NULL);
101
102 /* Remove VID from port VLAN filter */
103 mutex_lock(&mdev->state_lock);
104 if (mdev->device_up && priv->port_up) {
105 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
106 if (err)
107 en_err(priv, "Failed configuring VLAN filter\n");
108 }
109 mutex_unlock(&mdev->state_lock);
110 }
111
112 static u64 mlx4_en_mac_to_u64(u8 *addr)
113 {
114 u64 mac = 0;
115 int i;
116
117 for (i = 0; i < ETH_ALEN; i++) {
118 mac <<= 8;
119 mac |= addr[i];
120 }
121 return mac;
122 }
123
124 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
125 {
126 struct mlx4_en_priv *priv = netdev_priv(dev);
127 struct mlx4_en_dev *mdev = priv->mdev;
128 struct sockaddr *saddr = addr;
129
130 if (!is_valid_ether_addr(saddr->sa_data))
131 return -EADDRNOTAVAIL;
132
133 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
134 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
135 queue_work(mdev->workqueue, &priv->mac_task);
136 return 0;
137 }
138
139 static void mlx4_en_do_set_mac(struct work_struct *work)
140 {
141 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
142 mac_task);
143 struct mlx4_en_dev *mdev = priv->mdev;
144 int err = 0;
145
146 mutex_lock(&mdev->state_lock);
147 if (priv->port_up) {
148 /* Remove old MAC and insert the new one */
149 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
150 err = mlx4_register_mac(mdev->dev, priv->port,
151 priv->mac, &priv->mac_index);
152 if (err)
153 en_err(priv, "Failed changing HW MAC address\n");
154 } else
155 en_dbg(HW, priv, "Port is down while "
156 "registering mac, exiting...\n");
157
158 mutex_unlock(&mdev->state_lock);
159 }
160
161 static void mlx4_en_clear_list(struct net_device *dev)
162 {
163 struct mlx4_en_priv *priv = netdev_priv(dev);
164
165 kfree(priv->mc_addrs);
166 priv->mc_addrs_cnt = 0;
167 }
168
169 static void mlx4_en_cache_mclist(struct net_device *dev)
170 {
171 struct mlx4_en_priv *priv = netdev_priv(dev);
172 struct netdev_hw_addr *ha;
173 char *mc_addrs;
174 int mc_addrs_cnt = netdev_mc_count(dev);
175 int i;
176
177 mc_addrs = kmalloc(mc_addrs_cnt * ETH_ALEN, GFP_ATOMIC);
178 if (!mc_addrs) {
179 en_err(priv, "failed to allocate multicast list\n");
180 return;
181 }
182 i = 0;
183 netdev_for_each_mc_addr(ha, dev)
184 memcpy(mc_addrs + i++ * ETH_ALEN, ha->addr, ETH_ALEN);
185 priv->mc_addrs = mc_addrs;
186 priv->mc_addrs_cnt = mc_addrs_cnt;
187 }
188
189
190 static void mlx4_en_set_multicast(struct net_device *dev)
191 {
192 struct mlx4_en_priv *priv = netdev_priv(dev);
193
194 if (!priv->port_up)
195 return;
196
197 queue_work(priv->mdev->workqueue, &priv->mcast_task);
198 }
199
200 static void mlx4_en_do_set_multicast(struct work_struct *work)
201 {
202 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
203 mcast_task);
204 struct mlx4_en_dev *mdev = priv->mdev;
205 struct net_device *dev = priv->dev;
206 u64 mcast_addr = 0;
207 int err;
208
209 mutex_lock(&mdev->state_lock);
210 if (!mdev->device_up) {
211 en_dbg(HW, priv, "Card is not up, "
212 "ignoring multicast change.\n");
213 goto out;
214 }
215 if (!priv->port_up) {
216 en_dbg(HW, priv, "Port is down, "
217 "ignoring multicast change.\n");
218 goto out;
219 }
220
221 /*
222 * Promsicuous mode: disable all filters
223 */
224
225 if (dev->flags & IFF_PROMISC) {
226 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
227 if (netif_msg_rx_status(priv))
228 en_warn(priv, "Entering promiscuous mode\n");
229 priv->flags |= MLX4_EN_FLAG_PROMISC;
230
231 /* Enable promiscouos mode */
232 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
233 priv->base_qpn, 1);
234 if (err)
235 en_err(priv, "Failed enabling "
236 "promiscous mode\n");
237
238 /* Disable port multicast filter (unconditionally) */
239 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
240 0, MLX4_MCAST_DISABLE);
241 if (err)
242 en_err(priv, "Failed disabling "
243 "multicast filter\n");
244
245 /* Disable port VLAN filter */
246 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
247 if (err)
248 en_err(priv, "Failed disabling VLAN filter\n");
249 }
250 goto out;
251 }
252
253 /*
254 * Not in promiscous 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 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
264 priv->base_qpn, 0);
265 if (err)
266 en_err(priv, "Failed disabling promiscous mode\n");
267
268 /* Enable port VLAN filter */
269 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
270 if (err)
271 en_err(priv, "Failed enabling VLAN filter\n");
272 }
273
274 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
275 if (dev->flags & IFF_ALLMULTI) {
276 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
277 0, MLX4_MCAST_DISABLE);
278 if (err)
279 en_err(priv, "Failed disabling multicast filter\n");
280 } else {
281 int i;
282
283 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
284 0, MLX4_MCAST_DISABLE);
285 if (err)
286 en_err(priv, "Failed disabling multicast filter\n");
287
288 /* Flush mcast filter and init it with broadcast address */
289 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
290 1, MLX4_MCAST_CONFIG);
291
292 /* Update multicast list - we cache all addresses so they won't
293 * change while HW is updated holding the command semaphor */
294 netif_tx_lock_bh(dev);
295 mlx4_en_cache_mclist(dev);
296 netif_tx_unlock_bh(dev);
297 for (i = 0; i < priv->mc_addrs_cnt; i++) {
298 mcast_addr =
299 mlx4_en_mac_to_u64(priv->mc_addrs + i * ETH_ALEN);
300 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
301 mcast_addr, 0, MLX4_MCAST_CONFIG);
302 }
303 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
304 0, MLX4_MCAST_ENABLE);
305 if (err)
306 en_err(priv, "Failed enabling multicast filter\n");
307
308 mlx4_en_clear_list(dev);
309 }
310 out:
311 mutex_unlock(&mdev->state_lock);
312 }
313
314 #ifdef CONFIG_NET_POLL_CONTROLLER
315 static void mlx4_en_netpoll(struct net_device *dev)
316 {
317 struct mlx4_en_priv *priv = netdev_priv(dev);
318 struct mlx4_en_cq *cq;
319 unsigned long flags;
320 int i;
321
322 for (i = 0; i < priv->rx_ring_num; i++) {
323 cq = &priv->rx_cq[i];
324 spin_lock_irqsave(&cq->lock, flags);
325 napi_synchronize(&cq->napi);
326 mlx4_en_process_rx_cq(dev, cq, 0);
327 spin_unlock_irqrestore(&cq->lock, flags);
328 }
329 }
330 #endif
331
332 static void mlx4_en_tx_timeout(struct net_device *dev)
333 {
334 struct mlx4_en_priv *priv = netdev_priv(dev);
335 struct mlx4_en_dev *mdev = priv->mdev;
336
337 if (netif_msg_timer(priv))
338 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
339
340 priv->port_stats.tx_timeout++;
341 en_dbg(DRV, priv, "Scheduling watchdog\n");
342 queue_work(mdev->workqueue, &priv->watchdog_task);
343 }
344
345
346 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
347 {
348 struct mlx4_en_priv *priv = netdev_priv(dev);
349
350 spin_lock_bh(&priv->stats_lock);
351 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
352 spin_unlock_bh(&priv->stats_lock);
353
354 return &priv->ret_stats;
355 }
356
357 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
358 {
359 struct mlx4_en_cq *cq;
360 int i;
361
362 /* If we haven't received a specific coalescing setting
363 * (module param), we set the moderation parameters as follows:
364 * - moder_cnt is set to the number of mtu sized packets to
365 * satisfy our coelsing target.
366 * - moder_time is set to a fixed value.
367 */
368 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
369 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
370 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
371 "rx_frames:%d rx_usecs:%d\n",
372 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
373
374 /* Setup cq moderation params */
375 for (i = 0; i < priv->rx_ring_num; i++) {
376 cq = &priv->rx_cq[i];
377 cq->moder_cnt = priv->rx_frames;
378 cq->moder_time = priv->rx_usecs;
379 }
380
381 for (i = 0; i < priv->tx_ring_num; i++) {
382 cq = &priv->tx_cq[i];
383 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
384 cq->moder_time = MLX4_EN_TX_COAL_TIME;
385 }
386
387 /* Reset auto-moderation params */
388 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
389 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
390 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
391 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
392 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
393 priv->adaptive_rx_coal = 1;
394 priv->last_moder_time = MLX4_EN_AUTO_CONF;
395 priv->last_moder_jiffies = 0;
396 priv->last_moder_packets = 0;
397 priv->last_moder_tx_packets = 0;
398 priv->last_moder_bytes = 0;
399 }
400
401 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
402 {
403 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
404 struct mlx4_en_cq *cq;
405 unsigned long packets;
406 unsigned long rate;
407 unsigned long avg_pkt_size;
408 unsigned long rx_packets;
409 unsigned long rx_bytes;
410 unsigned long rx_byte_diff;
411 unsigned long tx_packets;
412 unsigned long tx_pkt_diff;
413 unsigned long rx_pkt_diff;
414 int moder_time;
415 int i, err;
416
417 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
418 return;
419
420 spin_lock_bh(&priv->stats_lock);
421 rx_packets = priv->stats.rx_packets;
422 rx_bytes = priv->stats.rx_bytes;
423 tx_packets = priv->stats.tx_packets;
424 spin_unlock_bh(&priv->stats_lock);
425
426 if (!priv->last_moder_jiffies || !period)
427 goto out;
428
429 tx_pkt_diff = ((unsigned long) (tx_packets -
430 priv->last_moder_tx_packets));
431 rx_pkt_diff = ((unsigned long) (rx_packets -
432 priv->last_moder_packets));
433 packets = max(tx_pkt_diff, rx_pkt_diff);
434 rx_byte_diff = rx_bytes - priv->last_moder_bytes;
435 rx_byte_diff = rx_byte_diff ? rx_byte_diff : 1;
436 rate = packets * HZ / period;
437 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
438 priv->last_moder_bytes)) / packets : 0;
439
440 /* Apply auto-moderation only when packet rate exceeds a rate that
441 * it matters */
442 if (rate > MLX4_EN_RX_RATE_THRESH) {
443 /* If tx and rx packet rates are not balanced, assume that
444 * traffic is mainly BW bound and apply maximum moderation.
445 * Otherwise, moderate according to packet rate */
446 if (2 * tx_pkt_diff > 3 * rx_pkt_diff &&
447 rx_pkt_diff / rx_byte_diff <
448 MLX4_EN_SMALL_PKT_SIZE)
449 moder_time = priv->rx_usecs_low;
450 else if (2 * rx_pkt_diff > 3 * tx_pkt_diff)
451 moder_time = priv->rx_usecs_high;
452 else {
453 if (rate < priv->pkt_rate_low)
454 moder_time = priv->rx_usecs_low;
455 else if (rate > priv->pkt_rate_high)
456 moder_time = priv->rx_usecs_high;
457 else
458 moder_time = (rate - priv->pkt_rate_low) *
459 (priv->rx_usecs_high - priv->rx_usecs_low) /
460 (priv->pkt_rate_high - priv->pkt_rate_low) +
461 priv->rx_usecs_low;
462 }
463 } else {
464 /* When packet rate is low, use default moderation rather than
465 * 0 to prevent interrupt storms if traffic suddenly increases */
466 moder_time = priv->rx_usecs;
467 }
468
469 en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
470 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
471
472 en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
473 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
474 priv->last_moder_time, moder_time, period, packets,
475 avg_pkt_size, rate);
476
477 if (moder_time != priv->last_moder_time) {
478 priv->last_moder_time = moder_time;
479 for (i = 0; i < priv->rx_ring_num; i++) {
480 cq = &priv->rx_cq[i];
481 cq->moder_time = moder_time;
482 err = mlx4_en_set_cq_moder(priv, cq);
483 if (err) {
484 en_err(priv, "Failed modifying moderation for cq:%d\n", i);
485 break;
486 }
487 }
488 }
489
490 out:
491 priv->last_moder_packets = rx_packets;
492 priv->last_moder_tx_packets = tx_packets;
493 priv->last_moder_bytes = rx_bytes;
494 priv->last_moder_jiffies = jiffies;
495 }
496
497 static void mlx4_en_do_get_stats(struct work_struct *work)
498 {
499 struct delayed_work *delay = to_delayed_work(work);
500 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
501 stats_task);
502 struct mlx4_en_dev *mdev = priv->mdev;
503 int err;
504
505 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
506 if (err)
507 en_dbg(HW, priv, "Could not update stats\n");
508
509 mutex_lock(&mdev->state_lock);
510 if (mdev->device_up) {
511 if (priv->port_up)
512 mlx4_en_auto_moderation(priv);
513
514 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
515 }
516 mutex_unlock(&mdev->state_lock);
517 }
518
519 static void mlx4_en_linkstate(struct work_struct *work)
520 {
521 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
522 linkstate_task);
523 struct mlx4_en_dev *mdev = priv->mdev;
524 int linkstate = priv->link_state;
525
526 mutex_lock(&mdev->state_lock);
527 /* If observable port state changed set carrier state and
528 * report to system log */
529 if (priv->last_link_state != linkstate) {
530 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
531 en_dbg(LINK, priv, "Link Down\n");
532 netif_carrier_off(priv->dev);
533 } else {
534 en_dbg(LINK, priv, "Link Up\n");
535 netif_carrier_on(priv->dev);
536 }
537 }
538 priv->last_link_state = linkstate;
539 mutex_unlock(&mdev->state_lock);
540 }
541
542
543 int mlx4_en_start_port(struct net_device *dev)
544 {
545 struct mlx4_en_priv *priv = netdev_priv(dev);
546 struct mlx4_en_dev *mdev = priv->mdev;
547 struct mlx4_en_cq *cq;
548 struct mlx4_en_tx_ring *tx_ring;
549 int rx_index = 0;
550 int tx_index = 0;
551 int err = 0;
552 int i;
553 int j;
554
555 if (priv->port_up) {
556 en_dbg(DRV, priv, "start port called while port already up\n");
557 return 0;
558 }
559
560 /* Calculate Rx buf size */
561 dev->mtu = min(dev->mtu, priv->max_mtu);
562 mlx4_en_calc_rx_buf(dev);
563 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
564
565 /* Configure rx cq's and rings */
566 err = mlx4_en_activate_rx_rings(priv);
567 if (err) {
568 en_err(priv, "Failed to activate RX rings\n");
569 return err;
570 }
571 for (i = 0; i < priv->rx_ring_num; i++) {
572 cq = &priv->rx_cq[i];
573
574 err = mlx4_en_activate_cq(priv, cq);
575 if (err) {
576 en_err(priv, "Failed activating Rx CQ\n");
577 goto cq_err;
578 }
579 for (j = 0; j < cq->size; j++)
580 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
581 err = mlx4_en_set_cq_moder(priv, cq);
582 if (err) {
583 en_err(priv, "Failed setting cq moderation parameters");
584 mlx4_en_deactivate_cq(priv, cq);
585 goto cq_err;
586 }
587 mlx4_en_arm_cq(priv, cq);
588 priv->rx_ring[i].cqn = cq->mcq.cqn;
589 ++rx_index;
590 }
591
592 err = mlx4_en_config_rss_steer(priv);
593 if (err) {
594 en_err(priv, "Failed configuring rss steering\n");
595 goto cq_err;
596 }
597
598 /* Configure tx cq's and rings */
599 for (i = 0; i < priv->tx_ring_num; i++) {
600 /* Configure cq */
601 cq = &priv->tx_cq[i];
602 err = mlx4_en_activate_cq(priv, cq);
603 if (err) {
604 en_err(priv, "Failed allocating Tx CQ\n");
605 goto tx_err;
606 }
607 err = mlx4_en_set_cq_moder(priv, cq);
608 if (err) {
609 en_err(priv, "Failed setting cq moderation parameters");
610 mlx4_en_deactivate_cq(priv, cq);
611 goto tx_err;
612 }
613 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
614 cq->buf->wqe_index = cpu_to_be16(0xffff);
615
616 /* Configure ring */
617 tx_ring = &priv->tx_ring[i];
618 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn);
619 if (err) {
620 en_err(priv, "Failed allocating Tx ring\n");
621 mlx4_en_deactivate_cq(priv, cq);
622 goto tx_err;
623 }
624 /* Set initial ownership of all Tx TXBBs to SW (1) */
625 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
626 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
627 ++tx_index;
628 }
629
630 /* Configure port */
631 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
632 priv->rx_skb_size + ETH_FCS_LEN,
633 priv->prof->tx_pause,
634 priv->prof->tx_ppp,
635 priv->prof->rx_pause,
636 priv->prof->rx_ppp);
637 if (err) {
638 en_err(priv, "Failed setting port general configurations "
639 "for port %d, with error %d\n", priv->port, err);
640 goto tx_err;
641 }
642 /* Set default qp number */
643 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
644 if (err) {
645 en_err(priv, "Failed setting default qp numbers\n");
646 goto tx_err;
647 }
648 /* Set port mac number */
649 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
650 err = mlx4_register_mac(mdev->dev, priv->port,
651 priv->mac, &priv->mac_index);
652 if (err) {
653 en_err(priv, "Failed setting port mac\n");
654 goto tx_err;
655 }
656
657 /* Init port */
658 en_dbg(HW, priv, "Initializing port\n");
659 err = mlx4_INIT_PORT(mdev->dev, priv->port);
660 if (err) {
661 en_err(priv, "Failed Initializing port\n");
662 goto mac_err;
663 }
664
665 /* Schedule multicast task to populate multicast list */
666 queue_work(mdev->workqueue, &priv->mcast_task);
667
668 priv->port_up = true;
669 netif_tx_start_all_queues(dev);
670 return 0;
671
672 mac_err:
673 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
674 tx_err:
675 while (tx_index--) {
676 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
677 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
678 }
679
680 mlx4_en_release_rss_steer(priv);
681 cq_err:
682 while (rx_index--)
683 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
684 for (i = 0; i < priv->rx_ring_num; i++)
685 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
686
687 return err; /* need to close devices */
688 }
689
690
691 void mlx4_en_stop_port(struct net_device *dev)
692 {
693 struct mlx4_en_priv *priv = netdev_priv(dev);
694 struct mlx4_en_dev *mdev = priv->mdev;
695 int i;
696
697 if (!priv->port_up) {
698 en_dbg(DRV, priv, "stop port called while port already down\n");
699 return;
700 }
701
702 /* Synchronize with tx routine */
703 netif_tx_lock_bh(dev);
704 netif_tx_stop_all_queues(dev);
705 netif_tx_unlock_bh(dev);
706
707 /* close port*/
708 priv->port_up = false;
709 mlx4_CLOSE_PORT(mdev->dev, priv->port);
710
711 /* Unregister Mac address for the port */
712 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
713
714 /* Free TX Rings */
715 for (i = 0; i < priv->tx_ring_num; i++) {
716 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
717 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
718 }
719 msleep(10);
720
721 for (i = 0; i < priv->tx_ring_num; i++)
722 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
723
724 /* Free RSS qps */
725 mlx4_en_release_rss_steer(priv);
726
727 /* Free RX Rings */
728 for (i = 0; i < priv->rx_ring_num; i++) {
729 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
730 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
731 msleep(1);
732 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
733 }
734 }
735
736 static void mlx4_en_restart(struct work_struct *work)
737 {
738 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
739 watchdog_task);
740 struct mlx4_en_dev *mdev = priv->mdev;
741 struct net_device *dev = priv->dev;
742
743 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
744
745 mutex_lock(&mdev->state_lock);
746 if (priv->port_up) {
747 mlx4_en_stop_port(dev);
748 if (mlx4_en_start_port(dev))
749 en_err(priv, "Failed restarting port %d\n", priv->port);
750 }
751 mutex_unlock(&mdev->state_lock);
752 }
753
754
755 static int mlx4_en_open(struct net_device *dev)
756 {
757 struct mlx4_en_priv *priv = netdev_priv(dev);
758 struct mlx4_en_dev *mdev = priv->mdev;
759 int i;
760 int err = 0;
761
762 mutex_lock(&mdev->state_lock);
763
764 if (!mdev->device_up) {
765 en_err(priv, "Cannot open - device down/disabled\n");
766 err = -EBUSY;
767 goto out;
768 }
769
770 /* Reset HW statistics and performance counters */
771 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
772 en_dbg(HW, priv, "Failed dumping statistics\n");
773
774 memset(&priv->stats, 0, sizeof(priv->stats));
775 memset(&priv->pstats, 0, sizeof(priv->pstats));
776
777 for (i = 0; i < priv->tx_ring_num; i++) {
778 priv->tx_ring[i].bytes = 0;
779 priv->tx_ring[i].packets = 0;
780 }
781 for (i = 0; i < priv->rx_ring_num; i++) {
782 priv->rx_ring[i].bytes = 0;
783 priv->rx_ring[i].packets = 0;
784 }
785
786 mlx4_en_set_default_moderation(priv);
787 err = mlx4_en_start_port(dev);
788 if (err)
789 en_err(priv, "Failed starting port:%d\n", priv->port);
790
791 out:
792 mutex_unlock(&mdev->state_lock);
793 return err;
794 }
795
796
797 static int mlx4_en_close(struct net_device *dev)
798 {
799 struct mlx4_en_priv *priv = netdev_priv(dev);
800 struct mlx4_en_dev *mdev = priv->mdev;
801
802 en_dbg(IFDOWN, priv, "Close port called\n");
803
804 mutex_lock(&mdev->state_lock);
805
806 mlx4_en_stop_port(dev);
807 netif_carrier_off(dev);
808
809 mutex_unlock(&mdev->state_lock);
810 return 0;
811 }
812
813 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
814 {
815 int i;
816
817 for (i = 0; i < priv->tx_ring_num; i++) {
818 if (priv->tx_ring[i].tx_info)
819 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
820 if (priv->tx_cq[i].buf)
821 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
822 }
823
824 for (i = 0; i < priv->rx_ring_num; i++) {
825 if (priv->rx_ring[i].rx_info)
826 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
827 if (priv->rx_cq[i].buf)
828 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
829 }
830 }
831
832 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
833 {
834 struct mlx4_en_port_profile *prof = priv->prof;
835 int i;
836
837 /* Create tx Rings */
838 for (i = 0; i < priv->tx_ring_num; i++) {
839 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
840 prof->tx_ring_size, i, TX))
841 goto err;
842
843 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
844 prof->tx_ring_size, TXBB_SIZE))
845 goto err;
846 }
847
848 /* Create rx Rings */
849 for (i = 0; i < priv->rx_ring_num; i++) {
850 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
851 prof->rx_ring_size, i, RX))
852 goto err;
853
854 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
855 prof->rx_ring_size, priv->stride))
856 goto err;
857 }
858
859 return 0;
860
861 err:
862 en_err(priv, "Failed to allocate NIC resources\n");
863 return -ENOMEM;
864 }
865
866
867 void mlx4_en_destroy_netdev(struct net_device *dev)
868 {
869 struct mlx4_en_priv *priv = netdev_priv(dev);
870 struct mlx4_en_dev *mdev = priv->mdev;
871
872 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
873
874 /* Unregister device - this will close the port if it was up */
875 if (priv->registered)
876 unregister_netdev(dev);
877
878 if (priv->allocated)
879 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
880
881 cancel_delayed_work(&priv->stats_task);
882 /* flush any pending task for this netdev */
883 flush_workqueue(mdev->workqueue);
884
885 /* Detach the netdev so tasks would not attempt to access it */
886 mutex_lock(&mdev->state_lock);
887 mdev->pndev[priv->port] = NULL;
888 mutex_unlock(&mdev->state_lock);
889
890 mlx4_en_free_resources(priv);
891 free_netdev(dev);
892 }
893
894 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
895 {
896 struct mlx4_en_priv *priv = netdev_priv(dev);
897 struct mlx4_en_dev *mdev = priv->mdev;
898 int err = 0;
899
900 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
901 dev->mtu, new_mtu);
902
903 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
904 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
905 return -EPERM;
906 }
907 dev->mtu = new_mtu;
908
909 if (netif_running(dev)) {
910 mutex_lock(&mdev->state_lock);
911 if (!mdev->device_up) {
912 /* NIC is probably restarting - let watchdog task reset
913 * the port */
914 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
915 } else {
916 mlx4_en_stop_port(dev);
917 mlx4_en_set_default_moderation(priv);
918 err = mlx4_en_start_port(dev);
919 if (err) {
920 en_err(priv, "Failed restarting port:%d\n",
921 priv->port);
922 queue_work(mdev->workqueue, &priv->watchdog_task);
923 }
924 }
925 mutex_unlock(&mdev->state_lock);
926 }
927 return 0;
928 }
929
930 static const struct net_device_ops mlx4_netdev_ops = {
931 .ndo_open = mlx4_en_open,
932 .ndo_stop = mlx4_en_close,
933 .ndo_start_xmit = mlx4_en_xmit,
934 .ndo_select_queue = mlx4_en_select_queue,
935 .ndo_get_stats = mlx4_en_get_stats,
936 .ndo_set_multicast_list = mlx4_en_set_multicast,
937 .ndo_set_mac_address = mlx4_en_set_mac,
938 .ndo_validate_addr = eth_validate_addr,
939 .ndo_change_mtu = mlx4_en_change_mtu,
940 .ndo_tx_timeout = mlx4_en_tx_timeout,
941 .ndo_vlan_rx_register = mlx4_en_vlan_rx_register,
942 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
943 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
944 #ifdef CONFIG_NET_POLL_CONTROLLER
945 .ndo_poll_controller = mlx4_en_netpoll,
946 #endif
947 };
948
949 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
950 struct mlx4_en_port_profile *prof)
951 {
952 struct net_device *dev;
953 struct mlx4_en_priv *priv;
954 int i;
955 int err;
956
957 dev = alloc_etherdev_mq(sizeof(struct mlx4_en_priv), prof->tx_ring_num);
958 if (dev == NULL) {
959 mlx4_err(mdev, "Net device allocation failed\n");
960 return -ENOMEM;
961 }
962
963 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
964 dev->dev_id = port - 1;
965
966 /*
967 * Initialize driver private data
968 */
969
970 priv = netdev_priv(dev);
971 memset(priv, 0, sizeof(struct mlx4_en_priv));
972 priv->dev = dev;
973 priv->mdev = mdev;
974 priv->prof = prof;
975 priv->port = port;
976 priv->port_up = false;
977 priv->rx_csum = 1;
978 priv->flags = prof->flags;
979 priv->tx_ring_num = prof->tx_ring_num;
980 priv->rx_ring_num = prof->rx_ring_num;
981 priv->mac_index = -1;
982 priv->msg_enable = MLX4_EN_MSG_LEVEL;
983 spin_lock_init(&priv->stats_lock);
984 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
985 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
986 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
987 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
988 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
989
990 /* Query for default mac and max mtu */
991 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
992 priv->mac = mdev->dev->caps.def_mac[priv->port];
993 if (ILLEGAL_MAC(priv->mac)) {
994 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
995 priv->port, priv->mac);
996 err = -EINVAL;
997 goto out;
998 }
999
1000 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1001 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1002 err = mlx4_en_alloc_resources(priv);
1003 if (err)
1004 goto out;
1005
1006 /* Allocate page for receive rings */
1007 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1008 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1009 if (err) {
1010 en_err(priv, "Failed to allocate page for rx qps\n");
1011 goto out;
1012 }
1013 priv->allocated = 1;
1014
1015 /*
1016 * Initialize netdev entry points
1017 */
1018 dev->netdev_ops = &mlx4_netdev_ops;
1019 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1020 dev->real_num_tx_queues = MLX4_EN_NUM_TX_RINGS;
1021
1022 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1023
1024 /* Set defualt MAC */
1025 dev->addr_len = ETH_ALEN;
1026 for (i = 0; i < ETH_ALEN; i++)
1027 dev->dev_addr[ETH_ALEN - 1 - i] =
1028 (u8) (priv->mac >> (8 * i));
1029
1030 /*
1031 * Set driver features
1032 */
1033 dev->features |= NETIF_F_SG;
1034 dev->vlan_features |= NETIF_F_SG;
1035 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1036 dev->vlan_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1037 dev->features |= NETIF_F_HIGHDMA;
1038 dev->features |= NETIF_F_HW_VLAN_TX |
1039 NETIF_F_HW_VLAN_RX |
1040 NETIF_F_HW_VLAN_FILTER;
1041 if (mdev->profile.num_lro)
1042 dev->features |= NETIF_F_LRO;
1043 if (mdev->LSO_support) {
1044 dev->features |= NETIF_F_TSO;
1045 dev->features |= NETIF_F_TSO6;
1046 dev->vlan_features |= NETIF_F_TSO;
1047 dev->vlan_features |= NETIF_F_TSO6;
1048 }
1049
1050 mdev->pndev[port] = dev;
1051
1052 netif_carrier_off(dev);
1053 err = register_netdev(dev);
1054 if (err) {
1055 en_err(priv, "Netdev registration failed for port %d\n", port);
1056 goto out;
1057 }
1058
1059 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1060 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1061
1062 priv->registered = 1;
1063 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1064 return 0;
1065
1066 out:
1067 mlx4_en_destroy_netdev(dev);
1068 return err;
1069 }
1070
Linux kernel - Deliverables
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