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mlx4_en: using new mlx4 interrupt scheme
[linux/fpc-iii.git] / drivers / net / mlx4 / en_netdev.c
blobf6ed315b4b8921901b52023516b5cbee9b9f877a
1 /*
2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34 #include <linux/etherdevice.h>
35 #include <linux/tcp.h>
36 #include <linux/if_vlan.h>
37 #include <linux/delay.h>
38 #include <linux/slab.h>
39
40 #include <linux/mlx4/driver.h>
41 #include <linux/mlx4/device.h>
42 #include <linux/mlx4/cmd.h>
43 #include <linux/mlx4/cq.h>
44
45 #include "mlx4_en.h"
46 #include "en_port.h"
47
48
49 static void mlx4_en_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
50 {
51 struct mlx4_en_priv *priv = netdev_priv(dev);
52 struct mlx4_en_dev *mdev = priv->mdev;
53 int err;
54
55 en_dbg(HW, priv, "Registering VLAN group:%p\n", grp);
56 priv->vlgrp = grp;
57
58 mutex_lock(&mdev->state_lock);
59 if (mdev->device_up && priv->port_up) {
60 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, grp);
61 if (err)
62 en_err(priv, "Failed configuring VLAN filter\n");
63 }
64 mutex_unlock(&mdev->state_lock);
65 }
66
67 static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
68 {
69 struct mlx4_en_priv *priv = netdev_priv(dev);
70 struct mlx4_en_dev *mdev = priv->mdev;
71 int err;
72 int idx;
73
74 if (!priv->vlgrp)
75 return;
76
77 en_dbg(HW, priv, "adding VLAN:%d (vlgrp entry:%p)\n",
78 vid, vlan_group_get_device(priv->vlgrp, vid));
79
80 /* Add VID to port VLAN filter */
81 mutex_lock(&mdev->state_lock);
82 if (mdev->device_up && priv->port_up) {
83 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
84 if (err)
85 en_err(priv, "Failed configuring VLAN filter\n");
86 }
87 if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
88 en_err(priv, "failed adding vlan %d\n", vid);
89 mutex_unlock(&mdev->state_lock);
90
91 }
92
93 static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
94 {
95 struct mlx4_en_priv *priv = netdev_priv(dev);
96 struct mlx4_en_dev *mdev = priv->mdev;
97 int err;
98 int idx;
99
100 if (!priv->vlgrp)
101 return;
102
103 en_dbg(HW, priv, "Killing VID:%d (vlgrp:%p vlgrp entry:%p)\n",
104 vid, priv->vlgrp, vlan_group_get_device(priv->vlgrp, vid));
105 vlan_group_set_device(priv->vlgrp, vid, NULL);
106
107 /* Remove VID from port VLAN filter */
108 mutex_lock(&mdev->state_lock);
109 if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
110 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
111 else
112 en_err(priv, "could not find vid %d in cache\n", vid);
113
114 if (mdev->device_up && priv->port_up) {
115 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
116 if (err)
117 en_err(priv, "Failed configuring VLAN filter\n");
118 }
119 mutex_unlock(&mdev->state_lock);
120 }
121
122 u64 mlx4_en_mac_to_u64(u8 *addr)
123 {
124 u64 mac = 0;
125 int i;
126
127 for (i = 0; i < ETH_ALEN; i++) {
128 mac <<= 8;
129 mac |= addr[i];
130 }
131 return mac;
132 }
133
134 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
135 {
136 struct mlx4_en_priv *priv = netdev_priv(dev);
137 struct mlx4_en_dev *mdev = priv->mdev;
138 struct sockaddr *saddr = addr;
139
140 if (!is_valid_ether_addr(saddr->sa_data))
141 return -EADDRNOTAVAIL;
142
143 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
144 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
145 queue_work(mdev->workqueue, &priv->mac_task);
146 return 0;
147 }
148
149 static void mlx4_en_do_set_mac(struct work_struct *work)
150 {
151 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
152 mac_task);
153 struct mlx4_en_dev *mdev = priv->mdev;
154 int err = 0;
155
156 mutex_lock(&mdev->state_lock);
157 if (priv->port_up) {
158 /* Remove old MAC and insert the new one */
159 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
160 err = mlx4_register_mac(mdev->dev, priv->port,
161 priv->mac, &priv->mac_index);
162 if (err)
163 en_err(priv, "Failed changing HW MAC address\n");
164 } else
165 en_dbg(HW, priv, "Port is down while "
166 "registering mac, exiting...\n");
167
168 mutex_unlock(&mdev->state_lock);
169 }
170
171 static void mlx4_en_clear_list(struct net_device *dev)
172 {
173 struct mlx4_en_priv *priv = netdev_priv(dev);
174
175 kfree(priv->mc_addrs);
176 priv->mc_addrs_cnt = 0;
177 }
178
179 static void mlx4_en_cache_mclist(struct net_device *dev)
180 {
181 struct mlx4_en_priv *priv = netdev_priv(dev);
182 struct netdev_hw_addr *ha;
183 char *mc_addrs;
184 int mc_addrs_cnt = netdev_mc_count(dev);
185 int i;
186
187 mc_addrs = kmalloc(mc_addrs_cnt * ETH_ALEN, GFP_ATOMIC);
188 if (!mc_addrs) {
189 en_err(priv, "failed to allocate multicast list\n");
190 return;
191 }
192 i = 0;
193 netdev_for_each_mc_addr(ha, dev)
194 memcpy(mc_addrs + i++ * ETH_ALEN, ha->addr, ETH_ALEN);
195 priv->mc_addrs = mc_addrs;
196 priv->mc_addrs_cnt = mc_addrs_cnt;
197 }
198
199
200 static void mlx4_en_set_multicast(struct net_device *dev)
201 {
202 struct mlx4_en_priv *priv = netdev_priv(dev);
203
204 if (!priv->port_up)
205 return;
206
207 queue_work(priv->mdev->workqueue, &priv->mcast_task);
208 }
209
210 static void mlx4_en_do_set_multicast(struct work_struct *work)
211 {
212 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
213 mcast_task);
214 struct mlx4_en_dev *mdev = priv->mdev;
215 struct net_device *dev = priv->dev;
216 u64 mcast_addr = 0;
217 int err;
218
219 mutex_lock(&mdev->state_lock);
220 if (!mdev->device_up) {
221 en_dbg(HW, priv, "Card is not up, "
222 "ignoring multicast change.\n");
223 goto out;
224 }
225 if (!priv->port_up) {
226 en_dbg(HW, priv, "Port is down, "
227 "ignoring multicast change.\n");
228 goto out;
229 }
230
231 /*
232 * Promsicuous mode: disable all filters
233 */
234
235 if (dev->flags & IFF_PROMISC) {
236 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
237 if (netif_msg_rx_status(priv))
238 en_warn(priv, "Entering promiscuous mode\n");
239 priv->flags |= MLX4_EN_FLAG_PROMISC;
240
241 /* Enable promiscouos mode */
242 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
243 priv->base_qpn, 1);
244 if (err)
245 en_err(priv, "Failed enabling "
246 "promiscous mode\n");
247
248 /* Disable port multicast filter (unconditionally) */
249 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
250 0, MLX4_MCAST_DISABLE);
251 if (err)
252 en_err(priv, "Failed disabling "
253 "multicast filter\n");
254
255 /* Disable port VLAN filter */
256 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
257 if (err)
258 en_err(priv, "Failed disabling VLAN filter\n");
259 }
260 goto out;
261 }
262
263 /*
264 * Not in promiscous mode
265 */
266
267 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
268 if (netif_msg_rx_status(priv))
269 en_warn(priv, "Leaving promiscuous mode\n");
270 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
271
272 /* Disable promiscouos mode */
273 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
274 priv->base_qpn, 0);
275 if (err)
276 en_err(priv, "Failed disabling promiscous mode\n");
277
278 /* Enable port VLAN filter */
279 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
280 if (err)
281 en_err(priv, "Failed enabling VLAN filter\n");
282 }
283
284 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
285 if (dev->flags & IFF_ALLMULTI) {
286 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
287 0, MLX4_MCAST_DISABLE);
288 if (err)
289 en_err(priv, "Failed disabling multicast filter\n");
290 } else {
291 int i;
292
293 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
294 0, MLX4_MCAST_DISABLE);
295 if (err)
296 en_err(priv, "Failed disabling multicast filter\n");
297
298 /* Flush mcast filter and init it with broadcast address */
299 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
300 1, MLX4_MCAST_CONFIG);
301
302 /* Update multicast list - we cache all addresses so they won't
303 * change while HW is updated holding the command semaphor */
304 netif_tx_lock_bh(dev);
305 mlx4_en_cache_mclist(dev);
306 netif_tx_unlock_bh(dev);
307 for (i = 0; i < priv->mc_addrs_cnt; i++) {
308 mcast_addr =
309 mlx4_en_mac_to_u64(priv->mc_addrs + i * ETH_ALEN);
310 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
311 mcast_addr, 0, MLX4_MCAST_CONFIG);
312 }
313 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
314 0, MLX4_MCAST_ENABLE);
315 if (err)
316 en_err(priv, "Failed enabling multicast filter\n");
317
318 mlx4_en_clear_list(dev);
319 }
320 out:
321 mutex_unlock(&mdev->state_lock);
322 }
323
324 #ifdef CONFIG_NET_POLL_CONTROLLER
325 static void mlx4_en_netpoll(struct net_device *dev)
326 {
327 struct mlx4_en_priv *priv = netdev_priv(dev);
328 struct mlx4_en_cq *cq;
329 unsigned long flags;
330 int i;
331
332 for (i = 0; i < priv->rx_ring_num; i++) {
333 cq = &priv->rx_cq[i];
334 spin_lock_irqsave(&cq->lock, flags);
335 napi_synchronize(&cq->napi);
336 mlx4_en_process_rx_cq(dev, cq, 0);
337 spin_unlock_irqrestore(&cq->lock, flags);
338 }
339 }
340 #endif
341
342 static void mlx4_en_tx_timeout(struct net_device *dev)
343 {
344 struct mlx4_en_priv *priv = netdev_priv(dev);
345 struct mlx4_en_dev *mdev = priv->mdev;
346
347 if (netif_msg_timer(priv))
348 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
349
350 priv->port_stats.tx_timeout++;
351 en_dbg(DRV, priv, "Scheduling watchdog\n");
352 queue_work(mdev->workqueue, &priv->watchdog_task);
353 }
354
355
356 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
357 {
358 struct mlx4_en_priv *priv = netdev_priv(dev);
359
360 spin_lock_bh(&priv->stats_lock);
361 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
362 spin_unlock_bh(&priv->stats_lock);
363
364 return &priv->ret_stats;
365 }
366
367 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
368 {
369 struct mlx4_en_cq *cq;
370 int i;
371
372 /* If we haven't received a specific coalescing setting
373 * (module param), we set the moderation parameters as follows:
374 * - moder_cnt is set to the number of mtu sized packets to
375 * satisfy our coelsing target.
376 * - moder_time is set to a fixed value.
377 */
378 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
379 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
380 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
381 "rx_frames:%d rx_usecs:%d\n",
382 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
383
384 /* Setup cq moderation params */
385 for (i = 0; i < priv->rx_ring_num; i++) {
386 cq = &priv->rx_cq[i];
387 cq->moder_cnt = priv->rx_frames;
388 cq->moder_time = priv->rx_usecs;
389 }
390
391 for (i = 0; i < priv->tx_ring_num; i++) {
392 cq = &priv->tx_cq[i];
393 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
394 cq->moder_time = MLX4_EN_TX_COAL_TIME;
395 }
396
397 /* Reset auto-moderation params */
398 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
399 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
400 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
401 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
402 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
403 priv->adaptive_rx_coal = 1;
404 priv->last_moder_time = MLX4_EN_AUTO_CONF;
405 priv->last_moder_jiffies = 0;
406 priv->last_moder_packets = 0;
407 priv->last_moder_tx_packets = 0;
408 priv->last_moder_bytes = 0;
409 }
410
411 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
412 {
413 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
414 struct mlx4_en_cq *cq;
415 unsigned long packets;
416 unsigned long rate;
417 unsigned long avg_pkt_size;
418 unsigned long rx_packets;
419 unsigned long rx_bytes;
420 unsigned long tx_packets;
421 unsigned long tx_pkt_diff;
422 unsigned long rx_pkt_diff;
423 int moder_time;
424 int i, err;
425
426 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
427 return;
428
429 spin_lock_bh(&priv->stats_lock);
430 rx_packets = priv->stats.rx_packets;
431 rx_bytes = priv->stats.rx_bytes;
432 tx_packets = priv->stats.tx_packets;
433 spin_unlock_bh(&priv->stats_lock);
434
435 if (!priv->last_moder_jiffies || !period)
436 goto out;
437
438 tx_pkt_diff = ((unsigned long) (tx_packets -
439 priv->last_moder_tx_packets));
440 rx_pkt_diff = ((unsigned long) (rx_packets -
441 priv->last_moder_packets));
442 packets = max(tx_pkt_diff, rx_pkt_diff);
443 rate = packets * HZ / period;
444 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
445 priv->last_moder_bytes)) / packets : 0;
446
447 /* Apply auto-moderation only when packet rate exceeds a rate that
448 * it matters */
449 if (rate > MLX4_EN_RX_RATE_THRESH && avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
450 /* If tx and rx packet rates are not balanced, assume that
451 * traffic is mainly BW bound and apply maximum moderation.
452 * Otherwise, moderate according to packet rate */
453 if (2 * tx_pkt_diff > 3 * rx_pkt_diff ||
454 2 * rx_pkt_diff > 3 * tx_pkt_diff) {
455 moder_time = priv->rx_usecs_high;
456 } else {
457 if (rate < priv->pkt_rate_low)
458 moder_time = priv->rx_usecs_low;
459 else if (rate > priv->pkt_rate_high)
460 moder_time = priv->rx_usecs_high;
461 else
462 moder_time = (rate - priv->pkt_rate_low) *
463 (priv->rx_usecs_high - priv->rx_usecs_low) /
464 (priv->pkt_rate_high - priv->pkt_rate_low) +
465 priv->rx_usecs_low;
466 }
467 } else {
468 moder_time = priv->rx_usecs_low;
469 }
470
471 en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
472 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
473
474 en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
475 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
476 priv->last_moder_time, moder_time, period, packets,
477 avg_pkt_size, rate);
478
479 if (moder_time != priv->last_moder_time) {
480 priv->last_moder_time = moder_time;
481 for (i = 0; i < priv->rx_ring_num; i++) {
482 cq = &priv->rx_cq[i];
483 cq->moder_time = moder_time;
484 err = mlx4_en_set_cq_moder(priv, cq);
485 if (err) {
486 en_err(priv, "Failed modifying moderation for cq:%d\n", i);
487 break;
488 }
489 }
490 }
491
492 out:
493 priv->last_moder_packets = rx_packets;
494 priv->last_moder_tx_packets = tx_packets;
495 priv->last_moder_bytes = rx_bytes;
496 priv->last_moder_jiffies = jiffies;
497 }
498
499 static void mlx4_en_do_get_stats(struct work_struct *work)
500 {
501 struct delayed_work *delay = to_delayed_work(work);
502 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
503 stats_task);
504 struct mlx4_en_dev *mdev = priv->mdev;
505 int err;
506
507 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
508 if (err)
509 en_dbg(HW, priv, "Could not update stats\n");
510
511 mutex_lock(&mdev->state_lock);
512 if (mdev->device_up) {
513 if (priv->port_up)
514 mlx4_en_auto_moderation(priv);
515
516 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
517 }
518 if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
519 queue_work(mdev->workqueue, &priv->mac_task);
520 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
521 }
522 mutex_unlock(&mdev->state_lock);
523 }
524
525 static void mlx4_en_linkstate(struct work_struct *work)
526 {
527 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
528 linkstate_task);
529 struct mlx4_en_dev *mdev = priv->mdev;
530 int linkstate = priv->link_state;
531
532 mutex_lock(&mdev->state_lock);
533 /* If observable port state changed set carrier state and
534 * report to system log */
535 if (priv->last_link_state != linkstate) {
536 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
537 en_info(priv, "Link Down\n");
538 netif_carrier_off(priv->dev);
539 } else {
540 en_info(priv, "Link Up\n");
541 netif_carrier_on(priv->dev);
542 }
543 }
544 priv->last_link_state = linkstate;
545 mutex_unlock(&mdev->state_lock);
546 }
547
548
549 int mlx4_en_start_port(struct net_device *dev)
550 {
551 struct mlx4_en_priv *priv = netdev_priv(dev);
552 struct mlx4_en_dev *mdev = priv->mdev;
553 struct mlx4_en_cq *cq;
554 struct mlx4_en_tx_ring *tx_ring;
555 int rx_index = 0;
556 int tx_index = 0;
557 int err = 0;
558 int i;
559 int j;
560 char name[32];
561
562 if (priv->port_up) {
563 en_dbg(DRV, priv, "start port called while port already up\n");
564 return 0;
565 }
566
567 /* Calculate Rx buf size */
568 dev->mtu = min(dev->mtu, priv->max_mtu);
569 mlx4_en_calc_rx_buf(dev);
570 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
571
572 /* Configure rx cq's and rings */
573 err = mlx4_en_activate_rx_rings(priv);
574 if (err) {
575 en_err(priv, "Failed to activate RX rings\n");
576 return err;
577 }
578 for (i = 0; i < priv->rx_ring_num; i++) {
579 cq = &priv->rx_cq[i];
580
581 err = mlx4_en_activate_cq(priv, cq);
582 if (err) {
583 en_err(priv, "Failed activating Rx CQ\n");
584 goto cq_err;
585 }
586 for (j = 0; j < cq->size; j++)
587 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
588 err = mlx4_en_set_cq_moder(priv, cq);
589 if (err) {
590 en_err(priv, "Failed setting cq moderation parameters");
591 mlx4_en_deactivate_cq(priv, cq);
592 goto cq_err;
593 }
594 mlx4_en_arm_cq(priv, cq);
595 priv->rx_ring[i].cqn = cq->mcq.cqn;
596 ++rx_index;
597 }
598
599 err = mlx4_en_config_rss_steer(priv);
600 if (err) {
601 en_err(priv, "Failed configuring rss steering\n");
602 goto cq_err;
603 }
604
605 if (mdev->dev->caps.comp_pool && !priv->tx_vector) {
606 sprintf(name , "%s-tx", priv->dev->name);
607 if (mlx4_assign_eq(mdev->dev , name, &priv->tx_vector)) {
608 mlx4_warn(mdev, "Failed Assigning an EQ to "
609 "%s_tx ,Falling back to legacy "
610 "EQ's\n", priv->dev->name);
611 }
612 }
613 /* Configure tx cq's and rings */
614 for (i = 0; i < priv->tx_ring_num; i++) {
615 /* Configure cq */
616 cq = &priv->tx_cq[i];
617 cq->vector = priv->tx_vector;
618 err = mlx4_en_activate_cq(priv, cq);
619 if (err) {
620 en_err(priv, "Failed allocating Tx CQ\n");
621 goto tx_err;
622 }
623 err = mlx4_en_set_cq_moder(priv, cq);
624 if (err) {
625 en_err(priv, "Failed setting cq moderation parameters");
626 mlx4_en_deactivate_cq(priv, cq);
627 goto tx_err;
628 }
629 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
630 cq->buf->wqe_index = cpu_to_be16(0xffff);
631
632 /* Configure ring */
633 tx_ring = &priv->tx_ring[i];
634 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn);
635 if (err) {
636 en_err(priv, "Failed allocating Tx ring\n");
637 mlx4_en_deactivate_cq(priv, cq);
638 goto tx_err;
639 }
640 /* Set initial ownership of all Tx TXBBs to SW (1) */
641 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
642 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
643 ++tx_index;
644 }
645
646 /* Configure port */
647 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
648 priv->rx_skb_size + ETH_FCS_LEN,
649 priv->prof->tx_pause,
650 priv->prof->tx_ppp,
651 priv->prof->rx_pause,
652 priv->prof->rx_ppp);
653 if (err) {
654 en_err(priv, "Failed setting port general configurations "
655 "for port %d, with error %d\n", priv->port, err);
656 goto tx_err;
657 }
658 /* Set default qp number */
659 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
660 if (err) {
661 en_err(priv, "Failed setting default qp numbers\n");
662 goto tx_err;
663 }
664 /* Set port mac number */
665 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
666 err = mlx4_register_mac(mdev->dev, priv->port,
667 priv->mac, &priv->mac_index);
668 if (err) {
669 en_err(priv, "Failed setting port mac\n");
670 goto tx_err;
671 }
672 mdev->mac_removed[priv->port] = 0;
673
674 /* Init port */
675 en_dbg(HW, priv, "Initializing port\n");
676 err = mlx4_INIT_PORT(mdev->dev, priv->port);
677 if (err) {
678 en_err(priv, "Failed Initializing port\n");
679 goto mac_err;
680 }
681
682 /* Schedule multicast task to populate multicast list */
683 queue_work(mdev->workqueue, &priv->mcast_task);
684
685 priv->port_up = true;
686 netif_tx_start_all_queues(dev);
687 return 0;
688
689 mac_err:
690 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
691 tx_err:
692 while (tx_index--) {
693 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
694 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
695 }
696
697 mlx4_en_release_rss_steer(priv);
698 cq_err:
699 while (rx_index--)
700 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
701 for (i = 0; i < priv->rx_ring_num; i++)
702 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
703
704 return err; /* need to close devices */
705 }
706
707
708 void mlx4_en_stop_port(struct net_device *dev)
709 {
710 struct mlx4_en_priv *priv = netdev_priv(dev);
711 struct mlx4_en_dev *mdev = priv->mdev;
712 int i;
713
714 if (!priv->port_up) {
715 en_dbg(DRV, priv, "stop port called while port already down\n");
716 return;
717 }
718
719 /* Synchronize with tx routine */
720 netif_tx_lock_bh(dev);
721 netif_tx_stop_all_queues(dev);
722 netif_tx_unlock_bh(dev);
723
724 /* Set port as not active */
725 priv->port_up = false;
726
727 /* Unregister Mac address for the port */
728 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
729 mdev->mac_removed[priv->port] = 1;
730
731 /* Free TX Rings */
732 for (i = 0; i < priv->tx_ring_num; i++) {
733 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
734 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
735 }
736 msleep(10);
737
738 for (i = 0; i < priv->tx_ring_num; i++)
739 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
740
741 /* Free RSS qps */
742 mlx4_en_release_rss_steer(priv);
743
744 /* Free RX Rings */
745 for (i = 0; i < priv->rx_ring_num; i++) {
746 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
747 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
748 msleep(1);
749 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
750 }
751
752 /* close port*/
753 mlx4_CLOSE_PORT(mdev->dev, priv->port);
754 }
755
756 static void mlx4_en_restart(struct work_struct *work)
757 {
758 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
759 watchdog_task);
760 struct mlx4_en_dev *mdev = priv->mdev;
761 struct net_device *dev = priv->dev;
762
763 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
764
765 mutex_lock(&mdev->state_lock);
766 if (priv->port_up) {
767 mlx4_en_stop_port(dev);
768 if (mlx4_en_start_port(dev))
769 en_err(priv, "Failed restarting port %d\n", priv->port);
770 }
771 mutex_unlock(&mdev->state_lock);
772 }
773
774
775 static int mlx4_en_open(struct net_device *dev)
776 {
777 struct mlx4_en_priv *priv = netdev_priv(dev);
778 struct mlx4_en_dev *mdev = priv->mdev;
779 int i;
780 int err = 0;
781
782 mutex_lock(&mdev->state_lock);
783
784 if (!mdev->device_up) {
785 en_err(priv, "Cannot open - device down/disabled\n");
786 err = -EBUSY;
787 goto out;
788 }
789
790 /* Reset HW statistics and performance counters */
791 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
792 en_dbg(HW, priv, "Failed dumping statistics\n");
793
794 memset(&priv->stats, 0, sizeof(priv->stats));
795 memset(&priv->pstats, 0, sizeof(priv->pstats));
796
797 for (i = 0; i < priv->tx_ring_num; i++) {
798 priv->tx_ring[i].bytes = 0;
799 priv->tx_ring[i].packets = 0;
800 }
801 for (i = 0; i < priv->rx_ring_num; i++) {
802 priv->rx_ring[i].bytes = 0;
803 priv->rx_ring[i].packets = 0;
804 }
805
806 err = mlx4_en_start_port(dev);
807 if (err)
808 en_err(priv, "Failed starting port:%d\n", priv->port);
809
810 out:
811 mutex_unlock(&mdev->state_lock);
812 return err;
813 }
814
815
816 static int mlx4_en_close(struct net_device *dev)
817 {
818 struct mlx4_en_priv *priv = netdev_priv(dev);
819 struct mlx4_en_dev *mdev = priv->mdev;
820
821 en_dbg(IFDOWN, priv, "Close port called\n");
822
823 mutex_lock(&mdev->state_lock);
824
825 mlx4_en_stop_port(dev);
826 netif_carrier_off(dev);
827
828 mutex_unlock(&mdev->state_lock);
829 return 0;
830 }
831
832 void mlx4_en_free_resources(struct mlx4_en_priv *priv, bool reserve_vectors)
833 {
834 int i;
835
836 for (i = 0; i < priv->tx_ring_num; i++) {
837 if (priv->tx_ring[i].tx_info)
838 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
839 if (priv->tx_cq[i].buf)
840 mlx4_en_destroy_cq(priv, &priv->tx_cq[i], reserve_vectors);
841 }
842
843 for (i = 0; i < priv->rx_ring_num; i++) {
844 if (priv->rx_ring[i].rx_info)
845 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
846 if (priv->rx_cq[i].buf)
847 mlx4_en_destroy_cq(priv, &priv->rx_cq[i], reserve_vectors);
848 }
849 }
850
851 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
852 {
853 struct mlx4_en_port_profile *prof = priv->prof;
854 int i;
855
856 /* Create tx Rings */
857 for (i = 0; i < priv->tx_ring_num; i++) {
858 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
859 prof->tx_ring_size, i, TX))
860 goto err;
861
862 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
863 prof->tx_ring_size, TXBB_SIZE))
864 goto err;
865 }
866
867 /* Create rx Rings */
868 for (i = 0; i < priv->rx_ring_num; i++) {
869 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
870 prof->rx_ring_size, i, RX))
871 goto err;
872
873 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
874 prof->rx_ring_size, priv->stride))
875 goto err;
876 }
877
878 return 0;
879
880 err:
881 en_err(priv, "Failed to allocate NIC resources\n");
882 return -ENOMEM;
883 }
884
885
886 void mlx4_en_destroy_netdev(struct net_device *dev)
887 {
888 struct mlx4_en_priv *priv = netdev_priv(dev);
889 struct mlx4_en_dev *mdev = priv->mdev;
890
891 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
892
893 /* Unregister device - this will close the port if it was up */
894 if (priv->registered)
895 unregister_netdev(dev);
896
897 if (priv->allocated)
898 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
899
900 cancel_delayed_work(&priv->stats_task);
901 /* flush any pending task for this netdev */
902 flush_workqueue(mdev->workqueue);
903
904 /* Detach the netdev so tasks would not attempt to access it */
905 mutex_lock(&mdev->state_lock);
906 mdev->pndev[priv->port] = NULL;
907 mutex_unlock(&mdev->state_lock);
908
909 mlx4_en_free_resources(priv, false);
910 free_netdev(dev);
911 }
912
913 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
914 {
915 struct mlx4_en_priv *priv = netdev_priv(dev);
916 struct mlx4_en_dev *mdev = priv->mdev;
917 int err = 0;
918
919 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
920 dev->mtu, new_mtu);
921
922 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
923 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
924 return -EPERM;
925 }
926 dev->mtu = new_mtu;
927
928 if (netif_running(dev)) {
929 mutex_lock(&mdev->state_lock);
930 if (!mdev->device_up) {
931 /* NIC is probably restarting - let watchdog task reset
932 * the port */
933 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
934 } else {
935 mlx4_en_stop_port(dev);
936 err = mlx4_en_start_port(dev);
937 if (err) {
938 en_err(priv, "Failed restarting port:%d\n",
939 priv->port);
940 queue_work(mdev->workqueue, &priv->watchdog_task);
941 }
942 }
943 mutex_unlock(&mdev->state_lock);
944 }
945 return 0;
946 }
947
948 static const struct net_device_ops mlx4_netdev_ops = {
949 .ndo_open = mlx4_en_open,
950 .ndo_stop = mlx4_en_close,
951 .ndo_start_xmit = mlx4_en_xmit,
952 .ndo_select_queue = mlx4_en_select_queue,
953 .ndo_get_stats = mlx4_en_get_stats,
954 .ndo_set_multicast_list = mlx4_en_set_multicast,
955 .ndo_set_mac_address = mlx4_en_set_mac,
956 .ndo_validate_addr = eth_validate_addr,
957 .ndo_change_mtu = mlx4_en_change_mtu,
958 .ndo_tx_timeout = mlx4_en_tx_timeout,
959 .ndo_vlan_rx_register = mlx4_en_vlan_rx_register,
960 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
961 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
962 #ifdef CONFIG_NET_POLL_CONTROLLER
963 .ndo_poll_controller = mlx4_en_netpoll,
964 #endif
965 };
966
967 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
968 struct mlx4_en_port_profile *prof)
969 {
970 struct net_device *dev;
971 struct mlx4_en_priv *priv;
972 int i;
973 int err;
974
975 dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
976 prof->tx_ring_num, prof->rx_ring_num);
977 if (dev == NULL) {
978 mlx4_err(mdev, "Net device allocation failed\n");
979 return -ENOMEM;
980 }
981
982 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
983 dev->dev_id = port - 1;
984
985 /*
986 * Initialize driver private data
987 */
988
989 priv = netdev_priv(dev);
990 memset(priv, 0, sizeof(struct mlx4_en_priv));
991 priv->dev = dev;
992 priv->mdev = mdev;
993 priv->prof = prof;
994 priv->port = port;
995 priv->port_up = false;
996 priv->rx_csum = 1;
997 priv->flags = prof->flags;
998 priv->tx_ring_num = prof->tx_ring_num;
999 priv->rx_ring_num = prof->rx_ring_num;
1000 priv->mac_index = -1;
1001 priv->msg_enable = MLX4_EN_MSG_LEVEL;
1002 spin_lock_init(&priv->stats_lock);
1003 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1004 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1005 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1006 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1007 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1008
1009 /* Query for default mac and max mtu */
1010 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1011 priv->mac = mdev->dev->caps.def_mac[priv->port];
1012 if (ILLEGAL_MAC(priv->mac)) {
1013 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1014 priv->port, priv->mac);
1015 err = -EINVAL;
1016 goto out;
1017 }
1018
1019 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1020 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1021 err = mlx4_en_alloc_resources(priv);
1022 if (err)
1023 goto out;
1024
1025 /* Allocate page for receive rings */
1026 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1027 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1028 if (err) {
1029 en_err(priv, "Failed to allocate page for rx qps\n");
1030 goto out;
1031 }
1032 priv->allocated = 1;
1033
1034 /*
1035 * Initialize netdev entry points
1036 */
1037 dev->netdev_ops = &mlx4_netdev_ops;
1038 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1039 netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1040 netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1041
1042 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1043
1044 /* Set defualt MAC */
1045 dev->addr_len = ETH_ALEN;
1046 for (i = 0; i < ETH_ALEN; i++) {
1047 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1048 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1049 }
1050
1051 /*
1052 * Set driver features
1053 */
1054 dev->features |= NETIF_F_SG;
1055 dev->vlan_features |= NETIF_F_SG;
1056 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1057 dev->vlan_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1058 dev->features |= NETIF_F_HIGHDMA;
1059 dev->features |= NETIF_F_HW_VLAN_TX |
1060 NETIF_F_HW_VLAN_RX |
1061 NETIF_F_HW_VLAN_FILTER;
1062 dev->features |= NETIF_F_GRO;
1063 if (mdev->LSO_support) {
1064 dev->features |= NETIF_F_TSO;
1065 dev->features |= NETIF_F_TSO6;
1066 dev->vlan_features |= NETIF_F_TSO;
1067 dev->vlan_features |= NETIF_F_TSO6;
1068 }
1069
1070 mdev->pndev[port] = dev;
1071
1072 netif_carrier_off(dev);
1073 err = register_netdev(dev);
1074 if (err) {
1075 en_err(priv, "Netdev registration failed for port %d\n", port);
1076 goto out;
1077 }
1078
1079 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1080 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1081
1082 /* Configure port */
1083 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1084 MLX4_EN_MIN_MTU,
1085 0, 0, 0, 0);
1086 if (err) {
1087 en_err(priv, "Failed setting port general configurations "
1088 "for port %d, with error %d\n", priv->port, err);
1089 goto out;
1090 }
1091
1092 /* Init port */
1093 en_warn(priv, "Initializing port\n");
1094 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1095 if (err) {
1096 en_err(priv, "Failed Initializing port\n");
1097 goto out;
1098 }
1099 priv->registered = 1;
1100 mlx4_en_set_default_moderation(priv);
1101 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1102 return 0;
1103
1104 out:
1105 mlx4_en_destroy_netdev(dev);
1106 return err;
1107 }
1108
Linux with added FPC-III support