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mlx4_en: Pause parameters per port
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / mlx4 / en_netdev.c
blob96e709d6440a459866b7d5d461113408031d7c23
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
39 #include <linux/mlx4/driver.h>
40 #include <linux/mlx4/device.h>
41 #include <linux/mlx4/cmd.h>
42 #include <linux/mlx4/cq.h>
43
44 #include "mlx4_en.h"
45 #include "en_port.h"
46
47
48 static void mlx4_en_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
49 {
50 struct mlx4_en_priv *priv = netdev_priv(dev);
51 struct mlx4_en_dev *mdev = priv->mdev;
52 int err;
53
54 mlx4_dbg(HW, priv, "Registering VLAN group:%p\n", grp);
55 priv->vlgrp = grp;
56
57 mutex_lock(&mdev->state_lock);
58 if (mdev->device_up && priv->port_up) {
59 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, grp);
60 if (err)
61 mlx4_err(mdev, "Failed configuring VLAN filter\n");
62 }
63 mutex_unlock(&mdev->state_lock);
64 }
65
66 static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
67 {
68 struct mlx4_en_priv *priv = netdev_priv(dev);
69 struct mlx4_en_dev *mdev = priv->mdev;
70 int err;
71
72 if (!priv->vlgrp)
73 return;
74
75 mlx4_dbg(HW, priv, "adding VLAN:%d (vlgrp entry:%p)\n",
76 vid, vlan_group_get_device(priv->vlgrp, vid));
77
78 /* Add VID to port VLAN filter */
79 mutex_lock(&mdev->state_lock);
80 if (mdev->device_up && priv->port_up) {
81 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
82 if (err)
83 mlx4_err(mdev, "Failed configuring VLAN filter\n");
84 }
85 mutex_unlock(&mdev->state_lock);
86 }
87
88 static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
89 {
90 struct mlx4_en_priv *priv = netdev_priv(dev);
91 struct mlx4_en_dev *mdev = priv->mdev;
92 int err;
93
94 if (!priv->vlgrp)
95 return;
96
97 mlx4_dbg(HW, priv, "Killing VID:%d (vlgrp:%p vlgrp "
98 "entry:%p)\n", vid, priv->vlgrp,
99 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 mlx4_err(mdev, "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 mlx4_err(mdev, "Failed changing HW MAC address\n");
154 } else
155 mlx4_dbg(HW, priv, "Port is down, exiting...\n");
156
157 mutex_unlock(&mdev->state_lock);
158 }
159
160 static void mlx4_en_clear_list(struct net_device *dev)
161 {
162 struct mlx4_en_priv *priv = netdev_priv(dev);
163 struct dev_mc_list *plist = priv->mc_list;
164 struct dev_mc_list *next;
165
166 while (plist) {
167 next = plist->next;
168 kfree(plist);
169 plist = next;
170 }
171 priv->mc_list = NULL;
172 }
173
174 static void mlx4_en_cache_mclist(struct net_device *dev)
175 {
176 struct mlx4_en_priv *priv = netdev_priv(dev);
177 struct mlx4_en_dev *mdev = priv->mdev;
178 struct dev_mc_list *mclist;
179 struct dev_mc_list *tmp;
180 struct dev_mc_list *plist = NULL;
181
182 for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
183 tmp = kmalloc(sizeof(struct dev_mc_list), GFP_ATOMIC);
184 if (!tmp) {
185 mlx4_err(mdev, "failed to allocate multicast list\n");
186 mlx4_en_clear_list(dev);
187 return;
188 }
189 memcpy(tmp, mclist, sizeof(struct dev_mc_list));
190 tmp->next = NULL;
191 if (plist)
192 plist->next = tmp;
193 else
194 priv->mc_list = tmp;
195 plist = tmp;
196 }
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 struct dev_mc_list *mclist;
217 u64 mcast_addr = 0;
218 int err;
219
220 mutex_lock(&mdev->state_lock);
221 if (!mdev->device_up) {
222 mlx4_dbg(HW, priv, "Card is not up, ignoring "
223 "multicast change.\n");
224 goto out;
225 }
226 if (!priv->port_up) {
227 mlx4_dbg(HW, priv, "Port is down, ignoring "
228 "multicast change.\n");
229 goto out;
230 }
231
232 /*
233 * Promsicuous mode: disable all filters
234 */
235
236 if (dev->flags & IFF_PROMISC) {
237 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
238 if (netif_msg_rx_status(priv))
239 mlx4_warn(mdev, "Port:%d entering promiscuous mode\n",
240 priv->port);
241 priv->flags |= MLX4_EN_FLAG_PROMISC;
242
243 /* Enable promiscouos mode */
244 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
245 priv->base_qpn, 1);
246 if (err)
247 mlx4_err(mdev, "Failed enabling "
248 "promiscous mode\n");
249
250 /* Disable port multicast filter (unconditionally) */
251 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
252 0, MLX4_MCAST_DISABLE);
253 if (err)
254 mlx4_err(mdev, "Failed disabling "
255 "multicast filter\n");
256
257 /* Disable port VLAN filter */
258 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
259 if (err)
260 mlx4_err(mdev, "Failed disabling "
261 "VLAN filter\n");
262 }
263 goto out;
264 }
265
266 /*
267 * Not in promiscous mode
268 */
269
270 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
271 if (netif_msg_rx_status(priv))
272 mlx4_warn(mdev, "Port:%d leaving promiscuous mode\n",
273 priv->port);
274 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
275
276 /* Disable promiscouos mode */
277 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
278 priv->base_qpn, 0);
279 if (err)
280 mlx4_err(mdev, "Failed disabling promiscous mode\n");
281
282 /* Enable port VLAN filter */
283 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
284 if (err)
285 mlx4_err(mdev, "Failed enabling VLAN filter\n");
286 }
287
288 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
289 if (dev->flags & IFF_ALLMULTI) {
290 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
291 0, MLX4_MCAST_DISABLE);
292 if (err)
293 mlx4_err(mdev, "Failed disabling multicast filter\n");
294 } else {
295 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
296 0, MLX4_MCAST_DISABLE);
297 if (err)
298 mlx4_err(mdev, "Failed disabling multicast filter\n");
299
300 /* Flush mcast filter and init it with broadcast address */
301 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
302 1, MLX4_MCAST_CONFIG);
303
304 /* Update multicast list - we cache all addresses so they won't
305 * change while HW is updated holding the command semaphor */
306 netif_tx_lock_bh(dev);
307 mlx4_en_cache_mclist(dev);
308 netif_tx_unlock_bh(dev);
309 for (mclist = priv->mc_list; mclist; mclist = mclist->next) {
310 mcast_addr = mlx4_en_mac_to_u64(mclist->dmi_addr);
311 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
312 mcast_addr, 0, MLX4_MCAST_CONFIG);
313 }
314 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
315 0, MLX4_MCAST_ENABLE);
316 if (err)
317 mlx4_err(mdev, "Failed enabling multicast filter\n");
318
319 mlx4_en_clear_list(dev);
320 }
321 out:
322 mutex_unlock(&mdev->state_lock);
323 }
324
325 #ifdef CONFIG_NET_POLL_CONTROLLER
326 static void mlx4_en_netpoll(struct net_device *dev)
327 {
328 struct mlx4_en_priv *priv = netdev_priv(dev);
329 struct mlx4_en_cq *cq;
330 unsigned long flags;
331 int i;
332
333 for (i = 0; i < priv->rx_ring_num; i++) {
334 cq = &priv->rx_cq[i];
335 spin_lock_irqsave(&cq->lock, flags);
336 napi_synchronize(&cq->napi);
337 mlx4_en_process_rx_cq(dev, cq, 0);
338 spin_unlock_irqrestore(&cq->lock, flags);
339 }
340 }
341 #endif
342
343 static void mlx4_en_tx_timeout(struct net_device *dev)
344 {
345 struct mlx4_en_priv *priv = netdev_priv(dev);
346 struct mlx4_en_dev *mdev = priv->mdev;
347
348 if (netif_msg_timer(priv))
349 mlx4_warn(mdev, "Tx timeout called on port:%d\n", priv->port);
350
351 if (netif_carrier_ok(dev)) {
352 priv->port_stats.tx_timeout++;
353 mlx4_dbg(DRV, priv, "Scheduling watchdog\n");
354 queue_work(mdev->workqueue, &priv->watchdog_task);
355 }
356 }
357
358
359 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
360 {
361 struct mlx4_en_priv *priv = netdev_priv(dev);
362
363 spin_lock_bh(&priv->stats_lock);
364 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
365 spin_unlock_bh(&priv->stats_lock);
366
367 return &priv->ret_stats;
368 }
369
370 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
371 {
372 struct mlx4_en_dev *mdev = priv->mdev;
373 struct mlx4_en_cq *cq;
374 int i;
375
376 /* If we haven't received a specific coalescing setting
377 * (module param), we set the moderation paramters as follows:
378 * - moder_cnt is set to the number of mtu sized packets to
379 * satisfy our coelsing target.
380 * - moder_time is set to a fixed value.
381 */
382 priv->rx_frames = (mdev->profile.rx_moder_cnt ==
383 MLX4_EN_AUTO_CONF) ?
384 MLX4_EN_RX_COAL_TARGET /
385 priv->dev->mtu + 1 :
386 mdev->profile.rx_moder_cnt;
387 priv->rx_usecs = (mdev->profile.rx_moder_time ==
388 MLX4_EN_AUTO_CONF) ?
389 MLX4_EN_RX_COAL_TIME :
390 mdev->profile.rx_moder_time;
391 mlx4_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
392 "rx_frames:%d rx_usecs:%d\n",
393 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
394
395 /* Setup cq moderation params */
396 for (i = 0; i < priv->rx_ring_num; i++) {
397 cq = &priv->rx_cq[i];
398 cq->moder_cnt = priv->rx_frames;
399 cq->moder_time = priv->rx_usecs;
400 }
401
402 for (i = 0; i < priv->tx_ring_num; i++) {
403 cq = &priv->tx_cq[i];
404 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
405 cq->moder_time = MLX4_EN_TX_COAL_TIME;
406 }
407
408 /* Reset auto-moderation params */
409 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
410 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
411 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
412 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
413 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
414 priv->adaptive_rx_coal = mdev->profile.auto_moder;
415 priv->last_moder_time = MLX4_EN_AUTO_CONF;
416 priv->last_moder_jiffies = 0;
417 priv->last_moder_packets = 0;
418 priv->last_moder_tx_packets = 0;
419 priv->last_moder_bytes = 0;
420 }
421
422 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
423 {
424 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
425 struct mlx4_en_dev *mdev = priv->mdev;
426 struct mlx4_en_cq *cq;
427 unsigned long packets;
428 unsigned long rate;
429 unsigned long avg_pkt_size;
430 unsigned long rx_packets;
431 unsigned long rx_bytes;
432 unsigned long tx_packets;
433 unsigned long tx_pkt_diff;
434 unsigned long rx_pkt_diff;
435 int moder_time;
436 int i, err;
437
438 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
439 return;
440
441 spin_lock_bh(&priv->stats_lock);
442 rx_packets = priv->stats.rx_packets;
443 rx_bytes = priv->stats.rx_bytes;
444 tx_packets = priv->stats.tx_packets;
445 spin_unlock_bh(&priv->stats_lock);
446
447 if (!priv->last_moder_jiffies || !period)
448 goto out;
449
450 tx_pkt_diff = ((unsigned long) (tx_packets -
451 priv->last_moder_tx_packets));
452 rx_pkt_diff = ((unsigned long) (rx_packets -
453 priv->last_moder_packets));
454 packets = max(tx_pkt_diff, rx_pkt_diff);
455 rate = packets * HZ / period;
456 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
457 priv->last_moder_bytes)) / packets : 0;
458
459 /* Apply auto-moderation only when packet rate exceeds a rate that
460 * it matters */
461 if (rate > MLX4_EN_RX_RATE_THRESH) {
462 /* If tx and rx packet rates are not balanced, assume that
463 * traffic is mainly BW bound and apply maximum moderation.
464 * Otherwise, moderate according to packet rate */
465 if (2 * tx_pkt_diff > 3 * rx_pkt_diff ||
466 2 * rx_pkt_diff > 3 * tx_pkt_diff) {
467 moder_time = priv->rx_usecs_high;
468 } else {
469 if (rate < priv->pkt_rate_low)
470 moder_time = priv->rx_usecs_low;
471 else if (rate > priv->pkt_rate_high)
472 moder_time = priv->rx_usecs_high;
473 else
474 moder_time = (rate - priv->pkt_rate_low) *
475 (priv->rx_usecs_high - priv->rx_usecs_low) /
476 (priv->pkt_rate_high - priv->pkt_rate_low) +
477 priv->rx_usecs_low;
478 }
479 } else {
480 /* When packet rate is low, use default moderation rather than
481 * 0 to prevent interrupt storms if traffic suddenly increases */
482 moder_time = priv->rx_usecs;
483 }
484
485 mlx4_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
486 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
487
488 mlx4_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
489 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
490 priv->last_moder_time, moder_time, period, packets,
491 avg_pkt_size, rate);
492
493 if (moder_time != priv->last_moder_time) {
494 priv->last_moder_time = moder_time;
495 for (i = 0; i < priv->rx_ring_num; i++) {
496 cq = &priv->rx_cq[i];
497 cq->moder_time = moder_time;
498 err = mlx4_en_set_cq_moder(priv, cq);
499 if (err) {
500 mlx4_err(mdev, "Failed modifying moderation for cq:%d "
501 "on port:%d\n", i, priv->port);
502 break;
503 }
504 }
505 }
506
507 out:
508 priv->last_moder_packets = rx_packets;
509 priv->last_moder_tx_packets = tx_packets;
510 priv->last_moder_bytes = rx_bytes;
511 priv->last_moder_jiffies = jiffies;
512 }
513
514 static void mlx4_en_do_get_stats(struct work_struct *work)
515 {
516 struct delayed_work *delay = container_of(work, struct delayed_work, work);
517 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
518 stats_task);
519 struct mlx4_en_dev *mdev = priv->mdev;
520 int err;
521
522 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
523 if (err)
524 mlx4_dbg(HW, priv, "Could not update stats for "
525 "port:%d\n", priv->port);
526
527 mutex_lock(&mdev->state_lock);
528 if (mdev->device_up) {
529 if (priv->port_up)
530 mlx4_en_auto_moderation(priv);
531
532 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
533 }
534 mutex_unlock(&mdev->state_lock);
535 }
536
537 static void mlx4_en_linkstate(struct work_struct *work)
538 {
539 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
540 linkstate_task);
541 struct mlx4_en_dev *mdev = priv->mdev;
542 int linkstate = priv->link_state;
543
544 mutex_lock(&mdev->state_lock);
545 /* If observable port state changed set carrier state and
546 * report to system log */
547 if (priv->last_link_state != linkstate) {
548 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
549 if (netif_msg_link(priv))
550 mlx4_info(mdev, "Port %d - link down\n", priv->port);
551 netif_carrier_off(priv->dev);
552 } else {
553 if (netif_msg_link(priv))
554 mlx4_info(mdev, "Port %d - link up\n", priv->port);
555 netif_carrier_on(priv->dev);
556 }
557 }
558 priv->last_link_state = linkstate;
559 mutex_unlock(&mdev->state_lock);
560 }
561
562
563 static int mlx4_en_start_port(struct net_device *dev)
564 {
565 struct mlx4_en_priv *priv = netdev_priv(dev);
566 struct mlx4_en_dev *mdev = priv->mdev;
567 struct mlx4_en_cq *cq;
568 struct mlx4_en_tx_ring *tx_ring;
569 struct mlx4_en_rx_ring *rx_ring;
570 int rx_index = 0;
571 int tx_index = 0;
572 u16 stride;
573 int err = 0;
574 int i;
575 int j;
576
577 if (priv->port_up) {
578 mlx4_dbg(DRV, priv, "start port called while port already up\n");
579 return 0;
580 }
581
582 /* Calculate Rx buf size */
583 dev->mtu = min(dev->mtu, priv->max_mtu);
584 mlx4_en_calc_rx_buf(dev);
585 mlx4_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
586 stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
587 DS_SIZE * priv->num_frags);
588 /* Configure rx cq's and rings */
589 for (i = 0; i < priv->rx_ring_num; i++) {
590 cq = &priv->rx_cq[i];
591 rx_ring = &priv->rx_ring[i];
592
593 err = mlx4_en_activate_cq(priv, cq);
594 if (err) {
595 mlx4_err(mdev, "Failed activating Rx CQ\n");
596 goto rx_err;
597 }
598 for (j = 0; j < cq->size; j++)
599 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
600 err = mlx4_en_set_cq_moder(priv, cq);
601 if (err) {
602 mlx4_err(mdev, "Failed setting cq moderation parameters");
603 mlx4_en_deactivate_cq(priv, cq);
604 goto cq_err;
605 }
606 mlx4_en_arm_cq(priv, cq);
607
608 ++rx_index;
609 }
610
611 err = mlx4_en_activate_rx_rings(priv);
612 if (err) {
613 mlx4_err(mdev, "Failed to activate RX rings\n");
614 goto cq_err;
615 }
616
617 err = mlx4_en_config_rss_steer(priv);
618 if (err) {
619 mlx4_err(mdev, "Failed configuring rss steering\n");
620 goto rx_err;
621 }
622
623 /* Configure tx cq's and rings */
624 for (i = 0; i < priv->tx_ring_num; i++) {
625 /* Configure cq */
626 cq = &priv->tx_cq[i];
627 err = mlx4_en_activate_cq(priv, cq);
628 if (err) {
629 mlx4_err(mdev, "Failed allocating Tx CQ\n");
630 goto tx_err;
631 }
632 err = mlx4_en_set_cq_moder(priv, cq);
633 if (err) {
634 mlx4_err(mdev, "Failed setting cq moderation parameters");
635 mlx4_en_deactivate_cq(priv, cq);
636 goto tx_err;
637 }
638 mlx4_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
639 cq->buf->wqe_index = cpu_to_be16(0xffff);
640
641 /* Configure ring */
642 tx_ring = &priv->tx_ring[i];
643 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
644 priv->rx_ring[0].srq.srqn);
645 if (err) {
646 mlx4_err(mdev, "Failed allocating Tx ring\n");
647 mlx4_en_deactivate_cq(priv, cq);
648 goto tx_err;
649 }
650 /* Set initial ownership of all Tx TXBBs to SW (1) */
651 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
652 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
653 ++tx_index;
654 }
655
656 /* Configure port */
657 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
658 priv->rx_skb_size + ETH_FCS_LEN,
659 priv->prof->tx_pause,
660 priv->prof->tx_ppp,
661 priv->prof->rx_pause,
662 priv->prof->rx_ppp);
663 if (err) {
664 mlx4_err(mdev, "Failed setting port general configurations"
665 " for port %d, with error %d\n", priv->port, err);
666 goto tx_err;
667 }
668 /* Set default qp number */
669 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
670 if (err) {
671 mlx4_err(mdev, "Failed setting default qp numbers\n");
672 goto tx_err;
673 }
674 /* Set port mac number */
675 mlx4_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
676 err = mlx4_register_mac(mdev->dev, priv->port,
677 priv->mac, &priv->mac_index);
678 if (err) {
679 mlx4_err(mdev, "Failed setting port mac\n");
680 goto tx_err;
681 }
682
683 /* Init port */
684 mlx4_dbg(HW, priv, "Initializing port\n");
685 err = mlx4_INIT_PORT(mdev->dev, priv->port);
686 if (err) {
687 mlx4_err(mdev, "Failed Initializing port\n");
688 goto mac_err;
689 }
690
691 /* Schedule multicast task to populate multicast list */
692 queue_work(mdev->workqueue, &priv->mcast_task);
693
694 priv->port_up = true;
695 netif_start_queue(dev);
696 return 0;
697
698 mac_err:
699 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
700 tx_err:
701 while (tx_index--) {
702 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
703 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
704 }
705
706 mlx4_en_release_rss_steer(priv);
707 rx_err:
708 for (i = 0; i < priv->rx_ring_num; i++)
709 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
710 cq_err:
711 while (rx_index--)
712 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
713
714 return err; /* need to close devices */
715 }
716
717
718 static void mlx4_en_stop_port(struct net_device *dev)
719 {
720 struct mlx4_en_priv *priv = netdev_priv(dev);
721 struct mlx4_en_dev *mdev = priv->mdev;
722 int i;
723
724 if (!priv->port_up) {
725 mlx4_dbg(DRV, priv, "stop port (%d) called while port already down\n",
726 priv->port);
727 return;
728 }
729 netif_stop_queue(dev);
730
731 /* Synchronize with tx routine */
732 netif_tx_lock_bh(dev);
733 priv->port_up = false;
734 netif_tx_unlock_bh(dev);
735
736 /* close port*/
737 mlx4_CLOSE_PORT(mdev->dev, priv->port);
738
739 /* Unregister Mac address for the port */
740 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
741
742 /* Free TX Rings */
743 for (i = 0; i < priv->tx_ring_num; i++) {
744 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
745 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
746 }
747 msleep(10);
748
749 for (i = 0; i < priv->tx_ring_num; i++)
750 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
751
752 /* Free RSS qps */
753 mlx4_en_release_rss_steer(priv);
754
755 /* Free RX Rings */
756 for (i = 0; i < priv->rx_ring_num; i++) {
757 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
758 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
759 msleep(1);
760 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
761 }
762 }
763
764 static void mlx4_en_restart(struct work_struct *work)
765 {
766 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
767 watchdog_task);
768 struct mlx4_en_dev *mdev = priv->mdev;
769 struct net_device *dev = priv->dev;
770
771 mlx4_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
772 mlx4_en_stop_port(dev);
773 if (mlx4_en_start_port(dev))
774 mlx4_err(mdev, "Failed restarting port %d\n", priv->port);
775 }
776
777
778 static int mlx4_en_open(struct net_device *dev)
779 {
780 struct mlx4_en_priv *priv = netdev_priv(dev);
781 struct mlx4_en_dev *mdev = priv->mdev;
782 int i;
783 int err = 0;
784
785 mutex_lock(&mdev->state_lock);
786
787 if (!mdev->device_up) {
788 mlx4_err(mdev, "Cannot open - device down/disabled\n");
789 err = -EBUSY;
790 goto out;
791 }
792
793 /* Reset HW statistics and performance counters */
794 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
795 mlx4_dbg(HW, priv, "Failed dumping statistics\n");
796
797 memset(&priv->stats, 0, sizeof(priv->stats));
798 memset(&priv->pstats, 0, sizeof(priv->pstats));
799
800 for (i = 0; i < priv->tx_ring_num; i++) {
801 priv->tx_ring[i].bytes = 0;
802 priv->tx_ring[i].packets = 0;
803 }
804 for (i = 0; i < priv->rx_ring_num; i++) {
805 priv->rx_ring[i].bytes = 0;
806 priv->rx_ring[i].packets = 0;
807 }
808
809 mlx4_en_set_default_moderation(priv);
810 err = mlx4_en_start_port(dev);
811 if (err)
812 mlx4_err(mdev, "Failed starting port:%d\n", priv->port);
813
814 out:
815 mutex_unlock(&mdev->state_lock);
816 return err;
817 }
818
819
820 static int mlx4_en_close(struct net_device *dev)
821 {
822 struct mlx4_en_priv *priv = netdev_priv(dev);
823 struct mlx4_en_dev *mdev = priv->mdev;
824
825 if (netif_msg_ifdown(priv))
826 mlx4_info(mdev, "Close called for port:%d\n", priv->port);
827
828 mutex_lock(&mdev->state_lock);
829
830 mlx4_en_stop_port(dev);
831 netif_carrier_off(dev);
832
833 mutex_unlock(&mdev->state_lock);
834 return 0;
835 }
836
837 static void mlx4_en_free_resources(struct mlx4_en_priv *priv)
838 {
839 int i;
840
841 for (i = 0; i < priv->tx_ring_num; i++) {
842 if (priv->tx_ring[i].tx_info)
843 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
844 if (priv->tx_cq[i].buf)
845 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
846 }
847
848 for (i = 0; i < priv->rx_ring_num; i++) {
849 if (priv->rx_ring[i].rx_info)
850 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
851 if (priv->rx_cq[i].buf)
852 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
853 }
854 }
855
856 static int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
857 {
858 struct mlx4_en_dev *mdev = priv->mdev;
859 struct mlx4_en_port_profile *prof = priv->prof;
860 int i;
861
862 /* Create tx Rings */
863 for (i = 0; i < priv->tx_ring_num; i++) {
864 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
865 prof->tx_ring_size, i, TX))
866 goto err;
867
868 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
869 prof->tx_ring_size, TXBB_SIZE))
870 goto err;
871 }
872
873 /* Create rx Rings */
874 for (i = 0; i < priv->rx_ring_num; i++) {
875 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
876 prof->rx_ring_size, i, RX))
877 goto err;
878
879 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
880 prof->rx_ring_size, priv->stride))
881 goto err;
882 }
883
884 return 0;
885
886 err:
887 mlx4_err(mdev, "Failed to allocate NIC resources\n");
888 return -ENOMEM;
889 }
890
891
892 void mlx4_en_destroy_netdev(struct net_device *dev)
893 {
894 struct mlx4_en_priv *priv = netdev_priv(dev);
895 struct mlx4_en_dev *mdev = priv->mdev;
896
897 mlx4_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
898
899 /* Unregister device - this will close the port if it was up */
900 if (priv->registered)
901 unregister_netdev(dev);
902
903 if (priv->allocated)
904 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
905
906 cancel_delayed_work(&priv->stats_task);
907 cancel_delayed_work(&priv->refill_task);
908 /* flush any pending task for this netdev */
909 flush_workqueue(mdev->workqueue);
910
911 /* Detach the netdev so tasks would not attempt to access it */
912 mutex_lock(&mdev->state_lock);
913 mdev->pndev[priv->port] = NULL;
914 mutex_unlock(&mdev->state_lock);
915
916 mlx4_en_free_resources(priv);
917 free_netdev(dev);
918 }
919
920 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
921 {
922 struct mlx4_en_priv *priv = netdev_priv(dev);
923 struct mlx4_en_dev *mdev = priv->mdev;
924 int err = 0;
925
926 mlx4_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
927 dev->mtu, new_mtu);
928
929 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
930 mlx4_err(mdev, "Bad MTU size:%d.\n", new_mtu);
931 return -EPERM;
932 }
933 dev->mtu = new_mtu;
934
935 if (netif_running(dev)) {
936 mutex_lock(&mdev->state_lock);
937 if (!mdev->device_up) {
938 /* NIC is probably restarting - let watchdog task reset
939 * the port */
940 mlx4_dbg(DRV, priv, "Change MTU called with card down!?\n");
941 } else {
942 mlx4_en_stop_port(dev);
943 mlx4_en_set_default_moderation(priv);
944 err = mlx4_en_start_port(dev);
945 if (err) {
946 mlx4_err(mdev, "Failed restarting port:%d\n",
947 priv->port);
948 queue_work(mdev->workqueue, &priv->watchdog_task);
949 }
950 }
951 mutex_unlock(&mdev->state_lock);
952 }
953 return 0;
954 }
955
956 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
957 struct mlx4_en_port_profile *prof)
958 {
959 struct net_device *dev;
960 struct mlx4_en_priv *priv;
961 int i;
962 int err;
963
964 dev = alloc_etherdev(sizeof(struct mlx4_en_priv));
965 if (dev == NULL) {
966 mlx4_err(mdev, "Net device allocation failed\n");
967 return -ENOMEM;
968 }
969
970 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
971
972 /*
973 * Initialize driver private data
974 */
975
976 priv = netdev_priv(dev);
977 memset(priv, 0, sizeof(struct mlx4_en_priv));
978 priv->dev = dev;
979 priv->mdev = mdev;
980 priv->prof = prof;
981 priv->port = port;
982 priv->port_up = false;
983 priv->rx_csum = 1;
984 priv->flags = prof->flags;
985 priv->tx_ring_num = prof->tx_ring_num;
986 priv->rx_ring_num = prof->rx_ring_num;
987 priv->mc_list = NULL;
988 priv->mac_index = -1;
989 priv->msg_enable = MLX4_EN_MSG_LEVEL;
990 spin_lock_init(&priv->stats_lock);
991 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
992 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
993 INIT_DELAYED_WORK(&priv->refill_task, mlx4_en_rx_refill);
994 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
995 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
996 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
997
998 /* Query for default mac and max mtu */
999 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1000 priv->mac = mdev->dev->caps.def_mac[priv->port];
1001 if (ILLEGAL_MAC(priv->mac)) {
1002 mlx4_err(mdev, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1003 priv->port, priv->mac);
1004 err = -EINVAL;
1005 goto out;
1006 }
1007
1008 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1009 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1010 err = mlx4_en_alloc_resources(priv);
1011 if (err)
1012 goto out;
1013
1014 /* Populate Rx default RSS mappings */
1015 mlx4_en_set_default_rss_map(priv, &priv->rss_map, priv->rx_ring_num *
1016 RSS_FACTOR, priv->rx_ring_num);
1017 /* Allocate page for receive rings */
1018 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1019 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1020 if (err) {
1021 mlx4_err(mdev, "Failed to allocate page for rx qps\n");
1022 goto out;
1023 }
1024 priv->allocated = 1;
1025
1026 /* Populate Tx priority mappings */
1027 mlx4_en_set_prio_map(priv, priv->tx_prio_map, prof->tx_ring_num);
1028
1029 /*
1030 * Initialize netdev entry points
1031 */
1032
1033 dev->open = &mlx4_en_open;
1034 dev->stop = &mlx4_en_close;
1035 dev->hard_start_xmit = &mlx4_en_xmit;
1036 dev->get_stats = &mlx4_en_get_stats;
1037 dev->set_multicast_list = &mlx4_en_set_multicast;
1038 dev->set_mac_address = &mlx4_en_set_mac;
1039 dev->change_mtu = &mlx4_en_change_mtu;
1040 dev->tx_timeout = &mlx4_en_tx_timeout;
1041 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1042 dev->vlan_rx_register = mlx4_en_vlan_rx_register;
1043 dev->vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid;
1044 dev->vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid;
1045 #ifdef CONFIG_NET_POLL_CONTROLLER
1046 dev->poll_controller = mlx4_en_netpoll;
1047 #endif
1048 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1049
1050 /* Set defualt MAC */
1051 dev->addr_len = ETH_ALEN;
1052 for (i = 0; i < ETH_ALEN; i++)
1053 dev->dev_addr[ETH_ALEN - 1 - i] =
1054 (u8) (priv->mac >> (8 * i));
1055
1056 /*
1057 * Set driver features
1058 */
1059 dev->features |= NETIF_F_SG;
1060 dev->features |= NETIF_F_HW_CSUM;
1061 dev->features |= NETIF_F_HIGHDMA;
1062 dev->features |= NETIF_F_HW_VLAN_TX |
1063 NETIF_F_HW_VLAN_RX |
1064 NETIF_F_HW_VLAN_FILTER;
1065 if (mdev->profile.num_lro)
1066 dev->features |= NETIF_F_LRO;
1067 if (mdev->LSO_support) {
1068 dev->features |= NETIF_F_TSO;
1069 dev->features |= NETIF_F_TSO6;
1070 }
1071
1072 mdev->pndev[port] = dev;
1073
1074 netif_carrier_off(dev);
1075 err = register_netdev(dev);
1076 if (err) {
1077 mlx4_err(mdev, "Netdev registration failed\n");
1078 goto out;
1079 }
1080 priv->registered = 1;
1081 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1082 return 0;
1083
1084 out:
1085 mlx4_en_destroy_netdev(dev);
1086 return err;
1087 }
1088
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree