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mlx4_en: Removing reserve vectors
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ethernet / mellanox / mlx4 / en_netdev.c
blob8402982065325300cb31e84dc0cb5d3ba1546ab6
1 /*
2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34 #include <linux/etherdevice.h>
35 #include <linux/tcp.h>
36 #include <linux/if_vlan.h>
37 #include <linux/delay.h>
38 #include <linux/slab.h>
39
40 #include <linux/mlx4/driver.h>
41 #include <linux/mlx4/device.h>
42 #include <linux/mlx4/cmd.h>
43 #include <linux/mlx4/cq.h>
44
45 #include "mlx4_en.h"
46 #include "en_port.h"
47
48 static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
49 {
50 struct mlx4_en_priv *priv = netdev_priv(dev);
51 struct mlx4_en_dev *mdev = priv->mdev;
52 int err;
53 int idx;
54
55 en_dbg(HW, priv, "adding VLAN:%d\n", vid);
56
57 set_bit(vid, priv->active_vlans);
58
59 /* Add VID to port VLAN filter */
60 mutex_lock(&mdev->state_lock);
61 if (mdev->device_up && priv->port_up) {
62 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
63 if (err)
64 en_err(priv, "Failed configuring VLAN filter\n");
65 }
66 if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
67 en_err(priv, "failed adding vlan %d\n", vid);
68 mutex_unlock(&mdev->state_lock);
69
70 }
71
72 static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
73 {
74 struct mlx4_en_priv *priv = netdev_priv(dev);
75 struct mlx4_en_dev *mdev = priv->mdev;
76 int err;
77 int idx;
78
79 en_dbg(HW, priv, "Killing VID:%d\n", vid);
80
81 clear_bit(vid, priv->active_vlans);
82
83 /* Remove VID from port VLAN filter */
84 mutex_lock(&mdev->state_lock);
85 if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
86 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
87 else
88 en_err(priv, "could not find vid %d in cache\n", vid);
89
90 if (mdev->device_up && priv->port_up) {
91 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
92 if (err)
93 en_err(priv, "Failed configuring VLAN filter\n");
94 }
95 mutex_unlock(&mdev->state_lock);
96 }
97
98 u64 mlx4_en_mac_to_u64(u8 *addr)
99 {
100 u64 mac = 0;
101 int i;
102
103 for (i = 0; i < ETH_ALEN; i++) {
104 mac <<= 8;
105 mac |= addr[i];
106 }
107 return mac;
108 }
109
110 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
111 {
112 struct mlx4_en_priv *priv = netdev_priv(dev);
113 struct mlx4_en_dev *mdev = priv->mdev;
114 struct sockaddr *saddr = addr;
115
116 if (!is_valid_ether_addr(saddr->sa_data))
117 return -EADDRNOTAVAIL;
118
119 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
120 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
121 queue_work(mdev->workqueue, &priv->mac_task);
122 return 0;
123 }
124
125 static void mlx4_en_do_set_mac(struct work_struct *work)
126 {
127 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
128 mac_task);
129 struct mlx4_en_dev *mdev = priv->mdev;
130 int err = 0;
131
132 mutex_lock(&mdev->state_lock);
133 if (priv->port_up) {
134 /* Remove old MAC and insert the new one */
135 err = mlx4_replace_mac(mdev->dev, priv->port,
136 priv->base_qpn, priv->mac, 0);
137 if (err)
138 en_err(priv, "Failed changing HW MAC address\n");
139 } else
140 en_dbg(HW, priv, "Port is down while "
141 "registering mac, exiting...\n");
142
143 mutex_unlock(&mdev->state_lock);
144 }
145
146 static void mlx4_en_clear_list(struct net_device *dev)
147 {
148 struct mlx4_en_priv *priv = netdev_priv(dev);
149
150 kfree(priv->mc_addrs);
151 priv->mc_addrs_cnt = 0;
152 }
153
154 static void mlx4_en_cache_mclist(struct net_device *dev)
155 {
156 struct mlx4_en_priv *priv = netdev_priv(dev);
157 struct netdev_hw_addr *ha;
158 char *mc_addrs;
159 int mc_addrs_cnt = netdev_mc_count(dev);
160 int i;
161
162 mc_addrs = kmalloc(mc_addrs_cnt * ETH_ALEN, GFP_ATOMIC);
163 if (!mc_addrs) {
164 en_err(priv, "failed to allocate multicast list\n");
165 return;
166 }
167 i = 0;
168 netdev_for_each_mc_addr(ha, dev)
169 memcpy(mc_addrs + i++ * ETH_ALEN, ha->addr, ETH_ALEN);
170 priv->mc_addrs = mc_addrs;
171 priv->mc_addrs_cnt = mc_addrs_cnt;
172 }
173
174
175 static void mlx4_en_set_multicast(struct net_device *dev)
176 {
177 struct mlx4_en_priv *priv = netdev_priv(dev);
178
179 if (!priv->port_up)
180 return;
181
182 queue_work(priv->mdev->workqueue, &priv->mcast_task);
183 }
184
185 static void mlx4_en_do_set_multicast(struct work_struct *work)
186 {
187 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
188 mcast_task);
189 struct mlx4_en_dev *mdev = priv->mdev;
190 struct net_device *dev = priv->dev;
191 u64 mcast_addr = 0;
192 u8 mc_list[16] = {0};
193 int err;
194
195 mutex_lock(&mdev->state_lock);
196 if (!mdev->device_up) {
197 en_dbg(HW, priv, "Card is not up, "
198 "ignoring multicast change.\n");
199 goto out;
200 }
201 if (!priv->port_up) {
202 en_dbg(HW, priv, "Port is down, "
203 "ignoring multicast change.\n");
204 goto out;
205 }
206
207 /*
208 * Promsicuous mode: disable all filters
209 */
210
211 if (dev->flags & IFF_PROMISC) {
212 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
213 if (netif_msg_rx_status(priv))
214 en_warn(priv, "Entering promiscuous mode\n");
215 priv->flags |= MLX4_EN_FLAG_PROMISC;
216
217 /* Enable promiscouos mode */
218 if (!(mdev->dev->caps.flags &
219 MLX4_DEV_CAP_FLAG_VEP_UC_STEER))
220 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
221 priv->base_qpn, 1);
222 else
223 err = mlx4_unicast_promisc_add(mdev->dev, priv->base_qpn,
224 priv->port);
225 if (err)
226 en_err(priv, "Failed enabling "
227 "promiscuous mode\n");
228
229 /* Disable port multicast filter (unconditionally) */
230 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
231 0, MLX4_MCAST_DISABLE);
232 if (err)
233 en_err(priv, "Failed disabling "
234 "multicast filter\n");
235
236 /* Add the default qp number as multicast promisc */
237 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
238 err = mlx4_multicast_promisc_add(mdev->dev, priv->base_qpn,
239 priv->port);
240 if (err)
241 en_err(priv, "Failed entering multicast promisc mode\n");
242 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
243 }
244
245 /* Disable port VLAN filter */
246 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
247 if (err)
248 en_err(priv, "Failed disabling VLAN filter\n");
249 }
250 goto out;
251 }
252
253 /*
254 * Not in promiscuous mode
255 */
256
257 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
258 if (netif_msg_rx_status(priv))
259 en_warn(priv, "Leaving promiscuous mode\n");
260 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
261
262 /* Disable promiscouos mode */
263 if (!(mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))
264 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
265 priv->base_qpn, 0);
266 else
267 err = mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
268 priv->port);
269 if (err)
270 en_err(priv, "Failed disabling promiscuous mode\n");
271
272 /* Disable Multicast promisc */
273 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
274 err = mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
275 priv->port);
276 if (err)
277 en_err(priv, "Failed disabling multicast promiscuous mode\n");
278 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
279 }
280
281 /* Enable port VLAN filter */
282 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
283 if (err)
284 en_err(priv, "Failed enabling VLAN filter\n");
285 }
286
287 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
288 if (dev->flags & IFF_ALLMULTI) {
289 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
290 0, MLX4_MCAST_DISABLE);
291 if (err)
292 en_err(priv, "Failed disabling multicast filter\n");
293
294 /* Add the default qp number as multicast promisc */
295 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
296 err = mlx4_multicast_promisc_add(mdev->dev, priv->base_qpn,
297 priv->port);
298 if (err)
299 en_err(priv, "Failed entering multicast promisc mode\n");
300 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
301 }
302 } else {
303 int i;
304 /* Disable Multicast promisc */
305 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
306 err = mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
307 priv->port);
308 if (err)
309 en_err(priv, "Failed disabling multicast promiscuous mode\n");
310 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
311 }
312
313 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
314 0, MLX4_MCAST_DISABLE);
315 if (err)
316 en_err(priv, "Failed disabling multicast filter\n");
317
318 /* Detach our qp from all the multicast addresses */
319 for (i = 0; i < priv->mc_addrs_cnt; i++) {
320 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
321 mc_list[5] = priv->port;
322 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
323 mc_list, MLX4_PROT_ETH);
324 }
325 /* Flush mcast filter and init it with broadcast address */
326 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
327 1, MLX4_MCAST_CONFIG);
328
329 /* Update multicast list - we cache all addresses so they won't
330 * change while HW is updated holding the command semaphor */
331 netif_tx_lock_bh(dev);
332 mlx4_en_cache_mclist(dev);
333 netif_tx_unlock_bh(dev);
334 for (i = 0; i < priv->mc_addrs_cnt; i++) {
335 mcast_addr =
336 mlx4_en_mac_to_u64(priv->mc_addrs + i * ETH_ALEN);
337 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
338 mc_list[5] = priv->port;
339 mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp,
340 mc_list, 0, MLX4_PROT_ETH);
341 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
342 mcast_addr, 0, MLX4_MCAST_CONFIG);
343 }
344 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
345 0, MLX4_MCAST_ENABLE);
346 if (err)
347 en_err(priv, "Failed enabling multicast filter\n");
348 }
349 out:
350 mutex_unlock(&mdev->state_lock);
351 }
352
353 #ifdef CONFIG_NET_POLL_CONTROLLER
354 static void mlx4_en_netpoll(struct net_device *dev)
355 {
356 struct mlx4_en_priv *priv = netdev_priv(dev);
357 struct mlx4_en_cq *cq;
358 unsigned long flags;
359 int i;
360
361 for (i = 0; i < priv->rx_ring_num; i++) {
362 cq = &priv->rx_cq[i];
363 spin_lock_irqsave(&cq->lock, flags);
364 napi_synchronize(&cq->napi);
365 mlx4_en_process_rx_cq(dev, cq, 0);
366 spin_unlock_irqrestore(&cq->lock, flags);
367 }
368 }
369 #endif
370
371 static void mlx4_en_tx_timeout(struct net_device *dev)
372 {
373 struct mlx4_en_priv *priv = netdev_priv(dev);
374 struct mlx4_en_dev *mdev = priv->mdev;
375
376 if (netif_msg_timer(priv))
377 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
378
379 priv->port_stats.tx_timeout++;
380 en_dbg(DRV, priv, "Scheduling watchdog\n");
381 queue_work(mdev->workqueue, &priv->watchdog_task);
382 }
383
384
385 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
386 {
387 struct mlx4_en_priv *priv = netdev_priv(dev);
388
389 spin_lock_bh(&priv->stats_lock);
390 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
391 spin_unlock_bh(&priv->stats_lock);
392
393 return &priv->ret_stats;
394 }
395
396 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
397 {
398 struct mlx4_en_cq *cq;
399 int i;
400
401 /* If we haven't received a specific coalescing setting
402 * (module param), we set the moderation parameters as follows:
403 * - moder_cnt is set to the number of mtu sized packets to
404 * satisfy our coelsing target.
405 * - moder_time is set to a fixed value.
406 */
407 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
408 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
409 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
410 "rx_frames:%d rx_usecs:%d\n",
411 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
412
413 /* Setup cq moderation params */
414 for (i = 0; i < priv->rx_ring_num; i++) {
415 cq = &priv->rx_cq[i];
416 cq->moder_cnt = priv->rx_frames;
417 cq->moder_time = priv->rx_usecs;
418 }
419
420 for (i = 0; i < priv->tx_ring_num; i++) {
421 cq = &priv->tx_cq[i];
422 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
423 cq->moder_time = MLX4_EN_TX_COAL_TIME;
424 }
425
426 /* Reset auto-moderation params */
427 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
428 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
429 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
430 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
431 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
432 priv->adaptive_rx_coal = 1;
433 priv->last_moder_time = MLX4_EN_AUTO_CONF;
434 priv->last_moder_jiffies = 0;
435 priv->last_moder_packets = 0;
436 priv->last_moder_tx_packets = 0;
437 priv->last_moder_bytes = 0;
438 }
439
440 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
441 {
442 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
443 struct mlx4_en_cq *cq;
444 unsigned long packets;
445 unsigned long rate;
446 unsigned long avg_pkt_size;
447 unsigned long rx_packets;
448 unsigned long rx_bytes;
449 unsigned long tx_packets;
450 unsigned long tx_pkt_diff;
451 unsigned long rx_pkt_diff;
452 int moder_time;
453 int i, err;
454
455 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
456 return;
457
458 spin_lock_bh(&priv->stats_lock);
459 rx_packets = priv->stats.rx_packets;
460 rx_bytes = priv->stats.rx_bytes;
461 tx_packets = priv->stats.tx_packets;
462 spin_unlock_bh(&priv->stats_lock);
463
464 if (!priv->last_moder_jiffies || !period)
465 goto out;
466
467 tx_pkt_diff = ((unsigned long) (tx_packets -
468 priv->last_moder_tx_packets));
469 rx_pkt_diff = ((unsigned long) (rx_packets -
470 priv->last_moder_packets));
471 packets = max(tx_pkt_diff, rx_pkt_diff);
472 rate = packets * HZ / period;
473 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
474 priv->last_moder_bytes)) / packets : 0;
475
476 /* Apply auto-moderation only when packet rate exceeds a rate that
477 * it matters */
478 if (rate > MLX4_EN_RX_RATE_THRESH && avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
479 /* If tx and rx packet rates are not balanced, assume that
480 * traffic is mainly BW bound and apply maximum moderation.
481 * Otherwise, moderate according to packet rate */
482 if (2 * tx_pkt_diff > 3 * rx_pkt_diff ||
483 2 * rx_pkt_diff > 3 * tx_pkt_diff) {
484 moder_time = priv->rx_usecs_high;
485 } else {
486 if (rate < priv->pkt_rate_low)
487 moder_time = priv->rx_usecs_low;
488 else if (rate > priv->pkt_rate_high)
489 moder_time = priv->rx_usecs_high;
490 else
491 moder_time = (rate - priv->pkt_rate_low) *
492 (priv->rx_usecs_high - priv->rx_usecs_low) /
493 (priv->pkt_rate_high - priv->pkt_rate_low) +
494 priv->rx_usecs_low;
495 }
496 } else {
497 moder_time = priv->rx_usecs_low;
498 }
499
500 en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
501 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
502
503 en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
504 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
505 priv->last_moder_time, moder_time, period, packets,
506 avg_pkt_size, rate);
507
508 if (moder_time != priv->last_moder_time) {
509 priv->last_moder_time = moder_time;
510 for (i = 0; i < priv->rx_ring_num; i++) {
511 cq = &priv->rx_cq[i];
512 cq->moder_time = moder_time;
513 err = mlx4_en_set_cq_moder(priv, cq);
514 if (err) {
515 en_err(priv, "Failed modifying moderation for cq:%d\n", i);
516 break;
517 }
518 }
519 }
520
521 out:
522 priv->last_moder_packets = rx_packets;
523 priv->last_moder_tx_packets = tx_packets;
524 priv->last_moder_bytes = rx_bytes;
525 priv->last_moder_jiffies = jiffies;
526 }
527
528 static void mlx4_en_do_get_stats(struct work_struct *work)
529 {
530 struct delayed_work *delay = to_delayed_work(work);
531 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
532 stats_task);
533 struct mlx4_en_dev *mdev = priv->mdev;
534 int err;
535
536 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
537 if (err)
538 en_dbg(HW, priv, "Could not update stats\n");
539
540 mutex_lock(&mdev->state_lock);
541 if (mdev->device_up) {
542 if (priv->port_up)
543 mlx4_en_auto_moderation(priv);
544
545 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
546 }
547 if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
548 queue_work(mdev->workqueue, &priv->mac_task);
549 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
550 }
551 mutex_unlock(&mdev->state_lock);
552 }
553
554 static void mlx4_en_linkstate(struct work_struct *work)
555 {
556 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
557 linkstate_task);
558 struct mlx4_en_dev *mdev = priv->mdev;
559 int linkstate = priv->link_state;
560
561 mutex_lock(&mdev->state_lock);
562 /* If observable port state changed set carrier state and
563 * report to system log */
564 if (priv->last_link_state != linkstate) {
565 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
566 en_info(priv, "Link Down\n");
567 netif_carrier_off(priv->dev);
568 } else {
569 en_info(priv, "Link Up\n");
570 netif_carrier_on(priv->dev);
571 }
572 }
573 priv->last_link_state = linkstate;
574 mutex_unlock(&mdev->state_lock);
575 }
576
577
578 int mlx4_en_start_port(struct net_device *dev)
579 {
580 struct mlx4_en_priv *priv = netdev_priv(dev);
581 struct mlx4_en_dev *mdev = priv->mdev;
582 struct mlx4_en_cq *cq;
583 struct mlx4_en_tx_ring *tx_ring;
584 int rx_index = 0;
585 int tx_index = 0;
586 int err = 0;
587 int i;
588 int j;
589 u8 mc_list[16] = {0};
590
591 if (priv->port_up) {
592 en_dbg(DRV, priv, "start port called while port already up\n");
593 return 0;
594 }
595
596 /* Calculate Rx buf size */
597 dev->mtu = min(dev->mtu, priv->max_mtu);
598 mlx4_en_calc_rx_buf(dev);
599 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
600
601 /* Configure rx cq's and rings */
602 err = mlx4_en_activate_rx_rings(priv);
603 if (err) {
604 en_err(priv, "Failed to activate RX rings\n");
605 return err;
606 }
607 for (i = 0; i < priv->rx_ring_num; i++) {
608 cq = &priv->rx_cq[i];
609
610 err = mlx4_en_activate_cq(priv, cq, i);
611 if (err) {
612 en_err(priv, "Failed activating Rx CQ\n");
613 goto cq_err;
614 }
615 for (j = 0; j < cq->size; j++)
616 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
617 err = mlx4_en_set_cq_moder(priv, cq);
618 if (err) {
619 en_err(priv, "Failed setting cq moderation parameters");
620 mlx4_en_deactivate_cq(priv, cq);
621 goto cq_err;
622 }
623 mlx4_en_arm_cq(priv, cq);
624 priv->rx_ring[i].cqn = cq->mcq.cqn;
625 ++rx_index;
626 }
627
628 /* Set port mac number */
629 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
630 err = mlx4_register_mac(mdev->dev, priv->port,
631 priv->mac, &priv->base_qpn, 0);
632 if (err) {
633 en_err(priv, "Failed setting port mac\n");
634 goto cq_err;
635 }
636 mdev->mac_removed[priv->port] = 0;
637
638 err = mlx4_en_config_rss_steer(priv);
639 if (err) {
640 en_err(priv, "Failed configuring rss steering\n");
641 goto mac_err;
642 }
643
644 /* Configure tx cq's and rings */
645 for (i = 0; i < priv->tx_ring_num; i++) {
646 /* Configure cq */
647 cq = &priv->tx_cq[i];
648 err = mlx4_en_activate_cq(priv, cq, i);
649 if (err) {
650 en_err(priv, "Failed allocating Tx CQ\n");
651 goto tx_err;
652 }
653 err = mlx4_en_set_cq_moder(priv, cq);
654 if (err) {
655 en_err(priv, "Failed setting cq moderation parameters");
656 mlx4_en_deactivate_cq(priv, cq);
657 goto tx_err;
658 }
659 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
660 cq->buf->wqe_index = cpu_to_be16(0xffff);
661
662 /* Configure ring */
663 tx_ring = &priv->tx_ring[i];
664 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn);
665 if (err) {
666 en_err(priv, "Failed allocating Tx ring\n");
667 mlx4_en_deactivate_cq(priv, cq);
668 goto tx_err;
669 }
670 /* Set initial ownership of all Tx TXBBs to SW (1) */
671 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
672 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
673 ++tx_index;
674 }
675
676 /* Configure port */
677 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
678 priv->rx_skb_size + ETH_FCS_LEN,
679 priv->prof->tx_pause,
680 priv->prof->tx_ppp,
681 priv->prof->rx_pause,
682 priv->prof->rx_ppp);
683 if (err) {
684 en_err(priv, "Failed setting port general configurations "
685 "for port %d, with error %d\n", priv->port, err);
686 goto tx_err;
687 }
688 /* Set default qp number */
689 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
690 if (err) {
691 en_err(priv, "Failed setting default qp numbers\n");
692 goto tx_err;
693 }
694
695 /* Init port */
696 en_dbg(HW, priv, "Initializing port\n");
697 err = mlx4_INIT_PORT(mdev->dev, priv->port);
698 if (err) {
699 en_err(priv, "Failed Initializing port\n");
700 goto tx_err;
701 }
702
703 /* Attach rx QP to bradcast address */
704 memset(&mc_list[10], 0xff, ETH_ALEN);
705 mc_list[5] = priv->port;
706 if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
707 0, MLX4_PROT_ETH))
708 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
709
710 /* Must redo promiscuous mode setup. */
711 priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
712
713 /* Schedule multicast task to populate multicast list */
714 queue_work(mdev->workqueue, &priv->mcast_task);
715
716 priv->port_up = true;
717 netif_tx_start_all_queues(dev);
718 return 0;
719
720 tx_err:
721 while (tx_index--) {
722 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
723 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
724 }
725
726 mlx4_en_release_rss_steer(priv);
727 mac_err:
728 mlx4_unregister_mac(mdev->dev, priv->port, priv->base_qpn);
729 cq_err:
730 while (rx_index--)
731 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
732 for (i = 0; i < priv->rx_ring_num; i++)
733 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
734
735 return err; /* need to close devices */
736 }
737
738
739 void mlx4_en_stop_port(struct net_device *dev)
740 {
741 struct mlx4_en_priv *priv = netdev_priv(dev);
742 struct mlx4_en_dev *mdev = priv->mdev;
743 int i;
744 u8 mc_list[16] = {0};
745
746 if (!priv->port_up) {
747 en_dbg(DRV, priv, "stop port called while port already down\n");
748 return;
749 }
750
751 /* Synchronize with tx routine */
752 netif_tx_lock_bh(dev);
753 netif_tx_stop_all_queues(dev);
754 netif_tx_unlock_bh(dev);
755
756 /* Set port as not active */
757 priv->port_up = false;
758
759 /* Detach All multicasts */
760 memset(&mc_list[10], 0xff, ETH_ALEN);
761 mc_list[5] = priv->port;
762 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
763 MLX4_PROT_ETH);
764 for (i = 0; i < priv->mc_addrs_cnt; i++) {
765 memcpy(&mc_list[10], priv->mc_addrs + i * ETH_ALEN, ETH_ALEN);
766 mc_list[5] = priv->port;
767 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
768 mc_list, MLX4_PROT_ETH);
769 }
770 mlx4_en_clear_list(dev);
771 /* Flush multicast filter */
772 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
773
774 /* Unregister Mac address for the port */
775 mlx4_unregister_mac(mdev->dev, priv->port, priv->base_qpn);
776 mdev->mac_removed[priv->port] = 1;
777
778 /* Free TX Rings */
779 for (i = 0; i < priv->tx_ring_num; i++) {
780 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
781 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
782 }
783 msleep(10);
784
785 for (i = 0; i < priv->tx_ring_num; i++)
786 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
787
788 /* Free RSS qps */
789 mlx4_en_release_rss_steer(priv);
790
791 /* Free RX Rings */
792 for (i = 0; i < priv->rx_ring_num; i++) {
793 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
794 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
795 msleep(1);
796 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
797 }
798
799 /* close port*/
800 mlx4_CLOSE_PORT(mdev->dev, priv->port);
801 }
802
803 static void mlx4_en_restart(struct work_struct *work)
804 {
805 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
806 watchdog_task);
807 struct mlx4_en_dev *mdev = priv->mdev;
808 struct net_device *dev = priv->dev;
809
810 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
811
812 mutex_lock(&mdev->state_lock);
813 if (priv->port_up) {
814 mlx4_en_stop_port(dev);
815 if (mlx4_en_start_port(dev))
816 en_err(priv, "Failed restarting port %d\n", priv->port);
817 }
818 mutex_unlock(&mdev->state_lock);
819 }
820
821
822 static int mlx4_en_open(struct net_device *dev)
823 {
824 struct mlx4_en_priv *priv = netdev_priv(dev);
825 struct mlx4_en_dev *mdev = priv->mdev;
826 int i;
827 int err = 0;
828
829 mutex_lock(&mdev->state_lock);
830
831 if (!mdev->device_up) {
832 en_err(priv, "Cannot open - device down/disabled\n");
833 err = -EBUSY;
834 goto out;
835 }
836
837 /* Reset HW statistics and performance counters */
838 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
839 en_dbg(HW, priv, "Failed dumping statistics\n");
840
841 memset(&priv->stats, 0, sizeof(priv->stats));
842 memset(&priv->pstats, 0, sizeof(priv->pstats));
843
844 for (i = 0; i < priv->tx_ring_num; i++) {
845 priv->tx_ring[i].bytes = 0;
846 priv->tx_ring[i].packets = 0;
847 }
848 for (i = 0; i < priv->rx_ring_num; i++) {
849 priv->rx_ring[i].bytes = 0;
850 priv->rx_ring[i].packets = 0;
851 }
852
853 err = mlx4_en_start_port(dev);
854 if (err)
855 en_err(priv, "Failed starting port:%d\n", priv->port);
856
857 out:
858 mutex_unlock(&mdev->state_lock);
859 return err;
860 }
861
862
863 static int mlx4_en_close(struct net_device *dev)
864 {
865 struct mlx4_en_priv *priv = netdev_priv(dev);
866 struct mlx4_en_dev *mdev = priv->mdev;
867
868 en_dbg(IFDOWN, priv, "Close port called\n");
869
870 mutex_lock(&mdev->state_lock);
871
872 mlx4_en_stop_port(dev);
873 netif_carrier_off(dev);
874
875 mutex_unlock(&mdev->state_lock);
876 return 0;
877 }
878
879 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
880 {
881 int i;
882
883 for (i = 0; i < priv->tx_ring_num; i++) {
884 if (priv->tx_ring[i].tx_info)
885 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
886 if (priv->tx_cq[i].buf)
887 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
888 }
889
890 for (i = 0; i < priv->rx_ring_num; i++) {
891 if (priv->rx_ring[i].rx_info)
892 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
893 if (priv->rx_cq[i].buf)
894 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
895 }
896 }
897
898 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
899 {
900 struct mlx4_en_port_profile *prof = priv->prof;
901 int i;
902 int base_tx_qpn, err;
903
904 err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &base_tx_qpn);
905 if (err) {
906 en_err(priv, "failed reserving range for TX rings\n");
907 return err;
908 }
909
910 /* Create tx Rings */
911 for (i = 0; i < priv->tx_ring_num; i++) {
912 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
913 prof->tx_ring_size, i, TX))
914 goto err;
915
916 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], base_tx_qpn + i,
917 prof->tx_ring_size, TXBB_SIZE))
918 goto err;
919 }
920
921 /* Create rx Rings */
922 for (i = 0; i < priv->rx_ring_num; i++) {
923 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
924 prof->rx_ring_size, i, RX))
925 goto err;
926
927 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
928 prof->rx_ring_size, priv->stride))
929 goto err;
930 }
931
932 return 0;
933
934 err:
935 en_err(priv, "Failed to allocate NIC resources\n");
936 mlx4_qp_release_range(priv->mdev->dev, base_tx_qpn, priv->tx_ring_num);
937 return -ENOMEM;
938 }
939
940
941 void mlx4_en_destroy_netdev(struct net_device *dev)
942 {
943 struct mlx4_en_priv *priv = netdev_priv(dev);
944 struct mlx4_en_dev *mdev = priv->mdev;
945
946 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
947
948 /* Unregister device - this will close the port if it was up */
949 if (priv->registered)
950 unregister_netdev(dev);
951
952 if (priv->allocated)
953 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
954
955 cancel_delayed_work(&priv->stats_task);
956 /* flush any pending task for this netdev */
957 flush_workqueue(mdev->workqueue);
958
959 /* Detach the netdev so tasks would not attempt to access it */
960 mutex_lock(&mdev->state_lock);
961 mdev->pndev[priv->port] = NULL;
962 mutex_unlock(&mdev->state_lock);
963
964 mlx4_en_free_resources(priv);
965 free_netdev(dev);
966 }
967
968 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
969 {
970 struct mlx4_en_priv *priv = netdev_priv(dev);
971 struct mlx4_en_dev *mdev = priv->mdev;
972 int err = 0;
973
974 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
975 dev->mtu, new_mtu);
976
977 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
978 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
979 return -EPERM;
980 }
981 dev->mtu = new_mtu;
982
983 if (netif_running(dev)) {
984 mutex_lock(&mdev->state_lock);
985 if (!mdev->device_up) {
986 /* NIC is probably restarting - let watchdog task reset
987 * the port */
988 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
989 } else {
990 mlx4_en_stop_port(dev);
991 err = mlx4_en_start_port(dev);
992 if (err) {
993 en_err(priv, "Failed restarting port:%d\n",
994 priv->port);
995 queue_work(mdev->workqueue, &priv->watchdog_task);
996 }
997 }
998 mutex_unlock(&mdev->state_lock);
999 }
1000 return 0;
1001 }
1002
1003 static const struct net_device_ops mlx4_netdev_ops = {
1004 .ndo_open = mlx4_en_open,
1005 .ndo_stop = mlx4_en_close,
1006 .ndo_start_xmit = mlx4_en_xmit,
1007 .ndo_select_queue = mlx4_en_select_queue,
1008 .ndo_get_stats = mlx4_en_get_stats,
1009 .ndo_set_rx_mode = mlx4_en_set_multicast,
1010 .ndo_set_mac_address = mlx4_en_set_mac,
1011 .ndo_validate_addr = eth_validate_addr,
1012 .ndo_change_mtu = mlx4_en_change_mtu,
1013 .ndo_tx_timeout = mlx4_en_tx_timeout,
1014 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
1015 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
1016 #ifdef CONFIG_NET_POLL_CONTROLLER
1017 .ndo_poll_controller = mlx4_en_netpoll,
1018 #endif
1019 };
1020
1021 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
1022 struct mlx4_en_port_profile *prof)
1023 {
1024 struct net_device *dev;
1025 struct mlx4_en_priv *priv;
1026 int i;
1027 int err;
1028
1029 dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1030 prof->tx_ring_num, prof->rx_ring_num);
1031 if (dev == NULL) {
1032 mlx4_err(mdev, "Net device allocation failed\n");
1033 return -ENOMEM;
1034 }
1035
1036 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1037 dev->dev_id = port - 1;
1038
1039 /*
1040 * Initialize driver private data
1041 */
1042
1043 priv = netdev_priv(dev);
1044 memset(priv, 0, sizeof(struct mlx4_en_priv));
1045 priv->dev = dev;
1046 priv->mdev = mdev;
1047 priv->prof = prof;
1048 priv->port = port;
1049 priv->port_up = false;
1050 priv->flags = prof->flags;
1051 priv->tx_ring_num = prof->tx_ring_num;
1052 priv->rx_ring_num = prof->rx_ring_num;
1053 priv->mac_index = -1;
1054 priv->msg_enable = MLX4_EN_MSG_LEVEL;
1055 spin_lock_init(&priv->stats_lock);
1056 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1057 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1058 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1059 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1060 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1061
1062 /* Query for default mac and max mtu */
1063 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1064 priv->mac = mdev->dev->caps.def_mac[priv->port];
1065 if (ILLEGAL_MAC(priv->mac)) {
1066 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1067 priv->port, priv->mac);
1068 err = -EINVAL;
1069 goto out;
1070 }
1071
1072 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1073 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1074 err = mlx4_en_alloc_resources(priv);
1075 if (err)
1076 goto out;
1077
1078 /* Allocate page for receive rings */
1079 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1080 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1081 if (err) {
1082 en_err(priv, "Failed to allocate page for rx qps\n");
1083 goto out;
1084 }
1085 priv->allocated = 1;
1086
1087 /*
1088 * Initialize netdev entry points
1089 */
1090 dev->netdev_ops = &mlx4_netdev_ops;
1091 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1092 netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1093 netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1094
1095 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1096
1097 /* Set defualt MAC */
1098 dev->addr_len = ETH_ALEN;
1099 for (i = 0; i < ETH_ALEN; i++) {
1100 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1101 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1102 }
1103
1104 /*
1105 * Set driver features
1106 */
1107 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1108 if (mdev->LSO_support)
1109 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1110
1111 dev->vlan_features = dev->hw_features;
1112
1113 dev->hw_features |= NETIF_F_RXCSUM;
1114 dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1115 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1116 NETIF_F_HW_VLAN_FILTER;
1117
1118 mdev->pndev[port] = dev;
1119
1120 netif_carrier_off(dev);
1121 err = register_netdev(dev);
1122 if (err) {
1123 en_err(priv, "Netdev registration failed for port %d\n", port);
1124 goto out;
1125 }
1126
1127 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1128 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1129
1130 /* Configure port */
1131 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1132 MLX4_EN_MIN_MTU,
1133 0, 0, 0, 0);
1134 if (err) {
1135 en_err(priv, "Failed setting port general configurations "
1136 "for port %d, with error %d\n", priv->port, err);
1137 goto out;
1138 }
1139
1140 /* Init port */
1141 en_warn(priv, "Initializing port\n");
1142 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1143 if (err) {
1144 en_err(priv, "Failed Initializing port\n");
1145 goto out;
1146 }
1147 priv->registered = 1;
1148 mlx4_en_set_default_moderation(priv);
1149 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1150 return 0;
1151
1152 out:
1153 mlx4_en_destroy_netdev(dev);
1154 return err;
1155 }
1156
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree