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Merge branch 'kbuild/rc-fixes' into kbuild/kconfig
[deliverable/linux.git] / drivers / net / ethernet / mellanox / mlx4 / en_netdev.c
1 /*
2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34 #include <linux/etherdevice.h>
35 #include <linux/tcp.h>
36 #include <linux/if_vlan.h>
37 #include <linux/delay.h>
38 #include <linux/slab.h>
39 #include <linux/hash.h>
40 #include <net/ip.h>
41
42 #include <linux/mlx4/driver.h>
43 #include <linux/mlx4/device.h>
44 #include <linux/mlx4/cmd.h>
45 #include <linux/mlx4/cq.h>
46
47 #include "mlx4_en.h"
48 #include "en_port.h"
49
50 int mlx4_en_setup_tc(struct net_device *dev, u8 up)
51 {
52 struct mlx4_en_priv *priv = netdev_priv(dev);
53 int i;
54 unsigned int offset = 0;
55
56 if (up && up != MLX4_EN_NUM_UP)
57 return -EINVAL;
58
59 netdev_set_num_tc(dev, up);
60
61 /* Partition Tx queues evenly amongst UP's */
62 for (i = 0; i < up; i++) {
63 netdev_set_tc_queue(dev, i, priv->num_tx_rings_p_up, offset);
64 offset += priv->num_tx_rings_p_up;
65 }
66
67 return 0;
68 }
69
70 #ifdef CONFIG_RFS_ACCEL
71
72 struct mlx4_en_filter {
73 struct list_head next;
74 struct work_struct work;
75
76 __be32 src_ip;
77 __be32 dst_ip;
78 __be16 src_port;
79 __be16 dst_port;
80
81 int rxq_index;
82 struct mlx4_en_priv *priv;
83 u32 flow_id; /* RFS infrastructure id */
84 int id; /* mlx4_en driver id */
85 u64 reg_id; /* Flow steering API id */
86 u8 activated; /* Used to prevent expiry before filter
87 * is attached
88 */
89 struct hlist_node filter_chain;
90 };
91
92 static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv);
93
94 static void mlx4_en_filter_work(struct work_struct *work)
95 {
96 struct mlx4_en_filter *filter = container_of(work,
97 struct mlx4_en_filter,
98 work);
99 struct mlx4_en_priv *priv = filter->priv;
100 struct mlx4_spec_list spec_tcp = {
101 .id = MLX4_NET_TRANS_RULE_ID_TCP,
102 {
103 .tcp_udp = {
104 .dst_port = filter->dst_port,
105 .dst_port_msk = (__force __be16)-1,
106 .src_port = filter->src_port,
107 .src_port_msk = (__force __be16)-1,
108 },
109 },
110 };
111 struct mlx4_spec_list spec_ip = {
112 .id = MLX4_NET_TRANS_RULE_ID_IPV4,
113 {
114 .ipv4 = {
115 .dst_ip = filter->dst_ip,
116 .dst_ip_msk = (__force __be32)-1,
117 .src_ip = filter->src_ip,
118 .src_ip_msk = (__force __be32)-1,
119 },
120 },
121 };
122 struct mlx4_spec_list spec_eth = {
123 .id = MLX4_NET_TRANS_RULE_ID_ETH,
124 };
125 struct mlx4_net_trans_rule rule = {
126 .list = LIST_HEAD_INIT(rule.list),
127 .queue_mode = MLX4_NET_TRANS_Q_LIFO,
128 .exclusive = 1,
129 .allow_loopback = 1,
130 .promisc_mode = MLX4_FS_PROMISC_NONE,
131 .port = priv->port,
132 .priority = MLX4_DOMAIN_RFS,
133 };
134 int rc;
135 __be64 mac;
136 __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
137
138 list_add_tail(&spec_eth.list, &rule.list);
139 list_add_tail(&spec_ip.list, &rule.list);
140 list_add_tail(&spec_tcp.list, &rule.list);
141
142 mac = cpu_to_be64((priv->mac & MLX4_MAC_MASK) << 16);
143
144 rule.qpn = priv->rss_map.qps[filter->rxq_index].qpn;
145 memcpy(spec_eth.eth.dst_mac, &mac, ETH_ALEN);
146 memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
147
148 filter->activated = 0;
149
150 if (filter->reg_id) {
151 rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
152 if (rc && rc != -ENOENT)
153 en_err(priv, "Error detaching flow. rc = %d\n", rc);
154 }
155
156 rc = mlx4_flow_attach(priv->mdev->dev, &rule, &filter->reg_id);
157 if (rc)
158 en_err(priv, "Error attaching flow. err = %d\n", rc);
159
160 mlx4_en_filter_rfs_expire(priv);
161
162 filter->activated = 1;
163 }
164
165 static inline struct hlist_head *
166 filter_hash_bucket(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
167 __be16 src_port, __be16 dst_port)
168 {
169 unsigned long l;
170 int bucket_idx;
171
172 l = (__force unsigned long)src_port |
173 ((__force unsigned long)dst_port << 2);
174 l ^= (__force unsigned long)(src_ip ^ dst_ip);
175
176 bucket_idx = hash_long(l, MLX4_EN_FILTER_HASH_SHIFT);
177
178 return &priv->filter_hash[bucket_idx];
179 }
180
181 static struct mlx4_en_filter *
182 mlx4_en_filter_alloc(struct mlx4_en_priv *priv, int rxq_index, __be32 src_ip,
183 __be32 dst_ip, __be16 src_port, __be16 dst_port,
184 u32 flow_id)
185 {
186 struct mlx4_en_filter *filter = NULL;
187
188 filter = kzalloc(sizeof(struct mlx4_en_filter), GFP_ATOMIC);
189 if (!filter)
190 return NULL;
191
192 filter->priv = priv;
193 filter->rxq_index = rxq_index;
194 INIT_WORK(&filter->work, mlx4_en_filter_work);
195
196 filter->src_ip = src_ip;
197 filter->dst_ip = dst_ip;
198 filter->src_port = src_port;
199 filter->dst_port = dst_port;
200
201 filter->flow_id = flow_id;
202
203 filter->id = priv->last_filter_id++ % RPS_NO_FILTER;
204
205 list_add_tail(&filter->next, &priv->filters);
206 hlist_add_head(&filter->filter_chain,
207 filter_hash_bucket(priv, src_ip, dst_ip, src_port,
208 dst_port));
209
210 return filter;
211 }
212
213 static void mlx4_en_filter_free(struct mlx4_en_filter *filter)
214 {
215 struct mlx4_en_priv *priv = filter->priv;
216 int rc;
217
218 list_del(&filter->next);
219
220 rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
221 if (rc && rc != -ENOENT)
222 en_err(priv, "Error detaching flow. rc = %d\n", rc);
223
224 kfree(filter);
225 }
226
227 static inline struct mlx4_en_filter *
228 mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
229 __be16 src_port, __be16 dst_port)
230 {
231 struct hlist_node *elem;
232 struct mlx4_en_filter *filter;
233 struct mlx4_en_filter *ret = NULL;
234
235 hlist_for_each_entry(filter, elem,
236 filter_hash_bucket(priv, src_ip, dst_ip,
237 src_port, dst_port),
238 filter_chain) {
239 if (filter->src_ip == src_ip &&
240 filter->dst_ip == dst_ip &&
241 filter->src_port == src_port &&
242 filter->dst_port == dst_port) {
243 ret = filter;
244 break;
245 }
246 }
247
248 return ret;
249 }
250
251 static int
252 mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
253 u16 rxq_index, u32 flow_id)
254 {
255 struct mlx4_en_priv *priv = netdev_priv(net_dev);
256 struct mlx4_en_filter *filter;
257 const struct iphdr *ip;
258 const __be16 *ports;
259 __be32 src_ip;
260 __be32 dst_ip;
261 __be16 src_port;
262 __be16 dst_port;
263 int nhoff = skb_network_offset(skb);
264 int ret = 0;
265
266 if (skb->protocol != htons(ETH_P_IP))
267 return -EPROTONOSUPPORT;
268
269 ip = (const struct iphdr *)(skb->data + nhoff);
270 if (ip_is_fragment(ip))
271 return -EPROTONOSUPPORT;
272
273 ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
274
275 src_ip = ip->saddr;
276 dst_ip = ip->daddr;
277 src_port = ports[0];
278 dst_port = ports[1];
279
280 if (ip->protocol != IPPROTO_TCP)
281 return -EPROTONOSUPPORT;
282
283 spin_lock_bh(&priv->filters_lock);
284 filter = mlx4_en_filter_find(priv, src_ip, dst_ip, src_port, dst_port);
285 if (filter) {
286 if (filter->rxq_index == rxq_index)
287 goto out;
288
289 filter->rxq_index = rxq_index;
290 } else {
291 filter = mlx4_en_filter_alloc(priv, rxq_index,
292 src_ip, dst_ip,
293 src_port, dst_port, flow_id);
294 if (!filter) {
295 ret = -ENOMEM;
296 goto err;
297 }
298 }
299
300 queue_work(priv->mdev->workqueue, &filter->work);
301
302 out:
303 ret = filter->id;
304 err:
305 spin_unlock_bh(&priv->filters_lock);
306
307 return ret;
308 }
309
310 void mlx4_en_cleanup_filters(struct mlx4_en_priv *priv,
311 struct mlx4_en_rx_ring *rx_ring)
312 {
313 struct mlx4_en_filter *filter, *tmp;
314 LIST_HEAD(del_list);
315
316 spin_lock_bh(&priv->filters_lock);
317 list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
318 list_move(&filter->next, &del_list);
319 hlist_del(&filter->filter_chain);
320 }
321 spin_unlock_bh(&priv->filters_lock);
322
323 list_for_each_entry_safe(filter, tmp, &del_list, next) {
324 cancel_work_sync(&filter->work);
325 mlx4_en_filter_free(filter);
326 }
327 }
328
329 static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv)
330 {
331 struct mlx4_en_filter *filter = NULL, *tmp, *last_filter = NULL;
332 LIST_HEAD(del_list);
333 int i = 0;
334
335 spin_lock_bh(&priv->filters_lock);
336 list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
337 if (i > MLX4_EN_FILTER_EXPIRY_QUOTA)
338 break;
339
340 if (filter->activated &&
341 !work_pending(&filter->work) &&
342 rps_may_expire_flow(priv->dev,
343 filter->rxq_index, filter->flow_id,
344 filter->id)) {
345 list_move(&filter->next, &del_list);
346 hlist_del(&filter->filter_chain);
347 } else
348 last_filter = filter;
349
350 i++;
351 }
352
353 if (last_filter && (&last_filter->next != priv->filters.next))
354 list_move(&priv->filters, &last_filter->next);
355
356 spin_unlock_bh(&priv->filters_lock);
357
358 list_for_each_entry_safe(filter, tmp, &del_list, next)
359 mlx4_en_filter_free(filter);
360 }
361 #endif
362
363 static int mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
364 {
365 struct mlx4_en_priv *priv = netdev_priv(dev);
366 struct mlx4_en_dev *mdev = priv->mdev;
367 int err;
368 int idx;
369
370 en_dbg(HW, priv, "adding VLAN:%d\n", vid);
371
372 set_bit(vid, priv->active_vlans);
373
374 /* Add VID to port VLAN filter */
375 mutex_lock(&mdev->state_lock);
376 if (mdev->device_up && priv->port_up) {
377 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
378 if (err)
379 en_err(priv, "Failed configuring VLAN filter\n");
380 }
381 if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
382 en_err(priv, "failed adding vlan %d\n", vid);
383 mutex_unlock(&mdev->state_lock);
384
385 return 0;
386 }
387
388 static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
389 {
390 struct mlx4_en_priv *priv = netdev_priv(dev);
391 struct mlx4_en_dev *mdev = priv->mdev;
392 int err;
393 int idx;
394
395 en_dbg(HW, priv, "Killing VID:%d\n", vid);
396
397 clear_bit(vid, priv->active_vlans);
398
399 /* Remove VID from port VLAN filter */
400 mutex_lock(&mdev->state_lock);
401 if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
402 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
403 else
404 en_err(priv, "could not find vid %d in cache\n", vid);
405
406 if (mdev->device_up && priv->port_up) {
407 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
408 if (err)
409 en_err(priv, "Failed configuring VLAN filter\n");
410 }
411 mutex_unlock(&mdev->state_lock);
412
413 return 0;
414 }
415
416 u64 mlx4_en_mac_to_u64(u8 *addr)
417 {
418 u64 mac = 0;
419 int i;
420
421 for (i = 0; i < ETH_ALEN; i++) {
422 mac <<= 8;
423 mac |= addr[i];
424 }
425 return mac;
426 }
427
428 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
429 {
430 struct mlx4_en_priv *priv = netdev_priv(dev);
431 struct mlx4_en_dev *mdev = priv->mdev;
432 struct sockaddr *saddr = addr;
433
434 if (!is_valid_ether_addr(saddr->sa_data))
435 return -EADDRNOTAVAIL;
436
437 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
438 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
439 queue_work(mdev->workqueue, &priv->mac_task);
440 return 0;
441 }
442
443 static void mlx4_en_do_set_mac(struct work_struct *work)
444 {
445 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
446 mac_task);
447 struct mlx4_en_dev *mdev = priv->mdev;
448 int err = 0;
449
450 mutex_lock(&mdev->state_lock);
451 if (priv->port_up) {
452 /* Remove old MAC and insert the new one */
453 err = mlx4_replace_mac(mdev->dev, priv->port,
454 priv->base_qpn, priv->mac);
455 if (err)
456 en_err(priv, "Failed changing HW MAC address\n");
457 } else
458 en_dbg(HW, priv, "Port is down while "
459 "registering mac, exiting...\n");
460
461 mutex_unlock(&mdev->state_lock);
462 }
463
464 static void mlx4_en_clear_list(struct net_device *dev)
465 {
466 struct mlx4_en_priv *priv = netdev_priv(dev);
467 struct mlx4_en_mc_list *tmp, *mc_to_del;
468
469 list_for_each_entry_safe(mc_to_del, tmp, &priv->mc_list, list) {
470 list_del(&mc_to_del->list);
471 kfree(mc_to_del);
472 }
473 }
474
475 static void mlx4_en_cache_mclist(struct net_device *dev)
476 {
477 struct mlx4_en_priv *priv = netdev_priv(dev);
478 struct netdev_hw_addr *ha;
479 struct mlx4_en_mc_list *tmp;
480
481 mlx4_en_clear_list(dev);
482 netdev_for_each_mc_addr(ha, dev) {
483 tmp = kzalloc(sizeof(struct mlx4_en_mc_list), GFP_ATOMIC);
484 if (!tmp) {
485 en_err(priv, "failed to allocate multicast list\n");
486 mlx4_en_clear_list(dev);
487 return;
488 }
489 memcpy(tmp->addr, ha->addr, ETH_ALEN);
490 list_add_tail(&tmp->list, &priv->mc_list);
491 }
492 }
493
494 static void update_mclist_flags(struct mlx4_en_priv *priv,
495 struct list_head *dst,
496 struct list_head *src)
497 {
498 struct mlx4_en_mc_list *dst_tmp, *src_tmp, *new_mc;
499 bool found;
500
501 /* Find all the entries that should be removed from dst,
502 * These are the entries that are not found in src
503 */
504 list_for_each_entry(dst_tmp, dst, list) {
505 found = false;
506 list_for_each_entry(src_tmp, src, list) {
507 if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
508 found = true;
509 break;
510 }
511 }
512 if (!found)
513 dst_tmp->action = MCLIST_REM;
514 }
515
516 /* Add entries that exist in src but not in dst
517 * mark them as need to add
518 */
519 list_for_each_entry(src_tmp, src, list) {
520 found = false;
521 list_for_each_entry(dst_tmp, dst, list) {
522 if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
523 dst_tmp->action = MCLIST_NONE;
524 found = true;
525 break;
526 }
527 }
528 if (!found) {
529 new_mc = kmalloc(sizeof(struct mlx4_en_mc_list),
530 GFP_KERNEL);
531 if (!new_mc) {
532 en_err(priv, "Failed to allocate current multicast list\n");
533 return;
534 }
535 memcpy(new_mc, src_tmp,
536 sizeof(struct mlx4_en_mc_list));
537 new_mc->action = MCLIST_ADD;
538 list_add_tail(&new_mc->list, dst);
539 }
540 }
541 }
542
543 static void mlx4_en_set_multicast(struct net_device *dev)
544 {
545 struct mlx4_en_priv *priv = netdev_priv(dev);
546
547 if (!priv->port_up)
548 return;
549
550 queue_work(priv->mdev->workqueue, &priv->mcast_task);
551 }
552
553 static void mlx4_en_do_set_multicast(struct work_struct *work)
554 {
555 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
556 mcast_task);
557 struct mlx4_en_dev *mdev = priv->mdev;
558 struct net_device *dev = priv->dev;
559 struct mlx4_en_mc_list *mclist, *tmp;
560 u64 mcast_addr = 0;
561 u8 mc_list[16] = {0};
562 int err = 0;
563
564 mutex_lock(&mdev->state_lock);
565 if (!mdev->device_up) {
566 en_dbg(HW, priv, "Card is not up, "
567 "ignoring multicast change.\n");
568 goto out;
569 }
570 if (!priv->port_up) {
571 en_dbg(HW, priv, "Port is down, "
572 "ignoring multicast change.\n");
573 goto out;
574 }
575
576 if (!netif_carrier_ok(dev)) {
577 if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
578 if (priv->port_state.link_state) {
579 priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
580 netif_carrier_on(dev);
581 en_dbg(LINK, priv, "Link Up\n");
582 }
583 }
584 }
585
586 /*
587 * Promsicuous mode: disable all filters
588 */
589
590 if (dev->flags & IFF_PROMISC) {
591 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
592 if (netif_msg_rx_status(priv))
593 en_warn(priv, "Entering promiscuous mode\n");
594 priv->flags |= MLX4_EN_FLAG_PROMISC;
595
596 /* Enable promiscouos mode */
597 switch (mdev->dev->caps.steering_mode) {
598 case MLX4_STEERING_MODE_DEVICE_MANAGED:
599 err = mlx4_flow_steer_promisc_add(mdev->dev,
600 priv->port,
601 priv->base_qpn,
602 MLX4_FS_PROMISC_UPLINK);
603 if (err)
604 en_err(priv, "Failed enabling promiscuous mode\n");
605 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
606 break;
607
608 case MLX4_STEERING_MODE_B0:
609 err = mlx4_unicast_promisc_add(mdev->dev,
610 priv->base_qpn,
611 priv->port);
612 if (err)
613 en_err(priv, "Failed enabling unicast promiscuous mode\n");
614
615 /* Add the default qp number as multicast
616 * promisc
617 */
618 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
619 err = mlx4_multicast_promisc_add(mdev->dev,
620 priv->base_qpn,
621 priv->port);
622 if (err)
623 en_err(priv, "Failed enabling multicast promiscuous mode\n");
624 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
625 }
626 break;
627
628 case MLX4_STEERING_MODE_A0:
629 err = mlx4_SET_PORT_qpn_calc(mdev->dev,
630 priv->port,
631 priv->base_qpn,
632 1);
633 if (err)
634 en_err(priv, "Failed enabling promiscuous mode\n");
635 break;
636 }
637
638 /* Disable port multicast filter (unconditionally) */
639 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
640 0, MLX4_MCAST_DISABLE);
641 if (err)
642 en_err(priv, "Failed disabling "
643 "multicast filter\n");
644
645 /* Disable port VLAN filter */
646 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
647 if (err)
648 en_err(priv, "Failed disabling VLAN filter\n");
649 }
650 goto out;
651 }
652
653 /*
654 * Not in promiscuous mode
655 */
656
657 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
658 if (netif_msg_rx_status(priv))
659 en_warn(priv, "Leaving promiscuous mode\n");
660 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
661
662 /* Disable promiscouos mode */
663 switch (mdev->dev->caps.steering_mode) {
664 case MLX4_STEERING_MODE_DEVICE_MANAGED:
665 err = mlx4_flow_steer_promisc_remove(mdev->dev,
666 priv->port,
667 MLX4_FS_PROMISC_UPLINK);
668 if (err)
669 en_err(priv, "Failed disabling promiscuous mode\n");
670 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
671 break;
672
673 case MLX4_STEERING_MODE_B0:
674 err = mlx4_unicast_promisc_remove(mdev->dev,
675 priv->base_qpn,
676 priv->port);
677 if (err)
678 en_err(priv, "Failed disabling unicast promiscuous mode\n");
679 /* Disable Multicast promisc */
680 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
681 err = mlx4_multicast_promisc_remove(mdev->dev,
682 priv->base_qpn,
683 priv->port);
684 if (err)
685 en_err(priv, "Failed disabling multicast promiscuous mode\n");
686 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
687 }
688 break;
689
690 case MLX4_STEERING_MODE_A0:
691 err = mlx4_SET_PORT_qpn_calc(mdev->dev,
692 priv->port,
693 priv->base_qpn, 0);
694 if (err)
695 en_err(priv, "Failed disabling promiscuous mode\n");
696 break;
697 }
698
699 /* Enable port VLAN filter */
700 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
701 if (err)
702 en_err(priv, "Failed enabling VLAN filter\n");
703 }
704
705 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
706 if (dev->flags & IFF_ALLMULTI) {
707 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
708 0, MLX4_MCAST_DISABLE);
709 if (err)
710 en_err(priv, "Failed disabling multicast filter\n");
711
712 /* Add the default qp number as multicast promisc */
713 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
714 switch (mdev->dev->caps.steering_mode) {
715 case MLX4_STEERING_MODE_DEVICE_MANAGED:
716 err = mlx4_flow_steer_promisc_add(mdev->dev,
717 priv->port,
718 priv->base_qpn,
719 MLX4_FS_PROMISC_ALL_MULTI);
720 break;
721
722 case MLX4_STEERING_MODE_B0:
723 err = mlx4_multicast_promisc_add(mdev->dev,
724 priv->base_qpn,
725 priv->port);
726 break;
727
728 case MLX4_STEERING_MODE_A0:
729 break;
730 }
731 if (err)
732 en_err(priv, "Failed entering multicast promisc mode\n");
733 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
734 }
735 } else {
736 /* Disable Multicast promisc */
737 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
738 switch (mdev->dev->caps.steering_mode) {
739 case MLX4_STEERING_MODE_DEVICE_MANAGED:
740 err = mlx4_flow_steer_promisc_remove(mdev->dev,
741 priv->port,
742 MLX4_FS_PROMISC_ALL_MULTI);
743 break;
744
745 case MLX4_STEERING_MODE_B0:
746 err = mlx4_multicast_promisc_remove(mdev->dev,
747 priv->base_qpn,
748 priv->port);
749 break;
750
751 case MLX4_STEERING_MODE_A0:
752 break;
753 }
754 if (err)
755 en_err(priv, "Failed disabling multicast promiscuous mode\n");
756 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
757 }
758
759 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
760 0, MLX4_MCAST_DISABLE);
761 if (err)
762 en_err(priv, "Failed disabling multicast filter\n");
763
764 /* Flush mcast filter and init it with broadcast address */
765 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
766 1, MLX4_MCAST_CONFIG);
767
768 /* Update multicast list - we cache all addresses so they won't
769 * change while HW is updated holding the command semaphor */
770 netif_tx_lock_bh(dev);
771 mlx4_en_cache_mclist(dev);
772 netif_tx_unlock_bh(dev);
773 list_for_each_entry(mclist, &priv->mc_list, list) {
774 mcast_addr = mlx4_en_mac_to_u64(mclist->addr);
775 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
776 mcast_addr, 0, MLX4_MCAST_CONFIG);
777 }
778 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
779 0, MLX4_MCAST_ENABLE);
780 if (err)
781 en_err(priv, "Failed enabling multicast filter\n");
782
783 update_mclist_flags(priv, &priv->curr_list, &priv->mc_list);
784 list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
785 if (mclist->action == MCLIST_REM) {
786 /* detach this address and delete from list */
787 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
788 mc_list[5] = priv->port;
789 err = mlx4_multicast_detach(mdev->dev,
790 &priv->rss_map.indir_qp,
791 mc_list,
792 MLX4_PROT_ETH,
793 mclist->reg_id);
794 if (err)
795 en_err(priv, "Fail to detach multicast address\n");
796
797 /* remove from list */
798 list_del(&mclist->list);
799 kfree(mclist);
800 } else if (mclist->action == MCLIST_ADD) {
801 /* attach the address */
802 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
803 /* needed for B0 steering support */
804 mc_list[5] = priv->port;
805 err = mlx4_multicast_attach(mdev->dev,
806 &priv->rss_map.indir_qp,
807 mc_list,
808 priv->port, 0,
809 MLX4_PROT_ETH,
810 &mclist->reg_id);
811 if (err)
812 en_err(priv, "Fail to attach multicast address\n");
813
814 }
815 }
816 }
817 out:
818 mutex_unlock(&mdev->state_lock);
819 }
820
821 #ifdef CONFIG_NET_POLL_CONTROLLER
822 static void mlx4_en_netpoll(struct net_device *dev)
823 {
824 struct mlx4_en_priv *priv = netdev_priv(dev);
825 struct mlx4_en_cq *cq;
826 unsigned long flags;
827 int i;
828
829 for (i = 0; i < priv->rx_ring_num; i++) {
830 cq = &priv->rx_cq[i];
831 spin_lock_irqsave(&cq->lock, flags);
832 napi_synchronize(&cq->napi);
833 mlx4_en_process_rx_cq(dev, cq, 0);
834 spin_unlock_irqrestore(&cq->lock, flags);
835 }
836 }
837 #endif
838
839 static void mlx4_en_tx_timeout(struct net_device *dev)
840 {
841 struct mlx4_en_priv *priv = netdev_priv(dev);
842 struct mlx4_en_dev *mdev = priv->mdev;
843
844 if (netif_msg_timer(priv))
845 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
846
847 priv->port_stats.tx_timeout++;
848 en_dbg(DRV, priv, "Scheduling watchdog\n");
849 queue_work(mdev->workqueue, &priv->watchdog_task);
850 }
851
852
853 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
854 {
855 struct mlx4_en_priv *priv = netdev_priv(dev);
856
857 spin_lock_bh(&priv->stats_lock);
858 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
859 spin_unlock_bh(&priv->stats_lock);
860
861 return &priv->ret_stats;
862 }
863
864 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
865 {
866 struct mlx4_en_cq *cq;
867 int i;
868
869 /* If we haven't received a specific coalescing setting
870 * (module param), we set the moderation parameters as follows:
871 * - moder_cnt is set to the number of mtu sized packets to
872 * satisfy our coalescing target.
873 * - moder_time is set to a fixed value.
874 */
875 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
876 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
877 priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
878 priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
879 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
880 "rx_frames:%d rx_usecs:%d\n",
881 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
882
883 /* Setup cq moderation params */
884 for (i = 0; i < priv->rx_ring_num; i++) {
885 cq = &priv->rx_cq[i];
886 cq->moder_cnt = priv->rx_frames;
887 cq->moder_time = priv->rx_usecs;
888 priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
889 priv->last_moder_packets[i] = 0;
890 priv->last_moder_bytes[i] = 0;
891 }
892
893 for (i = 0; i < priv->tx_ring_num; i++) {
894 cq = &priv->tx_cq[i];
895 cq->moder_cnt = priv->tx_frames;
896 cq->moder_time = priv->tx_usecs;
897 }
898
899 /* Reset auto-moderation params */
900 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
901 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
902 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
903 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
904 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
905 priv->adaptive_rx_coal = 1;
906 priv->last_moder_jiffies = 0;
907 priv->last_moder_tx_packets = 0;
908 }
909
910 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
911 {
912 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
913 struct mlx4_en_cq *cq;
914 unsigned long packets;
915 unsigned long rate;
916 unsigned long avg_pkt_size;
917 unsigned long rx_packets;
918 unsigned long rx_bytes;
919 unsigned long rx_pkt_diff;
920 int moder_time;
921 int ring, err;
922
923 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
924 return;
925
926 for (ring = 0; ring < priv->rx_ring_num; ring++) {
927 spin_lock_bh(&priv->stats_lock);
928 rx_packets = priv->rx_ring[ring].packets;
929 rx_bytes = priv->rx_ring[ring].bytes;
930 spin_unlock_bh(&priv->stats_lock);
931
932 rx_pkt_diff = ((unsigned long) (rx_packets -
933 priv->last_moder_packets[ring]));
934 packets = rx_pkt_diff;
935 rate = packets * HZ / period;
936 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
937 priv->last_moder_bytes[ring])) / packets : 0;
938
939 /* Apply auto-moderation only when packet rate
940 * exceeds a rate that it matters */
941 if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
942 avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
943 if (rate < priv->pkt_rate_low)
944 moder_time = priv->rx_usecs_low;
945 else if (rate > priv->pkt_rate_high)
946 moder_time = priv->rx_usecs_high;
947 else
948 moder_time = (rate - priv->pkt_rate_low) *
949 (priv->rx_usecs_high - priv->rx_usecs_low) /
950 (priv->pkt_rate_high - priv->pkt_rate_low) +
951 priv->rx_usecs_low;
952 } else {
953 moder_time = priv->rx_usecs_low;
954 }
955
956 if (moder_time != priv->last_moder_time[ring]) {
957 priv->last_moder_time[ring] = moder_time;
958 cq = &priv->rx_cq[ring];
959 cq->moder_time = moder_time;
960 err = mlx4_en_set_cq_moder(priv, cq);
961 if (err)
962 en_err(priv, "Failed modifying moderation "
963 "for cq:%d\n", ring);
964 }
965 priv->last_moder_packets[ring] = rx_packets;
966 priv->last_moder_bytes[ring] = rx_bytes;
967 }
968
969 priv->last_moder_jiffies = jiffies;
970 }
971
972 static void mlx4_en_do_get_stats(struct work_struct *work)
973 {
974 struct delayed_work *delay = to_delayed_work(work);
975 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
976 stats_task);
977 struct mlx4_en_dev *mdev = priv->mdev;
978 int err;
979
980 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
981 if (err)
982 en_dbg(HW, priv, "Could not update stats\n");
983
984 mutex_lock(&mdev->state_lock);
985 if (mdev->device_up) {
986 if (priv->port_up)
987 mlx4_en_auto_moderation(priv);
988
989 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
990 }
991 if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
992 queue_work(mdev->workqueue, &priv->mac_task);
993 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
994 }
995 mutex_unlock(&mdev->state_lock);
996 }
997
998 static void mlx4_en_linkstate(struct work_struct *work)
999 {
1000 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1001 linkstate_task);
1002 struct mlx4_en_dev *mdev = priv->mdev;
1003 int linkstate = priv->link_state;
1004
1005 mutex_lock(&mdev->state_lock);
1006 /* If observable port state changed set carrier state and
1007 * report to system log */
1008 if (priv->last_link_state != linkstate) {
1009 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
1010 en_info(priv, "Link Down\n");
1011 netif_carrier_off(priv->dev);
1012 } else {
1013 en_info(priv, "Link Up\n");
1014 netif_carrier_on(priv->dev);
1015 }
1016 }
1017 priv->last_link_state = linkstate;
1018 mutex_unlock(&mdev->state_lock);
1019 }
1020
1021
1022 int mlx4_en_start_port(struct net_device *dev)
1023 {
1024 struct mlx4_en_priv *priv = netdev_priv(dev);
1025 struct mlx4_en_dev *mdev = priv->mdev;
1026 struct mlx4_en_cq *cq;
1027 struct mlx4_en_tx_ring *tx_ring;
1028 int rx_index = 0;
1029 int tx_index = 0;
1030 int err = 0;
1031 int i;
1032 int j;
1033 u8 mc_list[16] = {0};
1034
1035 if (priv->port_up) {
1036 en_dbg(DRV, priv, "start port called while port already up\n");
1037 return 0;
1038 }
1039
1040 INIT_LIST_HEAD(&priv->mc_list);
1041 INIT_LIST_HEAD(&priv->curr_list);
1042
1043 /* Calculate Rx buf size */
1044 dev->mtu = min(dev->mtu, priv->max_mtu);
1045 mlx4_en_calc_rx_buf(dev);
1046 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
1047
1048 /* Configure rx cq's and rings */
1049 err = mlx4_en_activate_rx_rings(priv);
1050 if (err) {
1051 en_err(priv, "Failed to activate RX rings\n");
1052 return err;
1053 }
1054 for (i = 0; i < priv->rx_ring_num; i++) {
1055 cq = &priv->rx_cq[i];
1056
1057 err = mlx4_en_activate_cq(priv, cq, i);
1058 if (err) {
1059 en_err(priv, "Failed activating Rx CQ\n");
1060 goto cq_err;
1061 }
1062 for (j = 0; j < cq->size; j++)
1063 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
1064 err = mlx4_en_set_cq_moder(priv, cq);
1065 if (err) {
1066 en_err(priv, "Failed setting cq moderation parameters");
1067 mlx4_en_deactivate_cq(priv, cq);
1068 goto cq_err;
1069 }
1070 mlx4_en_arm_cq(priv, cq);
1071 priv->rx_ring[i].cqn = cq->mcq.cqn;
1072 ++rx_index;
1073 }
1074
1075 /* Set qp number */
1076 en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
1077 err = mlx4_get_eth_qp(mdev->dev, priv->port,
1078 priv->mac, &priv->base_qpn);
1079 if (err) {
1080 en_err(priv, "Failed getting eth qp\n");
1081 goto cq_err;
1082 }
1083 mdev->mac_removed[priv->port] = 0;
1084
1085 err = mlx4_en_config_rss_steer(priv);
1086 if (err) {
1087 en_err(priv, "Failed configuring rss steering\n");
1088 goto mac_err;
1089 }
1090
1091 err = mlx4_en_create_drop_qp(priv);
1092 if (err)
1093 goto rss_err;
1094
1095 /* Configure tx cq's and rings */
1096 for (i = 0; i < priv->tx_ring_num; i++) {
1097 /* Configure cq */
1098 cq = &priv->tx_cq[i];
1099 err = mlx4_en_activate_cq(priv, cq, i);
1100 if (err) {
1101 en_err(priv, "Failed allocating Tx CQ\n");
1102 goto tx_err;
1103 }
1104 err = mlx4_en_set_cq_moder(priv, cq);
1105 if (err) {
1106 en_err(priv, "Failed setting cq moderation parameters");
1107 mlx4_en_deactivate_cq(priv, cq);
1108 goto tx_err;
1109 }
1110 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
1111 cq->buf->wqe_index = cpu_to_be16(0xffff);
1112
1113 /* Configure ring */
1114 tx_ring = &priv->tx_ring[i];
1115 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
1116 i / priv->num_tx_rings_p_up);
1117 if (err) {
1118 en_err(priv, "Failed allocating Tx ring\n");
1119 mlx4_en_deactivate_cq(priv, cq);
1120 goto tx_err;
1121 }
1122 tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
1123
1124 /* Arm CQ for TX completions */
1125 mlx4_en_arm_cq(priv, cq);
1126
1127 /* Set initial ownership of all Tx TXBBs to SW (1) */
1128 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
1129 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
1130 ++tx_index;
1131 }
1132
1133 /* Configure port */
1134 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1135 priv->rx_skb_size + ETH_FCS_LEN,
1136 priv->prof->tx_pause,
1137 priv->prof->tx_ppp,
1138 priv->prof->rx_pause,
1139 priv->prof->rx_ppp);
1140 if (err) {
1141 en_err(priv, "Failed setting port general configurations "
1142 "for port %d, with error %d\n", priv->port, err);
1143 goto tx_err;
1144 }
1145 /* Set default qp number */
1146 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
1147 if (err) {
1148 en_err(priv, "Failed setting default qp numbers\n");
1149 goto tx_err;
1150 }
1151
1152 /* Init port */
1153 en_dbg(HW, priv, "Initializing port\n");
1154 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1155 if (err) {
1156 en_err(priv, "Failed Initializing port\n");
1157 goto tx_err;
1158 }
1159
1160 /* Attach rx QP to bradcast address */
1161 memset(&mc_list[10], 0xff, ETH_ALEN);
1162 mc_list[5] = priv->port; /* needed for B0 steering support */
1163 if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1164 priv->port, 0, MLX4_PROT_ETH,
1165 &priv->broadcast_id))
1166 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
1167
1168 /* Must redo promiscuous mode setup. */
1169 priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
1170 if (mdev->dev->caps.steering_mode ==
1171 MLX4_STEERING_MODE_DEVICE_MANAGED) {
1172 mlx4_flow_steer_promisc_remove(mdev->dev,
1173 priv->port,
1174 MLX4_FS_PROMISC_UPLINK);
1175 mlx4_flow_steer_promisc_remove(mdev->dev,
1176 priv->port,
1177 MLX4_FS_PROMISC_ALL_MULTI);
1178 }
1179
1180 /* Schedule multicast task to populate multicast list */
1181 queue_work(mdev->workqueue, &priv->mcast_task);
1182
1183 mlx4_set_stats_bitmap(mdev->dev, &priv->stats_bitmap);
1184
1185 priv->port_up = true;
1186 netif_tx_start_all_queues(dev);
1187 return 0;
1188
1189 tx_err:
1190 while (tx_index--) {
1191 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
1192 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
1193 }
1194 mlx4_en_destroy_drop_qp(priv);
1195 rss_err:
1196 mlx4_en_release_rss_steer(priv);
1197 mac_err:
1198 mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
1199 cq_err:
1200 while (rx_index--)
1201 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
1202 for (i = 0; i < priv->rx_ring_num; i++)
1203 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1204
1205 return err; /* need to close devices */
1206 }
1207
1208
1209 void mlx4_en_stop_port(struct net_device *dev)
1210 {
1211 struct mlx4_en_priv *priv = netdev_priv(dev);
1212 struct mlx4_en_dev *mdev = priv->mdev;
1213 struct mlx4_en_mc_list *mclist, *tmp;
1214 int i;
1215 u8 mc_list[16] = {0};
1216
1217 if (!priv->port_up) {
1218 en_dbg(DRV, priv, "stop port called while port already down\n");
1219 return;
1220 }
1221
1222 /* Synchronize with tx routine */
1223 netif_tx_lock_bh(dev);
1224 netif_tx_stop_all_queues(dev);
1225 netif_tx_unlock_bh(dev);
1226
1227 /* Set port as not active */
1228 priv->port_up = false;
1229
1230 /* Detach All multicasts */
1231 memset(&mc_list[10], 0xff, ETH_ALEN);
1232 mc_list[5] = priv->port; /* needed for B0 steering support */
1233 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1234 MLX4_PROT_ETH, priv->broadcast_id);
1235 list_for_each_entry(mclist, &priv->curr_list, list) {
1236 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
1237 mc_list[5] = priv->port;
1238 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
1239 mc_list, MLX4_PROT_ETH, mclist->reg_id);
1240 }
1241 mlx4_en_clear_list(dev);
1242 list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
1243 list_del(&mclist->list);
1244 kfree(mclist);
1245 }
1246
1247 /* Flush multicast filter */
1248 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
1249
1250 mlx4_en_destroy_drop_qp(priv);
1251
1252 /* Free TX Rings */
1253 for (i = 0; i < priv->tx_ring_num; i++) {
1254 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
1255 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
1256 }
1257 msleep(10);
1258
1259 for (i = 0; i < priv->tx_ring_num; i++)
1260 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
1261
1262 /* Free RSS qps */
1263 mlx4_en_release_rss_steer(priv);
1264
1265 /* Unregister Mac address for the port */
1266 mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
1267 mdev->mac_removed[priv->port] = 1;
1268
1269 /* Free RX Rings */
1270 for (i = 0; i < priv->rx_ring_num; i++) {
1271 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1272 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
1273 msleep(1);
1274 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
1275 }
1276
1277 /* close port*/
1278 mlx4_CLOSE_PORT(mdev->dev, priv->port);
1279 }
1280
1281 static void mlx4_en_restart(struct work_struct *work)
1282 {
1283 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1284 watchdog_task);
1285 struct mlx4_en_dev *mdev = priv->mdev;
1286 struct net_device *dev = priv->dev;
1287 int i;
1288
1289 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
1290
1291 mutex_lock(&mdev->state_lock);
1292 if (priv->port_up) {
1293 mlx4_en_stop_port(dev);
1294 for (i = 0; i < priv->tx_ring_num; i++)
1295 netdev_tx_reset_queue(priv->tx_ring[i].tx_queue);
1296 if (mlx4_en_start_port(dev))
1297 en_err(priv, "Failed restarting port %d\n", priv->port);
1298 }
1299 mutex_unlock(&mdev->state_lock);
1300 }
1301
1302 static void mlx4_en_clear_stats(struct net_device *dev)
1303 {
1304 struct mlx4_en_priv *priv = netdev_priv(dev);
1305 struct mlx4_en_dev *mdev = priv->mdev;
1306 int i;
1307
1308 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
1309 en_dbg(HW, priv, "Failed dumping statistics\n");
1310
1311 memset(&priv->stats, 0, sizeof(priv->stats));
1312 memset(&priv->pstats, 0, sizeof(priv->pstats));
1313 memset(&priv->pkstats, 0, sizeof(priv->pkstats));
1314 memset(&priv->port_stats, 0, sizeof(priv->port_stats));
1315
1316 for (i = 0; i < priv->tx_ring_num; i++) {
1317 priv->tx_ring[i].bytes = 0;
1318 priv->tx_ring[i].packets = 0;
1319 priv->tx_ring[i].tx_csum = 0;
1320 }
1321 for (i = 0; i < priv->rx_ring_num; i++) {
1322 priv->rx_ring[i].bytes = 0;
1323 priv->rx_ring[i].packets = 0;
1324 priv->rx_ring[i].csum_ok = 0;
1325 priv->rx_ring[i].csum_none = 0;
1326 }
1327 }
1328
1329 static int mlx4_en_open(struct net_device *dev)
1330 {
1331 struct mlx4_en_priv *priv = netdev_priv(dev);
1332 struct mlx4_en_dev *mdev = priv->mdev;
1333 int err = 0;
1334
1335 mutex_lock(&mdev->state_lock);
1336
1337 if (!mdev->device_up) {
1338 en_err(priv, "Cannot open - device down/disabled\n");
1339 err = -EBUSY;
1340 goto out;
1341 }
1342
1343 /* Reset HW statistics and SW counters */
1344 mlx4_en_clear_stats(dev);
1345
1346 err = mlx4_en_start_port(dev);
1347 if (err)
1348 en_err(priv, "Failed starting port:%d\n", priv->port);
1349
1350 out:
1351 mutex_unlock(&mdev->state_lock);
1352 return err;
1353 }
1354
1355
1356 static int mlx4_en_close(struct net_device *dev)
1357 {
1358 struct mlx4_en_priv *priv = netdev_priv(dev);
1359 struct mlx4_en_dev *mdev = priv->mdev;
1360
1361 en_dbg(IFDOWN, priv, "Close port called\n");
1362
1363 mutex_lock(&mdev->state_lock);
1364
1365 mlx4_en_stop_port(dev);
1366 netif_carrier_off(dev);
1367
1368 mutex_unlock(&mdev->state_lock);
1369 return 0;
1370 }
1371
1372 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
1373 {
1374 int i;
1375
1376 #ifdef CONFIG_RFS_ACCEL
1377 free_irq_cpu_rmap(priv->dev->rx_cpu_rmap);
1378 priv->dev->rx_cpu_rmap = NULL;
1379 #endif
1380
1381 for (i = 0; i < priv->tx_ring_num; i++) {
1382 if (priv->tx_ring[i].tx_info)
1383 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
1384 if (priv->tx_cq[i].buf)
1385 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
1386 }
1387
1388 for (i = 0; i < priv->rx_ring_num; i++) {
1389 if (priv->rx_ring[i].rx_info)
1390 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
1391 priv->prof->rx_ring_size, priv->stride);
1392 if (priv->rx_cq[i].buf)
1393 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
1394 }
1395
1396 if (priv->base_tx_qpn) {
1397 mlx4_qp_release_range(priv->mdev->dev, priv->base_tx_qpn, priv->tx_ring_num);
1398 priv->base_tx_qpn = 0;
1399 }
1400 }
1401
1402 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
1403 {
1404 struct mlx4_en_port_profile *prof = priv->prof;
1405 int i;
1406 int err;
1407
1408 err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &priv->base_tx_qpn);
1409 if (err) {
1410 en_err(priv, "failed reserving range for TX rings\n");
1411 return err;
1412 }
1413
1414 /* Create tx Rings */
1415 for (i = 0; i < priv->tx_ring_num; i++) {
1416 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
1417 prof->tx_ring_size, i, TX))
1418 goto err;
1419
1420 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], priv->base_tx_qpn + i,
1421 prof->tx_ring_size, TXBB_SIZE))
1422 goto err;
1423 }
1424
1425 /* Create rx Rings */
1426 for (i = 0; i < priv->rx_ring_num; i++) {
1427 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
1428 prof->rx_ring_size, i, RX))
1429 goto err;
1430
1431 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
1432 prof->rx_ring_size, priv->stride))
1433 goto err;
1434 }
1435
1436 #ifdef CONFIG_RFS_ACCEL
1437 priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->rx_ring_num);
1438 if (!priv->dev->rx_cpu_rmap)
1439 goto err;
1440
1441 INIT_LIST_HEAD(&priv->filters);
1442 spin_lock_init(&priv->filters_lock);
1443 #endif
1444
1445 return 0;
1446
1447 err:
1448 en_err(priv, "Failed to allocate NIC resources\n");
1449 return -ENOMEM;
1450 }
1451
1452
1453 void mlx4_en_destroy_netdev(struct net_device *dev)
1454 {
1455 struct mlx4_en_priv *priv = netdev_priv(dev);
1456 struct mlx4_en_dev *mdev = priv->mdev;
1457
1458 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
1459
1460 /* Unregister device - this will close the port if it was up */
1461 if (priv->registered)
1462 unregister_netdev(dev);
1463
1464 if (priv->allocated)
1465 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
1466
1467 cancel_delayed_work(&priv->stats_task);
1468 /* flush any pending task for this netdev */
1469 flush_workqueue(mdev->workqueue);
1470
1471 /* Detach the netdev so tasks would not attempt to access it */
1472 mutex_lock(&mdev->state_lock);
1473 mdev->pndev[priv->port] = NULL;
1474 mutex_unlock(&mdev->state_lock);
1475
1476 mlx4_en_free_resources(priv);
1477
1478 kfree(priv->tx_ring);
1479 kfree(priv->tx_cq);
1480
1481 free_netdev(dev);
1482 }
1483
1484 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
1485 {
1486 struct mlx4_en_priv *priv = netdev_priv(dev);
1487 struct mlx4_en_dev *mdev = priv->mdev;
1488 int err = 0;
1489
1490 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
1491 dev->mtu, new_mtu);
1492
1493 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
1494 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
1495 return -EPERM;
1496 }
1497 dev->mtu = new_mtu;
1498
1499 if (netif_running(dev)) {
1500 mutex_lock(&mdev->state_lock);
1501 if (!mdev->device_up) {
1502 /* NIC is probably restarting - let watchdog task reset
1503 * the port */
1504 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
1505 } else {
1506 mlx4_en_stop_port(dev);
1507 err = mlx4_en_start_port(dev);
1508 if (err) {
1509 en_err(priv, "Failed restarting port:%d\n",
1510 priv->port);
1511 queue_work(mdev->workqueue, &priv->watchdog_task);
1512 }
1513 }
1514 mutex_unlock(&mdev->state_lock);
1515 }
1516 return 0;
1517 }
1518
1519 static int mlx4_en_set_features(struct net_device *netdev,
1520 netdev_features_t features)
1521 {
1522 struct mlx4_en_priv *priv = netdev_priv(netdev);
1523
1524 if (features & NETIF_F_LOOPBACK)
1525 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1526 else
1527 priv->ctrl_flags &=
1528 cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
1529
1530 return 0;
1531
1532 }
1533
1534 static const struct net_device_ops mlx4_netdev_ops = {
1535 .ndo_open = mlx4_en_open,
1536 .ndo_stop = mlx4_en_close,
1537 .ndo_start_xmit = mlx4_en_xmit,
1538 .ndo_select_queue = mlx4_en_select_queue,
1539 .ndo_get_stats = mlx4_en_get_stats,
1540 .ndo_set_rx_mode = mlx4_en_set_multicast,
1541 .ndo_set_mac_address = mlx4_en_set_mac,
1542 .ndo_validate_addr = eth_validate_addr,
1543 .ndo_change_mtu = mlx4_en_change_mtu,
1544 .ndo_tx_timeout = mlx4_en_tx_timeout,
1545 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
1546 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
1547 #ifdef CONFIG_NET_POLL_CONTROLLER
1548 .ndo_poll_controller = mlx4_en_netpoll,
1549 #endif
1550 .ndo_set_features = mlx4_en_set_features,
1551 .ndo_setup_tc = mlx4_en_setup_tc,
1552 #ifdef CONFIG_RFS_ACCEL
1553 .ndo_rx_flow_steer = mlx4_en_filter_rfs,
1554 #endif
1555 };
1556
1557 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
1558 struct mlx4_en_port_profile *prof)
1559 {
1560 struct net_device *dev;
1561 struct mlx4_en_priv *priv;
1562 int i;
1563 int err;
1564
1565 dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1566 MAX_TX_RINGS, MAX_RX_RINGS);
1567 if (dev == NULL)
1568 return -ENOMEM;
1569
1570 netif_set_real_num_tx_queues(dev, prof->tx_ring_num);
1571 netif_set_real_num_rx_queues(dev, prof->rx_ring_num);
1572
1573 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1574 dev->dev_id = port - 1;
1575
1576 /*
1577 * Initialize driver private data
1578 */
1579
1580 priv = netdev_priv(dev);
1581 memset(priv, 0, sizeof(struct mlx4_en_priv));
1582 priv->dev = dev;
1583 priv->mdev = mdev;
1584 priv->ddev = &mdev->pdev->dev;
1585 priv->prof = prof;
1586 priv->port = port;
1587 priv->port_up = false;
1588 priv->flags = prof->flags;
1589 priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
1590 MLX4_WQE_CTRL_SOLICITED);
1591 priv->num_tx_rings_p_up = mdev->profile.num_tx_rings_p_up;
1592 priv->tx_ring_num = prof->tx_ring_num;
1593
1594 priv->tx_ring = kzalloc(sizeof(struct mlx4_en_tx_ring) * MAX_TX_RINGS,
1595 GFP_KERNEL);
1596 if (!priv->tx_ring) {
1597 err = -ENOMEM;
1598 goto out;
1599 }
1600 priv->tx_cq = kzalloc(sizeof(struct mlx4_en_cq) * MAX_RX_RINGS,
1601 GFP_KERNEL);
1602 if (!priv->tx_cq) {
1603 err = -ENOMEM;
1604 goto out;
1605 }
1606 priv->rx_ring_num = prof->rx_ring_num;
1607 priv->cqe_factor = (mdev->dev->caps.cqe_size == 64) ? 1 : 0;
1608 priv->mac_index = -1;
1609 priv->msg_enable = MLX4_EN_MSG_LEVEL;
1610 spin_lock_init(&priv->stats_lock);
1611 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1612 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1613 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1614 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1615 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1616 #ifdef CONFIG_MLX4_EN_DCB
1617 if (!mlx4_is_slave(priv->mdev->dev))
1618 dev->dcbnl_ops = &mlx4_en_dcbnl_ops;
1619 #endif
1620
1621 /* Query for default mac and max mtu */
1622 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1623 priv->mac = mdev->dev->caps.def_mac[priv->port];
1624 if (ILLEGAL_MAC(priv->mac)) {
1625 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1626 priv->port, priv->mac);
1627 err = -EINVAL;
1628 goto out;
1629 }
1630
1631 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1632 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1633 err = mlx4_en_alloc_resources(priv);
1634 if (err)
1635 goto out;
1636
1637 /* Allocate page for receive rings */
1638 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1639 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1640 if (err) {
1641 en_err(priv, "Failed to allocate page for rx qps\n");
1642 goto out;
1643 }
1644 priv->allocated = 1;
1645
1646 /*
1647 * Initialize netdev entry points
1648 */
1649 dev->netdev_ops = &mlx4_netdev_ops;
1650 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1651 netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1652 netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1653
1654 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1655
1656 /* Set defualt MAC */
1657 dev->addr_len = ETH_ALEN;
1658 for (i = 0; i < ETH_ALEN; i++) {
1659 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1660 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1661 }
1662
1663 /*
1664 * Set driver features
1665 */
1666 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1667 if (mdev->LSO_support)
1668 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1669
1670 dev->vlan_features = dev->hw_features;
1671
1672 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
1673 dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1674 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1675 NETIF_F_HW_VLAN_FILTER;
1676 dev->hw_features |= NETIF_F_LOOPBACK;
1677
1678 if (mdev->dev->caps.steering_mode ==
1679 MLX4_STEERING_MODE_DEVICE_MANAGED)
1680 dev->hw_features |= NETIF_F_NTUPLE;
1681
1682 mdev->pndev[port] = dev;
1683
1684 netif_carrier_off(dev);
1685 err = register_netdev(dev);
1686 if (err) {
1687 en_err(priv, "Netdev registration failed for port %d\n", port);
1688 goto out;
1689 }
1690 priv->registered = 1;
1691
1692 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1693 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1694
1695 /* Configure port */
1696 mlx4_en_calc_rx_buf(dev);
1697 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1698 priv->rx_skb_size + ETH_FCS_LEN,
1699 prof->tx_pause, prof->tx_ppp,
1700 prof->rx_pause, prof->rx_ppp);
1701 if (err) {
1702 en_err(priv, "Failed setting port general configurations "
1703 "for port %d, with error %d\n", priv->port, err);
1704 goto out;
1705 }
1706
1707 /* Init port */
1708 en_warn(priv, "Initializing port\n");
1709 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1710 if (err) {
1711 en_err(priv, "Failed Initializing port\n");
1712 goto out;
1713 }
1714 mlx4_en_set_default_moderation(priv);
1715 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1716 return 0;
1717
1718 out:
1719 mlx4_en_destroy_netdev(dev);
1720 return err;
1721 }
1722
Linux kernel - Deliverables
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