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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[mirror_ubuntu-artful-kernel.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_REGULAR,
131 .port = priv->port,
132 .priority = MLX4_DOMAIN_RFS,
133 };
134 int rc;
135 __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
136
137 list_add_tail(&spec_eth.list, &rule.list);
138 list_add_tail(&spec_ip.list, &rule.list);
139 list_add_tail(&spec_tcp.list, &rule.list);
140
141 rule.qpn = priv->rss_map.qps[filter->rxq_index].qpn;
142 memcpy(spec_eth.eth.dst_mac, priv->dev->dev_addr, ETH_ALEN);
143 memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
144
145 filter->activated = 0;
146
147 if (filter->reg_id) {
148 rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
149 if (rc && rc != -ENOENT)
150 en_err(priv, "Error detaching flow. rc = %d\n", rc);
151 }
152
153 rc = mlx4_flow_attach(priv->mdev->dev, &rule, &filter->reg_id);
154 if (rc)
155 en_err(priv, "Error attaching flow. err = %d\n", rc);
156
157 mlx4_en_filter_rfs_expire(priv);
158
159 filter->activated = 1;
160 }
161
162 static inline struct hlist_head *
163 filter_hash_bucket(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
164 __be16 src_port, __be16 dst_port)
165 {
166 unsigned long l;
167 int bucket_idx;
168
169 l = (__force unsigned long)src_port |
170 ((__force unsigned long)dst_port << 2);
171 l ^= (__force unsigned long)(src_ip ^ dst_ip);
172
173 bucket_idx = hash_long(l, MLX4_EN_FILTER_HASH_SHIFT);
174
175 return &priv->filter_hash[bucket_idx];
176 }
177
178 static struct mlx4_en_filter *
179 mlx4_en_filter_alloc(struct mlx4_en_priv *priv, int rxq_index, __be32 src_ip,
180 __be32 dst_ip, __be16 src_port, __be16 dst_port,
181 u32 flow_id)
182 {
183 struct mlx4_en_filter *filter = NULL;
184
185 filter = kzalloc(sizeof(struct mlx4_en_filter), GFP_ATOMIC);
186 if (!filter)
187 return NULL;
188
189 filter->priv = priv;
190 filter->rxq_index = rxq_index;
191 INIT_WORK(&filter->work, mlx4_en_filter_work);
192
193 filter->src_ip = src_ip;
194 filter->dst_ip = dst_ip;
195 filter->src_port = src_port;
196 filter->dst_port = dst_port;
197
198 filter->flow_id = flow_id;
199
200 filter->id = priv->last_filter_id++ % RPS_NO_FILTER;
201
202 list_add_tail(&filter->next, &priv->filters);
203 hlist_add_head(&filter->filter_chain,
204 filter_hash_bucket(priv, src_ip, dst_ip, src_port,
205 dst_port));
206
207 return filter;
208 }
209
210 static void mlx4_en_filter_free(struct mlx4_en_filter *filter)
211 {
212 struct mlx4_en_priv *priv = filter->priv;
213 int rc;
214
215 list_del(&filter->next);
216
217 rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
218 if (rc && rc != -ENOENT)
219 en_err(priv, "Error detaching flow. rc = %d\n", rc);
220
221 kfree(filter);
222 }
223
224 static inline struct mlx4_en_filter *
225 mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
226 __be16 src_port, __be16 dst_port)
227 {
228 struct mlx4_en_filter *filter;
229 struct mlx4_en_filter *ret = NULL;
230
231 hlist_for_each_entry(filter,
232 filter_hash_bucket(priv, src_ip, dst_ip,
233 src_port, dst_port),
234 filter_chain) {
235 if (filter->src_ip == src_ip &&
236 filter->dst_ip == dst_ip &&
237 filter->src_port == src_port &&
238 filter->dst_port == dst_port) {
239 ret = filter;
240 break;
241 }
242 }
243
244 return ret;
245 }
246
247 static int
248 mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
249 u16 rxq_index, u32 flow_id)
250 {
251 struct mlx4_en_priv *priv = netdev_priv(net_dev);
252 struct mlx4_en_filter *filter;
253 const struct iphdr *ip;
254 const __be16 *ports;
255 __be32 src_ip;
256 __be32 dst_ip;
257 __be16 src_port;
258 __be16 dst_port;
259 int nhoff = skb_network_offset(skb);
260 int ret = 0;
261
262 if (skb->protocol != htons(ETH_P_IP))
263 return -EPROTONOSUPPORT;
264
265 ip = (const struct iphdr *)(skb->data + nhoff);
266 if (ip_is_fragment(ip))
267 return -EPROTONOSUPPORT;
268
269 ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
270
271 src_ip = ip->saddr;
272 dst_ip = ip->daddr;
273 src_port = ports[0];
274 dst_port = ports[1];
275
276 if (ip->protocol != IPPROTO_TCP)
277 return -EPROTONOSUPPORT;
278
279 spin_lock_bh(&priv->filters_lock);
280 filter = mlx4_en_filter_find(priv, src_ip, dst_ip, src_port, dst_port);
281 if (filter) {
282 if (filter->rxq_index == rxq_index)
283 goto out;
284
285 filter->rxq_index = rxq_index;
286 } else {
287 filter = mlx4_en_filter_alloc(priv, rxq_index,
288 src_ip, dst_ip,
289 src_port, dst_port, flow_id);
290 if (!filter) {
291 ret = -ENOMEM;
292 goto err;
293 }
294 }
295
296 queue_work(priv->mdev->workqueue, &filter->work);
297
298 out:
299 ret = filter->id;
300 err:
301 spin_unlock_bh(&priv->filters_lock);
302
303 return ret;
304 }
305
306 void mlx4_en_cleanup_filters(struct mlx4_en_priv *priv,
307 struct mlx4_en_rx_ring *rx_ring)
308 {
309 struct mlx4_en_filter *filter, *tmp;
310 LIST_HEAD(del_list);
311
312 spin_lock_bh(&priv->filters_lock);
313 list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
314 list_move(&filter->next, &del_list);
315 hlist_del(&filter->filter_chain);
316 }
317 spin_unlock_bh(&priv->filters_lock);
318
319 list_for_each_entry_safe(filter, tmp, &del_list, next) {
320 cancel_work_sync(&filter->work);
321 mlx4_en_filter_free(filter);
322 }
323 }
324
325 static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv)
326 {
327 struct mlx4_en_filter *filter = NULL, *tmp, *last_filter = NULL;
328 LIST_HEAD(del_list);
329 int i = 0;
330
331 spin_lock_bh(&priv->filters_lock);
332 list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
333 if (i > MLX4_EN_FILTER_EXPIRY_QUOTA)
334 break;
335
336 if (filter->activated &&
337 !work_pending(&filter->work) &&
338 rps_may_expire_flow(priv->dev,
339 filter->rxq_index, filter->flow_id,
340 filter->id)) {
341 list_move(&filter->next, &del_list);
342 hlist_del(&filter->filter_chain);
343 } else
344 last_filter = filter;
345
346 i++;
347 }
348
349 if (last_filter && (&last_filter->next != priv->filters.next))
350 list_move(&priv->filters, &last_filter->next);
351
352 spin_unlock_bh(&priv->filters_lock);
353
354 list_for_each_entry_safe(filter, tmp, &del_list, next)
355 mlx4_en_filter_free(filter);
356 }
357 #endif
358
359 static int mlx4_en_vlan_rx_add_vid(struct net_device *dev,
360 __be16 proto, u16 vid)
361 {
362 struct mlx4_en_priv *priv = netdev_priv(dev);
363 struct mlx4_en_dev *mdev = priv->mdev;
364 int err;
365 int idx;
366
367 en_dbg(HW, priv, "adding VLAN:%d\n", vid);
368
369 set_bit(vid, priv->active_vlans);
370
371 /* Add VID to port VLAN filter */
372 mutex_lock(&mdev->state_lock);
373 if (mdev->device_up && priv->port_up) {
374 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
375 if (err)
376 en_err(priv, "Failed configuring VLAN filter\n");
377 }
378 if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
379 en_err(priv, "failed adding vlan %d\n", vid);
380 mutex_unlock(&mdev->state_lock);
381
382 return 0;
383 }
384
385 static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev,
386 __be16 proto, u16 vid)
387 {
388 struct mlx4_en_priv *priv = netdev_priv(dev);
389 struct mlx4_en_dev *mdev = priv->mdev;
390 int err;
391 int idx;
392
393 en_dbg(HW, priv, "Killing VID:%d\n", vid);
394
395 clear_bit(vid, priv->active_vlans);
396
397 /* Remove VID from port VLAN filter */
398 mutex_lock(&mdev->state_lock);
399 if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
400 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
401 else
402 en_err(priv, "could not find vid %d in cache\n", vid);
403
404 if (mdev->device_up && priv->port_up) {
405 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
406 if (err)
407 en_err(priv, "Failed configuring VLAN filter\n");
408 }
409 mutex_unlock(&mdev->state_lock);
410
411 return 0;
412 }
413
414 static void mlx4_en_u64_to_mac(unsigned char dst_mac[ETH_ALEN + 2], u64 src_mac)
415 {
416 int i;
417 for (i = ETH_ALEN - 1; i >= 0; --i) {
418 dst_mac[i] = src_mac & 0xff;
419 src_mac >>= 8;
420 }
421 memset(&dst_mac[ETH_ALEN], 0, 2);
422 }
423
424 static int mlx4_en_uc_steer_add(struct mlx4_en_priv *priv,
425 unsigned char *mac, int *qpn, u64 *reg_id)
426 {
427 struct mlx4_en_dev *mdev = priv->mdev;
428 struct mlx4_dev *dev = mdev->dev;
429 int err;
430
431 switch (dev->caps.steering_mode) {
432 case MLX4_STEERING_MODE_B0: {
433 struct mlx4_qp qp;
434 u8 gid[16] = {0};
435
436 qp.qpn = *qpn;
437 memcpy(&gid[10], mac, ETH_ALEN);
438 gid[5] = priv->port;
439
440 err = mlx4_unicast_attach(dev, &qp, gid, 0, MLX4_PROT_ETH);
441 break;
442 }
443 case MLX4_STEERING_MODE_DEVICE_MANAGED: {
444 struct mlx4_spec_list spec_eth = { {NULL} };
445 __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
446
447 struct mlx4_net_trans_rule rule = {
448 .queue_mode = MLX4_NET_TRANS_Q_FIFO,
449 .exclusive = 0,
450 .allow_loopback = 1,
451 .promisc_mode = MLX4_FS_REGULAR,
452 .priority = MLX4_DOMAIN_NIC,
453 };
454
455 rule.port = priv->port;
456 rule.qpn = *qpn;
457 INIT_LIST_HEAD(&rule.list);
458
459 spec_eth.id = MLX4_NET_TRANS_RULE_ID_ETH;
460 memcpy(spec_eth.eth.dst_mac, mac, ETH_ALEN);
461 memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
462 list_add_tail(&spec_eth.list, &rule.list);
463
464 err = mlx4_flow_attach(dev, &rule, reg_id);
465 break;
466 }
467 default:
468 return -EINVAL;
469 }
470 if (err)
471 en_warn(priv, "Failed Attaching Unicast\n");
472
473 return err;
474 }
475
476 static void mlx4_en_uc_steer_release(struct mlx4_en_priv *priv,
477 unsigned char *mac, int qpn, u64 reg_id)
478 {
479 struct mlx4_en_dev *mdev = priv->mdev;
480 struct mlx4_dev *dev = mdev->dev;
481
482 switch (dev->caps.steering_mode) {
483 case MLX4_STEERING_MODE_B0: {
484 struct mlx4_qp qp;
485 u8 gid[16] = {0};
486
487 qp.qpn = qpn;
488 memcpy(&gid[10], mac, ETH_ALEN);
489 gid[5] = priv->port;
490
491 mlx4_unicast_detach(dev, &qp, gid, MLX4_PROT_ETH);
492 break;
493 }
494 case MLX4_STEERING_MODE_DEVICE_MANAGED: {
495 mlx4_flow_detach(dev, reg_id);
496 break;
497 }
498 default:
499 en_err(priv, "Invalid steering mode.\n");
500 }
501 }
502
503 static int mlx4_en_get_qp(struct mlx4_en_priv *priv)
504 {
505 struct mlx4_en_dev *mdev = priv->mdev;
506 struct mlx4_dev *dev = mdev->dev;
507 struct mlx4_mac_entry *entry;
508 int index = 0;
509 int err = 0;
510 u64 reg_id;
511 int *qpn = &priv->base_qpn;
512 u64 mac = mlx4_en_mac_to_u64(priv->dev->dev_addr);
513
514 en_dbg(DRV, priv, "Registering MAC: %pM for adding\n",
515 priv->dev->dev_addr);
516 index = mlx4_register_mac(dev, priv->port, mac);
517 if (index < 0) {
518 err = index;
519 en_err(priv, "Failed adding MAC: %pM\n",
520 priv->dev->dev_addr);
521 return err;
522 }
523
524 if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
525 int base_qpn = mlx4_get_base_qpn(dev, priv->port);
526 *qpn = base_qpn + index;
527 return 0;
528 }
529
530 err = mlx4_qp_reserve_range(dev, 1, 1, qpn);
531 en_dbg(DRV, priv, "Reserved qp %d\n", *qpn);
532 if (err) {
533 en_err(priv, "Failed to reserve qp for mac registration\n");
534 goto qp_err;
535 }
536
537 err = mlx4_en_uc_steer_add(priv, priv->dev->dev_addr, qpn, &reg_id);
538 if (err)
539 goto steer_err;
540
541 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
542 if (!entry) {
543 err = -ENOMEM;
544 goto alloc_err;
545 }
546 memcpy(entry->mac, priv->dev->dev_addr, sizeof(entry->mac));
547 entry->reg_id = reg_id;
548
549 hlist_add_head_rcu(&entry->hlist,
550 &priv->mac_hash[entry->mac[MLX4_EN_MAC_HASH_IDX]]);
551
552 return 0;
553
554 alloc_err:
555 mlx4_en_uc_steer_release(priv, priv->dev->dev_addr, *qpn, reg_id);
556
557 steer_err:
558 mlx4_qp_release_range(dev, *qpn, 1);
559
560 qp_err:
561 mlx4_unregister_mac(dev, priv->port, mac);
562 return err;
563 }
564
565 static void mlx4_en_put_qp(struct mlx4_en_priv *priv)
566 {
567 struct mlx4_en_dev *mdev = priv->mdev;
568 struct mlx4_dev *dev = mdev->dev;
569 int qpn = priv->base_qpn;
570 u64 mac;
571
572 if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
573 mac = mlx4_en_mac_to_u64(priv->dev->dev_addr);
574 en_dbg(DRV, priv, "Registering MAC: %pM for deleting\n",
575 priv->dev->dev_addr);
576 mlx4_unregister_mac(dev, priv->port, mac);
577 } else {
578 struct mlx4_mac_entry *entry;
579 struct hlist_node *tmp;
580 struct hlist_head *bucket;
581 unsigned int i;
582
583 for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
584 bucket = &priv->mac_hash[i];
585 hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
586 mac = mlx4_en_mac_to_u64(entry->mac);
587 en_dbg(DRV, priv, "Registering MAC: %pM for deleting\n",
588 entry->mac);
589 mlx4_en_uc_steer_release(priv, entry->mac,
590 qpn, entry->reg_id);
591
592 mlx4_unregister_mac(dev, priv->port, mac);
593 hlist_del_rcu(&entry->hlist);
594 kfree_rcu(entry, rcu);
595 }
596 }
597
598 en_dbg(DRV, priv, "Releasing qp: port %d, qpn %d\n",
599 priv->port, qpn);
600 mlx4_qp_release_range(dev, qpn, 1);
601 priv->flags &= ~MLX4_EN_FLAG_FORCE_PROMISC;
602 }
603 }
604
605 static int mlx4_en_replace_mac(struct mlx4_en_priv *priv, int qpn,
606 unsigned char *new_mac, unsigned char *prev_mac)
607 {
608 struct mlx4_en_dev *mdev = priv->mdev;
609 struct mlx4_dev *dev = mdev->dev;
610 int err = 0;
611 u64 new_mac_u64 = mlx4_en_mac_to_u64(new_mac);
612
613 if (dev->caps.steering_mode != MLX4_STEERING_MODE_A0) {
614 struct hlist_head *bucket;
615 unsigned int mac_hash;
616 struct mlx4_mac_entry *entry;
617 struct hlist_node *tmp;
618 u64 prev_mac_u64 = mlx4_en_mac_to_u64(prev_mac);
619
620 bucket = &priv->mac_hash[prev_mac[MLX4_EN_MAC_HASH_IDX]];
621 hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
622 if (ether_addr_equal_64bits(entry->mac, prev_mac)) {
623 mlx4_en_uc_steer_release(priv, entry->mac,
624 qpn, entry->reg_id);
625 mlx4_unregister_mac(dev, priv->port,
626 prev_mac_u64);
627 hlist_del_rcu(&entry->hlist);
628 synchronize_rcu();
629 memcpy(entry->mac, new_mac, ETH_ALEN);
630 entry->reg_id = 0;
631 mac_hash = new_mac[MLX4_EN_MAC_HASH_IDX];
632 hlist_add_head_rcu(&entry->hlist,
633 &priv->mac_hash[mac_hash]);
634 mlx4_register_mac(dev, priv->port, new_mac_u64);
635 err = mlx4_en_uc_steer_add(priv, new_mac,
636 &qpn,
637 &entry->reg_id);
638 return err;
639 }
640 }
641 return -EINVAL;
642 }
643
644 return __mlx4_replace_mac(dev, priv->port, qpn, new_mac_u64);
645 }
646
647 u64 mlx4_en_mac_to_u64(u8 *addr)
648 {
649 u64 mac = 0;
650 int i;
651
652 for (i = 0; i < ETH_ALEN; i++) {
653 mac <<= 8;
654 mac |= addr[i];
655 }
656 return mac;
657 }
658
659 static int mlx4_en_do_set_mac(struct mlx4_en_priv *priv)
660 {
661 int err = 0;
662
663 if (priv->port_up) {
664 /* Remove old MAC and insert the new one */
665 err = mlx4_en_replace_mac(priv, priv->base_qpn,
666 priv->dev->dev_addr, priv->prev_mac);
667 if (err)
668 en_err(priv, "Failed changing HW MAC address\n");
669 memcpy(priv->prev_mac, priv->dev->dev_addr,
670 sizeof(priv->prev_mac));
671 } else
672 en_dbg(HW, priv, "Port is down while registering mac, exiting...\n");
673
674 return err;
675 }
676
677 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
678 {
679 struct mlx4_en_priv *priv = netdev_priv(dev);
680 struct mlx4_en_dev *mdev = priv->mdev;
681 struct sockaddr *saddr = addr;
682 int err;
683
684 if (!is_valid_ether_addr(saddr->sa_data))
685 return -EADDRNOTAVAIL;
686
687 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
688
689 mutex_lock(&mdev->state_lock);
690 err = mlx4_en_do_set_mac(priv);
691 mutex_unlock(&mdev->state_lock);
692
693 return err;
694 }
695
696 static void mlx4_en_clear_list(struct net_device *dev)
697 {
698 struct mlx4_en_priv *priv = netdev_priv(dev);
699 struct mlx4_en_mc_list *tmp, *mc_to_del;
700
701 list_for_each_entry_safe(mc_to_del, tmp, &priv->mc_list, list) {
702 list_del(&mc_to_del->list);
703 kfree(mc_to_del);
704 }
705 }
706
707 static void mlx4_en_cache_mclist(struct net_device *dev)
708 {
709 struct mlx4_en_priv *priv = netdev_priv(dev);
710 struct netdev_hw_addr *ha;
711 struct mlx4_en_mc_list *tmp;
712
713 mlx4_en_clear_list(dev);
714 netdev_for_each_mc_addr(ha, dev) {
715 tmp = kzalloc(sizeof(struct mlx4_en_mc_list), GFP_ATOMIC);
716 if (!tmp) {
717 mlx4_en_clear_list(dev);
718 return;
719 }
720 memcpy(tmp->addr, ha->addr, ETH_ALEN);
721 list_add_tail(&tmp->list, &priv->mc_list);
722 }
723 }
724
725 static void update_mclist_flags(struct mlx4_en_priv *priv,
726 struct list_head *dst,
727 struct list_head *src)
728 {
729 struct mlx4_en_mc_list *dst_tmp, *src_tmp, *new_mc;
730 bool found;
731
732 /* Find all the entries that should be removed from dst,
733 * These are the entries that are not found in src
734 */
735 list_for_each_entry(dst_tmp, dst, list) {
736 found = false;
737 list_for_each_entry(src_tmp, src, list) {
738 if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
739 found = true;
740 break;
741 }
742 }
743 if (!found)
744 dst_tmp->action = MCLIST_REM;
745 }
746
747 /* Add entries that exist in src but not in dst
748 * mark them as need to add
749 */
750 list_for_each_entry(src_tmp, src, list) {
751 found = false;
752 list_for_each_entry(dst_tmp, dst, list) {
753 if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
754 dst_tmp->action = MCLIST_NONE;
755 found = true;
756 break;
757 }
758 }
759 if (!found) {
760 new_mc = kmemdup(src_tmp,
761 sizeof(struct mlx4_en_mc_list),
762 GFP_KERNEL);
763 if (!new_mc)
764 return;
765
766 new_mc->action = MCLIST_ADD;
767 list_add_tail(&new_mc->list, dst);
768 }
769 }
770 }
771
772 static void mlx4_en_set_rx_mode(struct net_device *dev)
773 {
774 struct mlx4_en_priv *priv = netdev_priv(dev);
775
776 if (!priv->port_up)
777 return;
778
779 queue_work(priv->mdev->workqueue, &priv->rx_mode_task);
780 }
781
782 static void mlx4_en_set_promisc_mode(struct mlx4_en_priv *priv,
783 struct mlx4_en_dev *mdev)
784 {
785 int err = 0;
786
787 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
788 if (netif_msg_rx_status(priv))
789 en_warn(priv, "Entering promiscuous mode\n");
790 priv->flags |= MLX4_EN_FLAG_PROMISC;
791
792 /* Enable promiscouos mode */
793 switch (mdev->dev->caps.steering_mode) {
794 case MLX4_STEERING_MODE_DEVICE_MANAGED:
795 err = mlx4_flow_steer_promisc_add(mdev->dev,
796 priv->port,
797 priv->base_qpn,
798 MLX4_FS_ALL_DEFAULT);
799 if (err)
800 en_err(priv, "Failed enabling promiscuous mode\n");
801 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
802 break;
803
804 case MLX4_STEERING_MODE_B0:
805 err = mlx4_unicast_promisc_add(mdev->dev,
806 priv->base_qpn,
807 priv->port);
808 if (err)
809 en_err(priv, "Failed enabling unicast promiscuous mode\n");
810
811 /* Add the default qp number as multicast
812 * promisc
813 */
814 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
815 err = mlx4_multicast_promisc_add(mdev->dev,
816 priv->base_qpn,
817 priv->port);
818 if (err)
819 en_err(priv, "Failed enabling multicast promiscuous mode\n");
820 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
821 }
822 break;
823
824 case MLX4_STEERING_MODE_A0:
825 err = mlx4_SET_PORT_qpn_calc(mdev->dev,
826 priv->port,
827 priv->base_qpn,
828 1);
829 if (err)
830 en_err(priv, "Failed enabling promiscuous mode\n");
831 break;
832 }
833
834 /* Disable port multicast filter (unconditionally) */
835 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
836 0, MLX4_MCAST_DISABLE);
837 if (err)
838 en_err(priv, "Failed disabling multicast filter\n");
839
840 /* Disable port VLAN filter */
841 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
842 if (err)
843 en_err(priv, "Failed disabling VLAN filter\n");
844 }
845 }
846
847 static void mlx4_en_clear_promisc_mode(struct mlx4_en_priv *priv,
848 struct mlx4_en_dev *mdev)
849 {
850 int err = 0;
851
852 if (netif_msg_rx_status(priv))
853 en_warn(priv, "Leaving promiscuous mode\n");
854 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
855
856 /* Disable promiscouos mode */
857 switch (mdev->dev->caps.steering_mode) {
858 case MLX4_STEERING_MODE_DEVICE_MANAGED:
859 err = mlx4_flow_steer_promisc_remove(mdev->dev,
860 priv->port,
861 MLX4_FS_ALL_DEFAULT);
862 if (err)
863 en_err(priv, "Failed disabling promiscuous mode\n");
864 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
865 break;
866
867 case MLX4_STEERING_MODE_B0:
868 err = mlx4_unicast_promisc_remove(mdev->dev,
869 priv->base_qpn,
870 priv->port);
871 if (err)
872 en_err(priv, "Failed disabling unicast promiscuous mode\n");
873 /* Disable Multicast promisc */
874 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
875 err = mlx4_multicast_promisc_remove(mdev->dev,
876 priv->base_qpn,
877 priv->port);
878 if (err)
879 en_err(priv, "Failed disabling multicast promiscuous mode\n");
880 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
881 }
882 break;
883
884 case MLX4_STEERING_MODE_A0:
885 err = mlx4_SET_PORT_qpn_calc(mdev->dev,
886 priv->port,
887 priv->base_qpn, 0);
888 if (err)
889 en_err(priv, "Failed disabling promiscuous mode\n");
890 break;
891 }
892
893 /* Enable port VLAN filter */
894 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
895 if (err)
896 en_err(priv, "Failed enabling VLAN filter\n");
897 }
898
899 static void mlx4_en_do_multicast(struct mlx4_en_priv *priv,
900 struct net_device *dev,
901 struct mlx4_en_dev *mdev)
902 {
903 struct mlx4_en_mc_list *mclist, *tmp;
904 u64 mcast_addr = 0;
905 u8 mc_list[16] = {0};
906 int err = 0;
907
908 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
909 if (dev->flags & IFF_ALLMULTI) {
910 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
911 0, MLX4_MCAST_DISABLE);
912 if (err)
913 en_err(priv, "Failed disabling multicast filter\n");
914
915 /* Add the default qp number as multicast promisc */
916 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
917 switch (mdev->dev->caps.steering_mode) {
918 case MLX4_STEERING_MODE_DEVICE_MANAGED:
919 err = mlx4_flow_steer_promisc_add(mdev->dev,
920 priv->port,
921 priv->base_qpn,
922 MLX4_FS_MC_DEFAULT);
923 break;
924
925 case MLX4_STEERING_MODE_B0:
926 err = mlx4_multicast_promisc_add(mdev->dev,
927 priv->base_qpn,
928 priv->port);
929 break;
930
931 case MLX4_STEERING_MODE_A0:
932 break;
933 }
934 if (err)
935 en_err(priv, "Failed entering multicast promisc mode\n");
936 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
937 }
938 } else {
939 /* Disable Multicast promisc */
940 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
941 switch (mdev->dev->caps.steering_mode) {
942 case MLX4_STEERING_MODE_DEVICE_MANAGED:
943 err = mlx4_flow_steer_promisc_remove(mdev->dev,
944 priv->port,
945 MLX4_FS_MC_DEFAULT);
946 break;
947
948 case MLX4_STEERING_MODE_B0:
949 err = mlx4_multicast_promisc_remove(mdev->dev,
950 priv->base_qpn,
951 priv->port);
952 break;
953
954 case MLX4_STEERING_MODE_A0:
955 break;
956 }
957 if (err)
958 en_err(priv, "Failed disabling multicast promiscuous mode\n");
959 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
960 }
961
962 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
963 0, MLX4_MCAST_DISABLE);
964 if (err)
965 en_err(priv, "Failed disabling multicast filter\n");
966
967 /* Flush mcast filter and init it with broadcast address */
968 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
969 1, MLX4_MCAST_CONFIG);
970
971 /* Update multicast list - we cache all addresses so they won't
972 * change while HW is updated holding the command semaphor */
973 netif_addr_lock_bh(dev);
974 mlx4_en_cache_mclist(dev);
975 netif_addr_unlock_bh(dev);
976 list_for_each_entry(mclist, &priv->mc_list, list) {
977 mcast_addr = mlx4_en_mac_to_u64(mclist->addr);
978 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
979 mcast_addr, 0, MLX4_MCAST_CONFIG);
980 }
981 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
982 0, MLX4_MCAST_ENABLE);
983 if (err)
984 en_err(priv, "Failed enabling multicast filter\n");
985
986 update_mclist_flags(priv, &priv->curr_list, &priv->mc_list);
987 list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
988 if (mclist->action == MCLIST_REM) {
989 /* detach this address and delete from list */
990 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
991 mc_list[5] = priv->port;
992 err = mlx4_multicast_detach(mdev->dev,
993 &priv->rss_map.indir_qp,
994 mc_list,
995 MLX4_PROT_ETH,
996 mclist->reg_id);
997 if (err)
998 en_err(priv, "Fail to detach multicast address\n");
999
1000 /* remove from list */
1001 list_del(&mclist->list);
1002 kfree(mclist);
1003 } else if (mclist->action == MCLIST_ADD) {
1004 /* attach the address */
1005 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
1006 /* needed for B0 steering support */
1007 mc_list[5] = priv->port;
1008 err = mlx4_multicast_attach(mdev->dev,
1009 &priv->rss_map.indir_qp,
1010 mc_list,
1011 priv->port, 0,
1012 MLX4_PROT_ETH,
1013 &mclist->reg_id);
1014 if (err)
1015 en_err(priv, "Fail to attach multicast address\n");
1016
1017 }
1018 }
1019 }
1020 }
1021
1022 static void mlx4_en_do_uc_filter(struct mlx4_en_priv *priv,
1023 struct net_device *dev,
1024 struct mlx4_en_dev *mdev)
1025 {
1026 struct netdev_hw_addr *ha;
1027 struct mlx4_mac_entry *entry;
1028 struct hlist_node *tmp;
1029 bool found;
1030 u64 mac;
1031 int err = 0;
1032 struct hlist_head *bucket;
1033 unsigned int i;
1034 int removed = 0;
1035 u32 prev_flags;
1036
1037 /* Note that we do not need to protect our mac_hash traversal with rcu,
1038 * since all modification code is protected by mdev->state_lock
1039 */
1040
1041 /* find what to remove */
1042 for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
1043 bucket = &priv->mac_hash[i];
1044 hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
1045 found = false;
1046 netdev_for_each_uc_addr(ha, dev) {
1047 if (ether_addr_equal_64bits(entry->mac,
1048 ha->addr)) {
1049 found = true;
1050 break;
1051 }
1052 }
1053
1054 /* MAC address of the port is not in uc list */
1055 if (ether_addr_equal_64bits(entry->mac, dev->dev_addr))
1056 found = true;
1057
1058 if (!found) {
1059 mac = mlx4_en_mac_to_u64(entry->mac);
1060 mlx4_en_uc_steer_release(priv, entry->mac,
1061 priv->base_qpn,
1062 entry->reg_id);
1063 mlx4_unregister_mac(mdev->dev, priv->port, mac);
1064
1065 hlist_del_rcu(&entry->hlist);
1066 kfree_rcu(entry, rcu);
1067 en_dbg(DRV, priv, "Removed MAC %pM on port:%d\n",
1068 entry->mac, priv->port);
1069 ++removed;
1070 }
1071 }
1072 }
1073
1074 /* if we didn't remove anything, there is no use in trying to add
1075 * again once we are in a forced promisc mode state
1076 */
1077 if ((priv->flags & MLX4_EN_FLAG_FORCE_PROMISC) && 0 == removed)
1078 return;
1079
1080 prev_flags = priv->flags;
1081 priv->flags &= ~MLX4_EN_FLAG_FORCE_PROMISC;
1082
1083 /* find what to add */
1084 netdev_for_each_uc_addr(ha, dev) {
1085 found = false;
1086 bucket = &priv->mac_hash[ha->addr[MLX4_EN_MAC_HASH_IDX]];
1087 hlist_for_each_entry(entry, bucket, hlist) {
1088 if (ether_addr_equal_64bits(entry->mac, ha->addr)) {
1089 found = true;
1090 break;
1091 }
1092 }
1093
1094 if (!found) {
1095 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
1096 if (!entry) {
1097 en_err(priv, "Failed adding MAC %pM on port:%d (out of memory)\n",
1098 ha->addr, priv->port);
1099 priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
1100 break;
1101 }
1102 mac = mlx4_en_mac_to_u64(ha->addr);
1103 memcpy(entry->mac, ha->addr, ETH_ALEN);
1104 err = mlx4_register_mac(mdev->dev, priv->port, mac);
1105 if (err < 0) {
1106 en_err(priv, "Failed registering MAC %pM on port %d: %d\n",
1107 ha->addr, priv->port, err);
1108 kfree(entry);
1109 priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
1110 break;
1111 }
1112 err = mlx4_en_uc_steer_add(priv, ha->addr,
1113 &priv->base_qpn,
1114 &entry->reg_id);
1115 if (err) {
1116 en_err(priv, "Failed adding MAC %pM on port %d: %d\n",
1117 ha->addr, priv->port, err);
1118 mlx4_unregister_mac(mdev->dev, priv->port, mac);
1119 kfree(entry);
1120 priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
1121 break;
1122 } else {
1123 unsigned int mac_hash;
1124 en_dbg(DRV, priv, "Added MAC %pM on port:%d\n",
1125 ha->addr, priv->port);
1126 mac_hash = ha->addr[MLX4_EN_MAC_HASH_IDX];
1127 bucket = &priv->mac_hash[mac_hash];
1128 hlist_add_head_rcu(&entry->hlist, bucket);
1129 }
1130 }
1131 }
1132
1133 if (priv->flags & MLX4_EN_FLAG_FORCE_PROMISC) {
1134 en_warn(priv, "Forcing promiscuous mode on port:%d\n",
1135 priv->port);
1136 } else if (prev_flags & MLX4_EN_FLAG_FORCE_PROMISC) {
1137 en_warn(priv, "Stop forcing promiscuous mode on port:%d\n",
1138 priv->port);
1139 }
1140 }
1141
1142 static void mlx4_en_do_set_rx_mode(struct work_struct *work)
1143 {
1144 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1145 rx_mode_task);
1146 struct mlx4_en_dev *mdev = priv->mdev;
1147 struct net_device *dev = priv->dev;
1148
1149 mutex_lock(&mdev->state_lock);
1150 if (!mdev->device_up) {
1151 en_dbg(HW, priv, "Card is not up, ignoring rx mode change.\n");
1152 goto out;
1153 }
1154 if (!priv->port_up) {
1155 en_dbg(HW, priv, "Port is down, ignoring rx mode change.\n");
1156 goto out;
1157 }
1158
1159 if (!netif_carrier_ok(dev)) {
1160 if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
1161 if (priv->port_state.link_state) {
1162 priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
1163 netif_carrier_on(dev);
1164 en_dbg(LINK, priv, "Link Up\n");
1165 }
1166 }
1167 }
1168
1169 if (dev->priv_flags & IFF_UNICAST_FLT)
1170 mlx4_en_do_uc_filter(priv, dev, mdev);
1171
1172 /* Promsicuous mode: disable all filters */
1173 if ((dev->flags & IFF_PROMISC) ||
1174 (priv->flags & MLX4_EN_FLAG_FORCE_PROMISC)) {
1175 mlx4_en_set_promisc_mode(priv, mdev);
1176 goto out;
1177 }
1178
1179 /* Not in promiscuous mode */
1180 if (priv->flags & MLX4_EN_FLAG_PROMISC)
1181 mlx4_en_clear_promisc_mode(priv, mdev);
1182
1183 mlx4_en_do_multicast(priv, dev, mdev);
1184 out:
1185 mutex_unlock(&mdev->state_lock);
1186 }
1187
1188 #ifdef CONFIG_NET_POLL_CONTROLLER
1189 static void mlx4_en_netpoll(struct net_device *dev)
1190 {
1191 struct mlx4_en_priv *priv = netdev_priv(dev);
1192 struct mlx4_en_cq *cq;
1193 unsigned long flags;
1194 int i;
1195
1196 for (i = 0; i < priv->rx_ring_num; i++) {
1197 cq = &priv->rx_cq[i];
1198 spin_lock_irqsave(&cq->lock, flags);
1199 napi_synchronize(&cq->napi);
1200 mlx4_en_process_rx_cq(dev, cq, 0);
1201 spin_unlock_irqrestore(&cq->lock, flags);
1202 }
1203 }
1204 #endif
1205
1206 static void mlx4_en_tx_timeout(struct net_device *dev)
1207 {
1208 struct mlx4_en_priv *priv = netdev_priv(dev);
1209 struct mlx4_en_dev *mdev = priv->mdev;
1210
1211 if (netif_msg_timer(priv))
1212 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
1213
1214 priv->port_stats.tx_timeout++;
1215 en_dbg(DRV, priv, "Scheduling watchdog\n");
1216 queue_work(mdev->workqueue, &priv->watchdog_task);
1217 }
1218
1219
1220 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
1221 {
1222 struct mlx4_en_priv *priv = netdev_priv(dev);
1223
1224 spin_lock_bh(&priv->stats_lock);
1225 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
1226 spin_unlock_bh(&priv->stats_lock);
1227
1228 return &priv->ret_stats;
1229 }
1230
1231 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
1232 {
1233 struct mlx4_en_cq *cq;
1234 int i;
1235
1236 /* If we haven't received a specific coalescing setting
1237 * (module param), we set the moderation parameters as follows:
1238 * - moder_cnt is set to the number of mtu sized packets to
1239 * satisfy our coalescing target.
1240 * - moder_time is set to a fixed value.
1241 */
1242 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
1243 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
1244 priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
1245 priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
1246 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - rx_frames:%d rx_usecs:%d\n",
1247 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
1248
1249 /* Setup cq moderation params */
1250 for (i = 0; i < priv->rx_ring_num; i++) {
1251 cq = &priv->rx_cq[i];
1252 cq->moder_cnt = priv->rx_frames;
1253 cq->moder_time = priv->rx_usecs;
1254 priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
1255 priv->last_moder_packets[i] = 0;
1256 priv->last_moder_bytes[i] = 0;
1257 }
1258
1259 for (i = 0; i < priv->tx_ring_num; i++) {
1260 cq = &priv->tx_cq[i];
1261 cq->moder_cnt = priv->tx_frames;
1262 cq->moder_time = priv->tx_usecs;
1263 }
1264
1265 /* Reset auto-moderation params */
1266 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
1267 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
1268 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
1269 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
1270 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
1271 priv->adaptive_rx_coal = 1;
1272 priv->last_moder_jiffies = 0;
1273 priv->last_moder_tx_packets = 0;
1274 }
1275
1276 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
1277 {
1278 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
1279 struct mlx4_en_cq *cq;
1280 unsigned long packets;
1281 unsigned long rate;
1282 unsigned long avg_pkt_size;
1283 unsigned long rx_packets;
1284 unsigned long rx_bytes;
1285 unsigned long rx_pkt_diff;
1286 int moder_time;
1287 int ring, err;
1288
1289 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
1290 return;
1291
1292 for (ring = 0; ring < priv->rx_ring_num; ring++) {
1293 spin_lock_bh(&priv->stats_lock);
1294 rx_packets = priv->rx_ring[ring].packets;
1295 rx_bytes = priv->rx_ring[ring].bytes;
1296 spin_unlock_bh(&priv->stats_lock);
1297
1298 rx_pkt_diff = ((unsigned long) (rx_packets -
1299 priv->last_moder_packets[ring]));
1300 packets = rx_pkt_diff;
1301 rate = packets * HZ / period;
1302 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
1303 priv->last_moder_bytes[ring])) / packets : 0;
1304
1305 /* Apply auto-moderation only when packet rate
1306 * exceeds a rate that it matters */
1307 if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
1308 avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
1309 if (rate < priv->pkt_rate_low)
1310 moder_time = priv->rx_usecs_low;
1311 else if (rate > priv->pkt_rate_high)
1312 moder_time = priv->rx_usecs_high;
1313 else
1314 moder_time = (rate - priv->pkt_rate_low) *
1315 (priv->rx_usecs_high - priv->rx_usecs_low) /
1316 (priv->pkt_rate_high - priv->pkt_rate_low) +
1317 priv->rx_usecs_low;
1318 } else {
1319 moder_time = priv->rx_usecs_low;
1320 }
1321
1322 if (moder_time != priv->last_moder_time[ring]) {
1323 priv->last_moder_time[ring] = moder_time;
1324 cq = &priv->rx_cq[ring];
1325 cq->moder_time = moder_time;
1326 err = mlx4_en_set_cq_moder(priv, cq);
1327 if (err)
1328 en_err(priv, "Failed modifying moderation for cq:%d\n",
1329 ring);
1330 }
1331 priv->last_moder_packets[ring] = rx_packets;
1332 priv->last_moder_bytes[ring] = rx_bytes;
1333 }
1334
1335 priv->last_moder_jiffies = jiffies;
1336 }
1337
1338 static void mlx4_en_do_get_stats(struct work_struct *work)
1339 {
1340 struct delayed_work *delay = to_delayed_work(work);
1341 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
1342 stats_task);
1343 struct mlx4_en_dev *mdev = priv->mdev;
1344 int err;
1345
1346 mutex_lock(&mdev->state_lock);
1347 if (mdev->device_up) {
1348 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
1349 if (err)
1350 en_dbg(HW, priv, "Could not update stats\n");
1351
1352 if (priv->port_up)
1353 mlx4_en_auto_moderation(priv);
1354
1355 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1356 }
1357 if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
1358 mlx4_en_do_set_mac(priv);
1359 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
1360 }
1361 mutex_unlock(&mdev->state_lock);
1362 }
1363
1364 /* mlx4_en_service_task - Run service task for tasks that needed to be done
1365 * periodically
1366 */
1367 static void mlx4_en_service_task(struct work_struct *work)
1368 {
1369 struct delayed_work *delay = to_delayed_work(work);
1370 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
1371 service_task);
1372 struct mlx4_en_dev *mdev = priv->mdev;
1373
1374 mutex_lock(&mdev->state_lock);
1375 if (mdev->device_up) {
1376 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
1377 mlx4_en_ptp_overflow_check(mdev);
1378
1379 queue_delayed_work(mdev->workqueue, &priv->service_task,
1380 SERVICE_TASK_DELAY);
1381 }
1382 mutex_unlock(&mdev->state_lock);
1383 }
1384
1385 static void mlx4_en_linkstate(struct work_struct *work)
1386 {
1387 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1388 linkstate_task);
1389 struct mlx4_en_dev *mdev = priv->mdev;
1390 int linkstate = priv->link_state;
1391
1392 mutex_lock(&mdev->state_lock);
1393 /* If observable port state changed set carrier state and
1394 * report to system log */
1395 if (priv->last_link_state != linkstate) {
1396 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
1397 en_info(priv, "Link Down\n");
1398 netif_carrier_off(priv->dev);
1399 } else {
1400 en_info(priv, "Link Up\n");
1401 netif_carrier_on(priv->dev);
1402 }
1403 }
1404 priv->last_link_state = linkstate;
1405 mutex_unlock(&mdev->state_lock);
1406 }
1407
1408
1409 int mlx4_en_start_port(struct net_device *dev)
1410 {
1411 struct mlx4_en_priv *priv = netdev_priv(dev);
1412 struct mlx4_en_dev *mdev = priv->mdev;
1413 struct mlx4_en_cq *cq;
1414 struct mlx4_en_tx_ring *tx_ring;
1415 int rx_index = 0;
1416 int tx_index = 0;
1417 int err = 0;
1418 int i;
1419 int j;
1420 u8 mc_list[16] = {0};
1421
1422 if (priv->port_up) {
1423 en_dbg(DRV, priv, "start port called while port already up\n");
1424 return 0;
1425 }
1426
1427 INIT_LIST_HEAD(&priv->mc_list);
1428 INIT_LIST_HEAD(&priv->curr_list);
1429 INIT_LIST_HEAD(&priv->ethtool_list);
1430 memset(&priv->ethtool_rules[0], 0,
1431 sizeof(struct ethtool_flow_id) * MAX_NUM_OF_FS_RULES);
1432
1433 /* Calculate Rx buf size */
1434 dev->mtu = min(dev->mtu, priv->max_mtu);
1435 mlx4_en_calc_rx_buf(dev);
1436 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
1437
1438 /* Configure rx cq's and rings */
1439 err = mlx4_en_activate_rx_rings(priv);
1440 if (err) {
1441 en_err(priv, "Failed to activate RX rings\n");
1442 return err;
1443 }
1444 for (i = 0; i < priv->rx_ring_num; i++) {
1445 cq = &priv->rx_cq[i];
1446
1447 err = mlx4_en_activate_cq(priv, cq, i);
1448 if (err) {
1449 en_err(priv, "Failed activating Rx CQ\n");
1450 goto cq_err;
1451 }
1452 for (j = 0; j < cq->size; j++)
1453 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
1454 err = mlx4_en_set_cq_moder(priv, cq);
1455 if (err) {
1456 en_err(priv, "Failed setting cq moderation parameters");
1457 mlx4_en_deactivate_cq(priv, cq);
1458 goto cq_err;
1459 }
1460 mlx4_en_arm_cq(priv, cq);
1461 priv->rx_ring[i].cqn = cq->mcq.cqn;
1462 ++rx_index;
1463 }
1464
1465 /* Set qp number */
1466 en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
1467 err = mlx4_en_get_qp(priv);
1468 if (err) {
1469 en_err(priv, "Failed getting eth qp\n");
1470 goto cq_err;
1471 }
1472 mdev->mac_removed[priv->port] = 0;
1473
1474 err = mlx4_en_config_rss_steer(priv);
1475 if (err) {
1476 en_err(priv, "Failed configuring rss steering\n");
1477 goto mac_err;
1478 }
1479
1480 err = mlx4_en_create_drop_qp(priv);
1481 if (err)
1482 goto rss_err;
1483
1484 /* Configure tx cq's and rings */
1485 for (i = 0; i < priv->tx_ring_num; i++) {
1486 /* Configure cq */
1487 cq = &priv->tx_cq[i];
1488 err = mlx4_en_activate_cq(priv, cq, i);
1489 if (err) {
1490 en_err(priv, "Failed allocating Tx CQ\n");
1491 goto tx_err;
1492 }
1493 err = mlx4_en_set_cq_moder(priv, cq);
1494 if (err) {
1495 en_err(priv, "Failed setting cq moderation parameters");
1496 mlx4_en_deactivate_cq(priv, cq);
1497 goto tx_err;
1498 }
1499 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
1500 cq->buf->wqe_index = cpu_to_be16(0xffff);
1501
1502 /* Configure ring */
1503 tx_ring = &priv->tx_ring[i];
1504 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
1505 i / priv->num_tx_rings_p_up);
1506 if (err) {
1507 en_err(priv, "Failed allocating Tx ring\n");
1508 mlx4_en_deactivate_cq(priv, cq);
1509 goto tx_err;
1510 }
1511 tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
1512
1513 /* Arm CQ for TX completions */
1514 mlx4_en_arm_cq(priv, cq);
1515
1516 /* Set initial ownership of all Tx TXBBs to SW (1) */
1517 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
1518 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
1519 ++tx_index;
1520 }
1521
1522 /* Configure port */
1523 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1524 priv->rx_skb_size + ETH_FCS_LEN,
1525 priv->prof->tx_pause,
1526 priv->prof->tx_ppp,
1527 priv->prof->rx_pause,
1528 priv->prof->rx_ppp);
1529 if (err) {
1530 en_err(priv, "Failed setting port general configurations for port %d, with error %d\n",
1531 priv->port, err);
1532 goto tx_err;
1533 }
1534 /* Set default qp number */
1535 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
1536 if (err) {
1537 en_err(priv, "Failed setting default qp numbers\n");
1538 goto tx_err;
1539 }
1540
1541 /* Init port */
1542 en_dbg(HW, priv, "Initializing port\n");
1543 err = mlx4_INIT_PORT(mdev->dev, priv->port);
1544 if (err) {
1545 en_err(priv, "Failed Initializing port\n");
1546 goto tx_err;
1547 }
1548
1549 /* Attach rx QP to bradcast address */
1550 memset(&mc_list[10], 0xff, ETH_ALEN);
1551 mc_list[5] = priv->port; /* needed for B0 steering support */
1552 if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1553 priv->port, 0, MLX4_PROT_ETH,
1554 &priv->broadcast_id))
1555 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
1556
1557 /* Must redo promiscuous mode setup. */
1558 priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
1559
1560 /* Schedule multicast task to populate multicast list */
1561 queue_work(mdev->workqueue, &priv->rx_mode_task);
1562
1563 mlx4_set_stats_bitmap(mdev->dev, &priv->stats_bitmap);
1564
1565 priv->port_up = true;
1566 netif_tx_start_all_queues(dev);
1567 netif_device_attach(dev);
1568
1569 return 0;
1570
1571 tx_err:
1572 while (tx_index--) {
1573 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
1574 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
1575 }
1576 mlx4_en_destroy_drop_qp(priv);
1577 rss_err:
1578 mlx4_en_release_rss_steer(priv);
1579 mac_err:
1580 mlx4_en_put_qp(priv);
1581 cq_err:
1582 while (rx_index--)
1583 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
1584 for (i = 0; i < priv->rx_ring_num; i++)
1585 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1586
1587 return err; /* need to close devices */
1588 }
1589
1590
1591 void mlx4_en_stop_port(struct net_device *dev, int detach)
1592 {
1593 struct mlx4_en_priv *priv = netdev_priv(dev);
1594 struct mlx4_en_dev *mdev = priv->mdev;
1595 struct mlx4_en_mc_list *mclist, *tmp;
1596 struct ethtool_flow_id *flow, *tmp_flow;
1597 int i;
1598 u8 mc_list[16] = {0};
1599
1600 if (!priv->port_up) {
1601 en_dbg(DRV, priv, "stop port called while port already down\n");
1602 return;
1603 }
1604
1605 /* Synchronize with tx routine */
1606 netif_tx_lock_bh(dev);
1607 if (detach)
1608 netif_device_detach(dev);
1609 netif_tx_stop_all_queues(dev);
1610 netif_tx_unlock_bh(dev);
1611
1612 netif_tx_disable(dev);
1613
1614 /* Set port as not active */
1615 priv->port_up = false;
1616
1617 /* Promsicuous mode */
1618 if (mdev->dev->caps.steering_mode ==
1619 MLX4_STEERING_MODE_DEVICE_MANAGED) {
1620 priv->flags &= ~(MLX4_EN_FLAG_PROMISC |
1621 MLX4_EN_FLAG_MC_PROMISC);
1622 mlx4_flow_steer_promisc_remove(mdev->dev,
1623 priv->port,
1624 MLX4_FS_ALL_DEFAULT);
1625 mlx4_flow_steer_promisc_remove(mdev->dev,
1626 priv->port,
1627 MLX4_FS_MC_DEFAULT);
1628 } else if (priv->flags & MLX4_EN_FLAG_PROMISC) {
1629 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
1630
1631 /* Disable promiscouos mode */
1632 mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
1633 priv->port);
1634
1635 /* Disable Multicast promisc */
1636 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
1637 mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
1638 priv->port);
1639 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
1640 }
1641 }
1642
1643 /* Detach All multicasts */
1644 memset(&mc_list[10], 0xff, ETH_ALEN);
1645 mc_list[5] = priv->port; /* needed for B0 steering support */
1646 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1647 MLX4_PROT_ETH, priv->broadcast_id);
1648 list_for_each_entry(mclist, &priv->curr_list, list) {
1649 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
1650 mc_list[5] = priv->port;
1651 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
1652 mc_list, MLX4_PROT_ETH, mclist->reg_id);
1653 }
1654 mlx4_en_clear_list(dev);
1655 list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
1656 list_del(&mclist->list);
1657 kfree(mclist);
1658 }
1659
1660 /* Flush multicast filter */
1661 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
1662
1663 /* Remove flow steering rules for the port*/
1664 if (mdev->dev->caps.steering_mode ==
1665 MLX4_STEERING_MODE_DEVICE_MANAGED) {
1666 ASSERT_RTNL();
1667 list_for_each_entry_safe(flow, tmp_flow,
1668 &priv->ethtool_list, list) {
1669 mlx4_flow_detach(mdev->dev, flow->id);
1670 list_del(&flow->list);
1671 }
1672 }
1673
1674 mlx4_en_destroy_drop_qp(priv);
1675
1676 /* Free TX Rings */
1677 for (i = 0; i < priv->tx_ring_num; i++) {
1678 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
1679 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
1680 }
1681 msleep(10);
1682
1683 for (i = 0; i < priv->tx_ring_num; i++)
1684 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
1685
1686 /* Free RSS qps */
1687 mlx4_en_release_rss_steer(priv);
1688
1689 /* Unregister Mac address for the port */
1690 mlx4_en_put_qp(priv);
1691 if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAGS2_REASSIGN_MAC_EN))
1692 mdev->mac_removed[priv->port] = 1;
1693
1694 /* Free RX Rings */
1695 for (i = 0; i < priv->rx_ring_num; i++) {
1696 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1697 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
1698 msleep(1);
1699 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
1700 }
1701
1702 /* close port*/
1703 mlx4_CLOSE_PORT(mdev->dev, priv->port);
1704 }
1705
1706 static void mlx4_en_restart(struct work_struct *work)
1707 {
1708 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1709 watchdog_task);
1710 struct mlx4_en_dev *mdev = priv->mdev;
1711 struct net_device *dev = priv->dev;
1712
1713 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
1714
1715 mutex_lock(&mdev->state_lock);
1716 if (priv->port_up) {
1717 mlx4_en_stop_port(dev, 1);
1718 if (mlx4_en_start_port(dev))
1719 en_err(priv, "Failed restarting port %d\n", priv->port);
1720 }
1721 mutex_unlock(&mdev->state_lock);
1722 }
1723
1724 static void mlx4_en_clear_stats(struct net_device *dev)
1725 {
1726 struct mlx4_en_priv *priv = netdev_priv(dev);
1727 struct mlx4_en_dev *mdev = priv->mdev;
1728 int i;
1729
1730 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
1731 en_dbg(HW, priv, "Failed dumping statistics\n");
1732
1733 memset(&priv->stats, 0, sizeof(priv->stats));
1734 memset(&priv->pstats, 0, sizeof(priv->pstats));
1735 memset(&priv->pkstats, 0, sizeof(priv->pkstats));
1736 memset(&priv->port_stats, 0, sizeof(priv->port_stats));
1737
1738 for (i = 0; i < priv->tx_ring_num; i++) {
1739 priv->tx_ring[i].bytes = 0;
1740 priv->tx_ring[i].packets = 0;
1741 priv->tx_ring[i].tx_csum = 0;
1742 }
1743 for (i = 0; i < priv->rx_ring_num; i++) {
1744 priv->rx_ring[i].bytes = 0;
1745 priv->rx_ring[i].packets = 0;
1746 priv->rx_ring[i].csum_ok = 0;
1747 priv->rx_ring[i].csum_none = 0;
1748 }
1749 }
1750
1751 static int mlx4_en_open(struct net_device *dev)
1752 {
1753 struct mlx4_en_priv *priv = netdev_priv(dev);
1754 struct mlx4_en_dev *mdev = priv->mdev;
1755 int err = 0;
1756
1757 mutex_lock(&mdev->state_lock);
1758
1759 if (!mdev->device_up) {
1760 en_err(priv, "Cannot open - device down/disabled\n");
1761 err = -EBUSY;
1762 goto out;
1763 }
1764
1765 /* Reset HW statistics and SW counters */
1766 mlx4_en_clear_stats(dev);
1767
1768 err = mlx4_en_start_port(dev);
1769 if (err)
1770 en_err(priv, "Failed starting port:%d\n", priv->port);
1771
1772 out:
1773 mutex_unlock(&mdev->state_lock);
1774 return err;
1775 }
1776
1777
1778 static int mlx4_en_close(struct net_device *dev)
1779 {
1780 struct mlx4_en_priv *priv = netdev_priv(dev);
1781 struct mlx4_en_dev *mdev = priv->mdev;
1782
1783 en_dbg(IFDOWN, priv, "Close port called\n");
1784
1785 mutex_lock(&mdev->state_lock);
1786
1787 mlx4_en_stop_port(dev, 0);
1788 netif_carrier_off(dev);
1789
1790 mutex_unlock(&mdev->state_lock);
1791 return 0;
1792 }
1793
1794 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
1795 {
1796 int i;
1797
1798 #ifdef CONFIG_RFS_ACCEL
1799 free_irq_cpu_rmap(priv->dev->rx_cpu_rmap);
1800 priv->dev->rx_cpu_rmap = NULL;
1801 #endif
1802
1803 for (i = 0; i < priv->tx_ring_num; i++) {
1804 if (priv->tx_ring[i].tx_info)
1805 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
1806 if (priv->tx_cq[i].buf)
1807 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
1808 }
1809
1810 for (i = 0; i < priv->rx_ring_num; i++) {
1811 if (priv->rx_ring[i].rx_info)
1812 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
1813 priv->prof->rx_ring_size, priv->stride);
1814 if (priv->rx_cq[i].buf)
1815 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
1816 }
1817
1818 if (priv->base_tx_qpn) {
1819 mlx4_qp_release_range(priv->mdev->dev, priv->base_tx_qpn, priv->tx_ring_num);
1820 priv->base_tx_qpn = 0;
1821 }
1822 }
1823
1824 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
1825 {
1826 struct mlx4_en_port_profile *prof = priv->prof;
1827 int i;
1828 int err;
1829
1830 err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &priv->base_tx_qpn);
1831 if (err) {
1832 en_err(priv, "failed reserving range for TX rings\n");
1833 return err;
1834 }
1835
1836 /* Create tx Rings */
1837 for (i = 0; i < priv->tx_ring_num; i++) {
1838 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
1839 prof->tx_ring_size, i, TX))
1840 goto err;
1841
1842 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], priv->base_tx_qpn + i,
1843 prof->tx_ring_size, TXBB_SIZE))
1844 goto err;
1845 }
1846
1847 /* Create rx Rings */
1848 for (i = 0; i < priv->rx_ring_num; i++) {
1849 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
1850 prof->rx_ring_size, i, RX))
1851 goto err;
1852
1853 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
1854 prof->rx_ring_size, priv->stride))
1855 goto err;
1856 }
1857
1858 #ifdef CONFIG_RFS_ACCEL
1859 if (priv->mdev->dev->caps.comp_pool) {
1860 priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->mdev->dev->caps.comp_pool);
1861 if (!priv->dev->rx_cpu_rmap)
1862 goto err;
1863 }
1864 #endif
1865
1866 return 0;
1867
1868 err:
1869 en_err(priv, "Failed to allocate NIC resources\n");
1870 return -ENOMEM;
1871 }
1872
1873
1874 void mlx4_en_destroy_netdev(struct net_device *dev)
1875 {
1876 struct mlx4_en_priv *priv = netdev_priv(dev);
1877 struct mlx4_en_dev *mdev = priv->mdev;
1878
1879 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
1880
1881 /* Unregister device - this will close the port if it was up */
1882 if (priv->registered)
1883 unregister_netdev(dev);
1884
1885 if (priv->allocated)
1886 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
1887
1888 cancel_delayed_work(&priv->stats_task);
1889 cancel_delayed_work(&priv->service_task);
1890 /* flush any pending task for this netdev */
1891 flush_workqueue(mdev->workqueue);
1892
1893 /* Detach the netdev so tasks would not attempt to access it */
1894 mutex_lock(&mdev->state_lock);
1895 mdev->pndev[priv->port] = NULL;
1896 mutex_unlock(&mdev->state_lock);
1897
1898 mlx4_en_free_resources(priv);
1899
1900 kfree(priv->tx_ring);
1901 kfree(priv->tx_cq);
1902
1903 free_netdev(dev);
1904 }
1905
1906 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
1907 {
1908 struct mlx4_en_priv *priv = netdev_priv(dev);
1909 struct mlx4_en_dev *mdev = priv->mdev;
1910 int err = 0;
1911
1912 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
1913 dev->mtu, new_mtu);
1914
1915 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
1916 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
1917 return -EPERM;
1918 }
1919 dev->mtu = new_mtu;
1920
1921 if (netif_running(dev)) {
1922 mutex_lock(&mdev->state_lock);
1923 if (!mdev->device_up) {
1924 /* NIC is probably restarting - let watchdog task reset
1925 * the port */
1926 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
1927 } else {
1928 mlx4_en_stop_port(dev, 1);
1929 err = mlx4_en_start_port(dev);
1930 if (err) {
1931 en_err(priv, "Failed restarting port:%d\n",
1932 priv->port);
1933 queue_work(mdev->workqueue, &priv->watchdog_task);
1934 }
1935 }
1936 mutex_unlock(&mdev->state_lock);
1937 }
1938 return 0;
1939 }
1940
1941 static int mlx4_en_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
1942 {
1943 struct mlx4_en_priv *priv = netdev_priv(dev);
1944 struct mlx4_en_dev *mdev = priv->mdev;
1945 struct hwtstamp_config config;
1946
1947 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
1948 return -EFAULT;
1949
1950 /* reserved for future extensions */
1951 if (config.flags)
1952 return -EINVAL;
1953
1954 /* device doesn't support time stamping */
1955 if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS))
1956 return -EINVAL;
1957
1958 /* TX HW timestamp */
1959 switch (config.tx_type) {
1960 case HWTSTAMP_TX_OFF:
1961 case HWTSTAMP_TX_ON:
1962 break;
1963 default:
1964 return -ERANGE;
1965 }
1966
1967 /* RX HW timestamp */
1968 switch (config.rx_filter) {
1969 case HWTSTAMP_FILTER_NONE:
1970 break;
1971 case HWTSTAMP_FILTER_ALL:
1972 case HWTSTAMP_FILTER_SOME:
1973 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1974 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1975 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1976 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1977 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1978 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1979 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1980 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1981 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1982 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1983 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1984 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1985 config.rx_filter = HWTSTAMP_FILTER_ALL;
1986 break;
1987 default:
1988 return -ERANGE;
1989 }
1990
1991 if (mlx4_en_timestamp_config(dev, config.tx_type, config.rx_filter)) {
1992 config.tx_type = HWTSTAMP_TX_OFF;
1993 config.rx_filter = HWTSTAMP_FILTER_NONE;
1994 }
1995
1996 return copy_to_user(ifr->ifr_data, &config,
1997 sizeof(config)) ? -EFAULT : 0;
1998 }
1999
2000 static int mlx4_en_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2001 {
2002 switch (cmd) {
2003 case SIOCSHWTSTAMP:
2004 return mlx4_en_hwtstamp_ioctl(dev, ifr);
2005 default:
2006 return -EOPNOTSUPP;
2007 }
2008 }
2009
2010 static int mlx4_en_set_features(struct net_device *netdev,
2011 netdev_features_t features)
2012 {
2013 struct mlx4_en_priv *priv = netdev_priv(netdev);
2014
2015 if (features & NETIF_F_LOOPBACK)
2016 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
2017 else
2018 priv->ctrl_flags &=
2019 cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
2020
2021 mlx4_en_update_loopback_state(netdev, features);
2022
2023 return 0;
2024
2025 }
2026
2027 static int mlx4_en_set_vf_mac(struct net_device *dev, int queue, u8 *mac)
2028 {
2029 struct mlx4_en_priv *en_priv = netdev_priv(dev);
2030 struct mlx4_en_dev *mdev = en_priv->mdev;
2031 u64 mac_u64 = mlx4_en_mac_to_u64(mac);
2032
2033 if (!is_valid_ether_addr(mac))
2034 return -EINVAL;
2035
2036 return mlx4_set_vf_mac(mdev->dev, en_priv->port, queue, mac_u64);
2037 }
2038
2039 static int mlx4_en_set_vf_vlan(struct net_device *dev, int vf, u16 vlan, u8 qos)
2040 {
2041 struct mlx4_en_priv *en_priv = netdev_priv(dev);
2042 struct mlx4_en_dev *mdev = en_priv->mdev;
2043
2044 return mlx4_set_vf_vlan(mdev->dev, en_priv->port, vf, vlan, qos);
2045 }
2046
2047 static int mlx4_en_set_vf_spoofchk(struct net_device *dev, int vf, bool setting)
2048 {
2049 struct mlx4_en_priv *en_priv = netdev_priv(dev);
2050 struct mlx4_en_dev *mdev = en_priv->mdev;
2051
2052 return mlx4_set_vf_spoofchk(mdev->dev, en_priv->port, vf, setting);
2053 }
2054
2055 static int mlx4_en_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivf)
2056 {
2057 struct mlx4_en_priv *en_priv = netdev_priv(dev);
2058 struct mlx4_en_dev *mdev = en_priv->mdev;
2059
2060 return mlx4_get_vf_config(mdev->dev, en_priv->port, vf, ivf);
2061 }
2062
2063 static const struct net_device_ops mlx4_netdev_ops = {
2064 .ndo_open = mlx4_en_open,
2065 .ndo_stop = mlx4_en_close,
2066 .ndo_start_xmit = mlx4_en_xmit,
2067 .ndo_select_queue = mlx4_en_select_queue,
2068 .ndo_get_stats = mlx4_en_get_stats,
2069 .ndo_set_rx_mode = mlx4_en_set_rx_mode,
2070 .ndo_set_mac_address = mlx4_en_set_mac,
2071 .ndo_validate_addr = eth_validate_addr,
2072 .ndo_change_mtu = mlx4_en_change_mtu,
2073 .ndo_do_ioctl = mlx4_en_ioctl,
2074 .ndo_tx_timeout = mlx4_en_tx_timeout,
2075 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
2076 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
2077 #ifdef CONFIG_NET_POLL_CONTROLLER
2078 .ndo_poll_controller = mlx4_en_netpoll,
2079 #endif
2080 .ndo_set_features = mlx4_en_set_features,
2081 .ndo_setup_tc = mlx4_en_setup_tc,
2082 #ifdef CONFIG_RFS_ACCEL
2083 .ndo_rx_flow_steer = mlx4_en_filter_rfs,
2084 #endif
2085 };
2086
2087 static const struct net_device_ops mlx4_netdev_ops_master = {
2088 .ndo_open = mlx4_en_open,
2089 .ndo_stop = mlx4_en_close,
2090 .ndo_start_xmit = mlx4_en_xmit,
2091 .ndo_select_queue = mlx4_en_select_queue,
2092 .ndo_get_stats = mlx4_en_get_stats,
2093 .ndo_set_rx_mode = mlx4_en_set_rx_mode,
2094 .ndo_set_mac_address = mlx4_en_set_mac,
2095 .ndo_validate_addr = eth_validate_addr,
2096 .ndo_change_mtu = mlx4_en_change_mtu,
2097 .ndo_tx_timeout = mlx4_en_tx_timeout,
2098 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
2099 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
2100 .ndo_set_vf_mac = mlx4_en_set_vf_mac,
2101 .ndo_set_vf_vlan = mlx4_en_set_vf_vlan,
2102 .ndo_set_vf_spoofchk = mlx4_en_set_vf_spoofchk,
2103 .ndo_get_vf_config = mlx4_en_get_vf_config,
2104 #ifdef CONFIG_NET_POLL_CONTROLLER
2105 .ndo_poll_controller = mlx4_en_netpoll,
2106 #endif
2107 .ndo_set_features = mlx4_en_set_features,
2108 .ndo_setup_tc = mlx4_en_setup_tc,
2109 #ifdef CONFIG_RFS_ACCEL
2110 .ndo_rx_flow_steer = mlx4_en_filter_rfs,
2111 #endif
2112 };
2113
2114 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
2115 struct mlx4_en_port_profile *prof)
2116 {
2117 struct net_device *dev;
2118 struct mlx4_en_priv *priv;
2119 int i;
2120 int err;
2121
2122 dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
2123 MAX_TX_RINGS, MAX_RX_RINGS);
2124 if (dev == NULL)
2125 return -ENOMEM;
2126
2127 netif_set_real_num_tx_queues(dev, prof->tx_ring_num);
2128 netif_set_real_num_rx_queues(dev, prof->rx_ring_num);
2129
2130 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
2131 dev->dev_id = port - 1;
2132
2133 /*
2134 * Initialize driver private data
2135 */
2136
2137 priv = netdev_priv(dev);
2138 memset(priv, 0, sizeof(struct mlx4_en_priv));
2139 priv->dev = dev;
2140 priv->mdev = mdev;
2141 priv->ddev = &mdev->pdev->dev;
2142 priv->prof = prof;
2143 priv->port = port;
2144 priv->port_up = false;
2145 priv->flags = prof->flags;
2146 priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
2147 MLX4_WQE_CTRL_SOLICITED);
2148 priv->num_tx_rings_p_up = mdev->profile.num_tx_rings_p_up;
2149 priv->tx_ring_num = prof->tx_ring_num;
2150
2151 priv->tx_ring = kzalloc(sizeof(struct mlx4_en_tx_ring) * MAX_TX_RINGS,
2152 GFP_KERNEL);
2153 if (!priv->tx_ring) {
2154 err = -ENOMEM;
2155 goto out;
2156 }
2157 priv->tx_cq = kzalloc(sizeof(struct mlx4_en_cq) * MAX_TX_RINGS,
2158 GFP_KERNEL);
2159 if (!priv->tx_cq) {
2160 err = -ENOMEM;
2161 goto out;
2162 }
2163 priv->rx_ring_num = prof->rx_ring_num;
2164 priv->cqe_factor = (mdev->dev->caps.cqe_size == 64) ? 1 : 0;
2165 priv->mac_index = -1;
2166 priv->msg_enable = MLX4_EN_MSG_LEVEL;
2167 spin_lock_init(&priv->stats_lock);
2168 INIT_WORK(&priv->rx_mode_task, mlx4_en_do_set_rx_mode);
2169 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
2170 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
2171 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
2172 INIT_DELAYED_WORK(&priv->service_task, mlx4_en_service_task);
2173 #ifdef CONFIG_MLX4_EN_DCB
2174 if (!mlx4_is_slave(priv->mdev->dev)) {
2175 if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_SET_ETH_SCHED) {
2176 dev->dcbnl_ops = &mlx4_en_dcbnl_ops;
2177 } else {
2178 en_info(priv, "enabling only PFC DCB ops\n");
2179 dev->dcbnl_ops = &mlx4_en_dcbnl_pfc_ops;
2180 }
2181 }
2182 #endif
2183
2184 for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i)
2185 INIT_HLIST_HEAD(&priv->mac_hash[i]);
2186
2187 /* Query for default mac and max mtu */
2188 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
2189
2190 /* Set default MAC */
2191 dev->addr_len = ETH_ALEN;
2192 mlx4_en_u64_to_mac(dev->dev_addr, mdev->dev->caps.def_mac[priv->port]);
2193 if (!is_valid_ether_addr(dev->dev_addr)) {
2194 en_err(priv, "Port: %d, invalid mac burned: %pM, quiting\n",
2195 priv->port, dev->dev_addr);
2196 err = -EINVAL;
2197 goto out;
2198 }
2199
2200 memcpy(priv->prev_mac, dev->dev_addr, sizeof(priv->prev_mac));
2201
2202 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
2203 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
2204 err = mlx4_en_alloc_resources(priv);
2205 if (err)
2206 goto out;
2207
2208 #ifdef CONFIG_RFS_ACCEL
2209 INIT_LIST_HEAD(&priv->filters);
2210 spin_lock_init(&priv->filters_lock);
2211 #endif
2212
2213 /* Initialize time stamping config */
2214 priv->hwtstamp_config.flags = 0;
2215 priv->hwtstamp_config.tx_type = HWTSTAMP_TX_OFF;
2216 priv->hwtstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
2217
2218 /* Allocate page for receive rings */
2219 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
2220 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
2221 if (err) {
2222 en_err(priv, "Failed to allocate page for rx qps\n");
2223 goto out;
2224 }
2225 priv->allocated = 1;
2226
2227 /*
2228 * Initialize netdev entry points
2229 */
2230 if (mlx4_is_master(priv->mdev->dev))
2231 dev->netdev_ops = &mlx4_netdev_ops_master;
2232 else
2233 dev->netdev_ops = &mlx4_netdev_ops;
2234 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
2235 netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
2236 netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
2237
2238 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
2239
2240 /*
2241 * Set driver features
2242 */
2243 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2244 if (mdev->LSO_support)
2245 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
2246
2247 dev->vlan_features = dev->hw_features;
2248
2249 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
2250 dev->features = dev->hw_features | NETIF_F_HIGHDMA |
2251 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2252 NETIF_F_HW_VLAN_CTAG_FILTER;
2253 dev->hw_features |= NETIF_F_LOOPBACK;
2254
2255 if (mdev->dev->caps.steering_mode ==
2256 MLX4_STEERING_MODE_DEVICE_MANAGED)
2257 dev->hw_features |= NETIF_F_NTUPLE;
2258
2259 if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0)
2260 dev->priv_flags |= IFF_UNICAST_FLT;
2261
2262 mdev->pndev[port] = dev;
2263
2264 netif_carrier_off(dev);
2265 err = register_netdev(dev);
2266 if (err) {
2267 en_err(priv, "Netdev registration failed for port %d\n", port);
2268 goto out;
2269 }
2270 priv->registered = 1;
2271
2272 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
2273 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
2274
2275 mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
2276
2277 /* Configure port */
2278 mlx4_en_calc_rx_buf(dev);
2279 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
2280 priv->rx_skb_size + ETH_FCS_LEN,
2281 prof->tx_pause, prof->tx_ppp,
2282 prof->rx_pause, prof->rx_ppp);
2283 if (err) {
2284 en_err(priv, "Failed setting port general configurations "
2285 "for port %d, with error %d\n", priv->port, err);
2286 goto out;
2287 }
2288
2289 /* Init port */
2290 en_warn(priv, "Initializing port\n");
2291 err = mlx4_INIT_PORT(mdev->dev, priv->port);
2292 if (err) {
2293 en_err(priv, "Failed Initializing port\n");
2294 goto out;
2295 }
2296 mlx4_en_set_default_moderation(priv);
2297 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
2298
2299 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
2300 queue_delayed_work(mdev->workqueue, &priv->service_task,
2301 SERVICE_TASK_DELAY);
2302
2303 return 0;
2304
2305 out:
2306 mlx4_en_destroy_netdev(dev);
2307 return err;
2308 }
2309
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