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mlx4_en: Using real number of rings as RSS map size
[deliverable/linux.git] / drivers / net / mlx4 / en_netdev.c
CommitLineData
c27a02cd
YP		 1/*
2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34#include <linux/etherdevice.h>
35#include <linux/tcp.h>
36#include <linux/if_vlan.h>
37#include <linux/delay.h>
38
39#include <linux/mlx4/driver.h>
40#include <linux/mlx4/device.h>
41#include <linux/mlx4/cmd.h>
42#include <linux/mlx4/cq.h>
43
44#include "mlx4_en.h"
45#include "en_port.h"
46
47
48static void mlx4_en_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
49{
50 struct mlx4_en_priv *priv = netdev_priv(dev);
51 struct mlx4_en_dev *mdev = priv->mdev;
52 int err;
53
453a6082 54 en_dbg(HW, priv, "Registering VLAN group:%p\n", grp);
c27a02cd
YP		 55 priv->vlgrp = grp;
56
57 mutex_lock(&mdev->state_lock);
58 if (mdev->device_up && priv->port_up) {
59 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, grp);
60 if (err)
453a6082 61 en_err(priv, "Failed configuring VLAN filter\n");
c27a02cd
YP		 62 }
63 mutex_unlock(&mdev->state_lock);
64}
65
66static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
67{
68 struct mlx4_en_priv *priv = netdev_priv(dev);
69 struct mlx4_en_dev *mdev = priv->mdev;
70 int err;
71
72 if (!priv->vlgrp)
73 return;
74
453a6082
YP		 75 en_dbg(HW, priv, "adding VLAN:%d (vlgrp entry:%p)\n",
76 vid, vlan_group_get_device(priv->vlgrp, vid));
c27a02cd
YP		 77
78 /* Add VID to port VLAN filter */
79 mutex_lock(&mdev->state_lock);
80 if (mdev->device_up && priv->port_up) {
81 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
82 if (err)
453a6082 83 en_err(priv, "Failed configuring VLAN filter\n");
c27a02cd
YP		 84 }
85 mutex_unlock(&mdev->state_lock);
86}
87
88static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
89{
90 struct mlx4_en_priv *priv = netdev_priv(dev);
91 struct mlx4_en_dev *mdev = priv->mdev;
92 int err;
93
94 if (!priv->vlgrp)
95 return;
96
453a6082
YP		 97 en_dbg(HW, priv, "Killing VID:%d (vlgrp:%p vlgrp entry:%p)\n",
98 vid, priv->vlgrp, vlan_group_get_device(priv->vlgrp, vid));
c27a02cd
YP		 99 vlan_group_set_device(priv->vlgrp, vid, NULL);
100
101 /* Remove VID from port VLAN filter */
102 mutex_lock(&mdev->state_lock);
103 if (mdev->device_up && priv->port_up) {
104 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
105 if (err)
453a6082 106 en_err(priv, "Failed configuring VLAN filter\n");
c27a02cd
YP		 107 }
108 mutex_unlock(&mdev->state_lock);
109}
110
111static u64 mlx4_en_mac_to_u64(u8 *addr)
112{
113 u64 mac = 0;
114 int i;
115
116 for (i = 0; i < ETH_ALEN; i++) {
117 mac <<= 8;
118 mac |= addr[i];
119 }
120 return mac;
121}
122
123static int mlx4_en_set_mac(struct net_device *dev, void *addr)
124{
125 struct mlx4_en_priv *priv = netdev_priv(dev);
126 struct mlx4_en_dev *mdev = priv->mdev;
127 struct sockaddr *saddr = addr;
128
129 if (!is_valid_ether_addr(saddr->sa_data))
130 return -EADDRNOTAVAIL;
131
132 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
133 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
134 queue_work(mdev->workqueue, &priv->mac_task);
135 return 0;
136}
137
138static void mlx4_en_do_set_mac(struct work_struct *work)
139{
140 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
141 mac_task);
142 struct mlx4_en_dev *mdev = priv->mdev;
143 int err = 0;
144
145 mutex_lock(&mdev->state_lock);
146 if (priv->port_up) {
147 /* Remove old MAC and insert the new one */
148 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
149 err = mlx4_register_mac(mdev->dev, priv->port,
150 priv->mac, &priv->mac_index);
151 if (err)
453a6082 152 en_err(priv, "Failed changing HW MAC address\n");
c27a02cd 153 } else
453a6082
YP		 154 en_dbg(HW, priv, "Port is down while "
155 "registering mac, exiting...\n");
c27a02cd
YP		 156
157 mutex_unlock(&mdev->state_lock);
158}
159
160static void mlx4_en_clear_list(struct net_device *dev)
161{
162 struct mlx4_en_priv *priv = netdev_priv(dev);
163 struct dev_mc_list *plist = priv->mc_list;
164 struct dev_mc_list *next;
165
166 while (plist) {
167 next = plist->next;
168 kfree(plist);
169 plist = next;
170 }
171 priv->mc_list = NULL;
172}
173
174static void mlx4_en_cache_mclist(struct net_device *dev)
175{
176 struct mlx4_en_priv *priv = netdev_priv(dev);
c27a02cd
YP		 177 struct dev_mc_list *mclist;
178 struct dev_mc_list *tmp;
179 struct dev_mc_list *plist = NULL;
180
181 for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
182 tmp = kmalloc(sizeof(struct dev_mc_list), GFP_ATOMIC);
183 if (!tmp) {
453a6082 184 en_err(priv, "failed to allocate multicast list\n");
c27a02cd
YP		 185 mlx4_en_clear_list(dev);
186 return;
187 }
188 memcpy(tmp, mclist, sizeof(struct dev_mc_list));
189 tmp->next = NULL;
190 if (plist)
191 plist->next = tmp;
192 else
193 priv->mc_list = tmp;
194 plist = tmp;
195 }
196}
197
198
199static void mlx4_en_set_multicast(struct net_device *dev)
200{
201 struct mlx4_en_priv *priv = netdev_priv(dev);
202
203 if (!priv->port_up)
204 return;
205
206 queue_work(priv->mdev->workqueue, &priv->mcast_task);
207}
208
209static void mlx4_en_do_set_multicast(struct work_struct *work)
210{
211 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
212 mcast_task);
213 struct mlx4_en_dev *mdev = priv->mdev;
214 struct net_device *dev = priv->dev;
215 struct dev_mc_list *mclist;
216 u64 mcast_addr = 0;
217 int err;
218
219 mutex_lock(&mdev->state_lock);
220 if (!mdev->device_up) {
453a6082
YP		 221 en_dbg(HW, priv, "Card is not up, "
222 "ignoring multicast change.\n");
c27a02cd
YP		 223 goto out;
224 }
225 if (!priv->port_up) {
453a6082
YP		 226 en_dbg(HW, priv, "Port is down, "
227 "ignoring multicast change.\n");
c27a02cd
YP		 228 goto out;
229 }
230
231 /*
232 * Promsicuous mode: disable all filters
233 */
234
235 if (dev->flags & IFF_PROMISC) {
236 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
237 if (netif_msg_rx_status(priv))
453a6082 238 en_warn(priv, "Entering promiscuous mode\n");
c27a02cd
YP		 239 priv->flags |= MLX4_EN_FLAG_PROMISC;
240
241 /* Enable promiscouos mode */
242 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
243 priv->base_qpn, 1);
244 if (err)
453a6082
YP		 245 en_err(priv, "Failed enabling "
246 "promiscous mode\n");
c27a02cd
YP		 247
248 /* Disable port multicast filter (unconditionally) */
249 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
250 0, MLX4_MCAST_DISABLE);
251 if (err)
453a6082
YP		 252 en_err(priv, "Failed disabling "
253 "multicast filter\n");
c27a02cd
YP		 254
255 /* Disable port VLAN filter */
256 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
257 if (err)
453a6082 258 en_err(priv, "Failed disabling VLAN filter\n");
c27a02cd
YP		 259 }
260 goto out;
261 }
262
263 /*
264 * Not in promiscous mode
265 */
266
267 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
268 if (netif_msg_rx_status(priv))
453a6082 269 en_warn(priv, "Leaving promiscuous mode\n");
c27a02cd
YP		 270 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
271
272 /* Disable promiscouos mode */
273 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
274 priv->base_qpn, 0);
275 if (err)
453a6082 276 en_err(priv, "Failed disabling promiscous mode\n");
c27a02cd
YP		 277
278 /* Enable port VLAN filter */
279 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
280 if (err)
453a6082 281 en_err(priv, "Failed enabling VLAN filter\n");
c27a02cd
YP		 282 }
283
284 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
285 if (dev->flags & IFF_ALLMULTI) {
286 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
287 0, MLX4_MCAST_DISABLE);
288 if (err)
453a6082 289 en_err(priv, "Failed disabling multicast filter\n");
c27a02cd
YP		 290 } else {
291 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
292 0, MLX4_MCAST_DISABLE);
293 if (err)
453a6082 294 en_err(priv, "Failed disabling multicast filter\n");
c27a02cd
YP		 295
296 /* Flush mcast filter and init it with broadcast address */
297 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
298 1, MLX4_MCAST_CONFIG);
299
300 /* Update multicast list - we cache all addresses so they won't
301 * change while HW is updated holding the command semaphor */
302 netif_tx_lock_bh(dev);
303 mlx4_en_cache_mclist(dev);
304 netif_tx_unlock_bh(dev);
305 for (mclist = priv->mc_list; mclist; mclist = mclist->next) {
306 mcast_addr = mlx4_en_mac_to_u64(mclist->dmi_addr);
307 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
308 mcast_addr, 0, MLX4_MCAST_CONFIG);
309 }
310 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
311 0, MLX4_MCAST_ENABLE);
312 if (err)
453a6082 313 en_err(priv, "Failed enabling multicast filter\n");
c27a02cd
YP		 314
315 mlx4_en_clear_list(dev);
316 }
317out:
318 mutex_unlock(&mdev->state_lock);
319}
320
321#ifdef CONFIG_NET_POLL_CONTROLLER
322static void mlx4_en_netpoll(struct net_device *dev)
323{
324 struct mlx4_en_priv *priv = netdev_priv(dev);
325 struct mlx4_en_cq *cq;
326 unsigned long flags;
327 int i;
328
329 for (i = 0; i < priv->rx_ring_num; i++) {
330 cq = &priv->rx_cq[i];
331 spin_lock_irqsave(&cq->lock, flags);
332 napi_synchronize(&cq->napi);
333 mlx4_en_process_rx_cq(dev, cq, 0);
334 spin_unlock_irqrestore(&cq->lock, flags);
335 }
336}
337#endif
338
339static void mlx4_en_tx_timeout(struct net_device *dev)
340{
341 struct mlx4_en_priv *priv = netdev_priv(dev);
342 struct mlx4_en_dev *mdev = priv->mdev;
343
344 if (netif_msg_timer(priv))
453a6082 345 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
c27a02cd 346
1e338db5 347 priv->port_stats.tx_timeout++;
453a6082 348 en_dbg(DRV, priv, "Scheduling watchdog\n");
1e338db5 349 queue_work(mdev->workqueue, &priv->watchdog_task);
c27a02cd
YP		 350}
351
352
353static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
354{
355 struct mlx4_en_priv *priv = netdev_priv(dev);
356
357 spin_lock_bh(&priv->stats_lock);
358 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
359 spin_unlock_bh(&priv->stats_lock);
360
361 return &priv->ret_stats;
362}
363
364static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
365{
c27a02cd
YP		 366 struct mlx4_en_cq *cq;
367 int i;
368
369 /* If we haven't received a specific coalescing setting
98a1708d 370 * (module param), we set the moderation parameters as follows:
c27a02cd
YP		 371 * - moder_cnt is set to the number of mtu sized packets to
372 * satisfy our coelsing target.
373 * - moder_time is set to a fixed value.
374 */
3db36fb2 375 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
60b9f9e5 376 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
453a6082
YP		 377 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
378 "rx_frames:%d rx_usecs:%d\n",
c27a02cd
YP		 379 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
380
381 /* Setup cq moderation params */
382 for (i = 0; i < priv->rx_ring_num; i++) {
383 cq = &priv->rx_cq[i];
384 cq->moder_cnt = priv->rx_frames;
385 cq->moder_time = priv->rx_usecs;
386 }
387
388 for (i = 0; i < priv->tx_ring_num; i++) {
389 cq = &priv->tx_cq[i];
390 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
391 cq->moder_time = MLX4_EN_TX_COAL_TIME;
392 }
393
394 /* Reset auto-moderation params */
395 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
396 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
397 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
398 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
399 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
60b9f9e5 400 priv->adaptive_rx_coal = 1;
c27a02cd
YP		 401 priv->last_moder_time = MLX4_EN_AUTO_CONF;
402 priv->last_moder_jiffies = 0;
403 priv->last_moder_packets = 0;
404 priv->last_moder_tx_packets = 0;
405 priv->last_moder_bytes = 0;
406}
407
408static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
409{
410 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
c27a02cd
YP		 411 struct mlx4_en_cq *cq;
412 unsigned long packets;
413 unsigned long rate;
414 unsigned long avg_pkt_size;
415 unsigned long rx_packets;
416 unsigned long rx_bytes;
a35ee541 417 unsigned long rx_byte_diff;
c27a02cd
YP		 418 unsigned long tx_packets;
419 unsigned long tx_pkt_diff;
420 unsigned long rx_pkt_diff;
421 int moder_time;
422 int i, err;
423
424 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
425 return;
426
427 spin_lock_bh(&priv->stats_lock);
428 rx_packets = priv->stats.rx_packets;
429 rx_bytes = priv->stats.rx_bytes;
430 tx_packets = priv->stats.tx_packets;
431 spin_unlock_bh(&priv->stats_lock);
432
433 if (!priv->last_moder_jiffies || !period)
434 goto out;
435
436 tx_pkt_diff = ((unsigned long) (tx_packets -
437 priv->last_moder_tx_packets));
438 rx_pkt_diff = ((unsigned long) (rx_packets -
439 priv->last_moder_packets));
440 packets = max(tx_pkt_diff, rx_pkt_diff);
a35ee541
YP		 441 rx_byte_diff = rx_bytes - priv->last_moder_bytes;
442 rx_byte_diff = rx_byte_diff ? rx_byte_diff : 1;
c27a02cd
YP		 443 rate = packets * HZ / period;
444 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
445 priv->last_moder_bytes)) / packets : 0;
446
447 /* Apply auto-moderation only when packet rate exceeds a rate that
448 * it matters */
449 if (rate > MLX4_EN_RX_RATE_THRESH) {
450 /* If tx and rx packet rates are not balanced, assume that
451 * traffic is mainly BW bound and apply maximum moderation.
452 * Otherwise, moderate according to packet rate */
a35ee541
YP		 453 if (2 * tx_pkt_diff > 3 * rx_pkt_diff &&
454 rx_pkt_diff / rx_byte_diff <
455 MLX4_EN_SMALL_PKT_SIZE)
456 moder_time = priv->rx_usecs_low;
457 else if (2 * rx_pkt_diff > 3 * tx_pkt_diff)
c27a02cd 458 moder_time = priv->rx_usecs_high;
a35ee541 459 else {
c27a02cd
YP		 460 if (rate < priv->pkt_rate_low)
461 moder_time = priv->rx_usecs_low;
462 else if (rate > priv->pkt_rate_high)
463 moder_time = priv->rx_usecs_high;
464 else
465 moder_time = (rate - priv->pkt_rate_low) *
466 (priv->rx_usecs_high - priv->rx_usecs_low) /
467 (priv->pkt_rate_high - priv->pkt_rate_low) +
468 priv->rx_usecs_low;
469 }
470 } else {
471 /* When packet rate is low, use default moderation rather than
472 * 0 to prevent interrupt storms if traffic suddenly increases */
473 moder_time = priv->rx_usecs;
474 }
475
453a6082
YP		 476 en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
477 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
c27a02cd 478
453a6082
YP		 479 en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
480 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
c27a02cd
YP		 481 priv->last_moder_time, moder_time, period, packets,
482 avg_pkt_size, rate);
483
484 if (moder_time != priv->last_moder_time) {
485 priv->last_moder_time = moder_time;
486 for (i = 0; i < priv->rx_ring_num; i++) {
487 cq = &priv->rx_cq[i];
488 cq->moder_time = moder_time;
489 err = mlx4_en_set_cq_moder(priv, cq);
490 if (err) {
453a6082 491 en_err(priv, "Failed modifying moderation for cq:%d\n", i);
c27a02cd
YP		 492 break;
493 }
494 }
495 }
496
497out:
498 priv->last_moder_packets = rx_packets;
499 priv->last_moder_tx_packets = tx_packets;
500 priv->last_moder_bytes = rx_bytes;
501 priv->last_moder_jiffies = jiffies;
502}
503
504static void mlx4_en_do_get_stats(struct work_struct *work)
505{
bf6aede7 506 struct delayed_work *delay = to_delayed_work(work);
c27a02cd
YP		 507 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
508 stats_task);
509 struct mlx4_en_dev *mdev = priv->mdev;
510 int err;
511
512 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
513 if (err)
453a6082 514 en_dbg(HW, priv, "Could not update stats \n");
c27a02cd
YP		 515
516 mutex_lock(&mdev->state_lock);
517 if (mdev->device_up) {
518 if (priv->port_up)
519 mlx4_en_auto_moderation(priv);
520
521 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
522 }
523 mutex_unlock(&mdev->state_lock);
524}
525
526static void mlx4_en_linkstate(struct work_struct *work)
527{
528 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
529 linkstate_task);
530 struct mlx4_en_dev *mdev = priv->mdev;
531 int linkstate = priv->link_state;
532
533 mutex_lock(&mdev->state_lock);
534 /* If observable port state changed set carrier state and
535 * report to system log */
536 if (priv->last_link_state != linkstate) {
537 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
453a6082 538 en_dbg(LINK, priv, "Link Down\n");
c27a02cd
YP		 539 netif_carrier_off(priv->dev);
540 } else {
453a6082 541 en_dbg(LINK, priv, "Link Up\n");
c27a02cd
YP		 542 netif_carrier_on(priv->dev);
543 }
544 }
545 priv->last_link_state = linkstate;
546 mutex_unlock(&mdev->state_lock);
547}
548
549
18cc42a3 550int mlx4_en_start_port(struct net_device *dev)
c27a02cd
YP		 551{
552 struct mlx4_en_priv *priv = netdev_priv(dev);
553 struct mlx4_en_dev *mdev = priv->mdev;
554 struct mlx4_en_cq *cq;
555 struct mlx4_en_tx_ring *tx_ring;
c27a02cd
YP		 556 int rx_index = 0;
557 int tx_index = 0;
c27a02cd
YP		 558 int err = 0;
559 int i;
560 int j;
561
562 if (priv->port_up) {
453a6082 563 en_dbg(DRV, priv, "start port called while port already up\n");
c27a02cd
YP		 564 return 0;
565 }
566
567 /* Calculate Rx buf size */
568 dev->mtu = min(dev->mtu, priv->max_mtu);
569 mlx4_en_calc_rx_buf(dev);
453a6082 570 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
38aab07c 571
c27a02cd 572 /* Configure rx cq's and rings */
38aab07c
YP		 573 err = mlx4_en_activate_rx_rings(priv);
574 if (err) {
453a6082 575 en_err(priv, "Failed to activate RX rings\n");
38aab07c
YP		 576 return err;
577 }
c27a02cd
YP		 578 for (i = 0; i < priv->rx_ring_num; i++) {
579 cq = &priv->rx_cq[i];
c27a02cd
YP		 580
581 err = mlx4_en_activate_cq(priv, cq);
582 if (err) {
453a6082 583 en_err(priv, "Failed activating Rx CQ\n");
a4233304 584 goto cq_err;
c27a02cd
YP		 585 }
586 for (j = 0; j < cq->size; j++)
587 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
588 err = mlx4_en_set_cq_moder(priv, cq);
589 if (err) {
453a6082 590 en_err(priv, "Failed setting cq moderation parameters");
c27a02cd
YP		 591 mlx4_en_deactivate_cq(priv, cq);
592 goto cq_err;
593 }
594 mlx4_en_arm_cq(priv, cq);
38aab07c 595 priv->rx_ring[i].cqn = cq->mcq.cqn;
c27a02cd
YP		 596 ++rx_index;
597 }
598
c27a02cd
YP		 599 err = mlx4_en_config_rss_steer(priv);
600 if (err) {
453a6082 601 en_err(priv, "Failed configuring rss steering\n");
38aab07c 602 goto cq_err;
c27a02cd
YP		 603 }
604
605 /* Configure tx cq's and rings */
606 for (i = 0; i < priv->tx_ring_num; i++) {
607 /* Configure cq */
608 cq = &priv->tx_cq[i];
609 err = mlx4_en_activate_cq(priv, cq);
610 if (err) {
453a6082 611 en_err(priv, "Failed allocating Tx CQ\n");
c27a02cd
YP		 612 goto tx_err;
613 }
614 err = mlx4_en_set_cq_moder(priv, cq);
615 if (err) {
453a6082 616 en_err(priv, "Failed setting cq moderation parameters");
c27a02cd
YP		 617 mlx4_en_deactivate_cq(priv, cq);
618 goto tx_err;
619 }
453a6082 620 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
c27a02cd
YP		 621 cq->buf->wqe_index = cpu_to_be16(0xffff);
622
623 /* Configure ring */
624 tx_ring = &priv->tx_ring[i];
625 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
626 priv->rx_ring[0].srq.srqn);
627 if (err) {
453a6082 628 en_err(priv, "Failed allocating Tx ring\n");
c27a02cd
YP		 629 mlx4_en_deactivate_cq(priv, cq);
630 goto tx_err;
631 }
632 /* Set initial ownership of all Tx TXBBs to SW (1) */
633 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
634 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
635 ++tx_index;
636 }
637
638 /* Configure port */
639 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
640 priv->rx_skb_size + ETH_FCS_LEN,
d53b93f2
YP		 641 priv->prof->tx_pause,
642 priv->prof->tx_ppp,
643 priv->prof->rx_pause,
644 priv->prof->rx_ppp);
c27a02cd 645 if (err) {
453a6082
YP		 646 en_err(priv, "Failed setting port general configurations "
647 "for port %d, with error %d\n", priv->port, err);
c27a02cd
YP		 648 goto tx_err;
649 }
650 /* Set default qp number */
651 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
652 if (err) {
453a6082 653 en_err(priv, "Failed setting default qp numbers\n");
c27a02cd
YP		 654 goto tx_err;
655 }
656 /* Set port mac number */
453a6082 657 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
c27a02cd
YP		 658 err = mlx4_register_mac(mdev->dev, priv->port,
659 priv->mac, &priv->mac_index);
660 if (err) {
453a6082 661 en_err(priv, "Failed setting port mac\n");
c27a02cd
YP		 662 goto tx_err;
663 }
664
665 /* Init port */
453a6082 666 en_dbg(HW, priv, "Initializing port\n");
c27a02cd
YP		 667 err = mlx4_INIT_PORT(mdev->dev, priv->port);
668 if (err) {
453a6082 669 en_err(priv, "Failed Initializing port\n");
c27a02cd
YP		 670 goto mac_err;
671 }
672
673 /* Schedule multicast task to populate multicast list */
674 queue_work(mdev->workqueue, &priv->mcast_task);
675
676 priv->port_up = true;
a11faac7 677 netif_tx_start_all_queues(dev);
c27a02cd
YP		 678 return 0;
679
680mac_err:
681 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
682tx_err:
683 while (tx_index--) {
684 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
685 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
686 }
687
688 mlx4_en_release_rss_steer(priv);
c27a02cd
YP		 689cq_err:
690 while (rx_index--)
691 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
38aab07c
YP		 692 for (i = 0; i < priv->rx_ring_num; i++)
693 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
c27a02cd
YP		 694
695 return err; /* need to close devices */
696}
697
698
18cc42a3 699void mlx4_en_stop_port(struct net_device *dev)
c27a02cd
YP		 700{
701 struct mlx4_en_priv *priv = netdev_priv(dev);
702 struct mlx4_en_dev *mdev = priv->mdev;
703 int i;
704
705 if (!priv->port_up) {
453a6082 706 en_dbg(DRV, priv, "stop port called while port already down\n");
c27a02cd
YP		 707 return;
708 }
c27a02cd
YP		 709
710 /* Synchronize with tx routine */
711 netif_tx_lock_bh(dev);
3c05f5ef 712 netif_tx_stop_all_queues(dev);
c27a02cd
YP		 713 netif_tx_unlock_bh(dev);
714
715 /* close port*/
3c05f5ef 716 priv->port_up = false;
c27a02cd
YP		 717 mlx4_CLOSE_PORT(mdev->dev, priv->port);
718
719 /* Unregister Mac address for the port */
720 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
721
722 /* Free TX Rings */
723 for (i = 0; i < priv->tx_ring_num; i++) {
724 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
725 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
726 }
727 msleep(10);
728
729 for (i = 0; i < priv->tx_ring_num; i++)
730 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
731
732 /* Free RSS qps */
733 mlx4_en_release_rss_steer(priv);
734
735 /* Free RX Rings */
736 for (i = 0; i < priv->rx_ring_num; i++) {
737 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
738 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
739 msleep(1);
740 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
741 }
742}
743
744static void mlx4_en_restart(struct work_struct *work)
745{
746 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
747 watchdog_task);
748 struct mlx4_en_dev *mdev = priv->mdev;
749 struct net_device *dev = priv->dev;
750
453a6082 751 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
1e338db5
YP		 752
753 mutex_lock(&mdev->state_lock);
754 if (priv->port_up) {
755 mlx4_en_stop_port(dev);
756 if (mlx4_en_start_port(dev))
453a6082 757 en_err(priv, "Failed restarting port %d\n", priv->port);
1e338db5
YP		 758 }
759 mutex_unlock(&mdev->state_lock);
c27a02cd
YP		 760}
761
762
763static int mlx4_en_open(struct net_device *dev)
764{
765 struct mlx4_en_priv *priv = netdev_priv(dev);
766 struct mlx4_en_dev *mdev = priv->mdev;
767 int i;
768 int err = 0;
769
770 mutex_lock(&mdev->state_lock);
771
772 if (!mdev->device_up) {
453a6082 773 en_err(priv, "Cannot open - device down/disabled\n");
c27a02cd
YP		 774 err = -EBUSY;
775 goto out;
776 }
777
778 /* Reset HW statistics and performance counters */
779 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
453a6082 780 en_dbg(HW, priv, "Failed dumping statistics\n");
c27a02cd
YP		 781
782 memset(&priv->stats, 0, sizeof(priv->stats));
783 memset(&priv->pstats, 0, sizeof(priv->pstats));
784
785 for (i = 0; i < priv->tx_ring_num; i++) {
786 priv->tx_ring[i].bytes = 0;
787 priv->tx_ring[i].packets = 0;
788 }
789 for (i = 0; i < priv->rx_ring_num; i++) {
790 priv->rx_ring[i].bytes = 0;
791 priv->rx_ring[i].packets = 0;
792 }
793
794 mlx4_en_set_default_moderation(priv);
795 err = mlx4_en_start_port(dev);
796 if (err)
453a6082 797 en_err(priv, "Failed starting port:%d\n", priv->port);
c27a02cd
YP		 798
799out:
800 mutex_unlock(&mdev->state_lock);
801 return err;
802}
803
804
805static int mlx4_en_close(struct net_device *dev)
806{
807 struct mlx4_en_priv *priv = netdev_priv(dev);
808 struct mlx4_en_dev *mdev = priv->mdev;
809
453a6082 810 en_dbg(IFDOWN, priv, "Close port called\n");
c27a02cd
YP		 811
812 mutex_lock(&mdev->state_lock);
813
814 mlx4_en_stop_port(dev);
815 netif_carrier_off(dev);
816
817 mutex_unlock(&mdev->state_lock);
818 return 0;
819}
820
18cc42a3 821void mlx4_en_free_resources(struct mlx4_en_priv *priv)
c27a02cd
YP		 822{
823 int i;
824
825 for (i = 0; i < priv->tx_ring_num; i++) {
826 if (priv->tx_ring[i].tx_info)
827 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
828 if (priv->tx_cq[i].buf)
829 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
830 }
831
832 for (i = 0; i < priv->rx_ring_num; i++) {
833 if (priv->rx_ring[i].rx_info)
834 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
835 if (priv->rx_cq[i].buf)
836 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
837 }
838}
839
18cc42a3 840int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
c27a02cd 841{
c27a02cd
YP		 842 struct mlx4_en_port_profile *prof = priv->prof;
843 int i;
844
845 /* Create tx Rings */
846 for (i = 0; i < priv->tx_ring_num; i++) {
847 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
848 prof->tx_ring_size, i, TX))
849 goto err;
850
851 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
852 prof->tx_ring_size, TXBB_SIZE))
853 goto err;
854 }
855
856 /* Create rx Rings */
857 for (i = 0; i < priv->rx_ring_num; i++) {
858 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
859 prof->rx_ring_size, i, RX))
860 goto err;
861
862 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
863 prof->rx_ring_size, priv->stride))
864 goto err;
865 }
866
867 return 0;
868
869err:
453a6082 870 en_err(priv, "Failed to allocate NIC resources\n");
c27a02cd
YP		 871 return -ENOMEM;
872}
873
874
875void mlx4_en_destroy_netdev(struct net_device *dev)
876{
877 struct mlx4_en_priv *priv = netdev_priv(dev);
878 struct mlx4_en_dev *mdev = priv->mdev;
879
453a6082 880 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
c27a02cd
YP		 881
882 /* Unregister device - this will close the port if it was up */
883 if (priv->registered)
884 unregister_netdev(dev);
885
886 if (priv->allocated)
887 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
888
889 cancel_delayed_work(&priv->stats_task);
c27a02cd
YP		 890 /* flush any pending task for this netdev */
891 flush_workqueue(mdev->workqueue);
892
893 /* Detach the netdev so tasks would not attempt to access it */
894 mutex_lock(&mdev->state_lock);
895 mdev->pndev[priv->port] = NULL;
896 mutex_unlock(&mdev->state_lock);
897
898 mlx4_en_free_resources(priv);
899 free_netdev(dev);
900}
901
902static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
903{
904 struct mlx4_en_priv *priv = netdev_priv(dev);
905 struct mlx4_en_dev *mdev = priv->mdev;
906 int err = 0;
907
453a6082 908 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
c27a02cd
YP		 909 dev->mtu, new_mtu);
910
911 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
453a6082 912 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
c27a02cd
YP		 913 return -EPERM;
914 }
915 dev->mtu = new_mtu;
916
917 if (netif_running(dev)) {
918 mutex_lock(&mdev->state_lock);
919 if (!mdev->device_up) {
920 /* NIC is probably restarting - let watchdog task reset
921 * the port */
453a6082 922 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
c27a02cd
YP		 923 } else {
924 mlx4_en_stop_port(dev);
925 mlx4_en_set_default_moderation(priv);
926 err = mlx4_en_start_port(dev);
927 if (err) {
453a6082 928 en_err(priv, "Failed restarting port:%d\n",
c27a02cd
YP		 929 priv->port);
930 queue_work(mdev->workqueue, &priv->watchdog_task);
931 }
932 }
933 mutex_unlock(&mdev->state_lock);
934 }
935 return 0;
936}
937
3addc568
SH		 938static const struct net_device_ops mlx4_netdev_ops = {
939 .ndo_open = mlx4_en_open,
940 .ndo_stop = mlx4_en_close,
941 .ndo_start_xmit = mlx4_en_xmit,
f813cad8 942 .ndo_select_queue = mlx4_en_select_queue,
3addc568
SH		 943 .ndo_get_stats = mlx4_en_get_stats,
944 .ndo_set_multicast_list = mlx4_en_set_multicast,
945 .ndo_set_mac_address = mlx4_en_set_mac,
52255bbe 946 .ndo_validate_addr = eth_validate_addr,
3addc568
SH		 947 .ndo_change_mtu = mlx4_en_change_mtu,
948 .ndo_tx_timeout = mlx4_en_tx_timeout,
949 .ndo_vlan_rx_register = mlx4_en_vlan_rx_register,
950 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
951 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
952#ifdef CONFIG_NET_POLL_CONTROLLER
953 .ndo_poll_controller = mlx4_en_netpoll,
954#endif
955};
956
c27a02cd
YP		 957int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
958 struct mlx4_en_port_profile *prof)
959{
960 struct net_device *dev;
961 struct mlx4_en_priv *priv;
962 int i;
963 int err;
964
f813cad8 965 dev = alloc_etherdev_mq(sizeof(struct mlx4_en_priv), prof->tx_ring_num);
c27a02cd
YP		 966 if (dev == NULL) {
967 mlx4_err(mdev, "Net device allocation failed\n");
968 return -ENOMEM;
969 }
970
971 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
972
973 /*
974 * Initialize driver private data
975 */
976
977 priv = netdev_priv(dev);
978 memset(priv, 0, sizeof(struct mlx4_en_priv));
979 priv->dev = dev;
980 priv->mdev = mdev;
981 priv->prof = prof;
982 priv->port = port;
983 priv->port_up = false;
984 priv->rx_csum = 1;
985 priv->flags = prof->flags;
986 priv->tx_ring_num = prof->tx_ring_num;
987 priv->rx_ring_num = prof->rx_ring_num;
988 priv->mc_list = NULL;
989 priv->mac_index = -1;
990 priv->msg_enable = MLX4_EN_MSG_LEVEL;
991 spin_lock_init(&priv->stats_lock);
992 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
993 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
c27a02cd
YP		 994 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
995 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
996 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
997
998 /* Query for default mac and max mtu */
999 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1000 priv->mac = mdev->dev->caps.def_mac[priv->port];
1001 if (ILLEGAL_MAC(priv->mac)) {
453a6082 1002 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
c27a02cd
YP		 1003 priv->port, priv->mac);
1004 err = -EINVAL;
1005 goto out;
1006 }
1007
1008 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1009 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1010 err = mlx4_en_alloc_resources(priv);
1011 if (err)
1012 goto out;
1013
c27a02cd
YP		 1014 /* Allocate page for receive rings */
1015 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1016 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1017 if (err) {
453a6082 1018 en_err(priv, "Failed to allocate page for rx qps\n");
c27a02cd
YP		 1019 goto out;
1020 }
1021 priv->allocated = 1;
1022
c27a02cd
YP		 1023 /*
1024 * Initialize netdev entry points
1025 */
3addc568 1026 dev->netdev_ops = &mlx4_netdev_ops;
c27a02cd 1027 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
f813cad8 1028 dev->real_num_tx_queues = MLX4_EN_NUM_TX_RINGS;
3addc568 1029
c27a02cd
YP		 1030 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1031
1032 /* Set defualt MAC */
1033 dev->addr_len = ETH_ALEN;
1034 for (i = 0; i < ETH_ALEN; i++)
1035 dev->dev_addr[ETH_ALEN - 1 - i] =
1036 (u8) (priv->mac >> (8 * i));
1037
1038 /*
1039 * Set driver features
1040 */
1041 dev->features |= NETIF_F_SG;
e486973e 1042 dev->vlan_features |= NETIF_F_SG;
45b4d66d 1043 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
e486973e 1044 dev->vlan_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
c27a02cd
YP		 1045 dev->features |= NETIF_F_HIGHDMA;
1046 dev->features |= NETIF_F_HW_VLAN_TX |
1047 NETIF_F_HW_VLAN_RX |
1048 NETIF_F_HW_VLAN_FILTER;
1049 if (mdev->profile.num_lro)
1050 dev->features |= NETIF_F_LRO;
1051 if (mdev->LSO_support) {
1052 dev->features |= NETIF_F_TSO;
1053 dev->features |= NETIF_F_TSO6;
e486973e
YP		 1054 dev->vlan_features |= NETIF_F_TSO;
1055 dev->vlan_features |= NETIF_F_TSO6;
c27a02cd
YP		 1056 }
1057
1058 mdev->pndev[port] = dev;
1059
1060 netif_carrier_off(dev);
1061 err = register_netdev(dev);
1062 if (err) {
453a6082 1063 en_err(priv, "Netdev registration failed for port %d\n", port);
c27a02cd
YP		 1064 goto out;
1065 }
453a6082
YP		 1066
1067 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1068 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1069
c27a02cd
YP		 1070 priv->registered = 1;
1071 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1072 return 0;
1073
1074out:
1075 mlx4_en_destroy_netdev(dev);
1076 return err;
1077}
1078
Linux kernel - Deliverables
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