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mlx4_en: Setting actual RX ring 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>
5a0e3ad6 38#include <linux/slab.h>
c27a02cd
YP		 39
40#include <linux/mlx4/driver.h>
41#include <linux/mlx4/device.h>
42#include <linux/mlx4/cmd.h>
43#include <linux/mlx4/cq.h>
44
45#include "mlx4_en.h"
46#include "en_port.h"
47
48
49static void mlx4_en_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
50{
51 struct mlx4_en_priv *priv = netdev_priv(dev);
52 struct mlx4_en_dev *mdev = priv->mdev;
53 int err;
54
453a6082 55 en_dbg(HW, priv, "Registering VLAN group:%p\n", grp);
c27a02cd
YP		 56 priv->vlgrp = grp;
57
58 mutex_lock(&mdev->state_lock);
59 if (mdev->device_up && priv->port_up) {
60 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, grp);
61 if (err)
453a6082 62 en_err(priv, "Failed configuring VLAN filter\n");
c27a02cd
YP		 63 }
64 mutex_unlock(&mdev->state_lock);
65}
66
67static void mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
68{
69 struct mlx4_en_priv *priv = netdev_priv(dev);
70 struct mlx4_en_dev *mdev = priv->mdev;
71 int err;
72
73 if (!priv->vlgrp)
74 return;
75
453a6082
YP		 76 en_dbg(HW, priv, "adding VLAN:%d (vlgrp entry:%p)\n",
77 vid, vlan_group_get_device(priv->vlgrp, vid));
c27a02cd
YP		 78
79 /* Add VID to port VLAN filter */
80 mutex_lock(&mdev->state_lock);
81 if (mdev->device_up && priv->port_up) {
82 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
83 if (err)
453a6082 84 en_err(priv, "Failed configuring VLAN filter\n");
c27a02cd
YP		 85 }
86 mutex_unlock(&mdev->state_lock);
87}
88
89static void mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
90{
91 struct mlx4_en_priv *priv = netdev_priv(dev);
92 struct mlx4_en_dev *mdev = priv->mdev;
93 int err;
94
95 if (!priv->vlgrp)
96 return;
97
453a6082
YP		 98 en_dbg(HW, priv, "Killing VID:%d (vlgrp:%p vlgrp entry:%p)\n",
99 vid, priv->vlgrp, vlan_group_get_device(priv->vlgrp, vid));
c27a02cd
YP		 100 vlan_group_set_device(priv->vlgrp, vid, NULL);
101
102 /* Remove VID from port VLAN filter */
103 mutex_lock(&mdev->state_lock);
104 if (mdev->device_up && priv->port_up) {
105 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
106 if (err)
453a6082 107 en_err(priv, "Failed configuring VLAN filter\n");
c27a02cd
YP		 108 }
109 mutex_unlock(&mdev->state_lock);
110}
111
112static u64 mlx4_en_mac_to_u64(u8 *addr)
113{
114 u64 mac = 0;
115 int i;
116
117 for (i = 0; i < ETH_ALEN; i++) {
118 mac <<= 8;
119 mac |= addr[i];
120 }
121 return mac;
122}
123
124static int mlx4_en_set_mac(struct net_device *dev, void *addr)
125{
126 struct mlx4_en_priv *priv = netdev_priv(dev);
127 struct mlx4_en_dev *mdev = priv->mdev;
128 struct sockaddr *saddr = addr;
129
130 if (!is_valid_ether_addr(saddr->sa_data))
131 return -EADDRNOTAVAIL;
132
133 memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
134 priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
135 queue_work(mdev->workqueue, &priv->mac_task);
136 return 0;
137}
138
139static void mlx4_en_do_set_mac(struct work_struct *work)
140{
141 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
142 mac_task);
143 struct mlx4_en_dev *mdev = priv->mdev;
144 int err = 0;
145
146 mutex_lock(&mdev->state_lock);
147 if (priv->port_up) {
148 /* Remove old MAC and insert the new one */
149 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
150 err = mlx4_register_mac(mdev->dev, priv->port,
151 priv->mac, &priv->mac_index);
152 if (err)
453a6082 153 en_err(priv, "Failed changing HW MAC address\n");
c27a02cd 154 } else
453a6082
YP		 155 en_dbg(HW, priv, "Port is down while "
156 "registering mac, exiting...\n");
c27a02cd
YP		 157
158 mutex_unlock(&mdev->state_lock);
159}
160
161static void mlx4_en_clear_list(struct net_device *dev)
162{
163 struct mlx4_en_priv *priv = netdev_priv(dev);
c27a02cd 164
ff6e2163
JP		 165 kfree(priv->mc_addrs);
166 priv->mc_addrs_cnt = 0;
c27a02cd
YP		 167}
168
169static void mlx4_en_cache_mclist(struct net_device *dev)
170{
171 struct mlx4_en_priv *priv = netdev_priv(dev);
22bedad3 172 struct netdev_hw_addr *ha;
ff6e2163
JP		 173 char *mc_addrs;
174 int mc_addrs_cnt = netdev_mc_count(dev);
175 int i;
176
177 mc_addrs = kmalloc(mc_addrs_cnt * ETH_ALEN, GFP_ATOMIC);
178 if (!mc_addrs) {
179 en_err(priv, "failed to allocate multicast list\n");
180 return;
c27a02cd 181 }
ff6e2163 182 i = 0;
22bedad3
JP		 183 netdev_for_each_mc_addr(ha, dev)
184 memcpy(mc_addrs + i++ * ETH_ALEN, ha->addr, ETH_ALEN);
ff6e2163
JP		 185 priv->mc_addrs = mc_addrs;
186 priv->mc_addrs_cnt = mc_addrs_cnt;
c27a02cd
YP		 187}
188
189
190static void mlx4_en_set_multicast(struct net_device *dev)
191{
192 struct mlx4_en_priv *priv = netdev_priv(dev);
193
194 if (!priv->port_up)
195 return;
196
197 queue_work(priv->mdev->workqueue, &priv->mcast_task);
198}
199
200static void mlx4_en_do_set_multicast(struct work_struct *work)
201{
202 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
203 mcast_task);
204 struct mlx4_en_dev *mdev = priv->mdev;
205 struct net_device *dev = priv->dev;
c27a02cd
YP		 206 u64 mcast_addr = 0;
207 int err;
208
209 mutex_lock(&mdev->state_lock);
210 if (!mdev->device_up) {
453a6082
YP		 211 en_dbg(HW, priv, "Card is not up, "
212 "ignoring multicast change.\n");
c27a02cd
YP		 213 goto out;
214 }
215 if (!priv->port_up) {
453a6082
YP		 216 en_dbg(HW, priv, "Port is down, "
217 "ignoring multicast change.\n");
c27a02cd
YP		 218 goto out;
219 }
220
221 /*
222 * Promsicuous mode: disable all filters
223 */
224
225 if (dev->flags & IFF_PROMISC) {
226 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
227 if (netif_msg_rx_status(priv))
453a6082 228 en_warn(priv, "Entering promiscuous mode\n");
c27a02cd
YP		 229 priv->flags |= MLX4_EN_FLAG_PROMISC;
230
231 /* Enable promiscouos mode */
232 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
233 priv->base_qpn, 1);
234 if (err)
453a6082
YP		 235 en_err(priv, "Failed enabling "
236 "promiscous mode\n");
c27a02cd
YP		 237
238 /* Disable port multicast filter (unconditionally) */
239 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
240 0, MLX4_MCAST_DISABLE);
241 if (err)
453a6082
YP		 242 en_err(priv, "Failed disabling "
243 "multicast filter\n");
c27a02cd
YP		 244
245 /* Disable port VLAN filter */
246 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, NULL);
247 if (err)
453a6082 248 en_err(priv, "Failed disabling VLAN filter\n");
c27a02cd
YP		 249 }
250 goto out;
251 }
252
253 /*
254 * Not in promiscous mode
255 */
256
257 if (priv->flags & MLX4_EN_FLAG_PROMISC) {
258 if (netif_msg_rx_status(priv))
453a6082 259 en_warn(priv, "Leaving promiscuous mode\n");
c27a02cd
YP		 260 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
261
262 /* Disable promiscouos mode */
263 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port,
264 priv->base_qpn, 0);
265 if (err)
453a6082 266 en_err(priv, "Failed disabling promiscous mode\n");
c27a02cd
YP		 267
268 /* Enable port VLAN filter */
269 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv->port, priv->vlgrp);
270 if (err)
453a6082 271 en_err(priv, "Failed enabling VLAN filter\n");
c27a02cd
YP		 272 }
273
274 /* Enable/disable the multicast filter according to IFF_ALLMULTI */
275 if (dev->flags & IFF_ALLMULTI) {
276 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
277 0, MLX4_MCAST_DISABLE);
278 if (err)
453a6082 279 en_err(priv, "Failed disabling multicast filter\n");
c27a02cd 280 } else {
ff6e2163
JP		 281 int i;
282
c27a02cd
YP		 283 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
284 0, MLX4_MCAST_DISABLE);
285 if (err)
453a6082 286 en_err(priv, "Failed disabling multicast filter\n");
c27a02cd
YP		 287
288 /* Flush mcast filter and init it with broadcast address */
289 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
290 1, MLX4_MCAST_CONFIG);
291
292 /* Update multicast list - we cache all addresses so they won't
293 * change while HW is updated holding the command semaphor */
294 netif_tx_lock_bh(dev);
295 mlx4_en_cache_mclist(dev);
296 netif_tx_unlock_bh(dev);
ff6e2163
JP		 297 for (i = 0; i < priv->mc_addrs_cnt; i++) {
298 mcast_addr =
299 mlx4_en_mac_to_u64(priv->mc_addrs + i * ETH_ALEN);
c27a02cd
YP		 300 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
301 mcast_addr, 0, MLX4_MCAST_CONFIG);
302 }
303 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
304 0, MLX4_MCAST_ENABLE);
305 if (err)
453a6082 306 en_err(priv, "Failed enabling multicast filter\n");
c27a02cd
YP		 307
308 mlx4_en_clear_list(dev);
309 }
310out:
311 mutex_unlock(&mdev->state_lock);
312}
313
314#ifdef CONFIG_NET_POLL_CONTROLLER
315static void mlx4_en_netpoll(struct net_device *dev)
316{
317 struct mlx4_en_priv *priv = netdev_priv(dev);
318 struct mlx4_en_cq *cq;
319 unsigned long flags;
320 int i;
321
322 for (i = 0; i < priv->rx_ring_num; i++) {
323 cq = &priv->rx_cq[i];
324 spin_lock_irqsave(&cq->lock, flags);
325 napi_synchronize(&cq->napi);
326 mlx4_en_process_rx_cq(dev, cq, 0);
327 spin_unlock_irqrestore(&cq->lock, flags);
328 }
329}
330#endif
331
332static void mlx4_en_tx_timeout(struct net_device *dev)
333{
334 struct mlx4_en_priv *priv = netdev_priv(dev);
335 struct mlx4_en_dev *mdev = priv->mdev;
336
337 if (netif_msg_timer(priv))
453a6082 338 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
c27a02cd 339
1e338db5 340 priv->port_stats.tx_timeout++;
453a6082 341 en_dbg(DRV, priv, "Scheduling watchdog\n");
1e338db5 342 queue_work(mdev->workqueue, &priv->watchdog_task);
c27a02cd
YP		 343}
344
345
346static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
347{
348 struct mlx4_en_priv *priv = netdev_priv(dev);
349
350 spin_lock_bh(&priv->stats_lock);
351 memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
352 spin_unlock_bh(&priv->stats_lock);
353
354 return &priv->ret_stats;
355}
356
357static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
358{
c27a02cd
YP		 359 struct mlx4_en_cq *cq;
360 int i;
361
362 /* If we haven't received a specific coalescing setting
98a1708d 363 * (module param), we set the moderation parameters as follows:
c27a02cd
YP		 364 * - moder_cnt is set to the number of mtu sized packets to
365 * satisfy our coelsing target.
366 * - moder_time is set to a fixed value.
367 */
3db36fb2 368 priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
60b9f9e5 369 priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
453a6082
YP		 370 en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
371 "rx_frames:%d rx_usecs:%d\n",
c27a02cd
YP		 372 priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
373
374 /* Setup cq moderation params */
375 for (i = 0; i < priv->rx_ring_num; i++) {
376 cq = &priv->rx_cq[i];
377 cq->moder_cnt = priv->rx_frames;
378 cq->moder_time = priv->rx_usecs;
379 }
380
381 for (i = 0; i < priv->tx_ring_num; i++) {
382 cq = &priv->tx_cq[i];
383 cq->moder_cnt = MLX4_EN_TX_COAL_PKTS;
384 cq->moder_time = MLX4_EN_TX_COAL_TIME;
385 }
386
387 /* Reset auto-moderation params */
388 priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
389 priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
390 priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
391 priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
392 priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
60b9f9e5 393 priv->adaptive_rx_coal = 1;
c27a02cd
YP		 394 priv->last_moder_time = MLX4_EN_AUTO_CONF;
395 priv->last_moder_jiffies = 0;
396 priv->last_moder_packets = 0;
397 priv->last_moder_tx_packets = 0;
398 priv->last_moder_bytes = 0;
399}
400
401static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
402{
403 unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
c27a02cd
YP		 404 struct mlx4_en_cq *cq;
405 unsigned long packets;
406 unsigned long rate;
407 unsigned long avg_pkt_size;
408 unsigned long rx_packets;
409 unsigned long rx_bytes;
a35ee541 410 unsigned long rx_byte_diff;
c27a02cd
YP		 411 unsigned long tx_packets;
412 unsigned long tx_pkt_diff;
413 unsigned long rx_pkt_diff;
414 int moder_time;
415 int i, err;
416
417 if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
418 return;
419
420 spin_lock_bh(&priv->stats_lock);
421 rx_packets = priv->stats.rx_packets;
422 rx_bytes = priv->stats.rx_bytes;
423 tx_packets = priv->stats.tx_packets;
424 spin_unlock_bh(&priv->stats_lock);
425
426 if (!priv->last_moder_jiffies || !period)
427 goto out;
428
429 tx_pkt_diff = ((unsigned long) (tx_packets -
430 priv->last_moder_tx_packets));
431 rx_pkt_diff = ((unsigned long) (rx_packets -
432 priv->last_moder_packets));
433 packets = max(tx_pkt_diff, rx_pkt_diff);
a35ee541
YP		 434 rx_byte_diff = rx_bytes - priv->last_moder_bytes;
435 rx_byte_diff = rx_byte_diff ? rx_byte_diff : 1;
c27a02cd
YP		 436 rate = packets * HZ / period;
437 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
438 priv->last_moder_bytes)) / packets : 0;
439
440 /* Apply auto-moderation only when packet rate exceeds a rate that
441 * it matters */
442 if (rate > MLX4_EN_RX_RATE_THRESH) {
443 /* If tx and rx packet rates are not balanced, assume that
444 * traffic is mainly BW bound and apply maximum moderation.
445 * Otherwise, moderate according to packet rate */
a35ee541
YP		 446 if (2 * tx_pkt_diff > 3 * rx_pkt_diff &&
447 rx_pkt_diff / rx_byte_diff <
448 MLX4_EN_SMALL_PKT_SIZE)
449 moder_time = priv->rx_usecs_low;
450 else if (2 * rx_pkt_diff > 3 * tx_pkt_diff)
c27a02cd 451 moder_time = priv->rx_usecs_high;
a35ee541 452 else {
c27a02cd
YP		 453 if (rate < priv->pkt_rate_low)
454 moder_time = priv->rx_usecs_low;
455 else if (rate > priv->pkt_rate_high)
456 moder_time = priv->rx_usecs_high;
457 else
458 moder_time = (rate - priv->pkt_rate_low) *
459 (priv->rx_usecs_high - priv->rx_usecs_low) /
460 (priv->pkt_rate_high - priv->pkt_rate_low) +
461 priv->rx_usecs_low;
462 }
463 } else {
464 /* When packet rate is low, use default moderation rather than
465 * 0 to prevent interrupt storms if traffic suddenly increases */
466 moder_time = priv->rx_usecs;
467 }
468
453a6082
YP		 469 en_dbg(INTR, priv, "tx rate:%lu rx_rate:%lu\n",
470 tx_pkt_diff * HZ / period, rx_pkt_diff * HZ / period);
c27a02cd 471
453a6082
YP		 472 en_dbg(INTR, priv, "Rx moder_time changed from:%d to %d period:%lu "
473 "[jiff] packets:%lu avg_pkt_size:%lu rate:%lu [p/s])\n",
c27a02cd
YP		 474 priv->last_moder_time, moder_time, period, packets,
475 avg_pkt_size, rate);
476
477 if (moder_time != priv->last_moder_time) {
478 priv->last_moder_time = moder_time;
479 for (i = 0; i < priv->rx_ring_num; i++) {
480 cq = &priv->rx_cq[i];
481 cq->moder_time = moder_time;
482 err = mlx4_en_set_cq_moder(priv, cq);
483 if (err) {
453a6082 484 en_err(priv, "Failed modifying moderation for cq:%d\n", i);
c27a02cd
YP		 485 break;
486 }
487 }
488 }
489
490out:
491 priv->last_moder_packets = rx_packets;
492 priv->last_moder_tx_packets = tx_packets;
493 priv->last_moder_bytes = rx_bytes;
494 priv->last_moder_jiffies = jiffies;
495}
496
497static void mlx4_en_do_get_stats(struct work_struct *work)
498{
bf6aede7 499 struct delayed_work *delay = to_delayed_work(work);
c27a02cd
YP		 500 struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
501 stats_task);
502 struct mlx4_en_dev *mdev = priv->mdev;
503 int err;
504
505 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
506 if (err)
2381a55c 507 en_dbg(HW, priv, "Could not update stats\n");
c27a02cd
YP		 508
509 mutex_lock(&mdev->state_lock);
510 if (mdev->device_up) {
511 if (priv->port_up)
512 mlx4_en_auto_moderation(priv);
513
514 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
515 }
516 mutex_unlock(&mdev->state_lock);
517}
518
519static void mlx4_en_linkstate(struct work_struct *work)
520{
521 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
522 linkstate_task);
523 struct mlx4_en_dev *mdev = priv->mdev;
524 int linkstate = priv->link_state;
525
526 mutex_lock(&mdev->state_lock);
527 /* If observable port state changed set carrier state and
528 * report to system log */
529 if (priv->last_link_state != linkstate) {
530 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
453a6082 531 en_dbg(LINK, priv, "Link Down\n");
c27a02cd
YP		 532 netif_carrier_off(priv->dev);
533 } else {
453a6082 534 en_dbg(LINK, priv, "Link Up\n");
c27a02cd
YP		 535 netif_carrier_on(priv->dev);
536 }
537 }
538 priv->last_link_state = linkstate;
539 mutex_unlock(&mdev->state_lock);
540}
541
542
18cc42a3 543int mlx4_en_start_port(struct net_device *dev)
c27a02cd
YP		 544{
545 struct mlx4_en_priv *priv = netdev_priv(dev);
546 struct mlx4_en_dev *mdev = priv->mdev;
547 struct mlx4_en_cq *cq;
548 struct mlx4_en_tx_ring *tx_ring;
c27a02cd
YP		 549 int rx_index = 0;
550 int tx_index = 0;
c27a02cd
YP		 551 int err = 0;
552 int i;
553 int j;
554
555 if (priv->port_up) {
453a6082 556 en_dbg(DRV, priv, "start port called while port already up\n");
c27a02cd
YP		 557 return 0;
558 }
559
560 /* Calculate Rx buf size */
561 dev->mtu = min(dev->mtu, priv->max_mtu);
562 mlx4_en_calc_rx_buf(dev);
453a6082 563 en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
38aab07c 564
c27a02cd 565 /* Configure rx cq's and rings */
38aab07c
YP		 566 err = mlx4_en_activate_rx_rings(priv);
567 if (err) {
453a6082 568 en_err(priv, "Failed to activate RX rings\n");
38aab07c
YP		 569 return err;
570 }
c27a02cd
YP		 571 for (i = 0; i < priv->rx_ring_num; i++) {
572 cq = &priv->rx_cq[i];
c27a02cd
YP		 573
574 err = mlx4_en_activate_cq(priv, cq);
575 if (err) {
453a6082 576 en_err(priv, "Failed activating Rx CQ\n");
a4233304 577 goto cq_err;
c27a02cd
YP		 578 }
579 for (j = 0; j < cq->size; j++)
580 cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
581 err = mlx4_en_set_cq_moder(priv, cq);
582 if (err) {
453a6082 583 en_err(priv, "Failed setting cq moderation parameters");
c27a02cd
YP		 584 mlx4_en_deactivate_cq(priv, cq);
585 goto cq_err;
586 }
587 mlx4_en_arm_cq(priv, cq);
38aab07c 588 priv->rx_ring[i].cqn = cq->mcq.cqn;
c27a02cd
YP		 589 ++rx_index;
590 }
591
c27a02cd
YP		 592 err = mlx4_en_config_rss_steer(priv);
593 if (err) {
453a6082 594 en_err(priv, "Failed configuring rss steering\n");
38aab07c 595 goto cq_err;
c27a02cd
YP		 596 }
597
598 /* Configure tx cq's and rings */
599 for (i = 0; i < priv->tx_ring_num; i++) {
600 /* Configure cq */
601 cq = &priv->tx_cq[i];
602 err = mlx4_en_activate_cq(priv, cq);
603 if (err) {
453a6082 604 en_err(priv, "Failed allocating Tx CQ\n");
c27a02cd
YP		 605 goto tx_err;
606 }
607 err = mlx4_en_set_cq_moder(priv, cq);
608 if (err) {
453a6082 609 en_err(priv, "Failed setting cq moderation parameters");
c27a02cd
YP		 610 mlx4_en_deactivate_cq(priv, cq);
611 goto tx_err;
612 }
453a6082 613 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
c27a02cd
YP		 614 cq->buf->wqe_index = cpu_to_be16(0xffff);
615
616 /* Configure ring */
617 tx_ring = &priv->tx_ring[i];
9f519f68 618 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn);
c27a02cd 619 if (err) {
453a6082 620 en_err(priv, "Failed allocating Tx ring\n");
c27a02cd
YP		 621 mlx4_en_deactivate_cq(priv, cq);
622 goto tx_err;
623 }
624 /* Set initial ownership of all Tx TXBBs to SW (1) */
625 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
626 *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
627 ++tx_index;
628 }
629
630 /* Configure port */
631 err = mlx4_SET_PORT_general(mdev->dev, priv->port,
632 priv->rx_skb_size + ETH_FCS_LEN,
d53b93f2
YP		 633 priv->prof->tx_pause,
634 priv->prof->tx_ppp,
635 priv->prof->rx_pause,
636 priv->prof->rx_ppp);
c27a02cd 637 if (err) {
453a6082
YP		 638 en_err(priv, "Failed setting port general configurations "
639 "for port %d, with error %d\n", priv->port, err);
c27a02cd
YP		 640 goto tx_err;
641 }
642 /* Set default qp number */
643 err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
644 if (err) {
453a6082 645 en_err(priv, "Failed setting default qp numbers\n");
c27a02cd
YP		 646 goto tx_err;
647 }
648 /* Set port mac number */
453a6082 649 en_dbg(DRV, priv, "Setting mac for port %d\n", priv->port);
c27a02cd
YP		 650 err = mlx4_register_mac(mdev->dev, priv->port,
651 priv->mac, &priv->mac_index);
652 if (err) {
453a6082 653 en_err(priv, "Failed setting port mac\n");
c27a02cd
YP		 654 goto tx_err;
655 }
656
657 /* Init port */
453a6082 658 en_dbg(HW, priv, "Initializing port\n");
c27a02cd
YP		 659 err = mlx4_INIT_PORT(mdev->dev, priv->port);
660 if (err) {
453a6082 661 en_err(priv, "Failed Initializing port\n");
c27a02cd
YP		 662 goto mac_err;
663 }
664
665 /* Schedule multicast task to populate multicast list */
666 queue_work(mdev->workqueue, &priv->mcast_task);
667
668 priv->port_up = true;
a11faac7 669 netif_tx_start_all_queues(dev);
c27a02cd
YP		 670 return 0;
671
672mac_err:
673 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
674tx_err:
675 while (tx_index--) {
676 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
677 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
678 }
679
680 mlx4_en_release_rss_steer(priv);
c27a02cd
YP		 681cq_err:
682 while (rx_index--)
683 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
38aab07c
YP		 684 for (i = 0; i < priv->rx_ring_num; i++)
685 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
c27a02cd
YP		 686
687 return err; /* need to close devices */
688}
689
690
18cc42a3 691void mlx4_en_stop_port(struct net_device *dev)
c27a02cd
YP		 692{
693 struct mlx4_en_priv *priv = netdev_priv(dev);
694 struct mlx4_en_dev *mdev = priv->mdev;
695 int i;
696
697 if (!priv->port_up) {
453a6082 698 en_dbg(DRV, priv, "stop port called while port already down\n");
c27a02cd
YP		 699 return;
700 }
c27a02cd
YP		 701
702 /* Synchronize with tx routine */
703 netif_tx_lock_bh(dev);
3c05f5ef 704 netif_tx_stop_all_queues(dev);
c27a02cd
YP		 705 netif_tx_unlock_bh(dev);
706
707 /* close port*/
3c05f5ef 708 priv->port_up = false;
c27a02cd
YP		 709 mlx4_CLOSE_PORT(mdev->dev, priv->port);
710
711 /* Unregister Mac address for the port */
712 mlx4_unregister_mac(mdev->dev, priv->port, priv->mac_index);
713
714 /* Free TX Rings */
715 for (i = 0; i < priv->tx_ring_num; i++) {
716 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
717 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
718 }
719 msleep(10);
720
721 for (i = 0; i < priv->tx_ring_num; i++)
722 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
723
724 /* Free RSS qps */
725 mlx4_en_release_rss_steer(priv);
726
727 /* Free RX Rings */
728 for (i = 0; i < priv->rx_ring_num; i++) {
729 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
730 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
731 msleep(1);
732 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
733 }
734}
735
736static void mlx4_en_restart(struct work_struct *work)
737{
738 struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
739 watchdog_task);
740 struct mlx4_en_dev *mdev = priv->mdev;
741 struct net_device *dev = priv->dev;
742
453a6082 743 en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
1e338db5
YP		 744
745 mutex_lock(&mdev->state_lock);
746 if (priv->port_up) {
747 mlx4_en_stop_port(dev);
748 if (mlx4_en_start_port(dev))
453a6082 749 en_err(priv, "Failed restarting port %d\n", priv->port);
1e338db5
YP		 750 }
751 mutex_unlock(&mdev->state_lock);
c27a02cd
YP		 752}
753
754
755static int mlx4_en_open(struct net_device *dev)
756{
757 struct mlx4_en_priv *priv = netdev_priv(dev);
758 struct mlx4_en_dev *mdev = priv->mdev;
759 int i;
760 int err = 0;
761
762 mutex_lock(&mdev->state_lock);
763
764 if (!mdev->device_up) {
453a6082 765 en_err(priv, "Cannot open - device down/disabled\n");
c27a02cd
YP		 766 err = -EBUSY;
767 goto out;
768 }
769
770 /* Reset HW statistics and performance counters */
771 if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
453a6082 772 en_dbg(HW, priv, "Failed dumping statistics\n");
c27a02cd
YP		 773
774 memset(&priv->stats, 0, sizeof(priv->stats));
775 memset(&priv->pstats, 0, sizeof(priv->pstats));
776
777 for (i = 0; i < priv->tx_ring_num; i++) {
778 priv->tx_ring[i].bytes = 0;
779 priv->tx_ring[i].packets = 0;
780 }
781 for (i = 0; i < priv->rx_ring_num; i++) {
782 priv->rx_ring[i].bytes = 0;
783 priv->rx_ring[i].packets = 0;
784 }
785
786 mlx4_en_set_default_moderation(priv);
787 err = mlx4_en_start_port(dev);
788 if (err)
453a6082 789 en_err(priv, "Failed starting port:%d\n", priv->port);
c27a02cd
YP		 790
791out:
792 mutex_unlock(&mdev->state_lock);
793 return err;
794}
795
796
797static int mlx4_en_close(struct net_device *dev)
798{
799 struct mlx4_en_priv *priv = netdev_priv(dev);
800 struct mlx4_en_dev *mdev = priv->mdev;
801
453a6082 802 en_dbg(IFDOWN, priv, "Close port called\n");
c27a02cd
YP		 803
804 mutex_lock(&mdev->state_lock);
805
806 mlx4_en_stop_port(dev);
807 netif_carrier_off(dev);
808
809 mutex_unlock(&mdev->state_lock);
810 return 0;
811}
812
18cc42a3 813void mlx4_en_free_resources(struct mlx4_en_priv *priv)
c27a02cd
YP		 814{
815 int i;
816
817 for (i = 0; i < priv->tx_ring_num; i++) {
818 if (priv->tx_ring[i].tx_info)
819 mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
820 if (priv->tx_cq[i].buf)
821 mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
822 }
823
824 for (i = 0; i < priv->rx_ring_num; i++) {
825 if (priv->rx_ring[i].rx_info)
826 mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i]);
827 if (priv->rx_cq[i].buf)
828 mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
829 }
830}
831
18cc42a3 832int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
c27a02cd 833{
c27a02cd
YP		 834 struct mlx4_en_port_profile *prof = priv->prof;
835 int i;
836
837 /* Create tx Rings */
838 for (i = 0; i < priv->tx_ring_num; i++) {
839 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
840 prof->tx_ring_size, i, TX))
841 goto err;
842
843 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
844 prof->tx_ring_size, TXBB_SIZE))
845 goto err;
846 }
847
848 /* Create rx Rings */
849 for (i = 0; i < priv->rx_ring_num; i++) {
850 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
851 prof->rx_ring_size, i, RX))
852 goto err;
853
854 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
855 prof->rx_ring_size, priv->stride))
856 goto err;
857 }
858
859 return 0;
860
861err:
453a6082 862 en_err(priv, "Failed to allocate NIC resources\n");
c27a02cd
YP		 863 return -ENOMEM;
864}
865
866
867void mlx4_en_destroy_netdev(struct net_device *dev)
868{
869 struct mlx4_en_priv *priv = netdev_priv(dev);
870 struct mlx4_en_dev *mdev = priv->mdev;
871
453a6082 872 en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
c27a02cd
YP		 873
874 /* Unregister device - this will close the port if it was up */
875 if (priv->registered)
876 unregister_netdev(dev);
877
878 if (priv->allocated)
879 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
880
881 cancel_delayed_work(&priv->stats_task);
c27a02cd
YP		 882 /* flush any pending task for this netdev */
883 flush_workqueue(mdev->workqueue);
884
885 /* Detach the netdev so tasks would not attempt to access it */
886 mutex_lock(&mdev->state_lock);
887 mdev->pndev[priv->port] = NULL;
888 mutex_unlock(&mdev->state_lock);
889
890 mlx4_en_free_resources(priv);
891 free_netdev(dev);
892}
893
894static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
895{
896 struct mlx4_en_priv *priv = netdev_priv(dev);
897 struct mlx4_en_dev *mdev = priv->mdev;
898 int err = 0;
899
453a6082 900 en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
c27a02cd
YP		 901 dev->mtu, new_mtu);
902
903 if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
453a6082 904 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
c27a02cd
YP		 905 return -EPERM;
906 }
907 dev->mtu = new_mtu;
908
909 if (netif_running(dev)) {
910 mutex_lock(&mdev->state_lock);
911 if (!mdev->device_up) {
912 /* NIC is probably restarting - let watchdog task reset
913 * the port */
453a6082 914 en_dbg(DRV, priv, "Change MTU called with card down!?\n");
c27a02cd
YP		 915 } else {
916 mlx4_en_stop_port(dev);
917 mlx4_en_set_default_moderation(priv);
918 err = mlx4_en_start_port(dev);
919 if (err) {
453a6082 920 en_err(priv, "Failed restarting port:%d\n",
c27a02cd
YP		 921 priv->port);
922 queue_work(mdev->workqueue, &priv->watchdog_task);
923 }
924 }
925 mutex_unlock(&mdev->state_lock);
926 }
927 return 0;
928}
929
3addc568
SH		 930static const struct net_device_ops mlx4_netdev_ops = {
931 .ndo_open = mlx4_en_open,
932 .ndo_stop = mlx4_en_close,
933 .ndo_start_xmit = mlx4_en_xmit,
f813cad8 934 .ndo_select_queue = mlx4_en_select_queue,
3addc568
SH		 935 .ndo_get_stats = mlx4_en_get_stats,
936 .ndo_set_multicast_list = mlx4_en_set_multicast,
937 .ndo_set_mac_address = mlx4_en_set_mac,
52255bbe 938 .ndo_validate_addr = eth_validate_addr,
3addc568
SH		 939 .ndo_change_mtu = mlx4_en_change_mtu,
940 .ndo_tx_timeout = mlx4_en_tx_timeout,
941 .ndo_vlan_rx_register = mlx4_en_vlan_rx_register,
942 .ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
943 .ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
944#ifdef CONFIG_NET_POLL_CONTROLLER
945 .ndo_poll_controller = mlx4_en_netpoll,
946#endif
947};
948
c27a02cd
YP		 949int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
950 struct mlx4_en_port_profile *prof)
951{
952 struct net_device *dev;
953 struct mlx4_en_priv *priv;
954 int i;
955 int err;
956
f813cad8 957 dev = alloc_etherdev_mq(sizeof(struct mlx4_en_priv), prof->tx_ring_num);
c27a02cd
YP		 958 if (dev == NULL) {
959 mlx4_err(mdev, "Net device allocation failed\n");
960 return -ENOMEM;
961 }
962
963 SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
741a00be 964 dev->dev_id = port - 1;
c27a02cd
YP		 965
966 /*
967 * Initialize driver private data
968 */
969
970 priv = netdev_priv(dev);
971 memset(priv, 0, sizeof(struct mlx4_en_priv));
972 priv->dev = dev;
973 priv->mdev = mdev;
974 priv->prof = prof;
975 priv->port = port;
976 priv->port_up = false;
977 priv->rx_csum = 1;
978 priv->flags = prof->flags;
979 priv->tx_ring_num = prof->tx_ring_num;
980 priv->rx_ring_num = prof->rx_ring_num;
c27a02cd
YP		 981 priv->mac_index = -1;
982 priv->msg_enable = MLX4_EN_MSG_LEVEL;
983 spin_lock_init(&priv->stats_lock);
984 INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
985 INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
c27a02cd
YP		 986 INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
987 INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
988 INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
989
990 /* Query for default mac and max mtu */
991 priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
992 priv->mac = mdev->dev->caps.def_mac[priv->port];
993 if (ILLEGAL_MAC(priv->mac)) {
453a6082 994 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
c27a02cd
YP		 995 priv->port, priv->mac);
996 err = -EINVAL;
997 goto out;
998 }
999
1000 priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1001 DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1002 err = mlx4_en_alloc_resources(priv);
1003 if (err)
1004 goto out;
1005
c27a02cd
YP		 1006 /* Allocate page for receive rings */
1007 err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1008 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1009 if (err) {
453a6082 1010 en_err(priv, "Failed to allocate page for rx qps\n");
c27a02cd
YP		 1011 goto out;
1012 }
1013 priv->allocated = 1;
1014
c27a02cd
YP		 1015 /*
1016 * Initialize netdev entry points
1017 */
3addc568 1018 dev->netdev_ops = &mlx4_netdev_ops;
c27a02cd 1019 dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
f813cad8 1020 dev->real_num_tx_queues = MLX4_EN_NUM_TX_RINGS;
3addc568 1021
c27a02cd
YP		 1022 SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1023
1024 /* Set defualt MAC */
1025 dev->addr_len = ETH_ALEN;
1026 for (i = 0; i < ETH_ALEN; i++)
1027 dev->dev_addr[ETH_ALEN - 1 - i] =
1028 (u8) (priv->mac >> (8 * i));
1029
1030 /*
1031 * Set driver features
1032 */
1033 dev->features |= NETIF_F_SG;
e486973e 1034 dev->vlan_features |= NETIF_F_SG;
45b4d66d 1035 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
e486973e 1036 dev->vlan_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
c27a02cd
YP		 1037 dev->features |= NETIF_F_HIGHDMA;
1038 dev->features |= NETIF_F_HW_VLAN_TX |
1039 NETIF_F_HW_VLAN_RX |
1040 NETIF_F_HW_VLAN_FILTER;
f3c58ace 1041 dev->features |= NETIF_F_LRO;
c27a02cd
YP		 1042 if (mdev->LSO_support) {
1043 dev->features |= NETIF_F_TSO;
1044 dev->features |= NETIF_F_TSO6;
e486973e
YP		 1045 dev->vlan_features |= NETIF_F_TSO;
1046 dev->vlan_features |= NETIF_F_TSO6;
c27a02cd
YP		 1047 }
1048
1049 mdev->pndev[port] = dev;
1050
1051 netif_carrier_off(dev);
1052 err = register_netdev(dev);
1053 if (err) {
453a6082 1054 en_err(priv, "Netdev registration failed for port %d\n", port);
c27a02cd
YP		 1055 goto out;
1056 }
453a6082
YP		 1057
1058 en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1059 en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1060
c27a02cd
YP		 1061 priv->registered = 1;
1062 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1063 return 0;
1064
1065out:
1066 mlx4_en_destroy_netdev(dev);
1067 return err;
1068}
1069
Linux kernel - Deliverables
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