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