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drm/i915: fix port checks for MST support on gen >= 11
[linux/fpc-iii.git] / net / sched / sch_mqprio.c
blob008db8d59acef66770ba28c696e8588e4b47b576
1 /*
2 * net/sched/sch_mqprio.c
3 *
4 * Copyright (c) 2010 John Fastabend <john.r.fastabend@intel.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 */
10
11 #include <linux/types.h>
12 #include <linux/slab.h>
13 #include <linux/kernel.h>
14 #include <linux/string.h>
15 #include <linux/errno.h>
16 #include <linux/skbuff.h>
17 #include <linux/module.h>
18 #include <net/netlink.h>
19 #include <net/pkt_sched.h>
20 #include <net/sch_generic.h>
21 #include <net/pkt_cls.h>
22
23 struct mqprio_sched {
24 struct Qdisc **qdiscs;
25 u16 mode;
26 u16 shaper;
27 int hw_offload;
28 u32 flags;
29 u64 min_rate[TC_QOPT_MAX_QUEUE];
30 u64 max_rate[TC_QOPT_MAX_QUEUE];
31 };
32
33 static void mqprio_destroy(struct Qdisc *sch)
34 {
35 struct net_device *dev = qdisc_dev(sch);
36 struct mqprio_sched *priv = qdisc_priv(sch);
37 unsigned int ntx;
38
39 if (priv->qdiscs) {
40 for (ntx = 0;
41 ntx < dev->num_tx_queues && priv->qdiscs[ntx];
42 ntx++)
43 qdisc_destroy(priv->qdiscs[ntx]);
44 kfree(priv->qdiscs);
45 }
46
47 if (priv->hw_offload && dev->netdev_ops->ndo_setup_tc) {
48 struct tc_mqprio_qopt_offload mqprio = { { 0 } };
49
50 switch (priv->mode) {
51 case TC_MQPRIO_MODE_DCB:
52 case TC_MQPRIO_MODE_CHANNEL:
53 dev->netdev_ops->ndo_setup_tc(dev,
54 TC_SETUP_QDISC_MQPRIO,
55 &mqprio);
56 break;
57 default:
58 return;
59 }
60 } else {
61 netdev_set_num_tc(dev, 0);
62 }
63 }
64
65 static int mqprio_parse_opt(struct net_device *dev, struct tc_mqprio_qopt *qopt)
66 {
67 int i, j;
68
69 /* Verify num_tc is not out of max range */
70 if (qopt->num_tc > TC_MAX_QUEUE)
71 return -EINVAL;
72
73 /* Verify priority mapping uses valid tcs */
74 for (i = 0; i < TC_BITMASK + 1; i++) {
75 if (qopt->prio_tc_map[i] >= qopt->num_tc)
76 return -EINVAL;
77 }
78
79 /* Limit qopt->hw to maximum supported offload value. Drivers have
80 * the option of overriding this later if they don't support the a
81 * given offload type.
82 */
83 if (qopt->hw > TC_MQPRIO_HW_OFFLOAD_MAX)
84 qopt->hw = TC_MQPRIO_HW_OFFLOAD_MAX;
85
86 /* If hardware offload is requested we will leave it to the device
87 * to either populate the queue counts itself or to validate the
88 * provided queue counts. If ndo_setup_tc is not present then
89 * hardware doesn't support offload and we should return an error.
90 */
91 if (qopt->hw)
92 return dev->netdev_ops->ndo_setup_tc ? 0 : -EINVAL;
93
94 for (i = 0; i < qopt->num_tc; i++) {
95 unsigned int last = qopt->offset[i] + qopt->count[i];
96
97 /* Verify the queue count is in tx range being equal to the
98 * real_num_tx_queues indicates the last queue is in use.
99 */
100 if (qopt->offset[i] >= dev->real_num_tx_queues ||
101 !qopt->count[i] ||
102 last > dev->real_num_tx_queues)
103 return -EINVAL;
104
105 /* Verify that the offset and counts do not overlap */
106 for (j = i + 1; j < qopt->num_tc; j++) {
107 if (last > qopt->offset[j])
108 return -EINVAL;
109 }
110 }
111
112 return 0;
113 }
114
115 static const struct nla_policy mqprio_policy[TCA_MQPRIO_MAX + 1] = {
116 [TCA_MQPRIO_MODE] = { .len = sizeof(u16) },
117 [TCA_MQPRIO_SHAPER] = { .len = sizeof(u16) },
118 [TCA_MQPRIO_MIN_RATE64] = { .type = NLA_NESTED },
119 [TCA_MQPRIO_MAX_RATE64] = { .type = NLA_NESTED },
120 };
121
122 static int parse_attr(struct nlattr *tb[], int maxtype, struct nlattr *nla,
123 const struct nla_policy *policy, int len)
124 {
125 int nested_len = nla_len(nla) - NLA_ALIGN(len);
126
127 if (nested_len >= nla_attr_size(0))
128 return nla_parse(tb, maxtype, nla_data(nla) + NLA_ALIGN(len),
129 nested_len, policy, NULL);
130
131 memset(tb, 0, sizeof(struct nlattr *) * (maxtype + 1));
132 return 0;
133 }
134
135 static int mqprio_init(struct Qdisc *sch, struct nlattr *opt,
136 struct netlink_ext_ack *extack)
137 {
138 struct net_device *dev = qdisc_dev(sch);
139 struct mqprio_sched *priv = qdisc_priv(sch);
140 struct netdev_queue *dev_queue;
141 struct Qdisc *qdisc;
142 int i, err = -EOPNOTSUPP;
143 struct tc_mqprio_qopt *qopt = NULL;
144 struct nlattr *tb[TCA_MQPRIO_MAX + 1];
145 struct nlattr *attr;
146 int rem;
147 int len;
148
149 BUILD_BUG_ON(TC_MAX_QUEUE != TC_QOPT_MAX_QUEUE);
150 BUILD_BUG_ON(TC_BITMASK != TC_QOPT_BITMASK);
151
152 if (sch->parent != TC_H_ROOT)
153 return -EOPNOTSUPP;
154
155 if (!netif_is_multiqueue(dev))
156 return -EOPNOTSUPP;
157
158 /* make certain can allocate enough classids to handle queues */
159 if (dev->num_tx_queues >= TC_H_MIN_PRIORITY)
160 return -ENOMEM;
161
162 if (!opt || nla_len(opt) < sizeof(*qopt))
163 return -EINVAL;
164
165 qopt = nla_data(opt);
166 if (mqprio_parse_opt(dev, qopt))
167 return -EINVAL;
168
169 len = nla_len(opt) - NLA_ALIGN(sizeof(*qopt));
170 if (len > 0) {
171 err = parse_attr(tb, TCA_MQPRIO_MAX, opt, mqprio_policy,
172 sizeof(*qopt));
173 if (err < 0)
174 return err;
175
176 if (!qopt->hw)
177 return -EINVAL;
178
179 if (tb[TCA_MQPRIO_MODE]) {
180 priv->flags |= TC_MQPRIO_F_MODE;
181 priv->mode = *(u16 *)nla_data(tb[TCA_MQPRIO_MODE]);
182 }
183
184 if (tb[TCA_MQPRIO_SHAPER]) {
185 priv->flags |= TC_MQPRIO_F_SHAPER;
186 priv->shaper = *(u16 *)nla_data(tb[TCA_MQPRIO_SHAPER]);
187 }
188
189 if (tb[TCA_MQPRIO_MIN_RATE64]) {
190 if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE)
191 return -EINVAL;
192 i = 0;
193 nla_for_each_nested(attr, tb[TCA_MQPRIO_MIN_RATE64],
194 rem) {
195 if (nla_type(attr) != TCA_MQPRIO_MIN_RATE64)
196 return -EINVAL;
197 if (i >= qopt->num_tc)
198 break;
199 priv->min_rate[i] = *(u64 *)nla_data(attr);
200 i++;
201 }
202 priv->flags |= TC_MQPRIO_F_MIN_RATE;
203 }
204
205 if (tb[TCA_MQPRIO_MAX_RATE64]) {
206 if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE)
207 return -EINVAL;
208 i = 0;
209 nla_for_each_nested(attr, tb[TCA_MQPRIO_MAX_RATE64],
210 rem) {
211 if (nla_type(attr) != TCA_MQPRIO_MAX_RATE64)
212 return -EINVAL;
213 if (i >= qopt->num_tc)
214 break;
215 priv->max_rate[i] = *(u64 *)nla_data(attr);
216 i++;
217 }
218 priv->flags |= TC_MQPRIO_F_MAX_RATE;
219 }
220 }
221
222 /* pre-allocate qdisc, attachment can't fail */
223 priv->qdiscs = kcalloc(dev->num_tx_queues, sizeof(priv->qdiscs[0]),
224 GFP_KERNEL);
225 if (!priv->qdiscs)
226 return -ENOMEM;
227
228 for (i = 0; i < dev->num_tx_queues; i++) {
229 dev_queue = netdev_get_tx_queue(dev, i);
230 qdisc = qdisc_create_dflt(dev_queue,
231 get_default_qdisc_ops(dev, i),
232 TC_H_MAKE(TC_H_MAJ(sch->handle),
233 TC_H_MIN(i + 1)), extack);
234 if (!qdisc)
235 return -ENOMEM;
236
237 priv->qdiscs[i] = qdisc;
238 qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
239 }
240
241 /* If the mqprio options indicate that hardware should own
242 * the queue mapping then run ndo_setup_tc otherwise use the
243 * supplied and verified mapping
244 */
245 if (qopt->hw) {
246 struct tc_mqprio_qopt_offload mqprio = {.qopt = *qopt};
247
248 switch (priv->mode) {
249 case TC_MQPRIO_MODE_DCB:
250 if (priv->shaper != TC_MQPRIO_SHAPER_DCB)
251 return -EINVAL;
252 break;
253 case TC_MQPRIO_MODE_CHANNEL:
254 mqprio.flags = priv->flags;
255 if (priv->flags & TC_MQPRIO_F_MODE)
256 mqprio.mode = priv->mode;
257 if (priv->flags & TC_MQPRIO_F_SHAPER)
258 mqprio.shaper = priv->shaper;
259 if (priv->flags & TC_MQPRIO_F_MIN_RATE)
260 for (i = 0; i < mqprio.qopt.num_tc; i++)
261 mqprio.min_rate[i] = priv->min_rate[i];
262 if (priv->flags & TC_MQPRIO_F_MAX_RATE)
263 for (i = 0; i < mqprio.qopt.num_tc; i++)
264 mqprio.max_rate[i] = priv->max_rate[i];
265 break;
266 default:
267 return -EINVAL;
268 }
269 err = dev->netdev_ops->ndo_setup_tc(dev,
270 TC_SETUP_QDISC_MQPRIO,
271 &mqprio);
272 if (err)
273 return err;
274
275 priv->hw_offload = mqprio.qopt.hw;
276 } else {
277 netdev_set_num_tc(dev, qopt->num_tc);
278 for (i = 0; i < qopt->num_tc; i++)
279 netdev_set_tc_queue(dev, i,
280 qopt->count[i], qopt->offset[i]);
281 }
282
283 /* Always use supplied priority mappings */
284 for (i = 0; i < TC_BITMASK + 1; i++)
285 netdev_set_prio_tc_map(dev, i, qopt->prio_tc_map[i]);
286
287 sch->flags |= TCQ_F_MQROOT;
288 return 0;
289 }
290
291 static void mqprio_attach(struct Qdisc *sch)
292 {
293 struct net_device *dev = qdisc_dev(sch);
294 struct mqprio_sched *priv = qdisc_priv(sch);
295 struct Qdisc *qdisc, *old;
296 unsigned int ntx;
297
298 /* Attach underlying qdisc */
299 for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
300 qdisc = priv->qdiscs[ntx];
301 old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
302 if (old)
303 qdisc_destroy(old);
304 if (ntx < dev->real_num_tx_queues)
305 qdisc_hash_add(qdisc, false);
306 }
307 kfree(priv->qdiscs);
308 priv->qdiscs = NULL;
309 }
310
311 static struct netdev_queue *mqprio_queue_get(struct Qdisc *sch,
312 unsigned long cl)
313 {
314 struct net_device *dev = qdisc_dev(sch);
315 unsigned long ntx = cl - 1;
316
317 if (ntx >= dev->num_tx_queues)
318 return NULL;
319 return netdev_get_tx_queue(dev, ntx);
320 }
321
322 static int mqprio_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new,
323 struct Qdisc **old, struct netlink_ext_ack *extack)
324 {
325 struct net_device *dev = qdisc_dev(sch);
326 struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
327
328 if (!dev_queue)
329 return -EINVAL;
330
331 if (dev->flags & IFF_UP)
332 dev_deactivate(dev);
333
334 *old = dev_graft_qdisc(dev_queue, new);
335
336 if (new)
337 new->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
338
339 if (dev->flags & IFF_UP)
340 dev_activate(dev);
341
342 return 0;
343 }
344
345 static int dump_rates(struct mqprio_sched *priv,
346 struct tc_mqprio_qopt *opt, struct sk_buff *skb)
347 {
348 struct nlattr *nest;
349 int i;
350
351 if (priv->flags & TC_MQPRIO_F_MIN_RATE) {
352 nest = nla_nest_start(skb, TCA_MQPRIO_MIN_RATE64);
353 if (!nest)
354 goto nla_put_failure;
355
356 for (i = 0; i < opt->num_tc; i++) {
357 if (nla_put(skb, TCA_MQPRIO_MIN_RATE64,
358 sizeof(priv->min_rate[i]),
359 &priv->min_rate[i]))
360 goto nla_put_failure;
361 }
362 nla_nest_end(skb, nest);
363 }
364
365 if (priv->flags & TC_MQPRIO_F_MAX_RATE) {
366 nest = nla_nest_start(skb, TCA_MQPRIO_MAX_RATE64);
367 if (!nest)
368 goto nla_put_failure;
369
370 for (i = 0; i < opt->num_tc; i++) {
371 if (nla_put(skb, TCA_MQPRIO_MAX_RATE64,
372 sizeof(priv->max_rate[i]),
373 &priv->max_rate[i]))
374 goto nla_put_failure;
375 }
376 nla_nest_end(skb, nest);
377 }
378 return 0;
379
380 nla_put_failure:
381 nla_nest_cancel(skb, nest);
382 return -1;
383 }
384
385 static int mqprio_dump(struct Qdisc *sch, struct sk_buff *skb)
386 {
387 struct net_device *dev = qdisc_dev(sch);
388 struct mqprio_sched *priv = qdisc_priv(sch);
389 struct nlattr *nla = (struct nlattr *)skb_tail_pointer(skb);
390 struct tc_mqprio_qopt opt = { 0 };
391 struct Qdisc *qdisc;
392 unsigned int ntx, tc;
393
394 sch->q.qlen = 0;
395 memset(&sch->bstats, 0, sizeof(sch->bstats));
396 memset(&sch->qstats, 0, sizeof(sch->qstats));
397
398 /* MQ supports lockless qdiscs. However, statistics accounting needs
399 * to account for all, none, or a mix of locked and unlocked child
400 * qdiscs. Percpu stats are added to counters in-band and locking
401 * qdisc totals are added at end.
402 */
403 for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
404 qdisc = netdev_get_tx_queue(dev, ntx)->qdisc_sleeping;
405 spin_lock_bh(qdisc_lock(qdisc));
406
407 if (qdisc_is_percpu_stats(qdisc)) {
408 __u32 qlen = qdisc_qlen_sum(qdisc);
409
410 __gnet_stats_copy_basic(NULL, &sch->bstats,
411 qdisc->cpu_bstats,
412 &qdisc->bstats);
413 __gnet_stats_copy_queue(&sch->qstats,
414 qdisc->cpu_qstats,
415 &qdisc->qstats, qlen);
416 sch->q.qlen += qlen;
417 } else {
418 sch->q.qlen += qdisc->q.qlen;
419 sch->bstats.bytes += qdisc->bstats.bytes;
420 sch->bstats.packets += qdisc->bstats.packets;
421 sch->qstats.backlog += qdisc->qstats.backlog;
422 sch->qstats.drops += qdisc->qstats.drops;
423 sch->qstats.requeues += qdisc->qstats.requeues;
424 sch->qstats.overlimits += qdisc->qstats.overlimits;
425 }
426
427 spin_unlock_bh(qdisc_lock(qdisc));
428 }
429
430 opt.num_tc = netdev_get_num_tc(dev);
431 memcpy(opt.prio_tc_map, dev->prio_tc_map, sizeof(opt.prio_tc_map));
432 opt.hw = priv->hw_offload;
433
434 for (tc = 0; tc < netdev_get_num_tc(dev); tc++) {
435 opt.count[tc] = dev->tc_to_txq[tc].count;
436 opt.offset[tc] = dev->tc_to_txq[tc].offset;
437 }
438
439 if (nla_put(skb, TCA_OPTIONS, sizeof(opt), &opt))
440 goto nla_put_failure;
441
442 if ((priv->flags & TC_MQPRIO_F_MODE) &&
443 nla_put_u16(skb, TCA_MQPRIO_MODE, priv->mode))
444 goto nla_put_failure;
445
446 if ((priv->flags & TC_MQPRIO_F_SHAPER) &&
447 nla_put_u16(skb, TCA_MQPRIO_SHAPER, priv->shaper))
448 goto nla_put_failure;
449
450 if ((priv->flags & TC_MQPRIO_F_MIN_RATE ||
451 priv->flags & TC_MQPRIO_F_MAX_RATE) &&
452 (dump_rates(priv, &opt, skb) != 0))
453 goto nla_put_failure;
454
455 return nla_nest_end(skb, nla);
456 nla_put_failure:
457 nlmsg_trim(skb, nla);
458 return -1;
459 }
460
461 static struct Qdisc *mqprio_leaf(struct Qdisc *sch, unsigned long cl)
462 {
463 struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
464
465 if (!dev_queue)
466 return NULL;
467
468 return dev_queue->qdisc_sleeping;
469 }
470
471 static unsigned long mqprio_find(struct Qdisc *sch, u32 classid)
472 {
473 struct net_device *dev = qdisc_dev(sch);
474 unsigned int ntx = TC_H_MIN(classid);
475
476 /* There are essentially two regions here that have valid classid
477 * values. The first region will have a classid value of 1 through
478 * num_tx_queues. All of these are backed by actual Qdiscs.
479 */
480 if (ntx < TC_H_MIN_PRIORITY)
481 return (ntx <= dev->num_tx_queues) ? ntx : 0;
482
483 /* The second region represents the hardware traffic classes. These
484 * are represented by classid values of TC_H_MIN_PRIORITY through
485 * TC_H_MIN_PRIORITY + netdev_get_num_tc - 1
486 */
487 return ((ntx - TC_H_MIN_PRIORITY) < netdev_get_num_tc(dev)) ? ntx : 0;
488 }
489
490 static int mqprio_dump_class(struct Qdisc *sch, unsigned long cl,
491 struct sk_buff *skb, struct tcmsg *tcm)
492 {
493 if (cl < TC_H_MIN_PRIORITY) {
494 struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
495 struct net_device *dev = qdisc_dev(sch);
496 int tc = netdev_txq_to_tc(dev, cl - 1);
497
498 tcm->tcm_parent = (tc < 0) ? 0 :
499 TC_H_MAKE(TC_H_MAJ(sch->handle),
500 TC_H_MIN(tc + TC_H_MIN_PRIORITY));
501 tcm->tcm_info = dev_queue->qdisc_sleeping->handle;
502 } else {
503 tcm->tcm_parent = TC_H_ROOT;
504 tcm->tcm_info = 0;
505 }
506 tcm->tcm_handle |= TC_H_MIN(cl);
507 return 0;
508 }
509
510 static int mqprio_dump_class_stats(struct Qdisc *sch, unsigned long cl,
511 struct gnet_dump *d)
512 __releases(d->lock)
513 __acquires(d->lock)
514 {
515 if (cl >= TC_H_MIN_PRIORITY) {
516 int i;
517 __u32 qlen = 0;
518 struct gnet_stats_queue qstats = {0};
519 struct gnet_stats_basic_packed bstats = {0};
520 struct net_device *dev = qdisc_dev(sch);
521 struct netdev_tc_txq tc = dev->tc_to_txq[cl & TC_BITMASK];
522
523 /* Drop lock here it will be reclaimed before touching
524 * statistics this is required because the d->lock we
525 * hold here is the look on dev_queue->qdisc_sleeping
526 * also acquired below.
527 */
528 if (d->lock)
529 spin_unlock_bh(d->lock);
530
531 for (i = tc.offset; i < tc.offset + tc.count; i++) {
532 struct netdev_queue *q = netdev_get_tx_queue(dev, i);
533 struct Qdisc *qdisc = rtnl_dereference(q->qdisc);
534 struct gnet_stats_basic_cpu __percpu *cpu_bstats = NULL;
535 struct gnet_stats_queue __percpu *cpu_qstats = NULL;
536
537 spin_lock_bh(qdisc_lock(qdisc));
538 if (qdisc_is_percpu_stats(qdisc)) {
539 cpu_bstats = qdisc->cpu_bstats;
540 cpu_qstats = qdisc->cpu_qstats;
541 }
542
543 qlen = qdisc_qlen_sum(qdisc);
544 __gnet_stats_copy_basic(NULL, &sch->bstats,
545 cpu_bstats, &qdisc->bstats);
546 __gnet_stats_copy_queue(&sch->qstats,
547 cpu_qstats,
548 &qdisc->qstats,
549 qlen);
550 spin_unlock_bh(qdisc_lock(qdisc));
551 }
552
553 /* Reclaim root sleeping lock before completing stats */
554 if (d->lock)
555 spin_lock_bh(d->lock);
556 if (gnet_stats_copy_basic(NULL, d, NULL, &bstats) < 0 ||
557 gnet_stats_copy_queue(d, NULL, &qstats, qlen) < 0)
558 return -1;
559 } else {
560 struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
561
562 sch = dev_queue->qdisc_sleeping;
563 if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch), d,
564 sch->cpu_bstats, &sch->bstats) < 0 ||
565 gnet_stats_copy_queue(d, NULL,
566 &sch->qstats, sch->q.qlen) < 0)
567 return -1;
568 }
569 return 0;
570 }
571
572 static void mqprio_walk(struct Qdisc *sch, struct qdisc_walker *arg)
573 {
574 struct net_device *dev = qdisc_dev(sch);
575 unsigned long ntx;
576
577 if (arg->stop)
578 return;
579
580 /* Walk hierarchy with a virtual class per tc */
581 arg->count = arg->skip;
582 for (ntx = arg->skip; ntx < netdev_get_num_tc(dev); ntx++) {
583 if (arg->fn(sch, ntx + TC_H_MIN_PRIORITY, arg) < 0) {
584 arg->stop = 1;
585 return;
586 }
587 arg->count++;
588 }
589
590 /* Pad the values and skip over unused traffic classes */
591 if (ntx < TC_MAX_QUEUE) {
592 arg->count = TC_MAX_QUEUE;
593 ntx = TC_MAX_QUEUE;
594 }
595
596 /* Reset offset, sort out remaining per-queue qdiscs */
597 for (ntx -= TC_MAX_QUEUE; ntx < dev->num_tx_queues; ntx++) {
598 if (arg->fn(sch, ntx + 1, arg) < 0) {
599 arg->stop = 1;
600 return;
601 }
602 arg->count++;
603 }
604 }
605
606 static struct netdev_queue *mqprio_select_queue(struct Qdisc *sch,
607 struct tcmsg *tcm)
608 {
609 return mqprio_queue_get(sch, TC_H_MIN(tcm->tcm_parent));
610 }
611
612 static const struct Qdisc_class_ops mqprio_class_ops = {
613 .graft = mqprio_graft,
614 .leaf = mqprio_leaf,
615 .find = mqprio_find,
616 .walk = mqprio_walk,
617 .dump = mqprio_dump_class,
618 .dump_stats = mqprio_dump_class_stats,
619 .select_queue = mqprio_select_queue,
620 };
621
622 static struct Qdisc_ops mqprio_qdisc_ops __read_mostly = {
623 .cl_ops = &mqprio_class_ops,
624 .id = "mqprio",
625 .priv_size = sizeof(struct mqprio_sched),
626 .init = mqprio_init,
627 .destroy = mqprio_destroy,
628 .attach = mqprio_attach,
629 .dump = mqprio_dump,
630 .owner = THIS_MODULE,
631 };
632
633 static int __init mqprio_module_init(void)
634 {
635 return register_qdisc(&mqprio_qdisc_ops);
636 }
637
638 static void __exit mqprio_module_exit(void)
639 {
640 unregister_qdisc(&mqprio_qdisc_ops);
641 }
642
643 module_init(mqprio_module_init);
644 module_exit(mqprio_module_exit);
645
646 MODULE_LICENSE("GPL");
Linux with added FPC-III support