summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_mqprio.c
blob: 8971dddcdb7a835afe48020079a89524d2d5e746 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2019 Chelsio Communications.  All rights reserved. */

#include "cxgb4.h"
#include "cxgb4_tc_mqprio.h"
#include "sched.h"

static int cxgb4_mqprio_validate(struct net_device *dev,
				 struct tc_mqprio_qopt_offload *mqprio)
{
	u64 min_rate = 0, max_rate = 0, max_link_rate;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	u32 speed, qcount = 0, qoffset = 0;
	int ret;
	u8 i;

	if (!mqprio->qopt.num_tc)
		return 0;

	if (mqprio->qopt.hw != TC_MQPRIO_HW_OFFLOAD_TCS) {
		netdev_err(dev, "Only full TC hardware offload is supported\n");
		return -EINVAL;
	} else if (mqprio->mode != TC_MQPRIO_MODE_CHANNEL) {
		netdev_err(dev, "Only channel mode offload is supported\n");
		return -EINVAL;
	} else if (mqprio->shaper != TC_MQPRIO_SHAPER_BW_RATE) {
		netdev_err(dev,	"Only bandwidth rate shaper supported\n");
		return -EINVAL;
	} else if (mqprio->qopt.num_tc > adap->params.nsched_cls) {
		netdev_err(dev,
			   "Only %u traffic classes supported by hardware\n",
			   adap->params.nsched_cls);
		return -ERANGE;
	}

	ret = t4_get_link_params(pi, NULL, &speed, NULL);
	if (ret) {
		netdev_err(dev, "Failed to get link speed, ret: %d\n", ret);
		return -EINVAL;
	}

	/* Convert from Mbps to bps */
	max_link_rate = (u64)speed * 1000 * 1000;

	for (i = 0; i < mqprio->qopt.num_tc; i++) {
		qoffset = max_t(u16, mqprio->qopt.offset[i], qoffset);
		qcount += mqprio->qopt.count[i];

		/* Convert byte per second to bits per second */
		min_rate += (mqprio->min_rate[i] * 8);
		max_rate += (mqprio->max_rate[i] * 8);
	}

	if (qoffset >= adap->tids.neotids || qcount > adap->tids.neotids)
		return -ENOMEM;

	if (min_rate > max_link_rate || max_rate > max_link_rate) {
		netdev_err(dev,
			   "Total Min/Max (%llu/%llu) Rate > supported (%llu)\n",
			   min_rate, max_rate, max_link_rate);
		return -EINVAL;
	}

	return 0;
}

static int cxgb4_init_eosw_txq(struct net_device *dev,
			       struct sge_eosw_txq *eosw_txq,
			       u32 eotid, u32 hwqid)
{
	struct adapter *adap = netdev2adap(dev);
	struct tx_sw_desc *ring;

	memset(eosw_txq, 0, sizeof(*eosw_txq));

	ring = kcalloc(CXGB4_EOSW_TXQ_DEFAULT_DESC_NUM,
		       sizeof(*ring), GFP_KERNEL);
	if (!ring)
		return -ENOMEM;

	eosw_txq->desc = ring;
	eosw_txq->ndesc = CXGB4_EOSW_TXQ_DEFAULT_DESC_NUM;
	spin_lock_init(&eosw_txq->lock);
	eosw_txq->state = CXGB4_EO_STATE_CLOSED;
	eosw_txq->eotid = eotid;
	eosw_txq->hwtid = adap->tids.eotid_base + eosw_txq->eotid;
	eosw_txq->cred = adap->params.ofldq_wr_cred;
	eosw_txq->hwqid = hwqid;
	eosw_txq->netdev = dev;
	tasklet_init(&eosw_txq->qresume_tsk, cxgb4_ethofld_restart,
		     (unsigned long)eosw_txq);
	return 0;
}

static void cxgb4_clean_eosw_txq(struct net_device *dev,
				 struct sge_eosw_txq *eosw_txq)
{
	struct adapter *adap = netdev2adap(dev);

	cxgb4_eosw_txq_free_desc(adap, eosw_txq, eosw_txq->ndesc);
	eosw_txq->pidx = 0;
	eosw_txq->last_pidx = 0;
	eosw_txq->cidx = 0;
	eosw_txq->last_cidx = 0;
	eosw_txq->flowc_idx = 0;
	eosw_txq->inuse = 0;
	eosw_txq->cred = adap->params.ofldq_wr_cred;
	eosw_txq->ncompl = 0;
	eosw_txq->last_compl = 0;
	eosw_txq->state = CXGB4_EO_STATE_CLOSED;
}

static void cxgb4_free_eosw_txq(struct net_device *dev,
				struct sge_eosw_txq *eosw_txq)
{
	spin_lock_bh(&eosw_txq->lock);
	cxgb4_clean_eosw_txq(dev, eosw_txq);
	kfree(eosw_txq->desc);
	spin_unlock_bh(&eosw_txq->lock);
	tasklet_kill(&eosw_txq->qresume_tsk);
}

static int cxgb4_mqprio_alloc_hw_resources(struct net_device *dev)
{
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	struct sge_ofld_rxq *eorxq;
	struct sge_eohw_txq *eotxq;
	int ret, msix = 0;
	u32 i;

	/* Allocate ETHOFLD hardware queue structures if not done already */
	if (!refcount_read(&adap->tc_mqprio->refcnt)) {
		adap->sge.eohw_rxq = kcalloc(adap->sge.eoqsets,
					     sizeof(struct sge_ofld_rxq),
					     GFP_KERNEL);
		if (!adap->sge.eohw_rxq)
			return -ENOMEM;

		adap->sge.eohw_txq = kcalloc(adap->sge.eoqsets,
					     sizeof(struct sge_eohw_txq),
					     GFP_KERNEL);
		if (!adap->sge.eohw_txq) {
			kfree(adap->sge.eohw_rxq);
			return -ENOMEM;
		}

		refcount_set(&adap->tc_mqprio->refcnt, 1);
	} else {
		refcount_inc(&adap->tc_mqprio->refcnt);
	}

	if (!(adap->flags & CXGB4_USING_MSIX))
		msix = -((int)adap->sge.intrq.abs_id + 1);

	for (i = 0; i < pi->nqsets; i++) {
		eorxq = &adap->sge.eohw_rxq[pi->first_qset + i];
		eotxq = &adap->sge.eohw_txq[pi->first_qset + i];

		/* Allocate Rxqs for receiving ETHOFLD Tx completions */
		if (msix >= 0) {
			msix = cxgb4_get_msix_idx_from_bmap(adap);
			if (msix < 0) {
				ret = msix;
				goto out_free_queues;
			}

			eorxq->msix = &adap->msix_info[msix];
			snprintf(eorxq->msix->desc,
				 sizeof(eorxq->msix->desc),
				 "%s-eorxq%d", dev->name, i);
		}

		init_rspq(adap, &eorxq->rspq,
			  CXGB4_EOHW_RXQ_DEFAULT_INTR_USEC,
			  CXGB4_EOHW_RXQ_DEFAULT_PKT_CNT,
			  CXGB4_EOHW_RXQ_DEFAULT_DESC_NUM,
			  CXGB4_EOHW_RXQ_DEFAULT_DESC_SIZE);

		eorxq->fl.size = CXGB4_EOHW_FLQ_DEFAULT_DESC_NUM;

		ret = t4_sge_alloc_rxq(adap, &eorxq->rspq, false,
				       dev, msix, &eorxq->fl,
				       cxgb4_ethofld_rx_handler,
				       NULL, 0);
		if (ret)
			goto out_free_queues;

		/* Allocate ETHOFLD hardware Txqs */
		eotxq->q.size = CXGB4_EOHW_TXQ_DEFAULT_DESC_NUM;
		ret = t4_sge_alloc_ethofld_txq(adap, eotxq, dev,
					       eorxq->rspq.cntxt_id);
		if (ret)
			goto out_free_queues;

		/* Allocate IRQs, set IRQ affinity, and start Rx */
		if (adap->flags & CXGB4_USING_MSIX) {
			ret = request_irq(eorxq->msix->vec, t4_sge_intr_msix, 0,
					  eorxq->msix->desc, &eorxq->rspq);
			if (ret)
				goto out_free_msix;

			cxgb4_set_msix_aff(adap, eorxq->msix->vec,
					   &eorxq->msix->aff_mask, i);
		}

		if (adap->flags & CXGB4_FULL_INIT_DONE)
			cxgb4_enable_rx(adap, &eorxq->rspq);
	}

	return 0;

out_free_msix:
	while (i-- > 0) {
		eorxq = &adap->sge.eohw_rxq[pi->first_qset + i];

		if (adap->flags & CXGB4_FULL_INIT_DONE)
			cxgb4_quiesce_rx(&eorxq->rspq);

		if (adap->flags & CXGB4_USING_MSIX) {
			cxgb4_clear_msix_aff(eorxq->msix->vec,
					     eorxq->msix->aff_mask);
			free_irq(eorxq->msix->vec, &eorxq->rspq);
		}
	}

out_free_queues:
	for (i = 0; i < pi->nqsets; i++) {
		eorxq = &adap->sge.eohw_rxq[pi->first_qset + i];
		eotxq = &adap->sge.eohw_txq[pi->first_qset + i];

		if (eorxq->rspq.desc)
			free_rspq_fl(adap, &eorxq->rspq, &eorxq->fl);
		if (eorxq->msix)
			cxgb4_free_msix_idx_in_bmap(adap, eorxq->msix->idx);
		t4_sge_free_ethofld_txq(adap, eotxq);
	}

	if (refcount_dec_and_test(&adap->tc_mqprio->refcnt)) {
		kfree(adap->sge.eohw_txq);
		kfree(adap->sge.eohw_rxq);
	}
	return ret;
}

static void cxgb4_mqprio_free_hw_resources(struct net_device *dev)
{
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	struct sge_ofld_rxq *eorxq;
	struct sge_eohw_txq *eotxq;
	u32 i;

	/* Return if no ETHOFLD structures have been allocated yet */
	if (!refcount_read(&adap->tc_mqprio->refcnt))
		return;

	/* Return if no hardware queues have been allocated */
	if (!adap->sge.eohw_rxq[pi->first_qset].rspq.desc)
		return;

	for (i = 0; i < pi->nqsets; i++) {
		eorxq = &adap->sge.eohw_rxq[pi->first_qset + i];
		eotxq = &adap->sge.eohw_txq[pi->first_qset + i];

		/* Device removal path will already disable NAPI
		 * before unregistering netdevice. So, only disable
		 * NAPI if we're not in device removal path
		 */
		if (!(adap->flags & CXGB4_SHUTTING_DOWN))
			cxgb4_quiesce_rx(&eorxq->rspq);

		if (adap->flags & CXGB4_USING_MSIX) {
			cxgb4_clear_msix_aff(eorxq->msix->vec,
					     eorxq->msix->aff_mask);
			free_irq(eorxq->msix->vec, &eorxq->rspq);
		}

		free_rspq_fl(adap, &eorxq->rspq, &eorxq->fl);
		t4_sge_free_ethofld_txq(adap, eotxq);
	}

	/* Free up ETHOFLD structures if there are no users */
	if (refcount_dec_and_test(&adap->tc_mqprio->refcnt)) {
		kfree(adap->sge.eohw_txq);
		kfree(adap->sge.eohw_rxq);
	}
}

static int cxgb4_mqprio_alloc_tc(struct net_device *dev,
				 struct tc_mqprio_qopt_offload *mqprio)
{
	struct ch_sched_params p = {
		.type = SCHED_CLASS_TYPE_PACKET,
		.u.params.level = SCHED_CLASS_LEVEL_CL_RL,
		.u.params.mode = SCHED_CLASS_MODE_FLOW,
		.u.params.rateunit = SCHED_CLASS_RATEUNIT_BITS,
		.u.params.ratemode = SCHED_CLASS_RATEMODE_ABS,
		.u.params.class = SCHED_CLS_NONE,
		.u.params.weight = 0,
		.u.params.pktsize = dev->mtu,
	};
	struct cxgb4_tc_port_mqprio *tc_port_mqprio;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	struct sched_class *e;
	int ret;
	u8 i;

	tc_port_mqprio = &adap->tc_mqprio->port_mqprio[pi->port_id];
	p.u.params.channel = pi->tx_chan;
	for (i = 0; i < mqprio->qopt.num_tc; i++) {
		/* Convert from bytes per second to Kbps */
		p.u.params.minrate = div_u64(mqprio->min_rate[i] * 8, 1000);
		p.u.params.maxrate = div_u64(mqprio->max_rate[i] * 8, 1000);

		e = cxgb4_sched_class_alloc(dev, &p);
		if (!e) {
			ret = -ENOMEM;
			goto out_err;
		}

		tc_port_mqprio->tc_hwtc_map[i] = e->idx;
	}

	return 0;

out_err:
	while (i--)
		cxgb4_sched_class_free(dev, tc_port_mqprio->tc_hwtc_map[i]);

	return ret;
}

static void cxgb4_mqprio_free_tc(struct net_device *dev)
{
	struct cxgb4_tc_port_mqprio *tc_port_mqprio;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	u8 i;

	tc_port_mqprio = &adap->tc_mqprio->port_mqprio[pi->port_id];
	for (i = 0; i < tc_port_mqprio->mqprio.qopt.num_tc; i++)
		cxgb4_sched_class_free(dev, tc_port_mqprio->tc_hwtc_map[i]);
}

static int cxgb4_mqprio_class_bind(struct net_device *dev,
				   struct sge_eosw_txq *eosw_txq,
				   u8 tc)
{
	struct ch_sched_flowc fe;
	int ret;

	init_completion(&eosw_txq->completion);

	fe.tid = eosw_txq->eotid;
	fe.class = tc;

	ret = cxgb4_sched_class_bind(dev, &fe, SCHED_FLOWC);
	if (ret)
		return ret;

	ret = wait_for_completion_timeout(&eosw_txq->completion,
					  CXGB4_FLOWC_WAIT_TIMEOUT);
	if (!ret)
		return -ETIMEDOUT;

	return 0;
}

static void cxgb4_mqprio_class_unbind(struct net_device *dev,
				      struct sge_eosw_txq *eosw_txq,
				      u8 tc)
{
	struct adapter *adap = netdev2adap(dev);
	struct ch_sched_flowc fe;

	/* If we're shutting down, interrupts are disabled and no completions
	 * come back. So, skip waiting for completions in this scenario.
	 */
	if (!(adap->flags & CXGB4_SHUTTING_DOWN))
		init_completion(&eosw_txq->completion);

	fe.tid = eosw_txq->eotid;
	fe.class = tc;
	cxgb4_sched_class_unbind(dev, &fe, SCHED_FLOWC);

	if (!(adap->flags & CXGB4_SHUTTING_DOWN))
		wait_for_completion_timeout(&eosw_txq->completion,
					    CXGB4_FLOWC_WAIT_TIMEOUT);
}

static int cxgb4_mqprio_enable_offload(struct net_device *dev,
				       struct tc_mqprio_qopt_offload *mqprio)
{
	struct cxgb4_tc_port_mqprio *tc_port_mqprio;
	u32 qoffset, qcount, tot_qcount, qid, hwqid;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	struct sge_eosw_txq *eosw_txq;
	int eotid, ret;
	u16 i, j;
	u8 hwtc;

	ret = cxgb4_mqprio_alloc_hw_resources(dev);
	if (ret)
		return -ENOMEM;

	tc_port_mqprio = &adap->tc_mqprio->port_mqprio[pi->port_id];
	for (i = 0; i < mqprio->qopt.num_tc; i++) {
		qoffset = mqprio->qopt.offset[i];
		qcount = mqprio->qopt.count[i];
		for (j = 0; j < qcount; j++) {
			eotid = cxgb4_get_free_eotid(&adap->tids);
			if (eotid < 0) {
				ret = -ENOMEM;
				goto out_free_eotids;
			}

			qid = qoffset + j;
			hwqid = pi->first_qset + (eotid % pi->nqsets);
			eosw_txq = &tc_port_mqprio->eosw_txq[qid];
			ret = cxgb4_init_eosw_txq(dev, eosw_txq,
						  eotid, hwqid);
			if (ret)
				goto out_free_eotids;

			cxgb4_alloc_eotid(&adap->tids, eotid, eosw_txq);

			hwtc = tc_port_mqprio->tc_hwtc_map[i];
			ret = cxgb4_mqprio_class_bind(dev, eosw_txq, hwtc);
			if (ret)
				goto out_free_eotids;
		}
	}

	memcpy(&tc_port_mqprio->mqprio, mqprio,
	       sizeof(struct tc_mqprio_qopt_offload));

	/* Inform the stack about the configured tc params.
	 *
	 * Set the correct queue map. If no queue count has been
	 * specified, then send the traffic through default NIC
	 * queues; instead of ETHOFLD queues.
	 */
	ret = netdev_set_num_tc(dev, mqprio->qopt.num_tc);
	if (ret)
		goto out_free_eotids;

	tot_qcount = pi->nqsets;
	for (i = 0; i < mqprio->qopt.num_tc; i++) {
		qcount = mqprio->qopt.count[i];
		if (qcount) {
			qoffset = mqprio->qopt.offset[i] + pi->nqsets;
		} else {
			qcount = pi->nqsets;
			qoffset = 0;
		}

		ret = netdev_set_tc_queue(dev, i, qcount, qoffset);
		if (ret)
			goto out_reset_tc;

		tot_qcount += mqprio->qopt.count[i];
	}

	ret = netif_set_real_num_tx_queues(dev, tot_qcount);
	if (ret)
		goto out_reset_tc;

	tc_port_mqprio->state = CXGB4_MQPRIO_STATE_ACTIVE;
	return 0;

out_reset_tc:
	netdev_reset_tc(dev);
	i = mqprio->qopt.num_tc;

out_free_eotids:
	while (i-- > 0) {
		qoffset = mqprio->qopt.offset[i];
		qcount = mqprio->qopt.count[i];
		for (j = 0; j < qcount; j++) {
			eosw_txq = &tc_port_mqprio->eosw_txq[qoffset + j];

			hwtc = tc_port_mqprio->tc_hwtc_map[i];
			cxgb4_mqprio_class_unbind(dev, eosw_txq, hwtc);

			cxgb4_free_eotid(&adap->tids, eosw_txq->eotid);
			cxgb4_free_eosw_txq(dev, eosw_txq);
		}
	}

	cxgb4_mqprio_free_hw_resources(dev);
	return ret;
}

static void cxgb4_mqprio_disable_offload(struct net_device *dev)
{
	struct cxgb4_tc_port_mqprio *tc_port_mqprio;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	struct sge_eosw_txq *eosw_txq;
	u32 qoffset, qcount;
	u16 i, j;
	u8 hwtc;

	tc_port_mqprio = &adap->tc_mqprio->port_mqprio[pi->port_id];
	if (tc_port_mqprio->state != CXGB4_MQPRIO_STATE_ACTIVE)
		return;

	netdev_reset_tc(dev);
	netif_set_real_num_tx_queues(dev, pi->nqsets);

	for (i = 0; i < tc_port_mqprio->mqprio.qopt.num_tc; i++) {
		qoffset = tc_port_mqprio->mqprio.qopt.offset[i];
		qcount = tc_port_mqprio->mqprio.qopt.count[i];
		for (j = 0; j < qcount; j++) {
			eosw_txq = &tc_port_mqprio->eosw_txq[qoffset + j];

			hwtc = tc_port_mqprio->tc_hwtc_map[i];
			cxgb4_mqprio_class_unbind(dev, eosw_txq, hwtc);

			cxgb4_free_eotid(&adap->tids, eosw_txq->eotid);
			cxgb4_free_eosw_txq(dev, eosw_txq);
		}
	}

	cxgb4_mqprio_free_hw_resources(dev);

	/* Free up the traffic classes */
	cxgb4_mqprio_free_tc(dev);

	memset(&tc_port_mqprio->mqprio, 0,
	       sizeof(struct tc_mqprio_qopt_offload));

	tc_port_mqprio->state = CXGB4_MQPRIO_STATE_DISABLED;
}

int cxgb4_setup_tc_mqprio(struct net_device *dev,
			  struct tc_mqprio_qopt_offload *mqprio)
{
	bool needs_bring_up = false;
	int ret;

	ret = cxgb4_mqprio_validate(dev, mqprio);
	if (ret)
		return ret;

	/* To configure tc params, the current allocated EOTIDs must
	 * be freed up. However, they can't be freed up if there's
	 * traffic running on the interface. So, ensure interface is
	 * down before configuring tc params.
	 */
	if (netif_running(dev)) {
		cxgb_close(dev);
		needs_bring_up = true;
	}

	cxgb4_mqprio_disable_offload(dev);

	/* If requested for clear, then just return since resources are
	 * already freed up by now.
	 */
	if (!mqprio->qopt.num_tc)
		goto out;

	/* Allocate free available traffic classes and configure
	 * their rate parameters.
	 */
	ret = cxgb4_mqprio_alloc_tc(dev, mqprio);
	if (ret)
		goto out;

	ret = cxgb4_mqprio_enable_offload(dev, mqprio);
	if (ret) {
		cxgb4_mqprio_free_tc(dev);
		goto out;
	}

out:
	if (needs_bring_up)
		cxgb_open(dev);

	return ret;
}

int cxgb4_init_tc_mqprio(struct adapter *adap)
{
	struct cxgb4_tc_port_mqprio *tc_port_mqprio, *port_mqprio;
	struct cxgb4_tc_mqprio *tc_mqprio;
	struct sge_eosw_txq *eosw_txq;
	int ret = 0;
	u8 i;

	tc_mqprio = kzalloc(sizeof(*tc_mqprio), GFP_KERNEL);
	if (!tc_mqprio)
		return -ENOMEM;

	tc_port_mqprio = kcalloc(adap->params.nports, sizeof(*tc_port_mqprio),
				 GFP_KERNEL);
	if (!tc_port_mqprio) {
		ret = -ENOMEM;
		goto out_free_mqprio;
	}

	tc_mqprio->port_mqprio = tc_port_mqprio;
	for (i = 0; i < adap->params.nports; i++) {
		port_mqprio = &tc_mqprio->port_mqprio[i];
		eosw_txq = kcalloc(adap->tids.neotids, sizeof(*eosw_txq),
				   GFP_KERNEL);
		if (!eosw_txq) {
			ret = -ENOMEM;
			goto out_free_ports;
		}
		port_mqprio->eosw_txq = eosw_txq;
	}

	adap->tc_mqprio = tc_mqprio;
	refcount_set(&adap->tc_mqprio->refcnt, 0);
	return 0;

out_free_ports:
	for (i = 0; i < adap->params.nports; i++) {
		port_mqprio = &tc_mqprio->port_mqprio[i];
		kfree(port_mqprio->eosw_txq);
	}
	kfree(tc_port_mqprio);

out_free_mqprio:
	kfree(tc_mqprio);
	return ret;
}

void cxgb4_cleanup_tc_mqprio(struct adapter *adap)
{
	struct cxgb4_tc_port_mqprio *port_mqprio;
	u8 i;

	if (adap->tc_mqprio) {
		if (adap->tc_mqprio->port_mqprio) {
			for (i = 0; i < adap->params.nports; i++) {
				struct net_device *dev = adap->port[i];

				if (dev)
					cxgb4_mqprio_disable_offload(dev);
				port_mqprio = &adap->tc_mqprio->port_mqprio[i];
				kfree(port_mqprio->eosw_txq);
			}
			kfree(adap->tc_mqprio->port_mqprio);
		}
		kfree(adap->tc_mqprio);
	}
}