summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
blob: 2e309f6673f7b9231507f37886561902bc2cfa96 (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
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2019 Chelsio Communications.  All rights reserved. */

#include "cxgb4.h"
#include "cxgb4_tc_matchall.h"
#include "sched.h"
#include "cxgb4_uld.h"
#include "cxgb4_filter.h"
#include "cxgb4_tc_flower.h"

static int cxgb4_matchall_egress_validate(struct net_device *dev,
					  struct tc_cls_matchall_offload *cls)
{
	struct netlink_ext_ack *extack = cls->common.extack;
	struct flow_action *actions = &cls->rule->action;
	struct port_info *pi = netdev2pinfo(dev);
	struct flow_action_entry *entry;
	struct ch_sched_queue qe;
	struct sched_class *e;
	u64 max_link_rate;
	u32 i, speed;
	int ret;

	if (!flow_action_has_entries(actions)) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Egress MATCHALL offload needs at least 1 policing action");
		return -EINVAL;
	} else if (!flow_offload_has_one_action(actions)) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Egress MATCHALL offload only supports 1 policing action");
		return -EINVAL;
	} else if (pi->tc_block_shared) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Egress MATCHALL offload not supported with shared blocks");
		return -EINVAL;
	}

	ret = t4_get_link_params(pi, NULL, &speed, NULL);
	if (ret) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Failed to get max speed supported by the link");
		return -EINVAL;
	}

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

	flow_action_for_each(i, entry, actions) {
		switch (entry->id) {
		case FLOW_ACTION_POLICE:
			/* Convert bytes per second to bits per second */
			if (entry->police.rate_bytes_ps * 8 > max_link_rate) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Specified policing max rate is larger than underlying link speed");
				return -ERANGE;
			}
			break;
		default:
			NL_SET_ERR_MSG_MOD(extack,
					   "Only policing action supported with Egress MATCHALL offload");
			return -EOPNOTSUPP;
		}
	}

	for (i = 0; i < pi->nqsets; i++) {
		memset(&qe, 0, sizeof(qe));
		qe.queue = i;

		e = cxgb4_sched_queue_lookup(dev, &qe);
		if (e && e->info.u.params.level != SCHED_CLASS_LEVEL_CH_RL) {
			NL_SET_ERR_MSG_MOD(extack,
					   "Some queues are already bound to different class");
			return -EBUSY;
		}
	}

	return 0;
}

static int cxgb4_matchall_tc_bind_queues(struct net_device *dev, u32 tc)
{
	struct port_info *pi = netdev2pinfo(dev);
	struct ch_sched_queue qe;
	int ret;
	u32 i;

	for (i = 0; i < pi->nqsets; i++) {
		qe.queue = i;
		qe.class = tc;
		ret = cxgb4_sched_class_bind(dev, &qe, SCHED_QUEUE);
		if (ret)
			goto out_free;
	}

	return 0;

out_free:
	while (i--) {
		qe.queue = i;
		qe.class = SCHED_CLS_NONE;
		cxgb4_sched_class_unbind(dev, &qe, SCHED_QUEUE);
	}

	return ret;
}

static void cxgb4_matchall_tc_unbind_queues(struct net_device *dev)
{
	struct port_info *pi = netdev2pinfo(dev);
	struct ch_sched_queue qe;
	u32 i;

	for (i = 0; i < pi->nqsets; i++) {
		qe.queue = i;
		qe.class = SCHED_CLS_NONE;
		cxgb4_sched_class_unbind(dev, &qe, SCHED_QUEUE);
	}
}

static int cxgb4_matchall_alloc_tc(struct net_device *dev,
				   struct tc_cls_matchall_offload *cls)
{
	struct ch_sched_params p = {
		.type = SCHED_CLASS_TYPE_PACKET,
		.u.params.level = SCHED_CLASS_LEVEL_CH_RL,
		.u.params.mode = SCHED_CLASS_MODE_CLASS,
		.u.params.rateunit = SCHED_CLASS_RATEUNIT_BITS,
		.u.params.ratemode = SCHED_CLASS_RATEMODE_ABS,
		.u.params.class = SCHED_CLS_NONE,
		.u.params.minrate = 0,
		.u.params.weight = 0,
		.u.params.pktsize = dev->mtu,
	};
	struct netlink_ext_ack *extack = cls->common.extack;
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	struct flow_action_entry *entry;
	struct sched_class *e;
	int ret;
	u32 i;

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];

	flow_action_for_each(i, entry, &cls->rule->action)
		if (entry->id == FLOW_ACTION_POLICE)
			break;

	/* Convert from bytes per second to Kbps */
	p.u.params.maxrate = div_u64(entry->police.rate_bytes_ps * 8, 1000);
	p.u.params.channel = pi->tx_chan;
	e = cxgb4_sched_class_alloc(dev, &p);
	if (!e) {
		NL_SET_ERR_MSG_MOD(extack,
				   "No free traffic class available for policing action");
		return -ENOMEM;
	}

	ret = cxgb4_matchall_tc_bind_queues(dev, e->idx);
	if (ret) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Could not bind queues to traffic class");
		goto out_free;
	}

	tc_port_matchall->egress.hwtc = e->idx;
	tc_port_matchall->egress.cookie = cls->cookie;
	tc_port_matchall->egress.state = CXGB4_MATCHALL_STATE_ENABLED;
	return 0;

out_free:
	cxgb4_sched_class_free(dev, e->idx);
	return ret;
}

static void cxgb4_matchall_free_tc(struct net_device *dev)
{
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	cxgb4_matchall_tc_unbind_queues(dev);
	cxgb4_sched_class_free(dev, tc_port_matchall->egress.hwtc);

	tc_port_matchall->egress.hwtc = SCHED_CLS_NONE;
	tc_port_matchall->egress.cookie = 0;
	tc_port_matchall->egress.state = CXGB4_MATCHALL_STATE_DISABLED;
}

static int cxgb4_matchall_mirror_alloc(struct net_device *dev,
				       struct tc_cls_matchall_offload *cls)
{
	struct netlink_ext_ack *extack = cls->common.extack;
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	struct flow_action_entry *act;
	int ret;
	u32 i;

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	flow_action_for_each(i, act, &cls->rule->action) {
		if (act->id == FLOW_ACTION_MIRRED) {
			ret = cxgb4_port_mirror_alloc(dev);
			if (ret) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Couldn't allocate mirror");
				return ret;
			}

			tc_port_matchall->ingress.viid_mirror = pi->viid_mirror;
			break;
		}
	}

	return 0;
}

static void cxgb4_matchall_mirror_free(struct net_device *dev)
{
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	if (!tc_port_matchall->ingress.viid_mirror)
		return;

	cxgb4_port_mirror_free(dev);
	tc_port_matchall->ingress.viid_mirror = 0;
}

static int cxgb4_matchall_del_filter(struct net_device *dev, u8 filter_type)
{
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	int ret;

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	ret = cxgb4_del_filter(dev, tc_port_matchall->ingress.tid[filter_type],
			       &tc_port_matchall->ingress.fs[filter_type]);
	if (ret)
		return ret;

	tc_port_matchall->ingress.tid[filter_type] = 0;
	return 0;
}

static int cxgb4_matchall_add_filter(struct net_device *dev,
				     struct tc_cls_matchall_offload *cls,
				     u8 filter_type)
{
	struct netlink_ext_ack *extack = cls->common.extack;
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	struct ch_filter_specification *fs;
	int ret, fidx;

	/* Get a free filter entry TID, where we can insert this new
	 * rule. Only insert rule if its prio doesn't conflict with
	 * existing rules.
	 */
	fidx = cxgb4_get_free_ftid(dev, filter_type ? PF_INET6 : PF_INET,
				   false, cls->common.prio);
	if (fidx < 0) {
		NL_SET_ERR_MSG_MOD(extack,
				   "No free LETCAM index available");
		return -ENOMEM;
	}

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	fs = &tc_port_matchall->ingress.fs[filter_type];
	memset(fs, 0, sizeof(*fs));

	if (fidx < adap->tids.nhpftids)
		fs->prio = 1;
	fs->tc_prio = cls->common.prio;
	fs->tc_cookie = cls->cookie;
	fs->type = filter_type;
	fs->hitcnts = 1;

	fs->val.pfvf_vld = 1;
	fs->val.pf = adap->pf;
	fs->val.vf = pi->vin;

	cxgb4_process_flow_actions(dev, &cls->rule->action, fs);

	ret = cxgb4_set_filter(dev, fidx, fs);
	if (ret)
		return ret;

	tc_port_matchall->ingress.tid[filter_type] = fidx;
	return 0;
}

static int cxgb4_matchall_alloc_filter(struct net_device *dev,
				       struct tc_cls_matchall_offload *cls)
{
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	int ret, i;

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];

	ret = cxgb4_matchall_mirror_alloc(dev, cls);
	if (ret)
		return ret;

	for (i = 0; i < CXGB4_FILTER_TYPE_MAX; i++) {
		ret = cxgb4_matchall_add_filter(dev, cls, i);
		if (ret)
			goto out_free;
	}

	tc_port_matchall->ingress.state = CXGB4_MATCHALL_STATE_ENABLED;
	return 0;

out_free:
	while (i-- > 0)
		cxgb4_matchall_del_filter(dev, i);

	cxgb4_matchall_mirror_free(dev);
	return ret;
}

static int cxgb4_matchall_free_filter(struct net_device *dev)
{
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	int ret;
	u8 i;

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];

	for (i = 0; i < CXGB4_FILTER_TYPE_MAX; i++) {
		ret = cxgb4_matchall_del_filter(dev, i);
		if (ret)
			return ret;
	}

	cxgb4_matchall_mirror_free(dev);

	tc_port_matchall->ingress.packets = 0;
	tc_port_matchall->ingress.bytes = 0;
	tc_port_matchall->ingress.last_used = 0;
	tc_port_matchall->ingress.state = CXGB4_MATCHALL_STATE_DISABLED;
	return 0;
}

int cxgb4_tc_matchall_replace(struct net_device *dev,
			      struct tc_cls_matchall_offload *cls_matchall,
			      bool ingress)
{
	struct netlink_ext_ack *extack = cls_matchall->common.extack;
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	int ret;

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	if (ingress) {
		if (tc_port_matchall->ingress.state ==
		    CXGB4_MATCHALL_STATE_ENABLED) {
			NL_SET_ERR_MSG_MOD(extack,
					   "Only 1 Ingress MATCHALL can be offloaded");
			return -ENOMEM;
		}

		ret = cxgb4_validate_flow_actions(dev,
						  &cls_matchall->rule->action,
						  extack, 1);
		if (ret)
			return ret;

		return cxgb4_matchall_alloc_filter(dev, cls_matchall);
	}

	if (tc_port_matchall->egress.state == CXGB4_MATCHALL_STATE_ENABLED) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Only 1 Egress MATCHALL can be offloaded");
		return -ENOMEM;
	}

	ret = cxgb4_matchall_egress_validate(dev, cls_matchall);
	if (ret)
		return ret;

	return cxgb4_matchall_alloc_tc(dev, cls_matchall);
}

int cxgb4_tc_matchall_destroy(struct net_device *dev,
			      struct tc_cls_matchall_offload *cls_matchall,
			      bool ingress)
{
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	if (ingress) {
		/* All the filter types of this matchall rule save the
		 * same cookie. So, checking for the first one is
		 * enough.
		 */
		if (cls_matchall->cookie !=
		    tc_port_matchall->ingress.fs[0].tc_cookie)
			return -ENOENT;

		return cxgb4_matchall_free_filter(dev);
	}

	if (cls_matchall->cookie != tc_port_matchall->egress.cookie)
		return -ENOENT;

	cxgb4_matchall_free_tc(dev);
	return 0;
}

int cxgb4_tc_matchall_stats(struct net_device *dev,
			    struct tc_cls_matchall_offload *cls_matchall)
{
	u64 tmp_packets, tmp_bytes, packets = 0, bytes = 0;
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct cxgb4_matchall_ingress_entry *ingress;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);
	int ret;
	u8 i;

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	if (tc_port_matchall->ingress.state == CXGB4_MATCHALL_STATE_DISABLED)
		return -ENOENT;

	ingress = &tc_port_matchall->ingress;
	for (i = 0; i < CXGB4_FILTER_TYPE_MAX; i++) {
		ret = cxgb4_get_filter_counters(dev, ingress->tid[i],
						&tmp_packets, &tmp_bytes,
						ingress->fs[i].hash);
		if (ret)
			return ret;

		packets += tmp_packets;
		bytes += tmp_bytes;
	}

	if (tc_port_matchall->ingress.packets != packets) {
		flow_stats_update(&cls_matchall->stats,
				  bytes - tc_port_matchall->ingress.bytes,
				  packets - tc_port_matchall->ingress.packets,
				  0, tc_port_matchall->ingress.last_used,
				  FLOW_ACTION_HW_STATS_IMMEDIATE);

		tc_port_matchall->ingress.packets = packets;
		tc_port_matchall->ingress.bytes = bytes;
		tc_port_matchall->ingress.last_used = jiffies;
	}

	return 0;
}

static void cxgb4_matchall_disable_offload(struct net_device *dev)
{
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct port_info *pi = netdev2pinfo(dev);
	struct adapter *adap = netdev2adap(dev);

	tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
	if (tc_port_matchall->egress.state == CXGB4_MATCHALL_STATE_ENABLED)
		cxgb4_matchall_free_tc(dev);

	if (tc_port_matchall->ingress.state == CXGB4_MATCHALL_STATE_ENABLED)
		cxgb4_matchall_free_filter(dev);
}

int cxgb4_init_tc_matchall(struct adapter *adap)
{
	struct cxgb4_tc_port_matchall *tc_port_matchall;
	struct cxgb4_tc_matchall *tc_matchall;
	int ret;

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

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

	tc_matchall->port_matchall = tc_port_matchall;
	adap->tc_matchall = tc_matchall;
	return 0;

out_free_matchall:
	kfree(tc_matchall);
	return ret;
}

void cxgb4_cleanup_tc_matchall(struct adapter *adap)
{
	u8 i;

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

				if (dev)
					cxgb4_matchall_disable_offload(dev);
			}
			kfree(adap->tc_matchall->port_matchall);
		}
		kfree(adap->tc_matchall);
	}
}