summaryrefslogtreecommitdiffstats
path: root/drivers/net/mlx5/mlx5_rxmode.c
blob: 173e6e842bbc7090d022e52929447ab79f9ace9d (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
/*-
 *   BSD LICENSE
 *
 *   Copyright 2015 6WIND S.A.
 *   Copyright 2015 Mellanox.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of 6WIND S.A. nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stddef.h>
#include <errno.h>
#include <string.h>

/* Verbs header. */
/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
#ifdef PEDANTIC
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
#include <infiniband/verbs.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-Wpedantic"
#endif

/* DPDK headers don't like -pedantic. */
#ifdef PEDANTIC
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
#include <rte_ethdev.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-Wpedantic"
#endif

#include "mlx5.h"
#include "mlx5_rxtx.h"
#include "mlx5_utils.h"

/* Initialization data for special flows. */
static const struct special_flow_init special_flow_init[] = {
	[HASH_RXQ_FLOW_TYPE_PROMISC] = {
		.dst_mac_val = "\x00\x00\x00\x00\x00\x00",
		.dst_mac_mask = "\x00\x00\x00\x00\x00\x00",
		.hash_types =
			1 << HASH_RXQ_TCPV4 |
			1 << HASH_RXQ_UDPV4 |
			1 << HASH_RXQ_IPV4 |
			1 << HASH_RXQ_TCPV6 |
			1 << HASH_RXQ_UDPV6 |
			1 << HASH_RXQ_IPV6 |
			1 << HASH_RXQ_ETH |
			0,
		.per_vlan = 0,
	},
	[HASH_RXQ_FLOW_TYPE_ALLMULTI] = {
		.dst_mac_val = "\x01\x00\x00\x00\x00\x00",
		.dst_mac_mask = "\x01\x00\x00\x00\x00\x00",
		.hash_types =
			1 << HASH_RXQ_UDPV4 |
			1 << HASH_RXQ_IPV4 |
			1 << HASH_RXQ_UDPV6 |
			1 << HASH_RXQ_IPV6 |
			1 << HASH_RXQ_ETH |
			0,
		.per_vlan = 0,
	},
	[HASH_RXQ_FLOW_TYPE_BROADCAST] = {
		.dst_mac_val = "\xff\xff\xff\xff\xff\xff",
		.dst_mac_mask = "\xff\xff\xff\xff\xff\xff",
		.hash_types =
			1 << HASH_RXQ_UDPV4 |
			1 << HASH_RXQ_IPV4 |
			1 << HASH_RXQ_UDPV6 |
			1 << HASH_RXQ_IPV6 |
			1 << HASH_RXQ_ETH |
			0,
		.per_vlan = 1,
	},
	[HASH_RXQ_FLOW_TYPE_IPV6MULTI] = {
		.dst_mac_val = "\x33\x33\x00\x00\x00\x00",
		.dst_mac_mask = "\xff\xff\x00\x00\x00\x00",
		.hash_types =
			1 << HASH_RXQ_UDPV6 |
			1 << HASH_RXQ_IPV6 |
			1 << HASH_RXQ_ETH |
			0,
		.per_vlan = 1,
	},
};

/**
 * Enable a special flow in a hash RX queue for a given VLAN index.
 *
 * @param hash_rxq
 *   Pointer to hash RX queue structure.
 * @param flow_type
 *   Special flow type.
 * @param vlan_index
 *   VLAN index to use.
 *
 * @return
 *   0 on success, errno value on failure.
 */
static int
hash_rxq_special_flow_enable_vlan(struct hash_rxq *hash_rxq,
				  enum hash_rxq_flow_type flow_type,
				  unsigned int vlan_index)
{
	struct priv *priv = hash_rxq->priv;
	struct ibv_exp_flow *flow;
	FLOW_ATTR_SPEC_ETH(data, priv_flow_attr(priv, NULL, 0, hash_rxq->type));
	struct ibv_exp_flow_attr *attr = &data->attr;
	struct ibv_exp_flow_spec_eth *spec = &data->spec;
	const uint8_t *mac;
	const uint8_t *mask;
	unsigned int vlan_enabled = (priv->vlan_filter_n &&
				     special_flow_init[flow_type].per_vlan);
	unsigned int vlan_id = priv->vlan_filter[vlan_index];

	/* Check if flow is relevant for this hash_rxq. */
	if (!(special_flow_init[flow_type].hash_types & (1 << hash_rxq->type)))
		return 0;
	/* Check if flow already exists. */
	if (hash_rxq->special_flow[flow_type][vlan_index] != NULL)
		return 0;

	/*
	 * No padding must be inserted by the compiler between attr and spec.
	 * This layout is expected by libibverbs.
	 */
	assert(((uint8_t *)attr + sizeof(*attr)) == (uint8_t *)spec);
	priv_flow_attr(priv, attr, sizeof(data), hash_rxq->type);
	/* The first specification must be Ethernet. */
	assert(spec->type == IBV_EXP_FLOW_SPEC_ETH);
	assert(spec->size == sizeof(*spec));

	mac = special_flow_init[flow_type].dst_mac_val;
	mask = special_flow_init[flow_type].dst_mac_mask;
	*spec = (struct ibv_exp_flow_spec_eth){
		.type = IBV_EXP_FLOW_SPEC_ETH,
		.size = sizeof(*spec),
		.val = {
			.dst_mac = {
				mac[0], mac[1], mac[2],
				mac[3], mac[4], mac[5],
			},
			.vlan_tag = (vlan_enabled ? htons(vlan_id) : 0),
		},
		.mask = {
			.dst_mac = {
				mask[0], mask[1], mask[2],
				mask[3], mask[4], mask[5],
			},
			.vlan_tag = (vlan_enabled ? htons(0xfff) : 0),
		},
	};

	errno = 0;
	flow = ibv_exp_create_flow(hash_rxq->qp, attr);
	if (flow == NULL) {
		/* It's not clear whether errno is always set in this case. */
		ERROR("%p: flow configuration failed, errno=%d: %s",
		      (void *)hash_rxq, errno,
		      (errno ? strerror(errno) : "Unknown error"));
		if (errno)
			return errno;
		return EINVAL;
	}
	hash_rxq->special_flow[flow_type][vlan_index] = flow;
	DEBUG("%p: special flow %s (index %d) VLAN %u (index %u) enabled",
	      (void *)hash_rxq, hash_rxq_flow_type_str(flow_type), flow_type,
	      vlan_id, vlan_index);
	return 0;
}

/**
 * Disable a special flow in a hash RX queue for a given VLAN index.
 *
 * @param hash_rxq
 *   Pointer to hash RX queue structure.
 * @param flow_type
 *   Special flow type.
 * @param vlan_index
 *   VLAN index to use.
 */
static void
hash_rxq_special_flow_disable_vlan(struct hash_rxq *hash_rxq,
				   enum hash_rxq_flow_type flow_type,
				   unsigned int vlan_index)
{
	struct ibv_exp_flow *flow =
		hash_rxq->special_flow[flow_type][vlan_index];

	if (flow == NULL)
		return;
	claim_zero(ibv_exp_destroy_flow(flow));
	hash_rxq->special_flow[flow_type][vlan_index] = NULL;
	DEBUG("%p: special flow %s (index %d) VLAN %u (index %u) disabled",
	      (void *)hash_rxq, hash_rxq_flow_type_str(flow_type), flow_type,
	      hash_rxq->priv->vlan_filter[vlan_index], vlan_index);
}

/**
 * Enable a special flow in a hash RX queue.
 *
 * @param hash_rxq
 *   Pointer to hash RX queue structure.
 * @param flow_type
 *   Special flow type.
 * @param vlan_index
 *   VLAN index to use.
 *
 * @return
 *   0 on success, errno value on failure.
 */
static int
hash_rxq_special_flow_enable(struct hash_rxq *hash_rxq,
			     enum hash_rxq_flow_type flow_type)
{
	struct priv *priv = hash_rxq->priv;
	unsigned int i = 0;
	int ret;

	assert((unsigned int)flow_type < RTE_DIM(hash_rxq->special_flow));
	assert(RTE_DIM(hash_rxq->special_flow[flow_type]) ==
	       RTE_DIM(priv->vlan_filter));
	/* Add a special flow for each VLAN filter when relevant. */
	do {
		ret = hash_rxq_special_flow_enable_vlan(hash_rxq, flow_type, i);
		if (ret) {
			/* Failure, rollback. */
			while (i != 0)
				hash_rxq_special_flow_disable_vlan(hash_rxq,
								   flow_type,
								   --i);
			return ret;
		}
	} while (special_flow_init[flow_type].per_vlan &&
		 ++i < priv->vlan_filter_n);
	return 0;
}

/**
 * Disable a special flow in a hash RX queue.
 *
 * @param hash_rxq
 *   Pointer to hash RX queue structure.
 * @param flow_type
 *   Special flow type.
 */
static void
hash_rxq_special_flow_disable(struct hash_rxq *hash_rxq,
			      enum hash_rxq_flow_type flow_type)
{
	unsigned int i;

	assert((unsigned int)flow_type < RTE_DIM(hash_rxq->special_flow));
	for (i = 0; (i != RTE_DIM(hash_rxq->special_flow[flow_type])); ++i)
		hash_rxq_special_flow_disable_vlan(hash_rxq, flow_type, i);
}

/**
 * Enable a special flow in all hash RX queues.
 *
 * @param priv
 *   Private structure.
 * @param flow_type
 *   Special flow type.
 *
 * @return
 *   0 on success, errno value on failure.
 */
int
priv_special_flow_enable(struct priv *priv, enum hash_rxq_flow_type flow_type)
{
	unsigned int i;

	if (!priv_allow_flow_type(priv, flow_type))
		return 0;
	for (i = 0; (i != priv->hash_rxqs_n); ++i) {
		struct hash_rxq *hash_rxq = &(*priv->hash_rxqs)[i];
		int ret;

		ret = hash_rxq_special_flow_enable(hash_rxq, flow_type);
		if (!ret)
			continue;
		/* Failure, rollback. */
		while (i != 0) {
			hash_rxq = &(*priv->hash_rxqs)[--i];
			hash_rxq_special_flow_disable(hash_rxq, flow_type);
		}
		return ret;
	}
	return 0;
}

/**
 * Disable a special flow in all hash RX queues.
 *
 * @param priv
 *   Private structure.
 * @param flow_type
 *   Special flow type.
 */
void
priv_special_flow_disable(struct priv *priv, enum hash_rxq_flow_type flow_type)
{
	unsigned int i;

	for (i = 0; (i != priv->hash_rxqs_n); ++i) {
		struct hash_rxq *hash_rxq = &(*priv->hash_rxqs)[i];

		hash_rxq_special_flow_disable(hash_rxq, flow_type);
	}
}

/**
 * Enable all special flows in all hash RX queues.
 *
 * @param priv
 *   Private structure.
 */
int
priv_special_flow_enable_all(struct priv *priv)
{
	enum hash_rxq_flow_type flow_type;

	for (flow_type = HASH_RXQ_FLOW_TYPE_PROMISC;
			flow_type != HASH_RXQ_FLOW_TYPE_MAC;
			++flow_type) {
		int ret;

		ret = priv_special_flow_enable(priv, flow_type);
		if (!ret)
			continue;
		/* Failure, rollback. */
		while (flow_type)
			priv_special_flow_disable(priv, --flow_type);
		return ret;
	}
	return 0;
}

/**
 * Disable all special flows in all hash RX queues.
 *
 * @param priv
 *   Private structure.
 */
void
priv_special_flow_disable_all(struct priv *priv)
{
	enum hash_rxq_flow_type flow_type;

	for (flow_type = HASH_RXQ_FLOW_TYPE_PROMISC;
			flow_type != HASH_RXQ_FLOW_TYPE_MAC;
			++flow_type)
		priv_special_flow_disable(priv, flow_type);
}

/**
 * DPDK callback to enable promiscuous mode.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
void
mlx5_promiscuous_enable(struct rte_eth_dev *dev)
{
	struct priv *priv = dev->data->dev_private;
	int ret;

	if (mlx5_is_secondary())
		return;

	priv_lock(priv);
	priv->promisc_req = 1;
	ret = priv_rehash_flows(priv);
	if (ret)
		ERROR("error while enabling promiscuous mode: %s",
		      strerror(ret));
	priv_unlock(priv);
}

/**
 * DPDK callback to disable promiscuous mode.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
void
mlx5_promiscuous_disable(struct rte_eth_dev *dev)
{
	struct priv *priv = dev->data->dev_private;
	int ret;

	if (mlx5_is_secondary())
		return;

	priv_lock(priv);
	priv->promisc_req = 0;
	ret = priv_rehash_flows(priv);
	if (ret)
		ERROR("error while disabling promiscuous mode: %s",
		      strerror(ret));
	priv_unlock(priv);
}

/**
 * DPDK callback to enable allmulti mode.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
void
mlx5_allmulticast_enable(struct rte_eth_dev *dev)
{
	struct priv *priv = dev->data->dev_private;
	int ret;

	if (mlx5_is_secondary())
		return;

	priv_lock(priv);
	priv->allmulti_req = 1;
	ret = priv_rehash_flows(priv);
	if (ret)
		ERROR("error while enabling allmulticast mode: %s",
		      strerror(ret));
	priv_unlock(priv);
}

/**
 * DPDK callback to disable allmulti mode.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 */
void
mlx5_allmulticast_disable(struct rte_eth_dev *dev)
{
	struct priv *priv = dev->data->dev_private;
	int ret;

	if (mlx5_is_secondary())
		return;

	priv_lock(priv);
	priv->allmulti_req = 0;
	ret = priv_rehash_flows(priv);
	if (ret)
		ERROR("error while disabling allmulticast mode: %s",
		      strerror(ret));
	priv_unlock(priv);
}