DPDK logo

Elixir Cross Referencer

  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
/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   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 Intel Corporation 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 "rte_eth_ring.h"
#include <rte_mbuf.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
#include <rte_memcpy.h>
#include <rte_memzone.h>
#include <rte_string_fns.h>
#include <rte_vdev.h>
#include <rte_kvargs.h>
#include <rte_errno.h>

#define ETH_RING_NUMA_NODE_ACTION_ARG	"nodeaction"
#define ETH_RING_ACTION_CREATE		"CREATE"
#define ETH_RING_ACTION_ATTACH		"ATTACH"

static const char *valid_arguments[] = {
	ETH_RING_NUMA_NODE_ACTION_ARG,
	NULL
};

enum dev_action {
	DEV_CREATE,
	DEV_ATTACH
};

struct ring_queue {
	struct rte_ring *rng;
	rte_atomic64_t rx_pkts;
	rte_atomic64_t tx_pkts;
	rte_atomic64_t err_pkts;
};

struct pmd_internals {
	unsigned max_rx_queues;
	unsigned max_tx_queues;

	struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
	struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];

	struct ether_addr address;
	enum dev_action action;
};


static struct rte_eth_link pmd_link = {
		.link_speed = ETH_SPEED_NUM_10G,
		.link_duplex = ETH_LINK_FULL_DUPLEX,
		.link_status = ETH_LINK_DOWN,
		.link_autoneg = ETH_LINK_SPEED_AUTONEG
};

static uint16_t
eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
{
	void **ptrs = (void *)&bufs[0];
	struct ring_queue *r = q;
	const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
			ptrs, nb_bufs, NULL);
	if (r->rng->flags & RING_F_SC_DEQ)
		r->rx_pkts.cnt += nb_rx;
	else
		rte_atomic64_add(&(r->rx_pkts), nb_rx);
	return nb_rx;
}

static uint16_t
eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
{
	void **ptrs = (void *)&bufs[0];
	struct ring_queue *r = q;
	const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
			ptrs, nb_bufs, NULL);
	if (r->rng->flags & RING_F_SP_ENQ) {
		r->tx_pkts.cnt += nb_tx;
		r->err_pkts.cnt += nb_bufs - nb_tx;
	} else {
		rte_atomic64_add(&(r->tx_pkts), nb_tx);
		rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
	}
	return nb_tx;
}

static int
eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }

static int
eth_dev_start(struct rte_eth_dev *dev)
{
	dev->data->dev_link.link_status = ETH_LINK_UP;
	return 0;
}

static void
eth_dev_stop(struct rte_eth_dev *dev)
{
	dev->data->dev_link.link_status = ETH_LINK_DOWN;
}

static int
eth_dev_set_link_down(struct rte_eth_dev *dev)
{
	dev->data->dev_link.link_status = ETH_LINK_DOWN;
	return 0;
}

static int
eth_dev_set_link_up(struct rte_eth_dev *dev)
{
	dev->data->dev_link.link_status = ETH_LINK_UP;
	return 0;
}

static int
eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
				    uint16_t nb_rx_desc __rte_unused,
				    unsigned int socket_id __rte_unused,
				    const struct rte_eth_rxconf *rx_conf __rte_unused,
				    struct rte_mempool *mb_pool __rte_unused)
{
	struct pmd_internals *internals = dev->data->dev_private;
	dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
	return 0;
}

static int
eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
				    uint16_t nb_tx_desc __rte_unused,
				    unsigned int socket_id __rte_unused,
				    const struct rte_eth_txconf *tx_conf __rte_unused)
{
	struct pmd_internals *internals = dev->data->dev_private;
	dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
	return 0;
}


static void
eth_dev_info(struct rte_eth_dev *dev,
		struct rte_eth_dev_info *dev_info)
{
	struct pmd_internals *internals = dev->data->dev_private;
	dev_info->max_mac_addrs = 1;
	dev_info->max_rx_pktlen = (uint32_t)-1;
	dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
	dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
	dev_info->min_rx_bufsize = 0;
}

static void
eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
{
	unsigned i;
	unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
	const struct pmd_internals *internal = dev->data->dev_private;

	for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
			i < dev->data->nb_rx_queues; i++) {
		stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
		rx_total += stats->q_ipackets[i];
	}

	for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
			i < dev->data->nb_tx_queues; i++) {
		stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
		stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
		tx_total += stats->q_opackets[i];
		tx_err_total += stats->q_errors[i];
	}

	stats->ipackets = rx_total;
	stats->opackets = tx_total;
	stats->oerrors = tx_err_total;
}

static void
eth_stats_reset(struct rte_eth_dev *dev)
{
	unsigned i;
	struct pmd_internals *internal = dev->data->dev_private;
	for (i = 0; i < dev->data->nb_rx_queues; i++)
		internal->rx_ring_queues[i].rx_pkts.cnt = 0;
	for (i = 0; i < dev->data->nb_tx_queues; i++) {
		internal->tx_ring_queues[i].tx_pkts.cnt = 0;
		internal->tx_ring_queues[i].err_pkts.cnt = 0;
	}
}

static void
eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
	uint32_t index __rte_unused)
{
}

static int
eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
	struct ether_addr *mac_addr __rte_unused,
	uint32_t index __rte_unused,
	uint32_t vmdq __rte_unused)
{
	return -ENOTSUP;
}

static void
eth_queue_release(void *q __rte_unused) { ; }
static int
eth_link_update(struct rte_eth_dev *dev __rte_unused,
		int wait_to_complete __rte_unused) { return 0; }

static const struct eth_dev_ops ops = {
	.dev_start = eth_dev_start,
	.dev_stop = eth_dev_stop,
	.dev_set_link_up = eth_dev_set_link_up,
	.dev_set_link_down = eth_dev_set_link_down,
	.dev_configure = eth_dev_configure,
	.dev_infos_get = eth_dev_info,
	.rx_queue_setup = eth_rx_queue_setup,
	.tx_queue_setup = eth_tx_queue_setup,
	.rx_queue_release = eth_queue_release,
	.tx_queue_release = eth_queue_release,
	.link_update = eth_link_update,
	.stats_get = eth_stats_get,
	.stats_reset = eth_stats_reset,
	.mac_addr_remove = eth_mac_addr_remove,
	.mac_addr_add = eth_mac_addr_add,
};

static struct rte_vdev_driver pmd_ring_drv;

static int
do_eth_dev_ring_create(const char *name,
		struct rte_ring * const rx_queues[], const unsigned nb_rx_queues,
		struct rte_ring *const tx_queues[], const unsigned nb_tx_queues,
		const unsigned numa_node, enum dev_action action)
{
	struct rte_eth_dev_data *data = NULL;
	struct pmd_internals *internals = NULL;
	struct rte_eth_dev *eth_dev = NULL;
	unsigned i;

	RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
			numa_node);

	/* now do all data allocation - for eth_dev structure, dummy pci driver
	 * and internal (private) data
	 */
	data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
	if (data == NULL) {
		rte_errno = ENOMEM;
		goto error;
	}

	data->rx_queues = rte_zmalloc_socket(name,
			sizeof(void *) * nb_rx_queues, 0, numa_node);
	if (data->rx_queues == NULL) {
		rte_errno = ENOMEM;
		goto error;
	}

	data->tx_queues = rte_zmalloc_socket(name,
			sizeof(void *) * nb_tx_queues, 0, numa_node);
	if (data->tx_queues == NULL) {
		rte_errno = ENOMEM;
		goto error;
	}

	internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
	if (internals == NULL) {
		rte_errno = ENOMEM;
		goto error;
	}

	/* reserve an ethdev entry */
	eth_dev = rte_eth_dev_allocate(name);
	if (eth_dev == NULL) {
		rte_errno = ENOSPC;
		goto error;
	}

	/* now put it all together
	 * - store queue data in internals,
	 * - store numa_node info in eth_dev_data
	 * - point eth_dev_data to internals
	 * - and point eth_dev structure to new eth_dev_data structure
	 */
	/* NOTE: we'll replace the data element, of originally allocated eth_dev
	 * so the rings are local per-process */

	internals->action = action;
	internals->max_rx_queues = nb_rx_queues;
	internals->max_tx_queues = nb_tx_queues;
	for (i = 0; i < nb_rx_queues; i++) {
		internals->rx_ring_queues[i].rng = rx_queues[i];
		data->rx_queues[i] = &internals->rx_ring_queues[i];
	}
	for (i = 0; i < nb_tx_queues; i++) {
		internals->tx_ring_queues[i].rng = tx_queues[i];
		data->tx_queues[i] = &internals->tx_ring_queues[i];
	}

	data->dev_private = internals;
	data->port_id = eth_dev->data->port_id;
	memmove(data->name, eth_dev->data->name, sizeof(data->name));
	data->nb_rx_queues = (uint16_t)nb_rx_queues;
	data->nb_tx_queues = (uint16_t)nb_tx_queues;
	data->dev_link = pmd_link;
	data->mac_addrs = &internals->address;

	eth_dev->data = data;
	eth_dev->dev_ops = &ops;
	data->dev_flags = RTE_ETH_DEV_DETACHABLE;
	data->kdrv = RTE_KDRV_NONE;
	data->drv_name = pmd_ring_drv.driver.name;
	data->numa_node = numa_node;

	/* finally assign rx and tx ops */
	eth_dev->rx_pkt_burst = eth_ring_rx;
	eth_dev->tx_pkt_burst = eth_ring_tx;

	return data->port_id;

error:
	if (data) {
		rte_free(data->rx_queues);
		rte_free(data->tx_queues);
	}
	rte_free(data);
	rte_free(internals);

	return -1;
}

int
rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
		const unsigned nb_rx_queues,
		struct rte_ring *const tx_queues[],
		const unsigned nb_tx_queues,
		const unsigned numa_node)
{
	/* do some parameter checking */
	if (rx_queues == NULL && nb_rx_queues > 0) {
		rte_errno = EINVAL;
		return -1;
	}
	if (tx_queues == NULL && nb_tx_queues > 0) {
		rte_errno = EINVAL;
		return -1;
	}
	if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
		rte_errno = EINVAL;
		return -1;
	}

	return do_eth_dev_ring_create(name, rx_queues, nb_rx_queues,
			tx_queues, nb_tx_queues, numa_node, DEV_ATTACH);
}

int
rte_eth_from_ring(struct rte_ring *r)
{
	return rte_eth_from_rings(r->name, &r, 1, &r, 1,
			r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
}

static int
eth_dev_ring_create(const char *name, const unsigned numa_node,
		enum dev_action action)
{
	/* rx and tx are so-called from point of view of first port.
	 * They are inverted from the point of view of second port
	 */
	struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
	unsigned i;
	char rng_name[RTE_RING_NAMESIZE];
	unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
			RTE_PMD_RING_MAX_TX_RINGS);

	for (i = 0; i < num_rings; i++) {
		snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
		rxtx[i] = (action == DEV_CREATE) ?
				rte_ring_create(rng_name, 1024, numa_node,
						RING_F_SP_ENQ|RING_F_SC_DEQ) :
				rte_ring_lookup(rng_name);
		if (rxtx[i] == NULL)
			return -1;
	}

	if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
		numa_node, action) < 0)
		return -1;

	return 0;
}

struct node_action_pair {
	char name[PATH_MAX];
	unsigned node;
	enum dev_action action;
};

struct node_action_list {
	unsigned total;
	unsigned count;
	struct node_action_pair *list;
};

static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
{
	struct node_action_list *info = data;
	int ret;
	char *name;
	char *action;
	char *node;
	char *end;

	name = strdup(value);

	ret = -EINVAL;

	if (!name) {
		RTE_LOG(WARNING, PMD, "command line paramter is empty for ring pmd!\n");
		goto out;
	}

	node = strchr(name, ':');
	if (!node) {
		RTE_LOG(WARNING, PMD, "could not parse node value from %s", name);
		goto out;
	}

	*node = '\0';
	node++;

	action = strchr(node, ':');
	if (!action) {
		RTE_LOG(WARNING, PMD, "could not action value from %s", node);
		goto out;
	}

	*action = '\0';
	action++;

	/*
	 * Need to do some sanity checking here
	 */

	if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
		info->list[info->count].action = DEV_ATTACH;
	else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
		info->list[info->count].action = DEV_CREATE;
	else
		goto out;

	errno = 0;
	info->list[info->count].node = strtol(node, &end, 10);

	if ((errno != 0) || (*end != '\0')) {
		RTE_LOG(WARNING, PMD, "node value %s is unparseable as a number\n", node);
		goto out;
	}

	snprintf(info->list[info->count].name, sizeof(info->list[info->count].name), "%s", name);

	info->count++;

	ret = 0;
out:
	free(name);
	return ret;
}

static int
rte_pmd_ring_probe(struct rte_vdev_device *dev)
{
	const char *name, *params;
	struct rte_kvargs *kvlist = NULL;
	int ret = 0;
	struct node_action_list *info = NULL;

	name = rte_vdev_device_name(dev);
	params = rte_vdev_device_args(dev);

	RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);

	if (params == NULL || params[0] == '\0') {
		ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);
		if (ret == -1) {
			RTE_LOG(INFO, PMD,
				"Attach to pmd_ring for %s\n", name);
			ret = eth_dev_ring_create(name, rte_socket_id(),
						  DEV_ATTACH);
		}
	}
	else {
		kvlist = rte_kvargs_parse(params, valid_arguments);

		if (!kvlist) {
			RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
					" rings-backed ethernet device\n");
			ret = eth_dev_ring_create(name, rte_socket_id(),
						  DEV_CREATE);
			if (ret == -1) {
				RTE_LOG(INFO, PMD,
					"Attach to pmd_ring for %s\n",
					name);
				ret = eth_dev_ring_create(name, rte_socket_id(),
							  DEV_ATTACH);
			}
			return ret;
		} else {
			ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
			info = rte_zmalloc("struct node_action_list",
					   sizeof(struct node_action_list) +
					   (sizeof(struct node_action_pair) * ret),
					   0);
			if (!info)
				goto out_free;

			info->total = ret;
			info->list = (struct node_action_pair*)(info + 1);

			ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
						 parse_kvlist, info);

			if (ret < 0)
				goto out_free;

			for (info->count = 0; info->count < info->total; info->count++) {
				ret = eth_dev_ring_create(info->list[info->count].name,
							  info->list[info->count].node,
							  info->list[info->count].action);
				if ((ret == -1) &&
				    (info->list[info->count].action == DEV_CREATE)) {
					RTE_LOG(INFO, PMD,
						"Attach to pmd_ring for %s\n",
						name);
					ret = eth_dev_ring_create(name,
							info->list[info->count].node,
							DEV_ATTACH);
				}
			}
		}
	}

out_free:
	rte_kvargs_free(kvlist);
	rte_free(info);
	return ret;
}

static int
rte_pmd_ring_remove(struct rte_vdev_device *dev)
{
	const char *name = rte_vdev_device_name(dev);
	struct rte_eth_dev *eth_dev = NULL;
	struct pmd_internals *internals = NULL;
	struct ring_queue *r = NULL;
	uint16_t i;

	RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);

	if (name == NULL)
		return -EINVAL;

	/* find an ethdev entry */
	eth_dev = rte_eth_dev_allocated(name);
	if (eth_dev == NULL)
		return -ENODEV;

	eth_dev_stop(eth_dev);

	internals = eth_dev->data->dev_private;
	if (internals->action == DEV_CREATE) {
		/*
		 * it is only necessary to delete the rings in rx_queues because
		 * they are the same used in tx_queues
		 */
		for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
			r = eth_dev->data->rx_queues[i];
			rte_ring_free(r->rng);
		}
	}

	rte_free(eth_dev->data->rx_queues);
	rte_free(eth_dev->data->tx_queues);
	rte_free(eth_dev->data->dev_private);

	rte_free(eth_dev->data);

	rte_eth_dev_release_port(eth_dev);
	return 0;
}

static struct rte_vdev_driver pmd_ring_drv = {
	.probe = rte_pmd_ring_probe,
	.remove = rte_pmd_ring_remove,
};

RTE_PMD_REGISTER_VDEV(net_ring, pmd_ring_drv);
RTE_PMD_REGISTER_ALIAS(net_ring, eth_ring);
RTE_PMD_REGISTER_PARAM_STRING(net_ring,
	ETH_RING_NUMA_NODE_ACTION_ARG "=name:node:action(ATTACH|CREATE)");