net/ring: fix return value check
[dpdk.git] / drivers / net / ring / rte_eth_ring.c
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright(c) 2010-2015 Intel Corporation
3  */
4
5 #include "rte_eth_ring.h"
6 #include <rte_mbuf.h>
7 #include <rte_ethdev_driver.h>
8 #include <rte_malloc.h>
9 #include <rte_memcpy.h>
10 #include <rte_string_fns.h>
11 #include <rte_bus_vdev.h>
12 #include <rte_kvargs.h>
13 #include <rte_errno.h>
14
15 #define ETH_RING_NUMA_NODE_ACTION_ARG   "nodeaction"
16 #define ETH_RING_ACTION_CREATE          "CREATE"
17 #define ETH_RING_ACTION_ATTACH          "ATTACH"
18 #define ETH_RING_INTERNAL_ARG           "internal"
19
20 static const char *valid_arguments[] = {
21         ETH_RING_NUMA_NODE_ACTION_ARG,
22         ETH_RING_INTERNAL_ARG,
23         NULL
24 };
25
26 struct ring_internal_args {
27         struct rte_ring * const *rx_queues;
28         const unsigned int nb_rx_queues;
29         struct rte_ring * const *tx_queues;
30         const unsigned int nb_tx_queues;
31         const unsigned int numa_node;
32         void *addr; /* self addr for sanity check */
33 };
34
35 enum dev_action {
36         DEV_CREATE,
37         DEV_ATTACH
38 };
39
40 struct ring_queue {
41         struct rte_ring *rng;
42         rte_atomic64_t rx_pkts;
43         rte_atomic64_t tx_pkts;
44         rte_atomic64_t err_pkts;
45 };
46
47 struct pmd_internals {
48         unsigned int max_rx_queues;
49         unsigned int max_tx_queues;
50
51         struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
52         struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
53
54         struct ether_addr address;
55         enum dev_action action;
56 };
57
58 static struct rte_eth_link pmd_link = {
59         .link_speed = ETH_SPEED_NUM_10G,
60         .link_duplex = ETH_LINK_FULL_DUPLEX,
61         .link_status = ETH_LINK_DOWN,
62         .link_autoneg = ETH_LINK_FIXED,
63 };
64
65 static int eth_ring_logtype;
66
67 #define PMD_LOG(level, fmt, args...) \
68         rte_log(RTE_LOG_ ## level, eth_ring_logtype, \
69                 "%s(): " fmt "\n", __func__, ##args)
70
71 static uint16_t
72 eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
73 {
74         void **ptrs = (void *)&bufs[0];
75         struct ring_queue *r = q;
76         const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
77                         ptrs, nb_bufs, NULL);
78         if (r->rng->flags & RING_F_SC_DEQ)
79                 r->rx_pkts.cnt += nb_rx;
80         else
81                 rte_atomic64_add(&(r->rx_pkts), nb_rx);
82         return nb_rx;
83 }
84
85 static uint16_t
86 eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
87 {
88         void **ptrs = (void *)&bufs[0];
89         struct ring_queue *r = q;
90         const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
91                         ptrs, nb_bufs, NULL);
92         if (r->rng->flags & RING_F_SP_ENQ) {
93                 r->tx_pkts.cnt += nb_tx;
94                 r->err_pkts.cnt += nb_bufs - nb_tx;
95         } else {
96                 rte_atomic64_add(&(r->tx_pkts), nb_tx);
97                 rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
98         }
99         return nb_tx;
100 }
101
102 static int
103 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
104
105 static int
106 eth_dev_start(struct rte_eth_dev *dev)
107 {
108         dev->data->dev_link.link_status = ETH_LINK_UP;
109         return 0;
110 }
111
112 static void
113 eth_dev_stop(struct rte_eth_dev *dev)
114 {
115         dev->data->dev_link.link_status = ETH_LINK_DOWN;
116 }
117
118 static int
119 eth_dev_set_link_down(struct rte_eth_dev *dev)
120 {
121         dev->data->dev_link.link_status = ETH_LINK_DOWN;
122         return 0;
123 }
124
125 static int
126 eth_dev_set_link_up(struct rte_eth_dev *dev)
127 {
128         dev->data->dev_link.link_status = ETH_LINK_UP;
129         return 0;
130 }
131
132 static int
133 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
134                                     uint16_t nb_rx_desc __rte_unused,
135                                     unsigned int socket_id __rte_unused,
136                                     const struct rte_eth_rxconf *rx_conf __rte_unused,
137                                     struct rte_mempool *mb_pool __rte_unused)
138 {
139         struct pmd_internals *internals = dev->data->dev_private;
140
141         dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
142         return 0;
143 }
144
145 static int
146 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
147                                     uint16_t nb_tx_desc __rte_unused,
148                                     unsigned int socket_id __rte_unused,
149                                     const struct rte_eth_txconf *tx_conf __rte_unused)
150 {
151         struct pmd_internals *internals = dev->data->dev_private;
152
153         dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
154         return 0;
155 }
156
157
158 static void
159 eth_dev_info(struct rte_eth_dev *dev,
160              struct rte_eth_dev_info *dev_info)
161 {
162         struct pmd_internals *internals = dev->data->dev_private;
163
164         dev_info->max_mac_addrs = 1;
165         dev_info->max_rx_pktlen = (uint32_t)-1;
166         dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
167         dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
168         dev_info->min_rx_bufsize = 0;
169 }
170
171 static int
172 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
173 {
174         unsigned int i;
175         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
176         const struct pmd_internals *internal = dev->data->dev_private;
177
178         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
179                         i < dev->data->nb_rx_queues; i++) {
180                 stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
181                 rx_total += stats->q_ipackets[i];
182         }
183
184         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
185                         i < dev->data->nb_tx_queues; i++) {
186                 stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
187                 stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
188                 tx_total += stats->q_opackets[i];
189                 tx_err_total += stats->q_errors[i];
190         }
191
192         stats->ipackets = rx_total;
193         stats->opackets = tx_total;
194         stats->oerrors = tx_err_total;
195
196         return 0;
197 }
198
199 static void
200 eth_stats_reset(struct rte_eth_dev *dev)
201 {
202         unsigned int i;
203         struct pmd_internals *internal = dev->data->dev_private;
204
205         for (i = 0; i < dev->data->nb_rx_queues; i++)
206                 internal->rx_ring_queues[i].rx_pkts.cnt = 0;
207         for (i = 0; i < dev->data->nb_tx_queues; i++) {
208                 internal->tx_ring_queues[i].tx_pkts.cnt = 0;
209                 internal->tx_ring_queues[i].err_pkts.cnt = 0;
210         }
211 }
212
213 static void
214 eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
215         uint32_t index __rte_unused)
216 {
217 }
218
219 static int
220 eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
221         struct ether_addr *mac_addr __rte_unused,
222         uint32_t index __rte_unused,
223         uint32_t vmdq __rte_unused)
224 {
225         return 0;
226 }
227
228 static void
229 eth_queue_release(void *q __rte_unused) { ; }
230 static int
231 eth_link_update(struct rte_eth_dev *dev __rte_unused,
232                 int wait_to_complete __rte_unused) { return 0; }
233
234 static const struct eth_dev_ops ops = {
235         .dev_start = eth_dev_start,
236         .dev_stop = eth_dev_stop,
237         .dev_set_link_up = eth_dev_set_link_up,
238         .dev_set_link_down = eth_dev_set_link_down,
239         .dev_configure = eth_dev_configure,
240         .dev_infos_get = eth_dev_info,
241         .rx_queue_setup = eth_rx_queue_setup,
242         .tx_queue_setup = eth_tx_queue_setup,
243         .rx_queue_release = eth_queue_release,
244         .tx_queue_release = eth_queue_release,
245         .link_update = eth_link_update,
246         .stats_get = eth_stats_get,
247         .stats_reset = eth_stats_reset,
248         .mac_addr_remove = eth_mac_addr_remove,
249         .mac_addr_add = eth_mac_addr_add,
250 };
251
252 static struct rte_vdev_driver pmd_ring_drv;
253
254 static int
255 do_eth_dev_ring_create(const char *name,
256                 struct rte_ring * const rx_queues[],
257                 const unsigned int nb_rx_queues,
258                 struct rte_ring *const tx_queues[],
259                 const unsigned int nb_tx_queues,
260                 const unsigned int numa_node, enum dev_action action,
261                 struct rte_eth_dev **eth_dev_p)
262 {
263         struct rte_eth_dev_data *data = NULL;
264         struct pmd_internals *internals = NULL;
265         struct rte_eth_dev *eth_dev = NULL;
266         void **rx_queues_local = NULL;
267         void **tx_queues_local = NULL;
268         unsigned int i;
269
270         PMD_LOG(INFO, "Creating rings-backed ethdev on numa socket %u",
271                         numa_node);
272
273         rx_queues_local = rte_calloc_socket(name, nb_rx_queues,
274                                             sizeof(void *), 0, numa_node);
275         if (rx_queues_local == NULL) {
276                 rte_errno = ENOMEM;
277                 goto error;
278         }
279
280         tx_queues_local = rte_calloc_socket(name, nb_tx_queues,
281                                             sizeof(void *), 0, numa_node);
282         if (tx_queues_local == NULL) {
283                 rte_errno = ENOMEM;
284                 goto error;
285         }
286
287         internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
288         if (internals == NULL) {
289                 rte_errno = ENOMEM;
290                 goto error;
291         }
292
293         /* reserve an ethdev entry */
294         eth_dev = rte_eth_dev_allocate(name);
295         if (eth_dev == NULL) {
296                 rte_errno = ENOSPC;
297                 goto error;
298         }
299
300         /* now put it all together
301          * - store queue data in internals,
302          * - store numa_node info in eth_dev_data
303          * - point eth_dev_data to internals
304          * - and point eth_dev structure to new eth_dev_data structure
305          */
306
307         data = eth_dev->data;
308         data->rx_queues = rx_queues_local;
309         data->tx_queues = tx_queues_local;
310
311         internals->action = action;
312         internals->max_rx_queues = nb_rx_queues;
313         internals->max_tx_queues = nb_tx_queues;
314         for (i = 0; i < nb_rx_queues; i++) {
315                 internals->rx_ring_queues[i].rng = rx_queues[i];
316                 data->rx_queues[i] = &internals->rx_ring_queues[i];
317         }
318         for (i = 0; i < nb_tx_queues; i++) {
319                 internals->tx_ring_queues[i].rng = tx_queues[i];
320                 data->tx_queues[i] = &internals->tx_ring_queues[i];
321         }
322
323         data->dev_private = internals;
324         data->nb_rx_queues = (uint16_t)nb_rx_queues;
325         data->nb_tx_queues = (uint16_t)nb_tx_queues;
326         data->dev_link = pmd_link;
327         data->mac_addrs = &internals->address;
328
329         eth_dev->dev_ops = &ops;
330         data->kdrv = RTE_KDRV_NONE;
331         data->numa_node = numa_node;
332
333         /* finally assign rx and tx ops */
334         eth_dev->rx_pkt_burst = eth_ring_rx;
335         eth_dev->tx_pkt_burst = eth_ring_tx;
336
337         rte_eth_dev_probing_finish(eth_dev);
338         *eth_dev_p = eth_dev;
339
340         return data->port_id;
341
342 error:
343         rte_free(rx_queues_local);
344         rte_free(tx_queues_local);
345         rte_free(internals);
346
347         return -1;
348 }
349
350 int
351 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
352                 const unsigned int nb_rx_queues,
353                 struct rte_ring *const tx_queues[],
354                 const unsigned int nb_tx_queues,
355                 const unsigned int numa_node)
356 {
357         struct ring_internal_args args = {
358                 .rx_queues = rx_queues,
359                 .nb_rx_queues = nb_rx_queues,
360                 .tx_queues = tx_queues,
361                 .nb_tx_queues = nb_tx_queues,
362                 .numa_node = numa_node,
363                 .addr = &args,
364         };
365         char args_str[32];
366         char ring_name[RTE_RING_NAMESIZE];
367         uint16_t port_id = RTE_MAX_ETHPORTS;
368         int ret;
369
370         /* do some parameter checking */
371         if (rx_queues == NULL && nb_rx_queues > 0) {
372                 rte_errno = EINVAL;
373                 return -1;
374         }
375         if (tx_queues == NULL && nb_tx_queues > 0) {
376                 rte_errno = EINVAL;
377                 return -1;
378         }
379         if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
380                 rte_errno = EINVAL;
381                 return -1;
382         }
383
384         snprintf(args_str, sizeof(args_str), "%s=%p",
385                  ETH_RING_INTERNAL_ARG, &args);
386
387         ret = snprintf(ring_name, sizeof(ring_name), "net_ring_%s", name);
388         if (ret >= (int)sizeof(ring_name)) {
389                 rte_errno = ENAMETOOLONG;
390                 return -1;
391         }
392
393         ret = rte_vdev_init(ring_name, args_str);
394         if (ret) {
395                 rte_errno = EINVAL;
396                 return -1;
397         }
398
399         ret = rte_eth_dev_get_port_by_name(ring_name, &port_id);
400         if (ret) {
401                 rte_errno = ENODEV;
402                 return -1;
403         }
404
405         return port_id;
406 }
407
408 int
409 rte_eth_from_ring(struct rte_ring *r)
410 {
411         return rte_eth_from_rings(r->name, &r, 1, &r, 1,
412                         r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
413 }
414
415 static int
416 eth_dev_ring_create(const char *name, const unsigned int numa_node,
417                 enum dev_action action, struct rte_eth_dev **eth_dev)
418 {
419         /* rx and tx are so-called from point of view of first port.
420          * They are inverted from the point of view of second port
421          */
422         struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
423         unsigned int i;
424         char rng_name[RTE_RING_NAMESIZE];
425         unsigned int num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
426                         RTE_PMD_RING_MAX_TX_RINGS);
427
428         for (i = 0; i < num_rings; i++) {
429                 int cc;
430
431                 cc = snprintf(rng_name, sizeof(rng_name),
432                               "ETH_RXTX%u_%s", i, name);
433                 if (cc >= (int)sizeof(rng_name)) {
434                         rte_errno = ENAMETOOLONG;
435                         return -1;
436                 }
437
438                 rxtx[i] = (action == DEV_CREATE) ?
439                                 rte_ring_create(rng_name, 1024, numa_node,
440                                                 RING_F_SP_ENQ|RING_F_SC_DEQ) :
441                                 rte_ring_lookup(rng_name);
442                 if (rxtx[i] == NULL)
443                         return -1;
444         }
445
446         if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
447                 numa_node, action, eth_dev) < 0)
448                 return -1;
449
450         return 0;
451 }
452
453 struct node_action_pair {
454         char name[PATH_MAX];
455         unsigned int node;
456         enum dev_action action;
457 };
458
459 struct node_action_list {
460         unsigned int total;
461         unsigned int count;
462         struct node_action_pair *list;
463 };
464
465 static int parse_kvlist(const char *key __rte_unused,
466                         const char *value, void *data)
467 {
468         struct node_action_list *info = data;
469         int ret;
470         char *name;
471         char *action;
472         char *node;
473         char *end;
474
475         name = strdup(value);
476
477         ret = -EINVAL;
478
479         if (!name) {
480                 PMD_LOG(WARNING, "command line parameter is empty for ring pmd!");
481                 goto out;
482         }
483
484         node = strchr(name, ':');
485         if (!node) {
486                 PMD_LOG(WARNING, "could not parse node value from %s",
487                         name);
488                 goto out;
489         }
490
491         *node = '\0';
492         node++;
493
494         action = strchr(node, ':');
495         if (!action) {
496                 PMD_LOG(WARNING, "could not parse action value from %s",
497                         node);
498                 goto out;
499         }
500
501         *action = '\0';
502         action++;
503
504         /*
505          * Need to do some sanity checking here
506          */
507
508         if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
509                 info->list[info->count].action = DEV_ATTACH;
510         else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
511                 info->list[info->count].action = DEV_CREATE;
512         else
513                 goto out;
514
515         errno = 0;
516         info->list[info->count].node = strtol(node, &end, 10);
517
518         if ((errno != 0) || (*end != '\0')) {
519                 PMD_LOG(WARNING,
520                         "node value %s is unparseable as a number", node);
521                 goto out;
522         }
523
524         strlcpy(info->list[info->count].name, name,
525                 sizeof(info->list[info->count].name));
526
527         info->count++;
528
529         ret = 0;
530 out:
531         free(name);
532         return ret;
533 }
534
535 static int
536 parse_internal_args(const char *key __rte_unused, const char *value,
537                 void *data)
538 {
539         struct ring_internal_args **internal_args = data;
540         void *args;
541
542         sscanf(value, "%p", &args);
543
544         *internal_args = args;
545
546         if ((*internal_args)->addr != args)
547                 return -1;
548
549         return 0;
550 }
551
552 static int
553 rte_pmd_ring_probe(struct rte_vdev_device *dev)
554 {
555         const char *name, *params;
556         struct rte_kvargs *kvlist = NULL;
557         int ret = 0;
558         struct node_action_list *info = NULL;
559         struct rte_eth_dev *eth_dev = NULL;
560         struct ring_internal_args *internal_args;
561
562         name = rte_vdev_device_name(dev);
563         params = rte_vdev_device_args(dev);
564
565         PMD_LOG(INFO, "Initializing pmd_ring for %s", name);
566
567         if (params == NULL || params[0] == '\0') {
568                 ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE,
569                                 &eth_dev);
570                 if (ret == -1) {
571                         PMD_LOG(INFO,
572                                 "Attach to pmd_ring for %s", name);
573                         ret = eth_dev_ring_create(name, rte_socket_id(),
574                                                   DEV_ATTACH, &eth_dev);
575                 }
576         } else {
577                 kvlist = rte_kvargs_parse(params, valid_arguments);
578
579                 if (!kvlist) {
580                         PMD_LOG(INFO,
581                                 "Ignoring unsupported parameters when creatingrings-backed ethernet device");
582                         ret = eth_dev_ring_create(name, rte_socket_id(),
583                                                   DEV_CREATE, &eth_dev);
584                         if (ret == -1) {
585                                 PMD_LOG(INFO,
586                                         "Attach to pmd_ring for %s",
587                                         name);
588                                 ret = eth_dev_ring_create(name, rte_socket_id(),
589                                                           DEV_ATTACH, &eth_dev);
590                         }
591
592                         if (eth_dev)
593                                 eth_dev->device = &dev->device;
594
595                         return ret;
596                 }
597
598                 if (rte_kvargs_count(kvlist, ETH_RING_INTERNAL_ARG) == 1) {
599                         ret = rte_kvargs_process(kvlist, ETH_RING_INTERNAL_ARG,
600                                                  parse_internal_args,
601                                                  &internal_args);
602                         if (ret < 0)
603                                 goto out_free;
604
605                         ret = do_eth_dev_ring_create(name,
606                                 internal_args->rx_queues,
607                                 internal_args->nb_rx_queues,
608                                 internal_args->tx_queues,
609                                 internal_args->nb_tx_queues,
610                                 internal_args->numa_node,
611                                 DEV_ATTACH,
612                                 &eth_dev);
613                         if (ret >= 0)
614                                 ret = 0;
615                 } else {
616                         ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
617                         info = rte_zmalloc("struct node_action_list",
618                                            sizeof(struct node_action_list) +
619                                            (sizeof(struct node_action_pair) * ret),
620                                            0);
621                         if (!info)
622                                 goto out_free;
623
624                         info->total = ret;
625                         info->list = (struct node_action_pair *)(info + 1);
626
627                         ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
628                                                  parse_kvlist, info);
629
630                         if (ret < 0)
631                                 goto out_free;
632
633                         for (info->count = 0; info->count < info->total; info->count++) {
634                                 ret = eth_dev_ring_create(info->list[info->count].name,
635                                                           info->list[info->count].node,
636                                                           info->list[info->count].action,
637                                                           &eth_dev);
638                                 if ((ret == -1) &&
639                                     (info->list[info->count].action == DEV_CREATE)) {
640                                         PMD_LOG(INFO,
641                                                 "Attach to pmd_ring for %s",
642                                                 name);
643                                         ret = eth_dev_ring_create(name,
644                                                         info->list[info->count].node,
645                                                         DEV_ATTACH,
646                                                         &eth_dev);
647                                 }
648                         }
649                 }
650         }
651
652         if (eth_dev)
653                 eth_dev->device = &dev->device;
654
655 out_free:
656         rte_kvargs_free(kvlist);
657         rte_free(info);
658         return ret;
659 }
660
661 static int
662 rte_pmd_ring_remove(struct rte_vdev_device *dev)
663 {
664         const char *name = rte_vdev_device_name(dev);
665         struct rte_eth_dev *eth_dev = NULL;
666         struct pmd_internals *internals = NULL;
667         struct ring_queue *r = NULL;
668         uint16_t i;
669
670         PMD_LOG(INFO, "Un-Initializing pmd_ring for %s", name);
671
672         if (name == NULL)
673                 return -EINVAL;
674
675         /* find an ethdev entry */
676         eth_dev = rte_eth_dev_allocated(name);
677         if (eth_dev == NULL)
678                 return -ENODEV;
679
680         eth_dev_stop(eth_dev);
681
682         internals = eth_dev->data->dev_private;
683         if (internals->action == DEV_CREATE) {
684                 /*
685                  * it is only necessary to delete the rings in rx_queues because
686                  * they are the same used in tx_queues
687                  */
688                 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
689                         r = eth_dev->data->rx_queues[i];
690                         rte_ring_free(r->rng);
691                 }
692         }
693
694         /* mac_addrs must not be freed alone because part of dev_private */
695         eth_dev->data->mac_addrs = NULL;
696         rte_eth_dev_release_port(eth_dev);
697         return 0;
698 }
699
700 static struct rte_vdev_driver pmd_ring_drv = {
701         .probe = rte_pmd_ring_probe,
702         .remove = rte_pmd_ring_remove,
703 };
704
705 RTE_PMD_REGISTER_VDEV(net_ring, pmd_ring_drv);
706 RTE_PMD_REGISTER_ALIAS(net_ring, eth_ring);
707 RTE_PMD_REGISTER_PARAM_STRING(net_ring,
708         ETH_RING_NUMA_NODE_ACTION_ARG "=name:node:action(ATTACH|CREATE)");
709
710 RTE_INIT(eth_ring_init_log)
711 {
712         eth_ring_logtype = rte_log_register("pmd.net.ring");
713         if (eth_ring_logtype >= 0)
714                 rte_log_set_level(eth_ring_logtype, RTE_LOG_NOTICE);
715 }