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35 #include <rte_ethdev.h>
36 #include <rte_malloc.h>
37 #include <rte_memcpy.h>
39 #include <rte_kvargs.h>
41 #define ETH_NULL_PACKET_SIZE_ARG "size"
42 #define ETH_NULL_PACKET_COPY_ARG "copy"
44 static unsigned default_packet_size = 64;
45 static unsigned default_packet_copy;
47 static const char *valid_arguments[] = {
48 ETH_NULL_PACKET_SIZE_ARG,
49 ETH_NULL_PACKET_COPY_ARG,
56 struct pmd_internals *internals;
58 struct rte_mempool *mb_pool;
59 struct rte_mbuf *dummy_packet;
61 rte_atomic64_t rx_pkts;
62 rte_atomic64_t tx_pkts;
63 rte_atomic64_t err_pkts;
66 struct pmd_internals {
71 unsigned nb_rx_queues;
72 unsigned nb_tx_queues;
74 struct null_queue rx_null_queues[1];
75 struct null_queue tx_null_queues[1];
79 static struct ether_addr eth_addr = { .addr_bytes = {0} };
80 static const char *drivername = "Null PMD";
81 static struct rte_eth_link pmd_link = {
83 .link_duplex = ETH_LINK_FULL_DUPLEX,
88 eth_null_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
91 struct null_queue *h = q;
94 if ((q == NULL) || (bufs == NULL))
97 packet_size = h->internals->packet_size;
98 for (i = 0; i < nb_bufs; i++) {
99 bufs[i] = rte_pktmbuf_alloc(h->mb_pool);
102 bufs[i]->data_len = (uint16_t)packet_size;
103 bufs[i]->pkt_len = packet_size;
104 bufs[i]->nb_segs = 1;
105 bufs[i]->next = NULL;
108 rte_atomic64_add(&(h->rx_pkts), i);
114 eth_null_copy_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
117 struct null_queue *h = q;
118 unsigned packet_size;
120 if ((q == NULL) || (bufs == NULL))
123 packet_size = h->internals->packet_size;
124 for (i = 0; i < nb_bufs; i++) {
125 bufs[i] = rte_pktmbuf_alloc(h->mb_pool);
128 rte_memcpy(rte_pktmbuf_mtod(bufs[i], void *), h->dummy_packet,
130 bufs[i]->data_len = (uint16_t)packet_size;
131 bufs[i]->pkt_len = packet_size;
132 bufs[i]->nb_segs = 1;
133 bufs[i]->next = NULL;
136 rte_atomic64_add(&(h->rx_pkts), i);
142 eth_null_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
145 struct null_queue *h = q;
147 if ((q == NULL) || (bufs == NULL))
150 for (i = 0; i < nb_bufs; i++)
151 rte_pktmbuf_free(bufs[i]);
153 rte_atomic64_add(&(h->tx_pkts), i);
159 eth_null_copy_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
162 struct null_queue *h = q;
163 unsigned packet_size;
165 if ((q == NULL) || (bufs == NULL))
168 packet_size = h->internals->packet_size;
169 for (i = 0; i < nb_bufs; i++) {
170 rte_memcpy(h->dummy_packet, rte_pktmbuf_mtod(bufs[i], void *),
172 rte_pktmbuf_free(bufs[i]);
175 rte_atomic64_add(&(h->tx_pkts), i);
181 eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
184 eth_dev_start(struct rte_eth_dev *dev)
189 dev->data->dev_link.link_status = 1;
194 eth_dev_stop(struct rte_eth_dev *dev)
199 dev->data->dev_link.link_status = 0;
203 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
204 uint16_t nb_rx_desc __rte_unused,
205 unsigned int socket_id __rte_unused,
206 const struct rte_eth_rxconf *rx_conf __rte_unused,
207 struct rte_mempool *mb_pool)
209 struct rte_mbuf *dummy_packet;
210 struct pmd_internals *internals;
211 unsigned packet_size;
213 if ((dev == NULL) || (mb_pool == NULL))
216 if (rx_queue_id != 0)
219 internals = dev->data->dev_private;
220 packet_size = internals->packet_size;
222 internals->rx_null_queues[rx_queue_id].mb_pool = mb_pool;
223 dev->data->rx_queues[rx_queue_id] =
224 &internals->rx_null_queues[rx_queue_id];
225 dummy_packet = rte_zmalloc_socket(NULL,
226 packet_size, 0, internals->numa_node);
227 if (dummy_packet == NULL)
230 internals->rx_null_queues[rx_queue_id].internals = internals;
231 internals->rx_null_queues[rx_queue_id].dummy_packet = dummy_packet;
237 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
238 uint16_t nb_tx_desc __rte_unused,
239 unsigned int socket_id __rte_unused,
240 const struct rte_eth_txconf *tx_conf __rte_unused)
242 struct rte_mbuf *dummy_packet;
243 struct pmd_internals *internals;
244 unsigned packet_size;
249 if (tx_queue_id != 0)
252 internals = dev->data->dev_private;
253 packet_size = internals->packet_size;
255 dev->data->tx_queues[tx_queue_id] =
256 &internals->tx_null_queues[tx_queue_id];
257 dummy_packet = rte_zmalloc_socket(NULL,
258 packet_size, 0, internals->numa_node);
259 if (dummy_packet == NULL)
262 internals->tx_null_queues[tx_queue_id].internals = internals;
263 internals->tx_null_queues[tx_queue_id].dummy_packet = dummy_packet;
270 eth_dev_info(struct rte_eth_dev *dev,
271 struct rte_eth_dev_info *dev_info)
273 struct pmd_internals *internals;
275 if ((dev == NULL) || (dev_info == NULL))
278 internals = dev->data->dev_private;
279 dev_info->driver_name = drivername;
280 dev_info->max_mac_addrs = 1;
281 dev_info->max_rx_pktlen = (uint32_t)-1;
282 dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
283 dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
284 dev_info->min_rx_bufsize = 0;
285 dev_info->pci_dev = NULL;
289 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
291 unsigned i, num_stats;
292 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
293 const struct pmd_internals *internal;
295 if ((dev == NULL) || (igb_stats == NULL))
298 internal = dev->data->dev_private;
299 memset(igb_stats, 0, sizeof(*igb_stats));
300 num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
301 internal->nb_rx_queues);
302 for (i = 0; i < num_stats; i++) {
303 igb_stats->q_ipackets[i] =
304 internal->rx_null_queues[i].rx_pkts.cnt;
305 rx_total += igb_stats->q_ipackets[i];
308 num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
309 internal->nb_tx_queues);
310 for (i = 0; i < num_stats; i++) {
311 igb_stats->q_opackets[i] =
312 internal->tx_null_queues[i].tx_pkts.cnt;
313 igb_stats->q_errors[i] =
314 internal->tx_null_queues[i].err_pkts.cnt;
315 tx_total += igb_stats->q_opackets[i];
316 tx_err_total += igb_stats->q_errors[i];
319 igb_stats->ipackets = rx_total;
320 igb_stats->opackets = tx_total;
321 igb_stats->oerrors = tx_err_total;
325 eth_stats_reset(struct rte_eth_dev *dev)
328 struct pmd_internals *internal;
333 internal = dev->data->dev_private;
334 for (i = 0; i < internal->nb_rx_queues; i++)
335 internal->rx_null_queues[i].rx_pkts.cnt = 0;
336 for (i = 0; i < internal->nb_tx_queues; i++) {
337 internal->tx_null_queues[i].tx_pkts.cnt = 0;
338 internal->tx_null_queues[i].err_pkts.cnt = 0;
342 static struct eth_driver rte_null_pmd = {
344 .name = "rte_null_pmd",
345 .drv_flags = RTE_PCI_DRV_DETACHABLE,
350 eth_queue_release(void *q)
352 struct null_queue *nq;
358 rte_free(nq->dummy_packet);
362 eth_link_update(struct rte_eth_dev *dev __rte_unused,
363 int wait_to_complete __rte_unused) { return 0; }
365 static const struct eth_dev_ops ops = {
366 .dev_start = eth_dev_start,
367 .dev_stop = eth_dev_stop,
368 .dev_configure = eth_dev_configure,
369 .dev_infos_get = eth_dev_info,
370 .rx_queue_setup = eth_rx_queue_setup,
371 .tx_queue_setup = eth_tx_queue_setup,
372 .rx_queue_release = eth_queue_release,
373 .tx_queue_release = eth_queue_release,
374 .link_update = eth_link_update,
375 .stats_get = eth_stats_get,
376 .stats_reset = eth_stats_reset,
380 eth_dev_null_create(const char *name,
381 const unsigned numa_node,
382 unsigned packet_size,
383 unsigned packet_copy)
385 const unsigned nb_rx_queues = 1;
386 const unsigned nb_tx_queues = 1;
387 struct rte_eth_dev_data *data = NULL;
388 struct rte_pci_device *pci_dev = NULL;
389 struct pmd_internals *internals = NULL;
390 struct rte_eth_dev *eth_dev = NULL;
395 RTE_LOG(INFO, PMD, "Creating null ethdev on numa socket %u\n",
398 /* now do all data allocation - for eth_dev structure, dummy pci driver
399 * and internal (private) data
401 data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
405 pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
409 internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
410 if (internals == NULL)
413 /* reserve an ethdev entry */
414 eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
418 /* now put it all together
419 * - store queue data in internals,
420 * - store numa_node info in pci_driver
421 * - point eth_dev_data to internals and pci_driver
422 * - and point eth_dev structure to new eth_dev_data structure
424 /* NOTE: we'll replace the data element, of originally allocated eth_dev
425 * so the nulls are local per-process */
427 internals->nb_rx_queues = nb_rx_queues;
428 internals->nb_tx_queues = nb_tx_queues;
429 internals->packet_size = packet_size;
430 internals->packet_copy = packet_copy;
431 internals->numa_node = numa_node;
433 pci_dev->numa_node = numa_node;
435 data->dev_private = internals;
436 data->port_id = eth_dev->data->port_id;
437 data->nb_rx_queues = (uint16_t)nb_rx_queues;
438 data->nb_tx_queues = (uint16_t)nb_tx_queues;
439 data->dev_link = pmd_link;
440 data->mac_addrs = ð_addr;
441 strncpy(data->name, eth_dev->data->name, strlen(eth_dev->data->name));
443 eth_dev->data = data;
444 eth_dev->dev_ops = &ops;
445 eth_dev->pci_dev = pci_dev;
446 eth_dev->driver = &rte_null_pmd;
448 /* finally assign rx and tx ops */
450 eth_dev->rx_pkt_burst = eth_null_copy_rx;
451 eth_dev->tx_pkt_burst = eth_null_copy_tx;
453 eth_dev->rx_pkt_burst = eth_null_rx;
454 eth_dev->tx_pkt_burst = eth_null_tx;
468 get_packet_size_arg(const char *key __rte_unused,
469 const char *value, void *extra_args)
471 const char *a = value;
472 unsigned *packet_size = extra_args;
474 if ((value == NULL) || (extra_args == NULL))
477 *packet_size = (unsigned)strtoul(a, NULL, 0);
478 if (*packet_size == UINT_MAX)
485 get_packet_copy_arg(const char *key __rte_unused,
486 const char *value, void *extra_args)
488 const char *a = value;
489 unsigned *packet_copy = extra_args;
491 if ((value == NULL) || (extra_args == NULL))
494 *packet_copy = (unsigned)strtoul(a, NULL, 0);
495 if (*packet_copy == UINT_MAX)
502 rte_pmd_null_devinit(const char *name, const char *params)
505 unsigned packet_size = default_packet_size;
506 unsigned packet_copy = default_packet_copy;
507 struct rte_kvargs *kvlist = NULL;
513 RTE_LOG(INFO, PMD, "Initializing pmd_null for %s\n", name);
515 numa_node = rte_socket_id();
517 if (params != NULL) {
518 kvlist = rte_kvargs_parse(params, valid_arguments);
522 if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_SIZE_ARG) == 1) {
524 ret = rte_kvargs_process(kvlist,
525 ETH_NULL_PACKET_SIZE_ARG,
526 &get_packet_size_arg, &packet_size);
531 if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_COPY_ARG) == 1) {
533 ret = rte_kvargs_process(kvlist,
534 ETH_NULL_PACKET_COPY_ARG,
535 &get_packet_copy_arg, &packet_copy);
541 RTE_LOG(INFO, PMD, "Configure pmd_null: packet size is %d, "
542 "packet copy is %s\n", packet_size,
543 packet_copy ? "enabled" : "disabled");
545 ret = eth_dev_null_create(name, numa_node, packet_size, packet_copy);
549 rte_kvargs_free(kvlist);
554 rte_pmd_null_devuninit(const char *name)
556 struct rte_eth_dev *eth_dev = NULL;
561 RTE_LOG(INFO, PMD, "Closing null ethdev on numa socket %u\n",
564 /* reserve an ethdev entry */
565 eth_dev = rte_eth_dev_allocated(name);
569 rte_free(eth_dev->data->dev_private);
570 rte_free(eth_dev->data);
571 rte_free(eth_dev->pci_dev);
573 rte_eth_dev_release_port(eth_dev);
578 static struct rte_driver pmd_null_drv = {
581 .init = rte_pmd_null_devinit,
582 .uninit = rte_pmd_null_devuninit,
585 PMD_REGISTER_DRIVER(pmd_null_drv);