1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Intel Corporation
9 #include <rte_string_fns.h>
10 #include <rte_ethdev_driver.h>
11 #include <rte_ethdev_vdev.h>
13 #include <rte_kvargs.h>
14 #include <rte_malloc.h>
15 #include <rte_bus_vdev.h>
17 /* Only single queue supported */
18 #define KNI_MAX_QUEUE_PER_PORT 1
20 #define MAX_KNI_PORTS 8
22 #define KNI_ETHER_MTU(mbuf_size) \
23 ((mbuf_size) - RTE_ETHER_HDR_LEN) /**< Ethernet MTU. */
25 #define ETH_KNI_NO_REQUEST_THREAD_ARG "no_request_thread"
26 static const char * const valid_arguments[] = {
27 ETH_KNI_NO_REQUEST_THREAD_ARG,
32 int no_request_thread;
35 struct pmd_queue_stats {
41 struct pmd_internals *internals;
42 struct rte_mempool *mb_pool;
44 struct pmd_queue_stats rx;
45 struct pmd_queue_stats tx;
48 struct pmd_internals {
55 int no_request_thread;
57 struct rte_ether_addr eth_addr;
59 struct pmd_queue rx_queues[KNI_MAX_QUEUE_PER_PORT];
60 struct pmd_queue tx_queues[KNI_MAX_QUEUE_PER_PORT];
63 static const struct rte_eth_link pmd_link = {
64 .link_speed = ETH_SPEED_NUM_10G,
65 .link_duplex = ETH_LINK_FULL_DUPLEX,
66 .link_status = ETH_LINK_DOWN,
67 .link_autoneg = ETH_LINK_FIXED,
69 static int is_kni_initialized;
71 RTE_LOG_REGISTER(eth_kni_logtype, pmd.net.kni, NOTICE);
73 #define PMD_LOG(level, fmt, args...) \
74 rte_log(RTE_LOG_ ## level, eth_kni_logtype, \
75 "%s(): " fmt "\n", __func__, ##args)
77 eth_kni_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
79 struct pmd_queue *kni_q = q;
80 struct rte_kni *kni = kni_q->internals->kni;
84 nb_pkts = rte_kni_rx_burst(kni, bufs, nb_bufs);
85 for (i = 0; i < nb_pkts; i++)
86 bufs[i]->port = kni_q->internals->port_id;
88 kni_q->rx.pkts += nb_pkts;
94 eth_kni_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
96 struct pmd_queue *kni_q = q;
97 struct rte_kni *kni = kni_q->internals->kni;
100 nb_pkts = rte_kni_tx_burst(kni, bufs, nb_bufs);
102 kni_q->tx.pkts += nb_pkts;
108 kni_handle_request(void *param)
110 struct pmd_internals *internals = param;
113 while (!internals->stop_thread) {
114 rte_kni_handle_request(internals->kni);
122 eth_kni_start(struct rte_eth_dev *dev)
124 struct pmd_internals *internals = dev->data->dev_private;
125 uint16_t port_id = dev->data->port_id;
126 struct rte_mempool *mb_pool;
127 struct rte_kni_conf conf;
128 const char *name = dev->device->name + 4; /* remove net_ */
130 mb_pool = internals->rx_queues[0].mb_pool;
131 strlcpy(conf.name, name, RTE_KNI_NAMESIZE);
133 conf.group_id = port_id;
135 rte_pktmbuf_data_room_size(mb_pool) - RTE_PKTMBUF_HEADROOM;
136 conf.mtu = KNI_ETHER_MTU(conf.mbuf_size);
138 internals->kni = rte_kni_alloc(mb_pool, &conf, NULL);
139 if (internals->kni == NULL) {
141 "Fail to create kni interface for port: %d",
150 eth_kni_dev_start(struct rte_eth_dev *dev)
152 struct pmd_internals *internals = dev->data->dev_private;
155 if (internals->is_kni_started == 0) {
156 ret = eth_kni_start(dev);
159 internals->is_kni_started = 1;
162 if (internals->no_request_thread == 0) {
163 internals->stop_thread = 0;
165 ret = rte_ctrl_thread_create(&internals->thread,
166 "kni_handle_req", NULL,
167 kni_handle_request, internals);
170 "Fail to create kni request thread");
175 dev->data->dev_link.link_status = 1;
181 eth_kni_dev_stop(struct rte_eth_dev *dev)
183 struct pmd_internals *internals = dev->data->dev_private;
186 if (internals->no_request_thread == 0 && internals->stop_thread == 0) {
187 internals->stop_thread = 1;
189 ret = pthread_cancel(internals->thread);
191 PMD_LOG(ERR, "Can't cancel the thread");
193 ret = pthread_join(internals->thread, NULL);
195 PMD_LOG(ERR, "Can't join the thread");
198 dev->data->dev_link.link_status = 0;
202 eth_kni_close(struct rte_eth_dev *eth_dev)
204 struct pmd_internals *internals;
207 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
210 eth_kni_dev_stop(eth_dev);
212 /* mac_addrs must not be freed alone because part of dev_private */
213 eth_dev->data->mac_addrs = NULL;
215 internals = eth_dev->data->dev_private;
216 ret = rte_kni_release(internals->kni);
218 PMD_LOG(WARNING, "Not able to release kni for %s",
219 eth_dev->data->name);
225 eth_kni_dev_configure(struct rte_eth_dev *dev __rte_unused)
231 eth_kni_dev_info(struct rte_eth_dev *dev __rte_unused,
232 struct rte_eth_dev_info *dev_info)
234 dev_info->max_mac_addrs = 1;
235 dev_info->max_rx_pktlen = UINT32_MAX;
236 dev_info->max_rx_queues = KNI_MAX_QUEUE_PER_PORT;
237 dev_info->max_tx_queues = KNI_MAX_QUEUE_PER_PORT;
238 dev_info->min_rx_bufsize = 0;
244 eth_kni_rx_queue_setup(struct rte_eth_dev *dev,
245 uint16_t rx_queue_id,
246 uint16_t nb_rx_desc __rte_unused,
247 unsigned int socket_id __rte_unused,
248 const struct rte_eth_rxconf *rx_conf __rte_unused,
249 struct rte_mempool *mb_pool)
251 struct pmd_internals *internals = dev->data->dev_private;
254 q = &internals->rx_queues[rx_queue_id];
255 q->internals = internals;
256 q->mb_pool = mb_pool;
258 dev->data->rx_queues[rx_queue_id] = q;
264 eth_kni_tx_queue_setup(struct rte_eth_dev *dev,
265 uint16_t tx_queue_id,
266 uint16_t nb_tx_desc __rte_unused,
267 unsigned int socket_id __rte_unused,
268 const struct rte_eth_txconf *tx_conf __rte_unused)
270 struct pmd_internals *internals = dev->data->dev_private;
273 q = &internals->tx_queues[tx_queue_id];
274 q->internals = internals;
276 dev->data->tx_queues[tx_queue_id] = q;
282 eth_kni_queue_release(void *q __rte_unused)
287 eth_kni_link_update(struct rte_eth_dev *dev __rte_unused,
288 int wait_to_complete __rte_unused)
294 eth_kni_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
296 unsigned long rx_packets_total = 0, rx_bytes_total = 0;
297 unsigned long tx_packets_total = 0, tx_bytes_total = 0;
298 struct rte_eth_dev_data *data = dev->data;
299 unsigned int i, num_stats;
302 num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
304 for (i = 0; i < num_stats; i++) {
305 q = data->rx_queues[i];
306 stats->q_ipackets[i] = q->rx.pkts;
307 stats->q_ibytes[i] = q->rx.bytes;
308 rx_packets_total += stats->q_ipackets[i];
309 rx_bytes_total += stats->q_ibytes[i];
312 num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
314 for (i = 0; i < num_stats; i++) {
315 q = data->tx_queues[i];
316 stats->q_opackets[i] = q->tx.pkts;
317 stats->q_obytes[i] = q->tx.bytes;
318 tx_packets_total += stats->q_opackets[i];
319 tx_bytes_total += stats->q_obytes[i];
322 stats->ipackets = rx_packets_total;
323 stats->ibytes = rx_bytes_total;
324 stats->opackets = tx_packets_total;
325 stats->obytes = tx_bytes_total;
331 eth_kni_stats_reset(struct rte_eth_dev *dev)
333 struct rte_eth_dev_data *data = dev->data;
337 for (i = 0; i < data->nb_rx_queues; i++) {
338 q = data->rx_queues[i];
342 for (i = 0; i < data->nb_tx_queues; i++) {
343 q = data->tx_queues[i];
351 static const struct eth_dev_ops eth_kni_ops = {
352 .dev_start = eth_kni_dev_start,
353 .dev_stop = eth_kni_dev_stop,
354 .dev_close = eth_kni_close,
355 .dev_configure = eth_kni_dev_configure,
356 .dev_infos_get = eth_kni_dev_info,
357 .rx_queue_setup = eth_kni_rx_queue_setup,
358 .tx_queue_setup = eth_kni_tx_queue_setup,
359 .rx_queue_release = eth_kni_queue_release,
360 .tx_queue_release = eth_kni_queue_release,
361 .link_update = eth_kni_link_update,
362 .stats_get = eth_kni_stats_get,
363 .stats_reset = eth_kni_stats_reset,
366 static struct rte_eth_dev *
367 eth_kni_create(struct rte_vdev_device *vdev,
368 struct eth_kni_args *args,
369 unsigned int numa_node)
371 struct pmd_internals *internals;
372 struct rte_eth_dev_data *data;
373 struct rte_eth_dev *eth_dev;
375 PMD_LOG(INFO, "Creating kni ethdev on numa socket %u",
378 /* reserve an ethdev entry */
379 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*internals));
383 internals = eth_dev->data->dev_private;
384 internals->port_id = eth_dev->data->port_id;
385 data = eth_dev->data;
386 data->nb_rx_queues = 1;
387 data->nb_tx_queues = 1;
388 data->dev_link = pmd_link;
389 data->mac_addrs = &internals->eth_addr;
390 data->promiscuous = 1;
391 data->all_multicast = 1;
393 rte_eth_random_addr(internals->eth_addr.addr_bytes);
395 eth_dev->dev_ops = ð_kni_ops;
397 internals->no_request_thread = args->no_request_thread;
405 if (is_kni_initialized == 0)
406 rte_kni_init(MAX_KNI_PORTS);
408 is_kni_initialized++;
414 eth_kni_kvargs_process(struct eth_kni_args *args, const char *params)
416 struct rte_kvargs *kvlist;
418 kvlist = rte_kvargs_parse(params, valid_arguments);
422 memset(args, 0, sizeof(struct eth_kni_args));
424 if (rte_kvargs_count(kvlist, ETH_KNI_NO_REQUEST_THREAD_ARG) == 1)
425 args->no_request_thread = 1;
427 rte_kvargs_free(kvlist);
433 eth_kni_probe(struct rte_vdev_device *vdev)
435 struct rte_eth_dev *eth_dev;
436 struct eth_kni_args args;
441 name = rte_vdev_device_name(vdev);
442 params = rte_vdev_device_args(vdev);
443 PMD_LOG(INFO, "Initializing eth_kni for %s", name);
445 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
446 eth_dev = rte_eth_dev_attach_secondary(name);
448 PMD_LOG(ERR, "Failed to probe %s", name);
451 /* TODO: request info from primary to set up Rx and Tx */
452 eth_dev->dev_ops = ð_kni_ops;
453 eth_dev->device = &vdev->device;
454 rte_eth_dev_probing_finish(eth_dev);
458 ret = eth_kni_kvargs_process(&args, params);
466 eth_dev = eth_kni_create(vdev, &args, rte_socket_id());
470 eth_dev->rx_pkt_burst = eth_kni_rx;
471 eth_dev->tx_pkt_burst = eth_kni_tx;
473 rte_eth_dev_probing_finish(eth_dev);
477 is_kni_initialized--;
478 if (is_kni_initialized == 0)
484 eth_kni_remove(struct rte_vdev_device *vdev)
486 struct rte_eth_dev *eth_dev;
489 name = rte_vdev_device_name(vdev);
490 PMD_LOG(INFO, "Un-Initializing eth_kni for %s", name);
492 /* find the ethdev entry */
493 eth_dev = rte_eth_dev_allocated(name);
494 if (eth_dev != NULL) {
495 if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
496 eth_kni_dev_stop(eth_dev);
497 return rte_eth_dev_release_port(eth_dev);
499 eth_kni_close(eth_dev);
500 rte_eth_dev_release_port(eth_dev);
503 is_kni_initialized--;
504 if (is_kni_initialized == 0)
510 static struct rte_vdev_driver eth_kni_drv = {
511 .probe = eth_kni_probe,
512 .remove = eth_kni_remove,
515 RTE_PMD_REGISTER_VDEV(net_kni, eth_kni_drv);
516 RTE_PMD_REGISTER_PARAM_STRING(net_kni, ETH_KNI_NO_REQUEST_THREAD_ARG "=<int>");