1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Intel Corporation
9 #include <rte_ethdev_driver.h>
10 #include <rte_ethdev_vdev.h>
12 #include <rte_kvargs.h>
13 #include <rte_malloc.h>
14 #include <rte_bus_vdev.h>
16 /* Only single queue supported */
17 #define KNI_MAX_QUEUE_PER_PORT 1
19 #define MAX_PACKET_SZ 2048
20 #define MAX_KNI_PORTS 8
22 #define ETH_KNI_NO_REQUEST_THREAD_ARG "no_request_thread"
23 static const char * const valid_arguments[] = {
24 ETH_KNI_NO_REQUEST_THREAD_ARG,
29 int no_request_thread;
32 struct pmd_queue_stats {
39 struct pmd_internals *internals;
40 struct rte_mempool *mb_pool;
42 struct pmd_queue_stats rx;
43 struct pmd_queue_stats tx;
46 struct pmd_internals {
52 int no_request_thread;
54 struct ether_addr eth_addr;
56 struct pmd_queue rx_queues[KNI_MAX_QUEUE_PER_PORT];
57 struct pmd_queue tx_queues[KNI_MAX_QUEUE_PER_PORT];
60 static const struct rte_eth_link pmd_link = {
61 .link_speed = ETH_SPEED_NUM_10G,
62 .link_duplex = ETH_LINK_FULL_DUPLEX,
63 .link_status = ETH_LINK_DOWN,
64 .link_autoneg = ETH_LINK_AUTONEG,
66 static int is_kni_initialized;
69 eth_kni_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
71 struct pmd_queue *kni_q = q;
72 struct rte_kni *kni = kni_q->internals->kni;
75 nb_pkts = rte_kni_rx_burst(kni, bufs, nb_bufs);
77 kni_q->rx.pkts += nb_pkts;
78 kni_q->rx.err_pkts += nb_bufs - nb_pkts;
84 eth_kni_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
86 struct pmd_queue *kni_q = q;
87 struct rte_kni *kni = kni_q->internals->kni;
90 nb_pkts = rte_kni_tx_burst(kni, bufs, nb_bufs);
92 kni_q->tx.pkts += nb_pkts;
93 kni_q->tx.err_pkts += nb_bufs - nb_pkts;
99 kni_handle_request(void *param)
101 struct pmd_internals *internals = param;
104 while (!internals->stop_thread) {
105 rte_kni_handle_request(internals->kni);
113 eth_kni_start(struct rte_eth_dev *dev)
115 struct pmd_internals *internals = dev->data->dev_private;
116 uint16_t port_id = dev->data->port_id;
117 struct rte_mempool *mb_pool;
118 struct rte_kni_conf conf;
119 const char *name = dev->device->name + 4; /* remove net_ */
121 snprintf(conf.name, RTE_KNI_NAMESIZE, "%s", name);
123 conf.group_id = port_id;
124 conf.mbuf_size = MAX_PACKET_SZ;
125 mb_pool = internals->rx_queues[0].mb_pool;
127 internals->kni = rte_kni_alloc(mb_pool, &conf, NULL);
128 if (internals->kni == NULL) {
130 "Fail to create kni interface for port: %d\n",
139 eth_kni_dev_start(struct rte_eth_dev *dev)
141 struct pmd_internals *internals = dev->data->dev_private;
144 if (internals->is_kni_started == 0) {
145 ret = eth_kni_start(dev);
148 internals->is_kni_started = 1;
151 if (internals->no_request_thread == 0) {
152 ret = pthread_create(&internals->thread, NULL,
153 kni_handle_request, internals);
156 "Fail to create kni request thread\n");
161 dev->data->dev_link.link_status = 1;
167 eth_kni_dev_stop(struct rte_eth_dev *dev)
169 struct pmd_internals *internals = dev->data->dev_private;
172 if (internals->no_request_thread == 0) {
173 internals->stop_thread = 1;
175 ret = pthread_cancel(internals->thread);
177 RTE_LOG(ERR, PMD, "Can't cancel the thread\n");
179 ret = pthread_join(internals->thread, NULL);
181 RTE_LOG(ERR, PMD, "Can't join the thread\n");
183 internals->stop_thread = 0;
186 dev->data->dev_link.link_status = 0;
190 eth_kni_dev_configure(struct rte_eth_dev *dev __rte_unused)
196 eth_kni_dev_info(struct rte_eth_dev *dev __rte_unused,
197 struct rte_eth_dev_info *dev_info)
199 dev_info->max_mac_addrs = 1;
200 dev_info->max_rx_pktlen = UINT32_MAX;
201 dev_info->max_rx_queues = KNI_MAX_QUEUE_PER_PORT;
202 dev_info->max_tx_queues = KNI_MAX_QUEUE_PER_PORT;
203 dev_info->min_rx_bufsize = 0;
204 dev_info->pci_dev = NULL;
208 eth_kni_rx_queue_setup(struct rte_eth_dev *dev,
209 uint16_t rx_queue_id,
210 uint16_t nb_rx_desc __rte_unused,
211 unsigned int socket_id __rte_unused,
212 const struct rte_eth_rxconf *rx_conf __rte_unused,
213 struct rte_mempool *mb_pool)
215 struct pmd_internals *internals = dev->data->dev_private;
218 q = &internals->rx_queues[rx_queue_id];
219 q->internals = internals;
220 q->mb_pool = mb_pool;
222 dev->data->rx_queues[rx_queue_id] = q;
228 eth_kni_tx_queue_setup(struct rte_eth_dev *dev,
229 uint16_t tx_queue_id,
230 uint16_t nb_tx_desc __rte_unused,
231 unsigned int socket_id __rte_unused,
232 const struct rte_eth_txconf *tx_conf __rte_unused)
234 struct pmd_internals *internals = dev->data->dev_private;
237 q = &internals->tx_queues[tx_queue_id];
238 q->internals = internals;
240 dev->data->tx_queues[tx_queue_id] = q;
246 eth_kni_queue_release(void *q __rte_unused)
251 eth_kni_link_update(struct rte_eth_dev *dev __rte_unused,
252 int wait_to_complete __rte_unused)
258 eth_kni_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
260 unsigned long rx_packets_total = 0, rx_bytes_total = 0;
261 unsigned long tx_packets_total = 0, tx_bytes_total = 0;
262 struct rte_eth_dev_data *data = dev->data;
263 unsigned long tx_packets_err_total = 0;
264 unsigned int i, num_stats;
267 num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
269 for (i = 0; i < num_stats; i++) {
270 q = data->rx_queues[i];
271 stats->q_ipackets[i] = q->rx.pkts;
272 stats->q_ibytes[i] = q->rx.bytes;
273 rx_packets_total += stats->q_ipackets[i];
274 rx_bytes_total += stats->q_ibytes[i];
277 num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
279 for (i = 0; i < num_stats; i++) {
280 q = data->tx_queues[i];
281 stats->q_opackets[i] = q->tx.pkts;
282 stats->q_obytes[i] = q->tx.bytes;
283 stats->q_errors[i] = q->tx.err_pkts;
284 tx_packets_total += stats->q_opackets[i];
285 tx_bytes_total += stats->q_obytes[i];
286 tx_packets_err_total += stats->q_errors[i];
289 stats->ipackets = rx_packets_total;
290 stats->ibytes = rx_bytes_total;
291 stats->opackets = tx_packets_total;
292 stats->obytes = tx_bytes_total;
293 stats->oerrors = tx_packets_err_total;
299 eth_kni_stats_reset(struct rte_eth_dev *dev)
301 struct rte_eth_dev_data *data = dev->data;
305 for (i = 0; i < data->nb_rx_queues; i++) {
306 q = data->rx_queues[i];
310 for (i = 0; i < data->nb_tx_queues; i++) {
311 q = data->tx_queues[i];
318 static const struct eth_dev_ops eth_kni_ops = {
319 .dev_start = eth_kni_dev_start,
320 .dev_stop = eth_kni_dev_stop,
321 .dev_configure = eth_kni_dev_configure,
322 .dev_infos_get = eth_kni_dev_info,
323 .rx_queue_setup = eth_kni_rx_queue_setup,
324 .tx_queue_setup = eth_kni_tx_queue_setup,
325 .rx_queue_release = eth_kni_queue_release,
326 .tx_queue_release = eth_kni_queue_release,
327 .link_update = eth_kni_link_update,
328 .stats_get = eth_kni_stats_get,
329 .stats_reset = eth_kni_stats_reset,
332 static struct rte_eth_dev *
333 eth_kni_create(struct rte_vdev_device *vdev,
334 struct eth_kni_args *args,
335 unsigned int numa_node)
337 struct pmd_internals *internals;
338 struct rte_eth_dev_data *data;
339 struct rte_eth_dev *eth_dev;
342 RTE_LOG(INFO, PMD, "Creating kni ethdev on numa socket %u\n",
345 name = rte_vdev_device_name(vdev);
346 data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
350 /* reserve an ethdev entry */
351 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*internals));
352 if (eth_dev == NULL) {
357 internals = eth_dev->data->dev_private;
358 rte_memcpy(data, eth_dev->data, sizeof(*data));
359 data->nb_rx_queues = 1;
360 data->nb_tx_queues = 1;
361 data->dev_link = pmd_link;
362 data->mac_addrs = &internals->eth_addr;
364 eth_random_addr(internals->eth_addr.addr_bytes);
366 eth_dev->data = data;
367 eth_dev->dev_ops = ð_kni_ops;
369 internals->no_request_thread = args->no_request_thread;
377 if (is_kni_initialized == 0)
378 rte_kni_init(MAX_KNI_PORTS);
380 is_kni_initialized++;
386 eth_kni_kvargs_process(struct eth_kni_args *args, const char *params)
388 struct rte_kvargs *kvlist;
390 kvlist = rte_kvargs_parse(params, valid_arguments);
394 memset(args, 0, sizeof(struct eth_kni_args));
396 if (rte_kvargs_count(kvlist, ETH_KNI_NO_REQUEST_THREAD_ARG) == 1)
397 args->no_request_thread = 1;
399 rte_kvargs_free(kvlist);
405 eth_kni_probe(struct rte_vdev_device *vdev)
407 struct rte_eth_dev *eth_dev;
408 struct eth_kni_args args;
413 name = rte_vdev_device_name(vdev);
414 params = rte_vdev_device_args(vdev);
415 RTE_LOG(INFO, PMD, "Initializing eth_kni for %s\n", name);
417 ret = eth_kni_kvargs_process(&args, params);
425 eth_dev = eth_kni_create(vdev, &args, rte_socket_id());
429 eth_dev->rx_pkt_burst = eth_kni_rx;
430 eth_dev->tx_pkt_burst = eth_kni_tx;
435 is_kni_initialized--;
436 if (is_kni_initialized == 0)
442 eth_kni_remove(struct rte_vdev_device *vdev)
444 struct rte_eth_dev *eth_dev;
445 struct pmd_internals *internals;
448 name = rte_vdev_device_name(vdev);
449 RTE_LOG(INFO, PMD, "Un-Initializing eth_kni for %s\n", name);
451 /* find the ethdev entry */
452 eth_dev = rte_eth_dev_allocated(name);
456 eth_kni_dev_stop(eth_dev);
458 internals = eth_dev->data->dev_private;
459 rte_kni_release(internals->kni);
462 rte_free(eth_dev->data);
464 rte_eth_dev_release_port(eth_dev);
466 is_kni_initialized--;
467 if (is_kni_initialized == 0)
473 static struct rte_vdev_driver eth_kni_drv = {
474 .probe = eth_kni_probe,
475 .remove = eth_kni_remove,
478 RTE_PMD_REGISTER_VDEV(net_kni, eth_kni_drv);
479 RTE_PMD_REGISTER_PARAM_STRING(net_kni, ETH_KNI_NO_REQUEST_THREAD_ARG "=<int>");