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_KNI_PORTS 8
21 #define KNI_ETHER_MTU(mbuf_size) \
22 ((mbuf_size) - ETHER_HDR_LEN) /**< Ethernet MTU. */
24 #define ETH_KNI_NO_REQUEST_THREAD_ARG "no_request_thread"
25 static const char * const valid_arguments[] = {
26 ETH_KNI_NO_REQUEST_THREAD_ARG,
31 int no_request_thread;
34 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 {
54 int no_request_thread;
56 struct ether_addr eth_addr;
58 struct pmd_queue rx_queues[KNI_MAX_QUEUE_PER_PORT];
59 struct pmd_queue tx_queues[KNI_MAX_QUEUE_PER_PORT];
62 static const struct rte_eth_link pmd_link = {
63 .link_speed = ETH_SPEED_NUM_10G,
64 .link_duplex = ETH_LINK_FULL_DUPLEX,
65 .link_status = ETH_LINK_DOWN,
66 .link_autoneg = ETH_LINK_FIXED,
68 static int is_kni_initialized;
70 static int eth_kni_logtype;
72 #define PMD_LOG(level, fmt, args...) \
73 rte_log(RTE_LOG_ ## level, eth_kni_logtype, \
74 "%s(): " fmt "\n", __func__, ##args)
76 eth_kni_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
78 struct pmd_queue *kni_q = q;
79 struct rte_kni *kni = kni_q->internals->kni;
82 nb_pkts = rte_kni_rx_burst(kni, bufs, nb_bufs);
84 kni_q->rx.pkts += nb_pkts;
85 kni_q->rx.err_pkts += nb_bufs - nb_pkts;
91 eth_kni_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
93 struct pmd_queue *kni_q = q;
94 struct rte_kni *kni = kni_q->internals->kni;
97 nb_pkts = rte_kni_tx_burst(kni, bufs, nb_bufs);
99 kni_q->tx.pkts += nb_pkts;
100 kni_q->tx.err_pkts += nb_bufs - nb_pkts;
106 kni_handle_request(void *param)
108 struct pmd_internals *internals = param;
111 while (!internals->stop_thread) {
112 rte_kni_handle_request(internals->kni);
120 eth_kni_start(struct rte_eth_dev *dev)
122 struct pmd_internals *internals = dev->data->dev_private;
123 uint16_t port_id = dev->data->port_id;
124 struct rte_mempool *mb_pool;
125 struct rte_kni_conf conf;
126 const char *name = dev->device->name + 4; /* remove net_ */
128 mb_pool = internals->rx_queues[0].mb_pool;
129 snprintf(conf.name, RTE_KNI_NAMESIZE, "%s", name);
131 conf.group_id = port_id;
133 rte_pktmbuf_data_room_size(mb_pool) - RTE_PKTMBUF_HEADROOM;
134 conf.mtu = KNI_ETHER_MTU(conf.mbuf_size);
136 internals->kni = rte_kni_alloc(mb_pool, &conf, NULL);
137 if (internals->kni == NULL) {
139 "Fail to create kni interface for port: %d",
148 eth_kni_dev_start(struct rte_eth_dev *dev)
150 struct pmd_internals *internals = dev->data->dev_private;
153 if (internals->is_kni_started == 0) {
154 ret = eth_kni_start(dev);
157 internals->is_kni_started = 1;
160 if (internals->no_request_thread == 0) {
161 ret = rte_ctrl_thread_create(&internals->thread,
162 "kni_handle_req", NULL,
163 kni_handle_request, internals);
166 "Fail to create kni request thread");
171 dev->data->dev_link.link_status = 1;
177 eth_kni_dev_stop(struct rte_eth_dev *dev)
179 struct pmd_internals *internals = dev->data->dev_private;
182 if (internals->no_request_thread == 0) {
183 internals->stop_thread = 1;
185 ret = pthread_cancel(internals->thread);
187 PMD_LOG(ERR, "Can't cancel the thread");
189 ret = pthread_join(internals->thread, NULL);
191 PMD_LOG(ERR, "Can't join the thread");
193 internals->stop_thread = 0;
196 dev->data->dev_link.link_status = 0;
200 eth_kni_dev_configure(struct rte_eth_dev *dev __rte_unused)
206 eth_kni_dev_info(struct rte_eth_dev *dev __rte_unused,
207 struct rte_eth_dev_info *dev_info)
209 dev_info->max_mac_addrs = 1;
210 dev_info->max_rx_pktlen = UINT32_MAX;
211 dev_info->max_rx_queues = KNI_MAX_QUEUE_PER_PORT;
212 dev_info->max_tx_queues = KNI_MAX_QUEUE_PER_PORT;
213 dev_info->min_rx_bufsize = 0;
217 eth_kni_rx_queue_setup(struct rte_eth_dev *dev,
218 uint16_t rx_queue_id,
219 uint16_t nb_rx_desc __rte_unused,
220 unsigned int socket_id __rte_unused,
221 const struct rte_eth_rxconf *rx_conf __rte_unused,
222 struct rte_mempool *mb_pool)
224 struct pmd_internals *internals = dev->data->dev_private;
227 q = &internals->rx_queues[rx_queue_id];
228 q->internals = internals;
229 q->mb_pool = mb_pool;
231 dev->data->rx_queues[rx_queue_id] = q;
237 eth_kni_tx_queue_setup(struct rte_eth_dev *dev,
238 uint16_t tx_queue_id,
239 uint16_t nb_tx_desc __rte_unused,
240 unsigned int socket_id __rte_unused,
241 const struct rte_eth_txconf *tx_conf __rte_unused)
243 struct pmd_internals *internals = dev->data->dev_private;
246 q = &internals->tx_queues[tx_queue_id];
247 q->internals = internals;
249 dev->data->tx_queues[tx_queue_id] = q;
255 eth_kni_queue_release(void *q __rte_unused)
260 eth_kni_link_update(struct rte_eth_dev *dev __rte_unused,
261 int wait_to_complete __rte_unused)
267 eth_kni_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
269 unsigned long rx_packets_total = 0, rx_bytes_total = 0;
270 unsigned long tx_packets_total = 0, tx_bytes_total = 0;
271 struct rte_eth_dev_data *data = dev->data;
272 unsigned long tx_packets_err_total = 0;
273 unsigned int i, num_stats;
276 num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
278 for (i = 0; i < num_stats; i++) {
279 q = data->rx_queues[i];
280 stats->q_ipackets[i] = q->rx.pkts;
281 stats->q_ibytes[i] = q->rx.bytes;
282 rx_packets_total += stats->q_ipackets[i];
283 rx_bytes_total += stats->q_ibytes[i];
286 num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
288 for (i = 0; i < num_stats; i++) {
289 q = data->tx_queues[i];
290 stats->q_opackets[i] = q->tx.pkts;
291 stats->q_obytes[i] = q->tx.bytes;
292 stats->q_errors[i] = q->tx.err_pkts;
293 tx_packets_total += stats->q_opackets[i];
294 tx_bytes_total += stats->q_obytes[i];
295 tx_packets_err_total += stats->q_errors[i];
298 stats->ipackets = rx_packets_total;
299 stats->ibytes = rx_bytes_total;
300 stats->opackets = tx_packets_total;
301 stats->obytes = tx_bytes_total;
302 stats->oerrors = tx_packets_err_total;
308 eth_kni_stats_reset(struct rte_eth_dev *dev)
310 struct rte_eth_dev_data *data = dev->data;
314 for (i = 0; i < data->nb_rx_queues; i++) {
315 q = data->rx_queues[i];
319 for (i = 0; i < data->nb_tx_queues; i++) {
320 q = data->tx_queues[i];
327 static const struct eth_dev_ops eth_kni_ops = {
328 .dev_start = eth_kni_dev_start,
329 .dev_stop = eth_kni_dev_stop,
330 .dev_configure = eth_kni_dev_configure,
331 .dev_infos_get = eth_kni_dev_info,
332 .rx_queue_setup = eth_kni_rx_queue_setup,
333 .tx_queue_setup = eth_kni_tx_queue_setup,
334 .rx_queue_release = eth_kni_queue_release,
335 .tx_queue_release = eth_kni_queue_release,
336 .link_update = eth_kni_link_update,
337 .stats_get = eth_kni_stats_get,
338 .stats_reset = eth_kni_stats_reset,
341 static struct rte_eth_dev *
342 eth_kni_create(struct rte_vdev_device *vdev,
343 struct eth_kni_args *args,
344 unsigned int numa_node)
346 struct pmd_internals *internals;
347 struct rte_eth_dev_data *data;
348 struct rte_eth_dev *eth_dev;
350 PMD_LOG(INFO, "Creating kni ethdev on numa socket %u",
353 /* reserve an ethdev entry */
354 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*internals));
358 internals = eth_dev->data->dev_private;
359 data = eth_dev->data;
360 data->nb_rx_queues = 1;
361 data->nb_tx_queues = 1;
362 data->dev_link = pmd_link;
363 data->mac_addrs = &internals->eth_addr;
365 eth_random_addr(internals->eth_addr.addr_bytes);
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 PMD_LOG(INFO, "Initializing eth_kni for %s", name);
417 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
418 eth_dev = rte_eth_dev_attach_secondary(name);
420 PMD_LOG(ERR, "Failed to probe %s", name);
423 /* TODO: request info from primary to set up Rx and Tx */
424 eth_dev->dev_ops = ð_kni_ops;
425 eth_dev->device = &vdev->device;
426 rte_eth_dev_probing_finish(eth_dev);
430 ret = eth_kni_kvargs_process(&args, params);
438 eth_dev = eth_kni_create(vdev, &args, rte_socket_id());
442 eth_dev->rx_pkt_burst = eth_kni_rx;
443 eth_dev->tx_pkt_burst = eth_kni_tx;
445 rte_eth_dev_probing_finish(eth_dev);
449 is_kni_initialized--;
450 if (is_kni_initialized == 0)
456 eth_kni_remove(struct rte_vdev_device *vdev)
458 struct rte_eth_dev *eth_dev;
459 struct pmd_internals *internals;
462 name = rte_vdev_device_name(vdev);
463 PMD_LOG(INFO, "Un-Initializing eth_kni for %s", name);
465 /* find the ethdev entry */
466 eth_dev = rte_eth_dev_allocated(name);
470 /* mac_addrs must not be freed alone because part of dev_private */
471 eth_dev->data->mac_addrs = NULL;
473 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
474 return rte_eth_dev_release_port(eth_dev);
476 eth_kni_dev_stop(eth_dev);
478 internals = eth_dev->data->dev_private;
479 rte_kni_release(internals->kni);
481 rte_eth_dev_release_port(eth_dev);
483 is_kni_initialized--;
484 if (is_kni_initialized == 0)
490 static struct rte_vdev_driver eth_kni_drv = {
491 .probe = eth_kni_probe,
492 .remove = eth_kni_remove,
495 RTE_PMD_REGISTER_VDEV(net_kni, eth_kni_drv);
496 RTE_PMD_REGISTER_PARAM_STRING(net_kni, ETH_KNI_NO_REQUEST_THREAD_ARG "=<int>");
498 RTE_INIT(eth_kni_init_log)
500 eth_kni_logtype = rte_log_register("pmd.net.kni");
501 if (eth_kni_logtype >= 0)
502 rte_log_set_level(eth_kni_logtype, RTE_LOG_NOTICE);