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 {
42 struct pmd_internals *internals;
43 struct rte_mempool *mb_pool;
45 struct pmd_queue_stats rx;
46 struct pmd_queue_stats tx;
49 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 static int eth_kni_logtype;
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;
83 nb_pkts = rte_kni_rx_burst(kni, bufs, nb_bufs);
85 kni_q->rx.pkts += nb_pkts;
86 kni_q->rx.err_pkts += nb_bufs - nb_pkts;
92 eth_kni_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
94 struct pmd_queue *kni_q = q;
95 struct rte_kni *kni = kni_q->internals->kni;
98 nb_pkts = rte_kni_tx_burst(kni, bufs, nb_bufs);
100 kni_q->tx.pkts += nb_pkts;
101 kni_q->tx.err_pkts += nb_bufs - nb_pkts;
107 kni_handle_request(void *param)
109 struct pmd_internals *internals = param;
112 while (!internals->stop_thread) {
113 rte_kni_handle_request(internals->kni);
121 eth_kni_start(struct rte_eth_dev *dev)
123 struct pmd_internals *internals = dev->data->dev_private;
124 uint16_t port_id = dev->data->port_id;
125 struct rte_mempool *mb_pool;
126 struct rte_kni_conf conf;
127 const char *name = dev->device->name + 4; /* remove net_ */
129 mb_pool = internals->rx_queues[0].mb_pool;
130 strlcpy(conf.name, name, RTE_KNI_NAMESIZE);
132 conf.group_id = port_id;
134 rte_pktmbuf_data_room_size(mb_pool) - RTE_PKTMBUF_HEADROOM;
135 conf.mtu = KNI_ETHER_MTU(conf.mbuf_size);
137 internals->kni = rte_kni_alloc(mb_pool, &conf, NULL);
138 if (internals->kni == NULL) {
140 "Fail to create kni interface for port: %d",
149 eth_kni_dev_start(struct rte_eth_dev *dev)
151 struct pmd_internals *internals = dev->data->dev_private;
154 if (internals->is_kni_started == 0) {
155 ret = eth_kni_start(dev);
158 internals->is_kni_started = 1;
161 if (internals->no_request_thread == 0) {
162 ret = rte_ctrl_thread_create(&internals->thread,
163 "kni_handle_req", NULL,
164 kni_handle_request, internals);
167 "Fail to create kni request thread");
172 dev->data->dev_link.link_status = 1;
178 eth_kni_dev_stop(struct rte_eth_dev *dev)
180 struct pmd_internals *internals = dev->data->dev_private;
183 if (internals->no_request_thread == 0) {
184 internals->stop_thread = 1;
186 ret = pthread_cancel(internals->thread);
188 PMD_LOG(ERR, "Can't cancel the thread");
190 ret = pthread_join(internals->thread, NULL);
192 PMD_LOG(ERR, "Can't join the thread");
194 internals->stop_thread = 0;
197 dev->data->dev_link.link_status = 0;
201 eth_kni_dev_configure(struct rte_eth_dev *dev __rte_unused)
207 eth_kni_dev_info(struct rte_eth_dev *dev __rte_unused,
208 struct rte_eth_dev_info *dev_info)
210 dev_info->max_mac_addrs = 1;
211 dev_info->max_rx_pktlen = UINT32_MAX;
212 dev_info->max_rx_queues = KNI_MAX_QUEUE_PER_PORT;
213 dev_info->max_tx_queues = KNI_MAX_QUEUE_PER_PORT;
214 dev_info->min_rx_bufsize = 0;
218 eth_kni_rx_queue_setup(struct rte_eth_dev *dev,
219 uint16_t rx_queue_id,
220 uint16_t nb_rx_desc __rte_unused,
221 unsigned int socket_id __rte_unused,
222 const struct rte_eth_rxconf *rx_conf __rte_unused,
223 struct rte_mempool *mb_pool)
225 struct pmd_internals *internals = dev->data->dev_private;
228 q = &internals->rx_queues[rx_queue_id];
229 q->internals = internals;
230 q->mb_pool = mb_pool;
232 dev->data->rx_queues[rx_queue_id] = q;
238 eth_kni_tx_queue_setup(struct rte_eth_dev *dev,
239 uint16_t tx_queue_id,
240 uint16_t nb_tx_desc __rte_unused,
241 unsigned int socket_id __rte_unused,
242 const struct rte_eth_txconf *tx_conf __rte_unused)
244 struct pmd_internals *internals = dev->data->dev_private;
247 q = &internals->tx_queues[tx_queue_id];
248 q->internals = internals;
250 dev->data->tx_queues[tx_queue_id] = q;
256 eth_kni_queue_release(void *q __rte_unused)
261 eth_kni_link_update(struct rte_eth_dev *dev __rte_unused,
262 int wait_to_complete __rte_unused)
268 eth_kni_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
270 unsigned long rx_packets_total = 0, rx_bytes_total = 0;
271 unsigned long tx_packets_total = 0, tx_bytes_total = 0;
272 struct rte_eth_dev_data *data = dev->data;
273 unsigned long tx_packets_err_total = 0;
274 unsigned int i, num_stats;
277 num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
279 for (i = 0; i < num_stats; i++) {
280 q = data->rx_queues[i];
281 stats->q_ipackets[i] = q->rx.pkts;
282 stats->q_ibytes[i] = q->rx.bytes;
283 rx_packets_total += stats->q_ipackets[i];
284 rx_bytes_total += stats->q_ibytes[i];
287 num_stats = RTE_MIN((unsigned int)RTE_ETHDEV_QUEUE_STAT_CNTRS,
289 for (i = 0; i < num_stats; i++) {
290 q = data->tx_queues[i];
291 stats->q_opackets[i] = q->tx.pkts;
292 stats->q_obytes[i] = q->tx.bytes;
293 tx_packets_total += stats->q_opackets[i];
294 tx_bytes_total += stats->q_obytes[i];
295 tx_packets_err_total += q->tx.err_pkts;
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 rte_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;
463 name = rte_vdev_device_name(vdev);
464 PMD_LOG(INFO, "Un-Initializing eth_kni for %s", name);
466 /* find the ethdev entry */
467 eth_dev = rte_eth_dev_allocated(name);
471 /* mac_addrs must not be freed alone because part of dev_private */
472 eth_dev->data->mac_addrs = NULL;
474 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
475 return rte_eth_dev_release_port(eth_dev);
477 eth_kni_dev_stop(eth_dev);
479 internals = eth_dev->data->dev_private;
480 ret = rte_kni_release(internals->kni);
482 PMD_LOG(WARNING, "Not able to release kni for %s", name);
484 rte_eth_dev_release_port(eth_dev);
486 is_kni_initialized--;
487 if (is_kni_initialized == 0)
493 static struct rte_vdev_driver eth_kni_drv = {
494 .probe = eth_kni_probe,
495 .remove = eth_kni_remove,
498 RTE_PMD_REGISTER_VDEV(net_kni, eth_kni_drv);
499 RTE_PMD_REGISTER_PARAM_STRING(net_kni, ETH_KNI_NO_REQUEST_THREAD_ARG "=<int>");
501 RTE_INIT(eth_kni_init_log)
503 eth_kni_logtype = rte_log_register("pmd.net.kni");
504 if (eth_kni_logtype >= 0)
505 rte_log_set_level(eth_kni_logtype, RTE_LOG_NOTICE);