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[ceph.git] / ceph / src / spdk / dpdk / drivers / net / vhost / rte_eth_vhost.c
1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2016 IGEL Co., Ltd.
3 * Copyright(c) 2016-2018 Intel Corporation
4 */
5 #include <unistd.h>
6 #include <pthread.h>
7 #include <stdbool.h>
8
9 #include <rte_mbuf.h>
10 #include <rte_ethdev_driver.h>
11 #include <rte_ethdev_vdev.h>
12 #include <rte_malloc.h>
13 #include <rte_memcpy.h>
14 #include <rte_bus_vdev.h>
15 #include <rte_kvargs.h>
16 #include <rte_vhost.h>
17 #include <rte_spinlock.h>
18
19 #include "rte_eth_vhost.h"
20
21 static int vhost_logtype;
22
23 #define VHOST_LOG(level, ...) \
24 rte_log(RTE_LOG_ ## level, vhost_logtype, __VA_ARGS__)
25
26 enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
27
28 #define ETH_VHOST_IFACE_ARG "iface"
29 #define ETH_VHOST_QUEUES_ARG "queues"
30 #define ETH_VHOST_CLIENT_ARG "client"
31 #define ETH_VHOST_DEQUEUE_ZERO_COPY "dequeue-zero-copy"
32 #define ETH_VHOST_IOMMU_SUPPORT "iommu-support"
33 #define ETH_VHOST_POSTCOPY_SUPPORT "postcopy-support"
34 #define VHOST_MAX_PKT_BURST 32
35
36 static const char *valid_arguments[] = {
37 ETH_VHOST_IFACE_ARG,
38 ETH_VHOST_QUEUES_ARG,
39 ETH_VHOST_CLIENT_ARG,
40 ETH_VHOST_DEQUEUE_ZERO_COPY,
41 ETH_VHOST_IOMMU_SUPPORT,
42 ETH_VHOST_POSTCOPY_SUPPORT,
43 NULL
44 };
45
46 static struct ether_addr base_eth_addr = {
47 .addr_bytes = {
48 0x56 /* V */,
49 0x48 /* H */,
50 0x4F /* O */,
51 0x53 /* S */,
52 0x54 /* T */,
53 0x00
54 }
55 };
56
57 enum vhost_xstats_pkts {
58 VHOST_UNDERSIZE_PKT = 0,
59 VHOST_64_PKT,
60 VHOST_65_TO_127_PKT,
61 VHOST_128_TO_255_PKT,
62 VHOST_256_TO_511_PKT,
63 VHOST_512_TO_1023_PKT,
64 VHOST_1024_TO_1522_PKT,
65 VHOST_1523_TO_MAX_PKT,
66 VHOST_BROADCAST_PKT,
67 VHOST_MULTICAST_PKT,
68 VHOST_UNICAST_PKT,
69 VHOST_ERRORS_PKT,
70 VHOST_ERRORS_FRAGMENTED,
71 VHOST_ERRORS_JABBER,
72 VHOST_UNKNOWN_PROTOCOL,
73 VHOST_XSTATS_MAX,
74 };
75
76 struct vhost_stats {
77 uint64_t pkts;
78 uint64_t bytes;
79 uint64_t missed_pkts;
80 uint64_t xstats[VHOST_XSTATS_MAX];
81 };
82
83 struct vhost_queue {
84 int vid;
85 rte_atomic32_t allow_queuing;
86 rte_atomic32_t while_queuing;
87 struct pmd_internal *internal;
88 struct rte_mempool *mb_pool;
89 uint16_t port;
90 uint16_t virtqueue_id;
91 struct vhost_stats stats;
92 };
93
94 struct pmd_internal {
95 rte_atomic32_t dev_attached;
96 char *dev_name;
97 char *iface_name;
98 uint16_t max_queues;
99 int vid;
100 rte_atomic32_t started;
101 uint8_t vlan_strip;
102 };
103
104 struct internal_list {
105 TAILQ_ENTRY(internal_list) next;
106 struct rte_eth_dev *eth_dev;
107 };
108
109 TAILQ_HEAD(internal_list_head, internal_list);
110 static struct internal_list_head internal_list =
111 TAILQ_HEAD_INITIALIZER(internal_list);
112
113 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
114
115 static struct rte_eth_link pmd_link = {
116 .link_speed = 10000,
117 .link_duplex = ETH_LINK_FULL_DUPLEX,
118 .link_status = ETH_LINK_DOWN
119 };
120
121 struct rte_vhost_vring_state {
122 rte_spinlock_t lock;
123
124 bool cur[RTE_MAX_QUEUES_PER_PORT * 2];
125 bool seen[RTE_MAX_QUEUES_PER_PORT * 2];
126 unsigned int index;
127 unsigned int max_vring;
128 };
129
130 static struct rte_vhost_vring_state *vring_states[RTE_MAX_ETHPORTS];
131
132 #define VHOST_XSTATS_NAME_SIZE 64
133
134 struct vhost_xstats_name_off {
135 char name[VHOST_XSTATS_NAME_SIZE];
136 uint64_t offset;
137 };
138
139 /* [rx]_is prepended to the name string here */
140 static const struct vhost_xstats_name_off vhost_rxport_stat_strings[] = {
141 {"good_packets",
142 offsetof(struct vhost_queue, stats.pkts)},
143 {"total_bytes",
144 offsetof(struct vhost_queue, stats.bytes)},
145 {"missed_pkts",
146 offsetof(struct vhost_queue, stats.missed_pkts)},
147 {"broadcast_packets",
148 offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
149 {"multicast_packets",
150 offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
151 {"unicast_packets",
152 offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
153 {"undersize_packets",
154 offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
155 {"size_64_packets",
156 offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
157 {"size_65_to_127_packets",
158 offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
159 {"size_128_to_255_packets",
160 offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
161 {"size_256_to_511_packets",
162 offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
163 {"size_512_to_1023_packets",
164 offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
165 {"size_1024_to_1522_packets",
166 offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
167 {"size_1523_to_max_packets",
168 offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
169 {"errors_with_bad_CRC",
170 offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
171 {"fragmented_errors",
172 offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_FRAGMENTED])},
173 {"jabber_errors",
174 offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_JABBER])},
175 {"unknown_protos_packets",
176 offsetof(struct vhost_queue, stats.xstats[VHOST_UNKNOWN_PROTOCOL])},
177 };
178
179 /* [tx]_ is prepended to the name string here */
180 static const struct vhost_xstats_name_off vhost_txport_stat_strings[] = {
181 {"good_packets",
182 offsetof(struct vhost_queue, stats.pkts)},
183 {"total_bytes",
184 offsetof(struct vhost_queue, stats.bytes)},
185 {"missed_pkts",
186 offsetof(struct vhost_queue, stats.missed_pkts)},
187 {"broadcast_packets",
188 offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
189 {"multicast_packets",
190 offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
191 {"unicast_packets",
192 offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
193 {"undersize_packets",
194 offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
195 {"size_64_packets",
196 offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
197 {"size_65_to_127_packets",
198 offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
199 {"size_128_to_255_packets",
200 offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
201 {"size_256_to_511_packets",
202 offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
203 {"size_512_to_1023_packets",
204 offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
205 {"size_1024_to_1522_packets",
206 offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
207 {"size_1523_to_max_packets",
208 offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
209 {"errors_with_bad_CRC",
210 offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
211 };
212
213 #define VHOST_NB_XSTATS_RXPORT (sizeof(vhost_rxport_stat_strings) / \
214 sizeof(vhost_rxport_stat_strings[0]))
215
216 #define VHOST_NB_XSTATS_TXPORT (sizeof(vhost_txport_stat_strings) / \
217 sizeof(vhost_txport_stat_strings[0]))
218
219 static void
220 vhost_dev_xstats_reset(struct rte_eth_dev *dev)
221 {
222 struct vhost_queue *vq = NULL;
223 unsigned int i = 0;
224
225 for (i = 0; i < dev->data->nb_rx_queues; i++) {
226 vq = dev->data->rx_queues[i];
227 if (!vq)
228 continue;
229 memset(&vq->stats, 0, sizeof(vq->stats));
230 }
231 for (i = 0; i < dev->data->nb_tx_queues; i++) {
232 vq = dev->data->tx_queues[i];
233 if (!vq)
234 continue;
235 memset(&vq->stats, 0, sizeof(vq->stats));
236 }
237 }
238
239 static int
240 vhost_dev_xstats_get_names(struct rte_eth_dev *dev __rte_unused,
241 struct rte_eth_xstat_name *xstats_names,
242 unsigned int limit __rte_unused)
243 {
244 unsigned int t = 0;
245 int count = 0;
246 int nstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
247
248 if (!xstats_names)
249 return nstats;
250 for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
251 snprintf(xstats_names[count].name,
252 sizeof(xstats_names[count].name),
253 "rx_%s", vhost_rxport_stat_strings[t].name);
254 count++;
255 }
256 for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
257 snprintf(xstats_names[count].name,
258 sizeof(xstats_names[count].name),
259 "tx_%s", vhost_txport_stat_strings[t].name);
260 count++;
261 }
262 return count;
263 }
264
265 static int
266 vhost_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
267 unsigned int n)
268 {
269 unsigned int i;
270 unsigned int t;
271 unsigned int count = 0;
272 struct vhost_queue *vq = NULL;
273 unsigned int nxstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
274
275 if (n < nxstats)
276 return nxstats;
277
278 for (i = 0; i < dev->data->nb_rx_queues; i++) {
279 vq = dev->data->rx_queues[i];
280 if (!vq)
281 continue;
282 vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
283 - (vq->stats.xstats[VHOST_BROADCAST_PKT]
284 + vq->stats.xstats[VHOST_MULTICAST_PKT]);
285 }
286 for (i = 0; i < dev->data->nb_tx_queues; i++) {
287 vq = dev->data->tx_queues[i];
288 if (!vq)
289 continue;
290 vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
291 + vq->stats.missed_pkts
292 - (vq->stats.xstats[VHOST_BROADCAST_PKT]
293 + vq->stats.xstats[VHOST_MULTICAST_PKT]);
294 }
295 for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
296 xstats[count].value = 0;
297 for (i = 0; i < dev->data->nb_rx_queues; i++) {
298 vq = dev->data->rx_queues[i];
299 if (!vq)
300 continue;
301 xstats[count].value +=
302 *(uint64_t *)(((char *)vq)
303 + vhost_rxport_stat_strings[t].offset);
304 }
305 xstats[count].id = count;
306 count++;
307 }
308 for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
309 xstats[count].value = 0;
310 for (i = 0; i < dev->data->nb_tx_queues; i++) {
311 vq = dev->data->tx_queues[i];
312 if (!vq)
313 continue;
314 xstats[count].value +=
315 *(uint64_t *)(((char *)vq)
316 + vhost_txport_stat_strings[t].offset);
317 }
318 xstats[count].id = count;
319 count++;
320 }
321 return count;
322 }
323
324 static inline void
325 vhost_count_multicast_broadcast(struct vhost_queue *vq,
326 struct rte_mbuf *mbuf)
327 {
328 struct ether_addr *ea = NULL;
329 struct vhost_stats *pstats = &vq->stats;
330
331 ea = rte_pktmbuf_mtod(mbuf, struct ether_addr *);
332 if (is_multicast_ether_addr(ea)) {
333 if (is_broadcast_ether_addr(ea))
334 pstats->xstats[VHOST_BROADCAST_PKT]++;
335 else
336 pstats->xstats[VHOST_MULTICAST_PKT]++;
337 }
338 }
339
340 static void
341 vhost_update_packet_xstats(struct vhost_queue *vq,
342 struct rte_mbuf **bufs,
343 uint16_t count)
344 {
345 uint32_t pkt_len = 0;
346 uint64_t i = 0;
347 uint64_t index;
348 struct vhost_stats *pstats = &vq->stats;
349
350 for (i = 0; i < count ; i++) {
351 pkt_len = bufs[i]->pkt_len;
352 if (pkt_len == 64) {
353 pstats->xstats[VHOST_64_PKT]++;
354 } else if (pkt_len > 64 && pkt_len < 1024) {
355 index = (sizeof(pkt_len) * 8)
356 - __builtin_clz(pkt_len) - 5;
357 pstats->xstats[index]++;
358 } else {
359 if (pkt_len < 64)
360 pstats->xstats[VHOST_UNDERSIZE_PKT]++;
361 else if (pkt_len <= 1522)
362 pstats->xstats[VHOST_1024_TO_1522_PKT]++;
363 else if (pkt_len > 1522)
364 pstats->xstats[VHOST_1523_TO_MAX_PKT]++;
365 }
366 vhost_count_multicast_broadcast(vq, bufs[i]);
367 }
368 }
369
370 static uint16_t
371 eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
372 {
373 struct vhost_queue *r = q;
374 uint16_t i, nb_rx = 0;
375 uint16_t nb_receive = nb_bufs;
376
377 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
378 return 0;
379
380 rte_atomic32_set(&r->while_queuing, 1);
381
382 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
383 goto out;
384
385 /* Dequeue packets from guest TX queue */
386 while (nb_receive) {
387 uint16_t nb_pkts;
388 uint16_t num = (uint16_t)RTE_MIN(nb_receive,
389 VHOST_MAX_PKT_BURST);
390
391 nb_pkts = rte_vhost_dequeue_burst(r->vid, r->virtqueue_id,
392 r->mb_pool, &bufs[nb_rx],
393 num);
394
395 nb_rx += nb_pkts;
396 nb_receive -= nb_pkts;
397 if (nb_pkts < num)
398 break;
399 }
400
401 r->stats.pkts += nb_rx;
402
403 for (i = 0; likely(i < nb_rx); i++) {
404 bufs[i]->port = r->port;
405 bufs[i]->vlan_tci = 0;
406
407 if (r->internal->vlan_strip)
408 rte_vlan_strip(bufs[i]);
409
410 r->stats.bytes += bufs[i]->pkt_len;
411 }
412
413 vhost_update_packet_xstats(r, bufs, nb_rx);
414
415 out:
416 rte_atomic32_set(&r->while_queuing, 0);
417
418 return nb_rx;
419 }
420
421 static uint16_t
422 eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
423 {
424 struct vhost_queue *r = q;
425 uint16_t i, nb_tx = 0;
426 uint16_t nb_send = 0;
427
428 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
429 return 0;
430
431 rte_atomic32_set(&r->while_queuing, 1);
432
433 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
434 goto out;
435
436 for (i = 0; i < nb_bufs; i++) {
437 struct rte_mbuf *m = bufs[i];
438
439 /* Do VLAN tag insertion */
440 if (m->ol_flags & PKT_TX_VLAN_PKT) {
441 int error = rte_vlan_insert(&m);
442 if (unlikely(error)) {
443 rte_pktmbuf_free(m);
444 continue;
445 }
446 }
447
448 bufs[nb_send] = m;
449 ++nb_send;
450 }
451
452 /* Enqueue packets to guest RX queue */
453 while (nb_send) {
454 uint16_t nb_pkts;
455 uint16_t num = (uint16_t)RTE_MIN(nb_send,
456 VHOST_MAX_PKT_BURST);
457
458 nb_pkts = rte_vhost_enqueue_burst(r->vid, r->virtqueue_id,
459 &bufs[nb_tx], num);
460
461 nb_tx += nb_pkts;
462 nb_send -= nb_pkts;
463 if (nb_pkts < num)
464 break;
465 }
466
467 r->stats.pkts += nb_tx;
468 r->stats.missed_pkts += nb_bufs - nb_tx;
469
470 for (i = 0; likely(i < nb_tx); i++)
471 r->stats.bytes += bufs[i]->pkt_len;
472
473 vhost_update_packet_xstats(r, bufs, nb_tx);
474
475 /* According to RFC2863 page42 section ifHCOutMulticastPkts and
476 * ifHCOutBroadcastPkts, the counters "multicast" and "broadcast"
477 * are increased when packets are not transmitted successfully.
478 */
479 for (i = nb_tx; i < nb_bufs; i++)
480 vhost_count_multicast_broadcast(r, bufs[i]);
481
482 for (i = 0; likely(i < nb_tx); i++)
483 rte_pktmbuf_free(bufs[i]);
484 out:
485 rte_atomic32_set(&r->while_queuing, 0);
486
487 return nb_tx;
488 }
489
490 static int
491 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
492 {
493 struct pmd_internal *internal = dev->data->dev_private;
494 const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
495
496 internal->vlan_strip = !!(rxmode->offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
497
498 return 0;
499 }
500
501 static inline struct internal_list *
502 find_internal_resource(char *ifname)
503 {
504 int found = 0;
505 struct internal_list *list;
506 struct pmd_internal *internal;
507
508 if (ifname == NULL)
509 return NULL;
510
511 pthread_mutex_lock(&internal_list_lock);
512
513 TAILQ_FOREACH(list, &internal_list, next) {
514 internal = list->eth_dev->data->dev_private;
515 if (!strcmp(internal->iface_name, ifname)) {
516 found = 1;
517 break;
518 }
519 }
520
521 pthread_mutex_unlock(&internal_list_lock);
522
523 if (!found)
524 return NULL;
525
526 return list;
527 }
528
529 static int
530 eth_rxq_intr_enable(struct rte_eth_dev *dev, uint16_t qid)
531 {
532 struct rte_vhost_vring vring;
533 struct vhost_queue *vq;
534 int ret = 0;
535
536 vq = dev->data->rx_queues[qid];
537 if (!vq) {
538 VHOST_LOG(ERR, "rxq%d is not setup yet\n", qid);
539 return -1;
540 }
541
542 ret = rte_vhost_get_vhost_vring(vq->vid, (qid << 1) + 1, &vring);
543 if (ret < 0) {
544 VHOST_LOG(ERR, "Failed to get rxq%d's vring\n", qid);
545 return ret;
546 }
547 VHOST_LOG(INFO, "Enable interrupt for rxq%d\n", qid);
548 rte_vhost_enable_guest_notification(vq->vid, (qid << 1) + 1, 1);
549 rte_wmb();
550
551 return ret;
552 }
553
554 static int
555 eth_rxq_intr_disable(struct rte_eth_dev *dev, uint16_t qid)
556 {
557 struct rte_vhost_vring vring;
558 struct vhost_queue *vq;
559 int ret = 0;
560
561 vq = dev->data->rx_queues[qid];
562 if (!vq) {
563 VHOST_LOG(ERR, "rxq%d is not setup yet\n", qid);
564 return -1;
565 }
566
567 ret = rte_vhost_get_vhost_vring(vq->vid, (qid << 1) + 1, &vring);
568 if (ret < 0) {
569 VHOST_LOG(ERR, "Failed to get rxq%d's vring", qid);
570 return ret;
571 }
572 VHOST_LOG(INFO, "Disable interrupt for rxq%d\n", qid);
573 rte_vhost_enable_guest_notification(vq->vid, (qid << 1) + 1, 0);
574 rte_wmb();
575
576 return 0;
577 }
578
579 static void
580 eth_vhost_uninstall_intr(struct rte_eth_dev *dev)
581 {
582 struct rte_intr_handle *intr_handle = dev->intr_handle;
583
584 if (intr_handle) {
585 if (intr_handle->intr_vec)
586 free(intr_handle->intr_vec);
587 free(intr_handle);
588 }
589
590 dev->intr_handle = NULL;
591 }
592
593 static int
594 eth_vhost_install_intr(struct rte_eth_dev *dev)
595 {
596 struct rte_vhost_vring vring;
597 struct vhost_queue *vq;
598 int count = 0;
599 int nb_rxq = dev->data->nb_rx_queues;
600 int i;
601 int ret;
602
603 /* uninstall firstly if we are reconnecting */
604 if (dev->intr_handle)
605 eth_vhost_uninstall_intr(dev);
606
607 dev->intr_handle = malloc(sizeof(*dev->intr_handle));
608 if (!dev->intr_handle) {
609 VHOST_LOG(ERR, "Fail to allocate intr_handle\n");
610 return -ENOMEM;
611 }
612 memset(dev->intr_handle, 0, sizeof(*dev->intr_handle));
613
614 dev->intr_handle->efd_counter_size = sizeof(uint64_t);
615
616 dev->intr_handle->intr_vec =
617 malloc(nb_rxq * sizeof(dev->intr_handle->intr_vec[0]));
618
619 if (!dev->intr_handle->intr_vec) {
620 VHOST_LOG(ERR,
621 "Failed to allocate memory for interrupt vector\n");
622 free(dev->intr_handle);
623 return -ENOMEM;
624 }
625
626 VHOST_LOG(INFO, "Prepare intr vec\n");
627 for (i = 0; i < nb_rxq; i++) {
628 vq = dev->data->rx_queues[i];
629 if (!vq) {
630 VHOST_LOG(INFO, "rxq-%d not setup yet, skip!\n", i);
631 continue;
632 }
633
634 ret = rte_vhost_get_vhost_vring(vq->vid, (i << 1) + 1, &vring);
635 if (ret < 0) {
636 VHOST_LOG(INFO,
637 "Failed to get rxq-%d's vring, skip!\n", i);
638 continue;
639 }
640
641 if (vring.kickfd < 0) {
642 VHOST_LOG(INFO,
643 "rxq-%d's kickfd is invalid, skip!\n", i);
644 continue;
645 }
646 dev->intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + i;
647 dev->intr_handle->efds[i] = vring.kickfd;
648 count++;
649 VHOST_LOG(INFO, "Installed intr vec for rxq-%d\n", i);
650 }
651
652 dev->intr_handle->nb_efd = count;
653 dev->intr_handle->max_intr = count + 1;
654 dev->intr_handle->type = RTE_INTR_HANDLE_VDEV;
655
656 return 0;
657 }
658
659 static void
660 update_queuing_status(struct rte_eth_dev *dev)
661 {
662 struct pmd_internal *internal = dev->data->dev_private;
663 struct vhost_queue *vq;
664 unsigned int i;
665 int allow_queuing = 1;
666
667 if (!dev->data->rx_queues || !dev->data->tx_queues)
668 return;
669
670 if (rte_atomic32_read(&internal->started) == 0 ||
671 rte_atomic32_read(&internal->dev_attached) == 0)
672 allow_queuing = 0;
673
674 /* Wait until rx/tx_pkt_burst stops accessing vhost device */
675 for (i = 0; i < dev->data->nb_rx_queues; i++) {
676 vq = dev->data->rx_queues[i];
677 if (vq == NULL)
678 continue;
679 rte_atomic32_set(&vq->allow_queuing, allow_queuing);
680 while (rte_atomic32_read(&vq->while_queuing))
681 rte_pause();
682 }
683
684 for (i = 0; i < dev->data->nb_tx_queues; i++) {
685 vq = dev->data->tx_queues[i];
686 if (vq == NULL)
687 continue;
688 rte_atomic32_set(&vq->allow_queuing, allow_queuing);
689 while (rte_atomic32_read(&vq->while_queuing))
690 rte_pause();
691 }
692 }
693
694 static void
695 queue_setup(struct rte_eth_dev *eth_dev, struct pmd_internal *internal)
696 {
697 struct vhost_queue *vq;
698 int i;
699
700 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
701 vq = eth_dev->data->rx_queues[i];
702 if (!vq)
703 continue;
704 vq->vid = internal->vid;
705 vq->internal = internal;
706 vq->port = eth_dev->data->port_id;
707 }
708 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
709 vq = eth_dev->data->tx_queues[i];
710 if (!vq)
711 continue;
712 vq->vid = internal->vid;
713 vq->internal = internal;
714 vq->port = eth_dev->data->port_id;
715 }
716 }
717
718 static int
719 new_device(int vid)
720 {
721 struct rte_eth_dev *eth_dev;
722 struct internal_list *list;
723 struct pmd_internal *internal;
724 struct rte_eth_conf *dev_conf;
725 unsigned i;
726 char ifname[PATH_MAX];
727 #ifdef RTE_LIBRTE_VHOST_NUMA
728 int newnode;
729 #endif
730
731 rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
732 list = find_internal_resource(ifname);
733 if (list == NULL) {
734 VHOST_LOG(INFO, "Invalid device name: %s\n", ifname);
735 return -1;
736 }
737
738 eth_dev = list->eth_dev;
739 internal = eth_dev->data->dev_private;
740 dev_conf = &eth_dev->data->dev_conf;
741
742 #ifdef RTE_LIBRTE_VHOST_NUMA
743 newnode = rte_vhost_get_numa_node(vid);
744 if (newnode >= 0)
745 eth_dev->data->numa_node = newnode;
746 #endif
747
748 internal->vid = vid;
749 if (rte_atomic32_read(&internal->started) == 1) {
750 queue_setup(eth_dev, internal);
751
752 if (dev_conf->intr_conf.rxq) {
753 if (eth_vhost_install_intr(eth_dev) < 0) {
754 VHOST_LOG(INFO,
755 "Failed to install interrupt handler.");
756 return -1;
757 }
758 }
759 } else {
760 VHOST_LOG(INFO, "RX/TX queues not exist yet\n");
761 }
762
763 for (i = 0; i < rte_vhost_get_vring_num(vid); i++)
764 rte_vhost_enable_guest_notification(vid, i, 0);
765
766 rte_vhost_get_mtu(vid, &eth_dev->data->mtu);
767
768 eth_dev->data->dev_link.link_status = ETH_LINK_UP;
769
770 rte_atomic32_set(&internal->dev_attached, 1);
771 update_queuing_status(eth_dev);
772
773 VHOST_LOG(INFO, "Vhost device %d created\n", vid);
774
775 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
776
777 return 0;
778 }
779
780 static void
781 destroy_device(int vid)
782 {
783 struct rte_eth_dev *eth_dev;
784 struct pmd_internal *internal;
785 struct vhost_queue *vq;
786 struct internal_list *list;
787 char ifname[PATH_MAX];
788 unsigned i;
789 struct rte_vhost_vring_state *state;
790
791 rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
792 list = find_internal_resource(ifname);
793 if (list == NULL) {
794 VHOST_LOG(ERR, "Invalid interface name: %s\n", ifname);
795 return;
796 }
797 eth_dev = list->eth_dev;
798 internal = eth_dev->data->dev_private;
799
800 rte_atomic32_set(&internal->dev_attached, 0);
801 update_queuing_status(eth_dev);
802
803 eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
804
805 if (eth_dev->data->rx_queues && eth_dev->data->tx_queues) {
806 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
807 vq = eth_dev->data->rx_queues[i];
808 if (!vq)
809 continue;
810 vq->vid = -1;
811 }
812 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
813 vq = eth_dev->data->tx_queues[i];
814 if (!vq)
815 continue;
816 vq->vid = -1;
817 }
818 }
819
820 state = vring_states[eth_dev->data->port_id];
821 rte_spinlock_lock(&state->lock);
822 for (i = 0; i <= state->max_vring; i++) {
823 state->cur[i] = false;
824 state->seen[i] = false;
825 }
826 state->max_vring = 0;
827 rte_spinlock_unlock(&state->lock);
828
829 VHOST_LOG(INFO, "Vhost device %d destroyed\n", vid);
830 eth_vhost_uninstall_intr(eth_dev);
831
832 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
833 }
834
835 static int
836 vring_state_changed(int vid, uint16_t vring, int enable)
837 {
838 struct rte_vhost_vring_state *state;
839 struct rte_eth_dev *eth_dev;
840 struct internal_list *list;
841 char ifname[PATH_MAX];
842
843 rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
844 list = find_internal_resource(ifname);
845 if (list == NULL) {
846 VHOST_LOG(ERR, "Invalid interface name: %s\n", ifname);
847 return -1;
848 }
849
850 eth_dev = list->eth_dev;
851 /* won't be NULL */
852 state = vring_states[eth_dev->data->port_id];
853 rte_spinlock_lock(&state->lock);
854 state->cur[vring] = enable;
855 state->max_vring = RTE_MAX(vring, state->max_vring);
856 rte_spinlock_unlock(&state->lock);
857
858 VHOST_LOG(INFO, "vring%u is %s\n",
859 vring, enable ? "enabled" : "disabled");
860
861 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE, NULL);
862
863 return 0;
864 }
865
866 static struct vhost_device_ops vhost_ops = {
867 .new_device = new_device,
868 .destroy_device = destroy_device,
869 .vring_state_changed = vring_state_changed,
870 };
871
872 int
873 rte_eth_vhost_get_queue_event(uint16_t port_id,
874 struct rte_eth_vhost_queue_event *event)
875 {
876 struct rte_vhost_vring_state *state;
877 unsigned int i;
878 int idx;
879
880 if (port_id >= RTE_MAX_ETHPORTS) {
881 VHOST_LOG(ERR, "Invalid port id\n");
882 return -1;
883 }
884
885 state = vring_states[port_id];
886 if (!state) {
887 VHOST_LOG(ERR, "Unused port\n");
888 return -1;
889 }
890
891 rte_spinlock_lock(&state->lock);
892 for (i = 0; i <= state->max_vring; i++) {
893 idx = state->index++ % (state->max_vring + 1);
894
895 if (state->cur[idx] != state->seen[idx]) {
896 state->seen[idx] = state->cur[idx];
897 event->queue_id = idx / 2;
898 event->rx = idx & 1;
899 event->enable = state->cur[idx];
900 rte_spinlock_unlock(&state->lock);
901 return 0;
902 }
903 }
904 rte_spinlock_unlock(&state->lock);
905
906 return -1;
907 }
908
909 int
910 rte_eth_vhost_get_vid_from_port_id(uint16_t port_id)
911 {
912 struct internal_list *list;
913 struct rte_eth_dev *eth_dev;
914 struct vhost_queue *vq;
915 int vid = -1;
916
917 if (!rte_eth_dev_is_valid_port(port_id))
918 return -1;
919
920 pthread_mutex_lock(&internal_list_lock);
921
922 TAILQ_FOREACH(list, &internal_list, next) {
923 eth_dev = list->eth_dev;
924 if (eth_dev->data->port_id == port_id) {
925 vq = eth_dev->data->rx_queues[0];
926 if (vq) {
927 vid = vq->vid;
928 }
929 break;
930 }
931 }
932
933 pthread_mutex_unlock(&internal_list_lock);
934
935 return vid;
936 }
937
938 static int
939 eth_dev_start(struct rte_eth_dev *eth_dev)
940 {
941 struct pmd_internal *internal = eth_dev->data->dev_private;
942 struct rte_eth_conf *dev_conf = &eth_dev->data->dev_conf;
943
944 queue_setup(eth_dev, internal);
945
946 if (rte_atomic32_read(&internal->dev_attached) == 1) {
947 if (dev_conf->intr_conf.rxq) {
948 if (eth_vhost_install_intr(eth_dev) < 0) {
949 VHOST_LOG(INFO,
950 "Failed to install interrupt handler.");
951 return -1;
952 }
953 }
954 }
955
956 rte_atomic32_set(&internal->started, 1);
957 update_queuing_status(eth_dev);
958
959 return 0;
960 }
961
962 static void
963 eth_dev_stop(struct rte_eth_dev *dev)
964 {
965 struct pmd_internal *internal = dev->data->dev_private;
966
967 rte_atomic32_set(&internal->started, 0);
968 update_queuing_status(dev);
969 }
970
971 static void
972 eth_dev_close(struct rte_eth_dev *dev)
973 {
974 struct pmd_internal *internal;
975 struct internal_list *list;
976 unsigned int i;
977
978 internal = dev->data->dev_private;
979 if (!internal)
980 return;
981
982 eth_dev_stop(dev);
983
984 rte_vhost_driver_unregister(internal->iface_name);
985
986 list = find_internal_resource(internal->iface_name);
987 if (!list)
988 return;
989
990 pthread_mutex_lock(&internal_list_lock);
991 TAILQ_REMOVE(&internal_list, list, next);
992 pthread_mutex_unlock(&internal_list_lock);
993 rte_free(list);
994
995 if (dev->data->rx_queues)
996 for (i = 0; i < dev->data->nb_rx_queues; i++)
997 rte_free(dev->data->rx_queues[i]);
998
999 if (dev->data->tx_queues)
1000 for (i = 0; i < dev->data->nb_tx_queues; i++)
1001 rte_free(dev->data->tx_queues[i]);
1002
1003 free(internal->dev_name);
1004 free(internal->iface_name);
1005 rte_free(internal);
1006
1007 dev->data->dev_private = NULL;
1008 }
1009
1010 static int
1011 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
1012 uint16_t nb_rx_desc __rte_unused,
1013 unsigned int socket_id,
1014 const struct rte_eth_rxconf *rx_conf __rte_unused,
1015 struct rte_mempool *mb_pool)
1016 {
1017 struct vhost_queue *vq;
1018
1019 vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
1020 RTE_CACHE_LINE_SIZE, socket_id);
1021 if (vq == NULL) {
1022 VHOST_LOG(ERR, "Failed to allocate memory for rx queue\n");
1023 return -ENOMEM;
1024 }
1025
1026 vq->mb_pool = mb_pool;
1027 vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
1028 dev->data->rx_queues[rx_queue_id] = vq;
1029
1030 return 0;
1031 }
1032
1033 static int
1034 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
1035 uint16_t nb_tx_desc __rte_unused,
1036 unsigned int socket_id,
1037 const struct rte_eth_txconf *tx_conf __rte_unused)
1038 {
1039 struct vhost_queue *vq;
1040
1041 vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
1042 RTE_CACHE_LINE_SIZE, socket_id);
1043 if (vq == NULL) {
1044 VHOST_LOG(ERR, "Failed to allocate memory for tx queue\n");
1045 return -ENOMEM;
1046 }
1047
1048 vq->virtqueue_id = tx_queue_id * VIRTIO_QNUM + VIRTIO_RXQ;
1049 dev->data->tx_queues[tx_queue_id] = vq;
1050
1051 return 0;
1052 }
1053
1054 static void
1055 eth_dev_info(struct rte_eth_dev *dev,
1056 struct rte_eth_dev_info *dev_info)
1057 {
1058 struct pmd_internal *internal;
1059
1060 internal = dev->data->dev_private;
1061 if (internal == NULL) {
1062 VHOST_LOG(ERR, "Invalid device specified\n");
1063 return;
1064 }
1065
1066 dev_info->max_mac_addrs = 1;
1067 dev_info->max_rx_pktlen = (uint32_t)-1;
1068 dev_info->max_rx_queues = internal->max_queues;
1069 dev_info->max_tx_queues = internal->max_queues;
1070 dev_info->min_rx_bufsize = 0;
1071
1072 dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
1073 DEV_TX_OFFLOAD_VLAN_INSERT;
1074 dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
1075 }
1076
1077 static int
1078 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1079 {
1080 unsigned i;
1081 unsigned long rx_total = 0, tx_total = 0, tx_missed_total = 0;
1082 unsigned long rx_total_bytes = 0, tx_total_bytes = 0;
1083 struct vhost_queue *vq;
1084
1085 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
1086 i < dev->data->nb_rx_queues; i++) {
1087 if (dev->data->rx_queues[i] == NULL)
1088 continue;
1089 vq = dev->data->rx_queues[i];
1090 stats->q_ipackets[i] = vq->stats.pkts;
1091 rx_total += stats->q_ipackets[i];
1092
1093 stats->q_ibytes[i] = vq->stats.bytes;
1094 rx_total_bytes += stats->q_ibytes[i];
1095 }
1096
1097 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
1098 i < dev->data->nb_tx_queues; i++) {
1099 if (dev->data->tx_queues[i] == NULL)
1100 continue;
1101 vq = dev->data->tx_queues[i];
1102 stats->q_opackets[i] = vq->stats.pkts;
1103 tx_missed_total += vq->stats.missed_pkts;
1104 tx_total += stats->q_opackets[i];
1105
1106 stats->q_obytes[i] = vq->stats.bytes;
1107 tx_total_bytes += stats->q_obytes[i];
1108 }
1109
1110 stats->ipackets = rx_total;
1111 stats->opackets = tx_total;
1112 stats->oerrors = tx_missed_total;
1113 stats->ibytes = rx_total_bytes;
1114 stats->obytes = tx_total_bytes;
1115
1116 return 0;
1117 }
1118
1119 static void
1120 eth_stats_reset(struct rte_eth_dev *dev)
1121 {
1122 struct vhost_queue *vq;
1123 unsigned i;
1124
1125 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1126 if (dev->data->rx_queues[i] == NULL)
1127 continue;
1128 vq = dev->data->rx_queues[i];
1129 vq->stats.pkts = 0;
1130 vq->stats.bytes = 0;
1131 }
1132 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1133 if (dev->data->tx_queues[i] == NULL)
1134 continue;
1135 vq = dev->data->tx_queues[i];
1136 vq->stats.pkts = 0;
1137 vq->stats.bytes = 0;
1138 vq->stats.missed_pkts = 0;
1139 }
1140 }
1141
1142 static void
1143 eth_queue_release(void *q)
1144 {
1145 rte_free(q);
1146 }
1147
1148 static int
1149 eth_tx_done_cleanup(void *txq __rte_unused, uint32_t free_cnt __rte_unused)
1150 {
1151 /*
1152 * vHost does not hang onto mbuf. eth_vhost_tx() copies packet data
1153 * and releases mbuf, so nothing to cleanup.
1154 */
1155 return 0;
1156 }
1157
1158 static int
1159 eth_link_update(struct rte_eth_dev *dev __rte_unused,
1160 int wait_to_complete __rte_unused)
1161 {
1162 return 0;
1163 }
1164
1165 static uint32_t
1166 eth_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1167 {
1168 struct vhost_queue *vq;
1169
1170 vq = dev->data->rx_queues[rx_queue_id];
1171 if (vq == NULL)
1172 return 0;
1173
1174 return rte_vhost_rx_queue_count(vq->vid, vq->virtqueue_id);
1175 }
1176
1177 static const struct eth_dev_ops ops = {
1178 .dev_start = eth_dev_start,
1179 .dev_stop = eth_dev_stop,
1180 .dev_close = eth_dev_close,
1181 .dev_configure = eth_dev_configure,
1182 .dev_infos_get = eth_dev_info,
1183 .rx_queue_setup = eth_rx_queue_setup,
1184 .tx_queue_setup = eth_tx_queue_setup,
1185 .rx_queue_release = eth_queue_release,
1186 .tx_queue_release = eth_queue_release,
1187 .tx_done_cleanup = eth_tx_done_cleanup,
1188 .rx_queue_count = eth_rx_queue_count,
1189 .link_update = eth_link_update,
1190 .stats_get = eth_stats_get,
1191 .stats_reset = eth_stats_reset,
1192 .xstats_reset = vhost_dev_xstats_reset,
1193 .xstats_get = vhost_dev_xstats_get,
1194 .xstats_get_names = vhost_dev_xstats_get_names,
1195 .rx_queue_intr_enable = eth_rxq_intr_enable,
1196 .rx_queue_intr_disable = eth_rxq_intr_disable,
1197 };
1198
1199 static struct rte_vdev_driver pmd_vhost_drv;
1200
1201 static int
1202 eth_dev_vhost_create(struct rte_vdev_device *dev, char *iface_name,
1203 int16_t queues, const unsigned int numa_node, uint64_t flags)
1204 {
1205 const char *name = rte_vdev_device_name(dev);
1206 struct rte_eth_dev_data *data;
1207 struct pmd_internal *internal = NULL;
1208 struct rte_eth_dev *eth_dev = NULL;
1209 struct ether_addr *eth_addr = NULL;
1210 struct rte_vhost_vring_state *vring_state = NULL;
1211 struct internal_list *list = NULL;
1212
1213 VHOST_LOG(INFO, "Creating VHOST-USER backend on numa socket %u\n",
1214 numa_node);
1215
1216 list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
1217 if (list == NULL)
1218 goto error;
1219
1220 /* reserve an ethdev entry */
1221 eth_dev = rte_eth_vdev_allocate(dev, sizeof(*internal));
1222 if (eth_dev == NULL)
1223 goto error;
1224 data = eth_dev->data;
1225
1226 eth_addr = rte_zmalloc_socket(name, sizeof(*eth_addr), 0, numa_node);
1227 if (eth_addr == NULL)
1228 goto error;
1229 data->mac_addrs = eth_addr;
1230 *eth_addr = base_eth_addr;
1231 eth_addr->addr_bytes[5] = eth_dev->data->port_id;
1232
1233 vring_state = rte_zmalloc_socket(name,
1234 sizeof(*vring_state), 0, numa_node);
1235 if (vring_state == NULL)
1236 goto error;
1237
1238 /* now put it all together
1239 * - store queue data in internal,
1240 * - point eth_dev_data to internals
1241 * - and point eth_dev structure to new eth_dev_data structure
1242 */
1243 internal = eth_dev->data->dev_private;
1244 internal->dev_name = strdup(name);
1245 if (internal->dev_name == NULL)
1246 goto error;
1247 internal->iface_name = strdup(iface_name);
1248 if (internal->iface_name == NULL)
1249 goto error;
1250
1251 list->eth_dev = eth_dev;
1252 pthread_mutex_lock(&internal_list_lock);
1253 TAILQ_INSERT_TAIL(&internal_list, list, next);
1254 pthread_mutex_unlock(&internal_list_lock);
1255
1256 rte_spinlock_init(&vring_state->lock);
1257 vring_states[eth_dev->data->port_id] = vring_state;
1258
1259 data->nb_rx_queues = queues;
1260 data->nb_tx_queues = queues;
1261 internal->max_queues = queues;
1262 internal->vid = -1;
1263 data->dev_link = pmd_link;
1264 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1265
1266 eth_dev->dev_ops = &ops;
1267
1268 /* finally assign rx and tx ops */
1269 eth_dev->rx_pkt_burst = eth_vhost_rx;
1270 eth_dev->tx_pkt_burst = eth_vhost_tx;
1271
1272 if (rte_vhost_driver_register(iface_name, flags))
1273 goto error;
1274
1275 if (rte_vhost_driver_callback_register(iface_name, &vhost_ops) < 0) {
1276 VHOST_LOG(ERR, "Can't register callbacks\n");
1277 goto error;
1278 }
1279
1280 if (rte_vhost_driver_start(iface_name) < 0) {
1281 VHOST_LOG(ERR, "Failed to start driver for %s\n",
1282 iface_name);
1283 goto error;
1284 }
1285
1286 rte_eth_dev_probing_finish(eth_dev);
1287 return data->port_id;
1288
1289 error:
1290 if (internal) {
1291 free(internal->iface_name);
1292 free(internal->dev_name);
1293 }
1294 rte_free(vring_state);
1295 rte_eth_dev_release_port(eth_dev);
1296 rte_free(list);
1297
1298 return -1;
1299 }
1300
1301 static inline int
1302 open_iface(const char *key __rte_unused, const char *value, void *extra_args)
1303 {
1304 const char **iface_name = extra_args;
1305
1306 if (value == NULL)
1307 return -1;
1308
1309 *iface_name = value;
1310
1311 return 0;
1312 }
1313
1314 static inline int
1315 open_int(const char *key __rte_unused, const char *value, void *extra_args)
1316 {
1317 uint16_t *n = extra_args;
1318
1319 if (value == NULL || extra_args == NULL)
1320 return -EINVAL;
1321
1322 *n = (uint16_t)strtoul(value, NULL, 0);
1323 if (*n == USHRT_MAX && errno == ERANGE)
1324 return -1;
1325
1326 return 0;
1327 }
1328
1329 static int
1330 rte_pmd_vhost_probe(struct rte_vdev_device *dev)
1331 {
1332 struct rte_kvargs *kvlist = NULL;
1333 int ret = 0;
1334 char *iface_name;
1335 uint16_t queues;
1336 uint64_t flags = 0;
1337 int client_mode = 0;
1338 int dequeue_zero_copy = 0;
1339 int iommu_support = 0;
1340 int postcopy_support = 0;
1341 struct rte_eth_dev *eth_dev;
1342 const char *name = rte_vdev_device_name(dev);
1343
1344 VHOST_LOG(INFO, "Initializing pmd_vhost for %s\n", name);
1345
1346 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1347 eth_dev = rte_eth_dev_attach_secondary(name);
1348 if (!eth_dev) {
1349 VHOST_LOG(ERR, "Failed to probe %s\n", name);
1350 return -1;
1351 }
1352 /* TODO: request info from primary to set up Rx and Tx */
1353 eth_dev->dev_ops = &ops;
1354 eth_dev->device = &dev->device;
1355 rte_eth_dev_probing_finish(eth_dev);
1356 return 0;
1357 }
1358
1359 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
1360 if (kvlist == NULL)
1361 return -1;
1362
1363 if (rte_kvargs_count(kvlist, ETH_VHOST_IFACE_ARG) == 1) {
1364 ret = rte_kvargs_process(kvlist, ETH_VHOST_IFACE_ARG,
1365 &open_iface, &iface_name);
1366 if (ret < 0)
1367 goto out_free;
1368 } else {
1369 ret = -1;
1370 goto out_free;
1371 }
1372
1373 if (rte_kvargs_count(kvlist, ETH_VHOST_QUEUES_ARG) == 1) {
1374 ret = rte_kvargs_process(kvlist, ETH_VHOST_QUEUES_ARG,
1375 &open_int, &queues);
1376 if (ret < 0 || queues > RTE_MAX_QUEUES_PER_PORT)
1377 goto out_free;
1378
1379 } else
1380 queues = 1;
1381
1382 if (rte_kvargs_count(kvlist, ETH_VHOST_CLIENT_ARG) == 1) {
1383 ret = rte_kvargs_process(kvlist, ETH_VHOST_CLIENT_ARG,
1384 &open_int, &client_mode);
1385 if (ret < 0)
1386 goto out_free;
1387
1388 if (client_mode)
1389 flags |= RTE_VHOST_USER_CLIENT;
1390 }
1391
1392 if (rte_kvargs_count(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY) == 1) {
1393 ret = rte_kvargs_process(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY,
1394 &open_int, &dequeue_zero_copy);
1395 if (ret < 0)
1396 goto out_free;
1397
1398 if (dequeue_zero_copy)
1399 flags |= RTE_VHOST_USER_DEQUEUE_ZERO_COPY;
1400 }
1401
1402 if (rte_kvargs_count(kvlist, ETH_VHOST_IOMMU_SUPPORT) == 1) {
1403 ret = rte_kvargs_process(kvlist, ETH_VHOST_IOMMU_SUPPORT,
1404 &open_int, &iommu_support);
1405 if (ret < 0)
1406 goto out_free;
1407
1408 if (iommu_support)
1409 flags |= RTE_VHOST_USER_IOMMU_SUPPORT;
1410 }
1411
1412 if (rte_kvargs_count(kvlist, ETH_VHOST_POSTCOPY_SUPPORT) == 1) {
1413 ret = rte_kvargs_process(kvlist, ETH_VHOST_POSTCOPY_SUPPORT,
1414 &open_int, &postcopy_support);
1415 if (ret < 0)
1416 goto out_free;
1417
1418 if (postcopy_support)
1419 flags |= RTE_VHOST_USER_POSTCOPY_SUPPORT;
1420 }
1421
1422 if (dev->device.numa_node == SOCKET_ID_ANY)
1423 dev->device.numa_node = rte_socket_id();
1424
1425 eth_dev_vhost_create(dev, iface_name, queues, dev->device.numa_node,
1426 flags);
1427
1428 out_free:
1429 rte_kvargs_free(kvlist);
1430 return ret;
1431 }
1432
1433 static int
1434 rte_pmd_vhost_remove(struct rte_vdev_device *dev)
1435 {
1436 const char *name;
1437 struct rte_eth_dev *eth_dev = NULL;
1438
1439 name = rte_vdev_device_name(dev);
1440 VHOST_LOG(INFO, "Un-Initializing pmd_vhost for %s\n", name);
1441
1442 /* find an ethdev entry */
1443 eth_dev = rte_eth_dev_allocated(name);
1444 if (eth_dev == NULL)
1445 return -ENODEV;
1446
1447 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1448 return rte_eth_dev_release_port(eth_dev);
1449
1450 eth_dev_close(eth_dev);
1451
1452 rte_free(vring_states[eth_dev->data->port_id]);
1453 vring_states[eth_dev->data->port_id] = NULL;
1454
1455 rte_eth_dev_release_port(eth_dev);
1456
1457 return 0;
1458 }
1459
1460 static struct rte_vdev_driver pmd_vhost_drv = {
1461 .probe = rte_pmd_vhost_probe,
1462 .remove = rte_pmd_vhost_remove,
1463 };
1464
1465 RTE_PMD_REGISTER_VDEV(net_vhost, pmd_vhost_drv);
1466 RTE_PMD_REGISTER_ALIAS(net_vhost, eth_vhost);
1467 RTE_PMD_REGISTER_PARAM_STRING(net_vhost,
1468 "iface=<ifc> "
1469 "queues=<int> "
1470 "client=<0|1> "
1471 "dequeue-zero-copy=<0|1> "
1472 "iommu-support=<0|1> "
1473 "postcopy-support=<0|1>");
1474
1475 RTE_INIT(vhost_init_log)
1476 {
1477 vhost_logtype = rte_log_register("pmd.net.vhost");
1478 if (vhost_logtype >= 0)
1479 rte_log_set_level(vhost_logtype, RTE_LOG_NOTICE);
1480 }
Ceph