1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2018-2019 Cisco Systems, Inc. All rights reserved. 3 */ 4 5 #include <stdlib.h> 6 #include <fcntl.h> 7 #include <unistd.h> 8 #include <sys/types.h> 9 #include <sys/socket.h> 10 #include <sys/un.h> 11 #include <sys/ioctl.h> 12 #include <sys/mman.h> 13 #include <linux/if_ether.h> 14 #include <errno.h> 15 #include <sys/eventfd.h> 16 17 #include <rte_version.h> 18 #include <rte_mbuf.h> 19 #include <rte_ether.h> 20 #include <ethdev_driver.h> 21 #include <ethdev_vdev.h> 22 #include <rte_malloc.h> 23 #include <rte_kvargs.h> 24 #include <rte_bus_vdev.h> 25 #include <rte_string_fns.h> 26 #include <rte_errno.h> 27 #include <rte_memory.h> 28 #include <rte_memzone.h> 29 #include <rte_eal_memconfig.h> 30 31 #include "rte_eth_memif.h" 32 #include "memif_socket.h" 33 34 #define ETH_MEMIF_ID_ARG "id" 35 #define ETH_MEMIF_ROLE_ARG "role" 36 #define ETH_MEMIF_PKT_BUFFER_SIZE_ARG "bsize" 37 #define ETH_MEMIF_RING_SIZE_ARG "rsize" 38 #define ETH_MEMIF_SOCKET_ARG "socket" 39 #define ETH_MEMIF_SOCKET_ABSTRACT_ARG "socket-abstract" 40 #define ETH_MEMIF_MAC_ARG "mac" 41 #define ETH_MEMIF_ZC_ARG "zero-copy" 42 #define ETH_MEMIF_SECRET_ARG "secret" 43 44 static const char * const valid_arguments[] = { 45 ETH_MEMIF_ID_ARG, 46 ETH_MEMIF_ROLE_ARG, 47 ETH_MEMIF_PKT_BUFFER_SIZE_ARG, 48 ETH_MEMIF_RING_SIZE_ARG, 49 ETH_MEMIF_SOCKET_ARG, 50 ETH_MEMIF_SOCKET_ABSTRACT_ARG, 51 ETH_MEMIF_MAC_ARG, 52 ETH_MEMIF_ZC_ARG, 53 ETH_MEMIF_SECRET_ARG, 54 NULL 55 }; 56 57 static const struct rte_eth_link pmd_link = { 58 .link_speed = RTE_ETH_SPEED_NUM_10G, 59 .link_duplex = RTE_ETH_LINK_FULL_DUPLEX, 60 .link_status = RTE_ETH_LINK_DOWN, 61 .link_autoneg = RTE_ETH_LINK_AUTONEG 62 }; 63 64 #define MEMIF_MP_SEND_REGION "memif_mp_send_region" 65 66 67 static int memif_region_init_zc(const struct rte_memseg_list *msl, 68 const struct rte_memseg *ms, void *arg); 69 70 const char * 71 memif_version(void) 72 { 73 return ("memif-" RTE_STR(MEMIF_VERSION_MAJOR) "." RTE_STR(MEMIF_VERSION_MINOR)); 74 } 75 76 /* Message header to synchronize regions */ 77 struct mp_region_msg { 78 char port_name[RTE_DEV_NAME_MAX_LEN]; 79 memif_region_index_t idx; 80 memif_region_size_t size; 81 }; 82 83 static int 84 memif_mp_send_region(const struct rte_mp_msg *msg, const void *peer) 85 { 86 struct rte_eth_dev *dev; 87 struct pmd_process_private *proc_private; 88 const struct mp_region_msg *msg_param = (const struct mp_region_msg *)msg->param; 89 struct rte_mp_msg reply; 90 struct mp_region_msg *reply_param = (struct mp_region_msg *)reply.param; 91 92 /* Get requested port */ 93 dev = rte_eth_dev_get_by_name(msg_param->port_name); 94 if (!dev) { 95 MIF_LOG(ERR, "Failed to get port id for %s", 96 msg_param->port_name); 97 return -1; 98 } 99 proc_private = dev->process_private; 100 101 memset(&reply, 0, sizeof(reply)); 102 strlcpy(reply.name, msg->name, sizeof(reply.name)); 103 reply_param->idx = msg_param->idx; 104 if (proc_private->regions[msg_param->idx] != NULL) { 105 reply_param->size = proc_private->regions[msg_param->idx]->region_size; 106 reply.fds[0] = proc_private->regions[msg_param->idx]->fd; 107 reply.num_fds = 1; 108 } 109 reply.len_param = sizeof(*reply_param); 110 if (rte_mp_reply(&reply, peer) < 0) { 111 MIF_LOG(ERR, "Failed to reply to an add region request"); 112 return -1; 113 } 114 115 return 0; 116 } 117 118 /* 119 * Request regions 120 * Called by secondary process, when ports link status goes up. 121 */ 122 static int 123 memif_mp_request_regions(struct rte_eth_dev *dev) 124 { 125 int ret, i; 126 struct timespec timeout = {.tv_sec = 5, .tv_nsec = 0}; 127 struct rte_mp_msg msg, *reply; 128 struct rte_mp_reply replies; 129 struct mp_region_msg *msg_param = (struct mp_region_msg *)msg.param; 130 struct mp_region_msg *reply_param; 131 struct memif_region *r; 132 struct pmd_process_private *proc_private = dev->process_private; 133 struct pmd_internals *pmd = dev->data->dev_private; 134 /* in case of zero-copy client, only request region 0 */ 135 uint16_t max_region_num = (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) ? 136 1 : ETH_MEMIF_MAX_REGION_NUM; 137 138 MIF_LOG(DEBUG, "Requesting memory regions"); 139 140 for (i = 0; i < max_region_num; i++) { 141 /* Prepare the message */ 142 memset(&msg, 0, sizeof(msg)); 143 strlcpy(msg.name, MEMIF_MP_SEND_REGION, sizeof(msg.name)); 144 strlcpy(msg_param->port_name, dev->data->name, 145 sizeof(msg_param->port_name)); 146 msg_param->idx = i; 147 msg.len_param = sizeof(*msg_param); 148 149 /* Send message */ 150 ret = rte_mp_request_sync(&msg, &replies, &timeout); 151 if (ret < 0 || replies.nb_received != 1) { 152 MIF_LOG(ERR, "Failed to send mp msg: %d", 153 rte_errno); 154 return -1; 155 } 156 157 reply = &replies.msgs[0]; 158 reply_param = (struct mp_region_msg *)reply->param; 159 160 if (reply_param->size > 0) { 161 r = rte_zmalloc("region", sizeof(struct memif_region), 0); 162 if (r == NULL) { 163 MIF_LOG(ERR, "Failed to alloc memif region."); 164 free(reply); 165 return -ENOMEM; 166 } 167 r->region_size = reply_param->size; 168 if (reply->num_fds < 1) { 169 MIF_LOG(ERR, "Missing file descriptor."); 170 free(reply); 171 return -1; 172 } 173 r->fd = reply->fds[0]; 174 r->addr = NULL; 175 176 proc_private->regions[reply_param->idx] = r; 177 proc_private->regions_num++; 178 } 179 free(reply); 180 } 181 182 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 183 ret = rte_memseg_walk(memif_region_init_zc, (void *)proc_private); 184 if (ret < 0) 185 return ret; 186 } 187 188 return memif_connect(dev); 189 } 190 191 static int 192 memif_dev_info(struct rte_eth_dev *dev __rte_unused, struct rte_eth_dev_info *dev_info) 193 { 194 dev_info->max_mac_addrs = 1; 195 dev_info->max_rx_pktlen = RTE_ETHER_MAX_LEN; 196 dev_info->max_rx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS; 197 dev_info->max_tx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS; 198 dev_info->min_rx_bufsize = 0; 199 dev_info->tx_offload_capa = RTE_ETH_TX_OFFLOAD_MULTI_SEGS; 200 201 return 0; 202 } 203 204 static memif_ring_t * 205 memif_get_ring(struct pmd_internals *pmd, struct pmd_process_private *proc_private, 206 memif_ring_type_t type, uint16_t ring_num) 207 { 208 /* rings only in region 0 */ 209 void *p = proc_private->regions[0]->addr; 210 int ring_size = sizeof(memif_ring_t) + sizeof(memif_desc_t) * 211 (1 << pmd->run.log2_ring_size); 212 213 p = (uint8_t *)p + (ring_num + type * pmd->run.num_c2s_rings) * ring_size; 214 215 return (memif_ring_t *)p; 216 } 217 218 static memif_region_offset_t 219 memif_get_ring_offset(struct rte_eth_dev *dev, struct memif_queue *mq, 220 memif_ring_type_t type, uint16_t num) 221 { 222 struct pmd_internals *pmd = dev->data->dev_private; 223 struct pmd_process_private *proc_private = dev->process_private; 224 225 return ((uint8_t *)memif_get_ring(pmd, proc_private, type, num) - 226 (uint8_t *)proc_private->regions[mq->region]->addr); 227 } 228 229 static memif_ring_t * 230 memif_get_ring_from_queue(struct pmd_process_private *proc_private, 231 struct memif_queue *mq) 232 { 233 struct memif_region *r; 234 235 r = proc_private->regions[mq->region]; 236 if (r == NULL) 237 return NULL; 238 239 return (memif_ring_t *)((uint8_t *)r->addr + mq->ring_offset); 240 } 241 242 static void * 243 memif_get_buffer(struct pmd_process_private *proc_private, memif_desc_t *d) 244 { 245 return ((uint8_t *)proc_private->regions[d->region]->addr + d->offset); 246 } 247 248 /* Free mbufs received by server */ 249 static void 250 memif_free_stored_mbufs(struct pmd_process_private *proc_private, struct memif_queue *mq) 251 { 252 uint16_t cur_tail; 253 uint16_t mask = (1 << mq->log2_ring_size) - 1; 254 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 255 256 /* FIXME: improve performance */ 257 /* The ring->tail acts as a guard variable between Tx and Rx 258 * threads, so using load-acquire pairs with store-release 259 * in function eth_memif_rx for C2S queues. 260 */ 261 cur_tail = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE); 262 while (mq->last_tail != cur_tail) { 263 RTE_MBUF_PREFETCH_TO_FREE(mq->buffers[(mq->last_tail + 1) & mask]); 264 /* Decrement refcnt and free mbuf. (current segment) */ 265 rte_mbuf_refcnt_update(mq->buffers[mq->last_tail & mask], -1); 266 rte_pktmbuf_free_seg(mq->buffers[mq->last_tail & mask]); 267 mq->last_tail++; 268 } 269 } 270 271 static int 272 memif_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *cur_tail, 273 struct rte_mbuf *tail) 274 { 275 /* Check for number-of-segments-overflow */ 276 if (unlikely(head->nb_segs + tail->nb_segs > RTE_MBUF_MAX_NB_SEGS)) 277 return -EOVERFLOW; 278 279 /* Chain 'tail' onto the old tail */ 280 cur_tail->next = tail; 281 282 /* accumulate number of segments and total length. */ 283 head->nb_segs = (uint16_t)(head->nb_segs + tail->nb_segs); 284 285 tail->pkt_len = tail->data_len; 286 head->pkt_len += tail->pkt_len; 287 288 return 0; 289 } 290 291 static uint16_t 292 eth_memif_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 293 { 294 struct memif_queue *mq = queue; 295 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private; 296 struct pmd_process_private *proc_private = 297 rte_eth_devices[mq->in_port].process_private; 298 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 299 uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0; 300 uint16_t n_rx_pkts = 0; 301 uint16_t mbuf_size = rte_pktmbuf_data_room_size(mq->mempool) - 302 RTE_PKTMBUF_HEADROOM; 303 uint16_t src_len, src_off, dst_len, dst_off, cp_len; 304 memif_ring_type_t type = mq->type; 305 memif_desc_t *d0; 306 struct rte_mbuf *mbuf, *mbuf_head, *mbuf_tail; 307 uint64_t b; 308 ssize_t size __rte_unused; 309 uint16_t head; 310 int ret; 311 struct rte_eth_link link; 312 313 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0)) 314 return 0; 315 if (unlikely(ring == NULL)) { 316 /* Secondary process will attempt to request regions. */ 317 ret = rte_eth_link_get(mq->in_port, &link); 318 if (ret < 0) 319 MIF_LOG(ERR, "Failed to get port %u link info: %s", 320 mq->in_port, rte_strerror(-ret)); 321 return 0; 322 } 323 324 /* consume interrupt */ 325 if (((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) && 326 (rte_intr_fd_get(mq->intr_handle) >= 0)) 327 size = read(rte_intr_fd_get(mq->intr_handle), &b, 328 sizeof(b)); 329 330 ring_size = 1 << mq->log2_ring_size; 331 mask = ring_size - 1; 332 333 if (type == MEMIF_RING_C2S) { 334 cur_slot = mq->last_head; 335 last_slot = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE); 336 } else { 337 cur_slot = mq->last_tail; 338 last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE); 339 } 340 341 if (cur_slot == last_slot) 342 goto refill; 343 n_slots = last_slot - cur_slot; 344 345 while (n_slots && n_rx_pkts < nb_pkts) { 346 mbuf_head = rte_pktmbuf_alloc(mq->mempool); 347 if (unlikely(mbuf_head == NULL)) 348 goto no_free_bufs; 349 mbuf = mbuf_head; 350 mbuf->port = mq->in_port; 351 dst_off = 0; 352 353 next_slot: 354 s0 = cur_slot & mask; 355 d0 = &ring->desc[s0]; 356 357 src_len = d0->length; 358 src_off = 0; 359 360 do { 361 dst_len = mbuf_size - dst_off; 362 if (dst_len == 0) { 363 dst_off = 0; 364 dst_len = mbuf_size; 365 366 /* store pointer to tail */ 367 mbuf_tail = mbuf; 368 mbuf = rte_pktmbuf_alloc(mq->mempool); 369 if (unlikely(mbuf == NULL)) 370 goto no_free_bufs; 371 mbuf->port = mq->in_port; 372 ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf); 373 if (unlikely(ret < 0)) { 374 MIF_LOG(ERR, "number-of-segments-overflow"); 375 rte_pktmbuf_free(mbuf); 376 goto no_free_bufs; 377 } 378 } 379 cp_len = RTE_MIN(dst_len, src_len); 380 381 rte_pktmbuf_data_len(mbuf) += cp_len; 382 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf); 383 if (mbuf != mbuf_head) 384 rte_pktmbuf_pkt_len(mbuf_head) += cp_len; 385 386 rte_memcpy(rte_pktmbuf_mtod_offset(mbuf, void *, 387 dst_off), 388 (uint8_t *)memif_get_buffer(proc_private, d0) + 389 src_off, cp_len); 390 391 src_off += cp_len; 392 dst_off += cp_len; 393 src_len -= cp_len; 394 } while (src_len); 395 396 cur_slot++; 397 n_slots--; 398 399 if (d0->flags & MEMIF_DESC_FLAG_NEXT) 400 goto next_slot; 401 402 mq->n_bytes += rte_pktmbuf_pkt_len(mbuf_head); 403 *bufs++ = mbuf_head; 404 n_rx_pkts++; 405 } 406 407 no_free_bufs: 408 if (type == MEMIF_RING_C2S) { 409 __atomic_store_n(&ring->tail, cur_slot, __ATOMIC_RELEASE); 410 mq->last_head = cur_slot; 411 } else { 412 mq->last_tail = cur_slot; 413 } 414 415 refill: 416 if (type == MEMIF_RING_S2C) { 417 /* ring->head is updated by the receiver and this function 418 * is called in the context of receiver thread. The loads in 419 * the receiver do not need to synchronize with its own stores. 420 */ 421 head = __atomic_load_n(&ring->head, __ATOMIC_RELAXED); 422 n_slots = ring_size - head + mq->last_tail; 423 424 while (n_slots--) { 425 s0 = head++ & mask; 426 d0 = &ring->desc[s0]; 427 d0->length = pmd->run.pkt_buffer_size; 428 } 429 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE); 430 } 431 432 mq->n_pkts += n_rx_pkts; 433 return n_rx_pkts; 434 } 435 436 static uint16_t 437 eth_memif_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 438 { 439 struct memif_queue *mq = queue; 440 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private; 441 struct pmd_process_private *proc_private = 442 rte_eth_devices[mq->in_port].process_private; 443 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 444 uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0, head; 445 uint16_t n_rx_pkts = 0; 446 memif_desc_t *d0; 447 struct rte_mbuf *mbuf, *mbuf_tail; 448 struct rte_mbuf *mbuf_head = NULL; 449 int ret; 450 struct rte_eth_link link; 451 452 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0)) 453 return 0; 454 if (unlikely(ring == NULL)) { 455 /* Secondary process will attempt to request regions. */ 456 rte_eth_link_get(mq->in_port, &link); 457 return 0; 458 } 459 460 /* consume interrupt */ 461 if ((rte_intr_fd_get(mq->intr_handle) >= 0) && 462 ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)) { 463 uint64_t b; 464 ssize_t size __rte_unused; 465 size = read(rte_intr_fd_get(mq->intr_handle), &b, 466 sizeof(b)); 467 } 468 469 ring_size = 1 << mq->log2_ring_size; 470 mask = ring_size - 1; 471 472 cur_slot = mq->last_tail; 473 /* The ring->tail acts as a guard variable between Tx and Rx 474 * threads, so using load-acquire pairs with store-release 475 * to synchronize it between threads. 476 */ 477 last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE); 478 if (cur_slot == last_slot) 479 goto refill; 480 n_slots = last_slot - cur_slot; 481 482 while (n_slots && n_rx_pkts < nb_pkts) { 483 s0 = cur_slot & mask; 484 485 d0 = &ring->desc[s0]; 486 mbuf_head = mq->buffers[s0]; 487 mbuf = mbuf_head; 488 489 next_slot: 490 /* prefetch next descriptor */ 491 if (n_rx_pkts + 1 < nb_pkts) 492 rte_prefetch0(&ring->desc[(cur_slot + 1) & mask]); 493 494 mbuf->port = mq->in_port; 495 rte_pktmbuf_data_len(mbuf) = d0->length; 496 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf); 497 498 mq->n_bytes += rte_pktmbuf_data_len(mbuf); 499 500 cur_slot++; 501 n_slots--; 502 if (d0->flags & MEMIF_DESC_FLAG_NEXT) { 503 s0 = cur_slot & mask; 504 d0 = &ring->desc[s0]; 505 mbuf_tail = mbuf; 506 mbuf = mq->buffers[s0]; 507 ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf); 508 if (unlikely(ret < 0)) { 509 MIF_LOG(ERR, "number-of-segments-overflow"); 510 goto refill; 511 } 512 goto next_slot; 513 } 514 515 *bufs++ = mbuf_head; 516 n_rx_pkts++; 517 } 518 519 mq->last_tail = cur_slot; 520 521 /* Supply server with new buffers */ 522 refill: 523 /* ring->head is updated by the receiver and this function 524 * is called in the context of receiver thread. The loads in 525 * the receiver do not need to synchronize with its own stores. 526 */ 527 head = __atomic_load_n(&ring->head, __ATOMIC_RELAXED); 528 n_slots = ring_size - head + mq->last_tail; 529 530 if (n_slots < 32) 531 goto no_free_mbufs; 532 533 ret = rte_pktmbuf_alloc_bulk(mq->mempool, &mq->buffers[head & mask], n_slots); 534 if (unlikely(ret < 0)) 535 goto no_free_mbufs; 536 537 while (n_slots--) { 538 s0 = head++ & mask; 539 if (n_slots > 0) 540 rte_prefetch0(mq->buffers[head & mask]); 541 d0 = &ring->desc[s0]; 542 /* store buffer header */ 543 mbuf = mq->buffers[s0]; 544 /* populate descriptor */ 545 d0->length = rte_pktmbuf_data_room_size(mq->mempool) - 546 RTE_PKTMBUF_HEADROOM; 547 d0->region = 1; 548 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) - 549 (uint8_t *)proc_private->regions[d0->region]->addr; 550 } 551 no_free_mbufs: 552 /* The ring->head acts as a guard variable between Tx and Rx 553 * threads, so using store-release pairs with load-acquire 554 * in function eth_memif_tx. 555 */ 556 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE); 557 558 mq->n_pkts += n_rx_pkts; 559 560 return n_rx_pkts; 561 } 562 563 static uint16_t 564 eth_memif_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 565 { 566 struct memif_queue *mq = queue; 567 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private; 568 struct pmd_process_private *proc_private = 569 rte_eth_devices[mq->in_port].process_private; 570 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 571 uint16_t slot, saved_slot, n_free, ring_size, mask, n_tx_pkts = 0; 572 uint16_t src_len, src_off, dst_len, dst_off, cp_len, nb_segs; 573 memif_ring_type_t type = mq->type; 574 memif_desc_t *d0; 575 struct rte_mbuf *mbuf; 576 struct rte_mbuf *mbuf_head; 577 uint64_t a; 578 ssize_t size; 579 struct rte_eth_link link; 580 581 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0)) 582 return 0; 583 if (unlikely(ring == NULL)) { 584 int ret; 585 586 /* Secondary process will attempt to request regions. */ 587 ret = rte_eth_link_get(mq->in_port, &link); 588 if (ret < 0) 589 MIF_LOG(ERR, "Failed to get port %u link info: %s", 590 mq->in_port, rte_strerror(-ret)); 591 return 0; 592 } 593 594 ring_size = 1 << mq->log2_ring_size; 595 mask = ring_size - 1; 596 597 if (type == MEMIF_RING_C2S) { 598 /* For C2S queues ring->head is updated by the sender and 599 * this function is called in the context of sending thread. 600 * The loads in the sender do not need to synchronize with 601 * its own stores. Hence, the following load can be a 602 * relaxed load. 603 */ 604 slot = __atomic_load_n(&ring->head, __ATOMIC_RELAXED); 605 n_free = ring_size - slot + 606 __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE); 607 } else { 608 /* For S2C queues ring->tail is updated by the sender and 609 * this function is called in the context of sending thread. 610 * The loads in the sender do not need to synchronize with 611 * its own stores. Hence, the following load can be a 612 * relaxed load. 613 */ 614 slot = __atomic_load_n(&ring->tail, __ATOMIC_RELAXED); 615 n_free = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE) - slot; 616 } 617 618 while (n_tx_pkts < nb_pkts && n_free) { 619 mbuf_head = *bufs++; 620 nb_segs = mbuf_head->nb_segs; 621 mbuf = mbuf_head; 622 623 saved_slot = slot; 624 d0 = &ring->desc[slot & mask]; 625 dst_off = 0; 626 dst_len = (type == MEMIF_RING_C2S) ? 627 pmd->run.pkt_buffer_size : d0->length; 628 629 next_in_chain: 630 src_off = 0; 631 src_len = rte_pktmbuf_data_len(mbuf); 632 633 while (src_len) { 634 if (dst_len == 0) { 635 if (n_free) { 636 slot++; 637 n_free--; 638 d0->flags |= MEMIF_DESC_FLAG_NEXT; 639 d0 = &ring->desc[slot & mask]; 640 dst_off = 0; 641 dst_len = (type == MEMIF_RING_C2S) ? 642 pmd->run.pkt_buffer_size : d0->length; 643 d0->flags = 0; 644 } else { 645 slot = saved_slot; 646 goto no_free_slots; 647 } 648 } 649 cp_len = RTE_MIN(dst_len, src_len); 650 651 rte_memcpy((uint8_t *)memif_get_buffer(proc_private, 652 d0) + dst_off, 653 rte_pktmbuf_mtod_offset(mbuf, void *, src_off), 654 cp_len); 655 656 mq->n_bytes += cp_len; 657 src_off += cp_len; 658 dst_off += cp_len; 659 src_len -= cp_len; 660 dst_len -= cp_len; 661 662 d0->length = dst_off; 663 } 664 665 if (--nb_segs > 0) { 666 mbuf = mbuf->next; 667 goto next_in_chain; 668 } 669 670 n_tx_pkts++; 671 slot++; 672 n_free--; 673 rte_pktmbuf_free(mbuf_head); 674 } 675 676 no_free_slots: 677 if (type == MEMIF_RING_C2S) 678 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE); 679 else 680 __atomic_store_n(&ring->tail, slot, __ATOMIC_RELEASE); 681 682 if (((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) && 683 (rte_intr_fd_get(mq->intr_handle) >= 0)) { 684 a = 1; 685 size = write(rte_intr_fd_get(mq->intr_handle), &a, 686 sizeof(a)); 687 if (unlikely(size < 0)) { 688 MIF_LOG(WARNING, 689 "Failed to send interrupt. %s", strerror(errno)); 690 } 691 } 692 693 mq->n_pkts += n_tx_pkts; 694 return n_tx_pkts; 695 } 696 697 698 static int 699 memif_tx_one_zc(struct pmd_process_private *proc_private, struct memif_queue *mq, 700 memif_ring_t *ring, struct rte_mbuf *mbuf, const uint16_t mask, 701 uint16_t slot, uint16_t n_free) 702 { 703 memif_desc_t *d0; 704 uint16_t nb_segs = mbuf->nb_segs; 705 int used_slots = 1; 706 707 next_in_chain: 708 /* store pointer to mbuf to free it later */ 709 mq->buffers[slot & mask] = mbuf; 710 /* Increment refcnt to make sure the buffer is not freed before server 711 * receives it. (current segment) 712 */ 713 rte_mbuf_refcnt_update(mbuf, 1); 714 /* populate descriptor */ 715 d0 = &ring->desc[slot & mask]; 716 d0->length = rte_pktmbuf_data_len(mbuf); 717 mq->n_bytes += rte_pktmbuf_data_len(mbuf); 718 /* FIXME: get region index */ 719 d0->region = 1; 720 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) - 721 (uint8_t *)proc_private->regions[d0->region]->addr; 722 d0->flags = 0; 723 724 /* check if buffer is chained */ 725 if (--nb_segs > 0) { 726 if (n_free < 2) 727 return 0; 728 /* mark buffer as chained */ 729 d0->flags |= MEMIF_DESC_FLAG_NEXT; 730 /* advance mbuf */ 731 mbuf = mbuf->next; 732 /* update counters */ 733 used_slots++; 734 slot++; 735 n_free--; 736 goto next_in_chain; 737 } 738 return used_slots; 739 } 740 741 static uint16_t 742 eth_memif_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 743 { 744 struct memif_queue *mq = queue; 745 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private; 746 struct pmd_process_private *proc_private = 747 rte_eth_devices[mq->in_port].process_private; 748 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 749 uint16_t slot, n_free, ring_size, mask, n_tx_pkts = 0; 750 struct rte_eth_link link; 751 752 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0)) 753 return 0; 754 if (unlikely(ring == NULL)) { 755 /* Secondary process will attempt to request regions. */ 756 rte_eth_link_get(mq->in_port, &link); 757 return 0; 758 } 759 760 ring_size = 1 << mq->log2_ring_size; 761 mask = ring_size - 1; 762 763 /* free mbufs received by server */ 764 memif_free_stored_mbufs(proc_private, mq); 765 766 /* ring type always MEMIF_RING_C2S */ 767 /* For C2S queues ring->head is updated by the sender and 768 * this function is called in the context of sending thread. 769 * The loads in the sender do not need to synchronize with 770 * its own stores. Hence, the following load can be a 771 * relaxed load. 772 */ 773 slot = __atomic_load_n(&ring->head, __ATOMIC_RELAXED); 774 n_free = ring_size - slot + mq->last_tail; 775 776 int used_slots; 777 778 while (n_free && (n_tx_pkts < nb_pkts)) { 779 while ((n_free > 4) && ((nb_pkts - n_tx_pkts) > 4)) { 780 if ((nb_pkts - n_tx_pkts) > 8) { 781 rte_prefetch0(*bufs + 4); 782 rte_prefetch0(*bufs + 5); 783 rte_prefetch0(*bufs + 6); 784 rte_prefetch0(*bufs + 7); 785 } 786 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 787 mask, slot, n_free); 788 if (unlikely(used_slots < 1)) 789 goto no_free_slots; 790 n_tx_pkts++; 791 slot += used_slots; 792 n_free -= used_slots; 793 794 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 795 mask, slot, n_free); 796 if (unlikely(used_slots < 1)) 797 goto no_free_slots; 798 n_tx_pkts++; 799 slot += used_slots; 800 n_free -= used_slots; 801 802 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 803 mask, slot, n_free); 804 if (unlikely(used_slots < 1)) 805 goto no_free_slots; 806 n_tx_pkts++; 807 slot += used_slots; 808 n_free -= used_slots; 809 810 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 811 mask, slot, n_free); 812 if (unlikely(used_slots < 1)) 813 goto no_free_slots; 814 n_tx_pkts++; 815 slot += used_slots; 816 n_free -= used_slots; 817 } 818 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 819 mask, slot, n_free); 820 if (unlikely(used_slots < 1)) 821 goto no_free_slots; 822 n_tx_pkts++; 823 slot += used_slots; 824 n_free -= used_slots; 825 } 826 827 no_free_slots: 828 /* ring type always MEMIF_RING_C2S */ 829 /* The ring->head acts as a guard variable between Tx and Rx 830 * threads, so using store-release pairs with load-acquire 831 * in function eth_memif_rx for C2S rings. 832 */ 833 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE); 834 835 /* Send interrupt, if enabled. */ 836 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) { 837 uint64_t a = 1; 838 if (rte_intr_fd_get(mq->intr_handle) < 0) 839 return -1; 840 841 ssize_t size = write(rte_intr_fd_get(mq->intr_handle), 842 &a, sizeof(a)); 843 if (unlikely(size < 0)) { 844 MIF_LOG(WARNING, 845 "Failed to send interrupt. %s", strerror(errno)); 846 } 847 } 848 849 /* increment queue counters */ 850 mq->n_pkts += n_tx_pkts; 851 852 return n_tx_pkts; 853 } 854 855 void 856 memif_free_regions(struct rte_eth_dev *dev) 857 { 858 struct pmd_process_private *proc_private = dev->process_private; 859 struct pmd_internals *pmd = dev->data->dev_private; 860 int i; 861 struct memif_region *r; 862 863 /* regions are allocated contiguously, so it's 864 * enough to loop until 'proc_private->regions_num' 865 */ 866 for (i = 0; i < proc_private->regions_num; i++) { 867 r = proc_private->regions[i]; 868 if (r != NULL) { 869 /* This is memzone */ 870 if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) { 871 r->addr = NULL; 872 if (r->fd > 0) 873 close(r->fd); 874 } 875 if (r->addr != NULL) { 876 munmap(r->addr, r->region_size); 877 if (r->fd > 0) { 878 close(r->fd); 879 r->fd = -1; 880 } 881 } 882 rte_free(r); 883 proc_private->regions[i] = NULL; 884 } 885 } 886 proc_private->regions_num = 0; 887 } 888 889 static int 890 memif_region_init_zc(const struct rte_memseg_list *msl, const struct rte_memseg *ms, 891 void *arg) 892 { 893 struct pmd_process_private *proc_private = (struct pmd_process_private *)arg; 894 struct memif_region *r; 895 896 if (proc_private->regions_num < 1) { 897 MIF_LOG(ERR, "Missing descriptor region"); 898 return -1; 899 } 900 901 r = proc_private->regions[proc_private->regions_num - 1]; 902 903 if (r->addr != msl->base_va) 904 r = proc_private->regions[++proc_private->regions_num - 1]; 905 906 if (r == NULL) { 907 r = rte_zmalloc("region", sizeof(struct memif_region), 0); 908 if (r == NULL) { 909 MIF_LOG(ERR, "Failed to alloc memif region."); 910 return -ENOMEM; 911 } 912 913 r->addr = msl->base_va; 914 r->region_size = ms->len; 915 r->fd = rte_memseg_get_fd(ms); 916 if (r->fd < 0) 917 return -1; 918 r->pkt_buffer_offset = 0; 919 920 proc_private->regions[proc_private->regions_num - 1] = r; 921 } else { 922 r->region_size += ms->len; 923 } 924 925 return 0; 926 } 927 928 static int 929 memif_region_init_shm(struct rte_eth_dev *dev, uint8_t has_buffers) 930 { 931 struct pmd_internals *pmd = dev->data->dev_private; 932 struct pmd_process_private *proc_private = dev->process_private; 933 char shm_name[ETH_MEMIF_SHM_NAME_SIZE]; 934 int ret = 0; 935 struct memif_region *r; 936 937 if (proc_private->regions_num >= ETH_MEMIF_MAX_REGION_NUM) { 938 MIF_LOG(ERR, "Too many regions."); 939 return -1; 940 } 941 942 r = rte_zmalloc("region", sizeof(struct memif_region), 0); 943 if (r == NULL) { 944 MIF_LOG(ERR, "Failed to alloc memif region."); 945 return -ENOMEM; 946 } 947 948 /* calculate buffer offset */ 949 r->pkt_buffer_offset = (pmd->run.num_c2s_rings + pmd->run.num_s2c_rings) * 950 (sizeof(memif_ring_t) + sizeof(memif_desc_t) * 951 (1 << pmd->run.log2_ring_size)); 952 953 r->region_size = r->pkt_buffer_offset; 954 /* if region has buffers, add buffers size to region_size */ 955 if (has_buffers == 1) 956 r->region_size += (uint32_t)(pmd->run.pkt_buffer_size * 957 (1 << pmd->run.log2_ring_size) * 958 (pmd->run.num_c2s_rings + 959 pmd->run.num_s2c_rings)); 960 961 memset(shm_name, 0, sizeof(char) * ETH_MEMIF_SHM_NAME_SIZE); 962 snprintf(shm_name, ETH_MEMIF_SHM_NAME_SIZE, "memif_region_%d", 963 proc_private->regions_num); 964 965 r->fd = memfd_create(shm_name, MFD_ALLOW_SEALING); 966 if (r->fd < 0) { 967 MIF_LOG(ERR, "Failed to create shm file: %s.", strerror(errno)); 968 ret = -1; 969 goto error; 970 } 971 972 ret = fcntl(r->fd, F_ADD_SEALS, F_SEAL_SHRINK); 973 if (ret < 0) { 974 MIF_LOG(ERR, "Failed to add seals to shm file: %s.", strerror(errno)); 975 goto error; 976 } 977 978 ret = ftruncate(r->fd, r->region_size); 979 if (ret < 0) { 980 MIF_LOG(ERR, "Failed to truncate shm file: %s.", strerror(errno)); 981 goto error; 982 } 983 984 r->addr = mmap(NULL, r->region_size, PROT_READ | 985 PROT_WRITE, MAP_SHARED, r->fd, 0); 986 if (r->addr == MAP_FAILED) { 987 MIF_LOG(ERR, "Failed to mmap shm region: %s.", strerror(ret)); 988 ret = -1; 989 goto error; 990 } 991 992 proc_private->regions[proc_private->regions_num] = r; 993 proc_private->regions_num++; 994 995 return ret; 996 997 error: 998 if (r->fd > 0) 999 close(r->fd); 1000 r->fd = -1; 1001 1002 return ret; 1003 } 1004 1005 static int 1006 memif_regions_init(struct rte_eth_dev *dev) 1007 { 1008 struct pmd_internals *pmd = dev->data->dev_private; 1009 int ret; 1010 1011 /* 1012 * Zero-copy exposes dpdk memory. 1013 * Each memseg list will be represented by memif region. 1014 * Zero-copy regions indexing: memseg list idx + 1, 1015 * as we already have region 0 reserved for descriptors. 1016 */ 1017 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 1018 /* create region idx 0 containing descriptors */ 1019 ret = memif_region_init_shm(dev, 0); 1020 if (ret < 0) 1021 return ret; 1022 ret = rte_memseg_walk(memif_region_init_zc, (void *)dev->process_private); 1023 if (ret < 0) 1024 return ret; 1025 } else { 1026 /* create one memory region containing rings and buffers */ 1027 ret = memif_region_init_shm(dev, /* has buffers */ 1); 1028 if (ret < 0) 1029 return ret; 1030 } 1031 1032 return 0; 1033 } 1034 1035 static void 1036 memif_init_rings(struct rte_eth_dev *dev) 1037 { 1038 struct pmd_internals *pmd = dev->data->dev_private; 1039 struct pmd_process_private *proc_private = dev->process_private; 1040 memif_ring_t *ring; 1041 int i, j; 1042 uint16_t slot; 1043 1044 for (i = 0; i < pmd->run.num_c2s_rings; i++) { 1045 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_C2S, i); 1046 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED); 1047 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED); 1048 ring->cookie = MEMIF_COOKIE; 1049 ring->flags = 0; 1050 1051 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) 1052 continue; 1053 1054 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) { 1055 slot = i * (1 << pmd->run.log2_ring_size) + j; 1056 ring->desc[j].region = 0; 1057 ring->desc[j].offset = 1058 proc_private->regions[0]->pkt_buffer_offset + 1059 (uint32_t)(slot * pmd->run.pkt_buffer_size); 1060 ring->desc[j].length = pmd->run.pkt_buffer_size; 1061 } 1062 } 1063 1064 for (i = 0; i < pmd->run.num_s2c_rings; i++) { 1065 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_S2C, i); 1066 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED); 1067 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED); 1068 ring->cookie = MEMIF_COOKIE; 1069 ring->flags = 0; 1070 1071 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) 1072 continue; 1073 1074 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) { 1075 slot = (i + pmd->run.num_c2s_rings) * 1076 (1 << pmd->run.log2_ring_size) + j; 1077 ring->desc[j].region = 0; 1078 ring->desc[j].offset = 1079 proc_private->regions[0]->pkt_buffer_offset + 1080 (uint32_t)(slot * pmd->run.pkt_buffer_size); 1081 ring->desc[j].length = pmd->run.pkt_buffer_size; 1082 } 1083 } 1084 } 1085 1086 /* called only by client */ 1087 static int 1088 memif_init_queues(struct rte_eth_dev *dev) 1089 { 1090 struct pmd_internals *pmd = dev->data->dev_private; 1091 struct memif_queue *mq; 1092 int i; 1093 1094 for (i = 0; i < pmd->run.num_c2s_rings; i++) { 1095 mq = dev->data->tx_queues[i]; 1096 mq->log2_ring_size = pmd->run.log2_ring_size; 1097 /* queues located only in region 0 */ 1098 mq->region = 0; 1099 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_C2S, i); 1100 mq->last_head = 0; 1101 mq->last_tail = 0; 1102 if (rte_intr_fd_set(mq->intr_handle, eventfd(0, EFD_NONBLOCK))) 1103 return -rte_errno; 1104 1105 if (rte_intr_fd_get(mq->intr_handle) < 0) { 1106 MIF_LOG(WARNING, 1107 "Failed to create eventfd for tx queue %d: %s.", i, 1108 strerror(errno)); 1109 } 1110 mq->buffers = NULL; 1111 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 1112 mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) * 1113 (1 << mq->log2_ring_size), 0); 1114 if (mq->buffers == NULL) 1115 return -ENOMEM; 1116 } 1117 } 1118 1119 for (i = 0; i < pmd->run.num_s2c_rings; i++) { 1120 mq = dev->data->rx_queues[i]; 1121 mq->log2_ring_size = pmd->run.log2_ring_size; 1122 /* queues located only in region 0 */ 1123 mq->region = 0; 1124 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_S2C, i); 1125 mq->last_head = 0; 1126 mq->last_tail = 0; 1127 if (rte_intr_fd_set(mq->intr_handle, eventfd(0, EFD_NONBLOCK))) 1128 return -rte_errno; 1129 if (rte_intr_fd_get(mq->intr_handle) < 0) { 1130 MIF_LOG(WARNING, 1131 "Failed to create eventfd for rx queue %d: %s.", i, 1132 strerror(errno)); 1133 } 1134 mq->buffers = NULL; 1135 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 1136 mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) * 1137 (1 << mq->log2_ring_size), 0); 1138 if (mq->buffers == NULL) 1139 return -ENOMEM; 1140 } 1141 } 1142 return 0; 1143 } 1144 1145 int 1146 memif_init_regions_and_queues(struct rte_eth_dev *dev) 1147 { 1148 int ret; 1149 1150 ret = memif_regions_init(dev); 1151 if (ret < 0) 1152 return ret; 1153 1154 memif_init_rings(dev); 1155 1156 ret = memif_init_queues(dev); 1157 if (ret < 0) 1158 return ret; 1159 1160 return 0; 1161 } 1162 1163 int 1164 memif_connect(struct rte_eth_dev *dev) 1165 { 1166 struct pmd_internals *pmd = dev->data->dev_private; 1167 struct pmd_process_private *proc_private = dev->process_private; 1168 struct memif_region *mr; 1169 struct memif_queue *mq; 1170 memif_ring_t *ring; 1171 int i; 1172 1173 for (i = 0; i < proc_private->regions_num; i++) { 1174 mr = proc_private->regions[i]; 1175 if (mr != NULL) { 1176 if (mr->addr == NULL) { 1177 if (mr->fd < 0) 1178 return -1; 1179 mr->addr = mmap(NULL, mr->region_size, 1180 PROT_READ | PROT_WRITE, 1181 MAP_SHARED, mr->fd, 0); 1182 if (mr->addr == MAP_FAILED) { 1183 MIF_LOG(ERR, "mmap failed: %s\n", 1184 strerror(errno)); 1185 return -1; 1186 } 1187 } 1188 if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) { 1189 /* close memseg file */ 1190 close(mr->fd); 1191 mr->fd = -1; 1192 } 1193 } 1194 } 1195 1196 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 1197 for (i = 0; i < pmd->run.num_c2s_rings; i++) { 1198 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? 1199 dev->data->tx_queues[i] : dev->data->rx_queues[i]; 1200 ring = memif_get_ring_from_queue(proc_private, mq); 1201 if (ring == NULL || ring->cookie != MEMIF_COOKIE) { 1202 MIF_LOG(ERR, "Wrong ring"); 1203 return -1; 1204 } 1205 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED); 1206 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED); 1207 mq->last_head = 0; 1208 mq->last_tail = 0; 1209 /* enable polling mode */ 1210 if (pmd->role == MEMIF_ROLE_SERVER) 1211 ring->flags = MEMIF_RING_FLAG_MASK_INT; 1212 } 1213 for (i = 0; i < pmd->run.num_s2c_rings; i++) { 1214 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? 1215 dev->data->rx_queues[i] : dev->data->tx_queues[i]; 1216 ring = memif_get_ring_from_queue(proc_private, mq); 1217 if (ring == NULL || ring->cookie != MEMIF_COOKIE) { 1218 MIF_LOG(ERR, "Wrong ring"); 1219 return -1; 1220 } 1221 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED); 1222 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED); 1223 mq->last_head = 0; 1224 mq->last_tail = 0; 1225 /* enable polling mode */ 1226 if (pmd->role == MEMIF_ROLE_CLIENT) 1227 ring->flags = MEMIF_RING_FLAG_MASK_INT; 1228 } 1229 1230 pmd->flags &= ~ETH_MEMIF_FLAG_CONNECTING; 1231 pmd->flags |= ETH_MEMIF_FLAG_CONNECTED; 1232 dev->data->dev_link.link_status = RTE_ETH_LINK_UP; 1233 } 1234 MIF_LOG(INFO, "Connected."); 1235 return 0; 1236 } 1237 1238 static int 1239 memif_dev_start(struct rte_eth_dev *dev) 1240 { 1241 struct pmd_internals *pmd = dev->data->dev_private; 1242 int ret = 0; 1243 1244 switch (pmd->role) { 1245 case MEMIF_ROLE_CLIENT: 1246 ret = memif_connect_client(dev); 1247 break; 1248 case MEMIF_ROLE_SERVER: 1249 ret = memif_connect_server(dev); 1250 break; 1251 default: 1252 MIF_LOG(ERR, "Unknown role: %d.", pmd->role); 1253 ret = -1; 1254 break; 1255 } 1256 1257 return ret; 1258 } 1259 1260 static int 1261 memif_dev_stop(struct rte_eth_dev *dev) 1262 { 1263 memif_disconnect(dev); 1264 return 0; 1265 } 1266 1267 static int 1268 memif_dev_close(struct rte_eth_dev *dev) 1269 { 1270 struct pmd_internals *pmd = dev->data->dev_private; 1271 int i; 1272 1273 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 1274 memif_msg_enq_disconnect(pmd->cc, "Device closed", 0); 1275 1276 for (i = 0; i < dev->data->nb_rx_queues; i++) 1277 (*dev->dev_ops->rx_queue_release)(dev, i); 1278 for (i = 0; i < dev->data->nb_tx_queues; i++) 1279 (*dev->dev_ops->tx_queue_release)(dev, i); 1280 1281 memif_socket_remove_device(dev); 1282 } 1283 1284 rte_free(dev->process_private); 1285 1286 return 0; 1287 } 1288 1289 static int 1290 memif_dev_configure(struct rte_eth_dev *dev) 1291 { 1292 struct pmd_internals *pmd = dev->data->dev_private; 1293 1294 /* 1295 * CLIENT - TXQ 1296 * SERVER - RXQ 1297 */ 1298 pmd->cfg.num_c2s_rings = (pmd->role == MEMIF_ROLE_CLIENT) ? 1299 dev->data->nb_tx_queues : dev->data->nb_rx_queues; 1300 1301 /* 1302 * CLIENT - RXQ 1303 * SERVER - TXQ 1304 */ 1305 pmd->cfg.num_s2c_rings = (pmd->role == MEMIF_ROLE_CLIENT) ? 1306 dev->data->nb_rx_queues : dev->data->nb_tx_queues; 1307 1308 return 0; 1309 } 1310 1311 static int 1312 memif_tx_queue_setup(struct rte_eth_dev *dev, 1313 uint16_t qid, 1314 uint16_t nb_tx_desc __rte_unused, 1315 unsigned int socket_id __rte_unused, 1316 const struct rte_eth_txconf *tx_conf __rte_unused) 1317 { 1318 struct pmd_internals *pmd = dev->data->dev_private; 1319 struct memif_queue *mq; 1320 1321 mq = rte_zmalloc("tx-queue", sizeof(struct memif_queue), 0); 1322 if (mq == NULL) { 1323 MIF_LOG(ERR, "Failed to allocate tx queue id: %u", qid); 1324 return -ENOMEM; 1325 } 1326 1327 /* Allocate interrupt instance */ 1328 mq->intr_handle = rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED); 1329 if (mq->intr_handle == NULL) { 1330 MIF_LOG(ERR, "Failed to allocate intr handle"); 1331 return -ENOMEM; 1332 } 1333 1334 mq->type = 1335 (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_C2S : MEMIF_RING_S2C; 1336 mq->n_pkts = 0; 1337 mq->n_bytes = 0; 1338 1339 if (rte_intr_fd_set(mq->intr_handle, -1)) 1340 return -rte_errno; 1341 1342 if (rte_intr_type_set(mq->intr_handle, RTE_INTR_HANDLE_EXT)) 1343 return -rte_errno; 1344 1345 mq->in_port = dev->data->port_id; 1346 dev->data->tx_queues[qid] = mq; 1347 1348 return 0; 1349 } 1350 1351 static int 1352 memif_rx_queue_setup(struct rte_eth_dev *dev, 1353 uint16_t qid, 1354 uint16_t nb_rx_desc __rte_unused, 1355 unsigned int socket_id __rte_unused, 1356 const struct rte_eth_rxconf *rx_conf __rte_unused, 1357 struct rte_mempool *mb_pool) 1358 { 1359 struct pmd_internals *pmd = dev->data->dev_private; 1360 struct memif_queue *mq; 1361 1362 mq = rte_zmalloc("rx-queue", sizeof(struct memif_queue), 0); 1363 if (mq == NULL) { 1364 MIF_LOG(ERR, "Failed to allocate rx queue id: %u", qid); 1365 return -ENOMEM; 1366 } 1367 1368 /* Allocate interrupt instance */ 1369 mq->intr_handle = rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED); 1370 if (mq->intr_handle == NULL) { 1371 MIF_LOG(ERR, "Failed to allocate intr handle"); 1372 return -ENOMEM; 1373 } 1374 1375 mq->type = (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_S2C : MEMIF_RING_C2S; 1376 mq->n_pkts = 0; 1377 mq->n_bytes = 0; 1378 1379 if (rte_intr_fd_set(mq->intr_handle, -1)) 1380 return -rte_errno; 1381 1382 if (rte_intr_type_set(mq->intr_handle, RTE_INTR_HANDLE_EXT)) 1383 return -rte_errno; 1384 1385 mq->mempool = mb_pool; 1386 mq->in_port = dev->data->port_id; 1387 dev->data->rx_queues[qid] = mq; 1388 1389 return 0; 1390 } 1391 1392 static void 1393 memif_rx_queue_release(struct rte_eth_dev *dev, uint16_t qid) 1394 { 1395 struct memif_queue *mq = dev->data->rx_queues[qid]; 1396 1397 if (!mq) 1398 return; 1399 1400 rte_intr_instance_free(mq->intr_handle); 1401 rte_free(mq); 1402 } 1403 1404 static void 1405 memif_tx_queue_release(struct rte_eth_dev *dev, uint16_t qid) 1406 { 1407 struct memif_queue *mq = dev->data->tx_queues[qid]; 1408 1409 if (!mq) 1410 return; 1411 1412 rte_free(mq); 1413 } 1414 1415 static int 1416 memif_link_update(struct rte_eth_dev *dev, 1417 int wait_to_complete __rte_unused) 1418 { 1419 struct pmd_process_private *proc_private; 1420 1421 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1422 proc_private = dev->process_private; 1423 if (dev->data->dev_link.link_status == RTE_ETH_LINK_UP && 1424 proc_private->regions_num == 0) { 1425 memif_mp_request_regions(dev); 1426 } else if (dev->data->dev_link.link_status == RTE_ETH_LINK_DOWN && 1427 proc_private->regions_num > 0) { 1428 memif_free_regions(dev); 1429 } 1430 } 1431 return 0; 1432 } 1433 1434 static int 1435 memif_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 1436 { 1437 struct pmd_internals *pmd = dev->data->dev_private; 1438 struct memif_queue *mq; 1439 int i; 1440 uint8_t tmp, nq; 1441 1442 stats->ipackets = 0; 1443 stats->ibytes = 0; 1444 stats->opackets = 0; 1445 stats->obytes = 0; 1446 1447 tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_c2s_rings : 1448 pmd->run.num_s2c_rings; 1449 nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp : 1450 RTE_ETHDEV_QUEUE_STAT_CNTRS; 1451 1452 /* RX stats */ 1453 for (i = 0; i < nq; i++) { 1454 mq = dev->data->rx_queues[i]; 1455 stats->q_ipackets[i] = mq->n_pkts; 1456 stats->q_ibytes[i] = mq->n_bytes; 1457 stats->ipackets += mq->n_pkts; 1458 stats->ibytes += mq->n_bytes; 1459 } 1460 1461 tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_s2c_rings : 1462 pmd->run.num_c2s_rings; 1463 nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp : 1464 RTE_ETHDEV_QUEUE_STAT_CNTRS; 1465 1466 /* TX stats */ 1467 for (i = 0; i < nq; i++) { 1468 mq = dev->data->tx_queues[i]; 1469 stats->q_opackets[i] = mq->n_pkts; 1470 stats->q_obytes[i] = mq->n_bytes; 1471 stats->opackets += mq->n_pkts; 1472 stats->obytes += mq->n_bytes; 1473 } 1474 return 0; 1475 } 1476 1477 static int 1478 memif_stats_reset(struct rte_eth_dev *dev) 1479 { 1480 struct pmd_internals *pmd = dev->data->dev_private; 1481 int i; 1482 struct memif_queue *mq; 1483 1484 for (i = 0; i < pmd->run.num_c2s_rings; i++) { 1485 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->tx_queues[i] : 1486 dev->data->rx_queues[i]; 1487 mq->n_pkts = 0; 1488 mq->n_bytes = 0; 1489 } 1490 for (i = 0; i < pmd->run.num_s2c_rings; i++) { 1491 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->rx_queues[i] : 1492 dev->data->tx_queues[i]; 1493 mq->n_pkts = 0; 1494 mq->n_bytes = 0; 1495 } 1496 1497 return 0; 1498 } 1499 1500 static const struct eth_dev_ops ops = { 1501 .dev_start = memif_dev_start, 1502 .dev_stop = memif_dev_stop, 1503 .dev_close = memif_dev_close, 1504 .dev_infos_get = memif_dev_info, 1505 .dev_configure = memif_dev_configure, 1506 .tx_queue_setup = memif_tx_queue_setup, 1507 .rx_queue_setup = memif_rx_queue_setup, 1508 .rx_queue_release = memif_rx_queue_release, 1509 .tx_queue_release = memif_tx_queue_release, 1510 .link_update = memif_link_update, 1511 .stats_get = memif_stats_get, 1512 .stats_reset = memif_stats_reset, 1513 }; 1514 1515 static int 1516 memif_create(struct rte_vdev_device *vdev, enum memif_role_t role, 1517 memif_interface_id_t id, uint32_t flags, 1518 const char *socket_filename, 1519 memif_log2_ring_size_t log2_ring_size, 1520 uint16_t pkt_buffer_size, const char *secret, 1521 struct rte_ether_addr *ether_addr) 1522 { 1523 int ret = 0; 1524 struct rte_eth_dev *eth_dev; 1525 struct rte_eth_dev_data *data; 1526 struct pmd_internals *pmd; 1527 struct pmd_process_private *process_private; 1528 const unsigned int numa_node = vdev->device.numa_node; 1529 const char *name = rte_vdev_device_name(vdev); 1530 1531 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd)); 1532 if (eth_dev == NULL) { 1533 MIF_LOG(ERR, "%s: Unable to allocate device struct.", name); 1534 return -1; 1535 } 1536 1537 process_private = (struct pmd_process_private *) 1538 rte_zmalloc(name, sizeof(struct pmd_process_private), 1539 RTE_CACHE_LINE_SIZE); 1540 1541 if (process_private == NULL) { 1542 MIF_LOG(ERR, "Failed to alloc memory for process private"); 1543 return -1; 1544 } 1545 eth_dev->process_private = process_private; 1546 1547 pmd = eth_dev->data->dev_private; 1548 memset(pmd, 0, sizeof(*pmd)); 1549 1550 pmd->id = id; 1551 pmd->flags = flags; 1552 pmd->flags |= ETH_MEMIF_FLAG_DISABLED; 1553 pmd->role = role; 1554 /* Zero-copy flag irelevant to server. */ 1555 if (pmd->role == MEMIF_ROLE_SERVER) 1556 pmd->flags &= ~ETH_MEMIF_FLAG_ZERO_COPY; 1557 1558 ret = memif_socket_init(eth_dev, socket_filename); 1559 if (ret < 0) 1560 return ret; 1561 1562 memset(pmd->secret, 0, sizeof(char) * ETH_MEMIF_SECRET_SIZE); 1563 if (secret != NULL) 1564 strlcpy(pmd->secret, secret, sizeof(pmd->secret)); 1565 1566 pmd->cfg.log2_ring_size = log2_ring_size; 1567 /* set in .dev_configure() */ 1568 pmd->cfg.num_c2s_rings = 0; 1569 pmd->cfg.num_s2c_rings = 0; 1570 1571 pmd->cfg.pkt_buffer_size = pkt_buffer_size; 1572 rte_spinlock_init(&pmd->cc_lock); 1573 1574 data = eth_dev->data; 1575 data->dev_private = pmd; 1576 data->numa_node = numa_node; 1577 data->dev_link = pmd_link; 1578 data->mac_addrs = ether_addr; 1579 data->promiscuous = 1; 1580 data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS; 1581 1582 eth_dev->dev_ops = &ops; 1583 eth_dev->device = &vdev->device; 1584 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 1585 eth_dev->rx_pkt_burst = eth_memif_rx_zc; 1586 eth_dev->tx_pkt_burst = eth_memif_tx_zc; 1587 } else { 1588 eth_dev->rx_pkt_burst = eth_memif_rx; 1589 eth_dev->tx_pkt_burst = eth_memif_tx; 1590 } 1591 1592 rte_eth_dev_probing_finish(eth_dev); 1593 1594 return 0; 1595 } 1596 1597 static int 1598 memif_set_role(const char *key __rte_unused, const char *value, 1599 void *extra_args) 1600 { 1601 enum memif_role_t *role = (enum memif_role_t *)extra_args; 1602 1603 if (strstr(value, "server") != NULL) { 1604 *role = MEMIF_ROLE_SERVER; 1605 } else if (strstr(value, "client") != NULL) { 1606 *role = MEMIF_ROLE_CLIENT; 1607 } else if (strstr(value, "master") != NULL) { 1608 MIF_LOG(NOTICE, "Role argument \"master\" is deprecated, use \"server\""); 1609 *role = MEMIF_ROLE_SERVER; 1610 } else if (strstr(value, "slave") != NULL) { 1611 MIF_LOG(NOTICE, "Role argument \"slave\" is deprecated, use \"client\""); 1612 *role = MEMIF_ROLE_CLIENT; 1613 } else { 1614 MIF_LOG(ERR, "Unknown role: %s.", value); 1615 return -EINVAL; 1616 } 1617 return 0; 1618 } 1619 1620 static int 1621 memif_set_zc(const char *key __rte_unused, const char *value, void *extra_args) 1622 { 1623 uint32_t *flags = (uint32_t *)extra_args; 1624 1625 if (strstr(value, "yes") != NULL) { 1626 if (!rte_mcfg_get_single_file_segments()) { 1627 MIF_LOG(ERR, "Zero-copy doesn't support multi-file segments."); 1628 return -ENOTSUP; 1629 } 1630 *flags |= ETH_MEMIF_FLAG_ZERO_COPY; 1631 } else if (strstr(value, "no") != NULL) { 1632 *flags &= ~ETH_MEMIF_FLAG_ZERO_COPY; 1633 } else { 1634 MIF_LOG(ERR, "Failed to parse zero-copy param: %s.", value); 1635 return -EINVAL; 1636 } 1637 return 0; 1638 } 1639 1640 static int 1641 memif_set_id(const char *key __rte_unused, const char *value, void *extra_args) 1642 { 1643 memif_interface_id_t *id = (memif_interface_id_t *)extra_args; 1644 1645 /* even if parsing fails, 0 is a valid id */ 1646 *id = strtoul(value, NULL, 10); 1647 return 0; 1648 } 1649 1650 static int 1651 memif_set_bs(const char *key __rte_unused, const char *value, void *extra_args) 1652 { 1653 unsigned long tmp; 1654 uint16_t *pkt_buffer_size = (uint16_t *)extra_args; 1655 1656 tmp = strtoul(value, NULL, 10); 1657 if (tmp == 0 || tmp > 0xFFFF) { 1658 MIF_LOG(ERR, "Invalid buffer size: %s.", value); 1659 return -EINVAL; 1660 } 1661 *pkt_buffer_size = tmp; 1662 return 0; 1663 } 1664 1665 static int 1666 memif_set_rs(const char *key __rte_unused, const char *value, void *extra_args) 1667 { 1668 unsigned long tmp; 1669 memif_log2_ring_size_t *log2_ring_size = 1670 (memif_log2_ring_size_t *)extra_args; 1671 1672 tmp = strtoul(value, NULL, 10); 1673 if (tmp == 0 || tmp > ETH_MEMIF_MAX_LOG2_RING_SIZE) { 1674 MIF_LOG(ERR, "Invalid ring size: %s (max %u).", 1675 value, ETH_MEMIF_MAX_LOG2_RING_SIZE); 1676 return -EINVAL; 1677 } 1678 *log2_ring_size = tmp; 1679 return 0; 1680 } 1681 1682 /* check if directory exists and if we have permission to read/write */ 1683 static int 1684 memif_check_socket_filename(const char *filename) 1685 { 1686 char *dir = NULL, *tmp; 1687 uint32_t idx; 1688 int ret = 0; 1689 1690 if (strlen(filename) >= MEMIF_SOCKET_UN_SIZE) { 1691 MIF_LOG(ERR, "Unix socket address too long (max 108)."); 1692 return -1; 1693 } 1694 1695 tmp = strrchr(filename, '/'); 1696 if (tmp != NULL) { 1697 idx = tmp - filename; 1698 dir = rte_zmalloc("memif_tmp", sizeof(char) * (idx + 1), 0); 1699 if (dir == NULL) { 1700 MIF_LOG(ERR, "Failed to allocate memory."); 1701 return -1; 1702 } 1703 strlcpy(dir, filename, sizeof(char) * (idx + 1)); 1704 } 1705 1706 if (dir == NULL || (faccessat(-1, dir, F_OK | R_OK | 1707 W_OK, AT_EACCESS) < 0)) { 1708 MIF_LOG(ERR, "Invalid socket directory."); 1709 ret = -EINVAL; 1710 } 1711 1712 rte_free(dir); 1713 1714 return ret; 1715 } 1716 1717 static int 1718 memif_set_socket_filename(const char *key __rte_unused, const char *value, 1719 void *extra_args) 1720 { 1721 const char **socket_filename = (const char **)extra_args; 1722 1723 *socket_filename = value; 1724 return 0; 1725 } 1726 1727 static int 1728 memif_set_is_socket_abstract(const char *key __rte_unused, const char *value, void *extra_args) 1729 { 1730 uint32_t *flags = (uint32_t *)extra_args; 1731 1732 if (strstr(value, "yes") != NULL) { 1733 *flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT; 1734 } else if (strstr(value, "no") != NULL) { 1735 *flags &= ~ETH_MEMIF_FLAG_SOCKET_ABSTRACT; 1736 } else { 1737 MIF_LOG(ERR, "Failed to parse socket-abstract param: %s.", value); 1738 return -EINVAL; 1739 } 1740 return 0; 1741 } 1742 1743 static int 1744 memif_set_mac(const char *key __rte_unused, const char *value, void *extra_args) 1745 { 1746 struct rte_ether_addr *ether_addr = (struct rte_ether_addr *)extra_args; 1747 1748 if (rte_ether_unformat_addr(value, ether_addr) < 0) 1749 MIF_LOG(WARNING, "Failed to parse mac '%s'.", value); 1750 return 0; 1751 } 1752 1753 static int 1754 memif_set_secret(const char *key __rte_unused, const char *value, void *extra_args) 1755 { 1756 const char **secret = (const char **)extra_args; 1757 1758 *secret = value; 1759 return 0; 1760 } 1761 1762 static int 1763 rte_pmd_memif_probe(struct rte_vdev_device *vdev) 1764 { 1765 RTE_BUILD_BUG_ON(sizeof(memif_msg_t) != 128); 1766 RTE_BUILD_BUG_ON(sizeof(memif_desc_t) != 16); 1767 int ret = 0; 1768 struct rte_kvargs *kvlist; 1769 const char *name = rte_vdev_device_name(vdev); 1770 enum memif_role_t role = MEMIF_ROLE_CLIENT; 1771 memif_interface_id_t id = 0; 1772 uint16_t pkt_buffer_size = ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE; 1773 memif_log2_ring_size_t log2_ring_size = ETH_MEMIF_DEFAULT_RING_SIZE; 1774 const char *socket_filename = ETH_MEMIF_DEFAULT_SOCKET_FILENAME; 1775 uint32_t flags = 0; 1776 const char *secret = NULL; 1777 struct rte_ether_addr *ether_addr = rte_zmalloc("", 1778 sizeof(struct rte_ether_addr), 0); 1779 struct rte_eth_dev *eth_dev; 1780 1781 rte_eth_random_addr(ether_addr->addr_bytes); 1782 1783 MIF_LOG(INFO, "Initialize MEMIF: %s.", name); 1784 1785 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1786 eth_dev = rte_eth_dev_attach_secondary(name); 1787 if (!eth_dev) { 1788 MIF_LOG(ERR, "Failed to probe %s", name); 1789 return -1; 1790 } 1791 1792 eth_dev->dev_ops = &ops; 1793 eth_dev->device = &vdev->device; 1794 eth_dev->rx_pkt_burst = eth_memif_rx; 1795 eth_dev->tx_pkt_burst = eth_memif_tx; 1796 1797 if (!rte_eal_primary_proc_alive(NULL)) { 1798 MIF_LOG(ERR, "Primary process is missing"); 1799 return -1; 1800 } 1801 1802 eth_dev->process_private = (struct pmd_process_private *) 1803 rte_zmalloc(name, 1804 sizeof(struct pmd_process_private), 1805 RTE_CACHE_LINE_SIZE); 1806 if (eth_dev->process_private == NULL) { 1807 MIF_LOG(ERR, 1808 "Failed to alloc memory for process private"); 1809 return -1; 1810 } 1811 1812 rte_eth_dev_probing_finish(eth_dev); 1813 1814 return 0; 1815 } 1816 1817 ret = rte_mp_action_register(MEMIF_MP_SEND_REGION, memif_mp_send_region); 1818 /* 1819 * Primary process can continue probing, but secondary process won't 1820 * be able to get memory regions information 1821 */ 1822 if (ret < 0 && rte_errno != EEXIST) 1823 MIF_LOG(WARNING, "Failed to register mp action callback: %s", 1824 strerror(rte_errno)); 1825 1826 /* use abstract address by default */ 1827 flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT; 1828 1829 kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_arguments); 1830 1831 /* parse parameters */ 1832 if (kvlist != NULL) { 1833 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ROLE_ARG, 1834 &memif_set_role, &role); 1835 if (ret < 0) 1836 goto exit; 1837 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ID_ARG, 1838 &memif_set_id, &id); 1839 if (ret < 0) 1840 goto exit; 1841 ret = rte_kvargs_process(kvlist, ETH_MEMIF_PKT_BUFFER_SIZE_ARG, 1842 &memif_set_bs, &pkt_buffer_size); 1843 if (ret < 0) 1844 goto exit; 1845 ret = rte_kvargs_process(kvlist, ETH_MEMIF_RING_SIZE_ARG, 1846 &memif_set_rs, &log2_ring_size); 1847 if (ret < 0) 1848 goto exit; 1849 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ARG, 1850 &memif_set_socket_filename, 1851 (void *)(&socket_filename)); 1852 if (ret < 0) 1853 goto exit; 1854 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ABSTRACT_ARG, 1855 &memif_set_is_socket_abstract, &flags); 1856 if (ret < 0) 1857 goto exit; 1858 ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG, 1859 &memif_set_mac, ether_addr); 1860 if (ret < 0) 1861 goto exit; 1862 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ZC_ARG, 1863 &memif_set_zc, &flags); 1864 if (ret < 0) 1865 goto exit; 1866 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SECRET_ARG, 1867 &memif_set_secret, (void *)(&secret)); 1868 if (ret < 0) 1869 goto exit; 1870 } 1871 1872 if (!(flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT)) { 1873 ret = memif_check_socket_filename(socket_filename); 1874 if (ret < 0) 1875 goto exit; 1876 } 1877 1878 /* create interface */ 1879 ret = memif_create(vdev, role, id, flags, socket_filename, 1880 log2_ring_size, pkt_buffer_size, secret, ether_addr); 1881 1882 exit: 1883 rte_kvargs_free(kvlist); 1884 return ret; 1885 } 1886 1887 static int 1888 rte_pmd_memif_remove(struct rte_vdev_device *vdev) 1889 { 1890 struct rte_eth_dev *eth_dev; 1891 1892 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(vdev)); 1893 if (eth_dev == NULL) 1894 return 0; 1895 1896 return rte_eth_dev_close(eth_dev->data->port_id); 1897 } 1898 1899 static struct rte_vdev_driver pmd_memif_drv = { 1900 .probe = rte_pmd_memif_probe, 1901 .remove = rte_pmd_memif_remove, 1902 }; 1903 1904 RTE_PMD_REGISTER_VDEV(net_memif, pmd_memif_drv); 1905 1906 RTE_PMD_REGISTER_PARAM_STRING(net_memif, 1907 ETH_MEMIF_ID_ARG "=<int>" 1908 ETH_MEMIF_ROLE_ARG "=server|client" 1909 ETH_MEMIF_PKT_BUFFER_SIZE_ARG "=<int>" 1910 ETH_MEMIF_RING_SIZE_ARG "=<int>" 1911 ETH_MEMIF_SOCKET_ARG "=<string>" 1912 ETH_MEMIF_SOCKET_ABSTRACT_ARG "=yes|no" 1913 ETH_MEMIF_MAC_ARG "=xx:xx:xx:xx:xx:xx" 1914 ETH_MEMIF_ZC_ARG "=yes|no" 1915 ETH_MEMIF_SECRET_ARG "=<string>"); 1916 1917 RTE_LOG_REGISTER_DEFAULT(memif_logtype, NOTICE); 1918