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 uint16_t port_id; 92 int ret; 93 94 /* Get requested port */ 95 ret = rte_eth_dev_get_port_by_name(msg_param->port_name, &port_id); 96 if (ret) { 97 MIF_LOG(ERR, "Failed to get port id for %s", 98 msg_param->port_name); 99 return -1; 100 } 101 dev = &rte_eth_devices[port_id]; 102 proc_private = dev->process_private; 103 104 memset(&reply, 0, sizeof(reply)); 105 strlcpy(reply.name, msg->name, sizeof(reply.name)); 106 reply_param->idx = msg_param->idx; 107 if (proc_private->regions[msg_param->idx] != NULL) { 108 reply_param->size = proc_private->regions[msg_param->idx]->region_size; 109 reply.fds[0] = proc_private->regions[msg_param->idx]->fd; 110 reply.num_fds = 1; 111 } 112 reply.len_param = sizeof(*reply_param); 113 if (rte_mp_reply(&reply, peer) < 0) { 114 MIF_LOG(ERR, "Failed to reply to an add region request"); 115 return -1; 116 } 117 118 return 0; 119 } 120 121 /* 122 * Request regions 123 * Called by secondary process, when ports link status goes up. 124 */ 125 static int 126 memif_mp_request_regions(struct rte_eth_dev *dev) 127 { 128 int ret, i; 129 struct timespec timeout = {.tv_sec = 5, .tv_nsec = 0}; 130 struct rte_mp_msg msg, *reply; 131 struct rte_mp_reply replies; 132 struct mp_region_msg *msg_param = (struct mp_region_msg *)msg.param; 133 struct mp_region_msg *reply_param; 134 struct memif_region *r; 135 struct pmd_process_private *proc_private = dev->process_private; 136 struct pmd_internals *pmd = dev->data->dev_private; 137 /* in case of zero-copy client, only request region 0 */ 138 uint16_t max_region_num = (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) ? 139 1 : ETH_MEMIF_MAX_REGION_NUM; 140 141 MIF_LOG(DEBUG, "Requesting memory regions"); 142 143 for (i = 0; i < max_region_num; i++) { 144 /* Prepare the message */ 145 memset(&msg, 0, sizeof(msg)); 146 strlcpy(msg.name, MEMIF_MP_SEND_REGION, sizeof(msg.name)); 147 strlcpy(msg_param->port_name, dev->data->name, 148 sizeof(msg_param->port_name)); 149 msg_param->idx = i; 150 msg.len_param = sizeof(*msg_param); 151 152 /* Send message */ 153 ret = rte_mp_request_sync(&msg, &replies, &timeout); 154 if (ret < 0 || replies.nb_received != 1) { 155 MIF_LOG(ERR, "Failed to send mp msg: %d", 156 rte_errno); 157 return -1; 158 } 159 160 reply = &replies.msgs[0]; 161 reply_param = (struct mp_region_msg *)reply->param; 162 163 if (reply_param->size > 0) { 164 r = rte_zmalloc("region", sizeof(struct memif_region), 0); 165 if (r == NULL) { 166 MIF_LOG(ERR, "Failed to alloc memif region."); 167 free(reply); 168 return -ENOMEM; 169 } 170 r->region_size = reply_param->size; 171 if (reply->num_fds < 1) { 172 MIF_LOG(ERR, "Missing file descriptor."); 173 free(reply); 174 return -1; 175 } 176 r->fd = reply->fds[0]; 177 r->addr = NULL; 178 179 proc_private->regions[reply_param->idx] = r; 180 proc_private->regions_num++; 181 } 182 free(reply); 183 } 184 185 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 186 ret = rte_memseg_walk(memif_region_init_zc, (void *)proc_private); 187 if (ret < 0) 188 return ret; 189 } 190 191 return memif_connect(dev); 192 } 193 194 static int 195 memif_dev_info(struct rte_eth_dev *dev __rte_unused, struct rte_eth_dev_info *dev_info) 196 { 197 dev_info->max_mac_addrs = 1; 198 dev_info->max_rx_pktlen = RTE_ETHER_MAX_LEN; 199 dev_info->max_rx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS; 200 dev_info->max_tx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS; 201 dev_info->min_rx_bufsize = 0; 202 dev_info->tx_offload_capa = RTE_ETH_TX_OFFLOAD_MULTI_SEGS; 203 204 return 0; 205 } 206 207 static memif_ring_t * 208 memif_get_ring(struct pmd_internals *pmd, struct pmd_process_private *proc_private, 209 memif_ring_type_t type, uint16_t ring_num) 210 { 211 /* rings only in region 0 */ 212 void *p = proc_private->regions[0]->addr; 213 int ring_size = sizeof(memif_ring_t) + sizeof(memif_desc_t) * 214 (1 << pmd->run.log2_ring_size); 215 216 p = (uint8_t *)p + (ring_num + type * pmd->run.num_c2s_rings) * ring_size; 217 218 return (memif_ring_t *)p; 219 } 220 221 static memif_region_offset_t 222 memif_get_ring_offset(struct rte_eth_dev *dev, struct memif_queue *mq, 223 memif_ring_type_t type, uint16_t num) 224 { 225 struct pmd_internals *pmd = dev->data->dev_private; 226 struct pmd_process_private *proc_private = dev->process_private; 227 228 return ((uint8_t *)memif_get_ring(pmd, proc_private, type, num) - 229 (uint8_t *)proc_private->regions[mq->region]->addr); 230 } 231 232 static memif_ring_t * 233 memif_get_ring_from_queue(struct pmd_process_private *proc_private, 234 struct memif_queue *mq) 235 { 236 struct memif_region *r; 237 238 r = proc_private->regions[mq->region]; 239 if (r == NULL) 240 return NULL; 241 242 return (memif_ring_t *)((uint8_t *)r->addr + mq->ring_offset); 243 } 244 245 static void * 246 memif_get_buffer(struct pmd_process_private *proc_private, memif_desc_t *d) 247 { 248 return ((uint8_t *)proc_private->regions[d->region]->addr + d->offset); 249 } 250 251 /* Free mbufs received by server */ 252 static void 253 memif_free_stored_mbufs(struct pmd_process_private *proc_private, struct memif_queue *mq) 254 { 255 uint16_t cur_tail; 256 uint16_t mask = (1 << mq->log2_ring_size) - 1; 257 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 258 259 /* FIXME: improve performance */ 260 /* The ring->tail acts as a guard variable between Tx and Rx 261 * threads, so using load-acquire pairs with store-release 262 * in function eth_memif_rx for C2S queues. 263 */ 264 cur_tail = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE); 265 while (mq->last_tail != cur_tail) { 266 RTE_MBUF_PREFETCH_TO_FREE(mq->buffers[(mq->last_tail + 1) & mask]); 267 /* Decrement refcnt and free mbuf. (current segment) */ 268 rte_mbuf_refcnt_update(mq->buffers[mq->last_tail & mask], -1); 269 rte_pktmbuf_free_seg(mq->buffers[mq->last_tail & mask]); 270 mq->last_tail++; 271 } 272 } 273 274 static int 275 memif_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *cur_tail, 276 struct rte_mbuf *tail) 277 { 278 /* Check for number-of-segments-overflow */ 279 if (unlikely(head->nb_segs + tail->nb_segs > RTE_MBUF_MAX_NB_SEGS)) 280 return -EOVERFLOW; 281 282 /* Chain 'tail' onto the old tail */ 283 cur_tail->next = tail; 284 285 /* accumulate number of segments and total length. */ 286 head->nb_segs = (uint16_t)(head->nb_segs + tail->nb_segs); 287 288 tail->pkt_len = tail->data_len; 289 head->pkt_len += tail->pkt_len; 290 291 return 0; 292 } 293 294 static uint16_t 295 eth_memif_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 296 { 297 struct memif_queue *mq = queue; 298 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private; 299 struct pmd_process_private *proc_private = 300 rte_eth_devices[mq->in_port].process_private; 301 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 302 uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0; 303 uint16_t n_rx_pkts = 0; 304 uint16_t mbuf_size = rte_pktmbuf_data_room_size(mq->mempool) - 305 RTE_PKTMBUF_HEADROOM; 306 uint16_t src_len, src_off, dst_len, dst_off, cp_len; 307 memif_ring_type_t type = mq->type; 308 memif_desc_t *d0; 309 struct rte_mbuf *mbuf, *mbuf_head, *mbuf_tail; 310 uint64_t b; 311 ssize_t size __rte_unused; 312 uint16_t head; 313 int ret; 314 struct rte_eth_link link; 315 316 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0)) 317 return 0; 318 if (unlikely(ring == NULL)) { 319 /* Secondary process will attempt to request regions. */ 320 ret = rte_eth_link_get(mq->in_port, &link); 321 if (ret < 0) 322 MIF_LOG(ERR, "Failed to get port %u link info: %s", 323 mq->in_port, rte_strerror(-ret)); 324 return 0; 325 } 326 327 /* consume interrupt */ 328 if (((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) && 329 (rte_intr_fd_get(mq->intr_handle) >= 0)) 330 size = read(rte_intr_fd_get(mq->intr_handle), &b, 331 sizeof(b)); 332 333 ring_size = 1 << mq->log2_ring_size; 334 mask = ring_size - 1; 335 336 if (type == MEMIF_RING_C2S) { 337 cur_slot = mq->last_head; 338 last_slot = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE); 339 } else { 340 cur_slot = mq->last_tail; 341 last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE); 342 } 343 344 if (cur_slot == last_slot) 345 goto refill; 346 n_slots = last_slot - cur_slot; 347 348 while (n_slots && n_rx_pkts < nb_pkts) { 349 mbuf_head = rte_pktmbuf_alloc(mq->mempool); 350 if (unlikely(mbuf_head == NULL)) 351 goto no_free_bufs; 352 mbuf = mbuf_head; 353 mbuf->port = mq->in_port; 354 355 next_slot: 356 s0 = cur_slot & mask; 357 d0 = &ring->desc[s0]; 358 359 src_len = d0->length; 360 dst_off = 0; 361 src_off = 0; 362 363 do { 364 dst_len = mbuf_size - dst_off; 365 if (dst_len == 0) { 366 dst_off = 0; 367 dst_len = mbuf_size; 368 369 /* store pointer to tail */ 370 mbuf_tail = mbuf; 371 mbuf = rte_pktmbuf_alloc(mq->mempool); 372 if (unlikely(mbuf == NULL)) 373 goto no_free_bufs; 374 mbuf->port = mq->in_port; 375 ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf); 376 if (unlikely(ret < 0)) { 377 MIF_LOG(ERR, "number-of-segments-overflow"); 378 rte_pktmbuf_free(mbuf); 379 goto no_free_bufs; 380 } 381 } 382 cp_len = RTE_MIN(dst_len, src_len); 383 384 rte_pktmbuf_data_len(mbuf) += cp_len; 385 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf); 386 if (mbuf != mbuf_head) 387 rte_pktmbuf_pkt_len(mbuf_head) += cp_len; 388 389 rte_memcpy(rte_pktmbuf_mtod_offset(mbuf, void *, 390 dst_off), 391 (uint8_t *)memif_get_buffer(proc_private, d0) + 392 src_off, cp_len); 393 394 src_off += cp_len; 395 dst_off += cp_len; 396 src_len -= cp_len; 397 } while (src_len); 398 399 cur_slot++; 400 n_slots--; 401 402 if (d0->flags & MEMIF_DESC_FLAG_NEXT) 403 goto next_slot; 404 405 mq->n_bytes += rte_pktmbuf_pkt_len(mbuf_head); 406 *bufs++ = mbuf_head; 407 n_rx_pkts++; 408 } 409 410 no_free_bufs: 411 if (type == MEMIF_RING_C2S) { 412 __atomic_store_n(&ring->tail, cur_slot, __ATOMIC_RELEASE); 413 mq->last_head = cur_slot; 414 } else { 415 mq->last_tail = cur_slot; 416 } 417 418 refill: 419 if (type == MEMIF_RING_S2C) { 420 /* ring->head is updated by the receiver and this function 421 * is called in the context of receiver thread. The loads in 422 * the receiver do not need to synchronize with its own stores. 423 */ 424 head = __atomic_load_n(&ring->head, __ATOMIC_RELAXED); 425 n_slots = ring_size - head + mq->last_tail; 426 427 while (n_slots--) { 428 s0 = head++ & mask; 429 d0 = &ring->desc[s0]; 430 d0->length = pmd->run.pkt_buffer_size; 431 } 432 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE); 433 } 434 435 mq->n_pkts += n_rx_pkts; 436 return n_rx_pkts; 437 } 438 439 static uint16_t 440 eth_memif_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 441 { 442 struct memif_queue *mq = queue; 443 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private; 444 struct pmd_process_private *proc_private = 445 rte_eth_devices[mq->in_port].process_private; 446 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 447 uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0, head; 448 uint16_t n_rx_pkts = 0; 449 memif_desc_t *d0; 450 struct rte_mbuf *mbuf, *mbuf_tail; 451 struct rte_mbuf *mbuf_head = NULL; 452 int ret; 453 struct rte_eth_link link; 454 455 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0)) 456 return 0; 457 if (unlikely(ring == NULL)) { 458 /* Secondary process will attempt to request regions. */ 459 rte_eth_link_get(mq->in_port, &link); 460 return 0; 461 } 462 463 /* consume interrupt */ 464 if ((rte_intr_fd_get(mq->intr_handle) >= 0) && 465 ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)) { 466 uint64_t b; 467 ssize_t size __rte_unused; 468 size = read(rte_intr_fd_get(mq->intr_handle), &b, 469 sizeof(b)); 470 } 471 472 ring_size = 1 << mq->log2_ring_size; 473 mask = ring_size - 1; 474 475 cur_slot = mq->last_tail; 476 /* The ring->tail acts as a guard variable between Tx and Rx 477 * threads, so using load-acquire pairs with store-release 478 * to synchronize it between threads. 479 */ 480 last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE); 481 if (cur_slot == last_slot) 482 goto refill; 483 n_slots = last_slot - cur_slot; 484 485 while (n_slots && n_rx_pkts < nb_pkts) { 486 s0 = cur_slot & mask; 487 488 d0 = &ring->desc[s0]; 489 mbuf_head = mq->buffers[s0]; 490 mbuf = mbuf_head; 491 492 next_slot: 493 /* prefetch next descriptor */ 494 if (n_rx_pkts + 1 < nb_pkts) 495 rte_prefetch0(&ring->desc[(cur_slot + 1) & mask]); 496 497 mbuf->port = mq->in_port; 498 rte_pktmbuf_data_len(mbuf) = d0->length; 499 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf); 500 501 mq->n_bytes += rte_pktmbuf_data_len(mbuf); 502 503 cur_slot++; 504 n_slots--; 505 if (d0->flags & MEMIF_DESC_FLAG_NEXT) { 506 s0 = cur_slot & mask; 507 d0 = &ring->desc[s0]; 508 mbuf_tail = mbuf; 509 mbuf = mq->buffers[s0]; 510 ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf); 511 if (unlikely(ret < 0)) { 512 MIF_LOG(ERR, "number-of-segments-overflow"); 513 goto refill; 514 } 515 goto next_slot; 516 } 517 518 *bufs++ = mbuf_head; 519 n_rx_pkts++; 520 } 521 522 mq->last_tail = cur_slot; 523 524 /* Supply server with new buffers */ 525 refill: 526 /* ring->head is updated by the receiver and this function 527 * is called in the context of receiver thread. The loads in 528 * the receiver do not need to synchronize with its own stores. 529 */ 530 head = __atomic_load_n(&ring->head, __ATOMIC_RELAXED); 531 n_slots = ring_size - head + mq->last_tail; 532 533 if (n_slots < 32) 534 goto no_free_mbufs; 535 536 ret = rte_pktmbuf_alloc_bulk(mq->mempool, &mq->buffers[head & mask], n_slots); 537 if (unlikely(ret < 0)) 538 goto no_free_mbufs; 539 540 while (n_slots--) { 541 s0 = head++ & mask; 542 if (n_slots > 0) 543 rte_prefetch0(mq->buffers[head & mask]); 544 d0 = &ring->desc[s0]; 545 /* store buffer header */ 546 mbuf = mq->buffers[s0]; 547 /* populate descriptor */ 548 d0->length = rte_pktmbuf_data_room_size(mq->mempool) - 549 RTE_PKTMBUF_HEADROOM; 550 d0->region = 1; 551 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) - 552 (uint8_t *)proc_private->regions[d0->region]->addr; 553 } 554 no_free_mbufs: 555 /* The ring->head acts as a guard variable between Tx and Rx 556 * threads, so using store-release pairs with load-acquire 557 * in function eth_memif_tx. 558 */ 559 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE); 560 561 mq->n_pkts += n_rx_pkts; 562 563 return n_rx_pkts; 564 } 565 566 static uint16_t 567 eth_memif_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 568 { 569 struct memif_queue *mq = queue; 570 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private; 571 struct pmd_process_private *proc_private = 572 rte_eth_devices[mq->in_port].process_private; 573 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 574 uint16_t slot, saved_slot, n_free, ring_size, mask, n_tx_pkts = 0; 575 uint16_t src_len, src_off, dst_len, dst_off, cp_len, nb_segs; 576 memif_ring_type_t type = mq->type; 577 memif_desc_t *d0; 578 struct rte_mbuf *mbuf; 579 struct rte_mbuf *mbuf_head; 580 uint64_t a; 581 ssize_t size; 582 struct rte_eth_link link; 583 584 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0)) 585 return 0; 586 if (unlikely(ring == NULL)) { 587 int ret; 588 589 /* Secondary process will attempt to request regions. */ 590 ret = rte_eth_link_get(mq->in_port, &link); 591 if (ret < 0) 592 MIF_LOG(ERR, "Failed to get port %u link info: %s", 593 mq->in_port, rte_strerror(-ret)); 594 return 0; 595 } 596 597 ring_size = 1 << mq->log2_ring_size; 598 mask = ring_size - 1; 599 600 if (type == MEMIF_RING_C2S) { 601 /* For C2S queues ring->head is updated by the sender and 602 * this function is called in the context of sending thread. 603 * The loads in the sender do not need to synchronize with 604 * its own stores. Hence, the following load can be a 605 * relaxed load. 606 */ 607 slot = __atomic_load_n(&ring->head, __ATOMIC_RELAXED); 608 n_free = ring_size - slot + 609 __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE); 610 } else { 611 /* For S2C queues ring->tail is updated by the sender and 612 * this function is called in the context of sending thread. 613 * The loads in the sender do not need to synchronize with 614 * its own stores. Hence, the following load can be a 615 * relaxed load. 616 */ 617 slot = __atomic_load_n(&ring->tail, __ATOMIC_RELAXED); 618 n_free = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE) - slot; 619 } 620 621 while (n_tx_pkts < nb_pkts && n_free) { 622 mbuf_head = *bufs++; 623 nb_segs = mbuf_head->nb_segs; 624 mbuf = mbuf_head; 625 626 saved_slot = slot; 627 d0 = &ring->desc[slot & mask]; 628 dst_off = 0; 629 dst_len = (type == MEMIF_RING_C2S) ? 630 pmd->run.pkt_buffer_size : d0->length; 631 632 next_in_chain: 633 src_off = 0; 634 src_len = rte_pktmbuf_data_len(mbuf); 635 636 while (src_len) { 637 if (dst_len == 0) { 638 if (n_free) { 639 slot++; 640 n_free--; 641 d0->flags |= MEMIF_DESC_FLAG_NEXT; 642 d0 = &ring->desc[slot & mask]; 643 dst_off = 0; 644 dst_len = (type == MEMIF_RING_C2S) ? 645 pmd->run.pkt_buffer_size : d0->length; 646 d0->flags = 0; 647 } else { 648 slot = saved_slot; 649 goto no_free_slots; 650 } 651 } 652 cp_len = RTE_MIN(dst_len, src_len); 653 654 rte_memcpy((uint8_t *)memif_get_buffer(proc_private, 655 d0) + dst_off, 656 rte_pktmbuf_mtod_offset(mbuf, void *, src_off), 657 cp_len); 658 659 mq->n_bytes += cp_len; 660 src_off += cp_len; 661 dst_off += cp_len; 662 src_len -= cp_len; 663 dst_len -= cp_len; 664 665 d0->length = dst_off; 666 } 667 668 if (--nb_segs > 0) { 669 mbuf = mbuf->next; 670 goto next_in_chain; 671 } 672 673 n_tx_pkts++; 674 slot++; 675 n_free--; 676 rte_pktmbuf_free(mbuf_head); 677 } 678 679 no_free_slots: 680 if (type == MEMIF_RING_C2S) 681 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE); 682 else 683 __atomic_store_n(&ring->tail, slot, __ATOMIC_RELEASE); 684 685 if (((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) && 686 (rte_intr_fd_get(mq->intr_handle) >= 0)) { 687 a = 1; 688 size = write(rte_intr_fd_get(mq->intr_handle), &a, 689 sizeof(a)); 690 if (unlikely(size < 0)) { 691 MIF_LOG(WARNING, 692 "Failed to send interrupt. %s", strerror(errno)); 693 } 694 } 695 696 mq->n_pkts += n_tx_pkts; 697 return n_tx_pkts; 698 } 699 700 701 static int 702 memif_tx_one_zc(struct pmd_process_private *proc_private, struct memif_queue *mq, 703 memif_ring_t *ring, struct rte_mbuf *mbuf, const uint16_t mask, 704 uint16_t slot, uint16_t n_free) 705 { 706 memif_desc_t *d0; 707 uint16_t nb_segs = mbuf->nb_segs; 708 int used_slots = 1; 709 710 next_in_chain: 711 /* store pointer to mbuf to free it later */ 712 mq->buffers[slot & mask] = mbuf; 713 /* Increment refcnt to make sure the buffer is not freed before server 714 * receives it. (current segment) 715 */ 716 rte_mbuf_refcnt_update(mbuf, 1); 717 /* populate descriptor */ 718 d0 = &ring->desc[slot & mask]; 719 d0->length = rte_pktmbuf_data_len(mbuf); 720 mq->n_bytes += rte_pktmbuf_data_len(mbuf); 721 /* FIXME: get region index */ 722 d0->region = 1; 723 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) - 724 (uint8_t *)proc_private->regions[d0->region]->addr; 725 d0->flags = 0; 726 727 /* check if buffer is chained */ 728 if (--nb_segs > 0) { 729 if (n_free < 2) 730 return 0; 731 /* mark buffer as chained */ 732 d0->flags |= MEMIF_DESC_FLAG_NEXT; 733 /* advance mbuf */ 734 mbuf = mbuf->next; 735 /* update counters */ 736 used_slots++; 737 slot++; 738 n_free--; 739 goto next_in_chain; 740 } 741 return used_slots; 742 } 743 744 static uint16_t 745 eth_memif_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) 746 { 747 struct memif_queue *mq = queue; 748 struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private; 749 struct pmd_process_private *proc_private = 750 rte_eth_devices[mq->in_port].process_private; 751 memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq); 752 uint16_t slot, n_free, ring_size, mask, n_tx_pkts = 0; 753 struct rte_eth_link link; 754 755 if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0)) 756 return 0; 757 if (unlikely(ring == NULL)) { 758 /* Secondary process will attempt to request regions. */ 759 rte_eth_link_get(mq->in_port, &link); 760 return 0; 761 } 762 763 ring_size = 1 << mq->log2_ring_size; 764 mask = ring_size - 1; 765 766 /* free mbufs received by server */ 767 memif_free_stored_mbufs(proc_private, mq); 768 769 /* ring type always MEMIF_RING_C2S */ 770 /* For C2S queues ring->head is updated by the sender and 771 * this function is called in the context of sending thread. 772 * The loads in the sender do not need to synchronize with 773 * its own stores. Hence, the following load can be a 774 * relaxed load. 775 */ 776 slot = __atomic_load_n(&ring->head, __ATOMIC_RELAXED); 777 n_free = ring_size - slot + mq->last_tail; 778 779 int used_slots; 780 781 while (n_free && (n_tx_pkts < nb_pkts)) { 782 while ((n_free > 4) && ((nb_pkts - n_tx_pkts) > 4)) { 783 if ((nb_pkts - n_tx_pkts) > 8) { 784 rte_prefetch0(*bufs + 4); 785 rte_prefetch0(*bufs + 5); 786 rte_prefetch0(*bufs + 6); 787 rte_prefetch0(*bufs + 7); 788 } 789 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 790 mask, slot, n_free); 791 if (unlikely(used_slots < 1)) 792 goto no_free_slots; 793 n_tx_pkts++; 794 slot += used_slots; 795 n_free -= used_slots; 796 797 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 798 mask, slot, n_free); 799 if (unlikely(used_slots < 1)) 800 goto no_free_slots; 801 n_tx_pkts++; 802 slot += used_slots; 803 n_free -= used_slots; 804 805 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 806 mask, slot, n_free); 807 if (unlikely(used_slots < 1)) 808 goto no_free_slots; 809 n_tx_pkts++; 810 slot += used_slots; 811 n_free -= used_slots; 812 813 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 814 mask, slot, n_free); 815 if (unlikely(used_slots < 1)) 816 goto no_free_slots; 817 n_tx_pkts++; 818 slot += used_slots; 819 n_free -= used_slots; 820 } 821 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++, 822 mask, slot, n_free); 823 if (unlikely(used_slots < 1)) 824 goto no_free_slots; 825 n_tx_pkts++; 826 slot += used_slots; 827 n_free -= used_slots; 828 } 829 830 no_free_slots: 831 /* ring type always MEMIF_RING_C2S */ 832 /* The ring->head acts as a guard variable between Tx and Rx 833 * threads, so using store-release pairs with load-acquire 834 * in function eth_memif_rx for C2S rings. 835 */ 836 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE); 837 838 /* Send interrupt, if enabled. */ 839 if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) { 840 uint64_t a = 1; 841 if (rte_intr_fd_get(mq->intr_handle) < 0) 842 return -1; 843 844 ssize_t size = write(rte_intr_fd_get(mq->intr_handle), 845 &a, sizeof(a)); 846 if (unlikely(size < 0)) { 847 MIF_LOG(WARNING, 848 "Failed to send interrupt. %s", strerror(errno)); 849 } 850 } 851 852 /* increment queue counters */ 853 mq->n_pkts += n_tx_pkts; 854 855 return n_tx_pkts; 856 } 857 858 void 859 memif_free_regions(struct rte_eth_dev *dev) 860 { 861 struct pmd_process_private *proc_private = dev->process_private; 862 struct pmd_internals *pmd = dev->data->dev_private; 863 int i; 864 struct memif_region *r; 865 866 /* regions are allocated contiguously, so it's 867 * enough to loop until 'proc_private->regions_num' 868 */ 869 for (i = 0; i < proc_private->regions_num; i++) { 870 r = proc_private->regions[i]; 871 if (r != NULL) { 872 /* This is memzone */ 873 if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) { 874 r->addr = NULL; 875 if (r->fd > 0) 876 close(r->fd); 877 } 878 if (r->addr != NULL) { 879 munmap(r->addr, r->region_size); 880 if (r->fd > 0) { 881 close(r->fd); 882 r->fd = -1; 883 } 884 } 885 rte_free(r); 886 proc_private->regions[i] = NULL; 887 } 888 } 889 proc_private->regions_num = 0; 890 } 891 892 static int 893 memif_region_init_zc(const struct rte_memseg_list *msl, const struct rte_memseg *ms, 894 void *arg) 895 { 896 struct pmd_process_private *proc_private = (struct pmd_process_private *)arg; 897 struct memif_region *r; 898 899 if (proc_private->regions_num < 1) { 900 MIF_LOG(ERR, "Missing descriptor region"); 901 return -1; 902 } 903 904 r = proc_private->regions[proc_private->regions_num - 1]; 905 906 if (r->addr != msl->base_va) 907 r = proc_private->regions[++proc_private->regions_num - 1]; 908 909 if (r == NULL) { 910 r = rte_zmalloc("region", sizeof(struct memif_region), 0); 911 if (r == NULL) { 912 MIF_LOG(ERR, "Failed to alloc memif region."); 913 return -ENOMEM; 914 } 915 916 r->addr = msl->base_va; 917 r->region_size = ms->len; 918 r->fd = rte_memseg_get_fd(ms); 919 if (r->fd < 0) 920 return -1; 921 r->pkt_buffer_offset = 0; 922 923 proc_private->regions[proc_private->regions_num - 1] = r; 924 } else { 925 r->region_size += ms->len; 926 } 927 928 return 0; 929 } 930 931 static int 932 memif_region_init_shm(struct rte_eth_dev *dev, uint8_t has_buffers) 933 { 934 struct pmd_internals *pmd = dev->data->dev_private; 935 struct pmd_process_private *proc_private = dev->process_private; 936 char shm_name[ETH_MEMIF_SHM_NAME_SIZE]; 937 int ret = 0; 938 struct memif_region *r; 939 940 if (proc_private->regions_num >= ETH_MEMIF_MAX_REGION_NUM) { 941 MIF_LOG(ERR, "Too many regions."); 942 return -1; 943 } 944 945 r = rte_zmalloc("region", sizeof(struct memif_region), 0); 946 if (r == NULL) { 947 MIF_LOG(ERR, "Failed to alloc memif region."); 948 return -ENOMEM; 949 } 950 951 /* calculate buffer offset */ 952 r->pkt_buffer_offset = (pmd->run.num_c2s_rings + pmd->run.num_s2c_rings) * 953 (sizeof(memif_ring_t) + sizeof(memif_desc_t) * 954 (1 << pmd->run.log2_ring_size)); 955 956 r->region_size = r->pkt_buffer_offset; 957 /* if region has buffers, add buffers size to region_size */ 958 if (has_buffers == 1) 959 r->region_size += (uint32_t)(pmd->run.pkt_buffer_size * 960 (1 << pmd->run.log2_ring_size) * 961 (pmd->run.num_c2s_rings + 962 pmd->run.num_s2c_rings)); 963 964 memset(shm_name, 0, sizeof(char) * ETH_MEMIF_SHM_NAME_SIZE); 965 snprintf(shm_name, ETH_MEMIF_SHM_NAME_SIZE, "memif_region_%d", 966 proc_private->regions_num); 967 968 r->fd = memfd_create(shm_name, MFD_ALLOW_SEALING); 969 if (r->fd < 0) { 970 MIF_LOG(ERR, "Failed to create shm file: %s.", strerror(errno)); 971 ret = -1; 972 goto error; 973 } 974 975 ret = fcntl(r->fd, F_ADD_SEALS, F_SEAL_SHRINK); 976 if (ret < 0) { 977 MIF_LOG(ERR, "Failed to add seals to shm file: %s.", strerror(errno)); 978 goto error; 979 } 980 981 ret = ftruncate(r->fd, r->region_size); 982 if (ret < 0) { 983 MIF_LOG(ERR, "Failed to truncate shm file: %s.", strerror(errno)); 984 goto error; 985 } 986 987 r->addr = mmap(NULL, r->region_size, PROT_READ | 988 PROT_WRITE, MAP_SHARED, r->fd, 0); 989 if (r->addr == MAP_FAILED) { 990 MIF_LOG(ERR, "Failed to mmap shm region: %s.", strerror(ret)); 991 ret = -1; 992 goto error; 993 } 994 995 proc_private->regions[proc_private->regions_num] = r; 996 proc_private->regions_num++; 997 998 return ret; 999 1000 error: 1001 if (r->fd > 0) 1002 close(r->fd); 1003 r->fd = -1; 1004 1005 return ret; 1006 } 1007 1008 static int 1009 memif_regions_init(struct rte_eth_dev *dev) 1010 { 1011 struct pmd_internals *pmd = dev->data->dev_private; 1012 int ret; 1013 1014 /* 1015 * Zero-copy exposes dpdk memory. 1016 * Each memseg list will be represented by memif region. 1017 * Zero-copy regions indexing: memseg list idx + 1, 1018 * as we already have region 0 reserved for descriptors. 1019 */ 1020 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 1021 /* create region idx 0 containing descriptors */ 1022 ret = memif_region_init_shm(dev, 0); 1023 if (ret < 0) 1024 return ret; 1025 ret = rte_memseg_walk(memif_region_init_zc, (void *)dev->process_private); 1026 if (ret < 0) 1027 return ret; 1028 } else { 1029 /* create one memory region contaning rings and buffers */ 1030 ret = memif_region_init_shm(dev, /* has buffers */ 1); 1031 if (ret < 0) 1032 return ret; 1033 } 1034 1035 return 0; 1036 } 1037 1038 static void 1039 memif_init_rings(struct rte_eth_dev *dev) 1040 { 1041 struct pmd_internals *pmd = dev->data->dev_private; 1042 struct pmd_process_private *proc_private = dev->process_private; 1043 memif_ring_t *ring; 1044 int i, j; 1045 uint16_t slot; 1046 1047 for (i = 0; i < pmd->run.num_c2s_rings; i++) { 1048 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_C2S, i); 1049 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED); 1050 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED); 1051 ring->cookie = MEMIF_COOKIE; 1052 ring->flags = 0; 1053 1054 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) 1055 continue; 1056 1057 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) { 1058 slot = i * (1 << pmd->run.log2_ring_size) + j; 1059 ring->desc[j].region = 0; 1060 ring->desc[j].offset = 1061 proc_private->regions[0]->pkt_buffer_offset + 1062 (uint32_t)(slot * pmd->run.pkt_buffer_size); 1063 ring->desc[j].length = pmd->run.pkt_buffer_size; 1064 } 1065 } 1066 1067 for (i = 0; i < pmd->run.num_s2c_rings; i++) { 1068 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_S2C, i); 1069 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED); 1070 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED); 1071 ring->cookie = MEMIF_COOKIE; 1072 ring->flags = 0; 1073 1074 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) 1075 continue; 1076 1077 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) { 1078 slot = (i + pmd->run.num_c2s_rings) * 1079 (1 << pmd->run.log2_ring_size) + j; 1080 ring->desc[j].region = 0; 1081 ring->desc[j].offset = 1082 proc_private->regions[0]->pkt_buffer_offset + 1083 (uint32_t)(slot * pmd->run.pkt_buffer_size); 1084 ring->desc[j].length = pmd->run.pkt_buffer_size; 1085 } 1086 } 1087 } 1088 1089 /* called only by client */ 1090 static int 1091 memif_init_queues(struct rte_eth_dev *dev) 1092 { 1093 struct pmd_internals *pmd = dev->data->dev_private; 1094 struct memif_queue *mq; 1095 int i; 1096 1097 for (i = 0; i < pmd->run.num_c2s_rings; i++) { 1098 mq = dev->data->tx_queues[i]; 1099 mq->log2_ring_size = pmd->run.log2_ring_size; 1100 /* queues located only in region 0 */ 1101 mq->region = 0; 1102 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_C2S, i); 1103 mq->last_head = 0; 1104 mq->last_tail = 0; 1105 if (rte_intr_fd_set(mq->intr_handle, eventfd(0, EFD_NONBLOCK))) 1106 return -rte_errno; 1107 1108 if (rte_intr_fd_get(mq->intr_handle) < 0) { 1109 MIF_LOG(WARNING, 1110 "Failed to create eventfd for tx queue %d: %s.", i, 1111 strerror(errno)); 1112 } 1113 mq->buffers = NULL; 1114 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 1115 mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) * 1116 (1 << mq->log2_ring_size), 0); 1117 if (mq->buffers == NULL) 1118 return -ENOMEM; 1119 } 1120 } 1121 1122 for (i = 0; i < pmd->run.num_s2c_rings; i++) { 1123 mq = dev->data->rx_queues[i]; 1124 mq->log2_ring_size = pmd->run.log2_ring_size; 1125 /* queues located only in region 0 */ 1126 mq->region = 0; 1127 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_S2C, i); 1128 mq->last_head = 0; 1129 mq->last_tail = 0; 1130 if (rte_intr_fd_set(mq->intr_handle, eventfd(0, EFD_NONBLOCK))) 1131 return -rte_errno; 1132 if (rte_intr_fd_get(mq->intr_handle) < 0) { 1133 MIF_LOG(WARNING, 1134 "Failed to create eventfd for rx queue %d: %s.", i, 1135 strerror(errno)); 1136 } 1137 mq->buffers = NULL; 1138 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 1139 mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) * 1140 (1 << mq->log2_ring_size), 0); 1141 if (mq->buffers == NULL) 1142 return -ENOMEM; 1143 } 1144 } 1145 return 0; 1146 } 1147 1148 int 1149 memif_init_regions_and_queues(struct rte_eth_dev *dev) 1150 { 1151 int ret; 1152 1153 ret = memif_regions_init(dev); 1154 if (ret < 0) 1155 return ret; 1156 1157 memif_init_rings(dev); 1158 1159 ret = memif_init_queues(dev); 1160 if (ret < 0) 1161 return ret; 1162 1163 return 0; 1164 } 1165 1166 int 1167 memif_connect(struct rte_eth_dev *dev) 1168 { 1169 struct pmd_internals *pmd = dev->data->dev_private; 1170 struct pmd_process_private *proc_private = dev->process_private; 1171 struct memif_region *mr; 1172 struct memif_queue *mq; 1173 memif_ring_t *ring; 1174 int i; 1175 1176 for (i = 0; i < proc_private->regions_num; i++) { 1177 mr = proc_private->regions[i]; 1178 if (mr != NULL) { 1179 if (mr->addr == NULL) { 1180 if (mr->fd < 0) 1181 return -1; 1182 mr->addr = mmap(NULL, mr->region_size, 1183 PROT_READ | PROT_WRITE, 1184 MAP_SHARED, mr->fd, 0); 1185 if (mr->addr == MAP_FAILED) { 1186 MIF_LOG(ERR, "mmap failed: %s\n", 1187 strerror(errno)); 1188 return -1; 1189 } 1190 } 1191 if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) { 1192 /* close memseg file */ 1193 close(mr->fd); 1194 mr->fd = -1; 1195 } 1196 } 1197 } 1198 1199 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 1200 for (i = 0; i < pmd->run.num_c2s_rings; i++) { 1201 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? 1202 dev->data->tx_queues[i] : dev->data->rx_queues[i]; 1203 ring = memif_get_ring_from_queue(proc_private, mq); 1204 if (ring == NULL || ring->cookie != MEMIF_COOKIE) { 1205 MIF_LOG(ERR, "Wrong ring"); 1206 return -1; 1207 } 1208 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED); 1209 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED); 1210 mq->last_head = 0; 1211 mq->last_tail = 0; 1212 /* enable polling mode */ 1213 if (pmd->role == MEMIF_ROLE_SERVER) 1214 ring->flags = MEMIF_RING_FLAG_MASK_INT; 1215 } 1216 for (i = 0; i < pmd->run.num_s2c_rings; i++) { 1217 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? 1218 dev->data->rx_queues[i] : dev->data->tx_queues[i]; 1219 ring = memif_get_ring_from_queue(proc_private, mq); 1220 if (ring == NULL || ring->cookie != MEMIF_COOKIE) { 1221 MIF_LOG(ERR, "Wrong ring"); 1222 return -1; 1223 } 1224 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED); 1225 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED); 1226 mq->last_head = 0; 1227 mq->last_tail = 0; 1228 /* enable polling mode */ 1229 if (pmd->role == MEMIF_ROLE_CLIENT) 1230 ring->flags = MEMIF_RING_FLAG_MASK_INT; 1231 } 1232 1233 pmd->flags &= ~ETH_MEMIF_FLAG_CONNECTING; 1234 pmd->flags |= ETH_MEMIF_FLAG_CONNECTED; 1235 dev->data->dev_link.link_status = RTE_ETH_LINK_UP; 1236 } 1237 MIF_LOG(INFO, "Connected."); 1238 return 0; 1239 } 1240 1241 static int 1242 memif_dev_start(struct rte_eth_dev *dev) 1243 { 1244 struct pmd_internals *pmd = dev->data->dev_private; 1245 int ret = 0; 1246 1247 switch (pmd->role) { 1248 case MEMIF_ROLE_CLIENT: 1249 ret = memif_connect_client(dev); 1250 break; 1251 case MEMIF_ROLE_SERVER: 1252 ret = memif_connect_server(dev); 1253 break; 1254 default: 1255 MIF_LOG(ERR, "Unknown role: %d.", pmd->role); 1256 ret = -1; 1257 break; 1258 } 1259 1260 return ret; 1261 } 1262 1263 static int 1264 memif_dev_close(struct rte_eth_dev *dev) 1265 { 1266 struct pmd_internals *pmd = dev->data->dev_private; 1267 int i; 1268 1269 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 1270 memif_msg_enq_disconnect(pmd->cc, "Device closed", 0); 1271 memif_disconnect(dev); 1272 1273 for (i = 0; i < dev->data->nb_rx_queues; i++) 1274 (*dev->dev_ops->rx_queue_release)(dev, i); 1275 for (i = 0; i < dev->data->nb_tx_queues; i++) 1276 (*dev->dev_ops->tx_queue_release)(dev, i); 1277 1278 memif_socket_remove_device(dev); 1279 } else { 1280 memif_disconnect(dev); 1281 } 1282 1283 rte_free(dev->process_private); 1284 1285 return 0; 1286 } 1287 1288 static int 1289 memif_dev_configure(struct rte_eth_dev *dev) 1290 { 1291 struct pmd_internals *pmd = dev->data->dev_private; 1292 1293 /* 1294 * CLIENT - TXQ 1295 * SERVER - RXQ 1296 */ 1297 pmd->cfg.num_c2s_rings = (pmd->role == MEMIF_ROLE_CLIENT) ? 1298 dev->data->nb_tx_queues : dev->data->nb_rx_queues; 1299 1300 /* 1301 * CLIENT - RXQ 1302 * SERVER - TXQ 1303 */ 1304 pmd->cfg.num_s2c_rings = (pmd->role == MEMIF_ROLE_CLIENT) ? 1305 dev->data->nb_rx_queues : dev->data->nb_tx_queues; 1306 1307 return 0; 1308 } 1309 1310 static int 1311 memif_tx_queue_setup(struct rte_eth_dev *dev, 1312 uint16_t qid, 1313 uint16_t nb_tx_desc __rte_unused, 1314 unsigned int socket_id __rte_unused, 1315 const struct rte_eth_txconf *tx_conf __rte_unused) 1316 { 1317 struct pmd_internals *pmd = dev->data->dev_private; 1318 struct memif_queue *mq; 1319 1320 mq = rte_zmalloc("tx-queue", sizeof(struct memif_queue), 0); 1321 if (mq == NULL) { 1322 MIF_LOG(ERR, "Failed to allocate tx queue id: %u", qid); 1323 return -ENOMEM; 1324 } 1325 1326 /* Allocate interrupt instance */ 1327 mq->intr_handle = rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED); 1328 if (mq->intr_handle == NULL) { 1329 MIF_LOG(ERR, "Failed to allocate intr handle"); 1330 return -ENOMEM; 1331 } 1332 1333 mq->type = 1334 (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_C2S : MEMIF_RING_S2C; 1335 mq->n_pkts = 0; 1336 mq->n_bytes = 0; 1337 1338 if (rte_intr_fd_set(mq->intr_handle, -1)) 1339 return -rte_errno; 1340 1341 if (rte_intr_type_set(mq->intr_handle, RTE_INTR_HANDLE_EXT)) 1342 return -rte_errno; 1343 1344 mq->in_port = dev->data->port_id; 1345 dev->data->tx_queues[qid] = mq; 1346 1347 return 0; 1348 } 1349 1350 static int 1351 memif_rx_queue_setup(struct rte_eth_dev *dev, 1352 uint16_t qid, 1353 uint16_t nb_rx_desc __rte_unused, 1354 unsigned int socket_id __rte_unused, 1355 const struct rte_eth_rxconf *rx_conf __rte_unused, 1356 struct rte_mempool *mb_pool) 1357 { 1358 struct pmd_internals *pmd = dev->data->dev_private; 1359 struct memif_queue *mq; 1360 1361 mq = rte_zmalloc("rx-queue", sizeof(struct memif_queue), 0); 1362 if (mq == NULL) { 1363 MIF_LOG(ERR, "Failed to allocate rx queue id: %u", qid); 1364 return -ENOMEM; 1365 } 1366 1367 /* Allocate interrupt instance */ 1368 mq->intr_handle = rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED); 1369 if (mq->intr_handle == NULL) { 1370 MIF_LOG(ERR, "Failed to allocate intr handle"); 1371 return -ENOMEM; 1372 } 1373 1374 mq->type = (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_S2C : MEMIF_RING_C2S; 1375 mq->n_pkts = 0; 1376 mq->n_bytes = 0; 1377 1378 if (rte_intr_fd_set(mq->intr_handle, -1)) 1379 return -rte_errno; 1380 1381 if (rte_intr_type_set(mq->intr_handle, RTE_INTR_HANDLE_EXT)) 1382 return -rte_errno; 1383 1384 mq->mempool = mb_pool; 1385 mq->in_port = dev->data->port_id; 1386 dev->data->rx_queues[qid] = mq; 1387 1388 return 0; 1389 } 1390 1391 static void 1392 memif_rx_queue_release(struct rte_eth_dev *dev, uint16_t qid) 1393 { 1394 struct memif_queue *mq = dev->data->rx_queues[qid]; 1395 1396 if (!mq) 1397 return; 1398 1399 rte_intr_instance_free(mq->intr_handle); 1400 rte_free(mq); 1401 } 1402 1403 static void 1404 memif_tx_queue_release(struct rte_eth_dev *dev, uint16_t qid) 1405 { 1406 struct memif_queue *mq = dev->data->tx_queues[qid]; 1407 1408 if (!mq) 1409 return; 1410 1411 rte_free(mq); 1412 } 1413 1414 static int 1415 memif_link_update(struct rte_eth_dev *dev, 1416 int wait_to_complete __rte_unused) 1417 { 1418 struct pmd_process_private *proc_private; 1419 1420 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1421 proc_private = dev->process_private; 1422 if (dev->data->dev_link.link_status == RTE_ETH_LINK_UP && 1423 proc_private->regions_num == 0) { 1424 memif_mp_request_regions(dev); 1425 } else if (dev->data->dev_link.link_status == RTE_ETH_LINK_DOWN && 1426 proc_private->regions_num > 0) { 1427 memif_free_regions(dev); 1428 } 1429 } 1430 return 0; 1431 } 1432 1433 static int 1434 memif_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) 1435 { 1436 struct pmd_internals *pmd = dev->data->dev_private; 1437 struct memif_queue *mq; 1438 int i; 1439 uint8_t tmp, nq; 1440 1441 stats->ipackets = 0; 1442 stats->ibytes = 0; 1443 stats->opackets = 0; 1444 stats->obytes = 0; 1445 1446 tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_c2s_rings : 1447 pmd->run.num_s2c_rings; 1448 nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp : 1449 RTE_ETHDEV_QUEUE_STAT_CNTRS; 1450 1451 /* RX stats */ 1452 for (i = 0; i < nq; i++) { 1453 mq = dev->data->rx_queues[i]; 1454 stats->q_ipackets[i] = mq->n_pkts; 1455 stats->q_ibytes[i] = mq->n_bytes; 1456 stats->ipackets += mq->n_pkts; 1457 stats->ibytes += mq->n_bytes; 1458 } 1459 1460 tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_s2c_rings : 1461 pmd->run.num_c2s_rings; 1462 nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp : 1463 RTE_ETHDEV_QUEUE_STAT_CNTRS; 1464 1465 /* TX stats */ 1466 for (i = 0; i < nq; i++) { 1467 mq = dev->data->tx_queues[i]; 1468 stats->q_opackets[i] = mq->n_pkts; 1469 stats->q_obytes[i] = mq->n_bytes; 1470 stats->opackets += mq->n_pkts; 1471 stats->obytes += mq->n_bytes; 1472 } 1473 return 0; 1474 } 1475 1476 static int 1477 memif_stats_reset(struct rte_eth_dev *dev) 1478 { 1479 struct pmd_internals *pmd = dev->data->dev_private; 1480 int i; 1481 struct memif_queue *mq; 1482 1483 for (i = 0; i < pmd->run.num_c2s_rings; i++) { 1484 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->tx_queues[i] : 1485 dev->data->rx_queues[i]; 1486 mq->n_pkts = 0; 1487 mq->n_bytes = 0; 1488 } 1489 for (i = 0; i < pmd->run.num_s2c_rings; i++) { 1490 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->rx_queues[i] : 1491 dev->data->tx_queues[i]; 1492 mq->n_pkts = 0; 1493 mq->n_bytes = 0; 1494 } 1495 1496 return 0; 1497 } 1498 1499 static int 1500 memif_rx_queue_intr_enable(struct rte_eth_dev *dev __rte_unused, 1501 uint16_t qid __rte_unused) 1502 { 1503 MIF_LOG(WARNING, "Interrupt mode not supported."); 1504 1505 return -1; 1506 } 1507 1508 static int 1509 memif_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t qid __rte_unused) 1510 { 1511 struct pmd_internals *pmd __rte_unused = dev->data->dev_private; 1512 1513 return 0; 1514 } 1515 1516 static const struct eth_dev_ops ops = { 1517 .dev_start = memif_dev_start, 1518 .dev_close = memif_dev_close, 1519 .dev_infos_get = memif_dev_info, 1520 .dev_configure = memif_dev_configure, 1521 .tx_queue_setup = memif_tx_queue_setup, 1522 .rx_queue_setup = memif_rx_queue_setup, 1523 .rx_queue_release = memif_rx_queue_release, 1524 .tx_queue_release = memif_tx_queue_release, 1525 .rx_queue_intr_enable = memif_rx_queue_intr_enable, 1526 .rx_queue_intr_disable = memif_rx_queue_intr_disable, 1527 .link_update = memif_link_update, 1528 .stats_get = memif_stats_get, 1529 .stats_reset = memif_stats_reset, 1530 }; 1531 1532 static int 1533 memif_create(struct rte_vdev_device *vdev, enum memif_role_t role, 1534 memif_interface_id_t id, uint32_t flags, 1535 const char *socket_filename, 1536 memif_log2_ring_size_t log2_ring_size, 1537 uint16_t pkt_buffer_size, const char *secret, 1538 struct rte_ether_addr *ether_addr) 1539 { 1540 int ret = 0; 1541 struct rte_eth_dev *eth_dev; 1542 struct rte_eth_dev_data *data; 1543 struct pmd_internals *pmd; 1544 struct pmd_process_private *process_private; 1545 const unsigned int numa_node = vdev->device.numa_node; 1546 const char *name = rte_vdev_device_name(vdev); 1547 1548 eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd)); 1549 if (eth_dev == NULL) { 1550 MIF_LOG(ERR, "%s: Unable to allocate device struct.", name); 1551 return -1; 1552 } 1553 1554 process_private = (struct pmd_process_private *) 1555 rte_zmalloc(name, sizeof(struct pmd_process_private), 1556 RTE_CACHE_LINE_SIZE); 1557 1558 if (process_private == NULL) { 1559 MIF_LOG(ERR, "Failed to alloc memory for process private"); 1560 return -1; 1561 } 1562 eth_dev->process_private = process_private; 1563 1564 pmd = eth_dev->data->dev_private; 1565 memset(pmd, 0, sizeof(*pmd)); 1566 1567 pmd->id = id; 1568 pmd->flags = flags; 1569 pmd->flags |= ETH_MEMIF_FLAG_DISABLED; 1570 pmd->role = role; 1571 /* Zero-copy flag irelevant to server. */ 1572 if (pmd->role == MEMIF_ROLE_SERVER) 1573 pmd->flags &= ~ETH_MEMIF_FLAG_ZERO_COPY; 1574 1575 ret = memif_socket_init(eth_dev, socket_filename); 1576 if (ret < 0) 1577 return ret; 1578 1579 memset(pmd->secret, 0, sizeof(char) * ETH_MEMIF_SECRET_SIZE); 1580 if (secret != NULL) 1581 strlcpy(pmd->secret, secret, sizeof(pmd->secret)); 1582 1583 pmd->cfg.log2_ring_size = log2_ring_size; 1584 /* set in .dev_configure() */ 1585 pmd->cfg.num_c2s_rings = 0; 1586 pmd->cfg.num_s2c_rings = 0; 1587 1588 pmd->cfg.pkt_buffer_size = pkt_buffer_size; 1589 rte_spinlock_init(&pmd->cc_lock); 1590 1591 data = eth_dev->data; 1592 data->dev_private = pmd; 1593 data->numa_node = numa_node; 1594 data->dev_link = pmd_link; 1595 data->mac_addrs = ether_addr; 1596 data->promiscuous = 1; 1597 data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS; 1598 1599 eth_dev->dev_ops = &ops; 1600 eth_dev->device = &vdev->device; 1601 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) { 1602 eth_dev->rx_pkt_burst = eth_memif_rx_zc; 1603 eth_dev->tx_pkt_burst = eth_memif_tx_zc; 1604 } else { 1605 eth_dev->rx_pkt_burst = eth_memif_rx; 1606 eth_dev->tx_pkt_burst = eth_memif_tx; 1607 } 1608 1609 rte_eth_dev_probing_finish(eth_dev); 1610 1611 return 0; 1612 } 1613 1614 static int 1615 memif_set_role(const char *key __rte_unused, const char *value, 1616 void *extra_args) 1617 { 1618 enum memif_role_t *role = (enum memif_role_t *)extra_args; 1619 1620 if (strstr(value, "server") != NULL) { 1621 *role = MEMIF_ROLE_SERVER; 1622 } else if (strstr(value, "client") != NULL) { 1623 *role = MEMIF_ROLE_CLIENT; 1624 } else if (strstr(value, "master") != NULL) { 1625 MIF_LOG(NOTICE, "Role argument \"master\" is deprecated, use \"server\""); 1626 *role = MEMIF_ROLE_SERVER; 1627 } else if (strstr(value, "slave") != NULL) { 1628 MIF_LOG(NOTICE, "Role argument \"slave\" is deprecated, use \"client\""); 1629 *role = MEMIF_ROLE_CLIENT; 1630 } else { 1631 MIF_LOG(ERR, "Unknown role: %s.", value); 1632 return -EINVAL; 1633 } 1634 return 0; 1635 } 1636 1637 static int 1638 memif_set_zc(const char *key __rte_unused, const char *value, void *extra_args) 1639 { 1640 uint32_t *flags = (uint32_t *)extra_args; 1641 1642 if (strstr(value, "yes") != NULL) { 1643 if (!rte_mcfg_get_single_file_segments()) { 1644 MIF_LOG(ERR, "Zero-copy doesn't support multi-file segments."); 1645 return -ENOTSUP; 1646 } 1647 *flags |= ETH_MEMIF_FLAG_ZERO_COPY; 1648 } else if (strstr(value, "no") != NULL) { 1649 *flags &= ~ETH_MEMIF_FLAG_ZERO_COPY; 1650 } else { 1651 MIF_LOG(ERR, "Failed to parse zero-copy param: %s.", value); 1652 return -EINVAL; 1653 } 1654 return 0; 1655 } 1656 1657 static int 1658 memif_set_id(const char *key __rte_unused, const char *value, void *extra_args) 1659 { 1660 memif_interface_id_t *id = (memif_interface_id_t *)extra_args; 1661 1662 /* even if parsing fails, 0 is a valid id */ 1663 *id = strtoul(value, NULL, 10); 1664 return 0; 1665 } 1666 1667 static int 1668 memif_set_bs(const char *key __rte_unused, const char *value, void *extra_args) 1669 { 1670 unsigned long tmp; 1671 uint16_t *pkt_buffer_size = (uint16_t *)extra_args; 1672 1673 tmp = strtoul(value, NULL, 10); 1674 if (tmp == 0 || tmp > 0xFFFF) { 1675 MIF_LOG(ERR, "Invalid buffer size: %s.", value); 1676 return -EINVAL; 1677 } 1678 *pkt_buffer_size = tmp; 1679 return 0; 1680 } 1681 1682 static int 1683 memif_set_rs(const char *key __rte_unused, const char *value, void *extra_args) 1684 { 1685 unsigned long tmp; 1686 memif_log2_ring_size_t *log2_ring_size = 1687 (memif_log2_ring_size_t *)extra_args; 1688 1689 tmp = strtoul(value, NULL, 10); 1690 if (tmp == 0 || tmp > ETH_MEMIF_MAX_LOG2_RING_SIZE) { 1691 MIF_LOG(ERR, "Invalid ring size: %s (max %u).", 1692 value, ETH_MEMIF_MAX_LOG2_RING_SIZE); 1693 return -EINVAL; 1694 } 1695 *log2_ring_size = tmp; 1696 return 0; 1697 } 1698 1699 /* check if directory exists and if we have permission to read/write */ 1700 static int 1701 memif_check_socket_filename(const char *filename) 1702 { 1703 char *dir = NULL, *tmp; 1704 uint32_t idx; 1705 int ret = 0; 1706 1707 if (strlen(filename) >= MEMIF_SOCKET_UN_SIZE) { 1708 MIF_LOG(ERR, "Unix socket address too long (max 108)."); 1709 return -1; 1710 } 1711 1712 tmp = strrchr(filename, '/'); 1713 if (tmp != NULL) { 1714 idx = tmp - filename; 1715 dir = rte_zmalloc("memif_tmp", sizeof(char) * (idx + 1), 0); 1716 if (dir == NULL) { 1717 MIF_LOG(ERR, "Failed to allocate memory."); 1718 return -1; 1719 } 1720 strlcpy(dir, filename, sizeof(char) * (idx + 1)); 1721 } 1722 1723 if (dir == NULL || (faccessat(-1, dir, F_OK | R_OK | 1724 W_OK, AT_EACCESS) < 0)) { 1725 MIF_LOG(ERR, "Invalid socket directory."); 1726 ret = -EINVAL; 1727 } 1728 1729 if (dir != NULL) 1730 rte_free(dir); 1731 1732 return ret; 1733 } 1734 1735 static int 1736 memif_set_socket_filename(const char *key __rte_unused, const char *value, 1737 void *extra_args) 1738 { 1739 const char **socket_filename = (const char **)extra_args; 1740 1741 *socket_filename = value; 1742 return 0; 1743 } 1744 1745 static int 1746 memif_set_is_socket_abstract(const char *key __rte_unused, const char *value, void *extra_args) 1747 { 1748 uint32_t *flags = (uint32_t *)extra_args; 1749 1750 if (strstr(value, "yes") != NULL) { 1751 *flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT; 1752 } else if (strstr(value, "no") != NULL) { 1753 *flags &= ~ETH_MEMIF_FLAG_SOCKET_ABSTRACT; 1754 } else { 1755 MIF_LOG(ERR, "Failed to parse socket-abstract param: %s.", value); 1756 return -EINVAL; 1757 } 1758 return 0; 1759 } 1760 1761 static int 1762 memif_set_mac(const char *key __rte_unused, const char *value, void *extra_args) 1763 { 1764 struct rte_ether_addr *ether_addr = (struct rte_ether_addr *)extra_args; 1765 1766 if (rte_ether_unformat_addr(value, ether_addr) < 0) 1767 MIF_LOG(WARNING, "Failed to parse mac '%s'.", value); 1768 return 0; 1769 } 1770 1771 static int 1772 memif_set_secret(const char *key __rte_unused, const char *value, void *extra_args) 1773 { 1774 const char **secret = (const char **)extra_args; 1775 1776 *secret = value; 1777 return 0; 1778 } 1779 1780 static int 1781 rte_pmd_memif_probe(struct rte_vdev_device *vdev) 1782 { 1783 RTE_BUILD_BUG_ON(sizeof(memif_msg_t) != 128); 1784 RTE_BUILD_BUG_ON(sizeof(memif_desc_t) != 16); 1785 int ret = 0; 1786 struct rte_kvargs *kvlist; 1787 const char *name = rte_vdev_device_name(vdev); 1788 enum memif_role_t role = MEMIF_ROLE_CLIENT; 1789 memif_interface_id_t id = 0; 1790 uint16_t pkt_buffer_size = ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE; 1791 memif_log2_ring_size_t log2_ring_size = ETH_MEMIF_DEFAULT_RING_SIZE; 1792 const char *socket_filename = ETH_MEMIF_DEFAULT_SOCKET_FILENAME; 1793 uint32_t flags = 0; 1794 const char *secret = NULL; 1795 struct rte_ether_addr *ether_addr = rte_zmalloc("", 1796 sizeof(struct rte_ether_addr), 0); 1797 struct rte_eth_dev *eth_dev; 1798 1799 rte_eth_random_addr(ether_addr->addr_bytes); 1800 1801 MIF_LOG(INFO, "Initialize MEMIF: %s.", name); 1802 1803 if (rte_eal_process_type() == RTE_PROC_SECONDARY) { 1804 eth_dev = rte_eth_dev_attach_secondary(name); 1805 if (!eth_dev) { 1806 MIF_LOG(ERR, "Failed to probe %s", name); 1807 return -1; 1808 } 1809 1810 eth_dev->dev_ops = &ops; 1811 eth_dev->device = &vdev->device; 1812 eth_dev->rx_pkt_burst = eth_memif_rx; 1813 eth_dev->tx_pkt_burst = eth_memif_tx; 1814 1815 if (!rte_eal_primary_proc_alive(NULL)) { 1816 MIF_LOG(ERR, "Primary process is missing"); 1817 return -1; 1818 } 1819 1820 eth_dev->process_private = (struct pmd_process_private *) 1821 rte_zmalloc(name, 1822 sizeof(struct pmd_process_private), 1823 RTE_CACHE_LINE_SIZE); 1824 if (eth_dev->process_private == NULL) { 1825 MIF_LOG(ERR, 1826 "Failed to alloc memory for process private"); 1827 return -1; 1828 } 1829 1830 rte_eth_dev_probing_finish(eth_dev); 1831 1832 return 0; 1833 } 1834 1835 ret = rte_mp_action_register(MEMIF_MP_SEND_REGION, memif_mp_send_region); 1836 /* 1837 * Primary process can continue probing, but secondary process won't 1838 * be able to get memory regions information 1839 */ 1840 if (ret < 0 && rte_errno != EEXIST) 1841 MIF_LOG(WARNING, "Failed to register mp action callback: %s", 1842 strerror(rte_errno)); 1843 1844 /* use abstract address by default */ 1845 flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT; 1846 1847 kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_arguments); 1848 1849 /* parse parameters */ 1850 if (kvlist != NULL) { 1851 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ROLE_ARG, 1852 &memif_set_role, &role); 1853 if (ret < 0) 1854 goto exit; 1855 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ID_ARG, 1856 &memif_set_id, &id); 1857 if (ret < 0) 1858 goto exit; 1859 ret = rte_kvargs_process(kvlist, ETH_MEMIF_PKT_BUFFER_SIZE_ARG, 1860 &memif_set_bs, &pkt_buffer_size); 1861 if (ret < 0) 1862 goto exit; 1863 ret = rte_kvargs_process(kvlist, ETH_MEMIF_RING_SIZE_ARG, 1864 &memif_set_rs, &log2_ring_size); 1865 if (ret < 0) 1866 goto exit; 1867 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ARG, 1868 &memif_set_socket_filename, 1869 (void *)(&socket_filename)); 1870 if (ret < 0) 1871 goto exit; 1872 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ABSTRACT_ARG, 1873 &memif_set_is_socket_abstract, &flags); 1874 if (ret < 0) 1875 goto exit; 1876 ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG, 1877 &memif_set_mac, ether_addr); 1878 if (ret < 0) 1879 goto exit; 1880 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ZC_ARG, 1881 &memif_set_zc, &flags); 1882 if (ret < 0) 1883 goto exit; 1884 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SECRET_ARG, 1885 &memif_set_secret, (void *)(&secret)); 1886 if (ret < 0) 1887 goto exit; 1888 } 1889 1890 if (!(flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT)) { 1891 ret = memif_check_socket_filename(socket_filename); 1892 if (ret < 0) 1893 goto exit; 1894 } 1895 1896 /* create interface */ 1897 ret = memif_create(vdev, role, id, flags, socket_filename, 1898 log2_ring_size, pkt_buffer_size, secret, ether_addr); 1899 1900 exit: 1901 if (kvlist != NULL) 1902 rte_kvargs_free(kvlist); 1903 return ret; 1904 } 1905 1906 static int 1907 rte_pmd_memif_remove(struct rte_vdev_device *vdev) 1908 { 1909 struct rte_eth_dev *eth_dev; 1910 1911 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(vdev)); 1912 if (eth_dev == NULL) 1913 return 0; 1914 1915 return rte_eth_dev_close(eth_dev->data->port_id); 1916 } 1917 1918 static struct rte_vdev_driver pmd_memif_drv = { 1919 .probe = rte_pmd_memif_probe, 1920 .remove = rte_pmd_memif_remove, 1921 }; 1922 1923 RTE_PMD_REGISTER_VDEV(net_memif, pmd_memif_drv); 1924 1925 RTE_PMD_REGISTER_PARAM_STRING(net_memif, 1926 ETH_MEMIF_ID_ARG "=<int>" 1927 ETH_MEMIF_ROLE_ARG "=server|client" 1928 ETH_MEMIF_PKT_BUFFER_SIZE_ARG "=<int>" 1929 ETH_MEMIF_RING_SIZE_ARG "=<int>" 1930 ETH_MEMIF_SOCKET_ARG "=<string>" 1931 ETH_MEMIF_SOCKET_ABSTRACT_ARG "=yes|no" 1932 ETH_MEMIF_MAC_ARG "=xx:xx:xx:xx:xx:xx" 1933 ETH_MEMIF_ZC_ARG "=yes|no" 1934 ETH_MEMIF_SECRET_ARG "=<string>"); 1935 1936 RTE_LOG_REGISTER_DEFAULT(memif_logtype, NOTICE); 1937