drivers/net/memif/rte_eth_memif.c

   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 <rte_ethdev_driver.h>
  21 #include <rte_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_MAC_ARG               "mac"
  40 #define ETH_MEMIF_ZC_ARG                "zero-copy"
  41 #define ETH_MEMIF_SECRET_ARG            "secret"
  42
  43 static const char * const valid_arguments[] = {
  44         ETH_MEMIF_ID_ARG,
  45         ETH_MEMIF_ROLE_ARG,
  46         ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
  47         ETH_MEMIF_RING_SIZE_ARG,
  48         ETH_MEMIF_SOCKET_ARG,
  49         ETH_MEMIF_MAC_ARG,
  50         ETH_MEMIF_ZC_ARG,
  51         ETH_MEMIF_SECRET_ARG,
  52         NULL
  53 };
  54
  55 static const struct rte_eth_link pmd_link = {
  56         .link_speed = ETH_SPEED_NUM_10G,
  57         .link_duplex = ETH_LINK_FULL_DUPLEX,
  58         .link_status = ETH_LINK_DOWN,
  59         .link_autoneg = ETH_LINK_AUTONEG
  60 };
  61
  62 #define MEMIF_MP_SEND_REGION            "memif_mp_send_region"
  63
  64
  65 static int memif_region_init_zc(const struct rte_memseg_list *msl,
  66                                 const struct rte_memseg *ms, void *arg);
  67
  68 const char *
  69 memif_version(void)
  70 {
  71         return ("memif-" RTE_STR(MEMIF_VERSION_MAJOR) "." RTE_STR(MEMIF_VERSION_MINOR));
  72 }
  73
  74 /* Message header to synchronize regions */
  75 struct mp_region_msg {
  76         char port_name[RTE_DEV_NAME_MAX_LEN];
  77         memif_region_index_t idx;
  78         memif_region_size_t size;
  79 };
  80
  81 static int
  82 memif_mp_send_region(const struct rte_mp_msg *msg, const void *peer)
  83 {
  84         struct rte_eth_dev *dev;
  85         struct pmd_process_private *proc_private;
  86         const struct mp_region_msg *msg_param = (const struct mp_region_msg *)msg->param;
  87         struct rte_mp_msg reply;
  88         struct mp_region_msg *reply_param = (struct mp_region_msg *)reply.param;
  89         uint16_t port_id;
  90         int ret;
  91
  92         /* Get requested port */
  93         ret = rte_eth_dev_get_port_by_name(msg_param->port_name, &port_id);
  94         if (ret) {
  95                 MIF_LOG(ERR, "Failed to get port id for %s",
  96                         msg_param->port_name);
  97                 return -1;
  98         }
  99         dev = &rte_eth_devices[port_id];
 100         proc_private = dev->process_private;
 101
 102         memset(&reply, 0, sizeof(reply));
 103         strlcpy(reply.name, msg->name, sizeof(reply.name));
 104         reply_param->idx = msg_param->idx;
 105         if (proc_private->regions[msg_param->idx] != NULL) {
 106                 reply_param->size = proc_private->regions[msg_param->idx]->region_size;
 107                 reply.fds[0] = proc_private->regions[msg_param->idx]->fd;
 108                 reply.num_fds = 1;
 109         }
 110         reply.len_param = sizeof(*reply_param);
 111         if (rte_mp_reply(&reply, peer) < 0) {
 112                 MIF_LOG(ERR, "Failed to reply to an add region request");
 113                 return -1;
 114         }
 115
 116         return 0;
 117 }
 118
 119 /*
 120  * Request regions
 121  * Called by secondary process, when ports link status goes up.
 122  */
 123 static int
 124 memif_mp_request_regions(struct rte_eth_dev *dev)
 125 {
 126         int ret, i;
 127         struct timespec timeout = {.tv_sec = 5, .tv_nsec = 0};
 128         struct rte_mp_msg msg, *reply;
 129         struct rte_mp_reply replies;
 130         struct mp_region_msg *msg_param = (struct mp_region_msg *)msg.param;
 131         struct mp_region_msg *reply_param;
 132         struct memif_region *r;
 133         struct pmd_process_private *proc_private = dev->process_private;
 134         struct pmd_internals *pmd = dev->data->dev_private;
 135         /* in case of zero-copy slave, only request region 0 */
 136         uint16_t max_region_num = (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) ?
 137                                    1 : ETH_MEMIF_MAX_REGION_NUM;
 138
 139         MIF_LOG(DEBUG, "Requesting memory regions");
 140
 141         for (i = 0; i < max_region_num; i++) {
 142                 /* Prepare the message */
 143                 memset(&msg, 0, sizeof(msg));
 144                 strlcpy(msg.name, MEMIF_MP_SEND_REGION, sizeof(msg.name));
 145                 strlcpy(msg_param->port_name, dev->data->name,
 146                         sizeof(msg_param->port_name));
 147                 msg_param->idx = i;
 148                 msg.len_param = sizeof(*msg_param);
 149
 150                 /* Send message */
 151                 ret = rte_mp_request_sync(&msg, &replies, &timeout);
 152                 if (ret < 0 || replies.nb_received != 1) {
 153                         MIF_LOG(ERR, "Failed to send mp msg: %d",
 154                                 rte_errno);
 155                         return -1;
 156                 }
 157
 158                 reply = &replies.msgs[0];
 159                 reply_param = (struct mp_region_msg *)reply->param;
 160
 161                 if (reply_param->size > 0) {
 162                         r = rte_zmalloc("region", sizeof(struct memif_region), 0);
 163                         if (r == NULL) {
 164                                 MIF_LOG(ERR, "Failed to alloc memif region.");
 165                                 free(reply);
 166                                 return -ENOMEM;
 167                         }
 168                         r->region_size = reply_param->size;
 169                         if (reply->num_fds < 1) {
 170                                 MIF_LOG(ERR, "Missing file descriptor.");
 171                                 free(reply);
 172                                 return -1;
 173                         }
 174                         r->fd = reply->fds[0];
 175                         r->addr = NULL;
 176
 177                         proc_private->regions[reply_param->idx] = r;
 178                         proc_private->regions_num++;
 179                 }
 180                 free(reply);
 181         }
 182
 183         if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
 184                 ret = rte_memseg_walk(memif_region_init_zc, (void *)proc_private);
 185                 if (ret < 0)
 186                         return ret;
 187         }
 188
 189         return memif_connect(dev);
 190 }
 191
 192 static int
 193 memif_dev_info(struct rte_eth_dev *dev __rte_unused, struct rte_eth_dev_info *dev_info)
 194 {
 195         dev_info->max_mac_addrs = 1;
 196         dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
 197         dev_info->max_rx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS;
 198         dev_info->max_tx_queues = ETH_MEMIF_MAX_NUM_Q_PAIRS;
 199         dev_info->min_rx_bufsize = 0;
 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_s2m_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 master */
 249 static void
 250 memif_free_stored_mbufs(struct pmd_process_private *proc_private, struct memif_queue *mq)
 251 {
 252         uint16_t mask = (1 << mq->log2_ring_size) - 1;
 253         memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
 254
 255         /* FIXME: improve performance */
 256         /* The ring->tail acts as a guard variable between Tx and Rx
 257          * threads, so using load-acquire pairs with store-release
 258          * to synchronize it between threads.
 259          */
 260         while (mq->last_tail != __atomic_load_n(&ring->tail,
 261                                                 __ATOMIC_ACQUIRE)) {
 262                 RTE_MBUF_PREFETCH_TO_FREE(mq->buffers[(mq->last_tail + 1) & mask]);
 263                 /* Decrement refcnt and free mbuf. (current segment) */
 264                 rte_mbuf_refcnt_update(mq->buffers[mq->last_tail & mask], -1);
 265                 rte_pktmbuf_free_seg(mq->buffers[mq->last_tail & mask]);
 266                 mq->last_tail++;
 267         }
 268 }
 269
 270 static int
 271 memif_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *cur_tail,
 272                     struct rte_mbuf *tail)
 273 {
 274         /* Check for number-of-segments-overflow */
 275         if (unlikely(head->nb_segs + tail->nb_segs > RTE_MBUF_MAX_NB_SEGS))
 276                 return -EOVERFLOW;
 277
 278         /* Chain 'tail' onto the old tail */
 279         cur_tail->next = tail;
 280
 281         /* accumulate number of segments and total length. */
 282         head->nb_segs = (uint16_t)(head->nb_segs + tail->nb_segs);
 283
 284         tail->pkt_len = tail->data_len;
 285         head->pkt_len += tail->pkt_len;
 286
 287         return 0;
 288 }
 289
 290 static uint16_t
 291 eth_memif_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 292 {
 293         struct memif_queue *mq = queue;
 294         struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
 295         struct pmd_process_private *proc_private =
 296                 rte_eth_devices[mq->in_port].process_private;
 297         memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
 298         uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0;
 299         uint16_t n_rx_pkts = 0;
 300         uint16_t mbuf_size = rte_pktmbuf_data_room_size(mq->mempool) -
 301                 RTE_PKTMBUF_HEADROOM;
 302         uint16_t src_len, src_off, dst_len, dst_off, cp_len;
 303         memif_ring_type_t type = mq->type;
 304         memif_desc_t *d0;
 305         struct rte_mbuf *mbuf, *mbuf_head, *mbuf_tail;
 306         uint64_t b;
 307         ssize_t size __rte_unused;
 308         uint16_t head;
 309         int ret;
 310         struct rte_eth_link link;
 311
 312         if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
 313                 return 0;
 314         if (unlikely(ring == NULL)) {
 315                 /* Secondary process will attempt to request regions. */
 316                 ret = rte_eth_link_get(mq->in_port, &link);
 317                 if (ret < 0)
 318                         MIF_LOG(ERR, "Failed to get port %u link info: %s",
 319                                 mq->in_port, rte_strerror(-ret));
 320                 return 0;
 321         }
 322
 323         /* consume interrupt */
 324         if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0)
 325                 size = read(mq->intr_handle.fd, &b, sizeof(b));
 326
 327         ring_size = 1 << mq->log2_ring_size;
 328         mask = ring_size - 1;
 329
 330         if (type == MEMIF_RING_S2M) {
 331                 cur_slot = mq->last_head;
 332                 last_slot = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE);
 333         } else {
 334                 cur_slot = mq->last_tail;
 335                 last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
 336         }
 337
 338         if (cur_slot == last_slot)
 339                 goto refill;
 340         n_slots = last_slot - cur_slot;
 341
 342         while (n_slots && n_rx_pkts < nb_pkts) {
 343                 mbuf_head = rte_pktmbuf_alloc(mq->mempool);
 344                 if (unlikely(mbuf_head == NULL))
 345                         goto no_free_bufs;
 346                 mbuf = mbuf_head;
 347                 mbuf->port = mq->in_port;
 348
 349 next_slot:
 350                 s0 = cur_slot & mask;
 351                 d0 = &ring->desc[s0];
 352
 353                 src_len = d0->length;
 354                 dst_off = 0;
 355                 src_off = 0;
 356
 357                 do {
 358                         dst_len = mbuf_size - dst_off;
 359                         if (dst_len == 0) {
 360                                 dst_off = 0;
 361                                 dst_len = mbuf_size;
 362
 363                                 /* store pointer to tail */
 364                                 mbuf_tail = mbuf;
 365                                 mbuf = rte_pktmbuf_alloc(mq->mempool);
 366                                 if (unlikely(mbuf == NULL))
 367                                         goto no_free_bufs;
 368                                 mbuf->port = mq->in_port;
 369                                 ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf);
 370                                 if (unlikely(ret < 0)) {
 371                                         MIF_LOG(ERR, "number-of-segments-overflow");
 372                                         rte_pktmbuf_free(mbuf);
 373                                         goto no_free_bufs;
 374                                 }
 375                         }
 376                         cp_len = RTE_MIN(dst_len, src_len);
 377
 378                         rte_pktmbuf_data_len(mbuf) += cp_len;
 379                         rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf);
 380                         if (mbuf != mbuf_head)
 381                                 rte_pktmbuf_pkt_len(mbuf_head) += cp_len;
 382
 383                         memcpy(rte_pktmbuf_mtod_offset(mbuf, void *, dst_off),
 384                                (uint8_t *)memif_get_buffer(proc_private, d0) + src_off,
 385                                cp_len);
 386
 387                         src_off += cp_len;
 388                         dst_off += cp_len;
 389                         src_len -= cp_len;
 390                 } while (src_len);
 391
 392                 cur_slot++;
 393                 n_slots--;
 394
 395                 if (d0->flags & MEMIF_DESC_FLAG_NEXT)
 396                         goto next_slot;
 397
 398                 mq->n_bytes += rte_pktmbuf_pkt_len(mbuf_head);
 399                 *bufs++ = mbuf_head;
 400                 n_rx_pkts++;
 401         }
 402
 403 no_free_bufs:
 404         if (type == MEMIF_RING_S2M) {
 405                 __atomic_store_n(&ring->tail, cur_slot, __ATOMIC_RELEASE);
 406                 mq->last_head = cur_slot;
 407         } else {
 408                 mq->last_tail = cur_slot;
 409         }
 410
 411 refill:
 412         if (type == MEMIF_RING_M2S) {
 413                 head = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE);
 414                 n_slots = ring_size - head + mq->last_tail;
 415
 416                 while (n_slots--) {
 417                         s0 = head++ & mask;
 418                         d0 = &ring->desc[s0];
 419                         d0->length = pmd->run.pkt_buffer_size;
 420                 }
 421                 __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE);
 422         }
 423
 424         mq->n_pkts += n_rx_pkts;
 425         return n_rx_pkts;
 426 }
 427
 428 static uint16_t
 429 eth_memif_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 430 {
 431         struct memif_queue *mq = queue;
 432         struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
 433         struct pmd_process_private *proc_private =
 434                 rte_eth_devices[mq->in_port].process_private;
 435         memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
 436         uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0, head;
 437         uint16_t n_rx_pkts = 0;
 438         memif_desc_t *d0;
 439         struct rte_mbuf *mbuf, *mbuf_tail;
 440         struct rte_mbuf *mbuf_head = NULL;
 441         int ret;
 442         struct rte_eth_link link;
 443
 444         if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
 445                 return 0;
 446         if (unlikely(ring == NULL)) {
 447                 /* Secondary process will attempt to request regions. */
 448                 rte_eth_link_get(mq->in_port, &link);
 449                 return 0;
 450         }
 451
 452         /* consume interrupt */
 453         if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
 454                 uint64_t b;
 455                 ssize_t size __rte_unused;
 456                 size = read(mq->intr_handle.fd, &b, sizeof(b));
 457         }
 458
 459         ring_size = 1 << mq->log2_ring_size;
 460         mask = ring_size - 1;
 461
 462         cur_slot = mq->last_tail;
 463         /* The ring->tail acts as a guard variable between Tx and Rx
 464          * threads, so using load-acquire pairs with store-release
 465          * to synchronize it between threads.
 466          */
 467         last_slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
 468         if (cur_slot == last_slot)
 469                 goto refill;
 470         n_slots = last_slot - cur_slot;
 471
 472         while (n_slots && n_rx_pkts < nb_pkts) {
 473                 s0 = cur_slot & mask;
 474
 475                 d0 = &ring->desc[s0];
 476                 mbuf_head = mq->buffers[s0];
 477                 mbuf = mbuf_head;
 478
 479 next_slot:
 480                 /* prefetch next descriptor */
 481                 if (n_rx_pkts + 1 < nb_pkts)
 482                         rte_prefetch0(&ring->desc[(cur_slot + 1) & mask]);
 483
 484                 mbuf->port = mq->in_port;
 485                 rte_pktmbuf_data_len(mbuf) = d0->length;
 486                 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf);
 487
 488                 mq->n_bytes += rte_pktmbuf_data_len(mbuf);
 489
 490                 cur_slot++;
 491                 n_slots--;
 492                 if (d0->flags & MEMIF_DESC_FLAG_NEXT) {
 493                         s0 = cur_slot & mask;
 494                         d0 = &ring->desc[s0];
 495                         mbuf_tail = mbuf;
 496                         mbuf = mq->buffers[s0];
 497                         ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf);
 498                         if (unlikely(ret < 0)) {
 499                                 MIF_LOG(ERR, "number-of-segments-overflow");
 500                                 goto refill;
 501                         }
 502                         goto next_slot;
 503                 }
 504
 505                 *bufs++ = mbuf_head;
 506                 n_rx_pkts++;
 507         }
 508
 509         mq->last_tail = cur_slot;
 510
 511 /* Supply master with new buffers */
 512 refill:
 513         /* The ring->head acts as a guard variable between Tx and Rx
 514          * threads, so using load-acquire pairs with store-release
 515          * to synchronize it between threads.
 516          */
 517         head = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE);
 518         n_slots = ring_size - head + mq->last_tail;
 519
 520         if (n_slots < 32)
 521                 goto no_free_mbufs;
 522
 523         ret = rte_pktmbuf_alloc_bulk(mq->mempool, &mq->buffers[head & mask], n_slots);
 524         if (unlikely(ret < 0))
 525                 goto no_free_mbufs;
 526
 527         while (n_slots--) {
 528                 s0 = head++ & mask;
 529                 if (n_slots > 0)
 530                         rte_prefetch0(mq->buffers[head & mask]);
 531                 d0 = &ring->desc[s0];
 532                 /* store buffer header */
 533                 mbuf = mq->buffers[s0];
 534                 /* populate descriptor */
 535                 d0->length = rte_pktmbuf_data_room_size(mq->mempool) -
 536                                 RTE_PKTMBUF_HEADROOM;
 537                 d0->region = 1;
 538                 d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) -
 539                         (uint8_t *)proc_private->regions[d0->region]->addr;
 540         }
 541 no_free_mbufs:
 542         __atomic_store_n(&ring->head, head, __ATOMIC_RELEASE);
 543
 544         mq->n_pkts += n_rx_pkts;
 545
 546         return n_rx_pkts;
 547 }
 548
 549 static uint16_t
 550 eth_memif_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 551 {
 552         struct memif_queue *mq = queue;
 553         struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
 554         struct pmd_process_private *proc_private =
 555                 rte_eth_devices[mq->in_port].process_private;
 556         memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
 557         uint16_t slot, saved_slot, n_free, ring_size, mask, n_tx_pkts = 0;
 558         uint16_t src_len, src_off, dst_len, dst_off, cp_len;
 559         memif_ring_type_t type = mq->type;
 560         memif_desc_t *d0;
 561         struct rte_mbuf *mbuf;
 562         struct rte_mbuf *mbuf_head;
 563         uint64_t a;
 564         ssize_t size;
 565         struct rte_eth_link link;
 566
 567         if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
 568                 return 0;
 569         if (unlikely(ring == NULL)) {
 570                 int ret;
 571
 572                 /* Secondary process will attempt to request regions. */
 573                 ret = rte_eth_link_get(mq->in_port, &link);
 574                 if (ret < 0)
 575                         MIF_LOG(ERR, "Failed to get port %u link info: %s",
 576                                 mq->in_port, rte_strerror(-ret));
 577                 return 0;
 578         }
 579
 580         ring_size = 1 << mq->log2_ring_size;
 581         mask = ring_size - 1;
 582
 583         n_free = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE) - mq->last_tail;
 584         mq->last_tail += n_free;
 585
 586         if (type == MEMIF_RING_S2M) {
 587                 slot = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE);
 588                 n_free = ring_size - slot + mq->last_tail;
 589         } else {
 590                 slot = __atomic_load_n(&ring->tail, __ATOMIC_ACQUIRE);
 591                 n_free = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE) - slot;
 592         }
 593
 594         while (n_tx_pkts < nb_pkts && n_free) {
 595                 mbuf_head = *bufs++;
 596                 mbuf = mbuf_head;
 597
 598                 saved_slot = slot;
 599                 d0 = &ring->desc[slot & mask];
 600                 dst_off = 0;
 601                 dst_len = (type == MEMIF_RING_S2M) ?
 602                         pmd->run.pkt_buffer_size : d0->length;
 603
 604 next_in_chain:
 605                 src_off = 0;
 606                 src_len = rte_pktmbuf_data_len(mbuf);
 607
 608                 while (src_len) {
 609                         if (dst_len == 0) {
 610                                 if (n_free) {
 611                                         slot++;
 612                                         n_free--;
 613                                         d0->flags |= MEMIF_DESC_FLAG_NEXT;
 614                                         d0 = &ring->desc[slot & mask];
 615                                         dst_off = 0;
 616                                         dst_len = (type == MEMIF_RING_S2M) ?
 617                                             pmd->run.pkt_buffer_size : d0->length;
 618                                         d0->flags = 0;
 619                                 } else {
 620                                         slot = saved_slot;
 621                                         goto no_free_slots;
 622                                 }
 623                         }
 624                         cp_len = RTE_MIN(dst_len, src_len);
 625
 626                         memcpy((uint8_t *)memif_get_buffer(proc_private, d0) + dst_off,
 627                                rte_pktmbuf_mtod_offset(mbuf, void *, src_off),
 628                                cp_len);
 629
 630                         mq->n_bytes += cp_len;
 631                         src_off += cp_len;
 632                         dst_off += cp_len;
 633                         src_len -= cp_len;
 634                         dst_len -= cp_len;
 635
 636                         d0->length = dst_off;
 637                 }
 638
 639                 if (rte_pktmbuf_is_contiguous(mbuf) == 0) {
 640                         mbuf = mbuf->next;
 641                         goto next_in_chain;
 642                 }
 643
 644                 n_tx_pkts++;
 645                 slot++;
 646                 n_free--;
 647                 rte_pktmbuf_free(mbuf_head);
 648         }
 649
 650 no_free_slots:
 651         if (type == MEMIF_RING_S2M)
 652                 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE);
 653         else
 654                 __atomic_store_n(&ring->tail, slot, __ATOMIC_RELEASE);
 655
 656         if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
 657                 a = 1;
 658                 size = write(mq->intr_handle.fd, &a, sizeof(a));
 659                 if (unlikely(size < 0)) {
 660                         MIF_LOG(WARNING,
 661                                 "Failed to send interrupt. %s", strerror(errno));
 662                 }
 663         }
 664
 665         mq->n_pkts += n_tx_pkts;
 666         return n_tx_pkts;
 667 }
 668
 669
 670 static int
 671 memif_tx_one_zc(struct pmd_process_private *proc_private, struct memif_queue *mq,
 672                 memif_ring_t *ring, struct rte_mbuf *mbuf, const uint16_t mask,
 673                 uint16_t slot, uint16_t n_free)
 674 {
 675         memif_desc_t *d0;
 676         int used_slots = 1;
 677
 678 next_in_chain:
 679         /* store pointer to mbuf to free it later */
 680         mq->buffers[slot & mask] = mbuf;
 681         /* Increment refcnt to make sure the buffer is not freed before master
 682          * receives it. (current segment)
 683          */
 684         rte_mbuf_refcnt_update(mbuf, 1);
 685         /* populate descriptor */
 686         d0 = &ring->desc[slot & mask];
 687         d0->length = rte_pktmbuf_data_len(mbuf);
 688         /* FIXME: get region index */
 689         d0->region = 1;
 690         d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) -
 691                 (uint8_t *)proc_private->regions[d0->region]->addr;
 692         d0->flags = 0;
 693
 694         /* check if buffer is chained */
 695         if (rte_pktmbuf_is_contiguous(mbuf) == 0) {
 696                 if (n_free < 2)
 697                         return 0;
 698                 /* mark buffer as chained */
 699                 d0->flags |= MEMIF_DESC_FLAG_NEXT;
 700                 /* advance mbuf */
 701                 mbuf = mbuf->next;
 702                 /* update counters */
 703                 used_slots++;
 704                 slot++;
 705                 n_free--;
 706                 goto next_in_chain;
 707         }
 708         return used_slots;
 709 }
 710
 711 static uint16_t
 712 eth_memif_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
 713 {
 714         struct memif_queue *mq = queue;
 715         struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
 716         struct pmd_process_private *proc_private =
 717                 rte_eth_devices[mq->in_port].process_private;
 718         memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
 719         uint16_t slot, n_free, ring_size, mask, n_tx_pkts = 0;
 720         memif_ring_type_t type = mq->type;
 721         struct rte_eth_link link;
 722
 723         if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
 724                 return 0;
 725         if (unlikely(ring == NULL)) {
 726                 /* Secondary process will attempt to request regions. */
 727                 rte_eth_link_get(mq->in_port, &link);
 728                 return 0;
 729         }
 730
 731         ring_size = 1 << mq->log2_ring_size;
 732         mask = ring_size - 1;
 733
 734         /* free mbufs received by master */
 735         memif_free_stored_mbufs(proc_private, mq);
 736
 737         /* ring type always MEMIF_RING_S2M */
 738         /* The ring->head acts as a guard variable between Tx and Rx
 739          * threads, so using load-acquire pairs with store-release
 740          * to synchronize it between threads.
 741          */
 742         slot = __atomic_load_n(&ring->head, __ATOMIC_ACQUIRE);
 743         n_free = ring_size - slot + mq->last_tail;
 744
 745         int used_slots;
 746
 747         while (n_free && (n_tx_pkts < nb_pkts)) {
 748                 while ((n_free > 4) && ((nb_pkts - n_tx_pkts) > 4)) {
 749                         if ((nb_pkts - n_tx_pkts) > 8) {
 750                                 rte_prefetch0(*bufs + 4);
 751                                 rte_prefetch0(*bufs + 5);
 752                                 rte_prefetch0(*bufs + 6);
 753                                 rte_prefetch0(*bufs + 7);
 754                         }
 755                         used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
 756                                 mask, slot, n_free);
 757                         if (unlikely(used_slots < 1))
 758                                 goto no_free_slots;
 759                         n_tx_pkts++;
 760                         slot += used_slots;
 761                         n_free -= used_slots;
 762
 763                         used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
 764                                 mask, slot, n_free);
 765                         if (unlikely(used_slots < 1))
 766                                 goto no_free_slots;
 767                         n_tx_pkts++;
 768                         slot += used_slots;
 769                         n_free -= used_slots;
 770
 771                         used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
 772                                 mask, slot, n_free);
 773                         if (unlikely(used_slots < 1))
 774                                 goto no_free_slots;
 775                         n_tx_pkts++;
 776                         slot += used_slots;
 777                         n_free -= used_slots;
 778
 779                         used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
 780                                 mask, slot, n_free);
 781                         if (unlikely(used_slots < 1))
 782                                 goto no_free_slots;
 783                         n_tx_pkts++;
 784                         slot += used_slots;
 785                         n_free -= used_slots;
 786                 }
 787                 used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
 788                         mask, slot, n_free);
 789                 if (unlikely(used_slots < 1))
 790                         goto no_free_slots;
 791                 n_tx_pkts++;
 792                 slot += used_slots;
 793                 n_free -= used_slots;
 794         }
 795
 796 no_free_slots:
 797         /* update ring pointers */
 798         if (type == MEMIF_RING_S2M)
 799                 __atomic_store_n(&ring->head, slot, __ATOMIC_RELEASE);
 800         else
 801                 __atomic_store_n(&ring->tail, slot, __ATOMIC_RELEASE);
 802
 803         /* Send interrupt, if enabled. */
 804         if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
 805                 uint64_t a = 1;
 806                 ssize_t size = write(mq->intr_handle.fd, &a, sizeof(a));
 807                 if (unlikely(size < 0)) {
 808                         MIF_LOG(WARNING,
 809                                 "Failed to send interrupt. %s", strerror(errno));
 810                 }
 811         }
 812
 813         /* increment queue counters */
 814         mq->n_pkts += n_tx_pkts;
 815
 816         return n_tx_pkts;
 817 }
 818
 819 void
 820 memif_free_regions(struct rte_eth_dev *dev)
 821 {
 822         struct pmd_process_private *proc_private = dev->process_private;
 823         struct pmd_internals *pmd = dev->data->dev_private;
 824         int i;
 825         struct memif_region *r;
 826
 827         /* regions are allocated contiguously, so it's
 828          * enough to loop until 'proc_private->regions_num'
 829          */
 830         for (i = 0; i < proc_private->regions_num; i++) {
 831                 r = proc_private->regions[i];
 832                 if (r != NULL) {
 833                         /* This is memzone */
 834                         if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) {
 835                                 r->addr = NULL;
 836                                 if (r->fd > 0)
 837                                         close(r->fd);
 838                         }
 839                         if (r->addr != NULL) {
 840                                 munmap(r->addr, r->region_size);
 841                                 if (r->fd > 0) {
 842                                         close(r->fd);
 843                                         r->fd = -1;
 844                                 }
 845                         }
 846                         rte_free(r);
 847                         proc_private->regions[i] = NULL;
 848                 }
 849         }
 850         proc_private->regions_num = 0;
 851 }
 852
 853 static int
 854 memif_region_init_zc(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
 855                      void *arg)
 856 {
 857         struct pmd_process_private *proc_private = (struct pmd_process_private *)arg;
 858         struct memif_region *r;
 859
 860         if (proc_private->regions_num < 1) {
 861                 MIF_LOG(ERR, "Missing descriptor region");
 862                 return -1;
 863         }
 864
 865         r = proc_private->regions[proc_private->regions_num - 1];
 866
 867         if (r->addr != msl->base_va)
 868                 r = proc_private->regions[++proc_private->regions_num - 1];
 869
 870         if (r == NULL) {
 871                 r = rte_zmalloc("region", sizeof(struct memif_region), 0);
 872                 if (r == NULL) {
 873                         MIF_LOG(ERR, "Failed to alloc memif region.");
 874                         return -ENOMEM;
 875                 }
 876
 877                 r->addr = msl->base_va;
 878                 r->region_size = ms->len;
 879                 r->fd = rte_memseg_get_fd(ms);
 880                 if (r->fd < 0)
 881                         return -1;
 882                 r->pkt_buffer_offset = 0;
 883
 884                 proc_private->regions[proc_private->regions_num - 1] = r;
 885         } else {
 886                 r->region_size += ms->len;
 887         }
 888
 889         return 0;
 890 }
 891
 892 static int
 893 memif_region_init_shm(struct rte_eth_dev *dev, uint8_t has_buffers)
 894 {
 895         struct pmd_internals *pmd = dev->data->dev_private;
 896         struct pmd_process_private *proc_private = dev->process_private;
 897         char shm_name[ETH_MEMIF_SHM_NAME_SIZE];
 898         int ret = 0;
 899         struct memif_region *r;
 900
 901         if (proc_private->regions_num >= ETH_MEMIF_MAX_REGION_NUM) {
 902                 MIF_LOG(ERR, "Too many regions.");
 903                 return -1;
 904         }
 905
 906         r = rte_zmalloc("region", sizeof(struct memif_region), 0);
 907         if (r == NULL) {
 908                 MIF_LOG(ERR, "Failed to alloc memif region.");
 909                 return -ENOMEM;
 910         }
 911
 912         /* calculate buffer offset */
 913         r->pkt_buffer_offset = (pmd->run.num_s2m_rings + pmd->run.num_m2s_rings) *
 914             (sizeof(memif_ring_t) + sizeof(memif_desc_t) *
 915             (1 << pmd->run.log2_ring_size));
 916
 917         r->region_size = r->pkt_buffer_offset;
 918         /* if region has buffers, add buffers size to region_size */
 919         if (has_buffers == 1)
 920                 r->region_size += (uint32_t)(pmd->run.pkt_buffer_size *
 921                         (1 << pmd->run.log2_ring_size) *
 922                         (pmd->run.num_s2m_rings +
 923                          pmd->run.num_m2s_rings));
 924
 925         memset(shm_name, 0, sizeof(char) * ETH_MEMIF_SHM_NAME_SIZE);
 926         snprintf(shm_name, ETH_MEMIF_SHM_NAME_SIZE, "memif_region_%d",
 927                  proc_private->regions_num);
 928
 929         r->fd = memfd_create(shm_name, MFD_ALLOW_SEALING);
 930         if (r->fd < 0) {
 931                 MIF_LOG(ERR, "Failed to create shm file: %s.", strerror(errno));
 932                 ret = -1;
 933                 goto error;
 934         }
 935
 936         ret = fcntl(r->fd, F_ADD_SEALS, F_SEAL_SHRINK);
 937         if (ret < 0) {
 938                 MIF_LOG(ERR, "Failed to add seals to shm file: %s.", strerror(errno));
 939                 goto error;
 940         }
 941
 942         ret = ftruncate(r->fd, r->region_size);
 943         if (ret < 0) {
 944                 MIF_LOG(ERR, "Failed to truncate shm file: %s.", strerror(errno));
 945                 goto error;
 946         }
 947
 948         r->addr = mmap(NULL, r->region_size, PROT_READ |
 949                        PROT_WRITE, MAP_SHARED, r->fd, 0);
 950         if (r->addr == MAP_FAILED) {
 951                 MIF_LOG(ERR, "Failed to mmap shm region: %s.", strerror(ret));
 952                 ret = -1;
 953                 goto error;
 954         }
 955
 956         proc_private->regions[proc_private->regions_num] = r;
 957         proc_private->regions_num++;
 958
 959         return ret;
 960
 961 error:
 962         if (r->fd > 0)
 963                 close(r->fd);
 964         r->fd = -1;
 965
 966         return ret;
 967 }
 968
 969 static int
 970 memif_regions_init(struct rte_eth_dev *dev)
 971 {
 972         struct pmd_internals *pmd = dev->data->dev_private;
 973         int ret;
 974
 975         /*
 976          * Zero-copy exposes dpdk memory.
 977          * Each memseg list will be represented by memif region.
 978          * Zero-copy regions indexing: memseg list idx + 1,
 979          * as we already have region 0 reserved for descriptors.
 980          */
 981         if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
 982                 /* create region idx 0 containing descriptors */
 983                 ret = memif_region_init_shm(dev, 0);
 984                 if (ret < 0)
 985                         return ret;
 986                 ret = rte_memseg_walk(memif_region_init_zc, (void *)dev->process_private);
 987                 if (ret < 0)
 988                         return ret;
 989         } else {
 990                 /* create one memory region contaning rings and buffers */
 991                 ret = memif_region_init_shm(dev, /* has buffers */ 1);
 992                 if (ret < 0)
 993                         return ret;
 994         }
 995
 996         return 0;
 997 }
 998
 999 static void
1000 memif_init_rings(struct rte_eth_dev *dev)
1001 {
1002         struct pmd_internals *pmd = dev->data->dev_private;
1003         struct pmd_process_private *proc_private = dev->process_private;
1004         memif_ring_t *ring;
1005         int i, j;
1006         uint16_t slot;
1007
1008         for (i = 0; i < pmd->run.num_s2m_rings; i++) {
1009                 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_S2M, i);
1010                 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1011                 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1012                 ring->cookie = MEMIF_COOKIE;
1013                 ring->flags = 0;
1014
1015                 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)
1016                         continue;
1017
1018                 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
1019                         slot = i * (1 << pmd->run.log2_ring_size) + j;
1020                         ring->desc[j].region = 0;
1021                         ring->desc[j].offset =
1022                                 proc_private->regions[0]->pkt_buffer_offset +
1023                                 (uint32_t)(slot * pmd->run.pkt_buffer_size);
1024                         ring->desc[j].length = pmd->run.pkt_buffer_size;
1025                 }
1026         }
1027
1028         for (i = 0; i < pmd->run.num_m2s_rings; i++) {
1029                 ring = memif_get_ring(pmd, proc_private, MEMIF_RING_M2S, i);
1030                 __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1031                 __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1032                 ring->cookie = MEMIF_COOKIE;
1033                 ring->flags = 0;
1034
1035                 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)
1036                         continue;
1037
1038                 for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
1039                         slot = (i + pmd->run.num_s2m_rings) *
1040                             (1 << pmd->run.log2_ring_size) + j;
1041                         ring->desc[j].region = 0;
1042                         ring->desc[j].offset =
1043                                 proc_private->regions[0]->pkt_buffer_offset +
1044                                 (uint32_t)(slot * pmd->run.pkt_buffer_size);
1045                         ring->desc[j].length = pmd->run.pkt_buffer_size;
1046                 }
1047         }
1048 }
1049
1050 /* called only by slave */
1051 static int
1052 memif_init_queues(struct rte_eth_dev *dev)
1053 {
1054         struct pmd_internals *pmd = dev->data->dev_private;
1055         struct memif_queue *mq;
1056         int i;
1057
1058         for (i = 0; i < pmd->run.num_s2m_rings; i++) {
1059                 mq = dev->data->tx_queues[i];
1060                 mq->log2_ring_size = pmd->run.log2_ring_size;
1061                 /* queues located only in region 0 */
1062                 mq->region = 0;
1063                 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_S2M, i);
1064                 mq->last_head = 0;
1065                 mq->last_tail = 0;
1066                 mq->intr_handle.fd = eventfd(0, EFD_NONBLOCK);
1067                 if (mq->intr_handle.fd < 0) {
1068                         MIF_LOG(WARNING,
1069                                 "Failed to create eventfd for tx queue %d: %s.", i,
1070                                 strerror(errno));
1071                 }
1072                 mq->buffers = NULL;
1073                 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1074                         mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) *
1075                                                   (1 << mq->log2_ring_size), 0);
1076                         if (mq->buffers == NULL)
1077                                 return -ENOMEM;
1078                 }
1079         }
1080
1081         for (i = 0; i < pmd->run.num_m2s_rings; i++) {
1082                 mq = dev->data->rx_queues[i];
1083                 mq->log2_ring_size = pmd->run.log2_ring_size;
1084                 /* queues located only in region 0 */
1085                 mq->region = 0;
1086                 mq->ring_offset = memif_get_ring_offset(dev, mq, MEMIF_RING_M2S, i);
1087                 mq->last_head = 0;
1088                 mq->last_tail = 0;
1089                 mq->intr_handle.fd = eventfd(0, EFD_NONBLOCK);
1090                 if (mq->intr_handle.fd < 0) {
1091                         MIF_LOG(WARNING,
1092                                 "Failed to create eventfd for rx queue %d: %s.", i,
1093                                 strerror(errno));
1094                 }
1095                 mq->buffers = NULL;
1096                 if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1097                         mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) *
1098                                                   (1 << mq->log2_ring_size), 0);
1099                         if (mq->buffers == NULL)
1100                                 return -ENOMEM;
1101                 }
1102         }
1103         return 0;
1104 }
1105
1106 int
1107 memif_init_regions_and_queues(struct rte_eth_dev *dev)
1108 {
1109         int ret;
1110
1111         ret = memif_regions_init(dev);
1112         if (ret < 0)
1113                 return ret;
1114
1115         memif_init_rings(dev);
1116
1117         ret = memif_init_queues(dev);
1118         if (ret < 0)
1119                 return ret;
1120
1121         return 0;
1122 }
1123
1124 int
1125 memif_connect(struct rte_eth_dev *dev)
1126 {
1127         struct pmd_internals *pmd = dev->data->dev_private;
1128         struct pmd_process_private *proc_private = dev->process_private;
1129         struct memif_region *mr;
1130         struct memif_queue *mq;
1131         memif_ring_t *ring;
1132         int i;
1133
1134         for (i = 0; i < proc_private->regions_num; i++) {
1135                 mr = proc_private->regions[i];
1136                 if (mr != NULL) {
1137                         if (mr->addr == NULL) {
1138                                 if (mr->fd < 0)
1139                                         return -1;
1140                                 mr->addr = mmap(NULL, mr->region_size,
1141                                                 PROT_READ | PROT_WRITE,
1142                                                 MAP_SHARED, mr->fd, 0);
1143                                 if (mr->addr == MAP_FAILED) {
1144                                         MIF_LOG(ERR, "mmap failed: %s\n",
1145                                                 strerror(errno));
1146                                         return -1;
1147                                 }
1148                         }
1149                         if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) {
1150                                 /* close memseg file */
1151                                 close(mr->fd);
1152                                 mr->fd = -1;
1153                         }
1154                 }
1155         }
1156
1157         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1158                 for (i = 0; i < pmd->run.num_s2m_rings; i++) {
1159                         mq = (pmd->role == MEMIF_ROLE_SLAVE) ?
1160                             dev->data->tx_queues[i] : dev->data->rx_queues[i];
1161                         ring = memif_get_ring_from_queue(proc_private, mq);
1162                         if (ring == NULL || ring->cookie != MEMIF_COOKIE) {
1163                                 MIF_LOG(ERR, "Wrong ring");
1164                                 return -1;
1165                         }
1166                         __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1167                         __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1168                         mq->last_head = 0;
1169                         mq->last_tail = 0;
1170                         /* enable polling mode */
1171                         if (pmd->role == MEMIF_ROLE_MASTER)
1172                                 ring->flags = MEMIF_RING_FLAG_MASK_INT;
1173                 }
1174                 for (i = 0; i < pmd->run.num_m2s_rings; i++) {
1175                         mq = (pmd->role == MEMIF_ROLE_SLAVE) ?
1176                             dev->data->rx_queues[i] : dev->data->tx_queues[i];
1177                         ring = memif_get_ring_from_queue(proc_private, mq);
1178                         if (ring == NULL || ring->cookie != MEMIF_COOKIE) {
1179                                 MIF_LOG(ERR, "Wrong ring");
1180                                 return -1;
1181                         }
1182                         __atomic_store_n(&ring->head, 0, __ATOMIC_RELAXED);
1183                         __atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
1184                         mq->last_head = 0;
1185                         mq->last_tail = 0;
1186                         /* enable polling mode */
1187                         if (pmd->role == MEMIF_ROLE_SLAVE)
1188                                 ring->flags = MEMIF_RING_FLAG_MASK_INT;
1189                 }
1190
1191                 pmd->flags &= ~ETH_MEMIF_FLAG_CONNECTING;
1192                 pmd->flags |= ETH_MEMIF_FLAG_CONNECTED;
1193                 dev->data->dev_link.link_status = ETH_LINK_UP;
1194         }
1195         MIF_LOG(INFO, "Connected.");
1196         return 0;
1197 }
1198
1199 static int
1200 memif_dev_start(struct rte_eth_dev *dev)
1201 {
1202         struct pmd_internals *pmd = dev->data->dev_private;
1203         int ret = 0;
1204
1205         switch (pmd->role) {
1206         case MEMIF_ROLE_SLAVE:
1207                 ret = memif_connect_slave(dev);
1208                 break;
1209         case MEMIF_ROLE_MASTER:
1210                 ret = memif_connect_master(dev);
1211                 break;
1212         default:
1213                 MIF_LOG(ERR, "Unknown role: %d.", pmd->role);
1214                 ret = -1;
1215                 break;
1216         }
1217
1218         return ret;
1219 }
1220
1221 static void
1222 memif_dev_close(struct rte_eth_dev *dev)
1223 {
1224         struct pmd_internals *pmd = dev->data->dev_private;
1225         int i;
1226
1227         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1228                 memif_msg_enq_disconnect(pmd->cc, "Device closed", 0);
1229                 memif_disconnect(dev);
1230
1231                 for (i = 0; i < dev->data->nb_rx_queues; i++)
1232                         (*dev->dev_ops->rx_queue_release)(dev->data->rx_queues[i]);
1233                 for (i = 0; i < dev->data->nb_tx_queues; i++)
1234                         (*dev->dev_ops->tx_queue_release)(dev->data->tx_queues[i]);
1235
1236                 memif_socket_remove_device(dev);
1237         } else {
1238                 memif_disconnect(dev);
1239         }
1240
1241         rte_free(dev->process_private);
1242 }
1243
1244 static int
1245 memif_dev_configure(struct rte_eth_dev *dev)
1246 {
1247         struct pmd_internals *pmd = dev->data->dev_private;
1248
1249         /*
1250          * SLAVE - TXQ
1251          * MASTER - RXQ
1252          */
1253         pmd->cfg.num_s2m_rings = (pmd->role == MEMIF_ROLE_SLAVE) ?
1254                                   dev->data->nb_tx_queues : dev->data->nb_rx_queues;
1255
1256         /*
1257          * SLAVE - RXQ
1258          * MASTER - TXQ
1259          */
1260         pmd->cfg.num_m2s_rings = (pmd->role == MEMIF_ROLE_SLAVE) ?
1261                                   dev->data->nb_rx_queues : dev->data->nb_tx_queues;
1262
1263         return 0;
1264 }
1265
1266 static int
1267 memif_tx_queue_setup(struct rte_eth_dev *dev,
1268                      uint16_t qid,
1269                      uint16_t nb_tx_desc __rte_unused,
1270                      unsigned int socket_id __rte_unused,
1271                      const struct rte_eth_txconf *tx_conf __rte_unused)
1272 {
1273         struct pmd_internals *pmd = dev->data->dev_private;
1274         struct memif_queue *mq;
1275
1276         mq = rte_zmalloc("tx-queue", sizeof(struct memif_queue), 0);
1277         if (mq == NULL) {
1278                 MIF_LOG(ERR, "Failed to allocate tx queue id: %u", qid);
1279                 return -ENOMEM;
1280         }
1281
1282         mq->type =
1283             (pmd->role == MEMIF_ROLE_SLAVE) ? MEMIF_RING_S2M : MEMIF_RING_M2S;
1284         mq->n_pkts = 0;
1285         mq->n_bytes = 0;
1286         mq->intr_handle.fd = -1;
1287         mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
1288         mq->in_port = dev->data->port_id;
1289         dev->data->tx_queues[qid] = mq;
1290
1291         return 0;
1292 }
1293
1294 static int
1295 memif_rx_queue_setup(struct rte_eth_dev *dev,
1296                      uint16_t qid,
1297                      uint16_t nb_rx_desc __rte_unused,
1298                      unsigned int socket_id __rte_unused,
1299                      const struct rte_eth_rxconf *rx_conf __rte_unused,
1300                      struct rte_mempool *mb_pool)
1301 {
1302         struct pmd_internals *pmd = dev->data->dev_private;
1303         struct memif_queue *mq;
1304
1305         mq = rte_zmalloc("rx-queue", sizeof(struct memif_queue), 0);
1306         if (mq == NULL) {
1307                 MIF_LOG(ERR, "Failed to allocate rx queue id: %u", qid);
1308                 return -ENOMEM;
1309         }
1310
1311         mq->type = (pmd->role == MEMIF_ROLE_SLAVE) ? MEMIF_RING_M2S : MEMIF_RING_S2M;
1312         mq->n_pkts = 0;
1313         mq->n_bytes = 0;
1314         mq->intr_handle.fd = -1;
1315         mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
1316         mq->mempool = mb_pool;
1317         mq->in_port = dev->data->port_id;
1318         dev->data->rx_queues[qid] = mq;
1319
1320         return 0;
1321 }
1322
1323 static void
1324 memif_queue_release(void *queue)
1325 {
1326         struct memif_queue *mq = (struct memif_queue *)queue;
1327
1328         if (!mq)
1329                 return;
1330
1331         rte_free(mq);
1332 }
1333
1334 static int
1335 memif_link_update(struct rte_eth_dev *dev,
1336                   int wait_to_complete __rte_unused)
1337 {
1338         struct pmd_process_private *proc_private;
1339
1340         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1341                 proc_private = dev->process_private;
1342                 if (dev->data->dev_link.link_status == ETH_LINK_UP &&
1343                                 proc_private->regions_num == 0) {
1344                         memif_mp_request_regions(dev);
1345                 } else if (dev->data->dev_link.link_status == ETH_LINK_DOWN &&
1346                                 proc_private->regions_num > 0) {
1347                         memif_free_regions(dev);
1348                 }
1349         }
1350         return 0;
1351 }
1352
1353 static int
1354 memif_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1355 {
1356         struct pmd_internals *pmd = dev->data->dev_private;
1357         struct memif_queue *mq;
1358         int i;
1359         uint8_t tmp, nq;
1360
1361         stats->ipackets = 0;
1362         stats->ibytes = 0;
1363         stats->opackets = 0;
1364         stats->obytes = 0;
1365
1366         tmp = (pmd->role == MEMIF_ROLE_SLAVE) ? pmd->run.num_s2m_rings :
1367             pmd->run.num_m2s_rings;
1368         nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
1369             RTE_ETHDEV_QUEUE_STAT_CNTRS;
1370
1371         /* RX stats */
1372         for (i = 0; i < nq; i++) {
1373                 mq = dev->data->rx_queues[i];
1374                 stats->q_ipackets[i] = mq->n_pkts;
1375                 stats->q_ibytes[i] = mq->n_bytes;
1376                 stats->ipackets += mq->n_pkts;
1377                 stats->ibytes += mq->n_bytes;
1378         }
1379
1380         tmp = (pmd->role == MEMIF_ROLE_SLAVE) ? pmd->run.num_m2s_rings :
1381             pmd->run.num_s2m_rings;
1382         nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
1383             RTE_ETHDEV_QUEUE_STAT_CNTRS;
1384
1385         /* TX stats */
1386         for (i = 0; i < nq; i++) {
1387                 mq = dev->data->tx_queues[i];
1388                 stats->q_opackets[i] = mq->n_pkts;
1389                 stats->q_obytes[i] = mq->n_bytes;
1390                 stats->opackets += mq->n_pkts;
1391                 stats->obytes += mq->n_bytes;
1392         }
1393         return 0;
1394 }
1395
1396 static int
1397 memif_stats_reset(struct rte_eth_dev *dev)
1398 {
1399         struct pmd_internals *pmd = dev->data->dev_private;
1400         int i;
1401         struct memif_queue *mq;
1402
1403         for (i = 0; i < pmd->run.num_s2m_rings; i++) {
1404                 mq = (pmd->role == MEMIF_ROLE_SLAVE) ? dev->data->tx_queues[i] :
1405                     dev->data->rx_queues[i];
1406                 mq->n_pkts = 0;
1407                 mq->n_bytes = 0;
1408         }
1409         for (i = 0; i < pmd->run.num_m2s_rings; i++) {
1410                 mq = (pmd->role == MEMIF_ROLE_SLAVE) ? dev->data->rx_queues[i] :
1411                     dev->data->tx_queues[i];
1412                 mq->n_pkts = 0;
1413                 mq->n_bytes = 0;
1414         }
1415
1416         return 0;
1417 }
1418
1419 static int
1420 memif_rx_queue_intr_enable(struct rte_eth_dev *dev __rte_unused,
1421                            uint16_t qid __rte_unused)
1422 {
1423         MIF_LOG(WARNING, "Interrupt mode not supported.");
1424
1425         return -1;
1426 }
1427
1428 static int
1429 memif_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t qid __rte_unused)
1430 {
1431         struct pmd_internals *pmd __rte_unused = dev->data->dev_private;
1432
1433         return 0;
1434 }
1435
1436 static const struct eth_dev_ops ops = {
1437         .dev_start = memif_dev_start,
1438         .dev_close = memif_dev_close,
1439         .dev_infos_get = memif_dev_info,
1440         .dev_configure = memif_dev_configure,
1441         .tx_queue_setup = memif_tx_queue_setup,
1442         .rx_queue_setup = memif_rx_queue_setup,
1443         .rx_queue_release = memif_queue_release,
1444         .tx_queue_release = memif_queue_release,
1445         .rx_queue_intr_enable = memif_rx_queue_intr_enable,
1446         .rx_queue_intr_disable = memif_rx_queue_intr_disable,
1447         .link_update = memif_link_update,
1448         .stats_get = memif_stats_get,
1449         .stats_reset = memif_stats_reset,
1450 };
1451
1452 static int
1453 memif_create(struct rte_vdev_device *vdev, enum memif_role_t role,
1454              memif_interface_id_t id, uint32_t flags,
1455              const char *socket_filename,
1456              memif_log2_ring_size_t log2_ring_size,
1457              uint16_t pkt_buffer_size, const char *secret,
1458              struct rte_ether_addr *ether_addr)
1459 {
1460         int ret = 0;
1461         struct rte_eth_dev *eth_dev;
1462         struct rte_eth_dev_data *data;
1463         struct pmd_internals *pmd;
1464         struct pmd_process_private *process_private;
1465         const unsigned int numa_node = vdev->device.numa_node;
1466         const char *name = rte_vdev_device_name(vdev);
1467
1468         eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1469         if (eth_dev == NULL) {
1470                 MIF_LOG(ERR, "%s: Unable to allocate device struct.", name);
1471                 return -1;
1472         }
1473
1474         process_private = (struct pmd_process_private *)
1475                 rte_zmalloc(name, sizeof(struct pmd_process_private),
1476                             RTE_CACHE_LINE_SIZE);
1477
1478         if (process_private == NULL) {
1479                 MIF_LOG(ERR, "Failed to alloc memory for process private");
1480                 return -1;
1481         }
1482         eth_dev->process_private = process_private;
1483
1484         pmd = eth_dev->data->dev_private;
1485         memset(pmd, 0, sizeof(*pmd));
1486
1487         pmd->id = id;
1488         pmd->flags = flags;
1489         pmd->flags |= ETH_MEMIF_FLAG_DISABLED;
1490         pmd->role = role;
1491         /* Zero-copy flag irelevant to master. */
1492         if (pmd->role == MEMIF_ROLE_MASTER)
1493                 pmd->flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
1494
1495         ret = memif_socket_init(eth_dev, socket_filename);
1496         if (ret < 0)
1497                 return ret;
1498
1499         memset(pmd->secret, 0, sizeof(char) * ETH_MEMIF_SECRET_SIZE);
1500         if (secret != NULL)
1501                 strlcpy(pmd->secret, secret, sizeof(pmd->secret));
1502
1503         pmd->cfg.log2_ring_size = log2_ring_size;
1504         /* set in .dev_configure() */
1505         pmd->cfg.num_s2m_rings = 0;
1506         pmd->cfg.num_m2s_rings = 0;
1507
1508         pmd->cfg.pkt_buffer_size = pkt_buffer_size;
1509         rte_spinlock_init(&pmd->cc_lock);
1510
1511         data = eth_dev->data;
1512         data->dev_private = pmd;
1513         data->numa_node = numa_node;
1514         data->dev_link = pmd_link;
1515         data->mac_addrs = ether_addr;
1516         data->promiscuous = 1;
1517
1518         eth_dev->dev_ops = &ops;
1519         eth_dev->device = &vdev->device;
1520         if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1521                 eth_dev->rx_pkt_burst = eth_memif_rx_zc;
1522                 eth_dev->tx_pkt_burst = eth_memif_tx_zc;
1523         } else {
1524                 eth_dev->rx_pkt_burst = eth_memif_rx;
1525                 eth_dev->tx_pkt_burst = eth_memif_tx;
1526         }
1527
1528
1529         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1530
1531         rte_eth_dev_probing_finish(eth_dev);
1532
1533         return 0;
1534 }
1535
1536 static int
1537 memif_set_role(const char *key __rte_unused, const char *value,
1538                void *extra_args)
1539 {
1540         enum memif_role_t *role = (enum memif_role_t *)extra_args;
1541
1542         if (strstr(value, "master") != NULL) {
1543                 *role = MEMIF_ROLE_MASTER;
1544         } else if (strstr(value, "slave") != NULL) {
1545                 *role = MEMIF_ROLE_SLAVE;
1546         } else {
1547                 MIF_LOG(ERR, "Unknown role: %s.", value);
1548                 return -EINVAL;
1549         }
1550         return 0;
1551 }
1552
1553 static int
1554 memif_set_zc(const char *key __rte_unused, const char *value, void *extra_args)
1555 {
1556         uint32_t *flags = (uint32_t *)extra_args;
1557
1558         if (strstr(value, "yes") != NULL) {
1559                 if (!rte_mcfg_get_single_file_segments()) {
1560                         MIF_LOG(ERR, "Zero-copy doesn't support multi-file segments.");
1561                         return -ENOTSUP;
1562                 }
1563                 *flags |= ETH_MEMIF_FLAG_ZERO_COPY;
1564         } else if (strstr(value, "no") != NULL) {
1565                 *flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
1566         } else {
1567                 MIF_LOG(ERR, "Failed to parse zero-copy param: %s.", value);
1568                 return -EINVAL;
1569         }
1570         return 0;
1571 }
1572
1573 static int
1574 memif_set_id(const char *key __rte_unused, const char *value, void *extra_args)
1575 {
1576         memif_interface_id_t *id = (memif_interface_id_t *)extra_args;
1577
1578         /* even if parsing fails, 0 is a valid id */
1579         *id = strtoul(value, NULL, 10);
1580         return 0;
1581 }
1582
1583 static int
1584 memif_set_bs(const char *key __rte_unused, const char *value, void *extra_args)
1585 {
1586         unsigned long tmp;
1587         uint16_t *pkt_buffer_size = (uint16_t *)extra_args;
1588
1589         tmp = strtoul(value, NULL, 10);
1590         if (tmp == 0 || tmp > 0xFFFF) {
1591                 MIF_LOG(ERR, "Invalid buffer size: %s.", value);
1592                 return -EINVAL;
1593         }
1594         *pkt_buffer_size = tmp;
1595         return 0;
1596 }
1597
1598 static int
1599 memif_set_rs(const char *key __rte_unused, const char *value, void *extra_args)
1600 {
1601         unsigned long tmp;
1602         memif_log2_ring_size_t *log2_ring_size =
1603             (memif_log2_ring_size_t *)extra_args;
1604
1605         tmp = strtoul(value, NULL, 10);
1606         if (tmp == 0 || tmp > ETH_MEMIF_MAX_LOG2_RING_SIZE) {
1607                 MIF_LOG(ERR, "Invalid ring size: %s (max %u).",
1608                         value, ETH_MEMIF_MAX_LOG2_RING_SIZE);
1609                 return -EINVAL;
1610         }
1611         *log2_ring_size = tmp;
1612         return 0;
1613 }
1614
1615 /* check if directory exists and if we have permission to read/write */
1616 static int
1617 memif_check_socket_filename(const char *filename)
1618 {
1619         char *dir = NULL, *tmp;
1620         uint32_t idx;
1621         int ret = 0;
1622
1623         if (strlen(filename) >= MEMIF_SOCKET_UN_SIZE) {
1624                 MIF_LOG(ERR, "Unix socket address too long (max 108).");
1625                 return -1;
1626         }
1627
1628         tmp = strrchr(filename, '/');
1629         if (tmp != NULL) {
1630                 idx = tmp - filename;
1631                 dir = rte_zmalloc("memif_tmp", sizeof(char) * (idx + 1), 0);
1632                 if (dir == NULL) {
1633                         MIF_LOG(ERR, "Failed to allocate memory.");
1634                         return -1;
1635                 }
1636                 strlcpy(dir, filename, sizeof(char) * (idx + 1));
1637         }
1638
1639         if (dir == NULL || (faccessat(-1, dir, F_OK | R_OK |
1640                                         W_OK, AT_EACCESS) < 0)) {
1641                 MIF_LOG(ERR, "Invalid socket directory.");
1642                 ret = -EINVAL;
1643         }
1644
1645         if (dir != NULL)
1646                 rte_free(dir);
1647
1648         return ret;
1649 }
1650
1651 static int
1652 memif_set_socket_filename(const char *key __rte_unused, const char *value,
1653                           void *extra_args)
1654 {
1655         const char **socket_filename = (const char **)extra_args;
1656
1657         *socket_filename = value;
1658         return memif_check_socket_filename(*socket_filename);
1659 }
1660
1661 static int
1662 memif_set_mac(const char *key __rte_unused, const char *value, void *extra_args)
1663 {
1664         struct rte_ether_addr *ether_addr = (struct rte_ether_addr *)extra_args;
1665
1666         if (rte_ether_unformat_addr(value, ether_addr) < 0)
1667                 MIF_LOG(WARNING, "Failed to parse mac '%s'.", value);
1668         return 0;
1669 }
1670
1671 static int
1672 memif_set_secret(const char *key __rte_unused, const char *value, void *extra_args)
1673 {
1674         const char **secret = (const char **)extra_args;
1675
1676         *secret = value;
1677         return 0;
1678 }
1679
1680 static int
1681 rte_pmd_memif_probe(struct rte_vdev_device *vdev)
1682 {
1683         RTE_BUILD_BUG_ON(sizeof(memif_msg_t) != 128);
1684         RTE_BUILD_BUG_ON(sizeof(memif_desc_t) != 16);
1685         int ret = 0;
1686         struct rte_kvargs *kvlist;
1687         const char *name = rte_vdev_device_name(vdev);
1688         enum memif_role_t role = MEMIF_ROLE_SLAVE;
1689         memif_interface_id_t id = 0;
1690         uint16_t pkt_buffer_size = ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE;
1691         memif_log2_ring_size_t log2_ring_size = ETH_MEMIF_DEFAULT_RING_SIZE;
1692         const char *socket_filename = ETH_MEMIF_DEFAULT_SOCKET_FILENAME;
1693         uint32_t flags = 0;
1694         const char *secret = NULL;
1695         struct rte_ether_addr *ether_addr = rte_zmalloc("",
1696                 sizeof(struct rte_ether_addr), 0);
1697         struct rte_eth_dev *eth_dev;
1698
1699         rte_eth_random_addr(ether_addr->addr_bytes);
1700
1701         MIF_LOG(INFO, "Initialize MEMIF: %s.", name);
1702
1703         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1704                 eth_dev = rte_eth_dev_attach_secondary(name);
1705                 if (!eth_dev) {
1706                         MIF_LOG(ERR, "Failed to probe %s", name);
1707                         return -1;
1708                 }
1709
1710                 eth_dev->dev_ops = &ops;
1711                 eth_dev->device = &vdev->device;
1712                 eth_dev->rx_pkt_burst = eth_memif_rx;
1713                 eth_dev->tx_pkt_burst = eth_memif_tx;
1714
1715                 if (!rte_eal_primary_proc_alive(NULL)) {
1716                         MIF_LOG(ERR, "Primary process is missing");
1717                         return -1;
1718                 }
1719
1720                 eth_dev->process_private = (struct pmd_process_private *)
1721                         rte_zmalloc(name,
1722                                 sizeof(struct pmd_process_private),
1723                                 RTE_CACHE_LINE_SIZE);
1724                 if (eth_dev->process_private == NULL) {
1725                         MIF_LOG(ERR,
1726                                 "Failed to alloc memory for process private");
1727                         return -1;
1728                 }
1729
1730                 rte_eth_dev_probing_finish(eth_dev);
1731
1732                 return 0;
1733         }
1734
1735         ret = rte_mp_action_register(MEMIF_MP_SEND_REGION, memif_mp_send_region);
1736         /*
1737          * Primary process can continue probing, but secondary process won't
1738          * be able to get memory regions information
1739          */
1740         if (ret < 0 && rte_errno != EEXIST)
1741                 MIF_LOG(WARNING, "Failed to register mp action callback: %s",
1742                         strerror(rte_errno));
1743
1744         kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_arguments);
1745
1746         /* parse parameters */
1747         if (kvlist != NULL) {
1748                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ROLE_ARG,
1749                                          &memif_set_role, &role);
1750                 if (ret < 0)
1751                         goto exit;
1752                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ID_ARG,
1753                                          &memif_set_id, &id);
1754                 if (ret < 0)
1755                         goto exit;
1756                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
1757                                          &memif_set_bs, &pkt_buffer_size);
1758                 if (ret < 0)
1759                         goto exit;
1760                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_RING_SIZE_ARG,
1761                                          &memif_set_rs, &log2_ring_size);
1762                 if (ret < 0)
1763                         goto exit;
1764                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ARG,
1765                                          &memif_set_socket_filename,
1766                                          (void *)(&socket_filename));
1767                 if (ret < 0)
1768                         goto exit;
1769                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG,
1770                                          &memif_set_mac, ether_addr);
1771                 if (ret < 0)
1772                         goto exit;
1773                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ZC_ARG,
1774                                          &memif_set_zc, &flags);
1775                 if (ret < 0)
1776                         goto exit;
1777                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SECRET_ARG,
1778                                          &memif_set_secret, (void *)(&secret));
1779                 if (ret < 0)
1780                         goto exit;
1781         }
1782
1783         /* create interface */
1784         ret = memif_create(vdev, role, id, flags, socket_filename,
1785                            log2_ring_size, pkt_buffer_size, secret, ether_addr);
1786
1787 exit:
1788         if (kvlist != NULL)
1789                 rte_kvargs_free(kvlist);
1790         return ret;
1791 }
1792
1793 static int
1794 rte_pmd_memif_remove(struct rte_vdev_device *vdev)
1795 {
1796         struct rte_eth_dev *eth_dev;
1797
1798         eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(vdev));
1799         if (eth_dev == NULL)
1800                 return 0;
1801
1802         rte_eth_dev_close(eth_dev->data->port_id);
1803
1804         return 0;
1805 }
1806
1807 static struct rte_vdev_driver pmd_memif_drv = {
1808         .probe = rte_pmd_memif_probe,
1809         .remove = rte_pmd_memif_remove,
1810 };
1811
1812 RTE_PMD_REGISTER_VDEV(net_memif, pmd_memif_drv);
1813
1814 RTE_PMD_REGISTER_PARAM_STRING(net_memif,
1815                               ETH_MEMIF_ID_ARG "=<int>"
1816                               ETH_MEMIF_ROLE_ARG "=master|slave"
1817                               ETH_MEMIF_PKT_BUFFER_SIZE_ARG "=<int>"
1818                               ETH_MEMIF_RING_SIZE_ARG "=<int>"
1819                               ETH_MEMIF_SOCKET_ARG "=<string>"
1820                               ETH_MEMIF_MAC_ARG "=xx:xx:xx:xx:xx:xx"
1821                               ETH_MEMIF_ZC_ARG "=yes|no"
1822                               ETH_MEMIF_SECRET_ARG "=<string>");
1823
1824 RTE_LOG_REGISTER(memif_logtype, pmd.net.memif, NOTICE);