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 <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_stop(struct rte_eth_dev *dev)
1265 {
1266         memif_disconnect(dev);
1267         return 0;
1268 }
1269
1270 static int
1271 memif_dev_close(struct rte_eth_dev *dev)
1272 {
1273         struct pmd_internals *pmd = dev->data->dev_private;
1274         int i;
1275
1276         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1277                 memif_msg_enq_disconnect(pmd->cc, "Device closed", 0);
1278
1279                 for (i = 0; i < dev->data->nb_rx_queues; i++)
1280                         (*dev->dev_ops->rx_queue_release)(dev, i);
1281                 for (i = 0; i < dev->data->nb_tx_queues; i++)
1282                         (*dev->dev_ops->tx_queue_release)(dev, i);
1283
1284                 memif_socket_remove_device(dev);
1285         }
1286
1287         rte_free(dev->process_private);
1288
1289         return 0;
1290 }
1291
1292 static int
1293 memif_dev_configure(struct rte_eth_dev *dev)
1294 {
1295         struct pmd_internals *pmd = dev->data->dev_private;
1296
1297         /*
1298          * CLIENT - TXQ
1299          * SERVER - RXQ
1300          */
1301         pmd->cfg.num_c2s_rings = (pmd->role == MEMIF_ROLE_CLIENT) ?
1302                                   dev->data->nb_tx_queues : dev->data->nb_rx_queues;
1303
1304         /*
1305          * CLIENT - RXQ
1306          * SERVER - TXQ
1307          */
1308         pmd->cfg.num_s2c_rings = (pmd->role == MEMIF_ROLE_CLIENT) ?
1309                                   dev->data->nb_rx_queues : dev->data->nb_tx_queues;
1310
1311         return 0;
1312 }
1313
1314 static int
1315 memif_tx_queue_setup(struct rte_eth_dev *dev,
1316                      uint16_t qid,
1317                      uint16_t nb_tx_desc __rte_unused,
1318                      unsigned int socket_id __rte_unused,
1319                      const struct rte_eth_txconf *tx_conf __rte_unused)
1320 {
1321         struct pmd_internals *pmd = dev->data->dev_private;
1322         struct memif_queue *mq;
1323
1324         mq = rte_zmalloc("tx-queue", sizeof(struct memif_queue), 0);
1325         if (mq == NULL) {
1326                 MIF_LOG(ERR, "Failed to allocate tx queue id: %u", qid);
1327                 return -ENOMEM;
1328         }
1329
1330         /* Allocate interrupt instance */
1331         mq->intr_handle = rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED);
1332         if (mq->intr_handle == NULL) {
1333                 MIF_LOG(ERR, "Failed to allocate intr handle");
1334                 return -ENOMEM;
1335         }
1336
1337         mq->type =
1338             (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_C2S : MEMIF_RING_S2C;
1339         mq->n_pkts = 0;
1340         mq->n_bytes = 0;
1341
1342         if (rte_intr_fd_set(mq->intr_handle, -1))
1343                 return -rte_errno;
1344
1345         if (rte_intr_type_set(mq->intr_handle, RTE_INTR_HANDLE_EXT))
1346                 return -rte_errno;
1347
1348         mq->in_port = dev->data->port_id;
1349         dev->data->tx_queues[qid] = mq;
1350
1351         return 0;
1352 }
1353
1354 static int
1355 memif_rx_queue_setup(struct rte_eth_dev *dev,
1356                      uint16_t qid,
1357                      uint16_t nb_rx_desc __rte_unused,
1358                      unsigned int socket_id __rte_unused,
1359                      const struct rte_eth_rxconf *rx_conf __rte_unused,
1360                      struct rte_mempool *mb_pool)
1361 {
1362         struct pmd_internals *pmd = dev->data->dev_private;
1363         struct memif_queue *mq;
1364
1365         mq = rte_zmalloc("rx-queue", sizeof(struct memif_queue), 0);
1366         if (mq == NULL) {
1367                 MIF_LOG(ERR, "Failed to allocate rx queue id: %u", qid);
1368                 return -ENOMEM;
1369         }
1370
1371         /* Allocate interrupt instance */
1372         mq->intr_handle = rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_SHARED);
1373         if (mq->intr_handle == NULL) {
1374                 MIF_LOG(ERR, "Failed to allocate intr handle");
1375                 return -ENOMEM;
1376         }
1377
1378         mq->type = (pmd->role == MEMIF_ROLE_CLIENT) ? MEMIF_RING_S2C : MEMIF_RING_C2S;
1379         mq->n_pkts = 0;
1380         mq->n_bytes = 0;
1381
1382         if (rte_intr_fd_set(mq->intr_handle, -1))
1383                 return -rte_errno;
1384
1385         if (rte_intr_type_set(mq->intr_handle, RTE_INTR_HANDLE_EXT))
1386                 return -rte_errno;
1387
1388         mq->mempool = mb_pool;
1389         mq->in_port = dev->data->port_id;
1390         dev->data->rx_queues[qid] = mq;
1391
1392         return 0;
1393 }
1394
1395 static void
1396 memif_rx_queue_release(struct rte_eth_dev *dev, uint16_t qid)
1397 {
1398         struct memif_queue *mq = dev->data->rx_queues[qid];
1399
1400         if (!mq)
1401                 return;
1402
1403         rte_intr_instance_free(mq->intr_handle);
1404         rte_free(mq);
1405 }
1406
1407 static void
1408 memif_tx_queue_release(struct rte_eth_dev *dev, uint16_t qid)
1409 {
1410         struct memif_queue *mq = dev->data->tx_queues[qid];
1411
1412         if (!mq)
1413                 return;
1414
1415         rte_free(mq);
1416 }
1417
1418 static int
1419 memif_link_update(struct rte_eth_dev *dev,
1420                   int wait_to_complete __rte_unused)
1421 {
1422         struct pmd_process_private *proc_private;
1423
1424         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1425                 proc_private = dev->process_private;
1426                 if (dev->data->dev_link.link_status == RTE_ETH_LINK_UP &&
1427                                 proc_private->regions_num == 0) {
1428                         memif_mp_request_regions(dev);
1429                 } else if (dev->data->dev_link.link_status == RTE_ETH_LINK_DOWN &&
1430                                 proc_private->regions_num > 0) {
1431                         memif_free_regions(dev);
1432                 }
1433         }
1434         return 0;
1435 }
1436
1437 static int
1438 memif_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1439 {
1440         struct pmd_internals *pmd = dev->data->dev_private;
1441         struct memif_queue *mq;
1442         int i;
1443         uint8_t tmp, nq;
1444
1445         stats->ipackets = 0;
1446         stats->ibytes = 0;
1447         stats->opackets = 0;
1448         stats->obytes = 0;
1449
1450         tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_c2s_rings :
1451             pmd->run.num_s2c_rings;
1452         nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
1453             RTE_ETHDEV_QUEUE_STAT_CNTRS;
1454
1455         /* RX stats */
1456         for (i = 0; i < nq; i++) {
1457                 mq = dev->data->rx_queues[i];
1458                 stats->q_ipackets[i] = mq->n_pkts;
1459                 stats->q_ibytes[i] = mq->n_bytes;
1460                 stats->ipackets += mq->n_pkts;
1461                 stats->ibytes += mq->n_bytes;
1462         }
1463
1464         tmp = (pmd->role == MEMIF_ROLE_CLIENT) ? pmd->run.num_s2c_rings :
1465             pmd->run.num_c2s_rings;
1466         nq = (tmp < RTE_ETHDEV_QUEUE_STAT_CNTRS) ? tmp :
1467             RTE_ETHDEV_QUEUE_STAT_CNTRS;
1468
1469         /* TX stats */
1470         for (i = 0; i < nq; i++) {
1471                 mq = dev->data->tx_queues[i];
1472                 stats->q_opackets[i] = mq->n_pkts;
1473                 stats->q_obytes[i] = mq->n_bytes;
1474                 stats->opackets += mq->n_pkts;
1475                 stats->obytes += mq->n_bytes;
1476         }
1477         return 0;
1478 }
1479
1480 static int
1481 memif_stats_reset(struct rte_eth_dev *dev)
1482 {
1483         struct pmd_internals *pmd = dev->data->dev_private;
1484         int i;
1485         struct memif_queue *mq;
1486
1487         for (i = 0; i < pmd->run.num_c2s_rings; i++) {
1488                 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->tx_queues[i] :
1489                     dev->data->rx_queues[i];
1490                 mq->n_pkts = 0;
1491                 mq->n_bytes = 0;
1492         }
1493         for (i = 0; i < pmd->run.num_s2c_rings; i++) {
1494                 mq = (pmd->role == MEMIF_ROLE_CLIENT) ? dev->data->rx_queues[i] :
1495                     dev->data->tx_queues[i];
1496                 mq->n_pkts = 0;
1497                 mq->n_bytes = 0;
1498         }
1499
1500         return 0;
1501 }
1502
1503 static int
1504 memif_rx_queue_intr_enable(struct rte_eth_dev *dev __rte_unused,
1505                            uint16_t qid __rte_unused)
1506 {
1507         MIF_LOG(WARNING, "Interrupt mode not supported.");
1508
1509         return -1;
1510 }
1511
1512 static int
1513 memif_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t qid __rte_unused)
1514 {
1515         struct pmd_internals *pmd __rte_unused = dev->data->dev_private;
1516
1517         return 0;
1518 }
1519
1520 static const struct eth_dev_ops ops = {
1521         .dev_start = memif_dev_start,
1522         .dev_stop = memif_dev_stop,
1523         .dev_close = memif_dev_close,
1524         .dev_infos_get = memif_dev_info,
1525         .dev_configure = memif_dev_configure,
1526         .tx_queue_setup = memif_tx_queue_setup,
1527         .rx_queue_setup = memif_rx_queue_setup,
1528         .rx_queue_release = memif_rx_queue_release,
1529         .tx_queue_release = memif_tx_queue_release,
1530         .rx_queue_intr_enable = memif_rx_queue_intr_enable,
1531         .rx_queue_intr_disable = memif_rx_queue_intr_disable,
1532         .link_update = memif_link_update,
1533         .stats_get = memif_stats_get,
1534         .stats_reset = memif_stats_reset,
1535 };
1536
1537 static int
1538 memif_create(struct rte_vdev_device *vdev, enum memif_role_t role,
1539              memif_interface_id_t id, uint32_t flags,
1540              const char *socket_filename,
1541              memif_log2_ring_size_t log2_ring_size,
1542              uint16_t pkt_buffer_size, const char *secret,
1543              struct rte_ether_addr *ether_addr)
1544 {
1545         int ret = 0;
1546         struct rte_eth_dev *eth_dev;
1547         struct rte_eth_dev_data *data;
1548         struct pmd_internals *pmd;
1549         struct pmd_process_private *process_private;
1550         const unsigned int numa_node = vdev->device.numa_node;
1551         const char *name = rte_vdev_device_name(vdev);
1552
1553         eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1554         if (eth_dev == NULL) {
1555                 MIF_LOG(ERR, "%s: Unable to allocate device struct.", name);
1556                 return -1;
1557         }
1558
1559         process_private = (struct pmd_process_private *)
1560                 rte_zmalloc(name, sizeof(struct pmd_process_private),
1561                             RTE_CACHE_LINE_SIZE);
1562
1563         if (process_private == NULL) {
1564                 MIF_LOG(ERR, "Failed to alloc memory for process private");
1565                 return -1;
1566         }
1567         eth_dev->process_private = process_private;
1568
1569         pmd = eth_dev->data->dev_private;
1570         memset(pmd, 0, sizeof(*pmd));
1571
1572         pmd->id = id;
1573         pmd->flags = flags;
1574         pmd->flags |= ETH_MEMIF_FLAG_DISABLED;
1575         pmd->role = role;
1576         /* Zero-copy flag irelevant to server. */
1577         if (pmd->role == MEMIF_ROLE_SERVER)
1578                 pmd->flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
1579
1580         ret = memif_socket_init(eth_dev, socket_filename);
1581         if (ret < 0)
1582                 return ret;
1583
1584         memset(pmd->secret, 0, sizeof(char) * ETH_MEMIF_SECRET_SIZE);
1585         if (secret != NULL)
1586                 strlcpy(pmd->secret, secret, sizeof(pmd->secret));
1587
1588         pmd->cfg.log2_ring_size = log2_ring_size;
1589         /* set in .dev_configure() */
1590         pmd->cfg.num_c2s_rings = 0;
1591         pmd->cfg.num_s2c_rings = 0;
1592
1593         pmd->cfg.pkt_buffer_size = pkt_buffer_size;
1594         rte_spinlock_init(&pmd->cc_lock);
1595
1596         data = eth_dev->data;
1597         data->dev_private = pmd;
1598         data->numa_node = numa_node;
1599         data->dev_link = pmd_link;
1600         data->mac_addrs = ether_addr;
1601         data->promiscuous = 1;
1602         data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1603
1604         eth_dev->dev_ops = &ops;
1605         eth_dev->device = &vdev->device;
1606         if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
1607                 eth_dev->rx_pkt_burst = eth_memif_rx_zc;
1608                 eth_dev->tx_pkt_burst = eth_memif_tx_zc;
1609         } else {
1610                 eth_dev->rx_pkt_burst = eth_memif_rx;
1611                 eth_dev->tx_pkt_burst = eth_memif_tx;
1612         }
1613
1614         rte_eth_dev_probing_finish(eth_dev);
1615
1616         return 0;
1617 }
1618
1619 static int
1620 memif_set_role(const char *key __rte_unused, const char *value,
1621                void *extra_args)
1622 {
1623         enum memif_role_t *role = (enum memif_role_t *)extra_args;
1624
1625         if (strstr(value, "server") != NULL) {
1626                 *role = MEMIF_ROLE_SERVER;
1627         } else if (strstr(value, "client") != NULL) {
1628                 *role = MEMIF_ROLE_CLIENT;
1629         } else if (strstr(value, "master") != NULL) {
1630                 MIF_LOG(NOTICE, "Role argument \"master\" is deprecated, use \"server\"");
1631                 *role = MEMIF_ROLE_SERVER;
1632         } else if (strstr(value, "slave") != NULL) {
1633                 MIF_LOG(NOTICE, "Role argument \"slave\" is deprecated, use \"client\"");
1634                 *role = MEMIF_ROLE_CLIENT;
1635         } else {
1636                 MIF_LOG(ERR, "Unknown role: %s.", value);
1637                 return -EINVAL;
1638         }
1639         return 0;
1640 }
1641
1642 static int
1643 memif_set_zc(const char *key __rte_unused, const char *value, void *extra_args)
1644 {
1645         uint32_t *flags = (uint32_t *)extra_args;
1646
1647         if (strstr(value, "yes") != NULL) {
1648                 if (!rte_mcfg_get_single_file_segments()) {
1649                         MIF_LOG(ERR, "Zero-copy doesn't support multi-file segments.");
1650                         return -ENOTSUP;
1651                 }
1652                 *flags |= ETH_MEMIF_FLAG_ZERO_COPY;
1653         } else if (strstr(value, "no") != NULL) {
1654                 *flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
1655         } else {
1656                 MIF_LOG(ERR, "Failed to parse zero-copy param: %s.", value);
1657                 return -EINVAL;
1658         }
1659         return 0;
1660 }
1661
1662 static int
1663 memif_set_id(const char *key __rte_unused, const char *value, void *extra_args)
1664 {
1665         memif_interface_id_t *id = (memif_interface_id_t *)extra_args;
1666
1667         /* even if parsing fails, 0 is a valid id */
1668         *id = strtoul(value, NULL, 10);
1669         return 0;
1670 }
1671
1672 static int
1673 memif_set_bs(const char *key __rte_unused, const char *value, void *extra_args)
1674 {
1675         unsigned long tmp;
1676         uint16_t *pkt_buffer_size = (uint16_t *)extra_args;
1677
1678         tmp = strtoul(value, NULL, 10);
1679         if (tmp == 0 || tmp > 0xFFFF) {
1680                 MIF_LOG(ERR, "Invalid buffer size: %s.", value);
1681                 return -EINVAL;
1682         }
1683         *pkt_buffer_size = tmp;
1684         return 0;
1685 }
1686
1687 static int
1688 memif_set_rs(const char *key __rte_unused, const char *value, void *extra_args)
1689 {
1690         unsigned long tmp;
1691         memif_log2_ring_size_t *log2_ring_size =
1692             (memif_log2_ring_size_t *)extra_args;
1693
1694         tmp = strtoul(value, NULL, 10);
1695         if (tmp == 0 || tmp > ETH_MEMIF_MAX_LOG2_RING_SIZE) {
1696                 MIF_LOG(ERR, "Invalid ring size: %s (max %u).",
1697                         value, ETH_MEMIF_MAX_LOG2_RING_SIZE);
1698                 return -EINVAL;
1699         }
1700         *log2_ring_size = tmp;
1701         return 0;
1702 }
1703
1704 /* check if directory exists and if we have permission to read/write */
1705 static int
1706 memif_check_socket_filename(const char *filename)
1707 {
1708         char *dir = NULL, *tmp;
1709         uint32_t idx;
1710         int ret = 0;
1711
1712         if (strlen(filename) >= MEMIF_SOCKET_UN_SIZE) {
1713                 MIF_LOG(ERR, "Unix socket address too long (max 108).");
1714                 return -1;
1715         }
1716
1717         tmp = strrchr(filename, '/');
1718         if (tmp != NULL) {
1719                 idx = tmp - filename;
1720                 dir = rte_zmalloc("memif_tmp", sizeof(char) * (idx + 1), 0);
1721                 if (dir == NULL) {
1722                         MIF_LOG(ERR, "Failed to allocate memory.");
1723                         return -1;
1724                 }
1725                 strlcpy(dir, filename, sizeof(char) * (idx + 1));
1726         }
1727
1728         if (dir == NULL || (faccessat(-1, dir, F_OK | R_OK |
1729                                         W_OK, AT_EACCESS) < 0)) {
1730                 MIF_LOG(ERR, "Invalid socket directory.");
1731                 ret = -EINVAL;
1732         }
1733
1734         if (dir != NULL)
1735                 rte_free(dir);
1736
1737         return ret;
1738 }
1739
1740 static int
1741 memif_set_socket_filename(const char *key __rte_unused, const char *value,
1742                           void *extra_args)
1743 {
1744         const char **socket_filename = (const char **)extra_args;
1745
1746         *socket_filename = value;
1747         return 0;
1748 }
1749
1750 static int
1751 memif_set_is_socket_abstract(const char *key __rte_unused, const char *value, void *extra_args)
1752 {
1753         uint32_t *flags = (uint32_t *)extra_args;
1754
1755         if (strstr(value, "yes") != NULL) {
1756                 *flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1757         } else if (strstr(value, "no") != NULL) {
1758                 *flags &= ~ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1759         } else {
1760                 MIF_LOG(ERR, "Failed to parse socket-abstract param: %s.", value);
1761                 return -EINVAL;
1762         }
1763         return 0;
1764 }
1765
1766 static int
1767 memif_set_mac(const char *key __rte_unused, const char *value, void *extra_args)
1768 {
1769         struct rte_ether_addr *ether_addr = (struct rte_ether_addr *)extra_args;
1770
1771         if (rte_ether_unformat_addr(value, ether_addr) < 0)
1772                 MIF_LOG(WARNING, "Failed to parse mac '%s'.", value);
1773         return 0;
1774 }
1775
1776 static int
1777 memif_set_secret(const char *key __rte_unused, const char *value, void *extra_args)
1778 {
1779         const char **secret = (const char **)extra_args;
1780
1781         *secret = value;
1782         return 0;
1783 }
1784
1785 static int
1786 rte_pmd_memif_probe(struct rte_vdev_device *vdev)
1787 {
1788         RTE_BUILD_BUG_ON(sizeof(memif_msg_t) != 128);
1789         RTE_BUILD_BUG_ON(sizeof(memif_desc_t) != 16);
1790         int ret = 0;
1791         struct rte_kvargs *kvlist;
1792         const char *name = rte_vdev_device_name(vdev);
1793         enum memif_role_t role = MEMIF_ROLE_CLIENT;
1794         memif_interface_id_t id = 0;
1795         uint16_t pkt_buffer_size = ETH_MEMIF_DEFAULT_PKT_BUFFER_SIZE;
1796         memif_log2_ring_size_t log2_ring_size = ETH_MEMIF_DEFAULT_RING_SIZE;
1797         const char *socket_filename = ETH_MEMIF_DEFAULT_SOCKET_FILENAME;
1798         uint32_t flags = 0;
1799         const char *secret = NULL;
1800         struct rte_ether_addr *ether_addr = rte_zmalloc("",
1801                 sizeof(struct rte_ether_addr), 0);
1802         struct rte_eth_dev *eth_dev;
1803
1804         rte_eth_random_addr(ether_addr->addr_bytes);
1805
1806         MIF_LOG(INFO, "Initialize MEMIF: %s.", name);
1807
1808         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1809                 eth_dev = rte_eth_dev_attach_secondary(name);
1810                 if (!eth_dev) {
1811                         MIF_LOG(ERR, "Failed to probe %s", name);
1812                         return -1;
1813                 }
1814
1815                 eth_dev->dev_ops = &ops;
1816                 eth_dev->device = &vdev->device;
1817                 eth_dev->rx_pkt_burst = eth_memif_rx;
1818                 eth_dev->tx_pkt_burst = eth_memif_tx;
1819
1820                 if (!rte_eal_primary_proc_alive(NULL)) {
1821                         MIF_LOG(ERR, "Primary process is missing");
1822                         return -1;
1823                 }
1824
1825                 eth_dev->process_private = (struct pmd_process_private *)
1826                         rte_zmalloc(name,
1827                                 sizeof(struct pmd_process_private),
1828                                 RTE_CACHE_LINE_SIZE);
1829                 if (eth_dev->process_private == NULL) {
1830                         MIF_LOG(ERR,
1831                                 "Failed to alloc memory for process private");
1832                         return -1;
1833                 }
1834
1835                 rte_eth_dev_probing_finish(eth_dev);
1836
1837                 return 0;
1838         }
1839
1840         ret = rte_mp_action_register(MEMIF_MP_SEND_REGION, memif_mp_send_region);
1841         /*
1842          * Primary process can continue probing, but secondary process won't
1843          * be able to get memory regions information
1844          */
1845         if (ret < 0 && rte_errno != EEXIST)
1846                 MIF_LOG(WARNING, "Failed to register mp action callback: %s",
1847                         strerror(rte_errno));
1848
1849         /* use abstract address by default */
1850         flags |= ETH_MEMIF_FLAG_SOCKET_ABSTRACT;
1851
1852         kvlist = rte_kvargs_parse(rte_vdev_device_args(vdev), valid_arguments);
1853
1854         /* parse parameters */
1855         if (kvlist != NULL) {
1856                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ROLE_ARG,
1857                                          &memif_set_role, &role);
1858                 if (ret < 0)
1859                         goto exit;
1860                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ID_ARG,
1861                                          &memif_set_id, &id);
1862                 if (ret < 0)
1863                         goto exit;
1864                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_PKT_BUFFER_SIZE_ARG,
1865                                          &memif_set_bs, &pkt_buffer_size);
1866                 if (ret < 0)
1867                         goto exit;
1868                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_RING_SIZE_ARG,
1869                                          &memif_set_rs, &log2_ring_size);
1870                 if (ret < 0)
1871                         goto exit;
1872                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ARG,
1873                                          &memif_set_socket_filename,
1874                                          (void *)(&socket_filename));
1875                 if (ret < 0)
1876                         goto exit;
1877                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SOCKET_ABSTRACT_ARG,
1878                                          &memif_set_is_socket_abstract, &flags);
1879                 if (ret < 0)
1880                         goto exit;
1881                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_MAC_ARG,
1882                                          &memif_set_mac, ether_addr);
1883                 if (ret < 0)
1884                         goto exit;
1885                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_ZC_ARG,
1886                                          &memif_set_zc, &flags);
1887                 if (ret < 0)
1888                         goto exit;
1889                 ret = rte_kvargs_process(kvlist, ETH_MEMIF_SECRET_ARG,
1890                                          &memif_set_secret, (void *)(&secret));
1891                 if (ret < 0)
1892                         goto exit;
1893         }
1894
1895         if (!(flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT)) {
1896                 ret = memif_check_socket_filename(socket_filename);
1897                 if (ret < 0)
1898                         goto exit;
1899         }
1900
1901         /* create interface */
1902         ret = memif_create(vdev, role, id, flags, socket_filename,
1903                            log2_ring_size, pkt_buffer_size, secret, ether_addr);
1904
1905 exit:
1906         if (kvlist != NULL)
1907                 rte_kvargs_free(kvlist);
1908         return ret;
1909 }
1910
1911 static int
1912 rte_pmd_memif_remove(struct rte_vdev_device *vdev)
1913 {
1914         struct rte_eth_dev *eth_dev;
1915
1916         eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(vdev));
1917         if (eth_dev == NULL)
1918                 return 0;
1919
1920         return rte_eth_dev_close(eth_dev->data->port_id);
1921 }
1922
1923 static struct rte_vdev_driver pmd_memif_drv = {
1924         .probe = rte_pmd_memif_probe,
1925         .remove = rte_pmd_memif_remove,
1926 };
1927
1928 RTE_PMD_REGISTER_VDEV(net_memif, pmd_memif_drv);
1929
1930 RTE_PMD_REGISTER_PARAM_STRING(net_memif,
1931                               ETH_MEMIF_ID_ARG "=<int>"
1932                               ETH_MEMIF_ROLE_ARG "=server|client"
1933                               ETH_MEMIF_PKT_BUFFER_SIZE_ARG "=<int>"
1934                               ETH_MEMIF_RING_SIZE_ARG "=<int>"
1935                               ETH_MEMIF_SOCKET_ARG "=<string>"
1936                                   ETH_MEMIF_SOCKET_ABSTRACT_ARG "=yes|no"
1937                               ETH_MEMIF_MAC_ARG "=xx:xx:xx:xx:xx:xx"
1938                               ETH_MEMIF_ZC_ARG "=yes|no"
1939                               ETH_MEMIF_SECRET_ARG "=<string>");
1940
1941 RTE_LOG_REGISTER_DEFAULT(memif_logtype, NOTICE);