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