drivers/net/virtio/virtio_user_ethdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <sys/types.h>
   7 #include <unistd.h>
   8 #include <fcntl.h>
   9 #include <sys/socket.h>
  10
  11 #include <rte_malloc.h>
  12 #include <rte_kvargs.h>
  13 #include <rte_ethdev_vdev.h>
  14 #include <rte_bus_vdev.h>
  15 #include <rte_alarm.h>
  16 #include <rte_cycles.h>
  17
  18 #include "virtio_ethdev.h"
  19 #include "virtio_logs.h"
  20 #include "virtio_pci.h"
  21 #include "virtqueue.h"
  22 #include "virtio_rxtx.h"
  23 #include "virtio_user/virtio_user_dev.h"
  24 #include "virtio_user/vhost.h"
  25
  26 #define virtio_user_get_dev(hw) \
  27         ((struct virtio_user_dev *)(hw)->virtio_user_dev)
  28
  29 static void
  30 virtio_user_reset_queues_packed(struct rte_eth_dev *dev)
  31 {
  32         struct virtio_hw *hw = dev->data->dev_private;
  33         struct virtnet_rx *rxvq;
  34         struct virtnet_tx *txvq;
  35         uint16_t i;
  36
  37         /* Add lock to avoid queue contention. */
  38         rte_spinlock_lock(&hw->state_lock);
  39         hw->started = 0;
  40
  41         /*
  42          * Waitting for datapath to complete before resetting queues.
  43          * 1 ms should be enough for the ongoing Tx/Rx function to finish.
  44          */
  45         rte_delay_ms(1);
  46
  47         /* Vring reset for each Tx queue and Rx queue. */
  48         for (i = 0; i < dev->data->nb_rx_queues; i++) {
  49                 rxvq = dev->data->rx_queues[i];
  50                 virtqueue_rxvq_reset_packed(rxvq->vq);
  51                 virtio_dev_rx_queue_setup_finish(dev, i);
  52         }
  53
  54         for (i = 0; i < dev->data->nb_tx_queues; i++) {
  55                 txvq = dev->data->tx_queues[i];
  56                 virtqueue_txvq_reset_packed(txvq->vq);
  57         }
  58
  59         hw->started = 1;
  60         rte_spinlock_unlock(&hw->state_lock);
  61 }
  62
  63
  64 static int
  65 virtio_user_server_reconnect(struct virtio_user_dev *dev)
  66 {
  67         int ret;
  68         int connectfd;
  69         struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
  70         struct virtio_hw *hw = eth_dev->data->dev_private;
  71         uint64_t protocol_features;
  72
  73         connectfd = accept(dev->listenfd, NULL, NULL);
  74         if (connectfd < 0)
  75                 return -1;
  76
  77         dev->vhostfd = connectfd;
  78         if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
  79                                    &dev->device_features) < 0) {
  80                 PMD_INIT_LOG(ERR, "get_features failed: %s",
  81                              strerror(errno));
  82                 return -1;
  83         }
  84
  85         if (dev->device_features &
  86                         (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) {
  87                 if (dev->ops->send_request(dev,
  88                                         VHOST_USER_GET_PROTOCOL_FEATURES,
  89                                         &protocol_features))
  90                         return -1;
  91
  92                 dev->protocol_features &= protocol_features;
  93
  94                 if (dev->ops->send_request(dev,
  95                                         VHOST_USER_SET_PROTOCOL_FEATURES,
  96                                         &dev->protocol_features))
  97                         return -1;
  98
  99                 if (!(dev->protocol_features &
 100                                 (1ULL << VHOST_USER_PROTOCOL_F_MQ)))
 101                         dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ);
 102         }
 103
 104         dev->device_features |= dev->frontend_features;
 105
 106         /* umask vhost-user unsupported features */
 107         dev->device_features &= ~(dev->unsupported_features);
 108
 109         dev->features &= dev->device_features;
 110
 111         /* For packed ring, resetting queues is required in reconnection. */
 112         if (vtpci_packed_queue(hw) &&
 113            (vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_DRIVER_OK)) {
 114                 PMD_INIT_LOG(NOTICE, "Packets on the fly will be dropped"
 115                                 " when packed ring reconnecting.");
 116                 virtio_user_reset_queues_packed(eth_dev);
 117         }
 118
 119         ret = virtio_user_start_device(dev);
 120         if (ret < 0)
 121                 return -1;
 122
 123         if (dev->queue_pairs > 1) {
 124                 ret = virtio_user_handle_mq(dev, dev->queue_pairs);
 125                 if (ret != 0) {
 126                         PMD_INIT_LOG(ERR, "Fails to enable multi-queue pairs!");
 127                         return -1;
 128                 }
 129         }
 130         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
 131                 if (rte_intr_disable(eth_dev->intr_handle) < 0) {
 132                         PMD_DRV_LOG(ERR, "interrupt disable failed");
 133                         return -1;
 134                 }
 135                 rte_intr_callback_unregister(eth_dev->intr_handle,
 136                                              virtio_interrupt_handler,
 137                                              eth_dev);
 138                 eth_dev->intr_handle->fd = connectfd;
 139                 rte_intr_callback_register(eth_dev->intr_handle,
 140                                            virtio_interrupt_handler, eth_dev);
 141
 142                 if (rte_intr_enable(eth_dev->intr_handle) < 0) {
 143                         PMD_DRV_LOG(ERR, "interrupt enable failed");
 144                         return -1;
 145                 }
 146         }
 147         PMD_INIT_LOG(NOTICE, "server mode virtio-user reconnection succeeds!");
 148         return 0;
 149 }
 150
 151 static void
 152 virtio_user_delayed_handler(void *param)
 153 {
 154         struct virtio_hw *hw = (struct virtio_hw *)param;
 155         struct rte_eth_dev *eth_dev = &rte_eth_devices[hw->port_id];
 156         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 157
 158         if (rte_intr_disable(eth_dev->intr_handle) < 0) {
 159                 PMD_DRV_LOG(ERR, "interrupt disable failed");
 160                 return;
 161         }
 162         rte_intr_callback_unregister(eth_dev->intr_handle,
 163                                      virtio_interrupt_handler, eth_dev);
 164         if (dev->is_server) {
 165                 if (dev->vhostfd >= 0) {
 166                         close(dev->vhostfd);
 167                         dev->vhostfd = -1;
 168                 }
 169                 eth_dev->intr_handle->fd = dev->listenfd;
 170                 rte_intr_callback_register(eth_dev->intr_handle,
 171                                            virtio_interrupt_handler, eth_dev);
 172                 if (rte_intr_enable(eth_dev->intr_handle) < 0) {
 173                         PMD_DRV_LOG(ERR, "interrupt enable failed");
 174                         return;
 175                 }
 176         }
 177 }
 178
 179 static void
 180 virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
 181                      void *dst, int length)
 182 {
 183         int i;
 184         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 185
 186         if (offset == offsetof(struct virtio_net_config, mac) &&
 187             length == RTE_ETHER_ADDR_LEN) {
 188                 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i)
 189                         ((uint8_t *)dst)[i] = dev->mac_addr[i];
 190                 return;
 191         }
 192
 193         if (offset == offsetof(struct virtio_net_config, status)) {
 194                 char buf[128];
 195
 196                 if (dev->vhostfd >= 0) {
 197                         int r;
 198                         int flags;
 199
 200                         flags = fcntl(dev->vhostfd, F_GETFL);
 201                         if (fcntl(dev->vhostfd, F_SETFL,
 202                                         flags | O_NONBLOCK) == -1) {
 203                                 PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag");
 204                                 return;
 205                         }
 206                         r = recv(dev->vhostfd, buf, 128, MSG_PEEK);
 207                         if (r == 0 || (r < 0 && errno != EAGAIN)) {
 208                                 dev->net_status &= (~VIRTIO_NET_S_LINK_UP);
 209                                 PMD_DRV_LOG(ERR, "virtio-user port %u is down",
 210                                             hw->port_id);
 211
 212                                 /* This function could be called in the process
 213                                  * of interrupt handling, callback cannot be
 214                                  * unregistered here, set an alarm to do it.
 215                                  */
 216                                 rte_eal_alarm_set(1,
 217                                                   virtio_user_delayed_handler,
 218                                                   (void *)hw);
 219                         } else {
 220                                 dev->net_status |= VIRTIO_NET_S_LINK_UP;
 221                         }
 222                         if (fcntl(dev->vhostfd, F_SETFL,
 223                                         flags & ~O_NONBLOCK) == -1) {
 224                                 PMD_DRV_LOG(ERR, "error clearing O_NONBLOCK flag");
 225                                 return;
 226                         }
 227                 } else if (dev->is_server) {
 228                         dev->net_status &= (~VIRTIO_NET_S_LINK_UP);
 229                         if (virtio_user_server_reconnect(dev) >= 0)
 230                                 dev->net_status |= VIRTIO_NET_S_LINK_UP;
 231                 }
 232
 233                 *(uint16_t *)dst = dev->net_status;
 234         }
 235
 236         if (offset == offsetof(struct virtio_net_config, max_virtqueue_pairs))
 237                 *(uint16_t *)dst = dev->max_queue_pairs;
 238 }
 239
 240 static void
 241 virtio_user_write_dev_config(struct virtio_hw *hw, size_t offset,
 242                       const void *src, int length)
 243 {
 244         int i;
 245         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 246
 247         if ((offset == offsetof(struct virtio_net_config, mac)) &&
 248             (length == RTE_ETHER_ADDR_LEN))
 249                 for (i = 0; i < RTE_ETHER_ADDR_LEN; ++i)
 250                         dev->mac_addr[i] = ((const uint8_t *)src)[i];
 251         else
 252                 PMD_DRV_LOG(ERR, "not supported offset=%zu, len=%d",
 253                             offset, length);
 254 }
 255
 256 static void
 257 virtio_user_reset(struct virtio_hw *hw)
 258 {
 259         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 260
 261         if (dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK)
 262                 virtio_user_stop_device(dev);
 263 }
 264
 265 static void
 266 virtio_user_set_status(struct virtio_hw *hw, uint8_t status)
 267 {
 268         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 269
 270         if (status & VIRTIO_CONFIG_STATUS_DRIVER_OK)
 271                 virtio_user_start_device(dev);
 272         else if (status == VIRTIO_CONFIG_STATUS_RESET)
 273                 virtio_user_reset(hw);
 274         dev->status = status;
 275         virtio_user_send_status_update(dev, status);
 276 }
 277
 278 static uint8_t
 279 virtio_user_get_status(struct virtio_hw *hw)
 280 {
 281         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 282
 283         return dev->status;
 284 }
 285
 286 static uint64_t
 287 virtio_user_get_features(struct virtio_hw *hw)
 288 {
 289         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 290
 291         /* unmask feature bits defined in vhost user protocol */
 292         return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES;
 293 }
 294
 295 static void
 296 virtio_user_set_features(struct virtio_hw *hw, uint64_t features)
 297 {
 298         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 299
 300         dev->features = features & dev->device_features;
 301 }
 302
 303 static uint8_t
 304 virtio_user_get_isr(struct virtio_hw *hw __rte_unused)
 305 {
 306         /* rxq interrupts and config interrupt are separated in virtio-user,
 307          * here we only report config change.
 308          */
 309         return VIRTIO_PCI_ISR_CONFIG;
 310 }
 311
 312 static uint16_t
 313 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused,
 314                     uint16_t vec __rte_unused)
 315 {
 316         return 0;
 317 }
 318
 319 static uint16_t
 320 virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused,
 321                           struct virtqueue *vq __rte_unused,
 322                           uint16_t vec)
 323 {
 324         /* pretend we have done that */
 325         return vec;
 326 }
 327
 328 /* This function is to get the queue size, aka, number of descs, of a specified
 329  * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the
 330  * max supported queues.
 331  */
 332 static uint16_t
 333 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused)
 334 {
 335         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 336
 337         /* Currently, each queue has same queue size */
 338         return dev->queue_size;
 339 }
 340
 341 static void
 342 virtio_user_setup_queue_packed(struct virtqueue *vq,
 343                                struct virtio_user_dev *dev)
 344 {
 345         uint16_t queue_idx = vq->vq_queue_index;
 346         struct vring_packed *vring;
 347         uint64_t desc_addr;
 348         uint64_t avail_addr;
 349         uint64_t used_addr;
 350         uint16_t i;
 351
 352         vring  = &dev->packed_vrings[queue_idx];
 353         desc_addr = (uintptr_t)vq->vq_ring_virt_mem;
 354         avail_addr = desc_addr + vq->vq_nentries *
 355                 sizeof(struct vring_packed_desc);
 356         used_addr = RTE_ALIGN_CEIL(avail_addr +
 357                            sizeof(struct vring_packed_desc_event),
 358                            VIRTIO_PCI_VRING_ALIGN);
 359         vring->num = vq->vq_nentries;
 360         vring->desc = (void *)(uintptr_t)desc_addr;
 361         vring->driver = (void *)(uintptr_t)avail_addr;
 362         vring->device = (void *)(uintptr_t)used_addr;
 363         dev->packed_queues[queue_idx].avail_wrap_counter = true;
 364         dev->packed_queues[queue_idx].used_wrap_counter = true;
 365
 366         for (i = 0; i < vring->num; i++)
 367                 vring->desc[i].flags = 0;
 368 }
 369
 370 static void
 371 virtio_user_setup_queue_split(struct virtqueue *vq, struct virtio_user_dev *dev)
 372 {
 373         uint16_t queue_idx = vq->vq_queue_index;
 374         uint64_t desc_addr, avail_addr, used_addr;
 375
 376         desc_addr = (uintptr_t)vq->vq_ring_virt_mem;
 377         avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
 378         used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
 379                                                          ring[vq->vq_nentries]),
 380                                    VIRTIO_PCI_VRING_ALIGN);
 381
 382         dev->vrings[queue_idx].num = vq->vq_nentries;
 383         dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr;
 384         dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr;
 385         dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr;
 386 }
 387
 388 static int
 389 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
 390 {
 391         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 392
 393         if (vtpci_packed_queue(hw))
 394                 virtio_user_setup_queue_packed(vq, dev);
 395         else
 396                 virtio_user_setup_queue_split(vq, dev);
 397
 398         return 0;
 399 }
 400
 401 static void
 402 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq)
 403 {
 404         /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU
 405          * correspondingly stops the ioeventfds, and reset the status of
 406          * the device.
 407          * For modern devices, set queue desc, avail, used in PCI bar to 0,
 408          * not see any more behavior in QEMU.
 409          *
 410          * Here we just care about what information to deliver to vhost-user
 411          * or vhost-kernel. So we just close ioeventfd for now.
 412          */
 413         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 414
 415         close(dev->callfds[vq->vq_queue_index]);
 416         close(dev->kickfds[vq->vq_queue_index]);
 417 }
 418
 419 static void
 420 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq)
 421 {
 422         uint64_t buf = 1;
 423         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 424
 425         if (hw->cvq && (hw->cvq->vq == vq)) {
 426                 if (vtpci_packed_queue(vq->hw))
 427                         virtio_user_handle_cq_packed(dev, vq->vq_queue_index);
 428                 else
 429                         virtio_user_handle_cq(dev, vq->vq_queue_index);
 430                 return;
 431         }
 432
 433         if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0)
 434                 PMD_DRV_LOG(ERR, "failed to kick backend: %s",
 435                             strerror(errno));
 436 }
 437
 438 const struct virtio_pci_ops virtio_user_ops = {
 439         .read_dev_cfg   = virtio_user_read_dev_config,
 440         .write_dev_cfg  = virtio_user_write_dev_config,
 441         .get_status     = virtio_user_get_status,
 442         .set_status     = virtio_user_set_status,
 443         .get_features   = virtio_user_get_features,
 444         .set_features   = virtio_user_set_features,
 445         .get_isr        = virtio_user_get_isr,
 446         .set_config_irq = virtio_user_set_config_irq,
 447         .set_queue_irq  = virtio_user_set_queue_irq,
 448         .get_queue_num  = virtio_user_get_queue_num,
 449         .setup_queue    = virtio_user_setup_queue,
 450         .del_queue      = virtio_user_del_queue,
 451         .notify_queue   = virtio_user_notify_queue,
 452 };
 453
 454 static const char *valid_args[] = {
 455 #define VIRTIO_USER_ARG_QUEUES_NUM     "queues"
 456         VIRTIO_USER_ARG_QUEUES_NUM,
 457 #define VIRTIO_USER_ARG_CQ_NUM         "cq"
 458         VIRTIO_USER_ARG_CQ_NUM,
 459 #define VIRTIO_USER_ARG_MAC            "mac"
 460         VIRTIO_USER_ARG_MAC,
 461 #define VIRTIO_USER_ARG_PATH           "path"
 462         VIRTIO_USER_ARG_PATH,
 463 #define VIRTIO_USER_ARG_QUEUE_SIZE     "queue_size"
 464         VIRTIO_USER_ARG_QUEUE_SIZE,
 465 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface"
 466         VIRTIO_USER_ARG_INTERFACE_NAME,
 467 #define VIRTIO_USER_ARG_SERVER_MODE    "server"
 468         VIRTIO_USER_ARG_SERVER_MODE,
 469 #define VIRTIO_USER_ARG_MRG_RXBUF      "mrg_rxbuf"
 470         VIRTIO_USER_ARG_MRG_RXBUF,
 471 #define VIRTIO_USER_ARG_IN_ORDER       "in_order"
 472         VIRTIO_USER_ARG_IN_ORDER,
 473 #define VIRTIO_USER_ARG_PACKED_VQ      "packed_vq"
 474         VIRTIO_USER_ARG_PACKED_VQ,
 475 #define VIRTIO_USER_ARG_SPEED          "speed"
 476         VIRTIO_USER_ARG_SPEED,
 477 #define VIRTIO_USER_ARG_VECTORIZED     "vectorized"
 478         VIRTIO_USER_ARG_VECTORIZED,
 479         NULL
 480 };
 481
 482 #define VIRTIO_USER_DEF_CQ_EN   0
 483 #define VIRTIO_USER_DEF_Q_NUM   1
 484 #define VIRTIO_USER_DEF_Q_SZ    256
 485 #define VIRTIO_USER_DEF_SERVER_MODE     0
 486
 487 static int
 488 get_string_arg(const char *key __rte_unused,
 489                const char *value, void *extra_args)
 490 {
 491         if (!value || !extra_args)
 492                 return -EINVAL;
 493
 494         *(char **)extra_args = strdup(value);
 495
 496         if (!*(char **)extra_args)
 497                 return -ENOMEM;
 498
 499         return 0;
 500 }
 501
 502 static int
 503 get_integer_arg(const char *key __rte_unused,
 504                 const char *value, void *extra_args)
 505 {
 506         uint64_t integer = 0;
 507         if (!value || !extra_args)
 508                 return -EINVAL;
 509         errno = 0;
 510         integer = strtoull(value, NULL, 0);
 511         /* extra_args keeps default value, it should be replaced
 512          * only in case of successful parsing of the 'value' arg
 513          */
 514         if (errno == 0)
 515                 *(uint64_t *)extra_args = integer;
 516         return -errno;
 517 }
 518
 519 static struct rte_eth_dev *
 520 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev)
 521 {
 522         struct rte_eth_dev *eth_dev;
 523         struct rte_eth_dev_data *data;
 524         struct virtio_hw *hw;
 525         struct virtio_user_dev *dev;
 526
 527         eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw));
 528         if (!eth_dev) {
 529                 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev");
 530                 return NULL;
 531         }
 532
 533         data = eth_dev->data;
 534         hw = eth_dev->data->dev_private;
 535
 536         dev = rte_zmalloc(NULL, sizeof(*dev), 0);
 537         if (!dev) {
 538                 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed");
 539                 rte_eth_dev_release_port(eth_dev);
 540                 return NULL;
 541         }
 542
 543         hw->port_id = data->port_id;
 544         dev->port_id = data->port_id;
 545         virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops;
 546         /*
 547          * MSIX is required to enable LSC (see virtio_init_device).
 548          * Here just pretend that we support msix.
 549          */
 550         hw->use_msix = 1;
 551         hw->modern   = 0;
 552         hw->use_vec_rx = 0;
 553         hw->use_vec_tx = 0;
 554         hw->use_inorder_rx = 0;
 555         hw->use_inorder_tx = 0;
 556         hw->virtio_user_dev = dev;
 557         return eth_dev;
 558 }
 559
 560 static void
 561 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev)
 562 {
 563         struct rte_eth_dev_data *data = eth_dev->data;
 564         struct virtio_hw *hw = data->dev_private;
 565
 566         rte_free(hw->virtio_user_dev);
 567         rte_eth_dev_release_port(eth_dev);
 568 }
 569
 570 /* Dev initialization routine. Invoked once for each virtio vdev at
 571  * EAL init time, see rte_bus_probe().
 572  * Returns 0 on success.
 573  */
 574 static int
 575 virtio_user_pmd_probe(struct rte_vdev_device *dev)
 576 {
 577         struct rte_kvargs *kvlist = NULL;
 578         struct rte_eth_dev *eth_dev;
 579         struct virtio_hw *hw;
 580         uint64_t queues = VIRTIO_USER_DEF_Q_NUM;
 581         uint64_t cq = VIRTIO_USER_DEF_CQ_EN;
 582         uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ;
 583         uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE;
 584         uint64_t mrg_rxbuf = 1;
 585         uint64_t in_order = 1;
 586         uint64_t packed_vq = 0;
 587         uint64_t vectorized = 0;
 588         char *path = NULL;
 589         char *ifname = NULL;
 590         char *mac_addr = NULL;
 591         int ret = -1;
 592
 593         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
 594                 const char *name = rte_vdev_device_name(dev);
 595                 eth_dev = rte_eth_dev_attach_secondary(name);
 596                 if (!eth_dev) {
 597                         PMD_INIT_LOG(ERR, "Failed to probe %s", name);
 598                         return -1;
 599                 }
 600
 601                 if (eth_virtio_dev_init(eth_dev) < 0) {
 602                         PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails");
 603                         rte_eth_dev_release_port(eth_dev);
 604                         return -1;
 605                 }
 606
 607                 eth_dev->dev_ops = &virtio_user_secondary_eth_dev_ops;
 608                 eth_dev->device = &dev->device;
 609                 rte_eth_dev_probing_finish(eth_dev);
 610                 return 0;
 611         }
 612
 613         kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args);
 614         if (!kvlist) {
 615                 PMD_INIT_LOG(ERR, "error when parsing param");
 616                 goto end;
 617         }
 618
 619         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) {
 620                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH,
 621                                        &get_string_arg, &path) < 0) {
 622                         PMD_INIT_LOG(ERR, "error to parse %s",
 623                                      VIRTIO_USER_ARG_PATH);
 624                         goto end;
 625                 }
 626         } else {
 627                 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user",
 628                              VIRTIO_USER_ARG_PATH);
 629                 goto end;
 630         }
 631
 632         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) {
 633                 if (is_vhost_user_by_type(path)) {
 634                         PMD_INIT_LOG(ERR,
 635                                 "arg %s applies only to vhost-kernel backend",
 636                                 VIRTIO_USER_ARG_INTERFACE_NAME);
 637                         goto end;
 638                 }
 639
 640                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME,
 641                                        &get_string_arg, &ifname) < 0) {
 642                         PMD_INIT_LOG(ERR, "error to parse %s",
 643                                      VIRTIO_USER_ARG_INTERFACE_NAME);
 644                         goto end;
 645                 }
 646         }
 647
 648         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) {
 649                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC,
 650                                        &get_string_arg, &mac_addr) < 0) {
 651                         PMD_INIT_LOG(ERR, "error to parse %s",
 652                                      VIRTIO_USER_ARG_MAC);
 653                         goto end;
 654                 }
 655         }
 656
 657         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) {
 658                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE,
 659                                        &get_integer_arg, &queue_size) < 0) {
 660                         PMD_INIT_LOG(ERR, "error to parse %s",
 661                                      VIRTIO_USER_ARG_QUEUE_SIZE);
 662                         goto end;
 663                 }
 664         }
 665
 666         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) {
 667                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM,
 668                                        &get_integer_arg, &queues) < 0) {
 669                         PMD_INIT_LOG(ERR, "error to parse %s",
 670                                      VIRTIO_USER_ARG_QUEUES_NUM);
 671                         goto end;
 672                 }
 673         }
 674
 675         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) {
 676                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE,
 677                                        &get_integer_arg, &server_mode) < 0) {
 678                         PMD_INIT_LOG(ERR, "error to parse %s",
 679                                      VIRTIO_USER_ARG_SERVER_MODE);
 680                         goto end;
 681                 }
 682         }
 683
 684         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) {
 685                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM,
 686                                        &get_integer_arg, &cq) < 0) {
 687                         PMD_INIT_LOG(ERR, "error to parse %s",
 688                                      VIRTIO_USER_ARG_CQ_NUM);
 689                         goto end;
 690                 }
 691         } else if (queues > 1) {
 692                 cq = 1;
 693         }
 694
 695         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) {
 696                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ,
 697                                        &get_integer_arg, &packed_vq) < 0) {
 698                         PMD_INIT_LOG(ERR, "error to parse %s",
 699                                      VIRTIO_USER_ARG_PACKED_VQ);
 700                         goto end;
 701                 }
 702         }
 703
 704         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_VECTORIZED) == 1) {
 705                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_VECTORIZED,
 706                                        &get_integer_arg, &vectorized) < 0) {
 707                         PMD_INIT_LOG(ERR, "error to parse %s",
 708                                      VIRTIO_USER_ARG_VECTORIZED);
 709                         goto end;
 710                 }
 711         }
 712
 713         if (queues > 1 && cq == 0) {
 714                 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q");
 715                 goto end;
 716         }
 717
 718         if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) {
 719                 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u",
 720                         VIRTIO_USER_ARG_QUEUES_NUM, queues,
 721                         VIRTIO_MAX_VIRTQUEUE_PAIRS);
 722                 goto end;
 723         }
 724
 725         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) {
 726                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF,
 727                                        &get_integer_arg, &mrg_rxbuf) < 0) {
 728                         PMD_INIT_LOG(ERR, "error to parse %s",
 729                                      VIRTIO_USER_ARG_MRG_RXBUF);
 730                         goto end;
 731                 }
 732         }
 733
 734         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) {
 735                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER,
 736                                        &get_integer_arg, &in_order) < 0) {
 737                         PMD_INIT_LOG(ERR, "error to parse %s",
 738                                      VIRTIO_USER_ARG_IN_ORDER);
 739                         goto end;
 740                 }
 741         }
 742
 743         eth_dev = virtio_user_eth_dev_alloc(dev);
 744         if (!eth_dev) {
 745                 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device");
 746                 goto end;
 747         }
 748
 749         hw = eth_dev->data->dev_private;
 750         if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq,
 751                          queue_size, mac_addr, &ifname, server_mode,
 752                          mrg_rxbuf, in_order, packed_vq) < 0) {
 753                 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails");
 754                 virtio_user_eth_dev_free(eth_dev);
 755                 goto end;
 756         }
 757
 758         /* previously called by pci probing for physical dev */
 759         if (eth_virtio_dev_init(eth_dev) < 0) {
 760                 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails");
 761                 virtio_user_eth_dev_free(eth_dev);
 762                 goto end;
 763         }
 764
 765         if (vectorized) {
 766                 if (packed_vq) {
 767 #if defined(CC_AVX512_SUPPORT)
 768                         hw->use_vec_rx = 1;
 769                         hw->use_vec_tx = 1;
 770 #else
 771                         PMD_INIT_LOG(INFO,
 772                                 "building environment do not support packed ring vectorized");
 773 #endif
 774                 } else {
 775                         hw->use_vec_rx = 1;
 776                 }
 777         }
 778
 779         rte_eth_dev_probing_finish(eth_dev);
 780         ret = 0;
 781
 782 end:
 783         if (kvlist)
 784                 rte_kvargs_free(kvlist);
 785         if (path)
 786                 free(path);
 787         if (mac_addr)
 788                 free(mac_addr);
 789         if (ifname)
 790                 free(ifname);
 791         return ret;
 792 }
 793
 794 static int
 795 virtio_user_pmd_remove(struct rte_vdev_device *vdev)
 796 {
 797         const char *name;
 798         struct rte_eth_dev *eth_dev;
 799
 800         if (!vdev)
 801                 return -EINVAL;
 802
 803         name = rte_vdev_device_name(vdev);
 804         PMD_DRV_LOG(INFO, "Un-Initializing %s", name);
 805         eth_dev = rte_eth_dev_allocated(name);
 806         /* Port has already been released by close. */
 807         if (!eth_dev)
 808                 return 0;
 809
 810         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 811                 return rte_eth_dev_release_port(eth_dev);
 812
 813         /* make sure the device is stopped, queues freed */
 814         rte_eth_dev_close(eth_dev->data->port_id);
 815
 816         return 0;
 817 }
 818
 819 static struct rte_vdev_driver virtio_user_driver = {
 820         .probe = virtio_user_pmd_probe,
 821         .remove = virtio_user_pmd_remove,
 822 };
 823
 824 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver);
 825 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user);
 826 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user,
 827         "path=<path> "
 828         "mac=<mac addr> "
 829         "cq=<int> "
 830         "queue_size=<int> "
 831         "queues=<int> "
 832         "iface=<string> "
 833         "server=<0|1> "
 834         "mrg_rxbuf=<0|1> "
 835         "in_order=<0|1> "
 836         "packed_vq=<0|1> "
 837         "speed=<int> "
 838         "vectorized=<0|1>");