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 }
 276
 277 static uint8_t
 278 virtio_user_get_status(struct virtio_hw *hw)
 279 {
 280         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 281
 282         return dev->status;
 283 }
 284
 285 static uint64_t
 286 virtio_user_get_features(struct virtio_hw *hw)
 287 {
 288         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 289
 290         /* unmask feature bits defined in vhost user protocol */
 291         return dev->device_features & VIRTIO_PMD_SUPPORTED_GUEST_FEATURES;
 292 }
 293
 294 static void
 295 virtio_user_set_features(struct virtio_hw *hw, uint64_t features)
 296 {
 297         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 298
 299         dev->features = features & dev->device_features;
 300 }
 301
 302 static uint8_t
 303 virtio_user_get_isr(struct virtio_hw *hw __rte_unused)
 304 {
 305         /* rxq interrupts and config interrupt are separated in virtio-user,
 306          * here we only report config change.
 307          */
 308         return VIRTIO_PCI_ISR_CONFIG;
 309 }
 310
 311 static uint16_t
 312 virtio_user_set_config_irq(struct virtio_hw *hw __rte_unused,
 313                     uint16_t vec __rte_unused)
 314 {
 315         return 0;
 316 }
 317
 318 static uint16_t
 319 virtio_user_set_queue_irq(struct virtio_hw *hw __rte_unused,
 320                           struct virtqueue *vq __rte_unused,
 321                           uint16_t vec)
 322 {
 323         /* pretend we have done that */
 324         return vec;
 325 }
 326
 327 /* This function is to get the queue size, aka, number of descs, of a specified
 328  * queue. Different with the VHOST_USER_GET_QUEUE_NUM, which is used to get the
 329  * max supported queues.
 330  */
 331 static uint16_t
 332 virtio_user_get_queue_num(struct virtio_hw *hw, uint16_t queue_id __rte_unused)
 333 {
 334         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 335
 336         /* Currently, each queue has same queue size */
 337         return dev->queue_size;
 338 }
 339
 340 static void
 341 virtio_user_setup_queue_packed(struct virtqueue *vq,
 342                                struct virtio_user_dev *dev)
 343 {
 344         uint16_t queue_idx = vq->vq_queue_index;
 345         struct vring_packed *vring;
 346         uint64_t desc_addr;
 347         uint64_t avail_addr;
 348         uint64_t used_addr;
 349         uint16_t i;
 350
 351         vring  = &dev->packed_vrings[queue_idx];
 352         desc_addr = (uintptr_t)vq->vq_ring_virt_mem;
 353         avail_addr = desc_addr + vq->vq_nentries *
 354                 sizeof(struct vring_packed_desc);
 355         used_addr = RTE_ALIGN_CEIL(avail_addr +
 356                            sizeof(struct vring_packed_desc_event),
 357                            VIRTIO_PCI_VRING_ALIGN);
 358         vring->num = vq->vq_nentries;
 359         vring->desc = (void *)(uintptr_t)desc_addr;
 360         vring->driver = (void *)(uintptr_t)avail_addr;
 361         vring->device = (void *)(uintptr_t)used_addr;
 362         dev->packed_queues[queue_idx].avail_wrap_counter = true;
 363         dev->packed_queues[queue_idx].used_wrap_counter = true;
 364
 365         for (i = 0; i < vring->num; i++)
 366                 vring->desc[i].flags = 0;
 367 }
 368
 369 static void
 370 virtio_user_setup_queue_split(struct virtqueue *vq, struct virtio_user_dev *dev)
 371 {
 372         uint16_t queue_idx = vq->vq_queue_index;
 373         uint64_t desc_addr, avail_addr, used_addr;
 374
 375         desc_addr = (uintptr_t)vq->vq_ring_virt_mem;
 376         avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
 377         used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
 378                                                          ring[vq->vq_nentries]),
 379                                    VIRTIO_PCI_VRING_ALIGN);
 380
 381         dev->vrings[queue_idx].num = vq->vq_nentries;
 382         dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr;
 383         dev->vrings[queue_idx].avail = (void *)(uintptr_t)avail_addr;
 384         dev->vrings[queue_idx].used = (void *)(uintptr_t)used_addr;
 385 }
 386
 387 static int
 388 virtio_user_setup_queue(struct virtio_hw *hw, struct virtqueue *vq)
 389 {
 390         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 391
 392         if (vtpci_packed_queue(hw))
 393                 virtio_user_setup_queue_packed(vq, dev);
 394         else
 395                 virtio_user_setup_queue_split(vq, dev);
 396
 397         return 0;
 398 }
 399
 400 static void
 401 virtio_user_del_queue(struct virtio_hw *hw, struct virtqueue *vq)
 402 {
 403         /* For legacy devices, write 0 to VIRTIO_PCI_QUEUE_PFN port, QEMU
 404          * correspondingly stops the ioeventfds, and reset the status of
 405          * the device.
 406          * For modern devices, set queue desc, avail, used in PCI bar to 0,
 407          * not see any more behavior in QEMU.
 408          *
 409          * Here we just care about what information to deliver to vhost-user
 410          * or vhost-kernel. So we just close ioeventfd for now.
 411          */
 412         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 413
 414         close(dev->callfds[vq->vq_queue_index]);
 415         close(dev->kickfds[vq->vq_queue_index]);
 416 }
 417
 418 static void
 419 virtio_user_notify_queue(struct virtio_hw *hw, struct virtqueue *vq)
 420 {
 421         uint64_t buf = 1;
 422         struct virtio_user_dev *dev = virtio_user_get_dev(hw);
 423
 424         if (hw->cvq && (hw->cvq->vq == vq)) {
 425                 if (vtpci_packed_queue(vq->hw))
 426                         virtio_user_handle_cq_packed(dev, vq->vq_queue_index);
 427                 else
 428                         virtio_user_handle_cq(dev, vq->vq_queue_index);
 429                 return;
 430         }
 431
 432         if (write(dev->kickfds[vq->vq_queue_index], &buf, sizeof(buf)) < 0)
 433                 PMD_DRV_LOG(ERR, "failed to kick backend: %s",
 434                             strerror(errno));
 435 }
 436
 437 const struct virtio_pci_ops virtio_user_ops = {
 438         .read_dev_cfg   = virtio_user_read_dev_config,
 439         .write_dev_cfg  = virtio_user_write_dev_config,
 440         .get_status     = virtio_user_get_status,
 441         .set_status     = virtio_user_set_status,
 442         .get_features   = virtio_user_get_features,
 443         .set_features   = virtio_user_set_features,
 444         .get_isr        = virtio_user_get_isr,
 445         .set_config_irq = virtio_user_set_config_irq,
 446         .set_queue_irq  = virtio_user_set_queue_irq,
 447         .get_queue_num  = virtio_user_get_queue_num,
 448         .setup_queue    = virtio_user_setup_queue,
 449         .del_queue      = virtio_user_del_queue,
 450         .notify_queue   = virtio_user_notify_queue,
 451 };
 452
 453 static const char *valid_args[] = {
 454 #define VIRTIO_USER_ARG_QUEUES_NUM     "queues"
 455         VIRTIO_USER_ARG_QUEUES_NUM,
 456 #define VIRTIO_USER_ARG_CQ_NUM         "cq"
 457         VIRTIO_USER_ARG_CQ_NUM,
 458 #define VIRTIO_USER_ARG_MAC            "mac"
 459         VIRTIO_USER_ARG_MAC,
 460 #define VIRTIO_USER_ARG_PATH           "path"
 461         VIRTIO_USER_ARG_PATH,
 462 #define VIRTIO_USER_ARG_QUEUE_SIZE     "queue_size"
 463         VIRTIO_USER_ARG_QUEUE_SIZE,
 464 #define VIRTIO_USER_ARG_INTERFACE_NAME "iface"
 465         VIRTIO_USER_ARG_INTERFACE_NAME,
 466 #define VIRTIO_USER_ARG_SERVER_MODE    "server"
 467         VIRTIO_USER_ARG_SERVER_MODE,
 468 #define VIRTIO_USER_ARG_MRG_RXBUF      "mrg_rxbuf"
 469         VIRTIO_USER_ARG_MRG_RXBUF,
 470 #define VIRTIO_USER_ARG_IN_ORDER       "in_order"
 471         VIRTIO_USER_ARG_IN_ORDER,
 472 #define VIRTIO_USER_ARG_PACKED_VQ      "packed_vq"
 473         VIRTIO_USER_ARG_PACKED_VQ,
 474 #define VIRTIO_USER_ARG_SPEED          "speed"
 475         VIRTIO_USER_ARG_SPEED,
 476 #define VIRTIO_USER_ARG_VECTORIZED     "vectorized"
 477         VIRTIO_USER_ARG_VECTORIZED,
 478         NULL
 479 };
 480
 481 #define VIRTIO_USER_DEF_CQ_EN   0
 482 #define VIRTIO_USER_DEF_Q_NUM   1
 483 #define VIRTIO_USER_DEF_Q_SZ    256
 484 #define VIRTIO_USER_DEF_SERVER_MODE     0
 485
 486 static int
 487 get_string_arg(const char *key __rte_unused,
 488                const char *value, void *extra_args)
 489 {
 490         if (!value || !extra_args)
 491                 return -EINVAL;
 492
 493         *(char **)extra_args = strdup(value);
 494
 495         if (!*(char **)extra_args)
 496                 return -ENOMEM;
 497
 498         return 0;
 499 }
 500
 501 static int
 502 get_integer_arg(const char *key __rte_unused,
 503                 const char *value, void *extra_args)
 504 {
 505         uint64_t integer = 0;
 506         if (!value || !extra_args)
 507                 return -EINVAL;
 508         errno = 0;
 509         integer = strtoull(value, NULL, 0);
 510         /* extra_args keeps default value, it should be replaced
 511          * only in case of successful parsing of the 'value' arg
 512          */
 513         if (errno == 0)
 514                 *(uint64_t *)extra_args = integer;
 515         return -errno;
 516 }
 517
 518 static struct rte_eth_dev *
 519 virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev)
 520 {
 521         struct rte_eth_dev *eth_dev;
 522         struct rte_eth_dev_data *data;
 523         struct virtio_hw *hw;
 524         struct virtio_user_dev *dev;
 525
 526         eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*hw));
 527         if (!eth_dev) {
 528                 PMD_INIT_LOG(ERR, "cannot alloc rte_eth_dev");
 529                 return NULL;
 530         }
 531
 532         data = eth_dev->data;
 533         hw = eth_dev->data->dev_private;
 534
 535         dev = rte_zmalloc(NULL, sizeof(*dev), 0);
 536         if (!dev) {
 537                 PMD_INIT_LOG(ERR, "malloc virtio_user_dev failed");
 538                 rte_eth_dev_release_port(eth_dev);
 539                 return NULL;
 540         }
 541
 542         hw->port_id = data->port_id;
 543         dev->port_id = data->port_id;
 544         virtio_hw_internal[hw->port_id].vtpci_ops = &virtio_user_ops;
 545         /*
 546          * MSIX is required to enable LSC (see virtio_init_device).
 547          * Here just pretend that we support msix.
 548          */
 549         hw->use_msix = 1;
 550         hw->modern   = 0;
 551         hw->use_vec_rx = 0;
 552         hw->use_vec_tx = 0;
 553         hw->use_inorder_rx = 0;
 554         hw->use_inorder_tx = 0;
 555         hw->virtio_user_dev = dev;
 556         return eth_dev;
 557 }
 558
 559 static void
 560 virtio_user_eth_dev_free(struct rte_eth_dev *eth_dev)
 561 {
 562         struct rte_eth_dev_data *data = eth_dev->data;
 563         struct virtio_hw *hw = data->dev_private;
 564
 565         rte_free(hw->virtio_user_dev);
 566         rte_eth_dev_release_port(eth_dev);
 567 }
 568
 569 /* Dev initialization routine. Invoked once for each virtio vdev at
 570  * EAL init time, see rte_bus_probe().
 571  * Returns 0 on success.
 572  */
 573 static int
 574 virtio_user_pmd_probe(struct rte_vdev_device *dev)
 575 {
 576         struct rte_kvargs *kvlist = NULL;
 577         struct rte_eth_dev *eth_dev;
 578         struct virtio_hw *hw;
 579         uint64_t queues = VIRTIO_USER_DEF_Q_NUM;
 580         uint64_t cq = VIRTIO_USER_DEF_CQ_EN;
 581         uint64_t queue_size = VIRTIO_USER_DEF_Q_SZ;
 582         uint64_t server_mode = VIRTIO_USER_DEF_SERVER_MODE;
 583         uint64_t mrg_rxbuf = 1;
 584         uint64_t in_order = 1;
 585         uint64_t packed_vq = 0;
 586         uint64_t vectorized = 0;
 587         char *path = NULL;
 588         char *ifname = NULL;
 589         char *mac_addr = NULL;
 590         int ret = -1;
 591
 592         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
 593                 const char *name = rte_vdev_device_name(dev);
 594                 eth_dev = rte_eth_dev_attach_secondary(name);
 595                 if (!eth_dev) {
 596                         PMD_INIT_LOG(ERR, "Failed to probe %s", name);
 597                         return -1;
 598                 }
 599
 600                 if (eth_virtio_dev_init(eth_dev) < 0) {
 601                         PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails");
 602                         rte_eth_dev_release_port(eth_dev);
 603                         return -1;
 604                 }
 605
 606                 eth_dev->dev_ops = &virtio_user_secondary_eth_dev_ops;
 607                 eth_dev->device = &dev->device;
 608                 rte_eth_dev_probing_finish(eth_dev);
 609                 return 0;
 610         }
 611
 612         kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_args);
 613         if (!kvlist) {
 614                 PMD_INIT_LOG(ERR, "error when parsing param");
 615                 goto end;
 616         }
 617
 618         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PATH) == 1) {
 619                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PATH,
 620                                        &get_string_arg, &path) < 0) {
 621                         PMD_INIT_LOG(ERR, "error to parse %s",
 622                                      VIRTIO_USER_ARG_PATH);
 623                         goto end;
 624                 }
 625         } else {
 626                 PMD_INIT_LOG(ERR, "arg %s is mandatory for virtio_user",
 627                              VIRTIO_USER_ARG_PATH);
 628                 goto end;
 629         }
 630
 631         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME) == 1) {
 632                 if (is_vhost_user_by_type(path)) {
 633                         PMD_INIT_LOG(ERR,
 634                                 "arg %s applies only to vhost-kernel backend",
 635                                 VIRTIO_USER_ARG_INTERFACE_NAME);
 636                         goto end;
 637                 }
 638
 639                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_INTERFACE_NAME,
 640                                        &get_string_arg, &ifname) < 0) {
 641                         PMD_INIT_LOG(ERR, "error to parse %s",
 642                                      VIRTIO_USER_ARG_INTERFACE_NAME);
 643                         goto end;
 644                 }
 645         }
 646
 647         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MAC) == 1) {
 648                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MAC,
 649                                        &get_string_arg, &mac_addr) < 0) {
 650                         PMD_INIT_LOG(ERR, "error to parse %s",
 651                                      VIRTIO_USER_ARG_MAC);
 652                         goto end;
 653                 }
 654         }
 655
 656         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE) == 1) {
 657                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUE_SIZE,
 658                                        &get_integer_arg, &queue_size) < 0) {
 659                         PMD_INIT_LOG(ERR, "error to parse %s",
 660                                      VIRTIO_USER_ARG_QUEUE_SIZE);
 661                         goto end;
 662                 }
 663         }
 664
 665         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_QUEUES_NUM) == 1) {
 666                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_QUEUES_NUM,
 667                                        &get_integer_arg, &queues) < 0) {
 668                         PMD_INIT_LOG(ERR, "error to parse %s",
 669                                      VIRTIO_USER_ARG_QUEUES_NUM);
 670                         goto end;
 671                 }
 672         }
 673
 674         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_SERVER_MODE) == 1) {
 675                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_SERVER_MODE,
 676                                        &get_integer_arg, &server_mode) < 0) {
 677                         PMD_INIT_LOG(ERR, "error to parse %s",
 678                                      VIRTIO_USER_ARG_SERVER_MODE);
 679                         goto end;
 680                 }
 681         }
 682
 683         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_CQ_NUM) == 1) {
 684                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_CQ_NUM,
 685                                        &get_integer_arg, &cq) < 0) {
 686                         PMD_INIT_LOG(ERR, "error to parse %s",
 687                                      VIRTIO_USER_ARG_CQ_NUM);
 688                         goto end;
 689                 }
 690         } else if (queues > 1) {
 691                 cq = 1;
 692         }
 693
 694         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_PACKED_VQ) == 1) {
 695                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_PACKED_VQ,
 696                                        &get_integer_arg, &packed_vq) < 0) {
 697                         PMD_INIT_LOG(ERR, "error to parse %s",
 698                                      VIRTIO_USER_ARG_PACKED_VQ);
 699                         goto end;
 700                 }
 701         }
 702
 703         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_VECTORIZED) == 1) {
 704                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_VECTORIZED,
 705                                        &get_integer_arg, &vectorized) < 0) {
 706                         PMD_INIT_LOG(ERR, "error to parse %s",
 707                                      VIRTIO_USER_ARG_VECTORIZED);
 708                         goto end;
 709                 }
 710         }
 711
 712         if (queues > 1 && cq == 0) {
 713                 PMD_INIT_LOG(ERR, "multi-q requires ctrl-q");
 714                 goto end;
 715         }
 716
 717         if (queues > VIRTIO_MAX_VIRTQUEUE_PAIRS) {
 718                 PMD_INIT_LOG(ERR, "arg %s %" PRIu64 " exceeds the limit %u",
 719                         VIRTIO_USER_ARG_QUEUES_NUM, queues,
 720                         VIRTIO_MAX_VIRTQUEUE_PAIRS);
 721                 goto end;
 722         }
 723
 724         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_MRG_RXBUF) == 1) {
 725                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_MRG_RXBUF,
 726                                        &get_integer_arg, &mrg_rxbuf) < 0) {
 727                         PMD_INIT_LOG(ERR, "error to parse %s",
 728                                      VIRTIO_USER_ARG_MRG_RXBUF);
 729                         goto end;
 730                 }
 731         }
 732
 733         if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_IN_ORDER) == 1) {
 734                 if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_IN_ORDER,
 735                                        &get_integer_arg, &in_order) < 0) {
 736                         PMD_INIT_LOG(ERR, "error to parse %s",
 737                                      VIRTIO_USER_ARG_IN_ORDER);
 738                         goto end;
 739                 }
 740         }
 741
 742         eth_dev = virtio_user_eth_dev_alloc(dev);
 743         if (!eth_dev) {
 744                 PMD_INIT_LOG(ERR, "virtio_user fails to alloc device");
 745                 goto end;
 746         }
 747
 748         hw = eth_dev->data->dev_private;
 749         if (virtio_user_dev_init(hw->virtio_user_dev, path, queues, cq,
 750                          queue_size, mac_addr, &ifname, server_mode,
 751                          mrg_rxbuf, in_order, packed_vq) < 0) {
 752                 PMD_INIT_LOG(ERR, "virtio_user_dev_init fails");
 753                 virtio_user_eth_dev_free(eth_dev);
 754                 goto end;
 755         }
 756
 757         /* previously called by pci probing for physical dev */
 758         if (eth_virtio_dev_init(eth_dev) < 0) {
 759                 PMD_INIT_LOG(ERR, "eth_virtio_dev_init fails");
 760                 virtio_user_eth_dev_free(eth_dev);
 761                 goto end;
 762         }
 763
 764         if (vectorized) {
 765                 if (packed_vq) {
 766 #if defined(CC_AVX512_SUPPORT)
 767                         hw->use_vec_rx = 1;
 768                         hw->use_vec_tx = 1;
 769 #else
 770                         PMD_INIT_LOG(INFO,
 771                                 "building environment do not support packed ring vectorized");
 772 #endif
 773                 } else {
 774                         hw->use_vec_rx = 1;
 775                 }
 776         }
 777
 778         rte_eth_dev_probing_finish(eth_dev);
 779         ret = 0;
 780
 781 end:
 782         if (kvlist)
 783                 rte_kvargs_free(kvlist);
 784         if (path)
 785                 free(path);
 786         if (mac_addr)
 787                 free(mac_addr);
 788         if (ifname)
 789                 free(ifname);
 790         return ret;
 791 }
 792
 793 static int
 794 virtio_user_pmd_remove(struct rte_vdev_device *vdev)
 795 {
 796         const char *name;
 797         struct rte_eth_dev *eth_dev;
 798
 799         if (!vdev)
 800                 return -EINVAL;
 801
 802         name = rte_vdev_device_name(vdev);
 803         PMD_DRV_LOG(INFO, "Un-Initializing %s", name);
 804         eth_dev = rte_eth_dev_allocated(name);
 805         /* Port has already been released by close. */
 806         if (!eth_dev)
 807                 return 0;
 808
 809         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 810                 return rte_eth_dev_release_port(eth_dev);
 811
 812         /* make sure the device is stopped, queues freed */
 813         rte_eth_dev_close(eth_dev->data->port_id);
 814
 815         return 0;
 816 }
 817
 818 static struct rte_vdev_driver virtio_user_driver = {
 819         .probe = virtio_user_pmd_probe,
 820         .remove = virtio_user_pmd_remove,
 821 };
 822
 823 RTE_PMD_REGISTER_VDEV(net_virtio_user, virtio_user_driver);
 824 RTE_PMD_REGISTER_ALIAS(net_virtio_user, virtio_user);
 825 RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user,
 826         "path=<path> "
 827         "mac=<mac addr> "
 828         "cq=<int> "
 829         "queue_size=<int> "
 830         "queues=<int> "
 831         "iface=<string> "
 832         "server=<0|1> "
 833         "mrg_rxbuf=<0|1> "
 834         "in_order=<0|1> "
 835         "packed_vq=<0|1> "
 836         "speed=<int> "
 837         "vectorized=<0|1>");