drivers/net/virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdint.h>
  35 #include <string.h>
  36 #include <stdio.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39 #ifdef RTE_EXEC_ENV_LINUXAPP
  40 #include <dirent.h>
  41 #include <fcntl.h>
  42 #endif
  43
  44 #include <rte_ethdev.h>
  45 #include <rte_memcpy.h>
  46 #include <rte_string_fns.h>
  47 #include <rte_memzone.h>
  48 #include <rte_malloc.h>
  49 #include <rte_atomic.h>
  50 #include <rte_branch_prediction.h>
  51 #include <rte_pci.h>
  52 #include <rte_ether.h>
  53 #include <rte_common.h>
  54 #include <rte_errno.h>
  55
  56 #include <rte_memory.h>
  57 #include <rte_eal.h>
  58 #include <rte_dev.h>
  59
  60 #include "virtio_ethdev.h"
  61 #include "virtio_pci.h"
  62 #include "virtio_logs.h"
  63 #include "virtqueue.h"
  64 #include "virtio_rxtx.h"
  65
  66
  67 static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
  68 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  69 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  70 static int  virtio_dev_start(struct rte_eth_dev *dev);
  71 static void virtio_dev_stop(struct rte_eth_dev *dev);
  72 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  73 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  74 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  75 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  76 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  77                                 struct rte_eth_dev_info *dev_info);
  78 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  79         __rte_unused int wait_to_complete);
  80
  81 static void virtio_set_hwaddr(struct virtio_hw *hw);
  82 static void virtio_get_hwaddr(struct virtio_hw *hw);
  83
  84 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  85                                  struct rte_eth_stats *stats);
  86 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  87                                  struct rte_eth_xstats *xstats, unsigned n);
  88 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  89 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  90 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  91                                 uint16_t vlan_id, int on);
  92 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  93                                 struct ether_addr *mac_addr,
  94                                 uint32_t index, uint32_t vmdq __rte_unused);
  95 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  96 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  97                                 struct ether_addr *mac_addr);
  98
  99 static int virtio_dev_queue_stats_mapping_set(
 100         __rte_unused struct rte_eth_dev *eth_dev,
 101         __rte_unused uint16_t queue_id,
 102         __rte_unused uint8_t stat_idx,
 103         __rte_unused uint8_t is_rx);
 104
 105 /*
 106  * The set of PCI devices this driver supports
 107  */
 108 static const struct rte_pci_id pci_id_virtio_map[] = {
 109
 110 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
 111 #include "rte_pci_dev_ids.h"
 112
 113 { .vendor_id = 0, /* sentinel */ },
 114 };
 115
 116 struct rte_virtio_xstats_name_off {
 117         char name[RTE_ETH_XSTATS_NAME_SIZE];
 118         unsigned offset;
 119 };
 120
 121 /* [rt]x_qX_ is prepended to the name string here */
 122 static const struct rte_virtio_xstats_name_off rte_virtio_q_stat_strings[] = {
 123         {"good_packets",           offsetof(struct virtqueue, packets)},
 124         {"good_bytes",             offsetof(struct virtqueue, bytes)},
 125         {"errors",                 offsetof(struct virtqueue, errors)},
 126         {"multicast_packets",      offsetof(struct virtqueue, multicast)},
 127         {"broadcast_packets",      offsetof(struct virtqueue, broadcast)},
 128         {"undersize_packets",      offsetof(struct virtqueue, size_bins[0])},
 129         {"size_64_packets",        offsetof(struct virtqueue, size_bins[1])},
 130         {"size_65_127_packets",    offsetof(struct virtqueue, size_bins[2])},
 131         {"size_128_255_packets",   offsetof(struct virtqueue, size_bins[3])},
 132         {"size_256_511_packets",   offsetof(struct virtqueue, size_bins[4])},
 133         {"size_512_1023_packets",  offsetof(struct virtqueue, size_bins[5])},
 134         {"size_1024_1517_packets", offsetof(struct virtqueue, size_bins[6])},
 135         {"size_1518_max_packets",  offsetof(struct virtqueue, size_bins[7])},
 136 };
 137
 138 #define VIRTIO_NB_Q_XSTATS (sizeof(rte_virtio_q_stat_strings) / \
 139                             sizeof(rte_virtio_q_stat_strings[0]))
 140
 141 static int
 142 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
 143                 int *dlen, int pkt_num)
 144 {
 145         uint32_t head, i;
 146         int k, sum = 0;
 147         virtio_net_ctrl_ack status = ~0;
 148         struct virtio_pmd_ctrl result;
 149
 150         ctrl->status = status;
 151
 152         if (!(vq && vq->hw->cvq)) {
 153                 PMD_INIT_LOG(ERR,
 154                              "%s(): Control queue is not supported.",
 155                              __func__);
 156                 return -1;
 157         }
 158         head = vq->vq_desc_head_idx;
 159
 160         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 161                 "vq->hw->cvq = %p vq = %p",
 162                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 163
 164         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 165                 return -1;
 166
 167         memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
 168                 sizeof(struct virtio_pmd_ctrl));
 169
 170         /*
 171          * Format is enforced in qemu code:
 172          * One TX packet for header;
 173          * At least one TX packet per argument;
 174          * One RX packet for ACK.
 175          */
 176         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 177         vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
 178         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 179         vq->vq_free_cnt--;
 180         i = vq->vq_ring.desc[head].next;
 181
 182         for (k = 0; k < pkt_num; k++) {
 183                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 184                 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 185                         + sizeof(struct virtio_net_ctrl_hdr)
 186                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 187                 vq->vq_ring.desc[i].len = dlen[k];
 188                 sum += dlen[k];
 189                 vq->vq_free_cnt--;
 190                 i = vq->vq_ring.desc[i].next;
 191         }
 192
 193         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 194         vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 195                         + sizeof(struct virtio_net_ctrl_hdr);
 196         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 197         vq->vq_free_cnt--;
 198
 199         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 200
 201         vq_update_avail_ring(vq, head);
 202         vq_update_avail_idx(vq);
 203
 204         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 205
 206         virtqueue_notify(vq);
 207
 208         rte_rmb();
 209         while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
 210                 rte_rmb();
 211                 usleep(100);
 212         }
 213
 214         while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
 215                 uint32_t idx, desc_idx, used_idx;
 216                 struct vring_used_elem *uep;
 217
 218                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 219                                 & (vq->vq_nentries - 1));
 220                 uep = &vq->vq_ring.used->ring[used_idx];
 221                 idx = (uint32_t) uep->id;
 222                 desc_idx = idx;
 223
 224                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 225                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 226                         vq->vq_free_cnt++;
 227                 }
 228
 229                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 230                 vq->vq_desc_head_idx = idx;
 231
 232                 vq->vq_used_cons_idx++;
 233                 vq->vq_free_cnt++;
 234         }
 235
 236         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 237                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 238
 239         memcpy(&result, vq->virtio_net_hdr_mz->addr,
 240                         sizeof(struct virtio_pmd_ctrl));
 241
 242         return result.status;
 243 }
 244
 245 static int
 246 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 247 {
 248         struct virtio_hw *hw = dev->data->dev_private;
 249         struct virtio_pmd_ctrl ctrl;
 250         int dlen[1];
 251         int ret;
 252
 253         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 254         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 255         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 256
 257         dlen[0] = sizeof(uint16_t);
 258
 259         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 260         if (ret) {
 261                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 262                           "failed, this is too late now...");
 263                 return -EINVAL;
 264         }
 265
 266         return 0;
 267 }
 268
 269 void
 270 virtio_dev_queue_release(struct virtqueue *vq) {
 271         struct virtio_hw *hw;
 272
 273         if (vq) {
 274                 hw = vq->hw;
 275                 /* Select and deactivate the queue */
 276                 VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vq->vq_queue_index);
 277                 VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN, 0);
 278
 279                 rte_free(vq->sw_ring);
 280                 rte_free(vq);
 281         }
 282 }
 283
 284 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 285                         int queue_type,
 286                         uint16_t queue_idx,
 287                         uint16_t vtpci_queue_idx,
 288                         uint16_t nb_desc,
 289                         unsigned int socket_id,
 290                         struct virtqueue **pvq)
 291 {
 292         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 293         const struct rte_memzone *mz;
 294         unsigned int vq_size, size;
 295         struct virtio_hw *hw = dev->data->dev_private;
 296         struct virtqueue *vq = NULL;
 297
 298         /* Write the virtqueue index to the Queue Select Field */
 299         VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
 300         PMD_INIT_LOG(DEBUG, "selecting queue: %u", vtpci_queue_idx);
 301
 302         /*
 303          * Read the virtqueue size from the Queue Size field
 304          * Always power of 2 and if 0 virtqueue does not exist
 305          */
 306         vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
 307         PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc);
 308         if (vq_size == 0) {
 309                 PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
 310                 return -EINVAL;
 311         }
 312
 313         if (!rte_is_power_of_2(vq_size)) {
 314                 PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
 315                 return -EINVAL;
 316         }
 317
 318         if (queue_type == VTNET_RQ) {
 319                 snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
 320                         dev->data->port_id, queue_idx);
 321                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 322                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 323                 vq->sw_ring = rte_zmalloc_socket("rxq->sw_ring",
 324                         (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 325                         sizeof(vq->sw_ring[0]), RTE_CACHE_LINE_SIZE, socket_id);
 326         } else if (queue_type == VTNET_TQ) {
 327                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
 328                         dev->data->port_id, queue_idx);
 329                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 330                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 331         } else if (queue_type == VTNET_CQ) {
 332                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
 333                         dev->data->port_id);
 334                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 335                         vq_size * sizeof(struct vq_desc_extra),
 336                         RTE_CACHE_LINE_SIZE);
 337         }
 338         if (vq == NULL) {
 339                 PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__);
 340                 return (-ENOMEM);
 341         }
 342         if (queue_type == VTNET_RQ && vq->sw_ring == NULL) {
 343                 PMD_INIT_LOG(ERR, "%s: Can not allocate RX soft ring",
 344                         __func__);
 345                 rte_free(vq);
 346                 return -ENOMEM;
 347         }
 348
 349         vq->hw = hw;
 350         vq->port_id = dev->data->port_id;
 351         vq->queue_id = queue_idx;
 352         vq->vq_queue_index = vtpci_queue_idx;
 353         vq->vq_nentries = vq_size;
 354
 355         if (nb_desc == 0 || nb_desc > vq_size)
 356                 nb_desc = vq_size;
 357         vq->vq_free_cnt = nb_desc;
 358
 359         /*
 360          * Reserve a memzone for vring elements
 361          */
 362         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 363         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 364         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
 365
 366         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 367                 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
 368         if (mz == NULL) {
 369                 if (rte_errno == EEXIST)
 370                         mz = rte_memzone_lookup(vq_name);
 371                 if (mz == NULL) {
 372                         rte_free(vq);
 373                         return -ENOMEM;
 374                 }
 375         }
 376
 377         /*
 378          * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
 379          * and only accepts 32 bit page frame number.
 380          * Check if the allocated physical memory exceeds 16TB.
 381          */
 382         if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
 383                 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
 384                 rte_free(vq);
 385                 return -ENOMEM;
 386         }
 387
 388         memset(mz->addr, 0, sizeof(mz->len));
 389         vq->mz = mz;
 390         vq->vq_ring_mem = mz->phys_addr;
 391         vq->vq_ring_virt_mem = mz->addr;
 392         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64, (uint64_t)mz->phys_addr);
 393         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
 394         vq->virtio_net_hdr_mz  = NULL;
 395         vq->virtio_net_hdr_mem = 0;
 396
 397         if (queue_type == VTNET_TQ) {
 398                 /*
 399                  * For each xmit packet, allocate a virtio_net_hdr
 400                  */
 401                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
 402                         dev->data->port_id, queue_idx);
 403                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 404                         vq_size * hw->vtnet_hdr_size,
 405                         socket_id, 0, RTE_CACHE_LINE_SIZE);
 406                 if (vq->virtio_net_hdr_mz == NULL) {
 407                         if (rte_errno == EEXIST)
 408                                 vq->virtio_net_hdr_mz =
 409                                         rte_memzone_lookup(vq_name);
 410                         if (vq->virtio_net_hdr_mz == NULL) {
 411                                 rte_free(vq);
 412                                 return -ENOMEM;
 413                         }
 414                 }
 415                 vq->virtio_net_hdr_mem =
 416                         vq->virtio_net_hdr_mz->phys_addr;
 417                 memset(vq->virtio_net_hdr_mz->addr, 0,
 418                         vq_size * hw->vtnet_hdr_size);
 419         } else if (queue_type == VTNET_CQ) {
 420                 /* Allocate a page for control vq command, data and status */
 421                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
 422                         dev->data->port_id);
 423                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 424                         PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
 425                 if (vq->virtio_net_hdr_mz == NULL) {
 426                         if (rte_errno == EEXIST)
 427                                 vq->virtio_net_hdr_mz =
 428                                         rte_memzone_lookup(vq_name);
 429                         if (vq->virtio_net_hdr_mz == NULL) {
 430                                 rte_free(vq);
 431                                 return -ENOMEM;
 432                         }
 433                 }
 434                 vq->virtio_net_hdr_mem =
 435                         vq->virtio_net_hdr_mz->phys_addr;
 436                 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 437         }
 438
 439         /*
 440          * Set guest physical address of the virtqueue
 441          * in VIRTIO_PCI_QUEUE_PFN config register of device
 442          */
 443         VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
 444                         mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
 445         *pvq = vq;
 446         return 0;
 447 }
 448
 449 static int
 450 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 451                 uint32_t socket_id)
 452 {
 453         struct virtqueue *vq;
 454         int ret;
 455         struct virtio_hw *hw = dev->data->dev_private;
 456
 457         PMD_INIT_FUNC_TRACE();
 458         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 459                         vtpci_queue_idx, 0, socket_id, &vq);
 460         if (ret < 0) {
 461                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 462                 return ret;
 463         }
 464
 465         hw->cvq = vq;
 466         return 0;
 467 }
 468
 469 static void
 470 virtio_free_queues(struct rte_eth_dev *dev)
 471 {
 472         unsigned int i;
 473
 474         for (i = 0; i < dev->data->nb_rx_queues; i++)
 475                 virtio_dev_rx_queue_release(dev->data->rx_queues[i]);
 476
 477         dev->data->nb_rx_queues = 0;
 478
 479         for (i = 0; i < dev->data->nb_tx_queues; i++)
 480                 virtio_dev_tx_queue_release(dev->data->tx_queues[i]);
 481
 482         dev->data->nb_tx_queues = 0;
 483 }
 484
 485 static void
 486 virtio_dev_close(struct rte_eth_dev *dev)
 487 {
 488         struct virtio_hw *hw = dev->data->dev_private;
 489         struct rte_pci_device *pci_dev = dev->pci_dev;
 490
 491         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 492
 493         /* reset the NIC */
 494         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
 495                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 496         vtpci_reset(hw);
 497         hw->started = 0;
 498         virtio_dev_free_mbufs(dev);
 499         virtio_free_queues(dev);
 500 }
 501
 502 static void
 503 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 504 {
 505         struct virtio_hw *hw = dev->data->dev_private;
 506         struct virtio_pmd_ctrl ctrl;
 507         int dlen[1];
 508         int ret;
 509
 510         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 511                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 512                 return;
 513         }
 514
 515         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 516         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 517         ctrl.data[0] = 1;
 518         dlen[0] = 1;
 519
 520         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 521         if (ret)
 522                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 523 }
 524
 525 static void
 526 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 527 {
 528         struct virtio_hw *hw = dev->data->dev_private;
 529         struct virtio_pmd_ctrl ctrl;
 530         int dlen[1];
 531         int ret;
 532
 533         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 534                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 535                 return;
 536         }
 537
 538         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 539         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 540         ctrl.data[0] = 0;
 541         dlen[0] = 1;
 542
 543         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 544         if (ret)
 545                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 546 }
 547
 548 static void
 549 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 550 {
 551         struct virtio_hw *hw = dev->data->dev_private;
 552         struct virtio_pmd_ctrl ctrl;
 553         int dlen[1];
 554         int ret;
 555
 556         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 557                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 558                 return;
 559         }
 560
 561         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 562         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 563         ctrl.data[0] = 1;
 564         dlen[0] = 1;
 565
 566         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 567         if (ret)
 568                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 569 }
 570
 571 static void
 572 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 573 {
 574         struct virtio_hw *hw = dev->data->dev_private;
 575         struct virtio_pmd_ctrl ctrl;
 576         int dlen[1];
 577         int ret;
 578
 579         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 580                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 581                 return;
 582         }
 583
 584         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 585         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 586         ctrl.data[0] = 0;
 587         dlen[0] = 1;
 588
 589         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 590         if (ret)
 591                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 592 }
 593
 594 /*
 595  * dev_ops for virtio, bare necessities for basic operation
 596  */
 597 static const struct eth_dev_ops virtio_eth_dev_ops = {
 598         .dev_configure           = virtio_dev_configure,
 599         .dev_start               = virtio_dev_start,
 600         .dev_stop                = virtio_dev_stop,
 601         .dev_close               = virtio_dev_close,
 602         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 603         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 604         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 605         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 606
 607         .dev_infos_get           = virtio_dev_info_get,
 608         .stats_get               = virtio_dev_stats_get,
 609         .xstats_get              = virtio_dev_xstats_get,
 610         .stats_reset             = virtio_dev_stats_reset,
 611         .xstats_reset            = virtio_dev_stats_reset,
 612         .link_update             = virtio_dev_link_update,
 613         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 614         .rx_queue_release        = virtio_dev_rx_queue_release,
 615         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 616         .tx_queue_release        = virtio_dev_tx_queue_release,
 617         /* collect stats per queue */
 618         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 619         .vlan_filter_set         = virtio_vlan_filter_set,
 620         .mac_addr_add            = virtio_mac_addr_add,
 621         .mac_addr_remove         = virtio_mac_addr_remove,
 622         .mac_addr_set            = virtio_mac_addr_set,
 623 };
 624
 625 static inline int
 626 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 627                                 struct rte_eth_link *link)
 628 {
 629         struct rte_eth_link *dst = link;
 630         struct rte_eth_link *src = &(dev->data->dev_link);
 631
 632         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 633                         *(uint64_t *)src) == 0)
 634                 return -1;
 635
 636         return 0;
 637 }
 638
 639 /**
 640  * Atomically writes the link status information into global
 641  * structure rte_eth_dev.
 642  *
 643  * @param dev
 644  *   - Pointer to the structure rte_eth_dev to read from.
 645  *   - Pointer to the buffer to be saved with the link status.
 646  *
 647  * @return
 648  *   - On success, zero.
 649  *   - On failure, negative value.
 650  */
 651 static inline int
 652 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 653                 struct rte_eth_link *link)
 654 {
 655         struct rte_eth_link *dst = &(dev->data->dev_link);
 656         struct rte_eth_link *src = link;
 657
 658         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 659                                         *(uint64_t *)src) == 0)
 660                 return -1;
 661
 662         return 0;
 663 }
 664
 665 static void
 666 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 667 {
 668         unsigned i;
 669
 670         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 671                 const struct virtqueue *txvq = dev->data->tx_queues[i];
 672                 if (txvq == NULL)
 673                         continue;
 674
 675                 stats->opackets += txvq->packets;
 676                 stats->obytes += txvq->bytes;
 677                 stats->oerrors += txvq->errors;
 678
 679                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 680                         stats->q_opackets[i] = txvq->packets;
 681                         stats->q_obytes[i] = txvq->bytes;
 682                 }
 683         }
 684
 685         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 686                 const struct virtqueue *rxvq = dev->data->rx_queues[i];
 687                 if (rxvq == NULL)
 688                         continue;
 689
 690                 stats->ipackets += rxvq->packets;
 691                 stats->ibytes += rxvq->bytes;
 692                 stats->ierrors += rxvq->errors;
 693
 694                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 695                         stats->q_ipackets[i] = rxvq->packets;
 696                         stats->q_ibytes[i] = rxvq->bytes;
 697                 }
 698         }
 699
 700         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 701 }
 702
 703 static int
 704 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstats *xstats,
 705                       unsigned n)
 706 {
 707         unsigned i;
 708         unsigned count = 0;
 709
 710         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_Q_XSTATS +
 711                 dev->data->nb_rx_queues * VIRTIO_NB_Q_XSTATS;
 712
 713         if (n < nstats)
 714                 return nstats;
 715
 716         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 717                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 718
 719                 if (rxvq == NULL)
 720                         continue;
 721
 722                 unsigned t;
 723
 724                 for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) {
 725                         snprintf(xstats[count].name, sizeof(xstats[count].name),
 726                                  "rx_q%u_%s", i,
 727                                  rte_virtio_q_stat_strings[t].name);
 728                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 729                                 rte_virtio_q_stat_strings[t].offset);
 730                         count++;
 731                 }
 732         }
 733
 734         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 735                 struct virtqueue *txvq = dev->data->tx_queues[i];
 736
 737                 if (txvq == NULL)
 738                         continue;
 739
 740                 unsigned t;
 741
 742                 for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) {
 743                         snprintf(xstats[count].name, sizeof(xstats[count].name),
 744                                  "tx_q%u_%s", i,
 745                                  rte_virtio_q_stat_strings[t].name);
 746                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 747                                 rte_virtio_q_stat_strings[t].offset);
 748                         count++;
 749                 }
 750         }
 751
 752         return count;
 753 }
 754
 755 static void
 756 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 757 {
 758         virtio_update_stats(dev, stats);
 759 }
 760
 761 static void
 762 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 763 {
 764         unsigned int i;
 765
 766         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 767                 struct virtqueue *txvq = dev->data->tx_queues[i];
 768                 if (txvq == NULL)
 769                         continue;
 770
 771                 txvq->packets = 0;
 772                 txvq->bytes = 0;
 773                 txvq->errors = 0;
 774                 txvq->multicast = 0;
 775                 txvq->broadcast = 0;
 776                 memset(txvq->size_bins, 0, sizeof(txvq->size_bins[0]) * 8);
 777         }
 778
 779         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 780                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 781                 if (rxvq == NULL)
 782                         continue;
 783
 784                 rxvq->packets = 0;
 785                 rxvq->bytes = 0;
 786                 rxvq->errors = 0;
 787                 rxvq->multicast = 0;
 788                 rxvq->broadcast = 0;
 789                 memset(rxvq->size_bins, 0, sizeof(rxvq->size_bins[0]) * 8);
 790         }
 791 }
 792
 793 static void
 794 virtio_set_hwaddr(struct virtio_hw *hw)
 795 {
 796         vtpci_write_dev_config(hw,
 797                         offsetof(struct virtio_net_config, mac),
 798                         &hw->mac_addr, ETHER_ADDR_LEN);
 799 }
 800
 801 static void
 802 virtio_get_hwaddr(struct virtio_hw *hw)
 803 {
 804         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 805                 vtpci_read_dev_config(hw,
 806                         offsetof(struct virtio_net_config, mac),
 807                         &hw->mac_addr, ETHER_ADDR_LEN);
 808         } else {
 809                 eth_random_addr(&hw->mac_addr[0]);
 810                 virtio_set_hwaddr(hw);
 811         }
 812 }
 813
 814 static void
 815 virtio_mac_table_set(struct virtio_hw *hw,
 816                      const struct virtio_net_ctrl_mac *uc,
 817                      const struct virtio_net_ctrl_mac *mc)
 818 {
 819         struct virtio_pmd_ctrl ctrl;
 820         int err, len[2];
 821
 822         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 823                 PMD_DRV_LOG(INFO, "host does not support mac table\n");
 824                 return;
 825         }
 826
 827         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 828         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 829
 830         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 831         memcpy(ctrl.data, uc, len[0]);
 832
 833         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 834         memcpy(ctrl.data + len[0], mc, len[1]);
 835
 836         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 837         if (err != 0)
 838                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 839 }
 840
 841 static void
 842 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 843                     uint32_t index, uint32_t vmdq __rte_unused)
 844 {
 845         struct virtio_hw *hw = dev->data->dev_private;
 846         const struct ether_addr *addrs = dev->data->mac_addrs;
 847         unsigned int i;
 848         struct virtio_net_ctrl_mac *uc, *mc;
 849
 850         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 851                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 852                 return;
 853         }
 854
 855         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 856         uc->entries = 0;
 857         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 858         mc->entries = 0;
 859
 860         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 861                 const struct ether_addr *addr
 862                         = (i == index) ? mac_addr : addrs + i;
 863                 struct virtio_net_ctrl_mac *tbl
 864                         = is_multicast_ether_addr(addr) ? mc : uc;
 865
 866                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 867         }
 868
 869         virtio_mac_table_set(hw, uc, mc);
 870 }
 871
 872 static void
 873 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 874 {
 875         struct virtio_hw *hw = dev->data->dev_private;
 876         struct ether_addr *addrs = dev->data->mac_addrs;
 877         struct virtio_net_ctrl_mac *uc, *mc;
 878         unsigned int i;
 879
 880         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 881                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 882                 return;
 883         }
 884
 885         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 886         uc->entries = 0;
 887         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 888         mc->entries = 0;
 889
 890         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 891                 struct virtio_net_ctrl_mac *tbl;
 892
 893                 if (i == index || is_zero_ether_addr(addrs + i))
 894                         continue;
 895
 896                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
 897                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
 898         }
 899
 900         virtio_mac_table_set(hw, uc, mc);
 901 }
 902
 903 static void
 904 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
 905 {
 906         struct virtio_hw *hw = dev->data->dev_private;
 907
 908         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
 909
 910         /* Use atomic update if available */
 911         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 912                 struct virtio_pmd_ctrl ctrl;
 913                 int len = ETHER_ADDR_LEN;
 914
 915                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 916                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
 917
 918                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
 919                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
 920         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
 921                 virtio_set_hwaddr(hw);
 922 }
 923
 924 static int
 925 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 926 {
 927         struct virtio_hw *hw = dev->data->dev_private;
 928         struct virtio_pmd_ctrl ctrl;
 929         int len;
 930
 931         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
 932                 return -ENOTSUP;
 933
 934         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
 935         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
 936         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
 937         len = sizeof(vlan_id);
 938
 939         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
 940 }
 941
 942 static void
 943 virtio_negotiate_features(struct virtio_hw *hw)
 944 {
 945         uint32_t host_features;
 946
 947         /* Prepare guest_features: feature that driver wants to support */
 948         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
 949         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
 950                 hw->guest_features);
 951
 952         /* Read device(host) feature bits */
 953         host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
 954         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
 955                 host_features);
 956
 957         /*
 958          * Negotiate features: Subset of device feature bits are written back
 959          * guest feature bits.
 960          */
 961         hw->guest_features = vtpci_negotiate_features(hw, host_features);
 962         PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
 963                 hw->guest_features);
 964 }
 965
 966 #ifdef RTE_EXEC_ENV_LINUXAPP
 967 static int
 968 parse_sysfs_value(const char *filename, unsigned long *val)
 969 {
 970         FILE *f;
 971         char buf[BUFSIZ];
 972         char *end = NULL;
 973
 974         f = fopen(filename, "r");
 975         if (f == NULL) {
 976                 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
 977                              __func__, filename);
 978                 return -1;
 979         }
 980
 981         if (fgets(buf, sizeof(buf), f) == NULL) {
 982                 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
 983                              __func__, filename);
 984                 fclose(f);
 985                 return -1;
 986         }
 987         *val = strtoul(buf, &end, 0);
 988         if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
 989                 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
 990                              __func__, filename);
 991                 fclose(f);
 992                 return -1;
 993         }
 994         fclose(f);
 995         return 0;
 996 }
 997
 998 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen,
 999                         unsigned int *uio_num)
1000 {
1001         struct dirent *e;
1002         DIR *dir;
1003         char dirname[PATH_MAX];
1004
1005         /* depending on kernel version, uio can be located in uio/uioX
1006          * or uio:uioX */
1007         snprintf(dirname, sizeof(dirname),
1008                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
1009                      loc->domain, loc->bus, loc->devid, loc->function);
1010         dir = opendir(dirname);
1011         if (dir == NULL) {
1012                 /* retry with the parent directory */
1013                 snprintf(dirname, sizeof(dirname),
1014                              SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
1015                              loc->domain, loc->bus, loc->devid, loc->function);
1016                 dir = opendir(dirname);
1017
1018                 if (dir == NULL) {
1019                         PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
1020                         return -1;
1021                 }
1022         }
1023
1024         /* take the first file starting with "uio" */
1025         while ((e = readdir(dir)) != NULL) {
1026                 /* format could be uio%d ...*/
1027                 int shortprefix_len = sizeof("uio") - 1;
1028                 /* ... or uio:uio%d */
1029                 int longprefix_len = sizeof("uio:uio") - 1;
1030                 char *endptr;
1031
1032                 if (strncmp(e->d_name, "uio", 3) != 0)
1033                         continue;
1034
1035                 /* first try uio%d */
1036                 errno = 0;
1037                 *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
1038                 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
1039                         snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num);
1040                         break;
1041                 }
1042
1043                 /* then try uio:uio%d */
1044                 errno = 0;
1045                 *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
1046                 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
1047                         snprintf(buf, buflen, "%s/uio:uio%u", dirname,
1048                                      *uio_num);
1049                         break;
1050                 }
1051         }
1052         closedir(dir);
1053
1054         /* No uio resource found */
1055         if (e == NULL) {
1056                 PMD_INIT_LOG(ERR, "Could not find uio resource");
1057                 return -1;
1058         }
1059
1060         return 0;
1061 }
1062
1063 static int
1064 virtio_has_msix(const struct rte_pci_addr *loc)
1065 {
1066         DIR *d;
1067         char dirname[PATH_MAX];
1068
1069         snprintf(dirname, sizeof(dirname),
1070                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
1071                      loc->domain, loc->bus, loc->devid, loc->function);
1072
1073         d = opendir(dirname);
1074         if (d)
1075                 closedir(d);
1076
1077         return (d != NULL);
1078 }
1079
1080 /* Extract I/O port numbers from sysfs */
1081 static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
1082 {
1083         char dirname[PATH_MAX];
1084         char filename[PATH_MAX];
1085         unsigned long start, size;
1086         unsigned int uio_num;
1087
1088         if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
1089                 return -1;
1090
1091         /* get portio size */
1092         snprintf(filename, sizeof(filename),
1093                      "%s/portio/port0/size", dirname);
1094         if (parse_sysfs_value(filename, &size) < 0) {
1095                 PMD_INIT_LOG(ERR, "%s(): cannot parse size",
1096                              __func__);
1097                 return -1;
1098         }
1099
1100         /* get portio start */
1101         snprintf(filename, sizeof(filename),
1102                  "%s/portio/port0/start", dirname);
1103         if (parse_sysfs_value(filename, &start) < 0) {
1104                 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
1105                              __func__);
1106                 return -1;
1107         }
1108         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
1109         pci_dev->mem_resource[0].len =  (uint64_t)size;
1110         PMD_INIT_LOG(DEBUG,
1111                      "PCI Port IO found start=0x%lx with size=0x%lx",
1112                      start, size);
1113
1114         /* save fd */
1115         memset(dirname, 0, sizeof(dirname));
1116         snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
1117         pci_dev->intr_handle.fd = open(dirname, O_RDWR);
1118         if (pci_dev->intr_handle.fd < 0) {
1119                 PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
1120                         dirname, strerror(errno));
1121                 return -1;
1122         }
1123
1124         pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
1125         pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
1126
1127         return 0;
1128 }
1129
1130 /* Extract port I/O numbers from proc/ioports */
1131 static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
1132 {
1133         uint16_t start, end;
1134         int size;
1135         FILE *fp;
1136         char *line = NULL;
1137         char pci_id[16];
1138         int found = 0;
1139         size_t linesz;
1140
1141         snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
1142                  pci_dev->addr.domain,
1143                  pci_dev->addr.bus,
1144                  pci_dev->addr.devid,
1145                  pci_dev->addr.function);
1146
1147         fp = fopen("/proc/ioports", "r");
1148         if (fp == NULL) {
1149                 PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
1150                 return -1;
1151         }
1152
1153         while (getdelim(&line, &linesz, '\n', fp) > 0) {
1154                 char *ptr = line;
1155                 char *left;
1156                 int n;
1157
1158                 n = strcspn(ptr, ":");
1159                 ptr[n] = 0;
1160                 left = &ptr[n+1];
1161
1162                 while (*left && isspace(*left))
1163                         left++;
1164
1165                 if (!strncmp(left, pci_id, strlen(pci_id))) {
1166                         found = 1;
1167
1168                         while (*ptr && isspace(*ptr))
1169                                 ptr++;
1170
1171                         sscanf(ptr, "%04hx-%04hx", &start, &end);
1172                         size = end - start + 1;
1173
1174                         break;
1175                 }
1176         }
1177
1178         free(line);
1179         fclose(fp);
1180
1181         if (!found)
1182                 return -1;
1183
1184         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
1185         pci_dev->mem_resource[0].len =  (uint64_t)size;
1186         PMD_INIT_LOG(DEBUG,
1187                 "PCI Port IO found start=0x%x with size=0x%x",
1188                 start, size);
1189
1190         /* can't support lsc interrupt without uio */
1191         pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1192
1193         return 0;
1194 }
1195
1196 /* Extract I/O port numbers from sysfs */
1197 static int virtio_resource_init(struct rte_pci_device *pci_dev)
1198 {
1199         if (virtio_resource_init_by_uio(pci_dev) == 0)
1200                 return 0;
1201         else
1202                 return virtio_resource_init_by_ioports(pci_dev);
1203 }
1204
1205 #else
1206 static int
1207 virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
1208 {
1209         /* nic_uio does not enable interrupts, return 0 (false). */
1210         return 0;
1211 }
1212
1213 static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
1214 {
1215         /* no setup required */
1216         return 0;
1217 }
1218 #endif
1219
1220 /*
1221  * Process Virtio Config changed interrupt and call the callback
1222  * if link state changed.
1223  */
1224 static void
1225 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1226                          void *param)
1227 {
1228         struct rte_eth_dev *dev = param;
1229         struct virtio_hw *hw = dev->data->dev_private;
1230         uint8_t isr;
1231
1232         /* Read interrupt status which clears interrupt */
1233         isr = vtpci_isr(hw);
1234         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1235
1236         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1237                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1238
1239         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1240                 if (virtio_dev_link_update(dev, 0) == 0)
1241                         _rte_eth_dev_callback_process(dev,
1242                                                       RTE_ETH_EVENT_INTR_LSC);
1243         }
1244
1245 }
1246
1247 static void
1248 rx_func_get(struct rte_eth_dev *eth_dev)
1249 {
1250         struct virtio_hw *hw = eth_dev->data->dev_private;
1251         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1252                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1253         else
1254                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1255 }
1256
1257 /*
1258  * This function is based on probe() function in virtio_pci.c
1259  * It returns 0 on success.
1260  */
1261 static int
1262 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1263 {
1264         struct virtio_hw *hw = eth_dev->data->dev_private;
1265         struct virtio_net_config *config;
1266         struct virtio_net_config local_config;
1267         struct rte_pci_device *pci_dev;
1268
1269         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
1270
1271         eth_dev->dev_ops = &virtio_eth_dev_ops;
1272         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1273
1274         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1275                 rx_func_get(eth_dev);
1276                 return 0;
1277         }
1278
1279         /* Allocate memory for storing MAC addresses */
1280         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1281         if (eth_dev->data->mac_addrs == NULL) {
1282                 PMD_INIT_LOG(ERR,
1283                         "Failed to allocate %d bytes needed to store MAC addresses",
1284                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1285                 return -ENOMEM;
1286         }
1287
1288         pci_dev = eth_dev->pci_dev;
1289
1290         if (virtio_resource_init(pci_dev) < 0)
1291                 return -1;
1292
1293         hw->use_msix = virtio_has_msix(&pci_dev->addr);
1294         hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
1295
1296         /* Reset the device although not necessary at startup */
1297         vtpci_reset(hw);
1298
1299         /* Tell the host we've noticed this device. */
1300         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1301
1302         /* Tell the host we've known how to drive the device. */
1303         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1304         virtio_negotiate_features(hw);
1305
1306         /* If host does not support status then disable LSC */
1307         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1308                 pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1309
1310         rte_eth_copy_pci_info(eth_dev, pci_dev);
1311
1312         rx_func_get(eth_dev);
1313
1314         /* Setting up rx_header size for the device */
1315         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1316                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1317         else
1318                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1319
1320         /* Copy the permanent MAC address to: virtio_hw */
1321         virtio_get_hwaddr(hw);
1322         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1323                         &eth_dev->data->mac_addrs[0]);
1324         PMD_INIT_LOG(DEBUG,
1325                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1326                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1327                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1328
1329         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1330                 config = &local_config;
1331
1332                 vtpci_read_dev_config(hw,
1333                         offsetof(struct virtio_net_config, mac),
1334                         &config->mac, sizeof(config->mac));
1335
1336                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1337                         vtpci_read_dev_config(hw,
1338                                 offsetof(struct virtio_net_config, status),
1339                                 &config->status, sizeof(config->status));
1340                 } else {
1341                         PMD_INIT_LOG(DEBUG,
1342                                      "VIRTIO_NET_F_STATUS is not supported");
1343                         config->status = 0;
1344                 }
1345
1346                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1347                         vtpci_read_dev_config(hw,
1348                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1349                                 &config->max_virtqueue_pairs,
1350                                 sizeof(config->max_virtqueue_pairs));
1351                 } else {
1352                         PMD_INIT_LOG(DEBUG,
1353                                      "VIRTIO_NET_F_MQ is not supported");
1354                         config->max_virtqueue_pairs = 1;
1355                 }
1356
1357                 hw->max_rx_queues =
1358                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1359                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1360                 hw->max_tx_queues =
1361                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1362                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1363
1364                 virtio_dev_cq_queue_setup(eth_dev,
1365                                         config->max_virtqueue_pairs * 2,
1366                                         SOCKET_ID_ANY);
1367
1368                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1369                                 config->max_virtqueue_pairs);
1370                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1371                 PMD_INIT_LOG(DEBUG,
1372                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1373                                 config->mac[0], config->mac[1],
1374                                 config->mac[2], config->mac[3],
1375                                 config->mac[4], config->mac[5]);
1376         } else {
1377                 hw->max_rx_queues = 1;
1378                 hw->max_tx_queues = 1;
1379         }
1380
1381         eth_dev->data->nb_rx_queues = hw->max_rx_queues;
1382         eth_dev->data->nb_tx_queues = hw->max_tx_queues;
1383
1384         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1385                         hw->max_rx_queues, hw->max_tx_queues);
1386         PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1387                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1388                         pci_dev->id.device_id);
1389
1390         /* Setup interrupt callback  */
1391         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1392                 rte_intr_callback_register(&pci_dev->intr_handle,
1393                                    virtio_interrupt_handler, eth_dev);
1394
1395         virtio_dev_cq_start(eth_dev);
1396
1397         return 0;
1398 }
1399
1400 static int
1401 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1402 {
1403         struct rte_pci_device *pci_dev;
1404         struct virtio_hw *hw = eth_dev->data->dev_private;
1405
1406         PMD_INIT_FUNC_TRACE();
1407
1408         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1409                 return -EPERM;
1410
1411         if (hw->started == 1) {
1412                 virtio_dev_stop(eth_dev);
1413                 virtio_dev_close(eth_dev);
1414         }
1415         pci_dev = eth_dev->pci_dev;
1416
1417         eth_dev->dev_ops = NULL;
1418         eth_dev->tx_pkt_burst = NULL;
1419         eth_dev->rx_pkt_burst = NULL;
1420
1421         virtio_dev_queue_release(hw->cvq);
1422
1423         rte_free(eth_dev->data->mac_addrs);
1424         eth_dev->data->mac_addrs = NULL;
1425
1426         /* reset interrupt callback  */
1427         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1428                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1429                                                 virtio_interrupt_handler,
1430                                                 eth_dev);
1431
1432         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1433
1434         return 0;
1435 }
1436
1437 static struct eth_driver rte_virtio_pmd = {
1438         .pci_drv = {
1439                 .name = "rte_virtio_pmd",
1440                 .id_table = pci_id_virtio_map,
1441                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1442         },
1443         .eth_dev_init = eth_virtio_dev_init,
1444         .eth_dev_uninit = eth_virtio_dev_uninit,
1445         .dev_private_size = sizeof(struct virtio_hw),
1446 };
1447
1448 /*
1449  * Driver initialization routine.
1450  * Invoked once at EAL init time.
1451  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1452  * Returns 0 on success.
1453  */
1454 static int
1455 rte_virtio_pmd_init(const char *name __rte_unused,
1456                     const char *param __rte_unused)
1457 {
1458         if (rte_eal_iopl_init() != 0) {
1459                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1460                 return -1;
1461         }
1462
1463         rte_eth_driver_register(&rte_virtio_pmd);
1464         return 0;
1465 }
1466
1467 /*
1468  * Configure virtio device
1469  * It returns 0 on success.
1470  */
1471 static int
1472 virtio_dev_configure(struct rte_eth_dev *dev)
1473 {
1474         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1475         struct virtio_hw *hw = dev->data->dev_private;
1476         struct rte_pci_device *pci_dev = dev->pci_dev;
1477
1478         PMD_INIT_LOG(DEBUG, "configure");
1479
1480         if (rxmode->hw_ip_checksum) {
1481                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1482                 return (-EINVAL);
1483         }
1484
1485         hw->vlan_strip = rxmode->hw_vlan_strip;
1486
1487         if (rxmode->hw_vlan_filter
1488             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1489                 PMD_DRV_LOG(NOTICE,
1490                             "vlan filtering not available on this host");
1491                 return -ENOTSUP;
1492         }
1493
1494         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1495                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1496                         PMD_DRV_LOG(ERR, "failed to set config vector");
1497                         return -EBUSY;
1498                 }
1499
1500         return 0;
1501 }
1502
1503
1504 static int
1505 virtio_dev_start(struct rte_eth_dev *dev)
1506 {
1507         uint16_t nb_queues, i;
1508         struct virtio_hw *hw = dev->data->dev_private;
1509         struct rte_pci_device *pci_dev = dev->pci_dev;
1510
1511         /* check if lsc interrupt feature is enabled */
1512         if (dev->data->dev_conf.intr_conf.lsc) {
1513                 if (!(pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
1514                         PMD_DRV_LOG(ERR, "link status not supported by host");
1515                         return -ENOTSUP;
1516                 }
1517
1518                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1519                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1520                         return -EIO;
1521                 }
1522         }
1523
1524         /* Initialize Link state */
1525         virtio_dev_link_update(dev, 0);
1526
1527         /* On restart after stop do not touch queues */
1528         if (hw->started)
1529                 return 0;
1530
1531         /* Do final configuration before rx/tx engine starts */
1532         virtio_dev_rxtx_start(dev);
1533         vtpci_reinit_complete(hw);
1534
1535         hw->started = 1;
1536
1537         /*Notify the backend
1538          *Otherwise the tap backend might already stop its queue due to fullness.
1539          *vhost backend will have no chance to be waked up
1540          */
1541         nb_queues = dev->data->nb_rx_queues;
1542         if (nb_queues > 1) {
1543                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1544                         return -EINVAL;
1545         }
1546
1547         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1548
1549         for (i = 0; i < nb_queues; i++)
1550                 virtqueue_notify(dev->data->rx_queues[i]);
1551
1552         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1553
1554         for (i = 0; i < dev->data->nb_rx_queues; i++)
1555                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1556
1557         for (i = 0; i < dev->data->nb_tx_queues; i++)
1558                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1559
1560         return 0;
1561 }
1562
1563 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1564 {
1565         struct rte_mbuf *buf;
1566         int i, mbuf_num = 0;
1567
1568         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1569                 PMD_INIT_LOG(DEBUG,
1570                              "Before freeing rxq[%d] used and unused buf", i);
1571                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1572
1573                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p",
1574                                 i, dev->data->rx_queues[i]);
1575                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1576                                         dev->data->rx_queues[i])) != NULL) {
1577                         rte_pktmbuf_free(buf);
1578                         mbuf_num++;
1579                 }
1580
1581                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1582                 PMD_INIT_LOG(DEBUG,
1583                              "After freeing rxq[%d] used and unused buf", i);
1584                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1585         }
1586
1587         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1588                 PMD_INIT_LOG(DEBUG,
1589                              "Before freeing txq[%d] used and unused bufs",
1590                              i);
1591                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1592
1593                 mbuf_num = 0;
1594                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1595                                         dev->data->tx_queues[i])) != NULL) {
1596                         rte_pktmbuf_free(buf);
1597
1598                         mbuf_num++;
1599                 }
1600
1601                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1602                 PMD_INIT_LOG(DEBUG,
1603                              "After freeing txq[%d] used and unused buf", i);
1604                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1605         }
1606 }
1607
1608 /*
1609  * Stop device: disable interrupt and mark link down
1610  */
1611 static void
1612 virtio_dev_stop(struct rte_eth_dev *dev)
1613 {
1614         struct rte_eth_link link;
1615
1616         PMD_INIT_LOG(DEBUG, "stop");
1617
1618         if (dev->data->dev_conf.intr_conf.lsc)
1619                 rte_intr_disable(&dev->pci_dev->intr_handle);
1620
1621         memset(&link, 0, sizeof(link));
1622         virtio_dev_atomic_write_link_status(dev, &link);
1623 }
1624
1625 static int
1626 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1627 {
1628         struct rte_eth_link link, old;
1629         uint16_t status;
1630         struct virtio_hw *hw = dev->data->dev_private;
1631         memset(&link, 0, sizeof(link));
1632         virtio_dev_atomic_read_link_status(dev, &link);
1633         old = link;
1634         link.link_duplex = FULL_DUPLEX;
1635         link.link_speed  = SPEED_10G;
1636
1637         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1638                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1639                 vtpci_read_dev_config(hw,
1640                                 offsetof(struct virtio_net_config, status),
1641                                 &status, sizeof(status));
1642                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1643                         link.link_status = 0;
1644                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1645                                      dev->data->port_id);
1646                 } else {
1647                         link.link_status = 1;
1648                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1649                                      dev->data->port_id);
1650                 }
1651         } else {
1652                 link.link_status = 1;   /* Link up */
1653         }
1654         virtio_dev_atomic_write_link_status(dev, &link);
1655
1656         return (old.link_status == link.link_status) ? -1 : 0;
1657 }
1658
1659 static void
1660 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1661 {
1662         struct virtio_hw *hw = dev->data->dev_private;
1663
1664         dev_info->driver_name = dev->driver->pci_drv.name;
1665         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1666         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1667         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1668         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1669         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1670         dev_info->default_txconf = (struct rte_eth_txconf) {
1671                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1672         };
1673 }
1674
1675 /*
1676  * It enables testpmd to collect per queue stats.
1677  */
1678 static int
1679 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1680 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1681 __rte_unused uint8_t is_rx)
1682 {
1683         return 0;
1684 }
1685
1686 static struct rte_driver rte_virtio_driver = {
1687         .type = PMD_PDEV,
1688         .init = rte_virtio_pmd_init,
1689 };
1690
1691 PMD_REGISTER_DRIVER(rte_virtio_driver);