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->queue_id);
 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         dev->data->rx_mbuf_alloc_failed = 0;
 793 }
 794
 795 static void
 796 virtio_set_hwaddr(struct virtio_hw *hw)
 797 {
 798         vtpci_write_dev_config(hw,
 799                         offsetof(struct virtio_net_config, mac),
 800                         &hw->mac_addr, ETHER_ADDR_LEN);
 801 }
 802
 803 static void
 804 virtio_get_hwaddr(struct virtio_hw *hw)
 805 {
 806         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 807                 vtpci_read_dev_config(hw,
 808                         offsetof(struct virtio_net_config, mac),
 809                         &hw->mac_addr, ETHER_ADDR_LEN);
 810         } else {
 811                 eth_random_addr(&hw->mac_addr[0]);
 812                 virtio_set_hwaddr(hw);
 813         }
 814 }
 815
 816 static void
 817 virtio_mac_table_set(struct virtio_hw *hw,
 818                      const struct virtio_net_ctrl_mac *uc,
 819                      const struct virtio_net_ctrl_mac *mc)
 820 {
 821         struct virtio_pmd_ctrl ctrl;
 822         int err, len[2];
 823
 824         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 825                 PMD_DRV_LOG(INFO, "host does not support mac table\n");
 826                 return;
 827         }
 828
 829         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 830         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 831
 832         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 833         memcpy(ctrl.data, uc, len[0]);
 834
 835         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 836         memcpy(ctrl.data + len[0], mc, len[1]);
 837
 838         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 839         if (err != 0)
 840                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 841 }
 842
 843 static void
 844 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 845                     uint32_t index, uint32_t vmdq __rte_unused)
 846 {
 847         struct virtio_hw *hw = dev->data->dev_private;
 848         const struct ether_addr *addrs = dev->data->mac_addrs;
 849         unsigned int i;
 850         struct virtio_net_ctrl_mac *uc, *mc;
 851
 852         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 853                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 854                 return;
 855         }
 856
 857         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 858         uc->entries = 0;
 859         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 860         mc->entries = 0;
 861
 862         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 863                 const struct ether_addr *addr
 864                         = (i == index) ? mac_addr : addrs + i;
 865                 struct virtio_net_ctrl_mac *tbl
 866                         = is_multicast_ether_addr(addr) ? mc : uc;
 867
 868                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 869         }
 870
 871         virtio_mac_table_set(hw, uc, mc);
 872 }
 873
 874 static void
 875 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 876 {
 877         struct virtio_hw *hw = dev->data->dev_private;
 878         struct ether_addr *addrs = dev->data->mac_addrs;
 879         struct virtio_net_ctrl_mac *uc, *mc;
 880         unsigned int i;
 881
 882         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 883                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 884                 return;
 885         }
 886
 887         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 888         uc->entries = 0;
 889         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 890         mc->entries = 0;
 891
 892         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 893                 struct virtio_net_ctrl_mac *tbl;
 894
 895                 if (i == index || is_zero_ether_addr(addrs + i))
 896                         continue;
 897
 898                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
 899                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
 900         }
 901
 902         virtio_mac_table_set(hw, uc, mc);
 903 }
 904
 905 static void
 906 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
 907 {
 908         struct virtio_hw *hw = dev->data->dev_private;
 909
 910         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
 911
 912         /* Use atomic update if available */
 913         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 914                 struct virtio_pmd_ctrl ctrl;
 915                 int len = ETHER_ADDR_LEN;
 916
 917                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 918                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
 919
 920                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
 921                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
 922         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
 923                 virtio_set_hwaddr(hw);
 924 }
 925
 926 static int
 927 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 928 {
 929         struct virtio_hw *hw = dev->data->dev_private;
 930         struct virtio_pmd_ctrl ctrl;
 931         int len;
 932
 933         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
 934                 return -ENOTSUP;
 935
 936         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
 937         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
 938         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
 939         len = sizeof(vlan_id);
 940
 941         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
 942 }
 943
 944 static void
 945 virtio_negotiate_features(struct virtio_hw *hw)
 946 {
 947         uint32_t host_features;
 948
 949         /* Prepare guest_features: feature that driver wants to support */
 950         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
 951         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
 952                 hw->guest_features);
 953
 954         /* Read device(host) feature bits */
 955         host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
 956         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
 957                 host_features);
 958
 959         /*
 960          * Negotiate features: Subset of device feature bits are written back
 961          * guest feature bits.
 962          */
 963         hw->guest_features = vtpci_negotiate_features(hw, host_features);
 964         PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
 965                 hw->guest_features);
 966 }
 967
 968 #ifdef RTE_EXEC_ENV_LINUXAPP
 969 static int
 970 parse_sysfs_value(const char *filename, unsigned long *val)
 971 {
 972         FILE *f;
 973         char buf[BUFSIZ];
 974         char *end = NULL;
 975
 976         f = fopen(filename, "r");
 977         if (f == NULL) {
 978                 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
 979                              __func__, filename);
 980                 return -1;
 981         }
 982
 983         if (fgets(buf, sizeof(buf), f) == NULL) {
 984                 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
 985                              __func__, filename);
 986                 fclose(f);
 987                 return -1;
 988         }
 989         *val = strtoul(buf, &end, 0);
 990         if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
 991                 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
 992                              __func__, filename);
 993                 fclose(f);
 994                 return -1;
 995         }
 996         fclose(f);
 997         return 0;
 998 }
 999
1000 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen,
1001                         unsigned int *uio_num)
1002 {
1003         struct dirent *e;
1004         DIR *dir;
1005         char dirname[PATH_MAX];
1006
1007         /* depending on kernel version, uio can be located in uio/uioX
1008          * or uio:uioX */
1009         snprintf(dirname, sizeof(dirname),
1010                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
1011                      loc->domain, loc->bus, loc->devid, loc->function);
1012         dir = opendir(dirname);
1013         if (dir == NULL) {
1014                 /* retry with the parent directory */
1015                 snprintf(dirname, sizeof(dirname),
1016                              SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
1017                              loc->domain, loc->bus, loc->devid, loc->function);
1018                 dir = opendir(dirname);
1019
1020                 if (dir == NULL) {
1021                         PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
1022                         return -1;
1023                 }
1024         }
1025
1026         /* take the first file starting with "uio" */
1027         while ((e = readdir(dir)) != NULL) {
1028                 /* format could be uio%d ...*/
1029                 int shortprefix_len = sizeof("uio") - 1;
1030                 /* ... or uio:uio%d */
1031                 int longprefix_len = sizeof("uio:uio") - 1;
1032                 char *endptr;
1033
1034                 if (strncmp(e->d_name, "uio", 3) != 0)
1035                         continue;
1036
1037                 /* first try uio%d */
1038                 errno = 0;
1039                 *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
1040                 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
1041                         snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num);
1042                         break;
1043                 }
1044
1045                 /* then try uio:uio%d */
1046                 errno = 0;
1047                 *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
1048                 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
1049                         snprintf(buf, buflen, "%s/uio:uio%u", dirname,
1050                                      *uio_num);
1051                         break;
1052                 }
1053         }
1054         closedir(dir);
1055
1056         /* No uio resource found */
1057         if (e == NULL) {
1058                 PMD_INIT_LOG(ERR, "Could not find uio resource");
1059                 return -1;
1060         }
1061
1062         return 0;
1063 }
1064
1065 static int
1066 virtio_has_msix(const struct rte_pci_addr *loc)
1067 {
1068         DIR *d;
1069         char dirname[PATH_MAX];
1070
1071         snprintf(dirname, sizeof(dirname),
1072                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
1073                      loc->domain, loc->bus, loc->devid, loc->function);
1074
1075         d = opendir(dirname);
1076         if (d)
1077                 closedir(d);
1078
1079         return (d != NULL);
1080 }
1081
1082 /* Extract I/O port numbers from sysfs */
1083 static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
1084 {
1085         char dirname[PATH_MAX];
1086         char filename[PATH_MAX];
1087         unsigned long start, size;
1088         unsigned int uio_num;
1089
1090         if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
1091                 return -1;
1092
1093         /* get portio size */
1094         snprintf(filename, sizeof(filename),
1095                      "%s/portio/port0/size", dirname);
1096         if (parse_sysfs_value(filename, &size) < 0) {
1097                 PMD_INIT_LOG(ERR, "%s(): cannot parse size",
1098                              __func__);
1099                 return -1;
1100         }
1101
1102         /* get portio start */
1103         snprintf(filename, sizeof(filename),
1104                  "%s/portio/port0/start", dirname);
1105         if (parse_sysfs_value(filename, &start) < 0) {
1106                 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
1107                              __func__);
1108                 return -1;
1109         }
1110         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
1111         pci_dev->mem_resource[0].len =  (uint64_t)size;
1112         PMD_INIT_LOG(DEBUG,
1113                      "PCI Port IO found start=0x%lx with size=0x%lx",
1114                      start, size);
1115
1116         /* save fd */
1117         memset(dirname, 0, sizeof(dirname));
1118         snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
1119         pci_dev->intr_handle.fd = open(dirname, O_RDWR);
1120         if (pci_dev->intr_handle.fd < 0) {
1121                 PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
1122                         dirname, strerror(errno));
1123                 return -1;
1124         }
1125
1126         pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
1127         pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
1128
1129         return 0;
1130 }
1131
1132 /* Extract port I/O numbers from proc/ioports */
1133 static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
1134 {
1135         uint16_t start, end;
1136         int size;
1137         FILE *fp;
1138         char *line = NULL;
1139         char pci_id[16];
1140         int found = 0;
1141         size_t linesz;
1142
1143         snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
1144                  pci_dev->addr.domain,
1145                  pci_dev->addr.bus,
1146                  pci_dev->addr.devid,
1147                  pci_dev->addr.function);
1148
1149         fp = fopen("/proc/ioports", "r");
1150         if (fp == NULL) {
1151                 PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
1152                 return -1;
1153         }
1154
1155         while (getdelim(&line, &linesz, '\n', fp) > 0) {
1156                 char *ptr = line;
1157                 char *left;
1158                 int n;
1159
1160                 n = strcspn(ptr, ":");
1161                 ptr[n] = 0;
1162                 left = &ptr[n+1];
1163
1164                 while (*left && isspace(*left))
1165                         left++;
1166
1167                 if (!strncmp(left, pci_id, strlen(pci_id))) {
1168                         found = 1;
1169
1170                         while (*ptr && isspace(*ptr))
1171                                 ptr++;
1172
1173                         sscanf(ptr, "%04hx-%04hx", &start, &end);
1174                         size = end - start + 1;
1175
1176                         break;
1177                 }
1178         }
1179
1180         free(line);
1181         fclose(fp);
1182
1183         if (!found)
1184                 return -1;
1185
1186         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
1187         pci_dev->mem_resource[0].len =  (uint64_t)size;
1188         PMD_INIT_LOG(DEBUG,
1189                 "PCI Port IO found start=0x%x with size=0x%x",
1190                 start, size);
1191
1192         /* can't support lsc interrupt without uio */
1193         pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1194
1195         return 0;
1196 }
1197
1198 /* Extract I/O port numbers from sysfs */
1199 static int virtio_resource_init(struct rte_pci_device *pci_dev)
1200 {
1201         if (virtio_resource_init_by_uio(pci_dev) == 0)
1202                 return 0;
1203         else
1204                 return virtio_resource_init_by_ioports(pci_dev);
1205 }
1206
1207 #else
1208 static int
1209 virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
1210 {
1211         /* nic_uio does not enable interrupts, return 0 (false). */
1212         return 0;
1213 }
1214
1215 static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
1216 {
1217         /* no setup required */
1218         return 0;
1219 }
1220 #endif
1221
1222 /*
1223  * Process Virtio Config changed interrupt and call the callback
1224  * if link state changed.
1225  */
1226 static void
1227 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1228                          void *param)
1229 {
1230         struct rte_eth_dev *dev = param;
1231         struct virtio_hw *hw = dev->data->dev_private;
1232         uint8_t isr;
1233
1234         /* Read interrupt status which clears interrupt */
1235         isr = vtpci_isr(hw);
1236         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1237
1238         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1239                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1240
1241         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1242                 if (virtio_dev_link_update(dev, 0) == 0)
1243                         _rte_eth_dev_callback_process(dev,
1244                                                       RTE_ETH_EVENT_INTR_LSC);
1245         }
1246
1247 }
1248
1249 static void
1250 rx_func_get(struct rte_eth_dev *eth_dev)
1251 {
1252         struct virtio_hw *hw = eth_dev->data->dev_private;
1253         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1254                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1255         else
1256                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1257 }
1258
1259 /*
1260  * This function is based on probe() function in virtio_pci.c
1261  * It returns 0 on success.
1262  */
1263 static int
1264 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1265 {
1266         struct virtio_hw *hw = eth_dev->data->dev_private;
1267         struct virtio_net_config *config;
1268         struct virtio_net_config local_config;
1269         struct rte_pci_device *pci_dev;
1270
1271         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
1272
1273         eth_dev->dev_ops = &virtio_eth_dev_ops;
1274         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1275
1276         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1277                 rx_func_get(eth_dev);
1278                 return 0;
1279         }
1280
1281         /* Allocate memory for storing MAC addresses */
1282         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1283         if (eth_dev->data->mac_addrs == NULL) {
1284                 PMD_INIT_LOG(ERR,
1285                         "Failed to allocate %d bytes needed to store MAC addresses",
1286                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1287                 return -ENOMEM;
1288         }
1289
1290         pci_dev = eth_dev->pci_dev;
1291
1292         rte_eth_copy_pci_info(eth_dev, pci_dev);
1293
1294         if (virtio_resource_init(pci_dev) < 0)
1295                 return -1;
1296
1297         hw->use_msix = virtio_has_msix(&pci_dev->addr);
1298         hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
1299
1300         /* Reset the device although not necessary at startup */
1301         vtpci_reset(hw);
1302
1303         /* Tell the host we've noticed this device. */
1304         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1305
1306         /* Tell the host we've known how to drive the device. */
1307         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1308         virtio_negotiate_features(hw);
1309
1310         /* If host does not support status then disable LSC */
1311         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1312                 pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1313
1314         rx_func_get(eth_dev);
1315
1316         /* Setting up rx_header size for the device */
1317         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1318                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1319         else
1320                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1321
1322         /* Copy the permanent MAC address to: virtio_hw */
1323         virtio_get_hwaddr(hw);
1324         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1325                         &eth_dev->data->mac_addrs[0]);
1326         PMD_INIT_LOG(DEBUG,
1327                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1328                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1329                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1330
1331         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1332                 config = &local_config;
1333
1334                 vtpci_read_dev_config(hw,
1335                         offsetof(struct virtio_net_config, mac),
1336                         &config->mac, sizeof(config->mac));
1337
1338                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1339                         vtpci_read_dev_config(hw,
1340                                 offsetof(struct virtio_net_config, status),
1341                                 &config->status, sizeof(config->status));
1342                 } else {
1343                         PMD_INIT_LOG(DEBUG,
1344                                      "VIRTIO_NET_F_STATUS is not supported");
1345                         config->status = 0;
1346                 }
1347
1348                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1349                         vtpci_read_dev_config(hw,
1350                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1351                                 &config->max_virtqueue_pairs,
1352                                 sizeof(config->max_virtqueue_pairs));
1353                 } else {
1354                         PMD_INIT_LOG(DEBUG,
1355                                      "VIRTIO_NET_F_MQ is not supported");
1356                         config->max_virtqueue_pairs = 1;
1357                 }
1358
1359                 hw->max_rx_queues =
1360                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1361                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1362                 hw->max_tx_queues =
1363                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1364                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1365
1366                 virtio_dev_cq_queue_setup(eth_dev,
1367                                         config->max_virtqueue_pairs * 2,
1368                                         SOCKET_ID_ANY);
1369
1370                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1371                                 config->max_virtqueue_pairs);
1372                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1373                 PMD_INIT_LOG(DEBUG,
1374                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1375                                 config->mac[0], config->mac[1],
1376                                 config->mac[2], config->mac[3],
1377                                 config->mac[4], config->mac[5]);
1378         } else {
1379                 hw->max_rx_queues = 1;
1380                 hw->max_tx_queues = 1;
1381         }
1382
1383         eth_dev->data->nb_rx_queues = hw->max_rx_queues;
1384         eth_dev->data->nb_tx_queues = hw->max_tx_queues;
1385
1386         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1387                         hw->max_rx_queues, hw->max_tx_queues);
1388         PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1389                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1390                         pci_dev->id.device_id);
1391
1392         /* Setup interrupt callback  */
1393         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1394                 rte_intr_callback_register(&pci_dev->intr_handle,
1395                                    virtio_interrupt_handler, eth_dev);
1396
1397         virtio_dev_cq_start(eth_dev);
1398
1399         return 0;
1400 }
1401
1402 static int
1403 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1404 {
1405         struct rte_pci_device *pci_dev;
1406         struct virtio_hw *hw = eth_dev->data->dev_private;
1407
1408         PMD_INIT_FUNC_TRACE();
1409
1410         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1411                 return -EPERM;
1412
1413         if (hw->started == 1) {
1414                 virtio_dev_stop(eth_dev);
1415                 virtio_dev_close(eth_dev);
1416         }
1417         pci_dev = eth_dev->pci_dev;
1418
1419         eth_dev->dev_ops = NULL;
1420         eth_dev->tx_pkt_burst = NULL;
1421         eth_dev->rx_pkt_burst = NULL;
1422
1423         virtio_dev_queue_release(hw->cvq);
1424
1425         rte_free(eth_dev->data->mac_addrs);
1426         eth_dev->data->mac_addrs = NULL;
1427
1428         /* reset interrupt callback  */
1429         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1430                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1431                                                 virtio_interrupt_handler,
1432                                                 eth_dev);
1433
1434         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1435
1436         return 0;
1437 }
1438
1439 static struct eth_driver rte_virtio_pmd = {
1440         .pci_drv = {
1441                 .name = "rte_virtio_pmd",
1442                 .id_table = pci_id_virtio_map,
1443                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1444         },
1445         .eth_dev_init = eth_virtio_dev_init,
1446         .eth_dev_uninit = eth_virtio_dev_uninit,
1447         .dev_private_size = sizeof(struct virtio_hw),
1448 };
1449
1450 /*
1451  * Driver initialization routine.
1452  * Invoked once at EAL init time.
1453  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1454  * Returns 0 on success.
1455  */
1456 static int
1457 rte_virtio_pmd_init(const char *name __rte_unused,
1458                     const char *param __rte_unused)
1459 {
1460         if (rte_eal_iopl_init() != 0) {
1461                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1462                 return -1;
1463         }
1464
1465         rte_eth_driver_register(&rte_virtio_pmd);
1466         return 0;
1467 }
1468
1469 /*
1470  * Configure virtio device
1471  * It returns 0 on success.
1472  */
1473 static int
1474 virtio_dev_configure(struct rte_eth_dev *dev)
1475 {
1476         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1477         struct virtio_hw *hw = dev->data->dev_private;
1478         struct rte_pci_device *pci_dev = dev->pci_dev;
1479
1480         PMD_INIT_LOG(DEBUG, "configure");
1481
1482         if (rxmode->hw_ip_checksum) {
1483                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1484                 return (-EINVAL);
1485         }
1486
1487         hw->vlan_strip = rxmode->hw_vlan_strip;
1488
1489         if (rxmode->hw_vlan_filter
1490             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1491                 PMD_DRV_LOG(NOTICE,
1492                             "vlan filtering not available on this host");
1493                 return -ENOTSUP;
1494         }
1495
1496         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1497                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1498                         PMD_DRV_LOG(ERR, "failed to set config vector");
1499                         return -EBUSY;
1500                 }
1501
1502         return 0;
1503 }
1504
1505
1506 static int
1507 virtio_dev_start(struct rte_eth_dev *dev)
1508 {
1509         uint16_t nb_queues, i;
1510         struct virtio_hw *hw = dev->data->dev_private;
1511         struct rte_pci_device *pci_dev = dev->pci_dev;
1512
1513         /* check if lsc interrupt feature is enabled */
1514         if (dev->data->dev_conf.intr_conf.lsc) {
1515                 if (!(pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
1516                         PMD_DRV_LOG(ERR, "link status not supported by host");
1517                         return -ENOTSUP;
1518                 }
1519
1520                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1521                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1522                         return -EIO;
1523                 }
1524         }
1525
1526         /* Initialize Link state */
1527         virtio_dev_link_update(dev, 0);
1528
1529         /* On restart after stop do not touch queues */
1530         if (hw->started)
1531                 return 0;
1532
1533         /* Do final configuration before rx/tx engine starts */
1534         virtio_dev_rxtx_start(dev);
1535         vtpci_reinit_complete(hw);
1536
1537         hw->started = 1;
1538
1539         /*Notify the backend
1540          *Otherwise the tap backend might already stop its queue due to fullness.
1541          *vhost backend will have no chance to be waked up
1542          */
1543         nb_queues = dev->data->nb_rx_queues;
1544         if (nb_queues > 1) {
1545                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1546                         return -EINVAL;
1547         }
1548
1549         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1550
1551         for (i = 0; i < nb_queues; i++)
1552                 virtqueue_notify(dev->data->rx_queues[i]);
1553
1554         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1555
1556         for (i = 0; i < dev->data->nb_rx_queues; i++)
1557                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1558
1559         for (i = 0; i < dev->data->nb_tx_queues; i++)
1560                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1561
1562         return 0;
1563 }
1564
1565 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1566 {
1567         struct rte_mbuf *buf;
1568         int i, mbuf_num = 0;
1569
1570         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1571                 PMD_INIT_LOG(DEBUG,
1572                              "Before freeing rxq[%d] used and unused buf", i);
1573                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1574
1575                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p",
1576                                 i, dev->data->rx_queues[i]);
1577                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1578                                         dev->data->rx_queues[i])) != NULL) {
1579                         rte_pktmbuf_free(buf);
1580                         mbuf_num++;
1581                 }
1582
1583                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1584                 PMD_INIT_LOG(DEBUG,
1585                              "After freeing rxq[%d] used and unused buf", i);
1586                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1587         }
1588
1589         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1590                 PMD_INIT_LOG(DEBUG,
1591                              "Before freeing txq[%d] used and unused bufs",
1592                              i);
1593                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1594
1595                 mbuf_num = 0;
1596                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1597                                         dev->data->tx_queues[i])) != NULL) {
1598                         rte_pktmbuf_free(buf);
1599
1600                         mbuf_num++;
1601                 }
1602
1603                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1604                 PMD_INIT_LOG(DEBUG,
1605                              "After freeing txq[%d] used and unused buf", i);
1606                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1607         }
1608 }
1609
1610 /*
1611  * Stop device: disable interrupt and mark link down
1612  */
1613 static void
1614 virtio_dev_stop(struct rte_eth_dev *dev)
1615 {
1616         struct rte_eth_link link;
1617
1618         PMD_INIT_LOG(DEBUG, "stop");
1619
1620         if (dev->data->dev_conf.intr_conf.lsc)
1621                 rte_intr_disable(&dev->pci_dev->intr_handle);
1622
1623         memset(&link, 0, sizeof(link));
1624         virtio_dev_atomic_write_link_status(dev, &link);
1625 }
1626
1627 static int
1628 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1629 {
1630         struct rte_eth_link link, old;
1631         uint16_t status;
1632         struct virtio_hw *hw = dev->data->dev_private;
1633         memset(&link, 0, sizeof(link));
1634         virtio_dev_atomic_read_link_status(dev, &link);
1635         old = link;
1636         link.link_duplex = FULL_DUPLEX;
1637         link.link_speed  = SPEED_10G;
1638
1639         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1640                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1641                 vtpci_read_dev_config(hw,
1642                                 offsetof(struct virtio_net_config, status),
1643                                 &status, sizeof(status));
1644                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1645                         link.link_status = 0;
1646                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1647                                      dev->data->port_id);
1648                 } else {
1649                         link.link_status = 1;
1650                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1651                                      dev->data->port_id);
1652                 }
1653         } else {
1654                 link.link_status = 1;   /* Link up */
1655         }
1656         virtio_dev_atomic_write_link_status(dev, &link);
1657
1658         return (old.link_status == link.link_status) ? -1 : 0;
1659 }
1660
1661 static void
1662 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1663 {
1664         struct virtio_hw *hw = dev->data->dev_private;
1665
1666         dev_info->driver_name = dev->driver->pci_drv.name;
1667         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1668         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1669         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1670         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1671         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1672         dev_info->default_txconf = (struct rte_eth_txconf) {
1673                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1674         };
1675 }
1676
1677 /*
1678  * It enables testpmd to collect per queue stats.
1679  */
1680 static int
1681 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1682 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1683 __rte_unused uint8_t is_rx)
1684 {
1685         return 0;
1686 }
1687
1688 static struct rte_driver rte_virtio_driver = {
1689         .type = PMD_PDEV,
1690         .init = rte_virtio_pmd_init,
1691 };
1692
1693 PMD_REGISTER_DRIVER(rte_virtio_driver);