drivers/net/virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 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
  40 #include <rte_ethdev.h>
  41 #include <rte_memcpy.h>
  42 #include <rte_string_fns.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_atomic.h>
  46 #include <rte_branch_prediction.h>
  47 #include <rte_pci.h>
  48 #include <rte_ether.h>
  49 #include <rte_common.h>
  50 #include <rte_errno.h>
  51
  52 #include <rte_memory.h>
  53 #include <rte_eal.h>
  54 #include <rte_dev.h>
  55
  56 #include "virtio_ethdev.h"
  57 #include "virtio_pci.h"
  58 #include "virtio_logs.h"
  59 #include "virtqueue.h"
  60 #include "virtio_rxtx.h"
  61
  62 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  63 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  64 static int  virtio_dev_start(struct rte_eth_dev *dev);
  65 static void virtio_dev_stop(struct rte_eth_dev *dev);
  66 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  67 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  68 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  69 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  70 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  71                                 struct rte_eth_dev_info *dev_info);
  72 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  73         __rte_unused int wait_to_complete);
  74
  75 static void virtio_set_hwaddr(struct virtio_hw *hw);
  76 static void virtio_get_hwaddr(struct virtio_hw *hw);
  77
  78 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  79                                  struct rte_eth_stats *stats);
  80 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  81                                  struct rte_eth_xstat *xstats, unsigned n);
  82 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  83                                        struct rte_eth_xstat_name *xstats_names,
  84                                        unsigned limit);
  85 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  86 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  87 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  88                                 uint16_t vlan_id, int on);
  89 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  90                                 struct ether_addr *mac_addr,
  91                                 uint32_t index, uint32_t vmdq __rte_unused);
  92 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  93 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  94                                 struct ether_addr *mac_addr);
  95
  96 static int virtio_dev_queue_stats_mapping_set(
  97         __rte_unused struct rte_eth_dev *eth_dev,
  98         __rte_unused uint16_t queue_id,
  99         __rte_unused uint8_t stat_idx,
 100         __rte_unused uint8_t is_rx);
 101
 102 /*
 103  * The set of PCI devices this driver supports
 104  */
 105 static const struct rte_pci_id pci_id_virtio_map[] = {
 106         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
 107         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 108         { .vendor_id = 0, /* sentinel */ },
 109 };
 110
 111 struct rte_virtio_xstats_name_off {
 112         char name[RTE_ETH_XSTATS_NAME_SIZE];
 113         unsigned offset;
 114 };
 115
 116 /* [rt]x_qX_ is prepended to the name string here */
 117 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 118         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 119         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 120         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 121         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 122         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 123         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 124         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 125         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 126         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 127         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 128         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 129         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 130         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 131 };
 132
 133 /* [rt]x_qX_ is prepended to the name string here */
 134 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 135         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 136         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 137         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 138         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 139         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 140         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 141         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 142         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 143         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 144         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 145         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 146         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 147         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 148 };
 149
 150 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 151                             sizeof(rte_virtio_rxq_stat_strings[0]))
 152 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 153                             sizeof(rte_virtio_txq_stat_strings[0]))
 154
 155 static int
 156 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 157                 int *dlen, int pkt_num)
 158 {
 159         uint32_t head, i;
 160         int k, sum = 0;
 161         virtio_net_ctrl_ack status = ~0;
 162         struct virtio_pmd_ctrl result;
 163         struct virtqueue *vq;
 164
 165         ctrl->status = status;
 166
 167         if (!cvq || !cvq->vq) {
 168                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 169                 return -1;
 170         }
 171         vq = cvq->vq;
 172         head = vq->vq_desc_head_idx;
 173
 174         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 175                 "vq->hw->cvq = %p vq = %p",
 176                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 177
 178         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 179                 return -1;
 180
 181         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 182                 sizeof(struct virtio_pmd_ctrl));
 183
 184         /*
 185          * Format is enforced in qemu code:
 186          * One TX packet for header;
 187          * At least one TX packet per argument;
 188          * One RX packet for ACK.
 189          */
 190         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 191         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 192         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 193         vq->vq_free_cnt--;
 194         i = vq->vq_ring.desc[head].next;
 195
 196         for (k = 0; k < pkt_num; k++) {
 197                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 198                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 199                         + sizeof(struct virtio_net_ctrl_hdr)
 200                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 201                 vq->vq_ring.desc[i].len = dlen[k];
 202                 sum += dlen[k];
 203                 vq->vq_free_cnt--;
 204                 i = vq->vq_ring.desc[i].next;
 205         }
 206
 207         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 208         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 209                         + sizeof(struct virtio_net_ctrl_hdr);
 210         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 211         vq->vq_free_cnt--;
 212
 213         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 214
 215         vq_update_avail_ring(vq, head);
 216         vq_update_avail_idx(vq);
 217
 218         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 219
 220         virtqueue_notify(vq);
 221
 222         rte_rmb();
 223         while (VIRTQUEUE_NUSED(vq) == 0) {
 224                 rte_rmb();
 225                 usleep(100);
 226         }
 227
 228         while (VIRTQUEUE_NUSED(vq)) {
 229                 uint32_t idx, desc_idx, used_idx;
 230                 struct vring_used_elem *uep;
 231
 232                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 233                                 & (vq->vq_nentries - 1));
 234                 uep = &vq->vq_ring.used->ring[used_idx];
 235                 idx = (uint32_t) uep->id;
 236                 desc_idx = idx;
 237
 238                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 239                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 240                         vq->vq_free_cnt++;
 241                 }
 242
 243                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 244                 vq->vq_desc_head_idx = idx;
 245
 246                 vq->vq_used_cons_idx++;
 247                 vq->vq_free_cnt++;
 248         }
 249
 250         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 251                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 252
 253         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
 254                         sizeof(struct virtio_pmd_ctrl));
 255
 256         return result.status;
 257 }
 258
 259 static int
 260 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 261 {
 262         struct virtio_hw *hw = dev->data->dev_private;
 263         struct virtio_pmd_ctrl ctrl;
 264         int dlen[1];
 265         int ret;
 266
 267         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 268         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 269         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 270
 271         dlen[0] = sizeof(uint16_t);
 272
 273         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 274         if (ret) {
 275                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 276                           "failed, this is too late now...");
 277                 return -EINVAL;
 278         }
 279
 280         return 0;
 281 }
 282
 283 static void
 284 virtio_dev_queue_release(void *queue __rte_unused)
 285 {
 286         /* do nothing */
 287 }
 288
 289 static int
 290 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
 291 {
 292         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
 293                 return VTNET_CQ;
 294         else if (vtpci_queue_idx % 2 == 0)
 295                 return VTNET_RQ;
 296         else
 297                 return VTNET_TQ;
 298 }
 299
 300 static uint16_t
 301 virtio_get_nr_vq(struct virtio_hw *hw)
 302 {
 303         uint16_t nr_vq = hw->max_queue_pairs * 2;
 304
 305         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 306                 nr_vq += 1;
 307
 308         return nr_vq;
 309 }
 310
 311 static int
 312 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 313 {
 314         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 315         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 316         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 317         unsigned int vq_size, size;
 318         struct virtio_hw *hw = dev->data->dev_private;
 319         struct virtnet_rx *rxvq = NULL;
 320         struct virtnet_tx *txvq = NULL;
 321         struct virtnet_ctl *cvq = NULL;
 322         struct virtqueue *vq;
 323         size_t sz_hdr_mz = 0;
 324         void *sw_ring = NULL;
 325         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 326         int ret;
 327
 328         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 329
 330         /*
 331          * Read the virtqueue size from the Queue Size field
 332          * Always power of 2 and if 0 virtqueue does not exist
 333          */
 334         vq_size = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx);
 335         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 336         if (vq_size == 0) {
 337                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 338                 return -EINVAL;
 339         }
 340
 341         if (!rte_is_power_of_2(vq_size)) {
 342                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 343                 return -EINVAL;
 344         }
 345
 346         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 347                  dev->data->port_id, vtpci_queue_idx);
 348
 349         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 350                                 vq_size * sizeof(struct vq_desc_extra),
 351                                 RTE_CACHE_LINE_SIZE);
 352         if (queue_type == VTNET_TQ) {
 353                 /*
 354                  * For each xmit packet, allocate a virtio_net_hdr
 355                  * and indirect ring elements
 356                  */
 357                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 358         } else if (queue_type == VTNET_CQ) {
 359                 /* Allocate a page for control vq command, data and status */
 360                 sz_hdr_mz = PAGE_SIZE;
 361         }
 362
 363         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 364                                 SOCKET_ID_ANY);
 365         if (vq == NULL) {
 366                 PMD_INIT_LOG(ERR, "can not allocate vq");
 367                 return -ENOMEM;
 368         }
 369         hw->vqs[vtpci_queue_idx] = vq;
 370
 371         vq->hw = hw;
 372         vq->vq_queue_index = vtpci_queue_idx;
 373         vq->vq_nentries = vq_size;
 374         vq->vq_free_cnt = vq_size;
 375
 376         /*
 377          * Reserve a memzone for vring elements
 378          */
 379         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 380         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 381         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 382                      size, vq->vq_ring_size);
 383
 384         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 385                                          SOCKET_ID_ANY,
 386                                          0, VIRTIO_PCI_VRING_ALIGN);
 387         if (mz == NULL) {
 388                 if (rte_errno == EEXIST)
 389                         mz = rte_memzone_lookup(vq_name);
 390                 if (mz == NULL) {
 391                         ret = -ENOMEM;
 392                         goto fail_q_alloc;
 393                 }
 394         }
 395
 396         memset(mz->addr, 0, sizeof(mz->len));
 397
 398         vq->vq_ring_mem = mz->phys_addr;
 399         vq->vq_ring_virt_mem = mz->addr;
 400         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 401                      (uint64_t)mz->phys_addr);
 402         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 403                      (uint64_t)(uintptr_t)mz->addr);
 404
 405         if (sz_hdr_mz) {
 406                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 407                          dev->data->port_id, vtpci_queue_idx);
 408                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 409                                                      SOCKET_ID_ANY, 0,
 410                                                      RTE_CACHE_LINE_SIZE);
 411                 if (hdr_mz == NULL) {
 412                         if (rte_errno == EEXIST)
 413                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 414                         if (hdr_mz == NULL) {
 415                                 ret = -ENOMEM;
 416                                 goto fail_q_alloc;
 417                         }
 418                 }
 419         }
 420
 421         if (queue_type == VTNET_RQ) {
 422                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 423                                sizeof(vq->sw_ring[0]);
 424
 425                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 426                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 427                 if (!sw_ring) {
 428                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 429                         ret = -ENOMEM;
 430                         goto fail_q_alloc;
 431                 }
 432
 433                 vq->sw_ring = sw_ring;
 434                 rxvq = &vq->rxq;
 435                 rxvq->vq = vq;
 436                 rxvq->port_id = dev->data->port_id;
 437                 rxvq->mz = mz;
 438         } else if (queue_type == VTNET_TQ) {
 439                 txvq = &vq->txq;
 440                 txvq->vq = vq;
 441                 txvq->port_id = dev->data->port_id;
 442                 txvq->mz = mz;
 443                 txvq->virtio_net_hdr_mz = hdr_mz;
 444                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 445         } else if (queue_type == VTNET_CQ) {
 446                 cvq = &vq->cq;
 447                 cvq->vq = vq;
 448                 cvq->mz = mz;
 449                 cvq->virtio_net_hdr_mz = hdr_mz;
 450                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 451                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 452
 453                 hw->cvq = cvq;
 454         }
 455
 456         /* For virtio_user case (that is when dev->pci_dev is NULL), we use
 457          * virtual address. And we need properly set _offset_, please see
 458          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 459          */
 460         if (dev->pci_dev)
 461                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 462         else {
 463                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 464                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 465                 if (queue_type == VTNET_TQ)
 466                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 467                 else if (queue_type == VTNET_CQ)
 468                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 469         }
 470
 471         if (queue_type == VTNET_TQ) {
 472                 struct virtio_tx_region *txr;
 473                 unsigned int i;
 474
 475                 txr = hdr_mz->addr;
 476                 memset(txr, 0, vq_size * sizeof(*txr));
 477                 for (i = 0; i < vq_size; i++) {
 478                         struct vring_desc *start_dp = txr[i].tx_indir;
 479
 480                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 481
 482                         /* first indirect descriptor is always the tx header */
 483                         start_dp->addr = txvq->virtio_net_hdr_mem
 484                                 + i * sizeof(*txr)
 485                                 + offsetof(struct virtio_tx_region, tx_hdr);
 486
 487                         start_dp->len = hw->vtnet_hdr_size;
 488                         start_dp->flags = VRING_DESC_F_NEXT;
 489                 }
 490         }
 491
 492         if (hw->vtpci_ops->setup_queue(hw, vq) < 0) {
 493                 PMD_INIT_LOG(ERR, "setup_queue failed");
 494                 return -EINVAL;
 495         }
 496
 497         return 0;
 498
 499 fail_q_alloc:
 500         rte_free(sw_ring);
 501         rte_memzone_free(hdr_mz);
 502         rte_memzone_free(mz);
 503         rte_free(vq);
 504
 505         return ret;
 506 }
 507
 508 static void
 509 virtio_free_queues(struct virtio_hw *hw)
 510 {
 511         uint16_t nr_vq = virtio_get_nr_vq(hw);
 512         struct virtqueue *vq;
 513         int queue_type;
 514         uint16_t i;
 515
 516         for (i = 0; i < nr_vq; i++) {
 517                 vq = hw->vqs[i];
 518                 if (!vq)
 519                         continue;
 520
 521                 queue_type = virtio_get_queue_type(hw, i);
 522                 if (queue_type == VTNET_RQ) {
 523                         rte_free(vq->sw_ring);
 524                         rte_memzone_free(vq->rxq.mz);
 525                 } else if (queue_type == VTNET_TQ) {
 526                         rte_memzone_free(vq->txq.mz);
 527                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 528                 } else {
 529                         rte_memzone_free(vq->cq.mz);
 530                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 531                 }
 532
 533                 rte_free(vq);
 534         }
 535
 536         rte_free(hw->vqs);
 537 }
 538
 539 static int
 540 virtio_alloc_queues(struct rte_eth_dev *dev)
 541 {
 542         struct virtio_hw *hw = dev->data->dev_private;
 543         uint16_t nr_vq = virtio_get_nr_vq(hw);
 544         uint16_t i;
 545         int ret;
 546
 547         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 548         if (!hw->vqs) {
 549                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 550                 return -ENOMEM;
 551         }
 552
 553         for (i = 0; i < nr_vq; i++) {
 554                 ret = virtio_init_queue(dev, i);
 555                 if (ret < 0) {
 556                         virtio_free_queues(hw);
 557                         return ret;
 558                 }
 559         }
 560
 561         return 0;
 562 }
 563
 564 static void
 565 virtio_dev_close(struct rte_eth_dev *dev)
 566 {
 567         struct virtio_hw *hw = dev->data->dev_private;
 568
 569         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 570
 571         /* reset the NIC */
 572         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 573                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 574         vtpci_reset(hw);
 575         hw->started = 0;
 576         virtio_dev_free_mbufs(dev);
 577         virtio_free_queues(hw);
 578 }
 579
 580 static void
 581 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 582 {
 583         struct virtio_hw *hw = dev->data->dev_private;
 584         struct virtio_pmd_ctrl ctrl;
 585         int dlen[1];
 586         int ret;
 587
 588         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 589                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 590                 return;
 591         }
 592
 593         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 594         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 595         ctrl.data[0] = 1;
 596         dlen[0] = 1;
 597
 598         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 599         if (ret)
 600                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 601 }
 602
 603 static void
 604 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 605 {
 606         struct virtio_hw *hw = dev->data->dev_private;
 607         struct virtio_pmd_ctrl ctrl;
 608         int dlen[1];
 609         int ret;
 610
 611         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 612                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 613                 return;
 614         }
 615
 616         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 617         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 618         ctrl.data[0] = 0;
 619         dlen[0] = 1;
 620
 621         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 622         if (ret)
 623                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 624 }
 625
 626 static void
 627 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 628 {
 629         struct virtio_hw *hw = dev->data->dev_private;
 630         struct virtio_pmd_ctrl ctrl;
 631         int dlen[1];
 632         int ret;
 633
 634         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 635                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 636                 return;
 637         }
 638
 639         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 640         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 641         ctrl.data[0] = 1;
 642         dlen[0] = 1;
 643
 644         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 645         if (ret)
 646                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 647 }
 648
 649 static void
 650 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 651 {
 652         struct virtio_hw *hw = dev->data->dev_private;
 653         struct virtio_pmd_ctrl ctrl;
 654         int dlen[1];
 655         int ret;
 656
 657         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 658                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 659                 return;
 660         }
 661
 662         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 663         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 664         ctrl.data[0] = 0;
 665         dlen[0] = 1;
 666
 667         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 668         if (ret)
 669                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 670 }
 671
 672 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 673 static int
 674 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 675 {
 676         struct virtio_hw *hw = dev->data->dev_private;
 677         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 678                                  hw->vtnet_hdr_size;
 679         uint32_t frame_size = mtu + ether_hdr_len;
 680
 681         if (mtu < ETHER_MIN_MTU || frame_size > VIRTIO_MAX_RX_PKTLEN) {
 682                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d\n",
 683                         ETHER_MIN_MTU, VIRTIO_MAX_RX_PKTLEN - ether_hdr_len);
 684                 return -EINVAL;
 685         }
 686         return 0;
 687 }
 688
 689 /*
 690  * dev_ops for virtio, bare necessities for basic operation
 691  */
 692 static const struct eth_dev_ops virtio_eth_dev_ops = {
 693         .dev_configure           = virtio_dev_configure,
 694         .dev_start               = virtio_dev_start,
 695         .dev_stop                = virtio_dev_stop,
 696         .dev_close               = virtio_dev_close,
 697         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 698         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 699         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 700         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 701         .mtu_set                 = virtio_mtu_set,
 702         .dev_infos_get           = virtio_dev_info_get,
 703         .stats_get               = virtio_dev_stats_get,
 704         .xstats_get              = virtio_dev_xstats_get,
 705         .xstats_get_names        = virtio_dev_xstats_get_names,
 706         .stats_reset             = virtio_dev_stats_reset,
 707         .xstats_reset            = virtio_dev_stats_reset,
 708         .link_update             = virtio_dev_link_update,
 709         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 710         .rx_queue_release        = virtio_dev_queue_release,
 711         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 712         .tx_queue_release        = virtio_dev_queue_release,
 713         /* collect stats per queue */
 714         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 715         .vlan_filter_set         = virtio_vlan_filter_set,
 716         .mac_addr_add            = virtio_mac_addr_add,
 717         .mac_addr_remove         = virtio_mac_addr_remove,
 718         .mac_addr_set            = virtio_mac_addr_set,
 719 };
 720
 721 static inline int
 722 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 723                                 struct rte_eth_link *link)
 724 {
 725         struct rte_eth_link *dst = link;
 726         struct rte_eth_link *src = &(dev->data->dev_link);
 727
 728         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 729                         *(uint64_t *)src) == 0)
 730                 return -1;
 731
 732         return 0;
 733 }
 734
 735 /**
 736  * Atomically writes the link status information into global
 737  * structure rte_eth_dev.
 738  *
 739  * @param dev
 740  *   - Pointer to the structure rte_eth_dev to read from.
 741  *   - Pointer to the buffer to be saved with the link status.
 742  *
 743  * @return
 744  *   - On success, zero.
 745  *   - On failure, negative value.
 746  */
 747 static inline int
 748 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 749                 struct rte_eth_link *link)
 750 {
 751         struct rte_eth_link *dst = &(dev->data->dev_link);
 752         struct rte_eth_link *src = link;
 753
 754         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 755                                         *(uint64_t *)src) == 0)
 756                 return -1;
 757
 758         return 0;
 759 }
 760
 761 static void
 762 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 763 {
 764         unsigned i;
 765
 766         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 767                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 768                 if (txvq == NULL)
 769                         continue;
 770
 771                 stats->opackets += txvq->stats.packets;
 772                 stats->obytes += txvq->stats.bytes;
 773                 stats->oerrors += txvq->stats.errors;
 774
 775                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 776                         stats->q_opackets[i] = txvq->stats.packets;
 777                         stats->q_obytes[i] = txvq->stats.bytes;
 778                 }
 779         }
 780
 781         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 782                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 783                 if (rxvq == NULL)
 784                         continue;
 785
 786                 stats->ipackets += rxvq->stats.packets;
 787                 stats->ibytes += rxvq->stats.bytes;
 788                 stats->ierrors += rxvq->stats.errors;
 789
 790                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 791                         stats->q_ipackets[i] = rxvq->stats.packets;
 792                         stats->q_ibytes[i] = rxvq->stats.bytes;
 793                 }
 794         }
 795
 796         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 797 }
 798
 799 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 800                                        struct rte_eth_xstat_name *xstats_names,
 801                                        __rte_unused unsigned limit)
 802 {
 803         unsigned i;
 804         unsigned count = 0;
 805         unsigned t;
 806
 807         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 808                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 809
 810         if (xstats_names != NULL) {
 811                 /* Note: limit checked in rte_eth_xstats_names() */
 812
 813                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 814                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 815                         if (rxvq == NULL)
 816                                 continue;
 817                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 818                                 snprintf(xstats_names[count].name,
 819                                         sizeof(xstats_names[count].name),
 820                                         "rx_q%u_%s", i,
 821                                         rte_virtio_rxq_stat_strings[t].name);
 822                                 count++;
 823                         }
 824                 }
 825
 826                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 827                         struct virtqueue *txvq = dev->data->tx_queues[i];
 828                         if (txvq == NULL)
 829                                 continue;
 830                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 831                                 snprintf(xstats_names[count].name,
 832                                         sizeof(xstats_names[count].name),
 833                                         "tx_q%u_%s", i,
 834                                         rte_virtio_txq_stat_strings[t].name);
 835                                 count++;
 836                         }
 837                 }
 838                 return count;
 839         }
 840         return nstats;
 841 }
 842
 843 static int
 844 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 845                       unsigned n)
 846 {
 847         unsigned i;
 848         unsigned count = 0;
 849
 850         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 851                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 852
 853         if (n < nstats)
 854                 return nstats;
 855
 856         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 857                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 858
 859                 if (rxvq == NULL)
 860                         continue;
 861
 862                 unsigned t;
 863
 864                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 865                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 866                                 rte_virtio_rxq_stat_strings[t].offset);
 867                         count++;
 868                 }
 869         }
 870
 871         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 872                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 873
 874                 if (txvq == NULL)
 875                         continue;
 876
 877                 unsigned t;
 878
 879                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 880                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 881                                 rte_virtio_txq_stat_strings[t].offset);
 882                         count++;
 883                 }
 884         }
 885
 886         return count;
 887 }
 888
 889 static void
 890 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 891 {
 892         virtio_update_stats(dev, stats);
 893 }
 894
 895 static void
 896 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 897 {
 898         unsigned int i;
 899
 900         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 901                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 902                 if (txvq == NULL)
 903                         continue;
 904
 905                 txvq->stats.packets = 0;
 906                 txvq->stats.bytes = 0;
 907                 txvq->stats.errors = 0;
 908                 txvq->stats.multicast = 0;
 909                 txvq->stats.broadcast = 0;
 910                 memset(txvq->stats.size_bins, 0,
 911                        sizeof(txvq->stats.size_bins[0]) * 8);
 912         }
 913
 914         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 915                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 916                 if (rxvq == NULL)
 917                         continue;
 918
 919                 rxvq->stats.packets = 0;
 920                 rxvq->stats.bytes = 0;
 921                 rxvq->stats.errors = 0;
 922                 rxvq->stats.multicast = 0;
 923                 rxvq->stats.broadcast = 0;
 924                 memset(rxvq->stats.size_bins, 0,
 925                        sizeof(rxvq->stats.size_bins[0]) * 8);
 926         }
 927 }
 928
 929 static void
 930 virtio_set_hwaddr(struct virtio_hw *hw)
 931 {
 932         vtpci_write_dev_config(hw,
 933                         offsetof(struct virtio_net_config, mac),
 934                         &hw->mac_addr, ETHER_ADDR_LEN);
 935 }
 936
 937 static void
 938 virtio_get_hwaddr(struct virtio_hw *hw)
 939 {
 940         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 941                 vtpci_read_dev_config(hw,
 942                         offsetof(struct virtio_net_config, mac),
 943                         &hw->mac_addr, ETHER_ADDR_LEN);
 944         } else {
 945                 eth_random_addr(&hw->mac_addr[0]);
 946                 virtio_set_hwaddr(hw);
 947         }
 948 }
 949
 950 static void
 951 virtio_mac_table_set(struct virtio_hw *hw,
 952                      const struct virtio_net_ctrl_mac *uc,
 953                      const struct virtio_net_ctrl_mac *mc)
 954 {
 955         struct virtio_pmd_ctrl ctrl;
 956         int err, len[2];
 957
 958         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 959                 PMD_DRV_LOG(INFO, "host does not support mac table");
 960                 return;
 961         }
 962
 963         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 964         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 965
 966         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 967         memcpy(ctrl.data, uc, len[0]);
 968
 969         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 970         memcpy(ctrl.data + len[0], mc, len[1]);
 971
 972         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 973         if (err != 0)
 974                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 975 }
 976
 977 static void
 978 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 979                     uint32_t index, uint32_t vmdq __rte_unused)
 980 {
 981         struct virtio_hw *hw = dev->data->dev_private;
 982         const struct ether_addr *addrs = dev->data->mac_addrs;
 983         unsigned int i;
 984         struct virtio_net_ctrl_mac *uc, *mc;
 985
 986         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 987                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 988                 return;
 989         }
 990
 991         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 992         uc->entries = 0;
 993         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 994         mc->entries = 0;
 995
 996         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 997                 const struct ether_addr *addr
 998                         = (i == index) ? mac_addr : addrs + i;
 999                 struct virtio_net_ctrl_mac *tbl
1000                         = is_multicast_ether_addr(addr) ? mc : uc;
1001
1002                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1003         }
1004
1005         virtio_mac_table_set(hw, uc, mc);
1006 }
1007
1008 static void
1009 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1010 {
1011         struct virtio_hw *hw = dev->data->dev_private;
1012         struct ether_addr *addrs = dev->data->mac_addrs;
1013         struct virtio_net_ctrl_mac *uc, *mc;
1014         unsigned int i;
1015
1016         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1017                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1018                 return;
1019         }
1020
1021         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1022         uc->entries = 0;
1023         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1024         mc->entries = 0;
1025
1026         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1027                 struct virtio_net_ctrl_mac *tbl;
1028
1029                 if (i == index || is_zero_ether_addr(addrs + i))
1030                         continue;
1031
1032                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1033                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1034         }
1035
1036         virtio_mac_table_set(hw, uc, mc);
1037 }
1038
1039 static void
1040 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1041 {
1042         struct virtio_hw *hw = dev->data->dev_private;
1043
1044         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1045
1046         /* Use atomic update if available */
1047         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1048                 struct virtio_pmd_ctrl ctrl;
1049                 int len = ETHER_ADDR_LEN;
1050
1051                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1052                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1053
1054                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1055                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1056         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1057                 virtio_set_hwaddr(hw);
1058 }
1059
1060 static int
1061 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1062 {
1063         struct virtio_hw *hw = dev->data->dev_private;
1064         struct virtio_pmd_ctrl ctrl;
1065         int len;
1066
1067         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1068                 return -ENOTSUP;
1069
1070         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1071         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1072         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1073         len = sizeof(vlan_id);
1074
1075         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1076 }
1077
1078 static int
1079 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1080 {
1081         uint64_t host_features;
1082
1083         /* Prepare guest_features: feature that driver wants to support */
1084         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1085                 req_features);
1086
1087         /* Read device(host) feature bits */
1088         host_features = hw->vtpci_ops->get_features(hw);
1089         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1090                 host_features);
1091
1092         /*
1093          * Negotiate features: Subset of device feature bits are written back
1094          * guest feature bits.
1095          */
1096         hw->guest_features = req_features;
1097         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1098         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1099                 hw->guest_features);
1100
1101         if (hw->modern) {
1102                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1103                         PMD_INIT_LOG(ERR,
1104                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1105                         return -1;
1106                 }
1107                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1108                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1109                         PMD_INIT_LOG(ERR,
1110                                 "failed to set FEATURES_OK status!");
1111                         return -1;
1112                 }
1113         }
1114
1115         hw->req_guest_features = req_features;
1116
1117         return 0;
1118 }
1119
1120 /*
1121  * Process Virtio Config changed interrupt and call the callback
1122  * if link state changed.
1123  */
1124 static void
1125 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1126                          void *param)
1127 {
1128         struct rte_eth_dev *dev = param;
1129         struct virtio_hw *hw = dev->data->dev_private;
1130         uint8_t isr;
1131
1132         /* Read interrupt status which clears interrupt */
1133         isr = vtpci_isr(hw);
1134         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1135
1136         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1137                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1138
1139         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1140                 if (virtio_dev_link_update(dev, 0) == 0)
1141                         _rte_eth_dev_callback_process(dev,
1142                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1143         }
1144
1145 }
1146
1147 static void
1148 rx_func_get(struct rte_eth_dev *eth_dev)
1149 {
1150         struct virtio_hw *hw = eth_dev->data->dev_private;
1151         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1152                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1153         else
1154                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1155 }
1156
1157 /* reset device and renegotiate features if needed */
1158 static int
1159 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1160 {
1161         struct virtio_hw *hw = eth_dev->data->dev_private;
1162         struct virtio_net_config *config;
1163         struct virtio_net_config local_config;
1164         struct rte_pci_device *pci_dev = eth_dev->pci_dev;
1165         int ret;
1166
1167         /* Reset the device although not necessary at startup */
1168         vtpci_reset(hw);
1169
1170         /* Tell the host we've noticed this device. */
1171         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1172
1173         /* Tell the host we've known how to drive the device. */
1174         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1175         if (virtio_negotiate_features(hw, req_features) < 0)
1176                 return -1;
1177
1178         /* If host does not support status then disable LSC */
1179         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1180                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1181         else
1182                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1183
1184         rte_eth_copy_pci_info(eth_dev, pci_dev);
1185
1186         rx_func_get(eth_dev);
1187
1188         /* Setting up rx_header size for the device */
1189         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1190             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1191                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1192         else
1193                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1194
1195         /* Copy the permanent MAC address to: virtio_hw */
1196         virtio_get_hwaddr(hw);
1197         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1198                         &eth_dev->data->mac_addrs[0]);
1199         PMD_INIT_LOG(DEBUG,
1200                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1201                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1202                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1203
1204         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1205                 config = &local_config;
1206
1207                 vtpci_read_dev_config(hw,
1208                         offsetof(struct virtio_net_config, mac),
1209                         &config->mac, sizeof(config->mac));
1210
1211                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1212                         vtpci_read_dev_config(hw,
1213                                 offsetof(struct virtio_net_config, status),
1214                                 &config->status, sizeof(config->status));
1215                 } else {
1216                         PMD_INIT_LOG(DEBUG,
1217                                      "VIRTIO_NET_F_STATUS is not supported");
1218                         config->status = 0;
1219                 }
1220
1221                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1222                         vtpci_read_dev_config(hw,
1223                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1224                                 &config->max_virtqueue_pairs,
1225                                 sizeof(config->max_virtqueue_pairs));
1226                 } else {
1227                         PMD_INIT_LOG(DEBUG,
1228                                      "VIRTIO_NET_F_MQ is not supported");
1229                         config->max_virtqueue_pairs = 1;
1230                 }
1231
1232                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1233
1234                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1235                                 config->max_virtqueue_pairs);
1236                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1237                 PMD_INIT_LOG(DEBUG,
1238                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1239                                 config->mac[0], config->mac[1],
1240                                 config->mac[2], config->mac[3],
1241                                 config->mac[4], config->mac[5]);
1242         } else {
1243                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1244                 hw->max_queue_pairs = 1;
1245         }
1246
1247         ret = virtio_alloc_queues(eth_dev);
1248         if (ret < 0)
1249                 return ret;
1250
1251         if (pci_dev)
1252                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1253                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1254                         pci_dev->id.device_id);
1255
1256         return 0;
1257 }
1258
1259 /*
1260  * This function is based on probe() function in virtio_pci.c
1261  * It returns 0 on success.
1262  */
1263 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 rte_pci_device *pci_dev;
1268         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1269         int ret;
1270
1271         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
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         if (pci_dev) {
1293                 ret = vtpci_init(pci_dev, hw, &dev_flags);
1294                 if (ret)
1295                         return ret;
1296         }
1297
1298         eth_dev->data->dev_flags = dev_flags;
1299
1300         /* reset device and negotiate default features */
1301         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1302         if (ret < 0)
1303                 return ret;
1304
1305         /* Setup interrupt callback  */
1306         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1307                 rte_intr_callback_register(&pci_dev->intr_handle,
1308                         virtio_interrupt_handler, eth_dev);
1309
1310         return 0;
1311 }
1312
1313 static int
1314 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1315 {
1316         struct rte_pci_device *pci_dev;
1317         struct virtio_hw *hw = eth_dev->data->dev_private;
1318
1319         PMD_INIT_FUNC_TRACE();
1320
1321         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1322                 return -EPERM;
1323
1324         if (hw->started == 1) {
1325                 virtio_dev_stop(eth_dev);
1326                 virtio_dev_close(eth_dev);
1327         }
1328         pci_dev = eth_dev->pci_dev;
1329
1330         eth_dev->dev_ops = NULL;
1331         eth_dev->tx_pkt_burst = NULL;
1332         eth_dev->rx_pkt_burst = NULL;
1333
1334         rte_free(eth_dev->data->mac_addrs);
1335         eth_dev->data->mac_addrs = NULL;
1336
1337         /* reset interrupt callback  */
1338         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1339                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1340                                                 virtio_interrupt_handler,
1341                                                 eth_dev);
1342         rte_eal_pci_unmap_device(pci_dev);
1343
1344         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1345
1346         return 0;
1347 }
1348
1349 static struct eth_driver rte_virtio_pmd = {
1350         .pci_drv = {
1351                 .driver = {
1352                         .name = "net_virtio",
1353                 },
1354                 .id_table = pci_id_virtio_map,
1355                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1356                 .probe = rte_eth_dev_pci_probe,
1357                 .remove = rte_eth_dev_pci_remove,
1358         },
1359         .eth_dev_init = eth_virtio_dev_init,
1360         .eth_dev_uninit = eth_virtio_dev_uninit,
1361         .dev_private_size = sizeof(struct virtio_hw),
1362 };
1363
1364 RTE_INIT(rte_virtio_pmd_init);
1365 static void
1366 rte_virtio_pmd_init(void)
1367 {
1368         if (rte_eal_iopl_init() != 0) {
1369                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1370                 return;
1371         }
1372
1373         rte_eal_pci_register(&rte_virtio_pmd.pci_drv);
1374 }
1375
1376 /*
1377  * Configure virtio device
1378  * It returns 0 on success.
1379  */
1380 static int
1381 virtio_dev_configure(struct rte_eth_dev *dev)
1382 {
1383         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1384         struct virtio_hw *hw = dev->data->dev_private;
1385         uint64_t req_features;
1386         int ret;
1387
1388         PMD_INIT_LOG(DEBUG, "configure");
1389         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1390         if (rxmode->hw_ip_checksum)
1391                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1392         if (rxmode->enable_lro)
1393                 req_features |=
1394                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1395                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1396
1397         /* if request features changed, reinit the device */
1398         if (req_features != hw->req_guest_features) {
1399                 ret = virtio_init_device(dev, req_features);
1400                 if (ret < 0)
1401                         return ret;
1402         }
1403
1404         if (rxmode->hw_ip_checksum &&
1405                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1406                 PMD_DRV_LOG(NOTICE,
1407                         "rx ip checksum not available on this host");
1408                 return -ENOTSUP;
1409         }
1410
1411         if (rxmode->enable_lro &&
1412                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1413                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1414                 PMD_DRV_LOG(NOTICE,
1415                         "lro not available on this host");
1416                 return -ENOTSUP;
1417         }
1418
1419         /* start control queue */
1420         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1421                 virtio_dev_cq_start(dev);
1422
1423         hw->vlan_strip = rxmode->hw_vlan_strip;
1424
1425         if (rxmode->hw_vlan_filter
1426             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1427                 PMD_DRV_LOG(NOTICE,
1428                             "vlan filtering not available on this host");
1429                 return -ENOTSUP;
1430         }
1431
1432         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1433                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1434                         PMD_DRV_LOG(ERR, "failed to set config vector");
1435                         return -EBUSY;
1436                 }
1437
1438         return 0;
1439 }
1440
1441
1442 static int
1443 virtio_dev_start(struct rte_eth_dev *dev)
1444 {
1445         uint16_t nb_queues, i;
1446         struct virtio_hw *hw = dev->data->dev_private;
1447         struct virtnet_rx *rxvq;
1448         struct virtnet_tx *txvq __rte_unused;
1449
1450         /* check if lsc interrupt feature is enabled */
1451         if (dev->data->dev_conf.intr_conf.lsc) {
1452                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1453                         PMD_DRV_LOG(ERR, "link status not supported by host");
1454                         return -ENOTSUP;
1455                 }
1456
1457                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1458                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1459                         return -EIO;
1460                 }
1461         }
1462
1463         /* Initialize Link state */
1464         virtio_dev_link_update(dev, 0);
1465
1466         /* On restart after stop do not touch queues */
1467         if (hw->started)
1468                 return 0;
1469
1470         /* Do final configuration before rx/tx engine starts */
1471         virtio_dev_rxtx_start(dev);
1472         vtpci_reinit_complete(hw);
1473
1474         hw->started = 1;
1475
1476         /*Notify the backend
1477          *Otherwise the tap backend might already stop its queue due to fullness.
1478          *vhost backend will have no chance to be waked up
1479          */
1480         nb_queues = dev->data->nb_rx_queues;
1481         if (nb_queues > 1) {
1482                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1483                         return -EINVAL;
1484         }
1485
1486         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1487
1488         for (i = 0; i < nb_queues; i++) {
1489                 rxvq = dev->data->rx_queues[i];
1490                 virtqueue_notify(rxvq->vq);
1491         }
1492
1493         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1494
1495         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1496                 rxvq = dev->data->rx_queues[i];
1497                 VIRTQUEUE_DUMP(rxvq->vq);
1498         }
1499
1500         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1501                 txvq = dev->data->tx_queues[i];
1502                 VIRTQUEUE_DUMP(txvq->vq);
1503         }
1504
1505         return 0;
1506 }
1507
1508 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1509 {
1510         struct rte_mbuf *buf;
1511         int i, mbuf_num = 0;
1512
1513         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1514                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1515
1516                 PMD_INIT_LOG(DEBUG,
1517                              "Before freeing rxq[%d] used and unused buf", i);
1518                 VIRTQUEUE_DUMP(rxvq->vq);
1519
1520                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1521                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1522                         rte_pktmbuf_free(buf);
1523                         mbuf_num++;
1524                 }
1525
1526                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1527                 PMD_INIT_LOG(DEBUG,
1528                              "After freeing rxq[%d] used and unused buf", i);
1529                 VIRTQUEUE_DUMP(rxvq->vq);
1530         }
1531
1532         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1533                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1534
1535                 PMD_INIT_LOG(DEBUG,
1536                              "Before freeing txq[%d] used and unused bufs",
1537                              i);
1538                 VIRTQUEUE_DUMP(txvq->vq);
1539
1540                 mbuf_num = 0;
1541                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1542                         rte_pktmbuf_free(buf);
1543                         mbuf_num++;
1544                 }
1545
1546                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1547                 PMD_INIT_LOG(DEBUG,
1548                              "After freeing txq[%d] used and unused buf", i);
1549                 VIRTQUEUE_DUMP(txvq->vq);
1550         }
1551 }
1552
1553 /*
1554  * Stop device: disable interrupt and mark link down
1555  */
1556 static void
1557 virtio_dev_stop(struct rte_eth_dev *dev)
1558 {
1559         struct rte_eth_link link;
1560
1561         PMD_INIT_LOG(DEBUG, "stop");
1562
1563         if (dev->data->dev_conf.intr_conf.lsc)
1564                 rte_intr_disable(&dev->pci_dev->intr_handle);
1565
1566         memset(&link, 0, sizeof(link));
1567         virtio_dev_atomic_write_link_status(dev, &link);
1568 }
1569
1570 static int
1571 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1572 {
1573         struct rte_eth_link link, old;
1574         uint16_t status;
1575         struct virtio_hw *hw = dev->data->dev_private;
1576         memset(&link, 0, sizeof(link));
1577         virtio_dev_atomic_read_link_status(dev, &link);
1578         old = link;
1579         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1580         link.link_speed  = SPEED_10G;
1581
1582         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1583                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1584                 vtpci_read_dev_config(hw,
1585                                 offsetof(struct virtio_net_config, status),
1586                                 &status, sizeof(status));
1587                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1588                         link.link_status = ETH_LINK_DOWN;
1589                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1590                                      dev->data->port_id);
1591                 } else {
1592                         link.link_status = ETH_LINK_UP;
1593                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1594                                      dev->data->port_id);
1595                 }
1596         } else {
1597                 link.link_status = ETH_LINK_UP;
1598         }
1599         virtio_dev_atomic_write_link_status(dev, &link);
1600
1601         return (old.link_status == link.link_status) ? -1 : 0;
1602 }
1603
1604 static void
1605 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1606 {
1607         uint64_t tso_mask;
1608         struct virtio_hw *hw = dev->data->dev_private;
1609
1610         if (dev->pci_dev)
1611                 dev_info->driver_name = dev->driver->pci_drv.driver.name;
1612         else
1613                 dev_info->driver_name = "virtio_user PMD";
1614         dev_info->max_rx_queues =
1615                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1616         dev_info->max_tx_queues =
1617                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1618         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1619         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1620         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1621         dev_info->default_txconf = (struct rte_eth_txconf) {
1622                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1623         };
1624         dev_info->rx_offload_capa =
1625                 DEV_RX_OFFLOAD_TCP_CKSUM |
1626                 DEV_RX_OFFLOAD_UDP_CKSUM |
1627                 DEV_RX_OFFLOAD_TCP_LRO;
1628         dev_info->tx_offload_capa = 0;
1629
1630         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1631                 dev_info->tx_offload_capa |=
1632                         DEV_TX_OFFLOAD_UDP_CKSUM |
1633                         DEV_TX_OFFLOAD_TCP_CKSUM;
1634         }
1635
1636         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1637                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1638         if ((hw->guest_features & tso_mask) == tso_mask)
1639                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1640 }
1641
1642 /*
1643  * It enables testpmd to collect per queue stats.
1644  */
1645 static int
1646 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1647 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1648 __rte_unused uint8_t is_rx)
1649 {
1650         return 0;
1651 }
1652
1653 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1654 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);