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 void
 312 virtio_init_vring(struct virtqueue *vq)
 313 {
 314         int size = vq->vq_nentries;
 315         struct vring *vr = &vq->vq_ring;
 316         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 317
 318         PMD_INIT_FUNC_TRACE();
 319
 320         /*
 321          * Reinitialise since virtio port might have been stopped and restarted
 322          */
 323         memset(ring_mem, 0, vq->vq_ring_size);
 324         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 325         vq->vq_used_cons_idx = 0;
 326         vq->vq_desc_head_idx = 0;
 327         vq->vq_avail_idx = 0;
 328         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 329         vq->vq_free_cnt = vq->vq_nentries;
 330         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 331
 332         vring_desc_init(vr->desc, size);
 333
 334         /*
 335          * Disable device(host) interrupting guest
 336          */
 337         virtqueue_disable_intr(vq);
 338 }
 339
 340 static int
 341 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 342 {
 343         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 344         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 345         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 346         unsigned int vq_size, size;
 347         struct virtio_hw *hw = dev->data->dev_private;
 348         struct virtnet_rx *rxvq = NULL;
 349         struct virtnet_tx *txvq = NULL;
 350         struct virtnet_ctl *cvq = NULL;
 351         struct virtqueue *vq;
 352         size_t sz_hdr_mz = 0;
 353         void *sw_ring = NULL;
 354         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 355         int ret;
 356
 357         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 358
 359         /*
 360          * Read the virtqueue size from the Queue Size field
 361          * Always power of 2 and if 0 virtqueue does not exist
 362          */
 363         vq_size = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx);
 364         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 365         if (vq_size == 0) {
 366                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 367                 return -EINVAL;
 368         }
 369
 370         if (!rte_is_power_of_2(vq_size)) {
 371                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 372                 return -EINVAL;
 373         }
 374
 375         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 376                  dev->data->port_id, vtpci_queue_idx);
 377
 378         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 379                                 vq_size * sizeof(struct vq_desc_extra),
 380                                 RTE_CACHE_LINE_SIZE);
 381         if (queue_type == VTNET_TQ) {
 382                 /*
 383                  * For each xmit packet, allocate a virtio_net_hdr
 384                  * and indirect ring elements
 385                  */
 386                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 387         } else if (queue_type == VTNET_CQ) {
 388                 /* Allocate a page for control vq command, data and status */
 389                 sz_hdr_mz = PAGE_SIZE;
 390         }
 391
 392         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 393                                 SOCKET_ID_ANY);
 394         if (vq == NULL) {
 395                 PMD_INIT_LOG(ERR, "can not allocate vq");
 396                 return -ENOMEM;
 397         }
 398         hw->vqs[vtpci_queue_idx] = vq;
 399
 400         vq->hw = hw;
 401         vq->vq_queue_index = vtpci_queue_idx;
 402         vq->vq_nentries = vq_size;
 403
 404         /*
 405          * Reserve a memzone for vring elements
 406          */
 407         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 408         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 409         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 410                      size, vq->vq_ring_size);
 411
 412         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 413                                          SOCKET_ID_ANY,
 414                                          0, VIRTIO_PCI_VRING_ALIGN);
 415         if (mz == NULL) {
 416                 if (rte_errno == EEXIST)
 417                         mz = rte_memzone_lookup(vq_name);
 418                 if (mz == NULL) {
 419                         ret = -ENOMEM;
 420                         goto fail_q_alloc;
 421                 }
 422         }
 423
 424         memset(mz->addr, 0, sizeof(mz->len));
 425
 426         vq->vq_ring_mem = mz->phys_addr;
 427         vq->vq_ring_virt_mem = mz->addr;
 428         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 429                      (uint64_t)mz->phys_addr);
 430         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 431                      (uint64_t)(uintptr_t)mz->addr);
 432
 433         virtio_init_vring(vq);
 434
 435         if (sz_hdr_mz) {
 436                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 437                          dev->data->port_id, vtpci_queue_idx);
 438                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 439                                                      SOCKET_ID_ANY, 0,
 440                                                      RTE_CACHE_LINE_SIZE);
 441                 if (hdr_mz == NULL) {
 442                         if (rte_errno == EEXIST)
 443                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 444                         if (hdr_mz == NULL) {
 445                                 ret = -ENOMEM;
 446                                 goto fail_q_alloc;
 447                         }
 448                 }
 449         }
 450
 451         if (queue_type == VTNET_RQ) {
 452                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 453                                sizeof(vq->sw_ring[0]);
 454
 455                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 456                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 457                 if (!sw_ring) {
 458                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 459                         ret = -ENOMEM;
 460                         goto fail_q_alloc;
 461                 }
 462
 463                 vq->sw_ring = sw_ring;
 464                 rxvq = &vq->rxq;
 465                 rxvq->vq = vq;
 466                 rxvq->port_id = dev->data->port_id;
 467                 rxvq->mz = mz;
 468         } else if (queue_type == VTNET_TQ) {
 469                 txvq = &vq->txq;
 470                 txvq->vq = vq;
 471                 txvq->port_id = dev->data->port_id;
 472                 txvq->mz = mz;
 473                 txvq->virtio_net_hdr_mz = hdr_mz;
 474                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 475         } else if (queue_type == VTNET_CQ) {
 476                 cvq = &vq->cq;
 477                 cvq->vq = vq;
 478                 cvq->mz = mz;
 479                 cvq->virtio_net_hdr_mz = hdr_mz;
 480                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 481                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 482
 483                 hw->cvq = cvq;
 484         }
 485
 486         /* For virtio_user case (that is when dev->pci_dev is NULL), we use
 487          * virtual address. And we need properly set _offset_, please see
 488          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 489          */
 490         if (dev->pci_dev)
 491                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 492         else {
 493                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 494                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 495                 if (queue_type == VTNET_TQ)
 496                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 497                 else if (queue_type == VTNET_CQ)
 498                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 499         }
 500
 501         if (queue_type == VTNET_TQ) {
 502                 struct virtio_tx_region *txr;
 503                 unsigned int i;
 504
 505                 txr = hdr_mz->addr;
 506                 memset(txr, 0, vq_size * sizeof(*txr));
 507                 for (i = 0; i < vq_size; i++) {
 508                         struct vring_desc *start_dp = txr[i].tx_indir;
 509
 510                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 511
 512                         /* first indirect descriptor is always the tx header */
 513                         start_dp->addr = txvq->virtio_net_hdr_mem
 514                                 + i * sizeof(*txr)
 515                                 + offsetof(struct virtio_tx_region, tx_hdr);
 516
 517                         start_dp->len = hw->vtnet_hdr_size;
 518                         start_dp->flags = VRING_DESC_F_NEXT;
 519                 }
 520         }
 521
 522         if (hw->vtpci_ops->setup_queue(hw, vq) < 0) {
 523                 PMD_INIT_LOG(ERR, "setup_queue failed");
 524                 return -EINVAL;
 525         }
 526
 527         return 0;
 528
 529 fail_q_alloc:
 530         rte_free(sw_ring);
 531         rte_memzone_free(hdr_mz);
 532         rte_memzone_free(mz);
 533         rte_free(vq);
 534
 535         return ret;
 536 }
 537
 538 static void
 539 virtio_free_queues(struct virtio_hw *hw)
 540 {
 541         uint16_t nr_vq = virtio_get_nr_vq(hw);
 542         struct virtqueue *vq;
 543         int queue_type;
 544         uint16_t i;
 545
 546         for (i = 0; i < nr_vq; i++) {
 547                 vq = hw->vqs[i];
 548                 if (!vq)
 549                         continue;
 550
 551                 queue_type = virtio_get_queue_type(hw, i);
 552                 if (queue_type == VTNET_RQ) {
 553                         rte_free(vq->sw_ring);
 554                         rte_memzone_free(vq->rxq.mz);
 555                 } else if (queue_type == VTNET_TQ) {
 556                         rte_memzone_free(vq->txq.mz);
 557                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 558                 } else {
 559                         rte_memzone_free(vq->cq.mz);
 560                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 561                 }
 562
 563                 rte_free(vq);
 564         }
 565
 566         rte_free(hw->vqs);
 567 }
 568
 569 static int
 570 virtio_alloc_queues(struct rte_eth_dev *dev)
 571 {
 572         struct virtio_hw *hw = dev->data->dev_private;
 573         uint16_t nr_vq = virtio_get_nr_vq(hw);
 574         uint16_t i;
 575         int ret;
 576
 577         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 578         if (!hw->vqs) {
 579                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 580                 return -ENOMEM;
 581         }
 582
 583         for (i = 0; i < nr_vq; i++) {
 584                 ret = virtio_init_queue(dev, i);
 585                 if (ret < 0) {
 586                         virtio_free_queues(hw);
 587                         return ret;
 588                 }
 589         }
 590
 591         return 0;
 592 }
 593
 594 static void
 595 virtio_dev_close(struct rte_eth_dev *dev)
 596 {
 597         struct virtio_hw *hw = dev->data->dev_private;
 598
 599         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 600
 601         /* reset the NIC */
 602         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 603                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 604         vtpci_reset(hw);
 605         hw->started = 0;
 606         virtio_dev_free_mbufs(dev);
 607         virtio_free_queues(hw);
 608 }
 609
 610 static void
 611 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 612 {
 613         struct virtio_hw *hw = dev->data->dev_private;
 614         struct virtio_pmd_ctrl ctrl;
 615         int dlen[1];
 616         int ret;
 617
 618         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 619                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 620                 return;
 621         }
 622
 623         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 624         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 625         ctrl.data[0] = 1;
 626         dlen[0] = 1;
 627
 628         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 629         if (ret)
 630                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 631 }
 632
 633 static void
 634 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 635 {
 636         struct virtio_hw *hw = dev->data->dev_private;
 637         struct virtio_pmd_ctrl ctrl;
 638         int dlen[1];
 639         int ret;
 640
 641         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 642                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 643                 return;
 644         }
 645
 646         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 647         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 648         ctrl.data[0] = 0;
 649         dlen[0] = 1;
 650
 651         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 652         if (ret)
 653                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 654 }
 655
 656 static void
 657 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 658 {
 659         struct virtio_hw *hw = dev->data->dev_private;
 660         struct virtio_pmd_ctrl ctrl;
 661         int dlen[1];
 662         int ret;
 663
 664         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 665                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 666                 return;
 667         }
 668
 669         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 670         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 671         ctrl.data[0] = 1;
 672         dlen[0] = 1;
 673
 674         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 675         if (ret)
 676                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 677 }
 678
 679 static void
 680 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 681 {
 682         struct virtio_hw *hw = dev->data->dev_private;
 683         struct virtio_pmd_ctrl ctrl;
 684         int dlen[1];
 685         int ret;
 686
 687         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 688                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 689                 return;
 690         }
 691
 692         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 693         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 694         ctrl.data[0] = 0;
 695         dlen[0] = 1;
 696
 697         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 698         if (ret)
 699                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 700 }
 701
 702 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 703 static int
 704 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 705 {
 706         struct virtio_hw *hw = dev->data->dev_private;
 707         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 708                                  hw->vtnet_hdr_size;
 709         uint32_t frame_size = mtu + ether_hdr_len;
 710
 711         if (mtu < ETHER_MIN_MTU || frame_size > VIRTIO_MAX_RX_PKTLEN) {
 712                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d\n",
 713                         ETHER_MIN_MTU, VIRTIO_MAX_RX_PKTLEN - ether_hdr_len);
 714                 return -EINVAL;
 715         }
 716         return 0;
 717 }
 718
 719 /*
 720  * dev_ops for virtio, bare necessities for basic operation
 721  */
 722 static const struct eth_dev_ops virtio_eth_dev_ops = {
 723         .dev_configure           = virtio_dev_configure,
 724         .dev_start               = virtio_dev_start,
 725         .dev_stop                = virtio_dev_stop,
 726         .dev_close               = virtio_dev_close,
 727         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 728         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 729         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 730         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 731         .mtu_set                 = virtio_mtu_set,
 732         .dev_infos_get           = virtio_dev_info_get,
 733         .stats_get               = virtio_dev_stats_get,
 734         .xstats_get              = virtio_dev_xstats_get,
 735         .xstats_get_names        = virtio_dev_xstats_get_names,
 736         .stats_reset             = virtio_dev_stats_reset,
 737         .xstats_reset            = virtio_dev_stats_reset,
 738         .link_update             = virtio_dev_link_update,
 739         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 740         .rx_queue_release        = virtio_dev_queue_release,
 741         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 742         .tx_queue_release        = virtio_dev_queue_release,
 743         /* collect stats per queue */
 744         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 745         .vlan_filter_set         = virtio_vlan_filter_set,
 746         .mac_addr_add            = virtio_mac_addr_add,
 747         .mac_addr_remove         = virtio_mac_addr_remove,
 748         .mac_addr_set            = virtio_mac_addr_set,
 749 };
 750
 751 static inline int
 752 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 753                                 struct rte_eth_link *link)
 754 {
 755         struct rte_eth_link *dst = link;
 756         struct rte_eth_link *src = &(dev->data->dev_link);
 757
 758         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 759                         *(uint64_t *)src) == 0)
 760                 return -1;
 761
 762         return 0;
 763 }
 764
 765 /**
 766  * Atomically writes the link status information into global
 767  * structure rte_eth_dev.
 768  *
 769  * @param dev
 770  *   - Pointer to the structure rte_eth_dev to read from.
 771  *   - Pointer to the buffer to be saved with the link status.
 772  *
 773  * @return
 774  *   - On success, zero.
 775  *   - On failure, negative value.
 776  */
 777 static inline int
 778 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 779                 struct rte_eth_link *link)
 780 {
 781         struct rte_eth_link *dst = &(dev->data->dev_link);
 782         struct rte_eth_link *src = link;
 783
 784         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 785                                         *(uint64_t *)src) == 0)
 786                 return -1;
 787
 788         return 0;
 789 }
 790
 791 static void
 792 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 793 {
 794         unsigned i;
 795
 796         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 797                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 798                 if (txvq == NULL)
 799                         continue;
 800
 801                 stats->opackets += txvq->stats.packets;
 802                 stats->obytes += txvq->stats.bytes;
 803                 stats->oerrors += txvq->stats.errors;
 804
 805                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 806                         stats->q_opackets[i] = txvq->stats.packets;
 807                         stats->q_obytes[i] = txvq->stats.bytes;
 808                 }
 809         }
 810
 811         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 812                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 813                 if (rxvq == NULL)
 814                         continue;
 815
 816                 stats->ipackets += rxvq->stats.packets;
 817                 stats->ibytes += rxvq->stats.bytes;
 818                 stats->ierrors += rxvq->stats.errors;
 819
 820                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 821                         stats->q_ipackets[i] = rxvq->stats.packets;
 822                         stats->q_ibytes[i] = rxvq->stats.bytes;
 823                 }
 824         }
 825
 826         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 827 }
 828
 829 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 830                                        struct rte_eth_xstat_name *xstats_names,
 831                                        __rte_unused unsigned limit)
 832 {
 833         unsigned i;
 834         unsigned count = 0;
 835         unsigned t;
 836
 837         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 838                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 839
 840         if (xstats_names != NULL) {
 841                 /* Note: limit checked in rte_eth_xstats_names() */
 842
 843                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 844                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 845                         if (rxvq == NULL)
 846                                 continue;
 847                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 848                                 snprintf(xstats_names[count].name,
 849                                         sizeof(xstats_names[count].name),
 850                                         "rx_q%u_%s", i,
 851                                         rte_virtio_rxq_stat_strings[t].name);
 852                                 count++;
 853                         }
 854                 }
 855
 856                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 857                         struct virtqueue *txvq = dev->data->tx_queues[i];
 858                         if (txvq == NULL)
 859                                 continue;
 860                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 861                                 snprintf(xstats_names[count].name,
 862                                         sizeof(xstats_names[count].name),
 863                                         "tx_q%u_%s", i,
 864                                         rte_virtio_txq_stat_strings[t].name);
 865                                 count++;
 866                         }
 867                 }
 868                 return count;
 869         }
 870         return nstats;
 871 }
 872
 873 static int
 874 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 875                       unsigned n)
 876 {
 877         unsigned i;
 878         unsigned count = 0;
 879
 880         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 881                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 882
 883         if (n < nstats)
 884                 return nstats;
 885
 886         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 887                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 888
 889                 if (rxvq == NULL)
 890                         continue;
 891
 892                 unsigned t;
 893
 894                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 895                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 896                                 rte_virtio_rxq_stat_strings[t].offset);
 897                         count++;
 898                 }
 899         }
 900
 901         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 902                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 903
 904                 if (txvq == NULL)
 905                         continue;
 906
 907                 unsigned t;
 908
 909                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 910                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 911                                 rte_virtio_txq_stat_strings[t].offset);
 912                         count++;
 913                 }
 914         }
 915
 916         return count;
 917 }
 918
 919 static void
 920 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 921 {
 922         virtio_update_stats(dev, stats);
 923 }
 924
 925 static void
 926 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 927 {
 928         unsigned int i;
 929
 930         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 931                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 932                 if (txvq == NULL)
 933                         continue;
 934
 935                 txvq->stats.packets = 0;
 936                 txvq->stats.bytes = 0;
 937                 txvq->stats.errors = 0;
 938                 txvq->stats.multicast = 0;
 939                 txvq->stats.broadcast = 0;
 940                 memset(txvq->stats.size_bins, 0,
 941                        sizeof(txvq->stats.size_bins[0]) * 8);
 942         }
 943
 944         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 945                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 946                 if (rxvq == NULL)
 947                         continue;
 948
 949                 rxvq->stats.packets = 0;
 950                 rxvq->stats.bytes = 0;
 951                 rxvq->stats.errors = 0;
 952                 rxvq->stats.multicast = 0;
 953                 rxvq->stats.broadcast = 0;
 954                 memset(rxvq->stats.size_bins, 0,
 955                        sizeof(rxvq->stats.size_bins[0]) * 8);
 956         }
 957 }
 958
 959 static void
 960 virtio_set_hwaddr(struct virtio_hw *hw)
 961 {
 962         vtpci_write_dev_config(hw,
 963                         offsetof(struct virtio_net_config, mac),
 964                         &hw->mac_addr, ETHER_ADDR_LEN);
 965 }
 966
 967 static void
 968 virtio_get_hwaddr(struct virtio_hw *hw)
 969 {
 970         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 971                 vtpci_read_dev_config(hw,
 972                         offsetof(struct virtio_net_config, mac),
 973                         &hw->mac_addr, ETHER_ADDR_LEN);
 974         } else {
 975                 eth_random_addr(&hw->mac_addr[0]);
 976                 virtio_set_hwaddr(hw);
 977         }
 978 }
 979
 980 static void
 981 virtio_mac_table_set(struct virtio_hw *hw,
 982                      const struct virtio_net_ctrl_mac *uc,
 983                      const struct virtio_net_ctrl_mac *mc)
 984 {
 985         struct virtio_pmd_ctrl ctrl;
 986         int err, len[2];
 987
 988         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 989                 PMD_DRV_LOG(INFO, "host does not support mac table");
 990                 return;
 991         }
 992
 993         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 994         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 995
 996         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 997         memcpy(ctrl.data, uc, len[0]);
 998
 999         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1000         memcpy(ctrl.data + len[0], mc, len[1]);
1001
1002         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1003         if (err != 0)
1004                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1005 }
1006
1007 static void
1008 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1009                     uint32_t index, uint32_t vmdq __rte_unused)
1010 {
1011         struct virtio_hw *hw = dev->data->dev_private;
1012         const struct ether_addr *addrs = dev->data->mac_addrs;
1013         unsigned int i;
1014         struct virtio_net_ctrl_mac *uc, *mc;
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                 const struct ether_addr *addr
1028                         = (i == index) ? mac_addr : addrs + i;
1029                 struct virtio_net_ctrl_mac *tbl
1030                         = is_multicast_ether_addr(addr) ? mc : uc;
1031
1032                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1033         }
1034
1035         virtio_mac_table_set(hw, uc, mc);
1036 }
1037
1038 static void
1039 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1040 {
1041         struct virtio_hw *hw = dev->data->dev_private;
1042         struct ether_addr *addrs = dev->data->mac_addrs;
1043         struct virtio_net_ctrl_mac *uc, *mc;
1044         unsigned int i;
1045
1046         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1047                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1048                 return;
1049         }
1050
1051         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1052         uc->entries = 0;
1053         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1054         mc->entries = 0;
1055
1056         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1057                 struct virtio_net_ctrl_mac *tbl;
1058
1059                 if (i == index || is_zero_ether_addr(addrs + i))
1060                         continue;
1061
1062                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1063                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1064         }
1065
1066         virtio_mac_table_set(hw, uc, mc);
1067 }
1068
1069 static void
1070 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1071 {
1072         struct virtio_hw *hw = dev->data->dev_private;
1073
1074         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1075
1076         /* Use atomic update if available */
1077         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1078                 struct virtio_pmd_ctrl ctrl;
1079                 int len = ETHER_ADDR_LEN;
1080
1081                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1082                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1083
1084                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1085                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1086         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1087                 virtio_set_hwaddr(hw);
1088 }
1089
1090 static int
1091 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1092 {
1093         struct virtio_hw *hw = dev->data->dev_private;
1094         struct virtio_pmd_ctrl ctrl;
1095         int len;
1096
1097         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1098                 return -ENOTSUP;
1099
1100         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1101         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1102         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1103         len = sizeof(vlan_id);
1104
1105         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1106 }
1107
1108 static int
1109 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1110 {
1111         uint64_t host_features;
1112
1113         /* Prepare guest_features: feature that driver wants to support */
1114         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1115                 req_features);
1116
1117         /* Read device(host) feature bits */
1118         host_features = hw->vtpci_ops->get_features(hw);
1119         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1120                 host_features);
1121
1122         /*
1123          * Negotiate features: Subset of device feature bits are written back
1124          * guest feature bits.
1125          */
1126         hw->guest_features = req_features;
1127         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1128         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1129                 hw->guest_features);
1130
1131         if (hw->modern) {
1132                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1133                         PMD_INIT_LOG(ERR,
1134                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1135                         return -1;
1136                 }
1137                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1138                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1139                         PMD_INIT_LOG(ERR,
1140                                 "failed to set FEATURES_OK status!");
1141                         return -1;
1142                 }
1143         }
1144
1145         hw->req_guest_features = req_features;
1146
1147         return 0;
1148 }
1149
1150 /*
1151  * Process Virtio Config changed interrupt and call the callback
1152  * if link state changed.
1153  */
1154 static void
1155 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1156                          void *param)
1157 {
1158         struct rte_eth_dev *dev = param;
1159         struct virtio_hw *hw = dev->data->dev_private;
1160         uint8_t isr;
1161
1162         /* Read interrupt status which clears interrupt */
1163         isr = vtpci_isr(hw);
1164         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1165
1166         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1167                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1168
1169         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1170                 if (virtio_dev_link_update(dev, 0) == 0)
1171                         _rte_eth_dev_callback_process(dev,
1172                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1173         }
1174
1175 }
1176
1177 static void
1178 rx_func_get(struct rte_eth_dev *eth_dev)
1179 {
1180         struct virtio_hw *hw = eth_dev->data->dev_private;
1181         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1182                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1183         else
1184                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1185 }
1186
1187 /* reset device and renegotiate features if needed */
1188 static int
1189 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1190 {
1191         struct virtio_hw *hw = eth_dev->data->dev_private;
1192         struct virtio_net_config *config;
1193         struct virtio_net_config local_config;
1194         struct rte_pci_device *pci_dev = eth_dev->pci_dev;
1195         int ret;
1196
1197         /* Reset the device although not necessary at startup */
1198         vtpci_reset(hw);
1199
1200         /* Tell the host we've noticed this device. */
1201         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1202
1203         /* Tell the host we've known how to drive the device. */
1204         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1205         if (virtio_negotiate_features(hw, req_features) < 0)
1206                 return -1;
1207
1208         /* If host does not support status then disable LSC */
1209         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1210                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1211         else
1212                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1213
1214         rte_eth_copy_pci_info(eth_dev, pci_dev);
1215
1216         rx_func_get(eth_dev);
1217
1218         /* Setting up rx_header size for the device */
1219         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1220             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1221                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1222         else
1223                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1224
1225         /* Copy the permanent MAC address to: virtio_hw */
1226         virtio_get_hwaddr(hw);
1227         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1228                         &eth_dev->data->mac_addrs[0]);
1229         PMD_INIT_LOG(DEBUG,
1230                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1231                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1232                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1233
1234         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1235                 config = &local_config;
1236
1237                 vtpci_read_dev_config(hw,
1238                         offsetof(struct virtio_net_config, mac),
1239                         &config->mac, sizeof(config->mac));
1240
1241                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1242                         vtpci_read_dev_config(hw,
1243                                 offsetof(struct virtio_net_config, status),
1244                                 &config->status, sizeof(config->status));
1245                 } else {
1246                         PMD_INIT_LOG(DEBUG,
1247                                      "VIRTIO_NET_F_STATUS is not supported");
1248                         config->status = 0;
1249                 }
1250
1251                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1252                         vtpci_read_dev_config(hw,
1253                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1254                                 &config->max_virtqueue_pairs,
1255                                 sizeof(config->max_virtqueue_pairs));
1256                 } else {
1257                         PMD_INIT_LOG(DEBUG,
1258                                      "VIRTIO_NET_F_MQ is not supported");
1259                         config->max_virtqueue_pairs = 1;
1260                 }
1261
1262                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1263
1264                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1265                                 config->max_virtqueue_pairs);
1266                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1267                 PMD_INIT_LOG(DEBUG,
1268                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1269                                 config->mac[0], config->mac[1],
1270                                 config->mac[2], config->mac[3],
1271                                 config->mac[4], config->mac[5]);
1272         } else {
1273                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1274                 hw->max_queue_pairs = 1;
1275         }
1276
1277         ret = virtio_alloc_queues(eth_dev);
1278         if (ret < 0)
1279                 return ret;
1280
1281         if (pci_dev)
1282                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1283                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1284                         pci_dev->id.device_id);
1285
1286         return 0;
1287 }
1288
1289 /*
1290  * This function is based on probe() function in virtio_pci.c
1291  * It returns 0 on success.
1292  */
1293 int
1294 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1295 {
1296         struct virtio_hw *hw = eth_dev->data->dev_private;
1297         struct rte_pci_device *pci_dev;
1298         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1299         int ret;
1300
1301         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1302
1303         eth_dev->dev_ops = &virtio_eth_dev_ops;
1304         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1305
1306         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1307                 rx_func_get(eth_dev);
1308                 return 0;
1309         }
1310
1311         /* Allocate memory for storing MAC addresses */
1312         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1313         if (eth_dev->data->mac_addrs == NULL) {
1314                 PMD_INIT_LOG(ERR,
1315                         "Failed to allocate %d bytes needed to store MAC addresses",
1316                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1317                 return -ENOMEM;
1318         }
1319
1320         pci_dev = eth_dev->pci_dev;
1321
1322         if (pci_dev) {
1323                 ret = vtpci_init(pci_dev, hw, &dev_flags);
1324                 if (ret)
1325                         return ret;
1326         }
1327
1328         eth_dev->data->dev_flags = dev_flags;
1329
1330         /* reset device and negotiate default features */
1331         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1332         if (ret < 0)
1333                 return ret;
1334
1335         /* Setup interrupt callback  */
1336         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1337                 rte_intr_callback_register(&pci_dev->intr_handle,
1338                         virtio_interrupt_handler, eth_dev);
1339
1340         return 0;
1341 }
1342
1343 static int
1344 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1345 {
1346         struct rte_pci_device *pci_dev;
1347         struct virtio_hw *hw = eth_dev->data->dev_private;
1348
1349         PMD_INIT_FUNC_TRACE();
1350
1351         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1352                 return -EPERM;
1353
1354         if (hw->started == 1) {
1355                 virtio_dev_stop(eth_dev);
1356                 virtio_dev_close(eth_dev);
1357         }
1358         pci_dev = eth_dev->pci_dev;
1359
1360         eth_dev->dev_ops = NULL;
1361         eth_dev->tx_pkt_burst = NULL;
1362         eth_dev->rx_pkt_burst = NULL;
1363
1364         rte_free(eth_dev->data->mac_addrs);
1365         eth_dev->data->mac_addrs = NULL;
1366
1367         /* reset interrupt callback  */
1368         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1369                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1370                                                 virtio_interrupt_handler,
1371                                                 eth_dev);
1372         rte_eal_pci_unmap_device(pci_dev);
1373
1374         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1375
1376         return 0;
1377 }
1378
1379 static struct eth_driver rte_virtio_pmd = {
1380         .pci_drv = {
1381                 .driver = {
1382                         .name = "net_virtio",
1383                 },
1384                 .id_table = pci_id_virtio_map,
1385                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1386                 .probe = rte_eth_dev_pci_probe,
1387                 .remove = rte_eth_dev_pci_remove,
1388         },
1389         .eth_dev_init = eth_virtio_dev_init,
1390         .eth_dev_uninit = eth_virtio_dev_uninit,
1391         .dev_private_size = sizeof(struct virtio_hw),
1392 };
1393
1394 RTE_INIT(rte_virtio_pmd_init);
1395 static void
1396 rte_virtio_pmd_init(void)
1397 {
1398         if (rte_eal_iopl_init() != 0) {
1399                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1400                 return;
1401         }
1402
1403         rte_eal_pci_register(&rte_virtio_pmd.pci_drv);
1404 }
1405
1406 /*
1407  * Configure virtio device
1408  * It returns 0 on success.
1409  */
1410 static int
1411 virtio_dev_configure(struct rte_eth_dev *dev)
1412 {
1413         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1414         struct virtio_hw *hw = dev->data->dev_private;
1415         uint64_t req_features;
1416         int ret;
1417
1418         PMD_INIT_LOG(DEBUG, "configure");
1419         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1420         if (rxmode->hw_ip_checksum)
1421                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1422         if (rxmode->enable_lro)
1423                 req_features |=
1424                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1425                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1426
1427         /* if request features changed, reinit the device */
1428         if (req_features != hw->req_guest_features) {
1429                 ret = virtio_init_device(dev, req_features);
1430                 if (ret < 0)
1431                         return ret;
1432         }
1433
1434         if (rxmode->hw_ip_checksum &&
1435                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1436                 PMD_DRV_LOG(NOTICE,
1437                         "rx ip checksum not available on this host");
1438                 return -ENOTSUP;
1439         }
1440
1441         if (rxmode->enable_lro &&
1442                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1443                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1444                 PMD_DRV_LOG(NOTICE,
1445                         "lro not available on this host");
1446                 return -ENOTSUP;
1447         }
1448
1449         /* start control queue */
1450         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1451                 virtio_dev_cq_start(dev);
1452
1453         hw->vlan_strip = rxmode->hw_vlan_strip;
1454
1455         if (rxmode->hw_vlan_filter
1456             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1457                 PMD_DRV_LOG(NOTICE,
1458                             "vlan filtering not available on this host");
1459                 return -ENOTSUP;
1460         }
1461
1462         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1463                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1464                         PMD_DRV_LOG(ERR, "failed to set config vector");
1465                         return -EBUSY;
1466                 }
1467
1468         return 0;
1469 }
1470
1471
1472 static int
1473 virtio_dev_start(struct rte_eth_dev *dev)
1474 {
1475         uint16_t nb_queues, i;
1476         struct virtio_hw *hw = dev->data->dev_private;
1477         struct virtnet_rx *rxvq;
1478         struct virtnet_tx *txvq __rte_unused;
1479
1480         /* check if lsc interrupt feature is enabled */
1481         if (dev->data->dev_conf.intr_conf.lsc) {
1482                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1483                         PMD_DRV_LOG(ERR, "link status not supported by host");
1484                         return -ENOTSUP;
1485                 }
1486
1487                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1488                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1489                         return -EIO;
1490                 }
1491         }
1492
1493         /* Initialize Link state */
1494         virtio_dev_link_update(dev, 0);
1495
1496         /* On restart after stop do not touch queues */
1497         if (hw->started)
1498                 return 0;
1499
1500         /* Do final configuration before rx/tx engine starts */
1501         virtio_dev_rxtx_start(dev);
1502         vtpci_reinit_complete(hw);
1503
1504         hw->started = 1;
1505
1506         /*Notify the backend
1507          *Otherwise the tap backend might already stop its queue due to fullness.
1508          *vhost backend will have no chance to be waked up
1509          */
1510         nb_queues = dev->data->nb_rx_queues;
1511         if (nb_queues > 1) {
1512                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1513                         return -EINVAL;
1514         }
1515
1516         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1517
1518         for (i = 0; i < nb_queues; i++) {
1519                 rxvq = dev->data->rx_queues[i];
1520                 virtqueue_notify(rxvq->vq);
1521         }
1522
1523         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1524
1525         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1526                 rxvq = dev->data->rx_queues[i];
1527                 VIRTQUEUE_DUMP(rxvq->vq);
1528         }
1529
1530         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1531                 txvq = dev->data->tx_queues[i];
1532                 VIRTQUEUE_DUMP(txvq->vq);
1533         }
1534
1535         return 0;
1536 }
1537
1538 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1539 {
1540         struct rte_mbuf *buf;
1541         int i, mbuf_num = 0;
1542
1543         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1544                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1545
1546                 PMD_INIT_LOG(DEBUG,
1547                              "Before freeing rxq[%d] used and unused buf", i);
1548                 VIRTQUEUE_DUMP(rxvq->vq);
1549
1550                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1551                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1552                         rte_pktmbuf_free(buf);
1553                         mbuf_num++;
1554                 }
1555
1556                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1557                 PMD_INIT_LOG(DEBUG,
1558                              "After freeing rxq[%d] used and unused buf", i);
1559                 VIRTQUEUE_DUMP(rxvq->vq);
1560         }
1561
1562         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1563                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1564
1565                 PMD_INIT_LOG(DEBUG,
1566                              "Before freeing txq[%d] used and unused bufs",
1567                              i);
1568                 VIRTQUEUE_DUMP(txvq->vq);
1569
1570                 mbuf_num = 0;
1571                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1572                         rte_pktmbuf_free(buf);
1573                         mbuf_num++;
1574                 }
1575
1576                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1577                 PMD_INIT_LOG(DEBUG,
1578                              "After freeing txq[%d] used and unused buf", i);
1579                 VIRTQUEUE_DUMP(txvq->vq);
1580         }
1581 }
1582
1583 /*
1584  * Stop device: disable interrupt and mark link down
1585  */
1586 static void
1587 virtio_dev_stop(struct rte_eth_dev *dev)
1588 {
1589         struct rte_eth_link link;
1590
1591         PMD_INIT_LOG(DEBUG, "stop");
1592
1593         if (dev->data->dev_conf.intr_conf.lsc)
1594                 rte_intr_disable(&dev->pci_dev->intr_handle);
1595
1596         memset(&link, 0, sizeof(link));
1597         virtio_dev_atomic_write_link_status(dev, &link);
1598 }
1599
1600 static int
1601 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1602 {
1603         struct rte_eth_link link, old;
1604         uint16_t status;
1605         struct virtio_hw *hw = dev->data->dev_private;
1606         memset(&link, 0, sizeof(link));
1607         virtio_dev_atomic_read_link_status(dev, &link);
1608         old = link;
1609         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1610         link.link_speed  = SPEED_10G;
1611
1612         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1613                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1614                 vtpci_read_dev_config(hw,
1615                                 offsetof(struct virtio_net_config, status),
1616                                 &status, sizeof(status));
1617                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1618                         link.link_status = ETH_LINK_DOWN;
1619                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1620                                      dev->data->port_id);
1621                 } else {
1622                         link.link_status = ETH_LINK_UP;
1623                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1624                                      dev->data->port_id);
1625                 }
1626         } else {
1627                 link.link_status = ETH_LINK_UP;
1628         }
1629         virtio_dev_atomic_write_link_status(dev, &link);
1630
1631         return (old.link_status == link.link_status) ? -1 : 0;
1632 }
1633
1634 static void
1635 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1636 {
1637         uint64_t tso_mask;
1638         struct virtio_hw *hw = dev->data->dev_private;
1639
1640         if (dev->pci_dev)
1641                 dev_info->driver_name = dev->driver->pci_drv.driver.name;
1642         else
1643                 dev_info->driver_name = "virtio_user PMD";
1644         dev_info->max_rx_queues =
1645                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1646         dev_info->max_tx_queues =
1647                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1648         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1649         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1650         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1651         dev_info->default_txconf = (struct rte_eth_txconf) {
1652                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1653         };
1654         dev_info->rx_offload_capa =
1655                 DEV_RX_OFFLOAD_TCP_CKSUM |
1656                 DEV_RX_OFFLOAD_UDP_CKSUM |
1657                 DEV_RX_OFFLOAD_TCP_LRO;
1658         dev_info->tx_offload_capa = 0;
1659
1660         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1661                 dev_info->tx_offload_capa |=
1662                         DEV_TX_OFFLOAD_UDP_CKSUM |
1663                         DEV_TX_OFFLOAD_TCP_CKSUM;
1664         }
1665
1666         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1667                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1668         if ((hw->guest_features & tso_mask) == tso_mask)
1669                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1670 }
1671
1672 /*
1673  * It enables testpmd to collect per queue stats.
1674  */
1675 static int
1676 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1677 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1678 __rte_unused uint8_t is_rx)
1679 {
1680         return 0;
1681 }
1682
1683 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1684 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);