drivers/net/virtio/virtio_ethdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <string.h>
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <unistd.h>
  10
  11 #include <rte_ethdev_driver.h>
  12 #include <rte_ethdev_pci.h>
  13 #include <rte_memcpy.h>
  14 #include <rte_string_fns.h>
  15 #include <rte_memzone.h>
  16 #include <rte_malloc.h>
  17 #include <rte_branch_prediction.h>
  18 #include <rte_pci.h>
  19 #include <rte_bus_pci.h>
  20 #include <rte_ether.h>
  21 #include <rte_ip.h>
  22 #include <rte_arp.h>
  23 #include <rte_common.h>
  24 #include <rte_errno.h>
  25 #include <rte_cpuflags.h>
  26
  27 #include <rte_memory.h>
  28 #include <rte_eal.h>
  29 #include <rte_dev.h>
  30 #include <rte_cycles.h>
  31 #include <rte_kvargs.h>
  32
  33 #include "virtio_ethdev.h"
  34 #include "virtio_pci.h"
  35 #include "virtio_logs.h"
  36 #include "virtqueue.h"
  37 #include "virtio_rxtx.h"
  38 #include "virtio_user/virtio_user_dev.h"
  39
  40 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  41 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  42 static int  virtio_dev_start(struct rte_eth_dev *dev);
  43 static void virtio_dev_stop(struct rte_eth_dev *dev);
  44 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  45 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  46 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  47 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  48 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  49                                 struct rte_eth_dev_info *dev_info);
  50 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  51         int wait_to_complete);
  52 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  53
  54 static void virtio_set_hwaddr(struct virtio_hw *hw);
  55 static void virtio_get_hwaddr(struct virtio_hw *hw);
  56
  57 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  58                                  struct rte_eth_stats *stats);
  59 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  60                                  struct rte_eth_xstat *xstats, unsigned n);
  61 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  62                                        struct rte_eth_xstat_name *xstats_names,
  63                                        unsigned limit);
  64 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  65 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  66 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  67                                 uint16_t vlan_id, int on);
  68 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  69                                 struct rte_ether_addr *mac_addr,
  70                                 uint32_t index, uint32_t vmdq);
  71 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  72 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
  73                                 struct rte_ether_addr *mac_addr);
  74
  75 static int virtio_intr_disable(struct rte_eth_dev *dev);
  76
  77 static int virtio_dev_queue_stats_mapping_set(
  78         struct rte_eth_dev *eth_dev,
  79         uint16_t queue_id,
  80         uint8_t stat_idx,
  81         uint8_t is_rx);
  82
  83 int virtio_logtype_init;
  84 int virtio_logtype_driver;
  85
  86 static void virtio_notify_peers(struct rte_eth_dev *dev);
  87 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  88
  89 /*
  90  * The set of PCI devices this driver supports
  91  */
  92 static const struct rte_pci_id pci_id_virtio_map[] = {
  93         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  94         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  95         { .vendor_id = 0, /* sentinel */ },
  96 };
  97
  98 struct rte_virtio_xstats_name_off {
  99         char name[RTE_ETH_XSTATS_NAME_SIZE];
 100         unsigned offset;
 101 };
 102
 103 /* [rt]x_qX_ is prepended to the name string here */
 104 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 105         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 106         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 107         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 108         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 109         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 110         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 111         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 112         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 113         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 114         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 115         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 116         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 117         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 118 };
 119
 120 /* [rt]x_qX_ is prepended to the name string here */
 121 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 122         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 123         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 124         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 125         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 126         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 127         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 128         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 129         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 130         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 131         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 132         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 133         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 134 };
 135
 136 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 137                             sizeof(rte_virtio_rxq_stat_strings[0]))
 138 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 139                             sizeof(rte_virtio_txq_stat_strings[0]))
 140
 141 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 142
 143 static struct virtio_pmd_ctrl *
 144 virtio_send_command_packed(struct virtnet_ctl *cvq,
 145                            struct virtio_pmd_ctrl *ctrl,
 146                            int *dlen, int pkt_num)
 147 {
 148         struct virtqueue *vq = cvq->vq;
 149         int head;
 150         struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
 151         struct virtio_pmd_ctrl *result;
 152         uint16_t flags;
 153         int sum = 0;
 154         int nb_descs = 0;
 155         int k;
 156
 157         /*
 158          * Format is enforced in qemu code:
 159          * One TX packet for header;
 160          * At least one TX packet per argument;
 161          * One RX packet for ACK.
 162          */
 163         head = vq->vq_avail_idx;
 164         flags = vq->vq_packed.cached_flags;
 165         desc[head].addr = cvq->virtio_net_hdr_mem;
 166         desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 167         vq->vq_free_cnt--;
 168         nb_descs++;
 169         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 170                 vq->vq_avail_idx -= vq->vq_nentries;
 171                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 172         }
 173
 174         for (k = 0; k < pkt_num; k++) {
 175                 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 176                         + sizeof(struct virtio_net_ctrl_hdr)
 177                         + sizeof(ctrl->status) + sizeof(uint8_t) * sum;
 178                 desc[vq->vq_avail_idx].len = dlen[k];
 179                 desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
 180                         vq->vq_packed.cached_flags;
 181                 sum += dlen[k];
 182                 vq->vq_free_cnt--;
 183                 nb_descs++;
 184                 if (++vq->vq_avail_idx >= vq->vq_nentries) {
 185                         vq->vq_avail_idx -= vq->vq_nentries;
 186                         vq->vq_packed.cached_flags ^=
 187                                 VRING_PACKED_DESC_F_AVAIL_USED;
 188                 }
 189         }
 190
 191         desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 192                 + sizeof(struct virtio_net_ctrl_hdr);
 193         desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
 194         desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
 195                 vq->vq_packed.cached_flags;
 196         vq->vq_free_cnt--;
 197         nb_descs++;
 198         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 199                 vq->vq_avail_idx -= vq->vq_nentries;
 200                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 201         }
 202
 203         virtio_wmb(vq->hw->weak_barriers);
 204         desc[head].flags = VRING_DESC_F_NEXT | flags;
 205
 206         virtio_wmb(vq->hw->weak_barriers);
 207         virtqueue_notify(vq);
 208
 209         /* wait for used descriptors in virtqueue */
 210         while (!desc_is_used(&desc[head], vq))
 211                 usleep(100);
 212
 213         virtio_rmb(vq->hw->weak_barriers);
 214
 215         /* now get used descriptors */
 216         vq->vq_free_cnt += nb_descs;
 217         vq->vq_used_cons_idx += nb_descs;
 218         if (vq->vq_used_cons_idx >= vq->vq_nentries) {
 219                 vq->vq_used_cons_idx -= vq->vq_nentries;
 220                 vq->vq_packed.used_wrap_counter ^= 1;
 221         }
 222
 223         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
 224                         "vq->vq_avail_idx=%d\n"
 225                         "vq->vq_used_cons_idx=%d\n"
 226                         "vq->vq_packed.cached_flags=0x%x\n"
 227                         "vq->vq_packed.used_wrap_counter=%d\n",
 228                         vq->vq_free_cnt,
 229                         vq->vq_avail_idx,
 230                         vq->vq_used_cons_idx,
 231                         vq->vq_packed.cached_flags,
 232                         vq->vq_packed.used_wrap_counter);
 233
 234         result = cvq->virtio_net_hdr_mz->addr;
 235         return result;
 236 }
 237
 238 static struct virtio_pmd_ctrl *
 239 virtio_send_command_split(struct virtnet_ctl *cvq,
 240                           struct virtio_pmd_ctrl *ctrl,
 241                           int *dlen, int pkt_num)
 242 {
 243         struct virtio_pmd_ctrl *result;
 244         struct virtqueue *vq = cvq->vq;
 245         uint32_t head, i;
 246         int k, sum = 0;
 247
 248         head = vq->vq_desc_head_idx;
 249
 250         /*
 251          * Format is enforced in qemu code:
 252          * One TX packet for header;
 253          * At least one TX packet per argument;
 254          * One RX packet for ACK.
 255          */
 256         vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
 257         vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 258         vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 259         vq->vq_free_cnt--;
 260         i = vq->vq_split.ring.desc[head].next;
 261
 262         for (k = 0; k < pkt_num; k++) {
 263                 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
 264                 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 265                         + sizeof(struct virtio_net_ctrl_hdr)
 266                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 267                 vq->vq_split.ring.desc[i].len = dlen[k];
 268                 sum += dlen[k];
 269                 vq->vq_free_cnt--;
 270                 i = vq->vq_split.ring.desc[i].next;
 271         }
 272
 273         vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
 274         vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 275                         + sizeof(struct virtio_net_ctrl_hdr);
 276         vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
 277         vq->vq_free_cnt--;
 278
 279         vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
 280
 281         vq_update_avail_ring(vq, head);
 282         vq_update_avail_idx(vq);
 283
 284         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 285
 286         virtqueue_notify(vq);
 287
 288         rte_rmb();
 289         while (VIRTQUEUE_NUSED(vq) == 0) {
 290                 rte_rmb();
 291                 usleep(100);
 292         }
 293
 294         while (VIRTQUEUE_NUSED(vq)) {
 295                 uint32_t idx, desc_idx, used_idx;
 296                 struct vring_used_elem *uep;
 297
 298                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 299                                 & (vq->vq_nentries - 1));
 300                 uep = &vq->vq_split.ring.used->ring[used_idx];
 301                 idx = (uint32_t) uep->id;
 302                 desc_idx = idx;
 303
 304                 while (vq->vq_split.ring.desc[desc_idx].flags &
 305                                 VRING_DESC_F_NEXT) {
 306                         desc_idx = vq->vq_split.ring.desc[desc_idx].next;
 307                         vq->vq_free_cnt++;
 308                 }
 309
 310                 vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 311                 vq->vq_desc_head_idx = idx;
 312
 313                 vq->vq_used_cons_idx++;
 314                 vq->vq_free_cnt++;
 315         }
 316
 317         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 318                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 319
 320         result = cvq->virtio_net_hdr_mz->addr;
 321         return result;
 322 }
 323
 324 static int
 325 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 326                     int *dlen, int pkt_num)
 327 {
 328         virtio_net_ctrl_ack status = ~0;
 329         struct virtio_pmd_ctrl *result;
 330         struct virtqueue *vq;
 331
 332         ctrl->status = status;
 333
 334         if (!cvq || !cvq->vq) {
 335                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 336                 return -1;
 337         }
 338
 339         rte_spinlock_lock(&cvq->lock);
 340         vq = cvq->vq;
 341
 342         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 343                 "vq->hw->cvq = %p vq = %p",
 344                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 345
 346         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 347                 rte_spinlock_unlock(&cvq->lock);
 348                 return -1;
 349         }
 350
 351         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 352                 sizeof(struct virtio_pmd_ctrl));
 353
 354         if (vtpci_packed_queue(vq->hw))
 355                 result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
 356         else
 357                 result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
 358
 359         rte_spinlock_unlock(&cvq->lock);
 360         return result->status;
 361 }
 362
 363 static int
 364 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 365 {
 366         struct virtio_hw *hw = dev->data->dev_private;
 367         struct virtio_pmd_ctrl ctrl;
 368         int dlen[1];
 369         int ret;
 370
 371         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 372         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 373         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 374
 375         dlen[0] = sizeof(uint16_t);
 376
 377         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 378         if (ret) {
 379                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 380                           "failed, this is too late now...");
 381                 return -EINVAL;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static void
 388 virtio_dev_queue_release(void *queue __rte_unused)
 389 {
 390         /* do nothing */
 391 }
 392
 393 static uint16_t
 394 virtio_get_nr_vq(struct virtio_hw *hw)
 395 {
 396         uint16_t nr_vq = hw->max_queue_pairs * 2;
 397
 398         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 399                 nr_vq += 1;
 400
 401         return nr_vq;
 402 }
 403
 404 static void
 405 virtio_init_vring(struct virtqueue *vq)
 406 {
 407         int size = vq->vq_nentries;
 408         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 409
 410         PMD_INIT_FUNC_TRACE();
 411
 412         memset(ring_mem, 0, vq->vq_ring_size);
 413
 414         vq->vq_used_cons_idx = 0;
 415         vq->vq_desc_head_idx = 0;
 416         vq->vq_avail_idx = 0;
 417         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 418         vq->vq_free_cnt = vq->vq_nentries;
 419         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 420         if (vtpci_packed_queue(vq->hw)) {
 421                 vring_init_packed(&vq->vq_packed.ring, ring_mem,
 422                                   VIRTIO_PCI_VRING_ALIGN, size);
 423                 vring_desc_init_packed(vq, size);
 424         } else {
 425                 struct vring *vr = &vq->vq_split.ring;
 426
 427                 vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size);
 428                 vring_desc_init_split(vr->desc, size);
 429         }
 430         /*
 431          * Disable device(host) interrupting guest
 432          */
 433         virtqueue_disable_intr(vq);
 434 }
 435
 436 static int
 437 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 438 {
 439         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 440         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 441         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 442         unsigned int vq_size, size;
 443         struct virtio_hw *hw = dev->data->dev_private;
 444         struct virtnet_rx *rxvq = NULL;
 445         struct virtnet_tx *txvq = NULL;
 446         struct virtnet_ctl *cvq = NULL;
 447         struct virtqueue *vq;
 448         size_t sz_hdr_mz = 0;
 449         void *sw_ring = NULL;
 450         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 451         int ret;
 452         int numa_node = dev->device->numa_node;
 453
 454         PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
 455                         vtpci_queue_idx, numa_node);
 456
 457         /*
 458          * Read the virtqueue size from the Queue Size field
 459          * Always power of 2 and if 0 virtqueue does not exist
 460          */
 461         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 462         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 463         if (vq_size == 0) {
 464                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 465                 return -EINVAL;
 466         }
 467
 468         if (!rte_is_power_of_2(vq_size)) {
 469                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 470                 return -EINVAL;
 471         }
 472
 473         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 474                  dev->data->port_id, vtpci_queue_idx);
 475
 476         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 477                                 vq_size * sizeof(struct vq_desc_extra),
 478                                 RTE_CACHE_LINE_SIZE);
 479         if (queue_type == VTNET_TQ) {
 480                 /*
 481                  * For each xmit packet, allocate a virtio_net_hdr
 482                  * and indirect ring elements
 483                  */
 484                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 485         } else if (queue_type == VTNET_CQ) {
 486                 /* Allocate a page for control vq command, data and status */
 487                 sz_hdr_mz = PAGE_SIZE;
 488         }
 489
 490         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 491                                 numa_node);
 492         if (vq == NULL) {
 493                 PMD_INIT_LOG(ERR, "can not allocate vq");
 494                 return -ENOMEM;
 495         }
 496         hw->vqs[vtpci_queue_idx] = vq;
 497
 498         vq->hw = hw;
 499         vq->vq_queue_index = vtpci_queue_idx;
 500         vq->vq_nentries = vq_size;
 501         if (vtpci_packed_queue(hw)) {
 502                 vq->vq_packed.used_wrap_counter = 1;
 503                 vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
 504                 vq->vq_packed.event_flags_shadow = 0;
 505                 if (queue_type == VTNET_RQ)
 506                         vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
 507         }
 508
 509         /*
 510          * Reserve a memzone for vring elements
 511          */
 512         size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN);
 513         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 514         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 515                      size, vq->vq_ring_size);
 516
 517         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 518                         numa_node, RTE_MEMZONE_IOVA_CONTIG,
 519                         VIRTIO_PCI_VRING_ALIGN);
 520         if (mz == NULL) {
 521                 if (rte_errno == EEXIST)
 522                         mz = rte_memzone_lookup(vq_name);
 523                 if (mz == NULL) {
 524                         ret = -ENOMEM;
 525                         goto fail_q_alloc;
 526                 }
 527         }
 528
 529         memset(mz->addr, 0, mz->len);
 530
 531         vq->vq_ring_mem = mz->iova;
 532         vq->vq_ring_virt_mem = mz->addr;
 533         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 534                      (uint64_t)mz->iova);
 535         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 536                      (uint64_t)(uintptr_t)mz->addr);
 537
 538         virtio_init_vring(vq);
 539
 540         if (sz_hdr_mz) {
 541                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 542                          dev->data->port_id, vtpci_queue_idx);
 543                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 544                                 numa_node, RTE_MEMZONE_IOVA_CONTIG,
 545                                 RTE_CACHE_LINE_SIZE);
 546                 if (hdr_mz == NULL) {
 547                         if (rte_errno == EEXIST)
 548                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 549                         if (hdr_mz == NULL) {
 550                                 ret = -ENOMEM;
 551                                 goto fail_q_alloc;
 552                         }
 553                 }
 554         }
 555
 556         if (queue_type == VTNET_RQ) {
 557                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 558                                sizeof(vq->sw_ring[0]);
 559
 560                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 561                                 RTE_CACHE_LINE_SIZE, numa_node);
 562                 if (!sw_ring) {
 563                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 564                         ret = -ENOMEM;
 565                         goto fail_q_alloc;
 566                 }
 567
 568                 vq->sw_ring = sw_ring;
 569                 rxvq = &vq->rxq;
 570                 rxvq->vq = vq;
 571                 rxvq->port_id = dev->data->port_id;
 572                 rxvq->mz = mz;
 573         } else if (queue_type == VTNET_TQ) {
 574                 txvq = &vq->txq;
 575                 txvq->vq = vq;
 576                 txvq->port_id = dev->data->port_id;
 577                 txvq->mz = mz;
 578                 txvq->virtio_net_hdr_mz = hdr_mz;
 579                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 580         } else if (queue_type == VTNET_CQ) {
 581                 cvq = &vq->cq;
 582                 cvq->vq = vq;
 583                 cvq->mz = mz;
 584                 cvq->virtio_net_hdr_mz = hdr_mz;
 585                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 586                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 587
 588                 hw->cvq = cvq;
 589         }
 590
 591         /* For virtio_user case (that is when hw->dev is NULL), we use
 592          * virtual address. And we need properly set _offset_, please see
 593          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 594          */
 595         if (!hw->virtio_user_dev)
 596                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 597         else {
 598                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 599                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 600                 if (queue_type == VTNET_TQ)
 601                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 602                 else if (queue_type == VTNET_CQ)
 603                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 604         }
 605
 606         if (queue_type == VTNET_TQ) {
 607                 struct virtio_tx_region *txr;
 608                 unsigned int i;
 609
 610                 txr = hdr_mz->addr;
 611                 memset(txr, 0, vq_size * sizeof(*txr));
 612                 for (i = 0; i < vq_size; i++) {
 613                         struct vring_desc *start_dp = txr[i].tx_indir;
 614
 615                         /* first indirect descriptor is always the tx header */
 616                         if (!vtpci_packed_queue(hw)) {
 617                                 vring_desc_init_split(start_dp,
 618                                                       RTE_DIM(txr[i].tx_indir));
 619                                 start_dp->addr = txvq->virtio_net_hdr_mem
 620                                         + i * sizeof(*txr)
 621                                         + offsetof(struct virtio_tx_region,
 622                                                    tx_hdr);
 623                                 start_dp->len = hw->vtnet_hdr_size;
 624                                 start_dp->flags = VRING_DESC_F_NEXT;
 625                         }
 626                 }
 627         }
 628
 629         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 630                 PMD_INIT_LOG(ERR, "setup_queue failed");
 631                 return -EINVAL;
 632         }
 633
 634         return 0;
 635
 636 fail_q_alloc:
 637         rte_free(sw_ring);
 638         rte_memzone_free(hdr_mz);
 639         rte_memzone_free(mz);
 640         rte_free(vq);
 641
 642         return ret;
 643 }
 644
 645 static void
 646 virtio_free_queues(struct virtio_hw *hw)
 647 {
 648         uint16_t nr_vq = virtio_get_nr_vq(hw);
 649         struct virtqueue *vq;
 650         int queue_type;
 651         uint16_t i;
 652
 653         if (hw->vqs == NULL)
 654                 return;
 655
 656         for (i = 0; i < nr_vq; i++) {
 657                 vq = hw->vqs[i];
 658                 if (!vq)
 659                         continue;
 660
 661                 queue_type = virtio_get_queue_type(hw, i);
 662                 if (queue_type == VTNET_RQ) {
 663                         rte_free(vq->sw_ring);
 664                         rte_memzone_free(vq->rxq.mz);
 665                 } else if (queue_type == VTNET_TQ) {
 666                         rte_memzone_free(vq->txq.mz);
 667                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 668                 } else {
 669                         rte_memzone_free(vq->cq.mz);
 670                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 671                 }
 672
 673                 rte_free(vq);
 674                 hw->vqs[i] = NULL;
 675         }
 676
 677         rte_free(hw->vqs);
 678         hw->vqs = NULL;
 679 }
 680
 681 static int
 682 virtio_alloc_queues(struct rte_eth_dev *dev)
 683 {
 684         struct virtio_hw *hw = dev->data->dev_private;
 685         uint16_t nr_vq = virtio_get_nr_vq(hw);
 686         uint16_t i;
 687         int ret;
 688
 689         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 690         if (!hw->vqs) {
 691                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 692                 return -ENOMEM;
 693         }
 694
 695         for (i = 0; i < nr_vq; i++) {
 696                 ret = virtio_init_queue(dev, i);
 697                 if (ret < 0) {
 698                         virtio_free_queues(hw);
 699                         return ret;
 700                 }
 701         }
 702
 703         return 0;
 704 }
 705
 706 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 707
 708 static void
 709 virtio_dev_close(struct rte_eth_dev *dev)
 710 {
 711         struct virtio_hw *hw = dev->data->dev_private;
 712         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 713
 714         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 715
 716         if (!hw->opened)
 717                 return;
 718         hw->opened = false;
 719
 720         /* reset the NIC */
 721         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 722                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 723         if (intr_conf->rxq)
 724                 virtio_queues_unbind_intr(dev);
 725
 726         if (intr_conf->lsc || intr_conf->rxq) {
 727                 virtio_intr_disable(dev);
 728                 rte_intr_efd_disable(dev->intr_handle);
 729                 rte_free(dev->intr_handle->intr_vec);
 730                 dev->intr_handle->intr_vec = NULL;
 731         }
 732
 733         vtpci_reset(hw);
 734         virtio_dev_free_mbufs(dev);
 735         virtio_free_queues(hw);
 736
 737 #ifdef RTE_VIRTIO_USER
 738         if (hw->virtio_user_dev)
 739                 virtio_user_dev_uninit(hw->virtio_user_dev);
 740         else
 741 #endif
 742         if (dev->device) {
 743                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(dev));
 744                 if (!hw->modern)
 745                         rte_pci_ioport_unmap(VTPCI_IO(hw));
 746         }
 747 }
 748
 749 static void
 750 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 751 {
 752         struct virtio_hw *hw = dev->data->dev_private;
 753         struct virtio_pmd_ctrl ctrl;
 754         int dlen[1];
 755         int ret;
 756
 757         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 758                 PMD_INIT_LOG(INFO, "host does not support rx control");
 759                 return;
 760         }
 761
 762         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 763         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 764         ctrl.data[0] = 1;
 765         dlen[0] = 1;
 766
 767         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 768         if (ret)
 769                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 770 }
 771
 772 static void
 773 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 774 {
 775         struct virtio_hw *hw = dev->data->dev_private;
 776         struct virtio_pmd_ctrl ctrl;
 777         int dlen[1];
 778         int ret;
 779
 780         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 781                 PMD_INIT_LOG(INFO, "host does not support rx control");
 782                 return;
 783         }
 784
 785         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 786         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 787         ctrl.data[0] = 0;
 788         dlen[0] = 1;
 789
 790         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 791         if (ret)
 792                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 793 }
 794
 795 static void
 796 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 797 {
 798         struct virtio_hw *hw = dev->data->dev_private;
 799         struct virtio_pmd_ctrl ctrl;
 800         int dlen[1];
 801         int ret;
 802
 803         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 804                 PMD_INIT_LOG(INFO, "host does not support rx control");
 805                 return;
 806         }
 807
 808         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 809         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 810         ctrl.data[0] = 1;
 811         dlen[0] = 1;
 812
 813         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 814         if (ret)
 815                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 816 }
 817
 818 static void
 819 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 820 {
 821         struct virtio_hw *hw = dev->data->dev_private;
 822         struct virtio_pmd_ctrl ctrl;
 823         int dlen[1];
 824         int ret;
 825
 826         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 827                 PMD_INIT_LOG(INFO, "host does not support rx control");
 828                 return;
 829         }
 830
 831         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 832         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 833         ctrl.data[0] = 0;
 834         dlen[0] = 1;
 835
 836         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 837         if (ret)
 838                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 839 }
 840
 841 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 842 static int
 843 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 844 {
 845         struct virtio_hw *hw = dev->data->dev_private;
 846         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 847                                  hw->vtnet_hdr_size;
 848         uint32_t frame_size = mtu + ether_hdr_len;
 849         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 850
 851         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 852
 853         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 854                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 855                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 856                 return -EINVAL;
 857         }
 858         return 0;
 859 }
 860
 861 static int
 862 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 863 {
 864         struct virtio_hw *hw = dev->data->dev_private;
 865         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 866         struct virtqueue *vq = rxvq->vq;
 867
 868         virtqueue_enable_intr(vq);
 869         virtio_mb(hw->weak_barriers);
 870         return 0;
 871 }
 872
 873 static int
 874 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 875 {
 876         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 877         struct virtqueue *vq = rxvq->vq;
 878
 879         virtqueue_disable_intr(vq);
 880         return 0;
 881 }
 882
 883 /*
 884  * dev_ops for virtio, bare necessities for basic operation
 885  */
 886 static const struct eth_dev_ops virtio_eth_dev_ops = {
 887         .dev_configure           = virtio_dev_configure,
 888         .dev_start               = virtio_dev_start,
 889         .dev_stop                = virtio_dev_stop,
 890         .dev_close               = virtio_dev_close,
 891         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 892         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 893         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 894         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 895         .mtu_set                 = virtio_mtu_set,
 896         .dev_infos_get           = virtio_dev_info_get,
 897         .stats_get               = virtio_dev_stats_get,
 898         .xstats_get              = virtio_dev_xstats_get,
 899         .xstats_get_names        = virtio_dev_xstats_get_names,
 900         .stats_reset             = virtio_dev_stats_reset,
 901         .xstats_reset            = virtio_dev_stats_reset,
 902         .link_update             = virtio_dev_link_update,
 903         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 904         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 905         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 906         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 907         .rx_queue_release        = virtio_dev_queue_release,
 908         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 909         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 910         .tx_queue_release        = virtio_dev_queue_release,
 911         /* collect stats per queue */
 912         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 913         .vlan_filter_set         = virtio_vlan_filter_set,
 914         .mac_addr_add            = virtio_mac_addr_add,
 915         .mac_addr_remove         = virtio_mac_addr_remove,
 916         .mac_addr_set            = virtio_mac_addr_set,
 917 };
 918
 919 /*
 920  * dev_ops for virtio-user in secondary processes, as we just have
 921  * some limited supports currently.
 922  */
 923 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 924         .dev_infos_get           = virtio_dev_info_get,
 925         .stats_get               = virtio_dev_stats_get,
 926         .xstats_get              = virtio_dev_xstats_get,
 927         .xstats_get_names        = virtio_dev_xstats_get_names,
 928         .stats_reset             = virtio_dev_stats_reset,
 929         .xstats_reset            = virtio_dev_stats_reset,
 930         /* collect stats per queue */
 931         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 932 };
 933
 934 static void
 935 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 936 {
 937         unsigned i;
 938
 939         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 940                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 941                 if (txvq == NULL)
 942                         continue;
 943
 944                 stats->opackets += txvq->stats.packets;
 945                 stats->obytes += txvq->stats.bytes;
 946
 947                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 948                         stats->q_opackets[i] = txvq->stats.packets;
 949                         stats->q_obytes[i] = txvq->stats.bytes;
 950                 }
 951         }
 952
 953         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 954                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 955                 if (rxvq == NULL)
 956                         continue;
 957
 958                 stats->ipackets += rxvq->stats.packets;
 959                 stats->ibytes += rxvq->stats.bytes;
 960                 stats->ierrors += rxvq->stats.errors;
 961
 962                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 963                         stats->q_ipackets[i] = rxvq->stats.packets;
 964                         stats->q_ibytes[i] = rxvq->stats.bytes;
 965                 }
 966         }
 967
 968         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 969 }
 970
 971 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 972                                        struct rte_eth_xstat_name *xstats_names,
 973                                        __rte_unused unsigned limit)
 974 {
 975         unsigned i;
 976         unsigned count = 0;
 977         unsigned t;
 978
 979         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 980                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 981
 982         if (xstats_names != NULL) {
 983                 /* Note: limit checked in rte_eth_xstats_names() */
 984
 985                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 986                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 987                         if (rxvq == NULL)
 988                                 continue;
 989                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 990                                 snprintf(xstats_names[count].name,
 991                                         sizeof(xstats_names[count].name),
 992                                         "rx_q%u_%s", i,
 993                                         rte_virtio_rxq_stat_strings[t].name);
 994                                 count++;
 995                         }
 996                 }
 997
 998                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 999                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1000                         if (txvq == NULL)
1001                                 continue;
1002                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1003                                 snprintf(xstats_names[count].name,
1004                                         sizeof(xstats_names[count].name),
1005                                         "tx_q%u_%s", i,
1006                                         rte_virtio_txq_stat_strings[t].name);
1007                                 count++;
1008                         }
1009                 }
1010                 return count;
1011         }
1012         return nstats;
1013 }
1014
1015 static int
1016 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1017                       unsigned n)
1018 {
1019         unsigned i;
1020         unsigned count = 0;
1021
1022         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1023                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1024
1025         if (n < nstats)
1026                 return nstats;
1027
1028         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1029                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1030
1031                 if (rxvq == NULL)
1032                         continue;
1033
1034                 unsigned t;
1035
1036                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1037                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1038                                 rte_virtio_rxq_stat_strings[t].offset);
1039                         xstats[count].id = count;
1040                         count++;
1041                 }
1042         }
1043
1044         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1045                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1046
1047                 if (txvq == NULL)
1048                         continue;
1049
1050                 unsigned t;
1051
1052                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1053                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1054                                 rte_virtio_txq_stat_strings[t].offset);
1055                         xstats[count].id = count;
1056                         count++;
1057                 }
1058         }
1059
1060         return count;
1061 }
1062
1063 static int
1064 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1065 {
1066         virtio_update_stats(dev, stats);
1067
1068         return 0;
1069 }
1070
1071 static void
1072 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1073 {
1074         unsigned int i;
1075
1076         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1077                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1078                 if (txvq == NULL)
1079                         continue;
1080
1081                 txvq->stats.packets = 0;
1082                 txvq->stats.bytes = 0;
1083                 txvq->stats.multicast = 0;
1084                 txvq->stats.broadcast = 0;
1085                 memset(txvq->stats.size_bins, 0,
1086                        sizeof(txvq->stats.size_bins[0]) * 8);
1087         }
1088
1089         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1090                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1091                 if (rxvq == NULL)
1092                         continue;
1093
1094                 rxvq->stats.packets = 0;
1095                 rxvq->stats.bytes = 0;
1096                 rxvq->stats.errors = 0;
1097                 rxvq->stats.multicast = 0;
1098                 rxvq->stats.broadcast = 0;
1099                 memset(rxvq->stats.size_bins, 0,
1100                        sizeof(rxvq->stats.size_bins[0]) * 8);
1101         }
1102 }
1103
1104 static void
1105 virtio_set_hwaddr(struct virtio_hw *hw)
1106 {
1107         vtpci_write_dev_config(hw,
1108                         offsetof(struct virtio_net_config, mac),
1109                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1110 }
1111
1112 static void
1113 virtio_get_hwaddr(struct virtio_hw *hw)
1114 {
1115         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1116                 vtpci_read_dev_config(hw,
1117                         offsetof(struct virtio_net_config, mac),
1118                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1119         } else {
1120                 rte_eth_random_addr(&hw->mac_addr[0]);
1121                 virtio_set_hwaddr(hw);
1122         }
1123 }
1124
1125 static int
1126 virtio_mac_table_set(struct virtio_hw *hw,
1127                      const struct virtio_net_ctrl_mac *uc,
1128                      const struct virtio_net_ctrl_mac *mc)
1129 {
1130         struct virtio_pmd_ctrl ctrl;
1131         int err, len[2];
1132
1133         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1134                 PMD_DRV_LOG(INFO, "host does not support mac table");
1135                 return -1;
1136         }
1137
1138         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1139         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1140
1141         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1142         memcpy(ctrl.data, uc, len[0]);
1143
1144         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1145         memcpy(ctrl.data + len[0], mc, len[1]);
1146
1147         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1148         if (err != 0)
1149                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1150         return err;
1151 }
1152
1153 static int
1154 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1155                     uint32_t index, uint32_t vmdq __rte_unused)
1156 {
1157         struct virtio_hw *hw = dev->data->dev_private;
1158         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1159         unsigned int i;
1160         struct virtio_net_ctrl_mac *uc, *mc;
1161
1162         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1163                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1164                 return -EINVAL;
1165         }
1166
1167         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1168                 sizeof(uc->entries));
1169         uc->entries = 0;
1170         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1171                 sizeof(mc->entries));
1172         mc->entries = 0;
1173
1174         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1175                 const struct rte_ether_addr *addr
1176                         = (i == index) ? mac_addr : addrs + i;
1177                 struct virtio_net_ctrl_mac *tbl
1178                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1179
1180                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1181         }
1182
1183         return virtio_mac_table_set(hw, uc, mc);
1184 }
1185
1186 static void
1187 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1188 {
1189         struct virtio_hw *hw = dev->data->dev_private;
1190         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1191         struct virtio_net_ctrl_mac *uc, *mc;
1192         unsigned int i;
1193
1194         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1195                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1196                 return;
1197         }
1198
1199         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1200                 sizeof(uc->entries));
1201         uc->entries = 0;
1202         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1203                 sizeof(mc->entries));
1204         mc->entries = 0;
1205
1206         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1207                 struct virtio_net_ctrl_mac *tbl;
1208
1209                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1210                         continue;
1211
1212                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1213                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1214                         RTE_ETHER_ADDR_LEN);
1215         }
1216
1217         virtio_mac_table_set(hw, uc, mc);
1218 }
1219
1220 static int
1221 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1222 {
1223         struct virtio_hw *hw = dev->data->dev_private;
1224
1225         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1226
1227         /* Use atomic update if available */
1228         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1229                 struct virtio_pmd_ctrl ctrl;
1230                 int len = RTE_ETHER_ADDR_LEN;
1231
1232                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1233                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1234
1235                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1236                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1237         }
1238
1239         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1240                 return -ENOTSUP;
1241
1242         virtio_set_hwaddr(hw);
1243         return 0;
1244 }
1245
1246 static int
1247 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1248 {
1249         struct virtio_hw *hw = dev->data->dev_private;
1250         struct virtio_pmd_ctrl ctrl;
1251         int len;
1252
1253         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1254                 return -ENOTSUP;
1255
1256         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1257         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1258         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1259         len = sizeof(vlan_id);
1260
1261         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1262 }
1263
1264 static int
1265 virtio_intr_unmask(struct rte_eth_dev *dev)
1266 {
1267         struct virtio_hw *hw = dev->data->dev_private;
1268
1269         if (rte_intr_ack(dev->intr_handle) < 0)
1270                 return -1;
1271
1272         if (!hw->virtio_user_dev)
1273                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1274
1275         return 0;
1276 }
1277
1278 static int
1279 virtio_intr_enable(struct rte_eth_dev *dev)
1280 {
1281         struct virtio_hw *hw = dev->data->dev_private;
1282
1283         if (rte_intr_enable(dev->intr_handle) < 0)
1284                 return -1;
1285
1286         if (!hw->virtio_user_dev)
1287                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1288
1289         return 0;
1290 }
1291
1292 static int
1293 virtio_intr_disable(struct rte_eth_dev *dev)
1294 {
1295         struct virtio_hw *hw = dev->data->dev_private;
1296
1297         if (rte_intr_disable(dev->intr_handle) < 0)
1298                 return -1;
1299
1300         if (!hw->virtio_user_dev)
1301                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1302
1303         return 0;
1304 }
1305
1306 static int
1307 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1308 {
1309         uint64_t host_features;
1310
1311         /* Prepare guest_features: feature that driver wants to support */
1312         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1313                 req_features);
1314
1315         /* Read device(host) feature bits */
1316         host_features = VTPCI_OPS(hw)->get_features(hw);
1317         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1318                 host_features);
1319
1320         /* If supported, ensure MTU value is valid before acknowledging it. */
1321         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1322                 struct virtio_net_config config;
1323
1324                 vtpci_read_dev_config(hw,
1325                         offsetof(struct virtio_net_config, mtu),
1326                         &config.mtu, sizeof(config.mtu));
1327
1328                 if (config.mtu < RTE_ETHER_MIN_MTU)
1329                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1330         }
1331
1332         /*
1333          * Negotiate features: Subset of device feature bits are written back
1334          * guest feature bits.
1335          */
1336         hw->guest_features = req_features;
1337         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1338         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1339                 hw->guest_features);
1340
1341         if (hw->modern) {
1342                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1343                         PMD_INIT_LOG(ERR,
1344                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1345                         return -1;
1346                 }
1347                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1348                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1349                         PMD_INIT_LOG(ERR,
1350                                 "failed to set FEATURES_OK status!");
1351                         return -1;
1352                 }
1353         }
1354
1355         hw->req_guest_features = req_features;
1356
1357         return 0;
1358 }
1359
1360 int
1361 virtio_dev_pause(struct rte_eth_dev *dev)
1362 {
1363         struct virtio_hw *hw = dev->data->dev_private;
1364
1365         rte_spinlock_lock(&hw->state_lock);
1366
1367         if (hw->started == 0) {
1368                 /* Device is just stopped. */
1369                 rte_spinlock_unlock(&hw->state_lock);
1370                 return -1;
1371         }
1372         hw->started = 0;
1373         /*
1374          * Prevent the worker threads from touching queues to avoid contention,
1375          * 1 ms should be enough for the ongoing Tx function to finish.
1376          */
1377         rte_delay_ms(1);
1378         return 0;
1379 }
1380
1381 /*
1382  * Recover hw state to let the worker threads continue.
1383  */
1384 void
1385 virtio_dev_resume(struct rte_eth_dev *dev)
1386 {
1387         struct virtio_hw *hw = dev->data->dev_private;
1388
1389         hw->started = 1;
1390         rte_spinlock_unlock(&hw->state_lock);
1391 }
1392
1393 /*
1394  * Should be called only after device is paused.
1395  */
1396 int
1397 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1398                 int nb_pkts)
1399 {
1400         struct virtio_hw *hw = dev->data->dev_private;
1401         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1402         int ret;
1403
1404         hw->inject_pkts = tx_pkts;
1405         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1406         hw->inject_pkts = NULL;
1407
1408         return ret;
1409 }
1410
1411 static void
1412 virtio_notify_peers(struct rte_eth_dev *dev)
1413 {
1414         struct virtio_hw *hw = dev->data->dev_private;
1415         struct virtnet_rx *rxvq;
1416         struct rte_mbuf *rarp_mbuf;
1417
1418         if (!dev->data->rx_queues)
1419                 return;
1420
1421         rxvq = dev->data->rx_queues[0];
1422         if (!rxvq)
1423                 return;
1424
1425         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1426                         (struct rte_ether_addr *)hw->mac_addr);
1427         if (rarp_mbuf == NULL) {
1428                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1429                 return;
1430         }
1431
1432         /* If virtio port just stopped, no need to send RARP */
1433         if (virtio_dev_pause(dev) < 0) {
1434                 rte_pktmbuf_free(rarp_mbuf);
1435                 return;
1436         }
1437
1438         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1439         virtio_dev_resume(dev);
1440 }
1441
1442 static void
1443 virtio_ack_link_announce(struct rte_eth_dev *dev)
1444 {
1445         struct virtio_hw *hw = dev->data->dev_private;
1446         struct virtio_pmd_ctrl ctrl;
1447
1448         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1449         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1450
1451         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1452 }
1453
1454 /*
1455  * Process virtio config changed interrupt. Call the callback
1456  * if link state changed, generate gratuitous RARP packet if
1457  * the status indicates an ANNOUNCE.
1458  */
1459 void
1460 virtio_interrupt_handler(void *param)
1461 {
1462         struct rte_eth_dev *dev = param;
1463         struct virtio_hw *hw = dev->data->dev_private;
1464         uint8_t isr;
1465         uint16_t status;
1466
1467         /* Read interrupt status which clears interrupt */
1468         isr = vtpci_isr(hw);
1469         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1470
1471         if (virtio_intr_unmask(dev) < 0)
1472                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1473
1474         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1475                 if (virtio_dev_link_update(dev, 0) == 0)
1476                         _rte_eth_dev_callback_process(dev,
1477                                                       RTE_ETH_EVENT_INTR_LSC,
1478                                                       NULL);
1479
1480                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1481                         vtpci_read_dev_config(hw,
1482                                 offsetof(struct virtio_net_config, status),
1483                                 &status, sizeof(status));
1484                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1485                                 virtio_notify_peers(dev);
1486                                 if (hw->cvq)
1487                                         virtio_ack_link_announce(dev);
1488                         }
1489                 }
1490         }
1491 }
1492
1493 /* set rx and tx handlers according to what is supported */
1494 static void
1495 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1496 {
1497         struct virtio_hw *hw = eth_dev->data->dev_private;
1498
1499         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1500         if (vtpci_packed_queue(hw)) {
1501                 PMD_INIT_LOG(INFO,
1502                         "virtio: using packed ring %s Tx path on port %u",
1503                         hw->use_inorder_tx ? "inorder" : "standard",
1504                         eth_dev->data->port_id);
1505                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1506         } else {
1507                 if (hw->use_inorder_tx) {
1508                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1509                                 eth_dev->data->port_id);
1510                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1511                 } else {
1512                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1513                                 eth_dev->data->port_id);
1514                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1515                 }
1516         }
1517
1518         if (vtpci_packed_queue(hw)) {
1519                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1520                         PMD_INIT_LOG(INFO,
1521                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1522                                 eth_dev->data->port_id);
1523                         eth_dev->rx_pkt_burst =
1524                                 &virtio_recv_mergeable_pkts_packed;
1525                 } else {
1526                         PMD_INIT_LOG(INFO,
1527                                 "virtio: using packed ring standard Rx path on port %u",
1528                                 eth_dev->data->port_id);
1529                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1530                 }
1531         } else {
1532                 if (hw->use_simple_rx) {
1533                         PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1534                                 eth_dev->data->port_id);
1535                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1536                 } else if (hw->use_inorder_rx) {
1537                         PMD_INIT_LOG(INFO,
1538                                 "virtio: using inorder Rx path on port %u",
1539                                 eth_dev->data->port_id);
1540                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1541                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1542                         PMD_INIT_LOG(INFO,
1543                                 "virtio: using mergeable buffer Rx path on port %u",
1544                                 eth_dev->data->port_id);
1545                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1546                 } else {
1547                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1548                                 eth_dev->data->port_id);
1549                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1550                 }
1551         }
1552
1553 }
1554
1555 /* Only support 1:1 queue/interrupt mapping so far.
1556  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1557  * interrupt vectors (<N+1).
1558  */
1559 static int
1560 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1561 {
1562         uint32_t i;
1563         struct virtio_hw *hw = dev->data->dev_private;
1564
1565         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1566         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1567                 dev->intr_handle->intr_vec[i] = i + 1;
1568                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1569                                                  VIRTIO_MSI_NO_VECTOR) {
1570                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1571                         return -EBUSY;
1572                 }
1573         }
1574
1575         return 0;
1576 }
1577
1578 static void
1579 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1580 {
1581         uint32_t i;
1582         struct virtio_hw *hw = dev->data->dev_private;
1583
1584         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1585         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1586                 VTPCI_OPS(hw)->set_queue_irq(hw,
1587                                              hw->vqs[i * VTNET_CQ],
1588                                              VIRTIO_MSI_NO_VECTOR);
1589 }
1590
1591 static int
1592 virtio_configure_intr(struct rte_eth_dev *dev)
1593 {
1594         struct virtio_hw *hw = dev->data->dev_private;
1595
1596         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1597                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1598                 return -ENOTSUP;
1599         }
1600
1601         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1602                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1603                 return -1;
1604         }
1605
1606         if (!dev->intr_handle->intr_vec) {
1607                 dev->intr_handle->intr_vec =
1608                         rte_zmalloc("intr_vec",
1609                                     hw->max_queue_pairs * sizeof(int), 0);
1610                 if (!dev->intr_handle->intr_vec) {
1611                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1612                                      hw->max_queue_pairs);
1613                         return -ENOMEM;
1614                 }
1615         }
1616
1617         /* Re-register callback to update max_intr */
1618         rte_intr_callback_unregister(dev->intr_handle,
1619                                      virtio_interrupt_handler,
1620                                      dev);
1621         rte_intr_callback_register(dev->intr_handle,
1622                                    virtio_interrupt_handler,
1623                                    dev);
1624
1625         /* DO NOT try to remove this! This function will enable msix, or QEMU
1626          * will encounter SIGSEGV when DRIVER_OK is sent.
1627          * And for legacy devices, this should be done before queue/vec binding
1628          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1629          * (22) will be ignored.
1630          */
1631         if (virtio_intr_enable(dev) < 0) {
1632                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1633                 return -1;
1634         }
1635
1636         if (virtio_queues_bind_intr(dev) < 0) {
1637                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1638                 return -1;
1639         }
1640
1641         return 0;
1642 }
1643
1644 /* reset device and renegotiate features if needed */
1645 static int
1646 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1647 {
1648         struct virtio_hw *hw = eth_dev->data->dev_private;
1649         struct virtio_net_config *config;
1650         struct virtio_net_config local_config;
1651         struct rte_pci_device *pci_dev = NULL;
1652         int ret;
1653
1654         /* Reset the device although not necessary at startup */
1655         vtpci_reset(hw);
1656
1657         if (hw->vqs) {
1658                 virtio_dev_free_mbufs(eth_dev);
1659                 virtio_free_queues(hw);
1660         }
1661
1662         /* Tell the host we've noticed this device. */
1663         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1664
1665         /* Tell the host we've known how to drive the device. */
1666         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1667         if (virtio_negotiate_features(hw, req_features) < 0)
1668                 return -1;
1669
1670         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1671
1672         if (!hw->virtio_user_dev)
1673                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1674
1675         /* If host does not support both status and MSI-X then disable LSC */
1676         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1677             hw->use_msix != VIRTIO_MSIX_NONE)
1678                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1679         else
1680                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1681
1682         /* Setting up rx_header size for the device */
1683         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1684             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1685             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1686                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1687         else
1688                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1689
1690         /* Copy the permanent MAC address to: virtio_hw */
1691         virtio_get_hwaddr(hw);
1692         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1693                         &eth_dev->data->mac_addrs[0]);
1694         PMD_INIT_LOG(DEBUG,
1695                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1696                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1697                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1698
1699         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1700                 config = &local_config;
1701
1702                 vtpci_read_dev_config(hw,
1703                         offsetof(struct virtio_net_config, mac),
1704                         &config->mac, sizeof(config->mac));
1705
1706                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1707                         vtpci_read_dev_config(hw,
1708                                 offsetof(struct virtio_net_config, status),
1709                                 &config->status, sizeof(config->status));
1710                 } else {
1711                         PMD_INIT_LOG(DEBUG,
1712                                      "VIRTIO_NET_F_STATUS is not supported");
1713                         config->status = 0;
1714                 }
1715
1716                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1717                         vtpci_read_dev_config(hw,
1718                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1719                                 &config->max_virtqueue_pairs,
1720                                 sizeof(config->max_virtqueue_pairs));
1721                 } else {
1722                         PMD_INIT_LOG(DEBUG,
1723                                      "VIRTIO_NET_F_MQ is not supported");
1724                         config->max_virtqueue_pairs = 1;
1725                 }
1726
1727                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1728
1729                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1730                         vtpci_read_dev_config(hw,
1731                                 offsetof(struct virtio_net_config, mtu),
1732                                 &config->mtu,
1733                                 sizeof(config->mtu));
1734
1735                         /*
1736                          * MTU value has already been checked at negotiation
1737                          * time, but check again in case it has changed since
1738                          * then, which should not happen.
1739                          */
1740                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1741                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1742                                                 config->mtu);
1743                                 return -1;
1744                         }
1745
1746                         hw->max_mtu = config->mtu;
1747                         /* Set initial MTU to maximum one supported by vhost */
1748                         eth_dev->data->mtu = config->mtu;
1749
1750                 } else {
1751                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1752                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1753                 }
1754
1755                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1756                                 config->max_virtqueue_pairs);
1757                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1758                 PMD_INIT_LOG(DEBUG,
1759                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1760                                 config->mac[0], config->mac[1],
1761                                 config->mac[2], config->mac[3],
1762                                 config->mac[4], config->mac[5]);
1763         } else {
1764                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1765                 hw->max_queue_pairs = 1;
1766                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1767                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1768         }
1769
1770         ret = virtio_alloc_queues(eth_dev);
1771         if (ret < 0)
1772                 return ret;
1773
1774         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1775                 if (virtio_configure_intr(eth_dev) < 0) {
1776                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1777                         virtio_free_queues(hw);
1778                         return -1;
1779                 }
1780         }
1781
1782         vtpci_reinit_complete(hw);
1783
1784         if (pci_dev)
1785                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1786                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1787                         pci_dev->id.device_id);
1788
1789         return 0;
1790 }
1791
1792 /*
1793  * Remap the PCI device again (IO port map for legacy device and
1794  * memory map for modern device), so that the secondary process
1795  * could have the PCI initiated correctly.
1796  */
1797 static int
1798 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1799 {
1800         if (hw->modern) {
1801                 /*
1802                  * We don't have to re-parse the PCI config space, since
1803                  * rte_pci_map_device() makes sure the mapped address
1804                  * in secondary process would equal to the one mapped in
1805                  * the primary process: error will be returned if that
1806                  * requirement is not met.
1807                  *
1808                  * That said, we could simply reuse all cap pointers
1809                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1810                  * primary process, which is stored in shared memory.
1811                  */
1812                 if (rte_pci_map_device(pci_dev)) {
1813                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1814                         return -1;
1815                 }
1816         } else {
1817                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1818                         return -1;
1819         }
1820
1821         return 0;
1822 }
1823
1824 static void
1825 virtio_set_vtpci_ops(struct virtio_hw *hw)
1826 {
1827 #ifdef RTE_VIRTIO_USER
1828         if (hw->virtio_user_dev)
1829                 VTPCI_OPS(hw) = &virtio_user_ops;
1830         else
1831 #endif
1832         if (hw->modern)
1833                 VTPCI_OPS(hw) = &modern_ops;
1834         else
1835                 VTPCI_OPS(hw) = &legacy_ops;
1836 }
1837
1838 /*
1839  * This function is based on probe() function in virtio_pci.c
1840  * It returns 0 on success.
1841  */
1842 int
1843 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1844 {
1845         struct virtio_hw *hw = eth_dev->data->dev_private;
1846         int ret;
1847
1848         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1849
1850         eth_dev->dev_ops = &virtio_eth_dev_ops;
1851
1852         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1853                 if (!hw->virtio_user_dev) {
1854                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1855                         if (ret)
1856                                 return ret;
1857                 }
1858
1859                 virtio_set_vtpci_ops(hw);
1860                 set_rxtx_funcs(eth_dev);
1861
1862                 return 0;
1863         }
1864
1865         /*
1866          * Pass the information to the rte_eth_dev_close() that it should also
1867          * release the private port resources.
1868          */
1869         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1870
1871         /* Allocate memory for storing MAC addresses */
1872         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1873                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1874         if (eth_dev->data->mac_addrs == NULL) {
1875                 PMD_INIT_LOG(ERR,
1876                         "Failed to allocate %d bytes needed to store MAC addresses",
1877                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1878                 return -ENOMEM;
1879         }
1880
1881         hw->port_id = eth_dev->data->port_id;
1882         /* For virtio_user case the hw->virtio_user_dev is populated by
1883          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1884          */
1885         if (!hw->virtio_user_dev) {
1886                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1887                 if (ret)
1888                         goto err_vtpci_init;
1889         }
1890
1891         /* reset device and negotiate default features */
1892         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1893         if (ret < 0)
1894                 goto err_virtio_init;
1895
1896         hw->opened = true;
1897
1898         return 0;
1899
1900 err_virtio_init:
1901         if (!hw->virtio_user_dev) {
1902                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1903                 if (!hw->modern)
1904                         rte_pci_ioport_unmap(VTPCI_IO(hw));
1905         }
1906 err_vtpci_init:
1907         rte_free(eth_dev->data->mac_addrs);
1908         eth_dev->data->mac_addrs = NULL;
1909         return ret;
1910 }
1911
1912 static int
1913 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1914 {
1915         PMD_INIT_FUNC_TRACE();
1916
1917         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1918                 return 0;
1919
1920         virtio_dev_stop(eth_dev);
1921         virtio_dev_close(eth_dev);
1922
1923         eth_dev->dev_ops = NULL;
1924         eth_dev->tx_pkt_burst = NULL;
1925         eth_dev->rx_pkt_burst = NULL;
1926
1927         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1928
1929         return 0;
1930 }
1931
1932 static int vdpa_check_handler(__rte_unused const char *key,
1933                 const char *value, __rte_unused void *opaque)
1934 {
1935         if (strcmp(value, "1"))
1936                 return -1;
1937
1938         return 0;
1939 }
1940
1941 static int
1942 vdpa_mode_selected(struct rte_devargs *devargs)
1943 {
1944         struct rte_kvargs *kvlist;
1945         const char *key = "vdpa";
1946         int ret = 0;
1947
1948         if (devargs == NULL)
1949                 return 0;
1950
1951         kvlist = rte_kvargs_parse(devargs->args, NULL);
1952         if (kvlist == NULL)
1953                 return 0;
1954
1955         if (!rte_kvargs_count(kvlist, key))
1956                 goto exit;
1957
1958         /* vdpa mode selected when there's a key-value pair: vdpa=1 */
1959         if (rte_kvargs_process(kvlist, key,
1960                                 vdpa_check_handler, NULL) < 0) {
1961                 goto exit;
1962         }
1963         ret = 1;
1964
1965 exit:
1966         rte_kvargs_free(kvlist);
1967         return ret;
1968 }
1969
1970 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1971         struct rte_pci_device *pci_dev)
1972 {
1973         if (rte_eal_iopl_init() != 0) {
1974                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1975                 return 1;
1976         }
1977
1978         /* virtio pmd skips probe if device needs to work in vdpa mode */
1979         if (vdpa_mode_selected(pci_dev->device.devargs))
1980                 return 1;
1981
1982         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1983                 eth_virtio_dev_init);
1984 }
1985
1986 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1987 {
1988         int ret;
1989
1990         ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1991         /* Port has already been released by close. */
1992         if (ret == -ENODEV)
1993                 ret = 0;
1994         return ret;
1995 }
1996
1997 static struct rte_pci_driver rte_virtio_pmd = {
1998         .driver = {
1999                 .name = "net_virtio",
2000         },
2001         .id_table = pci_id_virtio_map,
2002         .drv_flags = 0,
2003         .probe = eth_virtio_pci_probe,
2004         .remove = eth_virtio_pci_remove,
2005 };
2006
2007 RTE_INIT(rte_virtio_pmd_init)
2008 {
2009         rte_eal_iopl_init();
2010         rte_pci_register(&rte_virtio_pmd);
2011 }
2012
2013 static bool
2014 rx_offload_enabled(struct virtio_hw *hw)
2015 {
2016         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2017                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2018                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2019 }
2020
2021 static bool
2022 tx_offload_enabled(struct virtio_hw *hw)
2023 {
2024         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2025                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2026                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2027 }
2028
2029 /*
2030  * Configure virtio device
2031  * It returns 0 on success.
2032  */
2033 static int
2034 virtio_dev_configure(struct rte_eth_dev *dev)
2035 {
2036         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2037         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2038         struct virtio_hw *hw = dev->data->dev_private;
2039         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2040                 hw->vtnet_hdr_size;
2041         uint64_t rx_offloads = rxmode->offloads;
2042         uint64_t tx_offloads = txmode->offloads;
2043         uint64_t req_features;
2044         int ret;
2045
2046         PMD_INIT_LOG(DEBUG, "configure");
2047         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2048
2049         if (dev->data->dev_conf.intr_conf.rxq) {
2050                 ret = virtio_init_device(dev, hw->req_guest_features);
2051                 if (ret < 0)
2052                         return ret;
2053         }
2054
2055         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2056                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2057
2058         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2059                            DEV_RX_OFFLOAD_TCP_CKSUM))
2060                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2061
2062         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2063                 req_features |=
2064                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2065                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2066
2067         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2068                            DEV_TX_OFFLOAD_TCP_CKSUM))
2069                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2070
2071         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2072                 req_features |=
2073                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2074                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2075
2076         /* if request features changed, reinit the device */
2077         if (req_features != hw->req_guest_features) {
2078                 ret = virtio_init_device(dev, req_features);
2079                 if (ret < 0)
2080                         return ret;
2081         }
2082
2083         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2084                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2085                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2086                 PMD_DRV_LOG(ERR,
2087                         "rx checksum not available on this host");
2088                 return -ENOTSUP;
2089         }
2090
2091         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2092                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2093                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2094                 PMD_DRV_LOG(ERR,
2095                         "Large Receive Offload not available on this host");
2096                 return -ENOTSUP;
2097         }
2098
2099         /* start control queue */
2100         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2101                 virtio_dev_cq_start(dev);
2102
2103         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2104                 hw->vlan_strip = 1;
2105
2106         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2107             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2108                 PMD_DRV_LOG(ERR,
2109                             "vlan filtering not available on this host");
2110                 return -ENOTSUP;
2111         }
2112
2113         hw->has_tx_offload = tx_offload_enabled(hw);
2114         hw->has_rx_offload = rx_offload_enabled(hw);
2115
2116         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2117                 /* Enable vector (0) for Link State Intrerrupt */
2118                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2119                                 VIRTIO_MSI_NO_VECTOR) {
2120                         PMD_DRV_LOG(ERR, "failed to set config vector");
2121                         return -EBUSY;
2122                 }
2123
2124         rte_spinlock_init(&hw->state_lock);
2125
2126         hw->use_simple_rx = 1;
2127
2128         if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2129                 hw->use_inorder_tx = 1;
2130                 hw->use_inorder_rx = 1;
2131                 hw->use_simple_rx = 0;
2132         }
2133
2134         if (vtpci_packed_queue(hw)) {
2135                 hw->use_simple_rx = 0;
2136                 hw->use_inorder_rx = 0;
2137         }
2138
2139 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
2140         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2141                 hw->use_simple_rx = 0;
2142         }
2143 #endif
2144         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2145                  hw->use_simple_rx = 0;
2146         }
2147
2148         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2149                            DEV_RX_OFFLOAD_TCP_CKSUM |
2150                            DEV_RX_OFFLOAD_TCP_LRO |
2151                            DEV_RX_OFFLOAD_VLAN_STRIP))
2152                 hw->use_simple_rx = 0;
2153
2154         return 0;
2155 }
2156
2157
2158 static int
2159 virtio_dev_start(struct rte_eth_dev *dev)
2160 {
2161         uint16_t nb_queues, i;
2162         struct virtnet_rx *rxvq;
2163         struct virtnet_tx *txvq __rte_unused;
2164         struct virtio_hw *hw = dev->data->dev_private;
2165         int ret;
2166
2167         /* Finish the initialization of the queues */
2168         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2169                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2170                 if (ret < 0)
2171                         return ret;
2172         }
2173         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2174                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2175                 if (ret < 0)
2176                         return ret;
2177         }
2178
2179         /* check if lsc interrupt feature is enabled */
2180         if (dev->data->dev_conf.intr_conf.lsc) {
2181                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2182                         PMD_DRV_LOG(ERR, "link status not supported by host");
2183                         return -ENOTSUP;
2184                 }
2185         }
2186
2187         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2188          * in device configure, but it could be unmapped  when device is
2189          * stopped.
2190          */
2191         if (dev->data->dev_conf.intr_conf.lsc ||
2192             dev->data->dev_conf.intr_conf.rxq) {
2193                 virtio_intr_disable(dev);
2194
2195                 /* Setup interrupt callback  */
2196                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2197                         rte_intr_callback_register(dev->intr_handle,
2198                                                    virtio_interrupt_handler,
2199                                                    dev);
2200
2201                 if (virtio_intr_enable(dev) < 0) {
2202                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2203                         return -EIO;
2204                 }
2205         }
2206
2207         /*Notify the backend
2208          *Otherwise the tap backend might already stop its queue due to fullness.
2209          *vhost backend will have no chance to be waked up
2210          */
2211         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2212         if (hw->max_queue_pairs > 1) {
2213                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2214                         return -EINVAL;
2215         }
2216
2217         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2218
2219         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2220                 rxvq = dev->data->rx_queues[i];
2221                 /* Flush the old packets */
2222                 virtqueue_rxvq_flush(rxvq->vq);
2223                 virtqueue_notify(rxvq->vq);
2224         }
2225
2226         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2227                 txvq = dev->data->tx_queues[i];
2228                 virtqueue_notify(txvq->vq);
2229         }
2230
2231         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2232
2233         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2234                 rxvq = dev->data->rx_queues[i];
2235                 VIRTQUEUE_DUMP(rxvq->vq);
2236         }
2237
2238         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2239                 txvq = dev->data->tx_queues[i];
2240                 VIRTQUEUE_DUMP(txvq->vq);
2241         }
2242
2243         set_rxtx_funcs(dev);
2244         hw->started = true;
2245
2246         /* Initialize Link state */
2247         virtio_dev_link_update(dev, 0);
2248
2249         return 0;
2250 }
2251
2252 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2253 {
2254         struct virtio_hw *hw = dev->data->dev_private;
2255         uint16_t nr_vq = virtio_get_nr_vq(hw);
2256         const char *type __rte_unused;
2257         unsigned int i, mbuf_num = 0;
2258         struct virtqueue *vq;
2259         struct rte_mbuf *buf;
2260         int queue_type;
2261
2262         if (hw->vqs == NULL)
2263                 return;
2264
2265         for (i = 0; i < nr_vq; i++) {
2266                 vq = hw->vqs[i];
2267                 if (!vq)
2268                         continue;
2269
2270                 queue_type = virtio_get_queue_type(hw, i);
2271                 if (queue_type == VTNET_RQ)
2272                         type = "rxq";
2273                 else if (queue_type == VTNET_TQ)
2274                         type = "txq";
2275                 else
2276                         continue;
2277
2278                 PMD_INIT_LOG(DEBUG,
2279                         "Before freeing %s[%d] used and unused buf",
2280                         type, i);
2281                 VIRTQUEUE_DUMP(vq);
2282
2283                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2284                         rte_pktmbuf_free(buf);
2285                         mbuf_num++;
2286                 }
2287
2288                 PMD_INIT_LOG(DEBUG,
2289                         "After freeing %s[%d] used and unused buf",
2290                         type, i);
2291                 VIRTQUEUE_DUMP(vq);
2292         }
2293
2294         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2295 }
2296
2297 /*
2298  * Stop device: disable interrupt and mark link down
2299  */
2300 static void
2301 virtio_dev_stop(struct rte_eth_dev *dev)
2302 {
2303         struct virtio_hw *hw = dev->data->dev_private;
2304         struct rte_eth_link link;
2305         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2306
2307         PMD_INIT_LOG(DEBUG, "stop");
2308
2309         rte_spinlock_lock(&hw->state_lock);
2310         if (!hw->started)
2311                 goto out_unlock;
2312         hw->started = false;
2313
2314         if (intr_conf->lsc || intr_conf->rxq) {
2315                 virtio_intr_disable(dev);
2316
2317                 /* Reset interrupt callback  */
2318                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2319                         rte_intr_callback_unregister(dev->intr_handle,
2320                                                      virtio_interrupt_handler,
2321                                                      dev);
2322                 }
2323         }
2324
2325         memset(&link, 0, sizeof(link));
2326         rte_eth_linkstatus_set(dev, &link);
2327 out_unlock:
2328         rte_spinlock_unlock(&hw->state_lock);
2329 }
2330
2331 static int
2332 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2333 {
2334         struct rte_eth_link link;
2335         uint16_t status;
2336         struct virtio_hw *hw = dev->data->dev_private;
2337
2338         memset(&link, 0, sizeof(link));
2339         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2340         link.link_speed  = ETH_SPEED_NUM_10G;
2341         link.link_autoneg = ETH_LINK_FIXED;
2342
2343         if (!hw->started) {
2344                 link.link_status = ETH_LINK_DOWN;
2345         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2346                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2347                 vtpci_read_dev_config(hw,
2348                                 offsetof(struct virtio_net_config, status),
2349                                 &status, sizeof(status));
2350                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2351                         link.link_status = ETH_LINK_DOWN;
2352                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2353                                      dev->data->port_id);
2354                 } else {
2355                         link.link_status = ETH_LINK_UP;
2356                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2357                                      dev->data->port_id);
2358                 }
2359         } else {
2360                 link.link_status = ETH_LINK_UP;
2361         }
2362
2363         return rte_eth_linkstatus_set(dev, &link);
2364 }
2365
2366 static int
2367 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2368 {
2369         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2370         struct virtio_hw *hw = dev->data->dev_private;
2371         uint64_t offloads = rxmode->offloads;
2372
2373         if (mask & ETH_VLAN_FILTER_MASK) {
2374                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2375                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2376
2377                         PMD_DRV_LOG(NOTICE,
2378                                 "vlan filtering not available on this host");
2379
2380                         return -ENOTSUP;
2381                 }
2382         }
2383
2384         if (mask & ETH_VLAN_STRIP_MASK)
2385                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2386
2387         return 0;
2388 }
2389
2390 static void
2391 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2392 {
2393         uint64_t tso_mask, host_features;
2394         struct virtio_hw *hw = dev->data->dev_private;
2395
2396         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2397
2398         dev_info->max_rx_queues =
2399                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2400         dev_info->max_tx_queues =
2401                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2402         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2403         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2404         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2405
2406         host_features = VTPCI_OPS(hw)->get_features(hw);
2407         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2408         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2409         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2410                 dev_info->rx_offload_capa |=
2411                         DEV_RX_OFFLOAD_TCP_CKSUM |
2412                         DEV_RX_OFFLOAD_UDP_CKSUM;
2413         }
2414         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2415                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2416         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2417                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2418         if ((host_features & tso_mask) == tso_mask)
2419                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2420
2421         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2422                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2423         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2424                 dev_info->tx_offload_capa |=
2425                         DEV_TX_OFFLOAD_UDP_CKSUM |
2426                         DEV_TX_OFFLOAD_TCP_CKSUM;
2427         }
2428         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2429                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2430         if ((host_features & tso_mask) == tso_mask)
2431                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2432 }
2433
2434 /*
2435  * It enables testpmd to collect per queue stats.
2436  */
2437 static int
2438 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2439 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2440 __rte_unused uint8_t is_rx)
2441 {
2442         return 0;
2443 }
2444
2445 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2446 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2447 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2448
2449 RTE_INIT(virtio_init_log)
2450 {
2451         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2452         if (virtio_logtype_init >= 0)
2453                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2454         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2455         if (virtio_logtype_driver >= 0)
2456                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2457 }