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
  39 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  40 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  41 static int  virtio_dev_start(struct rte_eth_dev *dev);
  42 static void virtio_dev_stop(struct rte_eth_dev *dev);
  43 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  44 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  45 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  46 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  47 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  48                                 struct rte_eth_dev_info *dev_info);
  49 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  50         int wait_to_complete);
  51 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  52
  53 static void virtio_set_hwaddr(struct virtio_hw *hw);
  54 static void virtio_get_hwaddr(struct virtio_hw *hw);
  55
  56 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  57                                  struct rte_eth_stats *stats);
  58 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  59                                  struct rte_eth_xstat *xstats, unsigned n);
  60 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  61                                        struct rte_eth_xstat_name *xstats_names,
  62                                        unsigned limit);
  63 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  64 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  65 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  66                                 uint16_t vlan_id, int on);
  67 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  68                                 struct rte_ether_addr *mac_addr,
  69                                 uint32_t index, uint32_t vmdq);
  70 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  71 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
  72                                 struct rte_ether_addr *mac_addr);
  73
  74 static int virtio_intr_disable(struct rte_eth_dev *dev);
  75
  76 static int virtio_dev_queue_stats_mapping_set(
  77         struct rte_eth_dev *eth_dev,
  78         uint16_t queue_id,
  79         uint8_t stat_idx,
  80         uint8_t is_rx);
  81
  82 int virtio_logtype_init;
  83 int virtio_logtype_driver;
  84
  85 static void virtio_notify_peers(struct rte_eth_dev *dev);
  86 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  87
  88 /*
  89  * The set of PCI devices this driver supports
  90  */
  91 static const struct rte_pci_id pci_id_virtio_map[] = {
  92         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  93         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  94         { .vendor_id = 0, /* sentinel */ },
  95 };
  96
  97 struct rte_virtio_xstats_name_off {
  98         char name[RTE_ETH_XSTATS_NAME_SIZE];
  99         unsigned offset;
 100 };
 101
 102 /* [rt]x_qX_ is prepended to the name string here */
 103 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 104         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 105         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 106         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 107         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 108         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 109         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 110         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 111         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 112         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 113         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 114         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 115         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 116         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 117 };
 118
 119 /* [rt]x_qX_ is prepended to the name string here */
 120 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 121         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 122         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 123         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 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
 738 static void
 739 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 740 {
 741         struct virtio_hw *hw = dev->data->dev_private;
 742         struct virtio_pmd_ctrl ctrl;
 743         int dlen[1];
 744         int ret;
 745
 746         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 747                 PMD_INIT_LOG(INFO, "host does not support rx control");
 748                 return;
 749         }
 750
 751         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 752         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 753         ctrl.data[0] = 1;
 754         dlen[0] = 1;
 755
 756         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 757         if (ret)
 758                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 759 }
 760
 761 static void
 762 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 763 {
 764         struct virtio_hw *hw = dev->data->dev_private;
 765         struct virtio_pmd_ctrl ctrl;
 766         int dlen[1];
 767         int ret;
 768
 769         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 770                 PMD_INIT_LOG(INFO, "host does not support rx control");
 771                 return;
 772         }
 773
 774         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 775         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 776         ctrl.data[0] = 0;
 777         dlen[0] = 1;
 778
 779         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 780         if (ret)
 781                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 782 }
 783
 784 static void
 785 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 786 {
 787         struct virtio_hw *hw = dev->data->dev_private;
 788         struct virtio_pmd_ctrl ctrl;
 789         int dlen[1];
 790         int ret;
 791
 792         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 793                 PMD_INIT_LOG(INFO, "host does not support rx control");
 794                 return;
 795         }
 796
 797         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 798         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 799         ctrl.data[0] = 1;
 800         dlen[0] = 1;
 801
 802         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 803         if (ret)
 804                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 805 }
 806
 807 static void
 808 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 809 {
 810         struct virtio_hw *hw = dev->data->dev_private;
 811         struct virtio_pmd_ctrl ctrl;
 812         int dlen[1];
 813         int ret;
 814
 815         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 816                 PMD_INIT_LOG(INFO, "host does not support rx control");
 817                 return;
 818         }
 819
 820         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 821         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 822         ctrl.data[0] = 0;
 823         dlen[0] = 1;
 824
 825         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 826         if (ret)
 827                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 828 }
 829
 830 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 831 static int
 832 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 833 {
 834         struct virtio_hw *hw = dev->data->dev_private;
 835         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 836                                  hw->vtnet_hdr_size;
 837         uint32_t frame_size = mtu + ether_hdr_len;
 838         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 839
 840         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 841
 842         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 843                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 844                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 845                 return -EINVAL;
 846         }
 847         return 0;
 848 }
 849
 850 static int
 851 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 852 {
 853         struct virtio_hw *hw = dev->data->dev_private;
 854         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 855         struct virtqueue *vq = rxvq->vq;
 856
 857         virtqueue_enable_intr(vq);
 858         virtio_mb(hw->weak_barriers);
 859         return 0;
 860 }
 861
 862 static int
 863 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 864 {
 865         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 866         struct virtqueue *vq = rxvq->vq;
 867
 868         virtqueue_disable_intr(vq);
 869         return 0;
 870 }
 871
 872 /*
 873  * dev_ops for virtio, bare necessities for basic operation
 874  */
 875 static const struct eth_dev_ops virtio_eth_dev_ops = {
 876         .dev_configure           = virtio_dev_configure,
 877         .dev_start               = virtio_dev_start,
 878         .dev_stop                = virtio_dev_stop,
 879         .dev_close               = virtio_dev_close,
 880         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 881         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 882         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 883         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 884         .mtu_set                 = virtio_mtu_set,
 885         .dev_infos_get           = virtio_dev_info_get,
 886         .stats_get               = virtio_dev_stats_get,
 887         .xstats_get              = virtio_dev_xstats_get,
 888         .xstats_get_names        = virtio_dev_xstats_get_names,
 889         .stats_reset             = virtio_dev_stats_reset,
 890         .xstats_reset            = virtio_dev_stats_reset,
 891         .link_update             = virtio_dev_link_update,
 892         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 893         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 894         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 895         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 896         .rx_queue_release        = virtio_dev_queue_release,
 897         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 898         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 899         .tx_queue_release        = virtio_dev_queue_release,
 900         /* collect stats per queue */
 901         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 902         .vlan_filter_set         = virtio_vlan_filter_set,
 903         .mac_addr_add            = virtio_mac_addr_add,
 904         .mac_addr_remove         = virtio_mac_addr_remove,
 905         .mac_addr_set            = virtio_mac_addr_set,
 906 };
 907
 908 /*
 909  * dev_ops for virtio-user in secondary processes, as we just have
 910  * some limited supports currently.
 911  */
 912 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 913         .dev_infos_get           = virtio_dev_info_get,
 914         .stats_get               = virtio_dev_stats_get,
 915         .xstats_get              = virtio_dev_xstats_get,
 916         .xstats_get_names        = virtio_dev_xstats_get_names,
 917         .stats_reset             = virtio_dev_stats_reset,
 918         .xstats_reset            = virtio_dev_stats_reset,
 919         /* collect stats per queue */
 920         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 921 };
 922
 923 static void
 924 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 925 {
 926         unsigned i;
 927
 928         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 929                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 930                 if (txvq == NULL)
 931                         continue;
 932
 933                 stats->opackets += txvq->stats.packets;
 934                 stats->obytes += txvq->stats.bytes;
 935                 stats->oerrors += txvq->stats.errors;
 936
 937                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 938                         stats->q_opackets[i] = txvq->stats.packets;
 939                         stats->q_obytes[i] = txvq->stats.bytes;
 940                 }
 941         }
 942
 943         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 944                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 945                 if (rxvq == NULL)
 946                         continue;
 947
 948                 stats->ipackets += rxvq->stats.packets;
 949                 stats->ibytes += rxvq->stats.bytes;
 950                 stats->ierrors += rxvq->stats.errors;
 951
 952                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 953                         stats->q_ipackets[i] = rxvq->stats.packets;
 954                         stats->q_ibytes[i] = rxvq->stats.bytes;
 955                 }
 956         }
 957
 958         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 959 }
 960
 961 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 962                                        struct rte_eth_xstat_name *xstats_names,
 963                                        __rte_unused unsigned limit)
 964 {
 965         unsigned i;
 966         unsigned count = 0;
 967         unsigned t;
 968
 969         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 970                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 971
 972         if (xstats_names != NULL) {
 973                 /* Note: limit checked in rte_eth_xstats_names() */
 974
 975                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 976                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 977                         if (rxvq == NULL)
 978                                 continue;
 979                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 980                                 snprintf(xstats_names[count].name,
 981                                         sizeof(xstats_names[count].name),
 982                                         "rx_q%u_%s", i,
 983                                         rte_virtio_rxq_stat_strings[t].name);
 984                                 count++;
 985                         }
 986                 }
 987
 988                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 989                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
 990                         if (txvq == NULL)
 991                                 continue;
 992                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 993                                 snprintf(xstats_names[count].name,
 994                                         sizeof(xstats_names[count].name),
 995                                         "tx_q%u_%s", i,
 996                                         rte_virtio_txq_stat_strings[t].name);
 997                                 count++;
 998                         }
 999                 }
1000                 return count;
1001         }
1002         return nstats;
1003 }
1004
1005 static int
1006 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1007                       unsigned n)
1008 {
1009         unsigned i;
1010         unsigned count = 0;
1011
1012         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1013                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1014
1015         if (n < nstats)
1016                 return nstats;
1017
1018         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1019                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1020
1021                 if (rxvq == NULL)
1022                         continue;
1023
1024                 unsigned t;
1025
1026                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1027                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1028                                 rte_virtio_rxq_stat_strings[t].offset);
1029                         xstats[count].id = count;
1030                         count++;
1031                 }
1032         }
1033
1034         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1035                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1036
1037                 if (txvq == NULL)
1038                         continue;
1039
1040                 unsigned t;
1041
1042                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1043                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1044                                 rte_virtio_txq_stat_strings[t].offset);
1045                         xstats[count].id = count;
1046                         count++;
1047                 }
1048         }
1049
1050         return count;
1051 }
1052
1053 static int
1054 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1055 {
1056         virtio_update_stats(dev, stats);
1057
1058         return 0;
1059 }
1060
1061 static void
1062 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1063 {
1064         unsigned int i;
1065
1066         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1067                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1068                 if (txvq == NULL)
1069                         continue;
1070
1071                 txvq->stats.packets = 0;
1072                 txvq->stats.bytes = 0;
1073                 txvq->stats.errors = 0;
1074                 txvq->stats.multicast = 0;
1075                 txvq->stats.broadcast = 0;
1076                 memset(txvq->stats.size_bins, 0,
1077                        sizeof(txvq->stats.size_bins[0]) * 8);
1078         }
1079
1080         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1081                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1082                 if (rxvq == NULL)
1083                         continue;
1084
1085                 rxvq->stats.packets = 0;
1086                 rxvq->stats.bytes = 0;
1087                 rxvq->stats.errors = 0;
1088                 rxvq->stats.multicast = 0;
1089                 rxvq->stats.broadcast = 0;
1090                 memset(rxvq->stats.size_bins, 0,
1091                        sizeof(rxvq->stats.size_bins[0]) * 8);
1092         }
1093 }
1094
1095 static void
1096 virtio_set_hwaddr(struct virtio_hw *hw)
1097 {
1098         vtpci_write_dev_config(hw,
1099                         offsetof(struct virtio_net_config, mac),
1100                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1101 }
1102
1103 static void
1104 virtio_get_hwaddr(struct virtio_hw *hw)
1105 {
1106         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1107                 vtpci_read_dev_config(hw,
1108                         offsetof(struct virtio_net_config, mac),
1109                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1110         } else {
1111                 rte_eth_random_addr(&hw->mac_addr[0]);
1112                 virtio_set_hwaddr(hw);
1113         }
1114 }
1115
1116 static int
1117 virtio_mac_table_set(struct virtio_hw *hw,
1118                      const struct virtio_net_ctrl_mac *uc,
1119                      const struct virtio_net_ctrl_mac *mc)
1120 {
1121         struct virtio_pmd_ctrl ctrl;
1122         int err, len[2];
1123
1124         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1125                 PMD_DRV_LOG(INFO, "host does not support mac table");
1126                 return -1;
1127         }
1128
1129         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1130         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1131
1132         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1133         memcpy(ctrl.data, uc, len[0]);
1134
1135         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1136         memcpy(ctrl.data + len[0], mc, len[1]);
1137
1138         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1139         if (err != 0)
1140                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1141         return err;
1142 }
1143
1144 static int
1145 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1146                     uint32_t index, uint32_t vmdq __rte_unused)
1147 {
1148         struct virtio_hw *hw = dev->data->dev_private;
1149         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1150         unsigned int i;
1151         struct virtio_net_ctrl_mac *uc, *mc;
1152
1153         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1154                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1155                 return -EINVAL;
1156         }
1157
1158         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1159                 sizeof(uc->entries));
1160         uc->entries = 0;
1161         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1162                 sizeof(mc->entries));
1163         mc->entries = 0;
1164
1165         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1166                 const struct rte_ether_addr *addr
1167                         = (i == index) ? mac_addr : addrs + i;
1168                 struct virtio_net_ctrl_mac *tbl
1169                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1170
1171                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1172         }
1173
1174         return virtio_mac_table_set(hw, uc, mc);
1175 }
1176
1177 static void
1178 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1179 {
1180         struct virtio_hw *hw = dev->data->dev_private;
1181         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1182         struct virtio_net_ctrl_mac *uc, *mc;
1183         unsigned int i;
1184
1185         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1186                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1187                 return;
1188         }
1189
1190         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1191                 sizeof(uc->entries));
1192         uc->entries = 0;
1193         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1194                 sizeof(mc->entries));
1195         mc->entries = 0;
1196
1197         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1198                 struct virtio_net_ctrl_mac *tbl;
1199
1200                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1201                         continue;
1202
1203                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1204                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1205                         RTE_ETHER_ADDR_LEN);
1206         }
1207
1208         virtio_mac_table_set(hw, uc, mc);
1209 }
1210
1211 static int
1212 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1213 {
1214         struct virtio_hw *hw = dev->data->dev_private;
1215
1216         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1217
1218         /* Use atomic update if available */
1219         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1220                 struct virtio_pmd_ctrl ctrl;
1221                 int len = RTE_ETHER_ADDR_LEN;
1222
1223                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1224                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1225
1226                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1227                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1228         }
1229
1230         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1231                 return -ENOTSUP;
1232
1233         virtio_set_hwaddr(hw);
1234         return 0;
1235 }
1236
1237 static int
1238 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1239 {
1240         struct virtio_hw *hw = dev->data->dev_private;
1241         struct virtio_pmd_ctrl ctrl;
1242         int len;
1243
1244         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1245                 return -ENOTSUP;
1246
1247         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1248         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1249         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1250         len = sizeof(vlan_id);
1251
1252         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1253 }
1254
1255 static int
1256 virtio_intr_enable(struct rte_eth_dev *dev)
1257 {
1258         struct virtio_hw *hw = dev->data->dev_private;
1259
1260         if (rte_intr_enable(dev->intr_handle) < 0)
1261                 return -1;
1262
1263         if (!hw->virtio_user_dev)
1264                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1265
1266         return 0;
1267 }
1268
1269 static int
1270 virtio_intr_disable(struct rte_eth_dev *dev)
1271 {
1272         struct virtio_hw *hw = dev->data->dev_private;
1273
1274         if (rte_intr_disable(dev->intr_handle) < 0)
1275                 return -1;
1276
1277         if (!hw->virtio_user_dev)
1278                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1279
1280         return 0;
1281 }
1282
1283 static int
1284 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1285 {
1286         uint64_t host_features;
1287
1288         /* Prepare guest_features: feature that driver wants to support */
1289         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1290                 req_features);
1291
1292         /* Read device(host) feature bits */
1293         host_features = VTPCI_OPS(hw)->get_features(hw);
1294         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1295                 host_features);
1296
1297         /* If supported, ensure MTU value is valid before acknowledging it. */
1298         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1299                 struct virtio_net_config config;
1300
1301                 vtpci_read_dev_config(hw,
1302                         offsetof(struct virtio_net_config, mtu),
1303                         &config.mtu, sizeof(config.mtu));
1304
1305                 if (config.mtu < RTE_ETHER_MIN_MTU)
1306                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1307         }
1308
1309         /*
1310          * Negotiate features: Subset of device feature bits are written back
1311          * guest feature bits.
1312          */
1313         hw->guest_features = req_features;
1314         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1315         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1316                 hw->guest_features);
1317
1318         if (hw->modern) {
1319                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1320                         PMD_INIT_LOG(ERR,
1321                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1322                         return -1;
1323                 }
1324                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1325                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1326                         PMD_INIT_LOG(ERR,
1327                                 "failed to set FEATURES_OK status!");
1328                         return -1;
1329                 }
1330         }
1331
1332         hw->req_guest_features = req_features;
1333
1334         return 0;
1335 }
1336
1337 int
1338 virtio_dev_pause(struct rte_eth_dev *dev)
1339 {
1340         struct virtio_hw *hw = dev->data->dev_private;
1341
1342         rte_spinlock_lock(&hw->state_lock);
1343
1344         if (hw->started == 0) {
1345                 /* Device is just stopped. */
1346                 rte_spinlock_unlock(&hw->state_lock);
1347                 return -1;
1348         }
1349         hw->started = 0;
1350         /*
1351          * Prevent the worker threads from touching queues to avoid contention,
1352          * 1 ms should be enough for the ongoing Tx function to finish.
1353          */
1354         rte_delay_ms(1);
1355         return 0;
1356 }
1357
1358 /*
1359  * Recover hw state to let the worker threads continue.
1360  */
1361 void
1362 virtio_dev_resume(struct rte_eth_dev *dev)
1363 {
1364         struct virtio_hw *hw = dev->data->dev_private;
1365
1366         hw->started = 1;
1367         rte_spinlock_unlock(&hw->state_lock);
1368 }
1369
1370 /*
1371  * Should be called only after device is paused.
1372  */
1373 int
1374 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1375                 int nb_pkts)
1376 {
1377         struct virtio_hw *hw = dev->data->dev_private;
1378         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1379         int ret;
1380
1381         hw->inject_pkts = tx_pkts;
1382         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1383         hw->inject_pkts = NULL;
1384
1385         return ret;
1386 }
1387
1388 static void
1389 virtio_notify_peers(struct rte_eth_dev *dev)
1390 {
1391         struct virtio_hw *hw = dev->data->dev_private;
1392         struct virtnet_rx *rxvq;
1393         struct rte_mbuf *rarp_mbuf;
1394
1395         if (!dev->data->rx_queues)
1396                 return;
1397
1398         rxvq = dev->data->rx_queues[0];
1399         if (!rxvq)
1400                 return;
1401
1402         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1403                         (struct rte_ether_addr *)hw->mac_addr);
1404         if (rarp_mbuf == NULL) {
1405                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1406                 return;
1407         }
1408
1409         /* If virtio port just stopped, no need to send RARP */
1410         if (virtio_dev_pause(dev) < 0) {
1411                 rte_pktmbuf_free(rarp_mbuf);
1412                 return;
1413         }
1414
1415         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1416         virtio_dev_resume(dev);
1417 }
1418
1419 static void
1420 virtio_ack_link_announce(struct rte_eth_dev *dev)
1421 {
1422         struct virtio_hw *hw = dev->data->dev_private;
1423         struct virtio_pmd_ctrl ctrl;
1424
1425         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1426         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1427
1428         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1429 }
1430
1431 /*
1432  * Process virtio config changed interrupt. Call the callback
1433  * if link state changed, generate gratuitous RARP packet if
1434  * the status indicates an ANNOUNCE.
1435  */
1436 void
1437 virtio_interrupt_handler(void *param)
1438 {
1439         struct rte_eth_dev *dev = param;
1440         struct virtio_hw *hw = dev->data->dev_private;
1441         uint8_t isr;
1442         uint16_t status;
1443
1444         /* Read interrupt status which clears interrupt */
1445         isr = vtpci_isr(hw);
1446         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1447
1448         if (virtio_intr_enable(dev) < 0)
1449                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1450
1451         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1452                 if (virtio_dev_link_update(dev, 0) == 0)
1453                         _rte_eth_dev_callback_process(dev,
1454                                                       RTE_ETH_EVENT_INTR_LSC,
1455                                                       NULL);
1456
1457                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1458                         vtpci_read_dev_config(hw,
1459                                 offsetof(struct virtio_net_config, status),
1460                                 &status, sizeof(status));
1461                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1462                                 virtio_notify_peers(dev);
1463                                 if (hw->cvq)
1464                                         virtio_ack_link_announce(dev);
1465                         }
1466                 }
1467         }
1468 }
1469
1470 /* set rx and tx handlers according to what is supported */
1471 static void
1472 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1473 {
1474         struct virtio_hw *hw = eth_dev->data->dev_private;
1475
1476         if (vtpci_packed_queue(hw)) {
1477                 PMD_INIT_LOG(INFO,
1478                         "virtio: using packed ring %s Tx path on port %u",
1479                         hw->use_inorder_tx ? "inorder" : "standard",
1480                         eth_dev->data->port_id);
1481                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1482         } else {
1483                 if (hw->use_inorder_tx) {
1484                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1485                                 eth_dev->data->port_id);
1486                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1487                 } else {
1488                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1489                                 eth_dev->data->port_id);
1490                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1491                 }
1492         }
1493
1494         if (vtpci_packed_queue(hw)) {
1495                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1496                         PMD_INIT_LOG(INFO,
1497                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1498                                 eth_dev->data->port_id);
1499                         eth_dev->rx_pkt_burst =
1500                                 &virtio_recv_mergeable_pkts_packed;
1501                 } else {
1502                         PMD_INIT_LOG(INFO,
1503                                 "virtio: using packed ring standard Rx path on port %u",
1504                                 eth_dev->data->port_id);
1505                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1506                 }
1507         } else {
1508                 if (hw->use_simple_rx) {
1509                         PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1510                                 eth_dev->data->port_id);
1511                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1512                 } else if (hw->use_inorder_rx) {
1513                         PMD_INIT_LOG(INFO,
1514                                 "virtio: using inorder Rx path on port %u",
1515                                 eth_dev->data->port_id);
1516                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1517                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1518                         PMD_INIT_LOG(INFO,
1519                                 "virtio: using mergeable buffer Rx path on port %u",
1520                                 eth_dev->data->port_id);
1521                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1522                 } else {
1523                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1524                                 eth_dev->data->port_id);
1525                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1526                 }
1527         }
1528
1529 }
1530
1531 /* Only support 1:1 queue/interrupt mapping so far.
1532  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1533  * interrupt vectors (<N+1).
1534  */
1535 static int
1536 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1537 {
1538         uint32_t i;
1539         struct virtio_hw *hw = dev->data->dev_private;
1540
1541         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1542         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1543                 dev->intr_handle->intr_vec[i] = i + 1;
1544                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1545                                                  VIRTIO_MSI_NO_VECTOR) {
1546                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1547                         return -EBUSY;
1548                 }
1549         }
1550
1551         return 0;
1552 }
1553
1554 static void
1555 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1556 {
1557         uint32_t i;
1558         struct virtio_hw *hw = dev->data->dev_private;
1559
1560         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1561         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1562                 VTPCI_OPS(hw)->set_queue_irq(hw,
1563                                              hw->vqs[i * VTNET_CQ],
1564                                              VIRTIO_MSI_NO_VECTOR);
1565 }
1566
1567 static int
1568 virtio_configure_intr(struct rte_eth_dev *dev)
1569 {
1570         struct virtio_hw *hw = dev->data->dev_private;
1571
1572         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1573                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1574                 return -ENOTSUP;
1575         }
1576
1577         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1578                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1579                 return -1;
1580         }
1581
1582         if (!dev->intr_handle->intr_vec) {
1583                 dev->intr_handle->intr_vec =
1584                         rte_zmalloc("intr_vec",
1585                                     hw->max_queue_pairs * sizeof(int), 0);
1586                 if (!dev->intr_handle->intr_vec) {
1587                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1588                                      hw->max_queue_pairs);
1589                         return -ENOMEM;
1590                 }
1591         }
1592
1593         /* Re-register callback to update max_intr */
1594         rte_intr_callback_unregister(dev->intr_handle,
1595                                      virtio_interrupt_handler,
1596                                      dev);
1597         rte_intr_callback_register(dev->intr_handle,
1598                                    virtio_interrupt_handler,
1599                                    dev);
1600
1601         /* DO NOT try to remove this! This function will enable msix, or QEMU
1602          * will encounter SIGSEGV when DRIVER_OK is sent.
1603          * And for legacy devices, this should be done before queue/vec binding
1604          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1605          * (22) will be ignored.
1606          */
1607         if (virtio_intr_enable(dev) < 0) {
1608                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1609                 return -1;
1610         }
1611
1612         if (virtio_queues_bind_intr(dev) < 0) {
1613                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1614                 return -1;
1615         }
1616
1617         return 0;
1618 }
1619
1620 /* reset device and renegotiate features if needed */
1621 static int
1622 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1623 {
1624         struct virtio_hw *hw = eth_dev->data->dev_private;
1625         struct virtio_net_config *config;
1626         struct virtio_net_config local_config;
1627         struct rte_pci_device *pci_dev = NULL;
1628         int ret;
1629
1630         /* Reset the device although not necessary at startup */
1631         vtpci_reset(hw);
1632
1633         if (hw->vqs) {
1634                 virtio_dev_free_mbufs(eth_dev);
1635                 virtio_free_queues(hw);
1636         }
1637
1638         /* Tell the host we've noticed this device. */
1639         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1640
1641         /* Tell the host we've known how to drive the device. */
1642         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1643         if (virtio_negotiate_features(hw, req_features) < 0)
1644                 return -1;
1645
1646         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1647
1648         if (!hw->virtio_user_dev) {
1649                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1650                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1651         }
1652
1653         /* If host does not support both status and MSI-X then disable LSC */
1654         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1655             hw->use_msix != VIRTIO_MSIX_NONE)
1656                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1657         else
1658                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1659
1660         /* Setting up rx_header size for the device */
1661         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1662             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1663             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1664                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1665         else
1666                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1667
1668         /* Copy the permanent MAC address to: virtio_hw */
1669         virtio_get_hwaddr(hw);
1670         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1671                         &eth_dev->data->mac_addrs[0]);
1672         PMD_INIT_LOG(DEBUG,
1673                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1674                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1675                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1676
1677         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1678                 config = &local_config;
1679
1680                 vtpci_read_dev_config(hw,
1681                         offsetof(struct virtio_net_config, mac),
1682                         &config->mac, sizeof(config->mac));
1683
1684                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1685                         vtpci_read_dev_config(hw,
1686                                 offsetof(struct virtio_net_config, status),
1687                                 &config->status, sizeof(config->status));
1688                 } else {
1689                         PMD_INIT_LOG(DEBUG,
1690                                      "VIRTIO_NET_F_STATUS is not supported");
1691                         config->status = 0;
1692                 }
1693
1694                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1695                         vtpci_read_dev_config(hw,
1696                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1697                                 &config->max_virtqueue_pairs,
1698                                 sizeof(config->max_virtqueue_pairs));
1699                 } else {
1700                         PMD_INIT_LOG(DEBUG,
1701                                      "VIRTIO_NET_F_MQ is not supported");
1702                         config->max_virtqueue_pairs = 1;
1703                 }
1704
1705                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1706
1707                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1708                         vtpci_read_dev_config(hw,
1709                                 offsetof(struct virtio_net_config, mtu),
1710                                 &config->mtu,
1711                                 sizeof(config->mtu));
1712
1713                         /*
1714                          * MTU value has already been checked at negotiation
1715                          * time, but check again in case it has changed since
1716                          * then, which should not happen.
1717                          */
1718                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1719                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1720                                                 config->mtu);
1721                                 return -1;
1722                         }
1723
1724                         hw->max_mtu = config->mtu;
1725                         /* Set initial MTU to maximum one supported by vhost */
1726                         eth_dev->data->mtu = config->mtu;
1727
1728                 } else {
1729                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1730                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1731                 }
1732
1733                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1734                                 config->max_virtqueue_pairs);
1735                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1736                 PMD_INIT_LOG(DEBUG,
1737                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1738                                 config->mac[0], config->mac[1],
1739                                 config->mac[2], config->mac[3],
1740                                 config->mac[4], config->mac[5]);
1741         } else {
1742                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1743                 hw->max_queue_pairs = 1;
1744                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1745                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1746         }
1747
1748         ret = virtio_alloc_queues(eth_dev);
1749         if (ret < 0)
1750                 return ret;
1751
1752         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1753                 if (virtio_configure_intr(eth_dev) < 0) {
1754                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1755                         return -1;
1756                 }
1757         }
1758
1759         vtpci_reinit_complete(hw);
1760
1761         if (pci_dev)
1762                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1763                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1764                         pci_dev->id.device_id);
1765
1766         return 0;
1767 }
1768
1769 /*
1770  * Remap the PCI device again (IO port map for legacy device and
1771  * memory map for modern device), so that the secondary process
1772  * could have the PCI initiated correctly.
1773  */
1774 static int
1775 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1776 {
1777         if (hw->modern) {
1778                 /*
1779                  * We don't have to re-parse the PCI config space, since
1780                  * rte_pci_map_device() makes sure the mapped address
1781                  * in secondary process would equal to the one mapped in
1782                  * the primary process: error will be returned if that
1783                  * requirement is not met.
1784                  *
1785                  * That said, we could simply reuse all cap pointers
1786                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1787                  * primary process, which is stored in shared memory.
1788                  */
1789                 if (rte_pci_map_device(pci_dev)) {
1790                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1791                         return -1;
1792                 }
1793         } else {
1794                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1795                         return -1;
1796         }
1797
1798         return 0;
1799 }
1800
1801 static void
1802 virtio_set_vtpci_ops(struct virtio_hw *hw)
1803 {
1804 #ifdef RTE_VIRTIO_USER
1805         if (hw->virtio_user_dev)
1806                 VTPCI_OPS(hw) = &virtio_user_ops;
1807         else
1808 #endif
1809         if (hw->modern)
1810                 VTPCI_OPS(hw) = &modern_ops;
1811         else
1812                 VTPCI_OPS(hw) = &legacy_ops;
1813 }
1814
1815 /*
1816  * This function is based on probe() function in virtio_pci.c
1817  * It returns 0 on success.
1818  */
1819 int
1820 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1821 {
1822         struct virtio_hw *hw = eth_dev->data->dev_private;
1823         int ret;
1824
1825         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1826
1827         eth_dev->dev_ops = &virtio_eth_dev_ops;
1828
1829         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1830                 if (!hw->virtio_user_dev) {
1831                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1832                         if (ret)
1833                                 return ret;
1834                 }
1835
1836                 virtio_set_vtpci_ops(hw);
1837                 set_rxtx_funcs(eth_dev);
1838
1839                 return 0;
1840         }
1841
1842         /* Allocate memory for storing MAC addresses */
1843         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1844                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1845         if (eth_dev->data->mac_addrs == NULL) {
1846                 PMD_INIT_LOG(ERR,
1847                         "Failed to allocate %d bytes needed to store MAC addresses",
1848                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1849                 return -ENOMEM;
1850         }
1851
1852         hw->port_id = eth_dev->data->port_id;
1853         /* For virtio_user case the hw->virtio_user_dev is populated by
1854          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1855          */
1856         if (!hw->virtio_user_dev) {
1857                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1858                 if (ret)
1859                         goto out;
1860         }
1861
1862         /* reset device and negotiate default features */
1863         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1864         if (ret < 0)
1865                 goto out;
1866
1867         return 0;
1868
1869 out:
1870         rte_free(eth_dev->data->mac_addrs);
1871         eth_dev->data->mac_addrs = NULL;
1872         return ret;
1873 }
1874
1875 static int
1876 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1877 {
1878         PMD_INIT_FUNC_TRACE();
1879
1880         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1881                 return 0;
1882
1883         virtio_dev_stop(eth_dev);
1884         virtio_dev_close(eth_dev);
1885
1886         eth_dev->dev_ops = NULL;
1887         eth_dev->tx_pkt_burst = NULL;
1888         eth_dev->rx_pkt_burst = NULL;
1889
1890         if (eth_dev->device)
1891                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1892
1893         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1894
1895         return 0;
1896 }
1897
1898 static int vdpa_check_handler(__rte_unused const char *key,
1899                 const char *value, __rte_unused void *opaque)
1900 {
1901         if (strcmp(value, "1"))
1902                 return -1;
1903
1904         return 0;
1905 }
1906
1907 static int
1908 vdpa_mode_selected(struct rte_devargs *devargs)
1909 {
1910         struct rte_kvargs *kvlist;
1911         const char *key = "vdpa";
1912         int ret = 0;
1913
1914         if (devargs == NULL)
1915                 return 0;
1916
1917         kvlist = rte_kvargs_parse(devargs->args, NULL);
1918         if (kvlist == NULL)
1919                 return 0;
1920
1921         if (!rte_kvargs_count(kvlist, key))
1922                 goto exit;
1923
1924         /* vdpa mode selected when there's a key-value pair: vdpa=1 */
1925         if (rte_kvargs_process(kvlist, key,
1926                                 vdpa_check_handler, NULL) < 0) {
1927                 goto exit;
1928         }
1929         ret = 1;
1930
1931 exit:
1932         rte_kvargs_free(kvlist);
1933         return ret;
1934 }
1935
1936 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1937         struct rte_pci_device *pci_dev)
1938 {
1939         if (rte_eal_iopl_init() != 0) {
1940                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1941                 return 1;
1942         }
1943
1944         /* virtio pmd skips probe if device needs to work in vdpa mode */
1945         if (vdpa_mode_selected(pci_dev->device.devargs))
1946                 return 1;
1947
1948         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1949                 eth_virtio_dev_init);
1950 }
1951
1952 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1953 {
1954         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1955 }
1956
1957 static struct rte_pci_driver rte_virtio_pmd = {
1958         .driver = {
1959                 .name = "net_virtio",
1960         },
1961         .id_table = pci_id_virtio_map,
1962         .drv_flags = 0,
1963         .probe = eth_virtio_pci_probe,
1964         .remove = eth_virtio_pci_remove,
1965 };
1966
1967 RTE_INIT(rte_virtio_pmd_init)
1968 {
1969         rte_eal_iopl_init();
1970         rte_pci_register(&rte_virtio_pmd);
1971 }
1972
1973 static bool
1974 rx_offload_enabled(struct virtio_hw *hw)
1975 {
1976         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
1977                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1978                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
1979 }
1980
1981 static bool
1982 tx_offload_enabled(struct virtio_hw *hw)
1983 {
1984         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
1985                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
1986                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
1987 }
1988
1989 /*
1990  * Configure virtio device
1991  * It returns 0 on success.
1992  */
1993 static int
1994 virtio_dev_configure(struct rte_eth_dev *dev)
1995 {
1996         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1997         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
1998         struct virtio_hw *hw = dev->data->dev_private;
1999         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2000                 hw->vtnet_hdr_size;
2001         uint64_t rx_offloads = rxmode->offloads;
2002         uint64_t tx_offloads = txmode->offloads;
2003         uint64_t req_features;
2004         int ret;
2005
2006         PMD_INIT_LOG(DEBUG, "configure");
2007         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2008
2009         if (dev->data->dev_conf.intr_conf.rxq) {
2010                 ret = virtio_init_device(dev, hw->req_guest_features);
2011                 if (ret < 0)
2012                         return ret;
2013         }
2014
2015         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2016                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2017
2018         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2019                            DEV_RX_OFFLOAD_TCP_CKSUM))
2020                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2021
2022         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2023                 req_features |=
2024                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2025                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2026
2027         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2028                            DEV_TX_OFFLOAD_TCP_CKSUM))
2029                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2030
2031         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2032                 req_features |=
2033                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2034                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2035
2036         /* if request features changed, reinit the device */
2037         if (req_features != hw->req_guest_features) {
2038                 ret = virtio_init_device(dev, req_features);
2039                 if (ret < 0)
2040                         return ret;
2041         }
2042
2043         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2044                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2045                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2046                 PMD_DRV_LOG(ERR,
2047                         "rx checksum not available on this host");
2048                 return -ENOTSUP;
2049         }
2050
2051         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2052                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2053                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2054                 PMD_DRV_LOG(ERR,
2055                         "Large Receive Offload not available on this host");
2056                 return -ENOTSUP;
2057         }
2058
2059         /* start control queue */
2060         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2061                 virtio_dev_cq_start(dev);
2062
2063         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2064                 hw->vlan_strip = 1;
2065
2066         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2067             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2068                 PMD_DRV_LOG(ERR,
2069                             "vlan filtering not available on this host");
2070                 return -ENOTSUP;
2071         }
2072
2073         hw->has_tx_offload = tx_offload_enabled(hw);
2074         hw->has_rx_offload = rx_offload_enabled(hw);
2075
2076         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2077                 /* Enable vector (0) for Link State Intrerrupt */
2078                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2079                                 VIRTIO_MSI_NO_VECTOR) {
2080                         PMD_DRV_LOG(ERR, "failed to set config vector");
2081                         return -EBUSY;
2082                 }
2083
2084         rte_spinlock_init(&hw->state_lock);
2085
2086         hw->use_simple_rx = 1;
2087
2088         if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2089                 hw->use_inorder_tx = 1;
2090                 hw->use_inorder_rx = 1;
2091                 hw->use_simple_rx = 0;
2092         }
2093
2094         if (vtpci_packed_queue(hw)) {
2095                 hw->use_simple_rx = 0;
2096                 hw->use_inorder_rx = 0;
2097         }
2098
2099 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
2100         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2101                 hw->use_simple_rx = 0;
2102         }
2103 #endif
2104         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2105                  hw->use_simple_rx = 0;
2106         }
2107
2108         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2109                            DEV_RX_OFFLOAD_TCP_CKSUM |
2110                            DEV_RX_OFFLOAD_TCP_LRO |
2111                            DEV_RX_OFFLOAD_VLAN_STRIP))
2112                 hw->use_simple_rx = 0;
2113
2114         hw->opened = true;
2115
2116         return 0;
2117 }
2118
2119
2120 static int
2121 virtio_dev_start(struct rte_eth_dev *dev)
2122 {
2123         uint16_t nb_queues, i;
2124         struct virtnet_rx *rxvq;
2125         struct virtnet_tx *txvq __rte_unused;
2126         struct virtio_hw *hw = dev->data->dev_private;
2127         int ret;
2128
2129         /* Finish the initialization of the queues */
2130         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2131                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2132                 if (ret < 0)
2133                         return ret;
2134         }
2135         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2136                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2137                 if (ret < 0)
2138                         return ret;
2139         }
2140
2141         /* check if lsc interrupt feature is enabled */
2142         if (dev->data->dev_conf.intr_conf.lsc) {
2143                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2144                         PMD_DRV_LOG(ERR, "link status not supported by host");
2145                         return -ENOTSUP;
2146                 }
2147         }
2148
2149         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2150          * in device configure, but it could be unmapped  when device is
2151          * stopped.
2152          */
2153         if (dev->data->dev_conf.intr_conf.lsc ||
2154             dev->data->dev_conf.intr_conf.rxq) {
2155                 virtio_intr_disable(dev);
2156
2157                 /* Setup interrupt callback  */
2158                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2159                         rte_intr_callback_register(dev->intr_handle,
2160                                                    virtio_interrupt_handler,
2161                                                    dev);
2162
2163                 if (virtio_intr_enable(dev) < 0) {
2164                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2165                         return -EIO;
2166                 }
2167         }
2168
2169         /*Notify the backend
2170          *Otherwise the tap backend might already stop its queue due to fullness.
2171          *vhost backend will have no chance to be waked up
2172          */
2173         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2174         if (hw->max_queue_pairs > 1) {
2175                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2176                         return -EINVAL;
2177         }
2178
2179         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2180
2181         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2182                 rxvq = dev->data->rx_queues[i];
2183                 /* Flush the old packets */
2184                 virtqueue_rxvq_flush(rxvq->vq);
2185                 virtqueue_notify(rxvq->vq);
2186         }
2187
2188         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2189                 txvq = dev->data->tx_queues[i];
2190                 virtqueue_notify(txvq->vq);
2191         }
2192
2193         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2194
2195         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2196                 rxvq = dev->data->rx_queues[i];
2197                 VIRTQUEUE_DUMP(rxvq->vq);
2198         }
2199
2200         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2201                 txvq = dev->data->tx_queues[i];
2202                 VIRTQUEUE_DUMP(txvq->vq);
2203         }
2204
2205         set_rxtx_funcs(dev);
2206         hw->started = true;
2207
2208         /* Initialize Link state */
2209         virtio_dev_link_update(dev, 0);
2210
2211         return 0;
2212 }
2213
2214 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2215 {
2216         struct virtio_hw *hw = dev->data->dev_private;
2217         uint16_t nr_vq = virtio_get_nr_vq(hw);
2218         const char *type __rte_unused;
2219         unsigned int i, mbuf_num = 0;
2220         struct virtqueue *vq;
2221         struct rte_mbuf *buf;
2222         int queue_type;
2223
2224         if (hw->vqs == NULL)
2225                 return;
2226
2227         for (i = 0; i < nr_vq; i++) {
2228                 vq = hw->vqs[i];
2229                 if (!vq)
2230                         continue;
2231
2232                 queue_type = virtio_get_queue_type(hw, i);
2233                 if (queue_type == VTNET_RQ)
2234                         type = "rxq";
2235                 else if (queue_type == VTNET_TQ)
2236                         type = "txq";
2237                 else
2238                         continue;
2239
2240                 PMD_INIT_LOG(DEBUG,
2241                         "Before freeing %s[%d] used and unused buf",
2242                         type, i);
2243                 VIRTQUEUE_DUMP(vq);
2244
2245                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2246                         rte_pktmbuf_free(buf);
2247                         mbuf_num++;
2248                 }
2249
2250                 PMD_INIT_LOG(DEBUG,
2251                         "After freeing %s[%d] used and unused buf",
2252                         type, i);
2253                 VIRTQUEUE_DUMP(vq);
2254         }
2255
2256         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2257 }
2258
2259 /*
2260  * Stop device: disable interrupt and mark link down
2261  */
2262 static void
2263 virtio_dev_stop(struct rte_eth_dev *dev)
2264 {
2265         struct virtio_hw *hw = dev->data->dev_private;
2266         struct rte_eth_link link;
2267         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2268
2269         PMD_INIT_LOG(DEBUG, "stop");
2270
2271         rte_spinlock_lock(&hw->state_lock);
2272         if (!hw->started)
2273                 goto out_unlock;
2274         hw->started = false;
2275
2276         if (intr_conf->lsc || intr_conf->rxq) {
2277                 virtio_intr_disable(dev);
2278
2279                 /* Reset interrupt callback  */
2280                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2281                         rte_intr_callback_unregister(dev->intr_handle,
2282                                                      virtio_interrupt_handler,
2283                                                      dev);
2284                 }
2285         }
2286
2287         memset(&link, 0, sizeof(link));
2288         rte_eth_linkstatus_set(dev, &link);
2289 out_unlock:
2290         rte_spinlock_unlock(&hw->state_lock);
2291 }
2292
2293 static int
2294 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2295 {
2296         struct rte_eth_link link;
2297         uint16_t status;
2298         struct virtio_hw *hw = dev->data->dev_private;
2299
2300         memset(&link, 0, sizeof(link));
2301         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2302         link.link_speed  = ETH_SPEED_NUM_10G;
2303         link.link_autoneg = ETH_LINK_FIXED;
2304
2305         if (!hw->started) {
2306                 link.link_status = ETH_LINK_DOWN;
2307         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2308                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2309                 vtpci_read_dev_config(hw,
2310                                 offsetof(struct virtio_net_config, status),
2311                                 &status, sizeof(status));
2312                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2313                         link.link_status = ETH_LINK_DOWN;
2314                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2315                                      dev->data->port_id);
2316                 } else {
2317                         link.link_status = ETH_LINK_UP;
2318                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2319                                      dev->data->port_id);
2320                 }
2321         } else {
2322                 link.link_status = ETH_LINK_UP;
2323         }
2324
2325         return rte_eth_linkstatus_set(dev, &link);
2326 }
2327
2328 static int
2329 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2330 {
2331         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2332         struct virtio_hw *hw = dev->data->dev_private;
2333         uint64_t offloads = rxmode->offloads;
2334
2335         if (mask & ETH_VLAN_FILTER_MASK) {
2336                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2337                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2338
2339                         PMD_DRV_LOG(NOTICE,
2340                                 "vlan filtering not available on this host");
2341
2342                         return -ENOTSUP;
2343                 }
2344         }
2345
2346         if (mask & ETH_VLAN_STRIP_MASK)
2347                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2348
2349         return 0;
2350 }
2351
2352 static void
2353 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2354 {
2355         uint64_t tso_mask, host_features;
2356         struct virtio_hw *hw = dev->data->dev_private;
2357
2358         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2359
2360         dev_info->max_rx_queues =
2361                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2362         dev_info->max_tx_queues =
2363                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2364         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2365         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2366         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2367
2368         host_features = VTPCI_OPS(hw)->get_features(hw);
2369         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2370         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2371         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2372                 dev_info->rx_offload_capa |=
2373                         DEV_RX_OFFLOAD_TCP_CKSUM |
2374                         DEV_RX_OFFLOAD_UDP_CKSUM;
2375         }
2376         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2377                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2378         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2379                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2380         if ((host_features & tso_mask) == tso_mask)
2381                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2382
2383         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2384                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2385         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2386                 dev_info->tx_offload_capa |=
2387                         DEV_TX_OFFLOAD_UDP_CKSUM |
2388                         DEV_TX_OFFLOAD_TCP_CKSUM;
2389         }
2390         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2391                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2392         if ((host_features & tso_mask) == tso_mask)
2393                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2394 }
2395
2396 /*
2397  * It enables testpmd to collect per queue stats.
2398  */
2399 static int
2400 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2401 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2402 __rte_unused uint8_t is_rx)
2403 {
2404         return 0;
2405 }
2406
2407 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2408 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2409 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2410
2411 RTE_INIT(virtio_init_log)
2412 {
2413         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2414         if (virtio_logtype_init >= 0)
2415                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2416         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2417         if (virtio_logtype_driver >= 0)
2418                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2419 }