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 = 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 < ETHER_MIN_MTU || frame_size > max_frame_size) {
 843                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 844                         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, 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, ETHER_ADDR_LEN);
1110         } else {
1111                 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 * ETHER_ADDR_LEN + sizeof(uc->entries);
1133         memcpy(ctrl.data, uc, len[0]);
1134
1135         len[1] = mc->entries * 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 * ETHER_ADDR_LEN + sizeof(uc->entries));
1159         uc->entries = 0;
1160         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1161         mc->entries = 0;
1162
1163         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1164                 const struct rte_ether_addr *addr
1165                         = (i == index) ? mac_addr : addrs + i;
1166                 struct virtio_net_ctrl_mac *tbl
1167                         = is_multicast_ether_addr(addr) ? mc : uc;
1168
1169                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1170         }
1171
1172         return virtio_mac_table_set(hw, uc, mc);
1173 }
1174
1175 static void
1176 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1177 {
1178         struct virtio_hw *hw = dev->data->dev_private;
1179         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1180         struct virtio_net_ctrl_mac *uc, *mc;
1181         unsigned int i;
1182
1183         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1184                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1185                 return;
1186         }
1187
1188         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1189         uc->entries = 0;
1190         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1191         mc->entries = 0;
1192
1193         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1194                 struct virtio_net_ctrl_mac *tbl;
1195
1196                 if (i == index || is_zero_ether_addr(addrs + i))
1197                         continue;
1198
1199                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1200                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1201         }
1202
1203         virtio_mac_table_set(hw, uc, mc);
1204 }
1205
1206 static int
1207 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1208 {
1209         struct virtio_hw *hw = dev->data->dev_private;
1210
1211         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1212
1213         /* Use atomic update if available */
1214         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1215                 struct virtio_pmd_ctrl ctrl;
1216                 int len = ETHER_ADDR_LEN;
1217
1218                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1219                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1220
1221                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1222                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1223         }
1224
1225         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1226                 return -ENOTSUP;
1227
1228         virtio_set_hwaddr(hw);
1229         return 0;
1230 }
1231
1232 static int
1233 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1234 {
1235         struct virtio_hw *hw = dev->data->dev_private;
1236         struct virtio_pmd_ctrl ctrl;
1237         int len;
1238
1239         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1240                 return -ENOTSUP;
1241
1242         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1243         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1244         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1245         len = sizeof(vlan_id);
1246
1247         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1248 }
1249
1250 static int
1251 virtio_intr_enable(struct rte_eth_dev *dev)
1252 {
1253         struct virtio_hw *hw = dev->data->dev_private;
1254
1255         if (rte_intr_enable(dev->intr_handle) < 0)
1256                 return -1;
1257
1258         if (!hw->virtio_user_dev)
1259                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1260
1261         return 0;
1262 }
1263
1264 static int
1265 virtio_intr_disable(struct rte_eth_dev *dev)
1266 {
1267         struct virtio_hw *hw = dev->data->dev_private;
1268
1269         if (rte_intr_disable(dev->intr_handle) < 0)
1270                 return -1;
1271
1272         if (!hw->virtio_user_dev)
1273                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1274
1275         return 0;
1276 }
1277
1278 static int
1279 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1280 {
1281         uint64_t host_features;
1282
1283         /* Prepare guest_features: feature that driver wants to support */
1284         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1285                 req_features);
1286
1287         /* Read device(host) feature bits */
1288         host_features = VTPCI_OPS(hw)->get_features(hw);
1289         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1290                 host_features);
1291
1292         /* If supported, ensure MTU value is valid before acknowledging it. */
1293         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1294                 struct virtio_net_config config;
1295
1296                 vtpci_read_dev_config(hw,
1297                         offsetof(struct virtio_net_config, mtu),
1298                         &config.mtu, sizeof(config.mtu));
1299
1300                 if (config.mtu < ETHER_MIN_MTU)
1301                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1302         }
1303
1304         /*
1305          * Negotiate features: Subset of device feature bits are written back
1306          * guest feature bits.
1307          */
1308         hw->guest_features = req_features;
1309         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1310         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1311                 hw->guest_features);
1312
1313         if (hw->modern) {
1314                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1315                         PMD_INIT_LOG(ERR,
1316                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1317                         return -1;
1318                 }
1319                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1320                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1321                         PMD_INIT_LOG(ERR,
1322                                 "failed to set FEATURES_OK status!");
1323                         return -1;
1324                 }
1325         }
1326
1327         hw->req_guest_features = req_features;
1328
1329         return 0;
1330 }
1331
1332 int
1333 virtio_dev_pause(struct rte_eth_dev *dev)
1334 {
1335         struct virtio_hw *hw = dev->data->dev_private;
1336
1337         rte_spinlock_lock(&hw->state_lock);
1338
1339         if (hw->started == 0) {
1340                 /* Device is just stopped. */
1341                 rte_spinlock_unlock(&hw->state_lock);
1342                 return -1;
1343         }
1344         hw->started = 0;
1345         /*
1346          * Prevent the worker threads from touching queues to avoid contention,
1347          * 1 ms should be enough for the ongoing Tx function to finish.
1348          */
1349         rte_delay_ms(1);
1350         return 0;
1351 }
1352
1353 /*
1354  * Recover hw state to let the worker threads continue.
1355  */
1356 void
1357 virtio_dev_resume(struct rte_eth_dev *dev)
1358 {
1359         struct virtio_hw *hw = dev->data->dev_private;
1360
1361         hw->started = 1;
1362         rte_spinlock_unlock(&hw->state_lock);
1363 }
1364
1365 /*
1366  * Should be called only after device is paused.
1367  */
1368 int
1369 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1370                 int nb_pkts)
1371 {
1372         struct virtio_hw *hw = dev->data->dev_private;
1373         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1374         int ret;
1375
1376         hw->inject_pkts = tx_pkts;
1377         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1378         hw->inject_pkts = NULL;
1379
1380         return ret;
1381 }
1382
1383 static void
1384 virtio_notify_peers(struct rte_eth_dev *dev)
1385 {
1386         struct virtio_hw *hw = dev->data->dev_private;
1387         struct virtnet_rx *rxvq;
1388         struct rte_mbuf *rarp_mbuf;
1389
1390         if (!dev->data->rx_queues)
1391                 return;
1392
1393         rxvq = dev->data->rx_queues[0];
1394         if (!rxvq)
1395                 return;
1396
1397         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1398                         (struct rte_ether_addr *)hw->mac_addr);
1399         if (rarp_mbuf == NULL) {
1400                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1401                 return;
1402         }
1403
1404         /* If virtio port just stopped, no need to send RARP */
1405         if (virtio_dev_pause(dev) < 0) {
1406                 rte_pktmbuf_free(rarp_mbuf);
1407                 return;
1408         }
1409
1410         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1411         virtio_dev_resume(dev);
1412 }
1413
1414 static void
1415 virtio_ack_link_announce(struct rte_eth_dev *dev)
1416 {
1417         struct virtio_hw *hw = dev->data->dev_private;
1418         struct virtio_pmd_ctrl ctrl;
1419
1420         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1421         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1422
1423         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1424 }
1425
1426 /*
1427  * Process virtio config changed interrupt. Call the callback
1428  * if link state changed, generate gratuitous RARP packet if
1429  * the status indicates an ANNOUNCE.
1430  */
1431 void
1432 virtio_interrupt_handler(void *param)
1433 {
1434         struct rte_eth_dev *dev = param;
1435         struct virtio_hw *hw = dev->data->dev_private;
1436         uint8_t isr;
1437         uint16_t status;
1438
1439         /* Read interrupt status which clears interrupt */
1440         isr = vtpci_isr(hw);
1441         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1442
1443         if (virtio_intr_enable(dev) < 0)
1444                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1445
1446         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1447                 if (virtio_dev_link_update(dev, 0) == 0)
1448                         _rte_eth_dev_callback_process(dev,
1449                                                       RTE_ETH_EVENT_INTR_LSC,
1450                                                       NULL);
1451
1452                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1453                         vtpci_read_dev_config(hw,
1454                                 offsetof(struct virtio_net_config, status),
1455                                 &status, sizeof(status));
1456                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1457                                 virtio_notify_peers(dev);
1458                                 if (hw->cvq)
1459                                         virtio_ack_link_announce(dev);
1460                         }
1461                 }
1462         }
1463 }
1464
1465 /* set rx and tx handlers according to what is supported */
1466 static void
1467 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1468 {
1469         struct virtio_hw *hw = eth_dev->data->dev_private;
1470
1471         if (vtpci_packed_queue(hw)) {
1472                 PMD_INIT_LOG(INFO,
1473                         "virtio: using packed ring %s Tx path on port %u",
1474                         hw->use_inorder_tx ? "inorder" : "standard",
1475                         eth_dev->data->port_id);
1476                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1477         } else {
1478                 if (hw->use_inorder_tx) {
1479                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1480                                 eth_dev->data->port_id);
1481                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1482                 } else {
1483                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1484                                 eth_dev->data->port_id);
1485                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1486                 }
1487         }
1488
1489         if (vtpci_packed_queue(hw)) {
1490                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1491                         PMD_INIT_LOG(INFO,
1492                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1493                                 eth_dev->data->port_id);
1494                         eth_dev->rx_pkt_burst =
1495                                 &virtio_recv_mergeable_pkts_packed;
1496                 } else {
1497                         PMD_INIT_LOG(INFO,
1498                                 "virtio: using packed ring standard Rx path on port %u",
1499                                 eth_dev->data->port_id);
1500                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1501                 }
1502         } else {
1503                 if (hw->use_simple_rx) {
1504                         PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1505                                 eth_dev->data->port_id);
1506                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1507                 } else if (hw->use_inorder_rx) {
1508                         PMD_INIT_LOG(INFO,
1509                                 "virtio: using inorder Rx path on port %u",
1510                                 eth_dev->data->port_id);
1511                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1512                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1513                         PMD_INIT_LOG(INFO,
1514                                 "virtio: using mergeable buffer Rx path on port %u",
1515                                 eth_dev->data->port_id);
1516                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1517                 } else {
1518                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1519                                 eth_dev->data->port_id);
1520                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1521                 }
1522         }
1523
1524 }
1525
1526 /* Only support 1:1 queue/interrupt mapping so far.
1527  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1528  * interrupt vectors (<N+1).
1529  */
1530 static int
1531 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1532 {
1533         uint32_t i;
1534         struct virtio_hw *hw = dev->data->dev_private;
1535
1536         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1537         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1538                 dev->intr_handle->intr_vec[i] = i + 1;
1539                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1540                                                  VIRTIO_MSI_NO_VECTOR) {
1541                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1542                         return -EBUSY;
1543                 }
1544         }
1545
1546         return 0;
1547 }
1548
1549 static void
1550 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1551 {
1552         uint32_t i;
1553         struct virtio_hw *hw = dev->data->dev_private;
1554
1555         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1556         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1557                 VTPCI_OPS(hw)->set_queue_irq(hw,
1558                                              hw->vqs[i * VTNET_CQ],
1559                                              VIRTIO_MSI_NO_VECTOR);
1560 }
1561
1562 static int
1563 virtio_configure_intr(struct rte_eth_dev *dev)
1564 {
1565         struct virtio_hw *hw = dev->data->dev_private;
1566
1567         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1568                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1569                 return -ENOTSUP;
1570         }
1571
1572         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1573                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1574                 return -1;
1575         }
1576
1577         if (!dev->intr_handle->intr_vec) {
1578                 dev->intr_handle->intr_vec =
1579                         rte_zmalloc("intr_vec",
1580                                     hw->max_queue_pairs * sizeof(int), 0);
1581                 if (!dev->intr_handle->intr_vec) {
1582                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1583                                      hw->max_queue_pairs);
1584                         return -ENOMEM;
1585                 }
1586         }
1587
1588         /* Re-register callback to update max_intr */
1589         rte_intr_callback_unregister(dev->intr_handle,
1590                                      virtio_interrupt_handler,
1591                                      dev);
1592         rte_intr_callback_register(dev->intr_handle,
1593                                    virtio_interrupt_handler,
1594                                    dev);
1595
1596         /* DO NOT try to remove this! This function will enable msix, or QEMU
1597          * will encounter SIGSEGV when DRIVER_OK is sent.
1598          * And for legacy devices, this should be done before queue/vec binding
1599          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1600          * (22) will be ignored.
1601          */
1602         if (virtio_intr_enable(dev) < 0) {
1603                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1604                 return -1;
1605         }
1606
1607         if (virtio_queues_bind_intr(dev) < 0) {
1608                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1609                 return -1;
1610         }
1611
1612         return 0;
1613 }
1614
1615 /* reset device and renegotiate features if needed */
1616 static int
1617 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1618 {
1619         struct virtio_hw *hw = eth_dev->data->dev_private;
1620         struct virtio_net_config *config;
1621         struct virtio_net_config local_config;
1622         struct rte_pci_device *pci_dev = NULL;
1623         int ret;
1624
1625         /* Reset the device although not necessary at startup */
1626         vtpci_reset(hw);
1627
1628         if (hw->vqs) {
1629                 virtio_dev_free_mbufs(eth_dev);
1630                 virtio_free_queues(hw);
1631         }
1632
1633         /* Tell the host we've noticed this device. */
1634         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1635
1636         /* Tell the host we've known how to drive the device. */
1637         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1638         if (virtio_negotiate_features(hw, req_features) < 0)
1639                 return -1;
1640
1641         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1642
1643         if (!hw->virtio_user_dev) {
1644                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1645                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1646         }
1647
1648         /* If host does not support both status and MSI-X then disable LSC */
1649         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1650             hw->use_msix != VIRTIO_MSIX_NONE)
1651                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1652         else
1653                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1654
1655         /* Setting up rx_header size for the device */
1656         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1657             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1658             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1659                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1660         else
1661                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1662
1663         /* Copy the permanent MAC address to: virtio_hw */
1664         virtio_get_hwaddr(hw);
1665         ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1666                         &eth_dev->data->mac_addrs[0]);
1667         PMD_INIT_LOG(DEBUG,
1668                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1669                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1670                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1671
1672         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1673                 config = &local_config;
1674
1675                 vtpci_read_dev_config(hw,
1676                         offsetof(struct virtio_net_config, mac),
1677                         &config->mac, sizeof(config->mac));
1678
1679                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1680                         vtpci_read_dev_config(hw,
1681                                 offsetof(struct virtio_net_config, status),
1682                                 &config->status, sizeof(config->status));
1683                 } else {
1684                         PMD_INIT_LOG(DEBUG,
1685                                      "VIRTIO_NET_F_STATUS is not supported");
1686                         config->status = 0;
1687                 }
1688
1689                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1690                         vtpci_read_dev_config(hw,
1691                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1692                                 &config->max_virtqueue_pairs,
1693                                 sizeof(config->max_virtqueue_pairs));
1694                 } else {
1695                         PMD_INIT_LOG(DEBUG,
1696                                      "VIRTIO_NET_F_MQ is not supported");
1697                         config->max_virtqueue_pairs = 1;
1698                 }
1699
1700                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1701
1702                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1703                         vtpci_read_dev_config(hw,
1704                                 offsetof(struct virtio_net_config, mtu),
1705                                 &config->mtu,
1706                                 sizeof(config->mtu));
1707
1708                         /*
1709                          * MTU value has already been checked at negotiation
1710                          * time, but check again in case it has changed since
1711                          * then, which should not happen.
1712                          */
1713                         if (config->mtu < ETHER_MIN_MTU) {
1714                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1715                                                 config->mtu);
1716                                 return -1;
1717                         }
1718
1719                         hw->max_mtu = config->mtu;
1720                         /* Set initial MTU to maximum one supported by vhost */
1721                         eth_dev->data->mtu = config->mtu;
1722
1723                 } else {
1724                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1725                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1726                 }
1727
1728                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1729                                 config->max_virtqueue_pairs);
1730                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1731                 PMD_INIT_LOG(DEBUG,
1732                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1733                                 config->mac[0], config->mac[1],
1734                                 config->mac[2], config->mac[3],
1735                                 config->mac[4], config->mac[5]);
1736         } else {
1737                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1738                 hw->max_queue_pairs = 1;
1739                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1740                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1741         }
1742
1743         ret = virtio_alloc_queues(eth_dev);
1744         if (ret < 0)
1745                 return ret;
1746
1747         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1748                 if (virtio_configure_intr(eth_dev) < 0) {
1749                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1750                         return -1;
1751                 }
1752         }
1753
1754         vtpci_reinit_complete(hw);
1755
1756         if (pci_dev)
1757                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1758                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1759                         pci_dev->id.device_id);
1760
1761         return 0;
1762 }
1763
1764 /*
1765  * Remap the PCI device again (IO port map for legacy device and
1766  * memory map for modern device), so that the secondary process
1767  * could have the PCI initiated correctly.
1768  */
1769 static int
1770 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1771 {
1772         if (hw->modern) {
1773                 /*
1774                  * We don't have to re-parse the PCI config space, since
1775                  * rte_pci_map_device() makes sure the mapped address
1776                  * in secondary process would equal to the one mapped in
1777                  * the primary process: error will be returned if that
1778                  * requirement is not met.
1779                  *
1780                  * That said, we could simply reuse all cap pointers
1781                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1782                  * primary process, which is stored in shared memory.
1783                  */
1784                 if (rte_pci_map_device(pci_dev)) {
1785                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1786                         return -1;
1787                 }
1788         } else {
1789                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1790                         return -1;
1791         }
1792
1793         return 0;
1794 }
1795
1796 static void
1797 virtio_set_vtpci_ops(struct virtio_hw *hw)
1798 {
1799 #ifdef RTE_VIRTIO_USER
1800         if (hw->virtio_user_dev)
1801                 VTPCI_OPS(hw) = &virtio_user_ops;
1802         else
1803 #endif
1804         if (hw->modern)
1805                 VTPCI_OPS(hw) = &modern_ops;
1806         else
1807                 VTPCI_OPS(hw) = &legacy_ops;
1808 }
1809
1810 /*
1811  * This function is based on probe() function in virtio_pci.c
1812  * It returns 0 on success.
1813  */
1814 int
1815 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1816 {
1817         struct virtio_hw *hw = eth_dev->data->dev_private;
1818         int ret;
1819
1820         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1821
1822         eth_dev->dev_ops = &virtio_eth_dev_ops;
1823
1824         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1825                 if (!hw->virtio_user_dev) {
1826                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1827                         if (ret)
1828                                 return ret;
1829                 }
1830
1831                 virtio_set_vtpci_ops(hw);
1832                 set_rxtx_funcs(eth_dev);
1833
1834                 return 0;
1835         }
1836
1837         /* Allocate memory for storing MAC addresses */
1838         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1839         if (eth_dev->data->mac_addrs == NULL) {
1840                 PMD_INIT_LOG(ERR,
1841                         "Failed to allocate %d bytes needed to store MAC addresses",
1842                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1843                 return -ENOMEM;
1844         }
1845
1846         hw->port_id = eth_dev->data->port_id;
1847         /* For virtio_user case the hw->virtio_user_dev is populated by
1848          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1849          */
1850         if (!hw->virtio_user_dev) {
1851                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1852                 if (ret)
1853                         goto out;
1854         }
1855
1856         /* reset device and negotiate default features */
1857         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1858         if (ret < 0)
1859                 goto out;
1860
1861         return 0;
1862
1863 out:
1864         rte_free(eth_dev->data->mac_addrs);
1865         eth_dev->data->mac_addrs = NULL;
1866         return ret;
1867 }
1868
1869 static int
1870 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1871 {
1872         PMD_INIT_FUNC_TRACE();
1873
1874         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1875                 return 0;
1876
1877         virtio_dev_stop(eth_dev);
1878         virtio_dev_close(eth_dev);
1879
1880         eth_dev->dev_ops = NULL;
1881         eth_dev->tx_pkt_burst = NULL;
1882         eth_dev->rx_pkt_burst = NULL;
1883
1884         if (eth_dev->device)
1885                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1886
1887         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1888
1889         return 0;
1890 }
1891
1892 static int vdpa_check_handler(__rte_unused const char *key,
1893                 const char *value, __rte_unused void *opaque)
1894 {
1895         if (strcmp(value, "1"))
1896                 return -1;
1897
1898         return 0;
1899 }
1900
1901 static int
1902 vdpa_mode_selected(struct rte_devargs *devargs)
1903 {
1904         struct rte_kvargs *kvlist;
1905         const char *key = "vdpa";
1906         int ret = 0;
1907
1908         if (devargs == NULL)
1909                 return 0;
1910
1911         kvlist = rte_kvargs_parse(devargs->args, NULL);
1912         if (kvlist == NULL)
1913                 return 0;
1914
1915         if (!rte_kvargs_count(kvlist, key))
1916                 goto exit;
1917
1918         /* vdpa mode selected when there's a key-value pair: vdpa=1 */
1919         if (rte_kvargs_process(kvlist, key,
1920                                 vdpa_check_handler, NULL) < 0) {
1921                 goto exit;
1922         }
1923         ret = 1;
1924
1925 exit:
1926         rte_kvargs_free(kvlist);
1927         return ret;
1928 }
1929
1930 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1931         struct rte_pci_device *pci_dev)
1932 {
1933         if (rte_eal_iopl_init() != 0) {
1934                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1935                 return 1;
1936         }
1937
1938         /* virtio pmd skips probe if device needs to work in vdpa mode */
1939         if (vdpa_mode_selected(pci_dev->device.devargs))
1940                 return 1;
1941
1942         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1943                 eth_virtio_dev_init);
1944 }
1945
1946 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1947 {
1948         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1949 }
1950
1951 static struct rte_pci_driver rte_virtio_pmd = {
1952         .driver = {
1953                 .name = "net_virtio",
1954         },
1955         .id_table = pci_id_virtio_map,
1956         .drv_flags = 0,
1957         .probe = eth_virtio_pci_probe,
1958         .remove = eth_virtio_pci_remove,
1959 };
1960
1961 RTE_INIT(rte_virtio_pmd_init)
1962 {
1963         rte_eal_iopl_init();
1964         rte_pci_register(&rte_virtio_pmd);
1965 }
1966
1967 static bool
1968 rx_offload_enabled(struct virtio_hw *hw)
1969 {
1970         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
1971                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1972                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
1973 }
1974
1975 static bool
1976 tx_offload_enabled(struct virtio_hw *hw)
1977 {
1978         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
1979                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
1980                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
1981 }
1982
1983 /*
1984  * Configure virtio device
1985  * It returns 0 on success.
1986  */
1987 static int
1988 virtio_dev_configure(struct rte_eth_dev *dev)
1989 {
1990         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1991         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
1992         struct virtio_hw *hw = dev->data->dev_private;
1993         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
1994                 hw->vtnet_hdr_size;
1995         uint64_t rx_offloads = rxmode->offloads;
1996         uint64_t tx_offloads = txmode->offloads;
1997         uint64_t req_features;
1998         int ret;
1999
2000         PMD_INIT_LOG(DEBUG, "configure");
2001         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2002
2003         if (dev->data->dev_conf.intr_conf.rxq) {
2004                 ret = virtio_init_device(dev, hw->req_guest_features);
2005                 if (ret < 0)
2006                         return ret;
2007         }
2008
2009         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2010                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2011
2012         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2013                            DEV_RX_OFFLOAD_TCP_CKSUM))
2014                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2015
2016         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2017                 req_features |=
2018                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2019                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2020
2021         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2022                            DEV_TX_OFFLOAD_TCP_CKSUM))
2023                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2024
2025         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2026                 req_features |=
2027                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2028                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2029
2030         /* if request features changed, reinit the device */
2031         if (req_features != hw->req_guest_features) {
2032                 ret = virtio_init_device(dev, req_features);
2033                 if (ret < 0)
2034                         return ret;
2035         }
2036
2037         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2038                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2039                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2040                 PMD_DRV_LOG(ERR,
2041                         "rx checksum not available on this host");
2042                 return -ENOTSUP;
2043         }
2044
2045         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2046                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2047                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2048                 PMD_DRV_LOG(ERR,
2049                         "Large Receive Offload not available on this host");
2050                 return -ENOTSUP;
2051         }
2052
2053         /* start control queue */
2054         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2055                 virtio_dev_cq_start(dev);
2056
2057         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2058                 hw->vlan_strip = 1;
2059
2060         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2061             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2062                 PMD_DRV_LOG(ERR,
2063                             "vlan filtering not available on this host");
2064                 return -ENOTSUP;
2065         }
2066
2067         hw->has_tx_offload = tx_offload_enabled(hw);
2068         hw->has_rx_offload = rx_offload_enabled(hw);
2069
2070         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2071                 /* Enable vector (0) for Link State Intrerrupt */
2072                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2073                                 VIRTIO_MSI_NO_VECTOR) {
2074                         PMD_DRV_LOG(ERR, "failed to set config vector");
2075                         return -EBUSY;
2076                 }
2077
2078         rte_spinlock_init(&hw->state_lock);
2079
2080         hw->use_simple_rx = 1;
2081
2082         if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2083                 hw->use_inorder_tx = 1;
2084                 hw->use_inorder_rx = 1;
2085                 hw->use_simple_rx = 0;
2086         }
2087
2088         if (vtpci_packed_queue(hw)) {
2089                 hw->use_simple_rx = 0;
2090                 hw->use_inorder_rx = 0;
2091         }
2092
2093 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
2094         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2095                 hw->use_simple_rx = 0;
2096         }
2097 #endif
2098         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2099                  hw->use_simple_rx = 0;
2100         }
2101
2102         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2103                            DEV_RX_OFFLOAD_TCP_CKSUM |
2104                            DEV_RX_OFFLOAD_TCP_LRO |
2105                            DEV_RX_OFFLOAD_VLAN_STRIP))
2106                 hw->use_simple_rx = 0;
2107
2108         hw->opened = true;
2109
2110         return 0;
2111 }
2112
2113
2114 static int
2115 virtio_dev_start(struct rte_eth_dev *dev)
2116 {
2117         uint16_t nb_queues, i;
2118         struct virtnet_rx *rxvq;
2119         struct virtnet_tx *txvq __rte_unused;
2120         struct virtio_hw *hw = dev->data->dev_private;
2121         int ret;
2122
2123         /* Finish the initialization of the queues */
2124         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2125                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2126                 if (ret < 0)
2127                         return ret;
2128         }
2129         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2130                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2131                 if (ret < 0)
2132                         return ret;
2133         }
2134
2135         /* check if lsc interrupt feature is enabled */
2136         if (dev->data->dev_conf.intr_conf.lsc) {
2137                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2138                         PMD_DRV_LOG(ERR, "link status not supported by host");
2139                         return -ENOTSUP;
2140                 }
2141         }
2142
2143         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2144          * in device configure, but it could be unmapped  when device is
2145          * stopped.
2146          */
2147         if (dev->data->dev_conf.intr_conf.lsc ||
2148             dev->data->dev_conf.intr_conf.rxq) {
2149                 virtio_intr_disable(dev);
2150
2151                 /* Setup interrupt callback  */
2152                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2153                         rte_intr_callback_register(dev->intr_handle,
2154                                                    virtio_interrupt_handler,
2155                                                    dev);
2156
2157                 if (virtio_intr_enable(dev) < 0) {
2158                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2159                         return -EIO;
2160                 }
2161         }
2162
2163         /*Notify the backend
2164          *Otherwise the tap backend might already stop its queue due to fullness.
2165          *vhost backend will have no chance to be waked up
2166          */
2167         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2168         if (hw->max_queue_pairs > 1) {
2169                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2170                         return -EINVAL;
2171         }
2172
2173         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2174
2175         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2176                 rxvq = dev->data->rx_queues[i];
2177                 /* Flush the old packets */
2178                 virtqueue_rxvq_flush(rxvq->vq);
2179                 virtqueue_notify(rxvq->vq);
2180         }
2181
2182         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2183                 txvq = dev->data->tx_queues[i];
2184                 virtqueue_notify(txvq->vq);
2185         }
2186
2187         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2188
2189         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2190                 rxvq = dev->data->rx_queues[i];
2191                 VIRTQUEUE_DUMP(rxvq->vq);
2192         }
2193
2194         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2195                 txvq = dev->data->tx_queues[i];
2196                 VIRTQUEUE_DUMP(txvq->vq);
2197         }
2198
2199         set_rxtx_funcs(dev);
2200         hw->started = true;
2201
2202         /* Initialize Link state */
2203         virtio_dev_link_update(dev, 0);
2204
2205         return 0;
2206 }
2207
2208 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2209 {
2210         struct virtio_hw *hw = dev->data->dev_private;
2211         uint16_t nr_vq = virtio_get_nr_vq(hw);
2212         const char *type __rte_unused;
2213         unsigned int i, mbuf_num = 0;
2214         struct virtqueue *vq;
2215         struct rte_mbuf *buf;
2216         int queue_type;
2217
2218         if (hw->vqs == NULL)
2219                 return;
2220
2221         for (i = 0; i < nr_vq; i++) {
2222                 vq = hw->vqs[i];
2223                 if (!vq)
2224                         continue;
2225
2226                 queue_type = virtio_get_queue_type(hw, i);
2227                 if (queue_type == VTNET_RQ)
2228                         type = "rxq";
2229                 else if (queue_type == VTNET_TQ)
2230                         type = "txq";
2231                 else
2232                         continue;
2233
2234                 PMD_INIT_LOG(DEBUG,
2235                         "Before freeing %s[%d] used and unused buf",
2236                         type, i);
2237                 VIRTQUEUE_DUMP(vq);
2238
2239                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2240                         rte_pktmbuf_free(buf);
2241                         mbuf_num++;
2242                 }
2243
2244                 PMD_INIT_LOG(DEBUG,
2245                         "After freeing %s[%d] used and unused buf",
2246                         type, i);
2247                 VIRTQUEUE_DUMP(vq);
2248         }
2249
2250         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2251 }
2252
2253 /*
2254  * Stop device: disable interrupt and mark link down
2255  */
2256 static void
2257 virtio_dev_stop(struct rte_eth_dev *dev)
2258 {
2259         struct virtio_hw *hw = dev->data->dev_private;
2260         struct rte_eth_link link;
2261         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2262
2263         PMD_INIT_LOG(DEBUG, "stop");
2264
2265         rte_spinlock_lock(&hw->state_lock);
2266         if (!hw->started)
2267                 goto out_unlock;
2268         hw->started = false;
2269
2270         if (intr_conf->lsc || intr_conf->rxq) {
2271                 virtio_intr_disable(dev);
2272
2273                 /* Reset interrupt callback  */
2274                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2275                         rte_intr_callback_unregister(dev->intr_handle,
2276                                                      virtio_interrupt_handler,
2277                                                      dev);
2278                 }
2279         }
2280
2281         memset(&link, 0, sizeof(link));
2282         rte_eth_linkstatus_set(dev, &link);
2283 out_unlock:
2284         rte_spinlock_unlock(&hw->state_lock);
2285 }
2286
2287 static int
2288 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2289 {
2290         struct rte_eth_link link;
2291         uint16_t status;
2292         struct virtio_hw *hw = dev->data->dev_private;
2293
2294         memset(&link, 0, sizeof(link));
2295         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2296         link.link_speed  = ETH_SPEED_NUM_10G;
2297         link.link_autoneg = ETH_LINK_FIXED;
2298
2299         if (!hw->started) {
2300                 link.link_status = ETH_LINK_DOWN;
2301         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2302                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2303                 vtpci_read_dev_config(hw,
2304                                 offsetof(struct virtio_net_config, status),
2305                                 &status, sizeof(status));
2306                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2307                         link.link_status = ETH_LINK_DOWN;
2308                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2309                                      dev->data->port_id);
2310                 } else {
2311                         link.link_status = ETH_LINK_UP;
2312                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2313                                      dev->data->port_id);
2314                 }
2315         } else {
2316                 link.link_status = ETH_LINK_UP;
2317         }
2318
2319         return rte_eth_linkstatus_set(dev, &link);
2320 }
2321
2322 static int
2323 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2324 {
2325         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2326         struct virtio_hw *hw = dev->data->dev_private;
2327         uint64_t offloads = rxmode->offloads;
2328
2329         if (mask & ETH_VLAN_FILTER_MASK) {
2330                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2331                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2332
2333                         PMD_DRV_LOG(NOTICE,
2334                                 "vlan filtering not available on this host");
2335
2336                         return -ENOTSUP;
2337                 }
2338         }
2339
2340         if (mask & ETH_VLAN_STRIP_MASK)
2341                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2342
2343         return 0;
2344 }
2345
2346 static void
2347 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2348 {
2349         uint64_t tso_mask, host_features;
2350         struct virtio_hw *hw = dev->data->dev_private;
2351
2352         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2353
2354         dev_info->max_rx_queues =
2355                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2356         dev_info->max_tx_queues =
2357                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2358         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2359         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2360         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2361
2362         host_features = VTPCI_OPS(hw)->get_features(hw);
2363         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2364         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2365         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2366                 dev_info->rx_offload_capa |=
2367                         DEV_RX_OFFLOAD_TCP_CKSUM |
2368                         DEV_RX_OFFLOAD_UDP_CKSUM;
2369         }
2370         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2371                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2372         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2373                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2374         if ((host_features & tso_mask) == tso_mask)
2375                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2376
2377         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2378                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2379         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2380                 dev_info->tx_offload_capa |=
2381                         DEV_TX_OFFLOAD_UDP_CKSUM |
2382                         DEV_TX_OFFLOAD_TCP_CKSUM;
2383         }
2384         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2385                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2386         if ((host_features & tso_mask) == tso_mask)
2387                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2388 }
2389
2390 /*
2391  * It enables testpmd to collect per queue stats.
2392  */
2393 static int
2394 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2395 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2396 __rte_unused uint8_t is_rx)
2397 {
2398         return 0;
2399 }
2400
2401 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2402 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2403 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2404
2405 RTE_INIT(virtio_init_log)
2406 {
2407         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2408         if (virtio_logtype_init >= 0)
2409                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2410         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2411         if (virtio_logtype_driver >= 0)
2412                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2413 }