drivers/net/virtio/virtio_ethdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <string.h>
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <unistd.h>
  10
  11 #include <rte_ethdev_driver.h>
  12 #include <rte_ethdev_pci.h>
  13 #include <rte_memcpy.h>
  14 #include <rte_string_fns.h>
  15 #include <rte_memzone.h>
  16 #include <rte_malloc.h>
  17 #include <rte_branch_prediction.h>
  18 #include <rte_pci.h>
  19 #include <rte_bus_pci.h>
  20 #include <rte_ether.h>
  21 #include <rte_ip.h>
  22 #include <rte_arp.h>
  23 #include <rte_common.h>
  24 #include <rte_errno.h>
  25 #include <rte_cpuflags.h>
  26
  27 #include <rte_memory.h>
  28 #include <rte_eal.h>
  29 #include <rte_dev.h>
  30 #include <rte_cycles.h>
  31 #include <rte_kvargs.h>
  32
  33 #include "virtio_ethdev.h"
  34 #include "virtio_pci.h"
  35 #include "virtio_logs.h"
  36 #include "virtqueue.h"
  37 #include "virtio_rxtx.h"
  38 #include "virtio_user/virtio_user_dev.h"
  39
  40 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  41 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  42 static int  virtio_dev_start(struct rte_eth_dev *dev);
  43 static void virtio_dev_stop(struct rte_eth_dev *dev);
  44 static int virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  45 static int virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  46 static int virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  47 static int virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  48 static int virtio_dev_info_get(struct rte_eth_dev *dev,
  49                                 struct rte_eth_dev_info *dev_info);
  50 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  51         int wait_to_complete);
  52 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  53
  54 static void virtio_set_hwaddr(struct virtio_hw *hw);
  55 static void virtio_get_hwaddr(struct virtio_hw *hw);
  56
  57 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  58                                  struct rte_eth_stats *stats);
  59 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  60                                  struct rte_eth_xstat *xstats, unsigned n);
  61 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  62                                        struct rte_eth_xstat_name *xstats_names,
  63                                        unsigned limit);
  64 static int virtio_dev_stats_reset(struct rte_eth_dev *dev);
  65 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  66 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  67                                 uint16_t vlan_id, int on);
  68 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  69                                 struct rte_ether_addr *mac_addr,
  70                                 uint32_t index, uint32_t vmdq);
  71 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  72 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
  73                                 struct rte_ether_addr *mac_addr);
  74
  75 static int virtio_intr_disable(struct rte_eth_dev *dev);
  76
  77 static int virtio_dev_queue_stats_mapping_set(
  78         struct rte_eth_dev *eth_dev,
  79         uint16_t queue_id,
  80         uint8_t stat_idx,
  81         uint8_t is_rx);
  82
  83 int virtio_logtype_init;
  84 int virtio_logtype_driver;
  85
  86 static void virtio_notify_peers(struct rte_eth_dev *dev);
  87 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  88
  89 /*
  90  * The set of PCI devices this driver supports
  91  */
  92 static const struct rte_pci_id pci_id_virtio_map[] = {
  93         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  94         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  95         { .vendor_id = 0, /* sentinel */ },
  96 };
  97
  98 struct rte_virtio_xstats_name_off {
  99         char name[RTE_ETH_XSTATS_NAME_SIZE];
 100         unsigned offset;
 101 };
 102
 103 /* [rt]x_qX_ is prepended to the name string here */
 104 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 105         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 106         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 107         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 108         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 109         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 110         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 111         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 112         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 113         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 114         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 115         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 116         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 117         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 118 };
 119
 120 /* [rt]x_qX_ is prepended to the name string here */
 121 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 122         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 123         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 124         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 125         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 126         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 127         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 128         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 129         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 130         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 131         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 132         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 133         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 134 };
 135
 136 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 137                             sizeof(rte_virtio_rxq_stat_strings[0]))
 138 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 139                             sizeof(rte_virtio_txq_stat_strings[0]))
 140
 141 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 142
 143 static struct virtio_pmd_ctrl *
 144 virtio_send_command_packed(struct virtnet_ctl *cvq,
 145                            struct virtio_pmd_ctrl *ctrl,
 146                            int *dlen, int pkt_num)
 147 {
 148         struct virtqueue *vq = cvq->vq;
 149         int head;
 150         struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
 151         struct virtio_pmd_ctrl *result;
 152         uint16_t flags;
 153         int sum = 0;
 154         int nb_descs = 0;
 155         int k;
 156
 157         /*
 158          * Format is enforced in qemu code:
 159          * One TX packet for header;
 160          * At least one TX packet per argument;
 161          * One RX packet for ACK.
 162          */
 163         head = vq->vq_avail_idx;
 164         flags = vq->vq_packed.cached_flags;
 165         desc[head].addr = cvq->virtio_net_hdr_mem;
 166         desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 167         vq->vq_free_cnt--;
 168         nb_descs++;
 169         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 170                 vq->vq_avail_idx -= vq->vq_nentries;
 171                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 172         }
 173
 174         for (k = 0; k < pkt_num; k++) {
 175                 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 176                         + sizeof(struct virtio_net_ctrl_hdr)
 177                         + sizeof(ctrl->status) + sizeof(uint8_t) * sum;
 178                 desc[vq->vq_avail_idx].len = dlen[k];
 179                 desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
 180                         vq->vq_packed.cached_flags;
 181                 sum += dlen[k];
 182                 vq->vq_free_cnt--;
 183                 nb_descs++;
 184                 if (++vq->vq_avail_idx >= vq->vq_nentries) {
 185                         vq->vq_avail_idx -= vq->vq_nentries;
 186                         vq->vq_packed.cached_flags ^=
 187                                 VRING_PACKED_DESC_F_AVAIL_USED;
 188                 }
 189         }
 190
 191         desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 192                 + sizeof(struct virtio_net_ctrl_hdr);
 193         desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
 194         desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
 195                 vq->vq_packed.cached_flags;
 196         vq->vq_free_cnt--;
 197         nb_descs++;
 198         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 199                 vq->vq_avail_idx -= vq->vq_nentries;
 200                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 201         }
 202
 203         virtio_wmb(vq->hw->weak_barriers);
 204         desc[head].flags = VRING_DESC_F_NEXT | flags;
 205
 206         virtio_wmb(vq->hw->weak_barriers);
 207         virtqueue_notify(vq);
 208
 209         /* wait for used descriptors in virtqueue */
 210         while (!desc_is_used(&desc[head], vq))
 211                 usleep(100);
 212
 213         virtio_rmb(vq->hw->weak_barriers);
 214
 215         /* now get used descriptors */
 216         vq->vq_free_cnt += nb_descs;
 217         vq->vq_used_cons_idx += nb_descs;
 218         if (vq->vq_used_cons_idx >= vq->vq_nentries) {
 219                 vq->vq_used_cons_idx -= vq->vq_nentries;
 220                 vq->vq_packed.used_wrap_counter ^= 1;
 221         }
 222
 223         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
 224                         "vq->vq_avail_idx=%d\n"
 225                         "vq->vq_used_cons_idx=%d\n"
 226                         "vq->vq_packed.cached_flags=0x%x\n"
 227                         "vq->vq_packed.used_wrap_counter=%d\n",
 228                         vq->vq_free_cnt,
 229                         vq->vq_avail_idx,
 230                         vq->vq_used_cons_idx,
 231                         vq->vq_packed.cached_flags,
 232                         vq->vq_packed.used_wrap_counter);
 233
 234         result = cvq->virtio_net_hdr_mz->addr;
 235         return result;
 236 }
 237
 238 static struct virtio_pmd_ctrl *
 239 virtio_send_command_split(struct virtnet_ctl *cvq,
 240                           struct virtio_pmd_ctrl *ctrl,
 241                           int *dlen, int pkt_num)
 242 {
 243         struct virtio_pmd_ctrl *result;
 244         struct virtqueue *vq = cvq->vq;
 245         uint32_t head, i;
 246         int k, sum = 0;
 247
 248         head = vq->vq_desc_head_idx;
 249
 250         /*
 251          * Format is enforced in qemu code:
 252          * One TX packet for header;
 253          * At least one TX packet per argument;
 254          * One RX packet for ACK.
 255          */
 256         vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
 257         vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 258         vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 259         vq->vq_free_cnt--;
 260         i = vq->vq_split.ring.desc[head].next;
 261
 262         for (k = 0; k < pkt_num; k++) {
 263                 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
 264                 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 265                         + sizeof(struct virtio_net_ctrl_hdr)
 266                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 267                 vq->vq_split.ring.desc[i].len = dlen[k];
 268                 sum += dlen[k];
 269                 vq->vq_free_cnt--;
 270                 i = vq->vq_split.ring.desc[i].next;
 271         }
 272
 273         vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
 274         vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 275                         + sizeof(struct virtio_net_ctrl_hdr);
 276         vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
 277         vq->vq_free_cnt--;
 278
 279         vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
 280
 281         vq_update_avail_ring(vq, head);
 282         vq_update_avail_idx(vq);
 283
 284         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 285
 286         virtqueue_notify(vq);
 287
 288         rte_rmb();
 289         while (VIRTQUEUE_NUSED(vq) == 0) {
 290                 rte_rmb();
 291                 usleep(100);
 292         }
 293
 294         while (VIRTQUEUE_NUSED(vq)) {
 295                 uint32_t idx, desc_idx, used_idx;
 296                 struct vring_used_elem *uep;
 297
 298                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 299                                 & (vq->vq_nentries - 1));
 300                 uep = &vq->vq_split.ring.used->ring[used_idx];
 301                 idx = (uint32_t) uep->id;
 302                 desc_idx = idx;
 303
 304                 while (vq->vq_split.ring.desc[desc_idx].flags &
 305                                 VRING_DESC_F_NEXT) {
 306                         desc_idx = vq->vq_split.ring.desc[desc_idx].next;
 307                         vq->vq_free_cnt++;
 308                 }
 309
 310                 vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 311                 vq->vq_desc_head_idx = idx;
 312
 313                 vq->vq_used_cons_idx++;
 314                 vq->vq_free_cnt++;
 315         }
 316
 317         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 318                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 319
 320         result = cvq->virtio_net_hdr_mz->addr;
 321         return result;
 322 }
 323
 324 static int
 325 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 326                     int *dlen, int pkt_num)
 327 {
 328         virtio_net_ctrl_ack status = ~0;
 329         struct virtio_pmd_ctrl *result;
 330         struct virtqueue *vq;
 331
 332         ctrl->status = status;
 333
 334         if (!cvq || !cvq->vq) {
 335                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 336                 return -1;
 337         }
 338
 339         rte_spinlock_lock(&cvq->lock);
 340         vq = cvq->vq;
 341
 342         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 343                 "vq->hw->cvq = %p vq = %p",
 344                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 345
 346         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 347                 rte_spinlock_unlock(&cvq->lock);
 348                 return -1;
 349         }
 350
 351         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 352                 sizeof(struct virtio_pmd_ctrl));
 353
 354         if (vtpci_packed_queue(vq->hw))
 355                 result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
 356         else
 357                 result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
 358
 359         rte_spinlock_unlock(&cvq->lock);
 360         return result->status;
 361 }
 362
 363 static int
 364 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 365 {
 366         struct virtio_hw *hw = dev->data->dev_private;
 367         struct virtio_pmd_ctrl ctrl;
 368         int dlen[1];
 369         int ret;
 370
 371         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 372         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 373         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 374
 375         dlen[0] = sizeof(uint16_t);
 376
 377         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 378         if (ret) {
 379                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 380                           "failed, this is too late now...");
 381                 return -EINVAL;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static void
 388 virtio_dev_queue_release(void *queue __rte_unused)
 389 {
 390         /* do nothing */
 391 }
 392
 393 static uint16_t
 394 virtio_get_nr_vq(struct virtio_hw *hw)
 395 {
 396         uint16_t nr_vq = hw->max_queue_pairs * 2;
 397
 398         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 399                 nr_vq += 1;
 400
 401         return nr_vq;
 402 }
 403
 404 static void
 405 virtio_init_vring(struct virtqueue *vq)
 406 {
 407         int size = vq->vq_nentries;
 408         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 409
 410         PMD_INIT_FUNC_TRACE();
 411
 412         memset(ring_mem, 0, vq->vq_ring_size);
 413
 414         vq->vq_used_cons_idx = 0;
 415         vq->vq_desc_head_idx = 0;
 416         vq->vq_avail_idx = 0;
 417         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 418         vq->vq_free_cnt = vq->vq_nentries;
 419         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 420         if (vtpci_packed_queue(vq->hw)) {
 421                 vring_init_packed(&vq->vq_packed.ring, ring_mem,
 422                                   VIRTIO_PCI_VRING_ALIGN, size);
 423                 vring_desc_init_packed(vq, size);
 424         } else {
 425                 struct vring *vr = &vq->vq_split.ring;
 426
 427                 vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size);
 428                 vring_desc_init_split(vr->desc, size);
 429         }
 430         /*
 431          * Disable device(host) interrupting guest
 432          */
 433         virtqueue_disable_intr(vq);
 434 }
 435
 436 static int
 437 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 438 {
 439         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 440         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 441         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 442         unsigned int vq_size, size;
 443         struct virtio_hw *hw = dev->data->dev_private;
 444         struct virtnet_rx *rxvq = NULL;
 445         struct virtnet_tx *txvq = NULL;
 446         struct virtnet_ctl *cvq = NULL;
 447         struct virtqueue *vq;
 448         size_t sz_hdr_mz = 0;
 449         void *sw_ring = NULL;
 450         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 451         int ret;
 452         int numa_node = dev->device->numa_node;
 453
 454         PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
 455                         vtpci_queue_idx, numa_node);
 456
 457         /*
 458          * Read the virtqueue size from the Queue Size field
 459          * Always power of 2 and if 0 virtqueue does not exist
 460          */
 461         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 462         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 463         if (vq_size == 0) {
 464                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 465                 return -EINVAL;
 466         }
 467
 468         if (!vtpci_packed_queue(hw) && !rte_is_power_of_2(vq_size)) {
 469                 PMD_INIT_LOG(ERR, "split virtqueue size is not powerof 2");
 470                 return -EINVAL;
 471         }
 472
 473         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 474                  dev->data->port_id, vtpci_queue_idx);
 475
 476         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 477                                 vq_size * sizeof(struct vq_desc_extra),
 478                                 RTE_CACHE_LINE_SIZE);
 479         if (queue_type == VTNET_TQ) {
 480                 /*
 481                  * For each xmit packet, allocate a virtio_net_hdr
 482                  * and indirect ring elements
 483                  */
 484                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 485         } else if (queue_type == VTNET_CQ) {
 486                 /* Allocate a page for control vq command, data and status */
 487                 sz_hdr_mz = PAGE_SIZE;
 488         }
 489
 490         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 491                                 numa_node);
 492         if (vq == NULL) {
 493                 PMD_INIT_LOG(ERR, "can not allocate vq");
 494                 return -ENOMEM;
 495         }
 496         hw->vqs[vtpci_queue_idx] = vq;
 497
 498         vq->hw = hw;
 499         vq->vq_queue_index = vtpci_queue_idx;
 500         vq->vq_nentries = vq_size;
 501         if (vtpci_packed_queue(hw)) {
 502                 vq->vq_packed.used_wrap_counter = 1;
 503                 vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
 504                 vq->vq_packed.event_flags_shadow = 0;
 505                 if (queue_type == VTNET_RQ)
 506                         vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
 507         }
 508
 509         /*
 510          * Reserve a memzone for vring elements
 511          */
 512         size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN);
 513         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 514         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 515                      size, vq->vq_ring_size);
 516
 517         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 518                         numa_node, RTE_MEMZONE_IOVA_CONTIG,
 519                         VIRTIO_PCI_VRING_ALIGN);
 520         if (mz == NULL) {
 521                 if (rte_errno == EEXIST)
 522                         mz = rte_memzone_lookup(vq_name);
 523                 if (mz == NULL) {
 524                         ret = -ENOMEM;
 525                         goto fail_q_alloc;
 526                 }
 527         }
 528
 529         memset(mz->addr, 0, mz->len);
 530
 531         vq->vq_ring_mem = mz->iova;
 532         vq->vq_ring_virt_mem = mz->addr;
 533         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 534                      (uint64_t)mz->iova);
 535         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 536                      (uint64_t)(uintptr_t)mz->addr);
 537
 538         virtio_init_vring(vq);
 539
 540         if (sz_hdr_mz) {
 541                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 542                          dev->data->port_id, vtpci_queue_idx);
 543                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 544                                 numa_node, RTE_MEMZONE_IOVA_CONTIG,
 545                                 RTE_CACHE_LINE_SIZE);
 546                 if (hdr_mz == NULL) {
 547                         if (rte_errno == EEXIST)
 548                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 549                         if (hdr_mz == NULL) {
 550                                 ret = -ENOMEM;
 551                                 goto fail_q_alloc;
 552                         }
 553                 }
 554         }
 555
 556         if (queue_type == VTNET_RQ) {
 557                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 558                                sizeof(vq->sw_ring[0]);
 559
 560                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 561                                 RTE_CACHE_LINE_SIZE, numa_node);
 562                 if (!sw_ring) {
 563                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 564                         ret = -ENOMEM;
 565                         goto fail_q_alloc;
 566                 }
 567
 568                 vq->sw_ring = sw_ring;
 569                 rxvq = &vq->rxq;
 570                 rxvq->vq = vq;
 571                 rxvq->port_id = dev->data->port_id;
 572                 rxvq->mz = mz;
 573         } else if (queue_type == VTNET_TQ) {
 574                 txvq = &vq->txq;
 575                 txvq->vq = vq;
 576                 txvq->port_id = dev->data->port_id;
 577                 txvq->mz = mz;
 578                 txvq->virtio_net_hdr_mz = hdr_mz;
 579                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 580         } else if (queue_type == VTNET_CQ) {
 581                 cvq = &vq->cq;
 582                 cvq->vq = vq;
 583                 cvq->mz = mz;
 584                 cvq->virtio_net_hdr_mz = hdr_mz;
 585                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 586                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 587
 588                 hw->cvq = cvq;
 589         }
 590
 591         /* For virtio_user case (that is when hw->dev is NULL), we use
 592          * virtual address. And we need properly set _offset_, please see
 593          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 594          */
 595         if (!hw->virtio_user_dev)
 596                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 597         else {
 598                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 599                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 600                 if (queue_type == VTNET_TQ)
 601                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 602                 else if (queue_type == VTNET_CQ)
 603                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 604         }
 605
 606         if (queue_type == VTNET_TQ) {
 607                 struct virtio_tx_region *txr;
 608                 unsigned int i;
 609
 610                 txr = hdr_mz->addr;
 611                 memset(txr, 0, vq_size * sizeof(*txr));
 612                 for (i = 0; i < vq_size; i++) {
 613                         struct vring_desc *start_dp = txr[i].tx_indir;
 614
 615                         /* first indirect descriptor is always the tx header */
 616                         if (!vtpci_packed_queue(hw)) {
 617                                 vring_desc_init_split(start_dp,
 618                                                       RTE_DIM(txr[i].tx_indir));
 619                                 start_dp->addr = txvq->virtio_net_hdr_mem
 620                                         + i * sizeof(*txr)
 621                                         + offsetof(struct virtio_tx_region,
 622                                                    tx_hdr);
 623                                 start_dp->len = hw->vtnet_hdr_size;
 624                                 start_dp->flags = VRING_DESC_F_NEXT;
 625                         }
 626                 }
 627         }
 628
 629         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 630                 PMD_INIT_LOG(ERR, "setup_queue failed");
 631                 return -EINVAL;
 632         }
 633
 634         return 0;
 635
 636 fail_q_alloc:
 637         rte_free(sw_ring);
 638         rte_memzone_free(hdr_mz);
 639         rte_memzone_free(mz);
 640         rte_free(vq);
 641
 642         return ret;
 643 }
 644
 645 static void
 646 virtio_free_queues(struct virtio_hw *hw)
 647 {
 648         uint16_t nr_vq = virtio_get_nr_vq(hw);
 649         struct virtqueue *vq;
 650         int queue_type;
 651         uint16_t i;
 652
 653         if (hw->vqs == NULL)
 654                 return;
 655
 656         for (i = 0; i < nr_vq; i++) {
 657                 vq = hw->vqs[i];
 658                 if (!vq)
 659                         continue;
 660
 661                 queue_type = virtio_get_queue_type(hw, i);
 662                 if (queue_type == VTNET_RQ) {
 663                         rte_free(vq->sw_ring);
 664                         rte_memzone_free(vq->rxq.mz);
 665                 } else if (queue_type == VTNET_TQ) {
 666                         rte_memzone_free(vq->txq.mz);
 667                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 668                 } else {
 669                         rte_memzone_free(vq->cq.mz);
 670                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 671                 }
 672
 673                 rte_free(vq);
 674                 hw->vqs[i] = NULL;
 675         }
 676
 677         rte_free(hw->vqs);
 678         hw->vqs = NULL;
 679 }
 680
 681 static int
 682 virtio_alloc_queues(struct rte_eth_dev *dev)
 683 {
 684         struct virtio_hw *hw = dev->data->dev_private;
 685         uint16_t nr_vq = virtio_get_nr_vq(hw);
 686         uint16_t i;
 687         int ret;
 688
 689         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 690         if (!hw->vqs) {
 691                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 692                 return -ENOMEM;
 693         }
 694
 695         for (i = 0; i < nr_vq; i++) {
 696                 ret = virtio_init_queue(dev, i);
 697                 if (ret < 0) {
 698                         virtio_free_queues(hw);
 699                         return ret;
 700                 }
 701         }
 702
 703         return 0;
 704 }
 705
 706 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 707
 708 static void
 709 virtio_dev_close(struct rte_eth_dev *dev)
 710 {
 711         struct virtio_hw *hw = dev->data->dev_private;
 712         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 713
 714         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 715
 716         if (!hw->opened)
 717                 return;
 718         hw->opened = false;
 719
 720         /* reset the NIC */
 721         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 722                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 723         if (intr_conf->rxq)
 724                 virtio_queues_unbind_intr(dev);
 725
 726         if (intr_conf->lsc || intr_conf->rxq) {
 727                 virtio_intr_disable(dev);
 728                 rte_intr_efd_disable(dev->intr_handle);
 729                 rte_free(dev->intr_handle->intr_vec);
 730                 dev->intr_handle->intr_vec = NULL;
 731         }
 732
 733         vtpci_reset(hw);
 734         virtio_dev_free_mbufs(dev);
 735         virtio_free_queues(hw);
 736
 737 #ifdef RTE_VIRTIO_USER
 738         if (hw->virtio_user_dev)
 739                 virtio_user_dev_uninit(hw->virtio_user_dev);
 740         else
 741 #endif
 742         if (dev->device) {
 743                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(dev));
 744                 if (!hw->modern)
 745                         rte_pci_ioport_unmap(VTPCI_IO(hw));
 746         }
 747 }
 748
 749 static int
 750 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 751 {
 752         struct virtio_hw *hw = dev->data->dev_private;
 753         struct virtio_pmd_ctrl ctrl;
 754         int dlen[1];
 755         int ret;
 756
 757         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 758                 PMD_INIT_LOG(INFO, "host does not support rx control");
 759                 return -ENOTSUP;
 760         }
 761
 762         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 763         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 764         ctrl.data[0] = 1;
 765         dlen[0] = 1;
 766
 767         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 768         if (ret) {
 769                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 770                 return -EAGAIN;
 771         }
 772
 773         return 0;
 774 }
 775
 776 static int
 777 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 778 {
 779         struct virtio_hw *hw = dev->data->dev_private;
 780         struct virtio_pmd_ctrl ctrl;
 781         int dlen[1];
 782         int ret;
 783
 784         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 785                 PMD_INIT_LOG(INFO, "host does not support rx control");
 786                 return -ENOTSUP;
 787         }
 788
 789         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 790         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 791         ctrl.data[0] = 0;
 792         dlen[0] = 1;
 793
 794         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 795         if (ret) {
 796                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 797                 return -EAGAIN;
 798         }
 799
 800         return 0;
 801 }
 802
 803 static int
 804 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 805 {
 806         struct virtio_hw *hw = dev->data->dev_private;
 807         struct virtio_pmd_ctrl ctrl;
 808         int dlen[1];
 809         int ret;
 810
 811         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 812                 PMD_INIT_LOG(INFO, "host does not support rx control");
 813                 return -ENOTSUP;
 814         }
 815
 816         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 817         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 818         ctrl.data[0] = 1;
 819         dlen[0] = 1;
 820
 821         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 822         if (ret) {
 823                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 824                 return -EAGAIN;
 825         }
 826
 827         return 0;
 828 }
 829
 830 static int
 831 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 832 {
 833         struct virtio_hw *hw = dev->data->dev_private;
 834         struct virtio_pmd_ctrl ctrl;
 835         int dlen[1];
 836         int ret;
 837
 838         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 839                 PMD_INIT_LOG(INFO, "host does not support rx control");
 840                 return -ENOTSUP;
 841         }
 842
 843         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 844         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 845         ctrl.data[0] = 0;
 846         dlen[0] = 1;
 847
 848         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 849         if (ret) {
 850                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 851                 return -EAGAIN;
 852         }
 853
 854         return 0;
 855 }
 856
 857 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 858 static int
 859 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 860 {
 861         struct virtio_hw *hw = dev->data->dev_private;
 862         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 863                                  hw->vtnet_hdr_size;
 864         uint32_t frame_size = mtu + ether_hdr_len;
 865         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 866
 867         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 868
 869         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 870                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 871                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 872                 return -EINVAL;
 873         }
 874         return 0;
 875 }
 876
 877 static int
 878 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 879 {
 880         struct virtio_hw *hw = dev->data->dev_private;
 881         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 882         struct virtqueue *vq = rxvq->vq;
 883
 884         virtqueue_enable_intr(vq);
 885         virtio_mb(hw->weak_barriers);
 886         return 0;
 887 }
 888
 889 static int
 890 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 891 {
 892         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 893         struct virtqueue *vq = rxvq->vq;
 894
 895         virtqueue_disable_intr(vq);
 896         return 0;
 897 }
 898
 899 /*
 900  * dev_ops for virtio, bare necessities for basic operation
 901  */
 902 static const struct eth_dev_ops virtio_eth_dev_ops = {
 903         .dev_configure           = virtio_dev_configure,
 904         .dev_start               = virtio_dev_start,
 905         .dev_stop                = virtio_dev_stop,
 906         .dev_close               = virtio_dev_close,
 907         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 908         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 909         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 910         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 911         .mtu_set                 = virtio_mtu_set,
 912         .dev_infos_get           = virtio_dev_info_get,
 913         .stats_get               = virtio_dev_stats_get,
 914         .xstats_get              = virtio_dev_xstats_get,
 915         .xstats_get_names        = virtio_dev_xstats_get_names,
 916         .stats_reset             = virtio_dev_stats_reset,
 917         .xstats_reset            = virtio_dev_stats_reset,
 918         .link_update             = virtio_dev_link_update,
 919         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 920         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 921         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 922         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 923         .rx_queue_release        = virtio_dev_queue_release,
 924         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 925         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 926         .tx_queue_release        = virtio_dev_queue_release,
 927         /* collect stats per queue */
 928         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 929         .vlan_filter_set         = virtio_vlan_filter_set,
 930         .mac_addr_add            = virtio_mac_addr_add,
 931         .mac_addr_remove         = virtio_mac_addr_remove,
 932         .mac_addr_set            = virtio_mac_addr_set,
 933 };
 934
 935 /*
 936  * dev_ops for virtio-user in secondary processes, as we just have
 937  * some limited supports currently.
 938  */
 939 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 940         .dev_infos_get           = virtio_dev_info_get,
 941         .stats_get               = virtio_dev_stats_get,
 942         .xstats_get              = virtio_dev_xstats_get,
 943         .xstats_get_names        = virtio_dev_xstats_get_names,
 944         .stats_reset             = virtio_dev_stats_reset,
 945         .xstats_reset            = virtio_dev_stats_reset,
 946         /* collect stats per queue */
 947         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 948 };
 949
 950 static void
 951 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 952 {
 953         unsigned i;
 954
 955         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 956                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 957                 if (txvq == NULL)
 958                         continue;
 959
 960                 stats->opackets += txvq->stats.packets;
 961                 stats->obytes += txvq->stats.bytes;
 962
 963                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 964                         stats->q_opackets[i] = txvq->stats.packets;
 965                         stats->q_obytes[i] = txvq->stats.bytes;
 966                 }
 967         }
 968
 969         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 970                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 971                 if (rxvq == NULL)
 972                         continue;
 973
 974                 stats->ipackets += rxvq->stats.packets;
 975                 stats->ibytes += rxvq->stats.bytes;
 976                 stats->ierrors += rxvq->stats.errors;
 977
 978                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 979                         stats->q_ipackets[i] = rxvq->stats.packets;
 980                         stats->q_ibytes[i] = rxvq->stats.bytes;
 981                 }
 982         }
 983
 984         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 985 }
 986
 987 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 988                                        struct rte_eth_xstat_name *xstats_names,
 989                                        __rte_unused unsigned limit)
 990 {
 991         unsigned i;
 992         unsigned count = 0;
 993         unsigned t;
 994
 995         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 996                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 997
 998         if (xstats_names != NULL) {
 999                 /* Note: limit checked in rte_eth_xstats_names() */
1000
1001                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1002                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1003                         if (rxvq == NULL)
1004                                 continue;
1005                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1006                                 snprintf(xstats_names[count].name,
1007                                         sizeof(xstats_names[count].name),
1008                                         "rx_q%u_%s", i,
1009                                         rte_virtio_rxq_stat_strings[t].name);
1010                                 count++;
1011                         }
1012                 }
1013
1014                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1015                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1016                         if (txvq == NULL)
1017                                 continue;
1018                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1019                                 snprintf(xstats_names[count].name,
1020                                         sizeof(xstats_names[count].name),
1021                                         "tx_q%u_%s", i,
1022                                         rte_virtio_txq_stat_strings[t].name);
1023                                 count++;
1024                         }
1025                 }
1026                 return count;
1027         }
1028         return nstats;
1029 }
1030
1031 static int
1032 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1033                       unsigned n)
1034 {
1035         unsigned i;
1036         unsigned count = 0;
1037
1038         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1039                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1040
1041         if (n < nstats)
1042                 return nstats;
1043
1044         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1045                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1046
1047                 if (rxvq == NULL)
1048                         continue;
1049
1050                 unsigned t;
1051
1052                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1053                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1054                                 rte_virtio_rxq_stat_strings[t].offset);
1055                         xstats[count].id = count;
1056                         count++;
1057                 }
1058         }
1059
1060         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1061                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1062
1063                 if (txvq == NULL)
1064                         continue;
1065
1066                 unsigned t;
1067
1068                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1069                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1070                                 rte_virtio_txq_stat_strings[t].offset);
1071                         xstats[count].id = count;
1072                         count++;
1073                 }
1074         }
1075
1076         return count;
1077 }
1078
1079 static int
1080 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1081 {
1082         virtio_update_stats(dev, stats);
1083
1084         return 0;
1085 }
1086
1087 static int
1088 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1089 {
1090         unsigned int i;
1091
1092         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1093                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1094                 if (txvq == NULL)
1095                         continue;
1096
1097                 txvq->stats.packets = 0;
1098                 txvq->stats.bytes = 0;
1099                 txvq->stats.multicast = 0;
1100                 txvq->stats.broadcast = 0;
1101                 memset(txvq->stats.size_bins, 0,
1102                        sizeof(txvq->stats.size_bins[0]) * 8);
1103         }
1104
1105         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1106                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1107                 if (rxvq == NULL)
1108                         continue;
1109
1110                 rxvq->stats.packets = 0;
1111                 rxvq->stats.bytes = 0;
1112                 rxvq->stats.errors = 0;
1113                 rxvq->stats.multicast = 0;
1114                 rxvq->stats.broadcast = 0;
1115                 memset(rxvq->stats.size_bins, 0,
1116                        sizeof(rxvq->stats.size_bins[0]) * 8);
1117         }
1118
1119         return 0;
1120 }
1121
1122 static void
1123 virtio_set_hwaddr(struct virtio_hw *hw)
1124 {
1125         vtpci_write_dev_config(hw,
1126                         offsetof(struct virtio_net_config, mac),
1127                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1128 }
1129
1130 static void
1131 virtio_get_hwaddr(struct virtio_hw *hw)
1132 {
1133         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1134                 vtpci_read_dev_config(hw,
1135                         offsetof(struct virtio_net_config, mac),
1136                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1137         } else {
1138                 rte_eth_random_addr(&hw->mac_addr[0]);
1139                 virtio_set_hwaddr(hw);
1140         }
1141 }
1142
1143 static int
1144 virtio_mac_table_set(struct virtio_hw *hw,
1145                      const struct virtio_net_ctrl_mac *uc,
1146                      const struct virtio_net_ctrl_mac *mc)
1147 {
1148         struct virtio_pmd_ctrl ctrl;
1149         int err, len[2];
1150
1151         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1152                 PMD_DRV_LOG(INFO, "host does not support mac table");
1153                 return -1;
1154         }
1155
1156         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1157         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1158
1159         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1160         memcpy(ctrl.data, uc, len[0]);
1161
1162         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1163         memcpy(ctrl.data + len[0], mc, len[1]);
1164
1165         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1166         if (err != 0)
1167                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1168         return err;
1169 }
1170
1171 static int
1172 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1173                     uint32_t index, uint32_t vmdq __rte_unused)
1174 {
1175         struct virtio_hw *hw = dev->data->dev_private;
1176         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1177         unsigned int i;
1178         struct virtio_net_ctrl_mac *uc, *mc;
1179
1180         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1181                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1182                 return -EINVAL;
1183         }
1184
1185         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1186                 sizeof(uc->entries));
1187         uc->entries = 0;
1188         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1189                 sizeof(mc->entries));
1190         mc->entries = 0;
1191
1192         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1193                 const struct rte_ether_addr *addr
1194                         = (i == index) ? mac_addr : addrs + i;
1195                 struct virtio_net_ctrl_mac *tbl
1196                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1197
1198                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1199         }
1200
1201         return virtio_mac_table_set(hw, uc, mc);
1202 }
1203
1204 static void
1205 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1206 {
1207         struct virtio_hw *hw = dev->data->dev_private;
1208         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1209         struct virtio_net_ctrl_mac *uc, *mc;
1210         unsigned int i;
1211
1212         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1213                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1214                 return;
1215         }
1216
1217         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1218                 sizeof(uc->entries));
1219         uc->entries = 0;
1220         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1221                 sizeof(mc->entries));
1222         mc->entries = 0;
1223
1224         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1225                 struct virtio_net_ctrl_mac *tbl;
1226
1227                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1228                         continue;
1229
1230                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1231                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1232                         RTE_ETHER_ADDR_LEN);
1233         }
1234
1235         virtio_mac_table_set(hw, uc, mc);
1236 }
1237
1238 static int
1239 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1240 {
1241         struct virtio_hw *hw = dev->data->dev_private;
1242
1243         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1244
1245         /* Use atomic update if available */
1246         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1247                 struct virtio_pmd_ctrl ctrl;
1248                 int len = RTE_ETHER_ADDR_LEN;
1249
1250                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1251                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1252
1253                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1254                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1255         }
1256
1257         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1258                 return -ENOTSUP;
1259
1260         virtio_set_hwaddr(hw);
1261         return 0;
1262 }
1263
1264 static int
1265 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1266 {
1267         struct virtio_hw *hw = dev->data->dev_private;
1268         struct virtio_pmd_ctrl ctrl;
1269         int len;
1270
1271         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1272                 return -ENOTSUP;
1273
1274         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1275         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1276         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1277         len = sizeof(vlan_id);
1278
1279         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1280 }
1281
1282 static int
1283 virtio_intr_unmask(struct rte_eth_dev *dev)
1284 {
1285         struct virtio_hw *hw = dev->data->dev_private;
1286
1287         if (rte_intr_ack(dev->intr_handle) < 0)
1288                 return -1;
1289
1290         if (!hw->virtio_user_dev)
1291                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1292
1293         return 0;
1294 }
1295
1296 static int
1297 virtio_intr_enable(struct rte_eth_dev *dev)
1298 {
1299         struct virtio_hw *hw = dev->data->dev_private;
1300
1301         if (rte_intr_enable(dev->intr_handle) < 0)
1302                 return -1;
1303
1304         if (!hw->virtio_user_dev)
1305                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1306
1307         return 0;
1308 }
1309
1310 static int
1311 virtio_intr_disable(struct rte_eth_dev *dev)
1312 {
1313         struct virtio_hw *hw = dev->data->dev_private;
1314
1315         if (rte_intr_disable(dev->intr_handle) < 0)
1316                 return -1;
1317
1318         if (!hw->virtio_user_dev)
1319                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1320
1321         return 0;
1322 }
1323
1324 static int
1325 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1326 {
1327         uint64_t host_features;
1328
1329         /* Prepare guest_features: feature that driver wants to support */
1330         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1331                 req_features);
1332
1333         /* Read device(host) feature bits */
1334         host_features = VTPCI_OPS(hw)->get_features(hw);
1335         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1336                 host_features);
1337
1338         /* If supported, ensure MTU value is valid before acknowledging it. */
1339         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1340                 struct virtio_net_config config;
1341
1342                 vtpci_read_dev_config(hw,
1343                         offsetof(struct virtio_net_config, mtu),
1344                         &config.mtu, sizeof(config.mtu));
1345
1346                 if (config.mtu < RTE_ETHER_MIN_MTU)
1347                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1348         }
1349
1350         /*
1351          * Negotiate features: Subset of device feature bits are written back
1352          * guest feature bits.
1353          */
1354         hw->guest_features = req_features;
1355         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1356         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1357                 hw->guest_features);
1358
1359         if (hw->modern) {
1360                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1361                         PMD_INIT_LOG(ERR,
1362                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1363                         return -1;
1364                 }
1365                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1366                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1367                         PMD_INIT_LOG(ERR,
1368                                 "failed to set FEATURES_OK status!");
1369                         return -1;
1370                 }
1371         }
1372
1373         hw->req_guest_features = req_features;
1374
1375         return 0;
1376 }
1377
1378 int
1379 virtio_dev_pause(struct rte_eth_dev *dev)
1380 {
1381         struct virtio_hw *hw = dev->data->dev_private;
1382
1383         rte_spinlock_lock(&hw->state_lock);
1384
1385         if (hw->started == 0) {
1386                 /* Device is just stopped. */
1387                 rte_spinlock_unlock(&hw->state_lock);
1388                 return -1;
1389         }
1390         hw->started = 0;
1391         /*
1392          * Prevent the worker threads from touching queues to avoid contention,
1393          * 1 ms should be enough for the ongoing Tx function to finish.
1394          */
1395         rte_delay_ms(1);
1396         return 0;
1397 }
1398
1399 /*
1400  * Recover hw state to let the worker threads continue.
1401  */
1402 void
1403 virtio_dev_resume(struct rte_eth_dev *dev)
1404 {
1405         struct virtio_hw *hw = dev->data->dev_private;
1406
1407         hw->started = 1;
1408         rte_spinlock_unlock(&hw->state_lock);
1409 }
1410
1411 /*
1412  * Should be called only after device is paused.
1413  */
1414 int
1415 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1416                 int nb_pkts)
1417 {
1418         struct virtio_hw *hw = dev->data->dev_private;
1419         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1420         int ret;
1421
1422         hw->inject_pkts = tx_pkts;
1423         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1424         hw->inject_pkts = NULL;
1425
1426         return ret;
1427 }
1428
1429 static void
1430 virtio_notify_peers(struct rte_eth_dev *dev)
1431 {
1432         struct virtio_hw *hw = dev->data->dev_private;
1433         struct virtnet_rx *rxvq;
1434         struct rte_mbuf *rarp_mbuf;
1435
1436         if (!dev->data->rx_queues)
1437                 return;
1438
1439         rxvq = dev->data->rx_queues[0];
1440         if (!rxvq)
1441                 return;
1442
1443         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1444                         (struct rte_ether_addr *)hw->mac_addr);
1445         if (rarp_mbuf == NULL) {
1446                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1447                 return;
1448         }
1449
1450         /* If virtio port just stopped, no need to send RARP */
1451         if (virtio_dev_pause(dev) < 0) {
1452                 rte_pktmbuf_free(rarp_mbuf);
1453                 return;
1454         }
1455
1456         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1457         virtio_dev_resume(dev);
1458 }
1459
1460 static void
1461 virtio_ack_link_announce(struct rte_eth_dev *dev)
1462 {
1463         struct virtio_hw *hw = dev->data->dev_private;
1464         struct virtio_pmd_ctrl ctrl;
1465
1466         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1467         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1468
1469         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1470 }
1471
1472 /*
1473  * Process virtio config changed interrupt. Call the callback
1474  * if link state changed, generate gratuitous RARP packet if
1475  * the status indicates an ANNOUNCE.
1476  */
1477 void
1478 virtio_interrupt_handler(void *param)
1479 {
1480         struct rte_eth_dev *dev = param;
1481         struct virtio_hw *hw = dev->data->dev_private;
1482         uint8_t isr;
1483         uint16_t status;
1484
1485         /* Read interrupt status which clears interrupt */
1486         isr = vtpci_isr(hw);
1487         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1488
1489         if (virtio_intr_unmask(dev) < 0)
1490                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1491
1492         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1493                 if (virtio_dev_link_update(dev, 0) == 0)
1494                         _rte_eth_dev_callback_process(dev,
1495                                                       RTE_ETH_EVENT_INTR_LSC,
1496                                                       NULL);
1497
1498                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1499                         vtpci_read_dev_config(hw,
1500                                 offsetof(struct virtio_net_config, status),
1501                                 &status, sizeof(status));
1502                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1503                                 virtio_notify_peers(dev);
1504                                 if (hw->cvq)
1505                                         virtio_ack_link_announce(dev);
1506                         }
1507                 }
1508         }
1509 }
1510
1511 /* set rx and tx handlers according to what is supported */
1512 static void
1513 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1514 {
1515         struct virtio_hw *hw = eth_dev->data->dev_private;
1516
1517         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1518         if (vtpci_packed_queue(hw)) {
1519                 PMD_INIT_LOG(INFO,
1520                         "virtio: using packed ring %s Tx path on port %u",
1521                         hw->use_inorder_tx ? "inorder" : "standard",
1522                         eth_dev->data->port_id);
1523                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1524         } else {
1525                 if (hw->use_inorder_tx) {
1526                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1527                                 eth_dev->data->port_id);
1528                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1529                 } else {
1530                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1531                                 eth_dev->data->port_id);
1532                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1533                 }
1534         }
1535
1536         if (vtpci_packed_queue(hw)) {
1537                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1538                         PMD_INIT_LOG(INFO,
1539                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1540                                 eth_dev->data->port_id);
1541                         eth_dev->rx_pkt_burst =
1542                                 &virtio_recv_mergeable_pkts_packed;
1543                 } else {
1544                         PMD_INIT_LOG(INFO,
1545                                 "virtio: using packed ring standard Rx path on port %u",
1546                                 eth_dev->data->port_id);
1547                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1548                 }
1549         } else {
1550                 if (hw->use_simple_rx) {
1551                         PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1552                                 eth_dev->data->port_id);
1553                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1554                 } else if (hw->use_inorder_rx) {
1555                         PMD_INIT_LOG(INFO,
1556                                 "virtio: using inorder Rx path on port %u",
1557                                 eth_dev->data->port_id);
1558                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1559                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1560                         PMD_INIT_LOG(INFO,
1561                                 "virtio: using mergeable buffer Rx path on port %u",
1562                                 eth_dev->data->port_id);
1563                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1564                 } else {
1565                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1566                                 eth_dev->data->port_id);
1567                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1568                 }
1569         }
1570
1571 }
1572
1573 /* Only support 1:1 queue/interrupt mapping so far.
1574  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1575  * interrupt vectors (<N+1).
1576  */
1577 static int
1578 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1579 {
1580         uint32_t i;
1581         struct virtio_hw *hw = dev->data->dev_private;
1582
1583         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1584         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1585                 dev->intr_handle->intr_vec[i] = i + 1;
1586                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1587                                                  VIRTIO_MSI_NO_VECTOR) {
1588                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1589                         return -EBUSY;
1590                 }
1591         }
1592
1593         return 0;
1594 }
1595
1596 static void
1597 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1598 {
1599         uint32_t i;
1600         struct virtio_hw *hw = dev->data->dev_private;
1601
1602         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1603         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1604                 VTPCI_OPS(hw)->set_queue_irq(hw,
1605                                              hw->vqs[i * VTNET_CQ],
1606                                              VIRTIO_MSI_NO_VECTOR);
1607 }
1608
1609 static int
1610 virtio_configure_intr(struct rte_eth_dev *dev)
1611 {
1612         struct virtio_hw *hw = dev->data->dev_private;
1613
1614         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1615                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1616                 return -ENOTSUP;
1617         }
1618
1619         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1620                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1621                 return -1;
1622         }
1623
1624         if (!dev->intr_handle->intr_vec) {
1625                 dev->intr_handle->intr_vec =
1626                         rte_zmalloc("intr_vec",
1627                                     hw->max_queue_pairs * sizeof(int), 0);
1628                 if (!dev->intr_handle->intr_vec) {
1629                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1630                                      hw->max_queue_pairs);
1631                         return -ENOMEM;
1632                 }
1633         }
1634
1635         /* Re-register callback to update max_intr */
1636         rte_intr_callback_unregister(dev->intr_handle,
1637                                      virtio_interrupt_handler,
1638                                      dev);
1639         rte_intr_callback_register(dev->intr_handle,
1640                                    virtio_interrupt_handler,
1641                                    dev);
1642
1643         /* DO NOT try to remove this! This function will enable msix, or QEMU
1644          * will encounter SIGSEGV when DRIVER_OK is sent.
1645          * And for legacy devices, this should be done before queue/vec binding
1646          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1647          * (22) will be ignored.
1648          */
1649         if (virtio_intr_enable(dev) < 0) {
1650                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1651                 return -1;
1652         }
1653
1654         if (virtio_queues_bind_intr(dev) < 0) {
1655                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1656                 return -1;
1657         }
1658
1659         return 0;
1660 }
1661
1662 /* reset device and renegotiate features if needed */
1663 static int
1664 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1665 {
1666         struct virtio_hw *hw = eth_dev->data->dev_private;
1667         struct virtio_net_config *config;
1668         struct virtio_net_config local_config;
1669         struct rte_pci_device *pci_dev = NULL;
1670         int ret;
1671
1672         /* Reset the device although not necessary at startup */
1673         vtpci_reset(hw);
1674
1675         if (hw->vqs) {
1676                 virtio_dev_free_mbufs(eth_dev);
1677                 virtio_free_queues(hw);
1678         }
1679
1680         /* Tell the host we've noticed this device. */
1681         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1682
1683         /* Tell the host we've known how to drive the device. */
1684         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1685         if (virtio_negotiate_features(hw, req_features) < 0)
1686                 return -1;
1687
1688         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1689
1690         if (!hw->virtio_user_dev)
1691                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1692
1693         /* If host does not support both status and MSI-X then disable LSC */
1694         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1695             hw->use_msix != VIRTIO_MSIX_NONE)
1696                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1697         else
1698                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1699
1700         /* Setting up rx_header size for the device */
1701         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1702             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1703             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1704                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1705         else
1706                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1707
1708         /* Copy the permanent MAC address to: virtio_hw */
1709         virtio_get_hwaddr(hw);
1710         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1711                         &eth_dev->data->mac_addrs[0]);
1712         PMD_INIT_LOG(DEBUG,
1713                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1714                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1715                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1716
1717         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1718                 config = &local_config;
1719
1720                 vtpci_read_dev_config(hw,
1721                         offsetof(struct virtio_net_config, mac),
1722                         &config->mac, sizeof(config->mac));
1723
1724                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1725                         vtpci_read_dev_config(hw,
1726                                 offsetof(struct virtio_net_config, status),
1727                                 &config->status, sizeof(config->status));
1728                 } else {
1729                         PMD_INIT_LOG(DEBUG,
1730                                      "VIRTIO_NET_F_STATUS is not supported");
1731                         config->status = 0;
1732                 }
1733
1734                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1735                         vtpci_read_dev_config(hw,
1736                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1737                                 &config->max_virtqueue_pairs,
1738                                 sizeof(config->max_virtqueue_pairs));
1739                 } else {
1740                         PMD_INIT_LOG(DEBUG,
1741                                      "VIRTIO_NET_F_MQ is not supported");
1742                         config->max_virtqueue_pairs = 1;
1743                 }
1744
1745                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1746
1747                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1748                         vtpci_read_dev_config(hw,
1749                                 offsetof(struct virtio_net_config, mtu),
1750                                 &config->mtu,
1751                                 sizeof(config->mtu));
1752
1753                         /*
1754                          * MTU value has already been checked at negotiation
1755                          * time, but check again in case it has changed since
1756                          * then, which should not happen.
1757                          */
1758                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1759                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1760                                                 config->mtu);
1761                                 return -1;
1762                         }
1763
1764                         hw->max_mtu = config->mtu;
1765                         /* Set initial MTU to maximum one supported by vhost */
1766                         eth_dev->data->mtu = config->mtu;
1767
1768                 } else {
1769                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1770                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1771                 }
1772
1773                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1774                                 config->max_virtqueue_pairs);
1775                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1776                 PMD_INIT_LOG(DEBUG,
1777                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1778                                 config->mac[0], config->mac[1],
1779                                 config->mac[2], config->mac[3],
1780                                 config->mac[4], config->mac[5]);
1781         } else {
1782                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1783                 hw->max_queue_pairs = 1;
1784                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1785                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1786         }
1787
1788         ret = virtio_alloc_queues(eth_dev);
1789         if (ret < 0)
1790                 return ret;
1791
1792         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1793                 if (virtio_configure_intr(eth_dev) < 0) {
1794                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1795                         virtio_free_queues(hw);
1796                         return -1;
1797                 }
1798         }
1799
1800         vtpci_reinit_complete(hw);
1801
1802         if (pci_dev)
1803                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1804                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1805                         pci_dev->id.device_id);
1806
1807         return 0;
1808 }
1809
1810 /*
1811  * Remap the PCI device again (IO port map for legacy device and
1812  * memory map for modern device), so that the secondary process
1813  * could have the PCI initiated correctly.
1814  */
1815 static int
1816 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1817 {
1818         if (hw->modern) {
1819                 /*
1820                  * We don't have to re-parse the PCI config space, since
1821                  * rte_pci_map_device() makes sure the mapped address
1822                  * in secondary process would equal to the one mapped in
1823                  * the primary process: error will be returned if that
1824                  * requirement is not met.
1825                  *
1826                  * That said, we could simply reuse all cap pointers
1827                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1828                  * primary process, which is stored in shared memory.
1829                  */
1830                 if (rte_pci_map_device(pci_dev)) {
1831                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1832                         return -1;
1833                 }
1834         } else {
1835                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1836                         return -1;
1837         }
1838
1839         return 0;
1840 }
1841
1842 static void
1843 virtio_set_vtpci_ops(struct virtio_hw *hw)
1844 {
1845 #ifdef RTE_VIRTIO_USER
1846         if (hw->virtio_user_dev)
1847                 VTPCI_OPS(hw) = &virtio_user_ops;
1848         else
1849 #endif
1850         if (hw->modern)
1851                 VTPCI_OPS(hw) = &modern_ops;
1852         else
1853                 VTPCI_OPS(hw) = &legacy_ops;
1854 }
1855
1856 /*
1857  * This function is based on probe() function in virtio_pci.c
1858  * It returns 0 on success.
1859  */
1860 int
1861 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1862 {
1863         struct virtio_hw *hw = eth_dev->data->dev_private;
1864         int ret;
1865
1866         if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1867                 PMD_INIT_LOG(ERR,
1868                         "Not sufficient headroom required = %d, avail = %d",
1869                         (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1870                         RTE_PKTMBUF_HEADROOM);
1871
1872                 return -1;
1873         }
1874
1875         eth_dev->dev_ops = &virtio_eth_dev_ops;
1876
1877         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1878                 if (!hw->virtio_user_dev) {
1879                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1880                         if (ret)
1881                                 return ret;
1882                 }
1883
1884                 virtio_set_vtpci_ops(hw);
1885                 set_rxtx_funcs(eth_dev);
1886
1887                 return 0;
1888         }
1889
1890         /*
1891          * Pass the information to the rte_eth_dev_close() that it should also
1892          * release the private port resources.
1893          */
1894         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1895
1896         /* Allocate memory for storing MAC addresses */
1897         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1898                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1899         if (eth_dev->data->mac_addrs == NULL) {
1900                 PMD_INIT_LOG(ERR,
1901                         "Failed to allocate %d bytes needed to store MAC addresses",
1902                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1903                 return -ENOMEM;
1904         }
1905
1906         hw->port_id = eth_dev->data->port_id;
1907         /* For virtio_user case the hw->virtio_user_dev is populated by
1908          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1909          */
1910         if (!hw->virtio_user_dev) {
1911                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1912                 if (ret)
1913                         goto err_vtpci_init;
1914         }
1915
1916         rte_spinlock_init(&hw->state_lock);
1917
1918         /* reset device and negotiate default features */
1919         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1920         if (ret < 0)
1921                 goto err_virtio_init;
1922
1923         hw->opened = true;
1924
1925         return 0;
1926
1927 err_virtio_init:
1928         if (!hw->virtio_user_dev) {
1929                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1930                 if (!hw->modern)
1931                         rte_pci_ioport_unmap(VTPCI_IO(hw));
1932         }
1933 err_vtpci_init:
1934         rte_free(eth_dev->data->mac_addrs);
1935         eth_dev->data->mac_addrs = NULL;
1936         return ret;
1937 }
1938
1939 static int
1940 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1941 {
1942         PMD_INIT_FUNC_TRACE();
1943
1944         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1945                 return 0;
1946
1947         virtio_dev_stop(eth_dev);
1948         virtio_dev_close(eth_dev);
1949
1950         eth_dev->dev_ops = NULL;
1951         eth_dev->tx_pkt_burst = NULL;
1952         eth_dev->rx_pkt_burst = NULL;
1953
1954         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1955
1956         return 0;
1957 }
1958
1959 static int vdpa_check_handler(__rte_unused const char *key,
1960                 const char *value, __rte_unused void *opaque)
1961 {
1962         if (strcmp(value, "1"))
1963                 return -1;
1964
1965         return 0;
1966 }
1967
1968 static int
1969 vdpa_mode_selected(struct rte_devargs *devargs)
1970 {
1971         struct rte_kvargs *kvlist;
1972         const char *key = "vdpa";
1973         int ret = 0;
1974
1975         if (devargs == NULL)
1976                 return 0;
1977
1978         kvlist = rte_kvargs_parse(devargs->args, NULL);
1979         if (kvlist == NULL)
1980                 return 0;
1981
1982         if (!rte_kvargs_count(kvlist, key))
1983                 goto exit;
1984
1985         /* vdpa mode selected when there's a key-value pair: vdpa=1 */
1986         if (rte_kvargs_process(kvlist, key,
1987                                 vdpa_check_handler, NULL) < 0) {
1988                 goto exit;
1989         }
1990         ret = 1;
1991
1992 exit:
1993         rte_kvargs_free(kvlist);
1994         return ret;
1995 }
1996
1997 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1998         struct rte_pci_device *pci_dev)
1999 {
2000         /* virtio pmd skips probe if device needs to work in vdpa mode */
2001         if (vdpa_mode_selected(pci_dev->device.devargs))
2002                 return 1;
2003
2004         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
2005                 eth_virtio_dev_init);
2006 }
2007
2008 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
2009 {
2010         int ret;
2011
2012         ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
2013         /* Port has already been released by close. */
2014         if (ret == -ENODEV)
2015                 ret = 0;
2016         return ret;
2017 }
2018
2019 static struct rte_pci_driver rte_virtio_pmd = {
2020         .driver = {
2021                 .name = "net_virtio",
2022         },
2023         .id_table = pci_id_virtio_map,
2024         .drv_flags = 0,
2025         .probe = eth_virtio_pci_probe,
2026         .remove = eth_virtio_pci_remove,
2027 };
2028
2029 RTE_INIT(rte_virtio_pmd_init)
2030 {
2031         rte_eal_iopl_init();
2032         rte_pci_register(&rte_virtio_pmd);
2033 }
2034
2035 static bool
2036 rx_offload_enabled(struct virtio_hw *hw)
2037 {
2038         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2039                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2040                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2041 }
2042
2043 static bool
2044 tx_offload_enabled(struct virtio_hw *hw)
2045 {
2046         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2047                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2048                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2049 }
2050
2051 /*
2052  * Configure virtio device
2053  * It returns 0 on success.
2054  */
2055 static int
2056 virtio_dev_configure(struct rte_eth_dev *dev)
2057 {
2058         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2059         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2060         struct virtio_hw *hw = dev->data->dev_private;
2061         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2062                 hw->vtnet_hdr_size;
2063         uint64_t rx_offloads = rxmode->offloads;
2064         uint64_t tx_offloads = txmode->offloads;
2065         uint64_t req_features;
2066         int ret;
2067
2068         PMD_INIT_LOG(DEBUG, "configure");
2069         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2070
2071         if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2072                 PMD_DRV_LOG(ERR,
2073                         "Unsupported Rx multi queue mode %d",
2074                         rxmode->mq_mode);
2075                 return -EINVAL;
2076         }
2077
2078         if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2079                 PMD_DRV_LOG(ERR,
2080                         "Unsupported Tx multi queue mode %d",
2081                         txmode->mq_mode);
2082                 return -EINVAL;
2083         }
2084
2085         if (dev->data->dev_conf.intr_conf.rxq) {
2086                 ret = virtio_init_device(dev, hw->req_guest_features);
2087                 if (ret < 0)
2088                         return ret;
2089         }
2090
2091         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2092                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2093
2094         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2095                            DEV_RX_OFFLOAD_TCP_CKSUM))
2096                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2097
2098         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2099                 req_features |=
2100                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2101                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2102
2103         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2104                            DEV_TX_OFFLOAD_TCP_CKSUM))
2105                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2106
2107         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2108                 req_features |=
2109                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2110                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2111
2112         /* if request features changed, reinit the device */
2113         if (req_features != hw->req_guest_features) {
2114                 ret = virtio_init_device(dev, req_features);
2115                 if (ret < 0)
2116                         return ret;
2117         }
2118
2119         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2120                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2121                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2122                 PMD_DRV_LOG(ERR,
2123                         "rx checksum not available on this host");
2124                 return -ENOTSUP;
2125         }
2126
2127         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2128                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2129                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2130                 PMD_DRV_LOG(ERR,
2131                         "Large Receive Offload not available on this host");
2132                 return -ENOTSUP;
2133         }
2134
2135         /* start control queue */
2136         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2137                 virtio_dev_cq_start(dev);
2138
2139         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2140                 hw->vlan_strip = 1;
2141
2142         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2143             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2144                 PMD_DRV_LOG(ERR,
2145                             "vlan filtering not available on this host");
2146                 return -ENOTSUP;
2147         }
2148
2149         hw->has_tx_offload = tx_offload_enabled(hw);
2150         hw->has_rx_offload = rx_offload_enabled(hw);
2151
2152         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2153                 /* Enable vector (0) for Link State Intrerrupt */
2154                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2155                                 VIRTIO_MSI_NO_VECTOR) {
2156                         PMD_DRV_LOG(ERR, "failed to set config vector");
2157                         return -EBUSY;
2158                 }
2159
2160         hw->use_simple_rx = 1;
2161
2162         if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2163                 hw->use_inorder_tx = 1;
2164                 hw->use_inorder_rx = 1;
2165                 hw->use_simple_rx = 0;
2166         }
2167
2168         if (vtpci_packed_queue(hw)) {
2169                 hw->use_simple_rx = 0;
2170                 hw->use_inorder_rx = 0;
2171         }
2172
2173 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
2174         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2175                 hw->use_simple_rx = 0;
2176         }
2177 #endif
2178         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2179                  hw->use_simple_rx = 0;
2180         }
2181
2182         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2183                            DEV_RX_OFFLOAD_TCP_CKSUM |
2184                            DEV_RX_OFFLOAD_TCP_LRO |
2185                            DEV_RX_OFFLOAD_VLAN_STRIP))
2186                 hw->use_simple_rx = 0;
2187
2188         return 0;
2189 }
2190
2191
2192 static int
2193 virtio_dev_start(struct rte_eth_dev *dev)
2194 {
2195         uint16_t nb_queues, i;
2196         struct virtnet_rx *rxvq;
2197         struct virtnet_tx *txvq __rte_unused;
2198         struct virtio_hw *hw = dev->data->dev_private;
2199         int ret;
2200
2201         /* Finish the initialization of the queues */
2202         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2203                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2204                 if (ret < 0)
2205                         return ret;
2206         }
2207         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2208                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2209                 if (ret < 0)
2210                         return ret;
2211         }
2212
2213         /* check if lsc interrupt feature is enabled */
2214         if (dev->data->dev_conf.intr_conf.lsc) {
2215                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2216                         PMD_DRV_LOG(ERR, "link status not supported by host");
2217                         return -ENOTSUP;
2218                 }
2219         }
2220
2221         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2222          * in device configure, but it could be unmapped  when device is
2223          * stopped.
2224          */
2225         if (dev->data->dev_conf.intr_conf.lsc ||
2226             dev->data->dev_conf.intr_conf.rxq) {
2227                 virtio_intr_disable(dev);
2228
2229                 /* Setup interrupt callback  */
2230                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2231                         rte_intr_callback_register(dev->intr_handle,
2232                                                    virtio_interrupt_handler,
2233                                                    dev);
2234
2235                 if (virtio_intr_enable(dev) < 0) {
2236                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2237                         return -EIO;
2238                 }
2239         }
2240
2241         /*Notify the backend
2242          *Otherwise the tap backend might already stop its queue due to fullness.
2243          *vhost backend will have no chance to be waked up
2244          */
2245         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2246         if (hw->max_queue_pairs > 1) {
2247                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2248                         return -EINVAL;
2249         }
2250
2251         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2252
2253         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2254                 rxvq = dev->data->rx_queues[i];
2255                 /* Flush the old packets */
2256                 virtqueue_rxvq_flush(rxvq->vq);
2257                 virtqueue_notify(rxvq->vq);
2258         }
2259
2260         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2261                 txvq = dev->data->tx_queues[i];
2262                 virtqueue_notify(txvq->vq);
2263         }
2264
2265         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2266
2267         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2268                 rxvq = dev->data->rx_queues[i];
2269                 VIRTQUEUE_DUMP(rxvq->vq);
2270         }
2271
2272         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2273                 txvq = dev->data->tx_queues[i];
2274                 VIRTQUEUE_DUMP(txvq->vq);
2275         }
2276
2277         set_rxtx_funcs(dev);
2278         hw->started = true;
2279
2280         /* Initialize Link state */
2281         virtio_dev_link_update(dev, 0);
2282
2283         return 0;
2284 }
2285
2286 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2287 {
2288         struct virtio_hw *hw = dev->data->dev_private;
2289         uint16_t nr_vq = virtio_get_nr_vq(hw);
2290         const char *type __rte_unused;
2291         unsigned int i, mbuf_num = 0;
2292         struct virtqueue *vq;
2293         struct rte_mbuf *buf;
2294         int queue_type;
2295
2296         if (hw->vqs == NULL)
2297                 return;
2298
2299         for (i = 0; i < nr_vq; i++) {
2300                 vq = hw->vqs[i];
2301                 if (!vq)
2302                         continue;
2303
2304                 queue_type = virtio_get_queue_type(hw, i);
2305                 if (queue_type == VTNET_RQ)
2306                         type = "rxq";
2307                 else if (queue_type == VTNET_TQ)
2308                         type = "txq";
2309                 else
2310                         continue;
2311
2312                 PMD_INIT_LOG(DEBUG,
2313                         "Before freeing %s[%d] used and unused buf",
2314                         type, i);
2315                 VIRTQUEUE_DUMP(vq);
2316
2317                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2318                         rte_pktmbuf_free(buf);
2319                         mbuf_num++;
2320                 }
2321
2322                 PMD_INIT_LOG(DEBUG,
2323                         "After freeing %s[%d] used and unused buf",
2324                         type, i);
2325                 VIRTQUEUE_DUMP(vq);
2326         }
2327
2328         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2329 }
2330
2331 /*
2332  * Stop device: disable interrupt and mark link down
2333  */
2334 static void
2335 virtio_dev_stop(struct rte_eth_dev *dev)
2336 {
2337         struct virtio_hw *hw = dev->data->dev_private;
2338         struct rte_eth_link link;
2339         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2340
2341         PMD_INIT_LOG(DEBUG, "stop");
2342
2343         rte_spinlock_lock(&hw->state_lock);
2344         if (!hw->started)
2345                 goto out_unlock;
2346         hw->started = false;
2347
2348         if (intr_conf->lsc || intr_conf->rxq) {
2349                 virtio_intr_disable(dev);
2350
2351                 /* Reset interrupt callback  */
2352                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2353                         rte_intr_callback_unregister(dev->intr_handle,
2354                                                      virtio_interrupt_handler,
2355                                                      dev);
2356                 }
2357         }
2358
2359         memset(&link, 0, sizeof(link));
2360         rte_eth_linkstatus_set(dev, &link);
2361 out_unlock:
2362         rte_spinlock_unlock(&hw->state_lock);
2363 }
2364
2365 static int
2366 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2367 {
2368         struct rte_eth_link link;
2369         uint16_t status;
2370         struct virtio_hw *hw = dev->data->dev_private;
2371
2372         memset(&link, 0, sizeof(link));
2373         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2374         link.link_speed  = ETH_SPEED_NUM_10G;
2375         link.link_autoneg = ETH_LINK_FIXED;
2376
2377         if (!hw->started) {
2378                 link.link_status = ETH_LINK_DOWN;
2379         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2380                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2381                 vtpci_read_dev_config(hw,
2382                                 offsetof(struct virtio_net_config, status),
2383                                 &status, sizeof(status));
2384                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2385                         link.link_status = ETH_LINK_DOWN;
2386                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2387                                      dev->data->port_id);
2388                 } else {
2389                         link.link_status = ETH_LINK_UP;
2390                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2391                                      dev->data->port_id);
2392                 }
2393         } else {
2394                 link.link_status = ETH_LINK_UP;
2395         }
2396
2397         return rte_eth_linkstatus_set(dev, &link);
2398 }
2399
2400 static int
2401 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2402 {
2403         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2404         struct virtio_hw *hw = dev->data->dev_private;
2405         uint64_t offloads = rxmode->offloads;
2406
2407         if (mask & ETH_VLAN_FILTER_MASK) {
2408                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2409                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2410
2411                         PMD_DRV_LOG(NOTICE,
2412                                 "vlan filtering not available on this host");
2413
2414                         return -ENOTSUP;
2415                 }
2416         }
2417
2418         if (mask & ETH_VLAN_STRIP_MASK)
2419                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2420
2421         return 0;
2422 }
2423
2424 static int
2425 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2426 {
2427         uint64_t tso_mask, host_features;
2428         struct virtio_hw *hw = dev->data->dev_private;
2429
2430         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2431
2432         dev_info->max_rx_queues =
2433                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2434         dev_info->max_tx_queues =
2435                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2436         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2437         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2438         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2439
2440         host_features = VTPCI_OPS(hw)->get_features(hw);
2441         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2442         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2443         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2444                 dev_info->rx_offload_capa |=
2445                         DEV_RX_OFFLOAD_TCP_CKSUM |
2446                         DEV_RX_OFFLOAD_UDP_CKSUM;
2447         }
2448         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2449                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2450         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2451                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2452         if ((host_features & tso_mask) == tso_mask)
2453                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2454
2455         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2456                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2457         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2458                 dev_info->tx_offload_capa |=
2459                         DEV_TX_OFFLOAD_UDP_CKSUM |
2460                         DEV_TX_OFFLOAD_TCP_CKSUM;
2461         }
2462         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2463                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2464         if ((host_features & tso_mask) == tso_mask)
2465                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2466
2467         return 0;
2468 }
2469
2470 /*
2471  * It enables testpmd to collect per queue stats.
2472  */
2473 static int
2474 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2475 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2476 __rte_unused uint8_t is_rx)
2477 {
2478         return 0;
2479 }
2480
2481 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2482 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2483 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2484
2485 RTE_INIT(virtio_init_log)
2486 {
2487         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2488         if (virtio_logtype_init >= 0)
2489                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2490         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2491         if (virtio_logtype_driver >= 0)
2492                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2493 }