drivers/net/virtio/virtio_ethdev.c

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