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