drivers/net/virtio/virtio_ethdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <string.h>
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <unistd.h>
  10
  11 #include <rte_ethdev_driver.h>
  12 #include <rte_ethdev_pci.h>
  13 #include <rte_memcpy.h>
  14 #include <rte_string_fns.h>
  15 #include <rte_memzone.h>
  16 #include <rte_malloc.h>
  17 #include <rte_branch_prediction.h>
  18 #include <rte_pci.h>
  19 #include <rte_bus_pci.h>
  20 #include <rte_ether.h>
  21 #include <rte_ip.h>
  22 #include <rte_arp.h>
  23 #include <rte_common.h>
  24 #include <rte_errno.h>
  25 #include <rte_cpuflags.h>
  26
  27 #include <rte_memory.h>
  28 #include <rte_eal.h>
  29 #include <rte_dev.h>
  30 #include <rte_cycles.h>
  31 #include <rte_kvargs.h>
  32
  33 #include "virtio_ethdev.h"
  34 #include "virtio_pci.h"
  35 #include "virtio_logs.h"
  36 #include "virtqueue.h"
  37 #include "virtio_rxtx.h"
  38 #include "virtio_user/virtio_user_dev.h"
  39
  40 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  41 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  42 static int  virtio_dev_start(struct rte_eth_dev *dev);
  43 static void virtio_dev_stop(struct rte_eth_dev *dev);
  44 static int virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  45 static int virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  46 static int virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  47 static int virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  48 static uint32_t virtio_dev_speed_capa_get(uint32_t speed);
  49 static int virtio_dev_devargs_parse(struct rte_devargs *devargs,
  50         int *vdpa,
  51         uint32_t *speed,
  52         int *vectorized);
  53 static int virtio_dev_info_get(struct rte_eth_dev *dev,
  54                                 struct rte_eth_dev_info *dev_info);
  55 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  56         int wait_to_complete);
  57 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  58
  59 static void virtio_set_hwaddr(struct virtio_hw *hw);
  60 static void virtio_get_hwaddr(struct virtio_hw *hw);
  61
  62 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  63                                  struct rte_eth_stats *stats);
  64 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  65                                  struct rte_eth_xstat *xstats, unsigned n);
  66 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  67                                        struct rte_eth_xstat_name *xstats_names,
  68                                        unsigned limit);
  69 static int virtio_dev_stats_reset(struct rte_eth_dev *dev);
  70 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  71 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  72                                 uint16_t vlan_id, int on);
  73 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  74                                 struct rte_ether_addr *mac_addr,
  75                                 uint32_t index, uint32_t vmdq);
  76 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  77 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
  78                                 struct rte_ether_addr *mac_addr);
  79
  80 static int virtio_intr_disable(struct rte_eth_dev *dev);
  81
  82 static int virtio_dev_queue_stats_mapping_set(
  83         struct rte_eth_dev *eth_dev,
  84         uint16_t queue_id,
  85         uint8_t stat_idx,
  86         uint8_t is_rx);
  87
  88 static void virtio_notify_peers(struct rte_eth_dev *dev);
  89 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  90
  91 /*
  92  * The set of PCI devices this driver supports
  93  */
  94 static const struct rte_pci_id pci_id_virtio_map[] = {
  95         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  96         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  97         { .vendor_id = 0, /* sentinel */ },
  98 };
  99
 100 struct rte_virtio_xstats_name_off {
 101         char name[RTE_ETH_XSTATS_NAME_SIZE];
 102         unsigned offset;
 103 };
 104
 105 /* [rt]x_qX_ is prepended to the name string here */
 106 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 107         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 108         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 109         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 110         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 111         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 112         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 113         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 114         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 115         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 116         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 117         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 118         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 119         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 120 };
 121
 122 /* [rt]x_qX_ is prepended to the name string here */
 123 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 124         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 125         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 126         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 127         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 128         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 129         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 130         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 131         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 132         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 133         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 134         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 135         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 136 };
 137
 138 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 139                             sizeof(rte_virtio_rxq_stat_strings[0]))
 140 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 141                             sizeof(rte_virtio_txq_stat_strings[0]))
 142
 143 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 144
 145 static struct virtio_pmd_ctrl *
 146 virtio_send_command_packed(struct virtnet_ctl *cvq,
 147                            struct virtio_pmd_ctrl *ctrl,
 148                            int *dlen, int pkt_num)
 149 {
 150         struct virtqueue *vq = cvq->vq;
 151         int head;
 152         struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
 153         struct virtio_pmd_ctrl *result;
 154         uint16_t flags;
 155         int sum = 0;
 156         int nb_descs = 0;
 157         int k;
 158
 159         /*
 160          * Format is enforced in qemu code:
 161          * One TX packet for header;
 162          * At least one TX packet per argument;
 163          * One RX packet for ACK.
 164          */
 165         head = vq->vq_avail_idx;
 166         flags = vq->vq_packed.cached_flags;
 167         desc[head].addr = cvq->virtio_net_hdr_mem;
 168         desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 169         vq->vq_free_cnt--;
 170         nb_descs++;
 171         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 172                 vq->vq_avail_idx -= vq->vq_nentries;
 173                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 174         }
 175
 176         for (k = 0; k < pkt_num; k++) {
 177                 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 178                         + sizeof(struct virtio_net_ctrl_hdr)
 179                         + sizeof(ctrl->status) + sizeof(uint8_t) * sum;
 180                 desc[vq->vq_avail_idx].len = dlen[k];
 181                 desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
 182                         vq->vq_packed.cached_flags;
 183                 sum += dlen[k];
 184                 vq->vq_free_cnt--;
 185                 nb_descs++;
 186                 if (++vq->vq_avail_idx >= vq->vq_nentries) {
 187                         vq->vq_avail_idx -= vq->vq_nentries;
 188                         vq->vq_packed.cached_flags ^=
 189                                 VRING_PACKED_DESC_F_AVAIL_USED;
 190                 }
 191         }
 192
 193         desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 194                 + sizeof(struct virtio_net_ctrl_hdr);
 195         desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
 196         desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
 197                 vq->vq_packed.cached_flags;
 198         vq->vq_free_cnt--;
 199         nb_descs++;
 200         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 201                 vq->vq_avail_idx -= vq->vq_nentries;
 202                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 203         }
 204
 205         virtio_wmb(vq->hw->weak_barriers);
 206         desc[head].flags = VRING_DESC_F_NEXT | flags;
 207
 208         virtio_wmb(vq->hw->weak_barriers);
 209         virtqueue_notify(vq);
 210
 211         /* wait for used descriptors in virtqueue */
 212         while (!desc_is_used(&desc[head], vq))
 213                 usleep(100);
 214
 215         virtio_rmb(vq->hw->weak_barriers);
 216
 217         /* now get used descriptors */
 218         vq->vq_free_cnt += nb_descs;
 219         vq->vq_used_cons_idx += nb_descs;
 220         if (vq->vq_used_cons_idx >= vq->vq_nentries) {
 221                 vq->vq_used_cons_idx -= vq->vq_nentries;
 222                 vq->vq_packed.used_wrap_counter ^= 1;
 223         }
 224
 225         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
 226                         "vq->vq_avail_idx=%d\n"
 227                         "vq->vq_used_cons_idx=%d\n"
 228                         "vq->vq_packed.cached_flags=0x%x\n"
 229                         "vq->vq_packed.used_wrap_counter=%d\n",
 230                         vq->vq_free_cnt,
 231                         vq->vq_avail_idx,
 232                         vq->vq_used_cons_idx,
 233                         vq->vq_packed.cached_flags,
 234                         vq->vq_packed.used_wrap_counter);
 235
 236         result = cvq->virtio_net_hdr_mz->addr;
 237         return result;
 238 }
 239
 240 static struct virtio_pmd_ctrl *
 241 virtio_send_command_split(struct virtnet_ctl *cvq,
 242                           struct virtio_pmd_ctrl *ctrl,
 243                           int *dlen, int pkt_num)
 244 {
 245         struct virtio_pmd_ctrl *result;
 246         struct virtqueue *vq = cvq->vq;
 247         uint32_t head, i;
 248         int k, sum = 0;
 249
 250         head = vq->vq_desc_head_idx;
 251
 252         /*
 253          * Format is enforced in qemu code:
 254          * One TX packet for header;
 255          * At least one TX packet per argument;
 256          * One RX packet for ACK.
 257          */
 258         vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
 259         vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 260         vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 261         vq->vq_free_cnt--;
 262         i = vq->vq_split.ring.desc[head].next;
 263
 264         for (k = 0; k < pkt_num; k++) {
 265                 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
 266                 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 267                         + sizeof(struct virtio_net_ctrl_hdr)
 268                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 269                 vq->vq_split.ring.desc[i].len = dlen[k];
 270                 sum += dlen[k];
 271                 vq->vq_free_cnt--;
 272                 i = vq->vq_split.ring.desc[i].next;
 273         }
 274
 275         vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
 276         vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 277                         + sizeof(struct virtio_net_ctrl_hdr);
 278         vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
 279         vq->vq_free_cnt--;
 280
 281         vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
 282
 283         vq_update_avail_ring(vq, head);
 284         vq_update_avail_idx(vq);
 285
 286         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 287
 288         virtqueue_notify(vq);
 289
 290         while (virtqueue_nused(vq) == 0)
 291                 usleep(100);
 292
 293         while (virtqueue_nused(vq)) {
 294                 uint32_t idx, desc_idx, used_idx;
 295                 struct vring_used_elem *uep;
 296
 297                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 298                                 & (vq->vq_nentries - 1));
 299                 uep = &vq->vq_split.ring.used->ring[used_idx];
 300                 idx = (uint32_t) uep->id;
 301                 desc_idx = idx;
 302
 303                 while (vq->vq_split.ring.desc[desc_idx].flags &
 304                                 VRING_DESC_F_NEXT) {
 305                         desc_idx = vq->vq_split.ring.desc[desc_idx].next;
 306                         vq->vq_free_cnt++;
 307                 }
 308
 309                 vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 310                 vq->vq_desc_head_idx = idx;
 311
 312                 vq->vq_used_cons_idx++;
 313                 vq->vq_free_cnt++;
 314         }
 315
 316         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 317                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 318
 319         result = cvq->virtio_net_hdr_mz->addr;
 320         return result;
 321 }
 322
 323 static int
 324 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 325                     int *dlen, int pkt_num)
 326 {
 327         virtio_net_ctrl_ack status = ~0;
 328         struct virtio_pmd_ctrl *result;
 329         struct virtqueue *vq;
 330
 331         ctrl->status = status;
 332
 333         if (!cvq || !cvq->vq) {
 334                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 335                 return -1;
 336         }
 337
 338         rte_spinlock_lock(&cvq->lock);
 339         vq = cvq->vq;
 340
 341         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 342                 "vq->hw->cvq = %p vq = %p",
 343                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 344
 345         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 346                 rte_spinlock_unlock(&cvq->lock);
 347                 return -1;
 348         }
 349
 350         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 351                 sizeof(struct virtio_pmd_ctrl));
 352
 353         if (vtpci_packed_queue(vq->hw))
 354                 result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
 355         else
 356                 result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
 357
 358         rte_spinlock_unlock(&cvq->lock);
 359         return result->status;
 360 }
 361
 362 static int
 363 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 364 {
 365         struct virtio_hw *hw = dev->data->dev_private;
 366         struct virtio_pmd_ctrl ctrl;
 367         int dlen[1];
 368         int ret;
 369
 370         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 371         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 372         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 373
 374         dlen[0] = sizeof(uint16_t);
 375
 376         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 377         if (ret) {
 378                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 379                           "failed, this is too late now...");
 380                 return -EINVAL;
 381         }
 382
 383         return 0;
 384 }
 385
 386 static void
 387 virtio_dev_queue_release(void *queue __rte_unused)
 388 {
 389         /* do nothing */
 390 }
 391
 392 static uint16_t
 393 virtio_get_nr_vq(struct virtio_hw *hw)
 394 {
 395         uint16_t nr_vq = hw->max_queue_pairs * 2;
 396
 397         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 398                 nr_vq += 1;
 399
 400         return nr_vq;
 401 }
 402
 403 static void
 404 virtio_init_vring(struct virtqueue *vq)
 405 {
 406         int size = vq->vq_nentries;
 407         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 408
 409         PMD_INIT_FUNC_TRACE();
 410
 411         memset(ring_mem, 0, vq->vq_ring_size);
 412
 413         vq->vq_used_cons_idx = 0;
 414         vq->vq_desc_head_idx = 0;
 415         vq->vq_avail_idx = 0;
 416         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 417         vq->vq_free_cnt = vq->vq_nentries;
 418         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 419         if (vtpci_packed_queue(vq->hw)) {
 420                 vring_init_packed(&vq->vq_packed.ring, ring_mem,
 421                                   VIRTIO_PCI_VRING_ALIGN, size);
 422                 vring_desc_init_packed(vq, size);
 423         } else {
 424                 struct vring *vr = &vq->vq_split.ring;
 425
 426                 vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size);
 427                 vring_desc_init_split(vr->desc, size);
 428         }
 429         /*
 430          * Disable device(host) interrupting guest
 431          */
 432         virtqueue_disable_intr(vq);
 433 }
 434
 435 static int
 436 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 437 {
 438         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 439         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 440         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 441         unsigned int vq_size, size;
 442         struct virtio_hw *hw = dev->data->dev_private;
 443         struct virtnet_rx *rxvq = NULL;
 444         struct virtnet_tx *txvq = NULL;
 445         struct virtnet_ctl *cvq = NULL;
 446         struct virtqueue *vq;
 447         size_t sz_hdr_mz = 0;
 448         void *sw_ring = NULL;
 449         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 450         int ret;
 451         int numa_node = dev->device->numa_node;
 452
 453         PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
 454                         vtpci_queue_idx, numa_node);
 455
 456         /*
 457          * Read the virtqueue size from the Queue Size field
 458          * Always power of 2 and if 0 virtqueue does not exist
 459          */
 460         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 461         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 462         if (vq_size == 0) {
 463                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 464                 return -EINVAL;
 465         }
 466
 467         if (!vtpci_packed_queue(hw) && !rte_is_power_of_2(vq_size)) {
 468                 PMD_INIT_LOG(ERR, "split virtqueue size is not power of 2");
 469                 return -EINVAL;
 470         }
 471
 472         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 473                  dev->data->port_id, vtpci_queue_idx);
 474
 475         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 476                                 vq_size * sizeof(struct vq_desc_extra),
 477                                 RTE_CACHE_LINE_SIZE);
 478         if (queue_type == VTNET_TQ) {
 479                 /*
 480                  * For each xmit packet, allocate a virtio_net_hdr
 481                  * and indirect ring elements
 482                  */
 483                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 484         } else if (queue_type == VTNET_CQ) {
 485                 /* Allocate a page for control vq command, data and status */
 486                 sz_hdr_mz = PAGE_SIZE;
 487         }
 488
 489         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 490                                 numa_node);
 491         if (vq == NULL) {
 492                 PMD_INIT_LOG(ERR, "can not allocate vq");
 493                 return -ENOMEM;
 494         }
 495         hw->vqs[vtpci_queue_idx] = vq;
 496
 497         vq->hw = hw;
 498         vq->vq_queue_index = vtpci_queue_idx;
 499         vq->vq_nentries = vq_size;
 500         if (vtpci_packed_queue(hw)) {
 501                 vq->vq_packed.used_wrap_counter = 1;
 502                 vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
 503                 vq->vq_packed.event_flags_shadow = 0;
 504                 if (queue_type == VTNET_RQ)
 505                         vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
 506         }
 507
 508         /*
 509          * Reserve a memzone for vring elements
 510          */
 511         size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN);
 512         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 513         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 514                      size, vq->vq_ring_size);
 515
 516         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 517                         numa_node, RTE_MEMZONE_IOVA_CONTIG,
 518                         VIRTIO_PCI_VRING_ALIGN);
 519         if (mz == NULL) {
 520                 if (rte_errno == EEXIST)
 521                         mz = rte_memzone_lookup(vq_name);
 522                 if (mz == NULL) {
 523                         ret = -ENOMEM;
 524                         goto fail_q_alloc;
 525                 }
 526         }
 527
 528         memset(mz->addr, 0, mz->len);
 529
 530         vq->vq_ring_mem = mz->iova;
 531         vq->vq_ring_virt_mem = mz->addr;
 532         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 533                      (uint64_t)mz->iova);
 534         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 535                      (uint64_t)(uintptr_t)mz->addr);
 536
 537         virtio_init_vring(vq);
 538
 539         if (sz_hdr_mz) {
 540                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 541                          dev->data->port_id, vtpci_queue_idx);
 542                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 543                                 numa_node, RTE_MEMZONE_IOVA_CONTIG,
 544                                 RTE_CACHE_LINE_SIZE);
 545                 if (hdr_mz == NULL) {
 546                         if (rte_errno == EEXIST)
 547                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 548                         if (hdr_mz == NULL) {
 549                                 ret = -ENOMEM;
 550                                 goto fail_q_alloc;
 551                         }
 552                 }
 553         }
 554
 555         if (queue_type == VTNET_RQ) {
 556                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 557                                sizeof(vq->sw_ring[0]);
 558
 559                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 560                                 RTE_CACHE_LINE_SIZE, numa_node);
 561                 if (!sw_ring) {
 562                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 563                         ret = -ENOMEM;
 564                         goto fail_q_alloc;
 565                 }
 566
 567                 vq->sw_ring = sw_ring;
 568                 rxvq = &vq->rxq;
 569                 rxvq->vq = vq;
 570                 rxvq->port_id = dev->data->port_id;
 571                 rxvq->mz = mz;
 572         } else if (queue_type == VTNET_TQ) {
 573                 txvq = &vq->txq;
 574                 txvq->vq = vq;
 575                 txvq->port_id = dev->data->port_id;
 576                 txvq->mz = mz;
 577                 txvq->virtio_net_hdr_mz = hdr_mz;
 578                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 579         } else if (queue_type == VTNET_CQ) {
 580                 cvq = &vq->cq;
 581                 cvq->vq = vq;
 582                 cvq->mz = mz;
 583                 cvq->virtio_net_hdr_mz = hdr_mz;
 584                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 585                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 586
 587                 hw->cvq = cvq;
 588         }
 589
 590         /* For virtio_user case (that is when hw->virtio_user_dev is not NULL),
 591          * we use virtual address. And we need properly set _offset_, please see
 592          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 593          */
 594         if (!hw->virtio_user_dev)
 595                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 596         else {
 597                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 598                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 599                 if (queue_type == VTNET_TQ)
 600                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 601                 else if (queue_type == VTNET_CQ)
 602                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 603         }
 604
 605         if (queue_type == VTNET_TQ) {
 606                 struct virtio_tx_region *txr;
 607                 unsigned int i;
 608
 609                 txr = hdr_mz->addr;
 610                 memset(txr, 0, vq_size * sizeof(*txr));
 611                 for (i = 0; i < vq_size; i++) {
 612                         struct vring_desc *start_dp = txr[i].tx_indir;
 613
 614                         /* first indirect descriptor is always the tx header */
 615                         if (!vtpci_packed_queue(hw)) {
 616                                 vring_desc_init_split(start_dp,
 617                                                       RTE_DIM(txr[i].tx_indir));
 618                                 start_dp->addr = txvq->virtio_net_hdr_mem
 619                                         + i * sizeof(*txr)
 620                                         + offsetof(struct virtio_tx_region,
 621                                                    tx_hdr);
 622                                 start_dp->len = hw->vtnet_hdr_size;
 623                                 start_dp->flags = VRING_DESC_F_NEXT;
 624                         }
 625                 }
 626         }
 627
 628         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 629                 PMD_INIT_LOG(ERR, "setup_queue failed");
 630                 return -EINVAL;
 631         }
 632
 633         return 0;
 634
 635 fail_q_alloc:
 636         rte_free(sw_ring);
 637         rte_memzone_free(hdr_mz);
 638         rte_memzone_free(mz);
 639         rte_free(vq);
 640
 641         return ret;
 642 }
 643
 644 static void
 645 virtio_free_queues(struct virtio_hw *hw)
 646 {
 647         uint16_t nr_vq = virtio_get_nr_vq(hw);
 648         struct virtqueue *vq;
 649         int queue_type;
 650         uint16_t i;
 651
 652         if (hw->vqs == NULL)
 653                 return;
 654
 655         for (i = 0; i < nr_vq; i++) {
 656                 vq = hw->vqs[i];
 657                 if (!vq)
 658                         continue;
 659
 660                 queue_type = virtio_get_queue_type(hw, i);
 661                 if (queue_type == VTNET_RQ) {
 662                         rte_free(vq->sw_ring);
 663                         rte_memzone_free(vq->rxq.mz);
 664                 } else if (queue_type == VTNET_TQ) {
 665                         rte_memzone_free(vq->txq.mz);
 666                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 667                 } else {
 668                         rte_memzone_free(vq->cq.mz);
 669                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 670                 }
 671
 672                 rte_free(vq);
 673                 hw->vqs[i] = NULL;
 674         }
 675
 676         rte_free(hw->vqs);
 677         hw->vqs = NULL;
 678 }
 679
 680 static int
 681 virtio_alloc_queues(struct rte_eth_dev *dev)
 682 {
 683         struct virtio_hw *hw = dev->data->dev_private;
 684         uint16_t nr_vq = virtio_get_nr_vq(hw);
 685         uint16_t i;
 686         int ret;
 687
 688         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 689         if (!hw->vqs) {
 690                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 691                 return -ENOMEM;
 692         }
 693
 694         for (i = 0; i < nr_vq; i++) {
 695                 ret = virtio_init_queue(dev, i);
 696                 if (ret < 0) {
 697                         virtio_free_queues(hw);
 698                         return ret;
 699                 }
 700         }
 701
 702         return 0;
 703 }
 704
 705 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 706
 707 static int
 708 virtio_dev_close(struct rte_eth_dev *dev)
 709 {
 710         struct virtio_hw *hw = dev->data->dev_private;
 711         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 712
 713         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 714         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 715                 return 0;
 716
 717         if (!hw->opened)
 718                 return 0;
 719         hw->opened = false;
 720
 721         /* reset the NIC */
 722         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 723                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 724         if (intr_conf->rxq)
 725                 virtio_queues_unbind_intr(dev);
 726
 727         if (intr_conf->lsc || intr_conf->rxq) {
 728                 virtio_intr_disable(dev);
 729                 rte_intr_efd_disable(dev->intr_handle);
 730                 rte_free(dev->intr_handle->intr_vec);
 731                 dev->intr_handle->intr_vec = NULL;
 732         }
 733
 734         vtpci_reset(hw);
 735         virtio_dev_free_mbufs(dev);
 736         virtio_free_queues(hw);
 737
 738 #ifdef RTE_VIRTIO_USER
 739         if (hw->virtio_user_dev)
 740                 virtio_user_dev_uninit(hw->virtio_user_dev);
 741         else
 742 #endif
 743         if (dev->device) {
 744                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(dev));
 745                 if (!hw->modern)
 746                         rte_pci_ioport_unmap(VTPCI_IO(hw));
 747         }
 748
 749         return 0;
 750 }
 751
 752 static int
 753 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 754 {
 755         struct virtio_hw *hw = dev->data->dev_private;
 756         struct virtio_pmd_ctrl ctrl;
 757         int dlen[1];
 758         int ret;
 759
 760         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 761                 PMD_INIT_LOG(INFO, "host does not support rx control");
 762                 return -ENOTSUP;
 763         }
 764
 765         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 766         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 767         ctrl.data[0] = 1;
 768         dlen[0] = 1;
 769
 770         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 771         if (ret) {
 772                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 773                 return -EAGAIN;
 774         }
 775
 776         return 0;
 777 }
 778
 779 static int
 780 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 781 {
 782         struct virtio_hw *hw = dev->data->dev_private;
 783         struct virtio_pmd_ctrl ctrl;
 784         int dlen[1];
 785         int ret;
 786
 787         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 788                 PMD_INIT_LOG(INFO, "host does not support rx control");
 789                 return -ENOTSUP;
 790         }
 791
 792         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 793         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 794         ctrl.data[0] = 0;
 795         dlen[0] = 1;
 796
 797         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 798         if (ret) {
 799                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 800                 return -EAGAIN;
 801         }
 802
 803         return 0;
 804 }
 805
 806 static int
 807 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 808 {
 809         struct virtio_hw *hw = dev->data->dev_private;
 810         struct virtio_pmd_ctrl ctrl;
 811         int dlen[1];
 812         int ret;
 813
 814         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 815                 PMD_INIT_LOG(INFO, "host does not support rx control");
 816                 return -ENOTSUP;
 817         }
 818
 819         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 820         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 821         ctrl.data[0] = 1;
 822         dlen[0] = 1;
 823
 824         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 825         if (ret) {
 826                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 827                 return -EAGAIN;
 828         }
 829
 830         return 0;
 831 }
 832
 833 static int
 834 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 835 {
 836         struct virtio_hw *hw = dev->data->dev_private;
 837         struct virtio_pmd_ctrl ctrl;
 838         int dlen[1];
 839         int ret;
 840
 841         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 842                 PMD_INIT_LOG(INFO, "host does not support rx control");
 843                 return -ENOTSUP;
 844         }
 845
 846         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 847         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 848         ctrl.data[0] = 0;
 849         dlen[0] = 1;
 850
 851         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 852         if (ret) {
 853                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 854                 return -EAGAIN;
 855         }
 856
 857         return 0;
 858 }
 859
 860 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 861 static int
 862 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 863 {
 864         struct virtio_hw *hw = dev->data->dev_private;
 865         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 866                                  hw->vtnet_hdr_size;
 867         uint32_t frame_size = mtu + ether_hdr_len;
 868         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 869
 870         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 871
 872         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 873                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 874                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 875                 return -EINVAL;
 876         }
 877         return 0;
 878 }
 879
 880 static int
 881 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 882 {
 883         struct virtio_hw *hw = dev->data->dev_private;
 884         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 885         struct virtqueue *vq = rxvq->vq;
 886
 887         virtqueue_enable_intr(vq);
 888         virtio_mb(hw->weak_barriers);
 889         return 0;
 890 }
 891
 892 static int
 893 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 894 {
 895         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 896         struct virtqueue *vq = rxvq->vq;
 897
 898         virtqueue_disable_intr(vq);
 899         return 0;
 900 }
 901
 902 /*
 903  * dev_ops for virtio, bare necessities for basic operation
 904  */
 905 static const struct eth_dev_ops virtio_eth_dev_ops = {
 906         .dev_configure           = virtio_dev_configure,
 907         .dev_start               = virtio_dev_start,
 908         .dev_stop                = virtio_dev_stop,
 909         .dev_close               = virtio_dev_close,
 910         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 911         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 912         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 913         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 914         .mtu_set                 = virtio_mtu_set,
 915         .dev_infos_get           = virtio_dev_info_get,
 916         .stats_get               = virtio_dev_stats_get,
 917         .xstats_get              = virtio_dev_xstats_get,
 918         .xstats_get_names        = virtio_dev_xstats_get_names,
 919         .stats_reset             = virtio_dev_stats_reset,
 920         .xstats_reset            = virtio_dev_stats_reset,
 921         .link_update             = virtio_dev_link_update,
 922         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 923         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 924         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 925         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 926         .rx_queue_release        = virtio_dev_queue_release,
 927         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 928         .tx_queue_release        = virtio_dev_queue_release,
 929         /* collect stats per queue */
 930         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 931         .vlan_filter_set         = virtio_vlan_filter_set,
 932         .mac_addr_add            = virtio_mac_addr_add,
 933         .mac_addr_remove         = virtio_mac_addr_remove,
 934         .mac_addr_set            = virtio_mac_addr_set,
 935 };
 936
 937 /*
 938  * dev_ops for virtio-user in secondary processes, as we just have
 939  * some limited supports currently.
 940  */
 941 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 942         .dev_infos_get           = virtio_dev_info_get,
 943         .stats_get               = virtio_dev_stats_get,
 944         .xstats_get              = virtio_dev_xstats_get,
 945         .xstats_get_names        = virtio_dev_xstats_get_names,
 946         .stats_reset             = virtio_dev_stats_reset,
 947         .xstats_reset            = virtio_dev_stats_reset,
 948         /* collect stats per queue */
 949         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 950 };
 951
 952 static void
 953 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 954 {
 955         unsigned i;
 956
 957         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 958                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 959                 if (txvq == NULL)
 960                         continue;
 961
 962                 stats->opackets += txvq->stats.packets;
 963                 stats->obytes += txvq->stats.bytes;
 964
 965                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 966                         stats->q_opackets[i] = txvq->stats.packets;
 967                         stats->q_obytes[i] = txvq->stats.bytes;
 968                 }
 969         }
 970
 971         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 972                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 973                 if (rxvq == NULL)
 974                         continue;
 975
 976                 stats->ipackets += rxvq->stats.packets;
 977                 stats->ibytes += rxvq->stats.bytes;
 978                 stats->ierrors += rxvq->stats.errors;
 979
 980                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 981                         stats->q_ipackets[i] = rxvq->stats.packets;
 982                         stats->q_ibytes[i] = rxvq->stats.bytes;
 983                 }
 984         }
 985
 986         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 987 }
 988
 989 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 990                                        struct rte_eth_xstat_name *xstats_names,
 991                                        __rte_unused unsigned limit)
 992 {
 993         unsigned i;
 994         unsigned count = 0;
 995         unsigned t;
 996
 997         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 998                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 999
1000         if (xstats_names != NULL) {
1001                 /* Note: limit checked in rte_eth_xstats_names() */
1002
1003                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1004                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1005                         if (rxvq == NULL)
1006                                 continue;
1007                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1008                                 snprintf(xstats_names[count].name,
1009                                         sizeof(xstats_names[count].name),
1010                                         "rx_q%u_%s", i,
1011                                         rte_virtio_rxq_stat_strings[t].name);
1012                                 count++;
1013                         }
1014                 }
1015
1016                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1017                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1018                         if (txvq == NULL)
1019                                 continue;
1020                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1021                                 snprintf(xstats_names[count].name,
1022                                         sizeof(xstats_names[count].name),
1023                                         "tx_q%u_%s", i,
1024                                         rte_virtio_txq_stat_strings[t].name);
1025                                 count++;
1026                         }
1027                 }
1028                 return count;
1029         }
1030         return nstats;
1031 }
1032
1033 static int
1034 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1035                       unsigned n)
1036 {
1037         unsigned i;
1038         unsigned count = 0;
1039
1040         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1041                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1042
1043         if (n < nstats)
1044                 return nstats;
1045
1046         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1047                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1048
1049                 if (rxvq == NULL)
1050                         continue;
1051
1052                 unsigned t;
1053
1054                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1055                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1056                                 rte_virtio_rxq_stat_strings[t].offset);
1057                         xstats[count].id = count;
1058                         count++;
1059                 }
1060         }
1061
1062         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1063                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1064
1065                 if (txvq == NULL)
1066                         continue;
1067
1068                 unsigned t;
1069
1070                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1071                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1072                                 rte_virtio_txq_stat_strings[t].offset);
1073                         xstats[count].id = count;
1074                         count++;
1075                 }
1076         }
1077
1078         return count;
1079 }
1080
1081 static int
1082 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1083 {
1084         virtio_update_stats(dev, stats);
1085
1086         return 0;
1087 }
1088
1089 static int
1090 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1091 {
1092         unsigned int i;
1093
1094         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1095                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1096                 if (txvq == NULL)
1097                         continue;
1098
1099                 txvq->stats.packets = 0;
1100                 txvq->stats.bytes = 0;
1101                 txvq->stats.multicast = 0;
1102                 txvq->stats.broadcast = 0;
1103                 memset(txvq->stats.size_bins, 0,
1104                        sizeof(txvq->stats.size_bins[0]) * 8);
1105         }
1106
1107         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1108                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1109                 if (rxvq == NULL)
1110                         continue;
1111
1112                 rxvq->stats.packets = 0;
1113                 rxvq->stats.bytes = 0;
1114                 rxvq->stats.errors = 0;
1115                 rxvq->stats.multicast = 0;
1116                 rxvq->stats.broadcast = 0;
1117                 memset(rxvq->stats.size_bins, 0,
1118                        sizeof(rxvq->stats.size_bins[0]) * 8);
1119         }
1120
1121         return 0;
1122 }
1123
1124 static void
1125 virtio_set_hwaddr(struct virtio_hw *hw)
1126 {
1127         vtpci_write_dev_config(hw,
1128                         offsetof(struct virtio_net_config, mac),
1129                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1130 }
1131
1132 static void
1133 virtio_get_hwaddr(struct virtio_hw *hw)
1134 {
1135         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1136                 vtpci_read_dev_config(hw,
1137                         offsetof(struct virtio_net_config, mac),
1138                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1139         } else {
1140                 rte_eth_random_addr(&hw->mac_addr[0]);
1141                 virtio_set_hwaddr(hw);
1142         }
1143 }
1144
1145 static int
1146 virtio_mac_table_set(struct virtio_hw *hw,
1147                      const struct virtio_net_ctrl_mac *uc,
1148                      const struct virtio_net_ctrl_mac *mc)
1149 {
1150         struct virtio_pmd_ctrl ctrl;
1151         int err, len[2];
1152
1153         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1154                 PMD_DRV_LOG(INFO, "host does not support mac table");
1155                 return -1;
1156         }
1157
1158         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1159         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1160
1161         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1162         memcpy(ctrl.data, uc, len[0]);
1163
1164         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1165         memcpy(ctrl.data + len[0], mc, len[1]);
1166
1167         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1168         if (err != 0)
1169                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1170         return err;
1171 }
1172
1173 static int
1174 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1175                     uint32_t index, uint32_t vmdq __rte_unused)
1176 {
1177         struct virtio_hw *hw = dev->data->dev_private;
1178         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1179         unsigned int i;
1180         struct virtio_net_ctrl_mac *uc, *mc;
1181
1182         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1183                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1184                 return -EINVAL;
1185         }
1186
1187         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1188                 sizeof(uc->entries));
1189         uc->entries = 0;
1190         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1191                 sizeof(mc->entries));
1192         mc->entries = 0;
1193
1194         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1195                 const struct rte_ether_addr *addr
1196                         = (i == index) ? mac_addr : addrs + i;
1197                 struct virtio_net_ctrl_mac *tbl
1198                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1199
1200                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1201         }
1202
1203         return virtio_mac_table_set(hw, uc, mc);
1204 }
1205
1206 static void
1207 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1208 {
1209         struct virtio_hw *hw = dev->data->dev_private;
1210         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1211         struct virtio_net_ctrl_mac *uc, *mc;
1212         unsigned int i;
1213
1214         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1215                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1216                 return;
1217         }
1218
1219         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1220                 sizeof(uc->entries));
1221         uc->entries = 0;
1222         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1223                 sizeof(mc->entries));
1224         mc->entries = 0;
1225
1226         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1227                 struct virtio_net_ctrl_mac *tbl;
1228
1229                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1230                         continue;
1231
1232                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1233                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1234                         RTE_ETHER_ADDR_LEN);
1235         }
1236
1237         virtio_mac_table_set(hw, uc, mc);
1238 }
1239
1240 static int
1241 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1242 {
1243         struct virtio_hw *hw = dev->data->dev_private;
1244
1245         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1246
1247         /* Use atomic update if available */
1248         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1249                 struct virtio_pmd_ctrl ctrl;
1250                 int len = RTE_ETHER_ADDR_LEN;
1251
1252                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1253                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1254
1255                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1256                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1257         }
1258
1259         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1260                 return -ENOTSUP;
1261
1262         virtio_set_hwaddr(hw);
1263         return 0;
1264 }
1265
1266 static int
1267 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1268 {
1269         struct virtio_hw *hw = dev->data->dev_private;
1270         struct virtio_pmd_ctrl ctrl;
1271         int len;
1272
1273         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1274                 return -ENOTSUP;
1275
1276         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1277         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1278         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1279         len = sizeof(vlan_id);
1280
1281         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1282 }
1283
1284 static int
1285 virtio_intr_unmask(struct rte_eth_dev *dev)
1286 {
1287         struct virtio_hw *hw = dev->data->dev_private;
1288
1289         if (rte_intr_ack(dev->intr_handle) < 0)
1290                 return -1;
1291
1292         if (!hw->virtio_user_dev)
1293                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1294
1295         return 0;
1296 }
1297
1298 static int
1299 virtio_intr_enable(struct rte_eth_dev *dev)
1300 {
1301         struct virtio_hw *hw = dev->data->dev_private;
1302
1303         if (rte_intr_enable(dev->intr_handle) < 0)
1304                 return -1;
1305
1306         if (!hw->virtio_user_dev)
1307                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1308
1309         return 0;
1310 }
1311
1312 static int
1313 virtio_intr_disable(struct rte_eth_dev *dev)
1314 {
1315         struct virtio_hw *hw = dev->data->dev_private;
1316
1317         if (rte_intr_disable(dev->intr_handle) < 0)
1318                 return -1;
1319
1320         if (!hw->virtio_user_dev)
1321                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1322
1323         return 0;
1324 }
1325
1326 static int
1327 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1328 {
1329         uint64_t host_features;
1330
1331         /* Prepare guest_features: feature that driver wants to support */
1332         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1333                 req_features);
1334
1335         /* Read device(host) feature bits */
1336         host_features = VTPCI_OPS(hw)->get_features(hw);
1337         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1338                 host_features);
1339
1340         /* If supported, ensure MTU value is valid before acknowledging it. */
1341         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1342                 struct virtio_net_config config;
1343
1344                 vtpci_read_dev_config(hw,
1345                         offsetof(struct virtio_net_config, mtu),
1346                         &config.mtu, sizeof(config.mtu));
1347
1348                 if (config.mtu < RTE_ETHER_MIN_MTU)
1349                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1350         }
1351
1352         /*
1353          * Negotiate features: Subset of device feature bits are written back
1354          * guest feature bits.
1355          */
1356         hw->guest_features = req_features;
1357         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1358         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1359                 hw->guest_features);
1360
1361         if (hw->modern && !vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1362                 PMD_INIT_LOG(ERR,
1363                         "VIRTIO_F_VERSION_1 features is not enabled.");
1364                 return -1;
1365         }
1366
1367         if (hw->modern || hw->virtio_user_dev) {
1368                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1369                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1370                         PMD_INIT_LOG(ERR,
1371                                 "failed to set FEATURES_OK status!");
1372                         return -1;
1373                 }
1374         }
1375
1376         hw->req_guest_features = req_features;
1377
1378         return 0;
1379 }
1380
1381 int
1382 virtio_dev_pause(struct rte_eth_dev *dev)
1383 {
1384         struct virtio_hw *hw = dev->data->dev_private;
1385
1386         rte_spinlock_lock(&hw->state_lock);
1387
1388         if (hw->started == 0) {
1389                 /* Device is just stopped. */
1390                 rte_spinlock_unlock(&hw->state_lock);
1391                 return -1;
1392         }
1393         hw->started = 0;
1394         /*
1395          * Prevent the worker threads from touching queues to avoid contention,
1396          * 1 ms should be enough for the ongoing Tx function to finish.
1397          */
1398         rte_delay_ms(1);
1399         return 0;
1400 }
1401
1402 /*
1403  * Recover hw state to let the worker threads continue.
1404  */
1405 void
1406 virtio_dev_resume(struct rte_eth_dev *dev)
1407 {
1408         struct virtio_hw *hw = dev->data->dev_private;
1409
1410         hw->started = 1;
1411         rte_spinlock_unlock(&hw->state_lock);
1412 }
1413
1414 /*
1415  * Should be called only after device is paused.
1416  */
1417 int
1418 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1419                 int nb_pkts)
1420 {
1421         struct virtio_hw *hw = dev->data->dev_private;
1422         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1423         int ret;
1424
1425         hw->inject_pkts = tx_pkts;
1426         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1427         hw->inject_pkts = NULL;
1428
1429         return ret;
1430 }
1431
1432 static void
1433 virtio_notify_peers(struct rte_eth_dev *dev)
1434 {
1435         struct virtio_hw *hw = dev->data->dev_private;
1436         struct virtnet_rx *rxvq;
1437         struct rte_mbuf *rarp_mbuf;
1438
1439         if (!dev->data->rx_queues)
1440                 return;
1441
1442         rxvq = dev->data->rx_queues[0];
1443         if (!rxvq)
1444                 return;
1445
1446         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1447                         (struct rte_ether_addr *)hw->mac_addr);
1448         if (rarp_mbuf == NULL) {
1449                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1450                 return;
1451         }
1452
1453         /* If virtio port just stopped, no need to send RARP */
1454         if (virtio_dev_pause(dev) < 0) {
1455                 rte_pktmbuf_free(rarp_mbuf);
1456                 return;
1457         }
1458
1459         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1460         virtio_dev_resume(dev);
1461 }
1462
1463 static void
1464 virtio_ack_link_announce(struct rte_eth_dev *dev)
1465 {
1466         struct virtio_hw *hw = dev->data->dev_private;
1467         struct virtio_pmd_ctrl ctrl;
1468
1469         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1470         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1471
1472         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1473 }
1474
1475 /*
1476  * Process virtio config changed interrupt. Call the callback
1477  * if link state changed, generate gratuitous RARP packet if
1478  * the status indicates an ANNOUNCE.
1479  */
1480 void
1481 virtio_interrupt_handler(void *param)
1482 {
1483         struct rte_eth_dev *dev = param;
1484         struct virtio_hw *hw = dev->data->dev_private;
1485         uint8_t isr;
1486         uint16_t status;
1487
1488         /* Read interrupt status which clears interrupt */
1489         isr = vtpci_isr(hw);
1490         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1491
1492         if (virtio_intr_unmask(dev) < 0)
1493                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1494
1495         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1496                 if (virtio_dev_link_update(dev, 0) == 0)
1497                         rte_eth_dev_callback_process(dev,
1498                                                      RTE_ETH_EVENT_INTR_LSC,
1499                                                      NULL);
1500
1501                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1502                         vtpci_read_dev_config(hw,
1503                                 offsetof(struct virtio_net_config, status),
1504                                 &status, sizeof(status));
1505                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1506                                 virtio_notify_peers(dev);
1507                                 if (hw->cvq)
1508                                         virtio_ack_link_announce(dev);
1509                         }
1510                 }
1511         }
1512 }
1513
1514 /* set rx and tx handlers according to what is supported */
1515 static void
1516 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1517 {
1518         struct virtio_hw *hw = eth_dev->data->dev_private;
1519
1520         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1521         if (vtpci_packed_queue(hw)) {
1522                 PMD_INIT_LOG(INFO,
1523                         "virtio: using packed ring %s Tx path on port %u",
1524                         hw->use_vec_tx ? "vectorized" : "standard",
1525                         eth_dev->data->port_id);
1526                 if (hw->use_vec_tx)
1527                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed_vec;
1528                 else
1529                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1530         } else {
1531                 if (hw->use_inorder_tx) {
1532                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1533                                 eth_dev->data->port_id);
1534                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1535                 } else {
1536                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1537                                 eth_dev->data->port_id);
1538                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1539                 }
1540         }
1541
1542         if (vtpci_packed_queue(hw)) {
1543                 if (hw->use_vec_rx) {
1544                         PMD_INIT_LOG(INFO,
1545                                 "virtio: using packed ring vectorized Rx path on port %u",
1546                                 eth_dev->data->port_id);
1547                         eth_dev->rx_pkt_burst =
1548                                 &virtio_recv_pkts_packed_vec;
1549                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1550                         PMD_INIT_LOG(INFO,
1551                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1552                                 eth_dev->data->port_id);
1553                         eth_dev->rx_pkt_burst =
1554                                 &virtio_recv_mergeable_pkts_packed;
1555                 } else {
1556                         PMD_INIT_LOG(INFO,
1557                                 "virtio: using packed ring standard Rx path on port %u",
1558                                 eth_dev->data->port_id);
1559                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1560                 }
1561         } else {
1562                 if (hw->use_vec_rx) {
1563                         PMD_INIT_LOG(INFO, "virtio: using vectorized Rx path on port %u",
1564                                 eth_dev->data->port_id);
1565                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1566                 } else if (hw->use_inorder_rx) {
1567                         PMD_INIT_LOG(INFO,
1568                                 "virtio: using inorder Rx path on port %u",
1569                                 eth_dev->data->port_id);
1570                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1571                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1572                         PMD_INIT_LOG(INFO,
1573                                 "virtio: using mergeable buffer Rx path on port %u",
1574                                 eth_dev->data->port_id);
1575                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1576                 } else {
1577                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1578                                 eth_dev->data->port_id);
1579                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1580                 }
1581         }
1582
1583 }
1584
1585 /* Only support 1:1 queue/interrupt mapping so far.
1586  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1587  * interrupt vectors (<N+1).
1588  */
1589 static int
1590 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1591 {
1592         uint32_t i;
1593         struct virtio_hw *hw = dev->data->dev_private;
1594
1595         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1596         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1597                 dev->intr_handle->intr_vec[i] = i + 1;
1598                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1599                                                  VIRTIO_MSI_NO_VECTOR) {
1600                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1601                         return -EBUSY;
1602                 }
1603         }
1604
1605         return 0;
1606 }
1607
1608 static void
1609 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1610 {
1611         uint32_t i;
1612         struct virtio_hw *hw = dev->data->dev_private;
1613
1614         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1615         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1616                 VTPCI_OPS(hw)->set_queue_irq(hw,
1617                                              hw->vqs[i * VTNET_CQ],
1618                                              VIRTIO_MSI_NO_VECTOR);
1619 }
1620
1621 static int
1622 virtio_configure_intr(struct rte_eth_dev *dev)
1623 {
1624         struct virtio_hw *hw = dev->data->dev_private;
1625
1626         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1627                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1628                 return -ENOTSUP;
1629         }
1630
1631         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1632                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1633                 return -1;
1634         }
1635
1636         if (!dev->intr_handle->intr_vec) {
1637                 dev->intr_handle->intr_vec =
1638                         rte_zmalloc("intr_vec",
1639                                     hw->max_queue_pairs * sizeof(int), 0);
1640                 if (!dev->intr_handle->intr_vec) {
1641                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1642                                      hw->max_queue_pairs);
1643                         return -ENOMEM;
1644                 }
1645         }
1646
1647         /* Re-register callback to update max_intr */
1648         rte_intr_callback_unregister(dev->intr_handle,
1649                                      virtio_interrupt_handler,
1650                                      dev);
1651         rte_intr_callback_register(dev->intr_handle,
1652                                    virtio_interrupt_handler,
1653                                    dev);
1654
1655         /* DO NOT try to remove this! This function will enable msix, or QEMU
1656          * will encounter SIGSEGV when DRIVER_OK is sent.
1657          * And for legacy devices, this should be done before queue/vec binding
1658          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1659          * (22) will be ignored.
1660          */
1661         if (virtio_intr_enable(dev) < 0) {
1662                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1663                 return -1;
1664         }
1665
1666         if (virtio_queues_bind_intr(dev) < 0) {
1667                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1668                 return -1;
1669         }
1670
1671         return 0;
1672 }
1673 #define DUPLEX_UNKNOWN   0xff
1674 /* reset device and renegotiate features if needed */
1675 static int
1676 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1677 {
1678         struct virtio_hw *hw = eth_dev->data->dev_private;
1679         struct virtio_net_config *config;
1680         struct virtio_net_config local_config;
1681         struct rte_pci_device *pci_dev = NULL;
1682         int ret;
1683
1684         /* Reset the device although not necessary at startup */
1685         vtpci_reset(hw);
1686
1687         if (hw->vqs) {
1688                 virtio_dev_free_mbufs(eth_dev);
1689                 virtio_free_queues(hw);
1690         }
1691
1692         /* Tell the host we've noticed this device. */
1693         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1694
1695         /* Tell the host we've known how to drive the device. */
1696         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1697         if (virtio_negotiate_features(hw, req_features) < 0)
1698                 return -1;
1699
1700         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1701
1702         if (!hw->virtio_user_dev)
1703                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1704
1705         /* If host does not support both status and MSI-X then disable LSC */
1706         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1707             hw->use_msix != VIRTIO_MSIX_NONE)
1708                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1709         else
1710                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1711
1712         /* Setting up rx_header size for the device */
1713         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1714             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1715             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1716                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1717         else
1718                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1719
1720         /* Copy the permanent MAC address to: virtio_hw */
1721         virtio_get_hwaddr(hw);
1722         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1723                         &eth_dev->data->mac_addrs[0]);
1724         PMD_INIT_LOG(DEBUG,
1725                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1726                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1727                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1728
1729         if (hw->speed == ETH_SPEED_NUM_UNKNOWN) {
1730                 if (vtpci_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) {
1731                         config = &local_config;
1732                         vtpci_read_dev_config(hw,
1733                                 offsetof(struct virtio_net_config, speed),
1734                                 &config->speed, sizeof(config->speed));
1735                         vtpci_read_dev_config(hw,
1736                                 offsetof(struct virtio_net_config, duplex),
1737                                 &config->duplex, sizeof(config->duplex));
1738                         hw->speed = config->speed;
1739                         hw->duplex = config->duplex;
1740                 }
1741         }
1742         if (hw->duplex == DUPLEX_UNKNOWN)
1743                 hw->duplex = ETH_LINK_FULL_DUPLEX;
1744         PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d",
1745                 hw->speed, hw->duplex);
1746         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1747                 config = &local_config;
1748
1749                 vtpci_read_dev_config(hw,
1750                         offsetof(struct virtio_net_config, mac),
1751                         &config->mac, sizeof(config->mac));
1752
1753                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1754                         vtpci_read_dev_config(hw,
1755                                 offsetof(struct virtio_net_config, status),
1756                                 &config->status, sizeof(config->status));
1757                 } else {
1758                         PMD_INIT_LOG(DEBUG,
1759                                      "VIRTIO_NET_F_STATUS is not supported");
1760                         config->status = 0;
1761                 }
1762
1763                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1764                         vtpci_read_dev_config(hw,
1765                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1766                                 &config->max_virtqueue_pairs,
1767                                 sizeof(config->max_virtqueue_pairs));
1768                 } else {
1769                         PMD_INIT_LOG(DEBUG,
1770                                      "VIRTIO_NET_F_MQ is not supported");
1771                         config->max_virtqueue_pairs = 1;
1772                 }
1773
1774                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1775
1776                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1777                         vtpci_read_dev_config(hw,
1778                                 offsetof(struct virtio_net_config, mtu),
1779                                 &config->mtu,
1780                                 sizeof(config->mtu));
1781
1782                         /*
1783                          * MTU value has already been checked at negotiation
1784                          * time, but check again in case it has changed since
1785                          * then, which should not happen.
1786                          */
1787                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1788                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1789                                                 config->mtu);
1790                                 return -1;
1791                         }
1792
1793                         hw->max_mtu = config->mtu;
1794                         /* Set initial MTU to maximum one supported by vhost */
1795                         eth_dev->data->mtu = config->mtu;
1796
1797                 } else {
1798                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1799                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1800                 }
1801
1802                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1803                                 config->max_virtqueue_pairs);
1804                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1805                 PMD_INIT_LOG(DEBUG,
1806                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1807                                 config->mac[0], config->mac[1],
1808                                 config->mac[2], config->mac[3],
1809                                 config->mac[4], config->mac[5]);
1810         } else {
1811                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1812                 hw->max_queue_pairs = 1;
1813                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1814                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1815         }
1816
1817         ret = virtio_alloc_queues(eth_dev);
1818         if (ret < 0)
1819                 return ret;
1820
1821         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1822                 if (virtio_configure_intr(eth_dev) < 0) {
1823                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1824                         virtio_free_queues(hw);
1825                         return -1;
1826                 }
1827         }
1828
1829         vtpci_reinit_complete(hw);
1830
1831         if (pci_dev)
1832                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1833                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1834                         pci_dev->id.device_id);
1835
1836         return 0;
1837 }
1838
1839 /*
1840  * Remap the PCI device again (IO port map for legacy device and
1841  * memory map for modern device), so that the secondary process
1842  * could have the PCI initiated correctly.
1843  */
1844 static int
1845 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1846 {
1847         if (hw->modern) {
1848                 /*
1849                  * We don't have to re-parse the PCI config space, since
1850                  * rte_pci_map_device() makes sure the mapped address
1851                  * in secondary process would equal to the one mapped in
1852                  * the primary process: error will be returned if that
1853                  * requirement is not met.
1854                  *
1855                  * That said, we could simply reuse all cap pointers
1856                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1857                  * primary process, which is stored in shared memory.
1858                  */
1859                 if (rte_pci_map_device(pci_dev)) {
1860                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1861                         return -1;
1862                 }
1863         } else {
1864                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1865                         return -1;
1866         }
1867
1868         return 0;
1869 }
1870
1871 static void
1872 virtio_set_vtpci_ops(struct virtio_hw *hw)
1873 {
1874 #ifdef RTE_VIRTIO_USER
1875         if (hw->virtio_user_dev)
1876                 VTPCI_OPS(hw) = &virtio_user_ops;
1877         else
1878 #endif
1879         if (hw->modern)
1880                 VTPCI_OPS(hw) = &modern_ops;
1881         else
1882                 VTPCI_OPS(hw) = &legacy_ops;
1883 }
1884
1885 /*
1886  * This function is based on probe() function in virtio_pci.c
1887  * It returns 0 on success.
1888  */
1889 int
1890 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1891 {
1892         struct virtio_hw *hw = eth_dev->data->dev_private;
1893         uint32_t speed = ETH_SPEED_NUM_UNKNOWN;
1894         int vectorized = 0;
1895         int ret;
1896
1897         if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1898                 PMD_INIT_LOG(ERR,
1899                         "Not sufficient headroom required = %d, avail = %d",
1900                         (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1901                         RTE_PKTMBUF_HEADROOM);
1902
1903                 return -1;
1904         }
1905
1906         eth_dev->dev_ops = &virtio_eth_dev_ops;
1907         eth_dev->rx_descriptor_done = virtio_dev_rx_queue_done;
1908
1909         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1910                 if (!hw->virtio_user_dev) {
1911                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1912                         if (ret)
1913                                 return ret;
1914                 }
1915
1916                 virtio_set_vtpci_ops(hw);
1917                 set_rxtx_funcs(eth_dev);
1918
1919                 return 0;
1920         }
1921         ret = virtio_dev_devargs_parse(eth_dev->device->devargs,
1922                  NULL, &speed, &vectorized);
1923         if (ret < 0)
1924                 return ret;
1925         hw->speed = speed;
1926
1927         /* Allocate memory for storing MAC addresses */
1928         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1929                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1930         if (eth_dev->data->mac_addrs == NULL) {
1931                 PMD_INIT_LOG(ERR,
1932                         "Failed to allocate %d bytes needed to store MAC addresses",
1933                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1934                 return -ENOMEM;
1935         }
1936
1937         hw->port_id = eth_dev->data->port_id;
1938         /* For virtio_user case the hw->virtio_user_dev is populated by
1939          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1940          */
1941         if (!hw->virtio_user_dev) {
1942                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1943                 if (ret)
1944                         goto err_vtpci_init;
1945         }
1946
1947         rte_spinlock_init(&hw->state_lock);
1948
1949         /* reset device and negotiate default features */
1950         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1951         if (ret < 0)
1952                 goto err_virtio_init;
1953
1954         if (vectorized) {
1955                 if (!vtpci_packed_queue(hw)) {
1956                         hw->use_vec_rx = 1;
1957                 } else {
1958 #if !defined(CC_AVX512_SUPPORT)
1959                         PMD_DRV_LOG(INFO,
1960                                 "building environment do not support packed ring vectorized");
1961 #else
1962                         hw->use_vec_rx = 1;
1963                         hw->use_vec_tx = 1;
1964 #endif
1965                 }
1966         }
1967
1968         hw->opened = true;
1969
1970         return 0;
1971
1972 err_virtio_init:
1973         if (!hw->virtio_user_dev) {
1974                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1975                 if (!hw->modern)
1976                         rte_pci_ioport_unmap(VTPCI_IO(hw));
1977         }
1978 err_vtpci_init:
1979         rte_free(eth_dev->data->mac_addrs);
1980         eth_dev->data->mac_addrs = NULL;
1981         return ret;
1982 }
1983
1984 static int
1985 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1986 {
1987         PMD_INIT_FUNC_TRACE();
1988
1989         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1990                 return 0;
1991
1992         virtio_dev_stop(eth_dev);
1993         virtio_dev_close(eth_dev);
1994
1995         eth_dev->dev_ops = NULL;
1996         eth_dev->tx_pkt_burst = NULL;
1997         eth_dev->rx_pkt_burst = NULL;
1998
1999         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
2000
2001         return 0;
2002 }
2003
2004
2005 static int vdpa_check_handler(__rte_unused const char *key,
2006                 const char *value, void *ret_val)
2007 {
2008         if (strcmp(value, "1") == 0)
2009                 *(int *)ret_val = 1;
2010         else
2011                 *(int *)ret_val = 0;
2012
2013         return 0;
2014 }
2015
2016
2017 static uint32_t
2018 virtio_dev_speed_capa_get(uint32_t speed)
2019 {
2020         switch (speed) {
2021         case ETH_SPEED_NUM_10G:
2022                 return ETH_LINK_SPEED_10G;
2023         case ETH_SPEED_NUM_20G:
2024                 return ETH_LINK_SPEED_20G;
2025         case ETH_SPEED_NUM_25G:
2026                 return ETH_LINK_SPEED_25G;
2027         case ETH_SPEED_NUM_40G:
2028                 return ETH_LINK_SPEED_40G;
2029         case ETH_SPEED_NUM_50G:
2030                 return ETH_LINK_SPEED_50G;
2031         case ETH_SPEED_NUM_56G:
2032                 return ETH_LINK_SPEED_56G;
2033         case ETH_SPEED_NUM_100G:
2034                 return ETH_LINK_SPEED_100G;
2035         case ETH_SPEED_NUM_200G:
2036                 return ETH_LINK_SPEED_200G;
2037         default:
2038                 return 0;
2039         }
2040 }
2041
2042 static int vectorized_check_handler(__rte_unused const char *key,
2043                 const char *value, void *ret_val)
2044 {
2045         if (strcmp(value, "1") == 0)
2046                 *(int *)ret_val = 1;
2047         else
2048                 *(int *)ret_val = 0;
2049
2050         return 0;
2051 }
2052
2053 #define VIRTIO_ARG_SPEED      "speed"
2054 #define VIRTIO_ARG_VDPA       "vdpa"
2055 #define VIRTIO_ARG_VECTORIZED "vectorized"
2056
2057
2058 static int
2059 link_speed_handler(const char *key __rte_unused,
2060                 const char *value, void *ret_val)
2061 {
2062         uint32_t val;
2063         if (!value || !ret_val)
2064                 return -EINVAL;
2065         val = strtoul(value, NULL, 0);
2066         /* validate input */
2067         if (virtio_dev_speed_capa_get(val) == 0)
2068                 return -EINVAL;
2069         *(uint32_t *)ret_val = val;
2070
2071         return 0;
2072 }
2073
2074
2075 static int
2076 virtio_dev_devargs_parse(struct rte_devargs *devargs, int *vdpa,
2077         uint32_t *speed, int *vectorized)
2078 {
2079         struct rte_kvargs *kvlist;
2080         int ret = 0;
2081
2082         if (devargs == NULL)
2083                 return 0;
2084
2085         kvlist = rte_kvargs_parse(devargs->args, NULL);
2086         if (kvlist == NULL) {
2087                 PMD_INIT_LOG(ERR, "error when parsing param");
2088                 return 0;
2089         }
2090         if (vdpa && rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) {
2091                 /* vdpa mode selected when there's a key-value pair:
2092                  * vdpa=1
2093                  */
2094                 ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA,
2095                                 vdpa_check_handler, vdpa);
2096                 if (ret < 0) {
2097                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2098                                 VIRTIO_ARG_VDPA);
2099                         goto exit;
2100                 }
2101         }
2102         if (speed && rte_kvargs_count(kvlist, VIRTIO_ARG_SPEED) == 1) {
2103                 ret = rte_kvargs_process(kvlist,
2104                                         VIRTIO_ARG_SPEED,
2105                                         link_speed_handler, speed);
2106                 if (ret < 0) {
2107                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2108                                         VIRTIO_ARG_SPEED);
2109                         goto exit;
2110                 }
2111         }
2112
2113         if (vectorized &&
2114                 rte_kvargs_count(kvlist, VIRTIO_ARG_VECTORIZED) == 1) {
2115                 ret = rte_kvargs_process(kvlist,
2116                                 VIRTIO_ARG_VECTORIZED,
2117                                 vectorized_check_handler, vectorized);
2118                 if (ret < 0) {
2119                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2120                                         VIRTIO_ARG_VECTORIZED);
2121                         goto exit;
2122                 }
2123         }
2124
2125 exit:
2126         rte_kvargs_free(kvlist);
2127         return ret;
2128 }
2129
2130 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
2131         struct rte_pci_device *pci_dev)
2132 {
2133         int vdpa = 0;
2134         int ret = 0;
2135
2136         ret = virtio_dev_devargs_parse(pci_dev->device.devargs, &vdpa, NULL,
2137                 NULL);
2138         if (ret < 0) {
2139                 PMD_INIT_LOG(ERR, "devargs parsing is failed");
2140                 return ret;
2141         }
2142         /* virtio pmd skips probe if device needs to work in vdpa mode */
2143         if (vdpa == 1)
2144                 return 1;
2145
2146         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
2147                 eth_virtio_dev_init);
2148 }
2149
2150 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
2151 {
2152         int ret;
2153
2154         ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
2155         /* Port has already been released by close. */
2156         if (ret == -ENODEV)
2157                 ret = 0;
2158         return ret;
2159 }
2160
2161 static struct rte_pci_driver rte_virtio_pmd = {
2162         .driver = {
2163                 .name = "net_virtio",
2164         },
2165         .id_table = pci_id_virtio_map,
2166         .drv_flags = 0,
2167         .probe = eth_virtio_pci_probe,
2168         .remove = eth_virtio_pci_remove,
2169 };
2170
2171 RTE_INIT(rte_virtio_pmd_init)
2172 {
2173         rte_eal_iopl_init();
2174         rte_pci_register(&rte_virtio_pmd);
2175 }
2176
2177 static bool
2178 rx_offload_enabled(struct virtio_hw *hw)
2179 {
2180         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2181                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2182                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2183 }
2184
2185 static bool
2186 tx_offload_enabled(struct virtio_hw *hw)
2187 {
2188         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2189                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2190                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2191 }
2192
2193 /*
2194  * Configure virtio device
2195  * It returns 0 on success.
2196  */
2197 static int
2198 virtio_dev_configure(struct rte_eth_dev *dev)
2199 {
2200         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2201         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2202         struct virtio_hw *hw = dev->data->dev_private;
2203         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2204                 hw->vtnet_hdr_size;
2205         uint64_t rx_offloads = rxmode->offloads;
2206         uint64_t tx_offloads = txmode->offloads;
2207         uint64_t req_features;
2208         int ret;
2209
2210         PMD_INIT_LOG(DEBUG, "configure");
2211         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2212
2213         if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2214                 PMD_DRV_LOG(ERR,
2215                         "Unsupported Rx multi queue mode %d",
2216                         rxmode->mq_mode);
2217                 return -EINVAL;
2218         }
2219
2220         if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2221                 PMD_DRV_LOG(ERR,
2222                         "Unsupported Tx multi queue mode %d",
2223                         txmode->mq_mode);
2224                 return -EINVAL;
2225         }
2226
2227         if (dev->data->dev_conf.intr_conf.rxq) {
2228                 ret = virtio_init_device(dev, hw->req_guest_features);
2229                 if (ret < 0)
2230                         return ret;
2231         }
2232
2233         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2234                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2235
2236         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2237                            DEV_RX_OFFLOAD_TCP_CKSUM))
2238                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2239
2240         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2241                 req_features |=
2242                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2243                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2244
2245         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2246                            DEV_TX_OFFLOAD_TCP_CKSUM))
2247                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2248
2249         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2250                 req_features |=
2251                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2252                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2253
2254         /* if request features changed, reinit the device */
2255         if (req_features != hw->req_guest_features) {
2256                 ret = virtio_init_device(dev, req_features);
2257                 if (ret < 0)
2258                         return ret;
2259         }
2260
2261         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2262                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2263                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2264                 PMD_DRV_LOG(ERR,
2265                         "rx checksum not available on this host");
2266                 return -ENOTSUP;
2267         }
2268
2269         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2270                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2271                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2272                 PMD_DRV_LOG(ERR,
2273                         "Large Receive Offload not available on this host");
2274                 return -ENOTSUP;
2275         }
2276
2277         /* start control queue */
2278         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2279                 virtio_dev_cq_start(dev);
2280
2281         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2282                 hw->vlan_strip = 1;
2283
2284         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2285             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2286                 PMD_DRV_LOG(ERR,
2287                             "vlan filtering not available on this host");
2288                 return -ENOTSUP;
2289         }
2290
2291         hw->has_tx_offload = tx_offload_enabled(hw);
2292         hw->has_rx_offload = rx_offload_enabled(hw);
2293
2294         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2295                 /* Enable vector (0) for Link State Intrerrupt */
2296                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2297                                 VIRTIO_MSI_NO_VECTOR) {
2298                         PMD_DRV_LOG(ERR, "failed to set config vector");
2299                         return -EBUSY;
2300                 }
2301
2302         if (vtpci_packed_queue(hw)) {
2303 #if defined(RTE_ARCH_X86_64) && defined(CC_AVX512_SUPPORT)
2304                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2305                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
2306                      !vtpci_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2307                      !vtpci_with_feature(hw, VIRTIO_F_VERSION_1))) {
2308                         PMD_DRV_LOG(INFO,
2309                                 "disabled packed ring vectorized path for requirements not met");
2310                         hw->use_vec_rx = 0;
2311                         hw->use_vec_tx = 0;
2312                 }
2313 #else
2314                 hw->use_vec_rx = 0;
2315                 hw->use_vec_tx = 0;
2316 #endif
2317
2318                 if (hw->use_vec_rx) {
2319                         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2320                                 PMD_DRV_LOG(INFO,
2321                                         "disabled packed ring vectorized rx for mrg_rxbuf enabled");
2322                                 hw->use_vec_rx = 0;
2323                         }
2324
2325                         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) {
2326                                 PMD_DRV_LOG(INFO,
2327                                         "disabled packed ring vectorized rx for TCP_LRO enabled");
2328                                 hw->use_vec_rx = 0;
2329                         }
2330                 }
2331         } else {
2332                 if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2333                         hw->use_inorder_tx = 1;
2334                         hw->use_inorder_rx = 1;
2335                         hw->use_vec_rx = 0;
2336                 }
2337
2338                 if (hw->use_vec_rx) {
2339 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
2340                         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2341                                 PMD_DRV_LOG(INFO,
2342                                         "disabled split ring vectorized path for requirement not met");
2343                                 hw->use_vec_rx = 0;
2344                         }
2345 #endif
2346                         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2347                                 PMD_DRV_LOG(INFO,
2348                                         "disabled split ring vectorized rx for mrg_rxbuf enabled");
2349                                 hw->use_vec_rx = 0;
2350                         }
2351
2352                         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2353                                            DEV_RX_OFFLOAD_TCP_CKSUM |
2354                                            DEV_RX_OFFLOAD_TCP_LRO |
2355                                            DEV_RX_OFFLOAD_VLAN_STRIP)) {
2356                                 PMD_DRV_LOG(INFO,
2357                                         "disabled split ring vectorized rx for offloading enabled");
2358                                 hw->use_vec_rx = 0;
2359                         }
2360                 }
2361         }
2362
2363         return 0;
2364 }
2365
2366
2367 static int
2368 virtio_dev_start(struct rte_eth_dev *dev)
2369 {
2370         uint16_t nb_queues, i;
2371         struct virtnet_rx *rxvq;
2372         struct virtnet_tx *txvq __rte_unused;
2373         struct virtio_hw *hw = dev->data->dev_private;
2374         int ret;
2375
2376         /* Finish the initialization of the queues */
2377         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2378                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2379                 if (ret < 0)
2380                         return ret;
2381         }
2382         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2383                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2384                 if (ret < 0)
2385                         return ret;
2386         }
2387
2388         /* check if lsc interrupt feature is enabled */
2389         if (dev->data->dev_conf.intr_conf.lsc) {
2390                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2391                         PMD_DRV_LOG(ERR, "link status not supported by host");
2392                         return -ENOTSUP;
2393                 }
2394         }
2395
2396         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2397          * in device configure, but it could be unmapped  when device is
2398          * stopped.
2399          */
2400         if (dev->data->dev_conf.intr_conf.lsc ||
2401             dev->data->dev_conf.intr_conf.rxq) {
2402                 virtio_intr_disable(dev);
2403
2404                 /* Setup interrupt callback  */
2405                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2406                         rte_intr_callback_register(dev->intr_handle,
2407                                                    virtio_interrupt_handler,
2408                                                    dev);
2409
2410                 if (virtio_intr_enable(dev) < 0) {
2411                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2412                         return -EIO;
2413                 }
2414         }
2415
2416         /*Notify the backend
2417          *Otherwise the tap backend might already stop its queue due to fullness.
2418          *vhost backend will have no chance to be waked up
2419          */
2420         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2421         if (hw->max_queue_pairs > 1) {
2422                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2423                         return -EINVAL;
2424         }
2425
2426         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2427
2428         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2429                 rxvq = dev->data->rx_queues[i];
2430                 /* Flush the old packets */
2431                 virtqueue_rxvq_flush(rxvq->vq);
2432                 virtqueue_notify(rxvq->vq);
2433         }
2434
2435         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2436                 txvq = dev->data->tx_queues[i];
2437                 virtqueue_notify(txvq->vq);
2438         }
2439
2440         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2441
2442         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2443                 rxvq = dev->data->rx_queues[i];
2444                 VIRTQUEUE_DUMP(rxvq->vq);
2445         }
2446
2447         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2448                 txvq = dev->data->tx_queues[i];
2449                 VIRTQUEUE_DUMP(txvq->vq);
2450         }
2451
2452         set_rxtx_funcs(dev);
2453         hw->started = true;
2454
2455         /* Initialize Link state */
2456         virtio_dev_link_update(dev, 0);
2457
2458         return 0;
2459 }
2460
2461 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2462 {
2463         struct virtio_hw *hw = dev->data->dev_private;
2464         uint16_t nr_vq = virtio_get_nr_vq(hw);
2465         const char *type __rte_unused;
2466         unsigned int i, mbuf_num = 0;
2467         struct virtqueue *vq;
2468         struct rte_mbuf *buf;
2469         int queue_type;
2470
2471         if (hw->vqs == NULL)
2472                 return;
2473
2474         for (i = 0; i < nr_vq; i++) {
2475                 vq = hw->vqs[i];
2476                 if (!vq)
2477                         continue;
2478
2479                 queue_type = virtio_get_queue_type(hw, i);
2480                 if (queue_type == VTNET_RQ)
2481                         type = "rxq";
2482                 else if (queue_type == VTNET_TQ)
2483                         type = "txq";
2484                 else
2485                         continue;
2486
2487                 PMD_INIT_LOG(DEBUG,
2488                         "Before freeing %s[%d] used and unused buf",
2489                         type, i);
2490                 VIRTQUEUE_DUMP(vq);
2491
2492                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2493                         rte_pktmbuf_free(buf);
2494                         mbuf_num++;
2495                 }
2496
2497                 PMD_INIT_LOG(DEBUG,
2498                         "After freeing %s[%d] used and unused buf",
2499                         type, i);
2500                 VIRTQUEUE_DUMP(vq);
2501         }
2502
2503         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2504 }
2505
2506 /*
2507  * Stop device: disable interrupt and mark link down
2508  */
2509 static void
2510 virtio_dev_stop(struct rte_eth_dev *dev)
2511 {
2512         struct virtio_hw *hw = dev->data->dev_private;
2513         struct rte_eth_link link;
2514         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2515
2516         PMD_INIT_LOG(DEBUG, "stop");
2517
2518         rte_spinlock_lock(&hw->state_lock);
2519         if (!hw->started)
2520                 goto out_unlock;
2521         hw->started = false;
2522
2523         if (intr_conf->lsc || intr_conf->rxq) {
2524                 virtio_intr_disable(dev);
2525
2526                 /* Reset interrupt callback  */
2527                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2528                         rte_intr_callback_unregister(dev->intr_handle,
2529                                                      virtio_interrupt_handler,
2530                                                      dev);
2531                 }
2532         }
2533
2534         memset(&link, 0, sizeof(link));
2535         rte_eth_linkstatus_set(dev, &link);
2536 out_unlock:
2537         rte_spinlock_unlock(&hw->state_lock);
2538 }
2539
2540 static int
2541 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2542 {
2543         struct rte_eth_link link;
2544         uint16_t status;
2545         struct virtio_hw *hw = dev->data->dev_private;
2546
2547         memset(&link, 0, sizeof(link));
2548         link.link_duplex = hw->duplex;
2549         link.link_speed  = hw->speed;
2550         link.link_autoneg = ETH_LINK_AUTONEG;
2551
2552         if (!hw->started) {
2553                 link.link_status = ETH_LINK_DOWN;
2554                 link.link_speed = ETH_SPEED_NUM_NONE;
2555         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2556                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2557                 vtpci_read_dev_config(hw,
2558                                 offsetof(struct virtio_net_config, status),
2559                                 &status, sizeof(status));
2560                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2561                         link.link_status = ETH_LINK_DOWN;
2562                         link.link_speed = ETH_SPEED_NUM_NONE;
2563                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2564                                      dev->data->port_id);
2565                 } else {
2566                         link.link_status = ETH_LINK_UP;
2567                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2568                                      dev->data->port_id);
2569                 }
2570         } else {
2571                 link.link_status = ETH_LINK_UP;
2572         }
2573
2574         return rte_eth_linkstatus_set(dev, &link);
2575 }
2576
2577 static int
2578 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2579 {
2580         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2581         struct virtio_hw *hw = dev->data->dev_private;
2582         uint64_t offloads = rxmode->offloads;
2583
2584         if (mask & ETH_VLAN_FILTER_MASK) {
2585                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2586                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2587
2588                         PMD_DRV_LOG(NOTICE,
2589                                 "vlan filtering not available on this host");
2590
2591                         return -ENOTSUP;
2592                 }
2593         }
2594
2595         if (mask & ETH_VLAN_STRIP_MASK)
2596                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2597
2598         return 0;
2599 }
2600
2601 static int
2602 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2603 {
2604         uint64_t tso_mask, host_features;
2605         struct virtio_hw *hw = dev->data->dev_private;
2606         dev_info->speed_capa = virtio_dev_speed_capa_get(hw->speed);
2607
2608         dev_info->max_rx_queues =
2609                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2610         dev_info->max_tx_queues =
2611                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2612         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2613         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2614         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2615
2616         host_features = VTPCI_OPS(hw)->get_features(hw);
2617         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2618         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2619         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2620                 dev_info->rx_offload_capa |=
2621                         DEV_RX_OFFLOAD_TCP_CKSUM |
2622                         DEV_RX_OFFLOAD_UDP_CKSUM;
2623         }
2624         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2625                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2626         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2627                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2628         if ((host_features & tso_mask) == tso_mask)
2629                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2630
2631         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2632                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2633         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2634                 dev_info->tx_offload_capa |=
2635                         DEV_TX_OFFLOAD_UDP_CKSUM |
2636                         DEV_TX_OFFLOAD_TCP_CKSUM;
2637         }
2638         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2639                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2640         if ((host_features & tso_mask) == tso_mask)
2641                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2642
2643         return 0;
2644 }
2645
2646 /*
2647  * It enables testpmd to collect per queue stats.
2648  */
2649 static int
2650 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2651 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2652 __rte_unused uint8_t is_rx)
2653 {
2654         return 0;
2655 }
2656
2657 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2658 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2659 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2660 RTE_LOG_REGISTER(virtio_logtype_init, pmd.net.virtio.init, NOTICE);
2661 RTE_LOG_REGISTER(virtio_logtype_driver, pmd.net.virtio.driver, NOTICE);