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 void
 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
 715         if (!hw->opened)
 716                 return;
 717         hw->opened = false;
 718
 719         /* reset the NIC */
 720         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 721                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 722         if (intr_conf->rxq)
 723                 virtio_queues_unbind_intr(dev);
 724
 725         if (intr_conf->lsc || intr_conf->rxq) {
 726                 virtio_intr_disable(dev);
 727                 rte_intr_efd_disable(dev->intr_handle);
 728                 rte_free(dev->intr_handle->intr_vec);
 729                 dev->intr_handle->intr_vec = NULL;
 730         }
 731
 732         vtpci_reset(hw);
 733         virtio_dev_free_mbufs(dev);
 734         virtio_free_queues(hw);
 735
 736 #ifdef RTE_VIRTIO_USER
 737         if (hw->virtio_user_dev)
 738                 virtio_user_dev_uninit(hw->virtio_user_dev);
 739         else
 740 #endif
 741         if (dev->device) {
 742                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(dev));
 743                 if (!hw->modern)
 744                         rte_pci_ioport_unmap(VTPCI_IO(hw));
 745         }
 746 }
 747
 748 static int
 749 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 750 {
 751         struct virtio_hw *hw = dev->data->dev_private;
 752         struct virtio_pmd_ctrl ctrl;
 753         int dlen[1];
 754         int ret;
 755
 756         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 757                 PMD_INIT_LOG(INFO, "host does not support rx control");
 758                 return -ENOTSUP;
 759         }
 760
 761         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 762         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 763         ctrl.data[0] = 1;
 764         dlen[0] = 1;
 765
 766         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 767         if (ret) {
 768                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 769                 return -EAGAIN;
 770         }
 771
 772         return 0;
 773 }
 774
 775 static int
 776 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 777 {
 778         struct virtio_hw *hw = dev->data->dev_private;
 779         struct virtio_pmd_ctrl ctrl;
 780         int dlen[1];
 781         int ret;
 782
 783         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 784                 PMD_INIT_LOG(INFO, "host does not support rx control");
 785                 return -ENOTSUP;
 786         }
 787
 788         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 789         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 790         ctrl.data[0] = 0;
 791         dlen[0] = 1;
 792
 793         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 794         if (ret) {
 795                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 796                 return -EAGAIN;
 797         }
 798
 799         return 0;
 800 }
 801
 802 static int
 803 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 804 {
 805         struct virtio_hw *hw = dev->data->dev_private;
 806         struct virtio_pmd_ctrl ctrl;
 807         int dlen[1];
 808         int ret;
 809
 810         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 811                 PMD_INIT_LOG(INFO, "host does not support rx control");
 812                 return -ENOTSUP;
 813         }
 814
 815         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 816         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 817         ctrl.data[0] = 1;
 818         dlen[0] = 1;
 819
 820         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 821         if (ret) {
 822                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 823                 return -EAGAIN;
 824         }
 825
 826         return 0;
 827 }
 828
 829 static int
 830 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 831 {
 832         struct virtio_hw *hw = dev->data->dev_private;
 833         struct virtio_pmd_ctrl ctrl;
 834         int dlen[1];
 835         int ret;
 836
 837         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 838                 PMD_INIT_LOG(INFO, "host does not support rx control");
 839                 return -ENOTSUP;
 840         }
 841
 842         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 843         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 844         ctrl.data[0] = 0;
 845         dlen[0] = 1;
 846
 847         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 848         if (ret) {
 849                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 850                 return -EAGAIN;
 851         }
 852
 853         return 0;
 854 }
 855
 856 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 857 static int
 858 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 859 {
 860         struct virtio_hw *hw = dev->data->dev_private;
 861         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 862                                  hw->vtnet_hdr_size;
 863         uint32_t frame_size = mtu + ether_hdr_len;
 864         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 865
 866         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 867
 868         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 869                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 870                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 871                 return -EINVAL;
 872         }
 873         return 0;
 874 }
 875
 876 static int
 877 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 878 {
 879         struct virtio_hw *hw = dev->data->dev_private;
 880         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 881         struct virtqueue *vq = rxvq->vq;
 882
 883         virtqueue_enable_intr(vq);
 884         virtio_mb(hw->weak_barriers);
 885         return 0;
 886 }
 887
 888 static int
 889 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 890 {
 891         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 892         struct virtqueue *vq = rxvq->vq;
 893
 894         virtqueue_disable_intr(vq);
 895         return 0;
 896 }
 897
 898 /*
 899  * dev_ops for virtio, bare necessities for basic operation
 900  */
 901 static const struct eth_dev_ops virtio_eth_dev_ops = {
 902         .dev_configure           = virtio_dev_configure,
 903         .dev_start               = virtio_dev_start,
 904         .dev_stop                = virtio_dev_stop,
 905         .dev_close               = virtio_dev_close,
 906         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 907         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 908         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 909         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 910         .mtu_set                 = virtio_mtu_set,
 911         .dev_infos_get           = virtio_dev_info_get,
 912         .stats_get               = virtio_dev_stats_get,
 913         .xstats_get              = virtio_dev_xstats_get,
 914         .xstats_get_names        = virtio_dev_xstats_get_names,
 915         .stats_reset             = virtio_dev_stats_reset,
 916         .xstats_reset            = virtio_dev_stats_reset,
 917         .link_update             = virtio_dev_link_update,
 918         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 919         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 920         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 921         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 922         .rx_queue_release        = virtio_dev_queue_release,
 923         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 924         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 925         .tx_queue_release        = virtio_dev_queue_release,
 926         /* collect stats per queue */
 927         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 928         .vlan_filter_set         = virtio_vlan_filter_set,
 929         .mac_addr_add            = virtio_mac_addr_add,
 930         .mac_addr_remove         = virtio_mac_addr_remove,
 931         .mac_addr_set            = virtio_mac_addr_set,
 932 };
 933
 934 /*
 935  * dev_ops for virtio-user in secondary processes, as we just have
 936  * some limited supports currently.
 937  */
 938 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 939         .dev_infos_get           = virtio_dev_info_get,
 940         .stats_get               = virtio_dev_stats_get,
 941         .xstats_get              = virtio_dev_xstats_get,
 942         .xstats_get_names        = virtio_dev_xstats_get_names,
 943         .stats_reset             = virtio_dev_stats_reset,
 944         .xstats_reset            = virtio_dev_stats_reset,
 945         /* collect stats per queue */
 946         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 947 };
 948
 949 static void
 950 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 951 {
 952         unsigned i;
 953
 954         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 955                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 956                 if (txvq == NULL)
 957                         continue;
 958
 959                 stats->opackets += txvq->stats.packets;
 960                 stats->obytes += txvq->stats.bytes;
 961
 962                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 963                         stats->q_opackets[i] = txvq->stats.packets;
 964                         stats->q_obytes[i] = txvq->stats.bytes;
 965                 }
 966         }
 967
 968         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 969                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 970                 if (rxvq == NULL)
 971                         continue;
 972
 973                 stats->ipackets += rxvq->stats.packets;
 974                 stats->ibytes += rxvq->stats.bytes;
 975                 stats->ierrors += rxvq->stats.errors;
 976
 977                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 978                         stats->q_ipackets[i] = rxvq->stats.packets;
 979                         stats->q_ibytes[i] = rxvq->stats.bytes;
 980                 }
 981         }
 982
 983         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 984 }
 985
 986 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 987                                        struct rte_eth_xstat_name *xstats_names,
 988                                        __rte_unused unsigned limit)
 989 {
 990         unsigned i;
 991         unsigned count = 0;
 992         unsigned t;
 993
 994         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 995                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 996
 997         if (xstats_names != NULL) {
 998                 /* Note: limit checked in rte_eth_xstats_names() */
 999
1000                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1001                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1002                         if (rxvq == NULL)
1003                                 continue;
1004                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1005                                 snprintf(xstats_names[count].name,
1006                                         sizeof(xstats_names[count].name),
1007                                         "rx_q%u_%s", i,
1008                                         rte_virtio_rxq_stat_strings[t].name);
1009                                 count++;
1010                         }
1011                 }
1012
1013                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1014                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1015                         if (txvq == NULL)
1016                                 continue;
1017                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1018                                 snprintf(xstats_names[count].name,
1019                                         sizeof(xstats_names[count].name),
1020                                         "tx_q%u_%s", i,
1021                                         rte_virtio_txq_stat_strings[t].name);
1022                                 count++;
1023                         }
1024                 }
1025                 return count;
1026         }
1027         return nstats;
1028 }
1029
1030 static int
1031 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1032                       unsigned n)
1033 {
1034         unsigned i;
1035         unsigned count = 0;
1036
1037         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1038                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1039
1040         if (n < nstats)
1041                 return nstats;
1042
1043         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1044                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1045
1046                 if (rxvq == NULL)
1047                         continue;
1048
1049                 unsigned t;
1050
1051                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1052                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1053                                 rte_virtio_rxq_stat_strings[t].offset);
1054                         xstats[count].id = count;
1055                         count++;
1056                 }
1057         }
1058
1059         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1060                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1061
1062                 if (txvq == NULL)
1063                         continue;
1064
1065                 unsigned t;
1066
1067                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1068                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1069                                 rte_virtio_txq_stat_strings[t].offset);
1070                         xstats[count].id = count;
1071                         count++;
1072                 }
1073         }
1074
1075         return count;
1076 }
1077
1078 static int
1079 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1080 {
1081         virtio_update_stats(dev, stats);
1082
1083         return 0;
1084 }
1085
1086 static int
1087 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1088 {
1089         unsigned int i;
1090
1091         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1092                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1093                 if (txvq == NULL)
1094                         continue;
1095
1096                 txvq->stats.packets = 0;
1097                 txvq->stats.bytes = 0;
1098                 txvq->stats.multicast = 0;
1099                 txvq->stats.broadcast = 0;
1100                 memset(txvq->stats.size_bins, 0,
1101                        sizeof(txvq->stats.size_bins[0]) * 8);
1102         }
1103
1104         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1105                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1106                 if (rxvq == NULL)
1107                         continue;
1108
1109                 rxvq->stats.packets = 0;
1110                 rxvq->stats.bytes = 0;
1111                 rxvq->stats.errors = 0;
1112                 rxvq->stats.multicast = 0;
1113                 rxvq->stats.broadcast = 0;
1114                 memset(rxvq->stats.size_bins, 0,
1115                        sizeof(rxvq->stats.size_bins[0]) * 8);
1116         }
1117
1118         return 0;
1119 }
1120
1121 static void
1122 virtio_set_hwaddr(struct virtio_hw *hw)
1123 {
1124         vtpci_write_dev_config(hw,
1125                         offsetof(struct virtio_net_config, mac),
1126                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1127 }
1128
1129 static void
1130 virtio_get_hwaddr(struct virtio_hw *hw)
1131 {
1132         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1133                 vtpci_read_dev_config(hw,
1134                         offsetof(struct virtio_net_config, mac),
1135                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1136         } else {
1137                 rte_eth_random_addr(&hw->mac_addr[0]);
1138                 virtio_set_hwaddr(hw);
1139         }
1140 }
1141
1142 static int
1143 virtio_mac_table_set(struct virtio_hw *hw,
1144                      const struct virtio_net_ctrl_mac *uc,
1145                      const struct virtio_net_ctrl_mac *mc)
1146 {
1147         struct virtio_pmd_ctrl ctrl;
1148         int err, len[2];
1149
1150         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1151                 PMD_DRV_LOG(INFO, "host does not support mac table");
1152                 return -1;
1153         }
1154
1155         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1156         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1157
1158         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1159         memcpy(ctrl.data, uc, len[0]);
1160
1161         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1162         memcpy(ctrl.data + len[0], mc, len[1]);
1163
1164         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1165         if (err != 0)
1166                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1167         return err;
1168 }
1169
1170 static int
1171 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1172                     uint32_t index, uint32_t vmdq __rte_unused)
1173 {
1174         struct virtio_hw *hw = dev->data->dev_private;
1175         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1176         unsigned int i;
1177         struct virtio_net_ctrl_mac *uc, *mc;
1178
1179         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1180                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1181                 return -EINVAL;
1182         }
1183
1184         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1185                 sizeof(uc->entries));
1186         uc->entries = 0;
1187         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1188                 sizeof(mc->entries));
1189         mc->entries = 0;
1190
1191         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1192                 const struct rte_ether_addr *addr
1193                         = (i == index) ? mac_addr : addrs + i;
1194                 struct virtio_net_ctrl_mac *tbl
1195                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1196
1197                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1198         }
1199
1200         return virtio_mac_table_set(hw, uc, mc);
1201 }
1202
1203 static void
1204 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1205 {
1206         struct virtio_hw *hw = dev->data->dev_private;
1207         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1208         struct virtio_net_ctrl_mac *uc, *mc;
1209         unsigned int i;
1210
1211         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1212                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1213                 return;
1214         }
1215
1216         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1217                 sizeof(uc->entries));
1218         uc->entries = 0;
1219         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1220                 sizeof(mc->entries));
1221         mc->entries = 0;
1222
1223         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1224                 struct virtio_net_ctrl_mac *tbl;
1225
1226                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1227                         continue;
1228
1229                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1230                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1231                         RTE_ETHER_ADDR_LEN);
1232         }
1233
1234         virtio_mac_table_set(hw, uc, mc);
1235 }
1236
1237 static int
1238 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1239 {
1240         struct virtio_hw *hw = dev->data->dev_private;
1241
1242         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1243
1244         /* Use atomic update if available */
1245         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1246                 struct virtio_pmd_ctrl ctrl;
1247                 int len = RTE_ETHER_ADDR_LEN;
1248
1249                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1250                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1251
1252                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1253                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1254         }
1255
1256         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1257                 return -ENOTSUP;
1258
1259         virtio_set_hwaddr(hw);
1260         return 0;
1261 }
1262
1263 static int
1264 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1265 {
1266         struct virtio_hw *hw = dev->data->dev_private;
1267         struct virtio_pmd_ctrl ctrl;
1268         int len;
1269
1270         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1271                 return -ENOTSUP;
1272
1273         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1274         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1275         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1276         len = sizeof(vlan_id);
1277
1278         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1279 }
1280
1281 static int
1282 virtio_intr_unmask(struct rte_eth_dev *dev)
1283 {
1284         struct virtio_hw *hw = dev->data->dev_private;
1285
1286         if (rte_intr_ack(dev->intr_handle) < 0)
1287                 return -1;
1288
1289         if (!hw->virtio_user_dev)
1290                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1291
1292         return 0;
1293 }
1294
1295 static int
1296 virtio_intr_enable(struct rte_eth_dev *dev)
1297 {
1298         struct virtio_hw *hw = dev->data->dev_private;
1299
1300         if (rte_intr_enable(dev->intr_handle) < 0)
1301                 return -1;
1302
1303         if (!hw->virtio_user_dev)
1304                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1305
1306         return 0;
1307 }
1308
1309 static int
1310 virtio_intr_disable(struct rte_eth_dev *dev)
1311 {
1312         struct virtio_hw *hw = dev->data->dev_private;
1313
1314         if (rte_intr_disable(dev->intr_handle) < 0)
1315                 return -1;
1316
1317         if (!hw->virtio_user_dev)
1318                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1319
1320         return 0;
1321 }
1322
1323 static int
1324 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1325 {
1326         uint64_t host_features;
1327
1328         /* Prepare guest_features: feature that driver wants to support */
1329         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1330                 req_features);
1331
1332         /* Read device(host) feature bits */
1333         host_features = VTPCI_OPS(hw)->get_features(hw);
1334         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1335                 host_features);
1336
1337         /* If supported, ensure MTU value is valid before acknowledging it. */
1338         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1339                 struct virtio_net_config config;
1340
1341                 vtpci_read_dev_config(hw,
1342                         offsetof(struct virtio_net_config, mtu),
1343                         &config.mtu, sizeof(config.mtu));
1344
1345                 if (config.mtu < RTE_ETHER_MIN_MTU)
1346                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1347         }
1348
1349         /*
1350          * Negotiate features: Subset of device feature bits are written back
1351          * guest feature bits.
1352          */
1353         hw->guest_features = req_features;
1354         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1355         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1356                 hw->guest_features);
1357
1358         if (hw->modern) {
1359                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1360                         PMD_INIT_LOG(ERR,
1361                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1362                         return -1;
1363                 }
1364                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1365                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1366                         PMD_INIT_LOG(ERR,
1367                                 "failed to set FEATURES_OK status!");
1368                         return -1;
1369                 }
1370         }
1371
1372         hw->req_guest_features = req_features;
1373
1374         return 0;
1375 }
1376
1377 int
1378 virtio_dev_pause(struct rte_eth_dev *dev)
1379 {
1380         struct virtio_hw *hw = dev->data->dev_private;
1381
1382         rte_spinlock_lock(&hw->state_lock);
1383
1384         if (hw->started == 0) {
1385                 /* Device is just stopped. */
1386                 rte_spinlock_unlock(&hw->state_lock);
1387                 return -1;
1388         }
1389         hw->started = 0;
1390         /*
1391          * Prevent the worker threads from touching queues to avoid contention,
1392          * 1 ms should be enough for the ongoing Tx function to finish.
1393          */
1394         rte_delay_ms(1);
1395         return 0;
1396 }
1397
1398 /*
1399  * Recover hw state to let the worker threads continue.
1400  */
1401 void
1402 virtio_dev_resume(struct rte_eth_dev *dev)
1403 {
1404         struct virtio_hw *hw = dev->data->dev_private;
1405
1406         hw->started = 1;
1407         rte_spinlock_unlock(&hw->state_lock);
1408 }
1409
1410 /*
1411  * Should be called only after device is paused.
1412  */
1413 int
1414 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1415                 int nb_pkts)
1416 {
1417         struct virtio_hw *hw = dev->data->dev_private;
1418         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1419         int ret;
1420
1421         hw->inject_pkts = tx_pkts;
1422         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1423         hw->inject_pkts = NULL;
1424
1425         return ret;
1426 }
1427
1428 static void
1429 virtio_notify_peers(struct rte_eth_dev *dev)
1430 {
1431         struct virtio_hw *hw = dev->data->dev_private;
1432         struct virtnet_rx *rxvq;
1433         struct rte_mbuf *rarp_mbuf;
1434
1435         if (!dev->data->rx_queues)
1436                 return;
1437
1438         rxvq = dev->data->rx_queues[0];
1439         if (!rxvq)
1440                 return;
1441
1442         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1443                         (struct rte_ether_addr *)hw->mac_addr);
1444         if (rarp_mbuf == NULL) {
1445                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1446                 return;
1447         }
1448
1449         /* If virtio port just stopped, no need to send RARP */
1450         if (virtio_dev_pause(dev) < 0) {
1451                 rte_pktmbuf_free(rarp_mbuf);
1452                 return;
1453         }
1454
1455         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1456         virtio_dev_resume(dev);
1457 }
1458
1459 static void
1460 virtio_ack_link_announce(struct rte_eth_dev *dev)
1461 {
1462         struct virtio_hw *hw = dev->data->dev_private;
1463         struct virtio_pmd_ctrl ctrl;
1464
1465         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1466         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1467
1468         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1469 }
1470
1471 /*
1472  * Process virtio config changed interrupt. Call the callback
1473  * if link state changed, generate gratuitous RARP packet if
1474  * the status indicates an ANNOUNCE.
1475  */
1476 void
1477 virtio_interrupt_handler(void *param)
1478 {
1479         struct rte_eth_dev *dev = param;
1480         struct virtio_hw *hw = dev->data->dev_private;
1481         uint8_t isr;
1482         uint16_t status;
1483
1484         /* Read interrupt status which clears interrupt */
1485         isr = vtpci_isr(hw);
1486         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1487
1488         if (virtio_intr_unmask(dev) < 0)
1489                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1490
1491         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1492                 if (virtio_dev_link_update(dev, 0) == 0)
1493                         _rte_eth_dev_callback_process(dev,
1494                                                       RTE_ETH_EVENT_INTR_LSC,
1495                                                       NULL);
1496
1497                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1498                         vtpci_read_dev_config(hw,
1499                                 offsetof(struct virtio_net_config, status),
1500                                 &status, sizeof(status));
1501                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1502                                 virtio_notify_peers(dev);
1503                                 if (hw->cvq)
1504                                         virtio_ack_link_announce(dev);
1505                         }
1506                 }
1507         }
1508 }
1509
1510 /* set rx and tx handlers according to what is supported */
1511 static void
1512 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1513 {
1514         struct virtio_hw *hw = eth_dev->data->dev_private;
1515
1516         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1517         if (vtpci_packed_queue(hw)) {
1518                 PMD_INIT_LOG(INFO,
1519                         "virtio: using packed ring %s Tx path on port %u",
1520                         hw->use_vec_tx ? "vectorized" : "standard",
1521                         eth_dev->data->port_id);
1522                 if (hw->use_vec_tx)
1523                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed_vec;
1524                 else
1525                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1526         } else {
1527                 if (hw->use_inorder_tx) {
1528                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1529                                 eth_dev->data->port_id);
1530                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1531                 } else {
1532                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1533                                 eth_dev->data->port_id);
1534                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1535                 }
1536         }
1537
1538         if (vtpci_packed_queue(hw)) {
1539                 if (hw->use_vec_rx) {
1540                         PMD_INIT_LOG(INFO,
1541                                 "virtio: using packed ring vectorized Rx path on port %u",
1542                                 eth_dev->data->port_id);
1543                         eth_dev->rx_pkt_burst =
1544                                 &virtio_recv_pkts_packed_vec;
1545                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1546                         PMD_INIT_LOG(INFO,
1547                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1548                                 eth_dev->data->port_id);
1549                         eth_dev->rx_pkt_burst =
1550                                 &virtio_recv_mergeable_pkts_packed;
1551                 } else {
1552                         PMD_INIT_LOG(INFO,
1553                                 "virtio: using packed ring standard Rx path on port %u",
1554                                 eth_dev->data->port_id);
1555                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1556                 }
1557         } else {
1558                 if (hw->use_vec_rx) {
1559                         PMD_INIT_LOG(INFO, "virtio: using vectorized Rx path on port %u",
1560                                 eth_dev->data->port_id);
1561                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1562                 } else if (hw->use_inorder_rx) {
1563                         PMD_INIT_LOG(INFO,
1564                                 "virtio: using inorder Rx path on port %u",
1565                                 eth_dev->data->port_id);
1566                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1567                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1568                         PMD_INIT_LOG(INFO,
1569                                 "virtio: using mergeable buffer Rx path on port %u",
1570                                 eth_dev->data->port_id);
1571                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1572                 } else {
1573                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1574                                 eth_dev->data->port_id);
1575                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1576                 }
1577         }
1578
1579 }
1580
1581 /* Only support 1:1 queue/interrupt mapping so far.
1582  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1583  * interrupt vectors (<N+1).
1584  */
1585 static int
1586 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1587 {
1588         uint32_t i;
1589         struct virtio_hw *hw = dev->data->dev_private;
1590
1591         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1592         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1593                 dev->intr_handle->intr_vec[i] = i + 1;
1594                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1595                                                  VIRTIO_MSI_NO_VECTOR) {
1596                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1597                         return -EBUSY;
1598                 }
1599         }
1600
1601         return 0;
1602 }
1603
1604 static void
1605 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1606 {
1607         uint32_t i;
1608         struct virtio_hw *hw = dev->data->dev_private;
1609
1610         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1611         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1612                 VTPCI_OPS(hw)->set_queue_irq(hw,
1613                                              hw->vqs[i * VTNET_CQ],
1614                                              VIRTIO_MSI_NO_VECTOR);
1615 }
1616
1617 static int
1618 virtio_configure_intr(struct rte_eth_dev *dev)
1619 {
1620         struct virtio_hw *hw = dev->data->dev_private;
1621
1622         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1623                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1624                 return -ENOTSUP;
1625         }
1626
1627         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1628                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1629                 return -1;
1630         }
1631
1632         if (!dev->intr_handle->intr_vec) {
1633                 dev->intr_handle->intr_vec =
1634                         rte_zmalloc("intr_vec",
1635                                     hw->max_queue_pairs * sizeof(int), 0);
1636                 if (!dev->intr_handle->intr_vec) {
1637                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1638                                      hw->max_queue_pairs);
1639                         return -ENOMEM;
1640                 }
1641         }
1642
1643         /* Re-register callback to update max_intr */
1644         rte_intr_callback_unregister(dev->intr_handle,
1645                                      virtio_interrupt_handler,
1646                                      dev);
1647         rte_intr_callback_register(dev->intr_handle,
1648                                    virtio_interrupt_handler,
1649                                    dev);
1650
1651         /* DO NOT try to remove this! This function will enable msix, or QEMU
1652          * will encounter SIGSEGV when DRIVER_OK is sent.
1653          * And for legacy devices, this should be done before queue/vec binding
1654          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1655          * (22) will be ignored.
1656          */
1657         if (virtio_intr_enable(dev) < 0) {
1658                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1659                 return -1;
1660         }
1661
1662         if (virtio_queues_bind_intr(dev) < 0) {
1663                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1664                 return -1;
1665         }
1666
1667         return 0;
1668 }
1669 #define SPEED_UNKNOWN    0xffffffff
1670 #define DUPLEX_UNKNOWN   0xff
1671 /* reset device and renegotiate features if needed */
1672 static int
1673 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1674 {
1675         struct virtio_hw *hw = eth_dev->data->dev_private;
1676         struct virtio_net_config *config;
1677         struct virtio_net_config local_config;
1678         struct rte_pci_device *pci_dev = NULL;
1679         int ret;
1680
1681         /* Reset the device although not necessary at startup */
1682         vtpci_reset(hw);
1683
1684         if (hw->vqs) {
1685                 virtio_dev_free_mbufs(eth_dev);
1686                 virtio_free_queues(hw);
1687         }
1688
1689         /* Tell the host we've noticed this device. */
1690         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1691
1692         /* Tell the host we've known how to drive the device. */
1693         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1694         if (virtio_negotiate_features(hw, req_features) < 0)
1695                 return -1;
1696
1697         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1698
1699         if (!hw->virtio_user_dev)
1700                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1701
1702         /* If host does not support both status and MSI-X then disable LSC */
1703         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1704             hw->use_msix != VIRTIO_MSIX_NONE)
1705                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1706         else
1707                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1708
1709         /* Setting up rx_header size for the device */
1710         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1711             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1712             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1713                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1714         else
1715                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1716
1717         /* Copy the permanent MAC address to: virtio_hw */
1718         virtio_get_hwaddr(hw);
1719         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1720                         &eth_dev->data->mac_addrs[0]);
1721         PMD_INIT_LOG(DEBUG,
1722                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1723                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1724                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1725
1726         if (hw->speed == SPEED_UNKNOWN) {
1727                 if (vtpci_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) {
1728                         config = &local_config;
1729                         vtpci_read_dev_config(hw,
1730                                 offsetof(struct virtio_net_config, speed),
1731                                 &config->speed, sizeof(config->speed));
1732                         vtpci_read_dev_config(hw,
1733                                 offsetof(struct virtio_net_config, duplex),
1734                                 &config->duplex, sizeof(config->duplex));
1735                         hw->speed = config->speed;
1736                         hw->duplex = config->duplex;
1737                 }
1738         }
1739         if (hw->speed == SPEED_UNKNOWN)
1740                 hw->speed = ETH_SPEED_NUM_10G;
1741         if (hw->duplex == DUPLEX_UNKNOWN)
1742                 hw->duplex = ETH_LINK_FULL_DUPLEX;
1743         PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d",
1744                 hw->speed, hw->duplex);
1745         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1746                 config = &local_config;
1747
1748                 vtpci_read_dev_config(hw,
1749                         offsetof(struct virtio_net_config, mac),
1750                         &config->mac, sizeof(config->mac));
1751
1752                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1753                         vtpci_read_dev_config(hw,
1754                                 offsetof(struct virtio_net_config, status),
1755                                 &config->status, sizeof(config->status));
1756                 } else {
1757                         PMD_INIT_LOG(DEBUG,
1758                                      "VIRTIO_NET_F_STATUS is not supported");
1759                         config->status = 0;
1760                 }
1761
1762                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1763                         vtpci_read_dev_config(hw,
1764                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1765                                 &config->max_virtqueue_pairs,
1766                                 sizeof(config->max_virtqueue_pairs));
1767                 } else {
1768                         PMD_INIT_LOG(DEBUG,
1769                                      "VIRTIO_NET_F_MQ is not supported");
1770                         config->max_virtqueue_pairs = 1;
1771                 }
1772
1773                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1774
1775                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1776                         vtpci_read_dev_config(hw,
1777                                 offsetof(struct virtio_net_config, mtu),
1778                                 &config->mtu,
1779                                 sizeof(config->mtu));
1780
1781                         /*
1782                          * MTU value has already been checked at negotiation
1783                          * time, but check again in case it has changed since
1784                          * then, which should not happen.
1785                          */
1786                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1787                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1788                                                 config->mtu);
1789                                 return -1;
1790                         }
1791
1792                         hw->max_mtu = config->mtu;
1793                         /* Set initial MTU to maximum one supported by vhost */
1794                         eth_dev->data->mtu = config->mtu;
1795
1796                 } else {
1797                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1798                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1799                 }
1800
1801                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1802                                 config->max_virtqueue_pairs);
1803                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1804                 PMD_INIT_LOG(DEBUG,
1805                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1806                                 config->mac[0], config->mac[1],
1807                                 config->mac[2], config->mac[3],
1808                                 config->mac[4], config->mac[5]);
1809         } else {
1810                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1811                 hw->max_queue_pairs = 1;
1812                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1813                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1814         }
1815
1816         ret = virtio_alloc_queues(eth_dev);
1817         if (ret < 0)
1818                 return ret;
1819
1820         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1821                 if (virtio_configure_intr(eth_dev) < 0) {
1822                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1823                         virtio_free_queues(hw);
1824                         return -1;
1825                 }
1826         }
1827
1828         vtpci_reinit_complete(hw);
1829
1830         if (pci_dev)
1831                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1832                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1833                         pci_dev->id.device_id);
1834
1835         return 0;
1836 }
1837
1838 /*
1839  * Remap the PCI device again (IO port map for legacy device and
1840  * memory map for modern device), so that the secondary process
1841  * could have the PCI initiated correctly.
1842  */
1843 static int
1844 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1845 {
1846         if (hw->modern) {
1847                 /*
1848                  * We don't have to re-parse the PCI config space, since
1849                  * rte_pci_map_device() makes sure the mapped address
1850                  * in secondary process would equal to the one mapped in
1851                  * the primary process: error will be returned if that
1852                  * requirement is not met.
1853                  *
1854                  * That said, we could simply reuse all cap pointers
1855                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1856                  * primary process, which is stored in shared memory.
1857                  */
1858                 if (rte_pci_map_device(pci_dev)) {
1859                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1860                         return -1;
1861                 }
1862         } else {
1863                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1864                         return -1;
1865         }
1866
1867         return 0;
1868 }
1869
1870 static void
1871 virtio_set_vtpci_ops(struct virtio_hw *hw)
1872 {
1873 #ifdef RTE_VIRTIO_USER
1874         if (hw->virtio_user_dev)
1875                 VTPCI_OPS(hw) = &virtio_user_ops;
1876         else
1877 #endif
1878         if (hw->modern)
1879                 VTPCI_OPS(hw) = &modern_ops;
1880         else
1881                 VTPCI_OPS(hw) = &legacy_ops;
1882 }
1883
1884 /*
1885  * This function is based on probe() function in virtio_pci.c
1886  * It returns 0 on success.
1887  */
1888 int
1889 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1890 {
1891         struct virtio_hw *hw = eth_dev->data->dev_private;
1892         uint32_t speed = SPEED_UNKNOWN;
1893         int vectorized = 0;
1894         int ret;
1895
1896         if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1897                 PMD_INIT_LOG(ERR,
1898                         "Not sufficient headroom required = %d, avail = %d",
1899                         (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1900                         RTE_PKTMBUF_HEADROOM);
1901
1902                 return -1;
1903         }
1904
1905         eth_dev->dev_ops = &virtio_eth_dev_ops;
1906
1907         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1908                 if (!hw->virtio_user_dev) {
1909                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1910                         if (ret)
1911                                 return ret;
1912                 }
1913
1914                 virtio_set_vtpci_ops(hw);
1915                 set_rxtx_funcs(eth_dev);
1916
1917                 return 0;
1918         }
1919         ret = virtio_dev_devargs_parse(eth_dev->device->devargs,
1920                  NULL, &speed, &vectorized);
1921         if (ret < 0)
1922                 return ret;
1923         hw->speed = speed;
1924         /*
1925          * Pass the information to the rte_eth_dev_close() that it should also
1926          * release the private port resources.
1927          */
1928         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1929
1930         /* Allocate memory for storing MAC addresses */
1931         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1932                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1933         if (eth_dev->data->mac_addrs == NULL) {
1934                 PMD_INIT_LOG(ERR,
1935                         "Failed to allocate %d bytes needed to store MAC addresses",
1936                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1937                 return -ENOMEM;
1938         }
1939
1940         hw->port_id = eth_dev->data->port_id;
1941         /* For virtio_user case the hw->virtio_user_dev is populated by
1942          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1943          */
1944         if (!hw->virtio_user_dev) {
1945                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1946                 if (ret)
1947                         goto err_vtpci_init;
1948         }
1949
1950         rte_spinlock_init(&hw->state_lock);
1951
1952         /* reset device and negotiate default features */
1953         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1954         if (ret < 0)
1955                 goto err_virtio_init;
1956
1957         if (vectorized) {
1958                 if (!vtpci_packed_queue(hw)) {
1959                         hw->use_vec_rx = 1;
1960                 } else {
1961 #if !defined(CC_AVX512_SUPPORT)
1962                         PMD_DRV_LOG(INFO,
1963                                 "building environment do not support packed ring vectorized");
1964 #else
1965                         hw->use_vec_rx = 1;
1966                         hw->use_vec_tx = 1;
1967 #endif
1968                 }
1969         }
1970
1971         hw->opened = true;
1972
1973         return 0;
1974
1975 err_virtio_init:
1976         if (!hw->virtio_user_dev) {
1977                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1978                 if (!hw->modern)
1979                         rte_pci_ioport_unmap(VTPCI_IO(hw));
1980         }
1981 err_vtpci_init:
1982         rte_free(eth_dev->data->mac_addrs);
1983         eth_dev->data->mac_addrs = NULL;
1984         return ret;
1985 }
1986
1987 static int
1988 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1989 {
1990         PMD_INIT_FUNC_TRACE();
1991
1992         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1993                 return 0;
1994
1995         virtio_dev_stop(eth_dev);
1996         virtio_dev_close(eth_dev);
1997
1998         eth_dev->dev_ops = NULL;
1999         eth_dev->tx_pkt_burst = NULL;
2000         eth_dev->rx_pkt_burst = NULL;
2001
2002         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
2003
2004         return 0;
2005 }
2006
2007
2008 static int vdpa_check_handler(__rte_unused const char *key,
2009                 const char *value, void *ret_val)
2010 {
2011         if (strcmp(value, "1") == 0)
2012                 *(int *)ret_val = 1;
2013         else
2014                 *(int *)ret_val = 0;
2015
2016         return 0;
2017 }
2018
2019
2020 static uint32_t
2021 virtio_dev_speed_capa_get(uint32_t speed)
2022 {
2023         switch (speed) {
2024         case ETH_SPEED_NUM_10G:
2025                 return ETH_LINK_SPEED_10G;
2026         case ETH_SPEED_NUM_20G:
2027                 return ETH_LINK_SPEED_20G;
2028         case ETH_SPEED_NUM_25G:
2029                 return ETH_LINK_SPEED_25G;
2030         case ETH_SPEED_NUM_40G:
2031                 return ETH_LINK_SPEED_40G;
2032         case ETH_SPEED_NUM_50G:
2033                 return ETH_LINK_SPEED_50G;
2034         case ETH_SPEED_NUM_56G:
2035                 return ETH_LINK_SPEED_56G;
2036         case ETH_SPEED_NUM_100G:
2037                 return ETH_LINK_SPEED_100G;
2038         default:
2039                 return 0;
2040         }
2041 }
2042
2043 static int vectorized_check_handler(__rte_unused const char *key,
2044                 const char *value, void *ret_val)
2045 {
2046         if (strcmp(value, "1") == 0)
2047                 *(int *)ret_val = 1;
2048         else
2049                 *(int *)ret_val = 0;
2050
2051         return 0;
2052 }
2053
2054 #define VIRTIO_ARG_SPEED      "speed"
2055 #define VIRTIO_ARG_VDPA       "vdpa"
2056 #define VIRTIO_ARG_VECTORIZED "vectorized"
2057
2058
2059 static int
2060 link_speed_handler(const char *key __rte_unused,
2061                 const char *value, void *ret_val)
2062 {
2063         uint32_t val;
2064         if (!value || !ret_val)
2065                 return -EINVAL;
2066         val = strtoul(value, NULL, 0);
2067         /* validate input */
2068         if (virtio_dev_speed_capa_get(val) == 0)
2069                 return -EINVAL;
2070         *(uint32_t *)ret_val = val;
2071
2072         return 0;
2073 }
2074
2075
2076 static int
2077 virtio_dev_devargs_parse(struct rte_devargs *devargs, int *vdpa,
2078         uint32_t *speed, int *vectorized)
2079 {
2080         struct rte_kvargs *kvlist;
2081         int ret = 0;
2082
2083         if (devargs == NULL)
2084                 return 0;
2085
2086         kvlist = rte_kvargs_parse(devargs->args, NULL);
2087         if (kvlist == NULL) {
2088                 PMD_INIT_LOG(ERR, "error when parsing param");
2089                 return 0;
2090         }
2091         if (vdpa && rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) {
2092                 /* vdpa mode selected when there's a key-value pair:
2093                  * vdpa=1
2094                  */
2095                 ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA,
2096                                 vdpa_check_handler, vdpa);
2097                 if (ret < 0) {
2098                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2099                                 VIRTIO_ARG_VDPA);
2100                         goto exit;
2101                 }
2102         }
2103         if (speed && rte_kvargs_count(kvlist, VIRTIO_ARG_SPEED) == 1) {
2104                 ret = rte_kvargs_process(kvlist,
2105                                         VIRTIO_ARG_SPEED,
2106                                         link_speed_handler, speed);
2107                 if (ret < 0) {
2108                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2109                                         VIRTIO_ARG_SPEED);
2110                         goto exit;
2111                 }
2112         }
2113
2114         if (vectorized &&
2115                 rte_kvargs_count(kvlist, VIRTIO_ARG_VECTORIZED) == 1) {
2116                 ret = rte_kvargs_process(kvlist,
2117                                 VIRTIO_ARG_VECTORIZED,
2118                                 vectorized_check_handler, vectorized);
2119                 if (ret < 0) {
2120                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2121                                         VIRTIO_ARG_VECTORIZED);
2122                         goto exit;
2123                 }
2124         }
2125
2126 exit:
2127         rte_kvargs_free(kvlist);
2128         return ret;
2129 }
2130
2131 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
2132         struct rte_pci_device *pci_dev)
2133 {
2134         int vdpa = 0;
2135         int ret = 0;
2136
2137         ret = virtio_dev_devargs_parse(pci_dev->device.devargs, &vdpa, NULL,
2138                 NULL);
2139         if (ret < 0) {
2140                 PMD_INIT_LOG(ERR, "devargs parsing is failed");
2141                 return ret;
2142         }
2143         /* virtio pmd skips probe if device needs to work in vdpa mode */
2144         if (vdpa == 1)
2145                 return 1;
2146
2147         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
2148                 eth_virtio_dev_init);
2149 }
2150
2151 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
2152 {
2153         int ret;
2154
2155         ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
2156         /* Port has already been released by close. */
2157         if (ret == -ENODEV)
2158                 ret = 0;
2159         return ret;
2160 }
2161
2162 static struct rte_pci_driver rte_virtio_pmd = {
2163         .driver = {
2164                 .name = "net_virtio",
2165         },
2166         .id_table = pci_id_virtio_map,
2167         .drv_flags = 0,
2168         .probe = eth_virtio_pci_probe,
2169         .remove = eth_virtio_pci_remove,
2170 };
2171
2172 RTE_INIT(rte_virtio_pmd_init)
2173 {
2174         rte_eal_iopl_init();
2175         rte_pci_register(&rte_virtio_pmd);
2176 }
2177
2178 static bool
2179 rx_offload_enabled(struct virtio_hw *hw)
2180 {
2181         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2182                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2183                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2184 }
2185
2186 static bool
2187 tx_offload_enabled(struct virtio_hw *hw)
2188 {
2189         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2190                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2191                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2192 }
2193
2194 /*
2195  * Configure virtio device
2196  * It returns 0 on success.
2197  */
2198 static int
2199 virtio_dev_configure(struct rte_eth_dev *dev)
2200 {
2201         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2202         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2203         struct virtio_hw *hw = dev->data->dev_private;
2204         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2205                 hw->vtnet_hdr_size;
2206         uint64_t rx_offloads = rxmode->offloads;
2207         uint64_t tx_offloads = txmode->offloads;
2208         uint64_t req_features;
2209         int ret;
2210
2211         PMD_INIT_LOG(DEBUG, "configure");
2212         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2213
2214         if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2215                 PMD_DRV_LOG(ERR,
2216                         "Unsupported Rx multi queue mode %d",
2217                         rxmode->mq_mode);
2218                 return -EINVAL;
2219         }
2220
2221         if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2222                 PMD_DRV_LOG(ERR,
2223                         "Unsupported Tx multi queue mode %d",
2224                         txmode->mq_mode);
2225                 return -EINVAL;
2226         }
2227
2228         if (dev->data->dev_conf.intr_conf.rxq) {
2229                 ret = virtio_init_device(dev, hw->req_guest_features);
2230                 if (ret < 0)
2231                         return ret;
2232         }
2233
2234         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2235                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2236
2237         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2238                            DEV_RX_OFFLOAD_TCP_CKSUM))
2239                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2240
2241         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2242                 req_features |=
2243                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2244                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2245
2246         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2247                            DEV_TX_OFFLOAD_TCP_CKSUM))
2248                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2249
2250         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2251                 req_features |=
2252                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2253                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2254
2255         /* if request features changed, reinit the device */
2256         if (req_features != hw->req_guest_features) {
2257                 ret = virtio_init_device(dev, req_features);
2258                 if (ret < 0)
2259                         return ret;
2260         }
2261
2262         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2263                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2264                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2265                 PMD_DRV_LOG(ERR,
2266                         "rx checksum not available on this host");
2267                 return -ENOTSUP;
2268         }
2269
2270         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2271                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2272                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2273                 PMD_DRV_LOG(ERR,
2274                         "Large Receive Offload not available on this host");
2275                 return -ENOTSUP;
2276         }
2277
2278         /* start control queue */
2279         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2280                 virtio_dev_cq_start(dev);
2281
2282         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2283                 hw->vlan_strip = 1;
2284
2285         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2286             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2287                 PMD_DRV_LOG(ERR,
2288                             "vlan filtering not available on this host");
2289                 return -ENOTSUP;
2290         }
2291
2292         hw->has_tx_offload = tx_offload_enabled(hw);
2293         hw->has_rx_offload = rx_offload_enabled(hw);
2294
2295         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2296                 /* Enable vector (0) for Link State Intrerrupt */
2297                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2298                                 VIRTIO_MSI_NO_VECTOR) {
2299                         PMD_DRV_LOG(ERR, "failed to set config vector");
2300                         return -EBUSY;
2301                 }
2302
2303         if (vtpci_packed_queue(hw)) {
2304 #if defined(RTE_ARCH_X86_64) && defined(CC_AVX512_SUPPORT)
2305                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2306                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
2307                      !vtpci_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2308                      !vtpci_with_feature(hw, VIRTIO_F_VERSION_1))) {
2309                         PMD_DRV_LOG(INFO,
2310                                 "disabled packed ring vectorized path for requirements not met");
2311                         hw->use_vec_rx = 0;
2312                         hw->use_vec_tx = 0;
2313                 }
2314 #else
2315                 hw->use_vec_rx = 0;
2316                 hw->use_vec_tx = 0;
2317 #endif
2318
2319                 if (hw->use_vec_rx) {
2320                         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2321                                 PMD_DRV_LOG(INFO,
2322                                         "disabled packed ring vectorized rx for mrg_rxbuf enabled");
2323                                 hw->use_vec_rx = 0;
2324                         }
2325
2326                         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) {
2327                                 PMD_DRV_LOG(INFO,
2328                                         "disabled packed ring vectorized rx for TCP_LRO enabled");
2329                                 hw->use_vec_rx = 0;
2330                         }
2331                 }
2332         } else {
2333                 if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2334                         hw->use_inorder_tx = 1;
2335                         hw->use_inorder_rx = 1;
2336                         hw->use_vec_rx = 0;
2337                 }
2338
2339                 if (hw->use_vec_rx) {
2340 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
2341                         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2342                                 PMD_DRV_LOG(INFO,
2343                                         "disabled split ring vectorized path for requirement not met");
2344                                 hw->use_vec_rx = 0;
2345                         }
2346 #endif
2347                         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2348                                 PMD_DRV_LOG(INFO,
2349                                         "disabled split ring vectorized rx for mrg_rxbuf enabled");
2350                                 hw->use_vec_rx = 0;
2351                         }
2352
2353                         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2354                                            DEV_RX_OFFLOAD_TCP_CKSUM |
2355                                            DEV_RX_OFFLOAD_TCP_LRO |
2356                                            DEV_RX_OFFLOAD_VLAN_STRIP)) {
2357                                 PMD_DRV_LOG(INFO,
2358                                         "disabled split ring vectorized rx for offloading enabled");
2359                                 hw->use_vec_rx = 0;
2360                         }
2361                 }
2362         }
2363
2364         return 0;
2365 }
2366
2367
2368 static int
2369 virtio_dev_start(struct rte_eth_dev *dev)
2370 {
2371         uint16_t nb_queues, i;
2372         struct virtnet_rx *rxvq;
2373         struct virtnet_tx *txvq __rte_unused;
2374         struct virtio_hw *hw = dev->data->dev_private;
2375         int ret;
2376
2377         /* Finish the initialization of the queues */
2378         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2379                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2380                 if (ret < 0)
2381                         return ret;
2382         }
2383         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2384                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2385                 if (ret < 0)
2386                         return ret;
2387         }
2388
2389         /* check if lsc interrupt feature is enabled */
2390         if (dev->data->dev_conf.intr_conf.lsc) {
2391                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2392                         PMD_DRV_LOG(ERR, "link status not supported by host");
2393                         return -ENOTSUP;
2394                 }
2395         }
2396
2397         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2398          * in device configure, but it could be unmapped  when device is
2399          * stopped.
2400          */
2401         if (dev->data->dev_conf.intr_conf.lsc ||
2402             dev->data->dev_conf.intr_conf.rxq) {
2403                 virtio_intr_disable(dev);
2404
2405                 /* Setup interrupt callback  */
2406                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2407                         rte_intr_callback_register(dev->intr_handle,
2408                                                    virtio_interrupt_handler,
2409                                                    dev);
2410
2411                 if (virtio_intr_enable(dev) < 0) {
2412                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2413                         return -EIO;
2414                 }
2415         }
2416
2417         /*Notify the backend
2418          *Otherwise the tap backend might already stop its queue due to fullness.
2419          *vhost backend will have no chance to be waked up
2420          */
2421         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2422         if (hw->max_queue_pairs > 1) {
2423                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2424                         return -EINVAL;
2425         }
2426
2427         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2428
2429         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2430                 rxvq = dev->data->rx_queues[i];
2431                 /* Flush the old packets */
2432                 virtqueue_rxvq_flush(rxvq->vq);
2433                 virtqueue_notify(rxvq->vq);
2434         }
2435
2436         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2437                 txvq = dev->data->tx_queues[i];
2438                 virtqueue_notify(txvq->vq);
2439         }
2440
2441         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2442
2443         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2444                 rxvq = dev->data->rx_queues[i];
2445                 VIRTQUEUE_DUMP(rxvq->vq);
2446         }
2447
2448         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2449                 txvq = dev->data->tx_queues[i];
2450                 VIRTQUEUE_DUMP(txvq->vq);
2451         }
2452
2453         set_rxtx_funcs(dev);
2454         hw->started = true;
2455
2456         /* Initialize Link state */
2457         virtio_dev_link_update(dev, 0);
2458
2459         return 0;
2460 }
2461
2462 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2463 {
2464         struct virtio_hw *hw = dev->data->dev_private;
2465         uint16_t nr_vq = virtio_get_nr_vq(hw);
2466         const char *type __rte_unused;
2467         unsigned int i, mbuf_num = 0;
2468         struct virtqueue *vq;
2469         struct rte_mbuf *buf;
2470         int queue_type;
2471
2472         if (hw->vqs == NULL)
2473                 return;
2474
2475         for (i = 0; i < nr_vq; i++) {
2476                 vq = hw->vqs[i];
2477                 if (!vq)
2478                         continue;
2479
2480                 queue_type = virtio_get_queue_type(hw, i);
2481                 if (queue_type == VTNET_RQ)
2482                         type = "rxq";
2483                 else if (queue_type == VTNET_TQ)
2484                         type = "txq";
2485                 else
2486                         continue;
2487
2488                 PMD_INIT_LOG(DEBUG,
2489                         "Before freeing %s[%d] used and unused buf",
2490                         type, i);
2491                 VIRTQUEUE_DUMP(vq);
2492
2493                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2494                         rte_pktmbuf_free(buf);
2495                         mbuf_num++;
2496                 }
2497
2498                 PMD_INIT_LOG(DEBUG,
2499                         "After freeing %s[%d] used and unused buf",
2500                         type, i);
2501                 VIRTQUEUE_DUMP(vq);
2502         }
2503
2504         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2505 }
2506
2507 /*
2508  * Stop device: disable interrupt and mark link down
2509  */
2510 static void
2511 virtio_dev_stop(struct rte_eth_dev *dev)
2512 {
2513         struct virtio_hw *hw = dev->data->dev_private;
2514         struct rte_eth_link link;
2515         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2516
2517         PMD_INIT_LOG(DEBUG, "stop");
2518
2519         rte_spinlock_lock(&hw->state_lock);
2520         if (!hw->started)
2521                 goto out_unlock;
2522         hw->started = false;
2523
2524         if (intr_conf->lsc || intr_conf->rxq) {
2525                 virtio_intr_disable(dev);
2526
2527                 /* Reset interrupt callback  */
2528                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2529                         rte_intr_callback_unregister(dev->intr_handle,
2530                                                      virtio_interrupt_handler,
2531                                                      dev);
2532                 }
2533         }
2534
2535         memset(&link, 0, sizeof(link));
2536         rte_eth_linkstatus_set(dev, &link);
2537 out_unlock:
2538         rte_spinlock_unlock(&hw->state_lock);
2539 }
2540
2541 static int
2542 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2543 {
2544         struct rte_eth_link link;
2545         uint16_t status;
2546         struct virtio_hw *hw = dev->data->dev_private;
2547
2548         memset(&link, 0, sizeof(link));
2549         link.link_duplex = hw->duplex;
2550         link.link_speed  = hw->speed;
2551         link.link_autoneg = ETH_LINK_AUTONEG;
2552
2553         if (!hw->started) {
2554                 link.link_status = ETH_LINK_DOWN;
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                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2563                                      dev->data->port_id);
2564                 } else {
2565                         link.link_status = ETH_LINK_UP;
2566                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2567                                      dev->data->port_id);
2568                 }
2569         } else {
2570                 link.link_status = ETH_LINK_UP;
2571         }
2572
2573         return rte_eth_linkstatus_set(dev, &link);
2574 }
2575
2576 static int
2577 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2578 {
2579         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2580         struct virtio_hw *hw = dev->data->dev_private;
2581         uint64_t offloads = rxmode->offloads;
2582
2583         if (mask & ETH_VLAN_FILTER_MASK) {
2584                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2585                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2586
2587                         PMD_DRV_LOG(NOTICE,
2588                                 "vlan filtering not available on this host");
2589
2590                         return -ENOTSUP;
2591                 }
2592         }
2593
2594         if (mask & ETH_VLAN_STRIP_MASK)
2595                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2596
2597         return 0;
2598 }
2599
2600 static int
2601 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2602 {
2603         uint64_t tso_mask, host_features;
2604         struct virtio_hw *hw = dev->data->dev_private;
2605         dev_info->speed_capa = virtio_dev_speed_capa_get(hw->speed);
2606
2607         dev_info->max_rx_queues =
2608                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2609         dev_info->max_tx_queues =
2610                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2611         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2612         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2613         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2614
2615         host_features = VTPCI_OPS(hw)->get_features(hw);
2616         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2617         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2618         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2619                 dev_info->rx_offload_capa |=
2620                         DEV_RX_OFFLOAD_TCP_CKSUM |
2621                         DEV_RX_OFFLOAD_UDP_CKSUM;
2622         }
2623         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2624                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2625         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2626                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2627         if ((host_features & tso_mask) == tso_mask)
2628                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2629
2630         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2631                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2632         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2633                 dev_info->tx_offload_capa |=
2634                         DEV_TX_OFFLOAD_UDP_CKSUM |
2635                         DEV_TX_OFFLOAD_TCP_CKSUM;
2636         }
2637         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2638                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2639         if ((host_features & tso_mask) == tso_mask)
2640                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2641
2642         return 0;
2643 }
2644
2645 /*
2646  * It enables testpmd to collect per queue stats.
2647  */
2648 static int
2649 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2650 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2651 __rte_unused uint8_t is_rx)
2652 {
2653         return 0;
2654 }
2655
2656 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2657 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2658 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2659 RTE_LOG_REGISTER(virtio_logtype_init, pmd.net.virtio.init, NOTICE);
2660 RTE_LOG_REGISTER(virtio_logtype_driver, pmd.net.virtio.driver, NOTICE);