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                         /* first indirect descriptor is always the tx header */
 613                         if (!vtpci_packed_queue(hw)) {
 614                                 struct vring_desc *start_dp = txr[i].tx_indir;
 615                                 vring_desc_init_split(start_dp,
 616                                                       RTE_DIM(txr[i].tx_indir));
 617                                 start_dp->addr = txvq->virtio_net_hdr_mem
 618                                         + i * sizeof(*txr)
 619                                         + offsetof(struct virtio_tx_region,
 620                                                    tx_hdr);
 621                                 start_dp->len = hw->vtnet_hdr_size;
 622                                 start_dp->flags = VRING_DESC_F_NEXT;
 623                         } else {
 624                                 struct vring_packed_desc *start_dp =
 625                                         txr[i].tx_packed_indir;
 626                                 vring_desc_init_indirect_packed(start_dp,
 627                                       RTE_DIM(txr[i].tx_packed_indir));
 628                                 start_dp->addr = txvq->virtio_net_hdr_mem
 629                                         + i * sizeof(*txr)
 630                                         + offsetof(struct virtio_tx_region,
 631                                                    tx_hdr);
 632                                 start_dp->len = hw->vtnet_hdr_size;
 633                         }
 634                 }
 635         }
 636
 637         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 638                 PMD_INIT_LOG(ERR, "setup_queue failed");
 639                 return -EINVAL;
 640         }
 641
 642         return 0;
 643
 644 fail_q_alloc:
 645         rte_free(sw_ring);
 646         rte_memzone_free(hdr_mz);
 647         rte_memzone_free(mz);
 648         rte_free(vq);
 649
 650         return ret;
 651 }
 652
 653 static void
 654 virtio_free_queues(struct virtio_hw *hw)
 655 {
 656         uint16_t nr_vq = virtio_get_nr_vq(hw);
 657         struct virtqueue *vq;
 658         int queue_type;
 659         uint16_t i;
 660
 661         if (hw->vqs == NULL)
 662                 return;
 663
 664         for (i = 0; i < nr_vq; i++) {
 665                 vq = hw->vqs[i];
 666                 if (!vq)
 667                         continue;
 668
 669                 queue_type = virtio_get_queue_type(hw, i);
 670                 if (queue_type == VTNET_RQ) {
 671                         rte_free(vq->sw_ring);
 672                         rte_memzone_free(vq->rxq.mz);
 673                 } else if (queue_type == VTNET_TQ) {
 674                         rte_memzone_free(vq->txq.mz);
 675                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 676                 } else {
 677                         rte_memzone_free(vq->cq.mz);
 678                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 679                 }
 680
 681                 rte_free(vq);
 682                 hw->vqs[i] = NULL;
 683         }
 684
 685         rte_free(hw->vqs);
 686         hw->vqs = NULL;
 687 }
 688
 689 static int
 690 virtio_alloc_queues(struct rte_eth_dev *dev)
 691 {
 692         struct virtio_hw *hw = dev->data->dev_private;
 693         uint16_t nr_vq = virtio_get_nr_vq(hw);
 694         uint16_t i;
 695         int ret;
 696
 697         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 698         if (!hw->vqs) {
 699                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 700                 return -ENOMEM;
 701         }
 702
 703         for (i = 0; i < nr_vq; i++) {
 704                 ret = virtio_init_queue(dev, i);
 705                 if (ret < 0) {
 706                         virtio_free_queues(hw);
 707                         return ret;
 708                 }
 709         }
 710
 711         return 0;
 712 }
 713
 714 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 715
 716 static int
 717 virtio_dev_close(struct rte_eth_dev *dev)
 718 {
 719         struct virtio_hw *hw = dev->data->dev_private;
 720         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 721
 722         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 723         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 724                 return 0;
 725
 726         if (!hw->opened)
 727                 return 0;
 728         hw->opened = false;
 729
 730         /* reset the NIC */
 731         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 732                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 733         if (intr_conf->rxq)
 734                 virtio_queues_unbind_intr(dev);
 735
 736         if (intr_conf->lsc || intr_conf->rxq) {
 737                 virtio_intr_disable(dev);
 738                 rte_intr_efd_disable(dev->intr_handle);
 739                 rte_free(dev->intr_handle->intr_vec);
 740                 dev->intr_handle->intr_vec = NULL;
 741         }
 742
 743         vtpci_reset(hw);
 744         virtio_dev_free_mbufs(dev);
 745         virtio_free_queues(hw);
 746
 747 #ifdef RTE_VIRTIO_USER
 748         if (hw->virtio_user_dev)
 749                 virtio_user_dev_uninit(hw->virtio_user_dev);
 750         else
 751 #endif
 752         if (dev->device) {
 753                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(dev));
 754                 if (!hw->modern)
 755                         rte_pci_ioport_unmap(VTPCI_IO(hw));
 756         }
 757
 758         return 0;
 759 }
 760
 761 static int
 762 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 763 {
 764         struct virtio_hw *hw = dev->data->dev_private;
 765         struct virtio_pmd_ctrl ctrl;
 766         int dlen[1];
 767         int ret;
 768
 769         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 770                 PMD_INIT_LOG(INFO, "host does not support rx control");
 771                 return -ENOTSUP;
 772         }
 773
 774         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 775         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 776         ctrl.data[0] = 1;
 777         dlen[0] = 1;
 778
 779         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 780         if (ret) {
 781                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 782                 return -EAGAIN;
 783         }
 784
 785         return 0;
 786 }
 787
 788 static int
 789 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 790 {
 791         struct virtio_hw *hw = dev->data->dev_private;
 792         struct virtio_pmd_ctrl ctrl;
 793         int dlen[1];
 794         int ret;
 795
 796         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 797                 PMD_INIT_LOG(INFO, "host does not support rx control");
 798                 return -ENOTSUP;
 799         }
 800
 801         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 802         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 803         ctrl.data[0] = 0;
 804         dlen[0] = 1;
 805
 806         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 807         if (ret) {
 808                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 809                 return -EAGAIN;
 810         }
 811
 812         return 0;
 813 }
 814
 815 static int
 816 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 817 {
 818         struct virtio_hw *hw = dev->data->dev_private;
 819         struct virtio_pmd_ctrl ctrl;
 820         int dlen[1];
 821         int ret;
 822
 823         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 824                 PMD_INIT_LOG(INFO, "host does not support rx control");
 825                 return -ENOTSUP;
 826         }
 827
 828         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 829         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 830         ctrl.data[0] = 1;
 831         dlen[0] = 1;
 832
 833         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 834         if (ret) {
 835                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 836                 return -EAGAIN;
 837         }
 838
 839         return 0;
 840 }
 841
 842 static int
 843 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 844 {
 845         struct virtio_hw *hw = dev->data->dev_private;
 846         struct virtio_pmd_ctrl ctrl;
 847         int dlen[1];
 848         int ret;
 849
 850         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 851                 PMD_INIT_LOG(INFO, "host does not support rx control");
 852                 return -ENOTSUP;
 853         }
 854
 855         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 856         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 857         ctrl.data[0] = 0;
 858         dlen[0] = 1;
 859
 860         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 861         if (ret) {
 862                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 863                 return -EAGAIN;
 864         }
 865
 866         return 0;
 867 }
 868
 869 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 870 static int
 871 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 872 {
 873         struct virtio_hw *hw = dev->data->dev_private;
 874         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 875                                  hw->vtnet_hdr_size;
 876         uint32_t frame_size = mtu + ether_hdr_len;
 877         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 878
 879         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 880
 881         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 882                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 883                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 884                 return -EINVAL;
 885         }
 886         return 0;
 887 }
 888
 889 static int
 890 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 891 {
 892         struct virtio_hw *hw = dev->data->dev_private;
 893         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 894         struct virtqueue *vq = rxvq->vq;
 895
 896         virtqueue_enable_intr(vq);
 897         virtio_mb(hw->weak_barriers);
 898         return 0;
 899 }
 900
 901 static int
 902 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 903 {
 904         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 905         struct virtqueue *vq = rxvq->vq;
 906
 907         virtqueue_disable_intr(vq);
 908         return 0;
 909 }
 910
 911 /*
 912  * dev_ops for virtio, bare necessities for basic operation
 913  */
 914 static const struct eth_dev_ops virtio_eth_dev_ops = {
 915         .dev_configure           = virtio_dev_configure,
 916         .dev_start               = virtio_dev_start,
 917         .dev_stop                = virtio_dev_stop,
 918         .dev_close               = virtio_dev_close,
 919         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 920         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 921         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 922         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 923         .mtu_set                 = virtio_mtu_set,
 924         .dev_infos_get           = virtio_dev_info_get,
 925         .stats_get               = virtio_dev_stats_get,
 926         .xstats_get              = virtio_dev_xstats_get,
 927         .xstats_get_names        = virtio_dev_xstats_get_names,
 928         .stats_reset             = virtio_dev_stats_reset,
 929         .xstats_reset            = virtio_dev_stats_reset,
 930         .link_update             = virtio_dev_link_update,
 931         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 932         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 933         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 934         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 935         .rx_queue_release        = virtio_dev_queue_release,
 936         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 937         .tx_queue_release        = virtio_dev_queue_release,
 938         /* collect stats per queue */
 939         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 940         .vlan_filter_set         = virtio_vlan_filter_set,
 941         .mac_addr_add            = virtio_mac_addr_add,
 942         .mac_addr_remove         = virtio_mac_addr_remove,
 943         .mac_addr_set            = virtio_mac_addr_set,
 944 };
 945
 946 /*
 947  * dev_ops for virtio-user in secondary processes, as we just have
 948  * some limited supports currently.
 949  */
 950 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 951         .dev_infos_get           = virtio_dev_info_get,
 952         .stats_get               = virtio_dev_stats_get,
 953         .xstats_get              = virtio_dev_xstats_get,
 954         .xstats_get_names        = virtio_dev_xstats_get_names,
 955         .stats_reset             = virtio_dev_stats_reset,
 956         .xstats_reset            = virtio_dev_stats_reset,
 957         /* collect stats per queue */
 958         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 959 };
 960
 961 static void
 962 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 963 {
 964         unsigned i;
 965
 966         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 967                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 968                 if (txvq == NULL)
 969                         continue;
 970
 971                 stats->opackets += txvq->stats.packets;
 972                 stats->obytes += txvq->stats.bytes;
 973
 974                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 975                         stats->q_opackets[i] = txvq->stats.packets;
 976                         stats->q_obytes[i] = txvq->stats.bytes;
 977                 }
 978         }
 979
 980         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 981                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 982                 if (rxvq == NULL)
 983                         continue;
 984
 985                 stats->ipackets += rxvq->stats.packets;
 986                 stats->ibytes += rxvq->stats.bytes;
 987                 stats->ierrors += rxvq->stats.errors;
 988
 989                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 990                         stats->q_ipackets[i] = rxvq->stats.packets;
 991                         stats->q_ibytes[i] = rxvq->stats.bytes;
 992                 }
 993         }
 994
 995         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 996 }
 997
 998 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 999                                        struct rte_eth_xstat_name *xstats_names,
1000                                        __rte_unused unsigned limit)
1001 {
1002         unsigned i;
1003         unsigned count = 0;
1004         unsigned t;
1005
1006         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1007                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1008
1009         if (xstats_names != NULL) {
1010                 /* Note: limit checked in rte_eth_xstats_names() */
1011
1012                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1013                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1014                         if (rxvq == NULL)
1015                                 continue;
1016                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1017                                 snprintf(xstats_names[count].name,
1018                                         sizeof(xstats_names[count].name),
1019                                         "rx_q%u_%s", i,
1020                                         rte_virtio_rxq_stat_strings[t].name);
1021                                 count++;
1022                         }
1023                 }
1024
1025                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1026                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1027                         if (txvq == NULL)
1028                                 continue;
1029                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1030                                 snprintf(xstats_names[count].name,
1031                                         sizeof(xstats_names[count].name),
1032                                         "tx_q%u_%s", i,
1033                                         rte_virtio_txq_stat_strings[t].name);
1034                                 count++;
1035                         }
1036                 }
1037                 return count;
1038         }
1039         return nstats;
1040 }
1041
1042 static int
1043 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1044                       unsigned n)
1045 {
1046         unsigned i;
1047         unsigned count = 0;
1048
1049         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1050                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1051
1052         if (n < nstats)
1053                 return nstats;
1054
1055         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1056                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1057
1058                 if (rxvq == NULL)
1059                         continue;
1060
1061                 unsigned t;
1062
1063                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1064                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1065                                 rte_virtio_rxq_stat_strings[t].offset);
1066                         xstats[count].id = count;
1067                         count++;
1068                 }
1069         }
1070
1071         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1072                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1073
1074                 if (txvq == NULL)
1075                         continue;
1076
1077                 unsigned t;
1078
1079                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1080                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1081                                 rte_virtio_txq_stat_strings[t].offset);
1082                         xstats[count].id = count;
1083                         count++;
1084                 }
1085         }
1086
1087         return count;
1088 }
1089
1090 static int
1091 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1092 {
1093         virtio_update_stats(dev, stats);
1094
1095         return 0;
1096 }
1097
1098 static int
1099 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1100 {
1101         unsigned int i;
1102
1103         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1104                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1105                 if (txvq == NULL)
1106                         continue;
1107
1108                 txvq->stats.packets = 0;
1109                 txvq->stats.bytes = 0;
1110                 txvq->stats.multicast = 0;
1111                 txvq->stats.broadcast = 0;
1112                 memset(txvq->stats.size_bins, 0,
1113                        sizeof(txvq->stats.size_bins[0]) * 8);
1114         }
1115
1116         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1117                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1118                 if (rxvq == NULL)
1119                         continue;
1120
1121                 rxvq->stats.packets = 0;
1122                 rxvq->stats.bytes = 0;
1123                 rxvq->stats.errors = 0;
1124                 rxvq->stats.multicast = 0;
1125                 rxvq->stats.broadcast = 0;
1126                 memset(rxvq->stats.size_bins, 0,
1127                        sizeof(rxvq->stats.size_bins[0]) * 8);
1128         }
1129
1130         return 0;
1131 }
1132
1133 static void
1134 virtio_set_hwaddr(struct virtio_hw *hw)
1135 {
1136         vtpci_write_dev_config(hw,
1137                         offsetof(struct virtio_net_config, mac),
1138                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1139 }
1140
1141 static void
1142 virtio_get_hwaddr(struct virtio_hw *hw)
1143 {
1144         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1145                 vtpci_read_dev_config(hw,
1146                         offsetof(struct virtio_net_config, mac),
1147                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1148         } else {
1149                 rte_eth_random_addr(&hw->mac_addr[0]);
1150                 virtio_set_hwaddr(hw);
1151         }
1152 }
1153
1154 static int
1155 virtio_mac_table_set(struct virtio_hw *hw,
1156                      const struct virtio_net_ctrl_mac *uc,
1157                      const struct virtio_net_ctrl_mac *mc)
1158 {
1159         struct virtio_pmd_ctrl ctrl;
1160         int err, len[2];
1161
1162         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1163                 PMD_DRV_LOG(INFO, "host does not support mac table");
1164                 return -1;
1165         }
1166
1167         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1168         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1169
1170         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1171         memcpy(ctrl.data, uc, len[0]);
1172
1173         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1174         memcpy(ctrl.data + len[0], mc, len[1]);
1175
1176         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1177         if (err != 0)
1178                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1179         return err;
1180 }
1181
1182 static int
1183 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1184                     uint32_t index, uint32_t vmdq __rte_unused)
1185 {
1186         struct virtio_hw *hw = dev->data->dev_private;
1187         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1188         unsigned int i;
1189         struct virtio_net_ctrl_mac *uc, *mc;
1190
1191         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1192                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1193                 return -EINVAL;
1194         }
1195
1196         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1197                 sizeof(uc->entries));
1198         uc->entries = 0;
1199         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1200                 sizeof(mc->entries));
1201         mc->entries = 0;
1202
1203         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1204                 const struct rte_ether_addr *addr
1205                         = (i == index) ? mac_addr : addrs + i;
1206                 struct virtio_net_ctrl_mac *tbl
1207                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1208
1209                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1210         }
1211
1212         return virtio_mac_table_set(hw, uc, mc);
1213 }
1214
1215 static void
1216 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1217 {
1218         struct virtio_hw *hw = dev->data->dev_private;
1219         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1220         struct virtio_net_ctrl_mac *uc, *mc;
1221         unsigned int i;
1222
1223         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1224                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1225                 return;
1226         }
1227
1228         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1229                 sizeof(uc->entries));
1230         uc->entries = 0;
1231         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1232                 sizeof(mc->entries));
1233         mc->entries = 0;
1234
1235         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1236                 struct virtio_net_ctrl_mac *tbl;
1237
1238                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1239                         continue;
1240
1241                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1242                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1243                         RTE_ETHER_ADDR_LEN);
1244         }
1245
1246         virtio_mac_table_set(hw, uc, mc);
1247 }
1248
1249 static int
1250 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1251 {
1252         struct virtio_hw *hw = dev->data->dev_private;
1253
1254         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1255
1256         /* Use atomic update if available */
1257         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1258                 struct virtio_pmd_ctrl ctrl;
1259                 int len = RTE_ETHER_ADDR_LEN;
1260
1261                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1262                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1263
1264                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1265                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1266         }
1267
1268         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1269                 return -ENOTSUP;
1270
1271         virtio_set_hwaddr(hw);
1272         return 0;
1273 }
1274
1275 static int
1276 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1277 {
1278         struct virtio_hw *hw = dev->data->dev_private;
1279         struct virtio_pmd_ctrl ctrl;
1280         int len;
1281
1282         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1283                 return -ENOTSUP;
1284
1285         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1286         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1287         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1288         len = sizeof(vlan_id);
1289
1290         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1291 }
1292
1293 static int
1294 virtio_intr_unmask(struct rte_eth_dev *dev)
1295 {
1296         struct virtio_hw *hw = dev->data->dev_private;
1297
1298         if (rte_intr_ack(dev->intr_handle) < 0)
1299                 return -1;
1300
1301         if (!hw->virtio_user_dev)
1302                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1303
1304         return 0;
1305 }
1306
1307 static int
1308 virtio_intr_enable(struct rte_eth_dev *dev)
1309 {
1310         struct virtio_hw *hw = dev->data->dev_private;
1311
1312         if (rte_intr_enable(dev->intr_handle) < 0)
1313                 return -1;
1314
1315         if (!hw->virtio_user_dev)
1316                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1317
1318         return 0;
1319 }
1320
1321 static int
1322 virtio_intr_disable(struct rte_eth_dev *dev)
1323 {
1324         struct virtio_hw *hw = dev->data->dev_private;
1325
1326         if (rte_intr_disable(dev->intr_handle) < 0)
1327                 return -1;
1328
1329         if (!hw->virtio_user_dev)
1330                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1331
1332         return 0;
1333 }
1334
1335 static int
1336 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1337 {
1338         uint64_t host_features;
1339
1340         /* Prepare guest_features: feature that driver wants to support */
1341         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1342                 req_features);
1343
1344         /* Read device(host) feature bits */
1345         host_features = VTPCI_OPS(hw)->get_features(hw);
1346         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1347                 host_features);
1348
1349         /* If supported, ensure MTU value is valid before acknowledging it. */
1350         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1351                 struct virtio_net_config config;
1352
1353                 vtpci_read_dev_config(hw,
1354                         offsetof(struct virtio_net_config, mtu),
1355                         &config.mtu, sizeof(config.mtu));
1356
1357                 if (config.mtu < RTE_ETHER_MIN_MTU)
1358                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1359         }
1360
1361         /*
1362          * Negotiate features: Subset of device feature bits are written back
1363          * guest feature bits.
1364          */
1365         hw->guest_features = req_features;
1366         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1367         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1368                 hw->guest_features);
1369
1370         if (hw->modern && !vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1371                 PMD_INIT_LOG(ERR,
1372                         "VIRTIO_F_VERSION_1 features is not enabled.");
1373                 return -1;
1374         }
1375
1376         if (hw->modern || hw->virtio_user_dev) {
1377                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1378                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1379                         PMD_INIT_LOG(ERR,
1380                                 "failed to set FEATURES_OK status!");
1381                         return -1;
1382                 }
1383         }
1384
1385         hw->req_guest_features = req_features;
1386
1387         return 0;
1388 }
1389
1390 int
1391 virtio_dev_pause(struct rte_eth_dev *dev)
1392 {
1393         struct virtio_hw *hw = dev->data->dev_private;
1394
1395         rte_spinlock_lock(&hw->state_lock);
1396
1397         if (hw->started == 0) {
1398                 /* Device is just stopped. */
1399                 rte_spinlock_unlock(&hw->state_lock);
1400                 return -1;
1401         }
1402         hw->started = 0;
1403         /*
1404          * Prevent the worker threads from touching queues to avoid contention,
1405          * 1 ms should be enough for the ongoing Tx function to finish.
1406          */
1407         rte_delay_ms(1);
1408         return 0;
1409 }
1410
1411 /*
1412  * Recover hw state to let the worker threads continue.
1413  */
1414 void
1415 virtio_dev_resume(struct rte_eth_dev *dev)
1416 {
1417         struct virtio_hw *hw = dev->data->dev_private;
1418
1419         hw->started = 1;
1420         rte_spinlock_unlock(&hw->state_lock);
1421 }
1422
1423 /*
1424  * Should be called only after device is paused.
1425  */
1426 int
1427 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1428                 int nb_pkts)
1429 {
1430         struct virtio_hw *hw = dev->data->dev_private;
1431         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1432         int ret;
1433
1434         hw->inject_pkts = tx_pkts;
1435         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1436         hw->inject_pkts = NULL;
1437
1438         return ret;
1439 }
1440
1441 static void
1442 virtio_notify_peers(struct rte_eth_dev *dev)
1443 {
1444         struct virtio_hw *hw = dev->data->dev_private;
1445         struct virtnet_rx *rxvq;
1446         struct rte_mbuf *rarp_mbuf;
1447
1448         if (!dev->data->rx_queues)
1449                 return;
1450
1451         rxvq = dev->data->rx_queues[0];
1452         if (!rxvq)
1453                 return;
1454
1455         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1456                         (struct rte_ether_addr *)hw->mac_addr);
1457         if (rarp_mbuf == NULL) {
1458                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1459                 return;
1460         }
1461
1462         /* If virtio port just stopped, no need to send RARP */
1463         if (virtio_dev_pause(dev) < 0) {
1464                 rte_pktmbuf_free(rarp_mbuf);
1465                 return;
1466         }
1467
1468         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1469         virtio_dev_resume(dev);
1470 }
1471
1472 static void
1473 virtio_ack_link_announce(struct rte_eth_dev *dev)
1474 {
1475         struct virtio_hw *hw = dev->data->dev_private;
1476         struct virtio_pmd_ctrl ctrl;
1477
1478         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1479         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1480
1481         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1482 }
1483
1484 /*
1485  * Process virtio config changed interrupt. Call the callback
1486  * if link state changed, generate gratuitous RARP packet if
1487  * the status indicates an ANNOUNCE.
1488  */
1489 void
1490 virtio_interrupt_handler(void *param)
1491 {
1492         struct rte_eth_dev *dev = param;
1493         struct virtio_hw *hw = dev->data->dev_private;
1494         uint8_t isr;
1495         uint16_t status;
1496
1497         /* Read interrupt status which clears interrupt */
1498         isr = vtpci_isr(hw);
1499         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1500
1501         if (virtio_intr_unmask(dev) < 0)
1502                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1503
1504         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1505                 if (virtio_dev_link_update(dev, 0) == 0)
1506                         rte_eth_dev_callback_process(dev,
1507                                                      RTE_ETH_EVENT_INTR_LSC,
1508                                                      NULL);
1509
1510                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1511                         vtpci_read_dev_config(hw,
1512                                 offsetof(struct virtio_net_config, status),
1513                                 &status, sizeof(status));
1514                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1515                                 virtio_notify_peers(dev);
1516                                 if (hw->cvq)
1517                                         virtio_ack_link_announce(dev);
1518                         }
1519                 }
1520         }
1521 }
1522
1523 /* set rx and tx handlers according to what is supported */
1524 static void
1525 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1526 {
1527         struct virtio_hw *hw = eth_dev->data->dev_private;
1528
1529         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1530         if (vtpci_packed_queue(hw)) {
1531                 PMD_INIT_LOG(INFO,
1532                         "virtio: using packed ring %s Tx path on port %u",
1533                         hw->use_vec_tx ? "vectorized" : "standard",
1534                         eth_dev->data->port_id);
1535                 if (hw->use_vec_tx)
1536                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed_vec;
1537                 else
1538                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1539         } else {
1540                 if (hw->use_inorder_tx) {
1541                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1542                                 eth_dev->data->port_id);
1543                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1544                 } else {
1545                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1546                                 eth_dev->data->port_id);
1547                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1548                 }
1549         }
1550
1551         if (vtpci_packed_queue(hw)) {
1552                 if (hw->use_vec_rx) {
1553                         PMD_INIT_LOG(INFO,
1554                                 "virtio: using packed ring vectorized Rx path on port %u",
1555                                 eth_dev->data->port_id);
1556                         eth_dev->rx_pkt_burst =
1557                                 &virtio_recv_pkts_packed_vec;
1558                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1559                         PMD_INIT_LOG(INFO,
1560                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1561                                 eth_dev->data->port_id);
1562                         eth_dev->rx_pkt_burst =
1563                                 &virtio_recv_mergeable_pkts_packed;
1564                 } else {
1565                         PMD_INIT_LOG(INFO,
1566                                 "virtio: using packed ring standard Rx path on port %u",
1567                                 eth_dev->data->port_id);
1568                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1569                 }
1570         } else {
1571                 if (hw->use_vec_rx) {
1572                         PMD_INIT_LOG(INFO, "virtio: using vectorized Rx path on port %u",
1573                                 eth_dev->data->port_id);
1574                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1575                 } else if (hw->use_inorder_rx) {
1576                         PMD_INIT_LOG(INFO,
1577                                 "virtio: using inorder Rx path on port %u",
1578                                 eth_dev->data->port_id);
1579                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1580                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1581                         PMD_INIT_LOG(INFO,
1582                                 "virtio: using mergeable buffer Rx path on port %u",
1583                                 eth_dev->data->port_id);
1584                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1585                 } else {
1586                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1587                                 eth_dev->data->port_id);
1588                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1589                 }
1590         }
1591
1592 }
1593
1594 /* Only support 1:1 queue/interrupt mapping so far.
1595  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1596  * interrupt vectors (<N+1).
1597  */
1598 static int
1599 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1600 {
1601         uint32_t i;
1602         struct virtio_hw *hw = dev->data->dev_private;
1603
1604         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1605         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1606                 dev->intr_handle->intr_vec[i] = i + 1;
1607                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1608                                                  VIRTIO_MSI_NO_VECTOR) {
1609                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1610                         return -EBUSY;
1611                 }
1612         }
1613
1614         return 0;
1615 }
1616
1617 static void
1618 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1619 {
1620         uint32_t i;
1621         struct virtio_hw *hw = dev->data->dev_private;
1622
1623         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1624         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1625                 VTPCI_OPS(hw)->set_queue_irq(hw,
1626                                              hw->vqs[i * VTNET_CQ],
1627                                              VIRTIO_MSI_NO_VECTOR);
1628 }
1629
1630 static int
1631 virtio_configure_intr(struct rte_eth_dev *dev)
1632 {
1633         struct virtio_hw *hw = dev->data->dev_private;
1634
1635         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1636                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1637                 return -ENOTSUP;
1638         }
1639
1640         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1641                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1642                 return -1;
1643         }
1644
1645         if (!dev->intr_handle->intr_vec) {
1646                 dev->intr_handle->intr_vec =
1647                         rte_zmalloc("intr_vec",
1648                                     hw->max_queue_pairs * sizeof(int), 0);
1649                 if (!dev->intr_handle->intr_vec) {
1650                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1651                                      hw->max_queue_pairs);
1652                         return -ENOMEM;
1653                 }
1654         }
1655
1656         /* Re-register callback to update max_intr */
1657         rte_intr_callback_unregister(dev->intr_handle,
1658                                      virtio_interrupt_handler,
1659                                      dev);
1660         rte_intr_callback_register(dev->intr_handle,
1661                                    virtio_interrupt_handler,
1662                                    dev);
1663
1664         /* DO NOT try to remove this! This function will enable msix, or QEMU
1665          * will encounter SIGSEGV when DRIVER_OK is sent.
1666          * And for legacy devices, this should be done before queue/vec binding
1667          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1668          * (22) will be ignored.
1669          */
1670         if (virtio_intr_enable(dev) < 0) {
1671                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1672                 return -1;
1673         }
1674
1675         if (virtio_queues_bind_intr(dev) < 0) {
1676                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1677                 return -1;
1678         }
1679
1680         return 0;
1681 }
1682 #define DUPLEX_UNKNOWN   0xff
1683 /* reset device and renegotiate features if needed */
1684 static int
1685 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1686 {
1687         struct virtio_hw *hw = eth_dev->data->dev_private;
1688         struct virtio_net_config *config;
1689         struct virtio_net_config local_config;
1690         struct rte_pci_device *pci_dev = NULL;
1691         int ret;
1692
1693         /* Reset the device although not necessary at startup */
1694         vtpci_reset(hw);
1695
1696         if (hw->vqs) {
1697                 virtio_dev_free_mbufs(eth_dev);
1698                 virtio_free_queues(hw);
1699         }
1700
1701         /* Tell the host we've noticed this device. */
1702         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1703
1704         /* Tell the host we've known how to drive the device. */
1705         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1706         if (virtio_negotiate_features(hw, req_features) < 0)
1707                 return -1;
1708
1709         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1710
1711         if (!hw->virtio_user_dev)
1712                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1713
1714         /* If host does not support both status and MSI-X then disable LSC */
1715         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1716             hw->use_msix != VIRTIO_MSIX_NONE)
1717                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1718         else
1719                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1720
1721         /* Setting up rx_header size for the device */
1722         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1723             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1724             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1725                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1726         else
1727                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1728
1729         /* Copy the permanent MAC address to: virtio_hw */
1730         virtio_get_hwaddr(hw);
1731         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1732                         &eth_dev->data->mac_addrs[0]);
1733         PMD_INIT_LOG(DEBUG,
1734                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1735                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1736                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1737
1738         if (hw->speed == ETH_SPEED_NUM_UNKNOWN) {
1739                 if (vtpci_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) {
1740                         config = &local_config;
1741                         vtpci_read_dev_config(hw,
1742                                 offsetof(struct virtio_net_config, speed),
1743                                 &config->speed, sizeof(config->speed));
1744                         vtpci_read_dev_config(hw,
1745                                 offsetof(struct virtio_net_config, duplex),
1746                                 &config->duplex, sizeof(config->duplex));
1747                         hw->speed = config->speed;
1748                         hw->duplex = config->duplex;
1749                 }
1750         }
1751         if (hw->duplex == DUPLEX_UNKNOWN)
1752                 hw->duplex = ETH_LINK_FULL_DUPLEX;
1753         PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d",
1754                 hw->speed, hw->duplex);
1755         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1756                 config = &local_config;
1757
1758                 vtpci_read_dev_config(hw,
1759                         offsetof(struct virtio_net_config, mac),
1760                         &config->mac, sizeof(config->mac));
1761
1762                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1763                         vtpci_read_dev_config(hw,
1764                                 offsetof(struct virtio_net_config, status),
1765                                 &config->status, sizeof(config->status));
1766                 } else {
1767                         PMD_INIT_LOG(DEBUG,
1768                                      "VIRTIO_NET_F_STATUS is not supported");
1769                         config->status = 0;
1770                 }
1771
1772                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1773                         vtpci_read_dev_config(hw,
1774                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1775                                 &config->max_virtqueue_pairs,
1776                                 sizeof(config->max_virtqueue_pairs));
1777                 } else {
1778                         PMD_INIT_LOG(DEBUG,
1779                                      "VIRTIO_NET_F_MQ is not supported");
1780                         config->max_virtqueue_pairs = 1;
1781                 }
1782
1783                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1784
1785                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1786                         vtpci_read_dev_config(hw,
1787                                 offsetof(struct virtio_net_config, mtu),
1788                                 &config->mtu,
1789                                 sizeof(config->mtu));
1790
1791                         /*
1792                          * MTU value has already been checked at negotiation
1793                          * time, but check again in case it has changed since
1794                          * then, which should not happen.
1795                          */
1796                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1797                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1798                                                 config->mtu);
1799                                 return -1;
1800                         }
1801
1802                         hw->max_mtu = config->mtu;
1803                         /* Set initial MTU to maximum one supported by vhost */
1804                         eth_dev->data->mtu = config->mtu;
1805
1806                 } else {
1807                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1808                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1809                 }
1810
1811                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1812                                 config->max_virtqueue_pairs);
1813                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1814                 PMD_INIT_LOG(DEBUG,
1815                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1816                                 config->mac[0], config->mac[1],
1817                                 config->mac[2], config->mac[3],
1818                                 config->mac[4], config->mac[5]);
1819         } else {
1820                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1821                 hw->max_queue_pairs = 1;
1822                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1823                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1824         }
1825
1826         ret = virtio_alloc_queues(eth_dev);
1827         if (ret < 0)
1828                 return ret;
1829
1830         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1831                 if (virtio_configure_intr(eth_dev) < 0) {
1832                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1833                         virtio_free_queues(hw);
1834                         return -1;
1835                 }
1836         }
1837
1838         vtpci_reinit_complete(hw);
1839
1840         if (pci_dev)
1841                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1842                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1843                         pci_dev->id.device_id);
1844
1845         return 0;
1846 }
1847
1848 /*
1849  * Remap the PCI device again (IO port map for legacy device and
1850  * memory map for modern device), so that the secondary process
1851  * could have the PCI initiated correctly.
1852  */
1853 static int
1854 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1855 {
1856         if (hw->modern) {
1857                 /*
1858                  * We don't have to re-parse the PCI config space, since
1859                  * rte_pci_map_device() makes sure the mapped address
1860                  * in secondary process would equal to the one mapped in
1861                  * the primary process: error will be returned if that
1862                  * requirement is not met.
1863                  *
1864                  * That said, we could simply reuse all cap pointers
1865                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1866                  * primary process, which is stored in shared memory.
1867                  */
1868                 if (rte_pci_map_device(pci_dev)) {
1869                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1870                         return -1;
1871                 }
1872         } else {
1873                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1874                         return -1;
1875         }
1876
1877         return 0;
1878 }
1879
1880 static void
1881 virtio_set_vtpci_ops(struct virtio_hw *hw)
1882 {
1883 #ifdef RTE_VIRTIO_USER
1884         if (hw->virtio_user_dev)
1885                 VTPCI_OPS(hw) = &virtio_user_ops;
1886         else
1887 #endif
1888         if (hw->modern)
1889                 VTPCI_OPS(hw) = &modern_ops;
1890         else
1891                 VTPCI_OPS(hw) = &legacy_ops;
1892 }
1893
1894 /*
1895  * This function is based on probe() function in virtio_pci.c
1896  * It returns 0 on success.
1897  */
1898 int
1899 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1900 {
1901         struct virtio_hw *hw = eth_dev->data->dev_private;
1902         uint32_t speed = ETH_SPEED_NUM_UNKNOWN;
1903         int vectorized = 0;
1904         int ret;
1905
1906         if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1907                 PMD_INIT_LOG(ERR,
1908                         "Not sufficient headroom required = %d, avail = %d",
1909                         (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1910                         RTE_PKTMBUF_HEADROOM);
1911
1912                 return -1;
1913         }
1914
1915         eth_dev->dev_ops = &virtio_eth_dev_ops;
1916         eth_dev->rx_descriptor_done = virtio_dev_rx_queue_done;
1917
1918         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1919                 if (!hw->virtio_user_dev) {
1920                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1921                         if (ret)
1922                                 return ret;
1923                 }
1924
1925                 virtio_set_vtpci_ops(hw);
1926                 set_rxtx_funcs(eth_dev);
1927
1928                 return 0;
1929         }
1930         ret = virtio_dev_devargs_parse(eth_dev->device->devargs,
1931                  NULL, &speed, &vectorized);
1932         if (ret < 0)
1933                 return ret;
1934         hw->speed = speed;
1935
1936         /* Allocate memory for storing MAC addresses */
1937         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1938                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1939         if (eth_dev->data->mac_addrs == NULL) {
1940                 PMD_INIT_LOG(ERR,
1941                         "Failed to allocate %d bytes needed to store MAC addresses",
1942                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1943                 return -ENOMEM;
1944         }
1945
1946         hw->port_id = eth_dev->data->port_id;
1947         /* For virtio_user case the hw->virtio_user_dev is populated by
1948          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1949          */
1950         if (!hw->virtio_user_dev) {
1951                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1952                 if (ret)
1953                         goto err_vtpci_init;
1954         }
1955
1956         rte_spinlock_init(&hw->state_lock);
1957
1958         /* reset device and negotiate default features */
1959         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1960         if (ret < 0)
1961                 goto err_virtio_init;
1962
1963         if (vectorized) {
1964                 if (!vtpci_packed_queue(hw)) {
1965                         hw->use_vec_rx = 1;
1966                 } else {
1967 #if !defined(CC_AVX512_SUPPORT)
1968                         PMD_DRV_LOG(INFO,
1969                                 "building environment do not support packed ring vectorized");
1970 #else
1971                         hw->use_vec_rx = 1;
1972                         hw->use_vec_tx = 1;
1973 #endif
1974                 }
1975         }
1976
1977         hw->opened = true;
1978
1979         return 0;
1980
1981 err_virtio_init:
1982         if (!hw->virtio_user_dev) {
1983                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1984                 if (!hw->modern)
1985                         rte_pci_ioport_unmap(VTPCI_IO(hw));
1986         }
1987 err_vtpci_init:
1988         rte_free(eth_dev->data->mac_addrs);
1989         eth_dev->data->mac_addrs = NULL;
1990         return ret;
1991 }
1992
1993 static int
1994 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1995 {
1996         PMD_INIT_FUNC_TRACE();
1997
1998         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1999                 return 0;
2000
2001         virtio_dev_stop(eth_dev);
2002         virtio_dev_close(eth_dev);
2003
2004         eth_dev->dev_ops = NULL;
2005         eth_dev->tx_pkt_burst = NULL;
2006         eth_dev->rx_pkt_burst = NULL;
2007
2008         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
2009
2010         return 0;
2011 }
2012
2013
2014 static int vdpa_check_handler(__rte_unused const char *key,
2015                 const char *value, void *ret_val)
2016 {
2017         if (strcmp(value, "1") == 0)
2018                 *(int *)ret_val = 1;
2019         else
2020                 *(int *)ret_val = 0;
2021
2022         return 0;
2023 }
2024
2025
2026 static uint32_t
2027 virtio_dev_speed_capa_get(uint32_t speed)
2028 {
2029         switch (speed) {
2030         case ETH_SPEED_NUM_10G:
2031                 return ETH_LINK_SPEED_10G;
2032         case ETH_SPEED_NUM_20G:
2033                 return ETH_LINK_SPEED_20G;
2034         case ETH_SPEED_NUM_25G:
2035                 return ETH_LINK_SPEED_25G;
2036         case ETH_SPEED_NUM_40G:
2037                 return ETH_LINK_SPEED_40G;
2038         case ETH_SPEED_NUM_50G:
2039                 return ETH_LINK_SPEED_50G;
2040         case ETH_SPEED_NUM_56G:
2041                 return ETH_LINK_SPEED_56G;
2042         case ETH_SPEED_NUM_100G:
2043                 return ETH_LINK_SPEED_100G;
2044         case ETH_SPEED_NUM_200G:
2045                 return ETH_LINK_SPEED_200G;
2046         default:
2047                 return 0;
2048         }
2049 }
2050
2051 static int vectorized_check_handler(__rte_unused const char *key,
2052                 const char *value, void *ret_val)
2053 {
2054         if (strcmp(value, "1") == 0)
2055                 *(int *)ret_val = 1;
2056         else
2057                 *(int *)ret_val = 0;
2058
2059         return 0;
2060 }
2061
2062 #define VIRTIO_ARG_SPEED      "speed"
2063 #define VIRTIO_ARG_VDPA       "vdpa"
2064 #define VIRTIO_ARG_VECTORIZED "vectorized"
2065
2066
2067 static int
2068 link_speed_handler(const char *key __rte_unused,
2069                 const char *value, void *ret_val)
2070 {
2071         uint32_t val;
2072         if (!value || !ret_val)
2073                 return -EINVAL;
2074         val = strtoul(value, NULL, 0);
2075         /* validate input */
2076         if (virtio_dev_speed_capa_get(val) == 0)
2077                 return -EINVAL;
2078         *(uint32_t *)ret_val = val;
2079
2080         return 0;
2081 }
2082
2083
2084 static int
2085 virtio_dev_devargs_parse(struct rte_devargs *devargs, int *vdpa,
2086         uint32_t *speed, int *vectorized)
2087 {
2088         struct rte_kvargs *kvlist;
2089         int ret = 0;
2090
2091         if (devargs == NULL)
2092                 return 0;
2093
2094         kvlist = rte_kvargs_parse(devargs->args, NULL);
2095         if (kvlist == NULL) {
2096                 PMD_INIT_LOG(ERR, "error when parsing param");
2097                 return 0;
2098         }
2099         if (vdpa && rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) {
2100                 /* vdpa mode selected when there's a key-value pair:
2101                  * vdpa=1
2102                  */
2103                 ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA,
2104                                 vdpa_check_handler, vdpa);
2105                 if (ret < 0) {
2106                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2107                                 VIRTIO_ARG_VDPA);
2108                         goto exit;
2109                 }
2110         }
2111         if (speed && rte_kvargs_count(kvlist, VIRTIO_ARG_SPEED) == 1) {
2112                 ret = rte_kvargs_process(kvlist,
2113                                         VIRTIO_ARG_SPEED,
2114                                         link_speed_handler, speed);
2115                 if (ret < 0) {
2116                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2117                                         VIRTIO_ARG_SPEED);
2118                         goto exit;
2119                 }
2120         }
2121
2122         if (vectorized &&
2123                 rte_kvargs_count(kvlist, VIRTIO_ARG_VECTORIZED) == 1) {
2124                 ret = rte_kvargs_process(kvlist,
2125                                 VIRTIO_ARG_VECTORIZED,
2126                                 vectorized_check_handler, vectorized);
2127                 if (ret < 0) {
2128                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2129                                         VIRTIO_ARG_VECTORIZED);
2130                         goto exit;
2131                 }
2132         }
2133
2134 exit:
2135         rte_kvargs_free(kvlist);
2136         return ret;
2137 }
2138
2139 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
2140         struct rte_pci_device *pci_dev)
2141 {
2142         int vdpa = 0;
2143         int ret = 0;
2144
2145         ret = virtio_dev_devargs_parse(pci_dev->device.devargs, &vdpa, NULL,
2146                 NULL);
2147         if (ret < 0) {
2148                 PMD_INIT_LOG(ERR, "devargs parsing is failed");
2149                 return ret;
2150         }
2151         /* virtio pmd skips probe if device needs to work in vdpa mode */
2152         if (vdpa == 1)
2153                 return 1;
2154
2155         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
2156                 eth_virtio_dev_init);
2157 }
2158
2159 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
2160 {
2161         int ret;
2162
2163         ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
2164         /* Port has already been released by close. */
2165         if (ret == -ENODEV)
2166                 ret = 0;
2167         return ret;
2168 }
2169
2170 static struct rte_pci_driver rte_virtio_pmd = {
2171         .driver = {
2172                 .name = "net_virtio",
2173         },
2174         .id_table = pci_id_virtio_map,
2175         .drv_flags = 0,
2176         .probe = eth_virtio_pci_probe,
2177         .remove = eth_virtio_pci_remove,
2178 };
2179
2180 RTE_INIT(rte_virtio_pmd_init)
2181 {
2182         rte_eal_iopl_init();
2183         rte_pci_register(&rte_virtio_pmd);
2184 }
2185
2186 static bool
2187 rx_offload_enabled(struct virtio_hw *hw)
2188 {
2189         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2190                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2191                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2192 }
2193
2194 static bool
2195 tx_offload_enabled(struct virtio_hw *hw)
2196 {
2197         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2198                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2199                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2200 }
2201
2202 /*
2203  * Configure virtio device
2204  * It returns 0 on success.
2205  */
2206 static int
2207 virtio_dev_configure(struct rte_eth_dev *dev)
2208 {
2209         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2210         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2211         struct virtio_hw *hw = dev->data->dev_private;
2212         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2213                 hw->vtnet_hdr_size;
2214         uint64_t rx_offloads = rxmode->offloads;
2215         uint64_t tx_offloads = txmode->offloads;
2216         uint64_t req_features;
2217         int ret;
2218
2219         PMD_INIT_LOG(DEBUG, "configure");
2220         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2221
2222         if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2223                 PMD_DRV_LOG(ERR,
2224                         "Unsupported Rx multi queue mode %d",
2225                         rxmode->mq_mode);
2226                 return -EINVAL;
2227         }
2228
2229         if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2230                 PMD_DRV_LOG(ERR,
2231                         "Unsupported Tx multi queue mode %d",
2232                         txmode->mq_mode);
2233                 return -EINVAL;
2234         }
2235
2236         if (dev->data->dev_conf.intr_conf.rxq) {
2237                 ret = virtio_init_device(dev, hw->req_guest_features);
2238                 if (ret < 0)
2239                         return ret;
2240         }
2241
2242         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2243                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2244
2245         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2246                            DEV_RX_OFFLOAD_TCP_CKSUM))
2247                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2248
2249         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2250                 req_features |=
2251                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2252                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2253
2254         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2255                            DEV_TX_OFFLOAD_TCP_CKSUM))
2256                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2257
2258         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2259                 req_features |=
2260                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2261                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2262
2263         /* if request features changed, reinit the device */
2264         if (req_features != hw->req_guest_features) {
2265                 ret = virtio_init_device(dev, req_features);
2266                 if (ret < 0)
2267                         return ret;
2268         }
2269
2270         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2271                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2272                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2273                 PMD_DRV_LOG(ERR,
2274                         "rx checksum not available on this host");
2275                 return -ENOTSUP;
2276         }
2277
2278         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2279                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2280                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2281                 PMD_DRV_LOG(ERR,
2282                         "Large Receive Offload not available on this host");
2283                 return -ENOTSUP;
2284         }
2285
2286         /* start control queue */
2287         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2288                 virtio_dev_cq_start(dev);
2289
2290         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2291                 hw->vlan_strip = 1;
2292
2293         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2294             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2295                 PMD_DRV_LOG(ERR,
2296                             "vlan filtering not available on this host");
2297                 return -ENOTSUP;
2298         }
2299
2300         hw->has_tx_offload = tx_offload_enabled(hw);
2301         hw->has_rx_offload = rx_offload_enabled(hw);
2302
2303         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2304                 /* Enable vector (0) for Link State Intrerrupt */
2305                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2306                                 VIRTIO_MSI_NO_VECTOR) {
2307                         PMD_DRV_LOG(ERR, "failed to set config vector");
2308                         return -EBUSY;
2309                 }
2310
2311         if (vtpci_packed_queue(hw)) {
2312 #if defined(RTE_ARCH_X86_64) && defined(CC_AVX512_SUPPORT)
2313                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2314                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
2315                      !vtpci_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2316                      !vtpci_with_feature(hw, VIRTIO_F_VERSION_1))) {
2317                         PMD_DRV_LOG(INFO,
2318                                 "disabled packed ring vectorized path for requirements not met");
2319                         hw->use_vec_rx = 0;
2320                         hw->use_vec_tx = 0;
2321                 }
2322 #else
2323                 hw->use_vec_rx = 0;
2324                 hw->use_vec_tx = 0;
2325 #endif
2326
2327                 if (hw->use_vec_rx) {
2328                         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2329                                 PMD_DRV_LOG(INFO,
2330                                         "disabled packed ring vectorized rx for mrg_rxbuf enabled");
2331                                 hw->use_vec_rx = 0;
2332                         }
2333
2334                         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) {
2335                                 PMD_DRV_LOG(INFO,
2336                                         "disabled packed ring vectorized rx for TCP_LRO enabled");
2337                                 hw->use_vec_rx = 0;
2338                         }
2339                 }
2340         } else {
2341                 if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2342                         hw->use_inorder_tx = 1;
2343                         hw->use_inorder_rx = 1;
2344                         hw->use_vec_rx = 0;
2345                 }
2346
2347                 if (hw->use_vec_rx) {
2348 #if defined RTE_ARCH_ARM
2349                         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2350                                 PMD_DRV_LOG(INFO,
2351                                         "disabled split ring vectorized path for requirement not met");
2352                                 hw->use_vec_rx = 0;
2353                         }
2354 #endif
2355                         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2356                                 PMD_DRV_LOG(INFO,
2357                                         "disabled split ring vectorized rx for mrg_rxbuf enabled");
2358                                 hw->use_vec_rx = 0;
2359                         }
2360
2361                         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2362                                            DEV_RX_OFFLOAD_TCP_CKSUM |
2363                                            DEV_RX_OFFLOAD_TCP_LRO |
2364                                            DEV_RX_OFFLOAD_VLAN_STRIP)) {
2365                                 PMD_DRV_LOG(INFO,
2366                                         "disabled split ring vectorized rx for offloading enabled");
2367                                 hw->use_vec_rx = 0;
2368                         }
2369                 }
2370         }
2371
2372         return 0;
2373 }
2374
2375
2376 static int
2377 virtio_dev_start(struct rte_eth_dev *dev)
2378 {
2379         uint16_t nb_queues, i;
2380         struct virtnet_rx *rxvq;
2381         struct virtnet_tx *txvq __rte_unused;
2382         struct virtio_hw *hw = dev->data->dev_private;
2383         int ret;
2384
2385         /* Finish the initialization of the queues */
2386         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2387                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2388                 if (ret < 0)
2389                         return ret;
2390         }
2391         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2392                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2393                 if (ret < 0)
2394                         return ret;
2395         }
2396
2397         /* check if lsc interrupt feature is enabled */
2398         if (dev->data->dev_conf.intr_conf.lsc) {
2399                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2400                         PMD_DRV_LOG(ERR, "link status not supported by host");
2401                         return -ENOTSUP;
2402                 }
2403         }
2404
2405         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2406          * in device configure, but it could be unmapped  when device is
2407          * stopped.
2408          */
2409         if (dev->data->dev_conf.intr_conf.lsc ||
2410             dev->data->dev_conf.intr_conf.rxq) {
2411                 virtio_intr_disable(dev);
2412
2413                 /* Setup interrupt callback  */
2414                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2415                         rte_intr_callback_register(dev->intr_handle,
2416                                                    virtio_interrupt_handler,
2417                                                    dev);
2418
2419                 if (virtio_intr_enable(dev) < 0) {
2420                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2421                         return -EIO;
2422                 }
2423         }
2424
2425         /*Notify the backend
2426          *Otherwise the tap backend might already stop its queue due to fullness.
2427          *vhost backend will have no chance to be waked up
2428          */
2429         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2430         if (hw->max_queue_pairs > 1) {
2431                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2432                         return -EINVAL;
2433         }
2434
2435         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2436
2437         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2438                 rxvq = dev->data->rx_queues[i];
2439                 /* Flush the old packets */
2440                 virtqueue_rxvq_flush(rxvq->vq);
2441                 virtqueue_notify(rxvq->vq);
2442         }
2443
2444         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2445                 txvq = dev->data->tx_queues[i];
2446                 virtqueue_notify(txvq->vq);
2447         }
2448
2449         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2450
2451         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2452                 rxvq = dev->data->rx_queues[i];
2453                 VIRTQUEUE_DUMP(rxvq->vq);
2454         }
2455
2456         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2457                 txvq = dev->data->tx_queues[i];
2458                 VIRTQUEUE_DUMP(txvq->vq);
2459         }
2460
2461         set_rxtx_funcs(dev);
2462         hw->started = true;
2463
2464         /* Initialize Link state */
2465         virtio_dev_link_update(dev, 0);
2466
2467         return 0;
2468 }
2469
2470 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2471 {
2472         struct virtio_hw *hw = dev->data->dev_private;
2473         uint16_t nr_vq = virtio_get_nr_vq(hw);
2474         const char *type __rte_unused;
2475         unsigned int i, mbuf_num = 0;
2476         struct virtqueue *vq;
2477         struct rte_mbuf *buf;
2478         int queue_type;
2479
2480         if (hw->vqs == NULL)
2481                 return;
2482
2483         for (i = 0; i < nr_vq; i++) {
2484                 vq = hw->vqs[i];
2485                 if (!vq)
2486                         continue;
2487
2488                 queue_type = virtio_get_queue_type(hw, i);
2489                 if (queue_type == VTNET_RQ)
2490                         type = "rxq";
2491                 else if (queue_type == VTNET_TQ)
2492                         type = "txq";
2493                 else
2494                         continue;
2495
2496                 PMD_INIT_LOG(DEBUG,
2497                         "Before freeing %s[%d] used and unused buf",
2498                         type, i);
2499                 VIRTQUEUE_DUMP(vq);
2500
2501                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2502                         rte_pktmbuf_free(buf);
2503                         mbuf_num++;
2504                 }
2505
2506                 PMD_INIT_LOG(DEBUG,
2507                         "After freeing %s[%d] used and unused buf",
2508                         type, i);
2509                 VIRTQUEUE_DUMP(vq);
2510         }
2511
2512         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2513 }
2514
2515 /*
2516  * Stop device: disable interrupt and mark link down
2517  */
2518 static void
2519 virtio_dev_stop(struct rte_eth_dev *dev)
2520 {
2521         struct virtio_hw *hw = dev->data->dev_private;
2522         struct rte_eth_link link;
2523         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2524
2525         PMD_INIT_LOG(DEBUG, "stop");
2526
2527         rte_spinlock_lock(&hw->state_lock);
2528         if (!hw->started)
2529                 goto out_unlock;
2530         hw->started = false;
2531
2532         if (intr_conf->lsc || intr_conf->rxq) {
2533                 virtio_intr_disable(dev);
2534
2535                 /* Reset interrupt callback  */
2536                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2537                         rte_intr_callback_unregister(dev->intr_handle,
2538                                                      virtio_interrupt_handler,
2539                                                      dev);
2540                 }
2541         }
2542
2543         memset(&link, 0, sizeof(link));
2544         rte_eth_linkstatus_set(dev, &link);
2545 out_unlock:
2546         rte_spinlock_unlock(&hw->state_lock);
2547 }
2548
2549 static int
2550 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2551 {
2552         struct rte_eth_link link;
2553         uint16_t status;
2554         struct virtio_hw *hw = dev->data->dev_private;
2555
2556         memset(&link, 0, sizeof(link));
2557         link.link_duplex = hw->duplex;
2558         link.link_speed  = hw->speed;
2559         link.link_autoneg = ETH_LINK_AUTONEG;
2560
2561         if (!hw->started) {
2562                 link.link_status = ETH_LINK_DOWN;
2563                 link.link_speed = ETH_SPEED_NUM_NONE;
2564         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2565                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2566                 vtpci_read_dev_config(hw,
2567                                 offsetof(struct virtio_net_config, status),
2568                                 &status, sizeof(status));
2569                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2570                         link.link_status = ETH_LINK_DOWN;
2571                         link.link_speed = ETH_SPEED_NUM_NONE;
2572                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2573                                      dev->data->port_id);
2574                 } else {
2575                         link.link_status = ETH_LINK_UP;
2576                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2577                                      dev->data->port_id);
2578                 }
2579         } else {
2580                 link.link_status = ETH_LINK_UP;
2581         }
2582
2583         return rte_eth_linkstatus_set(dev, &link);
2584 }
2585
2586 static int
2587 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2588 {
2589         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2590         struct virtio_hw *hw = dev->data->dev_private;
2591         uint64_t offloads = rxmode->offloads;
2592
2593         if (mask & ETH_VLAN_FILTER_MASK) {
2594                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2595                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2596
2597                         PMD_DRV_LOG(NOTICE,
2598                                 "vlan filtering not available on this host");
2599
2600                         return -ENOTSUP;
2601                 }
2602         }
2603
2604         if (mask & ETH_VLAN_STRIP_MASK)
2605                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2606
2607         return 0;
2608 }
2609
2610 static int
2611 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2612 {
2613         uint64_t tso_mask, host_features;
2614         struct virtio_hw *hw = dev->data->dev_private;
2615         dev_info->speed_capa = virtio_dev_speed_capa_get(hw->speed);
2616
2617         dev_info->max_rx_queues =
2618                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2619         dev_info->max_tx_queues =
2620                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2621         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2622         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2623         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2624
2625         host_features = VTPCI_OPS(hw)->get_features(hw);
2626         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2627         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2628         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2629                 dev_info->rx_offload_capa |=
2630                         DEV_RX_OFFLOAD_TCP_CKSUM |
2631                         DEV_RX_OFFLOAD_UDP_CKSUM;
2632         }
2633         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2634                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2635         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2636                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2637         if ((host_features & tso_mask) == tso_mask)
2638                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2639
2640         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2641                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2642         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2643                 dev_info->tx_offload_capa |=
2644                         DEV_TX_OFFLOAD_UDP_CKSUM |
2645                         DEV_TX_OFFLOAD_TCP_CKSUM;
2646         }
2647         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2648                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2649         if ((host_features & tso_mask) == tso_mask)
2650                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2651
2652         return 0;
2653 }
2654
2655 /*
2656  * It enables testpmd to collect per queue stats.
2657  */
2658 static int
2659 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2660 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2661 __rte_unused uint8_t is_rx)
2662 {
2663         return 0;
2664 }
2665
2666 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2667 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2668 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2669 RTE_LOG_REGISTER(virtio_logtype_init, pmd.net.virtio.init, NOTICE);
2670 RTE_LOG_REGISTER(virtio_logtype_driver, pmd.net.virtio.driver, NOTICE);