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 <ethdev_driver.h>
  12 #include <rte_memcpy.h>
  13 #include <rte_string_fns.h>
  14 #include <rte_memzone.h>
  15 #include <rte_malloc.h>
  16 #include <rte_branch_prediction.h>
  17 #include <rte_ether.h>
  18 #include <rte_ip.h>
  19 #include <rte_arp.h>
  20 #include <rte_common.h>
  21 #include <rte_errno.h>
  22 #include <rte_cpuflags.h>
  23 #include <rte_vect.h>
  24 #include <rte_memory.h>
  25 #include <rte_eal_paging.h>
  26 #include <rte_eal.h>
  27 #include <rte_dev.h>
  28 #include <rte_cycles.h>
  29 #include <rte_kvargs.h>
  30
  31 #include "virtio_ethdev.h"
  32 #include "virtio.h"
  33 #include "virtio_logs.h"
  34 #include "virtqueue.h"
  35 #include "virtio_rxtx.h"
  36 #include "virtio_user/virtio_user_dev.h"
  37
  38 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  39 static int  virtio_dev_start(struct rte_eth_dev *dev);
  40 static int virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  41 static int virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  42 static int virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  43 static int virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  44 static uint32_t virtio_dev_speed_capa_get(uint32_t speed);
  45 static int virtio_dev_devargs_parse(struct rte_devargs *devargs,
  46         uint32_t *speed,
  47         int *vectorized);
  48 static int virtio_dev_info_get(struct rte_eth_dev *dev,
  49                                 struct rte_eth_dev_info *dev_info);
  50 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  51         int wait_to_complete);
  52 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  53
  54 static void virtio_set_hwaddr(struct virtio_hw *hw);
  55 static void virtio_get_hwaddr(struct virtio_hw *hw);
  56
  57 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  58                                  struct rte_eth_stats *stats);
  59 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  60                                  struct rte_eth_xstat *xstats, unsigned n);
  61 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  62                                        struct rte_eth_xstat_name *xstats_names,
  63                                        unsigned limit);
  64 static int virtio_dev_stats_reset(struct rte_eth_dev *dev);
  65 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  66 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  67                                 uint16_t vlan_id, int on);
  68 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  69                                 struct rte_ether_addr *mac_addr,
  70                                 uint32_t index, uint32_t vmdq);
  71 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  72 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
  73                                 struct rte_ether_addr *mac_addr);
  74
  75 static int virtio_intr_disable(struct rte_eth_dev *dev);
  76
  77 static int virtio_dev_queue_stats_mapping_set(
  78         struct rte_eth_dev *eth_dev,
  79         uint16_t queue_id,
  80         uint8_t stat_idx,
  81         uint8_t is_rx);
  82
  83 static void virtio_notify_peers(struct rte_eth_dev *dev);
  84 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  85
  86 struct rte_virtio_xstats_name_off {
  87         char name[RTE_ETH_XSTATS_NAME_SIZE];
  88         unsigned offset;
  89 };
  90
  91 /* [rt]x_qX_ is prepended to the name string here */
  92 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
  93         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
  94         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
  95         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
  96         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
  97         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
  98         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
  99         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 100         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 101         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 102         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 103         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 104         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 105         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 106 };
 107
 108 /* [rt]x_qX_ is prepended to the name string here */
 109 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 110         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 111         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 112         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 113         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 114         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 115         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 116         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 117         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 118         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 119         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 120         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 121         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 122 };
 123
 124 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 125                             sizeof(rte_virtio_rxq_stat_strings[0]))
 126 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 127                             sizeof(rte_virtio_txq_stat_strings[0]))
 128
 129 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 130
 131 static struct virtio_pmd_ctrl *
 132 virtio_send_command_packed(struct virtnet_ctl *cvq,
 133                            struct virtio_pmd_ctrl *ctrl,
 134                            int *dlen, int pkt_num)
 135 {
 136         struct virtqueue *vq = virtnet_cq_to_vq(cvq);
 137         int head;
 138         struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
 139         struct virtio_pmd_ctrl *result;
 140         uint16_t flags;
 141         int sum = 0;
 142         int nb_descs = 0;
 143         int k;
 144
 145         /*
 146          * Format is enforced in qemu code:
 147          * One TX packet for header;
 148          * At least one TX packet per argument;
 149          * One RX packet for ACK.
 150          */
 151         head = vq->vq_avail_idx;
 152         flags = vq->vq_packed.cached_flags;
 153         desc[head].addr = cvq->virtio_net_hdr_mem;
 154         desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 155         vq->vq_free_cnt--;
 156         nb_descs++;
 157         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 158                 vq->vq_avail_idx -= vq->vq_nentries;
 159                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 160         }
 161
 162         for (k = 0; k < pkt_num; k++) {
 163                 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 164                         + sizeof(struct virtio_net_ctrl_hdr)
 165                         + sizeof(ctrl->status) + sizeof(uint8_t) * sum;
 166                 desc[vq->vq_avail_idx].len = dlen[k];
 167                 desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
 168                         vq->vq_packed.cached_flags;
 169                 sum += dlen[k];
 170                 vq->vq_free_cnt--;
 171                 nb_descs++;
 172                 if (++vq->vq_avail_idx >= vq->vq_nentries) {
 173                         vq->vq_avail_idx -= vq->vq_nentries;
 174                         vq->vq_packed.cached_flags ^=
 175                                 VRING_PACKED_DESC_F_AVAIL_USED;
 176                 }
 177         }
 178
 179         desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 180                 + sizeof(struct virtio_net_ctrl_hdr);
 181         desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
 182         desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
 183                 vq->vq_packed.cached_flags;
 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 ^= VRING_PACKED_DESC_F_AVAIL_USED;
 189         }
 190
 191         virtqueue_store_flags_packed(&desc[head], VRING_DESC_F_NEXT | flags,
 192                         vq->hw->weak_barriers);
 193
 194         virtio_wmb(vq->hw->weak_barriers);
 195         virtqueue_notify(vq);
 196
 197         /* wait for used desc in virtqueue
 198          * desc_is_used has a load-acquire or rte_io_rmb inside
 199          */
 200         while (!desc_is_used(&desc[head], vq))
 201                 usleep(100);
 202
 203         /* now get used descriptors */
 204         vq->vq_free_cnt += nb_descs;
 205         vq->vq_used_cons_idx += nb_descs;
 206         if (vq->vq_used_cons_idx >= vq->vq_nentries) {
 207                 vq->vq_used_cons_idx -= vq->vq_nentries;
 208                 vq->vq_packed.used_wrap_counter ^= 1;
 209         }
 210
 211         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
 212                         "vq->vq_avail_idx=%d\n"
 213                         "vq->vq_used_cons_idx=%d\n"
 214                         "vq->vq_packed.cached_flags=0x%x\n"
 215                         "vq->vq_packed.used_wrap_counter=%d\n",
 216                         vq->vq_free_cnt,
 217                         vq->vq_avail_idx,
 218                         vq->vq_used_cons_idx,
 219                         vq->vq_packed.cached_flags,
 220                         vq->vq_packed.used_wrap_counter);
 221
 222         result = cvq->virtio_net_hdr_mz->addr;
 223         return result;
 224 }
 225
 226 static struct virtio_pmd_ctrl *
 227 virtio_send_command_split(struct virtnet_ctl *cvq,
 228                           struct virtio_pmd_ctrl *ctrl,
 229                           int *dlen, int pkt_num)
 230 {
 231         struct virtio_pmd_ctrl *result;
 232         struct virtqueue *vq = virtnet_cq_to_vq(cvq);
 233         uint32_t head, i;
 234         int k, sum = 0;
 235
 236         head = vq->vq_desc_head_idx;
 237
 238         /*
 239          * Format is enforced in qemu code:
 240          * One TX packet for header;
 241          * At least one TX packet per argument;
 242          * One RX packet for ACK.
 243          */
 244         vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
 245         vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 246         vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 247         vq->vq_free_cnt--;
 248         i = vq->vq_split.ring.desc[head].next;
 249
 250         for (k = 0; k < pkt_num; k++) {
 251                 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
 252                 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 253                         + sizeof(struct virtio_net_ctrl_hdr)
 254                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 255                 vq->vq_split.ring.desc[i].len = dlen[k];
 256                 sum += dlen[k];
 257                 vq->vq_free_cnt--;
 258                 i = vq->vq_split.ring.desc[i].next;
 259         }
 260
 261         vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
 262         vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 263                         + sizeof(struct virtio_net_ctrl_hdr);
 264         vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
 265         vq->vq_free_cnt--;
 266
 267         vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
 268
 269         vq_update_avail_ring(vq, head);
 270         vq_update_avail_idx(vq);
 271
 272         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 273
 274         virtqueue_notify(vq);
 275
 276         while (virtqueue_nused(vq) == 0)
 277                 usleep(100);
 278
 279         while (virtqueue_nused(vq)) {
 280                 uint32_t idx, desc_idx, used_idx;
 281                 struct vring_used_elem *uep;
 282
 283                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 284                                 & (vq->vq_nentries - 1));
 285                 uep = &vq->vq_split.ring.used->ring[used_idx];
 286                 idx = (uint32_t) uep->id;
 287                 desc_idx = idx;
 288
 289                 while (vq->vq_split.ring.desc[desc_idx].flags &
 290                                 VRING_DESC_F_NEXT) {
 291                         desc_idx = vq->vq_split.ring.desc[desc_idx].next;
 292                         vq->vq_free_cnt++;
 293                 }
 294
 295                 vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 296                 vq->vq_desc_head_idx = idx;
 297
 298                 vq->vq_used_cons_idx++;
 299                 vq->vq_free_cnt++;
 300         }
 301
 302         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 303                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 304
 305         result = cvq->virtio_net_hdr_mz->addr;
 306         return result;
 307 }
 308
 309 static int
 310 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 311                     int *dlen, int pkt_num)
 312 {
 313         virtio_net_ctrl_ack status = ~0;
 314         struct virtio_pmd_ctrl *result;
 315         struct virtqueue *vq;
 316
 317         ctrl->status = status;
 318
 319         if (!cvq) {
 320                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 321                 return -1;
 322         }
 323
 324         rte_spinlock_lock(&cvq->lock);
 325         vq = virtnet_cq_to_vq(cvq);
 326
 327         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 328                 "vq->hw->cvq = %p vq = %p",
 329                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 330
 331         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 332                 rte_spinlock_unlock(&cvq->lock);
 333                 return -1;
 334         }
 335
 336         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 337                 sizeof(struct virtio_pmd_ctrl));
 338
 339         if (virtio_with_packed_queue(vq->hw))
 340                 result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
 341         else
 342                 result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
 343
 344         rte_spinlock_unlock(&cvq->lock);
 345         return result->status;
 346 }
 347
 348 static int
 349 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 350 {
 351         struct virtio_hw *hw = dev->data->dev_private;
 352         struct virtio_pmd_ctrl ctrl;
 353         int dlen[1];
 354         int ret;
 355
 356         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 357         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 358         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 359
 360         dlen[0] = sizeof(uint16_t);
 361
 362         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 363         if (ret) {
 364                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 365                           "failed, this is too late now...");
 366                 return -EINVAL;
 367         }
 368
 369         return 0;
 370 }
 371
 372 static void
 373 virtio_dev_queue_release(void *queue __rte_unused)
 374 {
 375         /* do nothing */
 376 }
 377
 378 static uint16_t
 379 virtio_get_nr_vq(struct virtio_hw *hw)
 380 {
 381         uint16_t nr_vq = hw->max_queue_pairs * 2;
 382
 383         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 384                 nr_vq += 1;
 385
 386         return nr_vq;
 387 }
 388
 389 static void
 390 virtio_init_vring(struct virtqueue *vq)
 391 {
 392         int size = vq->vq_nentries;
 393         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 394
 395         PMD_INIT_FUNC_TRACE();
 396
 397         memset(ring_mem, 0, vq->vq_ring_size);
 398
 399         vq->vq_used_cons_idx = 0;
 400         vq->vq_desc_head_idx = 0;
 401         vq->vq_avail_idx = 0;
 402         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 403         vq->vq_free_cnt = vq->vq_nentries;
 404         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 405         if (virtio_with_packed_queue(vq->hw)) {
 406                 vring_init_packed(&vq->vq_packed.ring, ring_mem,
 407                                   VIRTIO_VRING_ALIGN, size);
 408                 vring_desc_init_packed(vq, size);
 409         } else {
 410                 struct vring *vr = &vq->vq_split.ring;
 411
 412                 vring_init_split(vr, ring_mem, VIRTIO_VRING_ALIGN, size);
 413                 vring_desc_init_split(vr->desc, size);
 414         }
 415         /*
 416          * Disable device(host) interrupting guest
 417          */
 418         virtqueue_disable_intr(vq);
 419 }
 420
 421 static int
 422 virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
 423 {
 424         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 425         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 426         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 427         unsigned int vq_size, size;
 428         struct virtio_hw *hw = dev->data->dev_private;
 429         struct virtnet_rx *rxvq = NULL;
 430         struct virtnet_tx *txvq = NULL;
 431         struct virtnet_ctl *cvq = NULL;
 432         struct virtqueue *vq;
 433         size_t sz_hdr_mz = 0;
 434         void *sw_ring = NULL;
 435         int queue_type = virtio_get_queue_type(hw, queue_idx);
 436         int ret;
 437         int numa_node = dev->device->numa_node;
 438         struct rte_mbuf *fake_mbuf = NULL;
 439
 440         PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
 441                         queue_idx, numa_node);
 442
 443         /*
 444          * Read the virtqueue size from the Queue Size field
 445          * Always power of 2 and if 0 virtqueue does not exist
 446          */
 447         vq_size = VIRTIO_OPS(hw)->get_queue_num(hw, queue_idx);
 448         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 449         if (vq_size == 0) {
 450                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 451                 return -EINVAL;
 452         }
 453
 454         if (!virtio_with_packed_queue(hw) && !rte_is_power_of_2(vq_size)) {
 455                 PMD_INIT_LOG(ERR, "split virtqueue size is not power of 2");
 456                 return -EINVAL;
 457         }
 458
 459         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 460                  dev->data->port_id, queue_idx);
 461
 462         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 463                                 vq_size * sizeof(struct vq_desc_extra),
 464                                 RTE_CACHE_LINE_SIZE);
 465         if (queue_type == VTNET_TQ) {
 466                 /*
 467                  * For each xmit packet, allocate a virtio_net_hdr
 468                  * and indirect ring elements
 469                  */
 470                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 471         } else if (queue_type == VTNET_CQ) {
 472                 /* Allocate a page for control vq command, data and status */
 473                 sz_hdr_mz = rte_mem_page_size();
 474         }
 475
 476         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 477                                 numa_node);
 478         if (vq == NULL) {
 479                 PMD_INIT_LOG(ERR, "can not allocate vq");
 480                 return -ENOMEM;
 481         }
 482         hw->vqs[queue_idx] = vq;
 483
 484         vq->hw = hw;
 485         vq->vq_queue_index = queue_idx;
 486         vq->vq_nentries = vq_size;
 487         if (virtio_with_packed_queue(hw)) {
 488                 vq->vq_packed.used_wrap_counter = 1;
 489                 vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
 490                 vq->vq_packed.event_flags_shadow = 0;
 491                 if (queue_type == VTNET_RQ)
 492                         vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
 493         }
 494
 495         /*
 496          * Reserve a memzone for vring elements
 497          */
 498         size = vring_size(hw, vq_size, VIRTIO_VRING_ALIGN);
 499         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_VRING_ALIGN);
 500         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 501                      size, vq->vq_ring_size);
 502
 503         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 504                         numa_node, RTE_MEMZONE_IOVA_CONTIG,
 505                         VIRTIO_VRING_ALIGN);
 506         if (mz == NULL) {
 507                 if (rte_errno == EEXIST)
 508                         mz = rte_memzone_lookup(vq_name);
 509                 if (mz == NULL) {
 510                         ret = -ENOMEM;
 511                         goto free_vq;
 512                 }
 513         }
 514
 515         memset(mz->addr, 0, mz->len);
 516
 517         vq->vq_ring_mem = mz->iova;
 518         vq->vq_ring_virt_mem = mz->addr;
 519         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 520                      (uint64_t)mz->iova);
 521         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 522                      (uint64_t)(uintptr_t)mz->addr);
 523
 524         virtio_init_vring(vq);
 525
 526         if (sz_hdr_mz) {
 527                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 528                          dev->data->port_id, queue_idx);
 529                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 530                                 numa_node, RTE_MEMZONE_IOVA_CONTIG,
 531                                 RTE_CACHE_LINE_SIZE);
 532                 if (hdr_mz == NULL) {
 533                         if (rte_errno == EEXIST)
 534                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 535                         if (hdr_mz == NULL) {
 536                                 ret = -ENOMEM;
 537                                 goto free_mz;
 538                         }
 539                 }
 540         }
 541
 542         if (queue_type == VTNET_RQ) {
 543                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 544                                sizeof(vq->sw_ring[0]);
 545
 546                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 547                                 RTE_CACHE_LINE_SIZE, numa_node);
 548                 if (!sw_ring) {
 549                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 550                         ret = -ENOMEM;
 551                         goto free_hdr_mz;
 552                 }
 553
 554                 fake_mbuf = rte_zmalloc_socket("sw_ring", sizeof(*fake_mbuf),
 555                                 RTE_CACHE_LINE_SIZE, numa_node);
 556                 if (!fake_mbuf) {
 557                         PMD_INIT_LOG(ERR, "can not allocate fake mbuf");
 558                         ret = -ENOMEM;
 559                         goto free_sw_ring;
 560                 }
 561
 562                 vq->sw_ring = sw_ring;
 563                 rxvq = &vq->rxq;
 564                 rxvq->port_id = dev->data->port_id;
 565                 rxvq->mz = mz;
 566                 rxvq->fake_mbuf = fake_mbuf;
 567         } else if (queue_type == VTNET_TQ) {
 568                 txvq = &vq->txq;
 569                 txvq->port_id = dev->data->port_id;
 570                 txvq->mz = mz;
 571                 txvq->virtio_net_hdr_mz = hdr_mz;
 572                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 573         } else if (queue_type == VTNET_CQ) {
 574                 cvq = &vq->cq;
 575                 cvq->mz = mz;
 576                 cvq->virtio_net_hdr_mz = hdr_mz;
 577                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 578                 memset(cvq->virtio_net_hdr_mz->addr, 0, rte_mem_page_size());
 579
 580                 hw->cvq = cvq;
 581         }
 582
 583         if (queue_type == VTNET_TQ) {
 584                 struct virtio_tx_region *txr;
 585                 unsigned int i;
 586
 587                 txr = hdr_mz->addr;
 588                 memset(txr, 0, vq_size * sizeof(*txr));
 589                 for (i = 0; i < vq_size; i++) {
 590                         /* first indirect descriptor is always the tx header */
 591                         if (!virtio_with_packed_queue(hw)) {
 592                                 struct vring_desc *start_dp = txr[i].tx_indir;
 593                                 vring_desc_init_split(start_dp,
 594                                                       RTE_DIM(txr[i].tx_indir));
 595                                 start_dp->addr = txvq->virtio_net_hdr_mem
 596                                         + i * sizeof(*txr)
 597                                         + offsetof(struct virtio_tx_region,
 598                                                    tx_hdr);
 599                                 start_dp->len = hw->vtnet_hdr_size;
 600                                 start_dp->flags = VRING_DESC_F_NEXT;
 601                         } else {
 602                                 struct vring_packed_desc *start_dp =
 603                                         txr[i].tx_packed_indir;
 604                                 vring_desc_init_indirect_packed(start_dp,
 605                                       RTE_DIM(txr[i].tx_packed_indir));
 606                                 start_dp->addr = txvq->virtio_net_hdr_mem
 607                                         + i * sizeof(*txr)
 608                                         + offsetof(struct virtio_tx_region,
 609                                                    tx_hdr);
 610                                 start_dp->len = hw->vtnet_hdr_size;
 611                         }
 612                 }
 613         }
 614
 615         if (VIRTIO_OPS(hw)->setup_queue(hw, vq) < 0) {
 616                 PMD_INIT_LOG(ERR, "setup_queue failed");
 617                 ret = -EINVAL;
 618                 goto clean_vq;
 619         }
 620
 621         return 0;
 622
 623 clean_vq:
 624         hw->cvq = NULL;
 625         rte_free(fake_mbuf);
 626 free_sw_ring:
 627         rte_free(sw_ring);
 628 free_hdr_mz:
 629         rte_memzone_free(hdr_mz);
 630 free_mz:
 631         rte_memzone_free(mz);
 632 free_vq:
 633         rte_free(vq);
 634
 635         return ret;
 636 }
 637
 638 static void
 639 virtio_free_queues(struct virtio_hw *hw)
 640 {
 641         uint16_t nr_vq = virtio_get_nr_vq(hw);
 642         struct virtqueue *vq;
 643         int queue_type;
 644         uint16_t i;
 645
 646         if (hw->vqs == NULL)
 647                 return;
 648
 649         for (i = 0; i < nr_vq; i++) {
 650                 vq = hw->vqs[i];
 651                 if (!vq)
 652                         continue;
 653
 654                 queue_type = virtio_get_queue_type(hw, i);
 655                 if (queue_type == VTNET_RQ) {
 656                         rte_free(vq->rxq.fake_mbuf);
 657                         rte_free(vq->sw_ring);
 658                         rte_memzone_free(vq->rxq.mz);
 659                 } else if (queue_type == VTNET_TQ) {
 660                         rte_memzone_free(vq->txq.mz);
 661                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 662                 } else {
 663                         rte_memzone_free(vq->cq.mz);
 664                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 665                 }
 666
 667                 rte_free(vq);
 668                 hw->vqs[i] = NULL;
 669         }
 670
 671         rte_free(hw->vqs);
 672         hw->vqs = NULL;
 673 }
 674
 675 static int
 676 virtio_alloc_queues(struct rte_eth_dev *dev)
 677 {
 678         struct virtio_hw *hw = dev->data->dev_private;
 679         uint16_t nr_vq = virtio_get_nr_vq(hw);
 680         uint16_t i;
 681         int ret;
 682
 683         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 684         if (!hw->vqs) {
 685                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 686                 return -ENOMEM;
 687         }
 688
 689         for (i = 0; i < nr_vq; i++) {
 690                 ret = virtio_init_queue(dev, i);
 691                 if (ret < 0) {
 692                         virtio_free_queues(hw);
 693                         return ret;
 694                 }
 695         }
 696
 697         return 0;
 698 }
 699
 700 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 701
 702 int
 703 virtio_dev_close(struct rte_eth_dev *dev)
 704 {
 705         struct virtio_hw *hw = dev->data->dev_private;
 706         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 707
 708         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 709         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 710                 return 0;
 711
 712         if (!hw->opened)
 713                 return 0;
 714         hw->opened = 0;
 715
 716         /* reset the NIC */
 717         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 718                 VIRTIO_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 719         if (intr_conf->rxq)
 720                 virtio_queues_unbind_intr(dev);
 721
 722         if (intr_conf->lsc || intr_conf->rxq) {
 723                 virtio_intr_disable(dev);
 724                 rte_intr_efd_disable(dev->intr_handle);
 725                 rte_free(dev->intr_handle->intr_vec);
 726                 dev->intr_handle->intr_vec = NULL;
 727         }
 728
 729         virtio_reset(hw);
 730         virtio_dev_free_mbufs(dev);
 731         virtio_free_queues(hw);
 732
 733         return VIRTIO_OPS(hw)->dev_close(hw);
 734 }
 735
 736 static int
 737 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 738 {
 739         struct virtio_hw *hw = dev->data->dev_private;
 740         struct virtio_pmd_ctrl ctrl;
 741         int dlen[1];
 742         int ret;
 743
 744         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 745                 PMD_INIT_LOG(INFO, "host does not support rx control");
 746                 return -ENOTSUP;
 747         }
 748
 749         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 750         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 751         ctrl.data[0] = 1;
 752         dlen[0] = 1;
 753
 754         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 755         if (ret) {
 756                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 757                 return -EAGAIN;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int
 764 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 765 {
 766         struct virtio_hw *hw = dev->data->dev_private;
 767         struct virtio_pmd_ctrl ctrl;
 768         int dlen[1];
 769         int ret;
 770
 771         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 772                 PMD_INIT_LOG(INFO, "host does not support rx control");
 773                 return -ENOTSUP;
 774         }
 775
 776         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 777         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 778         ctrl.data[0] = 0;
 779         dlen[0] = 1;
 780
 781         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 782         if (ret) {
 783                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 784                 return -EAGAIN;
 785         }
 786
 787         return 0;
 788 }
 789
 790 static int
 791 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 792 {
 793         struct virtio_hw *hw = dev->data->dev_private;
 794         struct virtio_pmd_ctrl ctrl;
 795         int dlen[1];
 796         int ret;
 797
 798         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 799                 PMD_INIT_LOG(INFO, "host does not support rx control");
 800                 return -ENOTSUP;
 801         }
 802
 803         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 804         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 805         ctrl.data[0] = 1;
 806         dlen[0] = 1;
 807
 808         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 809         if (ret) {
 810                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 811                 return -EAGAIN;
 812         }
 813
 814         return 0;
 815 }
 816
 817 static int
 818 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 819 {
 820         struct virtio_hw *hw = dev->data->dev_private;
 821         struct virtio_pmd_ctrl ctrl;
 822         int dlen[1];
 823         int ret;
 824
 825         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 826                 PMD_INIT_LOG(INFO, "host does not support rx control");
 827                 return -ENOTSUP;
 828         }
 829
 830         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 831         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 832         ctrl.data[0] = 0;
 833         dlen[0] = 1;
 834
 835         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 836         if (ret) {
 837                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 838                 return -EAGAIN;
 839         }
 840
 841         return 0;
 842 }
 843
 844 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 845 static int
 846 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 847 {
 848         struct virtio_hw *hw = dev->data->dev_private;
 849         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 850                                  hw->vtnet_hdr_size;
 851         uint32_t frame_size = mtu + ether_hdr_len;
 852         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 853
 854         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 855
 856         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 857                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 858                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 859                 return -EINVAL;
 860         }
 861         return 0;
 862 }
 863
 864 static int
 865 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 866 {
 867         struct virtio_hw *hw = dev->data->dev_private;
 868         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 869         struct virtqueue *vq = virtnet_rxq_to_vq(rxvq);
 870
 871         virtqueue_enable_intr(vq);
 872         virtio_mb(hw->weak_barriers);
 873         return 0;
 874 }
 875
 876 static int
 877 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 878 {
 879         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 880         struct virtqueue *vq = virtnet_rxq_to_vq(rxvq);
 881
 882         virtqueue_disable_intr(vq);
 883         return 0;
 884 }
 885
 886 /*
 887  * dev_ops for virtio, bare necessities for basic operation
 888  */
 889 static const struct eth_dev_ops virtio_eth_dev_ops = {
 890         .dev_configure           = virtio_dev_configure,
 891         .dev_start               = virtio_dev_start,
 892         .dev_stop                = virtio_dev_stop,
 893         .dev_close               = virtio_dev_close,
 894         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 895         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 896         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 897         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 898         .mtu_set                 = virtio_mtu_set,
 899         .dev_infos_get           = virtio_dev_info_get,
 900         .stats_get               = virtio_dev_stats_get,
 901         .xstats_get              = virtio_dev_xstats_get,
 902         .xstats_get_names        = virtio_dev_xstats_get_names,
 903         .stats_reset             = virtio_dev_stats_reset,
 904         .xstats_reset            = virtio_dev_stats_reset,
 905         .link_update             = virtio_dev_link_update,
 906         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 907         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 908         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 909         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 910         .rx_queue_release        = virtio_dev_queue_release,
 911         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 912         .tx_queue_release        = virtio_dev_queue_release,
 913         /* collect stats per queue */
 914         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 915         .vlan_filter_set         = virtio_vlan_filter_set,
 916         .mac_addr_add            = virtio_mac_addr_add,
 917         .mac_addr_remove         = virtio_mac_addr_remove,
 918         .mac_addr_set            = virtio_mac_addr_set,
 919 };
 920
 921 /*
 922  * dev_ops for virtio-user in secondary processes, as we just have
 923  * some limited supports currently.
 924  */
 925 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 926         .dev_infos_get           = virtio_dev_info_get,
 927         .stats_get               = virtio_dev_stats_get,
 928         .xstats_get              = virtio_dev_xstats_get,
 929         .xstats_get_names        = virtio_dev_xstats_get_names,
 930         .stats_reset             = virtio_dev_stats_reset,
 931         .xstats_reset            = virtio_dev_stats_reset,
 932         /* collect stats per queue */
 933         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 934 };
 935
 936 static void
 937 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 938 {
 939         unsigned i;
 940
 941         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 942                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 943                 if (txvq == NULL)
 944                         continue;
 945
 946                 stats->opackets += txvq->stats.packets;
 947                 stats->obytes += txvq->stats.bytes;
 948
 949                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 950                         stats->q_opackets[i] = txvq->stats.packets;
 951                         stats->q_obytes[i] = txvq->stats.bytes;
 952                 }
 953         }
 954
 955         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 956                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 957                 if (rxvq == NULL)
 958                         continue;
 959
 960                 stats->ipackets += rxvq->stats.packets;
 961                 stats->ibytes += rxvq->stats.bytes;
 962                 stats->ierrors += rxvq->stats.errors;
 963
 964                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 965                         stats->q_ipackets[i] = rxvq->stats.packets;
 966                         stats->q_ibytes[i] = rxvq->stats.bytes;
 967                 }
 968         }
 969
 970         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 971 }
 972
 973 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 974                                        struct rte_eth_xstat_name *xstats_names,
 975                                        __rte_unused unsigned limit)
 976 {
 977         unsigned i;
 978         unsigned count = 0;
 979         unsigned t;
 980
 981         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 982                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 983
 984         if (xstats_names != NULL) {
 985                 /* Note: limit checked in rte_eth_xstats_names() */
 986
 987                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 988                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 989                         if (rxvq == NULL)
 990                                 continue;
 991                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 992                                 snprintf(xstats_names[count].name,
 993                                         sizeof(xstats_names[count].name),
 994                                         "rx_q%u_%s", i,
 995                                         rte_virtio_rxq_stat_strings[t].name);
 996                                 count++;
 997                         }
 998                 }
 999
1000                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1001                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1002                         if (txvq == NULL)
1003                                 continue;
1004                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1005                                 snprintf(xstats_names[count].name,
1006                                         sizeof(xstats_names[count].name),
1007                                         "tx_q%u_%s", i,
1008                                         rte_virtio_txq_stat_strings[t].name);
1009                                 count++;
1010                         }
1011                 }
1012                 return count;
1013         }
1014         return nstats;
1015 }
1016
1017 static int
1018 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1019                       unsigned n)
1020 {
1021         unsigned i;
1022         unsigned count = 0;
1023
1024         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1025                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1026
1027         if (n < nstats)
1028                 return nstats;
1029
1030         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1031                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1032
1033                 if (rxvq == NULL)
1034                         continue;
1035
1036                 unsigned t;
1037
1038                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1039                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1040                                 rte_virtio_rxq_stat_strings[t].offset);
1041                         xstats[count].id = count;
1042                         count++;
1043                 }
1044         }
1045
1046         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1047                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1048
1049                 if (txvq == NULL)
1050                         continue;
1051
1052                 unsigned t;
1053
1054                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1055                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1056                                 rte_virtio_txq_stat_strings[t].offset);
1057                         xstats[count].id = count;
1058                         count++;
1059                 }
1060         }
1061
1062         return count;
1063 }
1064
1065 static int
1066 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1067 {
1068         virtio_update_stats(dev, stats);
1069
1070         return 0;
1071 }
1072
1073 static int
1074 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1075 {
1076         unsigned int i;
1077
1078         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1079                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1080                 if (txvq == NULL)
1081                         continue;
1082
1083                 txvq->stats.packets = 0;
1084                 txvq->stats.bytes = 0;
1085                 txvq->stats.multicast = 0;
1086                 txvq->stats.broadcast = 0;
1087                 memset(txvq->stats.size_bins, 0,
1088                        sizeof(txvq->stats.size_bins[0]) * 8);
1089         }
1090
1091         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1092                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1093                 if (rxvq == NULL)
1094                         continue;
1095
1096                 rxvq->stats.packets = 0;
1097                 rxvq->stats.bytes = 0;
1098                 rxvq->stats.errors = 0;
1099                 rxvq->stats.multicast = 0;
1100                 rxvq->stats.broadcast = 0;
1101                 memset(rxvq->stats.size_bins, 0,
1102                        sizeof(rxvq->stats.size_bins[0]) * 8);
1103         }
1104
1105         return 0;
1106 }
1107
1108 static void
1109 virtio_set_hwaddr(struct virtio_hw *hw)
1110 {
1111         virtio_write_dev_config(hw,
1112                         offsetof(struct virtio_net_config, mac),
1113                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1114 }
1115
1116 static void
1117 virtio_get_hwaddr(struct virtio_hw *hw)
1118 {
1119         if (virtio_with_feature(hw, VIRTIO_NET_F_MAC)) {
1120                 virtio_read_dev_config(hw,
1121                         offsetof(struct virtio_net_config, mac),
1122                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1123         } else {
1124                 rte_eth_random_addr(&hw->mac_addr[0]);
1125                 virtio_set_hwaddr(hw);
1126         }
1127 }
1128
1129 static int
1130 virtio_mac_table_set(struct virtio_hw *hw,
1131                      const struct virtio_net_ctrl_mac *uc,
1132                      const struct virtio_net_ctrl_mac *mc)
1133 {
1134         struct virtio_pmd_ctrl ctrl;
1135         int err, len[2];
1136
1137         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1138                 PMD_DRV_LOG(INFO, "host does not support mac table");
1139                 return -1;
1140         }
1141
1142         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1143         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1144
1145         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1146         memcpy(ctrl.data, uc, len[0]);
1147
1148         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1149         memcpy(ctrl.data + len[0], mc, len[1]);
1150
1151         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1152         if (err != 0)
1153                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1154         return err;
1155 }
1156
1157 static int
1158 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1159                     uint32_t index, uint32_t vmdq __rte_unused)
1160 {
1161         struct virtio_hw *hw = dev->data->dev_private;
1162         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1163         unsigned int i;
1164         struct virtio_net_ctrl_mac *uc, *mc;
1165
1166         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1167                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1168                 return -EINVAL;
1169         }
1170
1171         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1172                 sizeof(uc->entries));
1173         uc->entries = 0;
1174         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1175                 sizeof(mc->entries));
1176         mc->entries = 0;
1177
1178         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1179                 const struct rte_ether_addr *addr
1180                         = (i == index) ? mac_addr : addrs + i;
1181                 struct virtio_net_ctrl_mac *tbl
1182                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1183
1184                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1185         }
1186
1187         return virtio_mac_table_set(hw, uc, mc);
1188 }
1189
1190 static void
1191 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1192 {
1193         struct virtio_hw *hw = dev->data->dev_private;
1194         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1195         struct virtio_net_ctrl_mac *uc, *mc;
1196         unsigned int i;
1197
1198         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1199                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1200                 return;
1201         }
1202
1203         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1204                 sizeof(uc->entries));
1205         uc->entries = 0;
1206         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1207                 sizeof(mc->entries));
1208         mc->entries = 0;
1209
1210         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1211                 struct virtio_net_ctrl_mac *tbl;
1212
1213                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1214                         continue;
1215
1216                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1217                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1218                         RTE_ETHER_ADDR_LEN);
1219         }
1220
1221         virtio_mac_table_set(hw, uc, mc);
1222 }
1223
1224 static int
1225 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1226 {
1227         struct virtio_hw *hw = dev->data->dev_private;
1228
1229         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1230
1231         /* Use atomic update if available */
1232         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1233                 struct virtio_pmd_ctrl ctrl;
1234                 int len = RTE_ETHER_ADDR_LEN;
1235
1236                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1237                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1238
1239                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1240                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1241         }
1242
1243         if (!virtio_with_feature(hw, VIRTIO_NET_F_MAC))
1244                 return -ENOTSUP;
1245
1246         virtio_set_hwaddr(hw);
1247         return 0;
1248 }
1249
1250 static int
1251 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1252 {
1253         struct virtio_hw *hw = dev->data->dev_private;
1254         struct virtio_pmd_ctrl ctrl;
1255         int len;
1256
1257         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1258                 return -ENOTSUP;
1259
1260         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1261         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1262         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1263         len = sizeof(vlan_id);
1264
1265         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1266 }
1267
1268 static int
1269 virtio_intr_unmask(struct rte_eth_dev *dev)
1270 {
1271         struct virtio_hw *hw = dev->data->dev_private;
1272
1273         if (rte_intr_ack(dev->intr_handle) < 0)
1274                 return -1;
1275
1276         if (VIRTIO_OPS(hw)->intr_detect)
1277                 VIRTIO_OPS(hw)->intr_detect(hw);
1278
1279         return 0;
1280 }
1281
1282 static int
1283 virtio_intr_enable(struct rte_eth_dev *dev)
1284 {
1285         struct virtio_hw *hw = dev->data->dev_private;
1286
1287         if (rte_intr_enable(dev->intr_handle) < 0)
1288                 return -1;
1289
1290         if (VIRTIO_OPS(hw)->intr_detect)
1291                 VIRTIO_OPS(hw)->intr_detect(hw);
1292
1293         return 0;
1294 }
1295
1296 static int
1297 virtio_intr_disable(struct rte_eth_dev *dev)
1298 {
1299         struct virtio_hw *hw = dev->data->dev_private;
1300
1301         if (rte_intr_disable(dev->intr_handle) < 0)
1302                 return -1;
1303
1304         if (VIRTIO_OPS(hw)->intr_detect)
1305                 VIRTIO_OPS(hw)->intr_detect(hw);
1306
1307         return 0;
1308 }
1309
1310 static int
1311 virtio_ethdev_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1312 {
1313         uint64_t host_features;
1314
1315         /* Prepare guest_features: feature that driver wants to support */
1316         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1317                 req_features);
1318
1319         /* Read device(host) feature bits */
1320         host_features = VIRTIO_OPS(hw)->get_features(hw);
1321         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1322                 host_features);
1323
1324         /* If supported, ensure MTU value is valid before acknowledging it. */
1325         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1326                 struct virtio_net_config config;
1327
1328                 virtio_read_dev_config(hw,
1329                         offsetof(struct virtio_net_config, mtu),
1330                         &config.mtu, sizeof(config.mtu));
1331
1332                 if (config.mtu < RTE_ETHER_MIN_MTU)
1333                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1334         }
1335
1336         /*
1337          * Negotiate features: Subset of device feature bits are written back
1338          * guest feature bits.
1339          */
1340         hw->guest_features = req_features;
1341         hw->guest_features = virtio_negotiate_features(hw, host_features);
1342         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1343                 hw->guest_features);
1344
1345         if (VIRTIO_OPS(hw)->features_ok(hw) < 0)
1346                 return -1;
1347
1348         if (virtio_with_feature(hw, VIRTIO_F_VERSION_1)) {
1349                 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1350
1351                 if (!(virtio_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1352                         PMD_INIT_LOG(ERR, "Failed to set FEATURES_OK status!");
1353                         return -1;
1354                 }
1355         }
1356
1357         hw->req_guest_features = req_features;
1358
1359         return 0;
1360 }
1361
1362 int
1363 virtio_dev_pause(struct rte_eth_dev *dev)
1364 {
1365         struct virtio_hw *hw = dev->data->dev_private;
1366
1367         rte_spinlock_lock(&hw->state_lock);
1368
1369         if (hw->started == 0) {
1370                 /* Device is just stopped. */
1371                 rte_spinlock_unlock(&hw->state_lock);
1372                 return -1;
1373         }
1374         hw->started = 0;
1375         /*
1376          * Prevent the worker threads from touching queues to avoid contention,
1377          * 1 ms should be enough for the ongoing Tx function to finish.
1378          */
1379         rte_delay_ms(1);
1380         return 0;
1381 }
1382
1383 /*
1384  * Recover hw state to let the worker threads continue.
1385  */
1386 void
1387 virtio_dev_resume(struct rte_eth_dev *dev)
1388 {
1389         struct virtio_hw *hw = dev->data->dev_private;
1390
1391         hw->started = 1;
1392         rte_spinlock_unlock(&hw->state_lock);
1393 }
1394
1395 /*
1396  * Should be called only after device is paused.
1397  */
1398 int
1399 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1400                 int nb_pkts)
1401 {
1402         struct virtio_hw *hw = dev->data->dev_private;
1403         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1404         int ret;
1405
1406         hw->inject_pkts = tx_pkts;
1407         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1408         hw->inject_pkts = NULL;
1409
1410         return ret;
1411 }
1412
1413 static void
1414 virtio_notify_peers(struct rte_eth_dev *dev)
1415 {
1416         struct virtio_hw *hw = dev->data->dev_private;
1417         struct virtnet_rx *rxvq;
1418         struct rte_mbuf *rarp_mbuf;
1419
1420         if (!dev->data->rx_queues)
1421                 return;
1422
1423         rxvq = dev->data->rx_queues[0];
1424         if (!rxvq)
1425                 return;
1426
1427         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1428                         (struct rte_ether_addr *)hw->mac_addr);
1429         if (rarp_mbuf == NULL) {
1430                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1431                 return;
1432         }
1433
1434         /* If virtio port just stopped, no need to send RARP */
1435         if (virtio_dev_pause(dev) < 0) {
1436                 rte_pktmbuf_free(rarp_mbuf);
1437                 return;
1438         }
1439
1440         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1441         virtio_dev_resume(dev);
1442 }
1443
1444 static void
1445 virtio_ack_link_announce(struct rte_eth_dev *dev)
1446 {
1447         struct virtio_hw *hw = dev->data->dev_private;
1448         struct virtio_pmd_ctrl ctrl;
1449
1450         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1451         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1452
1453         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1454 }
1455
1456 /*
1457  * Process virtio config changed interrupt. Call the callback
1458  * if link state changed, generate gratuitous RARP packet if
1459  * the status indicates an ANNOUNCE.
1460  */
1461 void
1462 virtio_interrupt_handler(void *param)
1463 {
1464         struct rte_eth_dev *dev = param;
1465         struct virtio_hw *hw = dev->data->dev_private;
1466         uint8_t isr;
1467         uint16_t status;
1468
1469         /* Read interrupt status which clears interrupt */
1470         isr = virtio_get_isr(hw);
1471         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1472
1473         if (virtio_intr_unmask(dev) < 0)
1474                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1475
1476         if (isr & VIRTIO_ISR_CONFIG) {
1477                 if (virtio_dev_link_update(dev, 0) == 0)
1478                         rte_eth_dev_callback_process(dev,
1479                                                      RTE_ETH_EVENT_INTR_LSC,
1480                                                      NULL);
1481
1482                 if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1483                         virtio_read_dev_config(hw,
1484                                 offsetof(struct virtio_net_config, status),
1485                                 &status, sizeof(status));
1486                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1487                                 virtio_notify_peers(dev);
1488                                 if (hw->cvq)
1489                                         virtio_ack_link_announce(dev);
1490                         }
1491                 }
1492         }
1493 }
1494
1495 /* set rx and tx handlers according to what is supported */
1496 static void
1497 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1498 {
1499         struct virtio_hw *hw = eth_dev->data->dev_private;
1500
1501         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1502         if (virtio_with_packed_queue(hw)) {
1503                 PMD_INIT_LOG(INFO,
1504                         "virtio: using packed ring %s Tx path on port %u",
1505                         hw->use_vec_tx ? "vectorized" : "standard",
1506                         eth_dev->data->port_id);
1507                 if (hw->use_vec_tx)
1508                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed_vec;
1509                 else
1510                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1511         } else {
1512                 if (hw->use_inorder_tx) {
1513                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1514                                 eth_dev->data->port_id);
1515                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1516                 } else {
1517                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1518                                 eth_dev->data->port_id);
1519                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1520                 }
1521         }
1522
1523         if (virtio_with_packed_queue(hw)) {
1524                 if (hw->use_vec_rx) {
1525                         PMD_INIT_LOG(INFO,
1526                                 "virtio: using packed ring vectorized Rx path on port %u",
1527                                 eth_dev->data->port_id);
1528                         eth_dev->rx_pkt_burst =
1529                                 &virtio_recv_pkts_packed_vec;
1530                 } else if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1531                         PMD_INIT_LOG(INFO,
1532                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1533                                 eth_dev->data->port_id);
1534                         eth_dev->rx_pkt_burst =
1535                                 &virtio_recv_mergeable_pkts_packed;
1536                 } else {
1537                         PMD_INIT_LOG(INFO,
1538                                 "virtio: using packed ring standard Rx path on port %u",
1539                                 eth_dev->data->port_id);
1540                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1541                 }
1542         } else {
1543                 if (hw->use_vec_rx) {
1544                         PMD_INIT_LOG(INFO, "virtio: using vectorized Rx path on port %u",
1545                                 eth_dev->data->port_id);
1546                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1547                 } else if (hw->use_inorder_rx) {
1548                         PMD_INIT_LOG(INFO,
1549                                 "virtio: using inorder Rx path on port %u",
1550                                 eth_dev->data->port_id);
1551                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1552                 } else if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1553                         PMD_INIT_LOG(INFO,
1554                                 "virtio: using mergeable buffer Rx path on port %u",
1555                                 eth_dev->data->port_id);
1556                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1557                 } else {
1558                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1559                                 eth_dev->data->port_id);
1560                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1561                 }
1562         }
1563
1564 }
1565
1566 /* Only support 1:1 queue/interrupt mapping so far.
1567  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1568  * interrupt vectors (<N+1).
1569  */
1570 static int
1571 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1572 {
1573         uint32_t i;
1574         struct virtio_hw *hw = dev->data->dev_private;
1575
1576         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1577         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1578                 dev->intr_handle->intr_vec[i] = i + 1;
1579                 if (VIRTIO_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1580                                                  VIRTIO_MSI_NO_VECTOR) {
1581                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1582                         return -EBUSY;
1583                 }
1584         }
1585
1586         return 0;
1587 }
1588
1589 static void
1590 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1591 {
1592         uint32_t i;
1593         struct virtio_hw *hw = dev->data->dev_private;
1594
1595         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1596         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1597                 VIRTIO_OPS(hw)->set_queue_irq(hw,
1598                                              hw->vqs[i * VTNET_CQ],
1599                                              VIRTIO_MSI_NO_VECTOR);
1600 }
1601
1602 static int
1603 virtio_configure_intr(struct rte_eth_dev *dev)
1604 {
1605         struct virtio_hw *hw = dev->data->dev_private;
1606
1607         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1608                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1609                 return -ENOTSUP;
1610         }
1611
1612         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1613                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1614                 return -1;
1615         }
1616
1617         if (!dev->intr_handle->intr_vec) {
1618                 dev->intr_handle->intr_vec =
1619                         rte_zmalloc("intr_vec",
1620                                     hw->max_queue_pairs * sizeof(int), 0);
1621                 if (!dev->intr_handle->intr_vec) {
1622                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1623                                      hw->max_queue_pairs);
1624                         return -ENOMEM;
1625                 }
1626         }
1627
1628         /* Re-register callback to update max_intr */
1629         rte_intr_callback_unregister(dev->intr_handle,
1630                                      virtio_interrupt_handler,
1631                                      dev);
1632         rte_intr_callback_register(dev->intr_handle,
1633                                    virtio_interrupt_handler,
1634                                    dev);
1635
1636         /* DO NOT try to remove this! This function will enable msix, or QEMU
1637          * will encounter SIGSEGV when DRIVER_OK is sent.
1638          * And for legacy devices, this should be done before queue/vec binding
1639          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1640          * (22) will be ignored.
1641          */
1642         if (virtio_intr_enable(dev) < 0) {
1643                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1644                 return -1;
1645         }
1646
1647         if (virtio_queues_bind_intr(dev) < 0) {
1648                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1649                 return -1;
1650         }
1651
1652         return 0;
1653 }
1654 #define DUPLEX_UNKNOWN   0xff
1655 /* reset device and renegotiate features if needed */
1656 static int
1657 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1658 {
1659         struct virtio_hw *hw = eth_dev->data->dev_private;
1660         struct virtio_net_config *config;
1661         struct virtio_net_config local_config;
1662         int ret;
1663
1664         /* Reset the device although not necessary at startup */
1665         virtio_reset(hw);
1666
1667         if (hw->vqs) {
1668                 virtio_dev_free_mbufs(eth_dev);
1669                 virtio_free_queues(hw);
1670         }
1671
1672         /* Tell the host we've noticed this device. */
1673         virtio_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1674
1675         /* Tell the host we've known how to drive the device. */
1676         virtio_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1677         if (virtio_ethdev_negotiate_features(hw, req_features) < 0)
1678                 return -1;
1679
1680         hw->weak_barriers = !virtio_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1681
1682         /* If host does not support both status and MSI-X then disable LSC */
1683         if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->intr_lsc)
1684                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1685         else
1686                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1687
1688         eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1689
1690         /* Setting up rx_header size for the device */
1691         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1692             virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
1693             virtio_with_packed_queue(hw))
1694                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1695         else
1696                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1697
1698         /* Copy the permanent MAC address to: virtio_hw */
1699         virtio_get_hwaddr(hw);
1700         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1701                         &eth_dev->data->mac_addrs[0]);
1702         PMD_INIT_LOG(DEBUG,
1703                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1704                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1705                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1706
1707         if (hw->speed == ETH_SPEED_NUM_UNKNOWN) {
1708                 if (virtio_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) {
1709                         config = &local_config;
1710                         virtio_read_dev_config(hw,
1711                                 offsetof(struct virtio_net_config, speed),
1712                                 &config->speed, sizeof(config->speed));
1713                         virtio_read_dev_config(hw,
1714                                 offsetof(struct virtio_net_config, duplex),
1715                                 &config->duplex, sizeof(config->duplex));
1716                         hw->speed = config->speed;
1717                         hw->duplex = config->duplex;
1718                 }
1719         }
1720         if (hw->duplex == DUPLEX_UNKNOWN)
1721                 hw->duplex = ETH_LINK_FULL_DUPLEX;
1722         PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d",
1723                 hw->speed, hw->duplex);
1724         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1725                 config = &local_config;
1726
1727                 virtio_read_dev_config(hw,
1728                         offsetof(struct virtio_net_config, mac),
1729                         &config->mac, sizeof(config->mac));
1730
1731                 if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1732                         virtio_read_dev_config(hw,
1733                                 offsetof(struct virtio_net_config, status),
1734                                 &config->status, sizeof(config->status));
1735                 } else {
1736                         PMD_INIT_LOG(DEBUG,
1737                                      "VIRTIO_NET_F_STATUS is not supported");
1738                         config->status = 0;
1739                 }
1740
1741                 if (virtio_with_feature(hw, VIRTIO_NET_F_MQ)) {
1742                         virtio_read_dev_config(hw,
1743                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1744                                 &config->max_virtqueue_pairs,
1745                                 sizeof(config->max_virtqueue_pairs));
1746                 } else {
1747                         PMD_INIT_LOG(DEBUG,
1748                                      "VIRTIO_NET_F_MQ is not supported");
1749                         config->max_virtqueue_pairs = 1;
1750                 }
1751
1752                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1753
1754                 if (virtio_with_feature(hw, VIRTIO_NET_F_MTU)) {
1755                         virtio_read_dev_config(hw,
1756                                 offsetof(struct virtio_net_config, mtu),
1757                                 &config->mtu,
1758                                 sizeof(config->mtu));
1759
1760                         /*
1761                          * MTU value has already been checked at negotiation
1762                          * time, but check again in case it has changed since
1763                          * then, which should not happen.
1764                          */
1765                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1766                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1767                                                 config->mtu);
1768                                 return -1;
1769                         }
1770
1771                         hw->max_mtu = config->mtu;
1772                         /* Set initial MTU to maximum one supported by vhost */
1773                         eth_dev->data->mtu = config->mtu;
1774
1775                 } else {
1776                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1777                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1778                 }
1779
1780                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1781                                 config->max_virtqueue_pairs);
1782                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1783                 PMD_INIT_LOG(DEBUG,
1784                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1785                                 config->mac[0], config->mac[1],
1786                                 config->mac[2], config->mac[3],
1787                                 config->mac[4], config->mac[5]);
1788         } else {
1789                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1790                 hw->max_queue_pairs = 1;
1791                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1792                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1793         }
1794
1795         ret = virtio_alloc_queues(eth_dev);
1796         if (ret < 0)
1797                 return ret;
1798
1799         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1800                 if (virtio_configure_intr(eth_dev) < 0) {
1801                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1802                         virtio_free_queues(hw);
1803                         return -1;
1804                 }
1805         }
1806
1807         virtio_reinit_complete(hw);
1808
1809         return 0;
1810 }
1811
1812 /*
1813  * This function is based on probe() function in virtio_pci.c
1814  * It returns 0 on success.
1815  */
1816 int
1817 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1818 {
1819         struct virtio_hw *hw = eth_dev->data->dev_private;
1820         uint32_t speed = ETH_SPEED_NUM_UNKNOWN;
1821         int vectorized = 0;
1822         int ret;
1823
1824         if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1825                 PMD_INIT_LOG(ERR,
1826                         "Not sufficient headroom required = %d, avail = %d",
1827                         (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1828                         RTE_PKTMBUF_HEADROOM);
1829
1830                 return -1;
1831         }
1832
1833         eth_dev->dev_ops = &virtio_eth_dev_ops;
1834         eth_dev->rx_descriptor_done = virtio_dev_rx_queue_done;
1835
1836         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1837                 set_rxtx_funcs(eth_dev);
1838                 return 0;
1839         }
1840
1841         ret = virtio_dev_devargs_parse(eth_dev->device->devargs, &speed, &vectorized);
1842         if (ret < 0)
1843                 return ret;
1844         hw->speed = speed;
1845
1846         /* Allocate memory for storing MAC addresses */
1847         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1848                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1849         if (eth_dev->data->mac_addrs == NULL) {
1850                 PMD_INIT_LOG(ERR,
1851                         "Failed to allocate %d bytes needed to store MAC addresses",
1852                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1853                 return -ENOMEM;
1854         }
1855
1856         rte_spinlock_init(&hw->state_lock);
1857
1858         /* reset device and negotiate default features */
1859         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1860         if (ret < 0)
1861                 goto err_virtio_init;
1862
1863         if (vectorized) {
1864                 if (!virtio_with_packed_queue(hw)) {
1865                         hw->use_vec_rx = 1;
1866                 } else {
1867 #if defined(CC_AVX512_SUPPORT) || defined(RTE_ARCH_ARM)
1868                         hw->use_vec_rx = 1;
1869                         hw->use_vec_tx = 1;
1870 #else
1871                         PMD_DRV_LOG(INFO,
1872                                 "building environment do not support packed ring vectorized");
1873 #endif
1874                 }
1875         }
1876
1877         hw->opened = 1;
1878
1879         return 0;
1880
1881 err_virtio_init:
1882         rte_free(eth_dev->data->mac_addrs);
1883         eth_dev->data->mac_addrs = NULL;
1884         return ret;
1885 }
1886
1887 static uint32_t
1888 virtio_dev_speed_capa_get(uint32_t speed)
1889 {
1890         switch (speed) {
1891         case ETH_SPEED_NUM_10G:
1892                 return ETH_LINK_SPEED_10G;
1893         case ETH_SPEED_NUM_20G:
1894                 return ETH_LINK_SPEED_20G;
1895         case ETH_SPEED_NUM_25G:
1896                 return ETH_LINK_SPEED_25G;
1897         case ETH_SPEED_NUM_40G:
1898                 return ETH_LINK_SPEED_40G;
1899         case ETH_SPEED_NUM_50G:
1900                 return ETH_LINK_SPEED_50G;
1901         case ETH_SPEED_NUM_56G:
1902                 return ETH_LINK_SPEED_56G;
1903         case ETH_SPEED_NUM_100G:
1904                 return ETH_LINK_SPEED_100G;
1905         case ETH_SPEED_NUM_200G:
1906                 return ETH_LINK_SPEED_200G;
1907         default:
1908                 return 0;
1909         }
1910 }
1911
1912 static int vectorized_check_handler(__rte_unused const char *key,
1913                 const char *value, void *ret_val)
1914 {
1915         if (strcmp(value, "1") == 0)
1916                 *(int *)ret_val = 1;
1917         else
1918                 *(int *)ret_val = 0;
1919
1920         return 0;
1921 }
1922
1923 #define VIRTIO_ARG_SPEED      "speed"
1924 #define VIRTIO_ARG_VECTORIZED "vectorized"
1925
1926 static int
1927 link_speed_handler(const char *key __rte_unused,
1928                 const char *value, void *ret_val)
1929 {
1930         uint32_t val;
1931         if (!value || !ret_val)
1932                 return -EINVAL;
1933         val = strtoul(value, NULL, 0);
1934         /* validate input */
1935         if (virtio_dev_speed_capa_get(val) == 0)
1936                 return -EINVAL;
1937         *(uint32_t *)ret_val = val;
1938
1939         return 0;
1940 }
1941
1942
1943 static int
1944 virtio_dev_devargs_parse(struct rte_devargs *devargs, uint32_t *speed, int *vectorized)
1945 {
1946         struct rte_kvargs *kvlist;
1947         int ret = 0;
1948
1949         if (devargs == NULL)
1950                 return 0;
1951
1952         kvlist = rte_kvargs_parse(devargs->args, NULL);
1953         if (kvlist == NULL) {
1954                 PMD_INIT_LOG(ERR, "error when parsing param");
1955                 return 0;
1956         }
1957
1958         if (speed && rte_kvargs_count(kvlist, VIRTIO_ARG_SPEED) == 1) {
1959                 ret = rte_kvargs_process(kvlist,
1960                                         VIRTIO_ARG_SPEED,
1961                                         link_speed_handler, speed);
1962                 if (ret < 0) {
1963                         PMD_INIT_LOG(ERR, "Failed to parse %s",
1964                                         VIRTIO_ARG_SPEED);
1965                         goto exit;
1966                 }
1967         }
1968
1969         if (vectorized &&
1970                 rte_kvargs_count(kvlist, VIRTIO_ARG_VECTORIZED) == 1) {
1971                 ret = rte_kvargs_process(kvlist,
1972                                 VIRTIO_ARG_VECTORIZED,
1973                                 vectorized_check_handler, vectorized);
1974                 if (ret < 0) {
1975                         PMD_INIT_LOG(ERR, "Failed to parse %s",
1976                                         VIRTIO_ARG_VECTORIZED);
1977                         goto exit;
1978                 }
1979         }
1980
1981 exit:
1982         rte_kvargs_free(kvlist);
1983         return ret;
1984 }
1985
1986 static uint8_t
1987 rx_offload_enabled(struct virtio_hw *hw)
1988 {
1989         return virtio_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
1990                 virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1991                 virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
1992 }
1993
1994 static uint8_t
1995 tx_offload_enabled(struct virtio_hw *hw)
1996 {
1997         return virtio_with_feature(hw, VIRTIO_NET_F_CSUM) ||
1998                 virtio_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
1999                 virtio_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2000 }
2001
2002 /*
2003  * Configure virtio device
2004  * It returns 0 on success.
2005  */
2006 static int
2007 virtio_dev_configure(struct rte_eth_dev *dev)
2008 {
2009         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2010         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2011         struct virtio_hw *hw = dev->data->dev_private;
2012         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2013                 hw->vtnet_hdr_size;
2014         uint64_t rx_offloads = rxmode->offloads;
2015         uint64_t tx_offloads = txmode->offloads;
2016         uint64_t req_features;
2017         int ret;
2018
2019         PMD_INIT_LOG(DEBUG, "configure");
2020         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2021
2022         if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2023                 PMD_DRV_LOG(ERR,
2024                         "Unsupported Rx multi queue mode %d",
2025                         rxmode->mq_mode);
2026                 return -EINVAL;
2027         }
2028
2029         if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2030                 PMD_DRV_LOG(ERR,
2031                         "Unsupported Tx multi queue mode %d",
2032                         txmode->mq_mode);
2033                 return -EINVAL;
2034         }
2035
2036         if (dev->data->dev_conf.intr_conf.rxq) {
2037                 ret = virtio_init_device(dev, hw->req_guest_features);
2038                 if (ret < 0)
2039                         return ret;
2040         }
2041
2042         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2043                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2044
2045         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2046                            DEV_RX_OFFLOAD_TCP_CKSUM))
2047                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2048
2049         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2050                 req_features |=
2051                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2052                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2053
2054         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2055                            DEV_TX_OFFLOAD_TCP_CKSUM))
2056                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2057
2058         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2059                 req_features |=
2060                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2061                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2062
2063         /* if request features changed, reinit the device */
2064         if (req_features != hw->req_guest_features) {
2065                 ret = virtio_init_device(dev, req_features);
2066                 if (ret < 0)
2067                         return ret;
2068         }
2069
2070         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2071                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2072                 !virtio_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2073                 PMD_DRV_LOG(ERR,
2074                         "rx checksum not available on this host");
2075                 return -ENOTSUP;
2076         }
2077
2078         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2079                 (!virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2080                  !virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2081                 PMD_DRV_LOG(ERR,
2082                         "Large Receive Offload not available on this host");
2083                 return -ENOTSUP;
2084         }
2085
2086         /* start control queue */
2087         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2088                 virtio_dev_cq_start(dev);
2089
2090         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2091                 hw->vlan_strip = 1;
2092
2093         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2094                         !virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2095                 PMD_DRV_LOG(ERR,
2096                             "vlan filtering not available on this host");
2097                 return -ENOTSUP;
2098         }
2099
2100         hw->has_tx_offload = tx_offload_enabled(hw);
2101         hw->has_rx_offload = rx_offload_enabled(hw);
2102
2103         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2104                 /* Enable vector (0) for Link State Intrerrupt */
2105                 if (VIRTIO_OPS(hw)->set_config_irq(hw, 0) ==
2106                                 VIRTIO_MSI_NO_VECTOR) {
2107                         PMD_DRV_LOG(ERR, "failed to set config vector");
2108                         return -EBUSY;
2109                 }
2110
2111         if (virtio_with_packed_queue(hw)) {
2112 #if defined(RTE_ARCH_X86_64) && defined(CC_AVX512_SUPPORT)
2113                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2114                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
2115                      !virtio_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2116                      !virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
2117                      rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_512)) {
2118                         PMD_DRV_LOG(INFO,
2119                                 "disabled packed ring vectorized path for requirements not met");
2120                         hw->use_vec_rx = 0;
2121                         hw->use_vec_tx = 0;
2122                 }
2123 #elif defined(RTE_ARCH_ARM)
2124                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2125                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON) ||
2126                      !virtio_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2127                      !virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
2128                      rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_128)) {
2129                         PMD_DRV_LOG(INFO,
2130                                 "disabled packed ring vectorized path for requirements not met");
2131                         hw->use_vec_rx = 0;
2132                         hw->use_vec_tx = 0;
2133                 }
2134 #else
2135                 hw->use_vec_rx = 0;
2136                 hw->use_vec_tx = 0;
2137 #endif
2138
2139                 if (hw->use_vec_rx) {
2140                         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2141                                 PMD_DRV_LOG(INFO,
2142                                         "disabled packed ring vectorized rx for mrg_rxbuf enabled");
2143                                 hw->use_vec_rx = 0;
2144                         }
2145
2146                         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) {
2147                                 PMD_DRV_LOG(INFO,
2148                                         "disabled packed ring vectorized rx for TCP_LRO enabled");
2149                                 hw->use_vec_rx = 0;
2150                         }
2151                 }
2152         } else {
2153                 if (virtio_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2154                         hw->use_inorder_tx = 1;
2155                         hw->use_inorder_rx = 1;
2156                         hw->use_vec_rx = 0;
2157                 }
2158
2159                 if (hw->use_vec_rx) {
2160 #if defined RTE_ARCH_ARM
2161                         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2162                                 PMD_DRV_LOG(INFO,
2163                                         "disabled split ring vectorized path for requirement not met");
2164                                 hw->use_vec_rx = 0;
2165                         }
2166 #endif
2167                         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2168                                 PMD_DRV_LOG(INFO,
2169                                         "disabled split ring vectorized rx for mrg_rxbuf enabled");
2170                                 hw->use_vec_rx = 0;
2171                         }
2172
2173                         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2174                                            DEV_RX_OFFLOAD_TCP_CKSUM |
2175                                            DEV_RX_OFFLOAD_TCP_LRO |
2176                                            DEV_RX_OFFLOAD_VLAN_STRIP)) {
2177                                 PMD_DRV_LOG(INFO,
2178                                         "disabled split ring vectorized rx for offloading enabled");
2179                                 hw->use_vec_rx = 0;
2180                         }
2181
2182                         if (rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_128) {
2183                                 PMD_DRV_LOG(INFO,
2184                                         "disabled split ring vectorized rx, max SIMD bitwidth too low");
2185                                 hw->use_vec_rx = 0;
2186                         }
2187                 }
2188         }
2189
2190         return 0;
2191 }
2192
2193
2194 static int
2195 virtio_dev_start(struct rte_eth_dev *dev)
2196 {
2197         uint16_t nb_queues, i;
2198         struct virtqueue *vq;
2199         struct virtio_hw *hw = dev->data->dev_private;
2200         int ret;
2201
2202         /* Finish the initialization of the queues */
2203         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2204                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2205                 if (ret < 0)
2206                         return ret;
2207         }
2208         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2209                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2210                 if (ret < 0)
2211                         return ret;
2212         }
2213
2214         /* check if lsc interrupt feature is enabled */
2215         if (dev->data->dev_conf.intr_conf.lsc) {
2216                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2217                         PMD_DRV_LOG(ERR, "link status not supported by host");
2218                         return -ENOTSUP;
2219                 }
2220         }
2221
2222         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2223          * in device configure, but it could be unmapped  when device is
2224          * stopped.
2225          */
2226         if (dev->data->dev_conf.intr_conf.lsc ||
2227             dev->data->dev_conf.intr_conf.rxq) {
2228                 virtio_intr_disable(dev);
2229
2230                 /* Setup interrupt callback  */
2231                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2232                         rte_intr_callback_register(dev->intr_handle,
2233                                                    virtio_interrupt_handler,
2234                                                    dev);
2235
2236                 if (virtio_intr_enable(dev) < 0) {
2237                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2238                         return -EIO;
2239                 }
2240         }
2241
2242         /*Notify the backend
2243          *Otherwise the tap backend might already stop its queue due to fullness.
2244          *vhost backend will have no chance to be waked up
2245          */
2246         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2247         if (hw->max_queue_pairs > 1) {
2248                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2249                         return -EINVAL;
2250         }
2251
2252         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2253
2254         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2255                 vq = virtnet_rxq_to_vq(dev->data->rx_queues[i]);
2256                 /* Flush the old packets */
2257                 virtqueue_rxvq_flush(vq);
2258                 virtqueue_notify(vq);
2259         }
2260
2261         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2262                 vq = virtnet_txq_to_vq(dev->data->tx_queues[i]);
2263                 virtqueue_notify(vq);
2264         }
2265
2266         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2267
2268         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2269                 vq = virtnet_rxq_to_vq(dev->data->rx_queues[i]);
2270                 VIRTQUEUE_DUMP(vq);
2271         }
2272
2273         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2274                 vq = virtnet_txq_to_vq(dev->data->tx_queues[i]);
2275                 VIRTQUEUE_DUMP(vq);
2276         }
2277
2278         set_rxtx_funcs(dev);
2279         hw->started = 1;
2280
2281         /* Initialize Link state */
2282         virtio_dev_link_update(dev, 0);
2283
2284         return 0;
2285 }
2286
2287 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2288 {
2289         struct virtio_hw *hw = dev->data->dev_private;
2290         uint16_t nr_vq = virtio_get_nr_vq(hw);
2291         const char *type __rte_unused;
2292         unsigned int i, mbuf_num = 0;
2293         struct virtqueue *vq;
2294         struct rte_mbuf *buf;
2295         int queue_type;
2296
2297         if (hw->vqs == NULL)
2298                 return;
2299
2300         for (i = 0; i < nr_vq; i++) {
2301                 vq = hw->vqs[i];
2302                 if (!vq)
2303                         continue;
2304
2305                 queue_type = virtio_get_queue_type(hw, i);
2306                 if (queue_type == VTNET_RQ)
2307                         type = "rxq";
2308                 else if (queue_type == VTNET_TQ)
2309                         type = "txq";
2310                 else
2311                         continue;
2312
2313                 PMD_INIT_LOG(DEBUG,
2314                         "Before freeing %s[%d] used and unused buf",
2315                         type, i);
2316                 VIRTQUEUE_DUMP(vq);
2317
2318                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2319                         rte_pktmbuf_free(buf);
2320                         mbuf_num++;
2321                 }
2322
2323                 PMD_INIT_LOG(DEBUG,
2324                         "After freeing %s[%d] used and unused buf",
2325                         type, i);
2326                 VIRTQUEUE_DUMP(vq);
2327         }
2328
2329         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2330 }
2331
2332 /*
2333  * Stop device: disable interrupt and mark link down
2334  */
2335 int
2336 virtio_dev_stop(struct rte_eth_dev *dev)
2337 {
2338         struct virtio_hw *hw = dev->data->dev_private;
2339         struct rte_eth_link link;
2340         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2341
2342         PMD_INIT_LOG(DEBUG, "stop");
2343         dev->data->dev_started = 0;
2344
2345         rte_spinlock_lock(&hw->state_lock);
2346         if (!hw->started)
2347                 goto out_unlock;
2348         hw->started = 0;
2349
2350         if (intr_conf->lsc || intr_conf->rxq) {
2351                 virtio_intr_disable(dev);
2352
2353                 /* Reset interrupt callback  */
2354                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2355                         rte_intr_callback_unregister(dev->intr_handle,
2356                                                      virtio_interrupt_handler,
2357                                                      dev);
2358                 }
2359         }
2360
2361         memset(&link, 0, sizeof(link));
2362         rte_eth_linkstatus_set(dev, &link);
2363 out_unlock:
2364         rte_spinlock_unlock(&hw->state_lock);
2365
2366         return 0;
2367 }
2368
2369 static int
2370 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2371 {
2372         struct rte_eth_link link;
2373         uint16_t status;
2374         struct virtio_hw *hw = dev->data->dev_private;
2375
2376         memset(&link, 0, sizeof(link));
2377         link.link_duplex = hw->duplex;
2378         link.link_speed  = hw->speed;
2379         link.link_autoneg = ETH_LINK_AUTONEG;
2380
2381         if (!hw->started) {
2382                 link.link_status = ETH_LINK_DOWN;
2383                 link.link_speed = ETH_SPEED_NUM_NONE;
2384         } else if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2385                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2386                 virtio_read_dev_config(hw,
2387                                 offsetof(struct virtio_net_config, status),
2388                                 &status, sizeof(status));
2389                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2390                         link.link_status = ETH_LINK_DOWN;
2391                         link.link_speed = ETH_SPEED_NUM_NONE;
2392                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2393                                      dev->data->port_id);
2394                 } else {
2395                         link.link_status = ETH_LINK_UP;
2396                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2397                                      dev->data->port_id);
2398                 }
2399         } else {
2400                 link.link_status = ETH_LINK_UP;
2401         }
2402
2403         return rte_eth_linkstatus_set(dev, &link);
2404 }
2405
2406 static int
2407 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2408 {
2409         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2410         struct virtio_hw *hw = dev->data->dev_private;
2411         uint64_t offloads = rxmode->offloads;
2412
2413         if (mask & ETH_VLAN_FILTER_MASK) {
2414                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2415                                 !virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2416
2417                         PMD_DRV_LOG(NOTICE,
2418                                 "vlan filtering not available on this host");
2419
2420                         return -ENOTSUP;
2421                 }
2422         }
2423
2424         if (mask & ETH_VLAN_STRIP_MASK)
2425                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2426
2427         return 0;
2428 }
2429
2430 static int
2431 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2432 {
2433         uint64_t tso_mask, host_features;
2434         struct virtio_hw *hw = dev->data->dev_private;
2435         dev_info->speed_capa = virtio_dev_speed_capa_get(hw->speed);
2436
2437         dev_info->max_rx_queues =
2438                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2439         dev_info->max_tx_queues =
2440                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2441         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2442         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2443         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2444
2445         host_features = VIRTIO_OPS(hw)->get_features(hw);
2446         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2447         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2448         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2449                 dev_info->rx_offload_capa |=
2450                         DEV_RX_OFFLOAD_TCP_CKSUM |
2451                         DEV_RX_OFFLOAD_UDP_CKSUM;
2452         }
2453         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2454                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2455         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2456                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2457         if ((host_features & tso_mask) == tso_mask)
2458                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2459
2460         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2461                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2462         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2463                 dev_info->tx_offload_capa |=
2464                         DEV_TX_OFFLOAD_UDP_CKSUM |
2465                         DEV_TX_OFFLOAD_TCP_CKSUM;
2466         }
2467         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2468                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2469         if ((host_features & tso_mask) == tso_mask)
2470                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2471
2472         return 0;
2473 }
2474
2475 /*
2476  * It enables testpmd to collect per queue stats.
2477  */
2478 static int
2479 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2480 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2481 __rte_unused uint8_t is_rx)
2482 {
2483         return 0;
2484 }
2485
2486 RTE_LOG_REGISTER(virtio_logtype_init, pmd.net.virtio.init, NOTICE);
2487 RTE_LOG_REGISTER(virtio_logtype_driver, pmd.net.virtio.driver, NOTICE);