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 uint16_t
 845 virtio_rx_mem_pool_buf_size(struct rte_mempool *mp)
 846 {
 847         return rte_pktmbuf_data_room_size(mp) - RTE_PKTMBUF_HEADROOM;
 848 }
 849
 850 bool
 851 virtio_rx_check_scatter(uint16_t max_rx_pkt_len, uint16_t rx_buf_size,
 852                         bool rx_scatter_enabled, const char **error)
 853 {
 854         if (!rx_scatter_enabled && max_rx_pkt_len > rx_buf_size) {
 855                 *error = "Rx scatter is disabled and RxQ mbuf pool object size is too small";
 856                 return false;
 857         }
 858
 859         return true;
 860 }
 861
 862 static bool
 863 virtio_check_scatter_on_all_rx_queues(struct rte_eth_dev *dev,
 864                                       uint16_t frame_size)
 865 {
 866         struct virtio_hw *hw = dev->data->dev_private;
 867         struct virtnet_rx *rxvq;
 868         struct virtqueue *vq;
 869         unsigned int qidx;
 870         uint16_t buf_size;
 871         const char *error;
 872
 873         if (hw->vqs == NULL)
 874                 return true;
 875
 876         for (qidx = 0; (vq = hw->vqs[2 * qidx + VTNET_SQ_RQ_QUEUE_IDX]) != NULL;
 877              qidx++) {
 878                 rxvq = &vq->rxq;
 879                 if (rxvq->mpool == NULL)
 880                         continue;
 881                 buf_size = virtio_rx_mem_pool_buf_size(rxvq->mpool);
 882
 883                 if (!virtio_rx_check_scatter(frame_size, buf_size,
 884                                              hw->rx_ol_scatter, &error)) {
 885                         PMD_INIT_LOG(ERR, "MTU check for RxQ %u failed: %s",
 886                                      qidx, error);
 887                         return false;
 888                 }
 889         }
 890
 891         return true;
 892 }
 893
 894 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 895 static int
 896 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 897 {
 898         struct virtio_hw *hw = dev->data->dev_private;
 899         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 900                                  hw->vtnet_hdr_size;
 901         uint32_t frame_size = mtu + ether_hdr_len;
 902         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 903
 904         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 905
 906         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 907                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 908                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 909                 return -EINVAL;
 910         }
 911
 912         if (!virtio_check_scatter_on_all_rx_queues(dev, frame_size)) {
 913                 PMD_INIT_LOG(ERR, "MTU vs Rx scatter and Rx buffers check failed");
 914                 return -EINVAL;
 915         }
 916
 917         hw->max_rx_pkt_len = frame_size;
 918         dev->data->dev_conf.rxmode.max_rx_pkt_len = hw->max_rx_pkt_len;
 919
 920         return 0;
 921 }
 922
 923 static int
 924 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 925 {
 926         struct virtio_hw *hw = dev->data->dev_private;
 927         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 928         struct virtqueue *vq = virtnet_rxq_to_vq(rxvq);
 929
 930         virtqueue_enable_intr(vq);
 931         virtio_mb(hw->weak_barriers);
 932         return 0;
 933 }
 934
 935 static int
 936 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 937 {
 938         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 939         struct virtqueue *vq = virtnet_rxq_to_vq(rxvq);
 940
 941         virtqueue_disable_intr(vq);
 942         return 0;
 943 }
 944
 945 /*
 946  * dev_ops for virtio, bare necessities for basic operation
 947  */
 948 static const struct eth_dev_ops virtio_eth_dev_ops = {
 949         .dev_configure           = virtio_dev_configure,
 950         .dev_start               = virtio_dev_start,
 951         .dev_stop                = virtio_dev_stop,
 952         .dev_close               = virtio_dev_close,
 953         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 954         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 955         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 956         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 957         .mtu_set                 = virtio_mtu_set,
 958         .dev_infos_get           = virtio_dev_info_get,
 959         .stats_get               = virtio_dev_stats_get,
 960         .xstats_get              = virtio_dev_xstats_get,
 961         .xstats_get_names        = virtio_dev_xstats_get_names,
 962         .stats_reset             = virtio_dev_stats_reset,
 963         .xstats_reset            = virtio_dev_stats_reset,
 964         .link_update             = virtio_dev_link_update,
 965         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 966         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 967         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 968         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 969         .rx_queue_release        = virtio_dev_queue_release,
 970         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 971         .tx_queue_release        = virtio_dev_queue_release,
 972         /* collect stats per queue */
 973         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 974         .vlan_filter_set         = virtio_vlan_filter_set,
 975         .mac_addr_add            = virtio_mac_addr_add,
 976         .mac_addr_remove         = virtio_mac_addr_remove,
 977         .mac_addr_set            = virtio_mac_addr_set,
 978 };
 979
 980 /*
 981  * dev_ops for virtio-user in secondary processes, as we just have
 982  * some limited supports currently.
 983  */
 984 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 985         .dev_infos_get           = virtio_dev_info_get,
 986         .stats_get               = virtio_dev_stats_get,
 987         .xstats_get              = virtio_dev_xstats_get,
 988         .xstats_get_names        = virtio_dev_xstats_get_names,
 989         .stats_reset             = virtio_dev_stats_reset,
 990         .xstats_reset            = virtio_dev_stats_reset,
 991         /* collect stats per queue */
 992         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 993 };
 994
 995 static void
 996 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 997 {
 998         unsigned i;
 999
1000         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1001                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
1002                 if (txvq == NULL)
1003                         continue;
1004
1005                 stats->opackets += txvq->stats.packets;
1006                 stats->obytes += txvq->stats.bytes;
1007
1008                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
1009                         stats->q_opackets[i] = txvq->stats.packets;
1010                         stats->q_obytes[i] = txvq->stats.bytes;
1011                 }
1012         }
1013
1014         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1015                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1016                 if (rxvq == NULL)
1017                         continue;
1018
1019                 stats->ipackets += rxvq->stats.packets;
1020                 stats->ibytes += rxvq->stats.bytes;
1021                 stats->ierrors += rxvq->stats.errors;
1022
1023                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
1024                         stats->q_ipackets[i] = rxvq->stats.packets;
1025                         stats->q_ibytes[i] = rxvq->stats.bytes;
1026                 }
1027         }
1028
1029         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
1030 }
1031
1032 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
1033                                        struct rte_eth_xstat_name *xstats_names,
1034                                        __rte_unused unsigned limit)
1035 {
1036         unsigned i;
1037         unsigned count = 0;
1038         unsigned t;
1039
1040         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1041                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1042
1043         if (xstats_names != NULL) {
1044                 /* Note: limit checked in rte_eth_xstats_names() */
1045
1046                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1047                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1048                         if (rxvq == NULL)
1049                                 continue;
1050                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1051                                 snprintf(xstats_names[count].name,
1052                                         sizeof(xstats_names[count].name),
1053                                         "rx_q%u_%s", i,
1054                                         rte_virtio_rxq_stat_strings[t].name);
1055                                 count++;
1056                         }
1057                 }
1058
1059                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1060                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1061                         if (txvq == NULL)
1062                                 continue;
1063                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1064                                 snprintf(xstats_names[count].name,
1065                                         sizeof(xstats_names[count].name),
1066                                         "tx_q%u_%s", i,
1067                                         rte_virtio_txq_stat_strings[t].name);
1068                                 count++;
1069                         }
1070                 }
1071                 return count;
1072         }
1073         return nstats;
1074 }
1075
1076 static int
1077 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1078                       unsigned n)
1079 {
1080         unsigned i;
1081         unsigned count = 0;
1082
1083         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1084                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1085
1086         if (n < nstats)
1087                 return nstats;
1088
1089         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1090                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1091
1092                 if (rxvq == NULL)
1093                         continue;
1094
1095                 unsigned t;
1096
1097                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1098                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1099                                 rte_virtio_rxq_stat_strings[t].offset);
1100                         xstats[count].id = count;
1101                         count++;
1102                 }
1103         }
1104
1105         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1106                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1107
1108                 if (txvq == NULL)
1109                         continue;
1110
1111                 unsigned t;
1112
1113                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1114                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1115                                 rte_virtio_txq_stat_strings[t].offset);
1116                         xstats[count].id = count;
1117                         count++;
1118                 }
1119         }
1120
1121         return count;
1122 }
1123
1124 static int
1125 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1126 {
1127         virtio_update_stats(dev, stats);
1128
1129         return 0;
1130 }
1131
1132 static int
1133 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1134 {
1135         unsigned int i;
1136
1137         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1138                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1139                 if (txvq == NULL)
1140                         continue;
1141
1142                 txvq->stats.packets = 0;
1143                 txvq->stats.bytes = 0;
1144                 txvq->stats.multicast = 0;
1145                 txvq->stats.broadcast = 0;
1146                 memset(txvq->stats.size_bins, 0,
1147                        sizeof(txvq->stats.size_bins[0]) * 8);
1148         }
1149
1150         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1151                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1152                 if (rxvq == NULL)
1153                         continue;
1154
1155                 rxvq->stats.packets = 0;
1156                 rxvq->stats.bytes = 0;
1157                 rxvq->stats.errors = 0;
1158                 rxvq->stats.multicast = 0;
1159                 rxvq->stats.broadcast = 0;
1160                 memset(rxvq->stats.size_bins, 0,
1161                        sizeof(rxvq->stats.size_bins[0]) * 8);
1162         }
1163
1164         return 0;
1165 }
1166
1167 static void
1168 virtio_set_hwaddr(struct virtio_hw *hw)
1169 {
1170         virtio_write_dev_config(hw,
1171                         offsetof(struct virtio_net_config, mac),
1172                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1173 }
1174
1175 static void
1176 virtio_get_hwaddr(struct virtio_hw *hw)
1177 {
1178         if (virtio_with_feature(hw, VIRTIO_NET_F_MAC)) {
1179                 virtio_read_dev_config(hw,
1180                         offsetof(struct virtio_net_config, mac),
1181                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1182         } else {
1183                 rte_eth_random_addr(&hw->mac_addr[0]);
1184                 virtio_set_hwaddr(hw);
1185         }
1186 }
1187
1188 static int
1189 virtio_mac_table_set(struct virtio_hw *hw,
1190                      const struct virtio_net_ctrl_mac *uc,
1191                      const struct virtio_net_ctrl_mac *mc)
1192 {
1193         struct virtio_pmd_ctrl ctrl;
1194         int err, len[2];
1195
1196         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1197                 PMD_DRV_LOG(INFO, "host does not support mac table");
1198                 return -1;
1199         }
1200
1201         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1202         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1203
1204         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1205         memcpy(ctrl.data, uc, len[0]);
1206
1207         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1208         memcpy(ctrl.data + len[0], mc, len[1]);
1209
1210         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1211         if (err != 0)
1212                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1213         return err;
1214 }
1215
1216 static int
1217 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1218                     uint32_t index, uint32_t vmdq __rte_unused)
1219 {
1220         struct virtio_hw *hw = dev->data->dev_private;
1221         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1222         unsigned int i;
1223         struct virtio_net_ctrl_mac *uc, *mc;
1224
1225         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1226                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1227                 return -EINVAL;
1228         }
1229
1230         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1231                 sizeof(uc->entries));
1232         uc->entries = 0;
1233         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1234                 sizeof(mc->entries));
1235         mc->entries = 0;
1236
1237         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1238                 const struct rte_ether_addr *addr
1239                         = (i == index) ? mac_addr : addrs + i;
1240                 struct virtio_net_ctrl_mac *tbl
1241                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1242
1243                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1244         }
1245
1246         return virtio_mac_table_set(hw, uc, mc);
1247 }
1248
1249 static void
1250 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1251 {
1252         struct virtio_hw *hw = dev->data->dev_private;
1253         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1254         struct virtio_net_ctrl_mac *uc, *mc;
1255         unsigned int i;
1256
1257         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1258                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1259                 return;
1260         }
1261
1262         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1263                 sizeof(uc->entries));
1264         uc->entries = 0;
1265         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1266                 sizeof(mc->entries));
1267         mc->entries = 0;
1268
1269         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1270                 struct virtio_net_ctrl_mac *tbl;
1271
1272                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1273                         continue;
1274
1275                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1276                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1277                         RTE_ETHER_ADDR_LEN);
1278         }
1279
1280         virtio_mac_table_set(hw, uc, mc);
1281 }
1282
1283 static int
1284 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1285 {
1286         struct virtio_hw *hw = dev->data->dev_private;
1287
1288         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1289
1290         /* Use atomic update if available */
1291         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1292                 struct virtio_pmd_ctrl ctrl;
1293                 int len = RTE_ETHER_ADDR_LEN;
1294
1295                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1296                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1297
1298                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1299                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1300         }
1301
1302         if (!virtio_with_feature(hw, VIRTIO_NET_F_MAC))
1303                 return -ENOTSUP;
1304
1305         virtio_set_hwaddr(hw);
1306         return 0;
1307 }
1308
1309 static int
1310 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1311 {
1312         struct virtio_hw *hw = dev->data->dev_private;
1313         struct virtio_pmd_ctrl ctrl;
1314         int len;
1315
1316         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1317                 return -ENOTSUP;
1318
1319         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1320         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1321         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1322         len = sizeof(vlan_id);
1323
1324         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1325 }
1326
1327 static int
1328 virtio_intr_unmask(struct rte_eth_dev *dev)
1329 {
1330         struct virtio_hw *hw = dev->data->dev_private;
1331
1332         if (rte_intr_ack(dev->intr_handle) < 0)
1333                 return -1;
1334
1335         if (VIRTIO_OPS(hw)->intr_detect)
1336                 VIRTIO_OPS(hw)->intr_detect(hw);
1337
1338         return 0;
1339 }
1340
1341 static int
1342 virtio_intr_enable(struct rte_eth_dev *dev)
1343 {
1344         struct virtio_hw *hw = dev->data->dev_private;
1345
1346         if (rte_intr_enable(dev->intr_handle) < 0)
1347                 return -1;
1348
1349         if (VIRTIO_OPS(hw)->intr_detect)
1350                 VIRTIO_OPS(hw)->intr_detect(hw);
1351
1352         return 0;
1353 }
1354
1355 static int
1356 virtio_intr_disable(struct rte_eth_dev *dev)
1357 {
1358         struct virtio_hw *hw = dev->data->dev_private;
1359
1360         if (rte_intr_disable(dev->intr_handle) < 0)
1361                 return -1;
1362
1363         if (VIRTIO_OPS(hw)->intr_detect)
1364                 VIRTIO_OPS(hw)->intr_detect(hw);
1365
1366         return 0;
1367 }
1368
1369 static int
1370 virtio_ethdev_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1371 {
1372         uint64_t host_features;
1373
1374         /* Prepare guest_features: feature that driver wants to support */
1375         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1376                 req_features);
1377
1378         /* Read device(host) feature bits */
1379         host_features = VIRTIO_OPS(hw)->get_features(hw);
1380         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1381                 host_features);
1382
1383         /* If supported, ensure MTU value is valid before acknowledging it. */
1384         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1385                 struct virtio_net_config config;
1386
1387                 virtio_read_dev_config(hw,
1388                         offsetof(struct virtio_net_config, mtu),
1389                         &config.mtu, sizeof(config.mtu));
1390
1391                 if (config.mtu < RTE_ETHER_MIN_MTU)
1392                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1393         }
1394
1395         /*
1396          * Negotiate features: Subset of device feature bits are written back
1397          * guest feature bits.
1398          */
1399         hw->guest_features = req_features;
1400         hw->guest_features = virtio_negotiate_features(hw, host_features);
1401         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1402                 hw->guest_features);
1403
1404         if (VIRTIO_OPS(hw)->features_ok(hw) < 0)
1405                 return -1;
1406
1407         if (virtio_with_feature(hw, VIRTIO_F_VERSION_1)) {
1408                 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1409
1410                 if (!(virtio_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1411                         PMD_INIT_LOG(ERR, "Failed to set FEATURES_OK status!");
1412                         return -1;
1413                 }
1414         }
1415
1416         hw->req_guest_features = req_features;
1417
1418         return 0;
1419 }
1420
1421 int
1422 virtio_dev_pause(struct rte_eth_dev *dev)
1423 {
1424         struct virtio_hw *hw = dev->data->dev_private;
1425
1426         rte_spinlock_lock(&hw->state_lock);
1427
1428         if (hw->started == 0) {
1429                 /* Device is just stopped. */
1430                 rte_spinlock_unlock(&hw->state_lock);
1431                 return -1;
1432         }
1433         hw->started = 0;
1434         /*
1435          * Prevent the worker threads from touching queues to avoid contention,
1436          * 1 ms should be enough for the ongoing Tx function to finish.
1437          */
1438         rte_delay_ms(1);
1439         return 0;
1440 }
1441
1442 /*
1443  * Recover hw state to let the worker threads continue.
1444  */
1445 void
1446 virtio_dev_resume(struct rte_eth_dev *dev)
1447 {
1448         struct virtio_hw *hw = dev->data->dev_private;
1449
1450         hw->started = 1;
1451         rte_spinlock_unlock(&hw->state_lock);
1452 }
1453
1454 /*
1455  * Should be called only after device is paused.
1456  */
1457 int
1458 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1459                 int nb_pkts)
1460 {
1461         struct virtio_hw *hw = dev->data->dev_private;
1462         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1463         int ret;
1464
1465         hw->inject_pkts = tx_pkts;
1466         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1467         hw->inject_pkts = NULL;
1468
1469         return ret;
1470 }
1471
1472 static void
1473 virtio_notify_peers(struct rte_eth_dev *dev)
1474 {
1475         struct virtio_hw *hw = dev->data->dev_private;
1476         struct virtnet_rx *rxvq;
1477         struct rte_mbuf *rarp_mbuf;
1478
1479         if (!dev->data->rx_queues)
1480                 return;
1481
1482         rxvq = dev->data->rx_queues[0];
1483         if (!rxvq)
1484                 return;
1485
1486         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1487                         (struct rte_ether_addr *)hw->mac_addr);
1488         if (rarp_mbuf == NULL) {
1489                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1490                 return;
1491         }
1492
1493         /* If virtio port just stopped, no need to send RARP */
1494         if (virtio_dev_pause(dev) < 0) {
1495                 rte_pktmbuf_free(rarp_mbuf);
1496                 return;
1497         }
1498
1499         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1500         virtio_dev_resume(dev);
1501 }
1502
1503 static void
1504 virtio_ack_link_announce(struct rte_eth_dev *dev)
1505 {
1506         struct virtio_hw *hw = dev->data->dev_private;
1507         struct virtio_pmd_ctrl ctrl;
1508
1509         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1510         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1511
1512         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1513 }
1514
1515 /*
1516  * Process virtio config changed interrupt. Call the callback
1517  * if link state changed, generate gratuitous RARP packet if
1518  * the status indicates an ANNOUNCE.
1519  */
1520 void
1521 virtio_interrupt_handler(void *param)
1522 {
1523         struct rte_eth_dev *dev = param;
1524         struct virtio_hw *hw = dev->data->dev_private;
1525         uint8_t isr;
1526         uint16_t status;
1527
1528         /* Read interrupt status which clears interrupt */
1529         isr = virtio_get_isr(hw);
1530         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1531
1532         if (virtio_intr_unmask(dev) < 0)
1533                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1534
1535         if (isr & VIRTIO_ISR_CONFIG) {
1536                 if (virtio_dev_link_update(dev, 0) == 0)
1537                         rte_eth_dev_callback_process(dev,
1538                                                      RTE_ETH_EVENT_INTR_LSC,
1539                                                      NULL);
1540
1541                 if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1542                         virtio_read_dev_config(hw,
1543                                 offsetof(struct virtio_net_config, status),
1544                                 &status, sizeof(status));
1545                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1546                                 virtio_notify_peers(dev);
1547                                 if (hw->cvq)
1548                                         virtio_ack_link_announce(dev);
1549                         }
1550                 }
1551         }
1552 }
1553
1554 /* set rx and tx handlers according to what is supported */
1555 static void
1556 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1557 {
1558         struct virtio_hw *hw = eth_dev->data->dev_private;
1559
1560         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1561         if (virtio_with_packed_queue(hw)) {
1562                 PMD_INIT_LOG(INFO,
1563                         "virtio: using packed ring %s Tx path on port %u",
1564                         hw->use_vec_tx ? "vectorized" : "standard",
1565                         eth_dev->data->port_id);
1566                 if (hw->use_vec_tx)
1567                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed_vec;
1568                 else
1569                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1570         } else {
1571                 if (hw->use_inorder_tx) {
1572                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1573                                 eth_dev->data->port_id);
1574                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1575                 } else {
1576                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1577                                 eth_dev->data->port_id);
1578                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1579                 }
1580         }
1581
1582         if (virtio_with_packed_queue(hw)) {
1583                 if (hw->use_vec_rx) {
1584                         PMD_INIT_LOG(INFO,
1585                                 "virtio: using packed ring vectorized Rx path on port %u",
1586                                 eth_dev->data->port_id);
1587                         eth_dev->rx_pkt_burst =
1588                                 &virtio_recv_pkts_packed_vec;
1589                 } else if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1590                         PMD_INIT_LOG(INFO,
1591                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1592                                 eth_dev->data->port_id);
1593                         eth_dev->rx_pkt_burst =
1594                                 &virtio_recv_mergeable_pkts_packed;
1595                 } else {
1596                         PMD_INIT_LOG(INFO,
1597                                 "virtio: using packed ring standard Rx path on port %u",
1598                                 eth_dev->data->port_id);
1599                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1600                 }
1601         } else {
1602                 if (hw->use_vec_rx) {
1603                         PMD_INIT_LOG(INFO, "virtio: using vectorized Rx path on port %u",
1604                                 eth_dev->data->port_id);
1605                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1606                 } else if (hw->use_inorder_rx) {
1607                         PMD_INIT_LOG(INFO,
1608                                 "virtio: using inorder Rx path on port %u",
1609                                 eth_dev->data->port_id);
1610                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1611                 } else if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1612                         PMD_INIT_LOG(INFO,
1613                                 "virtio: using mergeable buffer Rx path on port %u",
1614                                 eth_dev->data->port_id);
1615                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1616                 } else {
1617                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1618                                 eth_dev->data->port_id);
1619                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1620                 }
1621         }
1622
1623 }
1624
1625 /* Only support 1:1 queue/interrupt mapping so far.
1626  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1627  * interrupt vectors (<N+1).
1628  */
1629 static int
1630 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1631 {
1632         uint32_t i;
1633         struct virtio_hw *hw = dev->data->dev_private;
1634
1635         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1636         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1637                 dev->intr_handle->intr_vec[i] = i + 1;
1638                 if (VIRTIO_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1639                                                  VIRTIO_MSI_NO_VECTOR) {
1640                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1641                         return -EBUSY;
1642                 }
1643         }
1644
1645         return 0;
1646 }
1647
1648 static void
1649 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1650 {
1651         uint32_t i;
1652         struct virtio_hw *hw = dev->data->dev_private;
1653
1654         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1655         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1656                 VIRTIO_OPS(hw)->set_queue_irq(hw,
1657                                              hw->vqs[i * VTNET_CQ],
1658                                              VIRTIO_MSI_NO_VECTOR);
1659 }
1660
1661 static int
1662 virtio_configure_intr(struct rte_eth_dev *dev)
1663 {
1664         struct virtio_hw *hw = dev->data->dev_private;
1665
1666         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1667                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1668                 return -ENOTSUP;
1669         }
1670
1671         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1672                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1673                 return -1;
1674         }
1675
1676         if (!dev->intr_handle->intr_vec) {
1677                 dev->intr_handle->intr_vec =
1678                         rte_zmalloc("intr_vec",
1679                                     hw->max_queue_pairs * sizeof(int), 0);
1680                 if (!dev->intr_handle->intr_vec) {
1681                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1682                                      hw->max_queue_pairs);
1683                         return -ENOMEM;
1684                 }
1685         }
1686
1687         /* Re-register callback to update max_intr */
1688         rte_intr_callback_unregister(dev->intr_handle,
1689                                      virtio_interrupt_handler,
1690                                      dev);
1691         rte_intr_callback_register(dev->intr_handle,
1692                                    virtio_interrupt_handler,
1693                                    dev);
1694
1695         /* DO NOT try to remove this! This function will enable msix, or QEMU
1696          * will encounter SIGSEGV when DRIVER_OK is sent.
1697          * And for legacy devices, this should be done before queue/vec binding
1698          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1699          * (22) will be ignored.
1700          */
1701         if (virtio_intr_enable(dev) < 0) {
1702                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1703                 return -1;
1704         }
1705
1706         if (virtio_queues_bind_intr(dev) < 0) {
1707                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1708                 return -1;
1709         }
1710
1711         return 0;
1712 }
1713 #define DUPLEX_UNKNOWN   0xff
1714 /* reset device and renegotiate features if needed */
1715 static int
1716 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1717 {
1718         struct virtio_hw *hw = eth_dev->data->dev_private;
1719         struct virtio_net_config *config;
1720         struct virtio_net_config local_config;
1721         int ret;
1722
1723         /* Reset the device although not necessary at startup */
1724         virtio_reset(hw);
1725
1726         if (hw->vqs) {
1727                 virtio_dev_free_mbufs(eth_dev);
1728                 virtio_free_queues(hw);
1729         }
1730
1731         /* Tell the host we've noticed this device. */
1732         virtio_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1733
1734         /* Tell the host we've known how to drive the device. */
1735         virtio_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1736         if (virtio_ethdev_negotiate_features(hw, req_features) < 0)
1737                 return -1;
1738
1739         hw->weak_barriers = !virtio_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1740
1741         /* If host does not support both status and MSI-X then disable LSC */
1742         if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->intr_lsc)
1743                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1744         else
1745                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1746
1747         eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1748
1749         /* Setting up rx_header size for the device */
1750         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1751             virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
1752             virtio_with_packed_queue(hw))
1753                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1754         else
1755                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1756
1757         /* Copy the permanent MAC address to: virtio_hw */
1758         virtio_get_hwaddr(hw);
1759         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1760                         &eth_dev->data->mac_addrs[0]);
1761         PMD_INIT_LOG(DEBUG,
1762                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1763                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1764                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1765
1766         if (hw->speed == ETH_SPEED_NUM_UNKNOWN) {
1767                 if (virtio_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) {
1768                         config = &local_config;
1769                         virtio_read_dev_config(hw,
1770                                 offsetof(struct virtio_net_config, speed),
1771                                 &config->speed, sizeof(config->speed));
1772                         virtio_read_dev_config(hw,
1773                                 offsetof(struct virtio_net_config, duplex),
1774                                 &config->duplex, sizeof(config->duplex));
1775                         hw->speed = config->speed;
1776                         hw->duplex = config->duplex;
1777                 }
1778         }
1779         if (hw->duplex == DUPLEX_UNKNOWN)
1780                 hw->duplex = ETH_LINK_FULL_DUPLEX;
1781         PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d",
1782                 hw->speed, hw->duplex);
1783         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1784                 config = &local_config;
1785
1786                 virtio_read_dev_config(hw,
1787                         offsetof(struct virtio_net_config, mac),
1788                         &config->mac, sizeof(config->mac));
1789
1790                 if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1791                         virtio_read_dev_config(hw,
1792                                 offsetof(struct virtio_net_config, status),
1793                                 &config->status, sizeof(config->status));
1794                 } else {
1795                         PMD_INIT_LOG(DEBUG,
1796                                      "VIRTIO_NET_F_STATUS is not supported");
1797                         config->status = 0;
1798                 }
1799
1800                 if (virtio_with_feature(hw, VIRTIO_NET_F_MQ)) {
1801                         virtio_read_dev_config(hw,
1802                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1803                                 &config->max_virtqueue_pairs,
1804                                 sizeof(config->max_virtqueue_pairs));
1805                 } else {
1806                         PMD_INIT_LOG(DEBUG,
1807                                      "VIRTIO_NET_F_MQ is not supported");
1808                         config->max_virtqueue_pairs = 1;
1809                 }
1810
1811                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1812
1813                 if (virtio_with_feature(hw, VIRTIO_NET_F_MTU)) {
1814                         virtio_read_dev_config(hw,
1815                                 offsetof(struct virtio_net_config, mtu),
1816                                 &config->mtu,
1817                                 sizeof(config->mtu));
1818
1819                         /*
1820                          * MTU value has already been checked at negotiation
1821                          * time, but check again in case it has changed since
1822                          * then, which should not happen.
1823                          */
1824                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1825                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1826                                                 config->mtu);
1827                                 return -1;
1828                         }
1829
1830                         hw->max_mtu = config->mtu;
1831                         /* Set initial MTU to maximum one supported by vhost */
1832                         eth_dev->data->mtu = config->mtu;
1833
1834                 } else {
1835                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1836                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1837                 }
1838
1839                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1840                                 config->max_virtqueue_pairs);
1841                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1842                 PMD_INIT_LOG(DEBUG,
1843                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1844                                 config->mac[0], config->mac[1],
1845                                 config->mac[2], config->mac[3],
1846                                 config->mac[4], config->mac[5]);
1847         } else {
1848                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1849                 hw->max_queue_pairs = 1;
1850                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1851                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1852         }
1853
1854         ret = virtio_alloc_queues(eth_dev);
1855         if (ret < 0)
1856                 return ret;
1857
1858         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1859                 if (virtio_configure_intr(eth_dev) < 0) {
1860                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1861                         virtio_free_queues(hw);
1862                         return -1;
1863                 }
1864         }
1865
1866         virtio_reinit_complete(hw);
1867
1868         return 0;
1869 }
1870
1871 /*
1872  * This function is based on probe() function in virtio_pci.c
1873  * It returns 0 on success.
1874  */
1875 int
1876 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1877 {
1878         struct virtio_hw *hw = eth_dev->data->dev_private;
1879         uint32_t speed = ETH_SPEED_NUM_UNKNOWN;
1880         int vectorized = 0;
1881         int ret;
1882
1883         if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1884                 PMD_INIT_LOG(ERR,
1885                         "Not sufficient headroom required = %d, avail = %d",
1886                         (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1887                         RTE_PKTMBUF_HEADROOM);
1888
1889                 return -1;
1890         }
1891
1892         eth_dev->dev_ops = &virtio_eth_dev_ops;
1893         eth_dev->rx_descriptor_done = virtio_dev_rx_queue_done;
1894
1895         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1896                 set_rxtx_funcs(eth_dev);
1897                 return 0;
1898         }
1899
1900         ret = virtio_dev_devargs_parse(eth_dev->device->devargs, &speed, &vectorized);
1901         if (ret < 0)
1902                 return ret;
1903         hw->speed = speed;
1904
1905         /* Allocate memory for storing MAC addresses */
1906         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1907                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1908         if (eth_dev->data->mac_addrs == NULL) {
1909                 PMD_INIT_LOG(ERR,
1910                         "Failed to allocate %d bytes needed to store MAC addresses",
1911                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1912                 return -ENOMEM;
1913         }
1914
1915         rte_spinlock_init(&hw->state_lock);
1916
1917         /* reset device and negotiate default features */
1918         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1919         if (ret < 0)
1920                 goto err_virtio_init;
1921
1922         if (vectorized) {
1923                 if (!virtio_with_packed_queue(hw)) {
1924                         hw->use_vec_rx = 1;
1925                 } else {
1926 #if defined(CC_AVX512_SUPPORT) || defined(RTE_ARCH_ARM)
1927                         hw->use_vec_rx = 1;
1928                         hw->use_vec_tx = 1;
1929 #else
1930                         PMD_DRV_LOG(INFO,
1931                                 "building environment do not support packed ring vectorized");
1932 #endif
1933                 }
1934         }
1935
1936         hw->opened = 1;
1937
1938         return 0;
1939
1940 err_virtio_init:
1941         rte_free(eth_dev->data->mac_addrs);
1942         eth_dev->data->mac_addrs = NULL;
1943         return ret;
1944 }
1945
1946 static uint32_t
1947 virtio_dev_speed_capa_get(uint32_t speed)
1948 {
1949         switch (speed) {
1950         case ETH_SPEED_NUM_10G:
1951                 return ETH_LINK_SPEED_10G;
1952         case ETH_SPEED_NUM_20G:
1953                 return ETH_LINK_SPEED_20G;
1954         case ETH_SPEED_NUM_25G:
1955                 return ETH_LINK_SPEED_25G;
1956         case ETH_SPEED_NUM_40G:
1957                 return ETH_LINK_SPEED_40G;
1958         case ETH_SPEED_NUM_50G:
1959                 return ETH_LINK_SPEED_50G;
1960         case ETH_SPEED_NUM_56G:
1961                 return ETH_LINK_SPEED_56G;
1962         case ETH_SPEED_NUM_100G:
1963                 return ETH_LINK_SPEED_100G;
1964         case ETH_SPEED_NUM_200G:
1965                 return ETH_LINK_SPEED_200G;
1966         default:
1967                 return 0;
1968         }
1969 }
1970
1971 static int vectorized_check_handler(__rte_unused const char *key,
1972                 const char *value, void *ret_val)
1973 {
1974         if (strcmp(value, "1") == 0)
1975                 *(int *)ret_val = 1;
1976         else
1977                 *(int *)ret_val = 0;
1978
1979         return 0;
1980 }
1981
1982 #define VIRTIO_ARG_SPEED      "speed"
1983 #define VIRTIO_ARG_VECTORIZED "vectorized"
1984
1985 static int
1986 link_speed_handler(const char *key __rte_unused,
1987                 const char *value, void *ret_val)
1988 {
1989         uint32_t val;
1990         if (!value || !ret_val)
1991                 return -EINVAL;
1992         val = strtoul(value, NULL, 0);
1993         /* validate input */
1994         if (virtio_dev_speed_capa_get(val) == 0)
1995                 return -EINVAL;
1996         *(uint32_t *)ret_val = val;
1997
1998         return 0;
1999 }
2000
2001
2002 static int
2003 virtio_dev_devargs_parse(struct rte_devargs *devargs, uint32_t *speed, int *vectorized)
2004 {
2005         struct rte_kvargs *kvlist;
2006         int ret = 0;
2007
2008         if (devargs == NULL)
2009                 return 0;
2010
2011         kvlist = rte_kvargs_parse(devargs->args, NULL);
2012         if (kvlist == NULL) {
2013                 PMD_INIT_LOG(ERR, "error when parsing param");
2014                 return 0;
2015         }
2016
2017         if (speed && rte_kvargs_count(kvlist, VIRTIO_ARG_SPEED) == 1) {
2018                 ret = rte_kvargs_process(kvlist,
2019                                         VIRTIO_ARG_SPEED,
2020                                         link_speed_handler, speed);
2021                 if (ret < 0) {
2022                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2023                                         VIRTIO_ARG_SPEED);
2024                         goto exit;
2025                 }
2026         }
2027
2028         if (vectorized &&
2029                 rte_kvargs_count(kvlist, VIRTIO_ARG_VECTORIZED) == 1) {
2030                 ret = rte_kvargs_process(kvlist,
2031                                 VIRTIO_ARG_VECTORIZED,
2032                                 vectorized_check_handler, vectorized);
2033                 if (ret < 0) {
2034                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2035                                         VIRTIO_ARG_VECTORIZED);
2036                         goto exit;
2037                 }
2038         }
2039
2040 exit:
2041         rte_kvargs_free(kvlist);
2042         return ret;
2043 }
2044
2045 static uint8_t
2046 rx_offload_enabled(struct virtio_hw *hw)
2047 {
2048         return virtio_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2049                 virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2050                 virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2051 }
2052
2053 static uint8_t
2054 tx_offload_enabled(struct virtio_hw *hw)
2055 {
2056         return virtio_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2057                 virtio_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2058                 virtio_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2059 }
2060
2061 /*
2062  * Configure virtio device
2063  * It returns 0 on success.
2064  */
2065 static int
2066 virtio_dev_configure(struct rte_eth_dev *dev)
2067 {
2068         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2069         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2070         struct virtio_hw *hw = dev->data->dev_private;
2071         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2072                 hw->vtnet_hdr_size;
2073         uint64_t rx_offloads = rxmode->offloads;
2074         uint64_t tx_offloads = txmode->offloads;
2075         uint64_t req_features;
2076         int ret;
2077
2078         PMD_INIT_LOG(DEBUG, "configure");
2079         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2080
2081         if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2082                 PMD_DRV_LOG(ERR,
2083                         "Unsupported Rx multi queue mode %d",
2084                         rxmode->mq_mode);
2085                 return -EINVAL;
2086         }
2087
2088         if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2089                 PMD_DRV_LOG(ERR,
2090                         "Unsupported Tx multi queue mode %d",
2091                         txmode->mq_mode);
2092                 return -EINVAL;
2093         }
2094
2095         if (dev->data->dev_conf.intr_conf.rxq) {
2096                 ret = virtio_init_device(dev, hw->req_guest_features);
2097                 if (ret < 0)
2098                         return ret;
2099         }
2100
2101         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2102                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2103
2104         hw->max_rx_pkt_len = rxmode->max_rx_pkt_len;
2105
2106         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2107                            DEV_RX_OFFLOAD_TCP_CKSUM))
2108                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2109
2110         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2111                 req_features |=
2112                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2113                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2114
2115         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2116                            DEV_TX_OFFLOAD_TCP_CKSUM))
2117                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2118
2119         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2120                 req_features |=
2121                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2122                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2123
2124         /* if request features changed, reinit the device */
2125         if (req_features != hw->req_guest_features) {
2126                 ret = virtio_init_device(dev, req_features);
2127                 if (ret < 0)
2128                         return ret;
2129         }
2130
2131         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2132                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2133                 !virtio_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2134                 PMD_DRV_LOG(ERR,
2135                         "rx checksum not available on this host");
2136                 return -ENOTSUP;
2137         }
2138
2139         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2140                 (!virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2141                  !virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2142                 PMD_DRV_LOG(ERR,
2143                         "Large Receive Offload not available on this host");
2144                 return -ENOTSUP;
2145         }
2146
2147         /* start control queue */
2148         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2149                 virtio_dev_cq_start(dev);
2150
2151         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2152                 hw->vlan_strip = 1;
2153
2154         hw->rx_ol_scatter = (rx_offloads & DEV_RX_OFFLOAD_SCATTER);
2155
2156         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2157                         !virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2158                 PMD_DRV_LOG(ERR,
2159                             "vlan filtering not available on this host");
2160                 return -ENOTSUP;
2161         }
2162
2163         hw->has_tx_offload = tx_offload_enabled(hw);
2164         hw->has_rx_offload = rx_offload_enabled(hw);
2165
2166         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2167                 /* Enable vector (0) for Link State Intrerrupt */
2168                 if (VIRTIO_OPS(hw)->set_config_irq(hw, 0) ==
2169                                 VIRTIO_MSI_NO_VECTOR) {
2170                         PMD_DRV_LOG(ERR, "failed to set config vector");
2171                         return -EBUSY;
2172                 }
2173
2174         if (virtio_with_packed_queue(hw)) {
2175 #if defined(RTE_ARCH_X86_64) && defined(CC_AVX512_SUPPORT)
2176                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2177                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
2178                      !virtio_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2179                      !virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
2180                      rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_512)) {
2181                         PMD_DRV_LOG(INFO,
2182                                 "disabled packed ring vectorized path for requirements not met");
2183                         hw->use_vec_rx = 0;
2184                         hw->use_vec_tx = 0;
2185                 }
2186 #elif defined(RTE_ARCH_ARM)
2187                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2188                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON) ||
2189                      !virtio_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2190                      !virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
2191                      rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_128)) {
2192                         PMD_DRV_LOG(INFO,
2193                                 "disabled packed ring vectorized path for requirements not met");
2194                         hw->use_vec_rx = 0;
2195                         hw->use_vec_tx = 0;
2196                 }
2197 #else
2198                 hw->use_vec_rx = 0;
2199                 hw->use_vec_tx = 0;
2200 #endif
2201
2202                 if (hw->use_vec_rx) {
2203                         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2204                                 PMD_DRV_LOG(INFO,
2205                                         "disabled packed ring vectorized rx for mrg_rxbuf enabled");
2206                                 hw->use_vec_rx = 0;
2207                         }
2208
2209                         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) {
2210                                 PMD_DRV_LOG(INFO,
2211                                         "disabled packed ring vectorized rx for TCP_LRO enabled");
2212                                 hw->use_vec_rx = 0;
2213                         }
2214                 }
2215         } else {
2216                 if (virtio_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2217                         hw->use_inorder_tx = 1;
2218                         hw->use_inorder_rx = 1;
2219                         hw->use_vec_rx = 0;
2220                 }
2221
2222                 if (hw->use_vec_rx) {
2223 #if defined RTE_ARCH_ARM
2224                         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2225                                 PMD_DRV_LOG(INFO,
2226                                         "disabled split ring vectorized path for requirement not met");
2227                                 hw->use_vec_rx = 0;
2228                         }
2229 #endif
2230                         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2231                                 PMD_DRV_LOG(INFO,
2232                                         "disabled split ring vectorized rx for mrg_rxbuf enabled");
2233                                 hw->use_vec_rx = 0;
2234                         }
2235
2236                         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2237                                            DEV_RX_OFFLOAD_TCP_CKSUM |
2238                                            DEV_RX_OFFLOAD_TCP_LRO |
2239                                            DEV_RX_OFFLOAD_VLAN_STRIP)) {
2240                                 PMD_DRV_LOG(INFO,
2241                                         "disabled split ring vectorized rx for offloading enabled");
2242                                 hw->use_vec_rx = 0;
2243                         }
2244
2245                         if (rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_128) {
2246                                 PMD_DRV_LOG(INFO,
2247                                         "disabled split ring vectorized rx, max SIMD bitwidth too low");
2248                                 hw->use_vec_rx = 0;
2249                         }
2250                 }
2251         }
2252
2253         return 0;
2254 }
2255
2256
2257 static int
2258 virtio_dev_start(struct rte_eth_dev *dev)
2259 {
2260         uint16_t nb_queues, i;
2261         struct virtqueue *vq;
2262         struct virtio_hw *hw = dev->data->dev_private;
2263         int ret;
2264
2265         /* Finish the initialization of the queues */
2266         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2267                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2268                 if (ret < 0)
2269                         return ret;
2270         }
2271         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2272                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2273                 if (ret < 0)
2274                         return ret;
2275         }
2276
2277         /* check if lsc interrupt feature is enabled */
2278         if (dev->data->dev_conf.intr_conf.lsc) {
2279                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2280                         PMD_DRV_LOG(ERR, "link status not supported by host");
2281                         return -ENOTSUP;
2282                 }
2283         }
2284
2285         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2286          * in device configure, but it could be unmapped  when device is
2287          * stopped.
2288          */
2289         if (dev->data->dev_conf.intr_conf.lsc ||
2290             dev->data->dev_conf.intr_conf.rxq) {
2291                 virtio_intr_disable(dev);
2292
2293                 /* Setup interrupt callback  */
2294                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2295                         rte_intr_callback_register(dev->intr_handle,
2296                                                    virtio_interrupt_handler,
2297                                                    dev);
2298
2299                 if (virtio_intr_enable(dev) < 0) {
2300                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2301                         return -EIO;
2302                 }
2303         }
2304
2305         /*Notify the backend
2306          *Otherwise the tap backend might already stop its queue due to fullness.
2307          *vhost backend will have no chance to be waked up
2308          */
2309         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2310         if (hw->max_queue_pairs > 1) {
2311                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2312                         return -EINVAL;
2313         }
2314
2315         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2316
2317         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2318                 vq = virtnet_rxq_to_vq(dev->data->rx_queues[i]);
2319                 /* Flush the old packets */
2320                 virtqueue_rxvq_flush(vq);
2321                 virtqueue_notify(vq);
2322         }
2323
2324         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2325                 vq = virtnet_txq_to_vq(dev->data->tx_queues[i]);
2326                 virtqueue_notify(vq);
2327         }
2328
2329         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2330
2331         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2332                 vq = virtnet_rxq_to_vq(dev->data->rx_queues[i]);
2333                 VIRTQUEUE_DUMP(vq);
2334         }
2335
2336         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2337                 vq = virtnet_txq_to_vq(dev->data->tx_queues[i]);
2338                 VIRTQUEUE_DUMP(vq);
2339         }
2340
2341         set_rxtx_funcs(dev);
2342         hw->started = 1;
2343
2344         /* Initialize Link state */
2345         virtio_dev_link_update(dev, 0);
2346
2347         return 0;
2348 }
2349
2350 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2351 {
2352         struct virtio_hw *hw = dev->data->dev_private;
2353         uint16_t nr_vq = virtio_get_nr_vq(hw);
2354         const char *type __rte_unused;
2355         unsigned int i, mbuf_num = 0;
2356         struct virtqueue *vq;
2357         struct rte_mbuf *buf;
2358         int queue_type;
2359
2360         if (hw->vqs == NULL)
2361                 return;
2362
2363         for (i = 0; i < nr_vq; i++) {
2364                 vq = hw->vqs[i];
2365                 if (!vq)
2366                         continue;
2367
2368                 queue_type = virtio_get_queue_type(hw, i);
2369                 if (queue_type == VTNET_RQ)
2370                         type = "rxq";
2371                 else if (queue_type == VTNET_TQ)
2372                         type = "txq";
2373                 else
2374                         continue;
2375
2376                 PMD_INIT_LOG(DEBUG,
2377                         "Before freeing %s[%d] used and unused buf",
2378                         type, i);
2379                 VIRTQUEUE_DUMP(vq);
2380
2381                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2382                         rte_pktmbuf_free(buf);
2383                         mbuf_num++;
2384                 }
2385
2386                 PMD_INIT_LOG(DEBUG,
2387                         "After freeing %s[%d] used and unused buf",
2388                         type, i);
2389                 VIRTQUEUE_DUMP(vq);
2390         }
2391
2392         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2393 }
2394
2395 /*
2396  * Stop device: disable interrupt and mark link down
2397  */
2398 int
2399 virtio_dev_stop(struct rte_eth_dev *dev)
2400 {
2401         struct virtio_hw *hw = dev->data->dev_private;
2402         struct rte_eth_link link;
2403         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2404
2405         PMD_INIT_LOG(DEBUG, "stop");
2406         dev->data->dev_started = 0;
2407
2408         rte_spinlock_lock(&hw->state_lock);
2409         if (!hw->started)
2410                 goto out_unlock;
2411         hw->started = 0;
2412
2413         if (intr_conf->lsc || intr_conf->rxq) {
2414                 virtio_intr_disable(dev);
2415
2416                 /* Reset interrupt callback  */
2417                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2418                         rte_intr_callback_unregister(dev->intr_handle,
2419                                                      virtio_interrupt_handler,
2420                                                      dev);
2421                 }
2422         }
2423
2424         memset(&link, 0, sizeof(link));
2425         rte_eth_linkstatus_set(dev, &link);
2426 out_unlock:
2427         rte_spinlock_unlock(&hw->state_lock);
2428
2429         return 0;
2430 }
2431
2432 static int
2433 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2434 {
2435         struct rte_eth_link link;
2436         uint16_t status;
2437         struct virtio_hw *hw = dev->data->dev_private;
2438
2439         memset(&link, 0, sizeof(link));
2440         link.link_duplex = hw->duplex;
2441         link.link_speed  = hw->speed;
2442         link.link_autoneg = ETH_LINK_AUTONEG;
2443
2444         if (!hw->started) {
2445                 link.link_status = ETH_LINK_DOWN;
2446                 link.link_speed = ETH_SPEED_NUM_NONE;
2447         } else if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2448                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2449                 virtio_read_dev_config(hw,
2450                                 offsetof(struct virtio_net_config, status),
2451                                 &status, sizeof(status));
2452                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2453                         link.link_status = ETH_LINK_DOWN;
2454                         link.link_speed = ETH_SPEED_NUM_NONE;
2455                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2456                                      dev->data->port_id);
2457                 } else {
2458                         link.link_status = ETH_LINK_UP;
2459                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2460                                      dev->data->port_id);
2461                 }
2462         } else {
2463                 link.link_status = ETH_LINK_UP;
2464         }
2465
2466         return rte_eth_linkstatus_set(dev, &link);
2467 }
2468
2469 static int
2470 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2471 {
2472         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2473         struct virtio_hw *hw = dev->data->dev_private;
2474         uint64_t offloads = rxmode->offloads;
2475
2476         if (mask & ETH_VLAN_FILTER_MASK) {
2477                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2478                                 !virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2479
2480                         PMD_DRV_LOG(NOTICE,
2481                                 "vlan filtering not available on this host");
2482
2483                         return -ENOTSUP;
2484                 }
2485         }
2486
2487         if (mask & ETH_VLAN_STRIP_MASK)
2488                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2489
2490         return 0;
2491 }
2492
2493 static int
2494 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2495 {
2496         uint64_t tso_mask, host_features;
2497         struct virtio_hw *hw = dev->data->dev_private;
2498         dev_info->speed_capa = virtio_dev_speed_capa_get(hw->speed);
2499
2500         dev_info->max_rx_queues =
2501                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2502         dev_info->max_tx_queues =
2503                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2504         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2505         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2506         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2507         dev_info->max_mtu = hw->max_mtu;
2508
2509         host_features = VIRTIO_OPS(hw)->get_features(hw);
2510         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2511         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2512         if (host_features & (1ULL << VIRTIO_NET_F_MRG_RXBUF))
2513                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_SCATTER;
2514         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2515                 dev_info->rx_offload_capa |=
2516                         DEV_RX_OFFLOAD_TCP_CKSUM |
2517                         DEV_RX_OFFLOAD_UDP_CKSUM;
2518         }
2519         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2520                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2521         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2522                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2523         if ((host_features & tso_mask) == tso_mask)
2524                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2525
2526         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2527                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2528         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2529                 dev_info->tx_offload_capa |=
2530                         DEV_TX_OFFLOAD_UDP_CKSUM |
2531                         DEV_TX_OFFLOAD_TCP_CKSUM;
2532         }
2533         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2534                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2535         if ((host_features & tso_mask) == tso_mask)
2536                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2537
2538         return 0;
2539 }
2540
2541 /*
2542  * It enables testpmd to collect per queue stats.
2543  */
2544 static int
2545 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2546 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2547 __rte_unused uint8_t is_rx)
2548 {
2549         return 0;
2550 }
2551
2552 RTE_LOG_REGISTER_SUFFIX(virtio_logtype_init, init, NOTICE);
2553 RTE_LOG_REGISTER_SUFFIX(virtio_logtype_driver, driver, NOTICE);