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_rxtx_simple.h"
  37 #include "virtio_user/virtio_user_dev.h"
  38
  39 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  40 static int  virtio_dev_start(struct rte_eth_dev *dev);
  41 static int virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  42 static int virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  43 static int virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  44 static int virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  45 static uint32_t virtio_dev_speed_capa_get(uint32_t speed);
  46 static int virtio_dev_devargs_parse(struct rte_devargs *devargs,
  47         uint32_t *speed,
  48         int *vectorized);
  49 static int virtio_dev_info_get(struct rte_eth_dev *dev,
  50                                 struct rte_eth_dev_info *dev_info);
  51 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  52         int wait_to_complete);
  53 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  54
  55 static void virtio_set_hwaddr(struct virtio_hw *hw);
  56 static void virtio_get_hwaddr(struct virtio_hw *hw);
  57
  58 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  59                                  struct rte_eth_stats *stats);
  60 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  61                                  struct rte_eth_xstat *xstats, unsigned n);
  62 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  63                                        struct rte_eth_xstat_name *xstats_names,
  64                                        unsigned limit);
  65 static int virtio_dev_stats_reset(struct rte_eth_dev *dev);
  66 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  67 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  68                                 uint16_t vlan_id, int on);
  69 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  70                                 struct rte_ether_addr *mac_addr,
  71                                 uint32_t index, uint32_t vmdq);
  72 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  73 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
  74                                 struct rte_ether_addr *mac_addr);
  75
  76 static int virtio_intr_disable(struct rte_eth_dev *dev);
  77
  78 static int virtio_dev_queue_stats_mapping_set(
  79         struct rte_eth_dev *eth_dev,
  80         uint16_t queue_id,
  81         uint8_t stat_idx,
  82         uint8_t is_rx);
  83
  84 static void virtio_notify_peers(struct rte_eth_dev *dev);
  85 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  86
  87 struct rte_virtio_xstats_name_off {
  88         char name[RTE_ETH_XSTATS_NAME_SIZE];
  89         unsigned offset;
  90 };
  91
  92 /* [rt]x_qX_ is prepended to the name string here */
  93 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
  94         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
  95         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
  96         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
  97         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
  98         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
  99         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 100         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 101         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 102         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 103         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 104         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 105         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 106         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 107 };
 108
 109 /* [rt]x_qX_ is prepended to the name string here */
 110 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 111         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 112         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 113         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 114         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 115         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 116         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 117         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 118         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 119         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 120         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 121         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 122         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 123 };
 124
 125 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 126                             sizeof(rte_virtio_rxq_stat_strings[0]))
 127 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 128                             sizeof(rte_virtio_txq_stat_strings[0]))
 129
 130 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 131
 132 static struct virtio_pmd_ctrl *
 133 virtio_send_command_packed(struct virtnet_ctl *cvq,
 134                            struct virtio_pmd_ctrl *ctrl,
 135                            int *dlen, int pkt_num)
 136 {
 137         struct virtqueue *vq = virtnet_cq_to_vq(cvq);
 138         int head;
 139         struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
 140         struct virtio_pmd_ctrl *result;
 141         uint16_t flags;
 142         int sum = 0;
 143         int nb_descs = 0;
 144         int k;
 145
 146         /*
 147          * Format is enforced in qemu code:
 148          * One TX packet for header;
 149          * At least one TX packet per argument;
 150          * One RX packet for ACK.
 151          */
 152         head = vq->vq_avail_idx;
 153         flags = vq->vq_packed.cached_flags;
 154         desc[head].addr = cvq->virtio_net_hdr_mem;
 155         desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 156         vq->vq_free_cnt--;
 157         nb_descs++;
 158         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 159                 vq->vq_avail_idx -= vq->vq_nentries;
 160                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 161         }
 162
 163         for (k = 0; k < pkt_num; k++) {
 164                 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 165                         + sizeof(struct virtio_net_ctrl_hdr)
 166                         + sizeof(ctrl->status) + sizeof(uint8_t) * sum;
 167                 desc[vq->vq_avail_idx].len = dlen[k];
 168                 desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
 169                         vq->vq_packed.cached_flags;
 170                 sum += dlen[k];
 171                 vq->vq_free_cnt--;
 172                 nb_descs++;
 173                 if (++vq->vq_avail_idx >= vq->vq_nentries) {
 174                         vq->vq_avail_idx -= vq->vq_nentries;
 175                         vq->vq_packed.cached_flags ^=
 176                                 VRING_PACKED_DESC_F_AVAIL_USED;
 177                 }
 178         }
 179
 180         desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 181                 + sizeof(struct virtio_net_ctrl_hdr);
 182         desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
 183         desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
 184                 vq->vq_packed.cached_flags;
 185         vq->vq_free_cnt--;
 186         nb_descs++;
 187         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 188                 vq->vq_avail_idx -= vq->vq_nentries;
 189                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 190         }
 191
 192         virtqueue_store_flags_packed(&desc[head], VRING_DESC_F_NEXT | flags,
 193                         vq->hw->weak_barriers);
 194
 195         virtio_wmb(vq->hw->weak_barriers);
 196         virtqueue_notify(vq);
 197
 198         /* wait for used desc in virtqueue
 199          * desc_is_used has a load-acquire or rte_io_rmb inside
 200          */
 201         while (!desc_is_used(&desc[head], vq))
 202                 usleep(100);
 203
 204         /* now get used descriptors */
 205         vq->vq_free_cnt += nb_descs;
 206         vq->vq_used_cons_idx += nb_descs;
 207         if (vq->vq_used_cons_idx >= vq->vq_nentries) {
 208                 vq->vq_used_cons_idx -= vq->vq_nentries;
 209                 vq->vq_packed.used_wrap_counter ^= 1;
 210         }
 211
 212         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
 213                         "vq->vq_avail_idx=%d\n"
 214                         "vq->vq_used_cons_idx=%d\n"
 215                         "vq->vq_packed.cached_flags=0x%x\n"
 216                         "vq->vq_packed.used_wrap_counter=%d",
 217                         vq->vq_free_cnt,
 218                         vq->vq_avail_idx,
 219                         vq->vq_used_cons_idx,
 220                         vq->vq_packed.cached_flags,
 221                         vq->vq_packed.used_wrap_counter);
 222
 223         result = cvq->virtio_net_hdr_mz->addr;
 224         return result;
 225 }
 226
 227 static struct virtio_pmd_ctrl *
 228 virtio_send_command_split(struct virtnet_ctl *cvq,
 229                           struct virtio_pmd_ctrl *ctrl,
 230                           int *dlen, int pkt_num)
 231 {
 232         struct virtio_pmd_ctrl *result;
 233         struct virtqueue *vq = virtnet_cq_to_vq(cvq);
 234         uint32_t head, i;
 235         int k, sum = 0;
 236
 237         head = vq->vq_desc_head_idx;
 238
 239         /*
 240          * Format is enforced in qemu code:
 241          * One TX packet for header;
 242          * At least one TX packet per argument;
 243          * One RX packet for ACK.
 244          */
 245         vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
 246         vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 247         vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 248         vq->vq_free_cnt--;
 249         i = vq->vq_split.ring.desc[head].next;
 250
 251         for (k = 0; k < pkt_num; k++) {
 252                 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
 253                 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 254                         + sizeof(struct virtio_net_ctrl_hdr)
 255                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 256                 vq->vq_split.ring.desc[i].len = dlen[k];
 257                 sum += dlen[k];
 258                 vq->vq_free_cnt--;
 259                 i = vq->vq_split.ring.desc[i].next;
 260         }
 261
 262         vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
 263         vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 264                         + sizeof(struct virtio_net_ctrl_hdr);
 265         vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
 266         vq->vq_free_cnt--;
 267
 268         vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
 269
 270         vq_update_avail_ring(vq, head);
 271         vq_update_avail_idx(vq);
 272
 273         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 274
 275         virtqueue_notify(vq);
 276
 277         while (virtqueue_nused(vq) == 0)
 278                 usleep(100);
 279
 280         while (virtqueue_nused(vq)) {
 281                 uint32_t idx, desc_idx, used_idx;
 282                 struct vring_used_elem *uep;
 283
 284                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 285                                 & (vq->vq_nentries - 1));
 286                 uep = &vq->vq_split.ring.used->ring[used_idx];
 287                 idx = (uint32_t) uep->id;
 288                 desc_idx = idx;
 289
 290                 while (vq->vq_split.ring.desc[desc_idx].flags &
 291                                 VRING_DESC_F_NEXT) {
 292                         desc_idx = vq->vq_split.ring.desc[desc_idx].next;
 293                         vq->vq_free_cnt++;
 294                 }
 295
 296                 vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 297                 vq->vq_desc_head_idx = idx;
 298
 299                 vq->vq_used_cons_idx++;
 300                 vq->vq_free_cnt++;
 301         }
 302
 303         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 304                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 305
 306         result = cvq->virtio_net_hdr_mz->addr;
 307         return result;
 308 }
 309
 310 static int
 311 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 312                     int *dlen, int pkt_num)
 313 {
 314         virtio_net_ctrl_ack status = ~0;
 315         struct virtio_pmd_ctrl *result;
 316         struct virtqueue *vq;
 317
 318         ctrl->status = status;
 319
 320         if (!cvq) {
 321                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 322                 return -1;
 323         }
 324
 325         rte_spinlock_lock(&cvq->lock);
 326         vq = virtnet_cq_to_vq(cvq);
 327
 328         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 329                 "vq->hw->cvq = %p vq = %p",
 330                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 331
 332         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 333                 rte_spinlock_unlock(&cvq->lock);
 334                 return -1;
 335         }
 336
 337         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 338                 sizeof(struct virtio_pmd_ctrl));
 339
 340         if (virtio_with_packed_queue(vq->hw))
 341                 result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
 342         else
 343                 result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
 344
 345         rte_spinlock_unlock(&cvq->lock);
 346         return result->status;
 347 }
 348
 349 static int
 350 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 351 {
 352         struct virtio_hw *hw = dev->data->dev_private;
 353         struct virtio_pmd_ctrl ctrl;
 354         int dlen[1];
 355         int ret;
 356
 357         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 358         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 359         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 360
 361         dlen[0] = sizeof(uint16_t);
 362
 363         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 364         if (ret) {
 365                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 366                           "failed, this is too late now...");
 367                 return -EINVAL;
 368         }
 369
 370         return 0;
 371 }
 372
 373 static uint16_t
 374 virtio_get_nr_vq(struct virtio_hw *hw)
 375 {
 376         uint16_t nr_vq = hw->max_queue_pairs * 2;
 377
 378         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 379                 nr_vq += 1;
 380
 381         return nr_vq;
 382 }
 383
 384 static void
 385 virtio_init_vring(struct virtqueue *vq)
 386 {
 387         int size = vq->vq_nentries;
 388         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 389
 390         PMD_INIT_FUNC_TRACE();
 391
 392         memset(ring_mem, 0, vq->vq_ring_size);
 393
 394         vq->vq_used_cons_idx = 0;
 395         vq->vq_desc_head_idx = 0;
 396         vq->vq_avail_idx = 0;
 397         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 398         vq->vq_free_cnt = vq->vq_nentries;
 399         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 400         if (virtio_with_packed_queue(vq->hw)) {
 401                 vring_init_packed(&vq->vq_packed.ring, ring_mem,
 402                                   VIRTIO_VRING_ALIGN, size);
 403                 vring_desc_init_packed(vq, size);
 404         } else {
 405                 struct vring *vr = &vq->vq_split.ring;
 406
 407                 vring_init_split(vr, ring_mem, VIRTIO_VRING_ALIGN, size);
 408                 vring_desc_init_split(vr->desc, size);
 409         }
 410         /*
 411          * Disable device(host) interrupting guest
 412          */
 413         virtqueue_disable_intr(vq);
 414 }
 415
 416 static int
 417 virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
 418 {
 419         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 420         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 421         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 422         unsigned int vq_size, size;
 423         struct virtio_hw *hw = dev->data->dev_private;
 424         struct virtnet_rx *rxvq = NULL;
 425         struct virtnet_tx *txvq = NULL;
 426         struct virtnet_ctl *cvq = NULL;
 427         struct virtqueue *vq;
 428         size_t sz_hdr_mz = 0;
 429         void *sw_ring = NULL;
 430         int queue_type = virtio_get_queue_type(hw, queue_idx);
 431         int ret;
 432         int numa_node = dev->device->numa_node;
 433         struct rte_mbuf *fake_mbuf = NULL;
 434
 435         PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
 436                         queue_idx, numa_node);
 437
 438         /*
 439          * Read the virtqueue size from the Queue Size field
 440          * Always power of 2 and if 0 virtqueue does not exist
 441          */
 442         vq_size = VIRTIO_OPS(hw)->get_queue_num(hw, queue_idx);
 443         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 444         if (vq_size == 0) {
 445                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 446                 return -EINVAL;
 447         }
 448
 449         if (!virtio_with_packed_queue(hw) && !rte_is_power_of_2(vq_size)) {
 450                 PMD_INIT_LOG(ERR, "split virtqueue size is not power of 2");
 451                 return -EINVAL;
 452         }
 453
 454         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 455                  dev->data->port_id, queue_idx);
 456
 457         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 458                                 vq_size * sizeof(struct vq_desc_extra),
 459                                 RTE_CACHE_LINE_SIZE);
 460         if (queue_type == VTNET_TQ) {
 461                 /*
 462                  * For each xmit packet, allocate a virtio_net_hdr
 463                  * and indirect ring elements
 464                  */
 465                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 466         } else if (queue_type == VTNET_CQ) {
 467                 /* Allocate a page for control vq command, data and status */
 468                 sz_hdr_mz = rte_mem_page_size();
 469         }
 470
 471         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 472                                 numa_node);
 473         if (vq == NULL) {
 474                 PMD_INIT_LOG(ERR, "can not allocate vq");
 475                 return -ENOMEM;
 476         }
 477         hw->vqs[queue_idx] = vq;
 478
 479         vq->hw = hw;
 480         vq->vq_queue_index = queue_idx;
 481         vq->vq_nentries = vq_size;
 482         if (virtio_with_packed_queue(hw)) {
 483                 vq->vq_packed.used_wrap_counter = 1;
 484                 vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
 485                 vq->vq_packed.event_flags_shadow = 0;
 486                 if (queue_type == VTNET_RQ)
 487                         vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
 488         }
 489
 490         /*
 491          * Reserve a memzone for vring elements
 492          */
 493         size = vring_size(hw, vq_size, VIRTIO_VRING_ALIGN);
 494         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_VRING_ALIGN);
 495         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 496                      size, vq->vq_ring_size);
 497
 498         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 499                         numa_node, RTE_MEMZONE_IOVA_CONTIG,
 500                         VIRTIO_VRING_ALIGN);
 501         if (mz == NULL) {
 502                 if (rte_errno == EEXIST)
 503                         mz = rte_memzone_lookup(vq_name);
 504                 if (mz == NULL) {
 505                         ret = -ENOMEM;
 506                         goto free_vq;
 507                 }
 508         }
 509
 510         memset(mz->addr, 0, mz->len);
 511
 512         if (hw->use_va)
 513                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 514         else
 515                 vq->vq_ring_mem = mz->iova;
 516
 517         vq->vq_ring_virt_mem = mz->addr;
 518         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem: 0x%" PRIx64, vq->vq_ring_mem);
 519         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: %p", vq->vq_ring_virt_mem);
 520
 521         virtio_init_vring(vq);
 522
 523         if (sz_hdr_mz) {
 524                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 525                          dev->data->port_id, queue_idx);
 526                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 527                                 numa_node, RTE_MEMZONE_IOVA_CONTIG,
 528                                 RTE_CACHE_LINE_SIZE);
 529                 if (hdr_mz == NULL) {
 530                         if (rte_errno == EEXIST)
 531                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 532                         if (hdr_mz == NULL) {
 533                                 ret = -ENOMEM;
 534                                 goto free_mz;
 535                         }
 536                 }
 537         }
 538
 539         if (queue_type == VTNET_RQ) {
 540                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 541                                sizeof(vq->sw_ring[0]);
 542
 543                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 544                                 RTE_CACHE_LINE_SIZE, numa_node);
 545                 if (!sw_ring) {
 546                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 547                         ret = -ENOMEM;
 548                         goto free_hdr_mz;
 549                 }
 550
 551                 fake_mbuf = rte_zmalloc_socket("sw_ring", sizeof(*fake_mbuf),
 552                                 RTE_CACHE_LINE_SIZE, numa_node);
 553                 if (!fake_mbuf) {
 554                         PMD_INIT_LOG(ERR, "can not allocate fake mbuf");
 555                         ret = -ENOMEM;
 556                         goto free_sw_ring;
 557                 }
 558
 559                 vq->sw_ring = sw_ring;
 560                 rxvq = &vq->rxq;
 561                 rxvq->port_id = dev->data->port_id;
 562                 rxvq->mz = mz;
 563                 rxvq->fake_mbuf = fake_mbuf;
 564         } else if (queue_type == VTNET_TQ) {
 565                 txvq = &vq->txq;
 566                 txvq->port_id = dev->data->port_id;
 567                 txvq->mz = mz;
 568                 txvq->virtio_net_hdr_mz = hdr_mz;
 569                 if (hw->use_va)
 570                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 571                 else
 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                 if (hw->use_va)
 578                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 579                 else
 580                         cvq->virtio_net_hdr_mem = hdr_mz->iova;
 581                 memset(cvq->virtio_net_hdr_mz->addr, 0, rte_mem_page_size());
 582
 583                 hw->cvq = cvq;
 584         }
 585
 586         if (hw->use_va)
 587                 vq->mbuf_addr_offset = offsetof(struct rte_mbuf, buf_addr);
 588         else
 589                 vq->mbuf_addr_offset = offsetof(struct rte_mbuf, buf_iova);
 590
 591         if (queue_type == VTNET_TQ) {
 592                 struct virtio_tx_region *txr;
 593                 unsigned int i;
 594
 595                 txr = hdr_mz->addr;
 596                 memset(txr, 0, vq_size * sizeof(*txr));
 597                 for (i = 0; i < vq_size; i++) {
 598                         /* first indirect descriptor is always the tx header */
 599                         if (!virtio_with_packed_queue(hw)) {
 600                                 struct vring_desc *start_dp = txr[i].tx_indir;
 601                                 vring_desc_init_split(start_dp,
 602                                                       RTE_DIM(txr[i].tx_indir));
 603                                 start_dp->addr = txvq->virtio_net_hdr_mem
 604                                         + i * sizeof(*txr)
 605                                         + offsetof(struct virtio_tx_region,
 606                                                    tx_hdr);
 607                                 start_dp->len = hw->vtnet_hdr_size;
 608                                 start_dp->flags = VRING_DESC_F_NEXT;
 609                         } else {
 610                                 struct vring_packed_desc *start_dp =
 611                                         txr[i].tx_packed_indir;
 612                                 vring_desc_init_indirect_packed(start_dp,
 613                                       RTE_DIM(txr[i].tx_packed_indir));
 614                                 start_dp->addr = txvq->virtio_net_hdr_mem
 615                                         + i * sizeof(*txr)
 616                                         + offsetof(struct virtio_tx_region,
 617                                                    tx_hdr);
 618                                 start_dp->len = hw->vtnet_hdr_size;
 619                         }
 620                 }
 621         }
 622
 623         if (VIRTIO_OPS(hw)->setup_queue(hw, vq) < 0) {
 624                 PMD_INIT_LOG(ERR, "setup_queue failed");
 625                 ret = -EINVAL;
 626                 goto clean_vq;
 627         }
 628
 629         return 0;
 630
 631 clean_vq:
 632         hw->cvq = NULL;
 633         rte_free(fake_mbuf);
 634 free_sw_ring:
 635         rte_free(sw_ring);
 636 free_hdr_mz:
 637         rte_memzone_free(hdr_mz);
 638 free_mz:
 639         rte_memzone_free(mz);
 640 free_vq:
 641         rte_free(vq);
 642         hw->vqs[queue_idx] = NULL;
 643
 644         return ret;
 645 }
 646
 647 static void
 648 virtio_free_queues(struct virtio_hw *hw)
 649 {
 650         uint16_t nr_vq = virtio_get_nr_vq(hw);
 651         struct virtqueue *vq;
 652         int queue_type;
 653         uint16_t i;
 654
 655         if (hw->vqs == NULL)
 656                 return;
 657
 658         for (i = 0; i < nr_vq; i++) {
 659                 vq = hw->vqs[i];
 660                 if (!vq)
 661                         continue;
 662
 663                 queue_type = virtio_get_queue_type(hw, i);
 664                 if (queue_type == VTNET_RQ) {
 665                         rte_free(vq->rxq.fake_mbuf);
 666                         rte_free(vq->sw_ring);
 667                         rte_memzone_free(vq->rxq.mz);
 668                 } else if (queue_type == VTNET_TQ) {
 669                         rte_memzone_free(vq->txq.mz);
 670                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 671                 } else {
 672                         rte_memzone_free(vq->cq.mz);
 673                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 674                 }
 675
 676                 rte_free(vq);
 677                 hw->vqs[i] = NULL;
 678         }
 679
 680         rte_free(hw->vqs);
 681         hw->vqs = NULL;
 682 }
 683
 684 static int
 685 virtio_alloc_queues(struct rte_eth_dev *dev)
 686 {
 687         struct virtio_hw *hw = dev->data->dev_private;
 688         uint16_t nr_vq = virtio_get_nr_vq(hw);
 689         uint16_t i;
 690         int ret;
 691
 692         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 693         if (!hw->vqs) {
 694                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 695                 return -ENOMEM;
 696         }
 697
 698         for (i = 0; i < nr_vq; i++) {
 699                 ret = virtio_init_queue(dev, i);
 700                 if (ret < 0) {
 701                         virtio_free_queues(hw);
 702                         return ret;
 703                 }
 704         }
 705
 706         return 0;
 707 }
 708
 709 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 710
 711 int
 712 virtio_dev_close(struct rte_eth_dev *dev)
 713 {
 714         struct virtio_hw *hw = dev->data->dev_private;
 715         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 716
 717         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 718         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 719                 return 0;
 720
 721         if (!hw->opened)
 722                 return 0;
 723         hw->opened = 0;
 724
 725         /* reset the NIC */
 726         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 727                 VIRTIO_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 728         if (intr_conf->rxq)
 729                 virtio_queues_unbind_intr(dev);
 730
 731         if (intr_conf->lsc || intr_conf->rxq) {
 732                 virtio_intr_disable(dev);
 733                 rte_intr_efd_disable(dev->intr_handle);
 734                 rte_free(dev->intr_handle->intr_vec);
 735                 dev->intr_handle->intr_vec = NULL;
 736         }
 737
 738         virtio_reset(hw);
 739         virtio_dev_free_mbufs(dev);
 740         virtio_free_queues(hw);
 741
 742         return VIRTIO_OPS(hw)->dev_close(hw);
 743 }
 744
 745 static int
 746 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 747 {
 748         struct virtio_hw *hw = dev->data->dev_private;
 749         struct virtio_pmd_ctrl ctrl;
 750         int dlen[1];
 751         int ret;
 752
 753         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 754                 PMD_INIT_LOG(INFO, "host does not support rx control");
 755                 return -ENOTSUP;
 756         }
 757
 758         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 759         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 760         ctrl.data[0] = 1;
 761         dlen[0] = 1;
 762
 763         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 764         if (ret) {
 765                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 766                 return -EAGAIN;
 767         }
 768
 769         return 0;
 770 }
 771
 772 static int
 773 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 774 {
 775         struct virtio_hw *hw = dev->data->dev_private;
 776         struct virtio_pmd_ctrl ctrl;
 777         int dlen[1];
 778         int ret;
 779
 780         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 781                 PMD_INIT_LOG(INFO, "host does not support rx control");
 782                 return -ENOTSUP;
 783         }
 784
 785         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 786         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 787         ctrl.data[0] = 0;
 788         dlen[0] = 1;
 789
 790         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 791         if (ret) {
 792                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 793                 return -EAGAIN;
 794         }
 795
 796         return 0;
 797 }
 798
 799 static int
 800 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 801 {
 802         struct virtio_hw *hw = dev->data->dev_private;
 803         struct virtio_pmd_ctrl ctrl;
 804         int dlen[1];
 805         int ret;
 806
 807         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 808                 PMD_INIT_LOG(INFO, "host does not support rx control");
 809                 return -ENOTSUP;
 810         }
 811
 812         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 813         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 814         ctrl.data[0] = 1;
 815         dlen[0] = 1;
 816
 817         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 818         if (ret) {
 819                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 820                 return -EAGAIN;
 821         }
 822
 823         return 0;
 824 }
 825
 826 static int
 827 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 828 {
 829         struct virtio_hw *hw = dev->data->dev_private;
 830         struct virtio_pmd_ctrl ctrl;
 831         int dlen[1];
 832         int ret;
 833
 834         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 835                 PMD_INIT_LOG(INFO, "host does not support rx control");
 836                 return -ENOTSUP;
 837         }
 838
 839         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 840         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 841         ctrl.data[0] = 0;
 842         dlen[0] = 1;
 843
 844         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 845         if (ret) {
 846                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 847                 return -EAGAIN;
 848         }
 849
 850         return 0;
 851 }
 852
 853 uint16_t
 854 virtio_rx_mem_pool_buf_size(struct rte_mempool *mp)
 855 {
 856         return rte_pktmbuf_data_room_size(mp) - RTE_PKTMBUF_HEADROOM;
 857 }
 858
 859 bool
 860 virtio_rx_check_scatter(uint16_t max_rx_pkt_len, uint16_t rx_buf_size,
 861                         bool rx_scatter_enabled, const char **error)
 862 {
 863         if (!rx_scatter_enabled && max_rx_pkt_len > rx_buf_size) {
 864                 *error = "Rx scatter is disabled and RxQ mbuf pool object size is too small";
 865                 return false;
 866         }
 867
 868         return true;
 869 }
 870
 871 static bool
 872 virtio_check_scatter_on_all_rx_queues(struct rte_eth_dev *dev,
 873                                       uint16_t frame_size)
 874 {
 875         struct virtio_hw *hw = dev->data->dev_private;
 876         struct virtnet_rx *rxvq;
 877         struct virtqueue *vq;
 878         unsigned int qidx;
 879         uint16_t buf_size;
 880         const char *error;
 881
 882         if (hw->vqs == NULL)
 883                 return true;
 884
 885         for (qidx = 0; (vq = hw->vqs[2 * qidx + VTNET_SQ_RQ_QUEUE_IDX]) != NULL;
 886              qidx++) {
 887                 rxvq = &vq->rxq;
 888                 if (rxvq->mpool == NULL)
 889                         continue;
 890                 buf_size = virtio_rx_mem_pool_buf_size(rxvq->mpool);
 891
 892                 if (!virtio_rx_check_scatter(frame_size, buf_size,
 893                                              hw->rx_ol_scatter, &error)) {
 894                         PMD_INIT_LOG(ERR, "MTU check for RxQ %u failed: %s",
 895                                      qidx, error);
 896                         return false;
 897                 }
 898         }
 899
 900         return true;
 901 }
 902
 903 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 904 static int
 905 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 906 {
 907         struct virtio_hw *hw = dev->data->dev_private;
 908         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 909                                  hw->vtnet_hdr_size;
 910         uint32_t frame_size = mtu + ether_hdr_len;
 911         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 912
 913         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 914
 915         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 916                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 917                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 918                 return -EINVAL;
 919         }
 920
 921         if (!virtio_check_scatter_on_all_rx_queues(dev, frame_size)) {
 922                 PMD_INIT_LOG(ERR, "MTU vs Rx scatter and Rx buffers check failed");
 923                 return -EINVAL;
 924         }
 925
 926         hw->max_rx_pkt_len = frame_size;
 927         dev->data->dev_conf.rxmode.max_rx_pkt_len = hw->max_rx_pkt_len;
 928
 929         return 0;
 930 }
 931
 932 static int
 933 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 934 {
 935         struct virtio_hw *hw = dev->data->dev_private;
 936         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 937         struct virtqueue *vq = virtnet_rxq_to_vq(rxvq);
 938
 939         virtqueue_enable_intr(vq);
 940         virtio_mb(hw->weak_barriers);
 941         return 0;
 942 }
 943
 944 static int
 945 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 946 {
 947         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 948         struct virtqueue *vq = virtnet_rxq_to_vq(rxvq);
 949
 950         virtqueue_disable_intr(vq);
 951         return 0;
 952 }
 953
 954 /*
 955  * dev_ops for virtio, bare necessities for basic operation
 956  */
 957 static const struct eth_dev_ops virtio_eth_dev_ops = {
 958         .dev_configure           = virtio_dev_configure,
 959         .dev_start               = virtio_dev_start,
 960         .dev_stop                = virtio_dev_stop,
 961         .dev_close               = virtio_dev_close,
 962         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 963         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 964         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 965         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 966         .mtu_set                 = virtio_mtu_set,
 967         .dev_infos_get           = virtio_dev_info_get,
 968         .stats_get               = virtio_dev_stats_get,
 969         .xstats_get              = virtio_dev_xstats_get,
 970         .xstats_get_names        = virtio_dev_xstats_get_names,
 971         .stats_reset             = virtio_dev_stats_reset,
 972         .xstats_reset            = virtio_dev_stats_reset,
 973         .link_update             = virtio_dev_link_update,
 974         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 975         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 976         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 977         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 978         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 979         /* collect stats per queue */
 980         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 981         .vlan_filter_set         = virtio_vlan_filter_set,
 982         .mac_addr_add            = virtio_mac_addr_add,
 983         .mac_addr_remove         = virtio_mac_addr_remove,
 984         .mac_addr_set            = virtio_mac_addr_set,
 985 };
 986
 987 /*
 988  * dev_ops for virtio-user in secondary processes, as we just have
 989  * some limited supports currently.
 990  */
 991 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 992         .dev_infos_get           = virtio_dev_info_get,
 993         .stats_get               = virtio_dev_stats_get,
 994         .xstats_get              = virtio_dev_xstats_get,
 995         .xstats_get_names        = virtio_dev_xstats_get_names,
 996         .stats_reset             = virtio_dev_stats_reset,
 997         .xstats_reset            = virtio_dev_stats_reset,
 998         /* collect stats per queue */
 999         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
1000 };
1001
1002 static void
1003 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1004 {
1005         unsigned i;
1006
1007         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1008                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
1009                 if (txvq == NULL)
1010                         continue;
1011
1012                 stats->opackets += txvq->stats.packets;
1013                 stats->obytes += txvq->stats.bytes;
1014
1015                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
1016                         stats->q_opackets[i] = txvq->stats.packets;
1017                         stats->q_obytes[i] = txvq->stats.bytes;
1018                 }
1019         }
1020
1021         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1022                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1023                 if (rxvq == NULL)
1024                         continue;
1025
1026                 stats->ipackets += rxvq->stats.packets;
1027                 stats->ibytes += rxvq->stats.bytes;
1028                 stats->ierrors += rxvq->stats.errors;
1029
1030                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
1031                         stats->q_ipackets[i] = rxvq->stats.packets;
1032                         stats->q_ibytes[i] = rxvq->stats.bytes;
1033                 }
1034         }
1035
1036         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
1037 }
1038
1039 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
1040                                        struct rte_eth_xstat_name *xstats_names,
1041                                        __rte_unused unsigned limit)
1042 {
1043         unsigned i;
1044         unsigned count = 0;
1045         unsigned t;
1046
1047         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1048                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1049
1050         if (xstats_names != NULL) {
1051                 /* Note: limit checked in rte_eth_xstats_names() */
1052
1053                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1054                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1055                         if (rxvq == NULL)
1056                                 continue;
1057                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1058                                 snprintf(xstats_names[count].name,
1059                                         sizeof(xstats_names[count].name),
1060                                         "rx_q%u_%s", i,
1061                                         rte_virtio_rxq_stat_strings[t].name);
1062                                 count++;
1063                         }
1064                 }
1065
1066                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1067                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1068                         if (txvq == NULL)
1069                                 continue;
1070                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1071                                 snprintf(xstats_names[count].name,
1072                                         sizeof(xstats_names[count].name),
1073                                         "tx_q%u_%s", i,
1074                                         rte_virtio_txq_stat_strings[t].name);
1075                                 count++;
1076                         }
1077                 }
1078                 return count;
1079         }
1080         return nstats;
1081 }
1082
1083 static int
1084 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1085                       unsigned n)
1086 {
1087         unsigned i;
1088         unsigned count = 0;
1089
1090         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1091                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1092
1093         if (n < nstats)
1094                 return nstats;
1095
1096         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1097                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1098
1099                 if (rxvq == NULL)
1100                         continue;
1101
1102                 unsigned t;
1103
1104                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1105                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1106                                 rte_virtio_rxq_stat_strings[t].offset);
1107                         xstats[count].id = count;
1108                         count++;
1109                 }
1110         }
1111
1112         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1113                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1114
1115                 if (txvq == NULL)
1116                         continue;
1117
1118                 unsigned t;
1119
1120                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1121                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1122                                 rte_virtio_txq_stat_strings[t].offset);
1123                         xstats[count].id = count;
1124                         count++;
1125                 }
1126         }
1127
1128         return count;
1129 }
1130
1131 static int
1132 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1133 {
1134         virtio_update_stats(dev, stats);
1135
1136         return 0;
1137 }
1138
1139 static int
1140 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1141 {
1142         unsigned int i;
1143
1144         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1145                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1146                 if (txvq == NULL)
1147                         continue;
1148
1149                 txvq->stats.packets = 0;
1150                 txvq->stats.bytes = 0;
1151                 txvq->stats.multicast = 0;
1152                 txvq->stats.broadcast = 0;
1153                 memset(txvq->stats.size_bins, 0,
1154                        sizeof(txvq->stats.size_bins[0]) * 8);
1155         }
1156
1157         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1158                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1159                 if (rxvq == NULL)
1160                         continue;
1161
1162                 rxvq->stats.packets = 0;
1163                 rxvq->stats.bytes = 0;
1164                 rxvq->stats.errors = 0;
1165                 rxvq->stats.multicast = 0;
1166                 rxvq->stats.broadcast = 0;
1167                 memset(rxvq->stats.size_bins, 0,
1168                        sizeof(rxvq->stats.size_bins[0]) * 8);
1169         }
1170
1171         return 0;
1172 }
1173
1174 static void
1175 virtio_set_hwaddr(struct virtio_hw *hw)
1176 {
1177         virtio_write_dev_config(hw,
1178                         offsetof(struct virtio_net_config, mac),
1179                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1180 }
1181
1182 static void
1183 virtio_get_hwaddr(struct virtio_hw *hw)
1184 {
1185         if (virtio_with_feature(hw, VIRTIO_NET_F_MAC)) {
1186                 virtio_read_dev_config(hw,
1187                         offsetof(struct virtio_net_config, mac),
1188                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1189         } else {
1190                 rte_eth_random_addr(&hw->mac_addr[0]);
1191                 virtio_set_hwaddr(hw);
1192         }
1193 }
1194
1195 static int
1196 virtio_mac_table_set(struct virtio_hw *hw,
1197                      const struct virtio_net_ctrl_mac *uc,
1198                      const struct virtio_net_ctrl_mac *mc)
1199 {
1200         struct virtio_pmd_ctrl ctrl;
1201         int err, len[2];
1202
1203         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1204                 PMD_DRV_LOG(INFO, "host does not support mac table");
1205                 return -1;
1206         }
1207
1208         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1209         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1210
1211         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1212         memcpy(ctrl.data, uc, len[0]);
1213
1214         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1215         memcpy(ctrl.data + len[0], mc, len[1]);
1216
1217         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1218         if (err != 0)
1219                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1220         return err;
1221 }
1222
1223 static int
1224 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1225                     uint32_t index, uint32_t vmdq __rte_unused)
1226 {
1227         struct virtio_hw *hw = dev->data->dev_private;
1228         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1229         unsigned int i;
1230         struct virtio_net_ctrl_mac *uc, *mc;
1231
1232         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1233                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1234                 return -EINVAL;
1235         }
1236
1237         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1238                 sizeof(uc->entries));
1239         uc->entries = 0;
1240         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1241                 sizeof(mc->entries));
1242         mc->entries = 0;
1243
1244         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1245                 const struct rte_ether_addr *addr
1246                         = (i == index) ? mac_addr : addrs + i;
1247                 struct virtio_net_ctrl_mac *tbl
1248                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1249
1250                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1251         }
1252
1253         return virtio_mac_table_set(hw, uc, mc);
1254 }
1255
1256 static void
1257 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1258 {
1259         struct virtio_hw *hw = dev->data->dev_private;
1260         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1261         struct virtio_net_ctrl_mac *uc, *mc;
1262         unsigned int i;
1263
1264         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1265                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1266                 return;
1267         }
1268
1269         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1270                 sizeof(uc->entries));
1271         uc->entries = 0;
1272         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1273                 sizeof(mc->entries));
1274         mc->entries = 0;
1275
1276         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1277                 struct virtio_net_ctrl_mac *tbl;
1278
1279                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1280                         continue;
1281
1282                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1283                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1284                         RTE_ETHER_ADDR_LEN);
1285         }
1286
1287         virtio_mac_table_set(hw, uc, mc);
1288 }
1289
1290 static int
1291 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1292 {
1293         struct virtio_hw *hw = dev->data->dev_private;
1294
1295         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1296
1297         /* Use atomic update if available */
1298         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1299                 struct virtio_pmd_ctrl ctrl;
1300                 int len = RTE_ETHER_ADDR_LEN;
1301
1302                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1303                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1304
1305                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1306                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1307         }
1308
1309         if (!virtio_with_feature(hw, VIRTIO_NET_F_MAC))
1310                 return -ENOTSUP;
1311
1312         virtio_set_hwaddr(hw);
1313         return 0;
1314 }
1315
1316 static int
1317 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1318 {
1319         struct virtio_hw *hw = dev->data->dev_private;
1320         struct virtio_pmd_ctrl ctrl;
1321         int len;
1322
1323         if (!virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1324                 return -ENOTSUP;
1325
1326         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1327         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1328         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1329         len = sizeof(vlan_id);
1330
1331         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1332 }
1333
1334 static int
1335 virtio_intr_unmask(struct rte_eth_dev *dev)
1336 {
1337         struct virtio_hw *hw = dev->data->dev_private;
1338
1339         if (rte_intr_ack(dev->intr_handle) < 0)
1340                 return -1;
1341
1342         if (VIRTIO_OPS(hw)->intr_detect)
1343                 VIRTIO_OPS(hw)->intr_detect(hw);
1344
1345         return 0;
1346 }
1347
1348 static int
1349 virtio_intr_enable(struct rte_eth_dev *dev)
1350 {
1351         struct virtio_hw *hw = dev->data->dev_private;
1352
1353         if (rte_intr_enable(dev->intr_handle) < 0)
1354                 return -1;
1355
1356         if (VIRTIO_OPS(hw)->intr_detect)
1357                 VIRTIO_OPS(hw)->intr_detect(hw);
1358
1359         return 0;
1360 }
1361
1362 static int
1363 virtio_intr_disable(struct rte_eth_dev *dev)
1364 {
1365         struct virtio_hw *hw = dev->data->dev_private;
1366
1367         if (rte_intr_disable(dev->intr_handle) < 0)
1368                 return -1;
1369
1370         if (VIRTIO_OPS(hw)->intr_detect)
1371                 VIRTIO_OPS(hw)->intr_detect(hw);
1372
1373         return 0;
1374 }
1375
1376 static int
1377 virtio_ethdev_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1378 {
1379         uint64_t host_features;
1380
1381         /* Prepare guest_features: feature that driver wants to support */
1382         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1383                 req_features);
1384
1385         /* Read device(host) feature bits */
1386         host_features = VIRTIO_OPS(hw)->get_features(hw);
1387         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1388                 host_features);
1389
1390         /* If supported, ensure MTU value is valid before acknowledging it. */
1391         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1392                 struct virtio_net_config config;
1393
1394                 virtio_read_dev_config(hw,
1395                         offsetof(struct virtio_net_config, mtu),
1396                         &config.mtu, sizeof(config.mtu));
1397
1398                 if (config.mtu < RTE_ETHER_MIN_MTU)
1399                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1400         }
1401
1402         /*
1403          * Negotiate features: Subset of device feature bits are written back
1404          * guest feature bits.
1405          */
1406         hw->guest_features = req_features;
1407         hw->guest_features = virtio_negotiate_features(hw, host_features);
1408         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1409                 hw->guest_features);
1410
1411         if (VIRTIO_OPS(hw)->features_ok(hw) < 0)
1412                 return -1;
1413
1414         if (virtio_with_feature(hw, VIRTIO_F_VERSION_1)) {
1415                 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1416
1417                 if (!(virtio_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1418                         PMD_INIT_LOG(ERR, "Failed to set FEATURES_OK status!");
1419                         return -1;
1420                 }
1421         }
1422
1423         hw->req_guest_features = req_features;
1424
1425         return 0;
1426 }
1427
1428 int
1429 virtio_dev_pause(struct rte_eth_dev *dev)
1430 {
1431         struct virtio_hw *hw = dev->data->dev_private;
1432
1433         rte_spinlock_lock(&hw->state_lock);
1434
1435         if (hw->started == 0) {
1436                 /* Device is just stopped. */
1437                 rte_spinlock_unlock(&hw->state_lock);
1438                 return -1;
1439         }
1440         hw->started = 0;
1441         /*
1442          * Prevent the worker threads from touching queues to avoid contention,
1443          * 1 ms should be enough for the ongoing Tx function to finish.
1444          */
1445         rte_delay_ms(1);
1446         return 0;
1447 }
1448
1449 /*
1450  * Recover hw state to let the worker threads continue.
1451  */
1452 void
1453 virtio_dev_resume(struct rte_eth_dev *dev)
1454 {
1455         struct virtio_hw *hw = dev->data->dev_private;
1456
1457         hw->started = 1;
1458         rte_spinlock_unlock(&hw->state_lock);
1459 }
1460
1461 /*
1462  * Should be called only after device is paused.
1463  */
1464 int
1465 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1466                 int nb_pkts)
1467 {
1468         struct virtio_hw *hw = dev->data->dev_private;
1469         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1470         int ret;
1471
1472         hw->inject_pkts = tx_pkts;
1473         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1474         hw->inject_pkts = NULL;
1475
1476         return ret;
1477 }
1478
1479 static void
1480 virtio_notify_peers(struct rte_eth_dev *dev)
1481 {
1482         struct virtio_hw *hw = dev->data->dev_private;
1483         struct virtnet_rx *rxvq;
1484         struct rte_mbuf *rarp_mbuf;
1485
1486         if (!dev->data->rx_queues)
1487                 return;
1488
1489         rxvq = dev->data->rx_queues[0];
1490         if (!rxvq)
1491                 return;
1492
1493         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1494                         (struct rte_ether_addr *)hw->mac_addr);
1495         if (rarp_mbuf == NULL) {
1496                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1497                 return;
1498         }
1499
1500         /* If virtio port just stopped, no need to send RARP */
1501         if (virtio_dev_pause(dev) < 0) {
1502                 rte_pktmbuf_free(rarp_mbuf);
1503                 return;
1504         }
1505
1506         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1507         virtio_dev_resume(dev);
1508 }
1509
1510 static void
1511 virtio_ack_link_announce(struct rte_eth_dev *dev)
1512 {
1513         struct virtio_hw *hw = dev->data->dev_private;
1514         struct virtio_pmd_ctrl ctrl;
1515
1516         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1517         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1518
1519         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1520 }
1521
1522 /*
1523  * Process virtio config changed interrupt. Call the callback
1524  * if link state changed, generate gratuitous RARP packet if
1525  * the status indicates an ANNOUNCE.
1526  */
1527 void
1528 virtio_interrupt_handler(void *param)
1529 {
1530         struct rte_eth_dev *dev = param;
1531         struct virtio_hw *hw = dev->data->dev_private;
1532         uint8_t isr;
1533         uint16_t status;
1534
1535         /* Read interrupt status which clears interrupt */
1536         isr = virtio_get_isr(hw);
1537         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1538
1539         if (virtio_intr_unmask(dev) < 0)
1540                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1541
1542         if (isr & VIRTIO_ISR_CONFIG) {
1543                 if (virtio_dev_link_update(dev, 0) == 0)
1544                         rte_eth_dev_callback_process(dev,
1545                                                      RTE_ETH_EVENT_INTR_LSC,
1546                                                      NULL);
1547
1548                 if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1549                         virtio_read_dev_config(hw,
1550                                 offsetof(struct virtio_net_config, status),
1551                                 &status, sizeof(status));
1552                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1553                                 virtio_notify_peers(dev);
1554                                 if (hw->cvq)
1555                                         virtio_ack_link_announce(dev);
1556                         }
1557                 }
1558         }
1559 }
1560
1561 /* set rx and tx handlers according to what is supported */
1562 static void
1563 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1564 {
1565         struct virtio_hw *hw = eth_dev->data->dev_private;
1566
1567         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1568         if (virtio_with_packed_queue(hw)) {
1569                 PMD_INIT_LOG(INFO,
1570                         "virtio: using packed ring %s Tx path on port %u",
1571                         hw->use_vec_tx ? "vectorized" : "standard",
1572                         eth_dev->data->port_id);
1573                 if (hw->use_vec_tx)
1574                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed_vec;
1575                 else
1576                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1577         } else {
1578                 if (hw->use_inorder_tx) {
1579                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1580                                 eth_dev->data->port_id);
1581                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1582                 } else {
1583                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1584                                 eth_dev->data->port_id);
1585                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1586                 }
1587         }
1588
1589         if (virtio_with_packed_queue(hw)) {
1590                 if (hw->use_vec_rx) {
1591                         PMD_INIT_LOG(INFO,
1592                                 "virtio: using packed ring vectorized Rx path on port %u",
1593                                 eth_dev->data->port_id);
1594                         eth_dev->rx_pkt_burst =
1595                                 &virtio_recv_pkts_packed_vec;
1596                 } else if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1597                         PMD_INIT_LOG(INFO,
1598                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1599                                 eth_dev->data->port_id);
1600                         eth_dev->rx_pkt_burst =
1601                                 &virtio_recv_mergeable_pkts_packed;
1602                 } else {
1603                         PMD_INIT_LOG(INFO,
1604                                 "virtio: using packed ring standard Rx path on port %u",
1605                                 eth_dev->data->port_id);
1606                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1607                 }
1608         } else {
1609                 if (hw->use_vec_rx) {
1610                         PMD_INIT_LOG(INFO, "virtio: using vectorized Rx path on port %u",
1611                                 eth_dev->data->port_id);
1612                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1613                 } else if (hw->use_inorder_rx) {
1614                         PMD_INIT_LOG(INFO,
1615                                 "virtio: using inorder Rx path on port %u",
1616                                 eth_dev->data->port_id);
1617                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1618                 } else if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1619                         PMD_INIT_LOG(INFO,
1620                                 "virtio: using mergeable buffer Rx path on port %u",
1621                                 eth_dev->data->port_id);
1622                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1623                 } else {
1624                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1625                                 eth_dev->data->port_id);
1626                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1627                 }
1628         }
1629
1630 }
1631
1632 /* Only support 1:1 queue/interrupt mapping so far.
1633  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1634  * interrupt vectors (<N+1).
1635  */
1636 static int
1637 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1638 {
1639         uint32_t i;
1640         struct virtio_hw *hw = dev->data->dev_private;
1641
1642         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1643         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1644                 dev->intr_handle->intr_vec[i] = i + 1;
1645                 if (VIRTIO_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1646                                                  VIRTIO_MSI_NO_VECTOR) {
1647                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1648                         return -EBUSY;
1649                 }
1650         }
1651
1652         return 0;
1653 }
1654
1655 static void
1656 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1657 {
1658         uint32_t i;
1659         struct virtio_hw *hw = dev->data->dev_private;
1660
1661         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1662         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1663                 VIRTIO_OPS(hw)->set_queue_irq(hw,
1664                                              hw->vqs[i * VTNET_CQ],
1665                                              VIRTIO_MSI_NO_VECTOR);
1666 }
1667
1668 static int
1669 virtio_configure_intr(struct rte_eth_dev *dev)
1670 {
1671         struct virtio_hw *hw = dev->data->dev_private;
1672
1673         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1674                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1675                 return -ENOTSUP;
1676         }
1677
1678         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1679                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1680                 return -1;
1681         }
1682
1683         if (!dev->intr_handle->intr_vec) {
1684                 dev->intr_handle->intr_vec =
1685                         rte_zmalloc("intr_vec",
1686                                     hw->max_queue_pairs * sizeof(int), 0);
1687                 if (!dev->intr_handle->intr_vec) {
1688                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1689                                      hw->max_queue_pairs);
1690                         return -ENOMEM;
1691                 }
1692         }
1693
1694         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
1695                 /* Re-register callback to update max_intr */
1696                 rte_intr_callback_unregister(dev->intr_handle,
1697                                              virtio_interrupt_handler,
1698                                              dev);
1699                 rte_intr_callback_register(dev->intr_handle,
1700                                            virtio_interrupt_handler,
1701                                            dev);
1702         }
1703
1704         /* DO NOT try to remove this! This function will enable msix, or QEMU
1705          * will encounter SIGSEGV when DRIVER_OK is sent.
1706          * And for legacy devices, this should be done before queue/vec binding
1707          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1708          * (22) will be ignored.
1709          */
1710         if (virtio_intr_enable(dev) < 0) {
1711                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1712                 return -1;
1713         }
1714
1715         if (virtio_queues_bind_intr(dev) < 0) {
1716                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1717                 return -1;
1718         }
1719
1720         return 0;
1721 }
1722 #define DUPLEX_UNKNOWN   0xff
1723 /* reset device and renegotiate features if needed */
1724 static int
1725 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1726 {
1727         struct virtio_hw *hw = eth_dev->data->dev_private;
1728         struct virtio_net_config *config;
1729         struct virtio_net_config local_config;
1730         int ret;
1731
1732         /* Reset the device although not necessary at startup */
1733         virtio_reset(hw);
1734
1735         if (hw->vqs) {
1736                 virtio_dev_free_mbufs(eth_dev);
1737                 virtio_free_queues(hw);
1738         }
1739
1740         /* Tell the host we've noticed this device. */
1741         virtio_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1742
1743         /* Tell the host we've known how to drive the device. */
1744         virtio_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1745         if (virtio_ethdev_negotiate_features(hw, req_features) < 0)
1746                 return -1;
1747
1748         hw->weak_barriers = !virtio_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1749
1750         /* If host does not support both status and MSI-X then disable LSC */
1751         if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->intr_lsc)
1752                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1753         else
1754                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1755
1756         eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1757
1758         /* Setting up rx_header size for the device */
1759         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1760             virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
1761             virtio_with_packed_queue(hw))
1762                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1763         else
1764                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1765
1766         /* Copy the permanent MAC address to: virtio_hw */
1767         virtio_get_hwaddr(hw);
1768         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1769                         &eth_dev->data->mac_addrs[0]);
1770         PMD_INIT_LOG(DEBUG,
1771                      "PORT MAC: " RTE_ETHER_ADDR_PRT_FMT,
1772                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1773                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1774
1775         if (hw->speed == ETH_SPEED_NUM_UNKNOWN) {
1776                 if (virtio_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) {
1777                         config = &local_config;
1778                         virtio_read_dev_config(hw,
1779                                 offsetof(struct virtio_net_config, speed),
1780                                 &config->speed, sizeof(config->speed));
1781                         virtio_read_dev_config(hw,
1782                                 offsetof(struct virtio_net_config, duplex),
1783                                 &config->duplex, sizeof(config->duplex));
1784                         hw->speed = config->speed;
1785                         hw->duplex = config->duplex;
1786                 }
1787         }
1788         if (hw->duplex == DUPLEX_UNKNOWN)
1789                 hw->duplex = ETH_LINK_FULL_DUPLEX;
1790         PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d",
1791                 hw->speed, hw->duplex);
1792         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1793                 config = &local_config;
1794
1795                 virtio_read_dev_config(hw,
1796                         offsetof(struct virtio_net_config, mac),
1797                         &config->mac, sizeof(config->mac));
1798
1799                 if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1800                         virtio_read_dev_config(hw,
1801                                 offsetof(struct virtio_net_config, status),
1802                                 &config->status, sizeof(config->status));
1803                 } else {
1804                         PMD_INIT_LOG(DEBUG,
1805                                      "VIRTIO_NET_F_STATUS is not supported");
1806                         config->status = 0;
1807                 }
1808
1809                 if (virtio_with_feature(hw, VIRTIO_NET_F_MQ)) {
1810                         virtio_read_dev_config(hw,
1811                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1812                                 &config->max_virtqueue_pairs,
1813                                 sizeof(config->max_virtqueue_pairs));
1814                 } else {
1815                         PMD_INIT_LOG(DEBUG,
1816                                      "VIRTIO_NET_F_MQ is not supported");
1817                         config->max_virtqueue_pairs = 1;
1818                 }
1819
1820                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1821
1822                 if (virtio_with_feature(hw, VIRTIO_NET_F_MTU)) {
1823                         virtio_read_dev_config(hw,
1824                                 offsetof(struct virtio_net_config, mtu),
1825                                 &config->mtu,
1826                                 sizeof(config->mtu));
1827
1828                         /*
1829                          * MTU value has already been checked at negotiation
1830                          * time, but check again in case it has changed since
1831                          * then, which should not happen.
1832                          */
1833                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1834                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1835                                                 config->mtu);
1836                                 return -1;
1837                         }
1838
1839                         hw->max_mtu = config->mtu;
1840                         /* Set initial MTU to maximum one supported by vhost */
1841                         eth_dev->data->mtu = config->mtu;
1842
1843                 } else {
1844                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1845                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1846                 }
1847
1848                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1849                                 config->max_virtqueue_pairs);
1850                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1851                 PMD_INIT_LOG(DEBUG,
1852                                 "PORT MAC: " RTE_ETHER_ADDR_PRT_FMT,
1853                                 config->mac[0], config->mac[1],
1854                                 config->mac[2], config->mac[3],
1855                                 config->mac[4], config->mac[5]);
1856         } else {
1857                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1858                 hw->max_queue_pairs = 1;
1859                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1860                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1861         }
1862
1863         ret = virtio_alloc_queues(eth_dev);
1864         if (ret < 0)
1865                 return ret;
1866
1867         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1868                 if (virtio_configure_intr(eth_dev) < 0) {
1869                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1870                         virtio_free_queues(hw);
1871                         return -1;
1872                 }
1873         }
1874
1875         virtio_reinit_complete(hw);
1876
1877         return 0;
1878 }
1879
1880 /*
1881  * This function is based on probe() function in virtio_pci.c
1882  * It returns 0 on success.
1883  */
1884 int
1885 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1886 {
1887         struct virtio_hw *hw = eth_dev->data->dev_private;
1888         uint32_t speed = ETH_SPEED_NUM_UNKNOWN;
1889         int vectorized = 0;
1890         int ret;
1891
1892         if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1893                 PMD_INIT_LOG(ERR,
1894                         "Not sufficient headroom required = %d, avail = %d",
1895                         (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1896                         RTE_PKTMBUF_HEADROOM);
1897
1898                 return -1;
1899         }
1900
1901         eth_dev->dev_ops = &virtio_eth_dev_ops;
1902
1903         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1904                 set_rxtx_funcs(eth_dev);
1905                 return 0;
1906         }
1907
1908         ret = virtio_dev_devargs_parse(eth_dev->device->devargs, &speed, &vectorized);
1909         if (ret < 0)
1910                 return ret;
1911         hw->speed = speed;
1912         hw->duplex = DUPLEX_UNKNOWN;
1913
1914         /* Allocate memory for storing MAC addresses */
1915         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1916                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1917         if (eth_dev->data->mac_addrs == NULL) {
1918                 PMD_INIT_LOG(ERR,
1919                         "Failed to allocate %d bytes needed to store MAC addresses",
1920                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1921                 return -ENOMEM;
1922         }
1923
1924         rte_spinlock_init(&hw->state_lock);
1925
1926         /* reset device and negotiate default features */
1927         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1928         if (ret < 0)
1929                 goto err_virtio_init;
1930
1931         if (vectorized) {
1932                 if (!virtio_with_packed_queue(hw)) {
1933                         hw->use_vec_rx = 1;
1934                 } else {
1935 #if defined(CC_AVX512_SUPPORT) || defined(RTE_ARCH_ARM)
1936                         hw->use_vec_rx = 1;
1937                         hw->use_vec_tx = 1;
1938 #else
1939                         PMD_DRV_LOG(INFO,
1940                                 "building environment do not support packed ring vectorized");
1941 #endif
1942                 }
1943         }
1944
1945         hw->opened = 1;
1946
1947         return 0;
1948
1949 err_virtio_init:
1950         rte_free(eth_dev->data->mac_addrs);
1951         eth_dev->data->mac_addrs = NULL;
1952         return ret;
1953 }
1954
1955 static uint32_t
1956 virtio_dev_speed_capa_get(uint32_t speed)
1957 {
1958         switch (speed) {
1959         case ETH_SPEED_NUM_10G:
1960                 return ETH_LINK_SPEED_10G;
1961         case ETH_SPEED_NUM_20G:
1962                 return ETH_LINK_SPEED_20G;
1963         case ETH_SPEED_NUM_25G:
1964                 return ETH_LINK_SPEED_25G;
1965         case ETH_SPEED_NUM_40G:
1966                 return ETH_LINK_SPEED_40G;
1967         case ETH_SPEED_NUM_50G:
1968                 return ETH_LINK_SPEED_50G;
1969         case ETH_SPEED_NUM_56G:
1970                 return ETH_LINK_SPEED_56G;
1971         case ETH_SPEED_NUM_100G:
1972                 return ETH_LINK_SPEED_100G;
1973         case ETH_SPEED_NUM_200G:
1974                 return ETH_LINK_SPEED_200G;
1975         default:
1976                 return 0;
1977         }
1978 }
1979
1980 static int vectorized_check_handler(__rte_unused const char *key,
1981                 const char *value, void *ret_val)
1982 {
1983         if (strcmp(value, "1") == 0)
1984                 *(int *)ret_val = 1;
1985         else
1986                 *(int *)ret_val = 0;
1987
1988         return 0;
1989 }
1990
1991 #define VIRTIO_ARG_SPEED      "speed"
1992 #define VIRTIO_ARG_VECTORIZED "vectorized"
1993
1994 static int
1995 link_speed_handler(const char *key __rte_unused,
1996                 const char *value, void *ret_val)
1997 {
1998         uint32_t val;
1999         if (!value || !ret_val)
2000                 return -EINVAL;
2001         val = strtoul(value, NULL, 0);
2002         /* validate input */
2003         if (virtio_dev_speed_capa_get(val) == 0)
2004                 return -EINVAL;
2005         *(uint32_t *)ret_val = val;
2006
2007         return 0;
2008 }
2009
2010
2011 static int
2012 virtio_dev_devargs_parse(struct rte_devargs *devargs, uint32_t *speed, int *vectorized)
2013 {
2014         struct rte_kvargs *kvlist;
2015         int ret = 0;
2016
2017         if (devargs == NULL)
2018                 return 0;
2019
2020         kvlist = rte_kvargs_parse(devargs->args, NULL);
2021         if (kvlist == NULL) {
2022                 PMD_INIT_LOG(ERR, "error when parsing param");
2023                 return 0;
2024         }
2025
2026         if (speed && rte_kvargs_count(kvlist, VIRTIO_ARG_SPEED) == 1) {
2027                 ret = rte_kvargs_process(kvlist,
2028                                         VIRTIO_ARG_SPEED,
2029                                         link_speed_handler, speed);
2030                 if (ret < 0) {
2031                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2032                                         VIRTIO_ARG_SPEED);
2033                         goto exit;
2034                 }
2035         }
2036
2037         if (vectorized &&
2038                 rte_kvargs_count(kvlist, VIRTIO_ARG_VECTORIZED) == 1) {
2039                 ret = rte_kvargs_process(kvlist,
2040                                 VIRTIO_ARG_VECTORIZED,
2041                                 vectorized_check_handler, vectorized);
2042                 if (ret < 0) {
2043                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2044                                         VIRTIO_ARG_VECTORIZED);
2045                         goto exit;
2046                 }
2047         }
2048
2049 exit:
2050         rte_kvargs_free(kvlist);
2051         return ret;
2052 }
2053
2054 static uint8_t
2055 rx_offload_enabled(struct virtio_hw *hw)
2056 {
2057         return virtio_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2058                 virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2059                 virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2060 }
2061
2062 static uint8_t
2063 tx_offload_enabled(struct virtio_hw *hw)
2064 {
2065         return virtio_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2066                 virtio_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2067                 virtio_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2068 }
2069
2070 /*
2071  * Configure virtio device
2072  * It returns 0 on success.
2073  */
2074 static int
2075 virtio_dev_configure(struct rte_eth_dev *dev)
2076 {
2077         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2078         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2079         struct virtio_hw *hw = dev->data->dev_private;
2080         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2081                 hw->vtnet_hdr_size;
2082         uint64_t rx_offloads = rxmode->offloads;
2083         uint64_t tx_offloads = txmode->offloads;
2084         uint64_t req_features;
2085         int ret;
2086
2087         PMD_INIT_LOG(DEBUG, "configure");
2088         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2089
2090         if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2091                 PMD_DRV_LOG(ERR,
2092                         "Unsupported Rx multi queue mode %d",
2093                         rxmode->mq_mode);
2094                 return -EINVAL;
2095         }
2096
2097         if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2098                 PMD_DRV_LOG(ERR,
2099                         "Unsupported Tx multi queue mode %d",
2100                         txmode->mq_mode);
2101                 return -EINVAL;
2102         }
2103
2104         if (dev->data->dev_conf.intr_conf.rxq) {
2105                 ret = virtio_init_device(dev, hw->req_guest_features);
2106                 if (ret < 0)
2107                         return ret;
2108         }
2109
2110         if ((rx_offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) &&
2111             (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len))
2112                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2113
2114         if (rx_offloads & DEV_RX_OFFLOAD_JUMBO_FRAME)
2115                 hw->max_rx_pkt_len = rxmode->max_rx_pkt_len;
2116         else
2117                 hw->max_rx_pkt_len = ether_hdr_len + dev->data->mtu;
2118
2119         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2120                            DEV_RX_OFFLOAD_TCP_CKSUM))
2121                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2122
2123         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2124                 req_features |=
2125                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2126                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2127
2128         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2129                            DEV_TX_OFFLOAD_TCP_CKSUM))
2130                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2131
2132         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2133                 req_features |=
2134                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2135                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2136
2137         /* if request features changed, reinit the device */
2138         if (req_features != hw->req_guest_features) {
2139                 ret = virtio_init_device(dev, req_features);
2140                 if (ret < 0)
2141                         return ret;
2142         }
2143
2144         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2145                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2146                 !virtio_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2147                 PMD_DRV_LOG(ERR,
2148                         "rx checksum not available on this host");
2149                 return -ENOTSUP;
2150         }
2151
2152         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2153                 (!virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2154                  !virtio_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2155                 PMD_DRV_LOG(ERR,
2156                         "Large Receive Offload not available on this host");
2157                 return -ENOTSUP;
2158         }
2159
2160         /* start control queue */
2161         if (virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2162                 virtio_dev_cq_start(dev);
2163
2164         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2165                 hw->vlan_strip = 1;
2166
2167         hw->rx_ol_scatter = (rx_offloads & DEV_RX_OFFLOAD_SCATTER);
2168
2169         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2170                         !virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2171                 PMD_DRV_LOG(ERR,
2172                             "vlan filtering not available on this host");
2173                 return -ENOTSUP;
2174         }
2175
2176         hw->has_tx_offload = tx_offload_enabled(hw);
2177         hw->has_rx_offload = rx_offload_enabled(hw);
2178
2179         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2180                 /* Enable vector (0) for Link State Intrerrupt */
2181                 if (VIRTIO_OPS(hw)->set_config_irq(hw, 0) ==
2182                                 VIRTIO_MSI_NO_VECTOR) {
2183                         PMD_DRV_LOG(ERR, "failed to set config vector");
2184                         return -EBUSY;
2185                 }
2186
2187         if (virtio_with_packed_queue(hw)) {
2188 #if defined(RTE_ARCH_X86_64) && defined(CC_AVX512_SUPPORT)
2189                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2190                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
2191                      !virtio_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2192                      !virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
2193                      rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_512)) {
2194                         PMD_DRV_LOG(INFO,
2195                                 "disabled packed ring vectorized path for requirements not met");
2196                         hw->use_vec_rx = 0;
2197                         hw->use_vec_tx = 0;
2198                 }
2199 #elif defined(RTE_ARCH_ARM)
2200                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2201                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON) ||
2202                      !virtio_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2203                      !virtio_with_feature(hw, VIRTIO_F_VERSION_1) ||
2204                      rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_128)) {
2205                         PMD_DRV_LOG(INFO,
2206                                 "disabled packed ring vectorized path for requirements not met");
2207                         hw->use_vec_rx = 0;
2208                         hw->use_vec_tx = 0;
2209                 }
2210 #else
2211                 hw->use_vec_rx = 0;
2212                 hw->use_vec_tx = 0;
2213 #endif
2214
2215                 if (hw->use_vec_rx) {
2216                         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2217                                 PMD_DRV_LOG(INFO,
2218                                         "disabled packed ring vectorized rx for mrg_rxbuf enabled");
2219                                 hw->use_vec_rx = 0;
2220                         }
2221
2222                         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) {
2223                                 PMD_DRV_LOG(INFO,
2224                                         "disabled packed ring vectorized rx for TCP_LRO enabled");
2225                                 hw->use_vec_rx = 0;
2226                         }
2227                 }
2228         } else {
2229                 if (virtio_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2230                         hw->use_inorder_tx = 1;
2231                         hw->use_inorder_rx = 1;
2232                         hw->use_vec_rx = 0;
2233                 }
2234
2235                 if (hw->use_vec_rx) {
2236 #if defined RTE_ARCH_ARM
2237                         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2238                                 PMD_DRV_LOG(INFO,
2239                                         "disabled split ring vectorized path for requirement not met");
2240                                 hw->use_vec_rx = 0;
2241                         }
2242 #endif
2243                         if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2244                                 PMD_DRV_LOG(INFO,
2245                                         "disabled split ring vectorized rx for mrg_rxbuf enabled");
2246                                 hw->use_vec_rx = 0;
2247                         }
2248
2249                         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2250                                            DEV_RX_OFFLOAD_TCP_CKSUM |
2251                                            DEV_RX_OFFLOAD_TCP_LRO |
2252                                            DEV_RX_OFFLOAD_VLAN_STRIP)) {
2253                                 PMD_DRV_LOG(INFO,
2254                                         "disabled split ring vectorized rx for offloading enabled");
2255                                 hw->use_vec_rx = 0;
2256                         }
2257
2258                         if (rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_128) {
2259                                 PMD_DRV_LOG(INFO,
2260                                         "disabled split ring vectorized rx, max SIMD bitwidth too low");
2261                                 hw->use_vec_rx = 0;
2262                         }
2263                 }
2264         }
2265
2266         return 0;
2267 }
2268
2269
2270 static int
2271 virtio_dev_start(struct rte_eth_dev *dev)
2272 {
2273         uint16_t nb_queues, i;
2274         struct virtqueue *vq;
2275         struct virtio_hw *hw = dev->data->dev_private;
2276         int ret;
2277
2278         /* Finish the initialization of the queues */
2279         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2280                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2281                 if (ret < 0)
2282                         return ret;
2283         }
2284         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2285                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2286                 if (ret < 0)
2287                         return ret;
2288         }
2289
2290         /* check if lsc interrupt feature is enabled */
2291         if (dev->data->dev_conf.intr_conf.lsc) {
2292                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2293                         PMD_DRV_LOG(ERR, "link status not supported by host");
2294                         return -ENOTSUP;
2295                 }
2296         }
2297
2298         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2299          * in device configure, but it could be unmapped  when device is
2300          * stopped.
2301          */
2302         if (dev->data->dev_conf.intr_conf.lsc ||
2303             dev->data->dev_conf.intr_conf.rxq) {
2304                 virtio_intr_disable(dev);
2305
2306                 /* Setup interrupt callback  */
2307                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2308                         rte_intr_callback_register(dev->intr_handle,
2309                                                    virtio_interrupt_handler,
2310                                                    dev);
2311
2312                 if (virtio_intr_enable(dev) < 0) {
2313                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2314                         return -EIO;
2315                 }
2316         }
2317
2318         /*Notify the backend
2319          *Otherwise the tap backend might already stop its queue due to fullness.
2320          *vhost backend will have no chance to be waked up
2321          */
2322         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2323         if (hw->max_queue_pairs > 1) {
2324                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2325                         return -EINVAL;
2326         }
2327
2328         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2329
2330         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2331                 vq = virtnet_rxq_to_vq(dev->data->rx_queues[i]);
2332                 /* Flush the old packets */
2333                 virtqueue_rxvq_flush(vq);
2334                 virtqueue_notify(vq);
2335         }
2336
2337         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2338                 vq = virtnet_txq_to_vq(dev->data->tx_queues[i]);
2339                 virtqueue_notify(vq);
2340         }
2341
2342         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2343
2344         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2345                 vq = virtnet_rxq_to_vq(dev->data->rx_queues[i]);
2346                 VIRTQUEUE_DUMP(vq);
2347         }
2348
2349         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2350                 vq = virtnet_txq_to_vq(dev->data->tx_queues[i]);
2351                 VIRTQUEUE_DUMP(vq);
2352         }
2353
2354         set_rxtx_funcs(dev);
2355         hw->started = 1;
2356
2357         /* Initialize Link state */
2358         virtio_dev_link_update(dev, 0);
2359
2360         return 0;
2361 }
2362
2363 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2364 {
2365         struct virtio_hw *hw = dev->data->dev_private;
2366         uint16_t nr_vq = virtio_get_nr_vq(hw);
2367         const char *type __rte_unused;
2368         unsigned int i, mbuf_num = 0;
2369         struct virtqueue *vq;
2370         struct rte_mbuf *buf;
2371         int queue_type;
2372
2373         if (hw->vqs == NULL)
2374                 return;
2375
2376         for (i = 0; i < nr_vq; i++) {
2377                 vq = hw->vqs[i];
2378                 if (!vq)
2379                         continue;
2380
2381                 queue_type = virtio_get_queue_type(hw, i);
2382                 if (queue_type == VTNET_RQ)
2383                         type = "rxq";
2384                 else if (queue_type == VTNET_TQ)
2385                         type = "txq";
2386                 else
2387                         continue;
2388
2389                 PMD_INIT_LOG(DEBUG,
2390                         "Before freeing %s[%d] used and unused buf",
2391                         type, i);
2392                 VIRTQUEUE_DUMP(vq);
2393
2394                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2395                         rte_pktmbuf_free(buf);
2396                         mbuf_num++;
2397                 }
2398
2399                 PMD_INIT_LOG(DEBUG,
2400                         "After freeing %s[%d] used and unused buf",
2401                         type, i);
2402                 VIRTQUEUE_DUMP(vq);
2403         }
2404
2405         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2406 }
2407
2408 static void
2409 virtio_tx_completed_cleanup(struct rte_eth_dev *dev)
2410 {
2411         struct virtio_hw *hw = dev->data->dev_private;
2412         struct virtqueue *vq;
2413         int qidx;
2414         void (*xmit_cleanup)(struct virtqueue *vq, uint16_t nb_used);
2415
2416         if (virtio_with_packed_queue(hw)) {
2417                 if (hw->use_vec_tx)
2418                         xmit_cleanup = &virtio_xmit_cleanup_inorder_packed;
2419                 else if (virtio_with_feature(hw, VIRTIO_F_IN_ORDER))
2420                         xmit_cleanup = &virtio_xmit_cleanup_inorder_packed;
2421                 else
2422                         xmit_cleanup = &virtio_xmit_cleanup_normal_packed;
2423         } else {
2424                 if (hw->use_inorder_tx)
2425                         xmit_cleanup = &virtio_xmit_cleanup_inorder;
2426                 else
2427                         xmit_cleanup = &virtio_xmit_cleanup;
2428         }
2429
2430         for (qidx = 0; qidx < hw->max_queue_pairs; qidx++) {
2431                 vq = hw->vqs[2 * qidx + VTNET_SQ_TQ_QUEUE_IDX];
2432                 if (vq != NULL)
2433                         xmit_cleanup(vq, virtqueue_nused(vq));
2434         }
2435 }
2436
2437 /*
2438  * Stop device: disable interrupt and mark link down
2439  */
2440 int
2441 virtio_dev_stop(struct rte_eth_dev *dev)
2442 {
2443         struct virtio_hw *hw = dev->data->dev_private;
2444         struct rte_eth_link link;
2445         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2446
2447         PMD_INIT_LOG(DEBUG, "stop");
2448         dev->data->dev_started = 0;
2449
2450         rte_spinlock_lock(&hw->state_lock);
2451         if (!hw->started)
2452                 goto out_unlock;
2453         hw->started = 0;
2454
2455         virtio_tx_completed_cleanup(dev);
2456
2457         if (intr_conf->lsc || intr_conf->rxq) {
2458                 virtio_intr_disable(dev);
2459
2460                 /* Reset interrupt callback  */
2461                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2462                         rte_intr_callback_unregister(dev->intr_handle,
2463                                                      virtio_interrupt_handler,
2464                                                      dev);
2465                 }
2466         }
2467
2468         memset(&link, 0, sizeof(link));
2469         rte_eth_linkstatus_set(dev, &link);
2470 out_unlock:
2471         rte_spinlock_unlock(&hw->state_lock);
2472
2473         return 0;
2474 }
2475
2476 static int
2477 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2478 {
2479         struct rte_eth_link link;
2480         uint16_t status;
2481         struct virtio_hw *hw = dev->data->dev_private;
2482
2483         memset(&link, 0, sizeof(link));
2484         link.link_duplex = hw->duplex;
2485         link.link_speed  = hw->speed;
2486         link.link_autoneg = ETH_LINK_AUTONEG;
2487
2488         if (!hw->started) {
2489                 link.link_status = ETH_LINK_DOWN;
2490                 link.link_speed = ETH_SPEED_NUM_NONE;
2491         } else if (virtio_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2492                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2493                 virtio_read_dev_config(hw,
2494                                 offsetof(struct virtio_net_config, status),
2495                                 &status, sizeof(status));
2496                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2497                         link.link_status = ETH_LINK_DOWN;
2498                         link.link_speed = ETH_SPEED_NUM_NONE;
2499                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2500                                      dev->data->port_id);
2501                 } else {
2502                         link.link_status = ETH_LINK_UP;
2503                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2504                                      dev->data->port_id);
2505                 }
2506         } else {
2507                 link.link_status = ETH_LINK_UP;
2508         }
2509
2510         return rte_eth_linkstatus_set(dev, &link);
2511 }
2512
2513 static int
2514 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2515 {
2516         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2517         struct virtio_hw *hw = dev->data->dev_private;
2518         uint64_t offloads = rxmode->offloads;
2519
2520         if (mask & ETH_VLAN_FILTER_MASK) {
2521                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2522                                 !virtio_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2523
2524                         PMD_DRV_LOG(NOTICE,
2525                                 "vlan filtering not available on this host");
2526
2527                         return -ENOTSUP;
2528                 }
2529         }
2530
2531         if (mask & ETH_VLAN_STRIP_MASK)
2532                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2533
2534         return 0;
2535 }
2536
2537 static int
2538 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2539 {
2540         uint64_t tso_mask, host_features;
2541         struct virtio_hw *hw = dev->data->dev_private;
2542         dev_info->speed_capa = virtio_dev_speed_capa_get(hw->speed);
2543
2544         dev_info->max_rx_queues =
2545                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2546         dev_info->max_tx_queues =
2547                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2548         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2549         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2550         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2551         dev_info->max_mtu = hw->max_mtu;
2552
2553         host_features = VIRTIO_OPS(hw)->get_features(hw);
2554         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2555         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2556         if (host_features & (1ULL << VIRTIO_NET_F_MRG_RXBUF))
2557                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_SCATTER;
2558         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2559                 dev_info->rx_offload_capa |=
2560                         DEV_RX_OFFLOAD_TCP_CKSUM |
2561                         DEV_RX_OFFLOAD_UDP_CKSUM;
2562         }
2563         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2564                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2565         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2566                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2567         if ((host_features & tso_mask) == tso_mask)
2568                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2569
2570         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2571                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2572         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2573                 dev_info->tx_offload_capa |=
2574                         DEV_TX_OFFLOAD_UDP_CKSUM |
2575                         DEV_TX_OFFLOAD_TCP_CKSUM;
2576         }
2577         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2578                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2579         if ((host_features & tso_mask) == tso_mask)
2580                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2581
2582         if (host_features & (1ULL << VIRTIO_F_RING_PACKED)) {
2583                 /*
2584                  * According to 2.7 Packed Virtqueues,
2585                  * 2.7.10.1 Structure Size and Alignment:
2586                  * The Queue Size value does not have to be a power of 2.
2587                  */
2588                 dev_info->rx_desc_lim.nb_max = UINT16_MAX;
2589                 dev_info->tx_desc_lim.nb_max = UINT16_MAX;
2590         } else {
2591                 /*
2592                  * According to 2.6 Split Virtqueues:
2593                  * Queue Size value is always a power of 2. The maximum Queue
2594                  * Size value is 32768.
2595                  */
2596                 dev_info->rx_desc_lim.nb_max = 32768;
2597                 dev_info->tx_desc_lim.nb_max = 32768;
2598         }
2599         /*
2600          * Actual minimum is not the same for virtqueues of different kinds,
2601          * but to avoid tangling the code with separate branches, rely on
2602          * default thresholds since desc number must be at least of their size.
2603          */
2604         dev_info->rx_desc_lim.nb_min = RTE_MAX(DEFAULT_RX_FREE_THRESH,
2605                                                RTE_VIRTIO_VPMD_RX_REARM_THRESH);
2606         dev_info->tx_desc_lim.nb_min = DEFAULT_TX_FREE_THRESH;
2607         dev_info->rx_desc_lim.nb_align = 1;
2608         dev_info->tx_desc_lim.nb_align = 1;
2609
2610         return 0;
2611 }
2612
2613 /*
2614  * It enables testpmd to collect per queue stats.
2615  */
2616 static int
2617 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2618 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2619 __rte_unused uint8_t is_rx)
2620 {
2621         return 0;
2622 }
2623
2624 RTE_LOG_REGISTER_SUFFIX(virtio_logtype_init, init, NOTICE);
2625 RTE_LOG_REGISTER_SUFFIX(virtio_logtype_driver, driver, NOTICE);