drivers/net/virtio/virtio_ethdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <string.h>
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <unistd.h>
  10
  11 #include <rte_ethdev_driver.h>
  12 #include <rte_ethdev_pci.h>
  13 #include <rte_memcpy.h>
  14 #include <rte_string_fns.h>
  15 #include <rte_memzone.h>
  16 #include <rte_malloc.h>
  17 #include <rte_branch_prediction.h>
  18 #include <rte_pci.h>
  19 #include <rte_bus_pci.h>
  20 #include <rte_ether.h>
  21 #include <rte_ip.h>
  22 #include <rte_arp.h>
  23 #include <rte_common.h>
  24 #include <rte_errno.h>
  25 #include <rte_cpuflags.h>
  26
  27 #include <rte_memory.h>
  28 #include <rte_eal.h>
  29 #include <rte_dev.h>
  30 #include <rte_cycles.h>
  31 #include <rte_kvargs.h>
  32
  33 #include "virtio_ethdev.h"
  34 #include "virtio_pci.h"
  35 #include "virtio_logs.h"
  36 #include "virtqueue.h"
  37 #include "virtio_rxtx.h"
  38
  39 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  40 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  41 static int  virtio_dev_start(struct rte_eth_dev *dev);
  42 static void virtio_dev_stop(struct rte_eth_dev *dev);
  43 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  44 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  45 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  46 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  47 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  48                                 struct rte_eth_dev_info *dev_info);
  49 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  50         int wait_to_complete);
  51 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  52
  53 static void virtio_set_hwaddr(struct virtio_hw *hw);
  54 static void virtio_get_hwaddr(struct virtio_hw *hw);
  55
  56 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  57                                  struct rte_eth_stats *stats);
  58 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  59                                  struct rte_eth_xstat *xstats, unsigned n);
  60 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  61                                        struct rte_eth_xstat_name *xstats_names,
  62                                        unsigned limit);
  63 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  64 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  65 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  66                                 uint16_t vlan_id, int on);
  67 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  68                                 struct ether_addr *mac_addr,
  69                                 uint32_t index, uint32_t vmdq);
  70 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  71 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
  72                                 struct ether_addr *mac_addr);
  73
  74 static int virtio_intr_disable(struct rte_eth_dev *dev);
  75
  76 static int virtio_dev_queue_stats_mapping_set(
  77         struct rte_eth_dev *eth_dev,
  78         uint16_t queue_id,
  79         uint8_t stat_idx,
  80         uint8_t is_rx);
  81
  82 int virtio_logtype_init;
  83 int virtio_logtype_driver;
  84
  85 static void virtio_notify_peers(struct rte_eth_dev *dev);
  86 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  87
  88 /*
  89  * The set of PCI devices this driver supports
  90  */
  91 static const struct rte_pci_id pci_id_virtio_map[] = {
  92         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  93         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  94         { .vendor_id = 0, /* sentinel */ },
  95 };
  96
  97 struct rte_virtio_xstats_name_off {
  98         char name[RTE_ETH_XSTATS_NAME_SIZE];
  99         unsigned offset;
 100 };
 101
 102 /* [rt]x_qX_ is prepended to the name string here */
 103 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 104         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 105         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 106         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 107         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 108         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 109         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 110         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 111         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 112         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 113         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 114         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 115         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 116         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 117 };
 118
 119 /* [rt]x_qX_ is prepended to the name string here */
 120 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 121         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 122         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 123         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 124         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 125         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 126         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 127         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 128         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 129         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 130         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 131         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 132         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 133         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 134 };
 135
 136 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 137                             sizeof(rte_virtio_rxq_stat_strings[0]))
 138 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 139                             sizeof(rte_virtio_txq_stat_strings[0]))
 140
 141 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 142
 143 static struct virtio_pmd_ctrl *
 144 virtio_send_command_packed(struct virtnet_ctl *cvq,
 145                            struct virtio_pmd_ctrl *ctrl,
 146                            int *dlen, int pkt_num)
 147 {
 148         struct virtqueue *vq = cvq->vq;
 149         int head;
 150         struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
 151         struct virtio_pmd_ctrl *result;
 152         uint16_t flags;
 153         int sum = 0;
 154         int nb_descs = 0;
 155         int k;
 156
 157         /*
 158          * Format is enforced in qemu code:
 159          * One TX packet for header;
 160          * At least one TX packet per argument;
 161          * One RX packet for ACK.
 162          */
 163         head = vq->vq_avail_idx;
 164         flags = vq->vq_packed.cached_flags;
 165         desc[head].addr = cvq->virtio_net_hdr_mem;
 166         desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 167         vq->vq_free_cnt--;
 168         nb_descs++;
 169         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 170                 vq->vq_avail_idx -= vq->vq_nentries;
 171                 vq->vq_packed.cached_flags ^=
 172                         VRING_DESC_F_AVAIL(1) | VRING_DESC_F_USED(1);
 173         }
 174
 175         for (k = 0; k < pkt_num; k++) {
 176                 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 177                         + sizeof(struct virtio_net_ctrl_hdr)
 178                         + sizeof(ctrl->status) + sizeof(uint8_t) * sum;
 179                 desc[vq->vq_avail_idx].len = dlen[k];
 180                 desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
 181                         vq->vq_packed.cached_flags;
 182                 sum += dlen[k];
 183                 vq->vq_free_cnt--;
 184                 nb_descs++;
 185                 if (++vq->vq_avail_idx >= vq->vq_nentries) {
 186                         vq->vq_avail_idx -= vq->vq_nentries;
 187                         vq->vq_packed.cached_flags ^=
 188                                 VRING_DESC_F_AVAIL(1) | VRING_DESC_F_USED(1);
 189                 }
 190         }
 191
 192         desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 193                 + sizeof(struct virtio_net_ctrl_hdr);
 194         desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
 195         desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
 196                 vq->vq_packed.cached_flags;
 197         vq->vq_free_cnt--;
 198         nb_descs++;
 199         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 200                 vq->vq_avail_idx -= vq->vq_nentries;
 201                 vq->vq_packed.cached_flags ^=
 202                         VRING_DESC_F_AVAIL(1) | VRING_DESC_F_USED(1);
 203         }
 204
 205         virtio_wmb(vq->hw->weak_barriers);
 206         desc[head].flags = VRING_DESC_F_NEXT | flags;
 207
 208         virtio_wmb(vq->hw->weak_barriers);
 209         virtqueue_notify(vq);
 210
 211         /* wait for used descriptors in virtqueue */
 212         while (!desc_is_used(&desc[head], vq))
 213                 usleep(100);
 214
 215         virtio_rmb(vq->hw->weak_barriers);
 216
 217         /* now get used descriptors */
 218         vq->vq_free_cnt += nb_descs;
 219         vq->vq_used_cons_idx += nb_descs;
 220         if (vq->vq_used_cons_idx >= vq->vq_nentries) {
 221                 vq->vq_used_cons_idx -= vq->vq_nentries;
 222                 vq->vq_packed.used_wrap_counter ^= 1;
 223         }
 224
 225         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
 226                         "vq->vq_avail_idx=%d\n"
 227                         "vq->vq_used_cons_idx=%d\n"
 228                         "vq->vq_packed.cached_flags=0x%x\n"
 229                         "vq->vq_packed.used_wrap_counter=%d\n",
 230                         vq->vq_free_cnt,
 231                         vq->vq_avail_idx,
 232                         vq->vq_used_cons_idx,
 233                         vq->vq_packed.cached_flags,
 234                         vq->vq_packed.used_wrap_counter);
 235
 236         result = cvq->virtio_net_hdr_mz->addr;
 237         return result;
 238 }
 239
 240 static struct virtio_pmd_ctrl *
 241 virtio_send_command_split(struct virtnet_ctl *cvq,
 242                           struct virtio_pmd_ctrl *ctrl,
 243                           int *dlen, int pkt_num)
 244 {
 245         struct virtio_pmd_ctrl *result;
 246         struct virtqueue *vq = cvq->vq;
 247         uint32_t head, i;
 248         int k, sum = 0;
 249
 250         head = vq->vq_desc_head_idx;
 251
 252         /*
 253          * Format is enforced in qemu code:
 254          * One TX packet for header;
 255          * At least one TX packet per argument;
 256          * One RX packet for ACK.
 257          */
 258         vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
 259         vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 260         vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 261         vq->vq_free_cnt--;
 262         i = vq->vq_split.ring.desc[head].next;
 263
 264         for (k = 0; k < pkt_num; k++) {
 265                 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
 266                 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 267                         + sizeof(struct virtio_net_ctrl_hdr)
 268                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 269                 vq->vq_split.ring.desc[i].len = dlen[k];
 270                 sum += dlen[k];
 271                 vq->vq_free_cnt--;
 272                 i = vq->vq_split.ring.desc[i].next;
 273         }
 274
 275         vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
 276         vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 277                         + sizeof(struct virtio_net_ctrl_hdr);
 278         vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
 279         vq->vq_free_cnt--;
 280
 281         vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
 282
 283         vq_update_avail_ring(vq, head);
 284         vq_update_avail_idx(vq);
 285
 286         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 287
 288         virtqueue_notify(vq);
 289
 290         rte_rmb();
 291         while (VIRTQUEUE_NUSED(vq) == 0) {
 292                 rte_rmb();
 293                 usleep(100);
 294         }
 295
 296         while (VIRTQUEUE_NUSED(vq)) {
 297                 uint32_t idx, desc_idx, used_idx;
 298                 struct vring_used_elem *uep;
 299
 300                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 301                                 & (vq->vq_nentries - 1));
 302                 uep = &vq->vq_split.ring.used->ring[used_idx];
 303                 idx = (uint32_t) uep->id;
 304                 desc_idx = idx;
 305
 306                 while (vq->vq_split.ring.desc[desc_idx].flags &
 307                                 VRING_DESC_F_NEXT) {
 308                         desc_idx = vq->vq_split.ring.desc[desc_idx].next;
 309                         vq->vq_free_cnt++;
 310                 }
 311
 312                 vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 313                 vq->vq_desc_head_idx = idx;
 314
 315                 vq->vq_used_cons_idx++;
 316                 vq->vq_free_cnt++;
 317         }
 318
 319         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 320                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 321
 322         result = cvq->virtio_net_hdr_mz->addr;
 323         return result;
 324 }
 325
 326 static int
 327 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 328                     int *dlen, int pkt_num)
 329 {
 330         virtio_net_ctrl_ack status = ~0;
 331         struct virtio_pmd_ctrl *result;
 332         struct virtqueue *vq;
 333
 334         ctrl->status = status;
 335
 336         if (!cvq || !cvq->vq) {
 337                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 338                 return -1;
 339         }
 340
 341         rte_spinlock_lock(&cvq->lock);
 342         vq = cvq->vq;
 343
 344         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 345                 "vq->hw->cvq = %p vq = %p",
 346                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 347
 348         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 349                 rte_spinlock_unlock(&cvq->lock);
 350                 return -1;
 351         }
 352
 353         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 354                 sizeof(struct virtio_pmd_ctrl));
 355
 356         if (vtpci_packed_queue(vq->hw))
 357                 result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
 358         else
 359                 result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
 360
 361         rte_spinlock_unlock(&cvq->lock);
 362         return result->status;
 363 }
 364
 365 static int
 366 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 367 {
 368         struct virtio_hw *hw = dev->data->dev_private;
 369         struct virtio_pmd_ctrl ctrl;
 370         int dlen[1];
 371         int ret;
 372
 373         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 374         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 375         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 376
 377         dlen[0] = sizeof(uint16_t);
 378
 379         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 380         if (ret) {
 381                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 382                           "failed, this is too late now...");
 383                 return -EINVAL;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static void
 390 virtio_dev_queue_release(void *queue __rte_unused)
 391 {
 392         /* do nothing */
 393 }
 394
 395 static uint16_t
 396 virtio_get_nr_vq(struct virtio_hw *hw)
 397 {
 398         uint16_t nr_vq = hw->max_queue_pairs * 2;
 399
 400         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 401                 nr_vq += 1;
 402
 403         return nr_vq;
 404 }
 405
 406 static void
 407 virtio_init_vring(struct virtqueue *vq)
 408 {
 409         int size = vq->vq_nentries;
 410         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 411
 412         PMD_INIT_FUNC_TRACE();
 413
 414         memset(ring_mem, 0, vq->vq_ring_size);
 415
 416         vq->vq_used_cons_idx = 0;
 417         vq->vq_desc_head_idx = 0;
 418         vq->vq_avail_idx = 0;
 419         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 420         vq->vq_free_cnt = vq->vq_nentries;
 421         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 422         if (vtpci_packed_queue(vq->hw)) {
 423                 vring_init_packed(&vq->vq_packed.ring, ring_mem,
 424                                   VIRTIO_PCI_VRING_ALIGN, size);
 425                 vring_desc_init_packed(vq, size);
 426         } else {
 427                 struct vring *vr = &vq->vq_split.ring;
 428
 429                 vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size);
 430                 vring_desc_init_split(vr->desc, size);
 431         }
 432         /*
 433          * Disable device(host) interrupting guest
 434          */
 435         virtqueue_disable_intr(vq);
 436 }
 437
 438 static int
 439 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 440 {
 441         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 442         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 443         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 444         unsigned int vq_size, size;
 445         struct virtio_hw *hw = dev->data->dev_private;
 446         struct virtnet_rx *rxvq = NULL;
 447         struct virtnet_tx *txvq = NULL;
 448         struct virtnet_ctl *cvq = NULL;
 449         struct virtqueue *vq;
 450         size_t sz_hdr_mz = 0;
 451         void *sw_ring = NULL;
 452         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 453         int ret;
 454         int numa_node = dev->device->numa_node;
 455
 456         PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
 457                         vtpci_queue_idx, numa_node);
 458
 459         /*
 460          * Read the virtqueue size from the Queue Size field
 461          * Always power of 2 and if 0 virtqueue does not exist
 462          */
 463         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 464         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 465         if (vq_size == 0) {
 466                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 467                 return -EINVAL;
 468         }
 469
 470         if (!rte_is_power_of_2(vq_size)) {
 471                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 472                 return -EINVAL;
 473         }
 474
 475         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 476                  dev->data->port_id, vtpci_queue_idx);
 477
 478         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 479                                 vq_size * sizeof(struct vq_desc_extra),
 480                                 RTE_CACHE_LINE_SIZE);
 481         if (queue_type == VTNET_TQ) {
 482                 /*
 483                  * For each xmit packet, allocate a virtio_net_hdr
 484                  * and indirect ring elements
 485                  */
 486                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 487         } else if (queue_type == VTNET_CQ) {
 488                 /* Allocate a page for control vq command, data and status */
 489                 sz_hdr_mz = PAGE_SIZE;
 490         }
 491
 492         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 493                                 numa_node);
 494         if (vq == NULL) {
 495                 PMD_INIT_LOG(ERR, "can not allocate vq");
 496                 return -ENOMEM;
 497         }
 498         hw->vqs[vtpci_queue_idx] = vq;
 499
 500         vq->hw = hw;
 501         vq->vq_queue_index = vtpci_queue_idx;
 502         vq->vq_nentries = vq_size;
 503         if (vtpci_packed_queue(hw)) {
 504                 vq->vq_packed.used_wrap_counter = 1;
 505                 vq->vq_packed.cached_flags = VRING_DESC_F_AVAIL(1);
 506                 vq->vq_packed.event_flags_shadow = 0;
 507                 if (queue_type == VTNET_RQ)
 508                         vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
 509         }
 510
 511         /*
 512          * Reserve a memzone for vring elements
 513          */
 514         size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN);
 515         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 516         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 517                      size, vq->vq_ring_size);
 518
 519         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 520                         numa_node, RTE_MEMZONE_IOVA_CONTIG,
 521                         VIRTIO_PCI_VRING_ALIGN);
 522         if (mz == NULL) {
 523                 if (rte_errno == EEXIST)
 524                         mz = rte_memzone_lookup(vq_name);
 525                 if (mz == NULL) {
 526                         ret = -ENOMEM;
 527                         goto fail_q_alloc;
 528                 }
 529         }
 530
 531         memset(mz->addr, 0, mz->len);
 532
 533         vq->vq_ring_mem = mz->iova;
 534         vq->vq_ring_virt_mem = mz->addr;
 535         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 536                      (uint64_t)mz->iova);
 537         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 538                      (uint64_t)(uintptr_t)mz->addr);
 539
 540         virtio_init_vring(vq);
 541
 542         if (sz_hdr_mz) {
 543                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 544                          dev->data->port_id, vtpci_queue_idx);
 545                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 546                                 numa_node, RTE_MEMZONE_IOVA_CONTIG,
 547                                 RTE_CACHE_LINE_SIZE);
 548                 if (hdr_mz == NULL) {
 549                         if (rte_errno == EEXIST)
 550                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 551                         if (hdr_mz == NULL) {
 552                                 ret = -ENOMEM;
 553                                 goto fail_q_alloc;
 554                         }
 555                 }
 556         }
 557
 558         if (queue_type == VTNET_RQ) {
 559                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 560                                sizeof(vq->sw_ring[0]);
 561
 562                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 563                                 RTE_CACHE_LINE_SIZE, numa_node);
 564                 if (!sw_ring) {
 565                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 566                         ret = -ENOMEM;
 567                         goto fail_q_alloc;
 568                 }
 569
 570                 vq->sw_ring = sw_ring;
 571                 rxvq = &vq->rxq;
 572                 rxvq->vq = vq;
 573                 rxvq->port_id = dev->data->port_id;
 574                 rxvq->mz = mz;
 575         } else if (queue_type == VTNET_TQ) {
 576                 txvq = &vq->txq;
 577                 txvq->vq = vq;
 578                 txvq->port_id = dev->data->port_id;
 579                 txvq->mz = mz;
 580                 txvq->virtio_net_hdr_mz = hdr_mz;
 581                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 582         } else if (queue_type == VTNET_CQ) {
 583                 cvq = &vq->cq;
 584                 cvq->vq = vq;
 585                 cvq->mz = mz;
 586                 cvq->virtio_net_hdr_mz = hdr_mz;
 587                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 588                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 589
 590                 hw->cvq = cvq;
 591         }
 592
 593         /* For virtio_user case (that is when hw->dev is NULL), we use
 594          * virtual address. And we need properly set _offset_, please see
 595          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 596          */
 597         if (!hw->virtio_user_dev)
 598                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 599         else {
 600                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 601                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 602                 if (queue_type == VTNET_TQ)
 603                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 604                 else if (queue_type == VTNET_CQ)
 605                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 606         }
 607
 608         if (queue_type == VTNET_TQ) {
 609                 struct virtio_tx_region *txr;
 610                 unsigned int i;
 611
 612                 txr = hdr_mz->addr;
 613                 memset(txr, 0, vq_size * sizeof(*txr));
 614                 for (i = 0; i < vq_size; i++) {
 615                         struct vring_desc *start_dp = txr[i].tx_indir;
 616
 617                         /* first indirect descriptor is always the tx header */
 618                         if (!vtpci_packed_queue(hw)) {
 619                                 vring_desc_init_split(start_dp,
 620                                                       RTE_DIM(txr[i].tx_indir));
 621                                 start_dp->addr = txvq->virtio_net_hdr_mem
 622                                         + i * sizeof(*txr)
 623                                         + offsetof(struct virtio_tx_region,
 624                                                    tx_hdr);
 625                                 start_dp->len = hw->vtnet_hdr_size;
 626                                 start_dp->flags = VRING_DESC_F_NEXT;
 627                         }
 628                 }
 629         }
 630
 631         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 632                 PMD_INIT_LOG(ERR, "setup_queue failed");
 633                 return -EINVAL;
 634         }
 635
 636         return 0;
 637
 638 fail_q_alloc:
 639         rte_free(sw_ring);
 640         rte_memzone_free(hdr_mz);
 641         rte_memzone_free(mz);
 642         rte_free(vq);
 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->sw_ring);
 666                         rte_memzone_free(vq->rxq.mz);
 667                 } else if (queue_type == VTNET_TQ) {
 668                         rte_memzone_free(vq->txq.mz);
 669                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 670                 } else {
 671                         rte_memzone_free(vq->cq.mz);
 672                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 673                 }
 674
 675                 rte_free(vq);
 676                 hw->vqs[i] = NULL;
 677         }
 678
 679         rte_free(hw->vqs);
 680         hw->vqs = NULL;
 681 }
 682
 683 static int
 684 virtio_alloc_queues(struct rte_eth_dev *dev)
 685 {
 686         struct virtio_hw *hw = dev->data->dev_private;
 687         uint16_t nr_vq = virtio_get_nr_vq(hw);
 688         uint16_t i;
 689         int ret;
 690
 691         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 692         if (!hw->vqs) {
 693                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 694                 return -ENOMEM;
 695         }
 696
 697         for (i = 0; i < nr_vq; i++) {
 698                 ret = virtio_init_queue(dev, i);
 699                 if (ret < 0) {
 700                         virtio_free_queues(hw);
 701                         return ret;
 702                 }
 703         }
 704
 705         return 0;
 706 }
 707
 708 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 709
 710 static void
 711 virtio_dev_close(struct rte_eth_dev *dev)
 712 {
 713         struct virtio_hw *hw = dev->data->dev_private;
 714         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 715
 716         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 717
 718         if (!hw->opened)
 719                 return;
 720         hw->opened = false;
 721
 722         /* reset the NIC */
 723         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 724                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 725         if (intr_conf->rxq)
 726                 virtio_queues_unbind_intr(dev);
 727
 728         if (intr_conf->lsc || intr_conf->rxq) {
 729                 virtio_intr_disable(dev);
 730                 rte_intr_efd_disable(dev->intr_handle);
 731                 rte_free(dev->intr_handle->intr_vec);
 732                 dev->intr_handle->intr_vec = NULL;
 733         }
 734
 735         vtpci_reset(hw);
 736         virtio_dev_free_mbufs(dev);
 737         virtio_free_queues(hw);
 738 }
 739
 740 static void
 741 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 742 {
 743         struct virtio_hw *hw = dev->data->dev_private;
 744         struct virtio_pmd_ctrl ctrl;
 745         int dlen[1];
 746         int ret;
 747
 748         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 749                 PMD_INIT_LOG(INFO, "host does not support rx control");
 750                 return;
 751         }
 752
 753         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 754         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 755         ctrl.data[0] = 1;
 756         dlen[0] = 1;
 757
 758         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 759         if (ret)
 760                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 761 }
 762
 763 static void
 764 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 765 {
 766         struct virtio_hw *hw = dev->data->dev_private;
 767         struct virtio_pmd_ctrl ctrl;
 768         int dlen[1];
 769         int ret;
 770
 771         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 772                 PMD_INIT_LOG(INFO, "host does not support rx control");
 773                 return;
 774         }
 775
 776         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 777         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 778         ctrl.data[0] = 0;
 779         dlen[0] = 1;
 780
 781         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 782         if (ret)
 783                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 784 }
 785
 786 static void
 787 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 788 {
 789         struct virtio_hw *hw = dev->data->dev_private;
 790         struct virtio_pmd_ctrl ctrl;
 791         int dlen[1];
 792         int ret;
 793
 794         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 795                 PMD_INIT_LOG(INFO, "host does not support rx control");
 796                 return;
 797         }
 798
 799         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 800         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 801         ctrl.data[0] = 1;
 802         dlen[0] = 1;
 803
 804         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 805         if (ret)
 806                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 807 }
 808
 809 static void
 810 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 811 {
 812         struct virtio_hw *hw = dev->data->dev_private;
 813         struct virtio_pmd_ctrl ctrl;
 814         int dlen[1];
 815         int ret;
 816
 817         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 818                 PMD_INIT_LOG(INFO, "host does not support rx control");
 819                 return;
 820         }
 821
 822         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 823         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 824         ctrl.data[0] = 0;
 825         dlen[0] = 1;
 826
 827         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 828         if (ret)
 829                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 830 }
 831
 832 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 833 static int
 834 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 835 {
 836         struct virtio_hw *hw = dev->data->dev_private;
 837         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 838                                  hw->vtnet_hdr_size;
 839         uint32_t frame_size = mtu + ether_hdr_len;
 840         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 841
 842         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 843
 844         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 845                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 846                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 847                 return -EINVAL;
 848         }
 849         return 0;
 850 }
 851
 852 static int
 853 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 854 {
 855         struct virtio_hw *hw = dev->data->dev_private;
 856         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 857         struct virtqueue *vq = rxvq->vq;
 858
 859         virtqueue_enable_intr(vq);
 860         virtio_mb(hw->weak_barriers);
 861         return 0;
 862 }
 863
 864 static int
 865 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 866 {
 867         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 868         struct virtqueue *vq = rxvq->vq;
 869
 870         virtqueue_disable_intr(vq);
 871         return 0;
 872 }
 873
 874 /*
 875  * dev_ops for virtio, bare necessities for basic operation
 876  */
 877 static const struct eth_dev_ops virtio_eth_dev_ops = {
 878         .dev_configure           = virtio_dev_configure,
 879         .dev_start               = virtio_dev_start,
 880         .dev_stop                = virtio_dev_stop,
 881         .dev_close               = virtio_dev_close,
 882         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 883         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 884         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 885         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 886         .mtu_set                 = virtio_mtu_set,
 887         .dev_infos_get           = virtio_dev_info_get,
 888         .stats_get               = virtio_dev_stats_get,
 889         .xstats_get              = virtio_dev_xstats_get,
 890         .xstats_get_names        = virtio_dev_xstats_get_names,
 891         .stats_reset             = virtio_dev_stats_reset,
 892         .xstats_reset            = virtio_dev_stats_reset,
 893         .link_update             = virtio_dev_link_update,
 894         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 895         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 896         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 897         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 898         .rx_queue_release        = virtio_dev_queue_release,
 899         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 900         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 901         .tx_queue_release        = virtio_dev_queue_release,
 902         /* collect stats per queue */
 903         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 904         .vlan_filter_set         = virtio_vlan_filter_set,
 905         .mac_addr_add            = virtio_mac_addr_add,
 906         .mac_addr_remove         = virtio_mac_addr_remove,
 907         .mac_addr_set            = virtio_mac_addr_set,
 908 };
 909
 910 static void
 911 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 912 {
 913         unsigned i;
 914
 915         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 916                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 917                 if (txvq == NULL)
 918                         continue;
 919
 920                 stats->opackets += txvq->stats.packets;
 921                 stats->obytes += txvq->stats.bytes;
 922                 stats->oerrors += txvq->stats.errors;
 923
 924                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 925                         stats->q_opackets[i] = txvq->stats.packets;
 926                         stats->q_obytes[i] = txvq->stats.bytes;
 927                 }
 928         }
 929
 930         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 931                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 932                 if (rxvq == NULL)
 933                         continue;
 934
 935                 stats->ipackets += rxvq->stats.packets;
 936                 stats->ibytes += rxvq->stats.bytes;
 937                 stats->ierrors += rxvq->stats.errors;
 938
 939                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 940                         stats->q_ipackets[i] = rxvq->stats.packets;
 941                         stats->q_ibytes[i] = rxvq->stats.bytes;
 942                 }
 943         }
 944
 945         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 946 }
 947
 948 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 949                                        struct rte_eth_xstat_name *xstats_names,
 950                                        __rte_unused unsigned limit)
 951 {
 952         unsigned i;
 953         unsigned count = 0;
 954         unsigned t;
 955
 956         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 957                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 958
 959         if (xstats_names != NULL) {
 960                 /* Note: limit checked in rte_eth_xstats_names() */
 961
 962                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 963                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 964                         if (rxvq == NULL)
 965                                 continue;
 966                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 967                                 snprintf(xstats_names[count].name,
 968                                         sizeof(xstats_names[count].name),
 969                                         "rx_q%u_%s", i,
 970                                         rte_virtio_rxq_stat_strings[t].name);
 971                                 count++;
 972                         }
 973                 }
 974
 975                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 976                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
 977                         if (txvq == NULL)
 978                                 continue;
 979                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 980                                 snprintf(xstats_names[count].name,
 981                                         sizeof(xstats_names[count].name),
 982                                         "tx_q%u_%s", i,
 983                                         rte_virtio_txq_stat_strings[t].name);
 984                                 count++;
 985                         }
 986                 }
 987                 return count;
 988         }
 989         return nstats;
 990 }
 991
 992 static int
 993 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 994                       unsigned n)
 995 {
 996         unsigned i;
 997         unsigned count = 0;
 998
 999         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1000                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1001
1002         if (n < nstats)
1003                 return nstats;
1004
1005         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1006                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1007
1008                 if (rxvq == NULL)
1009                         continue;
1010
1011                 unsigned t;
1012
1013                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1014                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1015                                 rte_virtio_rxq_stat_strings[t].offset);
1016                         xstats[count].id = count;
1017                         count++;
1018                 }
1019         }
1020
1021         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1022                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1023
1024                 if (txvq == NULL)
1025                         continue;
1026
1027                 unsigned t;
1028
1029                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1030                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1031                                 rte_virtio_txq_stat_strings[t].offset);
1032                         xstats[count].id = count;
1033                         count++;
1034                 }
1035         }
1036
1037         return count;
1038 }
1039
1040 static int
1041 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1042 {
1043         virtio_update_stats(dev, stats);
1044
1045         return 0;
1046 }
1047
1048 static void
1049 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1050 {
1051         unsigned int i;
1052
1053         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1054                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1055                 if (txvq == NULL)
1056                         continue;
1057
1058                 txvq->stats.packets = 0;
1059                 txvq->stats.bytes = 0;
1060                 txvq->stats.errors = 0;
1061                 txvq->stats.multicast = 0;
1062                 txvq->stats.broadcast = 0;
1063                 memset(txvq->stats.size_bins, 0,
1064                        sizeof(txvq->stats.size_bins[0]) * 8);
1065         }
1066
1067         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1068                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1069                 if (rxvq == NULL)
1070                         continue;
1071
1072                 rxvq->stats.packets = 0;
1073                 rxvq->stats.bytes = 0;
1074                 rxvq->stats.errors = 0;
1075                 rxvq->stats.multicast = 0;
1076                 rxvq->stats.broadcast = 0;
1077                 memset(rxvq->stats.size_bins, 0,
1078                        sizeof(rxvq->stats.size_bins[0]) * 8);
1079         }
1080 }
1081
1082 static void
1083 virtio_set_hwaddr(struct virtio_hw *hw)
1084 {
1085         vtpci_write_dev_config(hw,
1086                         offsetof(struct virtio_net_config, mac),
1087                         &hw->mac_addr, ETHER_ADDR_LEN);
1088 }
1089
1090 static void
1091 virtio_get_hwaddr(struct virtio_hw *hw)
1092 {
1093         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1094                 vtpci_read_dev_config(hw,
1095                         offsetof(struct virtio_net_config, mac),
1096                         &hw->mac_addr, ETHER_ADDR_LEN);
1097         } else {
1098                 eth_random_addr(&hw->mac_addr[0]);
1099                 virtio_set_hwaddr(hw);
1100         }
1101 }
1102
1103 static int
1104 virtio_mac_table_set(struct virtio_hw *hw,
1105                      const struct virtio_net_ctrl_mac *uc,
1106                      const struct virtio_net_ctrl_mac *mc)
1107 {
1108         struct virtio_pmd_ctrl ctrl;
1109         int err, len[2];
1110
1111         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1112                 PMD_DRV_LOG(INFO, "host does not support mac table");
1113                 return -1;
1114         }
1115
1116         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1117         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1118
1119         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1120         memcpy(ctrl.data, uc, len[0]);
1121
1122         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1123         memcpy(ctrl.data + len[0], mc, len[1]);
1124
1125         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1126         if (err != 0)
1127                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1128         return err;
1129 }
1130
1131 static int
1132 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1133                     uint32_t index, uint32_t vmdq __rte_unused)
1134 {
1135         struct virtio_hw *hw = dev->data->dev_private;
1136         const struct ether_addr *addrs = dev->data->mac_addrs;
1137         unsigned int i;
1138         struct virtio_net_ctrl_mac *uc, *mc;
1139
1140         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1141                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1142                 return -EINVAL;
1143         }
1144
1145         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1146         uc->entries = 0;
1147         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1148         mc->entries = 0;
1149
1150         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1151                 const struct ether_addr *addr
1152                         = (i == index) ? mac_addr : addrs + i;
1153                 struct virtio_net_ctrl_mac *tbl
1154                         = is_multicast_ether_addr(addr) ? mc : uc;
1155
1156                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1157         }
1158
1159         return virtio_mac_table_set(hw, uc, mc);
1160 }
1161
1162 static void
1163 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1164 {
1165         struct virtio_hw *hw = dev->data->dev_private;
1166         struct ether_addr *addrs = dev->data->mac_addrs;
1167         struct virtio_net_ctrl_mac *uc, *mc;
1168         unsigned int i;
1169
1170         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1171                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1172                 return;
1173         }
1174
1175         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1176         uc->entries = 0;
1177         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1178         mc->entries = 0;
1179
1180         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1181                 struct virtio_net_ctrl_mac *tbl;
1182
1183                 if (i == index || is_zero_ether_addr(addrs + i))
1184                         continue;
1185
1186                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1187                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1188         }
1189
1190         virtio_mac_table_set(hw, uc, mc);
1191 }
1192
1193 static int
1194 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1195 {
1196         struct virtio_hw *hw = dev->data->dev_private;
1197
1198         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1199
1200         /* Use atomic update if available */
1201         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1202                 struct virtio_pmd_ctrl ctrl;
1203                 int len = ETHER_ADDR_LEN;
1204
1205                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1206                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1207
1208                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1209                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1210         }
1211
1212         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1213                 return -ENOTSUP;
1214
1215         virtio_set_hwaddr(hw);
1216         return 0;
1217 }
1218
1219 static int
1220 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1221 {
1222         struct virtio_hw *hw = dev->data->dev_private;
1223         struct virtio_pmd_ctrl ctrl;
1224         int len;
1225
1226         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1227                 return -ENOTSUP;
1228
1229         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1230         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1231         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1232         len = sizeof(vlan_id);
1233
1234         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1235 }
1236
1237 static int
1238 virtio_intr_enable(struct rte_eth_dev *dev)
1239 {
1240         struct virtio_hw *hw = dev->data->dev_private;
1241
1242         if (rte_intr_enable(dev->intr_handle) < 0)
1243                 return -1;
1244
1245         if (!hw->virtio_user_dev)
1246                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1247
1248         return 0;
1249 }
1250
1251 static int
1252 virtio_intr_disable(struct rte_eth_dev *dev)
1253 {
1254         struct virtio_hw *hw = dev->data->dev_private;
1255
1256         if (rte_intr_disable(dev->intr_handle) < 0)
1257                 return -1;
1258
1259         if (!hw->virtio_user_dev)
1260                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1261
1262         return 0;
1263 }
1264
1265 static int
1266 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1267 {
1268         uint64_t host_features;
1269
1270         /* Prepare guest_features: feature that driver wants to support */
1271         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1272                 req_features);
1273
1274         /* Read device(host) feature bits */
1275         host_features = VTPCI_OPS(hw)->get_features(hw);
1276         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1277                 host_features);
1278
1279         /* If supported, ensure MTU value is valid before acknowledging it. */
1280         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1281                 struct virtio_net_config config;
1282
1283                 vtpci_read_dev_config(hw,
1284                         offsetof(struct virtio_net_config, mtu),
1285                         &config.mtu, sizeof(config.mtu));
1286
1287                 if (config.mtu < ETHER_MIN_MTU)
1288                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1289         }
1290
1291         /*
1292          * Negotiate features: Subset of device feature bits are written back
1293          * guest feature bits.
1294          */
1295         hw->guest_features = req_features;
1296         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1297         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1298                 hw->guest_features);
1299
1300         if (hw->modern) {
1301                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1302                         PMD_INIT_LOG(ERR,
1303                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1304                         return -1;
1305                 }
1306                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1307                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1308                         PMD_INIT_LOG(ERR,
1309                                 "failed to set FEATURES_OK status!");
1310                         return -1;
1311                 }
1312         }
1313
1314         hw->req_guest_features = req_features;
1315
1316         return 0;
1317 }
1318
1319 int
1320 virtio_dev_pause(struct rte_eth_dev *dev)
1321 {
1322         struct virtio_hw *hw = dev->data->dev_private;
1323
1324         rte_spinlock_lock(&hw->state_lock);
1325
1326         if (hw->started == 0) {
1327                 /* Device is just stopped. */
1328                 rte_spinlock_unlock(&hw->state_lock);
1329                 return -1;
1330         }
1331         hw->started = 0;
1332         /*
1333          * Prevent the worker threads from touching queues to avoid contention,
1334          * 1 ms should be enough for the ongoing Tx function to finish.
1335          */
1336         rte_delay_ms(1);
1337         return 0;
1338 }
1339
1340 /*
1341  * Recover hw state to let the worker threads continue.
1342  */
1343 void
1344 virtio_dev_resume(struct rte_eth_dev *dev)
1345 {
1346         struct virtio_hw *hw = dev->data->dev_private;
1347
1348         hw->started = 1;
1349         rte_spinlock_unlock(&hw->state_lock);
1350 }
1351
1352 /*
1353  * Should be called only after device is paused.
1354  */
1355 int
1356 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1357                 int nb_pkts)
1358 {
1359         struct virtio_hw *hw = dev->data->dev_private;
1360         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1361         int ret;
1362
1363         hw->inject_pkts = tx_pkts;
1364         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1365         hw->inject_pkts = NULL;
1366
1367         return ret;
1368 }
1369
1370 static void
1371 virtio_notify_peers(struct rte_eth_dev *dev)
1372 {
1373         struct virtio_hw *hw = dev->data->dev_private;
1374         struct virtnet_rx *rxvq;
1375         struct rte_mbuf *rarp_mbuf;
1376
1377         if (!dev->data->rx_queues)
1378                 return;
1379
1380         rxvq = dev->data->rx_queues[0];
1381         if (!rxvq)
1382                 return;
1383
1384         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1385                         (struct ether_addr *)hw->mac_addr);
1386         if (rarp_mbuf == NULL) {
1387                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1388                 return;
1389         }
1390
1391         /* If virtio port just stopped, no need to send RARP */
1392         if (virtio_dev_pause(dev) < 0) {
1393                 rte_pktmbuf_free(rarp_mbuf);
1394                 return;
1395         }
1396
1397         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1398         virtio_dev_resume(dev);
1399 }
1400
1401 static void
1402 virtio_ack_link_announce(struct rte_eth_dev *dev)
1403 {
1404         struct virtio_hw *hw = dev->data->dev_private;
1405         struct virtio_pmd_ctrl ctrl;
1406
1407         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1408         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1409
1410         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1411 }
1412
1413 /*
1414  * Process virtio config changed interrupt. Call the callback
1415  * if link state changed, generate gratuitous RARP packet if
1416  * the status indicates an ANNOUNCE.
1417  */
1418 void
1419 virtio_interrupt_handler(void *param)
1420 {
1421         struct rte_eth_dev *dev = param;
1422         struct virtio_hw *hw = dev->data->dev_private;
1423         uint8_t isr;
1424         uint16_t status;
1425
1426         /* Read interrupt status which clears interrupt */
1427         isr = vtpci_isr(hw);
1428         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1429
1430         if (virtio_intr_enable(dev) < 0)
1431                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1432
1433         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1434                 if (virtio_dev_link_update(dev, 0) == 0)
1435                         _rte_eth_dev_callback_process(dev,
1436                                                       RTE_ETH_EVENT_INTR_LSC,
1437                                                       NULL);
1438
1439                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1440                         vtpci_read_dev_config(hw,
1441                                 offsetof(struct virtio_net_config, status),
1442                                 &status, sizeof(status));
1443                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1444                                 virtio_notify_peers(dev);
1445                                 if (hw->cvq)
1446                                         virtio_ack_link_announce(dev);
1447                         }
1448                 }
1449         }
1450 }
1451
1452 /* set rx and tx handlers according to what is supported */
1453 static void
1454 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1455 {
1456         struct virtio_hw *hw = eth_dev->data->dev_private;
1457
1458         if (vtpci_packed_queue(hw)) {
1459                 PMD_INIT_LOG(INFO,
1460                         "virtio: using packed ring %s Tx path on port %u",
1461                         hw->use_inorder_tx ? "inorder" : "standard",
1462                         eth_dev->data->port_id);
1463                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1464         } else {
1465                 if (hw->use_inorder_tx) {
1466                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1467                                 eth_dev->data->port_id);
1468                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1469                 } else {
1470                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1471                                 eth_dev->data->port_id);
1472                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1473                 }
1474         }
1475
1476         if (vtpci_packed_queue(hw)) {
1477                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1478                         PMD_INIT_LOG(INFO,
1479                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1480                                 eth_dev->data->port_id);
1481                         eth_dev->rx_pkt_burst =
1482                                 &virtio_recv_mergeable_pkts_packed;
1483                 } else {
1484                         PMD_INIT_LOG(INFO,
1485                                 "virtio: using packed ring standard Rx path on port %u",
1486                                 eth_dev->data->port_id);
1487                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1488                 }
1489         } else {
1490                 if (hw->use_simple_rx) {
1491                         PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1492                                 eth_dev->data->port_id);
1493                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1494                 } else if (hw->use_inorder_rx) {
1495                         PMD_INIT_LOG(INFO,
1496                                 "virtio: using inorder Rx path on port %u",
1497                                 eth_dev->data->port_id);
1498                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1499                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1500                         PMD_INIT_LOG(INFO,
1501                                 "virtio: using mergeable buffer Rx path on port %u",
1502                                 eth_dev->data->port_id);
1503                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1504                 } else {
1505                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1506                                 eth_dev->data->port_id);
1507                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1508                 }
1509         }
1510
1511 }
1512
1513 /* Only support 1:1 queue/interrupt mapping so far.
1514  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1515  * interrupt vectors (<N+1).
1516  */
1517 static int
1518 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1519 {
1520         uint32_t i;
1521         struct virtio_hw *hw = dev->data->dev_private;
1522
1523         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1524         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1525                 dev->intr_handle->intr_vec[i] = i + 1;
1526                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1527                                                  VIRTIO_MSI_NO_VECTOR) {
1528                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1529                         return -EBUSY;
1530                 }
1531         }
1532
1533         return 0;
1534 }
1535
1536 static void
1537 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1538 {
1539         uint32_t i;
1540         struct virtio_hw *hw = dev->data->dev_private;
1541
1542         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1543         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1544                 VTPCI_OPS(hw)->set_queue_irq(hw,
1545                                              hw->vqs[i * VTNET_CQ],
1546                                              VIRTIO_MSI_NO_VECTOR);
1547 }
1548
1549 static int
1550 virtio_configure_intr(struct rte_eth_dev *dev)
1551 {
1552         struct virtio_hw *hw = dev->data->dev_private;
1553
1554         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1555                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1556                 return -ENOTSUP;
1557         }
1558
1559         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1560                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1561                 return -1;
1562         }
1563
1564         if (!dev->intr_handle->intr_vec) {
1565                 dev->intr_handle->intr_vec =
1566                         rte_zmalloc("intr_vec",
1567                                     hw->max_queue_pairs * sizeof(int), 0);
1568                 if (!dev->intr_handle->intr_vec) {
1569                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1570                                      hw->max_queue_pairs);
1571                         return -ENOMEM;
1572                 }
1573         }
1574
1575         /* Re-register callback to update max_intr */
1576         rte_intr_callback_unregister(dev->intr_handle,
1577                                      virtio_interrupt_handler,
1578                                      dev);
1579         rte_intr_callback_register(dev->intr_handle,
1580                                    virtio_interrupt_handler,
1581                                    dev);
1582
1583         /* DO NOT try to remove this! This function will enable msix, or QEMU
1584          * will encounter SIGSEGV when DRIVER_OK is sent.
1585          * And for legacy devices, this should be done before queue/vec binding
1586          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1587          * (22) will be ignored.
1588          */
1589         if (virtio_intr_enable(dev) < 0) {
1590                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1591                 return -1;
1592         }
1593
1594         if (virtio_queues_bind_intr(dev) < 0) {
1595                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1596                 return -1;
1597         }
1598
1599         return 0;
1600 }
1601
1602 /* reset device and renegotiate features if needed */
1603 static int
1604 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1605 {
1606         struct virtio_hw *hw = eth_dev->data->dev_private;
1607         struct virtio_net_config *config;
1608         struct virtio_net_config local_config;
1609         struct rte_pci_device *pci_dev = NULL;
1610         int ret;
1611
1612         /* Reset the device although not necessary at startup */
1613         vtpci_reset(hw);
1614
1615         if (hw->vqs) {
1616                 virtio_dev_free_mbufs(eth_dev);
1617                 virtio_free_queues(hw);
1618         }
1619
1620         /* Tell the host we've noticed this device. */
1621         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1622
1623         /* Tell the host we've known how to drive the device. */
1624         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1625         if (virtio_negotiate_features(hw, req_features) < 0)
1626                 return -1;
1627
1628         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1629
1630         if (!hw->virtio_user_dev) {
1631                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1632                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1633         }
1634
1635         /* If host does not support both status and MSI-X then disable LSC */
1636         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1637             hw->use_msix != VIRTIO_MSIX_NONE)
1638                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1639         else
1640                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1641
1642         /* Setting up rx_header size for the device */
1643         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1644             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1645             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1646                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1647         else
1648                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1649
1650         /* Copy the permanent MAC address to: virtio_hw */
1651         virtio_get_hwaddr(hw);
1652         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1653                         &eth_dev->data->mac_addrs[0]);
1654         PMD_INIT_LOG(DEBUG,
1655                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1656                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1657                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1658
1659         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1660                 config = &local_config;
1661
1662                 vtpci_read_dev_config(hw,
1663                         offsetof(struct virtio_net_config, mac),
1664                         &config->mac, sizeof(config->mac));
1665
1666                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1667                         vtpci_read_dev_config(hw,
1668                                 offsetof(struct virtio_net_config, status),
1669                                 &config->status, sizeof(config->status));
1670                 } else {
1671                         PMD_INIT_LOG(DEBUG,
1672                                      "VIRTIO_NET_F_STATUS is not supported");
1673                         config->status = 0;
1674                 }
1675
1676                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1677                         vtpci_read_dev_config(hw,
1678                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1679                                 &config->max_virtqueue_pairs,
1680                                 sizeof(config->max_virtqueue_pairs));
1681                 } else {
1682                         PMD_INIT_LOG(DEBUG,
1683                                      "VIRTIO_NET_F_MQ is not supported");
1684                         config->max_virtqueue_pairs = 1;
1685                 }
1686
1687                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1688
1689                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1690                         vtpci_read_dev_config(hw,
1691                                 offsetof(struct virtio_net_config, mtu),
1692                                 &config->mtu,
1693                                 sizeof(config->mtu));
1694
1695                         /*
1696                          * MTU value has already been checked at negotiation
1697                          * time, but check again in case it has changed since
1698                          * then, which should not happen.
1699                          */
1700                         if (config->mtu < ETHER_MIN_MTU) {
1701                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1702                                                 config->mtu);
1703                                 return -1;
1704                         }
1705
1706                         hw->max_mtu = config->mtu;
1707                         /* Set initial MTU to maximum one supported by vhost */
1708                         eth_dev->data->mtu = config->mtu;
1709
1710                 } else {
1711                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1712                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1713                 }
1714
1715                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1716                                 config->max_virtqueue_pairs);
1717                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1718                 PMD_INIT_LOG(DEBUG,
1719                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1720                                 config->mac[0], config->mac[1],
1721                                 config->mac[2], config->mac[3],
1722                                 config->mac[4], config->mac[5]);
1723         } else {
1724                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1725                 hw->max_queue_pairs = 1;
1726                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1727                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1728         }
1729
1730         ret = virtio_alloc_queues(eth_dev);
1731         if (ret < 0)
1732                 return ret;
1733
1734         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1735                 if (virtio_configure_intr(eth_dev) < 0) {
1736                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1737                         return -1;
1738                 }
1739         }
1740
1741         vtpci_reinit_complete(hw);
1742
1743         if (pci_dev)
1744                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1745                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1746                         pci_dev->id.device_id);
1747
1748         return 0;
1749 }
1750
1751 /*
1752  * Remap the PCI device again (IO port map for legacy device and
1753  * memory map for modern device), so that the secondary process
1754  * could have the PCI initiated correctly.
1755  */
1756 static int
1757 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1758 {
1759         if (hw->modern) {
1760                 /*
1761                  * We don't have to re-parse the PCI config space, since
1762                  * rte_pci_map_device() makes sure the mapped address
1763                  * in secondary process would equal to the one mapped in
1764                  * the primary process: error will be returned if that
1765                  * requirement is not met.
1766                  *
1767                  * That said, we could simply reuse all cap pointers
1768                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1769                  * primary process, which is stored in shared memory.
1770                  */
1771                 if (rte_pci_map_device(pci_dev)) {
1772                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1773                         return -1;
1774                 }
1775         } else {
1776                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1777                         return -1;
1778         }
1779
1780         return 0;
1781 }
1782
1783 static void
1784 virtio_set_vtpci_ops(struct virtio_hw *hw)
1785 {
1786 #ifdef RTE_VIRTIO_USER
1787         if (hw->virtio_user_dev)
1788                 VTPCI_OPS(hw) = &virtio_user_ops;
1789         else
1790 #endif
1791         if (hw->modern)
1792                 VTPCI_OPS(hw) = &modern_ops;
1793         else
1794                 VTPCI_OPS(hw) = &legacy_ops;
1795 }
1796
1797 /*
1798  * This function is based on probe() function in virtio_pci.c
1799  * It returns 0 on success.
1800  */
1801 int
1802 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1803 {
1804         struct virtio_hw *hw = eth_dev->data->dev_private;
1805         int ret;
1806
1807         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1808
1809         eth_dev->dev_ops = &virtio_eth_dev_ops;
1810
1811         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1812                 if (!hw->virtio_user_dev) {
1813                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1814                         if (ret)
1815                                 return ret;
1816                 }
1817
1818                 virtio_set_vtpci_ops(hw);
1819                 set_rxtx_funcs(eth_dev);
1820
1821                 return 0;
1822         }
1823
1824         /* Allocate memory for storing MAC addresses */
1825         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1826         if (eth_dev->data->mac_addrs == NULL) {
1827                 PMD_INIT_LOG(ERR,
1828                         "Failed to allocate %d bytes needed to store MAC addresses",
1829                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1830                 return -ENOMEM;
1831         }
1832
1833         hw->port_id = eth_dev->data->port_id;
1834         /* For virtio_user case the hw->virtio_user_dev is populated by
1835          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1836          */
1837         if (!hw->virtio_user_dev) {
1838                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1839                 if (ret)
1840                         goto out;
1841         }
1842
1843         /* reset device and negotiate default features */
1844         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1845         if (ret < 0)
1846                 goto out;
1847
1848         return 0;
1849
1850 out:
1851         rte_free(eth_dev->data->mac_addrs);
1852         return ret;
1853 }
1854
1855 static int
1856 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1857 {
1858         PMD_INIT_FUNC_TRACE();
1859
1860         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1861                 return 0;
1862
1863         virtio_dev_stop(eth_dev);
1864         virtio_dev_close(eth_dev);
1865
1866         eth_dev->dev_ops = NULL;
1867         eth_dev->tx_pkt_burst = NULL;
1868         eth_dev->rx_pkt_burst = NULL;
1869
1870         if (eth_dev->device)
1871                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1872
1873         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1874
1875         return 0;
1876 }
1877
1878 static int vdpa_check_handler(__rte_unused const char *key,
1879                 const char *value, __rte_unused void *opaque)
1880 {
1881         if (strcmp(value, "1"))
1882                 return -1;
1883
1884         return 0;
1885 }
1886
1887 static int
1888 vdpa_mode_selected(struct rte_devargs *devargs)
1889 {
1890         struct rte_kvargs *kvlist;
1891         const char *key = "vdpa";
1892         int ret = 0;
1893
1894         if (devargs == NULL)
1895                 return 0;
1896
1897         kvlist = rte_kvargs_parse(devargs->args, NULL);
1898         if (kvlist == NULL)
1899                 return 0;
1900
1901         if (!rte_kvargs_count(kvlist, key))
1902                 goto exit;
1903
1904         /* vdpa mode selected when there's a key-value pair: vdpa=1 */
1905         if (rte_kvargs_process(kvlist, key,
1906                                 vdpa_check_handler, NULL) < 0) {
1907                 goto exit;
1908         }
1909         ret = 1;
1910
1911 exit:
1912         rte_kvargs_free(kvlist);
1913         return ret;
1914 }
1915
1916 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1917         struct rte_pci_device *pci_dev)
1918 {
1919         if (rte_eal_iopl_init() != 0) {
1920                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1921                 return 1;
1922         }
1923
1924         /* virtio pmd skips probe if device needs to work in vdpa mode */
1925         if (vdpa_mode_selected(pci_dev->device.devargs))
1926                 return 1;
1927
1928         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1929                 eth_virtio_dev_init);
1930 }
1931
1932 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1933 {
1934         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1935 }
1936
1937 static struct rte_pci_driver rte_virtio_pmd = {
1938         .driver = {
1939                 .name = "net_virtio",
1940         },
1941         .id_table = pci_id_virtio_map,
1942         .drv_flags = 0,
1943         .probe = eth_virtio_pci_probe,
1944         .remove = eth_virtio_pci_remove,
1945 };
1946
1947 RTE_INIT(rte_virtio_pmd_init)
1948 {
1949         rte_eal_iopl_init();
1950         rte_pci_register(&rte_virtio_pmd);
1951 }
1952
1953 static bool
1954 rx_offload_enabled(struct virtio_hw *hw)
1955 {
1956         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
1957                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1958                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
1959 }
1960
1961 static bool
1962 tx_offload_enabled(struct virtio_hw *hw)
1963 {
1964         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
1965                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
1966                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
1967 }
1968
1969 /*
1970  * Configure virtio device
1971  * It returns 0 on success.
1972  */
1973 static int
1974 virtio_dev_configure(struct rte_eth_dev *dev)
1975 {
1976         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1977         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
1978         struct virtio_hw *hw = dev->data->dev_private;
1979         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
1980                 hw->vtnet_hdr_size;
1981         uint64_t rx_offloads = rxmode->offloads;
1982         uint64_t tx_offloads = txmode->offloads;
1983         uint64_t req_features;
1984         int ret;
1985
1986         PMD_INIT_LOG(DEBUG, "configure");
1987         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1988
1989         if (dev->data->dev_conf.intr_conf.rxq) {
1990                 ret = virtio_init_device(dev, hw->req_guest_features);
1991                 if (ret < 0)
1992                         return ret;
1993         }
1994
1995         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
1996                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1997
1998         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1999                            DEV_RX_OFFLOAD_TCP_CKSUM))
2000                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2001
2002         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2003                 req_features |=
2004                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2005                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2006
2007         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2008                            DEV_TX_OFFLOAD_TCP_CKSUM))
2009                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2010
2011         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2012                 req_features |=
2013                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2014                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2015
2016         /* if request features changed, reinit the device */
2017         if (req_features != hw->req_guest_features) {
2018                 ret = virtio_init_device(dev, req_features);
2019                 if (ret < 0)
2020                         return ret;
2021         }
2022
2023         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2024                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2025                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2026                 PMD_DRV_LOG(ERR,
2027                         "rx checksum not available on this host");
2028                 return -ENOTSUP;
2029         }
2030
2031         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2032                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2033                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2034                 PMD_DRV_LOG(ERR,
2035                         "Large Receive Offload not available on this host");
2036                 return -ENOTSUP;
2037         }
2038
2039         /* start control queue */
2040         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2041                 virtio_dev_cq_start(dev);
2042
2043         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2044                 hw->vlan_strip = 1;
2045
2046         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2047             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2048                 PMD_DRV_LOG(ERR,
2049                             "vlan filtering not available on this host");
2050                 return -ENOTSUP;
2051         }
2052
2053         hw->has_tx_offload = tx_offload_enabled(hw);
2054         hw->has_rx_offload = rx_offload_enabled(hw);
2055
2056         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2057                 /* Enable vector (0) for Link State Intrerrupt */
2058                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2059                                 VIRTIO_MSI_NO_VECTOR) {
2060                         PMD_DRV_LOG(ERR, "failed to set config vector");
2061                         return -EBUSY;
2062                 }
2063
2064         rte_spinlock_init(&hw->state_lock);
2065
2066         hw->use_simple_rx = 1;
2067
2068         if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2069                 hw->use_inorder_tx = 1;
2070                 hw->use_inorder_rx = 1;
2071                 hw->use_simple_rx = 0;
2072         }
2073
2074         if (vtpci_packed_queue(hw)) {
2075                 hw->use_simple_rx = 0;
2076                 hw->use_inorder_rx = 0;
2077         }
2078
2079 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
2080         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2081                 hw->use_simple_rx = 0;
2082         }
2083 #endif
2084         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2085                  hw->use_simple_rx = 0;
2086         }
2087
2088         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2089                            DEV_RX_OFFLOAD_TCP_CKSUM |
2090                            DEV_RX_OFFLOAD_TCP_LRO |
2091                            DEV_RX_OFFLOAD_VLAN_STRIP))
2092                 hw->use_simple_rx = 0;
2093
2094         hw->opened = true;
2095
2096         return 0;
2097 }
2098
2099
2100 static int
2101 virtio_dev_start(struct rte_eth_dev *dev)
2102 {
2103         uint16_t nb_queues, i;
2104         struct virtnet_rx *rxvq;
2105         struct virtnet_tx *txvq __rte_unused;
2106         struct virtio_hw *hw = dev->data->dev_private;
2107         int ret;
2108
2109         /* Finish the initialization of the queues */
2110         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2111                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2112                 if (ret < 0)
2113                         return ret;
2114         }
2115         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2116                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2117                 if (ret < 0)
2118                         return ret;
2119         }
2120
2121         /* check if lsc interrupt feature is enabled */
2122         if (dev->data->dev_conf.intr_conf.lsc) {
2123                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2124                         PMD_DRV_LOG(ERR, "link status not supported by host");
2125                         return -ENOTSUP;
2126                 }
2127         }
2128
2129         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2130          * in device configure, but it could be unmapped  when device is
2131          * stopped.
2132          */
2133         if (dev->data->dev_conf.intr_conf.lsc ||
2134             dev->data->dev_conf.intr_conf.rxq) {
2135                 virtio_intr_disable(dev);
2136
2137                 /* Setup interrupt callback  */
2138                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2139                         rte_intr_callback_register(dev->intr_handle,
2140                                                    virtio_interrupt_handler,
2141                                                    dev);
2142
2143                 if (virtio_intr_enable(dev) < 0) {
2144                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2145                         return -EIO;
2146                 }
2147         }
2148
2149         /*Notify the backend
2150          *Otherwise the tap backend might already stop its queue due to fullness.
2151          *vhost backend will have no chance to be waked up
2152          */
2153         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2154         if (hw->max_queue_pairs > 1) {
2155                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2156                         return -EINVAL;
2157         }
2158
2159         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2160
2161         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2162                 rxvq = dev->data->rx_queues[i];
2163                 /* Flush the old packets */
2164                 virtqueue_rxvq_flush(rxvq->vq);
2165                 virtqueue_notify(rxvq->vq);
2166         }
2167
2168         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2169                 txvq = dev->data->tx_queues[i];
2170                 virtqueue_notify(txvq->vq);
2171         }
2172
2173         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2174
2175         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2176                 rxvq = dev->data->rx_queues[i];
2177                 VIRTQUEUE_DUMP(rxvq->vq);
2178         }
2179
2180         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2181                 txvq = dev->data->tx_queues[i];
2182                 VIRTQUEUE_DUMP(txvq->vq);
2183         }
2184
2185         set_rxtx_funcs(dev);
2186         hw->started = true;
2187
2188         /* Initialize Link state */
2189         virtio_dev_link_update(dev, 0);
2190
2191         return 0;
2192 }
2193
2194 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2195 {
2196         struct virtio_hw *hw = dev->data->dev_private;
2197         uint16_t nr_vq = virtio_get_nr_vq(hw);
2198         const char *type __rte_unused;
2199         unsigned int i, mbuf_num = 0;
2200         struct virtqueue *vq;
2201         struct rte_mbuf *buf;
2202         int queue_type;
2203
2204         if (hw->vqs == NULL)
2205                 return;
2206
2207         for (i = 0; i < nr_vq; i++) {
2208                 vq = hw->vqs[i];
2209                 if (!vq)
2210                         continue;
2211
2212                 queue_type = virtio_get_queue_type(hw, i);
2213                 if (queue_type == VTNET_RQ)
2214                         type = "rxq";
2215                 else if (queue_type == VTNET_TQ)
2216                         type = "txq";
2217                 else
2218                         continue;
2219
2220                 PMD_INIT_LOG(DEBUG,
2221                         "Before freeing %s[%d] used and unused buf",
2222                         type, i);
2223                 VIRTQUEUE_DUMP(vq);
2224
2225                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2226                         rte_pktmbuf_free(buf);
2227                         mbuf_num++;
2228                 }
2229
2230                 PMD_INIT_LOG(DEBUG,
2231                         "After freeing %s[%d] used and unused buf",
2232                         type, i);
2233                 VIRTQUEUE_DUMP(vq);
2234         }
2235
2236         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2237 }
2238
2239 /*
2240  * Stop device: disable interrupt and mark link down
2241  */
2242 static void
2243 virtio_dev_stop(struct rte_eth_dev *dev)
2244 {
2245         struct virtio_hw *hw = dev->data->dev_private;
2246         struct rte_eth_link link;
2247         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2248
2249         PMD_INIT_LOG(DEBUG, "stop");
2250
2251         rte_spinlock_lock(&hw->state_lock);
2252         if (!hw->started)
2253                 goto out_unlock;
2254         hw->started = false;
2255
2256         if (intr_conf->lsc || intr_conf->rxq) {
2257                 virtio_intr_disable(dev);
2258
2259                 /* Reset interrupt callback  */
2260                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2261                         rte_intr_callback_unregister(dev->intr_handle,
2262                                                      virtio_interrupt_handler,
2263                                                      dev);
2264                 }
2265         }
2266
2267         memset(&link, 0, sizeof(link));
2268         rte_eth_linkstatus_set(dev, &link);
2269 out_unlock:
2270         rte_spinlock_unlock(&hw->state_lock);
2271 }
2272
2273 static int
2274 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2275 {
2276         struct rte_eth_link link;
2277         uint16_t status;
2278         struct virtio_hw *hw = dev->data->dev_private;
2279
2280         memset(&link, 0, sizeof(link));
2281         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2282         link.link_speed  = ETH_SPEED_NUM_10G;
2283         link.link_autoneg = ETH_LINK_FIXED;
2284
2285         if (!hw->started) {
2286                 link.link_status = ETH_LINK_DOWN;
2287         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2288                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2289                 vtpci_read_dev_config(hw,
2290                                 offsetof(struct virtio_net_config, status),
2291                                 &status, sizeof(status));
2292                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2293                         link.link_status = ETH_LINK_DOWN;
2294                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2295                                      dev->data->port_id);
2296                 } else {
2297                         link.link_status = ETH_LINK_UP;
2298                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2299                                      dev->data->port_id);
2300                 }
2301         } else {
2302                 link.link_status = ETH_LINK_UP;
2303         }
2304
2305         return rte_eth_linkstatus_set(dev, &link);
2306 }
2307
2308 static int
2309 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2310 {
2311         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2312         struct virtio_hw *hw = dev->data->dev_private;
2313         uint64_t offloads = rxmode->offloads;
2314
2315         if (mask & ETH_VLAN_FILTER_MASK) {
2316                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2317                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2318
2319                         PMD_DRV_LOG(NOTICE,
2320                                 "vlan filtering not available on this host");
2321
2322                         return -ENOTSUP;
2323                 }
2324         }
2325
2326         if (mask & ETH_VLAN_STRIP_MASK)
2327                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2328
2329         return 0;
2330 }
2331
2332 static void
2333 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2334 {
2335         uint64_t tso_mask, host_features;
2336         struct virtio_hw *hw = dev->data->dev_private;
2337
2338         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2339
2340         dev_info->max_rx_queues =
2341                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2342         dev_info->max_tx_queues =
2343                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2344         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2345         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2346         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2347
2348         host_features = VTPCI_OPS(hw)->get_features(hw);
2349         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2350         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2351         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2352                 dev_info->rx_offload_capa |=
2353                         DEV_RX_OFFLOAD_TCP_CKSUM |
2354                         DEV_RX_OFFLOAD_UDP_CKSUM;
2355         }
2356         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2357                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2358         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2359                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2360         if ((host_features & tso_mask) == tso_mask)
2361                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2362
2363         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2364                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2365         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2366                 dev_info->tx_offload_capa |=
2367                         DEV_TX_OFFLOAD_UDP_CKSUM |
2368                         DEV_TX_OFFLOAD_TCP_CKSUM;
2369         }
2370         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2371                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2372         if ((host_features & tso_mask) == tso_mask)
2373                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2374 }
2375
2376 /*
2377  * It enables testpmd to collect per queue stats.
2378  */
2379 static int
2380 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2381 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2382 __rte_unused uint8_t is_rx)
2383 {
2384         return 0;
2385 }
2386
2387 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2388 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2389 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2390
2391 RTE_INIT(virtio_init_log)
2392 {
2393         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2394         if (virtio_logtype_init >= 0)
2395                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2396         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2397         if (virtio_logtype_driver >= 0)
2398                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2399 }