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_atomic.h>
  18 #include <rte_branch_prediction.h>
  19 #include <rte_pci.h>
  20 #include <rte_bus_pci.h>
  21 #include <rte_ether.h>
  22 #include <rte_ip.h>
  23 #include <rte_arp.h>
  24 #include <rte_common.h>
  25 #include <rte_errno.h>
  26 #include <rte_cpuflags.h>
  27
  28 #include <rte_memory.h>
  29 #include <rte_eal.h>
  30 #include <rte_dev.h>
  31 #include <rte_cycles.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 void virtio_mac_addr_set(struct rte_eth_dev *dev,
  72                                 struct ether_addr *mac_addr);
  73
  74 static int virtio_intr_enable(struct rte_eth_dev *dev);
  75 static int virtio_intr_disable(struct rte_eth_dev *dev);
  76
  77 static int virtio_dev_queue_stats_mapping_set(
  78         struct rte_eth_dev *eth_dev,
  79         uint16_t queue_id,
  80         uint8_t stat_idx,
  81         uint8_t is_rx);
  82
  83 int virtio_logtype_init;
  84 int virtio_logtype_driver;
  85
  86 static void virtio_notify_peers(struct rte_eth_dev *dev);
  87 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  88
  89 /*
  90  * The set of PCI devices this driver supports
  91  */
  92 static const struct rte_pci_id pci_id_virtio_map[] = {
  93         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  94         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  95         { .vendor_id = 0, /* sentinel */ },
  96 };
  97
  98 struct rte_virtio_xstats_name_off {
  99         char name[RTE_ETH_XSTATS_NAME_SIZE];
 100         unsigned offset;
 101 };
 102
 103 /* [rt]x_qX_ is prepended to the name string here */
 104 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 105         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 106         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 107         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 108         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 109         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 110         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 111         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 112         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 113         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 114         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 115         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 116         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 117         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 118 };
 119
 120 /* [rt]x_qX_ is prepended to the name string here */
 121 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 122         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 123         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 124         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 125         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 126         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 127         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 128         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 129         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 130         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 131         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 132         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 133         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 134         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 135 };
 136
 137 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 138                             sizeof(rte_virtio_rxq_stat_strings[0]))
 139 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 140                             sizeof(rte_virtio_txq_stat_strings[0]))
 141
 142 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 143
 144 static int
 145 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 146                 int *dlen, int pkt_num)
 147 {
 148         uint32_t head, i;
 149         int k, sum = 0;
 150         virtio_net_ctrl_ack status = ~0;
 151         struct virtio_pmd_ctrl *result;
 152         struct virtqueue *vq;
 153
 154         ctrl->status = status;
 155
 156         if (!cvq || !cvq->vq) {
 157                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 158                 return -1;
 159         }
 160
 161         rte_spinlock_lock(&cvq->lock);
 162         vq = cvq->vq;
 163         head = vq->vq_desc_head_idx;
 164
 165         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 166                 "vq->hw->cvq = %p vq = %p",
 167                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 168
 169         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 170                 rte_spinlock_unlock(&cvq->lock);
 171                 return -1;
 172         }
 173
 174         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 175                 sizeof(struct virtio_pmd_ctrl));
 176
 177         /*
 178          * Format is enforced in qemu code:
 179          * One TX packet for header;
 180          * At least one TX packet per argument;
 181          * One RX packet for ACK.
 182          */
 183         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 184         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 185         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 186         vq->vq_free_cnt--;
 187         i = vq->vq_ring.desc[head].next;
 188
 189         for (k = 0; k < pkt_num; k++) {
 190                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 191                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 192                         + sizeof(struct virtio_net_ctrl_hdr)
 193                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 194                 vq->vq_ring.desc[i].len = dlen[k];
 195                 sum += dlen[k];
 196                 vq->vq_free_cnt--;
 197                 i = vq->vq_ring.desc[i].next;
 198         }
 199
 200         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 201         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 202                         + sizeof(struct virtio_net_ctrl_hdr);
 203         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 204         vq->vq_free_cnt--;
 205
 206         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 207
 208         vq_update_avail_ring(vq, head);
 209         vq_update_avail_idx(vq);
 210
 211         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 212
 213         virtqueue_notify(vq);
 214
 215         rte_rmb();
 216         while (VIRTQUEUE_NUSED(vq) == 0) {
 217                 rte_rmb();
 218                 usleep(100);
 219         }
 220
 221         while (VIRTQUEUE_NUSED(vq)) {
 222                 uint32_t idx, desc_idx, used_idx;
 223                 struct vring_used_elem *uep;
 224
 225                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 226                                 & (vq->vq_nentries - 1));
 227                 uep = &vq->vq_ring.used->ring[used_idx];
 228                 idx = (uint32_t) uep->id;
 229                 desc_idx = idx;
 230
 231                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 232                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 233                         vq->vq_free_cnt++;
 234                 }
 235
 236                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 237                 vq->vq_desc_head_idx = idx;
 238
 239                 vq->vq_used_cons_idx++;
 240                 vq->vq_free_cnt++;
 241         }
 242
 243         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 244                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 245
 246         result = cvq->virtio_net_hdr_mz->addr;
 247
 248         rte_spinlock_unlock(&cvq->lock);
 249         return result->status;
 250 }
 251
 252 static int
 253 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 254 {
 255         struct virtio_hw *hw = dev->data->dev_private;
 256         struct virtio_pmd_ctrl ctrl;
 257         int dlen[1];
 258         int ret;
 259
 260         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 261         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 262         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 263
 264         dlen[0] = sizeof(uint16_t);
 265
 266         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 267         if (ret) {
 268                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 269                           "failed, this is too late now...");
 270                 return -EINVAL;
 271         }
 272
 273         return 0;
 274 }
 275
 276 static void
 277 virtio_dev_queue_release(void *queue __rte_unused)
 278 {
 279         /* do nothing */
 280 }
 281
 282 static uint16_t
 283 virtio_get_nr_vq(struct virtio_hw *hw)
 284 {
 285         uint16_t nr_vq = hw->max_queue_pairs * 2;
 286
 287         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 288                 nr_vq += 1;
 289
 290         return nr_vq;
 291 }
 292
 293 static void
 294 virtio_init_vring(struct virtqueue *vq)
 295 {
 296         int size = vq->vq_nentries;
 297         struct vring *vr = &vq->vq_ring;
 298         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 299
 300         PMD_INIT_FUNC_TRACE();
 301
 302         /*
 303          * Reinitialise since virtio port might have been stopped and restarted
 304          */
 305         memset(ring_mem, 0, vq->vq_ring_size);
 306         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 307         vq->vq_used_cons_idx = 0;
 308         vq->vq_desc_head_idx = 0;
 309         vq->vq_avail_idx = 0;
 310         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 311         vq->vq_free_cnt = vq->vq_nentries;
 312         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 313
 314         vring_desc_init(vr->desc, size);
 315
 316         /*
 317          * Disable device(host) interrupting guest
 318          */
 319         virtqueue_disable_intr(vq);
 320 }
 321
 322 static int
 323 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 324 {
 325         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 326         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 327         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 328         unsigned int vq_size, size;
 329         struct virtio_hw *hw = dev->data->dev_private;
 330         struct virtnet_rx *rxvq = NULL;
 331         struct virtnet_tx *txvq = NULL;
 332         struct virtnet_ctl *cvq = NULL;
 333         struct virtqueue *vq;
 334         size_t sz_hdr_mz = 0;
 335         void *sw_ring = NULL;
 336         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 337         int ret;
 338
 339         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 340
 341         /*
 342          * Read the virtqueue size from the Queue Size field
 343          * Always power of 2 and if 0 virtqueue does not exist
 344          */
 345         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 346         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 347         if (vq_size == 0) {
 348                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 349                 return -EINVAL;
 350         }
 351
 352         if (!rte_is_power_of_2(vq_size)) {
 353                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 354                 return -EINVAL;
 355         }
 356
 357         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 358                  dev->data->port_id, vtpci_queue_idx);
 359
 360         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 361                                 vq_size * sizeof(struct vq_desc_extra),
 362                                 RTE_CACHE_LINE_SIZE);
 363         if (queue_type == VTNET_TQ) {
 364                 /*
 365                  * For each xmit packet, allocate a virtio_net_hdr
 366                  * and indirect ring elements
 367                  */
 368                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 369         } else if (queue_type == VTNET_CQ) {
 370                 /* Allocate a page for control vq command, data and status */
 371                 sz_hdr_mz = PAGE_SIZE;
 372         }
 373
 374         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 375                                 SOCKET_ID_ANY);
 376         if (vq == NULL) {
 377                 PMD_INIT_LOG(ERR, "can not allocate vq");
 378                 return -ENOMEM;
 379         }
 380         hw->vqs[vtpci_queue_idx] = vq;
 381
 382         vq->hw = hw;
 383         vq->vq_queue_index = vtpci_queue_idx;
 384         vq->vq_nentries = vq_size;
 385
 386         /*
 387          * Reserve a memzone for vring elements
 388          */
 389         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 390         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 391         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 392                      size, vq->vq_ring_size);
 393
 394         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 395                                          SOCKET_ID_ANY,
 396                                          0, VIRTIO_PCI_VRING_ALIGN);
 397         if (mz == NULL) {
 398                 if (rte_errno == EEXIST)
 399                         mz = rte_memzone_lookup(vq_name);
 400                 if (mz == NULL) {
 401                         ret = -ENOMEM;
 402                         goto fail_q_alloc;
 403                 }
 404         }
 405
 406         memset(mz->addr, 0, mz->len);
 407
 408         vq->vq_ring_mem = mz->iova;
 409         vq->vq_ring_virt_mem = mz->addr;
 410         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 411                      (uint64_t)mz->iova);
 412         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 413                      (uint64_t)(uintptr_t)mz->addr);
 414
 415         virtio_init_vring(vq);
 416
 417         if (sz_hdr_mz) {
 418                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 419                          dev->data->port_id, vtpci_queue_idx);
 420                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 421                                                      SOCKET_ID_ANY, 0,
 422                                                      RTE_CACHE_LINE_SIZE);
 423                 if (hdr_mz == NULL) {
 424                         if (rte_errno == EEXIST)
 425                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 426                         if (hdr_mz == NULL) {
 427                                 ret = -ENOMEM;
 428                                 goto fail_q_alloc;
 429                         }
 430                 }
 431         }
 432
 433         if (queue_type == VTNET_RQ) {
 434                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 435                                sizeof(vq->sw_ring[0]);
 436
 437                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 438                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 439                 if (!sw_ring) {
 440                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 441                         ret = -ENOMEM;
 442                         goto fail_q_alloc;
 443                 }
 444
 445                 vq->sw_ring = sw_ring;
 446                 rxvq = &vq->rxq;
 447                 rxvq->vq = vq;
 448                 rxvq->port_id = dev->data->port_id;
 449                 rxvq->mz = mz;
 450         } else if (queue_type == VTNET_TQ) {
 451                 txvq = &vq->txq;
 452                 txvq->vq = vq;
 453                 txvq->port_id = dev->data->port_id;
 454                 txvq->mz = mz;
 455                 txvq->virtio_net_hdr_mz = hdr_mz;
 456                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 457         } else if (queue_type == VTNET_CQ) {
 458                 cvq = &vq->cq;
 459                 cvq->vq = vq;
 460                 cvq->mz = mz;
 461                 cvq->virtio_net_hdr_mz = hdr_mz;
 462                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 463                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 464
 465                 hw->cvq = cvq;
 466         }
 467
 468         /* For virtio_user case (that is when hw->dev is NULL), we use
 469          * virtual address. And we need properly set _offset_, please see
 470          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 471          */
 472         if (!hw->virtio_user_dev)
 473                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 474         else {
 475                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 476                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 477                 if (queue_type == VTNET_TQ)
 478                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 479                 else if (queue_type == VTNET_CQ)
 480                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 481         }
 482
 483         if (queue_type == VTNET_TQ) {
 484                 struct virtio_tx_region *txr;
 485                 unsigned int i;
 486
 487                 txr = hdr_mz->addr;
 488                 memset(txr, 0, vq_size * sizeof(*txr));
 489                 for (i = 0; i < vq_size; i++) {
 490                         struct vring_desc *start_dp = txr[i].tx_indir;
 491
 492                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 493
 494                         /* first indirect descriptor is always the tx header */
 495                         start_dp->addr = txvq->virtio_net_hdr_mem
 496                                 + i * sizeof(*txr)
 497                                 + offsetof(struct virtio_tx_region, tx_hdr);
 498
 499                         start_dp->len = hw->vtnet_hdr_size;
 500                         start_dp->flags = VRING_DESC_F_NEXT;
 501                 }
 502         }
 503
 504         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 505                 PMD_INIT_LOG(ERR, "setup_queue failed");
 506                 return -EINVAL;
 507         }
 508
 509         return 0;
 510
 511 fail_q_alloc:
 512         rte_free(sw_ring);
 513         rte_memzone_free(hdr_mz);
 514         rte_memzone_free(mz);
 515         rte_free(vq);
 516
 517         return ret;
 518 }
 519
 520 static void
 521 virtio_free_queues(struct virtio_hw *hw)
 522 {
 523         uint16_t nr_vq = virtio_get_nr_vq(hw);
 524         struct virtqueue *vq;
 525         int queue_type;
 526         uint16_t i;
 527
 528         if (hw->vqs == NULL)
 529                 return;
 530
 531         for (i = 0; i < nr_vq; i++) {
 532                 vq = hw->vqs[i];
 533                 if (!vq)
 534                         continue;
 535
 536                 queue_type = virtio_get_queue_type(hw, i);
 537                 if (queue_type == VTNET_RQ) {
 538                         rte_free(vq->sw_ring);
 539                         rte_memzone_free(vq->rxq.mz);
 540                 } else if (queue_type == VTNET_TQ) {
 541                         rte_memzone_free(vq->txq.mz);
 542                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 543                 } else {
 544                         rte_memzone_free(vq->cq.mz);
 545                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 546                 }
 547
 548                 rte_free(vq);
 549                 hw->vqs[i] = NULL;
 550         }
 551
 552         rte_free(hw->vqs);
 553         hw->vqs = NULL;
 554 }
 555
 556 static int
 557 virtio_alloc_queues(struct rte_eth_dev *dev)
 558 {
 559         struct virtio_hw *hw = dev->data->dev_private;
 560         uint16_t nr_vq = virtio_get_nr_vq(hw);
 561         uint16_t i;
 562         int ret;
 563
 564         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 565         if (!hw->vqs) {
 566                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 567                 return -ENOMEM;
 568         }
 569
 570         for (i = 0; i < nr_vq; i++) {
 571                 ret = virtio_init_queue(dev, i);
 572                 if (ret < 0) {
 573                         virtio_free_queues(hw);
 574                         return ret;
 575                 }
 576         }
 577
 578         return 0;
 579 }
 580
 581 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 582
 583 static void
 584 virtio_dev_close(struct rte_eth_dev *dev)
 585 {
 586         struct virtio_hw *hw = dev->data->dev_private;
 587         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 588
 589         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 590
 591         /* reset the NIC */
 592         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 593                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 594         if (intr_conf->rxq)
 595                 virtio_queues_unbind_intr(dev);
 596
 597         if (intr_conf->lsc || intr_conf->rxq) {
 598                 virtio_intr_disable(dev);
 599                 rte_intr_efd_disable(dev->intr_handle);
 600                 rte_free(dev->intr_handle->intr_vec);
 601                 dev->intr_handle->intr_vec = NULL;
 602         }
 603
 604         vtpci_reset(hw);
 605         virtio_dev_free_mbufs(dev);
 606         virtio_free_queues(hw);
 607 }
 608
 609 static void
 610 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 611 {
 612         struct virtio_hw *hw = dev->data->dev_private;
 613         struct virtio_pmd_ctrl ctrl;
 614         int dlen[1];
 615         int ret;
 616
 617         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 618                 PMD_INIT_LOG(INFO, "host does not support rx control");
 619                 return;
 620         }
 621
 622         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 623         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 624         ctrl.data[0] = 1;
 625         dlen[0] = 1;
 626
 627         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 628         if (ret)
 629                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 630 }
 631
 632 static void
 633 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 634 {
 635         struct virtio_hw *hw = dev->data->dev_private;
 636         struct virtio_pmd_ctrl ctrl;
 637         int dlen[1];
 638         int ret;
 639
 640         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 641                 PMD_INIT_LOG(INFO, "host does not support rx control");
 642                 return;
 643         }
 644
 645         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 646         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 647         ctrl.data[0] = 0;
 648         dlen[0] = 1;
 649
 650         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 651         if (ret)
 652                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 653 }
 654
 655 static void
 656 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 657 {
 658         struct virtio_hw *hw = dev->data->dev_private;
 659         struct virtio_pmd_ctrl ctrl;
 660         int dlen[1];
 661         int ret;
 662
 663         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 664                 PMD_INIT_LOG(INFO, "host does not support rx control");
 665                 return;
 666         }
 667
 668         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 669         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 670         ctrl.data[0] = 1;
 671         dlen[0] = 1;
 672
 673         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 674         if (ret)
 675                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 676 }
 677
 678 static void
 679 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 680 {
 681         struct virtio_hw *hw = dev->data->dev_private;
 682         struct virtio_pmd_ctrl ctrl;
 683         int dlen[1];
 684         int ret;
 685
 686         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 687                 PMD_INIT_LOG(INFO, "host does not support rx control");
 688                 return;
 689         }
 690
 691         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 692         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 693         ctrl.data[0] = 0;
 694         dlen[0] = 1;
 695
 696         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 697         if (ret)
 698                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 699 }
 700
 701 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 702 static int
 703 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 704 {
 705         struct virtio_hw *hw = dev->data->dev_private;
 706         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 707                                  hw->vtnet_hdr_size;
 708         uint32_t frame_size = mtu + ether_hdr_len;
 709         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 710
 711         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 712
 713         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 714                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 715                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 716                 return -EINVAL;
 717         }
 718         return 0;
 719 }
 720
 721 static int
 722 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 723 {
 724         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 725         struct virtqueue *vq = rxvq->vq;
 726
 727         virtqueue_enable_intr(vq);
 728         return 0;
 729 }
 730
 731 static int
 732 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 733 {
 734         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 735         struct virtqueue *vq = rxvq->vq;
 736
 737         virtqueue_disable_intr(vq);
 738         return 0;
 739 }
 740
 741 /*
 742  * dev_ops for virtio, bare necessities for basic operation
 743  */
 744 static const struct eth_dev_ops virtio_eth_dev_ops = {
 745         .dev_configure           = virtio_dev_configure,
 746         .dev_start               = virtio_dev_start,
 747         .dev_stop                = virtio_dev_stop,
 748         .dev_close               = virtio_dev_close,
 749         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 750         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 751         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 752         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 753         .mtu_set                 = virtio_mtu_set,
 754         .dev_infos_get           = virtio_dev_info_get,
 755         .stats_get               = virtio_dev_stats_get,
 756         .xstats_get              = virtio_dev_xstats_get,
 757         .xstats_get_names        = virtio_dev_xstats_get_names,
 758         .stats_reset             = virtio_dev_stats_reset,
 759         .xstats_reset            = virtio_dev_stats_reset,
 760         .link_update             = virtio_dev_link_update,
 761         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 762         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 763         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 764         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 765         .rx_queue_release        = virtio_dev_queue_release,
 766         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 767         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 768         .tx_queue_release        = virtio_dev_queue_release,
 769         /* collect stats per queue */
 770         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 771         .vlan_filter_set         = virtio_vlan_filter_set,
 772         .mac_addr_add            = virtio_mac_addr_add,
 773         .mac_addr_remove         = virtio_mac_addr_remove,
 774         .mac_addr_set            = virtio_mac_addr_set,
 775 };
 776
 777 static inline int
 778 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 779                                 struct rte_eth_link *link)
 780 {
 781         struct rte_eth_link *dst = link;
 782         struct rte_eth_link *src = &(dev->data->dev_link);
 783
 784         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 785                         *(uint64_t *)src) == 0)
 786                 return -1;
 787
 788         return 0;
 789 }
 790
 791 /**
 792  * Atomically writes the link status information into global
 793  * structure rte_eth_dev.
 794  *
 795  * @param dev
 796  *   - Pointer to the structure rte_eth_dev to read from.
 797  *   - Pointer to the buffer to be saved with the link status.
 798  *
 799  * @return
 800  *   - On success, zero.
 801  *   - On failure, negative value.
 802  */
 803 static inline int
 804 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 805                 struct rte_eth_link *link)
 806 {
 807         struct rte_eth_link *dst = &(dev->data->dev_link);
 808         struct rte_eth_link *src = link;
 809
 810         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 811                                         *(uint64_t *)src) == 0)
 812                 return -1;
 813
 814         return 0;
 815 }
 816
 817 static void
 818 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 819 {
 820         unsigned i;
 821
 822         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 823                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 824                 if (txvq == NULL)
 825                         continue;
 826
 827                 stats->opackets += txvq->stats.packets;
 828                 stats->obytes += txvq->stats.bytes;
 829                 stats->oerrors += txvq->stats.errors;
 830
 831                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 832                         stats->q_opackets[i] = txvq->stats.packets;
 833                         stats->q_obytes[i] = txvq->stats.bytes;
 834                 }
 835         }
 836
 837         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 838                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 839                 if (rxvq == NULL)
 840                         continue;
 841
 842                 stats->ipackets += rxvq->stats.packets;
 843                 stats->ibytes += rxvq->stats.bytes;
 844                 stats->ierrors += rxvq->stats.errors;
 845
 846                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 847                         stats->q_ipackets[i] = rxvq->stats.packets;
 848                         stats->q_ibytes[i] = rxvq->stats.bytes;
 849                 }
 850         }
 851
 852         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 853 }
 854
 855 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 856                                        struct rte_eth_xstat_name *xstats_names,
 857                                        __rte_unused unsigned limit)
 858 {
 859         unsigned i;
 860         unsigned count = 0;
 861         unsigned t;
 862
 863         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 864                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 865
 866         if (xstats_names != NULL) {
 867                 /* Note: limit checked in rte_eth_xstats_names() */
 868
 869                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 870                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 871                         if (rxvq == NULL)
 872                                 continue;
 873                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 874                                 snprintf(xstats_names[count].name,
 875                                         sizeof(xstats_names[count].name),
 876                                         "rx_q%u_%s", i,
 877                                         rte_virtio_rxq_stat_strings[t].name);
 878                                 count++;
 879                         }
 880                 }
 881
 882                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 883                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
 884                         if (txvq == NULL)
 885                                 continue;
 886                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 887                                 snprintf(xstats_names[count].name,
 888                                         sizeof(xstats_names[count].name),
 889                                         "tx_q%u_%s", i,
 890                                         rte_virtio_txq_stat_strings[t].name);
 891                                 count++;
 892                         }
 893                 }
 894                 return count;
 895         }
 896         return nstats;
 897 }
 898
 899 static int
 900 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 901                       unsigned n)
 902 {
 903         unsigned i;
 904         unsigned count = 0;
 905
 906         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 907                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 908
 909         if (n < nstats)
 910                 return nstats;
 911
 912         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 913                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 914
 915                 if (rxvq == NULL)
 916                         continue;
 917
 918                 unsigned t;
 919
 920                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 921                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 922                                 rte_virtio_rxq_stat_strings[t].offset);
 923                         xstats[count].id = count;
 924                         count++;
 925                 }
 926         }
 927
 928         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 929                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 930
 931                 if (txvq == NULL)
 932                         continue;
 933
 934                 unsigned t;
 935
 936                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 937                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 938                                 rte_virtio_txq_stat_strings[t].offset);
 939                         xstats[count].id = count;
 940                         count++;
 941                 }
 942         }
 943
 944         return count;
 945 }
 946
 947 static int
 948 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 949 {
 950         virtio_update_stats(dev, stats);
 951
 952         return 0;
 953 }
 954
 955 static void
 956 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 957 {
 958         unsigned int i;
 959
 960         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 961                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 962                 if (txvq == NULL)
 963                         continue;
 964
 965                 txvq->stats.packets = 0;
 966                 txvq->stats.bytes = 0;
 967                 txvq->stats.errors = 0;
 968                 txvq->stats.multicast = 0;
 969                 txvq->stats.broadcast = 0;
 970                 memset(txvq->stats.size_bins, 0,
 971                        sizeof(txvq->stats.size_bins[0]) * 8);
 972         }
 973
 974         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 975                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 976                 if (rxvq == NULL)
 977                         continue;
 978
 979                 rxvq->stats.packets = 0;
 980                 rxvq->stats.bytes = 0;
 981                 rxvq->stats.errors = 0;
 982                 rxvq->stats.multicast = 0;
 983                 rxvq->stats.broadcast = 0;
 984                 memset(rxvq->stats.size_bins, 0,
 985                        sizeof(rxvq->stats.size_bins[0]) * 8);
 986         }
 987 }
 988
 989 static void
 990 virtio_set_hwaddr(struct virtio_hw *hw)
 991 {
 992         vtpci_write_dev_config(hw,
 993                         offsetof(struct virtio_net_config, mac),
 994                         &hw->mac_addr, ETHER_ADDR_LEN);
 995 }
 996
 997 static void
 998 virtio_get_hwaddr(struct virtio_hw *hw)
 999 {
1000         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1001                 vtpci_read_dev_config(hw,
1002                         offsetof(struct virtio_net_config, mac),
1003                         &hw->mac_addr, ETHER_ADDR_LEN);
1004         } else {
1005                 eth_random_addr(&hw->mac_addr[0]);
1006                 virtio_set_hwaddr(hw);
1007         }
1008 }
1009
1010 static int
1011 virtio_mac_table_set(struct virtio_hw *hw,
1012                      const struct virtio_net_ctrl_mac *uc,
1013                      const struct virtio_net_ctrl_mac *mc)
1014 {
1015         struct virtio_pmd_ctrl ctrl;
1016         int err, len[2];
1017
1018         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1019                 PMD_DRV_LOG(INFO, "host does not support mac table");
1020                 return -1;
1021         }
1022
1023         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1024         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1025
1026         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1027         memcpy(ctrl.data, uc, len[0]);
1028
1029         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1030         memcpy(ctrl.data + len[0], mc, len[1]);
1031
1032         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1033         if (err != 0)
1034                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1035         return err;
1036 }
1037
1038 static int
1039 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1040                     uint32_t index, uint32_t vmdq __rte_unused)
1041 {
1042         struct virtio_hw *hw = dev->data->dev_private;
1043         const struct ether_addr *addrs = dev->data->mac_addrs;
1044         unsigned int i;
1045         struct virtio_net_ctrl_mac *uc, *mc;
1046
1047         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1048                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1049                 return -EINVAL;
1050         }
1051
1052         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1053         uc->entries = 0;
1054         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1055         mc->entries = 0;
1056
1057         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1058                 const struct ether_addr *addr
1059                         = (i == index) ? mac_addr : addrs + i;
1060                 struct virtio_net_ctrl_mac *tbl
1061                         = is_multicast_ether_addr(addr) ? mc : uc;
1062
1063                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1064         }
1065
1066         return virtio_mac_table_set(hw, uc, mc);
1067 }
1068
1069 static void
1070 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1071 {
1072         struct virtio_hw *hw = dev->data->dev_private;
1073         struct ether_addr *addrs = dev->data->mac_addrs;
1074         struct virtio_net_ctrl_mac *uc, *mc;
1075         unsigned int i;
1076
1077         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1078                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1079                 return;
1080         }
1081
1082         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1083         uc->entries = 0;
1084         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1085         mc->entries = 0;
1086
1087         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1088                 struct virtio_net_ctrl_mac *tbl;
1089
1090                 if (i == index || is_zero_ether_addr(addrs + i))
1091                         continue;
1092
1093                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1094                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1095         }
1096
1097         virtio_mac_table_set(hw, uc, mc);
1098 }
1099
1100 static void
1101 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1102 {
1103         struct virtio_hw *hw = dev->data->dev_private;
1104
1105         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1106
1107         /* Use atomic update if available */
1108         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1109                 struct virtio_pmd_ctrl ctrl;
1110                 int len = ETHER_ADDR_LEN;
1111
1112                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1113                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1114
1115                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1116                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1117         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1118                 virtio_set_hwaddr(hw);
1119 }
1120
1121 static int
1122 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1123 {
1124         struct virtio_hw *hw = dev->data->dev_private;
1125         struct virtio_pmd_ctrl ctrl;
1126         int len;
1127
1128         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1129                 return -ENOTSUP;
1130
1131         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1132         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1133         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1134         len = sizeof(vlan_id);
1135
1136         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1137 }
1138
1139 static int
1140 virtio_intr_enable(struct rte_eth_dev *dev)
1141 {
1142         struct virtio_hw *hw = dev->data->dev_private;
1143
1144         if (rte_intr_enable(dev->intr_handle) < 0)
1145                 return -1;
1146
1147         if (!hw->virtio_user_dev)
1148                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1149
1150         return 0;
1151 }
1152
1153 static int
1154 virtio_intr_disable(struct rte_eth_dev *dev)
1155 {
1156         struct virtio_hw *hw = dev->data->dev_private;
1157
1158         if (rte_intr_disable(dev->intr_handle) < 0)
1159                 return -1;
1160
1161         if (!hw->virtio_user_dev)
1162                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1163
1164         return 0;
1165 }
1166
1167 static int
1168 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1169 {
1170         uint64_t host_features;
1171
1172         /* Prepare guest_features: feature that driver wants to support */
1173         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1174                 req_features);
1175
1176         /* Read device(host) feature bits */
1177         host_features = VTPCI_OPS(hw)->get_features(hw);
1178         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1179                 host_features);
1180
1181         /* If supported, ensure MTU value is valid before acknowledging it. */
1182         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1183                 struct virtio_net_config config;
1184
1185                 vtpci_read_dev_config(hw,
1186                         offsetof(struct virtio_net_config, mtu),
1187                         &config.mtu, sizeof(config.mtu));
1188
1189                 if (config.mtu < ETHER_MIN_MTU)
1190                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1191         }
1192
1193         /*
1194          * Negotiate features: Subset of device feature bits are written back
1195          * guest feature bits.
1196          */
1197         hw->guest_features = req_features;
1198         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1199         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1200                 hw->guest_features);
1201
1202         if (hw->modern) {
1203                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1204                         PMD_INIT_LOG(ERR,
1205                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1206                         return -1;
1207                 }
1208                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1209                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1210                         PMD_INIT_LOG(ERR,
1211                                 "failed to set FEATURES_OK status!");
1212                         return -1;
1213                 }
1214         }
1215
1216         hw->req_guest_features = req_features;
1217
1218         return 0;
1219 }
1220
1221 int
1222 virtio_dev_pause(struct rte_eth_dev *dev)
1223 {
1224         struct virtio_hw *hw = dev->data->dev_private;
1225
1226         rte_spinlock_lock(&hw->state_lock);
1227
1228         if (hw->started == 0) {
1229                 /* Device is just stopped. */
1230                 rte_spinlock_unlock(&hw->state_lock);
1231                 return -1;
1232         }
1233         hw->started = 0;
1234         /*
1235          * Prevent the worker threads from touching queues to avoid contention,
1236          * 1 ms should be enough for the ongoing Tx function to finish.
1237          */
1238         rte_delay_ms(1);
1239         return 0;
1240 }
1241
1242 /*
1243  * Recover hw state to let the worker threads continue.
1244  */
1245 void
1246 virtio_dev_resume(struct rte_eth_dev *dev)
1247 {
1248         struct virtio_hw *hw = dev->data->dev_private;
1249
1250         hw->started = 1;
1251         rte_spinlock_unlock(&hw->state_lock);
1252 }
1253
1254 /*
1255  * Should be called only after device is paused.
1256  */
1257 int
1258 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1259                 int nb_pkts)
1260 {
1261         struct virtio_hw *hw = dev->data->dev_private;
1262         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1263         int ret;
1264
1265         hw->inject_pkts = tx_pkts;
1266         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1267         hw->inject_pkts = NULL;
1268
1269         return ret;
1270 }
1271
1272 static void
1273 virtio_notify_peers(struct rte_eth_dev *dev)
1274 {
1275         struct virtio_hw *hw = dev->data->dev_private;
1276         struct virtnet_rx *rxvq = dev->data->rx_queues[0];
1277         struct rte_mbuf *rarp_mbuf;
1278
1279         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1280                         (struct ether_addr *)hw->mac_addr);
1281         if (rarp_mbuf == NULL) {
1282                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1283                 return;
1284         }
1285
1286         /* If virtio port just stopped, no need to send RARP */
1287         if (virtio_dev_pause(dev) < 0) {
1288                 rte_pktmbuf_free(rarp_mbuf);
1289                 return;
1290         }
1291
1292         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1293         virtio_dev_resume(dev);
1294 }
1295
1296 static void
1297 virtio_ack_link_announce(struct rte_eth_dev *dev)
1298 {
1299         struct virtio_hw *hw = dev->data->dev_private;
1300         struct virtio_pmd_ctrl ctrl;
1301
1302         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1303         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1304
1305         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1306 }
1307
1308 /*
1309  * Process virtio config changed interrupt. Call the callback
1310  * if link state changed, generate gratuitous RARP packet if
1311  * the status indicates an ANNOUNCE.
1312  */
1313 void
1314 virtio_interrupt_handler(void *param)
1315 {
1316         struct rte_eth_dev *dev = param;
1317         struct virtio_hw *hw = dev->data->dev_private;
1318         uint8_t isr;
1319
1320         /* Read interrupt status which clears interrupt */
1321         isr = vtpci_isr(hw);
1322         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1323
1324         if (virtio_intr_enable(dev) < 0)
1325                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1326
1327         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1328                 if (virtio_dev_link_update(dev, 0) == 0)
1329                         _rte_eth_dev_callback_process(dev,
1330                                                       RTE_ETH_EVENT_INTR_LSC,
1331                                                       NULL);
1332         }
1333
1334         if (isr & VIRTIO_NET_S_ANNOUNCE) {
1335                 virtio_notify_peers(dev);
1336                 virtio_ack_link_announce(dev);
1337         }
1338 }
1339
1340 /* set rx and tx handlers according to what is supported */
1341 static void
1342 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1343 {
1344         struct virtio_hw *hw = eth_dev->data->dev_private;
1345
1346         if (hw->use_simple_rx) {
1347                 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1348                         eth_dev->data->port_id);
1349                 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1350         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1351                 PMD_INIT_LOG(INFO,
1352                         "virtio: using mergeable buffer Rx path on port %u",
1353                         eth_dev->data->port_id);
1354                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1355         } else {
1356                 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1357                         eth_dev->data->port_id);
1358                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1359         }
1360
1361         if (hw->use_simple_tx) {
1362                 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1363                         eth_dev->data->port_id);
1364                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1365         } else {
1366                 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1367                         eth_dev->data->port_id);
1368                 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1369         }
1370 }
1371
1372 /* Only support 1:1 queue/interrupt mapping so far.
1373  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1374  * interrupt vectors (<N+1).
1375  */
1376 static int
1377 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1378 {
1379         uint32_t i;
1380         struct virtio_hw *hw = dev->data->dev_private;
1381
1382         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1383         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1384                 dev->intr_handle->intr_vec[i] = i + 1;
1385                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1386                                                  VIRTIO_MSI_NO_VECTOR) {
1387                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1388                         return -EBUSY;
1389                 }
1390         }
1391
1392         return 0;
1393 }
1394
1395 static void
1396 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1397 {
1398         uint32_t i;
1399         struct virtio_hw *hw = dev->data->dev_private;
1400
1401         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1402         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1403                 VTPCI_OPS(hw)->set_queue_irq(hw,
1404                                              hw->vqs[i * VTNET_CQ],
1405                                              VIRTIO_MSI_NO_VECTOR);
1406 }
1407
1408 static int
1409 virtio_configure_intr(struct rte_eth_dev *dev)
1410 {
1411         struct virtio_hw *hw = dev->data->dev_private;
1412
1413         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1414                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1415                 return -ENOTSUP;
1416         }
1417
1418         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1419                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1420                 return -1;
1421         }
1422
1423         if (!dev->intr_handle->intr_vec) {
1424                 dev->intr_handle->intr_vec =
1425                         rte_zmalloc("intr_vec",
1426                                     hw->max_queue_pairs * sizeof(int), 0);
1427                 if (!dev->intr_handle->intr_vec) {
1428                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1429                                      hw->max_queue_pairs);
1430                         return -ENOMEM;
1431                 }
1432         }
1433
1434         /* Re-register callback to update max_intr */
1435         rte_intr_callback_unregister(dev->intr_handle,
1436                                      virtio_interrupt_handler,
1437                                      dev);
1438         rte_intr_callback_register(dev->intr_handle,
1439                                    virtio_interrupt_handler,
1440                                    dev);
1441
1442         /* DO NOT try to remove this! This function will enable msix, or QEMU
1443          * will encounter SIGSEGV when DRIVER_OK is sent.
1444          * And for legacy devices, this should be done before queue/vec binding
1445          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1446          * (22) will be ignored.
1447          */
1448         if (virtio_intr_enable(dev) < 0) {
1449                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1450                 return -1;
1451         }
1452
1453         if (virtio_queues_bind_intr(dev) < 0) {
1454                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1455                 return -1;
1456         }
1457
1458         return 0;
1459 }
1460
1461 /* reset device and renegotiate features if needed */
1462 static int
1463 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1464 {
1465         struct virtio_hw *hw = eth_dev->data->dev_private;
1466         struct virtio_net_config *config;
1467         struct virtio_net_config local_config;
1468         struct rte_pci_device *pci_dev = NULL;
1469         int ret;
1470
1471         /* Reset the device although not necessary at startup */
1472         vtpci_reset(hw);
1473
1474         if (hw->vqs) {
1475                 virtio_dev_free_mbufs(eth_dev);
1476                 virtio_free_queues(hw);
1477         }
1478
1479         /* Tell the host we've noticed this device. */
1480         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1481
1482         /* Tell the host we've known how to drive the device. */
1483         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1484         if (virtio_negotiate_features(hw, req_features) < 0)
1485                 return -1;
1486
1487         if (!hw->virtio_user_dev) {
1488                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1489                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1490         }
1491
1492         /* If host does not support both status and MSI-X then disable LSC */
1493         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1494             hw->use_msix != VIRTIO_MSIX_NONE)
1495                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1496         else
1497                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1498
1499         /* Setting up rx_header size for the device */
1500         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1501             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1502                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1503         else
1504                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1505
1506         /* Copy the permanent MAC address to: virtio_hw */
1507         virtio_get_hwaddr(hw);
1508         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1509                         &eth_dev->data->mac_addrs[0]);
1510         PMD_INIT_LOG(DEBUG,
1511                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1512                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1513                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1514
1515         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1516                 config = &local_config;
1517
1518                 vtpci_read_dev_config(hw,
1519                         offsetof(struct virtio_net_config, mac),
1520                         &config->mac, sizeof(config->mac));
1521
1522                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1523                         vtpci_read_dev_config(hw,
1524                                 offsetof(struct virtio_net_config, status),
1525                                 &config->status, sizeof(config->status));
1526                 } else {
1527                         PMD_INIT_LOG(DEBUG,
1528                                      "VIRTIO_NET_F_STATUS is not supported");
1529                         config->status = 0;
1530                 }
1531
1532                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1533                         vtpci_read_dev_config(hw,
1534                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1535                                 &config->max_virtqueue_pairs,
1536                                 sizeof(config->max_virtqueue_pairs));
1537                 } else {
1538                         PMD_INIT_LOG(DEBUG,
1539                                      "VIRTIO_NET_F_MQ is not supported");
1540                         config->max_virtqueue_pairs = 1;
1541                 }
1542
1543                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1544
1545                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1546                         vtpci_read_dev_config(hw,
1547                                 offsetof(struct virtio_net_config, mtu),
1548                                 &config->mtu,
1549                                 sizeof(config->mtu));
1550
1551                         /*
1552                          * MTU value has already been checked at negotiation
1553                          * time, but check again in case it has changed since
1554                          * then, which should not happen.
1555                          */
1556                         if (config->mtu < ETHER_MIN_MTU) {
1557                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1558                                                 config->mtu);
1559                                 return -1;
1560                         }
1561
1562                         hw->max_mtu = config->mtu;
1563                         /* Set initial MTU to maximum one supported by vhost */
1564                         eth_dev->data->mtu = config->mtu;
1565
1566                 } else {
1567                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1568                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1569                 }
1570
1571                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1572                                 config->max_virtqueue_pairs);
1573                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1574                 PMD_INIT_LOG(DEBUG,
1575                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1576                                 config->mac[0], config->mac[1],
1577                                 config->mac[2], config->mac[3],
1578                                 config->mac[4], config->mac[5]);
1579         } else {
1580                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1581                 hw->max_queue_pairs = 1;
1582                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1583                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1584         }
1585
1586         ret = virtio_alloc_queues(eth_dev);
1587         if (ret < 0)
1588                 return ret;
1589
1590         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1591                 if (virtio_configure_intr(eth_dev) < 0) {
1592                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1593                         return -1;
1594                 }
1595         }
1596
1597         vtpci_reinit_complete(hw);
1598
1599         if (pci_dev)
1600                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1601                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1602                         pci_dev->id.device_id);
1603
1604         return 0;
1605 }
1606
1607 /*
1608  * Remap the PCI device again (IO port map for legacy device and
1609  * memory map for modern device), so that the secondary process
1610  * could have the PCI initiated correctly.
1611  */
1612 static int
1613 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1614 {
1615         if (hw->modern) {
1616                 /*
1617                  * We don't have to re-parse the PCI config space, since
1618                  * rte_pci_map_device() makes sure the mapped address
1619                  * in secondary process would equal to the one mapped in
1620                  * the primary process: error will be returned if that
1621                  * requirement is not met.
1622                  *
1623                  * That said, we could simply reuse all cap pointers
1624                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1625                  * primary process, which is stored in shared memory.
1626                  */
1627                 if (rte_pci_map_device(pci_dev)) {
1628                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1629                         return -1;
1630                 }
1631         } else {
1632                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1633                         return -1;
1634         }
1635
1636         return 0;
1637 }
1638
1639 static void
1640 virtio_set_vtpci_ops(struct virtio_hw *hw)
1641 {
1642 #ifdef RTE_VIRTIO_USER
1643         if (hw->virtio_user_dev)
1644                 VTPCI_OPS(hw) = &virtio_user_ops;
1645         else
1646 #endif
1647         if (hw->modern)
1648                 VTPCI_OPS(hw) = &modern_ops;
1649         else
1650                 VTPCI_OPS(hw) = &legacy_ops;
1651 }
1652
1653 /*
1654  * This function is based on probe() function in virtio_pci.c
1655  * It returns 0 on success.
1656  */
1657 int
1658 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1659 {
1660         struct virtio_hw *hw = eth_dev->data->dev_private;
1661         int ret;
1662
1663         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1664
1665         eth_dev->dev_ops = &virtio_eth_dev_ops;
1666
1667         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1668                 if (!hw->virtio_user_dev) {
1669                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1670                         if (ret)
1671                                 return ret;
1672                 }
1673
1674                 virtio_set_vtpci_ops(hw);
1675                 set_rxtx_funcs(eth_dev);
1676
1677                 return 0;
1678         }
1679
1680         /* Allocate memory for storing MAC addresses */
1681         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1682         if (eth_dev->data->mac_addrs == NULL) {
1683                 PMD_INIT_LOG(ERR,
1684                         "Failed to allocate %d bytes needed to store MAC addresses",
1685                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1686                 return -ENOMEM;
1687         }
1688
1689         hw->port_id = eth_dev->data->port_id;
1690         /* For virtio_user case the hw->virtio_user_dev is populated by
1691          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1692          */
1693         if (!hw->virtio_user_dev) {
1694                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1695                 if (ret)
1696                         goto out;
1697         }
1698
1699         /* reset device and negotiate default features */
1700         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1701         if (ret < 0)
1702                 goto out;
1703
1704         /* Setup interrupt callback  */
1705         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1706                 rte_intr_callback_register(eth_dev->intr_handle,
1707                         virtio_interrupt_handler, eth_dev);
1708
1709         return 0;
1710
1711 out:
1712         rte_free(eth_dev->data->mac_addrs);
1713         return ret;
1714 }
1715
1716 static int
1717 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1718 {
1719         PMD_INIT_FUNC_TRACE();
1720
1721         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1722                 return -EPERM;
1723
1724         virtio_dev_stop(eth_dev);
1725         virtio_dev_close(eth_dev);
1726
1727         eth_dev->dev_ops = NULL;
1728         eth_dev->tx_pkt_burst = NULL;
1729         eth_dev->rx_pkt_burst = NULL;
1730
1731         rte_free(eth_dev->data->mac_addrs);
1732         eth_dev->data->mac_addrs = NULL;
1733
1734         /* reset interrupt callback  */
1735         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1736                 rte_intr_callback_unregister(eth_dev->intr_handle,
1737                                                 virtio_interrupt_handler,
1738                                                 eth_dev);
1739         if (eth_dev->device)
1740                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1741
1742         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1743
1744         return 0;
1745 }
1746
1747 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1748         struct rte_pci_device *pci_dev)
1749 {
1750         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1751                 eth_virtio_dev_init);
1752 }
1753
1754 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1755 {
1756         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1757 }
1758
1759 static struct rte_pci_driver rte_virtio_pmd = {
1760         .driver = {
1761                 .name = "net_virtio",
1762         },
1763         .id_table = pci_id_virtio_map,
1764         .drv_flags = 0,
1765         .probe = eth_virtio_pci_probe,
1766         .remove = eth_virtio_pci_remove,
1767 };
1768
1769 RTE_INIT(rte_virtio_pmd_init);
1770 static void
1771 rte_virtio_pmd_init(void)
1772 {
1773         if (rte_eal_iopl_init() != 0) {
1774                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1775                 return;
1776         }
1777
1778         rte_pci_register(&rte_virtio_pmd);
1779 }
1780
1781 /*
1782  * Configure virtio device
1783  * It returns 0 on success.
1784  */
1785 static int
1786 virtio_dev_configure(struct rte_eth_dev *dev)
1787 {
1788         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1789         struct virtio_hw *hw = dev->data->dev_private;
1790         uint64_t req_features;
1791         int ret;
1792
1793         PMD_INIT_LOG(DEBUG, "configure");
1794         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1795
1796         if (dev->data->dev_conf.intr_conf.rxq) {
1797                 ret = virtio_init_device(dev, hw->req_guest_features);
1798                 if (ret < 0)
1799                         return ret;
1800         }
1801
1802         /* The name hw_ip_checksum is a bit confusing since it can be
1803          * set by the application to request L3 and/or L4 checksums. In
1804          * case of virtio, only L4 checksum is supported.
1805          */
1806         if (rxmode->hw_ip_checksum)
1807                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1808
1809         if (rxmode->enable_lro)
1810                 req_features |=
1811                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1812                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1813
1814         /* if request features changed, reinit the device */
1815         if (req_features != hw->req_guest_features) {
1816                 ret = virtio_init_device(dev, req_features);
1817                 if (ret < 0)
1818                         return ret;
1819         }
1820
1821         if (rxmode->hw_ip_checksum &&
1822                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1823                 PMD_DRV_LOG(ERR,
1824                         "rx checksum not available on this host");
1825                 return -ENOTSUP;
1826         }
1827
1828         if (rxmode->enable_lro &&
1829                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1830                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
1831                 PMD_DRV_LOG(ERR,
1832                         "Large Receive Offload not available on this host");
1833                 return -ENOTSUP;
1834         }
1835
1836         /* start control queue */
1837         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1838                 virtio_dev_cq_start(dev);
1839
1840         hw->vlan_strip = rxmode->hw_vlan_strip;
1841
1842         if (rxmode->hw_vlan_filter
1843             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1844                 PMD_DRV_LOG(ERR,
1845                             "vlan filtering not available on this host");
1846                 return -ENOTSUP;
1847         }
1848
1849         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1850                 /* Enable vector (0) for Link State Intrerrupt */
1851                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1852                                 VIRTIO_MSI_NO_VECTOR) {
1853                         PMD_DRV_LOG(ERR, "failed to set config vector");
1854                         return -EBUSY;
1855                 }
1856
1857         rte_spinlock_init(&hw->state_lock);
1858
1859         hw->use_simple_rx = 1;
1860         hw->use_simple_tx = 1;
1861
1862 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
1863         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1864                 hw->use_simple_rx = 0;
1865                 hw->use_simple_tx = 0;
1866         }
1867 #endif
1868         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1869                 hw->use_simple_rx = 0;
1870                 hw->use_simple_tx = 0;
1871         }
1872
1873         if (rxmode->hw_ip_checksum)
1874                 hw->use_simple_rx = 0;
1875
1876         return 0;
1877 }
1878
1879
1880 static int
1881 virtio_dev_start(struct rte_eth_dev *dev)
1882 {
1883         uint16_t nb_queues, i;
1884         struct virtnet_rx *rxvq;
1885         struct virtnet_tx *txvq __rte_unused;
1886         struct virtio_hw *hw = dev->data->dev_private;
1887         int ret;
1888
1889         /* Finish the initialization of the queues */
1890         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1891                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1892                 if (ret < 0)
1893                         return ret;
1894         }
1895         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1896                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1897                 if (ret < 0)
1898                         return ret;
1899         }
1900
1901         /* check if lsc interrupt feature is enabled */
1902         if (dev->data->dev_conf.intr_conf.lsc) {
1903                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1904                         PMD_DRV_LOG(ERR, "link status not supported by host");
1905                         return -ENOTSUP;
1906                 }
1907         }
1908
1909         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1910          * in device configure, but it could be unmapped  when device is
1911          * stopped.
1912          */
1913         if (dev->data->dev_conf.intr_conf.lsc ||
1914             dev->data->dev_conf.intr_conf.rxq) {
1915                 virtio_intr_disable(dev);
1916
1917                 if (virtio_intr_enable(dev) < 0) {
1918                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1919                         return -EIO;
1920                 }
1921         }
1922
1923         /*Notify the backend
1924          *Otherwise the tap backend might already stop its queue due to fullness.
1925          *vhost backend will have no chance to be waked up
1926          */
1927         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1928         if (hw->max_queue_pairs > 1) {
1929                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1930                         return -EINVAL;
1931         }
1932
1933         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1934
1935         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1936                 rxvq = dev->data->rx_queues[i];
1937                 /* Flush the old packets */
1938                 virtqueue_rxvq_flush(rxvq->vq);
1939                 virtqueue_notify(rxvq->vq);
1940         }
1941
1942         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1943                 txvq = dev->data->tx_queues[i];
1944                 virtqueue_notify(txvq->vq);
1945         }
1946
1947         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1948
1949         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1950                 rxvq = dev->data->rx_queues[i];
1951                 VIRTQUEUE_DUMP(rxvq->vq);
1952         }
1953
1954         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1955                 txvq = dev->data->tx_queues[i];
1956                 VIRTQUEUE_DUMP(txvq->vq);
1957         }
1958
1959         set_rxtx_funcs(dev);
1960         hw->started = 1;
1961
1962         /* Initialize Link state */
1963         virtio_dev_link_update(dev, 0);
1964
1965         return 0;
1966 }
1967
1968 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1969 {
1970         struct rte_mbuf *buf;
1971         int i, mbuf_num = 0;
1972
1973         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1974                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1975
1976                 if (rxvq == NULL || rxvq->vq == NULL)
1977                         continue;
1978
1979                 PMD_INIT_LOG(DEBUG,
1980                              "Before freeing rxq[%d] used and unused buf", i);
1981                 VIRTQUEUE_DUMP(rxvq->vq);
1982
1983                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1984                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1985                         rte_pktmbuf_free(buf);
1986                         mbuf_num++;
1987                 }
1988
1989                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1990                 PMD_INIT_LOG(DEBUG,
1991                              "After freeing rxq[%d] used and unused buf", i);
1992                 VIRTQUEUE_DUMP(rxvq->vq);
1993         }
1994
1995         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1996                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1997
1998                 if (txvq == NULL || txvq->vq == NULL)
1999                         continue;
2000
2001                 PMD_INIT_LOG(DEBUG,
2002                              "Before freeing txq[%d] used and unused bufs",
2003                              i);
2004                 VIRTQUEUE_DUMP(txvq->vq);
2005
2006                 mbuf_num = 0;
2007                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
2008                         rte_pktmbuf_free(buf);
2009                         mbuf_num++;
2010                 }
2011
2012                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
2013                 PMD_INIT_LOG(DEBUG,
2014                              "After freeing txq[%d] used and unused buf", i);
2015                 VIRTQUEUE_DUMP(txvq->vq);
2016         }
2017 }
2018
2019 /*
2020  * Stop device: disable interrupt and mark link down
2021  */
2022 static void
2023 virtio_dev_stop(struct rte_eth_dev *dev)
2024 {
2025         struct virtio_hw *hw = dev->data->dev_private;
2026         struct rte_eth_link link;
2027         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2028
2029         PMD_INIT_LOG(DEBUG, "stop");
2030
2031         rte_spinlock_lock(&hw->state_lock);
2032         if (intr_conf->lsc || intr_conf->rxq)
2033                 virtio_intr_disable(dev);
2034
2035         hw->started = 0;
2036         memset(&link, 0, sizeof(link));
2037         virtio_dev_atomic_write_link_status(dev, &link);
2038         rte_spinlock_unlock(&hw->state_lock);
2039 }
2040
2041 static int
2042 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2043 {
2044         struct rte_eth_link link, old;
2045         uint16_t status;
2046         struct virtio_hw *hw = dev->data->dev_private;
2047         memset(&link, 0, sizeof(link));
2048         virtio_dev_atomic_read_link_status(dev, &link);
2049         old = link;
2050         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2051         link.link_speed  = ETH_SPEED_NUM_10G;
2052
2053         if (hw->started == 0) {
2054                 link.link_status = ETH_LINK_DOWN;
2055         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2056                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2057                 vtpci_read_dev_config(hw,
2058                                 offsetof(struct virtio_net_config, status),
2059                                 &status, sizeof(status));
2060                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2061                         link.link_status = ETH_LINK_DOWN;
2062                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2063                                      dev->data->port_id);
2064                 } else {
2065                         link.link_status = ETH_LINK_UP;
2066                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2067                                      dev->data->port_id);
2068                 }
2069         } else {
2070                 link.link_status = ETH_LINK_UP;
2071         }
2072         virtio_dev_atomic_write_link_status(dev, &link);
2073
2074         return (old.link_status == link.link_status) ? -1 : 0;
2075 }
2076
2077 static int
2078 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2079 {
2080         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2081         struct virtio_hw *hw = dev->data->dev_private;
2082
2083         if (mask & ETH_VLAN_FILTER_MASK) {
2084                 if (rxmode->hw_vlan_filter &&
2085                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2086
2087                         PMD_DRV_LOG(NOTICE,
2088                                 "vlan filtering not available on this host");
2089
2090                         return -ENOTSUP;
2091                 }
2092         }
2093
2094         if (mask & ETH_VLAN_STRIP_MASK)
2095                 hw->vlan_strip = rxmode->hw_vlan_strip;
2096
2097         return 0;
2098 }
2099
2100 static void
2101 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2102 {
2103         uint64_t tso_mask, host_features;
2104         struct virtio_hw *hw = dev->data->dev_private;
2105
2106         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2107
2108         dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL;
2109         dev_info->max_rx_queues =
2110                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2111         dev_info->max_tx_queues =
2112                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2113         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2114         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2115         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2116         dev_info->default_txconf = (struct rte_eth_txconf) {
2117                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
2118         };
2119
2120         host_features = VTPCI_OPS(hw)->get_features(hw);
2121         dev_info->rx_offload_capa = 0;
2122         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2123                 dev_info->rx_offload_capa |=
2124                         DEV_RX_OFFLOAD_TCP_CKSUM |
2125                         DEV_RX_OFFLOAD_UDP_CKSUM;
2126         }
2127         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2128                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2129         if ((host_features & tso_mask) == tso_mask)
2130                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2131
2132         dev_info->tx_offload_capa = 0;
2133         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2134                 dev_info->tx_offload_capa |=
2135                         DEV_TX_OFFLOAD_UDP_CKSUM |
2136                         DEV_TX_OFFLOAD_TCP_CKSUM;
2137         }
2138         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2139                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2140         if ((hw->guest_features & tso_mask) == tso_mask)
2141                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2142 }
2143
2144 /*
2145  * It enables testpmd to collect per queue stats.
2146  */
2147 static int
2148 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2149 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2150 __rte_unused uint8_t is_rx)
2151 {
2152         return 0;
2153 }
2154
2155 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2156 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2157 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2158
2159 RTE_INIT(virtio_init_log);
2160 static void
2161 virtio_init_log(void)
2162 {
2163         virtio_logtype_init = rte_log_register("pmd.virtio.init");
2164         if (virtio_logtype_init >= 0)
2165                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2166         virtio_logtype_driver = rte_log_register("pmd.virtio.driver");
2167         if (virtio_logtype_driver >= 0)
2168                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2169 }