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_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, RTE_MEMZONE_IOVA_CONTIG,
 396                         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, RTE_MEMZONE_IOVA_CONTIG,
 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 void
 778 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 779 {
 780         unsigned i;
 781
 782         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 783                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 784                 if (txvq == NULL)
 785                         continue;
 786
 787                 stats->opackets += txvq->stats.packets;
 788                 stats->obytes += txvq->stats.bytes;
 789                 stats->oerrors += txvq->stats.errors;
 790
 791                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 792                         stats->q_opackets[i] = txvq->stats.packets;
 793                         stats->q_obytes[i] = txvq->stats.bytes;
 794                 }
 795         }
 796
 797         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 798                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 799                 if (rxvq == NULL)
 800                         continue;
 801
 802                 stats->ipackets += rxvq->stats.packets;
 803                 stats->ibytes += rxvq->stats.bytes;
 804                 stats->ierrors += rxvq->stats.errors;
 805
 806                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 807                         stats->q_ipackets[i] = rxvq->stats.packets;
 808                         stats->q_ibytes[i] = rxvq->stats.bytes;
 809                 }
 810         }
 811
 812         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 813 }
 814
 815 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 816                                        struct rte_eth_xstat_name *xstats_names,
 817                                        __rte_unused unsigned limit)
 818 {
 819         unsigned i;
 820         unsigned count = 0;
 821         unsigned t;
 822
 823         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 824                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 825
 826         if (xstats_names != NULL) {
 827                 /* Note: limit checked in rte_eth_xstats_names() */
 828
 829                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 830                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 831                         if (rxvq == NULL)
 832                                 continue;
 833                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 834                                 snprintf(xstats_names[count].name,
 835                                         sizeof(xstats_names[count].name),
 836                                         "rx_q%u_%s", i,
 837                                         rte_virtio_rxq_stat_strings[t].name);
 838                                 count++;
 839                         }
 840                 }
 841
 842                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 843                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
 844                         if (txvq == NULL)
 845                                 continue;
 846                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 847                                 snprintf(xstats_names[count].name,
 848                                         sizeof(xstats_names[count].name),
 849                                         "tx_q%u_%s", i,
 850                                         rte_virtio_txq_stat_strings[t].name);
 851                                 count++;
 852                         }
 853                 }
 854                 return count;
 855         }
 856         return nstats;
 857 }
 858
 859 static int
 860 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 861                       unsigned n)
 862 {
 863         unsigned i;
 864         unsigned count = 0;
 865
 866         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 867                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 868
 869         if (n < nstats)
 870                 return nstats;
 871
 872         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 873                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 874
 875                 if (rxvq == NULL)
 876                         continue;
 877
 878                 unsigned t;
 879
 880                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 881                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 882                                 rte_virtio_rxq_stat_strings[t].offset);
 883                         xstats[count].id = count;
 884                         count++;
 885                 }
 886         }
 887
 888         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 889                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 890
 891                 if (txvq == NULL)
 892                         continue;
 893
 894                 unsigned t;
 895
 896                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 897                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 898                                 rte_virtio_txq_stat_strings[t].offset);
 899                         xstats[count].id = count;
 900                         count++;
 901                 }
 902         }
 903
 904         return count;
 905 }
 906
 907 static int
 908 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 909 {
 910         virtio_update_stats(dev, stats);
 911
 912         return 0;
 913 }
 914
 915 static void
 916 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 917 {
 918         unsigned int i;
 919
 920         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 921                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 922                 if (txvq == NULL)
 923                         continue;
 924
 925                 txvq->stats.packets = 0;
 926                 txvq->stats.bytes = 0;
 927                 txvq->stats.errors = 0;
 928                 txvq->stats.multicast = 0;
 929                 txvq->stats.broadcast = 0;
 930                 memset(txvq->stats.size_bins, 0,
 931                        sizeof(txvq->stats.size_bins[0]) * 8);
 932         }
 933
 934         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 935                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 936                 if (rxvq == NULL)
 937                         continue;
 938
 939                 rxvq->stats.packets = 0;
 940                 rxvq->stats.bytes = 0;
 941                 rxvq->stats.errors = 0;
 942                 rxvq->stats.multicast = 0;
 943                 rxvq->stats.broadcast = 0;
 944                 memset(rxvq->stats.size_bins, 0,
 945                        sizeof(rxvq->stats.size_bins[0]) * 8);
 946         }
 947 }
 948
 949 static void
 950 virtio_set_hwaddr(struct virtio_hw *hw)
 951 {
 952         vtpci_write_dev_config(hw,
 953                         offsetof(struct virtio_net_config, mac),
 954                         &hw->mac_addr, ETHER_ADDR_LEN);
 955 }
 956
 957 static void
 958 virtio_get_hwaddr(struct virtio_hw *hw)
 959 {
 960         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 961                 vtpci_read_dev_config(hw,
 962                         offsetof(struct virtio_net_config, mac),
 963                         &hw->mac_addr, ETHER_ADDR_LEN);
 964         } else {
 965                 eth_random_addr(&hw->mac_addr[0]);
 966                 virtio_set_hwaddr(hw);
 967         }
 968 }
 969
 970 static int
 971 virtio_mac_table_set(struct virtio_hw *hw,
 972                      const struct virtio_net_ctrl_mac *uc,
 973                      const struct virtio_net_ctrl_mac *mc)
 974 {
 975         struct virtio_pmd_ctrl ctrl;
 976         int err, len[2];
 977
 978         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 979                 PMD_DRV_LOG(INFO, "host does not support mac table");
 980                 return -1;
 981         }
 982
 983         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 984         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 985
 986         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 987         memcpy(ctrl.data, uc, len[0]);
 988
 989         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 990         memcpy(ctrl.data + len[0], mc, len[1]);
 991
 992         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 993         if (err != 0)
 994                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 995         return err;
 996 }
 997
 998 static int
 999 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1000                     uint32_t index, uint32_t vmdq __rte_unused)
1001 {
1002         struct virtio_hw *hw = dev->data->dev_private;
1003         const struct ether_addr *addrs = dev->data->mac_addrs;
1004         unsigned int i;
1005         struct virtio_net_ctrl_mac *uc, *mc;
1006
1007         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1008                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1009                 return -EINVAL;
1010         }
1011
1012         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1013         uc->entries = 0;
1014         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1015         mc->entries = 0;
1016
1017         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1018                 const struct ether_addr *addr
1019                         = (i == index) ? mac_addr : addrs + i;
1020                 struct virtio_net_ctrl_mac *tbl
1021                         = is_multicast_ether_addr(addr) ? mc : uc;
1022
1023                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1024         }
1025
1026         return virtio_mac_table_set(hw, uc, mc);
1027 }
1028
1029 static void
1030 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1031 {
1032         struct virtio_hw *hw = dev->data->dev_private;
1033         struct ether_addr *addrs = dev->data->mac_addrs;
1034         struct virtio_net_ctrl_mac *uc, *mc;
1035         unsigned int i;
1036
1037         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1038                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1039                 return;
1040         }
1041
1042         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1043         uc->entries = 0;
1044         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1045         mc->entries = 0;
1046
1047         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1048                 struct virtio_net_ctrl_mac *tbl;
1049
1050                 if (i == index || is_zero_ether_addr(addrs + i))
1051                         continue;
1052
1053                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1054                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1055         }
1056
1057         virtio_mac_table_set(hw, uc, mc);
1058 }
1059
1060 static int
1061 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1062 {
1063         struct virtio_hw *hw = dev->data->dev_private;
1064
1065         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1066
1067         /* Use atomic update if available */
1068         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1069                 struct virtio_pmd_ctrl ctrl;
1070                 int len = ETHER_ADDR_LEN;
1071
1072                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1073                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1074
1075                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1076                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1077         }
1078
1079         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1080                 return -ENOTSUP;
1081
1082         virtio_set_hwaddr(hw);
1083         return 0;
1084 }
1085
1086 static int
1087 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1088 {
1089         struct virtio_hw *hw = dev->data->dev_private;
1090         struct virtio_pmd_ctrl ctrl;
1091         int len;
1092
1093         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1094                 return -ENOTSUP;
1095
1096         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1097         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1098         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1099         len = sizeof(vlan_id);
1100
1101         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1102 }
1103
1104 static int
1105 virtio_intr_enable(struct rte_eth_dev *dev)
1106 {
1107         struct virtio_hw *hw = dev->data->dev_private;
1108
1109         if (rte_intr_enable(dev->intr_handle) < 0)
1110                 return -1;
1111
1112         if (!hw->virtio_user_dev)
1113                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1114
1115         return 0;
1116 }
1117
1118 static int
1119 virtio_intr_disable(struct rte_eth_dev *dev)
1120 {
1121         struct virtio_hw *hw = dev->data->dev_private;
1122
1123         if (rte_intr_disable(dev->intr_handle) < 0)
1124                 return -1;
1125
1126         if (!hw->virtio_user_dev)
1127                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1128
1129         return 0;
1130 }
1131
1132 static int
1133 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1134 {
1135         uint64_t host_features;
1136
1137         /* Prepare guest_features: feature that driver wants to support */
1138         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1139                 req_features);
1140
1141         /* Read device(host) feature bits */
1142         host_features = VTPCI_OPS(hw)->get_features(hw);
1143         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1144                 host_features);
1145
1146         /* If supported, ensure MTU value is valid before acknowledging it. */
1147         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1148                 struct virtio_net_config config;
1149
1150                 vtpci_read_dev_config(hw,
1151                         offsetof(struct virtio_net_config, mtu),
1152                         &config.mtu, sizeof(config.mtu));
1153
1154                 if (config.mtu < ETHER_MIN_MTU)
1155                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1156         }
1157
1158         /*
1159          * Negotiate features: Subset of device feature bits are written back
1160          * guest feature bits.
1161          */
1162         hw->guest_features = req_features;
1163         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1164         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1165                 hw->guest_features);
1166
1167         if (hw->modern) {
1168                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1169                         PMD_INIT_LOG(ERR,
1170                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1171                         return -1;
1172                 }
1173                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1174                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1175                         PMD_INIT_LOG(ERR,
1176                                 "failed to set FEATURES_OK status!");
1177                         return -1;
1178                 }
1179         }
1180
1181         hw->req_guest_features = req_features;
1182
1183         return 0;
1184 }
1185
1186 int
1187 virtio_dev_pause(struct rte_eth_dev *dev)
1188 {
1189         struct virtio_hw *hw = dev->data->dev_private;
1190
1191         rte_spinlock_lock(&hw->state_lock);
1192
1193         if (hw->started == 0) {
1194                 /* Device is just stopped. */
1195                 rte_spinlock_unlock(&hw->state_lock);
1196                 return -1;
1197         }
1198         hw->started = 0;
1199         /*
1200          * Prevent the worker threads from touching queues to avoid contention,
1201          * 1 ms should be enough for the ongoing Tx function to finish.
1202          */
1203         rte_delay_ms(1);
1204         return 0;
1205 }
1206
1207 /*
1208  * Recover hw state to let the worker threads continue.
1209  */
1210 void
1211 virtio_dev_resume(struct rte_eth_dev *dev)
1212 {
1213         struct virtio_hw *hw = dev->data->dev_private;
1214
1215         hw->started = 1;
1216         rte_spinlock_unlock(&hw->state_lock);
1217 }
1218
1219 /*
1220  * Should be called only after device is paused.
1221  */
1222 int
1223 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1224                 int nb_pkts)
1225 {
1226         struct virtio_hw *hw = dev->data->dev_private;
1227         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1228         int ret;
1229
1230         hw->inject_pkts = tx_pkts;
1231         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1232         hw->inject_pkts = NULL;
1233
1234         return ret;
1235 }
1236
1237 static void
1238 virtio_notify_peers(struct rte_eth_dev *dev)
1239 {
1240         struct virtio_hw *hw = dev->data->dev_private;
1241         struct virtnet_rx *rxvq;
1242         struct rte_mbuf *rarp_mbuf;
1243
1244         if (!dev->data->rx_queues)
1245                 return;
1246
1247         rxvq = dev->data->rx_queues[0];
1248         if (!rxvq)
1249                 return;
1250
1251         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1252                         (struct ether_addr *)hw->mac_addr);
1253         if (rarp_mbuf == NULL) {
1254                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1255                 return;
1256         }
1257
1258         /* If virtio port just stopped, no need to send RARP */
1259         if (virtio_dev_pause(dev) < 0) {
1260                 rte_pktmbuf_free(rarp_mbuf);
1261                 return;
1262         }
1263
1264         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1265         virtio_dev_resume(dev);
1266 }
1267
1268 static void
1269 virtio_ack_link_announce(struct rte_eth_dev *dev)
1270 {
1271         struct virtio_hw *hw = dev->data->dev_private;
1272         struct virtio_pmd_ctrl ctrl;
1273
1274         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1275         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1276
1277         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1278 }
1279
1280 /*
1281  * Process virtio config changed interrupt. Call the callback
1282  * if link state changed, generate gratuitous RARP packet if
1283  * the status indicates an ANNOUNCE.
1284  */
1285 void
1286 virtio_interrupt_handler(void *param)
1287 {
1288         struct rte_eth_dev *dev = param;
1289         struct virtio_hw *hw = dev->data->dev_private;
1290         uint8_t isr;
1291
1292         /* Read interrupt status which clears interrupt */
1293         isr = vtpci_isr(hw);
1294         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1295
1296         if (virtio_intr_enable(dev) < 0)
1297                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1298
1299         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1300                 if (virtio_dev_link_update(dev, 0) == 0)
1301                         _rte_eth_dev_callback_process(dev,
1302                                                       RTE_ETH_EVENT_INTR_LSC,
1303                                                       NULL);
1304         }
1305
1306         if (isr & VIRTIO_NET_S_ANNOUNCE) {
1307                 virtio_notify_peers(dev);
1308                 if (hw->cvq)
1309                         virtio_ack_link_announce(dev);
1310         }
1311 }
1312
1313 /* set rx and tx handlers according to what is supported */
1314 static void
1315 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1316 {
1317         struct virtio_hw *hw = eth_dev->data->dev_private;
1318
1319         if (hw->use_simple_rx) {
1320                 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1321                         eth_dev->data->port_id);
1322                 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1323         } else if (hw->use_inorder_rx) {
1324                 PMD_INIT_LOG(INFO,
1325                         "virtio: using inorder mergeable buffer Rx path on port %u",
1326                         eth_dev->data->port_id);
1327                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts_inorder;
1328         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1329                 PMD_INIT_LOG(INFO,
1330                         "virtio: using mergeable buffer Rx path on port %u",
1331                         eth_dev->data->port_id);
1332                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1333         } else {
1334                 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1335                         eth_dev->data->port_id);
1336                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1337         }
1338
1339         if (hw->use_inorder_tx) {
1340                 PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1341                         eth_dev->data->port_id);
1342                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1343         } else {
1344                 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1345                         eth_dev->data->port_id);
1346                 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1347         }
1348 }
1349
1350 /* Only support 1:1 queue/interrupt mapping so far.
1351  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1352  * interrupt vectors (<N+1).
1353  */
1354 static int
1355 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1356 {
1357         uint32_t i;
1358         struct virtio_hw *hw = dev->data->dev_private;
1359
1360         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1361         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1362                 dev->intr_handle->intr_vec[i] = i + 1;
1363                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1364                                                  VIRTIO_MSI_NO_VECTOR) {
1365                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1366                         return -EBUSY;
1367                 }
1368         }
1369
1370         return 0;
1371 }
1372
1373 static void
1374 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1375 {
1376         uint32_t i;
1377         struct virtio_hw *hw = dev->data->dev_private;
1378
1379         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1380         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1381                 VTPCI_OPS(hw)->set_queue_irq(hw,
1382                                              hw->vqs[i * VTNET_CQ],
1383                                              VIRTIO_MSI_NO_VECTOR);
1384 }
1385
1386 static int
1387 virtio_configure_intr(struct rte_eth_dev *dev)
1388 {
1389         struct virtio_hw *hw = dev->data->dev_private;
1390
1391         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1392                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1393                 return -ENOTSUP;
1394         }
1395
1396         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1397                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1398                 return -1;
1399         }
1400
1401         if (!dev->intr_handle->intr_vec) {
1402                 dev->intr_handle->intr_vec =
1403                         rte_zmalloc("intr_vec",
1404                                     hw->max_queue_pairs * sizeof(int), 0);
1405                 if (!dev->intr_handle->intr_vec) {
1406                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1407                                      hw->max_queue_pairs);
1408                         return -ENOMEM;
1409                 }
1410         }
1411
1412         /* Re-register callback to update max_intr */
1413         rte_intr_callback_unregister(dev->intr_handle,
1414                                      virtio_interrupt_handler,
1415                                      dev);
1416         rte_intr_callback_register(dev->intr_handle,
1417                                    virtio_interrupt_handler,
1418                                    dev);
1419
1420         /* DO NOT try to remove this! This function will enable msix, or QEMU
1421          * will encounter SIGSEGV when DRIVER_OK is sent.
1422          * And for legacy devices, this should be done before queue/vec binding
1423          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1424          * (22) will be ignored.
1425          */
1426         if (virtio_intr_enable(dev) < 0) {
1427                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1428                 return -1;
1429         }
1430
1431         if (virtio_queues_bind_intr(dev) < 0) {
1432                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1433                 return -1;
1434         }
1435
1436         return 0;
1437 }
1438
1439 /* reset device and renegotiate features if needed */
1440 static int
1441 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1442 {
1443         struct virtio_hw *hw = eth_dev->data->dev_private;
1444         struct virtio_net_config *config;
1445         struct virtio_net_config local_config;
1446         struct rte_pci_device *pci_dev = NULL;
1447         int ret;
1448
1449         /* Reset the device although not necessary at startup */
1450         vtpci_reset(hw);
1451
1452         if (hw->vqs) {
1453                 virtio_dev_free_mbufs(eth_dev);
1454                 virtio_free_queues(hw);
1455         }
1456
1457         /* Tell the host we've noticed this device. */
1458         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1459
1460         /* Tell the host we've known how to drive the device. */
1461         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1462         if (virtio_negotiate_features(hw, req_features) < 0)
1463                 return -1;
1464
1465         if (!hw->virtio_user_dev) {
1466                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1467                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1468         }
1469
1470         /* If host does not support both status and MSI-X then disable LSC */
1471         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1472             hw->use_msix != VIRTIO_MSIX_NONE)
1473                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1474         else
1475                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1476
1477         /* Setting up rx_header size for the device */
1478         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1479             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1480                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1481         else
1482                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1483
1484         /* Copy the permanent MAC address to: virtio_hw */
1485         virtio_get_hwaddr(hw);
1486         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1487                         &eth_dev->data->mac_addrs[0]);
1488         PMD_INIT_LOG(DEBUG,
1489                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1490                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1491                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1492
1493         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1494                 config = &local_config;
1495
1496                 vtpci_read_dev_config(hw,
1497                         offsetof(struct virtio_net_config, mac),
1498                         &config->mac, sizeof(config->mac));
1499
1500                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1501                         vtpci_read_dev_config(hw,
1502                                 offsetof(struct virtio_net_config, status),
1503                                 &config->status, sizeof(config->status));
1504                 } else {
1505                         PMD_INIT_LOG(DEBUG,
1506                                      "VIRTIO_NET_F_STATUS is not supported");
1507                         config->status = 0;
1508                 }
1509
1510                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1511                         vtpci_read_dev_config(hw,
1512                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1513                                 &config->max_virtqueue_pairs,
1514                                 sizeof(config->max_virtqueue_pairs));
1515                 } else {
1516                         PMD_INIT_LOG(DEBUG,
1517                                      "VIRTIO_NET_F_MQ is not supported");
1518                         config->max_virtqueue_pairs = 1;
1519                 }
1520
1521                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1522
1523                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1524                         vtpci_read_dev_config(hw,
1525                                 offsetof(struct virtio_net_config, mtu),
1526                                 &config->mtu,
1527                                 sizeof(config->mtu));
1528
1529                         /*
1530                          * MTU value has already been checked at negotiation
1531                          * time, but check again in case it has changed since
1532                          * then, which should not happen.
1533                          */
1534                         if (config->mtu < ETHER_MIN_MTU) {
1535                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1536                                                 config->mtu);
1537                                 return -1;
1538                         }
1539
1540                         hw->max_mtu = config->mtu;
1541                         /* Set initial MTU to maximum one supported by vhost */
1542                         eth_dev->data->mtu = config->mtu;
1543
1544                 } else {
1545                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1546                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1547                 }
1548
1549                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1550                                 config->max_virtqueue_pairs);
1551                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1552                 PMD_INIT_LOG(DEBUG,
1553                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1554                                 config->mac[0], config->mac[1],
1555                                 config->mac[2], config->mac[3],
1556                                 config->mac[4], config->mac[5]);
1557         } else {
1558                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1559                 hw->max_queue_pairs = 1;
1560                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1561                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1562         }
1563
1564         ret = virtio_alloc_queues(eth_dev);
1565         if (ret < 0)
1566                 return ret;
1567
1568         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1569                 if (virtio_configure_intr(eth_dev) < 0) {
1570                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1571                         return -1;
1572                 }
1573         }
1574
1575         vtpci_reinit_complete(hw);
1576
1577         if (pci_dev)
1578                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1579                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1580                         pci_dev->id.device_id);
1581
1582         return 0;
1583 }
1584
1585 /*
1586  * Remap the PCI device again (IO port map for legacy device and
1587  * memory map for modern device), so that the secondary process
1588  * could have the PCI initiated correctly.
1589  */
1590 static int
1591 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1592 {
1593         if (hw->modern) {
1594                 /*
1595                  * We don't have to re-parse the PCI config space, since
1596                  * rte_pci_map_device() makes sure the mapped address
1597                  * in secondary process would equal to the one mapped in
1598                  * the primary process: error will be returned if that
1599                  * requirement is not met.
1600                  *
1601                  * That said, we could simply reuse all cap pointers
1602                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1603                  * primary process, which is stored in shared memory.
1604                  */
1605                 if (rte_pci_map_device(pci_dev)) {
1606                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1607                         return -1;
1608                 }
1609         } else {
1610                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1611                         return -1;
1612         }
1613
1614         return 0;
1615 }
1616
1617 static void
1618 virtio_set_vtpci_ops(struct virtio_hw *hw)
1619 {
1620 #ifdef RTE_VIRTIO_USER
1621         if (hw->virtio_user_dev)
1622                 VTPCI_OPS(hw) = &virtio_user_ops;
1623         else
1624 #endif
1625         if (hw->modern)
1626                 VTPCI_OPS(hw) = &modern_ops;
1627         else
1628                 VTPCI_OPS(hw) = &legacy_ops;
1629 }
1630
1631 /*
1632  * This function is based on probe() function in virtio_pci.c
1633  * It returns 0 on success.
1634  */
1635 int
1636 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1637 {
1638         struct virtio_hw *hw = eth_dev->data->dev_private;
1639         int ret;
1640
1641         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1642
1643         eth_dev->dev_ops = &virtio_eth_dev_ops;
1644
1645         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1646                 if (!hw->virtio_user_dev) {
1647                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1648                         if (ret)
1649                                 return ret;
1650                 }
1651
1652                 virtio_set_vtpci_ops(hw);
1653                 set_rxtx_funcs(eth_dev);
1654
1655                 return 0;
1656         }
1657
1658         /* Allocate memory for storing MAC addresses */
1659         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1660         if (eth_dev->data->mac_addrs == NULL) {
1661                 PMD_INIT_LOG(ERR,
1662                         "Failed to allocate %d bytes needed to store MAC addresses",
1663                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1664                 return -ENOMEM;
1665         }
1666
1667         hw->port_id = eth_dev->data->port_id;
1668         /* For virtio_user case the hw->virtio_user_dev is populated by
1669          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1670          */
1671         if (!hw->virtio_user_dev) {
1672                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1673                 if (ret)
1674                         goto out;
1675         }
1676
1677         /* reset device and negotiate default features */
1678         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1679         if (ret < 0)
1680                 goto out;
1681
1682         /* Setup interrupt callback  */
1683         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1684                 rte_intr_callback_register(eth_dev->intr_handle,
1685                         virtio_interrupt_handler, eth_dev);
1686
1687         return 0;
1688
1689 out:
1690         rte_free(eth_dev->data->mac_addrs);
1691         return ret;
1692 }
1693
1694 static int
1695 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1696 {
1697         PMD_INIT_FUNC_TRACE();
1698
1699         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1700                 return 0;
1701
1702         virtio_dev_stop(eth_dev);
1703         virtio_dev_close(eth_dev);
1704
1705         eth_dev->dev_ops = NULL;
1706         eth_dev->tx_pkt_burst = NULL;
1707         eth_dev->rx_pkt_burst = NULL;
1708
1709         /* reset interrupt callback  */
1710         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1711                 rte_intr_callback_unregister(eth_dev->intr_handle,
1712                                                 virtio_interrupt_handler,
1713                                                 eth_dev);
1714         if (eth_dev->device)
1715                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1716
1717         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1718
1719         return 0;
1720 }
1721
1722 static int vdpa_check_handler(__rte_unused const char *key,
1723                 const char *value, __rte_unused void *opaque)
1724 {
1725         if (strcmp(value, "1"))
1726                 return -1;
1727
1728         return 0;
1729 }
1730
1731 static int
1732 vdpa_mode_selected(struct rte_devargs *devargs)
1733 {
1734         struct rte_kvargs *kvlist;
1735         const char *key = "vdpa";
1736         int ret = 0;
1737
1738         if (devargs == NULL)
1739                 return 0;
1740
1741         kvlist = rte_kvargs_parse(devargs->args, NULL);
1742         if (kvlist == NULL)
1743                 return 0;
1744
1745         if (!rte_kvargs_count(kvlist, key))
1746                 goto exit;
1747
1748         /* vdpa mode selected when there's a key-value pair: vdpa=1 */
1749         if (rte_kvargs_process(kvlist, key,
1750                                 vdpa_check_handler, NULL) < 0) {
1751                 goto exit;
1752         }
1753         ret = 1;
1754
1755 exit:
1756         rte_kvargs_free(kvlist);
1757         return ret;
1758 }
1759
1760 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1761         struct rte_pci_device *pci_dev)
1762 {
1763         /* virtio pmd skips probe if device needs to work in vdpa mode */
1764         if (vdpa_mode_selected(pci_dev->device.devargs))
1765                 return 1;
1766
1767         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1768                 eth_virtio_dev_init);
1769 }
1770
1771 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1772 {
1773         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1774 }
1775
1776 static struct rte_pci_driver rte_virtio_pmd = {
1777         .driver = {
1778                 .name = "net_virtio",
1779         },
1780         .id_table = pci_id_virtio_map,
1781         .drv_flags = 0,
1782         .probe = eth_virtio_pci_probe,
1783         .remove = eth_virtio_pci_remove,
1784 };
1785
1786 RTE_INIT(rte_virtio_pmd_init)
1787 {
1788         if (rte_eal_iopl_init() != 0) {
1789                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1790                 return;
1791         }
1792
1793         rte_pci_register(&rte_virtio_pmd);
1794 }
1795
1796 static bool
1797 rx_offload_enabled(struct virtio_hw *hw)
1798 {
1799         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
1800                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1801                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
1802 }
1803
1804 static bool
1805 tx_offload_enabled(struct virtio_hw *hw)
1806 {
1807         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
1808                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
1809                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
1810 }
1811
1812 /*
1813  * Configure virtio device
1814  * It returns 0 on success.
1815  */
1816 static int
1817 virtio_dev_configure(struct rte_eth_dev *dev)
1818 {
1819         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1820         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
1821         struct virtio_hw *hw = dev->data->dev_private;
1822         uint64_t rx_offloads = rxmode->offloads;
1823         uint64_t tx_offloads = txmode->offloads;
1824         uint64_t req_features;
1825         int ret;
1826
1827         PMD_INIT_LOG(DEBUG, "configure");
1828         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1829
1830         if (dev->data->dev_conf.intr_conf.rxq) {
1831                 ret = virtio_init_device(dev, hw->req_guest_features);
1832                 if (ret < 0)
1833                         return ret;
1834         }
1835
1836         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1837                            DEV_RX_OFFLOAD_TCP_CKSUM))
1838                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1839
1840         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
1841                 req_features |=
1842                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1843                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1844
1845         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
1846                            DEV_TX_OFFLOAD_TCP_CKSUM))
1847                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
1848
1849         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
1850                 req_features |=
1851                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1852                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
1853
1854         /* if request features changed, reinit the device */
1855         if (req_features != hw->req_guest_features) {
1856                 ret = virtio_init_device(dev, req_features);
1857                 if (ret < 0)
1858                         return ret;
1859         }
1860
1861         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1862                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
1863                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1864                 PMD_DRV_LOG(ERR,
1865                         "rx checksum not available on this host");
1866                 return -ENOTSUP;
1867         }
1868
1869         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
1870                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1871                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
1872                 PMD_DRV_LOG(ERR,
1873                         "Large Receive Offload not available on this host");
1874                 return -ENOTSUP;
1875         }
1876
1877         /* start control queue */
1878         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1879                 virtio_dev_cq_start(dev);
1880
1881         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
1882                 hw->vlan_strip = 1;
1883
1884         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
1885             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1886                 PMD_DRV_LOG(ERR,
1887                             "vlan filtering not available on this host");
1888                 return -ENOTSUP;
1889         }
1890
1891         hw->has_tx_offload = tx_offload_enabled(hw);
1892         hw->has_rx_offload = rx_offload_enabled(hw);
1893
1894         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1895                 /* Enable vector (0) for Link State Intrerrupt */
1896                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1897                                 VIRTIO_MSI_NO_VECTOR) {
1898                         PMD_DRV_LOG(ERR, "failed to set config vector");
1899                         return -EBUSY;
1900                 }
1901
1902         rte_spinlock_init(&hw->state_lock);
1903
1904         hw->use_simple_rx = 1;
1905
1906         if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
1907                 hw->use_inorder_tx = 1;
1908                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1909                         hw->use_inorder_rx = 1;
1910                         hw->use_simple_rx = 0;
1911                 } else {
1912                         hw->use_inorder_rx = 0;
1913                 }
1914         }
1915
1916 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
1917         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1918                 hw->use_simple_rx = 0;
1919         }
1920 #endif
1921         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1922                  hw->use_simple_rx = 0;
1923         }
1924
1925         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1926                            DEV_RX_OFFLOAD_TCP_CKSUM |
1927                            DEV_RX_OFFLOAD_TCP_LRO |
1928                            DEV_RX_OFFLOAD_VLAN_STRIP))
1929                 hw->use_simple_rx = 0;
1930
1931         return 0;
1932 }
1933
1934
1935 static int
1936 virtio_dev_start(struct rte_eth_dev *dev)
1937 {
1938         uint16_t nb_queues, i;
1939         struct virtnet_rx *rxvq;
1940         struct virtnet_tx *txvq __rte_unused;
1941         struct virtio_hw *hw = dev->data->dev_private;
1942         int ret;
1943
1944         /* Finish the initialization of the queues */
1945         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1946                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1947                 if (ret < 0)
1948                         return ret;
1949         }
1950         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1951                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1952                 if (ret < 0)
1953                         return ret;
1954         }
1955
1956         /* check if lsc interrupt feature is enabled */
1957         if (dev->data->dev_conf.intr_conf.lsc) {
1958                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1959                         PMD_DRV_LOG(ERR, "link status not supported by host");
1960                         return -ENOTSUP;
1961                 }
1962         }
1963
1964         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1965          * in device configure, but it could be unmapped  when device is
1966          * stopped.
1967          */
1968         if (dev->data->dev_conf.intr_conf.lsc ||
1969             dev->data->dev_conf.intr_conf.rxq) {
1970                 virtio_intr_disable(dev);
1971
1972                 if (virtio_intr_enable(dev) < 0) {
1973                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1974                         return -EIO;
1975                 }
1976         }
1977
1978         /*Notify the backend
1979          *Otherwise the tap backend might already stop its queue due to fullness.
1980          *vhost backend will have no chance to be waked up
1981          */
1982         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1983         if (hw->max_queue_pairs > 1) {
1984                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1985                         return -EINVAL;
1986         }
1987
1988         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1989
1990         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1991                 rxvq = dev->data->rx_queues[i];
1992                 /* Flush the old packets */
1993                 virtqueue_rxvq_flush(rxvq->vq);
1994                 virtqueue_notify(rxvq->vq);
1995         }
1996
1997         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1998                 txvq = dev->data->tx_queues[i];
1999                 virtqueue_notify(txvq->vq);
2000         }
2001
2002         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2003
2004         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2005                 rxvq = dev->data->rx_queues[i];
2006                 VIRTQUEUE_DUMP(rxvq->vq);
2007         }
2008
2009         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2010                 txvq = dev->data->tx_queues[i];
2011                 VIRTQUEUE_DUMP(txvq->vq);
2012         }
2013
2014         set_rxtx_funcs(dev);
2015         hw->started = 1;
2016
2017         /* Initialize Link state */
2018         virtio_dev_link_update(dev, 0);
2019
2020         return 0;
2021 }
2022
2023 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2024 {
2025         struct virtio_hw *hw = dev->data->dev_private;
2026         uint16_t nr_vq = virtio_get_nr_vq(hw);
2027         const char *type __rte_unused;
2028         unsigned int i, mbuf_num = 0;
2029         struct virtqueue *vq;
2030         struct rte_mbuf *buf;
2031         int queue_type;
2032
2033         if (hw->vqs == NULL)
2034                 return;
2035
2036         for (i = 0; i < nr_vq; i++) {
2037                 vq = hw->vqs[i];
2038                 if (!vq)
2039                         continue;
2040
2041                 queue_type = virtio_get_queue_type(hw, i);
2042                 if (queue_type == VTNET_RQ)
2043                         type = "rxq";
2044                 else if (queue_type == VTNET_TQ)
2045                         type = "txq";
2046                 else
2047                         continue;
2048
2049                 PMD_INIT_LOG(DEBUG,
2050                         "Before freeing %s[%d] used and unused buf",
2051                         type, i);
2052                 VIRTQUEUE_DUMP(vq);
2053
2054                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2055                         rte_pktmbuf_free(buf);
2056                         mbuf_num++;
2057                 }
2058
2059                 PMD_INIT_LOG(DEBUG,
2060                         "After freeing %s[%d] used and unused buf",
2061                         type, i);
2062                 VIRTQUEUE_DUMP(vq);
2063         }
2064
2065         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2066 }
2067
2068 /*
2069  * Stop device: disable interrupt and mark link down
2070  */
2071 static void
2072 virtio_dev_stop(struct rte_eth_dev *dev)
2073 {
2074         struct virtio_hw *hw = dev->data->dev_private;
2075         struct rte_eth_link link;
2076         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2077
2078         PMD_INIT_LOG(DEBUG, "stop");
2079
2080         rte_spinlock_lock(&hw->state_lock);
2081         if (intr_conf->lsc || intr_conf->rxq)
2082                 virtio_intr_disable(dev);
2083
2084         hw->started = 0;
2085         memset(&link, 0, sizeof(link));
2086         rte_eth_linkstatus_set(dev, &link);
2087         rte_spinlock_unlock(&hw->state_lock);
2088 }
2089
2090 static int
2091 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2092 {
2093         struct rte_eth_link link;
2094         uint16_t status;
2095         struct virtio_hw *hw = dev->data->dev_private;
2096
2097         memset(&link, 0, sizeof(link));
2098         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2099         link.link_speed  = ETH_SPEED_NUM_10G;
2100         link.link_autoneg = ETH_LINK_FIXED;
2101
2102         if (hw->started == 0) {
2103                 link.link_status = ETH_LINK_DOWN;
2104         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2105                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2106                 vtpci_read_dev_config(hw,
2107                                 offsetof(struct virtio_net_config, status),
2108                                 &status, sizeof(status));
2109                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2110                         link.link_status = ETH_LINK_DOWN;
2111                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2112                                      dev->data->port_id);
2113                 } else {
2114                         link.link_status = ETH_LINK_UP;
2115                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2116                                      dev->data->port_id);
2117                 }
2118         } else {
2119                 link.link_status = ETH_LINK_UP;
2120         }
2121
2122         return rte_eth_linkstatus_set(dev, &link);
2123 }
2124
2125 static int
2126 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2127 {
2128         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2129         struct virtio_hw *hw = dev->data->dev_private;
2130         uint64_t offloads = rxmode->offloads;
2131
2132         if (mask & ETH_VLAN_FILTER_MASK) {
2133                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2134                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2135
2136                         PMD_DRV_LOG(NOTICE,
2137                                 "vlan filtering not available on this host");
2138
2139                         return -ENOTSUP;
2140                 }
2141         }
2142
2143         if (mask & ETH_VLAN_STRIP_MASK)
2144                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2145
2146         return 0;
2147 }
2148
2149 static void
2150 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2151 {
2152         uint64_t tso_mask, host_features;
2153         struct virtio_hw *hw = dev->data->dev_private;
2154
2155         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2156
2157         dev_info->max_rx_queues =
2158                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2159         dev_info->max_tx_queues =
2160                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2161         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2162         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2163         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2164
2165         host_features = VTPCI_OPS(hw)->get_features(hw);
2166         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2167         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2168                 dev_info->rx_offload_capa |=
2169                         DEV_RX_OFFLOAD_TCP_CKSUM |
2170                         DEV_RX_OFFLOAD_UDP_CKSUM;
2171         }
2172         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2173                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2174         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2175                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2176         if ((host_features & tso_mask) == tso_mask)
2177                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2178
2179         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2180                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2181         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2182                 dev_info->tx_offload_capa |=
2183                         DEV_TX_OFFLOAD_UDP_CKSUM |
2184                         DEV_TX_OFFLOAD_TCP_CKSUM;
2185         }
2186         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2187                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2188         if ((host_features & tso_mask) == tso_mask)
2189                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2190 }
2191
2192 /*
2193  * It enables testpmd to collect per queue stats.
2194  */
2195 static int
2196 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2197 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2198 __rte_unused uint8_t is_rx)
2199 {
2200         return 0;
2201 }
2202
2203 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2204 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2205 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2206
2207 RTE_INIT(virtio_init_log)
2208 {
2209         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2210         if (virtio_logtype_init >= 0)
2211                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2212         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2213         if (virtio_logtype_driver >= 0)
2214                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2215 }