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.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_common.h>
  23 #include <rte_errno.h>
  24 #include <rte_cpuflags.h>
  25
  26 #include <rte_memory.h>
  27 #include <rte_eal.h>
  28 #include <rte_dev.h>
  29
  30 #include "virtio_ethdev.h"
  31 #include "virtio_pci.h"
  32 #include "virtio_logs.h"
  33 #include "virtqueue.h"
  34 #include "virtio_rxtx.h"
  35
  36 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  37 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  38 static int  virtio_dev_start(struct rte_eth_dev *dev);
  39 static void virtio_dev_stop(struct rte_eth_dev *dev);
  40 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  41 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  42 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  43 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  44 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  45                                 struct rte_eth_dev_info *dev_info);
  46 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  47         int wait_to_complete);
  48 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  49
  50 static void virtio_set_hwaddr(struct virtio_hw *hw);
  51 static void virtio_get_hwaddr(struct virtio_hw *hw);
  52
  53 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  54                                  struct rte_eth_stats *stats);
  55 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  56                                  struct rte_eth_xstat *xstats, unsigned n);
  57 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  58                                        struct rte_eth_xstat_name *xstats_names,
  59                                        unsigned limit);
  60 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  61 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  62 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  63                                 uint16_t vlan_id, int on);
  64 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  65                                 struct ether_addr *mac_addr,
  66                                 uint32_t index, uint32_t vmdq);
  67 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  68 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  69                                 struct ether_addr *mac_addr);
  70
  71 static int virtio_intr_enable(struct rte_eth_dev *dev);
  72 static int virtio_intr_disable(struct rte_eth_dev *dev);
  73
  74 static int virtio_dev_queue_stats_mapping_set(
  75         struct rte_eth_dev *eth_dev,
  76         uint16_t queue_id,
  77         uint8_t stat_idx,
  78         uint8_t is_rx);
  79
  80 int virtio_logtype_init;
  81 int virtio_logtype_driver;
  82
  83 /*
  84  * The set of PCI devices this driver supports
  85  */
  86 static const struct rte_pci_id pci_id_virtio_map[] = {
  87         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  88         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  89         { .vendor_id = 0, /* sentinel */ },
  90 };
  91
  92 struct rte_virtio_xstats_name_off {
  93         char name[RTE_ETH_XSTATS_NAME_SIZE];
  94         unsigned offset;
  95 };
  96
  97 /* [rt]x_qX_ is prepended to the name string here */
  98 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
  99         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 100         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 101         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 102         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 103         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 104         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 105         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 106         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 107         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 108         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 109         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 110         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 111         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 112 };
 113
 114 /* [rt]x_qX_ is prepended to the name string here */
 115 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 116         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 117         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 118         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 119         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 120         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 121         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 122         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 123         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 124         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 125         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 126         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 127         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 128         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 129 };
 130
 131 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 132                             sizeof(rte_virtio_rxq_stat_strings[0]))
 133 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 134                             sizeof(rte_virtio_txq_stat_strings[0]))
 135
 136 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 137
 138 static int
 139 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 140                 int *dlen, int pkt_num)
 141 {
 142         uint32_t head, i;
 143         int k, sum = 0;
 144         virtio_net_ctrl_ack status = ~0;
 145         struct virtio_pmd_ctrl *result;
 146         struct virtqueue *vq;
 147
 148         ctrl->status = status;
 149
 150         if (!cvq || !cvq->vq) {
 151                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 152                 return -1;
 153         }
 154         vq = cvq->vq;
 155         head = vq->vq_desc_head_idx;
 156
 157         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 158                 "vq->hw->cvq = %p vq = %p",
 159                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 160
 161         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 162                 return -1;
 163
 164         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 165                 sizeof(struct virtio_pmd_ctrl));
 166
 167         /*
 168          * Format is enforced in qemu code:
 169          * One TX packet for header;
 170          * At least one TX packet per argument;
 171          * One RX packet for ACK.
 172          */
 173         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 174         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 175         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 176         vq->vq_free_cnt--;
 177         i = vq->vq_ring.desc[head].next;
 178
 179         for (k = 0; k < pkt_num; k++) {
 180                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 181                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 182                         + sizeof(struct virtio_net_ctrl_hdr)
 183                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 184                 vq->vq_ring.desc[i].len = dlen[k];
 185                 sum += dlen[k];
 186                 vq->vq_free_cnt--;
 187                 i = vq->vq_ring.desc[i].next;
 188         }
 189
 190         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 191         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 192                         + sizeof(struct virtio_net_ctrl_hdr);
 193         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 194         vq->vq_free_cnt--;
 195
 196         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 197
 198         vq_update_avail_ring(vq, head);
 199         vq_update_avail_idx(vq);
 200
 201         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 202
 203         virtqueue_notify(vq);
 204
 205         rte_rmb();
 206         while (VIRTQUEUE_NUSED(vq) == 0) {
 207                 rte_rmb();
 208                 usleep(100);
 209         }
 210
 211         while (VIRTQUEUE_NUSED(vq)) {
 212                 uint32_t idx, desc_idx, used_idx;
 213                 struct vring_used_elem *uep;
 214
 215                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 216                                 & (vq->vq_nentries - 1));
 217                 uep = &vq->vq_ring.used->ring[used_idx];
 218                 idx = (uint32_t) uep->id;
 219                 desc_idx = idx;
 220
 221                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 222                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 223                         vq->vq_free_cnt++;
 224                 }
 225
 226                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 227                 vq->vq_desc_head_idx = idx;
 228
 229                 vq->vq_used_cons_idx++;
 230                 vq->vq_free_cnt++;
 231         }
 232
 233         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 234                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 235
 236         result = cvq->virtio_net_hdr_mz->addr;
 237
 238         return result->status;
 239 }
 240
 241 static int
 242 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 243 {
 244         struct virtio_hw *hw = dev->data->dev_private;
 245         struct virtio_pmd_ctrl ctrl;
 246         int dlen[1];
 247         int ret;
 248
 249         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 250         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 251         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 252
 253         dlen[0] = sizeof(uint16_t);
 254
 255         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 256         if (ret) {
 257                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 258                           "failed, this is too late now...");
 259                 return -EINVAL;
 260         }
 261
 262         return 0;
 263 }
 264
 265 static void
 266 virtio_dev_queue_release(void *queue __rte_unused)
 267 {
 268         /* do nothing */
 269 }
 270
 271 static int
 272 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
 273 {
 274         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
 275                 return VTNET_CQ;
 276         else if (vtpci_queue_idx % 2 == 0)
 277                 return VTNET_RQ;
 278         else
 279                 return VTNET_TQ;
 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 /*
1222  * Process Virtio Config changed interrupt and call the callback
1223  * if link state changed.
1224  */
1225 void
1226 virtio_interrupt_handler(void *param)
1227 {
1228         struct rte_eth_dev *dev = param;
1229         struct virtio_hw *hw = dev->data->dev_private;
1230         uint8_t isr;
1231
1232         /* Read interrupt status which clears interrupt */
1233         isr = vtpci_isr(hw);
1234         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1235
1236         if (virtio_intr_enable(dev) < 0)
1237                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1238
1239         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1240                 if (virtio_dev_link_update(dev, 0) == 0)
1241                         _rte_eth_dev_callback_process(dev,
1242                                                       RTE_ETH_EVENT_INTR_LSC,
1243                                                       NULL);
1244         }
1245
1246 }
1247
1248 /* set rx and tx handlers according to what is supported */
1249 static void
1250 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1251 {
1252         struct virtio_hw *hw = eth_dev->data->dev_private;
1253
1254         if (hw->use_simple_rx) {
1255                 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1256                         eth_dev->data->port_id);
1257                 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1258         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1259                 PMD_INIT_LOG(INFO,
1260                         "virtio: using mergeable buffer Rx path on port %u",
1261                         eth_dev->data->port_id);
1262                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1263         } else {
1264                 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1265                         eth_dev->data->port_id);
1266                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1267         }
1268
1269         if (hw->use_simple_tx) {
1270                 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1271                         eth_dev->data->port_id);
1272                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1273         } else {
1274                 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1275                         eth_dev->data->port_id);
1276                 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1277         }
1278 }
1279
1280 /* Only support 1:1 queue/interrupt mapping so far.
1281  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1282  * interrupt vectors (<N+1).
1283  */
1284 static int
1285 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1286 {
1287         uint32_t i;
1288         struct virtio_hw *hw = dev->data->dev_private;
1289
1290         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1291         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1292                 dev->intr_handle->intr_vec[i] = i + 1;
1293                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1294                                                  VIRTIO_MSI_NO_VECTOR) {
1295                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1296                         return -EBUSY;
1297                 }
1298         }
1299
1300         return 0;
1301 }
1302
1303 static void
1304 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1305 {
1306         uint32_t i;
1307         struct virtio_hw *hw = dev->data->dev_private;
1308
1309         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1310         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1311                 VTPCI_OPS(hw)->set_queue_irq(hw,
1312                                              hw->vqs[i * VTNET_CQ],
1313                                              VIRTIO_MSI_NO_VECTOR);
1314 }
1315
1316 static int
1317 virtio_configure_intr(struct rte_eth_dev *dev)
1318 {
1319         struct virtio_hw *hw = dev->data->dev_private;
1320
1321         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1322                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1323                 return -ENOTSUP;
1324         }
1325
1326         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1327                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1328                 return -1;
1329         }
1330
1331         if (!dev->intr_handle->intr_vec) {
1332                 dev->intr_handle->intr_vec =
1333                         rte_zmalloc("intr_vec",
1334                                     hw->max_queue_pairs * sizeof(int), 0);
1335                 if (!dev->intr_handle->intr_vec) {
1336                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1337                                      hw->max_queue_pairs);
1338                         return -ENOMEM;
1339                 }
1340         }
1341
1342         /* Re-register callback to update max_intr */
1343         rte_intr_callback_unregister(dev->intr_handle,
1344                                      virtio_interrupt_handler,
1345                                      dev);
1346         rte_intr_callback_register(dev->intr_handle,
1347                                    virtio_interrupt_handler,
1348                                    dev);
1349
1350         /* DO NOT try to remove this! This function will enable msix, or QEMU
1351          * will encounter SIGSEGV when DRIVER_OK is sent.
1352          * And for legacy devices, this should be done before queue/vec binding
1353          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1354          * (22) will be ignored.
1355          */
1356         if (virtio_intr_enable(dev) < 0) {
1357                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1358                 return -1;
1359         }
1360
1361         if (virtio_queues_bind_intr(dev) < 0) {
1362                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1363                 return -1;
1364         }
1365
1366         return 0;
1367 }
1368
1369 /* reset device and renegotiate features if needed */
1370 static int
1371 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1372 {
1373         struct virtio_hw *hw = eth_dev->data->dev_private;
1374         struct virtio_net_config *config;
1375         struct virtio_net_config local_config;
1376         struct rte_pci_device *pci_dev = NULL;
1377         int ret;
1378
1379         /* Reset the device although not necessary at startup */
1380         vtpci_reset(hw);
1381
1382         /* Tell the host we've noticed this device. */
1383         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1384
1385         /* Tell the host we've known how to drive the device. */
1386         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1387         if (virtio_negotiate_features(hw, req_features) < 0)
1388                 return -1;
1389
1390         if (!hw->virtio_user_dev) {
1391                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1392                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1393         }
1394
1395         /* If host does not support both status and MSI-X then disable LSC */
1396         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1397             hw->use_msix != VIRTIO_MSIX_NONE)
1398                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1399         else
1400                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1401
1402         /* Setting up rx_header size for the device */
1403         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1404             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1405                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1406         else
1407                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1408
1409         /* Copy the permanent MAC address to: virtio_hw */
1410         virtio_get_hwaddr(hw);
1411         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1412                         &eth_dev->data->mac_addrs[0]);
1413         PMD_INIT_LOG(DEBUG,
1414                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1415                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1416                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1417
1418         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1419                 config = &local_config;
1420
1421                 vtpci_read_dev_config(hw,
1422                         offsetof(struct virtio_net_config, mac),
1423                         &config->mac, sizeof(config->mac));
1424
1425                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1426                         vtpci_read_dev_config(hw,
1427                                 offsetof(struct virtio_net_config, status),
1428                                 &config->status, sizeof(config->status));
1429                 } else {
1430                         PMD_INIT_LOG(DEBUG,
1431                                      "VIRTIO_NET_F_STATUS is not supported");
1432                         config->status = 0;
1433                 }
1434
1435                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1436                         vtpci_read_dev_config(hw,
1437                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1438                                 &config->max_virtqueue_pairs,
1439                                 sizeof(config->max_virtqueue_pairs));
1440                 } else {
1441                         PMD_INIT_LOG(DEBUG,
1442                                      "VIRTIO_NET_F_MQ is not supported");
1443                         config->max_virtqueue_pairs = 1;
1444                 }
1445
1446                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1447
1448                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1449                         vtpci_read_dev_config(hw,
1450                                 offsetof(struct virtio_net_config, mtu),
1451                                 &config->mtu,
1452                                 sizeof(config->mtu));
1453
1454                         /*
1455                          * MTU value has already been checked at negotiation
1456                          * time, but check again in case it has changed since
1457                          * then, which should not happen.
1458                          */
1459                         if (config->mtu < ETHER_MIN_MTU) {
1460                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1461                                                 config->mtu);
1462                                 return -1;
1463                         }
1464
1465                         hw->max_mtu = config->mtu;
1466                         /* Set initial MTU to maximum one supported by vhost */
1467                         eth_dev->data->mtu = config->mtu;
1468
1469                 } else {
1470                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1471                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1472                 }
1473
1474                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1475                                 config->max_virtqueue_pairs);
1476                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1477                 PMD_INIT_LOG(DEBUG,
1478                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1479                                 config->mac[0], config->mac[1],
1480                                 config->mac[2], config->mac[3],
1481                                 config->mac[4], config->mac[5]);
1482         } else {
1483                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1484                 hw->max_queue_pairs = 1;
1485                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1486                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1487         }
1488
1489         ret = virtio_alloc_queues(eth_dev);
1490         if (ret < 0)
1491                 return ret;
1492
1493         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1494                 if (virtio_configure_intr(eth_dev) < 0) {
1495                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1496                         return -1;
1497                 }
1498         }
1499
1500         vtpci_reinit_complete(hw);
1501
1502         if (pci_dev)
1503                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1504                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1505                         pci_dev->id.device_id);
1506
1507         return 0;
1508 }
1509
1510 /*
1511  * Remap the PCI device again (IO port map for legacy device and
1512  * memory map for modern device), so that the secondary process
1513  * could have the PCI initiated correctly.
1514  */
1515 static int
1516 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1517 {
1518         if (hw->modern) {
1519                 /*
1520                  * We don't have to re-parse the PCI config space, since
1521                  * rte_pci_map_device() makes sure the mapped address
1522                  * in secondary process would equal to the one mapped in
1523                  * the primary process: error will be returned if that
1524                  * requirement is not met.
1525                  *
1526                  * That said, we could simply reuse all cap pointers
1527                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1528                  * primary process, which is stored in shared memory.
1529                  */
1530                 if (rte_pci_map_device(pci_dev)) {
1531                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1532                         return -1;
1533                 }
1534         } else {
1535                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1536                         return -1;
1537         }
1538
1539         return 0;
1540 }
1541
1542 static void
1543 virtio_set_vtpci_ops(struct virtio_hw *hw)
1544 {
1545 #ifdef RTE_VIRTIO_USER
1546         if (hw->virtio_user_dev)
1547                 VTPCI_OPS(hw) = &virtio_user_ops;
1548         else
1549 #endif
1550         if (hw->modern)
1551                 VTPCI_OPS(hw) = &modern_ops;
1552         else
1553                 VTPCI_OPS(hw) = &legacy_ops;
1554 }
1555
1556 /*
1557  * This function is based on probe() function in virtio_pci.c
1558  * It returns 0 on success.
1559  */
1560 int
1561 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1562 {
1563         struct virtio_hw *hw = eth_dev->data->dev_private;
1564         int ret;
1565
1566         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1567
1568         eth_dev->dev_ops = &virtio_eth_dev_ops;
1569
1570         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1571                 if (!hw->virtio_user_dev) {
1572                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1573                         if (ret)
1574                                 return ret;
1575                 }
1576
1577                 virtio_set_vtpci_ops(hw);
1578                 set_rxtx_funcs(eth_dev);
1579
1580                 return 0;
1581         }
1582
1583         /* Allocate memory for storing MAC addresses */
1584         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1585         if (eth_dev->data->mac_addrs == NULL) {
1586                 PMD_INIT_LOG(ERR,
1587                         "Failed to allocate %d bytes needed to store MAC addresses",
1588                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1589                 return -ENOMEM;
1590         }
1591
1592         hw->port_id = eth_dev->data->port_id;
1593         /* For virtio_user case the hw->virtio_user_dev is populated by
1594          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1595          */
1596         if (!hw->virtio_user_dev) {
1597                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1598                 if (ret)
1599                         goto out;
1600         }
1601
1602         /* reset device and negotiate default features */
1603         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1604         if (ret < 0)
1605                 goto out;
1606
1607         /* Setup interrupt callback  */
1608         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1609                 rte_intr_callback_register(eth_dev->intr_handle,
1610                         virtio_interrupt_handler, eth_dev);
1611
1612         return 0;
1613
1614 out:
1615         rte_free(eth_dev->data->mac_addrs);
1616         return ret;
1617 }
1618
1619 static int
1620 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1621 {
1622         PMD_INIT_FUNC_TRACE();
1623
1624         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1625                 return -EPERM;
1626
1627         virtio_dev_stop(eth_dev);
1628         virtio_dev_close(eth_dev);
1629
1630         eth_dev->dev_ops = NULL;
1631         eth_dev->tx_pkt_burst = NULL;
1632         eth_dev->rx_pkt_burst = NULL;
1633
1634         rte_free(eth_dev->data->mac_addrs);
1635         eth_dev->data->mac_addrs = NULL;
1636
1637         /* reset interrupt callback  */
1638         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1639                 rte_intr_callback_unregister(eth_dev->intr_handle,
1640                                                 virtio_interrupt_handler,
1641                                                 eth_dev);
1642         if (eth_dev->device)
1643                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1644
1645         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1646
1647         return 0;
1648 }
1649
1650 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1651         struct rte_pci_device *pci_dev)
1652 {
1653         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1654                 eth_virtio_dev_init);
1655 }
1656
1657 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1658 {
1659         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1660 }
1661
1662 static struct rte_pci_driver rte_virtio_pmd = {
1663         .driver = {
1664                 .name = "net_virtio",
1665         },
1666         .id_table = pci_id_virtio_map,
1667         .drv_flags = 0,
1668         .probe = eth_virtio_pci_probe,
1669         .remove = eth_virtio_pci_remove,
1670 };
1671
1672 RTE_INIT(rte_virtio_pmd_init);
1673 static void
1674 rte_virtio_pmd_init(void)
1675 {
1676         if (rte_eal_iopl_init() != 0) {
1677                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1678                 return;
1679         }
1680
1681         rte_pci_register(&rte_virtio_pmd);
1682 }
1683
1684 /*
1685  * Configure virtio device
1686  * It returns 0 on success.
1687  */
1688 static int
1689 virtio_dev_configure(struct rte_eth_dev *dev)
1690 {
1691         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1692         struct virtio_hw *hw = dev->data->dev_private;
1693         uint64_t req_features;
1694         int ret;
1695
1696         PMD_INIT_LOG(DEBUG, "configure");
1697         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1698
1699         if (dev->data->dev_conf.intr_conf.rxq) {
1700                 ret = virtio_init_device(dev, hw->req_guest_features);
1701                 if (ret < 0)
1702                         return ret;
1703         }
1704
1705         /* The name hw_ip_checksum is a bit confusing since it can be
1706          * set by the application to request L3 and/or L4 checksums. In
1707          * case of virtio, only L4 checksum is supported.
1708          */
1709         if (rxmode->hw_ip_checksum)
1710                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1711
1712         if (rxmode->enable_lro)
1713                 req_features |=
1714                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1715                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1716
1717         /* if request features changed, reinit the device */
1718         if (req_features != hw->req_guest_features) {
1719                 ret = virtio_init_device(dev, req_features);
1720                 if (ret < 0)
1721                         return ret;
1722         }
1723
1724         if (rxmode->hw_ip_checksum &&
1725                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1726                 PMD_DRV_LOG(ERR,
1727                         "rx checksum not available on this host");
1728                 return -ENOTSUP;
1729         }
1730
1731         if (rxmode->enable_lro &&
1732                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1733                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
1734                 PMD_DRV_LOG(ERR,
1735                         "Large Receive Offload not available on this host");
1736                 return -ENOTSUP;
1737         }
1738
1739         /* start control queue */
1740         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1741                 virtio_dev_cq_start(dev);
1742
1743         hw->vlan_strip = rxmode->hw_vlan_strip;
1744
1745         if (rxmode->hw_vlan_filter
1746             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1747                 PMD_DRV_LOG(ERR,
1748                             "vlan filtering not available on this host");
1749                 return -ENOTSUP;
1750         }
1751
1752         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1753                 /* Enable vector (0) for Link State Intrerrupt */
1754                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1755                                 VIRTIO_MSI_NO_VECTOR) {
1756                         PMD_DRV_LOG(ERR, "failed to set config vector");
1757                         return -EBUSY;
1758                 }
1759
1760         hw->use_simple_rx = 1;
1761         hw->use_simple_tx = 1;
1762
1763 #if defined RTE_ARCH_ARM64 || defined CONFIG_RTE_ARCH_ARM
1764         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1765                 hw->use_simple_rx = 0;
1766                 hw->use_simple_tx = 0;
1767         }
1768 #endif
1769         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1770                 hw->use_simple_rx = 0;
1771                 hw->use_simple_tx = 0;
1772         }
1773
1774         if (rxmode->hw_ip_checksum)
1775                 hw->use_simple_rx = 0;
1776
1777         return 0;
1778 }
1779
1780
1781 static int
1782 virtio_dev_start(struct rte_eth_dev *dev)
1783 {
1784         uint16_t nb_queues, i;
1785         struct virtnet_rx *rxvq;
1786         struct virtnet_tx *txvq __rte_unused;
1787         struct virtio_hw *hw = dev->data->dev_private;
1788         int ret;
1789
1790         /* Finish the initialization of the queues */
1791         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1792                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1793                 if (ret < 0)
1794                         return ret;
1795         }
1796         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1797                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1798                 if (ret < 0)
1799                         return ret;
1800         }
1801
1802         /* check if lsc interrupt feature is enabled */
1803         if (dev->data->dev_conf.intr_conf.lsc) {
1804                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1805                         PMD_DRV_LOG(ERR, "link status not supported by host");
1806                         return -ENOTSUP;
1807                 }
1808         }
1809
1810         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1811          * in device configure, but it could be unmapped  when device is
1812          * stopped.
1813          */
1814         if (dev->data->dev_conf.intr_conf.lsc ||
1815             dev->data->dev_conf.intr_conf.rxq) {
1816                 virtio_intr_disable(dev);
1817
1818                 if (virtio_intr_enable(dev) < 0) {
1819                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1820                         return -EIO;
1821                 }
1822         }
1823
1824         /*Notify the backend
1825          *Otherwise the tap backend might already stop its queue due to fullness.
1826          *vhost backend will have no chance to be waked up
1827          */
1828         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1829         if (hw->max_queue_pairs > 1) {
1830                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1831                         return -EINVAL;
1832         }
1833
1834         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1835
1836         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1837                 rxvq = dev->data->rx_queues[i];
1838                 /* Flush the old packets */
1839                 virtqueue_rxvq_flush(rxvq->vq);
1840                 virtqueue_notify(rxvq->vq);
1841         }
1842
1843         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1844                 txvq = dev->data->tx_queues[i];
1845                 virtqueue_notify(txvq->vq);
1846         }
1847
1848         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1849
1850         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1851                 rxvq = dev->data->rx_queues[i];
1852                 VIRTQUEUE_DUMP(rxvq->vq);
1853         }
1854
1855         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1856                 txvq = dev->data->tx_queues[i];
1857                 VIRTQUEUE_DUMP(txvq->vq);
1858         }
1859
1860         set_rxtx_funcs(dev);
1861         hw->started = 1;
1862
1863         /* Initialize Link state */
1864         virtio_dev_link_update(dev, 0);
1865
1866         return 0;
1867 }
1868
1869 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1870 {
1871         struct rte_mbuf *buf;
1872         int i, mbuf_num = 0;
1873
1874         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1875                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1876
1877                 PMD_INIT_LOG(DEBUG,
1878                              "Before freeing rxq[%d] used and unused buf", i);
1879                 VIRTQUEUE_DUMP(rxvq->vq);
1880
1881                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1882                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1883                         rte_pktmbuf_free(buf);
1884                         mbuf_num++;
1885                 }
1886
1887                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1888                 PMD_INIT_LOG(DEBUG,
1889                              "After freeing rxq[%d] used and unused buf", i);
1890                 VIRTQUEUE_DUMP(rxvq->vq);
1891         }
1892
1893         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1894                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1895
1896                 PMD_INIT_LOG(DEBUG,
1897                              "Before freeing txq[%d] used and unused bufs",
1898                              i);
1899                 VIRTQUEUE_DUMP(txvq->vq);
1900
1901                 mbuf_num = 0;
1902                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1903                         rte_pktmbuf_free(buf);
1904                         mbuf_num++;
1905                 }
1906
1907                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1908                 PMD_INIT_LOG(DEBUG,
1909                              "After freeing txq[%d] used and unused buf", i);
1910                 VIRTQUEUE_DUMP(txvq->vq);
1911         }
1912 }
1913
1914 /*
1915  * Stop device: disable interrupt and mark link down
1916  */
1917 static void
1918 virtio_dev_stop(struct rte_eth_dev *dev)
1919 {
1920         struct virtio_hw *hw = dev->data->dev_private;
1921         struct rte_eth_link link;
1922         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1923
1924         PMD_INIT_LOG(DEBUG, "stop");
1925
1926         if (intr_conf->lsc || intr_conf->rxq)
1927                 virtio_intr_disable(dev);
1928
1929         hw->started = 0;
1930         memset(&link, 0, sizeof(link));
1931         virtio_dev_atomic_write_link_status(dev, &link);
1932 }
1933
1934 static int
1935 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1936 {
1937         struct rte_eth_link link, old;
1938         uint16_t status;
1939         struct virtio_hw *hw = dev->data->dev_private;
1940         memset(&link, 0, sizeof(link));
1941         virtio_dev_atomic_read_link_status(dev, &link);
1942         old = link;
1943         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1944         link.link_speed  = ETH_SPEED_NUM_10G;
1945
1946         if (hw->started == 0) {
1947                 link.link_status = ETH_LINK_DOWN;
1948         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1949                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1950                 vtpci_read_dev_config(hw,
1951                                 offsetof(struct virtio_net_config, status),
1952                                 &status, sizeof(status));
1953                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1954                         link.link_status = ETH_LINK_DOWN;
1955                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1956                                      dev->data->port_id);
1957                 } else {
1958                         link.link_status = ETH_LINK_UP;
1959                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1960                                      dev->data->port_id);
1961                 }
1962         } else {
1963                 link.link_status = ETH_LINK_UP;
1964         }
1965         virtio_dev_atomic_write_link_status(dev, &link);
1966
1967         return (old.link_status == link.link_status) ? -1 : 0;
1968 }
1969
1970 static int
1971 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
1972 {
1973         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1974         struct virtio_hw *hw = dev->data->dev_private;
1975
1976         if (mask & ETH_VLAN_FILTER_MASK) {
1977                 if (rxmode->hw_vlan_filter &&
1978                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1979
1980                         PMD_DRV_LOG(NOTICE,
1981                                 "vlan filtering not available on this host");
1982
1983                         return -ENOTSUP;
1984                 }
1985         }
1986
1987         if (mask & ETH_VLAN_STRIP_MASK)
1988                 hw->vlan_strip = rxmode->hw_vlan_strip;
1989
1990         return 0;
1991 }
1992
1993 static void
1994 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1995 {
1996         uint64_t tso_mask, host_features;
1997         struct virtio_hw *hw = dev->data->dev_private;
1998
1999         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2000
2001         dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL;
2002         dev_info->max_rx_queues =
2003                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2004         dev_info->max_tx_queues =
2005                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2006         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2007         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2008         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2009         dev_info->default_txconf = (struct rte_eth_txconf) {
2010                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
2011         };
2012
2013         host_features = VTPCI_OPS(hw)->get_features(hw);
2014         dev_info->rx_offload_capa = 0;
2015         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2016                 dev_info->rx_offload_capa |=
2017                         DEV_RX_OFFLOAD_TCP_CKSUM |
2018                         DEV_RX_OFFLOAD_UDP_CKSUM;
2019         }
2020         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2021                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2022         if ((host_features & tso_mask) == tso_mask)
2023                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2024
2025         dev_info->tx_offload_capa = 0;
2026         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2027                 dev_info->tx_offload_capa |=
2028                         DEV_TX_OFFLOAD_UDP_CKSUM |
2029                         DEV_TX_OFFLOAD_TCP_CKSUM;
2030         }
2031         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2032                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2033         if ((hw->guest_features & tso_mask) == tso_mask)
2034                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2035 }
2036
2037 /*
2038  * It enables testpmd to collect per queue stats.
2039  */
2040 static int
2041 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2042 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2043 __rte_unused uint8_t is_rx)
2044 {
2045         return 0;
2046 }
2047
2048 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2049 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2050 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2051
2052 RTE_INIT(virtio_init_log);
2053 static void
2054 virtio_init_log(void)
2055 {
2056         virtio_logtype_init = rte_log_register("pmd.virtio.init");
2057         if (virtio_logtype_init >= 0)
2058                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2059         virtio_logtype_driver = rte_log_register("pmd.virtio.driver");
2060         if (virtio_logtype_driver >= 0)
2061                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2062 }