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 #include "virtio_user/virtio_user_dev.h"
  39
  40 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  41 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  42 static int  virtio_dev_start(struct rte_eth_dev *dev);
  43 static void virtio_dev_stop(struct rte_eth_dev *dev);
  44 static int virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  45 static int virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  46 static int virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  47 static int virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  48 static uint32_t virtio_dev_speed_capa_get(uint32_t speed);
  49 static int virtio_dev_devargs_parse(struct rte_devargs *devargs,
  50         int *vdpa,
  51         uint32_t *speed,
  52         int *vectorized);
  53 static int virtio_dev_info_get(struct rte_eth_dev *dev,
  54                                 struct rte_eth_dev_info *dev_info);
  55 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  56         int wait_to_complete);
  57 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  58
  59 static void virtio_set_hwaddr(struct virtio_hw *hw);
  60 static void virtio_get_hwaddr(struct virtio_hw *hw);
  61
  62 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  63                                  struct rte_eth_stats *stats);
  64 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  65                                  struct rte_eth_xstat *xstats, unsigned n);
  66 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  67                                        struct rte_eth_xstat_name *xstats_names,
  68                                        unsigned limit);
  69 static int virtio_dev_stats_reset(struct rte_eth_dev *dev);
  70 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  71 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  72                                 uint16_t vlan_id, int on);
  73 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  74                                 struct rte_ether_addr *mac_addr,
  75                                 uint32_t index, uint32_t vmdq);
  76 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  77 static int virtio_mac_addr_set(struct rte_eth_dev *dev,
  78                                 struct rte_ether_addr *mac_addr);
  79
  80 static int virtio_intr_disable(struct rte_eth_dev *dev);
  81
  82 static int virtio_dev_queue_stats_mapping_set(
  83         struct rte_eth_dev *eth_dev,
  84         uint16_t queue_id,
  85         uint8_t stat_idx,
  86         uint8_t is_rx);
  87
  88 int virtio_logtype_init;
  89 int virtio_logtype_driver;
  90
  91 static void virtio_notify_peers(struct rte_eth_dev *dev);
  92 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  93
  94 /*
  95  * The set of PCI devices this driver supports
  96  */
  97 static const struct rte_pci_id pci_id_virtio_map[] = {
  98         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  99         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 100         { .vendor_id = 0, /* sentinel */ },
 101 };
 102
 103 struct rte_virtio_xstats_name_off {
 104         char name[RTE_ETH_XSTATS_NAME_SIZE];
 105         unsigned offset;
 106 };
 107
 108 /* [rt]x_qX_ is prepended to the name string here */
 109 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 110         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 111         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 112         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 113         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 114         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 115         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 116         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 117         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 118         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 119         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 120         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 121         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 122         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 123 };
 124
 125 /* [rt]x_qX_ is prepended to the name string here */
 126 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 127         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 128         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 129         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 130         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 131         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 132         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 133         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 134         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 135         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 136         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 137         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 138         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 139 };
 140
 141 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 142                             sizeof(rte_virtio_rxq_stat_strings[0]))
 143 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 144                             sizeof(rte_virtio_txq_stat_strings[0]))
 145
 146 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 147
 148 static struct virtio_pmd_ctrl *
 149 virtio_send_command_packed(struct virtnet_ctl *cvq,
 150                            struct virtio_pmd_ctrl *ctrl,
 151                            int *dlen, int pkt_num)
 152 {
 153         struct virtqueue *vq = cvq->vq;
 154         int head;
 155         struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
 156         struct virtio_pmd_ctrl *result;
 157         uint16_t flags;
 158         int sum = 0;
 159         int nb_descs = 0;
 160         int k;
 161
 162         /*
 163          * Format is enforced in qemu code:
 164          * One TX packet for header;
 165          * At least one TX packet per argument;
 166          * One RX packet for ACK.
 167          */
 168         head = vq->vq_avail_idx;
 169         flags = vq->vq_packed.cached_flags;
 170         desc[head].addr = cvq->virtio_net_hdr_mem;
 171         desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 172         vq->vq_free_cnt--;
 173         nb_descs++;
 174         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 175                 vq->vq_avail_idx -= vq->vq_nentries;
 176                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 177         }
 178
 179         for (k = 0; k < pkt_num; k++) {
 180                 desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 181                         + sizeof(struct virtio_net_ctrl_hdr)
 182                         + sizeof(ctrl->status) + sizeof(uint8_t) * sum;
 183                 desc[vq->vq_avail_idx].len = dlen[k];
 184                 desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
 185                         vq->vq_packed.cached_flags;
 186                 sum += dlen[k];
 187                 vq->vq_free_cnt--;
 188                 nb_descs++;
 189                 if (++vq->vq_avail_idx >= vq->vq_nentries) {
 190                         vq->vq_avail_idx -= vq->vq_nentries;
 191                         vq->vq_packed.cached_flags ^=
 192                                 VRING_PACKED_DESC_F_AVAIL_USED;
 193                 }
 194         }
 195
 196         desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
 197                 + sizeof(struct virtio_net_ctrl_hdr);
 198         desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
 199         desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
 200                 vq->vq_packed.cached_flags;
 201         vq->vq_free_cnt--;
 202         nb_descs++;
 203         if (++vq->vq_avail_idx >= vq->vq_nentries) {
 204                 vq->vq_avail_idx -= vq->vq_nentries;
 205                 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
 206         }
 207
 208         virtio_wmb(vq->hw->weak_barriers);
 209         desc[head].flags = VRING_DESC_F_NEXT | flags;
 210
 211         virtio_wmb(vq->hw->weak_barriers);
 212         virtqueue_notify(vq);
 213
 214         /* wait for used descriptors in virtqueue */
 215         while (!desc_is_used(&desc[head], vq))
 216                 usleep(100);
 217
 218         virtio_rmb(vq->hw->weak_barriers);
 219
 220         /* now get used descriptors */
 221         vq->vq_free_cnt += nb_descs;
 222         vq->vq_used_cons_idx += nb_descs;
 223         if (vq->vq_used_cons_idx >= vq->vq_nentries) {
 224                 vq->vq_used_cons_idx -= vq->vq_nentries;
 225                 vq->vq_packed.used_wrap_counter ^= 1;
 226         }
 227
 228         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
 229                         "vq->vq_avail_idx=%d\n"
 230                         "vq->vq_used_cons_idx=%d\n"
 231                         "vq->vq_packed.cached_flags=0x%x\n"
 232                         "vq->vq_packed.used_wrap_counter=%d\n",
 233                         vq->vq_free_cnt,
 234                         vq->vq_avail_idx,
 235                         vq->vq_used_cons_idx,
 236                         vq->vq_packed.cached_flags,
 237                         vq->vq_packed.used_wrap_counter);
 238
 239         result = cvq->virtio_net_hdr_mz->addr;
 240         return result;
 241 }
 242
 243 static struct virtio_pmd_ctrl *
 244 virtio_send_command_split(struct virtnet_ctl *cvq,
 245                           struct virtio_pmd_ctrl *ctrl,
 246                           int *dlen, int pkt_num)
 247 {
 248         struct virtio_pmd_ctrl *result;
 249         struct virtqueue *vq = cvq->vq;
 250         uint32_t head, i;
 251         int k, sum = 0;
 252
 253         head = vq->vq_desc_head_idx;
 254
 255         /*
 256          * Format is enforced in qemu code:
 257          * One TX packet for header;
 258          * At least one TX packet per argument;
 259          * One RX packet for ACK.
 260          */
 261         vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
 262         vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 263         vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 264         vq->vq_free_cnt--;
 265         i = vq->vq_split.ring.desc[head].next;
 266
 267         for (k = 0; k < pkt_num; k++) {
 268                 vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
 269                 vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 270                         + sizeof(struct virtio_net_ctrl_hdr)
 271                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 272                 vq->vq_split.ring.desc[i].len = dlen[k];
 273                 sum += dlen[k];
 274                 vq->vq_free_cnt--;
 275                 i = vq->vq_split.ring.desc[i].next;
 276         }
 277
 278         vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
 279         vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
 280                         + sizeof(struct virtio_net_ctrl_hdr);
 281         vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
 282         vq->vq_free_cnt--;
 283
 284         vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
 285
 286         vq_update_avail_ring(vq, head);
 287         vq_update_avail_idx(vq);
 288
 289         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 290
 291         virtqueue_notify(vq);
 292
 293         while (virtqueue_nused(vq) == 0)
 294                 usleep(100);
 295
 296         while (virtqueue_nused(vq)) {
 297                 uint32_t idx, desc_idx, used_idx;
 298                 struct vring_used_elem *uep;
 299
 300                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 301                                 & (vq->vq_nentries - 1));
 302                 uep = &vq->vq_split.ring.used->ring[used_idx];
 303                 idx = (uint32_t) uep->id;
 304                 desc_idx = idx;
 305
 306                 while (vq->vq_split.ring.desc[desc_idx].flags &
 307                                 VRING_DESC_F_NEXT) {
 308                         desc_idx = vq->vq_split.ring.desc[desc_idx].next;
 309                         vq->vq_free_cnt++;
 310                 }
 311
 312                 vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 313                 vq->vq_desc_head_idx = idx;
 314
 315                 vq->vq_used_cons_idx++;
 316                 vq->vq_free_cnt++;
 317         }
 318
 319         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 320                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 321
 322         result = cvq->virtio_net_hdr_mz->addr;
 323         return result;
 324 }
 325
 326 static int
 327 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 328                     int *dlen, int pkt_num)
 329 {
 330         virtio_net_ctrl_ack status = ~0;
 331         struct virtio_pmd_ctrl *result;
 332         struct virtqueue *vq;
 333
 334         ctrl->status = status;
 335
 336         if (!cvq || !cvq->vq) {
 337                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 338                 return -1;
 339         }
 340
 341         rte_spinlock_lock(&cvq->lock);
 342         vq = cvq->vq;
 343
 344         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 345                 "vq->hw->cvq = %p vq = %p",
 346                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 347
 348         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 349                 rte_spinlock_unlock(&cvq->lock);
 350                 return -1;
 351         }
 352
 353         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 354                 sizeof(struct virtio_pmd_ctrl));
 355
 356         if (vtpci_packed_queue(vq->hw))
 357                 result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
 358         else
 359                 result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
 360
 361         rte_spinlock_unlock(&cvq->lock);
 362         return result->status;
 363 }
 364
 365 static int
 366 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 367 {
 368         struct virtio_hw *hw = dev->data->dev_private;
 369         struct virtio_pmd_ctrl ctrl;
 370         int dlen[1];
 371         int ret;
 372
 373         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 374         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 375         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 376
 377         dlen[0] = sizeof(uint16_t);
 378
 379         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 380         if (ret) {
 381                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 382                           "failed, this is too late now...");
 383                 return -EINVAL;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static void
 390 virtio_dev_queue_release(void *queue __rte_unused)
 391 {
 392         /* do nothing */
 393 }
 394
 395 static uint16_t
 396 virtio_get_nr_vq(struct virtio_hw *hw)
 397 {
 398         uint16_t nr_vq = hw->max_queue_pairs * 2;
 399
 400         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 401                 nr_vq += 1;
 402
 403         return nr_vq;
 404 }
 405
 406 static void
 407 virtio_init_vring(struct virtqueue *vq)
 408 {
 409         int size = vq->vq_nentries;
 410         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 411
 412         PMD_INIT_FUNC_TRACE();
 413
 414         memset(ring_mem, 0, vq->vq_ring_size);
 415
 416         vq->vq_used_cons_idx = 0;
 417         vq->vq_desc_head_idx = 0;
 418         vq->vq_avail_idx = 0;
 419         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 420         vq->vq_free_cnt = vq->vq_nentries;
 421         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 422         if (vtpci_packed_queue(vq->hw)) {
 423                 vring_init_packed(&vq->vq_packed.ring, ring_mem,
 424                                   VIRTIO_PCI_VRING_ALIGN, size);
 425                 vring_desc_init_packed(vq, size);
 426         } else {
 427                 struct vring *vr = &vq->vq_split.ring;
 428
 429                 vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size);
 430                 vring_desc_init_split(vr->desc, size);
 431         }
 432         /*
 433          * Disable device(host) interrupting guest
 434          */
 435         virtqueue_disable_intr(vq);
 436 }
 437
 438 static int
 439 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 440 {
 441         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 442         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 443         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 444         unsigned int vq_size, size;
 445         struct virtio_hw *hw = dev->data->dev_private;
 446         struct virtnet_rx *rxvq = NULL;
 447         struct virtnet_tx *txvq = NULL;
 448         struct virtnet_ctl *cvq = NULL;
 449         struct virtqueue *vq;
 450         size_t sz_hdr_mz = 0;
 451         void *sw_ring = NULL;
 452         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 453         int ret;
 454         int numa_node = dev->device->numa_node;
 455
 456         PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
 457                         vtpci_queue_idx, numa_node);
 458
 459         /*
 460          * Read the virtqueue size from the Queue Size field
 461          * Always power of 2 and if 0 virtqueue does not exist
 462          */
 463         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 464         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 465         if (vq_size == 0) {
 466                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 467                 return -EINVAL;
 468         }
 469
 470         if (!vtpci_packed_queue(hw) && !rte_is_power_of_2(vq_size)) {
 471                 PMD_INIT_LOG(ERR, "split virtqueue size is not power of 2");
 472                 return -EINVAL;
 473         }
 474
 475         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 476                  dev->data->port_id, vtpci_queue_idx);
 477
 478         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 479                                 vq_size * sizeof(struct vq_desc_extra),
 480                                 RTE_CACHE_LINE_SIZE);
 481         if (queue_type == VTNET_TQ) {
 482                 /*
 483                  * For each xmit packet, allocate a virtio_net_hdr
 484                  * and indirect ring elements
 485                  */
 486                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 487         } else if (queue_type == VTNET_CQ) {
 488                 /* Allocate a page for control vq command, data and status */
 489                 sz_hdr_mz = PAGE_SIZE;
 490         }
 491
 492         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 493                                 numa_node);
 494         if (vq == NULL) {
 495                 PMD_INIT_LOG(ERR, "can not allocate vq");
 496                 return -ENOMEM;
 497         }
 498         hw->vqs[vtpci_queue_idx] = vq;
 499
 500         vq->hw = hw;
 501         vq->vq_queue_index = vtpci_queue_idx;
 502         vq->vq_nentries = vq_size;
 503         if (vtpci_packed_queue(hw)) {
 504                 vq->vq_packed.used_wrap_counter = 1;
 505                 vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
 506                 vq->vq_packed.event_flags_shadow = 0;
 507                 if (queue_type == VTNET_RQ)
 508                         vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
 509         }
 510
 511         /*
 512          * Reserve a memzone for vring elements
 513          */
 514         size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN);
 515         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 516         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 517                      size, vq->vq_ring_size);
 518
 519         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 520                         numa_node, RTE_MEMZONE_IOVA_CONTIG,
 521                         VIRTIO_PCI_VRING_ALIGN);
 522         if (mz == NULL) {
 523                 if (rte_errno == EEXIST)
 524                         mz = rte_memzone_lookup(vq_name);
 525                 if (mz == NULL) {
 526                         ret = -ENOMEM;
 527                         goto fail_q_alloc;
 528                 }
 529         }
 530
 531         memset(mz->addr, 0, mz->len);
 532
 533         vq->vq_ring_mem = mz->iova;
 534         vq->vq_ring_virt_mem = mz->addr;
 535         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 536                      (uint64_t)mz->iova);
 537         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 538                      (uint64_t)(uintptr_t)mz->addr);
 539
 540         virtio_init_vring(vq);
 541
 542         if (sz_hdr_mz) {
 543                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 544                          dev->data->port_id, vtpci_queue_idx);
 545                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 546                                 numa_node, RTE_MEMZONE_IOVA_CONTIG,
 547                                 RTE_CACHE_LINE_SIZE);
 548                 if (hdr_mz == NULL) {
 549                         if (rte_errno == EEXIST)
 550                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 551                         if (hdr_mz == NULL) {
 552                                 ret = -ENOMEM;
 553                                 goto fail_q_alloc;
 554                         }
 555                 }
 556         }
 557
 558         if (queue_type == VTNET_RQ) {
 559                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 560                                sizeof(vq->sw_ring[0]);
 561
 562                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 563                                 RTE_CACHE_LINE_SIZE, numa_node);
 564                 if (!sw_ring) {
 565                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 566                         ret = -ENOMEM;
 567                         goto fail_q_alloc;
 568                 }
 569
 570                 vq->sw_ring = sw_ring;
 571                 rxvq = &vq->rxq;
 572                 rxvq->vq = vq;
 573                 rxvq->port_id = dev->data->port_id;
 574                 rxvq->mz = mz;
 575         } else if (queue_type == VTNET_TQ) {
 576                 txvq = &vq->txq;
 577                 txvq->vq = vq;
 578                 txvq->port_id = dev->data->port_id;
 579                 txvq->mz = mz;
 580                 txvq->virtio_net_hdr_mz = hdr_mz;
 581                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 582         } else if (queue_type == VTNET_CQ) {
 583                 cvq = &vq->cq;
 584                 cvq->vq = vq;
 585                 cvq->mz = mz;
 586                 cvq->virtio_net_hdr_mz = hdr_mz;
 587                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 588                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 589
 590                 hw->cvq = cvq;
 591         }
 592
 593         /* For virtio_user case (that is when hw->virtio_user_dev is not NULL),
 594          * we use virtual address. And we need properly set _offset_, please see
 595          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 596          */
 597         if (!hw->virtio_user_dev)
 598                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 599         else {
 600                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 601                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 602                 if (queue_type == VTNET_TQ)
 603                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 604                 else if (queue_type == VTNET_CQ)
 605                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 606         }
 607
 608         if (queue_type == VTNET_TQ) {
 609                 struct virtio_tx_region *txr;
 610                 unsigned int i;
 611
 612                 txr = hdr_mz->addr;
 613                 memset(txr, 0, vq_size * sizeof(*txr));
 614                 for (i = 0; i < vq_size; i++) {
 615                         struct vring_desc *start_dp = txr[i].tx_indir;
 616
 617                         /* first indirect descriptor is always the tx header */
 618                         if (!vtpci_packed_queue(hw)) {
 619                                 vring_desc_init_split(start_dp,
 620                                                       RTE_DIM(txr[i].tx_indir));
 621                                 start_dp->addr = txvq->virtio_net_hdr_mem
 622                                         + i * sizeof(*txr)
 623                                         + offsetof(struct virtio_tx_region,
 624                                                    tx_hdr);
 625                                 start_dp->len = hw->vtnet_hdr_size;
 626                                 start_dp->flags = VRING_DESC_F_NEXT;
 627                         }
 628                 }
 629         }
 630
 631         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 632                 PMD_INIT_LOG(ERR, "setup_queue failed");
 633                 return -EINVAL;
 634         }
 635
 636         return 0;
 637
 638 fail_q_alloc:
 639         rte_free(sw_ring);
 640         rte_memzone_free(hdr_mz);
 641         rte_memzone_free(mz);
 642         rte_free(vq);
 643
 644         return ret;
 645 }
 646
 647 static void
 648 virtio_free_queues(struct virtio_hw *hw)
 649 {
 650         uint16_t nr_vq = virtio_get_nr_vq(hw);
 651         struct virtqueue *vq;
 652         int queue_type;
 653         uint16_t i;
 654
 655         if (hw->vqs == NULL)
 656                 return;
 657
 658         for (i = 0; i < nr_vq; i++) {
 659                 vq = hw->vqs[i];
 660                 if (!vq)
 661                         continue;
 662
 663                 queue_type = virtio_get_queue_type(hw, i);
 664                 if (queue_type == VTNET_RQ) {
 665                         rte_free(vq->sw_ring);
 666                         rte_memzone_free(vq->rxq.mz);
 667                 } else if (queue_type == VTNET_TQ) {
 668                         rte_memzone_free(vq->txq.mz);
 669                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 670                 } else {
 671                         rte_memzone_free(vq->cq.mz);
 672                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 673                 }
 674
 675                 rte_free(vq);
 676                 hw->vqs[i] = NULL;
 677         }
 678
 679         rte_free(hw->vqs);
 680         hw->vqs = NULL;
 681 }
 682
 683 static int
 684 virtio_alloc_queues(struct rte_eth_dev *dev)
 685 {
 686         struct virtio_hw *hw = dev->data->dev_private;
 687         uint16_t nr_vq = virtio_get_nr_vq(hw);
 688         uint16_t i;
 689         int ret;
 690
 691         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 692         if (!hw->vqs) {
 693                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 694                 return -ENOMEM;
 695         }
 696
 697         for (i = 0; i < nr_vq; i++) {
 698                 ret = virtio_init_queue(dev, i);
 699                 if (ret < 0) {
 700                         virtio_free_queues(hw);
 701                         return ret;
 702                 }
 703         }
 704
 705         return 0;
 706 }
 707
 708 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 709
 710 static void
 711 virtio_dev_close(struct rte_eth_dev *dev)
 712 {
 713         struct virtio_hw *hw = dev->data->dev_private;
 714         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 715
 716         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 717
 718         if (!hw->opened)
 719                 return;
 720         hw->opened = false;
 721
 722         /* reset the NIC */
 723         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 724                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 725         if (intr_conf->rxq)
 726                 virtio_queues_unbind_intr(dev);
 727
 728         if (intr_conf->lsc || intr_conf->rxq) {
 729                 virtio_intr_disable(dev);
 730                 rte_intr_efd_disable(dev->intr_handle);
 731                 rte_free(dev->intr_handle->intr_vec);
 732                 dev->intr_handle->intr_vec = NULL;
 733         }
 734
 735         vtpci_reset(hw);
 736         virtio_dev_free_mbufs(dev);
 737         virtio_free_queues(hw);
 738
 739 #ifdef RTE_VIRTIO_USER
 740         if (hw->virtio_user_dev)
 741                 virtio_user_dev_uninit(hw->virtio_user_dev);
 742         else
 743 #endif
 744         if (dev->device) {
 745                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(dev));
 746                 if (!hw->modern)
 747                         rte_pci_ioport_unmap(VTPCI_IO(hw));
 748         }
 749 }
 750
 751 static int
 752 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 753 {
 754         struct virtio_hw *hw = dev->data->dev_private;
 755         struct virtio_pmd_ctrl ctrl;
 756         int dlen[1];
 757         int ret;
 758
 759         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 760                 PMD_INIT_LOG(INFO, "host does not support rx control");
 761                 return -ENOTSUP;
 762         }
 763
 764         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 765         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 766         ctrl.data[0] = 1;
 767         dlen[0] = 1;
 768
 769         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 770         if (ret) {
 771                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 772                 return -EAGAIN;
 773         }
 774
 775         return 0;
 776 }
 777
 778 static int
 779 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 780 {
 781         struct virtio_hw *hw = dev->data->dev_private;
 782         struct virtio_pmd_ctrl ctrl;
 783         int dlen[1];
 784         int ret;
 785
 786         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 787                 PMD_INIT_LOG(INFO, "host does not support rx control");
 788                 return -ENOTSUP;
 789         }
 790
 791         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 792         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 793         ctrl.data[0] = 0;
 794         dlen[0] = 1;
 795
 796         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 797         if (ret) {
 798                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 799                 return -EAGAIN;
 800         }
 801
 802         return 0;
 803 }
 804
 805 static int
 806 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 807 {
 808         struct virtio_hw *hw = dev->data->dev_private;
 809         struct virtio_pmd_ctrl ctrl;
 810         int dlen[1];
 811         int ret;
 812
 813         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 814                 PMD_INIT_LOG(INFO, "host does not support rx control");
 815                 return -ENOTSUP;
 816         }
 817
 818         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 819         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 820         ctrl.data[0] = 1;
 821         dlen[0] = 1;
 822
 823         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 824         if (ret) {
 825                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 826                 return -EAGAIN;
 827         }
 828
 829         return 0;
 830 }
 831
 832 static int
 833 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 834 {
 835         struct virtio_hw *hw = dev->data->dev_private;
 836         struct virtio_pmd_ctrl ctrl;
 837         int dlen[1];
 838         int ret;
 839
 840         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 841                 PMD_INIT_LOG(INFO, "host does not support rx control");
 842                 return -ENOTSUP;
 843         }
 844
 845         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 846         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 847         ctrl.data[0] = 0;
 848         dlen[0] = 1;
 849
 850         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 851         if (ret) {
 852                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 853                 return -EAGAIN;
 854         }
 855
 856         return 0;
 857 }
 858
 859 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 860 static int
 861 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 862 {
 863         struct virtio_hw *hw = dev->data->dev_private;
 864         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
 865                                  hw->vtnet_hdr_size;
 866         uint32_t frame_size = mtu + ether_hdr_len;
 867         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 868
 869         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 870
 871         if (mtu < RTE_ETHER_MIN_MTU || frame_size > max_frame_size) {
 872                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 873                         RTE_ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 874                 return -EINVAL;
 875         }
 876         return 0;
 877 }
 878
 879 static int
 880 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 881 {
 882         struct virtio_hw *hw = dev->data->dev_private;
 883         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 884         struct virtqueue *vq = rxvq->vq;
 885
 886         virtqueue_enable_intr(vq);
 887         virtio_mb(hw->weak_barriers);
 888         return 0;
 889 }
 890
 891 static int
 892 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 893 {
 894         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 895         struct virtqueue *vq = rxvq->vq;
 896
 897         virtqueue_disable_intr(vq);
 898         return 0;
 899 }
 900
 901 /*
 902  * dev_ops for virtio, bare necessities for basic operation
 903  */
 904 static const struct eth_dev_ops virtio_eth_dev_ops = {
 905         .dev_configure           = virtio_dev_configure,
 906         .dev_start               = virtio_dev_start,
 907         .dev_stop                = virtio_dev_stop,
 908         .dev_close               = virtio_dev_close,
 909         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 910         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 911         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 912         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 913         .mtu_set                 = virtio_mtu_set,
 914         .dev_infos_get           = virtio_dev_info_get,
 915         .stats_get               = virtio_dev_stats_get,
 916         .xstats_get              = virtio_dev_xstats_get,
 917         .xstats_get_names        = virtio_dev_xstats_get_names,
 918         .stats_reset             = virtio_dev_stats_reset,
 919         .xstats_reset            = virtio_dev_stats_reset,
 920         .link_update             = virtio_dev_link_update,
 921         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 922         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 923         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 924         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 925         .rx_queue_release        = virtio_dev_queue_release,
 926         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 927         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 928         .tx_queue_release        = virtio_dev_queue_release,
 929         /* collect stats per queue */
 930         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 931         .vlan_filter_set         = virtio_vlan_filter_set,
 932         .mac_addr_add            = virtio_mac_addr_add,
 933         .mac_addr_remove         = virtio_mac_addr_remove,
 934         .mac_addr_set            = virtio_mac_addr_set,
 935 };
 936
 937 /*
 938  * dev_ops for virtio-user in secondary processes, as we just have
 939  * some limited supports currently.
 940  */
 941 const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
 942         .dev_infos_get           = virtio_dev_info_get,
 943         .stats_get               = virtio_dev_stats_get,
 944         .xstats_get              = virtio_dev_xstats_get,
 945         .xstats_get_names        = virtio_dev_xstats_get_names,
 946         .stats_reset             = virtio_dev_stats_reset,
 947         .xstats_reset            = virtio_dev_stats_reset,
 948         /* collect stats per queue */
 949         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 950 };
 951
 952 static void
 953 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 954 {
 955         unsigned i;
 956
 957         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 958                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 959                 if (txvq == NULL)
 960                         continue;
 961
 962                 stats->opackets += txvq->stats.packets;
 963                 stats->obytes += txvq->stats.bytes;
 964
 965                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 966                         stats->q_opackets[i] = txvq->stats.packets;
 967                         stats->q_obytes[i] = txvq->stats.bytes;
 968                 }
 969         }
 970
 971         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 972                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 973                 if (rxvq == NULL)
 974                         continue;
 975
 976                 stats->ipackets += rxvq->stats.packets;
 977                 stats->ibytes += rxvq->stats.bytes;
 978                 stats->ierrors += rxvq->stats.errors;
 979
 980                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 981                         stats->q_ipackets[i] = rxvq->stats.packets;
 982                         stats->q_ibytes[i] = rxvq->stats.bytes;
 983                 }
 984         }
 985
 986         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 987 }
 988
 989 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 990                                        struct rte_eth_xstat_name *xstats_names,
 991                                        __rte_unused unsigned limit)
 992 {
 993         unsigned i;
 994         unsigned count = 0;
 995         unsigned t;
 996
 997         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 998                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 999
1000         if (xstats_names != NULL) {
1001                 /* Note: limit checked in rte_eth_xstats_names() */
1002
1003                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
1004                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1005                         if (rxvq == NULL)
1006                                 continue;
1007                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1008                                 snprintf(xstats_names[count].name,
1009                                         sizeof(xstats_names[count].name),
1010                                         "rx_q%u_%s", i,
1011                                         rte_virtio_rxq_stat_strings[t].name);
1012                                 count++;
1013                         }
1014                 }
1015
1016                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
1017                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
1018                         if (txvq == NULL)
1019                                 continue;
1020                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1021                                 snprintf(xstats_names[count].name,
1022                                         sizeof(xstats_names[count].name),
1023                                         "tx_q%u_%s", i,
1024                                         rte_virtio_txq_stat_strings[t].name);
1025                                 count++;
1026                         }
1027                 }
1028                 return count;
1029         }
1030         return nstats;
1031 }
1032
1033 static int
1034 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
1035                       unsigned n)
1036 {
1037         unsigned i;
1038         unsigned count = 0;
1039
1040         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
1041                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
1042
1043         if (n < nstats)
1044                 return nstats;
1045
1046         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1047                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1048
1049                 if (rxvq == NULL)
1050                         continue;
1051
1052                 unsigned t;
1053
1054                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
1055                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
1056                                 rte_virtio_rxq_stat_strings[t].offset);
1057                         xstats[count].id = count;
1058                         count++;
1059                 }
1060         }
1061
1062         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1063                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1064
1065                 if (txvq == NULL)
1066                         continue;
1067
1068                 unsigned t;
1069
1070                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
1071                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
1072                                 rte_virtio_txq_stat_strings[t].offset);
1073                         xstats[count].id = count;
1074                         count++;
1075                 }
1076         }
1077
1078         return count;
1079 }
1080
1081 static int
1082 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
1083 {
1084         virtio_update_stats(dev, stats);
1085
1086         return 0;
1087 }
1088
1089 static int
1090 virtio_dev_stats_reset(struct rte_eth_dev *dev)
1091 {
1092         unsigned int i;
1093
1094         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1095                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1096                 if (txvq == NULL)
1097                         continue;
1098
1099                 txvq->stats.packets = 0;
1100                 txvq->stats.bytes = 0;
1101                 txvq->stats.multicast = 0;
1102                 txvq->stats.broadcast = 0;
1103                 memset(txvq->stats.size_bins, 0,
1104                        sizeof(txvq->stats.size_bins[0]) * 8);
1105         }
1106
1107         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1108                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1109                 if (rxvq == NULL)
1110                         continue;
1111
1112                 rxvq->stats.packets = 0;
1113                 rxvq->stats.bytes = 0;
1114                 rxvq->stats.errors = 0;
1115                 rxvq->stats.multicast = 0;
1116                 rxvq->stats.broadcast = 0;
1117                 memset(rxvq->stats.size_bins, 0,
1118                        sizeof(rxvq->stats.size_bins[0]) * 8);
1119         }
1120
1121         return 0;
1122 }
1123
1124 static void
1125 virtio_set_hwaddr(struct virtio_hw *hw)
1126 {
1127         vtpci_write_dev_config(hw,
1128                         offsetof(struct virtio_net_config, mac),
1129                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1130 }
1131
1132 static void
1133 virtio_get_hwaddr(struct virtio_hw *hw)
1134 {
1135         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1136                 vtpci_read_dev_config(hw,
1137                         offsetof(struct virtio_net_config, mac),
1138                         &hw->mac_addr, RTE_ETHER_ADDR_LEN);
1139         } else {
1140                 rte_eth_random_addr(&hw->mac_addr[0]);
1141                 virtio_set_hwaddr(hw);
1142         }
1143 }
1144
1145 static int
1146 virtio_mac_table_set(struct virtio_hw *hw,
1147                      const struct virtio_net_ctrl_mac *uc,
1148                      const struct virtio_net_ctrl_mac *mc)
1149 {
1150         struct virtio_pmd_ctrl ctrl;
1151         int err, len[2];
1152
1153         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1154                 PMD_DRV_LOG(INFO, "host does not support mac table");
1155                 return -1;
1156         }
1157
1158         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1159         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1160
1161         len[0] = uc->entries * RTE_ETHER_ADDR_LEN + sizeof(uc->entries);
1162         memcpy(ctrl.data, uc, len[0]);
1163
1164         len[1] = mc->entries * RTE_ETHER_ADDR_LEN + sizeof(mc->entries);
1165         memcpy(ctrl.data + len[0], mc, len[1]);
1166
1167         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1168         if (err != 0)
1169                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1170         return err;
1171 }
1172
1173 static int
1174 virtio_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
1175                     uint32_t index, uint32_t vmdq __rte_unused)
1176 {
1177         struct virtio_hw *hw = dev->data->dev_private;
1178         const struct rte_ether_addr *addrs = dev->data->mac_addrs;
1179         unsigned int i;
1180         struct virtio_net_ctrl_mac *uc, *mc;
1181
1182         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1183                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1184                 return -EINVAL;
1185         }
1186
1187         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1188                 sizeof(uc->entries));
1189         uc->entries = 0;
1190         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1191                 sizeof(mc->entries));
1192         mc->entries = 0;
1193
1194         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1195                 const struct rte_ether_addr *addr
1196                         = (i == index) ? mac_addr : addrs + i;
1197                 struct virtio_net_ctrl_mac *tbl
1198                         = rte_is_multicast_ether_addr(addr) ? mc : uc;
1199
1200                 memcpy(&tbl->macs[tbl->entries++], addr, RTE_ETHER_ADDR_LEN);
1201         }
1202
1203         return virtio_mac_table_set(hw, uc, mc);
1204 }
1205
1206 static void
1207 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1208 {
1209         struct virtio_hw *hw = dev->data->dev_private;
1210         struct rte_ether_addr *addrs = dev->data->mac_addrs;
1211         struct virtio_net_ctrl_mac *uc, *mc;
1212         unsigned int i;
1213
1214         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1215                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1216                 return;
1217         }
1218
1219         uc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1220                 sizeof(uc->entries));
1221         uc->entries = 0;
1222         mc = alloca(VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN +
1223                 sizeof(mc->entries));
1224         mc->entries = 0;
1225
1226         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1227                 struct virtio_net_ctrl_mac *tbl;
1228
1229                 if (i == index || rte_is_zero_ether_addr(addrs + i))
1230                         continue;
1231
1232                 tbl = rte_is_multicast_ether_addr(addrs + i) ? mc : uc;
1233                 memcpy(&tbl->macs[tbl->entries++], addrs + i,
1234                         RTE_ETHER_ADDR_LEN);
1235         }
1236
1237         virtio_mac_table_set(hw, uc, mc);
1238 }
1239
1240 static int
1241 virtio_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1242 {
1243         struct virtio_hw *hw = dev->data->dev_private;
1244
1245         memcpy(hw->mac_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1246
1247         /* Use atomic update if available */
1248         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1249                 struct virtio_pmd_ctrl ctrl;
1250                 int len = RTE_ETHER_ADDR_LEN;
1251
1252                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1253                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1254
1255                 memcpy(ctrl.data, mac_addr, RTE_ETHER_ADDR_LEN);
1256                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1257         }
1258
1259         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1260                 return -ENOTSUP;
1261
1262         virtio_set_hwaddr(hw);
1263         return 0;
1264 }
1265
1266 static int
1267 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1268 {
1269         struct virtio_hw *hw = dev->data->dev_private;
1270         struct virtio_pmd_ctrl ctrl;
1271         int len;
1272
1273         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1274                 return -ENOTSUP;
1275
1276         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1277         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1278         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1279         len = sizeof(vlan_id);
1280
1281         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1282 }
1283
1284 static int
1285 virtio_intr_unmask(struct rte_eth_dev *dev)
1286 {
1287         struct virtio_hw *hw = dev->data->dev_private;
1288
1289         if (rte_intr_ack(dev->intr_handle) < 0)
1290                 return -1;
1291
1292         if (!hw->virtio_user_dev)
1293                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1294
1295         return 0;
1296 }
1297
1298 static int
1299 virtio_intr_enable(struct rte_eth_dev *dev)
1300 {
1301         struct virtio_hw *hw = dev->data->dev_private;
1302
1303         if (rte_intr_enable(dev->intr_handle) < 0)
1304                 return -1;
1305
1306         if (!hw->virtio_user_dev)
1307                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1308
1309         return 0;
1310 }
1311
1312 static int
1313 virtio_intr_disable(struct rte_eth_dev *dev)
1314 {
1315         struct virtio_hw *hw = dev->data->dev_private;
1316
1317         if (rte_intr_disable(dev->intr_handle) < 0)
1318                 return -1;
1319
1320         if (!hw->virtio_user_dev)
1321                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1322
1323         return 0;
1324 }
1325
1326 static int
1327 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1328 {
1329         uint64_t host_features;
1330
1331         /* Prepare guest_features: feature that driver wants to support */
1332         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1333                 req_features);
1334
1335         /* Read device(host) feature bits */
1336         host_features = VTPCI_OPS(hw)->get_features(hw);
1337         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1338                 host_features);
1339
1340         /* If supported, ensure MTU value is valid before acknowledging it. */
1341         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1342                 struct virtio_net_config config;
1343
1344                 vtpci_read_dev_config(hw,
1345                         offsetof(struct virtio_net_config, mtu),
1346                         &config.mtu, sizeof(config.mtu));
1347
1348                 if (config.mtu < RTE_ETHER_MIN_MTU)
1349                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1350         }
1351
1352         /*
1353          * Negotiate features: Subset of device feature bits are written back
1354          * guest feature bits.
1355          */
1356         hw->guest_features = req_features;
1357         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1358         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1359                 hw->guest_features);
1360
1361         if (hw->modern) {
1362                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1363                         PMD_INIT_LOG(ERR,
1364                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1365                         return -1;
1366                 }
1367                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1368                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1369                         PMD_INIT_LOG(ERR,
1370                                 "failed to set FEATURES_OK status!");
1371                         return -1;
1372                 }
1373         }
1374
1375         hw->req_guest_features = req_features;
1376
1377         return 0;
1378 }
1379
1380 int
1381 virtio_dev_pause(struct rte_eth_dev *dev)
1382 {
1383         struct virtio_hw *hw = dev->data->dev_private;
1384
1385         rte_spinlock_lock(&hw->state_lock);
1386
1387         if (hw->started == 0) {
1388                 /* Device is just stopped. */
1389                 rte_spinlock_unlock(&hw->state_lock);
1390                 return -1;
1391         }
1392         hw->started = 0;
1393         /*
1394          * Prevent the worker threads from touching queues to avoid contention,
1395          * 1 ms should be enough for the ongoing Tx function to finish.
1396          */
1397         rte_delay_ms(1);
1398         return 0;
1399 }
1400
1401 /*
1402  * Recover hw state to let the worker threads continue.
1403  */
1404 void
1405 virtio_dev_resume(struct rte_eth_dev *dev)
1406 {
1407         struct virtio_hw *hw = dev->data->dev_private;
1408
1409         hw->started = 1;
1410         rte_spinlock_unlock(&hw->state_lock);
1411 }
1412
1413 /*
1414  * Should be called only after device is paused.
1415  */
1416 int
1417 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1418                 int nb_pkts)
1419 {
1420         struct virtio_hw *hw = dev->data->dev_private;
1421         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1422         int ret;
1423
1424         hw->inject_pkts = tx_pkts;
1425         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1426         hw->inject_pkts = NULL;
1427
1428         return ret;
1429 }
1430
1431 static void
1432 virtio_notify_peers(struct rte_eth_dev *dev)
1433 {
1434         struct virtio_hw *hw = dev->data->dev_private;
1435         struct virtnet_rx *rxvq;
1436         struct rte_mbuf *rarp_mbuf;
1437
1438         if (!dev->data->rx_queues)
1439                 return;
1440
1441         rxvq = dev->data->rx_queues[0];
1442         if (!rxvq)
1443                 return;
1444
1445         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1446                         (struct rte_ether_addr *)hw->mac_addr);
1447         if (rarp_mbuf == NULL) {
1448                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1449                 return;
1450         }
1451
1452         /* If virtio port just stopped, no need to send RARP */
1453         if (virtio_dev_pause(dev) < 0) {
1454                 rte_pktmbuf_free(rarp_mbuf);
1455                 return;
1456         }
1457
1458         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1459         virtio_dev_resume(dev);
1460 }
1461
1462 static void
1463 virtio_ack_link_announce(struct rte_eth_dev *dev)
1464 {
1465         struct virtio_hw *hw = dev->data->dev_private;
1466         struct virtio_pmd_ctrl ctrl;
1467
1468         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1469         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1470
1471         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1472 }
1473
1474 /*
1475  * Process virtio config changed interrupt. Call the callback
1476  * if link state changed, generate gratuitous RARP packet if
1477  * the status indicates an ANNOUNCE.
1478  */
1479 void
1480 virtio_interrupt_handler(void *param)
1481 {
1482         struct rte_eth_dev *dev = param;
1483         struct virtio_hw *hw = dev->data->dev_private;
1484         uint8_t isr;
1485         uint16_t status;
1486
1487         /* Read interrupt status which clears interrupt */
1488         isr = vtpci_isr(hw);
1489         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1490
1491         if (virtio_intr_unmask(dev) < 0)
1492                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1493
1494         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1495                 if (virtio_dev_link_update(dev, 0) == 0)
1496                         _rte_eth_dev_callback_process(dev,
1497                                                       RTE_ETH_EVENT_INTR_LSC,
1498                                                       NULL);
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                                 &status, sizeof(status));
1504                         if (status & VIRTIO_NET_S_ANNOUNCE) {
1505                                 virtio_notify_peers(dev);
1506                                 if (hw->cvq)
1507                                         virtio_ack_link_announce(dev);
1508                         }
1509                 }
1510         }
1511 }
1512
1513 /* set rx and tx handlers according to what is supported */
1514 static void
1515 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1516 {
1517         struct virtio_hw *hw = eth_dev->data->dev_private;
1518
1519         eth_dev->tx_pkt_prepare = virtio_xmit_pkts_prepare;
1520         if (vtpci_packed_queue(hw)) {
1521                 PMD_INIT_LOG(INFO,
1522                         "virtio: using packed ring %s Tx path on port %u",
1523                         hw->use_vec_tx ? "vectorized" : "standard",
1524                         eth_dev->data->port_id);
1525                 if (hw->use_vec_tx)
1526                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed_vec;
1527                 else
1528                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
1529         } else {
1530                 if (hw->use_inorder_tx) {
1531                         PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
1532                                 eth_dev->data->port_id);
1533                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
1534                 } else {
1535                         PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1536                                 eth_dev->data->port_id);
1537                         eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1538                 }
1539         }
1540
1541         if (vtpci_packed_queue(hw)) {
1542                 if (hw->use_vec_rx) {
1543                         PMD_INIT_LOG(INFO,
1544                                 "virtio: using packed ring vectorized Rx path on port %u",
1545                                 eth_dev->data->port_id);
1546                         eth_dev->rx_pkt_burst =
1547                                 &virtio_recv_pkts_packed_vec;
1548                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1549                         PMD_INIT_LOG(INFO,
1550                                 "virtio: using packed ring mergeable buffer Rx path on port %u",
1551                                 eth_dev->data->port_id);
1552                         eth_dev->rx_pkt_burst =
1553                                 &virtio_recv_mergeable_pkts_packed;
1554                 } else {
1555                         PMD_INIT_LOG(INFO,
1556                                 "virtio: using packed ring standard Rx path on port %u",
1557                                 eth_dev->data->port_id);
1558                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
1559                 }
1560         } else {
1561                 if (hw->use_vec_rx) {
1562                         PMD_INIT_LOG(INFO, "virtio: using vectorized Rx path on port %u",
1563                                 eth_dev->data->port_id);
1564                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1565                 } else if (hw->use_inorder_rx) {
1566                         PMD_INIT_LOG(INFO,
1567                                 "virtio: using inorder Rx path on port %u",
1568                                 eth_dev->data->port_id);
1569                         eth_dev->rx_pkt_burst = &virtio_recv_pkts_inorder;
1570                 } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1571                         PMD_INIT_LOG(INFO,
1572                                 "virtio: using mergeable buffer Rx path on port %u",
1573                                 eth_dev->data->port_id);
1574                         eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1575                 } else {
1576                         PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1577                                 eth_dev->data->port_id);
1578                         eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1579                 }
1580         }
1581
1582 }
1583
1584 /* Only support 1:1 queue/interrupt mapping so far.
1585  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1586  * interrupt vectors (<N+1).
1587  */
1588 static int
1589 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1590 {
1591         uint32_t i;
1592         struct virtio_hw *hw = dev->data->dev_private;
1593
1594         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1595         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1596                 dev->intr_handle->intr_vec[i] = i + 1;
1597                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1598                                                  VIRTIO_MSI_NO_VECTOR) {
1599                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1600                         return -EBUSY;
1601                 }
1602         }
1603
1604         return 0;
1605 }
1606
1607 static void
1608 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1609 {
1610         uint32_t i;
1611         struct virtio_hw *hw = dev->data->dev_private;
1612
1613         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1614         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1615                 VTPCI_OPS(hw)->set_queue_irq(hw,
1616                                              hw->vqs[i * VTNET_CQ],
1617                                              VIRTIO_MSI_NO_VECTOR);
1618 }
1619
1620 static int
1621 virtio_configure_intr(struct rte_eth_dev *dev)
1622 {
1623         struct virtio_hw *hw = dev->data->dev_private;
1624
1625         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1626                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1627                 return -ENOTSUP;
1628         }
1629
1630         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1631                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1632                 return -1;
1633         }
1634
1635         if (!dev->intr_handle->intr_vec) {
1636                 dev->intr_handle->intr_vec =
1637                         rte_zmalloc("intr_vec",
1638                                     hw->max_queue_pairs * sizeof(int), 0);
1639                 if (!dev->intr_handle->intr_vec) {
1640                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1641                                      hw->max_queue_pairs);
1642                         return -ENOMEM;
1643                 }
1644         }
1645
1646         /* Re-register callback to update max_intr */
1647         rte_intr_callback_unregister(dev->intr_handle,
1648                                      virtio_interrupt_handler,
1649                                      dev);
1650         rte_intr_callback_register(dev->intr_handle,
1651                                    virtio_interrupt_handler,
1652                                    dev);
1653
1654         /* DO NOT try to remove this! This function will enable msix, or QEMU
1655          * will encounter SIGSEGV when DRIVER_OK is sent.
1656          * And for legacy devices, this should be done before queue/vec binding
1657          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1658          * (22) will be ignored.
1659          */
1660         if (virtio_intr_enable(dev) < 0) {
1661                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1662                 return -1;
1663         }
1664
1665         if (virtio_queues_bind_intr(dev) < 0) {
1666                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1667                 return -1;
1668         }
1669
1670         return 0;
1671 }
1672 #define SPEED_UNKNOWN    0xffffffff
1673 #define DUPLEX_UNKNOWN   0xff
1674 /* reset device and renegotiate features if needed */
1675 static int
1676 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1677 {
1678         struct virtio_hw *hw = eth_dev->data->dev_private;
1679         struct virtio_net_config *config;
1680         struct virtio_net_config local_config;
1681         struct rte_pci_device *pci_dev = NULL;
1682         int ret;
1683
1684         /* Reset the device although not necessary at startup */
1685         vtpci_reset(hw);
1686
1687         if (hw->vqs) {
1688                 virtio_dev_free_mbufs(eth_dev);
1689                 virtio_free_queues(hw);
1690         }
1691
1692         /* Tell the host we've noticed this device. */
1693         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1694
1695         /* Tell the host we've known how to drive the device. */
1696         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1697         if (virtio_negotiate_features(hw, req_features) < 0)
1698                 return -1;
1699
1700         hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
1701
1702         if (!hw->virtio_user_dev)
1703                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1704
1705         /* If host does not support both status and MSI-X then disable LSC */
1706         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1707             hw->use_msix != VIRTIO_MSIX_NONE)
1708                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1709         else
1710                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1711
1712         /* Setting up rx_header size for the device */
1713         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1714             vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
1715             vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
1716                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1717         else
1718                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1719
1720         /* Copy the permanent MAC address to: virtio_hw */
1721         virtio_get_hwaddr(hw);
1722         rte_ether_addr_copy((struct rte_ether_addr *)hw->mac_addr,
1723                         &eth_dev->data->mac_addrs[0]);
1724         PMD_INIT_LOG(DEBUG,
1725                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1726                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1727                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1728
1729         if (hw->speed == SPEED_UNKNOWN) {
1730                 if (vtpci_with_feature(hw, VIRTIO_NET_F_SPEED_DUPLEX)) {
1731                         config = &local_config;
1732                         vtpci_read_dev_config(hw,
1733                                 offsetof(struct virtio_net_config, speed),
1734                                 &config->speed, sizeof(config->speed));
1735                         vtpci_read_dev_config(hw,
1736                                 offsetof(struct virtio_net_config, duplex),
1737                                 &config->duplex, sizeof(config->duplex));
1738                         hw->speed = config->speed;
1739                         hw->duplex = config->duplex;
1740                 }
1741         }
1742         if (hw->speed == SPEED_UNKNOWN)
1743                 hw->speed = ETH_SPEED_NUM_10G;
1744         if (hw->duplex == DUPLEX_UNKNOWN)
1745                 hw->duplex = ETH_LINK_FULL_DUPLEX;
1746         PMD_INIT_LOG(DEBUG, "link speed = %d, duplex = %d",
1747                 hw->speed, hw->duplex);
1748         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1749                 config = &local_config;
1750
1751                 vtpci_read_dev_config(hw,
1752                         offsetof(struct virtio_net_config, mac),
1753                         &config->mac, sizeof(config->mac));
1754
1755                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1756                         vtpci_read_dev_config(hw,
1757                                 offsetof(struct virtio_net_config, status),
1758                                 &config->status, sizeof(config->status));
1759                 } else {
1760                         PMD_INIT_LOG(DEBUG,
1761                                      "VIRTIO_NET_F_STATUS is not supported");
1762                         config->status = 0;
1763                 }
1764
1765                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1766                         vtpci_read_dev_config(hw,
1767                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1768                                 &config->max_virtqueue_pairs,
1769                                 sizeof(config->max_virtqueue_pairs));
1770                 } else {
1771                         PMD_INIT_LOG(DEBUG,
1772                                      "VIRTIO_NET_F_MQ is not supported");
1773                         config->max_virtqueue_pairs = 1;
1774                 }
1775
1776                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1777
1778                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1779                         vtpci_read_dev_config(hw,
1780                                 offsetof(struct virtio_net_config, mtu),
1781                                 &config->mtu,
1782                                 sizeof(config->mtu));
1783
1784                         /*
1785                          * MTU value has already been checked at negotiation
1786                          * time, but check again in case it has changed since
1787                          * then, which should not happen.
1788                          */
1789                         if (config->mtu < RTE_ETHER_MIN_MTU) {
1790                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1791                                                 config->mtu);
1792                                 return -1;
1793                         }
1794
1795                         hw->max_mtu = config->mtu;
1796                         /* Set initial MTU to maximum one supported by vhost */
1797                         eth_dev->data->mtu = config->mtu;
1798
1799                 } else {
1800                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1801                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1802                 }
1803
1804                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1805                                 config->max_virtqueue_pairs);
1806                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1807                 PMD_INIT_LOG(DEBUG,
1808                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1809                                 config->mac[0], config->mac[1],
1810                                 config->mac[2], config->mac[3],
1811                                 config->mac[4], config->mac[5]);
1812         } else {
1813                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1814                 hw->max_queue_pairs = 1;
1815                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - RTE_ETHER_HDR_LEN -
1816                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1817         }
1818
1819         ret = virtio_alloc_queues(eth_dev);
1820         if (ret < 0)
1821                 return ret;
1822
1823         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1824                 if (virtio_configure_intr(eth_dev) < 0) {
1825                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1826                         virtio_free_queues(hw);
1827                         return -1;
1828                 }
1829         }
1830
1831         vtpci_reinit_complete(hw);
1832
1833         if (pci_dev)
1834                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1835                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1836                         pci_dev->id.device_id);
1837
1838         return 0;
1839 }
1840
1841 /*
1842  * Remap the PCI device again (IO port map for legacy device and
1843  * memory map for modern device), so that the secondary process
1844  * could have the PCI initiated correctly.
1845  */
1846 static int
1847 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1848 {
1849         if (hw->modern) {
1850                 /*
1851                  * We don't have to re-parse the PCI config space, since
1852                  * rte_pci_map_device() makes sure the mapped address
1853                  * in secondary process would equal to the one mapped in
1854                  * the primary process: error will be returned if that
1855                  * requirement is not met.
1856                  *
1857                  * That said, we could simply reuse all cap pointers
1858                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1859                  * primary process, which is stored in shared memory.
1860                  */
1861                 if (rte_pci_map_device(pci_dev)) {
1862                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1863                         return -1;
1864                 }
1865         } else {
1866                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1867                         return -1;
1868         }
1869
1870         return 0;
1871 }
1872
1873 static void
1874 virtio_set_vtpci_ops(struct virtio_hw *hw)
1875 {
1876 #ifdef RTE_VIRTIO_USER
1877         if (hw->virtio_user_dev)
1878                 VTPCI_OPS(hw) = &virtio_user_ops;
1879         else
1880 #endif
1881         if (hw->modern)
1882                 VTPCI_OPS(hw) = &modern_ops;
1883         else
1884                 VTPCI_OPS(hw) = &legacy_ops;
1885 }
1886
1887 /*
1888  * This function is based on probe() function in virtio_pci.c
1889  * It returns 0 on success.
1890  */
1891 int
1892 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1893 {
1894         struct virtio_hw *hw = eth_dev->data->dev_private;
1895         uint32_t speed = SPEED_UNKNOWN;
1896         int vectorized = 0;
1897         int ret;
1898
1899         if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) {
1900                 PMD_INIT_LOG(ERR,
1901                         "Not sufficient headroom required = %d, avail = %d",
1902                         (int)sizeof(struct virtio_net_hdr_mrg_rxbuf),
1903                         RTE_PKTMBUF_HEADROOM);
1904
1905                 return -1;
1906         }
1907
1908         eth_dev->dev_ops = &virtio_eth_dev_ops;
1909
1910         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1911                 if (!hw->virtio_user_dev) {
1912                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1913                         if (ret)
1914                                 return ret;
1915                 }
1916
1917                 virtio_set_vtpci_ops(hw);
1918                 set_rxtx_funcs(eth_dev);
1919
1920                 return 0;
1921         }
1922         ret = virtio_dev_devargs_parse(eth_dev->device->devargs,
1923                  NULL, &speed, &vectorized);
1924         if (ret < 0)
1925                 return ret;
1926         hw->speed = speed;
1927         /*
1928          * Pass the information to the rte_eth_dev_close() that it should also
1929          * release the private port resources.
1930          */
1931         eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1932
1933         /* Allocate memory for storing MAC addresses */
1934         eth_dev->data->mac_addrs = rte_zmalloc("virtio",
1935                                 VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN, 0);
1936         if (eth_dev->data->mac_addrs == NULL) {
1937                 PMD_INIT_LOG(ERR,
1938                         "Failed to allocate %d bytes needed to store MAC addresses",
1939                         VIRTIO_MAX_MAC_ADDRS * RTE_ETHER_ADDR_LEN);
1940                 return -ENOMEM;
1941         }
1942
1943         hw->port_id = eth_dev->data->port_id;
1944         /* For virtio_user case the hw->virtio_user_dev is populated by
1945          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1946          */
1947         if (!hw->virtio_user_dev) {
1948                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1949                 if (ret)
1950                         goto err_vtpci_init;
1951         }
1952
1953         rte_spinlock_init(&hw->state_lock);
1954
1955         /* reset device and negotiate default features */
1956         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1957         if (ret < 0)
1958                 goto err_virtio_init;
1959
1960         if (vectorized) {
1961                 if (!vtpci_packed_queue(hw)) {
1962                         hw->use_vec_rx = 1;
1963                 } else {
1964 #if !defined(CC_AVX512_SUPPORT)
1965                         PMD_DRV_LOG(INFO,
1966                                 "building environment do not support packed ring vectorized");
1967 #else
1968                         if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F)) {
1969                                 hw->use_vec_rx = 1;
1970                                 hw->use_vec_tx = 1;
1971                         }
1972 #endif
1973                 }
1974         }
1975
1976         hw->opened = true;
1977
1978         return 0;
1979
1980 err_virtio_init:
1981         if (!hw->virtio_user_dev) {
1982                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1983                 if (!hw->modern)
1984                         rte_pci_ioport_unmap(VTPCI_IO(hw));
1985         }
1986 err_vtpci_init:
1987         rte_free(eth_dev->data->mac_addrs);
1988         eth_dev->data->mac_addrs = NULL;
1989         return ret;
1990 }
1991
1992 static int
1993 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1994 {
1995         PMD_INIT_FUNC_TRACE();
1996
1997         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1998                 return 0;
1999
2000         virtio_dev_stop(eth_dev);
2001         virtio_dev_close(eth_dev);
2002
2003         eth_dev->dev_ops = NULL;
2004         eth_dev->tx_pkt_burst = NULL;
2005         eth_dev->rx_pkt_burst = NULL;
2006
2007         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
2008
2009         return 0;
2010 }
2011
2012
2013 static int vdpa_check_handler(__rte_unused const char *key,
2014                 const char *value, void *ret_val)
2015 {
2016         if (strcmp(value, "1") == 0)
2017                 *(int *)ret_val = 1;
2018         else
2019                 *(int *)ret_val = 0;
2020
2021         return 0;
2022 }
2023
2024
2025 static uint32_t
2026 virtio_dev_speed_capa_get(uint32_t speed)
2027 {
2028         switch (speed) {
2029         case ETH_SPEED_NUM_10G:
2030                 return ETH_LINK_SPEED_10G;
2031         case ETH_SPEED_NUM_20G:
2032                 return ETH_LINK_SPEED_20G;
2033         case ETH_SPEED_NUM_25G:
2034                 return ETH_LINK_SPEED_25G;
2035         case ETH_SPEED_NUM_40G:
2036                 return ETH_LINK_SPEED_40G;
2037         case ETH_SPEED_NUM_50G:
2038                 return ETH_LINK_SPEED_50G;
2039         case ETH_SPEED_NUM_56G:
2040                 return ETH_LINK_SPEED_56G;
2041         case ETH_SPEED_NUM_100G:
2042                 return ETH_LINK_SPEED_100G;
2043         default:
2044                 return 0;
2045         }
2046 }
2047
2048 static int vectorized_check_handler(__rte_unused const char *key,
2049                 const char *value, void *ret_val)
2050 {
2051         if (strcmp(value, "1") == 0)
2052                 *(int *)ret_val = 1;
2053         else
2054                 *(int *)ret_val = 0;
2055
2056         return 0;
2057 }
2058
2059 #define VIRTIO_ARG_SPEED      "speed"
2060 #define VIRTIO_ARG_VDPA       "vdpa"
2061 #define VIRTIO_ARG_VECTORIZED "vectorized"
2062
2063
2064 static int
2065 link_speed_handler(const char *key __rte_unused,
2066                 const char *value, void *ret_val)
2067 {
2068         uint32_t val;
2069         if (!value || !ret_val)
2070                 return -EINVAL;
2071         val = strtoul(value, NULL, 0);
2072         /* validate input */
2073         if (virtio_dev_speed_capa_get(val) == 0)
2074                 return -EINVAL;
2075         *(uint32_t *)ret_val = val;
2076
2077         return 0;
2078 }
2079
2080
2081 static int
2082 virtio_dev_devargs_parse(struct rte_devargs *devargs, int *vdpa,
2083         uint32_t *speed, int *vectorized)
2084 {
2085         struct rte_kvargs *kvlist;
2086         int ret = 0;
2087
2088         if (devargs == NULL)
2089                 return 0;
2090
2091         kvlist = rte_kvargs_parse(devargs->args, NULL);
2092         if (kvlist == NULL) {
2093                 PMD_INIT_LOG(ERR, "error when parsing param");
2094                 return 0;
2095         }
2096         if (vdpa && rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) {
2097                 /* vdpa mode selected when there's a key-value pair:
2098                  * vdpa=1
2099                  */
2100                 ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA,
2101                                 vdpa_check_handler, vdpa);
2102                 if (ret < 0) {
2103                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2104                                 VIRTIO_ARG_VDPA);
2105                         goto exit;
2106                 }
2107         }
2108         if (speed && rte_kvargs_count(kvlist, VIRTIO_ARG_SPEED) == 1) {
2109                 ret = rte_kvargs_process(kvlist,
2110                                         VIRTIO_ARG_SPEED,
2111                                         link_speed_handler, speed);
2112                 if (ret < 0) {
2113                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2114                                         VIRTIO_ARG_SPEED);
2115                         goto exit;
2116                 }
2117         }
2118
2119         if (vectorized &&
2120                 rte_kvargs_count(kvlist, VIRTIO_ARG_VECTORIZED) == 1) {
2121                 ret = rte_kvargs_process(kvlist,
2122                                 VIRTIO_ARG_VECTORIZED,
2123                                 vectorized_check_handler, vectorized);
2124                 if (ret < 0) {
2125                         PMD_INIT_LOG(ERR, "Failed to parse %s",
2126                                         VIRTIO_ARG_VECTORIZED);
2127                         goto exit;
2128                 }
2129         }
2130
2131 exit:
2132         rte_kvargs_free(kvlist);
2133         return ret;
2134 }
2135
2136 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
2137         struct rte_pci_device *pci_dev)
2138 {
2139         int vdpa = 0;
2140         int ret = 0;
2141
2142         ret = virtio_dev_devargs_parse(pci_dev->device.devargs, &vdpa, NULL,
2143                 NULL);
2144         if (ret < 0) {
2145                 PMD_INIT_LOG(ERR, "devargs parsing is failed");
2146                 return ret;
2147         }
2148         /* virtio pmd skips probe if device needs to work in vdpa mode */
2149         if (vdpa == 1)
2150                 return 1;
2151
2152         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
2153                 eth_virtio_dev_init);
2154 }
2155
2156 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
2157 {
2158         int ret;
2159
2160         ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
2161         /* Port has already been released by close. */
2162         if (ret == -ENODEV)
2163                 ret = 0;
2164         return ret;
2165 }
2166
2167 static struct rte_pci_driver rte_virtio_pmd = {
2168         .driver = {
2169                 .name = "net_virtio",
2170         },
2171         .id_table = pci_id_virtio_map,
2172         .drv_flags = 0,
2173         .probe = eth_virtio_pci_probe,
2174         .remove = eth_virtio_pci_remove,
2175 };
2176
2177 RTE_INIT(rte_virtio_pmd_init)
2178 {
2179         rte_eal_iopl_init();
2180         rte_pci_register(&rte_virtio_pmd);
2181 }
2182
2183 static bool
2184 rx_offload_enabled(struct virtio_hw *hw)
2185 {
2186         return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
2187                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2188                 vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
2189 }
2190
2191 static bool
2192 tx_offload_enabled(struct virtio_hw *hw)
2193 {
2194         return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
2195                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
2196                 vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
2197 }
2198
2199 /*
2200  * Configure virtio device
2201  * It returns 0 on success.
2202  */
2203 static int
2204 virtio_dev_configure(struct rte_eth_dev *dev)
2205 {
2206         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2207         const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
2208         struct virtio_hw *hw = dev->data->dev_private;
2209         uint32_t ether_hdr_len = RTE_ETHER_HDR_LEN + VLAN_TAG_LEN +
2210                 hw->vtnet_hdr_size;
2211         uint64_t rx_offloads = rxmode->offloads;
2212         uint64_t tx_offloads = txmode->offloads;
2213         uint64_t req_features;
2214         int ret;
2215
2216         PMD_INIT_LOG(DEBUG, "configure");
2217         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
2218
2219         if (rxmode->mq_mode != ETH_MQ_RX_NONE) {
2220                 PMD_DRV_LOG(ERR,
2221                         "Unsupported Rx multi queue mode %d",
2222                         rxmode->mq_mode);
2223                 return -EINVAL;
2224         }
2225
2226         if (txmode->mq_mode != ETH_MQ_TX_NONE) {
2227                 PMD_DRV_LOG(ERR,
2228                         "Unsupported Tx multi queue mode %d",
2229                         txmode->mq_mode);
2230                 return -EINVAL;
2231         }
2232
2233         if (dev->data->dev_conf.intr_conf.rxq) {
2234                 ret = virtio_init_device(dev, hw->req_guest_features);
2235                 if (ret < 0)
2236                         return ret;
2237         }
2238
2239         if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
2240                 req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
2241
2242         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2243                            DEV_RX_OFFLOAD_TCP_CKSUM))
2244                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
2245
2246         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
2247                 req_features |=
2248                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2249                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2250
2251         if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
2252                            DEV_TX_OFFLOAD_TCP_CKSUM))
2253                 req_features |= (1ULL << VIRTIO_NET_F_CSUM);
2254
2255         if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
2256                 req_features |=
2257                         (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2258                         (1ULL << VIRTIO_NET_F_HOST_TSO6);
2259
2260         /* if request features changed, reinit the device */
2261         if (req_features != hw->req_guest_features) {
2262                 ret = virtio_init_device(dev, req_features);
2263                 if (ret < 0)
2264                         return ret;
2265         }
2266
2267         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2268                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
2269                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
2270                 PMD_DRV_LOG(ERR,
2271                         "rx checksum not available on this host");
2272                 return -ENOTSUP;
2273         }
2274
2275         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
2276                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
2277                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
2278                 PMD_DRV_LOG(ERR,
2279                         "Large Receive Offload not available on this host");
2280                 return -ENOTSUP;
2281         }
2282
2283         /* start control queue */
2284         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
2285                 virtio_dev_cq_start(dev);
2286
2287         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
2288                 hw->vlan_strip = 1;
2289
2290         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
2291             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2292                 PMD_DRV_LOG(ERR,
2293                             "vlan filtering not available on this host");
2294                 return -ENOTSUP;
2295         }
2296
2297         hw->has_tx_offload = tx_offload_enabled(hw);
2298         hw->has_rx_offload = rx_offload_enabled(hw);
2299
2300         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2301                 /* Enable vector (0) for Link State Intrerrupt */
2302                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
2303                                 VIRTIO_MSI_NO_VECTOR) {
2304                         PMD_DRV_LOG(ERR, "failed to set config vector");
2305                         return -EBUSY;
2306                 }
2307
2308         if (vtpci_packed_queue(hw)) {
2309 #if defined(RTE_ARCH_X86_64) && defined(CC_AVX512_SUPPORT)
2310                 if ((hw->use_vec_rx || hw->use_vec_tx) &&
2311                     (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) ||
2312                      !vtpci_with_feature(hw, VIRTIO_F_IN_ORDER) ||
2313                      !vtpci_with_feature(hw, VIRTIO_F_VERSION_1))) {
2314                         PMD_DRV_LOG(INFO,
2315                                 "disabled packed ring vectorized path for requirements not met");
2316                         hw->use_vec_rx = 0;
2317                         hw->use_vec_tx = 0;
2318                 }
2319 #else
2320                 hw->use_vec_rx = 0;
2321                 hw->use_vec_tx = 0;
2322 #endif
2323
2324                 if (hw->use_vec_rx) {
2325                         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2326                                 PMD_DRV_LOG(INFO,
2327                                         "disabled packed ring vectorized rx for mrg_rxbuf enabled");
2328                                 hw->use_vec_rx = 0;
2329                         }
2330
2331                         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) {
2332                                 PMD_DRV_LOG(INFO,
2333                                         "disabled packed ring vectorized rx for TCP_LRO enabled");
2334                                 hw->use_vec_rx = 0;
2335                         }
2336                 }
2337         } else {
2338                 if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
2339                         hw->use_inorder_tx = 1;
2340                         hw->use_inorder_rx = 1;
2341                         hw->use_vec_rx = 0;
2342                 }
2343
2344                 if (hw->use_vec_rx) {
2345 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
2346                         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
2347                                 PMD_DRV_LOG(INFO,
2348                                         "disabled split ring vectorized path for requirement not met");
2349                                 hw->use_vec_rx = 0;
2350                         }
2351 #endif
2352                         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
2353                                 PMD_DRV_LOG(INFO,
2354                                         "disabled split ring vectorized rx for mrg_rxbuf enabled");
2355                                 hw->use_vec_rx = 0;
2356                         }
2357
2358                         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
2359                                            DEV_RX_OFFLOAD_TCP_CKSUM |
2360                                            DEV_RX_OFFLOAD_TCP_LRO |
2361                                            DEV_RX_OFFLOAD_VLAN_STRIP)) {
2362                                 PMD_DRV_LOG(INFO,
2363                                         "disabled split ring vectorized rx for offloading enabled");
2364                                 hw->use_vec_rx = 0;
2365                         }
2366                 }
2367         }
2368
2369         return 0;
2370 }
2371
2372
2373 static int
2374 virtio_dev_start(struct rte_eth_dev *dev)
2375 {
2376         uint16_t nb_queues, i;
2377         struct virtnet_rx *rxvq;
2378         struct virtnet_tx *txvq __rte_unused;
2379         struct virtio_hw *hw = dev->data->dev_private;
2380         int ret;
2381
2382         /* Finish the initialization of the queues */
2383         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2384                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
2385                 if (ret < 0)
2386                         return ret;
2387         }
2388         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2389                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
2390                 if (ret < 0)
2391                         return ret;
2392         }
2393
2394         /* check if lsc interrupt feature is enabled */
2395         if (dev->data->dev_conf.intr_conf.lsc) {
2396                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
2397                         PMD_DRV_LOG(ERR, "link status not supported by host");
2398                         return -ENOTSUP;
2399                 }
2400         }
2401
2402         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
2403          * in device configure, but it could be unmapped  when device is
2404          * stopped.
2405          */
2406         if (dev->data->dev_conf.intr_conf.lsc ||
2407             dev->data->dev_conf.intr_conf.rxq) {
2408                 virtio_intr_disable(dev);
2409
2410                 /* Setup interrupt callback  */
2411                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
2412                         rte_intr_callback_register(dev->intr_handle,
2413                                                    virtio_interrupt_handler,
2414                                                    dev);
2415
2416                 if (virtio_intr_enable(dev) < 0) {
2417                         PMD_DRV_LOG(ERR, "interrupt enable failed");
2418                         return -EIO;
2419                 }
2420         }
2421
2422         /*Notify the backend
2423          *Otherwise the tap backend might already stop its queue due to fullness.
2424          *vhost backend will have no chance to be waked up
2425          */
2426         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
2427         if (hw->max_queue_pairs > 1) {
2428                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
2429                         return -EINVAL;
2430         }
2431
2432         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
2433
2434         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2435                 rxvq = dev->data->rx_queues[i];
2436                 /* Flush the old packets */
2437                 virtqueue_rxvq_flush(rxvq->vq);
2438                 virtqueue_notify(rxvq->vq);
2439         }
2440
2441         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2442                 txvq = dev->data->tx_queues[i];
2443                 virtqueue_notify(txvq->vq);
2444         }
2445
2446         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
2447
2448         for (i = 0; i < dev->data->nb_rx_queues; i++) {
2449                 rxvq = dev->data->rx_queues[i];
2450                 VIRTQUEUE_DUMP(rxvq->vq);
2451         }
2452
2453         for (i = 0; i < dev->data->nb_tx_queues; i++) {
2454                 txvq = dev->data->tx_queues[i];
2455                 VIRTQUEUE_DUMP(txvq->vq);
2456         }
2457
2458         set_rxtx_funcs(dev);
2459         hw->started = true;
2460
2461         /* Initialize Link state */
2462         virtio_dev_link_update(dev, 0);
2463
2464         return 0;
2465 }
2466
2467 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
2468 {
2469         struct virtio_hw *hw = dev->data->dev_private;
2470         uint16_t nr_vq = virtio_get_nr_vq(hw);
2471         const char *type __rte_unused;
2472         unsigned int i, mbuf_num = 0;
2473         struct virtqueue *vq;
2474         struct rte_mbuf *buf;
2475         int queue_type;
2476
2477         if (hw->vqs == NULL)
2478                 return;
2479
2480         for (i = 0; i < nr_vq; i++) {
2481                 vq = hw->vqs[i];
2482                 if (!vq)
2483                         continue;
2484
2485                 queue_type = virtio_get_queue_type(hw, i);
2486                 if (queue_type == VTNET_RQ)
2487                         type = "rxq";
2488                 else if (queue_type == VTNET_TQ)
2489                         type = "txq";
2490                 else
2491                         continue;
2492
2493                 PMD_INIT_LOG(DEBUG,
2494                         "Before freeing %s[%d] used and unused buf",
2495                         type, i);
2496                 VIRTQUEUE_DUMP(vq);
2497
2498                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
2499                         rte_pktmbuf_free(buf);
2500                         mbuf_num++;
2501                 }
2502
2503                 PMD_INIT_LOG(DEBUG,
2504                         "After freeing %s[%d] used and unused buf",
2505                         type, i);
2506                 VIRTQUEUE_DUMP(vq);
2507         }
2508
2509         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
2510 }
2511
2512 /*
2513  * Stop device: disable interrupt and mark link down
2514  */
2515 static void
2516 virtio_dev_stop(struct rte_eth_dev *dev)
2517 {
2518         struct virtio_hw *hw = dev->data->dev_private;
2519         struct rte_eth_link link;
2520         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
2521
2522         PMD_INIT_LOG(DEBUG, "stop");
2523
2524         rte_spinlock_lock(&hw->state_lock);
2525         if (!hw->started)
2526                 goto out_unlock;
2527         hw->started = false;
2528
2529         if (intr_conf->lsc || intr_conf->rxq) {
2530                 virtio_intr_disable(dev);
2531
2532                 /* Reset interrupt callback  */
2533                 if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
2534                         rte_intr_callback_unregister(dev->intr_handle,
2535                                                      virtio_interrupt_handler,
2536                                                      dev);
2537                 }
2538         }
2539
2540         memset(&link, 0, sizeof(link));
2541         rte_eth_linkstatus_set(dev, &link);
2542 out_unlock:
2543         rte_spinlock_unlock(&hw->state_lock);
2544 }
2545
2546 static int
2547 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2548 {
2549         struct rte_eth_link link;
2550         uint16_t status;
2551         struct virtio_hw *hw = dev->data->dev_private;
2552
2553         memset(&link, 0, sizeof(link));
2554         link.link_duplex = hw->duplex;
2555         link.link_speed  = hw->speed;
2556         link.link_autoneg = ETH_LINK_AUTONEG;
2557
2558         if (!hw->started) {
2559                 link.link_status = ETH_LINK_DOWN;
2560         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2561                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2562                 vtpci_read_dev_config(hw,
2563                                 offsetof(struct virtio_net_config, status),
2564                                 &status, sizeof(status));
2565                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2566                         link.link_status = ETH_LINK_DOWN;
2567                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2568                                      dev->data->port_id);
2569                 } else {
2570                         link.link_status = ETH_LINK_UP;
2571                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2572                                      dev->data->port_id);
2573                 }
2574         } else {
2575                 link.link_status = ETH_LINK_UP;
2576         }
2577
2578         return rte_eth_linkstatus_set(dev, &link);
2579 }
2580
2581 static int
2582 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2583 {
2584         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2585         struct virtio_hw *hw = dev->data->dev_private;
2586         uint64_t offloads = rxmode->offloads;
2587
2588         if (mask & ETH_VLAN_FILTER_MASK) {
2589                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2590                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2591
2592                         PMD_DRV_LOG(NOTICE,
2593                                 "vlan filtering not available on this host");
2594
2595                         return -ENOTSUP;
2596                 }
2597         }
2598
2599         if (mask & ETH_VLAN_STRIP_MASK)
2600                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2601
2602         return 0;
2603 }
2604
2605 static int
2606 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2607 {
2608         uint64_t tso_mask, host_features;
2609         struct virtio_hw *hw = dev->data->dev_private;
2610         dev_info->speed_capa = virtio_dev_speed_capa_get(hw->speed);
2611
2612         dev_info->max_rx_queues =
2613                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2614         dev_info->max_tx_queues =
2615                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2616         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2617         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2618         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2619
2620         host_features = VTPCI_OPS(hw)->get_features(hw);
2621         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2622         dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
2623         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2624                 dev_info->rx_offload_capa |=
2625                         DEV_RX_OFFLOAD_TCP_CKSUM |
2626                         DEV_RX_OFFLOAD_UDP_CKSUM;
2627         }
2628         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2629                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2630         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2631                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2632         if ((host_features & tso_mask) == tso_mask)
2633                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2634
2635         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2636                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2637         if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2638                 dev_info->tx_offload_capa |=
2639                         DEV_TX_OFFLOAD_UDP_CKSUM |
2640                         DEV_TX_OFFLOAD_TCP_CKSUM;
2641         }
2642         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2643                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2644         if ((host_features & tso_mask) == tso_mask)
2645                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2646
2647         return 0;
2648 }
2649
2650 /*
2651  * It enables testpmd to collect per queue stats.
2652  */
2653 static int
2654 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2655 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2656 __rte_unused uint8_t is_rx)
2657 {
2658         return 0;
2659 }
2660
2661 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2662 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2663 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2664
2665 RTE_INIT(virtio_init_log)
2666 {
2667         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2668         if (virtio_logtype_init >= 0)
2669                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2670         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2671         if (virtio_logtype_driver >= 0)
2672                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2673 }