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
  32 #include "virtio_ethdev.h"
  33 #include "virtio_pci.h"
  34 #include "virtio_logs.h"
  35 #include "virtqueue.h"
  36 #include "virtio_rxtx.h"
  37
  38 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  39 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  40 static int  virtio_dev_start(struct rte_eth_dev *dev);
  41 static void virtio_dev_stop(struct rte_eth_dev *dev);
  42 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  43 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  44 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  45 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  46 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  47                                 struct rte_eth_dev_info *dev_info);
  48 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  49         int wait_to_complete);
  50 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  51
  52 static void virtio_set_hwaddr(struct virtio_hw *hw);
  53 static void virtio_get_hwaddr(struct virtio_hw *hw);
  54
  55 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  56                                  struct rte_eth_stats *stats);
  57 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  58                                  struct rte_eth_xstat *xstats, unsigned n);
  59 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  60                                        struct rte_eth_xstat_name *xstats_names,
  61                                        unsigned limit);
  62 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  63 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  64 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  65                                 uint16_t vlan_id, int on);
  66 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  67                                 struct ether_addr *mac_addr,
  68                                 uint32_t index, uint32_t vmdq);
  69 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  70 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  71                                 struct ether_addr *mac_addr);
  72
  73 static int virtio_intr_enable(struct rte_eth_dev *dev);
  74 static int virtio_intr_disable(struct rte_eth_dev *dev);
  75
  76 static int virtio_dev_queue_stats_mapping_set(
  77         struct rte_eth_dev *eth_dev,
  78         uint16_t queue_id,
  79         uint8_t stat_idx,
  80         uint8_t is_rx);
  81
  82 int virtio_logtype_init;
  83 int virtio_logtype_driver;
  84
  85 static void virtio_notify_peers(struct rte_eth_dev *dev);
  86 static void virtio_ack_link_announce(struct rte_eth_dev *dev);
  87
  88 /*
  89  * The set of PCI devices this driver supports
  90  */
  91 static const struct rte_pci_id pci_id_virtio_map[] = {
  92         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  93         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  94         { .vendor_id = 0, /* sentinel */ },
  95 };
  96
  97 struct rte_virtio_xstats_name_off {
  98         char name[RTE_ETH_XSTATS_NAME_SIZE];
  99         unsigned offset;
 100 };
 101
 102 /* [rt]x_qX_ is prepended to the name string here */
 103 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 104         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 105         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 106         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 107         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 108         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 109         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 110         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 111         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 112         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 113         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 114         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 115         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 116         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 117 };
 118
 119 /* [rt]x_qX_ is prepended to the name string here */
 120 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 121         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 122         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 123         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 124         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 125         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 126         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 127         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 128         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 129         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 130         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 131         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 132         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 133         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 134 };
 135
 136 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 137                             sizeof(rte_virtio_rxq_stat_strings[0]))
 138 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 139                             sizeof(rte_virtio_txq_stat_strings[0]))
 140
 141 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 142
 143 static int
 144 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 145                 int *dlen, int pkt_num)
 146 {
 147         uint32_t head, i;
 148         int k, sum = 0;
 149         virtio_net_ctrl_ack status = ~0;
 150         struct virtio_pmd_ctrl *result;
 151         struct virtqueue *vq;
 152
 153         ctrl->status = status;
 154
 155         if (!cvq || !cvq->vq) {
 156                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 157                 return -1;
 158         }
 159
 160         rte_spinlock_lock(&cvq->lock);
 161         vq = cvq->vq;
 162         head = vq->vq_desc_head_idx;
 163
 164         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 165                 "vq->hw->cvq = %p vq = %p",
 166                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 167
 168         if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
 169                 rte_spinlock_unlock(&cvq->lock);
 170                 return -1;
 171         }
 172
 173         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 174                 sizeof(struct virtio_pmd_ctrl));
 175
 176         /*
 177          * Format is enforced in qemu code:
 178          * One TX packet for header;
 179          * At least one TX packet per argument;
 180          * One RX packet for ACK.
 181          */
 182         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 183         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 184         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 185         vq->vq_free_cnt--;
 186         i = vq->vq_ring.desc[head].next;
 187
 188         for (k = 0; k < pkt_num; k++) {
 189                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 190                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 191                         + sizeof(struct virtio_net_ctrl_hdr)
 192                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 193                 vq->vq_ring.desc[i].len = dlen[k];
 194                 sum += dlen[k];
 195                 vq->vq_free_cnt--;
 196                 i = vq->vq_ring.desc[i].next;
 197         }
 198
 199         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 200         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 201                         + sizeof(struct virtio_net_ctrl_hdr);
 202         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 203         vq->vq_free_cnt--;
 204
 205         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 206
 207         vq_update_avail_ring(vq, head);
 208         vq_update_avail_idx(vq);
 209
 210         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 211
 212         virtqueue_notify(vq);
 213
 214         rte_rmb();
 215         while (VIRTQUEUE_NUSED(vq) == 0) {
 216                 rte_rmb();
 217                 usleep(100);
 218         }
 219
 220         while (VIRTQUEUE_NUSED(vq)) {
 221                 uint32_t idx, desc_idx, used_idx;
 222                 struct vring_used_elem *uep;
 223
 224                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 225                                 & (vq->vq_nentries - 1));
 226                 uep = &vq->vq_ring.used->ring[used_idx];
 227                 idx = (uint32_t) uep->id;
 228                 desc_idx = idx;
 229
 230                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 231                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 232                         vq->vq_free_cnt++;
 233                 }
 234
 235                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 236                 vq->vq_desc_head_idx = idx;
 237
 238                 vq->vq_used_cons_idx++;
 239                 vq->vq_free_cnt++;
 240         }
 241
 242         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 243                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 244
 245         result = cvq->virtio_net_hdr_mz->addr;
 246
 247         rte_spinlock_unlock(&cvq->lock);
 248         return result->status;
 249 }
 250
 251 static int
 252 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 253 {
 254         struct virtio_hw *hw = dev->data->dev_private;
 255         struct virtio_pmd_ctrl ctrl;
 256         int dlen[1];
 257         int ret;
 258
 259         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 260         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 261         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 262
 263         dlen[0] = sizeof(uint16_t);
 264
 265         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 266         if (ret) {
 267                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 268                           "failed, this is too late now...");
 269                 return -EINVAL;
 270         }
 271
 272         return 0;
 273 }
 274
 275 static void
 276 virtio_dev_queue_release(void *queue __rte_unused)
 277 {
 278         /* do nothing */
 279 }
 280
 281 static uint16_t
 282 virtio_get_nr_vq(struct virtio_hw *hw)
 283 {
 284         uint16_t nr_vq = hw->max_queue_pairs * 2;
 285
 286         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 287                 nr_vq += 1;
 288
 289         return nr_vq;
 290 }
 291
 292 static void
 293 virtio_init_vring(struct virtqueue *vq)
 294 {
 295         int size = vq->vq_nentries;
 296         struct vring *vr = &vq->vq_ring;
 297         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 298
 299         PMD_INIT_FUNC_TRACE();
 300
 301         /*
 302          * Reinitialise since virtio port might have been stopped and restarted
 303          */
 304         memset(ring_mem, 0, vq->vq_ring_size);
 305         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 306         vq->vq_used_cons_idx = 0;
 307         vq->vq_desc_head_idx = 0;
 308         vq->vq_avail_idx = 0;
 309         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 310         vq->vq_free_cnt = vq->vq_nentries;
 311         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 312
 313         vring_desc_init(vr->desc, size);
 314
 315         /*
 316          * Disable device(host) interrupting guest
 317          */
 318         virtqueue_disable_intr(vq);
 319 }
 320
 321 static int
 322 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 323 {
 324         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 325         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 326         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 327         unsigned int vq_size, size;
 328         struct virtio_hw *hw = dev->data->dev_private;
 329         struct virtnet_rx *rxvq = NULL;
 330         struct virtnet_tx *txvq = NULL;
 331         struct virtnet_ctl *cvq = NULL;
 332         struct virtqueue *vq;
 333         size_t sz_hdr_mz = 0;
 334         void *sw_ring = NULL;
 335         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 336         int ret;
 337
 338         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 339
 340         /*
 341          * Read the virtqueue size from the Queue Size field
 342          * Always power of 2 and if 0 virtqueue does not exist
 343          */
 344         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 345         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 346         if (vq_size == 0) {
 347                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 348                 return -EINVAL;
 349         }
 350
 351         if (!rte_is_power_of_2(vq_size)) {
 352                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 353                 return -EINVAL;
 354         }
 355
 356         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 357                  dev->data->port_id, vtpci_queue_idx);
 358
 359         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 360                                 vq_size * sizeof(struct vq_desc_extra),
 361                                 RTE_CACHE_LINE_SIZE);
 362         if (queue_type == VTNET_TQ) {
 363                 /*
 364                  * For each xmit packet, allocate a virtio_net_hdr
 365                  * and indirect ring elements
 366                  */
 367                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 368         } else if (queue_type == VTNET_CQ) {
 369                 /* Allocate a page for control vq command, data and status */
 370                 sz_hdr_mz = PAGE_SIZE;
 371         }
 372
 373         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 374                                 SOCKET_ID_ANY);
 375         if (vq == NULL) {
 376                 PMD_INIT_LOG(ERR, "can not allocate vq");
 377                 return -ENOMEM;
 378         }
 379         hw->vqs[vtpci_queue_idx] = vq;
 380
 381         vq->hw = hw;
 382         vq->vq_queue_index = vtpci_queue_idx;
 383         vq->vq_nentries = vq_size;
 384
 385         /*
 386          * Reserve a memzone for vring elements
 387          */
 388         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 389         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 390         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 391                      size, vq->vq_ring_size);
 392
 393         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 394                         SOCKET_ID_ANY, RTE_MEMZONE_IOVA_CONTIG,
 395                         VIRTIO_PCI_VRING_ALIGN);
 396         if (mz == NULL) {
 397                 if (rte_errno == EEXIST)
 398                         mz = rte_memzone_lookup(vq_name);
 399                 if (mz == NULL) {
 400                         ret = -ENOMEM;
 401                         goto fail_q_alloc;
 402                 }
 403         }
 404
 405         memset(mz->addr, 0, mz->len);
 406
 407         vq->vq_ring_mem = mz->iova;
 408         vq->vq_ring_virt_mem = mz->addr;
 409         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 410                      (uint64_t)mz->iova);
 411         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 412                      (uint64_t)(uintptr_t)mz->addr);
 413
 414         virtio_init_vring(vq);
 415
 416         if (sz_hdr_mz) {
 417                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 418                          dev->data->port_id, vtpci_queue_idx);
 419                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 420                                 SOCKET_ID_ANY, RTE_MEMZONE_IOVA_CONTIG,
 421                                 RTE_CACHE_LINE_SIZE);
 422                 if (hdr_mz == NULL) {
 423                         if (rte_errno == EEXIST)
 424                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 425                         if (hdr_mz == NULL) {
 426                                 ret = -ENOMEM;
 427                                 goto fail_q_alloc;
 428                         }
 429                 }
 430         }
 431
 432         if (queue_type == VTNET_RQ) {
 433                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 434                                sizeof(vq->sw_ring[0]);
 435
 436                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 437                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 438                 if (!sw_ring) {
 439                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 440                         ret = -ENOMEM;
 441                         goto fail_q_alloc;
 442                 }
 443
 444                 vq->sw_ring = sw_ring;
 445                 rxvq = &vq->rxq;
 446                 rxvq->vq = vq;
 447                 rxvq->port_id = dev->data->port_id;
 448                 rxvq->mz = mz;
 449         } else if (queue_type == VTNET_TQ) {
 450                 txvq = &vq->txq;
 451                 txvq->vq = vq;
 452                 txvq->port_id = dev->data->port_id;
 453                 txvq->mz = mz;
 454                 txvq->virtio_net_hdr_mz = hdr_mz;
 455                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 456         } else if (queue_type == VTNET_CQ) {
 457                 cvq = &vq->cq;
 458                 cvq->vq = vq;
 459                 cvq->mz = mz;
 460                 cvq->virtio_net_hdr_mz = hdr_mz;
 461                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 462                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 463
 464                 hw->cvq = cvq;
 465         }
 466
 467         /* For virtio_user case (that is when hw->dev is NULL), we use
 468          * virtual address. And we need properly set _offset_, please see
 469          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 470          */
 471         if (!hw->virtio_user_dev)
 472                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 473         else {
 474                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 475                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 476                 if (queue_type == VTNET_TQ)
 477                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 478                 else if (queue_type == VTNET_CQ)
 479                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 480         }
 481
 482         if (queue_type == VTNET_TQ) {
 483                 struct virtio_tx_region *txr;
 484                 unsigned int i;
 485
 486                 txr = hdr_mz->addr;
 487                 memset(txr, 0, vq_size * sizeof(*txr));
 488                 for (i = 0; i < vq_size; i++) {
 489                         struct vring_desc *start_dp = txr[i].tx_indir;
 490
 491                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 492
 493                         /* first indirect descriptor is always the tx header */
 494                         start_dp->addr = txvq->virtio_net_hdr_mem
 495                                 + i * sizeof(*txr)
 496                                 + offsetof(struct virtio_tx_region, tx_hdr);
 497
 498                         start_dp->len = hw->vtnet_hdr_size;
 499                         start_dp->flags = VRING_DESC_F_NEXT;
 500                 }
 501         }
 502
 503         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 504                 PMD_INIT_LOG(ERR, "setup_queue failed");
 505                 return -EINVAL;
 506         }
 507
 508         return 0;
 509
 510 fail_q_alloc:
 511         rte_free(sw_ring);
 512         rte_memzone_free(hdr_mz);
 513         rte_memzone_free(mz);
 514         rte_free(vq);
 515
 516         return ret;
 517 }
 518
 519 static void
 520 virtio_free_queues(struct virtio_hw *hw)
 521 {
 522         uint16_t nr_vq = virtio_get_nr_vq(hw);
 523         struct virtqueue *vq;
 524         int queue_type;
 525         uint16_t i;
 526
 527         if (hw->vqs == NULL)
 528                 return;
 529
 530         for (i = 0; i < nr_vq; i++) {
 531                 vq = hw->vqs[i];
 532                 if (!vq)
 533                         continue;
 534
 535                 queue_type = virtio_get_queue_type(hw, i);
 536                 if (queue_type == VTNET_RQ) {
 537                         rte_free(vq->sw_ring);
 538                         rte_memzone_free(vq->rxq.mz);
 539                 } else if (queue_type == VTNET_TQ) {
 540                         rte_memzone_free(vq->txq.mz);
 541                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 542                 } else {
 543                         rte_memzone_free(vq->cq.mz);
 544                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 545                 }
 546
 547                 rte_free(vq);
 548                 hw->vqs[i] = NULL;
 549         }
 550
 551         rte_free(hw->vqs);
 552         hw->vqs = NULL;
 553 }
 554
 555 static int
 556 virtio_alloc_queues(struct rte_eth_dev *dev)
 557 {
 558         struct virtio_hw *hw = dev->data->dev_private;
 559         uint16_t nr_vq = virtio_get_nr_vq(hw);
 560         uint16_t i;
 561         int ret;
 562
 563         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 564         if (!hw->vqs) {
 565                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 566                 return -ENOMEM;
 567         }
 568
 569         for (i = 0; i < nr_vq; i++) {
 570                 ret = virtio_init_queue(dev, i);
 571                 if (ret < 0) {
 572                         virtio_free_queues(hw);
 573                         return ret;
 574                 }
 575         }
 576
 577         return 0;
 578 }
 579
 580 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 581
 582 static void
 583 virtio_dev_close(struct rte_eth_dev *dev)
 584 {
 585         struct virtio_hw *hw = dev->data->dev_private;
 586         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 587
 588         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 589
 590         /* reset the NIC */
 591         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 592                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 593         if (intr_conf->rxq)
 594                 virtio_queues_unbind_intr(dev);
 595
 596         if (intr_conf->lsc || intr_conf->rxq) {
 597                 virtio_intr_disable(dev);
 598                 rte_intr_efd_disable(dev->intr_handle);
 599                 rte_free(dev->intr_handle->intr_vec);
 600                 dev->intr_handle->intr_vec = NULL;
 601         }
 602
 603         vtpci_reset(hw);
 604         virtio_dev_free_mbufs(dev);
 605         virtio_free_queues(hw);
 606 }
 607
 608 static void
 609 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 610 {
 611         struct virtio_hw *hw = dev->data->dev_private;
 612         struct virtio_pmd_ctrl ctrl;
 613         int dlen[1];
 614         int ret;
 615
 616         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 617                 PMD_INIT_LOG(INFO, "host does not support rx control");
 618                 return;
 619         }
 620
 621         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 622         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 623         ctrl.data[0] = 1;
 624         dlen[0] = 1;
 625
 626         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 627         if (ret)
 628                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 629 }
 630
 631 static void
 632 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 633 {
 634         struct virtio_hw *hw = dev->data->dev_private;
 635         struct virtio_pmd_ctrl ctrl;
 636         int dlen[1];
 637         int ret;
 638
 639         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 640                 PMD_INIT_LOG(INFO, "host does not support rx control");
 641                 return;
 642         }
 643
 644         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 645         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 646         ctrl.data[0] = 0;
 647         dlen[0] = 1;
 648
 649         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 650         if (ret)
 651                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 652 }
 653
 654 static void
 655 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 656 {
 657         struct virtio_hw *hw = dev->data->dev_private;
 658         struct virtio_pmd_ctrl ctrl;
 659         int dlen[1];
 660         int ret;
 661
 662         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 663                 PMD_INIT_LOG(INFO, "host does not support rx control");
 664                 return;
 665         }
 666
 667         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 668         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 669         ctrl.data[0] = 1;
 670         dlen[0] = 1;
 671
 672         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 673         if (ret)
 674                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 675 }
 676
 677 static void
 678 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 679 {
 680         struct virtio_hw *hw = dev->data->dev_private;
 681         struct virtio_pmd_ctrl ctrl;
 682         int dlen[1];
 683         int ret;
 684
 685         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 686                 PMD_INIT_LOG(INFO, "host does not support rx control");
 687                 return;
 688         }
 689
 690         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 691         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 692         ctrl.data[0] = 0;
 693         dlen[0] = 1;
 694
 695         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 696         if (ret)
 697                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 698 }
 699
 700 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 701 static int
 702 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 703 {
 704         struct virtio_hw *hw = dev->data->dev_private;
 705         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 706                                  hw->vtnet_hdr_size;
 707         uint32_t frame_size = mtu + ether_hdr_len;
 708         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 709
 710         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 711
 712         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 713                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 714                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 715                 return -EINVAL;
 716         }
 717         return 0;
 718 }
 719
 720 static int
 721 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 722 {
 723         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 724         struct virtqueue *vq = rxvq->vq;
 725
 726         virtqueue_enable_intr(vq);
 727         return 0;
 728 }
 729
 730 static int
 731 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 732 {
 733         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 734         struct virtqueue *vq = rxvq->vq;
 735
 736         virtqueue_disable_intr(vq);
 737         return 0;
 738 }
 739
 740 /*
 741  * dev_ops for virtio, bare necessities for basic operation
 742  */
 743 static const struct eth_dev_ops virtio_eth_dev_ops = {
 744         .dev_configure           = virtio_dev_configure,
 745         .dev_start               = virtio_dev_start,
 746         .dev_stop                = virtio_dev_stop,
 747         .dev_close               = virtio_dev_close,
 748         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 749         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 750         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 751         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 752         .mtu_set                 = virtio_mtu_set,
 753         .dev_infos_get           = virtio_dev_info_get,
 754         .stats_get               = virtio_dev_stats_get,
 755         .xstats_get              = virtio_dev_xstats_get,
 756         .xstats_get_names        = virtio_dev_xstats_get_names,
 757         .stats_reset             = virtio_dev_stats_reset,
 758         .xstats_reset            = virtio_dev_stats_reset,
 759         .link_update             = virtio_dev_link_update,
 760         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 761         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 762         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 763         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 764         .rx_queue_release        = virtio_dev_queue_release,
 765         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 766         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 767         .tx_queue_release        = virtio_dev_queue_release,
 768         /* collect stats per queue */
 769         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 770         .vlan_filter_set         = virtio_vlan_filter_set,
 771         .mac_addr_add            = virtio_mac_addr_add,
 772         .mac_addr_remove         = virtio_mac_addr_remove,
 773         .mac_addr_set            = virtio_mac_addr_set,
 774 };
 775
 776 static void
 777 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 778 {
 779         unsigned i;
 780
 781         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 782                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 783                 if (txvq == NULL)
 784                         continue;
 785
 786                 stats->opackets += txvq->stats.packets;
 787                 stats->obytes += txvq->stats.bytes;
 788                 stats->oerrors += txvq->stats.errors;
 789
 790                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 791                         stats->q_opackets[i] = txvq->stats.packets;
 792                         stats->q_obytes[i] = txvq->stats.bytes;
 793                 }
 794         }
 795
 796         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 797                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 798                 if (rxvq == NULL)
 799                         continue;
 800
 801                 stats->ipackets += rxvq->stats.packets;
 802                 stats->ibytes += rxvq->stats.bytes;
 803                 stats->ierrors += rxvq->stats.errors;
 804
 805                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 806                         stats->q_ipackets[i] = rxvq->stats.packets;
 807                         stats->q_ibytes[i] = rxvq->stats.bytes;
 808                 }
 809         }
 810
 811         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 812 }
 813
 814 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 815                                        struct rte_eth_xstat_name *xstats_names,
 816                                        __rte_unused unsigned limit)
 817 {
 818         unsigned i;
 819         unsigned count = 0;
 820         unsigned t;
 821
 822         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 823                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 824
 825         if (xstats_names != NULL) {
 826                 /* Note: limit checked in rte_eth_xstats_names() */
 827
 828                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 829                         struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 830                         if (rxvq == NULL)
 831                                 continue;
 832                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 833                                 snprintf(xstats_names[count].name,
 834                                         sizeof(xstats_names[count].name),
 835                                         "rx_q%u_%s", i,
 836                                         rte_virtio_rxq_stat_strings[t].name);
 837                                 count++;
 838                         }
 839                 }
 840
 841                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 842                         struct virtnet_tx *txvq = dev->data->tx_queues[i];
 843                         if (txvq == NULL)
 844                                 continue;
 845                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 846                                 snprintf(xstats_names[count].name,
 847                                         sizeof(xstats_names[count].name),
 848                                         "tx_q%u_%s", i,
 849                                         rte_virtio_txq_stat_strings[t].name);
 850                                 count++;
 851                         }
 852                 }
 853                 return count;
 854         }
 855         return nstats;
 856 }
 857
 858 static int
 859 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 860                       unsigned n)
 861 {
 862         unsigned i;
 863         unsigned count = 0;
 864
 865         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 866                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 867
 868         if (n < nstats)
 869                 return nstats;
 870
 871         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 872                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 873
 874                 if (rxvq == NULL)
 875                         continue;
 876
 877                 unsigned t;
 878
 879                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 880                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 881                                 rte_virtio_rxq_stat_strings[t].offset);
 882                         xstats[count].id = count;
 883                         count++;
 884                 }
 885         }
 886
 887         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 888                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 889
 890                 if (txvq == NULL)
 891                         continue;
 892
 893                 unsigned t;
 894
 895                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 896                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 897                                 rte_virtio_txq_stat_strings[t].offset);
 898                         xstats[count].id = count;
 899                         count++;
 900                 }
 901         }
 902
 903         return count;
 904 }
 905
 906 static int
 907 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 908 {
 909         virtio_update_stats(dev, stats);
 910
 911         return 0;
 912 }
 913
 914 static void
 915 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 916 {
 917         unsigned int i;
 918
 919         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 920                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 921                 if (txvq == NULL)
 922                         continue;
 923
 924                 txvq->stats.packets = 0;
 925                 txvq->stats.bytes = 0;
 926                 txvq->stats.errors = 0;
 927                 txvq->stats.multicast = 0;
 928                 txvq->stats.broadcast = 0;
 929                 memset(txvq->stats.size_bins, 0,
 930                        sizeof(txvq->stats.size_bins[0]) * 8);
 931         }
 932
 933         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 934                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 935                 if (rxvq == NULL)
 936                         continue;
 937
 938                 rxvq->stats.packets = 0;
 939                 rxvq->stats.bytes = 0;
 940                 rxvq->stats.errors = 0;
 941                 rxvq->stats.multicast = 0;
 942                 rxvq->stats.broadcast = 0;
 943                 memset(rxvq->stats.size_bins, 0,
 944                        sizeof(rxvq->stats.size_bins[0]) * 8);
 945         }
 946 }
 947
 948 static void
 949 virtio_set_hwaddr(struct virtio_hw *hw)
 950 {
 951         vtpci_write_dev_config(hw,
 952                         offsetof(struct virtio_net_config, mac),
 953                         &hw->mac_addr, ETHER_ADDR_LEN);
 954 }
 955
 956 static void
 957 virtio_get_hwaddr(struct virtio_hw *hw)
 958 {
 959         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 960                 vtpci_read_dev_config(hw,
 961                         offsetof(struct virtio_net_config, mac),
 962                         &hw->mac_addr, ETHER_ADDR_LEN);
 963         } else {
 964                 eth_random_addr(&hw->mac_addr[0]);
 965                 virtio_set_hwaddr(hw);
 966         }
 967 }
 968
 969 static int
 970 virtio_mac_table_set(struct virtio_hw *hw,
 971                      const struct virtio_net_ctrl_mac *uc,
 972                      const struct virtio_net_ctrl_mac *mc)
 973 {
 974         struct virtio_pmd_ctrl ctrl;
 975         int err, len[2];
 976
 977         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 978                 PMD_DRV_LOG(INFO, "host does not support mac table");
 979                 return -1;
 980         }
 981
 982         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 983         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 984
 985         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 986         memcpy(ctrl.data, uc, len[0]);
 987
 988         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 989         memcpy(ctrl.data + len[0], mc, len[1]);
 990
 991         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 992         if (err != 0)
 993                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 994         return err;
 995 }
 996
 997 static int
 998 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 999                     uint32_t index, uint32_t vmdq __rte_unused)
1000 {
1001         struct virtio_hw *hw = dev->data->dev_private;
1002         const struct ether_addr *addrs = dev->data->mac_addrs;
1003         unsigned int i;
1004         struct virtio_net_ctrl_mac *uc, *mc;
1005
1006         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1007                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1008                 return -EINVAL;
1009         }
1010
1011         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1012         uc->entries = 0;
1013         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1014         mc->entries = 0;
1015
1016         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1017                 const struct ether_addr *addr
1018                         = (i == index) ? mac_addr : addrs + i;
1019                 struct virtio_net_ctrl_mac *tbl
1020                         = is_multicast_ether_addr(addr) ? mc : uc;
1021
1022                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1023         }
1024
1025         return virtio_mac_table_set(hw, uc, mc);
1026 }
1027
1028 static void
1029 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1030 {
1031         struct virtio_hw *hw = dev->data->dev_private;
1032         struct ether_addr *addrs = dev->data->mac_addrs;
1033         struct virtio_net_ctrl_mac *uc, *mc;
1034         unsigned int i;
1035
1036         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1037                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1038                 return;
1039         }
1040
1041         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1042         uc->entries = 0;
1043         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1044         mc->entries = 0;
1045
1046         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1047                 struct virtio_net_ctrl_mac *tbl;
1048
1049                 if (i == index || is_zero_ether_addr(addrs + i))
1050                         continue;
1051
1052                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1053                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1054         }
1055
1056         virtio_mac_table_set(hw, uc, mc);
1057 }
1058
1059 static void
1060 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1061 {
1062         struct virtio_hw *hw = dev->data->dev_private;
1063
1064         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1065
1066         /* Use atomic update if available */
1067         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1068                 struct virtio_pmd_ctrl ctrl;
1069                 int len = ETHER_ADDR_LEN;
1070
1071                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1072                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1073
1074                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1075                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1076         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1077                 virtio_set_hwaddr(hw);
1078 }
1079
1080 static int
1081 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1082 {
1083         struct virtio_hw *hw = dev->data->dev_private;
1084         struct virtio_pmd_ctrl ctrl;
1085         int len;
1086
1087         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1088                 return -ENOTSUP;
1089
1090         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1091         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1092         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1093         len = sizeof(vlan_id);
1094
1095         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1096 }
1097
1098 static int
1099 virtio_intr_enable(struct rte_eth_dev *dev)
1100 {
1101         struct virtio_hw *hw = dev->data->dev_private;
1102
1103         if (rte_intr_enable(dev->intr_handle) < 0)
1104                 return -1;
1105
1106         if (!hw->virtio_user_dev)
1107                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1108
1109         return 0;
1110 }
1111
1112 static int
1113 virtio_intr_disable(struct rte_eth_dev *dev)
1114 {
1115         struct virtio_hw *hw = dev->data->dev_private;
1116
1117         if (rte_intr_disable(dev->intr_handle) < 0)
1118                 return -1;
1119
1120         if (!hw->virtio_user_dev)
1121                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1122
1123         return 0;
1124 }
1125
1126 static int
1127 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1128 {
1129         uint64_t host_features;
1130
1131         /* Prepare guest_features: feature that driver wants to support */
1132         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1133                 req_features);
1134
1135         /* Read device(host) feature bits */
1136         host_features = VTPCI_OPS(hw)->get_features(hw);
1137         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1138                 host_features);
1139
1140         /* If supported, ensure MTU value is valid before acknowledging it. */
1141         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1142                 struct virtio_net_config config;
1143
1144                 vtpci_read_dev_config(hw,
1145                         offsetof(struct virtio_net_config, mtu),
1146                         &config.mtu, sizeof(config.mtu));
1147
1148                 if (config.mtu < ETHER_MIN_MTU)
1149                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1150         }
1151
1152         /*
1153          * Negotiate features: Subset of device feature bits are written back
1154          * guest feature bits.
1155          */
1156         hw->guest_features = req_features;
1157         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1158         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1159                 hw->guest_features);
1160
1161         if (hw->modern) {
1162                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1163                         PMD_INIT_LOG(ERR,
1164                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1165                         return -1;
1166                 }
1167                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1168                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1169                         PMD_INIT_LOG(ERR,
1170                                 "failed to set FEATURES_OK status!");
1171                         return -1;
1172                 }
1173         }
1174
1175         hw->req_guest_features = req_features;
1176
1177         return 0;
1178 }
1179
1180 int
1181 virtio_dev_pause(struct rte_eth_dev *dev)
1182 {
1183         struct virtio_hw *hw = dev->data->dev_private;
1184
1185         rte_spinlock_lock(&hw->state_lock);
1186
1187         if (hw->started == 0) {
1188                 /* Device is just stopped. */
1189                 rte_spinlock_unlock(&hw->state_lock);
1190                 return -1;
1191         }
1192         hw->started = 0;
1193         /*
1194          * Prevent the worker threads from touching queues to avoid contention,
1195          * 1 ms should be enough for the ongoing Tx function to finish.
1196          */
1197         rte_delay_ms(1);
1198         return 0;
1199 }
1200
1201 /*
1202  * Recover hw state to let the worker threads continue.
1203  */
1204 void
1205 virtio_dev_resume(struct rte_eth_dev *dev)
1206 {
1207         struct virtio_hw *hw = dev->data->dev_private;
1208
1209         hw->started = 1;
1210         rte_spinlock_unlock(&hw->state_lock);
1211 }
1212
1213 /*
1214  * Should be called only after device is paused.
1215  */
1216 int
1217 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1218                 int nb_pkts)
1219 {
1220         struct virtio_hw *hw = dev->data->dev_private;
1221         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1222         int ret;
1223
1224         hw->inject_pkts = tx_pkts;
1225         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1226         hw->inject_pkts = NULL;
1227
1228         return ret;
1229 }
1230
1231 static void
1232 virtio_notify_peers(struct rte_eth_dev *dev)
1233 {
1234         struct virtio_hw *hw = dev->data->dev_private;
1235         struct virtnet_rx *rxvq;
1236         struct rte_mbuf *rarp_mbuf;
1237
1238         if (!dev->data->rx_queues)
1239                 return;
1240
1241         rxvq = dev->data->rx_queues[0];
1242         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1243                         (struct ether_addr *)hw->mac_addr);
1244         if (rarp_mbuf == NULL) {
1245                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1246                 return;
1247         }
1248
1249         /* If virtio port just stopped, no need to send RARP */
1250         if (virtio_dev_pause(dev) < 0) {
1251                 rte_pktmbuf_free(rarp_mbuf);
1252                 return;
1253         }
1254
1255         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1256         virtio_dev_resume(dev);
1257 }
1258
1259 static void
1260 virtio_ack_link_announce(struct rte_eth_dev *dev)
1261 {
1262         struct virtio_hw *hw = dev->data->dev_private;
1263         struct virtio_pmd_ctrl ctrl;
1264
1265         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1266         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1267
1268         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1269 }
1270
1271 /*
1272  * Process virtio config changed interrupt. Call the callback
1273  * if link state changed, generate gratuitous RARP packet if
1274  * the status indicates an ANNOUNCE.
1275  */
1276 void
1277 virtio_interrupt_handler(void *param)
1278 {
1279         struct rte_eth_dev *dev = param;
1280         struct virtio_hw *hw = dev->data->dev_private;
1281         uint8_t isr;
1282
1283         /* Read interrupt status which clears interrupt */
1284         isr = vtpci_isr(hw);
1285         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1286
1287         if (virtio_intr_enable(dev) < 0)
1288                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1289
1290         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1291                 if (virtio_dev_link_update(dev, 0) == 0)
1292                         _rte_eth_dev_callback_process(dev,
1293                                                       RTE_ETH_EVENT_INTR_LSC,
1294                                                       NULL);
1295         }
1296
1297         if (isr & VIRTIO_NET_S_ANNOUNCE) {
1298                 virtio_notify_peers(dev);
1299                 if (hw->cvq)
1300                         virtio_ack_link_announce(dev);
1301         }
1302 }
1303
1304 /* set rx and tx handlers according to what is supported */
1305 static void
1306 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1307 {
1308         struct virtio_hw *hw = eth_dev->data->dev_private;
1309
1310         if (hw->use_simple_rx) {
1311                 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1312                         eth_dev->data->port_id);
1313                 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1314         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1315                 PMD_INIT_LOG(INFO,
1316                         "virtio: using mergeable buffer Rx path on port %u",
1317                         eth_dev->data->port_id);
1318                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1319         } else {
1320                 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1321                         eth_dev->data->port_id);
1322                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1323         }
1324
1325         if (hw->use_simple_tx) {
1326                 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1327                         eth_dev->data->port_id);
1328                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1329         } else {
1330                 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1331                         eth_dev->data->port_id);
1332                 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1333         }
1334 }
1335
1336 /* Only support 1:1 queue/interrupt mapping so far.
1337  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1338  * interrupt vectors (<N+1).
1339  */
1340 static int
1341 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1342 {
1343         uint32_t i;
1344         struct virtio_hw *hw = dev->data->dev_private;
1345
1346         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1347         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1348                 dev->intr_handle->intr_vec[i] = i + 1;
1349                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1350                                                  VIRTIO_MSI_NO_VECTOR) {
1351                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1352                         return -EBUSY;
1353                 }
1354         }
1355
1356         return 0;
1357 }
1358
1359 static void
1360 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1361 {
1362         uint32_t i;
1363         struct virtio_hw *hw = dev->data->dev_private;
1364
1365         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1366         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1367                 VTPCI_OPS(hw)->set_queue_irq(hw,
1368                                              hw->vqs[i * VTNET_CQ],
1369                                              VIRTIO_MSI_NO_VECTOR);
1370 }
1371
1372 static int
1373 virtio_configure_intr(struct rte_eth_dev *dev)
1374 {
1375         struct virtio_hw *hw = dev->data->dev_private;
1376
1377         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1378                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1379                 return -ENOTSUP;
1380         }
1381
1382         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1383                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1384                 return -1;
1385         }
1386
1387         if (!dev->intr_handle->intr_vec) {
1388                 dev->intr_handle->intr_vec =
1389                         rte_zmalloc("intr_vec",
1390                                     hw->max_queue_pairs * sizeof(int), 0);
1391                 if (!dev->intr_handle->intr_vec) {
1392                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1393                                      hw->max_queue_pairs);
1394                         return -ENOMEM;
1395                 }
1396         }
1397
1398         /* Re-register callback to update max_intr */
1399         rte_intr_callback_unregister(dev->intr_handle,
1400                                      virtio_interrupt_handler,
1401                                      dev);
1402         rte_intr_callback_register(dev->intr_handle,
1403                                    virtio_interrupt_handler,
1404                                    dev);
1405
1406         /* DO NOT try to remove this! This function will enable msix, or QEMU
1407          * will encounter SIGSEGV when DRIVER_OK is sent.
1408          * And for legacy devices, this should be done before queue/vec binding
1409          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1410          * (22) will be ignored.
1411          */
1412         if (virtio_intr_enable(dev) < 0) {
1413                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1414                 return -1;
1415         }
1416
1417         if (virtio_queues_bind_intr(dev) < 0) {
1418                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1419                 return -1;
1420         }
1421
1422         return 0;
1423 }
1424
1425 /* reset device and renegotiate features if needed */
1426 static int
1427 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1428 {
1429         struct virtio_hw *hw = eth_dev->data->dev_private;
1430         struct virtio_net_config *config;
1431         struct virtio_net_config local_config;
1432         struct rte_pci_device *pci_dev = NULL;
1433         int ret;
1434
1435         /* Reset the device although not necessary at startup */
1436         vtpci_reset(hw);
1437
1438         if (hw->vqs) {
1439                 virtio_dev_free_mbufs(eth_dev);
1440                 virtio_free_queues(hw);
1441         }
1442
1443         /* Tell the host we've noticed this device. */
1444         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1445
1446         /* Tell the host we've known how to drive the device. */
1447         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1448         if (virtio_negotiate_features(hw, req_features) < 0)
1449                 return -1;
1450
1451         if (!hw->virtio_user_dev) {
1452                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1453                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1454         }
1455
1456         /* If host does not support both status and MSI-X then disable LSC */
1457         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1458             hw->use_msix != VIRTIO_MSIX_NONE)
1459                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1460         else
1461                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1462
1463         /* Setting up rx_header size for the device */
1464         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1465             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1466                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1467         else
1468                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1469
1470         /* Copy the permanent MAC address to: virtio_hw */
1471         virtio_get_hwaddr(hw);
1472         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1473                         &eth_dev->data->mac_addrs[0]);
1474         PMD_INIT_LOG(DEBUG,
1475                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1476                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1477                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1478
1479         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1480                 config = &local_config;
1481
1482                 vtpci_read_dev_config(hw,
1483                         offsetof(struct virtio_net_config, mac),
1484                         &config->mac, sizeof(config->mac));
1485
1486                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1487                         vtpci_read_dev_config(hw,
1488                                 offsetof(struct virtio_net_config, status),
1489                                 &config->status, sizeof(config->status));
1490                 } else {
1491                         PMD_INIT_LOG(DEBUG,
1492                                      "VIRTIO_NET_F_STATUS is not supported");
1493                         config->status = 0;
1494                 }
1495
1496                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1497                         vtpci_read_dev_config(hw,
1498                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1499                                 &config->max_virtqueue_pairs,
1500                                 sizeof(config->max_virtqueue_pairs));
1501                 } else {
1502                         PMD_INIT_LOG(DEBUG,
1503                                      "VIRTIO_NET_F_MQ is not supported");
1504                         config->max_virtqueue_pairs = 1;
1505                 }
1506
1507                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1508
1509                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1510                         vtpci_read_dev_config(hw,
1511                                 offsetof(struct virtio_net_config, mtu),
1512                                 &config->mtu,
1513                                 sizeof(config->mtu));
1514
1515                         /*
1516                          * MTU value has already been checked at negotiation
1517                          * time, but check again in case it has changed since
1518                          * then, which should not happen.
1519                          */
1520                         if (config->mtu < ETHER_MIN_MTU) {
1521                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1522                                                 config->mtu);
1523                                 return -1;
1524                         }
1525
1526                         hw->max_mtu = config->mtu;
1527                         /* Set initial MTU to maximum one supported by vhost */
1528                         eth_dev->data->mtu = config->mtu;
1529
1530                 } else {
1531                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1532                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1533                 }
1534
1535                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1536                                 config->max_virtqueue_pairs);
1537                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1538                 PMD_INIT_LOG(DEBUG,
1539                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1540                                 config->mac[0], config->mac[1],
1541                                 config->mac[2], config->mac[3],
1542                                 config->mac[4], config->mac[5]);
1543         } else {
1544                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1545                 hw->max_queue_pairs = 1;
1546                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1547                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1548         }
1549
1550         ret = virtio_alloc_queues(eth_dev);
1551         if (ret < 0)
1552                 return ret;
1553
1554         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1555                 if (virtio_configure_intr(eth_dev) < 0) {
1556                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1557                         return -1;
1558                 }
1559         }
1560
1561         vtpci_reinit_complete(hw);
1562
1563         if (pci_dev)
1564                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1565                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1566                         pci_dev->id.device_id);
1567
1568         return 0;
1569 }
1570
1571 /*
1572  * Remap the PCI device again (IO port map for legacy device and
1573  * memory map for modern device), so that the secondary process
1574  * could have the PCI initiated correctly.
1575  */
1576 static int
1577 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1578 {
1579         if (hw->modern) {
1580                 /*
1581                  * We don't have to re-parse the PCI config space, since
1582                  * rte_pci_map_device() makes sure the mapped address
1583                  * in secondary process would equal to the one mapped in
1584                  * the primary process: error will be returned if that
1585                  * requirement is not met.
1586                  *
1587                  * That said, we could simply reuse all cap pointers
1588                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1589                  * primary process, which is stored in shared memory.
1590                  */
1591                 if (rte_pci_map_device(pci_dev)) {
1592                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1593                         return -1;
1594                 }
1595         } else {
1596                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1597                         return -1;
1598         }
1599
1600         return 0;
1601 }
1602
1603 static void
1604 virtio_set_vtpci_ops(struct virtio_hw *hw)
1605 {
1606 #ifdef RTE_VIRTIO_USER
1607         if (hw->virtio_user_dev)
1608                 VTPCI_OPS(hw) = &virtio_user_ops;
1609         else
1610 #endif
1611         if (hw->modern)
1612                 VTPCI_OPS(hw) = &modern_ops;
1613         else
1614                 VTPCI_OPS(hw) = &legacy_ops;
1615 }
1616
1617 /*
1618  * This function is based on probe() function in virtio_pci.c
1619  * It returns 0 on success.
1620  */
1621 int
1622 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1623 {
1624         struct virtio_hw *hw = eth_dev->data->dev_private;
1625         int ret;
1626
1627         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1628
1629         eth_dev->dev_ops = &virtio_eth_dev_ops;
1630
1631         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1632                 if (!hw->virtio_user_dev) {
1633                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1634                         if (ret)
1635                                 return ret;
1636                 }
1637
1638                 virtio_set_vtpci_ops(hw);
1639                 set_rxtx_funcs(eth_dev);
1640
1641                 return 0;
1642         }
1643
1644         /* Allocate memory for storing MAC addresses */
1645         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1646         if (eth_dev->data->mac_addrs == NULL) {
1647                 PMD_INIT_LOG(ERR,
1648                         "Failed to allocate %d bytes needed to store MAC addresses",
1649                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1650                 return -ENOMEM;
1651         }
1652
1653         hw->port_id = eth_dev->data->port_id;
1654         /* For virtio_user case the hw->virtio_user_dev is populated by
1655          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1656          */
1657         if (!hw->virtio_user_dev) {
1658                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1659                 if (ret)
1660                         goto out;
1661         }
1662
1663         /* reset device and negotiate default features */
1664         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1665         if (ret < 0)
1666                 goto out;
1667
1668         /* Setup interrupt callback  */
1669         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1670                 rte_intr_callback_register(eth_dev->intr_handle,
1671                         virtio_interrupt_handler, eth_dev);
1672
1673         return 0;
1674
1675 out:
1676         rte_free(eth_dev->data->mac_addrs);
1677         return ret;
1678 }
1679
1680 static int
1681 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1682 {
1683         PMD_INIT_FUNC_TRACE();
1684
1685         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1686                 return -EPERM;
1687
1688         virtio_dev_stop(eth_dev);
1689         virtio_dev_close(eth_dev);
1690
1691         eth_dev->dev_ops = NULL;
1692         eth_dev->tx_pkt_burst = NULL;
1693         eth_dev->rx_pkt_burst = NULL;
1694
1695         rte_free(eth_dev->data->mac_addrs);
1696         eth_dev->data->mac_addrs = NULL;
1697
1698         /* reset interrupt callback  */
1699         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1700                 rte_intr_callback_unregister(eth_dev->intr_handle,
1701                                                 virtio_interrupt_handler,
1702                                                 eth_dev);
1703         if (eth_dev->device)
1704                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1705
1706         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1707
1708         return 0;
1709 }
1710
1711 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1712         struct rte_pci_device *pci_dev)
1713 {
1714         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1715                 eth_virtio_dev_init);
1716 }
1717
1718 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1719 {
1720         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1721 }
1722
1723 static struct rte_pci_driver rte_virtio_pmd = {
1724         .driver = {
1725                 .name = "net_virtio",
1726         },
1727         .id_table = pci_id_virtio_map,
1728         .drv_flags = 0,
1729         .probe = eth_virtio_pci_probe,
1730         .remove = eth_virtio_pci_remove,
1731 };
1732
1733 RTE_INIT(rte_virtio_pmd_init);
1734 static void
1735 rte_virtio_pmd_init(void)
1736 {
1737         if (rte_eal_iopl_init() != 0) {
1738                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1739                 return;
1740         }
1741
1742         rte_pci_register(&rte_virtio_pmd);
1743 }
1744
1745 /*
1746  * Configure virtio device
1747  * It returns 0 on success.
1748  */
1749 static int
1750 virtio_dev_configure(struct rte_eth_dev *dev)
1751 {
1752         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1753         struct virtio_hw *hw = dev->data->dev_private;
1754         uint64_t rx_offloads = rxmode->offloads;
1755         uint64_t req_features;
1756         int ret;
1757
1758         PMD_INIT_LOG(DEBUG, "configure");
1759         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1760
1761         if (dev->data->dev_conf.intr_conf.rxq) {
1762                 ret = virtio_init_device(dev, hw->req_guest_features);
1763                 if (ret < 0)
1764                         return ret;
1765         }
1766
1767         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1768                            DEV_RX_OFFLOAD_TCP_CKSUM))
1769                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1770
1771         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
1772                 req_features |=
1773                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1774                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1775
1776         /* if request features changed, reinit the device */
1777         if (req_features != hw->req_guest_features) {
1778                 ret = virtio_init_device(dev, req_features);
1779                 if (ret < 0)
1780                         return ret;
1781         }
1782
1783         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1784                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
1785                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1786                 PMD_DRV_LOG(ERR,
1787                         "rx checksum not available on this host");
1788                 return -ENOTSUP;
1789         }
1790
1791         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
1792                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1793                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
1794                 PMD_DRV_LOG(ERR,
1795                         "Large Receive Offload not available on this host");
1796                 return -ENOTSUP;
1797         }
1798
1799         /* start control queue */
1800         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1801                 virtio_dev_cq_start(dev);
1802
1803         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
1804                 hw->vlan_strip = 1;
1805
1806         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
1807             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1808                 PMD_DRV_LOG(ERR,
1809                             "vlan filtering not available on this host");
1810                 return -ENOTSUP;
1811         }
1812
1813         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1814                 /* Enable vector (0) for Link State Intrerrupt */
1815                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1816                                 VIRTIO_MSI_NO_VECTOR) {
1817                         PMD_DRV_LOG(ERR, "failed to set config vector");
1818                         return -EBUSY;
1819                 }
1820
1821         rte_spinlock_init(&hw->state_lock);
1822
1823         hw->use_simple_rx = 1;
1824         hw->use_simple_tx = 1;
1825
1826 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
1827         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1828                 hw->use_simple_rx = 0;
1829                 hw->use_simple_tx = 0;
1830         }
1831 #endif
1832         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1833                 hw->use_simple_rx = 0;
1834                 hw->use_simple_tx = 0;
1835         }
1836
1837         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1838                            DEV_RX_OFFLOAD_TCP_CKSUM))
1839                 hw->use_simple_rx = 0;
1840
1841         return 0;
1842 }
1843
1844
1845 static int
1846 virtio_dev_start(struct rte_eth_dev *dev)
1847 {
1848         uint16_t nb_queues, i;
1849         struct virtnet_rx *rxvq;
1850         struct virtnet_tx *txvq __rte_unused;
1851         struct virtio_hw *hw = dev->data->dev_private;
1852         int ret;
1853
1854         /* Finish the initialization of the queues */
1855         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1856                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1857                 if (ret < 0)
1858                         return ret;
1859         }
1860         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1861                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1862                 if (ret < 0)
1863                         return ret;
1864         }
1865
1866         /* check if lsc interrupt feature is enabled */
1867         if (dev->data->dev_conf.intr_conf.lsc) {
1868                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1869                         PMD_DRV_LOG(ERR, "link status not supported by host");
1870                         return -ENOTSUP;
1871                 }
1872         }
1873
1874         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1875          * in device configure, but it could be unmapped  when device is
1876          * stopped.
1877          */
1878         if (dev->data->dev_conf.intr_conf.lsc ||
1879             dev->data->dev_conf.intr_conf.rxq) {
1880                 virtio_intr_disable(dev);
1881
1882                 if (virtio_intr_enable(dev) < 0) {
1883                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1884                         return -EIO;
1885                 }
1886         }
1887
1888         /*Notify the backend
1889          *Otherwise the tap backend might already stop its queue due to fullness.
1890          *vhost backend will have no chance to be waked up
1891          */
1892         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1893         if (hw->max_queue_pairs > 1) {
1894                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1895                         return -EINVAL;
1896         }
1897
1898         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1899
1900         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1901                 rxvq = dev->data->rx_queues[i];
1902                 /* Flush the old packets */
1903                 virtqueue_rxvq_flush(rxvq->vq);
1904                 virtqueue_notify(rxvq->vq);
1905         }
1906
1907         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1908                 txvq = dev->data->tx_queues[i];
1909                 virtqueue_notify(txvq->vq);
1910         }
1911
1912         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1913
1914         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1915                 rxvq = dev->data->rx_queues[i];
1916                 VIRTQUEUE_DUMP(rxvq->vq);
1917         }
1918
1919         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1920                 txvq = dev->data->tx_queues[i];
1921                 VIRTQUEUE_DUMP(txvq->vq);
1922         }
1923
1924         set_rxtx_funcs(dev);
1925         hw->started = 1;
1926
1927         /* Initialize Link state */
1928         virtio_dev_link_update(dev, 0);
1929
1930         return 0;
1931 }
1932
1933 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1934 {
1935         struct virtio_hw *hw = dev->data->dev_private;
1936         uint16_t nr_vq = virtio_get_nr_vq(hw);
1937         const char *type __rte_unused;
1938         unsigned int i, mbuf_num = 0;
1939         struct virtqueue *vq;
1940         struct rte_mbuf *buf;
1941         int queue_type;
1942
1943         if (hw->vqs == NULL)
1944                 return;
1945
1946         for (i = 0; i < nr_vq; i++) {
1947                 vq = hw->vqs[i];
1948                 if (!vq)
1949                         continue;
1950
1951                 queue_type = virtio_get_queue_type(hw, i);
1952                 if (queue_type == VTNET_RQ)
1953                         type = "rxq";
1954                 else if (queue_type == VTNET_TQ)
1955                         type = "txq";
1956                 else
1957                         continue;
1958
1959                 PMD_INIT_LOG(DEBUG,
1960                         "Before freeing %s[%d] used and unused buf",
1961                         type, i);
1962                 VIRTQUEUE_DUMP(vq);
1963
1964                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
1965                         rte_pktmbuf_free(buf);
1966                         mbuf_num++;
1967                 }
1968
1969                 PMD_INIT_LOG(DEBUG,
1970                         "After freeing %s[%d] used and unused buf",
1971                         type, i);
1972                 VIRTQUEUE_DUMP(vq);
1973         }
1974
1975         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
1976 }
1977
1978 /*
1979  * Stop device: disable interrupt and mark link down
1980  */
1981 static void
1982 virtio_dev_stop(struct rte_eth_dev *dev)
1983 {
1984         struct virtio_hw *hw = dev->data->dev_private;
1985         struct rte_eth_link link;
1986         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1987
1988         PMD_INIT_LOG(DEBUG, "stop");
1989
1990         rte_spinlock_lock(&hw->state_lock);
1991         if (intr_conf->lsc || intr_conf->rxq)
1992                 virtio_intr_disable(dev);
1993
1994         hw->started = 0;
1995         memset(&link, 0, sizeof(link));
1996         rte_eth_linkstatus_set(dev, &link);
1997         rte_spinlock_unlock(&hw->state_lock);
1998 }
1999
2000 static int
2001 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2002 {
2003         struct rte_eth_link link;
2004         uint16_t status;
2005         struct virtio_hw *hw = dev->data->dev_private;
2006
2007         memset(&link, 0, sizeof(link));
2008         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2009         link.link_speed  = ETH_SPEED_NUM_10G;
2010         link.link_autoneg = ETH_LINK_FIXED;
2011
2012         if (hw->started == 0) {
2013                 link.link_status = ETH_LINK_DOWN;
2014         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2015                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2016                 vtpci_read_dev_config(hw,
2017                                 offsetof(struct virtio_net_config, status),
2018                                 &status, sizeof(status));
2019                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2020                         link.link_status = ETH_LINK_DOWN;
2021                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2022                                      dev->data->port_id);
2023                 } else {
2024                         link.link_status = ETH_LINK_UP;
2025                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2026                                      dev->data->port_id);
2027                 }
2028         } else {
2029                 link.link_status = ETH_LINK_UP;
2030         }
2031
2032         return rte_eth_linkstatus_set(dev, &link);
2033 }
2034
2035 static int
2036 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2037 {
2038         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2039         struct virtio_hw *hw = dev->data->dev_private;
2040         uint64_t offloads = rxmode->offloads;
2041
2042         if (mask & ETH_VLAN_FILTER_MASK) {
2043                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2044                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2045
2046                         PMD_DRV_LOG(NOTICE,
2047                                 "vlan filtering not available on this host");
2048
2049                         return -ENOTSUP;
2050                 }
2051         }
2052
2053         if (mask & ETH_VLAN_STRIP_MASK)
2054                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2055
2056         return 0;
2057 }
2058
2059 static void
2060 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2061 {
2062         uint64_t tso_mask, host_features;
2063         struct virtio_hw *hw = dev->data->dev_private;
2064
2065         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2066
2067         dev_info->max_rx_queues =
2068                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2069         dev_info->max_tx_queues =
2070                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2071         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2072         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2073         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2074         dev_info->default_txconf = (struct rte_eth_txconf) {
2075                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
2076         };
2077
2078         host_features = VTPCI_OPS(hw)->get_features(hw);
2079         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2080         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2081                 dev_info->rx_offload_capa |=
2082                         DEV_RX_OFFLOAD_TCP_CKSUM |
2083                         DEV_RX_OFFLOAD_UDP_CKSUM;
2084         }
2085         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2086                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2087         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2088                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2089         if ((host_features & tso_mask) == tso_mask)
2090                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2091
2092         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2093                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2094         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2095                 dev_info->tx_offload_capa |=
2096                         DEV_TX_OFFLOAD_UDP_CKSUM |
2097                         DEV_TX_OFFLOAD_TCP_CKSUM;
2098         }
2099         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2100                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2101         if ((hw->guest_features & tso_mask) == tso_mask)
2102                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2103 }
2104
2105 /*
2106  * It enables testpmd to collect per queue stats.
2107  */
2108 static int
2109 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2110 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2111 __rte_unused uint8_t is_rx)
2112 {
2113         return 0;
2114 }
2115
2116 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2117 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2118 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2119
2120 RTE_INIT(virtio_init_log);
2121 static void
2122 virtio_init_log(void)
2123 {
2124         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2125         if (virtio_logtype_init >= 0)
2126                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2127         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2128         if (virtio_logtype_driver >= 0)
2129                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2130 }