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 int 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 int
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                 return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1076         }
1077
1078         if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1079                 return -ENOTSUP;
1080
1081         virtio_set_hwaddr(hw);
1082         return 0;
1083 }
1084
1085 static int
1086 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1087 {
1088         struct virtio_hw *hw = dev->data->dev_private;
1089         struct virtio_pmd_ctrl ctrl;
1090         int len;
1091
1092         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1093                 return -ENOTSUP;
1094
1095         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1096         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1097         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1098         len = sizeof(vlan_id);
1099
1100         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1101 }
1102
1103 static int
1104 virtio_intr_enable(struct rte_eth_dev *dev)
1105 {
1106         struct virtio_hw *hw = dev->data->dev_private;
1107
1108         if (rte_intr_enable(dev->intr_handle) < 0)
1109                 return -1;
1110
1111         if (!hw->virtio_user_dev)
1112                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1113
1114         return 0;
1115 }
1116
1117 static int
1118 virtio_intr_disable(struct rte_eth_dev *dev)
1119 {
1120         struct virtio_hw *hw = dev->data->dev_private;
1121
1122         if (rte_intr_disable(dev->intr_handle) < 0)
1123                 return -1;
1124
1125         if (!hw->virtio_user_dev)
1126                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1127
1128         return 0;
1129 }
1130
1131 static int
1132 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1133 {
1134         uint64_t host_features;
1135
1136         /* Prepare guest_features: feature that driver wants to support */
1137         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1138                 req_features);
1139
1140         /* Read device(host) feature bits */
1141         host_features = VTPCI_OPS(hw)->get_features(hw);
1142         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1143                 host_features);
1144
1145         /* If supported, ensure MTU value is valid before acknowledging it. */
1146         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1147                 struct virtio_net_config config;
1148
1149                 vtpci_read_dev_config(hw,
1150                         offsetof(struct virtio_net_config, mtu),
1151                         &config.mtu, sizeof(config.mtu));
1152
1153                 if (config.mtu < ETHER_MIN_MTU)
1154                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1155         }
1156
1157         /*
1158          * Negotiate features: Subset of device feature bits are written back
1159          * guest feature bits.
1160          */
1161         hw->guest_features = req_features;
1162         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1163         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1164                 hw->guest_features);
1165
1166         if (hw->modern) {
1167                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1168                         PMD_INIT_LOG(ERR,
1169                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1170                         return -1;
1171                 }
1172                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1173                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1174                         PMD_INIT_LOG(ERR,
1175                                 "failed to set FEATURES_OK status!");
1176                         return -1;
1177                 }
1178         }
1179
1180         hw->req_guest_features = req_features;
1181
1182         return 0;
1183 }
1184
1185 int
1186 virtio_dev_pause(struct rte_eth_dev *dev)
1187 {
1188         struct virtio_hw *hw = dev->data->dev_private;
1189
1190         rte_spinlock_lock(&hw->state_lock);
1191
1192         if (hw->started == 0) {
1193                 /* Device is just stopped. */
1194                 rte_spinlock_unlock(&hw->state_lock);
1195                 return -1;
1196         }
1197         hw->started = 0;
1198         /*
1199          * Prevent the worker threads from touching queues to avoid contention,
1200          * 1 ms should be enough for the ongoing Tx function to finish.
1201          */
1202         rte_delay_ms(1);
1203         return 0;
1204 }
1205
1206 /*
1207  * Recover hw state to let the worker threads continue.
1208  */
1209 void
1210 virtio_dev_resume(struct rte_eth_dev *dev)
1211 {
1212         struct virtio_hw *hw = dev->data->dev_private;
1213
1214         hw->started = 1;
1215         rte_spinlock_unlock(&hw->state_lock);
1216 }
1217
1218 /*
1219  * Should be called only after device is paused.
1220  */
1221 int
1222 virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
1223                 int nb_pkts)
1224 {
1225         struct virtio_hw *hw = dev->data->dev_private;
1226         struct virtnet_tx *txvq = dev->data->tx_queues[0];
1227         int ret;
1228
1229         hw->inject_pkts = tx_pkts;
1230         ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
1231         hw->inject_pkts = NULL;
1232
1233         return ret;
1234 }
1235
1236 static void
1237 virtio_notify_peers(struct rte_eth_dev *dev)
1238 {
1239         struct virtio_hw *hw = dev->data->dev_private;
1240         struct virtnet_rx *rxvq;
1241         struct rte_mbuf *rarp_mbuf;
1242
1243         if (!dev->data->rx_queues)
1244                 return;
1245
1246         rxvq = dev->data->rx_queues[0];
1247         rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
1248                         (struct ether_addr *)hw->mac_addr);
1249         if (rarp_mbuf == NULL) {
1250                 PMD_DRV_LOG(ERR, "failed to make RARP packet.");
1251                 return;
1252         }
1253
1254         /* If virtio port just stopped, no need to send RARP */
1255         if (virtio_dev_pause(dev) < 0) {
1256                 rte_pktmbuf_free(rarp_mbuf);
1257                 return;
1258         }
1259
1260         virtio_inject_pkts(dev, &rarp_mbuf, 1);
1261         virtio_dev_resume(dev);
1262 }
1263
1264 static void
1265 virtio_ack_link_announce(struct rte_eth_dev *dev)
1266 {
1267         struct virtio_hw *hw = dev->data->dev_private;
1268         struct virtio_pmd_ctrl ctrl;
1269
1270         ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
1271         ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
1272
1273         virtio_send_command(hw->cvq, &ctrl, NULL, 0);
1274 }
1275
1276 /*
1277  * Process virtio config changed interrupt. Call the callback
1278  * if link state changed, generate gratuitous RARP packet if
1279  * the status indicates an ANNOUNCE.
1280  */
1281 void
1282 virtio_interrupt_handler(void *param)
1283 {
1284         struct rte_eth_dev *dev = param;
1285         struct virtio_hw *hw = dev->data->dev_private;
1286         uint8_t isr;
1287
1288         /* Read interrupt status which clears interrupt */
1289         isr = vtpci_isr(hw);
1290         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1291
1292         if (virtio_intr_enable(dev) < 0)
1293                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1294
1295         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1296                 if (virtio_dev_link_update(dev, 0) == 0)
1297                         _rte_eth_dev_callback_process(dev,
1298                                                       RTE_ETH_EVENT_INTR_LSC,
1299                                                       NULL);
1300         }
1301
1302         if (isr & VIRTIO_NET_S_ANNOUNCE) {
1303                 virtio_notify_peers(dev);
1304                 if (hw->cvq)
1305                         virtio_ack_link_announce(dev);
1306         }
1307 }
1308
1309 /* set rx and tx handlers according to what is supported */
1310 static void
1311 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1312 {
1313         struct virtio_hw *hw = eth_dev->data->dev_private;
1314
1315         if (hw->use_simple_rx) {
1316                 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1317                         eth_dev->data->port_id);
1318                 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1319         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1320                 PMD_INIT_LOG(INFO,
1321                         "virtio: using mergeable buffer Rx path on port %u",
1322                         eth_dev->data->port_id);
1323                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1324         } else {
1325                 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1326                         eth_dev->data->port_id);
1327                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1328         }
1329
1330         if (hw->use_simple_tx) {
1331                 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1332                         eth_dev->data->port_id);
1333                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1334         } else {
1335                 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1336                         eth_dev->data->port_id);
1337                 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1338         }
1339 }
1340
1341 /* Only support 1:1 queue/interrupt mapping so far.
1342  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1343  * interrupt vectors (<N+1).
1344  */
1345 static int
1346 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1347 {
1348         uint32_t i;
1349         struct virtio_hw *hw = dev->data->dev_private;
1350
1351         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1352         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1353                 dev->intr_handle->intr_vec[i] = i + 1;
1354                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1355                                                  VIRTIO_MSI_NO_VECTOR) {
1356                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1357                         return -EBUSY;
1358                 }
1359         }
1360
1361         return 0;
1362 }
1363
1364 static void
1365 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1366 {
1367         uint32_t i;
1368         struct virtio_hw *hw = dev->data->dev_private;
1369
1370         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1371         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1372                 VTPCI_OPS(hw)->set_queue_irq(hw,
1373                                              hw->vqs[i * VTNET_CQ],
1374                                              VIRTIO_MSI_NO_VECTOR);
1375 }
1376
1377 static int
1378 virtio_configure_intr(struct rte_eth_dev *dev)
1379 {
1380         struct virtio_hw *hw = dev->data->dev_private;
1381
1382         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1383                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1384                 return -ENOTSUP;
1385         }
1386
1387         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1388                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1389                 return -1;
1390         }
1391
1392         if (!dev->intr_handle->intr_vec) {
1393                 dev->intr_handle->intr_vec =
1394                         rte_zmalloc("intr_vec",
1395                                     hw->max_queue_pairs * sizeof(int), 0);
1396                 if (!dev->intr_handle->intr_vec) {
1397                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1398                                      hw->max_queue_pairs);
1399                         return -ENOMEM;
1400                 }
1401         }
1402
1403         /* Re-register callback to update max_intr */
1404         rte_intr_callback_unregister(dev->intr_handle,
1405                                      virtio_interrupt_handler,
1406                                      dev);
1407         rte_intr_callback_register(dev->intr_handle,
1408                                    virtio_interrupt_handler,
1409                                    dev);
1410
1411         /* DO NOT try to remove this! This function will enable msix, or QEMU
1412          * will encounter SIGSEGV when DRIVER_OK is sent.
1413          * And for legacy devices, this should be done before queue/vec binding
1414          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1415          * (22) will be ignored.
1416          */
1417         if (virtio_intr_enable(dev) < 0) {
1418                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1419                 return -1;
1420         }
1421
1422         if (virtio_queues_bind_intr(dev) < 0) {
1423                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1424                 return -1;
1425         }
1426
1427         return 0;
1428 }
1429
1430 /* reset device and renegotiate features if needed */
1431 static int
1432 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1433 {
1434         struct virtio_hw *hw = eth_dev->data->dev_private;
1435         struct virtio_net_config *config;
1436         struct virtio_net_config local_config;
1437         struct rte_pci_device *pci_dev = NULL;
1438         int ret;
1439
1440         /* Reset the device although not necessary at startup */
1441         vtpci_reset(hw);
1442
1443         if (hw->vqs) {
1444                 virtio_dev_free_mbufs(eth_dev);
1445                 virtio_free_queues(hw);
1446         }
1447
1448         /* Tell the host we've noticed this device. */
1449         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1450
1451         /* Tell the host we've known how to drive the device. */
1452         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1453         if (virtio_negotiate_features(hw, req_features) < 0)
1454                 return -1;
1455
1456         if (!hw->virtio_user_dev) {
1457                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1458                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1459         }
1460
1461         /* If host does not support both status and MSI-X then disable LSC */
1462         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1463             hw->use_msix != VIRTIO_MSIX_NONE)
1464                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1465         else
1466                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1467
1468         /* Setting up rx_header size for the device */
1469         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1470             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1471                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1472         else
1473                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1474
1475         /* Copy the permanent MAC address to: virtio_hw */
1476         virtio_get_hwaddr(hw);
1477         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1478                         &eth_dev->data->mac_addrs[0]);
1479         PMD_INIT_LOG(DEBUG,
1480                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1481                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1482                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1483
1484         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1485                 config = &local_config;
1486
1487                 vtpci_read_dev_config(hw,
1488                         offsetof(struct virtio_net_config, mac),
1489                         &config->mac, sizeof(config->mac));
1490
1491                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1492                         vtpci_read_dev_config(hw,
1493                                 offsetof(struct virtio_net_config, status),
1494                                 &config->status, sizeof(config->status));
1495                 } else {
1496                         PMD_INIT_LOG(DEBUG,
1497                                      "VIRTIO_NET_F_STATUS is not supported");
1498                         config->status = 0;
1499                 }
1500
1501                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1502                         vtpci_read_dev_config(hw,
1503                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1504                                 &config->max_virtqueue_pairs,
1505                                 sizeof(config->max_virtqueue_pairs));
1506                 } else {
1507                         PMD_INIT_LOG(DEBUG,
1508                                      "VIRTIO_NET_F_MQ is not supported");
1509                         config->max_virtqueue_pairs = 1;
1510                 }
1511
1512                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1513
1514                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1515                         vtpci_read_dev_config(hw,
1516                                 offsetof(struct virtio_net_config, mtu),
1517                                 &config->mtu,
1518                                 sizeof(config->mtu));
1519
1520                         /*
1521                          * MTU value has already been checked at negotiation
1522                          * time, but check again in case it has changed since
1523                          * then, which should not happen.
1524                          */
1525                         if (config->mtu < ETHER_MIN_MTU) {
1526                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1527                                                 config->mtu);
1528                                 return -1;
1529                         }
1530
1531                         hw->max_mtu = config->mtu;
1532                         /* Set initial MTU to maximum one supported by vhost */
1533                         eth_dev->data->mtu = config->mtu;
1534
1535                 } else {
1536                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1537                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1538                 }
1539
1540                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1541                                 config->max_virtqueue_pairs);
1542                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1543                 PMD_INIT_LOG(DEBUG,
1544                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1545                                 config->mac[0], config->mac[1],
1546                                 config->mac[2], config->mac[3],
1547                                 config->mac[4], config->mac[5]);
1548         } else {
1549                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1550                 hw->max_queue_pairs = 1;
1551                 hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1552                         VLAN_TAG_LEN - hw->vtnet_hdr_size;
1553         }
1554
1555         ret = virtio_alloc_queues(eth_dev);
1556         if (ret < 0)
1557                 return ret;
1558
1559         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1560                 if (virtio_configure_intr(eth_dev) < 0) {
1561                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1562                         return -1;
1563                 }
1564         }
1565
1566         vtpci_reinit_complete(hw);
1567
1568         if (pci_dev)
1569                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1570                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1571                         pci_dev->id.device_id);
1572
1573         return 0;
1574 }
1575
1576 /*
1577  * Remap the PCI device again (IO port map for legacy device and
1578  * memory map for modern device), so that the secondary process
1579  * could have the PCI initiated correctly.
1580  */
1581 static int
1582 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1583 {
1584         if (hw->modern) {
1585                 /*
1586                  * We don't have to re-parse the PCI config space, since
1587                  * rte_pci_map_device() makes sure the mapped address
1588                  * in secondary process would equal to the one mapped in
1589                  * the primary process: error will be returned if that
1590                  * requirement is not met.
1591                  *
1592                  * That said, we could simply reuse all cap pointers
1593                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1594                  * primary process, which is stored in shared memory.
1595                  */
1596                 if (rte_pci_map_device(pci_dev)) {
1597                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1598                         return -1;
1599                 }
1600         } else {
1601                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1602                         return -1;
1603         }
1604
1605         return 0;
1606 }
1607
1608 static void
1609 virtio_set_vtpci_ops(struct virtio_hw *hw)
1610 {
1611 #ifdef RTE_VIRTIO_USER
1612         if (hw->virtio_user_dev)
1613                 VTPCI_OPS(hw) = &virtio_user_ops;
1614         else
1615 #endif
1616         if (hw->modern)
1617                 VTPCI_OPS(hw) = &modern_ops;
1618         else
1619                 VTPCI_OPS(hw) = &legacy_ops;
1620 }
1621
1622 /*
1623  * This function is based on probe() function in virtio_pci.c
1624  * It returns 0 on success.
1625  */
1626 int
1627 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1628 {
1629         struct virtio_hw *hw = eth_dev->data->dev_private;
1630         int ret;
1631
1632         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1633
1634         eth_dev->dev_ops = &virtio_eth_dev_ops;
1635
1636         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1637                 if (!hw->virtio_user_dev) {
1638                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1639                         if (ret)
1640                                 return ret;
1641                 }
1642
1643                 virtio_set_vtpci_ops(hw);
1644                 set_rxtx_funcs(eth_dev);
1645
1646                 return 0;
1647         }
1648
1649         /* Allocate memory for storing MAC addresses */
1650         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1651         if (eth_dev->data->mac_addrs == NULL) {
1652                 PMD_INIT_LOG(ERR,
1653                         "Failed to allocate %d bytes needed to store MAC addresses",
1654                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1655                 return -ENOMEM;
1656         }
1657
1658         hw->port_id = eth_dev->data->port_id;
1659         /* For virtio_user case the hw->virtio_user_dev is populated by
1660          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1661          */
1662         if (!hw->virtio_user_dev) {
1663                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1664                 if (ret)
1665                         goto out;
1666         }
1667
1668         /* reset device and negotiate default features */
1669         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1670         if (ret < 0)
1671                 goto out;
1672
1673         /* Setup interrupt callback  */
1674         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1675                 rte_intr_callback_register(eth_dev->intr_handle,
1676                         virtio_interrupt_handler, eth_dev);
1677
1678         return 0;
1679
1680 out:
1681         rte_free(eth_dev->data->mac_addrs);
1682         return ret;
1683 }
1684
1685 static int
1686 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1687 {
1688         PMD_INIT_FUNC_TRACE();
1689
1690         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1691                 return -EPERM;
1692
1693         virtio_dev_stop(eth_dev);
1694         virtio_dev_close(eth_dev);
1695
1696         eth_dev->dev_ops = NULL;
1697         eth_dev->tx_pkt_burst = NULL;
1698         eth_dev->rx_pkt_burst = NULL;
1699
1700         rte_free(eth_dev->data->mac_addrs);
1701         eth_dev->data->mac_addrs = NULL;
1702
1703         /* reset interrupt callback  */
1704         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1705                 rte_intr_callback_unregister(eth_dev->intr_handle,
1706                                                 virtio_interrupt_handler,
1707                                                 eth_dev);
1708         if (eth_dev->device)
1709                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1710
1711         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1712
1713         return 0;
1714 }
1715
1716 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1717         struct rte_pci_device *pci_dev)
1718 {
1719         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1720                 eth_virtio_dev_init);
1721 }
1722
1723 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1724 {
1725         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1726 }
1727
1728 static struct rte_pci_driver rte_virtio_pmd = {
1729         .driver = {
1730                 .name = "net_virtio",
1731         },
1732         .id_table = pci_id_virtio_map,
1733         .drv_flags = 0,
1734         .probe = eth_virtio_pci_probe,
1735         .remove = eth_virtio_pci_remove,
1736 };
1737
1738 RTE_INIT(rte_virtio_pmd_init);
1739 static void
1740 rte_virtio_pmd_init(void)
1741 {
1742         if (rte_eal_iopl_init() != 0) {
1743                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1744                 return;
1745         }
1746
1747         rte_pci_register(&rte_virtio_pmd);
1748 }
1749
1750 /*
1751  * Configure virtio device
1752  * It returns 0 on success.
1753  */
1754 static int
1755 virtio_dev_configure(struct rte_eth_dev *dev)
1756 {
1757         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1758         struct virtio_hw *hw = dev->data->dev_private;
1759         uint64_t rx_offloads = rxmode->offloads;
1760         uint64_t req_features;
1761         int ret;
1762
1763         PMD_INIT_LOG(DEBUG, "configure");
1764         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1765
1766         if (dev->data->dev_conf.intr_conf.rxq) {
1767                 ret = virtio_init_device(dev, hw->req_guest_features);
1768                 if (ret < 0)
1769                         return ret;
1770         }
1771
1772         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1773                            DEV_RX_OFFLOAD_TCP_CKSUM))
1774                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1775
1776         if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
1777                 req_features |=
1778                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1779                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1780
1781         /* if request features changed, reinit the device */
1782         if (req_features != hw->req_guest_features) {
1783                 ret = virtio_init_device(dev, req_features);
1784                 if (ret < 0)
1785                         return ret;
1786         }
1787
1788         if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1789                             DEV_RX_OFFLOAD_TCP_CKSUM)) &&
1790                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1791                 PMD_DRV_LOG(ERR,
1792                         "rx checksum not available on this host");
1793                 return -ENOTSUP;
1794         }
1795
1796         if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
1797                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1798                  !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
1799                 PMD_DRV_LOG(ERR,
1800                         "Large Receive Offload not available on this host");
1801                 return -ENOTSUP;
1802         }
1803
1804         /* start control queue */
1805         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1806                 virtio_dev_cq_start(dev);
1807
1808         if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
1809                 hw->vlan_strip = 1;
1810
1811         if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
1812             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1813                 PMD_DRV_LOG(ERR,
1814                             "vlan filtering not available on this host");
1815                 return -ENOTSUP;
1816         }
1817
1818         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1819                 /* Enable vector (0) for Link State Intrerrupt */
1820                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1821                                 VIRTIO_MSI_NO_VECTOR) {
1822                         PMD_DRV_LOG(ERR, "failed to set config vector");
1823                         return -EBUSY;
1824                 }
1825
1826         rte_spinlock_init(&hw->state_lock);
1827
1828         hw->use_simple_rx = 1;
1829         hw->use_simple_tx = 1;
1830
1831 #if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
1832         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1833                 hw->use_simple_rx = 0;
1834                 hw->use_simple_tx = 0;
1835         }
1836 #endif
1837         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1838                 hw->use_simple_rx = 0;
1839                 hw->use_simple_tx = 0;
1840         }
1841
1842         if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
1843                            DEV_RX_OFFLOAD_TCP_CKSUM))
1844                 hw->use_simple_rx = 0;
1845
1846         return 0;
1847 }
1848
1849
1850 static int
1851 virtio_dev_start(struct rte_eth_dev *dev)
1852 {
1853         uint16_t nb_queues, i;
1854         struct virtnet_rx *rxvq;
1855         struct virtnet_tx *txvq __rte_unused;
1856         struct virtio_hw *hw = dev->data->dev_private;
1857         int ret;
1858
1859         /* Finish the initialization of the queues */
1860         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1861                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1862                 if (ret < 0)
1863                         return ret;
1864         }
1865         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1866                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1867                 if (ret < 0)
1868                         return ret;
1869         }
1870
1871         /* check if lsc interrupt feature is enabled */
1872         if (dev->data->dev_conf.intr_conf.lsc) {
1873                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1874                         PMD_DRV_LOG(ERR, "link status not supported by host");
1875                         return -ENOTSUP;
1876                 }
1877         }
1878
1879         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1880          * in device configure, but it could be unmapped  when device is
1881          * stopped.
1882          */
1883         if (dev->data->dev_conf.intr_conf.lsc ||
1884             dev->data->dev_conf.intr_conf.rxq) {
1885                 virtio_intr_disable(dev);
1886
1887                 if (virtio_intr_enable(dev) < 0) {
1888                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1889                         return -EIO;
1890                 }
1891         }
1892
1893         /*Notify the backend
1894          *Otherwise the tap backend might already stop its queue due to fullness.
1895          *vhost backend will have no chance to be waked up
1896          */
1897         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1898         if (hw->max_queue_pairs > 1) {
1899                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1900                         return -EINVAL;
1901         }
1902
1903         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1904
1905         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1906                 rxvq = dev->data->rx_queues[i];
1907                 /* Flush the old packets */
1908                 virtqueue_rxvq_flush(rxvq->vq);
1909                 virtqueue_notify(rxvq->vq);
1910         }
1911
1912         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1913                 txvq = dev->data->tx_queues[i];
1914                 virtqueue_notify(txvq->vq);
1915         }
1916
1917         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1918
1919         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1920                 rxvq = dev->data->rx_queues[i];
1921                 VIRTQUEUE_DUMP(rxvq->vq);
1922         }
1923
1924         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1925                 txvq = dev->data->tx_queues[i];
1926                 VIRTQUEUE_DUMP(txvq->vq);
1927         }
1928
1929         set_rxtx_funcs(dev);
1930         hw->started = 1;
1931
1932         /* Initialize Link state */
1933         virtio_dev_link_update(dev, 0);
1934
1935         return 0;
1936 }
1937
1938 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1939 {
1940         struct virtio_hw *hw = dev->data->dev_private;
1941         uint16_t nr_vq = virtio_get_nr_vq(hw);
1942         const char *type __rte_unused;
1943         unsigned int i, mbuf_num = 0;
1944         struct virtqueue *vq;
1945         struct rte_mbuf *buf;
1946         int queue_type;
1947
1948         if (hw->vqs == NULL)
1949                 return;
1950
1951         for (i = 0; i < nr_vq; i++) {
1952                 vq = hw->vqs[i];
1953                 if (!vq)
1954                         continue;
1955
1956                 queue_type = virtio_get_queue_type(hw, i);
1957                 if (queue_type == VTNET_RQ)
1958                         type = "rxq";
1959                 else if (queue_type == VTNET_TQ)
1960                         type = "txq";
1961                 else
1962                         continue;
1963
1964                 PMD_INIT_LOG(DEBUG,
1965                         "Before freeing %s[%d] used and unused buf",
1966                         type, i);
1967                 VIRTQUEUE_DUMP(vq);
1968
1969                 while ((buf = virtqueue_detach_unused(vq)) != NULL) {
1970                         rte_pktmbuf_free(buf);
1971                         mbuf_num++;
1972                 }
1973
1974                 PMD_INIT_LOG(DEBUG,
1975                         "After freeing %s[%d] used and unused buf",
1976                         type, i);
1977                 VIRTQUEUE_DUMP(vq);
1978         }
1979
1980         PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
1981 }
1982
1983 /*
1984  * Stop device: disable interrupt and mark link down
1985  */
1986 static void
1987 virtio_dev_stop(struct rte_eth_dev *dev)
1988 {
1989         struct virtio_hw *hw = dev->data->dev_private;
1990         struct rte_eth_link link;
1991         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1992
1993         PMD_INIT_LOG(DEBUG, "stop");
1994
1995         rte_spinlock_lock(&hw->state_lock);
1996         if (intr_conf->lsc || intr_conf->rxq)
1997                 virtio_intr_disable(dev);
1998
1999         hw->started = 0;
2000         memset(&link, 0, sizeof(link));
2001         rte_eth_linkstatus_set(dev, &link);
2002         rte_spinlock_unlock(&hw->state_lock);
2003 }
2004
2005 static int
2006 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
2007 {
2008         struct rte_eth_link link;
2009         uint16_t status;
2010         struct virtio_hw *hw = dev->data->dev_private;
2011
2012         memset(&link, 0, sizeof(link));
2013         link.link_duplex = ETH_LINK_FULL_DUPLEX;
2014         link.link_speed  = ETH_SPEED_NUM_10G;
2015         link.link_autoneg = ETH_LINK_FIXED;
2016
2017         if (hw->started == 0) {
2018                 link.link_status = ETH_LINK_DOWN;
2019         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
2020                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
2021                 vtpci_read_dev_config(hw,
2022                                 offsetof(struct virtio_net_config, status),
2023                                 &status, sizeof(status));
2024                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
2025                         link.link_status = ETH_LINK_DOWN;
2026                         PMD_INIT_LOG(DEBUG, "Port %d is down",
2027                                      dev->data->port_id);
2028                 } else {
2029                         link.link_status = ETH_LINK_UP;
2030                         PMD_INIT_LOG(DEBUG, "Port %d is up",
2031                                      dev->data->port_id);
2032                 }
2033         } else {
2034                 link.link_status = ETH_LINK_UP;
2035         }
2036
2037         return rte_eth_linkstatus_set(dev, &link);
2038 }
2039
2040 static int
2041 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
2042 {
2043         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
2044         struct virtio_hw *hw = dev->data->dev_private;
2045         uint64_t offloads = rxmode->offloads;
2046
2047         if (mask & ETH_VLAN_FILTER_MASK) {
2048                 if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
2049                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
2050
2051                         PMD_DRV_LOG(NOTICE,
2052                                 "vlan filtering not available on this host");
2053
2054                         return -ENOTSUP;
2055                 }
2056         }
2057
2058         if (mask & ETH_VLAN_STRIP_MASK)
2059                 hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
2060
2061         return 0;
2062 }
2063
2064 static void
2065 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
2066 {
2067         uint64_t tso_mask, host_features;
2068         struct virtio_hw *hw = dev->data->dev_private;
2069
2070         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
2071
2072         dev_info->max_rx_queues =
2073                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
2074         dev_info->max_tx_queues =
2075                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2076         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2077         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2078         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2079         dev_info->default_txconf = (struct rte_eth_txconf) {
2080                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
2081         };
2082
2083         host_features = VTPCI_OPS(hw)->get_features(hw);
2084         dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
2085         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2086                 dev_info->rx_offload_capa |=
2087                         DEV_RX_OFFLOAD_TCP_CKSUM |
2088                         DEV_RX_OFFLOAD_UDP_CKSUM;
2089         }
2090         if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
2091                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
2092         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2093                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2094         if ((host_features & tso_mask) == tso_mask)
2095                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2096
2097         dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
2098                                     DEV_TX_OFFLOAD_VLAN_INSERT;
2099         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2100                 dev_info->tx_offload_capa |=
2101                         DEV_TX_OFFLOAD_UDP_CKSUM |
2102                         DEV_TX_OFFLOAD_TCP_CKSUM;
2103         }
2104         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2105                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2106         if ((hw->guest_features & tso_mask) == tso_mask)
2107                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2108 }
2109
2110 /*
2111  * It enables testpmd to collect per queue stats.
2112  */
2113 static int
2114 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2115 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2116 __rte_unused uint8_t is_rx)
2117 {
2118         return 0;
2119 }
2120
2121 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2122 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2123 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
2124
2125 RTE_INIT(virtio_init_log);
2126 static void
2127 virtio_init_log(void)
2128 {
2129         virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
2130         if (virtio_logtype_init >= 0)
2131                 rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
2132         virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
2133         if (virtio_logtype_driver >= 0)
2134                 rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
2135 }