drivers/net/virtio/virtio_ethdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6 #include <string.h>
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <unistd.h>
  10
  11 #include <rte_ethdev.h>
  12 #include <rte_ethdev_pci.h>
  13 #include <rte_memcpy.h>
  14 #include <rte_string_fns.h>
  15 #include <rte_memzone.h>
  16 #include <rte_malloc.h>
  17 #include <rte_atomic.h>
  18 #include <rte_branch_prediction.h>
  19 #include <rte_pci.h>
  20 #include <rte_bus_pci.h>
  21 #include <rte_ether.h>
  22 #include <rte_common.h>
  23 #include <rte_errno.h>
  24 #include <rte_cpuflags.h>
  25
  26 #include <rte_memory.h>
  27 #include <rte_eal.h>
  28 #include <rte_dev.h>
  29
  30 #include "virtio_ethdev.h"
  31 #include "virtio_pci.h"
  32 #include "virtio_logs.h"
  33 #include "virtqueue.h"
  34 #include "virtio_rxtx.h"
  35
  36 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  37 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  38 static int  virtio_dev_start(struct rte_eth_dev *dev);
  39 static void virtio_dev_stop(struct rte_eth_dev *dev);
  40 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  41 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  42 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  43 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  44 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  45                                 struct rte_eth_dev_info *dev_info);
  46 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  47         int wait_to_complete);
  48 static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
  49
  50 static void virtio_set_hwaddr(struct virtio_hw *hw);
  51 static void virtio_get_hwaddr(struct virtio_hw *hw);
  52
  53 static int virtio_dev_stats_get(struct rte_eth_dev *dev,
  54                                  struct rte_eth_stats *stats);
  55 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  56                                  struct rte_eth_xstat *xstats, unsigned n);
  57 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  58                                        struct rte_eth_xstat_name *xstats_names,
  59                                        unsigned limit);
  60 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  61 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  62 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  63                                 uint16_t vlan_id, int on);
  64 static int virtio_mac_addr_add(struct rte_eth_dev *dev,
  65                                 struct ether_addr *mac_addr,
  66                                 uint32_t index, uint32_t vmdq);
  67 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  68 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  69                                 struct ether_addr *mac_addr);
  70
  71 static int virtio_intr_enable(struct rte_eth_dev *dev);
  72 static int virtio_intr_disable(struct rte_eth_dev *dev);
  73
  74 static int virtio_dev_queue_stats_mapping_set(
  75         struct rte_eth_dev *eth_dev,
  76         uint16_t queue_id,
  77         uint8_t stat_idx,
  78         uint8_t is_rx);
  79
  80 /*
  81  * The set of PCI devices this driver supports
  82  */
  83 static const struct rte_pci_id pci_id_virtio_map[] = {
  84         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
  85         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
  86         { .vendor_id = 0, /* sentinel */ },
  87 };
  88
  89 struct rte_virtio_xstats_name_off {
  90         char name[RTE_ETH_XSTATS_NAME_SIZE];
  91         unsigned offset;
  92 };
  93
  94 /* [rt]x_qX_ is prepended to the name string here */
  95 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
  96         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
  97         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
  98         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
  99         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 100         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 101         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 102         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 103         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 104         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 105         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 106         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 107         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 108         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 109 };
 110
 111 /* [rt]x_qX_ is prepended to the name string here */
 112 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 113         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 114         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 115         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 116         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 117         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 118         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 119         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 120         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 121         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 122         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 123         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 124         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 125         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 126 };
 127
 128 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 129                             sizeof(rte_virtio_rxq_stat_strings[0]))
 130 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 131                             sizeof(rte_virtio_txq_stat_strings[0]))
 132
 133 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 134
 135 static int
 136 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 137                 int *dlen, int pkt_num)
 138 {
 139         uint32_t head, i;
 140         int k, sum = 0;
 141         virtio_net_ctrl_ack status = ~0;
 142         struct virtio_pmd_ctrl *result;
 143         struct virtqueue *vq;
 144
 145         ctrl->status = status;
 146
 147         if (!cvq || !cvq->vq) {
 148                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 149                 return -1;
 150         }
 151         vq = cvq->vq;
 152         head = vq->vq_desc_head_idx;
 153
 154         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 155                 "vq->hw->cvq = %p vq = %p",
 156                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 157
 158         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 159                 return -1;
 160
 161         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 162                 sizeof(struct virtio_pmd_ctrl));
 163
 164         /*
 165          * Format is enforced in qemu code:
 166          * One TX packet for header;
 167          * At least one TX packet per argument;
 168          * One RX packet for ACK.
 169          */
 170         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 171         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 172         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 173         vq->vq_free_cnt--;
 174         i = vq->vq_ring.desc[head].next;
 175
 176         for (k = 0; k < pkt_num; k++) {
 177                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 178                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 179                         + sizeof(struct virtio_net_ctrl_hdr)
 180                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 181                 vq->vq_ring.desc[i].len = dlen[k];
 182                 sum += dlen[k];
 183                 vq->vq_free_cnt--;
 184                 i = vq->vq_ring.desc[i].next;
 185         }
 186
 187         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 188         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 189                         + sizeof(struct virtio_net_ctrl_hdr);
 190         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 191         vq->vq_free_cnt--;
 192
 193         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 194
 195         vq_update_avail_ring(vq, head);
 196         vq_update_avail_idx(vq);
 197
 198         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 199
 200         virtqueue_notify(vq);
 201
 202         rte_rmb();
 203         while (VIRTQUEUE_NUSED(vq) == 0) {
 204                 rte_rmb();
 205                 usleep(100);
 206         }
 207
 208         while (VIRTQUEUE_NUSED(vq)) {
 209                 uint32_t idx, desc_idx, used_idx;
 210                 struct vring_used_elem *uep;
 211
 212                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 213                                 & (vq->vq_nentries - 1));
 214                 uep = &vq->vq_ring.used->ring[used_idx];
 215                 idx = (uint32_t) uep->id;
 216                 desc_idx = idx;
 217
 218                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 219                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 220                         vq->vq_free_cnt++;
 221                 }
 222
 223                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 224                 vq->vq_desc_head_idx = idx;
 225
 226                 vq->vq_used_cons_idx++;
 227                 vq->vq_free_cnt++;
 228         }
 229
 230         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 231                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 232
 233         result = cvq->virtio_net_hdr_mz->addr;
 234
 235         return result->status;
 236 }
 237
 238 static int
 239 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 240 {
 241         struct virtio_hw *hw = dev->data->dev_private;
 242         struct virtio_pmd_ctrl ctrl;
 243         int dlen[1];
 244         int ret;
 245
 246         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 247         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 248         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 249
 250         dlen[0] = sizeof(uint16_t);
 251
 252         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 253         if (ret) {
 254                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 255                           "failed, this is too late now...");
 256                 return -EINVAL;
 257         }
 258
 259         return 0;
 260 }
 261
 262 static void
 263 virtio_dev_queue_release(void *queue __rte_unused)
 264 {
 265         /* do nothing */
 266 }
 267
 268 static int
 269 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
 270 {
 271         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
 272                 return VTNET_CQ;
 273         else if (vtpci_queue_idx % 2 == 0)
 274                 return VTNET_RQ;
 275         else
 276                 return VTNET_TQ;
 277 }
 278
 279 static uint16_t
 280 virtio_get_nr_vq(struct virtio_hw *hw)
 281 {
 282         uint16_t nr_vq = hw->max_queue_pairs * 2;
 283
 284         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 285                 nr_vq += 1;
 286
 287         return nr_vq;
 288 }
 289
 290 static void
 291 virtio_init_vring(struct virtqueue *vq)
 292 {
 293         int size = vq->vq_nentries;
 294         struct vring *vr = &vq->vq_ring;
 295         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 296
 297         PMD_INIT_FUNC_TRACE();
 298
 299         /*
 300          * Reinitialise since virtio port might have been stopped and restarted
 301          */
 302         memset(ring_mem, 0, vq->vq_ring_size);
 303         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 304         vq->vq_used_cons_idx = 0;
 305         vq->vq_desc_head_idx = 0;
 306         vq->vq_avail_idx = 0;
 307         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 308         vq->vq_free_cnt = vq->vq_nentries;
 309         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 310
 311         vring_desc_init(vr->desc, size);
 312
 313         /*
 314          * Disable device(host) interrupting guest
 315          */
 316         virtqueue_disable_intr(vq);
 317 }
 318
 319 static int
 320 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 321 {
 322         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 323         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 324         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 325         unsigned int vq_size, size;
 326         struct virtio_hw *hw = dev->data->dev_private;
 327         struct virtnet_rx *rxvq = NULL;
 328         struct virtnet_tx *txvq = NULL;
 329         struct virtnet_ctl *cvq = NULL;
 330         struct virtqueue *vq;
 331         size_t sz_hdr_mz = 0;
 332         void *sw_ring = NULL;
 333         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 334         int ret;
 335
 336         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 337
 338         /*
 339          * Read the virtqueue size from the Queue Size field
 340          * Always power of 2 and if 0 virtqueue does not exist
 341          */
 342         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 343         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 344         if (vq_size == 0) {
 345                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 346                 return -EINVAL;
 347         }
 348
 349         if (!rte_is_power_of_2(vq_size)) {
 350                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 351                 return -EINVAL;
 352         }
 353
 354         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 355                  dev->data->port_id, vtpci_queue_idx);
 356
 357         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 358                                 vq_size * sizeof(struct vq_desc_extra),
 359                                 RTE_CACHE_LINE_SIZE);
 360         if (queue_type == VTNET_TQ) {
 361                 /*
 362                  * For each xmit packet, allocate a virtio_net_hdr
 363                  * and indirect ring elements
 364                  */
 365                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 366         } else if (queue_type == VTNET_CQ) {
 367                 /* Allocate a page for control vq command, data and status */
 368                 sz_hdr_mz = PAGE_SIZE;
 369         }
 370
 371         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 372                                 SOCKET_ID_ANY);
 373         if (vq == NULL) {
 374                 PMD_INIT_LOG(ERR, "can not allocate vq");
 375                 return -ENOMEM;
 376         }
 377         hw->vqs[vtpci_queue_idx] = vq;
 378
 379         vq->hw = hw;
 380         vq->vq_queue_index = vtpci_queue_idx;
 381         vq->vq_nentries = vq_size;
 382
 383         /*
 384          * Reserve a memzone for vring elements
 385          */
 386         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 387         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 388         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 389                      size, vq->vq_ring_size);
 390
 391         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 392                                          SOCKET_ID_ANY,
 393                                          0, VIRTIO_PCI_VRING_ALIGN);
 394         if (mz == NULL) {
 395                 if (rte_errno == EEXIST)
 396                         mz = rte_memzone_lookup(vq_name);
 397                 if (mz == NULL) {
 398                         ret = -ENOMEM;
 399                         goto fail_q_alloc;
 400                 }
 401         }
 402
 403         memset(mz->addr, 0, mz->len);
 404
 405         vq->vq_ring_mem = mz->iova;
 406         vq->vq_ring_virt_mem = mz->addr;
 407         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 408                      (uint64_t)mz->iova);
 409         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 410                      (uint64_t)(uintptr_t)mz->addr);
 411
 412         virtio_init_vring(vq);
 413
 414         if (sz_hdr_mz) {
 415                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 416                          dev->data->port_id, vtpci_queue_idx);
 417                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 418                                                      SOCKET_ID_ANY, 0,
 419                                                      RTE_CACHE_LINE_SIZE);
 420                 if (hdr_mz == NULL) {
 421                         if (rte_errno == EEXIST)
 422                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 423                         if (hdr_mz == NULL) {
 424                                 ret = -ENOMEM;
 425                                 goto fail_q_alloc;
 426                         }
 427                 }
 428         }
 429
 430         if (queue_type == VTNET_RQ) {
 431                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 432                                sizeof(vq->sw_ring[0]);
 433
 434                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 435                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 436                 if (!sw_ring) {
 437                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 438                         ret = -ENOMEM;
 439                         goto fail_q_alloc;
 440                 }
 441
 442                 vq->sw_ring = sw_ring;
 443                 rxvq = &vq->rxq;
 444                 rxvq->vq = vq;
 445                 rxvq->port_id = dev->data->port_id;
 446                 rxvq->mz = mz;
 447         } else if (queue_type == VTNET_TQ) {
 448                 txvq = &vq->txq;
 449                 txvq->vq = vq;
 450                 txvq->port_id = dev->data->port_id;
 451                 txvq->mz = mz;
 452                 txvq->virtio_net_hdr_mz = hdr_mz;
 453                 txvq->virtio_net_hdr_mem = hdr_mz->iova;
 454         } else if (queue_type == VTNET_CQ) {
 455                 cvq = &vq->cq;
 456                 cvq->vq = vq;
 457                 cvq->mz = mz;
 458                 cvq->virtio_net_hdr_mz = hdr_mz;
 459                 cvq->virtio_net_hdr_mem = hdr_mz->iova;
 460                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 461
 462                 hw->cvq = cvq;
 463         }
 464
 465         /* For virtio_user case (that is when hw->dev is NULL), we use
 466          * virtual address. And we need properly set _offset_, please see
 467          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 468          */
 469         if (!hw->virtio_user_dev)
 470                 vq->offset = offsetof(struct rte_mbuf, buf_iova);
 471         else {
 472                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 473                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 474                 if (queue_type == VTNET_TQ)
 475                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 476                 else if (queue_type == VTNET_CQ)
 477                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 478         }
 479
 480         if (queue_type == VTNET_TQ) {
 481                 struct virtio_tx_region *txr;
 482                 unsigned int i;
 483
 484                 txr = hdr_mz->addr;
 485                 memset(txr, 0, vq_size * sizeof(*txr));
 486                 for (i = 0; i < vq_size; i++) {
 487                         struct vring_desc *start_dp = txr[i].tx_indir;
 488
 489                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 490
 491                         /* first indirect descriptor is always the tx header */
 492                         start_dp->addr = txvq->virtio_net_hdr_mem
 493                                 + i * sizeof(*txr)
 494                                 + offsetof(struct virtio_tx_region, tx_hdr);
 495
 496                         start_dp->len = hw->vtnet_hdr_size;
 497                         start_dp->flags = VRING_DESC_F_NEXT;
 498                 }
 499         }
 500
 501         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 502                 PMD_INIT_LOG(ERR, "setup_queue failed");
 503                 return -EINVAL;
 504         }
 505
 506         return 0;
 507
 508 fail_q_alloc:
 509         rte_free(sw_ring);
 510         rte_memzone_free(hdr_mz);
 511         rte_memzone_free(mz);
 512         rte_free(vq);
 513
 514         return ret;
 515 }
 516
 517 static void
 518 virtio_free_queues(struct virtio_hw *hw)
 519 {
 520         uint16_t nr_vq = virtio_get_nr_vq(hw);
 521         struct virtqueue *vq;
 522         int queue_type;
 523         uint16_t i;
 524
 525         if (hw->vqs == NULL)
 526                 return;
 527
 528         for (i = 0; i < nr_vq; i++) {
 529                 vq = hw->vqs[i];
 530                 if (!vq)
 531                         continue;
 532
 533                 queue_type = virtio_get_queue_type(hw, i);
 534                 if (queue_type == VTNET_RQ) {
 535                         rte_free(vq->sw_ring);
 536                         rte_memzone_free(vq->rxq.mz);
 537                 } else if (queue_type == VTNET_TQ) {
 538                         rte_memzone_free(vq->txq.mz);
 539                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 540                 } else {
 541                         rte_memzone_free(vq->cq.mz);
 542                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 543                 }
 544
 545                 rte_free(vq);
 546                 hw->vqs[i] = NULL;
 547         }
 548
 549         rte_free(hw->vqs);
 550         hw->vqs = NULL;
 551 }
 552
 553 static int
 554 virtio_alloc_queues(struct rte_eth_dev *dev)
 555 {
 556         struct virtio_hw *hw = dev->data->dev_private;
 557         uint16_t nr_vq = virtio_get_nr_vq(hw);
 558         uint16_t i;
 559         int ret;
 560
 561         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 562         if (!hw->vqs) {
 563                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 564                 return -ENOMEM;
 565         }
 566
 567         for (i = 0; i < nr_vq; i++) {
 568                 ret = virtio_init_queue(dev, i);
 569                 if (ret < 0) {
 570                         virtio_free_queues(hw);
 571                         return ret;
 572                 }
 573         }
 574
 575         return 0;
 576 }
 577
 578 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 579
 580 static void
 581 virtio_dev_close(struct rte_eth_dev *dev)
 582 {
 583         struct virtio_hw *hw = dev->data->dev_private;
 584         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 585
 586         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 587
 588         /* reset the NIC */
 589         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 590                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 591         if (intr_conf->rxq)
 592                 virtio_queues_unbind_intr(dev);
 593
 594         if (intr_conf->lsc || intr_conf->rxq) {
 595                 virtio_intr_disable(dev);
 596                 rte_intr_efd_disable(dev->intr_handle);
 597                 rte_free(dev->intr_handle->intr_vec);
 598                 dev->intr_handle->intr_vec = NULL;
 599         }
 600
 601         vtpci_reset(hw);
 602         virtio_dev_free_mbufs(dev);
 603         virtio_free_queues(hw);
 604 }
 605
 606 static void
 607 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 608 {
 609         struct virtio_hw *hw = dev->data->dev_private;
 610         struct virtio_pmd_ctrl ctrl;
 611         int dlen[1];
 612         int ret;
 613
 614         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 615                 PMD_INIT_LOG(INFO, "host does not support rx control");
 616                 return;
 617         }
 618
 619         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 620         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 621         ctrl.data[0] = 1;
 622         dlen[0] = 1;
 623
 624         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 625         if (ret)
 626                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 627 }
 628
 629 static void
 630 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 631 {
 632         struct virtio_hw *hw = dev->data->dev_private;
 633         struct virtio_pmd_ctrl ctrl;
 634         int dlen[1];
 635         int ret;
 636
 637         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 638                 PMD_INIT_LOG(INFO, "host does not support rx control");
 639                 return;
 640         }
 641
 642         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 643         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 644         ctrl.data[0] = 0;
 645         dlen[0] = 1;
 646
 647         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 648         if (ret)
 649                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 650 }
 651
 652 static void
 653 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 654 {
 655         struct virtio_hw *hw = dev->data->dev_private;
 656         struct virtio_pmd_ctrl ctrl;
 657         int dlen[1];
 658         int ret;
 659
 660         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 661                 PMD_INIT_LOG(INFO, "host does not support rx control");
 662                 return;
 663         }
 664
 665         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 666         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 667         ctrl.data[0] = 1;
 668         dlen[0] = 1;
 669
 670         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 671         if (ret)
 672                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 673 }
 674
 675 static void
 676 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 677 {
 678         struct virtio_hw *hw = dev->data->dev_private;
 679         struct virtio_pmd_ctrl ctrl;
 680         int dlen[1];
 681         int ret;
 682
 683         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 684                 PMD_INIT_LOG(INFO, "host does not support rx control");
 685                 return;
 686         }
 687
 688         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 689         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 690         ctrl.data[0] = 0;
 691         dlen[0] = 1;
 692
 693         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 694         if (ret)
 695                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 696 }
 697
 698 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 699 static int
 700 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 701 {
 702         struct virtio_hw *hw = dev->data->dev_private;
 703         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 704                                  hw->vtnet_hdr_size;
 705         uint32_t frame_size = mtu + ether_hdr_len;
 706         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 707
 708         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 709
 710         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 711                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 712                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 713                 return -EINVAL;
 714         }
 715         return 0;
 716 }
 717
 718 static int
 719 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 720 {
 721         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 722         struct virtqueue *vq = rxvq->vq;
 723
 724         virtqueue_enable_intr(vq);
 725         return 0;
 726 }
 727
 728 static int
 729 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 730 {
 731         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 732         struct virtqueue *vq = rxvq->vq;
 733
 734         virtqueue_disable_intr(vq);
 735         return 0;
 736 }
 737
 738 /*
 739  * dev_ops for virtio, bare necessities for basic operation
 740  */
 741 static const struct eth_dev_ops virtio_eth_dev_ops = {
 742         .dev_configure           = virtio_dev_configure,
 743         .dev_start               = virtio_dev_start,
 744         .dev_stop                = virtio_dev_stop,
 745         .dev_close               = virtio_dev_close,
 746         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 747         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 748         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 749         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 750         .mtu_set                 = virtio_mtu_set,
 751         .dev_infos_get           = virtio_dev_info_get,
 752         .stats_get               = virtio_dev_stats_get,
 753         .xstats_get              = virtio_dev_xstats_get,
 754         .xstats_get_names        = virtio_dev_xstats_get_names,
 755         .stats_reset             = virtio_dev_stats_reset,
 756         .xstats_reset            = virtio_dev_stats_reset,
 757         .link_update             = virtio_dev_link_update,
 758         .vlan_offload_set        = virtio_dev_vlan_offload_set,
 759         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 760         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 761         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 762         .rx_queue_release        = virtio_dev_queue_release,
 763         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 764         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 765         .tx_queue_release        = virtio_dev_queue_release,
 766         /* collect stats per queue */
 767         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 768         .vlan_filter_set         = virtio_vlan_filter_set,
 769         .mac_addr_add            = virtio_mac_addr_add,
 770         .mac_addr_remove         = virtio_mac_addr_remove,
 771         .mac_addr_set            = virtio_mac_addr_set,
 772 };
 773
 774 static inline int
 775 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 776                                 struct rte_eth_link *link)
 777 {
 778         struct rte_eth_link *dst = link;
 779         struct rte_eth_link *src = &(dev->data->dev_link);
 780
 781         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 782                         *(uint64_t *)src) == 0)
 783                 return -1;
 784
 785         return 0;
 786 }
 787
 788 /**
 789  * Atomically writes the link status information into global
 790  * structure rte_eth_dev.
 791  *
 792  * @param dev
 793  *   - Pointer to the structure rte_eth_dev to read from.
 794  *   - Pointer to the buffer to be saved with the link status.
 795  *
 796  * @return
 797  *   - On success, zero.
 798  *   - On failure, negative value.
 799  */
 800 static inline int
 801 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 802                 struct rte_eth_link *link)
 803 {
 804         struct rte_eth_link *dst = &(dev->data->dev_link);
 805         struct rte_eth_link *src = link;
 806
 807         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 808                                         *(uint64_t *)src) == 0)
 809                 return -1;
 810
 811         return 0;
 812 }
 813
 814 static void
 815 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 816 {
 817         unsigned i;
 818
 819         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 820                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 821                 if (txvq == NULL)
 822                         continue;
 823
 824                 stats->opackets += txvq->stats.packets;
 825                 stats->obytes += txvq->stats.bytes;
 826                 stats->oerrors += txvq->stats.errors;
 827
 828                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 829                         stats->q_opackets[i] = txvq->stats.packets;
 830                         stats->q_obytes[i] = txvq->stats.bytes;
 831                 }
 832         }
 833
 834         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 835                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 836                 if (rxvq == NULL)
 837                         continue;
 838
 839                 stats->ipackets += rxvq->stats.packets;
 840                 stats->ibytes += rxvq->stats.bytes;
 841                 stats->ierrors += rxvq->stats.errors;
 842
 843                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 844                         stats->q_ipackets[i] = rxvq->stats.packets;
 845                         stats->q_ibytes[i] = rxvq->stats.bytes;
 846                 }
 847         }
 848
 849         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 850 }
 851
 852 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 853                                        struct rte_eth_xstat_name *xstats_names,
 854                                        __rte_unused unsigned limit)
 855 {
 856         unsigned i;
 857         unsigned count = 0;
 858         unsigned t;
 859
 860         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 861                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 862
 863         if (xstats_names != NULL) {
 864                 /* Note: limit checked in rte_eth_xstats_names() */
 865
 866                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 867                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 868                         if (rxvq == NULL)
 869                                 continue;
 870                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 871                                 snprintf(xstats_names[count].name,
 872                                         sizeof(xstats_names[count].name),
 873                                         "rx_q%u_%s", i,
 874                                         rte_virtio_rxq_stat_strings[t].name);
 875                                 count++;
 876                         }
 877                 }
 878
 879                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 880                         struct virtqueue *txvq = dev->data->tx_queues[i];
 881                         if (txvq == NULL)
 882                                 continue;
 883                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 884                                 snprintf(xstats_names[count].name,
 885                                         sizeof(xstats_names[count].name),
 886                                         "tx_q%u_%s", i,
 887                                         rte_virtio_txq_stat_strings[t].name);
 888                                 count++;
 889                         }
 890                 }
 891                 return count;
 892         }
 893         return nstats;
 894 }
 895
 896 static int
 897 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 898                       unsigned n)
 899 {
 900         unsigned i;
 901         unsigned count = 0;
 902
 903         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 904                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 905
 906         if (n < nstats)
 907                 return nstats;
 908
 909         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 910                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 911
 912                 if (rxvq == NULL)
 913                         continue;
 914
 915                 unsigned t;
 916
 917                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 918                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 919                                 rte_virtio_rxq_stat_strings[t].offset);
 920                         xstats[count].id = count;
 921                         count++;
 922                 }
 923         }
 924
 925         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 926                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 927
 928                 if (txvq == NULL)
 929                         continue;
 930
 931                 unsigned t;
 932
 933                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 934                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 935                                 rte_virtio_txq_stat_strings[t].offset);
 936                         xstats[count].id = count;
 937                         count++;
 938                 }
 939         }
 940
 941         return count;
 942 }
 943
 944 static int
 945 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 946 {
 947         virtio_update_stats(dev, stats);
 948
 949         return 0;
 950 }
 951
 952 static void
 953 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 954 {
 955         unsigned int i;
 956
 957         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 958                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 959                 if (txvq == NULL)
 960                         continue;
 961
 962                 txvq->stats.packets = 0;
 963                 txvq->stats.bytes = 0;
 964                 txvq->stats.errors = 0;
 965                 txvq->stats.multicast = 0;
 966                 txvq->stats.broadcast = 0;
 967                 memset(txvq->stats.size_bins, 0,
 968                        sizeof(txvq->stats.size_bins[0]) * 8);
 969         }
 970
 971         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 972                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 973                 if (rxvq == NULL)
 974                         continue;
 975
 976                 rxvq->stats.packets = 0;
 977                 rxvq->stats.bytes = 0;
 978                 rxvq->stats.errors = 0;
 979                 rxvq->stats.multicast = 0;
 980                 rxvq->stats.broadcast = 0;
 981                 memset(rxvq->stats.size_bins, 0,
 982                        sizeof(rxvq->stats.size_bins[0]) * 8);
 983         }
 984 }
 985
 986 static void
 987 virtio_set_hwaddr(struct virtio_hw *hw)
 988 {
 989         vtpci_write_dev_config(hw,
 990                         offsetof(struct virtio_net_config, mac),
 991                         &hw->mac_addr, ETHER_ADDR_LEN);
 992 }
 993
 994 static void
 995 virtio_get_hwaddr(struct virtio_hw *hw)
 996 {
 997         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 998                 vtpci_read_dev_config(hw,
 999                         offsetof(struct virtio_net_config, mac),
1000                         &hw->mac_addr, ETHER_ADDR_LEN);
1001         } else {
1002                 eth_random_addr(&hw->mac_addr[0]);
1003                 virtio_set_hwaddr(hw);
1004         }
1005 }
1006
1007 static int
1008 virtio_mac_table_set(struct virtio_hw *hw,
1009                      const struct virtio_net_ctrl_mac *uc,
1010                      const struct virtio_net_ctrl_mac *mc)
1011 {
1012         struct virtio_pmd_ctrl ctrl;
1013         int err, len[2];
1014
1015         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1016                 PMD_DRV_LOG(INFO, "host does not support mac table");
1017                 return -1;
1018         }
1019
1020         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1021         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1022
1023         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1024         memcpy(ctrl.data, uc, len[0]);
1025
1026         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1027         memcpy(ctrl.data + len[0], mc, len[1]);
1028
1029         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1030         if (err != 0)
1031                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1032         return err;
1033 }
1034
1035 static int
1036 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1037                     uint32_t index, uint32_t vmdq __rte_unused)
1038 {
1039         struct virtio_hw *hw = dev->data->dev_private;
1040         const struct ether_addr *addrs = dev->data->mac_addrs;
1041         unsigned int i;
1042         struct virtio_net_ctrl_mac *uc, *mc;
1043
1044         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1045                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1046                 return -EINVAL;
1047         }
1048
1049         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1050         uc->entries = 0;
1051         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1052         mc->entries = 0;
1053
1054         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1055                 const struct ether_addr *addr
1056                         = (i == index) ? mac_addr : addrs + i;
1057                 struct virtio_net_ctrl_mac *tbl
1058                         = is_multicast_ether_addr(addr) ? mc : uc;
1059
1060                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1061         }
1062
1063         return virtio_mac_table_set(hw, uc, mc);
1064 }
1065
1066 static void
1067 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1068 {
1069         struct virtio_hw *hw = dev->data->dev_private;
1070         struct ether_addr *addrs = dev->data->mac_addrs;
1071         struct virtio_net_ctrl_mac *uc, *mc;
1072         unsigned int i;
1073
1074         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1075                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1076                 return;
1077         }
1078
1079         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1080         uc->entries = 0;
1081         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1082         mc->entries = 0;
1083
1084         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1085                 struct virtio_net_ctrl_mac *tbl;
1086
1087                 if (i == index || is_zero_ether_addr(addrs + i))
1088                         continue;
1089
1090                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1091                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1092         }
1093
1094         virtio_mac_table_set(hw, uc, mc);
1095 }
1096
1097 static void
1098 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1099 {
1100         struct virtio_hw *hw = dev->data->dev_private;
1101
1102         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1103
1104         /* Use atomic update if available */
1105         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1106                 struct virtio_pmd_ctrl ctrl;
1107                 int len = ETHER_ADDR_LEN;
1108
1109                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1110                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1111
1112                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1113                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1114         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1115                 virtio_set_hwaddr(hw);
1116 }
1117
1118 static int
1119 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1120 {
1121         struct virtio_hw *hw = dev->data->dev_private;
1122         struct virtio_pmd_ctrl ctrl;
1123         int len;
1124
1125         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1126                 return -ENOTSUP;
1127
1128         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1129         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1130         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1131         len = sizeof(vlan_id);
1132
1133         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1134 }
1135
1136 static int
1137 virtio_intr_enable(struct rte_eth_dev *dev)
1138 {
1139         struct virtio_hw *hw = dev->data->dev_private;
1140
1141         if (rte_intr_enable(dev->intr_handle) < 0)
1142                 return -1;
1143
1144         if (!hw->virtio_user_dev)
1145                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1146
1147         return 0;
1148 }
1149
1150 static int
1151 virtio_intr_disable(struct rte_eth_dev *dev)
1152 {
1153         struct virtio_hw *hw = dev->data->dev_private;
1154
1155         if (rte_intr_disable(dev->intr_handle) < 0)
1156                 return -1;
1157
1158         if (!hw->virtio_user_dev)
1159                 hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
1160
1161         return 0;
1162 }
1163
1164 static int
1165 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1166 {
1167         uint64_t host_features;
1168
1169         /* Prepare guest_features: feature that driver wants to support */
1170         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1171                 req_features);
1172
1173         /* Read device(host) feature bits */
1174         host_features = VTPCI_OPS(hw)->get_features(hw);
1175         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1176                 host_features);
1177
1178         /* If supported, ensure MTU value is valid before acknowledging it. */
1179         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1180                 struct virtio_net_config config;
1181
1182                 vtpci_read_dev_config(hw,
1183                         offsetof(struct virtio_net_config, mtu),
1184                         &config.mtu, sizeof(config.mtu));
1185
1186                 if (config.mtu < ETHER_MIN_MTU)
1187                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1188         }
1189
1190         /*
1191          * Negotiate features: Subset of device feature bits are written back
1192          * guest feature bits.
1193          */
1194         hw->guest_features = req_features;
1195         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1196         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1197                 hw->guest_features);
1198
1199         if (hw->modern) {
1200                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1201                         PMD_INIT_LOG(ERR,
1202                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1203                         return -1;
1204                 }
1205                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1206                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1207                         PMD_INIT_LOG(ERR,
1208                                 "failed to set FEATURES_OK status!");
1209                         return -1;
1210                 }
1211         }
1212
1213         hw->req_guest_features = req_features;
1214
1215         return 0;
1216 }
1217
1218 /*
1219  * Process Virtio Config changed interrupt and call the callback
1220  * if link state changed.
1221  */
1222 void
1223 virtio_interrupt_handler(void *param)
1224 {
1225         struct rte_eth_dev *dev = param;
1226         struct virtio_hw *hw = dev->data->dev_private;
1227         uint8_t isr;
1228
1229         /* Read interrupt status which clears interrupt */
1230         isr = vtpci_isr(hw);
1231         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1232
1233         if (virtio_intr_enable(dev) < 0)
1234                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1235
1236         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1237                 if (virtio_dev_link_update(dev, 0) == 0)
1238                         _rte_eth_dev_callback_process(dev,
1239                                                       RTE_ETH_EVENT_INTR_LSC,
1240                                                       NULL, NULL);
1241         }
1242
1243 }
1244
1245 /* set rx and tx handlers according to what is supported */
1246 static void
1247 set_rxtx_funcs(struct rte_eth_dev *eth_dev)
1248 {
1249         struct virtio_hw *hw = eth_dev->data->dev_private;
1250
1251         if (hw->use_simple_rx) {
1252                 PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
1253                         eth_dev->data->port_id);
1254                 eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1255         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1256                 PMD_INIT_LOG(INFO,
1257                         "virtio: using mergeable buffer Rx path on port %u",
1258                         eth_dev->data->port_id);
1259                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1260         } else {
1261                 PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
1262                         eth_dev->data->port_id);
1263                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1264         }
1265
1266         if (hw->use_simple_tx) {
1267                 PMD_INIT_LOG(INFO, "virtio: using simple Tx path on port %u",
1268                         eth_dev->data->port_id);
1269                 eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1270         } else {
1271                 PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
1272                         eth_dev->data->port_id);
1273                 eth_dev->tx_pkt_burst = virtio_xmit_pkts;
1274         }
1275 }
1276
1277 /* Only support 1:1 queue/interrupt mapping so far.
1278  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1279  * interrupt vectors (<N+1).
1280  */
1281 static int
1282 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1283 {
1284         uint32_t i;
1285         struct virtio_hw *hw = dev->data->dev_private;
1286
1287         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1288         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1289                 dev->intr_handle->intr_vec[i] = i + 1;
1290                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1291                                                  VIRTIO_MSI_NO_VECTOR) {
1292                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1293                         return -EBUSY;
1294                 }
1295         }
1296
1297         return 0;
1298 }
1299
1300 static void
1301 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1302 {
1303         uint32_t i;
1304         struct virtio_hw *hw = dev->data->dev_private;
1305
1306         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1307         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1308                 VTPCI_OPS(hw)->set_queue_irq(hw,
1309                                              hw->vqs[i * VTNET_CQ],
1310                                              VIRTIO_MSI_NO_VECTOR);
1311 }
1312
1313 static int
1314 virtio_configure_intr(struct rte_eth_dev *dev)
1315 {
1316         struct virtio_hw *hw = dev->data->dev_private;
1317
1318         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1319                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1320                 return -ENOTSUP;
1321         }
1322
1323         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1324                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1325                 return -1;
1326         }
1327
1328         if (!dev->intr_handle->intr_vec) {
1329                 dev->intr_handle->intr_vec =
1330                         rte_zmalloc("intr_vec",
1331                                     hw->max_queue_pairs * sizeof(int), 0);
1332                 if (!dev->intr_handle->intr_vec) {
1333                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1334                                      hw->max_queue_pairs);
1335                         return -ENOMEM;
1336                 }
1337         }
1338
1339         /* Re-register callback to update max_intr */
1340         rte_intr_callback_unregister(dev->intr_handle,
1341                                      virtio_interrupt_handler,
1342                                      dev);
1343         rte_intr_callback_register(dev->intr_handle,
1344                                    virtio_interrupt_handler,
1345                                    dev);
1346
1347         /* DO NOT try to remove this! This function will enable msix, or QEMU
1348          * will encounter SIGSEGV when DRIVER_OK is sent.
1349          * And for legacy devices, this should be done before queue/vec binding
1350          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1351          * (22) will be ignored.
1352          */
1353         if (virtio_intr_enable(dev) < 0) {
1354                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1355                 return -1;
1356         }
1357
1358         if (virtio_queues_bind_intr(dev) < 0) {
1359                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1360                 return -1;
1361         }
1362
1363         return 0;
1364 }
1365
1366 /* reset device and renegotiate features if needed */
1367 static int
1368 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1369 {
1370         struct virtio_hw *hw = eth_dev->data->dev_private;
1371         struct virtio_net_config *config;
1372         struct virtio_net_config local_config;
1373         struct rte_pci_device *pci_dev = NULL;
1374         int ret;
1375
1376         /* Reset the device although not necessary at startup */
1377         vtpci_reset(hw);
1378
1379         /* Tell the host we've noticed this device. */
1380         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1381
1382         /* Tell the host we've known how to drive the device. */
1383         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1384         if (virtio_negotiate_features(hw, req_features) < 0)
1385                 return -1;
1386
1387         if (!hw->virtio_user_dev) {
1388                 pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
1389                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1390         }
1391
1392         /* If host does not support both status and MSI-X then disable LSC */
1393         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
1394             hw->use_msix != VIRTIO_MSIX_NONE)
1395                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1396         else
1397                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1398
1399         /* Setting up rx_header size for the device */
1400         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1401             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1402                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1403         else
1404                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1405
1406         /* Copy the permanent MAC address to: virtio_hw */
1407         virtio_get_hwaddr(hw);
1408         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1409                         &eth_dev->data->mac_addrs[0]);
1410         PMD_INIT_LOG(DEBUG,
1411                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1412                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1413                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1414
1415         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1416                 config = &local_config;
1417
1418                 vtpci_read_dev_config(hw,
1419                         offsetof(struct virtio_net_config, mac),
1420                         &config->mac, sizeof(config->mac));
1421
1422                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1423                         vtpci_read_dev_config(hw,
1424                                 offsetof(struct virtio_net_config, status),
1425                                 &config->status, sizeof(config->status));
1426                 } else {
1427                         PMD_INIT_LOG(DEBUG,
1428                                      "VIRTIO_NET_F_STATUS is not supported");
1429                         config->status = 0;
1430                 }
1431
1432                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1433                         vtpci_read_dev_config(hw,
1434                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1435                                 &config->max_virtqueue_pairs,
1436                                 sizeof(config->max_virtqueue_pairs));
1437                 } else {
1438                         PMD_INIT_LOG(DEBUG,
1439                                      "VIRTIO_NET_F_MQ is not supported");
1440                         config->max_virtqueue_pairs = 1;
1441                 }
1442
1443                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1444
1445                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1446                         vtpci_read_dev_config(hw,
1447                                 offsetof(struct virtio_net_config, mtu),
1448                                 &config->mtu,
1449                                 sizeof(config->mtu));
1450
1451                         /*
1452                          * MTU value has already been checked at negotiation
1453                          * time, but check again in case it has changed since
1454                          * then, which should not happen.
1455                          */
1456                         if (config->mtu < ETHER_MIN_MTU) {
1457                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1458                                                 config->mtu);
1459                                 return -1;
1460                         }
1461
1462                         hw->max_mtu = config->mtu;
1463                         /* Set initial MTU to maximum one supported by vhost */
1464                         eth_dev->data->mtu = config->mtu;
1465
1466                 } else {
1467                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1468                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1469                 }
1470
1471                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1472                                 config->max_virtqueue_pairs);
1473                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1474                 PMD_INIT_LOG(DEBUG,
1475                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1476                                 config->mac[0], config->mac[1],
1477                                 config->mac[2], config->mac[3],
1478                                 config->mac[4], config->mac[5]);
1479         } else {
1480                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1481                 hw->max_queue_pairs = 1;
1482         }
1483
1484         ret = virtio_alloc_queues(eth_dev);
1485         if (ret < 0)
1486                 return ret;
1487
1488         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1489                 if (virtio_configure_intr(eth_dev) < 0) {
1490                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1491                         return -1;
1492                 }
1493         }
1494
1495         vtpci_reinit_complete(hw);
1496
1497         if (pci_dev)
1498                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1499                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1500                         pci_dev->id.device_id);
1501
1502         return 0;
1503 }
1504
1505 /*
1506  * Remap the PCI device again (IO port map for legacy device and
1507  * memory map for modern device), so that the secondary process
1508  * could have the PCI initiated correctly.
1509  */
1510 static int
1511 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1512 {
1513         if (hw->modern) {
1514                 /*
1515                  * We don't have to re-parse the PCI config space, since
1516                  * rte_pci_map_device() makes sure the mapped address
1517                  * in secondary process would equal to the one mapped in
1518                  * the primary process: error will be returned if that
1519                  * requirement is not met.
1520                  *
1521                  * That said, we could simply reuse all cap pointers
1522                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1523                  * primary process, which is stored in shared memory.
1524                  */
1525                 if (rte_pci_map_device(pci_dev)) {
1526                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1527                         return -1;
1528                 }
1529         } else {
1530                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1531                         return -1;
1532         }
1533
1534         return 0;
1535 }
1536
1537 static void
1538 virtio_set_vtpci_ops(struct virtio_hw *hw)
1539 {
1540 #ifdef RTE_VIRTIO_USER
1541         if (hw->virtio_user_dev)
1542                 VTPCI_OPS(hw) = &virtio_user_ops;
1543         else
1544 #endif
1545         if (hw->modern)
1546                 VTPCI_OPS(hw) = &modern_ops;
1547         else
1548                 VTPCI_OPS(hw) = &legacy_ops;
1549 }
1550
1551 /*
1552  * This function is based on probe() function in virtio_pci.c
1553  * It returns 0 on success.
1554  */
1555 int
1556 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1557 {
1558         struct virtio_hw *hw = eth_dev->data->dev_private;
1559         int ret;
1560
1561         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1562
1563         eth_dev->dev_ops = &virtio_eth_dev_ops;
1564
1565         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1566                 if (!hw->virtio_user_dev) {
1567                         ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1568                         if (ret)
1569                                 return ret;
1570                 }
1571
1572                 virtio_set_vtpci_ops(hw);
1573                 set_rxtx_funcs(eth_dev);
1574
1575                 return 0;
1576         }
1577
1578         /* Allocate memory for storing MAC addresses */
1579         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1580         if (eth_dev->data->mac_addrs == NULL) {
1581                 PMD_INIT_LOG(ERR,
1582                         "Failed to allocate %d bytes needed to store MAC addresses",
1583                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1584                 return -ENOMEM;
1585         }
1586
1587         hw->port_id = eth_dev->data->port_id;
1588         /* For virtio_user case the hw->virtio_user_dev is populated by
1589          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1590          */
1591         if (!hw->virtio_user_dev) {
1592                 ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
1593                 if (ret)
1594                         goto out;
1595         }
1596
1597         /* reset device and negotiate default features */
1598         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1599         if (ret < 0)
1600                 goto out;
1601
1602         /* Setup interrupt callback  */
1603         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1604                 rte_intr_callback_register(eth_dev->intr_handle,
1605                         virtio_interrupt_handler, eth_dev);
1606
1607         return 0;
1608
1609 out:
1610         rte_free(eth_dev->data->mac_addrs);
1611         return ret;
1612 }
1613
1614 static int
1615 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1616 {
1617         PMD_INIT_FUNC_TRACE();
1618
1619         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1620                 return -EPERM;
1621
1622         virtio_dev_stop(eth_dev);
1623         virtio_dev_close(eth_dev);
1624
1625         eth_dev->dev_ops = NULL;
1626         eth_dev->tx_pkt_burst = NULL;
1627         eth_dev->rx_pkt_burst = NULL;
1628
1629         rte_free(eth_dev->data->mac_addrs);
1630         eth_dev->data->mac_addrs = NULL;
1631
1632         /* reset interrupt callback  */
1633         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1634                 rte_intr_callback_unregister(eth_dev->intr_handle,
1635                                                 virtio_interrupt_handler,
1636                                                 eth_dev);
1637         if (eth_dev->device)
1638                 rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
1639
1640         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1641
1642         return 0;
1643 }
1644
1645 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1646         struct rte_pci_device *pci_dev)
1647 {
1648         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1649                 eth_virtio_dev_init);
1650 }
1651
1652 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1653 {
1654         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1655 }
1656
1657 static struct rte_pci_driver rte_virtio_pmd = {
1658         .driver = {
1659                 .name = "net_virtio",
1660         },
1661         .id_table = pci_id_virtio_map,
1662         .drv_flags = 0,
1663         .probe = eth_virtio_pci_probe,
1664         .remove = eth_virtio_pci_remove,
1665 };
1666
1667 RTE_INIT(rte_virtio_pmd_init);
1668 static void
1669 rte_virtio_pmd_init(void)
1670 {
1671         if (rte_eal_iopl_init() != 0) {
1672                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1673                 return;
1674         }
1675
1676         rte_pci_register(&rte_virtio_pmd);
1677 }
1678
1679 /*
1680  * Configure virtio device
1681  * It returns 0 on success.
1682  */
1683 static int
1684 virtio_dev_configure(struct rte_eth_dev *dev)
1685 {
1686         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1687         struct virtio_hw *hw = dev->data->dev_private;
1688         uint64_t req_features;
1689         int ret;
1690
1691         PMD_INIT_LOG(DEBUG, "configure");
1692         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1693
1694         if (dev->data->dev_conf.intr_conf.rxq) {
1695                 ret = virtio_init_device(dev, hw->req_guest_features);
1696                 if (ret < 0)
1697                         return ret;
1698         }
1699
1700         /* The name hw_ip_checksum is a bit confusing since it can be
1701          * set by the application to request L3 and/or L4 checksums. In
1702          * case of virtio, only L4 checksum is supported.
1703          */
1704         if (rxmode->hw_ip_checksum)
1705                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1706
1707         if (rxmode->enable_lro)
1708                 req_features |=
1709                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1710                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1711
1712         /* if request features changed, reinit the device */
1713         if (req_features != hw->req_guest_features) {
1714                 ret = virtio_init_device(dev, req_features);
1715                 if (ret < 0)
1716                         return ret;
1717         }
1718
1719         if (rxmode->hw_ip_checksum &&
1720                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1721                 PMD_DRV_LOG(ERR,
1722                         "rx checksum not available on this host");
1723                 return -ENOTSUP;
1724         }
1725
1726         if (rxmode->enable_lro &&
1727                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1728                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1729                 PMD_DRV_LOG(ERR,
1730                         "Large Receive Offload not available on this host");
1731                 return -ENOTSUP;
1732         }
1733
1734         /* start control queue */
1735         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1736                 virtio_dev_cq_start(dev);
1737
1738         hw->vlan_strip = rxmode->hw_vlan_strip;
1739
1740         if (rxmode->hw_vlan_filter
1741             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1742                 PMD_DRV_LOG(ERR,
1743                             "vlan filtering not available on this host");
1744                 return -ENOTSUP;
1745         }
1746
1747         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1748                 /* Enable vector (0) for Link State Intrerrupt */
1749                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1750                                 VIRTIO_MSI_NO_VECTOR) {
1751                         PMD_DRV_LOG(ERR, "failed to set config vector");
1752                         return -EBUSY;
1753                 }
1754
1755         hw->use_simple_rx = 1;
1756         hw->use_simple_tx = 1;
1757
1758 #if defined RTE_ARCH_ARM64 || defined CONFIG_RTE_ARCH_ARM
1759         if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
1760                 hw->use_simple_rx = 0;
1761                 hw->use_simple_tx = 0;
1762         }
1763 #endif
1764         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1765                 hw->use_simple_rx = 0;
1766                 hw->use_simple_tx = 0;
1767         }
1768
1769         if (rxmode->hw_ip_checksum)
1770                 hw->use_simple_rx = 0;
1771
1772         return 0;
1773 }
1774
1775
1776 static int
1777 virtio_dev_start(struct rte_eth_dev *dev)
1778 {
1779         uint16_t nb_queues, i;
1780         struct virtnet_rx *rxvq;
1781         struct virtnet_tx *txvq __rte_unused;
1782         struct virtio_hw *hw = dev->data->dev_private;
1783         int ret;
1784
1785         /* Finish the initialization of the queues */
1786         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1787                 ret = virtio_dev_rx_queue_setup_finish(dev, i);
1788                 if (ret < 0)
1789                         return ret;
1790         }
1791         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1792                 ret = virtio_dev_tx_queue_setup_finish(dev, i);
1793                 if (ret < 0)
1794                         return ret;
1795         }
1796
1797         /* check if lsc interrupt feature is enabled */
1798         if (dev->data->dev_conf.intr_conf.lsc) {
1799                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1800                         PMD_DRV_LOG(ERR, "link status not supported by host");
1801                         return -ENOTSUP;
1802                 }
1803         }
1804
1805         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1806          * in device configure, but it could be unmapped  when device is
1807          * stopped.
1808          */
1809         if (dev->data->dev_conf.intr_conf.lsc ||
1810             dev->data->dev_conf.intr_conf.rxq) {
1811                 virtio_intr_disable(dev);
1812
1813                 if (virtio_intr_enable(dev) < 0) {
1814                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1815                         return -EIO;
1816                 }
1817         }
1818
1819         /*Notify the backend
1820          *Otherwise the tap backend might already stop its queue due to fullness.
1821          *vhost backend will have no chance to be waked up
1822          */
1823         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1824         if (hw->max_queue_pairs > 1) {
1825                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1826                         return -EINVAL;
1827         }
1828
1829         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1830
1831         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1832                 rxvq = dev->data->rx_queues[i];
1833                 /* Flush the old packets */
1834                 virtqueue_flush(rxvq->vq);
1835                 virtqueue_notify(rxvq->vq);
1836         }
1837
1838         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1839                 txvq = dev->data->tx_queues[i];
1840                 virtqueue_notify(txvq->vq);
1841         }
1842
1843         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1844
1845         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1846                 rxvq = dev->data->rx_queues[i];
1847                 VIRTQUEUE_DUMP(rxvq->vq);
1848         }
1849
1850         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1851                 txvq = dev->data->tx_queues[i];
1852                 VIRTQUEUE_DUMP(txvq->vq);
1853         }
1854
1855         set_rxtx_funcs(dev);
1856         hw->started = 1;
1857
1858         /* Initialize Link state */
1859         virtio_dev_link_update(dev, 0);
1860
1861         return 0;
1862 }
1863
1864 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1865 {
1866         struct rte_mbuf *buf;
1867         int i, mbuf_num = 0;
1868
1869         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1870                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1871
1872                 PMD_INIT_LOG(DEBUG,
1873                              "Before freeing rxq[%d] used and unused buf", i);
1874                 VIRTQUEUE_DUMP(rxvq->vq);
1875
1876                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1877                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1878                         rte_pktmbuf_free(buf);
1879                         mbuf_num++;
1880                 }
1881
1882                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1883                 PMD_INIT_LOG(DEBUG,
1884                              "After freeing rxq[%d] used and unused buf", i);
1885                 VIRTQUEUE_DUMP(rxvq->vq);
1886         }
1887
1888         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1889                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1890
1891                 PMD_INIT_LOG(DEBUG,
1892                              "Before freeing txq[%d] used and unused bufs",
1893                              i);
1894                 VIRTQUEUE_DUMP(txvq->vq);
1895
1896                 mbuf_num = 0;
1897                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1898                         rte_pktmbuf_free(buf);
1899                         mbuf_num++;
1900                 }
1901
1902                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1903                 PMD_INIT_LOG(DEBUG,
1904                              "After freeing txq[%d] used and unused buf", i);
1905                 VIRTQUEUE_DUMP(txvq->vq);
1906         }
1907 }
1908
1909 /*
1910  * Stop device: disable interrupt and mark link down
1911  */
1912 static void
1913 virtio_dev_stop(struct rte_eth_dev *dev)
1914 {
1915         struct virtio_hw *hw = dev->data->dev_private;
1916         struct rte_eth_link link;
1917         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1918
1919         PMD_INIT_LOG(DEBUG, "stop");
1920
1921         if (intr_conf->lsc || intr_conf->rxq)
1922                 virtio_intr_disable(dev);
1923
1924         hw->started = 0;
1925         memset(&link, 0, sizeof(link));
1926         virtio_dev_atomic_write_link_status(dev, &link);
1927 }
1928
1929 static int
1930 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1931 {
1932         struct rte_eth_link link, old;
1933         uint16_t status;
1934         struct virtio_hw *hw = dev->data->dev_private;
1935         memset(&link, 0, sizeof(link));
1936         virtio_dev_atomic_read_link_status(dev, &link);
1937         old = link;
1938         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1939         link.link_speed  = ETH_SPEED_NUM_10G;
1940
1941         if (hw->started == 0) {
1942                 link.link_status = ETH_LINK_DOWN;
1943         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1944                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1945                 vtpci_read_dev_config(hw,
1946                                 offsetof(struct virtio_net_config, status),
1947                                 &status, sizeof(status));
1948                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1949                         link.link_status = ETH_LINK_DOWN;
1950                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1951                                      dev->data->port_id);
1952                 } else {
1953                         link.link_status = ETH_LINK_UP;
1954                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1955                                      dev->data->port_id);
1956                 }
1957         } else {
1958                 link.link_status = ETH_LINK_UP;
1959         }
1960         virtio_dev_atomic_write_link_status(dev, &link);
1961
1962         return (old.link_status == link.link_status) ? -1 : 0;
1963 }
1964
1965 static int
1966 virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
1967 {
1968         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1969         struct virtio_hw *hw = dev->data->dev_private;
1970
1971         if (mask & ETH_VLAN_FILTER_MASK) {
1972                 if (rxmode->hw_vlan_filter &&
1973                                 !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1974
1975                         PMD_DRV_LOG(NOTICE,
1976                                 "vlan filtering not available on this host");
1977
1978                         return -ENOTSUP;
1979                 }
1980         }
1981
1982         if (mask & ETH_VLAN_STRIP_MASK)
1983                 hw->vlan_strip = rxmode->hw_vlan_strip;
1984
1985         return 0;
1986 }
1987
1988 static void
1989 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1990 {
1991         uint64_t tso_mask, host_features;
1992         struct virtio_hw *hw = dev->data->dev_private;
1993
1994         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1995
1996         dev_info->pci_dev = dev->device ? RTE_ETH_DEV_TO_PCI(dev) : NULL;
1997         dev_info->max_rx_queues =
1998                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1999         dev_info->max_tx_queues =
2000                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
2001         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
2002         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
2003         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
2004         dev_info->default_txconf = (struct rte_eth_txconf) {
2005                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
2006         };
2007
2008         host_features = VTPCI_OPS(hw)->get_features(hw);
2009         dev_info->rx_offload_capa = 0;
2010         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
2011                 dev_info->rx_offload_capa |=
2012                         DEV_RX_OFFLOAD_TCP_CKSUM |
2013                         DEV_RX_OFFLOAD_UDP_CKSUM;
2014         }
2015         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
2016                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
2017         if ((host_features & tso_mask) == tso_mask)
2018                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
2019
2020         dev_info->tx_offload_capa = 0;
2021         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
2022                 dev_info->tx_offload_capa |=
2023                         DEV_TX_OFFLOAD_UDP_CKSUM |
2024                         DEV_TX_OFFLOAD_TCP_CKSUM;
2025         }
2026         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
2027                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
2028         if ((hw->guest_features & tso_mask) == tso_mask)
2029                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
2030 }
2031
2032 /*
2033  * It enables testpmd to collect per queue stats.
2034  */
2035 static int
2036 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
2037 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
2038 __rte_unused uint8_t is_rx)
2039 {
2040         return 0;
2041 }
2042
2043 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
2044 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
2045 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");