drivers/net/virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdint.h>
  35 #include <string.h>
  36 #include <stdio.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39
  40 #include <rte_ethdev.h>
  41 #include <rte_memcpy.h>
  42 #include <rte_string_fns.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_atomic.h>
  46 #include <rte_branch_prediction.h>
  47 #include <rte_pci.h>
  48 #include <rte_ether.h>
  49 #include <rte_common.h>
  50 #include <rte_errno.h>
  51
  52 #include <rte_memory.h>
  53 #include <rte_eal.h>
  54 #include <rte_dev.h>
  55
  56 #include "virtio_ethdev.h"
  57 #include "virtio_pci.h"
  58 #include "virtio_logs.h"
  59 #include "virtqueue.h"
  60 #include "virtio_rxtx.h"
  61
  62 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  63 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  64 static int  virtio_dev_start(struct rte_eth_dev *dev);
  65 static void virtio_dev_stop(struct rte_eth_dev *dev);
  66 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  67 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  68 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  69 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  70 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  71                                 struct rte_eth_dev_info *dev_info);
  72 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  73         __rte_unused int wait_to_complete);
  74
  75 static void virtio_set_hwaddr(struct virtio_hw *hw);
  76 static void virtio_get_hwaddr(struct virtio_hw *hw);
  77
  78 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  79                                  struct rte_eth_stats *stats);
  80 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  81                                  struct rte_eth_xstat *xstats, unsigned n);
  82 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  83                                        struct rte_eth_xstat_name *xstats_names,
  84                                        unsigned limit);
  85 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  86 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  87 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  88                                 uint16_t vlan_id, int on);
  89 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  90                                 struct ether_addr *mac_addr,
  91                                 uint32_t index, uint32_t vmdq __rte_unused);
  92 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  93 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  94                                 struct ether_addr *mac_addr);
  95
  96 static int virtio_dev_queue_stats_mapping_set(
  97         __rte_unused struct rte_eth_dev *eth_dev,
  98         __rte_unused uint16_t queue_id,
  99         __rte_unused uint8_t stat_idx,
 100         __rte_unused uint8_t is_rx);
 101
 102 /*
 103  * The set of PCI devices this driver supports
 104  */
 105 static const struct rte_pci_id pci_id_virtio_map[] = {
 106         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
 107         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 108         { .vendor_id = 0, /* sentinel */ },
 109 };
 110
 111 struct rte_virtio_xstats_name_off {
 112         char name[RTE_ETH_XSTATS_NAME_SIZE];
 113         unsigned offset;
 114 };
 115
 116 /* [rt]x_qX_ is prepended to the name string here */
 117 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 118         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 119         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 120         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 121         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 122         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 123         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 124         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 125         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 126         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 127         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 128         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 129         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 130         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 131 };
 132
 133 /* [rt]x_qX_ is prepended to the name string here */
 134 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 135         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 136         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 137         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 138         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 139         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 140         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 141         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 142         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 143         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 144         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 145         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 146         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 147         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 148 };
 149
 150 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 151                             sizeof(rte_virtio_rxq_stat_strings[0]))
 152 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 153                             sizeof(rte_virtio_txq_stat_strings[0]))
 154
 155 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 156
 157 static int
 158 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 159                 int *dlen, int pkt_num)
 160 {
 161         uint32_t head, i;
 162         int k, sum = 0;
 163         virtio_net_ctrl_ack status = ~0;
 164         struct virtio_pmd_ctrl result;
 165         struct virtqueue *vq;
 166
 167         ctrl->status = status;
 168
 169         if (!cvq || !cvq->vq) {
 170                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 171                 return -1;
 172         }
 173         vq = cvq->vq;
 174         head = vq->vq_desc_head_idx;
 175
 176         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 177                 "vq->hw->cvq = %p vq = %p",
 178                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 179
 180         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 181                 return -1;
 182
 183         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 184                 sizeof(struct virtio_pmd_ctrl));
 185
 186         /*
 187          * Format is enforced in qemu code:
 188          * One TX packet for header;
 189          * At least one TX packet per argument;
 190          * One RX packet for ACK.
 191          */
 192         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 193         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 194         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 195         vq->vq_free_cnt--;
 196         i = vq->vq_ring.desc[head].next;
 197
 198         for (k = 0; k < pkt_num; k++) {
 199                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 200                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 201                         + sizeof(struct virtio_net_ctrl_hdr)
 202                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 203                 vq->vq_ring.desc[i].len = dlen[k];
 204                 sum += dlen[k];
 205                 vq->vq_free_cnt--;
 206                 i = vq->vq_ring.desc[i].next;
 207         }
 208
 209         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 210         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 211                         + sizeof(struct virtio_net_ctrl_hdr);
 212         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 213         vq->vq_free_cnt--;
 214
 215         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 216
 217         vq_update_avail_ring(vq, head);
 218         vq_update_avail_idx(vq);
 219
 220         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 221
 222         virtqueue_notify(vq);
 223
 224         rte_rmb();
 225         while (VIRTQUEUE_NUSED(vq) == 0) {
 226                 rte_rmb();
 227                 usleep(100);
 228         }
 229
 230         while (VIRTQUEUE_NUSED(vq)) {
 231                 uint32_t idx, desc_idx, used_idx;
 232                 struct vring_used_elem *uep;
 233
 234                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 235                                 & (vq->vq_nentries - 1));
 236                 uep = &vq->vq_ring.used->ring[used_idx];
 237                 idx = (uint32_t) uep->id;
 238                 desc_idx = idx;
 239
 240                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 241                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 242                         vq->vq_free_cnt++;
 243                 }
 244
 245                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 246                 vq->vq_desc_head_idx = idx;
 247
 248                 vq->vq_used_cons_idx++;
 249                 vq->vq_free_cnt++;
 250         }
 251
 252         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 253                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 254
 255         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
 256                         sizeof(struct virtio_pmd_ctrl));
 257
 258         return result.status;
 259 }
 260
 261 static int
 262 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 263 {
 264         struct virtio_hw *hw = dev->data->dev_private;
 265         struct virtio_pmd_ctrl ctrl;
 266         int dlen[1];
 267         int ret;
 268
 269         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 270         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 271         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 272
 273         dlen[0] = sizeof(uint16_t);
 274
 275         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 276         if (ret) {
 277                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 278                           "failed, this is too late now...");
 279                 return -EINVAL;
 280         }
 281
 282         return 0;
 283 }
 284
 285 static void
 286 virtio_dev_queue_release(void *queue __rte_unused)
 287 {
 288         /* do nothing */
 289 }
 290
 291 static int
 292 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
 293 {
 294         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
 295                 return VTNET_CQ;
 296         else if (vtpci_queue_idx % 2 == 0)
 297                 return VTNET_RQ;
 298         else
 299                 return VTNET_TQ;
 300 }
 301
 302 static uint16_t
 303 virtio_get_nr_vq(struct virtio_hw *hw)
 304 {
 305         uint16_t nr_vq = hw->max_queue_pairs * 2;
 306
 307         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 308                 nr_vq += 1;
 309
 310         return nr_vq;
 311 }
 312
 313 static void
 314 virtio_init_vring(struct virtqueue *vq)
 315 {
 316         int size = vq->vq_nentries;
 317         struct vring *vr = &vq->vq_ring;
 318         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 319
 320         PMD_INIT_FUNC_TRACE();
 321
 322         /*
 323          * Reinitialise since virtio port might have been stopped and restarted
 324          */
 325         memset(ring_mem, 0, vq->vq_ring_size);
 326         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 327         vq->vq_used_cons_idx = 0;
 328         vq->vq_desc_head_idx = 0;
 329         vq->vq_avail_idx = 0;
 330         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 331         vq->vq_free_cnt = vq->vq_nentries;
 332         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 333
 334         vring_desc_init(vr->desc, size);
 335
 336         /*
 337          * Disable device(host) interrupting guest
 338          */
 339         virtqueue_disable_intr(vq);
 340 }
 341
 342 static int
 343 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 344 {
 345         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 346         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 347         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 348         unsigned int vq_size, size;
 349         struct virtio_hw *hw = dev->data->dev_private;
 350         struct virtnet_rx *rxvq = NULL;
 351         struct virtnet_tx *txvq = NULL;
 352         struct virtnet_ctl *cvq = NULL;
 353         struct virtqueue *vq;
 354         size_t sz_hdr_mz = 0;
 355         void *sw_ring = NULL;
 356         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 357         int ret;
 358
 359         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 360
 361         /*
 362          * Read the virtqueue size from the Queue Size field
 363          * Always power of 2 and if 0 virtqueue does not exist
 364          */
 365         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 366         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 367         if (vq_size == 0) {
 368                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 369                 return -EINVAL;
 370         }
 371
 372         if (!rte_is_power_of_2(vq_size)) {
 373                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 374                 return -EINVAL;
 375         }
 376
 377         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 378                  dev->data->port_id, vtpci_queue_idx);
 379
 380         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 381                                 vq_size * sizeof(struct vq_desc_extra),
 382                                 RTE_CACHE_LINE_SIZE);
 383         if (queue_type == VTNET_TQ) {
 384                 /*
 385                  * For each xmit packet, allocate a virtio_net_hdr
 386                  * and indirect ring elements
 387                  */
 388                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 389         } else if (queue_type == VTNET_CQ) {
 390                 /* Allocate a page for control vq command, data and status */
 391                 sz_hdr_mz = PAGE_SIZE;
 392         }
 393
 394         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 395                                 SOCKET_ID_ANY);
 396         if (vq == NULL) {
 397                 PMD_INIT_LOG(ERR, "can not allocate vq");
 398                 return -ENOMEM;
 399         }
 400         hw->vqs[vtpci_queue_idx] = vq;
 401
 402         vq->hw = hw;
 403         vq->vq_queue_index = vtpci_queue_idx;
 404         vq->vq_nentries = vq_size;
 405
 406         /*
 407          * Reserve a memzone for vring elements
 408          */
 409         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 410         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 411         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 412                      size, vq->vq_ring_size);
 413
 414         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 415                                          SOCKET_ID_ANY,
 416                                          0, VIRTIO_PCI_VRING_ALIGN);
 417         if (mz == NULL) {
 418                 if (rte_errno == EEXIST)
 419                         mz = rte_memzone_lookup(vq_name);
 420                 if (mz == NULL) {
 421                         ret = -ENOMEM;
 422                         goto fail_q_alloc;
 423                 }
 424         }
 425
 426         memset(mz->addr, 0, sizeof(mz->len));
 427
 428         vq->vq_ring_mem = mz->phys_addr;
 429         vq->vq_ring_virt_mem = mz->addr;
 430         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 431                      (uint64_t)mz->phys_addr);
 432         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 433                      (uint64_t)(uintptr_t)mz->addr);
 434
 435         virtio_init_vring(vq);
 436
 437         if (sz_hdr_mz) {
 438                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 439                          dev->data->port_id, vtpci_queue_idx);
 440                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 441                                                      SOCKET_ID_ANY, 0,
 442                                                      RTE_CACHE_LINE_SIZE);
 443                 if (hdr_mz == NULL) {
 444                         if (rte_errno == EEXIST)
 445                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 446                         if (hdr_mz == NULL) {
 447                                 ret = -ENOMEM;
 448                                 goto fail_q_alloc;
 449                         }
 450                 }
 451         }
 452
 453         if (queue_type == VTNET_RQ) {
 454                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 455                                sizeof(vq->sw_ring[0]);
 456
 457                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 458                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 459                 if (!sw_ring) {
 460                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 461                         ret = -ENOMEM;
 462                         goto fail_q_alloc;
 463                 }
 464
 465                 vq->sw_ring = sw_ring;
 466                 rxvq = &vq->rxq;
 467                 rxvq->vq = vq;
 468                 rxvq->port_id = dev->data->port_id;
 469                 rxvq->mz = mz;
 470         } else if (queue_type == VTNET_TQ) {
 471                 txvq = &vq->txq;
 472                 txvq->vq = vq;
 473                 txvq->port_id = dev->data->port_id;
 474                 txvq->mz = mz;
 475                 txvq->virtio_net_hdr_mz = hdr_mz;
 476                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 477         } else if (queue_type == VTNET_CQ) {
 478                 cvq = &vq->cq;
 479                 cvq->vq = vq;
 480                 cvq->mz = mz;
 481                 cvq->virtio_net_hdr_mz = hdr_mz;
 482                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 483                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 484
 485                 hw->cvq = cvq;
 486         }
 487
 488         /* For virtio_user case (that is when dev->pci_dev is NULL), we use
 489          * virtual address. And we need properly set _offset_, please see
 490          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 491          */
 492         if (dev->pci_dev)
 493                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 494         else {
 495                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 496                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 497                 if (queue_type == VTNET_TQ)
 498                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 499                 else if (queue_type == VTNET_CQ)
 500                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 501         }
 502
 503         if (queue_type == VTNET_TQ) {
 504                 struct virtio_tx_region *txr;
 505                 unsigned int i;
 506
 507                 txr = hdr_mz->addr;
 508                 memset(txr, 0, vq_size * sizeof(*txr));
 509                 for (i = 0; i < vq_size; i++) {
 510                         struct vring_desc *start_dp = txr[i].tx_indir;
 511
 512                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 513
 514                         /* first indirect descriptor is always the tx header */
 515                         start_dp->addr = txvq->virtio_net_hdr_mem
 516                                 + i * sizeof(*txr)
 517                                 + offsetof(struct virtio_tx_region, tx_hdr);
 518
 519                         start_dp->len = hw->vtnet_hdr_size;
 520                         start_dp->flags = VRING_DESC_F_NEXT;
 521                 }
 522         }
 523
 524         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 525                 PMD_INIT_LOG(ERR, "setup_queue failed");
 526                 return -EINVAL;
 527         }
 528
 529         return 0;
 530
 531 fail_q_alloc:
 532         rte_free(sw_ring);
 533         rte_memzone_free(hdr_mz);
 534         rte_memzone_free(mz);
 535         rte_free(vq);
 536
 537         return ret;
 538 }
 539
 540 static void
 541 virtio_free_queues(struct virtio_hw *hw)
 542 {
 543         uint16_t nr_vq = virtio_get_nr_vq(hw);
 544         struct virtqueue *vq;
 545         int queue_type;
 546         uint16_t i;
 547
 548         for (i = 0; i < nr_vq; i++) {
 549                 vq = hw->vqs[i];
 550                 if (!vq)
 551                         continue;
 552
 553                 queue_type = virtio_get_queue_type(hw, i);
 554                 if (queue_type == VTNET_RQ) {
 555                         rte_free(vq->sw_ring);
 556                         rte_memzone_free(vq->rxq.mz);
 557                 } else if (queue_type == VTNET_TQ) {
 558                         rte_memzone_free(vq->txq.mz);
 559                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 560                 } else {
 561                         rte_memzone_free(vq->cq.mz);
 562                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 563                 }
 564
 565                 rte_free(vq);
 566         }
 567
 568         rte_free(hw->vqs);
 569 }
 570
 571 static int
 572 virtio_alloc_queues(struct rte_eth_dev *dev)
 573 {
 574         struct virtio_hw *hw = dev->data->dev_private;
 575         uint16_t nr_vq = virtio_get_nr_vq(hw);
 576         uint16_t i;
 577         int ret;
 578
 579         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 580         if (!hw->vqs) {
 581                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 582                 return -ENOMEM;
 583         }
 584
 585         for (i = 0; i < nr_vq; i++) {
 586                 ret = virtio_init_queue(dev, i);
 587                 if (ret < 0) {
 588                         virtio_free_queues(hw);
 589                         return ret;
 590                 }
 591         }
 592
 593         return 0;
 594 }
 595
 596 static void
 597 virtio_dev_close(struct rte_eth_dev *dev)
 598 {
 599         struct virtio_hw *hw = dev->data->dev_private;
 600
 601         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 602
 603         /* reset the NIC */
 604         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 605                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 606         vtpci_reset(hw);
 607         virtio_dev_free_mbufs(dev);
 608         virtio_free_queues(hw);
 609 }
 610
 611 static void
 612 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 613 {
 614         struct virtio_hw *hw = dev->data->dev_private;
 615         struct virtio_pmd_ctrl ctrl;
 616         int dlen[1];
 617         int ret;
 618
 619         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 620                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 621                 return;
 622         }
 623
 624         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 625         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 626         ctrl.data[0] = 1;
 627         dlen[0] = 1;
 628
 629         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 630         if (ret)
 631                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 632 }
 633
 634 static void
 635 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 636 {
 637         struct virtio_hw *hw = dev->data->dev_private;
 638         struct virtio_pmd_ctrl ctrl;
 639         int dlen[1];
 640         int ret;
 641
 642         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 643                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 644                 return;
 645         }
 646
 647         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 648         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 649         ctrl.data[0] = 0;
 650         dlen[0] = 1;
 651
 652         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 653         if (ret)
 654                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 655 }
 656
 657 static void
 658 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 659 {
 660         struct virtio_hw *hw = dev->data->dev_private;
 661         struct virtio_pmd_ctrl ctrl;
 662         int dlen[1];
 663         int ret;
 664
 665         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 666                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 667                 return;
 668         }
 669
 670         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 671         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 672         ctrl.data[0] = 1;
 673         dlen[0] = 1;
 674
 675         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 676         if (ret)
 677                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 678 }
 679
 680 static void
 681 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 682 {
 683         struct virtio_hw *hw = dev->data->dev_private;
 684         struct virtio_pmd_ctrl ctrl;
 685         int dlen[1];
 686         int ret;
 687
 688         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 689                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 690                 return;
 691         }
 692
 693         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 694         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 695         ctrl.data[0] = 0;
 696         dlen[0] = 1;
 697
 698         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 699         if (ret)
 700                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 701 }
 702
 703 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 704 static int
 705 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 706 {
 707         struct virtio_hw *hw = dev->data->dev_private;
 708         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 709                                  hw->vtnet_hdr_size;
 710         uint32_t frame_size = mtu + ether_hdr_len;
 711
 712         if (mtu < ETHER_MIN_MTU || frame_size > VIRTIO_MAX_RX_PKTLEN) {
 713                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d\n",
 714                         ETHER_MIN_MTU, VIRTIO_MAX_RX_PKTLEN - ether_hdr_len);
 715                 return -EINVAL;
 716         }
 717         return 0;
 718 }
 719
 720 /*
 721  * dev_ops for virtio, bare necessities for basic operation
 722  */
 723 static const struct eth_dev_ops virtio_eth_dev_ops = {
 724         .dev_configure           = virtio_dev_configure,
 725         .dev_start               = virtio_dev_start,
 726         .dev_stop                = virtio_dev_stop,
 727         .dev_close               = virtio_dev_close,
 728         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 729         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 730         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 731         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 732         .mtu_set                 = virtio_mtu_set,
 733         .dev_infos_get           = virtio_dev_info_get,
 734         .stats_get               = virtio_dev_stats_get,
 735         .xstats_get              = virtio_dev_xstats_get,
 736         .xstats_get_names        = virtio_dev_xstats_get_names,
 737         .stats_reset             = virtio_dev_stats_reset,
 738         .xstats_reset            = virtio_dev_stats_reset,
 739         .link_update             = virtio_dev_link_update,
 740         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 741         .rx_queue_release        = virtio_dev_queue_release,
 742         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 743         .tx_queue_release        = virtio_dev_queue_release,
 744         /* collect stats per queue */
 745         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 746         .vlan_filter_set         = virtio_vlan_filter_set,
 747         .mac_addr_add            = virtio_mac_addr_add,
 748         .mac_addr_remove         = virtio_mac_addr_remove,
 749         .mac_addr_set            = virtio_mac_addr_set,
 750 };
 751
 752 static inline int
 753 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 754                                 struct rte_eth_link *link)
 755 {
 756         struct rte_eth_link *dst = link;
 757         struct rte_eth_link *src = &(dev->data->dev_link);
 758
 759         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 760                         *(uint64_t *)src) == 0)
 761                 return -1;
 762
 763         return 0;
 764 }
 765
 766 /**
 767  * Atomically writes the link status information into global
 768  * structure rte_eth_dev.
 769  *
 770  * @param dev
 771  *   - Pointer to the structure rte_eth_dev to read from.
 772  *   - Pointer to the buffer to be saved with the link status.
 773  *
 774  * @return
 775  *   - On success, zero.
 776  *   - On failure, negative value.
 777  */
 778 static inline int
 779 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 780                 struct rte_eth_link *link)
 781 {
 782         struct rte_eth_link *dst = &(dev->data->dev_link);
 783         struct rte_eth_link *src = link;
 784
 785         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 786                                         *(uint64_t *)src) == 0)
 787                 return -1;
 788
 789         return 0;
 790 }
 791
 792 static void
 793 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 794 {
 795         unsigned i;
 796
 797         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 798                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 799                 if (txvq == NULL)
 800                         continue;
 801
 802                 stats->opackets += txvq->stats.packets;
 803                 stats->obytes += txvq->stats.bytes;
 804                 stats->oerrors += txvq->stats.errors;
 805
 806                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 807                         stats->q_opackets[i] = txvq->stats.packets;
 808                         stats->q_obytes[i] = txvq->stats.bytes;
 809                 }
 810         }
 811
 812         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 813                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 814                 if (rxvq == NULL)
 815                         continue;
 816
 817                 stats->ipackets += rxvq->stats.packets;
 818                 stats->ibytes += rxvq->stats.bytes;
 819                 stats->ierrors += rxvq->stats.errors;
 820
 821                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 822                         stats->q_ipackets[i] = rxvq->stats.packets;
 823                         stats->q_ibytes[i] = rxvq->stats.bytes;
 824                 }
 825         }
 826
 827         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 828 }
 829
 830 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 831                                        struct rte_eth_xstat_name *xstats_names,
 832                                        __rte_unused unsigned limit)
 833 {
 834         unsigned i;
 835         unsigned count = 0;
 836         unsigned t;
 837
 838         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 839                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 840
 841         if (xstats_names != NULL) {
 842                 /* Note: limit checked in rte_eth_xstats_names() */
 843
 844                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 845                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 846                         if (rxvq == NULL)
 847                                 continue;
 848                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 849                                 snprintf(xstats_names[count].name,
 850                                         sizeof(xstats_names[count].name),
 851                                         "rx_q%u_%s", i,
 852                                         rte_virtio_rxq_stat_strings[t].name);
 853                                 count++;
 854                         }
 855                 }
 856
 857                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 858                         struct virtqueue *txvq = dev->data->tx_queues[i];
 859                         if (txvq == NULL)
 860                                 continue;
 861                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 862                                 snprintf(xstats_names[count].name,
 863                                         sizeof(xstats_names[count].name),
 864                                         "tx_q%u_%s", i,
 865                                         rte_virtio_txq_stat_strings[t].name);
 866                                 count++;
 867                         }
 868                 }
 869                 return count;
 870         }
 871         return nstats;
 872 }
 873
 874 static int
 875 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 876                       unsigned n)
 877 {
 878         unsigned i;
 879         unsigned count = 0;
 880
 881         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 882                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 883
 884         if (n < nstats)
 885                 return nstats;
 886
 887         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 888                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 889
 890                 if (rxvq == NULL)
 891                         continue;
 892
 893                 unsigned t;
 894
 895                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 896                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 897                                 rte_virtio_rxq_stat_strings[t].offset);
 898                         xstats[count].id = count;
 899                         count++;
 900                 }
 901         }
 902
 903         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 904                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 905
 906                 if (txvq == NULL)
 907                         continue;
 908
 909                 unsigned t;
 910
 911                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 912                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 913                                 rte_virtio_txq_stat_strings[t].offset);
 914                         xstats[count].id = count;
 915                         count++;
 916                 }
 917         }
 918
 919         return count;
 920 }
 921
 922 static void
 923 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 924 {
 925         virtio_update_stats(dev, stats);
 926 }
 927
 928 static void
 929 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 930 {
 931         unsigned int i;
 932
 933         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 934                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 935                 if (txvq == NULL)
 936                         continue;
 937
 938                 txvq->stats.packets = 0;
 939                 txvq->stats.bytes = 0;
 940                 txvq->stats.errors = 0;
 941                 txvq->stats.multicast = 0;
 942                 txvq->stats.broadcast = 0;
 943                 memset(txvq->stats.size_bins, 0,
 944                        sizeof(txvq->stats.size_bins[0]) * 8);
 945         }
 946
 947         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 948                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 949                 if (rxvq == NULL)
 950                         continue;
 951
 952                 rxvq->stats.packets = 0;
 953                 rxvq->stats.bytes = 0;
 954                 rxvq->stats.errors = 0;
 955                 rxvq->stats.multicast = 0;
 956                 rxvq->stats.broadcast = 0;
 957                 memset(rxvq->stats.size_bins, 0,
 958                        sizeof(rxvq->stats.size_bins[0]) * 8);
 959         }
 960 }
 961
 962 static void
 963 virtio_set_hwaddr(struct virtio_hw *hw)
 964 {
 965         vtpci_write_dev_config(hw,
 966                         offsetof(struct virtio_net_config, mac),
 967                         &hw->mac_addr, ETHER_ADDR_LEN);
 968 }
 969
 970 static void
 971 virtio_get_hwaddr(struct virtio_hw *hw)
 972 {
 973         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 974                 vtpci_read_dev_config(hw,
 975                         offsetof(struct virtio_net_config, mac),
 976                         &hw->mac_addr, ETHER_ADDR_LEN);
 977         } else {
 978                 eth_random_addr(&hw->mac_addr[0]);
 979                 virtio_set_hwaddr(hw);
 980         }
 981 }
 982
 983 static void
 984 virtio_mac_table_set(struct virtio_hw *hw,
 985                      const struct virtio_net_ctrl_mac *uc,
 986                      const struct virtio_net_ctrl_mac *mc)
 987 {
 988         struct virtio_pmd_ctrl ctrl;
 989         int err, len[2];
 990
 991         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 992                 PMD_DRV_LOG(INFO, "host does not support mac table");
 993                 return;
 994         }
 995
 996         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 997         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 998
 999         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1000         memcpy(ctrl.data, uc, len[0]);
1001
1002         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1003         memcpy(ctrl.data + len[0], mc, len[1]);
1004
1005         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1006         if (err != 0)
1007                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1008 }
1009
1010 static void
1011 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1012                     uint32_t index, uint32_t vmdq __rte_unused)
1013 {
1014         struct virtio_hw *hw = dev->data->dev_private;
1015         const struct ether_addr *addrs = dev->data->mac_addrs;
1016         unsigned int i;
1017         struct virtio_net_ctrl_mac *uc, *mc;
1018
1019         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1020                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1021                 return;
1022         }
1023
1024         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1025         uc->entries = 0;
1026         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1027         mc->entries = 0;
1028
1029         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1030                 const struct ether_addr *addr
1031                         = (i == index) ? mac_addr : addrs + i;
1032                 struct virtio_net_ctrl_mac *tbl
1033                         = is_multicast_ether_addr(addr) ? mc : uc;
1034
1035                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1036         }
1037
1038         virtio_mac_table_set(hw, uc, mc);
1039 }
1040
1041 static void
1042 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1043 {
1044         struct virtio_hw *hw = dev->data->dev_private;
1045         struct ether_addr *addrs = dev->data->mac_addrs;
1046         struct virtio_net_ctrl_mac *uc, *mc;
1047         unsigned int i;
1048
1049         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1050                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1051                 return;
1052         }
1053
1054         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1055         uc->entries = 0;
1056         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1057         mc->entries = 0;
1058
1059         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1060                 struct virtio_net_ctrl_mac *tbl;
1061
1062                 if (i == index || is_zero_ether_addr(addrs + i))
1063                         continue;
1064
1065                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1066                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1067         }
1068
1069         virtio_mac_table_set(hw, uc, mc);
1070 }
1071
1072 static void
1073 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1074 {
1075         struct virtio_hw *hw = dev->data->dev_private;
1076
1077         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1078
1079         /* Use atomic update if available */
1080         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1081                 struct virtio_pmd_ctrl ctrl;
1082                 int len = ETHER_ADDR_LEN;
1083
1084                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1085                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1086
1087                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1088                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1089         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1090                 virtio_set_hwaddr(hw);
1091 }
1092
1093 static int
1094 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1095 {
1096         struct virtio_hw *hw = dev->data->dev_private;
1097         struct virtio_pmd_ctrl ctrl;
1098         int len;
1099
1100         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1101                 return -ENOTSUP;
1102
1103         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1104         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1105         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1106         len = sizeof(vlan_id);
1107
1108         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1109 }
1110
1111 static int
1112 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1113 {
1114         uint64_t host_features;
1115
1116         /* Prepare guest_features: feature that driver wants to support */
1117         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1118                 req_features);
1119
1120         /* Read device(host) feature bits */
1121         host_features = VTPCI_OPS(hw)->get_features(hw);
1122         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1123                 host_features);
1124
1125         /*
1126          * Negotiate features: Subset of device feature bits are written back
1127          * guest feature bits.
1128          */
1129         hw->guest_features = req_features;
1130         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1131         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1132                 hw->guest_features);
1133
1134         if (hw->modern) {
1135                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1136                         PMD_INIT_LOG(ERR,
1137                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1138                         return -1;
1139                 }
1140                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1141                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1142                         PMD_INIT_LOG(ERR,
1143                                 "failed to set FEATURES_OK status!");
1144                         return -1;
1145                 }
1146         }
1147
1148         hw->req_guest_features = req_features;
1149
1150         return 0;
1151 }
1152
1153 /*
1154  * Process Virtio Config changed interrupt and call the callback
1155  * if link state changed.
1156  */
1157 static void
1158 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1159                          void *param)
1160 {
1161         struct rte_eth_dev *dev = param;
1162         struct virtio_hw *hw = dev->data->dev_private;
1163         uint8_t isr;
1164
1165         /* Read interrupt status which clears interrupt */
1166         isr = vtpci_isr(hw);
1167         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1168
1169         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1170                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1171
1172         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1173                 if (virtio_dev_link_update(dev, 0) == 0)
1174                         _rte_eth_dev_callback_process(dev,
1175                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1176         }
1177
1178 }
1179
1180 static void
1181 rx_func_get(struct rte_eth_dev *eth_dev)
1182 {
1183         struct virtio_hw *hw = eth_dev->data->dev_private;
1184         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1185                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1186         else
1187                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1188 }
1189
1190 /* reset device and renegotiate features if needed */
1191 static int
1192 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1193 {
1194         struct virtio_hw *hw = eth_dev->data->dev_private;
1195         struct virtio_net_config *config;
1196         struct virtio_net_config local_config;
1197         struct rte_pci_device *pci_dev = eth_dev->pci_dev;
1198         int ret;
1199
1200         /* Reset the device although not necessary at startup */
1201         vtpci_reset(hw);
1202
1203         /* Tell the host we've noticed this device. */
1204         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1205
1206         /* Tell the host we've known how to drive the device. */
1207         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1208         if (virtio_negotiate_features(hw, req_features) < 0)
1209                 return -1;
1210
1211         rte_eth_copy_pci_info(eth_dev, pci_dev);
1212
1213         /* If host does not support status then disable LSC */
1214         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1215                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1216         else
1217                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1218
1219         rx_func_get(eth_dev);
1220
1221         /* Setting up rx_header size for the device */
1222         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1223             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1224                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1225         else
1226                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1227
1228         /* Copy the permanent MAC address to: virtio_hw */
1229         virtio_get_hwaddr(hw);
1230         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1231                         &eth_dev->data->mac_addrs[0]);
1232         PMD_INIT_LOG(DEBUG,
1233                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1234                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1235                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1236
1237         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1238                 config = &local_config;
1239
1240                 vtpci_read_dev_config(hw,
1241                         offsetof(struct virtio_net_config, mac),
1242                         &config->mac, sizeof(config->mac));
1243
1244                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1245                         vtpci_read_dev_config(hw,
1246                                 offsetof(struct virtio_net_config, status),
1247                                 &config->status, sizeof(config->status));
1248                 } else {
1249                         PMD_INIT_LOG(DEBUG,
1250                                      "VIRTIO_NET_F_STATUS is not supported");
1251                         config->status = 0;
1252                 }
1253
1254                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1255                         vtpci_read_dev_config(hw,
1256                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1257                                 &config->max_virtqueue_pairs,
1258                                 sizeof(config->max_virtqueue_pairs));
1259                 } else {
1260                         PMD_INIT_LOG(DEBUG,
1261                                      "VIRTIO_NET_F_MQ is not supported");
1262                         config->max_virtqueue_pairs = 1;
1263                 }
1264
1265                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1266
1267                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1268                                 config->max_virtqueue_pairs);
1269                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1270                 PMD_INIT_LOG(DEBUG,
1271                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1272                                 config->mac[0], config->mac[1],
1273                                 config->mac[2], config->mac[3],
1274                                 config->mac[4], config->mac[5]);
1275         } else {
1276                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1277                 hw->max_queue_pairs = 1;
1278         }
1279
1280         ret = virtio_alloc_queues(eth_dev);
1281         if (ret < 0)
1282                 return ret;
1283         vtpci_reinit_complete(hw);
1284
1285         if (pci_dev)
1286                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1287                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1288                         pci_dev->id.device_id);
1289
1290         return 0;
1291 }
1292
1293 /*
1294  * Remap the PCI device again (IO port map for legacy device and
1295  * memory map for modern device), so that the secondary process
1296  * could have the PCI initiated correctly.
1297  */
1298 static int
1299 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1300 {
1301         if (hw->modern) {
1302                 /*
1303                  * We don't have to re-parse the PCI config space, since
1304                  * rte_eal_pci_map_device() makes sure the mapped address
1305                  * in secondary process would equal to the one mapped in
1306                  * the primary process: error will be returned if that
1307                  * requirement is not met.
1308                  *
1309                  * That said, we could simply reuse all cap pointers
1310                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1311                  * primary process, which is stored in shared memory.
1312                  */
1313                 if (rte_eal_pci_map_device(pci_dev)) {
1314                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1315                         return -1;
1316                 }
1317         } else {
1318                 if (rte_eal_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1319                         return -1;
1320         }
1321
1322         return 0;
1323 }
1324
1325 static void
1326 virtio_set_vtpci_ops(struct virtio_hw *hw)
1327 {
1328 #ifdef RTE_VIRTIO_USER
1329         if (hw->virtio_user_dev)
1330                 VTPCI_OPS(hw) = &virtio_user_ops;
1331         else
1332 #endif
1333         if (hw->modern)
1334                 VTPCI_OPS(hw) = &modern_ops;
1335         else
1336                 VTPCI_OPS(hw) = &legacy_ops;
1337 }
1338
1339 /*
1340  * This function is based on probe() function in virtio_pci.c
1341  * It returns 0 on success.
1342  */
1343 int
1344 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1345 {
1346         struct virtio_hw *hw = eth_dev->data->dev_private;
1347         struct rte_pci_device *pci_dev;
1348         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1349         int ret;
1350
1351         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1352
1353         eth_dev->dev_ops = &virtio_eth_dev_ops;
1354         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1355
1356         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1357                 if (!hw->virtio_user_dev) {
1358                         ret = virtio_remap_pci(eth_dev->pci_dev, hw);
1359                         if (ret)
1360                                 return ret;
1361                 }
1362
1363                 virtio_set_vtpci_ops(hw);
1364                 if (hw->use_simple_rxtx) {
1365                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1366                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1367                 } else {
1368                         rx_func_get(eth_dev);
1369                 }
1370                 return 0;
1371         }
1372
1373         /* Allocate memory for storing MAC addresses */
1374         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1375         if (eth_dev->data->mac_addrs == NULL) {
1376                 PMD_INIT_LOG(ERR,
1377                         "Failed to allocate %d bytes needed to store MAC addresses",
1378                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1379                 return -ENOMEM;
1380         }
1381
1382         pci_dev = eth_dev->pci_dev;
1383         hw->port_id = eth_dev->data->port_id;
1384
1385         if (pci_dev) {
1386                 ret = vtpci_init(pci_dev, hw, &dev_flags);
1387                 if (ret)
1388                         return ret;
1389         }
1390
1391         eth_dev->data->dev_flags = dev_flags;
1392
1393         /* reset device and negotiate default features */
1394         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1395         if (ret < 0)
1396                 return ret;
1397
1398         /* Setup interrupt callback  */
1399         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1400                 rte_intr_callback_register(&pci_dev->intr_handle,
1401                         virtio_interrupt_handler, eth_dev);
1402
1403         return 0;
1404 }
1405
1406 static int
1407 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1408 {
1409         struct rte_pci_device *pci_dev;
1410
1411         PMD_INIT_FUNC_TRACE();
1412
1413         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1414                 return -EPERM;
1415
1416         virtio_dev_stop(eth_dev);
1417         virtio_dev_close(eth_dev);
1418         pci_dev = eth_dev->pci_dev;
1419
1420         eth_dev->dev_ops = NULL;
1421         eth_dev->tx_pkt_burst = NULL;
1422         eth_dev->rx_pkt_burst = NULL;
1423
1424         rte_free(eth_dev->data->mac_addrs);
1425         eth_dev->data->mac_addrs = NULL;
1426
1427         /* reset interrupt callback  */
1428         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1429                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1430                                                 virtio_interrupt_handler,
1431                                                 eth_dev);
1432         rte_eal_pci_unmap_device(pci_dev);
1433
1434         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1435
1436         return 0;
1437 }
1438
1439 static struct eth_driver rte_virtio_pmd = {
1440         .pci_drv = {
1441                 .driver = {
1442                         .name = "net_virtio",
1443                 },
1444                 .id_table = pci_id_virtio_map,
1445                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1446                 .probe = rte_eth_dev_pci_probe,
1447                 .remove = rte_eth_dev_pci_remove,
1448         },
1449         .eth_dev_init = eth_virtio_dev_init,
1450         .eth_dev_uninit = eth_virtio_dev_uninit,
1451         .dev_private_size = sizeof(struct virtio_hw),
1452 };
1453
1454 RTE_INIT(rte_virtio_pmd_init);
1455 static void
1456 rte_virtio_pmd_init(void)
1457 {
1458         if (rte_eal_iopl_init() != 0) {
1459                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1460                 return;
1461         }
1462
1463         rte_eal_pci_register(&rte_virtio_pmd.pci_drv);
1464 }
1465
1466 /*
1467  * Configure virtio device
1468  * It returns 0 on success.
1469  */
1470 static int
1471 virtio_dev_configure(struct rte_eth_dev *dev)
1472 {
1473         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1474         struct virtio_hw *hw = dev->data->dev_private;
1475         uint64_t req_features;
1476         int ret;
1477
1478         PMD_INIT_LOG(DEBUG, "configure");
1479         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1480         if (rxmode->hw_ip_checksum)
1481                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1482         if (rxmode->enable_lro)
1483                 req_features |=
1484                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1485                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1486
1487         /* if request features changed, reinit the device */
1488         if (req_features != hw->req_guest_features) {
1489                 ret = virtio_init_device(dev, req_features);
1490                 if (ret < 0)
1491                         return ret;
1492         }
1493
1494         if (rxmode->hw_ip_checksum &&
1495                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1496                 PMD_DRV_LOG(NOTICE,
1497                         "rx ip checksum not available on this host");
1498                 return -ENOTSUP;
1499         }
1500
1501         if (rxmode->enable_lro &&
1502                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1503                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1504                 PMD_DRV_LOG(NOTICE,
1505                         "lro not available on this host");
1506                 return -ENOTSUP;
1507         }
1508
1509         /* start control queue */
1510         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1511                 virtio_dev_cq_start(dev);
1512
1513         hw->vlan_strip = rxmode->hw_vlan_strip;
1514
1515         if (rxmode->hw_vlan_filter
1516             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1517                 PMD_DRV_LOG(NOTICE,
1518                             "vlan filtering not available on this host");
1519                 return -ENOTSUP;
1520         }
1521
1522         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1523                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1524                         PMD_DRV_LOG(ERR, "failed to set config vector");
1525                         return -EBUSY;
1526                 }
1527
1528         return 0;
1529 }
1530
1531
1532 static int
1533 virtio_dev_start(struct rte_eth_dev *dev)
1534 {
1535         uint16_t nb_queues, i;
1536         struct virtnet_rx *rxvq;
1537         struct virtnet_tx *txvq __rte_unused;
1538         struct virtio_hw *hw = dev->data->dev_private;
1539
1540         /* check if lsc interrupt feature is enabled */
1541         if (dev->data->dev_conf.intr_conf.lsc) {
1542                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1543                         PMD_DRV_LOG(ERR, "link status not supported by host");
1544                         return -ENOTSUP;
1545                 }
1546
1547                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1548                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1549                         return -EIO;
1550                 }
1551         }
1552
1553         /* Initialize Link state */
1554         virtio_dev_link_update(dev, 0);
1555
1556         /*Notify the backend
1557          *Otherwise the tap backend might already stop its queue due to fullness.
1558          *vhost backend will have no chance to be waked up
1559          */
1560         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1561         if (hw->max_queue_pairs > 1) {
1562                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1563                         return -EINVAL;
1564         }
1565
1566         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1567
1568         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1569                 rxvq = dev->data->rx_queues[i];
1570                 virtqueue_notify(rxvq->vq);
1571         }
1572
1573         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1574
1575         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1576                 rxvq = dev->data->rx_queues[i];
1577                 VIRTQUEUE_DUMP(rxvq->vq);
1578         }
1579
1580         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1581                 txvq = dev->data->tx_queues[i];
1582                 VIRTQUEUE_DUMP(txvq->vq);
1583         }
1584
1585         return 0;
1586 }
1587
1588 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1589 {
1590         struct rte_mbuf *buf;
1591         int i, mbuf_num = 0;
1592
1593         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1594                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1595
1596                 PMD_INIT_LOG(DEBUG,
1597                              "Before freeing rxq[%d] used and unused buf", i);
1598                 VIRTQUEUE_DUMP(rxvq->vq);
1599
1600                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1601                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1602                         rte_pktmbuf_free(buf);
1603                         mbuf_num++;
1604                 }
1605
1606                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1607                 PMD_INIT_LOG(DEBUG,
1608                              "After freeing rxq[%d] used and unused buf", i);
1609                 VIRTQUEUE_DUMP(rxvq->vq);
1610         }
1611
1612         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1613                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1614
1615                 PMD_INIT_LOG(DEBUG,
1616                              "Before freeing txq[%d] used and unused bufs",
1617                              i);
1618                 VIRTQUEUE_DUMP(txvq->vq);
1619
1620                 mbuf_num = 0;
1621                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1622                         rte_pktmbuf_free(buf);
1623                         mbuf_num++;
1624                 }
1625
1626                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1627                 PMD_INIT_LOG(DEBUG,
1628                              "After freeing txq[%d] used and unused buf", i);
1629                 VIRTQUEUE_DUMP(txvq->vq);
1630         }
1631 }
1632
1633 /*
1634  * Stop device: disable interrupt and mark link down
1635  */
1636 static void
1637 virtio_dev_stop(struct rte_eth_dev *dev)
1638 {
1639         struct rte_eth_link link;
1640
1641         PMD_INIT_LOG(DEBUG, "stop");
1642
1643         if (dev->data->dev_conf.intr_conf.lsc)
1644                 rte_intr_disable(&dev->pci_dev->intr_handle);
1645
1646         memset(&link, 0, sizeof(link));
1647         virtio_dev_atomic_write_link_status(dev, &link);
1648 }
1649
1650 static int
1651 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1652 {
1653         struct rte_eth_link link, old;
1654         uint16_t status;
1655         struct virtio_hw *hw = dev->data->dev_private;
1656         memset(&link, 0, sizeof(link));
1657         virtio_dev_atomic_read_link_status(dev, &link);
1658         old = link;
1659         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1660         link.link_speed  = SPEED_10G;
1661
1662         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1663                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1664                 vtpci_read_dev_config(hw,
1665                                 offsetof(struct virtio_net_config, status),
1666                                 &status, sizeof(status));
1667                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1668                         link.link_status = ETH_LINK_DOWN;
1669                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1670                                      dev->data->port_id);
1671                 } else {
1672                         link.link_status = ETH_LINK_UP;
1673                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1674                                      dev->data->port_id);
1675                 }
1676         } else {
1677                 link.link_status = ETH_LINK_UP;
1678         }
1679         virtio_dev_atomic_write_link_status(dev, &link);
1680
1681         return (old.link_status == link.link_status) ? -1 : 0;
1682 }
1683
1684 static void
1685 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1686 {
1687         uint64_t tso_mask;
1688         struct virtio_hw *hw = dev->data->dev_private;
1689
1690         if (dev->pci_dev)
1691                 dev_info->driver_name = dev->driver->pci_drv.driver.name;
1692         else
1693                 dev_info->driver_name = "virtio_user PMD";
1694         dev_info->max_rx_queues =
1695                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1696         dev_info->max_tx_queues =
1697                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1698         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1699         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1700         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1701         dev_info->default_txconf = (struct rte_eth_txconf) {
1702                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1703         };
1704         dev_info->rx_offload_capa =
1705                 DEV_RX_OFFLOAD_TCP_CKSUM |
1706                 DEV_RX_OFFLOAD_UDP_CKSUM |
1707                 DEV_RX_OFFLOAD_TCP_LRO;
1708         dev_info->tx_offload_capa = 0;
1709
1710         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1711                 dev_info->tx_offload_capa |=
1712                         DEV_TX_OFFLOAD_UDP_CKSUM |
1713                         DEV_TX_OFFLOAD_TCP_CKSUM;
1714         }
1715
1716         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1717                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1718         if ((hw->guest_features & tso_mask) == tso_mask)
1719                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1720 }
1721
1722 /*
1723  * It enables testpmd to collect per queue stats.
1724  */
1725 static int
1726 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1727 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1728 __rte_unused uint8_t is_rx)
1729 {
1730         return 0;
1731 }
1732
1733 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1734 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);