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_ethdev_pci.h>
  42 #include <rte_memcpy.h>
  43 #include <rte_string_fns.h>
  44 #include <rte_memzone.h>
  45 #include <rte_malloc.h>
  46 #include <rte_atomic.h>
  47 #include <rte_branch_prediction.h>
  48 #include <rte_pci.h>
  49 #include <rte_ether.h>
  50 #include <rte_common.h>
  51 #include <rte_errno.h>
  52
  53 #include <rte_memory.h>
  54 #include <rte_eal.h>
  55 #include <rte_dev.h>
  56
  57 #include "virtio_ethdev.h"
  58 #include "virtio_pci.h"
  59 #include "virtio_logs.h"
  60 #include "virtqueue.h"
  61 #include "virtio_rxtx.h"
  62
  63 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  64 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  65 static int  virtio_dev_start(struct rte_eth_dev *dev);
  66 static void virtio_dev_stop(struct rte_eth_dev *dev);
  67 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  68 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  69 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  70 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  71 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  72                                 struct rte_eth_dev_info *dev_info);
  73 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  74         __rte_unused int wait_to_complete);
  75
  76 static void virtio_set_hwaddr(struct virtio_hw *hw);
  77 static void virtio_get_hwaddr(struct virtio_hw *hw);
  78
  79 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  80                                  struct rte_eth_stats *stats);
  81 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  82                                  struct rte_eth_xstat *xstats, unsigned n);
  83 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  84                                        struct rte_eth_xstat_name *xstats_names,
  85                                        unsigned limit);
  86 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  87 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  88 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  89                                 uint16_t vlan_id, int on);
  90 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  91                                 struct ether_addr *mac_addr,
  92                                 uint32_t index, uint32_t vmdq __rte_unused);
  93 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  94 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  95                                 struct ether_addr *mac_addr);
  96
  97 static int virtio_dev_queue_stats_mapping_set(
  98         __rte_unused struct rte_eth_dev *eth_dev,
  99         __rte_unused uint16_t queue_id,
 100         __rte_unused uint8_t stat_idx,
 101         __rte_unused uint8_t is_rx);
 102
 103 /*
 104  * The set of PCI devices this driver supports
 105  */
 106 static const struct rte_pci_id pci_id_virtio_map[] = {
 107         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
 108         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 109         { .vendor_id = 0, /* sentinel */ },
 110 };
 111
 112 struct rte_virtio_xstats_name_off {
 113         char name[RTE_ETH_XSTATS_NAME_SIZE];
 114         unsigned offset;
 115 };
 116
 117 /* [rt]x_qX_ is prepended to the name string here */
 118 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 119         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 120         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 121         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 122         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 123         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 124         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 125         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 126         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 127         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 128         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 129         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 130         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 131         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 132 };
 133
 134 /* [rt]x_qX_ is prepended to the name string here */
 135 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 136         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 137         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 138         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 139         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 140         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 141         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 142         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 143         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 144         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 145         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 146         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 147         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 148         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 149 };
 150
 151 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 152                             sizeof(rte_virtio_rxq_stat_strings[0]))
 153 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 154                             sizeof(rte_virtio_txq_stat_strings[0]))
 155
 156 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 157
 158 static int
 159 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 160                 int *dlen, int pkt_num)
 161 {
 162         uint32_t head, i;
 163         int k, sum = 0;
 164         virtio_net_ctrl_ack status = ~0;
 165         struct virtio_pmd_ctrl result;
 166         struct virtqueue *vq;
 167
 168         ctrl->status = status;
 169
 170         if (!cvq || !cvq->vq) {
 171                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 172                 return -1;
 173         }
 174         vq = cvq->vq;
 175         head = vq->vq_desc_head_idx;
 176
 177         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 178                 "vq->hw->cvq = %p vq = %p",
 179                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 180
 181         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 182                 return -1;
 183
 184         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 185                 sizeof(struct virtio_pmd_ctrl));
 186
 187         /*
 188          * Format is enforced in qemu code:
 189          * One TX packet for header;
 190          * At least one TX packet per argument;
 191          * One RX packet for ACK.
 192          */
 193         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 194         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 195         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 196         vq->vq_free_cnt--;
 197         i = vq->vq_ring.desc[head].next;
 198
 199         for (k = 0; k < pkt_num; k++) {
 200                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 201                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 202                         + sizeof(struct virtio_net_ctrl_hdr)
 203                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 204                 vq->vq_ring.desc[i].len = dlen[k];
 205                 sum += dlen[k];
 206                 vq->vq_free_cnt--;
 207                 i = vq->vq_ring.desc[i].next;
 208         }
 209
 210         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 211         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 212                         + sizeof(struct virtio_net_ctrl_hdr);
 213         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 214         vq->vq_free_cnt--;
 215
 216         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 217
 218         vq_update_avail_ring(vq, head);
 219         vq_update_avail_idx(vq);
 220
 221         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 222
 223         virtqueue_notify(vq);
 224
 225         rte_rmb();
 226         while (VIRTQUEUE_NUSED(vq) == 0) {
 227                 rte_rmb();
 228                 usleep(100);
 229         }
 230
 231         while (VIRTQUEUE_NUSED(vq)) {
 232                 uint32_t idx, desc_idx, used_idx;
 233                 struct vring_used_elem *uep;
 234
 235                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 236                                 & (vq->vq_nentries - 1));
 237                 uep = &vq->vq_ring.used->ring[used_idx];
 238                 idx = (uint32_t) uep->id;
 239                 desc_idx = idx;
 240
 241                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 242                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 243                         vq->vq_free_cnt++;
 244                 }
 245
 246                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 247                 vq->vq_desc_head_idx = idx;
 248
 249                 vq->vq_used_cons_idx++;
 250                 vq->vq_free_cnt++;
 251         }
 252
 253         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 254                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 255
 256         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
 257                         sizeof(struct virtio_pmd_ctrl));
 258
 259         return result.status;
 260 }
 261
 262 static int
 263 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 264 {
 265         struct virtio_hw *hw = dev->data->dev_private;
 266         struct virtio_pmd_ctrl ctrl;
 267         int dlen[1];
 268         int ret;
 269
 270         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 271         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 272         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 273
 274         dlen[0] = sizeof(uint16_t);
 275
 276         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 277         if (ret) {
 278                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 279                           "failed, this is too late now...");
 280                 return -EINVAL;
 281         }
 282
 283         return 0;
 284 }
 285
 286 static void
 287 virtio_dev_queue_release(void *queue __rte_unused)
 288 {
 289         /* do nothing */
 290 }
 291
 292 static int
 293 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
 294 {
 295         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
 296                 return VTNET_CQ;
 297         else if (vtpci_queue_idx % 2 == 0)
 298                 return VTNET_RQ;
 299         else
 300                 return VTNET_TQ;
 301 }
 302
 303 static uint16_t
 304 virtio_get_nr_vq(struct virtio_hw *hw)
 305 {
 306         uint16_t nr_vq = hw->max_queue_pairs * 2;
 307
 308         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 309                 nr_vq += 1;
 310
 311         return nr_vq;
 312 }
 313
 314 static void
 315 virtio_init_vring(struct virtqueue *vq)
 316 {
 317         int size = vq->vq_nentries;
 318         struct vring *vr = &vq->vq_ring;
 319         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 320
 321         PMD_INIT_FUNC_TRACE();
 322
 323         /*
 324          * Reinitialise since virtio port might have been stopped and restarted
 325          */
 326         memset(ring_mem, 0, vq->vq_ring_size);
 327         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 328         vq->vq_used_cons_idx = 0;
 329         vq->vq_desc_head_idx = 0;
 330         vq->vq_avail_idx = 0;
 331         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 332         vq->vq_free_cnt = vq->vq_nentries;
 333         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 334
 335         vring_desc_init(vr->desc, size);
 336
 337         /*
 338          * Disable device(host) interrupting guest
 339          */
 340         virtqueue_disable_intr(vq);
 341 }
 342
 343 static int
 344 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 345 {
 346         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 347         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 348         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 349         unsigned int vq_size, size;
 350         struct virtio_hw *hw = dev->data->dev_private;
 351         struct virtnet_rx *rxvq = NULL;
 352         struct virtnet_tx *txvq = NULL;
 353         struct virtnet_ctl *cvq = NULL;
 354         struct virtqueue *vq;
 355         size_t sz_hdr_mz = 0;
 356         void *sw_ring = NULL;
 357         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 358         int ret;
 359
 360         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 361
 362         /*
 363          * Read the virtqueue size from the Queue Size field
 364          * Always power of 2 and if 0 virtqueue does not exist
 365          */
 366         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 367         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 368         if (vq_size == 0) {
 369                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 370                 return -EINVAL;
 371         }
 372
 373         if (!rte_is_power_of_2(vq_size)) {
 374                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 375                 return -EINVAL;
 376         }
 377
 378         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 379                  dev->data->port_id, vtpci_queue_idx);
 380
 381         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 382                                 vq_size * sizeof(struct vq_desc_extra),
 383                                 RTE_CACHE_LINE_SIZE);
 384         if (queue_type == VTNET_TQ) {
 385                 /*
 386                  * For each xmit packet, allocate a virtio_net_hdr
 387                  * and indirect ring elements
 388                  */
 389                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 390         } else if (queue_type == VTNET_CQ) {
 391                 /* Allocate a page for control vq command, data and status */
 392                 sz_hdr_mz = PAGE_SIZE;
 393         }
 394
 395         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 396                                 SOCKET_ID_ANY);
 397         if (vq == NULL) {
 398                 PMD_INIT_LOG(ERR, "can not allocate vq");
 399                 return -ENOMEM;
 400         }
 401         hw->vqs[vtpci_queue_idx] = vq;
 402
 403         vq->hw = hw;
 404         vq->vq_queue_index = vtpci_queue_idx;
 405         vq->vq_nentries = vq_size;
 406
 407         /*
 408          * Reserve a memzone for vring elements
 409          */
 410         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 411         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 412         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 413                      size, vq->vq_ring_size);
 414
 415         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 416                                          SOCKET_ID_ANY,
 417                                          0, VIRTIO_PCI_VRING_ALIGN);
 418         if (mz == NULL) {
 419                 if (rte_errno == EEXIST)
 420                         mz = rte_memzone_lookup(vq_name);
 421                 if (mz == NULL) {
 422                         ret = -ENOMEM;
 423                         goto fail_q_alloc;
 424                 }
 425         }
 426
 427         memset(mz->addr, 0, sizeof(mz->len));
 428
 429         vq->vq_ring_mem = mz->phys_addr;
 430         vq->vq_ring_virt_mem = mz->addr;
 431         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 432                      (uint64_t)mz->phys_addr);
 433         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 434                      (uint64_t)(uintptr_t)mz->addr);
 435
 436         virtio_init_vring(vq);
 437
 438         if (sz_hdr_mz) {
 439                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 440                          dev->data->port_id, vtpci_queue_idx);
 441                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 442                                                      SOCKET_ID_ANY, 0,
 443                                                      RTE_CACHE_LINE_SIZE);
 444                 if (hdr_mz == NULL) {
 445                         if (rte_errno == EEXIST)
 446                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 447                         if (hdr_mz == NULL) {
 448                                 ret = -ENOMEM;
 449                                 goto fail_q_alloc;
 450                         }
 451                 }
 452         }
 453
 454         if (queue_type == VTNET_RQ) {
 455                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 456                                sizeof(vq->sw_ring[0]);
 457
 458                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 459                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 460                 if (!sw_ring) {
 461                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 462                         ret = -ENOMEM;
 463                         goto fail_q_alloc;
 464                 }
 465
 466                 vq->sw_ring = sw_ring;
 467                 rxvq = &vq->rxq;
 468                 rxvq->vq = vq;
 469                 rxvq->port_id = dev->data->port_id;
 470                 rxvq->mz = mz;
 471         } else if (queue_type == VTNET_TQ) {
 472                 txvq = &vq->txq;
 473                 txvq->vq = vq;
 474                 txvq->port_id = dev->data->port_id;
 475                 txvq->mz = mz;
 476                 txvq->virtio_net_hdr_mz = hdr_mz;
 477                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 478         } else if (queue_type == VTNET_CQ) {
 479                 cvq = &vq->cq;
 480                 cvq->vq = vq;
 481                 cvq->mz = mz;
 482                 cvq->virtio_net_hdr_mz = hdr_mz;
 483                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 484                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 485
 486                 hw->cvq = cvq;
 487         }
 488
 489         /* For virtio_user case (that is when hw->dev is NULL), we use
 490          * virtual address. And we need properly set _offset_, please see
 491          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 492          */
 493         if (!hw->virtio_user_dev)
 494                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 495         else {
 496                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 497                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 498                 if (queue_type == VTNET_TQ)
 499                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 500                 else if (queue_type == VTNET_CQ)
 501                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 502         }
 503
 504         if (queue_type == VTNET_TQ) {
 505                 struct virtio_tx_region *txr;
 506                 unsigned int i;
 507
 508                 txr = hdr_mz->addr;
 509                 memset(txr, 0, vq_size * sizeof(*txr));
 510                 for (i = 0; i < vq_size; i++) {
 511                         struct vring_desc *start_dp = txr[i].tx_indir;
 512
 513                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 514
 515                         /* first indirect descriptor is always the tx header */
 516                         start_dp->addr = txvq->virtio_net_hdr_mem
 517                                 + i * sizeof(*txr)
 518                                 + offsetof(struct virtio_tx_region, tx_hdr);
 519
 520                         start_dp->len = hw->vtnet_hdr_size;
 521                         start_dp->flags = VRING_DESC_F_NEXT;
 522                 }
 523         }
 524
 525         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 526                 PMD_INIT_LOG(ERR, "setup_queue failed");
 527                 return -EINVAL;
 528         }
 529
 530         return 0;
 531
 532 fail_q_alloc:
 533         rte_free(sw_ring);
 534         rte_memzone_free(hdr_mz);
 535         rte_memzone_free(mz);
 536         rte_free(vq);
 537
 538         return ret;
 539 }
 540
 541 static void
 542 virtio_free_queues(struct virtio_hw *hw)
 543 {
 544         uint16_t nr_vq = virtio_get_nr_vq(hw);
 545         struct virtqueue *vq;
 546         int queue_type;
 547         uint16_t i;
 548
 549         if (hw->vqs == NULL)
 550                 return;
 551
 552         for (i = 0; i < nr_vq; i++) {
 553                 vq = hw->vqs[i];
 554                 if (!vq)
 555                         continue;
 556
 557                 queue_type = virtio_get_queue_type(hw, i);
 558                 if (queue_type == VTNET_RQ) {
 559                         rte_free(vq->sw_ring);
 560                         rte_memzone_free(vq->rxq.mz);
 561                 } else if (queue_type == VTNET_TQ) {
 562                         rte_memzone_free(vq->txq.mz);
 563                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 564                 } else {
 565                         rte_memzone_free(vq->cq.mz);
 566                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 567                 }
 568
 569                 rte_free(vq);
 570                 hw->vqs[i] = NULL;
 571         }
 572
 573         rte_free(hw->vqs);
 574         hw->vqs = NULL;
 575 }
 576
 577 static int
 578 virtio_alloc_queues(struct rte_eth_dev *dev)
 579 {
 580         struct virtio_hw *hw = dev->data->dev_private;
 581         uint16_t nr_vq = virtio_get_nr_vq(hw);
 582         uint16_t i;
 583         int ret;
 584
 585         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 586         if (!hw->vqs) {
 587                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 588                 return -ENOMEM;
 589         }
 590
 591         for (i = 0; i < nr_vq; i++) {
 592                 ret = virtio_init_queue(dev, i);
 593                 if (ret < 0) {
 594                         virtio_free_queues(hw);
 595                         return ret;
 596                 }
 597         }
 598
 599         return 0;
 600 }
 601
 602 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 603
 604 static void
 605 virtio_dev_close(struct rte_eth_dev *dev)
 606 {
 607         struct virtio_hw *hw = dev->data->dev_private;
 608         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 609
 610         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 611
 612         /* reset the NIC */
 613         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 614                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 615         if (intr_conf->rxq)
 616                 virtio_queues_unbind_intr(dev);
 617
 618         if (intr_conf->lsc || intr_conf->rxq) {
 619                 rte_intr_disable(dev->intr_handle);
 620                 rte_intr_efd_disable(dev->intr_handle);
 621                 rte_free(dev->intr_handle->intr_vec);
 622                 dev->intr_handle->intr_vec = NULL;
 623         }
 624
 625         vtpci_reset(hw);
 626         virtio_dev_free_mbufs(dev);
 627         virtio_free_queues(hw);
 628 }
 629
 630 static void
 631 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 632 {
 633         struct virtio_hw *hw = dev->data->dev_private;
 634         struct virtio_pmd_ctrl ctrl;
 635         int dlen[1];
 636         int ret;
 637
 638         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 639                 PMD_INIT_LOG(INFO, "host does not support rx control");
 640                 return;
 641         }
 642
 643         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 644         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 645         ctrl.data[0] = 1;
 646         dlen[0] = 1;
 647
 648         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 649         if (ret)
 650                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 651 }
 652
 653 static void
 654 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 655 {
 656         struct virtio_hw *hw = dev->data->dev_private;
 657         struct virtio_pmd_ctrl ctrl;
 658         int dlen[1];
 659         int ret;
 660
 661         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 662                 PMD_INIT_LOG(INFO, "host does not support rx control");
 663                 return;
 664         }
 665
 666         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 667         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 668         ctrl.data[0] = 0;
 669         dlen[0] = 1;
 670
 671         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 672         if (ret)
 673                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 674 }
 675
 676 static void
 677 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 678 {
 679         struct virtio_hw *hw = dev->data->dev_private;
 680         struct virtio_pmd_ctrl ctrl;
 681         int dlen[1];
 682         int ret;
 683
 684         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 685                 PMD_INIT_LOG(INFO, "host does not support rx control");
 686                 return;
 687         }
 688
 689         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 690         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 691         ctrl.data[0] = 1;
 692         dlen[0] = 1;
 693
 694         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 695         if (ret)
 696                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 697 }
 698
 699 static void
 700 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 701 {
 702         struct virtio_hw *hw = dev->data->dev_private;
 703         struct virtio_pmd_ctrl ctrl;
 704         int dlen[1];
 705         int ret;
 706
 707         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 708                 PMD_INIT_LOG(INFO, "host does not support rx control");
 709                 return;
 710         }
 711
 712         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 713         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 714         ctrl.data[0] = 0;
 715         dlen[0] = 1;
 716
 717         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 718         if (ret)
 719                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 720 }
 721
 722 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 723 static int
 724 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 725 {
 726         struct virtio_hw *hw = dev->data->dev_private;
 727         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 728                                  hw->vtnet_hdr_size;
 729         uint32_t frame_size = mtu + ether_hdr_len;
 730         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 731
 732         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 733
 734         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 735                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 736                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 737                 return -EINVAL;
 738         }
 739         return 0;
 740 }
 741
 742 static int
 743 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 744 {
 745         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 746         struct virtqueue *vq = rxvq->vq;
 747
 748         virtqueue_enable_intr(vq);
 749         return 0;
 750 }
 751
 752 static int
 753 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 754 {
 755         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 756         struct virtqueue *vq = rxvq->vq;
 757
 758         virtqueue_disable_intr(vq);
 759         return 0;
 760 }
 761
 762 /*
 763  * dev_ops for virtio, bare necessities for basic operation
 764  */
 765 static const struct eth_dev_ops virtio_eth_dev_ops = {
 766         .dev_configure           = virtio_dev_configure,
 767         .dev_start               = virtio_dev_start,
 768         .dev_stop                = virtio_dev_stop,
 769         .dev_close               = virtio_dev_close,
 770         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 771         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 772         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 773         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 774         .mtu_set                 = virtio_mtu_set,
 775         .dev_infos_get           = virtio_dev_info_get,
 776         .stats_get               = virtio_dev_stats_get,
 777         .xstats_get              = virtio_dev_xstats_get,
 778         .xstats_get_names        = virtio_dev_xstats_get_names,
 779         .stats_reset             = virtio_dev_stats_reset,
 780         .xstats_reset            = virtio_dev_stats_reset,
 781         .link_update             = virtio_dev_link_update,
 782         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 783         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 784         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 785         .rx_queue_release        = virtio_dev_queue_release,
 786         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 787         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 788         .tx_queue_release        = virtio_dev_queue_release,
 789         /* collect stats per queue */
 790         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 791         .vlan_filter_set         = virtio_vlan_filter_set,
 792         .mac_addr_add            = virtio_mac_addr_add,
 793         .mac_addr_remove         = virtio_mac_addr_remove,
 794         .mac_addr_set            = virtio_mac_addr_set,
 795 };
 796
 797 static inline int
 798 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 799                                 struct rte_eth_link *link)
 800 {
 801         struct rte_eth_link *dst = link;
 802         struct rte_eth_link *src = &(dev->data->dev_link);
 803
 804         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 805                         *(uint64_t *)src) == 0)
 806                 return -1;
 807
 808         return 0;
 809 }
 810
 811 /**
 812  * Atomically writes the link status information into global
 813  * structure rte_eth_dev.
 814  *
 815  * @param dev
 816  *   - Pointer to the structure rte_eth_dev to read from.
 817  *   - Pointer to the buffer to be saved with the link status.
 818  *
 819  * @return
 820  *   - On success, zero.
 821  *   - On failure, negative value.
 822  */
 823 static inline int
 824 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 825                 struct rte_eth_link *link)
 826 {
 827         struct rte_eth_link *dst = &(dev->data->dev_link);
 828         struct rte_eth_link *src = link;
 829
 830         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 831                                         *(uint64_t *)src) == 0)
 832                 return -1;
 833
 834         return 0;
 835 }
 836
 837 static void
 838 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 839 {
 840         unsigned i;
 841
 842         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 843                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 844                 if (txvq == NULL)
 845                         continue;
 846
 847                 stats->opackets += txvq->stats.packets;
 848                 stats->obytes += txvq->stats.bytes;
 849                 stats->oerrors += txvq->stats.errors;
 850
 851                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 852                         stats->q_opackets[i] = txvq->stats.packets;
 853                         stats->q_obytes[i] = txvq->stats.bytes;
 854                 }
 855         }
 856
 857         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 858                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 859                 if (rxvq == NULL)
 860                         continue;
 861
 862                 stats->ipackets += rxvq->stats.packets;
 863                 stats->ibytes += rxvq->stats.bytes;
 864                 stats->ierrors += rxvq->stats.errors;
 865
 866                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 867                         stats->q_ipackets[i] = rxvq->stats.packets;
 868                         stats->q_ibytes[i] = rxvq->stats.bytes;
 869                 }
 870         }
 871
 872         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 873 }
 874
 875 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 876                                        struct rte_eth_xstat_name *xstats_names,
 877                                        __rte_unused unsigned limit)
 878 {
 879         unsigned i;
 880         unsigned count = 0;
 881         unsigned t;
 882
 883         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 884                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 885
 886         if (xstats_names != NULL) {
 887                 /* Note: limit checked in rte_eth_xstats_names() */
 888
 889                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 890                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 891                         if (rxvq == NULL)
 892                                 continue;
 893                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 894                                 snprintf(xstats_names[count].name,
 895                                         sizeof(xstats_names[count].name),
 896                                         "rx_q%u_%s", i,
 897                                         rte_virtio_rxq_stat_strings[t].name);
 898                                 count++;
 899                         }
 900                 }
 901
 902                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 903                         struct virtqueue *txvq = dev->data->tx_queues[i];
 904                         if (txvq == NULL)
 905                                 continue;
 906                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 907                                 snprintf(xstats_names[count].name,
 908                                         sizeof(xstats_names[count].name),
 909                                         "tx_q%u_%s", i,
 910                                         rte_virtio_txq_stat_strings[t].name);
 911                                 count++;
 912                         }
 913                 }
 914                 return count;
 915         }
 916         return nstats;
 917 }
 918
 919 static int
 920 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 921                       unsigned n)
 922 {
 923         unsigned i;
 924         unsigned count = 0;
 925
 926         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 927                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 928
 929         if (n < nstats)
 930                 return nstats;
 931
 932         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 933                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 934
 935                 if (rxvq == NULL)
 936                         continue;
 937
 938                 unsigned t;
 939
 940                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 941                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 942                                 rte_virtio_rxq_stat_strings[t].offset);
 943                         xstats[count].id = count;
 944                         count++;
 945                 }
 946         }
 947
 948         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 949                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 950
 951                 if (txvq == NULL)
 952                         continue;
 953
 954                 unsigned t;
 955
 956                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 957                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 958                                 rte_virtio_txq_stat_strings[t].offset);
 959                         xstats[count].id = count;
 960                         count++;
 961                 }
 962         }
 963
 964         return count;
 965 }
 966
 967 static void
 968 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 969 {
 970         virtio_update_stats(dev, stats);
 971 }
 972
 973 static void
 974 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 975 {
 976         unsigned int i;
 977
 978         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 979                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 980                 if (txvq == NULL)
 981                         continue;
 982
 983                 txvq->stats.packets = 0;
 984                 txvq->stats.bytes = 0;
 985                 txvq->stats.errors = 0;
 986                 txvq->stats.multicast = 0;
 987                 txvq->stats.broadcast = 0;
 988                 memset(txvq->stats.size_bins, 0,
 989                        sizeof(txvq->stats.size_bins[0]) * 8);
 990         }
 991
 992         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 993                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 994                 if (rxvq == NULL)
 995                         continue;
 996
 997                 rxvq->stats.packets = 0;
 998                 rxvq->stats.bytes = 0;
 999                 rxvq->stats.errors = 0;
1000                 rxvq->stats.multicast = 0;
1001                 rxvq->stats.broadcast = 0;
1002                 memset(rxvq->stats.size_bins, 0,
1003                        sizeof(rxvq->stats.size_bins[0]) * 8);
1004         }
1005 }
1006
1007 static void
1008 virtio_set_hwaddr(struct virtio_hw *hw)
1009 {
1010         vtpci_write_dev_config(hw,
1011                         offsetof(struct virtio_net_config, mac),
1012                         &hw->mac_addr, ETHER_ADDR_LEN);
1013 }
1014
1015 static void
1016 virtio_get_hwaddr(struct virtio_hw *hw)
1017 {
1018         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1019                 vtpci_read_dev_config(hw,
1020                         offsetof(struct virtio_net_config, mac),
1021                         &hw->mac_addr, ETHER_ADDR_LEN);
1022         } else {
1023                 eth_random_addr(&hw->mac_addr[0]);
1024                 virtio_set_hwaddr(hw);
1025         }
1026 }
1027
1028 static void
1029 virtio_mac_table_set(struct virtio_hw *hw,
1030                      const struct virtio_net_ctrl_mac *uc,
1031                      const struct virtio_net_ctrl_mac *mc)
1032 {
1033         struct virtio_pmd_ctrl ctrl;
1034         int err, len[2];
1035
1036         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1037                 PMD_DRV_LOG(INFO, "host does not support mac table");
1038                 return;
1039         }
1040
1041         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1042         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1043
1044         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1045         memcpy(ctrl.data, uc, len[0]);
1046
1047         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1048         memcpy(ctrl.data + len[0], mc, len[1]);
1049
1050         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1051         if (err != 0)
1052                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1053 }
1054
1055 static void
1056 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1057                     uint32_t index, uint32_t vmdq __rte_unused)
1058 {
1059         struct virtio_hw *hw = dev->data->dev_private;
1060         const struct ether_addr *addrs = dev->data->mac_addrs;
1061         unsigned int i;
1062         struct virtio_net_ctrl_mac *uc, *mc;
1063
1064         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1065                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1066                 return;
1067         }
1068
1069         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1070         uc->entries = 0;
1071         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1072         mc->entries = 0;
1073
1074         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1075                 const struct ether_addr *addr
1076                         = (i == index) ? mac_addr : addrs + i;
1077                 struct virtio_net_ctrl_mac *tbl
1078                         = is_multicast_ether_addr(addr) ? mc : uc;
1079
1080                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1081         }
1082
1083         virtio_mac_table_set(hw, uc, mc);
1084 }
1085
1086 static void
1087 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1088 {
1089         struct virtio_hw *hw = dev->data->dev_private;
1090         struct ether_addr *addrs = dev->data->mac_addrs;
1091         struct virtio_net_ctrl_mac *uc, *mc;
1092         unsigned int i;
1093
1094         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1095                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1096                 return;
1097         }
1098
1099         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1100         uc->entries = 0;
1101         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1102         mc->entries = 0;
1103
1104         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1105                 struct virtio_net_ctrl_mac *tbl;
1106
1107                 if (i == index || is_zero_ether_addr(addrs + i))
1108                         continue;
1109
1110                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1111                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1112         }
1113
1114         virtio_mac_table_set(hw, uc, mc);
1115 }
1116
1117 static void
1118 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1119 {
1120         struct virtio_hw *hw = dev->data->dev_private;
1121
1122         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1123
1124         /* Use atomic update if available */
1125         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1126                 struct virtio_pmd_ctrl ctrl;
1127                 int len = ETHER_ADDR_LEN;
1128
1129                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1130                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1131
1132                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1133                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1134         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1135                 virtio_set_hwaddr(hw);
1136 }
1137
1138 static int
1139 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1140 {
1141         struct virtio_hw *hw = dev->data->dev_private;
1142         struct virtio_pmd_ctrl ctrl;
1143         int len;
1144
1145         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1146                 return -ENOTSUP;
1147
1148         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1149         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1150         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1151         len = sizeof(vlan_id);
1152
1153         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1154 }
1155
1156 static int
1157 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1158 {
1159         uint64_t host_features;
1160
1161         /* Prepare guest_features: feature that driver wants to support */
1162         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1163                 req_features);
1164
1165         /* Read device(host) feature bits */
1166         host_features = VTPCI_OPS(hw)->get_features(hw);
1167         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1168                 host_features);
1169
1170         /* If supported, ensure MTU value is valid before acknowledging it. */
1171         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1172                 struct virtio_net_config config;
1173
1174                 vtpci_read_dev_config(hw,
1175                         offsetof(struct virtio_net_config, mtu),
1176                         &config.mtu, sizeof(config.mtu));
1177
1178                 if (config.mtu < ETHER_MIN_MTU)
1179                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1180         }
1181
1182         /*
1183          * Negotiate features: Subset of device feature bits are written back
1184          * guest feature bits.
1185          */
1186         hw->guest_features = req_features;
1187         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1188         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1189                 hw->guest_features);
1190
1191         if (hw->modern) {
1192                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1193                         PMD_INIT_LOG(ERR,
1194                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1195                         return -1;
1196                 }
1197                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1198                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1199                         PMD_INIT_LOG(ERR,
1200                                 "failed to set FEATURES_OK status!");
1201                         return -1;
1202                 }
1203         }
1204
1205         hw->req_guest_features = req_features;
1206
1207         return 0;
1208 }
1209
1210 /*
1211  * Process Virtio Config changed interrupt and call the callback
1212  * if link state changed.
1213  */
1214 void
1215 virtio_interrupt_handler(void *param)
1216 {
1217         struct rte_eth_dev *dev = param;
1218         struct virtio_hw *hw = dev->data->dev_private;
1219         uint8_t isr;
1220
1221         /* Read interrupt status which clears interrupt */
1222         isr = vtpci_isr(hw);
1223         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1224
1225         if (rte_intr_enable(dev->intr_handle) < 0)
1226                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1227
1228         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1229                 if (virtio_dev_link_update(dev, 0) == 0)
1230                         _rte_eth_dev_callback_process(dev,
1231                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1232         }
1233
1234 }
1235
1236 static void
1237 rx_func_get(struct rte_eth_dev *eth_dev)
1238 {
1239         struct virtio_hw *hw = eth_dev->data->dev_private;
1240         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1241                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1242         else
1243                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1244 }
1245
1246 /* Only support 1:1 queue/interrupt mapping so far.
1247  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1248  * interrupt vectors (<N+1).
1249  */
1250 static int
1251 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1252 {
1253         uint32_t i;
1254         struct virtio_hw *hw = dev->data->dev_private;
1255
1256         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1257         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1258                 dev->intr_handle->intr_vec[i] = i + 1;
1259                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1260                                                  VIRTIO_MSI_NO_VECTOR) {
1261                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1262                         return -EBUSY;
1263                 }
1264         }
1265
1266         return 0;
1267 }
1268
1269 static void
1270 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1271 {
1272         uint32_t i;
1273         struct virtio_hw *hw = dev->data->dev_private;
1274
1275         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1276         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1277                 VTPCI_OPS(hw)->set_queue_irq(hw,
1278                                              hw->vqs[i * VTNET_CQ],
1279                                              VIRTIO_MSI_NO_VECTOR);
1280 }
1281
1282 static int
1283 virtio_configure_intr(struct rte_eth_dev *dev)
1284 {
1285         struct virtio_hw *hw = dev->data->dev_private;
1286
1287         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1288                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1289                 return -ENOTSUP;
1290         }
1291
1292         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1293                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1294                 return -1;
1295         }
1296
1297         if (!dev->intr_handle->intr_vec) {
1298                 dev->intr_handle->intr_vec =
1299                         rte_zmalloc("intr_vec",
1300                                     hw->max_queue_pairs * sizeof(int), 0);
1301                 if (!dev->intr_handle->intr_vec) {
1302                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1303                                      hw->max_queue_pairs);
1304                         return -ENOMEM;
1305                 }
1306         }
1307
1308         /* Re-register callback to update max_intr */
1309         rte_intr_callback_unregister(dev->intr_handle,
1310                                      virtio_interrupt_handler,
1311                                      dev);
1312         rte_intr_callback_register(dev->intr_handle,
1313                                    virtio_interrupt_handler,
1314                                    dev);
1315
1316         /* DO NOT try to remove this! This function will enable msix, or QEMU
1317          * will encounter SIGSEGV when DRIVER_OK is sent.
1318          * And for legacy devices, this should be done before queue/vec binding
1319          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1320          * (22) will be ignored.
1321          */
1322         if (rte_intr_enable(dev->intr_handle) < 0) {
1323                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1324                 return -1;
1325         }
1326
1327         if (virtio_queues_bind_intr(dev) < 0) {
1328                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1329                 return -1;
1330         }
1331
1332         return 0;
1333 }
1334
1335 /* reset device and renegotiate features if needed */
1336 static int
1337 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1338 {
1339         struct virtio_hw *hw = eth_dev->data->dev_private;
1340         struct virtio_net_config *config;
1341         struct virtio_net_config local_config;
1342         struct rte_pci_device *pci_dev = NULL;
1343         int ret;
1344
1345         /* Reset the device although not necessary at startup */
1346         vtpci_reset(hw);
1347
1348         /* Tell the host we've noticed this device. */
1349         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1350
1351         /* Tell the host we've known how to drive the device. */
1352         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1353         if (virtio_negotiate_features(hw, req_features) < 0)
1354                 return -1;
1355
1356         if (!hw->virtio_user_dev) {
1357                 pci_dev = RTE_DEV_TO_PCI(eth_dev->device);
1358                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1359         }
1360
1361         eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
1362         /* If host does not support both status and MSI-X then disable LSC */
1363         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1364                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1365         else
1366                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1367
1368         rx_func_get(eth_dev);
1369
1370         /* Setting up rx_header size for the device */
1371         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1372             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1373                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1374         else
1375                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1376
1377         /* Copy the permanent MAC address to: virtio_hw */
1378         virtio_get_hwaddr(hw);
1379         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1380                         &eth_dev->data->mac_addrs[0]);
1381         PMD_INIT_LOG(DEBUG,
1382                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1383                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1384                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1385
1386         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1387                 config = &local_config;
1388
1389                 vtpci_read_dev_config(hw,
1390                         offsetof(struct virtio_net_config, mac),
1391                         &config->mac, sizeof(config->mac));
1392
1393                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1394                         vtpci_read_dev_config(hw,
1395                                 offsetof(struct virtio_net_config, status),
1396                                 &config->status, sizeof(config->status));
1397                 } else {
1398                         PMD_INIT_LOG(DEBUG,
1399                                      "VIRTIO_NET_F_STATUS is not supported");
1400                         config->status = 0;
1401                 }
1402
1403                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1404                         vtpci_read_dev_config(hw,
1405                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1406                                 &config->max_virtqueue_pairs,
1407                                 sizeof(config->max_virtqueue_pairs));
1408                 } else {
1409                         PMD_INIT_LOG(DEBUG,
1410                                      "VIRTIO_NET_F_MQ is not supported");
1411                         config->max_virtqueue_pairs = 1;
1412                 }
1413
1414                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1415
1416                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1417                         vtpci_read_dev_config(hw,
1418                                 offsetof(struct virtio_net_config, mtu),
1419                                 &config->mtu,
1420                                 sizeof(config->mtu));
1421
1422                         /*
1423                          * MTU value has already been checked at negotiation
1424                          * time, but check again in case it has changed since
1425                          * then, which should not happen.
1426                          */
1427                         if (config->mtu < ETHER_MIN_MTU) {
1428                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1429                                                 config->mtu);
1430                                 return -1;
1431                         }
1432
1433                         hw->max_mtu = config->mtu;
1434                         /* Set initial MTU to maximum one supported by vhost */
1435                         eth_dev->data->mtu = config->mtu;
1436
1437                 } else {
1438                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1439                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1440                 }
1441
1442                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1443                                 config->max_virtqueue_pairs);
1444                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1445                 PMD_INIT_LOG(DEBUG,
1446                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1447                                 config->mac[0], config->mac[1],
1448                                 config->mac[2], config->mac[3],
1449                                 config->mac[4], config->mac[5]);
1450         } else {
1451                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1452                 hw->max_queue_pairs = 1;
1453         }
1454
1455         ret = virtio_alloc_queues(eth_dev);
1456         if (ret < 0)
1457                 return ret;
1458
1459         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1460                 if (virtio_configure_intr(eth_dev) < 0) {
1461                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1462                         return -1;
1463                 }
1464         }
1465
1466         vtpci_reinit_complete(hw);
1467
1468         if (pci_dev)
1469                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1470                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1471                         pci_dev->id.device_id);
1472
1473         return 0;
1474 }
1475
1476 /*
1477  * Remap the PCI device again (IO port map for legacy device and
1478  * memory map for modern device), so that the secondary process
1479  * could have the PCI initiated correctly.
1480  */
1481 static int
1482 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1483 {
1484         if (hw->modern) {
1485                 /*
1486                  * We don't have to re-parse the PCI config space, since
1487                  * rte_eal_pci_map_device() makes sure the mapped address
1488                  * in secondary process would equal to the one mapped in
1489                  * the primary process: error will be returned if that
1490                  * requirement is not met.
1491                  *
1492                  * That said, we could simply reuse all cap pointers
1493                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1494                  * primary process, which is stored in shared memory.
1495                  */
1496                 if (rte_eal_pci_map_device(pci_dev)) {
1497                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1498                         return -1;
1499                 }
1500         } else {
1501                 if (rte_eal_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1502                         return -1;
1503         }
1504
1505         return 0;
1506 }
1507
1508 static void
1509 virtio_set_vtpci_ops(struct virtio_hw *hw)
1510 {
1511 #ifdef RTE_VIRTIO_USER
1512         if (hw->virtio_user_dev)
1513                 VTPCI_OPS(hw) = &virtio_user_ops;
1514         else
1515 #endif
1516         if (hw->modern)
1517                 VTPCI_OPS(hw) = &modern_ops;
1518         else
1519                 VTPCI_OPS(hw) = &legacy_ops;
1520 }
1521
1522 /*
1523  * This function is based on probe() function in virtio_pci.c
1524  * It returns 0 on success.
1525  */
1526 int
1527 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1528 {
1529         struct virtio_hw *hw = eth_dev->data->dev_private;
1530         int ret;
1531
1532         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1533
1534         eth_dev->dev_ops = &virtio_eth_dev_ops;
1535         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1536
1537         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1538                 if (!hw->virtio_user_dev) {
1539                         ret = virtio_remap_pci(RTE_DEV_TO_PCI(eth_dev->device),
1540                                                hw);
1541                         if (ret)
1542                                 return ret;
1543                 }
1544
1545                 virtio_set_vtpci_ops(hw);
1546                 if (hw->use_simple_rxtx) {
1547                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1548                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1549                 } else {
1550                         rx_func_get(eth_dev);
1551                 }
1552                 return 0;
1553         }
1554
1555         /* Allocate memory for storing MAC addresses */
1556         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1557         if (eth_dev->data->mac_addrs == NULL) {
1558                 PMD_INIT_LOG(ERR,
1559                         "Failed to allocate %d bytes needed to store MAC addresses",
1560                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1561                 return -ENOMEM;
1562         }
1563
1564         hw->port_id = eth_dev->data->port_id;
1565         /* For virtio_user case the hw->virtio_user_dev is populated by
1566          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1567          */
1568         if (!hw->virtio_user_dev) {
1569                 ret = vtpci_init(RTE_DEV_TO_PCI(eth_dev->device), hw);
1570                 if (ret)
1571                         return ret;
1572         }
1573
1574         /* reset device and negotiate default features */
1575         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1576         if (ret < 0)
1577                 return ret;
1578
1579         /* Setup interrupt callback  */
1580         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1581                 rte_intr_callback_register(eth_dev->intr_handle,
1582                         virtio_interrupt_handler, eth_dev);
1583
1584         return 0;
1585 }
1586
1587 static int
1588 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1589 {
1590         PMD_INIT_FUNC_TRACE();
1591
1592         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1593                 return -EPERM;
1594
1595         virtio_dev_stop(eth_dev);
1596         virtio_dev_close(eth_dev);
1597
1598         eth_dev->dev_ops = NULL;
1599         eth_dev->tx_pkt_burst = NULL;
1600         eth_dev->rx_pkt_burst = NULL;
1601
1602         rte_free(eth_dev->data->mac_addrs);
1603         eth_dev->data->mac_addrs = NULL;
1604
1605         /* reset interrupt callback  */
1606         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1607                 rte_intr_callback_unregister(eth_dev->intr_handle,
1608                                                 virtio_interrupt_handler,
1609                                                 eth_dev);
1610         if (eth_dev->device)
1611                 rte_eal_pci_unmap_device(RTE_DEV_TO_PCI(eth_dev->device));
1612
1613         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1614
1615         return 0;
1616 }
1617
1618 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1619         struct rte_pci_device *pci_dev)
1620 {
1621         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1622                 eth_virtio_dev_init);
1623 }
1624
1625 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1626 {
1627         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1628 }
1629
1630 static struct rte_pci_driver rte_virtio_pmd = {
1631         .driver = {
1632                 .name = "net_virtio",
1633         },
1634         .id_table = pci_id_virtio_map,
1635         .drv_flags = 0,
1636         .probe = eth_virtio_pci_probe,
1637         .remove = eth_virtio_pci_remove,
1638 };
1639
1640 RTE_INIT(rte_virtio_pmd_init);
1641 static void
1642 rte_virtio_pmd_init(void)
1643 {
1644         if (rte_eal_iopl_init() != 0) {
1645                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1646                 return;
1647         }
1648
1649         rte_eal_pci_register(&rte_virtio_pmd);
1650 }
1651
1652 /*
1653  * Configure virtio device
1654  * It returns 0 on success.
1655  */
1656 static int
1657 virtio_dev_configure(struct rte_eth_dev *dev)
1658 {
1659         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1660         struct virtio_hw *hw = dev->data->dev_private;
1661         uint64_t req_features;
1662         int ret;
1663
1664         PMD_INIT_LOG(DEBUG, "configure");
1665         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1666         if (rxmode->hw_ip_checksum)
1667                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1668         if (rxmode->enable_lro)
1669                 req_features |=
1670                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1671                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1672
1673         /* if request features changed, reinit the device */
1674         if (req_features != hw->req_guest_features) {
1675                 ret = virtio_init_device(dev, req_features);
1676                 if (ret < 0)
1677                         return ret;
1678         }
1679
1680         if (rxmode->hw_ip_checksum &&
1681                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1682                 PMD_DRV_LOG(NOTICE,
1683                         "rx ip checksum not available on this host");
1684                 return -ENOTSUP;
1685         }
1686
1687         if (rxmode->enable_lro &&
1688                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1689                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1690                 PMD_DRV_LOG(NOTICE,
1691                         "lro not available on this host");
1692                 return -ENOTSUP;
1693         }
1694
1695         /* start control queue */
1696         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1697                 virtio_dev_cq_start(dev);
1698
1699         hw->vlan_strip = rxmode->hw_vlan_strip;
1700
1701         if (rxmode->hw_vlan_filter
1702             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1703                 PMD_DRV_LOG(NOTICE,
1704                             "vlan filtering not available on this host");
1705                 return -ENOTSUP;
1706         }
1707
1708         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1709                 /* Enable vector (0) for Link State Intrerrupt */
1710                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1711                                 VIRTIO_MSI_NO_VECTOR) {
1712                         PMD_DRV_LOG(ERR, "failed to set config vector");
1713                         return -EBUSY;
1714                 }
1715
1716         return 0;
1717 }
1718
1719
1720 static int
1721 virtio_dev_start(struct rte_eth_dev *dev)
1722 {
1723         uint16_t nb_queues, i;
1724         struct virtnet_rx *rxvq;
1725         struct virtnet_tx *txvq __rte_unused;
1726         struct virtio_hw *hw = dev->data->dev_private;
1727
1728         /* check if lsc interrupt feature is enabled */
1729         if (dev->data->dev_conf.intr_conf.lsc) {
1730                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1731                         PMD_DRV_LOG(ERR, "link status not supported by host");
1732                         return -ENOTSUP;
1733                 }
1734         }
1735
1736         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1737          * in device configure, but it could be unmapped  when device is
1738          * stopped.
1739          */
1740         if (dev->data->dev_conf.intr_conf.lsc ||
1741             dev->data->dev_conf.intr_conf.rxq) {
1742                 rte_intr_disable(dev->intr_handle);
1743
1744                 if (rte_intr_enable(dev->intr_handle) < 0) {
1745                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1746                         return -EIO;
1747                 }
1748         }
1749
1750         /*Notify the backend
1751          *Otherwise the tap backend might already stop its queue due to fullness.
1752          *vhost backend will have no chance to be waked up
1753          */
1754         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1755         if (hw->max_queue_pairs > 1) {
1756                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1757                         return -EINVAL;
1758         }
1759
1760         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1761
1762         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1763                 rxvq = dev->data->rx_queues[i];
1764                 virtqueue_notify(rxvq->vq);
1765         }
1766
1767         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1768
1769         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1770                 rxvq = dev->data->rx_queues[i];
1771                 VIRTQUEUE_DUMP(rxvq->vq);
1772         }
1773
1774         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1775                 txvq = dev->data->tx_queues[i];
1776                 VIRTQUEUE_DUMP(txvq->vq);
1777         }
1778
1779         hw->started = 1;
1780
1781         /* Initialize Link state */
1782         virtio_dev_link_update(dev, 0);
1783
1784         return 0;
1785 }
1786
1787 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1788 {
1789         struct rte_mbuf *buf;
1790         int i, mbuf_num = 0;
1791
1792         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1793                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1794
1795                 PMD_INIT_LOG(DEBUG,
1796                              "Before freeing rxq[%d] used and unused buf", i);
1797                 VIRTQUEUE_DUMP(rxvq->vq);
1798
1799                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1800                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1801                         rte_pktmbuf_free(buf);
1802                         mbuf_num++;
1803                 }
1804
1805                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1806                 PMD_INIT_LOG(DEBUG,
1807                              "After freeing rxq[%d] used and unused buf", i);
1808                 VIRTQUEUE_DUMP(rxvq->vq);
1809         }
1810
1811         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1812                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1813
1814                 PMD_INIT_LOG(DEBUG,
1815                              "Before freeing txq[%d] used and unused bufs",
1816                              i);
1817                 VIRTQUEUE_DUMP(txvq->vq);
1818
1819                 mbuf_num = 0;
1820                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1821                         rte_pktmbuf_free(buf);
1822                         mbuf_num++;
1823                 }
1824
1825                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1826                 PMD_INIT_LOG(DEBUG,
1827                              "After freeing txq[%d] used and unused buf", i);
1828                 VIRTQUEUE_DUMP(txvq->vq);
1829         }
1830 }
1831
1832 /*
1833  * Stop device: disable interrupt and mark link down
1834  */
1835 static void
1836 virtio_dev_stop(struct rte_eth_dev *dev)
1837 {
1838         struct virtio_hw *hw = dev->data->dev_private;
1839         struct rte_eth_link link;
1840         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1841
1842         PMD_INIT_LOG(DEBUG, "stop");
1843
1844         if (intr_conf->lsc || intr_conf->rxq)
1845                 rte_intr_disable(dev->intr_handle);
1846
1847         hw->started = 0;
1848         memset(&link, 0, sizeof(link));
1849         virtio_dev_atomic_write_link_status(dev, &link);
1850 }
1851
1852 static int
1853 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1854 {
1855         struct rte_eth_link link, old;
1856         uint16_t status;
1857         struct virtio_hw *hw = dev->data->dev_private;
1858         memset(&link, 0, sizeof(link));
1859         virtio_dev_atomic_read_link_status(dev, &link);
1860         old = link;
1861         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1862         link.link_speed  = SPEED_10G;
1863
1864         if (hw->started == 0) {
1865                 link.link_status = ETH_LINK_DOWN;
1866         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1867                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1868                 vtpci_read_dev_config(hw,
1869                                 offsetof(struct virtio_net_config, status),
1870                                 &status, sizeof(status));
1871                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1872                         link.link_status = ETH_LINK_DOWN;
1873                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1874                                      dev->data->port_id);
1875                 } else {
1876                         link.link_status = ETH_LINK_UP;
1877                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1878                                      dev->data->port_id);
1879                 }
1880         } else {
1881                 link.link_status = ETH_LINK_UP;
1882         }
1883         virtio_dev_atomic_write_link_status(dev, &link);
1884
1885         return (old.link_status == link.link_status) ? -1 : 0;
1886 }
1887
1888 static void
1889 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1890 {
1891         uint64_t tso_mask, host_features;
1892         struct virtio_hw *hw = dev->data->dev_private;
1893
1894         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1895
1896         dev_info->pci_dev = dev->device ? RTE_DEV_TO_PCI(dev->device) : NULL;
1897         dev_info->max_rx_queues =
1898                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1899         dev_info->max_tx_queues =
1900                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1901         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1902         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1903         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1904         dev_info->default_txconf = (struct rte_eth_txconf) {
1905                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1906         };
1907
1908         host_features = VTPCI_OPS(hw)->get_features(hw);
1909         dev_info->rx_offload_capa = 0;
1910         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
1911                 dev_info->rx_offload_capa |=
1912                         DEV_RX_OFFLOAD_TCP_CKSUM |
1913                         DEV_RX_OFFLOAD_UDP_CKSUM;
1914         }
1915         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1916                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1917         if ((host_features & tso_mask) == tso_mask)
1918                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
1919
1920         dev_info->tx_offload_capa = 0;
1921         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1922                 dev_info->tx_offload_capa |=
1923                         DEV_TX_OFFLOAD_UDP_CKSUM |
1924                         DEV_TX_OFFLOAD_TCP_CKSUM;
1925         }
1926         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1927                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1928         if ((hw->guest_features & tso_mask) == tso_mask)
1929                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1930 }
1931
1932 /*
1933  * It enables testpmd to collect per queue stats.
1934  */
1935 static int
1936 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1937 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1938 __rte_unused uint8_t is_rx)
1939 {
1940         return 0;
1941 }
1942
1943 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1944 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
1945 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio");