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 int 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 int
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 -1;
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         return err;
1054 }
1055
1056 static int
1057 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1058                     uint32_t index, uint32_t vmdq __rte_unused)
1059 {
1060         struct virtio_hw *hw = dev->data->dev_private;
1061         const struct ether_addr *addrs = dev->data->mac_addrs;
1062         unsigned int i;
1063         struct virtio_net_ctrl_mac *uc, *mc;
1064
1065         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1066                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1067                 return -EINVAL;
1068         }
1069
1070         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1071         uc->entries = 0;
1072         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1073         mc->entries = 0;
1074
1075         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1076                 const struct ether_addr *addr
1077                         = (i == index) ? mac_addr : addrs + i;
1078                 struct virtio_net_ctrl_mac *tbl
1079                         = is_multicast_ether_addr(addr) ? mc : uc;
1080
1081                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1082         }
1083
1084         return virtio_mac_table_set(hw, uc, mc);
1085 }
1086
1087 static void
1088 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1089 {
1090         struct virtio_hw *hw = dev->data->dev_private;
1091         struct ether_addr *addrs = dev->data->mac_addrs;
1092         struct virtio_net_ctrl_mac *uc, *mc;
1093         unsigned int i;
1094
1095         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1096                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1097                 return;
1098         }
1099
1100         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1101         uc->entries = 0;
1102         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1103         mc->entries = 0;
1104
1105         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1106                 struct virtio_net_ctrl_mac *tbl;
1107
1108                 if (i == index || is_zero_ether_addr(addrs + i))
1109                         continue;
1110
1111                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1112                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1113         }
1114
1115         virtio_mac_table_set(hw, uc, mc);
1116 }
1117
1118 static void
1119 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1120 {
1121         struct virtio_hw *hw = dev->data->dev_private;
1122
1123         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1124
1125         /* Use atomic update if available */
1126         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1127                 struct virtio_pmd_ctrl ctrl;
1128                 int len = ETHER_ADDR_LEN;
1129
1130                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1131                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1132
1133                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1134                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1135         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1136                 virtio_set_hwaddr(hw);
1137 }
1138
1139 static int
1140 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1141 {
1142         struct virtio_hw *hw = dev->data->dev_private;
1143         struct virtio_pmd_ctrl ctrl;
1144         int len;
1145
1146         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1147                 return -ENOTSUP;
1148
1149         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1150         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1151         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1152         len = sizeof(vlan_id);
1153
1154         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1155 }
1156
1157 static int
1158 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1159 {
1160         uint64_t host_features;
1161
1162         /* Prepare guest_features: feature that driver wants to support */
1163         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1164                 req_features);
1165
1166         /* Read device(host) feature bits */
1167         host_features = VTPCI_OPS(hw)->get_features(hw);
1168         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1169                 host_features);
1170
1171         /* If supported, ensure MTU value is valid before acknowledging it. */
1172         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1173                 struct virtio_net_config config;
1174
1175                 vtpci_read_dev_config(hw,
1176                         offsetof(struct virtio_net_config, mtu),
1177                         &config.mtu, sizeof(config.mtu));
1178
1179                 if (config.mtu < ETHER_MIN_MTU)
1180                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1181         }
1182
1183         /*
1184          * Negotiate features: Subset of device feature bits are written back
1185          * guest feature bits.
1186          */
1187         hw->guest_features = req_features;
1188         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1189         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1190                 hw->guest_features);
1191
1192         if (hw->modern) {
1193                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1194                         PMD_INIT_LOG(ERR,
1195                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1196                         return -1;
1197                 }
1198                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1199                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1200                         PMD_INIT_LOG(ERR,
1201                                 "failed to set FEATURES_OK status!");
1202                         return -1;
1203                 }
1204         }
1205
1206         hw->req_guest_features = req_features;
1207
1208         return 0;
1209 }
1210
1211 /*
1212  * Process Virtio Config changed interrupt and call the callback
1213  * if link state changed.
1214  */
1215 void
1216 virtio_interrupt_handler(void *param)
1217 {
1218         struct rte_eth_dev *dev = param;
1219         struct virtio_hw *hw = dev->data->dev_private;
1220         uint8_t isr;
1221
1222         /* Read interrupt status which clears interrupt */
1223         isr = vtpci_isr(hw);
1224         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1225
1226         if (rte_intr_enable(dev->intr_handle) < 0)
1227                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1228
1229         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1230                 if (virtio_dev_link_update(dev, 0) == 0)
1231                         _rte_eth_dev_callback_process(dev,
1232                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1233         }
1234
1235 }
1236
1237 static void
1238 rx_func_get(struct rte_eth_dev *eth_dev)
1239 {
1240         struct virtio_hw *hw = eth_dev->data->dev_private;
1241         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1242                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1243         else
1244                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1245 }
1246
1247 /* Only support 1:1 queue/interrupt mapping so far.
1248  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1249  * interrupt vectors (<N+1).
1250  */
1251 static int
1252 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1253 {
1254         uint32_t i;
1255         struct virtio_hw *hw = dev->data->dev_private;
1256
1257         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1258         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1259                 dev->intr_handle->intr_vec[i] = i + 1;
1260                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1261                                                  VIRTIO_MSI_NO_VECTOR) {
1262                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1263                         return -EBUSY;
1264                 }
1265         }
1266
1267         return 0;
1268 }
1269
1270 static void
1271 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1272 {
1273         uint32_t i;
1274         struct virtio_hw *hw = dev->data->dev_private;
1275
1276         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1277         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1278                 VTPCI_OPS(hw)->set_queue_irq(hw,
1279                                              hw->vqs[i * VTNET_CQ],
1280                                              VIRTIO_MSI_NO_VECTOR);
1281 }
1282
1283 static int
1284 virtio_configure_intr(struct rte_eth_dev *dev)
1285 {
1286         struct virtio_hw *hw = dev->data->dev_private;
1287
1288         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1289                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1290                 return -ENOTSUP;
1291         }
1292
1293         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1294                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1295                 return -1;
1296         }
1297
1298         if (!dev->intr_handle->intr_vec) {
1299                 dev->intr_handle->intr_vec =
1300                         rte_zmalloc("intr_vec",
1301                                     hw->max_queue_pairs * sizeof(int), 0);
1302                 if (!dev->intr_handle->intr_vec) {
1303                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1304                                      hw->max_queue_pairs);
1305                         return -ENOMEM;
1306                 }
1307         }
1308
1309         /* Re-register callback to update max_intr */
1310         rte_intr_callback_unregister(dev->intr_handle,
1311                                      virtio_interrupt_handler,
1312                                      dev);
1313         rte_intr_callback_register(dev->intr_handle,
1314                                    virtio_interrupt_handler,
1315                                    dev);
1316
1317         /* DO NOT try to remove this! This function will enable msix, or QEMU
1318          * will encounter SIGSEGV when DRIVER_OK is sent.
1319          * And for legacy devices, this should be done before queue/vec binding
1320          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1321          * (22) will be ignored.
1322          */
1323         if (rte_intr_enable(dev->intr_handle) < 0) {
1324                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1325                 return -1;
1326         }
1327
1328         if (virtio_queues_bind_intr(dev) < 0) {
1329                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1330                 return -1;
1331         }
1332
1333         return 0;
1334 }
1335
1336 /* reset device and renegotiate features if needed */
1337 static int
1338 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1339 {
1340         struct virtio_hw *hw = eth_dev->data->dev_private;
1341         struct virtio_net_config *config;
1342         struct virtio_net_config local_config;
1343         struct rte_pci_device *pci_dev = NULL;
1344         int ret;
1345
1346         /* Reset the device although not necessary at startup */
1347         vtpci_reset(hw);
1348
1349         /* Tell the host we've noticed this device. */
1350         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1351
1352         /* Tell the host we've known how to drive the device. */
1353         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1354         if (virtio_negotiate_features(hw, req_features) < 0)
1355                 return -1;
1356
1357         if (!hw->virtio_user_dev) {
1358                 pci_dev = RTE_DEV_TO_PCI(eth_dev->device);
1359                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1360         }
1361
1362         eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
1363         /* If host does not support both status and MSI-X then disable LSC */
1364         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1365                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1366         else
1367                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1368
1369         rx_func_get(eth_dev);
1370
1371         /* Setting up rx_header size for the device */
1372         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1373             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1374                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1375         else
1376                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1377
1378         /* Copy the permanent MAC address to: virtio_hw */
1379         virtio_get_hwaddr(hw);
1380         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1381                         &eth_dev->data->mac_addrs[0]);
1382         PMD_INIT_LOG(DEBUG,
1383                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1384                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1385                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1386
1387         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1388                 config = &local_config;
1389
1390                 vtpci_read_dev_config(hw,
1391                         offsetof(struct virtio_net_config, mac),
1392                         &config->mac, sizeof(config->mac));
1393
1394                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1395                         vtpci_read_dev_config(hw,
1396                                 offsetof(struct virtio_net_config, status),
1397                                 &config->status, sizeof(config->status));
1398                 } else {
1399                         PMD_INIT_LOG(DEBUG,
1400                                      "VIRTIO_NET_F_STATUS is not supported");
1401                         config->status = 0;
1402                 }
1403
1404                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1405                         vtpci_read_dev_config(hw,
1406                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1407                                 &config->max_virtqueue_pairs,
1408                                 sizeof(config->max_virtqueue_pairs));
1409                 } else {
1410                         PMD_INIT_LOG(DEBUG,
1411                                      "VIRTIO_NET_F_MQ is not supported");
1412                         config->max_virtqueue_pairs = 1;
1413                 }
1414
1415                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1416
1417                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1418                         vtpci_read_dev_config(hw,
1419                                 offsetof(struct virtio_net_config, mtu),
1420                                 &config->mtu,
1421                                 sizeof(config->mtu));
1422
1423                         /*
1424                          * MTU value has already been checked at negotiation
1425                          * time, but check again in case it has changed since
1426                          * then, which should not happen.
1427                          */
1428                         if (config->mtu < ETHER_MIN_MTU) {
1429                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1430                                                 config->mtu);
1431                                 return -1;
1432                         }
1433
1434                         hw->max_mtu = config->mtu;
1435                         /* Set initial MTU to maximum one supported by vhost */
1436                         eth_dev->data->mtu = config->mtu;
1437
1438                 } else {
1439                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1440                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1441                 }
1442
1443                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1444                                 config->max_virtqueue_pairs);
1445                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1446                 PMD_INIT_LOG(DEBUG,
1447                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1448                                 config->mac[0], config->mac[1],
1449                                 config->mac[2], config->mac[3],
1450                                 config->mac[4], config->mac[5]);
1451         } else {
1452                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1453                 hw->max_queue_pairs = 1;
1454         }
1455
1456         ret = virtio_alloc_queues(eth_dev);
1457         if (ret < 0)
1458                 return ret;
1459
1460         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1461                 if (virtio_configure_intr(eth_dev) < 0) {
1462                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1463                         return -1;
1464                 }
1465         }
1466
1467         vtpci_reinit_complete(hw);
1468
1469         if (pci_dev)
1470                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1471                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1472                         pci_dev->id.device_id);
1473
1474         return 0;
1475 }
1476
1477 /*
1478  * Remap the PCI device again (IO port map for legacy device and
1479  * memory map for modern device), so that the secondary process
1480  * could have the PCI initiated correctly.
1481  */
1482 static int
1483 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1484 {
1485         if (hw->modern) {
1486                 /*
1487                  * We don't have to re-parse the PCI config space, since
1488                  * rte_pci_map_device() makes sure the mapped address
1489                  * in secondary process would equal to the one mapped in
1490                  * the primary process: error will be returned if that
1491                  * requirement is not met.
1492                  *
1493                  * That said, we could simply reuse all cap pointers
1494                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1495                  * primary process, which is stored in shared memory.
1496                  */
1497                 if (rte_pci_map_device(pci_dev)) {
1498                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1499                         return -1;
1500                 }
1501         } else {
1502                 if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1503                         return -1;
1504         }
1505
1506         return 0;
1507 }
1508
1509 static void
1510 virtio_set_vtpci_ops(struct virtio_hw *hw)
1511 {
1512 #ifdef RTE_VIRTIO_USER
1513         if (hw->virtio_user_dev)
1514                 VTPCI_OPS(hw) = &virtio_user_ops;
1515         else
1516 #endif
1517         if (hw->modern)
1518                 VTPCI_OPS(hw) = &modern_ops;
1519         else
1520                 VTPCI_OPS(hw) = &legacy_ops;
1521 }
1522
1523 /*
1524  * This function is based on probe() function in virtio_pci.c
1525  * It returns 0 on success.
1526  */
1527 int
1528 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1529 {
1530         struct virtio_hw *hw = eth_dev->data->dev_private;
1531         int ret;
1532
1533         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1534
1535         eth_dev->dev_ops = &virtio_eth_dev_ops;
1536         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1537
1538         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1539                 if (!hw->virtio_user_dev) {
1540                         ret = virtio_remap_pci(RTE_DEV_TO_PCI(eth_dev->device),
1541                                                hw);
1542                         if (ret)
1543                                 return ret;
1544                 }
1545
1546                 virtio_set_vtpci_ops(hw);
1547                 if (hw->use_simple_rxtx) {
1548                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1549                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1550                 } else {
1551                         rx_func_get(eth_dev);
1552                 }
1553                 return 0;
1554         }
1555
1556         /* Allocate memory for storing MAC addresses */
1557         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1558         if (eth_dev->data->mac_addrs == NULL) {
1559                 PMD_INIT_LOG(ERR,
1560                         "Failed to allocate %d bytes needed to store MAC addresses",
1561                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1562                 return -ENOMEM;
1563         }
1564
1565         hw->port_id = eth_dev->data->port_id;
1566         /* For virtio_user case the hw->virtio_user_dev is populated by
1567          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1568          */
1569         if (!hw->virtio_user_dev) {
1570                 ret = vtpci_init(RTE_DEV_TO_PCI(eth_dev->device), hw);
1571                 if (ret)
1572                         return ret;
1573         }
1574
1575         /* reset device and negotiate default features */
1576         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1577         if (ret < 0)
1578                 return ret;
1579
1580         /* Setup interrupt callback  */
1581         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1582                 rte_intr_callback_register(eth_dev->intr_handle,
1583                         virtio_interrupt_handler, eth_dev);
1584
1585         return 0;
1586 }
1587
1588 static int
1589 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1590 {
1591         PMD_INIT_FUNC_TRACE();
1592
1593         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1594                 return -EPERM;
1595
1596         virtio_dev_stop(eth_dev);
1597         virtio_dev_close(eth_dev);
1598
1599         eth_dev->dev_ops = NULL;
1600         eth_dev->tx_pkt_burst = NULL;
1601         eth_dev->rx_pkt_burst = NULL;
1602
1603         rte_free(eth_dev->data->mac_addrs);
1604         eth_dev->data->mac_addrs = NULL;
1605
1606         /* reset interrupt callback  */
1607         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1608                 rte_intr_callback_unregister(eth_dev->intr_handle,
1609                                                 virtio_interrupt_handler,
1610                                                 eth_dev);
1611         if (eth_dev->device)
1612                 rte_pci_unmap_device(RTE_DEV_TO_PCI(eth_dev->device));
1613
1614         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1615
1616         return 0;
1617 }
1618
1619 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1620         struct rte_pci_device *pci_dev)
1621 {
1622         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1623                 eth_virtio_dev_init);
1624 }
1625
1626 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1627 {
1628         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1629 }
1630
1631 static struct rte_pci_driver rte_virtio_pmd = {
1632         .driver = {
1633                 .name = "net_virtio",
1634         },
1635         .id_table = pci_id_virtio_map,
1636         .drv_flags = 0,
1637         .probe = eth_virtio_pci_probe,
1638         .remove = eth_virtio_pci_remove,
1639 };
1640
1641 RTE_INIT(rte_virtio_pmd_init);
1642 static void
1643 rte_virtio_pmd_init(void)
1644 {
1645         if (rte_eal_iopl_init() != 0) {
1646                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1647                 return;
1648         }
1649
1650         rte_pci_register(&rte_virtio_pmd);
1651 }
1652
1653 /*
1654  * Configure virtio device
1655  * It returns 0 on success.
1656  */
1657 static int
1658 virtio_dev_configure(struct rte_eth_dev *dev)
1659 {
1660         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1661         struct virtio_hw *hw = dev->data->dev_private;
1662         uint64_t req_features;
1663         int ret;
1664
1665         PMD_INIT_LOG(DEBUG, "configure");
1666         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1667         if (rxmode->hw_ip_checksum)
1668                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1669         if (rxmode->enable_lro)
1670                 req_features |=
1671                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1672                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1673
1674         /* if request features changed, reinit the device */
1675         if (req_features != hw->req_guest_features) {
1676                 ret = virtio_init_device(dev, req_features);
1677                 if (ret < 0)
1678                         return ret;
1679         }
1680
1681         if (rxmode->hw_ip_checksum &&
1682                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1683                 PMD_DRV_LOG(NOTICE,
1684                         "rx ip checksum not available on this host");
1685                 return -ENOTSUP;
1686         }
1687
1688         if (rxmode->enable_lro &&
1689                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1690                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1691                 PMD_DRV_LOG(NOTICE,
1692                         "lro not available on this host");
1693                 return -ENOTSUP;
1694         }
1695
1696         /* start control queue */
1697         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1698                 virtio_dev_cq_start(dev);
1699
1700         hw->vlan_strip = rxmode->hw_vlan_strip;
1701
1702         if (rxmode->hw_vlan_filter
1703             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1704                 PMD_DRV_LOG(NOTICE,
1705                             "vlan filtering not available on this host");
1706                 return -ENOTSUP;
1707         }
1708
1709         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1710                 /* Enable vector (0) for Link State Intrerrupt */
1711                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1712                                 VIRTIO_MSI_NO_VECTOR) {
1713                         PMD_DRV_LOG(ERR, "failed to set config vector");
1714                         return -EBUSY;
1715                 }
1716
1717         return 0;
1718 }
1719
1720
1721 static int
1722 virtio_dev_start(struct rte_eth_dev *dev)
1723 {
1724         uint16_t nb_queues, i;
1725         struct virtnet_rx *rxvq;
1726         struct virtnet_tx *txvq __rte_unused;
1727         struct virtio_hw *hw = dev->data->dev_private;
1728
1729         /* check if lsc interrupt feature is enabled */
1730         if (dev->data->dev_conf.intr_conf.lsc) {
1731                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1732                         PMD_DRV_LOG(ERR, "link status not supported by host");
1733                         return -ENOTSUP;
1734                 }
1735         }
1736
1737         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1738          * in device configure, but it could be unmapped  when device is
1739          * stopped.
1740          */
1741         if (dev->data->dev_conf.intr_conf.lsc ||
1742             dev->data->dev_conf.intr_conf.rxq) {
1743                 rte_intr_disable(dev->intr_handle);
1744
1745                 if (rte_intr_enable(dev->intr_handle) < 0) {
1746                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1747                         return -EIO;
1748                 }
1749         }
1750
1751         /*Notify the backend
1752          *Otherwise the tap backend might already stop its queue due to fullness.
1753          *vhost backend will have no chance to be waked up
1754          */
1755         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1756         if (hw->max_queue_pairs > 1) {
1757                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1758                         return -EINVAL;
1759         }
1760
1761         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1762
1763         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1764                 rxvq = dev->data->rx_queues[i];
1765                 virtqueue_notify(rxvq->vq);
1766         }
1767
1768         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1769
1770         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1771                 rxvq = dev->data->rx_queues[i];
1772                 VIRTQUEUE_DUMP(rxvq->vq);
1773         }
1774
1775         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1776                 txvq = dev->data->tx_queues[i];
1777                 VIRTQUEUE_DUMP(txvq->vq);
1778         }
1779
1780         hw->started = 1;
1781
1782         /* Initialize Link state */
1783         virtio_dev_link_update(dev, 0);
1784
1785         return 0;
1786 }
1787
1788 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1789 {
1790         struct rte_mbuf *buf;
1791         int i, mbuf_num = 0;
1792
1793         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1794                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1795
1796                 PMD_INIT_LOG(DEBUG,
1797                              "Before freeing rxq[%d] used and unused buf", i);
1798                 VIRTQUEUE_DUMP(rxvq->vq);
1799
1800                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1801                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1802                         rte_pktmbuf_free(buf);
1803                         mbuf_num++;
1804                 }
1805
1806                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1807                 PMD_INIT_LOG(DEBUG,
1808                              "After freeing rxq[%d] used and unused buf", i);
1809                 VIRTQUEUE_DUMP(rxvq->vq);
1810         }
1811
1812         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1813                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1814
1815                 PMD_INIT_LOG(DEBUG,
1816                              "Before freeing txq[%d] used and unused bufs",
1817                              i);
1818                 VIRTQUEUE_DUMP(txvq->vq);
1819
1820                 mbuf_num = 0;
1821                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1822                         rte_pktmbuf_free(buf);
1823                         mbuf_num++;
1824                 }
1825
1826                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1827                 PMD_INIT_LOG(DEBUG,
1828                              "After freeing txq[%d] used and unused buf", i);
1829                 VIRTQUEUE_DUMP(txvq->vq);
1830         }
1831 }
1832
1833 /*
1834  * Stop device: disable interrupt and mark link down
1835  */
1836 static void
1837 virtio_dev_stop(struct rte_eth_dev *dev)
1838 {
1839         struct virtio_hw *hw = dev->data->dev_private;
1840         struct rte_eth_link link;
1841         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1842
1843         PMD_INIT_LOG(DEBUG, "stop");
1844
1845         if (intr_conf->lsc || intr_conf->rxq)
1846                 rte_intr_disable(dev->intr_handle);
1847
1848         hw->started = 0;
1849         memset(&link, 0, sizeof(link));
1850         virtio_dev_atomic_write_link_status(dev, &link);
1851 }
1852
1853 static int
1854 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1855 {
1856         struct rte_eth_link link, old;
1857         uint16_t status;
1858         struct virtio_hw *hw = dev->data->dev_private;
1859         memset(&link, 0, sizeof(link));
1860         virtio_dev_atomic_read_link_status(dev, &link);
1861         old = link;
1862         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1863         link.link_speed  = SPEED_10G;
1864
1865         if (hw->started == 0) {
1866                 link.link_status = ETH_LINK_DOWN;
1867         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1868                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1869                 vtpci_read_dev_config(hw,
1870                                 offsetof(struct virtio_net_config, status),
1871                                 &status, sizeof(status));
1872                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1873                         link.link_status = ETH_LINK_DOWN;
1874                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1875                                      dev->data->port_id);
1876                 } else {
1877                         link.link_status = ETH_LINK_UP;
1878                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1879                                      dev->data->port_id);
1880                 }
1881         } else {
1882                 link.link_status = ETH_LINK_UP;
1883         }
1884         virtio_dev_atomic_write_link_status(dev, &link);
1885
1886         return (old.link_status == link.link_status) ? -1 : 0;
1887 }
1888
1889 static void
1890 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1891 {
1892         uint64_t tso_mask, host_features;
1893         struct virtio_hw *hw = dev->data->dev_private;
1894
1895         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1896
1897         dev_info->pci_dev = dev->device ? RTE_DEV_TO_PCI(dev->device) : NULL;
1898         dev_info->max_rx_queues =
1899                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1900         dev_info->max_tx_queues =
1901                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1902         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1903         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1904         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1905         dev_info->default_txconf = (struct rte_eth_txconf) {
1906                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1907         };
1908
1909         host_features = VTPCI_OPS(hw)->get_features(hw);
1910         dev_info->rx_offload_capa = 0;
1911         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
1912                 dev_info->rx_offload_capa |=
1913                         DEV_RX_OFFLOAD_TCP_CKSUM |
1914                         DEV_RX_OFFLOAD_UDP_CKSUM;
1915         }
1916         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1917                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1918         if ((host_features & tso_mask) == tso_mask)
1919                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
1920
1921         dev_info->tx_offload_capa = 0;
1922         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1923                 dev_info->tx_offload_capa |=
1924                         DEV_TX_OFFLOAD_UDP_CKSUM |
1925                         DEV_TX_OFFLOAD_TCP_CKSUM;
1926         }
1927         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1928                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1929         if ((hw->guest_features & tso_mask) == tso_mask)
1930                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1931 }
1932
1933 /*
1934  * It enables testpmd to collect per queue stats.
1935  */
1936 static int
1937 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1938 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1939 __rte_unused uint8_t is_rx)
1940 {
1941         return 0;
1942 }
1943
1944 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1945 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
1946 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio");