drivers/net/virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdint.h>
  35 #include <string.h>
  36 #include <stdio.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39
  40 #include <rte_ethdev.h>
  41 #include <rte_memcpy.h>
  42 #include <rte_string_fns.h>
  43 #include <rte_memzone.h>
  44 #include <rte_malloc.h>
  45 #include <rte_atomic.h>
  46 #include <rte_branch_prediction.h>
  47 #include <rte_pci.h>
  48 #include <rte_ether.h>
  49 #include <rte_common.h>
  50 #include <rte_errno.h>
  51
  52 #include <rte_memory.h>
  53 #include <rte_eal.h>
  54 #include <rte_dev.h>
  55
  56 #include "virtio_ethdev.h"
  57 #include "virtio_pci.h"
  58 #include "virtio_logs.h"
  59 #include "virtqueue.h"
  60 #include "virtio_rxtx.h"
  61
  62 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  63 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  64 static int  virtio_dev_start(struct rte_eth_dev *dev);
  65 static void virtio_dev_stop(struct rte_eth_dev *dev);
  66 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  67 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  68 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  69 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  70 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  71                                 struct rte_eth_dev_info *dev_info);
  72 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  73         __rte_unused int wait_to_complete);
  74
  75 static void virtio_set_hwaddr(struct virtio_hw *hw);
  76 static void virtio_get_hwaddr(struct virtio_hw *hw);
  77
  78 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  79                                  struct rte_eth_stats *stats);
  80 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  81                                  struct rte_eth_xstat *xstats, unsigned n);
  82 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  83                                        struct rte_eth_xstat_name *xstats_names,
  84                                        unsigned limit);
  85 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  86 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  87 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  88                                 uint16_t vlan_id, int on);
  89 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  90                                 struct ether_addr *mac_addr,
  91                                 uint32_t index, uint32_t vmdq __rte_unused);
  92 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  93 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  94                                 struct ether_addr *mac_addr);
  95
  96 static int virtio_dev_queue_stats_mapping_set(
  97         __rte_unused struct rte_eth_dev *eth_dev,
  98         __rte_unused uint16_t queue_id,
  99         __rte_unused uint8_t stat_idx,
 100         __rte_unused uint8_t is_rx);
 101
 102 /*
 103  * The set of PCI devices this driver supports
 104  */
 105 static const struct rte_pci_id pci_id_virtio_map[] = {
 106         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
 107         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 108         { .vendor_id = 0, /* sentinel */ },
 109 };
 110
 111 struct rte_virtio_xstats_name_off {
 112         char name[RTE_ETH_XSTATS_NAME_SIZE];
 113         unsigned offset;
 114 };
 115
 116 /* [rt]x_qX_ is prepended to the name string here */
 117 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 118         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 119         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 120         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 121         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 122         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 123         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 124         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 125         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 126         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 127         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 128         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 129         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 130         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 131 };
 132
 133 /* [rt]x_qX_ is prepended to the name string here */
 134 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 135         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 136         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 137         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 138         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 139         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 140         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 141         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 142         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 143         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 144         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 145         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 146         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 147         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 148 };
 149
 150 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 151                             sizeof(rte_virtio_rxq_stat_strings[0]))
 152 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 153                             sizeof(rte_virtio_txq_stat_strings[0]))
 154
 155 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 156
 157 static int
 158 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 159                 int *dlen, int pkt_num)
 160 {
 161         uint32_t head, i;
 162         int k, sum = 0;
 163         virtio_net_ctrl_ack status = ~0;
 164         struct virtio_pmd_ctrl result;
 165         struct virtqueue *vq;
 166
 167         ctrl->status = status;
 168
 169         if (!cvq || !cvq->vq) {
 170                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 171                 return -1;
 172         }
 173         vq = cvq->vq;
 174         head = vq->vq_desc_head_idx;
 175
 176         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 177                 "vq->hw->cvq = %p vq = %p",
 178                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 179
 180         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 181                 return -1;
 182
 183         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 184                 sizeof(struct virtio_pmd_ctrl));
 185
 186         /*
 187          * Format is enforced in qemu code:
 188          * One TX packet for header;
 189          * At least one TX packet per argument;
 190          * One RX packet for ACK.
 191          */
 192         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 193         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 194         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 195         vq->vq_free_cnt--;
 196         i = vq->vq_ring.desc[head].next;
 197
 198         for (k = 0; k < pkt_num; k++) {
 199                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 200                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 201                         + sizeof(struct virtio_net_ctrl_hdr)
 202                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 203                 vq->vq_ring.desc[i].len = dlen[k];
 204                 sum += dlen[k];
 205                 vq->vq_free_cnt--;
 206                 i = vq->vq_ring.desc[i].next;
 207         }
 208
 209         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 210         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 211                         + sizeof(struct virtio_net_ctrl_hdr);
 212         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 213         vq->vq_free_cnt--;
 214
 215         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 216
 217         vq_update_avail_ring(vq, head);
 218         vq_update_avail_idx(vq);
 219
 220         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 221
 222         virtqueue_notify(vq);
 223
 224         rte_rmb();
 225         while (VIRTQUEUE_NUSED(vq) == 0) {
 226                 rte_rmb();
 227                 usleep(100);
 228         }
 229
 230         while (VIRTQUEUE_NUSED(vq)) {
 231                 uint32_t idx, desc_idx, used_idx;
 232                 struct vring_used_elem *uep;
 233
 234                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 235                                 & (vq->vq_nentries - 1));
 236                 uep = &vq->vq_ring.used->ring[used_idx];
 237                 idx = (uint32_t) uep->id;
 238                 desc_idx = idx;
 239
 240                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 241                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 242                         vq->vq_free_cnt++;
 243                 }
 244
 245                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 246                 vq->vq_desc_head_idx = idx;
 247
 248                 vq->vq_used_cons_idx++;
 249                 vq->vq_free_cnt++;
 250         }
 251
 252         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 253                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 254
 255         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
 256                         sizeof(struct virtio_pmd_ctrl));
 257
 258         return result.status;
 259 }
 260
 261 static int
 262 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 263 {
 264         struct virtio_hw *hw = dev->data->dev_private;
 265         struct virtio_pmd_ctrl ctrl;
 266         int dlen[1];
 267         int ret;
 268
 269         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 270         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 271         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 272
 273         dlen[0] = sizeof(uint16_t);
 274
 275         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 276         if (ret) {
 277                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 278                           "failed, this is too late now...");
 279                 return -EINVAL;
 280         }
 281
 282         return 0;
 283 }
 284
 285 static void
 286 virtio_dev_queue_release(void *queue __rte_unused)
 287 {
 288         /* do nothing */
 289 }
 290
 291 static int
 292 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
 293 {
 294         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
 295                 return VTNET_CQ;
 296         else if (vtpci_queue_idx % 2 == 0)
 297                 return VTNET_RQ;
 298         else
 299                 return VTNET_TQ;
 300 }
 301
 302 static uint16_t
 303 virtio_get_nr_vq(struct virtio_hw *hw)
 304 {
 305         uint16_t nr_vq = hw->max_queue_pairs * 2;
 306
 307         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 308                 nr_vq += 1;
 309
 310         return nr_vq;
 311 }
 312
 313 static void
 314 virtio_init_vring(struct virtqueue *vq)
 315 {
 316         int size = vq->vq_nentries;
 317         struct vring *vr = &vq->vq_ring;
 318         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 319
 320         PMD_INIT_FUNC_TRACE();
 321
 322         /*
 323          * Reinitialise since virtio port might have been stopped and restarted
 324          */
 325         memset(ring_mem, 0, vq->vq_ring_size);
 326         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 327         vq->vq_used_cons_idx = 0;
 328         vq->vq_desc_head_idx = 0;
 329         vq->vq_avail_idx = 0;
 330         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 331         vq->vq_free_cnt = vq->vq_nentries;
 332         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 333
 334         vring_desc_init(vr->desc, size);
 335
 336         /*
 337          * Disable device(host) interrupting guest
 338          */
 339         virtqueue_disable_intr(vq);
 340 }
 341
 342 static int
 343 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 344 {
 345         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 346         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 347         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 348         unsigned int vq_size, size;
 349         struct virtio_hw *hw = dev->data->dev_private;
 350         struct virtnet_rx *rxvq = NULL;
 351         struct virtnet_tx *txvq = NULL;
 352         struct virtnet_ctl *cvq = NULL;
 353         struct virtqueue *vq;
 354         size_t sz_hdr_mz = 0;
 355         void *sw_ring = NULL;
 356         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 357         int ret;
 358
 359         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 360
 361         /*
 362          * Read the virtqueue size from the Queue Size field
 363          * Always power of 2 and if 0 virtqueue does not exist
 364          */
 365         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 366         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 367         if (vq_size == 0) {
 368                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 369                 return -EINVAL;
 370         }
 371
 372         if (!rte_is_power_of_2(vq_size)) {
 373                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 374                 return -EINVAL;
 375         }
 376
 377         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 378                  dev->data->port_id, vtpci_queue_idx);
 379
 380         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 381                                 vq_size * sizeof(struct vq_desc_extra),
 382                                 RTE_CACHE_LINE_SIZE);
 383         if (queue_type == VTNET_TQ) {
 384                 /*
 385                  * For each xmit packet, allocate a virtio_net_hdr
 386                  * and indirect ring elements
 387                  */
 388                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 389         } else if (queue_type == VTNET_CQ) {
 390                 /* Allocate a page for control vq command, data and status */
 391                 sz_hdr_mz = PAGE_SIZE;
 392         }
 393
 394         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 395                                 SOCKET_ID_ANY);
 396         if (vq == NULL) {
 397                 PMD_INIT_LOG(ERR, "can not allocate vq");
 398                 return -ENOMEM;
 399         }
 400         hw->vqs[vtpci_queue_idx] = vq;
 401
 402         vq->hw = hw;
 403         vq->vq_queue_index = vtpci_queue_idx;
 404         vq->vq_nentries = vq_size;
 405
 406         /*
 407          * Reserve a memzone for vring elements
 408          */
 409         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 410         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 411         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 412                      size, vq->vq_ring_size);
 413
 414         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 415                                          SOCKET_ID_ANY,
 416                                          0, VIRTIO_PCI_VRING_ALIGN);
 417         if (mz == NULL) {
 418                 if (rte_errno == EEXIST)
 419                         mz = rte_memzone_lookup(vq_name);
 420                 if (mz == NULL) {
 421                         ret = -ENOMEM;
 422                         goto fail_q_alloc;
 423                 }
 424         }
 425
 426         memset(mz->addr, 0, sizeof(mz->len));
 427
 428         vq->vq_ring_mem = mz->phys_addr;
 429         vq->vq_ring_virt_mem = mz->addr;
 430         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 431                      (uint64_t)mz->phys_addr);
 432         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 433                      (uint64_t)(uintptr_t)mz->addr);
 434
 435         virtio_init_vring(vq);
 436
 437         if (sz_hdr_mz) {
 438                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 439                          dev->data->port_id, vtpci_queue_idx);
 440                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 441                                                      SOCKET_ID_ANY, 0,
 442                                                      RTE_CACHE_LINE_SIZE);
 443                 if (hdr_mz == NULL) {
 444                         if (rte_errno == EEXIST)
 445                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 446                         if (hdr_mz == NULL) {
 447                                 ret = -ENOMEM;
 448                                 goto fail_q_alloc;
 449                         }
 450                 }
 451         }
 452
 453         if (queue_type == VTNET_RQ) {
 454                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 455                                sizeof(vq->sw_ring[0]);
 456
 457                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 458                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 459                 if (!sw_ring) {
 460                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 461                         ret = -ENOMEM;
 462                         goto fail_q_alloc;
 463                 }
 464
 465                 vq->sw_ring = sw_ring;
 466                 rxvq = &vq->rxq;
 467                 rxvq->vq = vq;
 468                 rxvq->port_id = dev->data->port_id;
 469                 rxvq->mz = mz;
 470         } else if (queue_type == VTNET_TQ) {
 471                 txvq = &vq->txq;
 472                 txvq->vq = vq;
 473                 txvq->port_id = dev->data->port_id;
 474                 txvq->mz = mz;
 475                 txvq->virtio_net_hdr_mz = hdr_mz;
 476                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 477         } else if (queue_type == VTNET_CQ) {
 478                 cvq = &vq->cq;
 479                 cvq->vq = vq;
 480                 cvq->mz = mz;
 481                 cvq->virtio_net_hdr_mz = hdr_mz;
 482                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 483                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 484
 485                 hw->cvq = cvq;
 486         }
 487
 488         /* For virtio_user case (that is when hw->dev is NULL), we use
 489          * virtual address. And we need properly set _offset_, please see
 490          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 491          */
 492         if (!hw->virtio_user_dev)
 493                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 494         else {
 495                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 496                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 497                 if (queue_type == VTNET_TQ)
 498                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 499                 else if (queue_type == VTNET_CQ)
 500                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 501         }
 502
 503         if (queue_type == VTNET_TQ) {
 504                 struct virtio_tx_region *txr;
 505                 unsigned int i;
 506
 507                 txr = hdr_mz->addr;
 508                 memset(txr, 0, vq_size * sizeof(*txr));
 509                 for (i = 0; i < vq_size; i++) {
 510                         struct vring_desc *start_dp = txr[i].tx_indir;
 511
 512                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 513
 514                         /* first indirect descriptor is always the tx header */
 515                         start_dp->addr = txvq->virtio_net_hdr_mem
 516                                 + i * sizeof(*txr)
 517                                 + offsetof(struct virtio_tx_region, tx_hdr);
 518
 519                         start_dp->len = hw->vtnet_hdr_size;
 520                         start_dp->flags = VRING_DESC_F_NEXT;
 521                 }
 522         }
 523
 524         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 525                 PMD_INIT_LOG(ERR, "setup_queue failed");
 526                 return -EINVAL;
 527         }
 528
 529         return 0;
 530
 531 fail_q_alloc:
 532         rte_free(sw_ring);
 533         rte_memzone_free(hdr_mz);
 534         rte_memzone_free(mz);
 535         rte_free(vq);
 536
 537         return ret;
 538 }
 539
 540 static void
 541 virtio_free_queues(struct virtio_hw *hw)
 542 {
 543         uint16_t nr_vq = virtio_get_nr_vq(hw);
 544         struct virtqueue *vq;
 545         int queue_type;
 546         uint16_t i;
 547
 548         for (i = 0; i < nr_vq; i++) {
 549                 vq = hw->vqs[i];
 550                 if (!vq)
 551                         continue;
 552
 553                 queue_type = virtio_get_queue_type(hw, i);
 554                 if (queue_type == VTNET_RQ) {
 555                         rte_free(vq->sw_ring);
 556                         rte_memzone_free(vq->rxq.mz);
 557                 } else if (queue_type == VTNET_TQ) {
 558                         rte_memzone_free(vq->txq.mz);
 559                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 560                 } else {
 561                         rte_memzone_free(vq->cq.mz);
 562                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 563                 }
 564
 565                 rte_free(vq);
 566         }
 567
 568         rte_free(hw->vqs);
 569 }
 570
 571 static int
 572 virtio_alloc_queues(struct rte_eth_dev *dev)
 573 {
 574         struct virtio_hw *hw = dev->data->dev_private;
 575         uint16_t nr_vq = virtio_get_nr_vq(hw);
 576         uint16_t i;
 577         int ret;
 578
 579         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 580         if (!hw->vqs) {
 581                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 582                 return -ENOMEM;
 583         }
 584
 585         for (i = 0; i < nr_vq; i++) {
 586                 ret = virtio_init_queue(dev, i);
 587                 if (ret < 0) {
 588                         virtio_free_queues(hw);
 589                         return ret;
 590                 }
 591         }
 592
 593         return 0;
 594 }
 595
 596 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 597
 598 static void
 599 virtio_dev_close(struct rte_eth_dev *dev)
 600 {
 601         struct virtio_hw *hw = dev->data->dev_private;
 602         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 603
 604         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 605
 606         /* reset the NIC */
 607         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 608                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 609         if (intr_conf->rxq)
 610                 virtio_queues_unbind_intr(dev);
 611
 612         if (intr_conf->lsc || intr_conf->rxq) {
 613                 rte_intr_disable(dev->intr_handle);
 614                 rte_intr_efd_disable(dev->intr_handle);
 615                 rte_free(dev->intr_handle->intr_vec);
 616                 dev->intr_handle->intr_vec = NULL;
 617         }
 618
 619         vtpci_reset(hw);
 620         virtio_dev_free_mbufs(dev);
 621         virtio_free_queues(hw);
 622 }
 623
 624 static void
 625 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 626 {
 627         struct virtio_hw *hw = dev->data->dev_private;
 628         struct virtio_pmd_ctrl ctrl;
 629         int dlen[1];
 630         int ret;
 631
 632         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 633                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 634                 return;
 635         }
 636
 637         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 638         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 639         ctrl.data[0] = 1;
 640         dlen[0] = 1;
 641
 642         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 643         if (ret)
 644                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 645 }
 646
 647 static void
 648 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 649 {
 650         struct virtio_hw *hw = dev->data->dev_private;
 651         struct virtio_pmd_ctrl ctrl;
 652         int dlen[1];
 653         int ret;
 654
 655         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 656                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 657                 return;
 658         }
 659
 660         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 661         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 662         ctrl.data[0] = 0;
 663         dlen[0] = 1;
 664
 665         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 666         if (ret)
 667                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 668 }
 669
 670 static void
 671 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 672 {
 673         struct virtio_hw *hw = dev->data->dev_private;
 674         struct virtio_pmd_ctrl ctrl;
 675         int dlen[1];
 676         int ret;
 677
 678         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 679                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 680                 return;
 681         }
 682
 683         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 684         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 685         ctrl.data[0] = 1;
 686         dlen[0] = 1;
 687
 688         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 689         if (ret)
 690                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 691 }
 692
 693 static void
 694 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 695 {
 696         struct virtio_hw *hw = dev->data->dev_private;
 697         struct virtio_pmd_ctrl ctrl;
 698         int dlen[1];
 699         int ret;
 700
 701         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 702                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 703                 return;
 704         }
 705
 706         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 707         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 708         ctrl.data[0] = 0;
 709         dlen[0] = 1;
 710
 711         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 712         if (ret)
 713                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 714 }
 715
 716 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 717 static int
 718 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 719 {
 720         struct virtio_hw *hw = dev->data->dev_private;
 721         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 722                                  hw->vtnet_hdr_size;
 723         uint32_t frame_size = mtu + ether_hdr_len;
 724
 725         if (mtu < ETHER_MIN_MTU || frame_size > VIRTIO_MAX_RX_PKTLEN) {
 726                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d\n",
 727                         ETHER_MIN_MTU, VIRTIO_MAX_RX_PKTLEN - ether_hdr_len);
 728                 return -EINVAL;
 729         }
 730         return 0;
 731 }
 732
 733 static int
 734 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 735 {
 736         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 737         struct virtqueue *vq = rxvq->vq;
 738
 739         virtqueue_enable_intr(vq);
 740         return 0;
 741 }
 742
 743 static int
 744 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 745 {
 746         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 747         struct virtqueue *vq = rxvq->vq;
 748
 749         virtqueue_disable_intr(vq);
 750         return 0;
 751 }
 752
 753 /*
 754  * dev_ops for virtio, bare necessities for basic operation
 755  */
 756 static const struct eth_dev_ops virtio_eth_dev_ops = {
 757         .dev_configure           = virtio_dev_configure,
 758         .dev_start               = virtio_dev_start,
 759         .dev_stop                = virtio_dev_stop,
 760         .dev_close               = virtio_dev_close,
 761         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 762         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 763         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 764         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 765         .mtu_set                 = virtio_mtu_set,
 766         .dev_infos_get           = virtio_dev_info_get,
 767         .stats_get               = virtio_dev_stats_get,
 768         .xstats_get              = virtio_dev_xstats_get,
 769         .xstats_get_names        = virtio_dev_xstats_get_names,
 770         .stats_reset             = virtio_dev_stats_reset,
 771         .xstats_reset            = virtio_dev_stats_reset,
 772         .link_update             = virtio_dev_link_update,
 773         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 774         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 775         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 776         .rx_queue_release        = virtio_dev_queue_release,
 777         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 778         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 779         .tx_queue_release        = virtio_dev_queue_release,
 780         /* collect stats per queue */
 781         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 782         .vlan_filter_set         = virtio_vlan_filter_set,
 783         .mac_addr_add            = virtio_mac_addr_add,
 784         .mac_addr_remove         = virtio_mac_addr_remove,
 785         .mac_addr_set            = virtio_mac_addr_set,
 786 };
 787
 788 static inline int
 789 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 790                                 struct rte_eth_link *link)
 791 {
 792         struct rte_eth_link *dst = link;
 793         struct rte_eth_link *src = &(dev->data->dev_link);
 794
 795         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 796                         *(uint64_t *)src) == 0)
 797                 return -1;
 798
 799         return 0;
 800 }
 801
 802 /**
 803  * Atomically writes the link status information into global
 804  * structure rte_eth_dev.
 805  *
 806  * @param dev
 807  *   - Pointer to the structure rte_eth_dev to read from.
 808  *   - Pointer to the buffer to be saved with the link status.
 809  *
 810  * @return
 811  *   - On success, zero.
 812  *   - On failure, negative value.
 813  */
 814 static inline int
 815 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 816                 struct rte_eth_link *link)
 817 {
 818         struct rte_eth_link *dst = &(dev->data->dev_link);
 819         struct rte_eth_link *src = link;
 820
 821         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 822                                         *(uint64_t *)src) == 0)
 823                 return -1;
 824
 825         return 0;
 826 }
 827
 828 static void
 829 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 830 {
 831         unsigned i;
 832
 833         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 834                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 835                 if (txvq == NULL)
 836                         continue;
 837
 838                 stats->opackets += txvq->stats.packets;
 839                 stats->obytes += txvq->stats.bytes;
 840                 stats->oerrors += txvq->stats.errors;
 841
 842                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 843                         stats->q_opackets[i] = txvq->stats.packets;
 844                         stats->q_obytes[i] = txvq->stats.bytes;
 845                 }
 846         }
 847
 848         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 849                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 850                 if (rxvq == NULL)
 851                         continue;
 852
 853                 stats->ipackets += rxvq->stats.packets;
 854                 stats->ibytes += rxvq->stats.bytes;
 855                 stats->ierrors += rxvq->stats.errors;
 856
 857                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 858                         stats->q_ipackets[i] = rxvq->stats.packets;
 859                         stats->q_ibytes[i] = rxvq->stats.bytes;
 860                 }
 861         }
 862
 863         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 864 }
 865
 866 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 867                                        struct rte_eth_xstat_name *xstats_names,
 868                                        __rte_unused unsigned limit)
 869 {
 870         unsigned i;
 871         unsigned count = 0;
 872         unsigned t;
 873
 874         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 875                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 876
 877         if (xstats_names != NULL) {
 878                 /* Note: limit checked in rte_eth_xstats_names() */
 879
 880                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 881                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 882                         if (rxvq == NULL)
 883                                 continue;
 884                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 885                                 snprintf(xstats_names[count].name,
 886                                         sizeof(xstats_names[count].name),
 887                                         "rx_q%u_%s", i,
 888                                         rte_virtio_rxq_stat_strings[t].name);
 889                                 count++;
 890                         }
 891                 }
 892
 893                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 894                         struct virtqueue *txvq = dev->data->tx_queues[i];
 895                         if (txvq == NULL)
 896                                 continue;
 897                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 898                                 snprintf(xstats_names[count].name,
 899                                         sizeof(xstats_names[count].name),
 900                                         "tx_q%u_%s", i,
 901                                         rte_virtio_txq_stat_strings[t].name);
 902                                 count++;
 903                         }
 904                 }
 905                 return count;
 906         }
 907         return nstats;
 908 }
 909
 910 static int
 911 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 912                       unsigned n)
 913 {
 914         unsigned i;
 915         unsigned count = 0;
 916
 917         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 918                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 919
 920         if (n < nstats)
 921                 return nstats;
 922
 923         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 924                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 925
 926                 if (rxvq == NULL)
 927                         continue;
 928
 929                 unsigned t;
 930
 931                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 932                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 933                                 rte_virtio_rxq_stat_strings[t].offset);
 934                         xstats[count].id = count;
 935                         count++;
 936                 }
 937         }
 938
 939         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 940                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 941
 942                 if (txvq == NULL)
 943                         continue;
 944
 945                 unsigned t;
 946
 947                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 948                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 949                                 rte_virtio_txq_stat_strings[t].offset);
 950                         xstats[count].id = count;
 951                         count++;
 952                 }
 953         }
 954
 955         return count;
 956 }
 957
 958 static void
 959 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 960 {
 961         virtio_update_stats(dev, stats);
 962 }
 963
 964 static void
 965 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 966 {
 967         unsigned int i;
 968
 969         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 970                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 971                 if (txvq == NULL)
 972                         continue;
 973
 974                 txvq->stats.packets = 0;
 975                 txvq->stats.bytes = 0;
 976                 txvq->stats.errors = 0;
 977                 txvq->stats.multicast = 0;
 978                 txvq->stats.broadcast = 0;
 979                 memset(txvq->stats.size_bins, 0,
 980                        sizeof(txvq->stats.size_bins[0]) * 8);
 981         }
 982
 983         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 984                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 985                 if (rxvq == NULL)
 986                         continue;
 987
 988                 rxvq->stats.packets = 0;
 989                 rxvq->stats.bytes = 0;
 990                 rxvq->stats.errors = 0;
 991                 rxvq->stats.multicast = 0;
 992                 rxvq->stats.broadcast = 0;
 993                 memset(rxvq->stats.size_bins, 0,
 994                        sizeof(rxvq->stats.size_bins[0]) * 8);
 995         }
 996 }
 997
 998 static void
 999 virtio_set_hwaddr(struct virtio_hw *hw)
1000 {
1001         vtpci_write_dev_config(hw,
1002                         offsetof(struct virtio_net_config, mac),
1003                         &hw->mac_addr, ETHER_ADDR_LEN);
1004 }
1005
1006 static void
1007 virtio_get_hwaddr(struct virtio_hw *hw)
1008 {
1009         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1010                 vtpci_read_dev_config(hw,
1011                         offsetof(struct virtio_net_config, mac),
1012                         &hw->mac_addr, ETHER_ADDR_LEN);
1013         } else {
1014                 eth_random_addr(&hw->mac_addr[0]);
1015                 virtio_set_hwaddr(hw);
1016         }
1017 }
1018
1019 static void
1020 virtio_mac_table_set(struct virtio_hw *hw,
1021                      const struct virtio_net_ctrl_mac *uc,
1022                      const struct virtio_net_ctrl_mac *mc)
1023 {
1024         struct virtio_pmd_ctrl ctrl;
1025         int err, len[2];
1026
1027         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1028                 PMD_DRV_LOG(INFO, "host does not support mac table");
1029                 return;
1030         }
1031
1032         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1033         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1034
1035         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1036         memcpy(ctrl.data, uc, len[0]);
1037
1038         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1039         memcpy(ctrl.data + len[0], mc, len[1]);
1040
1041         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1042         if (err != 0)
1043                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1044 }
1045
1046 static void
1047 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1048                     uint32_t index, uint32_t vmdq __rte_unused)
1049 {
1050         struct virtio_hw *hw = dev->data->dev_private;
1051         const struct ether_addr *addrs = dev->data->mac_addrs;
1052         unsigned int i;
1053         struct virtio_net_ctrl_mac *uc, *mc;
1054
1055         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1056                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1057                 return;
1058         }
1059
1060         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1061         uc->entries = 0;
1062         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1063         mc->entries = 0;
1064
1065         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1066                 const struct ether_addr *addr
1067                         = (i == index) ? mac_addr : addrs + i;
1068                 struct virtio_net_ctrl_mac *tbl
1069                         = is_multicast_ether_addr(addr) ? mc : uc;
1070
1071                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1072         }
1073
1074         virtio_mac_table_set(hw, uc, mc);
1075 }
1076
1077 static void
1078 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1079 {
1080         struct virtio_hw *hw = dev->data->dev_private;
1081         struct ether_addr *addrs = dev->data->mac_addrs;
1082         struct virtio_net_ctrl_mac *uc, *mc;
1083         unsigned int i;
1084
1085         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1086                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1087                 return;
1088         }
1089
1090         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1091         uc->entries = 0;
1092         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1093         mc->entries = 0;
1094
1095         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1096                 struct virtio_net_ctrl_mac *tbl;
1097
1098                 if (i == index || is_zero_ether_addr(addrs + i))
1099                         continue;
1100
1101                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1102                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1103         }
1104
1105         virtio_mac_table_set(hw, uc, mc);
1106 }
1107
1108 static void
1109 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1110 {
1111         struct virtio_hw *hw = dev->data->dev_private;
1112
1113         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1114
1115         /* Use atomic update if available */
1116         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1117                 struct virtio_pmd_ctrl ctrl;
1118                 int len = ETHER_ADDR_LEN;
1119
1120                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1121                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1122
1123                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1124                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1125         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1126                 virtio_set_hwaddr(hw);
1127 }
1128
1129 static int
1130 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1131 {
1132         struct virtio_hw *hw = dev->data->dev_private;
1133         struct virtio_pmd_ctrl ctrl;
1134         int len;
1135
1136         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1137                 return -ENOTSUP;
1138
1139         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1140         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1141         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1142         len = sizeof(vlan_id);
1143
1144         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1145 }
1146
1147 static int
1148 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1149 {
1150         uint64_t host_features;
1151
1152         /* Prepare guest_features: feature that driver wants to support */
1153         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1154                 req_features);
1155
1156         /* Read device(host) feature bits */
1157         host_features = VTPCI_OPS(hw)->get_features(hw);
1158         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1159                 host_features);
1160
1161         /*
1162          * Negotiate features: Subset of device feature bits are written back
1163          * guest feature bits.
1164          */
1165         hw->guest_features = req_features;
1166         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1167         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1168                 hw->guest_features);
1169
1170         if (hw->modern) {
1171                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1172                         PMD_INIT_LOG(ERR,
1173                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1174                         return -1;
1175                 }
1176                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1177                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1178                         PMD_INIT_LOG(ERR,
1179                                 "failed to set FEATURES_OK status!");
1180                         return -1;
1181                 }
1182         }
1183
1184         hw->req_guest_features = req_features;
1185
1186         return 0;
1187 }
1188
1189 /*
1190  * Process Virtio Config changed interrupt and call the callback
1191  * if link state changed.
1192  */
1193 static void
1194 virtio_interrupt_handler(struct rte_intr_handle *handle,
1195                          void *param)
1196 {
1197         struct rte_eth_dev *dev = param;
1198         struct virtio_hw *hw = dev->data->dev_private;
1199         uint8_t isr;
1200
1201         /* Read interrupt status which clears interrupt */
1202         isr = vtpci_isr(hw);
1203         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1204
1205         if (rte_intr_enable(handle) < 0)
1206                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1207
1208         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1209                 if (virtio_dev_link_update(dev, 0) == 0)
1210                         _rte_eth_dev_callback_process(dev,
1211                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1212         }
1213
1214 }
1215
1216 static void
1217 rx_func_get(struct rte_eth_dev *eth_dev)
1218 {
1219         struct virtio_hw *hw = eth_dev->data->dev_private;
1220         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1221                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1222         else
1223                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1224 }
1225
1226 /* Only support 1:1 queue/interrupt mapping so far.
1227  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1228  * interrupt vectors (<N+1).
1229  */
1230 static int
1231 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1232 {
1233         uint32_t i;
1234         struct virtio_hw *hw = dev->data->dev_private;
1235
1236         PMD_INIT_LOG(INFO, "queue/interrupt binding\n");
1237         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1238                 dev->intr_handle->intr_vec[i] = i + 1;
1239                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1240                                                  VIRTIO_MSI_NO_VECTOR) {
1241                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1242                         return -EBUSY;
1243                 }
1244         }
1245
1246         return 0;
1247 }
1248
1249 static void
1250 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1251 {
1252         uint32_t i;
1253         struct virtio_hw *hw = dev->data->dev_private;
1254
1255         PMD_INIT_LOG(INFO, "queue/interrupt unbinding\n");
1256         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1257                 VTPCI_OPS(hw)->set_queue_irq(hw,
1258                                              hw->vqs[i * VTNET_CQ],
1259                                              VIRTIO_MSI_NO_VECTOR);
1260 }
1261
1262 static int
1263 virtio_configure_intr(struct rte_eth_dev *dev)
1264 {
1265         struct virtio_hw *hw = dev->data->dev_private;
1266
1267         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1268                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1269                 return -ENOTSUP;
1270         }
1271
1272         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1273                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1274                 return -1;
1275         }
1276
1277         if (!dev->intr_handle->intr_vec) {
1278                 dev->intr_handle->intr_vec =
1279                         rte_zmalloc("intr_vec",
1280                                     hw->max_queue_pairs * sizeof(int), 0);
1281                 if (!dev->intr_handle->intr_vec) {
1282                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1283                                      hw->max_queue_pairs);
1284                         return -ENOMEM;
1285                 }
1286         }
1287
1288         /* Re-register callback to update max_intr */
1289         rte_intr_callback_unregister(dev->intr_handle,
1290                                      virtio_interrupt_handler,
1291                                      dev);
1292         rte_intr_callback_register(dev->intr_handle,
1293                                    virtio_interrupt_handler,
1294                                    dev);
1295
1296         /* DO NOT try to remove this! This function will enable msix, or QEMU
1297          * will encounter SIGSEGV when DRIVER_OK is sent.
1298          * And for legacy devices, this should be done before queue/vec binding
1299          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1300          * (22) will be ignored.
1301          */
1302         if (rte_intr_enable(dev->intr_handle) < 0) {
1303                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1304                 return -1;
1305         }
1306
1307         if (virtio_queues_bind_intr(dev) < 0) {
1308                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1309                 return -1;
1310         }
1311
1312         return 0;
1313 }
1314
1315 /* reset device and renegotiate features if needed */
1316 static int
1317 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1318 {
1319         struct virtio_hw *hw = eth_dev->data->dev_private;
1320         struct virtio_net_config *config;
1321         struct virtio_net_config local_config;
1322         struct rte_pci_device *pci_dev = NULL;
1323         int ret;
1324
1325         /* Reset the device although not necessary at startup */
1326         vtpci_reset(hw);
1327
1328         /* Tell the host we've noticed this device. */
1329         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1330
1331         /* Tell the host we've known how to drive the device. */
1332         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1333         if (virtio_negotiate_features(hw, req_features) < 0)
1334                 return -1;
1335
1336         if (eth_dev->device) {
1337                 pci_dev = RTE_DEV_TO_PCI(eth_dev->device);
1338                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1339         }
1340
1341         /* If host does not support status then disable LSC */
1342         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1343                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1344         else
1345                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1346
1347         rx_func_get(eth_dev);
1348
1349         /* Setting up rx_header size for the device */
1350         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1351             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1352                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1353         else
1354                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1355
1356         /* Copy the permanent MAC address to: virtio_hw */
1357         virtio_get_hwaddr(hw);
1358         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1359                         &eth_dev->data->mac_addrs[0]);
1360         PMD_INIT_LOG(DEBUG,
1361                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1362                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1363                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1364
1365         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1366                 config = &local_config;
1367
1368                 vtpci_read_dev_config(hw,
1369                         offsetof(struct virtio_net_config, mac),
1370                         &config->mac, sizeof(config->mac));
1371
1372                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1373                         vtpci_read_dev_config(hw,
1374                                 offsetof(struct virtio_net_config, status),
1375                                 &config->status, sizeof(config->status));
1376                 } else {
1377                         PMD_INIT_LOG(DEBUG,
1378                                      "VIRTIO_NET_F_STATUS is not supported");
1379                         config->status = 0;
1380                 }
1381
1382                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1383                         vtpci_read_dev_config(hw,
1384                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1385                                 &config->max_virtqueue_pairs,
1386                                 sizeof(config->max_virtqueue_pairs));
1387                 } else {
1388                         PMD_INIT_LOG(DEBUG,
1389                                      "VIRTIO_NET_F_MQ is not supported");
1390                         config->max_virtqueue_pairs = 1;
1391                 }
1392
1393                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1394
1395                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1396                                 config->max_virtqueue_pairs);
1397                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1398                 PMD_INIT_LOG(DEBUG,
1399                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1400                                 config->mac[0], config->mac[1],
1401                                 config->mac[2], config->mac[3],
1402                                 config->mac[4], config->mac[5]);
1403         } else {
1404                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1405                 hw->max_queue_pairs = 1;
1406         }
1407
1408         ret = virtio_alloc_queues(eth_dev);
1409         if (ret < 0)
1410                 return ret;
1411
1412         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1413                 if (virtio_configure_intr(eth_dev) < 0) {
1414                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1415                         return -1;
1416                 }
1417         }
1418
1419         vtpci_reinit_complete(hw);
1420
1421         if (pci_dev)
1422                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1423                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1424                         pci_dev->id.device_id);
1425
1426         return 0;
1427 }
1428
1429 /*
1430  * Remap the PCI device again (IO port map for legacy device and
1431  * memory map for modern device), so that the secondary process
1432  * could have the PCI initiated correctly.
1433  */
1434 static int
1435 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1436 {
1437         if (hw->modern) {
1438                 /*
1439                  * We don't have to re-parse the PCI config space, since
1440                  * rte_eal_pci_map_device() makes sure the mapped address
1441                  * in secondary process would equal to the one mapped in
1442                  * the primary process: error will be returned if that
1443                  * requirement is not met.
1444                  *
1445                  * That said, we could simply reuse all cap pointers
1446                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1447                  * primary process, which is stored in shared memory.
1448                  */
1449                 if (rte_eal_pci_map_device(pci_dev)) {
1450                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1451                         return -1;
1452                 }
1453         } else {
1454                 if (rte_eal_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1455                         return -1;
1456         }
1457
1458         return 0;
1459 }
1460
1461 static void
1462 virtio_set_vtpci_ops(struct virtio_hw *hw)
1463 {
1464         if (hw->virtio_user_dev)
1465                 VTPCI_OPS(hw) = &virtio_user_ops;
1466         else if (hw->modern)
1467                 VTPCI_OPS(hw) = &modern_ops;
1468         else
1469                 VTPCI_OPS(hw) = &legacy_ops;
1470 }
1471
1472 /*
1473  * This function is based on probe() function in virtio_pci.c
1474  * It returns 0 on success.
1475  */
1476 int
1477 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1478 {
1479         struct virtio_hw *hw = eth_dev->data->dev_private;
1480         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1481         int ret;
1482
1483         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1484
1485         eth_dev->dev_ops = &virtio_eth_dev_ops;
1486         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1487
1488         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1489                 if (!hw->virtio_user_dev) {
1490                         ret = virtio_remap_pci(RTE_DEV_TO_PCI(eth_dev->device),
1491                                                hw);
1492                         if (ret)
1493                                 return ret;
1494                 }
1495
1496                 virtio_set_vtpci_ops(hw);
1497                 if (hw->use_simple_rxtx) {
1498                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1499                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1500                 } else {
1501                         rx_func_get(eth_dev);
1502                 }
1503                 return 0;
1504         }
1505
1506         /* Allocate memory for storing MAC addresses */
1507         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1508         if (eth_dev->data->mac_addrs == NULL) {
1509                 PMD_INIT_LOG(ERR,
1510                         "Failed to allocate %d bytes needed to store MAC addresses",
1511                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1512                 return -ENOMEM;
1513         }
1514
1515         /* For virtio_user case the hw->virtio_user_dev is populated by
1516          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1517          */
1518         if (!hw->virtio_user_dev) {
1519                 ret = vtpci_init(RTE_DEV_TO_PCI(eth_dev->device), hw,
1520                                  &dev_flags);
1521                 if (ret)
1522                         return ret;
1523         }
1524
1525         hw->port_id = eth_dev->data->port_id;
1526         eth_dev->data->dev_flags = dev_flags;
1527
1528         /* reset device and negotiate default features */
1529         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1530         if (ret < 0)
1531                 return ret;
1532
1533         /* Setup interrupt callback  */
1534         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1535                 rte_intr_callback_register(eth_dev->intr_handle,
1536                         virtio_interrupt_handler, eth_dev);
1537
1538         return 0;
1539 }
1540
1541 static int
1542 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1543 {
1544         PMD_INIT_FUNC_TRACE();
1545
1546         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1547                 return -EPERM;
1548
1549         virtio_dev_stop(eth_dev);
1550         virtio_dev_close(eth_dev);
1551
1552         eth_dev->dev_ops = NULL;
1553         eth_dev->tx_pkt_burst = NULL;
1554         eth_dev->rx_pkt_burst = NULL;
1555
1556         rte_free(eth_dev->data->mac_addrs);
1557         eth_dev->data->mac_addrs = NULL;
1558
1559         /* reset interrupt callback  */
1560         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1561                 rte_intr_callback_unregister(eth_dev->intr_handle,
1562                                                 virtio_interrupt_handler,
1563                                                 eth_dev);
1564         if (eth_dev->device)
1565                 rte_eal_pci_unmap_device(RTE_DEV_TO_PCI(eth_dev->device));
1566
1567         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1568
1569         return 0;
1570 }
1571
1572 static struct eth_driver rte_virtio_pmd = {
1573         .pci_drv = {
1574                 .driver = {
1575                         .name = "net_virtio",
1576                 },
1577                 .id_table = pci_id_virtio_map,
1578                 .drv_flags = 0,
1579                 .probe = rte_eth_dev_pci_probe,
1580                 .remove = rte_eth_dev_pci_remove,
1581         },
1582         .eth_dev_init = eth_virtio_dev_init,
1583         .eth_dev_uninit = eth_virtio_dev_uninit,
1584         .dev_private_size = sizeof(struct virtio_hw),
1585 };
1586
1587 RTE_INIT(rte_virtio_pmd_init);
1588 static void
1589 rte_virtio_pmd_init(void)
1590 {
1591         if (rte_eal_iopl_init() != 0) {
1592                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1593                 return;
1594         }
1595
1596         rte_eal_pci_register(&rte_virtio_pmd.pci_drv);
1597 }
1598
1599 /*
1600  * Configure virtio device
1601  * It returns 0 on success.
1602  */
1603 static int
1604 virtio_dev_configure(struct rte_eth_dev *dev)
1605 {
1606         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1607         struct virtio_hw *hw = dev->data->dev_private;
1608         uint64_t req_features;
1609         int ret;
1610
1611         PMD_INIT_LOG(DEBUG, "configure");
1612         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1613         if (rxmode->hw_ip_checksum)
1614                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1615         if (rxmode->enable_lro)
1616                 req_features |=
1617                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1618                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1619
1620         /* if request features changed, reinit the device */
1621         if (req_features != hw->req_guest_features) {
1622                 ret = virtio_init_device(dev, req_features);
1623                 if (ret < 0)
1624                         return ret;
1625         }
1626
1627         if (rxmode->hw_ip_checksum &&
1628                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1629                 PMD_DRV_LOG(NOTICE,
1630                         "rx ip checksum not available on this host");
1631                 return -ENOTSUP;
1632         }
1633
1634         if (rxmode->enable_lro &&
1635                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1636                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1637                 PMD_DRV_LOG(NOTICE,
1638                         "lro not available on this host");
1639                 return -ENOTSUP;
1640         }
1641
1642         /* start control queue */
1643         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1644                 virtio_dev_cq_start(dev);
1645
1646         hw->vlan_strip = rxmode->hw_vlan_strip;
1647
1648         if (rxmode->hw_vlan_filter
1649             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1650                 PMD_DRV_LOG(NOTICE,
1651                             "vlan filtering not available on this host");
1652                 return -ENOTSUP;
1653         }
1654
1655         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1656                 /* Enable vector (0) for Link State Intrerrupt */
1657                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1658                                 VIRTIO_MSI_NO_VECTOR) {
1659                         PMD_DRV_LOG(ERR, "failed to set config vector");
1660                         return -EBUSY;
1661                 }
1662
1663         return 0;
1664 }
1665
1666
1667 static int
1668 virtio_dev_start(struct rte_eth_dev *dev)
1669 {
1670         uint16_t nb_queues, i;
1671         struct virtnet_rx *rxvq;
1672         struct virtnet_tx *txvq __rte_unused;
1673         struct virtio_hw *hw = dev->data->dev_private;
1674
1675         /* check if lsc interrupt feature is enabled */
1676         if (dev->data->dev_conf.intr_conf.lsc) {
1677                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1678                         PMD_DRV_LOG(ERR, "link status not supported by host");
1679                         return -ENOTSUP;
1680                 }
1681         }
1682
1683         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1684          * in device configure, but it could be unmapped  when device is
1685          * stopped.
1686          */
1687         if (dev->data->dev_conf.intr_conf.lsc ||
1688             dev->data->dev_conf.intr_conf.rxq) {
1689                 rte_intr_disable(dev->intr_handle);
1690
1691                 if (rte_intr_enable(dev->intr_handle) < 0) {
1692                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1693                         return -EIO;
1694                 }
1695         }
1696
1697         /* Initialize Link state */
1698         virtio_dev_link_update(dev, 0);
1699
1700         /*Notify the backend
1701          *Otherwise the tap backend might already stop its queue due to fullness.
1702          *vhost backend will have no chance to be waked up
1703          */
1704         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1705         if (hw->max_queue_pairs > 1) {
1706                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1707                         return -EINVAL;
1708         }
1709
1710         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1711
1712         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1713                 rxvq = dev->data->rx_queues[i];
1714                 virtqueue_notify(rxvq->vq);
1715         }
1716
1717         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1718
1719         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1720                 rxvq = dev->data->rx_queues[i];
1721                 VIRTQUEUE_DUMP(rxvq->vq);
1722         }
1723
1724         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1725                 txvq = dev->data->tx_queues[i];
1726                 VIRTQUEUE_DUMP(txvq->vq);
1727         }
1728
1729         return 0;
1730 }
1731
1732 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1733 {
1734         struct rte_mbuf *buf;
1735         int i, mbuf_num = 0;
1736
1737         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1738                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1739
1740                 PMD_INIT_LOG(DEBUG,
1741                              "Before freeing rxq[%d] used and unused buf", i);
1742                 VIRTQUEUE_DUMP(rxvq->vq);
1743
1744                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1745                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1746                         rte_pktmbuf_free(buf);
1747                         mbuf_num++;
1748                 }
1749
1750                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1751                 PMD_INIT_LOG(DEBUG,
1752                              "After freeing rxq[%d] used and unused buf", i);
1753                 VIRTQUEUE_DUMP(rxvq->vq);
1754         }
1755
1756         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1757                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1758
1759                 PMD_INIT_LOG(DEBUG,
1760                              "Before freeing txq[%d] used and unused bufs",
1761                              i);
1762                 VIRTQUEUE_DUMP(txvq->vq);
1763
1764                 mbuf_num = 0;
1765                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1766                         rte_pktmbuf_free(buf);
1767                         mbuf_num++;
1768                 }
1769
1770                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1771                 PMD_INIT_LOG(DEBUG,
1772                              "After freeing txq[%d] used and unused buf", i);
1773                 VIRTQUEUE_DUMP(txvq->vq);
1774         }
1775 }
1776
1777 /*
1778  * Stop device: disable interrupt and mark link down
1779  */
1780 static void
1781 virtio_dev_stop(struct rte_eth_dev *dev)
1782 {
1783         struct rte_eth_link link;
1784         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1785
1786         PMD_INIT_LOG(DEBUG, "stop");
1787
1788         if (intr_conf->lsc || intr_conf->rxq)
1789                 rte_intr_disable(dev->intr_handle);
1790
1791         memset(&link, 0, sizeof(link));
1792         virtio_dev_atomic_write_link_status(dev, &link);
1793 }
1794
1795 static int
1796 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1797 {
1798         struct rte_eth_link link, old;
1799         uint16_t status;
1800         struct virtio_hw *hw = dev->data->dev_private;
1801         memset(&link, 0, sizeof(link));
1802         virtio_dev_atomic_read_link_status(dev, &link);
1803         old = link;
1804         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1805         link.link_speed  = SPEED_10G;
1806
1807         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1808                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1809                 vtpci_read_dev_config(hw,
1810                                 offsetof(struct virtio_net_config, status),
1811                                 &status, sizeof(status));
1812                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1813                         link.link_status = ETH_LINK_DOWN;
1814                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1815                                      dev->data->port_id);
1816                 } else {
1817                         link.link_status = ETH_LINK_UP;
1818                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1819                                      dev->data->port_id);
1820                 }
1821         } else {
1822                 link.link_status = ETH_LINK_UP;
1823         }
1824         virtio_dev_atomic_write_link_status(dev, &link);
1825
1826         return (old.link_status == link.link_status) ? -1 : 0;
1827 }
1828
1829 static void
1830 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1831 {
1832         uint64_t tso_mask;
1833         struct virtio_hw *hw = dev->data->dev_private;
1834
1835         dev_info->pci_dev = dev->device ? RTE_DEV_TO_PCI(dev->device) : NULL;
1836         dev_info->max_rx_queues =
1837                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1838         dev_info->max_tx_queues =
1839                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1840         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1841         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1842         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1843         dev_info->default_txconf = (struct rte_eth_txconf) {
1844                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1845         };
1846         dev_info->rx_offload_capa =
1847                 DEV_RX_OFFLOAD_TCP_CKSUM |
1848                 DEV_RX_OFFLOAD_UDP_CKSUM |
1849                 DEV_RX_OFFLOAD_TCP_LRO;
1850         dev_info->tx_offload_capa = 0;
1851
1852         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1853                 dev_info->tx_offload_capa |=
1854                         DEV_TX_OFFLOAD_UDP_CKSUM |
1855                         DEV_TX_OFFLOAD_TCP_CKSUM;
1856         }
1857
1858         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1859                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1860         if ((hw->guest_features & tso_mask) == tso_mask)
1861                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1862 }
1863
1864 /*
1865  * It enables testpmd to collect per queue stats.
1866  */
1867 static int
1868 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1869 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1870 __rte_unused uint8_t is_rx)
1871 {
1872         return 0;
1873 }
1874
1875 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1876 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
1877 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio");