drivers/net/virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdint.h>
  35 #include <string.h>
  36 #include <stdio.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39
  40 #include <rte_ethdev.h>
  41 #include <rte_ethdev_pci.h>
  42 #include <rte_memcpy.h>
  43 #include <rte_string_fns.h>
  44 #include <rte_memzone.h>
  45 #include <rte_malloc.h>
  46 #include <rte_atomic.h>
  47 #include <rte_branch_prediction.h>
  48 #include <rte_pci.h>
  49 #include <rte_ether.h>
  50 #include <rte_common.h>
  51 #include <rte_errno.h>
  52
  53 #include <rte_memory.h>
  54 #include <rte_eal.h>
  55 #include <rte_dev.h>
  56
  57 #include "virtio_ethdev.h"
  58 #include "virtio_pci.h"
  59 #include "virtio_logs.h"
  60 #include "virtqueue.h"
  61 #include "virtio_rxtx.h"
  62
  63 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  64 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  65 static int  virtio_dev_start(struct rte_eth_dev *dev);
  66 static void virtio_dev_stop(struct rte_eth_dev *dev);
  67 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  68 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  69 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  70 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  71 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  72                                 struct rte_eth_dev_info *dev_info);
  73 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  74         __rte_unused int wait_to_complete);
  75
  76 static void virtio_set_hwaddr(struct virtio_hw *hw);
  77 static void virtio_get_hwaddr(struct virtio_hw *hw);
  78
  79 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  80                                  struct rte_eth_stats *stats);
  81 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  82                                  struct rte_eth_xstat *xstats, unsigned n);
  83 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
  84                                        struct rte_eth_xstat_name *xstats_names,
  85                                        unsigned limit);
  86 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  87 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  88 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  89                                 uint16_t vlan_id, int on);
  90 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  91                                 struct ether_addr *mac_addr,
  92                                 uint32_t index, uint32_t vmdq __rte_unused);
  93 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  94 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  95                                 struct ether_addr *mac_addr);
  96
  97 static int virtio_dev_queue_stats_mapping_set(
  98         __rte_unused struct rte_eth_dev *eth_dev,
  99         __rte_unused uint16_t queue_id,
 100         __rte_unused uint8_t stat_idx,
 101         __rte_unused uint8_t is_rx);
 102
 103 /*
 104  * The set of PCI devices this driver supports
 105  */
 106 static const struct rte_pci_id pci_id_virtio_map[] = {
 107         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
 108         { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
 109         { .vendor_id = 0, /* sentinel */ },
 110 };
 111
 112 struct rte_virtio_xstats_name_off {
 113         char name[RTE_ETH_XSTATS_NAME_SIZE];
 114         unsigned offset;
 115 };
 116
 117 /* [rt]x_qX_ is prepended to the name string here */
 118 static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
 119         {"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
 120         {"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
 121         {"errors",                 offsetof(struct virtnet_rx, stats.errors)},
 122         {"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
 123         {"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
 124         {"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
 125         {"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
 126         {"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
 127         {"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
 128         {"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
 129         {"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
 130         {"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
 131         {"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
 132 };
 133
 134 /* [rt]x_qX_ is prepended to the name string here */
 135 static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
 136         {"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
 137         {"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
 138         {"errors",                 offsetof(struct virtnet_tx, stats.errors)},
 139         {"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
 140         {"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
 141         {"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
 142         {"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
 143         {"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
 144         {"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
 145         {"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
 146         {"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
 147         {"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
 148         {"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
 149 };
 150
 151 #define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
 152                             sizeof(rte_virtio_rxq_stat_strings[0]))
 153 #define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
 154                             sizeof(rte_virtio_txq_stat_strings[0]))
 155
 156 struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
 157
 158 static int
 159 virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
 160                 int *dlen, int pkt_num)
 161 {
 162         uint32_t head, i;
 163         int k, sum = 0;
 164         virtio_net_ctrl_ack status = ~0;
 165         struct virtio_pmd_ctrl result;
 166         struct virtqueue *vq;
 167
 168         ctrl->status = status;
 169
 170         if (!cvq || !cvq->vq) {
 171                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 172                 return -1;
 173         }
 174         vq = cvq->vq;
 175         head = vq->vq_desc_head_idx;
 176
 177         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 178                 "vq->hw->cvq = %p vq = %p",
 179                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 180
 181         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 182                 return -1;
 183
 184         memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
 185                 sizeof(struct virtio_pmd_ctrl));
 186
 187         /*
 188          * Format is enforced in qemu code:
 189          * One TX packet for header;
 190          * At least one TX packet per argument;
 191          * One RX packet for ACK.
 192          */
 193         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 194         vq->vq_ring.desc[head].addr = cvq->virtio_net_hdr_mem;
 195         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 196         vq->vq_free_cnt--;
 197         i = vq->vq_ring.desc[head].next;
 198
 199         for (k = 0; k < pkt_num; k++) {
 200                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 201                 vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 202                         + sizeof(struct virtio_net_ctrl_hdr)
 203                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 204                 vq->vq_ring.desc[i].len = dlen[k];
 205                 sum += dlen[k];
 206                 vq->vq_free_cnt--;
 207                 i = vq->vq_ring.desc[i].next;
 208         }
 209
 210         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 211         vq->vq_ring.desc[i].addr = cvq->virtio_net_hdr_mem
 212                         + sizeof(struct virtio_net_ctrl_hdr);
 213         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 214         vq->vq_free_cnt--;
 215
 216         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 217
 218         vq_update_avail_ring(vq, head);
 219         vq_update_avail_idx(vq);
 220
 221         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 222
 223         virtqueue_notify(vq);
 224
 225         rte_rmb();
 226         while (VIRTQUEUE_NUSED(vq) == 0) {
 227                 rte_rmb();
 228                 usleep(100);
 229         }
 230
 231         while (VIRTQUEUE_NUSED(vq)) {
 232                 uint32_t idx, desc_idx, used_idx;
 233                 struct vring_used_elem *uep;
 234
 235                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 236                                 & (vq->vq_nentries - 1));
 237                 uep = &vq->vq_ring.used->ring[used_idx];
 238                 idx = (uint32_t) uep->id;
 239                 desc_idx = idx;
 240
 241                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 242                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 243                         vq->vq_free_cnt++;
 244                 }
 245
 246                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 247                 vq->vq_desc_head_idx = idx;
 248
 249                 vq->vq_used_cons_idx++;
 250                 vq->vq_free_cnt++;
 251         }
 252
 253         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 254                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 255
 256         memcpy(&result, cvq->virtio_net_hdr_mz->addr,
 257                         sizeof(struct virtio_pmd_ctrl));
 258
 259         return result.status;
 260 }
 261
 262 static int
 263 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 264 {
 265         struct virtio_hw *hw = dev->data->dev_private;
 266         struct virtio_pmd_ctrl ctrl;
 267         int dlen[1];
 268         int ret;
 269
 270         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 271         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 272         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 273
 274         dlen[0] = sizeof(uint16_t);
 275
 276         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 277         if (ret) {
 278                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 279                           "failed, this is too late now...");
 280                 return -EINVAL;
 281         }
 282
 283         return 0;
 284 }
 285
 286 static void
 287 virtio_dev_queue_release(void *queue __rte_unused)
 288 {
 289         /* do nothing */
 290 }
 291
 292 static int
 293 virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
 294 {
 295         if (vtpci_queue_idx == hw->max_queue_pairs * 2)
 296                 return VTNET_CQ;
 297         else if (vtpci_queue_idx % 2 == 0)
 298                 return VTNET_RQ;
 299         else
 300                 return VTNET_TQ;
 301 }
 302
 303 static uint16_t
 304 virtio_get_nr_vq(struct virtio_hw *hw)
 305 {
 306         uint16_t nr_vq = hw->max_queue_pairs * 2;
 307
 308         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
 309                 nr_vq += 1;
 310
 311         return nr_vq;
 312 }
 313
 314 static void
 315 virtio_init_vring(struct virtqueue *vq)
 316 {
 317         int size = vq->vq_nentries;
 318         struct vring *vr = &vq->vq_ring;
 319         uint8_t *ring_mem = vq->vq_ring_virt_mem;
 320
 321         PMD_INIT_FUNC_TRACE();
 322
 323         /*
 324          * Reinitialise since virtio port might have been stopped and restarted
 325          */
 326         memset(ring_mem, 0, vq->vq_ring_size);
 327         vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN);
 328         vq->vq_used_cons_idx = 0;
 329         vq->vq_desc_head_idx = 0;
 330         vq->vq_avail_idx = 0;
 331         vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
 332         vq->vq_free_cnt = vq->vq_nentries;
 333         memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
 334
 335         vring_desc_init(vr->desc, size);
 336
 337         /*
 338          * Disable device(host) interrupting guest
 339          */
 340         virtqueue_disable_intr(vq);
 341 }
 342
 343 static int
 344 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 345 {
 346         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 347         char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
 348         const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
 349         unsigned int vq_size, size;
 350         struct virtio_hw *hw = dev->data->dev_private;
 351         struct virtnet_rx *rxvq = NULL;
 352         struct virtnet_tx *txvq = NULL;
 353         struct virtnet_ctl *cvq = NULL;
 354         struct virtqueue *vq;
 355         size_t sz_hdr_mz = 0;
 356         void *sw_ring = NULL;
 357         int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
 358         int ret;
 359
 360         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 361
 362         /*
 363          * Read the virtqueue size from the Queue Size field
 364          * Always power of 2 and if 0 virtqueue does not exist
 365          */
 366         vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
 367         PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
 368         if (vq_size == 0) {
 369                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 370                 return -EINVAL;
 371         }
 372
 373         if (!rte_is_power_of_2(vq_size)) {
 374                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 375                 return -EINVAL;
 376         }
 377
 378         snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
 379                  dev->data->port_id, vtpci_queue_idx);
 380
 381         size = RTE_ALIGN_CEIL(sizeof(*vq) +
 382                                 vq_size * sizeof(struct vq_desc_extra),
 383                                 RTE_CACHE_LINE_SIZE);
 384         if (queue_type == VTNET_TQ) {
 385                 /*
 386                  * For each xmit packet, allocate a virtio_net_hdr
 387                  * and indirect ring elements
 388                  */
 389                 sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
 390         } else if (queue_type == VTNET_CQ) {
 391                 /* Allocate a page for control vq command, data and status */
 392                 sz_hdr_mz = PAGE_SIZE;
 393         }
 394
 395         vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
 396                                 SOCKET_ID_ANY);
 397         if (vq == NULL) {
 398                 PMD_INIT_LOG(ERR, "can not allocate vq");
 399                 return -ENOMEM;
 400         }
 401         hw->vqs[vtpci_queue_idx] = vq;
 402
 403         vq->hw = hw;
 404         vq->vq_queue_index = vtpci_queue_idx;
 405         vq->vq_nentries = vq_size;
 406
 407         /*
 408          * Reserve a memzone for vring elements
 409          */
 410         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 411         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 412         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
 413                      size, vq->vq_ring_size);
 414
 415         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 416                                          SOCKET_ID_ANY,
 417                                          0, VIRTIO_PCI_VRING_ALIGN);
 418         if (mz == NULL) {
 419                 if (rte_errno == EEXIST)
 420                         mz = rte_memzone_lookup(vq_name);
 421                 if (mz == NULL) {
 422                         ret = -ENOMEM;
 423                         goto fail_q_alloc;
 424                 }
 425         }
 426
 427         memset(mz->addr, 0, sizeof(mz->len));
 428
 429         vq->vq_ring_mem = mz->phys_addr;
 430         vq->vq_ring_virt_mem = mz->addr;
 431         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
 432                      (uint64_t)mz->phys_addr);
 433         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 434                      (uint64_t)(uintptr_t)mz->addr);
 435
 436         virtio_init_vring(vq);
 437
 438         if (sz_hdr_mz) {
 439                 snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 440                          dev->data->port_id, vtpci_queue_idx);
 441                 hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
 442                                                      SOCKET_ID_ANY, 0,
 443                                                      RTE_CACHE_LINE_SIZE);
 444                 if (hdr_mz == NULL) {
 445                         if (rte_errno == EEXIST)
 446                                 hdr_mz = rte_memzone_lookup(vq_hdr_name);
 447                         if (hdr_mz == NULL) {
 448                                 ret = -ENOMEM;
 449                                 goto fail_q_alloc;
 450                         }
 451                 }
 452         }
 453
 454         if (queue_type == VTNET_RQ) {
 455                 size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 456                                sizeof(vq->sw_ring[0]);
 457
 458                 sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
 459                                 RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 460                 if (!sw_ring) {
 461                         PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
 462                         ret = -ENOMEM;
 463                         goto fail_q_alloc;
 464                 }
 465
 466                 vq->sw_ring = sw_ring;
 467                 rxvq = &vq->rxq;
 468                 rxvq->vq = vq;
 469                 rxvq->port_id = dev->data->port_id;
 470                 rxvq->mz = mz;
 471         } else if (queue_type == VTNET_TQ) {
 472                 txvq = &vq->txq;
 473                 txvq->vq = vq;
 474                 txvq->port_id = dev->data->port_id;
 475                 txvq->mz = mz;
 476                 txvq->virtio_net_hdr_mz = hdr_mz;
 477                 txvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 478         } else if (queue_type == VTNET_CQ) {
 479                 cvq = &vq->cq;
 480                 cvq->vq = vq;
 481                 cvq->mz = mz;
 482                 cvq->virtio_net_hdr_mz = hdr_mz;
 483                 cvq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 484                 memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 485
 486                 hw->cvq = cvq;
 487         }
 488
 489         /* For virtio_user case (that is when hw->dev is NULL), we use
 490          * virtual address. And we need properly set _offset_, please see
 491          * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
 492          */
 493         if (!hw->virtio_user_dev)
 494                 vq->offset = offsetof(struct rte_mbuf, buf_physaddr);
 495         else {
 496                 vq->vq_ring_mem = (uintptr_t)mz->addr;
 497                 vq->offset = offsetof(struct rte_mbuf, buf_addr);
 498                 if (queue_type == VTNET_TQ)
 499                         txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 500                 else if (queue_type == VTNET_CQ)
 501                         cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
 502         }
 503
 504         if (queue_type == VTNET_TQ) {
 505                 struct virtio_tx_region *txr;
 506                 unsigned int i;
 507
 508                 txr = hdr_mz->addr;
 509                 memset(txr, 0, vq_size * sizeof(*txr));
 510                 for (i = 0; i < vq_size; i++) {
 511                         struct vring_desc *start_dp = txr[i].tx_indir;
 512
 513                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 514
 515                         /* first indirect descriptor is always the tx header */
 516                         start_dp->addr = txvq->virtio_net_hdr_mem
 517                                 + i * sizeof(*txr)
 518                                 + offsetof(struct virtio_tx_region, tx_hdr);
 519
 520                         start_dp->len = hw->vtnet_hdr_size;
 521                         start_dp->flags = VRING_DESC_F_NEXT;
 522                 }
 523         }
 524
 525         if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
 526                 PMD_INIT_LOG(ERR, "setup_queue failed");
 527                 return -EINVAL;
 528         }
 529
 530         return 0;
 531
 532 fail_q_alloc:
 533         rte_free(sw_ring);
 534         rte_memzone_free(hdr_mz);
 535         rte_memzone_free(mz);
 536         rte_free(vq);
 537
 538         return ret;
 539 }
 540
 541 static void
 542 virtio_free_queues(struct virtio_hw *hw)
 543 {
 544         uint16_t nr_vq = virtio_get_nr_vq(hw);
 545         struct virtqueue *vq;
 546         int queue_type;
 547         uint16_t i;
 548
 549         for (i = 0; i < nr_vq; i++) {
 550                 vq = hw->vqs[i];
 551                 if (!vq)
 552                         continue;
 553
 554                 queue_type = virtio_get_queue_type(hw, i);
 555                 if (queue_type == VTNET_RQ) {
 556                         rte_free(vq->sw_ring);
 557                         rte_memzone_free(vq->rxq.mz);
 558                 } else if (queue_type == VTNET_TQ) {
 559                         rte_memzone_free(vq->txq.mz);
 560                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 561                 } else {
 562                         rte_memzone_free(vq->cq.mz);
 563                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 564                 }
 565
 566                 rte_free(vq);
 567         }
 568
 569         rte_free(hw->vqs);
 570 }
 571
 572 static int
 573 virtio_alloc_queues(struct rte_eth_dev *dev)
 574 {
 575         struct virtio_hw *hw = dev->data->dev_private;
 576         uint16_t nr_vq = virtio_get_nr_vq(hw);
 577         uint16_t i;
 578         int ret;
 579
 580         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 581         if (!hw->vqs) {
 582                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 583                 return -ENOMEM;
 584         }
 585
 586         for (i = 0; i < nr_vq; i++) {
 587                 ret = virtio_init_queue(dev, i);
 588                 if (ret < 0) {
 589                         virtio_free_queues(hw);
 590                         return ret;
 591                 }
 592         }
 593
 594         return 0;
 595 }
 596
 597 static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
 598
 599 static void
 600 virtio_dev_close(struct rte_eth_dev *dev)
 601 {
 602         struct virtio_hw *hw = dev->data->dev_private;
 603         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
 604
 605         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 606
 607         /* reset the NIC */
 608         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 609                 VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
 610         if (intr_conf->rxq)
 611                 virtio_queues_unbind_intr(dev);
 612
 613         if (intr_conf->lsc || intr_conf->rxq) {
 614                 rte_intr_disable(dev->intr_handle);
 615                 rte_intr_efd_disable(dev->intr_handle);
 616                 rte_free(dev->intr_handle->intr_vec);
 617                 dev->intr_handle->intr_vec = NULL;
 618         }
 619
 620         vtpci_reset(hw);
 621         virtio_dev_free_mbufs(dev);
 622         virtio_free_queues(hw);
 623 }
 624
 625 static void
 626 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 627 {
 628         struct virtio_hw *hw = dev->data->dev_private;
 629         struct virtio_pmd_ctrl ctrl;
 630         int dlen[1];
 631         int ret;
 632
 633         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 634                 PMD_INIT_LOG(INFO, "host does not support rx control");
 635                 return;
 636         }
 637
 638         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 639         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 640         ctrl.data[0] = 1;
 641         dlen[0] = 1;
 642
 643         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 644         if (ret)
 645                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 646 }
 647
 648 static void
 649 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 650 {
 651         struct virtio_hw *hw = dev->data->dev_private;
 652         struct virtio_pmd_ctrl ctrl;
 653         int dlen[1];
 654         int ret;
 655
 656         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 657                 PMD_INIT_LOG(INFO, "host does not support rx control");
 658                 return;
 659         }
 660
 661         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 662         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 663         ctrl.data[0] = 0;
 664         dlen[0] = 1;
 665
 666         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 667         if (ret)
 668                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 669 }
 670
 671 static void
 672 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 673 {
 674         struct virtio_hw *hw = dev->data->dev_private;
 675         struct virtio_pmd_ctrl ctrl;
 676         int dlen[1];
 677         int ret;
 678
 679         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 680                 PMD_INIT_LOG(INFO, "host does not support rx control");
 681                 return;
 682         }
 683
 684         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 685         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 686         ctrl.data[0] = 1;
 687         dlen[0] = 1;
 688
 689         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 690         if (ret)
 691                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 692 }
 693
 694 static void
 695 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 696 {
 697         struct virtio_hw *hw = dev->data->dev_private;
 698         struct virtio_pmd_ctrl ctrl;
 699         int dlen[1];
 700         int ret;
 701
 702         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 703                 PMD_INIT_LOG(INFO, "host does not support rx control");
 704                 return;
 705         }
 706
 707         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 708         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 709         ctrl.data[0] = 0;
 710         dlen[0] = 1;
 711
 712         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 713         if (ret)
 714                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 715 }
 716
 717 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 718 static int
 719 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 720 {
 721         struct virtio_hw *hw = dev->data->dev_private;
 722         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 723                                  hw->vtnet_hdr_size;
 724         uint32_t frame_size = mtu + ether_hdr_len;
 725         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 726
 727         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 728
 729         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 730                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 731                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 732                 return -EINVAL;
 733         }
 734         return 0;
 735 }
 736
 737 static int
 738 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 739 {
 740         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 741         struct virtqueue *vq = rxvq->vq;
 742
 743         virtqueue_enable_intr(vq);
 744         return 0;
 745 }
 746
 747 static int
 748 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 749 {
 750         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 751         struct virtqueue *vq = rxvq->vq;
 752
 753         virtqueue_disable_intr(vq);
 754         return 0;
 755 }
 756
 757 /*
 758  * dev_ops for virtio, bare necessities for basic operation
 759  */
 760 static const struct eth_dev_ops virtio_eth_dev_ops = {
 761         .dev_configure           = virtio_dev_configure,
 762         .dev_start               = virtio_dev_start,
 763         .dev_stop                = virtio_dev_stop,
 764         .dev_close               = virtio_dev_close,
 765         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 766         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 767         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 768         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 769         .mtu_set                 = virtio_mtu_set,
 770         .dev_infos_get           = virtio_dev_info_get,
 771         .stats_get               = virtio_dev_stats_get,
 772         .xstats_get              = virtio_dev_xstats_get,
 773         .xstats_get_names        = virtio_dev_xstats_get_names,
 774         .stats_reset             = virtio_dev_stats_reset,
 775         .xstats_reset            = virtio_dev_stats_reset,
 776         .link_update             = virtio_dev_link_update,
 777         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 778         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 779         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 780         .rx_queue_release        = virtio_dev_queue_release,
 781         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 782         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 783         .tx_queue_release        = virtio_dev_queue_release,
 784         /* collect stats per queue */
 785         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 786         .vlan_filter_set         = virtio_vlan_filter_set,
 787         .mac_addr_add            = virtio_mac_addr_add,
 788         .mac_addr_remove         = virtio_mac_addr_remove,
 789         .mac_addr_set            = virtio_mac_addr_set,
 790 };
 791
 792 static inline int
 793 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 794                                 struct rte_eth_link *link)
 795 {
 796         struct rte_eth_link *dst = link;
 797         struct rte_eth_link *src = &(dev->data->dev_link);
 798
 799         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 800                         *(uint64_t *)src) == 0)
 801                 return -1;
 802
 803         return 0;
 804 }
 805
 806 /**
 807  * Atomically writes the link status information into global
 808  * structure rte_eth_dev.
 809  *
 810  * @param dev
 811  *   - Pointer to the structure rte_eth_dev to read from.
 812  *   - Pointer to the buffer to be saved with the link status.
 813  *
 814  * @return
 815  *   - On success, zero.
 816  *   - On failure, negative value.
 817  */
 818 static inline int
 819 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 820                 struct rte_eth_link *link)
 821 {
 822         struct rte_eth_link *dst = &(dev->data->dev_link);
 823         struct rte_eth_link *src = link;
 824
 825         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 826                                         *(uint64_t *)src) == 0)
 827                 return -1;
 828
 829         return 0;
 830 }
 831
 832 static void
 833 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 834 {
 835         unsigned i;
 836
 837         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 838                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 839                 if (txvq == NULL)
 840                         continue;
 841
 842                 stats->opackets += txvq->stats.packets;
 843                 stats->obytes += txvq->stats.bytes;
 844                 stats->oerrors += txvq->stats.errors;
 845
 846                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 847                         stats->q_opackets[i] = txvq->stats.packets;
 848                         stats->q_obytes[i] = txvq->stats.bytes;
 849                 }
 850         }
 851
 852         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 853                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 854                 if (rxvq == NULL)
 855                         continue;
 856
 857                 stats->ipackets += rxvq->stats.packets;
 858                 stats->ibytes += rxvq->stats.bytes;
 859                 stats->ierrors += rxvq->stats.errors;
 860
 861                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 862                         stats->q_ipackets[i] = rxvq->stats.packets;
 863                         stats->q_ibytes[i] = rxvq->stats.bytes;
 864                 }
 865         }
 866
 867         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 868 }
 869
 870 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 871                                        struct rte_eth_xstat_name *xstats_names,
 872                                        __rte_unused unsigned limit)
 873 {
 874         unsigned i;
 875         unsigned count = 0;
 876         unsigned t;
 877
 878         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 879                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 880
 881         if (xstats_names != NULL) {
 882                 /* Note: limit checked in rte_eth_xstats_names() */
 883
 884                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 885                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 886                         if (rxvq == NULL)
 887                                 continue;
 888                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 889                                 snprintf(xstats_names[count].name,
 890                                         sizeof(xstats_names[count].name),
 891                                         "rx_q%u_%s", i,
 892                                         rte_virtio_rxq_stat_strings[t].name);
 893                                 count++;
 894                         }
 895                 }
 896
 897                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 898                         struct virtqueue *txvq = dev->data->tx_queues[i];
 899                         if (txvq == NULL)
 900                                 continue;
 901                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 902                                 snprintf(xstats_names[count].name,
 903                                         sizeof(xstats_names[count].name),
 904                                         "tx_q%u_%s", i,
 905                                         rte_virtio_txq_stat_strings[t].name);
 906                                 count++;
 907                         }
 908                 }
 909                 return count;
 910         }
 911         return nstats;
 912 }
 913
 914 static int
 915 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 916                       unsigned n)
 917 {
 918         unsigned i;
 919         unsigned count = 0;
 920
 921         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 922                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 923
 924         if (n < nstats)
 925                 return nstats;
 926
 927         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 928                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 929
 930                 if (rxvq == NULL)
 931                         continue;
 932
 933                 unsigned t;
 934
 935                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 936                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 937                                 rte_virtio_rxq_stat_strings[t].offset);
 938                         xstats[count].id = count;
 939                         count++;
 940                 }
 941         }
 942
 943         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 944                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 945
 946                 if (txvq == NULL)
 947                         continue;
 948
 949                 unsigned t;
 950
 951                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 952                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 953                                 rte_virtio_txq_stat_strings[t].offset);
 954                         xstats[count].id = count;
 955                         count++;
 956                 }
 957         }
 958
 959         return count;
 960 }
 961
 962 static void
 963 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 964 {
 965         virtio_update_stats(dev, stats);
 966 }
 967
 968 static void
 969 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 970 {
 971         unsigned int i;
 972
 973         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 974                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 975                 if (txvq == NULL)
 976                         continue;
 977
 978                 txvq->stats.packets = 0;
 979                 txvq->stats.bytes = 0;
 980                 txvq->stats.errors = 0;
 981                 txvq->stats.multicast = 0;
 982                 txvq->stats.broadcast = 0;
 983                 memset(txvq->stats.size_bins, 0,
 984                        sizeof(txvq->stats.size_bins[0]) * 8);
 985         }
 986
 987         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 988                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 989                 if (rxvq == NULL)
 990                         continue;
 991
 992                 rxvq->stats.packets = 0;
 993                 rxvq->stats.bytes = 0;
 994                 rxvq->stats.errors = 0;
 995                 rxvq->stats.multicast = 0;
 996                 rxvq->stats.broadcast = 0;
 997                 memset(rxvq->stats.size_bins, 0,
 998                        sizeof(rxvq->stats.size_bins[0]) * 8);
 999         }
1000 }
1001
1002 static void
1003 virtio_set_hwaddr(struct virtio_hw *hw)
1004 {
1005         vtpci_write_dev_config(hw,
1006                         offsetof(struct virtio_net_config, mac),
1007                         &hw->mac_addr, ETHER_ADDR_LEN);
1008 }
1009
1010 static void
1011 virtio_get_hwaddr(struct virtio_hw *hw)
1012 {
1013         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1014                 vtpci_read_dev_config(hw,
1015                         offsetof(struct virtio_net_config, mac),
1016                         &hw->mac_addr, ETHER_ADDR_LEN);
1017         } else {
1018                 eth_random_addr(&hw->mac_addr[0]);
1019                 virtio_set_hwaddr(hw);
1020         }
1021 }
1022
1023 static void
1024 virtio_mac_table_set(struct virtio_hw *hw,
1025                      const struct virtio_net_ctrl_mac *uc,
1026                      const struct virtio_net_ctrl_mac *mc)
1027 {
1028         struct virtio_pmd_ctrl ctrl;
1029         int err, len[2];
1030
1031         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1032                 PMD_DRV_LOG(INFO, "host does not support mac table");
1033                 return;
1034         }
1035
1036         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1037         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1038
1039         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1040         memcpy(ctrl.data, uc, len[0]);
1041
1042         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1043         memcpy(ctrl.data + len[0], mc, len[1]);
1044
1045         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1046         if (err != 0)
1047                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1048 }
1049
1050 static void
1051 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1052                     uint32_t index, uint32_t vmdq __rte_unused)
1053 {
1054         struct virtio_hw *hw = dev->data->dev_private;
1055         const struct ether_addr *addrs = dev->data->mac_addrs;
1056         unsigned int i;
1057         struct virtio_net_ctrl_mac *uc, *mc;
1058
1059         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1060                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1061                 return;
1062         }
1063
1064         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1065         uc->entries = 0;
1066         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1067         mc->entries = 0;
1068
1069         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1070                 const struct ether_addr *addr
1071                         = (i == index) ? mac_addr : addrs + i;
1072                 struct virtio_net_ctrl_mac *tbl
1073                         = is_multicast_ether_addr(addr) ? mc : uc;
1074
1075                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1076         }
1077
1078         virtio_mac_table_set(hw, uc, mc);
1079 }
1080
1081 static void
1082 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1083 {
1084         struct virtio_hw *hw = dev->data->dev_private;
1085         struct ether_addr *addrs = dev->data->mac_addrs;
1086         struct virtio_net_ctrl_mac *uc, *mc;
1087         unsigned int i;
1088
1089         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1090                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1091                 return;
1092         }
1093
1094         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1095         uc->entries = 0;
1096         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1097         mc->entries = 0;
1098
1099         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1100                 struct virtio_net_ctrl_mac *tbl;
1101
1102                 if (i == index || is_zero_ether_addr(addrs + i))
1103                         continue;
1104
1105                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1106                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1107         }
1108
1109         virtio_mac_table_set(hw, uc, mc);
1110 }
1111
1112 static void
1113 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1114 {
1115         struct virtio_hw *hw = dev->data->dev_private;
1116
1117         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1118
1119         /* Use atomic update if available */
1120         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1121                 struct virtio_pmd_ctrl ctrl;
1122                 int len = ETHER_ADDR_LEN;
1123
1124                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1125                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1126
1127                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1128                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1129         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1130                 virtio_set_hwaddr(hw);
1131 }
1132
1133 static int
1134 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1135 {
1136         struct virtio_hw *hw = dev->data->dev_private;
1137         struct virtio_pmd_ctrl ctrl;
1138         int len;
1139
1140         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1141                 return -ENOTSUP;
1142
1143         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1144         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1145         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1146         len = sizeof(vlan_id);
1147
1148         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1149 }
1150
1151 static int
1152 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1153 {
1154         uint64_t host_features;
1155
1156         /* Prepare guest_features: feature that driver wants to support */
1157         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1158                 req_features);
1159
1160         /* Read device(host) feature bits */
1161         host_features = VTPCI_OPS(hw)->get_features(hw);
1162         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1163                 host_features);
1164
1165         /* If supported, ensure MTU value is valid before acknowledging it. */
1166         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1167                 struct virtio_net_config config;
1168
1169                 vtpci_read_dev_config(hw,
1170                         offsetof(struct virtio_net_config, mtu),
1171                         &config.mtu, sizeof(config.mtu));
1172
1173                 if (config.mtu < ETHER_MIN_MTU)
1174                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1175         }
1176
1177         /*
1178          * Negotiate features: Subset of device feature bits are written back
1179          * guest feature bits.
1180          */
1181         hw->guest_features = req_features;
1182         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1183         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1184                 hw->guest_features);
1185
1186         if (hw->modern) {
1187                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1188                         PMD_INIT_LOG(ERR,
1189                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1190                         return -1;
1191                 }
1192                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1193                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1194                         PMD_INIT_LOG(ERR,
1195                                 "failed to set FEATURES_OK status!");
1196                         return -1;
1197                 }
1198         }
1199
1200         hw->req_guest_features = req_features;
1201
1202         return 0;
1203 }
1204
1205 /*
1206  * Process Virtio Config changed interrupt and call the callback
1207  * if link state changed.
1208  */
1209 void
1210 virtio_interrupt_handler(void *param)
1211 {
1212         struct rte_eth_dev *dev = param;
1213         struct virtio_hw *hw = dev->data->dev_private;
1214         uint8_t isr;
1215
1216         /* Read interrupt status which clears interrupt */
1217         isr = vtpci_isr(hw);
1218         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1219
1220         if (rte_intr_enable(dev->intr_handle) < 0)
1221                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1222
1223         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1224                 if (virtio_dev_link_update(dev, 0) == 0)
1225                         _rte_eth_dev_callback_process(dev,
1226                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1227         }
1228
1229 }
1230
1231 static void
1232 rx_func_get(struct rte_eth_dev *eth_dev)
1233 {
1234         struct virtio_hw *hw = eth_dev->data->dev_private;
1235         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1236                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1237         else
1238                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1239 }
1240
1241 /* Only support 1:1 queue/interrupt mapping so far.
1242  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1243  * interrupt vectors (<N+1).
1244  */
1245 static int
1246 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1247 {
1248         uint32_t i;
1249         struct virtio_hw *hw = dev->data->dev_private;
1250
1251         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1252         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1253                 dev->intr_handle->intr_vec[i] = i + 1;
1254                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1255                                                  VIRTIO_MSI_NO_VECTOR) {
1256                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1257                         return -EBUSY;
1258                 }
1259         }
1260
1261         return 0;
1262 }
1263
1264 static void
1265 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1266 {
1267         uint32_t i;
1268         struct virtio_hw *hw = dev->data->dev_private;
1269
1270         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1271         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1272                 VTPCI_OPS(hw)->set_queue_irq(hw,
1273                                              hw->vqs[i * VTNET_CQ],
1274                                              VIRTIO_MSI_NO_VECTOR);
1275 }
1276
1277 static int
1278 virtio_configure_intr(struct rte_eth_dev *dev)
1279 {
1280         struct virtio_hw *hw = dev->data->dev_private;
1281
1282         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1283                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1284                 return -ENOTSUP;
1285         }
1286
1287         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1288                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1289                 return -1;
1290         }
1291
1292         if (!dev->intr_handle->intr_vec) {
1293                 dev->intr_handle->intr_vec =
1294                         rte_zmalloc("intr_vec",
1295                                     hw->max_queue_pairs * sizeof(int), 0);
1296                 if (!dev->intr_handle->intr_vec) {
1297                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1298                                      hw->max_queue_pairs);
1299                         return -ENOMEM;
1300                 }
1301         }
1302
1303         /* Re-register callback to update max_intr */
1304         rte_intr_callback_unregister(dev->intr_handle,
1305                                      virtio_interrupt_handler,
1306                                      dev);
1307         rte_intr_callback_register(dev->intr_handle,
1308                                    virtio_interrupt_handler,
1309                                    dev);
1310
1311         /* DO NOT try to remove this! This function will enable msix, or QEMU
1312          * will encounter SIGSEGV when DRIVER_OK is sent.
1313          * And for legacy devices, this should be done before queue/vec binding
1314          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1315          * (22) will be ignored.
1316          */
1317         if (rte_intr_enable(dev->intr_handle) < 0) {
1318                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1319                 return -1;
1320         }
1321
1322         if (virtio_queues_bind_intr(dev) < 0) {
1323                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1324                 return -1;
1325         }
1326
1327         return 0;
1328 }
1329
1330 /* reset device and renegotiate features if needed */
1331 static int
1332 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1333 {
1334         struct virtio_hw *hw = eth_dev->data->dev_private;
1335         struct virtio_net_config *config;
1336         struct virtio_net_config local_config;
1337         struct rte_pci_device *pci_dev = NULL;
1338         int ret;
1339
1340         /* Reset the device although not necessary at startup */
1341         vtpci_reset(hw);
1342
1343         /* Tell the host we've noticed this device. */
1344         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1345
1346         /* Tell the host we've known how to drive the device. */
1347         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1348         if (virtio_negotiate_features(hw, req_features) < 0)
1349                 return -1;
1350
1351         if (eth_dev->device) {
1352                 pci_dev = RTE_DEV_TO_PCI(eth_dev->device);
1353                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1354         }
1355
1356         eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
1357         /* If host does not support both status and MSI-X then disable LSC */
1358         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1359                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1360         else
1361                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1362
1363         rx_func_get(eth_dev);
1364
1365         /* Setting up rx_header size for the device */
1366         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1367             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1368                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1369         else
1370                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1371
1372         /* Copy the permanent MAC address to: virtio_hw */
1373         virtio_get_hwaddr(hw);
1374         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1375                         &eth_dev->data->mac_addrs[0]);
1376         PMD_INIT_LOG(DEBUG,
1377                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1378                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1379                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1380
1381         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1382                 config = &local_config;
1383
1384                 vtpci_read_dev_config(hw,
1385                         offsetof(struct virtio_net_config, mac),
1386                         &config->mac, sizeof(config->mac));
1387
1388                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1389                         vtpci_read_dev_config(hw,
1390                                 offsetof(struct virtio_net_config, status),
1391                                 &config->status, sizeof(config->status));
1392                 } else {
1393                         PMD_INIT_LOG(DEBUG,
1394                                      "VIRTIO_NET_F_STATUS is not supported");
1395                         config->status = 0;
1396                 }
1397
1398                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1399                         vtpci_read_dev_config(hw,
1400                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1401                                 &config->max_virtqueue_pairs,
1402                                 sizeof(config->max_virtqueue_pairs));
1403                 } else {
1404                         PMD_INIT_LOG(DEBUG,
1405                                      "VIRTIO_NET_F_MQ is not supported");
1406                         config->max_virtqueue_pairs = 1;
1407                 }
1408
1409                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1410
1411                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1412                         vtpci_read_dev_config(hw,
1413                                 offsetof(struct virtio_net_config, mtu),
1414                                 &config->mtu,
1415                                 sizeof(config->mtu));
1416
1417                         /*
1418                          * MTU value has already been checked at negotiation
1419                          * time, but check again in case it has changed since
1420                          * then, which should not happen.
1421                          */
1422                         if (config->mtu < ETHER_MIN_MTU) {
1423                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1424                                                 config->mtu);
1425                                 return -1;
1426                         }
1427
1428                         hw->max_mtu = config->mtu;
1429                         /* Set initial MTU to maximum one supported by vhost */
1430                         eth_dev->data->mtu = config->mtu;
1431
1432                 } else {
1433                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1434                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1435                 }
1436
1437                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1438                                 config->max_virtqueue_pairs);
1439                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1440                 PMD_INIT_LOG(DEBUG,
1441                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1442                                 config->mac[0], config->mac[1],
1443                                 config->mac[2], config->mac[3],
1444                                 config->mac[4], config->mac[5]);
1445         } else {
1446                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1447                 hw->max_queue_pairs = 1;
1448         }
1449
1450         ret = virtio_alloc_queues(eth_dev);
1451         if (ret < 0)
1452                 return ret;
1453
1454         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1455                 if (virtio_configure_intr(eth_dev) < 0) {
1456                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1457                         return -1;
1458                 }
1459         }
1460
1461         vtpci_reinit_complete(hw);
1462
1463         if (pci_dev)
1464                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1465                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1466                         pci_dev->id.device_id);
1467
1468         return 0;
1469 }
1470
1471 /*
1472  * Remap the PCI device again (IO port map for legacy device and
1473  * memory map for modern device), so that the secondary process
1474  * could have the PCI initiated correctly.
1475  */
1476 static int
1477 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1478 {
1479         if (hw->modern) {
1480                 /*
1481                  * We don't have to re-parse the PCI config space, since
1482                  * rte_eal_pci_map_device() makes sure the mapped address
1483                  * in secondary process would equal to the one mapped in
1484                  * the primary process: error will be returned if that
1485                  * requirement is not met.
1486                  *
1487                  * That said, we could simply reuse all cap pointers
1488                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1489                  * primary process, which is stored in shared memory.
1490                  */
1491                 if (rte_eal_pci_map_device(pci_dev)) {
1492                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1493                         return -1;
1494                 }
1495         } else {
1496                 if (rte_eal_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1497                         return -1;
1498         }
1499
1500         return 0;
1501 }
1502
1503 static void
1504 virtio_set_vtpci_ops(struct virtio_hw *hw)
1505 {
1506 #ifdef RTE_VIRTIO_USER
1507         if (hw->virtio_user_dev)
1508                 VTPCI_OPS(hw) = &virtio_user_ops;
1509         else
1510 #endif
1511         if (hw->modern)
1512                 VTPCI_OPS(hw) = &modern_ops;
1513         else
1514                 VTPCI_OPS(hw) = &legacy_ops;
1515 }
1516
1517 /*
1518  * This function is based on probe() function in virtio_pci.c
1519  * It returns 0 on success.
1520  */
1521 int
1522 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1523 {
1524         struct virtio_hw *hw = eth_dev->data->dev_private;
1525         int ret;
1526
1527         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1528
1529         eth_dev->dev_ops = &virtio_eth_dev_ops;
1530         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1531
1532         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1533                 if (!hw->virtio_user_dev) {
1534                         ret = virtio_remap_pci(RTE_DEV_TO_PCI(eth_dev->device),
1535                                                hw);
1536                         if (ret)
1537                                 return ret;
1538                 }
1539
1540                 virtio_set_vtpci_ops(hw);
1541                 if (hw->use_simple_rxtx) {
1542                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1543                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1544                 } else {
1545                         rx_func_get(eth_dev);
1546                 }
1547                 return 0;
1548         }
1549
1550         /* Allocate memory for storing MAC addresses */
1551         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1552         if (eth_dev->data->mac_addrs == NULL) {
1553                 PMD_INIT_LOG(ERR,
1554                         "Failed to allocate %d bytes needed to store MAC addresses",
1555                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1556                 return -ENOMEM;
1557         }
1558
1559         hw->port_id = eth_dev->data->port_id;
1560         /* For virtio_user case the hw->virtio_user_dev is populated by
1561          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1562          */
1563         if (!hw->virtio_user_dev) {
1564                 ret = vtpci_init(RTE_DEV_TO_PCI(eth_dev->device), hw);
1565                 if (ret)
1566                         return ret;
1567         }
1568
1569         /* reset device and negotiate default features */
1570         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1571         if (ret < 0)
1572                 return ret;
1573
1574         /* Setup interrupt callback  */
1575         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1576                 rte_intr_callback_register(eth_dev->intr_handle,
1577                         virtio_interrupt_handler, eth_dev);
1578
1579         return 0;
1580 }
1581
1582 static int
1583 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1584 {
1585         PMD_INIT_FUNC_TRACE();
1586
1587         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1588                 return -EPERM;
1589
1590         virtio_dev_stop(eth_dev);
1591         virtio_dev_close(eth_dev);
1592
1593         eth_dev->dev_ops = NULL;
1594         eth_dev->tx_pkt_burst = NULL;
1595         eth_dev->rx_pkt_burst = NULL;
1596
1597         rte_free(eth_dev->data->mac_addrs);
1598         eth_dev->data->mac_addrs = NULL;
1599
1600         /* reset interrupt callback  */
1601         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1602                 rte_intr_callback_unregister(eth_dev->intr_handle,
1603                                                 virtio_interrupt_handler,
1604                                                 eth_dev);
1605         if (eth_dev->device)
1606                 rte_eal_pci_unmap_device(RTE_DEV_TO_PCI(eth_dev->device));
1607
1608         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1609
1610         return 0;
1611 }
1612
1613 static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
1614         struct rte_pci_device *pci_dev)
1615 {
1616         return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
1617                 eth_virtio_dev_init);
1618 }
1619
1620 static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
1621 {
1622         return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
1623 }
1624
1625 static struct rte_pci_driver rte_virtio_pmd = {
1626         .driver = {
1627                 .name = "net_virtio",
1628         },
1629         .id_table = pci_id_virtio_map,
1630         .drv_flags = 0,
1631         .probe = eth_virtio_pci_probe,
1632         .remove = eth_virtio_pci_remove,
1633 };
1634
1635 RTE_INIT(rte_virtio_pmd_init);
1636 static void
1637 rte_virtio_pmd_init(void)
1638 {
1639         if (rte_eal_iopl_init() != 0) {
1640                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1641                 return;
1642         }
1643
1644         rte_eal_pci_register(&rte_virtio_pmd);
1645 }
1646
1647 /*
1648  * Configure virtio device
1649  * It returns 0 on success.
1650  */
1651 static int
1652 virtio_dev_configure(struct rte_eth_dev *dev)
1653 {
1654         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1655         struct virtio_hw *hw = dev->data->dev_private;
1656         uint64_t req_features;
1657         int ret;
1658
1659         PMD_INIT_LOG(DEBUG, "configure");
1660         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1661         if (rxmode->hw_ip_checksum)
1662                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1663         if (rxmode->enable_lro)
1664                 req_features |=
1665                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1666                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1667
1668         /* if request features changed, reinit the device */
1669         if (req_features != hw->req_guest_features) {
1670                 ret = virtio_init_device(dev, req_features);
1671                 if (ret < 0)
1672                         return ret;
1673         }
1674
1675         if (rxmode->hw_ip_checksum &&
1676                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1677                 PMD_DRV_LOG(NOTICE,
1678                         "rx ip checksum not available on this host");
1679                 return -ENOTSUP;
1680         }
1681
1682         if (rxmode->enable_lro &&
1683                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1684                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1685                 PMD_DRV_LOG(NOTICE,
1686                         "lro not available on this host");
1687                 return -ENOTSUP;
1688         }
1689
1690         /* start control queue */
1691         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1692                 virtio_dev_cq_start(dev);
1693
1694         hw->vlan_strip = rxmode->hw_vlan_strip;
1695
1696         if (rxmode->hw_vlan_filter
1697             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1698                 PMD_DRV_LOG(NOTICE,
1699                             "vlan filtering not available on this host");
1700                 return -ENOTSUP;
1701         }
1702
1703         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1704                 /* Enable vector (0) for Link State Intrerrupt */
1705                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1706                                 VIRTIO_MSI_NO_VECTOR) {
1707                         PMD_DRV_LOG(ERR, "failed to set config vector");
1708                         return -EBUSY;
1709                 }
1710
1711         return 0;
1712 }
1713
1714
1715 static int
1716 virtio_dev_start(struct rte_eth_dev *dev)
1717 {
1718         uint16_t nb_queues, i;
1719         struct virtnet_rx *rxvq;
1720         struct virtnet_tx *txvq __rte_unused;
1721         struct virtio_hw *hw = dev->data->dev_private;
1722
1723         /* check if lsc interrupt feature is enabled */
1724         if (dev->data->dev_conf.intr_conf.lsc) {
1725                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1726                         PMD_DRV_LOG(ERR, "link status not supported by host");
1727                         return -ENOTSUP;
1728                 }
1729         }
1730
1731         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1732          * in device configure, but it could be unmapped  when device is
1733          * stopped.
1734          */
1735         if (dev->data->dev_conf.intr_conf.lsc ||
1736             dev->data->dev_conf.intr_conf.rxq) {
1737                 rte_intr_disable(dev->intr_handle);
1738
1739                 if (rte_intr_enable(dev->intr_handle) < 0) {
1740                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1741                         return -EIO;
1742                 }
1743         }
1744
1745         /* Initialize Link state */
1746         virtio_dev_link_update(dev, 0);
1747
1748         /*Notify the backend
1749          *Otherwise the tap backend might already stop its queue due to fullness.
1750          *vhost backend will have no chance to be waked up
1751          */
1752         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1753         if (hw->max_queue_pairs > 1) {
1754                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1755                         return -EINVAL;
1756         }
1757
1758         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1759
1760         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1761                 rxvq = dev->data->rx_queues[i];
1762                 virtqueue_notify(rxvq->vq);
1763         }
1764
1765         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1766
1767         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1768                 rxvq = dev->data->rx_queues[i];
1769                 VIRTQUEUE_DUMP(rxvq->vq);
1770         }
1771
1772         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1773                 txvq = dev->data->tx_queues[i];
1774                 VIRTQUEUE_DUMP(txvq->vq);
1775         }
1776         hw->started = 1;
1777
1778         return 0;
1779 }
1780
1781 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1782 {
1783         struct rte_mbuf *buf;
1784         int i, mbuf_num = 0;
1785
1786         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1787                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1788
1789                 PMD_INIT_LOG(DEBUG,
1790                              "Before freeing rxq[%d] used and unused buf", i);
1791                 VIRTQUEUE_DUMP(rxvq->vq);
1792
1793                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1794                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1795                         rte_pktmbuf_free(buf);
1796                         mbuf_num++;
1797                 }
1798
1799                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1800                 PMD_INIT_LOG(DEBUG,
1801                              "After freeing rxq[%d] used and unused buf", i);
1802                 VIRTQUEUE_DUMP(rxvq->vq);
1803         }
1804
1805         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1806                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1807
1808                 PMD_INIT_LOG(DEBUG,
1809                              "Before freeing txq[%d] used and unused bufs",
1810                              i);
1811                 VIRTQUEUE_DUMP(txvq->vq);
1812
1813                 mbuf_num = 0;
1814                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1815                         rte_pktmbuf_free(buf);
1816                         mbuf_num++;
1817                 }
1818
1819                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1820                 PMD_INIT_LOG(DEBUG,
1821                              "After freeing txq[%d] used and unused buf", i);
1822                 VIRTQUEUE_DUMP(txvq->vq);
1823         }
1824 }
1825
1826 /*
1827  * Stop device: disable interrupt and mark link down
1828  */
1829 static void
1830 virtio_dev_stop(struct rte_eth_dev *dev)
1831 {
1832         struct virtio_hw *hw = dev->data->dev_private;
1833         struct rte_eth_link link;
1834         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1835
1836         PMD_INIT_LOG(DEBUG, "stop");
1837
1838         if (intr_conf->lsc || intr_conf->rxq)
1839                 rte_intr_disable(dev->intr_handle);
1840
1841         hw->started = 0;
1842         memset(&link, 0, sizeof(link));
1843         virtio_dev_atomic_write_link_status(dev, &link);
1844 }
1845
1846 static int
1847 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1848 {
1849         struct rte_eth_link link, old;
1850         uint16_t status;
1851         struct virtio_hw *hw = dev->data->dev_private;
1852         memset(&link, 0, sizeof(link));
1853         virtio_dev_atomic_read_link_status(dev, &link);
1854         old = link;
1855         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1856         link.link_speed  = SPEED_10G;
1857
1858         if (hw->started == 0) {
1859                 link.link_status = ETH_LINK_DOWN;
1860         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1861                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1862                 vtpci_read_dev_config(hw,
1863                                 offsetof(struct virtio_net_config, status),
1864                                 &status, sizeof(status));
1865                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1866                         link.link_status = ETH_LINK_DOWN;
1867                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1868                                      dev->data->port_id);
1869                 } else {
1870                         link.link_status = ETH_LINK_UP;
1871                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1872                                      dev->data->port_id);
1873                 }
1874         } else {
1875                 link.link_status = ETH_LINK_UP;
1876         }
1877         virtio_dev_atomic_write_link_status(dev, &link);
1878
1879         return (old.link_status == link.link_status) ? -1 : 0;
1880 }
1881
1882 static void
1883 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1884 {
1885         uint64_t tso_mask, host_features;
1886         struct virtio_hw *hw = dev->data->dev_private;
1887
1888         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1889
1890         dev_info->pci_dev = dev->device ? RTE_DEV_TO_PCI(dev->device) : NULL;
1891         dev_info->max_rx_queues =
1892                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1893         dev_info->max_tx_queues =
1894                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1895         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1896         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1897         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1898         dev_info->default_txconf = (struct rte_eth_txconf) {
1899                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1900         };
1901
1902         host_features = VTPCI_OPS(hw)->get_features(hw);
1903         dev_info->rx_offload_capa = 0;
1904         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
1905                 dev_info->rx_offload_capa |=
1906                         DEV_RX_OFFLOAD_TCP_CKSUM |
1907                         DEV_RX_OFFLOAD_UDP_CKSUM;
1908         }
1909         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1910                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1911         if ((host_features & tso_mask) == tso_mask)
1912                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
1913
1914         dev_info->tx_offload_capa = 0;
1915         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1916                 dev_info->tx_offload_capa |=
1917                         DEV_TX_OFFLOAD_UDP_CKSUM |
1918                         DEV_TX_OFFLOAD_TCP_CKSUM;
1919         }
1920         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1921                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1922         if ((hw->guest_features & tso_mask) == tso_mask)
1923                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1924 }
1925
1926 /*
1927  * It enables testpmd to collect per queue stats.
1928  */
1929 static int
1930 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1931 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1932 __rte_unused uint8_t is_rx)
1933 {
1934         return 0;
1935 }
1936
1937 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1938 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
1939 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio");