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");
 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");
 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");
 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");
 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         uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
 725
 726         max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
 727
 728         if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
 729                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
 730                         ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
 731                 return -EINVAL;
 732         }
 733         return 0;
 734 }
 735
 736 static int
 737 virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 738 {
 739         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 740         struct virtqueue *vq = rxvq->vq;
 741
 742         virtqueue_enable_intr(vq);
 743         return 0;
 744 }
 745
 746 static int
 747 virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
 748 {
 749         struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
 750         struct virtqueue *vq = rxvq->vq;
 751
 752         virtqueue_disable_intr(vq);
 753         return 0;
 754 }
 755
 756 /*
 757  * dev_ops for virtio, bare necessities for basic operation
 758  */
 759 static const struct eth_dev_ops virtio_eth_dev_ops = {
 760         .dev_configure           = virtio_dev_configure,
 761         .dev_start               = virtio_dev_start,
 762         .dev_stop                = virtio_dev_stop,
 763         .dev_close               = virtio_dev_close,
 764         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 765         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 766         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 767         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 768         .mtu_set                 = virtio_mtu_set,
 769         .dev_infos_get           = virtio_dev_info_get,
 770         .stats_get               = virtio_dev_stats_get,
 771         .xstats_get              = virtio_dev_xstats_get,
 772         .xstats_get_names        = virtio_dev_xstats_get_names,
 773         .stats_reset             = virtio_dev_stats_reset,
 774         .xstats_reset            = virtio_dev_stats_reset,
 775         .link_update             = virtio_dev_link_update,
 776         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 777         .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
 778         .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
 779         .rx_queue_release        = virtio_dev_queue_release,
 780         .rx_descriptor_done      = virtio_dev_rx_queue_done,
 781         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 782         .tx_queue_release        = virtio_dev_queue_release,
 783         /* collect stats per queue */
 784         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 785         .vlan_filter_set         = virtio_vlan_filter_set,
 786         .mac_addr_add            = virtio_mac_addr_add,
 787         .mac_addr_remove         = virtio_mac_addr_remove,
 788         .mac_addr_set            = virtio_mac_addr_set,
 789 };
 790
 791 static inline int
 792 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 793                                 struct rte_eth_link *link)
 794 {
 795         struct rte_eth_link *dst = link;
 796         struct rte_eth_link *src = &(dev->data->dev_link);
 797
 798         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 799                         *(uint64_t *)src) == 0)
 800                 return -1;
 801
 802         return 0;
 803 }
 804
 805 /**
 806  * Atomically writes the link status information into global
 807  * structure rte_eth_dev.
 808  *
 809  * @param dev
 810  *   - Pointer to the structure rte_eth_dev to read from.
 811  *   - Pointer to the buffer to be saved with the link status.
 812  *
 813  * @return
 814  *   - On success, zero.
 815  *   - On failure, negative value.
 816  */
 817 static inline int
 818 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 819                 struct rte_eth_link *link)
 820 {
 821         struct rte_eth_link *dst = &(dev->data->dev_link);
 822         struct rte_eth_link *src = link;
 823
 824         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 825                                         *(uint64_t *)src) == 0)
 826                 return -1;
 827
 828         return 0;
 829 }
 830
 831 static void
 832 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 833 {
 834         unsigned i;
 835
 836         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 837                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 838                 if (txvq == NULL)
 839                         continue;
 840
 841                 stats->opackets += txvq->stats.packets;
 842                 stats->obytes += txvq->stats.bytes;
 843                 stats->oerrors += txvq->stats.errors;
 844
 845                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 846                         stats->q_opackets[i] = txvq->stats.packets;
 847                         stats->q_obytes[i] = txvq->stats.bytes;
 848                 }
 849         }
 850
 851         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 852                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 853                 if (rxvq == NULL)
 854                         continue;
 855
 856                 stats->ipackets += rxvq->stats.packets;
 857                 stats->ibytes += rxvq->stats.bytes;
 858                 stats->ierrors += rxvq->stats.errors;
 859
 860                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 861                         stats->q_ipackets[i] = rxvq->stats.packets;
 862                         stats->q_ibytes[i] = rxvq->stats.bytes;
 863                 }
 864         }
 865
 866         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 867 }
 868
 869 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 870                                        struct rte_eth_xstat_name *xstats_names,
 871                                        __rte_unused unsigned limit)
 872 {
 873         unsigned i;
 874         unsigned count = 0;
 875         unsigned t;
 876
 877         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 878                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 879
 880         if (xstats_names != NULL) {
 881                 /* Note: limit checked in rte_eth_xstats_names() */
 882
 883                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 884                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 885                         if (rxvq == NULL)
 886                                 continue;
 887                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 888                                 snprintf(xstats_names[count].name,
 889                                         sizeof(xstats_names[count].name),
 890                                         "rx_q%u_%s", i,
 891                                         rte_virtio_rxq_stat_strings[t].name);
 892                                 count++;
 893                         }
 894                 }
 895
 896                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 897                         struct virtqueue *txvq = dev->data->tx_queues[i];
 898                         if (txvq == NULL)
 899                                 continue;
 900                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 901                                 snprintf(xstats_names[count].name,
 902                                         sizeof(xstats_names[count].name),
 903                                         "tx_q%u_%s", i,
 904                                         rte_virtio_txq_stat_strings[t].name);
 905                                 count++;
 906                         }
 907                 }
 908                 return count;
 909         }
 910         return nstats;
 911 }
 912
 913 static int
 914 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 915                       unsigned n)
 916 {
 917         unsigned i;
 918         unsigned count = 0;
 919
 920         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 921                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 922
 923         if (n < nstats)
 924                 return nstats;
 925
 926         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 927                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 928
 929                 if (rxvq == NULL)
 930                         continue;
 931
 932                 unsigned t;
 933
 934                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 935                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 936                                 rte_virtio_rxq_stat_strings[t].offset);
 937                         xstats[count].id = count;
 938                         count++;
 939                 }
 940         }
 941
 942         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 943                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 944
 945                 if (txvq == NULL)
 946                         continue;
 947
 948                 unsigned t;
 949
 950                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 951                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 952                                 rte_virtio_txq_stat_strings[t].offset);
 953                         xstats[count].id = count;
 954                         count++;
 955                 }
 956         }
 957
 958         return count;
 959 }
 960
 961 static void
 962 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 963 {
 964         virtio_update_stats(dev, stats);
 965 }
 966
 967 static void
 968 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 969 {
 970         unsigned int i;
 971
 972         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 973                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 974                 if (txvq == NULL)
 975                         continue;
 976
 977                 txvq->stats.packets = 0;
 978                 txvq->stats.bytes = 0;
 979                 txvq->stats.errors = 0;
 980                 txvq->stats.multicast = 0;
 981                 txvq->stats.broadcast = 0;
 982                 memset(txvq->stats.size_bins, 0,
 983                        sizeof(txvq->stats.size_bins[0]) * 8);
 984         }
 985
 986         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 987                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 988                 if (rxvq == NULL)
 989                         continue;
 990
 991                 rxvq->stats.packets = 0;
 992                 rxvq->stats.bytes = 0;
 993                 rxvq->stats.errors = 0;
 994                 rxvq->stats.multicast = 0;
 995                 rxvq->stats.broadcast = 0;
 996                 memset(rxvq->stats.size_bins, 0,
 997                        sizeof(rxvq->stats.size_bins[0]) * 8);
 998         }
 999 }
1000
1001 static void
1002 virtio_set_hwaddr(struct virtio_hw *hw)
1003 {
1004         vtpci_write_dev_config(hw,
1005                         offsetof(struct virtio_net_config, mac),
1006                         &hw->mac_addr, ETHER_ADDR_LEN);
1007 }
1008
1009 static void
1010 virtio_get_hwaddr(struct virtio_hw *hw)
1011 {
1012         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
1013                 vtpci_read_dev_config(hw,
1014                         offsetof(struct virtio_net_config, mac),
1015                         &hw->mac_addr, ETHER_ADDR_LEN);
1016         } else {
1017                 eth_random_addr(&hw->mac_addr[0]);
1018                 virtio_set_hwaddr(hw);
1019         }
1020 }
1021
1022 static void
1023 virtio_mac_table_set(struct virtio_hw *hw,
1024                      const struct virtio_net_ctrl_mac *uc,
1025                      const struct virtio_net_ctrl_mac *mc)
1026 {
1027         struct virtio_pmd_ctrl ctrl;
1028         int err, len[2];
1029
1030         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1031                 PMD_DRV_LOG(INFO, "host does not support mac table");
1032                 return;
1033         }
1034
1035         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1036         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1037
1038         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1039         memcpy(ctrl.data, uc, len[0]);
1040
1041         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1042         memcpy(ctrl.data + len[0], mc, len[1]);
1043
1044         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1045         if (err != 0)
1046                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1047 }
1048
1049 static void
1050 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1051                     uint32_t index, uint32_t vmdq __rte_unused)
1052 {
1053         struct virtio_hw *hw = dev->data->dev_private;
1054         const struct ether_addr *addrs = dev->data->mac_addrs;
1055         unsigned int i;
1056         struct virtio_net_ctrl_mac *uc, *mc;
1057
1058         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1059                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1060                 return;
1061         }
1062
1063         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1064         uc->entries = 0;
1065         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1066         mc->entries = 0;
1067
1068         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1069                 const struct ether_addr *addr
1070                         = (i == index) ? mac_addr : addrs + i;
1071                 struct virtio_net_ctrl_mac *tbl
1072                         = is_multicast_ether_addr(addr) ? mc : uc;
1073
1074                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1075         }
1076
1077         virtio_mac_table_set(hw, uc, mc);
1078 }
1079
1080 static void
1081 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1082 {
1083         struct virtio_hw *hw = dev->data->dev_private;
1084         struct ether_addr *addrs = dev->data->mac_addrs;
1085         struct virtio_net_ctrl_mac *uc, *mc;
1086         unsigned int i;
1087
1088         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1089                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1090                 return;
1091         }
1092
1093         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1094         uc->entries = 0;
1095         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1096         mc->entries = 0;
1097
1098         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1099                 struct virtio_net_ctrl_mac *tbl;
1100
1101                 if (i == index || is_zero_ether_addr(addrs + i))
1102                         continue;
1103
1104                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1105                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1106         }
1107
1108         virtio_mac_table_set(hw, uc, mc);
1109 }
1110
1111 static void
1112 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1113 {
1114         struct virtio_hw *hw = dev->data->dev_private;
1115
1116         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1117
1118         /* Use atomic update if available */
1119         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1120                 struct virtio_pmd_ctrl ctrl;
1121                 int len = ETHER_ADDR_LEN;
1122
1123                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1124                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1125
1126                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1127                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1128         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1129                 virtio_set_hwaddr(hw);
1130 }
1131
1132 static int
1133 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1134 {
1135         struct virtio_hw *hw = dev->data->dev_private;
1136         struct virtio_pmd_ctrl ctrl;
1137         int len;
1138
1139         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1140                 return -ENOTSUP;
1141
1142         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1143         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1144         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1145         len = sizeof(vlan_id);
1146
1147         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1148 }
1149
1150 static int
1151 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1152 {
1153         uint64_t host_features;
1154
1155         /* Prepare guest_features: feature that driver wants to support */
1156         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1157                 req_features);
1158
1159         /* Read device(host) feature bits */
1160         host_features = VTPCI_OPS(hw)->get_features(hw);
1161         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1162                 host_features);
1163
1164         /* If supported, ensure MTU value is valid before acknowledging it. */
1165         if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
1166                 struct virtio_net_config config;
1167
1168                 vtpci_read_dev_config(hw,
1169                         offsetof(struct virtio_net_config, mtu),
1170                         &config.mtu, sizeof(config.mtu));
1171
1172                 if (config.mtu < ETHER_MIN_MTU)
1173                         req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
1174         }
1175
1176         /*
1177          * Negotiate features: Subset of device feature bits are written back
1178          * guest feature bits.
1179          */
1180         hw->guest_features = req_features;
1181         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1182         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1183                 hw->guest_features);
1184
1185         if (hw->modern) {
1186                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1187                         PMD_INIT_LOG(ERR,
1188                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1189                         return -1;
1190                 }
1191                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1192                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1193                         PMD_INIT_LOG(ERR,
1194                                 "failed to set FEATURES_OK status!");
1195                         return -1;
1196                 }
1197         }
1198
1199         hw->req_guest_features = req_features;
1200
1201         return 0;
1202 }
1203
1204 /*
1205  * Process Virtio Config changed interrupt and call the callback
1206  * if link state changed.
1207  */
1208 void
1209 virtio_interrupt_handler(void *param)
1210 {
1211         struct rte_eth_dev *dev = param;
1212         struct virtio_hw *hw = dev->data->dev_private;
1213         uint8_t isr;
1214
1215         /* Read interrupt status which clears interrupt */
1216         isr = vtpci_isr(hw);
1217         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1218
1219         if (rte_intr_enable(dev->intr_handle) < 0)
1220                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1221
1222         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1223                 if (virtio_dev_link_update(dev, 0) == 0)
1224                         _rte_eth_dev_callback_process(dev,
1225                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1226         }
1227
1228 }
1229
1230 static void
1231 rx_func_get(struct rte_eth_dev *eth_dev)
1232 {
1233         struct virtio_hw *hw = eth_dev->data->dev_private;
1234         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1235                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1236         else
1237                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1238 }
1239
1240 /* Only support 1:1 queue/interrupt mapping so far.
1241  * TODO: support n:1 queue/interrupt mapping when there are limited number of
1242  * interrupt vectors (<N+1).
1243  */
1244 static int
1245 virtio_queues_bind_intr(struct rte_eth_dev *dev)
1246 {
1247         uint32_t i;
1248         struct virtio_hw *hw = dev->data->dev_private;
1249
1250         PMD_INIT_LOG(INFO, "queue/interrupt binding");
1251         for (i = 0; i < dev->data->nb_rx_queues; ++i) {
1252                 dev->intr_handle->intr_vec[i] = i + 1;
1253                 if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
1254                                                  VIRTIO_MSI_NO_VECTOR) {
1255                         PMD_DRV_LOG(ERR, "failed to set queue vector");
1256                         return -EBUSY;
1257                 }
1258         }
1259
1260         return 0;
1261 }
1262
1263 static void
1264 virtio_queues_unbind_intr(struct rte_eth_dev *dev)
1265 {
1266         uint32_t i;
1267         struct virtio_hw *hw = dev->data->dev_private;
1268
1269         PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
1270         for (i = 0; i < dev->data->nb_rx_queues; ++i)
1271                 VTPCI_OPS(hw)->set_queue_irq(hw,
1272                                              hw->vqs[i * VTNET_CQ],
1273                                              VIRTIO_MSI_NO_VECTOR);
1274 }
1275
1276 static int
1277 virtio_configure_intr(struct rte_eth_dev *dev)
1278 {
1279         struct virtio_hw *hw = dev->data->dev_private;
1280
1281         if (!rte_intr_cap_multiple(dev->intr_handle)) {
1282                 PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
1283                 return -ENOTSUP;
1284         }
1285
1286         if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
1287                 PMD_INIT_LOG(ERR, "Fail to create eventfd");
1288                 return -1;
1289         }
1290
1291         if (!dev->intr_handle->intr_vec) {
1292                 dev->intr_handle->intr_vec =
1293                         rte_zmalloc("intr_vec",
1294                                     hw->max_queue_pairs * sizeof(int), 0);
1295                 if (!dev->intr_handle->intr_vec) {
1296                         PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
1297                                      hw->max_queue_pairs);
1298                         return -ENOMEM;
1299                 }
1300         }
1301
1302         /* Re-register callback to update max_intr */
1303         rte_intr_callback_unregister(dev->intr_handle,
1304                                      virtio_interrupt_handler,
1305                                      dev);
1306         rte_intr_callback_register(dev->intr_handle,
1307                                    virtio_interrupt_handler,
1308                                    dev);
1309
1310         /* DO NOT try to remove this! This function will enable msix, or QEMU
1311          * will encounter SIGSEGV when DRIVER_OK is sent.
1312          * And for legacy devices, this should be done before queue/vec binding
1313          * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
1314          * (22) will be ignored.
1315          */
1316         if (rte_intr_enable(dev->intr_handle) < 0) {
1317                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1318                 return -1;
1319         }
1320
1321         if (virtio_queues_bind_intr(dev) < 0) {
1322                 PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
1323                 return -1;
1324         }
1325
1326         return 0;
1327 }
1328
1329 /* reset device and renegotiate features if needed */
1330 static int
1331 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1332 {
1333         struct virtio_hw *hw = eth_dev->data->dev_private;
1334         struct virtio_net_config *config;
1335         struct virtio_net_config local_config;
1336         struct rte_pci_device *pci_dev = NULL;
1337         int ret;
1338
1339         /* Reset the device although not necessary at startup */
1340         vtpci_reset(hw);
1341
1342         /* Tell the host we've noticed this device. */
1343         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1344
1345         /* Tell the host we've known how to drive the device. */
1346         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1347         if (virtio_negotiate_features(hw, req_features) < 0)
1348                 return -1;
1349
1350         if (eth_dev->device) {
1351                 pci_dev = RTE_DEV_TO_PCI(eth_dev->device);
1352                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1353         }
1354
1355         /* If host does not support both status and MSI-X then disable LSC */
1356         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1357                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1358         else
1359                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1360
1361         rx_func_get(eth_dev);
1362
1363         /* Setting up rx_header size for the device */
1364         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1365             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1366                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1367         else
1368                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1369
1370         /* Copy the permanent MAC address to: virtio_hw */
1371         virtio_get_hwaddr(hw);
1372         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1373                         &eth_dev->data->mac_addrs[0]);
1374         PMD_INIT_LOG(DEBUG,
1375                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1376                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1377                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1378
1379         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1380                 config = &local_config;
1381
1382                 vtpci_read_dev_config(hw,
1383                         offsetof(struct virtio_net_config, mac),
1384                         &config->mac, sizeof(config->mac));
1385
1386                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1387                         vtpci_read_dev_config(hw,
1388                                 offsetof(struct virtio_net_config, status),
1389                                 &config->status, sizeof(config->status));
1390                 } else {
1391                         PMD_INIT_LOG(DEBUG,
1392                                      "VIRTIO_NET_F_STATUS is not supported");
1393                         config->status = 0;
1394                 }
1395
1396                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1397                         vtpci_read_dev_config(hw,
1398                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1399                                 &config->max_virtqueue_pairs,
1400                                 sizeof(config->max_virtqueue_pairs));
1401                 } else {
1402                         PMD_INIT_LOG(DEBUG,
1403                                      "VIRTIO_NET_F_MQ is not supported");
1404                         config->max_virtqueue_pairs = 1;
1405                 }
1406
1407                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1408
1409                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
1410                         vtpci_read_dev_config(hw,
1411                                 offsetof(struct virtio_net_config, mtu),
1412                                 &config->mtu,
1413                                 sizeof(config->mtu));
1414
1415                         /*
1416                          * MTU value has already been checked at negotiation
1417                          * time, but check again in case it has changed since
1418                          * then, which should not happen.
1419                          */
1420                         if (config->mtu < ETHER_MIN_MTU) {
1421                                 PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
1422                                                 config->mtu);
1423                                 return -1;
1424                         }
1425
1426                         hw->max_mtu = config->mtu;
1427                         /* Set initial MTU to maximum one supported by vhost */
1428                         eth_dev->data->mtu = config->mtu;
1429
1430                 } else {
1431                         hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
1432                                 VLAN_TAG_LEN - hw->vtnet_hdr_size;
1433                 }
1434
1435                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1436                                 config->max_virtqueue_pairs);
1437                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1438                 PMD_INIT_LOG(DEBUG,
1439                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1440                                 config->mac[0], config->mac[1],
1441                                 config->mac[2], config->mac[3],
1442                                 config->mac[4], config->mac[5]);
1443         } else {
1444                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1445                 hw->max_queue_pairs = 1;
1446         }
1447
1448         ret = virtio_alloc_queues(eth_dev);
1449         if (ret < 0)
1450                 return ret;
1451
1452         if (eth_dev->data->dev_conf.intr_conf.rxq) {
1453                 if (virtio_configure_intr(eth_dev) < 0) {
1454                         PMD_INIT_LOG(ERR, "failed to configure interrupt");
1455                         return -1;
1456                 }
1457         }
1458
1459         vtpci_reinit_complete(hw);
1460
1461         if (pci_dev)
1462                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1463                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1464                         pci_dev->id.device_id);
1465
1466         return 0;
1467 }
1468
1469 /*
1470  * Remap the PCI device again (IO port map for legacy device and
1471  * memory map for modern device), so that the secondary process
1472  * could have the PCI initiated correctly.
1473  */
1474 static int
1475 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1476 {
1477         if (hw->modern) {
1478                 /*
1479                  * We don't have to re-parse the PCI config space, since
1480                  * rte_eal_pci_map_device() makes sure the mapped address
1481                  * in secondary process would equal to the one mapped in
1482                  * the primary process: error will be returned if that
1483                  * requirement is not met.
1484                  *
1485                  * That said, we could simply reuse all cap pointers
1486                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1487                  * primary process, which is stored in shared memory.
1488                  */
1489                 if (rte_eal_pci_map_device(pci_dev)) {
1490                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1491                         return -1;
1492                 }
1493         } else {
1494                 if (rte_eal_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1495                         return -1;
1496         }
1497
1498         return 0;
1499 }
1500
1501 static void
1502 virtio_set_vtpci_ops(struct virtio_hw *hw)
1503 {
1504 #ifdef RTE_VIRTIO_USER
1505         if (hw->virtio_user_dev)
1506                 VTPCI_OPS(hw) = &virtio_user_ops;
1507         else
1508 #endif
1509         if (hw->modern)
1510                 VTPCI_OPS(hw) = &modern_ops;
1511         else
1512                 VTPCI_OPS(hw) = &legacy_ops;
1513 }
1514
1515 /*
1516  * This function is based on probe() function in virtio_pci.c
1517  * It returns 0 on success.
1518  */
1519 int
1520 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1521 {
1522         struct virtio_hw *hw = eth_dev->data->dev_private;
1523         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1524         int ret;
1525
1526         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1527
1528         eth_dev->dev_ops = &virtio_eth_dev_ops;
1529         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1530
1531         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1532                 if (!hw->virtio_user_dev) {
1533                         ret = virtio_remap_pci(RTE_DEV_TO_PCI(eth_dev->device),
1534                                                hw);
1535                         if (ret)
1536                                 return ret;
1537                 }
1538
1539                 virtio_set_vtpci_ops(hw);
1540                 if (hw->use_simple_rxtx) {
1541                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1542                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1543                 } else {
1544                         rx_func_get(eth_dev);
1545                 }
1546                 return 0;
1547         }
1548
1549         /* Allocate memory for storing MAC addresses */
1550         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1551         if (eth_dev->data->mac_addrs == NULL) {
1552                 PMD_INIT_LOG(ERR,
1553                         "Failed to allocate %d bytes needed to store MAC addresses",
1554                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1555                 return -ENOMEM;
1556         }
1557
1558         hw->port_id = eth_dev->data->port_id;
1559         /* For virtio_user case the hw->virtio_user_dev is populated by
1560          * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
1561          */
1562         if (!hw->virtio_user_dev) {
1563                 ret = vtpci_init(RTE_DEV_TO_PCI(eth_dev->device), hw,
1564                                  &dev_flags);
1565                 if (ret)
1566                         return ret;
1567         }
1568
1569         eth_dev->data->dev_flags = dev_flags;
1570
1571         /* reset device and negotiate default features */
1572         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1573         if (ret < 0)
1574                 return ret;
1575
1576         /* Setup interrupt callback  */
1577         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1578                 rte_intr_callback_register(eth_dev->intr_handle,
1579                         virtio_interrupt_handler, eth_dev);
1580
1581         return 0;
1582 }
1583
1584 static int
1585 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1586 {
1587         PMD_INIT_FUNC_TRACE();
1588
1589         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1590                 return -EPERM;
1591
1592         virtio_dev_stop(eth_dev);
1593         virtio_dev_close(eth_dev);
1594
1595         eth_dev->dev_ops = NULL;
1596         eth_dev->tx_pkt_burst = NULL;
1597         eth_dev->rx_pkt_burst = NULL;
1598
1599         rte_free(eth_dev->data->mac_addrs);
1600         eth_dev->data->mac_addrs = NULL;
1601
1602         /* reset interrupt callback  */
1603         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1604                 rte_intr_callback_unregister(eth_dev->intr_handle,
1605                                                 virtio_interrupt_handler,
1606                                                 eth_dev);
1607         if (eth_dev->device)
1608                 rte_eal_pci_unmap_device(RTE_DEV_TO_PCI(eth_dev->device));
1609
1610         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1611
1612         return 0;
1613 }
1614
1615 static struct eth_driver rte_virtio_pmd = {
1616         .pci_drv = {
1617                 .driver = {
1618                         .name = "net_virtio",
1619                 },
1620                 .id_table = pci_id_virtio_map,
1621                 .drv_flags = 0,
1622                 .probe = rte_eth_dev_pci_probe,
1623                 .remove = rte_eth_dev_pci_remove,
1624         },
1625         .eth_dev_init = eth_virtio_dev_init,
1626         .eth_dev_uninit = eth_virtio_dev_uninit,
1627         .dev_private_size = sizeof(struct virtio_hw),
1628 };
1629
1630 RTE_INIT(rte_virtio_pmd_init);
1631 static void
1632 rte_virtio_pmd_init(void)
1633 {
1634         if (rte_eal_iopl_init() != 0) {
1635                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1636                 return;
1637         }
1638
1639         rte_eal_pci_register(&rte_virtio_pmd.pci_drv);
1640 }
1641
1642 /*
1643  * Configure virtio device
1644  * It returns 0 on success.
1645  */
1646 static int
1647 virtio_dev_configure(struct rte_eth_dev *dev)
1648 {
1649         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1650         struct virtio_hw *hw = dev->data->dev_private;
1651         uint64_t req_features;
1652         int ret;
1653
1654         PMD_INIT_LOG(DEBUG, "configure");
1655         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1656         if (rxmode->hw_ip_checksum)
1657                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1658         if (rxmode->enable_lro)
1659                 req_features |=
1660                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1661                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1662
1663         /* if request features changed, reinit the device */
1664         if (req_features != hw->req_guest_features) {
1665                 ret = virtio_init_device(dev, req_features);
1666                 if (ret < 0)
1667                         return ret;
1668         }
1669
1670         if (rxmode->hw_ip_checksum &&
1671                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1672                 PMD_DRV_LOG(NOTICE,
1673                         "rx ip checksum not available on this host");
1674                 return -ENOTSUP;
1675         }
1676
1677         if (rxmode->enable_lro &&
1678                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1679                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1680                 PMD_DRV_LOG(NOTICE,
1681                         "lro not available on this host");
1682                 return -ENOTSUP;
1683         }
1684
1685         /* start control queue */
1686         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1687                 virtio_dev_cq_start(dev);
1688
1689         hw->vlan_strip = rxmode->hw_vlan_strip;
1690
1691         if (rxmode->hw_vlan_filter
1692             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1693                 PMD_DRV_LOG(NOTICE,
1694                             "vlan filtering not available on this host");
1695                 return -ENOTSUP;
1696         }
1697
1698         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1699                 /* Enable vector (0) for Link State Intrerrupt */
1700                 if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
1701                                 VIRTIO_MSI_NO_VECTOR) {
1702                         PMD_DRV_LOG(ERR, "failed to set config vector");
1703                         return -EBUSY;
1704                 }
1705
1706         return 0;
1707 }
1708
1709
1710 static int
1711 virtio_dev_start(struct rte_eth_dev *dev)
1712 {
1713         uint16_t nb_queues, i;
1714         struct virtnet_rx *rxvq;
1715         struct virtnet_tx *txvq __rte_unused;
1716         struct virtio_hw *hw = dev->data->dev_private;
1717
1718         /* check if lsc interrupt feature is enabled */
1719         if (dev->data->dev_conf.intr_conf.lsc) {
1720                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1721                         PMD_DRV_LOG(ERR, "link status not supported by host");
1722                         return -ENOTSUP;
1723                 }
1724         }
1725
1726         /* Enable uio/vfio intr/eventfd mapping: althrough we already did that
1727          * in device configure, but it could be unmapped  when device is
1728          * stopped.
1729          */
1730         if (dev->data->dev_conf.intr_conf.lsc ||
1731             dev->data->dev_conf.intr_conf.rxq) {
1732                 rte_intr_disable(dev->intr_handle);
1733
1734                 if (rte_intr_enable(dev->intr_handle) < 0) {
1735                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1736                         return -EIO;
1737                 }
1738         }
1739
1740         /* Initialize Link state */
1741         virtio_dev_link_update(dev, 0);
1742
1743         /*Notify the backend
1744          *Otherwise the tap backend might already stop its queue due to fullness.
1745          *vhost backend will have no chance to be waked up
1746          */
1747         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1748         if (hw->max_queue_pairs > 1) {
1749                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1750                         return -EINVAL;
1751         }
1752
1753         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1754
1755         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1756                 rxvq = dev->data->rx_queues[i];
1757                 virtqueue_notify(rxvq->vq);
1758         }
1759
1760         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1761
1762         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1763                 rxvq = dev->data->rx_queues[i];
1764                 VIRTQUEUE_DUMP(rxvq->vq);
1765         }
1766
1767         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1768                 txvq = dev->data->tx_queues[i];
1769                 VIRTQUEUE_DUMP(txvq->vq);
1770         }
1771
1772         return 0;
1773 }
1774
1775 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1776 {
1777         struct rte_mbuf *buf;
1778         int i, mbuf_num = 0;
1779
1780         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1781                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1782
1783                 PMD_INIT_LOG(DEBUG,
1784                              "Before freeing rxq[%d] used and unused buf", i);
1785                 VIRTQUEUE_DUMP(rxvq->vq);
1786
1787                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1788                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1789                         rte_pktmbuf_free(buf);
1790                         mbuf_num++;
1791                 }
1792
1793                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1794                 PMD_INIT_LOG(DEBUG,
1795                              "After freeing rxq[%d] used and unused buf", i);
1796                 VIRTQUEUE_DUMP(rxvq->vq);
1797         }
1798
1799         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1800                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1801
1802                 PMD_INIT_LOG(DEBUG,
1803                              "Before freeing txq[%d] used and unused bufs",
1804                              i);
1805                 VIRTQUEUE_DUMP(txvq->vq);
1806
1807                 mbuf_num = 0;
1808                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1809                         rte_pktmbuf_free(buf);
1810                         mbuf_num++;
1811                 }
1812
1813                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1814                 PMD_INIT_LOG(DEBUG,
1815                              "After freeing txq[%d] used and unused buf", i);
1816                 VIRTQUEUE_DUMP(txvq->vq);
1817         }
1818 }
1819
1820 /*
1821  * Stop device: disable interrupt and mark link down
1822  */
1823 static void
1824 virtio_dev_stop(struct rte_eth_dev *dev)
1825 {
1826         struct rte_eth_link link;
1827         struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
1828
1829         PMD_INIT_LOG(DEBUG, "stop");
1830
1831         if (intr_conf->lsc || intr_conf->rxq)
1832                 rte_intr_disable(dev->intr_handle);
1833
1834         memset(&link, 0, sizeof(link));
1835         virtio_dev_atomic_write_link_status(dev, &link);
1836 }
1837
1838 static int
1839 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1840 {
1841         struct rte_eth_link link, old;
1842         uint16_t status;
1843         struct virtio_hw *hw = dev->data->dev_private;
1844         memset(&link, 0, sizeof(link));
1845         virtio_dev_atomic_read_link_status(dev, &link);
1846         old = link;
1847         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1848         link.link_speed  = SPEED_10G;
1849
1850         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1851                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1852                 vtpci_read_dev_config(hw,
1853                                 offsetof(struct virtio_net_config, status),
1854                                 &status, sizeof(status));
1855                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1856                         link.link_status = ETH_LINK_DOWN;
1857                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1858                                      dev->data->port_id);
1859                 } else {
1860                         link.link_status = ETH_LINK_UP;
1861                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1862                                      dev->data->port_id);
1863                 }
1864         } else {
1865                 link.link_status = ETH_LINK_UP;
1866         }
1867         virtio_dev_atomic_write_link_status(dev, &link);
1868
1869         return (old.link_status == link.link_status) ? -1 : 0;
1870 }
1871
1872 static void
1873 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1874 {
1875         uint64_t tso_mask, host_features;
1876         struct virtio_hw *hw = dev->data->dev_private;
1877
1878         dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
1879
1880         dev_info->pci_dev = dev->device ? RTE_DEV_TO_PCI(dev->device) : NULL;
1881         dev_info->max_rx_queues =
1882                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1883         dev_info->max_tx_queues =
1884                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1885         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1886         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1887         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1888         dev_info->default_txconf = (struct rte_eth_txconf) {
1889                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1890         };
1891
1892         host_features = VTPCI_OPS(hw)->get_features(hw);
1893         dev_info->rx_offload_capa = 0;
1894         if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
1895                 dev_info->rx_offload_capa |=
1896                         DEV_RX_OFFLOAD_TCP_CKSUM |
1897                         DEV_RX_OFFLOAD_UDP_CKSUM;
1898         }
1899         tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1900                 (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1901         if ((host_features & tso_mask) == tso_mask)
1902                 dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
1903
1904         dev_info->tx_offload_capa = 0;
1905         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1906                 dev_info->tx_offload_capa |=
1907                         DEV_TX_OFFLOAD_UDP_CKSUM |
1908                         DEV_TX_OFFLOAD_TCP_CKSUM;
1909         }
1910         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1911                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1912         if ((hw->guest_features & tso_mask) == tso_mask)
1913                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1914 }
1915
1916 /*
1917  * It enables testpmd to collect per queue stats.
1918  */
1919 static int
1920 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1921 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1922 __rte_unused uint8_t is_rx)
1923 {
1924         return 0;
1925 }
1926
1927 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1928 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
1929 RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio");