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 dev->pci_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 (dev->pci_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         if (hw->vqs == NULL)
 549                 return;
 550
 551         for (i = 0; i < nr_vq; i++) {
 552                 vq = hw->vqs[i];
 553                 if (!vq)
 554                         continue;
 555
 556                 queue_type = virtio_get_queue_type(hw, i);
 557                 if (queue_type == VTNET_RQ) {
 558                         rte_free(vq->sw_ring);
 559                         rte_memzone_free(vq->rxq.mz);
 560                 } else if (queue_type == VTNET_TQ) {
 561                         rte_memzone_free(vq->txq.mz);
 562                         rte_memzone_free(vq->txq.virtio_net_hdr_mz);
 563                 } else {
 564                         rte_memzone_free(vq->cq.mz);
 565                         rte_memzone_free(vq->cq.virtio_net_hdr_mz);
 566                 }
 567
 568                 rte_free(vq);
 569                 hw->vqs[i] = NULL;
 570         }
 571
 572         rte_free(hw->vqs);
 573         hw->vqs = NULL;
 574 }
 575
 576 static int
 577 virtio_alloc_queues(struct rte_eth_dev *dev)
 578 {
 579         struct virtio_hw *hw = dev->data->dev_private;
 580         uint16_t nr_vq = virtio_get_nr_vq(hw);
 581         uint16_t i;
 582         int ret;
 583
 584         hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
 585         if (!hw->vqs) {
 586                 PMD_INIT_LOG(ERR, "failed to allocate vqs");
 587                 return -ENOMEM;
 588         }
 589
 590         for (i = 0; i < nr_vq; i++) {
 591                 ret = virtio_init_queue(dev, i);
 592                 if (ret < 0) {
 593                         virtio_free_queues(hw);
 594                         return ret;
 595                 }
 596         }
 597
 598         return 0;
 599 }
 600
 601 static void
 602 virtio_dev_close(struct rte_eth_dev *dev)
 603 {
 604         struct virtio_hw *hw = dev->data->dev_private;
 605
 606         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 607
 608         /* reset the NIC */
 609         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 610                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 611         vtpci_reset(hw);
 612         virtio_dev_free_mbufs(dev);
 613         virtio_free_queues(hw);
 614 }
 615
 616 static void
 617 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 618 {
 619         struct virtio_hw *hw = dev->data->dev_private;
 620         struct virtio_pmd_ctrl ctrl;
 621         int dlen[1];
 622         int ret;
 623
 624         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 625                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 626                 return;
 627         }
 628
 629         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 630         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 631         ctrl.data[0] = 1;
 632         dlen[0] = 1;
 633
 634         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 635         if (ret)
 636                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 637 }
 638
 639 static void
 640 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 641 {
 642         struct virtio_hw *hw = dev->data->dev_private;
 643         struct virtio_pmd_ctrl ctrl;
 644         int dlen[1];
 645         int ret;
 646
 647         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 648                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 649                 return;
 650         }
 651
 652         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 653         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 654         ctrl.data[0] = 0;
 655         dlen[0] = 1;
 656
 657         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 658         if (ret)
 659                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 660 }
 661
 662 static void
 663 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 664 {
 665         struct virtio_hw *hw = dev->data->dev_private;
 666         struct virtio_pmd_ctrl ctrl;
 667         int dlen[1];
 668         int ret;
 669
 670         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 671                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 672                 return;
 673         }
 674
 675         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 676         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 677         ctrl.data[0] = 1;
 678         dlen[0] = 1;
 679
 680         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 681         if (ret)
 682                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 683 }
 684
 685 static void
 686 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 687 {
 688         struct virtio_hw *hw = dev->data->dev_private;
 689         struct virtio_pmd_ctrl ctrl;
 690         int dlen[1];
 691         int ret;
 692
 693         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 694                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 695                 return;
 696         }
 697
 698         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 699         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 700         ctrl.data[0] = 0;
 701         dlen[0] = 1;
 702
 703         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 704         if (ret)
 705                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 706 }
 707
 708 #define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
 709 static int
 710 virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 711 {
 712         struct virtio_hw *hw = dev->data->dev_private;
 713         uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
 714                                  hw->vtnet_hdr_size;
 715         uint32_t frame_size = mtu + ether_hdr_len;
 716
 717         if (mtu < ETHER_MIN_MTU || frame_size > VIRTIO_MAX_RX_PKTLEN) {
 718                 PMD_INIT_LOG(ERR, "MTU should be between %d and %d\n",
 719                         ETHER_MIN_MTU, VIRTIO_MAX_RX_PKTLEN - ether_hdr_len);
 720                 return -EINVAL;
 721         }
 722         return 0;
 723 }
 724
 725 /*
 726  * dev_ops for virtio, bare necessities for basic operation
 727  */
 728 static const struct eth_dev_ops virtio_eth_dev_ops = {
 729         .dev_configure           = virtio_dev_configure,
 730         .dev_start               = virtio_dev_start,
 731         .dev_stop                = virtio_dev_stop,
 732         .dev_close               = virtio_dev_close,
 733         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 734         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 735         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 736         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 737         .mtu_set                 = virtio_mtu_set,
 738         .dev_infos_get           = virtio_dev_info_get,
 739         .stats_get               = virtio_dev_stats_get,
 740         .xstats_get              = virtio_dev_xstats_get,
 741         .xstats_get_names        = virtio_dev_xstats_get_names,
 742         .stats_reset             = virtio_dev_stats_reset,
 743         .xstats_reset            = virtio_dev_stats_reset,
 744         .link_update             = virtio_dev_link_update,
 745         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 746         .rx_queue_release        = virtio_dev_queue_release,
 747         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 748         .tx_queue_release        = virtio_dev_queue_release,
 749         /* collect stats per queue */
 750         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 751         .vlan_filter_set         = virtio_vlan_filter_set,
 752         .mac_addr_add            = virtio_mac_addr_add,
 753         .mac_addr_remove         = virtio_mac_addr_remove,
 754         .mac_addr_set            = virtio_mac_addr_set,
 755 };
 756
 757 static inline int
 758 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 759                                 struct rte_eth_link *link)
 760 {
 761         struct rte_eth_link *dst = link;
 762         struct rte_eth_link *src = &(dev->data->dev_link);
 763
 764         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 765                         *(uint64_t *)src) == 0)
 766                 return -1;
 767
 768         return 0;
 769 }
 770
 771 /**
 772  * Atomically writes the link status information into global
 773  * structure rte_eth_dev.
 774  *
 775  * @param dev
 776  *   - Pointer to the structure rte_eth_dev to read from.
 777  *   - Pointer to the buffer to be saved with the link status.
 778  *
 779  * @return
 780  *   - On success, zero.
 781  *   - On failure, negative value.
 782  */
 783 static inline int
 784 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 785                 struct rte_eth_link *link)
 786 {
 787         struct rte_eth_link *dst = &(dev->data->dev_link);
 788         struct rte_eth_link *src = link;
 789
 790         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 791                                         *(uint64_t *)src) == 0)
 792                 return -1;
 793
 794         return 0;
 795 }
 796
 797 static void
 798 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 799 {
 800         unsigned i;
 801
 802         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 803                 const struct virtnet_tx *txvq = dev->data->tx_queues[i];
 804                 if (txvq == NULL)
 805                         continue;
 806
 807                 stats->opackets += txvq->stats.packets;
 808                 stats->obytes += txvq->stats.bytes;
 809                 stats->oerrors += txvq->stats.errors;
 810
 811                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 812                         stats->q_opackets[i] = txvq->stats.packets;
 813                         stats->q_obytes[i] = txvq->stats.bytes;
 814                 }
 815         }
 816
 817         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 818                 const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 819                 if (rxvq == NULL)
 820                         continue;
 821
 822                 stats->ipackets += rxvq->stats.packets;
 823                 stats->ibytes += rxvq->stats.bytes;
 824                 stats->ierrors += rxvq->stats.errors;
 825
 826                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 827                         stats->q_ipackets[i] = rxvq->stats.packets;
 828                         stats->q_ibytes[i] = rxvq->stats.bytes;
 829                 }
 830         }
 831
 832         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 833 }
 834
 835 static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 836                                        struct rte_eth_xstat_name *xstats_names,
 837                                        __rte_unused unsigned limit)
 838 {
 839         unsigned i;
 840         unsigned count = 0;
 841         unsigned t;
 842
 843         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 844                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 845
 846         if (xstats_names != NULL) {
 847                 /* Note: limit checked in rte_eth_xstats_names() */
 848
 849                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 850                         struct virtqueue *rxvq = dev->data->rx_queues[i];
 851                         if (rxvq == NULL)
 852                                 continue;
 853                         for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 854                                 snprintf(xstats_names[count].name,
 855                                         sizeof(xstats_names[count].name),
 856                                         "rx_q%u_%s", i,
 857                                         rte_virtio_rxq_stat_strings[t].name);
 858                                 count++;
 859                         }
 860                 }
 861
 862                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 863                         struct virtqueue *txvq = dev->data->tx_queues[i];
 864                         if (txvq == NULL)
 865                                 continue;
 866                         for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 867                                 snprintf(xstats_names[count].name,
 868                                         sizeof(xstats_names[count].name),
 869                                         "tx_q%u_%s", i,
 870                                         rte_virtio_txq_stat_strings[t].name);
 871                                 count++;
 872                         }
 873                 }
 874                 return count;
 875         }
 876         return nstats;
 877 }
 878
 879 static int
 880 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 881                       unsigned n)
 882 {
 883         unsigned i;
 884         unsigned count = 0;
 885
 886         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
 887                 dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
 888
 889         if (n < nstats)
 890                 return nstats;
 891
 892         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 893                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 894
 895                 if (rxvq == NULL)
 896                         continue;
 897
 898                 unsigned t;
 899
 900                 for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
 901                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 902                                 rte_virtio_rxq_stat_strings[t].offset);
 903                         xstats[count].id = count;
 904                         count++;
 905                 }
 906         }
 907
 908         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 909                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 910
 911                 if (txvq == NULL)
 912                         continue;
 913
 914                 unsigned t;
 915
 916                 for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
 917                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 918                                 rte_virtio_txq_stat_strings[t].offset);
 919                         xstats[count].id = count;
 920                         count++;
 921                 }
 922         }
 923
 924         return count;
 925 }
 926
 927 static void
 928 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 929 {
 930         virtio_update_stats(dev, stats);
 931 }
 932
 933 static void
 934 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 935 {
 936         unsigned int i;
 937
 938         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 939                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
 940                 if (txvq == NULL)
 941                         continue;
 942
 943                 txvq->stats.packets = 0;
 944                 txvq->stats.bytes = 0;
 945                 txvq->stats.errors = 0;
 946                 txvq->stats.multicast = 0;
 947                 txvq->stats.broadcast = 0;
 948                 memset(txvq->stats.size_bins, 0,
 949                        sizeof(txvq->stats.size_bins[0]) * 8);
 950         }
 951
 952         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 953                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
 954                 if (rxvq == NULL)
 955                         continue;
 956
 957                 rxvq->stats.packets = 0;
 958                 rxvq->stats.bytes = 0;
 959                 rxvq->stats.errors = 0;
 960                 rxvq->stats.multicast = 0;
 961                 rxvq->stats.broadcast = 0;
 962                 memset(rxvq->stats.size_bins, 0,
 963                        sizeof(rxvq->stats.size_bins[0]) * 8);
 964         }
 965 }
 966
 967 static void
 968 virtio_set_hwaddr(struct virtio_hw *hw)
 969 {
 970         vtpci_write_dev_config(hw,
 971                         offsetof(struct virtio_net_config, mac),
 972                         &hw->mac_addr, ETHER_ADDR_LEN);
 973 }
 974
 975 static void
 976 virtio_get_hwaddr(struct virtio_hw *hw)
 977 {
 978         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 979                 vtpci_read_dev_config(hw,
 980                         offsetof(struct virtio_net_config, mac),
 981                         &hw->mac_addr, ETHER_ADDR_LEN);
 982         } else {
 983                 eth_random_addr(&hw->mac_addr[0]);
 984                 virtio_set_hwaddr(hw);
 985         }
 986 }
 987
 988 static void
 989 virtio_mac_table_set(struct virtio_hw *hw,
 990                      const struct virtio_net_ctrl_mac *uc,
 991                      const struct virtio_net_ctrl_mac *mc)
 992 {
 993         struct virtio_pmd_ctrl ctrl;
 994         int err, len[2];
 995
 996         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 997                 PMD_DRV_LOG(INFO, "host does not support mac table");
 998                 return;
 999         }
1000
1001         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1002         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
1003
1004         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
1005         memcpy(ctrl.data, uc, len[0]);
1006
1007         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
1008         memcpy(ctrl.data + len[0], mc, len[1]);
1009
1010         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
1011         if (err != 0)
1012                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
1013 }
1014
1015 static void
1016 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
1017                     uint32_t index, uint32_t vmdq __rte_unused)
1018 {
1019         struct virtio_hw *hw = dev->data->dev_private;
1020         const struct ether_addr *addrs = dev->data->mac_addrs;
1021         unsigned int i;
1022         struct virtio_net_ctrl_mac *uc, *mc;
1023
1024         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1025                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1026                 return;
1027         }
1028
1029         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1030         uc->entries = 0;
1031         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1032         mc->entries = 0;
1033
1034         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1035                 const struct ether_addr *addr
1036                         = (i == index) ? mac_addr : addrs + i;
1037                 struct virtio_net_ctrl_mac *tbl
1038                         = is_multicast_ether_addr(addr) ? mc : uc;
1039
1040                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
1041         }
1042
1043         virtio_mac_table_set(hw, uc, mc);
1044 }
1045
1046 static void
1047 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
1048 {
1049         struct virtio_hw *hw = dev->data->dev_private;
1050         struct ether_addr *addrs = dev->data->mac_addrs;
1051         struct virtio_net_ctrl_mac *uc, *mc;
1052         unsigned int i;
1053
1054         if (index >= VIRTIO_MAX_MAC_ADDRS) {
1055                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
1056                 return;
1057         }
1058
1059         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
1060         uc->entries = 0;
1061         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
1062         mc->entries = 0;
1063
1064         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
1065                 struct virtio_net_ctrl_mac *tbl;
1066
1067                 if (i == index || is_zero_ether_addr(addrs + i))
1068                         continue;
1069
1070                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
1071                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
1072         }
1073
1074         virtio_mac_table_set(hw, uc, mc);
1075 }
1076
1077 static void
1078 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1079 {
1080         struct virtio_hw *hw = dev->data->dev_private;
1081
1082         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
1083
1084         /* Use atomic update if available */
1085         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
1086                 struct virtio_pmd_ctrl ctrl;
1087                 int len = ETHER_ADDR_LEN;
1088
1089                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
1090                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
1091
1092                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
1093                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
1094         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
1095                 virtio_set_hwaddr(hw);
1096 }
1097
1098 static int
1099 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
1100 {
1101         struct virtio_hw *hw = dev->data->dev_private;
1102         struct virtio_pmd_ctrl ctrl;
1103         int len;
1104
1105         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
1106                 return -ENOTSUP;
1107
1108         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
1109         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
1110         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
1111         len = sizeof(vlan_id);
1112
1113         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
1114 }
1115
1116 static int
1117 virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
1118 {
1119         uint64_t host_features;
1120
1121         /* Prepare guest_features: feature that driver wants to support */
1122         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
1123                 req_features);
1124
1125         /* Read device(host) feature bits */
1126         host_features = VTPCI_OPS(hw)->get_features(hw);
1127         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
1128                 host_features);
1129
1130         /*
1131          * Negotiate features: Subset of device feature bits are written back
1132          * guest feature bits.
1133          */
1134         hw->guest_features = req_features;
1135         hw->guest_features = vtpci_negotiate_features(hw, host_features);
1136         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
1137                 hw->guest_features);
1138
1139         if (hw->modern) {
1140                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
1141                         PMD_INIT_LOG(ERR,
1142                                 "VIRTIO_F_VERSION_1 features is not enabled.");
1143                         return -1;
1144                 }
1145                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
1146                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
1147                         PMD_INIT_LOG(ERR,
1148                                 "failed to set FEATURES_OK status!");
1149                         return -1;
1150                 }
1151         }
1152
1153         hw->req_guest_features = req_features;
1154
1155         return 0;
1156 }
1157
1158 /*
1159  * Process Virtio Config changed interrupt and call the callback
1160  * if link state changed.
1161  */
1162 static void
1163 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1164                          void *param)
1165 {
1166         struct rte_eth_dev *dev = param;
1167         struct virtio_hw *hw = dev->data->dev_private;
1168         uint8_t isr;
1169
1170         /* Read interrupt status which clears interrupt */
1171         isr = vtpci_isr(hw);
1172         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1173
1174         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1175                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1176
1177         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1178                 if (virtio_dev_link_update(dev, 0) == 0)
1179                         _rte_eth_dev_callback_process(dev,
1180                                                       RTE_ETH_EVENT_INTR_LSC, NULL);
1181         }
1182
1183 }
1184
1185 static void
1186 rx_func_get(struct rte_eth_dev *eth_dev)
1187 {
1188         struct virtio_hw *hw = eth_dev->data->dev_private;
1189         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1190                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1191         else
1192                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1193 }
1194
1195 /* reset device and renegotiate features if needed */
1196 static int
1197 virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
1198 {
1199         struct virtio_hw *hw = eth_dev->data->dev_private;
1200         struct virtio_net_config *config;
1201         struct virtio_net_config local_config;
1202         struct rte_pci_device *pci_dev = eth_dev->pci_dev;
1203         int ret;
1204
1205         /* Reset the device although not necessary at startup */
1206         vtpci_reset(hw);
1207
1208         /* Tell the host we've noticed this device. */
1209         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1210
1211         /* Tell the host we've known how to drive the device. */
1212         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1213         if (virtio_negotiate_features(hw, req_features) < 0)
1214                 return -1;
1215
1216         rte_eth_copy_pci_info(eth_dev, pci_dev);
1217
1218         /* If host does not support both status and MSI-X then disable LSC */
1219         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) && hw->use_msix)
1220                 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
1221         else
1222                 eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1223
1224         rx_func_get(eth_dev);
1225
1226         /* Setting up rx_header size for the device */
1227         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1228             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1229                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1230         else
1231                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1232
1233         /* Copy the permanent MAC address to: virtio_hw */
1234         virtio_get_hwaddr(hw);
1235         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1236                         &eth_dev->data->mac_addrs[0]);
1237         PMD_INIT_LOG(DEBUG,
1238                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1239                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1240                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1241
1242         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1243                 config = &local_config;
1244
1245                 vtpci_read_dev_config(hw,
1246                         offsetof(struct virtio_net_config, mac),
1247                         &config->mac, sizeof(config->mac));
1248
1249                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1250                         vtpci_read_dev_config(hw,
1251                                 offsetof(struct virtio_net_config, status),
1252                                 &config->status, sizeof(config->status));
1253                 } else {
1254                         PMD_INIT_LOG(DEBUG,
1255                                      "VIRTIO_NET_F_STATUS is not supported");
1256                         config->status = 0;
1257                 }
1258
1259                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1260                         vtpci_read_dev_config(hw,
1261                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1262                                 &config->max_virtqueue_pairs,
1263                                 sizeof(config->max_virtqueue_pairs));
1264                 } else {
1265                         PMD_INIT_LOG(DEBUG,
1266                                      "VIRTIO_NET_F_MQ is not supported");
1267                         config->max_virtqueue_pairs = 1;
1268                 }
1269
1270                 hw->max_queue_pairs = config->max_virtqueue_pairs;
1271
1272                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1273                                 config->max_virtqueue_pairs);
1274                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1275                 PMD_INIT_LOG(DEBUG,
1276                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1277                                 config->mac[0], config->mac[1],
1278                                 config->mac[2], config->mac[3],
1279                                 config->mac[4], config->mac[5]);
1280         } else {
1281                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
1282                 hw->max_queue_pairs = 1;
1283         }
1284
1285         ret = virtio_alloc_queues(eth_dev);
1286         if (ret < 0)
1287                 return ret;
1288         vtpci_reinit_complete(hw);
1289
1290         if (pci_dev)
1291                 PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1292                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1293                         pci_dev->id.device_id);
1294
1295         return 0;
1296 }
1297
1298 /*
1299  * Remap the PCI device again (IO port map for legacy device and
1300  * memory map for modern device), so that the secondary process
1301  * could have the PCI initiated correctly.
1302  */
1303 static int
1304 virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
1305 {
1306         if (hw->modern) {
1307                 /*
1308                  * We don't have to re-parse the PCI config space, since
1309                  * rte_eal_pci_map_device() makes sure the mapped address
1310                  * in secondary process would equal to the one mapped in
1311                  * the primary process: error will be returned if that
1312                  * requirement is not met.
1313                  *
1314                  * That said, we could simply reuse all cap pointers
1315                  * (such as dev_cfg, common_cfg, etc.) parsed from the
1316                  * primary process, which is stored in shared memory.
1317                  */
1318                 if (rte_eal_pci_map_device(pci_dev)) {
1319                         PMD_INIT_LOG(DEBUG, "failed to map pci device!");
1320                         return -1;
1321                 }
1322         } else {
1323                 if (rte_eal_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
1324                         return -1;
1325         }
1326
1327         return 0;
1328 }
1329
1330 static void
1331 virtio_set_vtpci_ops(struct virtio_hw *hw)
1332 {
1333 #ifdef RTE_VIRTIO_USER
1334         if (hw->virtio_user_dev)
1335                 VTPCI_OPS(hw) = &virtio_user_ops;
1336         else
1337 #endif
1338         if (hw->modern)
1339                 VTPCI_OPS(hw) = &modern_ops;
1340         else
1341                 VTPCI_OPS(hw) = &legacy_ops;
1342 }
1343
1344 /*
1345  * This function is based on probe() function in virtio_pci.c
1346  * It returns 0 on success.
1347  */
1348 int
1349 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1350 {
1351         struct virtio_hw *hw = eth_dev->data->dev_private;
1352         struct rte_pci_device *pci_dev;
1353         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1354         int ret;
1355
1356         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1357
1358         eth_dev->dev_ops = &virtio_eth_dev_ops;
1359         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1360
1361         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1362                 if (!hw->virtio_user_dev) {
1363                         ret = virtio_remap_pci(eth_dev->pci_dev, hw);
1364                         if (ret)
1365                                 return ret;
1366                 }
1367
1368                 virtio_set_vtpci_ops(hw);
1369                 if (hw->use_simple_rxtx) {
1370                         eth_dev->tx_pkt_burst = virtio_xmit_pkts_simple;
1371                         eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
1372                 } else {
1373                         rx_func_get(eth_dev);
1374                 }
1375                 return 0;
1376         }
1377
1378         /* Allocate memory for storing MAC addresses */
1379         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1380         if (eth_dev->data->mac_addrs == NULL) {
1381                 PMD_INIT_LOG(ERR,
1382                         "Failed to allocate %d bytes needed to store MAC addresses",
1383                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1384                 return -ENOMEM;
1385         }
1386
1387         pci_dev = eth_dev->pci_dev;
1388         hw->port_id = eth_dev->data->port_id;
1389
1390         if (pci_dev) {
1391                 ret = vtpci_init(pci_dev, hw, &dev_flags);
1392                 if (ret)
1393                         return ret;
1394         }
1395
1396         eth_dev->data->dev_flags = dev_flags;
1397
1398         /* reset device and negotiate default features */
1399         ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
1400         if (ret < 0)
1401                 return ret;
1402
1403         /* Setup interrupt callback  */
1404         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1405                 rte_intr_callback_register(&pci_dev->intr_handle,
1406                         virtio_interrupt_handler, eth_dev);
1407
1408         return 0;
1409 }
1410
1411 static int
1412 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1413 {
1414         struct rte_pci_device *pci_dev;
1415
1416         PMD_INIT_FUNC_TRACE();
1417
1418         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1419                 return -EPERM;
1420
1421         virtio_dev_stop(eth_dev);
1422         virtio_dev_close(eth_dev);
1423         pci_dev = eth_dev->pci_dev;
1424
1425         eth_dev->dev_ops = NULL;
1426         eth_dev->tx_pkt_burst = NULL;
1427         eth_dev->rx_pkt_burst = NULL;
1428
1429         rte_free(eth_dev->data->mac_addrs);
1430         eth_dev->data->mac_addrs = NULL;
1431
1432         /* reset interrupt callback  */
1433         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1434                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1435                                                 virtio_interrupt_handler,
1436                                                 eth_dev);
1437         rte_eal_pci_unmap_device(pci_dev);
1438
1439         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1440
1441         return 0;
1442 }
1443
1444 static struct eth_driver rte_virtio_pmd = {
1445         .pci_drv = {
1446                 .driver = {
1447                         .name = "net_virtio",
1448                 },
1449                 .id_table = pci_id_virtio_map,
1450                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1451                 .probe = rte_eth_dev_pci_probe,
1452                 .remove = rte_eth_dev_pci_remove,
1453         },
1454         .eth_dev_init = eth_virtio_dev_init,
1455         .eth_dev_uninit = eth_virtio_dev_uninit,
1456         .dev_private_size = sizeof(struct virtio_hw),
1457 };
1458
1459 RTE_INIT(rte_virtio_pmd_init);
1460 static void
1461 rte_virtio_pmd_init(void)
1462 {
1463         if (rte_eal_iopl_init() != 0) {
1464                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1465                 return;
1466         }
1467
1468         rte_eal_pci_register(&rte_virtio_pmd.pci_drv);
1469 }
1470
1471 /*
1472  * Configure virtio device
1473  * It returns 0 on success.
1474  */
1475 static int
1476 virtio_dev_configure(struct rte_eth_dev *dev)
1477 {
1478         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1479         struct virtio_hw *hw = dev->data->dev_private;
1480         uint64_t req_features;
1481         int ret;
1482
1483         PMD_INIT_LOG(DEBUG, "configure");
1484         req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
1485         if (rxmode->hw_ip_checksum)
1486                 req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
1487         if (rxmode->enable_lro)
1488                 req_features |=
1489                         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
1490                         (1ULL << VIRTIO_NET_F_GUEST_TSO6);
1491
1492         /* if request features changed, reinit the device */
1493         if (req_features != hw->req_guest_features) {
1494                 ret = virtio_init_device(dev, req_features);
1495                 if (ret < 0)
1496                         return ret;
1497         }
1498
1499         if (rxmode->hw_ip_checksum &&
1500                 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
1501                 PMD_DRV_LOG(NOTICE,
1502                         "rx ip checksum not available on this host");
1503                 return -ENOTSUP;
1504         }
1505
1506         if (rxmode->enable_lro &&
1507                 (!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
1508                         !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4))) {
1509                 PMD_DRV_LOG(NOTICE,
1510                         "lro not available on this host");
1511                 return -ENOTSUP;
1512         }
1513
1514         /* start control queue */
1515         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
1516                 virtio_dev_cq_start(dev);
1517
1518         hw->vlan_strip = rxmode->hw_vlan_strip;
1519
1520         if (rxmode->hw_vlan_filter
1521             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1522                 PMD_DRV_LOG(NOTICE,
1523                             "vlan filtering not available on this host");
1524                 return -ENOTSUP;
1525         }
1526
1527         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1528                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1529                         PMD_DRV_LOG(ERR, "failed to set config vector");
1530                         return -EBUSY;
1531                 }
1532
1533         return 0;
1534 }
1535
1536
1537 static int
1538 virtio_dev_start(struct rte_eth_dev *dev)
1539 {
1540         uint16_t nb_queues, i;
1541         struct virtnet_rx *rxvq;
1542         struct virtnet_tx *txvq __rte_unused;
1543         struct virtio_hw *hw = dev->data->dev_private;
1544
1545         /* check if lsc interrupt feature is enabled */
1546         if (dev->data->dev_conf.intr_conf.lsc) {
1547                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1548                         PMD_DRV_LOG(ERR, "link status not supported by host");
1549                         return -ENOTSUP;
1550                 }
1551
1552                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1553                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1554                         return -EIO;
1555                 }
1556         }
1557
1558         /*Notify the backend
1559          *Otherwise the tap backend might already stop its queue due to fullness.
1560          *vhost backend will have no chance to be waked up
1561          */
1562         nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
1563         if (hw->max_queue_pairs > 1) {
1564                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1565                         return -EINVAL;
1566         }
1567
1568         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1569
1570         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1571                 rxvq = dev->data->rx_queues[i];
1572                 virtqueue_notify(rxvq->vq);
1573         }
1574
1575         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1576
1577         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1578                 rxvq = dev->data->rx_queues[i];
1579                 VIRTQUEUE_DUMP(rxvq->vq);
1580         }
1581
1582         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1583                 txvq = dev->data->tx_queues[i];
1584                 VIRTQUEUE_DUMP(txvq->vq);
1585         }
1586
1587         hw->started = 1;
1588
1589         /* Initialize Link state */
1590         virtio_dev_link_update(dev, 0);
1591
1592         return 0;
1593 }
1594
1595 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1596 {
1597         struct rte_mbuf *buf;
1598         int i, mbuf_num = 0;
1599
1600         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1601                 struct virtnet_rx *rxvq = dev->data->rx_queues[i];
1602
1603                 PMD_INIT_LOG(DEBUG,
1604                              "Before freeing rxq[%d] used and unused buf", i);
1605                 VIRTQUEUE_DUMP(rxvq->vq);
1606
1607                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p", i, rxvq);
1608                 while ((buf = virtqueue_detatch_unused(rxvq->vq)) != NULL) {
1609                         rte_pktmbuf_free(buf);
1610                         mbuf_num++;
1611                 }
1612
1613                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1614                 PMD_INIT_LOG(DEBUG,
1615                              "After freeing rxq[%d] used and unused buf", i);
1616                 VIRTQUEUE_DUMP(rxvq->vq);
1617         }
1618
1619         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1620                 struct virtnet_tx *txvq = dev->data->tx_queues[i];
1621
1622                 PMD_INIT_LOG(DEBUG,
1623                              "Before freeing txq[%d] used and unused bufs",
1624                              i);
1625                 VIRTQUEUE_DUMP(txvq->vq);
1626
1627                 mbuf_num = 0;
1628                 while ((buf = virtqueue_detatch_unused(txvq->vq)) != NULL) {
1629                         rte_pktmbuf_free(buf);
1630                         mbuf_num++;
1631                 }
1632
1633                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1634                 PMD_INIT_LOG(DEBUG,
1635                              "After freeing txq[%d] used and unused buf", i);
1636                 VIRTQUEUE_DUMP(txvq->vq);
1637         }
1638 }
1639
1640 /*
1641  * Stop device: disable interrupt and mark link down
1642  */
1643 static void
1644 virtio_dev_stop(struct rte_eth_dev *dev)
1645 {
1646         struct virtio_hw *hw = dev->data->dev_private;
1647         struct rte_eth_link link;
1648
1649         PMD_INIT_LOG(DEBUG, "stop");
1650
1651         if (dev->data->dev_conf.intr_conf.lsc)
1652                 rte_intr_disable(&dev->pci_dev->intr_handle);
1653
1654         hw->started = 0;
1655         memset(&link, 0, sizeof(link));
1656         virtio_dev_atomic_write_link_status(dev, &link);
1657 }
1658
1659 static int
1660 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1661 {
1662         struct rte_eth_link link, old;
1663         uint16_t status;
1664         struct virtio_hw *hw = dev->data->dev_private;
1665         memset(&link, 0, sizeof(link));
1666         virtio_dev_atomic_read_link_status(dev, &link);
1667         old = link;
1668         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1669         link.link_speed  = SPEED_10G;
1670
1671         if (hw->started == 0) {
1672                 link.link_status = ETH_LINK_DOWN;
1673         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1674                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1675                 vtpci_read_dev_config(hw,
1676                                 offsetof(struct virtio_net_config, status),
1677                                 &status, sizeof(status));
1678                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1679                         link.link_status = ETH_LINK_DOWN;
1680                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1681                                      dev->data->port_id);
1682                 } else {
1683                         link.link_status = ETH_LINK_UP;
1684                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1685                                      dev->data->port_id);
1686                 }
1687         } else {
1688                 link.link_status = ETH_LINK_UP;
1689         }
1690         virtio_dev_atomic_write_link_status(dev, &link);
1691
1692         return (old.link_status == link.link_status) ? -1 : 0;
1693 }
1694
1695 static void
1696 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1697 {
1698         uint64_t tso_mask;
1699         struct virtio_hw *hw = dev->data->dev_private;
1700
1701         if (dev->pci_dev)
1702                 dev_info->driver_name = dev->driver->pci_drv.driver.name;
1703         else
1704                 dev_info->driver_name = "virtio_user PMD";
1705         dev_info->max_rx_queues =
1706                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
1707         dev_info->max_tx_queues =
1708                 RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
1709         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1710         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1711         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1712         dev_info->default_txconf = (struct rte_eth_txconf) {
1713                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1714         };
1715         dev_info->rx_offload_capa =
1716                 DEV_RX_OFFLOAD_TCP_CKSUM |
1717                 DEV_RX_OFFLOAD_UDP_CKSUM |
1718                 DEV_RX_OFFLOAD_TCP_LRO;
1719         dev_info->tx_offload_capa = 0;
1720
1721         if (hw->guest_features & (1ULL << VIRTIO_NET_F_CSUM)) {
1722                 dev_info->tx_offload_capa |=
1723                         DEV_TX_OFFLOAD_UDP_CKSUM |
1724                         DEV_TX_OFFLOAD_TCP_CKSUM;
1725         }
1726
1727         tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
1728                 (1ULL << VIRTIO_NET_F_HOST_TSO6);
1729         if ((hw->guest_features & tso_mask) == tso_mask)
1730                 dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
1731 }
1732
1733 /*
1734  * It enables testpmd to collect per queue stats.
1735  */
1736 static int
1737 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1738 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1739 __rte_unused uint8_t is_rx)
1740 {
1741         return 0;
1742 }
1743
1744 RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
1745 RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);