drivers/net/virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2015 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
  63 static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
  64 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  65 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  66 static int  virtio_dev_start(struct rte_eth_dev *dev);
  67 static void virtio_dev_stop(struct rte_eth_dev *dev);
  68 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  69 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  70 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  71 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  72 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  73                                 struct rte_eth_dev_info *dev_info);
  74 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  75         __rte_unused int wait_to_complete);
  76
  77 static void virtio_set_hwaddr(struct virtio_hw *hw);
  78 static void virtio_get_hwaddr(struct virtio_hw *hw);
  79
  80 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  81                                  struct rte_eth_stats *stats);
  82 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  83                                  struct rte_eth_xstats *xstats, unsigned n);
  84 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  85 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  86 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  87                                 uint16_t vlan_id, int on);
  88 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  89                                 struct ether_addr *mac_addr,
  90                                 uint32_t index, uint32_t vmdq __rte_unused);
  91 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  92 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  93                                 struct ether_addr *mac_addr);
  94
  95 static int virtio_dev_queue_stats_mapping_set(
  96         __rte_unused struct rte_eth_dev *eth_dev,
  97         __rte_unused uint16_t queue_id,
  98         __rte_unused uint8_t stat_idx,
  99         __rte_unused uint8_t is_rx);
 100
 101 /*
 102  * The set of PCI devices this driver supports
 103  */
 104 static const struct rte_pci_id pci_id_virtio_map[] = {
 105
 106 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
 107 #include "rte_pci_dev_ids.h"
 108
 109 { .vendor_id = 0, /* sentinel */ },
 110 };
 111
 112 struct rte_virtio_xstats_name_off {
 113         char name[RTE_ETH_XSTATS_NAME_SIZE];
 114         unsigned offset;
 115 };
 116
 117 /* [rt]x_qX_ is prepended to the name string here */
 118 static const struct rte_virtio_xstats_name_off rte_virtio_q_stat_strings[] = {
 119         {"good_packets",           offsetof(struct virtqueue, packets)},
 120         {"good_bytes",             offsetof(struct virtqueue, bytes)},
 121         {"errors",                 offsetof(struct virtqueue, errors)},
 122         {"multicast_packets",      offsetof(struct virtqueue, multicast)},
 123         {"broadcast_packets",      offsetof(struct virtqueue, broadcast)},
 124         {"undersize_packets",      offsetof(struct virtqueue, size_bins[0])},
 125         {"size_64_packets",        offsetof(struct virtqueue, size_bins[1])},
 126         {"size_65_127_packets",    offsetof(struct virtqueue, size_bins[2])},
 127         {"size_128_255_packets",   offsetof(struct virtqueue, size_bins[3])},
 128         {"size_256_511_packets",   offsetof(struct virtqueue, size_bins[4])},
 129         {"size_512_1023_packets",  offsetof(struct virtqueue, size_bins[5])},
 130         {"size_1024_1517_packets", offsetof(struct virtqueue, size_bins[6])},
 131         {"size_1518_max_packets",  offsetof(struct virtqueue, size_bins[7])},
 132 };
 133
 134 #define VIRTIO_NB_Q_XSTATS (sizeof(rte_virtio_q_stat_strings) / \
 135                             sizeof(rte_virtio_q_stat_strings[0]))
 136
 137 static int
 138 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
 139                 int *dlen, int pkt_num)
 140 {
 141         uint32_t head, i;
 142         int k, sum = 0;
 143         virtio_net_ctrl_ack status = ~0;
 144         struct virtio_pmd_ctrl result;
 145
 146         ctrl->status = status;
 147
 148         if (!(vq && vq->hw->cvq)) {
 149                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 150                 return -1;
 151         }
 152         head = vq->vq_desc_head_idx;
 153
 154         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 155                 "vq->hw->cvq = %p vq = %p",
 156                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 157
 158         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 159                 return -1;
 160
 161         memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
 162                 sizeof(struct virtio_pmd_ctrl));
 163
 164         /*
 165          * Format is enforced in qemu code:
 166          * One TX packet for header;
 167          * At least one TX packet per argument;
 168          * One RX packet for ACK.
 169          */
 170         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 171         vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
 172         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 173         vq->vq_free_cnt--;
 174         i = vq->vq_ring.desc[head].next;
 175
 176         for (k = 0; k < pkt_num; k++) {
 177                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 178                 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 179                         + sizeof(struct virtio_net_ctrl_hdr)
 180                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 181                 vq->vq_ring.desc[i].len = dlen[k];
 182                 sum += dlen[k];
 183                 vq->vq_free_cnt--;
 184                 i = vq->vq_ring.desc[i].next;
 185         }
 186
 187         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 188         vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 189                         + sizeof(struct virtio_net_ctrl_hdr);
 190         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 191         vq->vq_free_cnt--;
 192
 193         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 194
 195         vq_update_avail_ring(vq, head);
 196         vq_update_avail_idx(vq);
 197
 198         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 199
 200         virtqueue_notify(vq);
 201
 202         rte_rmb();
 203         while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
 204                 rte_rmb();
 205                 usleep(100);
 206         }
 207
 208         while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
 209                 uint32_t idx, desc_idx, used_idx;
 210                 struct vring_used_elem *uep;
 211
 212                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 213                                 & (vq->vq_nentries - 1));
 214                 uep = &vq->vq_ring.used->ring[used_idx];
 215                 idx = (uint32_t) uep->id;
 216                 desc_idx = idx;
 217
 218                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 219                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 220                         vq->vq_free_cnt++;
 221                 }
 222
 223                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 224                 vq->vq_desc_head_idx = idx;
 225
 226                 vq->vq_used_cons_idx++;
 227                 vq->vq_free_cnt++;
 228         }
 229
 230         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 231                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 232
 233         memcpy(&result, vq->virtio_net_hdr_mz->addr,
 234                         sizeof(struct virtio_pmd_ctrl));
 235
 236         return result.status;
 237 }
 238
 239 static int
 240 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 241 {
 242         struct virtio_hw *hw = dev->data->dev_private;
 243         struct virtio_pmd_ctrl ctrl;
 244         int dlen[1];
 245         int ret;
 246
 247         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 248         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 249         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 250
 251         dlen[0] = sizeof(uint16_t);
 252
 253         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 254         if (ret) {
 255                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 256                           "failed, this is too late now...");
 257                 return -EINVAL;
 258         }
 259
 260         return 0;
 261 }
 262
 263 void
 264 virtio_dev_queue_release(struct virtqueue *vq) {
 265         struct virtio_hw *hw;
 266
 267         if (vq) {
 268                 hw = vq->hw;
 269                 hw->vtpci_ops->del_queue(hw, vq);
 270
 271                 rte_free(vq->sw_ring);
 272                 rte_free(vq);
 273         }
 274 }
 275
 276 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 277                         int queue_type,
 278                         uint16_t queue_idx,
 279                         uint16_t vtpci_queue_idx,
 280                         uint16_t nb_desc,
 281                         unsigned int socket_id,
 282                         struct virtqueue **pvq)
 283 {
 284         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 285         const struct rte_memzone *mz;
 286         unsigned int vq_size, size;
 287         struct virtio_hw *hw = dev->data->dev_private;
 288         struct virtqueue *vq = NULL;
 289
 290         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 291
 292         /*
 293          * Read the virtqueue size from the Queue Size field
 294          * Always power of 2 and if 0 virtqueue does not exist
 295          */
 296         vq_size = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx);
 297         PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc);
 298         if (vq_size == 0) {
 299                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 300                 return -EINVAL;
 301         }
 302
 303         if (!rte_is_power_of_2(vq_size)) {
 304                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 305                 return -EINVAL;
 306         }
 307
 308         if (queue_type == VTNET_RQ) {
 309                 snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
 310                         dev->data->port_id, queue_idx);
 311                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 312                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 313                 vq->sw_ring = rte_zmalloc_socket("rxq->sw_ring",
 314                         (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 315                         sizeof(vq->sw_ring[0]), RTE_CACHE_LINE_SIZE, socket_id);
 316         } else if (queue_type == VTNET_TQ) {
 317                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
 318                         dev->data->port_id, queue_idx);
 319                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 320                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 321         } else if (queue_type == VTNET_CQ) {
 322                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
 323                         dev->data->port_id);
 324                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 325                         vq_size * sizeof(struct vq_desc_extra),
 326                         RTE_CACHE_LINE_SIZE);
 327         }
 328         if (vq == NULL) {
 329                 PMD_INIT_LOG(ERR, "Can not allocate virtqueue");
 330                 return -ENOMEM;
 331         }
 332         if (queue_type == VTNET_RQ && vq->sw_ring == NULL) {
 333                 PMD_INIT_LOG(ERR, "Can not allocate RX soft ring");
 334                 rte_free(vq);
 335                 return -ENOMEM;
 336         }
 337
 338         vq->hw = hw;
 339         vq->port_id = dev->data->port_id;
 340         vq->queue_id = queue_idx;
 341         vq->vq_queue_index = vtpci_queue_idx;
 342         vq->vq_nentries = vq_size;
 343
 344         if (nb_desc == 0 || nb_desc > vq_size)
 345                 nb_desc = vq_size;
 346         vq->vq_free_cnt = nb_desc;
 347
 348         /*
 349          * Reserve a memzone for vring elements
 350          */
 351         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 352         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 353         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
 354
 355         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 356                 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
 357         if (mz == NULL) {
 358                 if (rte_errno == EEXIST)
 359                         mz = rte_memzone_lookup(vq_name);
 360                 if (mz == NULL) {
 361                         rte_free(vq);
 362                         return -ENOMEM;
 363                 }
 364         }
 365
 366         /*
 367          * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
 368          * and only accepts 32 bit page frame number.
 369          * Check if the allocated physical memory exceeds 16TB.
 370          */
 371         if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
 372                 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
 373                 rte_free(vq);
 374                 return -ENOMEM;
 375         }
 376
 377         memset(mz->addr, 0, sizeof(mz->len));
 378         vq->mz = mz;
 379         vq->vq_ring_mem = mz->phys_addr;
 380         vq->vq_ring_virt_mem = mz->addr;
 381         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64, (uint64_t)mz->phys_addr);
 382         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
 383         vq->virtio_net_hdr_mz  = NULL;
 384         vq->virtio_net_hdr_mem = 0;
 385
 386         if (queue_type == VTNET_TQ) {
 387                 const struct rte_memzone *hdr_mz;
 388                 struct virtio_tx_region *txr;
 389                 unsigned int i;
 390
 391                 /*
 392                  * For each xmit packet, allocate a virtio_net_hdr
 393                  * and indirect ring elements
 394                  */
 395                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
 396                          dev->data->port_id, queue_idx);
 397                 hdr_mz = rte_memzone_reserve_aligned(vq_name,
 398                                                      vq_size * sizeof(*txr),
 399                                                      socket_id, 0,
 400                                                      RTE_CACHE_LINE_SIZE);
 401                 if (hdr_mz == NULL) {
 402                         if (rte_errno == EEXIST)
 403                                 hdr_mz = rte_memzone_lookup(vq_name);
 404                         if (hdr_mz == NULL) {
 405                                 rte_free(vq);
 406                                 return -ENOMEM;
 407                         }
 408                 }
 409                 vq->virtio_net_hdr_mz = hdr_mz;
 410                 vq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 411
 412                 txr = hdr_mz->addr;
 413                 memset(txr, 0, vq_size * sizeof(*txr));
 414                 for (i = 0; i < vq_size; i++) {
 415                         struct vring_desc *start_dp = txr[i].tx_indir;
 416
 417                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 418
 419                         /* first indirect descriptor is always the tx header */
 420                         start_dp->addr = vq->virtio_net_hdr_mem
 421                                 + i * sizeof(*txr)
 422                                 + offsetof(struct virtio_tx_region, tx_hdr);
 423
 424                         start_dp->len = vq->hw->vtnet_hdr_size;
 425                         start_dp->flags = VRING_DESC_F_NEXT;
 426                 }
 427
 428         } else if (queue_type == VTNET_CQ) {
 429                 /* Allocate a page for control vq command, data and status */
 430                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
 431                         dev->data->port_id);
 432                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 433                         PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
 434                 if (vq->virtio_net_hdr_mz == NULL) {
 435                         if (rte_errno == EEXIST)
 436                                 vq->virtio_net_hdr_mz =
 437                                         rte_memzone_lookup(vq_name);
 438                         if (vq->virtio_net_hdr_mz == NULL) {
 439                                 rte_free(vq);
 440                                 return -ENOMEM;
 441                         }
 442                 }
 443                 vq->virtio_net_hdr_mem =
 444                         vq->virtio_net_hdr_mz->phys_addr;
 445                 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 446         }
 447
 448         hw->vtpci_ops->setup_queue(hw, vq);
 449
 450         *pvq = vq;
 451         return 0;
 452 }
 453
 454 static int
 455 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 456                 uint32_t socket_id)
 457 {
 458         struct virtqueue *vq;
 459         int ret;
 460         struct virtio_hw *hw = dev->data->dev_private;
 461
 462         PMD_INIT_FUNC_TRACE();
 463         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 464                         vtpci_queue_idx, 0, socket_id, &vq);
 465         if (ret < 0) {
 466                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 467                 return ret;
 468         }
 469
 470         hw->cvq = vq;
 471         return 0;
 472 }
 473
 474 static void
 475 virtio_free_queues(struct rte_eth_dev *dev)
 476 {
 477         unsigned int i;
 478
 479         for (i = 0; i < dev->data->nb_rx_queues; i++)
 480                 virtio_dev_rx_queue_release(dev->data->rx_queues[i]);
 481
 482         dev->data->nb_rx_queues = 0;
 483
 484         for (i = 0; i < dev->data->nb_tx_queues; i++)
 485                 virtio_dev_tx_queue_release(dev->data->tx_queues[i]);
 486
 487         dev->data->nb_tx_queues = 0;
 488 }
 489
 490 static void
 491 virtio_dev_close(struct rte_eth_dev *dev)
 492 {
 493         struct virtio_hw *hw = dev->data->dev_private;
 494         struct rte_pci_device *pci_dev = dev->pci_dev;
 495
 496         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 497
 498         if (hw->started == 1)
 499                 virtio_dev_stop(dev);
 500
 501         /* reset the NIC */
 502         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
 503                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 504         vtpci_reset(hw);
 505         virtio_dev_free_mbufs(dev);
 506         virtio_free_queues(dev);
 507 }
 508
 509 static void
 510 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 511 {
 512         struct virtio_hw *hw = dev->data->dev_private;
 513         struct virtio_pmd_ctrl ctrl;
 514         int dlen[1];
 515         int ret;
 516
 517         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 518                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 519                 return;
 520         }
 521
 522         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 523         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 524         ctrl.data[0] = 1;
 525         dlen[0] = 1;
 526
 527         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 528         if (ret)
 529                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 530 }
 531
 532 static void
 533 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 534 {
 535         struct virtio_hw *hw = dev->data->dev_private;
 536         struct virtio_pmd_ctrl ctrl;
 537         int dlen[1];
 538         int ret;
 539
 540         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 541                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 542                 return;
 543         }
 544
 545         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 546         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 547         ctrl.data[0] = 0;
 548         dlen[0] = 1;
 549
 550         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 551         if (ret)
 552                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 553 }
 554
 555 static void
 556 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 557 {
 558         struct virtio_hw *hw = dev->data->dev_private;
 559         struct virtio_pmd_ctrl ctrl;
 560         int dlen[1];
 561         int ret;
 562
 563         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 564                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 565                 return;
 566         }
 567
 568         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 569         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 570         ctrl.data[0] = 1;
 571         dlen[0] = 1;
 572
 573         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 574         if (ret)
 575                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 576 }
 577
 578 static void
 579 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 580 {
 581         struct virtio_hw *hw = dev->data->dev_private;
 582         struct virtio_pmd_ctrl ctrl;
 583         int dlen[1];
 584         int ret;
 585
 586         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 587                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 588                 return;
 589         }
 590
 591         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 592         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 593         ctrl.data[0] = 0;
 594         dlen[0] = 1;
 595
 596         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 597         if (ret)
 598                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 599 }
 600
 601 /*
 602  * dev_ops for virtio, bare necessities for basic operation
 603  */
 604 static const struct eth_dev_ops virtio_eth_dev_ops = {
 605         .dev_configure           = virtio_dev_configure,
 606         .dev_start               = virtio_dev_start,
 607         .dev_stop                = virtio_dev_stop,
 608         .dev_close               = virtio_dev_close,
 609         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 610         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 611         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 612         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 613
 614         .dev_infos_get           = virtio_dev_info_get,
 615         .stats_get               = virtio_dev_stats_get,
 616         .xstats_get              = virtio_dev_xstats_get,
 617         .stats_reset             = virtio_dev_stats_reset,
 618         .xstats_reset            = virtio_dev_stats_reset,
 619         .link_update             = virtio_dev_link_update,
 620         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 621         .rx_queue_release        = virtio_dev_rx_queue_release,
 622         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 623         .tx_queue_release        = virtio_dev_tx_queue_release,
 624         /* collect stats per queue */
 625         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 626         .vlan_filter_set         = virtio_vlan_filter_set,
 627         .mac_addr_add            = virtio_mac_addr_add,
 628         .mac_addr_remove         = virtio_mac_addr_remove,
 629         .mac_addr_set            = virtio_mac_addr_set,
 630 };
 631
 632 static inline int
 633 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 634                                 struct rte_eth_link *link)
 635 {
 636         struct rte_eth_link *dst = link;
 637         struct rte_eth_link *src = &(dev->data->dev_link);
 638
 639         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 640                         *(uint64_t *)src) == 0)
 641                 return -1;
 642
 643         return 0;
 644 }
 645
 646 /**
 647  * Atomically writes the link status information into global
 648  * structure rte_eth_dev.
 649  *
 650  * @param dev
 651  *   - Pointer to the structure rte_eth_dev to read from.
 652  *   - Pointer to the buffer to be saved with the link status.
 653  *
 654  * @return
 655  *   - On success, zero.
 656  *   - On failure, negative value.
 657  */
 658 static inline int
 659 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 660                 struct rte_eth_link *link)
 661 {
 662         struct rte_eth_link *dst = &(dev->data->dev_link);
 663         struct rte_eth_link *src = link;
 664
 665         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 666                                         *(uint64_t *)src) == 0)
 667                 return -1;
 668
 669         return 0;
 670 }
 671
 672 static void
 673 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 674 {
 675         unsigned i;
 676
 677         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 678                 const struct virtqueue *txvq = dev->data->tx_queues[i];
 679                 if (txvq == NULL)
 680                         continue;
 681
 682                 stats->opackets += txvq->packets;
 683                 stats->obytes += txvq->bytes;
 684                 stats->oerrors += txvq->errors;
 685
 686                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 687                         stats->q_opackets[i] = txvq->packets;
 688                         stats->q_obytes[i] = txvq->bytes;
 689                 }
 690         }
 691
 692         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 693                 const struct virtqueue *rxvq = dev->data->rx_queues[i];
 694                 if (rxvq == NULL)
 695                         continue;
 696
 697                 stats->ipackets += rxvq->packets;
 698                 stats->ibytes += rxvq->bytes;
 699                 stats->ierrors += rxvq->errors;
 700
 701                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 702                         stats->q_ipackets[i] = rxvq->packets;
 703                         stats->q_ibytes[i] = rxvq->bytes;
 704                 }
 705         }
 706
 707         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 708 }
 709
 710 static int
 711 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstats *xstats,
 712                       unsigned n)
 713 {
 714         unsigned i;
 715         unsigned count = 0;
 716
 717         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_Q_XSTATS +
 718                 dev->data->nb_rx_queues * VIRTIO_NB_Q_XSTATS;
 719
 720         if (n < nstats)
 721                 return nstats;
 722
 723         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 724                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 725
 726                 if (rxvq == NULL)
 727                         continue;
 728
 729                 unsigned t;
 730
 731                 for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) {
 732                         snprintf(xstats[count].name, sizeof(xstats[count].name),
 733                                  "rx_q%u_%s", i,
 734                                  rte_virtio_q_stat_strings[t].name);
 735                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 736                                 rte_virtio_q_stat_strings[t].offset);
 737                         count++;
 738                 }
 739         }
 740
 741         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 742                 struct virtqueue *txvq = dev->data->tx_queues[i];
 743
 744                 if (txvq == NULL)
 745                         continue;
 746
 747                 unsigned t;
 748
 749                 for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) {
 750                         snprintf(xstats[count].name, sizeof(xstats[count].name),
 751                                  "tx_q%u_%s", i,
 752                                  rte_virtio_q_stat_strings[t].name);
 753                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 754                                 rte_virtio_q_stat_strings[t].offset);
 755                         count++;
 756                 }
 757         }
 758
 759         return count;
 760 }
 761
 762 static void
 763 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 764 {
 765         virtio_update_stats(dev, stats);
 766 }
 767
 768 static void
 769 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 770 {
 771         unsigned int i;
 772
 773         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 774                 struct virtqueue *txvq = dev->data->tx_queues[i];
 775                 if (txvq == NULL)
 776                         continue;
 777
 778                 txvq->packets = 0;
 779                 txvq->bytes = 0;
 780                 txvq->errors = 0;
 781                 txvq->multicast = 0;
 782                 txvq->broadcast = 0;
 783                 memset(txvq->size_bins, 0, sizeof(txvq->size_bins[0]) * 8);
 784         }
 785
 786         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 787                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 788                 if (rxvq == NULL)
 789                         continue;
 790
 791                 rxvq->packets = 0;
 792                 rxvq->bytes = 0;
 793                 rxvq->errors = 0;
 794                 rxvq->multicast = 0;
 795                 rxvq->broadcast = 0;
 796                 memset(rxvq->size_bins, 0, sizeof(rxvq->size_bins[0]) * 8);
 797         }
 798 }
 799
 800 static void
 801 virtio_set_hwaddr(struct virtio_hw *hw)
 802 {
 803         vtpci_write_dev_config(hw,
 804                         offsetof(struct virtio_net_config, mac),
 805                         &hw->mac_addr, ETHER_ADDR_LEN);
 806 }
 807
 808 static void
 809 virtio_get_hwaddr(struct virtio_hw *hw)
 810 {
 811         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 812                 vtpci_read_dev_config(hw,
 813                         offsetof(struct virtio_net_config, mac),
 814                         &hw->mac_addr, ETHER_ADDR_LEN);
 815         } else {
 816                 eth_random_addr(&hw->mac_addr[0]);
 817                 virtio_set_hwaddr(hw);
 818         }
 819 }
 820
 821 static void
 822 virtio_mac_table_set(struct virtio_hw *hw,
 823                      const struct virtio_net_ctrl_mac *uc,
 824                      const struct virtio_net_ctrl_mac *mc)
 825 {
 826         struct virtio_pmd_ctrl ctrl;
 827         int err, len[2];
 828
 829         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 830                 PMD_DRV_LOG(INFO, "host does not support mac table\n");
 831                 return;
 832         }
 833
 834         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 835         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 836
 837         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 838         memcpy(ctrl.data, uc, len[0]);
 839
 840         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 841         memcpy(ctrl.data + len[0], mc, len[1]);
 842
 843         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 844         if (err != 0)
 845                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 846 }
 847
 848 static void
 849 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 850                     uint32_t index, uint32_t vmdq __rte_unused)
 851 {
 852         struct virtio_hw *hw = dev->data->dev_private;
 853         const struct ether_addr *addrs = dev->data->mac_addrs;
 854         unsigned int i;
 855         struct virtio_net_ctrl_mac *uc, *mc;
 856
 857         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 858                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 859                 return;
 860         }
 861
 862         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 863         uc->entries = 0;
 864         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 865         mc->entries = 0;
 866
 867         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 868                 const struct ether_addr *addr
 869                         = (i == index) ? mac_addr : addrs + i;
 870                 struct virtio_net_ctrl_mac *tbl
 871                         = is_multicast_ether_addr(addr) ? mc : uc;
 872
 873                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 874         }
 875
 876         virtio_mac_table_set(hw, uc, mc);
 877 }
 878
 879 static void
 880 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 881 {
 882         struct virtio_hw *hw = dev->data->dev_private;
 883         struct ether_addr *addrs = dev->data->mac_addrs;
 884         struct virtio_net_ctrl_mac *uc, *mc;
 885         unsigned int i;
 886
 887         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 888                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 889                 return;
 890         }
 891
 892         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 893         uc->entries = 0;
 894         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 895         mc->entries = 0;
 896
 897         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 898                 struct virtio_net_ctrl_mac *tbl;
 899
 900                 if (i == index || is_zero_ether_addr(addrs + i))
 901                         continue;
 902
 903                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
 904                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
 905         }
 906
 907         virtio_mac_table_set(hw, uc, mc);
 908 }
 909
 910 static void
 911 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
 912 {
 913         struct virtio_hw *hw = dev->data->dev_private;
 914
 915         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
 916
 917         /* Use atomic update if available */
 918         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 919                 struct virtio_pmd_ctrl ctrl;
 920                 int len = ETHER_ADDR_LEN;
 921
 922                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 923                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
 924
 925                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
 926                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
 927         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
 928                 virtio_set_hwaddr(hw);
 929 }
 930
 931 static int
 932 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 933 {
 934         struct virtio_hw *hw = dev->data->dev_private;
 935         struct virtio_pmd_ctrl ctrl;
 936         int len;
 937
 938         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
 939                 return -ENOTSUP;
 940
 941         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
 942         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
 943         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
 944         len = sizeof(vlan_id);
 945
 946         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
 947 }
 948
 949 static int
 950 virtio_negotiate_features(struct virtio_hw *hw)
 951 {
 952         uint64_t host_features;
 953
 954         /* Prepare guest_features: feature that driver wants to support */
 955         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
 956         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
 957                 hw->guest_features);
 958
 959         /* Read device(host) feature bits */
 960         host_features = hw->vtpci_ops->get_features(hw);
 961         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
 962                 host_features);
 963
 964         /*
 965          * Negotiate features: Subset of device feature bits are written back
 966          * guest feature bits.
 967          */
 968         hw->guest_features = vtpci_negotiate_features(hw, host_features);
 969         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
 970                 hw->guest_features);
 971
 972         if (hw->modern) {
 973                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
 974                         PMD_INIT_LOG(ERR,
 975                                 "VIRTIO_F_VERSION_1 features is not enabled.");
 976                         return -1;
 977                 }
 978                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
 979                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
 980                         PMD_INIT_LOG(ERR,
 981                                 "failed to set FEATURES_OK status!");
 982                         return -1;
 983                 }
 984         }
 985
 986         return 0;
 987 }
 988
 989 /*
 990  * Process Virtio Config changed interrupt and call the callback
 991  * if link state changed.
 992  */
 993 static void
 994 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
 995                          void *param)
 996 {
 997         struct rte_eth_dev *dev = param;
 998         struct virtio_hw *hw = dev->data->dev_private;
 999         uint8_t isr;
1000
1001         /* Read interrupt status which clears interrupt */
1002         isr = vtpci_isr(hw);
1003         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1004
1005         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1006                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1007
1008         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1009                 if (virtio_dev_link_update(dev, 0) == 0)
1010                         _rte_eth_dev_callback_process(dev,
1011                                                       RTE_ETH_EVENT_INTR_LSC);
1012         }
1013
1014 }
1015
1016 static void
1017 rx_func_get(struct rte_eth_dev *eth_dev)
1018 {
1019         struct virtio_hw *hw = eth_dev->data->dev_private;
1020         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1021                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1022         else
1023                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1024 }
1025
1026 /*
1027  * This function is based on probe() function in virtio_pci.c
1028  * It returns 0 on success.
1029  */
1030 static int
1031 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1032 {
1033         struct virtio_hw *hw = eth_dev->data->dev_private;
1034         struct virtio_net_config *config;
1035         struct virtio_net_config local_config;
1036         struct rte_pci_device *pci_dev;
1037         int ret;
1038
1039         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
1040
1041         eth_dev->dev_ops = &virtio_eth_dev_ops;
1042         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1043
1044         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1045                 rx_func_get(eth_dev);
1046                 return 0;
1047         }
1048
1049         /* Allocate memory for storing MAC addresses */
1050         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1051         if (eth_dev->data->mac_addrs == NULL) {
1052                 PMD_INIT_LOG(ERR,
1053                         "Failed to allocate %d bytes needed to store MAC addresses",
1054                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1055                 return -ENOMEM;
1056         }
1057
1058         pci_dev = eth_dev->pci_dev;
1059
1060         ret = vtpci_init(pci_dev, hw);
1061         if (ret)
1062                 return ret;
1063
1064         /* Reset the device although not necessary at startup */
1065         vtpci_reset(hw);
1066
1067         /* Tell the host we've noticed this device. */
1068         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1069
1070         /* Tell the host we've known how to drive the device. */
1071         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1072         if (virtio_negotiate_features(hw) < 0)
1073                 return -1;
1074
1075         /* If host does not support status then disable LSC */
1076         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1077                 pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1078
1079         rte_eth_copy_pci_info(eth_dev, pci_dev);
1080
1081         rx_func_get(eth_dev);
1082
1083         /* Setting up rx_header size for the device */
1084         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1085             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1086                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1087         else
1088                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1089
1090         /* Copy the permanent MAC address to: virtio_hw */
1091         virtio_get_hwaddr(hw);
1092         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1093                         &eth_dev->data->mac_addrs[0]);
1094         PMD_INIT_LOG(DEBUG,
1095                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1096                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1097                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1098
1099         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1100                 config = &local_config;
1101
1102                 vtpci_read_dev_config(hw,
1103                         offsetof(struct virtio_net_config, mac),
1104                         &config->mac, sizeof(config->mac));
1105
1106                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1107                         vtpci_read_dev_config(hw,
1108                                 offsetof(struct virtio_net_config, status),
1109                                 &config->status, sizeof(config->status));
1110                 } else {
1111                         PMD_INIT_LOG(DEBUG,
1112                                      "VIRTIO_NET_F_STATUS is not supported");
1113                         config->status = 0;
1114                 }
1115
1116                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1117                         vtpci_read_dev_config(hw,
1118                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1119                                 &config->max_virtqueue_pairs,
1120                                 sizeof(config->max_virtqueue_pairs));
1121                 } else {
1122                         PMD_INIT_LOG(DEBUG,
1123                                      "VIRTIO_NET_F_MQ is not supported");
1124                         config->max_virtqueue_pairs = 1;
1125                 }
1126
1127                 hw->max_rx_queues =
1128                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1129                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1130                 hw->max_tx_queues =
1131                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1132                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1133
1134                 virtio_dev_cq_queue_setup(eth_dev,
1135                                         config->max_virtqueue_pairs * 2,
1136                                         SOCKET_ID_ANY);
1137
1138                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1139                                 config->max_virtqueue_pairs);
1140                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1141                 PMD_INIT_LOG(DEBUG,
1142                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1143                                 config->mac[0], config->mac[1],
1144                                 config->mac[2], config->mac[3],
1145                                 config->mac[4], config->mac[5]);
1146         } else {
1147                 hw->max_rx_queues = 1;
1148                 hw->max_tx_queues = 1;
1149         }
1150
1151         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1152                         hw->max_rx_queues, hw->max_tx_queues);
1153         PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1154                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1155                         pci_dev->id.device_id);
1156
1157         /* Setup interrupt callback  */
1158         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1159                 rte_intr_callback_register(&pci_dev->intr_handle,
1160                                    virtio_interrupt_handler, eth_dev);
1161
1162         virtio_dev_cq_start(eth_dev);
1163
1164         return 0;
1165 }
1166
1167 static int
1168 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1169 {
1170         struct rte_pci_device *pci_dev;
1171         struct virtio_hw *hw = eth_dev->data->dev_private;
1172
1173         PMD_INIT_FUNC_TRACE();
1174
1175         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1176                 return -EPERM;
1177
1178         /* Close it anyway since there's no way to know if closed */
1179         virtio_dev_close(eth_dev);
1180
1181         pci_dev = eth_dev->pci_dev;
1182
1183         eth_dev->dev_ops = NULL;
1184         eth_dev->tx_pkt_burst = NULL;
1185         eth_dev->rx_pkt_burst = NULL;
1186
1187         virtio_dev_queue_release(hw->cvq);
1188
1189         rte_free(eth_dev->data->mac_addrs);
1190         eth_dev->data->mac_addrs = NULL;
1191
1192         /* reset interrupt callback  */
1193         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1194                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1195                                                 virtio_interrupt_handler,
1196                                                 eth_dev);
1197         rte_eal_pci_unmap_device(pci_dev);
1198
1199         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1200
1201         return 0;
1202 }
1203
1204 static struct eth_driver rte_virtio_pmd = {
1205         .pci_drv = {
1206                 .name = "rte_virtio_pmd",
1207                 .id_table = pci_id_virtio_map,
1208                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1209         },
1210         .eth_dev_init = eth_virtio_dev_init,
1211         .eth_dev_uninit = eth_virtio_dev_uninit,
1212         .dev_private_size = sizeof(struct virtio_hw),
1213 };
1214
1215 /*
1216  * Driver initialization routine.
1217  * Invoked once at EAL init time.
1218  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1219  * Returns 0 on success.
1220  */
1221 static int
1222 rte_virtio_pmd_init(const char *name __rte_unused,
1223                     const char *param __rte_unused)
1224 {
1225         if (rte_eal_iopl_init() != 0) {
1226                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1227                 return -1;
1228         }
1229
1230         rte_eth_driver_register(&rte_virtio_pmd);
1231         return 0;
1232 }
1233
1234 /*
1235  * Configure virtio device
1236  * It returns 0 on success.
1237  */
1238 static int
1239 virtio_dev_configure(struct rte_eth_dev *dev)
1240 {
1241         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1242         struct virtio_hw *hw = dev->data->dev_private;
1243         struct rte_pci_device *pci_dev = dev->pci_dev;
1244
1245         PMD_INIT_LOG(DEBUG, "configure");
1246
1247         if (rxmode->hw_ip_checksum) {
1248                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1249                 return -EINVAL;
1250         }
1251
1252         hw->vlan_strip = rxmode->hw_vlan_strip;
1253
1254         if (rxmode->hw_vlan_filter
1255             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1256                 PMD_DRV_LOG(NOTICE,
1257                             "vlan filtering not available on this host");
1258                 return -ENOTSUP;
1259         }
1260
1261         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1262                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1263                         PMD_DRV_LOG(ERR, "failed to set config vector");
1264                         return -EBUSY;
1265                 }
1266
1267         return 0;
1268 }
1269
1270
1271 static int
1272 virtio_dev_start(struct rte_eth_dev *dev)
1273 {
1274         uint16_t nb_queues, i;
1275         struct virtio_hw *hw = dev->data->dev_private;
1276         struct rte_pci_device *pci_dev = dev->pci_dev;
1277
1278         /* check if lsc interrupt feature is enabled */
1279         if (dev->data->dev_conf.intr_conf.lsc) {
1280                 if (!(pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
1281                         PMD_DRV_LOG(ERR, "link status not supported by host");
1282                         return -ENOTSUP;
1283                 }
1284
1285                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1286                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1287                         return -EIO;
1288                 }
1289         }
1290
1291         /* Initialize Link state */
1292         virtio_dev_link_update(dev, 0);
1293
1294         /* On restart after stop do not touch queues */
1295         if (hw->started)
1296                 return 0;
1297
1298         /* Do final configuration before rx/tx engine starts */
1299         virtio_dev_rxtx_start(dev);
1300         vtpci_reinit_complete(hw);
1301
1302         hw->started = 1;
1303
1304         /*Notify the backend
1305          *Otherwise the tap backend might already stop its queue due to fullness.
1306          *vhost backend will have no chance to be waked up
1307          */
1308         nb_queues = dev->data->nb_rx_queues;
1309         if (nb_queues > 1) {
1310                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1311                         return -EINVAL;
1312         }
1313
1314         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1315
1316         for (i = 0; i < nb_queues; i++)
1317                 virtqueue_notify(dev->data->rx_queues[i]);
1318
1319         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1320
1321         for (i = 0; i < dev->data->nb_rx_queues; i++)
1322                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1323
1324         for (i = 0; i < dev->data->nb_tx_queues; i++)
1325                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1326
1327         return 0;
1328 }
1329
1330 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1331 {
1332         struct rte_mbuf *buf;
1333         int i, mbuf_num = 0;
1334
1335         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1336                 PMD_INIT_LOG(DEBUG,
1337                              "Before freeing rxq[%d] used and unused buf", i);
1338                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1339
1340                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p",
1341                                 i, dev->data->rx_queues[i]);
1342                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1343                                         dev->data->rx_queues[i])) != NULL) {
1344                         rte_pktmbuf_free(buf);
1345                         mbuf_num++;
1346                 }
1347
1348                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1349                 PMD_INIT_LOG(DEBUG,
1350                              "After freeing rxq[%d] used and unused buf", i);
1351                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1352         }
1353
1354         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1355                 PMD_INIT_LOG(DEBUG,
1356                              "Before freeing txq[%d] used and unused bufs",
1357                              i);
1358                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1359
1360                 mbuf_num = 0;
1361                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1362                                         dev->data->tx_queues[i])) != NULL) {
1363                         rte_pktmbuf_free(buf);
1364
1365                         mbuf_num++;
1366                 }
1367
1368                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1369                 PMD_INIT_LOG(DEBUG,
1370                              "After freeing txq[%d] used and unused buf", i);
1371                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1372         }
1373 }
1374
1375 /*
1376  * Stop device: disable interrupt and mark link down
1377  */
1378 static void
1379 virtio_dev_stop(struct rte_eth_dev *dev)
1380 {
1381         struct rte_eth_link link;
1382         struct virtio_hw *hw = dev->data->dev_private;
1383
1384         PMD_INIT_LOG(DEBUG, "stop");
1385
1386         hw->started = 0;
1387
1388         if (dev->data->dev_conf.intr_conf.lsc)
1389                 rte_intr_disable(&dev->pci_dev->intr_handle);
1390
1391         memset(&link, 0, sizeof(link));
1392         virtio_dev_atomic_write_link_status(dev, &link);
1393 }
1394
1395 static int
1396 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1397 {
1398         struct rte_eth_link link, old;
1399         uint16_t status;
1400         struct virtio_hw *hw = dev->data->dev_private;
1401         memset(&link, 0, sizeof(link));
1402         virtio_dev_atomic_read_link_status(dev, &link);
1403         old = link;
1404         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1405         link.link_speed  = SPEED_10G;
1406
1407         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1408                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1409                 vtpci_read_dev_config(hw,
1410                                 offsetof(struct virtio_net_config, status),
1411                                 &status, sizeof(status));
1412                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1413                         link.link_status = ETH_LINK_DOWN;
1414                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1415                                      dev->data->port_id);
1416                 } else {
1417                         link.link_status = ETH_LINK_UP;
1418                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1419                                      dev->data->port_id);
1420                 }
1421         } else {
1422                 link.link_status = ETH_LINK_UP;
1423         }
1424         virtio_dev_atomic_write_link_status(dev, &link);
1425
1426         return (old.link_status == link.link_status) ? -1 : 0;
1427 }
1428
1429 static void
1430 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1431 {
1432         struct virtio_hw *hw = dev->data->dev_private;
1433
1434         dev_info->driver_name = dev->driver->pci_drv.name;
1435         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1436         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1437         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1438         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1439         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1440         dev_info->default_txconf = (struct rte_eth_txconf) {
1441                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1442         };
1443 }
1444
1445 /*
1446  * It enables testpmd to collect per queue stats.
1447  */
1448 static int
1449 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1450 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1451 __rte_unused uint8_t is_rx)
1452 {
1453         return 0;
1454 }
1455
1456 static struct rte_driver rte_virtio_driver = {
1457         .type = PMD_PDEV,
1458         .init = rte_virtio_pmd_init,
1459 };
1460
1461 PMD_REGISTER_DRIVER(rte_virtio_driver);