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 static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
  63 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  64 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  65 static int  virtio_dev_start(struct rte_eth_dev *dev);
  66 static void virtio_dev_stop(struct rte_eth_dev *dev);
  67 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  68 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  69 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  70 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  71 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  72                                 struct rte_eth_dev_info *dev_info);
  73 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  74         __rte_unused int wait_to_complete);
  75
  76 static void virtio_set_hwaddr(struct virtio_hw *hw);
  77 static void virtio_get_hwaddr(struct virtio_hw *hw);
  78
  79 static void virtio_dev_stats_get(struct rte_eth_dev *dev,
  80                                  struct rte_eth_stats *stats);
  81 static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
  82                                  struct rte_eth_xstats *xstats, unsigned n);
  83 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  84 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  85 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  86                                 uint16_t vlan_id, int on);
  87 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  88                                 struct ether_addr *mac_addr,
  89                                 uint32_t index, uint32_t vmdq __rte_unused);
  90 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  91 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  92                                 struct ether_addr *mac_addr);
  93
  94 static int virtio_dev_queue_stats_mapping_set(
  95         __rte_unused struct rte_eth_dev *eth_dev,
  96         __rte_unused uint16_t queue_id,
  97         __rte_unused uint8_t stat_idx,
  98         __rte_unused uint8_t is_rx);
  99
 100 /*
 101  * The set of PCI devices this driver supports
 102  */
 103 static const struct rte_pci_id pci_id_virtio_map[] = {
 104
 105 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
 106 #include "rte_pci_dev_ids.h"
 107
 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_q_stat_strings[] = {
 118         {"good_packets",           offsetof(struct virtqueue, packets)},
 119         {"good_bytes",             offsetof(struct virtqueue, bytes)},
 120         {"errors",                 offsetof(struct virtqueue, errors)},
 121         {"multicast_packets",      offsetof(struct virtqueue, multicast)},
 122         {"broadcast_packets",      offsetof(struct virtqueue, broadcast)},
 123         {"undersize_packets",      offsetof(struct virtqueue, size_bins[0])},
 124         {"size_64_packets",        offsetof(struct virtqueue, size_bins[1])},
 125         {"size_65_127_packets",    offsetof(struct virtqueue, size_bins[2])},
 126         {"size_128_255_packets",   offsetof(struct virtqueue, size_bins[3])},
 127         {"size_256_511_packets",   offsetof(struct virtqueue, size_bins[4])},
 128         {"size_512_1023_packets",  offsetof(struct virtqueue, size_bins[5])},
 129         {"size_1024_1517_packets", offsetof(struct virtqueue, size_bins[6])},
 130         {"size_1518_max_packets",  offsetof(struct virtqueue, size_bins[7])},
 131 };
 132
 133 #define VIRTIO_NB_Q_XSTATS (sizeof(rte_virtio_q_stat_strings) / \
 134                             sizeof(rte_virtio_q_stat_strings[0]))
 135
 136 static int
 137 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
 138                 int *dlen, int pkt_num)
 139 {
 140         uint32_t head, i;
 141         int k, sum = 0;
 142         virtio_net_ctrl_ack status = ~0;
 143         struct virtio_pmd_ctrl result;
 144
 145         ctrl->status = status;
 146
 147         if (!(vq && vq->hw->cvq)) {
 148                 PMD_INIT_LOG(ERR, "Control queue is not supported.");
 149                 return -1;
 150         }
 151         head = vq->vq_desc_head_idx;
 152
 153         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 154                 "vq->hw->cvq = %p vq = %p",
 155                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 156
 157         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 158                 return -1;
 159
 160         memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
 161                 sizeof(struct virtio_pmd_ctrl));
 162
 163         /*
 164          * Format is enforced in qemu code:
 165          * One TX packet for header;
 166          * At least one TX packet per argument;
 167          * One RX packet for ACK.
 168          */
 169         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 170         vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
 171         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 172         vq->vq_free_cnt--;
 173         i = vq->vq_ring.desc[head].next;
 174
 175         for (k = 0; k < pkt_num; k++) {
 176                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 177                 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 178                         + sizeof(struct virtio_net_ctrl_hdr)
 179                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 180                 vq->vq_ring.desc[i].len = dlen[k];
 181                 sum += dlen[k];
 182                 vq->vq_free_cnt--;
 183                 i = vq->vq_ring.desc[i].next;
 184         }
 185
 186         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 187         vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 188                         + sizeof(struct virtio_net_ctrl_hdr);
 189         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 190         vq->vq_free_cnt--;
 191
 192         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 193
 194         vq_update_avail_ring(vq, head);
 195         vq_update_avail_idx(vq);
 196
 197         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 198
 199         virtqueue_notify(vq);
 200
 201         rte_rmb();
 202         while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
 203                 rte_rmb();
 204                 usleep(100);
 205         }
 206
 207         while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
 208                 uint32_t idx, desc_idx, used_idx;
 209                 struct vring_used_elem *uep;
 210
 211                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 212                                 & (vq->vq_nentries - 1));
 213                 uep = &vq->vq_ring.used->ring[used_idx];
 214                 idx = (uint32_t) uep->id;
 215                 desc_idx = idx;
 216
 217                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 218                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 219                         vq->vq_free_cnt++;
 220                 }
 221
 222                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 223                 vq->vq_desc_head_idx = idx;
 224
 225                 vq->vq_used_cons_idx++;
 226                 vq->vq_free_cnt++;
 227         }
 228
 229         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 230                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 231
 232         memcpy(&result, vq->virtio_net_hdr_mz->addr,
 233                         sizeof(struct virtio_pmd_ctrl));
 234
 235         return result.status;
 236 }
 237
 238 static int
 239 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 240 {
 241         struct virtio_hw *hw = dev->data->dev_private;
 242         struct virtio_pmd_ctrl ctrl;
 243         int dlen[1];
 244         int ret;
 245
 246         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 247         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 248         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 249
 250         dlen[0] = sizeof(uint16_t);
 251
 252         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 253         if (ret) {
 254                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 255                           "failed, this is too late now...");
 256                 return -EINVAL;
 257         }
 258
 259         return 0;
 260 }
 261
 262 void
 263 virtio_dev_queue_release(struct virtqueue *vq)
 264 {
 265         struct virtio_hw *hw;
 266
 267         if (vq) {
 268                 hw = vq->hw;
 269                 if (vq->configured)
 270                         hw->vtpci_ops->del_queue(hw, vq);
 271
 272                 rte_memzone_free(vq->mz);
 273                 if (vq->virtio_net_hdr_mz)
 274                         rte_memzone_free(vq->virtio_net_hdr_mz);
 275
 276                 rte_free(vq->sw_ring);
 277                 rte_free(vq);
 278         }
 279 }
 280
 281 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 282                         int queue_type,
 283                         uint16_t queue_idx,
 284                         uint16_t vtpci_queue_idx,
 285                         uint16_t nb_desc,
 286                         unsigned int socket_id,
 287                         struct virtqueue **pvq)
 288 {
 289         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 290         const struct rte_memzone *mz;
 291         unsigned int vq_size, size;
 292         struct virtio_hw *hw = dev->data->dev_private;
 293         struct virtqueue *vq = NULL;
 294         const char *queue_names[] = {"rvq", "txq", "cvq"};
 295
 296         PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
 297
 298         /*
 299          * Read the virtqueue size from the Queue Size field
 300          * Always power of 2 and if 0 virtqueue does not exist
 301          */
 302         vq_size = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx);
 303         PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc);
 304         if (vq_size == 0) {
 305                 PMD_INIT_LOG(ERR, "virtqueue does not exist");
 306                 return -EINVAL;
 307         }
 308
 309         if (!rte_is_power_of_2(vq_size)) {
 310                 PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
 311                 return -EINVAL;
 312         }
 313
 314         snprintf(vq_name, sizeof(vq_name), "port%d_%s%d",
 315                  dev->data->port_id, queue_names[queue_type], queue_idx);
 316         vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 317                          vq_size * sizeof(struct vq_desc_extra),
 318                          RTE_CACHE_LINE_SIZE);
 319         if (vq == NULL) {
 320                 PMD_INIT_LOG(ERR, "Can not allocate virtqueue");
 321                 return -ENOMEM;
 322         }
 323
 324         if (queue_type == VTNET_RQ) {
 325                 size_t sz_sw;
 326
 327                 sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
 328                         sizeof(vq->sw_ring[0]);
 329                 vq->sw_ring = rte_zmalloc_socket("rxq->sw_ring", sz_sw,
 330                                                  RTE_CACHE_LINE_SIZE,
 331                                                  socket_id);
 332                 if (!vq->sw_ring) {
 333                         PMD_INIT_LOG(ERR, "Can not allocate RX soft ring");
 334                         virtio_dev_queue_release(vq);
 335                         return -ENOMEM;
 336                 }
 337         }
 338
 339         vq->hw = hw;
 340         vq->port_id = dev->data->port_id;
 341         vq->queue_id = queue_idx;
 342         vq->vq_queue_index = vtpci_queue_idx;
 343         vq->vq_nentries = vq_size;
 344
 345         if (nb_desc == 0 || nb_desc > vq_size)
 346                 nb_desc = vq_size;
 347         vq->vq_free_cnt = nb_desc;
 348
 349         /*
 350          * Reserve a memzone for vring elements
 351          */
 352         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 353         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 354         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
 355
 356         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 357                 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
 358         if (mz == NULL) {
 359                 if (rte_errno == EEXIST)
 360                         mz = rte_memzone_lookup(vq_name);
 361                 if (mz == NULL) {
 362                         virtio_dev_queue_release(vq);
 363                         return -ENOMEM;
 364                 }
 365         }
 366
 367         /*
 368          * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
 369          * and only accepts 32 bit page frame number.
 370          * Check if the allocated physical memory exceeds 16TB.
 371          */
 372         if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
 373                 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
 374                 virtio_dev_queue_release(vq);
 375                 return -ENOMEM;
 376         }
 377
 378         memset(mz->addr, 0, sizeof(mz->len));
 379         vq->mz = mz;
 380         vq->vq_ring_mem = mz->phys_addr;
 381         vq->vq_ring_virt_mem = mz->addr;
 382         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64, (uint64_t)mz->phys_addr);
 383         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
 384         vq->virtio_net_hdr_mz  = NULL;
 385         vq->virtio_net_hdr_mem = 0;
 386
 387         if (queue_type == VTNET_TQ) {
 388                 const struct rte_memzone *hdr_mz;
 389                 struct virtio_tx_region *txr;
 390                 unsigned int i;
 391
 392                 /*
 393                  * For each xmit packet, allocate a virtio_net_hdr
 394                  * and indirect ring elements
 395                  */
 396                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
 397                          dev->data->port_id, queue_idx);
 398                 hdr_mz = rte_memzone_reserve_aligned(vq_name,
 399                                                      vq_size * sizeof(*txr),
 400                                                      socket_id, 0,
 401                                                      RTE_CACHE_LINE_SIZE);
 402                 if (hdr_mz == NULL) {
 403                         if (rte_errno == EEXIST)
 404                                 hdr_mz = rte_memzone_lookup(vq_name);
 405                         if (hdr_mz == NULL) {
 406                                 virtio_dev_queue_release(vq);
 407                                 return -ENOMEM;
 408                         }
 409                 }
 410                 vq->virtio_net_hdr_mz = hdr_mz;
 411                 vq->virtio_net_hdr_mem = hdr_mz->phys_addr;
 412
 413                 txr = hdr_mz->addr;
 414                 memset(txr, 0, vq_size * sizeof(*txr));
 415                 for (i = 0; i < vq_size; i++) {
 416                         struct vring_desc *start_dp = txr[i].tx_indir;
 417
 418                         vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
 419
 420                         /* first indirect descriptor is always the tx header */
 421                         start_dp->addr = vq->virtio_net_hdr_mem
 422                                 + i * sizeof(*txr)
 423                                 + offsetof(struct virtio_tx_region, tx_hdr);
 424
 425                         start_dp->len = vq->hw->vtnet_hdr_size;
 426                         start_dp->flags = VRING_DESC_F_NEXT;
 427                 }
 428
 429         } else if (queue_type == VTNET_CQ) {
 430                 /* Allocate a page for control vq command, data and status */
 431                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
 432                         dev->data->port_id);
 433                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 434                         PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
 435                 if (vq->virtio_net_hdr_mz == NULL) {
 436                         if (rte_errno == EEXIST)
 437                                 vq->virtio_net_hdr_mz =
 438                                         rte_memzone_lookup(vq_name);
 439                         if (vq->virtio_net_hdr_mz == NULL) {
 440                                 virtio_dev_queue_release(vq);
 441                                 return -ENOMEM;
 442                         }
 443                 }
 444                 vq->virtio_net_hdr_mem =
 445                         vq->virtio_net_hdr_mz->phys_addr;
 446                 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 447         }
 448
 449         hw->vtpci_ops->setup_queue(hw, vq);
 450
 451         vq->configured = 1;
 452         *pvq = vq;
 453         return 0;
 454 }
 455
 456 static int
 457 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 458                 uint32_t socket_id)
 459 {
 460         struct virtqueue *vq;
 461         int ret;
 462         struct virtio_hw *hw = dev->data->dev_private;
 463
 464         PMD_INIT_FUNC_TRACE();
 465         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 466                         vtpci_queue_idx, 0, socket_id, &vq);
 467         if (ret < 0) {
 468                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 469                 return ret;
 470         }
 471
 472         hw->cvq = vq;
 473         return 0;
 474 }
 475
 476 static void
 477 virtio_free_queues(struct rte_eth_dev *dev)
 478 {
 479         unsigned int i;
 480
 481         for (i = 0; i < dev->data->nb_rx_queues; i++)
 482                 virtio_dev_rx_queue_release(dev->data->rx_queues[i]);
 483
 484         dev->data->nb_rx_queues = 0;
 485
 486         for (i = 0; i < dev->data->nb_tx_queues; i++)
 487                 virtio_dev_tx_queue_release(dev->data->tx_queues[i]);
 488
 489         dev->data->nb_tx_queues = 0;
 490 }
 491
 492 static void
 493 virtio_dev_close(struct rte_eth_dev *dev)
 494 {
 495         struct virtio_hw *hw = dev->data->dev_private;
 496
 497         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 498
 499         if (hw->started == 1)
 500                 virtio_dev_stop(dev);
 501
 502         /* reset the NIC */
 503         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
 504                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 505         vtpci_reset(hw);
 506         virtio_dev_free_mbufs(dev);
 507         virtio_free_queues(dev);
 508 }
 509
 510 static void
 511 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 512 {
 513         struct virtio_hw *hw = dev->data->dev_private;
 514         struct virtio_pmd_ctrl ctrl;
 515         int dlen[1];
 516         int ret;
 517
 518         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 519                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 520                 return;
 521         }
 522
 523         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 524         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 525         ctrl.data[0] = 1;
 526         dlen[0] = 1;
 527
 528         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 529         if (ret)
 530                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 531 }
 532
 533 static void
 534 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 535 {
 536         struct virtio_hw *hw = dev->data->dev_private;
 537         struct virtio_pmd_ctrl ctrl;
 538         int dlen[1];
 539         int ret;
 540
 541         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 542                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 543                 return;
 544         }
 545
 546         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 547         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 548         ctrl.data[0] = 0;
 549         dlen[0] = 1;
 550
 551         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 552         if (ret)
 553                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 554 }
 555
 556 static void
 557 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 558 {
 559         struct virtio_hw *hw = dev->data->dev_private;
 560         struct virtio_pmd_ctrl ctrl;
 561         int dlen[1];
 562         int ret;
 563
 564         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 565                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 566                 return;
 567         }
 568
 569         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 570         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 571         ctrl.data[0] = 1;
 572         dlen[0] = 1;
 573
 574         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 575         if (ret)
 576                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 577 }
 578
 579 static void
 580 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 581 {
 582         struct virtio_hw *hw = dev->data->dev_private;
 583         struct virtio_pmd_ctrl ctrl;
 584         int dlen[1];
 585         int ret;
 586
 587         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 588                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 589                 return;
 590         }
 591
 592         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 593         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 594         ctrl.data[0] = 0;
 595         dlen[0] = 1;
 596
 597         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 598         if (ret)
 599                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 600 }
 601
 602 /*
 603  * dev_ops for virtio, bare necessities for basic operation
 604  */
 605 static const struct eth_dev_ops virtio_eth_dev_ops = {
 606         .dev_configure           = virtio_dev_configure,
 607         .dev_start               = virtio_dev_start,
 608         .dev_stop                = virtio_dev_stop,
 609         .dev_close               = virtio_dev_close,
 610         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 611         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 612         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 613         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 614
 615         .dev_infos_get           = virtio_dev_info_get,
 616         .stats_get               = virtio_dev_stats_get,
 617         .xstats_get              = virtio_dev_xstats_get,
 618         .stats_reset             = virtio_dev_stats_reset,
 619         .xstats_reset            = virtio_dev_stats_reset,
 620         .link_update             = virtio_dev_link_update,
 621         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 622         .rx_queue_release        = virtio_dev_rx_queue_release,
 623         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 624         .tx_queue_release        = virtio_dev_tx_queue_release,
 625         /* collect stats per queue */
 626         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 627         .vlan_filter_set         = virtio_vlan_filter_set,
 628         .mac_addr_add            = virtio_mac_addr_add,
 629         .mac_addr_remove         = virtio_mac_addr_remove,
 630         .mac_addr_set            = virtio_mac_addr_set,
 631 };
 632
 633 static inline int
 634 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 635                                 struct rte_eth_link *link)
 636 {
 637         struct rte_eth_link *dst = link;
 638         struct rte_eth_link *src = &(dev->data->dev_link);
 639
 640         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 641                         *(uint64_t *)src) == 0)
 642                 return -1;
 643
 644         return 0;
 645 }
 646
 647 /**
 648  * Atomically writes the link status information into global
 649  * structure rte_eth_dev.
 650  *
 651  * @param dev
 652  *   - Pointer to the structure rte_eth_dev to read from.
 653  *   - Pointer to the buffer to be saved with the link status.
 654  *
 655  * @return
 656  *   - On success, zero.
 657  *   - On failure, negative value.
 658  */
 659 static inline int
 660 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 661                 struct rte_eth_link *link)
 662 {
 663         struct rte_eth_link *dst = &(dev->data->dev_link);
 664         struct rte_eth_link *src = link;
 665
 666         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 667                                         *(uint64_t *)src) == 0)
 668                 return -1;
 669
 670         return 0;
 671 }
 672
 673 static void
 674 virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 675 {
 676         unsigned i;
 677
 678         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 679                 const struct virtqueue *txvq = dev->data->tx_queues[i];
 680                 if (txvq == NULL)
 681                         continue;
 682
 683                 stats->opackets += txvq->packets;
 684                 stats->obytes += txvq->bytes;
 685                 stats->oerrors += txvq->errors;
 686
 687                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 688                         stats->q_opackets[i] = txvq->packets;
 689                         stats->q_obytes[i] = txvq->bytes;
 690                 }
 691         }
 692
 693         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 694                 const struct virtqueue *rxvq = dev->data->rx_queues[i];
 695                 if (rxvq == NULL)
 696                         continue;
 697
 698                 stats->ipackets += rxvq->packets;
 699                 stats->ibytes += rxvq->bytes;
 700                 stats->ierrors += rxvq->errors;
 701
 702                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 703                         stats->q_ipackets[i] = rxvq->packets;
 704                         stats->q_ibytes[i] = rxvq->bytes;
 705                 }
 706         }
 707
 708         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 709 }
 710
 711 static int
 712 virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstats *xstats,
 713                       unsigned n)
 714 {
 715         unsigned i;
 716         unsigned count = 0;
 717
 718         unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_Q_XSTATS +
 719                 dev->data->nb_rx_queues * VIRTIO_NB_Q_XSTATS;
 720
 721         if (n < nstats)
 722                 return nstats;
 723
 724         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 725                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 726
 727                 if (rxvq == NULL)
 728                         continue;
 729
 730                 unsigned t;
 731
 732                 for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) {
 733                         snprintf(xstats[count].name, sizeof(xstats[count].name),
 734                                  "rx_q%u_%s", i,
 735                                  rte_virtio_q_stat_strings[t].name);
 736                         xstats[count].value = *(uint64_t *)(((char *)rxvq) +
 737                                 rte_virtio_q_stat_strings[t].offset);
 738                         count++;
 739                 }
 740         }
 741
 742         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 743                 struct virtqueue *txvq = dev->data->tx_queues[i];
 744
 745                 if (txvq == NULL)
 746                         continue;
 747
 748                 unsigned t;
 749
 750                 for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) {
 751                         snprintf(xstats[count].name, sizeof(xstats[count].name),
 752                                  "tx_q%u_%s", i,
 753                                  rte_virtio_q_stat_strings[t].name);
 754                         xstats[count].value = *(uint64_t *)(((char *)txvq) +
 755                                 rte_virtio_q_stat_strings[t].offset);
 756                         count++;
 757                 }
 758         }
 759
 760         return count;
 761 }
 762
 763 static void
 764 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 765 {
 766         virtio_update_stats(dev, stats);
 767 }
 768
 769 static void
 770 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 771 {
 772         unsigned int i;
 773
 774         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 775                 struct virtqueue *txvq = dev->data->tx_queues[i];
 776                 if (txvq == NULL)
 777                         continue;
 778
 779                 txvq->packets = 0;
 780                 txvq->bytes = 0;
 781                 txvq->errors = 0;
 782                 txvq->multicast = 0;
 783                 txvq->broadcast = 0;
 784                 memset(txvq->size_bins, 0, sizeof(txvq->size_bins[0]) * 8);
 785         }
 786
 787         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 788                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 789                 if (rxvq == NULL)
 790                         continue;
 791
 792                 rxvq->packets = 0;
 793                 rxvq->bytes = 0;
 794                 rxvq->errors = 0;
 795                 rxvq->multicast = 0;
 796                 rxvq->broadcast = 0;
 797                 memset(rxvq->size_bins, 0, sizeof(rxvq->size_bins[0]) * 8);
 798         }
 799 }
 800
 801 static void
 802 virtio_set_hwaddr(struct virtio_hw *hw)
 803 {
 804         vtpci_write_dev_config(hw,
 805                         offsetof(struct virtio_net_config, mac),
 806                         &hw->mac_addr, ETHER_ADDR_LEN);
 807 }
 808
 809 static void
 810 virtio_get_hwaddr(struct virtio_hw *hw)
 811 {
 812         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 813                 vtpci_read_dev_config(hw,
 814                         offsetof(struct virtio_net_config, mac),
 815                         &hw->mac_addr, ETHER_ADDR_LEN);
 816         } else {
 817                 eth_random_addr(&hw->mac_addr[0]);
 818                 virtio_set_hwaddr(hw);
 819         }
 820 }
 821
 822 static void
 823 virtio_mac_table_set(struct virtio_hw *hw,
 824                      const struct virtio_net_ctrl_mac *uc,
 825                      const struct virtio_net_ctrl_mac *mc)
 826 {
 827         struct virtio_pmd_ctrl ctrl;
 828         int err, len[2];
 829
 830         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 831                 PMD_DRV_LOG(INFO, "host does not support mac table");
 832                 return;
 833         }
 834
 835         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 836         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 837
 838         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 839         memcpy(ctrl.data, uc, len[0]);
 840
 841         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 842         memcpy(ctrl.data + len[0], mc, len[1]);
 843
 844         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 845         if (err != 0)
 846                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 847 }
 848
 849 static void
 850 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 851                     uint32_t index, uint32_t vmdq __rte_unused)
 852 {
 853         struct virtio_hw *hw = dev->data->dev_private;
 854         const struct ether_addr *addrs = dev->data->mac_addrs;
 855         unsigned int i;
 856         struct virtio_net_ctrl_mac *uc, *mc;
 857
 858         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 859                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 860                 return;
 861         }
 862
 863         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 864         uc->entries = 0;
 865         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 866         mc->entries = 0;
 867
 868         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 869                 const struct ether_addr *addr
 870                         = (i == index) ? mac_addr : addrs + i;
 871                 struct virtio_net_ctrl_mac *tbl
 872                         = is_multicast_ether_addr(addr) ? mc : uc;
 873
 874                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 875         }
 876
 877         virtio_mac_table_set(hw, uc, mc);
 878 }
 879
 880 static void
 881 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 882 {
 883         struct virtio_hw *hw = dev->data->dev_private;
 884         struct ether_addr *addrs = dev->data->mac_addrs;
 885         struct virtio_net_ctrl_mac *uc, *mc;
 886         unsigned int i;
 887
 888         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 889                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 890                 return;
 891         }
 892
 893         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 894         uc->entries = 0;
 895         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 896         mc->entries = 0;
 897
 898         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 899                 struct virtio_net_ctrl_mac *tbl;
 900
 901                 if (i == index || is_zero_ether_addr(addrs + i))
 902                         continue;
 903
 904                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
 905                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
 906         }
 907
 908         virtio_mac_table_set(hw, uc, mc);
 909 }
 910
 911 static void
 912 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
 913 {
 914         struct virtio_hw *hw = dev->data->dev_private;
 915
 916         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
 917
 918         /* Use atomic update if available */
 919         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 920                 struct virtio_pmd_ctrl ctrl;
 921                 int len = ETHER_ADDR_LEN;
 922
 923                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 924                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
 925
 926                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
 927                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
 928         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
 929                 virtio_set_hwaddr(hw);
 930 }
 931
 932 static int
 933 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 934 {
 935         struct virtio_hw *hw = dev->data->dev_private;
 936         struct virtio_pmd_ctrl ctrl;
 937         int len;
 938
 939         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
 940                 return -ENOTSUP;
 941
 942         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
 943         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
 944         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
 945         len = sizeof(vlan_id);
 946
 947         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
 948 }
 949
 950 static int
 951 virtio_negotiate_features(struct virtio_hw *hw)
 952 {
 953         uint64_t host_features;
 954
 955         /* Prepare guest_features: feature that driver wants to support */
 956         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
 957         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
 958                 hw->guest_features);
 959
 960         /* Read device(host) feature bits */
 961         host_features = hw->vtpci_ops->get_features(hw);
 962         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
 963                 host_features);
 964
 965         /*
 966          * Negotiate features: Subset of device feature bits are written back
 967          * guest feature bits.
 968          */
 969         hw->guest_features = vtpci_negotiate_features(hw, host_features);
 970         PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
 971                 hw->guest_features);
 972
 973         if (hw->modern) {
 974                 if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
 975                         PMD_INIT_LOG(ERR,
 976                                 "VIRTIO_F_VERSION_1 features is not enabled.");
 977                         return -1;
 978                 }
 979                 vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
 980                 if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
 981                         PMD_INIT_LOG(ERR,
 982                                 "failed to set FEATURES_OK status!");
 983                         return -1;
 984                 }
 985         }
 986
 987         return 0;
 988 }
 989
 990 /*
 991  * Process Virtio Config changed interrupt and call the callback
 992  * if link state changed.
 993  */
 994 static void
 995 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
 996                          void *param)
 997 {
 998         struct rte_eth_dev *dev = param;
 999         struct virtio_hw *hw = dev->data->dev_private;
1000         uint8_t isr;
1001
1002         /* Read interrupt status which clears interrupt */
1003         isr = vtpci_isr(hw);
1004         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1005
1006         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1007                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1008
1009         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1010                 if (virtio_dev_link_update(dev, 0) == 0)
1011                         _rte_eth_dev_callback_process(dev,
1012                                                       RTE_ETH_EVENT_INTR_LSC);
1013         }
1014
1015 }
1016
1017 static void
1018 rx_func_get(struct rte_eth_dev *eth_dev)
1019 {
1020         struct virtio_hw *hw = eth_dev->data->dev_private;
1021         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1022                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1023         else
1024                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1025 }
1026
1027 /*
1028  * This function is based on probe() function in virtio_pci.c
1029  * It returns 0 on success.
1030  */
1031 static int
1032 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1033 {
1034         struct virtio_hw *hw = eth_dev->data->dev_private;
1035         struct virtio_net_config *config;
1036         struct virtio_net_config local_config;
1037         struct rte_pci_device *pci_dev;
1038         uint32_t dev_flags = RTE_ETH_DEV_DETACHABLE;
1039         int ret;
1040
1041         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
1042
1043         eth_dev->dev_ops = &virtio_eth_dev_ops;
1044         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1045
1046         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1047                 rx_func_get(eth_dev);
1048                 return 0;
1049         }
1050
1051         /* Allocate memory for storing MAC addresses */
1052         eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
1053         if (eth_dev->data->mac_addrs == NULL) {
1054                 PMD_INIT_LOG(ERR,
1055                         "Failed to allocate %d bytes needed to store MAC addresses",
1056                         VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
1057                 return -ENOMEM;
1058         }
1059
1060         pci_dev = eth_dev->pci_dev;
1061
1062         ret = vtpci_init(pci_dev, hw, &dev_flags);
1063         if (ret)
1064                 return ret;
1065
1066         /* Reset the device although not necessary at startup */
1067         vtpci_reset(hw);
1068
1069         /* Tell the host we've noticed this device. */
1070         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1071
1072         /* Tell the host we've known how to drive the device. */
1073         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1074         if (virtio_negotiate_features(hw) < 0)
1075                 return -1;
1076
1077         /* If host does not support status then disable LSC */
1078         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1079                 dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
1080
1081         rte_eth_copy_pci_info(eth_dev, pci_dev);
1082         eth_dev->data->dev_flags = dev_flags;
1083
1084         rx_func_get(eth_dev);
1085
1086         /* Setting up rx_header size for the device */
1087         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
1088             vtpci_with_feature(hw, VIRTIO_F_VERSION_1))
1089                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1090         else
1091                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1092
1093         /* Copy the permanent MAC address to: virtio_hw */
1094         virtio_get_hwaddr(hw);
1095         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1096                         &eth_dev->data->mac_addrs[0]);
1097         PMD_INIT_LOG(DEBUG,
1098                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1099                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1100                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1101
1102         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1103                 config = &local_config;
1104
1105                 vtpci_read_dev_config(hw,
1106                         offsetof(struct virtio_net_config, mac),
1107                         &config->mac, sizeof(config->mac));
1108
1109                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1110                         vtpci_read_dev_config(hw,
1111                                 offsetof(struct virtio_net_config, status),
1112                                 &config->status, sizeof(config->status));
1113                 } else {
1114                         PMD_INIT_LOG(DEBUG,
1115                                      "VIRTIO_NET_F_STATUS is not supported");
1116                         config->status = 0;
1117                 }
1118
1119                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1120                         vtpci_read_dev_config(hw,
1121                                 offsetof(struct virtio_net_config, max_virtqueue_pairs),
1122                                 &config->max_virtqueue_pairs,
1123                                 sizeof(config->max_virtqueue_pairs));
1124                 } else {
1125                         PMD_INIT_LOG(DEBUG,
1126                                      "VIRTIO_NET_F_MQ is not supported");
1127                         config->max_virtqueue_pairs = 1;
1128                 }
1129
1130                 hw->max_rx_queues =
1131                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1132                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1133                 hw->max_tx_queues =
1134                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1135                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1136
1137                 virtio_dev_cq_queue_setup(eth_dev,
1138                                         config->max_virtqueue_pairs * 2,
1139                                         SOCKET_ID_ANY);
1140
1141                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1142                                 config->max_virtqueue_pairs);
1143                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1144                 PMD_INIT_LOG(DEBUG,
1145                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1146                                 config->mac[0], config->mac[1],
1147                                 config->mac[2], config->mac[3],
1148                                 config->mac[4], config->mac[5]);
1149         } else {
1150                 hw->max_rx_queues = 1;
1151                 hw->max_tx_queues = 1;
1152         }
1153
1154         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1155                         hw->max_rx_queues, hw->max_tx_queues);
1156         PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1157                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1158                         pci_dev->id.device_id);
1159
1160         /* Setup interrupt callback  */
1161         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1162                 rte_intr_callback_register(&pci_dev->intr_handle,
1163                                    virtio_interrupt_handler, eth_dev);
1164
1165         virtio_dev_cq_start(eth_dev);
1166
1167         return 0;
1168 }
1169
1170 static int
1171 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1172 {
1173         struct rte_pci_device *pci_dev;
1174         struct virtio_hw *hw = eth_dev->data->dev_private;
1175
1176         PMD_INIT_FUNC_TRACE();
1177
1178         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1179                 return -EPERM;
1180
1181         /* Close it anyway since there's no way to know if closed */
1182         virtio_dev_close(eth_dev);
1183
1184         pci_dev = eth_dev->pci_dev;
1185
1186         eth_dev->dev_ops = NULL;
1187         eth_dev->tx_pkt_burst = NULL;
1188         eth_dev->rx_pkt_burst = NULL;
1189
1190         virtio_dev_queue_release(hw->cvq);
1191
1192         rte_free(eth_dev->data->mac_addrs);
1193         eth_dev->data->mac_addrs = NULL;
1194
1195         /* reset interrupt callback  */
1196         if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1197                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1198                                                 virtio_interrupt_handler,
1199                                                 eth_dev);
1200         rte_eal_pci_unmap_device(pci_dev);
1201
1202         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1203
1204         return 0;
1205 }
1206
1207 static struct eth_driver rte_virtio_pmd = {
1208         .pci_drv = {
1209                 .name = "rte_virtio_pmd",
1210                 .id_table = pci_id_virtio_map,
1211                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1212         },
1213         .eth_dev_init = eth_virtio_dev_init,
1214         .eth_dev_uninit = eth_virtio_dev_uninit,
1215         .dev_private_size = sizeof(struct virtio_hw),
1216 };
1217
1218 /*
1219  * Driver initialization routine.
1220  * Invoked once at EAL init time.
1221  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1222  * Returns 0 on success.
1223  */
1224 static int
1225 rte_virtio_pmd_init(const char *name __rte_unused,
1226                     const char *param __rte_unused)
1227 {
1228         if (rte_eal_iopl_init() != 0) {
1229                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1230                 return -1;
1231         }
1232
1233         rte_eth_driver_register(&rte_virtio_pmd);
1234         return 0;
1235 }
1236
1237 /*
1238  * Configure virtio device
1239  * It returns 0 on success.
1240  */
1241 static int
1242 virtio_dev_configure(struct rte_eth_dev *dev)
1243 {
1244         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1245         struct virtio_hw *hw = dev->data->dev_private;
1246
1247         PMD_INIT_LOG(DEBUG, "configure");
1248
1249         if (rxmode->hw_ip_checksum) {
1250                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1251                 return -EINVAL;
1252         }
1253
1254         hw->vlan_strip = rxmode->hw_vlan_strip;
1255
1256         if (rxmode->hw_vlan_filter
1257             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1258                 PMD_DRV_LOG(NOTICE,
1259                             "vlan filtering not available on this host");
1260                 return -ENOTSUP;
1261         }
1262
1263         if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1264                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1265                         PMD_DRV_LOG(ERR, "failed to set config vector");
1266                         return -EBUSY;
1267                 }
1268
1269         return 0;
1270 }
1271
1272
1273 static int
1274 virtio_dev_start(struct rte_eth_dev *dev)
1275 {
1276         uint16_t nb_queues, i;
1277         struct virtio_hw *hw = dev->data->dev_private;
1278
1279         /* check if lsc interrupt feature is enabled */
1280         if (dev->data->dev_conf.intr_conf.lsc) {
1281                 if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
1282                         PMD_DRV_LOG(ERR, "link status not supported by host");
1283                         return -ENOTSUP;
1284                 }
1285
1286                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1287                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1288                         return -EIO;
1289                 }
1290         }
1291
1292         /* Initialize Link state */
1293         virtio_dev_link_update(dev, 0);
1294
1295         /* On restart after stop do not touch queues */
1296         if (hw->started)
1297                 return 0;
1298
1299         /* Do final configuration before rx/tx engine starts */
1300         virtio_dev_rxtx_start(dev);
1301         vtpci_reinit_complete(hw);
1302
1303         hw->started = 1;
1304
1305         /*Notify the backend
1306          *Otherwise the tap backend might already stop its queue due to fullness.
1307          *vhost backend will have no chance to be waked up
1308          */
1309         nb_queues = dev->data->nb_rx_queues;
1310         if (nb_queues > 1) {
1311                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1312                         return -EINVAL;
1313         }
1314
1315         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1316
1317         for (i = 0; i < nb_queues; i++)
1318                 virtqueue_notify(dev->data->rx_queues[i]);
1319
1320         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1321
1322         for (i = 0; i < dev->data->nb_rx_queues; i++)
1323                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1324
1325         for (i = 0; i < dev->data->nb_tx_queues; i++)
1326                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1327
1328         return 0;
1329 }
1330
1331 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1332 {
1333         struct rte_mbuf *buf;
1334         int i, mbuf_num = 0;
1335
1336         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1337                 PMD_INIT_LOG(DEBUG,
1338                              "Before freeing rxq[%d] used and unused buf", i);
1339                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1340
1341                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p",
1342                                 i, dev->data->rx_queues[i]);
1343                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1344                                         dev->data->rx_queues[i])) != NULL) {
1345                         rte_pktmbuf_free(buf);
1346                         mbuf_num++;
1347                 }
1348
1349                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1350                 PMD_INIT_LOG(DEBUG,
1351                              "After freeing rxq[%d] used and unused buf", i);
1352                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1353         }
1354
1355         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1356                 PMD_INIT_LOG(DEBUG,
1357                              "Before freeing txq[%d] used and unused bufs",
1358                              i);
1359                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1360
1361                 mbuf_num = 0;
1362                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1363                                         dev->data->tx_queues[i])) != NULL) {
1364                         rte_pktmbuf_free(buf);
1365
1366                         mbuf_num++;
1367                 }
1368
1369                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1370                 PMD_INIT_LOG(DEBUG,
1371                              "After freeing txq[%d] used and unused buf", i);
1372                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1373         }
1374 }
1375
1376 /*
1377  * Stop device: disable interrupt and mark link down
1378  */
1379 static void
1380 virtio_dev_stop(struct rte_eth_dev *dev)
1381 {
1382         struct rte_eth_link link;
1383         struct virtio_hw *hw = dev->data->dev_private;
1384
1385         PMD_INIT_LOG(DEBUG, "stop");
1386
1387         hw->started = 0;
1388
1389         if (dev->data->dev_conf.intr_conf.lsc)
1390                 rte_intr_disable(&dev->pci_dev->intr_handle);
1391
1392         memset(&link, 0, sizeof(link));
1393         virtio_dev_atomic_write_link_status(dev, &link);
1394 }
1395
1396 static int
1397 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1398 {
1399         struct rte_eth_link link, old;
1400         uint16_t status;
1401         struct virtio_hw *hw = dev->data->dev_private;
1402         memset(&link, 0, sizeof(link));
1403         virtio_dev_atomic_read_link_status(dev, &link);
1404         old = link;
1405         link.link_duplex = ETH_LINK_FULL_DUPLEX;
1406         link.link_speed  = SPEED_10G;
1407
1408         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1409                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1410                 vtpci_read_dev_config(hw,
1411                                 offsetof(struct virtio_net_config, status),
1412                                 &status, sizeof(status));
1413                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1414                         link.link_status = ETH_LINK_DOWN;
1415                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1416                                      dev->data->port_id);
1417                 } else {
1418                         link.link_status = ETH_LINK_UP;
1419                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1420                                      dev->data->port_id);
1421                 }
1422         } else {
1423                 link.link_status = ETH_LINK_UP;
1424         }
1425         virtio_dev_atomic_write_link_status(dev, &link);
1426
1427         return (old.link_status == link.link_status) ? -1 : 0;
1428 }
1429
1430 static void
1431 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1432 {
1433         struct virtio_hw *hw = dev->data->dev_private;
1434
1435         dev_info->driver_name = dev->driver->pci_drv.name;
1436         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1437         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1438         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1439         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1440         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1441         dev_info->default_txconf = (struct rte_eth_txconf) {
1442                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1443         };
1444 }
1445
1446 /*
1447  * It enables testpmd to collect per queue stats.
1448  */
1449 static int
1450 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1451 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1452 __rte_unused uint8_t is_rx)
1453 {
1454         return 0;
1455 }
1456
1457 static struct rte_driver rte_virtio_driver = {
1458         .type = PMD_PDEV,
1459         .init = rte_virtio_pmd_init,
1460 };
1461
1462 PMD_REGISTER_DRIVER(rte_virtio_driver);