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