lib/librte_pmd_virtio/virtio_ethdev.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 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 #ifdef RTE_EXEC_ENV_LINUXAPP
  40 #include <dirent.h>
  41 #include <fcntl.h>
  42 #endif
  43
  44 #include <rte_ethdev.h>
  45 #include <rte_memcpy.h>
  46 #include <rte_string_fns.h>
  47 #include <rte_memzone.h>
  48 #include <rte_malloc.h>
  49 #include <rte_atomic.h>
  50 #include <rte_branch_prediction.h>
  51 #include <rte_pci.h>
  52 #include <rte_ether.h>
  53 #include <rte_common.h>
  54
  55 #include <rte_memory.h>
  56 #include <rte_eal.h>
  57 #include <rte_dev.h>
  58
  59 #include "virtio_ethdev.h"
  60 #include "virtio_pci.h"
  61 #include "virtio_logs.h"
  62 #include "virtqueue.h"
  63
  64
  65 static int eth_virtio_dev_init(struct eth_driver *eth_drv,
  66                 struct rte_eth_dev *eth_dev);
  67 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  68 static int  virtio_dev_start(struct rte_eth_dev *dev);
  69 static void virtio_dev_stop(struct rte_eth_dev *dev);
  70 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  71 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  72 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  73 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  74 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  75                                 struct rte_eth_dev_info *dev_info);
  76 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  77         __rte_unused int wait_to_complete);
  78
  79 static void virtio_set_hwaddr(struct virtio_hw *hw);
  80 static void virtio_get_hwaddr(struct virtio_hw *hw);
  81
  82 static void virtio_dev_rx_queue_release(__rte_unused void *rxq);
  83 static void virtio_dev_tx_queue_release(__rte_unused void *txq);
  84
  85 static void virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats);
  86 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  87 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  88 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  89                                 uint16_t vlan_id, int on);
  90 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  91                                 struct ether_addr *mac_addr,
  92                                 uint32_t index, uint32_t vmdq __rte_unused);
  93 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  94 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  95                                 struct ether_addr *mac_addr);
  96
  97 static int virtio_dev_queue_stats_mapping_set(
  98         __rte_unused struct rte_eth_dev *eth_dev,
  99         __rte_unused uint16_t queue_id,
 100         __rte_unused uint8_t stat_idx,
 101         __rte_unused uint8_t is_rx);
 102
 103 /*
 104  * The set of PCI devices this driver supports
 105  */
 106 static struct rte_pci_id pci_id_virtio_map[] = {
 107
 108 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
 109 #include "rte_pci_dev_ids.h"
 110
 111 { .vendor_id = 0, /* sentinel */ },
 112 };
 113
 114 static int
 115 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
 116                 int *dlen, int pkt_num)
 117 {
 118         uint32_t head = vq->vq_desc_head_idx, i;
 119         int k, sum = 0;
 120         virtio_net_ctrl_ack status = ~0;
 121         struct virtio_pmd_ctrl result;
 122
 123         ctrl->status = status;
 124
 125         if (!vq->hw->cvq) {
 126                 PMD_INIT_LOG(ERR,
 127                              "%s(): Control queue is not supported.",
 128                              __func__);
 129                 return -1;
 130         }
 131
 132         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 133                 "vq->hw->cvq = %p vq = %p",
 134                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 135
 136         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 137                 return -1;
 138
 139         memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
 140                 sizeof(struct virtio_pmd_ctrl));
 141
 142         /*
 143          * Format is enforced in qemu code:
 144          * One TX packet for header;
 145          * At least one TX packet per argument;
 146          * One RX packet for ACK.
 147          */
 148         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 149         vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
 150         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 151         vq->vq_free_cnt--;
 152         i = vq->vq_ring.desc[head].next;
 153
 154         for (k = 0; k < pkt_num; k++) {
 155                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 156                 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 157                         + sizeof(struct virtio_net_ctrl_hdr)
 158                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 159                 vq->vq_ring.desc[i].len = dlen[k];
 160                 sum += dlen[k];
 161                 vq->vq_free_cnt--;
 162                 i = vq->vq_ring.desc[i].next;
 163         }
 164
 165         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 166         vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 167                         + sizeof(struct virtio_net_ctrl_hdr);
 168         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 169         vq->vq_free_cnt--;
 170
 171         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 172
 173         vq_update_avail_ring(vq, head);
 174         vq_update_avail_idx(vq);
 175
 176         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 177
 178         virtqueue_notify(vq);
 179
 180         rte_rmb();
 181         while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
 182                 rte_rmb();
 183                 usleep(100);
 184         }
 185
 186         while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
 187                 uint32_t idx, desc_idx, used_idx;
 188                 struct vring_used_elem *uep;
 189
 190                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 191                                 & (vq->vq_nentries - 1));
 192                 uep = &vq->vq_ring.used->ring[used_idx];
 193                 idx = (uint32_t) uep->id;
 194                 desc_idx = idx;
 195
 196                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 197                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 198                         vq->vq_free_cnt++;
 199                 }
 200
 201                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 202                 vq->vq_desc_head_idx = idx;
 203
 204                 vq->vq_used_cons_idx++;
 205                 vq->vq_free_cnt++;
 206         }
 207
 208         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 209                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 210
 211         memcpy(&result, vq->virtio_net_hdr_mz->addr,
 212                         sizeof(struct virtio_pmd_ctrl));
 213
 214         return result.status;
 215 }
 216
 217 static int
 218 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 219 {
 220         struct virtio_hw *hw = dev->data->dev_private;
 221         struct virtio_pmd_ctrl ctrl;
 222         int dlen[1];
 223         int ret;
 224
 225         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 226         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 227         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 228
 229         dlen[0] = sizeof(uint16_t);
 230
 231         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 232
 233         if (ret) {
 234                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 235                           "failed, this is too late now...");
 236                 return -EINVAL;
 237         }
 238
 239         return 0;
 240 }
 241
 242 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 243                         int queue_type,
 244                         uint16_t queue_idx,
 245                         uint8_t  vtpci_queue_idx,
 246                         uint16_t nb_desc,
 247                         unsigned int socket_id,
 248                         struct virtqueue **pvq)
 249 {
 250         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 251         const struct rte_memzone *mz;
 252         uint16_t vq_size;
 253         int size;
 254         struct virtio_hw *hw = dev->data->dev_private;
 255         struct virtqueue  *vq = NULL;
 256
 257         /* Write the virtqueue index to the Queue Select Field */
 258         VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
 259         PMD_INIT_LOG(DEBUG, "selecting queue: %d", vtpci_queue_idx);
 260
 261         /*
 262          * Read the virtqueue size from the Queue Size field
 263          * Always power of 2 and if 0 virtqueue does not exist
 264          */
 265         vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
 266         PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d", vq_size, nb_desc);
 267         if (nb_desc == 0)
 268                 nb_desc = vq_size;
 269         if (vq_size == 0) {
 270                 PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
 271                 return -EINVAL;
 272         } else if (!rte_is_power_of_2(vq_size)) {
 273                 PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
 274                 return -EINVAL;
 275         } else if (nb_desc != vq_size) {
 276                 PMD_INIT_LOG(ERR, "Warning: nb_desc(%d) is not equal to vq size (%d), fall to vq size",
 277                         nb_desc, vq_size);
 278                 nb_desc = vq_size;
 279         }
 280
 281         if (queue_type == VTNET_RQ) {
 282                 snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
 283                         dev->data->port_id, queue_idx);
 284                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 285                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 286         } else if (queue_type == VTNET_TQ) {
 287                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
 288                         dev->data->port_id, queue_idx);
 289                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 290                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 291         } else if (queue_type == VTNET_CQ) {
 292                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
 293                         dev->data->port_id);
 294                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 295                         vq_size * sizeof(struct vq_desc_extra),
 296                         RTE_CACHE_LINE_SIZE);
 297         }
 298         if (vq == NULL) {
 299                 PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__);
 300                 return (-ENOMEM);
 301         }
 302
 303         vq->hw = hw;
 304         vq->port_id = dev->data->port_id;
 305         vq->queue_id = queue_idx;
 306         vq->vq_queue_index = vtpci_queue_idx;
 307         vq->vq_nentries = vq_size;
 308         vq->vq_free_cnt = vq_size;
 309
 310         /*
 311          * Reserve a memzone for vring elements
 312          */
 313         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 314         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 315         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
 316
 317         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 318                 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
 319         if (mz == NULL) {
 320                 rte_free(vq);
 321                 return -ENOMEM;
 322         }
 323
 324         /*
 325          * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
 326          * and only accepts 32 bit page frame number.
 327          * Check if the allocated physical memory exceeds 16TB.
 328          */
 329         if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
 330                 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
 331                 rte_free(vq);
 332                 return -ENOMEM;
 333         }
 334
 335         memset(mz->addr, 0, sizeof(mz->len));
 336         vq->mz = mz;
 337         vq->vq_ring_mem = mz->phys_addr;
 338         vq->vq_ring_virt_mem = mz->addr;
 339         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64, (uint64_t)mz->phys_addr);
 340         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)mz->addr);
 341         vq->virtio_net_hdr_mz  = NULL;
 342         vq->virtio_net_hdr_mem = 0;
 343
 344         if (queue_type == VTNET_TQ) {
 345                 /*
 346                  * For each xmit packet, allocate a virtio_net_hdr
 347                  */
 348                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
 349                         dev->data->port_id, queue_idx);
 350                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 351                         vq_size * hw->vtnet_hdr_size,
 352                         socket_id, 0, RTE_CACHE_LINE_SIZE);
 353                 if (vq->virtio_net_hdr_mz == NULL) {
 354                         rte_free(vq);
 355                         return -ENOMEM;
 356                 }
 357                 vq->virtio_net_hdr_mem =
 358                         vq->virtio_net_hdr_mz->phys_addr;
 359                 memset(vq->virtio_net_hdr_mz->addr, 0,
 360                         vq_size * hw->vtnet_hdr_size);
 361         } else if (queue_type == VTNET_CQ) {
 362                 /* Allocate a page for control vq command, data and status */
 363                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
 364                         dev->data->port_id);
 365                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 366                         PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
 367                 if (vq->virtio_net_hdr_mz == NULL) {
 368                         rte_free(vq);
 369                         return -ENOMEM;
 370                 }
 371                 vq->virtio_net_hdr_mem =
 372                         vq->virtio_net_hdr_mz->phys_addr;
 373                 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 374         }
 375
 376         /*
 377          * Set guest physical address of the virtqueue
 378          * in VIRTIO_PCI_QUEUE_PFN config register of device
 379          */
 380         VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
 381                         mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
 382         *pvq = vq;
 383         return 0;
 384 }
 385
 386 static int
 387 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 388                 uint32_t socket_id)
 389 {
 390         struct virtqueue *vq;
 391         uint16_t nb_desc = 0;
 392         int ret;
 393         struct virtio_hw *hw = dev->data->dev_private;
 394
 395         PMD_INIT_FUNC_TRACE();
 396         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 397                         vtpci_queue_idx, nb_desc, socket_id, &vq);
 398
 399         if (ret < 0) {
 400                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 401                 return ret;
 402         }
 403
 404         hw->cvq = vq;
 405         return 0;
 406 }
 407
 408 static void
 409 virtio_dev_close(struct rte_eth_dev *dev)
 410 {
 411         struct virtio_hw *hw = dev->data->dev_private;
 412         struct rte_pci_device *pci_dev = dev->pci_dev;
 413
 414         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 415
 416         /* reset the NIC */
 417         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
 418                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 419         vtpci_reset(hw);
 420         hw->started = 0;
 421         virtio_dev_free_mbufs(dev);
 422 }
 423
 424 static void
 425 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 426 {
 427         struct virtio_hw *hw = dev->data->dev_private;
 428         struct virtio_pmd_ctrl ctrl;
 429         int dlen[1];
 430         int ret;
 431
 432         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 433         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 434         ctrl.data[0] = 1;
 435         dlen[0] = 1;
 436
 437         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 438
 439         if (ret)
 440                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 441 }
 442
 443 static void
 444 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 445 {
 446         struct virtio_hw *hw = dev->data->dev_private;
 447         struct virtio_pmd_ctrl ctrl;
 448         int dlen[1];
 449         int ret;
 450
 451         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 452         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 453         ctrl.data[0] = 0;
 454         dlen[0] = 1;
 455
 456         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 457
 458         if (ret)
 459                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 460 }
 461
 462 static void
 463 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 464 {
 465         struct virtio_hw *hw = dev->data->dev_private;
 466         struct virtio_pmd_ctrl ctrl;
 467         int dlen[1];
 468         int ret;
 469
 470         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 471         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 472         ctrl.data[0] = 1;
 473         dlen[0] = 1;
 474
 475         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 476
 477         if (ret)
 478                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 479 }
 480
 481 static void
 482 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 483 {
 484         struct virtio_hw *hw = dev->data->dev_private;
 485         struct virtio_pmd_ctrl ctrl;
 486         int dlen[1];
 487         int ret;
 488
 489         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 490         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 491         ctrl.data[0] = 0;
 492         dlen[0] = 1;
 493
 494         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 495
 496         if (ret)
 497                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 498 }
 499
 500 /*
 501  * dev_ops for virtio, bare necessities for basic operation
 502  */
 503 static struct eth_dev_ops virtio_eth_dev_ops = {
 504         .dev_configure           = virtio_dev_configure,
 505         .dev_start               = virtio_dev_start,
 506         .dev_stop                = virtio_dev_stop,
 507         .dev_close               = virtio_dev_close,
 508         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 509         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 510         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 511         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 512
 513         .dev_infos_get           = virtio_dev_info_get,
 514         .stats_get               = virtio_dev_stats_get,
 515         .stats_reset             = virtio_dev_stats_reset,
 516         .link_update             = virtio_dev_link_update,
 517         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 518         /* meaningfull only to multiple queue */
 519         .rx_queue_release        = virtio_dev_rx_queue_release,
 520         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 521         /* meaningfull only to multiple queue */
 522         .tx_queue_release        = virtio_dev_tx_queue_release,
 523         /* collect stats per queue */
 524         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 525         .vlan_filter_set         = virtio_vlan_filter_set,
 526         .mac_addr_add            = virtio_mac_addr_add,
 527         .mac_addr_remove         = virtio_mac_addr_remove,
 528         .mac_addr_set            = virtio_mac_addr_set,
 529 };
 530
 531 static inline int
 532 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 533                                 struct rte_eth_link *link)
 534 {
 535         struct rte_eth_link *dst = link;
 536         struct rte_eth_link *src = &(dev->data->dev_link);
 537
 538         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 539                         *(uint64_t *)src) == 0)
 540                 return -1;
 541
 542         return 0;
 543 }
 544
 545 /**
 546  * Atomically writes the link status information into global
 547  * structure rte_eth_dev.
 548  *
 549  * @param dev
 550  *   - Pointer to the structure rte_eth_dev to read from.
 551  *   - Pointer to the buffer to be saved with the link status.
 552  *
 553  * @return
 554  *   - On success, zero.
 555  *   - On failure, negative value.
 556  */
 557 static inline int
 558 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 559                 struct rte_eth_link *link)
 560 {
 561         struct rte_eth_link *dst = &(dev->data->dev_link);
 562         struct rte_eth_link *src = link;
 563
 564         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 565                                         *(uint64_t *)src) == 0)
 566                 return -1;
 567
 568         return 0;
 569 }
 570
 571 static void
 572 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 573 {
 574         unsigned i;
 575
 576         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 577                 const struct virtqueue *txvq = dev->data->tx_queues[i];
 578                 if (txvq == NULL)
 579                         continue;
 580
 581                 stats->opackets += txvq->packets;
 582                 stats->obytes += txvq->bytes;
 583                 stats->oerrors += txvq->errors;
 584
 585                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 586                         stats->q_opackets[i] = txvq->packets;
 587                         stats->q_obytes[i] = txvq->bytes;
 588                 }
 589         }
 590
 591         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 592                 const struct virtqueue *rxvq = dev->data->rx_queues[i];
 593                 if (rxvq == NULL)
 594                         continue;
 595
 596                 stats->ipackets += rxvq->packets;
 597                 stats->ibytes += rxvq->bytes;
 598                 stats->ierrors += rxvq->errors;
 599
 600                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 601                         stats->q_ipackets[i] = rxvq->packets;
 602                         stats->q_ibytes[i] = rxvq->bytes;
 603                 }
 604         }
 605
 606         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 607 }
 608
 609 static void
 610 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 611 {
 612         unsigned int i;
 613
 614         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 615                 struct virtqueue *txvq = dev->data->tx_queues[i];
 616                 if (txvq == NULL)
 617                         continue;
 618
 619                 txvq->packets = 0;
 620                 txvq->bytes = 0;
 621                 txvq->errors = 0;
 622         }
 623
 624         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 625                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 626                 if (rxvq == NULL)
 627                         continue;
 628
 629                 rxvq->packets = 0;
 630                 rxvq->bytes = 0;
 631                 rxvq->errors = 0;
 632         }
 633
 634         dev->data->rx_mbuf_alloc_failed = 0;
 635 }
 636
 637 static void
 638 virtio_set_hwaddr(struct virtio_hw *hw)
 639 {
 640         vtpci_write_dev_config(hw,
 641                         offsetof(struct virtio_net_config, mac),
 642                         &hw->mac_addr, ETHER_ADDR_LEN);
 643 }
 644
 645 static void
 646 virtio_get_hwaddr(struct virtio_hw *hw)
 647 {
 648         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 649                 vtpci_read_dev_config(hw,
 650                         offsetof(struct virtio_net_config, mac),
 651                         &hw->mac_addr, ETHER_ADDR_LEN);
 652         } else {
 653                 eth_random_addr(&hw->mac_addr[0]);
 654                 virtio_set_hwaddr(hw);
 655         }
 656 }
 657
 658 static int
 659 virtio_mac_table_set(struct virtio_hw *hw,
 660                      const struct virtio_net_ctrl_mac *uc,
 661                      const struct virtio_net_ctrl_mac *mc)
 662 {
 663         struct virtio_pmd_ctrl ctrl;
 664         int err, len[2];
 665
 666         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 667         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 668
 669         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 670         memcpy(ctrl.data, uc, len[0]);
 671
 672         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 673         memcpy(ctrl.data + len[0], mc, len[1]);
 674
 675         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 676         if (err != 0)
 677                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 678
 679         return err;
 680 }
 681
 682 static void
 683 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 684                     uint32_t index, uint32_t vmdq __rte_unused)
 685 {
 686         struct virtio_hw *hw = dev->data->dev_private;
 687         const struct ether_addr *addrs = dev->data->mac_addrs;
 688         unsigned int i;
 689         struct virtio_net_ctrl_mac *uc, *mc;
 690
 691         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 692                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 693                 return;
 694         }
 695
 696         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 697         uc->entries = 0;
 698         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 699         mc->entries = 0;
 700
 701         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 702                 const struct ether_addr *addr
 703                         = (i == index) ? mac_addr : addrs + i;
 704                 struct virtio_net_ctrl_mac *tbl
 705                         = is_multicast_ether_addr(addr) ? mc : uc;
 706
 707                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 708         }
 709
 710         virtio_mac_table_set(hw, uc, mc);
 711 }
 712
 713 static void
 714 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 715 {
 716         struct virtio_hw *hw = dev->data->dev_private;
 717         struct ether_addr *addrs = dev->data->mac_addrs;
 718         struct virtio_net_ctrl_mac *uc, *mc;
 719         unsigned int i;
 720
 721         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 722                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 723                 return;
 724         }
 725
 726         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 727         uc->entries = 0;
 728         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 729         mc->entries = 0;
 730
 731         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 732                 struct virtio_net_ctrl_mac *tbl;
 733
 734                 if (i == index || is_zero_ether_addr(addrs + i))
 735                         continue;
 736
 737                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
 738                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
 739         }
 740
 741         virtio_mac_table_set(hw, uc, mc);
 742 }
 743
 744 static void
 745 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
 746 {
 747         struct virtio_hw *hw = dev->data->dev_private;
 748
 749         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
 750
 751         /* Use atomic update if available */
 752         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 753                 struct virtio_pmd_ctrl ctrl;
 754                 int len = ETHER_ADDR_LEN;
 755
 756                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 757                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
 758
 759                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
 760                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
 761         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
 762                 virtio_set_hwaddr(hw);
 763 }
 764
 765 static int
 766 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 767 {
 768         struct virtio_hw *hw = dev->data->dev_private;
 769         struct virtio_pmd_ctrl ctrl;
 770         int len;
 771
 772         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
 773                 return -ENOTSUP;
 774
 775         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
 776         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
 777         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
 778         len = sizeof(vlan_id);
 779
 780         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
 781 }
 782
 783 static void
 784 virtio_negotiate_features(struct virtio_hw *hw)
 785 {
 786         uint32_t host_features, mask;
 787
 788         /* checksum offload not implemented */
 789         mask = VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM;
 790
 791         /* TSO and LRO are only available when their corresponding
 792          * checksum offload feature is also negotiated.
 793          */
 794         mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN;
 795         mask |= VIRTIO_NET_F_GUEST_TSO4 | VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN;
 796         mask |= VTNET_LRO_FEATURES;
 797
 798         /* not negotiating INDIRECT descriptor table support */
 799         mask |= VIRTIO_RING_F_INDIRECT_DESC;
 800
 801         /* Prepare guest_features: feature that driver wants to support */
 802         hw->guest_features = VTNET_FEATURES & ~mask;
 803         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
 804                 hw->guest_features);
 805
 806         /* Read device(host) feature bits */
 807         host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
 808         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
 809                 host_features);
 810
 811         /*
 812          * Negotiate features: Subset of device feature bits are written back
 813          * guest feature bits.
 814          */
 815         hw->guest_features = vtpci_negotiate_features(hw, host_features);
 816         PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
 817                 hw->guest_features);
 818 }
 819
 820 #ifdef RTE_EXEC_ENV_LINUXAPP
 821 static int
 822 parse_sysfs_value(const char *filename, unsigned long *val)
 823 {
 824         FILE *f;
 825         char buf[BUFSIZ];
 826         char *end = NULL;
 827
 828         f = fopen(filename, "r");
 829         if (f == NULL) {
 830                 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
 831                              __func__, filename);
 832                 return -1;
 833         }
 834
 835         if (fgets(buf, sizeof(buf), f) == NULL) {
 836                 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
 837                              __func__, filename);
 838                 fclose(f);
 839                 return -1;
 840         }
 841         *val = strtoul(buf, &end, 0);
 842         if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
 843                 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
 844                              __func__, filename);
 845                 fclose(f);
 846                 return -1;
 847         }
 848         fclose(f);
 849         return 0;
 850 }
 851
 852 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen,
 853                         unsigned int *uio_num)
 854 {
 855         struct dirent *e;
 856         DIR *dir;
 857         char dirname[PATH_MAX];
 858
 859         /* depending on kernel version, uio can be located in uio/uioX
 860          * or uio:uioX */
 861         snprintf(dirname, sizeof(dirname),
 862                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
 863                      loc->domain, loc->bus, loc->devid, loc->function);
 864         dir = opendir(dirname);
 865         if (dir == NULL) {
 866                 /* retry with the parent directory */
 867                 snprintf(dirname, sizeof(dirname),
 868                              SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
 869                              loc->domain, loc->bus, loc->devid, loc->function);
 870                 dir = opendir(dirname);
 871
 872                 if (dir == NULL) {
 873                         PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
 874                         return -1;
 875                 }
 876         }
 877
 878         /* take the first file starting with "uio" */
 879         while ((e = readdir(dir)) != NULL) {
 880                 /* format could be uio%d ...*/
 881                 int shortprefix_len = sizeof("uio") - 1;
 882                 /* ... or uio:uio%d */
 883                 int longprefix_len = sizeof("uio:uio") - 1;
 884                 char *endptr;
 885
 886                 if (strncmp(e->d_name, "uio", 3) != 0)
 887                         continue;
 888
 889                 /* first try uio%d */
 890                 errno = 0;
 891                 *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
 892                 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
 893                         snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num);
 894                         break;
 895                 }
 896
 897                 /* then try uio:uio%d */
 898                 errno = 0;
 899                 *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
 900                 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
 901                         snprintf(buf, buflen, "%s/uio:uio%u", dirname,
 902                                      *uio_num);
 903                         break;
 904                 }
 905         }
 906         closedir(dir);
 907
 908         /* No uio resource found */
 909         if (e == NULL) {
 910                 PMD_INIT_LOG(ERR, "Could not find uio resource");
 911                 return -1;
 912         }
 913
 914         return 0;
 915 }
 916
 917 static int
 918 virtio_has_msix(const struct rte_pci_addr *loc)
 919 {
 920         DIR *d;
 921         char dirname[PATH_MAX];
 922
 923         snprintf(dirname, sizeof(dirname),
 924                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
 925                      loc->domain, loc->bus, loc->devid, loc->function);
 926
 927         d = opendir(dirname);
 928         if (d)
 929                 closedir(d);
 930
 931         return (d != NULL);
 932 }
 933
 934 /* Extract I/O port numbers from sysfs */
 935 static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
 936 {
 937         char dirname[PATH_MAX];
 938         char filename[PATH_MAX];
 939         unsigned long start, size;
 940         unsigned int uio_num;
 941
 942         if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
 943                 return -1;
 944
 945         /* get portio size */
 946         snprintf(filename, sizeof(filename),
 947                      "%s/portio/port0/size", dirname);
 948         if (parse_sysfs_value(filename, &size) < 0) {
 949                 PMD_INIT_LOG(ERR, "%s(): cannot parse size",
 950                              __func__);
 951                 return -1;
 952         }
 953
 954         /* get portio start */
 955         snprintf(filename, sizeof(filename),
 956                  "%s/portio/port0/start", dirname);
 957         if (parse_sysfs_value(filename, &start) < 0) {
 958                 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
 959                              __func__);
 960                 return -1;
 961         }
 962         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
 963         pci_dev->mem_resource[0].len =  (uint64_t)size;
 964         PMD_INIT_LOG(DEBUG,
 965                      "PCI Port IO found start=0x%lx with size=0x%lx",
 966                      start, size);
 967
 968         /* save fd */
 969         memset(dirname, 0, sizeof(dirname));
 970         snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
 971         pci_dev->intr_handle.fd = open(dirname, O_RDWR);
 972         if (pci_dev->intr_handle.fd < 0) {
 973                 PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
 974                         devname, strerror(errno));
 975                 return -1;
 976         }
 977
 978         pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
 979         pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
 980
 981         return 0;
 982 }
 983
 984 /* Extract port I/O numbers from proc/ioports */
 985 static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
 986 {
 987         uint16_t start, end;
 988         int size;
 989         FILE *fp;
 990         char *line = NULL;
 991         char pci_id[16];
 992         int found = 0;
 993         size_t linesz;
 994
 995         snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
 996                  pci_dev->addr.domain,
 997                  pci_dev->addr.bus,
 998                  pci_dev->addr.devid,
 999                  pci_dev->addr.function);
1000
1001         fp = fopen("/proc/ioports", "r");
1002         if (fp == NULL) {
1003                 PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
1004                 return -1;
1005         }
1006
1007         while (getdelim(&line, &linesz, '\n', fp) > 0) {
1008                 char *ptr = line;
1009                 char *left;
1010                 int n;
1011
1012                 n = strcspn(ptr, ":");
1013                 ptr[n] = 0;
1014                 left = &ptr[n+1];
1015
1016                 while (*left && isspace(*left))
1017                         left++;
1018
1019                 if (!strncmp(left, pci_id, strlen(pci_id))) {
1020                         found = 1;
1021
1022                         while (*ptr && isspace(*ptr))
1023                                 ptr++;
1024
1025                         sscanf(ptr, "%04hx-%04hx", &start, &end);
1026                         size = end - start + 1;
1027
1028                         break;
1029                 }
1030         }
1031
1032         free(line);
1033         fclose(fp);
1034
1035         if (!found)
1036                 return -1;
1037
1038         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
1039         pci_dev->mem_resource[0].len =  (uint64_t)size;
1040         PMD_INIT_LOG(DEBUG,
1041                 "PCI Port IO found start=0x%x with size=0x%x",
1042                 start, size);
1043
1044         /* can't support lsc interrupt without uio */
1045         pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1046
1047         return 0;
1048 }
1049
1050 /* Extract I/O port numbers from sysfs */
1051 static int virtio_resource_init(struct rte_pci_device *pci_dev)
1052 {
1053         if (virtio_resource_init_by_uio(pci_dev) == 0)
1054                 return 0;
1055         else
1056                 return virtio_resource_init_by_ioports(pci_dev);
1057 }
1058
1059 #else
1060 static int
1061 virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
1062 {
1063         /* nic_uio does not enable interrupts, return 0 (false). */
1064         return 0;
1065 }
1066
1067 static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
1068 {
1069         /* no setup required */
1070         return 0;
1071 }
1072 #endif
1073
1074 /*
1075  * Process Virtio Config changed interrupt and call the callback
1076  * if link state changed.
1077  */
1078 static void
1079 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1080                          void *param)
1081 {
1082         struct rte_eth_dev *dev = param;
1083         struct virtio_hw *hw = dev->data->dev_private;
1084         uint8_t isr;
1085
1086         /* Read interrupt status which clears interrupt */
1087         isr = vtpci_isr(hw);
1088         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1089
1090         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1091                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1092
1093         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1094                 if (virtio_dev_link_update(dev, 0) == 0)
1095                         _rte_eth_dev_callback_process(dev,
1096                                                       RTE_ETH_EVENT_INTR_LSC);
1097         }
1098
1099 }
1100
1101 /*
1102  * This function is based on probe() function in virtio_pci.c
1103  * It returns 0 on success.
1104  */
1105 static int
1106 eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
1107                 struct rte_eth_dev *eth_dev)
1108 {
1109         struct virtio_hw *hw = eth_dev->data->dev_private;
1110         struct virtio_net_config *config;
1111         struct virtio_net_config local_config;
1112         uint32_t offset_conf = sizeof(config->mac);
1113         struct rte_pci_device *pci_dev;
1114
1115         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
1116
1117         eth_dev->dev_ops = &virtio_eth_dev_ops;
1118         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1119
1120         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1121                 return 0;
1122
1123         /* Allocate memory for storing MAC addresses */
1124         eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
1125         if (eth_dev->data->mac_addrs == NULL) {
1126                 PMD_INIT_LOG(ERR,
1127                         "Failed to allocate %d bytes needed to store MAC addresses",
1128                         ETHER_ADDR_LEN);
1129                 return -ENOMEM;
1130         }
1131
1132         pci_dev = eth_dev->pci_dev;
1133         if (virtio_resource_init(pci_dev) < 0)
1134                 return -1;
1135
1136         hw->use_msix = virtio_has_msix(&pci_dev->addr);
1137         hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
1138
1139         /* Reset the device although not necessary at startup */
1140         vtpci_reset(hw);
1141
1142         /* Tell the host we've noticed this device. */
1143         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1144
1145         /* Tell the host we've known how to drive the device. */
1146         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1147         virtio_negotiate_features(hw);
1148
1149         /* Setting up rx_header size for the device */
1150         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1151                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1152                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1153         } else {
1154                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1155                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1156         }
1157
1158         /* Copy the permanent MAC address to: virtio_hw */
1159         virtio_get_hwaddr(hw);
1160         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1161                         &eth_dev->data->mac_addrs[0]);
1162         PMD_INIT_LOG(DEBUG,
1163                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1164                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1165                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1166
1167         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1168                 config = &local_config;
1169
1170                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1171                         offset_conf += sizeof(config->status);
1172                 } else {
1173                         PMD_INIT_LOG(DEBUG,
1174                                      "VIRTIO_NET_F_STATUS is not supported");
1175                         config->status = 0;
1176                 }
1177
1178                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1179                         offset_conf += sizeof(config->max_virtqueue_pairs);
1180                 } else {
1181                         PMD_INIT_LOG(DEBUG,
1182                                      "VIRTIO_NET_F_MQ is not supported");
1183                         config->max_virtqueue_pairs = 1;
1184                 }
1185
1186                 vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf);
1187
1188                 hw->max_rx_queues =
1189                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1190                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1191                 hw->max_tx_queues =
1192                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1193                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1194
1195                 virtio_dev_cq_queue_setup(eth_dev,
1196                                         config->max_virtqueue_pairs * 2,
1197                                         SOCKET_ID_ANY);
1198
1199                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1200                                 config->max_virtqueue_pairs);
1201                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1202                 PMD_INIT_LOG(DEBUG,
1203                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1204                                 config->mac[0], config->mac[1],
1205                                 config->mac[2], config->mac[3],
1206                                 config->mac[4], config->mac[5]);
1207         } else {
1208                 hw->max_rx_queues = 1;
1209                 hw->max_tx_queues = 1;
1210         }
1211
1212         eth_dev->data->nb_rx_queues = hw->max_rx_queues;
1213         eth_dev->data->nb_tx_queues = hw->max_tx_queues;
1214
1215         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1216                         hw->max_rx_queues, hw->max_tx_queues);
1217         PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1218                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1219                         pci_dev->id.device_id);
1220
1221         /* Setup interrupt callback  */
1222         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1223                 rte_intr_callback_register(&pci_dev->intr_handle,
1224                                    virtio_interrupt_handler, eth_dev);
1225
1226         virtio_dev_cq_start(eth_dev);
1227
1228         return 0;
1229 }
1230
1231 static struct eth_driver rte_virtio_pmd = {
1232         {
1233                 .name = "rte_virtio_pmd",
1234                 .id_table = pci_id_virtio_map,
1235         },
1236         .eth_dev_init = eth_virtio_dev_init,
1237         .dev_private_size = sizeof(struct virtio_hw),
1238 };
1239
1240 /*
1241  * Driver initialization routine.
1242  * Invoked once at EAL init time.
1243  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1244  * Returns 0 on success.
1245  */
1246 static int
1247 rte_virtio_pmd_init(const char *name __rte_unused,
1248                     const char *param __rte_unused)
1249 {
1250         if (rte_eal_iopl_init() != 0) {
1251                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1252                 return -1;
1253         }
1254
1255         rte_eth_driver_register(&rte_virtio_pmd);
1256         return 0;
1257 }
1258
1259 /*
1260  * Only 1 queue is supported, no queue release related operation
1261  */
1262 static void
1263 virtio_dev_rx_queue_release(__rte_unused void *rxq)
1264 {
1265 }
1266
1267 static void
1268 virtio_dev_tx_queue_release(__rte_unused void *txq)
1269 {
1270 }
1271
1272 /*
1273  * Configure virtio device
1274  * It returns 0 on success.
1275  */
1276 static int
1277 virtio_dev_configure(struct rte_eth_dev *dev)
1278 {
1279         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1280         struct virtio_hw *hw = dev->data->dev_private;
1281         struct rte_pci_device *pci_dev = dev->pci_dev;
1282
1283         PMD_INIT_LOG(DEBUG, "configure");
1284
1285         if (rxmode->hw_ip_checksum) {
1286                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1287                 return (-EINVAL);
1288         }
1289
1290         hw->vlan_strip = rxmode->hw_vlan_strip;
1291
1292         if (rxmode->hw_vlan_filter
1293             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1294                 PMD_DRV_LOG(NOTICE,
1295                             "vlan filtering not available on this host");
1296                 return -ENOTSUP;
1297         }
1298
1299         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1300                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1301                         PMD_DRV_LOG(ERR, "failed to set config vector");
1302                         return -EBUSY;
1303                 }
1304
1305         return 0;
1306 }
1307
1308
1309 static int
1310 virtio_dev_start(struct rte_eth_dev *dev)
1311 {
1312         uint16_t nb_queues, i;
1313         struct virtio_hw *hw = dev->data->dev_private;
1314         struct rte_pci_device *pci_dev = dev->pci_dev;
1315
1316         /* check if lsc interrupt feature is enabled */
1317         if ((dev->data->dev_conf.intr_conf.lsc) &&
1318                 (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
1319                 if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1320                         PMD_DRV_LOG(ERR, "link status not supported by host");
1321                         return -ENOTSUP;
1322                 }
1323
1324                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1325                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1326                         return -EIO;
1327                 }
1328         }
1329
1330         /* Initialize Link state */
1331         virtio_dev_link_update(dev, 0);
1332
1333         /* On restart after stop do not touch queues */
1334         if (hw->started)
1335                 return 0;
1336
1337         /* Do final configuration before rx/tx engine starts */
1338         virtio_dev_rxtx_start(dev);
1339         vtpci_reinit_complete(hw);
1340
1341         hw->started = 1;
1342
1343         /*Notify the backend
1344          *Otherwise the tap backend might already stop its queue due to fullness.
1345          *vhost backend will have no chance to be waked up
1346          */
1347         nb_queues = dev->data->nb_rx_queues;
1348         if (nb_queues > 1) {
1349                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1350                         return -EINVAL;
1351         }
1352
1353         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1354
1355         for (i = 0; i < nb_queues; i++)
1356                 virtqueue_notify(dev->data->rx_queues[i]);
1357
1358         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1359
1360         for (i = 0; i < dev->data->nb_rx_queues; i++)
1361                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1362
1363         for (i = 0; i < dev->data->nb_tx_queues; i++)
1364                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1365
1366         return 0;
1367 }
1368
1369 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1370 {
1371         struct rte_mbuf *buf;
1372         int i, mbuf_num = 0;
1373
1374         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1375                 PMD_INIT_LOG(DEBUG,
1376                              "Before freeing rxq[%d] used and unused buf", i);
1377                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1378
1379                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1380                                         dev->data->rx_queues[i])) != NULL) {
1381                         rte_pktmbuf_free(buf);
1382                         mbuf_num++;
1383                 }
1384
1385                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1386                 PMD_INIT_LOG(DEBUG,
1387                              "After freeing rxq[%d] used and unused buf", i);
1388                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1389         }
1390
1391         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1392                 PMD_INIT_LOG(DEBUG,
1393                              "Before freeing txq[%d] used and unused bufs",
1394                              i);
1395                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1396
1397                 mbuf_num = 0;
1398                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1399                                         dev->data->tx_queues[i])) != NULL) {
1400                         rte_pktmbuf_free(buf);
1401
1402                         mbuf_num++;
1403                 }
1404
1405                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1406                 PMD_INIT_LOG(DEBUG,
1407                              "After freeing txq[%d] used and unused buf", i);
1408                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1409         }
1410 }
1411
1412 /*
1413  * Stop device: disable interrupt and mark link down
1414  */
1415 static void
1416 virtio_dev_stop(struct rte_eth_dev *dev)
1417 {
1418         struct rte_eth_link link;
1419
1420         PMD_INIT_LOG(DEBUG, "stop");
1421
1422         if (dev->data->dev_conf.intr_conf.lsc)
1423                 rte_intr_disable(&dev->pci_dev->intr_handle);
1424
1425         memset(&link, 0, sizeof(link));
1426         virtio_dev_atomic_write_link_status(dev, &link);
1427 }
1428
1429 static int
1430 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1431 {
1432         struct rte_eth_link link, old;
1433         uint16_t status;
1434         struct virtio_hw *hw = dev->data->dev_private;
1435         memset(&link, 0, sizeof(link));
1436         virtio_dev_atomic_read_link_status(dev, &link);
1437         old = link;
1438         link.link_duplex = FULL_DUPLEX;
1439         link.link_speed  = SPEED_10G;
1440
1441         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1442                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1443                 vtpci_read_dev_config(hw,
1444                                 offsetof(struct virtio_net_config, status),
1445                                 &status, sizeof(status));
1446                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1447                         link.link_status = 0;
1448                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1449                                      dev->data->port_id);
1450                 } else {
1451                         link.link_status = 1;
1452                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1453                                      dev->data->port_id);
1454                 }
1455         } else {
1456                 link.link_status = 1;   /* Link up */
1457         }
1458         virtio_dev_atomic_write_link_status(dev, &link);
1459
1460         return (old.link_status == link.link_status) ? -1 : 0;
1461 }
1462
1463 static void
1464 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1465 {
1466         struct virtio_hw *hw = dev->data->dev_private;
1467
1468         dev_info->driver_name = dev->driver->pci_drv.name;
1469         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1470         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1471         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1472         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1473         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1474 }
1475
1476 /*
1477  * It enables testpmd to collect per queue stats.
1478  */
1479 static int
1480 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1481 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1482 __rte_unused uint8_t is_rx)
1483 {
1484         return 0;
1485 }
1486
1487 static struct rte_driver rte_virtio_driver = {
1488         .type = PMD_PDEV,
1489         .init = rte_virtio_pmd_init,
1490 };
1491
1492 PMD_REGISTER_DRIVER(rte_virtio_driver);