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 #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 #include <rte_errno.h>
  55
  56 #include <rte_memory.h>
  57 #include <rte_eal.h>
  58 #include <rte_dev.h>
  59
  60 #include "virtio_ethdev.h"
  61 #include "virtio_pci.h"
  62 #include "virtio_logs.h"
  63 #include "virtqueue.h"
  64
  65
  66 static int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
  67 static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
  68 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  69 static int  virtio_dev_start(struct rte_eth_dev *dev);
  70 static void virtio_dev_stop(struct rte_eth_dev *dev);
  71 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  72 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  73 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  74 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  75 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  76                                 struct rte_eth_dev_info *dev_info);
  77 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  78         __rte_unused int wait_to_complete);
  79
  80 static void virtio_set_hwaddr(struct virtio_hw *hw);
  81 static void virtio_get_hwaddr(struct virtio_hw *hw);
  82
  83 static void virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats);
  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 static int
 113 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
 114                 int *dlen, int pkt_num)
 115 {
 116         uint32_t head, i;
 117         int k, sum = 0;
 118         virtio_net_ctrl_ack status = ~0;
 119         struct virtio_pmd_ctrl result;
 120
 121         ctrl->status = status;
 122
 123         if (!(vq && vq->hw->cvq)) {
 124                 PMD_INIT_LOG(ERR,
 125                              "%s(): Control queue is not supported.",
 126                              __func__);
 127                 return -1;
 128         }
 129         head = vq->vq_desc_head_idx;
 130
 131         PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
 132                 "vq->hw->cvq = %p vq = %p",
 133                 vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
 134
 135         if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
 136                 return -1;
 137
 138         memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
 139                 sizeof(struct virtio_pmd_ctrl));
 140
 141         /*
 142          * Format is enforced in qemu code:
 143          * One TX packet for header;
 144          * At least one TX packet per argument;
 145          * One RX packet for ACK.
 146          */
 147         vq->vq_ring.desc[head].flags = VRING_DESC_F_NEXT;
 148         vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
 149         vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
 150         vq->vq_free_cnt--;
 151         i = vq->vq_ring.desc[head].next;
 152
 153         for (k = 0; k < pkt_num; k++) {
 154                 vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
 155                 vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 156                         + sizeof(struct virtio_net_ctrl_hdr)
 157                         + sizeof(ctrl->status) + sizeof(uint8_t)*sum;
 158                 vq->vq_ring.desc[i].len = dlen[k];
 159                 sum += dlen[k];
 160                 vq->vq_free_cnt--;
 161                 i = vq->vq_ring.desc[i].next;
 162         }
 163
 164         vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
 165         vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
 166                         + sizeof(struct virtio_net_ctrl_hdr);
 167         vq->vq_ring.desc[i].len = sizeof(ctrl->status);
 168         vq->vq_free_cnt--;
 169
 170         vq->vq_desc_head_idx = vq->vq_ring.desc[i].next;
 171
 172         vq_update_avail_ring(vq, head);
 173         vq_update_avail_idx(vq);
 174
 175         PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
 176
 177         virtqueue_notify(vq);
 178
 179         rte_rmb();
 180         while (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
 181                 rte_rmb();
 182                 usleep(100);
 183         }
 184
 185         while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
 186                 uint32_t idx, desc_idx, used_idx;
 187                 struct vring_used_elem *uep;
 188
 189                 used_idx = (uint32_t)(vq->vq_used_cons_idx
 190                                 & (vq->vq_nentries - 1));
 191                 uep = &vq->vq_ring.used->ring[used_idx];
 192                 idx = (uint32_t) uep->id;
 193                 desc_idx = idx;
 194
 195                 while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
 196                         desc_idx = vq->vq_ring.desc[desc_idx].next;
 197                         vq->vq_free_cnt++;
 198                 }
 199
 200                 vq->vq_ring.desc[desc_idx].next = vq->vq_desc_head_idx;
 201                 vq->vq_desc_head_idx = idx;
 202
 203                 vq->vq_used_cons_idx++;
 204                 vq->vq_free_cnt++;
 205         }
 206
 207         PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
 208                         vq->vq_free_cnt, vq->vq_desc_head_idx);
 209
 210         memcpy(&result, vq->virtio_net_hdr_mz->addr,
 211                         sizeof(struct virtio_pmd_ctrl));
 212
 213         return result.status;
 214 }
 215
 216 static int
 217 virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
 218 {
 219         struct virtio_hw *hw = dev->data->dev_private;
 220         struct virtio_pmd_ctrl ctrl;
 221         int dlen[1];
 222         int ret;
 223
 224         ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
 225         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
 226         memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
 227
 228         dlen[0] = sizeof(uint16_t);
 229
 230         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 231         if (ret) {
 232                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 233                           "failed, this is too late now...");
 234                 return -EINVAL;
 235         }
 236
 237         return 0;
 238 }
 239
 240 void
 241 virtio_dev_queue_release(struct virtqueue *vq) {
 242         struct virtio_hw *hw;
 243
 244         if (vq) {
 245                 hw = vq->hw;
 246                 /* Select and deactivate the queue */
 247                 VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vq->queue_id);
 248                 VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN, 0);
 249
 250                 rte_free(vq);
 251                 vq = NULL;
 252         }
 253 }
 254
 255 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 256                         int queue_type,
 257                         uint16_t queue_idx,
 258                         uint16_t vtpci_queue_idx,
 259                         uint16_t nb_desc,
 260                         unsigned int socket_id,
 261                         struct virtqueue **pvq)
 262 {
 263         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 264         const struct rte_memzone *mz;
 265         unsigned int vq_size, size;
 266         struct virtio_hw *hw = dev->data->dev_private;
 267         struct virtqueue *vq = NULL;
 268
 269         /* Write the virtqueue index to the Queue Select Field */
 270         VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
 271         PMD_INIT_LOG(DEBUG, "selecting queue: %u", vtpci_queue_idx);
 272
 273         /*
 274          * Read the virtqueue size from the Queue Size field
 275          * Always power of 2 and if 0 virtqueue does not exist
 276          */
 277         vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
 278         PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc);
 279         if (vq_size == 0) {
 280                 PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
 281                 return -EINVAL;
 282         }
 283
 284         if (!rte_is_power_of_2(vq_size)) {
 285                 PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
 286                 return -EINVAL;
 287         }
 288
 289         if (queue_type == VTNET_RQ) {
 290                 snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
 291                         dev->data->port_id, queue_idx);
 292                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 293                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 294         } else if (queue_type == VTNET_TQ) {
 295                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
 296                         dev->data->port_id, queue_idx);
 297                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 298                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 299         } else if (queue_type == VTNET_CQ) {
 300                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
 301                         dev->data->port_id);
 302                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 303                         vq_size * sizeof(struct vq_desc_extra),
 304                         RTE_CACHE_LINE_SIZE);
 305         }
 306         if (vq == NULL) {
 307                 PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__);
 308                 return (-ENOMEM);
 309         }
 310
 311         vq->hw = hw;
 312         vq->port_id = dev->data->port_id;
 313         vq->queue_id = queue_idx;
 314         vq->vq_queue_index = vtpci_queue_idx;
 315         vq->vq_nentries = vq_size;
 316
 317         if (nb_desc == 0 || nb_desc > vq_size)
 318                 nb_desc = vq_size;
 319         vq->vq_free_cnt = nb_desc;
 320
 321         /*
 322          * Reserve a memzone for vring elements
 323          */
 324         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 325         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 326         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
 327
 328         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 329                 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
 330         if (mz == NULL) {
 331                 if (rte_errno == EEXIST)
 332                         mz = rte_memzone_lookup(vq_name);
 333                 if (mz == NULL) {
 334                         rte_free(vq);
 335                         return -ENOMEM;
 336                 }
 337         }
 338
 339         /*
 340          * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
 341          * and only accepts 32 bit page frame number.
 342          * Check if the allocated physical memory exceeds 16TB.
 343          */
 344         if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
 345                 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
 346                 rte_free(vq);
 347                 return -ENOMEM;
 348         }
 349
 350         memset(mz->addr, 0, sizeof(mz->len));
 351         vq->mz = mz;
 352         vq->vq_ring_mem = mz->phys_addr;
 353         vq->vq_ring_virt_mem = mz->addr;
 354         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64, (uint64_t)mz->phys_addr);
 355         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
 356         vq->virtio_net_hdr_mz  = NULL;
 357         vq->virtio_net_hdr_mem = 0;
 358
 359         if (queue_type == VTNET_TQ) {
 360                 /*
 361                  * For each xmit packet, allocate a virtio_net_hdr
 362                  */
 363                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
 364                         dev->data->port_id, queue_idx);
 365                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 366                         vq_size * hw->vtnet_hdr_size,
 367                         socket_id, 0, RTE_CACHE_LINE_SIZE);
 368                 if (vq->virtio_net_hdr_mz == NULL) {
 369                         if (rte_errno == EEXIST)
 370                                 vq->virtio_net_hdr_mz =
 371                                         rte_memzone_lookup(vq_name);
 372                         if (vq->virtio_net_hdr_mz == NULL) {
 373                                 rte_free(vq);
 374                                 return -ENOMEM;
 375                         }
 376                 }
 377                 vq->virtio_net_hdr_mem =
 378                         vq->virtio_net_hdr_mz->phys_addr;
 379                 memset(vq->virtio_net_hdr_mz->addr, 0,
 380                         vq_size * hw->vtnet_hdr_size);
 381         } else if (queue_type == VTNET_CQ) {
 382                 /* Allocate a page for control vq command, data and status */
 383                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
 384                         dev->data->port_id);
 385                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 386                         PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
 387                 if (vq->virtio_net_hdr_mz == NULL) {
 388                         if (rte_errno == EEXIST)
 389                                 vq->virtio_net_hdr_mz =
 390                                         rte_memzone_lookup(vq_name);
 391                         if (vq->virtio_net_hdr_mz == NULL) {
 392                                 rte_free(vq);
 393                                 return -ENOMEM;
 394                         }
 395                 }
 396                 vq->virtio_net_hdr_mem =
 397                         vq->virtio_net_hdr_mz->phys_addr;
 398                 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 399         }
 400
 401         /*
 402          * Set guest physical address of the virtqueue
 403          * in VIRTIO_PCI_QUEUE_PFN config register of device
 404          */
 405         VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
 406                         mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
 407         *pvq = vq;
 408         return 0;
 409 }
 410
 411 static int
 412 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 413                 uint32_t socket_id)
 414 {
 415         struct virtqueue *vq;
 416         int ret;
 417         struct virtio_hw *hw = dev->data->dev_private;
 418
 419         PMD_INIT_FUNC_TRACE();
 420         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 421                         vtpci_queue_idx, 0, socket_id, &vq);
 422         if (ret < 0) {
 423                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 424                 return ret;
 425         }
 426
 427         hw->cvq = vq;
 428         return 0;
 429 }
 430
 431 static void
 432 virtio_free_queues(struct rte_eth_dev *dev)
 433 {
 434         unsigned int i;
 435
 436         for (i = 0; i < dev->data->nb_rx_queues; i++)
 437                 virtio_dev_rx_queue_release(dev->data->rx_queues[i]);
 438
 439         dev->data->nb_rx_queues = 0;
 440
 441         for (i = 0; i < dev->data->nb_tx_queues; i++)
 442                 virtio_dev_tx_queue_release(dev->data->tx_queues[i]);
 443
 444         dev->data->nb_tx_queues = 0;
 445 }
 446
 447 static void
 448 virtio_dev_close(struct rte_eth_dev *dev)
 449 {
 450         struct virtio_hw *hw = dev->data->dev_private;
 451         struct rte_pci_device *pci_dev = dev->pci_dev;
 452
 453         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 454
 455         /* reset the NIC */
 456         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
 457                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 458         vtpci_reset(hw);
 459         hw->started = 0;
 460         virtio_dev_free_mbufs(dev);
 461         virtio_free_queues(dev);
 462 }
 463
 464 static void
 465 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 466 {
 467         struct virtio_hw *hw = dev->data->dev_private;
 468         struct virtio_pmd_ctrl ctrl;
 469         int dlen[1];
 470         int ret;
 471
 472         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 473                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 474                 return;
 475         }
 476
 477         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 478         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 479         ctrl.data[0] = 1;
 480         dlen[0] = 1;
 481
 482         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 483         if (ret)
 484                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 485 }
 486
 487 static void
 488 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 489 {
 490         struct virtio_hw *hw = dev->data->dev_private;
 491         struct virtio_pmd_ctrl ctrl;
 492         int dlen[1];
 493         int ret;
 494
 495         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 496                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 497                 return;
 498         }
 499
 500         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 501         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 502         ctrl.data[0] = 0;
 503         dlen[0] = 1;
 504
 505         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 506         if (ret)
 507                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 508 }
 509
 510 static void
 511 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 512 {
 513         struct virtio_hw *hw = dev->data->dev_private;
 514         struct virtio_pmd_ctrl ctrl;
 515         int dlen[1];
 516         int ret;
 517
 518         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 519                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 520                 return;
 521         }
 522
 523         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 524         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 525         ctrl.data[0] = 1;
 526         dlen[0] = 1;
 527
 528         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 529         if (ret)
 530                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 531 }
 532
 533 static void
 534 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 535 {
 536         struct virtio_hw *hw = dev->data->dev_private;
 537         struct virtio_pmd_ctrl ctrl;
 538         int dlen[1];
 539         int ret;
 540
 541         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 542                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 543                 return;
 544         }
 545
 546         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 547         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 548         ctrl.data[0] = 0;
 549         dlen[0] = 1;
 550
 551         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 552         if (ret)
 553                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 554 }
 555
 556 /*
 557  * dev_ops for virtio, bare necessities for basic operation
 558  */
 559 static const struct eth_dev_ops virtio_eth_dev_ops = {
 560         .dev_configure           = virtio_dev_configure,
 561         .dev_start               = virtio_dev_start,
 562         .dev_stop                = virtio_dev_stop,
 563         .dev_close               = virtio_dev_close,
 564         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 565         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 566         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 567         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 568
 569         .dev_infos_get           = virtio_dev_info_get,
 570         .stats_get               = virtio_dev_stats_get,
 571         .stats_reset             = virtio_dev_stats_reset,
 572         .link_update             = virtio_dev_link_update,
 573         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 574         .rx_queue_release        = virtio_dev_rx_queue_release,
 575         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 576         .tx_queue_release        = virtio_dev_tx_queue_release,
 577         /* collect stats per queue */
 578         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 579         .vlan_filter_set         = virtio_vlan_filter_set,
 580         .mac_addr_add            = virtio_mac_addr_add,
 581         .mac_addr_remove         = virtio_mac_addr_remove,
 582         .mac_addr_set            = virtio_mac_addr_set,
 583 };
 584
 585 static inline int
 586 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 587                                 struct rte_eth_link *link)
 588 {
 589         struct rte_eth_link *dst = link;
 590         struct rte_eth_link *src = &(dev->data->dev_link);
 591
 592         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 593                         *(uint64_t *)src) == 0)
 594                 return -1;
 595
 596         return 0;
 597 }
 598
 599 /**
 600  * Atomically writes the link status information into global
 601  * structure rte_eth_dev.
 602  *
 603  * @param dev
 604  *   - Pointer to the structure rte_eth_dev to read from.
 605  *   - Pointer to the buffer to be saved with the link status.
 606  *
 607  * @return
 608  *   - On success, zero.
 609  *   - On failure, negative value.
 610  */
 611 static inline int
 612 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 613                 struct rte_eth_link *link)
 614 {
 615         struct rte_eth_link *dst = &(dev->data->dev_link);
 616         struct rte_eth_link *src = link;
 617
 618         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 619                                         *(uint64_t *)src) == 0)
 620                 return -1;
 621
 622         return 0;
 623 }
 624
 625 static void
 626 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 627 {
 628         unsigned i;
 629
 630         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 631                 const struct virtqueue *txvq = dev->data->tx_queues[i];
 632                 if (txvq == NULL)
 633                         continue;
 634
 635                 stats->opackets += txvq->packets;
 636                 stats->obytes += txvq->bytes;
 637                 stats->oerrors += txvq->errors;
 638
 639                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 640                         stats->q_opackets[i] = txvq->packets;
 641                         stats->q_obytes[i] = txvq->bytes;
 642                 }
 643         }
 644
 645         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 646                 const struct virtqueue *rxvq = dev->data->rx_queues[i];
 647                 if (rxvq == NULL)
 648                         continue;
 649
 650                 stats->ipackets += rxvq->packets;
 651                 stats->ibytes += rxvq->bytes;
 652                 stats->ierrors += rxvq->errors;
 653
 654                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 655                         stats->q_ipackets[i] = rxvq->packets;
 656                         stats->q_ibytes[i] = rxvq->bytes;
 657                 }
 658         }
 659
 660         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 661 }
 662
 663 static void
 664 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 665 {
 666         unsigned int i;
 667
 668         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 669                 struct virtqueue *txvq = dev->data->tx_queues[i];
 670                 if (txvq == NULL)
 671                         continue;
 672
 673                 txvq->packets = 0;
 674                 txvq->bytes = 0;
 675                 txvq->errors = 0;
 676         }
 677
 678         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 679                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 680                 if (rxvq == NULL)
 681                         continue;
 682
 683                 rxvq->packets = 0;
 684                 rxvq->bytes = 0;
 685                 rxvq->errors = 0;
 686         }
 687
 688         dev->data->rx_mbuf_alloc_failed = 0;
 689 }
 690
 691 static void
 692 virtio_set_hwaddr(struct virtio_hw *hw)
 693 {
 694         vtpci_write_dev_config(hw,
 695                         offsetof(struct virtio_net_config, mac),
 696                         &hw->mac_addr, ETHER_ADDR_LEN);
 697 }
 698
 699 static void
 700 virtio_get_hwaddr(struct virtio_hw *hw)
 701 {
 702         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 703                 vtpci_read_dev_config(hw,
 704                         offsetof(struct virtio_net_config, mac),
 705                         &hw->mac_addr, ETHER_ADDR_LEN);
 706         } else {
 707                 eth_random_addr(&hw->mac_addr[0]);
 708                 virtio_set_hwaddr(hw);
 709         }
 710 }
 711
 712 static void
 713 virtio_mac_table_set(struct virtio_hw *hw,
 714                      const struct virtio_net_ctrl_mac *uc,
 715                      const struct virtio_net_ctrl_mac *mc)
 716 {
 717         struct virtio_pmd_ctrl ctrl;
 718         int err, len[2];
 719
 720         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 721                 PMD_DRV_LOG(INFO, "host does not support mac table\n");
 722                 return;
 723         }
 724
 725         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 726         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 727
 728         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 729         memcpy(ctrl.data, uc, len[0]);
 730
 731         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 732         memcpy(ctrl.data + len[0], mc, len[1]);
 733
 734         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 735         if (err != 0)
 736                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 737 }
 738
 739 static void
 740 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 741                     uint32_t index, uint32_t vmdq __rte_unused)
 742 {
 743         struct virtio_hw *hw = dev->data->dev_private;
 744         const struct ether_addr *addrs = dev->data->mac_addrs;
 745         unsigned int i;
 746         struct virtio_net_ctrl_mac *uc, *mc;
 747
 748         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 749                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 750                 return;
 751         }
 752
 753         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 754         uc->entries = 0;
 755         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 756         mc->entries = 0;
 757
 758         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 759                 const struct ether_addr *addr
 760                         = (i == index) ? mac_addr : addrs + i;
 761                 struct virtio_net_ctrl_mac *tbl
 762                         = is_multicast_ether_addr(addr) ? mc : uc;
 763
 764                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 765         }
 766
 767         virtio_mac_table_set(hw, uc, mc);
 768 }
 769
 770 static void
 771 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 772 {
 773         struct virtio_hw *hw = dev->data->dev_private;
 774         struct ether_addr *addrs = dev->data->mac_addrs;
 775         struct virtio_net_ctrl_mac *uc, *mc;
 776         unsigned int i;
 777
 778         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 779                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 780                 return;
 781         }
 782
 783         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 784         uc->entries = 0;
 785         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 786         mc->entries = 0;
 787
 788         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 789                 struct virtio_net_ctrl_mac *tbl;
 790
 791                 if (i == index || is_zero_ether_addr(addrs + i))
 792                         continue;
 793
 794                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
 795                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
 796         }
 797
 798         virtio_mac_table_set(hw, uc, mc);
 799 }
 800
 801 static void
 802 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
 803 {
 804         struct virtio_hw *hw = dev->data->dev_private;
 805
 806         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
 807
 808         /* Use atomic update if available */
 809         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 810                 struct virtio_pmd_ctrl ctrl;
 811                 int len = ETHER_ADDR_LEN;
 812
 813                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 814                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
 815
 816                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
 817                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
 818         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
 819                 virtio_set_hwaddr(hw);
 820 }
 821
 822 static int
 823 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 824 {
 825         struct virtio_hw *hw = dev->data->dev_private;
 826         struct virtio_pmd_ctrl ctrl;
 827         int len;
 828
 829         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
 830                 return -ENOTSUP;
 831
 832         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
 833         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
 834         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
 835         len = sizeof(vlan_id);
 836
 837         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
 838 }
 839
 840 static void
 841 virtio_negotiate_features(struct virtio_hw *hw)
 842 {
 843         uint32_t host_features;
 844
 845         /* Prepare guest_features: feature that driver wants to support */
 846         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
 847         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
 848                 hw->guest_features);
 849
 850         /* Read device(host) feature bits */
 851         host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
 852         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
 853                 host_features);
 854
 855         /*
 856          * Negotiate features: Subset of device feature bits are written back
 857          * guest feature bits.
 858          */
 859         hw->guest_features = vtpci_negotiate_features(hw, host_features);
 860         PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
 861                 hw->guest_features);
 862 }
 863
 864 #ifdef RTE_EXEC_ENV_LINUXAPP
 865 static int
 866 parse_sysfs_value(const char *filename, unsigned long *val)
 867 {
 868         FILE *f;
 869         char buf[BUFSIZ];
 870         char *end = NULL;
 871
 872         f = fopen(filename, "r");
 873         if (f == NULL) {
 874                 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
 875                              __func__, filename);
 876                 return -1;
 877         }
 878
 879         if (fgets(buf, sizeof(buf), f) == NULL) {
 880                 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
 881                              __func__, filename);
 882                 fclose(f);
 883                 return -1;
 884         }
 885         *val = strtoul(buf, &end, 0);
 886         if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
 887                 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
 888                              __func__, filename);
 889                 fclose(f);
 890                 return -1;
 891         }
 892         fclose(f);
 893         return 0;
 894 }
 895
 896 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen,
 897                         unsigned int *uio_num)
 898 {
 899         struct dirent *e;
 900         DIR *dir;
 901         char dirname[PATH_MAX];
 902
 903         /* depending on kernel version, uio can be located in uio/uioX
 904          * or uio:uioX */
 905         snprintf(dirname, sizeof(dirname),
 906                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
 907                      loc->domain, loc->bus, loc->devid, loc->function);
 908         dir = opendir(dirname);
 909         if (dir == NULL) {
 910                 /* retry with the parent directory */
 911                 snprintf(dirname, sizeof(dirname),
 912                              SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
 913                              loc->domain, loc->bus, loc->devid, loc->function);
 914                 dir = opendir(dirname);
 915
 916                 if (dir == NULL) {
 917                         PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
 918                         return -1;
 919                 }
 920         }
 921
 922         /* take the first file starting with "uio" */
 923         while ((e = readdir(dir)) != NULL) {
 924                 /* format could be uio%d ...*/
 925                 int shortprefix_len = sizeof("uio") - 1;
 926                 /* ... or uio:uio%d */
 927                 int longprefix_len = sizeof("uio:uio") - 1;
 928                 char *endptr;
 929
 930                 if (strncmp(e->d_name, "uio", 3) != 0)
 931                         continue;
 932
 933                 /* first try uio%d */
 934                 errno = 0;
 935                 *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
 936                 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
 937                         snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num);
 938                         break;
 939                 }
 940
 941                 /* then try uio:uio%d */
 942                 errno = 0;
 943                 *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
 944                 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
 945                         snprintf(buf, buflen, "%s/uio:uio%u", dirname,
 946                                      *uio_num);
 947                         break;
 948                 }
 949         }
 950         closedir(dir);
 951
 952         /* No uio resource found */
 953         if (e == NULL) {
 954                 PMD_INIT_LOG(ERR, "Could not find uio resource");
 955                 return -1;
 956         }
 957
 958         return 0;
 959 }
 960
 961 static int
 962 virtio_has_msix(const struct rte_pci_addr *loc)
 963 {
 964         DIR *d;
 965         char dirname[PATH_MAX];
 966
 967         snprintf(dirname, sizeof(dirname),
 968                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
 969                      loc->domain, loc->bus, loc->devid, loc->function);
 970
 971         d = opendir(dirname);
 972         if (d)
 973                 closedir(d);
 974
 975         return (d != NULL);
 976 }
 977
 978 /* Extract I/O port numbers from sysfs */
 979 static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
 980 {
 981         char dirname[PATH_MAX];
 982         char filename[PATH_MAX];
 983         unsigned long start, size;
 984         unsigned int uio_num;
 985
 986         if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
 987                 return -1;
 988
 989         /* get portio size */
 990         snprintf(filename, sizeof(filename),
 991                      "%s/portio/port0/size", dirname);
 992         if (parse_sysfs_value(filename, &size) < 0) {
 993                 PMD_INIT_LOG(ERR, "%s(): cannot parse size",
 994                              __func__);
 995                 return -1;
 996         }
 997
 998         /* get portio start */
 999         snprintf(filename, sizeof(filename),
1000                  "%s/portio/port0/start", dirname);
1001         if (parse_sysfs_value(filename, &start) < 0) {
1002                 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
1003                              __func__);
1004                 return -1;
1005         }
1006         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
1007         pci_dev->mem_resource[0].len =  (uint64_t)size;
1008         PMD_INIT_LOG(DEBUG,
1009                      "PCI Port IO found start=0x%lx with size=0x%lx",
1010                      start, size);
1011
1012         /* save fd */
1013         memset(dirname, 0, sizeof(dirname));
1014         snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
1015         pci_dev->intr_handle.fd = open(dirname, O_RDWR);
1016         if (pci_dev->intr_handle.fd < 0) {
1017                 PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
1018                         dirname, strerror(errno));
1019                 return -1;
1020         }
1021
1022         pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
1023         pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
1024
1025         return 0;
1026 }
1027
1028 /* Extract port I/O numbers from proc/ioports */
1029 static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
1030 {
1031         uint16_t start, end;
1032         int size;
1033         FILE *fp;
1034         char *line = NULL;
1035         char pci_id[16];
1036         int found = 0;
1037         size_t linesz;
1038
1039         snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
1040                  pci_dev->addr.domain,
1041                  pci_dev->addr.bus,
1042                  pci_dev->addr.devid,
1043                  pci_dev->addr.function);
1044
1045         fp = fopen("/proc/ioports", "r");
1046         if (fp == NULL) {
1047                 PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
1048                 return -1;
1049         }
1050
1051         while (getdelim(&line, &linesz, '\n', fp) > 0) {
1052                 char *ptr = line;
1053                 char *left;
1054                 int n;
1055
1056                 n = strcspn(ptr, ":");
1057                 ptr[n] = 0;
1058                 left = &ptr[n+1];
1059
1060                 while (*left && isspace(*left))
1061                         left++;
1062
1063                 if (!strncmp(left, pci_id, strlen(pci_id))) {
1064                         found = 1;
1065
1066                         while (*ptr && isspace(*ptr))
1067                                 ptr++;
1068
1069                         sscanf(ptr, "%04hx-%04hx", &start, &end);
1070                         size = end - start + 1;
1071
1072                         break;
1073                 }
1074         }
1075
1076         free(line);
1077         fclose(fp);
1078
1079         if (!found)
1080                 return -1;
1081
1082         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
1083         pci_dev->mem_resource[0].len =  (uint64_t)size;
1084         PMD_INIT_LOG(DEBUG,
1085                 "PCI Port IO found start=0x%x with size=0x%x",
1086                 start, size);
1087
1088         /* can't support lsc interrupt without uio */
1089         pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1090
1091         return 0;
1092 }
1093
1094 /* Extract I/O port numbers from sysfs */
1095 static int virtio_resource_init(struct rte_pci_device *pci_dev)
1096 {
1097         if (virtio_resource_init_by_uio(pci_dev) == 0)
1098                 return 0;
1099         else
1100                 return virtio_resource_init_by_ioports(pci_dev);
1101 }
1102
1103 #else
1104 static int
1105 virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
1106 {
1107         /* nic_uio does not enable interrupts, return 0 (false). */
1108         return 0;
1109 }
1110
1111 static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
1112 {
1113         /* no setup required */
1114         return 0;
1115 }
1116 #endif
1117
1118 /*
1119  * Process Virtio Config changed interrupt and call the callback
1120  * if link state changed.
1121  */
1122 static void
1123 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1124                          void *param)
1125 {
1126         struct rte_eth_dev *dev = param;
1127         struct virtio_hw *hw = dev->data->dev_private;
1128         uint8_t isr;
1129
1130         /* Read interrupt status which clears interrupt */
1131         isr = vtpci_isr(hw);
1132         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1133
1134         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1135                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1136
1137         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1138                 if (virtio_dev_link_update(dev, 0) == 0)
1139                         _rte_eth_dev_callback_process(dev,
1140                                                       RTE_ETH_EVENT_INTR_LSC);
1141         }
1142
1143 }
1144
1145 static void
1146 rx_func_get(struct rte_eth_dev *eth_dev)
1147 {
1148         struct virtio_hw *hw = eth_dev->data->dev_private;
1149         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1150                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1151         else
1152                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1153 }
1154
1155 /*
1156  * This function is based on probe() function in virtio_pci.c
1157  * It returns 0 on success.
1158  */
1159 static int
1160 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1161 {
1162         struct virtio_hw *hw = eth_dev->data->dev_private;
1163         struct virtio_net_config *config;
1164         struct virtio_net_config local_config;
1165         uint32_t offset_conf = sizeof(config->mac);
1166         struct rte_pci_device *pci_dev;
1167
1168         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
1169
1170         eth_dev->dev_ops = &virtio_eth_dev_ops;
1171         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1172
1173         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1174                 rx_func_get(eth_dev);
1175                 return 0;
1176         }
1177
1178         /* Allocate memory for storing MAC addresses */
1179         eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
1180         if (eth_dev->data->mac_addrs == NULL) {
1181                 PMD_INIT_LOG(ERR,
1182                         "Failed to allocate %d bytes needed to store MAC addresses",
1183                         ETHER_ADDR_LEN);
1184                 return -ENOMEM;
1185         }
1186
1187         pci_dev = eth_dev->pci_dev;
1188         if (virtio_resource_init(pci_dev) < 0)
1189                 return -1;
1190
1191         hw->use_msix = virtio_has_msix(&pci_dev->addr);
1192         hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
1193
1194         /* Reset the device although not necessary at startup */
1195         vtpci_reset(hw);
1196
1197         /* Tell the host we've noticed this device. */
1198         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1199
1200         /* Tell the host we've known how to drive the device. */
1201         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1202         virtio_negotiate_features(hw);
1203
1204         /* If host does not support status then disable LSC */
1205         if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
1206                 pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1207
1208         rx_func_get(eth_dev);
1209
1210         /* Setting up rx_header size for the device */
1211         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1212                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1213         else
1214                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1215
1216         /* Copy the permanent MAC address to: virtio_hw */
1217         virtio_get_hwaddr(hw);
1218         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1219                         &eth_dev->data->mac_addrs[0]);
1220         PMD_INIT_LOG(DEBUG,
1221                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1222                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1223                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1224
1225         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1226                 config = &local_config;
1227
1228                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1229                         offset_conf += sizeof(config->status);
1230                 } else {
1231                         PMD_INIT_LOG(DEBUG,
1232                                      "VIRTIO_NET_F_STATUS is not supported");
1233                         config->status = 0;
1234                 }
1235
1236                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1237                         offset_conf += sizeof(config->max_virtqueue_pairs);
1238                 } else {
1239                         PMD_INIT_LOG(DEBUG,
1240                                      "VIRTIO_NET_F_MQ is not supported");
1241                         config->max_virtqueue_pairs = 1;
1242                 }
1243
1244                 vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf);
1245
1246                 hw->max_rx_queues =
1247                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1248                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1249                 hw->max_tx_queues =
1250                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1251                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1252
1253                 virtio_dev_cq_queue_setup(eth_dev,
1254                                         config->max_virtqueue_pairs * 2,
1255                                         SOCKET_ID_ANY);
1256
1257                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1258                                 config->max_virtqueue_pairs);
1259                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1260                 PMD_INIT_LOG(DEBUG,
1261                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1262                                 config->mac[0], config->mac[1],
1263                                 config->mac[2], config->mac[3],
1264                                 config->mac[4], config->mac[5]);
1265         } else {
1266                 hw->max_rx_queues = 1;
1267                 hw->max_tx_queues = 1;
1268         }
1269
1270         eth_dev->data->nb_rx_queues = hw->max_rx_queues;
1271         eth_dev->data->nb_tx_queues = hw->max_tx_queues;
1272
1273         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1274                         hw->max_rx_queues, hw->max_tx_queues);
1275         PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1276                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1277                         pci_dev->id.device_id);
1278
1279         /* Setup interrupt callback  */
1280         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1281                 rte_intr_callback_register(&pci_dev->intr_handle,
1282                                    virtio_interrupt_handler, eth_dev);
1283
1284         virtio_dev_cq_start(eth_dev);
1285
1286         return 0;
1287 }
1288
1289 static int
1290 eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
1291 {
1292         struct rte_pci_device *pci_dev;
1293         struct virtio_hw *hw = eth_dev->data->dev_private;
1294
1295         PMD_INIT_FUNC_TRACE();
1296
1297         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
1298                 return -EPERM;
1299
1300         if (hw->started == 1) {
1301                 virtio_dev_stop(eth_dev);
1302                 virtio_dev_close(eth_dev);
1303         }
1304         pci_dev = eth_dev->pci_dev;
1305
1306         eth_dev->dev_ops = NULL;
1307         eth_dev->tx_pkt_burst = NULL;
1308         eth_dev->rx_pkt_burst = NULL;
1309
1310         virtio_dev_queue_release(hw->cvq);
1311
1312         rte_free(eth_dev->data->mac_addrs);
1313         eth_dev->data->mac_addrs = NULL;
1314
1315         /* reset interrupt callback  */
1316         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1317                 rte_intr_callback_unregister(&pci_dev->intr_handle,
1318                                                 virtio_interrupt_handler,
1319                                                 eth_dev);
1320
1321         PMD_INIT_LOG(DEBUG, "dev_uninit completed");
1322
1323         return 0;
1324 }
1325
1326 static struct eth_driver rte_virtio_pmd = {
1327         .pci_drv = {
1328                 .name = "rte_virtio_pmd",
1329                 .id_table = pci_id_virtio_map,
1330                 .drv_flags = RTE_PCI_DRV_DETACHABLE,
1331         },
1332         .eth_dev_init = eth_virtio_dev_init,
1333         .eth_dev_uninit = eth_virtio_dev_uninit,
1334         .dev_private_size = sizeof(struct virtio_hw),
1335 };
1336
1337 /*
1338  * Driver initialization routine.
1339  * Invoked once at EAL init time.
1340  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1341  * Returns 0 on success.
1342  */
1343 static int
1344 rte_virtio_pmd_init(const char *name __rte_unused,
1345                     const char *param __rte_unused)
1346 {
1347         if (rte_eal_iopl_init() != 0) {
1348                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1349                 return -1;
1350         }
1351
1352         rte_eth_driver_register(&rte_virtio_pmd);
1353         return 0;
1354 }
1355
1356 /*
1357  * Configure virtio device
1358  * It returns 0 on success.
1359  */
1360 static int
1361 virtio_dev_configure(struct rte_eth_dev *dev)
1362 {
1363         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1364         struct virtio_hw *hw = dev->data->dev_private;
1365         struct rte_pci_device *pci_dev = dev->pci_dev;
1366
1367         PMD_INIT_LOG(DEBUG, "configure");
1368
1369         if (rxmode->hw_ip_checksum) {
1370                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1371                 return (-EINVAL);
1372         }
1373
1374         hw->vlan_strip = rxmode->hw_vlan_strip;
1375
1376         if (rxmode->hw_vlan_filter
1377             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1378                 PMD_DRV_LOG(NOTICE,
1379                             "vlan filtering not available on this host");
1380                 return -ENOTSUP;
1381         }
1382
1383         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1384                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1385                         PMD_DRV_LOG(ERR, "failed to set config vector");
1386                         return -EBUSY;
1387                 }
1388
1389         return 0;
1390 }
1391
1392
1393 static int
1394 virtio_dev_start(struct rte_eth_dev *dev)
1395 {
1396         uint16_t nb_queues, i;
1397         struct virtio_hw *hw = dev->data->dev_private;
1398         struct rte_pci_device *pci_dev = dev->pci_dev;
1399
1400         /* check if lsc interrupt feature is enabled */
1401         if (dev->data->dev_conf.intr_conf.lsc) {
1402                 if (!(pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
1403                         PMD_DRV_LOG(ERR, "link status not supported by host");
1404                         return -ENOTSUP;
1405                 }
1406
1407                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1408                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1409                         return -EIO;
1410                 }
1411         }
1412
1413         /* Initialize Link state */
1414         virtio_dev_link_update(dev, 0);
1415
1416         /* On restart after stop do not touch queues */
1417         if (hw->started)
1418                 return 0;
1419
1420         /* Do final configuration before rx/tx engine starts */
1421         virtio_dev_rxtx_start(dev);
1422         vtpci_reinit_complete(hw);
1423
1424         hw->started = 1;
1425
1426         /*Notify the backend
1427          *Otherwise the tap backend might already stop its queue due to fullness.
1428          *vhost backend will have no chance to be waked up
1429          */
1430         nb_queues = dev->data->nb_rx_queues;
1431         if (nb_queues > 1) {
1432                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1433                         return -EINVAL;
1434         }
1435
1436         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1437
1438         for (i = 0; i < nb_queues; i++)
1439                 virtqueue_notify(dev->data->rx_queues[i]);
1440
1441         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1442
1443         for (i = 0; i < dev->data->nb_rx_queues; i++)
1444                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1445
1446         for (i = 0; i < dev->data->nb_tx_queues; i++)
1447                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1448
1449         return 0;
1450 }
1451
1452 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1453 {
1454         struct rte_mbuf *buf;
1455         int i, mbuf_num = 0;
1456
1457         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1458                 PMD_INIT_LOG(DEBUG,
1459                              "Before freeing rxq[%d] used and unused buf", i);
1460                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1461
1462                 PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p",
1463                                 i, dev->data->rx_queues[i]);
1464                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1465                                         dev->data->rx_queues[i])) != NULL) {
1466                         rte_pktmbuf_free(buf);
1467                         mbuf_num++;
1468                 }
1469
1470                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1471                 PMD_INIT_LOG(DEBUG,
1472                              "After freeing rxq[%d] used and unused buf", i);
1473                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1474         }
1475
1476         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1477                 PMD_INIT_LOG(DEBUG,
1478                              "Before freeing txq[%d] used and unused bufs",
1479                              i);
1480                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1481
1482                 mbuf_num = 0;
1483                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1484                                         dev->data->tx_queues[i])) != NULL) {
1485                         rte_pktmbuf_free(buf);
1486
1487                         mbuf_num++;
1488                 }
1489
1490                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1491                 PMD_INIT_LOG(DEBUG,
1492                              "After freeing txq[%d] used and unused buf", i);
1493                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1494         }
1495 }
1496
1497 /*
1498  * Stop device: disable interrupt and mark link down
1499  */
1500 static void
1501 virtio_dev_stop(struct rte_eth_dev *dev)
1502 {
1503         struct rte_eth_link link;
1504
1505         PMD_INIT_LOG(DEBUG, "stop");
1506
1507         if (dev->data->dev_conf.intr_conf.lsc)
1508                 rte_intr_disable(&dev->pci_dev->intr_handle);
1509
1510         memset(&link, 0, sizeof(link));
1511         virtio_dev_atomic_write_link_status(dev, &link);
1512 }
1513
1514 static int
1515 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1516 {
1517         struct rte_eth_link link, old;
1518         uint16_t status;
1519         struct virtio_hw *hw = dev->data->dev_private;
1520         memset(&link, 0, sizeof(link));
1521         virtio_dev_atomic_read_link_status(dev, &link);
1522         old = link;
1523         link.link_duplex = FULL_DUPLEX;
1524         link.link_speed  = SPEED_10G;
1525
1526         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1527                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1528                 vtpci_read_dev_config(hw,
1529                                 offsetof(struct virtio_net_config, status),
1530                                 &status, sizeof(status));
1531                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1532                         link.link_status = 0;
1533                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1534                                      dev->data->port_id);
1535                 } else {
1536                         link.link_status = 1;
1537                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1538                                      dev->data->port_id);
1539                 }
1540         } else {
1541                 link.link_status = 1;   /* Link up */
1542         }
1543         virtio_dev_atomic_write_link_status(dev, &link);
1544
1545         return (old.link_status == link.link_status) ? -1 : 0;
1546 }
1547
1548 static void
1549 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1550 {
1551         struct virtio_hw *hw = dev->data->dev_private;
1552
1553         dev_info->driver_name = dev->driver->pci_drv.name;
1554         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1555         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1556         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1557         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1558         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1559         dev_info->default_txconf = (struct rte_eth_txconf) {
1560                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1561         };
1562 }
1563
1564 /*
1565  * It enables testpmd to collect per queue stats.
1566  */
1567 static int
1568 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1569 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1570 __rte_unused uint8_t is_rx)
1571 {
1572         return 0;
1573 }
1574
1575 static struct rte_driver rte_virtio_driver = {
1576         .type = PMD_PDEV,
1577         .init = rte_virtio_pmd_init,
1578 };
1579
1580 PMD_REGISTER_DRIVER(rte_virtio_driver);