drivers/net/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 rte_eth_dev *eth_dev);
  66 static int  virtio_dev_configure(struct rte_eth_dev *dev);
  67 static int  virtio_dev_start(struct rte_eth_dev *dev);
  68 static void virtio_dev_stop(struct rte_eth_dev *dev);
  69 static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
  70 static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
  71 static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
  72 static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
  73 static void virtio_dev_info_get(struct rte_eth_dev *dev,
  74                                 struct rte_eth_dev_info *dev_info);
  75 static int virtio_dev_link_update(struct rte_eth_dev *dev,
  76         __rte_unused int wait_to_complete);
  77
  78 static void virtio_set_hwaddr(struct virtio_hw *hw);
  79 static void virtio_get_hwaddr(struct virtio_hw *hw);
  80
  81 static void virtio_dev_rx_queue_release(__rte_unused void *rxq);
  82 static void virtio_dev_tx_queue_release(__rte_unused void *txq);
  83
  84 static void virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats);
  85 static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
  86 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
  87 static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
  88                                 uint16_t vlan_id, int on);
  89 static void virtio_mac_addr_add(struct rte_eth_dev *dev,
  90                                 struct ether_addr *mac_addr,
  91                                 uint32_t index, uint32_t vmdq __rte_unused);
  92 static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
  93 static void virtio_mac_addr_set(struct rte_eth_dev *dev,
  94                                 struct ether_addr *mac_addr);
  95
  96 static int virtio_dev_queue_stats_mapping_set(
  97         __rte_unused struct rte_eth_dev *eth_dev,
  98         __rte_unused uint16_t queue_id,
  99         __rte_unused uint8_t stat_idx,
 100         __rte_unused uint8_t is_rx);
 101
 102 /*
 103  * The set of PCI devices this driver supports
 104  */
 105 static const struct rte_pci_id pci_id_virtio_map[] = {
 106
 107 #define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
 108 #include "rte_pci_dev_ids.h"
 109
 110 { .vendor_id = 0, /* sentinel */ },
 111 };
 112
 113 static int
 114 virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
 115                 int *dlen, int pkt_num)
 116 {
 117         uint32_t head, i;
 118         int k, sum = 0;
 119         virtio_net_ctrl_ack status = ~0;
 120         struct virtio_pmd_ctrl result;
 121
 122         ctrl->status = status;
 123
 124         if (!(vq && vq->hw->cvq)) {
 125                 PMD_INIT_LOG(ERR,
 126                              "%s(): Control queue is not supported.",
 127                              __func__);
 128                 return -1;
 129         }
 130         head = vq->vq_desc_head_idx;
 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         if (ret) {
 233                 PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
 234                           "failed, this is too late now...");
 235                 return -EINVAL;
 236         }
 237
 238         return 0;
 239 }
 240
 241 int virtio_dev_queue_setup(struct rte_eth_dev *dev,
 242                         int queue_type,
 243                         uint16_t queue_idx,
 244                         uint16_t  vtpci_queue_idx,
 245                         uint16_t nb_desc,
 246                         unsigned int socket_id,
 247                         struct virtqueue **pvq)
 248 {
 249         char vq_name[VIRTQUEUE_MAX_NAME_SZ];
 250         const struct rte_memzone *mz;
 251         uint16_t vq_size;
 252         int size;
 253         struct virtio_hw *hw = dev->data->dev_private;
 254         struct virtqueue  *vq = NULL;
 255
 256         /* Write the virtqueue index to the Queue Select Field */
 257         VIRTIO_WRITE_REG_2(hw, VIRTIO_PCI_QUEUE_SEL, vtpci_queue_idx);
 258         PMD_INIT_LOG(DEBUG, "selecting queue: %d", vtpci_queue_idx);
 259
 260         /*
 261          * Read the virtqueue size from the Queue Size field
 262          * Always power of 2 and if 0 virtqueue does not exist
 263          */
 264         vq_size = VIRTIO_READ_REG_2(hw, VIRTIO_PCI_QUEUE_NUM);
 265         PMD_INIT_LOG(DEBUG, "vq_size: %d nb_desc:%d", vq_size, nb_desc);
 266         if (nb_desc == 0)
 267                 nb_desc = vq_size;
 268         if (vq_size == 0) {
 269                 PMD_INIT_LOG(ERR, "%s: virtqueue does not exist", __func__);
 270                 return -EINVAL;
 271         }
 272
 273         if (!rte_is_power_of_2(vq_size)) {
 274                 PMD_INIT_LOG(ERR, "%s: virtqueue size is not powerof 2", __func__);
 275                 return -EINVAL;
 276         }
 277
 278         if (nb_desc < vq_size) {
 279                 if (!rte_is_power_of_2(nb_desc)) {
 280                         PMD_INIT_LOG(ERR,
 281                                      "nb_desc(%u) size is not powerof 2",
 282                                      nb_desc);
 283                         return -EINVAL;
 284                 }
 285                 vq_size = nb_desc;
 286         }
 287
 288         if (queue_type == VTNET_RQ) {
 289                 snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
 290                         dev->data->port_id, queue_idx);
 291                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 292                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 293         } else if (queue_type == VTNET_TQ) {
 294                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
 295                         dev->data->port_id, queue_idx);
 296                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 297                         vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
 298         } else if (queue_type == VTNET_CQ) {
 299                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
 300                         dev->data->port_id);
 301                 vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
 302                         vq_size * sizeof(struct vq_desc_extra),
 303                         RTE_CACHE_LINE_SIZE);
 304         }
 305         if (vq == NULL) {
 306                 PMD_INIT_LOG(ERR, "%s: Can not allocate virtqueue", __func__);
 307                 return (-ENOMEM);
 308         }
 309
 310         vq->hw = hw;
 311         vq->port_id = dev->data->port_id;
 312         vq->queue_id = queue_idx;
 313         vq->vq_queue_index = vtpci_queue_idx;
 314         vq->vq_nentries = vq_size;
 315         vq->vq_free_cnt = vq_size;
 316
 317         /*
 318          * Reserve a memzone for vring elements
 319          */
 320         size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN);
 321         vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
 322         PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size);
 323
 324         mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
 325                 socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
 326         if (mz == NULL) {
 327                 rte_free(vq);
 328                 return -ENOMEM;
 329         }
 330
 331         /*
 332          * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
 333          * and only accepts 32 bit page frame number.
 334          * Check if the allocated physical memory exceeds 16TB.
 335          */
 336         if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
 337                 PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
 338                 rte_free(vq);
 339                 return -ENOMEM;
 340         }
 341
 342         memset(mz->addr, 0, sizeof(mz->len));
 343         vq->mz = mz;
 344         vq->vq_ring_mem = mz->phys_addr;
 345         vq->vq_ring_virt_mem = mz->addr;
 346         PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64, (uint64_t)mz->phys_addr);
 347         PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
 348         vq->virtio_net_hdr_mz  = NULL;
 349         vq->virtio_net_hdr_mem = 0;
 350
 351         if (queue_type == VTNET_TQ) {
 352                 /*
 353                  * For each xmit packet, allocate a virtio_net_hdr
 354                  */
 355                 snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
 356                         dev->data->port_id, queue_idx);
 357                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 358                         vq_size * hw->vtnet_hdr_size,
 359                         socket_id, 0, RTE_CACHE_LINE_SIZE);
 360                 if (vq->virtio_net_hdr_mz == NULL) {
 361                         rte_free(vq);
 362                         return -ENOMEM;
 363                 }
 364                 vq->virtio_net_hdr_mem =
 365                         vq->virtio_net_hdr_mz->phys_addr;
 366                 memset(vq->virtio_net_hdr_mz->addr, 0,
 367                         vq_size * hw->vtnet_hdr_size);
 368         } else if (queue_type == VTNET_CQ) {
 369                 /* Allocate a page for control vq command, data and status */
 370                 snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
 371                         dev->data->port_id);
 372                 vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
 373                         PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
 374                 if (vq->virtio_net_hdr_mz == NULL) {
 375                         rte_free(vq);
 376                         return -ENOMEM;
 377                 }
 378                 vq->virtio_net_hdr_mem =
 379                         vq->virtio_net_hdr_mz->phys_addr;
 380                 memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
 381         }
 382
 383         /*
 384          * Set guest physical address of the virtqueue
 385          * in VIRTIO_PCI_QUEUE_PFN config register of device
 386          */
 387         VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_QUEUE_PFN,
 388                         mz->phys_addr >> VIRTIO_PCI_QUEUE_ADDR_SHIFT);
 389         *pvq = vq;
 390         return 0;
 391 }
 392
 393 static int
 394 virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
 395                 uint32_t socket_id)
 396 {
 397         struct virtqueue *vq;
 398         uint16_t nb_desc = 0;
 399         int ret;
 400         struct virtio_hw *hw = dev->data->dev_private;
 401
 402         PMD_INIT_FUNC_TRACE();
 403         ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
 404                         vtpci_queue_idx, nb_desc, socket_id, &vq);
 405         if (ret < 0) {
 406                 PMD_INIT_LOG(ERR, "control vq initialization failed");
 407                 return ret;
 408         }
 409
 410         hw->cvq = vq;
 411         return 0;
 412 }
 413
 414 static void
 415 virtio_dev_close(struct rte_eth_dev *dev)
 416 {
 417         struct virtio_hw *hw = dev->data->dev_private;
 418         struct rte_pci_device *pci_dev = dev->pci_dev;
 419
 420         PMD_INIT_LOG(DEBUG, "virtio_dev_close");
 421
 422         /* reset the NIC */
 423         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
 424                 vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
 425         vtpci_reset(hw);
 426         hw->started = 0;
 427         virtio_dev_free_mbufs(dev);
 428 }
 429
 430 static void
 431 virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
 432 {
 433         struct virtio_hw *hw = dev->data->dev_private;
 434         struct virtio_pmd_ctrl ctrl;
 435         int dlen[1];
 436         int ret;
 437
 438         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 439                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 440                 return;
 441         }
 442
 443         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 444         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 445         ctrl.data[0] = 1;
 446         dlen[0] = 1;
 447
 448         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 449         if (ret)
 450                 PMD_INIT_LOG(ERR, "Failed to enable promisc");
 451 }
 452
 453 static void
 454 virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
 455 {
 456         struct virtio_hw *hw = dev->data->dev_private;
 457         struct virtio_pmd_ctrl ctrl;
 458         int dlen[1];
 459         int ret;
 460
 461         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 462                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 463                 return;
 464         }
 465
 466         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 467         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
 468         ctrl.data[0] = 0;
 469         dlen[0] = 1;
 470
 471         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 472         if (ret)
 473                 PMD_INIT_LOG(ERR, "Failed to disable promisc");
 474 }
 475
 476 static void
 477 virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
 478 {
 479         struct virtio_hw *hw = dev->data->dev_private;
 480         struct virtio_pmd_ctrl ctrl;
 481         int dlen[1];
 482         int ret;
 483
 484         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 485                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 486                 return;
 487         }
 488
 489         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 490         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 491         ctrl.data[0] = 1;
 492         dlen[0] = 1;
 493
 494         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 495         if (ret)
 496                 PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
 497 }
 498
 499 static void
 500 virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
 501 {
 502         struct virtio_hw *hw = dev->data->dev_private;
 503         struct virtio_pmd_ctrl ctrl;
 504         int dlen[1];
 505         int ret;
 506
 507         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
 508                 PMD_INIT_LOG(INFO, "host does not support rx control\n");
 509                 return;
 510         }
 511
 512         ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
 513         ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
 514         ctrl.data[0] = 0;
 515         dlen[0] = 1;
 516
 517         ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
 518         if (ret)
 519                 PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
 520 }
 521
 522 /*
 523  * dev_ops for virtio, bare necessities for basic operation
 524  */
 525 static const struct eth_dev_ops virtio_eth_dev_ops = {
 526         .dev_configure           = virtio_dev_configure,
 527         .dev_start               = virtio_dev_start,
 528         .dev_stop                = virtio_dev_stop,
 529         .dev_close               = virtio_dev_close,
 530         .promiscuous_enable      = virtio_dev_promiscuous_enable,
 531         .promiscuous_disable     = virtio_dev_promiscuous_disable,
 532         .allmulticast_enable     = virtio_dev_allmulticast_enable,
 533         .allmulticast_disable    = virtio_dev_allmulticast_disable,
 534
 535         .dev_infos_get           = virtio_dev_info_get,
 536         .stats_get               = virtio_dev_stats_get,
 537         .stats_reset             = virtio_dev_stats_reset,
 538         .link_update             = virtio_dev_link_update,
 539         .rx_queue_setup          = virtio_dev_rx_queue_setup,
 540         /* meaningfull only to multiple queue */
 541         .rx_queue_release        = virtio_dev_rx_queue_release,
 542         .tx_queue_setup          = virtio_dev_tx_queue_setup,
 543         /* meaningfull only to multiple queue */
 544         .tx_queue_release        = virtio_dev_tx_queue_release,
 545         /* collect stats per queue */
 546         .queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
 547         .vlan_filter_set         = virtio_vlan_filter_set,
 548         .mac_addr_add            = virtio_mac_addr_add,
 549         .mac_addr_remove         = virtio_mac_addr_remove,
 550         .mac_addr_set            = virtio_mac_addr_set,
 551 };
 552
 553 static inline int
 554 virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
 555                                 struct rte_eth_link *link)
 556 {
 557         struct rte_eth_link *dst = link;
 558         struct rte_eth_link *src = &(dev->data->dev_link);
 559
 560         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 561                         *(uint64_t *)src) == 0)
 562                 return -1;
 563
 564         return 0;
 565 }
 566
 567 /**
 568  * Atomically writes the link status information into global
 569  * structure rte_eth_dev.
 570  *
 571  * @param dev
 572  *   - Pointer to the structure rte_eth_dev to read from.
 573  *   - Pointer to the buffer to be saved with the link status.
 574  *
 575  * @return
 576  *   - On success, zero.
 577  *   - On failure, negative value.
 578  */
 579 static inline int
 580 virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
 581                 struct rte_eth_link *link)
 582 {
 583         struct rte_eth_link *dst = &(dev->data->dev_link);
 584         struct rte_eth_link *src = link;
 585
 586         if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
 587                                         *(uint64_t *)src) == 0)
 588                 return -1;
 589
 590         return 0;
 591 }
 592
 593 static void
 594 virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 595 {
 596         unsigned i;
 597
 598         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 599                 const struct virtqueue *txvq = dev->data->tx_queues[i];
 600                 if (txvq == NULL)
 601                         continue;
 602
 603                 stats->opackets += txvq->packets;
 604                 stats->obytes += txvq->bytes;
 605                 stats->oerrors += txvq->errors;
 606
 607                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 608                         stats->q_opackets[i] = txvq->packets;
 609                         stats->q_obytes[i] = txvq->bytes;
 610                 }
 611         }
 612
 613         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 614                 const struct virtqueue *rxvq = dev->data->rx_queues[i];
 615                 if (rxvq == NULL)
 616                         continue;
 617
 618                 stats->ipackets += rxvq->packets;
 619                 stats->ibytes += rxvq->bytes;
 620                 stats->ierrors += rxvq->errors;
 621
 622                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 623                         stats->q_ipackets[i] = rxvq->packets;
 624                         stats->q_ibytes[i] = rxvq->bytes;
 625                 }
 626         }
 627
 628         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 629 }
 630
 631 static void
 632 virtio_dev_stats_reset(struct rte_eth_dev *dev)
 633 {
 634         unsigned int i;
 635
 636         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 637                 struct virtqueue *txvq = dev->data->tx_queues[i];
 638                 if (txvq == NULL)
 639                         continue;
 640
 641                 txvq->packets = 0;
 642                 txvq->bytes = 0;
 643                 txvq->errors = 0;
 644         }
 645
 646         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 647                 struct virtqueue *rxvq = dev->data->rx_queues[i];
 648                 if (rxvq == NULL)
 649                         continue;
 650
 651                 rxvq->packets = 0;
 652                 rxvq->bytes = 0;
 653                 rxvq->errors = 0;
 654         }
 655
 656         dev->data->rx_mbuf_alloc_failed = 0;
 657 }
 658
 659 static void
 660 virtio_set_hwaddr(struct virtio_hw *hw)
 661 {
 662         vtpci_write_dev_config(hw,
 663                         offsetof(struct virtio_net_config, mac),
 664                         &hw->mac_addr, ETHER_ADDR_LEN);
 665 }
 666
 667 static void
 668 virtio_get_hwaddr(struct virtio_hw *hw)
 669 {
 670         if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
 671                 vtpci_read_dev_config(hw,
 672                         offsetof(struct virtio_net_config, mac),
 673                         &hw->mac_addr, ETHER_ADDR_LEN);
 674         } else {
 675                 eth_random_addr(&hw->mac_addr[0]);
 676                 virtio_set_hwaddr(hw);
 677         }
 678 }
 679
 680 static void
 681 virtio_mac_table_set(struct virtio_hw *hw,
 682                      const struct virtio_net_ctrl_mac *uc,
 683                      const struct virtio_net_ctrl_mac *mc)
 684 {
 685         struct virtio_pmd_ctrl ctrl;
 686         int err, len[2];
 687
 688         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 689                 PMD_DRV_LOG(INFO, "host does not support mac table\n");
 690                 return;
 691         }
 692
 693         ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 694         ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
 695
 696         len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
 697         memcpy(ctrl.data, uc, len[0]);
 698
 699         len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
 700         memcpy(ctrl.data + len[0], mc, len[1]);
 701
 702         err = virtio_send_command(hw->cvq, &ctrl, len, 2);
 703         if (err != 0)
 704                 PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
 705 }
 706
 707 static void
 708 virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
 709                     uint32_t index, uint32_t vmdq __rte_unused)
 710 {
 711         struct virtio_hw *hw = dev->data->dev_private;
 712         const struct ether_addr *addrs = dev->data->mac_addrs;
 713         unsigned int i;
 714         struct virtio_net_ctrl_mac *uc, *mc;
 715
 716         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 717                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 718                 return;
 719         }
 720
 721         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 722         uc->entries = 0;
 723         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 724         mc->entries = 0;
 725
 726         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 727                 const struct ether_addr *addr
 728                         = (i == index) ? mac_addr : addrs + i;
 729                 struct virtio_net_ctrl_mac *tbl
 730                         = is_multicast_ether_addr(addr) ? mc : uc;
 731
 732                 memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
 733         }
 734
 735         virtio_mac_table_set(hw, uc, mc);
 736 }
 737
 738 static void
 739 virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
 740 {
 741         struct virtio_hw *hw = dev->data->dev_private;
 742         struct ether_addr *addrs = dev->data->mac_addrs;
 743         struct virtio_net_ctrl_mac *uc, *mc;
 744         unsigned int i;
 745
 746         if (index >= VIRTIO_MAX_MAC_ADDRS) {
 747                 PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
 748                 return;
 749         }
 750
 751         uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
 752         uc->entries = 0;
 753         mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
 754         mc->entries = 0;
 755
 756         for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
 757                 struct virtio_net_ctrl_mac *tbl;
 758
 759                 if (i == index || is_zero_ether_addr(addrs + i))
 760                         continue;
 761
 762                 tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
 763                 memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
 764         }
 765
 766         virtio_mac_table_set(hw, uc, mc);
 767 }
 768
 769 static void
 770 virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
 771 {
 772         struct virtio_hw *hw = dev->data->dev_private;
 773
 774         memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
 775
 776         /* Use atomic update if available */
 777         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
 778                 struct virtio_pmd_ctrl ctrl;
 779                 int len = ETHER_ADDR_LEN;
 780
 781                 ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
 782                 ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
 783
 784                 memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
 785                 virtio_send_command(hw->cvq, &ctrl, &len, 1);
 786         } else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
 787                 virtio_set_hwaddr(hw);
 788 }
 789
 790 static int
 791 virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 792 {
 793         struct virtio_hw *hw = dev->data->dev_private;
 794         struct virtio_pmd_ctrl ctrl;
 795         int len;
 796
 797         if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
 798                 return -ENOTSUP;
 799
 800         ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
 801         ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
 802         memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
 803         len = sizeof(vlan_id);
 804
 805         return virtio_send_command(hw->cvq, &ctrl, &len, 1);
 806 }
 807
 808 static void
 809 virtio_negotiate_features(struct virtio_hw *hw)
 810 {
 811         uint32_t host_features;
 812
 813         /* Prepare guest_features: feature that driver wants to support */
 814         hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
 815         PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
 816                 hw->guest_features);
 817
 818         /* Read device(host) feature bits */
 819         host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
 820         PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
 821                 host_features);
 822
 823         /*
 824          * Negotiate features: Subset of device feature bits are written back
 825          * guest feature bits.
 826          */
 827         hw->guest_features = vtpci_negotiate_features(hw, host_features);
 828         PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
 829                 hw->guest_features);
 830 }
 831
 832 #ifdef RTE_EXEC_ENV_LINUXAPP
 833 static int
 834 parse_sysfs_value(const char *filename, unsigned long *val)
 835 {
 836         FILE *f;
 837         char buf[BUFSIZ];
 838         char *end = NULL;
 839
 840         f = fopen(filename, "r");
 841         if (f == NULL) {
 842                 PMD_INIT_LOG(ERR, "%s(): cannot open sysfs value %s",
 843                              __func__, filename);
 844                 return -1;
 845         }
 846
 847         if (fgets(buf, sizeof(buf), f) == NULL) {
 848                 PMD_INIT_LOG(ERR, "%s(): cannot read sysfs value %s",
 849                              __func__, filename);
 850                 fclose(f);
 851                 return -1;
 852         }
 853         *val = strtoul(buf, &end, 0);
 854         if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
 855                 PMD_INIT_LOG(ERR, "%s(): cannot parse sysfs value %s",
 856                              __func__, filename);
 857                 fclose(f);
 858                 return -1;
 859         }
 860         fclose(f);
 861         return 0;
 862 }
 863
 864 static int get_uio_dev(struct rte_pci_addr *loc, char *buf, unsigned int buflen,
 865                         unsigned int *uio_num)
 866 {
 867         struct dirent *e;
 868         DIR *dir;
 869         char dirname[PATH_MAX];
 870
 871         /* depending on kernel version, uio can be located in uio/uioX
 872          * or uio:uioX */
 873         snprintf(dirname, sizeof(dirname),
 874                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
 875                      loc->domain, loc->bus, loc->devid, loc->function);
 876         dir = opendir(dirname);
 877         if (dir == NULL) {
 878                 /* retry with the parent directory */
 879                 snprintf(dirname, sizeof(dirname),
 880                              SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
 881                              loc->domain, loc->bus, loc->devid, loc->function);
 882                 dir = opendir(dirname);
 883
 884                 if (dir == NULL) {
 885                         PMD_INIT_LOG(ERR, "Cannot opendir %s", dirname);
 886                         return -1;
 887                 }
 888         }
 889
 890         /* take the first file starting with "uio" */
 891         while ((e = readdir(dir)) != NULL) {
 892                 /* format could be uio%d ...*/
 893                 int shortprefix_len = sizeof("uio") - 1;
 894                 /* ... or uio:uio%d */
 895                 int longprefix_len = sizeof("uio:uio") - 1;
 896                 char *endptr;
 897
 898                 if (strncmp(e->d_name, "uio", 3) != 0)
 899                         continue;
 900
 901                 /* first try uio%d */
 902                 errno = 0;
 903                 *uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
 904                 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
 905                         snprintf(buf, buflen, "%s/uio%u", dirname, *uio_num);
 906                         break;
 907                 }
 908
 909                 /* then try uio:uio%d */
 910                 errno = 0;
 911                 *uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
 912                 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
 913                         snprintf(buf, buflen, "%s/uio:uio%u", dirname,
 914                                      *uio_num);
 915                         break;
 916                 }
 917         }
 918         closedir(dir);
 919
 920         /* No uio resource found */
 921         if (e == NULL) {
 922                 PMD_INIT_LOG(ERR, "Could not find uio resource");
 923                 return -1;
 924         }
 925
 926         return 0;
 927 }
 928
 929 static int
 930 virtio_has_msix(const struct rte_pci_addr *loc)
 931 {
 932         DIR *d;
 933         char dirname[PATH_MAX];
 934
 935         snprintf(dirname, sizeof(dirname),
 936                      SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/msi_irqs",
 937                      loc->domain, loc->bus, loc->devid, loc->function);
 938
 939         d = opendir(dirname);
 940         if (d)
 941                 closedir(d);
 942
 943         return (d != NULL);
 944 }
 945
 946 /* Extract I/O port numbers from sysfs */
 947 static int virtio_resource_init_by_uio(struct rte_pci_device *pci_dev)
 948 {
 949         char dirname[PATH_MAX];
 950         char filename[PATH_MAX];
 951         unsigned long start, size;
 952         unsigned int uio_num;
 953
 954         if (get_uio_dev(&pci_dev->addr, dirname, sizeof(dirname), &uio_num) < 0)
 955                 return -1;
 956
 957         /* get portio size */
 958         snprintf(filename, sizeof(filename),
 959                      "%s/portio/port0/size", dirname);
 960         if (parse_sysfs_value(filename, &size) < 0) {
 961                 PMD_INIT_LOG(ERR, "%s(): cannot parse size",
 962                              __func__);
 963                 return -1;
 964         }
 965
 966         /* get portio start */
 967         snprintf(filename, sizeof(filename),
 968                  "%s/portio/port0/start", dirname);
 969         if (parse_sysfs_value(filename, &start) < 0) {
 970                 PMD_INIT_LOG(ERR, "%s(): cannot parse portio start",
 971                              __func__);
 972                 return -1;
 973         }
 974         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)start;
 975         pci_dev->mem_resource[0].len =  (uint64_t)size;
 976         PMD_INIT_LOG(DEBUG,
 977                      "PCI Port IO found start=0x%lx with size=0x%lx",
 978                      start, size);
 979
 980         /* save fd */
 981         memset(dirname, 0, sizeof(dirname));
 982         snprintf(dirname, sizeof(dirname), "/dev/uio%u", uio_num);
 983         pci_dev->intr_handle.fd = open(dirname, O_RDWR);
 984         if (pci_dev->intr_handle.fd < 0) {
 985                 PMD_INIT_LOG(ERR, "Cannot open %s: %s\n",
 986                         dirname, strerror(errno));
 987                 return -1;
 988         }
 989
 990         pci_dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
 991         pci_dev->driver->drv_flags |= RTE_PCI_DRV_INTR_LSC;
 992
 993         return 0;
 994 }
 995
 996 /* Extract port I/O numbers from proc/ioports */
 997 static int virtio_resource_init_by_ioports(struct rte_pci_device *pci_dev)
 998 {
 999         uint16_t start, end;
1000         int size;
1001         FILE *fp;
1002         char *line = NULL;
1003         char pci_id[16];
1004         int found = 0;
1005         size_t linesz;
1006
1007         snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
1008                  pci_dev->addr.domain,
1009                  pci_dev->addr.bus,
1010                  pci_dev->addr.devid,
1011                  pci_dev->addr.function);
1012
1013         fp = fopen("/proc/ioports", "r");
1014         if (fp == NULL) {
1015                 PMD_INIT_LOG(ERR, "%s(): can't open ioports", __func__);
1016                 return -1;
1017         }
1018
1019         while (getdelim(&line, &linesz, '\n', fp) > 0) {
1020                 char *ptr = line;
1021                 char *left;
1022                 int n;
1023
1024                 n = strcspn(ptr, ":");
1025                 ptr[n] = 0;
1026                 left = &ptr[n+1];
1027
1028                 while (*left && isspace(*left))
1029                         left++;
1030
1031                 if (!strncmp(left, pci_id, strlen(pci_id))) {
1032                         found = 1;
1033
1034                         while (*ptr && isspace(*ptr))
1035                                 ptr++;
1036
1037                         sscanf(ptr, "%04hx-%04hx", &start, &end);
1038                         size = end - start + 1;
1039
1040                         break;
1041                 }
1042         }
1043
1044         free(line);
1045         fclose(fp);
1046
1047         if (!found)
1048                 return -1;
1049
1050         pci_dev->mem_resource[0].addr = (void *)(uintptr_t)(uint32_t)start;
1051         pci_dev->mem_resource[0].len =  (uint64_t)size;
1052         PMD_INIT_LOG(DEBUG,
1053                 "PCI Port IO found start=0x%x with size=0x%x",
1054                 start, size);
1055
1056         /* can't support lsc interrupt without uio */
1057         pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
1058
1059         return 0;
1060 }
1061
1062 /* Extract I/O port numbers from sysfs */
1063 static int virtio_resource_init(struct rte_pci_device *pci_dev)
1064 {
1065         if (virtio_resource_init_by_uio(pci_dev) == 0)
1066                 return 0;
1067         else
1068                 return virtio_resource_init_by_ioports(pci_dev);
1069 }
1070
1071 #else
1072 static int
1073 virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
1074 {
1075         /* nic_uio does not enable interrupts, return 0 (false). */
1076         return 0;
1077 }
1078
1079 static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
1080 {
1081         /* no setup required */
1082         return 0;
1083 }
1084 #endif
1085
1086 /*
1087  * Process Virtio Config changed interrupt and call the callback
1088  * if link state changed.
1089  */
1090 static void
1091 virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
1092                          void *param)
1093 {
1094         struct rte_eth_dev *dev = param;
1095         struct virtio_hw *hw = dev->data->dev_private;
1096         uint8_t isr;
1097
1098         /* Read interrupt status which clears interrupt */
1099         isr = vtpci_isr(hw);
1100         PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
1101
1102         if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
1103                 PMD_DRV_LOG(ERR, "interrupt enable failed");
1104
1105         if (isr & VIRTIO_PCI_ISR_CONFIG) {
1106                 if (virtio_dev_link_update(dev, 0) == 0)
1107                         _rte_eth_dev_callback_process(dev,
1108                                                       RTE_ETH_EVENT_INTR_LSC);
1109         }
1110
1111 }
1112
1113 static void
1114 rx_func_get(struct rte_eth_dev *eth_dev)
1115 {
1116         struct virtio_hw *hw = eth_dev->data->dev_private;
1117         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1118                 eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
1119         else
1120                 eth_dev->rx_pkt_burst = &virtio_recv_pkts;
1121 }
1122
1123 /*
1124  * This function is based on probe() function in virtio_pci.c
1125  * It returns 0 on success.
1126  */
1127 static int
1128 eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
1129 {
1130         struct virtio_hw *hw = eth_dev->data->dev_private;
1131         struct virtio_net_config *config;
1132         struct virtio_net_config local_config;
1133         uint32_t offset_conf = sizeof(config->mac);
1134         struct rte_pci_device *pci_dev;
1135
1136         RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
1137
1138         eth_dev->dev_ops = &virtio_eth_dev_ops;
1139         eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
1140
1141         if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1142                 rx_func_get(eth_dev);
1143                 return 0;
1144         }
1145
1146         /* Allocate memory for storing MAC addresses */
1147         eth_dev->data->mac_addrs = rte_zmalloc("virtio", ETHER_ADDR_LEN, 0);
1148         if (eth_dev->data->mac_addrs == NULL) {
1149                 PMD_INIT_LOG(ERR,
1150                         "Failed to allocate %d bytes needed to store MAC addresses",
1151                         ETHER_ADDR_LEN);
1152                 return -ENOMEM;
1153         }
1154
1155         pci_dev = eth_dev->pci_dev;
1156         if (virtio_resource_init(pci_dev) < 0)
1157                 return -1;
1158
1159         hw->use_msix = virtio_has_msix(&pci_dev->addr);
1160         hw->io_base = (uint32_t)(uintptr_t)pci_dev->mem_resource[0].addr;
1161
1162         /* Reset the device although not necessary at startup */
1163         vtpci_reset(hw);
1164
1165         /* Tell the host we've noticed this device. */
1166         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
1167
1168         /* Tell the host we've known how to drive the device. */
1169         vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
1170         virtio_negotiate_features(hw);
1171
1172         rx_func_get(eth_dev);
1173
1174         /* Setting up rx_header size for the device */
1175         if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
1176                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
1177         else
1178                 hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
1179
1180         /* Copy the permanent MAC address to: virtio_hw */
1181         virtio_get_hwaddr(hw);
1182         ether_addr_copy((struct ether_addr *) hw->mac_addr,
1183                         &eth_dev->data->mac_addrs[0]);
1184         PMD_INIT_LOG(DEBUG,
1185                      "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1186                      hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
1187                      hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
1188
1189         if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
1190                 config = &local_config;
1191
1192                 if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1193                         offset_conf += sizeof(config->status);
1194                 } else {
1195                         PMD_INIT_LOG(DEBUG,
1196                                      "VIRTIO_NET_F_STATUS is not supported");
1197                         config->status = 0;
1198                 }
1199
1200                 if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
1201                         offset_conf += sizeof(config->max_virtqueue_pairs);
1202                 } else {
1203                         PMD_INIT_LOG(DEBUG,
1204                                      "VIRTIO_NET_F_MQ is not supported");
1205                         config->max_virtqueue_pairs = 1;
1206                 }
1207
1208                 vtpci_read_dev_config(hw, 0, (uint8_t *)config, offset_conf);
1209
1210                 hw->max_rx_queues =
1211                         (VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
1212                         VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
1213                 hw->max_tx_queues =
1214                         (VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
1215                         VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
1216
1217                 virtio_dev_cq_queue_setup(eth_dev,
1218                                         config->max_virtqueue_pairs * 2,
1219                                         SOCKET_ID_ANY);
1220
1221                 PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
1222                                 config->max_virtqueue_pairs);
1223                 PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
1224                 PMD_INIT_LOG(DEBUG,
1225                                 "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
1226                                 config->mac[0], config->mac[1],
1227                                 config->mac[2], config->mac[3],
1228                                 config->mac[4], config->mac[5]);
1229         } else {
1230                 hw->max_rx_queues = 1;
1231                 hw->max_tx_queues = 1;
1232         }
1233
1234         eth_dev->data->nb_rx_queues = hw->max_rx_queues;
1235         eth_dev->data->nb_tx_queues = hw->max_tx_queues;
1236
1237         PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
1238                         hw->max_rx_queues, hw->max_tx_queues);
1239         PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
1240                         eth_dev->data->port_id, pci_dev->id.vendor_id,
1241                         pci_dev->id.device_id);
1242
1243         /* Setup interrupt callback  */
1244         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1245                 rte_intr_callback_register(&pci_dev->intr_handle,
1246                                    virtio_interrupt_handler, eth_dev);
1247
1248         virtio_dev_cq_start(eth_dev);
1249
1250         return 0;
1251 }
1252
1253 static struct eth_driver rte_virtio_pmd = {
1254         .pci_drv = {
1255                 .name = "rte_virtio_pmd",
1256                 .id_table = pci_id_virtio_map,
1257         },
1258         .eth_dev_init = eth_virtio_dev_init,
1259         .dev_private_size = sizeof(struct virtio_hw),
1260 };
1261
1262 /*
1263  * Driver initialization routine.
1264  * Invoked once at EAL init time.
1265  * Register itself as the [Poll Mode] Driver of PCI virtio devices.
1266  * Returns 0 on success.
1267  */
1268 static int
1269 rte_virtio_pmd_init(const char *name __rte_unused,
1270                     const char *param __rte_unused)
1271 {
1272         if (rte_eal_iopl_init() != 0) {
1273                 PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
1274                 return -1;
1275         }
1276
1277         rte_eth_driver_register(&rte_virtio_pmd);
1278         return 0;
1279 }
1280
1281 /*
1282  * Only 1 queue is supported, no queue release related operation
1283  */
1284 static void
1285 virtio_dev_rx_queue_release(__rte_unused void *rxq)
1286 {
1287 }
1288
1289 static void
1290 virtio_dev_tx_queue_release(__rte_unused void *txq)
1291 {
1292 }
1293
1294 /*
1295  * Configure virtio device
1296  * It returns 0 on success.
1297  */
1298 static int
1299 virtio_dev_configure(struct rte_eth_dev *dev)
1300 {
1301         const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
1302         struct virtio_hw *hw = dev->data->dev_private;
1303         struct rte_pci_device *pci_dev = dev->pci_dev;
1304
1305         PMD_INIT_LOG(DEBUG, "configure");
1306
1307         if (rxmode->hw_ip_checksum) {
1308                 PMD_DRV_LOG(ERR, "HW IP checksum not supported");
1309                 return (-EINVAL);
1310         }
1311
1312         hw->vlan_strip = rxmode->hw_vlan_strip;
1313
1314         if (rxmode->hw_vlan_filter
1315             && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
1316                 PMD_DRV_LOG(NOTICE,
1317                             "vlan filtering not available on this host");
1318                 return -ENOTSUP;
1319         }
1320
1321         if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
1322                 if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
1323                         PMD_DRV_LOG(ERR, "failed to set config vector");
1324                         return -EBUSY;
1325                 }
1326
1327         return 0;
1328 }
1329
1330
1331 static int
1332 virtio_dev_start(struct rte_eth_dev *dev)
1333 {
1334         uint16_t nb_queues, i;
1335         struct virtio_hw *hw = dev->data->dev_private;
1336         struct rte_pci_device *pci_dev = dev->pci_dev;
1337
1338         /* check if lsc interrupt feature is enabled */
1339         if ((dev->data->dev_conf.intr_conf.lsc) &&
1340                 (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
1341                 if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1342                         PMD_DRV_LOG(ERR, "link status not supported by host");
1343                         return -ENOTSUP;
1344                 }
1345
1346                 if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
1347                         PMD_DRV_LOG(ERR, "interrupt enable failed");
1348                         return -EIO;
1349                 }
1350         }
1351
1352         /* Initialize Link state */
1353         virtio_dev_link_update(dev, 0);
1354
1355         /* On restart after stop do not touch queues */
1356         if (hw->started)
1357                 return 0;
1358
1359         /* Do final configuration before rx/tx engine starts */
1360         virtio_dev_rxtx_start(dev);
1361         vtpci_reinit_complete(hw);
1362
1363         hw->started = 1;
1364
1365         /*Notify the backend
1366          *Otherwise the tap backend might already stop its queue due to fullness.
1367          *vhost backend will have no chance to be waked up
1368          */
1369         nb_queues = dev->data->nb_rx_queues;
1370         if (nb_queues > 1) {
1371                 if (virtio_set_multiple_queues(dev, nb_queues) != 0)
1372                         return -EINVAL;
1373         }
1374
1375         PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
1376
1377         for (i = 0; i < nb_queues; i++)
1378                 virtqueue_notify(dev->data->rx_queues[i]);
1379
1380         PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
1381
1382         for (i = 0; i < dev->data->nb_rx_queues; i++)
1383                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1384
1385         for (i = 0; i < dev->data->nb_tx_queues; i++)
1386                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1387
1388         return 0;
1389 }
1390
1391 static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
1392 {
1393         struct rte_mbuf *buf;
1394         int i, mbuf_num = 0;
1395
1396         for (i = 0; i < dev->data->nb_rx_queues; i++) {
1397                 PMD_INIT_LOG(DEBUG,
1398                              "Before freeing rxq[%d] used and unused buf", i);
1399                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1400
1401                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1402                                         dev->data->rx_queues[i])) != NULL) {
1403                         rte_pktmbuf_free(buf);
1404                         mbuf_num++;
1405                 }
1406
1407                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1408                 PMD_INIT_LOG(DEBUG,
1409                              "After freeing rxq[%d] used and unused buf", i);
1410                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
1411         }
1412
1413         for (i = 0; i < dev->data->nb_tx_queues; i++) {
1414                 PMD_INIT_LOG(DEBUG,
1415                              "Before freeing txq[%d] used and unused bufs",
1416                              i);
1417                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1418
1419                 mbuf_num = 0;
1420                 while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
1421                                         dev->data->tx_queues[i])) != NULL) {
1422                         rte_pktmbuf_free(buf);
1423
1424                         mbuf_num++;
1425                 }
1426
1427                 PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
1428                 PMD_INIT_LOG(DEBUG,
1429                              "After freeing txq[%d] used and unused buf", i);
1430                 VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
1431         }
1432 }
1433
1434 /*
1435  * Stop device: disable interrupt and mark link down
1436  */
1437 static void
1438 virtio_dev_stop(struct rte_eth_dev *dev)
1439 {
1440         struct rte_eth_link link;
1441
1442         PMD_INIT_LOG(DEBUG, "stop");
1443
1444         if (dev->data->dev_conf.intr_conf.lsc)
1445                 rte_intr_disable(&dev->pci_dev->intr_handle);
1446
1447         memset(&link, 0, sizeof(link));
1448         virtio_dev_atomic_write_link_status(dev, &link);
1449 }
1450
1451 static int
1452 virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
1453 {
1454         struct rte_eth_link link, old;
1455         uint16_t status;
1456         struct virtio_hw *hw = dev->data->dev_private;
1457         memset(&link, 0, sizeof(link));
1458         virtio_dev_atomic_read_link_status(dev, &link);
1459         old = link;
1460         link.link_duplex = FULL_DUPLEX;
1461         link.link_speed  = SPEED_10G;
1462
1463         if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
1464                 PMD_INIT_LOG(DEBUG, "Get link status from hw");
1465                 vtpci_read_dev_config(hw,
1466                                 offsetof(struct virtio_net_config, status),
1467                                 &status, sizeof(status));
1468                 if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
1469                         link.link_status = 0;
1470                         PMD_INIT_LOG(DEBUG, "Port %d is down",
1471                                      dev->data->port_id);
1472                 } else {
1473                         link.link_status = 1;
1474                         PMD_INIT_LOG(DEBUG, "Port %d is up",
1475                                      dev->data->port_id);
1476                 }
1477         } else {
1478                 link.link_status = 1;   /* Link up */
1479         }
1480         virtio_dev_atomic_write_link_status(dev, &link);
1481
1482         return (old.link_status == link.link_status) ? -1 : 0;
1483 }
1484
1485 static void
1486 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1487 {
1488         struct virtio_hw *hw = dev->data->dev_private;
1489
1490         dev_info->driver_name = dev->driver->pci_drv.name;
1491         dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
1492         dev_info->max_tx_queues = (uint16_t)hw->max_tx_queues;
1493         dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
1494         dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
1495         dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
1496         dev_info->default_txconf = (struct rte_eth_txconf) {
1497                 .txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
1498         };
1499 }
1500
1501 /*
1502  * It enables testpmd to collect per queue stats.
1503  */
1504 static int
1505 virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
1506 __rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
1507 __rte_unused uint8_t is_rx)
1508 {
1509         return 0;
1510 }
1511
1512 static struct rte_driver rte_virtio_driver = {
1513         .type = PMD_PDEV,
1514         .init = rte_virtio_pmd_init,
1515 };
1516
1517 PMD_REGISTER_DRIVER(rte_virtio_driver);