+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <linux/vhost.h>
-#include <linux/virtio_net.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <assert.h>
-#include <sys/mman.h>
-#include <unistd.h>
-#ifdef RTE_LIBRTE_VHOST_NUMA
-#include <numaif.h>
-#endif
-
-#include <sys/socket.h>
-
-#include <rte_ethdev.h>
-#include <rte_log.h>
-#include <rte_string_fns.h>
-#include <rte_memory.h>
-#include <rte_malloc.h>
-#include <rte_virtio_net.h>
-
-#include "vhost-net.h"
-
-#define MAX_VHOST_DEVICE 1024
-static struct virtio_net *vhost_devices[MAX_VHOST_DEVICE];
-
-/* device ops to add/remove device to/from data core. */
-struct virtio_net_device_ops const *notify_ops;
-
-#define VHOST_USER_F_PROTOCOL_FEATURES 30
-
-/* Features supported by this lib. */
-#define VHOST_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
- (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
- (1ULL << VIRTIO_NET_F_CTRL_RX) | \
- (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \
- (VHOST_SUPPORTS_MQ) | \
- (1ULL << VIRTIO_F_VERSION_1) | \
- (1ULL << VHOST_F_LOG_ALL) | \
- (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
- (1ULL << VIRTIO_NET_F_HOST_TSO4) | \
- (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
- (1ULL << VIRTIO_NET_F_CSUM) | \
- (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
- (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
- (1ULL << VIRTIO_NET_F_GUEST_TSO6))
-
-static uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES;
-
-
-/*
- * Converts QEMU virtual address to Vhost virtual address. This function is
- * used to convert the ring addresses to our address space.
- */
-static uint64_t
-qva_to_vva(struct virtio_net *dev, uint64_t qemu_va)
-{
- struct virtio_memory_regions *region;
- uint64_t vhost_va = 0;
- uint32_t regionidx = 0;
-
- /* Find the region where the address lives. */
- for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
- region = &dev->mem->regions[regionidx];
- if ((qemu_va >= region->userspace_address) &&
- (qemu_va <= region->userspace_address +
- region->memory_size)) {
- vhost_va = qemu_va + region->guest_phys_address +
- region->address_offset -
- region->userspace_address;
- break;
- }
- }
- return vhost_va;
-}
-
-struct virtio_net *
-get_device(int vid)
-{
- struct virtio_net *dev = vhost_devices[vid];
-
- if (unlikely(!dev)) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) device not found.\n", vid);
- }
-
- return dev;
-}
-
-static void
-cleanup_vq(struct vhost_virtqueue *vq, int destroy)
-{
- if ((vq->callfd >= 0) && (destroy != 0))
- close(vq->callfd);
- if (vq->kickfd >= 0)
- close(vq->kickfd);
-}
-
-/*
- * Unmap any memory, close any file descriptors and
- * free any memory owned by a device.
- */
-static void
-cleanup_device(struct virtio_net *dev, int destroy)
-{
- uint32_t i;
-
- vhost_backend_cleanup(dev);
-
- for (i = 0; i < dev->virt_qp_nb; i++) {
- cleanup_vq(dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_RXQ], destroy);
- cleanup_vq(dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_TXQ], destroy);
- }
-}
-
-/*
- * Release virtqueues and device memory.
- */
-static void
-free_device(struct virtio_net *dev)
-{
- uint32_t i;
-
- for (i = 0; i < dev->virt_qp_nb; i++)
- rte_free(dev->virtqueue[i * VIRTIO_QNUM]);
-
- rte_free(dev);
-}
-
-static void
-init_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
-{
- memset(vq, 0, sizeof(struct vhost_virtqueue));
-
- vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
- vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
-
- /* Backends are set to -1 indicating an inactive device. */
- vq->backend = -1;
-
- /* always set the default vq pair to enabled */
- if (qp_idx == 0)
- vq->enabled = 1;
-}
-
-static void
-init_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
-{
- uint32_t base_idx = qp_idx * VIRTIO_QNUM;
-
- init_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
- init_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
-}
-
-static void
-reset_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
-{
- int callfd;
-
- callfd = vq->callfd;
- init_vring_queue(vq, qp_idx);
- vq->callfd = callfd;
-}
-
-static void
-reset_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
-{
- uint32_t base_idx = qp_idx * VIRTIO_QNUM;
-
- reset_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
- reset_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
-}
-
-static int
-alloc_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
-{
- struct vhost_virtqueue *virtqueue = NULL;
- uint32_t virt_rx_q_idx = qp_idx * VIRTIO_QNUM + VIRTIO_RXQ;
- uint32_t virt_tx_q_idx = qp_idx * VIRTIO_QNUM + VIRTIO_TXQ;
-
- virtqueue = rte_malloc(NULL,
- sizeof(struct vhost_virtqueue) * VIRTIO_QNUM, 0);
- if (virtqueue == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to allocate memory for virt qp:%d.\n", qp_idx);
- return -1;
- }
-
- dev->virtqueue[virt_rx_q_idx] = virtqueue;
- dev->virtqueue[virt_tx_q_idx] = virtqueue + VIRTIO_TXQ;
-
- init_vring_queue_pair(dev, qp_idx);
-
- dev->virt_qp_nb += 1;
-
- return 0;
-}
-
-/*
- * Reset some variables in device structure, while keeping few
- * others untouched, such as vid, ifname, virt_qp_nb: they
- * should be same unless the device is removed.
- */
-static void
-reset_device(struct virtio_net *dev)
-{
- uint32_t i;
-
- dev->features = 0;
- dev->protocol_features = 0;
- dev->flags = 0;
-
- for (i = 0; i < dev->virt_qp_nb; i++)
- reset_vring_queue_pair(dev, i);
-}
-
-/*
- * Function is called from the CUSE open function. The device structure is
- * initialised and a new entry is added to the device configuration linked
- * list.
- */
-int
-vhost_new_device(void)
-{
- struct virtio_net *dev;
- int i;
-
- dev = rte_zmalloc(NULL, sizeof(struct virtio_net), 0);
- if (dev == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to allocate memory for new dev.\n");
- return -1;
- }
-
- for (i = 0; i < MAX_VHOST_DEVICE; i++) {
- if (vhost_devices[i] == NULL)
- break;
- }
- if (i == MAX_VHOST_DEVICE) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Failed to find a free slot for new device.\n");
- return -1;
- }
-
- vhost_devices[i] = dev;
- dev->vid = i;
-
- return i;
-}
-
-/*
- * Function is called from the CUSE release function. This function will
- * cleanup the device and remove it from device configuration linked list.
- */
-void
-vhost_destroy_device(int vid)
-{
- struct virtio_net *dev = get_device(vid);
-
- if (dev == NULL)
- return;
-
- if (dev->flags & VIRTIO_DEV_RUNNING) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(vid);
- }
-
- cleanup_device(dev, 1);
- free_device(dev);
-
- vhost_devices[vid] = NULL;
-}
-
-void
-vhost_set_ifname(int vid, const char *if_name, unsigned int if_len)
-{
- struct virtio_net *dev;
- unsigned int len;
-
- dev = get_device(vid);
- if (dev == NULL)
- return;
-
- len = if_len > sizeof(dev->ifname) ?
- sizeof(dev->ifname) : if_len;
-
- strncpy(dev->ifname, if_name, len);
- dev->ifname[sizeof(dev->ifname) - 1] = '\0';
-}
-
-
-/*
- * Called from CUSE IOCTL: VHOST_SET_OWNER
- * This function just returns success at the moment unless
- * the device hasn't been initialised.
- */
-int
-vhost_set_owner(int vid)
-{
- struct virtio_net *dev;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- return 0;
-}
-
-/*
- * Called from CUSE IOCTL: VHOST_RESET_OWNER
- */
-int
-vhost_reset_owner(int vid)
-{
- struct virtio_net *dev;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- if (dev->flags & VIRTIO_DEV_RUNNING) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(vid);
- }
-
- cleanup_device(dev, 0);
- reset_device(dev);
- return 0;
-}
-
-/*
- * Called from CUSE IOCTL: VHOST_GET_FEATURES
- * The features that we support are requested.
- */
-int
-vhost_get_features(int vid, uint64_t *pu)
-{
- struct virtio_net *dev;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- /* Send our supported features. */
- *pu = VHOST_FEATURES;
- return 0;
-}
-
-/*
- * Called from CUSE IOCTL: VHOST_SET_FEATURES
- * We receive the negotiated features supported by us and the virtio device.
- */
-int
-vhost_set_features(int vid, uint64_t *pu)
-{
- struct virtio_net *dev;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
- if (*pu & ~VHOST_FEATURES)
- return -1;
-
- dev->features = *pu;
- if (dev->features &
- ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
- dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
- } else {
- dev->vhost_hlen = sizeof(struct virtio_net_hdr);
- }
- LOG_DEBUG(VHOST_CONFIG,
- "(%d) mergeable RX buffers %s, virtio 1 %s\n",
- dev->vid,
- (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
- (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
-
- return 0;
-}
-
-/*
- * Called from CUSE IOCTL: VHOST_SET_VRING_NUM
- * The virtio device sends us the size of the descriptor ring.
- */
-int
-vhost_set_vring_num(int vid, struct vhost_vring_state *state)
-{
- struct virtio_net *dev;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- /* State->index refers to the queue index. The txq is 1, rxq is 0. */
- dev->virtqueue[state->index]->size = state->num;
-
- return 0;
-}
-
-/*
- * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
- * same numa node as the memory of vring descriptor.
- */
-#ifdef RTE_LIBRTE_VHOST_NUMA
-static struct virtio_net*
-numa_realloc(struct virtio_net *dev, int index)
-{
- int oldnode, newnode;
- struct virtio_net *old_dev;
- struct vhost_virtqueue *old_vq, *vq;
- int ret;
-
- /*
- * vq is allocated on pairs, we should try to do realloc
- * on first queue of one queue pair only.
- */
- if (index % VIRTIO_QNUM != 0)
- return dev;
-
- old_dev = dev;
- vq = old_vq = dev->virtqueue[index];
-
- ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
- MPOL_F_NODE | MPOL_F_ADDR);
-
- /* check if we need to reallocate vq */
- ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
- MPOL_F_NODE | MPOL_F_ADDR);
- if (ret) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Unable to get vq numa information.\n");
- return dev;
- }
- if (oldnode != newnode) {
- RTE_LOG(INFO, VHOST_CONFIG,
- "reallocate vq from %d to %d node\n", oldnode, newnode);
- vq = rte_malloc_socket(NULL, sizeof(*vq) * VIRTIO_QNUM, 0,
- newnode);
- if (!vq)
- return dev;
-
- memcpy(vq, old_vq, sizeof(*vq) * VIRTIO_QNUM);
- rte_free(old_vq);
- }
-
- /* check if we need to reallocate dev */
- ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
- MPOL_F_NODE | MPOL_F_ADDR);
- if (ret) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "Unable to get dev numa information.\n");
- goto out;
- }
- if (oldnode != newnode) {
- RTE_LOG(INFO, VHOST_CONFIG,
- "reallocate dev from %d to %d node\n",
- oldnode, newnode);
- dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
- if (!dev) {
- dev = old_dev;
- goto out;
- }
-
- memcpy(dev, old_dev, sizeof(*dev));
- rte_free(old_dev);
- }
-
-out:
- dev->virtqueue[index] = vq;
- dev->virtqueue[index + 1] = vq + 1;
- vhost_devices[dev->vid] = dev;
-
- return dev;
-}
-#else
-static struct virtio_net*
-numa_realloc(struct virtio_net *dev, int index __rte_unused)
-{
- return dev;
-}
-#endif
-
-/*
- * Called from CUSE IOCTL: VHOST_SET_VRING_ADDR
- * The virtio device sends us the desc, used and avail ring addresses.
- * This function then converts these to our address space.
- */
-int
-vhost_set_vring_addr(int vid, struct vhost_vring_addr *addr)
-{
- struct virtio_net *dev;
- struct vhost_virtqueue *vq;
-
- dev = get_device(vid);
- if ((dev == NULL) || (dev->mem == NULL))
- return -1;
-
- /* addr->index refers to the queue index. The txq 1, rxq is 0. */
- vq = dev->virtqueue[addr->index];
-
- /* The addresses are converted from QEMU virtual to Vhost virtual. */
- vq->desc = (struct vring_desc *)(uintptr_t)qva_to_vva(dev,
- addr->desc_user_addr);
- if (vq->desc == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to find desc ring address.\n",
- dev->vid);
- return -1;
- }
-
- dev = numa_realloc(dev, addr->index);
- vq = dev->virtqueue[addr->index];
-
- vq->avail = (struct vring_avail *)(uintptr_t)qva_to_vva(dev,
- addr->avail_user_addr);
- if (vq->avail == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to find avail ring address.\n",
- dev->vid);
- return -1;
- }
-
- vq->used = (struct vring_used *)(uintptr_t)qva_to_vva(dev,
- addr->used_user_addr);
- if (vq->used == 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to find used ring address.\n",
- dev->vid);
- return -1;
- }
-
- if (vq->last_used_idx != vq->used->idx) {
- RTE_LOG(WARNING, VHOST_CONFIG,
- "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
- "some packets maybe resent for Tx and dropped for Rx\n",
- vq->last_used_idx, vq->used->idx);
- vq->last_used_idx = vq->used->idx;
- }
-
- vq->log_guest_addr = addr->log_guest_addr;
-
- LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
- dev->vid, vq->desc);
- LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address avail: %p\n",
- dev->vid, vq->avail);
- LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address used: %p\n",
- dev->vid, vq->used);
- LOG_DEBUG(VHOST_CONFIG, "(%d) log_guest_addr: %" PRIx64 "\n",
- dev->vid, vq->log_guest_addr);
-
- return 0;
-}
-
-/*
- * Called from CUSE IOCTL: VHOST_SET_VRING_BASE
- * The virtio device sends us the available ring last used index.
- */
-int
-vhost_set_vring_base(int vid, struct vhost_vring_state *state)
-{
- struct virtio_net *dev;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- /* State->index refers to the queue index. The txq is 1, rxq is 0. */
- dev->virtqueue[state->index]->last_used_idx = state->num;
-
- return 0;
-}
-
-/*
- * Called from CUSE IOCTL: VHOST_GET_VRING_BASE
- * We send the virtio device our available ring last used index.
- */
-int
-vhost_get_vring_base(int vid, uint32_t index,
- struct vhost_vring_state *state)
-{
- struct virtio_net *dev;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- state->index = index;
- /* State->index refers to the queue index. The txq is 1, rxq is 0. */
- state->num = dev->virtqueue[state->index]->last_used_idx;
-
- return 0;
-}
-
-
-/*
- * Called from CUSE IOCTL: VHOST_SET_VRING_CALL
- * The virtio device sends an eventfd to interrupt the guest. This fd gets
- * copied into our process space.
- */
-int
-vhost_set_vring_call(int vid, struct vhost_vring_file *file)
-{
- struct virtio_net *dev;
- struct vhost_virtqueue *vq;
- uint32_t cur_qp_idx = file->index / VIRTIO_QNUM;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- /*
- * FIXME: VHOST_SET_VRING_CALL is the first per-vring message
- * we get, so we do vring queue pair allocation here.
- */
- if (cur_qp_idx + 1 > dev->virt_qp_nb) {
- if (alloc_vring_queue_pair(dev, cur_qp_idx) < 0)
- return -1;
- }
-
- /* file->index refers to the queue index. The txq is 1, rxq is 0. */
- vq = dev->virtqueue[file->index];
- assert(vq != NULL);
-
- if (vq->callfd >= 0)
- close(vq->callfd);
-
- vq->callfd = file->fd;
-
- return 0;
-}
-
-/*
- * Called from CUSE IOCTL: VHOST_SET_VRING_KICK
- * The virtio device sends an eventfd that it can use to notify us.
- * This fd gets copied into our process space.
- */
-int
-vhost_set_vring_kick(int vid, struct vhost_vring_file *file)
-{
- struct virtio_net *dev;
- struct vhost_virtqueue *vq;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- /* file->index refers to the queue index. The txq is 1, rxq is 0. */
- vq = dev->virtqueue[file->index];
-
- if (vq->kickfd >= 0)
- close(vq->kickfd);
-
- vq->kickfd = file->fd;
-
- return 0;
-}
-
-/*
- * Called from CUSE IOCTL: VHOST_NET_SET_BACKEND
- * To complete device initialisation when the virtio driver is loaded,
- * we are provided with a valid fd for a tap device (not used by us).
- * If this happens then we can add the device to a data core.
- * When the virtio driver is removed we get fd=-1.
- * At that point we remove the device from the data core.
- * The device will still exist in the device configuration linked list.
- */
-int
-vhost_set_backend(int vid, struct vhost_vring_file *file)
-{
- struct virtio_net *dev;
-
- dev = get_device(vid);
- if (dev == NULL)
- return -1;
-
- /* file->index refers to the queue index. The txq is 1, rxq is 0. */
- dev->virtqueue[file->index]->backend = file->fd;
-
- /*
- * If the device isn't already running and both backend fds are set,
- * we add the device.
- */
- if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
- if (dev->virtqueue[VIRTIO_TXQ]->backend != VIRTIO_DEV_STOPPED &&
- dev->virtqueue[VIRTIO_RXQ]->backend != VIRTIO_DEV_STOPPED) {
- if (notify_ops->new_device(vid) < 0)
- return -1;
- dev->flags |= VIRTIO_DEV_RUNNING;
- }
- } else if (file->fd == VIRTIO_DEV_STOPPED) {
- dev->flags &= ~VIRTIO_DEV_RUNNING;
- notify_ops->destroy_device(vid);
- }
-
- return 0;
-}
-
-int
-rte_vhost_get_numa_node(int vid)
-{
-#ifdef RTE_LIBRTE_VHOST_NUMA
- struct virtio_net *dev = get_device(vid);
- int numa_node;
- int ret;
-
- if (dev == NULL)
- return -1;
-
- ret = get_mempolicy(&numa_node, NULL, 0, dev,
- MPOL_F_NODE | MPOL_F_ADDR);
- if (ret < 0) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%d) failed to query numa node: %d\n", vid, ret);
- return -1;
- }
-
- return numa_node;
-#else
- RTE_SET_USED(vid);
- return -1;
-#endif
-}
-
-uint32_t
-rte_vhost_get_queue_num(int vid)
-{
- struct virtio_net *dev = get_device(vid);
-
- if (dev == NULL)
- return 0;
-
- return dev->virt_qp_nb;
-}
-
-int
-rte_vhost_get_ifname(int vid, char *buf, size_t len)
-{
- struct virtio_net *dev = get_device(vid);
-
- if (dev == NULL)
- return -1;
-
- len = RTE_MIN(len, sizeof(dev->ifname));
-
- strncpy(buf, dev->ifname, len);
- buf[len - 1] = '\0';
-
- return 0;
-}
-
-uint16_t
-rte_vhost_avail_entries(int vid, uint16_t queue_id)
-{
- struct virtio_net *dev;
- struct vhost_virtqueue *vq;
-
- dev = get_device(vid);
- if (!dev)
- return 0;
-
- vq = dev->virtqueue[queue_id];
- if (!vq->enabled)
- return 0;
-
- return *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx;
-}
-
-int
-rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable)
-{
- struct virtio_net *dev = get_device(vid);
-
- if (dev == NULL)
- return -1;
-
- if (enable) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "guest notification isn't supported.\n");
- return -1;
- }
-
- dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY;
- return 0;
-}
-
-uint64_t rte_vhost_feature_get(void)
-{
- return VHOST_FEATURES;
-}
-
-int rte_vhost_feature_disable(uint64_t feature_mask)
-{
- VHOST_FEATURES = VHOST_FEATURES & ~feature_mask;
- return 0;
-}
-
-int rte_vhost_feature_enable(uint64_t feature_mask)
-{
- if ((feature_mask & VHOST_SUPPORTED_FEATURES) == feature_mask) {
- VHOST_FEATURES = VHOST_FEATURES | feature_mask;
- return 0;
- }
- return -1;
-}
-
-/*
- * Register ops so that we can add/remove device to data core.
- */
-int
-rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const ops)
-{
- notify_ops = ops;
-
- return 0;
-}
Code Review / deb_dpdk.git / blobdiff