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https://github.com/projectacrn/acrn-hypervisor.git
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dm: virtio: implement vhost_vq interfaces
vhost_vq related interfaces are implemented in this patch. They are vhost_vq_init/vhost_vq_deinit/vhost_vq_start/vhost_vq_stop. Tracked-On: #1329 Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com> Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Jian Jun Chen
lijinxia
parent
bb34ffe672
commit
befbc3e924
@ -44,6 +44,54 @@ vhost_kernel_deinit(struct vhost_dev *vdev)
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/* to be implemented */
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}
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static int
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vhost_kernel_set_vring_addr(struct vhost_dev *vdev,
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struct vhost_vring_addr *addr)
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{
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/* to be implemented */
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return -1;
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}
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static int
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vhost_kernel_set_vring_num(struct vhost_dev *vdev,
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struct vhost_vring_state *ring)
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{
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/* to be implemented */
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return -1;
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}
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static int
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vhost_kernel_set_vring_base(struct vhost_dev *vdev,
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struct vhost_vring_state *ring)
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{
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/* to be implemented */
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return -1;
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}
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static int
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vhost_kernel_get_vring_base(struct vhost_dev *vdev,
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struct vhost_vring_state *ring)
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{
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/* to be implemented */
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return -1;
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}
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static int
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vhost_kernel_set_vring_kick(struct vhost_dev *vdev,
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struct vhost_vring_file *file)
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{
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/* to be implemented */
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return -1;
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}
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static int
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vhost_kernel_set_vring_call(struct vhost_dev *vdev,
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struct vhost_vring_file *file)
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{
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/* to be implemented */
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return -1;
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}
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static int
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vhost_kernel_set_vring_busyloop_timeout(struct vhost_dev *vdev,
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struct vhost_vring_state *s)
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@ -91,31 +139,232 @@ vhost_kernel_net_set_backend(struct vhost_dev *vdev,
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}
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static int
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vhost_vq_init(struct vhost_dev *vdev, int idx)
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vhost_eventfd_test_and_clear(int fd)
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{
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/* to be implemented */
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return -1;
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}
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static int
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vhost_vq_register_eventfd(struct vhost_dev *vdev,
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int idx, bool is_register)
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{
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/* to be implemented */
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return -1;
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}
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static int
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vhost_vq_init(struct vhost_dev *vdev, int idx)
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{
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struct vhost_vq *vq;
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if (!vdev || !vdev->vqs)
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goto fail;
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vq = &vdev->vqs[idx];
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if (!vq)
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goto fail;
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vq->kick_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
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if (vq->kick_fd < 0) {
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WPRINTF("create kick_fd failed\n");
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goto fail_kick;
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}
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vq->call_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
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if (vq->call_fd < 0) {
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WPRINTF("create call_fd failed\n");
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goto fail_call;
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}
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vq->idx = idx;
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vq->dev = vdev;
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return 0;
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fail_call:
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close(vq->kick_fd);
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fail_kick:
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vq->kick_fd = -1;
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vq->call_fd = -1;
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fail:
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return -1;
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}
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static int
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vhost_vq_deinit(struct vhost_vq *vq)
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{
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/* to be implemented */
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return -1;
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if (!vq)
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return -1;
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if (vq->call_fd > 0) {
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close(vq->call_fd);
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vq->call_fd = -1;
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}
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if (vq->kick_fd > 0) {
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close(vq->kick_fd);
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vq->kick_fd = -1;
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}
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return 0;
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}
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static int
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vhost_vq_start(struct vhost_dev *vdev, int idx)
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{
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/* to be implemented */
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struct vhost_vq *vq;
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struct virtio_vq_info *vqi;
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struct vhost_vring_state ring;
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struct vhost_vring_addr addr;
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struct vhost_vring_file file;
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int rc, q_idx;
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/* sanity check */
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if (!vdev->base || !vdev->base->queues || !vdev->base->vops ||
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!vdev->vqs) {
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WPRINTF("vhost_dev is not initialized\n");
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goto fail;
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}
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/*
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* vq_idx is introduced to support multi-queue feature of vhost net.
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* When multi-queue feature is enabled, every vhost_dev owns part of
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* the virtqueues defined by virtio backend driver in device model,
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* they are specified by
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* [vdev->vq_idx, vdev->vq_idx + vhost_dev->nvqs)
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* If multi-queue feature is not required, just leave vdev->vq_idx
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* to zero.
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*/
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q_idx = idx + vdev->vq_idx;
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if (q_idx >= vdev->base->vops->nvq) {
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WPRINTF("invalid vq index: idx = %d, vq_idx = %d\n",
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idx, vdev->vq_idx);
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goto fail;
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}
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vqi = &vdev->base->queues[q_idx];
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vq = &vdev->vqs[idx];
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/* clear kick_fd and call_fd */
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vhost_eventfd_test_and_clear(vq->kick_fd);
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vhost_eventfd_test_and_clear(vq->call_fd);
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/* register ioeventfd & irqfd */
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rc = vhost_vq_register_eventfd(vdev, idx, true);
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if (rc < 0) {
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WPRINTF("register eventfd failed: idx = %d\n", idx);
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goto fail;
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}
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/* VHOST_SET_VRING_NUM */
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ring.index = idx;
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ring.num = vqi->qsize;
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rc = vhost_kernel_set_vring_num(vdev, &ring);
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if (rc < 0) {
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WPRINTF("set_vring_num failed: idx = %d\n", idx);
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goto fail_vring;
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}
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/* VHOST_SET_VRING_BASE */
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ring.num = vqi->last_avail;
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rc = vhost_kernel_set_vring_base(vdev, &ring);
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if (rc < 0) {
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WPRINTF("set_vring_base failed: idx = %d, last_avail = %d\n",
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idx, vqi->last_avail);
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goto fail_vring;
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}
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/* VHOST_SET_VRING_ADDR */
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addr.index = idx;
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addr.desc_user_addr = (uintptr_t)vqi->desc;
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addr.avail_user_addr = (uintptr_t)vqi->avail;
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addr.used_user_addr = (uintptr_t)vqi->used;
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addr.log_guest_addr = (uintptr_t)NULL;
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addr.flags = 0;
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rc = vhost_kernel_set_vring_addr(vdev, &addr);
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if (rc < 0) {
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WPRINTF("set_vring_addr failed: idx = %d\n", idx);
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goto fail_vring;
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}
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/* VHOST_SET_VRING_CALL */
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file.index = idx;
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file.fd = vq->call_fd;
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rc = vhost_kernel_set_vring_call(vdev, &file);
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if (rc < 0) {
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WPRINTF("set_vring_call failed\n");
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goto fail_vring;
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}
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/* VHOST_SET_VRING_KICK */
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file.index = idx;
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file.fd = vq->kick_fd;
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rc = vhost_kernel_set_vring_kick(vdev, &file);
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if (rc < 0) {
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WPRINTF("set_vring_kick failed: idx = %d", idx);
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goto fail_vring_kick;
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}
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return 0;
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fail_vring_kick:
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file.index = idx;
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file.fd = -1;
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vhost_kernel_set_vring_call(vdev, &file);
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fail_vring:
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vhost_vq_register_eventfd(vdev, idx, false);
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fail:
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return -1;
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}
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static int
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vhost_vq_stop(struct vhost_dev *vdev, int idx)
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{
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/* to be implemented */
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return -1;
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struct virtio_vq_info *vqi;
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struct vhost_vring_file file;
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struct vhost_vring_state ring;
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int rc, q_idx;
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/* sanity check */
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if (!vdev->base || !vdev->base->queues || !vdev->base->vops ||
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!vdev->vqs) {
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WPRINTF("vhost_dev is not initialized\n");
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return -1;
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}
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q_idx = idx + vdev->vq_idx;
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if (q_idx >= vdev->base->vops->nvq) {
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WPRINTF("invalid vq index: idx = %d, vq_idx = %d\n",
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idx, vdev->vq_idx);
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return -1;
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}
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vqi = &vdev->base->queues[q_idx];
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file.index = idx;
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file.fd = -1;
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/* VHOST_SET_VRING_KICK */
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vhost_kernel_set_vring_kick(vdev, &file);
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/* VHOST_SET_VRING_CALL */
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vhost_kernel_set_vring_call(vdev, &file);
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/* VHOST_GET_VRING_BASE */
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ring.index = idx;
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rc = vhost_kernel_get_vring_base(vdev, &ring);
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if (rc < 0)
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WPRINTF("get_vring_base failed: idx = %d", idx);
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else
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vqi->last_avail = ring.num;
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/* update vqi->save_used */
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vqi->save_used = vqi->used->idx;
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/* unregister ioeventfd & irqfd */
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rc = vhost_vq_register_eventfd(vdev, idx, false);
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if (rc < 0)
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WPRINTF("unregister eventfd failed: idx = %d\n", idx);
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return rc;
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}
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static int
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