diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2012-04-06 10:38:37 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2012-04-19 10:31:05 +0200 |
| commit | c80decdbd9ea679a17f6b0202ea1df0f840e4828 (patch) | |
| tree | ed5069b043ef7cb003ff400a45a1347e7d85302f | |
| parent | fcf104a74cb8d6d39dc935ab692afface3beab30 (diff) | |
virtio: add virtio_queue_get_id
Serializing virtio-scsi requests needs a simple way to get from a
VirtQueue to the number of the queue. The virtio_queue_get_id
provides this.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | hw/virtio.c | 7 | ||||
| -rw-r--r-- | hw/virtio.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/hw/virtio.c b/hw/virtio.c index 064aecf553..314abf8a18 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -624,6 +624,13 @@ int virtio_queue_get_num(VirtIODevice *vdev, int n) return vdev->vq[n].vring.num; } +int virtio_queue_get_id(VirtQueue *vq) +{ + VirtIODevice *vdev = vq->vdev; + assert(vq >= &vdev->vq[0] && vq < &vdev->vq[VIRTIO_PCI_QUEUE_MAX]); + return vq - &vdev->vq[0]; +} + void virtio_queue_notify_vq(VirtQueue *vq) { if (vq->vring.desc) { diff --git a/hw/virtio.h b/hw/virtio.h index 400c092c95..0aef7d1bc0 100644 --- a/hw/virtio.h +++ b/hw/virtio.h @@ -229,6 +229,7 @@ target_phys_addr_t virtio_queue_get_ring_size(VirtIODevice *vdev, int n); uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n); void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx); VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n); +int virtio_queue_get_id(VirtQueue *vq); EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq); EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq); void virtio_queue_notify_vq(VirtQueue *vq); |