Commit 8ad176aa authored by Jason Wang's avatar Jason Wang Committed by Michael S. Tsirkin
Browse files

virtio: introduce virtio_get_num_queues() 



This patch introduces virtio_get_num_queues() which iterates the vqs
array and return the number of virtqueues used by device.

Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent e8398045

hw/virtio/virtio.c

+13 −0
Original line number Diff line number Diff line
@@ -746,6 +746,19 @@ int virtio_queue_get_num(VirtIODevice *vdev, int n) 
    return vdev->vq[n].vring.num;

}



int virtio_get_num_queues(VirtIODevice *vdev)

{

    int i;



    for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {

        if (!virtio_queue_get_num(vdev, i)) {

            break;

        }

    }



    return i;

}



int virtio_queue_get_id(VirtQueue *vq)

{

    VirtIODevice *vdev = vq->vdev;

include/hw/virtio/virtio.h

+1 −0
Original line number Diff line number Diff line
@@ -176,6 +176,7 @@ void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr); 
hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n);

void virtio_queue_set_num(VirtIODevice *vdev, int n, int num);

int virtio_queue_get_num(VirtIODevice *vdev, int n);

int virtio_get_num_queues(VirtIODevice *vdev);

void virtio_queue_set_align(VirtIODevice *vdev, int n, int align);

void virtio_queue_notify(VirtIODevice *vdev, int n);

uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);