@@ -1922,6 +1922,22 @@ static void virtqueue_vring_attach_packed(struct vring_virtqueue *vq,
vq->packed.desc_extra = vring->desc_extra;
}
+static void virtqueue_vring_init_packed(struct vring_virtqueue *vq)
+{
+ vq->packed.next_avail_idx = 0;
+ vq->packed.avail_wrap_counter = 1;
+ vq->packed.used_wrap_counter = 1;
+ vq->packed.event_flags_shadow = 0;
+ vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL;
+
+ /* No callback? Tell other side not to bother us. */
+ if (!vq->vq.callback) {
+ vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE;
+ vq->packed.vring.driver->flags =
+ cpu_to_le16(vq->packed.event_flags_shadow);
+ }
+}
+
static struct virtqueue *vring_create_virtqueue_packed(
unsigned int index,
unsigned int num,
@@ -1958,25 +1974,13 @@ static struct virtqueue *vring_create_virtqueue_packed(
vq->indirect = virtio_has_feature(vdev, VIRTIO_RING_F_INDIRECT_DESC) &&
!context;
- vq->packed.next_avail_idx = 0;
- vq->packed.avail_wrap_counter = 1;
- vq->packed.used_wrap_counter = 1;
- vq->packed.event_flags_shadow = 0;
- vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL;
-
err = vring_alloc_state_extra_packed(&vring);
if (err)
goto err_state_extra;
virtqueue_init(vq, num);
virtqueue_vring_attach_packed(vq, &vring);
-
- /* No callback? Tell other side not to bother us. */
- if (!callback) {
- vq->packed.event_flags_shadow = VRING_PACKED_EVENT_FLAG_DISABLE;
- vq->packed.vring.driver->flags =
- cpu_to_le16(vq->packed.event_flags_shadow);
- }
+ virtqueue_vring_init_packed(vq);
spin_lock(&vdev->vqs_list_lock);
list_add_tail(&vq->vq.list, &vdev->vqs);
Separate the logic of initializing vring, and subsequent patches will call it separately. This function completes the variable initialization of packed vring. It together with the logic of atatch constitutes the initialization of vring. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/virtio/virtio_ring.c | 30 +++++++++++++++++------------- 1 file changed, 17 insertions(+), 13 deletions(-)