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authorXuan Zhuo <xuanzhuo@linux.alibaba.com>2022-08-01 14:38:32 +0800
committerMichael S. Tsirkin <mst@redhat.com>2022-08-11 04:06:39 -0400
commit198fa7be96e52bc89c9e8a7e1c3b9e059ff203a0 (patch)
tree76bce60b511a7e91e4270b063b76444bc9d0cd59 /drivers/virtio
parenta2b36c8d7ddbaff801bcaa4592522cd3b7b08112 (diff)
virtio_ring: split: extract the logic of vring init
Separate the logic of initializing vring, and subsequent patches will call it separately. This function completes the variable initialization of split vring. It together with the logic of atatch constitutes the initialization of vring. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-13-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio_ring.c31
1 files changed, 21 insertions, 10 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 03fc656b1f40..e456cc16ea2a 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -938,6 +938,25 @@ static void *virtqueue_detach_unused_buf_split(struct virtqueue *_vq)
return NULL;
}
+static void virtqueue_vring_init_split(struct vring_virtqueue_split *vring_split,
+ struct vring_virtqueue *vq)
+{
+ struct virtio_device *vdev;
+
+ vdev = vq->vq.vdev;
+
+ vring_split->avail_flags_shadow = 0;
+ vring_split->avail_idx_shadow = 0;
+
+ /* No callback? Tell other side not to bother us. */
+ if (!vq->vq.callback) {
+ vring_split->avail_flags_shadow |= VRING_AVAIL_F_NO_INTERRUPT;
+ if (!vq->event)
+ vring_split->vring.avail->flags = cpu_to_virtio16(vdev,
+ vring_split->avail_flags_shadow);
+ }
+}
+
static int vring_alloc_state_extra_split(struct vring_virtqueue_split *vring_split)
{
struct vring_desc_state_split *state;
@@ -2302,16 +2321,6 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
vq->split.queue_size_in_bytes = 0;
vq->split.vring = vring_split->vring;
- vq->split.avail_flags_shadow = 0;
- vq->split.avail_idx_shadow = 0;
-
- /* No callback? Tell other side not to bother us. */
- if (!callback) {
- vq->split.avail_flags_shadow |= VRING_AVAIL_F_NO_INTERRUPT;
- if (!vq->event)
- vq->split.vring.avail->flags = cpu_to_virtio16(vdev,
- vq->split.avail_flags_shadow);
- }
err = vring_alloc_state_extra_split(vring_split);
if (err) {
@@ -2325,6 +2334,8 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
vq->split.desc_state = vring_split->desc_state;
vq->split.desc_extra = vring_split->desc_extra;
+ virtqueue_vring_init_split(vring_split, vq);
+
virtqueue_init(vq, vring_split->vring.num);
spin_lock(&vdev->vqs_list_lock);