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virtio_ring: split: extract the logic of attach vring

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Separate the logic of attach vring, subsequent patches will call it
separately.

virtqueue_vring_init_split() completes the initialization of other
variables of vring split. We can directly use
vq->split = *vring_split to complete attach.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-14-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xuan Zhuo 2022-08-01 14:38:33 +08:00 committed by Michael S. Tsirkin
parent 198fa7be96
commit e1d6a423ea
1 changed files with 10 additions and 13 deletions
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23
drivers/virtio/virtio_ring.c
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@ -957,6 +957,15 @@ static void virtqueue_vring_init_split(struct vring_virtqueue_split *vring_split
}
}
static void virtqueue_vring_attach_split(struct vring_virtqueue *vq,
struct vring_virtqueue_split *vring_split)
{
vq->split = *vring_split;
/* Put everything in free lists. */
vq->free_head = 0;
}
static int vring_alloc_state_extra_split(struct vring_virtqueue_split *vring_split)
{
struct vring_desc_state_split *state;
@ -1067,8 +1076,6 @@ static struct virtqueue *vring_create_virtqueue_split(
return NULL;
}
to_vvq(vq)->split.queue_dma_addr = vring_split.queue_dma_addr;
to_vvq(vq)->split.queue_size_in_bytes = vring_split.queue_size_in_bytes;
to_vvq(vq)->we_own_ring = true;
return vq;
@ -2317,26 +2324,16 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
if (virtio_has_feature(vdev, VIRTIO_F_ORDER_PLATFORM))
vq->weak_barriers = false;
vq->split.queue_dma_addr = 0;
vq->split.queue_size_in_bytes = 0;
vq->split.vring = vring_split->vring;
err = vring_alloc_state_extra_split(vring_split);
if (err) {
kfree(vq);
return NULL;
}
/* Put everything in free lists. */
vq->free_head = 0;
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);
virtqueue_vring_attach_split(vq, vring_split);
spin_lock(&vdev->vqs_list_lock);
list_add_tail(&vq->vq.list, &vdev->vqs);