[PATCH v14 13/42] virtio_ring: split: extract the logic of attach vring
From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: 2022-08-01 06:40:49
Also in:
bpf, kvm, linux-remoteproc, linux-s390, linux-um, platform-driver-x86, virtualization
Subsystem:
the rest, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
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> --- drivers/virtio/virtio_ring.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index e456cc16ea2a..d0df887c3ada 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c@@ -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);
--
2.31.0