Re: [PATCH v13 08/42] virtio_ring: split: __vring_new_virtqueue() accept struct vring_virtqueue_split

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在 2022/7/26 15:21, Xuan Zhuo 写道:
__vring_new_virtqueue() instead accepts struct vring_virtqueue_split.

The purpose of this is to pass more information into
__vring_new_virtqueue() to make the code simpler and the structure
cleaner.

Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>


Acked-by: Jason Wang <jasowang@xxxxxxxxxx>


---
  drivers/virtio/virtio_ring.c | 29 +++++++++++++++--------------
  1 file changed, 15 insertions(+), 14 deletions(-)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 4e54ed7ee7fb..4d65c437d968 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -205,7 +205,7 @@ struct vring_virtqueue {
  };
static struct virtqueue *__vring_new_virtqueue(unsigned int index,
-					       struct vring vring,
+					       struct vring_virtqueue_split *vring_split,
  					       struct virtio_device *vdev,
  					       bool weak_barriers,
  					       bool context,
@@ -959,6 +959,7 @@ static struct virtqueue *vring_create_virtqueue_split(
  	void (*callback)(struct virtqueue *),
  	const char *name)
  {
+	struct vring_virtqueue_split vring_split = {};
  	struct virtqueue *vq;
  	void *queue = NULL;
  	dma_addr_t dma_addr;
@@ -994,10 +995,10 @@ static struct virtqueue *vring_create_virtqueue_split(
  		return NULL;
queue_size_in_bytes = vring_size(num, vring_align);
-	vring_init(&vring, num, queue, vring_align);
+	vring_init(&vring_split.vring, num, queue, vring_align);
- vq = __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
-				   notify, callback, name);
+	vq = __vring_new_virtqueue(index, &vring_split, vdev, weak_barriers,
+				   context, notify, callback, name);
  	if (!vq) {
  		vring_free_queue(vdev, queue_size_in_bytes, queue,
  				 dma_addr);
@@ -2206,7 +2207,7 @@ EXPORT_SYMBOL_GPL(vring_interrupt);
/* Only available for split ring */
  static struct virtqueue *__vring_new_virtqueue(unsigned int index,
-					       struct vring vring,
+					       struct vring_virtqueue_split *vring_split,
  					       struct virtio_device *vdev,
  					       bool weak_barriers,
  					       bool context,
@@ -2243,7 +2244,7 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
  	vq->split.queue_dma_addr = 0;
  	vq->split.queue_size_in_bytes = 0;
- vq->split.vring = vring;
+	vq->split.vring = vring_split->vring;
  	vq->split.avail_flags_shadow = 0;
  	vq->split.avail_idx_shadow = 0;
@@ -2255,19 +2256,19 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
  					vq->split.avail_flags_shadow);
  	}
- vq->split.desc_state = kmalloc_array(vring.num,
+	vq->split.desc_state = kmalloc_array(vring_split->vring.num,
  			sizeof(struct vring_desc_state_split), GFP_KERNEL);
  	if (!vq->split.desc_state)
  		goto err_state;
- vq->split.desc_extra = vring_alloc_desc_extra(vring.num);
+	vq->split.desc_extra = vring_alloc_desc_extra(vring_split->vring.num);
  	if (!vq->split.desc_extra)
  		goto err_extra;
- memset(vq->split.desc_state, 0, vring.num *
+	memset(vq->split.desc_state, 0, vring_split->vring.num *
  			sizeof(struct vring_desc_state_split));
- virtqueue_init(vq, vq->split.vring.num);
+	virtqueue_init(vq, vring_split->vring.num);
spin_lock(&vdev->vqs_list_lock);
  	list_add_tail(&vq->vq.list, &vdev->vqs);
@@ -2317,14 +2318,14 @@ struct virtqueue *vring_new_virtqueue(unsigned int index,
  				      void (*callback)(struct virtqueue *vq),
  				      const char *name)
  {
-	struct vring vring;
+	struct vring_virtqueue_split vring_split = {};
if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED))
  		return NULL;
- vring_init(&vring, num, pages, vring_align);
-	return __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
-				     notify, callback, name);
+	vring_init(&vring_split.vring, num, pages, vring_align);
+	return __vring_new_virtqueue(index, &vring_split, vdev, weak_barriers,
+				     context, notify, callback, name);
  }
  EXPORT_SYMBOL_GPL(vring_new_virtqueue);




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