Re: [PATCH v12 26/40] virtio_ring: struct virtqueue introduce reset

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在 2022/7/20 11:04, Xuan Zhuo 写道:
Introduce a new member reset to the structure virtqueue to determine
whether the current vq is in the reset state. Subsequent patches will
use it.

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


Acked-by: Jason Wang <jasowang@xxxxxxxxxx>


---
  drivers/virtio/virtio_ring.c | 2 ++
  include/linux/virtio.h       | 2 ++
  2 files changed, 4 insertions(+)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index bf666dad9904..8278b917ad64 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -2011,6 +2011,7 @@ static struct virtqueue *vring_create_virtqueue_packed(
  	vq->vq.vdev = vdev;
  	vq->vq.name = name;
  	vq->vq.index = index;
+	vq->vq.reset = false;
  	vq->we_own_ring = true;
  	vq->notify = notify;
  	vq->weak_barriers = weak_barriers;
@@ -2490,6 +2491,7 @@ struct virtqueue *__vring_new_virtqueue(unsigned int index,
  	vq->vq.vdev = vdev;
  	vq->vq.name = name;
  	vq->vq.index = index;
+	vq->vq.reset = false;
  	vq->we_own_ring = false;
  	vq->notify = notify;
  	vq->weak_barriers = weak_barriers;
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index d45ee82a4470..a3f73bb6733e 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -20,6 +20,7 @@
   * @index: the zero-based ordinal number for this queue.
   * @num_free: number of elements we expect to be able to fit.
   * @num_max: the maximum number of elements supported by the device.
+ * @reset: vq is in reset state or not.
   *
   * A note on @num_free: with indirect buffers, each buffer needs one
   * element in the queue, otherwise a buffer will need one element per
@@ -34,6 +35,7 @@ struct virtqueue {
  	unsigned int num_free;
  	unsigned int num_max;
  	void *priv;
+	bool reset;
  };
int virtqueue_add_outbuf(struct virtqueue *vq,




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