Re: [PATCH v4 1/4] vdpa: Add stop operation

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On Thu, May 26, 2022 at 02:43:35PM +0200, Eugenio Pérez wrote:
This operation is optional: It it's not implemented, backend feature bit
will not be exposed.

Signed-off-by: Eugenio Pérez <eperezma@xxxxxxxxxx>
---
include/linux/vdpa.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 15af802d41c4..ddfebc4e1e01 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -215,6 +215,11 @@ struct vdpa_map_file {
 * @reset:			Reset device
 *				@vdev: vdpa device
 *				Returns integer: success (0) or error (< 0)
+ * @stop:			Stop or resume the device (optional, but it must
+ *				be implemented if require device stop)
+ *				@vdev: vdpa device
+ *				@stop: stop (true), not stop (false)

Sorry for just seeing this now, but if you have to send a v5, maybe we could use "resume" here instead of "not stop".

Thanks,
Stefano

+ *				Returns integer: success (0) or error (< 0)
 * @get_config_size:		Get the size of the configuration space includes
 *				fields that are conditional on feature bits.
 *				@vdev: vdpa device
@@ -316,6 +321,7 @@ struct vdpa_config_ops {
	u8 (*get_status)(struct vdpa_device *vdev);
	void (*set_status)(struct vdpa_device *vdev, u8 status);
	int (*reset)(struct vdpa_device *vdev);
+	int (*stop)(struct vdpa_device *vdev, bool stop);
	size_t (*get_config_size)(struct vdpa_device *vdev);
	void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
			   void *buf, unsigned int len);
--
2.31.1


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