From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Add a new operation to allow a vDPA device to be resumed after it has
been suspended. Trying to resume a device that wasn't suspended will
result in a no-op.

This operation is optional. If it's not implemented, the associated
backend feature bit will not be exposed. And if the feature bit is not
exposed, invoking this operation will return an error.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 include/linux/vdpa.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 6d0f5e4e82c2..96d308cbf97b 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -219,7 +219,10 @@ struct vdpa_map_file {
  * @reset:			Reset device
  *				@vdev: vdpa device
  *				Returns integer: success (0) or error (< 0)
- * @suspend:			Suspend or resume the device (optional)
+ * @suspend:			Suspend the device (optional)
+ *				@vdev: vdpa device
+ *				Returns integer: success (0) or error (< 0)
+ * @resume:			Resume the device (optional)
  *				@vdev: vdpa device
  *				Returns integer: success (0) or error (< 0)
  * @get_config_size:		Get the size of the configuration space includes
@@ -324,6 +327,7 @@ struct vdpa_config_ops {
 	void (*set_status)(struct vdpa_device *vdev, u8 status);
 	int (*reset)(struct vdpa_device *vdev);
 	int (*suspend)(struct vdpa_device *vdev);
+	int (*resume)(struct vdpa_device *vdev);
 	size_t (*get_config_size)(struct vdpa_device *vdev);
 	void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
 			   void *buf, unsigned int len);
-- 
2.37.2

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On Tue, Jan 03, 2023 at 11:51:05AM +0100, sebastien.boeuf@intel.com wrote:
>From: Sebastien Boeuf <sebastien.boeuf@intel.com>
>
>Add a new operation to allow a vDPA device to be resumed after it has
>been suspended. Trying to resume a device that wasn't suspended will
>result in a no-op.
>
>This operation is optional. If it's not implemented, the associated
>backend feature bit will not be exposed. And if the feature bit is not
>exposed, invoking this operation will return an error.
>
>Acked-by: Jason Wang <jasowang@redhat.com>
>Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
>---
> include/linux/vdpa.h | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

>
>diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
>index 6d0f5e4e82c2..96d308cbf97b 100644
>--- a/include/linux/vdpa.h
>+++ b/include/linux/vdpa.h
>@@ -219,7 +219,10 @@ struct vdpa_map_file {
>  * @reset:			Reset device
>  *				@vdev: vdpa device
>  *				Returns integer: success (0) or error (< 0)
>- * @suspend:			Suspend or resume the device (optional)
>+ * @suspend:			Suspend the device (optional)
>+ *				@vdev: vdpa device
>+ *				Returns integer: success (0) or error (< 0)
>+ * @resume:			Resume the device (optional)
>  *				@vdev: vdpa device
>  *				Returns integer: success (0) or error (< 0)
>  * @get_config_size:		Get the size of the configuration space includes
>@@ -324,6 +327,7 @@ struct vdpa_config_ops {
> 	void (*set_status)(struct vdpa_device *vdev, u8 status);
> 	int (*reset)(struct vdpa_device *vdev);
> 	int (*suspend)(struct vdpa_device *vdev);
>+	int (*resume)(struct vdpa_device *vdev);
> 	size_t (*get_config_size)(struct vdpa_device *vdev);
> 	void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
> 			   void *buf, unsigned int len);
>-- 
>2.37.2
>
>---------------------------------------------------------------------
>Intel Corporation SAS (French simplified joint stock company)
>Registered headquarters: "Les Montalets"- 2, rue de Paris,
>92196 Meudon Cedex, France
>Registration Number:  302 456 199 R.C.S. NANTERRE
>Capital: 5 208 026.16 Euros
>
>This e-mail and any attachments may contain confidential material for
>the sole use of the intended recipient(s). Any review or distribution
>by others is strictly prohibited. If you are not the intended
>recipient, please contact the sender and delete all copies.
>