Commit 20d27324 authored by Sebastien Boeuf's avatar Sebastien Boeuf Committed by jiangdongxu
Browse files

vdpa: Add resume operation 

mainline inclusion
from mainline-v6.3-rc1
commit 1538a8a4
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I86ITO
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1538a8a49ecbe6d3302cd7f347632338e56857f8



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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: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarSebastien Boeuf <sebastien.boeuf@intel.com>
Message-Id: <6e05c4b31b47f3e29cb2bd7ebd56c81f84b8f48a.1672742878.git.sebastien.boeuf@intel.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Signed-off-by: default avatarjiangdongxu <jiangdongxu1@huawei.com>
parent f78294ea

include/linux/vdpa.h

+5 −1
Original line number Diff line number Diff line
@@ -216,7 +216,10 @@ 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
@@ -321,6 +324,7 @@ 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);