From 903f7bcaedb84ca47998e609015a34ddde93742e Mon Sep 17 00:00:00 2001
From: Parav Pandit <parav@nvidia.com>
Date: Tue, 5 Jan 2021 12:32:01 +0200
Subject: vdpa: Enable a user to add and delete a vdpa device

Add the ability to add and delete a vdpa device.

Examples:
Create a vdpa device of type network named "foo2" from
the management device vdpasim:

$ vdpa dev add mgmtdev vdpasim_net name foo2

Delete the vdpa device after its use:
$ vdpa dev del foo2

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210105103203.82508-5-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/linux/vdpa.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'include/linux/vdpa.h')

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 6b8b4222bca6..4ab5494503a8 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -45,6 +45,8 @@ struct vdpa_mgmt_dev;
  * @index: device index
  * @features_valid: were features initialized? for legacy guests
  * @nvqs: maximum number of supported virtqueues
+ * @mdev: management device pointer; caller must setup when registering device as part
+ *	  of dev_add() mgmtdev ops callback before invoking _vdpa_register_device().
  */
 struct vdpa_device {
 	struct device dev;
@@ -53,6 +55,7 @@ struct vdpa_device {
 	unsigned int index;
 	bool features_valid;
 	int nvqs;
+	struct vdpa_mgmt_dev *mdev;
 };
 
 /**
@@ -260,6 +263,9 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
 int vdpa_register_device(struct vdpa_device *vdev);
 void vdpa_unregister_device(struct vdpa_device *vdev);
 
+int _vdpa_register_device(struct vdpa_device *vdev);
+void _vdpa_unregister_device(struct vdpa_device *vdev);
+
 /**
  * vdpa_driver - operations for a vDPA driver
  * @driver: underlying device driver
-- 
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