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Commit 9372e6fe authored by Alex Williamson's avatar Alex Williamson
Browse files

vfio-mdev: Make mdev_parent private 



Rather than hoping for good behavior by marking some elements
internal, enforce it by making the entire structure private and
creating an accessor function for the one useful external field.

Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Jike Song <jike.song@intel.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Reviewed by: Kirti Wankhede <kwankhede@nvidia.com>
parent 42930553

Documentation/vfio-mediated-device.txt

+3 −0
Original line number Diff line number Diff line
@@ -223,6 +223,9 @@ Directories and files under the sysfs for Each Physical Device 


	sprintf(buf, "%s-%s", dev_driver_string(parent->dev), group->name);



  (or using mdev_parent_dev(mdev) to arrive at the parent device outside

   of the core mdev code)



* device_api



  This attribute should show which device API is being created, for example,

drivers/gpu/drm/i915/gvt/kvmgt.c

+1 −1
Original line number Diff line number Diff line
@@ -396,7 +396,7 @@ static int intel_vgpu_create(struct kobject *kobj, struct mdev_device *mdev) 
	struct device *pdev;

	void *gvt;



	pdev = mdev->parent->dev;

	pdev = mdev_parent_dev(mdev);

	gvt = kdev_to_i915(pdev)->gvt;



	type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));

drivers/vfio/mdev/mdev_core.c

+6 −0
Original line number Diff line number Diff line
@@ -30,6 +30,12 @@ static struct class_compat *mdev_bus_compat_class; 
static LIST_HEAD(mdev_list);

static DEFINE_MUTEX(mdev_list_lock);



struct device *mdev_parent_dev(struct mdev_device *mdev)

{

	return mdev->parent->dev;

}

EXPORT_SYMBOL(mdev_parent_dev);



static int _find_mdev_device(struct device *dev, void *data)

{

	struct mdev_device *mdev;

drivers/vfio/mdev/mdev_private.h

+10 −0
Original line number Diff line number Diff line
@@ -16,6 +16,16 @@ 
int  mdev_bus_register(void);

void mdev_bus_unregister(void);



struct mdev_parent {

	struct device *dev;

	const struct mdev_parent_ops *ops;

	struct kref ref;

	struct mutex lock;

	struct list_head next;

	struct kset *mdev_types_kset;

	struct list_head type_list;

};



struct mdev_type {

	struct kobject kobj;

	struct kobject *devices_kobj;

include/linux/mdev.h

+2 −13
Original line number Diff line number Diff line
@@ -13,19 +13,6 @@ 
#ifndef MDEV_H

#define MDEV_H



/* Parent device */

struct mdev_parent {

	struct device			*dev;

	const struct mdev_parent_ops	*ops;



	/* internal */

	struct kref		ref;

	struct mutex		lock;

	struct list_head	next;

	struct kset		*mdev_types_kset;

	struct list_head	type_list;

};



/* Mediated device */

struct mdev_device {

	struct device		dev;
@@ -165,4 +152,6 @@ extern void mdev_unregister_device(struct device *dev); 
extern int  mdev_register_driver(struct mdev_driver *drv, struct module *owner);

extern void mdev_unregister_driver(struct mdev_driver *drv);



extern struct device *mdev_parent_dev(struct mdev_device *mdev);



#endif /* MDEV_H */