Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e086497d authored by Eric Auger's avatar Eric Auger Committed by Alex Williamson
Browse files

vfio: platform: add capability to register a reset function 



In preparation for subsequent changes in reset function lookup,
lets introduce a dynamic list of reset combos (compat string,
reset module, reset function). The list can be populated/voided with
vfio_platform_register/unregister_reset. Those are not yet used in
this patch.

Signed-off-by: default avatarEric Auger <eric.auger@linaro.org>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 32a2d71c

drivers/vfio/platform/vfio_platform_common.c

+27 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#define DRIVER_AUTHOR   "Antonios Motakis <a.motakis@virtualopensystems.com>"

#define DRIVER_DESC     "VFIO platform base module"



static LIST_HEAD(reset_list);

static DEFINE_MUTEX(driver_lock);



static const struct vfio_platform_reset_combo reset_lookup_table[] = {
@@ -578,6 +579,32 @@ struct vfio_platform_device *vfio_platform_remove_common(struct device *dev) 
}

EXPORT_SYMBOL_GPL(vfio_platform_remove_common);



void __vfio_platform_register_reset(struct vfio_platform_reset_node *node)

{

	mutex_lock(&driver_lock);

	list_add(&node->link, &reset_list);

	mutex_unlock(&driver_lock);

}

EXPORT_SYMBOL_GPL(__vfio_platform_register_reset);



void vfio_platform_unregister_reset(const char *compat,

				    vfio_platform_reset_fn_t fn)

{

	struct vfio_platform_reset_node *iter, *temp;



	mutex_lock(&driver_lock);

	list_for_each_entry_safe(iter, temp, &reset_list, link) {

		if (!strcmp(iter->compat, compat) && (iter->reset == fn)) {

			list_del(&iter->link);

			break;

		}

	}



	mutex_unlock(&driver_lock);



}

EXPORT_SYMBOL_GPL(vfio_platform_unregister_reset);



MODULE_VERSION(DRIVER_VERSION);

MODULE_LICENSE("GPL v2");

MODULE_AUTHOR(DRIVER_AUTHOR);

drivers/vfio/platform/vfio_platform_private.h

+20 −0
Original line number Diff line number Diff line
@@ -71,6 +71,15 @@ struct vfio_platform_device { 
	int	(*reset)(struct vfio_platform_device *vdev);

};



typedef int (*vfio_platform_reset_fn_t)(struct vfio_platform_device *vdev);



struct vfio_platform_reset_node {

	struct list_head link;

	char *compat;

	struct module *owner;

	vfio_platform_reset_fn_t reset;

};



struct vfio_platform_reset_combo {

	const char *compat;

	const char *reset_function_name;
@@ -90,4 +99,15 @@ extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev, 
					unsigned start, unsigned count,

					void *data);



extern void __vfio_platform_register_reset(struct vfio_platform_reset_node *n);

extern void vfio_platform_unregister_reset(const char *compat,

					   vfio_platform_reset_fn_t fn);

#define vfio_platform_register_reset(__compat, __reset)		\

static struct vfio_platform_reset_node __reset ## _node = {	\

	.owner = THIS_MODULE,					\

	.compat = __compat,					\

	.reset = __reset,					\

};								\

__vfio_platform_register_reset(&__reset ## _node)



#endif /* VFIO_PLATFORM_PRIVATE_H */