include/drm/drm_auth.h

Source file repositories/reference/linux-study-clean/include/drm/drm_auth.h

File Facts

System
Linux kernel
Corpus path
include/drm/drm_auth.h
Extension
.h
Size
4280 bytes
Lines
140
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct drm_master {
	struct kref refcount;
	struct drm_device *dev;
	/**
	 * @unique: Unique identifier: e.g. busid. Protected by
	 * &drm_device.master_mutex.
	 */
	char *unique;
	/**
	 * @unique_len: Length of unique field. Protected by
	 * &drm_device.master_mutex.
	 */
	int unique_len;
	/**
	 * @magic_map: Map of used authentication tokens. Protected by
	 * &drm_device.master_mutex.
	 */
	struct idr magic_map;
	void *driver_priv;

	/**
	 * @lessor:
	 *
	 * Lease grantor, only set if this &struct drm_master represents a
	 * lessee holding a lease of objects from @lessor. Full owners of the
	 * device have this set to NULL.
	 *
	 * The lessor does not change once it's set in drm_lease_create(), and
	 * each lessee holds a reference to its lessor that it releases upon
	 * being destroyed in drm_lease_destroy().
	 *
	 * See also the :ref:`section on display resource leasing
	 * <drm_leasing>`.
	 */
	struct drm_master *lessor;

	/**
	 * @lessee_id:
	 *
	 * ID for lessees. Owners (i.e. @lessor is NULL) always have ID 0.
	 * Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex.
	 */
	int	lessee_id;

	/**
	 * @lessee_list:
	 *
	 * List entry of lessees of @lessor, where they are linked to @lessees.
	 * Not used for owners. Protected by &drm_device.mode_config's
	 * &drm_mode_config.idr_mutex.
	 */
	struct list_head lessee_list;

	/**
	 * @lessees:
	 *
	 * List of drm_masters leasing from this one. Protected by
	 * &drm_device.mode_config's &drm_mode_config.idr_mutex.
	 *
	 * This list is empty if no leases have been granted, or if all lessees
	 * have been destroyed. Since lessors are referenced by all their
	 * lessees, this master cannot be destroyed unless the list is empty.
	 */
	struct list_head lessees;

	/**
	 * @leases:
	 *
	 * Objects leased to this drm_master. Protected by
	 * &drm_device.mode_config's &drm_mode_config.idr_mutex.
	 *
	 * Objects are leased all together in drm_lease_create(), and are
	 * removed all together when the lease is revoked.
	 */
	struct idr leases;

	/**
	 * @lessee_idr:
	 *
	 * All lessees under this owner (only used where @lessor is NULL).
	 * Protected by &drm_device.mode_config's &drm_mode_config.idr_mutex.
	 */
	struct idr lessee_idr;
};

struct drm_master *drm_master_get(struct drm_master *master);
struct drm_master *drm_file_get_master(struct drm_file *file_priv);
void drm_master_put(struct drm_master **master);
bool drm_is_current_master(struct drm_file *fpriv);

Annotation

Implementation Notes