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i5 4 '/* SPDX-License-Identifier: GPL-2.0 OR MIT */
#ifndef __DRM_EXEC_H__
#define __DRM_EXEC_H__
#include
#include
#define DRM_EXEC_INTERRUPTIBLE_WAIT BIT(0)
#define DRM_EXEC_IGNORE_DUPLICATES BIT(1)
struct drm_gem_object;
/**
* struct drm_exec - Execution context
*/
struct drm_exec {
/**
* @flags: Flags to control locking behavior
*/
u32 flags;
/**
* @ticket: WW ticket used for acquiring locks
*/
struct ww_acquire_ctx ticket;
/**
* @num_objects: number of objects locked
*/
unsigned int num_objects;
/**
* @max_objects: maximum objects in array
*/
unsigned int max_objects;
/**
* @objects: array of the locked objects
*/
struct drm_gem_object **objects;
/**
* @contended: contended GEM object we backed off for
*/
struct drm_gem_object *contended;
/**
* @prelocked: already locked GEM object due to contention
*/
struct drm_gem_object *prelocked;
};
/**
* drm_exec_obj() - Return the object for a give drm_exec index
* @exec: Pointer to the drm_exec context
* @index: The index.
*
* Return: Pointer to the locked object corresponding to @index if
* index is within the number of locked objects. NULL otherwise.
*/
static inline struct drm_gem_object *
drm_exec_obj(struct drm_exec *exec, unsigned long index)
{
return index < exec->num_objects ? exec->objects[index] : NULL;
}
/**
* drm_exec_for_each_locked_object - iterate over all the locked objects
* @exec: drm_exec object
* @index: unsigned long index for the iteration
* @obj: the current GEM object
*
* Iterate over all the locked GEM objects inside the drm_exec object.
*/
#define drm_exec_for_each_locked_object(exec, index, obj) \
for ((index) = 0; ((obj) = drm_exec_obj(exec, index)); ++(index))
/**
* drm_exec_for_each_locked_object_reverse - iterate over all the locked
* objects in reverse locking order
* @exec: drm_exec object
* @index: unsigned long index for the iteration
* @obj: the current GEM object
*
* Iterate over all the locked GEM objects inside the drm_exec object in
* reverse locking order. Note that @index may go below zero and wrap,
* but that will be caught by drm_exec_obj(), returning a NULL object.
*/
#define drm_exec_for_each_locked_object_reverse(exec, index, obj) \
for ((index) = (exec)->num_objects - 1; \
((obj) = drm_exec_obj(exec, index)); -