24  *	struct drm_exec exec;
28  *	drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT);
29  *	drm_exec_until_all_locked(&exec) {
30  *		ret = drm_exec_prepare_obj(&exec, boA, 1);
31  *		drm_exec_retry_on_contention(&exec);
35  *		ret = drm_exec_prepare_obj(&exec, boB, 1);
36  *		drm_exec_retry_on_contention(&exec);
41  *	drm_exec_for_each_locked_object(&exec, index, obj) {
45  *	drm_exec_fini(&exec);
54 static void drm_exec_unlock_all(struct drm_exec *exec)  in drm_exec_unlock_all()  argument
59 	drm_exec_for_each_locked_object_reverse(exec, index, obj) {  in drm_exec_unlock_all()
64 	drm_gem_object_put(exec->prelocked);  in drm_exec_unlock_all()
65 	exec->prelocked = NULL;  in drm_exec_unlock_all()
70  * @exec: the drm_exec object to initialize
79 void drm_exec_init(struct drm_exec *exec, u32 flags, unsigned nr)  in drm_exec_init()  argument
84 	exec->flags = flags;  in drm_exec_init()
85 	exec->objects = kvmalloc_array(nr, sizeof(void *), GFP_KERNEL);  in drm_exec_init()
88 	exec->max_objects = exec->objects ? nr : 0;  in drm_exec_init()
89 	exec->num_objects = 0;  in drm_exec_init()
90 	exec->contended = DRM_EXEC_DUMMY;  in drm_exec_init()
91 	exec->prelocked = NULL;  in drm_exec_init()
97  * @exec: the drm_exec object to finalize
102 void drm_exec_fini(struct drm_exec *exec)  in drm_exec_fini()  argument
104 	drm_exec_unlock_all(exec);  in drm_exec_fini()
105 	kvfree(exec->objects);  in drm_exec_fini()
106 	if (exec->contended != DRM_EXEC_DUMMY) {  in drm_exec_fini()
107 		drm_gem_object_put(exec->contended);  in drm_exec_fini()
108 		ww_acquire_fini(&exec->ticket);  in drm_exec_fini()
115  * @exec: the drm_exec object to cleanup
121 bool drm_exec_cleanup(struct drm_exec *exec)  in drm_exec_cleanup()  argument
123 	if (likely(!exec->contended)) {  in drm_exec_cleanup()
124 		ww_acquire_done(&exec->ticket);  in drm_exec_cleanup()
128 	if (likely(exec->contended == DRM_EXEC_DUMMY)) {  in drm_exec_cleanup()
129 		exec->contended = NULL;  in drm_exec_cleanup()
130 		ww_acquire_init(&exec->ticket, &reservation_ww_class);  in drm_exec_cleanup()
134 	drm_exec_unlock_all(exec);  in drm_exec_cleanup()
135 	exec->num_objects = 0;  in drm_exec_cleanup()
141 static int drm_exec_obj_locked(struct drm_exec *exec,  in drm_exec_obj_locked()  argument
144 	if (unlikely(exec->num_objects == exec->max_objects)) {  in drm_exec_obj_locked()
145 		size_t size = exec->max_objects * sizeof(void *);  in drm_exec_obj_locked()
148 		tmp = kvrealloc(exec->objects, size + PAGE_SIZE, GFP_KERNEL);  in drm_exec_obj_locked()
152 		exec->objects = tmp;  in drm_exec_obj_locked()
153 		exec->max_objects += PAGE_SIZE / sizeof(void *);  in drm_exec_obj_locked()
156 	exec->objects[exec->num_objects++] = obj;  in drm_exec_obj_locked()
162 static int drm_exec_lock_contended(struct drm_exec *exec)  in drm_exec_lock_contended()  argument
164 	struct drm_gem_object *obj = exec->contended;  in drm_exec_lock_contended()
171 	exec->contended = NULL;  in drm_exec_lock_contended()
172 	if (exec->flags & DRM_EXEC_INTERRUPTIBLE_WAIT) {  in drm_exec_lock_contended()
174 						       &exec->ticket);  in drm_exec_lock_contended()
178 		dma_resv_lock_slow(obj->resv, &exec->ticket);  in drm_exec_lock_contended()
181 	ret = drm_exec_obj_locked(exec, obj);  in drm_exec_lock_contended()
185 	exec->prelocked = obj;  in drm_exec_lock_contended()
198  * @exec: the drm_exec object with the state
207 int drm_exec_lock_obj(struct drm_exec *exec, struct drm_gem_object *obj)  in drm_exec_lock_obj()  argument
211 	ret = drm_exec_lock_contended(exec);  in drm_exec_lock_obj()
215 	if (exec->prelocked == obj) {  in drm_exec_lock_obj()
216 		drm_gem_object_put(exec->prelocked);  in drm_exec_lock_obj()
217 		exec->prelocked = NULL;  in drm_exec_lock_obj()
221 	if (exec->flags & DRM_EXEC_INTERRUPTIBLE_WAIT)  in drm_exec_lock_obj()
222 		ret = dma_resv_lock_interruptible(obj->resv, &exec->ticket);  in drm_exec_lock_obj()
224 		ret = dma_resv_lock(obj->resv, &exec->ticket);  in drm_exec_lock_obj()
228 		exec->contended = obj;  in drm_exec_lock_obj()
233 	    exec->flags & DRM_EXEC_IGNORE_DUPLICATES)  in drm_exec_lock_obj()
239 	ret = drm_exec_obj_locked(exec, obj);  in drm_exec_lock_obj()
252  * drm_exec_unlock_obj - unlock a GEM object in this exec context
253  * @exec: the drm_exec object with the state
260 void drm_exec_unlock_obj(struct drm_exec *exec, struct drm_gem_object *obj)  in drm_exec_unlock_obj()  argument
264 	for (i = exec->num_objects; i--;) {  in drm_exec_unlock_obj()
265 		if (exec->objects[i] == obj) {  in drm_exec_unlock_obj()
267 			for (++i; i < exec->num_objects; ++i)  in drm_exec_unlock_obj()
268 				exec->objects[i - 1] = exec->objects[i];  in drm_exec_unlock_obj()
269 			--exec->num_objects;  in drm_exec_unlock_obj()
280  * @exec: the drm_exec object with the state
289 int drm_exec_prepare_obj(struct drm_exec *exec, struct drm_gem_object *obj,  in drm_exec_prepare_obj()  argument
294 	ret = drm_exec_lock_obj(exec, obj);  in drm_exec_prepare_obj()
300 		drm_exec_unlock_obj(exec, obj);  in drm_exec_prepare_obj()
310  * @exec: the drm_exec object with the state
321 int drm_exec_prepare_array(struct drm_exec *exec,  in drm_exec_prepare_array()  argument
329 		ret = drm_exec_prepare_obj(exec, objects[i], num_fences);  in drm_exec_prepare_array()