3  * dma-fence-array: aggregate fences to be waited together
14 #include <linux/dma-fence-array.h>
28 static void dma_fence_array_set_pending_error(struct dma_fence_array *array,  in dma_fence_array_set_pending_error()  argument
36 		cmpxchg(&array->base.error, PENDING_ERROR, error);  in dma_fence_array_set_pending_error()
39 static void dma_fence_array_clear_pending_error(struct dma_fence_array *array)  in dma_fence_array_clear_pending_error()  argument
42 	cmpxchg(&array->base.error, PENDING_ERROR, 0);  in dma_fence_array_clear_pending_error()
47 	struct dma_fence_array *array = container_of(wrk, typeof(*array), work);  in irq_dma_fence_array_work()  local
49 	dma_fence_array_clear_pending_error(array);  in irq_dma_fence_array_work()
51 	dma_fence_signal(&array->base);  in irq_dma_fence_array_work()
52 	dma_fence_put(&array->base);  in irq_dma_fence_array_work()
60 	struct dma_fence_array *array = array_cb->array;  in dma_fence_array_cb_func()  local
62 	dma_fence_array_set_pending_error(array, f->error);  in dma_fence_array_cb_func()
64 	if (atomic_dec_and_test(&array->num_pending))  in dma_fence_array_cb_func()
65 		irq_work_queue(&array->work);  in dma_fence_array_cb_func()
67 		dma_fence_put(&array->base);  in dma_fence_array_cb_func()
72 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_array_enable_signaling()  local
73 	struct dma_fence_array_cb *cb = array->callbacks;  in dma_fence_array_enable_signaling()
76 	for (i = 0; i < array->num_fences; ++i) {  in dma_fence_array_enable_signaling()
77 		cb[i].array = array;  in dma_fence_array_enable_signaling()
81 		 * reference count on the array so that we do not free it too  in dma_fence_array_enable_signaling()
83 		 * until we signal the array as complete (but that is now  in dma_fence_array_enable_signaling()
86 		dma_fence_get(&array->base);  in dma_fence_array_enable_signaling()
87 		if (dma_fence_add_callback(array->fences[i], &cb[i].cb,  in dma_fence_array_enable_signaling()
89 			int error = array->fences[i]->error;  in dma_fence_array_enable_signaling()
91 			dma_fence_array_set_pending_error(array, error);  in dma_fence_array_enable_signaling()
92 			dma_fence_put(&array->base);  in dma_fence_array_enable_signaling()
93 			if (atomic_dec_and_test(&array->num_pending)) {  in dma_fence_array_enable_signaling()
94 				dma_fence_array_clear_pending_error(array);  in dma_fence_array_enable_signaling()
105 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_array_signaled()  local
107 	if (atomic_read(&array->num_pending) > 0)  in dma_fence_array_signaled()
110 	dma_fence_array_clear_pending_error(array);  in dma_fence_array_signaled()
116 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_array_release()  local
119 	for (i = 0; i < array->num_fences; ++i)  in dma_fence_array_release()
120 		dma_fence_put(array->fences[i]);  in dma_fence_array_release()
122 	kfree(array->fences);  in dma_fence_array_release()
129 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_array_set_deadline()  local
132 	for (i = 0; i < array->num_fences; ++i)  in dma_fence_array_set_deadline()
133 		dma_fence_set_deadline(array->fences[i], deadline);  in dma_fence_array_set_deadline()
147  * dma_fence_array_alloc - Allocate a custom fence array
148  * @num_fences:		[in]	number of fences to add in the array
150  * Return dma fence array on success, NULL on failure
154 	struct dma_fence_array *array;  in dma_fence_array_alloc()  local
156 	return kzalloc(struct_size(array, callbacks, num_fences), GFP_KERNEL);  in dma_fence_array_alloc()
161  * dma_fence_array_init - Init a custom fence array
162  * @array:		[in]	dma fence array to arm
163  * @num_fences:		[in]	number of fences to add in the array
164  * @fences:		[in]	array containing the fences
167  * @signal_on_any:	[in]	signal on any fence in the array
170  * a preallocated dma fence array in the path of reclaim or dma fence signaling.
172 void dma_fence_array_init(struct dma_fence_array *array,  in dma_fence_array_init()  argument
179 	array->num_fences = num_fences;  in dma_fence_array_init()
181 	spin_lock_init(&array->lock);  in dma_fence_array_init()
182 	dma_fence_init(&array->base, &dma_fence_array_ops, &array->lock,  in dma_fence_array_init()
184 	init_irq_work(&array->work, irq_dma_fence_array_work);  in dma_fence_array_init()
186 	atomic_set(&array->num_pending, signal_on_any ? 1 : num_fences);  in dma_fence_array_init()
187 	array->fences = fences;  in dma_fence_array_init()
189 	array->base.error = PENDING_ERROR;  in dma_fence_array_init()
196 	 * The correct way of handling this is to flatten out the array by the  in dma_fence_array_init()
208  * dma_fence_array_create - Create a custom fence array
209  * @num_fences:		[in]	number of fences to add in the array
210  * @fences:		[in]	array containing the fences
213  * @signal_on_any:	[in]	signal on any fence in the array
219  * The caller should allocate the fences array with num_fences size
221  * array is taken and dma_fence_put() is used on each fence on release.
223  * If @signal_on_any is true the fence array signals if any fence in the array
224  * signals, otherwise it signals when all fences in the array signal.
231 	struct dma_fence_array *array;  in dma_fence_array_create()  local
233 	array = dma_fence_array_alloc(num_fences);  in dma_fence_array_create()
234 	if (!array)  in dma_fence_array_create()
237 	dma_fence_array_init(array, num_fences, fences,  in dma_fence_array_create()
240 	return array;  in dma_fence_array_create()
246  * @fence:		[in]	fence or fence array
249  * Checks the provided fence or, for a fence array, all fences in the array
255 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_match_context()  local
261 	for (i = 0; i < array->num_fences; i++) {  in dma_fence_match_context()
262 		if (array->fences[i]->context != context)  in dma_fence_match_context()
272 	struct dma_fence_array *array;  in dma_fence_array_first()  local
277 	array = to_dma_fence_array(head);  in dma_fence_array_first()
278 	if (!array)  in dma_fence_array_first()
281 	if (!array->num_fences)  in dma_fence_array_first()
284 	return array->fences[0];  in dma_fence_array_first()
291 	struct dma_fence_array *array = to_dma_fence_array(head);  in dma_fence_array_next()  local
293 	if (!array || index >= array->num_fences)  in dma_fence_array_next()
296 	return array->fences[index];  in dma_fence_array_next()