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 = (void *)(&array[1]);  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
122 	num_pending = atomic_read_acquire(&array->num_pending);  in dma_fence_array_signaled()
123 	if (test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, &array->base.flags)) {  in dma_fence_array_signaled()
129 	for (i = 0; i < array->num_fences; ++i) {  in dma_fence_array_signaled()
130 		if (dma_fence_is_signaled(array->fences[i]) && !--num_pending)  in dma_fence_array_signaled()
136 	dma_fence_array_clear_pending_error(array);  in dma_fence_array_signaled()
142 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_array_release()  local
145 	for (i = 0; i < array->num_fences; ++i)  in dma_fence_array_release()
146 		dma_fence_put(array->fences[i]);  in dma_fence_array_release()
148 	kfree(array->fences);  in dma_fence_array_release()
155 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_array_set_deadline()  local
158 	for (i = 0; i < array->num_fences; ++i)  in dma_fence_array_set_deadline()
159 		dma_fence_set_deadline(array->fences[i], deadline);  in dma_fence_array_set_deadline()
173  * dma_fence_array_create - Create a custom fence array
174  * @num_fences:		[in]	number of fences to add in the array
175  * @fences:		[in]	array containing the fences
178  * @signal_on_any:	[in]	signal on any fence in the array
184  * The caller should allocate the fences array with num_fences size
186  * array is taken and dma_fence_put() is used on each fence on release.
188  * If @signal_on_any is true the fence array signals if any fence in the array
189  * signals, otherwise it signals when all fences in the array signal.
196 	struct dma_fence_array *array;  in dma_fence_array_create()  local
197 	size_t size = sizeof(*array);  in dma_fence_array_create()
201 	/* Allocate the callback structures behind the array. */  in dma_fence_array_create()
203 	array = kzalloc(size, GFP_KERNEL);  in dma_fence_array_create()
204 	if (!array)  in dma_fence_array_create()
207 	spin_lock_init(&array->lock);  in dma_fence_array_create()
208 	dma_fence_init(&array->base, &dma_fence_array_ops, &array->lock,  in dma_fence_array_create()
210 	init_irq_work(&array->work, irq_dma_fence_array_work);  in dma_fence_array_create()
212 	array->num_fences = num_fences;  in dma_fence_array_create()
213 	atomic_set(&array->num_pending, signal_on_any ? 1 : num_fences);  in dma_fence_array_create()
214 	array->fences = fences;  in dma_fence_array_create()
216 	array->base.error = PENDING_ERROR;  in dma_fence_array_create()
223 	 * The correct way of handling this is to flatten out the array by the  in dma_fence_array_create()
232 	return array;  in dma_fence_array_create()
238  * @fence:		[in]	fence or fence array
241  * Checks the provided fence or, for a fence array, all fences in the array
247 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_match_context()  local
253 	for (i = 0; i < array->num_fences; i++) {  in dma_fence_match_context()
254 		if (array->fences[i]->context != context)  in dma_fence_match_context()
264 	struct dma_fence_array *array;  in dma_fence_array_first()  local
269 	array = to_dma_fence_array(head);  in dma_fence_array_first()
270 	if (!array)  in dma_fence_array_first()
273 	if (!array->num_fences)  in dma_fence_array_first()
276 	return array->fences[0];  in dma_fence_array_first()
283 	struct dma_fence_array *array = to_dma_fence_array(head);  in dma_fence_array_next()  local
285 	if (!array || index >= array->num_fences)  in dma_fence_array_next()
288 	return array->fences[index];  in dma_fence_array_next()