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
107 	return atomic_read(&array->num_pending) <= 0;  in dma_fence_array_signaled()
112 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_array_release()  local
115 	for (i = 0; i < array->num_fences; ++i)  in dma_fence_array_release()
116 		dma_fence_put(array->fences[i]);  in dma_fence_array_release()
118 	kfree(array->fences);  in dma_fence_array_release()
132  * dma_fence_array_create - Create a custom fence array
133  * @num_fences:		[in]	number of fences to add in the array
134  * @fences:		[in]	array containing the fences
137  * @signal_on_any:	[in]	signal on any fence in the array
143  * The caller should allocate the fences array with num_fences size
145  * array is taken and dma_fence_put() is used on each fence on release.
147  * If @signal_on_any is true the fence array signals if any fence in the array
148  * signals, otherwise it signals when all fences in the array signal.
155 	struct dma_fence_array *array;  in dma_fence_array_create()  local
156 	size_t size = sizeof(*array);  in dma_fence_array_create()
158 	/* Allocate the callback structures behind the array. */  in dma_fence_array_create()
160 	array = kzalloc(size, GFP_KERNEL);  in dma_fence_array_create()
161 	if (!array)  in dma_fence_array_create()
164 	spin_lock_init(&array->lock);  in dma_fence_array_create()
165 	dma_fence_init(&array->base, &dma_fence_array_ops, &array->lock,  in dma_fence_array_create()
167 	init_irq_work(&array->work, irq_dma_fence_array_work);  in dma_fence_array_create()
169 	array->num_fences = num_fences;  in dma_fence_array_create()
170 	atomic_set(&array->num_pending, signal_on_any ? 1 : num_fences);  in dma_fence_array_create()
171 	array->fences = fences;  in dma_fence_array_create()
173 	array->base.error = PENDING_ERROR;  in dma_fence_array_create()
175 	return array;  in dma_fence_array_create()
181  * @fence:		[in]	fence or fence array
184  * Checks the provided fence or, for a fence array, all fences in the array
190 	struct dma_fence_array *array = to_dma_fence_array(fence);  in dma_fence_match_context()  local
196 	for (i = 0; i < array->num_fences; i++) {  in dma_fence_match_context()
197 		if (array->fences[i]->context != context)  in dma_fence_match_context()