| 1 |
|
| 2 | |
| 3 | * fence-array: aggregates fence to be waited together
|
| 4 | *
|
| 5 | * Copyright (C) 2016 Collabora Ltd
|
| 6 | * Copyright (C) 2016 Advanced Micro Devices, Inc.
|
| 7 | * Authors:
|
| 8 | * Gustavo Padovan <[email protected]>
|
| 9 | * Christian König <[email protected]>
|
| 10 |
|
| 11 |
|
| 12 | #ifndef __LINUX_DMA_FENCE_ARRAY_H
|
| 13 | #define __LINUX_DMA_FENCE_ARRAY_H
|
| 14 |
|
| 15 | #include <linux/dma-fence.h>
|
| 16 | #include <linux/irq_work.h>
|
| 17 |
|
| 18 | |
| 19 | * struct dma_fence_array_cb - callback helper for fence array
|
| 20 | * @cb: fence callback structure for signaling
|
| 21 | * @array: reference to the parent fence array object
|
| 22 |
|
| 23 | struct dma_fence_array_cb {
|
| 24 | struct dma_fence_cb cb;
|
| 25 | struct dma_fence_array *array;
|
| 26 | };
|
| 27 |
|
| 28 | |
| 29 | * struct dma_fence_array - fence to represent an array of fences
|
| 30 | * @base: fence base class
|
| 31 | * @num_fences: number of fences in the array
|
| 32 | * @num_pending: fences in the array still pending
|
| 33 | * @fences: array of the fences
|
| 34 | * @work: internal irq_work function
|
| 35 | * @callbacks: array of callback helpers
|
| 36 |
|
| 37 | struct dma_fence_array {
|
| 38 | struct dma_fence base;
|
| 39 |
|
| 40 | unsigned num_fences;
|
| 41 | atomic_t num_pending;
|
| 42 | struct dma_fence **fences;
|
| 43 |
|
| 44 | struct irq_work work;
|
| 45 |
|
| 46 | struct dma_fence_array_cb callbacks[] __counted_by(num_fences);
|
| 47 | };
|
| 48 |
|
| 49 | |
| 50 | * to_dma_fence_array - cast a fence to a dma_fence_array
|
| 51 | * @fence: fence to cast to a dma_fence_array
|
| 52 | *
|
| 53 | * Returns NULL if the fence is not a dma_fence_array,
|
| 54 | * or the dma_fence_array otherwise.
|
| 55 |
|
| 56 | static inline struct dma_fence_array *
|
| 57 | to_dma_fence_array(struct dma_fence *fence)
|
| 58 | {
|
| 59 | if (!fence || !dma_fence_is_array(fence))
|
| 60 | return NULL;
|
| 61 |
|
| 62 | return container_of(fence, struct dma_fence_array, base);
|
| 63 | }
|
| 64 |
|
| 65 | |
| 66 | * dma_fence_array_for_each - iterate over all fences in array
|
| 67 | * @fence: current fence
|
| 68 | * @index: index into the array
|
| 69 | * @head: potential dma_fence_array object
|
| 70 | *
|
| 71 | * Test if @array is a dma_fence_array object and if yes iterate over all fences
|
| 72 | * in the array. If not just iterate over the fence in @array itself.
|
| 73 | *
|
| 74 | * For a deep dive iterator see dma_fence_unwrap_for_each().
|
| 75 |
|
| 76 | #define dma_fence_array_for_each(fence, index, head) \
|
| 77 | for (index = 0, fence = dma_fence_array_first(head); fence; \
|
| 78 | ++(index), fence = dma_fence_array_next(head, index))
|
| 79 |
|
| 80 | struct dma_fence_array *dma_fence_array_alloc(int num_fences);
|
| 81 | void dma_fence_array_init(struct dma_fence_array *array,
|
| 82 | int num_fences, struct dma_fence **fences,
|
| 83 | u64 context, unsigned seqno);
|
| 84 |
|
| 85 | struct dma_fence_array *dma_fence_array_create(int num_fences,
|
| 86 | struct dma_fence **fences,
|
| 87 | u64 context, unsigned seqno);
|
| 88 |
|
| 89 | bool dma_fence_match_context(struct dma_fence *fence, u64 context);
|
| 90 |
|
| 91 | struct dma_fence *dma_fence_array_first(struct dma_fence *head);
|
| 92 | struct dma_fence *dma_fence_array_next(struct dma_fence *head,
|
| 93 | unsigned int index);
|
| 94 |
|
| 95 | #endif
|