summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/i915_deps.h
blob: d76c0106c9101b337f01c0ad154b5825434c9541 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2021 Intel Corporation
 */

#ifndef _I915_DEPS_H_
#define _I915_DEPS_H_

#include <linux/types.h>

struct ttm_operation_ctx;
struct dma_fence;
struct dma_resv;

/**
 * struct i915_deps - Collect dependencies into a single dma-fence
 * @single: Storage for pointer if the collection is a single fence.
 * @fences: Allocated array of fence pointers if more than a single fence;
 * otherwise points to the address of @single.
 * @num_deps: Current number of dependency fences.
 * @fences_size: Size of the @fences array in number of pointers.
 * @gfp: Allocation mode.
 */
struct i915_deps {
	struct dma_fence *single;
	struct dma_fence **fences;
	unsigned int num_deps;
	unsigned int fences_size;
	gfp_t gfp;
};

void i915_deps_init(struct i915_deps *deps, gfp_t gfp);

void i915_deps_fini(struct i915_deps *deps);

int i915_deps_add_dependency(struct i915_deps *deps,
			     struct dma_fence *fence,
			     const struct ttm_operation_ctx *ctx);

int i915_deps_add_resv(struct i915_deps *deps, struct dma_resv *resv,
		       const struct ttm_operation_ctx *ctx);

int i915_deps_sync(const struct i915_deps *deps,
		   const struct ttm_operation_ctx *ctx);
#endif