drivers/gpu/drm/i915/i915_deps.h

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright © 2021 Intel Corporation
   4  */
   5
   6 #ifndef _I915_DEPS_H_
   7 #define _I915_DEPS_H_
   8
   9 #include <linux/types.h>
  10
  11 struct ttm_operation_ctx;
  12 struct dma_fence;
  13 struct dma_resv;
  14
  15 /**
  16  * struct i915_deps - Collect dependencies into a single dma-fence
  17  * @single: Storage for pointer if the collection is a single fence.
  18  * @fences: Allocated array of fence pointers if more than a single fence;
  19  * otherwise points to the address of @single.
  20  * @num_deps: Current number of dependency fences.
  21  * @fences_size: Size of the @fences array in number of pointers.
  22  * @gfp: Allocation mode.
  23  */
  24 struct i915_deps {
  25         struct dma_fence *single;
  26         struct dma_fence **fences;
  27         unsigned int num_deps;
  28         unsigned int fences_size;
  29         gfp_t gfp;
  30 };
  31
  32 void i915_deps_init(struct i915_deps *deps, gfp_t gfp);
  33
  34 void i915_deps_fini(struct i915_deps *deps);
  35
  36 int i915_deps_add_dependency(struct i915_deps *deps,
  37                              struct dma_fence *fence,
  38                              const struct ttm_operation_ctx *ctx);
  39
  40 int i915_deps_add_resv(struct i915_deps *deps, struct dma_resv *resv,
  41                        const struct ttm_operation_ctx *ctx);
  42
  43 int i915_deps_sync(const struct i915_deps *deps,
  44                    const struct ttm_operation_ctx *ctx);
  45 #endif