drivers/gpu/drm/i915/selftests/mock_region.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright © 2019 Intel Corporation
   4  */
   5
   6 #include "gem/i915_gem_region.h"
   7 #include "intel_memory_region.h"
   8
   9 #include "mock_region.h"
  10
  11 static const struct drm_i915_gem_object_ops mock_region_obj_ops = {
  12         .get_pages = i915_gem_object_get_pages_buddy,
  13         .put_pages = i915_gem_object_put_pages_buddy,
  14         .release = i915_gem_object_release_memory_region,
  15 };
  16
  17 static struct drm_i915_gem_object *
  18 mock_object_create(struct intel_memory_region *mem,
  19                    resource_size_t size,
  20                    unsigned int flags)
  21 {
  22         static struct lock_class_key lock_class;
  23         struct drm_i915_private *i915 = mem->i915;
  24         struct drm_i915_gem_object *obj;
  25
  26         if (size > BIT(mem->mm.max_order) * mem->mm.chunk_size)
  27                 return ERR_PTR(-E2BIG);
  28
  29         obj = i915_gem_object_alloc();
  30         if (!obj)
  31                 return ERR_PTR(-ENOMEM);
  32
  33         drm_gem_private_object_init(&i915->drm, &obj->base, size);
  34         i915_gem_object_init(obj, &mock_region_obj_ops, &lock_class);
  35
  36         obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
  37
  38         i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
  39
  40         i915_gem_object_init_memory_region(obj, mem, flags);
  41
  42         return obj;
  43 }
  44
  45 static const struct intel_memory_region_ops mock_region_ops = {
  46         .init = intel_memory_region_init_buddy,
  47         .release = intel_memory_region_release_buddy,
  48         .create_object = mock_object_create,
  49 };
  50
  51 struct intel_memory_region *
  52 mock_region_create(struct drm_i915_private *i915,
  53                    resource_size_t start,
  54                    resource_size_t size,
  55                    resource_size_t min_page_size,
  56                    resource_size_t io_start)
  57 {
  58         return intel_memory_region_create(i915, start, size, min_page_size,
  59                                           io_start, &mock_region_ops);
  60 }