1 // SPDX-License-Identifier: MIT
2 /*
3 * Copyright © 2019-2021 Intel Corporation
4 */
5
6 #include <drm/ttm/ttm_placement.h>
7 #include <linux/scatterlist.h>
8
9 #include "gem/i915_gem_region.h"
10 #include "intel_memory_region.h"
11 #include "intel_region_ttm.h"
12
13 #include "mock_region.h"
14
mock_region_put_pages(struct drm_i915_gem_object * obj,struct sg_table * pages)15 static void mock_region_put_pages(struct drm_i915_gem_object *obj,
16 struct sg_table *pages)
17 {
18 i915_refct_sgt_put(obj->mm.rsgt);
19 obj->mm.rsgt = NULL;
20 intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
21 }
22
mock_region_get_pages(struct drm_i915_gem_object * obj)23 static int mock_region_get_pages(struct drm_i915_gem_object *obj)
24 {
25 struct sg_table *pages;
26 int err;
27
28 obj->mm.res = intel_region_ttm_resource_alloc(obj->mm.region,
29 obj->bo_offset,
30 obj->base.size,
31 obj->flags);
32 if (IS_ERR(obj->mm.res))
33 return PTR_ERR(obj->mm.res);
34
35 obj->mm.rsgt = intel_region_ttm_resource_to_rsgt(obj->mm.region,
36 obj->mm.res,
37 obj->mm.region->min_page_size);
38 if (IS_ERR(obj->mm.rsgt)) {
39 err = PTR_ERR(obj->mm.rsgt);
40 goto err_free_resource;
41 }
42
43 pages = &obj->mm.rsgt->table;
44 __i915_gem_object_set_pages(obj, pages);
45
46 return 0;
47
48 err_free_resource:
49 intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
50 return err;
51 }
52
53 static const struct drm_i915_gem_object_ops mock_region_obj_ops = {
54 .name = "mock-region",
55 .get_pages = mock_region_get_pages,
56 .put_pages = mock_region_put_pages,
57 .release = i915_gem_object_release_memory_region,
58 };
59
mock_object_init(struct intel_memory_region * mem,struct drm_i915_gem_object * obj,resource_size_t offset,resource_size_t size,resource_size_t page_size,unsigned int flags)60 static int mock_object_init(struct intel_memory_region *mem,
61 struct drm_i915_gem_object *obj,
62 resource_size_t offset,
63 resource_size_t size,
64 resource_size_t page_size,
65 unsigned int flags)
66 {
67 static struct lock_class_key lock_class;
68 struct drm_i915_private *i915 = mem->i915;
69
70 if (size > resource_size(&mem->region))
71 return -E2BIG;
72
73 drm_gem_private_object_init(&i915->drm, &obj->base, size);
74 i915_gem_object_init(obj, &mock_region_obj_ops, &lock_class, flags);
75
76 obj->bo_offset = offset;
77
78 obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
79
80 i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
81
82 i915_gem_object_init_memory_region(obj, mem);
83
84 return 0;
85 }
86
mock_region_fini(struct intel_memory_region * mem)87 static int mock_region_fini(struct intel_memory_region *mem)
88 {
89 struct drm_i915_private *i915 = mem->i915;
90 int instance = mem->instance;
91 int ret;
92
93 ret = intel_region_ttm_fini(mem);
94 ida_free(&i915->selftest.mock_region_instances, instance);
95
96 return ret;
97 }
98
99 static const struct intel_memory_region_ops mock_region_ops = {
100 .init = intel_region_ttm_init,
101 .release = mock_region_fini,
102 .init_object = mock_object_init,
103 };
104
105 struct intel_memory_region *
mock_region_create(struct drm_i915_private * i915,resource_size_t start,resource_size_t size,resource_size_t min_page_size,resource_size_t io_start,resource_size_t io_size)106 mock_region_create(struct drm_i915_private *i915,
107 resource_size_t start,
108 resource_size_t size,
109 resource_size_t min_page_size,
110 resource_size_t io_start,
111 resource_size_t io_size)
112 {
113 int instance = ida_alloc_max(&i915->selftest.mock_region_instances,
114 TTM_NUM_MEM_TYPES - TTM_PL_PRIV - 1,
115 GFP_KERNEL);
116
117 if (instance < 0)
118 return ERR_PTR(instance);
119
120 return intel_memory_region_create(i915, start, size, min_page_size,
121 io_start, io_size,
122 INTEL_MEMORY_MOCK, instance,
123 &mock_region_ops);
124 }
125