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 <drm/ttm/ttm_placement.h>
10
11 #include "gem/i915_gem_region.h"
12 #include "intel_memory_region.h"
13 #include "intel_region_ttm.h"
14
15 #include "mock_region.h"
16
mock_region_put_pages(struct drm_i915_gem_object * obj,struct sg_table * pages)17 static void mock_region_put_pages(struct drm_i915_gem_object *obj,
18 struct sg_table *pages)
19 {
20 intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
21 sg_free_table(pages);
22 kfree(pages);
23 }
24
mock_region_get_pages(struct drm_i915_gem_object * obj)25 static int mock_region_get_pages(struct drm_i915_gem_object *obj)
26 {
27 unsigned int flags;
28 struct sg_table *pages;
29 int err;
30
31 flags = 0;
32 if (obj->flags & I915_BO_ALLOC_CONTIGUOUS)
33 flags |= TTM_PL_FLAG_CONTIGUOUS;
34
35 obj->mm.res = intel_region_ttm_resource_alloc(obj->mm.region,
36 obj->base.size,
37 flags);
38 if (IS_ERR(obj->mm.res))
39 return PTR_ERR(obj->mm.res);
40
41 pages = intel_region_ttm_resource_to_st(obj->mm.region, obj->mm.res);
42 if (IS_ERR(pages)) {
43 err = PTR_ERR(pages);
44 goto err_free_resource;
45 }
46
47 __i915_gem_object_set_pages(obj, pages, i915_sg_dma_sizes(pages->sgl));
48
49 return 0;
50
51 err_free_resource:
52 intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
53 return err;
54 }
55
56 static const struct drm_i915_gem_object_ops mock_region_obj_ops = {
57 .name = "mock-region",
58 .get_pages = mock_region_get_pages,
59 .put_pages = mock_region_put_pages,
60 .release = i915_gem_object_release_memory_region,
61 };
62
mock_object_init(struct intel_memory_region * mem,struct drm_i915_gem_object * obj,resource_size_t size,resource_size_t page_size,unsigned int flags)63 static int mock_object_init(struct intel_memory_region *mem,
64 struct drm_i915_gem_object *obj,
65 resource_size_t size,
66 resource_size_t page_size,
67 unsigned int flags)
68 {
69 static struct lock_class_key lock_class;
70 struct drm_i915_private *i915 = mem->i915;
71
72 if (size > resource_size(&mem->region))
73 return -E2BIG;
74
75 drm_gem_private_object_init(&i915->drm, &obj->base, size);
76 i915_gem_object_init(obj, &mock_region_obj_ops, &lock_class, flags);
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 void mock_region_fini(struct intel_memory_region *mem)
88 {
89 struct drm_i915_private *i915 = mem->i915;
90 int instance = mem->instance;
91
92 intel_region_ttm_fini(mem);
93 ida_free(&i915->selftest.mock_region_instances, instance);
94 }
95
96 static const struct intel_memory_region_ops mock_region_ops = {
97 .init = intel_region_ttm_init,
98 .release = mock_region_fini,
99 .init_object = mock_object_init,
100 };
101
102 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)103 mock_region_create(struct drm_i915_private *i915,
104 resource_size_t start,
105 resource_size_t size,
106 resource_size_t min_page_size,
107 resource_size_t io_start)
108 {
109 int instance = ida_alloc_max(&i915->selftest.mock_region_instances,
110 TTM_NUM_MEM_TYPES - TTM_PL_PRIV - 1,
111 GFP_KERNEL);
112
113 if (instance < 0)
114 return ERR_PTR(instance);
115
116 return intel_memory_region_create(i915, start, size, min_page_size,
117 io_start, INTEL_MEMORY_MOCK, instance,
118 &mock_region_ops);
119 }
120