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 intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
19 sg_free_table(pages);
20 kfree(pages);
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 unsigned int flags;
26 struct sg_table *pages;
27 int err;
28
29 flags = 0;
30 if (obj->flags & I915_BO_ALLOC_CONTIGUOUS)
31 flags |= TTM_PL_FLAG_CONTIGUOUS;
32
33 obj->mm.res = intel_region_ttm_resource_alloc(obj->mm.region,
34 obj->base.size,
35 flags);
36 if (IS_ERR(obj->mm.res))
37 return PTR_ERR(obj->mm.res);
38
39 pages = intel_region_ttm_resource_to_st(obj->mm.region, obj->mm.res);
40 if (IS_ERR(pages)) {
41 err = PTR_ERR(pages);
42 goto err_free_resource;
43 }
44
45 __i915_gem_object_set_pages(obj, pages, i915_sg_dma_sizes(pages->sgl));
46
47 return 0;
48
49 err_free_resource:
50 intel_region_ttm_resource_free(obj->mm.region, obj->mm.res);
51 return err;
52 }
53
54 static const struct drm_i915_gem_object_ops mock_region_obj_ops = {
55 .name = "mock-region",
56 .get_pages = mock_region_get_pages,
57 .put_pages = mock_region_put_pages,
58 .release = i915_gem_object_release_memory_region,
59 };
60
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)61 static int mock_object_init(struct intel_memory_region *mem,
62 struct drm_i915_gem_object *obj,
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->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
77
78 i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
79
80 i915_gem_object_init_memory_region(obj, mem);
81
82 return 0;
83 }
84
mock_region_fini(struct intel_memory_region * mem)85 static void mock_region_fini(struct intel_memory_region *mem)
86 {
87 struct drm_i915_private *i915 = mem->i915;
88 int instance = mem->instance;
89
90 intel_region_ttm_fini(mem);
91 ida_free(&i915->selftest.mock_region_instances, instance);
92 }
93
94 static const struct intel_memory_region_ops mock_region_ops = {
95 .init = intel_region_ttm_init,
96 .release = mock_region_fini,
97 .init_object = mock_object_init,
98 };
99
100 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)101 mock_region_create(struct drm_i915_private *i915,
102 resource_size_t start,
103 resource_size_t size,
104 resource_size_t min_page_size,
105 resource_size_t io_start)
106 {
107 int instance = ida_alloc_max(&i915->selftest.mock_region_instances,
108 TTM_NUM_MEM_TYPES - TTM_PL_PRIV - 1,
109 GFP_KERNEL);
110
111 if (instance < 0)
112 return ERR_PTR(instance);
113
114 return intel_memory_region_create(i915, start, size, min_page_size,
115 io_start, INTEL_MEMORY_MOCK, instance,
116 &mock_region_ops);
117 }
118