1 /*
2  * Copyright © 2016 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  *
23  */
24 
25 #include "mock_gtt.h"
26 
27 static void mock_insert_page(struct i915_address_space *vm,
28 			     dma_addr_t addr,
29 			     u64 offset,
30 			     enum i915_cache_level level,
31 			     u32 flags)
32 {
33 }
34 
35 static void mock_insert_entries(struct i915_address_space *vm,
36 				struct i915_vma *vma,
37 				enum i915_cache_level level, u32 flags)
38 {
39 }
40 
41 static int mock_bind_ppgtt(struct i915_vma *vma,
42 			   enum i915_cache_level cache_level,
43 			   u32 flags)
44 {
45 	GEM_BUG_ON(flags & I915_VMA_GLOBAL_BIND);
46 	vma->pages = vma->obj->mm.pages;
47 	vma->flags |= I915_VMA_LOCAL_BIND;
48 	return 0;
49 }
50 
51 static void mock_unbind_ppgtt(struct i915_vma *vma)
52 {
53 }
54 
55 static void mock_cleanup(struct i915_address_space *vm)
56 {
57 }
58 
59 struct i915_hw_ppgtt *
60 mock_ppgtt(struct drm_i915_private *i915,
61 	   const char *name)
62 {
63 	struct i915_hw_ppgtt *ppgtt;
64 
65 	ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
66 	if (!ppgtt)
67 		return NULL;
68 
69 	kref_init(&ppgtt->ref);
70 	ppgtt->base.i915 = i915;
71 	ppgtt->base.total = round_down(U64_MAX, PAGE_SIZE);
72 	ppgtt->base.file = ERR_PTR(-ENODEV);
73 
74 	INIT_LIST_HEAD(&ppgtt->base.active_list);
75 	INIT_LIST_HEAD(&ppgtt->base.inactive_list);
76 	INIT_LIST_HEAD(&ppgtt->base.unbound_list);
77 
78 	INIT_LIST_HEAD(&ppgtt->base.global_link);
79 	drm_mm_init(&ppgtt->base.mm, 0, ppgtt->base.total);
80 	i915_gem_timeline_init(i915, &ppgtt->base.timeline, name);
81 
82 	ppgtt->base.clear_range = nop_clear_range;
83 	ppgtt->base.insert_page = mock_insert_page;
84 	ppgtt->base.insert_entries = mock_insert_entries;
85 	ppgtt->base.bind_vma = mock_bind_ppgtt;
86 	ppgtt->base.unbind_vma = mock_unbind_ppgtt;
87 	ppgtt->base.cleanup = mock_cleanup;
88 
89 	return ppgtt;
90 }
91 
92 static int mock_bind_ggtt(struct i915_vma *vma,
93 			  enum i915_cache_level cache_level,
94 			  u32 flags)
95 {
96 	int err;
97 
98 	err = i915_get_ggtt_vma_pages(vma);
99 	if (err)
100 		return err;
101 
102 	vma->flags |= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;
103 	return 0;
104 }
105 
106 static void mock_unbind_ggtt(struct i915_vma *vma)
107 {
108 }
109 
110 void mock_init_ggtt(struct drm_i915_private *i915)
111 {
112 	struct i915_ggtt *ggtt = &i915->ggtt;
113 
114 	INIT_LIST_HEAD(&i915->vm_list);
115 
116 	ggtt->base.i915 = i915;
117 
118 	ggtt->mappable_base = 0;
119 	ggtt->mappable_end = 2048 * PAGE_SIZE;
120 	ggtt->base.total = 4096 * PAGE_SIZE;
121 
122 	ggtt->base.clear_range = nop_clear_range;
123 	ggtt->base.insert_page = mock_insert_page;
124 	ggtt->base.insert_entries = mock_insert_entries;
125 	ggtt->base.bind_vma = mock_bind_ggtt;
126 	ggtt->base.unbind_vma = mock_unbind_ggtt;
127 	ggtt->base.cleanup = mock_cleanup;
128 
129 	i915_address_space_init(&ggtt->base, i915, "global");
130 }
131 
132 void mock_fini_ggtt(struct drm_i915_private *i915)
133 {
134 	struct i915_ggtt *ggtt = &i915->ggtt;
135 
136 	i915_address_space_fini(&ggtt->base);
137 }
138