This source file includes following definitions.
- ttm_bo_man_get_node
- ttm_bo_man_put_node
- ttm_bo_man_init
- ttm_bo_man_takedown
- ttm_bo_man_debug
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32 #include <drm/ttm/ttm_module.h>
33 #include <drm/ttm/ttm_bo_driver.h>
34 #include <drm/ttm/ttm_placement.h>
35 #include <drm/drm_mm.h>
36 #include <linux/slab.h>
37 #include <linux/spinlock.h>
38 #include <linux/module.h>
39
40
41
42
43
44
45
46 struct ttm_range_manager {
47 struct drm_mm mm;
48 spinlock_t lock;
49 };
50
51 static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
52 struct ttm_buffer_object *bo,
53 const struct ttm_place *place,
54 struct ttm_mem_reg *mem)
55 {
56 struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
57 struct drm_mm *mm = &rman->mm;
58 struct drm_mm_node *node;
59 enum drm_mm_insert_mode mode;
60 unsigned long lpfn;
61 int ret;
62
63 lpfn = place->lpfn;
64 if (!lpfn)
65 lpfn = man->size;
66
67 node = kzalloc(sizeof(*node), GFP_KERNEL);
68 if (!node)
69 return -ENOMEM;
70
71 mode = DRM_MM_INSERT_BEST;
72 if (place->flags & TTM_PL_FLAG_TOPDOWN)
73 mode = DRM_MM_INSERT_HIGH;
74
75 spin_lock(&rman->lock);
76 ret = drm_mm_insert_node_in_range(mm, node,
77 mem->num_pages,
78 mem->page_alignment, 0,
79 place->fpfn, lpfn, mode);
80 spin_unlock(&rman->lock);
81
82 if (unlikely(ret)) {
83 kfree(node);
84 } else {
85 mem->mm_node = node;
86 mem->start = node->start;
87 }
88
89 return 0;
90 }
91
92 static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
93 struct ttm_mem_reg *mem)
94 {
95 struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
96
97 if (mem->mm_node) {
98 spin_lock(&rman->lock);
99 drm_mm_remove_node(mem->mm_node);
100 spin_unlock(&rman->lock);
101
102 kfree(mem->mm_node);
103 mem->mm_node = NULL;
104 }
105 }
106
107 static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
108 unsigned long p_size)
109 {
110 struct ttm_range_manager *rman;
111
112 rman = kzalloc(sizeof(*rman), GFP_KERNEL);
113 if (!rman)
114 return -ENOMEM;
115
116 drm_mm_init(&rman->mm, 0, p_size);
117 spin_lock_init(&rman->lock);
118 man->priv = rman;
119 return 0;
120 }
121
122 static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man)
123 {
124 struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
125 struct drm_mm *mm = &rman->mm;
126
127 spin_lock(&rman->lock);
128 if (drm_mm_clean(mm)) {
129 drm_mm_takedown(mm);
130 spin_unlock(&rman->lock);
131 kfree(rman);
132 man->priv = NULL;
133 return 0;
134 }
135 spin_unlock(&rman->lock);
136 return -EBUSY;
137 }
138
139 static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
140 struct drm_printer *printer)
141 {
142 struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
143
144 spin_lock(&rman->lock);
145 drm_mm_print(&rman->mm, printer);
146 spin_unlock(&rman->lock);
147 }
148
149 const struct ttm_mem_type_manager_func ttm_bo_manager_func = {
150 .init = ttm_bo_man_init,
151 .takedown = ttm_bo_man_takedown,
152 .get_node = ttm_bo_man_get_node,
153 .put_node = ttm_bo_man_put_node,
154 .debug = ttm_bo_man_debug
155 };
156 EXPORT_SYMBOL(ttm_bo_manager_func);