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1408 | serge | 1 | /************************************************************************** |
2 | * |
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3 | * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA. |
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4 | * All Rights Reserved. |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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7 | * copy of this software and associated documentation files (the |
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8 | * "Software"), to deal in the Software without restriction, including |
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9 | * without limitation the rights to use, copy, modify, merge, publish, |
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10 | * distribute, sub license, and/or sell copies of the Software, and to |
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11 | * permit persons to whom the Software is furnished to do so, subject to |
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12 | * the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice (including the |
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15 | * next paragraph) shall be included in all copies or substantial portions |
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16 | * of the Software. |
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17 | * |
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18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
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25 | * |
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26 | * |
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27 | **************************************************************************/ |
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28 | /* |
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29 | * Authors: |
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30 | * Thomas Hellstrom |
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31 | */ |
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32 | |||
33 | #ifndef _DRM_MM_H_ |
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34 | #define _DRM_MM_H_ |
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35 | |||
36 | /* |
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37 | * Generic range manager structs |
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38 | */ |
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39 | #include |
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40 | #ifdef CONFIG_DEBUG_FS |
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41 | #include |
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42 | #endif |
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43 | |||
44 | struct drm_mm_node { |
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1964 | serge | 45 | struct list_head node_list; |
46 | struct list_head hole_stack; |
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47 | unsigned hole_follows : 1; |
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48 | unsigned scanned_block : 1; |
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49 | unsigned scanned_prev_free : 1; |
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50 | unsigned scanned_next_free : 1; |
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51 | unsigned scanned_preceeds_hole : 1; |
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52 | unsigned allocated : 1; |
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3031 | serge | 53 | unsigned long color; |
1408 | serge | 54 | unsigned long start; |
55 | unsigned long size; |
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56 | struct drm_mm *mm; |
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57 | }; |
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58 | |||
59 | struct drm_mm { |
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1964 | serge | 60 | /* List of all memory nodes that immediately precede a free hole. */ |
61 | struct list_head hole_stack; |
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62 | /* head_node.node_list is the list of all memory nodes, ordered |
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63 | * according to the (increasing) start address of the memory node. */ |
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64 | struct drm_mm_node head_node; |
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1408 | serge | 65 | struct list_head unused_nodes; |
66 | int num_unused; |
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1964 | serge | 67 | spinlock_t unused_lock; |
68 | unsigned int scan_check_range : 1; |
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69 | unsigned scan_alignment; |
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3031 | serge | 70 | unsigned long scan_color; |
1964 | serge | 71 | unsigned long scan_size; |
72 | unsigned long scan_hit_start; |
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3192 | Serge | 73 | unsigned long scan_hit_end; |
1964 | serge | 74 | unsigned scanned_blocks; |
75 | unsigned long scan_start; |
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76 | unsigned long scan_end; |
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77 | struct drm_mm_node *prev_scanned_node; |
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3031 | serge | 78 | |
79 | void (*color_adjust)(struct drm_mm_node *node, unsigned long color, |
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80 | unsigned long *start, unsigned long *end); |
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1408 | serge | 81 | }; |
82 | |||
1964 | serge | 83 | static inline bool drm_mm_node_allocated(struct drm_mm_node *node) |
84 | { |
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85 | return node->allocated; |
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86 | } |
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87 | |||
88 | static inline bool drm_mm_initialized(struct drm_mm *mm) |
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89 | { |
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90 | return mm->hole_stack.next; |
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91 | } |
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3391 | Serge | 92 | |
93 | static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_node) |
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94 | { |
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95 | return hole_node->start + hole_node->size; |
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96 | } |
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97 | |||
98 | static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node) |
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99 | { |
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100 | BUG_ON(!hole_node->hole_follows); |
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101 | return __drm_mm_hole_node_start(hole_node); |
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102 | } |
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103 | |||
104 | static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node) |
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105 | { |
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106 | return list_entry(hole_node->node_list.next, |
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107 | struct drm_mm_node, node_list)->start; |
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108 | } |
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109 | |||
110 | static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node) |
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111 | { |
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112 | return __drm_mm_hole_node_end(hole_node); |
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113 | } |
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114 | |||
1964 | serge | 115 | #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ |
116 | &(mm)->head_node.node_list, \ |
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117 | node_list) |
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118 | #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ |
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119 | for (entry = (mm)->prev_scanned_node, \ |
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120 | next = entry ? list_entry(entry->node_list.next, \ |
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121 | struct drm_mm_node, node_list) : NULL; \ |
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122 | entry != NULL; entry = next, \ |
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123 | next = entry ? list_entry(entry->node_list.next, \ |
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124 | struct drm_mm_node, node_list) : NULL) \ |
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3391 | Serge | 125 | |
126 | /* Note that we need to unroll list_for_each_entry in order to inline |
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127 | * setting hole_start and hole_end on each iteration and keep the |
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128 | * macro sane. |
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129 | */ |
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130 | #define drm_mm_for_each_hole(entry, mm, hole_start, hole_end) \ |
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131 | for (entry = list_entry((mm)->hole_stack.next, struct drm_mm_node, hole_stack); \ |
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132 | &entry->hole_stack != &(mm)->hole_stack ? \ |
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133 | hole_start = drm_mm_hole_node_start(entry), \ |
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134 | hole_end = drm_mm_hole_node_end(entry), \ |
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135 | 1 : 0; \ |
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136 | entry = list_entry(entry->hole_stack.next, struct drm_mm_node, hole_stack)) |
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137 | |||
1408 | serge | 138 | /* |
139 | * Basic range manager support (drm_mm.c) |
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140 | */ |
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3391 | Serge | 141 | extern struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm, |
142 | unsigned long start, |
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143 | unsigned long size, |
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144 | bool atomic); |
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1408 | serge | 145 | extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, |
146 | unsigned long size, |
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147 | unsigned alignment, |
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3031 | serge | 148 | unsigned long color, |
1408 | serge | 149 | int atomic); |
150 | extern struct drm_mm_node *drm_mm_get_block_range_generic( |
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151 | struct drm_mm_node *node, |
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152 | unsigned long size, |
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153 | unsigned alignment, |
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3031 | serge | 154 | unsigned long color, |
1408 | serge | 155 | unsigned long start, |
156 | unsigned long end, |
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157 | int atomic); |
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158 | static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, |
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159 | unsigned long size, |
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160 | unsigned alignment) |
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161 | { |
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3031 | serge | 162 | return drm_mm_get_block_generic(parent, size, alignment, 0, 0); |
1408 | serge | 163 | } |
164 | static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, |
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165 | unsigned long size, |
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166 | unsigned alignment) |
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167 | { |
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3031 | serge | 168 | return drm_mm_get_block_generic(parent, size, alignment, 0, 1); |
1408 | serge | 169 | } |
170 | static inline struct drm_mm_node *drm_mm_get_block_range( |
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171 | struct drm_mm_node *parent, |
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172 | unsigned long size, |
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173 | unsigned alignment, |
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174 | unsigned long start, |
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175 | unsigned long end) |
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176 | { |
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3031 | serge | 177 | return drm_mm_get_block_range_generic(parent, size, alignment, 0, |
178 | start, end, 0); |
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179 | } |
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180 | static inline struct drm_mm_node *drm_mm_get_color_block_range( |
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181 | struct drm_mm_node *parent, |
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182 | unsigned long size, |
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183 | unsigned alignment, |
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184 | unsigned long color, |
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185 | unsigned long start, |
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186 | unsigned long end) |
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187 | { |
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188 | return drm_mm_get_block_range_generic(parent, size, alignment, color, |
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1408 | serge | 189 | start, end, 0); |
190 | } |
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191 | static inline struct drm_mm_node *drm_mm_get_block_atomic_range( |
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192 | struct drm_mm_node *parent, |
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193 | unsigned long size, |
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194 | unsigned alignment, |
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195 | unsigned long start, |
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196 | unsigned long end) |
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197 | { |
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3031 | serge | 198 | return drm_mm_get_block_range_generic(parent, size, alignment, 0, |
1408 | serge | 199 | start, end, 1); |
200 | } |
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3192 | Serge | 201 | |
202 | extern int drm_mm_insert_node(struct drm_mm *mm, |
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203 | struct drm_mm_node *node, |
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204 | unsigned long size, |
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205 | unsigned alignment); |
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1964 | serge | 206 | extern int drm_mm_insert_node_in_range(struct drm_mm *mm, |
207 | struct drm_mm_node *node, |
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3192 | Serge | 208 | unsigned long size, |
209 | unsigned alignment, |
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210 | unsigned long start, |
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211 | unsigned long end); |
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212 | extern int drm_mm_insert_node_generic(struct drm_mm *mm, |
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213 | struct drm_mm_node *node, |
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214 | unsigned long size, |
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215 | unsigned alignment, |
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216 | unsigned long color); |
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217 | extern int drm_mm_insert_node_in_range_generic(struct drm_mm *mm, |
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218 | struct drm_mm_node *node, |
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219 | unsigned long size, |
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220 | unsigned alignment, |
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221 | unsigned long color, |
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222 | unsigned long start, |
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223 | unsigned long end); |
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1408 | serge | 224 | extern void drm_mm_put_block(struct drm_mm_node *cur); |
1964 | serge | 225 | extern void drm_mm_remove_node(struct drm_mm_node *node); |
226 | extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); |
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3031 | serge | 227 | extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm, |
1408 | serge | 228 | unsigned long size, |
229 | unsigned alignment, |
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3031 | serge | 230 | unsigned long color, |
231 | bool best_match); |
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232 | extern struct drm_mm_node *drm_mm_search_free_in_range_generic( |
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1408 | serge | 233 | const struct drm_mm *mm, |
234 | unsigned long size, |
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235 | unsigned alignment, |
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3031 | serge | 236 | unsigned long color, |
1408 | serge | 237 | unsigned long start, |
238 | unsigned long end, |
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3031 | serge | 239 | bool best_match); |
240 | static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, |
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241 | unsigned long size, |
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242 | unsigned alignment, |
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243 | bool best_match) |
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244 | { |
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245 | return drm_mm_search_free_generic(mm,size, alignment, 0, best_match); |
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246 | } |
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247 | static inline struct drm_mm_node *drm_mm_search_free_in_range( |
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248 | const struct drm_mm *mm, |
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249 | unsigned long size, |
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250 | unsigned alignment, |
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251 | unsigned long start, |
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252 | unsigned long end, |
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253 | bool best_match) |
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254 | { |
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255 | return drm_mm_search_free_in_range_generic(mm, size, alignment, 0, |
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256 | start, end, best_match); |
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257 | } |
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258 | static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm, |
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259 | unsigned long size, |
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260 | unsigned alignment, |
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261 | unsigned long color, |
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262 | bool best_match) |
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263 | { |
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264 | return drm_mm_search_free_generic(mm,size, alignment, color, best_match); |
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265 | } |
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266 | static inline struct drm_mm_node *drm_mm_search_free_in_range_color( |
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267 | const struct drm_mm *mm, |
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268 | unsigned long size, |
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269 | unsigned alignment, |
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270 | unsigned long color, |
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271 | unsigned long start, |
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272 | unsigned long end, |
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273 | bool best_match) |
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274 | { |
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275 | return drm_mm_search_free_in_range_generic(mm, size, alignment, color, |
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276 | start, end, best_match); |
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277 | } |
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278 | extern int drm_mm_init(struct drm_mm *mm, |
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279 | unsigned long start, |
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1408 | serge | 280 | unsigned long size); |
281 | extern void drm_mm_takedown(struct drm_mm *mm); |
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282 | extern int drm_mm_clean(struct drm_mm *mm); |
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283 | extern int drm_mm_pre_get(struct drm_mm *mm); |
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284 | |||
285 | static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) |
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286 | { |
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287 | return block->mm; |
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288 | } |
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289 | |||
3031 | serge | 290 | void drm_mm_init_scan(struct drm_mm *mm, |
291 | unsigned long size, |
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1964 | serge | 292 | unsigned alignment, |
3031 | serge | 293 | unsigned long color); |
294 | void drm_mm_init_scan_with_range(struct drm_mm *mm, |
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295 | unsigned long size, |
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296 | unsigned alignment, |
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297 | unsigned long color, |
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1964 | serge | 298 | unsigned long start, |
299 | unsigned long end); |
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300 | int drm_mm_scan_add_block(struct drm_mm_node *node); |
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301 | int drm_mm_scan_remove_block(struct drm_mm_node *node); |
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302 | |||
1408 | serge | 303 | extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); |
304 | #ifdef CONFIG_DEBUG_FS |
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305 | int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); |
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306 | #endif |
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307 | |||
308 | #endif |