drm: Check for invalid cursor flags
[linux-2.6.git] / include / drm / drm_mm.h
1 /**************************************************************************
2  *
3  * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA.
4  * All Rights Reserved.
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12  * the following conditions:
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14  * The above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
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18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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28 /*
29  * Authors:
30  * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
31  */
32
33 #ifndef _DRM_MM_H_
34 #define _DRM_MM_H_
35
36 /*
37  * Generic range manager structs
38  */
39 #include <linux/list.h>
40 #ifdef CONFIG_DEBUG_FS
41 #include <linux/seq_file.h>
42 #endif
43
44 struct drm_mm_node {
45         struct list_head node_list;
46         struct list_head hole_stack;
47         unsigned hole_follows : 1;
48         unsigned scanned_block : 1;
49         unsigned scanned_prev_free : 1;
50         unsigned scanned_next_free : 1;
51         unsigned scanned_preceeds_hole : 1;
52         unsigned allocated : 1;
53         unsigned long start;
54         unsigned long size;
55         struct drm_mm *mm;
56 };
57
58 struct drm_mm {
59         /* List of all memory nodes that immediately precede a free hole. */
60         struct list_head hole_stack;
61         /* head_node.node_list is the list of all memory nodes, ordered
62          * according to the (increasing) start address of the memory node. */
63         struct drm_mm_node head_node;
64         struct list_head unused_nodes;
65         int num_unused;
66         spinlock_t unused_lock;
67         unsigned int scan_check_range : 1;
68         unsigned scan_alignment;
69         unsigned long scan_size;
70         unsigned long scan_hit_start;
71         unsigned scan_hit_size;
72         unsigned scanned_blocks;
73         unsigned long scan_start;
74         unsigned long scan_end;
75         struct drm_mm_node *prev_scanned_node;
76 };
77
78 static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
79 {
80         return node->allocated;
81 }
82
83 static inline bool drm_mm_initialized(struct drm_mm *mm)
84 {
85         return mm->hole_stack.next;
86 }
87 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
88                                                 &(mm)->head_node.node_list, \
89                                                 node_list)
90 #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \
91         for (entry = (mm)->prev_scanned_node, \
92                 next = entry ? list_entry(entry->node_list.next, \
93                         struct drm_mm_node, node_list) : NULL; \
94              entry != NULL; entry = next, \
95                 next = entry ? list_entry(entry->node_list.next, \
96                         struct drm_mm_node, node_list) : NULL) \
97 /*
98  * Basic range manager support (drm_mm.c)
99  */
100 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
101                                                     unsigned long size,
102                                                     unsigned alignment,
103                                                     int atomic);
104 extern struct drm_mm_node *drm_mm_get_block_range_generic(
105                                                 struct drm_mm_node *node,
106                                                 unsigned long size,
107                                                 unsigned alignment,
108                                                 unsigned long start,
109                                                 unsigned long end,
110                                                 int atomic);
111 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
112                                                    unsigned long size,
113                                                    unsigned alignment)
114 {
115         return drm_mm_get_block_generic(parent, size, alignment, 0);
116 }
117 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
118                                                           unsigned long size,
119                                                           unsigned alignment)
120 {
121         return drm_mm_get_block_generic(parent, size, alignment, 1);
122 }
123 static inline struct drm_mm_node *drm_mm_get_block_range(
124                                                 struct drm_mm_node *parent,
125                                                 unsigned long size,
126                                                 unsigned alignment,
127                                                 unsigned long start,
128                                                 unsigned long end)
129 {
130         return drm_mm_get_block_range_generic(parent, size, alignment,
131                                                 start, end, 0);
132 }
133 static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
134                                                 struct drm_mm_node *parent,
135                                                 unsigned long size,
136                                                 unsigned alignment,
137                                                 unsigned long start,
138                                                 unsigned long end)
139 {
140         return drm_mm_get_block_range_generic(parent, size, alignment,
141                                                 start, end, 1);
142 }
143 extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
144                               unsigned long size, unsigned alignment);
145 extern int drm_mm_insert_node_in_range(struct drm_mm *mm,
146                                        struct drm_mm_node *node,
147                                        unsigned long size, unsigned alignment,
148                                        unsigned long start, unsigned long end);
149 extern void drm_mm_put_block(struct drm_mm_node *cur);
150 extern void drm_mm_remove_node(struct drm_mm_node *node);
151 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
152 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
153                                               unsigned long size,
154                                               unsigned alignment,
155                                               int best_match);
156 extern struct drm_mm_node *drm_mm_search_free_in_range(
157                                                 const struct drm_mm *mm,
158                                                 unsigned long size,
159                                                 unsigned alignment,
160                                                 unsigned long start,
161                                                 unsigned long end,
162                                                 int best_match);
163 extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
164                        unsigned long size);
165 extern void drm_mm_takedown(struct drm_mm *mm);
166 extern int drm_mm_clean(struct drm_mm *mm);
167 extern int drm_mm_pre_get(struct drm_mm *mm);
168
169 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
170 {
171         return block->mm;
172 }
173
174 void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
175                       unsigned alignment);
176 void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size,
177                                  unsigned alignment,
178                                  unsigned long start,
179                                  unsigned long end);
180 int drm_mm_scan_add_block(struct drm_mm_node *node);
181 int drm_mm_scan_remove_block(struct drm_mm_node *node);
182
183 extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
184 #ifdef CONFIG_DEBUG_FS
185 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
186 #endif
187
188 #endif