1 /**************************************************************************
3 * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
30 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
37 * Generic range manager structs
39 #include <linux/list.h>
40 #ifdef CONFIG_DEBUG_FS
41 #include <linux/seq_file.h>
45 struct list_head free_stack
;
46 struct list_head node_list
;
48 unsigned scanned_block
: 1;
49 unsigned scanned_prev_free
: 1;
50 unsigned scanned_next_free
: 1;
57 /* List of free memory blocks, most recently freed ordered. */
58 struct list_head free_stack
;
59 /* List of all memory nodes, ordered according to the (increasing) start
60 * address of the memory node. */
61 struct list_head node_list
;
62 struct list_head unused_nodes
;
64 spinlock_t unused_lock
;
65 unsigned int scan_check_range
: 1;
66 unsigned scan_alignment
;
67 unsigned long scan_size
;
68 unsigned long scan_hit_start
;
69 unsigned scan_hit_size
;
70 unsigned scanned_blocks
;
71 unsigned long scan_start
;
72 unsigned long scan_end
;
76 * Basic range manager support (drm_mm.c)
78 extern struct drm_mm_node
*drm_mm_get_block_generic(struct drm_mm_node
*node
,
82 extern struct drm_mm_node
*drm_mm_get_block_range_generic(
83 struct drm_mm_node
*node
,
89 static inline struct drm_mm_node
*drm_mm_get_block(struct drm_mm_node
*parent
,
93 return drm_mm_get_block_generic(parent
, size
, alignment
, 0);
95 static inline struct drm_mm_node
*drm_mm_get_block_atomic(struct drm_mm_node
*parent
,
99 return drm_mm_get_block_generic(parent
, size
, alignment
, 1);
101 static inline struct drm_mm_node
*drm_mm_get_block_range(
102 struct drm_mm_node
*parent
,
108 return drm_mm_get_block_range_generic(parent
, size
, alignment
,
111 static inline struct drm_mm_node
*drm_mm_get_block_atomic_range(
112 struct drm_mm_node
*parent
,
118 return drm_mm_get_block_range_generic(parent
, size
, alignment
,
121 extern void drm_mm_put_block(struct drm_mm_node
*cur
);
122 extern struct drm_mm_node
*drm_mm_search_free(const struct drm_mm
*mm
,
126 extern struct drm_mm_node
*drm_mm_search_free_in_range(
127 const struct drm_mm
*mm
,
133 extern int drm_mm_init(struct drm_mm
*mm
, unsigned long start
,
135 extern void drm_mm_takedown(struct drm_mm
*mm
);
136 extern int drm_mm_clean(struct drm_mm
*mm
);
137 extern unsigned long drm_mm_tail_space(struct drm_mm
*mm
);
138 extern int drm_mm_remove_space_from_tail(struct drm_mm
*mm
,
140 extern int drm_mm_add_space_to_tail(struct drm_mm
*mm
,
141 unsigned long size
, int atomic
);
142 extern int drm_mm_pre_get(struct drm_mm
*mm
);
144 static inline struct drm_mm
*drm_get_mm(struct drm_mm_node
*block
)
149 void drm_mm_init_scan(struct drm_mm
*mm
, unsigned long size
,
151 void drm_mm_init_scan_with_range(struct drm_mm
*mm
, unsigned long size
,
155 int drm_mm_scan_add_block(struct drm_mm_node
*node
);
156 int drm_mm_scan_remove_block(struct drm_mm_node
*node
);
158 extern void drm_mm_debug_table(struct drm_mm
*mm
, const char *prefix
);
159 #ifdef CONFIG_DEBUG_FS
160 int drm_mm_dump_table(struct seq_file
*m
, struct drm_mm
*mm
);
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