aboutsummaryrefslogtreecommitdiff
path: root/include/drm/drm_mm.h
blob: 88591ef8fa24f0cf8653a278d6bed086279691f0 (plain)
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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
/**************************************************************************
 *
 * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *
 **************************************************************************/
/*
 * Authors:
 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
 */

#ifndef _DRM_MM_H_
#define _DRM_MM_H_

/*
 * Generic range manager structs
 */
#include <linux/list.h>
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>
#endif

struct drm_mm_node {
	struct list_head node_list;
	struct list_head hole_stack;
	unsigned hole_follows : 1;
	unsigned scanned_block : 1;
	unsigned scanned_prev_free : 1;
	unsigned scanned_next_free : 1;
	unsigned scanned_preceeds_hole : 1;
	unsigned allocated : 1;
	unsigned long color;
	unsigned long start;
	unsigned long size;
	struct drm_mm *mm;
};

struct drm_mm {
	/* List of all memory nodes that immediately precede a free hole. */
	struct list_head hole_stack;
	/* head_node.node_list is the list of all memory nodes, ordered
	 * according to the (increasing) start address of the memory node. */
	struct drm_mm_node head_node;
	struct list_head unused_nodes;
	int num_unused;
	spinlock_t unused_lock;
	unsigned int scan_check_range : 1;
	unsigned scan_alignment;
	unsigned long scan_color;
	unsigned long scan_size;
	unsigned long scan_hit_start;
	unsigned long scan_hit_end;
	unsigned scanned_blocks;
	unsigned long scan_start;
	unsigned long scan_end;
	struct drm_mm_node *prev_scanned_node;

	void (*color_adjust)(struct drm_mm_node *node, unsigned long color,
			     unsigned long *start, unsigned long *end);
};

static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
{
	return node->allocated;
}

static inline bool drm_mm_initialized(struct drm_mm *mm)
{
	return mm->hole_stack.next;
}

static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_node)
{
	return hole_node->start + hole_node->size;
}

static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node)
{
	BUG_ON(!hole_node->hole_follows);
	return __drm_mm_hole_node_start(hole_node);
}

static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node)
{
	return list_entry(hole_node->node_list.next,
			  struct drm_mm_node, node_list)->start;
}

static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
{
	return __drm_mm_hole_node_end(hole_node);
}

#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
						&(mm)->head_node.node_list, \
						node_list)
#define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \
	for (entry = (mm)->prev_scanned_node, \
		next = entry ? list_entry(entry->node_list.next, \
			struct drm_mm_node, node_list) : NULL; \
	     entry != NULL; entry = next, \
		next = entry ? list_entry(entry->node_list.next, \
			struct drm_mm_node, node_list) : NULL) \

/* Note that we need to unroll list_for_each_entry in order to inline
 * setting hole_start and hole_end on each iteration and keep the
 * macro sane.
 */
#define drm_mm_for_each_hole(entry, mm, hole_start, hole_end) \
	for (entry = list_entry((mm)->hole_stack.next, struct drm_mm_node, hole_stack); \
	     &entry->hole_stack != &(mm)->hole_stack ? \
	     hole_start = drm_mm_hole_node_start(entry), \
	     hole_end = drm_mm_hole_node_end(entry), \
	     1 : 0; \
	     entry = list_entry(entry->hole_stack.next, struct drm_mm_node, hole_stack))

/*
 * Basic range manager support (drm_mm.c)
 */
extern struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,
					       unsigned long start,
					       unsigned long size,
					       bool atomic);
extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
						    unsigned long size,
						    unsigned alignment,
						    unsigned long color,
						    int atomic);
extern struct drm_mm_node *drm_mm_get_block_range_generic(
						struct drm_mm_node *node,
						unsigned long size,
						unsigned alignment,
						unsigned long color,
						unsigned long start,
						unsigned long end,
						int atomic);
static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
						   unsigned long size,
						   unsigned alignment)
{
	return drm_mm_get_block_generic(parent, size, alignment, 0, 0);
}
static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
							  unsigned long size,
							  unsigned alignment)
{
	return drm_mm_get_block_generic(parent, size, alignment, 0, 1);
}
static inline struct drm_mm_node *drm_mm_get_block_range(
						struct drm_mm_node *parent,
						unsigned long size,
						unsigned alignment,
						unsigned long start,
						unsigned long end)
{
	return drm_mm_get_block_range_generic(parent, size, alignment, 0,
					      start, end, 0);
}
static inline struct drm_mm_node *drm_mm_get_color_block_range(
						struct drm_mm_node *parent,
						unsigned long size,
						unsigned alignment,
						unsigned long color,
						unsigned long start,
						unsigned long end)
{
	return drm_mm_get_block_range_generic(parent, size, alignment, color,
					      start, end, 0);
}
static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
						struct drm_mm_node *parent,
						unsigned long size,
						unsigned alignment,
						unsigned long start,
						unsigned long end)
{
	return drm_mm_get_block_range_generic(parent, size, alignment, 0,
						start, end, 1);
}

extern int drm_mm_insert_node(struct drm_mm *mm,
			      struct drm_mm_node *node,
			      unsigned long size,
			      unsigned alignment);
extern int drm_mm_insert_node_in_range(struct drm_mm *mm,
				       struct drm_mm_node *node,
				       unsigned long size,
				       unsigned alignment,
				       unsigned long start,
				       unsigned long end);
extern int drm_mm_insert_node_generic(struct drm_mm *mm,
				      struct drm_mm_node *node,
				      unsigned long size,
				      unsigned alignment,
				      unsigned long color);
extern int drm_mm_insert_node_in_range_generic(struct drm_mm *mm,
				       struct drm_mm_node *node,
				       unsigned long size,
				       unsigned alignment,
				       unsigned long color,
				       unsigned long start,
				       unsigned long end);
extern void drm_mm_put_block(struct drm_mm_node *cur);
extern void drm_mm_remove_node(struct drm_mm_node *node);
extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
						      unsigned long size,
						      unsigned alignment,
						      unsigned long color,
						      bool best_match);
extern struct drm_mm_node *drm_mm_search_free_in_range_generic(
						const struct drm_mm *mm,
						unsigned long size,
						unsigned alignment,
						unsigned long color,
						unsigned long start,
						unsigned long end,
						bool best_match);
static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
						     unsigned long size,
						     unsigned alignment,
						     bool best_match)
{
	return drm_mm_search_free_generic(mm,size, alignment, 0, best_match);
}
static inline  struct drm_mm_node *drm_mm_search_free_in_range(
						const struct drm_mm *mm,
						unsigned long size,
						unsigned alignment,
						unsigned long start,
						unsigned long end,
						bool best_match)
{
	return drm_mm_search_free_in_range_generic(mm, size, alignment, 0,
						   start, end, best_match);
}
static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm,
							   unsigned long size,
							   unsigned alignment,
							   unsigned long color,
							   bool best_match)
{
	return drm_mm_search_free_generic(mm,size, alignment, color, best_match);
}
static inline  struct drm_mm_node *drm_mm_search_free_in_range_color(
						const struct drm_mm *mm,
						unsigned long size,
						unsigned alignment,
						unsigned long color,
						unsigned long start,
						unsigned long end,
						bool best_match)
{
	return drm_mm_search_free_in_range_generic(mm, size, alignment, color,
						   start, end, best_match);
}
extern int drm_mm_init(struct drm_mm *mm,
		       unsigned long start,
		       unsigned long size);
extern void drm_mm_takedown(struct drm_mm *mm);
extern int drm_mm_clean(struct drm_mm *mm);
extern int drm_mm_pre_get(struct drm_mm *mm);

static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
{
	return block->mm;
}

void drm_mm_init_scan(struct drm_mm *mm,
		      unsigned long size,
		      unsigned alignment,
		      unsigned long color);
void drm_mm_init_scan_with_range(struct drm_mm *mm,
				 unsigned long size,
				 unsigned alignment,
				 unsigned long color,
				 unsigned long start,
				 unsigned long end);
int drm_mm_scan_add_block(struct drm_mm_node *node);
int drm_mm_scan_remove_block(struct drm_mm_node *node);

extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
#ifdef CONFIG_DEBUG_FS
int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
#endif

#endif