aboutsummaryrefslogtreecommitdiff
path: root/linux-core/drmP.h
blob: 3d30ec7dab537fca2368b75f5c80b37a91b05e68 (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
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
/**
 * \file drmP.h
 * Private header for Direct Rendering Manager
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 */

/*
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * 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, sublicense,
 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS 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.
 */

#ifndef _DRM_P_H_
#define _DRM_P_H_

#ifdef __KERNEL__
#ifdef __alpha__
/* add include of current.h so that "current" is defined
 * before static inline funcs in wait.h. Doing this so we
 * can build the DRM (part of PI DRI). 4/21/2000 S + B */
#include <asm/current.h>
#endif				/* __alpha__ */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/file.h>
#include <linux/pci.h>
#include <linux/version.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>	/* For (un)lock_kernel */
#include <linux/mm.h>
#include <linux/pagemap.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
#include <linux/mutex.h>
#endif
#if defined(__alpha__) || defined(__powerpc__)
#include <asm/pgtable.h>	/* For pte_wrprotect */
#endif
#include <asm/io.h>
#include <asm/mman.h>
#include <asm/uaccess.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
#include <asm/agp.h>
#include <linux/types.h>
#include <linux/agp_backend.h>
#endif
#include <linux/workqueue.h>
#include <linux/poll.h>
#include <asm/pgalloc.h>
#include "drm.h"
#include <linux/slab.h>
#include <linux/idr.h>

#define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
#define __OS_HAS_MTRR (defined(CONFIG_MTRR))

#include "drm_os_linux.h"
#include "drm_hashtab.h"

struct drm_file;

/* If you want the memory alloc debug functionality, change define below */
/* #define DEBUG_MEMORY */

/***********************************************************************/
/** \name DRM template customization defaults */
/*@{*/

/* driver capabilities and requirements mask */
#define DRIVER_USE_AGP     0x1
#define DRIVER_REQUIRE_AGP 0x2
#define DRIVER_USE_MTRR    0x4
#define DRIVER_PCI_DMA     0x8
#define DRIVER_SG          0x10
#define DRIVER_HAVE_DMA    0x20
#define DRIVER_HAVE_IRQ    0x40
#define DRIVER_IRQ_SHARED  0x80
#define DRIVER_IRQ_VBL     0x100
#define DRIVER_DMA_QUEUE   0x200
#define DRIVER_FB_DMA      0x400
#define DRIVER_IRQ_VBL2    0x800


/*@}*/

/***********************************************************************/
/** \name Begin the DRM... */
/*@{*/

#define DRM_DEBUG_CODE 2	  /**< Include debugging code if > 1, then
				     also include looping detection. */

#define DRM_MAGIC_HASH_ORDER  4 /**< Size of key hash table. Must be power of 2. */
#define DRM_KERNEL_CONTEXT    0	 /**< Change drm_resctx if changed */
#define DRM_RESERVED_CONTEXTS 1	 /**< Change drm_resctx if changed */
#define DRM_LOOPING_LIMIT     5000000
#define DRM_TIME_SLICE	      (HZ/20)  /**< Time slice for GLXContexts */
#define DRM_LOCK_SLICE	      1	/**< Time slice for lock, in jiffies */

#define DRM_FLAG_DEBUG	  0x01

#define DRM_MEM_DMA	   0
#define DRM_MEM_SAREA	   1
#define DRM_MEM_DRIVER	   2
#define DRM_MEM_MAGIC	   3
#define DRM_MEM_IOCTLS	   4
#define DRM_MEM_MAPS	   5
#define DRM_MEM_VMAS	   6
#define DRM_MEM_BUFS	   7
#define DRM_MEM_SEGS	   8
#define DRM_MEM_PAGES	   9
#define DRM_MEM_FILES	  10
#define DRM_MEM_QUEUES	  11
#define DRM_MEM_CMDS	  12
#define DRM_MEM_MAPPINGS  13
#define DRM_MEM_BUFLISTS  14
#define DRM_MEM_AGPLISTS  15
#define DRM_MEM_TOTALAGP  16
#define DRM_MEM_BOUNDAGP  17
#define DRM_MEM_CTXBITMAP 18
#define DRM_MEM_STUB      19
#define DRM_MEM_SGLISTS   20
#define DRM_MEM_CTXLIST   21
#define DRM_MEM_MM        22
#define DRM_MEM_HASHTAB   23
#define DRM_MEM_OBJECTS   24
#define DRM_MEM_FENCE     25
#define DRM_MEM_TTM       26
#define DRM_MEM_BUFOBJ    27

#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
#define DRM_MAP_HASH_OFFSET 0x10000000
#define DRM_MAP_HASH_ORDER 12
#define DRM_OBJECT_HASH_ORDER 12
#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1)
#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16)
#define DRM_MM_INIT_MAX_PAGES 256

/*@}*/

#include "drm_compat.h"

#include "drm_crtc.h"

/***********************************************************************/
/** \name Macros to make printk easier */
/*@{*/

/**
 * Error output.
 *
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_ERROR(fmt, arg...) \
	printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __FUNCTION__ , ##arg)

/**
 * Memory error output.
 *
 * \param area memory area where the error occurred.
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_MEM_ERROR(area, fmt, arg...) \
	printk(KERN_ERR "[" DRM_NAME ":%s:%s] *ERROR* " fmt , __FUNCTION__, \
	       drm_mem_stats[area].name , ##arg)
#define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)

/**
 * Debug output.
 *
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#if DRM_DEBUG_CODE
#define DRM_DEBUG(fmt, arg...)						\
	do {								\
		if ( drm_debug )						\
			printk(KERN_DEBUG				\
			       "[" DRM_NAME ":%s] " fmt ,		\
			       __FUNCTION__ , ##arg);			\
	} while (0)
#else
#define DRM_DEBUG(fmt, arg...)		 do { } while (0)
#endif

#define DRM_PROC_LIMIT (PAGE_SIZE-80)

#define DRM_PROC_PRINT(fmt, arg...)					\
   len += sprintf(&buf[len], fmt , ##arg);				\
   if (len > DRM_PROC_LIMIT) { *eof = 1; return len - offset; }

#define DRM_PROC_PRINT_RET(ret, fmt, arg...)				\
   len += sprintf(&buf[len], fmt , ##arg);				\
   if (len > DRM_PROC_LIMIT) { ret; *eof = 1; return len - offset; }

/*@}*/

/***********************************************************************/
/** \name Internal types and structures */
/*@{*/

#define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
#define DRM_MIN(a,b) min(a,b)
#define DRM_MAX(a,b) max(a,b)

#define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
#define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
#define DRM_WAITCOUNT(dev,idx) DRM_BUFCOUNT(&dev->queuelist[idx]->waitlist)

#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
/**
 * Get the private SAREA mapping.
 *
 * \param _dev DRM device.
 * \param _ctx context number.
 * \param _map output mapping.
 */
#define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {	\
	(_map) = (_dev)->context_sareas[_ctx];		\
} while(0)

/**
 * Test that the hardware lock is held by the caller, returning otherwise.
 *
 * \param dev DRM device.
 * \param file_priv DRM file private pointer of the caller.
 */
#define LOCK_TEST_WITH_RETURN( dev, file_priv )				\
do {									\
	if ( !_DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ) ||		\
	     dev->lock.file_priv != file_priv )	{			\
		DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
			   __FUNCTION__, _DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ),\
			   dev->lock.file_priv, file_priv );		\
		return -EINVAL;						\
	}								\
} while (0)

/**
 * Copy and IOCTL return string to user space
 */
#define DRM_COPY( name, value )						\
	len = strlen( value );						\
	if ( len > name##_len ) len = name##_len;			\
	name##_len = strlen( value );					\
	if ( len && name ) {						\
		if ( copy_to_user( name, value, len ) )			\
			return -EFAULT;					\
	}

struct drm_device;
struct drm_file;

/**
 * Ioctl function type.
 *
 * \param dev DRM device structure
 * \param data pointer to kernel-space stored data, copied in and out according
 *	       to ioctl description.
 * \param file_priv DRM file private pointer.
 */
typedef int drm_ioctl_t(struct drm_device *dev, void *data,
			struct drm_file *file_priv);

typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
			       unsigned long arg);

#define DRM_AUTH        0x1
#define DRM_MASTER      0x2
#define DRM_ROOT_ONLY   0x4

struct drm_ioctl_desc {
	unsigned int cmd;
	drm_ioctl_t *func;
	int flags;
};
/**
 * Creates a driver or general drm_ioctl_desc array entry for the given
 * ioctl, for use by drm_ioctl().
 */
#define DRM_IOCTL_DEF(ioctl, func, flags) \
	[DRM_IOCTL_NR(ioctl)] = {ioctl, func, flags}

struct drm_magic_entry {
	struct list_head head;
	struct drm_hash_item hash_item;
	struct drm_file *priv;
};

struct drm_vma_entry {
	struct list_head head;
	struct vm_area_struct *vma;
	pid_t pid;
};

/**
 * DMA buffer.
 */
struct drm_buf {
	int idx;		       /**< Index into master buflist */
	int total;		       /**< Buffer size */
	int order;		       /**< log-base-2(total) */
	int used;		       /**< Amount of buffer in use (for DMA) */
	unsigned long offset;	       /**< Byte offset (used internally) */
	void *address;		       /**< Address of buffer */
	unsigned long bus_address;     /**< Bus address of buffer */
	struct drm_buf *next;	       /**< Kernel-only: used for free list */
	__volatile__ int waiting;      /**< On kernel DMA queue */
	__volatile__ int pending;      /**< On hardware DMA queue */
	wait_queue_head_t dma_wait;    /**< Processes waiting */
	struct drm_file *file_priv;    /**< Private of holding file descr */
	int context;		       /**< Kernel queue for this buffer */
	int while_locked;	       /**< Dispatch this buffer while locked */
	enum {
		DRM_LIST_NONE = 0,
		DRM_LIST_FREE = 1,
		DRM_LIST_WAIT = 2,
		DRM_LIST_PEND = 3,
		DRM_LIST_PRIO = 4,
		DRM_LIST_RECLAIM = 5
	} list;			       /**< Which list we're on */

	int dev_priv_size;		/**< Size of buffer private storage */
	void *dev_private;		/**< Per-buffer private storage */
};

/** bufs is one longer than it has to be */
struct drm_waitlist {
	int count;			/**< Number of possible buffers */
	struct drm_buf **bufs;		/**< List of pointers to buffers */
	struct drm_buf **rp;			/**< Read pointer */
	struct drm_buf **wp;			/**< Write pointer */
	struct drm_buf **end;		/**< End pointer */
	spinlock_t read_lock;
	spinlock_t write_lock;
};

struct drm_freelist {
	int initialized;	       /**< Freelist in use */
	atomic_t count;		       /**< Number of free buffers */
	struct drm_buf *next;	       /**< End pointer */

	wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
	int low_mark;		       /**< Low water mark */
	int high_mark;		       /**< High water mark */
	atomic_t wfh;		       /**< If waiting for high mark */
	spinlock_t lock;
};

typedef struct drm_dma_handle {
	dma_addr_t busaddr;
	void *vaddr;
	size_t size;
} drm_dma_handle_t;

/**
 * Buffer entry.  There is one of this for each buffer size order.
 */
struct drm_buf_entry {
	int buf_size;			/**< size */
	int buf_count;			/**< number of buffers */
	struct drm_buf *buflist;		/**< buffer list */
	int seg_count;
	int page_order;
	struct drm_dma_handle **seglist;
	struct drm_freelist freelist;
};

/*
 * This should be small enough to allow the use of kmalloc for hash tables
 * instead of vmalloc.
 */

#define DRM_FILE_HASH_ORDER 8
enum drm_ref_type {
	_DRM_REF_USE=0,
	_DRM_REF_TYPE1,
	_DRM_NO_REF_TYPES
};


/** File private data */
struct drm_file {
	int authenticated;
	int master;
	int minor;
	pid_t pid;
	uid_t uid;
	drm_magic_t magic;
	unsigned long ioctl_count;
	struct list_head lhead;
	struct drm_head *head;
	int remove_auth_on_close;
	unsigned long lock_count;

	/*
	 * The user object hash table is global and resides in the
	 * drm_device structure. We protect the lists and hash tables with the
	 * device struct_mutex. A bit coarse-grained but probably the best
	 * option.
	 */

	struct list_head refd_objects;

	struct drm_open_hash refd_object_hash[_DRM_NO_REF_TYPES];
	struct file *filp;
	void *driver_priv;

	struct list_head fbs;
};

/** Wait queue */
struct drm_queue {
	atomic_t use_count;		/**< Outstanding uses (+1) */
	atomic_t finalization;		/**< Finalization in progress */
	atomic_t block_count;		/**< Count of processes waiting */
	atomic_t block_read;		/**< Queue blocked for reads */
	wait_queue_head_t read_queue;	/**< Processes waiting on block_read */
	atomic_t block_write;		/**< Queue blocked for writes */
	wait_queue_head_t write_queue;	/**< Processes waiting on block_write */
#if 1
	atomic_t total_queued;		/**< Total queued statistic */
	atomic_t total_flushed;		/**< Total flushes statistic */
	atomic_t total_locks;		/**< Total locks statistics */
#endif
	enum drm_ctx_flags flags;	/**< Context preserving and 2D-only */
	struct drm_waitlist waitlist;	/**< Pending buffers */
	wait_queue_head_t flush_queue;	/**< Processes waiting until flush */
};

/**
 * Lock data.
 */
struct drm_lock_data {
	struct drm_hw_lock *hw_lock;		/**< Hardware lock */
	/** Private of lock holder's file (NULL=kernel) */
	struct drm_file *file_priv;
	wait_queue_head_t lock_queue;	/**< Queue of blocked processes */
	unsigned long lock_time;	/**< Time of last lock in jiffies */
	spinlock_t spinlock;
	uint32_t kernel_waiters;
	uint32_t user_waiters;
	int idle_has_lock;
};

/**
 * DMA data.
 */
struct drm_device_dma {

	struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];	/**< buffers, grouped by their size order */
	int buf_count;			/**< total number of buffers */
	struct drm_buf **buflist;		/**< Vector of pointers into drm_device_dma::bufs */
	int seg_count;
	int page_count;			/**< number of pages */
	unsigned long *pagelist;	/**< page list */
	unsigned long byte_count;
	enum {
		_DRM_DMA_USE_AGP = 0x01,
		_DRM_DMA_USE_SG = 0x02,
		_DRM_DMA_USE_FB = 0x04,
		_DRM_DMA_USE_PCI_RO = 0x08
	} flags;

};

/**
 * AGP memory entry.  Stored as a doubly linked list.
 */
struct drm_agp_mem {
	unsigned long handle;		/**< handle */
	DRM_AGP_MEM *memory;
	unsigned long bound;		/**< address */
	int pages;
	struct list_head head;
};

/**
 * AGP data.
 *
 * \sa drm_agp_init)() and drm_device::agp.
 */
struct drm_agp_head {
	DRM_AGP_KERN agp_info;		/**< AGP device information */
	struct list_head memory;
	unsigned long mode;		/**< AGP mode */
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,11)
	struct agp_bridge_data  *bridge;
#endif
	int enabled;			/**< whether the AGP bus as been enabled */
	int acquired;			/**< whether the AGP device has been acquired */
	unsigned long base;
	int agp_mtrr;
	int cant_use_aperture;
	unsigned long page_mask;
};

/**
 * Scatter-gather memory.
 */
struct drm_sg_mem {
	unsigned long handle;
	void *virtual;
	int pages;
	struct page **pagelist;
	dma_addr_t *busaddr;
};

struct drm_sigdata {
	int context;
	struct drm_hw_lock *lock;
};


/*
 * Generic memory manager structs
 */

struct drm_mm_node {
	struct list_head fl_entry;
	struct list_head ml_entry;
	int free;
	unsigned long start;
	unsigned long size;
	struct drm_mm *mm;
	void *private;
};

struct drm_mm {
	struct list_head fl_entry;
	struct list_head ml_entry;
};


/**
 * Mappings list
 */
struct drm_map_list {
	struct list_head head;		/**< list head */
	struct drm_hash_item hash;
	struct drm_map *map;			/**< mapping */
	uint64_t user_token;
	struct drm_mm_node *file_offset_node;
};

typedef struct drm_map drm_local_map_t;

/**
 * Context handle list
 */
struct drm_ctx_list {
	struct list_head head;		/**< list head */
	drm_context_t handle;		/**< context handle */
	struct drm_file *tag;		/**< associated fd private data */
};

struct drm_vbl_sig {
	struct list_head head;
	unsigned int sequence;
	struct siginfo info;
	struct task_struct *task;
};

/**
 * Drawable information.
 */
struct drm_drawable_info {
	unsigned int num_rects;
	struct drm_clip_rect *rects;
};


/* location of GART table */
#define DRM_ATI_GART_MAIN 1
#define DRM_ATI_GART_FB   2

#define DRM_ATI_GART_PCI 1
#define DRM_ATI_GART_PCIE 2
#define DRM_ATI_GART_IGP 3

struct ati_pcigart_info {
	int gart_table_location;
	int gart_reg_if;
	void *addr;
	dma_addr_t bus_addr;
	drm_local_map_t mapping;
	int table_size;
};

#include "drm_objects.h"

/**
 * DRM driver structure. This structure represent the common code for
 * a family of cards. There will one drm_device for each card present
 * in this family
 */

struct drm_driver {
	int (*load) (struct drm_device *, unsigned long flags);
	int (*firstopen) (struct drm_device *);
	int (*open) (struct drm_device *, struct drm_file *);
	void (*preclose) (struct drm_device *, struct drm_file *file_priv);
	void (*postclose) (struct drm_device *, struct drm_file *);
	void (*lastclose) (struct drm_device *);
	int (*unload) (struct drm_device *);
	int (*suspend) (struct drm_device *);
	int (*resume) (struct drm_device *);
	int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
	void (*dma_ready) (struct drm_device *);
	int (*dma_quiescent) (struct drm_device *);
	int (*context_ctor) (struct drm_device * dev, int context);
	int (*context_dtor) (struct drm_device * dev, int context);
	int (*kernel_context_switch) (struct drm_device * dev, int old,
				      int new);
	void (*kernel_context_switch_unlock) (struct drm_device * dev);
	int (*vblank_wait) (struct drm_device * dev, unsigned int *sequence);
	int (*vblank_wait2) (struct drm_device * dev, unsigned int *sequence);
	int (*dri_library_name) (struct drm_device * dev, char * buf);

	/**
	 * Called by \c drm_device_is_agp.  Typically used to determine if a
	 * card is really attached to AGP or not.
	 *
	 * \param dev  DRM device handle
	 *
	 * \returns
	 * One of three values is returned depending on whether or not the
	 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
	 * (return of 1), or may or may not be AGP (return of 2).
	 */
	int (*device_is_agp) (struct drm_device * dev);

/* these have to be filled in */
	 irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
	void (*irq_preinstall) (struct drm_device * dev);
	void (*irq_postinstall) (struct drm_device * dev);
	void (*irq_uninstall) (struct drm_device * dev);
	void (*reclaim_buffers) (struct drm_device *dev,
				 struct drm_file *file_priv);
	void (*reclaim_buffers_locked) (struct drm_device *dev,
					struct drm_file *file_priv);
	void (*reclaim_buffers_idlelocked) (struct drm_device *dev,
					    struct drm_file *file_priv);
	unsigned long (*get_map_ofs) (struct drm_map * map);
	unsigned long (*get_reg_ofs) (struct drm_device * dev);
	void (*set_version) (struct drm_device * dev, struct drm_set_version * sv);

	/* FB routines, if present */
	int (*fb_probe)(struct drm_device *dev, struct drm_crtc *crtc);
	int (*fb_remove)(struct drm_device *dev, struct drm_crtc *crtc);

	struct drm_fence_driver *fence_driver;
	struct drm_bo_driver *bo_driver;

	int major;
	int minor;
	int patchlevel;
	char *name;
	char *desc;
	char *date;

/* variables */
	u32 driver_features;
	int dev_priv_size;
	struct drm_ioctl_desc *ioctls;
	int num_ioctls;
	struct file_operations fops;
	struct pci_driver pci_driver;
};

/**
 * DRM head structure. This structure represent a video head on a card
 * that may contain multiple heads. Embed one per head of these in the
 * private drm_device structure.
 */
struct drm_head {
	int minor;			/**< Minor device number */
	struct drm_device *dev;
	struct proc_dir_entry *dev_root;  /**< proc directory entry */
	dev_t device;			/**< Device number for mknod */
	struct class_device *dev_class;
};


/**
 * DRM device structure. This structure represent a complete card that
 * may contain multiple heads.
 */
struct drm_device {
	struct device dev;		/**< Linux device */
	char *unique;			/**< Unique identifier: e.g., busid */
	int unique_len;			/**< Length of unique field */
	char *devname;			/**< For /proc/interrupts */
	int if_version;			/**< Highest interface version set */

	int blocked;			/**< Blocked due to VC switch? */

	/** \name Locks */
	/*@{ */
	spinlock_t count_lock;		/**< For inuse, drm_device::open_count, drm_device::buf_use */
	struct mutex struct_mutex;	/**< For others */
	/*@} */

	/** \name Usage Counters */
	/*@{ */
	int open_count;			/**< Outstanding files open */
	atomic_t ioctl_count;		/**< Outstanding IOCTLs pending */
	atomic_t vma_count;		/**< Outstanding vma areas open */
	int buf_use;			/**< Buffers in use -- cannot alloc */
	atomic_t buf_alloc;		/**< Buffer allocation in progress */
	/*@} */

	/** \name Performance counters */
	/*@{ */
	unsigned long counters;
	enum drm_stat_type types[15];
	atomic_t counts[15];
	/*@} */

	/** \name Authentication */
	/*@{ */
	struct list_head filelist;
	struct drm_open_hash magiclist;
	struct list_head magicfree;
	/*@} */

	/** \name Memory management */
	/*@{ */
	struct list_head maplist;	/**< Linked list of regions */
	int map_count;			/**< Number of mappable regions */
	struct drm_open_hash map_hash;       /**< User token hash table for maps */
	struct drm_mm offset_manager;        /**< User token manager */
	struct drm_open_hash object_hash;    /**< User token hash table for objects */
	struct address_space *dev_mapping;  /**< For unmap_mapping_range() */
	struct page *ttm_dummy_page;

	/** \name Context handle management */
	/*@{ */
	struct list_head ctxlist;	/**< Linked list of context handles */
	int ctx_count;			/**< Number of context handles */
	struct mutex ctxlist_mutex;	/**< For ctxlist */

	struct idr ctx_idr;

	struct list_head vmalist;	/**< List of vmas (for debugging) */
	struct drm_lock_data lock;		/**< Information on hardware lock */
	/*@} */

	/** \name DMA queues (contexts) */
	/*@{ */
	int queue_count;		/**< Number of active DMA queues */
	int queue_reserved;		/**< Number of reserved DMA queues */
	int queue_slots;		/**< Actual length of queuelist */
	struct drm_queue **queuelist;	/**< Vector of pointers to DMA queues */
	struct drm_device_dma *dma;		/**< Optional pointer for DMA support */
	/*@} */

	/** \name Context support */
	/*@{ */
	int irq;			/**< Interrupt used by board */
	int irq_enabled;		/**< True if irq handler is enabled */
	__volatile__ long context_flag;	/**< Context swapping flag */
	__volatile__ long interrupt_flag; /**< Interruption handler flag */
	__volatile__ long dma_flag;	/**< DMA dispatch flag */
	struct timer_list timer;	/**< Timer for delaying ctx switch */
	wait_queue_head_t context_wait;	/**< Processes waiting on ctx switch */
	int last_checked;		/**< Last context checked for DMA */
	int last_context;		/**< Last current context */
	unsigned long last_switch;	/**< jiffies at last context switch */
	/*@} */

	struct work_struct work;

	/** \name VBLANK IRQ support */
	/*@{ */

	wait_queue_head_t vbl_queue;	/**< VBLANK wait queue */
	atomic_t vbl_received;
	atomic_t vbl_received2;		/**< number of secondary VBLANK interrupts */
	spinlock_t vbl_lock;
	struct list_head vbl_sigs;		/**< signal list to send on VBLANK */
	struct list_head vbl_sigs2;	/**< signals to send on secondary VBLANK */
	unsigned int vbl_pending;
	spinlock_t tasklet_lock;	/**< For drm_locked_tasklet */
	void (*locked_tasklet_func)(struct drm_device *dev);

	/*@} */
	cycles_t ctx_start;
	cycles_t lck_start;

	struct fasync_struct *buf_async;/**< Processes waiting for SIGIO */
	wait_queue_head_t buf_readers;	/**< Processes waiting to read */
	wait_queue_head_t buf_writers;	/**< Processes waiting to ctx switch */

	struct drm_agp_head *agp;		/**< AGP data */

	struct pci_dev *pdev;		/**< PCI device structure */
	int pci_vendor;			/**< PCI vendor id */
	int pci_device;			/**< PCI device id */
#ifdef __alpha__
	struct pci_controller *hose;
#endif
	struct drm_sg_mem *sg;		/**< Scatter gather memory */
	void *dev_private;		/**< device private data */
	struct drm_sigdata sigdata;		/**< For block_all_signals */
	sigset_t sigmask;

	struct drm_driver *driver;
	drm_local_map_t *agp_buffer_map;
	unsigned int agp_buffer_token;
	struct drm_head primary;		/**< primary screen head */

	struct drm_fence_manager fm;
	struct drm_buffer_manager bm;

	/** \name Drawable information */
	/*@{ */
	spinlock_t drw_lock;
	struct idr drw_idr;
	/*@} */

	/* DRM mode setting */
	struct drm_mode_config mode_config;
};

#if __OS_HAS_AGP
struct drm_agp_ttm_backend {
	struct drm_ttm_backend backend;
	DRM_AGP_MEM *mem;
	struct agp_bridge_data *bridge;
	int populated;
};
#endif

typedef struct ati_pcigart_ttm_backend {
	struct drm_ttm_backend backend;
	int populated;
	void (*gart_flush_fn)(struct drm_device *dev);
	struct ati_pcigart_info *gart_info;
	unsigned long offset;
	struct page **pages;
	int num_pages;
	int bound;
	struct drm_device *dev;
} ati_pcigart_ttm_backend_t;

static __inline__ int drm_core_check_feature(struct drm_device *dev,
					     int feature)
{
	return ((dev->driver->driver_features & feature) ? 1 : 0);
}

#ifdef __alpha__
#define drm_get_pci_domain(dev) dev->hose->index
#else
#define drm_get_pci_domain(dev) 0
#endif

#if __OS_HAS_AGP
static inline int drm_core_has_AGP(struct drm_device *dev)
{
	return drm_core_check_feature(dev, DRIVER_USE_AGP);
}
#else
#define drm_core_has_AGP(dev) (0)
#endif

#if __OS_HAS_MTRR
static inline int drm_core_has_MTRR(struct drm_device *dev)
{
	return drm_core_check_feature(dev, DRIVER_USE_MTRR);
}

#define DRM_MTRR_WC		MTRR_TYPE_WRCOMB

static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
			       unsigned int flags)
{
	return mtrr_add(offset, size, flags, 1);
}

static inline int drm_mtrr_del(int handle, unsigned long offset,
			       unsigned long size, unsigned int flags)
{
	return mtrr_del(handle, offset, size);
}

#else
static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
			       unsigned int flags)
{
	return -ENODEV;
}

static inline int drm_mtrr_del(int handle, unsigned long offset,
			       unsigned long size, unsigned int flags)
{
	return -ENODEV;
}

#define drm_core_has_MTRR(dev) (0)
#define DRM_MTRR_WC		0
#endif


/******************************************************************/
/** \name Internal function definitions */
/*@{*/

				/* Driver support (drm_drv.h) */
extern int drm_fb_loaded;
extern int drm_init(struct drm_driver *driver,
			      struct pci_device_id *pciidlist);
extern void drm_exit(struct drm_driver *driver);
extern void drm_cleanup_pci(struct pci_dev *pdev);
extern int drm_ioctl(struct inode *inode, struct file *filp,
		     unsigned int cmd, unsigned long arg);
extern long drm_unlocked_ioctl(struct file *filp,
			       unsigned int cmd, unsigned long arg);
extern long drm_compat_ioctl(struct file *filp,
			     unsigned int cmd, unsigned long arg);

extern int drm_lastclose(struct drm_device *dev);

				/* Device support (drm_fops.h) */
extern int drm_open(struct inode *inode, struct file *filp);
extern int drm_stub_open(struct inode *inode, struct file *filp);
extern int drm_fasync(int fd, struct file *filp, int on);
extern int drm_release(struct inode *inode, struct file *filp);
unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);

				/* Mapping support (drm_vm.h) */
extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
extern unsigned long drm_core_get_map_ofs(struct drm_map * map);
extern unsigned long drm_core_get_reg_ofs(struct drm_device *dev);
extern pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma);

				/* Memory management support (drm_memory.h) */
#include "drm_memory.h"
extern void drm_mem_init(void);
extern int drm_mem_info(char *buf, char **start, off_t offset,
			int request, int *eof, void *data);
extern void *drm_calloc(size_t nmemb, size_t size, int area);
extern void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area);
extern unsigned long drm_alloc_pages(int order, int area);
extern void drm_free_pages(unsigned long address, int order, int area);
extern DRM_AGP_MEM *drm_alloc_agp(struct drm_device *dev, int pages, u32 type);
extern int drm_free_agp(DRM_AGP_MEM * handle, int pages);
extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
extern int drm_unbind_agp(DRM_AGP_MEM * handle);

extern void drm_free_memctl(size_t size);
extern int drm_alloc_memctl(size_t size);
extern void drm_query_memctl(uint64_t *cur_used,
			     uint64_t *low_threshold,
			     uint64_t *high_threshold);
extern void drm_init_memctl(size_t low_threshold,
			    size_t high_threshold,
			    size_t unit_size);

				/* Misc. IOCTL support (drm_ioctl.h) */
extern int drm_irq_by_busid(struct drm_device *dev, void *data,
			    struct drm_file *file_priv);
extern int drm_getunique(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_setunique(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_getmap(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_getclient(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_getstats(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_setversion(struct drm_device *dev, void *data,
			  struct drm_file *file_priv);
extern int drm_noop(struct drm_device *dev, void *data,
		    struct drm_file *file_priv);

				/* Context IOCTL support (drm_context.h) */
extern int drm_resctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_addctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_modctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_getctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_switchctx(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_newctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_rmctx(struct drm_device *dev, void *data,
		     struct drm_file *file_priv);

extern int drm_ctxbitmap_init(struct drm_device *dev);
extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);

extern int drm_setsareactx(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
extern int drm_getsareactx(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);

				/* Drawable IOCTL support (drm_drawable.h) */
extern int drm_adddraw(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
extern int drm_rmdraw(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_update_drawable_info(struct drm_device *dev, void *data,
				    struct drm_file *file_priv);
extern struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev,
						       drm_drawable_t id);
extern void drm_drawable_free_all(struct drm_device *dev);

				/* Authentication IOCTL support (drm_auth.h) */
extern int drm_getmagic(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_authmagic(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);

				/* Locking IOCTL support (drm_lock.h) */
extern int drm_lock(struct drm_device *dev, void *data,
		    struct drm_file *file_priv);
extern int drm_unlock(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context);
extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
extern void drm_idlelock_take(struct drm_lock_data *lock_data);
extern void drm_idlelock_release(struct drm_lock_data *lock_data);

/*
 * These are exported to drivers so that they can implement fencing using
 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
 */

extern int drm_i_have_hw_lock(struct drm_device *dev,
			      struct drm_file *file_priv);

				/* Buffer management support (drm_bufs.h) */
extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
extern int drm_addbufs_fb (struct drm_device *dev, struct drm_buf_desc * request);
extern int drm_addmap(struct drm_device *dev, unsigned int offset,
		      unsigned int size, enum drm_map_type type,
		      enum drm_map_flags flags, drm_local_map_t ** map_ptr);
extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
			    struct drm_file *file_priv);
extern int drm_rmmap(struct drm_device *dev, drm_local_map_t *map);
extern int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map);
extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
extern int drm_addbufs(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
extern int drm_infobufs(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_markbufs(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_freebufs(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_mapbufs(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
extern int drm_order(unsigned long size);
extern unsigned long drm_get_resource_start(struct drm_device *dev,
					    unsigned int resource);
extern unsigned long drm_get_resource_len(struct drm_device *dev,
					  unsigned int resource);
extern struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
						  drm_local_map_t *map);


				/* DMA support (drm_dma.h) */
extern int drm_dma_setup(struct drm_device *dev);
extern void drm_dma_takedown(struct drm_device *dev);
extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
extern void drm_core_reclaim_buffers(struct drm_device *dev,
				     struct drm_file *filp);

				/* IRQ support (drm_irq.h) */
extern int drm_control(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
extern irqreturn_t drm_irq_handler(DRM_IRQ_ARGS);
extern int drm_irq_install(struct drm_device *dev);
extern int drm_irq_uninstall(struct drm_device *dev);
extern void drm_driver_irq_preinstall(struct drm_device *dev);
extern void drm_driver_irq_postinstall(struct drm_device *dev);
extern void drm_driver_irq_uninstall(struct drm_device *dev);

extern int drm_wait_vblank(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
extern void drm_vbl_send_signals(struct drm_device *dev);
extern void drm_locked_tasklet(struct drm_device *dev, void(*func)(struct drm_device*));

				/* AGP/GART support (drm_agpsupport.h) */
extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
extern int drm_agp_acquire(struct drm_device *dev);
extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
				 struct drm_file *file_priv);
extern int drm_agp_release(struct drm_device *dev);
extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
				 struct drm_file *file_priv);
extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
				struct drm_file *file_priv);
extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
			  struct drm_file *file_priv);
extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
extern DRM_AGP_MEM *drm_agp_allocate_memory(size_t pages, u32 type);
#else
extern DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data *bridge, size_t pages, u32 type);
#endif
extern int drm_agp_free_memory(DRM_AGP_MEM * handle);
extern int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start);
extern int drm_agp_unbind_memory(DRM_AGP_MEM * handle);
extern struct drm_ttm_backend *drm_agp_init_ttm(struct drm_device *dev);
extern void drm_agp_chipset_flush(struct drm_device *dev);
				/* Stub support (drm_stub.h) */
extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
		     struct drm_driver *driver);
extern int drm_put_dev(struct drm_device *dev);
extern int drm_put_head(struct drm_head * head);
extern unsigned int drm_debug; /* 1 to enable debug output */
extern unsigned int drm_cards_limit;
extern struct drm_head **drm_heads;
extern struct class *drm_class;
extern struct proc_dir_entry *drm_proc_root;

extern drm_local_map_t *drm_getsarea(struct drm_device *dev);

				/* Proc support (drm_proc.h) */
extern int drm_proc_init(struct drm_device *dev,
			 int minor,
			 struct proc_dir_entry *root,
			 struct proc_dir_entry **dev_root);
extern int drm_proc_cleanup(int minor,
			    struct proc_dir_entry *root,
			    struct proc_dir_entry *dev_root);

				/* Scatter Gather Support (drm_scatter.h) */
extern void drm_sg_cleanup(struct drm_sg_mem * entry);
extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
extern int drm_sg_free(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);

			       /* ATI PCIGART support (ati_pcigart.h) */
extern int drm_ati_pcigart_init(struct drm_device *dev, struct ati_pcigart_info *gart_info);
extern int drm_ati_pcigart_cleanup(struct drm_device *dev, struct ati_pcigart_info *gart_info);
extern struct drm_ttm_backend *ati_pcigart_init_ttm(struct drm_device *dev, struct ati_pcigart_info *info, void (*gart_flush_fn)(struct drm_device *dev));

extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
			   size_t align, dma_addr_t maxaddr);
extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t *dmah);
extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t *dmah);

			       /* sysfs support (drm_sysfs.c) */
struct drm_sysfs_class;
extern struct class *drm_sysfs_create(struct module *owner, char *name);
extern void drm_sysfs_destroy(void);
extern int drm_sysfs_device_add(struct drm_device *dev, struct drm_head * head);
extern void drm_sysfs_device_remove(struct drm_device *dev);

/*
 * Basic memory manager support (drm_mm.c)
 */

extern struct drm_mm_node * drm_mm_get_block(struct drm_mm_node * parent, unsigned long size,
					       unsigned alignment);
extern void drm_mm_put_block(struct drm_mm_node *cur);
extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, unsigned long size,
						unsigned alignment, int 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 unsigned long drm_mm_tail_space(struct drm_mm *mm);
extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, unsigned long size);
extern int drm_mm_add_space_to_tail(struct drm_mm *mm, unsigned long size);

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

extern void drm_core_ioremap(struct drm_map *map, struct drm_device *dev);
extern void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev);

static __inline__ struct drm_map *drm_core_findmap(struct drm_device *dev,
						   unsigned int token)
{
	struct drm_map_list *_entry;
	list_for_each_entry(_entry, &dev->maplist, head)
		if (_entry->user_token == token)
			return _entry->map;
	return NULL;
}

static __inline__ int drm_device_is_agp(struct drm_device *dev)
{
	if ( dev->driver->device_is_agp != NULL ) {
		int err = (*dev->driver->device_is_agp)( dev );

		if (err != 2) {
			return err;
		}
	}

	return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
}

static __inline__ int drm_device_is_pcie(struct drm_device *dev)
{
	return pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
}

static __inline__ void drm_core_dropmap(struct drm_map *map)
{
}

#ifndef DEBUG_MEMORY
/** Wrapper around kmalloc() */
static __inline__ void *drm_alloc(size_t size, int area)
{
	return kmalloc(size, GFP_KERNEL);
}

/** Wrapper around kfree() */
static __inline__ void drm_free(void *pt, size_t size, int area)
{
	kfree(pt);
}
#else
extern void *drm_alloc(size_t size, int area);
extern void drm_free(void *pt, size_t size, int area);
#endif

/*
 * Accounting variants of standard calls.
 */

static inline void *drm_ctl_alloc(size_t size, int area)
{
	void *ret;
	if (drm_alloc_memctl(size))
		return NULL;
	ret = drm_alloc(size, area);
	if (!ret)
		drm_free_memctl(size);
	return ret;
}

static inline void *drm_ctl_calloc(size_t nmemb, size_t size, int area)
{
	void *ret;

	if (drm_alloc_memctl(nmemb*size))
		return NULL;
	ret = drm_calloc(nmemb, size, area);
	if (!ret)
		drm_free_memctl(nmemb*size);
	return ret;
}

static inline void drm_ctl_free(void *pt, size_t size, int area)
{
	drm_free(pt, size, area);
	drm_free_memctl(size);
}

/*@}*/

#endif				/* __KERNEL__ */
#endif