1 /* drmP.h -- Private header for Direct Rendering Manager -*- linux-c -*-
2 * Created: Mon Jan 4 10:05:05 1999 by faith@precisioninsight.com
3 * Revised: Fri Aug 20 13:04:33 1999 by faith@precisioninsight.com
5 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 * DEALINGS IN THE SOFTWARE.
27 * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/generic/drmP.h,v 1.58 1999/08/30 13:05:00 faith Exp $
28 * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/generic/drmP.h,v 1.2 1999/06/27 14:08:24 dawes Exp $
36 #include <linux/module.h>
37 #include <linux/kernel.h>
38 #include <linux/miscdevice.h>
40 #include <linux/proc_fs.h>
41 #include <linux/init.h>
42 #include <linux/file.h>
43 #include <linux/pci.h>
44 #include <linux/wrapper.h>
45 #include <linux/version.h>
48 #include <asm/uaccess.h>
54 #define DRM_DEBUG_CODE 2 /* Include debugging code (if > 1, then
55 also include looping detection. */
56 #define DRM_DMA_HISTOGRAM 1 /* Make histogram of DMA latency. */
58 #define DRM_HASH_SIZE 16 /* Size of key hash table */
59 #define DRM_KERNEL_CONTEXT 0 /* Change drm_resctx if changed */
60 #define DRM_RESERVED_CONTEXTS 1 /* Change drm_resctx if changed */
61 #define DRM_LOOPING_LIMIT 5000000
62 #define DRM_BSZ 1024 /* Buffer size for /dev/drm? output */
63 #define DRM_TIME_SLICE (HZ/20) /* Time slice for GLXContexts */
64 #define DRM_LOCK_SLICE 1 /* Time slice for lock, in jiffies */
66 #define DRM_FLAG_DEBUG 0x01
67 #define DRM_FLAG_NOCTX 0x02
70 #define DRM_MEM_SAREA 1
71 #define DRM_MEM_DRIVER 2
72 #define DRM_MEM_MAGIC 3
73 #define DRM_MEM_IOCTLS 4
74 #define DRM_MEM_MAPS 5
75 #define DRM_MEM_VMAS 6
76 #define DRM_MEM_BUFS 7
77 #define DRM_MEM_SEGS 8
78 #define DRM_MEM_PAGES 9
79 #define DRM_MEM_FILES 10
80 #define DRM_MEM_QUEUES 11
81 #define DRM_MEM_CMDS 12
82 #define DRM_MEM_MAPPINGS 13
83 #define DRM_MEM_BUFLISTS 14
85 /* Backward compatibility section */
87 /* The name of _PAGE_WT was changed to
88 _PAGE_PWT in Linux 2.2.6 */
89 #define _PAGE_PWT _PAGE_WT
91 /* Wait queue declarations changes in 2.3.1 */
92 #ifndef DECLARE_WAITQUEUE
93 #define DECLARE_WAITQUEUE(w,c) struct wait_queue w = { c, NULL }
94 typedef struct wait_queue
*wait_queue_head_t
;
95 #define init_waitqueue_head(q) *q = NULL;
98 #define __drm_dummy_lock(lock) (*(__volatile__ unsigned int *)lock)
99 #define _DRM_CAS(lock,old,new,__ret) \
101 int __dummy; /* Can't mark eax as clobbered */ \
102 __asm__ __volatile__( \
103 "lock ; cmpxchg %4,%1\n\t" \
106 "=m" (__drm_dummy_lock(lock)), \
114 /* Macros to make printk easier */
115 #define DRM_ERROR(fmt, arg...) \
116 printk(KERN_ERR "[" DRM_NAME ":" __FUNCTION__ "] *ERROR* " fmt , ##arg)
117 #define DRM_MEM_ERROR(area, fmt, arg...) \
118 printk(KERN_ERR "[" DRM_NAME ":" __FUNCTION__ ":%s] *ERROR* " fmt , \
119 drm_mem_stats[area].name , ##arg)
120 #define DRM_INFO(fmt, arg...) printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)
123 #define DRM_DEBUG(fmt, arg...) \
125 if (drm_flags&DRM_FLAG_DEBUG) \
127 "[" DRM_NAME ":" __FUNCTION__ "] " fmt , \
131 #define DRM_DEBUG(fmt, arg...) do { } while (0)
134 #define DRM_PROC_LIMIT (PAGE_SIZE-80)
136 #define DRM_PROC_PRINT(fmt, arg...) \
137 len += sprintf(&buf[len], fmt , ##arg); \
138 if (len > DRM_PROC_LIMIT) return len;
140 #define DRM_PROC_PRINT_RET(ret, fmt, arg...) \
141 len += sprintf(&buf[len], fmt , ##arg); \
142 if (len > DRM_PROC_LIMIT) { ret; return len; }
144 /* Internal types and structures */
145 #define DRM_ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
146 #define DRM_MIN(a,b) ((a)<(b)?(a):(b))
147 #define DRM_MAX(a,b) ((a)>(b)?(a):(b))
149 #define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
150 #define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
151 #define DRM_WAITCOUNT(dev,idx) DRM_BUFCOUNT(&dev->queuelist[idx]->waitlist)
153 typedef int drm_ioctl_t(struct inode
*inode
, struct file
*filp
,
154 unsigned int cmd
, unsigned long arg
);
156 typedef struct drm_ioctl_desc
{
162 typedef struct drm_devstate
{
163 pid_t owner
; /* X server pid holding x_lock */
167 typedef struct drm_magic_entry
{
169 struct drm_file
*priv
;
170 struct drm_magic_entry
*next
;
173 typedef struct drm_magic_head
{
174 struct drm_magic_entry
*head
;
175 struct drm_magic_entry
*tail
;
178 typedef struct drm_vma_entry
{
179 struct vm_area_struct
*vma
;
180 struct drm_vma_entry
*next
;
184 typedef struct drm_buf
{
185 int idx
; /* Index into master buflist */
186 int total
; /* Buffer size */
187 int order
; /* log-base-2(total) */
188 int used
; /* Amount of buffer in use (for DMA) */
189 unsigned long offset
; /* Byte offset (used internally) */
190 void *address
; /* Address of buffer */
191 struct drm_buf
*next
; /* Kernel-only: used for free list */
192 __volatile__
int waiting
; /* On kernel DMA queue */
193 __volatile__
int pending
; /* On hardware DMA queue */
194 wait_queue_head_t dma_wait
; /* Processes waiting */
195 pid_t pid
; /* PID of holding process */
196 int context
; /* Kernel queue for this buffer */
197 int while_locked
;/* Dispatch this buffer while locked */
205 } list
; /* Which list we're on */
206 #if DRM_DMA_HISTOGRAM
207 cycles_t time_queued
; /* Queued to kernel DMA queue */
208 cycles_t time_dispatched
; /* Dispatched to hardware */
209 cycles_t time_completed
; /* Completed by hardware */
210 cycles_t time_freed
; /* Back on freelist */
214 #if DRM_DMA_HISTOGRAM
215 #define DRM_DMA_HISTOGRAM_SLOTS 9
216 #define DRM_DMA_HISTOGRAM_INITIAL 10
217 #define DRM_DMA_HISTOGRAM_NEXT(current) ((current)*10)
218 typedef struct drm_histogram
{
221 atomic_t queued_to_dispatched
[DRM_DMA_HISTOGRAM_SLOTS
];
222 atomic_t dispatched_to_completed
[DRM_DMA_HISTOGRAM_SLOTS
];
223 atomic_t completed_to_freed
[DRM_DMA_HISTOGRAM_SLOTS
];
225 atomic_t queued_to_completed
[DRM_DMA_HISTOGRAM_SLOTS
];
226 atomic_t queued_to_freed
[DRM_DMA_HISTOGRAM_SLOTS
];
228 atomic_t dma
[DRM_DMA_HISTOGRAM_SLOTS
];
229 atomic_t schedule
[DRM_DMA_HISTOGRAM_SLOTS
];
230 atomic_t ctx
[DRM_DMA_HISTOGRAM_SLOTS
];
231 atomic_t lacq
[DRM_DMA_HISTOGRAM_SLOTS
];
232 atomic_t lhld
[DRM_DMA_HISTOGRAM_SLOTS
];
236 /* bufs is one longer than it has to be */
237 typedef struct drm_waitlist
{
238 int count
; /* Number of possible buffers */
239 drm_buf_t
**bufs
; /* List of pointers to buffers */
240 drm_buf_t
**rp
; /* Read pointer */
241 drm_buf_t
**wp
; /* Write pointer */
242 drm_buf_t
**end
; /* End pointer */
243 spinlock_t read_lock
;
244 spinlock_t write_lock
;
247 typedef struct drm_freelist
{
248 int initialized
; /* Freelist in use */
249 atomic_t count
; /* Number of free buffers */
250 drm_buf_t
*next
; /* End pointer */
252 wait_queue_head_t waiting
; /* Processes waiting on free bufs */
253 int low_mark
; /* Low water mark */
254 int high_mark
; /* High water mark */
255 atomic_t wfh
; /* If waiting for high mark */
258 typedef struct drm_buf_entry
{
264 unsigned long *seglist
;
266 drm_freelist_t freelist
;
269 typedef struct drm_hw_lock
{
270 __volatile__
unsigned int lock
;
271 char padding
[60]; /* Pad to cache line */
274 typedef struct drm_file
{
280 unsigned long ioctl_count
;
281 struct drm_file
*next
;
282 struct drm_file
*prev
;
283 struct drm_device
*dev
;
287 typedef struct drm_queue
{
288 atomic_t use_count
; /* Outstanding uses (+1) */
289 atomic_t finalization
; /* Finalization in progress */
290 atomic_t block_count
; /* Count of processes waiting */
291 atomic_t block_read
; /* Queue blocked for reads */
292 wait_queue_head_t read_queue
; /* Processes waiting on block_read */
293 atomic_t block_write
; /* Queue blocked for writes */
294 wait_queue_head_t write_queue
; /* Processes waiting on block_write */
295 atomic_t total_queued
; /* Total queued statistic */
296 atomic_t total_flushed
;/* Total flushes statistic */
297 atomic_t total_locks
; /* Total locks statistics */
298 drm_ctx_flags_t flags
; /* Context preserving and 2D-only */
299 drm_waitlist_t waitlist
; /* Pending buffers */
300 wait_queue_head_t flush_queue
; /* Processes waiting until flush */
303 typedef struct drm_lock_data
{
304 drm_hw_lock_t
*hw_lock
; /* Hardware lock */
305 pid_t pid
; /* PID of lock holder (0=kernel) */
306 wait_queue_head_t lock_queue
; /* Queue of blocked processes */
307 unsigned long lock_time
; /* Time of last lock in jiffies */
310 typedef struct drm_device_dma
{
311 /* Performance Counters */
312 atomic_t total_prio
; /* Total DRM_DMA_PRIORITY */
313 atomic_t total_bytes
; /* Total bytes DMA'd */
314 atomic_t total_dmas
; /* Total DMA buffers dispatched */
316 atomic_t total_missed_dma
; /* Missed drm_do_dma */
317 atomic_t total_missed_lock
; /* Missed lock in drm_do_dma */
318 atomic_t total_missed_free
; /* Missed drm_free_this_buffer */
319 atomic_t total_missed_sched
;/* Missed drm_dma_schedule */
321 atomic_t total_tried
; /* Tried next_buffer */
322 atomic_t total_hit
; /* Sent next_buffer */
323 atomic_t total_lost
; /* Lost interrupt */
325 drm_buf_entry_t bufs
[DRM_MAX_ORDER
+1];
327 drm_buf_t
**buflist
; /* Vector of pointers info bufs */
330 unsigned long *pagelist
;
331 unsigned long byte_count
;
334 drm_buf_t
*this_buffer
; /* Buffer being sent */
335 drm_buf_t
*next_buffer
; /* Selected buffer to send */
336 drm_queue_t
*next_queue
; /* Queue from which buffer selected*/
337 wait_queue_head_t waiting
; /* Processes waiting on free bufs */
340 typedef struct drm_device
{
341 const char *name
; /* Simple driver name */
342 char *unique
; /* Unique identifier: e.g., busid */
343 int unique_len
; /* Length of unique field */
344 dev_t device
; /* Device number for mknod */
345 char *devname
; /* For /proc/interrupts */
347 int blocked
; /* Blocked due to VC switch? */
348 struct proc_dir_entry
*root
; /* Root for this device's entries */
351 spinlock_t count_lock
; /* For inuse, open_count, buf_use */
352 struct semaphore struct_sem
; /* For others */
355 int open_count
; /* Outstanding files open */
356 atomic_t ioctl_count
; /* Outstanding IOCTLs pending */
357 atomic_t vma_count
; /* Outstanding vma areas open */
358 int buf_use
; /* Buffers in use -- cannot alloc */
359 atomic_t buf_alloc
; /* Buffer allocation in progress */
361 /* Performance Counters */
363 atomic_t total_close
;
364 atomic_t total_ioctl
;
365 atomic_t total_irq
; /* Total interruptions */
366 atomic_t total_ctx
; /* Total context switches */
368 atomic_t total_locks
;
369 atomic_t total_unlocks
;
370 atomic_t total_contends
;
371 atomic_t total_sleeps
;
374 drm_file_t
*file_first
;
375 drm_file_t
*file_last
;
376 drm_magic_head_t magiclist
[DRM_HASH_SIZE
];
378 /* Memory management */
379 drm_map_t
**maplist
; /* Vector of pointers to regions */
380 int map_count
; /* Number of mappable regions */
382 drm_vma_entry_t
*vmalist
; /* List of vmas (for debugging) */
383 drm_lock_data_t lock
; /* Information on hardware lock */
385 /* DMA queues (contexts) */
386 int queue_count
; /* Number of active DMA queues */
387 int queue_reserved
; /* Number of reserved DMA queues */
388 int queue_slots
; /* Actual length of queuelist */
389 drm_queue_t
**queuelist
; /* Vector of pointers to DMA queues */
390 drm_device_dma_t
*dma
; /* Optional pointer for DMA support */
392 /* Context support */
393 int irq
; /* Interrupt used by board */
394 __volatile__
int context_flag
; /* Context swapping flag */
395 __volatile__
int interrupt_flag
;/* Interruption handler flag */
396 __volatile__
int dma_flag
; /* DMA dispatch flag */
397 struct timer_list timer
; /* Timer for delaying ctx switch */
398 wait_queue_head_t context_wait
; /* Processes waiting on ctx switch */
399 int last_checked
; /* Last context checked for DMA */
400 int last_context
; /* Last current context */
401 unsigned long last_switch
; /* jiffies at last context switch */
405 #if DRM_DMA_HISTOGRAM
406 drm_histogram_t histo
;
409 /* Callback to X server for context switch
410 and for heavy-handed reset. */
411 char buf
[DRM_BSZ
]; /* Output buffer */
412 char *buf_rp
; /* Read pointer */
413 char *buf_wp
; /* Write pointer */
414 char *buf_end
; /* End pointer */
415 struct fasync_struct
*buf_async
;/* Processes waiting for SIGIO */
416 wait_queue_head_t buf_readers
; /* Processes waiting to read */
417 wait_queue_head_t buf_writers
; /* Processes waiting to ctx switch */
421 /* Internal function definitions */
423 /* Misc. support (init.c) */
424 extern int drm_flags
;
425 extern void drm_parse_options(char *s
);
428 /* Device support (fops.c) */
429 extern int drm_open_helper(struct inode
*inode
, struct file
*filp
,
431 extern int drm_flush(struct file
*filp
);
432 extern int drm_release(struct inode
*inode
, struct file
*filp
);
433 extern int drm_fasync(int fd
, struct file
*filp
, int on
);
434 extern ssize_t
drm_read(struct file
*filp
, char *buf
, size_t count
,
436 extern int drm_write_string(drm_device_t
*dev
, const char *s
);
438 /* Mapping support (vm.c) */
439 extern unsigned long drm_vm_nopage(struct vm_area_struct
*vma
,
440 unsigned long address
,
442 extern unsigned long drm_vm_shm_nopage(struct vm_area_struct
*vma
,
443 unsigned long address
,
445 extern unsigned long drm_vm_dma_nopage(struct vm_area_struct
*vma
,
446 unsigned long address
,
448 extern void drm_vm_open(struct vm_area_struct
*vma
);
449 extern void drm_vm_close(struct vm_area_struct
*vma
);
450 extern int drm_mmap_dma(struct file
*filp
,
451 struct vm_area_struct
*vma
);
452 extern int drm_mmap(struct file
*filp
, struct vm_area_struct
*vma
);
455 /* Proc support (proc.c) */
456 extern int drm_proc_init(drm_device_t
*dev
);
457 extern int drm_proc_cleanup(void);
459 /* Memory management support (memory.c) */
460 extern void drm_mem_init(void);
461 extern int drm_mem_info(char *buf
, char **start
, off_t offset
,
462 int len
, int *eof
, void *data
);
463 extern void *drm_alloc(size_t size
, int area
);
464 extern void *drm_realloc(void *oldpt
, size_t oldsize
, size_t size
,
466 extern char *drm_strdup(const char *s
, int area
);
467 extern void drm_strfree(const char *s
, int area
);
468 extern void drm_free(void *pt
, size_t size
, int area
);
469 extern unsigned long drm_alloc_pages(int order
, int area
);
470 extern void drm_free_pages(unsigned long address
, int order
,
472 extern void *drm_ioremap(unsigned long offset
, unsigned long size
);
473 extern void drm_ioremapfree(void *pt
, unsigned long size
);
475 /* Buffer management support (bufs.c) */
476 extern int drm_order(unsigned long size
);
477 extern int drm_addmap(struct inode
*inode
, struct file
*filp
,
478 unsigned int cmd
, unsigned long arg
);
479 extern int drm_addbufs(struct inode
*inode
, struct file
*filp
,
480 unsigned int cmd
, unsigned long arg
);
481 extern int drm_infobufs(struct inode
*inode
, struct file
*filp
,
482 unsigned int cmd
, unsigned long arg
);
483 extern int drm_markbufs(struct inode
*inode
, struct file
*filp
,
484 unsigned int cmd
, unsigned long arg
);
485 extern int drm_freebufs(struct inode
*inode
, struct file
*filp
,
486 unsigned int cmd
, unsigned long arg
);
487 extern int drm_mapbufs(struct inode
*inode
, struct file
*filp
,
488 unsigned int cmd
, unsigned long arg
);
491 /* Buffer list management support (lists.c) */
492 extern int drm_waitlist_create(drm_waitlist_t
*bl
, int count
);
493 extern int drm_waitlist_destroy(drm_waitlist_t
*bl
);
494 extern int drm_waitlist_put(drm_waitlist_t
*bl
, drm_buf_t
*buf
);
495 extern drm_buf_t
*drm_waitlist_get(drm_waitlist_t
*bl
);
497 extern int drm_freelist_create(drm_freelist_t
*bl
, int count
);
498 extern int drm_freelist_destroy(drm_freelist_t
*bl
);
499 extern int drm_freelist_put(drm_device_t
*dev
, drm_freelist_t
*bl
,
501 extern drm_buf_t
*drm_freelist_get(drm_freelist_t
*bl
, int block
);
503 /* DMA support (gen_dma.c) */
504 extern void drm_dma_setup(drm_device_t
*dev
);
505 extern void drm_dma_takedown(drm_device_t
*dev
);
506 extern void drm_free_buffer(drm_device_t
*dev
, drm_buf_t
*buf
);
507 extern void drm_reclaim_buffers(drm_device_t
*dev
, pid_t pid
);
508 extern int drm_context_switch(drm_device_t
*dev
, int old
, int new);
509 extern int drm_context_switch_complete(drm_device_t
*dev
, int new);
510 extern void drm_wakeup(drm_device_t
*dev
, drm_buf_t
*buf
);
511 extern void drm_clear_next_buffer(drm_device_t
*dev
);
512 extern int drm_select_queue(drm_device_t
*dev
,
513 void (*wrapper
)(unsigned long));
514 extern int drm_dma_enqueue(drm_device_t
*dev
, drm_dma_t
*dma
);
515 extern int drm_dma_get_buffers(drm_device_t
*dev
, drm_dma_t
*dma
);
516 #if DRM_DMA_HISTOGRAM
517 extern int drm_histogram_slot(unsigned long count
);
518 extern void drm_histogram_compute(drm_device_t
*dev
, drm_buf_t
*buf
);
522 /* Misc. IOCTL support (ioctl.c) */
523 extern int drm_irq_busid(struct inode
*inode
, struct file
*filp
,
524 unsigned int cmd
, unsigned long arg
);
525 extern int drm_getunique(struct inode
*inode
, struct file
*filp
,
526 unsigned int cmd
, unsigned long arg
);
527 extern int drm_setunique(struct inode
*inode
, struct file
*filp
,
528 unsigned int cmd
, unsigned long arg
);
531 /* Context IOCTL support (context.c) */
532 extern int drm_resctx(struct inode
*inode
, struct file
*filp
,
533 unsigned int cmd
, unsigned long arg
);
534 extern int drm_addctx(struct inode
*inode
, struct file
*filp
,
535 unsigned int cmd
, unsigned long arg
);
536 extern int drm_modctx(struct inode
*inode
, struct file
*filp
,
537 unsigned int cmd
, unsigned long arg
);
538 extern int drm_getctx(struct inode
*inode
, struct file
*filp
,
539 unsigned int cmd
, unsigned long arg
);
540 extern int drm_switchctx(struct inode
*inode
, struct file
*filp
,
541 unsigned int cmd
, unsigned long arg
);
542 extern int drm_newctx(struct inode
*inode
, struct file
*filp
,
543 unsigned int cmd
, unsigned long arg
);
544 extern int drm_rmctx(struct inode
*inode
, struct file
*filp
,
545 unsigned int cmd
, unsigned long arg
);
548 /* Drawable IOCTL support (drawable.c) */
549 extern int drm_adddraw(struct inode
*inode
, struct file
*filp
,
550 unsigned int cmd
, unsigned long arg
);
551 extern int drm_rmdraw(struct inode
*inode
, struct file
*filp
,
552 unsigned int cmd
, unsigned long arg
);
555 /* Authentication IOCTL support (auth.c) */
556 extern int drm_add_magic(drm_device_t
*dev
, drm_file_t
*priv
,
558 extern int drm_remove_magic(drm_device_t
*dev
, drm_magic_t magic
);
559 extern int drm_getmagic(struct inode
*inode
, struct file
*filp
,
560 unsigned int cmd
, unsigned long arg
);
561 extern int drm_authmagic(struct inode
*inode
, struct file
*filp
,
562 unsigned int cmd
, unsigned long arg
);
565 /* Locking IOCTL support (lock.c) */
566 extern int drm_block(struct inode
*inode
, struct file
*filp
,
567 unsigned int cmd
, unsigned long arg
);
568 extern int drm_unblock(struct inode
*inode
, struct file
*filp
,
569 unsigned int cmd
, unsigned long arg
);
570 extern int drm_lock_take(__volatile__
unsigned int *lock
,
571 unsigned int context
);
572 extern int drm_lock_transfer(__volatile__
unsigned int *lock
,
573 unsigned int context
);
574 extern int drm_lock_free(drm_device_t
*dev
,
575 __volatile__
unsigned int *lock
,
576 unsigned int context
);
577 extern int drm_finish(struct inode
*inode
, struct file
*filp
,
578 unsigned int cmd
, unsigned long arg
);
579 extern int drm_flush_unblock(drm_device_t
*dev
, int context
,
580 drm_lock_flags_t flags
);
581 extern int drm_flush_block_and_flush(drm_device_t
*dev
, int context
,
582 drm_lock_flags_t flags
);