renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

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Diffstat (limited to 'tests/auth.c')

0 files changed, 0 insertions, 0 deletions

/* drmP.h -- Private header for Direct Rendering Manager -*- linux-c -*- * Created: Mon Jan 4 10:05:05 1999 by faith@precisioninsight.com * Revised: Mon Dec 6 16:06:49 1999 by faith@precisioninsight.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * 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 * PRECISION INSIGHT 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. * * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drmP.h,v 1.58 1999/08/30 13:05:00 faith Exp $ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drmP.h,v 1.2 1999/12/14 01:33:56 robin Exp $ * */ #ifndef _DRM_P_H_ #define _DRM_P_H_ #ifdef __KERNEL__ #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/wrapper.h> #include <linux/version.h> #include <asm/io.h> #include <asm/mman.h> #include <asm/uaccess.h> #ifdef CONFIG_MTRR #include <asm/mtrr.h> #endif #include "drm.h" #define DRM_DEBUG_CODE 2 /* Include debugging code (if > 1, then also include looping detection. */ #define DRM_DMA_HISTOGRAM 1 /* Make histogram of DMA latency. */ #define DRM_HASH_SIZE 16 /* Size of key hash table */ #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_BSZ 1024 /* Buffer size for /dev/drm? output */ #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_FLAG_NOCTX 0x02 #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 /* Backward compatibility section */ /* _PAGE_WT changed to _PAGE_PWT in 2.2.6 */ #ifndef _PAGE_PWT #define _PAGE_PWT _PAGE_WT #endif /* Wait queue declarations changed in 2.3.1 */ #ifndef DECLARE_WAITQUEUE #define DECLARE_WAITQUEUE(w,c) struct wait_queue w = { c, NULL } typedef struct wait_queue *wait_queue_head_t; #define init_waitqueue_head(q) *q = NULL; #endif /* _PAGE_4M changed to _PAGE_PSE in 2.3.23 */ #ifndef _PAGE_PSE #define _PAGE_PSE _PAGE_4M #endif /* vm_offset changed to vm_pgoff in 2.3.25 */ #if LINUX_VERSION_CODE < 0x020319 #define VM_OFFSET(vma) ((vma)->vm_offset) #else #define VM_OFFSET(vma) ((vma)->vm_pgoff << PAGE_SHIFT) #endif /* *_nopage return values defined in 2.3.26 */ #ifndef NOPAGE_SIGBUS #define NOPAGE_SIGBUS 0 #endif #ifndef NOPAGE_OOM #define NOPAGE_OOM 0 #endif /* Generic cmpxchg added in 2.3.x */ #if CPU != 386 #ifndef __HAVE_ARCH_CMPXCHG /* Include this here so that driver can be used with older kernels. */ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) { unsigned long prev; switch (size) { case 1: __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2" : "=a"(prev) : "q"(new), "m"(*__xg(ptr)), "0"(old) : "memory"); return prev; case 2: __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2" : "=a"(prev) : "q"(new), "m"(*__xg(ptr)), "0"(old) : "memory"); return prev; case 4: __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2" : "=a"(prev) : "q"(new), "m"(*__xg(ptr)), "0"(old) : "memory"); return prev; } return old; } #define cmpxchg(ptr,o,n) \ ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o), \ (unsigned long)(n),sizeof(*(ptr)))) #endif #else /* Compiling for a 386 proper... */ #error DRI not supported on Intel 80386 #endif /* Macros to make printk easier */ #define DRM_ERROR(fmt, arg...) \ printk(KERN_ERR "[" DRM_NAME ":" __FUNCTION__ "] *ERROR* " fmt , ##arg) #define DRM_MEM_ERROR(area, fmt, arg...) \ printk(KERN_ERR "[" DRM_NAME ":" __FUNCTION__ ":%s] *ERROR* " fmt , \ drm_mem_stats[area].name , ##arg) #define DRM_INFO(fmt, arg...) printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg) #if DRM_DEBUG_CODE #define DRM_DEBUG(fmt, arg...) \ do { \ if (drm_flags&DRM_FLAG_DEBUG) \ printk(KERN_DEBUG \ "[" DRM_NAME ":" __FUNCTION__ "] " fmt , \ ##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) return len; #define DRM_PROC_PRINT_RET(ret, fmt, arg...) \ len += sprintf(&buf[len], fmt , ##arg); \ if (len > DRM_PROC_LIMIT) { ret; return len; } /* Internal types and structures */ #define DRM_ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) #define DRM_MIN(a,b) ((a)<(b)?(a):(b)) #define DRM_MAX(a,b) ((a)>(b)?(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) typedef int drm_ioctl_t(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); typedef struct drm_ioctl_desc { drm_ioctl_t *func; int auth_needed; int root_only; } drm_ioctl_desc_t; typedef struct drm_devstate { pid_t owner; /* X server pid holding x_lock */ } drm_devstate_t; typedef struct drm_magic_entry { drm_magic_t magic; struct drm_file *priv; struct drm_magic_entry *next; } drm_magic_entry_t; typedef struct drm_magic_head { struct drm_magic_entry *head; struct drm_magic_entry *tail; } drm_magic_head_t; typedef struct drm_vma_entry { struct vm_area_struct *vma; struct drm_vma_entry *next; pid_t pid; } drm_vma_entry_t; typedef 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 */ 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 */ pid_t pid; /* PID of holding process */ 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 */ #if DRM_DMA_HISTOGRAM cycles_t time_queued; /* Queued to kernel DMA queue */ cycles_t time_dispatched; /* Dispatched to hardware */ cycles_t time_completed; /* Completed by hardware */ cycles_t time_freed; /* Back on freelist */ #endif } drm_buf_t; #if DRM_DMA_HISTOGRAM #define DRM_DMA_HISTOGRAM_SLOTS 9 #define DRM_DMA_HISTOGRAM_INITIAL 10 #define DRM_DMA_HISTOGRAM_NEXT(current) ((current)*10) typedef struct drm_histogram { atomic_t total; atomic_t queued_to_dispatched[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t dispatched_to_completed[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t completed_to_freed[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t queued_to_completed[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t queued_to_freed[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t dma[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t schedule[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t ctx[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t lacq[DRM_DMA_HISTOGRAM_SLOTS]; atomic_t lhld[DRM_DMA_HISTOGRAM_SLOTS]; } drm_histogram_t; #endif /* bufs is one longer than it has to be */ typedef struct drm_waitlist { int count; /* Number of possible buffers */ drm_buf_t **bufs; /* List of pointers to buffers */ drm_buf_t **rp; /* Read pointer */ drm_buf_t **wp; /* Write pointer */ drm_buf_t **end; /* End pointer */ spinlock_t read_lock; spinlock_t write_lock; } drm_waitlist_t; typedef struct drm_freelist { int initialized; /* Freelist in use */ atomic_t count; /* Number of free buffers */ drm_buf_t *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 */ } drm_freelist_t; typedef struct drm_buf_entry { int buf_size; int buf_count; drm_buf_t *buflist; int seg_count; int page_order; unsigned long *seglist; drm_freelist_t freelist; } drm_buf_entry_t; typedef struct drm_hw_lock { __volatile__ unsigned int lock; char padding[60]; /* Pad to cache line */ } drm_hw_lock_t; typedef struct drm_file { int authenticated; int minor; pid_t pid; uid_t uid; drm_magic_t magic; unsigned long ioctl_count; struct drm_file *next; struct drm_file *prev; struct drm_device *dev; } drm_file_t; typedef 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 */ atomic_t total_queued; /* Total queued statistic */ atomic_t total_flushed;/* Total flushes statistic */ atomic_t total_locks; /* Total locks statistics */ drm_ctx_flags_t flags; /* Context preserving and 2D-only */ drm_waitlist_t waitlist; /* Pending buffers */ wait_queue_head_t flush_queue; /* Processes waiting until flush */ } drm_queue_t; typedef struct drm_lock_data { drm_hw_lock_t *hw_lock; /* Hardware lock */ pid_t pid; /* PID of lock holder (0=kernel) */ wait_queue_head_t lock_queue; /* Queue of blocked processes */ unsigned long lock_time; /* Time of last lock in jiffies */ } drm_lock_data_t; typedef struct drm_device_dma { /* Performance Counters */ atomic_t total_prio; /* Total DRM_DMA_PRIORITY */ atomic_t total_bytes; /* Total bytes DMA'd */ atomic_t total_dmas; /* Total DMA buffers dispatched */ atomic_t total_missed_dma; /* Missed drm_do_dma */ atomic_t total_missed_lock; /* Missed lock in drm_do_dma */ atomic_t total_missed_free; /* Missed drm_free_this_buffer */ atomic_t total_missed_sched;/* Missed drm_dma_schedule */ atomic_t total_tried; /* Tried next_buffer */ atomic_t total_hit; /* Sent next_buffer */ atomic_t total_lost; /* Lost interrupt */ drm_buf_entry_t bufs[DRM_MAX_ORDER+1]; int buf_count; drm_buf_t **buflist; /* Vector of pointers info bufs */ int seg_count; int page_count; unsigned long *pagelist; unsigned long byte_count; /* DMA support */ drm_buf_t *this_buffer; /* Buffer being sent */ drm_buf_t *next_buffer; /* Selected buffer to send */ drm_queue_t *next_queue; /* Queue from which buffer selected*/ wait_queue_head_t waiting; /* Processes waiting on free bufs */ } drm_device_dma_t; typedef struct drm_device { const char *name; /* Simple driver name */ char *unique; /* Unique identifier: e.g., busid */ int unique_len; /* Length of unique field */ dev_t device; /* Device number for mknod */ char *devname; /* For /proc/interrupts */ int blocked; /* Blocked due to VC switch? */ struct proc_dir_entry *root; /* Root for this device's entries */ /* Locks */ spinlock_t count_lock; /* For inuse, open_count, buf_use */ struct semaphore struct_sem; /* For others */ /* 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 */ /* Performance Counters */ atomic_t total_open; atomic_t total_close; atomic_t total_ioctl; atomic_t total_irq; /* Total interruptions */ atomic_t total_ctx; /* Total context switches */ atomic_t total_locks; atomic_t total_unlocks; atomic_t total_contends; atomic_t total_sleeps; /* Authentication */ drm_file_t *file_first; drm_file_t *file_last; drm_magic_head_t magiclist[DRM_HASH_SIZE]; /* Memory management */ drm_map_t **maplist; /* Vector of pointers to regions */ int map_count; /* Number of mappable regions */ drm_vma_entry_t *vmalist; /* List of vmas (for debugging) */ drm_lock_data_t lock; /* Information on hardware lock */ /* 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 */ drm_queue_t **queuelist; /* Vector of pointers to DMA queues */ drm_device_dma_t *dma; /* Optional pointer for DMA support */ /* Context support */ int irq; /* Interrupt used by board */ __volatile__ int context_flag; /* Context swapping flag */ __volatile__ int interrupt_flag;/* Interruption handler flag */ __volatile__ int 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 tq_struct tq; cycles_t ctx_start; cycles_t lck_start; #if DRM_DMA_HISTOGRAM drm_histogram_t histo; #endif /* Callback to X server for context switch and for heavy-handed reset. */ char buf[DRM_BSZ]; /* Output buffer */ char *buf_rp; /* Read pointer */ char *buf_wp; /* Write pointer */ char *buf_end; /* End pointer */ 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 */ } drm_device_t; /* Internal function definitions */ /* Misc. support (init.c) */ extern int drm_flags; extern void drm_parse_options(char *s); /* Device support (fops.c) */ extern int drm_open_helper(struct inode *inode, struct file *filp, drm_device_t *dev); extern int drm_flush(struct file *filp); extern int drm_release(struct inode *inode, struct file *filp); extern int drm_fasync(int fd, struct file *filp, int on); extern ssize_t drm_read(struct file *filp, char *buf, size_t count, loff_t *off); extern int drm_write_string(drm_device_t *dev, const char *s); /* Mapping support (vm.c) */ #if LINUX_VERSION_CODE < 0x020317 extern unsigned long drm_vm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access); extern unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access); extern unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma, unsigned long address, int write_access); #else /* Return type changed in 2.3.23 */ extern struct page *drm_vm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access); extern struct page *drm_vm_shm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access); extern struct page *drm_vm_dma_nopage(struct vm_area_struct *vma, unsigned long address, int write_access); #endif extern void drm_vm_open(struct vm_area_struct *vma); extern void drm_vm_close(struct vm_area_struct *vma); extern int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma); extern int drm_mmap(struct file *filp, struct vm_area_struct *vma); /* Proc support (proc.c) */ extern int drm_proc_init(drm_device_t *dev); extern int drm_proc_cleanup(void); /* Memory management support (memory.c) */ extern void drm_mem_init(void); extern int drm_mem_info(char *buf, char **start, off_t offset, int len, int *eof, void *data); extern void *drm_alloc(size_t size, int area); extern void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area); extern char *drm_strdup(const char *s, int area); extern void drm_strfree(const char *s, int area); extern void drm_free(void *pt, 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 void *drm_ioremap(unsigned long offset, unsigned long size); extern void drm_ioremapfree(void *pt, unsigned long size); /* Buffer management support (bufs.c) */ extern int drm_order(unsigned long size); extern int drm_addmap(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_addbufs(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_infobufs(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_markbufs(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_freebufs(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); /* Buffer list management support (lists.c) */ extern int drm_waitlist_create(drm_waitlist_t *bl, int count); extern int drm_waitlist_destroy(drm_waitlist_t *bl); extern int drm_waitlist_put(drm_waitlist_t *bl, drm_buf_t *buf); extern drm_buf_t *drm_waitlist_get(drm_waitlist_t *bl); extern int drm_freelist_create(drm_freelist_t *bl, int count); extern int drm_freelist_destroy(drm_freelist_t *bl); extern int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf); extern drm_buf_t *drm_freelist_get(drm_freelist_t *bl, int block); /* DMA support (gen_dma.c) */ extern void drm_dma_setup(drm_device_t *dev); extern void drm_dma_takedown(drm_device_t *dev); extern void drm_free_buffer(drm_device_t *dev, drm_buf_t *buf); extern void drm_reclaim_buffers(drm_device_t *dev, pid_t pid); extern int drm_context_switch(drm_device_t *dev, int old, int new); extern int drm_context_switch_complete(drm_device_t *dev, int new); extern void drm_wakeup(drm_device_t *dev, drm_buf_t *buf); extern void drm_clear_next_buffer(drm_device_t *dev); extern int drm_select_queue(drm_device_t *dev, void (*wrapper)(unsigned long)); extern int drm_dma_enqueue(drm_device_t *dev, drm_dma_t *dma); extern int drm_dma_get_buffers(drm_device_t *dev, drm_dma_t *dma); #if DRM_DMA_HISTOGRAM extern int drm_histogram_slot(unsigned long count); extern void drm_histogram_compute(drm_device_t *dev, drm_buf_t *buf); #endif /* Misc. IOCTL support (ioctl.c) */ extern int drm_irq_busid(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_getunique(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_setunique(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); /* Context IOCTL support (context.c) */ extern int drm_resctx(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_addctx(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_modctx(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_getctx(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_switchctx(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_newctx(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_rmctx(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); /* Drawable IOCTL support (drawable.c) */ extern int drm_adddraw(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_rmdraw(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); /* Authentication IOCTL support (auth.c) */ extern int drm_add_magic(drm_device_t *dev, drm_file_t *priv, drm_magic_t magic); extern int drm_remove_magic(drm_device_t *dev, drm_magic_t magic); extern int drm_getmagic(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_authmagic(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); /* Locking IOCTL support (lock.c) */ extern int drm_block(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_unblock(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_lock_take(__volatile__ unsigned int *lock,


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