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/* xf86drm.h -- OS-independent header for DRM user-level library interface
* Created: Tue Jan 5 08:17:23 1999 by faith@precisioninsight.com
* Revised: Sun Feb 13 23:46:21 2000 by kevin@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.
*
* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/xf86drm.h,v 1.7 2000/02/23 04:47:21 martin Exp $
*
*/
#ifndef _XF86DRM_H_
#define _XF86DRM_H_
#define DRM_ERR_NO_DEVICE (-1001)
#define DRM_ERR_NO_ACCESS (-1002)
#define DRM_ERR_NOT_ROOT (-1003)
#define DRM_ERR_INVALID (-1004)
#define DRM_ERR_NO_FD (-1005)
typedef unsigned long drmHandle, *drmHandlePtr; /* To mapped regions */
typedef unsigned int drmSize, *drmSizePtr; /* For mapped regions */
typedef void *drmAddress, **drmAddressPtr; /* For mapped regions */
typedef unsigned int drmContext, *drmContextPtr; /* GLXContext handle */
typedef unsigned int drmDrawable, *drmDrawablePtr; /* Unused */
typedef unsigned int drmMagic, *drmMagicPtr; /* Magic for auth */
typedef struct _drmVersion {
int version_major; /* Major version */
int version_minor; /* Minor version */
int version_patchlevel; /* Patch level */
int name_len; /* Length of name buffer */
char *name; /* Name of driver */
int date_len; /* Length of date buffer */
char *date; /* User-space buffer to hold date */
int desc_len; /* Length of desc buffer */
char *desc; /* User-space buffer to hold desc */
} drmVersion, *drmVersionPtr;
/* All of these enums *MUST* match with the
kernel implementation -- so do *NOT*
change them! (The drmlib implementation
will just copy the flags instead of
translating them.) */
typedef enum {
DRM_FRAME_BUFFER = 0, /* WC, no caching, no core dump */
DRM_REGISTERS = 1, /* no caching, no core dump */
DRM_SHM = 2, /* shared, cached */
DRM_AGP = 3 /* AGP/GART */
} drmMapType;
typedef enum {
DRM_RESTRICTED = 0x0001, /* Cannot be mapped to client-virtual */
DRM_READ_ONLY = 0x0002, /* Read-only in client-virtual */
DRM_LOCKED = 0x0004, /* Physical pages locked */
DRM_KERNEL = 0x0008, /* Kernel requires access */
DRM_WRITE_COMBINING = 0x0010, /* Use write-combining, if available */
DRM_CONTAINS_LOCK = 0x0020 /* SHM page that contains lock */
} drmMapFlags;
typedef enum { /* These values *MUST* match drm.h */
/* Flags for DMA buffer dispatch */
DRM_DMA_BLOCK = 0x01, /* Block until buffer dispatched. Note,
the buffer may not yet have been
processed by the hardware -- getting a
hardware lock with the hardware
quiescent will ensure that the buffer
has been processed. */
DRM_DMA_WHILE_LOCKED = 0x02, /* Dispatch while lock held */
DRM_DMA_PRIORITY = 0x04, /* High priority dispatch */
/* Flags for DMA buffer request */
DRM_DMA_WAIT = 0x10, /* Wait for free buffers */
DRM_DMA_SMALLER_OK = 0x20, /* Smaller-than-requested buffers ok */
DRM_DMA_LARGER_OK = 0x40 /* Larger-than-requested buffers ok */
} drmDMAFlags;
typedef enum {
DRM_PAGE_ALIGN = 0x01,
DRM_AGP_BUFFER = 0x02
} drmBufDescFlags;
typedef enum {
DRM_LOCK_READY = 0x01, /* Wait until hardware is ready for DMA */
DRM_LOCK_QUIESCENT = 0x02, /* Wait until hardware quiescent */
DRM_LOCK_FLUSH = 0x04, /* Flush this context's DMA queue first */
DRM_LOCK_FLUSH_ALL = 0x08, /* Flush all DMA queues first */
/* These *HALT* flags aren't supported yet
-- they will be used to support the
full-screen DGA-like mode. */
DRM_HALT_ALL_QUEUES = 0x10, /* Halt all current and future queues */
DRM_HALT_CUR_QUEUES = 0x20 /* Halt all current queues */
} drmLockFlags;
typedef enum {
DRM_CONTEXT_PRESERVED = 0x01, /* This context is preserved and
never swapped. */
DRM_CONTEXT_2DONLY = 0x02 /* This context is for 2D rendering only. */
} drmContextFlags, *drmContextFlagsPtr;
typedef struct _drmBufDesc {
int count; /* Number of buffers of this size */
int size; /* Size in bytes */
int low_mark; /* Low water mark */
int high_mark; /* High water mark */
} drmBufDesc, *drmBufDescPtr;
typedef struct _drmBufInfo {
int count; /* Number of buffers described in list */
drmBufDescPtr list; /* List of buffer descriptions */
} drmBufInfo, *drmBufInfoPtr;
typedef struct _drmBuf {
int idx; /* Index into master buflist */
int total; /* Buffer size */
int used; /* Amount of buffer in use (for DMA) */
drmAddress address; /* Address */
} drmBuf, *drmBufPtr;
typedef struct _drmBufMap {
int count; /* Number of buffers mapped */
drmBufPtr list; /* Buffers */
} drmBufMap, *drmBufMapPtr;
typedef struct _drmLock {
volatile unsigned int lock;
char padding[60];
/* This is big enough for most current (and future?) architectures:
DEC Alpha: 32 bytes
Intel Merced: ?
Intel P5/PPro/PII/PIII: 32 bytes
Intel StrongARM: 32 bytes
Intel i386/i486: 16 bytes
MIPS: 32 bytes (?)
Motorola 68k: 16 bytes
Motorola PowerPC: 32 bytes
Sun SPARC: 32 bytes
*/
} drmLock, *drmLockPtr;
typedef struct _drmDMAReq {
/* Indices here refer to the offset into
list in drmBufInfo */
drmContext context; /* Context handle */
int send_count; /* Number of buffers to send */
int *send_list; /* List of handles to buffers */
int *send_sizes; /* Lengths of data to send, in bytes */
drmDMAFlags flags; /* Flags */
int request_count; /* Number of buffers requested */
int request_size; /* Desired size of buffers requested */
int *request_list; /* Buffer information */
int *request_sizes; /* Minimum acceptable sizes */
int granted_count; /* Number of buffers granted at this size */
} drmDMAReq, *drmDMAReqPtr;
#if 0
/* The kernel does this, but it doesn't
seem necessary with recent gcc's. */
typedef struct { unsigned int a[100]; } __drm_dummy_lock_t;
#define __drm_dummy_lock(lock) (*(__volatile__ __drm_dummy_lock_t *)lock)
#else
#define __drm_dummy_lock(lock) (*(__volatile__ unsigned int *)lock)
#endif
#define DRM_LOCK_HELD 0x80000000 /* Hardware lock is held */
#define DRM_LOCK_CONT 0x40000000 /* Hardware lock is contended */
#if __GNUC__ >= 2 && defined(__i386)
/* Reflect changes here to drmP.h */
#define DRM_CAS(lock,old,new,__ret) \
do { \
int __dummy; /* Can't mark eax as clobbered */ \
__asm__ __volatile__( \
"lock ; cmpxchg %4,%1\n\t" \
"setnz %0" \
: "=d" (__ret), \
"=m" (__drm_dummy_lock(lock)), \
"=a" (__dummy) \
: "2" (old), \
"r" (new)); \
} while (0)
#endif
#ifndef DRM_CAS
#define DRM_CAS(lock,old,new,ret) do { ret=1; } while (0) /* FAST LOCK FAILS */
#endif
#define DRM_LIGHT_LOCK(fd,lock,context) \
do { \
char __ret; \
DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret); \
if (__ret) drmGetLock(fd,context,0); \
} while(0)
/* This one counts fast locks -- for
benchmarking only. */
#define DRM_LIGHT_LOCK_COUNT(fd,lock,context,count) \
do { \
char __ret; \
DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret); \
if (__ret) drmGetLock(fd,context,0); \
else ++count; \
} while(0)
#define DRM_LOCK(fd,lock,context,flags) \
do { \
if (flags) drmGetLock(fd,context,flags); \
else DRM_LIGHT_LOCK(fd,lock,context); \
} while(0)
#define DRM_UNLOCK(fd,lock,context) \
do { \
char __ret; \
DRM_CAS(lock,DRM_LOCK_HELD|context,context,__ret); \
if (__ret) drmUnlock(fd,context); \
} while(0)
/* Simple spin locks */
#define DRM_SPINLOCK(spin,val) \
do { \
char __ret; \
do { \
DRM_CAS(spin,0,val,__ret); \
if (__ret) while ((spin)->lock); \
} while (__ret); \
} while(0)
#define DRM_SPINLOCK_TAKE(spin,val) \
do { \
char __ret; \
int cur; \
do { \
cur = (*spin).lock; \
DRM_CAS(spin,cur,val,__ret); \
} while (__ret); \
} while(0)
#define DRM_SPINLOCK_COUNT(spin,val,count,__ret) \
do { \
int __i; \
__ret = 1; \
for (__i = 0; __ret && __i < count; __i++) { \
DRM_CAS(spin,0,val,__ret); \
if (__ret) for (;__i < count && (spin)->lock; __i++); \
} \
} while(0)
#define DRM_SPINUNLOCK(spin,val) \
do { \
char __ret; \
if ((*spin).lock == val) { /* else server stole lock */ \
do { \
DRM_CAS(spin,val,0,__ret); \
} while (__ret); \
} \
} while(0)
/* General user-level programmer's API: unprivileged */
extern int drmAvailable(void);
extern int drmOpen(const char *name, const char *busid);
extern int drmClose(int fd);
extern drmVersionPtr drmGetVersion(int fd);
extern void drmFreeVersion(drmVersionPtr);
extern int drmGetMagic(int fd, drmMagicPtr magic);
extern char *drmGetBusid(int fd);
extern int drmGetInterruptFromBusID(int fd, int busnum, int devnum,
int funcnum);
/* General user-level programmer's API: X server (root) only */
extern void drmFreeBusid(const char *busid);
extern int drmSetBusid(int fd, const char *busid);
extern int drmAuthMagic(int fd, drmMagic magic);
extern int drmAddMap(int fd,
drmHandle offset,
drmSize size,
drmMapType type,
drmMapFlags flags,
drmHandlePtr handle);
extern int drmAddBufs(int fd, int count, int size,
drmBufDescFlags flags,
int agp_offset);
extern int drmMarkBufs(int fd, double low, double high);
extern int drmCreateContext(int fd, drmContextPtr handle);
extern int drmSetContextFlags(int fd, drmContext context,
drmContextFlags flags);
extern int drmGetContextFlags(int fd, drmContext context,
drmContextFlagsPtr flags);
extern int drmAddContextTag(int fd, drmContext context, void *tag);
extern int drmDelContextTag(int fd, drmContext context);
extern void *drmGetContextTag(int fd, drmContext context);
extern drmContextPtr drmGetReservedContextList(int fd, int *count);
extern void drmFreeReservedContextList(drmContextPtr);
extern int drmSwitchToContext(int fd, drmContext context);
extern int drmDestroyContext(int fd, drmContext handle);
extern int drmCreateDrawable(int fd, drmDrawablePtr handle);
extern int drmDestroyDrawable(int fd, drmDrawable handle);
extern int drmCtlInstHandler(int fd, int irq);
extern int drmCtlUninstHandler(int fd);
extern int drmInstallSIGIOHandler(int fd,
void (*f)(int fd,
void *oldctx,
void *newctx));
extern int drmRemoveSIGIOHandler(int fd);
/* General user-level programmer's API: authenticated client and/or X */
extern int drmMap(int fd,
drmHandle handle,
drmSize size,
drmAddressPtr address);
extern int drmUnmap(drmAddress address, drmSize size);
extern drmBufInfoPtr drmGetBufInfo(int fd);
extern drmBufMapPtr drmMapBufs(int fd);
extern int drmUnmapBufs(drmBufMapPtr bufs);
extern int drmDMA(int fd, drmDMAReqPtr request);
extern int drmFreeBufs(int fd, int count, int *list);
extern int drmGetLock(int fd,
drmContext context,
drmLockFlags flags);
extern int drmUnlock(int fd, drmContext context);
extern int drmFinish(int fd, int context, drmLockFlags flags);
/* AGP/GART support: X server (root) only */
extern int drmAgpAcquire(int fd);
extern int drmAgpRelease(int fd);
extern int drmAgpEnable(int fd, unsigned long mode);
extern int drmAgpAlloc(int fd, unsigned long size,
unsigned long type, unsigned long *address,
unsigned long *handle);
extern int drmAgpFree(int fd, unsigned long handle);
extern int drmAgpBind(int fd, unsigned long handle,
unsigned long offset);
extern int drmAgpUnbind(int fd, unsigned long handle);
/* AGP/GART info: authenticated client and/or X */
extern int drmAgpVersionMajor(int fd);
extern int drmAgpVersionMinor(int fd);
extern unsigned long drmAgpGetMode(int fd);
extern unsigned long drmAgpBase(int fd); /* Physical location */
extern unsigned long drmAgpSize(int fd); /* Bytes */
extern unsigned long drmAgpMemoryUsed(int fd);
extern unsigned long drmAgpMemoryAvail(int fd);
extern unsigned int drmAgpVendorId(int fd);
extern unsigned int drmAgpDeviceId(int fd);
/* Support routines */
extern int drmError(int err, const char *label);
extern void *drmMalloc(int size);
extern void drmFree(void *pt);
/* Hash table routines */
extern void *drmHashCreate(void);
extern int drmHashDestroy(void *t);
extern int drmHashLookup(void *t, unsigned long key, void **value);
extern int drmHashInsert(void *t, unsigned long key, void *value);
extern int drmHashDelete(void *t, unsigned long key);
extern int drmHashFirst(void *t, unsigned long *key, void **value);
extern int drmHashNext(void *t, unsigned long *key, void **value);
/* PRNG routines */
extern void *drmRandomCreate(unsigned long seed);
extern int drmRandomDestroy(void *state);
extern unsigned long drmRandom(void *state);
extern double drmRandomDouble(void *state);
/* Skip list routines */
extern void *drmSLCreate(void);
extern int drmSLDestroy(void *l);
extern int drmSLLookup(void *l, unsigned long key, void **value);
extern int drmSLInsert(void *l, unsigned long key, void *value);
extern int drmSLDelete(void *l, unsigned long key);
extern int drmSLNext(void *l, unsigned long *key, void **value);
extern int drmSLFirst(void *l, unsigned long *key, void **value);
extern void drmSLDump(void *l);
extern int drmSLLookupNeighbors(void *l, unsigned long key,
unsigned long *prev_key, void **prev_value,
unsigned long *next_key, void **next_value);
#endif
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