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/*
* Copyright (C) 2005 The Unichrome Project, All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sub license,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) OR COPYRIGHT HOLDER(S) 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 _VIA_DRMCLIENT_H
#define _VIA_DRMCLIENT_H
#include "drm.h"
#include "xf86drm.h"
#include "stdint.h"
#ifdef X_NEED_DRMLOCK
#define drm_hw_lock_t drmLock
#endif
#define UNICHROME_LOCK(fd, lockNo, saPriv, context, lastcontext, ret) \
do { \
volatile drm_hw_lock_t *lockPtr = XVMCLOCKPTR((saPriv), (lockNo)); \
unsigned lockVal; \
DRM_CAS_RESULT(__ret); \
\
ret = 0; \
lockVal = lockPtr->lock & ~(DRM_LOCK_HELD | DRM_LOCK_CONT); \
DRM_CAS(lockPtr, lockVal, (context) | DRM_LOCK_HELD, __ret); \
if (__ret) { \
drm_via_futex_t fx; \
\
lockVal = lockPtr->lock; \
if (! (lockVal & DRM_LOCK_HELD)) continue; \
if ((lockVal & ~(DRM_LOCK_HELD | DRM_LOCK_CONT) ) \
== (context)) { \
lastcontext = lockVal & ~(DRM_LOCK_HELD | DRM_LOCK_CONT); \
break; \
} \
fx.val = lockVal | DRM_LOCK_CONT; \
DRM_CAS( lockPtr, lockVal, fx.val, __ret); \
lockVal = lockPtr->lock; \
if (__ret) continue; \
fx.func = VIA_FUTEX_WAIT; \
fx.lock = (lockNo); \
fx.ms = 10; \
ret = drmCommandWrite((fd), DRM_VIA_DEC_FUTEX, \
&fx,sizeof(fx)); \
lastcontext = lockVal; \
if (ret) break; \
continue; \
} else { \
lastcontext = lockVal; \
break; \
} \
} while (1) \
#define UNICHROME_UNLOCK(fd, lockNo, saPriv, context) \
do { \
volatile drm_hw_lock_t *lockPtr = XVMCLOCKPTR((saPriv), (lockNo)); \
\
if ((lockPtr->lock & ~DRM_LOCK_CONT) == \
((context) | DRM_LOCK_HELD)) { \
DRM_CAS_RESULT(__ret); \
DRM_CAS(lockPtr,(context) | DRM_LOCK_HELD, context, __ret); \
if (__ret) { \
drm_via_futex_t fx; \
fx.func = VIA_FUTEX_WAKE; \
fx.lock = lockNo; \
DRM_CAS(lockPtr, (context) | DRM_LOCK_HELD | \
DRM_LOCK_CONT, \
context, __ret); \
drmCommandWrite((fd), DRM_VIA_DEC_FUTEX, &fx, \
sizeof(fx)); \
} \
} \
} while (0) \
#define UNICHROME_LOCK_DECODER1 0
#define UNICHROME_LOCK_DECODER2 1
#define UNICHROME_LOCK_HQV 4
#define __user
#endif
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