via_drmclient.h revision 7e6fb56f 
1/*
2 * Copyright (C) 2005 The Unichrome Project, All Rights Reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) OR COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24#ifndef _VIA_DRMCLIENT_H
25#define _VIA_DRMCLIENT_H
26
27#include "stdint.h"
28#include "drm.h"
29#include "xf86drm.h"
30
31#ifdef X_NEED_DRMLOCK
32#define drm_hw_lock_t drmLock
33#endif
34
35#define UNICHROME_LOCK(fd, lockNo, saPriv, context, lastcontext, ret)	\
36    do {								\
37	volatile drm_hw_lock_t *lockPtr = XVMCLOCKPTR((saPriv), (lockNo));	\
38	unsigned lockVal;						\
39        DRM_CAS_RESULT(__ret);						\
40									\
41	ret = 0;							\
42	lockVal = lockPtr->lock & ~(DRM_LOCK_HELD | DRM_LOCK_CONT);	\
43	DRM_CAS(lockPtr, lockVal, (context) | DRM_LOCK_HELD, __ret);	\
44	if (__ret) {							\
45	    drm_via_futex_t fx;						\
46									\
47            lockVal = lockPtr->lock;					\
48	    if (! (lockVal & DRM_LOCK_HELD)) continue;			\
49	    if ((lockVal & ~(DRM_LOCK_HELD | DRM_LOCK_CONT) )		\
50		== (context)) {						\
51	      lastcontext = lockVal & ~(DRM_LOCK_HELD | DRM_LOCK_CONT);	\
52		break;							\
53	    }								\
54	    fx.val = lockVal | DRM_LOCK_CONT;				\
55	    DRM_CAS( lockPtr, lockVal, fx.val, __ret);			\
56	    lockVal = lockPtr->lock;					\
57	    if (__ret) continue;					\
58	    fx.func = VIA_FUTEX_WAIT;					\
59	    fx.lock = (lockNo);						\
60	    fx.ms = 10;							\
61	    ret = drmCommandWrite((fd), DRM_VIA_DEC_FUTEX,		\
62				  &fx,sizeof(fx));			\
63	    lastcontext = lockVal;					\
64	    if (ret) break;						\
65	    continue;							\
66	} else {							\
67	    lastcontext = lockVal;					\
68	    break;							\
69	}								\
70    } while (1)								\
71
72#define UNICHROME_UNLOCK(fd, lockNo, saPriv, context)			\
73    do {								\
74      volatile drm_hw_lock_t *lockPtr = XVMCLOCKPTR((saPriv), (lockNo)); 	\
75									\
76	if ((lockPtr->lock & ~DRM_LOCK_CONT) ==				\
77	       ((context) | DRM_LOCK_HELD)) {				\
78	  DRM_CAS_RESULT(__ret);					\
79	    DRM_CAS(lockPtr,(context) | DRM_LOCK_HELD, context, __ret); \
80	    if (__ret) {						\
81		drm_via_futex_t fx;					\
82		fx.func = VIA_FUTEX_WAKE;				\
83		fx.lock = lockNo;					\
84		DRM_CAS(lockPtr, (context) | DRM_LOCK_HELD |		\
85			DRM_LOCK_CONT,					\
86			context, __ret);				\
87		drmCommandWrite((fd), DRM_VIA_DEC_FUTEX, &fx,		\
88				sizeof(fx));				\
89	    }								\
90	}								\
91    } while (0)								\
92
93#define UNICHROME_LOCK_DECODER1 0
94#define UNICHROME_LOCK_DECODER2 1
95#define UNICHROME_LOCK_HQV      4
96#define __user
97
98#endif
99