1 /**************************************************************************
3 Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
4 VA Linux Systems Inc., Fremont, California.
5 Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
7 The Weather Channel (TM) funded Tungsten Graphics to develop the
8 initial release of the Radeon 8500 driver under the XFree86 license.
9 This notice must be preserved.
13 Permission is hereby granted, free of charge, to any person obtaining
14 a copy of this software and associated documentation files (the
15 "Software"), to deal in the Software without restriction, including
16 without limitation the rights to use, copy, modify, merge, publish,
17 distribute, sublicense, and/or sell copies of the Software, and to
18 permit persons to whom the Software is furnished to do so, subject to
19 the following conditions:
21 The above copyright notice and this permission notice (including the
22 next paragraph) shall be included in all copies or substantial
23 portions of the Software.
25 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
28 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
29 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 **************************************************************************/
37 * Gareth Hughes <gareth@valinux.com>
38 * Keith Whitwell <keith@tungstengraphics.com>
39 * Kevin E. Martin <martin@valinux.com>
42 #include "main/glheader.h"
43 #include "main/mtypes.h"
44 #include "main/colormac.h"
46 #include "radeon_screen.h"
47 #include "radeon_common.h"
48 #include "radeon_lock.h"
50 /* Update the hardware state. This is called if another context has
51 * grabbed the hardware lock, which includes the X server. This
52 * function also updates the driver's window state after the X server
53 * moves, resizes or restacks a window -- the change will be reflected
54 * in the drawable position and clip rects. Since the X server grabs
55 * the hardware lock when it changes the window state, this routine will
56 * automatically be called after such a change.
58 void radeonGetLock(radeonContextPtr rmesa
, GLuint flags
)
60 __DRIdrawable
*const drawable
= radeon_get_drawable(rmesa
);
61 __DRIdrawable
*const readable
= radeon_get_readable(rmesa
);
62 __DRIscreen
*sPriv
= rmesa
->dri
.screen
;
64 drmGetLock(rmesa
->dri
.fd
, rmesa
->dri
.hwContext
, flags
);
66 /* The window might have moved, so we might need to get new clip
69 * NOTE: This releases and regrabs the hw lock to allow the X server
70 * to respond to the DRI protocol request for new drawable info.
71 * Since the hardware state depends on having the latest drawable
72 * clip rects, all state checking must be done _after_ this call.
75 DRI_VALIDATE_DRAWABLE_INFO(sPriv
, drawable
);
76 if (readable
&& drawable
!= readable
) {
77 DRI_VALIDATE_DRAWABLE_INFO(sPriv
, readable
);
80 if (drawable
&& (rmesa
->lastStamp
!= drawable
->lastStamp
)) {
81 radeon_window_moved(rmesa
);
82 rmesa
->lastStamp
= drawable
->lastStamp
;
85 rmesa
->vtbl
.get_lock(rmesa
);
94 static struct lock_debug ldebug
= {0};
98 /** TODO: use atomic operations for reference counting **/
99 /** gcc 4.2 has builtin functios for this **/
100 #define ATOMIC_INC_AND_FETCH(atomic) __sync_add_and_fetch(&atomic, 1)
101 #define ATOMIC_DEC_AND_FETCH(atomic) __sync_sub_and_fetch(&atomic, 1)
103 #define ATOMIC_INC_AND_FETCH(atomic) (++atomic)
104 #define ATOMIC_DEC_AND_FETCH(atomic) (--atomic)
108 void radeon_lock_hardware(radeonContextPtr radeon
110 ,const char* function
118 if (!radeon
->radeonScreen
->driScreen
->dri2
.enabled
) {
119 if (ATOMIC_INC_AND_FETCH(radeon
->dri
.hwLockCount
) > 1)
122 if ( RADEON_DEBUG
& RADEON_SANITY
)
123 fprintf(stderr
, "*** %d times of recursive call to %s ***\n"
124 "Original call was from %s (file: %s line: %d)\n"
125 "Now call is coming from %s (file: %s line: %d)\n"
126 , radeon
->dri
.hwLockCount
, __FUNCTION__
127 , ldebug
.function
, ldebug
.file
, ldebug
.line
128 , function
, file
, line
133 DRM_CAS(radeon
->dri
.hwLock
, radeon
->dri
.hwContext
,
134 (DRM_LOCK_HELD
| radeon
->dri
.hwContext
), ret
);
136 radeonGetLock(radeon
, 0);
138 ldebug
.function
= function
;
145 void radeon_unlock_hardware(radeonContextPtr radeon
)
147 if (!radeon
->radeonScreen
->driScreen
->dri2
.enabled
) {
148 if (ATOMIC_DEC_AND_FETCH(radeon
->dri
.hwLockCount
) > 0)
152 DRM_UNLOCK( radeon
->dri
.fd
,
154 radeon
->dri
.hwContext
);