2 * Copyright 2005 Thomas Hellstrom. All Rights Reserved.
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:
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
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), AND/OR THE 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.
23 * Author: Thomas Hellstrom 2005.
25 * Video and XvMC related functions.
29 #include <drm/via_drm.h>
32 void via_init_futex(drm_via_private_t
*dev_priv
)
38 for (i
= 0; i
< VIA_NR_XVMC_LOCKS
; ++i
) {
39 init_waitqueue_head(&(dev_priv
->decoder_queue
[i
]));
40 XVMCLOCKPTR(dev_priv
->sarea_priv
, i
)->lock
= 0;
44 void via_cleanup_futex(drm_via_private_t
*dev_priv
)
48 void via_release_futex(drm_via_private_t
*dev_priv
, int context
)
53 if (!dev_priv
->sarea_priv
)
56 for (i
= 0; i
< VIA_NR_XVMC_LOCKS
; ++i
) {
57 lock
= (volatile int *)XVMCLOCKPTR(dev_priv
->sarea_priv
, i
);
58 if ((_DRM_LOCKING_CONTEXT(*lock
) == context
)) {
59 if (_DRM_LOCK_IS_HELD(*lock
)
60 && (*lock
& _DRM_LOCK_CONT
)) {
61 wake_up(&(dev_priv
->decoder_queue
[i
]));
68 int via_decoder_futex(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
70 drm_via_futex_t
*fx
= data
;
72 drm_via_private_t
*dev_priv
= (drm_via_private_t
*) dev
->dev_private
;
73 drm_via_sarea_t
*sAPriv
= dev_priv
->sarea_priv
;
78 if (fx
->lock
>= VIA_NR_XVMC_LOCKS
)
81 lock
= (volatile int *)XVMCLOCKPTR(sAPriv
, fx
->lock
);
85 DRM_WAIT_ON(ret
, dev_priv
->decoder_queue
[fx
->lock
],
86 (fx
->ms
/ 10) * (HZ
/ 100), *lock
!= fx
->val
);
89 wake_up(&(dev_priv
->decoder_queue
[fx
->lock
]));