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22f579c6 DA |
1 | /* |
2 | * Copyright 2005 Thomas Hellstrom. 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), 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. | |
22 | * | |
23 | * Author: Thomas Hellstrom 2005. | |
24 | * | |
25 | * Video and XvMC related functions. | |
26 | */ | |
27 | ||
28 | #include "drmP.h" | |
29 | #include "via_drm.h" | |
30 | #include "via_drv.h" | |
31 | ||
b5e89ed5 | 32 | void via_init_futex(drm_via_private_t * dev_priv) |
22f579c6 DA |
33 | { |
34 | unsigned int i; | |
35 | ||
36 | DRM_DEBUG("%s\n", __FUNCTION__); | |
37 | ||
38 | for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { | |
39 | DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i])); | |
40 | XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0; | |
41 | } | |
42 | } | |
43 | ||
b5e89ed5 | 44 | void via_cleanup_futex(drm_via_private_t * dev_priv) |
22f579c6 | 45 | { |
b5e89ed5 | 46 | } |
22f579c6 | 47 | |
b5e89ed5 | 48 | void via_release_futex(drm_via_private_t * dev_priv, int context) |
22f579c6 DA |
49 | { |
50 | unsigned int i; | |
51 | volatile int *lock; | |
52 | ||
b5e89ed5 DA |
53 | for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { |
54 | lock = (int *)XVMCLOCKPTR(dev_priv->sarea_priv, i); | |
55 | if ((_DRM_LOCKING_CONTEXT(*lock) == context)) { | |
56 | if (_DRM_LOCK_IS_HELD(*lock) | |
57 | && (*lock & _DRM_LOCK_CONT)) { | |
58 | DRM_WAKEUP(&(dev_priv->decoder_queue[i])); | |
22f579c6 DA |
59 | } |
60 | *lock = 0; | |
61 | } | |
b5e89ed5 DA |
62 | } |
63 | } | |
22f579c6 | 64 | |
b5e89ed5 | 65 | int via_decoder_futex(DRM_IOCTL_ARGS) |
22f579c6 DA |
66 | { |
67 | DRM_DEVICE; | |
68 | drm_via_futex_t fx; | |
69 | volatile int *lock; | |
70 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; | |
71 | drm_via_sarea_t *sAPriv = dev_priv->sarea_priv; | |
72 | int ret = 0; | |
73 | ||
74 | DRM_DEBUG("%s\n", __FUNCTION__); | |
75 | ||
bbaf3641 AD |
76 | DRM_COPY_FROM_USER_IOCTL(fx, (drm_via_futex_t __user *) data, |
77 | sizeof(fx)); | |
22f579c6 DA |
78 | |
79 | if (fx.lock > VIA_NR_XVMC_LOCKS) | |
80 | return -EFAULT; | |
81 | ||
82 | lock = (int *)XVMCLOCKPTR(sAPriv, fx.lock); | |
83 | ||
84 | switch (fx.func) { | |
85 | case VIA_FUTEX_WAIT: | |
86 | DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx.lock], | |
87 | (fx.ms / 10) * (DRM_HZ / 100), *lock != fx.val); | |
88 | return ret; | |
89 | case VIA_FUTEX_WAKE: | |
90 | DRM_WAKEUP(&(dev_priv->decoder_queue[fx.lock])); | |
91 | return 0; | |
92 | } | |
93 | return 0; | |
94 | } |