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
via_init_futex(drm_via_private_t * dev_priv)32 void via_init_futex(drm_via_private_t *dev_priv)
33 {
34 unsigned int i;
35
36 DRM_DEBUG("\n");
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
via_cleanup_futex(drm_via_private_t * dev_priv)44 void via_cleanup_futex(drm_via_private_t *dev_priv)
45 {
46 }
47
via_release_futex(drm_via_private_t * dev_priv,int context)48 void via_release_futex(drm_via_private_t *dev_priv, int context)
49 {
50 unsigned int i;
51 volatile int *lock;
52
53 if (!dev_priv->sarea_priv)
54 return;
55
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 DRM_WAKEUP(&(dev_priv->decoder_queue[i]));
62 }
63 *lock = 0;
64 }
65 }
66 }
67
via_decoder_futex(struct drm_device * dev,void * data,struct drm_file * file_priv)68 int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv)
69 {
70 drm_via_futex_t *fx = data;
71 volatile int *lock;
72 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
73 drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
74 int ret = 0;
75
76 DRM_DEBUG("\n");
77
78 if (fx->lock >= VIA_NR_XVMC_LOCKS)
79 return -EFAULT;
80
81 lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
82
83 switch (fx->func) {
84 case VIA_FUTEX_WAIT:
85 DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
86 (fx->ms / 10) * (DRM_HZ / 100), *lock != fx->val);
87 return ret;
88 case VIA_FUTEX_WAKE:
89 DRM_WAKEUP(&(dev_priv->decoder_queue[fx->lock]));
90 return 0;
91 }
92 return 0;
93 }
94