1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2005 Thomas Hellstrom. All Rights Reserved.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a
5*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"),
6*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation
7*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sub license,
8*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the
9*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions:
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * The above copyright notice and this permission notice (including the
12*4882a593Smuzhiyun * next paragraph) shall be included in all copies or substantial portions
13*4882a593Smuzhiyun * of the Software.
14*4882a593Smuzhiyun *
15*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18*4882a593Smuzhiyun * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19*4882a593Smuzhiyun * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20*4882a593Smuzhiyun * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21*4882a593Smuzhiyun * DEALINGS IN THE SOFTWARE.
22*4882a593Smuzhiyun *
23*4882a593Smuzhiyun * Author: Thomas Hellstrom 2005.
24*4882a593Smuzhiyun *
25*4882a593Smuzhiyun * Video and XvMC related functions.
26*4882a593Smuzhiyun */
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #include <drm/drm_device.h>
29*4882a593Smuzhiyun #include <drm/via_drm.h>
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #include "via_drv.h"
32*4882a593Smuzhiyun
via_init_futex(drm_via_private_t * dev_priv)33*4882a593Smuzhiyun void via_init_futex(drm_via_private_t *dev_priv)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun unsigned int i;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun DRM_DEBUG("\n");
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
40*4882a593Smuzhiyun init_waitqueue_head(&(dev_priv->decoder_queue[i]));
41*4882a593Smuzhiyun XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
via_cleanup_futex(drm_via_private_t * dev_priv)45*4882a593Smuzhiyun void via_cleanup_futex(drm_via_private_t *dev_priv)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
via_release_futex(drm_via_private_t * dev_priv,int context)49*4882a593Smuzhiyun void via_release_futex(drm_via_private_t *dev_priv, int context)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun unsigned int i;
52*4882a593Smuzhiyun volatile int *lock;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun if (!dev_priv->sarea_priv)
55*4882a593Smuzhiyun return;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
58*4882a593Smuzhiyun lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
59*4882a593Smuzhiyun if ((_DRM_LOCKING_CONTEXT(*lock) == context)) {
60*4882a593Smuzhiyun if (_DRM_LOCK_IS_HELD(*lock)
61*4882a593Smuzhiyun && (*lock & _DRM_LOCK_CONT)) {
62*4882a593Smuzhiyun wake_up(&(dev_priv->decoder_queue[i]));
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun *lock = 0;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
via_decoder_futex(struct drm_device * dev,void * data,struct drm_file * file_priv)69*4882a593Smuzhiyun int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv)
70*4882a593Smuzhiyun {
71*4882a593Smuzhiyun drm_via_futex_t *fx = data;
72*4882a593Smuzhiyun volatile int *lock;
73*4882a593Smuzhiyun drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
74*4882a593Smuzhiyun drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
75*4882a593Smuzhiyun int ret = 0;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun DRM_DEBUG("\n");
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun if (fx->lock >= VIA_NR_XVMC_LOCKS)
80*4882a593Smuzhiyun return -EFAULT;
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun switch (fx->func) {
85*4882a593Smuzhiyun case VIA_FUTEX_WAIT:
86*4882a593Smuzhiyun VIA_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
87*4882a593Smuzhiyun (fx->ms / 10) * (HZ / 100), *lock != fx->val);
88*4882a593Smuzhiyun return ret;
89*4882a593Smuzhiyun case VIA_FUTEX_WAKE:
90*4882a593Smuzhiyun wake_up(&(dev_priv->decoder_queue[fx->lock]));
91*4882a593Smuzhiyun return 0;
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun return 0;
94*4882a593Smuzhiyun }
95