mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 04:31:19 +00:00
22fb573aff
"fx->lock" is used as the index in "dev_priv->decoder_queue[fx->lock]" which is an array of "VIA_NR_XVMC_LOCKS" elements. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*
|
|
* Copyright 2005 Thomas Hellstrom. All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sub license,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial portions
|
|
* of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Author: Thomas Hellstrom 2005.
|
|
*
|
|
* Video and XvMC related functions.
|
|
*/
|
|
|
|
#include "drmP.h"
|
|
#include "via_drm.h"
|
|
#include "via_drv.h"
|
|
|
|
void via_init_futex(drm_via_private_t * dev_priv)
|
|
{
|
|
unsigned int i;
|
|
|
|
DRM_DEBUG("\n");
|
|
|
|
for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
|
|
DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i]));
|
|
XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0;
|
|
}
|
|
}
|
|
|
|
void via_cleanup_futex(drm_via_private_t * dev_priv)
|
|
{
|
|
}
|
|
|
|
void via_release_futex(drm_via_private_t * dev_priv, int context)
|
|
{
|
|
unsigned int i;
|
|
volatile int *lock;
|
|
|
|
if (!dev_priv->sarea_priv)
|
|
return;
|
|
|
|
for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
|
|
lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
|
|
if ((_DRM_LOCKING_CONTEXT(*lock) == context)) {
|
|
if (_DRM_LOCK_IS_HELD(*lock)
|
|
&& (*lock & _DRM_LOCK_CONT)) {
|
|
DRM_WAKEUP(&(dev_priv->decoder_queue[i]));
|
|
}
|
|
*lock = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv)
|
|
{
|
|
drm_via_futex_t *fx = data;
|
|
volatile int *lock;
|
|
drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
|
|
drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
|
|
int ret = 0;
|
|
|
|
DRM_DEBUG("\n");
|
|
|
|
if (fx->lock >= VIA_NR_XVMC_LOCKS)
|
|
return -EFAULT;
|
|
|
|
lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
|
|
|
|
switch (fx->func) {
|
|
case VIA_FUTEX_WAIT:
|
|
DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
|
|
(fx->ms / 10) * (DRM_HZ / 100), *lock != fx->val);
|
|
return ret;
|
|
case VIA_FUTEX_WAKE:
|
|
DRM_WAKEUP(&(dev_priv->decoder_queue[fx->lock]));
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|