22f579c621
Add DRM device driver for VIA Unichrome chipsets From: Unichrome Project http://unichrome.sf.net, Erdi Chen, Thomas Hellstrom Signed-off-by: Dave Airlie <airlied@linux.ie>
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*
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* Copyright 2005 Thomas Hellstrom. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Thomas Hellstrom 2005.
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*
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* Video and XvMC related functions.
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*/
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#include "drmP.h"
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#include "via_drm.h"
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#include "via_drv.h"
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void
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via_init_futex(drm_via_private_t *dev_priv)
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{
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unsigned int i;
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DRM_DEBUG("%s\n", __FUNCTION__);
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for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
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DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i]));
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XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0;
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}
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}
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void
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via_cleanup_futex(drm_via_private_t *dev_priv)
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{
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}
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void
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via_release_futex(drm_via_private_t *dev_priv, int context)
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{
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unsigned int i;
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volatile int *lock;
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for (i=0; i < VIA_NR_XVMC_LOCKS; ++i) {
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lock = (int *) XVMCLOCKPTR(dev_priv->sarea_priv, i);
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if ( (_DRM_LOCKING_CONTEXT( *lock ) == context)) {
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if (_DRM_LOCK_IS_HELD( *lock ) && (*lock & _DRM_LOCK_CONT)) {
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DRM_WAKEUP( &(dev_priv->decoder_queue[i]));
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}
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*lock = 0;
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}
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}
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}
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int
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via_decoder_futex(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_via_futex_t fx;
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volatile int *lock;
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drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
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drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
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int ret = 0;
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DRM_DEBUG("%s\n", __FUNCTION__);
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DRM_COPY_FROM_USER_IOCTL(fx, (drm_via_futex_t *) data, sizeof(fx));
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if (fx.lock > VIA_NR_XVMC_LOCKS)
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return -EFAULT;
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lock = (int *)XVMCLOCKPTR(sAPriv, fx.lock);
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switch (fx.func) {
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case VIA_FUTEX_WAIT:
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DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx.lock],
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(fx.ms / 10) * (DRM_HZ / 100), *lock != fx.val);
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return ret;
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case VIA_FUTEX_WAKE:
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DRM_WAKEUP(&(dev_priv->decoder_queue[fx.lock]));
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return 0;
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}
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return 0;
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}
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