mirror of https://gitee.com/openkylin/linux.git
95 lines
2.7 KiB
C
95 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 <drm/drm_device.h>
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#include <drm/via_drm.h>
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#include "via_drv.h"
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void 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("\n");
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for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
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init_waitqueue_head(&(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 via_cleanup_futex(drm_via_private_t *dev_priv)
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{
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}
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void 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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if (!dev_priv->sarea_priv)
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return;
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for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
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lock = (volatile 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)
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&& (*lock & _DRM_LOCK_CONT)) {
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wake_up(&(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 via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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drm_via_futex_t *fx = data;
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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("\n");
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if (fx->lock >= VIA_NR_XVMC_LOCKS)
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return -EFAULT;
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lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
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switch (fx->func) {
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case VIA_FUTEX_WAIT:
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VIA_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
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(fx->ms / 10) * (HZ / 100), *lock != fx->val);
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return ret;
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case VIA_FUTEX_WAKE:
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wake_up(&(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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