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 32void via_init_futex(drm_via_private_t * dev_priv) 33{ 34 unsigned int i; 35 36 DRM_DEBUG("%s\n", __FUNCTION__); 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 44void via_cleanup_futex(drm_via_private_t * dev_priv) 45{ 46} 47 48void 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 68int via_decoder_futex(DRM_IOCTL_ARGS) 69{ 70 DRM_DEVICE; 71 drm_via_futex_t fx; 72 volatile int *lock; 73 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; 74 drm_via_sarea_t *sAPriv = dev_priv->sarea_priv; 75 int ret = 0; 76 77 DRM_DEBUG("%s\n", __FUNCTION__); 78 79 DRM_COPY_FROM_USER_IOCTL(fx, (drm_via_futex_t __user *) data, 80 sizeof(fx)); 81 82 if (fx.lock > VIA_NR_XVMC_LOCKS) 83 return -EFAULT; 84 85 lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx.lock); 86 87 switch (fx.func) { 88 case VIA_FUTEX_WAIT: 89 DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx.lock], 90 (fx.ms / 10) * (DRM_HZ / 100), *lock != fx.val); 91 return ret; 92 case VIA_FUTEX_WAKE: 93 DRM_WAKEUP(&(dev_priv->decoder_queue[fx.lock])); 94 return 0; 95 } 96 return 0; 97} 98