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 <drm/drmP.h> 29 #include <drm/via_drm.h> 30 #include "via_drv.h" 31 32 void via_init_futex(drm_via_private_t *dev_priv) 33 { 34 unsigned int i; 35 36 DRM_DEBUG("\n"); 37 38 for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { 39 #ifdef __NetBSD__ 40 spin_lock_init(&dev_priv->decoder_lock[i]); 41 DRM_INIT_WAITQUEUE(&dev_priv->decoder_queue[i], "viadec"); 42 #else 43 init_waitqueue_head(&(dev_priv->decoder_queue[i])); 44 #endif 45 XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0; 46 } 47 } 48 49 void via_cleanup_futex(drm_via_private_t *dev_priv) 50 { 51 #ifdef __NetBSD__ 52 unsigned i; 53 54 for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { 55 DRM_DESTROY_WAITQUEUE(&dev_priv->decoder_queue[i]); 56 spin_lock_destroy(&dev_priv->decoder_lock[i]); 57 } 58 #endif 59 } 60 61 void via_release_futex(drm_via_private_t *dev_priv, int context) 62 { 63 unsigned int i; 64 volatile int *lock; 65 66 if (!dev_priv->sarea_priv) 67 return; 68 69 for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { 70 lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i); 71 if ((_DRM_LOCKING_CONTEXT(*lock) == context)) { 72 if (_DRM_LOCK_IS_HELD(*lock) 73 && (*lock & _DRM_LOCK_CONT)) { 74 #ifdef __NetBSD__ 75 spin_lock(&dev_priv->decoder_lock[i]); 76 DRM_SPIN_WAKEUP_ALL(&dev_priv->decoder_queue[i], 77 &dev_priv->decoder_lock[i]); 78 spin_unlock(&dev_priv->decoder_lock[i]); 79 #else 80 wake_up(&(dev_priv->decoder_queue[i])); 81 #endif 82 } 83 *lock = 0; 84 } 85 } 86 } 87 88 int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv) 89 { 90 drm_via_futex_t *fx = data; 91 volatile int *lock; 92 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; 93 drm_via_sarea_t *sAPriv = dev_priv->sarea_priv; 94 int ret = 0; 95 96 DRM_DEBUG("\n"); 97 98 if (fx->lock >= VIA_NR_XVMC_LOCKS) 99 return -EFAULT; 100 101 lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock); 102 103 switch (fx->func) { 104 case VIA_FUTEX_WAIT: 105 #ifdef __NetBSD__ 106 spin_lock(&dev_priv->decoder_lock[fx->lock]); 107 DRM_SPIN_WAIT_ON(ret, &dev_priv->decoder_queue[fx->lock], 108 &dev_priv->decoder_lock[fx->lock], 109 (fx->ms / 10) * (DRM_HZ / 100), 110 *lock != fx->val); 111 spin_unlock(&dev_priv->decoder_lock[fx->lock]); 112 #else 113 DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock], 114 (fx->ms / 10) * (HZ / 100), *lock != fx->val); 115 #endif 116 return ret; 117 case VIA_FUTEX_WAKE: 118 #ifdef __NetBSD__ 119 spin_lock(&dev_priv->decoder_lock[fx->lock]); 120 DRM_SPIN_WAKEUP_ALL(&dev_priv->decoder_queue[fx->lock], 121 &dev_priv->decoder_lock[fx->lock]); 122 spin_unlock(&dev_priv->decoder_lock[fx->lock]); 123 #else 124 wake_up(&(dev_priv->decoder_queue[fx->lock])); 125 #endif 126 return 0; 127 } 128 return 0; 129 } 130