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via_video.c revision 1.5.18.1 
      1 /*	$NetBSD: via_video.c,v 1.5.18.1 2019/06/10 22:08:28 christos Exp $	*/
      2 
      3 /*
      4  * Copyright 2005 Thomas Hellstrom. All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sub license,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the
     14  * next paragraph) shall be included in all copies or substantial portions
     15  * of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     20  * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     23  * DEALINGS IN THE SOFTWARE.
     24  *
     25  * Author: Thomas Hellstrom 2005.
     26  *
     27  * Video and XvMC related functions.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: via_video.c,v 1.5.18.1 2019/06/10 22:08:28 christos Exp $");
     32 
     33 #include <drm/drmP.h>
     34 #include <drm/via_drm.h>
     35 #include "via_drv.h"
     36 
     37 void via_init_futex(drm_via_private_t *dev_priv)
     38 {
     39 	unsigned int i;
     40 
     41 	DRM_DEBUG("\n");
     42 
     43 	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
     44 #ifdef __NetBSD__
     45 		spin_lock_init(&dev_priv->decoder_lock[i]);
     46 		DRM_INIT_WAITQUEUE(&dev_priv->decoder_queue[i], "viadec");
     47 #else
     48 		init_waitqueue_head(&(dev_priv->decoder_queue[i]));
     49 #endif
     50 		XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0;
     51 	}
     52 }
     53 
     54 void via_cleanup_futex(drm_via_private_t *dev_priv)
     55 {
     56 #ifdef __NetBSD__
     57 	unsigned i;
     58 
     59 	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
     60 		DRM_DESTROY_WAITQUEUE(&dev_priv->decoder_queue[i]);
     61 		spin_lock_destroy(&dev_priv->decoder_lock[i]);
     62 	}
     63 #endif
     64 }
     65 
     66 void via_release_futex(drm_via_private_t *dev_priv, int context)
     67 {
     68 	unsigned int i;
     69 	volatile int *lock;
     70 
     71 	if (!dev_priv->sarea_priv)
     72 		return;
     73 
     74 	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
     75 		lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
     76 		if ((_DRM_LOCKING_CONTEXT(*lock) == context)) {
     77 			if (_DRM_LOCK_IS_HELD(*lock)
     78 			    && (*lock & _DRM_LOCK_CONT)) {
     79 #ifdef __NetBSD__
     80 				spin_lock(&dev_priv->decoder_lock[i]);
     81 				DRM_SPIN_WAKEUP_ALL(&dev_priv->decoder_queue[i],
     82 				    &dev_priv->decoder_lock[i]);
     83 				spin_unlock(&dev_priv->decoder_lock[i]);
     84 #else
     85 				wake_up(&(dev_priv->decoder_queue[i]));
     86 #endif
     87 			}
     88 			*lock = 0;
     89 		}
     90 	}
     91 }
     92 
     93 int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv)
     94 {
     95 	drm_via_futex_t *fx = data;
     96 	volatile int *lock;
     97 	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
     98 	drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
     99 	int ret = 0;
    100 
    101 	DRM_DEBUG("\n");
    102 
    103 	if (fx->lock >= VIA_NR_XVMC_LOCKS)
    104 		return -EFAULT;
    105 
    106 	lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
    107 
    108 	switch (fx->func) {
    109 	case VIA_FUTEX_WAIT:
    110 #ifdef __NetBSD__
    111 		spin_lock(&dev_priv->decoder_lock[fx->lock]);
    112 		DRM_SPIN_WAIT_ON(ret, &dev_priv->decoder_queue[fx->lock],
    113 		    &dev_priv->decoder_lock[fx->lock],
    114 		    (fx->ms / 10) * (DRM_HZ / 100),
    115 		    *lock != fx->val);
    116 		spin_unlock(&dev_priv->decoder_lock[fx->lock]);
    117 #else
    118 		DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
    119 			    (fx->ms / 10) * (HZ / 100), *lock != fx->val);
    120 #endif
    121 		return ret;
    122 	case VIA_FUTEX_WAKE:
    123 #ifdef __NetBSD__
    124 		spin_lock(&dev_priv->decoder_lock[fx->lock]);
    125 		DRM_SPIN_WAKEUP_ALL(&dev_priv->decoder_queue[fx->lock],
    126 		    &dev_priv->decoder_lock[fx->lock]);
    127 		spin_unlock(&dev_priv->decoder_lock[fx->lock]);
    128 #else
    129 		wake_up(&(dev_priv->decoder_queue[fx->lock]));
    130 #endif
    131 		return 0;
    132 	}
    133 	return 0;
    134 }
    135