[net-next-2.6.git] / drivers / gpu / drm / via / via_video.c

/*
 * Copyright 2005 Thomas Hellstrom. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Author: Thomas Hellstrom 2005.
 *
 * Video and XvMC related functions.
 */

#include "drmP.h"
#include "via_drm.h"
#include "via_drv.h"

void via_init_futex(drm_via_private_t *dev_priv)
{
	unsigned int i;

	DRM_DEBUG("\n");

	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
		DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i]));
		XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0;
	}
}

void via_cleanup_futex(drm_via_private_t *dev_priv)
{
}

void via_release_futex(drm_via_private_t *dev_priv, int context)
{
	unsigned int i;
	volatile int *lock;

	if (!dev_priv->sarea_priv)
		return;

	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
		lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
		if ((_DRM_LOCKING_CONTEXT(*lock) == context)) {
			if (_DRM_LOCK_IS_HELD(*lock)
			    && (*lock & _DRM_LOCK_CONT)) {
				DRM_WAKEUP(&(dev_priv->decoder_queue[i]));
			}
			*lock = 0;
		}
	}
}

int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
	drm_via_futex_t *fx = data;
	volatile int *lock;
	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
	drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
	int ret = 0;

	DRM_DEBUG("\n");

	if (fx->lock >= VIA_NR_XVMC_LOCKS)
		return -EFAULT;

	lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);

	switch (fx->func) {
	case VIA_FUTEX_WAIT:
		DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
			    (fx->ms / 10) * (DRM_HZ / 100), *lock != fx->val);
		return ret;
	case VIA_FUTEX_WAKE:
		DRM_WAKEUP(&(dev_priv->decoder_queue[fx->lock]));
		return 0;
	}
	return 0;
}
Commit	Line	Data
22f579c6 DA	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
58c1e85a	32	void via_init_futex(drm_via_private_t *dev_priv)
22f579c6 DA	33	{
	34	unsigned int i;
	35
3e684eae	36	DRM_DEBUG("\n");
22f579c6 DA	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
58c1e85a	44	void via_cleanup_futex(drm_via_private_t *dev_priv)
22f579c6	45	{
b5e89ed5	46	}
22f579c6	47
58c1e85a	48	void via_release_futex(drm_via_private_t *dev_priv, int context)
22f579c6 DA	49	{
	50	unsigned int i;
	51	volatile int *lock;
	52
92514243 DA	53	if (!dev_priv->sarea_priv)
	54	return;
	55
b5e89ed5	56	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
92514243	57	lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
b5e89ed5 DA	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]));
22f579c6 DA	62	}
	63	*lock = 0;
	64	}
b5e89ed5 DA	65	}
b5e89ed5 DA	66	}
22f579c6	67
c153f45f	68	int via_decoder_futex(struct drm_device dev, void data, struct drm_file *file_priv)
22f579c6	69	{
c153f45f	70	drm_via_futex_t *fx = data;
22f579c6 DA	71	volatile int *lock;
	72	drm_via_private_t dev_priv = (drm_via_private_t ) dev->dev_private;
	73	drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
	74	int ret = 0;
	75
3e684eae	76	DRM_DEBUG("\n");
22f579c6	77
22fb573a	78	if (fx->lock >= VIA_NR_XVMC_LOCKS)
22f579c6 DA	79	return -EFAULT;
22f579c6 DA	80
c153f45f	81	lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
22f579c6	82
c153f45f	83	switch (fx->func) {
22f579c6	84	case VIA_FUTEX_WAIT:
c153f45f EA	85	DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
c153f45f EA	86	(fx->ms / 10) * (DRM_HZ / 100), *lock != fx->val);
22f579c6 DA	87	return ret;
22f579c6 DA	88	case VIA_FUTEX_WAKE:
c153f45f	89	DRM_WAKEUP(&(dev_priv->decoder_queue[fx->lock]));
22f579c6 DA	90	return 0;
	91	}
	92	return 0;
	93	}