drm/shared/via_map.c

/*
 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2003 S3 Graphics, Inc. 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
 * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS 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.
 */
#include "via.h"
#include "drmP.h"
#include "via_drm.h"
#include "via_drv.h"

int via_do_init_map(drm_device_t * dev, drm_via_init_t * init)
{
	drm_via_private_t *dev_priv;
	unsigned int i;

	DRM_DEBUG("%s\n", __FUNCTION__);

	via_init_command_verifier();
	dev_priv = DRM(alloc) (sizeof(drm_via_private_t), DRM_MEM_DRIVER);
	if (dev_priv == NULL)
		return -ENOMEM;

	memset(dev_priv, 0, sizeof(drm_via_private_t));

	DRM_GETSAREA();
	if (!dev_priv->sarea) {
		DRM_ERROR("could not find sarea!\n");
		dev->dev_private = (void *)dev_priv;
		via_do_cleanup_map(dev);
		return -EINVAL;
	}

	dev_priv->fb = drm_core_findmap(dev, init->fb_offset);
	if (!dev_priv->fb) {
		DRM_ERROR("could not find framebuffer!\n");
		dev->dev_private = (void *)dev_priv;
		via_do_cleanup_map(dev);
		return -EINVAL;
	}
	dev_priv->mmio = drm_core_findmap(dev, init->mmio_offset);
	if (!dev_priv->mmio) {
		DRM_ERROR("could not find mmio region!\n");
		dev->dev_private = (void *)dev_priv;
		via_do_cleanup_map(dev);
		return -EINVAL;
	}

	dev_priv->sarea_priv =
	    (drm_via_sarea_t *) ((u8 *) dev_priv->sarea->handle +
				 init->sarea_priv_offset);

	dev_priv->agpAddr = init->agpAddr;

	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i)
		DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i]));

	dev->dev_private = (void *)dev_priv;

	return 0;
}

int via_do_cleanup_map(drm_device_t * dev)
{
	if (dev->dev_private) {

		drm_via_private_t *dev_priv = dev->dev_private;

		via_dma_cleanup(dev);

		DRM(free) (dev_priv, sizeof(drm_via_private_t), DRM_MEM_DRIVER);
		dev->dev_private = NULL;
	}

	return 0;
}

int via_map_init(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_init_t init;

	DRM_DEBUG("%s\n", __FUNCTION__);

	DRM_COPY_FROM_USER_IOCTL(init, (drm_via_init_t *) data, sizeof(init));

	switch (init.func) {
	case VIA_INIT_MAP:
		return via_do_init_map(dev, &init);
	case VIA_CLEANUP_MAP:
		return via_do_cleanup_map(dev);
	}

	return -EINVAL;
}

int via_decoder_futex(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_futex_t fx;
	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_COPY_FROM_USER_IOCTL(fx, (drm_via_futex_t *) data, sizeof(fx));

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

	lock = 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;
}