kernel_samsung_sm7125/drivers/char/drm/via_mm.c

/*
 * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA.
 * 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 AUTHORS OR COPYRIGHT HOLDERS AND/OR THEIR 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.
 */
/*
 * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
 */

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

#define VIA_MM_ALIGN_SHIFT 4
#define VIA_MM_ALIGN_MASK ( (1 << VIA_MM_ALIGN_SHIFT) - 1)

int via_agp_init(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_agp_t agp;
	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
	int ret;

	DRM_COPY_FROM_USER_IOCTL(agp, (drm_via_agp_t __user *) data,
				 sizeof(agp));
	mutex_lock(&dev->struct_mutex);
	ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_AGP, 0,
				 agp.size >> VIA_MM_ALIGN_SHIFT);

	if (ret) {
		DRM_ERROR("AGP memory manager initialisation error\n");
		mutex_unlock(&dev->struct_mutex);
		return ret;
	}

	dev_priv->agp_initialized = 1;
	dev_priv->agp_offset = agp.offset;
	mutex_unlock(&dev->struct_mutex);

	DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
	return 0;
}

int via_fb_init(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_fb_t fb;
	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
	int ret;

	DRM_COPY_FROM_USER_IOCTL(fb, (drm_via_fb_t __user *) data, sizeof(fb));

	mutex_lock(&dev->struct_mutex);
	ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_VIDEO, 0,
				 fb.size >> VIA_MM_ALIGN_SHIFT);

	if (ret) {
		DRM_ERROR("VRAM memory manager initialisation error\n");
		mutex_unlock(&dev->struct_mutex);
		return ret;
	}

	dev_priv->vram_initialized = 1;
	dev_priv->vram_offset = fb.offset;

	mutex_unlock(&dev->struct_mutex);
	DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);

	return 0;

}

int via_final_context(struct drm_device *dev, int context)
{
	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;

	via_release_futex(dev_priv, context);

	/* Linux specific until context tracking code gets ported to BSD */
	/* Last context, perform cleanup */
	if (dev->ctx_count == 1 && dev->dev_private) {
		DRM_DEBUG("Last Context\n");
		if (dev->irq)
			drm_irq_uninstall(dev);
		via_cleanup_futex(dev_priv);
		via_do_cleanup_map(dev);
	}
	return 1;
}

void via_lastclose(struct drm_device *dev)
{
	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;

	if (!dev_priv)
		return;

	mutex_lock(&dev->struct_mutex);
	drm_sman_cleanup(&dev_priv->sman);
	dev_priv->vram_initialized = 0;
	dev_priv->agp_initialized = 0;
	mutex_unlock(&dev->struct_mutex);
}	

int via_mem_alloc(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;

	drm_via_mem_t mem;
	int retval = 0;
	drm_memblock_item_t *item;
	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
	unsigned long tmpSize;

	DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t __user *) data,
				 sizeof(mem));

	if (mem.type > VIA_MEM_AGP) {
		DRM_ERROR("Unknown memory type allocation\n");
		return DRM_ERR(EINVAL);
	}
	mutex_lock(&dev->struct_mutex);
	if (0 == ((mem.type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
		      dev_priv->agp_initialized)) {
		DRM_ERROR
		    ("Attempt to allocate from uninitialized memory manager.\n");
		mutex_unlock(&dev->struct_mutex);
		return DRM_ERR(EINVAL);
	}

	tmpSize = (mem.size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
	item = drm_sman_alloc(&dev_priv->sman, mem.type, tmpSize, 0,
			      (unsigned long)priv);
	mutex_unlock(&dev->struct_mutex);
	if (item) {
		mem.offset = ((mem.type == VIA_MEM_VIDEO) ?
			      dev_priv->vram_offset : dev_priv->agp_offset) +
		    (item->mm->
		     offset(item->mm, item->mm_info) << VIA_MM_ALIGN_SHIFT);
		mem.index = item->user_hash.key;
	} else {
		mem.offset = 0;
		mem.size = 0;
		mem.index = 0;
		DRM_DEBUG("Video memory allocation failed\n");
		retval = DRM_ERR(ENOMEM);
	}
	DRM_COPY_TO_USER_IOCTL((drm_via_mem_t __user *) data, mem, sizeof(mem));

	return retval;
}

int via_mem_free(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_via_private_t *dev_priv = dev->dev_private;
	drm_via_mem_t mem;
	int ret;

	DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t __user *) data,
				 sizeof(mem));

	mutex_lock(&dev->struct_mutex);
	ret = drm_sman_free_key(&dev_priv->sman, mem.index);
	mutex_unlock(&dev->struct_mutex);
	DRM_DEBUG("free = 0x%lx\n", mem.index);

	return ret;
}


void via_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
{
	drm_via_private_t *dev_priv = dev->dev_private;
	drm_file_t *priv = filp->private_data;

	mutex_lock(&dev->struct_mutex);
	if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)priv)) {
		mutex_unlock(&dev->struct_mutex);
		return;
	}

	if (dev->driver->dma_quiescent) {
		dev->driver->dma_quiescent(dev);
	}

	drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)priv);
	mutex_unlock(&dev->struct_mutex);
	return;
}