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/* drm_memory.h -- Memory management wrappers for DRM -*- linux-c -*-
* Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS 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.
*
* Authors:
* Rickard E. (Rik) Faith <faith@valinux.com>
* Gareth Hughes <gareth@valinux.com>
*/
#define __NO_VERSION__
#include <linux/config.h>
#include "drmP.h"
/* Cut down version of drm_memory_debug.h, which used to be called
* drm_memory.h. If you want the debug functionality, change 0 to 1
* below.
*/
#define DEBUG_MEMORY 0
#if DEBUG_MEMORY
#include "drm_memory_debug.h"
#else
void DRM(mem_init)(void)
{
}
/* drm_mem_info is called whenever a process reads /dev/drm/mem. */
int DRM(mem_info)(char *buf, char **start, off_t offset,
int len, int *eof, void *data)
{
return 0;
}
void *DRM(alloc)(size_t size, int area)
{
return kmalloc(size, GFP_KERNEL);
}
void *DRM(realloc)(void *oldpt, size_t oldsize, size_t size, int area)
{
void *pt;
if (!(pt = kmalloc(size, GFP_KERNEL))) return NULL;
if (oldpt && oldsize) {
memcpy(pt, oldpt, oldsize);
kfree(oldpt);
}
return pt;
}
void DRM(free)(void *pt, size_t size, int area)
{
kfree(pt);
}
unsigned long DRM(alloc_pages)(int order, int area)
{
unsigned long address;
unsigned long bytes = PAGE_SIZE << order;
unsigned long addr;
unsigned int sz;
address = __get_free_pages(GFP_KERNEL, order);
if (!address)
return 0;
/* Zero */
memset((void *)address, 0, bytes);
/* Reserve */
for (addr = address, sz = bytes;
sz > 0;
addr += PAGE_SIZE, sz -= PAGE_SIZE) {
SetPageReserved(virt_to_page(addr));
}
return address;
}
void DRM(free_pages)(unsigned long address, int order, int area)
{
unsigned long bytes = PAGE_SIZE << order;
unsigned long addr;
unsigned int sz;
if (!address)
return;
/* Unreserve */
for (addr = address, sz = bytes;
sz > 0;
addr += PAGE_SIZE, sz -= PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
}
free_pages(address, order);
}
void *DRM(ioremap)(unsigned long offset, unsigned long size)
{
return ioremap(offset, size);
}
void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size)
{
return ioremap_nocache(offset, size);
}
void DRM(ioremapfree)(void *pt, unsigned long size)
{
iounmap(pt);
}
#if __REALLY_HAVE_AGP
agp_memory *DRM(alloc_agp)(int pages, u32 type)
{
return DRM(agp_allocate_memory)(pages, type);
}
int DRM(free_agp)(agp_memory *handle, int pages)
{
return DRM(agp_free_memory)(handle) ? 0 : -EINVAL;
}
int DRM(bind_agp)(agp_memory *handle, unsigned int start)
{
return DRM(agp_bind_memory)(handle, start);
}
int DRM(unbind_agp)(agp_memory *handle)
{
return DRM(agp_unbind_memory)(handle);
}
#endif /* agp */
#endif /* debug_memory */
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