160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
/* drm_memory.h -- Memory management wrappers for DRM -*- linux-c -*-
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* Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rickard E. (Rik) Faith <faith@valinux.com>
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* Gareth Hughes <gareth@valinux.com>
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*/
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#define __NO_VERSION__
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#include <linux/config.h>
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#include "drmP.h"
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#include <linux/wrapper.h>
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/* Cut down version of drm_memory_debug.h, which used to be called
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* drm_memory.h. If you want the debug functionality, change 0 to 1
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* below.
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*/
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#define DEBUG_MEMORY 0
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#if DEBUG_MEMORY
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#include "drm_memory_debug.h"
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#else
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void DRM(mem_init)(void)
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{
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}
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/* drm_mem_info is called whenever a process reads /dev/drm/mem. */
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int DRM(mem_info)(char *buf, char **start, off_t offset,
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int len, int *eof, void *data)
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{
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return 0;
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}
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void *DRM(alloc)(size_t size, int area)
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{
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return kmalloc(size, GFP_KERNEL);
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}
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void *DRM(realloc)(void *oldpt, size_t oldsize, size_t size, int area)
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{
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void *pt;
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if (!(pt = kmalloc(size, GFP_KERNEL))) return NULL;
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if (oldpt && oldsize) {
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memcpy(pt, oldpt, oldsize);
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kfree(oldpt);
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}
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return pt;
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}
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void DRM(free)(void *pt, size_t size, int area)
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{
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kfree(pt);
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}
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unsigned long DRM(alloc_pages)(int order, int area)
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{
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unsigned long address;
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unsigned long bytes = PAGE_SIZE << order;
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unsigned long addr;
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unsigned int sz;
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address = __get_free_pages(GFP_KERNEL, order);
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if (!address)
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return 0;
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/* Zero */
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memset((void *)address, 0, bytes);
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/* Reserve */
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for (addr = address, sz = bytes;
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sz > 0;
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addr += PAGE_SIZE, sz -= PAGE_SIZE) {
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mem_map_reserve(virt_to_page(addr));
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}
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return address;
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}
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void DRM(free_pages)(unsigned long address, int order, int area)
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{
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unsigned long bytes = PAGE_SIZE << order;
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unsigned long addr;
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unsigned int sz;
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if (!address)
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return;
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/* Unreserve */
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for (addr = address, sz = bytes;
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sz > 0;
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addr += PAGE_SIZE, sz -= PAGE_SIZE) {
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mem_map_unreserve(virt_to_page(addr));
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}
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free_pages(address, order);
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}
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void *DRM(ioremap)(unsigned long offset, unsigned long size)
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{
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return ioremap(offset, size);
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}
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void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size)
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{
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return ioremap_nocache(offset, size);
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}
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void DRM(ioremapfree)(void *pt, unsigned long size)
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{
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iounmap(pt);
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}
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#if __REALLY_HAVE_AGP
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agp_memory *DRM(alloc_agp)(int pages, u32 type)
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{
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return DRM(agp_allocate_memory)(pages, type);
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}
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int DRM(free_agp)(agp_memory *handle, int pages)
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{
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return DRM(agp_free_memory)(handle) ? 0 : -EINVAL;
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}
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int DRM(bind_agp)(agp_memory *handle, unsigned int start)
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{
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return DRM(agp_bind_memory)(handle, start);
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}
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int DRM(unbind_agp)(agp_memory *handle)
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{
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return DRM(agp_unbind_memory)(handle);
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}
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#endif /* agp */
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#endif /* debug_memory */
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