mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-22 17:33:01 +00:00
b5e89ed53e
I've been threatening this for a while, so no point hanging around. This lindents the DRM code which was always really bad in tabbing department. I've also fixed some misnamed files in comments and removed some trailing whitespace. Signed-off-by: Dave Airlie <airlied@linux.ie>
203 lines
5.6 KiB
C
203 lines
5.6 KiB
C
/**
|
|
* \file drm_memory.h
|
|
* Memory management wrappers for DRM
|
|
*
|
|
* \author Rickard E. (Rik) Faith <faith@valinux.com>
|
|
* \author Gareth Hughes <gareth@valinux.com>
|
|
*/
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/vmalloc.h>
|
|
#include "drmP.h"
|
|
|
|
/**
|
|
* Cut down version of drm_memory_debug.h, which used to be called
|
|
* drm_memory.h.
|
|
*/
|
|
|
|
#if __OS_HAS_AGP
|
|
|
|
#include <linux/vmalloc.h>
|
|
|
|
#ifdef HAVE_PAGE_AGP
|
|
#include <asm/agp.h>
|
|
#else
|
|
# ifdef __powerpc__
|
|
# define PAGE_AGP __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
|
|
# else
|
|
# define PAGE_AGP PAGE_KERNEL
|
|
# endif
|
|
#endif
|
|
|
|
/*
|
|
* Find the drm_map that covers the range [offset, offset+size).
|
|
*/
|
|
static inline drm_map_t *drm_lookup_map(unsigned long offset,
|
|
unsigned long size, drm_device_t * dev)
|
|
{
|
|
struct list_head *list;
|
|
drm_map_list_t *r_list;
|
|
drm_map_t *map;
|
|
|
|
list_for_each(list, &dev->maplist->head) {
|
|
r_list = (drm_map_list_t *) list;
|
|
map = r_list->map;
|
|
if (!map)
|
|
continue;
|
|
if (map->offset <= offset
|
|
&& (offset + size) <= (map->offset + map->size))
|
|
return map;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline void *agp_remap(unsigned long offset, unsigned long size,
|
|
drm_device_t * dev)
|
|
{
|
|
unsigned long *phys_addr_map, i, num_pages =
|
|
PAGE_ALIGN(size) / PAGE_SIZE;
|
|
struct drm_agp_mem *agpmem;
|
|
struct page **page_map;
|
|
void *addr;
|
|
|
|
size = PAGE_ALIGN(size);
|
|
|
|
#ifdef __alpha__
|
|
offset -= dev->hose->mem_space->start;
|
|
#endif
|
|
|
|
for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next)
|
|
if (agpmem->bound <= offset
|
|
&& (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >=
|
|
(offset + size))
|
|
break;
|
|
if (!agpmem)
|
|
return NULL;
|
|
|
|
/*
|
|
* OK, we're mapping AGP space on a chipset/platform on which memory accesses by
|
|
* the CPU do not get remapped by the GART. We fix this by using the kernel's
|
|
* page-table instead (that's probably faster anyhow...).
|
|
*/
|
|
/* note: use vmalloc() because num_pages could be large... */
|
|
page_map = vmalloc(num_pages * sizeof(struct page *));
|
|
if (!page_map)
|
|
return NULL;
|
|
|
|
phys_addr_map =
|
|
agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE;
|
|
for (i = 0; i < num_pages; ++i)
|
|
page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT);
|
|
addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
|
|
vfree(page_map);
|
|
|
|
return addr;
|
|
}
|
|
|
|
static inline unsigned long drm_follow_page(void *vaddr)
|
|
{
|
|
pgd_t *pgd = pgd_offset_k((unsigned long)vaddr);
|
|
pud_t *pud = pud_offset(pgd, (unsigned long)vaddr);
|
|
pmd_t *pmd = pmd_offset(pud, (unsigned long)vaddr);
|
|
pte_t *ptep = pte_offset_kernel(pmd, (unsigned long)vaddr);
|
|
return pte_pfn(*ptep) << PAGE_SHIFT;
|
|
}
|
|
|
|
#else /* __OS_HAS_AGP */
|
|
|
|
static inline drm_map_t *drm_lookup_map(unsigned long offset,
|
|
unsigned long size, drm_device_t * dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void *agp_remap(unsigned long offset, unsigned long size,
|
|
drm_device_t * dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline unsigned long drm_follow_page(void *vaddr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
static inline void *drm_ioremap(unsigned long offset, unsigned long size,
|
|
drm_device_t * dev)
|
|
{
|
|
if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
|
|
drm_map_t *map = drm_lookup_map(offset, size, dev);
|
|
|
|
if (map && map->type == _DRM_AGP)
|
|
return agp_remap(offset, size, dev);
|
|
}
|
|
return ioremap(offset, size);
|
|
}
|
|
|
|
static inline void *drm_ioremap_nocache(unsigned long offset,
|
|
unsigned long size, drm_device_t * dev)
|
|
{
|
|
if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
|
|
drm_map_t *map = drm_lookup_map(offset, size, dev);
|
|
|
|
if (map && map->type == _DRM_AGP)
|
|
return agp_remap(offset, size, dev);
|
|
}
|
|
return ioremap_nocache(offset, size);
|
|
}
|
|
|
|
static inline void drm_ioremapfree(void *pt, unsigned long size,
|
|
drm_device_t * dev)
|
|
{
|
|
/*
|
|
* This is a bit ugly. It would be much cleaner if the DRM API would use separate
|
|
* routines for handling mappings in the AGP space. Hopefully this can be done in
|
|
* a future revision of the interface...
|
|
*/
|
|
if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture
|
|
&& ((unsigned long)pt >= VMALLOC_START
|
|
&& (unsigned long)pt < VMALLOC_END)) {
|
|
unsigned long offset;
|
|
drm_map_t *map;
|
|
|
|
offset = drm_follow_page(pt) | ((unsigned long)pt & ~PAGE_MASK);
|
|
map = drm_lookup_map(offset, size, dev);
|
|
if (map && map->type == _DRM_AGP) {
|
|
vunmap(pt);
|
|
return;
|
|
}
|
|
}
|
|
|
|
iounmap(pt);
|
|
}
|