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drm: move protection stuff into separate function 

Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Dave Airlie 2007-02-10 11:53:13 +11:00
parent 8311d570bc
commit 5cc7f9abec
1 changed files with 26 additions and 18 deletions
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44
drivers/char/drm/drm_vm.c
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@ -41,6 +41,30 @@
static void drm_vm_open(struct vm_area_struct *vma);
static void drm_vm_close(struct vm_area_struct *vma);
pgprot_t drm_io_prot(uint32_t map_type, struct vm_area_struct *vma)
{
pgprot_t tmp = vm_get_page_prot(vma->vm_flags);
#if defined(__i386__) || defined(__x86_64__)
if (boot_cpu_data.x86 > 3 && map_type != _DRM_AGP) {
pgprot_val(tmp) |= _PAGE_PCD;
pgprot_val(tmp) &= ~_PAGE_PWT;
}
#elif defined(__powerpc__)
pgprot_val(tmp) |= _PAGE_NO_CACHE;
if (map_type == _DRM_REGISTERS)
pgprot_val(tmp) |= _PAGE_GUARDED;
#endif
#if defined(__ia64__)
if (efi_range_is_wc(vma->vm_start, vma->vm_end -
vma->vm_start))
tmp = pgprot_writecombine(tmp);
else
tmp = pgprot_noncached(tmp);
#endif
return tmp;
}
/**
* \c nopage method for AGP virtual memory.
*
@ -600,25 +624,9 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
/* fall through to _DRM_FRAME_BUFFER... */
case _DRM_FRAME_BUFFER:
case _DRM_REGISTERS:
#if defined(__i386__) || defined(__x86_64__)
if (boot_cpu_data.x86 > 3 && map->type != _DRM_AGP) {
pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
}
#elif defined(__powerpc__)
pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
if (map->type == _DRM_REGISTERS)
pgprot_val(vma->vm_page_prot) |= _PAGE_GUARDED;
#endif
vma->vm_flags |= VM_IO; /* not in core dump */
#if defined(__ia64__)
if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
vma->vm_page_prot =
pgprot_writecombine(vma->vm_page_prot);
else
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#endif
offset = dev->driver->get_reg_ofs(dev);
vma->vm_flags |= VM_IO; /* not in core dump */
vma->vm_page_prot = drm_io_prot(map->type, vma);
#ifdef __sparc__
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
if (io_remap_pfn_range(vma, vma->vm_start,