diff options
| author | Dave Airlie <airlied@linux.ie> | 2007-02-10 03:53:13 +0300 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2007-03-11 04:07:17 +0300 |
| commit | 5cc7f9abec8391e43b0a052c8880509668e24b35 (patch) | |
| tree | b22d62ab223bc7de7cfd154773c523c0bbeab0d2 /drivers/char | |
| parent | 8311d570bcb3faea68941ebd5e240eb2e96d65a0 (diff) | |
| download | linux-5cc7f9abec8391e43b0a052c8880509668e24b35.tar.xz | |
drm: move protection stuff into separate function
Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/drm/drm_vm.c | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/drivers/char/drm/drm_vm.c b/drivers/char/drm/drm_vm.c index 54a632848955..7ed77e16488c 100644 --- a/drivers/char/drm/drm_vm.c +++ b/drivers/char/drm/drm_vm.c @@ -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, |