diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2019-02-07 09:59:31 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-03-19 15:03:53 -0500 |
| commit | bf141a88b329d12c9aaea4f7e7a8fdbd2dfe987d (patch) | |
| tree | 2046b3bd8faca73da578d2ee8a9ef0318e254af3 /include/drm/drm_vma_manager.h | |
| parent | bed2dd84212eb0151ae3bfc39cdaa25a951749c1 (diff) | |
drm: Use the same mmap-range offset and size for GEM and TTM
GEM defines DRM_FILE_PAGE_OFFSET_{START,SIZE} constants for the
mmap-able range of addresses. TTM can use them as well.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'include/drm/drm_vma_manager.h')
| -rw-r--r-- | include/drm/drm_vma_manager.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/drm/drm_vma_manager.h b/include/drm/drm_vma_manager.h index c7987daeaed0..f4f8ff1cdeec 100644 --- a/include/drm/drm_vma_manager.h +++ b/include/drm/drm_vma_manager.h @@ -29,6 +29,18 @@ #include <linux/spinlock.h> #include <linux/types.h> +/* We make up offsets for buffer objects so we can recognize them at + * mmap time. pgoff in mmap is an unsigned long, so we need to make sure + * that the faked up offset will fit + */ +#if BITS_PER_LONG == 64 +#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1) +#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16) +#else +#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFUL >> PAGE_SHIFT) + 1) +#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFUL >> PAGE_SHIFT) * 16) +#endif + struct drm_file; struct drm_vma_offset_file { |