Add helper function to mmap ttm bo's using &drm_gem_object_funcs.mmap().
Note that with this code path access verification is done by drm_gem_mmap() (which calls drm_vma_node_is_allowed(()). The &ttm_bo_driver.verify_access() callback is is not used.
Signed-off-by: Gerd Hoffmann kraxel@redhat.com --- include/drm/drm_gem_ttm_helper.h | 2 ++ drivers/gpu/drm/drm_gem_ttm_helper.c | 19 +++++++++++++++++++ 2 files changed, 21 insertions(+)
diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h index 6268f89c5a48..118cef76f84f 100644 --- a/include/drm/drm_gem_ttm_helper.h +++ b/include/drm/drm_gem_ttm_helper.h @@ -15,5 +15,7 @@
void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent, const struct drm_gem_object *gem); +int drm_gem_ttm_mmap(struct drm_gem_object *gem, + struct vm_area_struct *vma);
#endif diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c index 9a4bafcf20df..34ce6cf78b35 100644 --- a/drivers/gpu/drm/drm_gem_ttm_helper.c +++ b/drivers/gpu/drm/drm_gem_ttm_helper.c @@ -52,5 +52,24 @@ void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent, } EXPORT_SYMBOL(drm_gem_ttm_print_info);
+/** + * drm_gem_ttm_mmap() - mmap &ttm_buffer_object + * @gem: GEM object. + * @vma: vm area. + * + * This function can be used as &drm_gem_object_funcs.mmap + * callback. + */ +int drm_gem_ttm_mmap(struct drm_gem_object *gem, + struct vm_area_struct *vma) +{ + struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem); + + ttm_bo_get(bo); + ttm_bo_mmap_vma_setup(bo, vma); + return 0; +} +EXPORT_SYMBOL(drm_gem_ttm_mmap); + MODULE_DESCRIPTION("DRM gem ttm helpers"); MODULE_LICENSE("GPL");