drm/ttm/radeon: add dma32 support.
This add support for using dma32 memory on gpus that really need it.
Currently IGPs are left without DMA32 but we might need to change
that unless we can fix rs690.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 75dc8bd..81ab81f 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -131,10 +131,15 @@
static struct page *ttm_tt_alloc_page(unsigned page_flags)
{
- if (page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
- return alloc_page(GFP_HIGHUSER | __GFP_ZERO);
+ gfp_t gfp_flags = GFP_HIGHUSER;
- return alloc_page(GFP_HIGHUSER);
+ if (page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
+ gfp_flags |= __GFP_ZERO;
+
+ if (page_flags & TTM_PAGE_FLAG_DMA32)
+ gfp_flags |= __GFP_DMA32;
+
+ return alloc_page(gfp_flags);
}
static void ttm_tt_free_user_pages(struct ttm_tt *ttm)