1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index e5b2cf10cbf..8389b4c63d1 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -589,6 +589,20 @@ void radeon_ttm_fini(struct radeon_device *rdev)
         DRM_INFO("radeon: ttm finalized\n");
 }
 
+/* this should only be called at bootup or when userspace
+ * isn't running */
+void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size)
+{
+        struct ttm_mem_type_manager *man;
+
+        if (!rdev->mman.initialized)
+                return;
+
+        man = &rdev->mman.bdev.man[TTM_PL_VRAM];
+        /* this just adjusts TTM size idea, which sets lpfn to the correct value */
+        man->size = size >> PAGE_SHIFT;
+}
+
 static struct vm_operations_struct radeon_ttm_vm_ops;
 static const struct vm_operations_struct *ttm_vm_ops = NULL;