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-rw-r--r--src/gallium/drivers/radeon/radeon_winsys.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeon/radeon_winsys.h b/src/gallium/drivers/radeon/radeon_winsys.h
index d0705d66bcd..e8fc6d62c43 100644
--- a/src/gallium/drivers/radeon/radeon_winsys.h
+++ b/src/gallium/drivers/radeon/radeon_winsys.h
@@ -506,6 +506,9 @@ struct radeon_winsys {
/**
* Return the virtual address of a buffer.
*
+ * When virtual memory is not in use, this is the offset relative to the
+ * relocation base (non-zero for sub-allocated buffers).
+ *
* \param buf A winsys buffer object
* \return virtual address
*/