diff --git a/headers/private/graphics/nvidia/DriverInterface.h b/headers/private/graphics/nvidia/DriverInterface.h
index 6f8f3d5aab..1ac56df8b6 100644
--- a/headers/private/graphics/nvidia/DriverInterface.h
+++ b/headers/private/graphics/nvidia/DriverInterface.h
@@ -145,14 +145,14 @@ typedef struct {
 							space. */
 
 	area_id	fb_area;	/* Frame buffer's area_id.  The addresses are shared with all teams. */
-	area_id	dma_buffer_area;	/* Area assigned for DMA. It will be cloned into the accelerant's
-									address	space.*/
+	area_id	unaligned_dma_area;	/* Area assigned for DMA. It will be (partially) mapped to an
+									aligned area using MTRR-WC. */
+	area_id	dma_area;	/* Aligned area assigned for DMA. The addresses are shared with all teams. */
 
 	void	*framebuffer;		/* As viewed from virtual memory */
 	void	*framebuffer_pci;	/* As viewed from the PCI bus (for DMA) */
-
 	void	*dma_buffer;		/* As viewed from virtual memory */
-	void	*dma_buffer_pci;	/* As viewed from the PCI bus */
+	void	*dma_buffer_pci;	/* As viewed from the PCI bus (for DMA) */
 
   /*screenmode list*/
 	area_id	mode_area;              /* Contains the list of display modes the driver supports */
@@ -198,7 +198,6 @@ typedef struct {
 			uint32	ch_ptr[0x20];	/* cmd handle's ptr to it's assigned FIFO ch (if any) */
 		} fifo;
 		struct {
-			uint32 *cmdbuffer;	/* (physical) location of DMA command buffer */
 			uint32 put;			/* last 32-bit-word adress given to engine to exec. to */
 			uint32 current;		/* first free 32-bit-word adress in buffer */
 			uint32 free;		/* nr. of useable free 32-bit words remaining in buffer */