pasemi_mac: Enable L2 caching of packet headers

Enable settings to target l2 for the first few cachelines of the packet, since
we'll access them to get to the various headers.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/pasemi_mac.c

@@ -206,7 +206,7 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 			   PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
 
 	write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id),
-			   PAS_DMA_RXCHAN_CFG_HBU(1));
+			   PAS_DMA_RXCHAN_CFG_HBU(2));
 
 	write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
 			   PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
@@ -215,6 +215,9 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev)
 			   PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
 			   PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
 
+	write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if),
+			   PAS_DMA_RXINT_CFG_DHL(2));
+
 	ring->next_to_fill = 0;
 	ring->next_to_clean = 0;