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>

diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index be311e9..46d5c0e 100644 (file)
--- a/drivers/net/pasemi_mac.c
+++ b/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;
 

diff --git a/drivers/net/pasemi_mac.h b/drivers/net/pasemi_mac.h
index ef44364..fbbc17a 100644 (file)
--- a/drivers/net/pasemi_mac.h
+++ b/drivers/net/pasemi_mac.h
@@ -219,6 +219,14 @@ enum {
 #define    PAS_DMA_RXINT_RCMDSTA_ACT   0x00010000
 #define    PAS_DMA_RXINT_RCMDSTA_DROPS_M       0xfffe0000
 #define    PAS_DMA_RXINT_RCMDSTA_DROPS_S       17
+#define PAS_DMA_RXINT_CFG(i)           (0x204+(i)*_PAS_DMA_RXINT_STRIDE)
+#define    PAS_DMA_RXINT_CFG_DHL_M     0x07000000
+#define    PAS_DMA_RXINT_CFG_DHL_S     24
+#define    PAS_DMA_RXINT_CFG_DHL(x)    (((x) << PAS_DMA_RXINT_CFG_DHL_S) & \
+                                        PAS_DMA_RXINT_CFG_DHL_M)
+#define    PAS_DMA_RXINT_CFG_WIF       0x00000002
+#define    PAS_DMA_RXINT_CFG_WIL       0x00000001
+
 #define PAS_DMA_RXINT_INCR(i)          (0x210+(i)*_PAS_DMA_RXINT_STRIDE)
 #define    PAS_DMA_RXINT_INCR_INCR_M   0x0000ffff
 #define    PAS_DMA_RXINT_INCR_INCR_S   0