sky2: optimize transmit completion
Don't reference the list element in hardware transmit ring on transmit
completion. The list element is updated by hardware, therefore
it causes a cache miss. Do book keeping in software structure.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 2c262f7..9d07a46 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -1984,6 +1984,9 @@
struct tx_ring_info {
struct sk_buff *skb;
+ unsigned long flags;
+#define TX_MAP_SINGLE 0x0001
+#define TX_MAP_PAGE 000002
DECLARE_PCI_UNMAP_ADDR(mapaddr);
DECLARE_PCI_UNMAP_LEN(maplen);
};