igb: add DCA support

Add DCA support in the similar method that it was added to the ixgbe
driver recently. DCA allows the network device to put data in the
CPU cache and notify the chipset of that event. This reduces cache
misses during receives.

Signed-off-by: Jeb Cramer <cramerj@intel.com>
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/igb/e1000_regs.h b/drivers/net/igb/e1000_regs.h
index ff187b73c69e..d25e914df975 100644
--- a/drivers/net/igb/e1000_regs.h
+++ b/drivers/net/igb/e1000_regs.h
@@ -235,6 +235,8 @@
 #define E1000_FACTPS    0x05B30 /* Function Active and Power State to MNG */
 #define E1000_SWSM      0x05B50 /* SW Semaphore */
 #define E1000_FWSM      0x05B54 /* FW Semaphore */
+#define E1000_DCA_ID    0x05B70 /* DCA Requester ID Information - RO */
+#define E1000_DCA_CTRL  0x05B74 /* DCA Control - RW */
 #define E1000_HICR      0x08F00 /* Host Inteface Control */
 
 /* RSS registers */