bnx2x: handle iSCSI SD mode

in iSCSI SD mode to bnx2x device assigned single mac address
which is supposted to be iscsi mac. If this mode is recognized
bnx2x will disable LRO, decrease number of queues to 1 and rx ring
size to the minumum allowed by FW, this in order minimize memory use.
It will tranfer mac for iscsi usage and zero primary mac of the netdev.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
index 0f7b7a4..6c7bd63 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
@@ -2084,4 +2084,16 @@
 
 void bnx2x_set_ethtool_ops(struct net_device *netdev);
 void bnx2x_notify_link_changed(struct bnx2x *bp);
+
+
+#define BNX2X_MF_PROTOCOL(bp) \
+	((bp)->mf_config[BP_VN(bp)] & FUNC_MF_CFG_PROTOCOL_MASK)
+
+#ifdef BCM_CNIC
+#define BNX2X_IS_MF_PROTOCOL_ISCSI(bp) \
+	(BNX2X_MF_PROTOCOL(bp) == FUNC_MF_CFG_PROTOCOL_ISCSI)
+
+#define IS_MF_ISCSI_SD(bp) (IS_MF_SD(bp) && BNX2X_IS_MF_PROTOCOL_ISCSI(bp))
+#endif
+
 #endif /* bnx2x.h */