cxgb4: Add API to correctly calculate tuple fields

Adds API cxgb4_select_ntuple so as to enable Upper Level Drivers to correctly
calculate the tuple fields.

Adds constant definitions for TP_VLAN_PRI_MAP for the Compressed
Filter Tuple field widths and structures and uses them.

Also, the CPL Parameters field for T5 is 40 bits so we need to prototype
cxgb4_select_ntuple() to calculate and return u64 values.

Based on original work by Casey Leedom <leedom@chelsio.com>

Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/l2t.c b/drivers/net/ethernet/chelsio/cxgb4/l2t.c
index 29878098101e..cb05be905def 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/l2t.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/l2t.c
@@ -45,6 +45,7 @@
 #include "l2t.h"
 #include "t4_msg.h"
 #include "t4fw_api.h"
+#include "t4_regs.h"
 
 #define VLAN_NONE 0xfff
 
@@ -411,6 +412,40 @@ done:
 }
 EXPORT_SYMBOL(cxgb4_l2t_get);
 
+u64 cxgb4_select_ntuple(struct net_device *dev,
+			const struct l2t_entry *l2t)
+{
+	struct adapter *adap = netdev2adap(dev);
+	struct tp_params *tp = &adap->params.tp;
+	u64 ntuple = 0;
+
+	/* Initialize each of the fields which we care about which are present
+	 * in the Compressed Filter Tuple.
+	 */
+	if (tp->vlan_shift >= 0 && l2t->vlan != VLAN_NONE)
+		ntuple |= (F_FT_VLAN_VLD | l2t->vlan) << tp->vlan_shift;
+
+	if (tp->port_shift >= 0)
+		ntuple |= (u64)l2t->lport << tp->port_shift;
+
+	if (tp->protocol_shift >= 0)
+		ntuple |= (u64)IPPROTO_TCP << tp->protocol_shift;
+
+	if (tp->vnic_shift >= 0) {
+		u32 viid = cxgb4_port_viid(dev);
+		u32 vf = FW_VIID_VIN_GET(viid);
+		u32 pf = FW_VIID_PFN_GET(viid);
+		u32 vld = FW_VIID_VIVLD_GET(viid);
+
+		ntuple |= (u64)(V_FT_VNID_ID_VF(vf) |
+				V_FT_VNID_ID_PF(pf) |
+				V_FT_VNID_ID_VLD(vld)) << tp->vnic_shift;
+	}
+
+	return ntuple;
+}
+EXPORT_SYMBOL(cxgb4_select_ntuple);
+
 /*
  * Called when address resolution fails for an L2T entry to handle packets
  * on the arpq head.  If a packet specifies a failure handler it is invoked,