diff mbox series

[RFC,net-next,12/14] net: mscc: ocelot: relax ocelot_exclusive_mac_etype_filter_rules()

Message ID 20200925121855.370863-13-vladimir.oltean@nxp.com
State RFC
Delegated to: David Miller
Headers show
Series Offload tc-flower using VCAP chains | expand

Commit Message

Vladimir Oltean Sept. 25, 2020, 12:18 p.m. UTC
The issue which led to the introduction of this check was that MAC_ETYPE
rules, such as filters on dst_mac and src_mac, would only match non-IP
frames. There is a knob in VCAP_S2_CFG which forces all IP frames to be
treated as non-IP, which is what we're currently doing if the user
requested a dst_mac filter, in order to maintain sanity.

But that knob is actually per IS2 lookup. And the good thing with
exposing the lookups to the user via tc chains is that we're now able to
offload MAC_ETYPE keys to one lookup, and IP keys to the other lookup.
So let's do that.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/ethernet/mscc/ocelot_vcap.c | 36 +++++++++++++++----------
 1 file changed, 22 insertions(+), 14 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mscc/ocelot_vcap.c b/drivers/net/ethernet/mscc/ocelot_vcap.c
index dbc11db0c984..798134666586 100644
--- a/drivers/net/ethernet/mscc/ocelot_vcap.c
+++ b/drivers/net/ethernet/mscc/ocelot_vcap.c
@@ -1045,23 +1045,23 @@  ocelot_vcap_block_find_filter_by_id(struct ocelot_vcap_block *block, int id)
  * on any _other_ keys than MAC_ETYPE ones.
  */
 static void ocelot_match_all_as_mac_etype(struct ocelot *ocelot, int port,
-					  bool on)
+					  int lookup, bool on)
 {
 	u32 val = 0;
 
 	if (on)
-		val = ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(3) |
-		      ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(3) |
-		      ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(3) |
-		      ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(3) |
-		      ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(3);
+		val = ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) |
+		      ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) |
+		      ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) |
+		      ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) |
+		      ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup));
 
 	ocelot_rmw_gix(ocelot, val,
-		       ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS_M |
-		       ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS_M |
-		       ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS_M |
-		       ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS_M |
-		       ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS_M,
+		       ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) |
+		       ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) |
+		       ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) |
+		       ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) |
+		       ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup)),
 		       ANA_PORT_VCAP_S2_CFG, port);
 }
 
@@ -1112,30 +1112,38 @@  ocelot_exclusive_mac_etype_filter_rules(struct ocelot *ocelot,
 	unsigned long port;
 	int i;
 
+	/* We only have the S2_IP_TCPUDP_DIS set of knobs for VCAP IS2 */
+	if (filter->block_id != VCAP_IS2)
+		return true;
+
 	if (ocelot_vcap_is_problematic_mac_etype(filter)) {
 		/* Search for any non-MAC_ETYPE rules on the port */
 		for (i = 0; i < block->count; i++) {
 			tmp = ocelot_vcap_block_find_filter_by_index(block, i);
 			if (tmp->ingress_port_mask & filter->ingress_port_mask &&
+			    tmp->lookup == filter->lookup &&
 			    ocelot_vcap_is_problematic_non_mac_etype(tmp))
 				return false;
 		}
 
 		for_each_set_bit(port, &filter->ingress_port_mask,
 				 ocelot->num_phys_ports)
-			ocelot_match_all_as_mac_etype(ocelot, port, true);
+			ocelot_match_all_as_mac_etype(ocelot, port,
+						      filter->lookup, true);
 	} else if (ocelot_vcap_is_problematic_non_mac_etype(filter)) {
 		/* Search for any MAC_ETYPE rules on the port */
 		for (i = 0; i < block->count; i++) {
 			tmp = ocelot_vcap_block_find_filter_by_index(block, i);
 			if (tmp->ingress_port_mask & filter->ingress_port_mask &&
+			    tmp->lookup == filter->lookup &&
 			    ocelot_vcap_is_problematic_mac_etype(tmp))
 				return false;
 		}
 
 		for_each_set_bit(port, &filter->ingress_port_mask,
 				 ocelot->num_phys_ports)
-			ocelot_match_all_as_mac_etype(ocelot, port, false);
+			ocelot_match_all_as_mac_etype(ocelot, port,
+						      filter->lookup, false);
 	}
 
 	return true;
@@ -1150,7 +1158,7 @@  int ocelot_vcap_filter_add(struct ocelot *ocelot,
 
 	if (!ocelot_exclusive_mac_etype_filter_rules(ocelot, filter)) {
 		NL_SET_ERR_MSG_MOD(extack,
-				   "Cannot mix MAC_ETYPE with non-MAC_ETYPE rules");
+				   "Cannot mix MAC_ETYPE with non-MAC_ETYPE rules, use the other IS2 lookup");
 		return -EBUSY;
 	}