Merge branch 'lan966x-es0-vcap'

Horatiu Vultur says:

====================
net: lan966x: Add support for ES0 VCAP

Provide the Egress Stage 0 (ES0) VCAP (Versatile Content-Aware
Processor) support for the lan966x platform.

The ES0 VCAP has only 1 lookup which is accessible with a TC chain
id 10000000.

Currently only one action is support which is vlan pop. Also it is
possible to link the IS1 to ES0 using 'goto chain 10000000'.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Author: davem330

drivers/net/ethernet/microchip/lan966x/lan966x_main.h

@@ -101,6 +101,9 @@
 #define LAN966X_VCAP_CID_IS2_L1 VCAP_CID_INGRESS_STAGE2_L1 /* IS2 lookup 1 */
 #define LAN966X_VCAP_CID_IS2_MAX (VCAP_CID_INGRESS_STAGE2_L2 - 1) /* IS2 Max */
 
+#define LAN966X_VCAP_CID_ES0_L0 VCAP_CID_EGRESS_L0 /* ES0 lookup 0 */
+#define LAN966X_VCAP_CID_ES0_MAX (VCAP_CID_EGRESS_L1 - 1) /* ES0 Max */
+
 /* MAC table entry types.
  * ENTRYTYPE_NORMAL is subject to aging.
  * ENTRYTYPE_LOCKED is not subject to aging.

drivers/net/ethernet/microchip/lan966x/lan966x_regs.h

@@ -1471,12 +1471,27 @@ enum lan966x_target {
 /*      REW:PORT:PORT_CFG */
 #define REW_PORT_CFG(g)           __REG(TARGET_REW, 0, 1, 0, g, 10, 128, 8, 0, 1, 4)
 
+#define REW_PORT_CFG_ES0_EN                      BIT(4)
+#define REW_PORT_CFG_ES0_EN_SET(x)\
+	FIELD_PREP(REW_PORT_CFG_ES0_EN, x)
+#define REW_PORT_CFG_ES0_EN_GET(x)\
+	FIELD_GET(REW_PORT_CFG_ES0_EN, x)
+
 #define REW_PORT_CFG_NO_REWRITE                  BIT(0)
 #define REW_PORT_CFG_NO_REWRITE_SET(x)\
 	FIELD_PREP(REW_PORT_CFG_NO_REWRITE, x)
 #define REW_PORT_CFG_NO_REWRITE_GET(x)\
 	FIELD_GET(REW_PORT_CFG_NO_REWRITE, x)
 
+/*      REW:COMMON:STAT_CFG */
+#define REW_STAT_CFG              __REG(TARGET_REW, 0, 1, 3072, 0, 1, 528, 520, 0, 1, 4)
+
+#define REW_STAT_CFG_STAT_MODE                   GENMASK(1, 0)
+#define REW_STAT_CFG_STAT_MODE_SET(x)\
+	FIELD_PREP(REW_STAT_CFG_STAT_MODE, x)
+#define REW_STAT_CFG_STAT_MODE_GET(x)\
+	FIELD_GET(REW_STAT_CFG_STAT_MODE, x)
+
 /*      SYS:SYSTEM:RESET_CFG */
 #define SYS_RESET_CFG             __REG(TARGET_SYS, 0, 1, 4128, 0, 1, 168, 0, 0, 1, 4)
 

drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c

@@ -5,6 +5,8 @@
 #include "vcap_api_client.h"
 #include "vcap_tc.h"
 
+#define LAN966X_FORCE_UNTAGED	3
+
 static bool lan966x_tc_is_known_etype(struct vcap_tc_flower_parse_usage *st,
 				      u16 etype)
 {
@@ -29,6 +31,8 @@ static bool lan966x_tc_is_known_etype(struct vcap_tc_flower_parse_usage *st,
 			return true;
 		}
 		break;
+	case VCAP_TYPE_ES0:
+		return true;
 	default:
 		NL_SET_ERR_MSG_MOD(st->fco->common.extack,
 				   "VCAP type not supported");
@@ -318,6 +322,9 @@ static int lan966x_tc_set_actionset(struct vcap_admin *admin,
 	case VCAP_TYPE_IS2:
 		aset = VCAP_AFS_BASE_TYPE;
 		break;
+	case VCAP_TYPE_ES0:
+		aset = VCAP_AFS_VID;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -353,6 +360,10 @@ static int lan966x_tc_add_rule_link_target(struct vcap_admin *admin,
 		/* Add IS2 specific PAG key (for chaining rules from IS1) */
 		return vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_PAG,
 					     link_val, ~0);
+	case VCAP_TYPE_ES0:
+		/* Add ES0 specific ISDX key (for chaining rules from IS1) */
+		return vcap_rule_add_key_u32(vrule, VCAP_KF_ISDX_CLS,
+					     link_val, ~0);
 	default:
 		break;
 	}
@@ -389,6 +400,18 @@ static int lan966x_tc_add_rule_link(struct vcap_control *vctrl,
 					       0xff);
 		if (err)
 			return err;
+	} else if (admin->vtype == VCAP_TYPE_IS1 &&
+		   to_admin->vtype == VCAP_TYPE_ES0) {
+		/* This works for IS1->ES0 */
+		err = vcap_rule_add_action_u32(vrule, VCAP_AF_ISDX_ADD_VAL,
+					       diff);
+		if (err)
+			return err;
+
+		err = vcap_rule_add_action_bit(vrule, VCAP_AF_ISDX_REPLACE_ENA,
+					       VCAP_BIT_1);
+		if (err)
+			return err;
 	} else {
 		NL_SET_ERR_MSG_MOD(f->common.extack,
 				   "Unsupported chain destination");
@@ -398,6 +421,23 @@ static int lan966x_tc_add_rule_link(struct vcap_control *vctrl,
 	return err;
 }
 
+static int lan966x_tc_add_rule_counter(struct vcap_admin *admin,
+				       struct vcap_rule *vrule)
+{
+	int err = 0;
+
+	switch (admin->vtype) {
+	case VCAP_TYPE_ES0:
+		err = vcap_rule_mod_action_u32(vrule, VCAP_AF_ESDX,
+					       vrule->id);
+		break;
+	default:
+		break;
+	}
+
+	return err;
+}
+
 static int lan966x_tc_flower_add(struct lan966x_port *port,
 				 struct flow_cls_offload *f,
 				 struct vcap_admin *admin,
@@ -465,6 +505,21 @@ static int lan966x_tc_flower_add(struct lan966x_port *port,
 			if (err)
 				goto out;
 
+			break;
+		case FLOW_ACTION_VLAN_POP:
+			if (admin->vtype != VCAP_TYPE_ES0) {
+				NL_SET_ERR_MSG_MOD(f->common.extack,
+						   "Cannot use vlan pop on non es0");
+				err = -EOPNOTSUPP;
+				goto out;
+			}
+
+			/* Force untag */
+			err = vcap_rule_add_action_u32(vrule, VCAP_AF_PUSH_OUTER_TAG,
+						       LAN966X_FORCE_UNTAGED);
+			if (err)
+				goto out;
+
 			break;
 		default:
 			NL_SET_ERR_MSG_MOD(f->common.extack,
@@ -474,6 +529,12 @@ static int lan966x_tc_flower_add(struct lan966x_port *port,
 		}
 	}
 
+	err = lan966x_tc_add_rule_counter(admin, vrule);
+	if (err) {
+		vcap_set_tc_exterr(f, vrule);
+		goto out;
+	}
+
 	err = vcap_val_rule(vrule, l3_proto);
 	if (err) {
 		vcap_set_tc_exterr(f, vrule);