[dpdk-dev] [PATCH v3 12/12] net/sfc: support port representor flow item

[Ivan Malov <ivan.malov@oktetlabs.ru>]

From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

Add support for item PORT_REPRESENTOR which should
be used instead of ambiguous item PORT_ID.

Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
---
 doc/guides/nics/sfc_efx.rst |  2 ++
 drivers/net/sfc/sfc_mae.c   | 72 +++++++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)

diff --git a/doc/guides/nics/sfc_efx.rst b/doc/guides/nics/sfc_efx.rst
index 163bc2533f..9a9710325f 100644
--- a/doc/guides/nics/sfc_efx.rst
+++ b/doc/guides/nics/sfc_efx.rst
@@ -190,6 +190,8 @@ Supported actions (***non-transfer*** rules):
 
 Supported pattern items (***transfer*** rules):
 
+- PORT_REPRESENTOR (cannot repeat; conflicts with other traffic source items)
+
 - PORT_ID (cannot repeat; conflicts with other traffic source items)
 
 - PHY_PORT (cannot repeat; conflicts with other traffic source items)
diff --git a/drivers/net/sfc/sfc_mae.c b/drivers/net/sfc/sfc_mae.c
index 4b520bc619..392f6ec098 100644
--- a/drivers/net/sfc/sfc_mae.c
+++ b/drivers/net/sfc/sfc_mae.c
@@ -1100,6 +1100,66 @@ sfc_mae_rule_parse_item_port_id(const struct rte_flow_item *item,
 	return 0;
 }
 
+static int
+sfc_mae_rule_parse_item_port_representor(const struct rte_flow_item *item,
+					 struct sfc_flow_parse_ctx *ctx,
+					 struct rte_flow_error *error)
+{
+	struct sfc_mae_parse_ctx *ctx_mae = ctx->mae;
+	const struct rte_flow_item_ethdev supp_mask = {
+		.port_id = 0xffff,
+	};
+	const void *def_mask = &rte_flow_item_ethdev_mask;
+	const struct rte_flow_item_ethdev *spec = NULL;
+	const struct rte_flow_item_ethdev *mask = NULL;
+	efx_mport_sel_t mport_sel;
+	int rc;
+
+	if (ctx_mae->match_mport_set) {
+		return rte_flow_error_set(error, ENOTSUP,
+				RTE_FLOW_ERROR_TYPE_ITEM, item,
+				"Can't handle multiple traffic source items");
+	}
+
+	rc = sfc_flow_parse_init(item,
+				 (const void **)&spec, (const void **)&mask,
+				 (const void *)&supp_mask, def_mask,
+				 sizeof(struct rte_flow_item_ethdev), error);
+	if (rc != 0)
+		return rc;
+
+	if (mask->port_id != supp_mask.port_id) {
+		return rte_flow_error_set(error, EINVAL,
+				RTE_FLOW_ERROR_TYPE_ITEM, item,
+				"Bad mask in the PORT_REPRESENTOR pattern item");
+	}
+
+	/* If "spec" is not set, could be any port ID */
+	if (spec == NULL)
+		return 0;
+
+	rc = sfc_mae_switch_port_by_ethdev(
+			ctx_mae->sa->mae.switch_domain_id,
+			spec->port_id, &mport_sel);
+	if (rc != 0) {
+		return rte_flow_error_set(error, rc,
+				RTE_FLOW_ERROR_TYPE_ITEM, item,
+				"Can't find RTE ethdev by the port ID");
+	}
+
+	rc = efx_mae_match_spec_mport_set(ctx_mae->match_spec,
+					  &mport_sel, NULL);
+	if (rc != 0) {
+		return rte_flow_error_set(error, rc,
+				RTE_FLOW_ERROR_TYPE_ITEM, item,
+				"Failed to set MPORT for the port ID");
+	}
+
+	ctx_mae->match_mport_set = B_TRUE;
+
+	return 0;
+}
+
 static int
 sfc_mae_rule_parse_item_phy_port(const struct rte_flow_item *item,
 				 struct sfc_flow_parse_ctx *ctx,
@@ -1995,6 +2055,18 @@ static const struct sfc_flow_item sfc_flow_items[] = {
 		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
 		.parse = sfc_mae_rule_parse_item_port_id,
 	},
+	{
+		.type = RTE_FLOW_ITEM_TYPE_PORT_REPRESENTOR,
+		.name = "PORT_REPRESENTOR",
+		/*
+		 * In terms of RTE flow, this item is a META one,
+		 * and its position in the pattern is don't care.
+		 */
+		.prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
+		.layer = SFC_FLOW_ITEM_ANY_LAYER,
+		.ctx_type = SFC_FLOW_PARSE_CTX_MAE,
+		.parse = sfc_mae_rule_parse_item_port_representor,
+	},
 	{
 		.type = RTE_FLOW_ITEM_TYPE_PHY_PORT,
 		.name = "PHY_PORT",
-- 
2.20.1