[dpdk-dev] [PATCH v2] net/ice: optimize the FlexiMD hardware check

[Haiyue Wang]

The Flexible Metadata #4 and #5 in the Rx Flex Descriptor are defined to
extract the protocol specified fields or its offset. Its function relays
on the DDP package support in hardware.

Optimize to only check the hardware support when the user specifies the
'proto_xtr' devargs. And not require all the types need to be support in
hardware, otherwise if new protocol extraction type is introduced, it is
hard to maintain the compatibility. Just check the type support in need.

And the protocol IDs are 8 bits length, so the uint8_t is the right type
to be used. Also introduce the 'opcode' variable to specify the metadata
extraction type: it can be protocol fields or offset report.

Signed-off-by: Haiyue Wang <haiyue.wang at intel.com>
---
v2: update the commit title and message.
---
 drivers/net/ice/ice_ethdev.c | 66 ++++++++++++++++++++++--------------
 drivers/net/ice/ice_ethdev.h |  1 +
 2 files changed, 42 insertions(+), 25 deletions(-)

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index 8d435e889..d67390f29 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -47,6 +47,8 @@ struct proto_xtr_ol_flag {
 	bool required;
 };
 
+static bool ice_proto_xtr_hw_support[PROTO_XTR_MAX];
+
 static struct proto_xtr_ol_flag ice_proto_xtr_ol_flag_params[] = {
 	[PROTO_XTR_VLAN] = {
 		.param = { .name = "ice_dynflag_proto_xtr_vlan" },
@@ -536,25 +538,36 @@ handle_proto_xtr_arg(__rte_unused const char *key, const char *value,
 	return 0;
 }
 
-static bool
-ice_proto_xtr_support(struct ice_hw *hw)
+static void
+ice_check_proto_xtr_support(struct ice_hw *hw)
 {
 #define FLX_REG(val, fld, idx) \
 	(((val) & GLFLXP_RXDID_FLX_WRD_##idx##_##fld##_M) >> \
 	 GLFLXP_RXDID_FLX_WRD_##idx##_##fld##_S)
 	static struct {
 		uint32_t rxdid;
-		uint16_t protid_0;
-		uint16_t protid_1;
+		uint8_t opcode;
+		uint8_t protid_0;
+		uint8_t protid_1;
 	} xtr_sets[] = {
-		{ ICE_RXDID_COMMS_AUX_VLAN, ICE_PROT_EVLAN_O, ICE_PROT_VLAN_O },
-		{ ICE_RXDID_COMMS_AUX_IPV4, ICE_PROT_IPV4_OF_OR_S,
-		  ICE_PROT_IPV4_OF_OR_S },
-		{ ICE_RXDID_COMMS_AUX_IPV6, ICE_PROT_IPV6_OF_OR_S,
-		  ICE_PROT_IPV6_OF_OR_S },
-		{ ICE_RXDID_COMMS_AUX_IPV6_FLOW, ICE_PROT_IPV6_OF_OR_S,
-		  ICE_PROT_IPV6_OF_OR_S },
-		{ ICE_RXDID_COMMS_AUX_TCP, ICE_PROT_TCP_IL, ICE_PROT_ID_INVAL },
+		[PROTO_XTR_VLAN] = { ICE_RXDID_COMMS_AUX_VLAN,
+				     ICE_RX_OPC_EXTRACT,
+				     ICE_PROT_EVLAN_O, ICE_PROT_VLAN_O},
+		[PROTO_XTR_IPV4] = { ICE_RXDID_COMMS_AUX_IPV4,
+				     ICE_RX_OPC_EXTRACT,
+				     ICE_PROT_IPV4_OF_OR_S,
+				     ICE_PROT_IPV4_OF_OR_S },
+		[PROTO_XTR_IPV6] = { ICE_RXDID_COMMS_AUX_IPV6,
+				     ICE_RX_OPC_EXTRACT,
+				     ICE_PROT_IPV6_OF_OR_S,
+				     ICE_PROT_IPV6_OF_OR_S },
+		[PROTO_XTR_IPV6_FLOW] = { ICE_RXDID_COMMS_AUX_IPV6_FLOW,
+					  ICE_RX_OPC_EXTRACT,
+					  ICE_PROT_IPV6_OF_OR_S,
+					  ICE_PROT_IPV6_OF_OR_S },
+		[PROTO_XTR_TCP] = { ICE_RXDID_COMMS_AUX_TCP,
+				    ICE_RX_OPC_EXTRACT,
+				    ICE_PROT_TCP_IL, ICE_PROT_ID_INVAL },
 	};
 	uint32_t i;
 
@@ -565,21 +578,19 @@ ice_proto_xtr_support(struct ice_hw *hw)
 		if (xtr_sets[i].protid_0 != ICE_PROT_ID_INVAL) {
 			v = ICE_READ_REG(hw, GLFLXP_RXDID_FLX_WRD_4(rxdid));
 
-			if (FLX_REG(v, PROT_MDID, 4) != xtr_sets[i].protid_0 ||
-			    FLX_REG(v, RXDID_OPCODE, 4) != ICE_RX_OPC_EXTRACT)
-				return false;
+			if (FLX_REG(v, PROT_MDID, 4) == xtr_sets[i].protid_0 &&
+			    FLX_REG(v, RXDID_OPCODE, 4) == xtr_sets[i].opcode)
+				ice_proto_xtr_hw_support[i] = true;
 		}
 
 		if (xtr_sets[i].protid_1 != ICE_PROT_ID_INVAL) {
 			v = ICE_READ_REG(hw, GLFLXP_RXDID_FLX_WRD_5(rxdid));
 
-			if (FLX_REG(v, PROT_MDID, 5) != xtr_sets[i].protid_1 ||
-			    FLX_REG(v, RXDID_OPCODE, 5) != ICE_RX_OPC_EXTRACT)
-				return false;
+			if (FLX_REG(v, PROT_MDID, 5) == xtr_sets[i].protid_1 &&
+			    FLX_REG(v, RXDID_OPCODE, 5) == xtr_sets[i].opcode)
+				ice_proto_xtr_hw_support[i] = true;
 		}
 	}
-
-	return true;
 }
 
 static int
@@ -1416,11 +1427,6 @@ ice_init_proto_xtr(struct rte_eth_dev *dev)
 	int offset;
 	uint16_t i;
 
-	if (!ice_proto_xtr_support(hw)) {
-		PMD_DRV_LOG(NOTICE, "Protocol extraction is not supported");
-		return;
-	}
-
 	pf->proto_xtr = rte_zmalloc(NULL, pf->lan_nb_qps, 0);
 	if (unlikely(pf->proto_xtr == NULL)) {
 		PMD_DRV_LOG(ERR, "No memory for setting up protocol extraction table");
@@ -1443,6 +1449,8 @@ ice_init_proto_xtr(struct rte_eth_dev *dev)
 	if (likely(!proto_xtr_enable))
 		return;
 
+	ice_check_proto_xtr_support(hw);
+
 	offset = rte_mbuf_dynfield_register(&ice_proto_xtr_metadata_param);
 	if (unlikely(offset == -1)) {
 		PMD_DRV_LOG(ERR,
@@ -1462,6 +1470,14 @@ ice_init_proto_xtr(struct rte_eth_dev *dev)
 		if (!ol_flag->required)
 			continue;
 
+		if (!ice_proto_xtr_hw_support[i]) {
+			PMD_DRV_LOG(ERR,
+				    "Protocol extraction type %u is not supported in hardware",
+				    i);
+			rte_net_ice_dynfield_proto_xtr_metadata_offs = -1;
+			break;
+		}
+
 		offset = rte_mbuf_dynflag_register(&ol_flag->param);
 		if (unlikely(offset == -1)) {
 			PMD_DRV_LOG(ERR,
diff --git a/drivers/net/ice/ice_ethdev.h b/drivers/net/ice/ice_ethdev.h
index 393dfeab1..06b9b8683 100644
--- a/drivers/net/ice/ice_ethdev.h
+++ b/drivers/net/ice/ice_ethdev.h
@@ -262,6 +262,7 @@ enum proto_xtr_type {
 	PROTO_XTR_IPV6,
 	PROTO_XTR_IPV6_FLOW,
 	PROTO_XTR_TCP,
+	PROTO_XTR_MAX /* The last one */
 };
 
 enum ice_fdir_tunnel_type {
-- 
2.28.0