netdev - [PATCH net-next 2/4] sfc: populate enc_ip

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Date:   Fri, 21 Apr 2023 15:19:52 +0100
From:   <edward.cree@....com>
To:     <linux-net-drivers@....com>, <davem@...emloft.net>,
        <kuba@...nel.org>, <pabeni@...hat.com>, <edumazet@...gle.com>
CC:     Edward Cree <ecree.xilinx@...il.com>, <netdev@...r.kernel.org>,
        <habetsm.xilinx@...il.com>,
        Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@....com>
Subject: [PATCH net-next 2/4] sfc: populate enc_ip_tos matches in MAE outer rules

From: Edward Cree <ecree.xilinx@...il.com>

Currently tc.c will block them before they get here, but following
 patch will change that.
Use the extack message from efx_mae_check_encap_match_caps() instead
 of writing a new one, since there's now more being fed in than just
 an IP version.

Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@....com>
Signed-off-by: Edward Cree <ecree.xilinx@...il.com>
---
 drivers/net/ethernet/sfc/mae.c | 16 +++++++++++++++-
 drivers/net/ethernet/sfc/mae.h |  1 +
 drivers/net/ethernet/sfc/tc.c  |  9 +++------
 3 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/sfc/mae.c b/drivers/net/ethernet/sfc/mae.c
index 49706a7b94bf..8f4bb5d36ad8 100644
--- a/drivers/net/ethernet/sfc/mae.c
+++ b/drivers/net/ethernet/sfc/mae.c
@@ -482,12 +482,14 @@ int efx_mae_match_check_caps(struct efx_nic *efx,
 	rc;								       \
 })
 /* Checks that the fields needed for encap-rule matches are supported by the
- * MAE.  All the fields are exact-match.
+ * MAE.  All the fields are exact-match, except possibly ENC_IP_TOS.
  */
 int efx_mae_check_encap_match_caps(struct efx_nic *efx, bool ipv6,
+				   u8 ip_tos_mask,
 				   struct netlink_ext_ack *extack)
 {
 	u8 *supported_fields = efx->tc->caps->outer_rule_fields;
+	enum mask_type typ;
 	int rc;
 
 	if (CHECK(ENC_ETHER_TYPE))
@@ -504,6 +506,14 @@ int efx_mae_check_encap_match_caps(struct efx_nic *efx, bool ipv6,
 	if (CHECK(ENC_L4_DPORT) ||
 	    CHECK(ENC_IP_PROTO))
 		return rc;
+	typ = classify_mask(&ip_tos_mask, sizeof(ip_tos_mask));
+	rc = efx_mae_match_check_cap_typ(supported_fields[MAE_FIELD_ENC_IP_TOS],
+					 typ);
+	if (rc) {
+		NL_SET_ERR_MSG_FMT_MOD(extack, "No support for %s mask in field %s",
+				       mask_type_name(typ), "enc_ip_tos");
+		return rc;
+	}
 	return 0;
 }
 #undef CHECK
@@ -1003,6 +1013,10 @@ int efx_mae_register_encap_match(struct efx_nic *efx,
 				~(__be16)0);
 	MCDI_STRUCT_SET_BYTE(match_crit, MAE_ENC_FIELD_PAIRS_ENC_IP_PROTO, IPPROTO_UDP);
 	MCDI_STRUCT_SET_BYTE(match_crit, MAE_ENC_FIELD_PAIRS_ENC_IP_PROTO_MASK, ~0);
+	MCDI_STRUCT_SET_BYTE(match_crit, MAE_ENC_FIELD_PAIRS_ENC_IP_TOS,
+			     encap->ip_tos);
+	MCDI_STRUCT_SET_BYTE(match_crit, MAE_ENC_FIELD_PAIRS_ENC_IP_TOS_MASK,
+			     encap->ip_tos_mask);
 	rc = efx_mcdi_rpc(efx, MC_CMD_MAE_OUTER_RULE_INSERT, inbuf,
 			  sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);
 	if (rc)
diff --git a/drivers/net/ethernet/sfc/mae.h b/drivers/net/ethernet/sfc/mae.h
index 9226219491a0..cec61bfde4d4 100644
--- a/drivers/net/ethernet/sfc/mae.h
+++ b/drivers/net/ethernet/sfc/mae.h
@@ -82,6 +82,7 @@ int efx_mae_match_check_caps(struct efx_nic *efx,
 			     const struct efx_tc_match_fields *mask,
 			     struct netlink_ext_ack *extack);
 int efx_mae_check_encap_match_caps(struct efx_nic *efx, bool ipv6,
+				   u8 ip_tos_mask,
 				   struct netlink_ext_ack *extack);
 int efx_mae_check_encap_type_supported(struct efx_nic *efx,
 				       enum efx_encap_type typ);
diff --git a/drivers/net/ethernet/sfc/tc.c b/drivers/net/ethernet/sfc/tc.c
index 236b44a4215e..c2dda3ae5492 100644
--- a/drivers/net/ethernet/sfc/tc.c
+++ b/drivers/net/ethernet/sfc/tc.c
@@ -410,12 +410,9 @@ static int efx_tc_flower_record_encap_match(struct efx_nic *efx,
 		return -EOPNOTSUPP;
 	}
 
-	rc = efx_mae_check_encap_match_caps(efx, ipv6, extack);
-	if (rc) {
-		NL_SET_ERR_MSG_FMT_MOD(extack, "MAE hw reports no support for IPv%d encap matches",
-				       ipv6 ? 6 : 4);
-		return -EOPNOTSUPP;
-	}
+	rc = efx_mae_check_encap_match_caps(efx, ipv6, match->mask.enc_ip_tos, extack);
+	if (rc)
+		return rc;
 
 	encap = kzalloc(sizeof(*encap), GFP_USER);
 	if (!encap)