Merge branch 'mlxsw-spectrum_router-Add-GRE-tunnel-support-for-Spectr…

…um-2'

Ido Schimmel says:

====================
mlxsw: spectrum_router: Add GRE tunnel support for Spectrum-2

Nir says:

In Spectrum-2, HW implementation of layer 3 tunnels differs from
Spectrum-1 when it comes to the underlay routing table selection.
Spectrum-2 uses a dedicated RIF that points to the virtual router used
for forwarding the encapsulated packets, while Spectrum-1 explicitly
specifies the virtual router itself.

Patches #1 and #2 add additional fields in RITR - Router interface table
register and RTDP - Routing tunnel decap properties respectively, the
fields are required for the new underlay RIF needed for Spectrum-2.

Patches #3-4 allow different set of RIF operations per ASIC type. The
first patch splits the operations and the following patch sets RIF ops
according to ASIC type.

Patches #5-9 introduce small changes to existing code to allow existence
of a dedicated underlay RIF along with the underlay virtual router, and
to support that new type of RIF that has no device.

Patch #10 takes care of updating the tunnel decap properties egress
underlay RIF required for Spectrum-2.

Patch #11 adds the implementation of Spectrum-2 specific RIF operations
and essentially enables layer 3 GRE tunnels on Spectrum-2.

Finally patches #12-18 add tests for GRE IP-in-IP tunnels, both in flat
and hierarchical topologies.
====================

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

drivers/net/ethernet/mellanox/mlxsw/reg.h

@@ -5666,6 +5666,8 @@ enum mlxsw_reg_ritr_loopback_protocol {
 	MLXSW_REG_RITR_LOOPBACK_PROTOCOL_IPIP_IPV4,
 	/* IPinIP IPv6 underlay Unicast */
 	MLXSW_REG_RITR_LOOPBACK_PROTOCOL_IPIP_IPV6,
+	/* IPinIP generic - used for Spectrum-2 underlay RIF */
+	MLXSW_REG_RITR_LOOPBACK_GENERIC,
 };
 
 /* reg_ritr_loopback_protocol
@@ -5706,6 +5708,13 @@ MLXSW_ITEM32(reg, ritr, loopback_ipip_options, 0x10, 20, 4);
  */
 MLXSW_ITEM32(reg, ritr, loopback_ipip_uvr, 0x10, 0, 16);
 
+/* reg_ritr_loopback_ipip_underlay_rif
+ * Underlay ingress router interface.
+ * Reserved for Spectrum.
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, ritr, loopback_ipip_underlay_rif, 0x14, 0, 16);
+
 /* reg_ritr_loopback_ipip_usip*
  * Encapsulation Underlay source IP.
  * Access: RW
@@ -5821,24 +5830,25 @@ static inline void
 mlxsw_reg_ritr_loopback_ipip_common_pack(char *payload,
 			    enum mlxsw_reg_ritr_loopback_ipip_type ipip_type,
 			    enum mlxsw_reg_ritr_loopback_ipip_options options,
-			    u16 uvr_id, u32 gre_key)
+			    u16 uvr_id, u16 underlay_rif, u32 gre_key)
 {
 	mlxsw_reg_ritr_loopback_ipip_type_set(payload, ipip_type);
 	mlxsw_reg_ritr_loopback_ipip_options_set(payload, options);
 	mlxsw_reg_ritr_loopback_ipip_uvr_set(payload, uvr_id);
+	mlxsw_reg_ritr_loopback_ipip_underlay_rif_set(payload, underlay_rif);
 	mlxsw_reg_ritr_loopback_ipip_gre_key_set(payload, gre_key);
 }
 
 static inline void
 mlxsw_reg_ritr_loopback_ipip4_pack(char *payload,
 			    enum mlxsw_reg_ritr_loopback_ipip_type ipip_type,
 			    enum mlxsw_reg_ritr_loopback_ipip_options options,
-			    u16 uvr_id, u32 usip, u32 gre_key)
+			    u16 uvr_id, u16 underlay_rif, u32 usip, u32 gre_key)
 {
 	mlxsw_reg_ritr_loopback_protocol_set(payload,
 				    MLXSW_REG_RITR_LOOPBACK_PROTOCOL_IPIP_IPV4);
 	mlxsw_reg_ritr_loopback_ipip_common_pack(payload, ipip_type, options,
-						 uvr_id, gre_key);
+						 uvr_id, underlay_rif, gre_key);
 	mlxsw_reg_ritr_loopback_ipip_usip4_set(payload, usip);
 }
 
@@ -7200,6 +7210,13 @@ MLXSW_ITEM32(reg, rtdp, type, 0x00, 28, 4);
  */
 MLXSW_ITEM32(reg, rtdp, tunnel_index, 0x00, 0, 24);
 
+/* reg_rtdp_egress_router_interface
+ * Underlay egress router interface.
+ * Valid range is from 0 to cap_max_router_interfaces - 1
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, rtdp, egress_router_interface, 0x40, 0, 16);
+
 /* IPinIP */
 
 /* reg_rtdp_ipip_irif

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -4094,6 +4094,7 @@ static int mlxsw_sp1_init(struct mlxsw_core *mlxsw_core,
 	mlxsw_sp->acl_tcam_ops = &mlxsw_sp1_acl_tcam_ops;
 	mlxsw_sp->nve_ops_arr = mlxsw_sp1_nve_ops_arr;
 	mlxsw_sp->mac_mask = mlxsw_sp1_mac_mask;
+	mlxsw_sp->rif_ops_arr = mlxsw_sp1_rif_ops_arr;
 
 	return mlxsw_sp_init(mlxsw_core, mlxsw_bus_info);
 }
@@ -4110,6 +4111,7 @@ static int mlxsw_sp2_init(struct mlxsw_core *mlxsw_core,
 	mlxsw_sp->acl_tcam_ops = &mlxsw_sp2_acl_tcam_ops;
 	mlxsw_sp->nve_ops_arr = mlxsw_sp2_nve_ops_arr;
 	mlxsw_sp->mac_mask = mlxsw_sp2_mac_mask;
+	mlxsw_sp->rif_ops_arr = mlxsw_sp2_rif_ops_arr;
 
 	return mlxsw_sp_init(mlxsw_core, mlxsw_bus_info);
 }

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -75,6 +75,11 @@ enum mlxsw_sp_rif_type {
 	MLXSW_SP_RIF_TYPE_MAX,
 };
 
+struct mlxsw_sp_rif_ops;
+
+extern const struct mlxsw_sp_rif_ops *mlxsw_sp1_rif_ops_arr[];
+extern const struct mlxsw_sp_rif_ops *mlxsw_sp2_rif_ops_arr[];
+
 enum mlxsw_sp_fid_type {
 	MLXSW_SP_FID_TYPE_8021Q,
 	MLXSW_SP_FID_TYPE_8021D,
@@ -161,6 +166,7 @@ struct mlxsw_sp {
 	const struct mlxsw_sp_mr_tcam_ops *mr_tcam_ops;
 	const struct mlxsw_sp_acl_tcam_ops *acl_tcam_ops;
 	const struct mlxsw_sp_nve_ops **nve_ops_arr;
+	const struct mlxsw_sp_rif_ops **rif_ops_arr;
 };
 
 static inline struct mlxsw_sp_upper *

drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c

@@ -220,7 +220,7 @@ mlxsw_sp_dpipe_table_erif_entries_dump(void *priv, bool counters_enabled,
 	for (; i < rif_count; i++) {
 		struct mlxsw_sp_rif *rif = mlxsw_sp_rif_by_index(mlxsw_sp, i);
 
-		if (!rif)
+		if (!rif || !mlxsw_sp_rif_dev(rif))
 			continue;
 		err = mlxsw_sp_erif_entry_get(mlxsw_sp, &entry, rif,
 					      counters_enabled);

drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c

@@ -145,6 +145,7 @@ mlxsw_sp_ipip_fib_entry_op_gre4_rtdp(struct mlxsw_sp *mlxsw_sp,
 				     struct mlxsw_sp_ipip_entry *ipip_entry)
 {
 	u16 rif_index = mlxsw_sp_ipip_lb_rif_index(ipip_entry->ol_lb);
+	u16 ul_rif_id = mlxsw_sp_ipip_lb_ul_rif_id(ipip_entry->ol_lb);
 	char rtdp_pl[MLXSW_REG_RTDP_LEN];
 	struct ip_tunnel_parm parms;
 	unsigned int type_check;
@@ -157,6 +158,7 @@ mlxsw_sp_ipip_fib_entry_op_gre4_rtdp(struct mlxsw_sp *mlxsw_sp,
 	ikey = mlxsw_sp_ipip_parms4_ikey(parms);
 
 	mlxsw_reg_rtdp_pack(rtdp_pl, MLXSW_REG_RTDP_TYPE_IPIP, tunnel_index);
+	mlxsw_reg_rtdp_egress_router_interface_set(rtdp_pl, ul_rif_id);
 
 	type_check = has_ikey ?
 		MLXSW_REG_RTDP_IPIP_TYPE_CHECK_ALLOW_GRE_KEY :