mlxsw: spectrum_router: Add support for double entry RIFs

In Spectrum-1, loopback router interfaces (RIFs) used for IP-in-IP
encapsulation with an IPv6 underlay require two RIF entries and the RIF
index must be even.

Prepare for this change by extending the RIF parameters structure with a
'double_entry' field that indicates if the RIF being created requires
two RIF entries or not. Only set it for RIFs representing ip6gre tunnels
in Spectrum-1.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
index a2ee695..7ed4b64 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
@@ -433,6 +433,7 @@ static const struct mlxsw_sp_ipip_ops mlxsw_sp1_ipip_gre6_ops = {
        .dev_type = ARPHRD_IP6GRE,
        .ul_proto = MLXSW_SP_L3_PROTO_IPV6,
        .inc_parsing_depth = true,
+       .double_rif_entry = true,
        .parms_init = mlxsw_sp1_ipip_netdev_parms_init_gre6,
        .nexthop_update = mlxsw_sp1_ipip_nexthop_update_gre6,
        .decap_config = mlxsw_sp1_ipip_decap_config_gre6,

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
index 8cc259d..a35f009 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h
@@ -49,6 +49,7 @@ struct mlxsw_sp_ipip_ops {
        int dev_type;
        enum mlxsw_sp_l3proto ul_proto; /* Underlay. */
        bool inc_parsing_depth;
+       bool double_rif_entry;
 
        struct mlxsw_sp_ipip_parms
        (*parms_init)(const struct net_device *ol_dev);

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index f3ace20..c22c3ac 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -79,6 +79,7 @@ struct mlxsw_sp_rif_params {
        };
        u16 vid;
        bool lag;
+       bool double_entry;
 };
 
 struct mlxsw_sp_rif_subport {
@@ -1070,6 +1071,7 @@ mlxsw_sp_ipip_ol_ipip_lb_create(struct mlxsw_sp *mlxsw_sp,
        lb_params = (struct mlxsw_sp_rif_params_ipip_lb) {
                .common.dev = ol_dev,
                .common.lag = false,
+               .common.double_entry = ipip_ops->double_rif_entry,
                .lb_config = ipip_ops->ol_loopback_config(mlxsw_sp, ol_dev),
        };
 
@@ -8091,13 +8093,13 @@ mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp,
                    const struct mlxsw_sp_rif_params *params,
                    struct netlink_ext_ack *extack)
 {
+       u8 rif_entries = params->double_entry ? 2 : 1;
        u32 tb_id = l3mdev_fib_table(params->dev);
        const struct mlxsw_sp_rif_ops *ops;
        struct mlxsw_sp_fid *fid = NULL;
        enum mlxsw_sp_rif_type type;
        struct mlxsw_sp_rif *rif;
        struct mlxsw_sp_vr *vr;
-       u8 rif_entries = 1;
        u16 rif_index;
        int i, err;