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

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Spectrum-2 GRE tunnel implementation requires a specific underlay RIF that
points to the virtual router used for forwarding the encapsulated packet.

Add Spectrum-2 specific loopback router interface creation methods which
may create or reuse the dedicated underlay RIF.

Signed-off-by: Nir Dotan <nird@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nir Dotan 2019-01-20 06:50:51 +00:00 committed by David S. Miller
parent 311596f554
commit a5040a9059
1 changed files with 130 additions and 0 deletions
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130
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
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@ -441,6 +441,8 @@ struct mlxsw_sp_vr {
struct mlxsw_sp_fib *fib4;
struct mlxsw_sp_fib *fib6;
struct mlxsw_sp_mr_table *mr_table[MLXSW_SP_L3_PROTO_MAX];
struct mlxsw_sp_rif *ul_rif;
refcount_t ul_rif_refcnt;
};
static const struct rhashtable_params mlxsw_sp_fib_ht_params;
@ -7493,14 +7495,142 @@ const struct mlxsw_sp_rif_ops *mlxsw_sp1_rif_ops_arr[] = {
[MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp1_rif_ipip_lb_ops,
};
static int
mlxsw_sp_rif_ipip_lb_ul_rif_op(struct mlxsw_sp_rif *ul_rif, bool enable)
{
struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp;
char ritr_pl[MLXSW_REG_RITR_LEN];
mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF,
ul_rif->rif_index, ul_rif->vr_id, IP_MAX_MTU);
mlxsw_reg_ritr_loopback_protocol_set(ritr_pl,
MLXSW_REG_RITR_LOOPBACK_GENERIC);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static struct mlxsw_sp_rif *
mlxsw_sp_ul_rif_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif *ul_rif;
u16 rif_index;
int err;
err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces");
return ERR_PTR(err);
}
ul_rif = mlxsw_sp_rif_alloc(sizeof(*ul_rif), rif_index, vr->id, NULL);
if (!ul_rif)
return ERR_PTR(-ENOMEM);
mlxsw_sp->router->rifs[rif_index] = ul_rif;
ul_rif->mlxsw_sp = mlxsw_sp;
err = mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, true);
if (err)
goto ul_rif_op_err;
return ul_rif;
ul_rif_op_err:
mlxsw_sp->router->rifs[rif_index] = NULL;
kfree(ul_rif);
return ERR_PTR(err);
}
static void mlxsw_sp_ul_rif_destroy(struct mlxsw_sp_rif *ul_rif)
{
struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp;
mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, false);
mlxsw_sp->router->rifs[ul_rif->rif_index] = NULL;
kfree(ul_rif);
}
static struct mlxsw_sp_rif *
mlxsw_sp_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_vr *vr;
int err;
vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, extack);
if (IS_ERR(vr))
return ERR_CAST(vr);
if (refcount_inc_not_zero(&vr->ul_rif_refcnt))
return vr->ul_rif;
vr->ul_rif = mlxsw_sp_ul_rif_create(mlxsw_sp, vr, extack);
if (IS_ERR(vr->ul_rif)) {
err = PTR_ERR(vr->ul_rif);
goto err_ul_rif_create;
}
vr->rif_count++;
refcount_set(&vr->ul_rif_refcnt, 1);
return vr->ul_rif;
err_ul_rif_create:
mlxsw_sp_vr_put(mlxsw_sp, vr);
return ERR_PTR(err);
}
static void mlxsw_sp_ul_rif_put(struct mlxsw_sp_rif *ul_rif)
{
struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp;
struct mlxsw_sp_vr *vr;
vr = &mlxsw_sp->router->vrs[ul_rif->vr_id];
if (!refcount_dec_and_test(&vr->ul_rif_refcnt))
return;
vr->rif_count--;
mlxsw_sp_ul_rif_destroy(ul_rif);
mlxsw_sp_vr_put(mlxsw_sp, vr);
}
static int
mlxsw_sp2_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif);
u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif *ul_rif;
int err;
ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL);
if (IS_ERR(ul_rif))
return PTR_ERR(ul_rif);
err = mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, ul_rif->rif_index, true);
if (err)
goto err_loopback_op;
lb_rif->ul_vr_id = 0;
lb_rif->ul_rif_id = ul_rif->rif_index;
return 0;
err_loopback_op:
mlxsw_sp_ul_rif_put(ul_rif);
return err;
}
static void mlxsw_sp2_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif *ul_rif;
ul_rif = mlxsw_sp_rif_by_index(mlxsw_sp, lb_rif->ul_rif_id);
mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, lb_rif->ul_rif_id, false);
mlxsw_sp_ul_rif_put(ul_rif);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_ipip_lb_ops = {