From b48be0498952550c01fb5de0769c8f1be1ac612d Mon Sep 17 00:00:00 2001 From: Alaa Hleihel Date: Tue, 19 May 2020 07:48:32 -0400 Subject: [PATCH 211/312] [netdrv] net/mlx5: TC: Offload flow table rules Message-id: <20200519074934.6303-2-ahleihel@redhat.com> Patchwork-id: 310508 Patchwork-instance: patchwork O-Subject: [RHEL8.3 BZ 1663246 01/63] net/mlx5: TC: Offload flow table rules Bugzilla: 1663246 RH-Acked-by: Marcelo Leitner RH-Acked-by: Jarod Wilson RH-Acked-by: John Linville RH-Acked-by: Ivan Vecera RH-Acked-by: Tony Camuso RH-Acked-by: Kamal Heib Bugzilla: http://bugzilla.redhat.com/1663246 Upstream: v5.5-rc1 Conflicts: - drivers/net/ethernet/mellanox/mlx5/core/en_tc.c Small context diff due to already backported commit: 554fe75c1b3f ("net/mlx5e: Avoid duplicating rule destinations") ---> Different list of local variables in function parse_tc_fdb_actions. commit 84179981317fb4fb3e9df5acd42ea33cf6037793 Author: Paul Blakey Date: Tue Nov 12 00:34:30 2019 +0100 net/mlx5: TC: Offload flow table rules Since both tc rules and flow table rules are of the same format, we can re-use tc parsing for that, and move the flow table rules to their steering domain - In this case, the next chain after max tc chain. Signed-off-by: Paul Blakey Reviewed-by: Mark Bloch Acked-by: Pablo Neira Ayuso Signed-off-by: Saeed Mahameed Signed-off-by: Alaa Hleihel Signed-off-by: Frantisek Hrbata --- drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 45 ++++++++++++++++++++++-- drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 28 ++++++++++++++- drivers/net/ethernet/mellanox/mlx5/core/en_tc.h | 3 +- 3 files changed, 71 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c index 7ba784575a23..d03d80e162df 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c @@ -1220,21 +1220,60 @@ static int mlx5e_rep_setup_tc_cb(enum tc_setup_type type, void *type_data, } } -static LIST_HEAD(mlx5e_rep_block_cb_list); +static int mlx5e_rep_setup_ft_cb(enum tc_setup_type type, void *type_data, + void *cb_priv) +{ + struct flow_cls_offload *f = type_data; + struct flow_cls_offload cls_flower; + struct mlx5e_priv *priv = cb_priv; + struct mlx5_eswitch *esw; + unsigned long flags; + int err; + + flags = MLX5_TC_FLAG(INGRESS) | + MLX5_TC_FLAG(ESW_OFFLOAD) | + MLX5_TC_FLAG(FT_OFFLOAD); + esw = priv->mdev->priv.eswitch; + switch (type) { + case TC_SETUP_CLSFLOWER: + if (!mlx5_eswitch_prios_supported(esw) || f->common.chain_index) + return -EOPNOTSUPP; + + /* Re-use tc offload path by moving the ft flow to the + * reserved ft chain. + */ + memcpy(&cls_flower, f, sizeof(*f)); + cls_flower.common.chain_index = FDB_FT_CHAIN; + err = mlx5e_rep_setup_tc_cls_flower(priv, &cls_flower, flags); + memcpy(&f->stats, &cls_flower.stats, sizeof(f->stats)); + return err; + default: + return -EOPNOTSUPP; + } +} + +static LIST_HEAD(mlx5e_rep_block_tc_cb_list); +static LIST_HEAD(mlx5e_rep_block_ft_cb_list); static int mlx5e_rep_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data) { struct mlx5e_priv *priv = netdev_priv(dev); struct flow_block_offload *f = type_data; + f->unlocked_driver_cb = true; + switch (type) { case TC_SETUP_BLOCK: - f->unlocked_driver_cb = true; return flow_block_cb_setup_simple(type_data, - &mlx5e_rep_block_cb_list, + &mlx5e_rep_block_tc_cb_list, mlx5e_rep_setup_tc_cb, priv, priv, true); + case TC_SETUP_FT: + return flow_block_cb_setup_simple(type_data, + &mlx5e_rep_block_ft_cb_list, + mlx5e_rep_setup_ft_cb, + priv, priv, true); default: return -EOPNOTSUPP; } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c index 3461aec49d9e..3df69f8ed58a 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -74,6 +74,7 @@ enum { MLX5E_TC_FLOW_FLAG_INGRESS = MLX5E_TC_FLAG_INGRESS_BIT, MLX5E_TC_FLOW_FLAG_EGRESS = MLX5E_TC_FLAG_EGRESS_BIT, MLX5E_TC_FLOW_FLAG_ESWITCH = MLX5E_TC_FLAG_ESW_OFFLOAD_BIT, + MLX5E_TC_FLOW_FLAG_FT = MLX5E_TC_FLAG_FT_OFFLOAD_BIT, MLX5E_TC_FLOW_FLAG_NIC = MLX5E_TC_FLAG_NIC_OFFLOAD_BIT, MLX5E_TC_FLOW_FLAG_OFFLOADED = MLX5E_TC_FLOW_BASE, MLX5E_TC_FLOW_FLAG_HAIRPIN = MLX5E_TC_FLOW_BASE + 1, @@ -276,6 +277,11 @@ static bool mlx5e_is_eswitch_flow(struct mlx5e_tc_flow *flow) return flow_flag_test(flow, ESWITCH); } +static bool mlx5e_is_ft_flow(struct mlx5e_tc_flow *flow) +{ + return flow_flag_test(flow, FT); +} + static bool mlx5e_is_offloaded_flow(struct mlx5e_tc_flow *flow) { return flow_flag_test(flow, OFFLOADED); @@ -1171,7 +1177,12 @@ mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv, return -EOPNOTSUPP; } - if (attr->chain > max_chain) { + /* We check chain range only for tc flows. + * For ft flows, we checked attr->chain was originally 0 and set it to + * FDB_FT_CHAIN which is outside tc range. + * See mlx5e_rep_setup_ft_cb(). + */ + if (!mlx5e_is_ft_flow(flow) && attr->chain > max_chain) { NL_SET_ERR_MSG(extack, "Requested chain is out of supported range"); return -EOPNOTSUPP; } @@ -3315,6 +3326,7 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct mlx5e_rep_priv *rpriv = priv->ppriv; const struct ip_tunnel_info *info = NULL; int ifindexes[MLX5_MAX_FLOW_FWD_VPORTS]; + bool ft_flow = mlx5e_is_ft_flow(flow); const struct flow_action_entry *act; int err, i, if_count = 0; bool encap = false; @@ -3362,6 +3374,14 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, return -EINVAL; } + if (ft_flow && out_dev == priv->netdev) { + /* Ignore forward to self rules generated + * by adding both mlx5 devs to the flow table + * block on a normal nft offload setup. + */ + return -EOPNOTSUPP; + } + if (attr->out_count >= MLX5_MAX_FLOW_FWD_VPORTS) { NL_SET_ERR_MSG_MOD(extack, "can't support more output ports, can't offload forwarding"); @@ -3518,6 +3538,10 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, u32 dest_chain = act->chain_index; u32 max_chain = mlx5_eswitch_get_chain_range(esw); + if (ft_flow) { + NL_SET_ERR_MSG_MOD(extack, "Goto action is not supported"); + return -EOPNOTSUPP; + } if (dest_chain <= attr->chain) { NL_SET_ERR_MSG(extack, "Goto earlier chain isn't supported"); return -EOPNOTSUPP; @@ -3608,6 +3632,8 @@ static void get_flags(int flags, unsigned long *flow_flags) __flow_flags |= BIT(MLX5E_TC_FLOW_FLAG_ESWITCH); if (flags & MLX5_TC_FLAG(NIC_OFFLOAD)) __flow_flags |= BIT(MLX5E_TC_FLOW_FLAG_NIC); + if (flags & MLX5_TC_FLAG(FT_OFFLOAD)) + __flow_flags |= BIT(MLX5E_TC_FLOW_FLAG_FT); *flow_flags = __flow_flags; } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h index 924c6ef86a14..262cdb7b69b1 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h @@ -44,7 +44,8 @@ enum { MLX5E_TC_FLAG_EGRESS_BIT, MLX5E_TC_FLAG_NIC_OFFLOAD_BIT, MLX5E_TC_FLAG_ESW_OFFLOAD_BIT, - MLX5E_TC_FLAG_LAST_EXPORTED_BIT = MLX5E_TC_FLAG_ESW_OFFLOAD_BIT, + MLX5E_TC_FLAG_FT_OFFLOAD_BIT, + MLX5E_TC_FLAG_LAST_EXPORTED_BIT = MLX5E_TC_FLAG_FT_OFFLOAD_BIT, }; #define MLX5_TC_FLAG(flag) BIT(MLX5E_TC_FLAG_##flag##_BIT) -- 2.13.6