diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c new file mode 100644 index 000000000000..4e55d7225a26 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c @@ -0,0 +1,322 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* Copyright (c) 2020 Mellanox Technologies Inc. All rights reserved. */ + +#include "mlx5_core.h" +#include "eswitch.h" +#include "helper.h" +#include "ofld.h" + +static bool +esw_acl_ingress_prio_tag_enabled(const struct mlx5_eswitch *esw, + const struct mlx5_vport *vport) +{ + return (MLX5_CAP_GEN(esw->dev, prio_tag_required) && + mlx5_eswitch_is_vf_vport(esw, vport->vport)); +} + +static int esw_acl_ingress_prio_tag_create(struct mlx5_eswitch *esw, + struct mlx5_vport *vport) +{ + struct mlx5_flow_act flow_act = {}; + struct mlx5_flow_spec *spec; + int err = 0; + + /* For prio tag mode, there is only 1 FTEs: + * 1) Untagged packets - push prio tag VLAN and modify metadata if + * required, allow + * Unmatched traffic is allowed by default + */ + spec = kvzalloc(sizeof(*spec), GFP_KERNEL); + if (!spec) + return -ENOMEM; + + /* Untagged packets - push prio tag VLAN, allow */ + MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.cvlan_tag); + MLX5_SET(fte_match_param, spec->match_value, outer_headers.cvlan_tag, 0); + spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS; + flow_act.action = MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH | + MLX5_FLOW_CONTEXT_ACTION_ALLOW; + flow_act.vlan[0].ethtype = ETH_P_8021Q; + flow_act.vlan[0].vid = 0; + flow_act.vlan[0].prio = 0; + + if (vport->ingress.offloads.modify_metadata_rule) { + flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR; + flow_act.modify_hdr = vport->ingress.offloads.modify_metadata; + } + + vport->ingress.allow_rule = mlx5_add_flow_rules(vport->ingress.acl, spec, + &flow_act, NULL, 0); + if (IS_ERR(vport->ingress.allow_rule)) { + err = PTR_ERR(vport->ingress.allow_rule); + esw_warn(esw->dev, + "vport[%d] configure ingress untagged allow rule, err(%d)\n", + vport->vport, err); + vport->ingress.allow_rule = NULL; + } + + kvfree(spec); + return err; +} + +static int esw_acl_ingress_mod_metadata_create(struct mlx5_eswitch *esw, + struct mlx5_vport *vport) +{ + u8 action[MLX5_UN_SZ_BYTES(set_add_copy_action_in_auto)] = {}; + struct mlx5_flow_act flow_act = {}; + int err = 0; + u32 key; + + key = mlx5_eswitch_get_vport_metadata_for_match(esw, vport->vport); + key >>= ESW_SOURCE_PORT_METADATA_OFFSET; + + MLX5_SET(set_action_in, action, action_type, MLX5_ACTION_TYPE_SET); + MLX5_SET(set_action_in, action, field, + MLX5_ACTION_IN_FIELD_METADATA_REG_C_0); + MLX5_SET(set_action_in, action, data, key); + MLX5_SET(set_action_in, action, offset, + ESW_SOURCE_PORT_METADATA_OFFSET); + MLX5_SET(set_action_in, action, length, + ESW_SOURCE_PORT_METADATA_BITS); + + vport->ingress.offloads.modify_metadata = + mlx5_modify_header_alloc(esw->dev, MLX5_FLOW_NAMESPACE_ESW_INGRESS, + 1, action); + if (IS_ERR(vport->ingress.offloads.modify_metadata)) { + err = PTR_ERR(vport->ingress.offloads.modify_metadata); + esw_warn(esw->dev, + "failed to alloc modify header for vport %d ingress acl (%d)\n", + vport->vport, err); + return err; + } + + flow_act.action = MLX5_FLOW_CONTEXT_ACTION_MOD_HDR | MLX5_FLOW_CONTEXT_ACTION_ALLOW; + flow_act.modify_hdr = vport->ingress.offloads.modify_metadata; + vport->ingress.offloads.modify_metadata_rule = + mlx5_add_flow_rules(vport->ingress.acl, + NULL, &flow_act, NULL, 0); + if (IS_ERR(vport->ingress.offloads.modify_metadata_rule)) { + err = PTR_ERR(vport->ingress.offloads.modify_metadata_rule); + esw_warn(esw->dev, + "failed to add setting metadata rule for vport %d ingress acl, err(%d)\n", + vport->vport, err); + mlx5_modify_header_dealloc(esw->dev, vport->ingress.offloads.modify_metadata); + vport->ingress.offloads.modify_metadata_rule = NULL; + } + return err; +} + +static void esw_acl_ingress_mod_metadata_destroy(struct mlx5_eswitch *esw, + struct mlx5_vport *vport) +{ + if (!vport->ingress.offloads.modify_metadata_rule) + return; + + mlx5_del_flow_rules(vport->ingress.offloads.modify_metadata_rule); + mlx5_modify_header_dealloc(esw->dev, vport->ingress.offloads.modify_metadata); + vport->ingress.offloads.modify_metadata_rule = NULL; +} + +static int esw_acl_ingress_ofld_rules_create(struct mlx5_eswitch *esw, + struct mlx5_vport *vport) +{ + int err; + + if (mlx5_eswitch_vport_match_metadata_enabled(esw)) { + err = esw_acl_ingress_mod_metadata_create(esw, vport); + if (err) { + esw_warn(esw->dev, + "vport(%d) create ingress modify metadata, err(%d)\n", + vport->vport, err); + return err; + } + } + + if (esw_acl_ingress_prio_tag_enabled(esw, vport)) { + err = esw_acl_ingress_prio_tag_create(esw, vport); + if (err) { + esw_warn(esw->dev, + "vport(%d) create ingress prio tag rule, err(%d)\n", + vport->vport, err); + goto prio_tag_err; + } + } + + return 0; + +prio_tag_err: + esw_acl_ingress_mod_metadata_destroy(esw, vport); + return err; +} + +static void esw_acl_ingress_ofld_rules_destroy(struct mlx5_eswitch *esw, + struct mlx5_vport *vport) +{ + esw_acl_ingress_allow_rule_destroy(vport); + esw_acl_ingress_mod_metadata_destroy(esw, vport); +} + +static int esw_acl_ingress_ofld_groups_create(struct mlx5_eswitch *esw, + struct mlx5_vport *vport) +{ + int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in); + struct mlx5_flow_group *g; + void *match_criteria; + u32 *flow_group_in; + u32 flow_index = 0; + int ret = 0; + + flow_group_in = kvzalloc(inlen, GFP_KERNEL); + if (!flow_group_in) + return -ENOMEM; + + if (esw_acl_ingress_prio_tag_enabled(esw, vport)) { + /* This group is to hold FTE to match untagged packets when prio_tag + * is enabled. + */ + match_criteria = MLX5_ADDR_OF(create_flow_group_in, + flow_group_in, match_criteria); + MLX5_SET(create_flow_group_in, flow_group_in, + match_criteria_enable, MLX5_MATCH_OUTER_HEADERS); + MLX5_SET_TO_ONES(fte_match_param, match_criteria, outer_headers.cvlan_tag); + MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, flow_index); + MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, flow_index); + + g = mlx5_create_flow_group(vport->ingress.acl, flow_group_in); + if (IS_ERR(g)) { + ret = PTR_ERR(g); + esw_warn(esw->dev, "vport[%d] ingress create untagged flow group, err(%d)\n", + vport->vport, ret); + goto prio_tag_err; + } + vport->ingress.offloads.metadata_prio_tag_grp = g; + flow_index++; + } + + if (mlx5_eswitch_vport_match_metadata_enabled(esw)) { + /* This group holds an FTE with no match to add metadata for + * tagged packets if prio-tag is enabled, or for all untagged + * traffic in case prio-tag is disabled. + */ + memset(flow_group_in, 0, inlen); + MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, flow_index); + MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, flow_index); + + g = mlx5_create_flow_group(vport->ingress.acl, flow_group_in); + if (IS_ERR(g)) { + ret = PTR_ERR(g); + esw_warn(esw->dev, "vport[%d] ingress create drop flow group, err(%d)\n", + vport->vport, ret); + goto metadata_err; + } + vport->ingress.offloads.metadata_allmatch_grp = g; + } + + kvfree(flow_group_in); + return 0; + +metadata_err: + if (!IS_ERR_OR_NULL(vport->ingress.offloads.metadata_prio_tag_grp)) { + mlx5_destroy_flow_group(vport->ingress.offloads.metadata_prio_tag_grp); + vport->ingress.offloads.metadata_prio_tag_grp = NULL; + } +prio_tag_err: + kvfree(flow_group_in); + return ret; +} + +static void esw_acl_ingress_ofld_groups_destroy(struct mlx5_vport *vport) +{ + if (vport->ingress.offloads.metadata_allmatch_grp) { + mlx5_destroy_flow_group(vport->ingress.offloads.metadata_allmatch_grp); + vport->ingress.offloads.metadata_allmatch_grp = NULL; + } + + if (vport->ingress.offloads.metadata_prio_tag_grp) { + mlx5_destroy_flow_group(vport->ingress.offloads.metadata_prio_tag_grp); + vport->ingress.offloads.metadata_prio_tag_grp = NULL; + } +} + +int esw_acl_ingress_ofld_setup(struct mlx5_eswitch *esw, + struct mlx5_vport *vport) +{ + int num_ftes = 0; + int err; + + if (!mlx5_eswitch_vport_match_metadata_enabled(esw) && + !esw_acl_ingress_prio_tag_enabled(esw, vport)) + return 0; + + esw_acl_ingress_allow_rule_destroy(vport); + + if (mlx5_eswitch_vport_match_metadata_enabled(esw)) + num_ftes++; + if (esw_acl_ingress_prio_tag_enabled(esw, vport)) + num_ftes++; + + vport->ingress.acl = esw_acl_table_create(esw, vport->vport, + MLX5_FLOW_NAMESPACE_ESW_INGRESS, + num_ftes); + if (IS_ERR_OR_NULL(vport->ingress.acl)) { + err = PTR_ERR(vport->ingress.acl); + vport->ingress.acl = NULL; + return err; + } + + err = esw_acl_ingress_ofld_groups_create(esw, vport); + if (err) + goto group_err; + + esw_debug(esw->dev, + "vport[%d] configure ingress rules\n", vport->vport); + + err = esw_acl_ingress_ofld_rules_create(esw, vport); + if (err) + goto rules_err; + + return 0; + +rules_err: + esw_acl_ingress_ofld_groups_destroy(vport); +group_err: + esw_acl_ingress_table_destroy(vport); + return err; +} + +void esw_acl_ingress_ofld_cleanup(struct mlx5_eswitch *esw, + struct mlx5_vport *vport) +{ + esw_acl_ingress_ofld_rules_destroy(esw, vport); + esw_acl_ingress_ofld_groups_destroy(vport); + esw_acl_ingress_table_destroy(vport); +} + +/* Caller must hold rtnl_lock */ +int mlx5_esw_acl_ingress_vport_bond_update(struct mlx5_eswitch *esw, u16 vport_num, + u32 metadata) +{ + struct mlx5_vport *vport = mlx5_eswitch_get_vport(esw, vport_num); + int err; + + if (WARN_ON_ONCE(IS_ERR(vport))) { + esw_warn(esw->dev, "vport(%d) invalid!\n", vport_num); + err = PTR_ERR(vport); + goto out; + } + + esw_acl_ingress_ofld_rules_destroy(esw, vport); + + vport->metadata = metadata ? metadata : vport->default_metadata; + + /* Recreate ingress acl rules with vport->metadata */ + err = esw_acl_ingress_ofld_rules_create(esw, vport); + if (err) + goto out; + + return 0; + +out: + vport->metadata = vport->default_metadata; + return err; +} |