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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/pedit.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/pedit.c')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/pedit.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/pedit.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/pedit.c new file mode 100644 index 000000000..47597c524 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/pedit.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved. + +#include <linux/if_vlan.h> +#include "act.h" +#include "pedit.h" +#include "en/tc_priv.h" +#include "en/mod_hdr.h" + +static int pedit_header_offsets[] = { + [FLOW_ACT_MANGLE_HDR_TYPE_ETH] = offsetof(struct pedit_headers, eth), + [FLOW_ACT_MANGLE_HDR_TYPE_IP4] = offsetof(struct pedit_headers, ip4), + [FLOW_ACT_MANGLE_HDR_TYPE_IP6] = offsetof(struct pedit_headers, ip6), + [FLOW_ACT_MANGLE_HDR_TYPE_TCP] = offsetof(struct pedit_headers, tcp), + [FLOW_ACT_MANGLE_HDR_TYPE_UDP] = offsetof(struct pedit_headers, udp), +}; + +#define pedit_header(_ph, _htype) ((void *)(_ph) + pedit_header_offsets[_htype]) + +static int +set_pedit_val(u8 hdr_type, u32 mask, u32 val, u32 offset, + struct pedit_headers_action *hdrs, + struct netlink_ext_ack *extack) +{ + u32 *curr_pmask, *curr_pval; + + curr_pmask = (u32 *)(pedit_header(&hdrs->masks, hdr_type) + offset); + curr_pval = (u32 *)(pedit_header(&hdrs->vals, hdr_type) + offset); + + if (*curr_pmask & mask) { /* disallow acting twice on the same location */ + NL_SET_ERR_MSG_MOD(extack, + "curr_pmask and new mask same. Acting twice on same location"); + goto out_err; + } + + *curr_pmask |= mask; + *curr_pval |= (val & mask); + + return 0; + +out_err: + return -EOPNOTSUPP; +} + +int +mlx5e_tc_act_pedit_parse_action(struct mlx5e_priv *priv, + const struct flow_action_entry *act, int namespace, + struct pedit_headers_action *hdrs, + struct netlink_ext_ack *extack) +{ + u8 cmd = (act->id == FLOW_ACTION_MANGLE) ? 0 : 1; + u8 htype = act->mangle.htype; + int err = -EOPNOTSUPP; + u32 mask, val, offset; + + if (htype == FLOW_ACT_MANGLE_UNSPEC) { + NL_SET_ERR_MSG_MOD(extack, "legacy pedit isn't offloaded"); + goto out_err; + } + + if (!mlx5e_mod_hdr_max_actions(priv->mdev, namespace)) { + NL_SET_ERR_MSG_MOD(extack, "The pedit offload action is not supported"); + goto out_err; + } + + mask = act->mangle.mask; + val = act->mangle.val; + offset = act->mangle.offset; + + err = set_pedit_val(htype, ~mask, val, offset, &hdrs[cmd], extack); + if (err) + goto out_err; + + hdrs[cmd].pedits++; + + return 0; +out_err: + return err; +} + +static bool +tc_act_can_offload_pedit(struct mlx5e_tc_act_parse_state *parse_state, + const struct flow_action_entry *act, + int act_index, + struct mlx5_flow_attr *attr) +{ + return true; +} + +static int +tc_act_parse_pedit(struct mlx5e_tc_act_parse_state *parse_state, + const struct flow_action_entry *act, + struct mlx5e_priv *priv, + struct mlx5_flow_attr *attr) +{ + struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr; + struct mlx5e_tc_flow *flow = parse_state->flow; + enum mlx5_flow_namespace_type ns_type; + int err; + + ns_type = mlx5e_get_flow_namespace(flow); + + err = mlx5e_tc_act_pedit_parse_action(flow->priv, act, ns_type, attr->parse_attr->hdrs, + parse_state->extack); + if (err) + return err; + + attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR; + + if (ns_type == MLX5_FLOW_NAMESPACE_FDB) + esw_attr->split_count = esw_attr->out_count; + + return 0; +} + +struct mlx5e_tc_act mlx5e_tc_act_pedit = { + .can_offload = tc_act_can_offload_pedit, + .parse_action = tc_act_parse_pedit, +}; |