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net/mlx5e: Introduce tc offload support
Extend ndo_setup_tc() to support ingress tc offloading. Will be used by later patches to offload tc flower filter. Feature is off by default and could be enabled by issuing: # ethtool -K eth0 hw-tc-offload on Offloads flow table is dynamically created when first filter is added. Rules are saved in a hash table that is maintained by the consumer (for example - the flower offload in the next patch). When last filter is removed and no filters exist in the hash table, the offload flow table is destroyed. Signed-off-by: Amir Vadai <amir@vadai.me> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Amir Vadai
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David S. Miller
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Mar 10, 2016
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* | ||
| * Copyright (c) 2016, Mellanox Technologies. All rights reserved. | ||
| * | ||
| * This software is available to you under a choice of one of two | ||
| * licenses. You may choose to be licensed under the terms of the GNU | ||
| * General Public License (GPL) Version 2, available from the file | ||
| * COPYING in the main directory of this source tree, or the | ||
| * OpenIB.org BSD license below: | ||
| * | ||
| * Redistribution and use in source and binary forms, with or | ||
| * without modification, are permitted provided that the following | ||
| * conditions are met: | ||
| * | ||
| * - Redistributions of source code must retain the above | ||
| * copyright notice, this list of conditions and the following | ||
| * disclaimer. | ||
| * | ||
| * - Redistributions in binary form must reproduce the above | ||
| * copyright notice, this list of conditions and the following | ||
| * disclaimer in the documentation and/or other materials | ||
| * provided with the distribution. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | ||
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | ||
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| #include <linux/mlx5/fs.h> | ||
| #include <linux/mlx5/device.h> | ||
| #include <linux/rhashtable.h> | ||
| #include "en.h" | ||
| #include "en_tc.h" | ||
|
|
||
| struct mlx5e_tc_flow { | ||
| struct rhash_head node; | ||
| u64 cookie; | ||
| struct mlx5_flow_rule *rule; | ||
| }; | ||
|
|
||
| #define MLX5E_TC_FLOW_TABLE_NUM_ENTRIES 1024 | ||
| #define MLX5E_TC_FLOW_TABLE_NUM_GROUPS 4 | ||
|
|
||
| static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv, | ||
| u32 *match_c, u32 *match_v, | ||
| u32 action, u32 flow_tag) | ||
| { | ||
| struct mlx5_flow_destination dest = { | ||
| .type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE, | ||
| {.ft = priv->fts.vlan.t}, | ||
| }; | ||
| struct mlx5_flow_rule *rule; | ||
| bool table_created = false; | ||
|
|
||
| if (IS_ERR_OR_NULL(priv->fts.tc.t)) { | ||
| priv->fts.tc.t = | ||
| mlx5_create_auto_grouped_flow_table(priv->fts.ns, 0, | ||
| MLX5E_TC_FLOW_TABLE_NUM_ENTRIES, | ||
| MLX5E_TC_FLOW_TABLE_NUM_GROUPS); | ||
| if (IS_ERR(priv->fts.tc.t)) { | ||
| netdev_err(priv->netdev, | ||
| "Failed to create tc offload table\n"); | ||
| return ERR_CAST(priv->fts.tc.t); | ||
| } | ||
|
|
||
| table_created = true; | ||
| } | ||
|
|
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| rule = mlx5_add_flow_rule(priv->fts.tc.t, MLX5_MATCH_OUTER_HEADERS, | ||
| match_c, match_v, | ||
| action, flow_tag, | ||
| action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST ? &dest : NULL); | ||
|
|
||
| if (IS_ERR(rule) && table_created) { | ||
| mlx5_destroy_flow_table(priv->fts.tc.t); | ||
| priv->fts.tc.t = NULL; | ||
| } | ||
|
|
||
| return rule; | ||
| } | ||
|
|
||
| static void mlx5e_tc_del_flow(struct mlx5e_priv *priv, | ||
| struct mlx5_flow_rule *rule) | ||
| { | ||
| mlx5_del_flow_rule(rule); | ||
|
|
||
| if (!mlx5e_tc_num_filters(priv)) { | ||
| mlx5_destroy_flow_table(priv->fts.tc.t); | ||
| priv->fts.tc.t = NULL; | ||
| } | ||
| } | ||
|
|
||
| static const struct rhashtable_params mlx5e_tc_flow_ht_params = { | ||
| .head_offset = offsetof(struct mlx5e_tc_flow, node), | ||
| .key_offset = offsetof(struct mlx5e_tc_flow, cookie), | ||
| .key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie), | ||
| .automatic_shrinking = true, | ||
| }; | ||
|
|
||
| int mlx5e_tc_init(struct mlx5e_priv *priv) | ||
| { | ||
| struct mlx5e_tc_flow_table *tc = &priv->fts.tc; | ||
|
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| tc->ht_params = mlx5e_tc_flow_ht_params; | ||
| return rhashtable_init(&tc->ht, &tc->ht_params); | ||
| } | ||
|
|
||
| static void _mlx5e_tc_del_flow(void *ptr, void *arg) | ||
| { | ||
| struct mlx5e_tc_flow *flow = ptr; | ||
| struct mlx5e_priv *priv = arg; | ||
|
|
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| mlx5e_tc_del_flow(priv, flow->rule); | ||
| kfree(flow); | ||
| } | ||
|
|
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| void mlx5e_tc_cleanup(struct mlx5e_priv *priv) | ||
| { | ||
| struct mlx5e_tc_flow_table *tc = &priv->fts.tc; | ||
|
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| rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv); | ||
|
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| if (!IS_ERR_OR_NULL(priv->fts.tc.t)) { | ||
| mlx5_destroy_flow_table(priv->fts.tc.t); | ||
| priv->fts.tc.t = NULL; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /* | ||
| * Copyright (c) 2016, Mellanox Technologies. All rights reserved. | ||
| * | ||
| * This software is available to you under a choice of one of two | ||
| * licenses. You may choose to be licensed under the terms of the GNU | ||
| * General Public License (GPL) Version 2, available from the file | ||
| * COPYING in the main directory of this source tree, or the | ||
| * OpenIB.org BSD license below: | ||
| * | ||
| * Redistribution and use in source and binary forms, with or | ||
| * without modification, are permitted provided that the following | ||
| * conditions are met: | ||
| * | ||
| * - Redistributions of source code must retain the above | ||
| * copyright notice, this list of conditions and the following | ||
| * disclaimer. | ||
| * | ||
| * - Redistributions in binary form must reproduce the above | ||
| * copyright notice, this list of conditions and the following | ||
| * disclaimer in the documentation and/or other materials | ||
| * provided with the distribution. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | ||
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | ||
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| #ifndef __MLX5_EN_TC_H__ | ||
| #define __MLX5_EN_TC_H__ | ||
|
|
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| int mlx5e_tc_init(struct mlx5e_priv *priv); | ||
| void mlx5e_tc_cleanup(struct mlx5e_priv *priv); | ||
|
|
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| static inline int mlx5e_tc_num_filters(struct mlx5e_priv *priv) | ||
| { | ||
| return atomic_read(&priv->fts.tc.ht.nelems); | ||
| } | ||
|
|
||
| #endif /* __MLX5_EN_TC_H__ */ |