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net/mlx5: HWS, support flow sampler destination

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Since sampler isn't currently supported via HWS, use a FW island
that forwards any packets to the supplied sampler.

Signed-off-by: Vlad Dogaru <vdogaru@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20250102181415.1477316-15-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Vlad Dogaru
2025-01-02 20:14:13 +02:00
committed by Jakub Kicinski
parent 85ab9ea325
commit 663e61225c
3 changed files with 60 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/net/ethernet/mellanox/mlx5/core/steering/hws/action.c
View File

@@ -471,6 +471,7 @@ static void hws_action_fill_stc_attr(struct mlx5hws_action *action,
break;
case MLX5HWS_ACTION_TYP_TBL:
case MLX5HWS_ACTION_TYP_DEST_ARRAY:
case MLX5HWS_ACTION_TYP_SAMPLER:
attr->action_type = MLX5_IFC_STC_ACTION_TYPE_JUMP_TO_FT;
attr->action_offset = MLX5HWS_ACTION_OFFSET_HIT;
attr->dest_table_id = obj_id;
@@ -1873,7 +1874,50 @@ struct mlx5hws_action *
mlx5hws_action_create_flow_sampler(struct mlx5hws_context *ctx,
u32 sampler_id, u32 flags)
{
mlx5hws_err(ctx, "Flow sampler action - unsupported\n");
struct mlx5hws_cmd_ft_create_attr ft_attr = {0};
struct mlx5hws_cmd_set_fte_attr fte_attr = {0};
struct mlx5hws_cmd_forward_tbl *fw_island;
struct mlx5hws_cmd_set_fte_dest dest;
struct mlx5hws_action *action;
int ret;
if (flags != (MLX5HWS_ACTION_FLAG_HWS_FDB | MLX5HWS_ACTION_FLAG_SHARED)) {
mlx5hws_err(ctx, "Unsupported flags for flow sampler\n");
return NULL;
}
ft_attr.type = FS_FT_FDB;
ft_attr.level = ctx->caps->fdb_ft.max_level - 1;
dest.destination_type = MLX5_FLOW_DESTINATION_TYPE_FLOW_SAMPLER;
dest.destination_id = sampler_id;
fte_attr.dests_num = 1;
fte_attr.dests = &dest;
fte_attr.action_flags = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
fte_attr.ignore_flow_level = 1;
fw_island = mlx5hws_cmd_forward_tbl_create(ctx->mdev, &ft_attr, &fte_attr);
if (!fw_island)
return NULL;
action = hws_action_create_generic(ctx, flags,
MLX5HWS_ACTION_TYP_SAMPLER);
if (!action)
goto destroy_fw_island;
ret = hws_action_create_stcs(action, fw_island->ft_id);
if (ret)
goto free_action;
action->flow_sampler.fw_island = fw_island;
return action;
free_action:
kfree(action);
destroy_fw_island:
mlx5hws_cmd_forward_tbl_destroy(ctx->mdev, fw_island);
return NULL;
}
@@ -1912,6 +1956,11 @@ static void hws_action_destroy_hws(struct mlx5hws_action *action)
}
kfree(action->dest_array.dest_list);
break;
case MLX5HWS_ACTION_TYP_SAMPLER:
hws_action_destroy_stcs(action);
mlx5hws_cmd_forward_tbl_destroy(action->ctx->mdev,
action->flow_sampler.fw_island);
break;
case MLX5HWS_ACTION_TYP_REFORMAT_TNL_L3_TO_L2:
case MLX5HWS_ACTION_TYP_MODIFY_HDR:
shared_arg = false;
@@ -2429,6 +2478,7 @@ int mlx5hws_action_template_process(struct mlx5hws_action_template *at)
case MLX5HWS_ACTION_TYP_DROP:
case MLX5HWS_ACTION_TYP_TBL:
case MLX5HWS_ACTION_TYP_DEST_ARRAY:
case MLX5HWS_ACTION_TYP_SAMPLER:
case MLX5HWS_ACTION_TYP_VPORT:
case MLX5HWS_ACTION_TYP_MISS:
/* Hit action */

3
drivers/net/ethernet/mellanox/mlx5/core/steering/hws/action.h
View File

@@ -165,6 +165,9 @@ struct mlx5hws_action {
size_t num_dest;
struct mlx5hws_cmd_set_fte_dest *dest_list;
} dest_array;
struct {
struct mlx5hws_cmd_forward_tbl *fw_island;
} flow_sampler;
struct {
u8 type;
u8 start_anchor;

6
drivers/net/ethernet/mellanox/mlx5/core/steering/hws/cmd.c
View File

@@ -257,6 +257,12 @@ int mlx5hws_cmd_set_fte(struct mlx5_core_dev *mdev,
dest->ext_reformat_id);
}
break;
case MLX5_FLOW_DESTINATION_TYPE_FLOW_SAMPLER:
MLX5_SET(dest_format, in_dests,
destination_type, ifc_dest_type);
MLX5_SET(dest_format, in_dests, destination_id,
dest->destination_id);
break;
default:
ret = -EOPNOTSUPP;
goto out;