drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_fw.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_fw.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_fw.c
Extension
.c
Size
5134 bytes
Lines
172
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2019 Mellanox Technologies. */

#include <linux/types.h>
#include "dr_types.h"

struct mlx5dr_fw_recalc_cs_ft *
mlx5dr_fw_create_recalc_cs_ft(struct mlx5dr_domain *dmn, u16 vport_num)
{
	struct mlx5dr_cmd_create_flow_table_attr ft_attr = {};
	struct mlx5dr_fw_recalc_cs_ft *recalc_cs_ft;
	u32 table_id, group_id, modify_hdr_id;
	u64 rx_icm_addr, modify_ttl_action;
	int ret;

	recalc_cs_ft = kzalloc_obj(*recalc_cs_ft);
	if (!recalc_cs_ft)
		return NULL;

	ft_attr.table_type = MLX5_FLOW_TABLE_TYPE_FDB;
	ft_attr.level = dmn->info.caps.max_ft_level - 1;
	ft_attr.term_tbl = true;

	ret = mlx5dr_cmd_create_flow_table(dmn->mdev,
					   &ft_attr,
					   &rx_icm_addr,
					   &table_id);
	if (ret) {
		mlx5dr_err(dmn, "Failed creating TTL W/A FW flow table %d\n", ret);
		goto free_ttl_tbl;
	}

	ret = mlx5dr_cmd_create_empty_flow_group(dmn->mdev,
						 MLX5_FLOW_TABLE_TYPE_FDB,
						 table_id, &group_id);
	if (ret) {
		mlx5dr_err(dmn, "Failed creating TTL W/A FW flow group %d\n", ret);
		goto destroy_flow_table;
	}

	/* Modify TTL action by adding zero to trigger CS recalculation */
	modify_ttl_action = 0;
	MLX5_SET(set_action_in, &modify_ttl_action, action_type, MLX5_ACTION_TYPE_ADD);
	MLX5_SET(set_action_in, &modify_ttl_action, field, MLX5_ACTION_IN_FIELD_OUT_IP_TTL);

	ret = mlx5dr_cmd_alloc_modify_header(dmn->mdev, MLX5_FLOW_TABLE_TYPE_FDB, 1,
					     &modify_ttl_action,
					     &modify_hdr_id);
	if (ret) {
		mlx5dr_err(dmn, "Failed modify header TTL %d\n", ret);
		goto destroy_flow_group;
	}

	ret = mlx5dr_cmd_set_fte_modify_and_vport(dmn->mdev,
						  MLX5_FLOW_TABLE_TYPE_FDB,
						  table_id, group_id, modify_hdr_id,
						  vport_num);
	if (ret) {
		mlx5dr_err(dmn, "Failed setting TTL W/A flow table entry %d\n", ret);
		goto dealloc_modify_header;
	}

	recalc_cs_ft->modify_hdr_id = modify_hdr_id;
	recalc_cs_ft->rx_icm_addr = rx_icm_addr;
	recalc_cs_ft->table_id = table_id;
	recalc_cs_ft->group_id = group_id;

	return recalc_cs_ft;

dealloc_modify_header:
	mlx5dr_cmd_dealloc_modify_header(dmn->mdev, modify_hdr_id);
destroy_flow_group:
	mlx5dr_cmd_destroy_flow_group(dmn->mdev,
				      MLX5_FLOW_TABLE_TYPE_FDB,
				      table_id, group_id);
destroy_flow_table:
	mlx5dr_cmd_destroy_flow_table(dmn->mdev, table_id, MLX5_FLOW_TABLE_TYPE_FDB);
free_ttl_tbl:
	kfree(recalc_cs_ft);
	return NULL;
}

void mlx5dr_fw_destroy_recalc_cs_ft(struct mlx5dr_domain *dmn,
				    struct mlx5dr_fw_recalc_cs_ft *recalc_cs_ft)
{
	mlx5dr_cmd_del_flow_table_entry(dmn->mdev,
					MLX5_FLOW_TABLE_TYPE_FDB,
					recalc_cs_ft->table_id);
	mlx5dr_cmd_dealloc_modify_header(dmn->mdev, recalc_cs_ft->modify_hdr_id);
	mlx5dr_cmd_destroy_flow_group(dmn->mdev,

Annotation

Implementation Notes