drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_ste_v3.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_ste_v3.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_ste_v3.c
Extension
.c
Size
10791 bytes
Lines
264
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) 2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */

#include "dr_ste_v1.h"
#include "dr_ste_v2.h"

static void dr_ste_v3_set_encap(u8 *hw_ste_p, u8 *d_action,
				u32 reformat_id, int size)
{
	MLX5_SET(ste_double_action_insert_with_ptr_v3, d_action, action_id,
		 DR_STE_V1_ACTION_ID_INSERT_POINTER);
	/* The hardware expects here size in words (2 byte) */
	MLX5_SET(ste_double_action_insert_with_ptr_v3, d_action, size, size / 2);
	MLX5_SET(ste_double_action_insert_with_ptr_v3, d_action, pointer, reformat_id);
	MLX5_SET(ste_double_action_insert_with_ptr_v3, d_action, attributes,
		 DR_STE_V1_ACTION_INSERT_PTR_ATTR_ENCAP);
	dr_ste_v1_set_reparse(hw_ste_p);
}

static void dr_ste_v3_set_push_vlan(u8 *ste, u8 *d_action,
				    u32 vlan_hdr)
{
	MLX5_SET(ste_double_action_insert_with_inline_v3, d_action, action_id,
		 DR_STE_V1_ACTION_ID_INSERT_INLINE);
	/* The hardware expects here offset to vlan header in words (2 byte) */
	MLX5_SET(ste_double_action_insert_with_inline_v3, d_action, start_offset,
		 HDR_LEN_L2_MACS >> 1);
	MLX5_SET(ste_double_action_insert_with_inline_v3, d_action, inline_data, vlan_hdr);
	dr_ste_v1_set_reparse(ste);
}

static void dr_ste_v3_set_pop_vlan(u8 *hw_ste_p, u8 *s_action,
				   u8 vlans_num)
{
	MLX5_SET(ste_single_action_remove_header_size_v3, s_action,
		 action_id, DR_STE_V1_ACTION_ID_REMOVE_BY_SIZE);
	MLX5_SET(ste_single_action_remove_header_size_v3, s_action,
		 start_anchor, DR_STE_HEADER_ANCHOR_1ST_VLAN);
	/* The hardware expects here size in words (2 byte) */
	MLX5_SET(ste_single_action_remove_header_size_v3, s_action,
		 remove_size, (HDR_LEN_L2_VLAN >> 1) * vlans_num);

	dr_ste_v1_set_reparse(hw_ste_p);
}

static void dr_ste_v3_set_encap_l3(u8 *hw_ste_p,
				   u8 *frst_s_action,
				   u8 *scnd_d_action,
				   u32 reformat_id,
				   int size)
{
	/* Remove L2 headers */
	MLX5_SET(ste_single_action_remove_header_v3, frst_s_action, action_id,
		 DR_STE_V1_ACTION_ID_REMOVE_HEADER_TO_HEADER);
	MLX5_SET(ste_single_action_remove_header_v3, frst_s_action, end_anchor,
		 DR_STE_HEADER_ANCHOR_IPV6_IPV4);

	/* Encapsulate with given reformat ID */
	MLX5_SET(ste_double_action_insert_with_ptr_v3, scnd_d_action, action_id,
		 DR_STE_V1_ACTION_ID_INSERT_POINTER);
	/* The hardware expects here size in words (2 byte) */
	MLX5_SET(ste_double_action_insert_with_ptr_v3, scnd_d_action, size, size / 2);
	MLX5_SET(ste_double_action_insert_with_ptr_v3, scnd_d_action, pointer, reformat_id);
	MLX5_SET(ste_double_action_insert_with_ptr_v3, scnd_d_action, attributes,
		 DR_STE_V1_ACTION_INSERT_PTR_ATTR_ENCAP);

	dr_ste_v1_set_reparse(hw_ste_p);
}

static void dr_ste_v3_set_rx_decap(u8 *hw_ste_p, u8 *s_action)
{
	MLX5_SET(ste_single_action_remove_header_v3, s_action, action_id,
		 DR_STE_V1_ACTION_ID_REMOVE_HEADER_TO_HEADER);
	MLX5_SET(ste_single_action_remove_header_v3, s_action, decap, 1);
	MLX5_SET(ste_single_action_remove_header_v3, s_action, vni_to_cqe, 1);
	MLX5_SET(ste_single_action_remove_header_v3, s_action, end_anchor,
		 DR_STE_HEADER_ANCHOR_INNER_MAC);

	dr_ste_v1_set_reparse(hw_ste_p);
}

static void dr_ste_v3_set_insert_hdr(u8 *hw_ste_p, u8 *d_action,
				     u32 reformat_id, u8 anchor,
				     u8 offset, int size)
{
	MLX5_SET(ste_double_action_insert_with_ptr_v3, d_action,
		 action_id, DR_STE_V1_ACTION_ID_INSERT_POINTER);
	MLX5_SET(ste_double_action_insert_with_ptr_v3, d_action,
		 start_anchor, anchor);

Annotation

Implementation Notes