73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only
|
|
* Copyright (c) 2013-2019, 2021 The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _LINUX_IF_RMNET_H_
|
|
#define _LINUX_IF_RMNET_H_
|
|
|
|
struct rmnet_map_header {
|
|
u8 flags; /* MAP_CMD_FLAG, MAP_PAD_LEN_MASK */
|
|
u8 mux_id;
|
|
__be16 pkt_len; /* Length of packet, including pad */
|
|
} __aligned(1);
|
|
|
|
/* rmnet_map_header flags field:
|
|
* PAD_LEN: number of pad bytes following packet data
|
|
* CMD: 1 = packet contains a MAP command; 0 = packet contains data
|
|
* NEXT_HEADER: 1 = packet contains V5 CSUM header 0 = no V5 CSUM header
|
|
*/
|
|
#define MAP_PAD_LEN_MASK GENMASK(5, 0)
|
|
#define MAP_NEXT_HEADER_FLAG BIT(6)
|
|
#define MAP_CMD_FLAG BIT(7)
|
|
|
|
struct rmnet_map_dl_csum_trailer {
|
|
u8 reserved1;
|
|
u8 flags; /* MAP_CSUM_DL_VALID_FLAG */
|
|
__be16 csum_start_offset;
|
|
__be16 csum_length;
|
|
__sum16 csum_value;
|
|
} __aligned(1);
|
|
|
|
/* rmnet_map_dl_csum_trailer flags field:
|
|
* VALID: 1 = checksum and length valid; 0 = ignore them
|
|
*/
|
|
#define MAP_CSUM_DL_VALID_FLAG BIT(0)
|
|
|
|
struct rmnet_map_ul_csum_header {
|
|
__be16 csum_start_offset;
|
|
__be16 csum_info; /* MAP_CSUM_UL_* */
|
|
} __aligned(1);
|
|
|
|
/* csum_info field:
|
|
* OFFSET: where (offset in bytes) to insert computed checksum
|
|
* UDP: 1 = UDP checksum (zero checkum means no checksum)
|
|
* ENABLED: 1 = checksum computation requested
|
|
*/
|
|
#define MAP_CSUM_UL_OFFSET_MASK GENMASK(13, 0)
|
|
#define MAP_CSUM_UL_UDP_FLAG BIT(14)
|
|
#define MAP_CSUM_UL_ENABLED_FLAG BIT(15)
|
|
|
|
/* MAP CSUM headers */
|
|
struct rmnet_map_v5_csum_header {
|
|
u8 header_info;
|
|
u8 csum_info;
|
|
__be16 reserved;
|
|
} __aligned(1);
|
|
|
|
/* v5 header_info field
|
|
* NEXT_HEADER: represents whether there is any next header
|
|
* HEADER_TYPE: represents the type of this header
|
|
*
|
|
* csum_info field
|
|
* CSUM_VALID_OR_REQ:
|
|
* 1 = for UL, checksum computation is requested.
|
|
* 1 = for DL, validated the checksum and has found it valid
|
|
*/
|
|
|
|
#define MAPV5_HDRINFO_NXT_HDR_FLAG BIT(0)
|
|
#define MAPV5_HDRINFO_HDR_TYPE_FMASK GENMASK(7, 1)
|
|
#define MAPV5_CSUMINFO_VALID_FLAG BIT(7)
|
|
|
|
#define RMNET_MAP_HEADER_TYPE_CSUM_OFFLOAD 2
|
|
#endif /* !(_LINUX_IF_RMNET_H_) */
|