19395da4eSSubash Abhinov Kasiviswanathan /* SPDX-License-Identifier: GPL-2.0-only 2e1d9a90aSSharath Chandra Vurukala * Copyright (c) 2013-2019, 2021 The Linux Foundation. All rights reserved. 39395da4eSSubash Abhinov Kasiviswanathan */ 49395da4eSSubash Abhinov Kasiviswanathan 59395da4eSSubash Abhinov Kasiviswanathan #ifndef _LINUX_IF_RMNET_H_ 69395da4eSSubash Abhinov Kasiviswanathan #define _LINUX_IF_RMNET_H_ 79395da4eSSubash Abhinov Kasiviswanathan 8*5f10376bSJakub Kicinski #include <linux/types.h> 9*5f10376bSJakub Kicinski 109395da4eSSubash Abhinov Kasiviswanathan struct rmnet_map_header { 1116653c16SAlex Elder u8 flags; /* MAP_CMD_FLAG, MAP_PAD_LEN_MASK */ 129395da4eSSubash Abhinov Kasiviswanathan u8 mux_id; 1316653c16SAlex Elder __be16 pkt_len; /* Length of packet, including pad */ 149395da4eSSubash Abhinov Kasiviswanathan } __aligned(1); 159395da4eSSubash Abhinov Kasiviswanathan 1616653c16SAlex Elder /* rmnet_map_header flags field: 1716653c16SAlex Elder * PAD_LEN: number of pad bytes following packet data 1816653c16SAlex Elder * CMD: 1 = packet contains a MAP command; 0 = packet contains data 19e1d9a90aSSharath Chandra Vurukala * NEXT_HEADER: 1 = packet contains V5 CSUM header 0 = no V5 CSUM header 2016653c16SAlex Elder */ 2116653c16SAlex Elder #define MAP_PAD_LEN_MASK GENMASK(5, 0) 22e1d9a90aSSharath Chandra Vurukala #define MAP_NEXT_HEADER_FLAG BIT(6) 2316653c16SAlex Elder #define MAP_CMD_FLAG BIT(7) 2416653c16SAlex Elder 259395da4eSSubash Abhinov Kasiviswanathan struct rmnet_map_dl_csum_trailer { 269395da4eSSubash Abhinov Kasiviswanathan u8 reserved1; 27cc1b21baSAlex Elder u8 flags; /* MAP_CSUM_DL_VALID_FLAG */ 2845f3a13cSAlex Elder __be16 csum_start_offset; 2945f3a13cSAlex Elder __be16 csum_length; 30be754f64SAlex Elder __sum16 csum_value; 319395da4eSSubash Abhinov Kasiviswanathan } __aligned(1); 329395da4eSSubash Abhinov Kasiviswanathan 33cc1b21baSAlex Elder /* rmnet_map_dl_csum_trailer flags field: 34cc1b21baSAlex Elder * VALID: 1 = checksum and length valid; 0 = ignore them 35cc1b21baSAlex Elder */ 36cc1b21baSAlex Elder #define MAP_CSUM_DL_VALID_FLAG BIT(0) 37cc1b21baSAlex Elder 389395da4eSSubash Abhinov Kasiviswanathan struct rmnet_map_ul_csum_header { 399395da4eSSubash Abhinov Kasiviswanathan __be16 csum_start_offset; 4086ca860eSAlex Elder __be16 csum_info; /* MAP_CSUM_UL_* */ 419395da4eSSubash Abhinov Kasiviswanathan } __aligned(1); 429395da4eSSubash Abhinov Kasiviswanathan 4386ca860eSAlex Elder /* csum_info field: 4486ca860eSAlex Elder * OFFSET: where (offset in bytes) to insert computed checksum 4586ca860eSAlex Elder * UDP: 1 = UDP checksum (zero checkum means no checksum) 4686ca860eSAlex Elder * ENABLED: 1 = checksum computation requested 4786ca860eSAlex Elder */ 4886ca860eSAlex Elder #define MAP_CSUM_UL_OFFSET_MASK GENMASK(13, 0) 4986ca860eSAlex Elder #define MAP_CSUM_UL_UDP_FLAG BIT(14) 5086ca860eSAlex Elder #define MAP_CSUM_UL_ENABLED_FLAG BIT(15) 5186ca860eSAlex Elder 52e1d9a90aSSharath Chandra Vurukala /* MAP CSUM headers */ 53e1d9a90aSSharath Chandra Vurukala struct rmnet_map_v5_csum_header { 54e1d9a90aSSharath Chandra Vurukala u8 header_info; 55e1d9a90aSSharath Chandra Vurukala u8 csum_info; 56e1d9a90aSSharath Chandra Vurukala __be16 reserved; 57e1d9a90aSSharath Chandra Vurukala } __aligned(1); 58e1d9a90aSSharath Chandra Vurukala 59e1d9a90aSSharath Chandra Vurukala /* v5 header_info field 60e1d9a90aSSharath Chandra Vurukala * NEXT_HEADER: represents whether there is any next header 61e1d9a90aSSharath Chandra Vurukala * HEADER_TYPE: represents the type of this header 62e1d9a90aSSharath Chandra Vurukala * 63e1d9a90aSSharath Chandra Vurukala * csum_info field 64e1d9a90aSSharath Chandra Vurukala * CSUM_VALID_OR_REQ: 65e1d9a90aSSharath Chandra Vurukala * 1 = for UL, checksum computation is requested. 66e1d9a90aSSharath Chandra Vurukala * 1 = for DL, validated the checksum and has found it valid 67e1d9a90aSSharath Chandra Vurukala */ 68e1d9a90aSSharath Chandra Vurukala 69e1d9a90aSSharath Chandra Vurukala #define MAPV5_HDRINFO_NXT_HDR_FLAG BIT(0) 70e1d9a90aSSharath Chandra Vurukala #define MAPV5_HDRINFO_HDR_TYPE_FMASK GENMASK(7, 1) 71e1d9a90aSSharath Chandra Vurukala #define MAPV5_CSUMINFO_VALID_FLAG BIT(7) 72e1d9a90aSSharath Chandra Vurukala 73e1d9a90aSSharath Chandra Vurukala #define RMNET_MAP_HEADER_TYPE_CSUM_OFFLOAD 2 749395da4eSSubash Abhinov Kasiviswanathan #endif /* !(_LINUX_IF_RMNET_H_) */ 75