1 /* SPDX-License-Identifier: GPL-2.0-only 2 * Copyright (c) 2013-2019, The Linux Foundation. All rights reserved. 3 */ 4 5 #ifndef _LINUX_IF_RMNET_H_ 6 #define _LINUX_IF_RMNET_H_ 7 8 struct rmnet_map_header { 9 u8 flags; /* MAP_CMD_FLAG, MAP_PAD_LEN_MASK */ 10 u8 mux_id; 11 __be16 pkt_len; /* Length of packet, including pad */ 12 } __aligned(1); 13 14 /* rmnet_map_header flags field: 15 * PAD_LEN: number of pad bytes following packet data 16 * CMD: 1 = packet contains a MAP command; 0 = packet contains data 17 */ 18 #define MAP_PAD_LEN_MASK GENMASK(5, 0) 19 #define MAP_CMD_FLAG BIT(7) 20 21 struct rmnet_map_dl_csum_trailer { 22 u8 reserved1; 23 u8 flags; /* MAP_CSUM_DL_VALID_FLAG */ 24 __be16 csum_start_offset; 25 __be16 csum_length; 26 __be16 csum_value; 27 } __aligned(1); 28 29 /* rmnet_map_dl_csum_trailer flags field: 30 * VALID: 1 = checksum and length valid; 0 = ignore them 31 */ 32 #define MAP_CSUM_DL_VALID_FLAG BIT(0) 33 34 struct rmnet_map_ul_csum_header { 35 __be16 csum_start_offset; 36 __be16 csum_info; /* MAP_CSUM_UL_* */ 37 } __aligned(1); 38 39 /* csum_info field: 40 * OFFSET: where (offset in bytes) to insert computed checksum 41 * UDP: 1 = UDP checksum (zero checkum means no checksum) 42 * ENABLED: 1 = checksum computation requested 43 */ 44 #define MAP_CSUM_UL_OFFSET_MASK GENMASK(13, 0) 45 #define MAP_CSUM_UL_UDP_FLAG BIT(14) 46 #define MAP_CSUM_UL_ENABLED_FLAG BIT(15) 47 48 #endif /* !(_LINUX_IF_RMNET_H_) */ 49