projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 9395da4e | 1 | /* SPDX-License-Identifier: GPL-2.0-only |
| e1d9a90a | 2 | * Copyright (c) 2013-2019, 2021 The Linux Foundation. All rights reserved. |
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3 | */ |
| 4 | ||
| 5 | #ifndef _LINUX_IF_RMNET_H_ | |
| 6 | #define _LINUX_IF_RMNET_H_ | |
| 7 | ||
| 8 | struct rmnet_map_header { | |
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9 | u8 flags; /* MAP_CMD_FLAG, MAP_PAD_LEN_MASK */ |
| 10 | u8 mux_id; | |
| 11 | __be16 pkt_len; /* Length of packet, including pad */ | |
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12 | } __aligned(1); |
| 13 | ||
| 16653c16 | 14 | /* rmnet_map_header flags field: |
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15 | * PAD_LEN: number of pad bytes following packet data |
| 16 | * CMD: 1 = packet contains a MAP command; 0 = packet contains data | |
| 17 | * NEXT_HEADER: 1 = packet contains V5 CSUM header 0 = no V5 CSUM header | |
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18 | */ |
| 19 | #define MAP_PAD_LEN_MASK GENMASK(5, 0) | |
| e1d9a90a | 20 | #define MAP_NEXT_HEADER_FLAG BIT(6) |
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21 | #define MAP_CMD_FLAG BIT(7) |
| 22 | ||
| 9395da4e | 23 | struct rmnet_map_dl_csum_trailer { |
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24 | u8 reserved1; |
| 25 | u8 flags; /* MAP_CSUM_DL_VALID_FLAG */ | |
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26 | __be16 csum_start_offset; |
| 27 | __be16 csum_length; | |
| be754f64 | 28 | __sum16 csum_value; |
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29 | } __aligned(1); |
| 30 | ||
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31 | /* rmnet_map_dl_csum_trailer flags field: |
| 32 | * VALID: 1 = checksum and length valid; 0 = ignore them | |
| 33 | */ | |
| 34 | #define MAP_CSUM_DL_VALID_FLAG BIT(0) | |
| 35 | ||
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36 | struct rmnet_map_ul_csum_header { |
| 37 | __be16 csum_start_offset; | |
| 86ca860e | 38 | __be16 csum_info; /* MAP_CSUM_UL_* */ |
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39 | } __aligned(1); |
| 40 | ||
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41 | /* csum_info field: |
| 42 | * OFFSET: where (offset in bytes) to insert computed checksum | |
| 43 | * UDP: 1 = UDP checksum (zero checkum means no checksum) | |
| 44 | * ENABLED: 1 = checksum computation requested | |
| 45 | */ | |
| 46 | #define MAP_CSUM_UL_OFFSET_MASK GENMASK(13, 0) | |
| 47 | #define MAP_CSUM_UL_UDP_FLAG BIT(14) | |
| 48 | #define MAP_CSUM_UL_ENABLED_FLAG BIT(15) | |
| 49 | ||
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50 | /* MAP CSUM headers */ |
| 51 | struct rmnet_map_v5_csum_header { | |
| 52 | u8 header_info; | |
| 53 | u8 csum_info; | |
| 54 | __be16 reserved; | |
| 55 | } __aligned(1); | |
| 56 | ||
| 57 | /* v5 header_info field | |
| 58 | * NEXT_HEADER: represents whether there is any next header | |
| 59 | * HEADER_TYPE: represents the type of this header | |
| 60 | * | |
| 61 | * csum_info field | |
| 62 | * CSUM_VALID_OR_REQ: | |
| 63 | * 1 = for UL, checksum computation is requested. | |
| 64 | * 1 = for DL, validated the checksum and has found it valid | |
| 65 | */ | |
| 66 | ||
| 67 | #define MAPV5_HDRINFO_NXT_HDR_FLAG BIT(0) | |
| 68 | #define MAPV5_HDRINFO_HDR_TYPE_FMASK GENMASK(7, 1) | |
| 69 | #define MAPV5_CSUMINFO_VALID_FLAG BIT(7) | |
| 70 | ||
| 71 | #define RMNET_MAP_HEADER_TYPE_CSUM_OFFLOAD 2 | |
| 9395da4e | 72 | #endif /* !(_LINUX_IF_RMNET_H_) */ |