1 /* SPDX-License-Identifier: GPL-2.0-only 1 /* SPDX-License-Identifier: GPL-2.0-only
2 * Copyright (c) 2013-2019, 2021 The Linux Fou !! 2 * Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
3 */ 3 */
4 4
5 #ifndef _LINUX_IF_RMNET_H_ 5 #ifndef _LINUX_IF_RMNET_H_
6 #define _LINUX_IF_RMNET_H_ 6 #define _LINUX_IF_RMNET_H_
7 7
8 #include <linux/types.h> <<
9 <<
10 struct rmnet_map_header { 8 struct rmnet_map_header {
11 u8 flags; /* MAP !! 9 #if defined(__LITTLE_ENDIAN_BITFIELD)
12 u8 mux_id; !! 10 u8 pad_len:6;
13 __be16 pkt_len; /* Len !! 11 u8 reserved_bit:1;
>> 12 u8 cd_bit:1;
>> 13 #elif defined (__BIG_ENDIAN_BITFIELD)
>> 14 u8 cd_bit:1;
>> 15 u8 reserved_bit:1;
>> 16 u8 pad_len:6;
>> 17 #else
>> 18 #error "Please fix <asm/byteorder.h>"
>> 19 #endif
>> 20 u8 mux_id;
>> 21 __be16 pkt_len;
14 } __aligned(1); 22 } __aligned(1);
15 23
16 /* rmnet_map_header flags field: <<
17 * PAD_LEN: number of pad bytes followin <<
18 * CMD: 1 = packet contains a MAP co <<
19 * NEXT_HEADER: 1 = packet contains V5 CSUM h <<
20 */ <<
21 #define MAP_PAD_LEN_MASK GENMAS <<
22 #define MAP_NEXT_HEADER_FLAG BIT(6) <<
23 #define MAP_CMD_FLAG BIT(7) <<
24 <<
25 struct rmnet_map_dl_csum_trailer { 24 struct rmnet_map_dl_csum_trailer {
26 u8 reserved1; !! 25 u8 reserved1;
27 u8 flags; /* MAP !! 26 #if defined(__LITTLE_ENDIAN_BITFIELD)
28 __be16 csum_start_offset; !! 27 u8 valid:1;
29 __be16 csum_length; !! 28 u8 reserved2:7;
30 __sum16 csum_value; !! 29 #elif defined (__BIG_ENDIAN_BITFIELD)
>> 30 u8 reserved2:7;
>> 31 u8 valid:1;
>> 32 #else
>> 33 #error "Please fix <asm/byteorder.h>"
>> 34 #endif
>> 35 u16 csum_start_offset;
>> 36 u16 csum_length;
>> 37 __be16 csum_value;
31 } __aligned(1); 38 } __aligned(1);
32 39
33 /* rmnet_map_dl_csum_trailer flags field: <<
34 * VALID: 1 = checksum and length valid; <<
35 */ <<
36 #define MAP_CSUM_DL_VALID_FLAG BIT(0) <<
37 <<
38 struct rmnet_map_ul_csum_header { 40 struct rmnet_map_ul_csum_header {
39 __be16 csum_start_offset; 41 __be16 csum_start_offset;
40 __be16 csum_info; /* MAP !! 42 #if defined(__LITTLE_ENDIAN_BITFIELD)
>> 43 u16 csum_insert_offset:14;
>> 44 u16 udp_ind:1;
>> 45 u16 csum_enabled:1;
>> 46 #elif defined (__BIG_ENDIAN_BITFIELD)
>> 47 u16 csum_enabled:1;
>> 48 u16 udp_ind:1;
>> 49 u16 csum_insert_offset:14;
>> 50 #else
>> 51 #error "Please fix <asm/byteorder.h>"
>> 52 #endif
41 } __aligned(1); 53 } __aligned(1);
42 54
43 /* csum_info field: <<
44 * OFFSET: where (offset in bytes) to ins <<
45 * UDP: 1 = UDP checksum (zero checksu <<
46 * ENABLED: 1 = checksum computation reque <<
47 */ <<
48 #define MAP_CSUM_UL_OFFSET_MASK GENMAS <<
49 #define MAP_CSUM_UL_UDP_FLAG BIT(14 <<
50 #define MAP_CSUM_UL_ENABLED_FLAG BIT(15 <<
51 <<
52 /* MAP CSUM headers */ <<
53 struct rmnet_map_v5_csum_header { <<
54 u8 header_info; <<
55 u8 csum_info; <<
56 __be16 reserved; <<
57 } __aligned(1); <<
58 <<
59 /* v5 header_info field <<
60 * NEXT_HEADER: represents whether there is an <<
61 * HEADER_TYPE: represents the type of this he <<
62 * <<
63 * csum_info field <<
64 * CSUM_VALID_OR_REQ: <<
65 * 1 = for UL, checksum computation is request <<
66 * 1 = for DL, validated the checksum and has <<
67 */ <<
68 <<
69 #define MAPV5_HDRINFO_NXT_HDR_FLAG BIT(0) <<
70 #define MAPV5_HDRINFO_HDR_TYPE_FMASK GENMAS <<
71 #define MAPV5_CSUMINFO_VALID_FLAG BIT(7) <<
72 <<
73 #define RMNET_MAP_HEADER_TYPE_CSUM_OFFLOAD 2 <<
74 #endif /* !(_LINUX_IF_RMNET_H_) */ 55 #endif /* !(_LINUX_IF_RMNET_H_) */
75 56
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