projects / mirror_ubuntu-hirsute-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 36b1e47f MG |
1 | /* SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB) */ |
| 2 | /* | |
| 3 | * Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved. | |
| 4 | */ | |
| 5 | ||
| 6 | #ifndef _RDMA_SIGNATURE_H_ | |
| 7 | #define _RDMA_SIGNATURE_H_ | |
| 8 | ||
| 9 | enum ib_signature_prot_cap { | |
| 10 | IB_PROT_T10DIF_TYPE_1 = 1, | |
| 11 | IB_PROT_T10DIF_TYPE_2 = 1 << 1, | |
| 12 | IB_PROT_T10DIF_TYPE_3 = 1 << 2, | |
| 13 | }; | |
| 14 | ||
| 15 | enum ib_signature_guard_cap { | |
| 16 | IB_GUARD_T10DIF_CRC = 1, | |
| 17 | IB_GUARD_T10DIF_CSUM = 1 << 1, | |
| 18 | }; | |
| 19 | ||
| 20 | /** | |
| 21 | * enum ib_signature_type - Signature types | |
| 22 | * @IB_SIG_TYPE_NONE: Unprotected. | |
| 23 | * @IB_SIG_TYPE_T10_DIF: Type T10-DIF | |
| 24 | */ | |
| 25 | enum ib_signature_type { | |
| 26 | IB_SIG_TYPE_NONE, | |
| 27 | IB_SIG_TYPE_T10_DIF, | |
| 28 | }; | |
| 29 | ||
| 30 | /** | |
| 31 | * enum ib_t10_dif_bg_type - Signature T10-DIF block-guard types | |
| 32 | * @IB_T10DIF_CRC: Corresponds to T10-PI mandated CRC checksum rules. | |
| 33 | * @IB_T10DIF_CSUM: Corresponds to IP checksum rules. | |
| 34 | */ | |
| 35 | enum ib_t10_dif_bg_type { | |
| 36 | IB_T10DIF_CRC, | |
| 37 | IB_T10DIF_CSUM, | |
| 38 | }; | |
| 39 | ||
| 40 | /** | |
| 41 | * struct ib_t10_dif_domain - Parameters specific for T10-DIF | |
| 42 | * domain. | |
| 43 | * @bg_type: T10-DIF block guard type (CRC|CSUM) | |
| 44 | * @pi_interval: protection information interval. | |
| 45 | * @bg: seed of guard computation. | |
| 46 | * @app_tag: application tag of guard block | |
| 47 | * @ref_tag: initial guard block reference tag. | |
| 48 | * @ref_remap: Indicate wethear the reftag increments each block | |
| 49 | * @app_escape: Indicate to skip block check if apptag=0xffff | |
| 50 | * @ref_escape: Indicate to skip block check if reftag=0xffffffff | |
| 51 | * @apptag_check_mask: check bitmask of application tag. | |
| 52 | */ | |
| 53 | struct ib_t10_dif_domain { | |
| 54 | enum ib_t10_dif_bg_type bg_type; | |
| 55 | u16 pi_interval; | |
| 56 | u16 bg; | |
| 57 | u16 app_tag; | |
| 58 | u32 ref_tag; | |
| 59 | bool ref_remap; | |
| 60 | bool app_escape; | |
| 61 | bool ref_escape; | |
| 62 | u16 apptag_check_mask; | |
| 63 | }; | |
| 64 | ||
| 65 | /** | |
| 66 | * struct ib_sig_domain - Parameters for signature domain | |
| 67 | * @sig_type: specific signauture type | |
| 68 | * @sig: union of all signature domain attributes that may | |
| 69 | * be used to set domain layout. | |
| 70 | */ | |
| 71 | struct ib_sig_domain { | |
| 72 | enum ib_signature_type sig_type; | |
| 73 | union { | |
| 74 | struct ib_t10_dif_domain dif; | |
| 75 | } sig; | |
| 76 | }; | |
| 77 | ||
| 78 | /** | |
| 79 | * struct ib_sig_attrs - Parameters for signature handover operation | |
| 80 | * @check_mask: bitmask for signature byte check (8 bytes) | |
| 81 | * @mem: memory domain layout descriptor. | |
| 82 | * @wire: wire domain layout descriptor. | |
| 83 | */ | |
| 84 | struct ib_sig_attrs { | |
| 85 | u8 check_mask; | |
| 86 | struct ib_sig_domain mem; | |
| 87 | struct ib_sig_domain wire; | |
| 88 | }; | |
| 89 | ||
| 90 | enum ib_sig_err_type { | |
| 91 | IB_SIG_BAD_GUARD, | |
| 92 | IB_SIG_BAD_REFTAG, | |
| 93 | IB_SIG_BAD_APPTAG, | |
| 94 | }; | |
| 95 | ||
| 96 | /* | |
| 97 | * Signature check masks (8 bytes in total) according to the T10-PI standard: | |
| 98 | * -------- -------- ------------ | |
| 99 | * | GUARD | APPTAG | REFTAG | | |
| 100 | * | 2B | 2B | 4B | | |
| 101 | * -------- -------- ------------ | |
| 102 | */ | |
| 103 | enum { | |
| 104 | IB_SIG_CHECK_GUARD = 0xc0, | |
| 105 | IB_SIG_CHECK_APPTAG = 0x30, | |
| 106 | IB_SIG_CHECK_REFTAG = 0x0f, | |
| 107 | }; | |
| 108 | ||
| 109 | /* | |
| 110 | * struct ib_sig_err - signature error descriptor | |
| 111 | */ | |
| 112 | struct ib_sig_err { | |
| 113 | enum ib_sig_err_type err_type; | |
| 114 | u32 expected; | |
| 115 | u32 actual; | |
| 116 | u64 sig_err_offset; | |
| 117 | u32 key; | |
| 118 | }; | |
| 119 | ||
| 120 | #endif /* _RDMA_SIGNATURE_H_ */ |