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RDMA/core: Introduce new header file for signature operations
Ease the exhausted ib_verbs.h file and make the code more readable. Signed-off-by: Max Gurtovoy <[email protected]> Signed-off-by: Israel Rukshin <[email protected]> Reviewed-by: Leon Romanovsky <[email protected]> Reviewed-by: Sagi Grimberg <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| /* SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB) */ | ||
| /* | ||
| * Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved. | ||
| */ | ||
|
|
||
| #ifndef _RDMA_SIGNATURE_H_ | ||
| #define _RDMA_SIGNATURE_H_ | ||
|
|
||
| enum ib_signature_prot_cap { | ||
| IB_PROT_T10DIF_TYPE_1 = 1, | ||
| IB_PROT_T10DIF_TYPE_2 = 1 << 1, | ||
| IB_PROT_T10DIF_TYPE_3 = 1 << 2, | ||
| }; | ||
|
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||
| enum ib_signature_guard_cap { | ||
| IB_GUARD_T10DIF_CRC = 1, | ||
| IB_GUARD_T10DIF_CSUM = 1 << 1, | ||
| }; | ||
|
|
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| /** | ||
| * enum ib_signature_type - Signature types | ||
| * @IB_SIG_TYPE_NONE: Unprotected. | ||
| * @IB_SIG_TYPE_T10_DIF: Type T10-DIF | ||
| */ | ||
| enum ib_signature_type { | ||
| IB_SIG_TYPE_NONE, | ||
| IB_SIG_TYPE_T10_DIF, | ||
| }; | ||
|
|
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| /** | ||
| * enum ib_t10_dif_bg_type - Signature T10-DIF block-guard types | ||
| * @IB_T10DIF_CRC: Corresponds to T10-PI mandated CRC checksum rules. | ||
| * @IB_T10DIF_CSUM: Corresponds to IP checksum rules. | ||
| */ | ||
| enum ib_t10_dif_bg_type { | ||
| IB_T10DIF_CRC, | ||
| IB_T10DIF_CSUM, | ||
| }; | ||
|
|
||
| /** | ||
| * struct ib_t10_dif_domain - Parameters specific for T10-DIF | ||
| * domain. | ||
| * @bg_type: T10-DIF block guard type (CRC|CSUM) | ||
| * @pi_interval: protection information interval. | ||
| * @bg: seed of guard computation. | ||
| * @app_tag: application tag of guard block | ||
| * @ref_tag: initial guard block reference tag. | ||
| * @ref_remap: Indicate wethear the reftag increments each block | ||
| * @app_escape: Indicate to skip block check if apptag=0xffff | ||
| * @ref_escape: Indicate to skip block check if reftag=0xffffffff | ||
| * @apptag_check_mask: check bitmask of application tag. | ||
| */ | ||
| struct ib_t10_dif_domain { | ||
| enum ib_t10_dif_bg_type bg_type; | ||
| u16 pi_interval; | ||
| u16 bg; | ||
| u16 app_tag; | ||
| u32 ref_tag; | ||
| bool ref_remap; | ||
| bool app_escape; | ||
| bool ref_escape; | ||
| u16 apptag_check_mask; | ||
| }; | ||
|
|
||
| /** | ||
| * struct ib_sig_domain - Parameters for signature domain | ||
| * @sig_type: specific signauture type | ||
| * @sig: union of all signature domain attributes that may | ||
| * be used to set domain layout. | ||
| */ | ||
| struct ib_sig_domain { | ||
| enum ib_signature_type sig_type; | ||
| union { | ||
| struct ib_t10_dif_domain dif; | ||
| } sig; | ||
| }; | ||
|
|
||
| /** | ||
| * struct ib_sig_attrs - Parameters for signature handover operation | ||
| * @check_mask: bitmask for signature byte check (8 bytes) | ||
| * @mem: memory domain layout descriptor. | ||
| * @wire: wire domain layout descriptor. | ||
| */ | ||
| struct ib_sig_attrs { | ||
| u8 check_mask; | ||
| struct ib_sig_domain mem; | ||
| struct ib_sig_domain wire; | ||
| }; | ||
|
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||
| enum ib_sig_err_type { | ||
| IB_SIG_BAD_GUARD, | ||
| IB_SIG_BAD_REFTAG, | ||
| IB_SIG_BAD_APPTAG, | ||
| }; | ||
|
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| /* | ||
| * Signature check masks (8 bytes in total) according to the T10-PI standard: | ||
| * -------- -------- ------------ | ||
| * | GUARD | APPTAG | REFTAG | | ||
| * | 2B | 2B | 4B | | ||
| * -------- -------- ------------ | ||
| */ | ||
| enum { | ||
| IB_SIG_CHECK_GUARD = 0xc0, | ||
| IB_SIG_CHECK_APPTAG = 0x30, | ||
| IB_SIG_CHECK_REFTAG = 0x0f, | ||
| }; | ||
|
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| /* | ||
| * struct ib_sig_err - signature error descriptor | ||
| */ | ||
| struct ib_sig_err { | ||
| enum ib_sig_err_type err_type; | ||
| u32 expected; | ||
| u32 actual; | ||
| u64 sig_err_offset; | ||
| u32 key; | ||
| }; | ||
|
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| #endif /* _RDMA_SIGNATURE_H_ */ |