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linux-headers-5.4.0-216
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rdma
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signature.h
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/* 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_ #include <linux/types.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, }; enum ib_signature_guard_cap { IB_GUARD_T10DIF_CRC = 1, IB_GUARD_T10DIF_CSUM = 1 << 1, }; /** * 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, }; /** * 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. * @meta_length: metadata length */ struct ib_sig_attrs { u8 check_mask; struct ib_sig_domain mem; struct ib_sig_domain wire; int meta_length; }; enum ib_sig_err_type { IB_SIG_BAD_GUARD, IB_SIG_BAD_REFTAG, IB_SIG_BAD_APPTAG, }; /* * 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, }; /* * 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; }; #endif /* _RDMA_SIGNATURE_H_ */