125 строки
2.9 KiB
C
125 строки
2.9 KiB
C
/* 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_ */
|