linux/include/rdma/signature.h

/* 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 { … };

enum ib_signature_guard_cap { … };

/**
 * enum ib_signature_type - Signature types
 * @IB_SIG_TYPE_NONE: Unprotected.
 * @IB_SIG_TYPE_T10_DIF: Type T10-DIF
 */
enum ib_signature_type { … };

/**
 * 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 { … };

/**
 * 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 { … };

/**
 * 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 { … };

/**
 * 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 { … };

enum ib_sig_err_type { … };

/*
 * Signature check masks (8 bytes in total) according to the T10-PI standard:
 *  -------- -------- ------------
 * | GUARD  | APPTAG |   REFTAG   |
 * |  2B    |  2B    |    4B      |
 *  -------- -------- ------------
 */
enum { … };

/*
 * struct ib_sig_err - signature error descriptor
 */
struct ib_sig_err { … };

#endif /* _RDMA_SIGNATURE_H_ */