ocs_dif.h

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/*
 * Copyright (c) 2011-2015, Emulex
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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/**
 * @file
 *
 */

#if !defined(__OCS_DIF_H__)
#define __OCS_DIF_H__

typedef struct {
    uint16_t crc;
    uint16_t app_tag;
    uint32_t ref_tag;
} ocs_dif_t;

/* DIF support functions */
extern uint32_t ocs_scsi_dif_blocksize(ocs_scsi_dif_info_t *dif_info);
extern int32_t ocs_scsi_dif_set_blocksize(ocs_scsi_dif_info_t *dif_info, uint32_t blocksize);
extern int32_t ocs_scsi_dif_mem_blocksize(ocs_scsi_dif_info_t *dif_info, int wiretomem);
extern int32_t ocs_scsi_dif_wire_blocksize(ocs_scsi_dif_info_t *dif_info, int wiretomem);
extern uint32_t ocs_hal_dif_blocksize(ocs_hal_dif_info_t *dif_info);
extern int32_t ocs_hal_dif_mem_blocksize(ocs_hal_dif_info_t *dif_info, int wiretomem);
extern int32_t ocs_hal_dif_wire_blocksize(ocs_hal_dif_info_t *dif_info, int wiretomem);

/* DIF guard calculations */
extern uint16_t ocs_scsi_dif_calc_crc(const uint8_t *, uint32_t size, uint16_t crc);
extern uint16_t ocs_scsi_dif_calc_checksum(ocs_scsi_vaddr_len_t addrlen[], uint32_t addrlen_count);

#endif // __OCS_DIF_H__