/* $NetBSD: isp_stds.h,v 1.6 2021/12/12 09:00:07 andvar Exp $ */
/*-
 *  Copyright (c) 1997-2008 by Matthew Jacob
 *  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.
 * 
 *  THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 * 
 * 
 *  Matthew Jacob
 *  Feral Software
 *  421 Laurel Avenue
 *  Menlo Park, CA 94025
 *  USA
 * 
 *  gplbsd at feral com
 */
/*
 * Structures that derive directly from public standards.
 */
#ifndef _ISP_STDS_H
#define _ISP_STDS_H

/*
 * FC Frame Header
 *
 * Source: dpANS-X3.xxx-199x, section 18 (AKA FC-PH-2)
 *
 */
typedef struct {
        uint8_t         r_ctl;
        uint8_t         d_id[3];
        uint8_t         cs_ctl;
        uint8_t         s_id[3];
        uint8_t         type;
        uint8_t         f_ctl[3];
        uint8_t         seq_id;
        uint8_t         df_ctl;
        uint16_t        seq_cnt;
        uint16_t        ox_id;
        uint16_t        rx_id;
        uint32_t        parameter;
} fc_hdr_t;

/*
 * FCP_CMND_IU Payload
 *
 * Source: NICTS T10, Project 1144D, Revision 07a, Section 9 (AKA fcp2-r07a)
 *
 * Notes:
 *      When additional cdb length is defined in fcp_cmnd_alen_datadir,
 *      bits 2..7, the actual cdb length is 16 + ((fcp_cmnd_alen_datadir>>2)*4),
 *      with the datalength following in MSB format just after.
 */
typedef struct {
        uint8_t         fcp_cmnd_lun[8];
        uint8_t         fcp_cmnd_crn;
        uint8_t         fcp_cmnd_task_attribute;
        uint8_t         fcp_cmnd_task_management;
        uint8_t         fcp_cmnd_alen_datadir;
        union {
                struct {
                        uint8_t         fcp_cmnd_cdb[16];
                        uint32_t        fcp_cmnd_dl;
                } sf;
                struct {
                        uint8_t         fcp_cmnd_cdb[1];
                } lf;
        } cdb_dl;
} fcp_cmnd_iu_t;


#define FCP_CMND_TASK_ATTR_SIMPLE       0x00
#define FCP_CMND_TASK_ATTR_HEAD         0x01
#define FCP_CMND_TASK_ATTR_ORDERED      0x02
#define FCP_CMND_TASK_ATTR_ACA          0x04
#define FCP_CMND_TASK_ATTR_UNTAGGED     0x05
#define FCP_CMND_TASK_ATTR_MASK         0x07

#define FCP_CMND_ADDTL_CDBLEN_SHIFT     2

#define FCP_CMND_DATA_WRITE             0x01
#define FCP_CMND_DATA_READ              0x02

#define FCP_CMND_DATA_DIR_MASK          0x03

#define FCP_CMND_TMF_CLEAR_ACA          0x40
#define FCP_CMND_TMF_TGT_RESET          0x20
#define FCP_CMND_TMF_LUN_RESET          0x10
#define FCP_CMND_TMF_CLEAR_TASK_SET     0x04
#define FCP_CMND_TMF_ABORT_TASK_SET     0x02

/*
 * Basic CT IU Header
 *
 * Source: X3.288-199x Generic Services 2 Rev 5.3 (FC-GS-2) Section 4.3.1
 */

typedef struct {
        uint8_t         ct_revision;
        uint8_t         ct_in_id[3];
        uint8_t         ct_fcs_type;
        uint8_t         ct_fcs_subtype;
        uint8_t         ct_options;
        uint8_t         ct_reserved0;
        uint16_t        ct_cmd_resp;
        uint16_t        ct_bcnt_resid;
        uint8_t         ct_reserved1;
        uint8_t         ct_reason;
        uint8_t         ct_explanation;
        uint8_t         ct_vunique;
} ct_hdr_t;
#define CT_REVISION             1
#define CT_FC_TYPE_FC           0xFC
#define CT_FC_SUBTYPE_NS        0x02

/*
 * RFT_ID Request CT_IU
 *
 * Source: NCITS xxx-200x Generic Services- 5 Rev 8.5 Section 5.2.5.30
 */
typedef struct {
        ct_hdr_t        rftid_hdr;
        uint8_t         rftid_reserved;
        uint8_t         rftid_portid[3];
        uint32_t        rftid_fc4types[8];
} rft_id_t;

/*
 * FCP Response IU Bits of interest
 * Source: NCITS T10, Project 1144D, Revision 08 (aka FCP2r08)
 */
#define FCP_CONF_REQ                    0x10
#define FCP_RESID_UNDERFLOW             0x08
#define FCP_RESID_OVERFLOW              0x04
#define FCP_SNSLEN_VALID                0x02
#define FCP_RSPLEN_VALID                0x01

#define FCP_MAX_RSPLEN                  0x08
/*
 * FCP Response Code Definitions
 * Source: NCITS T10, Project 1144D, Revision 08 (aka FCP2r08)
 */
#define FCP_RSPNS_CODE_OFFSET           3

#define FCP_RSPNS_TMF_DONE              0
#define FCP_RSPNS_DLBRSTX               1
#define FCP_RSPNS_BADCMND               2
#define FCP_RSPNS_EROFS                 3
#define FCP_RSPNS_TMF_REJECT            4
#define FCP_RSPNS_TMF_FAILED            5
#define FCP_RSPNS_TMF_SUCCEEDED         8
#define FCP_RSPNS_TMF_INCORRECT_LUN     9


/* unconverted miscellany */
/*
 * Basic FC Link Service defines
 */
/*
 * These are in the R_CTL field.
 */
#define ABTS                    0x81
#define BA_ACC                  0x84    /* of ABORT SEQUENCE */
#define BA_RJT                  0x85    /* of ABORT SEQUENCE */

/*
 * Link Service Accept/Reject
 */
#define LS_ACC                  0x8002
#define LS_RJT                  0x8001

/*
 * FC ELS Codes- bits 31-24 of the first payload word of an ELS frame.
 */
#define PLOGI                   0x03
#define FLOGI                   0x04
#define LOGO                    0x05
#define ABTX                    0x06
#define PRLI                    0x20
#define PRLO                    0x21
#define SCN                     0x22
#define TPRLO                   0x24
#define PDISC                   0x50
#define ADISC                   0x52
#define RNC                     0x53

/*
 * FC4 defines
 */
#define FC4_IP          5       /* ISO/EEC 8802-2 LLC/SNAP */
#define FC4_SCSI        8       /* SCSI-3 via Fibre Channel Protocol (FCP) */
#define FC4_FC_SVC      0x20    /* Fibre Channel Services */

#ifndef MSG_ABORT
#define MSG_ABORT               0x06
#endif
#ifndef MSG_BUS_DEV_RESET
#define MSG_BUS_DEV_RESET       0x0c
#endif
#ifndef MSG_ABORT_TAG
#define MSG_ABORT_TAG           0x0d
#endif
#ifndef MSG_CLEAR_QUEUE
#define MSG_CLEAR_QUEUE         0x0e
#endif
#ifndef MSG_REL_RECOVERY
#define MSG_REL_RECOVERY        0x10
#endif
#ifndef MSG_TERM_IO_PROC
#define MSG_TERM_IO_PROC        0x11
#endif
#ifndef MSG_LUN_RESET
#define MSG_LUN_RESET           0x17
#endif

#endif  /* _ISP_STDS_H */