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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1996,2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _SYS_SCSI_GENERIC_MESSAGE_H
#define _SYS_SCSI_GENERIC_MESSAGE_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Defined Messages For Parallel SCSI.
*/
/*
* The SCSI specification defines message codes 0x00, 0x02-0x1F,
* as fixed single byte messages, 0x01 as indicating extended (multi-byte)
* messages, 0x20-0x2F as fixed two byte messages, and 0x80-0xFF
* as IDENTIFY messages.
*/
#define MSG_COMMAND_COMPLETE 0x00
#define MSG_SAVE_DATA_PTR 0x02
#define MSG_RESTORE_PTRS 0x03
#define MSG_DISCONNECT 0x04
#define MSG_INITIATOR_ERROR 0x05
#define MSG_ABORT 0x06
#define MSG_REJECT 0x07
#define MSG_NOP 0x08
#define MSG_MSG_PARITY 0x09
#define MSG_LINK_CMPLT 0x0A
#define MSG_LINK_CMPLT_FLAG 0x0B
#define MSG_DEVICE_RESET 0x0C
#define MSG_ABORT_TAG 0x0D
#define MSG_CLEAR_QUEUE 0x0E
#define MSG_INITIATE_RECOVERY 0x0F
#define MSG_RELEASE_RECOVERY 0x10
#define MSG_TERMINATE_PROCESS 0x11
#define MSG_CONTINUE_TASK 0x12
#define MSG_TARGET_TRAN_DIS 0x13
#define MSG_CLEAR_ACA 0x16
/*
* Message code 0x01 indicates an extended
* (two or more) byte message. The EXTENDED
* message byte is followed immediately by
* a message length byte and then an extended
* message code byte.
*
* Note: The EXTENDED IDENTIFY message is pre-SCSI-2.
*/
#define MSG_EXTENDED 0x01
#define MSG_MODIFY_DATA_PTR 0x00
#define MSG_SYNCHRONOUS 0x01
#define MSG_IDENTIFY_EXTENDED 0x02
#define MSG_WIDE_DATA_XFER 0x03
#define MSG_PARALLEL_PROTOCOL 0x04
/*
* parallel protocol message optional flags
*/
#define OPT_IU 0x01
#define OPT_DT 0x02
#define OPT_QAS_REQ 0x04
/*
* Message codes 0x20-0x2F are fixed two byte messages.
*/
#define MSG_SIMPLE_QTAG 0x20
#define MSG_HEAD_QTAG 0x21
#define MSG_ORDERED_QTAG 0x22
#define MSG_IGNORE_WIDE_RESID 0x23
#define MSG_ACA 0x24
#define MSG_LUN_RESET 0x25
/*
* Codes 0x80-0xFF are identify messages, indicated
* by the setting of the most significant bit in the
* message (0x80).
*/
#define MSG_IDENTIFY 0x80
/*
* Initiators will set bit 6 in an Identify message
* to indicate whether or not they can accommodate
* disconnect/reconnect
*/
#define INI_CAN_DISCON 0x40
/*
* ..so we can have a compound definition
* for Initiators that can accommodate
* disconnect/reconnect
*/
#define MSG_DR_IDENTIFY (MSG_IDENTIFY|INI_CAN_DISCON)
/*
* Note: Following is ONLY applicable to pre-SCSI-3.
*
* Bit 5 of the identify message specifies that, if zero,
* that the IDENTIFY message is directed to a logical unit,
* and if one, that the IDENTIFY message is directed to a
* target routine that does not involve a logical unit.
*/
#define MSG_LUNTAR 0x20
/*
* Note: Following is ONLY applicable to pre-SCSI-3.
*
* Bits 2-0 identify either the logical unit or the target
* routine number based upon whether MSG_LUNTAR is clear
* or set.
*/
#define MSG_LUNRTN 0x07
/*
* Note: Following is ONLY applicable to pre-SCSI-3.
*
* Bits 4-3 are reserved and must be zero.
*/
#define BAD_IDENTIFY 0x18
/*
* These macros may be useful to quickly determine the
* length of a message based upon the message code.
*/
/*
* Note: IS_IDENTIFY_MSG is ONLY applicable to pre-SCSI-3.
* For SCSI-3, use IS_IDENTIFY_MSG_SCSI3.
*/
#define IS_IDENTIFY_MSG(msg) \
(((msg) & MSG_IDENTIFY) && !((msg) & BAD_IDENTIFY))
#define IS_IDENTIFY_MSG_SCSI3(msg) ((msg) & MSG_IDENTIFY)
#define IS_EXTENDED_MSG(msg) ((msg) == MSG_EXTENDED)
#define IS_2BYTE_MSG(msg) (((msg) & 0xF0) == 0x20)
#define IS_1BYTE_MSG(msg) (!(IS_EXTENDED_MSG((msg))) && \
((((msg) & 0xF0) == 0) || IS_IDENTIFY_MSG((msg))))
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SCSI_GENERIC_MESSAGE_H */
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