[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / target / target_core_scdb.c

/*******************************************************************************
 * Filename:  target_core_scdb.c
 *
 * This file contains the generic target engine Split CDB related functions.
 *
 * Copyright (c) 2004-2005 PyX Technologies, Inc.
 * Copyright (c) 2005, 2006, 2007 SBE, Inc.
 * Copyright (c) 2007-2010 Rising Tide Systems
 * Copyright (c) 2008-2010 Linux-iSCSI.org
 *
 * Nicholas A. Bellinger <nab@kernel.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 ******************************************************************************/

#include <linux/net.h>
#include <linux/string.h>
#include <scsi/scsi.h>
#include <asm/unaligned.h>

#include <target/target_core_base.h>
#include <target/target_core_transport.h>

#include "target_core_scdb.h"

/*	split_cdb_XX_6():
 *
 *      21-bit LBA w/ 8-bit SECTORS
 */
void split_cdb_XX_6(
	unsigned long long lba,
	u32 sectors,
	unsigned char *cdb)
{
	cdb[1] = (lba >> 16) & 0x1f;
	cdb[2] = (lba >> 8) & 0xff;
	cdb[3] = lba & 0xff;
	cdb[4] = sectors & 0xff;
}

/*	split_cdb_XX_10():
 *
 *	32-bit LBA w/ 16-bit SECTORS
 */
void split_cdb_XX_10(
	unsigned long long lba,
	u32 sectors,
	unsigned char *cdb)
{
	put_unaligned_be32(lba, &cdb[2]);
	put_unaligned_be16(sectors, &cdb[7]);
}

/*	split_cdb_XX_12():
 *
 *	32-bit LBA w/ 32-bit SECTORS
 */
void split_cdb_XX_12(
	unsigned long long lba,
	u32 sectors,
	unsigned char *cdb)
{
	put_unaligned_be32(lba, &cdb[2]);
	put_unaligned_be32(sectors, &cdb[6]);
}

/*	split_cdb_XX_16():
 *
 *	64-bit LBA w/ 32-bit SECTORS
 */
void split_cdb_XX_16(
	unsigned long long lba,
	u32 sectors,
	unsigned char *cdb)
{
	put_unaligned_be64(lba, &cdb[2]);
	put_unaligned_be32(sectors, &cdb[10]);
}

/*
 *	split_cdb_XX_32():
 *
 * 	64-bit LBA w/ 32-bit SECTORS such as READ_32, WRITE_32 and emulated XDWRITEREAD_32
 */
void split_cdb_XX_32(
	unsigned long long lba,
	u32 sectors,
	unsigned char *cdb)
{
	put_unaligned_be64(lba, &cdb[12]);
	put_unaligned_be32(sectors, &cdb[28]);
}
Commit	Line	Data
c66ac9db NB	1	/*******************************************************************************
	2	* Filename: target_core_scdb.c
	3	*
	4	* This file contains the generic target engine Split CDB related functions.
	5	*
	6	* Copyright (c) 2004-2005 PyX Technologies, Inc.
	7	* Copyright (c) 2005, 2006, 2007 SBE, Inc.
	8	* Copyright (c) 2007-2010 Rising Tide Systems
	9	* Copyright (c) 2008-2010 Linux-iSCSI.org
	10	*
	11	* Nicholas A. Bellinger <nab@kernel.org>
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software
	25	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	26	*
	27	******************************************************************************/
	28
	29	#include <linux/net.h>
	30	#include <linux/string.h>
	31	#include <scsi/scsi.h>
	32	#include <asm/unaligned.h>
	33
	34	#include <target/target_core_base.h>
	35	#include <target/target_core_transport.h>
	36
	37	#include "target_core_scdb.h"
	38
	39	/* split_cdb_XX_6():
	40	*
	41	* 21-bit LBA w/ 8-bit SECTORS
	42	*/
	43	void split_cdb_XX_6(
	44	unsigned long long lba,
3a867205	45	u32 sectors,
c66ac9db NB	46	unsigned char *cdb)
	47	{
	48	cdb[1] = (lba >> 16) & 0x1f;
	49	cdb[2] = (lba >> 8) & 0xff;
	50	cdb[3] = lba & 0xff;
3a867205	51	cdb[4] = sectors & 0xff;
c66ac9db NB	52	}
	53
	54	/* split_cdb_XX_10():
	55	*
	56	* 32-bit LBA w/ 16-bit SECTORS
	57	*/
	58	void split_cdb_XX_10(
	59	unsigned long long lba,
3a867205	60	u32 sectors,
c66ac9db NB	61	unsigned char *cdb)
	62	{
	63	put_unaligned_be32(lba, &cdb[2]);
3a867205	64	put_unaligned_be16(sectors, &cdb[7]);
c66ac9db NB	65	}
	66
	67	/* split_cdb_XX_12():
	68	*
	69	* 32-bit LBA w/ 32-bit SECTORS
	70	*/
	71	void split_cdb_XX_12(
	72	unsigned long long lba,
3a867205	73	u32 sectors,
c66ac9db NB	74	unsigned char *cdb)
	75	{
	76	put_unaligned_be32(lba, &cdb[2]);
3a867205	77	put_unaligned_be32(sectors, &cdb[6]);
c66ac9db NB	78	}
	79
	80	/* split_cdb_XX_16():
	81	*
	82	* 64-bit LBA w/ 32-bit SECTORS
	83	*/
	84	void split_cdb_XX_16(
	85	unsigned long long lba,
3a867205	86	u32 sectors,
c66ac9db NB	87	unsigned char *cdb)
	88	{
	89	put_unaligned_be64(lba, &cdb[2]);
3a867205	90	put_unaligned_be32(sectors, &cdb[10]);
c66ac9db NB	91	}
	92
	93	/*
	94	* split_cdb_XX_32():
	95	*
	96	* 64-bit LBA w/ 32-bit SECTORS such as READ_32, WRITE_32 and emulated XDWRITEREAD_32
	97	*/
	98	void split_cdb_XX_32(
	99	unsigned long long lba,
3a867205	100	u32 sectors,
c66ac9db NB	101	unsigned char *cdb)
	102	{
	103	put_unaligned_be64(lba, &cdb[12]);
3a867205	104	put_unaligned_be32(sectors, &cdb[28]);
c66ac9db	105	}