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/*******************************************************************************
* 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]);
}
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