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Linux kernel mirror (for testing)
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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 */
43void split_cdb_XX_6(
44 unsigned long long lba,
45 u32 sectors,
46 unsigned char *cdb)
47{
48 cdb[1] = (lba >> 16) & 0x1f;
49 cdb[2] = (lba >> 8) & 0xff;
50 cdb[3] = lba & 0xff;
51 cdb[4] = sectors & 0xff;
52}
53
54/* split_cdb_XX_10():
55 *
56 * 32-bit LBA w/ 16-bit SECTORS
57 */
58void split_cdb_XX_10(
59 unsigned long long lba,
60 u32 sectors,
61 unsigned char *cdb)
62{
63 put_unaligned_be32(lba, &cdb[2]);
64 put_unaligned_be16(sectors, &cdb[7]);
65}
66
67/* split_cdb_XX_12():
68 *
69 * 32-bit LBA w/ 32-bit SECTORS
70 */
71void split_cdb_XX_12(
72 unsigned long long lba,
73 u32 sectors,
74 unsigned char *cdb)
75{
76 put_unaligned_be32(lba, &cdb[2]);
77 put_unaligned_be32(sectors, &cdb[6]);
78}
79
80/* split_cdb_XX_16():
81 *
82 * 64-bit LBA w/ 32-bit SECTORS
83 */
84void split_cdb_XX_16(
85 unsigned long long lba,
86 u32 sectors,
87 unsigned char *cdb)
88{
89 put_unaligned_be64(lba, &cdb[2]);
90 put_unaligned_be32(sectors, &cdb[10]);
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 */
98void split_cdb_XX_32(
99 unsigned long long lba,
100 u32 sectors,
101 unsigned char *cdb)
102{
103 put_unaligned_be64(lba, &cdb[12]);
104 put_unaligned_be32(sectors, &cdb[28]);
105}