Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / target / target_core_scdb.c

diff --git a/drivers/target/target_core_scdb.c b/drivers/target/target_core_scdb.c
new file mode 100644 (file)
index 0000000..dc6fed0
--- /dev/null
+++ b/drivers/target/target_core_scdb.c
@@ -0,0 +1,105 @@
+/*******************************************************************************
+ * 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]);
+}