* [RFC PATCH 12/19] Target_Core_Mod READ/WRITE command descriptor block generation code
@ 2009-09-12 1:57 Nicholas A. Bellinger
0 siblings, 0 replies; 2+ messages in thread
From: Nicholas A. Bellinger @ 2009-09-12 1:57 UTC (permalink / raw)
To: LKML, linux-scsi
Cc: Andrew Morton, Greg KH, Douglas Gilbert, James Bottomley,
Hannes Reinecke, FUJITA Tomonori, Mike Christie, Joel Becker,
Martin K. Petersen, Christoph Hellwig, Linus Torvalds,
Alan Stern, Boaz Harrosh, Florian Haas, Philipp Reisner
[RFC PATCH 12/19] Target_Core_Mod READ/WRITE command descriptor block generation code
This patch adds support for the generation of READ_6, READ_10, READ_12, READ_16,
WRITE_6, WRITE_10, WRITE_12 and WRITE_16 command descriptor blocks when handling
incoming fabric module requests that exceed the max_sectors presented for a storage
object through struct se_subsystem_api_t.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_scdb.c b/drivers/target/target_core_scdb.c
new file mode 100644
index 0000000..ec111d9
--- /dev/null
+++ b/drivers/target/target_core_scdb.c
@@ -0,0 +1,154 @@
+/*******************************************************************************
+ * 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) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 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.
+ *
+ ******************************************************************************/
+
+
+#define TARGET_CORE_SCDB_C
+
+#include <linux/net.h>
+#include <linux/string.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_hba.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_scdb.h>
+
+#undef TARGET_CORE_SCDB_C
+
+/* 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;
+}
+
+void split_cdb_RW_6(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb,
+ int rw)
+{
+ cdb[0] = (rw) ? 0x0a : 0x08;
+ split_cdb_XX_6(lba, sectors, &cdb[0]);
+}
+
+/* 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)
+{
+ cdb[2] = (lba >> 24) & 0xff;
+ cdb[3] = (lba >> 16) & 0xff;
+ cdb[4] = (lba >> 8) & 0xff;
+ cdb[5] = lba & 0xff;
+ cdb[7] = (*sectors >> 8) & 0xff;
+ cdb[8] = *sectors & 0xff;
+}
+
+void split_cdb_RW_10(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb,
+ int rw)
+{
+ cdb[0] = (rw) ? 0x2a : 0x28;
+ split_cdb_XX_10(lba, sectors, &cdb[0]);
+}
+
+/* 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)
+{
+ cdb[2] = (lba >> 24) & 0xff;
+ cdb[3] = (lba >> 16) & 0xff;
+ cdb[4] = (lba >> 8) & 0xff;
+ cdb[5] = lba & 0xff;
+ cdb[6] = (*sectors >> 24) & 0xff;
+ cdb[7] = (*sectors >> 16) & 0xff;
+ cdb[8] = (*sectors >> 8) & 0xff;
+ cdb[9] = *sectors & 0xff;
+}
+
+void split_cdb_RW_12(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb,
+ int rw)
+{
+ cdb[0] = (rw) ? 0xaa : 0xa8;
+ split_cdb_XX_12(lba, sectors, &cdb[0]);
+}
+
+/* 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)
+{
+ cdb[2] = (lba >> 56) & 0xff;
+ cdb[3] = (lba >> 48) & 0xff;
+ cdb[4] = (lba >> 40) & 0xff;
+ cdb[5] = (lba >> 32) & 0xff;
+ cdb[6] = (lba >> 24) & 0xff;
+ cdb[7] = (lba >> 16) & 0xff;
+ cdb[8] = (lba >> 8) & 0xff;
+ cdb[9] = lba & 0xff;
+ cdb[10] = (*sectors >> 24) & 0xff;
+ cdb[11] = (*sectors >> 16) & 0xff;
+ cdb[12] = (*sectors >> 8) & 0xff;
+ cdb[13] = *sectors & 0xff;
+}
+
+void split_cdb_RW_16(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb,
+ int rw)
+{
+ cdb[0] = (rw) ? 0x8a : 0x88;
+ split_cdb_XX_16(lba, sectors, &cdb[0]);
+}
diff --git a/include/target/target_core_scdb.h b/include/target/target_core_scdb.h
new file mode 100644
index 0000000..1330bc3
--- /dev/null
+++ b/include/target/target_core_scdb.h
@@ -0,0 +1,42 @@
+/*******************************************************************************
+ * Filename: target_core_scdb.h
+ *
+ * This file contains the iSCSI Transport Split CDB related definitions.
+ *
+ * Copyright (c) 2004-2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 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.
+ *
+ ******************************************************************************/
+
+
+#ifndef TARGET_CORE_SCDB_H
+#define TARGET_CORE_SCDB_H
+
+extern void split_cdb_XX_6(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_RW_6(unsigned long long, u32 *, unsigned char *, int);
+extern void split_cdb_XX_10(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_RW_10(unsigned long long, u32 *, unsigned char *, int);
+extern void split_cdb_XX_12(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_RW_12(unsigned long long, u32 *, unsigned char *, int);
+extern void split_cdb_XX_16(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_RW_16(unsigned long long, u32 *, unsigned char *, int);
+
+#endif /* TARGET_CORE_SCDB_H */
^ permalink raw reply [flat|nested] 2+ messages in thread
* [RFC PATCH 12/19] Target_Core_Mod READ/WRITE command descriptor block generation code
@ 2009-09-18 22:08 Nicholas A. Bellinger
0 siblings, 0 replies; 2+ messages in thread
From: Nicholas A. Bellinger @ 2009-09-18 22:08 UTC (permalink / raw)
To: LKML, linux-scsi
Cc: Andrew Morton, Greg KH, Douglas Gilbert, James Bottomley,
Hannes Reinecke, FUJITA Tomonori, Mike Christie, Joel Becker,
Martin K. Petersen, Christoph Hellwig, Linus Torvalds,
Alan Stern, Boaz Harrosh, Florian Haas, Philipp Reisner,
Lars Ellenberg, Daniel Walker
[RFC PATCH 12/19] Target_Core_Mod READ/WRITE command descriptor block generation code
This patch adds support for the generation of READ_6, READ_10, READ_12, READ_16,
WRITE_6, WRITE_10, WRITE_12 and WRITE_16 command descriptor blocks when handling
incoming fabric module requests that exceed the max_sectors presented for a storage
object through struct se_subsystem_api_t.
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_scdb.c b/drivers/target/target_core_scdb.c
new file mode 100644
index 0000000..ec111d9
--- /dev/null
+++ b/drivers/target/target_core_scdb.c
@@ -0,0 +1,154 @@
+/*******************************************************************************
+ * 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) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 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.
+ *
+ ******************************************************************************/
+
+
+#define TARGET_CORE_SCDB_C
+
+#include <linux/net.h>
+#include <linux/string.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_hba.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_scdb.h>
+
+#undef TARGET_CORE_SCDB_C
+
+/* 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;
+}
+
+void split_cdb_RW_6(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb,
+ int rw)
+{
+ cdb[0] = (rw) ? 0x0a : 0x08;
+ split_cdb_XX_6(lba, sectors, &cdb[0]);
+}
+
+/* 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)
+{
+ cdb[2] = (lba >> 24) & 0xff;
+ cdb[3] = (lba >> 16) & 0xff;
+ cdb[4] = (lba >> 8) & 0xff;
+ cdb[5] = lba & 0xff;
+ cdb[7] = (*sectors >> 8) & 0xff;
+ cdb[8] = *sectors & 0xff;
+}
+
+void split_cdb_RW_10(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb,
+ int rw)
+{
+ cdb[0] = (rw) ? 0x2a : 0x28;
+ split_cdb_XX_10(lba, sectors, &cdb[0]);
+}
+
+/* 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)
+{
+ cdb[2] = (lba >> 24) & 0xff;
+ cdb[3] = (lba >> 16) & 0xff;
+ cdb[4] = (lba >> 8) & 0xff;
+ cdb[5] = lba & 0xff;
+ cdb[6] = (*sectors >> 24) & 0xff;
+ cdb[7] = (*sectors >> 16) & 0xff;
+ cdb[8] = (*sectors >> 8) & 0xff;
+ cdb[9] = *sectors & 0xff;
+}
+
+void split_cdb_RW_12(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb,
+ int rw)
+{
+ cdb[0] = (rw) ? 0xaa : 0xa8;
+ split_cdb_XX_12(lba, sectors, &cdb[0]);
+}
+
+/* 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)
+{
+ cdb[2] = (lba >> 56) & 0xff;
+ cdb[3] = (lba >> 48) & 0xff;
+ cdb[4] = (lba >> 40) & 0xff;
+ cdb[5] = (lba >> 32) & 0xff;
+ cdb[6] = (lba >> 24) & 0xff;
+ cdb[7] = (lba >> 16) & 0xff;
+ cdb[8] = (lba >> 8) & 0xff;
+ cdb[9] = lba & 0xff;
+ cdb[10] = (*sectors >> 24) & 0xff;
+ cdb[11] = (*sectors >> 16) & 0xff;
+ cdb[12] = (*sectors >> 8) & 0xff;
+ cdb[13] = *sectors & 0xff;
+}
+
+void split_cdb_RW_16(
+ unsigned long long lba,
+ u32 *sectors,
+ unsigned char *cdb,
+ int rw)
+{
+ cdb[0] = (rw) ? 0x8a : 0x88;
+ split_cdb_XX_16(lba, sectors, &cdb[0]);
+}
diff --git a/include/target/target_core_scdb.h b/include/target/target_core_scdb.h
new file mode 100644
index 0000000..1330bc3
--- /dev/null
+++ b/include/target/target_core_scdb.h
@@ -0,0 +1,42 @@
+/*******************************************************************************
+ * Filename: target_core_scdb.h
+ *
+ * This file contains the iSCSI Transport Split CDB related definitions.
+ *
+ * Copyright (c) 2004-2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 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.
+ *
+ ******************************************************************************/
+
+
+#ifndef TARGET_CORE_SCDB_H
+#define TARGET_CORE_SCDB_H
+
+extern void split_cdb_XX_6(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_RW_6(unsigned long long, u32 *, unsigned char *, int);
+extern void split_cdb_XX_10(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_RW_10(unsigned long long, u32 *, unsigned char *, int);
+extern void split_cdb_XX_12(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_RW_12(unsigned long long, u32 *, unsigned char *, int);
+extern void split_cdb_XX_16(unsigned long long, u32 *, unsigned char *);
+extern void split_cdb_RW_16(unsigned long long, u32 *, unsigned char *, int);
+
+#endif /* TARGET_CORE_SCDB_H */
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2009-09-18 22:15 UTC | newest]
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2009-09-12 1:57 [RFC PATCH 12/19] Target_Core_Mod READ/WRITE command descriptor block generation code Nicholas A. Bellinger
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