mpt3sas: Single driver module which supports both SAS 2.0 & SAS 3.0 HBAs

Modified the mpt3sas driver to have a single driver module which
supports both SAS 2.0 & SAS 3.0 HBA devices.

* Added SAS 2.0 HBA device IDs to the mpt3sas_pci_table pci table.

* Created two separate SCSI host templates for SAS2 and SAS3 HBAs so
  that, during the driver load time driver can use corresponding host
  template(based the pci device ID) while registering a scsi host
  adapter instance for that pci device.

* Registered two IOCTL devices, mpt2ctl is for SAS2 HBAs & mpt3ctl for
  SAS3 HBAs. Also updated the code to make sure that mpt2ctl device
  processes only those ioctl cmds issued for the SAS2 HBAs and mpt3ctl
  device processes only those ioctl cmds issued for the SAS3 HBAs.

* Added separate indexing for SAS2 and SAS3 HBAs.

* Replaced compile time check 'MPT2SAS_SCSI' to run time check
  'hba_mpi_version_belonged' whereever needed.

* Aliased this merged driver to mpt2sas using MODULE_ALIAS.

* Moved global varaible 'driver_name' to per adapter instance variable.

* Created two raid function template and used corresponding raid
  function templates based on the run time check
  'hba_mpi_version_belonged'.

* Moved mpt2sas_warpdrive.c file from mpt2sas to mpt3sas folder and
  renamed it as mpt3sas_warpdrive.c.

* Also renamed the functions in mpt3sas_warpdrive.c file to follow
  current driver function name convention.

* Updated the Makefile to build mpt3sas_warpdrive.o file for these
  WarpDrive-specific functions.

* Also in function mpt3sas_setup_direct_io(), used sector_div() API
  instead of division operator (which gives compilation errors on 32 bit
  machines).

* Removed mpt2sas files, mpt2sas directory & mpt3sas_module.c file.

* Added module parameter 'hbas_to_enumerate' which permits using this
  merged driver as a legacy mpt2sas driver or as a legacy mpt3sas
  driver.

  Here are the available options for this module parameter:

   0 - Merged driver which enumerates both SAS 2.0 & SAS 3.0 HBAs
   1 - Acts as legacy mpt2sas driver, which enumerates only SAS 2.0 HBAs
   2 - Acts as legacy mpt3sas driver, which enumerates only SAS 3.0 HBAs

* Removed mpt2sas entries from SCSI's Kconfig and Makefile files.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

14 files changed, 566 insertions, 826 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 95f7a76cfafc..8aed855dd391 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -541,7 +541,6 @@ config SCSI_ARCMSR
 
 source "drivers/scsi/esas2r/Kconfig"
 source "drivers/scsi/megaraid/Kconfig.megaraid"
-source "drivers/scsi/mpt2sas/Kconfig"
 source "drivers/scsi/mpt3sas/Kconfig"
 source "drivers/scsi/ufs/Kconfig"
 
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 1a8c9b53fafa..c14bca4a9675 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -106,7 +106,6 @@ obj-$(CONFIG_CXLFLASH)		+= cxlflash/
 obj-$(CONFIG_MEGARAID_LEGACY)	+= megaraid.o
 obj-$(CONFIG_MEGARAID_NEWGEN)	+= megaraid/
 obj-$(CONFIG_MEGARAID_SAS)	+= megaraid/
-obj-$(CONFIG_SCSI_MPT2SAS)	+= mpt2sas/
 obj-$(CONFIG_SCSI_MPT3SAS)	+= mpt3sas/
 obj-$(CONFIG_SCSI_UFSHCD)	+= ufs/
 obj-$(CONFIG_SCSI_ACARD)	+= atp870u.o
diff --git a/drivers/scsi/mpt2sas/Kconfig b/drivers/scsi/mpt2sas/Kconfig
deleted file mode 100644
index 1356a0aa5d14..000000000000
--- a/drivers/scsi/mpt2sas/Kconfig
+++ /dev/null
@@ -1,61 +0,0 @@
-#
-# Kernel configuration file for the MPT2SAS
-#
-# This code is based on drivers/scsi/mpt2sas/Kconfig
-# Copyright (C) 2007-2014  LSI Corporation
-#  (mailto:DL-MPTFusionLinux@lsi.com)
-
-# 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.
-
-# NO WARRANTY
-# THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
-# CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
-# LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
-# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
-# solely responsible for determining the appropriateness of using and
-# distributing the Program and assumes all risks associated with its
-# exercise of rights under this Agreement, including but not limited to
-# the risks and costs of program errors, damage to or loss of data,
-# programs or equipment, and unavailability or interruption of operations.
-
-# DISCLAIMER OF LIABILITY
-# NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
-# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
-# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
-# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
-# USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
-# HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
-
-# 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
-# USA.
-
-config SCSI_MPT2SAS
-	tristate "LSI MPT Fusion SAS 2.0 Device Driver"
-	depends on PCI && SCSI
-	select SCSI_SAS_ATTRS
-	select RAID_ATTRS
-	---help---
-	This driver supports PCI-Express SAS 6Gb/s Host Adapters.
-
-config SCSI_MPT2SAS_MAX_SGE
-	int "LSI MPT Fusion Max number of SG Entries (16 - 128)"
-	depends on PCI && SCSI && SCSI_MPT2SAS
-	default "128"
-	range 16 128
-	---help---
-	This option allows you to specify the maximum number of scatter-
-	gather entries per I/O. The driver default is 128, which matches
-	SAFE_PHYS_SEGMENTS.  However, it may decreased down to 16.
-	Decreasing this parameter will reduce memory requirements
-	on a per controller instance.
diff --git a/drivers/scsi/mpt2sas/Makefile b/drivers/scsi/mpt2sas/Makefile
deleted file mode 100644
index 37716169b91a..000000000000
--- a/drivers/scsi/mpt2sas/Makefile
+++ /dev/null
@@ -1,15 +0,0 @@
-# mpt2sas makefile
-
-# share the official mpi headers from the mpt3sas driver
-ccflags-y += -I$(src)/../mpt3sas
-ccflags-y += -DSCSI_MPT2SAS
-
-# use the common object files from mpt3sas driver
-obj-$(CONFIG_SCSI_MPT2SAS) += mpt2sas.o
-mpt2sas-y +=  ../mpt3sas/mpt3sas_base.o        \
-		../mpt3sas/mpt3sas_config.o    \
-		../mpt3sas/mpt3sas_scsih.o     \
-		../mpt3sas/mpt3sas_transport.o \
-		../mpt3sas/mpt3sas_ctl.o       \
-		../mpt3sas/mpt3sas_trigger_diag.o  \
-		mpt2sas_module.o
diff --git a/drivers/scsi/mpt2sas/mpt2sas_module.c b/drivers/scsi/mpt2sas/mpt2sas_module.c
deleted file mode 100644
index d407ed04315d..000000000000
--- a/drivers/scsi/mpt2sas/mpt2sas_module.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * Scsi Host Layer for MPT (Message Passing Technology) based controllers
- *
- * Copyright (C) 2012-2014  LSI Corporation
- * Copyright (C) 2013-2015 Avago Technologies
- *  (mailto: MPT-FusionLinux.pdl@avagotech.com)
- *
- * 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.
- *
- * NO WARRANTY
- * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
- * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
- * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
- * solely responsible for determining the appropriateness of using and
- * distributing the Program and assumes all risks associated with its
- * exercise of rights under this Agreement, including but not limited to
- * the risks and costs of program errors, damage to or loss of data,
- * programs or equipment, and unavailability or interruption of operations.
-
- * DISCLAIMER OF LIABILITY
- * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
- * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
-
- * You should have received a copy of the GNU General Public License
- * along with this program.
- */
-
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/raid_class.h>
-
-#include "mpt3sas_base.h"
-#include "mpt3sas_ctl.h"
-
-MODULE_AUTHOR(MPT3SAS_AUTHOR);
-MODULE_DESCRIPTION(MPT2SAS_DESCRIPTION);
-MODULE_LICENSE("GPL");
-MODULE_VERSION(MPT2SAS_DRIVER_VERSION);
-
-/* shost template */
-static struct scsi_host_template mpt2sas_driver_template = {
-	.module				= THIS_MODULE,
-	.name				= "Fusion MPT SAS Host",
-	.proc_name			= MPT2SAS_DRIVER_NAME,
-	.queuecommand			= scsih_qcmd,
-	.target_alloc			= scsih_target_alloc,
-	.slave_alloc			= scsih_slave_alloc,
-	.slave_configure		= scsih_slave_configure,
-	.target_destroy			= scsih_target_destroy,
-	.slave_destroy			= scsih_slave_destroy,
-	.scan_finished			= scsih_scan_finished,
-	.scan_start			= scsih_scan_start,
-	.change_queue_depth		= scsih_change_queue_depth,
-	.eh_abort_handler		= scsih_abort,
-	.eh_device_reset_handler	= scsih_dev_reset,
-	.eh_target_reset_handler	= scsih_target_reset,
-	.eh_host_reset_handler		= scsih_host_reset,
-	.bios_param			= scsih_bios_param,
-	.can_queue			= 1,
-	.this_id			= -1,
-	.sg_tablesize			= MPT2SAS_SG_DEPTH,
-	.max_sectors			= 32767,
-	.cmd_per_lun			= 7,
-	.use_clustering			= ENABLE_CLUSTERING,
-	.shost_attrs			= mpt3sas_host_attrs,
-	.sdev_attrs			= mpt3sas_dev_attrs,
-	.track_queue_depth		= 1,
-};
-
-/* raid transport support */
-static struct raid_function_template mpt2sas_raid_functions = {
-	.cookie		= &mpt2sas_driver_template,
-	.is_raid	= scsih_is_raid,
-	.get_resync	= scsih_get_resync,
-	.get_state	= scsih_get_state,
-};
-
-/*
- * The pci device ids are defined in mpi/mpi2_cnfg.h.
- */
-static const struct pci_device_id mpt2sas_pci_table[] = {
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2004,
-		PCI_ANY_ID, PCI_ANY_ID },
-	/* Falcon ~ 2008*/
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2008,
-		PCI_ANY_ID, PCI_ANY_ID },
-	/* Liberator ~ 2108 */
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_1,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_2,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_3,
-		PCI_ANY_ID, PCI_ANY_ID },
-	/* Meteor ~ 2116 */
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_1,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_2,
-		PCI_ANY_ID, PCI_ANY_ID },
-	/* Thunderbolt ~ 2208 */
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_1,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_2,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_3,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_4,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_5,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_6,
-		PCI_ANY_ID, PCI_ANY_ID },
-	/* Mustang ~ 2308 */
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2308_1,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2308_2,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2308_3,
-		PCI_ANY_ID, PCI_ANY_ID },
-	/* SSS6200 */
-	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SSS6200,
-		PCI_ANY_ID, PCI_ANY_ID },
-	{0}	/* Terminating entry */
-};
-MODULE_DEVICE_TABLE(pci, mpt2sas_pci_table);
-
-static const struct file_operations mpt2sas_ctl_fops = {
-	.owner = THIS_MODULE,
-	.unlocked_ioctl = ctl_ioctl,
-	.poll = ctl_poll,
-	.fasync = ctl_fasync,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl = ctl_ioctl_compat,
-#endif
-	.llseek = noop_llseek,
-};
-
-static struct miscdevice mpt2sas_ctl_dev = {
-	.minor  = MPT2SAS_MINOR,
-	.name   = MPT2SAS_DEV_NAME,
-	.fops   = &mpt2sas_ctl_fops,
-};
-
-/**
- * mpt2sas_ctl_init - main entry point for ctl.
- *
- */
-void
-mpt2sas_ctl_init(void)
-{
-	ctl_init();
-	if (misc_register(&mpt2sas_ctl_dev) < 0)
-		pr_err("%s can't register misc device [minor=%d]\n",
-		    MPT2SAS_DRIVER_NAME, MPT2SAS_MINOR);
-}
-
-/**
- * mpt2sas_ctl_exit - exit point for ctl
- *
- */
-void
-mpt2sas_ctl_exit(void)
-{
-	ctl_exit();
-	misc_deregister(&mpt2sas_ctl_dev);
-}
-
-/**
- * _mpt2sas_probe - attach and add scsi host
- * @pdev: PCI device struct
- * @id: pci device id
- *
- * Returns 0 success, anything else error.
- */
-static int
-_mpt2sas_probe(struct pci_dev *pdev, const struct pci_device_id *id)
-{
-	struct Scsi_Host *shost;
-	int rv;
-
-	shost = scsi_host_alloc(&mpt2sas_driver_template,
-			    sizeof(struct MPT3SAS_ADAPTER));
-	if (!shost)
-		return -ENODEV;
-
-	sprintf(driver_name, "%s", MPT2SAS_DRIVER_NAME);
-	rv = scsih_probe(pdev, shost);
-	return rv;
-}
-
-static struct pci_error_handlers _mpt2sas_err_handler = {
-	.error_detected = scsih_pci_error_detected,
-	.mmio_enabled = scsih_pci_mmio_enabled,
-	.slot_reset =   scsih_pci_slot_reset,
-	.resume =       scsih_pci_resume,
-};
-
-static struct pci_driver mpt2sas_driver = {
-	.name		= MPT2SAS_DRIVER_NAME,
-	.id_table	= mpt2sas_pci_table,
-	.probe		= _mpt2sas_probe,
-	.remove		= scsih_remove,
-	.shutdown	= scsih_shutdown,
-	.err_handler	= &_mpt2sas_err_handler,
-#ifdef CONFIG_PM
-	.suspend	= scsih_suspend,
-	.resume		= scsih_resume,
-#endif
-};
-
-/**
- * _mpt2sas_init - main entry point for this driver.
- *
- * Returns 0 success, anything else error.
- */
-static int __init
-_mpt2sas_init(void)
-{
-	int error;
-
-	pr_info("%s version %s loaded\n", MPT2SAS_DRIVER_NAME,
-					MPT2SAS_DRIVER_VERSION);
-
-	mpt3sas_transport_template =
-	    sas_attach_transport(&mpt3sas_transport_functions);
-	if (!mpt3sas_transport_template)
-		return -ENODEV;
-
-	mpt3sas_raid_template = raid_class_attach(&mpt2sas_raid_functions);
-	if (!mpt3sas_raid_template) {
-		sas_release_transport(mpt3sas_transport_template);
-		return -ENODEV;
-	}
-
-	error = scsih_init();
-	if (error) {
-		scsih_exit();
-		return error;
-	}
-
-	mpt2sas_ctl_init();
-
-	error = pci_register_driver(&mpt2sas_driver);
-	if (error)
-		scsih_exit();
-
-	return error;
-}
-
-/**
- * _mpt2sas_exit - exit point for this driver (when it is a module).
- *
- */
-static void __exit
-_mpt2sas_exit(void)
-{
-	pr_info("mpt2sas version %s unloading\n",
-				MPT2SAS_DRIVER_VERSION);
-
-	pci_unregister_driver(&mpt2sas_driver);
-
-	mpt2sas_ctl_exit();
-
-	scsih_exit();
-}
-
-module_init(_mpt2sas_init);
-module_exit(_mpt2sas_exit);
diff --git a/drivers/scsi/mpt3sas/Kconfig b/drivers/scsi/mpt3sas/Kconfig
index 18b64bce10cb..29061467cc17 100644
--- a/drivers/scsi/mpt3sas/Kconfig
+++ b/drivers/scsi/mpt3sas/Kconfig
@@ -41,15 +41,27 @@
 # USA.
 
 config SCSI_MPT3SAS
-	tristate "LSI MPT Fusion SAS 3.0 Device Driver"
+	tristate "LSI MPT Fusion SAS 3.0 & SAS 2.0 Device Driver"
 	depends on PCI && SCSI
 	select SCSI_SAS_ATTRS
 	select RAID_ATTRS
 	---help---
 	This driver supports PCI-Express SAS 12Gb/s Host Adapters.
 
+config SCSI_MPT2SAS_MAX_SGE
+	int "LSI MPT Fusion SAS 2.0 Max number of SG Entries (16 - 256)"
+	depends on PCI && SCSI && SCSI_MPT3SAS
+	default "128"
+	range 16 256
+	---help---
+	This option allows you to specify the maximum number of scatter-
+	gather entries per I/O. The driver default is 128, which matches
+	MAX_PHYS_SEGMENTS in most kernels.  However in SuSE kernels this
+	can be 256. However, it may decreased down to 16.  Decreasing this
+	parameter will reduce memory requirements on a per controller instance.
+
 config SCSI_MPT3SAS_MAX_SGE
-	int "LSI MPT Fusion Max number of SG Entries (16 - 256)"
+	int "LSI MPT Fusion SAS 3.0 Max number of SG Entries (16 - 256)"
 	depends on PCI && SCSI && SCSI_MPT3SAS
 	default "128"
 	range 16 256
diff --git a/drivers/scsi/mpt3sas/Makefile b/drivers/scsi/mpt3sas/Makefile
index 188057f69a92..b7643f596c1e 100644
--- a/drivers/scsi/mpt3sas/Makefile
+++ b/drivers/scsi/mpt3sas/Makefile
@@ -6,4 +6,4 @@ mpt3sas-y +=  mpt3sas_base.o     \
 		mpt3sas_transport.o     \
 		mpt3sas_ctl.o	\
 		mpt3sas_trigger_diag.o \
-		mpt3sas_module.o
+		mpt3sas_warpdrive.o
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index f5d589e839b3..11393ebf1a68 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -198,7 +198,7 @@ _base_fault_reset_work(struct work_struct *work)
 		ioc->remove_host = 1;
 		/*Remove the Dead Host */
 		p = kthread_run(mpt3sas_remove_dead_ioc_func, ioc,
-		    "mpt3sas_dead_ioc_%d", ioc->id);
+		    "%s_dead_ioc_%d", ioc->driver_name, ioc->id);
 		if (IS_ERR(p))
 			pr_err(MPT3SAS_FMT
 			"%s: Running mpt3sas_dead_ioc thread failed !!!!\n",
@@ -254,7 +254,8 @@ mpt3sas_base_start_watchdog(struct MPT3SAS_ADAPTER *ioc)
 
 	INIT_DELAYED_WORK(&ioc->fault_reset_work, _base_fault_reset_work);
 	snprintf(ioc->fault_reset_work_q_name,
-	    sizeof(ioc->fault_reset_work_q_name), "poll_%d_status", ioc->id);
+	    sizeof(ioc->fault_reset_work_q_name), "poll_%s%d_status",
+	    ioc->driver_name, ioc->id);
 	ioc->fault_reset_work_q =
 		create_singlethread_workqueue(ioc->fault_reset_work_q_name);
 	if (!ioc->fault_reset_work_q) {
@@ -1835,10 +1836,10 @@ _base_request_irq(struct MPT3SAS_ADAPTER *ioc, u8 index, u32 vector)
 	atomic_set(&reply_q->busy, 0);
 	if (ioc->msix_enable)
 		snprintf(reply_q->name, MPT_NAME_LENGTH, "%s%d-msix%d",
-		    driver_name, ioc->id, index);
+		    ioc->driver_name, ioc->id, index);
 	else
 		snprintf(reply_q->name, MPT_NAME_LENGTH, "%s%d",
-		    driver_name, ioc->id);
+		    ioc->driver_name, ioc->id);
 	r = request_irq(vector, _base_interrupt, IRQF_SHARED, reply_q->name,
 	    reply_q);
 	if (r) {
@@ -2064,7 +2065,7 @@ mpt3sas_base_map_resources(struct MPT3SAS_ADAPTER *ioc)
 
 
 	if (pci_request_selected_regions(pdev, ioc->bars,
-	    driver_name)) {
+	    ioc->driver_name)) {
 		pr_warn(MPT3SAS_FMT "pci_request_selected_regions: failed\n",
 			ioc->name);
 		ioc->bars = 0;
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
index 213d7f8fe3dc..25c141c9ec9d 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -935,6 +935,7 @@ struct MPT3SAS_ADAPTER {
 	u8		id;
 	int		cpu_count;
 	char		name[MPT_NAME_LENGTH];
+	char		driver_name[MPT_NAME_LENGTH];
 	char		tmp_string[MPT_STRING_LENGTH];
 	struct pci_dev	*pdev;
 	Mpi2SystemInterfaceRegs_t __iomem *chip;
@@ -1246,7 +1247,6 @@ int mpt3sas_port_enable(struct MPT3SAS_ADAPTER *ioc);
 
 
 /* scsih shared API */
-extern struct raid_template *mpt3sas_raid_template;
 u8 mpt3sas_scsih_event_callback(struct MPT3SAS_ADAPTER *ioc, u8 msix_index,
 	u32 reply);
 void mpt3sas_scsih_reset_handler(struct MPT3SAS_ADAPTER *ioc, int reset_phase);
@@ -1270,39 +1270,8 @@ struct _sas_device *__mpt3sas_get_sdev_by_addr(
 	 struct MPT3SAS_ADAPTER *ioc, u64 sas_address);
 
 void mpt3sas_port_enable_complete(struct MPT3SAS_ADAPTER *ioc);
-
-void scsih_exit(void);
-int scsih_init(void);
-int scsih_probe(struct pci_dev *pdev, struct Scsi_Host *shost);
-void scsih_remove(struct pci_dev *pdev);
-void scsih_shutdown(struct pci_dev *pdev);
-pci_ers_result_t scsih_pci_error_detected(struct pci_dev *pdev,
-	pci_channel_state_t state);
-pci_ers_result_t scsih_pci_mmio_enabled(struct pci_dev *pdev);
-pci_ers_result_t scsih_pci_slot_reset(struct pci_dev *pdev);
-void scsih_pci_resume(struct pci_dev *pdev);
-int scsih_suspend(struct pci_dev *pdev, pm_message_t state);
-int scsih_resume(struct pci_dev *pdev);
-
-int scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd);
-int scsih_target_alloc(struct scsi_target *starget);
-int scsih_slave_alloc(struct scsi_device *sdev);
-int scsih_slave_configure(struct scsi_device *sdev);
-void scsih_target_destroy(struct scsi_target *starget);
-void scsih_slave_destroy(struct scsi_device *sdev);
-int scsih_scan_finished(struct Scsi_Host *shost, unsigned long time);
-void scsih_scan_start(struct Scsi_Host *shost);
-int scsih_change_queue_depth(struct scsi_device *sdev, int qdepth);
-int scsih_abort(struct scsi_cmnd *scmd);
-int scsih_dev_reset(struct scsi_cmnd *scmd);
-int scsih_target_reset(struct scsi_cmnd *scmd);
-int scsih_host_reset(struct scsi_cmnd *scmd);
-int scsih_bios_param(struct scsi_device *sdev, struct block_device *bdev,
-	sector_t capacity, int params[]);
-
-int scsih_is_raid(struct device *dev);
-void scsih_get_resync(struct device *dev);
-void scsih_get_state(struct device *dev);
+struct _raid_device *
+mpt3sas_raid_device_find_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle);
 
 /* config shared API */
 u8 mpt3sas_config_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
@@ -1342,10 +1311,8 @@ int mpt3sas_config_get_sas_iounit_pg0(struct MPT3SAS_ADAPTER *ioc,
 	u16 sz);
 int mpt3sas_config_get_iounit_pg1(struct MPT3SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 	*mpi_reply, Mpi2IOUnitPage1_t *config_page);
-#ifdef SCSI_MPT2SAS
 int mpt3sas_config_get_iounit_pg3(struct MPT3SAS_ADAPTER *ioc,
 	Mpi2ConfigReply_t *mpi_reply, Mpi2IOUnitPage3_t *config_page, u16 sz);
-#endif
 int mpt3sas_config_set_iounit_pg1(struct MPT3SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 	*mpi_reply, Mpi2IOUnitPage1_t *config_page);
 int mpt3sas_config_get_iounit_pg8(struct MPT3SAS_ADAPTER *ioc, Mpi2ConfigReply_t
@@ -1390,12 +1357,8 @@ int mpt3sas_config_get_volume_wwid(struct MPT3SAS_ADAPTER *ioc,
 /* ctl shared API */
 extern struct device_attribute *mpt3sas_host_attrs[];
 extern struct device_attribute *mpt3sas_dev_attrs[];
-long ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-unsigned int ctl_poll(struct file *filep, poll_table *wait);
-int ctl_fasync(int fd, struct file *filep, int mode);
-long ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg);
-void ctl_init(void);
-void ctl_exit(void);
+void mpt3sas_ctl_init(ushort hbas_to_enumerate);
+void mpt3sas_ctl_exit(ushort hbas_to_enumerate);
 u8 mpt3sas_ctl_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 	u32 reply);
 void mpt3sas_ctl_reset_handler(struct MPT3SAS_ADAPTER *ioc, int reset_phase);
@@ -1442,4 +1405,18 @@ void mpt3sas_trigger_scsi(struct MPT3SAS_ADAPTER *ioc, u8 sense_key,
 	u8 asc, u8 ascq);
 void mpt3sas_trigger_mpi(struct MPT3SAS_ADAPTER *ioc, u16 ioc_status,
 	u32 loginfo);
+
+/* warpdrive APIs */
+u8 mpt3sas_get_num_volumes(struct MPT3SAS_ADAPTER *ioc);
+void mpt3sas_init_warpdrive_properties(struct MPT3SAS_ADAPTER *ioc,
+	struct _raid_device *raid_device);
+inline u8
+mpt3sas_scsi_direct_io_get(struct MPT3SAS_ADAPTER *ioc, u16 smid);
+inline void
+mpt3sas_scsi_direct_io_set(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 direct_io);
+void
+mpt3sas_setup_direct_io(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
+	struct _raid_device *raid_device, Mpi2SCSIIORequest_t *mpi_request,
+	u16 smid);
+
 #endif /* MPT3SAS_BASE_H_INCLUDED */
diff --git a/drivers/scsi/mpt3sas/mpt3sas_config.c b/drivers/scsi/mpt3sas/mpt3sas_config.c
index 2bbb0346b462..a6914ec99cc0 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_config.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_config.c
@@ -865,7 +865,6 @@ mpt3sas_config_set_iounit_pg1(struct MPT3SAS_ADAPTER *ioc,
 	return r;
 }
 
-#ifdef SCSI_MPT2SAS
 /**
  * mpt3sas_config_get_iounit_pg3 - obtain iounit page 3
  * @ioc: per adapter object
@@ -901,7 +900,6 @@ mpt3sas_config_get_iounit_pg3(struct MPT3SAS_ADAPTER *ioc,
  out:
 	return r;
 }
-#endif
 
 /**
  * mpt3sas_config_get_iounit_pg8 - obtain iounit page 8
diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
index f257c962c899..d8366b056b70 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
@@ -409,11 +409,14 @@ mpt3sas_ctl_event_callback(struct MPT3SAS_ADAPTER *ioc, u8 msix_index,
  * _ctl_verify_adapter - validates ioc_number passed from application
  * @ioc: per adapter object
  * @iocpp: The ioc pointer is returned in this.
+ * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
+ *		MPI25_VERSION for mpt3ctl ioctl device.
  *
  * Return (-1) means error, else ioc_number.
  */
 static int
-_ctl_verify_adapter(int ioc_number, struct MPT3SAS_ADAPTER **iocpp)
+_ctl_verify_adapter(int ioc_number, struct MPT3SAS_ADAPTER **iocpp,
+							int mpi_version)
 {
 	struct MPT3SAS_ADAPTER *ioc;
 	/* global ioc lock to protect controller on list operations */
@@ -421,6 +424,11 @@ _ctl_verify_adapter(int ioc_number, struct MPT3SAS_ADAPTER **iocpp)
 	list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
 		if (ioc->id != ioc_number)
 			continue;
+		/* Check whether this ioctl command is from right
+		 * ioctl device or not, if not continue the search.
+		 */
+		if (ioc->hba_mpi_version_belonged != mpi_version)
+			continue;
 		spin_unlock(&gioc_lock);
 		*iocpp = ioc;
 		return ioc_number;
@@ -488,7 +496,7 @@ mpt3sas_ctl_reset_handler(struct MPT3SAS_ADAPTER *ioc, int reset_phase)
 }
 
 /**
- * ctl_fasync -
+ * _ctl_fasync -
  * @fd -
  * @filep -
  * @mode -
@@ -496,19 +504,19 @@ mpt3sas_ctl_reset_handler(struct MPT3SAS_ADAPTER *ioc, int reset_phase)
  * Called when application request fasyn callback handler.
  */
 int
-ctl_fasync(int fd, struct file *filep, int mode)
+_ctl_fasync(int fd, struct file *filep, int mode)
 {
 	return fasync_helper(fd, filep, mode, &async_queue);
 }
 
 /**
- * ctl_poll -
+ * _ctl_poll -
  * @file -
  * @wait -
  *
  */
 unsigned int
-ctl_poll(struct file *filep, poll_table *wait)
+_ctl_poll(struct file *filep, poll_table *wait)
 {
 	struct MPT3SAS_ADAPTER *ioc;
 
@@ -1034,7 +1042,7 @@ _ctl_getiocinfo(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
 	karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
 	karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
 	karg.firmware_version = ioc->facts.FWVersion.Word;
-	strcpy(karg.driver_version, driver_name);
+	strcpy(karg.driver_version, ioc->driver_name);
 	strcat(karg.driver_version, "-");
 	switch  (ioc->hba_mpi_version_belonged) {
 	case MPI2_VERSION:
@@ -1049,10 +1057,6 @@ _ctl_getiocinfo(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
 		strcat(karg.driver_version, MPT3SAS_DRIVER_VERSION);
 		break;
 	}
-	if (ioc->hba_mpi_version_belonged == MPI2_VERSION)
-		strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
-	else
-		strcat(karg.driver_version, MPT3SAS_DRIVER_VERSION);
 	karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
 
 	if (copy_to_user(arg, &karg, sizeof(karg))) {
@@ -2196,12 +2200,14 @@ _ctl_compat_mpt_command(struct MPT3SAS_ADAPTER *ioc, unsigned cmd,
  * _ctl_ioctl_main - main ioctl entry point
  * @file - (struct file)
  * @cmd - ioctl opcode
- * @arg -
- * compat - handles 32 bit applications in 64bit os
+ * @arg - user space data buffer
+ * @compat - handles 32 bit applications in 64bit os
+ * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
+ *		MPI25_VERSION for mpt3ctl ioctl device.
  */
 static long
 _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
-	u8 compat)
+	u8 compat, u16 mpi_version)
 {
 	struct MPT3SAS_ADAPTER *ioc;
 	struct mpt3_ioctl_header ioctl_header;
@@ -2216,7 +2222,8 @@ _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
 		return -EFAULT;
 	}
 
-	if (_ctl_verify_adapter(ioctl_header.ioc_number, &ioc) == -1 || !ioc)
+	if (_ctl_verify_adapter(ioctl_header.ioc_number,
+				&ioc, mpi_version) == -1 || !ioc)
 		return -ENODEV;
 
 	/* pci_access_mutex lock acquired by ioctl path */
@@ -2324,23 +2331,43 @@ out_unlock_pciaccess:
 }
 
 /**
- * ctl_ioctl - main ioctl entry point (unlocked)
+ * _ctl_ioctl - mpt3ctl main ioctl entry point (unlocked)
  * @file - (struct file)
  * @cmd - ioctl opcode
  * @arg -
  */
 long
-ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	long ret;
 
-	ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0);
+	/* pass MPI25_VERSION value, to indicate that this ioctl cmd
+	 * came from mpt3ctl ioctl device.
+	 */
+	ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0, MPI25_VERSION);
 	return ret;
 }
 
+/**
+ * _ctl_mpt2_ioctl - mpt2ctl main ioctl entry point (unlocked)
+ * @file - (struct file)
+ * @cmd - ioctl opcode
+ * @arg -
+ */
+long
+_ctl_mpt2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	long ret;
+
+	/* pass MPI2_VERSION value, to indicate that this ioctl cmd
+	 * came from mpt2ctl ioctl device.
+	 */
+	ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0, MPI2_VERSION);
+	return ret;
+}
 #ifdef CONFIG_COMPAT
 /**
- * ctl_ioctl_compat - main ioctl entry point (compat)
+ *_ ctl_ioctl_compat - main ioctl entry point (compat)
  * @file -
  * @cmd -
  * @arg -
@@ -2348,11 +2375,28 @@ ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
  * This routine handles 32 bit applications in 64bit os.
  */
 long
-ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
+_ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
 {
 	long ret;
 
-	ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1);
+	ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1, MPI25_VERSION);
+	return ret;
+}
+
+/**
+ *_ ctl_mpt2_ioctl_compat - main ioctl entry point (compat)
+ * @file -
+ * @cmd -
+ * @arg -
+ *
+ * This routine handles 32 bit applications in 64bit os.
+ */
+long
+_ctl_mpt2_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
+{
+	long ret;
+
+	ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1, MPI2_VERSION);
 	return ret;
 }
 #endif
@@ -2739,7 +2783,6 @@ _ctl_ioc_reply_queue_count_show(struct device *cdev,
 static DEVICE_ATTR(reply_queue_count, S_IRUGO, _ctl_ioc_reply_queue_count_show,
 	NULL);
 
-#ifdef SCSI_MPT2SAS
 /**
  * _ctl_BRM_status_show - Backup Rail Monitor Status
  * @cdev - pointer to embedded class device
@@ -2815,7 +2858,6 @@ _ctl_BRM_status_show(struct device *cdev, struct device_attribute *attr,
 	return rc;
 }
 static DEVICE_ATTR(BRM_status, S_IRUGO, _ctl_BRM_status_show, NULL);
-#endif
 
 struct DIAG_BUFFER_START {
 	__le32	Size;
@@ -3269,9 +3311,7 @@ struct device_attribute *mpt3sas_host_attrs[] = {
 	&dev_attr_diag_trigger_event,
 	&dev_attr_diag_trigger_scsi,
 	&dev_attr_diag_trigger_mpi,
-#ifdef SCSI_MPT2SAS
 	&dev_attr_BRM_status,
-#endif
 	NULL,
 };
 
@@ -3325,23 +3365,74 @@ struct device_attribute *mpt3sas_dev_attrs[] = {
 	NULL,
 };
 
+/* file operations table for mpt3ctl device */
+static const struct file_operations ctl_fops = {
+	.owner = THIS_MODULE,
+	.unlocked_ioctl = _ctl_ioctl,
+	.poll = _ctl_poll,
+	.fasync = _ctl_fasync,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = _ctl_ioctl_compat,
+#endif
+};
+
+/* file operations table for mpt2ctl device */
+static const struct file_operations ctl_gen2_fops = {
+	.owner = THIS_MODULE,
+	.unlocked_ioctl = _ctl_mpt2_ioctl,
+	.poll = _ctl_poll,
+	.fasync = _ctl_fasync,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = _ctl_mpt2_ioctl_compat,
+#endif
+};
+
+static struct miscdevice ctl_dev = {
+	.minor  = MPT3SAS_MINOR,
+	.name   = MPT3SAS_DEV_NAME,
+	.fops   = &ctl_fops,
+};
+
+static struct miscdevice gen2_ctl_dev = {
+	.minor  = MPT2SAS_MINOR,
+	.name   = MPT2SAS_DEV_NAME,
+	.fops   = &ctl_gen2_fops,
+};
+
 /**
- * ctl_init - main entry point for ctl.
+ * mpt3sas_ctl_init - main entry point for ctl.
  *
  */
 void
-ctl_init(void)
+mpt3sas_ctl_init(ushort hbas_to_enumerate)
 {
 	async_queue = NULL;
+
+	/* Don't register mpt3ctl ioctl device if
+	 * hbas_to_enumarate is one.
+	 */
+	if (hbas_to_enumerate != 1)
+		if (misc_register(