mpt2sas: Move Gen2 HBA's device registration to a separate file

1. Create a mpt2sas_module.c file for mpt2sas where GEN2 HBA devices
register with PCI, SML, IOCTL subsystems.

2. Updated the Makefile to use the object files from mpt3sas folder.

3. Defined a compilation flag SCSI_MPT2SAS which can be used to not
include those sections of code from mpt3sas driver which are not
required for mpt2sas driver.

4. Inherited automatic diag buffer feature from mpt3sas driver.

Signed-off-by: Sreekanth Reddy <[e-mail]>
Acked-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/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 +=  mpt2sas_base.o        \
-		mpt2sas_config.o    \
-		mpt2sas_scsih.o     \
-		mpt2sas_transport.o \
-		mpt2sas_ctl.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

drivers/scsi/mpt2sas/mpt2sas_module.c

···
+/*
+ * Scsi Host Layer for MPT (Message Passing Technology) based controllers
+ *
+ * Copyright (C) 2012-2014  LSI Corporation
+ * Copyright (C) 2013-2015 Avago Technologies
+ *  (mailto: [e-mail])
+ *
+ * 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;
+
+	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);

drivers/scsi/mpt3sas/mpt3sas_ctl.h

···
 #include <linux/miscdevice.h>
 #endif
 
-
+#ifndef MPT2SAS_MINOR
+#define MPT2SAS_MINOR		(MPT_MINOR + 1)
+#endif
 #ifndef MPT3SAS_MINOR
 #define MPT3SAS_MINOR		(MPT_MINOR + 2)
 #endif
+#define MPT2SAS_DEV_NAME	"mpt2ctl"
 #define MPT3SAS_DEV_NAME	"mpt3ctl"
 #define MPT3_MAGIC_NUMBER	'L'
 #define MPT3_IOCTL_DEFAULT_TIMEOUT (10) /* in seconds */