Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 4276 insertions, 0 deletions

diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
new file mode 100644
index 00000000000..138fa481583
--- /dev/null
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -0,0 +1,4276 @@
+/*
+ *
+ *			Linux MegaRAID device driver
+ *
+ * Copyright (c) 2003-2004  LSI Logic Corporation.
+ *
+ *	   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.
+ *
+ * FILE		: megaraid_mbox.c
+ * Version	: v2.20.4.5 (Feb 03 2005)
+ *
+ * Authors:
+ * 	Atul Mukker		<Atul.Mukker@lsil.com>
+ * 	Sreenivas Bagalkote	<Sreenivas.Bagalkote@lsil.com>
+ * 	Manoj Jose		<Manoj.Jose@lsil.com>
+ *
+ * List of supported controllers
+ *
+ * OEM	Product Name			VID	DID	SSVID	SSID
+ * ---	------------			---	---	----	----
+ * Dell PERC3/QC			101E	1960	1028	0471
+ * Dell PERC3/DC			101E	1960	1028	0493
+ * Dell PERC3/SC			101E	1960	1028	0475
+ * Dell PERC3/Di			1028	1960	1028	0123
+ * Dell PERC4/SC			1000	1960	1028	0520
+ * Dell PERC4/DC			1000	1960	1028	0518
+ * Dell PERC4/QC			1000	0407	1028	0531
+ * Dell PERC4/Di			1028	000F	1028	014A
+ * Dell PERC 4e/Si			1028	0013	1028	016c
+ * Dell PERC 4e/Di			1028	0013	1028	016d
+ * Dell PERC 4e/Di			1028	0013	1028	016e
+ * Dell PERC 4e/Di			1028	0013	1028	016f
+ * Dell PERC 4e/Di			1028	0013	1028	0170
+ * Dell PERC 4e/DC			1000	0408	1028	0002
+ * Dell PERC 4e/SC			1000	0408	1028	0001
+ *
+ *
+ * LSI MegaRAID SCSI 320-0		1000	1960	1000	A520
+ * LSI MegaRAID SCSI 320-1		1000	1960	1000	0520
+ * LSI MegaRAID SCSI 320-2		1000	1960	1000	0518
+ * LSI MegaRAID SCSI 320-0X		1000	0407	1000	0530
+ * LSI MegaRAID SCSI 320-2X		1000	0407	1000	0532
+ * LSI MegaRAID SCSI 320-4X		1000	0407	1000	0531
+ * LSI MegaRAID SCSI 320-1E		1000	0408	1000	0001
+ * LSI MegaRAID SCSI 320-2E		1000	0408	1000	0002
+ * LSI MegaRAID SATA 150-4		1000	1960	1000	4523
+ * LSI MegaRAID SATA 150-6		1000	1960	1000	0523
+ * LSI MegaRAID SATA 300-4X		1000	0409	1000	3004
+ * LSI MegaRAID SATA 300-8X		1000	0409	1000	3008
+ *
+ * INTEL RAID Controller SRCU42X	1000	0407	8086	0532
+ * INTEL RAID Controller SRCS16		1000	1960	8086	0523
+ * INTEL RAID Controller SRCU42E	1000	0408	8086	0002
+ * INTEL RAID Controller SRCZCRX	1000	0407	8086	0530
+ * INTEL RAID Controller SRCS28X	1000	0409	8086	3008
+ * INTEL RAID Controller SROMBU42E	1000	0408	8086	3431
+ * INTEL RAID Controller SROMBU42E	1000	0408	8086	3499
+ * INTEL RAID Controller SRCU51L	1000	1960	8086	0520
+ *
+ * FSC	MegaRAID PCI Express ROMB	1000	0408	1734	1065
+ *
+ * ACER	MegaRAID ROMB-2E		1000	0408	1025	004D
+ *
+ * NEC	MegaRAID PCI Express ROMB	1000	0408	1033	8287
+ *
+ * For history of changes, see Documentation/ChangeLog.megaraid
+ */
+
+#include "megaraid_mbox.h"
+
+static int megaraid_init(void);
+static void megaraid_exit(void);
+
+static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
+static void megaraid_detach_one(struct pci_dev *);
+static void megaraid_mbox_shutdown(struct device *);
+
+static int megaraid_io_attach(adapter_t *);
+static void megaraid_io_detach(adapter_t *);
+
+static int megaraid_init_mbox(adapter_t *);
+static void megaraid_fini_mbox(adapter_t *);
+
+static int megaraid_alloc_cmd_packets(adapter_t *);
+static void megaraid_free_cmd_packets(adapter_t *);
+
+static int megaraid_mbox_setup_dma_pools(adapter_t *);
+static void megaraid_mbox_teardown_dma_pools(adapter_t *);
+
+static int megaraid_sysfs_alloc_resources(adapter_t *);
+static void megaraid_sysfs_free_resources(adapter_t *);
+
+static int megaraid_abort_handler(struct scsi_cmnd *);
+static int megaraid_reset_handler(struct scsi_cmnd *);
+
+static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
+static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
+static int megaraid_busywait_mbox(mraid_device_t *);
+static int megaraid_mbox_product_info(adapter_t *);
+static int megaraid_mbox_extended_cdb(adapter_t *);
+static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
+static int megaraid_mbox_support_random_del(adapter_t *);
+static int megaraid_mbox_get_max_sg(adapter_t *);
+static void megaraid_mbox_enum_raid_scsi(adapter_t *);
+static void megaraid_mbox_flush_cache(adapter_t *);
+
+static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
+static void megaraid_mbox_setup_device_map(adapter_t *);
+
+static int megaraid_queue_command(struct scsi_cmnd *,
+		void (*)(struct scsi_cmnd *));
+static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
+static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
+static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
+		struct scsi_cmnd *);
+static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
+		struct scsi_cmnd *);
+
+static irqreturn_t megaraid_isr(int, void *, struct pt_regs *);
+
+static void megaraid_mbox_dpc(unsigned long);
+
+static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
+static ssize_t megaraid_sysfs_show_ldnum(struct device *, char *);
+
+static int megaraid_cmm_register(adapter_t *);
+static int megaraid_cmm_unregister(adapter_t *);
+static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
+static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
+static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
+static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
+static int wait_till_fw_empty(adapter_t *);
+
+
+
+MODULE_AUTHOR("LSI Logic Corporation");
+MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(MEGARAID_VERSION);
+
+/*
+ * ### modules parameters for driver ###
+ */
+
+/**
+ * Set to enable driver to expose unconfigured disk to kernel
+ */
+static int megaraid_expose_unconf_disks = 0;
+module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
+MODULE_PARM_DESC(unconf_disks,
+	"Set to expose unconfigured disks to kernel (default=0)");
+
+/**
+ * driver wait time if the adapter's mailbox is busy
+ */
+static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
+module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
+MODULE_PARM_DESC(busy_wait,
+	"Max wait for mailbox in microseconds if busy (default=10)");
+
+/**
+ * number of sectors per IO command
+ */
+static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
+module_param_named(max_sectors, megaraid_max_sectors, int, 0);
+MODULE_PARM_DESC(max_sectors,
+	"Maximum number of sectors per IO command (default=128)");
+
+/**
+ * number of commands per logical unit
+ */
+static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
+module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
+MODULE_PARM_DESC(cmd_per_lun,
+	"Maximum number of commands per logical unit (default=64)");
+
+
+/**
+ * Fast driver load option, skip scanning for physical devices during load.
+ * This would result in non-disk devices being skipped during driver load
+ * time. These can be later added though, using /proc/scsi/scsi
+ */
+static unsigned int megaraid_fast_load = 0;
+module_param_named(fast_load, megaraid_fast_load, int, 0);
+MODULE_PARM_DESC(fast_load,
+	"Faster loading of the driver, skips physical devices! (default=0)");
+
+
+/**
+ * mraid_debug level - threshold for amount of information to be displayed by
+ * the driver. This level can be changed through modules parameters, ioctl or
+ * sysfs/proc interface. By default, print the announcement messages only.
+ */
+int mraid_debug_level = CL_ANN;
+module_param_named(debug_level, mraid_debug_level, int, 0);
+MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
+
+/*
+ * ### global data ###
+ */
+static uint8_t megaraid_mbox_version[8] =
+	{ 0x02, 0x20, 0x04, 0x05, 2, 3, 20, 5 };
+
+
+/*
+ * PCI table for all supported controllers.
+ */
+static struct pci_device_id pci_id_table_g[] =  {
+	{
+		PCI_VENDOR_ID_DELL,
+		PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_PERC4_SC,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4_SC,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_PERC4_DC,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4_DC,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_PERC4_QC,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4_QC,
+	},
+	{
+		PCI_VENDOR_ID_DELL,
+		PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
+	},
+	{
+		PCI_VENDOR_ID_DELL,
+		PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
+	},
+	{
+		PCI_VENDOR_ID_DELL,
+		PCI_DEVICE_ID_PERC4E_DI_KOBUK,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
+	},
+	{
+		PCI_VENDOR_ID_DELL,
+		PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
+	},
+	{
+		PCI_VENDOR_ID_DELL,
+		PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
+	},
+	{
+		PCI_VENDOR_ID_DELL,
+		PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_PERC4E_DC_320_2E,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4E_DC_320_2E,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_PERC4E_SC_320_1E,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC4E_SC_320_1E,
+	},
+	{
+		PCI_VENDOR_ID_AMI,
+		PCI_DEVICE_ID_AMI_MEGARAID3,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC3_QC,
+	},
+	{
+		PCI_VENDOR_ID_AMI,
+		PCI_DEVICE_ID_AMI_MEGARAID3,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC3_DC,
+	},
+	{
+		PCI_VENDOR_ID_AMI,
+		PCI_DEVICE_ID_AMI_MEGARAID3,
+		PCI_VENDOR_ID_DELL,
+		PCI_SUBSYS_ID_PERC3_SC,
+	},
+	{
+		PCI_VENDOR_ID_AMI,
+		PCI_DEVICE_ID_AMI_MEGARAID3,
+		PCI_VENDOR_ID_AMI,
+		PCI_SUBSYS_ID_PERC3_SC,
+	},
+	{
+		PCI_VENDOR_ID_AMI,
+		PCI_DEVICE_ID_AMI_MEGARAID3,
+		PCI_VENDOR_ID_AMI,
+		PCI_SUBSYS_ID_PERC3_DC,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SCSI_320_0,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SCSI_320_0,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SCSI_320_1,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SCSI_320_1,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SCSI_320_2,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SCSI_320_2,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SCSI_320_0x,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SCSI_320_0x,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SCSI_320_2x,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SCSI_320_2x,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SCSI_320_4x,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SCSI_320_4x,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SCSI_320_1E,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SCSI_320_1E,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SCSI_320_2E,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SCSI_320_2E,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_I4_133_RAID,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_I4_133_RAID,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SATA_150_4,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SATA_150_4,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SATA_150_6,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SATA_150_6,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SATA_300_4x,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SATA_300_4x,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_SATA_300_8x,
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_SUBSYS_ID_MEGARAID_SATA_300_8x,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_INTEL_RAID_SRCU42X,
+		PCI_VENDOR_ID_INTEL,
+		PCI_SUBSYS_ID_INTEL_RAID_SRCU42X,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_INTEL_RAID_SRCS16,
+		PCI_VENDOR_ID_INTEL,
+		PCI_SUBSYS_ID_INTEL_RAID_SRCS16,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_INTEL_RAID_SRCU42E,
+		PCI_VENDOR_ID_INTEL,
+		PCI_SUBSYS_ID_INTEL_RAID_SRCU42E,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_INTEL_RAID_SRCZCRX,
+		PCI_VENDOR_ID_INTEL,
+		PCI_SUBSYS_ID_INTEL_RAID_SRCZCRX,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_INTEL_RAID_SRCS28X,
+		PCI_VENDOR_ID_INTEL,
+		PCI_SUBSYS_ID_INTEL_RAID_SRCS28X,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_INTEL_RAID_SROMBU42E_ALIEF,
+		PCI_VENDOR_ID_INTEL,
+		PCI_SUBSYS_ID_INTEL_RAID_SROMBU42E_ALIEF,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_INTEL_RAID_SROMBU42E_HARWICH,
+		PCI_VENDOR_ID_INTEL,
+		PCI_SUBSYS_ID_INTEL_RAID_SROMBU42E_HARWICH,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
+		PCI_VENDOR_ID_INTEL,
+		PCI_SUBSYS_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_FSC_MEGARAID_PCI_EXPRESS_ROMB,
+		PCI_SUBSYS_ID_FSC,
+		PCI_SUBSYS_ID_FSC_MEGARAID_PCI_EXPRESS_ROMB,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_ACER_ROMB_2E,
+		PCI_VENDOR_ID_AI,
+		PCI_SUBSYS_ID_MEGARAID_ACER_ROMB_2E,
+	},
+	{
+		PCI_VENDOR_ID_LSI_LOGIC,
+		PCI_DEVICE_ID_MEGARAID_NEC_ROMB_2E,
+		PCI_VENDOR_ID_NEC,
+		PCI_SUBSYS_ID_MEGARAID_NEC_ROMB_2E,
+	},
+	{0}	/* Terminating entry */
+};
+MODULE_DEVICE_TABLE(pci, pci_id_table_g);
+
+
+static struct pci_driver megaraid_pci_driver_g = {
+	.name		= "megaraid",
+	.id_table	= pci_id_table_g,
+	.probe		= megaraid_probe_one,
+	.remove		= __devexit_p(megaraid_detach_one),
+	.driver		= {
+		.shutdown	= megaraid_mbox_shutdown,
+	}
+};
+
+
+
+// definitions for the device attributes for exporting logical drive number
+// for a scsi address (Host, Channel, Id, Lun)
+
+CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
+		NULL);
+
+// Host template initializer for megaraid mbox sysfs device attributes
+static struct class_device_attribute *megaraid_shost_attrs[] = {
+	&class_device_attr_megaraid_mbox_app_hndl,
+	NULL,
+};
+
+
+DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
+
+// Host template initializer for megaraid mbox sysfs device attributes
+static struct device_attribute *megaraid_sdev_attrs[] = {
+	&dev_attr_megaraid_mbox_ld,
+	NULL,
+};
+
+
+/*
+ * Scsi host template for megaraid unified driver
+ */
+static struct scsi_host_template megaraid_template_g = {
+	.module				= THIS_MODULE,
+	.name				= "LSI Logic MegaRAID driver",
+	.proc_name			= "megaraid",
+	.queuecommand			= megaraid_queue_command,
+	.eh_abort_handler		= megaraid_abort_handler,
+	.eh_device_reset_handler	= megaraid_reset_handler,
+	.eh_bus_reset_handler		= megaraid_reset_handler,
+	.eh_host_reset_handler		= megaraid_reset_handler,
+	.use_clustering			= ENABLE_CLUSTERING,
+	.sdev_attrs			= megaraid_sdev_attrs,
+	.shost_attrs			= megaraid_shost_attrs,
+};
+
+
+/**
+ * megaraid_init - module load hook
+ *
+ * We register ourselves as hotplug enabled module and let PCI subsystem
+ * discover our adaters
+ **/
+static int __init
+megaraid_init(void)
+{
+	int	rval;
+
+	// Announce the driver version
+	con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
+		MEGARAID_EXT_VERSION));
+
+	// check validity of module parameters
+	if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
+
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid mailbox: max commands per lun reset to %d\n",
+			MBOX_MAX_SCSI_CMDS));
+
+		megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
+	}
+
+
+	// register as a PCI hot-plug driver module
+	if ((rval = pci_module_init(&megaraid_pci_driver_g))) {
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: could not register hotplug support.\n"));
+	}
+
+	return rval;
+}
+
+
+/**
+ * megaraid_exit - driver unload entry point
+ *
+ * We simply unwrap the megaraid_init routine here
+ */
+static void __exit
+megaraid_exit(void)
+{
+	con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
+
+	// unregister as PCI hotplug driver
+	pci_unregister_driver(&megaraid_pci_driver_g);
+
+	return;
+}
+
+
+/**
+ * megaraid_probe_one - PCI hotplug entry point
+ * @param pdev	: handle to this controller's PCI configuration space
+ * @param id	: pci device id of the class of controllers
+ *
+ * This routine should be called whenever a new adapter is detected by the
+ * PCI hotplug susbsytem.
+ **/
+static int __devinit
+megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	adapter_t	*adapter;
+
+
+	// detected a new controller
+	con_log(CL_ANN, (KERN_INFO
+		"megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
+		pdev->vendor, pdev->device, pdev->subsystem_vendor,
+		pdev->subsystem_device));
+
+	con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
+		PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
+
+	if (pci_enable_device(pdev)) {
+		con_log(CL_ANN, (KERN_WARNING
+				"megaraid: pci_enable_device failed\n"));
+
+		return -ENODEV;
+	}
+
+	// Enable bus-mastering on this controller
+	pci_set_master(pdev);
+
+	// Allocate the per driver initialization structure
+	adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
+
+	if (adapter == NULL) {
+		con_log(CL_ANN, (KERN_WARNING
+		"megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
+
+		goto out_probe_one;
+	}
+	memset(adapter, 0, sizeof(adapter_t));
+
+
+	// set up PCI related soft state and other pre-known parameters
+	adapter->unique_id	= pdev->bus->number << 8 | pdev->devfn;
+	adapter->irq		= pdev->irq;
+	adapter->pdev		= pdev;
+
+	atomic_set(&adapter->being_detached, 0);
+
+	// Setup the default DMA mask. This would be changed later on
+	// depending on hardware capabilities
+	if (pci_set_dma_mask(adapter->pdev, 0xFFFFFFFF) != 0) {
+
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
+
+		goto out_free_adapter;
+	}
+
+
+	// Initialize the synchronization lock for kernel and LLD
+	spin_lock_init(&adapter->lock);
+	adapter->host_lock = &adapter->lock;
+
+
+	// Initialize the command queues: the list of free SCBs and the list
+	// of pending SCBs.
+	INIT_LIST_HEAD(&adapter->kscb_pool);
+	spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
+
+	INIT_LIST_HEAD(&adapter->pend_list);
+	spin_lock_init(PENDING_LIST_LOCK(adapter));
+
+	INIT_LIST_HEAD(&adapter->completed_list);
+	spin_lock_init(COMPLETED_LIST_LOCK(adapter));
+
+
+	// Start the mailbox based controller
+	if (megaraid_init_mbox(adapter) != 0) {
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: maibox adapter did not initialize\n"));
+
+		goto out_free_adapter;
+	}
+
+	// Register with LSI Common Management Module
+	if (megaraid_cmm_register(adapter) != 0) {
+
+		con_log(CL_ANN, (KERN_WARNING
+		"megaraid: could not register with management module\n"));
+
+		goto out_fini_mbox;
+	}
+
+	// setup adapter handle in PCI soft state
+	pci_set_drvdata(pdev, adapter);
+
+	// attach with scsi mid-layer
+	if (megaraid_io_attach(adapter) != 0) {
+
+		con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
+
+		goto out_cmm_unreg;
+	}
+
+	return 0;
+
+out_cmm_unreg:
+	pci_set_drvdata(pdev, NULL);
+	megaraid_cmm_unregister(adapter);
+out_fini_mbox:
+	megaraid_fini_mbox(adapter);
+out_free_adapter:
+	kfree(adapter);
+out_probe_one:
+	pci_disable_device(pdev);
+
+	return -ENODEV;
+}
+
+
+/**
+ * megaraid_detach_one - release the framework resources and call LLD release
+ * routine
+ * @param pdev	: handle for our PCI cofiguration space
+ *
+ * This routine is called during driver unload. We free all the allocated
+ * resources and call the corresponding LLD so that it can also release all
+ * its resources.
+ *
+ * This routine is also called from the PCI hotplug system
+ **/
+static void
+megaraid_detach_one(struct pci_dev *pdev)
+{
+	adapter_t		*adapter;
+	struct Scsi_Host	*host;
+
+
+	// Start a rollback on this adapter
+	adapter = pci_get_drvdata(pdev);
+
+	if (!adapter) {
+		con_log(CL_ANN, (KERN_CRIT
+		"megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
+			pdev->vendor, pdev->device, pdev->subsystem_vendor,
+			pdev->subsystem_device));
+
+		return;
+	}
+	else {
+		con_log(CL_ANN, (KERN_NOTICE
+		"megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
+			pdev->vendor, pdev->device, pdev->subsystem_vendor,
+			pdev->subsystem_device));
+	}
+
+
+	host = adapter->host;
+
+	// do not allow any more requests from the management module for this
+	// adapter.
+	// FIXME: How do we account for the request which might still be
+	// pending with us?
+	atomic_set(&adapter->being_detached, 1);
+
+	// detach from the IO sub-system
+	megaraid_io_detach(adapter);
+
+	// reset the device state in the PCI structure. We check this
+	// condition when we enter here. If the device state is NULL,
+	// that would mean the device has already been removed
+	pci_set_drvdata(pdev, NULL);
+
+	// Unregister from common management module
+	//
+	// FIXME: this must return success or failure for conditions if there
+	// is a command pending with LLD or not.
+	megaraid_cmm_unregister(adapter);
+
+	// finalize the mailbox based controller and release all resources
+	megaraid_fini_mbox(adapter);
+
+	kfree(adapter);
+
+	scsi_host_put(host);
+
+	pci_disable_device(pdev);
+
+	return;
+}
+
+
+/**
+ * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
+ * @param device	: generice driver model device
+ *
+ * Shutdown notification, perform flush cache
+ */
+static void
+megaraid_mbox_shutdown(struct device *device)
+{
+	adapter_t		*adapter = pci_get_drvdata(to_pci_dev(device));
+	static int		counter;
+
+	if (!adapter) {
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: null device in shutdown\n"));
+		return;
+	}
+
+	// flush caches now
+	con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
+		counter++));
+
+	megaraid_mbox_flush_cache(adapter);
+
+	con_log(CL_ANN, ("done\n"));
+}
+
+
+/**
+ * megaraid_io_attach - attach a device with the IO subsystem
+ * @param adapter	: controller's soft state
+ *
+ * Attach this device with the IO subsystem
+ **/
+static int
+megaraid_io_attach(adapter_t *adapter)
+{
+	struct Scsi_Host	*host;
+
+	// Initialize SCSI Host structure
+	host = scsi_host_alloc(&megaraid_template_g, 8);
+	if (!host) {
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid mbox: scsi_register failed\n"));
+
+		return -1;
+	}
+
+	SCSIHOST2ADAP(host)	= (caddr_t)adapter;
+	adapter->host		= host;
+
+	// export the parameters required by the mid-layer
+	scsi_assign_lock(host, adapter->host_lock);
+	scsi_set_device(host, &adapter->pdev->dev);
+
+	host->irq		= adapter->irq;
+	host->unique_id		= adapter->unique_id;
+	host->can_queue		= adapter->max_cmds;
+	host->this_id		= adapter->init_id;
+	host->sg_tablesize	= adapter->sglen;
+	host->max_sectors	= adapter->max_sectors;
+	host->cmd_per_lun	= adapter->cmd_per_lun;
+	host->max_channel	= adapter->max_channel;
+	host->max_id		= adapter->max_target;
+	host->max_lun		= adapter->max_lun;
+
+
+	// notify mid-layer about the new controller
+	if (scsi_add_host(host, &adapter->pdev->dev)) {
+
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid mbox: scsi_add_host failed\n"));
+
+		scsi_host_put(host);
+
+		return -1;
+	}
+
+	scsi_scan_host(host);
+
+	return 0;
+}
+
+
+/**
+ * megaraid_io_detach - detach a device from the IO subsystem
+ * @param adapter	: controller's soft state
+ *
+ * Detach this device from the IO subsystem
+ **/
+static void
+megaraid_io_detach(adapter_t *adapter)
+{
+	struct Scsi_Host	*host;
+
+	con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
+
+	host = adapter->host;
+
+	scsi_remove_host(host);
+
+	return;
+}
+
+
+/*
+ * START: Mailbox Low Level Driver
+ *
+ * This is section specific to the single mailbox based controllers
+ */
+
+/**
+ * megaraid_init_mbox - initialize controller
+ * @param adapter	- our soft state
+ *
+ * . Allocate 16-byte aligned mailbox memory for firmware handshake
+ * . Allocate controller's memory resources
+ * . Find out all initialization data
+ * . Allocate memory required for all the commands
+ * . Use internal library of FW routines, build up complete soft state
+ */
+static int __init
+megaraid_init_mbox(adapter_t *adapter)
+{
+	struct pci_dev		*pdev;
+	mraid_device_t		*raid_dev;
+	int			i;
+
+
+	adapter->ito	= MBOX_TIMEOUT;
+	pdev		= adapter->pdev;
+
+	/*
+	 * Allocate and initialize the init data structure for mailbox
+	 * controllers
+	 */
+	raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
+	if (raid_dev == NULL) return -1;
+
+	memset(raid_dev, 0, sizeof(mraid_device_t));
+
+	/*
+	 * Attach the adapter soft state to raid device soft state
+	 */
+	adapter->raid_device	= (caddr_t)raid_dev;
+	raid_dev->fast_load	= megaraid_fast_load;
+
+
+	// our baseport
+	raid_dev->baseport = pci_resource_start(pdev, 0);
+
+	if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
+
+		con_log(CL_ANN, (KERN_WARNING
+				"megaraid: mem region busy\n"));
+
+		goto out_free_raid_dev;
+	}
+
+	raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
+
+	if (!raid_dev->baseaddr) {
+
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: could not map hba memory\n") );
+
+		goto out_release_regions;
+	}
+
+	//
+	// Setup the rest of the soft state using the library of FW routines
+	//
+
+	// request IRQ and register the interrupt service routine
+	if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid",
+		adapter)) {
+
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: Couldn't register IRQ %d!\n", adapter->irq));
+
+		goto out_iounmap;
+	}
+
+
+	// initialize the mutual exclusion lock for the mailbox
+	spin_lock_init(&raid_dev->mailbox_lock);
+
+	// allocate memory required for commands
+	if (megaraid_alloc_cmd_packets(adapter) != 0) {
+		goto out_free_irq;
+	}
+
+	// Product info
+	if (megaraid_mbox_product_info(adapter) != 0) {
+		goto out_alloc_cmds;
+	}
+
+	// Do we support extended CDBs
+	adapter->max_cdb_sz = 10;
+	if (megaraid_mbox_extended_cdb(adapter) == 0) {
+		adapter->max_cdb_sz = 16;
+	}
+
+	/*
+	 * Do we support cluster environment, if we do, what is the initiator
+	 * id.
+	 * NOTE: In a non-cluster aware firmware environment, the LLD should
+	 * return 7 as initiator id.
+	 */
+	adapter->ha		= 0;
+	adapter->init_id	= -1;
+	if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
+		adapter->ha = 1;
+	}
+
+	/*
+	 * Prepare the device ids array to have the mapping between the kernel
+	 * device address and megaraid device address.
+	 * We export the physical devices on their actual addresses. The
+	 * logical drives are exported on a virtual SCSI channel
+	 */
+	megaraid_mbox_setup_device_map(adapter);
+
+	// If the firmware supports random deletion, update the device id map
+	if (megaraid_mbox_support_random_del(adapter)) {
+
+		// Change the logical drives numbers in device_ids array one
+		// slot in device_ids is reserved for target id, that's why
+		// "<=" below
+		for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
+			adapter->device_ids[adapter->max_channel][i] += 0x80;
+		}
+		adapter->device_ids[adapter->max_channel][adapter->init_id] =
+			0xFF;
+
+		raid_dev->random_del_supported = 1;
+	}
+
+	/*
+	 * find out the maximum number of scatter-gather elements supported by
+	 * this firmware
+	 */
+	adapter->sglen = megaraid_mbox_get_max_sg(adapter);
+
+	// enumerate RAID and SCSI channels so that all devices on SCSI
+	// channels can later be exported, including disk devices
+	megaraid_mbox_enum_raid_scsi(adapter);
+
+	/*
+	 * Other parameters required by upper layer
+	 *
+	 * maximum number of sectors per IO command
+	 */
+	adapter->max_sectors = megaraid_max_sectors;
+
+	/*
+	 * number of queued commands per LUN.
+	 */
+	adapter->cmd_per_lun = megaraid_cmd_per_lun;
+
+	/*
+	 * Allocate resources required to issue FW calls, when sysfs is
+	 * accessed
+	 */
+	if (megaraid_sysfs_alloc_resources(adapter) != 0) {
+		goto out_alloc_cmds;
+	}
+
+	// Set the DMA mask to 64-bit. All supported controllers as capable of
+	// DMA in this range
+	if (pci_set_dma_mask(adapter->pdev, 0xFFFFFFFFFFFFFFFFULL) != 0) {
+
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: could not set DMA mask for 64-bit.\n"));
+
+		goto out_free_sysfs_res;
+	}
+
+	// setup tasklet for DPC
+	tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
+			(unsigned long)adapter);
+
+	con_log(CL_DLEVEL1, (KERN_INFO
+		"megaraid mbox hba successfully initialized\n"));
+
+	return 0;
+
+out_free_sysfs_res:
+	megaraid_sysfs_free_resources(adapter);
+out_alloc_cmds:
+	megaraid_free_cmd_packets(adapter);
+out_free_irq:
+	free_irq(adapter->irq, adapter);
+out_iounmap:
+	iounmap(raid_dev->baseaddr);
+out_release_regions:
+	pci_release_regions(pdev);
+out_free_raid_dev:
+	kfree(raid_dev);
+
+	return -1;
+}
+
+
+/**
+ * megaraid_fini_mbox - undo controller initialization
+ * @param adapter	: our soft state
+ */
+static void
+megaraid_fini_mbox(adapter_t *adapter)
+{
+	mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
+
+	// flush all caches
+	megaraid_mbox_flush_cache(adapter);
+
+	tasklet_kill(&adapter->dpc_h);
+
+	megaraid_sysfs_free_resources(adapter);
+
+	megaraid_free_cmd_packets(adapter);
+
+	free_irq(adapter->irq, adapter);
+
+	iounmap(raid_dev->baseaddr);
+
+	pci_release_regions(adapter->pdev);
+
+	kfree(raid_dev);
+
+	return;
+}
+
+
+/**
+ * megaraid_alloc_cmd_packets - allocate shared mailbox
+ * @param adapter	: soft state of the raid controller
+ *
+ * Allocate and align the shared mailbox. This maibox is used to issue
+ * all the commands. For IO based controllers, the mailbox is also regsitered
+ * with the FW. Allocate memory for all commands as well.
+ * This is our big allocator
+ */
+static int
+megaraid_alloc_cmd_packets(adapter_t *adapter)
+{
+	mraid_device_t		*raid_dev = ADAP2RAIDDEV(adapter);
+	struct pci_dev		*pdev;
+	unsigned long		align;
+	scb_t			*scb;
+	mbox_ccb_t		*ccb;
+	struct mraid_pci_blk	*epthru_pci_blk;
+	struct mraid_pci_blk	*sg_pci_blk;
+	struct mraid_pci_blk	*mbox_pci_blk;
+	int			i;
+
+	pdev = adapter->pdev;
+
+	/*
+	 * Setup the mailbox
+	 * Allocate the common 16-byte aligned memory for the handshake
+	 * mailbox.
+	 */
+	raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
+			sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
+
+	if (!raid_dev->una_mbox64) {
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: out of memory, %s %d\n", __FUNCTION__,
+			__LINE__));
+		return -1;
+	}
+	memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
+
+	/*
+	 * Align the mailbox at 16-byte boundary
+	 */
+	raid_dev->mbox	= &raid_dev->una_mbox64->mbox32;
+
+	raid_dev->mbox	= (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
+				(~0UL ^ 0xFUL));
+
+	raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
+
+	align = ((void *)raid_dev->mbox -
+			((void *)&raid_dev->una_mbox64->mbox32));
+
+	raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
+			align;
+
+	// Allocate memory for commands issued internally
+	adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
+				&adapter->ibuf_dma_h);
+	if (!adapter->ibuf) {
+
+		con_log(CL_ANN, (KERN_WARNING
+			"megaraid: out of memory, %s %d\n", __FUNCTION__,
+			__LINE__));
+
+		goto out_free_common_mbox;
+	}
+	memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
+
+	// Allocate memory for our SCSI Command Blocks and their associated
+	// memory
+
+	/*
+	 * Allocate memory for the base list of scb. Later allocate memory for
+	 * CCBs and embedded components of each CCB and point the pointers in
+	 * scb to the allocated components
+	 * NOTE: The code to allocate SCB will be duplicated in all the LLD
+	 * since the calling routine does not yet know the number of available
+	 * commands.
+	 */
+	adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
+			GFP_KERNEL);
+
+	if (adapter->kscb_list == NULL) {