megaraid_mbox.c

linux-2.6.15.6

/*
 *
 *			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	: v2.20.4.6 (Mar 07 2005)
 *
 * Authors:
 * 	Atul Mukker		<[e-mail]>
 * 	Sreenivas Bagalkote	<[e-mail]>
 * 	Manoj Jose		<[e-mail]>
 *
 * 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 pci_dev *);

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 *, struct device_attribute *attr, 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, 0x06, 3, 7, 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_VERDE,
		PCI_ANY_ID,
		PCI_ANY_ID,
	},
	{
		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_DOBSON,
		PCI_ANY_ID,
		PCI_ANY_ID,
	},
	{
		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_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_LINDSAY,
		PCI_ANY_ID,
		PCI_ANY_ID,
	},
	{
		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_SRCU41L_LAKE_SHETEK,
		PCI_VENDOR_ID_INTEL,
		PCI_SUBSYS_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
	},
	{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),
	.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
	rval = pci_register_driver(&megaraid_pci_driver_g);
	if (rval < 0) {
		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, DMA_32BIT_MASK) != 0) {

		con_log(CL_ANN, (KERN_WARNING
			"megaraid: pci_set_dma_mask failed:%d\n", __LINE__));