path: root/drivers/scsi/stex.c

/*
 * SuperTrak EX Series Storage Controller driver for Linux
 *
 *	Copyright (C) 2005, 2006 Promise Technology Inc.
 *
 *	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.
 *
 *	Written By:
 *		Ed Lin <promise_linux@promise.com>
 *
 *	Version: 2.9.0.13
 *
 */

#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>

#define DRV_NAME "stex"
#define ST_DRIVER_VERSION "2.9.0.13"
#define ST_VER_MAJOR 		2
#define ST_VER_MINOR 		9
#define ST_OEM 			0
#define ST_BUILD_VER 		13

enum {
	/* MU register offset */
	IMR0	= 0x10,	/* MU_INBOUND_MESSAGE_REG0 */
	IMR1	= 0x14,	/* MU_INBOUND_MESSAGE_REG1 */
	OMR0	= 0x18,	/* MU_OUTBOUND_MESSAGE_REG0 */
	OMR1	= 0x1c,	/* MU_OUTBOUND_MESSAGE_REG1 */
	IDBL	= 0x20,	/* MU_INBOUND_DOORBELL */
	IIS	= 0x24,	/* MU_INBOUND_INTERRUPT_STATUS */
	IIM	= 0x28,	/* MU_INBOUND_INTERRUPT_MASK */
	ODBL	= 0x2c,	/* MU_OUTBOUND_DOORBELL */
	OIS	= 0x30,	/* MU_OUTBOUND_INTERRUPT_STATUS */
	OIM	= 0x3c,	/* MU_OUTBOUND_INTERRUPT_MASK */

	/* MU register value */
	MU_INBOUND_DOORBELL_HANDSHAKE		= 1,
	MU_INBOUND_DOORBELL_REQHEADCHANGED	= 2,
	MU_INBOUND_DOORBELL_STATUSTAILCHANGED	= 4,
	MU_INBOUND_DOORBELL_HMUSTOPPED		= 8,
	MU_INBOUND_DOORBELL_RESET		= 16,

	MU_OUTBOUND_DOORBELL_HANDSHAKE		= 1,
	MU_OUTBOUND_DOORBELL_REQUESTTAILCHANGED	= 2,
	MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED	= 4,
	MU_OUTBOUND_DOORBELL_BUSCHANGE		= 8,
	MU_OUTBOUND_DOORBELL_HASEVENT		= 16,

	/* MU status code */
	MU_STATE_STARTING			= 1,
	MU_STATE_FMU_READY_FOR_HANDSHAKE	= 2,
	MU_STATE_SEND_HANDSHAKE_FRAME		= 3,
	MU_STATE_STARTED			= 4,
	MU_STATE_RESETTING			= 5,

	MU_MAX_DELAY_TIME			= 240000,
	MU_HANDSHAKE_SIGNATURE			= 0x55aaaa55,
	HMU_PARTNER_TYPE			= 2,

	/* firmware returned values */
	SRB_STATUS_SUCCESS			= 0x01,
	SRB_STATUS_ERROR			= 0x04,
	SRB_STATUS_BUSY				= 0x05,
	SRB_STATUS_INVALID_REQUEST		= 0x06,
	SRB_STATUS_SELECTION_TIMEOUT		= 0x0A,
	SRB_SEE_SENSE 				= 0x80,

	/* task attribute */
	TASK_ATTRIBUTE_SIMPLE			= 0x0,
	TASK_ATTRIBUTE_HEADOFQUEUE		= 0x1,
	TASK_ATTRIBUTE_ORDERED			= 0x2,
	TASK_ATTRIBUTE_ACA			= 0x4,

	/* request count, etc. */
	MU_MAX_REQUEST				= 32,

	/* one message wasted, use MU_MAX_REQUEST+1
		to handle MU_MAX_REQUEST messages */
	MU_REQ_COUNT				= (MU_MAX_REQUEST + 1),
	MU_STATUS_COUNT				= (MU_MAX_REQUEST + 1),

	STEX_CDB_LENGTH				= MAX_COMMAND_SIZE,
	REQ_VARIABLE_LEN			= 1024,
	STATUS_VAR_LEN				= 128,
	ST_CAN_QUEUE				= MU_MAX_REQUEST,
	ST_CMD_PER_LUN				= MU_MAX_REQUEST,
	ST_MAX_SG				=