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, 4942 insertions, 0 deletions

diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c
new file mode 100644
index 00000000000..cca41cf8d3e
--- /dev/null
+++ b/drivers/scsi/dc395x.c
@@ -0,0 +1,4942 @@
+/*
+ * dc395x.c
+ *
+ * Device Driver for Tekram DC395(U/UW/F), DC315(U)
+ * PCI SCSI Bus Master Host Adapter
+ * (SCSI chip set used Tekram ASIC TRM-S1040)
+ *
+ * Authors:
+ *  C.L. Huang <ching@tekram.com.tw>
+ *  Erich Chen <erich@tekram.com.tw>
+ *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
+ *
+ *  Kurt Garloff <garloff@suse.de>
+ *  (C) 1999-2000 Kurt Garloff
+ *
+ *  Oliver Neukum <oliver@neukum.name>
+ *  Ali Akcaagac <aliakc@web.de>
+ *  Jamie Lenehan <lenehan@twibble.org>
+ *  (C) 2003
+ *
+ * License: GNU GPL
+ *
+ *************************************************************************
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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 OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/delay.h>
+#include <linux/ctype.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/vmalloc.h>
+#include <asm/io.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsicam.h>	/* needed for scsicam_bios_param */
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include "dc395x.h"
+
+#define DC395X_NAME	"dc395x"
+#define DC395X_BANNER	"Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
+#define DC395X_VERSION	"v2.05, 2004/03/08"
+
+/*---------------------------------------------------------------------------
+                                  Features
+ ---------------------------------------------------------------------------*/
+/*
+ * Set to disable parts of the driver
+ */
+/*#define DC395x_NO_DISCONNECT*/
+/*#define DC395x_NO_TAGQ*/
+/*#define DC395x_NO_SYNC*/
+/*#define DC395x_NO_WIDE*/
+
+/*---------------------------------------------------------------------------
+                                  Debugging
+ ---------------------------------------------------------------------------*/
+/*
+ * Types of debugging that can be enabled and disabled
+ */
+#define DBG_KG		0x0001
+#define DBG_0		0x0002
+#define DBG_1		0x0004
+#define DBG_SG		0x0020
+#define DBG_FIFO	0x0040
+#define DBG_PIO		0x0080
+
+
+/*
+ * Set set of things to output debugging for.
+ * Undefine to remove all debugging
+ */
+/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
+/*#define  DEBUG_MASK	DBG_0*/
+
+
+/*
+ * Output a kernel mesage at the specified level and append the
+ * driver name and a ": " to the start of the message
+ */
+#define dprintkl(level, format, arg...)  \
+    printk(level DC395X_NAME ": " format , ## arg)
+
+
+#ifdef DEBUG_MASK
+/*
+ * print a debug message - this is formated with KERN_DEBUG, then the
+ * driver name followed by a ": " and then the message is output. 
+ * This also checks that the specified debug level is enabled before
+ * outputing the message
+ */
+#define dprintkdbg(type, format, arg...) \
+	do { \
+		if ((type) & (DEBUG_MASK)) \
+			dprintkl(KERN_DEBUG , format , ## arg); \
+	} while (0)
+
+/*
+ * Check if the specified type of debugging is enabled
+ */
+#define debug_enabled(type)	((DEBUG_MASK) & (type))
+
+#else
+/*
+ * No debugging. Do nothing
+ */
+#define dprintkdbg(type, format, arg...) \
+	do {} while (0)
+#define debug_enabled(type)	(0)
+
+#endif
+
+
+#ifndef PCI_VENDOR_ID_TEKRAM
+#define PCI_VENDOR_ID_TEKRAM                    0x1DE1	/* Vendor ID    */
+#endif
+#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
+#define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391	/* Device ID    */
+#endif
+
+
+#define DC395x_LOCK_IO(dev,flags)		spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
+#define DC395x_UNLOCK_IO(dev,flags)		spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
+
+#define DC395x_read8(acb,address)		(u8)(inb(acb->io_port_base + (address)))
+#define DC395x_read16(acb,address)		(u16)(inw(acb->io_port_base + (address)))
+#define DC395x_read32(acb,address)		(u32)(inl(acb->io_port_base + (address)))
+#define DC395x_write8(acb,address,value)	outb((value), acb->io_port_base + (address))
+#define DC395x_write16(acb,address,value)	outw((value), acb->io_port_base + (address))
+#define DC395x_write32(acb,address,value)	outl((value), acb->io_port_base + (address))
+
+/* cmd->result */
+#define RES_TARGET		0x000000FF	/* Target State */
+#define RES_TARGET_LNX  STATUS_MASK	/* Only official ... */
+#define RES_ENDMSG		0x0000FF00	/* End Message */
+#define RES_DID			0x00FF0000	/* DID_ codes */
+#define RES_DRV			0xFF000000	/* DRIVER_ codes */
+
+#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
+#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
+
+#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
+#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
+#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
+#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
+#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
+
+#define TAG_NONE 255
+
+/*
+ * srb->segement_x is the hw sg list. It is always allocated as a
+ * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
+ * cross a page boundy.
+ */
+#define SEGMENTX_LEN	(sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
+#define VIRTX_LEN	(sizeof(void *) * DC395x_MAX_SG_LISTENTRY)
+
+struct SGentry {
+	u32 address;		/* bus! address */
+	u32 length;
+};
+
+/* The SEEPROM structure for TRM_S1040 */
+struct NVRamTarget {
+	u8 cfg0;		/* Target configuration byte 0  */
+	u8 period;		/* Target period                */
+	u8 cfg2;		/* Target configuration byte 2  */
+	u8 cfg3;		/* Target configuration byte 3  */
+};
+
+struct NvRamType {
+	u8 sub_vendor_id[2];	/* 0,1  Sub Vendor ID   */
+	u8 sub_sys_id[2];	/* 2,3  Sub System ID   */
+	u8 sub_class;		/* 4    Sub Class       */
+	u8 vendor_id[2];	/* 5,6  Vendor ID       */
+	u8 device_id[2];	/* 7,8  Device ID       */
+	u8 reserved;		/* 9    Reserved        */
+	struct NVRamTarget target[DC395x_MAX_SCSI_ID];
+						/** 10,11,12,13
+						 ** 14,15,16,17
+						 ** ....
+						 ** ....
+						 ** 70,71,72,73
+						 */
+	u8 scsi_id;		/* 74 Host Adapter SCSI ID      */
+	u8 channel_cfg;		/* 75 Channel configuration     */
+	u8 delay_time;		/* 76 Power on delay time       */
+	u8 max_tag;		/* 77 Maximum tags              */
+	u8 reserved0;		/* 78  */
+	u8 boot_target;		/* 79  */
+	u8 boot_lun;		/* 80  */
+	u8 reserved1;		/* 81  */
+	u16 reserved2[22];	/* 82,..125 */
+	u16 cksum;		/* 126,127 */
+};
+
+struct ScsiReqBlk {
+	struct list_head list;		/* next/prev ptrs for srb lists */
+	struct DeviceCtlBlk *dcb;
+	struct scsi_cmnd *cmd;
+
+	struct SGentry *segment_x;	/* Linear array of hw sg entries (up to 64 entries) */
+	u32 sg_bus_addr;	        /* Bus address of sg list (ie, of segment_x) */
+
+	u8 sg_count;			/* No of HW sg entries for this request */
+	u8 sg_index;			/* Index of HW sg entry for this request */
+	u32 total_xfer_length;		/* Total number of bytes remaining to be transfered */
+	void **virt_map;
+	unsigned char *virt_addr;	/* Virtual address of current transfer position */
+
+	/*
+	 * The sense buffer handling function, request_sense, uses
+	 * the first hw sg entry (segment_x[0]) and the transfer
+	 * length (total_xfer_length). While doing this it stores the
+	 * original values into the last sg hw list
+	 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
+	 * total_xfer_length in xferred. These values are restored in
+	 * pci_unmap_srb_sense. This is the only place xferred is used.
+	 */
+	u32 xferred;		        /* Saved copy of total_xfer_length */
+
+	u16 state;
+
+	u8 msgin_buf[6];
+	u8 msgout_buf[6];
+
+	u8 adapter_status;
+	u8 target_status;
+	u8 msg_count;
+	u8 end_message;
+
+	u8 tag_number;
+	u8 status;
+	u8 retry_count;
+	u8 flag;
+
+	u8 scsi_phase;
+};
+
+struct DeviceCtlBlk {
+	struct list_head list;		/* next/prev ptrs for the dcb list */
+	struct AdapterCtlBlk *acb;
+	struct list_head srb_going_list;	/* head of going srb list */
+	struct list_head srb_waiting_list;	/* head of waiting srb list */
+
+	struct ScsiReqBlk *active_srb;
+	u32 tag_mask;
+
+	u16 max_command;
+
+	u8 target_id;		/* SCSI Target ID  (SCSI Only) */
+	u8 target_lun;		/* SCSI Log.  Unit (SCSI Only) */
+	u8 identify_msg;
+	u8 dev_mode;
+
+	u8 inquiry7;		/* To store Inquiry flags */
+	u8 sync_mode;		/* 0:async mode */
+	u8 min_nego_period;	/* for nego. */
+	u8 sync_period;		/* for reg.  */
+
+	u8 sync_offset;		/* for reg. and nego.(low nibble) */
+	u8 flag;
+	u8 dev_type;
+	u8 init_tcq_flag;
+};
+
+struct AdapterCtlBlk {
+	struct Scsi_Host *scsi_host;
+
+	unsigned long io_port_base;
+	unsigned long io_port_len;
+
+	struct list_head dcb_list;		/* head of going dcb list */
+	struct DeviceCtlBlk *dcb_run_robin;
+	struct DeviceCtlBlk *active_dcb;
+
+	struct list_head srb_free_list;		/* head of free srb list */
+	struct ScsiReqBlk *tmp_srb;
+	struct timer_list waiting_timer;
+	struct timer_list selto_timer;
+
+	u16 srb_count;
+
+	u8 sel_timeout;
+
+	unsigned int irq_level;
+	u8 tag_max_num;
+	u8 acb_flag;
+	u8 gmode2;
+
+	u8 config;
+	u8 lun_chk;
+	u8 scan_devices;
+	u8 hostid_bit;
+
+	u8 dcb_map[DC395x_MAX_SCSI_ID];
+	struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
+
+	struct pci_dev *dev;
+
+	u8 msg_len;
+
+	struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
+	struct ScsiReqBlk srb;
+
+	struct NvRamType eeprom;	/* eeprom settings for this adapter */
+};
+
+
+/*---------------------------------------------------------------------------
+                            Forward declarations
+ ---------------------------------------------------------------------------*/
+static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
+		u16 *pscsi_status);
+static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 
+		u16 *pscsi_status);
+static void set_basic_config(struct AdapterCtlBlk *acb);
+static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
+		struct ScsiReqBlk *srb);
+static void reset_scsi_bus(struct AdapterCtlBlk *acb);
+static void data_io_transfer(struct AdapterCtlBlk *acb,
+		struct ScsiReqBlk *srb, u16 io_dir);
+static void disconnect(struct AdapterCtlBlk *acb);
+static void reselect(struct AdapterCtlBlk *acb);
+static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb);
+static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
+		struct ScsiReqBlk *srb);
+static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb);
+static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
+		struct scsi_cmnd *cmd, u8 force);
+static void scsi_reset_detect(struct AdapterCtlBlk *acb);
+static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
+static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
+		struct ScsiReqBlk *srb);
+static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb);
+static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb);
+static void set_xfer_rate(struct AdapterCtlBlk *acb,
+		struct DeviceCtlBlk *dcb);
+static void waiting_timeout(unsigned long ptr);
+
+
+/*---------------------------------------------------------------------------
+                                 Static Data
+ ---------------------------------------------------------------------------*/
+static u16 current_sync_offset = 0;
+
+static void *dc395x_scsi_phase0[] = {
+	data_out_phase0,/* phase:0 */
+	data_in_phase0,	/* phase:1 */
+	command_phase0,	/* phase:2 */
+	status_phase0,	/* phase:3 */
+	nop0,		/* phase:4 PH_BUS_FREE .. initial phase */
+	nop0,		/* phase:5 PH_BUS_FREE .. initial phase */
+	msgout_phase0,	/* phase:6 */
+	msgin_phase0,	/* phase:7 */
+};
+
+static void *dc395x_scsi_phase1[] = {
+	data_out_phase1,/* phase:0 */
+	data_in_phase1,	/* phase:1 */
+	command_phase1,	/* phase:2 */
+	status_phase1,	/* phase:3 */
+	nop1,		/* phase:4 PH_BUS_FREE .. initial phase */
+	nop1,		/* phase:5 PH_BUS_FREE .. initial phase */
+	msgout_phase1,	/* phase:6 */
+	msgin_phase1,	/* phase:7 */
+};
+
+/*
+ *Fast20:	000	 50ns, 20.0 MHz
+ *		001	 75ns, 13.3 MHz
+ *		010	100ns, 10.0 MHz
+ *		011	125ns,  8.0 MHz
+ *		100	150ns,  6.6 MHz
+ *		101	175ns,  5.7 MHz
+ *		110	200ns,  5.0 MHz
+ *		111	250ns,  4.0 MHz
+ *
+ *Fast40(LVDS):	000	 25ns, 40.0 MHz
+ *		001	 50ns, 20.0 MHz
+ *		010	 75ns, 13.3 MHz
+ *		011	100ns, 10.0 MHz
+ *		100	125ns,  8.0 MHz
+ *		101	150ns,  6.6 MHz
+ *		110	175ns,  5.7 MHz
+ *		111	200ns,  5.0 MHz
+ */
+/*static u8	clock_period[] = {12,19,25,31,37,44,50,62};*/
+
+/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
+static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
+static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
+
+
+/*---------------------------------------------------------------------------
+                                Configuration
+  ---------------------------------------------------------------------------*/
+/*
+ * Module/boot parameters currently effect *all* instances of the
+ * card in the system.
+ */
+
+/*
+ * Command line parameters are stored in a structure below.
+ * These are the index's into the structure for the various
+ * command line options.
+ */
+#define CFG_ADAPTER_ID		0
+#define CFG_MAX_SPEED		1
+#define CFG_DEV_MODE		2
+#define CFG_ADAPTER_MODE	3
+#define CFG_TAGS		4
+#define CFG_RESET_DELAY		5
+
+#define CFG_NUM			6	/* number of configuration items */
+
+
+/*
+ * Value used to indicate that a command line override
+ * hasn't been used to modify the value.
+ */
+#define CFG_PARAM_UNSET -1
+
+
+/*
+ * Hold command line parameters.
+ */
+struct ParameterData {
+	int value;		/* value of this setting */
+	int min;		/* minimum value */
+	int max;		/* maximum value */
+	int def;		/* default value */
+	int safe;		/* safe value */
+};
+static struct ParameterData __devinitdata cfg_data[] = {
+	{ /* adapter id */
+		CFG_PARAM_UNSET,
+		0,
+		15,
+		7,
+		7
+	},
+	{ /* max speed */
+		CFG_PARAM_UNSET,
+		  0,
+		  7,
+		  1,	/* 13.3Mhz */
+		  4,	/*  6.7Hmz */
+	},
+	{ /* dev mode */
+		CFG_PARAM_UNSET,
+		0,
+		0x3f,
+		NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
+			NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
+			NTC_DO_SEND_START,
+		NTC_DO_PARITY_CHK | NTC_DO_SEND_START
+	},
+	{ /* adapter mode */
+		CFG_PARAM_UNSET,
+		0,
+		0x2f,
+#ifdef CONFIG_SCSI_MULTI_LUN
+			NAC_SCANLUN |
+#endif
+		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
+			/*| NAC_ACTIVE_NEG*/,
+		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
+	},
+	{ /* tags */
+		CFG_PARAM_UNSET,
+		0,
+		5,
+		3,	/* 16 tags (??) */
+		2,
+	},
+	{ /* reset delay */
+		CFG_PARAM_UNSET,
+		0,
+		180,
+		1,	/* 1 second */
+		10,	/* 10 seconds */
+	}
+};
+
+
+/*
+ * Safe settings. If set to zero the the BIOS/default values with
+ * command line overrides will be used. If set to 1 then safe and
+ * slow settings will be used.
+ */
+static int use_safe_settings = 0;
+module_param_named(safe, use_safe_settings, bool, 0);
+MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
+
+
+module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
+MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
+
+module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
+MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
+
+module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
+MODULE_PARM_DESC(dev_mode, "Device mode.");
+
+module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
+MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
+
+module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
+MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
+
+module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
+MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
+
+
+/**
+ * set_safe_settings - if the use_safe_settings option is set then
+ * set all values to the safe and slow values.
+ **/
+static void __devinit set_safe_settings(void)
+{
+	if (use_safe_settings)
+	{
+		int i;
+
+		dprintkl(KERN_INFO, "Using safe settings.\n");
+		for (i = 0; i < CFG_NUM; i++)
+		{
+			cfg_data[i].value = cfg_data[i].safe;
+		}
+	}
+}
+
+
+/**
+ * fix_settings - reset any boot parameters which are out of range
+ * back to the default values.
+ **/
+static void __devinit fix_settings(void)
+{
+	int i;
+
+	dprintkdbg(DBG_1,
+		"setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
+		"AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
+		cfg_data[CFG_ADAPTER_ID].value,
+		cfg_data[CFG_MAX_SPEED].value,
+		cfg_data[CFG_DEV_MODE].value,
+		cfg_data[CFG_ADAPTER_MODE].value,
+		cfg_data[CFG_TAGS].value,
+		cfg_data[CFG_RESET_DELAY].value);
+	for (i = 0; i < CFG_NUM; i++)
+	{
+		if (cfg_data[i].value < cfg_data[i].min
+		    || cfg_data[i].value > cfg_data[i].max)
+			cfg_data[i].value = cfg_data[i].def;
+	}
+}
+
+
+
+/*
+ * Mapping from the eeprom delay index value (index into this array)
+ * to the the number of actual seconds that the delay should be for.
+ */
+static char __devinitdata eeprom_index_to_delay_map[] = 
+	{ 1, 3, 5, 10, 16, 30, 60, 120 };
+
+
+/**
+ * eeprom_index_to_delay - Take the eeprom delay setting and convert it
+ * into a number of seconds.
+ *
+ * @eeprom: The eeprom structure in which we find the delay index to map.
+ **/
+static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
+{
+	eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
+}
+
+
+/**
+ * delay_to_eeprom_index - Take a delay in seconds and return the
+ * closest eeprom index which will delay for at least that amount of
+ * seconds.
+ *
+ * @delay: The delay, in seconds, to find the eeprom index for.
+ **/
+static int __devinit delay_to_eeprom_index(int delay)
+{
+	u8 idx = 0;
+	while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
+		idx++;
+	return idx;
+}
+
+
+/**
+ * eeprom_override - Override the eeprom settings, in the provided
+ * eeprom structure, with values that have been set on the command
+ * line.
+ *
+ * @eeprom: The eeprom data to override with command line options.
+ **/
+static void __devinit eeprom_override(struct NvRamType *eeprom)
+{
+	u8 id;
+
+	/* Adapter Settings */
+	if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
+		eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
+
+	if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
+		eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
+
+	if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
+		eeprom->delay_time = delay_to_eeprom_index(
+					cfg_data[CFG_RESET_DELAY].value);
+
+	if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
+		eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
+
+	/* Device Settings */
+	for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
+		if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
+			eeprom->target[id].cfg0 =
+				(u8)cfg_data[CFG_DEV_MODE].value;
+
+		if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
+			eeprom->target[id].period =
+				(u8)cfg_data[CFG_MAX_SPEED].value;
+
+	}
+}
+
+
+/*---------------------------------------------------------------------------
+ ---------------------------------------------------------------------------*/
+
+static unsigned int list_size(struct list_head *head)
+{
+	unsigned int count = 0;
+	struct list_head *pos;
+	list_for_each(pos, head)
+		count++;
+	return count;
+}
+
+
+static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
+		struct DeviceCtlBlk *pos)
+{
+	int use_next = 0;
+	struct DeviceCtlBlk* next = NULL;
+	struct DeviceCtlBlk* i;
+
+	if (list_empty(head))
+		return NULL;
+
+	/* find supplied dcb and then select the next one */
+	list_for_each_entry(i, head, list)
+		if (use_next) {
+			next = i;
+			break;
+		} else if (i == pos) {
+			use_next = 1;
+		}
+	/* if no next one take the head one (ie, wraparound) */
+	if (!next)
+        	list_for_each_entry(i, head, list) {
+        		next = i;
+        		break;
+        	}
+
+	return next;
+}
+
+
+static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
+{
+	if (srb->tag_number < 255) {
+		dcb->tag_mask &= ~(1 << srb->tag_number);	/* free tag mask */
+		srb->tag_number = 255;
+	}
+}
+
+
+/* Find cmd in SRB list */
+inline static struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, 
+		struct list_head *head)
+{
+	struct ScsiReqBlk *i;
+	list_for_each_entry(i, head, list)
+		if (i->cmd == cmd)
+			return i;
+	return NULL;
+}
+
+
+static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
+{
+	struct list_head *head = &acb->srb_free_list;
+	struct ScsiReqBlk *srb = NULL;
+
+	if (!list_empty(head)) {
+		srb = list_entry(head->next, struct ScsiReqBlk, list);
+		list_del(head->next);
+		dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
+	}
+	return srb;
+}
+
+
+static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
+{
+	dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
+	list_add_tail(&srb->list, &acb->srb_free_list);
+}
+
+
+static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb)
+{
+	dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
+		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
+	list_add(&srb->list, &dcb->srb_waiting_list);
+}
+
+
+static void srb_waiting_append(struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb)
+{
+	dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
+		 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
+	list_add_tail(&srb->list, &dcb->srb_waiting_list);
+}
+
+
+static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
+{
+	dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
+		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
+	list_add_tail(&srb->list, &dcb->srb_going_list);
+}
+
+
+static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
+{
+	struct ScsiReqBlk *i;
+	struct ScsiReqBlk *tmp;
+	dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
+		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
+
+	list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
+		if (i == srb) {
+			list_del(&srb->list);
+			break;
+		}
+}
+
+
+static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb)
+{
+	struct ScsiReqBlk *i;
+	struct ScsiReqBlk *tmp;
+	dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
+		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
+
+	list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
+		if (i == srb) {
+			list_del(&srb->list);
+			break;
+		}
+}
+
+
+static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb)
+{
+	dprintkdbg(DBG_0,
+		"srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
+		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
+	list_move(&srb->list, &dcb->srb_waiting_list);
+}
+
+
+static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb)
+{
+	dprintkdbg(DBG_0,
+		"srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
+		srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
+	list_move(&srb->list, &dcb->srb_going_list);
+}
+
+
+/* Sets the timer to wake us up */
+static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
+{
+	if (timer_pending(&acb->waiting_timer))
+		return;
+	init_timer(&acb->waiting_timer);
+	acb->waiting_timer.function = waiting_timeout;
+	acb->waiting_timer.data = (unsigned long) acb;
+	if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
+		acb->waiting_timer.expires =
+		    acb->scsi_host->last_reset - HZ / 2 + 1;
+	else
+		acb->waiting_timer.expires = jiffies + to + 1;
+	add_timer(&acb->waiting_timer);
+}
+
+
+/* Send the next command from the waiting list to the bus */
+static void waiting_process_next(struct AdapterCtlBlk *acb)
+{
+	struct DeviceCtlBlk *start = NULL;
+	struct DeviceCtlBlk *pos;
+	struct DeviceCtlBlk *dcb;
+	struct ScsiReqBlk *srb;
+	struct list_head *dcb_list_head = &acb->dcb_list;
+
+	if (acb->active_dcb
+	    || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
+		return;
+
+	if (timer_pending(&acb->waiting_timer))
+		del_timer(&acb->waiting_timer);
+
+	if (list_empty(dcb_list_head))
+		return;
+
+	/*
+	 * Find the starting dcb. Need to find it again in the list
+	 * since the list may have changed since we set the ptr to it
+	 */
+	list_for_each_entry(dcb, dcb_list_head, list)
+		if (dcb == acb->dcb_run_robin) {
+			start = dcb;
+			break;
+		}
+	if (!start) {
+		/* This can happen! */
+		start = list_entry(dcb_list_head->next, typeof(*start), list);
+		acb->dcb_run_robin = start;
+	}
+
+
+	/*
+	 * Loop over the dcb, but we start somewhere (potentially) in
+	 * the middle of the loop so we need to manully do this.
+	 */
+	pos = start;
+	do {
+		struct list_head *waiting_list_head = &pos->srb_waiting_list;
+
+		/* Make sure, the next another device gets scheduled ... */
+		acb->dcb_run_robin = dcb_get_next(dcb_list_head,
+						  acb->dcb_run_robin);
+
+		if (list_empty(waiting_list_head) ||
+		    pos->max_command <= list_size(&pos->srb_going_list)) {
+			/* move to next dcb */
+			pos = dcb_get_next(dcb_list_head, pos);
+		} else {
+			srb = list_entry(waiting_list_head->next,
+					 struct ScsiReqBlk, list);
+
+			/* Try to send to the bus */
+			if (!start_scsi(acb, pos, srb))
+				srb_waiting_to_going_move(pos, srb);
+			else
+				waiting_set_timer(acb, HZ/50);
+			break;
+		}
+	} while (pos != start);
+}
+
+
+/* Wake up waiting queue */
+static void waiting_timeout(unsigned long ptr)
+{
+	unsigned long flags;
+	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
+	dprintkdbg(DBG_1,
+		"waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
+	DC395x_LOCK_IO(acb->scsi_host, flags);
+	waiting_process_next(acb);
+	DC395x_UNLOCK_IO(acb->scsi_host, flags);
+}
+
+
+/* Get the DCB for a given ID/LUN combination */
+static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
+{
+	return acb->children[id][lun];
+}
+
+
+/* Send SCSI Request Block (srb) to adapter (acb) */
+static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
+{
+	struct DeviceCtlBlk *dcb = srb->dcb;
+
+	if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
+	    acb->active_dcb ||
+	    (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
+		srb_waiting_append(dcb, srb);
+		waiting_process_next(acb);
+		return;
+	}
+
+	if (!start_scsi(acb, dcb, srb))
+		srb_going_append(dcb, srb);
+	else {
+		srb_waiting_insert(dcb, srb);
+		waiting_set_timer(acb, HZ / 50);
+	}
+}
+
+
+/* Prepare SRB for being sent to Device DCB w/ command *cmd */
+static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
+		struct ScsiReqBlk *srb)
+{
+	enum dma_data_direction dir = cmd->sc_data_direction;
+	dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
+		cmd->pid, dcb->target_id, dcb->target_lun);
+
+	srb->dcb = dcb;
+	srb->cmd = cmd;
+	srb->sg_count = 0;
+	srb->total_xfer_length = 0;
+	srb->sg_bus_addr = 0;
+	srb->virt_addr = NULL;
+	srb->sg_index = 0;
+	srb->adapter_status = 0;
+	srb->target_status = 0;
+	srb->msg_count = 0;
+	srb->status = 0;
+	srb->flag = 0;
+	srb->state = 0;
+	srb->retry_count = 0;
+	srb->tag_number = TAG_NONE;
+	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
+	srb->end_message = 0;
+
+	if (dir == PCI_DMA_NONE || !cmd->request_buffer) {
+		dprintkdbg(DBG_0,
+			"build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
+			cmd->bufflen, cmd->request_buffer,
+			cmd->use_sg, srb->segment_x[0].address);
+	} else if (cmd->use_sg) {
+		int i;
+		u32 reqlen = cmd->request_bufflen;
+		struct scatterlist *sl = (struct scatterlist *)
+					 cmd->request_buffer;
+		struct SGentry *sgp = srb->segment_x;
+		srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg,
+					   dir);
+		dprintkdbg(DBG_0,
+			"build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
+			reqlen, cmd->request_buffer, cmd->use_sg,
+			srb->sg_count);
+
+		for (i = 0; i < srb->sg_count; i++) {
+			u32 seglen = (u32)sg_dma_len(sl + i);
+			sgp[i].address = (u32)sg_dma_address(sl + i);
+			sgp[i].length = seglen;
+			srb->total_xfer_length += seglen;
+			srb->virt_map[i] = kmap(sl[i].page);
+		}
+		srb->virt_addr = srb->virt_map[0];
+		sgp += srb->sg_count - 1;
+
+		/*
+		 * adjust last page if too big as it is allocated
+		 * on even page boundaries
+		 */
+		if (srb->total_xfer_length > reqlen) {
+			sgp->length -= (srb->total_xfer_length - reqlen);
+			srb->total_xfer_length = reqlen;
+		}
+
+		/* Fixup for WIDE padding - make sure length is even */
+		if (dcb->sync_period & WIDE_SYNC &&
+		    srb->total_xfer_length % 2) {
+			srb->total_xfer_length++;
+			sgp->length++;
+		}
+
+		srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
+						srb->segment_x,
+				            	SEGMENTX_LEN,
+				            	PCI_DMA_TODEVICE);
+
+		dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
+			srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
+	} else {
+		srb->total_xfer_length = cmd->request_bufflen;
+		srb->sg_count = 1;
+		srb->segment_x[0].address =
+			pci_map_single(dcb->acb->dev, cmd->request_buffer,
+				       srb->total_xfer_length, dir);
+
+		/* Fixup for WIDE padding - make sure length is even */
+		if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2)
+			srb->total_xfer_length++;
+
+		srb->segment_x[0].length = srb->total_xfer_length;
+		srb->virt_addr = cmd->request_buffer;
+		dprintkdbg(DBG_0,
+			"build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n",
+			srb->total_xfer_length, cmd->request_buffer,
+			cmd->use_sg, srb->segment_x[0].address);
+	}
+}
+
+
+/**
+ * dc395x_queue_command - queue scsi command passed from the mid
+ * layer, invoke 'done' on completion
+ *
+ * @cmd: pointer to scsi command object
+ * @done: function pointer to be invoked on completion
+ *
+ * Returns 1 if the adapter (host) is busy, else returns 0. One
+ * reason for an adapter to be busy is that the number
+ * of outstanding queued commands is already equal to
+ * struct Scsi_Host::can_queue .
+ *
+ * Required: if struct Scsi_Host::can_queue is ever non-zero
+ *           then this function is required.
+ *
+ * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
+ *        and is expected to be held on return.
+ *
+ **/
+static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
+{
+	struct DeviceCtlBlk *dcb;