qla1280.c

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/******************************************************************************
*                  QLOGIC LINUX SOFTWARE
*
* QLogic  QLA1280 (Ultra2)  and  QLA12160 (Ultra3) SCSI driver
* Copyright (C) 2000 Qlogic Corporation (www.qlogic.com)
* Copyright (C) 2001-2004 Jes Sorensen, Wild Open Source Inc.
* Copyright (C) 2003-2004 Christoph Hellwig
*
* 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, 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.
*
******************************************************************************/
#define QLA1280_VERSION      "3.27.1"
/*****************************************************************************
    Revision History:
    Rev  3.27.1, February 8, 2010, Michael Reed
    - Retain firmware image for error recovery.
    Rev  3.27, February 10, 2009, Michael Reed
    - General code cleanup.
    - Improve error recovery.
    Rev  3.26, January 16, 2006 Jes Sorensen
    - Ditch all < 2.6 support
    Rev  3.25.1, February 10, 2005 Christoph Hellwig
    - use pci_map_single to map non-S/G requests
    - remove qla1280_proc_info
    Rev  3.25, September 28, 2004, Christoph Hellwig
    - add support for ISP1020/1040
    - don't include "scsi.h" anymore for 2.6.x
    Rev  3.24.4 June 7, 2004 Christoph Hellwig
    - restructure firmware loading, cleanup initialization code
    - prepare support for ISP1020/1040 chips
    Rev  3.24.3 January 19, 2004, Jes Sorensen
    - Handle PCI DMA mask settings correctly
    - Correct order of error handling in probe_one, free_irq should not
      be called if request_irq failed
    Rev  3.24.2 January 19, 2004, James Bottomley & Andrew Vasquez
    - Big endian fixes (James)
    - Remove bogus IOCB content on zero data transfer commands (Andrew)
    Rev  3.24.1 January 5, 2004, Jes Sorensen
    - Initialize completion queue to avoid OOPS on probe
    - Handle interrupts during mailbox testing
    Rev  3.24 November 17, 2003, Christoph Hellwig
        - use struct list_head for completion queue
    - avoid old Scsi_FOO typedefs
    - cleanup 2.4 compat glue a bit
    - use <scsi/scsi_*.h> headers on 2.6 instead of "scsi.h"
    - make initialization for memory mapped vs port I/O more similar
    - remove broken pci config space manipulation
    - kill more cruft
    - this is an almost perfect 2.6 scsi driver now! ;)
    Rev  3.23.39 December 17, 2003, Jes Sorensen
    - Delete completion queue from srb if mailbox command failed to
      to avoid qla1280_done completeting qla1280_error_action's
      obsolete context
    - Reduce arguments for qla1280_done
    Rev  3.23.38 October 18, 2003, Christoph Hellwig
    - Convert to new-style hotplugable driver for 2.6
    - Fix missing scsi_unregister/scsi_host_put on HBA removal
    - Kill some more cruft
    Rev  3.23.37 October 1, 2003, Jes Sorensen
    - Make MMIO depend on CONFIG_X86_VISWS instead of yet another
      random CONFIG option
    - Clean up locking in probe path
    Rev  3.23.36 October 1, 2003, Christoph Hellwig
    - queuecommand only ever receives new commands - clear flags
    - Reintegrate lost fixes from Linux 2.5
    Rev  3.23.35 August 14, 2003, Jes Sorensen
    - Build against 2.6
    Rev  3.23.34 July 23, 2003, Jes Sorensen
    - Remove pointless TRUE/FALSE macros
    - Clean up vchan handling
    Rev  3.23.33 July 3, 2003, Jes Sorensen
    - Don't define register access macros before define determining MMIO.
      This just happened to work out on ia64 but not elsewhere.
    - Don't try and read from the card while it is in reset as
      it won't respond and causes an MCA
    Rev  3.23.32 June 23, 2003, Jes Sorensen
    - Basic support for boot time arguments
    Rev  3.23.31 June 8, 2003, Jes Sorensen
    - Reduce boot time messages
    Rev  3.23.30 June 6, 2003, Jes Sorensen
    - Do not enable sync/wide/ppr before it has been determined
      that the target device actually supports it
    - Enable DMA arbitration for multi channel controllers
    Rev  3.23.29 June 3, 2003, Jes Sorensen
    - Port to 2.5.69
    Rev  3.23.28 June 3, 2003, Jes Sorensen
    - Eliminate duplicate marker commands on bus resets
    - Handle outstanding commands appropriately on bus/device resets
    Rev  3.23.27 May 28, 2003, Jes Sorensen
    - Remove bogus input queue code, let the Linux SCSI layer do the work
    - Clean up NVRAM handling, only read it once from the card
    - Add a number of missing default nvram parameters
    Rev  3.23.26 Beta May 28, 2003, Jes Sorensen
    - Use completion queue for mailbox commands instead of busy wait
    Rev  3.23.25 Beta May 27, 2003, James Bottomley
    - Migrate to use new error handling code
    Rev  3.23.24 Beta May 21, 2003, James Bottomley
    - Big endian support
    - Cleanup data direction code
    Rev  3.23.23 Beta May 12, 2003, Jes Sorensen
    - Switch to using MMIO instead of PIO
    Rev  3.23.22 Beta April 15, 2003, Jes Sorensen
    - Fix PCI parity problem with 12160 during reset.
    Rev  3.23.21 Beta April 14, 2003, Jes Sorensen
    - Use pci_map_page()/pci_unmap_page() instead of map_single version.
    Rev  3.23.20 Beta April 9, 2003, Jes Sorensen
    - Remove < 2.4.x support
    - Introduce HOST_LOCK to make the spin lock changes portable.
    - Remove a bunch of idiotic and unnecessary typedef's
    - Kill all leftovers of target-mode support which never worked anyway
    Rev  3.23.19 Beta April 11, 2002, Linus Torvalds
    - Do qla1280_pci_config() before calling request_irq() and
      request_region()
    - Use pci_dma_hi32() to handle upper word of DMA addresses instead
      of large shifts
    - Hand correct arguments to free_irq() in case of failure
    Rev  3.23.18 Beta April 11, 2002, Jes Sorensen
    - Run source through Lindent and clean up the output
    Rev  3.23.17 Beta April 11, 2002, Jes Sorensen
    - Update SCSI firmware to qla1280 v8.15.00 and qla12160 v10.04.32
    Rev  3.23.16 Beta March 19, 2002, Jes Sorensen
    - Rely on mailbox commands generating interrupts - do not
      run qla1280_isr() from ql1280_mailbox_command()
    - Remove device_reg_t
    - Integrate ql12160_set_target_parameters() with 1280 version
    - Make qla1280_setup() non static
    - Do not call qla1280_check_for_dead_scsi_bus() on every I/O request
      sent to the card - this command pauses the firmware!!!
    Rev  3.23.15 Beta March 19, 2002, Jes Sorensen
    - Clean up qla1280.h - remove obsolete QL_DEBUG_LEVEL_x definitions
    - Remove a pile of pointless and confusing (srb_t **) and
      (scsi_lu_t *) typecasts
    - Explicit mark that we do not use the new error handling (for now)
    - Remove scsi_qla_host_t and use 'struct' instead
    - Remove in_abort, watchdog_enabled, dpc, dpc_sched, bios_enabled,
      pci_64bit_slot flags which weren't used for anything anyway
    - Grab host->host_lock while calling qla1280_isr() from abort()
    - Use spin_lock()/spin_unlock() in qla1280_intr_handler() - we
      do not need to save/restore flags in the interrupt handler
    - Enable interrupts early (before any mailbox access) in preparation
      for cleaning up the mailbox handling
    Rev  3.23.14 Beta March 14, 2002, Jes Sorensen
    - Further cleanups. Remove all trace of QL_DEBUG_LEVEL_x and replace
      it with proper use of dprintk().
    - Make qla1280_print_scsi_cmd() and qla1280_dump_buffer() both take
      a debug level argument to determine if data is to be printed
    - Add KERN_* info to printk()
    Rev  3.23.13 Beta March 14, 2002, Jes Sorensen
    - Significant cosmetic cleanups
    - Change debug code to use dprintk() and remove #if mess
    Rev  3.23.12 Beta March 13, 2002, Jes Sorensen
    - More cosmetic cleanups, fix places treating return as function
    - use cpu_relax() in qla1280_debounce_register()
    Rev  3.23.11 Beta March 13, 2002, Jes Sorensen
    - Make it compile under 2.5.5
    Rev  3.23.10 Beta October 1, 2001, Jes Sorensen
    - Do no typecast short * to long * in QL1280BoardTbl, this
      broke miserably on big endian boxes
    Rev  3.23.9 Beta September 30, 2001, Jes Sorensen
    - Remove pre 2.2 hack for checking for reentrance in interrupt handler
    - Make data types used to receive from SCSI_{BUS,TCN,LUN}_32
      unsigned int to match the types from struct scsi_cmnd
    Rev  3.23.8 Beta September 29, 2001, Jes Sorensen
    - Remove bogus timer_t typedef from qla1280.h
    - Remove obsolete pre 2.2 PCI setup code, use proper #define's
      for PCI_ values, call pci_set_master()
    - Fix memleak of qla1280_buffer on module unload
    - Only compile module parsing code #ifdef MODULE - should be
      changed to use individual MODULE_PARM's later
    - Remove dummy_buffer that was never modified nor printed
    - ENTER()/LEAVE() are noops unless QL_DEBUG_LEVEL_3, hence remove
      #ifdef QL_DEBUG_LEVEL_3/#endif around ENTER()/LEAVE() calls
    - Remove \r from print statements, this is Linux, not DOS
    - Remove obsolete QLA1280_{SCSILU,INTR,RING}_{LOCK,UNLOCK}
      dummy macros
    - Remove C++ compile hack in header file as Linux driver are not
      supposed to be compiled as C++
    - Kill MS_64BITS macro as it makes the code more readable
    - Remove unnecessary flags.in_interrupts bit
    Rev  3.23.7 Beta August 20, 2001, Jes Sorensen
    - Dont' check for set flags on q->q_flag one by one in qla1280_next()
        - Check whether the interrupt was generated by the QLA1280 before
          doing any processing
    - qla1280_status_entry(): Only zero out part of sense_buffer that
      is not being copied into
    - Remove more superflouous typecasts
    - qla1280_32bit_start_scsi() replace home-brew memcpy() with memcpy()
    Rev  3.23.6 Beta August 20, 2001, Tony Luck, Intel
        - Don't walk the entire list in qla1280_putq_t() just to directly
      grab the pointer to the last element afterwards
    Rev  3.23.5 Beta August 9, 2001, Jes Sorensen
    - Don't use IRQF_DISABLED, it's use is deprecated for this kinda driver
    Rev  3.23.4 Beta August 8, 2001, Jes Sorensen
    - Set dev->max_sectors to 1024
    Rev  3.23.3 Beta August 6, 2001, Jes Sorensen
    - Provide compat macros for pci_enable_device(), pci_find_subsys()
      and scsi_set_pci_device()
    - Call scsi_set_pci_device() for all devices
    - Reduce size of kernel version dependent device probe code
    - Move duplicate probe/init code to separate function
    - Handle error if qla1280_mem_alloc() fails
    - Kill OFFSET() macro and use Linux's PCI definitions instead
        - Kill private structure defining PCI config space (struct config_reg)
    - Only allocate I/O port region if not in MMIO mode
    - Remove duplicate (unused) sanity check of sife of srb_t
    Rev  3.23.2 Beta August 6, 2001, Jes Sorensen
    - Change home-brew memset() implementations to use memset()
        - Remove all references to COMTRACE() - accessing a PC's COM2 serial
          port directly is not legal under Linux.
    Rev  3.23.1 Beta April 24, 2001, Jes Sorensen
        - Remove pre 2.2 kernel support
        - clean up 64 bit DMA setting to use 2.4 API (provide backwards compat)
        - Fix MMIO access to use readl/writel instead of directly
          dereferencing pointers
        - Nuke MSDOS debugging code
        - Change true/false data types to int from uint8_t
        - Use int for counters instead of uint8_t etc.
        - Clean up size & byte order conversion macro usage
    Rev  3.23 Beta January 11, 2001 BN Qlogic
        - Added check of device_id when handling non
          QLA12160s during detect().
    Rev  3.22 Beta January 5, 2001 BN Qlogic
        - Changed queue_task() to schedule_task()
          for kernels 2.4.0 and higher.
          Note: 2.4.0-testxx kernels released prior to
                the actual 2.4.0 kernel release on January 2001
                will get compile/link errors with schedule_task().
                Please update your kernel to released 2.4.0 level,
                or comment lines in this file flagged with  3.22
                to resolve compile/link error of schedule_task().
        - Added -DCONFIG_SMP in addition to -D__SMP__
          in Makefile for 2.4.0 builds of driver as module.
    Rev  3.21 Beta January 4, 2001 BN Qlogic
        - Changed criteria of 64/32 Bit mode of HBA
          operation according to BITS_PER_LONG rather
          than HBA's NVRAM setting of >4Gig memory bit;
          so that the HBA auto-configures without the need
          to setup each system individually.
    Rev  3.20 Beta December 5, 2000 BN Qlogic
        - Added priority handling to IA-64  onboard SCSI
          ISP12160 chip for kernels greater than 2.3.18.
        - Added irqrestore for qla1280_intr_handler.
        - Enabled /proc/scsi/qla1280 interface.
        - Clear /proc/scsi/qla1280 counters in detect().
    Rev  3.19 Beta October 13, 2000 BN Qlogic
        - Declare driver_template for new kernel
          (2.4.0 and greater) scsi initialization scheme.
        - Update /proc/scsi entry for 2.3.18 kernels and
          above as qla1280
    Rev  3.18 Beta October 10, 2000 BN Qlogic
        - Changed scan order of adapters to map
          the QLA12160 followed by the QLA1280.
    Rev  3.17 Beta September 18, 2000 BN Qlogic
        - Removed warnings for 32 bit 2.4.x compiles
        - Corrected declared size for request and response
          DMA addresses that are kept in each ha
    Rev. 3.16 Beta  August 25, 2000   BN  Qlogic
        - Corrected 64 bit addressing issue on IA-64
          where the upper 32 bits were not properly
          passed to the RISC engine.
    Rev. 3.15 Beta  August 22, 2000   BN  Qlogic
        - Modified qla1280_setup_chip to properly load
          ISP firmware for greater that 4 Gig memory on IA-64
    Rev. 3.14 Beta  August 16, 2000   BN  Qlogic
        - Added setting of dma_mask to full 64 bit
          if flags.enable_64bit_addressing is set in NVRAM
    Rev. 3.13 Beta  August 16, 2000   BN  Qlogic
        - Use new PCI DMA mapping APIs for 2.4.x kernel
    Rev. 3.12       July 18, 2000    Redhat & BN Qlogic
        - Added check of pci_enable_device to detect() for 2.3.x
        - Use pci_resource_start() instead of
          pdev->resource[0].start in detect() for 2.3.x
        - Updated driver version
    Rev. 3.11       July 14, 2000    BN  Qlogic
    - Updated SCSI Firmware to following versions:
      qla1x80:   8.13.08
      qla1x160:  10.04.08
    - Updated driver version to 3.11
    Rev. 3.10    June 23, 2000   BN Qlogic
        - Added filtering of AMI SubSys Vendor ID devices
    Rev. 3.9
        - DEBUG_QLA1280 undefined and  new version  BN Qlogic
    Rev. 3.08b      May 9, 2000    MD Dell
        - Added logic to check against AMI subsystem vendor ID
    Rev. 3.08       May 4, 2000    DG  Qlogic
        - Added logic to check for PCI subsystem ID.
    Rev. 3.07       Apr 24, 2000    DG & BN  Qlogic
       - Updated SCSI Firmware to following versions:
         qla12160:   10.01.19
         qla1280:     8.09.00
    Rev. 3.06       Apr 12, 2000    DG & BN  Qlogic
       - Internal revision; not released
    Rev. 3.05       Mar 28, 2000    DG & BN  Qlogic
       - Edit correction for virt_to_bus and PROC.
    Rev. 3.04       Mar 28, 2000    DG & BN  Qlogic
       - Merge changes from ia64 port.
    Rev. 3.03       Mar 28, 2000    BN  Qlogic
       - Increase version to reflect new code drop with compile fix
         of issue with inclusion of linux/spinlock for 2.3 kernels
    Rev. 3.02       Mar 15, 2000    BN  Qlogic
       - Merge qla1280_proc_info from 2.10 code base
    Rev. 3.01       Feb 10, 2000    BN  Qlogic
       - Corrected code to compile on a 2.2.x kernel.
    Rev. 3.00       Jan 17, 2000    DG  Qlogic
       - Added 64-bit support.
    Rev. 2.07       Nov 9, 1999     DG  Qlogic
       - Added new routine to set target parameters for ISP12160.
    Rev. 2.06       Sept 10, 1999     DG  Qlogic
       - Added support for ISP12160 Ultra 3 chip.
    Rev. 2.03       August 3, 1999    Fred Lewis, Intel DuPont
    - Modified code to remove errors generated when compiling with
      Cygnus IA64 Compiler.
        - Changed conversion of pointers to unsigned longs instead of integers.
        - Changed type of I/O port variables from uint32_t to unsigned long.
        - Modified OFFSET macro to work with 64-bit as well as 32-bit.
        - Changed sprintf and printk format specifiers for pointers to %p.
        - Changed some int to long type casts where needed in sprintf & printk.
        - Added l modifiers to sprintf and printk format specifiers for longs.
        - Removed unused local variables.
    Rev. 1.20       June 8, 1999      DG,  Qlogic
         Changes to support RedHat release 6.0 (kernel 2.2.5).
       - Added SCSI exclusive access lock (io_request_lock) when accessing
         the adapter.
       - Added changes for the new LINUX interface template. Some new error
         handling routines have been added to the template, but for now we
         will use the old ones.
    -   Initial Beta Release.
*****************************************************************************/


#include <linux/module.h>

#include <linux/types.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/pci_ids.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/firmware.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <asm/processor.h>
#include <asm/types.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>

#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
#include <asm/sn/io.h>
#endif


/*
 * Compile time Options:
 *            0 - Disable and 1 - Enable
 */
#define  DEBUG_QLA1280_INTR 0
#define  DEBUG_PRINT_NVRAM  0
#define  DEBUG_QLA1280      0

/*
 * The SGI VISWS is broken and doesn't support MMIO ;-(
 */
#ifdef CONFIG_X86_VISWS
#define MEMORY_MAPPED_IO    0
#else
#define MEMORY_MAPPED_IO    1
#endif

#include "qla1280.h"

#ifndef BITS_PER_LONG
#error "BITS_PER_LONG not defined!"
#endif
#if (BITS_PER_LONG == 64) || defined CONFIG_HIGHMEM
#define QLA_64BIT_PTR   1
#endif

#ifdef QLA_64BIT_PTR
#define pci_dma_hi32(a)         ((a >> 16) >> 16)
#else
#define pci_dma_hi32(a)         0
#endif
#define pci_dma_lo32(a)         (a & 0xffffffff)

#define NVRAM_DELAY()           udelay(500) /* 2 microseconds */

#if defined(__ia64__) && !defined(ia64_platform_is)
#define ia64_platform_is(foo)       (!strcmp(x, platform_name))
#endif


#define IS_ISP1040(ha) (ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP1020)
#define IS_ISP1x40(ha) (ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP1020 || \
            ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP1240)
#define IS_ISP1x160(ha)        (ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP10160 || \
                ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP12160)


static int qla1280_probe_one(struct pci_dev *, const struct pci_device_id *);
static void qla1280_remove_one(struct pci_dev *);

/*
 *  QLogic Driver Support Function Prototypes.
 */
static void qla1280_done(struct scsi_qla_host *);
static int qla1280_get_token(char *);
static int qla1280_setup(char *s) __init;

/*
 *  QLogic ISP1280 Hardware Support Function Prototypes.
 */
static int qla1280_load_firmware(struct scsi_qla_host *);
static int qla1280_init_rings(struct scsi_qla_host *);
static int qla1280_nvram_config(struct scsi_qla_host *);
static int qla1280_mailbox_command(struct scsi_qla_host *,
                   uint8_t, uint16_t *);
static int qla1280_bus_reset(struct scsi_qla_host *, int);
static int qla1280_device_reset(struct scsi_qla_host *, int, int);
static int qla1280_abort_command(struct scsi_qla_host *, struct srb *, int);
static int qla1280_abort_isp(struct scsi_qla_host *);
#ifdef QLA_64BIT_PTR
static int qla1280_64bit_start_scsi(struct scsi_qla_host *, struct srb *);
#else
static int qla1280_32bit_start_scsi(struct scsi_qla_host *, struct srb *);
#endif
static void qla1280_nv_write(struct scsi_qla_host *, uint16_t);
static void qla1280_poll(struct scsi_qla_host *);
static void qla1280_reset_adapter(struct scsi_qla_host *);
static void qla1280_marker(struct scsi_qla_host *, int, int, int, u8);
static void qla1280_isp_cmd(struct scsi_qla_host *);
static void qla1280_isr(struct scsi_qla_host *, struct list_head *);
static void qla1280_rst_aen(struct scsi_qla_host *);
static void qla1280_status_entry(struct scsi_qla_host *, struct response *,
                 struct list_head *);
static void qla1280_error_entry(struct scsi_qla_host *, struct response *,
                struct list_head *);
static uint16_t qla1280_get_nvram_word(struct scsi_qla_host *, uint32_t);
static uint16_t qla1280_nvram_request(struct scsi_qla_host *, uint32_t);
static uint16_t qla1280_debounce_register(volatile uint16_t __iomem *);
static request_t *qla1280_req_pkt(struct scsi_qla_host *);
static int qla1280_check_for_dead_scsi_bus(struct scsi_qla_host *,
                       unsigned int);
static void qla1280_get_target_parameters(struct scsi_qla_host *,
                       struct scsi_device *);
static int qla1280_set_target_parameters(struct scsi_qla_host *, int, int);


static struct qla_driver_setup driver_setup;

/*
 * convert scsi data direction to request_t control flags
 */
static inline uint16_t
qla1280_data_direction(struct scsi_cmnd *cmnd)
{
    switch(cmnd->sc_data_direction) {
    case DMA_FROM_DEVICE:
        return BIT_5;
    case DMA_TO_DEVICE:
        return BIT_6;
    case DMA_BIDIRECTIONAL:
        return BIT_5 | BIT_6;
    /*
     * We could BUG() on default here if one of the four cases aren't
     * met, but then again if we receive something like that from the
     * SCSI layer we have more serious problems. This shuts up GCC.
     */
    case DMA_NONE:
    default:
        return 0;
    }
}
        
#if DEBUG_QLA1280
static void __qla1280_print_scsi_cmd(struct scsi_cmnd * cmd);
static void __qla1280_dump_buffer(char *, int);
#endif


/*
 * insmod needs to find the variable and make it point to something
 */
#ifdef MODULE
static char *qla1280;

/* insmod qla1280 options=verbose" */
module_param(qla1280, charp, 0);
#else
__setup("qla1280=", qla1280_setup);
#endif


/*
 * We use the scsi_pointer structure that's included with each scsi_command
 * to overlay our struct srb over it. qla1280_init() checks that a srb is not
 * bigger than a scsi_pointer.
 */

#define CMD_SP(Cmnd)        &Cmnd->SCp
#define CMD_CDBLEN(Cmnd)    Cmnd->cmd_len
#define CMD_CDBP(Cmnd)      Cmnd->cmnd
#define CMD_SNSP(Cmnd)      Cmnd->sense_buffer
#define CMD_SNSLEN(Cmnd)    SCSI_SENSE_BUFFERSIZE
#define CMD_RESULT(Cmnd)    Cmnd->result
#define CMD_HANDLE(Cmnd)    Cmnd->host_scribble
#define CMD_REQUEST(Cmnd)   Cmnd->request->cmd

#define CMD_HOST(Cmnd)      Cmnd->device->host
#define SCSI_BUS_32(Cmnd)   Cmnd->device->channel
#define SCSI_TCN_32(Cmnd)   Cmnd->device->id
#define SCSI_LUN_32(Cmnd)   Cmnd->device->lun


/*****************************************/
/*   ISP Boards supported by this driver */
/*****************************************/

struct qla_boards {
    char *name;     /* Board ID String */
    int numPorts;       /* Number of SCSI ports */
    int fw_index;       /* index into qla1280_fw_tbl for firmware */
};

/* NOTE: the last argument in each entry is used to index ql1280_board_tbl */
static struct pci_device_id qla1280_pci_tbl[] = {
    {PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP12160,
        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
    {PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP1020,
        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
    {PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP1080,
        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
    {PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP1240,
        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
    {PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP1280,
        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
    {PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP10160,
        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5},
    {0,}
};
MODULE_DEVICE_TABLE(pci, qla1280_pci_tbl);

DEFINE_MUTEX(qla1280_firmware_mutex);

struct qla_fw {
    char *fwname;
    const struct firmware *fw;
};

#define QL_NUM_FW_IMAGES 3

struct qla_fw qla1280_fw_tbl[QL_NUM_FW_IMAGES] = {
    {"qlogic/1040.bin",  NULL}, /* image 0 */
    {"qlogic/1280.bin",  NULL}, /* image 1 */
    {"qlogic/12160.bin", NULL}, /* image 2 */
};

/* NOTE: Order of boards in this table must match order in qla1280_pci_tbl */
static struct qla_boards ql1280_board_tbl[] = {
    {.name = "QLA12160", .numPorts = 2, .fw_index = 2},
    {.name = "QLA1040" , .numPorts = 1, .fw_index = 0},
    {.name = "QLA1080" , .numPorts = 1, .fw_index = 1},
    {.name = "QLA1240" , .numPorts = 2, .fw_index = 1},
    {.name = "QLA1280" , .numPorts = 2, .fw_index = 1},
    {.name = "QLA10160", .numPorts = 1, .fw_index = 2},
    {.name = "        ", .numPorts = 0, .fw_index = -1},
};

static int qla1280_verbose = 1;

#if DEBUG_QLA1280
static int ql_debug_level = 1;
#define dprintk(level, format, a...)    \
    do { if (ql_debug_level >= level) printk(KERN_ERR format, ##a); } while(0)
#define qla1280_dump_buffer(level, buf, size)   \
    if (ql_debug_level >= level) __qla1280_dump_buffer(buf, size)
#define qla1280_print_scsi_cmd(level, cmd)  \
    if (ql_debug_level >= level) __qla1280_print_scsi_cmd(cmd)
#else
#define ql_debug_level          0
#define dprintk(level, format, a...)    do{}while(0)
#define qla1280_dump_buffer(a, b, c)    do{}while(0)
#define qla1280_print_scsi_cmd(a, b)    do{}while(0)
#endif

#define ENTER(x)        dprintk(3, "qla1280 : Entering %s()\n", x);
#define LEAVE(x)        dprintk(3, "qla1280 : Leaving %s()\n", x);
#define ENTER_INTR(x)       dprintk(4, "qla1280 : Entering %s()\n", x);
#define LEAVE_INTR(x)       dprintk(4, "qla1280 : Leaving %s()\n", x);


static int qla1280_read_nvram(struct scsi_qla_host *ha)
{
    uint16_t *wptr;
    uint8_t chksum;
    int cnt, i;
    struct nvram *nv;

    ENTER("qla1280_read_nvram");

    if (driver_setup.no_nvram)
        return 1;

    printk(KERN_INFO "scsi(%ld): Reading NVRAM\n", ha->host_no);

    wptr = (uint16_t *)&ha->nvram;
    nv = &ha->nvram;
    chksum = 0;
    for (cnt = 0; cnt < 3; cnt++) {
        *wptr = qla1280_get_nvram_word(ha, cnt);
        chksum += *wptr & 0xff;
        chksum += (*wptr >> 8) & 0xff;
        wptr++;
    }

    if (nv->id0 != 'I' || nv->id1 != 'S' ||
        nv->id2 != 'P' || nv->id3 != ' ' || nv->version < 1) {
        dprintk(2, "Invalid nvram ID or version!\n");
        chksum = 1;
    } else {
        for (; cnt < sizeof(struct nvram); cnt++) {
            *wptr = qla1280_get_nvram_word(ha, cnt);
            chksum += *wptr & 0xff;
            chksum += (*wptr >> 8) & 0xff;
            wptr++;
        }
    }

    dprintk(3, "qla1280_read_nvram: NVRAM Magic ID= %c %c %c %02x"
           " version %i\n", nv->id0, nv->id1, nv->id2, nv->id3,
           nv->version);


    if (chksum) {
        if (!driver_setup.no_nvram)
            printk(KERN_WARNING "scsi(%ld): Unable to identify or "
                   "validate NVRAM checksum, using default "
                   "settings\n", ha->host_no);
        ha->nvram_valid = 0;
    } else
        ha->nvram_valid = 1;

    /* The firmware interface is, um, interesting, in that the
     * actual firmware image on the chip is little endian, thus,
     * the process of taking that image to the CPU would end up
     * little endian.  However, the firmware interface requires it
     * to be read a word (two bytes) at a time.
     *
     * The net result of this would be that the word (and
     * doubleword) quantites in the firmware would be correct, but
     * the bytes would be pairwise reversed.  Since most of the
     * firmware quantites are, in fact, bytes, we do an extra
     * le16_to_cpu() in the firmware read routine.
     *
     * The upshot of all this is that the bytes in the firmware
     * are in the correct places, but the 16 and 32 bit quantites
     * are still in little endian format.  We fix that up below by
     * doing extra reverses on them */
    nv->isp_parameter = cpu_to_le16(nv->isp_parameter);
    nv->firmware_feature.w = cpu_to_le16(nv->firmware_feature.w);
    for(i = 0; i < MAX_BUSES; i++) {
        nv->bus[i].selection_timeout = cpu_to_le16(nv->bus[i].selection_timeout);
        nv->bus[i].max_queue_depth = cpu_to_le16(nv->bus[i].max_queue_depth);
    }
    dprintk(1, "qla1280_read_nvram: Completed Reading NVRAM\n");
    LEAVE("qla1280_read_nvram");

    return chksum;
}

/**************************************************************************
 *   qla1280_info
 *     Return a string describing the driver.
 **************************************************************************/
static const char *
qla1280_info(struct Scsi_Host *host)
{
    static char qla1280_scsi_name_buffer[125];
    char *bp;
    struct scsi_qla_host *ha;
    struct qla_boards *bdp;

    bp = &qla1280_scsi_name_buffer[0];
    ha = (struct scsi_qla_host *)host->hostdata;
    bdp = &ql1280_board_tbl[ha->devnum];
    memset(bp, 0, sizeof(qla1280_scsi_name_buffer));

    sprintf (bp,
         "QLogic %s PCI to SCSI Host Adapter\n"
         "       Firmware version: %2d.%02d.%02d, Driver version %s",
         &bdp->name[0], ha->fwver1, ha->fwver2, ha->fwver3,
         QLA1280_VERSION);
    return bp;
}

/**************************************************************************
 *   qla1280_queuecommand
 *     Queue a command to the controller.
 *
 * Note:
 * The mid-level driver tries to ensures that queuecommand never gets invoked
 * concurrently with itself or the interrupt handler (although the
 * interrupt handler may call this routine as part of request-completion
 * handling).   Unfortunely, it sometimes calls the scheduler in interrupt
 * context which is a big NO! NO!.
 **************************************************************************/
static int
qla1280_queuecommand_lck(struct scsi_cmnd *cmd, void (*fn)(struct scsi_cmnd *))
{
    struct Scsi_Host *host = cmd->device->host;
    struct scsi_qla_host *ha = (struct scsi_qla_host *)host->hostdata;
    struct srb *sp = (struct srb *)CMD_SP(cmd);
    int status;

    cmd->scsi_done = fn;
    sp->cmd = cmd;
    sp->flags = 0;
    sp->wait = NULL;
    CMD_HANDLE(cmd) = (unsigned char *)NULL;

    qla1280_print_scsi_cmd(5, cmd);

#ifdef QLA_64BIT_PTR
    /*
     * Using 64 bit commands if the PCI bridge doesn't support it is a
     * bit wasteful, however this should really only happen if one's
     * PCI controller is completely broken, like the BCM1250. For
     * sane hardware this is not an issue.
     */
    status = qla1280_64bit_start_scsi(ha, sp);
#else
    status = qla1280_32bit_start_scsi(ha, sp);
#endif
    return status;
}

static DEF_SCSI_QCMD(qla1280_queuecommand)

enum action {
    ABORT_COMMAND,
    DEVICE_RESET,
    BUS_RESET,
    ADAPTER_RESET,
};


static void qla1280_mailbox_timeout(unsigned long __data)
{
    struct scsi_qla_host *ha = (struct scsi_qla_host *)__data;
    struct device_reg __iomem *reg;
    reg = ha->iobase;

    ha->mailbox_out[0] = RD_REG_WORD(&reg->mailbox0);
    printk(KERN_ERR "scsi(%ld): mailbox timed out, mailbox0 %04x, "
           "ictrl %04x, istatus %04x\n", ha->host_no, ha->mailbox_out[0],
           RD_REG_WORD(&reg->ictrl), RD_REG_WORD(&reg->istatus));
    complete(ha->mailbox_wait);
}

static int
_qla1280_wait_for_single_command(struct scsi_qla_host *ha, struct srb *sp,
                 struct completion *wait)
{
    int status = FAILED;
    struct scsi_cmnd *cmd = sp->cmd;

    spin_unlock_irq(ha->host->host_lock);
    wait_for_completion_timeout(wait, 4*HZ);
    spin_lock_irq(ha->host->host_lock);
    sp->wait = NULL;
    if(CMD_HANDLE(cmd) == COMPLETED_HANDLE) {
        status = SUCCESS;
        (*cmd->scsi_done)(cmd);
    }
    return status;
}

static int
qla1280_wait_for_single_command(struct scsi_qla_host *ha, struct srb *sp)
{
    DECLARE_COMPLETION_ONSTACK(wait);

    sp->wait = &wait;
    return _qla1280_wait_for_single_command(ha, sp, &wait);
}

static int
qla1280_wait_for_pending_commands(struct scsi_qla_host *ha, int bus, int target)
{
    int     cnt;
    int     status;
    struct srb  *sp;
    struct scsi_cmnd *cmd;

    status = SUCCESS;

    /*
     * Wait for all commands with the designated bus/target
     * to be completed by the firmware
     */
    for (cnt = 0; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
        sp = ha->outstanding_cmds[cnt];
        if (sp) {
            cmd = sp->cmd;

            if (bus >= 0 && SCSI_BUS_32(cmd) != bus)
                continue;
            if (target >= 0 && SCSI_TCN_32(cmd) != target)
                continue;

            status = qla1280_wait_for_single_command(ha, sp);
            if (status == FAILED)
                break;
        }
    }
    return status;
}

/**************************************************************************
 * qla1280_error_action
 *    The function will attempt to perform a specified error action and
 *    wait for the results (or time out).
 *
 * Input:
 *      cmd = Linux SCSI command packet of the command that cause the
 *            bus reset.
 *      action = error action to take (see action_t)
 *
 * Returns:
 *      SUCCESS or FAILED
 *
 **************************************************************************/
static int
qla1280_error_action(struct scsi_cmnd *cmd, enum action action)
{
    struct scsi_qla_host *ha;
    int bus, target, lun;
    struct srb *sp;
    int i, found;
    int result=FAILED;
    int wait_for_bus=-1;
    int wait_for_target = -1;
    DECLARE_COMPLETION_ONSTACK(wait);

    ENTER("qla1280_error_action");

    ha = (struct scsi_qla_host *)(CMD_HOST(cmd)->hostdata);
    sp = (struct srb *)CMD_SP(cmd);
    bus = SCSI_BUS_32(cmd);
    target = SCSI_TCN_32(cmd);
    lun = SCSI_LUN_32(cmd);

    dprintk(4, "error_action %i, istatus 0x%04x\n", action,
        RD_REG_WORD(&ha->iobase->istatus));

    dprintk(4, "host_cmd 0x%04x, ictrl 0x%04x, jiffies %li\n",
        RD_REG_WORD(&ha->iobase->host_cmd),
        RD_REG_WORD(&ha->iobase->ictrl), jiffies);

    if (qla1280_verbose)
        printk(KERN_INFO "scsi(%li): Resetting Cmnd=0x%p, "
               "Handle=0x%p, action=0x%x\n",
               ha->host_no, cmd, CMD_HANDLE(cmd), action);

    /*
     * Check to see if we have the command in the outstanding_cmds[]
     * array.  If not then it must have completed before this error
     * action was initiated.  If the error_action isn't ABORT_COMMAND
     * then the driver must proceed with the requested action.
     */
    found = -1;
    for (i = 0; i < MAX_OUTSTANDING_COMMANDS; i++) {
        if (sp == ha->outstanding_cmds[i]) {
            found = i;
            sp->wait = &wait; /* we'll wait for it to complete */
            break;
        }
    }

    if (found < 0) {    /* driver doesn't have command */
        result = SUCCESS;
        if (qla1280_verbose) {
            printk(KERN_INFO
                   "scsi(%ld:%d:%d:%d): specified command has "
                   "already completed.\n", ha->host_no, bus,
                target, lun);
        }
    }

    switch (action) {

    case ABORT_COMMAND:
        dprintk(1, "qla1280: RISC aborting command\n");
        /*
         * The abort might fail due to race when the host_lock
         * is released to issue the abort.  As such, we
         * don't bother to check the return status.
         */
        if (found >= 0)
            qla1280_abort_command(ha, sp, found);
        break;

    case DEVICE_RESET:
        if (qla1280_verbose)
            printk(KERN_INFO
                   "scsi(%ld:%d:%d:%d): Queueing device reset "
                   "command.\n", ha->host_no, bus, target, lun);
        if (qla1280_device_reset(ha, bus, target) == 0) {
            /* issued device reset, set wait conditions */
            wait_for_bus = bus;
            wait_for_target = target;
        }
        break;

    case BUS_RESET:
        if (qla1280_verbose)
            printk(KERN_INFO "qla1280(%ld:%d): Issued bus "
                   "reset.\n", ha->host_no, bus);
        if (qla1280_bus_reset(ha, bus) == 0) {
            /* issued bus reset, set wait conditions */
            wait_for_bus = bus;
        }
        break;

    case ADAPTER_RESET:
    default:
        if (qla1280_verbose) {
            printk(KERN_INFO
                   "scsi(%ld): Issued ADAPTER RESET\n",
                   ha->host_no);
            printk(KERN_INFO "scsi(%ld): I/O processing will "
                   "continue automatically\n", ha->host_no);
        }
        ha->flags.reset_active = 1;

        if (qla1280_abort_isp(ha) != 0) {   /* it's dead */
            result = FAILED;
        }

        ha->flags.reset_active = 0;
    }

    /*
     * At this point, the host_lock has been released and retaken
     * by the issuance of the mailbox command.
     * Wait for the command passed in by the mid-layer if it
     * was found by the driver.  It might have been returned
     * between eh recovery steps, hence the check of the "found"
     * variable.
     */

    if (found >= 0)
        result = _qla1280_wait_for_single_command(ha, sp, &wait);

    if (action == ABORT_COMMAND && result != SUCCESS) {
        printk(KERN_WARNING
               "scsi(%li:%i:%i:%i): "
               "Unable to abort command!\n",
               ha->host_no, bus, target, lun);
    }

    /*
     * If the command passed in by the mid-layer has been
     * returned by the board, then wait for any additional
     * commands which are supposed to complete based upon
     * the error action.
     *
     * All commands are unconditionally returned during a
     * call to qla1280_abort_isp(), ADAPTER_RESET.  No need
     * to wait for them.
     */
    if (result == SUCCESS && wait_for_bus >= 0) {
        result = qla1280_wait_for_pending_commands(ha,
                    wait_for_bus, wait_for_target);
    }

    dprintk(1, "RESET returning %d\n", result);

    LEAVE("qla1280_error_action");
    return result;
}

/**************************************************************************
 *   qla1280_abort
 *     Abort the specified SCSI command(s).
 **************************************************************************/
static int
qla1280_eh_abort(struct scsi_cmnd * cmd)
{
    int rc;

    spin_lock_irq(cmd->device->host->host_lock);
    rc = qla1280_error_action(cmd, ABORT_COMMAND);
    spin_unlock_irq(cmd->device->host->host_lock);

    return rc;
}

/**************************************************************************
 *   qla1280_device_reset
 *     Reset the specified SCSI device
 **************************************************************************/
static int
qla1280_eh_device_reset(struct scsi_cmnd *cmd)
{
    int rc;

    spin_lock_irq(cmd->device->host->host_lock);
    rc = qla1280_error_action(cmd, DEVICE_RESET);
    spin_unlock_irq(cmd->device->host->host_lock);

    return rc;
}

/**************************************************************************
 *   qla1280_bus_reset
 *     Reset the specified bus.
 **************************************************************************/
static int
qla1280_eh_bus_reset(struct scsi_cmnd *cmd)
{
    int rc;

    spin_lock_irq(cmd->device->host->host_lock);
    rc = qla1280_error_action(cmd, BUS_RESET);
    spin_unlock_irq(cmd->device->host->host_lock);

    return rc;
}

/**************************************************************************
 *   qla1280_adapter_reset
 *     Reset the specified adapter (both channels)
 **************************************************************************/
static int
qla1280_eh_adapter_reset(struct scsi_cmnd *cmd)
{
    int rc;

    spin_lock_irq(cmd->device->host->host_lock);
    rc = qla1280_error_action(cmd, ADAPTER_RESET);
    spin_unlock_irq(cmd->device->host->host_lock);

    return rc;
}

static int
qla1280_biosparam(struct scsi_device *sdev, struct block_device *bdev,
          sector_t capacity, int geom[])
{
    int heads, sectors, cylinders;

    heads = 64;
    sectors = 32;
    cylinders = (unsigned long)capacity / (heads * sectors);
    if (cylinders > 1024) {
        heads = 255;
        sectors = 63;
        cylinders = (unsigned long)capacity / (heads * sectors);
        /* if (cylinders > 1023)
           cylinders = 1023; */
    }

    geom[0] = heads;
    geom[1] = sectors;
    geom[2] = cylinders;

    return 0;
}

 
/* disable risc and host interrupts */
static inline void
qla1280_disable_intrs(struct scsi_qla_host *ha)
{
    WRT_REG_WORD(&ha->iobase->ictrl, 0);
    RD_REG_WORD(&ha->iobase->ictrl);    /* PCI Posted Write flush */
}

/* enable risc and host interrupts */
static inline void
qla1280_enable_intrs(struct scsi_qla_host *ha)
{
    WRT_REG_WORD(&ha->iobase->ictrl, (ISP_EN_INT | ISP_EN_RISC));
    RD_REG_WORD(&ha->iobase->ictrl);    /* PCI Posted Write flush */
}

/**************************************************************************
 * qla1280_intr_handler
 *   Handles the H/W interrupt
 **************************************************************************/
static irqreturn_t
qla1280_intr_handler(int irq, void *dev_id)
{
    struct scsi_qla_host *ha;
    struct device_reg __iomem *reg;
    u16 data;
    int handled = 0;

    ENTER_INTR ("qla1280_intr_handler");
    ha = (struct scsi_qla_host *)dev_id;

    spin_lock(ha->host->host_lock);

    ha->isr_count++;
    reg = ha->iobase;

    qla1280_disable_intrs(ha);

    data = qla1280_debounce_register(&reg->istatus);
    /* Check for pending interrupts. */
    if (data & RISC_INT) {  
        qla1280_isr(ha, &ha->done_q);
        handled = 1;
    }
    if (!list_empty(&ha->done_q))
        qla1280_done(ha);

    spin_unlock(ha->host->host_lock);

    qla1280_enable_intrs(ha);

    LEAVE_INTR("qla1280_intr_handler");
    return IRQ_RETVAL(handled);
}


static int
qla1280_set_target_parameters(struct scsi_qla_host *ha, int bus, int target)
{
    uint8_t mr;
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    struct nvram *nv;
    int status, lun;

    nv = &ha->nvram;

    mr = BIT_3 | BIT_2 | BIT_1 | BIT_0;

    /* Set Target Parameters. */
    mb[0] = MBC_SET_TARGET_PARAMETERS;
    mb[1] = (uint16_t)((bus ? target | BIT_7 : target) << 8);
    mb[2] = nv->bus[bus].target[target].parameter.renegotiate_on_error << 8;
    mb[2] |= nv->bus[bus].target[target].parameter.stop_queue_on_check << 9;
    mb[2] |= nv->bus[bus].target[target].parameter.auto_request_sense << 10;
    mb[2] |= nv->bus[bus].target[target].parameter.tag_queuing << 11;
    mb[2] |= nv->bus[bus].target[target].parameter.enable_sync << 12;
    mb[2] |= nv->bus[bus].target[target].parameter.enable_wide << 13;
    mb[2] |= nv->bus[bus].target[target].parameter.parity_checking << 14;
    mb[2] |= nv->bus[bus].target[target].parameter.disconnect_allowed << 15;

    if (IS_ISP1x160(ha)) {
        mb[2] |= nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr << 5;
        mb[3] = (nv->bus[bus].target[target].flags.flags1x160.sync_offset << 8);
        mb[6] = (nv->bus[bus].target[target].ppr_1x160.flags.ppr_options << 8) |
             nv->bus[bus].target[target].ppr_1x160.flags.ppr_bus_width;
        mr |= BIT_6;
    } else {
        mb[3] = (nv->bus[bus].target[target].flags.flags1x80.sync_offset << 8);
    }
    mb[3] |= nv->bus[bus].target[target].sync_period;

    status = qla1280_mailbox_command(ha, mr, mb);

    /* Set Device Queue Parameters. */
    for (lun = 0; lun < MAX_LUNS; lun++) {
        mb[0] = MBC_SET_DEVICE_QUEUE;
        mb[1] = (uint16_t)((bus ? target | BIT_7 : target) << 8);
        mb[1] |= lun;
        mb[2] = nv->bus[bus].max_queue_depth;
        mb[3] = nv->bus[bus].target[target].execution_throttle;
        status |= qla1280_mailbox_command(ha, 0x0f, mb);
    }

    if (status)
        printk(KERN_WARNING "scsi(%ld:%i:%i): "
               "qla1280_set_target_parameters() failed\n",
               ha->host_no, bus, target);
    return status;
}


/**************************************************************************
 *   qla1280_slave_configure
 *
 * Description:
 *   Determines the queue depth for a given device.  There are two ways
 *   a queue depth can be obtained for a tagged queueing device.  One
 *   way is the default queue depth which is determined by whether
 *   If it is defined, then it is used
 *   as the default queue depth.  Otherwise, we use either 4 or 8 as the
 *   default queue depth (dependent on the number of hardware SCBs).
 **************************************************************************/
static int
qla1280_slave_configure(struct scsi_device *device)
{
    struct scsi_qla_host *ha;
    int default_depth = 3;
    int bus = device->channel;
    int target = device->id;
    int status = 0;
    struct nvram *nv;
    unsigned long flags;

    ha = (struct scsi_qla_host *)device->host->hostdata;
    nv = &ha->nvram;

    if (qla1280_check_for_dead_scsi_bus(ha, bus))
        return 1;

    if (device->tagged_supported &&
        (ha->bus_settings[bus].qtag_enables & (BIT_0 << target))) {
        scsi_adjust_queue_depth(device, MSG_ORDERED_TAG,
                    ha->bus_settings[bus].hiwat);
    } else {
        scsi_adjust_queue_depth(device, 0, default_depth);
    }

    nv->bus[bus].target[target].parameter.enable_sync = device->sdtr;
    nv->bus[bus].target[target].parameter.enable_wide = device->wdtr;
    nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr = device->ppr;

    if (driver_setup.no_sync ||
        (driver_setup.sync_mask &&
         (~driver_setup.sync_mask & (1 << target))))
        nv->bus[bus].target[target].parameter.enable_sync = 0;
    if (driver_setup.no_wide ||
        (driver_setup.wide_mask &&
         (~driver_setup.wide_mask & (1 << target))))
        nv->bus[bus].target[target].parameter.enable_wide = 0;
    if (IS_ISP1x160(ha)) {
        if (driver_setup.no_ppr ||
            (driver_setup.ppr_mask &&
             (~driver_setup.ppr_mask & (1 << target))))
            nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr = 0;
    }

    spin_lock_irqsave(ha->host->host_lock, flags);
    if (nv->bus[bus].target[target].parameter.enable_sync)
        status = qla1280_set_target_parameters(ha, bus, target);
    qla1280_get_target_parameters(ha, device);
    spin_unlock_irqrestore(ha->host->host_lock, flags);
    return status;
}


/*
 * qla1280_done
 *      Process completed commands.
 *
 * Input:
 *      ha           = adapter block pointer.
 */
static void
qla1280_done(struct scsi_qla_host *ha)
{
    struct srb *sp;
    struct list_head *done_q;
    int bus, target, lun;
    struct scsi_cmnd *cmd;

    ENTER("qla1280_done");

    done_q = &ha->done_q;

    while (!list_empty(done_q)) {
        sp = list_entry(done_q->next, struct srb, list);

        list_del(&sp->list);
    
        cmd = sp->cmd;
        bus = SCSI_BUS_32(cmd);
        target = SCSI_TCN_32(cmd);
        lun = SCSI_LUN_32(cmd);

        switch ((CMD_RESULT(cmd) >> 16)) {
        case DID_RESET:
            /* Issue marker command. */
            if (!ha->flags.abort_isp_active)
                qla1280_marker(ha, bus, target, 0, MK_SYNC_ID);
            break;
        case DID_ABORT:
            sp->flags &= ~SRB_ABORT_PENDING;
            sp->flags |= SRB_ABORTED;
            break;
        default:
            break;
        }

        /* Release memory used for this I/O */
        scsi_dma_unmap(cmd);

        /* Call the mid-level driver interrupt handler */
        ha->actthreads--;

        if (sp->wait == NULL)
            (*(cmd)->scsi_done)(cmd);
        else
            complete(sp->wait);
    }
    LEAVE("qla1280_done");
}

/*
 * Translates a ISP error to a Linux SCSI error
 */
static int
qla1280_return_status(struct response * sts, struct scsi_cmnd *cp)
{
    int host_status = DID_ERROR;
    uint16_t comp_status = le16_to_cpu(sts->comp_status);
    uint16_t state_flags = le16_to_cpu(sts->state_flags);
    uint32_t residual_length = le32_to_cpu(sts->residual_length);
    uint16_t scsi_status = le16_to_cpu(sts->scsi_status);
#if DEBUG_QLA1280_INTR
    static char *reason[] = {
        "DID_OK",
        "DID_NO_CONNECT",
        "DID_BUS_BUSY",
        "DID_TIME_OUT",
        "DID_BAD_TARGET",
        "DID_ABORT",
        "DID_PARITY",
        "DID_ERROR",
        "DID_RESET",
        "DID_BAD_INTR"
    };
#endif              /* DEBUG_QLA1280_INTR */

    ENTER("qla1280_return_status");

#if DEBUG_QLA1280_INTR
    /*
      dprintk(1, "qla1280_return_status: compl status = 0x%04x\n",
      comp_status);
    */
#endif

    switch (comp_status) {
    case CS_COMPLETE:
        host_status = DID_OK;
        break;

    case CS_INCOMPLETE:
        if (!(state_flags & SF_GOT_BUS))
            host_status = DID_NO_CONNECT;
        else if (!(state_flags & SF_GOT_TARGET))
            host_status = DID_BAD_TARGET;
        else if (!(state_flags & SF_SENT_CDB))
            host_status = DID_ERROR;
        else if (!(state_flags & SF_TRANSFERRED_DATA))
            host_status = DID_ERROR;
        else if (!(state_flags & SF_GOT_STATUS))
            host_status = DID_ERROR;
        else if (!(state_flags & SF_GOT_SENSE))
            host_status = DID_ERROR;
        break;

    case CS_RESET:
        host_status = DID_RESET;
        break;

    case CS_ABORTED:
        host_status = DID_ABORT;
        break;

    case CS_TIMEOUT:
        host_status = DID_TIME_OUT;
        break;

    case CS_DATA_OVERRUN:
        dprintk(2, "Data overrun 0x%x\n", residual_length);
        dprintk(2, "qla1280_return_status: response packet data\n");
        qla1280_dump_buffer(2, (char *)sts, RESPONSE_ENTRY_SIZE);
        host_status = DID_ERROR;
        break;

    case CS_DATA_UNDERRUN:
        if ((scsi_bufflen(cp) - residual_length) <
            cp->underflow) {
            printk(KERN_WARNING
                   "scsi: Underflow detected - retrying "
                   "command.\n");
            host_status = DID_ERROR;
        } else {
            scsi_set_resid(cp, residual_length);
            host_status = DID_OK;
        }
        break;

    default:
        host_status = DID_ERROR;
        break;
    }

#if DEBUG_QLA1280_INTR
    dprintk(1, "qla1280 ISP status: host status (%s) scsi status %x\n",
        reason[host_status], scsi_status);
#endif

    LEAVE("qla1280_return_status");

    return (scsi_status & 0xff) | (host_status << 16);
}

/****************************************************************************/
/*                QLogic ISP1280 Hardware Support Functions.                */
/****************************************************************************/

/*
 * qla1280_initialize_adapter
 *      Initialize board.
 *
 * Input:
 *      ha = adapter block pointer.
 *
 * Returns:
 *      0 = success
 */
static int __devinit
qla1280_initialize_adapter(struct scsi_qla_host *ha)
{
    struct device_reg __iomem *reg;
    int status;
    int bus;
    unsigned long flags;

    ENTER("qla1280_initialize_adapter");

    /* Clear adapter flags. */
    ha->flags.online = 0;
    ha->flags.disable_host_adapter = 0;
    ha->flags.reset_active = 0;
    ha->flags.abort_isp_active = 0;

#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
    if (ia64_platform_is("sn2")) {
        printk(KERN_INFO "scsi(%li): Enabling SN2 PCI DMA "
               "dual channel lockup workaround\n", ha->host_no);
        ha->flags.use_pci_vchannel = 1;
        driver_setup.no_nvram = 1;
    }
#endif

    /* TODO: implement support for the 1040 nvram format */
    if (IS_ISP1040(ha))
        driver_setup.no_nvram = 1;

    dprintk(1, "Configure PCI space for adapter...\n");

    reg = ha->iobase;

    /* Insure mailbox registers are free. */
    WRT_REG_WORD(&reg->semaphore, 0);
    WRT_REG_WORD(&reg->host_cmd, HC_CLR_RISC_INT);
    WRT_REG_WORD(&reg->host_cmd, HC_CLR_HOST_INT);
    RD_REG_WORD(&reg->host_cmd);

    if (qla1280_read_nvram(ha)) {
        dprintk(2, "qla1280_initialize_adapter: failed to read "
            "NVRAM\n");
    }

    /*
     * It's necessary to grab the spin here as qla1280_mailbox_command
     * needs to be able to drop the lock unconditionally to wait
     * for completion.
     */
    spin_lock_irqsave(ha->host->host_lock, flags);

    status = qla1280_load_firmware(ha);
    if (status) {
        printk(KERN_ERR "scsi(%li): initialize: pci probe failed!\n",
               ha->host_no);
        goto out;
    }

    /* Setup adapter based on NVRAM parameters. */
    dprintk(1, "scsi(%ld): Configure NVRAM parameters\n", ha->host_no);
    qla1280_nvram_config(ha);

    if (ha->flags.disable_host_adapter) {
        status = 1;
        goto out;
    }

    status = qla1280_init_rings(ha);
    if (status)
        goto out;

    /* Issue SCSI reset, if we can't reset twice then bus is dead */
    for (bus = 0; bus < ha->ports; bus++) {
        if (!ha->bus_settings[bus].disable_scsi_reset &&
            qla1280_bus_reset(ha, bus) &&
            qla1280_bus_reset(ha, bus))
            ha->bus_settings[bus].scsi_bus_dead = 1;
    }

    ha->flags.online = 1;
 out:
    spin_unlock_irqrestore(ha->host->host_lock, flags);

    if (status)
        dprintk(2, "qla1280_initialize_adapter: **** FAILED ****\n");

    LEAVE("qla1280_initialize_adapter");
    return status;
}

/*
 * qla1280_request_firmware
 *      Acquire firmware for chip.  Retain in memory
 *      for error recovery.
 *
 * Input:
 *      ha = adapter block pointer.
 *
 * Returns:
 *      Pointer to firmware image or an error code
 *      cast to pointer via ERR_PTR().
 */
static const struct firmware *
qla1280_request_firmware(struct scsi_qla_host *ha)
{
    const struct firmware *fw;
    int err;
    int index;
    char *fwname;

    spin_unlock_irq(ha->host->host_lock);
    mutex_lock(&qla1280_firmware_mutex);

    index = ql1280_board_tbl[ha->devnum].fw_index;
    fw = qla1280_fw_tbl[index].fw;
    if (fw)
        goto out;

    fwname = qla1280_fw_tbl[index].fwname;
    err = request_firmware(&fw, fwname, &ha->pdev->dev);

    if (err) {
        printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
               fwname, err);
        fw = ERR_PTR(err);
        goto unlock;
    }
    if ((fw->size % 2) || (fw->size < 6)) {
        printk(KERN_ERR "Invalid firmware length %zu in image \"%s\"\n",
               fw->size, fwname);
        release_firmware(fw);
        fw = ERR_PTR(-EINVAL);
        goto unlock;
    }

    qla1280_fw_tbl[index].fw = fw;

 out:
    ha->fwver1 = fw->data[0];
    ha->fwver2 = fw->data[1];
    ha->fwver3 = fw->data[2];
 unlock:
    mutex_unlock(&qla1280_firmware_mutex);
    spin_lock_irq(ha->host->host_lock);
    return fw;
}

/*
 * Chip diagnostics
 *      Test chip for proper operation.
 *
 * Input:
 *      ha = adapter block pointer.
 *
 * Returns:
 *      0 = success.
 */
static int
qla1280_chip_diag(struct scsi_qla_host *ha)
{
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    struct device_reg __iomem *reg = ha->iobase;
    int status = 0;
    int cnt;
    uint16_t data;
    dprintk(3, "qla1280_chip_diag: testing device at 0x%p \n", &reg->id_l);

    dprintk(1, "scsi(%ld): Verifying chip\n", ha->host_no);

    /* Soft reset chip and wait for it to finish. */
    WRT_REG_WORD(&reg->ictrl, ISP_RESET);

    /*
     * We can't do a traditional PCI write flush here by reading
     * back the register. The card will not respond once the reset
     * is in action and we end up with a machine check exception
     * instead. Nothing to do but wait and hope for the best.
     * A portable pci_write_flush(pdev) call would be very useful here.
     */
    udelay(20);
    data = qla1280_debounce_register(&reg->ictrl);
    /*
     * Yet another QLogic gem ;-(
     */
    for (cnt = 1000000; cnt && data & ISP_RESET; cnt--) {
        udelay(5);
        data = RD_REG_WORD(&reg->ictrl);
    }

    if (!cnt)
        goto fail;

    /* Reset register cleared by chip reset. */
    dprintk(3, "qla1280_chip_diag: reset register cleared by chip reset\n");

    WRT_REG_WORD(&reg->cfg_1, 0);

    /* Reset RISC and disable BIOS which
       allows RISC to execute out of RAM. */
    WRT_REG_WORD(&reg->host_cmd, HC_RESET_RISC |
             HC_RELEASE_RISC | HC_DISABLE_BIOS);

    RD_REG_WORD(&reg->id_l);    /* Flush PCI write */
    data = qla1280_debounce_register(&reg->mailbox0);

    /*
     * I *LOVE* this code!
     */
    for (cnt = 1000000; cnt && data == MBS_BUSY; cnt--) {
        udelay(5);
        data = RD_REG_WORD(&reg->mailbox0);
    }

    if (!cnt)
        goto fail;

    /* Check product ID of chip */
    dprintk(3, "qla1280_chip_diag: Checking product ID of chip\n");

    if (RD_REG_WORD(&reg->mailbox1) != PROD_ID_1 ||
        (RD_REG_WORD(&reg->mailbox2) != PROD_ID_2 &&
         RD_REG_WORD(&reg->mailbox2) != PROD_ID_2a) ||
        RD_REG_WORD(&reg->mailbox3) != PROD_ID_3 ||
        RD_REG_WORD(&reg->mailbox4) != PROD_ID_4) {
        printk(KERN_INFO "qla1280: Wrong product ID = "
               "0x%x,0x%x,0x%x,0x%x\n",
               RD_REG_WORD(&reg->mailbox1),
               RD_REG_WORD(&reg->mailbox2),
               RD_REG_WORD(&reg->mailbox3),
               RD_REG_WORD(&reg->mailbox4));
        goto fail;
    }

    /*
     * Enable ints early!!!
     */
    qla1280_enable_intrs(ha);

    dprintk(1, "qla1280_chip_diag: Checking mailboxes of chip\n");
    /* Wrap Incoming Mailboxes Test. */
    mb[0] = MBC_MAILBOX_REGISTER_TEST;
    mb[1] = 0xAAAA;
    mb[2] = 0x5555;
    mb[3] = 0xAA55;
    mb[4] = 0x55AA;
    mb[5] = 0xA5A5;
    mb[6] = 0x5A5A;
    mb[7] = 0x2525;

    status = qla1280_mailbox_command(ha, 0xff, mb);
    if (status)
        goto fail;

    if (mb[1] != 0xAAAA || mb[2] != 0x5555 || mb[3] != 0xAA55 ||
        mb[4] != 0x55AA || mb[5] != 0xA5A5 || mb[6] != 0x5A5A ||
        mb[7] != 0x2525) {
        printk(KERN_INFO "qla1280: Failed mbox check\n");
        goto fail;
    }

    dprintk(3, "qla1280_chip_diag: exiting normally\n");
    return 0;
 fail:
    dprintk(2, "qla1280_chip_diag: **** FAILED ****\n");
    return status;
}

static int
qla1280_load_firmware_pio(struct scsi_qla_host *ha)
{
    /* enter with host_lock acquired */

    const struct firmware *fw;
    const __le16 *fw_data;
    uint16_t risc_address, risc_code_size;
    uint16_t mb[MAILBOX_REGISTER_COUNT], i;
    int err = 0;

    fw = qla1280_request_firmware(ha);
    if (IS_ERR(fw))
        return PTR_ERR(fw);

    fw_data = (const __le16 *)&fw->data[0];
    ha->fwstart = __le16_to_cpu(fw_data[2]);

    /* Load RISC code. */
    risc_address = ha->fwstart;
    fw_data = (const __le16 *)&fw->data[6];
    risc_code_size = (fw->size - 6) / 2;

    for (i = 0; i < risc_code_size; i++) {
        mb[0] = MBC_WRITE_RAM_WORD;
        mb[1] = risc_address + i;
        mb[2] = __le16_to_cpu(fw_data[i]);

        err = qla1280_mailbox_command(ha, BIT_0 | BIT_1 | BIT_2, mb);
        if (err) {
            printk(KERN_ERR "scsi(%li): Failed to load firmware\n",
                    ha->host_no);
            break;
        }
    }

    return err;
}

#define DUMP_IT_BACK 0      /* for debug of RISC loading */
static int
qla1280_load_firmware_dma(struct scsi_qla_host *ha)
{
    /* enter with host_lock acquired */
    const struct firmware *fw;
    const __le16 *fw_data;
    uint16_t risc_address, risc_code_size;
    uint16_t mb[MAILBOX_REGISTER_COUNT], cnt;
    int err = 0, num, i;
#if DUMP_IT_BACK
    uint8_t *sp, *tbuf;
    dma_addr_t p_tbuf;

    tbuf = pci_alloc_consistent(ha->pdev, 8000, &p_tbuf);
    if (!tbuf)
        return -ENOMEM;
#endif

    fw = qla1280_request_firmware(ha);
    if (IS_ERR(fw))
        return PTR_ERR(fw);

    fw_data = (const __le16 *)&fw->data[0];
    ha->fwstart = __le16_to_cpu(fw_data[2]);

    /* Load RISC code. */
    risc_address = ha->fwstart;
    fw_data = (const __le16 *)&fw->data[6];
    risc_code_size = (fw->size - 6) / 2;

    dprintk(1, "%s: DMA RISC code (%i) words\n",
            __func__, risc_code_size);

    num = 0;
    while (risc_code_size > 0) {
        int warn __attribute__((unused)) = 0;

        cnt = 2000 >> 1;

        if (cnt > risc_code_size)
            cnt = risc_code_size;

        dprintk(2, "qla1280_setup_chip:  loading risc @ =(0x%p),"
            "%d,%d(0x%x)\n",
            fw_data, cnt, num, risc_address);
        for(i = 0; i < cnt; i++)
            ((__le16 *)ha->request_ring)[i] = fw_data[i];

        mb[0] = MBC_LOAD_RAM;
        mb[1] = risc_address;
        mb[4] = cnt;
        mb[3] = ha->request_dma & 0xffff;
        mb[2] = (ha->request_dma >> 16) & 0xffff;
        mb[7] = pci_dma_hi32(ha->request_dma) & 0xffff;
        mb[6] = pci_dma_hi32(ha->request_dma) >> 16;
        dprintk(2, "%s: op=%d  0x%p = 0x%4x,0x%4x,0x%4x,0x%4x\n",
                __func__, mb[0],
                (void *)(long)ha->request_dma,
                mb[6], mb[7], mb[2], mb[3]);
        err = qla1280_mailbox_command(ha, BIT_4 | BIT_3 | BIT_2 |
                BIT_1 | BIT_0, mb);
        if (err) {
            printk(KERN_ERR "scsi(%li): Failed to load partial "
                   "segment of f\n", ha->host_no);
            goto out;
        }

#if DUMP_IT_BACK
        mb[0] = MBC_DUMP_RAM;
        mb[1] = risc_address;
        mb[4] = cnt;
        mb[3] = p_tbuf & 0xffff;
        mb[2] = (p_tbuf >> 16) & 0xffff;
        mb[7] = pci_dma_hi32(p_tbuf) & 0xffff;
        mb[6] = pci_dma_hi32(p_tbuf) >> 16;

        err = qla1280_mailbox_command(ha, BIT_4 | BIT_3 | BIT_2 |
                BIT_1 | BIT_0, mb);
        if (err) {
            printk(KERN_ERR
                   "Failed to dump partial segment of f/w\n");
            goto out;
        }
        sp = (uint8_t *)ha->request_ring;
        for (i = 0; i < (cnt << 1); i++) {
            if (tbuf[i] != sp[i] && warn++ < 10) {
                printk(KERN_ERR "%s: FW compare error @ "
                        "byte(0x%x) loop#=%x\n",
                        __func__, i, num);
                printk(KERN_ERR "%s: FWbyte=%x  "
                        "FWfromChip=%x\n",
                        __func__, sp[i], tbuf[i]);
                /*break; */
            }
        }
#endif
        risc_address += cnt;
        risc_code_size = risc_code_size - cnt;
        fw_data = fw_data + cnt;
        num++;
    }

 out:
#if DUMP_IT_BACK
    pci_free_consistent(ha->pdev, 8000, tbuf, p_tbuf);
#endif
    return err;
}

static int
qla1280_start_firmware(struct scsi_qla_host *ha)
{
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    int err;

    dprintk(1, "%s: Verifying checksum of loaded RISC code.\n",
            __func__);

    /* Verify checksum of loaded RISC code. */
    mb[0] = MBC_VERIFY_CHECKSUM;
    /* mb[1] = ql12_risc_code_addr01; */
    mb[1] = ha->fwstart;
    err = qla1280_mailbox_command(ha, BIT_1 | BIT_0, mb);
    if (err) {
        printk(KERN_ERR "scsi(%li): RISC checksum failed.\n", ha->host_no);
        return err;
    }

    /* Start firmware execution. */
    dprintk(1, "%s: start firmware running.\n", __func__);
    mb[0] = MBC_EXECUTE_FIRMWARE;
    mb[1] = ha->fwstart;
    err = qla1280_mailbox_command(ha, BIT_1 | BIT_0, &mb[0]);
    if (err) {
        printk(KERN_ERR "scsi(%li): Failed to start firmware\n",
                ha->host_no);
    }

    return err;
}

static int
qla1280_load_firmware(struct scsi_qla_host *ha)
{
    /* enter with host_lock taken */
    int err;

    err = qla1280_chip_diag(ha);
    if (err)
        goto out;
    if (IS_ISP1040(ha))
        err = qla1280_load_firmware_pio(ha);
    else
        err = qla1280_load_firmware_dma(ha);
    if (err)
        goto out;
    err = qla1280_start_firmware(ha);
 out:
    return err;
}

/*
 * Initialize rings
 *
 * Input:
 *      ha                = adapter block pointer.
 *      ha->request_ring  = request ring virtual address
 *      ha->response_ring = response ring virtual address
 *      ha->request_dma   = request ring physical address
 *      ha->response_dma  = response ring physical address
 *
 * Returns:
 *      0 = success.
 */
static int
qla1280_init_rings(struct scsi_qla_host *ha)
{
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    int status = 0;

    ENTER("qla1280_init_rings");

    /* Clear outstanding commands array. */
    memset(ha->outstanding_cmds, 0,
           sizeof(struct srb *) * MAX_OUTSTANDING_COMMANDS);

    /* Initialize request queue. */
    ha->request_ring_ptr = ha->request_ring;
    ha->req_ring_index = 0;
    ha->req_q_cnt = REQUEST_ENTRY_CNT;
    /* mb[0] = MBC_INIT_REQUEST_QUEUE; */
    mb[0] = MBC_INIT_REQUEST_QUEUE_A64;
    mb[1] = REQUEST_ENTRY_CNT;
    mb[3] = ha->request_dma & 0xffff;
    mb[2] = (ha->request_dma >> 16) & 0xffff;
    mb[4] = 0;
    mb[7] = pci_dma_hi32(ha->request_dma) & 0xffff;
    mb[6] = pci_dma_hi32(ha->request_dma) >> 16;
    if (!(status = qla1280_mailbox_command(ha, BIT_7 | BIT_6 | BIT_4 |
                           BIT_3 | BIT_2 | BIT_1 | BIT_0,
                           &mb[0]))) {
        /* Initialize response queue. */
        ha->response_ring_ptr = ha->response_ring;
        ha->rsp_ring_index = 0;
        /* mb[0] = MBC_INIT_RESPONSE_QUEUE; */
        mb[0] = MBC_INIT_RESPONSE_QUEUE_A64;
        mb[1] = RESPONSE_ENTRY_CNT;
        mb[3] = ha->response_dma & 0xffff;
        mb[2] = (ha->response_dma >> 16) & 0xffff;
        mb[5] = 0;
        mb[7] = pci_dma_hi32(ha->response_dma) & 0xffff;
        mb[6] = pci_dma_hi32(ha->response_dma) >> 16;
        status = qla1280_mailbox_command(ha, BIT_7 | BIT_6 | BIT_5 |
                         BIT_3 | BIT_2 | BIT_1 | BIT_0,
                         &mb[0]);
    }

    if (status)
        dprintk(2, "qla1280_init_rings: **** FAILED ****\n");

    LEAVE("qla1280_init_rings");
    return status;
}

static void
qla1280_print_settings(struct nvram *nv)
{
    dprintk(1, "qla1280 : initiator scsi id bus[0]=%d\n",
        nv->bus[0].config_1.initiator_id);
    dprintk(1, "qla1280 : initiator scsi id bus[1]=%d\n",
        nv->bus[1].config_1.initiator_id);

    dprintk(1, "qla1280 : bus reset delay[0]=%d\n",
        nv->bus[0].bus_reset_delay);
    dprintk(1, "qla1280 : bus reset delay[1]=%d\n",
        nv->bus[1].bus_reset_delay);

    dprintk(1, "qla1280 : retry count[0]=%d\n", nv->bus[0].retry_count);
    dprintk(1, "qla1280 : retry delay[0]=%d\n", nv->bus[0].retry_delay);
    dprintk(1, "qla1280 : retry count[1]=%d\n", nv->bus[1].retry_count);
    dprintk(1, "qla1280 : retry delay[1]=%d\n", nv->bus[1].retry_delay);

    dprintk(1, "qla1280 : async data setup time[0]=%d\n",
        nv->bus[0].config_2.async_data_setup_time);
    dprintk(1, "qla1280 : async data setup time[1]=%d\n",
        nv->bus[1].config_2.async_data_setup_time);

    dprintk(1, "qla1280 : req/ack active negation[0]=%d\n",
        nv->bus[0].config_2.req_ack_active_negation);
    dprintk(1, "qla1280 : req/ack active negation[1]=%d\n",
        nv->bus[1].config_2.req_ack_active_negation);

    dprintk(1, "qla1280 : data line active negation[0]=%d\n",
        nv->bus[0].config_2.data_line_active_negation);
    dprintk(1, "qla1280 : data line active negation[1]=%d\n",
        nv->bus[1].config_2.data_line_active_negation);

    dprintk(1, "qla1280 : disable loading risc code=%d\n",
        nv->cntr_flags_1.disable_loading_risc_code);

    dprintk(1, "qla1280 : enable 64bit addressing=%d\n",
        nv->cntr_flags_1.enable_64bit_addressing);

    dprintk(1, "qla1280 : selection timeout limit[0]=%d\n",
        nv->bus[0].selection_timeout);
    dprintk(1, "qla1280 : selection timeout limit[1]=%d\n",
        nv->bus[1].selection_timeout);

    dprintk(1, "qla1280 : max queue depth[0]=%d\n",
        nv->bus[0].max_queue_depth);
    dprintk(1, "qla1280 : max queue depth[1]=%d\n",
        nv->bus[1].max_queue_depth);
}

static void
qla1280_set_target_defaults(struct scsi_qla_host *ha, int bus, int target)
{
    struct nvram *nv = &ha->nvram;

    nv->bus[bus].target[target].parameter.renegotiate_on_error = 1;
    nv->bus[bus].target[target].parameter.auto_request_sense = 1;
    nv->bus[bus].target[target].parameter.tag_queuing = 1;
    nv->bus[bus].target[target].parameter.enable_sync = 1;
#if 1   /* Some SCSI Processors do not seem to like this */
    nv->bus[bus].target[target].parameter.enable_wide = 1;
#endif
    nv->bus[bus].target[target].execution_throttle =
        nv->bus[bus].max_queue_depth - 1;
    nv->bus[bus].target[target].parameter.parity_checking = 1;
    nv->bus[bus].target[target].parameter.disconnect_allowed = 1;

    if (IS_ISP1x160(ha)) {
        nv->bus[bus].target[target].flags.flags1x160.device_enable = 1;
        nv->bus[bus].target[target].flags.flags1x160.sync_offset = 0x0e;
        nv->bus[bus].target[target].sync_period = 9;
        nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr = 1;
        nv->bus[bus].target[target].ppr_1x160.flags.ppr_options = 2;
        nv->bus[bus].target[target].ppr_1x160.flags.ppr_bus_width = 1;
    } else {
        nv->bus[bus].target[target].flags.flags1x80.device_enable = 1;
        nv->bus[bus].target[target].flags.flags1x80.sync_offset = 12;
        nv->bus[bus].target[target].sync_period = 10;
    }
}

static void
qla1280_set_defaults(struct scsi_qla_host *ha)
{
    struct nvram *nv = &ha->nvram;
    int bus, target;

    dprintk(1, "Using defaults for NVRAM: \n");
    memset(nv, 0, sizeof(struct nvram));

    /* nv->cntr_flags_1.disable_loading_risc_code = 1; */
    nv->firmware_feature.f.enable_fast_posting = 1;
    nv->firmware_feature.f.disable_synchronous_backoff = 1;
    nv->termination.scsi_bus_0_control = 3;
    nv->termination.scsi_bus_1_control = 3;
    nv->termination.auto_term_support = 1;

    /*
     * Set default FIFO magic - What appropriate values would be here
     * is unknown. This is what I have found testing with 12160s.
     *
     * Now, I would love the magic decoder ring for this one, the
     * header file provided by QLogic seems to be bogus or incomplete
     * at best.
     */
    nv->isp_config.burst_enable = 1;
    if (IS_ISP1040(ha))
        nv->isp_config.fifo_threshold |= 3;
    else
        nv->isp_config.fifo_threshold |= 4;

    if (IS_ISP1x160(ha))
        nv->isp_parameter = 0x01; /* fast memory enable */

    for (bus = 0; bus < MAX_BUSES; bus++) {
        nv->bus[bus].config_1.initiator_id = 7;
        nv->bus[bus].config_2.req_ack_active_negation = 1;
        nv->bus[bus].config_2.data_line_active_negation = 1;
        nv->bus[bus].selection_timeout = 250;
        nv->bus[bus].max_queue_depth = 32;

        if (IS_ISP1040(ha)) {
            nv->bus[bus].bus_reset_delay = 3;
            nv->bus[bus].config_2.async_data_setup_time = 6;
            nv->bus[bus].retry_delay = 1;
        } else {
            nv->bus[bus].bus_reset_delay = 5;
            nv->bus[bus].config_2.async_data_setup_time = 8;
        }

        for (target = 0; target < MAX_TARGETS; target++)
            qla1280_set_target_defaults(ha, bus, target);
    }
}

static int
qla1280_config_target(struct scsi_qla_host *ha, int bus, int target)
{
    struct nvram *nv = &ha->nvram;
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    int status, lun;
    uint16_t flag;

    /* Set Target Parameters. */
    mb[0] = MBC_SET_TARGET_PARAMETERS;
    mb[1] = (uint16_t)((bus ? target | BIT_7 : target) << 8);

    /*
     * Do not enable sync and ppr for the initial INQUIRY run. We
     * enable this later if we determine the target actually
     * supports it.
     */
    mb[2] = (TP_RENEGOTIATE | TP_AUTO_REQUEST_SENSE | TP_TAGGED_QUEUE
         | TP_WIDE | TP_PARITY | TP_DISCONNECT);

    if (IS_ISP1x160(ha))
        mb[3] = nv->bus[bus].target[target].flags.flags1x160.sync_offset << 8;
    else
        mb[3] = nv->bus[bus].target[target].flags.flags1x80.sync_offset << 8;
    mb[3] |= nv->bus[bus].target[target].sync_period;
    status = qla1280_mailbox_command(ha, 0x0f, mb);

    /* Save Tag queuing enable flag. */
    flag = (BIT_0 << target);
    if (nv->bus[bus].target[target].parameter.tag_queuing)
        ha->bus_settings[bus].qtag_enables |= flag;

    /* Save Device enable flag. */
    if (IS_ISP1x160(ha)) {
        if (nv->bus[bus].target[target].flags.flags1x160.device_enable)
            ha->bus_settings[bus].device_enables |= flag;
        ha->bus_settings[bus].lun_disables |= 0;
    } else {
        if (nv->bus[bus].target[target].flags.flags1x80.device_enable)
            ha->bus_settings[bus].device_enables |= flag;
        /* Save LUN disable flag. */
        if (nv->bus[bus].target[target].flags.flags1x80.lun_disable)
            ha->bus_settings[bus].lun_disables |= flag;
    }

    /* Set Device Queue Parameters. */
    for (lun = 0; lun < MAX_LUNS; lun++) {
        mb[0] = MBC_SET_DEVICE_QUEUE;
        mb[1] = (uint16_t)((bus ? target | BIT_7 : target) << 8);
        mb[1] |= lun;
        mb[2] = nv->bus[bus].max_queue_depth;
        mb[3] = nv->bus[bus].target[target].execution_throttle;
        status |= qla1280_mailbox_command(ha, 0x0f, mb);
    }

    return status;
}

static int
qla1280_config_bus(struct scsi_qla_host *ha, int bus)
{
    struct nvram *nv = &ha->nvram;
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    int target, status;

    /* SCSI Reset Disable. */
    ha->bus_settings[bus].disable_scsi_reset =
        nv->bus[bus].config_1.scsi_reset_disable;

    /* Initiator ID. */
    ha->bus_settings[bus].id = nv->bus[bus].config_1.initiator_id;
    mb[0] = MBC_SET_INITIATOR_ID;
    mb[1] = bus ? ha->bus_settings[bus].id | BIT_7 :
        ha->bus_settings[bus].id;
    status = qla1280_mailbox_command(ha, BIT_1 | BIT_0, &mb[0]);

    /* Reset Delay. */
    ha->bus_settings[bus].bus_reset_delay =
        nv->bus[bus].bus_reset_delay;

    /* Command queue depth per device. */
    ha->bus_settings[bus].hiwat = nv->bus[bus].max_queue_depth - 1;

    /* Set target parameters. */
    for (target = 0; target < MAX_TARGETS; target++)
        status |= qla1280_config_target(ha, bus, target);

    return status;
}

static int
qla1280_nvram_config(struct scsi_qla_host *ha)
{
    struct device_reg __iomem *reg = ha->iobase;
    struct nvram *nv = &ha->nvram;
    int bus, target, status = 0;
    uint16_t mb[MAILBOX_REGISTER_COUNT];

    ENTER("qla1280_nvram_config");

    if (ha->nvram_valid) {
        /* Always force AUTO sense for LINUX SCSI */
        for (bus = 0; bus < MAX_BUSES; bus++)
            for (target = 0; target < MAX_TARGETS; target++) {
                nv->bus[bus].target[target].parameter.
                    auto_request_sense = 1;
            }
    } else {
        qla1280_set_defaults(ha);
    }

    qla1280_print_settings(nv);

    /* Disable RISC load of firmware. */
    ha->flags.disable_risc_code_load =
        nv->cntr_flags_1.disable_loading_risc_code;

    if (IS_ISP1040(ha)) {
        uint16_t hwrev, cfg1, cdma_conf, ddma_conf;

        hwrev = RD_REG_WORD(&reg->cfg_0) & ISP_CFG0_HWMSK;

        cfg1 = RD_REG_WORD(&reg->cfg_1) & ~(BIT_4 | BIT_5 | BIT_6);
        cdma_conf = RD_REG_WORD(&reg->cdma_cfg);
        ddma_conf = RD_REG_WORD(&reg->ddma_cfg);

        /* Busted fifo, says mjacob. */
        if (hwrev != ISP_CFG0_1040A)
            cfg1 |= nv->isp_config.fifo_threshold << 4;

        cfg1 |= nv->isp_config.burst_enable << 2;
        WRT_REG_WORD(&reg->cfg_1, cfg1);

        WRT_REG_WORD(&reg->cdma_cfg, cdma_conf | CDMA_CONF_BENAB);
        WRT_REG_WORD(&reg->ddma_cfg, cdma_conf | DDMA_CONF_BENAB);
    } else {
        uint16_t cfg1, term;

        /* Set ISP hardware DMA burst */
        cfg1 = nv->isp_config.fifo_threshold << 4;
        cfg1 |= nv->isp_config.burst_enable << 2;
        /* Enable DMA arbitration on dual channel controllers */
        if (ha->ports > 1)
            cfg1 |= BIT_13;
        WRT_REG_WORD(&reg->cfg_1, cfg1);

        /* Set SCSI termination. */
        WRT_REG_WORD(&reg->gpio_enable,
                 BIT_7 | BIT_3 | BIT_2 | BIT_1 | BIT_0);
        term = nv->termination.scsi_bus_1_control;
        term |= nv->termination.scsi_bus_0_control << 2;
        term |= nv->termination.auto_term_support << 7;
        RD_REG_WORD(&reg->id_l);    /* Flush PCI write */
        WRT_REG_WORD(&reg->gpio_data, term);
    }
    RD_REG_WORD(&reg->id_l);    /* Flush PCI write */

    /* ISP parameter word. */
    mb[0] = MBC_SET_SYSTEM_PARAMETER;
    mb[1] = nv->isp_parameter;
    status |= qla1280_mailbox_command(ha, BIT_1 | BIT_0, &mb[0]);

    if (IS_ISP1x40(ha)) {
        /* clock rate - for qla1240 and older, only */
        mb[0] = MBC_SET_CLOCK_RATE;
        mb[1] = 40;
        status |= qla1280_mailbox_command(ha, BIT_1 | BIT_0, mb);
    }

    /* Firmware feature word. */
    mb[0] = MBC_SET_FIRMWARE_FEATURES;
    mb[1] = nv->firmware_feature.f.enable_fast_posting;
    mb[1] |= nv->firmware_feature.f.report_lvd_bus_transition << 1;
    mb[1] |= nv->firmware_feature.f.disable_synchronous_backoff << 5;
#if defined(CONFIG_IA64_GENERIC) || defined (CONFIG_IA64_SGI_SN2)
    if (ia64_platform_is("sn2")) {
        printk(KERN_INFO "scsi(%li): Enabling SN2 PCI DMA "
               "workaround\n", ha->host_no);
        mb[1] |= nv->firmware_feature.f.unused_9 << 9; /* XXX */
    }
#endif
    status |= qla1280_mailbox_command(ha, BIT_1 | BIT_0, mb);

    /* Retry count and delay. */
    mb[0] = MBC_SET_RETRY_COUNT;
    mb[1] = nv->bus[0].retry_count;
    mb[2] = nv->bus[0].retry_delay;
    mb[6] = nv->bus[1].retry_count;
    mb[7] = nv->bus[1].retry_delay;
    status |= qla1280_mailbox_command(ha, BIT_7 | BIT_6 | BIT_2 |
                      BIT_1 | BIT_0, &mb[0]);

    /* ASYNC data setup time. */
    mb[0] = MBC_SET_ASYNC_DATA_SETUP;
    mb[1] = nv->bus[0].config_2.async_data_setup_time;
    mb[2] = nv->bus[1].config_2.async_data_setup_time;
    status |= qla1280_mailbox_command(ha, BIT_2 | BIT_1 | BIT_0, &mb[0]);

    /* Active negation states. */
    mb[0] = MBC_SET_ACTIVE_NEGATION;
    mb[1] = 0;
    if (nv->bus[0].config_2.req_ack_active_negation)
        mb[1] |= BIT_5;
    if (nv->bus[0].config_2.data_line_active_negation)
        mb[1] |= BIT_4;
    mb[2] = 0;
    if (nv->bus[1].config_2.req_ack_active_negation)
        mb[2] |= BIT_5;
    if (nv->bus[1].config_2.data_line_active_negation)
        mb[2] |= BIT_4;
    status |= qla1280_mailbox_command(ha, BIT_2 | BIT_1 | BIT_0, mb);

    mb[0] = MBC_SET_DATA_OVERRUN_RECOVERY;
    mb[1] = 2;  /* Reset SCSI bus and return all outstanding IO */
    status |= qla1280_mailbox_command(ha, BIT_1 | BIT_0, mb);

    /* thingy */
    mb[0] = MBC_SET_PCI_CONTROL;
    mb[1] = BIT_1;  /* Data DMA Channel Burst Enable */
    mb[2] = BIT_1;  /* Command DMA Channel Burst Enable */
    status |= qla1280_mailbox_command(ha, BIT_2 | BIT_1 | BIT_0, mb);

    mb[0] = MBC_SET_TAG_AGE_LIMIT;
    mb[1] = 8;
    status |= qla1280_mailbox_command(ha, BIT_1 | BIT_0, mb);

    /* Selection timeout. */
    mb[0] = MBC_SET_SELECTION_TIMEOUT;
    mb[1] = nv->bus[0].selection_timeout;
    mb[2] = nv->bus[1].selection_timeout;
    status |= qla1280_mailbox_command(ha, BIT_2 | BIT_1 | BIT_0, mb);

    for (bus = 0; bus < ha->ports; bus++)
        status |= qla1280_config_bus(ha, bus);

    if (status)
        dprintk(2, "qla1280_nvram_config: **** FAILED ****\n");

    LEAVE("qla1280_nvram_config");
    return status;
}

/*
 * Get NVRAM data word
 *      Calculates word position in NVRAM and calls request routine to
 *      get the word from NVRAM.
 *
 * Input:
 *      ha      = adapter block pointer.
 *      address = NVRAM word address.
 *
 * Returns:
 *      data word.
 */
static uint16_t
qla1280_get_nvram_word(struct scsi_qla_host *ha, uint32_t address)
{
    uint32_t nv_cmd;
    uint16_t data;

    nv_cmd = address << 16;
    nv_cmd |= NV_READ_OP;

    data = le16_to_cpu(qla1280_nvram_request(ha, nv_cmd));

    dprintk(8, "qla1280_get_nvram_word: exiting normally NVRAM data = "
        "0x%x", data);

    return data;
}

/*
 * NVRAM request
 *      Sends read command to NVRAM and gets data from NVRAM.
 *
 * Input:
 *      ha     = adapter block pointer.
 *      nv_cmd = Bit 26     = start bit
 *               Bit 25, 24 = opcode
 *               Bit 23-16  = address
 *               Bit 15-0   = write data
 *
 * Returns:
 *      data word.
 */
static uint16_t
qla1280_nvram_request(struct scsi_qla_host *ha, uint32_t nv_cmd)
{
    struct device_reg __iomem *reg = ha->iobase;
    int cnt;
    uint16_t data = 0;
    uint16_t reg_data;

    /* Send command to NVRAM. */

    nv_cmd <<= 5;
    for (cnt = 0; cnt < 11; cnt++) {
        if (nv_cmd & BIT_31)
            qla1280_nv_write(ha, NV_DATA_OUT);
        else
            qla1280_nv_write(ha, 0);
        nv_cmd <<= 1;
    }

    /* Read data from NVRAM. */

    for (cnt = 0; cnt < 16; cnt++) {
        WRT_REG_WORD(&reg->nvram, (NV_SELECT | NV_CLOCK));
        RD_REG_WORD(&reg->id_l);    /* Flush PCI write */
        NVRAM_DELAY();
        data <<= 1;
        reg_data = RD_REG_WORD(&reg->nvram);
        if (reg_data & NV_DATA_IN)
            data |= BIT_0;
        WRT_REG_WORD(&reg->nvram, NV_SELECT);
        RD_REG_WORD(&reg->id_l);    /* Flush PCI write */
        NVRAM_DELAY();
    }

    /* Deselect chip. */

    WRT_REG_WORD(&reg->nvram, NV_DESELECT);
    RD_REG_WORD(&reg->id_l);    /* Flush PCI write */
    NVRAM_DELAY();

    return data;
}

static void
qla1280_nv_write(struct scsi_qla_host *ha, uint16_t data)
{
    struct device_reg __iomem *reg = ha->iobase;

    WRT_REG_WORD(&reg->nvram, data | NV_SELECT);
    RD_REG_WORD(&reg->id_l);    /* Flush PCI write */
    NVRAM_DELAY();
    WRT_REG_WORD(&reg->nvram, data | NV_SELECT | NV_CLOCK);
    RD_REG_WORD(&reg->id_l);    /* Flush PCI write */
    NVRAM_DELAY();
    WRT_REG_WORD(&reg->nvram, data | NV_SELECT);
    RD_REG_WORD(&reg->id_l);    /* Flush PCI write */
    NVRAM_DELAY();
}

/*
 * Mailbox Command
 *      Issue mailbox command and waits for completion.
 *
 * Input:
 *      ha = adapter block pointer.
 *      mr = mailbox registers to load.
 *      mb = data pointer for mailbox registers.
 *
 * Output:
 *      mb[MAILBOX_REGISTER_COUNT] = returned mailbox data.
 *
 * Returns:
 *      0 = success
 */
static int
qla1280_mailbox_command(struct scsi_qla_host *ha, uint8_t mr, uint16_t *mb)
{
    struct device_reg __iomem *reg = ha->iobase;
    int status = 0;
    int cnt;
    uint16_t *optr, *iptr;
    uint16_t __iomem *mptr;
    uint16_t data;
    DECLARE_COMPLETION_ONSTACK(wait);
    struct timer_list timer;

    ENTER("qla1280_mailbox_command");

    if (ha->mailbox_wait) {
        printk(KERN_ERR "Warning mailbox wait already in use!\n");
    }
    ha->mailbox_wait = &wait;

    /*
     * We really should start out by verifying that the mailbox is
     * available before starting sending the command data
     */
    /* Load mailbox registers. */
    mptr = (uint16_t __iomem *) &reg->mailbox0;
    iptr = mb;
    for (cnt = 0; cnt < MAILBOX_REGISTER_COUNT; cnt++) {
        if (mr & BIT_0) {
            WRT_REG_WORD(mptr, (*iptr));
        }

        mr >>= 1;
        mptr++;
        iptr++;
    }

    /* Issue set host interrupt command. */

    /* set up a timer just in case we're really jammed */
    init_timer(&timer);
    timer.expires = jiffies + 20*HZ;
    timer.data = (unsigned long)ha;
    timer.function = qla1280_mailbox_timeout;
    add_timer(&timer);

    spin_unlock_irq(ha->host->host_lock);
    WRT_REG_WORD(&reg->host_cmd, HC_SET_HOST_INT);
    data = qla1280_debounce_register(&reg->istatus);

    wait_for_completion(&wait);
    del_timer_sync(&timer);

    spin_lock_irq(ha->host->host_lock);

    ha->mailbox_wait = NULL;

    /* Check for mailbox command timeout. */
    if (ha->mailbox_out[0] != MBS_CMD_CMP) {
        printk(KERN_WARNING "qla1280_mailbox_command: Command failed, "
               "mailbox0 = 0x%04x, mailbox_out0 = 0x%04x, istatus = "
               "0x%04x\n", 
               mb[0], ha->mailbox_out[0], RD_REG_WORD(&reg->istatus));
        printk(KERN_WARNING "m0 %04x, m1 %04x, m2 %04x, m3 %04x\n",
               RD_REG_WORD(&reg->mailbox0), RD_REG_WORD(&reg->mailbox1),
               RD_REG_WORD(&reg->mailbox2), RD_REG_WORD(&reg->mailbox3));
        printk(KERN_WARNING "m4 %04x, m5 %04x, m6 %04x, m7 %04x\n",
               RD_REG_WORD(&reg->mailbox4), RD_REG_WORD(&reg->mailbox5),
               RD_REG_WORD(&reg->mailbox6), RD_REG_WORD(&reg->mailbox7));
        status = 1;
    }

    /* Load return mailbox registers. */
    optr = mb;
    iptr = (uint16_t *) &ha->mailbox_out[0];
    mr = MAILBOX_REGISTER_COUNT;
    memcpy(optr, iptr, MAILBOX_REGISTER_COUNT * sizeof(uint16_t));

    if (ha->flags.reset_marker)
        qla1280_rst_aen(ha);

    if (status)
        dprintk(2, "qla1280_mailbox_command: **** FAILED, mailbox0 = "
            "0x%x ****\n", mb[0]);

    LEAVE("qla1280_mailbox_command");
    return status;
}

/*
 * qla1280_poll
 *      Polls ISP for interrupts.
 *
 * Input:
 *      ha = adapter block pointer.
 */
static void
qla1280_poll(struct scsi_qla_host *ha)
{
    struct device_reg __iomem *reg = ha->iobase;
    uint16_t data;
    LIST_HEAD(done_q);

    /* ENTER("qla1280_poll"); */

    /* Check for pending interrupts. */
    data = RD_REG_WORD(&reg->istatus);
    if (data & RISC_INT)
        qla1280_isr(ha, &done_q);

    if (!ha->mailbox_wait) {
        if (ha->flags.reset_marker)
            qla1280_rst_aen(ha);
    }

    if (!list_empty(&done_q))
        qla1280_done(ha);

    /* LEAVE("qla1280_poll"); */
}

/*
 * qla1280_bus_reset
 *      Issue SCSI bus reset.
 *
 * Input:
 *      ha  = adapter block pointer.
 *      bus = SCSI bus number.
 *
 * Returns:
 *      0 = success
 */
static int
qla1280_bus_reset(struct scsi_qla_host *ha, int bus)
{
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    uint16_t reset_delay;
    int status;

    dprintk(3, "qla1280_bus_reset: entered\n");

    if (qla1280_verbose)
        printk(KERN_INFO "scsi(%li:%i): Resetting SCSI BUS\n",
               ha->host_no, bus);

    reset_delay = ha->bus_settings[bus].bus_reset_delay;
    mb[0] = MBC_BUS_RESET;
    mb[1] = reset_delay;
    mb[2] = (uint16_t) bus;
    status = qla1280_mailbox_command(ha, BIT_2 | BIT_1 | BIT_0, &mb[0]);

    if (status) {
        if (ha->bus_settings[bus].failed_reset_count > 2)
            ha->bus_settings[bus].scsi_bus_dead = 1;
        ha->bus_settings[bus].failed_reset_count++;
    } else {
        spin_unlock_irq(ha->host->host_lock);
        ssleep(reset_delay);
        spin_lock_irq(ha->host->host_lock);

        ha->bus_settings[bus].scsi_bus_dead = 0;
        ha->bus_settings[bus].failed_reset_count = 0;
        ha->bus_settings[bus].reset_marker = 0;
        /* Issue marker command. */
        qla1280_marker(ha, bus, 0, 0, MK_SYNC_ALL);
    }

    /*
     * We should probably call qla1280_set_target_parameters()
     * here as well for all devices on the bus.
     */

    if (status)
        dprintk(2, "qla1280_bus_reset: **** FAILED ****\n");
    else
        dprintk(3, "qla1280_bus_reset: exiting normally\n");

    return status;
}

/*
 * qla1280_device_reset
 *      Issue bus device reset message to the target.
 *
 * Input:
 *      ha      = adapter block pointer.
 *      bus     = SCSI BUS number.
 *      target  = SCSI ID.
 *
 * Returns:
 *      0 = success
 */
static int
qla1280_device_reset(struct scsi_qla_host *ha, int bus, int target)
{
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    int status;

    ENTER("qla1280_device_reset");

    mb[0] = MBC_ABORT_TARGET;
    mb[1] = (bus ? (target | BIT_7) : target) << 8;
    mb[2] = 1;
    status = qla1280_mailbox_command(ha, BIT_2 | BIT_1 | BIT_0, &mb[0]);

    /* Issue marker command. */
    qla1280_marker(ha, bus, target, 0, MK_SYNC_ID);

    if (status)
        dprintk(2, "qla1280_device_reset: **** FAILED ****\n");

    LEAVE("qla1280_device_reset");
    return status;
}

/*
 * qla1280_abort_command
 *      Abort command aborts a specified IOCB.
 *
 * Input:
 *      ha = adapter block pointer.
 *      sp = SB structure pointer.
 *
 * Returns:
 *      0 = success
 */
static int
qla1280_abort_command(struct scsi_qla_host *ha, struct srb * sp, int handle)
{
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    unsigned int bus, target, lun;
    int status;

    ENTER("qla1280_abort_command");

    bus = SCSI_BUS_32(sp->cmd);
    target = SCSI_TCN_32(sp->cmd);
    lun = SCSI_LUN_32(sp->cmd);

    sp->flags |= SRB_ABORT_PENDING;

    mb[0] = MBC_ABORT_COMMAND;
    mb[1] = (bus ? target | BIT_7 : target) << 8 | lun;
    mb[2] = handle >> 16;
    mb[3] = handle & 0xffff;
    status = qla1280_mailbox_command(ha, 0x0f, &mb[0]);

    if (status) {
        dprintk(2, "qla1280_abort_command: **** FAILED ****\n");
        sp->flags &= ~SRB_ABORT_PENDING;
    }


    LEAVE("qla1280_abort_command");
    return status;
}

/*
 * qla1280_reset_adapter
 *      Reset adapter.
 *
 * Input:
 *      ha = adapter block pointer.
 */
static void
qla1280_reset_adapter(struct scsi_qla_host *ha)
{
    struct device_reg __iomem *reg = ha->iobase;

    ENTER("qla1280_reset_adapter");

    /* Disable ISP chip */
    ha->flags.online = 0;
    WRT_REG_WORD(&reg->ictrl, ISP_RESET);
    WRT_REG_WORD(&reg->host_cmd,
             HC_RESET_RISC | HC_RELEASE_RISC | HC_DISABLE_BIOS);
    RD_REG_WORD(&reg->id_l);    /* Flush PCI write */

    LEAVE("qla1280_reset_adapter");
}

/*
 *  Issue marker command.
 *      Function issues marker IOCB.
 *
 * Input:
 *      ha   = adapter block pointer.
 *      bus  = SCSI BUS number
 *      id   = SCSI ID
 *      lun  = SCSI LUN
 *      type = marker modifier
 */
static void
qla1280_marker(struct scsi_qla_host *ha, int bus, int id, int lun, u8 type)
{
    struct mrk_entry *pkt;

    ENTER("qla1280_marker");

    /* Get request packet. */
    if ((pkt = (struct mrk_entry *) qla1280_req_pkt(ha))) {
        pkt->entry_type = MARKER_TYPE;
        pkt->lun = (uint8_t) lun;
        pkt->target = (uint8_t) (bus ? (id | BIT_7) : id);
        pkt->modifier = type;
        pkt->entry_status = 0;

        /* Issue command to ISP */
        qla1280_isp_cmd(ha);
    }

    LEAVE("qla1280_marker");
}


/*
 * qla1280_64bit_start_scsi
 *      The start SCSI is responsible for building request packets on
 *      request ring and modifying ISP input pointer.
 *
 * Input:
 *      ha = adapter block pointer.
 *      sp = SB structure pointer.
 *
 * Returns:
 *      0 = success, was able to issue command.
 */
#ifdef QLA_64BIT_PTR
static int
qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
{
    struct device_reg __iomem *reg = ha->iobase;
    struct scsi_cmnd *cmd = sp->cmd;
    cmd_a64_entry_t *pkt;
    __le32 *dword_ptr;
    dma_addr_t dma_handle;
    int status = 0;
    int cnt;
    int req_cnt;
    int seg_cnt;
    u8 dir;

    ENTER("qla1280_64bit_start_scsi:");

    /* Calculate number of entries and segments required. */
    req_cnt = 1;
    seg_cnt = scsi_dma_map(cmd);
    if (seg_cnt > 0) {
        if (seg_cnt > 2) {
            req_cnt += (seg_cnt - 2) / 5;
            if ((seg_cnt - 2) % 5)
                req_cnt++;
        }
    } else if (seg_cnt < 0) {
        status = 1;
        goto out;
    }

    if ((req_cnt + 2) >= ha->req_q_cnt) {
        /* Calculate number of free request entries. */
        cnt = RD_REG_WORD(&reg->mailbox4);
        if (ha->req_ring_index < cnt)
            ha->req_q_cnt = cnt - ha->req_ring_index;
        else
            ha->req_q_cnt =
                REQUEST_ENTRY_CNT - (ha->req_ring_index - cnt);
    }

    dprintk(3, "Number of free entries=(%d) seg_cnt=0x%x\n",
        ha->req_q_cnt, seg_cnt);

    /* If room for request in request ring. */
    if ((req_cnt + 2) >= ha->req_q_cnt) {
        status = SCSI_MLQUEUE_HOST_BUSY;
        dprintk(2, "qla1280_start_scsi: in-ptr=0x%x  req_q_cnt="
            "0x%xreq_cnt=0x%x", ha->req_ring_index, ha->req_q_cnt,
            req_cnt);
        goto out;
    }

    /* Check for room in outstanding command list. */
    for (cnt = 0; cnt < MAX_OUTSTANDING_COMMANDS &&
             ha->outstanding_cmds[cnt] != NULL; cnt++);

    if (cnt >= MAX_OUTSTANDING_COMMANDS) {
        status = SCSI_MLQUEUE_HOST_BUSY;
        dprintk(2, "qla1280_start_scsi: NO ROOM IN "
            "OUTSTANDING ARRAY, req_q_cnt=0x%x", ha->req_q_cnt);
        goto out;
    }

    ha->outstanding_cmds[cnt] = sp;
    ha->req_q_cnt -= req_cnt;
    CMD_HANDLE(sp->cmd) = (unsigned char *)(unsigned long)(cnt + 1);

    dprintk(2, "start: cmd=%p sp=%p CDB=%xm, handle %lx\n", cmd, sp,
        cmd->cmnd[0], (long)CMD_HANDLE(sp->cmd));
    dprintk(2, "             bus %i, target %i, lun %i\n",
        SCSI_BUS_32(cmd), SCSI_TCN_32(cmd), SCSI_LUN_32(cmd));
    qla1280_dump_buffer(2, cmd->cmnd, MAX_COMMAND_SIZE);

    /*
     * Build command packet.
     */
    pkt = (cmd_a64_entry_t *) ha->request_ring_ptr;

    pkt->entry_type = COMMAND_A64_TYPE;
    pkt->entry_count = (uint8_t) req_cnt;
    pkt->sys_define = (uint8_t) ha->req_ring_index;
    pkt->entry_status = 0;
    pkt->handle = cpu_to_le32(cnt);

    /* Zero out remaining portion of packet. */
    memset(((char *)pkt + 8), 0, (REQUEST_ENTRY_SIZE - 8));

    /* Set ISP command timeout. */
    pkt->timeout = cpu_to_le16(cmd->request->timeout/HZ);

    /* Set device target ID and LUN */
    pkt->lun = SCSI_LUN_32(cmd);
    pkt->target = SCSI_BUS_32(cmd) ?
        (SCSI_TCN_32(cmd) | BIT_7) : SCSI_TCN_32(cmd);

    /* Enable simple tag queuing if device supports it. */
    if (cmd->device->simple_tags)
        pkt->control_flags |= cpu_to_le16(BIT_3);

    /* Load SCSI command packet. */
    pkt->cdb_len = cpu_to_le16(CMD_CDBLEN(cmd));
    memcpy(pkt->scsi_cdb, CMD_CDBP(cmd), CMD_CDBLEN(cmd));
    /* dprintk(1, "Build packet for command[0]=0x%x\n",pkt->scsi_cdb[0]); */

    /* Set transfer direction. */
    dir = qla1280_data_direction(cmd);
    pkt->control_flags |= cpu_to_le16(dir);

    /* Set total data segment count. */
    pkt->dseg_count = cpu_to_le16(seg_cnt);

    /*
     * Load data segments.
     */
    if (seg_cnt) {  /* If data transfer. */
        struct scatterlist *sg, *s;
        int remseg = seg_cnt;

        sg = scsi_sglist(cmd);

        /* Setup packet address segment pointer. */
        dword_ptr = (u32 *)&pkt->dseg_0_address;

        /* Load command entry data segments. */
        for_each_sg(sg, s, seg_cnt, cnt) {
            if (cnt == 2)
                break;

            dma_handle = sg_dma_address(s);
#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
            if (ha->flags.use_pci_vchannel)
                sn_pci_set_vchan(ha->pdev,
                         (unsigned long *)&dma_handle,
                         SCSI_BUS_32(cmd));
#endif
            *dword_ptr++ =
                cpu_to_le32(pci_dma_lo32(dma_handle));
            *dword_ptr++ =
                cpu_to_le32(pci_dma_hi32(dma_handle));
            *dword_ptr++ = cpu_to_le32(sg_dma_len(s));
            dprintk(3, "S/G Segment phys_addr=%x %x, len=0x%x\n",
                cpu_to_le32(pci_dma_hi32(dma_handle)),
                cpu_to_le32(pci_dma_lo32(dma_handle)),
                cpu_to_le32(sg_dma_len(sg_next(s))));
            remseg--;
        }
        dprintk(5, "qla1280_64bit_start_scsi: Scatter/gather "
            "command packet data - b %i, t %i, l %i \n",
            SCSI_BUS_32(cmd), SCSI_TCN_32(cmd),
            SCSI_LUN_32(cmd));
        qla1280_dump_buffer(5, (char *)pkt,
                    REQUEST_ENTRY_SIZE);

        /*
         * Build continuation packets.
         */
        dprintk(3, "S/G Building Continuation...seg_cnt=0x%x "
            "remains\n", seg_cnt);

        while (remseg > 0) {
            /* Update sg start */
            sg = s;
            /* Adjust ring index. */
            ha->req_ring_index++;
            if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
                ha->req_ring_index = 0;
                ha->request_ring_ptr =
                    ha->request_ring;
            } else
                ha->request_ring_ptr++;

            pkt = (cmd_a64_entry_t *)ha->request_ring_ptr;

            /* Zero out packet. */
            memset(pkt, 0, REQUEST_ENTRY_SIZE);

            /* Load packet defaults. */
            ((struct cont_a64_entry *) pkt)->entry_type =
                CONTINUE_A64_TYPE;
            ((struct cont_a64_entry *) pkt)->entry_count = 1;
            ((struct cont_a64_entry *) pkt)->sys_define =
                (uint8_t)ha->req_ring_index;
            /* Setup packet address segment pointer. */
            dword_ptr =
                (u32 *)&((struct cont_a64_entry *) pkt)->dseg_0_address;

            /* Load continuation entry data segments. */
            for_each_sg(sg, s, remseg, cnt) {
                if (cnt == 5)
                    break;
                dma_handle = sg_dma_address(s);
#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
                if (ha->flags.use_pci_vchannel)
                    sn_pci_set_vchan(ha->pdev,
                             (unsigned long *)&dma_handle,
                             SCSI_BUS_32(cmd));
#endif
                *dword_ptr++ =
                    cpu_to_le32(pci_dma_lo32(dma_handle));
                *dword_ptr++ =
                    cpu_to_le32(pci_dma_hi32(dma_handle));
                *dword_ptr++ =
                    cpu_to_le32(sg_dma_len(s));
                dprintk(3, "S/G Segment Cont. phys_addr=%x %x, len=0x%x\n",
                    cpu_to_le32(pci_dma_hi32(dma_handle)),
                    cpu_to_le32(pci_dma_lo32(dma_handle)),
                    cpu_to_le32(sg_dma_len(s)));
            }
            remseg -= cnt;
            dprintk(5, "qla1280_64bit_start_scsi: "
                "continuation packet data - b %i, t "
                "%i, l %i \n", SCSI_BUS_32(cmd),
                SCSI_TCN_32(cmd), SCSI_LUN_32(cmd));
            qla1280_dump_buffer(5, (char *)pkt,
                        REQUEST_ENTRY_SIZE);
        }
    } else {    /* No data transfer */
        dprintk(5, "qla1280_64bit_start_scsi: No data, command "
            "packet data - b %i, t %i, l %i \n",
            SCSI_BUS_32(cmd), SCSI_TCN_32(cmd), SCSI_LUN_32(cmd));
        qla1280_dump_buffer(5, (char *)pkt, REQUEST_ENTRY_SIZE);
    }
    /* Adjust ring index. */
    ha->req_ring_index++;
    if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
        ha->req_ring_index = 0;
        ha->request_ring_ptr = ha->request_ring;
    } else
        ha->request_ring_ptr++;

    /* Set chip new ring index. */
    dprintk(2,
        "qla1280_64bit_start_scsi: Wakeup RISC for pending command\n");
    sp->flags |= SRB_SENT;
    ha->actthreads++;
    WRT_REG_WORD(&reg->mailbox4, ha->req_ring_index);
    /* Enforce mmio write ordering; see comment in qla1280_isp_cmd(). */
    mmiowb();

 out:
    if (status)
        dprintk(2, "qla1280_64bit_start_scsi: **** FAILED ****\n");
    else
        dprintk(3, "qla1280_64bit_start_scsi: exiting normally\n");

    return status;
}
#else /* !QLA_64BIT_PTR */

/*
 * qla1280_32bit_start_scsi
 *      The start SCSI is responsible for building request packets on
 *      request ring and modifying ISP input pointer.
 *
 *      The Qlogic firmware interface allows every queue slot to have a SCSI
 *      command and up to 4 scatter/gather (SG) entries.  If we need more
 *      than 4 SG entries, then continuation entries are used that can
 *      hold another 7 entries each.  The start routine determines if there
 *      is eought empty slots then build the combination of requests to
 *      fulfill the OS request.
 *
 * Input:
 *      ha = adapter block pointer.
 *      sp = SCSI Request Block structure pointer.
 *
 * Returns:
 *      0 = success, was able to issue command.
 */
static int
qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
{
    struct device_reg __iomem *reg = ha->iobase;
    struct scsi_cmnd *cmd = sp->cmd;
    struct cmd_entry *pkt;
    __le32 *dword_ptr;
    int status = 0;
    int cnt;
    int req_cnt;
    int seg_cnt;
    u8 dir;

    ENTER("qla1280_32bit_start_scsi");

    dprintk(1, "32bit_start: cmd=%p sp=%p CDB=%x\n", cmd, sp,
        cmd->cmnd[0]);

    /* Calculate number of entries and segments required. */
    req_cnt = 1;
    seg_cnt = scsi_dma_map(cmd);
    if (seg_cnt) {
        /*
         * if greater than four sg entries then we need to allocate
         * continuation entries
         */
        if (seg_cnt > 4) {
            req_cnt += (seg_cnt - 4) / 7;
            if ((seg_cnt - 4) % 7)
                req_cnt++;
        }
        dprintk(3, "S/G Transfer cmd=%p seg_cnt=0x%x, req_cnt=%x\n",
            cmd, seg_cnt, req_cnt);
    } else if (seg_cnt < 0) {
        status = 1;
        goto out;
    }

    if ((req_cnt + 2) >= ha->req_q_cnt) {
        /* Calculate number of free request entries. */
        cnt = RD_REG_WORD(&reg->mailbox4);
        if (ha->req_ring_index < cnt)
            ha->req_q_cnt = cnt - ha->req_ring_index;
        else
            ha->req_q_cnt =
                REQUEST_ENTRY_CNT - (ha->req_ring_index - cnt);
    }

    dprintk(3, "Number of free entries=(%d) seg_cnt=0x%x\n",
        ha->req_q_cnt, seg_cnt);
    /* If room for request in request ring. */
    if ((req_cnt + 2) >= ha->req_q_cnt) {
        status = SCSI_MLQUEUE_HOST_BUSY;
        dprintk(2, "qla1280_32bit_start_scsi: in-ptr=0x%x, "
            "req_q_cnt=0x%x, req_cnt=0x%x", ha->req_ring_index,
            ha->req_q_cnt, req_cnt);
        goto out;
    }

    /* Check for empty slot in outstanding command list. */
    for (cnt = 0; cnt < MAX_OUTSTANDING_COMMANDS &&
             (ha->outstanding_cmds[cnt] != 0); cnt++) ;

    if (cnt >= MAX_OUTSTANDING_COMMANDS) {
        status = SCSI_MLQUEUE_HOST_BUSY;
        dprintk(2, "qla1280_32bit_start_scsi: NO ROOM IN OUTSTANDING "
            "ARRAY, req_q_cnt=0x%x\n", ha->req_q_cnt);
        goto out;
    }

    CMD_HANDLE(sp->cmd) = (unsigned char *) (unsigned long)(cnt + 1);
    ha->outstanding_cmds[cnt] = sp;
    ha->req_q_cnt -= req_cnt;

    /*
     * Build command packet.
     */
    pkt = (struct cmd_entry *) ha->request_ring_ptr;

    pkt->entry_type = COMMAND_TYPE;
    pkt->entry_count = (uint8_t) req_cnt;
    pkt->sys_define = (uint8_t) ha->req_ring_index;
    pkt->entry_status = 0;
    pkt->handle = cpu_to_le32(cnt);

    /* Zero out remaining portion of packet. */
    memset(((char *)pkt + 8), 0, (REQUEST_ENTRY_SIZE - 8));

    /* Set ISP command timeout. */
    pkt->timeout = cpu_to_le16(cmd->request->timeout/HZ);

    /* Set device target ID and LUN */
    pkt->lun = SCSI_LUN_32(cmd);
    pkt->target = SCSI_BUS_32(cmd) ?
        (SCSI_TCN_32(cmd) | BIT_7) : SCSI_TCN_32(cmd);

    /* Enable simple tag queuing if device supports it. */
    if (cmd->device->simple_tags)
        pkt->control_flags |= cpu_to_le16(BIT_3);

    /* Load SCSI command packet. */
    pkt->cdb_len = cpu_to_le16(CMD_CDBLEN(cmd));
    memcpy(pkt->scsi_cdb, CMD_CDBP(cmd), CMD_CDBLEN(cmd));

    /*dprintk(1, "Build packet for command[0]=0x%x\n",pkt->scsi_cdb[0]); */
    /* Set transfer direction. */
    dir = qla1280_data_direction(cmd);
    pkt->control_flags |= cpu_to_le16(dir);

    /* Set total data segment count. */
    pkt->dseg_count = cpu_to_le16(seg_cnt);

    /*
     * Load data segments.
     */
    if (seg_cnt) {
        struct scatterlist *sg, *s;
        int remseg = seg_cnt;

        sg = scsi_sglist(cmd);

        /* Setup packet address segment pointer. */
        dword_ptr = &pkt->dseg_0_address;

        dprintk(3, "Building S/G data segments..\n");
        qla1280_dump_buffer(1, (char *)sg, 4 * 16);

        /* Load command entry data segments. */
        for_each_sg(sg, s, seg_cnt, cnt) {
            if (cnt == 4)
                break;
            *dword_ptr++ =
                cpu_to_le32(pci_dma_lo32(sg_dma_address(s)));
            *dword_ptr++ = cpu_to_le32(sg_dma_len(s));
            dprintk(3, "S/G Segment phys_addr=0x%lx, len=0x%x\n",
                (pci_dma_lo32(sg_dma_address(s))),
                (sg_dma_len(s)));
            remseg--;
        }
        /*
         * Build continuation packets.
         */
        dprintk(3, "S/G Building Continuation"
            "...seg_cnt=0x%x remains\n", seg_cnt);
        while (remseg > 0) {
            /* Continue from end point */
            sg = s;
            /* Adjust ring index. */
            ha->req_ring_index++;
            if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
                ha->req_ring_index = 0;
                ha->request_ring_ptr =
                    ha->request_ring;
            } else
                ha->request_ring_ptr++;

            pkt = (struct cmd_entry *)ha->request_ring_ptr;

            /* Zero out packet. */
            memset(pkt, 0, REQUEST_ENTRY_SIZE);

            /* Load packet defaults. */
            ((struct cont_entry *) pkt)->
                entry_type = CONTINUE_TYPE;
            ((struct cont_entry *) pkt)->entry_count = 1;

            ((struct cont_entry *) pkt)->sys_define =
                (uint8_t) ha->req_ring_index;

            /* Setup packet address segment pointer. */
            dword_ptr =
                &((struct cont_entry *) pkt)->dseg_0_address;

            /* Load continuation entry data segments. */
            for_each_sg(sg, s, remseg, cnt) {
                if (cnt == 7)
                    break;
                *dword_ptr++ =
                    cpu_to_le32(pci_dma_lo32(sg_dma_address(s)));
                *dword_ptr++ =
                    cpu_to_le32(sg_dma_len(s));
                dprintk(1,
                    "S/G Segment Cont. phys_addr=0x%x, "
                    "len=0x%x\n",
                    cpu_to_le32(pci_dma_lo32(sg_dma_address(s))),
                    cpu_to_le32(sg_dma_len(s)));
            }
            remseg -= cnt;
            dprintk(5, "qla1280_32bit_start_scsi: "
                "continuation packet data - "
                "scsi(%i:%i:%i)\n", SCSI_BUS_32(cmd),
                SCSI_TCN_32(cmd), SCSI_LUN_32(cmd));
            qla1280_dump_buffer(5, (char *)pkt,
                        REQUEST_ENTRY_SIZE);
        }
    } else {    /* No data transfer at all */
        dprintk(5, "qla1280_32bit_start_scsi: No data, command "
            "packet data - \n");
        qla1280_dump_buffer(5, (char *)pkt, REQUEST_ENTRY_SIZE);
    }
    dprintk(5, "qla1280_32bit_start_scsi: First IOCB block:\n");
    qla1280_dump_buffer(5, (char *)ha->request_ring_ptr,
                REQUEST_ENTRY_SIZE);

    /* Adjust ring index. */
    ha->req_ring_index++;
    if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
        ha->req_ring_index = 0;
        ha->request_ring_ptr = ha->request_ring;
    } else
        ha->request_ring_ptr++;

    /* Set chip new ring index. */
    dprintk(2, "qla1280_32bit_start_scsi: Wakeup RISC "
        "for pending command\n");
    sp->flags |= SRB_SENT;
    ha->actthreads++;
    WRT_REG_WORD(&reg->mailbox4, ha->req_ring_index);
    /* Enforce mmio write ordering; see comment in qla1280_isp_cmd(). */
    mmiowb();

out:
    if (status)
        dprintk(2, "qla1280_32bit_start_scsi: **** FAILED ****\n");

    LEAVE("qla1280_32bit_start_scsi");

    return status;
}
#endif

/*
 * qla1280_req_pkt
 *      Function is responsible for locking ring and
 *      getting a zeroed out request packet.
 *
 * Input:
 *      ha  = adapter block pointer.
 *
 * Returns:
 *      0 = failed to get slot.
 */
static request_t *
qla1280_req_pkt(struct scsi_qla_host *ha)
{
    struct device_reg __iomem *reg = ha->iobase;
    request_t *pkt = NULL;
    int cnt;
    uint32_t timer;

    ENTER("qla1280_req_pkt");

    /*
     * This can be called from interrupt context, damn it!!!
     */
    /* Wait for 30 seconds for slot. */
    for (timer = 15000000; timer; timer--) {
        if (ha->req_q_cnt > 0) {
            /* Calculate number of free request entries. */
            cnt = RD_REG_WORD(&reg->mailbox4);
            if (ha->req_ring_index < cnt)
                ha->req_q_cnt = cnt - ha->req_ring_index;
            else
                ha->req_q_cnt =
                    REQUEST_ENTRY_CNT - (ha->req_ring_index - cnt);
        }

        /* Found empty request ring slot? */
        if (ha->req_q_cnt > 0) {
            ha->req_q_cnt--;
            pkt = ha->request_ring_ptr;

            /* Zero out packet. */
            memset(pkt, 0, REQUEST_ENTRY_SIZE);

            /*
             * How can this be right when we have a ring
             * size of 512???
             */
            /* Set system defined field. */
            pkt->sys_define = (uint8_t) ha->req_ring_index;

            /* Set entry count. */
            pkt->entry_count = 1;

            break;
        }

        udelay(2);  /* 10 */

        /* Check for pending interrupts. */
        qla1280_poll(ha);
    }

    if (!pkt)
        dprintk(2, "qla1280_req_pkt: **** FAILED ****\n");
    else
        dprintk(3, "qla1280_req_pkt: exiting normally\n");

    return pkt;
}

/*
 * qla1280_isp_cmd
 *      Function is responsible for modifying ISP input pointer.
 *      Releases ring lock.
 *
 * Input:
 *      ha  = adapter block pointer.
 */
static void
qla1280_isp_cmd(struct scsi_qla_host *ha)
{
    struct device_reg __iomem *reg = ha->iobase;

    ENTER("qla1280_isp_cmd");

    dprintk(5, "qla1280_isp_cmd: IOCB data:\n");
    qla1280_dump_buffer(5, (char *)ha->request_ring_ptr,
                REQUEST_ENTRY_SIZE);

    /* Adjust ring index. */
    ha->req_ring_index++;
    if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
        ha->req_ring_index = 0;
        ha->request_ring_ptr = ha->request_ring;
    } else
        ha->request_ring_ptr++;

    /*
     * Update request index to mailbox4 (Request Queue In).
     * The mmiowb() ensures that this write is ordered with writes by other
     * CPUs.  Without the mmiowb(), it is possible for the following:
     *    CPUA posts write of index 5 to mailbox4
     *    CPUA releases host lock
     *    CPUB acquires host lock
     *    CPUB posts write of index 6 to mailbox4
     *    On PCI bus, order reverses and write of 6 posts, then index 5,
     *       causing chip to issue full queue of stale commands
     * The mmiowb() prevents future writes from crossing the barrier.
     * See Documentation/DocBook/deviceiobook.tmpl for more information.
     */
    WRT_REG_WORD(&reg->mailbox4, ha->req_ring_index);
    mmiowb();

    LEAVE("qla1280_isp_cmd");
}

/****************************************************************************/
/*                        Interrupt Service Routine.                        */
/****************************************************************************/

/****************************************************************************
 *  qla1280_isr
 *      Calls I/O done on command completion.
 *
 * Input:
 *      ha           = adapter block pointer.
 *      done_q       = done queue.
 ****************************************************************************/
static void
qla1280_isr(struct scsi_qla_host *ha, struct list_head *done_q)
{
    struct device_reg __iomem *reg = ha->iobase;
    struct response *pkt;
    struct srb *sp = NULL;
    uint16_t mailbox[MAILBOX_REGISTER_COUNT];
    uint16_t *wptr;
    uint32_t index;
    u16 istatus;

    ENTER("qla1280_isr");

    istatus = RD_REG_WORD(&reg->istatus);
    if (!(istatus & (RISC_INT | PCI_INT)))
        return;

    /* Save mailbox register 5 */
    mailbox[5] = RD_REG_WORD(&reg->mailbox5);

    /* Check for mailbox interrupt. */

    mailbox[0] = RD_REG_WORD_dmasync(&reg->semaphore);

    if (mailbox[0] & BIT_0) {
        /* Get mailbox data. */
        /* dprintk(1, "qla1280_isr: In Get mailbox data \n"); */

        wptr = &mailbox[0];
        *wptr++ = RD_REG_WORD(&reg->mailbox0);
        *wptr++ = RD_REG_WORD(&reg->mailbox1);
        *wptr = RD_REG_WORD(&reg->mailbox2);
        if (mailbox[0] != MBA_SCSI_COMPLETION) {
            wptr++;
            *wptr++ = RD_REG_WORD(&reg->mailbox3);
            *wptr++ = RD_REG_WORD(&reg->mailbox4);
            wptr++;
            *wptr++ = RD_REG_WORD(&reg->mailbox6);
            *wptr = RD_REG_WORD(&reg->mailbox7);
        }

        /* Release mailbox registers. */

        WRT_REG_WORD(&reg->semaphore, 0);
        WRT_REG_WORD(&reg->host_cmd, HC_CLR_RISC_INT);

        dprintk(5, "qla1280_isr: mailbox interrupt mailbox[0] = 0x%x",
            mailbox[0]);

        /* Handle asynchronous event */
        switch (mailbox[0]) {
        case MBA_SCSI_COMPLETION:   /* Response completion */
            dprintk(5, "qla1280_isr: mailbox SCSI response "
                "completion\n");

            if (ha->flags.online) {
                /* Get outstanding command index. */
                index = mailbox[2] << 16 | mailbox[1];

                /* Validate handle. */
                if (index < MAX_OUTSTANDING_COMMANDS)
                    sp = ha->outstanding_cmds[index];
                else
                    sp = NULL;

                if (sp) {
                    /* Free outstanding command slot. */
                    ha->outstanding_cmds[index] = NULL;

                    /* Save ISP completion status */
                    CMD_RESULT(sp->cmd) = 0;
                    CMD_HANDLE(sp->cmd) = COMPLETED_HANDLE;

                    /* Place block on done queue */
                    list_add_tail(&sp->list, done_q);
                } else {
                    /*
                     * If we get here we have a real problem!
                     */
                    printk(KERN_WARNING
                           "qla1280: ISP invalid handle\n");
                }
            }
            break;

        case MBA_BUS_RESET: /* SCSI Bus Reset */
            ha->flags.reset_marker = 1;
            index = mailbox[6] & BIT_0;
            ha->bus_settings[index].reset_marker = 1;

            printk(KERN_DEBUG "qla1280_isr(): index %i "
                   "asynchronous BUS_RESET\n", index);
            break;

        case MBA_SYSTEM_ERR:    /* System Error */
            printk(KERN_WARNING
                   "qla1280: ISP System Error - mbx1=%xh, mbx2="
                   "%xh, mbx3=%xh\n", mailbox[1], mailbox[2],
                   mailbox[3]);
            break;

        case MBA_REQ_TRANSFER_ERR:  /* Request Transfer Error */
            printk(KERN_WARNING
                   "qla1280: ISP Request Transfer Error\n");
            break;

        case MBA_RSP_TRANSFER_ERR:  /* Response Transfer Error */
            printk(KERN_WARNING
                   "qla1280: ISP Response Transfer Error\n");
            break;

        case MBA_WAKEUP_THRES:  /* Request Queue Wake-up */
            dprintk(2, "qla1280_isr: asynchronous WAKEUP_THRES\n");
            break;

        case MBA_TIMEOUT_RESET: /* Execution Timeout Reset */
            dprintk(2,
                "qla1280_isr: asynchronous TIMEOUT_RESET\n");
            break;

        case MBA_DEVICE_RESET:  /* Bus Device Reset */
            printk(KERN_INFO "qla1280_isr(): asynchronous "
                   "BUS_DEVICE_RESET\n");

            ha->flags.reset_marker = 1;
            index = mailbox[6] & BIT_0;
            ha->bus_settings[index].reset_marker = 1;
            break;

        case MBA_BUS_MODE_CHANGE:
            dprintk(2,
                "qla1280_isr: asynchronous BUS_MODE_CHANGE\n");
            break;

        default:
            /* dprintk(1, "qla1280_isr: default case of switch MB \n"); */
            if (mailbox[0] < MBA_ASYNC_EVENT) {
                wptr = &mailbox[0];
                memcpy((uint16_t *) ha->mailbox_out, wptr,
                       MAILBOX_REGISTER_COUNT *
                       sizeof(uint16_t));

                if(ha->mailbox_wait != NULL)
                    complete(ha->mailbox_wait);
            }
            break;
        }
    } else {
        WRT_REG_WORD(&reg->host_cmd, HC_CLR_RISC_INT);
    }

    /*
     * We will receive interrupts during mailbox testing prior to
     * the card being marked online, hence the double check.
     */
    if (!(ha->flags.online && !ha->mailbox_wait)) {
        dprintk(2, "qla1280_isr: Response pointer Error\n");
        goto out;
    }

    if (mailbox[5] >= RESPONSE_ENTRY_CNT)
        goto out;

    while (ha->rsp_ring_index != mailbox[5]) {
        pkt = ha->response_ring_ptr;

        dprintk(5, "qla1280_isr: ha->rsp_ring_index = 0x%x, mailbox[5]"
            " = 0x%x\n", ha->rsp_ring_index, mailbox[5]);
        dprintk(5,"qla1280_isr: response packet data\n");
        qla1280_dump_buffer(5, (char *)pkt, RESPONSE_ENTRY_SIZE);

        if (pkt->entry_type == STATUS_TYPE) {
            if ((le16_to_cpu(pkt->scsi_status) & 0xff)
                || pkt->comp_status || pkt->entry_status) {
                dprintk(2, "qla1280_isr: ha->rsp_ring_index = "
                    "0x%x mailbox[5] = 0x%x, comp_status "
                    "= 0x%x, scsi_status = 0x%x\n",
                    ha->rsp_ring_index, mailbox[5],
                    le16_to_cpu(pkt->comp_status),
                    le16_to_cpu(pkt->scsi_status));
            }
        } else {
            dprintk(2, "qla1280_isr: ha->rsp_ring_index = "
                "0x%x, mailbox[5] = 0x%x\n",
                ha->rsp_ring_index, mailbox[5]);
            dprintk(2, "qla1280_isr: response packet data\n");
            qla1280_dump_buffer(2, (char *)pkt,
                        RESPONSE_ENTRY_SIZE);
        }

        if (pkt->entry_type == STATUS_TYPE || pkt->entry_status) {
            dprintk(2, "status: Cmd %p, handle %i\n",
                ha->outstanding_cmds[pkt->handle]->cmd,
                pkt->handle);
            if (pkt->entry_type == STATUS_TYPE)
                qla1280_status_entry(ha, pkt, done_q);
            else
                qla1280_error_entry(ha, pkt, done_q);
            /* Adjust ring index. */
            ha->rsp_ring_index++;
            if (ha->rsp_ring_index == RESPONSE_ENTRY_CNT) {
                ha->rsp_ring_index = 0;
                ha->response_ring_ptr = ha->response_ring;
            } else
                ha->response_ring_ptr++;
            WRT_REG_WORD(&reg->mailbox5, ha->rsp_ring_index);
        }
    }
    
 out:
    LEAVE("qla1280_isr");
}

/*
 *  qla1280_rst_aen
 *      Processes asynchronous reset.
 *
 * Input:
 *      ha  = adapter block pointer.
 */
static void
qla1280_rst_aen(struct scsi_qla_host *ha)
{
    uint8_t bus;

    ENTER("qla1280_rst_aen");

    if (ha->flags.online && !ha->flags.reset_active &&
        !ha->flags.abort_isp_active) {
        ha->flags.reset_active = 1;
        while (ha->flags.reset_marker) {
            /* Issue marker command. */
            ha->flags.reset_marker = 0;
            for (bus = 0; bus < ha->ports &&
                     !ha->flags.reset_marker; bus++) {
                if (ha->bus_settings[bus].reset_marker) {
                    ha->bus_settings[bus].reset_marker = 0;
                    qla1280_marker(ha, bus, 0, 0,
                               MK_SYNC_ALL);
                }
            }
        }
    }

    LEAVE("qla1280_rst_aen");
}


/*
 *  qla1280_status_entry
 *      Processes received ISP status entry.
 *
 * Input:
 *      ha           = adapter block pointer.
 *      pkt          = entry pointer.
 *      done_q       = done queue.
 */
static void
qla1280_status_entry(struct scsi_qla_host *ha, struct response *pkt,
             struct list_head *done_q)
{
    unsigned int bus, target, lun;
    int sense_sz;
    struct srb *sp;
    struct scsi_cmnd *cmd;
    uint32_t handle = le32_to_cpu(pkt->handle);
    uint16_t scsi_status = le16_to_cpu(pkt->scsi_status);
    uint16_t comp_status = le16_to_cpu(pkt->comp_status);

    ENTER("qla1280_status_entry");

    /* Validate handle. */
    if (handle < MAX_OUTSTANDING_COMMANDS)
        sp = ha->outstanding_cmds[handle];
    else
        sp = NULL;

    if (!sp) {
        printk(KERN_WARNING "qla1280: Status Entry invalid handle\n");
        goto out;
    }

    /* Free outstanding command slot. */
    ha->outstanding_cmds[handle] = NULL;

    cmd = sp->cmd;

    /* Generate LU queue on cntrl, target, LUN */
    bus = SCSI_BUS_32(cmd);
    target = SCSI_TCN_32(cmd);
    lun = SCSI_LUN_32(cmd);

    if (comp_status || scsi_status) {
        dprintk(3, "scsi: comp_status = 0x%x, scsi_status = "
            "0x%x, handle = 0x%x\n", comp_status,
            scsi_status, handle);
    }

    /* Target busy or queue full */
    if ((scsi_status & 0xFF) == SAM_STAT_TASK_SET_FULL ||
        (scsi_status & 0xFF) == SAM_STAT_BUSY) {
        CMD_RESULT(cmd) = scsi_status & 0xff;
    } else {

        /* Save ISP completion status */
        CMD_RESULT(cmd) = qla1280_return_status(pkt, cmd);

        if (scsi_status & SAM_STAT_CHECK_CONDITION) {
            if (comp_status != CS_ARS_FAILED) {
                uint16_t req_sense_length =
                    le16_to_cpu(pkt->req_sense_length);
                if (req_sense_length < CMD_SNSLEN(cmd))
                    sense_sz = req_sense_length;
                else
                    /*
                     * scsi_cmnd->sense_buffer is
                     * 64 bytes, why only copy 63?
                     * This looks wrong! /Jes
                     */
                    sense_sz = CMD_SNSLEN(cmd) - 1;

                memcpy(cmd->sense_buffer,
                       &pkt->req_sense_data, sense_sz);
            } else
                sense_sz = 0;
            memset(cmd->sense_buffer + sense_sz, 0,
                   SCSI_SENSE_BUFFERSIZE - sense_sz);

            dprintk(2, "qla1280_status_entry: Check "
                "condition Sense data, b %i, t %i, "
                "l %i\n", bus, target, lun);
            if (sense_sz)
                qla1280_dump_buffer(2,
                            (char *)cmd->sense_buffer,
                            sense_sz);
        }
    }

    CMD_HANDLE(sp->cmd) = COMPLETED_HANDLE;

    /* Place command on done queue. */
    list_add_tail(&sp->list, done_q);
 out:
    LEAVE("qla1280_status_entry");
}

/*
 *  qla1280_error_entry
 *      Processes error entry.
 *
 * Input:
 *      ha           = adapter block pointer.
 *      pkt          = entry pointer.
 *      done_q       = done queue.
 */
static void
qla1280_error_entry(struct scsi_qla_host *ha, struct response *pkt,
            struct list_head *done_q)
{
    struct srb *sp;
    uint32_t handle = le32_to_cpu(pkt->handle);

    ENTER("qla1280_error_entry");

    if (pkt->entry_status & BIT_3)
        dprintk(2, "qla1280_error_entry: BAD PAYLOAD flag error\n");
    else if (pkt->entry_status & BIT_2)
        dprintk(2, "qla1280_error_entry: BAD HEADER flag error\n");
    else if (pkt->entry_status & BIT_1)
        dprintk(2, "qla1280_error_entry: FULL flag error\n");
    else
        dprintk(2, "qla1280_error_entry: UNKNOWN flag error\n");

    /* Validate handle. */
    if (handle < MAX_OUTSTANDING_COMMANDS)
        sp = ha->outstanding_cmds[handle];
    else
        sp = NULL;

    if (sp) {
        /* Free outstanding command slot. */
        ha->outstanding_cmds[handle] = NULL;

        /* Bad payload or header */
        if (pkt->entry_status & (BIT_3 + BIT_2)) {
            /* Bad payload or header, set error status. */
            /* CMD_RESULT(sp->cmd) = CS_BAD_PAYLOAD; */
            CMD_RESULT(sp->cmd) = DID_ERROR << 16;
        } else if (pkt->entry_status & BIT_1) { /* FULL flag */
            CMD_RESULT(sp->cmd) = DID_BUS_BUSY << 16;
        } else {
            /* Set error status. */
            CMD_RESULT(sp->cmd) = DID_ERROR << 16;
        }

        CMD_HANDLE(sp->cmd) = COMPLETED_HANDLE;

        /* Place command on done queue. */
        list_add_tail(&sp->list, done_q);
    }
#ifdef QLA_64BIT_PTR
    else if (pkt->entry_type == COMMAND_A64_TYPE) {
        printk(KERN_WARNING "!qla1280: Error Entry invalid handle");
    }
#endif

    LEAVE("qla1280_error_entry");
}

/*
 *  qla1280_abort_isp
 *      Resets ISP and aborts all outstanding commands.
 *
 * Input:
 *      ha           = adapter block pointer.
 *
 * Returns:
 *      0 = success
 */
static int
qla1280_abort_isp(struct scsi_qla_host *ha)
{
    struct device_reg __iomem *reg = ha->iobase;
    struct srb *sp;
    int status = 0;
    int cnt;
    int bus;

    ENTER("qla1280_abort_isp");

    if (ha->flags.abort_isp_active || !ha->flags.online)
        goto out;
    
    ha->flags.abort_isp_active = 1;

    /* Disable ISP interrupts. */
    qla1280_disable_intrs(ha);
    WRT_REG_WORD(&reg->host_cmd, HC_PAUSE_RISC);
    RD_REG_WORD(&reg->id_l);

    printk(KERN_INFO "scsi(%li): dequeuing outstanding commands\n",
           ha->host_no);
    /* Dequeue all commands in outstanding command list. */
    for (cnt = 0; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
        struct scsi_cmnd *cmd;
        sp = ha->outstanding_cmds[cnt];
        if (sp) {
            cmd = sp->cmd;
            CMD_RESULT(cmd) = DID_RESET << 16;
            CMD_HANDLE(cmd) = COMPLETED_HANDLE;
            ha->outstanding_cmds[cnt] = NULL;
            list_add_tail(&sp->list, &ha->done_q);
        }
    }

    qla1280_done(ha);

    status = qla1280_load_firmware(ha);
    if (status)
        goto out;

    /* Setup adapter based on NVRAM parameters. */
    qla1280_nvram_config (ha);

    status = qla1280_init_rings(ha);
    if (status)
        goto out;
        
    /* Issue SCSI reset. */
    for (bus = 0; bus < ha->ports; bus++)
        qla1280_bus_reset(ha, bus);
        
    ha->flags.abort_isp_active = 0;
 out:
    if (status) {
        printk(KERN_WARNING
               "qla1280: ISP error recovery failed, board disabled");
        qla1280_reset_adapter(ha);
        dprintk(2, "qla1280_abort_isp: **** FAILED ****\n");
    }

    LEAVE("qla1280_abort_isp");
    return status;
}


/*
 * qla1280_debounce_register
 *      Debounce register.
 *
 * Input:
 *      port = register address.
 *
 * Returns:
 *      register value.
 */
static u16
qla1280_debounce_register(volatile u16 __iomem * addr)
{
    volatile u16 ret;
    volatile u16 ret2;

    ret = RD_REG_WORD(addr);
    ret2 = RD_REG_WORD(addr);

    if (ret == ret2)
        return ret;

    do {
        cpu_relax();
        ret = RD_REG_WORD(addr);
        ret2 = RD_REG_WORD(addr);
    } while (ret != ret2);

    return ret;
}


/************************************************************************
 * qla1280_check_for_dead_scsi_bus                                      *
 *                                                                      *
 *    This routine checks for a dead SCSI bus                           *
 ************************************************************************/
#define SET_SXP_BANK            0x0100
#define SCSI_PHASE_INVALID      0x87FF
static int
qla1280_check_for_dead_scsi_bus(struct scsi_qla_host *ha, unsigned int bus)
{
    uint16_t config_reg, scsi_control;
    struct device_reg __iomem *reg = ha->iobase;

    if (ha->bus_settings[bus].scsi_bus_dead) {
        WRT_REG_WORD(&reg->host_cmd, HC_PAUSE_RISC);
        config_reg = RD_REG_WORD(&reg->cfg_1);
        WRT_REG_WORD(&reg->cfg_1, SET_SXP_BANK);
        scsi_control = RD_REG_WORD(&reg->scsiControlPins);
        WRT_REG_WORD(&reg->cfg_1, config_reg);
        WRT_REG_WORD(&reg->host_cmd, HC_RELEASE_RISC);

        if (scsi_control == SCSI_PHASE_INVALID) {
            ha->bus_settings[bus].scsi_bus_dead = 1;
            return 1;   /* bus is dead */
        } else {
            ha->bus_settings[bus].scsi_bus_dead = 0;
            ha->bus_settings[bus].failed_reset_count = 0;
        }
    }
    return 0;       /* bus is not dead */
}

static void
qla1280_get_target_parameters(struct scsi_qla_host *ha,
                  struct scsi_device *device)
{
    uint16_t mb[MAILBOX_REGISTER_COUNT];
    int bus, target, lun;

    bus = device->channel;
    target = device->id;
    lun = device->lun;


    mb[0] = MBC_GET_TARGET_PARAMETERS;
    mb[1] = (uint16_t) (bus ? target | BIT_7 : target);
    mb[1] <<= 8;
    qla1280_mailbox_command(ha, BIT_6 | BIT_3 | BIT_2 | BIT_1 | BIT_0,
                &mb[0]);

    printk(KERN_INFO "scsi(%li:%d:%d:%d):", ha->host_no, bus, target, lun);

    if (mb[3] != 0) {
        printk(" Sync: period %d, offset %d",
               (mb[3] & 0xff), (mb[3] >> 8));
        if (mb[2] & BIT_13)
            printk(", Wide");
        if ((mb[2] & BIT_5) && ((mb[6] >> 8) & 0xff) >= 2)
            printk(", DT");
    } else
        printk(" Async");

    if (device->simple_tags)
        printk(", Tagged queuing: depth %d", device->queue_depth);
    printk("\n");
}


#if DEBUG_QLA1280
static void
__qla1280_dump_buffer(char *b, int size)
{
    int cnt;
    u8 c;

    printk(KERN_DEBUG " 0   1   2   3   4   5   6   7   8   9   Ah  "
           "Bh  Ch  Dh  Eh  Fh\n");
    printk(KERN_DEBUG "---------------------------------------------"
           "------------------\n");

    for (cnt = 0; cnt < size;) {
        c = *b++;

        printk("0x%02x", c);
        cnt++;
        if (!(cnt % 16))
            printk("\n");
        else
            printk(" ");
    }
    if (cnt % 16)
        printk("\n");
}

/**************************************************************************
 *   ql1280_print_scsi_cmd
 *
 **************************************************************************/
static void
__qla1280_print_scsi_cmd(struct scsi_cmnd *cmd)
{
    struct scsi_qla_host *ha;
    struct Scsi_Host *host = CMD_HOST(cmd);
    struct srb *sp;
    /* struct scatterlist *sg; */

    int i;
    ha = (struct scsi_qla_host *)host->hostdata;

    sp = (struct srb *)CMD_SP(cmd);
    printk("SCSI Command @= 0x%p, Handle=0x%p\n", cmd, CMD_HANDLE(cmd));
    printk("  chan=%d, target = 0x%02x, lun = 0x%02x, cmd_len = 0x%02x\n",
           SCSI_BUS_32(cmd), SCSI_TCN_32(cmd), SCSI_LUN_32(cmd),
           CMD_CDBLEN(cmd));
    printk(" CDB = ");
    for (i = 0; i < cmd->cmd_len; i++) {
        printk("0x%02x ", cmd->cmnd[i]);
    }
    printk("  seg_cnt =%d\n", scsi_sg_count(cmd));
    printk("  request buffer=0x%p, request buffer len=0x%x\n",
           scsi_sglist(cmd), scsi_bufflen(cmd));
    /* if (cmd->use_sg)
       {
       sg = (struct scatterlist *) cmd->request_buffer;
       printk("  SG buffer: \n");
       qla1280_dump_buffer(1, (char *)sg, (cmd->use_sg*sizeof(struct scatterlist)));
       } */
    printk("  tag=%d, transfersize=0x%x \n",
           cmd->tag, cmd->transfersize);
    printk("  SP=0x%p\n", CMD_SP(cmd));
    printk(" underflow size = 0x%x, direction=0x%x\n",
           cmd->underflow, cmd->sc_data_direction);
}

/**************************************************************************
 *   ql1280_dump_device
 *
 **************************************************************************/
static void
ql1280_dump_device(struct scsi_qla_host *ha)
{

    struct scsi_cmnd *cp;
    struct srb *sp;
    int i;

    printk(KERN_DEBUG "Outstanding Commands on controller:\n");

    for (i = 0; i < MAX_OUTSTANDING_COMMANDS; i++) {
        if ((sp = ha->outstanding_cmds[i]) == NULL)
            continue;
        if ((cp = sp->cmd) == NULL)
            continue;
        qla1280_print_scsi_cmd(1, cp);
    }
}
#endif


enum tokens {
    TOKEN_NVRAM,
    TOKEN_SYNC,
    TOKEN_WIDE,
    TOKEN_PPR,
    TOKEN_VERBOSE,
    TOKEN_DEBUG,
};

struct setup_tokens {
    char *token;
    int val;
};

static struct setup_tokens setup_token[] __initdata = 
{
    { "nvram", TOKEN_NVRAM },
    { "sync", TOKEN_SYNC },
    { "wide", TOKEN_WIDE },
    { "ppr", TOKEN_PPR },
    { "verbose", TOKEN_VERBOSE },
    { "debug", TOKEN_DEBUG },
};


/**************************************************************************
 *   qla1280_setup
 *
 *   Handle boot parameters. This really needs to be changed so one
 *   can specify per adapter parameters.
 **************************************************************************/
static int __init
qla1280_setup(char *s)
{
    char *cp, *ptr;
    unsigned long val;
    int toke;

    cp = s;

    while (cp && (ptr = strchr(cp, ':'))) {
        ptr++;
        if (!strcmp(ptr, "yes")) {
            val = 0x10000;
            ptr += 3;
        } else if (!strcmp(ptr, "no")) {
            val = 0;
            ptr += 2;
        } else
            val = simple_strtoul(ptr, &ptr, 0);

        switch ((toke = qla1280_get_token(cp))) {
        case TOKEN_NVRAM:
            if (!val)
                driver_setup.no_nvram = 1;
            break;
        case TOKEN_SYNC:
            if (!val)
                driver_setup.no_sync = 1;
            else if (val != 0x10000)
                driver_setup.sync_mask = val;
            break;
        case TOKEN_WIDE:
            if (!val)
                driver_setup.no_wide = 1;
            else if (val != 0x10000)
                driver_setup.wide_mask = val;
            break;
        case TOKEN_PPR:
            if (!val)
                driver_setup.no_ppr = 1;
            else if (val != 0x10000)
                driver_setup.ppr_mask = val;
            break;
        case TOKEN_VERBOSE:
            qla1280_verbose = val;
            break;
        default:
            printk(KERN_INFO "qla1280: unknown boot option %s\n",
                   cp);
        }

        cp = strchr(ptr, ';');
        if (cp)
            cp++;
        else {
            break;
        }
    }
    return 1;
}


static int __init
qla1280_get_token(char *str)
{
    char *sep;
    long ret = -1;
    int i;

    sep = strchr(str, ':');

    if (sep) {
        for (i = 0; i < ARRAY_SIZE(setup_token); i++) {
            if (!strncmp(setup_token[i].token, str, (sep - str))) {
                ret =  setup_token[i].val;
                break;
            }
        }
    }

    return ret;
}


static struct scsi_host_template qla1280_driver_template = {
    .module         = THIS_MODULE,
    .proc_name      = "qla1280",
    .name           = "Qlogic ISP 1280/12160",
    .info           = qla1280_info,
    .slave_configure    = qla1280_slave_configure,
    .queuecommand       = qla1280_queuecommand,
    .eh_abort_handler   = qla1280_eh_abort,
    .eh_device_reset_handler= qla1280_eh_device_reset,
    .eh_bus_reset_handler   = qla1280_eh_bus_reset,
    .eh_host_reset_handler  = qla1280_eh_adapter_reset,
    .bios_param     = qla1280_biosparam,
    .can_queue      = 0xfffff,
    .this_id        = -1,
    .sg_tablesize       = SG_ALL,
    .cmd_per_lun        = 1,
    .use_clustering     = ENABLE_CLUSTERING,
};


static int __devinit
qla1280_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
    int devnum = id->driver_data;
    struct qla_boards *bdp = &ql1280_board_tbl[devnum];
    struct Scsi_Host *host;
    struct scsi_qla_host *ha;
    int error = -ENODEV;

    /* Bypass all AMI SUBSYS VENDOR IDs */
    if (pdev->subsystem_vendor == PCI_VENDOR_ID_AMI) {
        printk(KERN_INFO
               "qla1280: Skipping AMI SubSys Vendor ID Chip\n");
        goto error;
    }

    printk(KERN_INFO "qla1280: %s found on PCI bus %i, dev %i\n",
           bdp->name, pdev->bus->number, PCI_SLOT(pdev->devfn));
    
    if (pci_enable_device(pdev)) {
        printk(KERN_WARNING
               "qla1280: Failed to enabled pci device, aborting.\n");
        goto error;
    }

    pci_set_master(pdev);

    error = -ENOMEM;
    host = scsi_host_alloc(&qla1280_driver_template, sizeof(*ha));
    if (!host) {
        printk(KERN_WARNING
               "qla1280: Failed to register host, aborting.\n");
        goto error_disable_device;
    }

    ha = (struct scsi_qla_host *)host->hostdata;
    memset(ha, 0, sizeof(struct scsi_qla_host));

    ha->pdev = pdev;
    ha->devnum = devnum;    /* specifies microcode load address */

#ifdef QLA_64BIT_PTR
    if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
        if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32))) {
            printk(KERN_WARNING "scsi(%li): Unable to set a "
                   "suitable DMA mask - aborting\n", ha->host_no);
            error = -ENODEV;
            goto error_put_host;
        }
    } else
        dprintk(2, "scsi(%li): 64 Bit PCI Addressing Enabled\n",
            ha->host_no);
#else
    if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32))) {
        printk(KERN_WARNING "scsi(%li): Unable to set a "
               "suitable DMA mask - aborting\n", ha->host_no);
        error = -ENODEV;
        goto error_put_host;
    }
#endif

    ha->request_ring = pci_alloc_consistent(ha->pdev,
            ((REQUEST_ENTRY_CNT + 1) * sizeof(request_t)),
            &ha->request_dma);
    if (!ha->request_ring) {
        printk(KERN_INFO "qla1280: Failed to get request memory\n");
        goto error_put_host;
    }

    ha->response_ring = pci_alloc_consistent(ha->pdev,
            ((RESPONSE_ENTRY_CNT + 1) * sizeof(struct response)),
            &ha->response_dma);
    if (!ha->response_ring) {
        printk(KERN_INFO "qla1280: Failed to get response memory\n");
        goto error_free_request_ring;
    }

    ha->ports = bdp->numPorts;

    ha->host = host;
    ha->host_no = host->host_no;

    host->irq = pdev->irq;
    host->max_channel = bdp->numPorts - 1;
    host->max_lun = MAX_LUNS - 1;
    host->max_id = MAX_TARGETS;
    host->max_sectors = 1024;
    host->unique_id = host->host_no;

    error = -ENODEV;

#if MEMORY_MAPPED_IO
    ha->mmpbase = pci_ioremap_bar(ha->pdev, 1);
    if (!ha->mmpbase) {
        printk(KERN_INFO "qla1280: Unable to map I/O memory\n");
        goto error_free_response_ring;
    }

    host->base = (unsigned long)ha->mmpbase;
    ha->iobase = (struct device_reg __iomem *)ha->mmpbase;
#else
    host->io_port = pci_resource_start(ha->pdev, 0);
    if (!request_region(host->io_port, 0xff, "qla1280")) {
        printk(KERN_INFO "qla1280: Failed to reserve i/o region "
                 "0x%04lx-0x%04lx - already in use\n",
               host->io_port, host->io_port + 0xff);
        goto error_free_response_ring;
    }

    ha->iobase = (struct device_reg *)host->io_port;
#endif

    INIT_LIST_HEAD(&ha->done_q);

    /* Disable ISP interrupts. */
    qla1280_disable_intrs(ha);

    if (request_irq(pdev->irq, qla1280_intr_handler, IRQF_SHARED,
                "qla1280", ha)) {
        printk("qla1280 : Failed to reserve interrupt %d already "
               "in use\n", pdev->irq);
        goto error_release_region;
    }

    /* load the F/W, read paramaters, and init the H/W */
    if (qla1280_initialize_adapter(ha)) {
        printk(KERN_INFO "qla1x160: Failed to initialize adapter\n");
        goto error_free_irq;
    }

    /* set our host ID  (need to do something about our two IDs) */
    host->this_id = ha->bus_settings[0].id;

    pci_set_drvdata(pdev, host);

    error = scsi_add_host(host, &pdev->dev);
    if (error)
        goto error_disable_adapter;
    scsi_scan_host(host);

    return 0;

 error_disable_adapter:
    qla1280_disable_intrs(ha);
 error_free_irq:
    free_irq(pdev->irq, ha);
 error_release_region:
#if MEMORY_MAPPED_IO
    iounmap(ha->mmpbase);
#else
    release_region(host->io_port, 0xff);
#endif
 error_free_response_ring:
    pci_free_consistent(ha->pdev,
            ((RESPONSE_ENTRY_CNT + 1) * sizeof(struct response)),
            ha->response_ring, ha->response_dma);
 error_free_request_ring:
    pci_free_consistent(ha->pdev,
            ((REQUEST_ENTRY_CNT + 1) * sizeof(request_t)),
            ha->request_ring, ha->request_dma);
 error_put_host:
    scsi_host_put(host);
 error_disable_device:
    pci_disable_device(pdev);
 error:
    return error;
}


static void __devexit
qla1280_remove_one(struct pci_dev *pdev)
{
    struct Scsi_Host *host = pci_get_drvdata(pdev);
    struct scsi_qla_host *ha = (struct scsi_qla_host *)host->hostdata;

    scsi_remove_host(host);

    qla1280_disable_intrs(ha);

    free_irq(pdev->irq, ha);

#if MEMORY_MAPPED_IO
    iounmap(ha->mmpbase);
#else
    release_region(host->io_port, 0xff);
#endif

    pci_free_consistent(ha->pdev,
            ((REQUEST_ENTRY_CNT + 1) * (sizeof(request_t))),
            ha->request_ring, ha->request_dma);
    pci_free_consistent(ha->pdev,
            ((RESPONSE_ENTRY_CNT + 1) * (sizeof(struct response))),
            ha->response_ring, ha->response_dma);

    pci_disable_device(pdev);

    scsi_host_put(host);
}

static struct pci_driver qla1280_pci_driver = {
    .name       = "qla1280",
    .id_table   = qla1280_pci_tbl,
    .probe      = qla1280_probe_one,
    .remove     = __devexit_p(qla1280_remove_one),
};

static int __init
qla1280_init(void)
{
    if (sizeof(struct srb) > sizeof(struct scsi_pointer)) {
        printk(KERN_WARNING
               "qla1280: struct srb too big, aborting\n");
        return -EINVAL;
    }

#ifdef MODULE
    /*
     * If we are called as a module, the qla1280 pointer may not be null
     * and it would point to our bootup string, just like on the lilo
     * command line.  IF not NULL, then process this config string with
     * qla1280_setup
     *
     * Boot time Options
     * To add options at boot time add a line to your lilo.conf file like:
     * append="qla1280=verbose,max_tags:{{255,255,255,255},{255,255,255,255}}"
     * which will result in the first four devices on the first two
     * controllers being set to a tagged queue depth of 32.
     */
    if (qla1280)
        qla1280_setup(qla1280);
#endif

    return pci_register_driver(&qla1280_pci_driver);
}

static void __exit
qla1280_exit(void)
{
    int i;

    pci_unregister_driver(&qla1280_pci_driver);
    /* release any allocated firmware images */
    for (i = 0; i < QL_NUM_FW_IMAGES; i++) {
        release_firmware(qla1280_fw_tbl[i].fw);
        qla1280_fw_tbl[i].fw = NULL;
    }
}

module_init(qla1280_init);
module_exit(qla1280_exit);

MODULE_AUTHOR("Qlogic & Jes Sorensen");
MODULE_DESCRIPTION("Qlogic ISP SCSI (qla1x80/qla1x160) driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("qlogic/1040.bin");
MODULE_FIRMWARE("qlogic/1280.bin");
MODULE_FIRMWARE("qlogic/12160.bin");
MODULE_VERSION(QLA1280_VERSION);

/*
 * Overrides for Emacs so that we almost follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * tab-width: 8
 * End:
 */