[PATCH] fix semaphore handling in __unregister_chrdev_region

[linux/fpc-iii.git] / drivers / scsi / aacraid / linit.c

/*
 *      Adaptec AAC series RAID controller driver
 *      (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
 *
 * based on the old aacraid driver that is..
 * Adaptec aacraid device driver for Linux.
 *
 * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Module Name:
 *   linit.c
 *
 * Abstract: Linux Driver entry module for Adaptec RAID Array Controller
 */

#define AAC_DRIVER_VERSION              "1.1.2-lk2"
#define AAC_DRIVER_BUILD_DATE           __DATE__
#define AAC_DRIVERNAME                  "aacraid"

#include <linux/compat.h>
#include <linux/blkdev.h>
#include <linux/completion.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/syscalls.h>
#include <linux/ioctl32.h>
#include <linux/delay.h>
#include <linux/smp_lock.h>
#include <asm/semaphore.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>
#include <scsi/scsicam.h>
#include <scsi/scsi_eh.h>

#include "aacraid.h"


MODULE_AUTHOR("Red Hat Inc and Adaptec");
MODULE_DESCRIPTION("Dell PERC2, 2/Si, 3/Si, 3/Di, "
                   "Adaptec Advanced Raid Products, "
                   "and HP NetRAID-4M SCSI driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(AAC_DRIVER_VERSION);

static LIST_HEAD(aac_devices);
static int aac_cfg_major = -1;

/*
 * Because of the way Linux names scsi devices, the order in this table has
 * become important.  Check for on-board Raid first, add-in cards second.
 *
 * Note: The last field is used to index into aac_drivers below.
 */
static struct pci_device_id aac_pci_tbl[] = {
        { 0x1028, 0x0001, 0x1028, 0x0001, 0, 0, 0 }, /* PERC 2/Si (Iguana/PERC2Si) */
        { 0x1028, 0x0002, 0x1028, 0x0002, 0, 0, 1 }, /* PERC 3/Di (Opal/PERC3Di) */
        { 0x1028, 0x0003, 0x1028, 0x0003, 0, 0, 2 }, /* PERC 3/Si (SlimFast/PERC3Si */
        { 0x1028, 0x0004, 0x1028, 0x00d0, 0, 0, 3 }, /* PERC 3/Di (Iguana FlipChip/PERC3DiF */
        { 0x1028, 0x0002, 0x1028, 0x00d1, 0, 0, 4 }, /* PERC 3/Di (Viper/PERC3DiV) */
        { 0x1028, 0x0002, 0x1028, 0x00d9, 0, 0, 5 }, /* PERC 3/Di (Lexus/PERC3DiL) */
        { 0x1028, 0x000a, 0x1028, 0x0106, 0, 0, 6 }, /* PERC 3/Di (Jaguar/PERC3DiJ) */
        { 0x1028, 0x000a, 0x1028, 0x011b, 0, 0, 7 }, /* PERC 3/Di (Dagger/PERC3DiD) */
        { 0x1028, 0x000a, 0x1028, 0x0121, 0, 0, 8 }, /* PERC 3/Di (Boxster/PERC3DiB) */
        { 0x9005, 0x0283, 0x9005, 0x0283, 0, 0, 9 }, /* catapult */
        { 0x9005, 0x0284, 0x9005, 0x0284, 0, 0, 10 }, /* tomcat */
        { 0x9005, 0x0285, 0x9005, 0x0286, 0, 0, 11 }, /* Adaptec 2120S (Crusader) */
        { 0x9005, 0x0285, 0x9005, 0x0285, 0, 0, 12 }, /* Adaptec 2200S (Vulcan) */
        { 0x9005, 0x0285, 0x9005, 0x0287, 0, 0, 13 }, /* Adaptec 2200S (Vulcan-2m) */
        { 0x9005, 0x0285, 0x17aa, 0x0286, 0, 0, 14 }, /* Legend S220 (Legend Crusader) */
        { 0x9005, 0x0285, 0x17aa, 0x0287, 0, 0, 15 }, /* Legend S230 (Legend Vulcan) */

        { 0x9005, 0x0285, 0x9005, 0x0288, 0, 0, 16 }, /* Adaptec 3230S (Harrier) */
        { 0x9005, 0x0285, 0x9005, 0x0289, 0, 0, 17 }, /* Adaptec 3240S (Tornado) */
        { 0x9005, 0x0285, 0x9005, 0x028a, 0, 0, 18 }, /* ASR-2020ZCR SCSI PCI-X ZCR (Skyhawk) */
        { 0x9005, 0x0285, 0x9005, 0x028b, 0, 0, 19 }, /* ASR-2025ZCR SCSI SO-DIMM PCI-X ZCR (Terminator) */
        { 0x9005, 0x0286, 0x9005, 0x028c, 0, 0, 20 }, /* ASR-2230S + ASR-2230SLP PCI-X (Lancer) */
        { 0x9005, 0x0286, 0x9005, 0x028d, 0, 0, 21 }, /* ASR-2130S (Lancer) */
        { 0x9005, 0x0286, 0x9005, 0x029b, 0, 0, 22 }, /* AAR-2820SA (Intruder) */
        { 0x9005, 0x0286, 0x9005, 0x029c, 0, 0, 23 }, /* AAR-2620SA (Intruder) */
        { 0x9005, 0x0286, 0x9005, 0x029d, 0, 0, 24 }, /* AAR-2420SA (Intruder) */
        { 0x9005, 0x0286, 0x9005, 0x0800, 0, 0, 25 }, /* Callisto Jupiter Platform */
        { 0x9005, 0x0285, 0x9005, 0x028e, 0, 0, 26 }, /* ASR-2020SA SATA PCI-X ZCR (Skyhawk) */
        { 0x9005, 0x0285, 0x9005, 0x028f, 0, 0, 27 }, /* ASR-2025SA SATA SO-DIMM PCI-X ZCR (Terminator) */
        { 0x9005, 0x0285, 0x9005, 0x0290, 0, 0, 28 }, /* AAR-2410SA PCI SATA 4ch (Jaguar II) */
        { 0x9005, 0x0285, 0x1028, 0x0291, 0, 0, 29 }, /* CERC SATA RAID 2 PCI SATA 6ch (DellCorsair) */
        { 0x9005, 0x0285, 0x9005, 0x0292, 0, 0, 30 }, /* AAR-2810SA PCI SATA 8ch (Corsair-8) */
        { 0x9005, 0x0285, 0x9005, 0x0293, 0, 0, 31 }, /* AAR-21610SA PCI SATA 16ch (Corsair-16) */
        { 0x9005, 0x0285, 0x9005, 0x0294, 0, 0, 32 }, /* ESD SO-DIMM PCI-X SATA ZCR (Prowler) */
        { 0x9005, 0x0285, 0x103C, 0x3227, 0, 0, 33 }, /* AAR-2610SA PCI SATA 6ch */
        { 0x9005, 0x0285, 0x9005, 0x0296, 0, 0, 34 }, /* ASR-2240S (SabreExpress) */
        { 0x9005, 0x0285, 0x9005, 0x0297, 0, 0, 35 }, /* ASR-4005SAS */
        { 0x9005, 0x0285, 0x1014, 0x02F2, 0, 0, 36 }, /* IBM 8i (AvonPark) */
        { 0x9005, 0x0285, 0x9005, 0x0298, 0, 0, 37 }, /* ASR-4000SAS (BlackBird) */
        { 0x9005, 0x0285, 0x9005, 0x0299, 0, 0, 38 }, /* ASR-4800SAS (Marauder-X) */
        { 0x9005, 0x0285, 0x9005, 0x029A, 0, 0, 39 }, /* ASR-4805SAS (Marauder-E) */

        { 0x9005, 0x0285, 0x1028, 0x0287, 0, 0, 40 }, /* Perc 320/DC*/
        { 0x1011, 0x0046, 0x9005, 0x0365, 0, 0, 41 }, /* Adaptec 5400S (Mustang)*/
        { 0x1011, 0x0046, 0x9005, 0x0364, 0, 0, 42 }, /* Adaptec 5400S (Mustang)*/
        { 0x1011, 0x0046, 0x9005, 0x1364, 0, 0, 43 }, /* Dell PERC2/QC */
        { 0x1011, 0x0046, 0x103c, 0x10c2, 0, 0, 44 }, /* HP NetRAID-4M */

        { 0x9005, 0x0285, 0x1028, PCI_ANY_ID, 0, 0, 45 }, /* Dell Catchall */
        { 0x9005, 0x0285, 0x17aa, PCI_ANY_ID, 0, 0, 46 }, /* Legend Catchall */
        { 0x9005, 0x0285, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 47 }, /* Adaptec Catch All */
        { 0x9005, 0x0286, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 48 }, /* Adaptec Rocket Catch All */
        { 0,}
};
MODULE_DEVICE_TABLE(pci, aac_pci_tbl);

/*
 * dmb - For now we add the number of channels to this structure.  
 * In the future we should add a fib that reports the number of channels
 * for the card.  At that time we can remove the channels from here
 */
static struct aac_driver_ident aac_drivers[] = {
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 2/Si (Iguana/PERC2Si) */
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 3/Di (Opal/PERC3Di) */
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 3/Si (SlimFast/PERC3Si */
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 3/Di (Iguana FlipChip/PERC3DiF */
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 3/Di (Viper/PERC3DiV) */
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 3/Di (Lexus/PERC3DiL) */
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 1, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 3/Di (Jaguar/PERC3DiJ) */
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 3/Di (Dagger/PERC3DiD) */
        { aac_rx_init, "percraid", "DELL    ", "PERCRAID        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* PERC 3/Di (Boxster/PERC3DiB) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "catapult        ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* catapult */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "tomcat          ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* tomcat */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "Adaptec 2120S   ", 1, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Adaptec 2120S (Crusader) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "Adaptec 2200S   ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Adaptec 2200S (Vulcan) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "Adaptec 2200S   ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Adaptec 2200S (Vulcan-2m) */
        { aac_rx_init, "aacraid",  "Legend  ", "Legend S220     ", 1, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Legend S220 (Legend Crusader) */
        { aac_rx_init, "aacraid",  "Legend  ", "Legend S230     ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Legend S230 (Legend Vulcan) */

        { aac_rx_init, "aacraid",  "ADAPTEC ", "Adaptec 3230S   ", 2 }, /* Adaptec 3230S (Harrier) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "Adaptec 3240S   ", 2 }, /* Adaptec 3240S (Tornado) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-2020ZCR     ", 2 }, /* ASR-2020ZCR SCSI PCI-X ZCR (Skyhawk) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-2025ZCR     ", 2 }, /* ASR-2025ZCR SCSI SO-DIMM PCI-X ZCR (Terminator) */
        { aac_rkt_init, "aacraid",  "ADAPTEC ", "ASR-2230S PCI-X ", 2 }, /* ASR-2230S + ASR-2230SLP PCI-X (Lancer) */
        { aac_rkt_init, "aacraid",  "ADAPTEC ", "ASR-2130S PCI-X ", 1 }, /* ASR-2130S (Lancer) */
        { aac_rkt_init, "aacraid",  "ADAPTEC ", "AAR-2820SA      ", 1 }, /* AAR-2820SA (Intruder) */
        { aac_rkt_init, "aacraid",  "ADAPTEC ", "AAR-2620SA      ", 1 }, /* AAR-2620SA (Intruder) */
        { aac_rkt_init, "aacraid",  "ADAPTEC ", "AAR-2420SA      ", 1 }, /* AAR-2420SA (Intruder) */
        { aac_rkt_init, "aacraid",  "ADAPTEC ", "Callisto        ", 2, AAC_QUIRK_MASTER }, /* Jupiter Platform */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-2020SA       ", 1 }, /* ASR-2020SA SATA PCI-X ZCR (Skyhawk) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-2025SA       ", 1 }, /* ASR-2025SA SATA SO-DIMM PCI-X ZCR (Terminator) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "AAR-2410SA SATA ", 1 }, /* AAR-2410SA PCI SATA 4ch (Jaguar II) */
        { aac_rx_init, "aacraid",  "DELL    ", "CERC SR2        ", 1 }, /* CERC SATA RAID 2 PCI SATA 6ch (DellCorsair) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "AAR-2810SA SATA ", 1 }, /* AAR-2810SA PCI SATA 8ch (Corsair-8) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "AAR-21610SA SATA", 1 }, /* AAR-21610SA PCI SATA 16ch (Corsair-16) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-2026ZCR     ", 1 }, /* ESD SO-DIMM PCI-X SATA ZCR (Prowler) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "AAR-2610SA      ", 1 }, /* SATA 6Ch (Bearcat) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-2240S       ", 1 }, /* ASR-2240S (SabreExpress) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-4005SAS     ", 1 }, /* ASR-4005SAS */
        { aac_rx_init, "aacraid",  "IBM     ", "ServeRAID 8i    ", 1 }, /* IBM 8i (AvonPark) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-4000SAS     ", 1 }, /* ASR-4000SAS (BlackBird & AvonPark) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-4800SAS     ", 1 }, /* ASR-4800SAS (Marauder-X) */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "ASR-4805SAS     ", 1 }, /* ASR-4805SAS (Marauder-E) */

        { aac_rx_init, "percraid", "DELL    ", "PERC 320/DC     ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Perc 320/DC*/
        { aac_sa_init, "aacraid",  "ADAPTEC ", "Adaptec 5400S   ", 4, AAC_QUIRK_34SG }, /* Adaptec 5400S (Mustang)*/
        { aac_sa_init, "aacraid",  "ADAPTEC ", "AAC-364         ", 4, AAC_QUIRK_34SG }, /* Adaptec 5400S (Mustang)*/
        { aac_sa_init, "percraid", "DELL    ", "PERCRAID        ", 4, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Dell PERC2/QC */
        { aac_sa_init, "hpnraid",  "HP      ", "NetRAID         ", 4, AAC_QUIRK_34SG }, /* HP NetRAID-4M */

        { aac_rx_init, "aacraid",  "DELL    ", "RAID            ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Dell Catchall */
        { aac_rx_init, "aacraid",  "Legend  ", "RAID            ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Legend Catchall */
        { aac_rx_init, "aacraid",  "ADAPTEC ", "RAID            ", 2, AAC_QUIRK_31BIT | AAC_QUIRK_34SG }, /* Adaptec Catch All */
        { aac_rkt_init, "aacraid", "ADAPTEC ", "RAID            ", 2 } /* Adaptec Rocket Catch All */
};

/**
 *      aac_queuecommand        -       queue a SCSI command
 *      @cmd:           SCSI command to queue
 *      @done:          Function to call on command completion
 *
 *      Queues a command for execution by the associated Host Adapter.
 *
 *      TODO: unify with aac_scsi_cmd().
 */ 

static int aac_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
        cmd->scsi_done = done;
        return (aac_scsi_cmd(cmd) ? FAILED : 0);
} 

/**
 *      aac_info                -       Returns the host adapter name
 *      @shost:         Scsi host to report on
 *
 *      Returns a static string describing the device in question
 */

const char *aac_info(struct Scsi_Host *shost)
{
        struct aac_dev *dev = (struct aac_dev *)shost->hostdata;
        return aac_drivers[dev->cardtype].name;
}

/**
 *      aac_get_driver_ident
 *      @devtype: index into lookup table
 *
 *      Returns a pointer to the entry in the driver lookup table.
 */

struct aac_driver_ident* aac_get_driver_ident(int devtype)
{
        return &aac_drivers[devtype];
}

/**
 *      aac_biosparm    -       return BIOS parameters for disk
 *      @sdev: The scsi device corresponding to the disk
 *      @bdev: the block device corresponding to the disk
 *      @capacity: the sector capacity of the disk
 *      @geom: geometry block to fill in
 *
 *      Return the Heads/Sectors/Cylinders BIOS Disk Parameters for Disk.  
 *      The default disk geometry is 64 heads, 32 sectors, and the appropriate 
 *      number of cylinders so as not to exceed drive capacity.  In order for 
 *      disks equal to or larger than 1 GB to be addressable by the BIOS
 *      without exceeding the BIOS limitation of 1024 cylinders, Extended 
 *      Translation should be enabled.   With Extended Translation enabled, 
 *      drives between 1 GB inclusive and 2 GB exclusive are given a disk 
 *      geometry of 128 heads and 32 sectors, and drives above 2 GB inclusive 
 *      are given a disk geometry of 255 heads and 63 sectors.  However, if 
 *      the BIOS detects that the Extended Translation setting does not match 
 *      the geometry in the partition table, then the translation inferred 
 *      from the partition table will be used by the BIOS, and a warning may 
 *      be displayed.
 */
 
static int aac_biosparm(struct scsi_device *sdev, struct block_device *bdev,
                        sector_t capacity, int *geom)
{
        struct diskparm *param = (struct diskparm *)geom;
        unsigned char *buf;

        dprintk((KERN_DEBUG "aac_biosparm.\n"));

        /*
         *      Assuming extended translation is enabled - #REVISIT#
         */
        if (capacity >= 2 * 1024 * 1024) { /* 1 GB in 512 byte sectors */
                if(capacity >= 4 * 1024 * 1024) { /* 2 GB in 512 byte sectors */
                        param->heads = 255;
                        param->sectors = 63;
                } else {
                        param->heads = 128;
                        param->sectors = 32;
                }
        } else {
                param->heads = 64;
                param->sectors = 32;
        }

        param->cylinders = cap_to_cyls(capacity, param->heads * param->sectors);

        /* 
         *      Read the first 1024 bytes from the disk device, if the boot
         *      sector partition table is valid, search for a partition table
         *      entry whose end_head matches one of the standard geometry 
         *      translations ( 64/32, 128/32, 255/63 ).
         */
        buf = scsi_bios_ptable(bdev);
        if(*(unsigned short *)(buf + 0x40) == cpu_to_le16(0xaa55)) {
                struct partition *first = (struct partition * )buf;
                struct partition *entry = first;
                int saved_cylinders = param->cylinders;
                int num;
                unsigned char end_head, end_sec;

                for(num = 0; num < 4; num++) {
                        end_head = entry->end_head;
                        end_sec = entry->end_sector & 0x3f;

                        if(end_head == 63) {
                                param->heads = 64;
                                param->sectors = 32;
                                break;
                        } else if(end_head == 127) {
                                param->heads = 128;
                                param->sectors = 32;
                                break;
                        } else if(end_head == 254) {
                                param->heads = 255;
                                param->sectors = 63;
                                break;
                        }
                        entry++;
                }

                if (num == 4) {
                        end_head = first->end_head;
                        end_sec = first->end_sector & 0x3f;
                }

                param->cylinders = cap_to_cyls(capacity, param->heads * param->sectors);
                if (num < 4 && end_sec == param->sectors) {
                        if (param->cylinders != saved_cylinders)
                                dprintk((KERN_DEBUG "Adopting geometry: heads=%d, sectors=%d from partition table %d.\n",
                                        param->heads, param->sectors, num));
                } else if (end_head > 0 || end_sec > 0) {
                        dprintk((KERN_DEBUG "Strange geometry: heads=%d, sectors=%d in partition table %d.\n",
                                end_head + 1, end_sec, num));
                        dprintk((KERN_DEBUG "Using geometry: heads=%d, sectors=%d.\n",
                                        param->heads, param->sectors));
                }
        }
        kfree(buf);
        return 0;
}

/**
 *      aac_slave_configure             -       compute queue depths
 *      @sdev:  SCSI device we are considering
 *
 *      Selects queue depths for each target device based on the host adapter's
 *      total capacity and the queue depth supported by the target device.
 *      A queue depth of one automatically disables tagged queueing.
 */

static int aac_slave_configure(struct scsi_device *sdev)
{
        if (sdev->tagged_supported)
                scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, 128);
        else
                scsi_adjust_queue_depth(sdev, 0, 1);
        return 0;
}

static int aac_ioctl(struct scsi_device *sdev, int cmd, void __user * arg)
{
        struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
        return aac_do_ioctl(dev, cmd, arg);
}

/*
 * XXX: does aac really need no error handling??
 */
static int aac_eh_abort(struct scsi_cmnd *cmd)
{
        return FAILED;
}

/*
 *      aac_eh_reset    - Reset command handling
 *      @scsi_cmd:      SCSI command block causing the reset
 *
 */
static int aac_eh_reset(struct scsi_cmnd* cmd)
{
        struct scsi_device * dev = cmd->device;
        struct Scsi_Host * host = dev->host;
        struct scsi_cmnd * command;
        int count;
        struct aac_dev * aac;
        unsigned long flags;

        printk(KERN_ERR "%s: Host adapter reset request. SCSI hang ?\n", 
                                        AAC_DRIVERNAME);


        aac = (struct aac_dev *)host->hostdata;
        if (aac_adapter_check_health(aac)) {
                printk(KERN_ERR "%s: Host adapter appears dead\n", 
                                AAC_DRIVERNAME);
                return -ENODEV;
        }
        /*
         * Wait for all commands to complete to this specific
         * target (block maximum 60 seconds).
         */
        for (count = 60; count; --count) {
                int active = 0;
                __shost_for_each_device(dev, host) {
                        spin_lock_irqsave(&dev->list_lock, flags);
                        list_for_each_entry(command, &dev->cmd_list, list) {
                                if (command->serial_number) {
                                        active++;
                                        break;
                                }
                        }
                        spin_unlock_irqrestore(&dev->list_lock, flags);
                        if (active)
                                break;

                }
                /*
                 * We can exit If all the commands are complete
                 */
                if (active == 0)
                        return SUCCESS;
                spin_unlock_irq(host->host_lock);
                ssleep(1);
                spin_lock_irq(host->host_lock);
        }
        printk(KERN_ERR "%s: SCSI bus appears hung\n", AAC_DRIVERNAME);
        return -ETIMEDOUT;
}

/**
 *      aac_cfg_open            -       open a configuration file
 *      @inode: inode being opened
 *      @file: file handle attached
 *
 *      Called when the configuration device is opened. Does the needed
 *      set up on the handle and then returns
 *
 *      Bugs: This needs extending to check a given adapter is present
 *      so we can support hot plugging, and to ref count adapters.
 */

static int aac_cfg_open(struct inode *inode, struct file *file)
{
        struct aac_dev *aac;
        unsigned minor = iminor(inode);
        int err = -ENODEV;

        list_for_each_entry(aac, &aac_devices, entry) {
                if (aac->id == minor) {
                        file->private_data = aac;
                        err = 0;
                        break;
                }
        }

        return err;
}

/**
 *      aac_cfg_ioctl           -       AAC configuration request
 *      @inode: inode of device
 *      @file: file handle
 *      @cmd: ioctl command code
 *      @arg: argument
 *
 *      Handles a configuration ioctl. Currently this involves wrapping it
 *      up and feeding it into the nasty windowsalike glue layer.
 *
 *      Bugs: Needs locking against parallel ioctls lower down
 *      Bugs: Needs to handle hot plugging
 */
 
static int aac_cfg_ioctl(struct inode *inode,  struct file *file,
                unsigned int cmd, unsigned long arg)
{
        return aac_do_ioctl(file->private_data, cmd, (void __user *)arg);
}

#ifdef CONFIG_COMPAT
static long aac_compat_do_ioctl(struct aac_dev *dev, unsigned cmd, unsigned long arg)
{
        long ret;
        lock_kernel();
        switch (cmd) { 
        case FSACTL_MINIPORT_REV_CHECK:
        case FSACTL_SENDFIB:
        case FSACTL_OPEN_GET_ADAPTER_FIB:
        case FSACTL_CLOSE_GET_ADAPTER_FIB:
        case FSACTL_SEND_RAW_SRB:
        case FSACTL_GET_PCI_INFO:
        case FSACTL_QUERY_DISK:
        case FSACTL_DELETE_DISK:
        case FSACTL_FORCE_DELETE_DISK:
        case FSACTL_GET_CONTAINERS: 
                ret = aac_do_ioctl(dev, cmd, (void __user *)arg);
                break;

        case FSACTL_GET_NEXT_ADAPTER_FIB: {
                struct fib_ioctl __user *f;
                
                f = compat_alloc_user_space(sizeof(*f));
                ret = 0;
                if (clear_user(f, sizeof(*f) != sizeof(*f)))
                        ret = -EFAULT;
                if (copy_in_user(f, (void __user *)arg, sizeof(struct fib_ioctl) - sizeof(u32)))
                        ret = -EFAULT;
                if (!ret)
                        ret = aac_do_ioctl(dev, cmd, (void __user *)arg);
                break;
        }

        default:
                ret = -ENOIOCTLCMD; 
                break;
        } 
        unlock_kernel();
        return ret;
}

static int aac_compat_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
{
        struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
        return aac_compat_do_ioctl(dev, cmd, (unsigned long)arg);
}

static long aac_compat_cfg_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
        return aac_compat_do_ioctl((struct aac_dev *)file->private_data, cmd, arg);
}
#endif

static struct file_operations aac_cfg_fops = {
        .owner          = THIS_MODULE,
        .ioctl          = aac_cfg_ioctl,
#ifdef CONFIG_COMPAT
        .compat_ioctl   = aac_compat_cfg_ioctl,
#endif
        .open           = aac_cfg_open,
};

static struct scsi_host_template aac_driver_template = {
        .module                         = THIS_MODULE,
        .name                           = "AAC",
        .proc_name                      = "aacraid",
        .info                           = aac_info,
        .ioctl                          = aac_ioctl,
#ifdef CONFIG_COMPAT
        .compat_ioctl                   = aac_compat_ioctl,
#endif
        .queuecommand                   = aac_queuecommand,
        .bios_param                     = aac_biosparm, 
        .slave_configure                = aac_slave_configure,
        .eh_abort_handler               = aac_eh_abort,
        .eh_host_reset_handler          = aac_eh_reset,
        .can_queue                      = AAC_NUM_IO_FIB,       
        .this_id                        = 16,
        .sg_tablesize                   = 16,
        .max_sectors                    = 128,
#if (AAC_NUM_IO_FIB > 256)
        .cmd_per_lun                    = 256,
#else           
        .cmd_per_lun                    = AAC_NUM_IO_FIB, 
#endif  
        .use_clustering                 = ENABLE_CLUSTERING,
};


static int __devinit aac_probe_one(struct pci_dev *pdev,
                const struct pci_device_id *id)
{
        unsigned index = id->driver_data;
        struct Scsi_Host *shost;
        struct aac_dev *aac;
        struct list_head *insert = &aac_devices;
        int error = -ENODEV;
        int unique_id = 0;

        list_for_each_entry(aac, &aac_devices, entry) {
                if (aac->id > unique_id)
                        break;
                insert = &aac->entry;
                unique_id++;
        }

        if (pci_enable_device(pdev))
                goto out;

        if (pci_set_dma_mask(pdev, 0xFFFFFFFFULL) || 
                        pci_set_consistent_dma_mask(pdev, 0xFFFFFFFFULL))
                goto out;
        /*
         * If the quirk31 bit is set, the adapter needs adapter
         * to driver communication memory to be allocated below 2gig
         */
        if (aac_drivers[index].quirks & AAC_QUIRK_31BIT) 
                if (pci_set_dma_mask(pdev, 0x7FFFFFFFULL) ||
                                pci_set_consistent_dma_mask(pdev, 0x7FFFFFFFULL))
                        goto out;
        
        pci_set_master(pdev);

        shost = scsi_host_alloc(&aac_driver_template, sizeof(struct aac_dev));
        if (!shost)
                goto out_disable_pdev;

        shost->irq = pdev->irq;
        shost->base = pci_resource_start(pdev, 0);
        shost->unique_id = unique_id;

        aac = (struct aac_dev *)shost->hostdata;
        aac->scsi_host_ptr = shost;     
        aac->pdev = pdev;
        aac->name = aac_driver_template.name;
        aac->id = shost->unique_id;
        aac->cardtype =  index;
        INIT_LIST_HEAD(&aac->entry);

        aac->fibs = kmalloc(sizeof(struct fib) * AAC_NUM_FIB, GFP_KERNEL);
        if (!aac->fibs)
                goto out_free_host;
        spin_lock_init(&aac->fib_lock);

        if ((*aac_drivers[index].init)(aac))
                goto out_free_fibs;

        /*
         * If we had set a smaller DMA mask earlier, set it to 4gig
         * now since the adapter can dma data to at least a 4gig
         * address space.
         */
        if (aac_drivers[index].quirks & AAC_QUIRK_31BIT)
                if (pci_set_dma_mask(pdev, 0xFFFFFFFFULL))
                        goto out_free_fibs;

        aac_get_adapter_info(aac);

        /*
         * max channel will be the physical channels plus 1 virtual channel
         * all containers are on the virtual channel 0
         * physical channels are address by their actual physical number+1
         */
        if (aac->nondasd_support == 1)
                shost->max_channel = aac_drivers[index].channels+1;
        else
                shost->max_channel = 1;

        aac_get_config_status(aac);
        aac_get_containers(aac);
        list_add(&aac->entry, insert);

        shost->max_id = aac->maximum_num_containers;
        if (shost->max_id < MAXIMUM_NUM_CONTAINERS)
                shost->max_id = MAXIMUM_NUM_CONTAINERS;
        else
                shost->this_id = shost->max_id;

        /*
         * dmb - we may need to move the setting of these parms somewhere else once
         * we get a fib that can report the actual numbers
         */
        shost->max_lun = AAC_MAX_LUN;

        pci_set_drvdata(pdev, shost);

        error = scsi_add_host(shost, &pdev->dev);
        if (error)
                goto out_deinit;
        scsi_scan_host(shost);

        return 0;

out_deinit:
        kill_proc(aac->thread_pid, SIGKILL, 0);
        wait_for_completion(&aac->aif_completion);

        aac_send_shutdown(aac);
        fib_map_free(aac);
        pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
        kfree(aac->queues);
        free_irq(pdev->irq, aac);
        iounmap(aac->regs.sa);
 out_free_fibs:
        kfree(aac->fibs);
        kfree(aac->fsa_dev);
 out_free_host:
        scsi_host_put(shost);
 out_disable_pdev:
        pci_disable_device(pdev);
 out:
        return error;
}

static void __devexit aac_remove_one(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct aac_dev *aac = (struct aac_dev *)shost->hostdata;

        scsi_remove_host(shost);

        kill_proc(aac->thread_pid, SIGKILL, 0);
        wait_for_completion(&aac->aif_completion);

        aac_send_shutdown(aac);
        fib_map_free(aac);
        pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr,
                        aac->comm_phys);
        kfree(aac->queues);

        free_irq(pdev->irq, aac);
        iounmap(aac->regs.sa);
        
        kfree(aac->fibs);
        
        list_del(&aac->entry);
        scsi_host_put(shost);
        pci_disable_device(pdev);
}

static struct pci_driver aac_pci_driver = {
        .name           = AAC_DRIVERNAME,
        .id_table       = aac_pci_tbl,
        .probe          = aac_probe_one,
        .remove         = __devexit_p(aac_remove_one),
};

static int __init aac_init(void)
{
        int error;
        
        printk(KERN_INFO "Red Hat/Adaptec aacraid driver (%s %s)\n",
                        AAC_DRIVER_VERSION, AAC_DRIVER_BUILD_DATE);

        error = pci_module_init(&aac_pci_driver);
        if (error)
                return error;

        aac_cfg_major = register_chrdev( 0, "aac", &aac_cfg_fops);
        if (aac_cfg_major < 0) {
                printk(KERN_WARNING
                       "aacraid: unable to register \"aac\" device.\n");
        }
        return 0;
}

static void __exit aac_exit(void)
{
        unregister_chrdev(aac_cfg_major, "aac");
        pci_unregister_driver(&aac_pci_driver);
}

module_init(aac_init);
module_exit(aac_exit);