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/*
* 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
*
* Provides the following driver entry points:
* aac_detect()
* aac_release()
* aac_queuecommand()
* aac_resetcommand()
* aac_biosparm()
*
*/
#define AAC_DRIVER_VERSION "0.9.9ac2-rel"
#define AAC_DRIVER_BUILD_DATE __DATE__
#include <linux/module.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/completion.h>
#include <asm/semaphore.h>
#include <linux/blk.h>
#include "scsi.h"
#include "hosts.h"
#include "aacraid.h"
#include "sd.h"
#define AAC_DRIVERNAME "aacraid"
MODULE_AUTHOR("Red Hat Inc and Adaptec OEM RAID Solutions");
MODULE_DESCRIPTION("Supports Dell PERC2, 2/Si, 3/Si, 3/Di, and HP NetRAID-4M devices. http://domsch.com/linux/");
MODULE_LICENSE("GPL");
struct aac_dev *aac_devices[MAXIMUM_NUM_ADAPTERS];
static unsigned aac_count = 0;
static int aac_cfg_major = -1;
static int single_command_done = 0;
/*
* 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.
*/
/* FIXME static */struct aac_driver_ident aac_drivers[] = {
{ 0x1028, 0x0001, 0x1028, 0x0001, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 2/Si */
{ 0x1028, 0x0002, 0x1028, 0x0002, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 3/Di */
{ 0x1028, 0x0003, 0x1028, 0x0003, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 3/Si */
{ 0x1028, 0x0004, 0x1028, 0x00d0, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 3/Si */
{ 0x1028, 0x0002, 0x1028, 0x00d1, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 3/Di */
{ 0x1028, 0x0002, 0x1028, 0x00d9, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 3/Di */
{ 0x1028, 0x000a, 0x1028, 0x0106, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 3/Di */
{ 0x1028, 0x000a, 0x1028, 0x011b, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 3/Di */
{ 0x1028, 0x000a, 0x1028, 0x0121, aac_rx_init, "percraid", "DELL ", "PERCRAID " }, /* PERC 3/Di */
{ 0x1011, 0x0046, 0x9005, 0x1364, aac_sa_init, "percraid", "DELL ", "PERCRAID " }, /* Dell PERC2 "Quad Channel" */
{ 0x1011, 0x0046, 0x9005, 0x0365, aac_sa_init, "aacraid", "ADAPTEC ", "Adaptec 5400S " }, /* Adaptec 5400S */
{ 0x1011, 0x0046, 0x103c, 0x10c2, aac_sa_init, "hpnraid", "HP ", "NetRAID-4M " } /* HP NetRAID-4M */
};
#define NUM_AACTYPES (sizeof(aac_drivers) / sizeof(struct aac_driver_ident))
static int num_aacdrivers = NUM_AACTYPES;
static int aac_cfg_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg);
static int aac_cfg_open(struct inode * inode, struct file * file);
static int aac_cfg_release(struct inode * inode,struct file * file);
static struct file_operations aac_cfg_fops = {
owner: THIS_MODULE,
ioctl: aac_cfg_ioctl,
open: aac_cfg_open,
release: aac_cfg_release
};
static int aac_detect(Scsi_Host_Template *);
static int aac_release(struct Scsi_Host *);
static int aac_queuecommand(Scsi_Cmnd *, void (*CompletionRoutine)(Scsi_Cmnd *));
static int aac_command(Scsi_Cmnd *);
static int aac_abortcommand(Scsi_Cmnd *scsi_cmnd_ptr);
static int aac_resetcommand(Scsi_Cmnd *, unsigned int);
static int aac_biosparm(Scsi_Disk *, kdev_t, int *);
static int aac_procinfo(char *, char **, off_t, int, int, int);
static int aac_ioctl(Scsi_Device *, int, void *);
static void aac_queuedepth(struct Scsi_Host *, Scsi_Device *);
/**
* aac_detect - Probe for aacraid cards
* @template: SCSI driver template
*
* Probe for AAC Host Adapters initialize, register, and report the
* configuration of each AAC Host Adapter found.
* Returns the number of adapters successfully initialized and
* registered.
* Initializes all data necessary for this particular SCSI driver.
* Notes:
* The detect routine must not call any of the mid level functions
* to queue commands because things are not guaranteed to be set
* up yet. The detect routine can send commands to the host adapter
* as long as the program control will not be passed to scsi.c in
* the processing of the command. Note especially that
* scsi_malloc/scsi_free must not be called.
*
*/
static int aac_detect(Scsi_Host_Template *template)
{
int index;
int container;
u16 vendor_id, device_id;
struct Scsi_Host *host_ptr;
struct pci_dev *dev = NULL;
struct aac_dev *aac;
struct fsa_scsi_hba *fsa_dev_ptr;
char *name = NULL;
printk(KERN_INFO "Red Hat/Adaptec aacraid driver, %s\n", AAC_DRIVER_BUILD_DATE);
/* setting up the proc directory structure */
template->proc_name = "aacraid";
for( index = 0; index != num_aacdrivers; index++ )
{
device_id = aac_drivers[index].device;
vendor_id = aac_drivers[index].vendor;
name = aac_drivers[index].name;
dprintk((KERN_DEBUG "Checking %s %x/%x/%x/%x.\n",
name, vendor_id, device_id,
aac_drivers[index].subsystem_vendor,
aac_drivers[index].subsystem_device));
dev = NULL;
while((dev = pci_find_device(vendor_id, device_id, dev)))
{
if (pci_enable_device(dev))
continue;
pci_set_master(dev);
pci_set_dma_mask(dev, 0xFFFFFFFFULL);
if((dev->subsystem_vendor != aac_drivers[index].subsystem_vendor) ||
(dev->subsystem_device != aac_drivers[index].subsystem_device))
continue;
dprintk((KERN_DEBUG "%s device detected.\n", name));
dprintk((KERN_DEBUG "%x/%x/%x/%x.\n", vendor_id, device_id,
aac_drivers[index].subsystem_vendor, aac_drivers[index].subsystem_device));
/* Increment the host adapter count */
aac_count++;
/*
* scsi_register() allocates memory for a Scsi_Hosts structure and
* links it into the linked list of host adapters. This linked list
* contains the data for all possible <supported> scsi hosts.
* This is similar to the Scsi_Host_Template, except that we have
* one entry for each actual physical host adapter on the system,
* stored as a linked list. If there are two AAC boards, then we
* will need to make two Scsi_Host entries, but there will be only
* one Scsi_Host_Template entry. The second argument to scsi_register()
* specifies the size of the extra memory we want to hold any device
* specific information.
*/
host_ptr = scsi_register( template, sizeof(struct aac_dev) );
/*
* These three parameters can be used to allow for wide SCSI
* and for host adapters that support multiple buses.
*/
host_ptr->max_id = 17;
host_ptr->max_lun = 8;
host_ptr->max_channel = 1;
host_ptr->irq = dev->irq; /* Adapter IRQ number */
/* host_ptr->base = ( char * )(dev->resource[0].start & ~0xff); */
host_ptr->base = dev->resource[0].start;
scsi_set_pci_device(host_ptr, dev);
dprintk((KERN_DEBUG "Device base address = 0x%lx [0x%lx].\n", host_ptr->base, dev->resource[0].start));
dprintk((KERN_DEBUG "Device irq = 0x%x.\n", dev->irq));
/*
* The unique_id field is a unique identifier that must
* be assigned so that we have some way of identifying
* each host adapter properly and uniquely. For hosts
* that do not support more than one card in the
* system, this does not need to be set. It is
* initialized to zero in scsi_register(). This is the
* value returned as aac->id.
*/
host_ptr->unique_id = aac_count - 1;
/*
* This function is called after the device list has
* been built to find the tagged queueing depth
* supported for each device.
*/
host_ptr->select_queue_depths = aac_queuedepth;
aac = (struct aac_dev *)host_ptr->hostdata;
/* attach a pointer back to Scsi_Host */
aac->scsi_host_ptr = host_ptr;
aac->pdev = dev;
aac->cardtype = index;
aac->name = aac->scsi_host_ptr->hostt->name;
aac->id = aac->scsi_host_ptr->unique_id;
/* Initialize the ordinal number of the device to -1 */
fsa_dev_ptr = &(aac->fsa_dev);
for( container = 0; container < MAXIMUM_NUM_CONTAINERS; container++ )
fsa_dev_ptr->devno[container] = -1;
dprintk((KERN_DEBUG "Initializing Hardware...\n"));
if((*aac_drivers[index].init)(aac , host_ptr->unique_id) != 0)
{
/* device initialization failed */
printk(KERN_WARNING "aacraid: device initialization failed.\n");
scsi_unregister(host_ptr);
aac_count--;
}
else
{
dprintk((KERN_DEBUG "%s:%d device initialization successful.\n", name, host_ptr->unique_id));
aac_get_containers(aac);
aac_devices[aac_count-1] = aac;
}
}
}
if( aac_count ){
if((aac_cfg_major = register_chrdev( 0, "aac", &aac_cfg_fops))<0)
printk(KERN_WARNING "aacraid: unable to register \"aac\" device.\n");
}
template->present = aac_count; /* # of cards of this type found */
return aac_count;
}
/**
* aac_release - release SCSI host resources
* @host_ptr: SCSI host to clean up
*
* Release all resources previously acquired to support a specific Host
* Adapter and unregister the AAC Host Adapter.
*
* BUGS: Does not wait for the thread it kills to die.
*/
static int aac_release(struct Scsi_Host *host_ptr)
{
struct aac_dev *dev;
dprintk((KERN_DEBUG "aac_release.\n"));
dev = (struct aac_dev *)host_ptr->hostdata;
/*
* kill any threads we started
*/
kill_proc(dev->thread_pid, SIGKILL, 0);
wait_for_completion(&dev->aif_completion);
/*
* Call the comm layer to detach from this adapter
*/
aac_detach(dev);
/* Check free orderings... */
/* remove interrupt binding */
free_irq(host_ptr->irq, dev);
iounmap((void * )dev->regs.sa);
/* unregister adapter */
scsi_unregister(host_ptr);
/*
* FIXME: This assumes no hot plugging is going on...
*/
if( aac_cfg_major >= 0 )
{
unregister_chrdev(aac_cfg_major, "aac");
aac_cfg_major = -1;
}
return 0;
}
/**
* aac_queuecommand - queue a SCSI command
* @scsi_cmnd_ptr: SCSI command to queue
* @CompletionRoutine: Function to call on command completion
*
* Queues a command for execution by the associated Host Adapter.
*/
static int aac_queuecommand(Scsi_Cmnd *scsi_cmnd_ptr, void (*CompletionRoutine)(Scsi_Cmnd *))
{
int ret;
scsi_cmnd_ptr->scsi_done = CompletionRoutine;
/*
* aac_scsi_cmd() handles command processing, setting the
* result code and calling completion routine.
*/
if((ret = aac_scsi_cmd(scsi_cmnd_ptr)) != 0)
dprintk((KERN_DEBUG "aac_scsi_cmd failed.\n"));
return ret;
}
/**
* aac_done - Callback function for a non-queued command.
* @scsi_cmnd_ptr: SCSI command block to wait for
*
* Sets single_command done to 1. This lets aac_command complete.
* This function is obsolete.
*
* Bugs: Doesn't actually work properly with multiple controllers
*/
static void aac_done(Scsi_Cmnd * scsi_cmnd_ptr)
{
single_command_done = 1;
}
/**
* aac_command - synchronous SCSI command execution
* @scsi_cmnd_ptr: SCSI command to issue
*
* Accepts a single command for execution by the associated Host Adapter.
* Waits until it completes an then returns an int where:
* Byte 0 = SCSI status code
* Byte 1 = SCSI 1 byte message
* Byte 2 = host error return
* Byte 3 = mid level error return
*/
static int aac_command(Scsi_Cmnd *scsi_cmnd_ptr )
{
scsi_cmnd_ptr->scsi_done = aac_done;
dprintk((KERN_DEBUG "aac_command.\n"));
/*
* aac_scsi_cmd() handles command processing, setting the
* result code and calling completion routine.
*/
single_command_done = 0;
aac_scsi_cmd(scsi_cmnd_ptr);
while(!single_command_done)
rmb();
return scsi_cmnd_ptr->result;
}
/**
* aac_abortcommand - Abort command if possible.
* @scsi_cmnd_ptr: SCSI command block to abort
*
* Called when the midlayer wishes to abort a command. We don't support
* this facility, and our firmware looks after life for us. We just
* report the command as busy.
*/
static int aac_abortcommand(Scsi_Cmnd *scsi_cmnd_ptr )
{
return SCSI_ABORT_BUSY;
}
/**
* aac_resetcommand - Reset command handling
* @scsi_cmnd_ptr: SCSI command block causing the reset
* @reset_flags: Reset hints from the midlayer code
*
* Issue a reset of a SCSI command. We are ourselves not truely a SCSI
* controller and our firmware will do the work for us anyway. Thus this
* is a no-op. We just return SCSI_RESET_PUNT
*/
static int aac_resetcommand(struct scsi_cmnd *scsi_cmnd_ptr, unsigned int reset_flags )
{
return SCSI_RESET_PUNT;
}
/**
* aac_driverinfo - Returns the host adapter name
* @host_ptr: Scsi host to report on
*
* Returns a static string describing the device in question
*/
const char *aac_driverinfo(struct Scsi_Host *host_ptr)
{
struct aac_dev *dev = (struct aac_dev *)host_ptr->hostdata;
return aac_drivers[dev->cardtype].name;
}
/**
* aac_biosparm - return BIOS parameters for disk
* @disk: SCSI disk object to process
* @device: kdev_t of the disk in question
* @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(Scsi_Disk *disk, kdev_t dev, int *geom)
{
struct diskparm *param = (struct diskparm *)geom;
struct buffer_head * buf;
dprintk((KERN_DEBUG "aac_biosparm.\n"));
/*
* Assuming extended translation is enabled - #REVISIT#
*/
if( disk->capacity >= 2 * 1024 * 1024 ) /* 1 GB in 512 byte sectors */
{
if( disk->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 = disk->capacity/(param->heads * param->sectors);
/*
* Read the first 1024 bytes from the disk device
*/
buf = bread(MKDEV(MAJOR(dev), MINOR(dev)&~0xf), 0, block_size(dev));
if(buf == NULL)
return 0;
/*
* 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 ).
*/
if(*(unsigned short *)(buf->b_data + 0x1fe) == cpu_to_le16(0xaa55))
{
struct partition *first = (struct partition * )(buf->b_data + 0x1be);
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 = disk->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));
}
}
brelse(buf);
return 0;
}
/**
* aac_queuedepth - compute queue depths
* @host: SCSI host in question
* @dev: 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 void aac_queuedepth(struct Scsi_Host * host, Scsi_Device * dev )
{
Scsi_Device * dptr;
dprintk((KERN_DEBUG "aac_queuedepth.\n"));
dprintk((KERN_DEBUG "Device # Q Depth Online\n"));
dprintk((KERN_DEBUG "---------------------------\n"));
for(dptr = dev; dptr != NULL; dptr = dptr->next)
{
if(dptr->host == host)
{
dptr->queue_depth = 10;
dprintk((KERN_DEBUG " %2d %d %d\n",
dptr->id, dptr->queue_depth, dptr->online));
}
}
}
/*------------------------------------------------------------------------------
aac_ioctl()
Handle SCSI ioctls
*----------------------------------------------------------------------------*/
static int aac_ioctl(Scsi_Device * scsi_dev_ptr, int cmd, void * arg)
/*----------------------------------------------------------------------------*/
{
struct aac_dev *dev;
dprintk((KERN_DEBUG "aac_ioctl.\n"));
dev = (struct aac_dev *)scsi_dev_ptr->host->hostdata;
return aac_do_ioctl(dev, cmd, arg);
}
/**
* 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 )
{
unsigned minor_number = MINOR(inode->i_rdev);
if(minor_number >= aac_count)
return -ENODEV;
return 0;
}
/**
* aac_cfg_release - close down an AAC config device
* @inode: inode of configuration file
* @file: file handle of configuration file
*
* Called when the last close of the configuration file handle
* is performed.
*/
static int aac_cfg_release(struct inode * inode, struct file * file )
{
return 0;
}
/**
* 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 )
{
struct aac_dev *dev = aac_devices[MINOR(inode->i_rdev)];
return aac_do_ioctl(dev, cmd, (void *)arg);
}
/*
* To use the low level SCSI driver support using the linux kernel loadable
* module interface we should initialize the global variable driver_interface
* (datatype Scsi_Host_Template) and then include the file scsi_module.c.
*/
static Scsi_Host_Template driver_template = {
module: THIS_MODULE,
name: "AAC",
proc_info: aac_procinfo,
detect: aac_detect,
release: aac_release,
info: aac_driverinfo,
ioctl: aac_ioctl,
command: aac_command,
queuecommand: aac_queuecommand,
abort: aac_abortcommand,
reset: aac_resetcommand,
bios_param: aac_biosparm,
can_queue: AAC_NUM_IO_FIB,
this_id: 16,
sg_tablesize: 16,
max_sectors: 128,
cmd_per_lun: 1,
eh_abort_handler: aac_abortcommand,
use_clustering: ENABLE_CLUSTERING,
};
#include "scsi_module.c"
/**
* aac_procinfo - Implement /proc/scsi/<drivername>/<n>
* @proc_buffer: memory buffer for I/O
* @start_ptr: pointer to first valid data
* @offset: offset into file
* @bytes_available: space left
* @host_no: scsi host ident
* @write: direction of I/O
*
* Used to export driver statistics and other infos to the world outside
* the kernel using the proc file system. Also provides an interface to
* feed the driver with information.
*
* For reads
* - if offset > 0 return 0
* - if offset == 0 write data to proc_buffer and set the start_ptr to
* beginning of proc_buffer, return the number of characters written.
* For writes
* - writes currently not supported, return 0
*
* Bugs: Only offset zero is handled
*/
static int aac_procinfo(char *proc_buffer, char **start_ptr,off_t offset,
int bytes_available, int host_no, int write)
{
if(write || offset > 0)
return 0;
*start_ptr = proc_buffer;
return sprintf(proc_buffer, "%s %d\n", "Raid Controller, scsi hba number", host_no);
}
EXPORT_NO_SYMBOLS;
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