/*
* hosts.c Copyright (C) 1992 Drew Eckhardt
* Copyright (C) 1993, 1994, 1995 Eric Youngdale
*
* mid to lowlevel SCSI driver interface
* Initial versions: Drew Eckhardt
* Subsequent revisions: Eric Youngdale
*
* <drew@colorado.edu>
*/
/*
* This file contains the medium level SCSI
* host interface initialization, as well as the scsi_hosts array of SCSI
* hosts currently present in the system.
*/
/*
* Don't import our own symbols, as this would severely mess up our
* symbol tables.
*/
#define _SCSI_SYMS_VER_
#define __NO_VERSION__
#include <linux/module.h>
#include <linux/config.h>
#include <linux/blk.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include "scsi.h"
#ifndef NULL
#define NULL 0L
#endif
#define HOSTS_C
#include "hosts.h"
#ifdef CONFIG_A3000_SCSI
#include "a3000.h"
#endif
#ifdef CONFIG_A2091_SCSI
#include "a2091.h"
#endif
#ifdef CONFIG_GVP11_SCSI
#include "gvp11.h"
#endif
#ifdef CONFIG_ATARI_SCSI
#include "atari_scsi.h"
#endif
#ifdef CONFIG_SCSI_ADVANSYS
#include "advansys.h"
#endif
#ifdef CONFIG_SCSI_AHA152X
#include "aha152x.h"
#endif
#ifdef CONFIG_SCSI_AHA1542
#include "aha1542.h"
#endif
#ifdef CONFIG_SCSI_AHA1740
#include "aha1740.h"
#endif
#ifdef CONFIG_SCSI_AIC7XXX
#include "aic7xxx.h"
#endif
#ifdef CONFIG_SCSI_BUSLOGIC
#include "BusLogic.h"
#endif
#ifdef CONFIG_SCSI_EATA_DMA
#include "eata_dma.h"
#endif
#ifdef CONFIG_SCSI_EATA_PIO
#include "eata_pio.h"
#endif
#ifdef CONFIG_SCSI_U14_34F
#include "u14-34f.h"
#endif
#ifdef CONFIG_SCSI_FUTURE_DOMAIN
#include "fdomain.h"
#endif
#ifdef CONFIG_SCSI_GENERIC_NCR5380
#include "g_NCR5380.h"
#endif
#ifdef CONFIG_SCSI_IN2000
#include "in2000.h"
#endif
#ifdef CONFIG_SCSI_PAS16
#include "pas16.h"
#endif
#ifdef CONFIG_SCSI_QLOGIC_FAS
#include "qlogicfas.h"
#endif
#ifdef CONFIG_SCSI_QLOGIC_ISP
#include "qlogicisp.h"
#endif
#ifdef CONFIG_SCSI_SEAGATE
#include "seagate.h"
#endif
#ifdef CONFIG_SCSI_T128
#include "t128.h"
#endif
#ifdef CONFIG_SCSI_DTC3280
#include "dtc.h"
#endif
#ifdef CONFIG_SCSI_NCR53C7xx
#include "53c7,8xx.h"
#endif
#ifdef CONFIG_SCSI_NCR53C8XX
#include "ncr53c8xx.h"
#endif
#ifdef CONFIG_SCSI_ULTRASTOR
#include "ultrastor.h"
#endif
#ifdef CONFIG_SCSI_7000FASST
#include "wd7000.h"
#endif
#ifdef CONFIG_SCSI_EATA
#include "eata.h"
#endif
#ifdef CONFIG_SCSI_NCR53C406A
#include "NCR53c406a.h"
#endif
#ifdef CONFIG_SCSI_DC390T
#include "dc390.h"
#endif
#ifdef CONFIG_SCSI_AM53C974
#include "AM53C974.h"
#endif
#ifdef CONFIG_SCSI_PPA
#include "ppa.h"
#endif
#ifdef CONFIG_SCSI_SUNESP
#include "esp.h"
#endif
#ifdef CONFIG_BLK_DEV_IDESCSI
#include "ide-scsi.h"
#endif
#ifdef CONFIG_SCSI_GDTH
#include "gdth.h"
#endif
#ifdef CONFIG_SCSI_DEBUG
#include "scsi_debug.h"
#endif
/*
static const char RCSid[] = "$Header: /usr/src/linux-1.3.95/drivers/scsi/RCS/hosts.c,v 1.7 1996/04/25 22:21:56 root Exp root $";
*/
/*
* The scsi host entries should be in the order you wish the
* cards to be detected. A driver may appear more than once IFF
* it can deal with being detected (and therefore initialized)
* with more than one simultaneous host number, can handle being
* reentrant, etc.
*
* They may appear in any order, as each SCSI host is told which host
* number it is during detection.
*/
/* This is a placeholder for controllers that are not configured into
* the system - we do this to ensure that the controller numbering is
* always consistent, no matter how the kernel is configured. */
#define NO_CONTROLLER {NULL, NULL, NULL, NULL, NULL, NULL, NULL, \
NULL, NULL, 0, 0, 0, 0, 0, 0}
/*
* When figure is run, we don't want to link to any object code. Since
* the macro for each host will contain function pointers, we cannot
* use it and instead must use a "blank" that does no such
* idiocy.
*/
Scsi_Host_Template * scsi_hosts = NULL;
static Scsi_Host_Template builtin_scsi_hosts[] =
{
#ifdef CONFIG_AMIGA
#ifdef CONFIG_A3000_SCSI
A3000_SCSI,
#endif
#ifdef CONFIG_A2091_SCSI
A2091_SCSI,
#endif
#ifdef CONFIG_GVP11_SCSI
GVP11_SCSI,
#endif
#endif
#ifdef CONFIG_ATARI
#ifdef CONFIG_ATARI_SCSI
ATARI_SCSI,
#endif
#endif
#ifdef CONFIG_SCSI_ADVANSYS
ADVANSYS,
#endif
/* BusLogic must come before aha1542.c */
#ifdef CONFIG_SCSI_BUSLOGIC
BUSLOGIC,
#endif
#ifdef CONFIG_SCSI_U14_34F
ULTRASTOR_14_34F,
#endif
#ifdef CONFIG_SCSI_ULTRASTOR
ULTRASTOR_14F,
#endif
#ifdef CONFIG_SCSI_AHA152X
AHA152X,
#endif
#ifdef CONFIG_SCSI_AHA1542
AHA1542,
#endif
#ifdef CONFIG_SCSI_AHA1740
AHA1740,
#endif
#ifdef CONFIG_SCSI_AIC7XXX
AIC7XXX,
#endif
#ifdef CONFIG_SCSI_FUTURE_DOMAIN
FDOMAIN_16X0,
#endif
#ifdef CONFIG_SCSI_IN2000
IN2000,
#endif
#ifdef CONFIG_SCSI_GENERIC_NCR5380
GENERIC_NCR5380,
#endif
#ifdef CONFIG_SCSI_NCR53C406A /* 53C406A should come before QLOGIC */
NCR53c406a,
#endif
#ifdef CONFIG_SCSI_QLOGIC_FAS
QLOGICFAS,
#endif
#ifdef CONFIG_SCSI_QLOGIC_ISP
QLOGICISP,
#endif
#ifdef CONFIG_SCSI_PAS16
MV_PAS16,
#endif
#ifdef CONFIG_SCSI_SEAGATE
SEAGATE_ST0X,
#endif
#ifdef CONFIG_SCSI_T128
TRANTOR_T128,
#endif
#ifdef CONFIG_SCSI_DTC3280
DTC3x80,
#endif
#ifdef CONFIG_SCSI_DC390T
DC390_T,
#endif
#ifdef CONFIG_SCSI_NCR53C7xx
NCR53c7xx,
#endif
#ifdef CONFIG_SCSI_NCR53C8XX
NCR53C8XX,
#endif
#ifdef CONFIG_SCSI_EATA_DMA
EATA_DMA,
#endif
#ifdef CONFIG_SCSI_EATA_PIO
EATA_PIO,
#endif
#ifdef CONFIG_SCSI_7000FASST
WD7000,
#endif
#ifdef CONFIG_SCSI_EATA
EATA,
#endif
#ifdef CONFIG_SCSI_AM53C974
AM53C974,
#endif
#ifdef CONFIG_SCSI_PPA
PPA,
#endif
#ifdef CONFIG_SCSI_SUNESP
SCSI_SPARC_ESP,
#endif
#ifdef CONFIG_SCSI_GDTH
GDTH,
#endif
#ifdef CONFIG_BLK_DEV_IDESCSI
IDESCSI,
#endif
#ifdef CONFIG_SCSI_DEBUG
SCSI_DEBUG,
#endif
};
#define MAX_SCSI_HOSTS (sizeof(builtin_scsi_hosts) / sizeof(Scsi_Host_Template))
/*
* Our semaphores and timeout counters, where size depends on
* MAX_SCSI_HOSTS here.
*/
struct Scsi_Host * scsi_hostlist = NULL;
struct Scsi_Device_Template * scsi_devicelist = NULL;
int max_scsi_hosts = 0;
int next_scsi_host = 0;
void
scsi_unregister(struct Scsi_Host * sh){
struct Scsi_Host * shpnt;
if(scsi_hostlist == sh)
scsi_hostlist = sh->next;
else {
shpnt = scsi_hostlist;
while(shpnt->next != sh) shpnt = shpnt->next;
shpnt->next = shpnt->next->next;
}
/* If we are removing the last host registered, it is safe to reuse
* its host number (this avoids "holes" at boot time) (DB)
*/
if (max_scsi_hosts == next_scsi_host && !scsi_loadable_module_flag)
max_scsi_hosts--;
next_scsi_host--;
scsi_init_free((char *) sh, sizeof(struct Scsi_Host) + sh->extra_bytes);
}
/* We call this when we come across a new host adapter. We only do this
* once we are 100% sure that we want to use this host adapter - it is a
* pain to reverse this, so we try to avoid it
*/
struct Scsi_Host * scsi_register(Scsi_Host_Template * tpnt, int j){
struct Scsi_Host * retval, *shpnt;
retval = (struct Scsi_Host *)scsi_init_malloc(sizeof(struct Scsi_Host) + j,
(tpnt->unchecked_isa_dma && j ? GFP_DMA : 0) | GFP_ATOMIC);
retval->host_busy = 0;
retval->block = NULL;
retval->wish_block = 0;
if(j > 0xffff) panic("Too many extra bytes requested\n");
retval->extra_bytes = j;
retval->loaded_as_module = scsi_loadable_module_flag;
retval->host_no = max_scsi_hosts++; /* never reuse host_no (DB) */
next_scsi_host++;
retval->host_queue = NULL;
retval->host_wait = NULL;
retval->last_reset = 0;
retval->irq = 0;
retval->dma_channel = 0xff;
/* These three are default values which can be overridden */
retval->max_channel = 0;
retval->max_id = 8;
retval->max_lun = 8;
retval->unique_id = 0;
retval->io_port = 0;
retval->hostt = tpnt;
retval->next = NULL;
#ifdef DEBUG
printk("Register %x %x: %d\n", (int)retval, (int)retval->hostt, j);
#endif
/* The next six are the default values which can be overridden
* if need be */
retval->this_id = tpnt->this_id;
retval->can_queue = tpnt->can_queue;
retval->sg_tablesize = tpnt->sg_tablesize;
retval->cmd_per_lun = tpnt->cmd_per_lun;
retval->unchecked_isa_dma = tpnt->unchecked_isa_dma;
retval->use_clustering = tpnt->use_clustering;
retval->select_queue_depths = NULL;
if(!scsi_hostlist)
scsi_hostlist = retval;
else
{
shpnt = scsi_hostlist;
while(shpnt->next) shpnt = shpnt->next;
shpnt->next = retval;
}
return retval;
}
int
scsi_register_device(struct Scsi_Device_Template * sdpnt)
{
if(sdpnt->next) panic("Device already registered");
sdpnt->next = scsi_devicelist;
scsi_devicelist = sdpnt;
return 0;
}
unsigned int scsi_init()
{
static int called = 0;
int i, pcount;
Scsi_Host_Template * tpnt;
struct Scsi_Host * shpnt;
const char * name;
if(called) return 0;
called = 1;
for (tpnt = &builtin_scsi_hosts[0], i = 0; i < MAX_SCSI_HOSTS; ++i, tpnt++)
{
/*
* Initialize our semaphores. -1 is interpreted to mean
* "inactive" - where as 0 will indicate a time out condition.
*/
pcount = next_scsi_host;
if ((tpnt->detect) &&
(tpnt->present =
tpnt->detect(tpnt)))
{
/* The only time this should come up is when people use
* some kind of patched driver of some kind or another. */
if(pcount == next_scsi_host) {
if(tpnt->present > 1)
panic("Failure to register low-level scsi driver");
/* The low-level driver failed to register a driver. We
* can do this now. */
scsi_register(tpnt,0);
}
tpnt->next = scsi_hosts;
scsi_hosts = tpnt;
/* Add the driver to /proc/scsi */
#if CONFIG_PROC_FS
build_proc_dir_entries(tpnt);
#endif
}
}
for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next)
{
if(shpnt->hostt->info)
name = shpnt->hostt->info(shpnt);
else
name = shpnt->hostt->name;
printk ("scsi%d : %s\n", /* And print a little message */
shpnt->host_no, name);
}
printk ("scsi : %d host%s.\n", next_scsi_host,
(next_scsi_host == 1) ? "" : "s");
scsi_make_blocked_list();
/* Now attach the high level drivers */
#ifdef CONFIG_BLK_DEV_SD
scsi_register_device(&sd_template);
#endif
#ifdef CONFIG_BLK_DEV_SR
scsi_register_device(&sr_template);
#endif
#ifdef CONFIG_CHR_DEV_ST
scsi_register_device(&st_template);
#endif
#ifdef CONFIG_CHR_DEV_SG
scsi_register_device(&sg_template);
#endif
#if 0
max_scsi_hosts = next_scsi_host;
#endif
return 0;
}
/*
* Overrides for Emacs so that we 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-indent-level: 4
* c-brace-imaginary-offset: 0
* c-brace-offset: -4
* c-argdecl-indent: 4
* c-label-offset: -4
* c-continued-statement-offset: 4
* c-continued-brace-offset: 0
* indent-tabs-mode: nil
* tab-width: 8
* End:
*/
