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Diffstat (limited to 'linux/dev/drivers/scsi/hosts.c')
-rw-r--r--linux/dev/drivers/scsi/hosts.c549
1 files changed, 549 insertions, 0 deletions
diff --git a/linux/dev/drivers/scsi/hosts.c b/linux/dev/drivers/scsi/hosts.c
new file mode 100644
index 0000000..d5086ef
--- /dev/null
+++ b/linux/dev/drivers/scsi/hosts.c
@@ -0,0 +1,549 @@
+/*
+ * 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_DC390W
+#include "dc390w.h"
+#endif
+
+#ifdef CONFIG_SCSI_DC390T
+#include "dc390.h"
+#endif
+
+#ifdef CONFIG_SCSI_AM53C974
+#include "AM53C974.h"
+#endif
+
+#ifdef CONFIG_SCSI_MEGARAID
+#include "megaraid.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: cvs/gnumach/linux/dev/drivers/scsi/Attic/hosts.c,v 1.1 1999/04/26 05:44:25 tb Exp $";
+*/
+
+/*
+ * 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_MEGARAID
+ MEGARAID,
+#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)
+ * It is also safe to reuse those of numbers directly below which have
+ * been released earlier (to avoid some holes in numbering).
+ */
+ if(sh->host_no == max_scsi_hosts - 1) {
+ while(--max_scsi_hosts >= next_scsi_host) {
+ shpnt = scsi_hostlist;
+ while(shpnt && shpnt->host_no != max_scsi_hosts - 1)
+ shpnt = shpnt->next;
+ if(shpnt)
+ break;
+ }
+ }
+ 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:
+ */
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