patch-1.3.5 linux/drivers/scsi/hosts.c
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- Lines: 509
- Date:
Thu Jun 29 12:37:45 1995
- Orig file:
v1.3.4/linux/drivers/scsi/hosts.c
- Orig date:
Tue Jun 27 14:11:38 1995
diff -u --recursive --new-file v1.3.4/linux/drivers/scsi/hosts.c linux/drivers/scsi/hosts.c
@@ -1,19 +1,19 @@
/*
- * hosts.c Copyright (C) 1992 Drew Eckhardt
- * Copyright (C) 1993, 1994, 1995 Eric Youngdale
+ * 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
+ * mid to lowlevel SCSI driver interface
+ * Initial versions: Drew Eckhardt
+ * Subsequent revisions: Eric Youngdale
*
- * <drew@colorado.edu>
+ * <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.
+ * 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.
*/
#include <linux/config.h>
@@ -21,6 +21,7 @@
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
+#include <linux/proc_fs.h>
#include "scsi.h"
@@ -56,6 +57,10 @@
#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
@@ -113,257 +118,274 @@
*/
/*
- * 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.
+ * 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.
+ * 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. */
+ * 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}
+ 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.
+ * 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_SCSI_U14_34F
- ULTRASTOR_14_34F,
+ ULTRASTOR_14_34F,
#endif
#ifdef CONFIG_SCSI_ULTRASTOR
- ULTRASTOR_14F,
+ ULTRASTOR_14F,
#endif
#ifdef CONFIG_SCSI_AHA152X
- AHA152X,
+ AHA152X,
#endif
/* Buslogic must come before aha1542.c */
#ifdef CONFIG_SCSI_BUSLOGIC
- BUSLOGIC,
+ BUSLOGIC,
#endif
#ifdef CONFIG_SCSI_AHA1542
- AHA1542,
+ AHA1542,
#endif
#ifdef CONFIG_SCSI_AHA1740
- AHA1740,
+ AHA1740,
#endif
#ifdef CONFIG_SCSI_AIC7XXX
- AIC7XXX,
+ AIC7XXX,
#endif
#ifdef CONFIG_SCSI_FUTURE_DOMAIN
- FDOMAIN_16X0,
+ FDOMAIN_16X0,
#endif
#ifdef CONFIG_SCSI_IN2000
- IN2000,
+ IN2000,
#endif
#ifdef CONFIG_SCSI_GENERIC_NCR5380
- GENERIC_NCR5380,
+ GENERIC_NCR5380,
#endif
#ifdef CONFIG_SCSI_QLOGIC
- QLOGIC,
+ QLOGIC,
#endif
#ifdef CONFIG_SCSI_PAS16
- MV_PAS16,
+ MV_PAS16,
#endif
#ifdef CONFIG_SCSI_SEAGATE
- SEAGATE_ST0X,
+ SEAGATE_ST0X,
#endif
#ifdef CONFIG_SCSI_T128
- TRANTOR_T128,
+ TRANTOR_T128,
#endif
#ifdef CONFIG_SCSI_NCR53C7xx
- NCR53c7xx,
+ NCR53c7xx,
#endif
#ifdef CONFIG_SCSI_EATA_DMA
- EATA_DMA,
+ EATA_DMA,
+#endif
+#ifdef CONFIG_SCSI_EATA_PIO
+ EATA_PIO,
#endif
#ifdef CONFIG_SCSI_7000FASST
- WD7000,
+ WD7000,
#endif
#ifdef CONFIG_SCSI_EATA
- EATA,
+ EATA,
#endif
#ifdef CONFIG_SCSI_DEBUG
- 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.
+ * 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;
+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);
+ 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 and avoid it */
+ * once we are 100% sure that we want to use this host adapter - it is a
+ * pain to reverse this, so we try and 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;
- retval->io_port = 0;
- retval->forbidden_addr = 0;
- retval->forbidden_size = 0;
- retval->hostt = tpnt;
- retval->next = NULL;
+ 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->io_port = 0;
+ retval->forbidden_addr = 0;
+ retval->forbidden_size = 0;
+ retval->hostt = tpnt;
+ retval->next = NULL;
#ifdef DEBUG
- printk("Register %x %x: %d\n", (int)retval, (int)retval->hostt, j);
+ printk("Register %x %x: %d\n", (int)retval, (int)retval->hostt, j);
#endif
- /* The next four 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;
-
- if(!scsi_hostlist)
- scsi_hostlist = retval;
- else
- {
- shpnt = scsi_hostlist;
- while(shpnt->next) shpnt = shpnt->next;
- shpnt->next = retval;
- }
-
- return retval;
+ /* 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;
+ 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;
+ 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++)
+ 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)))
{
- /*
- * 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;
- }
- }
-
-
- 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);
+ /* 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);
}
-
- printk ("scsi : %d host%s.\n", next_scsi_host,
- (next_scsi_host == 1) ? "" : "s");
-
- scsi_make_blocked_list();
-
- /* Now attach the high level drivers */
+ tpnt->next = scsi_hosts;
+ scsi_hosts = tpnt;
+ }
+ }
+
+ /* Add the drivers to /proc/scsi */
+#if CONFIG_PROC_FS
+ build_proc_dir_entries();
+#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);
+ scsi_register_device(&sd_template);
#endif
#ifdef CONFIG_BLK_DEV_SR
- scsi_register_device(&sr_template);
+ scsi_register_device(&sr_template);
#endif
#ifdef CONFIG_CHR_DEV_ST
- scsi_register_device(&st_template);
+ scsi_register_device(&st_template);
#endif
#ifdef CONFIG_CHR_DEV_SG
- scsi_register_device(&sg_template);
+ scsi_register_device(&sg_template);
#endif
-
+
#if 0
- max_scsi_hosts = next_scsi_host;
+ max_scsi_hosts = next_scsi_host;
#endif
- return 0;
+ return 0;
}
@@ -383,7 +405,7 @@
}
}
}
- next_host:
+ next_host:
continue;
}
}
@@ -395,12 +417,14 @@
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
- * c-indent-level: 8
+ * c-indent-level: 4
* c-brace-imaginary-offset: 0
- * c-brace-offset: -8
- * c-argdecl-indent: 8
- * c-label-offset: -8
- * c-continued-statement-offset: 8
+ * 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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