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- /*
- * 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.
- */
-
- #include <linux/config.h>
- #include "../block/blk.h"
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/mm.h>
-
- #include "scsi.h"
-
- #ifndef NULL
- #define NULL 0L
- #endif
-
- #define HOSTS_C
-
- #include "hosts.h"
-
- #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_AHA274X
- #include "aha274x.h"
- #endif
-
- #ifdef CONFIG_SCSI_BUSLOGIC
- #include "buslogic.h"
- #endif
-
- #ifdef CONFIG_SCSI_EATA_DMA
- #include "eata_dma.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
- #include "qlogic.h"
- #endif
-
- #ifdef CONFIG_SCSI_SEAGATE
- #include "seagate.h"
- #endif
-
- #ifdef CONFIG_SCSI_T128
- #include "t128.h"
- #endif
-
- #ifdef CONFIG_SCSI_NCR53C7xx
- #include "53c7,8xx.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_DEBUG
- #include "scsi_debug.h"
- #endif
-
- /*
- static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/hosts.c,v 1.3 1993/09/24 12:21:00 drew Exp drew $";
- */
-
- /*
- * 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_SCSI_U14_34F
- ULTRASTOR_14_34F,
- #endif
- #ifdef CONFIG_SCSI_ULTRASTOR
- ULTRASTOR_14F,
- #endif
- #ifdef CONFIG_SCSI_AHA152X
- AHA152X,
- #endif
- /* Buslogic must come before aha1542.c */
- #ifdef CONFIG_SCSI_BUSLOGIC
- BUSLOGIC,
- #endif
- #ifdef CONFIG_SCSI_AHA1542
- AHA1542,
- #endif
- #ifdef CONFIG_SCSI_AHA1740
- AHA1740,
- #endif
- #ifdef CONFIG_SCSI_AHA274X
- AHA274X,
- #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_QLOGIC
- QLOGIC,
- #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_NCR53C7xx
- NCR53c7xx,
- #endif
- #ifdef CONFIG_SCSI_EATA_DMA
- EATA_DMA,
- #endif
- #ifdef CONFIG_SCSI_7000FASST
- WD7000,
- #endif
- #ifdef CONFIG_SCSI_EATA
- EATA,
- #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;
-
- 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 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;
- #ifdef DEBUG
- 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;
- }
-
- 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;
- }
- }
-
-
- 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;
- }
-
-
- void scsi_mem_init(unsigned long memory_end)
- {
- struct Scsi_Host *Host;
- long High8, Low24;
- for (Host = scsi_hostlist; Host != NULL; Host = Host->next) {
- if (Host->forbidden_addr > 0 && Host->forbidden_size > 0) {
- for (High8 = 1<<24; High8 < memory_end; High8 += 1<<24) {
- for (Low24 = Host->forbidden_addr;
- Low24 < Host->forbidden_addr + Host->forbidden_size;
- Low24 += PAGE_SIZE) {
- unsigned long ForbiddenAddress = High8 + Low24;
- if (ForbiddenAddress >= memory_end) goto next_host;
- mem_map[MAP_NR(ForbiddenAddress)] = MAP_PAGE_RESERVED;
- }
- }
- }
- next_host:
- continue;
- }
- }
-
- /*
- * 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: 8
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -8
- * c-argdecl-indent: 8
- * c-label-offset: -8
- * c-continued-statement-offset: 8
- * c-continued-brace-offset: 0
- * End:
- */
-