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freebsd-dev/sys/scsi/scsiconf.c
Bruce Evans 6ab46d52a5 Don't use NULL in non-pointer contexts.
1996-07-12 04:12:25 +00:00

1378 lines
33 KiB
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/*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*
* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
*
* New configuration setup: dufault@hda.com
*
* $Id: scsiconf.c,v 1.60 1996/06/14 11:02:16 asami Exp $
*/
#include "opt_scsi.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/stat.h>
#include <sys/malloc.h>
#include <sys/sysctl.h>
#include <sys/devconf.h>
#include <sys/conf.h>
#ifdef PC98
#include <sys/device.h>
#endif
#include <machine/clock.h>
#include "scbus.h"
#include "sd.h"
#include "st.h"
#include "cd.h"
#include "ch.h"
#include "od.h"
#include "worm.h"
#include "su.h"
#include "sctarg.h"
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
static struct extend_array *extend_new __P((void));
static void extend_release __P((struct extend_array *ea, int index));
static void *extend_set __P((struct extend_array *ea, int index, void *value));
/*
* XXX SCSI_DEVICE_ENTRIES() generates extern switches but it should
* generate static switches except for this. Separate macros are
* probably required for the extern and static parts.
*/
extern struct scsi_device uk_switch;
/***********************************************************************
* Extensible arrays: Use a realloc like implementation to permit
* the arrays to be extend. These are set up to be moved out
* of this file if needed elsewhere.
*/
struct extend_array
{
int nelem;
void **ps;
};
static void make_readable __P((char *to, char *from, size_t n));
static int match __P((char *pattern, char *name));
static int scsi_bus_conf __P((struct scsi_link *sc_link_proto));
static void *
extend_alloc(size_t s)
{
void *p = malloc(s, M_DEVBUF, M_NOWAIT);
if (!p)
panic("extend_alloc: malloc failed.");
return p;
}
static void
extend_free(void *p) { free(p, M_DEVBUF); }
/* EXTEND_CHUNK: Number of extend slots to allocate whenever we need a new
* one.
*/
#ifndef EXTEND_CHUNK
#define EXTEND_CHUNK 8
#endif
static struct extend_array *
extend_new(void)
{
struct extend_array *p = extend_alloc(sizeof(*p));
if (p) {
p->nelem = 0;
p->ps = 0;
}
return p;
}
static void *
extend_set(struct extend_array *ea, int index, void *value)
{
if (index >= ea->nelem) {
void **space;
space = extend_alloc(sizeof(void *) * (index + EXTEND_CHUNK));
bzero(space, sizeof(void *) * (index + EXTEND_CHUNK));
/* Make sure we have something to copy before we copy it */
if (ea->nelem) {
bcopy(ea->ps, space, sizeof(void *) * ea->nelem);
extend_free(ea->ps);
}
ea->ps = space;
ea->nelem = index + EXTEND_CHUNK;
}
if (ea->ps[index]) {
printf("extend_set: entry %d already has storage.\n", index);
return 0;
}
else
ea->ps[index] = value;
return value;
}
void *
extend_get(struct extend_array *ea, int index)
{
if (ea == NULL || index >= ea->nelem || index < 0)
return NULL;
return ea->ps[index];
}
static void
extend_release(struct extend_array *ea, int index)
{
void *p = extend_get(ea, index);
if (p) {
ea->ps[index] = 0;
}
}
/***********************************************************************
* This extend_array holds an array of "scsibus_data" pointers.
* One of these is allocated and filled in for each scsi bus.
* it holds pointers to allow the scsi bus to get to the driver
* that is running each LUN on the bus
* it also has a template entry which is the prototype struct
* supplied by the adapter driver, this is used to initialise
* the others, before they have the rest of the fields filled in
*/
static struct extend_array *scbusses;
/*
* The structure of known drivers for autoconfiguration
*/
struct scsidevs {
u_int32_t type;
u_int32_t driver; /* normally the same as type */
boolean removable;
char *manufacturer;
char *model;
char *version;
char *devname;
char flags; /* 1 show my comparisons during boot(debug) */
u_int16_t quirks;
void *devmodes;
};
#define SC_SHOWME 0x01
#define SC_ONE_LU 0x00
#define SC_MORE_LUS 0x02
static struct scsidevs unknowndev =
{
T_UNKNOWN, T_UNKNOWN, 0, "*", "*", "*",
"uk", SC_MORE_LUS
};
static st_modes mode_tandberg3600 =
{
{0, 0, 0}, /* minor 0,1,2,3 */
{0, ST_Q_FORCE_VAR_MODE, QIC_525}, /* minor 4,5,6,7 */
{0, 0, QIC_150}, /* minor 8,9,10,11 */
{0, 0, QIC_120} /* minor 12,13,14,15 */
};
static st_modes mode_tandberg4200 =
{
{0, 0, 0}, /* minor 0,1,2,3 */
{0, ST_Q_FORCE_VAR_MODE, 0}, /* minor 4,5,6,7 */
{0, 0, QIC_150}, /* minor 8,9,10,11 */
{0, 0, QIC_120} /* minor 12,13,14,15 */
};
static st_modes mode_archive2525 =
{
{0, ST_Q_SNS_HLP, 0}, /* minor 0,1,2,3 */
{0, ST_Q_SNS_HLP, QIC_525}, /* minor 4,5,6,7 */
{0, 0, QIC_150}, /* minor 8,9,10,11 */
{0, 0, QIC_120} /* minor 12,13,14,15 */
};
static st_modes mode_archive150 =
{
{0, 0, 0}, /* minor 0,1,2,3 */
{0, 0, QIC_150}, /* minor 4,5,6,7 */
{0, 0, QIC_120}, /* minor 8,9,10,11 */
{0, 0, QIC_24} /* minor 12,13,14,15 */
};
static st_modes mode_wangtek5525 =
{
{0, 0, 0}, /* minor 0,1,2,3 */
{0, ST_Q_BLKSIZ, QIC_525}, /* minor 4,5,6,7 */
{0, 0, QIC_150}, /* minor 8,9,10,11 */
{0, 0, QIC_120} /* minor 12,13,14,15 */
};
static st_modes mode_wangdat1300 =
{
{0, 0, 0}, /* minor 0,1,2,3 */
{512, ST_Q_FORCE_FIXED_MODE, DDS}, /* minor 4,5,6,7 */
{1024, ST_Q_FORCE_FIXED_MODE, DDS}, /* minor 8,9,10,11 */
{0, ST_Q_FORCE_VAR_MODE, DDS} /* minor 12,13,14,15 */
};
static st_modes mode_unktape =
{
{0, 0, 0}, /* minor 0,1,2,3 */
{512, ST_Q_FORCE_FIXED_MODE, QIC_24}, /* minor 4,5,6,7 */
{0, ST_Q_FORCE_VAR_MODE, HALFINCH_1600}, /* minor 8,9,10,11 */
{0, ST_Q_FORCE_VAR_MODE, HALFINCH_6250} /* minor 12,13,14,15 */
};
/***********************************************************************
* A list of known devices and their "quirks". Matching is based
* first on device type, then on the manufacturer, model, and revision
* strings returned by the device. The returned strings are fixed lengths
* of 8, 16 and 4 bytes respectively. In the matching pattern, a
* question mark (?) matches any single character and a trailing
* asterisk (*) matches remaining characters. For patterns shorter
* than their respective fields, trailing spaces are implied.
*/
static struct scsidevs knowndevs[] =
{
/* od's must be probed before sd's since some of them identify as T_DIRECT */
#if NOD > 0
{
T_OPTICAL, T_OPTICAL, T_REMOV, "MATSHITA", "PD-1 LF-1000", "*",
"od", SC_MORE_LUS
},
{
T_DIRECT, T_OPTICAL, T_REMOV, "SONY", "SMO-*", "*",
"od", SC_MORE_LUS
},
{
T_OPTICAL, T_OPTICAL, T_REMOV, "*", "*", "*",
"od", SC_ONE_LU
},
#endif /* NOD */
#if NSD > 0
{
T_DIRECT, T_DIRECT, T_FIXED, "EMULEX", "MD21*" , "*",
"sd", SC_MORE_LUS
},
{
T_DIRECT, T_DIRECT, T_FIXED, "*", "*", "*",
"sd", SC_ONE_LU
},
#endif /* NSD */
#if NST > 0
{
T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "TANDBERG", " TDC 3600", "*",
"st", SC_ONE_LU, ST_Q_NEEDS_PAGE_0, mode_tandberg3600
},
{
T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "TANDBERG", " TDC 42*", "*",
"st", SC_ONE_LU, ST_Q_SNS_HLP|ST_Q_NO_1024, mode_tandberg4200
},
{
T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "ARCHIVE", "VIPER 2525*", "-005",
"st", SC_ONE_LU, 0, mode_archive2525
},
{
T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "ARCHIVE", "VIPER 150 *", "*",
"st", SC_ONE_LU, ST_Q_NEEDS_PAGE_0, mode_archive150
},
{
T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "WANGTEK", "5525ES*", "*",
"st", SC_ONE_LU, 0, mode_wangtek5525
},
{
T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "WangDAT", "Model 1300", "*",
"st", SC_ONE_LU, 0, mode_wangdat1300
},
{
T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "*", "*", "*",
"st", SC_ONE_LU, 0, mode_unktape
},
#endif /* NST */
#if NCH > 0
{
T_CHANGER, T_CHANGER, T_REMOV, "*", "*", "*",
"ch", SC_ONE_LU
},
#endif /* NCH */
#if NCD > 0
#ifndef UKTEST /* make cdroms unrecognised to test the uk driver */
/*
* CDU-8003A aka Apple CDROM-300.
*/
{
T_READONLY, T_READONLY, T_REMOV, "SONY", "CD-ROM CDU-8003A", "1.9a",
"cd", SC_ONE_LU
},
{
T_READONLY, T_READONLY, T_REMOV, "SONY", "CD-ROM CDU-8012", "3.1a",
"cd", SC_ONE_LU
},
{
T_READONLY, T_READONLY, T_REMOV, "PIONEER", "CD-ROM DRM-6??*" ,"*",
"cd", SC_MORE_LUS, CD_Q_NO_TOUCH
},
{
T_READONLY, T_READONLY, T_REMOV, "NRC", "MBR-7*" ,"*",
"cd", SC_MORE_LUS
},
{
T_READONLY, T_READONLY, T_REMOV, "CHINON", "CD-ROM CDS-535","*",
"cd", SC_ONE_LU
},
/*
* Note: My drive with v1.0 firmware "forgets" to generate scsi parity
* when answering probes.. :-( EVIL!! You need to disable scsi parity
* checking in order to find out that it answers to all 7 LUNS. :-(
* -Peter
*/
{
T_READONLY, T_READONLY, T_REMOV, "NEC", "CD-ROM DRIVE:55","*",
"cd", SC_ONE_LU
},
/*
* Same with the OEM version of this drive (1.0 firmware).
* -Paul
*/
{
T_READONLY, T_READONLY, T_REMOV, "NEC", "CD-ROM DRIVE:210","*",
"cd", SC_ONE_LU
},
/*
* Doobe-doo-be doooo
* -Mary
*/
#endif /* !UKTEST */
#endif /* NCD */
#if NWORM > 0
{
T_READONLY, T_WORM, T_REMOV, "HP", "C4324/C4325", "*",
"worm", SC_ONE_LU
},
/*
* The Plasmon's are dual-faced: they appear as T_WORM if the
* drive is empty, or a CD-R medium is in the drive, and they
* announce theirselves as T_READONLY if a CD-ROM (or fixated
* CD-R) is there. This record catches the latter case, while
* the former one falls under the terms of the generic T_WORM
* below.
*/
{
T_READONLY, T_WORM, T_REMOV, "PLASMON", "RF41*", "*",
"worm", SC_ONE_LU
},
{
T_WORM, T_WORM, T_REMOV, "*", "*", "*",
"worm", SC_ONE_LU
},
#endif /* NWORM */
{
0
}
};
/*
* Declarations
*/
static struct scsidevs *scsi_probedev __P((struct scsi_link *sc_link,
boolean *maybe_more, int *type_p));
static struct scsidevs *scsi_selectdev __P((u_int32_t qualifier, u_int32_t type,
boolean remov, char *manu, char *model,
char *rev));
/* XXX dufault@hda.com
* This scsi_device doesn't have the scsi_data_size.
* This is used during probe.
*/
static struct scsi_device probe_switch =
{
NULL,
NULL,
NULL,
NULL,
"probe",
};
/*
* XXX
* This is BOGUS.
* We do this because it was easier than adding the requisite information
* to the scsi_link structure and modifying everything to use that.
* Someday, we will do just that, and users will be able to nail down their
* preferred SCSI ids.
*
*/
struct kern_devconf kdc_scbus0 = {
0, 0, 0, /* filled in by dev_attach */
"scbus", 0, MDDC_SCBUS,
0, 0, 0, 0, /* no external data */
0, /* no parent */
0, /* no parentdata */
DC_BUSY, /* busses are always busy */
"SCSI subsystem"
};
static int free_bus; /* First bus not wired down */
static struct scsi_device *device_list;
static int next_free_type = T_NTYPES;
/* Register new functions at the head of the list. That allows
* you to replace a standard driver with a new one.
*
* You can't register the exact device (the same in memory structure)
* more than once - the list links are part of the structure. That is
* prevented.
*
* Custom devices should always be registered as type "-1". Then
* the next available type number will be allocated for it.
*
* Be careful not to register a type as 0 unless you really mean to
* replace the disk driver.
*
* This is usually called only by the "device_init" function generated
* automatically in the SCSI_DEVICE_ENTRIES macro.
*/
void
scsi_device_register(struct scsi_device *sd)
{
/* Not only is it pointless to add the same device more than once
* but it will also screw up the list.
*/
struct scsi_device *is_there;
for (is_there = device_list; is_there; is_there = is_there->next)
if (is_there == sd)
return;
if (sd->type == -1)
sd->type = next_free_type++;
sd->next = device_list;
device_list = sd;
if (sd->links == 0)
sd->links = extend_new();
}
static struct scsi_device *
scsi_device_lookup(int type)
{
struct scsi_device *sd;
for (sd = device_list; sd; sd = sd->next)
if (sd->type == type)
return sd;
return &uk_switch;
}
static struct scsi_device *
scsi_device_lookup_by_name(char *name)
{
struct scsi_device *sd;
for (sd = device_list; sd; sd = sd->next)
if (strcmp(sd->name, name) == 0)
return sd;
return &uk_switch;
}
/* Macro that lets us know something is specified.
*/
#define IS_SPECIFIED(ARG) (ARG != SCCONF_UNSPEC && ARG != SCCONF_ANY)
/* scsi_init: Do all the one time processing. This initializes the
* type drivers and initializes the configuration.
*/
static void
scsi_init(void)
{
static int done = 0;
if(!done) {
int i;
done = 1;
scbusses = extend_new();
dev_attach(&kdc_scbus0);
/* First call all type initialization functions.
*/
ukinit(); /* We always have the unknown device. */
for (i = 0; scsi_tinit[i]; i++)
(*scsi_tinit[i])();
/* Lowest free bus for auto-configure is one
* more than the first one not
* specified in config:
*/
for (i = 0; scsi_cinit[i].driver; i++)
if (IS_SPECIFIED(scsi_cinit[i].scbus) &&
free_bus <= scsi_cinit[i].scbus)
free_bus = scsi_cinit[i].scbus + 1;
/* Lowest free unit for each type for auto-configure is one
* more than the first one not specified in the config file:
*/
for (i = 0; scsi_dinit[i].name; i++) {
struct scsi_device_config *sdc = scsi_dinit + i;
struct scsi_device *sd =
scsi_device_lookup_by_name(sdc->name);
/* This is a little tricky: We don't want "sd 4" to match as
* a wired down device, but we do want "sd 4 target 5" or
* even "sd 4 scbus 1" to match.
*/
if (IS_SPECIFIED(sdc->unit) &&
(IS_SPECIFIED(sdc->target) || IS_SPECIFIED(sdc->cunit)) &&
sd->free_unit <= sdc->unit)
sd->free_unit = sdc->unit + 1;
}
}
}
/* scsi_bus_conf: Figure out which bus this is. If it is wired in config
* use that. Otherwise use the next free one.
*/
static int
scsi_bus_conf(sc_link_proto)
struct scsi_link *sc_link_proto;
{
int i;
int bus;
/* Which bus is this? Try to find a match in the "scsi_cinit"
* table. If it isn't wired down auto-configure it at the
* next available bus.
*/
bus = SCCONF_UNSPEC;
for (i = 0; scsi_cinit[i].driver; i++) {
if (IS_SPECIFIED(scsi_cinit[i].scbus))
{
if (!strcmp(sc_link_proto->adapter->name, scsi_cinit[i].driver)
&&(sc_link_proto->adapter_unit == scsi_cinit[i].unit))
{
if (IS_SPECIFIED(scsi_cinit[i].bus)) {
if (sc_link_proto->adapter_bus==scsi_cinit[i].bus){
bus = scsi_cinit[i].scbus;
break;
}
}
else if (sc_link_proto->adapter_bus == 0) {
/* Backwards compatibility for single bus cards */
bus = scsi_cinit[i].scbus;
break;
}
else {
printf("Ambiguous scbus configuration for %s%d "
"bus %d, cannot wire down. The kernel "
"config entry for scbus%d should specify "
"a controller bus.\n"
"Scbus will be assigned dynamically.\n",
sc_link_proto->adapter->name,
sc_link_proto->adapter_unit,
sc_link_proto->adapter_bus,
sc_link_proto->adapter_bus );
break;
}
}
}
}
if (bus == SCCONF_UNSPEC)
bus = free_bus++;
else if (bootverbose)
printf("Choosing drivers for scbus configured at %d\n", bus);
return bus;
}
/* scsi_assign_unit: Look through the structure generated by config.
* See if there is a fixed assignment for this unit. If there isn't,
* assign the next free unit.
*/
static int
scsi_assign_unit(struct scsi_link *sc_link)
{
int i;
int found;
#ifdef PC98
struct cfdata cf;
cf.cf_flags = 0;
#endif
found = 0;
for (i = 0; scsi_dinit[i].name; i++) {
if ((strcmp(sc_link->device->name, scsi_dinit[i].name) == 0) &&
sc_link->target == scsi_dinit[i].target &&
(
(sc_link->lun == scsi_dinit[i].lun) ||
(sc_link->lun == 0 && scsi_dinit[i].lun == SCCONF_UNSPEC)
) &&
sc_link->scsibus == scsi_dinit[i].cunit) {
sc_link->dev_unit = scsi_dinit[i].unit;
found = 1;
#ifdef PC98
cf.cf_flags = scsi_dinit[i].flags;
#endif
if (bootverbose)
printf("%s is configured at %d\n",
sc_link->device->name, sc_link->dev_unit);
break;
}
}
if (!found)
sc_link->dev_unit = sc_link->device->free_unit++;
#ifdef PC98
if (!found) {
for (i = 0; scsi_dinit[i].name; i++) {
if ((strcmp(sc_link->device->name, scsi_dinit[i].name) == 0) &&
(scsi_dinit[i].target == SCCONF_UNSPEC))
cf.cf_flags = scsi_dinit[i].flags;
}
}
if (sc_link->adapter->open_target_lu)
(*(sc_link->adapter->open_target_lu))(sc_link, &cf);
#endif
return sc_link->dev_unit;
}
#if NSCTARG > 0
/* The SCSI target configuration is simpler. If an entry is present
* we just return the bus, target and lun for that unit.
*/
static void
scsi_sctarg_lookup(char *name, int unit, int *target, int *lun, int *bus)
{
int i;
*bus = SCCONF_UNSPEC;
*target = SCCONF_UNSPEC;
*lun = SCCONF_UNSPEC;
for (i = 0; scsi_dinit[i].name; i++) {
if ((strcmp(name, scsi_dinit[i].name) == 0) &&
unit == scsi_dinit[i].unit)
{
*bus = scsi_dinit[i].cunit;
*target = scsi_dinit[i].target;
*lun = scsi_dinit[i].lun;
}
}
}
#endif /* NSCTARG > 0 */
void
scsi_configure_start(void)
{
scsi_init();
}
#if NSCTARG > 0
static errval scsi_attach_sctarg __P((void));
#endif
void
scsi_configure_finish(void)
{
#if NSCTARG > 0
scsi_attach_sctarg();
#endif
}
/*
* scsi_attachdevs is the routine called by the adapter boards
* to get all their devices configured in.
*/
void
scsi_attachdevs(scbus)
struct scsibus_data *scbus;
{
int scsibus;
struct scsi_link *sc_link_proto = scbus->adapter_link;
if ( (scsibus = scsi_bus_conf(sc_link_proto)) == -1) {
return;
}
/*
* if the adapter didn't give us this, set a default
* (compatibility with old adapter drivers)
*/
if(!(sc_link_proto->opennings)) {
sc_link_proto->opennings = 1;
}
sc_link_proto->scsibus = scsibus;
/*
* Allocate our target-lun space.
*/
scbus->sc_link = (struct scsi_link *(*)[][8])malloc(
sizeof(struct scsi_link *[scbus->maxtarg + 1][8]),
M_TEMP, M_NOWAIT);
if(scbus == 0 || scbus->sc_link == 0
|| extend_set(scbusses, scsibus, scbus) == 0) {
panic("scsi_attachdevs: malloc");
}
bzero(scbus->sc_link, sizeof(struct scsi_link*[scbus->maxtarg + 1][8]));
#if defined(SCSI_DELAY) && SCSI_DELAY > 2
printf("%s%d waiting for scsi devices to settle\n",
sc_link_proto->adapter->name, sc_link_proto->adapter_unit);
#else /* SCSI_DELAY > 2 */
#undef SCSI_DELAY
#define SCSI_DELAY 2
#endif /* SCSI_DELAY */
DELAY(1000000 * SCSI_DELAY);
scsi_probe_bus(scsibus,-1,-1);
}
/*
* Probe the requested scsi bus. It must be already set up.
* -1 requests all set up scsi busses.
* targ and lun optionally narrow the search if not -1
*/
errval
scsi_probe_busses(int bus, int targ, int lun)
{
if (bus == -1) {
for(bus = 0; bus < scbusses->nelem; bus++) {
scsi_probe_bus(bus, targ, lun);
}
return 0;
} else {
return scsi_probe_bus(bus, targ, lun);
}
}
/* scsi_alloc_unit: Register a scsi_data pointer for a given
* unit in a given scsi_device structure.
*
* XXX dufault@hda.com: I still don't like the way this reallocs stuff -
* but at least now it is collected in one place instead of existing
* in multiple type drivers. I'd like it better if we had it do a
* second pass after it knew the sizes of everything and set up everything
* at once.
*/
static int
scsi_alloc_unit(struct scsi_link *sc_link)
{
u_int32_t unit;
struct scsi_data *sd;
struct scsi_device *dsw;
unit = sc_link->dev_unit;
dsw = sc_link->device;
/*
* allocate the per unit data area
*/
if (dsw->sizeof_scsi_data)
{
sd = malloc(dsw->sizeof_scsi_data, M_DEVBUF, M_NOWAIT);
if (!sd) {
printf("%s%ld: malloc failed for scsi_data\n",
sc_link->device->name, unit);
return 0;
}
bzero(sd, dsw->sizeof_scsi_data);
}
else
sd = 0;
sc_link->sd = sd;
if (extend_set(dsw->links, unit, (void *)sc_link) == 0) {
printf("%s%ld: Can't store link pointer.\n",
sc_link->device->name, unit);
free(sd, M_DEVBUF);
return 0;
}
return 1;
}
static void
scsi_free_unit(struct scsi_link *sc_link)
{
if (sc_link->sd)
{
free(sc_link->sd, M_DEVBUF);
sc_link->sd = 0;
}
extend_release(sc_link->device->links, sc_link->dev_unit);
}
#if NSCTARG > 0
/* XXX: It is a bug that the sc_link has this information
* about the adapter in it. The sc_link should refer to
* a structure that is host adpater specific. That will also
* pull all knowledge of an sc_link out of the adapter drivers.
*/
errval
scsi_set_bus(int bus, struct scsi_link *sc_link)
{
struct scsi_link *ad_link;
struct scsibus_data *scsibus_data;
if (bus < 0 || bus > scbusses->nelem) {
return ENXIO;
}
scsibus_data = (struct scsibus_data *)extend_get(scbusses, bus);
if(!scsibus_data) {
return ENXIO;
}
ad_link = scsibus_data->adapter_link;
sc_link->adapter_unit = ad_link->adapter_unit;
sc_link->adapter_targ = ad_link->adapter_targ;
sc_link->adapter = ad_link->adapter;
sc_link->device = ad_link->device;
sc_link->flags = ad_link->flags;
return 0;
}
/*
* Allocate and attach as many SCSI target devices as configured.
* There are two ways that you can configure the target device:
* 1. In the configuration file. That is handled here.
* 2. Via the minor number. That takes precedence over the config file.
*/
static errval
scsi_attach_sctarg()
{
struct scsi_link *sc_link = NULL;
int dev_unit;
struct scsi_device *sctarg = scsi_device_lookup(T_TARGET);
if (sctarg == 0) {
return ENXIO;
}
for (dev_unit = 0; dev_unit < NSCTARG; dev_unit++) {
int target, lun, bus;
/* If we don't have a link block allocate one.
*/
if (!sc_link) {
sc_link = malloc(sizeof(*sc_link), M_TEMP, M_NOWAIT);
}
scsi_sctarg_lookup(sctarg->name, dev_unit, &target, &lun, &bus);
if (IS_SPECIFIED(bus)) {
struct scsibus_data *scsibus_data;
if (bus < 0 || bus > scbusses->nelem) {
printf("%s%d: configured on illegal bus %d.\n",
sctarg->name, dev_unit, bus);
continue;
}
scsibus_data = (struct scsibus_data *)extend_get(scbusses, bus);
if(!scsibus_data) {
printf("%s%d: no bus %d.\n", sctarg->name, dev_unit, bus);
continue;
}
*sc_link = *scsibus_data->adapter_link; /* struct copy */
sc_link->target = target;
sc_link->lun = lun;
}
else {
/* This will be configured in the open routine.
*/
sc_link->scsibus = SCCONF_UNSPEC;
sc_link->target = SCCONF_UNSPEC;
sc_link->lun = SCCONF_UNSPEC;
}
sc_link->quirks = 0;
sc_link->device = sctarg;
sc_link->dev_unit = dev_unit;
if (scsi_alloc_unit(sc_link)) {
if (scsi_device_attach(sc_link) == 0) {
sc_link = NULL; /* it's been used */
}
else
scsi_free_unit(sc_link);
}
}
if (sc_link) {
free(sc_link, M_TEMP);
}
return 0;
}
#endif /* NSCTARG > 0 */
/*
* Allocate a scsibus_data structure
* The target/lun area is dynamically allocated in scsi_attachdevs after
* the controller driver has a chance to update the maxtarg field.
*/
struct scsibus_data*
scsi_alloc_bus()
{
struct scsibus_data *scbus;
/*
* Prepare the scsibus_data area for the upperlevel
* scsi code.
*/
scbus = malloc(sizeof(struct scsibus_data), M_TEMP, M_NOWAIT);
if(!scbus) {
printf("scsi_alloc_bus: - cannot malloc!\n");
return NULL;
}
bzero(scbus, sizeof(struct scsibus_data));
/* Setup the defaults */
scbus->maxtarg = 7;
scbus->maxlun = 7;
return scbus;
}
/*
* Probe the requested scsi bus. It must be already set up.
* targ and lun optionally narrow the search if not -1
*/
errval
scsi_probe_bus(int bus, int targ, int lun)
{
struct scsibus_data *scsibus_data ;
int maxtarg,mintarg,maxlun,minlun;
struct scsi_link *sc_link_proto;
u_int8_t scsi_addr ;
struct scsidevs *bestmatch = NULL;
struct scsi_link *sc_link = NULL;
boolean maybe_more;
int type;
if ((bus < 0 ) || ( bus >= scbusses->nelem)) {
return ENXIO;
}
scsibus_data = (struct scsibus_data *)extend_get(scbusses, bus);
if(!scsibus_data) return ENXIO;
sc_link_proto = scsibus_data->adapter_link;
scsi_addr = sc_link_proto->adapter_targ;
if(targ == -1){
maxtarg = scsibus_data->maxtarg;
mintarg = 0;
} else {
if((targ < 0 ) || (targ > scsibus_data->maxtarg)) return EINVAL;
maxtarg = mintarg = targ;
}
if(lun == -1){
maxlun = scsibus_data->maxlun;
minlun = 0;
} else {
if((lun < 0 ) || (lun > scsibus_data->maxlun)) return EINVAL;
maxlun = minlun = lun;
}
for ( targ = mintarg;targ <= maxtarg; targ++) {
maybe_more = 0; /* by default only check 1 lun */
if (targ == scsi_addr) {
continue;
}
for ( lun = minlun; lun <= maxlun ;lun++) {
/*
* The spot appears to already have something
* linked in, skip past it. Must be doing a 'reprobe'
*/
if((*scsibus_data->sc_link)[targ][lun])
{/* don't do this one, but check other luns */
maybe_more = 1;
continue;
}
/*
* If we presently don't have a link block
* then allocate one to use while probing
*/
if (!sc_link) {
sc_link = malloc(sizeof(*sc_link), M_TEMP, M_NOWAIT);
}
*sc_link = *sc_link_proto; /* struct copy */
sc_link->device = &probe_switch;
sc_link->target = targ;
sc_link->lun = lun;
sc_link->quirks = 0;
bestmatch = scsi_probedev(sc_link, &maybe_more, &type);
if (bestmatch) {
sc_link->quirks = bestmatch->quirks;
sc_link->devmodes = bestmatch->devmodes;
} else {
sc_link->quirks = 0;
sc_link->devmodes = NULL;
}
if (bestmatch) { /* FOUND */
sc_link->device = scsi_device_lookup(type);
(void)scsi_assign_unit(sc_link);
if (scsi_alloc_unit(sc_link)) {
if (scsi_device_attach(sc_link) == 0) {
(*scsibus_data->sc_link)[targ][lun] = sc_link;
sc_link = NULL; /* it's been used */
}
else
scsi_free_unit(sc_link);
}
}
if (!(maybe_more)) { /* nothing suggests we'll find more */
break; /* nothing here, skip to next targ */
}
/* otherwise something says we should look further */
}
}
if (sc_link) {
free(sc_link, M_TEMP);
}
return 0;
}
/* Return the scsi_link for this device, if any.
*/
struct scsi_link *
scsi_link_get(bus, targ, lun)
int bus;
int targ;
int lun;
{
struct scsibus_data *scsibus_data =
(struct scsibus_data *)extend_get(scbusses, bus);
return (scsibus_data) ? (*scsibus_data->sc_link)[targ][lun] : 0;
}
/* make_readable: Make the inquiry data readable. Anything less than a ' '
* is made a '?' and trailing spaces are removed.
*/
static void
make_readable(to, from, n)
char *to;
char *from;
size_t n;
{
int i;
for (i = 0; from[i] && i < n - 1; i++) {
if (from[i] < ' ')
to[i]='?';
else
to[i] = from[i];
}
while (i && to[i - 1] == ' ')
i--;
to[i] = 0;
}
/*
* given a target and lu, ask the device what
* it is, and find the correct driver table
* entry.
*/
static struct scsidevs *
scsi_probedev(sc_link, maybe_more, type_p)
boolean *maybe_more;
struct scsi_link *sc_link;
int *type_p;
{
u_int8_t target = sc_link->target;
u_int8_t lu = sc_link->lun;
struct scsidevs *bestmatch = (struct scsidevs *) 0;
int dtype = 0;
char *desc;
char *qtype;
struct scsi_inquiry_data *inqbuf;
u_int32_t len, qualifier, type;
boolean remov;
char manu[8 + 1];
char model[16 + 1];
char version[4 + 1];
inqbuf = &sc_link->inqbuf;
bzero(inqbuf, sizeof(*inqbuf));
/*
* Ask the device what it is
*/
#ifdef SCSIDEBUG
if ((target == DEBUGTARG) && (lu == DEBUGLUN))
sc_link->flags |= (DEBUGLEVEL);
else
sc_link->flags &= ~(SDEV_DB1 | SDEV_DB2 | SDEV_DB3 | SDEV_DB4);
#endif /* SCSIDEBUG */
/* catch unit attn */
scsi_test_unit_ready(sc_link, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT);
#ifdef DOUBTFULL
switch (scsi_test_unit_ready(sc_link, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT)) {
case 0: /* said it WAS ready */
case EBUSY: /* replied 'NOT READY' but WAS present, continue */
case ENXIO:
break;
case EIO: /* device timed out */
case EINVAL: /* Lun not supported */
default:
return (struct scsidevs *) 0;
}
#endif /*DOUBTFULL*/
#ifdef SCSI_2_DEF
/* some devices need to be told to go to SCSI2 */
/* However some just explode if you tell them this.. leave it out */
scsi_change_def(sc_link, SCSI_NOSLEEP | SCSI_NOMASK | SCSI_SILENT);
#endif /*SCSI_2_DEF */
/* Now go ask the device all about itself */
if (scsi_inquire(sc_link, inqbuf, SCSI_NOSLEEP | SCSI_NOMASK) != 0) {
return (struct scsidevs *) 0;
}
/*
* note what BASIC type of device it is
*/
type = inqbuf->device & SID_TYPE;
qualifier = inqbuf->device & SID_QUAL;
remov = inqbuf->dev_qual2 & SID_REMOVABLE;
/*
* Any device qualifier that has the top bit set (qualifier&4 != 0)
* is vendor specific and will match in the default of this switch.
*/
switch ((int)qualifier) {
case SID_QUAL_LU_OK:
qtype = "";
break;
case SID_QUAL_LU_OFFLINE:
qtype = "Supported device currently not connected";
break;
case SID_QUAL_RSVD: /* Peripheral qualifier reserved in SCSI-2 spec */
*maybe_more = 1;
return (struct scsidevs *) 0;
case SID_QUAL_BAD_LU: /* Target can not support a device on this unit */
/*
* Check for a non-existent unit. If the device is returning
* this much, then we must set the flag that has
* the searchers keep looking on other luns.
*/
*maybe_more = 1;
return (struct scsidevs *) 0;
default:
dtype = 1;
qtype = "Vendor specific peripheral qualifier";
*maybe_more = 1;
break;
}
if (dtype == 0) {
if (type == T_NODEVICE) {
*maybe_more = 1;
return (struct scsidevs *) 0;
}
dtype = 1;
}
/*
* Then if it's advanced enough, more detailed
* information
*/
if ((inqbuf->version & SID_ANSII) > 0) {
if ((len = inqbuf->additional_length
+ ((char *) inqbuf->unused
- (char *) inqbuf))
> (sizeof(struct scsi_inquiry_data) - 1))
len = sizeof(struct scsi_inquiry_data) - 1;
desc = inqbuf->vendor;
desc[len - (desc - (char *) inqbuf)] = 0;
make_readable(manu, inqbuf->vendor, sizeof(manu));
make_readable(model, inqbuf->product, sizeof(model));
make_readable(version, inqbuf->revision, sizeof(version));
} else {
/*
* If not advanced enough, use default values
*/
desc = "early protocol device";
make_readable(manu, "unknown", sizeof(manu));
make_readable(model, "unknown", sizeof(model));
make_readable(version, "????", sizeof(version));
}
sc_print_start(sc_link);
printf("\"%s %s %s\" ", manu, model, version );
printf("type %ld %sSCSI %d"
,type
,remov ? "removable " : "fixed "
,inqbuf->version & SID_ANSII
);
if (qtype[0]) {
sc_print_addr(sc_link);
printf(" qualifier %ld: %s" ,qualifier ,qtype);
}
printf("\n");
sc_print_finish();
/*
* Try make as good a match as possible with
* available sub drivers
*/
bestmatch = (scsi_selectdev(
qualifier, type, remov ? T_REMOV : T_FIXED, manu, model, version));
if ((bestmatch) && (bestmatch->flags & SC_MORE_LUS)) {
*maybe_more = 1;
}
/* If the device is unknown then we should be trying to look up a
* type driver based on the inquiry type.
*/
if (bestmatch == &unknowndev)
*type_p = type;
else
*type_p =
bestmatch->driver;
return bestmatch;
}
/* Try to find the major number for a device during attach.
*/
dev_t
scsi_dev_lookup(d_open)
d_open_t *d_open;
{
int i;
dev_t d = NODEV;
for (i = 0; i < nchrdev; i++)
if (cdevsw[i] && cdevsw[i]->d_open == d_open)
{
d = makedev(i, 0);
break;
}
return d;
}
/*
* Compare name with pattern, return 0 on match.
* Short pattern matches trailing blanks in name,
* wildcard '*' in pattern matches rest of name
*/
static int
match(pattern, name)
char *pattern;
char *name;
{
char c;
while (c = *pattern++)
{
if (c == '*') return 0;
if ((c == '?') && (*name > ' ')) continue;
if (c != *name++) return 1;
}
while (c = *name++)
{
if (c != ' ') return 1;
}
return 0;
}
/*
* Try make as good a match as possible with
* available sub drivers
*/
static struct scsidevs *
scsi_selectdev(qualifier, type, remov, manu, model, rev)
u_int32_t qualifier, type;
boolean remov;
char *manu, *model, *rev;
{
struct scsidevs *bestmatch = NULL;
struct scsidevs *thisentry;
type |= qualifier; /* why? */
for ( thisentry = knowndevs; thisentry->manufacturer; thisentry++ )
{
if (type != thisentry->type) {
continue;
}
if (remov != thisentry->removable) {
continue;
}
if (thisentry->flags & SC_SHOWME)
printf("\n%s-\n%s-", thisentry->manufacturer, manu);
if (match(thisentry->manufacturer, manu)) {
continue;
}
if (thisentry->flags & SC_SHOWME)
printf("\n%s-\n%s-", thisentry->model, model);
if (match(thisentry->model, model)) {
continue;
}
if (thisentry->flags & SC_SHOWME)
printf("\n%s-\n%s-", thisentry->version, rev);
if (match(thisentry->version, rev)) {
continue;
}
bestmatch = thisentry;
break;
}
if (bestmatch == (struct scsidevs *) 0) {
bestmatch = &unknowndev;
}
return (bestmatch);
}
int
scsi_externalize(struct scsi_link *sl, struct sysctl_req *req)
{
return SYSCTL_OUT(req, sl, sizeof *sl);
}
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