projects / unix-history / blob
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
syscons util remove use kbdcontrol & vidcontrol instead
[unix-history] / sys / scsi / ch.c
/*
* Written by grefen@?????
* Based on scsi drivers by Julian Elischer (julian@tfs.com)
*
* $Id: ch.c,v 1.7 1993/12/19 00:54:49 wollman Exp $
*/
#include <sys/types.h>
#include <ch.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/chio.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_changer.h>
#include <scsi/scsiconf.h>
static errval ch_mode_sense(u_int32, u_int32);
struct scsi_xfer ch_scsi_xfer[NCH];
u_int32 ch_xfer_block_wait[NCH];
#define PAGESIZ 4096
#define STQSIZE 4
#define CHRETRIES 2
#define MODE(z) ( (minor(z) & 0x0F) )
#define UNIT(z) ( (minor(z) >> 4) )
#define ESUCCESS 0
errval chattach();
/*
* This driver is so simple it uses all the default services
*/
struct scsi_device ch_switch =
{
NULL,
NULL,
NULL,
NULL,
"ch",
0,
0, 0
};
struct ch_data {
u_int32 flags;
struct scsi_link *sc_link; /* all the inter level info */
u_int16 chmo; /* Offset of first CHM */
u_int16 chms; /* No. of CHM */
u_int16 slots; /* No. of Storage Elements */
u_int16 sloto; /* Offset of first SE */
u_int16 imexs; /* No. of Import/Export Slots */
u_int16 imexo; /* Offset of first IM/EX */
u_int16 drives; /* No. of CTS */
u_int16 driveo; /* Offset of first CTS */
u_int16 rot; /* CHM can rotate */
u_long op_matrix; /* possible opertaions */
u_int16 lsterr; /* details of lasterror */
u_char stor; /* posible Storage locations */
u_int32 initialized;
} ch_data[NCH];
#define CH_OPEN 0x01
#define CH_KNOWN 0x02
static u_int32 next_ch_unit = 0;
/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
errval
chattach(sc_link)
struct scsi_link *sc_link;
{
u_int32 unit, i, stat;
unsigned char *tbl;
SC_DEBUG(sc_link, SDEV_DB2, ("chattach: "));
/*
* Check we have the resources for another drive
*/
unit = next_ch_unit++;
if (unit >= NCH) {
printf("Too many scsi changers..(%d > %d) reconfigure kernel\n", (unit + 1), NCH);
return (0);
}
/*
* Store information needed to contact our base driver
*/
ch_data[unit].sc_link = sc_link;
sc_link->device = &ch_switch;
sc_link->dev_unit = unit;
/*
* Use the subdriver to request information regarding
* the drive. We cannot use interrupts yet, so the
* request must specify this.
*/
if ((ch_mode_sense(unit, SCSI_NOSLEEP | SCSI_NOMASK /*| SCSI_SILENT */ ))) {
printf("ch%d: scsi changer :- offline\n", unit);
stat = CH_OPEN;
} else {
printf("ch%d: scsi changer, %d slot(s) %d drive(s) %d arm(s) %d i/e-slot(s)\n",
unit, ch_data[unit].slots, ch_data[unit].drives, ch_data[unit].chms, ch_data[unit].imexs);
stat = CH_KNOWN;
}
ch_data[unit].initialized = 1;
return 1;
/* XXX ??? is this the right return val? */
}
/*
* open the device.
*/
errval
chopen(dev)
dev_t dev;
{
errval errcode = 0;
u_int32 unit, mode;
struct scsi_link *sc_link;
unit = UNIT(dev);
mode = MODE(dev);
/*
* Check the unit is legal
*/
if (unit >= NCH) {
printf("ch%d: ch %d > %d\n", unit, unit, NCH);
errcode = ENXIO;
return (errcode);
}
/*
* Only allow one at a time
*/
if (ch_data[unit].flags & CH_OPEN) {
printf("ch%d: already open\n", unit);
return EBUSY;
}
/*
* Make sure the device has been initialised
*/
if (!ch_data[unit].initialized)
return (ENXIO);
sc_link = ch_data[unit].sc_link;
SC_DEBUG(sc_link, SDEV_DB1, ("chopen: dev=0x%x (unit %d (of %d))\n"
,dev, unit, NCH));
/*
* Catch any unit attention errors.
*/
scsi_test_unit_ready(sc_link, SCSI_SILENT);
sc_link->flags |= SDEV_OPEN;
/*
* Check that it is still responding and ok.
*/
if (errcode = (scsi_test_unit_ready(sc_link, 0))) {
printf("ch%d: not ready\n", unit);
sc_link->flags &= ~SDEV_OPEN;
return errcode;
}
/*
* Make sure data is loaded
*/
if (errcode = (ch_mode_sense(unit, SCSI_NOSLEEP | SCSI_NOMASK))) {
printf("ch%d: scsi changer :- offline\n", unit);
sc_link->flags &= ~SDEV_OPEN;
return (errcode);
}
ch_data[unit].flags = CH_OPEN;
return 0;
}
/*
* close the device.. only called if we are the LAST
* occurence of an open device
*/
errval
chclose(dev)
dev_t dev;
{
unsigned char unit, mode;
struct scsi_link *sc_link;
unit = UNIT(dev);
mode = MODE(dev);
sc_link = ch_data[unit].sc_link;
SC_DEBUG(sc_link, SDEV_DB1, ("Closing device"));
ch_data[unit].flags = 0;
sc_link->flags &= ~SDEV_OPEN;
return (0);
}
/*
* Perform special action on behalf of the user
* Knows about the internals of this device
*/
errval
chioctl(dev, cmd, arg, mode)
dev_t dev;
u_int32 cmd;
caddr_t arg;
int mode;
{
/* struct ch_cmd_buf *args; */
union scsi_cmd *scsi_cmd;
register i, j;
u_int32 opri;
errval errcode = 0;
unsigned char unit;
u_int32 number, flags;
errval ret;
struct scsi_link *sc_link;
/*
* Find the device that the user is talking about
*/
flags = 0; /* give error messages, act on errors etc. */
unit = UNIT(dev);
sc_link = ch_data[unit].sc_link;
switch ((int)cmd) {
case CHIOOP:{
struct chop *ch = (struct chop *) arg;
SC_DEBUG(sc_link, SDEV_DB2,
("[chtape_chop: %x]\n", ch->ch_op));
switch ((short) (ch->ch_op)) {
case CHGETPARAM:
ch->u.getparam.chmo = ch_data[unit].chmo;
ch->u.getparam.chms = ch_data[unit].chms;
ch->u.getparam.sloto = ch_data[unit].sloto;
ch->u.getparam.slots = ch_data[unit].slots;
ch->u.getparam.imexo = ch_data[unit].imexo;
ch->u.getparam.imexs = ch_data[unit].imexs;
ch->u.getparam.driveo = ch_data[unit].driveo;
ch->u.getparam.drives = ch_data[unit].drives;
ch->u.getparam.rot = ch_data[unit].rot;
ch->result = 0;
return 0;
break;
case CHPOSITION:
return ch_position(unit, &ch->result, ch->u.position.chm,
ch->u.position.to,
flags);
case CHMOVE:
return ch_move(unit, &ch->result, ch->u.position.chm,
ch->u.move.from, ch->u.move.to,
flags);
case CHGETELEM:
return ch_getelem(unit, &ch->result, ch->u.get_elem_stat.type,
ch->u.get_elem_stat.from, &ch->u.get_elem_stat.elem_data,
flags);
default:
return EINVAL;
}
}
default:
return scsi_do_ioctl(sc_link, cmd, arg, mode);
}
return (ret ? ESUCCESS : EIO);
}
errval
ch_getelem(unit, stat, type, from, data, flags)
u_int32 unit, from, flags;
int type;
short *stat;
char *data;
{
struct scsi_read_element_status scsi_cmd;
char elbuf[32];
errval ret;
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = READ_ELEMENT_STATUS;
scsi_cmd.byte2 = type;
scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff;
scsi_cmd.starting_element_addr[1] = from & 0xff;
scsi_cmd.number_of_elements[1] = 1;
scsi_cmd.allocation_length[2] = 32;
if ((ret = scsi_scsi_cmd(ch_data[unit].sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
(u_char *) elbuf,
32,
CHRETRIES,
100000,
NULL,
SCSI_DATA_IN | flags) != ESUCCESS)) {
*stat = ch_data[unit].lsterr;
bcopy(elbuf + 16, data, 16);
return ret;
}
bcopy(elbuf + 16, data, 16); /*Just a hack sh */
return ret;
}
errval
ch_move(unit, stat, chm, from, to, flags)
u_int32 unit, chm, from, to, flags;
short *stat;
{
struct scsi_move_medium scsi_cmd;
errval ret;
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = MOVE_MEDIUM;
scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
scsi_cmd.transport_element_address[1] = chm & 0xff;
scsi_cmd.source_address[0] = (from >> 8) & 0xff;
scsi_cmd.source_address[1] = from & 0xff;
scsi_cmd.destination_address[0] = (to >> 8) & 0xff;
scsi_cmd.destination_address[1] = to & 0xff;
scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
if ((ret = scsi_scsi_cmd(ch_data[unit].sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
NULL,
0,
CHRETRIES,
100000,
NULL,
flags) != ESUCCESS)) {
*stat = ch_data[unit].lsterr;
return ret;
}
return ret;
}
errval
ch_position(unit, stat, chm, to, flags)
u_int32 unit, chm, to, flags;
short *stat;
{
struct scsi_position_to_element scsi_cmd;
errval ret;
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = POSITION_TO_ELEMENT;
scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
scsi_cmd.transport_element_address[1] = chm & 0xff;
scsi_cmd.source_address[0] = (to >> 8) & 0xff;
scsi_cmd.source_address[1] = to & 0xff;
scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
if ((ret = scsi_scsi_cmd(ch_data[unit].sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
NULL,
0,
CHRETRIES,
100000,
NULL,
flags) != ESUCCESS)) {
*stat = ch_data[unit].lsterr;
return ret;
}
return ret;
}
#ifdef __STDC__
#define b2tol(a) (((unsigned)(a##_1) << 8) + (unsigned)a##_0 )
#else
#define b2tol(a) (((unsigned)(a/**/_1) << 8) + (unsigned)a/**/_0 )
#endif
/*
* Get the scsi driver to send a full inquiry to the
* device and use the results to fill out the global
* parameter structure.
*/
static errval
ch_mode_sense(unit, flags)
u_int32 unit, flags;
{
struct scsi_mode_sense scsi_cmd;
u_char scsi_sense[128]; /* Can't use scsi_mode_sense_data because of
* missing block descriptor
*/
u_char *b;
int32 i, l;
errval errcode;
struct scsi_link *sc_link = ch_data[unit].sc_link;
/*
* First check if we have it all loaded
*/
if (sc_link->flags & SDEV_MEDIA_LOADED)
return 0;
/*
* First do a mode sense
*/
/* sc_link->flags &= ~SDEV_MEDIA_LOADED; *//*XXX */
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = MODE_SENSE;
scsi_cmd.byte2 = SMS_DBD;
scsi_cmd.page = 0x3f; /* All Pages */
scsi_cmd.length = sizeof(scsi_sense);
/*
* Read in the pages
*/
if (errcode = scsi_scsi_cmd(sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(struct scsi_mode_sense),
(u_char *) & scsi_sense,
sizeof (scsi_sense),
CHRETRIES,
5000,
NULL,
flags | SCSI_DATA_IN) != 0) {
if (!(flags & SCSI_SILENT))
printf("ch%d: could not mode sense\n", unit);
return (errcode);
}
sc_link->flags |= SDEV_MEDIA_LOADED;
l = scsi_sense[0] - 3;
b = &scsi_sense[4];
/*
* To avoid alignment problems
*/
/* XXX - FIX THIS FOR MSB */
#define p2copy(valp) (valp[1]+ (valp[0]<<8));valp+=2
#define p4copy(valp) (valp[3]+ (valp[2]<<8) + (valp[1]<<16) + (valp[0]<<24));valp+=4
#if 0
printf("\nmode_sense %d\n", l);
for (i = 0; i < l + 4; i++) {
printf("%x%c", scsi_sense[i], i % 8 == 7 ? '\n' : ':');
} printf("\n");
#endif
for (i = 0; i < l;) {
u_int32 pc = (*b++) & 0x3f;
u_int32 pl = *b++;
u_char *bb = b;
switch ((int)pc) {
case 0x1d:
ch_data[unit].chmo = p2copy(bb);
ch_data[unit].chms = p2copy(bb);
ch_data[unit].sloto = p2copy(bb);
ch_data[unit].slots = p2copy(bb);
ch_data[unit].imexo = p2copy(bb);
ch_data[unit].imexs = p2copy(bb);
ch_data[unit].driveo = p2copy(bb);
ch_data[unit].drives = p2copy(bb);
break;
case 0x1e:
ch_data[unit].rot = (*b) & 1;
break;
case 0x1f:
ch_data[unit].stor = *b & 0xf;
bb += 2;
ch_data[unit].stor = p4copy(bb);
break;
default:
break;
}
b += pl;
i += pl + 2;
}
SC_DEBUG(sc_link, SDEV_DB2,
(" cht(%d-%d)slot(%d-%d)imex(%d-%d)cts(%d-%d) %s rotate\n",
ch_data[unit].chmo, ch_data[unit].chms,
ch_data[unit].sloto, ch_data[unit].slots,
ch_data[unit].imexo, ch_data[unit].imexs,
ch_data[unit].driveo, ch_data[unit].drives,
ch_data[unit].rot ? "can" : "can't"));
return (0);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.