freebsd-dev/sys/scsi/ch.c

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1995-05-30 08:16:23 +00:00
/*
* Written by grefen@convex.com (probably moved by now)
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* Based on scsi drivers by Julian Elischer (julian@tfs.com)
*
* $FreeBSD$
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*/
#include <sys/types.h>
#include <ch.h>
#include "opt_scsi.h"
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#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/chio.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include <scsi/scsi_all.h>
#include <scsi/scsi_changer.h>
#include <scsi/scsiconf.h>
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#define CHRETRIES 2
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#define CHUNIT(DEV) ((minor(DEV)&0xF0) >> 4) /* 4 bit unit. */
#define CHSETUNIT(DEV, U) makedev(major(DEV), ((U) << 4))
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#define MODE(z) ( (minor(z) & 0x0F) )
#define ESUCCESS 0
struct scsi_data {
u_int32_t flags;
u_int16_t chmo; /* Offset of first CHM */
u_int16_t chms; /* No. of CHM */
u_int16_t slots; /* No. of Storage Elements */
u_int16_t sloto; /* Offset of first SE */
u_int16_t imexs; /* No. of Import/Export Slots */
u_int16_t imexo; /* Offset of first IM/EX */
u_int16_t drives; /* No. of CTS */
u_int16_t driveo; /* Offset of first CTS */
u_int16_t rot; /* CHM can rotate */
u_long op_matrix; /* possible opertaions */
u_int16_t lsterr; /* details of lasterror */
u_char stor; /* posible Storage locations */
#ifdef DEVFS
void *c_devfs_token;
void *ctl_devfs_token;
#endif
};
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static errval ch_getelem __P((u_int32_t unit, short *stat, int type, u_int32_t from,
void *data, u_int32_t flags));
static errval ch_move __P((u_int32_t unit, short *stat, u_int32_t chm, u_int32_t from,
u_int32_t to, u_int32_t flags));
static errval ch_mode_sense __P((u_int32_t unit, u_int32_t flags));
static errval ch_position __P((u_int32_t unit, short *stat, u_int32_t chm,
u_int32_t to, u_int32_t flags));
static int chunit(dev_t dev) { return CHUNIT(dev); }
static dev_t chsetunit(dev_t dev, int unit) { return CHSETUNIT(dev, unit); }
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static errval ch_open(dev_t dev, int flags, int fmt, struct proc *p,
struct scsi_link *sc_link);
static errval ch_ioctl(dev_t dev, int cmd, caddr_t addr, int flag,
struct proc *p, struct scsi_link *sc_link);
static errval ch_close(dev_t dev, int flag, int fmt, struct proc *p,
struct scsi_link *sc_link);
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static d_open_t chopen;
static d_close_t chclose;
static d_ioctl_t chioctl;
#define CDEV_MAJOR 17
static struct cdevsw ch_cdevsw =
{ chopen, chclose, noread, nowrite, /*17*/
chioctl, nostop, nullreset, nodevtotty,/* ch */
noselect, nommap, nostrat, "ch", NULL, -1 };
SCSI_DEVICE_ENTRIES(ch)
static struct scsi_device ch_switch =
{
NULL,
NULL,
NULL,
NULL,
"ch",
0,
{0, 0},
0, /* Link flags */
chattach,
"Medium-Changer",
chopen,
sizeof(struct scsi_data),
T_CHANGER,
chunit,
chsetunit,
ch_open,
ch_ioctl,
ch_close,
0,
};
#define CH_OPEN 0x01
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/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
static errval
chattach(struct scsi_link *sc_link)
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{
u_int32_t unit;
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struct scsi_data *ch = sc_link->sd;
unit = sc_link->dev_unit;
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/*
* 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("offline");
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} else {
printf("%d slot(s) %d drive(s) %d arm(s) %d i/e-slot(s)",
ch->slots, ch->drives, ch->chms, ch->imexs);
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}
#ifdef DEVFS
ch->c_devfs_token = devfs_add_devswf(&ch_cdevsw, unit << 4, DV_CHR,
UID_ROOT, GID_OPERATOR, 0600,
"ch%d", unit);
ch->ctl_devfs_token = devfs_add_devswf(&ch_cdevsw,
(unit << 4) | SCSI_CONTROL_MASK,
DV_CHR,
UID_ROOT, GID_OPERATOR, 0600,
"ch%d.ctl", unit);
#endif
return 0;
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}
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/*
* open the device.
*/
static errval
ch_open(dev_t dev, int flags, int fmt, struct proc *p,
struct scsi_link *sc_link)
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{
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errval errcode = 0;
u_int32_t unit, mode;
struct scsi_data *cd;
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unit = CHUNIT(dev);
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mode = MODE(dev);
cd = sc_link->sd;
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/*
* Only allow one at a time
*/
if (cd->flags & CH_OPEN) {
printf("ch%ld: already open\n", unit);
return EBUSY;
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}
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/*
* 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%ld: not ready\n", unit);
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sc_link->flags &= ~SDEV_OPEN;
return errcode;
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}
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/*
* Make sure data is loaded
*/
if ( (errcode = (ch_mode_sense(unit, SCSI_NOSLEEP | SCSI_NOMASK))) ) {
printf("ch%ld: scsi changer :- offline\n", unit);
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sc_link->flags &= ~SDEV_OPEN;
return (errcode);
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}
cd->flags = CH_OPEN;
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return 0;
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}
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/*
* close the device.. only called if we are the LAST
* occurence of an open device
*/
static errval
ch_close(dev_t dev, int flag, int fmt, struct proc *p,
struct scsi_link *sc_link)
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{
sc_link->sd->flags = 0;
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sc_link->flags &= ~SDEV_OPEN;
return (0);
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}
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/*
* Perform special action on behalf of the user
* Knows about the internals of this device
*/
static errval
ch_ioctl(dev_t dev, int cmd, caddr_t arg, int mode, struct proc *p,
struct scsi_link *sc_link)
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{
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/* struct ch_cmd_buf *args; */
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unsigned char unit;
u_int32_t flags;
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errval ret;
struct scsi_data *cd;
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/*
* Find the device that the user is talking about
*/
flags = 0; /* give error messages, act on errors etc. */
unit = CHUNIT(dev);
cd = sc_link->sd;
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switch ((int)cmd) {
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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 = cd->chmo;
ch->u.getparam.chms = cd->chms;
ch->u.getparam.sloto = cd->sloto;
ch->u.getparam.slots = cd->slots;
ch->u.getparam.imexo = cd->imexo;
ch->u.getparam.imexs = cd->imexs;
ch->u.getparam.driveo = cd->driveo;
ch->u.getparam.drives = cd->drives;
ch->u.getparam.rot = cd->rot;
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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;
}
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}
default:
return scsi_do_ioctl(dev, cmd, arg, mode, p, sc_link);
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}
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return (ret ? ESUCCESS : EIO);
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}
static errval
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ch_getelem(unit, stat, type, from, data, flags)
u_int32_t unit, from, flags;
int type;
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short *stat;
void *data; /* XXX `struct untagged *' - see chio.h */
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{
struct scsi_read_element_status scsi_cmd;
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char elbuf[32];
errval ret;
struct scsi_link *sc_link;
if ((sc_link = SCSI_LINK(&ch_switch, unit)) == 0)
return ENXIO;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = READ_ELEMENT_STATUS;
scsi_cmd.byte2 = type;
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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(sc_link,
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(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
(u_char *) elbuf,
32,
CHRETRIES,
100000,
NULL,
SCSI_DATA_IN | flags) != ESUCCESS)) {
*stat = sc_link->sd->lsterr;
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bcopy(elbuf + 16, data, 16);
return ret;
}
bcopy(elbuf + 16, data, 16); /*Just a hack sh */
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return ret;
}
static errval
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ch_move(unit, stat, chm, from, to, flags)
u_int32_t unit, chm, from, to, flags;
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short *stat;
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{
struct scsi_move_medium scsi_cmd;
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errval ret;
struct scsi_link *sc_link;
if ((sc_link = SCSI_LINK(&ch_switch, unit)) == 0)
return ENXIO;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = MOVE_MEDIUM;
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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(sc_link,
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(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
NULL,
0,
CHRETRIES,
100000,
NULL,
flags) != ESUCCESS)) {
*stat = sc_link->sd->lsterr;
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return ret;
}
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return ret;
}
static errval
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ch_position(unit, stat, chm, to, flags)
u_int32_t unit, chm, to, flags;
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short *stat;
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{
struct scsi_position_to_element scsi_cmd;
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errval ret;
struct scsi_link *sc_link;
if ((sc_link = SCSI_LINK(&ch_switch, unit)) == 0)
return ENXIO;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.op_code = POSITION_TO_ELEMENT;
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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(sc_link,
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(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
NULL,
0,
CHRETRIES,
100000,
NULL,
flags) != ESUCCESS)) {
*stat = sc_link->sd->lsterr;
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return ret;
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}
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return ret;
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}
#ifdef __STDC__
#define b2tol(a) (((unsigned)(a##_1) << 8) + (unsigned)a##_0 )
#else
#define b2tol(a) (((unsigned)(a/**/_1) << 8) + (unsigned)a/**/_0 )
#endif
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/*
* Get the scsi driver to send a full inquiry to the
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* device and use the results to fill out the global
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* parameter structure.
*/
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static errval
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ch_mode_sense(unit, flags)
u_int32_t unit, flags;
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{
struct scsi_mode_sense scsi_cmd;
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u_char scsi_sense[128]; /* Can't use scsi_mode_sense_data because of
* missing block descriptor
*/
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u_char *b;
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int32_t i, l;
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errval errcode;
struct scsi_data *cd;
struct scsi_link *sc_link;
if ((sc_link = SCSI_LINK(&ch_switch, unit)) == 0)
return ENXIO;
cd = sc_link->sd;
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/*
* First check if we have it all loaded
*/
if (sc_link->flags & SDEV_MEDIA_LOADED)
return 0;
/*
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* First do a mode sense
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*/
/* 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,
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(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) ) {
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if (!(flags & SCSI_SILENT))
printf("ch%ld: could not mode sense\n", unit);
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return (errcode);
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}
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sc_link->flags |= SDEV_MEDIA_LOADED;
l = scsi_sense[0] - 3;
b = &scsi_sense[4];
/*
* To avoid alignment problems
*/
/* XXX - FIX THIS FOR MSB */
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#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
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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");
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#endif
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for (i = 0; i < l;) {
u_int32_t pc = (*b++) & 0x3f;
u_int32_t pl = *b++;
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u_char *bb = b;
switch ((int)pc) {
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case 0x1d:
cd->chmo = p2copy(bb);
cd->chms = p2copy(bb);
cd->sloto = p2copy(bb);
cd->slots = p2copy(bb);
cd->imexo = p2copy(bb);
cd->imexs = p2copy(bb);
cd->driveo = p2copy(bb);
cd->drives = p2copy(bb);
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break;
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case 0x1e:
cd->rot = (*b) & 1;
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break;
case 0x1f:
cd->stor = *b & 0xf;
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bb += 2;
cd->stor = p4copy(bb);
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break;
default:
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break;
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}
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b += pl;
i += pl + 2;
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}
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SC_DEBUG(sc_link, SDEV_DB2,
(" cht(%d-%d)slot(%d-%d)imex(%d-%d)cts(%d-%d) %s rotate\n",
cd->chmo, cd->chms,
cd->sloto, cd->slots,
cd->imexo, cd->imexs,
cd->driveo, cd->drives,
cd->rot ? "can" : "can't"));
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return (0);
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}
static ch_devsw_installed = 0;
static void ch_drvinit(void *unused)
{
dev_t dev;
if( ! ch_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&ch_cdevsw, NULL);
ch_devsw_installed = 1;
}
}
SYSINIT(chdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ch_drvinit,NULL)