1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
|
/*
* Written by grefen@convex.com (probably moved by now)
* Based on scsi drivers by Julian Elischer (julian@tfs.com)
*
* $Id: ch.c,v 1.31 1996/03/10 18:17:53 davidg 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/chio.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/devconf.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include <scsi/scsi_all.h>
#include <scsi/scsi_changer.h>
#include <scsi/scsiconf.h>
#define CHRETRIES 2
#define CHUNIT(DEV) ((minor(DEV)&0xF0) >> 4) /* 4 bit unit. */
#define CHSETUNIT(DEV, U) makedev(major(DEV), ((U) << 4))
#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
};
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); }
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);
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
static int
ch_externalize(struct kern_devconf *kdc, struct sysctl_req *req)
{
return scsi_externalize(SCSI_LINK(&ch_switch, kdc->kdc_unit), req);
}
static struct kern_devconf kdc_ch_template = {
0, 0, 0, /* filled in by dev_attach */
"ch", 0, MDDC_SCSI,
ch_externalize, 0, scsi_goaway, SCSI_EXTERNALLEN,
&kdc_scbus0, /* parent */
0, /* parentdata */
DC_UNKNOWN, /* not supported */
};
static inline void
ch_registerdev(int unit)
{
struct kern_devconf *kdc;
MALLOC(kdc, struct kern_devconf *, sizeof *kdc, M_TEMP, M_NOWAIT);
if(!kdc) return;
*kdc = kdc_ch_template;
kdc->kdc_unit = unit;
kdc->kdc_description = ch_switch.desc;
dev_attach(kdc);
}
/*
* 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)
{
u_int32_t unit;
struct scsi_data *ch = sc_link->sd;
unit = sc_link->dev_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("offline");
} else {
printf("%d slot(s) %d drive(s) %d arm(s) %d i/e-slot(s)",
ch->slots, ch->drives, ch->chms, ch->imexs);
}
ch_registerdev(unit);
#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;
}
/*
* open the device.
*/
static errval
ch_open(dev_t dev, int flags, int fmt, struct proc *p,
struct scsi_link *sc_link)
{
errval errcode = 0;
u_int32_t unit, mode;
struct scsi_data *cd;
unit = CHUNIT(dev);
mode = MODE(dev);
cd = sc_link->sd;
/*
* Only allow one at a time
*/
if (cd->flags & CH_OPEN) {
printf("ch%ld: already open\n", unit);
return EBUSY;
}
/*
* 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);
sc_link->flags &= ~SDEV_OPEN;
return errcode;
}
/*
* Make sure data is loaded
*/
if ( (errcode = (ch_mode_sense(unit, SCSI_NOSLEEP | SCSI_NOMASK))) ) {
printf("ch%ld: scsi changer :- offline\n", unit);
sc_link->flags &= ~SDEV_OPEN;
return (errcode);
}
cd->flags = CH_OPEN;
return 0;
}
/*
* 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)
{
sc_link->sd->flags = 0;
sc_link->flags &= ~SDEV_OPEN;
return (0);
}
/*
* 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)
{
/* struct ch_cmd_buf *args; */
unsigned char unit;
u_int32_t flags;
errval ret;
struct scsi_data *cd;
/*
* 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;
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 = 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;
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(dev, cmd, arg, mode, p, sc_link);
}
return (ret ? ESUCCESS : EIO);
}
static errval
ch_getelem(unit, stat, type, from, data, flags)
u_int32_t unit, from, flags;
int type;
short *stat;
void *data; /* XXX `struct untagged *' - see chio.h */
{
struct scsi_read_element_status scsi_cmd;
char elbuf[32];
errval ret;
struct scsi_link *sc_link;
if ((sc_link = SCSI_LINK(&ch_switch, unit)) == 0)
return ENXIO;
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(sc_link,
(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;
bcopy(elbuf + 16, data, 16);
return ret;
}
bcopy(elbuf + 16, data, 16); /*Just a hack sh */
return ret;
}
static errval
ch_move(unit, stat, chm, from, to, flags)
u_int32_t unit, chm, from, to, flags;
short *stat;
{
struct scsi_move_medium scsi_cmd;
errval ret;
struct scsi_link *sc_link;
if ((sc_link = SCSI_LINK(&ch_switch, unit)) == 0)
return ENXIO;
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(sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
NULL,
0,
CHRETRIES,
100000,
NULL,
flags) != ESUCCESS)) {
*stat = sc_link->sd->lsterr;
return ret;
}
return ret;
}
static errval
ch_position(unit, stat, chm, to, flags)
u_int32_t unit, chm, to, flags;
short *stat;
{
struct scsi_position_to_element scsi_cmd;
errval ret;
struct scsi_link *sc_link;
if ((sc_link = SCSI_LINK(&ch_switch, unit)) == 0)
return ENXIO;
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(sc_link,
(struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd),
NULL,
0,
CHRETRIES,
100000,
NULL,
flags) != ESUCCESS)) {
*stat = sc_link->sd->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_t 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_t i, l;
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;
/*
* 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%ld: 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_t pc = (*b++) & 0x3f;
u_int32_t pl = *b++;
u_char *bb = b;
switch ((int)pc) {
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);
break;
case 0x1e:
cd->rot = (*b) & 1;
break;
case 0x1f:
cd->stor = *b & 0xf;
bb += 2;
cd->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",
cd->chmo, cd->chms,
cd->sloto, cd->slots,
cd->imexo, cd->imexs,
cd->driveo, cd->drives,
cd->rot ? "can" : "can't"));
return (0);
}
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)
|