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Incorporate the O_NONBLOCK open semantics of Linux and Solaris.
[dragonfly.git] / sys / bus / cam / scsi / scsi_sa.c
blob3f605ffc97b20b81d6b203364eda140873c367c6
1 /*
2 * $FreeBSD: src/sys/cam/scsi/scsi_sa.c,v 1.45.2.13 2002/12/17 17:08:50 trhodes Exp $
3 * $DragonFly: src/sys/bus/cam/scsi/scsi_sa.c,v 1.33 2007/12/02 01:46:13 pavalos Exp $
4 *
5 * Implementation of SCSI Sequential Access Peripheral driver for CAM.
6 *
7 * Copyright (c) 1999, 2000 Matthew Jacob
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions, and the following disclaimer,
15 * without modification, immediately at the beginning of the file.
16 * 2. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33 #include <sys/param.h>
34 #include <sys/queue.h>
35 #ifdef _KERNEL
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #endif
39 #include <sys/types.h>
40 #ifdef _KERNEL
41 #include <sys/buf.h>
42 #include <sys/malloc.h>
43 #endif
44 #include <sys/mtio.h>
45 #include <sys/conf.h>
46 #ifdef _KERNEL
47 #include <sys/proc.h>
48 #include <sys/buf2.h>
49 #include <sys/thread2.h>
50 #endif
51 #include <sys/fcntl.h>
52 #include <sys/devicestat.h>
53 #include <machine/limits.h>
54
55 #ifndef _KERNEL
56 #include <stdio.h>
57 #include <string.h>
58 #endif
59
60 #include "../cam.h"
61 #include "../cam_ccb.h"
62 #include "../cam_extend.h"
63 #include "../cam_periph.h"
64 #include "../cam_xpt_periph.h"
65 #include "../cam_debug.h"
66
67 #include "scsi_all.h"
68 #include "scsi_message.h"
69 #include "scsi_sa.h"
70
71 #ifdef _KERNEL
72
73 #include <opt_sa.h>
74
75 #ifndef SA_IO_TIMEOUT
76 #define SA_IO_TIMEOUT 4
77 #endif
78 #ifndef SA_SPACE_TIMEOUT
79 #define SA_SPACE_TIMEOUT 1 * 60
80 #endif
81 #ifndef SA_REWIND_TIMEOUT
82 #define SA_REWIND_TIMEOUT 2 * 60
83 #endif
84 #ifndef SA_ERASE_TIMEOUT
85 #define SA_ERASE_TIMEOUT 4 * 60
86 #endif
87
88 #define SCSIOP_TIMEOUT (60 * 1000) /* not an option */
89
90 #define IO_TIMEOUT (SA_IO_TIMEOUT * 60 * 1000)
91 #define REWIND_TIMEOUT (SA_REWIND_TIMEOUT * 60 * 1000)
92 #define ERASE_TIMEOUT (SA_ERASE_TIMEOUT * 60 * 1000)
93 #define SPACE_TIMEOUT (SA_SPACE_TIMEOUT * 60 * 1000)
94
95 /*
96 * Additional options that can be set for config: SA_1FM_AT_EOT
97 */
98
99 #ifndef UNUSED_PARAMETER
100 #define UNUSED_PARAMETER(x) x = x
101 #endif
102
103 #define QFRLS(ccb) \
104 if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \
105 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE)
106
107 /*
108 * Driver states
109 */
110
111 MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers");
112
113 typedef enum {
114 SA_STATE_NORMAL, SA_STATE_ABNORMAL
115 } sa_state;
116
117 #define ccb_pflags ppriv_field0
118 #define ccb_bio ppriv_ptr1
119
120 #define SA_CCB_BUFFER_IO 0x0
121 #define SA_CCB_WAITING 0x1
122 #define SA_CCB_TYPEMASK 0x1
123 #define SA_POSITION_UPDATED 0x2
124
125 #define Set_CCB_Type(x, type) \
126 x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK; \
127 x->ccb_h.ccb_pflags |= type
128
129 #define CCB_Type(x) (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK)
130
131
132
133 typedef enum {
134 SA_FLAG_OPEN = 0x0001,
135 SA_FLAG_FIXED = 0x0002,
136 SA_FLAG_TAPE_LOCKED = 0x0004,
137 SA_FLAG_TAPE_MOUNTED = 0x0008,
138 SA_FLAG_TAPE_WP = 0x0010,
139 SA_FLAG_TAPE_WRITTEN = 0x0020,
140 SA_FLAG_EOM_PENDING = 0x0040,
141 SA_FLAG_EIO_PENDING = 0x0080,
142 SA_FLAG_EOF_PENDING = 0x0100,
143 SA_FLAG_ERR_PENDING = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
144 SA_FLAG_EOF_PENDING),
145 SA_FLAG_INVALID = 0x0200,
146 SA_FLAG_COMP_ENABLED = 0x0400,
147 SA_FLAG_COMP_SUPP = 0x0800,
148 SA_FLAG_COMP_UNSUPP = 0x1000,
149 SA_FLAG_TAPE_FROZEN = 0x2000
150 } sa_flags;
151
152 typedef enum {
153 SA_MODE_REWIND = 0x00,
154 SA_MODE_NOREWIND = 0x01,
155 SA_MODE_OFFLINE = 0x02
156 } sa_mode;
157
158 typedef enum {
159 SA_PARAM_NONE = 0x00,
160 SA_PARAM_BLOCKSIZE = 0x01,
161 SA_PARAM_DENSITY = 0x02,
162 SA_PARAM_COMPRESSION = 0x04,
163 SA_PARAM_BUFF_MODE = 0x08,
164 SA_PARAM_NUMBLOCKS = 0x10,
165 SA_PARAM_WP = 0x20,
166 SA_PARAM_SPEED = 0x40,
167 SA_PARAM_ALL = 0x7f
168 } sa_params;
169
170 typedef enum {
171 SA_QUIRK_NONE = 0x00,
172 SA_QUIRK_NOCOMP = 0x01, /* Can't deal with compression at all */
173 SA_QUIRK_FIXED = 0x02, /* Force fixed mode */
174 SA_QUIRK_VARIABLE = 0x04, /* Force variable mode */
175 SA_QUIRK_2FM = 0x08, /* Needs Two File Marks at EOD */
176 SA_QUIRK_1FM = 0x10, /* No more than 1 File Mark at EOD */
177 SA_QUIRK_NODREAD = 0x20, /* Don't try and dummy read density */
178 SA_QUIRK_NO_MODESEL = 0x40, /* Don't do mode select at all */
179 SA_QUIRK_NO_CPAGE = 0x80 /* Don't use DEVICE COMPRESSION page */
180 } sa_quirks;
181
182 /* units are bits 4-7, 16-21 (1024 units) */
183 #define SAUNIT(DEV) \
184 (((minor(DEV) & 0xF0) >> 4) | ((minor(DEV) & 0x3f0000) >> 16))
185
186 #define SAMODE(z) ((minor(z) & 0x3))
187 #define SADENSITY(z) (((minor(z) >> 2) & 0x3))
188 #define SA_IS_CTRL(z) (minor(z) & (1 << 29))
189
190 #define SA_NOT_CTLDEV 0
191 #define SA_CTLDEV 1
192
193 #define SA_ATYPE_R 0
194 #define SA_ATYPE_NR 1
195 #define SA_ATYPE_ER 2
196
197 #define SAMINOR(ctl, unit, mode, access) \
198 ((ctl << 29) | ((unit & 0x3f0) << 16) | ((unit & 0xf) << 4) | \
199 (mode << 0x2) | (access & 0x3))
200
201 #define SA_UNITMASK SAMINOR(0, -1, 0, 0)
202 #define SA_UNIT(unit) SAMINOR(0, unit, 0, 0)
203
204 #define SA_NUM_MODES 4
205
206 struct sa_softc {
207 sa_state state;
208 sa_flags flags;
209 sa_quirks quirks;
210 struct bio_queue_head bio_queue;
211 int queue_count;
212 struct devstat device_stats;
213 int blk_gran;
214 int blk_mask;
215 int blk_shift;
216 u_int32_t max_blk;
217 u_int32_t min_blk;
218 u_int32_t comp_algorithm;
219 u_int32_t saved_comp_algorithm;
220 u_int32_t media_blksize;
221 u_int32_t last_media_blksize;
222 u_int32_t media_numblks;
223 u_int8_t media_density;
224 u_int8_t speed;
225 u_int8_t scsi_rev;
226 u_int8_t dsreg; /* mtio mt_dsreg, redux */
227 int buffer_mode;
228 int filemarks;
229 union ccb saved_ccb;
230 int last_resid_was_io;
231
232 /*
233 * Relative to BOT Location.
234 */
235 daddr_t fileno;
236 daddr_t blkno;
237
238 /*
239 * Latched Error Info
240 */
241 struct {
242 struct scsi_sense_data _last_io_sense;
243 u_int32_t _last_io_resid;
244 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
245 struct scsi_sense_data _last_ctl_sense;
246 u_int32_t _last_ctl_resid;
247 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
248 #define last_io_sense errinfo._last_io_sense
249 #define last_io_resid errinfo._last_io_resid
250 #define last_io_cdb errinfo._last_io_cdb
251 #define last_ctl_sense errinfo._last_ctl_sense
252 #define last_ctl_resid errinfo._last_ctl_resid
253 #define last_ctl_cdb errinfo._last_ctl_cdb
254 } errinfo;
255 /*
256 * Misc other flags/state
257 */
258 u_int32_t
259 : 29,
260 open_rdonly : 1, /* open read-only */
261 open_pending_mount : 1, /* open pending mount */
262 ctrl_mode : 1; /* control device open */
263 };
264
265 struct sa_quirk_entry {
266 struct scsi_inquiry_pattern inq_pat; /* matching pattern */
267 sa_quirks quirks; /* specific quirk type */
268 u_int32_t prefblk; /* preferred blocksize when in fixed mode */
269 };
270
271 static struct sa_quirk_entry sa_quirk_table[] =
272 {
273 {
274 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
275 "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
276 SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
277 },
278 {
279 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
280 "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
281 },
282 {
283 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
284 "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
285 },
286 {
287 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
288 "Python*", "*"}, SA_QUIRK_NODREAD, 0
289 },
290 {
291 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
292 "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
293 },
294 {
295 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
296 "VIPER 2525 25462", "-011"},
297 SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
298 },
299 {
300 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
301 "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
302 },
303 #if 0
304 {
305 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
306 "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
307 },
308 #endif
309 {
310 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
311 "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
312 },
313 {
314 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
315 "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
316 },
317 {
318 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
319 "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
320 },
321 {
322 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
323 "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
324 },
325 {
326 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
327 "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
328 },
329 {
330 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
331 "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
332 },
333 { /* jreynold@primenet.com */
334 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
335 "STT8000N*", "*"}, SA_QUIRK_1FM, 0
336 },
337 { /* mike@sentex.net */
338 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
339 "STT20000*", "*"}, SA_QUIRK_1FM, 0
340 },
341 {
342 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
343 " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
344 },
345 {
346 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
347 " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
348 },
349 {
350 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
351 " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
352 },
353 {
354 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
355 " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
356 },
357 {
358 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
359 " SLR*", "*"}, SA_QUIRK_1FM, 0
360 },
361 {
362 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
363 "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
364 },
365 {
366 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
367 "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
368 }
369 };
370
371 static d_open_t saopen;
372 static d_close_t saclose;
373 static d_strategy_t sastrategy;
374 static d_ioctl_t saioctl;
375 static periph_init_t sainit;
376 static periph_ctor_t saregister;
377 static periph_oninv_t saoninvalidate;
378 static periph_dtor_t sacleanup;
379 static periph_start_t sastart;
380 static void saasync(void *callback_arg, u_int32_t code,
381 struct cam_path *path, void *arg);
382 static void sadone(struct cam_periph *periph,
383 union ccb *start_ccb);
384 static int saerror(union ccb *ccb, u_int32_t cam_flags,
385 u_int32_t sense_flags);
386 static int samarkswanted(struct cam_periph *);
387 static int sacheckeod(struct cam_periph *periph);
388 static int sagetparams(struct cam_periph *periph,
389 sa_params params_to_get,
390 u_int32_t *blocksize, u_int8_t *density,
391 u_int32_t *numblocks, int *buff_mode,
392 u_int8_t *write_protect, u_int8_t *speed,
393 int *comp_supported, int *comp_enabled,
394 u_int32_t *comp_algorithm,
395 sa_comp_t *comp_page);
396 static int sasetparams(struct cam_periph *periph,
397 sa_params params_to_set,
398 u_int32_t blocksize, u_int8_t density,
399 u_int32_t comp_algorithm,
400 u_int32_t sense_flags);
401 static void saprevent(struct cam_periph *periph, int action);
402 static int sarewind(struct cam_periph *periph);
403 static int saspace(struct cam_periph *periph, int count,
404 scsi_space_code code);
405 static int samount(struct cam_periph *, int, cdev_t);
406 static int saretension(struct cam_periph *periph);
407 static int sareservereleaseunit(struct cam_periph *periph,
408 int reserve);
409 static int saloadunload(struct cam_periph *periph, int load);
410 static int saerase(struct cam_periph *periph, int longerase);
411 static int sawritefilemarks(struct cam_periph *periph,
412 int nmarks, int setmarks);
413 static int sardpos(struct cam_periph *periph, int, u_int32_t *);
414 static int sasetpos(struct cam_periph *periph, int, u_int32_t *);
415
416
417 static struct periph_driver sadriver =
418 {
419 sainit, "sa",
420 TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
421 };
422
423 PERIPHDRIVER_DECLARE(sa, sadriver);
424
425 /* For 2.2-stable support */
426 #ifndef D_TAPE
427 #define D_TAPE 0
428 #endif
429
430 #define SA_CDEV_MAJOR 14
431
432 static struct dev_ops sa_ops = {
433 { "sa", SA_CDEV_MAJOR, D_TAPE },
434 .d_open = saopen,
435 .d_close = saclose,
436 .d_read = physread,
437 .d_write = physwrite,
438 .d_ioctl = saioctl,
439 .d_strategy = sastrategy,
440 };
441
442 static struct extend_array *saperiphs;
443
444 static int
445 saopen(struct dev_open_args *ap)
446 {
447 cdev_t dev = ap->a_head.a_dev;
448 struct cam_periph *periph;
449 struct sa_softc *softc;
450 int unit;
451 int error;
452
453 unit = SAUNIT(dev);
454
455 crit_enter();
456 periph = cam_extend_get(saperiphs, unit);
457 if (periph == NULL) {
458 crit_exit();
459 return (ENXIO);
460 }
461 softc = (struct sa_softc *)periph->softc;
462 if ((error = cam_periph_lock(periph, PCATCH)) != 0) {
463 crit_exit();
464 return (error);
465 }
466 crit_exit();
467
468 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
469 ("saopen(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
470
471 if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
472 cam_periph_unlock(periph);
473 return (ENXIO);
474 }
475
476 if (SA_IS_CTRL(dev)) {
477 softc->ctrl_mode = 1;
478 cam_periph_unlock(periph);
479 return (0);
480 }
481
482 if (softc->flags & SA_FLAG_OPEN) {
483 error = EBUSY;
484 } else if (softc->flags & SA_FLAG_INVALID) {
485 error = ENXIO;
486 } else {
487 /*
488 * Preserve whether this is a read_only open.
489 */
490 softc->open_rdonly = (ap->a_oflags & O_RDWR) == O_RDONLY;
491
492 /*
493 * The function samount ensures media is loaded and ready.
494 * It also does a device RESERVE if the tape isn't yet mounted.
495 *
496 * If the mount fails and this was a non-blocking open,
497 * make this a 'open_pending_mount' action.
498 */
499 error = samount(periph, ap->a_oflags, dev);
500 if (error && (ap->a_oflags & O_NONBLOCK)) {
501 softc->flags |= SA_FLAG_OPEN;
502 softc->open_pending_mount = 1;
503 cam_periph_unlock(periph);
504 return (0);
505 }
506 }
507
508 if (error) {
509 cam_periph_release(periph);
510 } else {
511 saprevent(periph, PR_PREVENT);
512 softc->flags |= SA_FLAG_OPEN;
513 }
514 cam_periph_unlock(periph);
515 return (error);
516 }
517
518 static int
519 saclose(struct dev_close_args *ap)
520 {
521 cdev_t dev = ap->a_head.a_dev;
522 struct cam_periph *periph;
523 struct sa_softc *softc;
524 int unit, mode, error, writing, tmp;
525 int closedbits = SA_FLAG_OPEN;
526
527 unit = SAUNIT(dev);
528 mode = SAMODE(dev);
529 periph = cam_extend_get(saperiphs, unit);
530 if (periph == NULL)
531 return (ENXIO);
532
533 softc = (struct sa_softc *)periph->softc;
534
535 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
536 ("saclose(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
537
538
539 if ((error = cam_periph_lock(periph, 0)) != 0) {
540 return (error);
541 }
542
543 softc->open_rdonly = 0;
544 if (SA_IS_CTRL(dev)) {
545 softc->ctrl_mode = 0;
546 cam_periph_release(periph);
547 cam_periph_unlock(periph);
548 return (0);
549 }
550
551 if (softc->open_pending_mount) {
552 softc->flags &= ~SA_FLAG_OPEN;
553 softc->open_pending_mount = 0;
554 cam_periph_release(periph);
555 cam_periph_unlock(periph);
556 return (0);
557 }
558
559 /*
560 * Were we writing the tape?
561 */
562 writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
563
564 /*
565 * See whether or not we need to write filemarks. If this
566 * fails, we probably have to assume we've lost tape
567 * position.
568 */
569 error = sacheckeod(periph);
570 if (error) {
571 xpt_print_path(periph->path);
572 kprintf("failed to write terminating filemark(s)\n");
573 softc->flags |= SA_FLAG_TAPE_FROZEN;
574 }
575
576 /*
577 * Whatever we end up doing, allow users to eject tapes from here on.
578 */
579 saprevent(periph, PR_ALLOW);
580
581 /*
582 * Decide how to end...
583 */
584 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
585 closedbits |= SA_FLAG_TAPE_FROZEN;
586 } else switch (mode) {
587 case SA_MODE_OFFLINE:
588 /*
589 * An 'offline' close is an unconditional release of
590 * frozen && mount conditions, irrespective of whether
591 * these operations succeeded. The reason for this is
592 * to allow at least some kind of programmatic way
593 * around our state getting all fouled up. If somebody
594 * issues an 'offline' command, that will be allowed
595 * to clear state.
596 */
597 sarewind(periph);
598 saloadunload(periph, FALSE);
599 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
600 break;
601 case SA_MODE_REWIND:
602 /*
603 * If the rewind fails, return an error- if anyone cares,
604 * but not overwriting any previous error.
605 *
606 * We don't clear the notion of mounted here, but we do
607 * clear the notion of frozen if we successfully rewound.
608 */
609 tmp = sarewind(periph);
610 if (tmp) {
611 if (error != 0)
612 error = tmp;
613 } else {
614 closedbits |= SA_FLAG_TAPE_FROZEN;
615 }
616 break;
617 case SA_MODE_NOREWIND:
618 /*
619 * If we're not rewinding/unloading the tape, find out
620 * whether we need to back up over one of two filemarks
621 * we wrote (if we wrote two filemarks) so that appends
622 * from this point on will be sane.
623 */
624 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
625 tmp = saspace(periph, -1, SS_FILEMARKS);
626 if (tmp) {
627 xpt_print_path(periph->path);
628 kprintf("unable to backspace over one of double"
629 " filemarks at end of tape\n");
630 xpt_print_path(periph->path);
631 kprintf("it is possible that this device"
632 " needs a SA_QUIRK_1FM quirk set for it\n");
633 softc->flags |= SA_FLAG_TAPE_FROZEN;
634 }
635 }
636 break;
637 default:
638 xpt_print_path(periph->path);
639 panic("unknown mode 0x%x in saclose", mode);
640 /* NOTREACHED */
641 break;
642 }
643
644 /*
645 * We wish to note here that there are no more filemarks to be written.
646 */
647 softc->filemarks = 0;
648 softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
649
650 /*
651 * And we are no longer open for business.
652 */
653 softc->flags &= ~closedbits;
654
655 /*
656 * Inform users if tape state if frozen....
657 */
658 if (softc->flags & SA_FLAG_TAPE_FROZEN) {
659 xpt_print_path(periph->path);
660 kprintf("tape is now frozen- use an OFFLINE, REWIND or MTEOM "
661 "command to clear this state.\n");
662 }
663
664 /* release the device if it is no longer mounted */
665 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
666 sareservereleaseunit(periph, FALSE);
667
668 cam_periph_unlock(periph);
669 cam_periph_release(periph);
670
671 return (error);
672 }
673
674 /*
675 * Actually translate the requested transfer into one the physical driver
676 * can understand. The transfer is described by a buf and will include
677 * only one physical transfer.
678 */
679 static int
680 sastrategy(struct dev_strategy_args *ap)
681 {
682 cdev_t dev = ap->a_head.a_dev;
683 struct bio *bio = ap->a_bio;
684 struct buf *bp = bio->bio_buf;
685 struct cam_periph *periph;
686 struct sa_softc *softc;
687 u_int unit;
688
689 if (SA_IS_CTRL(dev)) {
690 bp->b_error = EINVAL;
691 goto bad;
692 }
693 unit = SAUNIT(dev);
694 periph = cam_extend_get(saperiphs, unit);
695 if (periph == NULL) {
696 bp->b_error = ENXIO;
697 goto bad;
698 }
699 softc = (struct sa_softc *)periph->softc;
700
701 crit_enter();
702
703 if (softc->flags & SA_FLAG_INVALID) {
704 crit_exit();
705 bp->b_error = ENXIO;
706 goto bad;
707 }
708
709 if (softc->flags & SA_FLAG_TAPE_FROZEN) {
710 crit_exit();
711 bp->b_error = EPERM;
712 goto bad;
713 }
714
715 /*
716 * This should actually never occur as the write(2)
717 * system call traps attempts to write to a read-only
718 * file descriptor.
719 */
720 if (bp->b_cmd == BUF_CMD_WRITE && softc->open_rdonly) {
721 crit_exit();
722 bp->b_error = EBADF;
723 goto bad;
724 }
725
726 crit_exit();
727
728 if (softc->open_pending_mount) {
729 int error = samount(periph, 0, dev);
730 if (error) {
731 bp->b_error = ENXIO;
732 goto bad;
733 }
734 saprevent(periph, PR_PREVENT);
735 softc->open_pending_mount = 0;
736 }
737
738 /*
739 * If it's a null transfer, return immediately
740 */
741 if (bp->b_bcount == 0)
742 goto done;
743
744 /* valid request? */
745 if (softc->flags & SA_FLAG_FIXED) {
746 /*
747 * Fixed block device. The byte count must
748 * be a multiple of our block size.
749 */
750 if (((softc->blk_mask != ~0) &&
751 ((bp->b_bcount & softc->blk_mask) != 0)) ||
752 ((softc->blk_mask == ~0) &&
753 ((bp->b_bcount % softc->min_blk) != 0))) {
754 xpt_print_path(periph->path);
755 kprintf("Invalid request. Fixed block device "
756 "requests must be a multiple "
757 "of %d bytes\n", softc->media_blksize);
758 bp->b_error = EINVAL;
759 goto bad;
760 }
761 } else if ((bp->b_bcount > softc->max_blk) ||
762 (bp->b_bcount < softc->min_blk) ||
763 (bp->b_bcount & softc->blk_mask) != 0) {
764
765 xpt_print_path(periph->path);
766 kprintf("Invalid request. Variable block device "
767 "requests must be ");
768 if (softc->blk_mask != 0) {
769 kprintf("a multiple of %d ", (0x1 << softc->blk_gran));
770 }
771 kprintf("between %d and %d bytes\n", softc->min_blk,
772 softc->max_blk);
773 bp->b_error = EINVAL;
774 goto bad;
775 }
776
777 /*
778 * Mask interrupts so that the device cannot be invalidated until
779 * after we are in the queue. Otherwise, we might not properly
780 * clean up one of the buffers.
781 */
782 crit_enter();
783
784 /*
785 * Place it at the end of the queue.
786 */
787 bioq_insert_tail(&softc->bio_queue, bio);
788 softc->queue_count++;
789 #if 0
790 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
791 ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount,
792 (softc->flags & SA_FLAG_FIXED)? "fixed" : "variable",
793 (bp->bio_cmd == BIO_READ)? "read" : "write"));
794 #endif
795 if (softc->queue_count > 1) {
796 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
797 ("sastrategy: queue count now %d\n", softc->queue_count));
798 }
799 crit_exit();
800
801 /*
802 * Schedule ourselves for performing the work.
803 */
804 xpt_schedule(periph, 1);
805
806 return(0);
807 bad:
808 bp->b_flags |= B_ERROR;
809 done:
810
811 /*
812 * Correctly set the buf to indicate a completed xfer
813 */
814 bp->b_resid = bp->b_bcount;
815 biodone(bio);
816 return(0);
817 }
818
819
820 #define PENDING_MOUNT_CHECK(softc, periph, dev) \
821 if (softc->open_pending_mount) { \
822 error = samount(periph, 0, dev); \
823 if (error) { \
824 break; \
825 } \
826 saprevent(periph, PR_PREVENT); \
827 softc->open_pending_mount = 0; \
828 }
829
830 static int
831 saioctl(struct dev_ioctl_args *ap)
832 {
833 cdev_t dev = ap->a_head.a_dev;
834 caddr_t addr = ap->a_data;
835 struct cam_periph *periph;
836 struct sa_softc *softc;
837 scsi_space_code spaceop;
838 int didlockperiph = 0;
839 int unit;
840 int mode;
841 int error = 0;
842
843 unit = SAUNIT(dev);
844 mode = SAMODE(dev);
845 error = 0; /* shut up gcc */
846 spaceop = 0; /* shut up gcc */
847
848 periph = cam_extend_get(saperiphs, unit);
849 if (periph == NULL)
850 return (ENXIO);
851
852 softc = (struct sa_softc *)periph->softc;
853
854 /*
855 * Check for control mode accesses. We allow MTIOCGET and
856 * MTIOCERRSTAT (but need to be the only one open in order
857 * to clear latched status), and MTSETBSIZE, MTSETDNSTY
858 * and MTCOMP (but need to be the only one accessing this
859 * device to run those).
860 */
861
862 if (SA_IS_CTRL(dev)) {
863 switch (ap->a_cmd) {
864 case MTIOCGETEOTMODEL:
865 case MTIOCGET:
866 break;
867 case MTIOCERRSTAT:
868 /*
869 * If the periph isn't already locked, lock it
870 * so our MTIOCERRSTAT can reset latched error stats.
871 *
872 * If the periph is already locked, skip it because
873 * we're just getting status and it'll be up to the
874 * other thread that has this device open to do
875 * an MTIOCERRSTAT that would clear latched status.
876 */
877 crit_enter();
878 if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
879 error = cam_periph_lock(periph, PCATCH);
880 if (error != 0) {
881 crit_exit();
882 return (error);
883 }
884 didlockperiph = 1;
885 }
886 crit_exit();
887 break;
888
889 case MTIOCTOP:
890 {
891 struct mtop *mt = (struct mtop *) addr;
892
893 /*
894 * Check to make sure it's an OP we can perform
895 * with no media inserted.
896 */
897 switch (mt->mt_op) {
898 case MTSETBSIZ:
899 case MTSETDNSTY:
900 case MTCOMP:
901 mt = NULL;
902 /* FALLTHROUGH */
903 default:
904 break;
905 }
906 if (mt != NULL) {
907 break;
908 }
909 /* FALLTHROUGH */
910 }
911 case MTIOCSETEOTMODEL:
912 /*
913 * We need to acquire the peripheral here rather
914 * than at open time because we are sharing writable
915 * access to data structures.
916 */
917 crit_enter();
918 error = cam_periph_lock(periph, PCATCH);
919 if (error != 0) {
920 crit_exit();
921 return (error);
922 }
923 didlockperiph = 1;
924 crit_exit();
925 break;
926
927 default:
928 return (EINVAL);
929 }
930 }
931
932 /*
933 * Find the device that the user is talking about
934 */
935 switch (ap->a_cmd) {
936 case MTIOCGET:
937 {
938 struct mtget *g = (struct mtget *)addr;
939
940 /*
941 * If this isn't the control mode device, actually go out
942 * and ask the drive again what it's set to.
943 */
944 if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) {
945 u_int8_t write_protect;
946 int comp_enabled, comp_supported;
947 error = sagetparams(periph, SA_PARAM_ALL,
948 &softc->media_blksize, &softc->media_density,
949 &softc->media_numblks, &softc->buffer_mode,
950 &write_protect, &softc->speed, &comp_supported,
951 &comp_enabled, &softc->comp_algorithm, NULL);
952 if (error)
953 break;
954 if (write_protect)
955 softc->flags |= SA_FLAG_TAPE_WP;
956 else
957 softc->flags &= ~SA_FLAG_TAPE_WP;
958 softc->flags &= ~(SA_FLAG_COMP_SUPP|
959 SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP);
960 if (comp_supported) {
961 if (softc->saved_comp_algorithm == 0)
962 softc->saved_comp_algorithm =
963 softc->comp_algorithm;
964 softc->flags |= SA_FLAG_COMP_SUPP;
965 if (comp_enabled)
966 softc->flags |= SA_FLAG_COMP_ENABLED;
967 } else
968 softc->flags |= SA_FLAG_COMP_UNSUPP;
969 }
970 bzero(g, sizeof(struct mtget));
971 g->mt_type = MT_ISAR;
972 if (softc->flags & SA_FLAG_COMP_UNSUPP) {
973 g->mt_comp = MT_COMP_UNSUPP;
974 g->mt_comp0 = MT_COMP_UNSUPP;
975 g->mt_comp1 = MT_COMP_UNSUPP;
976 g->mt_comp2 = MT_COMP_UNSUPP;
977 g->mt_comp3 = MT_COMP_UNSUPP;
978 } else {
979 if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
980 g->mt_comp = MT_COMP_DISABLED;
981 } else {
982 g->mt_comp = softc->comp_algorithm;
983 }
984 g->mt_comp0 = softc->comp_algorithm;
985 g->mt_comp1 = softc->comp_algorithm;
986 g->mt_comp2 = softc->comp_algorithm;
987 g->mt_comp3 = softc->comp_algorithm;
988 }
989 g->mt_density = softc->media_density;
990 g->mt_density0 = softc->media_density;
991 g->mt_density1 = softc->media_density;
992 g->mt_density2 = softc->media_density;
993 g->mt_density3 = softc->media_density;
994 g->mt_blksiz = softc->media_blksize;
995 g->mt_blksiz0 = softc->media_blksize;
996 g->mt_blksiz1 = softc->media_blksize;
997 g->mt_blksiz2 = softc->media_blksize;
998 g->mt_blksiz3 = softc->media_blksize;
999 g->mt_fileno = softc->fileno;
1000 g->mt_blkno = softc->blkno;
1001 g->mt_dsreg = (short) softc->dsreg;
1002 /*
1003 * Yes, we know that this is likely to overflow
1004 */
1005 if (softc->last_resid_was_io) {
1006 if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
1007 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
1008 softc->last_io_resid = 0;
1009 }
1010 }
1011 } else {
1012 if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
1013 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
1014 softc->last_ctl_resid = 0;
1015 }
1016 }
1017 }
1018 error = 0;
1019 break;
1020 }
1021 case MTIOCERRSTAT:
1022 {
1023 struct scsi_tape_errors *sep =
1024 &((union mterrstat *)addr)->scsi_errstat;
1025
1026 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1027 ("saioctl: MTIOCERRSTAT\n"));
1028
1029 bzero(sep, sizeof(*sep));
1030 sep->io_resid = softc->last_io_resid;
1031 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
1032 sizeof (sep->io_sense));
1033 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
1034 sizeof (sep->io_cdb));
1035 sep->ctl_resid = softc->last_ctl_resid;
1036 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
1037 sizeof (sep->ctl_sense));
1038 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
1039 sizeof (sep->ctl_cdb));
1040
1041 if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) ||
1042 didlockperiph)
1043 bzero((caddr_t) &softc->errinfo,
1044 sizeof (softc->errinfo));
1045 error = 0;
1046 break;
1047 }
1048 case MTIOCTOP:
1049 {
1050 struct mtop *mt;
1051 int count;
1052
1053 PENDING_MOUNT_CHECK(softc, periph, dev);
1054
1055 mt = (struct mtop *)addr;
1056
1057 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1058 ("saioctl: op=0x%x count=0x%x\n",
1059 mt->mt_op, mt->mt_count));
1060
1061 count = mt->mt_count;
1062 switch (mt->mt_op) {
1063 case MTWEOF: /* write an end-of-file marker */
1064 /*
1065 * We don't need to clear the SA_FLAG_TAPE_WRITTEN
1066 * flag because by keeping track of filemarks
1067 * we have last written we know ehether or not
1068 * we need to write more when we close the device.
1069 */
1070 error = sawritefilemarks(periph, count, FALSE);
1071 break;
1072 case MTWSS: /* write a setmark */
1073 error = sawritefilemarks(periph, count, TRUE);
1074 break;
1075 case MTBSR: /* backward space record */
1076 case MTFSR: /* forward space record */
1077 case MTBSF: /* backward space file */
1078 case MTFSF: /* forward space file */
1079 case MTBSS: /* backward space setmark */
1080 case MTFSS: /* forward space setmark */
1081 case MTEOD: /* space to end of recorded medium */
1082 {
1083 int nmarks;
1084
1085 spaceop = SS_FILEMARKS;
1086 nmarks = softc->filemarks;
1087 error = sacheckeod(periph);
1088 if (error) {
1089 xpt_print_path(periph->path);
1090 kprintf("EOD check prior to spacing failed\n");
1091 softc->flags |= SA_FLAG_EIO_PENDING;
1092 break;
1093 }
1094 nmarks -= softc->filemarks;
1095 switch(mt->mt_op) {
1096 case MTBSR:
1097 count = -count;
1098 /* FALLTHROUGH */
1099 case MTFSR:
1100 spaceop = SS_BLOCKS;
1101 break;
1102 case MTBSF:
1103 count = -count;
1104 /* FALLTHROUGH */
1105 case MTFSF:
1106 break;
1107 case MTBSS:
1108 count = -count;
1109 /* FALLTHROUGH */
1110 case MTFSS:
1111 spaceop = SS_SETMARKS;
1112 break;
1113 case MTEOD:
1114 spaceop = SS_EOD;
1115 count = 0;
1116 nmarks = 0;
1117 break;
1118 default:
1119 error = EINVAL;
1120 break;
1121 }
1122 if (error)
1123 break;
1124
1125 nmarks = softc->filemarks;
1126 /*
1127 * XXX: Why are we checking again?
1128 */
1129 error = sacheckeod(periph);
1130 if (error)
1131 break;
1132 nmarks -= softc->filemarks;
1133 error = saspace(periph, count - nmarks, spaceop);
1134 /*
1135 * At this point, clear that we've written the tape
1136 * and that we've written any filemarks. We really
1137 * don't know what the applications wishes to do next-
1138 * the sacheckeod's will make sure we terminated the
1139 * tape correctly if we'd been writing, but the next
1140 * action the user application takes will set again
1141 * whether we need to write filemarks.
1142 */
1143 softc->flags &=
1144 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1145 softc->filemarks = 0;
1146 break;
1147 }
1148 case MTREW: /* rewind */
1149 PENDING_MOUNT_CHECK(softc, periph, dev);
1150 sacheckeod(periph);
1151 error = sarewind(periph);
1152 /* see above */
1153 softc->flags &=
1154 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1155 softc->flags &= ~SA_FLAG_ERR_PENDING;
1156 softc->filemarks = 0;
1157 break;
1158 case MTERASE: /* erase */
1159 PENDING_MOUNT_CHECK(softc, periph, dev);
1160 error = saerase(periph, count);
1161 softc->flags &=
1162 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1163 softc->flags &= ~SA_FLAG_ERR_PENDING;
1164 break;
1165 case MTRETENS: /* re-tension tape */
1166 PENDING_MOUNT_CHECK(softc, periph, dev);
1167 error = saretension(periph);
1168 softc->flags &=
1169 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1170 softc->flags &= ~SA_FLAG_ERR_PENDING;
1171 break;
1172 case MTOFFL: /* rewind and put the drive offline */
1173
1174 PENDING_MOUNT_CHECK(softc, periph, dev);
1175
1176 sacheckeod(periph);
1177 /* see above */
1178 softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
1179 softc->filemarks = 0;
1180
1181 error = sarewind(periph);
1182 /* clear the frozen flag anyway */
1183 softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1184
1185 /*
1186 * Be sure to allow media removal before ejecting.
1187 */
1188
1189 saprevent(periph, PR_ALLOW);
1190 if (error == 0) {
1191 error = saloadunload(periph, FALSE);
1192 if (error == 0) {
1193 softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1194 }
1195 }
1196 break;
1197
1198 case MTNOP: /* no operation, sets status only */
1199 case MTCACHE: /* enable controller cache */
1200 case MTNOCACHE: /* disable controller cache */
1201 error = 0;
1202 break;
1203
1204 case MTSETBSIZ: /* Set block size for device */
1205
1206 PENDING_MOUNT_CHECK(softc, periph, dev);
1207
1208 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
1209 0, 0, 0);
1210 if (error == 0) {
1211 softc->last_media_blksize =
1212 softc->media_blksize;
1213 softc->media_blksize = count;
1214 if (count) {
1215 softc->flags |= SA_FLAG_FIXED;
1216 if (powerof2(count)) {
1217 softc->blk_shift =
1218 ffs(count) - 1;
1219 softc->blk_mask = count - 1;
1220 } else {
1221 softc->blk_mask = ~0;
1222 softc->blk_shift = 0;
1223 }
1224 /*
1225 * Make the user's desire 'persistent'.
1226 */
1227 softc->quirks &= ~SA_QUIRK_VARIABLE;
1228 softc->quirks |= SA_QUIRK_FIXED;
1229 } else {
1230 softc->flags &= ~SA_FLAG_FIXED;
1231 if (softc->max_blk == 0) {
1232 softc->max_blk = ~0;
1233 }
1234 softc->blk_shift = 0;
1235 if (softc->blk_gran != 0) {
1236 softc->blk_mask =
1237 softc->blk_gran - 1;
1238 } else {
1239 softc->blk_mask = 0;
1240 }
1241 /*
1242 * Make the user's desire 'persistent'.
1243 */
1244 softc->quirks |= SA_QUIRK_VARIABLE;
1245 softc->quirks &= ~SA_QUIRK_FIXED;
1246 }
1247 }
1248 break;
1249 case MTSETDNSTY: /* Set density for device and mode */
1250 PENDING_MOUNT_CHECK(softc, periph, dev);
1251
1252 if (count > UCHAR_MAX) {
1253 error = EINVAL;
1254 break;
1255 } else {
1256 error = sasetparams(periph, SA_PARAM_DENSITY,
1257 0, count, 0, 0);
1258 }
1259 break;
1260 case MTCOMP: /* enable compression */
1261 PENDING_MOUNT_CHECK(softc, periph, dev);
1262 /*
1263 * Some devices don't support compression, and
1264 * don't like it if you ask them for the
1265 * compression page.
1266 */
1267 if ((softc->quirks & SA_QUIRK_NOCOMP) ||
1268 (softc->flags & SA_FLAG_COMP_UNSUPP)) {
1269 error = ENODEV;
1270 break;
1271 }
1272 error = sasetparams(periph, SA_PARAM_COMPRESSION,
1273 0, 0, count, SF_NO_PRINT);
1274 break;
1275 default:
1276 error = EINVAL;
1277 }
1278 break;
1279 }
1280 case MTIOCIEOT:
1281 case MTIOCEEOT:
1282 error = 0;
1283 break;
1284 case MTIOCRDSPOS:
1285 PENDING_MOUNT_CHECK(softc, periph, dev);
1286 error = sardpos(periph, 0, (u_int32_t *) addr);
1287 break;
1288 case MTIOCRDHPOS:
1289 PENDING_MOUNT_CHECK(softc, periph, dev);
1290 error = sardpos(periph, 1, (u_int32_t *) addr);
1291 break;
1292 case MTIOCSLOCATE:
1293 PENDING_MOUNT_CHECK(softc, periph, dev);
1294 error = sasetpos(periph, 0, (u_int32_t *) addr);
1295 break;
1296 case MTIOCHLOCATE:
1297 PENDING_MOUNT_CHECK(softc, periph, dev);
1298 error = sasetpos(periph, 1, (u_int32_t *) addr);
1299 break;
1300 case MTIOCGETEOTMODEL:
1301 error = 0;
1302 if (softc->quirks & SA_QUIRK_1FM)
1303 mode = 1;
1304 else
1305 mode = 2;
1306 *((u_int32_t *) addr) = mode;
1307 break;
1308 case MTIOCSETEOTMODEL:
1309 error = 0;
1310 switch (*((u_int32_t *) addr)) {
1311 case 1:
1312 softc->quirks &= ~SA_QUIRK_2FM;
1313 softc->quirks |= SA_QUIRK_1FM;
1314 break;
1315 case 2:
1316 softc->quirks &= ~SA_QUIRK_1FM;
1317 softc->quirks |= SA_QUIRK_2FM;
1318 break;
1319 default:
1320 error = EINVAL;
1321 break;
1322 }
1323 break;
1324 default:
1325 error = cam_periph_ioctl(periph, ap->a_cmd, addr, saerror);
1326 break;
1327 }
1328
1329 /*
1330 * Check to see if we cleared a frozen state
1331 */
1332 if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
1333 switch(ap->a_cmd) {
1334 case MTIOCRDSPOS:
1335 case MTIOCRDHPOS:
1336 case MTIOCSLOCATE:
1337 case MTIOCHLOCATE:
1338 softc->fileno = (daddr_t) -1;
1339 softc->blkno = (daddr_t) -1;
1340 softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1341 xpt_print_path(periph->path);
1342 kprintf("tape state now unfrozen.\n");
1343 break;
1344 default:
1345 break;
1346 }
1347 }
1348 if (didlockperiph) {
1349 cam_periph_unlock(periph);
1350 }
1351 return (error);
1352 }
1353
1354 static void
1355 sainit(void)
1356 {
1357 cam_status status;
1358 struct cam_path *path;
1359
1360 /*
1361 * Create our extend array for storing the devices we attach to.
1362 */
1363 saperiphs = cam_extend_new();
1364 if (saperiphs == NULL) {
1365 kprintf("sa: Failed to alloc extend array!\n");
1366 return;
1367 }
1368
1369 /*
1370 * Install a global async callback.
1371 */
1372 status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1373 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
1374
1375 if (status == CAM_REQ_CMP) {
1376 /* Register the async callbacks of interrest */
1377 struct ccb_setasync csa; /*
1378 * This is an immediate CCB,
1379 * so using the stack is OK
1380 */
1381 xpt_setup_ccb(&csa.ccb_h, path, 5);
1382 csa.ccb_h.func_code = XPT_SASYNC_CB;
1383 csa.event_enable = AC_FOUND_DEVICE;
1384 csa.callback = saasync;
1385 csa.callback_arg = NULL;
1386 xpt_action((union ccb *)&csa);
1387 status = csa.ccb_h.status;
1388 xpt_free_path(path);
1389 }
1390
1391 if (status != CAM_REQ_CMP) {
1392 kprintf("sa: Failed to attach master async callback "
1393 "due to status 0x%x!\n", status);
1394 }
1395 }
1396
1397 static void
1398 saoninvalidate(struct cam_periph *periph)
1399 {
1400 struct sa_softc *softc;
1401 struct buf *q_bp;
1402 struct bio *q_bio;
1403 struct ccb_setasync csa;
1404
1405 softc = (struct sa_softc *)periph->softc;
1406
1407 /*
1408 * De-register any async callbacks.
1409 */
1410 xpt_setup_ccb(&csa.ccb_h, periph->path,
1411 /* priority */ 5);
1412 csa.ccb_h.func_code = XPT_SASYNC_CB;
1413 csa.event_enable = 0;
1414 csa.callback = saasync;
1415 csa.callback_arg = periph;
1416 xpt_action((union ccb *)&csa);
1417
1418 softc->flags |= SA_FLAG_INVALID;
1419
1420 /*
1421 * We need to be in a critical section here to keep the buffer
1422 * queue from being modified while we traverse it.
1423 */
1424 crit_enter();
1425
1426 /*
1427 * Return all queued I/O with ENXIO.
1428 * XXX Handle any transactions queued to the card
1429 * with XPT_ABORT_CCB.
1430 */
1431 while ((q_bio = bioq_first(&softc->bio_queue)) != NULL){
1432 bioq_remove(&softc->bio_queue, q_bio);
1433 q_bp = q_bio->bio_buf;
1434 q_bp->b_resid = q_bp->b_bcount;
1435 q_bp->b_error = ENXIO;
1436 q_bp->b_flags |= B_ERROR;
1437 biodone(q_bio);
1438 }
1439 softc->queue_count = 0;
1440 crit_exit();
1441
1442 xpt_print_path(periph->path);
1443 kprintf("lost device\n");
1444
1445 }
1446
1447 static void
1448 sacleanup(struct cam_periph *periph)
1449 {
1450 struct sa_softc *softc;
1451
1452 softc = (struct sa_softc *)periph->softc;
1453
1454 devstat_remove_entry(&softc->device_stats);
1455
1456 cam_extend_release(saperiphs, periph->unit_number);
1457 xpt_print_path(periph->path);
1458 kprintf("removing device entry\n");
1459 dev_ops_remove(&sa_ops, SA_UNITMASK, SA_UNIT(periph->unit_number));
1460 kfree(softc, M_SCSISA);
1461 }
1462
1463 static void
1464 saasync(void *callback_arg, u_int32_t code,
1465 struct cam_path *path, void *arg)
1466 {
1467 struct cam_periph *periph;
1468
1469 periph = (struct cam_periph *)callback_arg;
1470 switch (code) {
1471 case AC_FOUND_DEVICE:
1472 {
1473 struct ccb_getdev *cgd;
1474 cam_status status;
1475
1476 cgd = (struct ccb_getdev *)arg;
1477 if (cgd == NULL)
1478 break;
1479
1480 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
1481 break;
1482
1483 /*
1484 * Allocate a peripheral instance for
1485 * this device and start the probe
1486 * process.
1487 */
1488 status = cam_periph_alloc(saregister, saoninvalidate,
1489 sacleanup, sastart,
1490 "sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
1491 saasync, AC_FOUND_DEVICE, cgd);
1492
1493 if (status != CAM_REQ_CMP
1494 && status != CAM_REQ_INPROG)
1495 kprintf("saasync: Unable to probe new device "
1496 "due to status 0x%x\n", status);
1497 break;
1498 }
1499 default:
1500 cam_periph_async(periph, code, path, arg);
1501 break;
1502 }
1503 }
1504
1505 static cam_status
1506 saregister(struct cam_periph *periph, void *arg)
1507 {
1508 struct sa_softc *softc;
1509 struct ccb_setasync csa;
1510 struct ccb_getdev *cgd;
1511 caddr_t match;
1512 int i;
1513
1514 cgd = (struct ccb_getdev *)arg;
1515 if (periph == NULL) {
1516 kprintf("saregister: periph was NULL!!\n");
1517 return (CAM_REQ_CMP_ERR);
1518 }
1519
1520 if (cgd == NULL) {
1521 kprintf("saregister: no getdev CCB, can't register device\n");
1522 return (CAM_REQ_CMP_ERR);
1523 }
1524
1525 softc = kmalloc(sizeof (*softc), M_SCSISA, M_INTWAIT | M_ZERO);
1526 softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
1527 softc->state = SA_STATE_NORMAL;
1528 softc->fileno = (daddr_t) -1;
1529 softc->blkno = (daddr_t) -1;
1530
1531 bioq_init(&softc->bio_queue);
1532 periph->softc = softc;
1533 cam_extend_set(saperiphs, periph->unit_number, periph);
1534
1535 /*
1536 * See if this device has any quirks.
1537 */
1538 match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1539 (caddr_t)sa_quirk_table,
1540 sizeof(sa_quirk_table)/sizeof(*sa_quirk_table),
1541 sizeof(*sa_quirk_table), scsi_inquiry_match);
1542
1543 if (match != NULL) {
1544 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
1545 softc->last_media_blksize =
1546 ((struct sa_quirk_entry *)match)->prefblk;
1547 #ifdef CAMDEBUG
1548 xpt_print_path(periph->path);
1549 kprintf("found quirk entry %d\n", (int)
1550 (((struct sa_quirk_entry *) match) - sa_quirk_table));
1551 #endif
1552 } else
1553 softc->quirks = SA_QUIRK_NONE;
1554
1555 /*
1556 * The SA driver supports a blocksize, but we don't know the
1557 * blocksize until we media is inserted. So, set a flag to
1558 * indicate that the blocksize is unavailable right now.
1559 */
1560 devstat_add_entry(&softc->device_stats, "sa", periph->unit_number, 0,
1561 DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
1562 DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE);
1563
1564 dev_ops_add(&sa_ops, SA_UNITMASK, SA_UNIT(periph->unit_number));
1565 make_dev(&sa_ops, SAMINOR(SA_CTLDEV,
1566 periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1567 0660, "%s%d.ctl", periph->periph_name, periph->unit_number);
1568
1569 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1570 periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1571 0660, "%s%d", periph->periph_name, periph->unit_number);
1572
1573 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1574 periph->unit_number, 0, SA_ATYPE_NR), UID_ROOT, GID_OPERATOR,
1575 0660, "n%s%d", periph->periph_name, periph->unit_number);
1576
1577 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1578 periph->unit_number, 0, SA_ATYPE_ER), UID_ROOT, GID_OPERATOR,
1579 0660, "e%s%d", periph->periph_name, periph->unit_number);
1580
1581 for (i = 0; i < SA_NUM_MODES; i++) {
1582
1583 make_dev(&sa_ops,
1584 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R),
1585 UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d",
1586 periph->periph_name, periph->unit_number, i);
1587
1588 make_dev(&sa_ops,
1589 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR),
1590 UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d",
1591 periph->periph_name, periph->unit_number, i);
1592
1593
1594 make_dev(&sa_ops,
1595 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER),
1596 UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d",
1597 periph->periph_name, periph->unit_number, i);
1598 }
1599
1600 /*
1601 * Add an async callback so that we get
1602 * notified if this device goes away.
1603 */
1604 xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5);
1605 csa.ccb_h.func_code = XPT_SASYNC_CB;
1606 csa.event_enable = AC_LOST_DEVICE;
1607 csa.callback = saasync;
1608 csa.callback_arg = periph;
1609 xpt_action((union ccb *)&csa);
1610
1611 xpt_announce_periph(periph, NULL);
1612
1613 return (CAM_REQ_CMP);
1614 }
1615
1616 static void
1617 sastart(struct cam_periph *periph, union ccb *start_ccb)
1618 {
1619 struct sa_softc *softc;
1620
1621 softc = (struct sa_softc *)periph->softc;
1622
1623 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
1624
1625
1626 switch (softc->state) {
1627 case SA_STATE_NORMAL:
1628 {
1629 /* Pull a buffer from the queue and get going on it */
1630 struct buf *bp;
1631 struct bio *bio;
1632
1633 /*
1634 * See if there is a buf with work for us to do..
1635 */
1636 crit_enter();
1637 bio = bioq_first(&softc->bio_queue);
1638 if (periph->immediate_priority <= periph->pinfo.priority) {
1639 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1640 ("queuing for immediate ccb\n"));
1641 Set_CCB_Type(start_ccb, SA_CCB_WAITING);
1642 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1643 periph_links.sle);
1644 periph->immediate_priority = CAM_PRIORITY_NONE;
1645 crit_exit();
1646 wakeup(&periph->ccb_list);
1647 } else if (bio == NULL) {
1648 crit_exit();
1649 xpt_release_ccb(start_ccb);
1650 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
1651 struct bio *done_bio;
1652 again:
1653 softc->queue_count--;
1654 bioq_remove(&softc->bio_queue, bio);
1655 bp = bio->bio_buf;
1656 bp->b_resid = bp->b_bcount;
1657 done_bio = bio;
1658 if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
1659 /*
1660 * We now just clear errors in this case
1661 * and let the residual be the notifier.
1662 */
1663 bp->b_error = 0;
1664 } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
1665 /*
1666 * This can only happen if we're reading
1667 * in fixed length mode. In this case,
1668 * we dump the rest of the list the
1669 * same way.
1670 */
1671 bp->b_error = 0;
1672 if (bioq_first(&softc->bio_queue) != NULL) {
1673 biodone(done_bio);
1674 goto again;
1675 }
1676 } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
1677 bp->b_error = EIO;
1678 bp->b_flags |= B_ERROR;
1679 }
1680 bio = bioq_first(&softc->bio_queue);
1681 /*
1682 * Only if we have no other buffers queued up
1683 * do we clear the pending error flag.
1684 */
1685 if (bio == NULL)
1686 softc->flags &= ~SA_FLAG_ERR_PENDING;
1687 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1688 ("sastart- ERR_PENDING now 0x%x, bio is %sNULL, "
1689 "%d more buffers queued up\n",
1690 (softc->flags & SA_FLAG_ERR_PENDING),
1691 (bio != NULL)? "not " : " ", softc->queue_count));
1692 crit_exit();
1693 xpt_release_ccb(start_ccb);
1694 biodone(done_bio);
1695 } else {
1696 u_int32_t length;
1697
1698 bioq_remove(&softc->bio_queue, bio);
1699 bp = bio->bio_buf;
1700 softc->queue_count--;
1701
1702 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1703 if (softc->blk_shift != 0) {
1704 length =
1705 bp->b_bcount >> softc->blk_shift;
1706 } else if (softc->media_blksize != 0) {
1707 length =
1708 bp->b_bcount / softc->media_blksize;
1709 } else {
1710 bp->b_error = EIO;
1711 xpt_print_path(periph->path);
1712 kprintf("zero blocksize for "
1713 "FIXED length writes?\n");
1714 crit_exit();
1715 biodone(bio);
1716 break;
1717 }
1718 #if 0
1719 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1720 ("issuing a %d fixed record %s\n",
1721 length, (bp->bio_cmd == BIO_READ)? "read" :
1722 "write"));
1723 #endif
1724 } else {
1725 length = bp->b_bcount;
1726 #if 0
1727 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1728 ("issuing a %d variable byte %s\n",
1729 length, (bp->bio_cmd == BIO_READ)? "read" :
1730 "write"));
1731 #endif
1732 }
1733 devstat_start_transaction(&softc->device_stats);
1734 /*
1735 * Some people have theorized that we should
1736 * suppress illegal length indication if we are
1737 * running in variable block mode so that we don't
1738 * have to request sense every time our requested
1739 * block size is larger than the written block.
1740 * The residual information from the ccb allows
1741 * us to identify this situation anyway. The only
1742 * problem with this is that we will not get
1743 * information about blocks that are larger than
1744 * our read buffer unless we set the block size
1745 * in the mode page to something other than 0.
1746 *
1747 * I believe that this is a non-issue. If user apps
1748 * don't adjust their read size to match our record
1749 * size, that's just life. Anyway, the typical usage
1750 * would be to issue, e.g., 64KB reads and occasionally
1751 * have to do deal with 512 byte or 1KB intermediate
1752 * records.
1753 */
1754 softc->dsreg = (bp->b_cmd == BUF_CMD_READ) ?
1755 MTIO_DSREG_RD : MTIO_DSREG_WR;
1756 scsi_sa_read_write(&start_ccb->csio, 0, sadone,
1757 MSG_SIMPLE_Q_TAG, (bp->b_cmd == BUF_CMD_READ) != 0,
1758 FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
1759 length, bp->b_data, bp->b_bcount, SSD_FULL_SIZE,
1760 IO_TIMEOUT);
1761 start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
1762 Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
1763 start_ccb->ccb_h.ccb_bio = bio;
1764 bio = bioq_first(&softc->bio_queue);
1765 crit_exit();
1766 xpt_action(start_ccb);
1767 }
1768
1769 if (bio != NULL) {
1770 /* Have more work to do, so ensure we stay scheduled */
1771 xpt_schedule(periph, 1);
1772 }
1773 break;
1774 }
1775 case SA_STATE_ABNORMAL:
1776 default:
1777 panic("state 0x%x in sastart", softc->state);
1778 break;
1779 }
1780 }
1781
1782
1783 static void
1784 sadone(struct cam_periph *periph, union ccb *done_ccb)
1785 {
1786 struct sa_softc *softc;
1787 struct ccb_scsiio *csio;
1788
1789 softc = (struct sa_softc *)periph->softc;
1790 csio = &done_ccb->csio;
1791 switch (CCB_Type(csio)) {
1792 case SA_CCB_BUFFER_IO:
1793 {
1794 struct buf *bp;
1795 struct bio *bio;
1796 int error;
1797
1798 softc->dsreg = MTIO_DSREG_REST;
1799 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
1800 bp = bio->bio_buf;
1801 error = 0;
1802 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1803 if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
1804 /*
1805 * A retry was scheduled, so just return.
1806 */
1807 return;
1808 }
1809 }
1810
1811 if (error == EIO) {
1812 struct buf *q_bp;
1813 struct bio *q_bio;
1814
1815 /*
1816 * Catastrophic error. Mark the tape as frozen
1817 * (we no longer know tape position).
1818 *
1819 * Return all queued I/O with EIO, and unfreeze
1820 * our queue so that future transactions that
1821 * attempt to fix this problem can get to the
1822 * device.
1823 *
1824 */
1825
1826 crit_enter();
1827 softc->flags |= SA_FLAG_TAPE_FROZEN;
1828 while ((q_bio = bioq_first(&softc->bio_queue)) != NULL) {
1829 bioq_remove(&softc->bio_queue, q_bio);
1830 q_bp = q_bio->bio_buf;
1831 q_bp->b_resid = q_bp->b_bcount;
1832 q_bp->b_error = EIO;
1833 q_bp->b_flags |= B_ERROR;
1834 biodone(q_bio);
1835 }
1836 crit_exit();
1837 }
1838 if (error != 0) {
1839 bp->b_resid = bp->b_bcount;
1840 bp->b_error = error;
1841 bp->b_flags |= B_ERROR;
1842 /*
1843 * In the error case, position is updated in saerror.
1844 */
1845 } else {
1846 bp->b_resid = csio->resid;
1847 bp->b_error = 0;
1848 if (csio->resid != 0) {
1849 bp->b_flags |= B_ERROR;
1850 }
1851 if (bp->b_cmd != BUF_CMD_READ) {
1852 softc->flags |= SA_FLAG_TAPE_WRITTEN;
1853 softc->filemarks = 0;
1854 }
1855 if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
1856 (softc->blkno != (daddr_t) -1)) {
1857 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1858 u_int32_t l;
1859 if (softc->blk_shift != 0) {
1860 l = bp->b_bcount >>
1861 softc->blk_shift;
1862 } else {
1863 l = bp->b_bcount /
1864 softc->media_blksize;
1865 }
1866 softc->blkno += (daddr_t) l;
1867 } else {
1868 softc->blkno++;
1869 }
1870 }
1871 }
1872 /*
1873 * If we had an error (immediate or pending),
1874 * release the device queue now.
1875 */
1876 if (error || (softc->flags & SA_FLAG_ERR_PENDING))
1877 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1878 #ifdef CAMDEBUG
1879 if (error || bp->b_resid) {
1880 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1881 ("error %d resid %d count %d\n", error,
1882 bp->b_resid, bp->b_bcount));
1883 }
1884 #endif
1885 devstat_end_transaction_buf(&softc->device_stats, bp);
1886 biodone(bio);
1887 break;
1888 }
1889 case SA_CCB_WAITING:
1890 {
1891 /* Caller will release the CCB */
1892 wakeup(&done_ccb->ccb_h.cbfcnp);
1893 return;
1894 }
1895 }
1896 xpt_release_ccb(done_ccb);
1897 }
1898
1899 /*
1900 * Mount the tape (make sure it's ready for I/O).
1901 */
1902 static int
1903 samount(struct cam_periph *periph, int oflags, cdev_t dev)
1904 {
1905 struct sa_softc *softc;
1906 union ccb *ccb;
1907 int error;
1908
1909 /*
1910 * oflags can be checked for 'kind' of open (read-only check) - later
1911 * dev can be checked for a control-mode or compression open - later
1912 */
1913 UNUSED_PARAMETER(oflags);
1914 UNUSED_PARAMETER(dev);
1915
1916
1917 softc = (struct sa_softc *)periph->softc;
1918
1919 /*
1920 * This should determine if something has happend since the last
1921 * open/mount that would invalidate the mount. We do *not* want
1922 * to retry this command- we just want the status. But we only
1923 * do this if we're mounted already- if we're not mounted,
1924 * we don't care about the unit read state and can instead use
1925 * this opportunity to attempt to reserve the tape unit.
1926 */
1927
1928 if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
1929 ccb = cam_periph_getccb(periph, 1);
1930 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1931 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1932 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1933 &softc->device_stats);
1934 QFRLS(ccb);
1935 if (error == ENXIO) {
1936 softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1937 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1938 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1939 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1940 &softc->device_stats);
1941 QFRLS(ccb);
1942 } else if (error) {
1943 /*
1944 * We don't need to freeze the tape because we
1945 * will now attempt to rewind/load it.
1946 */
1947 softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1948 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
1949 xpt_print_path(periph->path);
1950 kprintf("error %d on TUR in samount\n", error);
1951 }
1952 }
1953 } else {
1954 error = sareservereleaseunit(periph, TRUE);
1955 if (error) {
1956 return (error);
1957 }
1958 ccb = cam_periph_getccb(periph, 1);
1959 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1960 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1961 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1962 &softc->device_stats);
1963 QFRLS(ccb);
1964 }
1965
1966 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
1967 struct scsi_read_block_limits_data *rblim = NULL;
1968 int comp_enabled, comp_supported;
1969 u_int8_t write_protect, guessing = 0;
1970
1971 /*
1972 * Clear out old state.
1973 */
1974 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
1975 SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
1976 SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
1977 softc->filemarks = 0;
1978
1979 /*
1980 * *Very* first off, make sure we're loaded to BOT.
1981 */
1982 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
1983 FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
1984 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1985 &softc->device_stats);
1986 QFRLS(ccb);
1987
1988 /*
1989 * In case this doesn't work, do a REWIND instead
1990 */
1991 if (error) {
1992 scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
1993 FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1994 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1995 &softc->device_stats);
1996 QFRLS(ccb);
1997 }
1998 if (error) {
1999 xpt_release_ccb(ccb);
2000 goto exit;
2001 }
2002
2003 /*
2004 * Do a dummy test read to force access to the
2005 * media so that the drive will really know what's
2006 * there. We actually don't really care what the
2007 * blocksize on tape is and don't expect to really
2008 * read a full record.
2009 */
2010 rblim = kmalloc(8192, M_TEMP, M_INTWAIT);
2011
2012 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
2013 scsi_sa_read_write(&ccb->csio, 0, sadone,
2014 MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
2015 (void *) rblim, 8192, SSD_FULL_SIZE,
2016 IO_TIMEOUT);
2017 cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2018 &softc->device_stats);
2019 QFRLS(ccb);
2020 scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
2021 FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
2022 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
2023 SF_NO_PRINT | SF_RETRY_UA,
2024 &softc->device_stats);
2025 QFRLS(ccb);
2026 if (error) {
2027 xpt_print_path(periph->path);
2028 kprintf("unable to rewind after test read\n");
2029 xpt_release_ccb(ccb);
2030 goto exit;
2031 }
2032 }
2033
2034 /*
2035 * Next off, determine block limits.
2036 */
2037 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
2038 rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2039
2040 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
2041 SF_NO_PRINT | SF_RETRY_UA, &softc->device_stats);
2042
2043 QFRLS(ccb);
2044 xpt_release_ccb(ccb);
2045
2046 if (error != 0) {
2047 /*
2048 * If it's less than SCSI-2, READ BLOCK LIMITS is not
2049 * a MANDATORY command. Anyway- it doesn't matter-
2050 * we can proceed anyway.
2051 */
2052 softc->blk_gran = 0;
2053 softc->max_blk = ~0;
2054 softc->min_blk = 0;
2055 } else {
2056 if (softc->scsi_rev >= SCSI_REV_SPC) {
2057 softc->blk_gran = RBL_GRAN(rblim);
2058 } else {
2059 softc->blk_gran = 0;
2060 }
2061 /*
2062 * We take max_blk == min_blk to mean a default to
2063 * fixed mode- but note that whatever we get out of
2064 * sagetparams below will actually determine whether
2065 * we are actually *in* fixed mode.
2066 */
2067 softc->max_blk = scsi_3btoul(rblim->maximum);
2068 softc->min_blk = scsi_2btoul(rblim->minimum);
2069
2070
2071 }
2072 /*
2073 * Next, perform a mode sense to determine
2074 * current density, blocksize, compression etc.
2075 */
2076 error = sagetparams(periph, SA_PARAM_ALL,
2077 &softc->media_blksize,
2078 &softc->media_density,
2079 &softc->media_numblks,
2080 &softc->buffer_mode, &write_protect,
2081 &softc->speed, &comp_supported,
2082 &comp_enabled, &softc->comp_algorithm,
2083 NULL);
2084
2085 if (error != 0) {
2086 /*
2087 * We could work a little harder here. We could
2088 * adjust our attempts to get information. It
2089 * might be an ancient tape drive. If someone
2090 * nudges us, we'll do that.
2091 */
2092 goto exit;
2093 }
2094
2095 /*
2096 * If no quirk has determined that this is a device that is
2097 * preferred to be in fixed or variable mode, now is the time
2098 * to find out.
2099 */
2100 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
2101 guessing = 1;
2102 /*
2103 * This could be expensive to find out. Luckily we
2104 * only need to do this once. If we start out in
2105 * 'default' mode, try and set ourselves to one
2106 * of the densities that would determine a wad
2107 * of other stuff. Go from highest to lowest.
2108 */
2109 if (softc->media_density == SCSI_DEFAULT_DENSITY) {
2110 int i;
2111 static u_int8_t ctry[] = {
2112 SCSI_DENSITY_HALFINCH_PE,
2113 SCSI_DENSITY_HALFINCH_6250C,
2114 SCSI_DENSITY_HALFINCH_6250,
2115 SCSI_DENSITY_HALFINCH_1600,
2116 SCSI_DENSITY_HALFINCH_800,
2117 SCSI_DENSITY_QIC_4GB,
2118 SCSI_DENSITY_QIC_2GB,
2119 SCSI_DENSITY_QIC_525_320,
2120 SCSI_DENSITY_QIC_150,
2121 SCSI_DENSITY_QIC_120,
2122 SCSI_DENSITY_QIC_24,
2123 SCSI_DENSITY_QIC_11_9TRK,
2124 SCSI_DENSITY_QIC_11_4TRK,
2125 SCSI_DENSITY_QIC_1320,
2126 SCSI_DENSITY_QIC_3080,
2127 0
2128 };
2129 for (i = 0; ctry[i]; i++) {
2130 error = sasetparams(periph,
2131 SA_PARAM_DENSITY, 0, ctry[i],
2132 0, SF_NO_PRINT);
2133 if (error == 0) {
2134 softc->media_density = ctry[i];
2135 break;
2136 }
2137 }
2138 }
2139 switch (softc->media_density) {
2140 case SCSI_DENSITY_QIC_11_4TRK:
2141 case SCSI_DENSITY_QIC_11_9TRK:
2142 case SCSI_DENSITY_QIC_24:
2143 case SCSI_DENSITY_QIC_120:
2144 case SCSI_DENSITY_QIC_150:
2145 case SCSI_DENSITY_QIC_525_320:
2146 case SCSI_DENSITY_QIC_1320:
2147 case SCSI_DENSITY_QIC_3080:
2148 softc->quirks &= ~SA_QUIRK_2FM;
2149 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2150 softc->last_media_blksize = 512;
2151 break;
2152 case SCSI_DENSITY_QIC_4GB:
2153 case SCSI_DENSITY_QIC_2GB:
2154 softc->quirks &= ~SA_QUIRK_2FM;
2155 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2156 softc->last_media_blksize = 1024;
2157 break;
2158 default:
2159 softc->last_media_blksize =
2160 softc->media_blksize;
2161 softc->quirks |= SA_QUIRK_VARIABLE;
2162 break;
2163 }
2164 }
2165
2166 /*
2167 * If no quirk has determined that this is a device that needs
2168 * to have 2 Filemarks at EOD, now is the time to find out.
2169 */
2170
2171 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
2172 switch (softc->media_density) {
2173 case SCSI_DENSITY_HALFINCH_800:
2174 case SCSI_DENSITY_HALFINCH_1600:
2175 case SCSI_DENSITY_HALFINCH_6250:
2176 case SCSI_DENSITY_HALFINCH_6250C:
2177 case SCSI_DENSITY_HALFINCH_PE:
2178 softc->quirks &= ~SA_QUIRK_1FM;
2179 softc->quirks |= SA_QUIRK_2FM;
2180 break;
2181 default:
2182 break;
2183 }
2184 }
2185
2186 /*
2187 * Now validate that some info we got makes sense.
2188 */
2189 if ((softc->max_blk < softc->media_blksize) ||
2190 (softc->min_blk > softc->media_blksize &&
2191 softc->media_blksize)) {
2192 xpt_print_path(periph->path);
2193 kprintf("BLOCK LIMITS (%d..%d) could not match current "
2194 "block settings (%d)- adjusting\n", softc->min_blk,
2195 softc->max_blk, softc->media_blksize);
2196 softc->max_blk = softc->min_blk =
2197 softc->media_blksize;
2198 }
2199
2200 /*
2201 * Now put ourselves into the right frame of mind based
2202 * upon quirks...
2203 */
2204 tryagain:
2205 /*
2206 * If we want to be in FIXED mode and our current blocksize
2207 * is not equal to our last blocksize (if nonzero), try and
2208 * set ourselves to this last blocksize (as the 'preferred'
2209 * block size). The initial quirkmatch at registry sets the
2210 * initial 'last' blocksize. If, for whatever reason, this
2211 * 'last' blocksize is zero, set the blocksize to 512,
2212 * or min_blk if that's larger.
2213 */
2214 if ((softc->quirks & SA_QUIRK_FIXED) &&
2215 (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
2216 (softc->media_blksize != softc->last_media_blksize)) {
2217 softc->media_blksize = softc->last_media_blksize;
2218 if (softc->media_blksize == 0) {
2219 softc->media_blksize = 512;
2220 if (softc->media_blksize < softc->min_blk) {
2221 softc->media_blksize = softc->min_blk;
2222 }
2223 }
2224 error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2225 softc->media_blksize, 0, 0, SF_NO_PRINT);
2226 if (error) {
2227 xpt_print_path(periph->path);
2228 kprintf("unable to set fixed blocksize to %d\n",
2229 softc->media_blksize);
2230 goto exit;
2231 }
2232 }
2233
2234 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
2235 (softc->media_blksize != 0)) {
2236 softc->last_media_blksize = softc->media_blksize;
2237 softc->media_blksize = 0;
2238 error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2239 0, 0, 0, SF_NO_PRINT);
2240 if (error) {
2241 /*
2242 * If this fails and we were guessing, just
2243 * assume that we got it wrong and go try
2244 * fixed block mode. Don't even check against
2245 * density code at this point.
2246 */
2247 if (guessing) {
2248 softc->quirks &= ~SA_QUIRK_VARIABLE;
2249 softc->quirks |= SA_QUIRK_FIXED;
2250 if (softc->last_media_blksize == 0)
2251 softc->last_media_blksize = 512;
2252 goto tryagain;
2253 }
2254 xpt_print_path(periph->path);
2255 kprintf("unable to set variable blocksize\n");
2256 goto exit;
2257 }
2258 }
2259
2260 /*
2261 * Now that we have the current block size,
2262 * set up some parameters for sastart's usage.
2263 */
2264 if (softc->media_blksize) {
2265 softc->flags |= SA_FLAG_FIXED;
2266 if (powerof2(softc->media_blksize)) {
2267 softc->blk_shift =
2268 ffs(softc->media_blksize) - 1;
2269 softc->blk_mask = softc->media_blksize - 1;
2270 } else {
2271 softc->blk_mask = ~0;
2272 softc->blk_shift = 0;
2273 }
2274 } else {
2275 /*
2276 * The SCSI-3 spec allows 0 to mean "unspecified".
2277 * The SCSI-1 spec allows 0 to mean 'infinite'.
2278 *
2279 * Either works here.
2280 */
2281 if (softc->max_blk == 0) {
2282 softc->max_blk = ~0;
2283 }
2284 softc->blk_shift = 0;
2285 if (softc->blk_gran != 0) {
2286 softc->blk_mask = softc->blk_gran - 1;
2287 } else {
2288 softc->blk_mask = 0;
2289 }
2290 }
2291
2292 if (write_protect)
2293 softc->flags |= SA_FLAG_TAPE_WP;
2294
2295 if (comp_supported) {
2296 if (softc->saved_comp_algorithm == 0)
2297 softc->saved_comp_algorithm =
2298 softc->comp_algorithm;
2299 softc->flags |= SA_FLAG_COMP_SUPP;
2300 if (comp_enabled)
2301 softc->flags |= SA_FLAG_COMP_ENABLED;
2302 } else
2303 softc->flags |= SA_FLAG_COMP_UNSUPP;
2304
2305 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
2306 (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
2307 error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
2308 0, 0, SF_NO_PRINT);
2309 if (error == 0) {
2310 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
2311 } else {
2312 xpt_print_path(periph->path);
2313 kprintf("unable to set buffered mode\n");
2314 }
2315 error = 0; /* not an error */
2316 }
2317
2318
2319 if (error == 0) {
2320 softc->flags |= SA_FLAG_TAPE_MOUNTED;
2321 }
2322 exit:
2323 if (rblim != NULL)
2324 kfree(rblim, M_TEMP);
2325
2326 if (error != 0) {
2327 softc->dsreg = MTIO_DSREG_NIL;
2328 } else {
2329 softc->fileno = softc->blkno = 0;
2330 softc->dsreg = MTIO_DSREG_REST;
2331 }
2332 #ifdef SA_1FM_AT_EOD
2333 if ((softc->quirks & SA_QUIRK_2FM) == 0)
2334 softc->quirks |= SA_QUIRK_1FM;
2335 #else
2336 if ((softc->quirks & SA_QUIRK_1FM) == 0)
2337 softc->quirks |= SA_QUIRK_2FM;
2338 #endif
2339 } else
2340 xpt_release_ccb(ccb);
2341
2342 /*
2343 * If we return an error, we're not mounted any more,
2344 * so release any device reservation.
2345 */
2346 if (error != 0) {
2347 sareservereleaseunit(periph, FALSE);
2348 } else {
2349 /*
2350 * Clear I/O residual.
2351 */
2352 softc->last_io_resid = 0;
2353 softc->last_ctl_resid = 0;
2354 }
2355 return (error);
2356 }
2357
2358 /*
2359 * How many filemarks do we need to write if we were to terminate the
2360 * tape session right now? Note that this can be a negative number
2361 */
2362
2363 static int
2364 samarkswanted(struct cam_periph *periph)
2365 {
2366 int markswanted;
2367 struct sa_softc *softc;
2368
2369 softc = (struct sa_softc *)periph->softc;
2370 markswanted = 0;
2371 if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
2372 markswanted++;
2373 if (softc->quirks & SA_QUIRK_2FM)
2374 markswanted++;
2375 }
2376 markswanted -= softc->filemarks;
2377 return (markswanted);
2378 }
2379
2380 static int
2381 sacheckeod(struct cam_periph *periph)
2382 {
2383 int error;
2384 int markswanted;
2385
2386 markswanted = samarkswanted(periph);
2387
2388 if (markswanted > 0) {
2389 error = sawritefilemarks(periph, markswanted, FALSE);
2390 } else {
2391 error = 0;
2392 }
2393 return (error);
2394 }
2395
2396 static int
2397 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
2398 {
2399 static const char *toobig =
2400 "%d-byte tape record bigger than supplied buffer\n";
2401 struct cam_periph *periph;
2402 struct sa_softc *softc;
2403 struct ccb_scsiio *csio;
2404 struct scsi_sense_data *sense;
2405 u_int32_t resid = 0;
2406 int32_t info = 0;
2407 cam_status status;
2408 int error_code, sense_key, asc, ascq, error, aqvalid;
2409
2410 periph = xpt_path_periph(ccb->ccb_h.path);
2411 softc = (struct sa_softc *)periph->softc;
2412 csio = &ccb->csio;
2413 sense = &csio->sense_data;
2414 scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq);
2415 aqvalid = sense->extra_len >= 6;
2416 error = 0;
2417
2418 status = csio->ccb_h.status & CAM_STATUS_MASK;
2419
2420 /*
2421 * Calculate/latch up, any residuals... We do this in a funny 2-step
2422 * so we can print stuff here if we have CAM_DEBUG enabled for this
2423 * unit.
2424 */
2425 if (status == CAM_SCSI_STATUS_ERROR) {
2426 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
2427 info = (int32_t) scsi_4btoul(sense->info);
2428 resid = info;
2429 if ((softc->flags & SA_FLAG_FIXED) != 0)
2430 resid *= softc->media_blksize;
2431 } else {
2432 resid = csio->dxfer_len;
2433 info = resid;
2434 if ((softc->flags & SA_FLAG_FIXED) != 0) {
2435 if (softc->media_blksize)
2436 info /= softc->media_blksize;
2437 }
2438 }
2439 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
2440 bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
2441 sizeof (struct scsi_sense_data));
2442 bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
2443 (int) csio->cdb_len);
2444 softc->last_io_resid = resid;
2445 softc->last_resid_was_io = 1;
2446 } else {
2447 bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
2448 sizeof (struct scsi_sense_data));
2449 bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
2450 (int) csio->cdb_len);
2451 softc->last_ctl_resid = resid;
2452 softc->last_resid_was_io = 0;
2453 }
2454 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
2455 "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d "
2456 "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
2457 sense_key, asc, ascq, status,
2458 sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len));
2459 } else {
2460 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2461 ("Cam Status 0x%x\n", status));
2462 }
2463
2464 switch (status) {
2465 case CAM_REQ_CMP:
2466 return (0);
2467 case CAM_SCSI_STATUS_ERROR:
2468 /*
2469 * If a read/write command, we handle it here.
2470 */
2471 if (CCB_Type(csio) != SA_CCB_WAITING) {
2472 break;
2473 }
2474 /*
2475 * If this was just EOM/EOP, Filemark, Setmark or ILI detected
2476 * on a non read/write command, we assume it's not an error
2477 * and propagate the residule and return.
2478 */
2479 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
2480 (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
2481 csio->resid = resid;
2482 QFRLS(ccb);
2483 return (0);
2484 }
2485 /*
2486 * Otherwise, we let the common code handle this.
2487 */
2488 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2489
2490 /*
2491 * XXX: To Be Fixed
2492 * We cannot depend upon CAM honoring retry counts for these.
2493 */
2494 case CAM_SCSI_BUS_RESET:
2495 case CAM_BDR_SENT:
2496 if (ccb->ccb_h.retry_count <= 0) {
2497 return (EIO);
2498 }
2499 /* FALLTHROUGH */
2500 default:
2501 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2502 }
2503
2504 /*
2505 * Handle filemark, end of tape, mismatched record sizes....
2506 * From this point out, we're only handling read/write cases.
2507 * Handle writes && reads differently.
2508 */
2509
2510 if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
2511 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
2512 csio->resid = resid;
2513 error = ENOSPC;
2514 } else if (sense->flags & SSD_EOM) {
2515 softc->flags |= SA_FLAG_EOM_PENDING;
2516 /*
2517 * Grotesque as it seems, the few times
2518 * I've actually seen a non-zero resid,
2519 * the tape drive actually lied and had
2520 * written all the data!.
2521 */
2522 csio->resid = 0;
2523 }
2524 } else {
2525 csio->resid = resid;
2526 if (sense_key == SSD_KEY_BLANK_CHECK) {
2527 if (softc->quirks & SA_QUIRK_1FM) {
2528 error = 0;
2529 softc->flags |= SA_FLAG_EOM_PENDING;
2530 } else {
2531 error = EIO;
2532 }
2533 } else if (sense->flags & SSD_FILEMARK) {
2534 if (softc->flags & SA_FLAG_FIXED) {
2535 error = -1;
2536 softc->flags |= SA_FLAG_EOF_PENDING;
2537 }
2538 /*
2539 * Unconditionally, if we detected a filemark on a read,
2540 * mark that we've run moved a file ahead.
2541 */
2542 if (softc->fileno != (daddr_t) -1) {
2543 softc->fileno++;
2544 softc->blkno = 0;
2545 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
2546 }
2547 }
2548 }
2549
2550 /*
2551 * Incorrect Length usually applies to read, but can apply to writes.
2552 */
2553 if (error == 0 && (sense->flags & SSD_ILI)) {
2554 if (info < 0) {
2555 xpt_print_path(csio->ccb_h.path);
2556 kprintf(toobig, csio->dxfer_len - info);
2557 csio->resid = csio->dxfer_len;
2558 error = EIO;
2559 } else {
2560 csio->resid = resid;
2561 if (softc->flags & SA_FLAG_FIXED) {
2562 softc->flags |= SA_FLAG_EIO_PENDING;
2563 }
2564 /*
2565 * Bump the block number if we hadn't seen a filemark.
2566 * Do this independent of errors (we've moved anyway).
2567 */
2568 if ((sense->flags & SSD_FILEMARK) == 0) {
2569 if (softc->blkno != (daddr_t) -1) {
2570 softc->blkno++;
2571 csio->ccb_h.ccb_pflags |=
2572 SA_POSITION_UPDATED;
2573 }
2574 }
2575 }
2576 }
2577
2578 if (error <= 0) {
2579 /*
2580 * Unfreeze the queue if frozen as we're not returning anything
2581 * to our waiters that would indicate an I/O error has occurred
2582 * (yet).
2583 */
2584 QFRLS(ccb);
2585 error = 0;
2586 }
2587 return (error);
2588 }
2589
2590 static int
2591 sagetparams(struct cam_periph *periph, sa_params params_to_get,
2592 u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
2593 int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
2594 int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
2595 sa_comp_t *tcs)
2596 {
2597 union ccb *ccb;
2598 void *mode_buffer;
2599 struct scsi_mode_header_6 *mode_hdr;
2600 struct scsi_mode_blk_desc *mode_blk;
2601 int mode_buffer_len;
2602 struct sa_softc *softc;
2603 u_int8_t cpage;
2604 int error;
2605 cam_status status;
2606
2607 softc = (struct sa_softc *)periph->softc;
2608 ccb = cam_periph_getccb(periph, 1);
2609 if (softc->quirks & SA_QUIRK_NO_CPAGE)
2610 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2611 else
2612 cpage = SA_DATA_COMPRESSION_PAGE;
2613
2614 retry:
2615 mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2616
2617 if (params_to_get & SA_PARAM_COMPRESSION) {
2618 if (softc->quirks & SA_QUIRK_NOCOMP) {
2619 *comp_supported = FALSE;
2620 params_to_get &= ~SA_PARAM_COMPRESSION;
2621 } else
2622 mode_buffer_len += sizeof (sa_comp_t);
2623 }
2624
2625 mode_buffer = kmalloc(mode_buffer_len, M_TEMP, M_INTWAIT | M_ZERO);
2626 mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2627 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2628
2629 /* it is safe to retry this */
2630 scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2631 SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
2632 cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
2633 SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2634
2635 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2636 &softc->device_stats);
2637 QFRLS(ccb);
2638
2639 status = ccb->ccb_h.status & CAM_STATUS_MASK;
2640
2641 if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
2642 /*
2643 * Hmm. Let's see if we can try another page...
2644 * If we've already done that, give up on compression
2645 * for this device and remember this for the future
2646 * and attempt the request without asking for compression
2647 * info.
2648 */
2649 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2650 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2651 goto retry;
2652 }
2653 softc->quirks |= SA_QUIRK_NOCOMP;
2654 kfree(mode_buffer, M_TEMP);
2655 goto retry;
2656 } else if (status == CAM_SCSI_STATUS_ERROR) {
2657 /* Tell the user about the fatal error. */
2658 scsi_sense_print(&ccb->csio);
2659 goto sagetparamsexit;
2660 }
2661
2662 /*
2663 * If the user only wants the compression information, and
2664 * the device doesn't send back the block descriptor, it's
2665 * no big deal. If the user wants more than just
2666 * compression, though, and the device doesn't pass back the
2667 * block descriptor, we need to send another mode sense to
2668 * get the block descriptor.
2669 */
2670 if ((mode_hdr->blk_desc_len == 0) &&
2671 (params_to_get & SA_PARAM_COMPRESSION) &&
2672 (params_to_get & ~(SA_PARAM_COMPRESSION))) {
2673
2674 /*
2675 * Decrease the mode buffer length by the size of
2676 * the compression page, to make sure the data
2677 * there doesn't get overwritten.
2678 */
2679 mode_buffer_len -= sizeof (sa_comp_t);
2680
2681 /*
2682 * Now move the compression page that we presumably
2683 * got back down the memory chunk a little bit so
2684 * it doesn't get spammed.
2685 */
2686 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
2687 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
2688
2689 /*
2690 * Now, we issue another mode sense and just ask
2691 * for the block descriptor, etc.
2692 */
2693
2694 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2695 SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
2696 mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
2697 SCSIOP_TIMEOUT);
2698
2699 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2700 &softc->device_stats);
2701 QFRLS(ccb);
2702
2703 if (error != 0)
2704 goto sagetparamsexit;
2705 }
2706
2707 if (params_to_get & SA_PARAM_BLOCKSIZE)
2708 *blocksize = scsi_3btoul(mode_blk->blklen);
2709
2710 if (params_to_get & SA_PARAM_NUMBLOCKS)
2711 *numblocks = scsi_3btoul(mode_blk->nblocks);
2712
2713 if (params_to_get & SA_PARAM_BUFF_MODE)
2714 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
2715
2716 if (params_to_get & SA_PARAM_DENSITY)
2717 *density = mode_blk->density;
2718
2719 if (params_to_get & SA_PARAM_WP)
2720 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
2721
2722 if (params_to_get & SA_PARAM_SPEED)
2723 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
2724
2725 if (params_to_get & SA_PARAM_COMPRESSION) {
2726 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
2727 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2728 struct scsi_data_compression_page *cp = &ntcs->dcomp;
2729 *comp_supported =
2730 (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
2731 *comp_enabled =
2732 (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
2733 *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
2734 } else {
2735 struct scsi_dev_conf_page *cp = &ntcs->dconf;
2736 /*
2737 * We don't really know whether this device supports
2738 * Data Compression if the the algorithm field is
2739 * zero. Just say we do.
2740 */
2741 *comp_supported = TRUE;
2742 *comp_enabled =
2743 (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
2744 *comp_algorithm = cp->sel_comp_alg;
2745 }
2746 if (tcs != NULL)
2747 bcopy(ntcs, tcs, sizeof (sa_comp_t));
2748 }
2749
2750 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2751 int idx;
2752 char *xyz = mode_buffer;
2753 xpt_print_path(periph->path);
2754 kprintf("Mode Sense Data=");
2755 for (idx = 0; idx < mode_buffer_len; idx++)
2756 kprintf(" 0x%02x", xyz[idx] & 0xff);
2757 kprintf("\n");
2758 }
2759
2760 sagetparamsexit:
2761
2762 xpt_release_ccb(ccb);
2763 kfree(mode_buffer, M_TEMP);
2764 return (error);
2765 }
2766
2767 /*
2768 * The purpose of this function is to set one of four different parameters
2769 * for a tape drive:
2770 * - blocksize
2771 * - density
2772 * - compression / compression algorithm
2773 * - buffering mode
2774 *
2775 * The assumption is that this will be called from saioctl(), and therefore
2776 * from a process context. Thus the waiting malloc calls below. If that
2777 * assumption ever changes, the malloc calls should be changed to be
2778 * NOWAIT mallocs.
2779 *
2780 * Any or all of the four parameters may be set when this function is
2781 * called. It should handle setting more than one parameter at once.
2782 */
2783 static int
2784 sasetparams(struct cam_periph *periph, sa_params params_to_set,
2785 u_int32_t blocksize, u_int8_t density, u_int32_t calg,
2786 u_int32_t sense_flags)
2787 {
2788 struct sa_softc *softc;
2789 u_int32_t current_blocksize;
2790 u_int32_t current_calg;
2791 u_int8_t current_density;
2792 u_int8_t current_speed;
2793 int comp_enabled, comp_supported;
2794 void *mode_buffer;
2795 int mode_buffer_len;
2796 struct scsi_mode_header_6 *mode_hdr;
2797 struct scsi_mode_blk_desc *mode_blk;
2798 sa_comp_t *ccomp, *cpage;
2799 int buff_mode;
2800 union ccb *ccb = NULL;
2801 int error;
2802
2803 softc = (struct sa_softc *)periph->softc;
2804
2805 ccomp = kmalloc(sizeof (sa_comp_t), M_TEMP, M_INTWAIT);
2806
2807 /*
2808 * Since it doesn't make sense to set the number of blocks, or
2809 * write protection, we won't try to get the current value. We
2810 * always want to get the blocksize, so we can set it back to the
2811 * proper value.
2812 */
2813 error = sagetparams(periph,
2814 params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
2815 &current_blocksize, &current_density, NULL, &buff_mode, NULL,
2816 &current_speed, &comp_supported, &comp_enabled,
2817 &current_calg, ccomp);
2818
2819 if (error != 0) {
2820 kfree(ccomp, M_TEMP);
2821 return (error);
2822 }
2823
2824 mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2825 if (params_to_set & SA_PARAM_COMPRESSION)
2826 mode_buffer_len += sizeof (sa_comp_t);
2827
2828 mode_buffer = kmalloc(mode_buffer_len, M_TEMP, M_INTWAIT | M_ZERO);
2829
2830 mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2831 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2832
2833 ccb = cam_periph_getccb(periph, 1);
2834
2835 retry:
2836
2837 if (params_to_set & SA_PARAM_COMPRESSION) {
2838 if (mode_blk) {
2839 cpage = (sa_comp_t *)&mode_blk[1];
2840 } else {
2841 cpage = (sa_comp_t *)&mode_hdr[1];
2842 }
2843 bcopy(ccomp, cpage, sizeof (sa_comp_t));
2844 cpage->hdr.pagecode &= ~0x80;
2845 } else
2846 cpage = NULL;
2847
2848 /*
2849 * If the caller wants us to set the blocksize, use the one they
2850 * pass in. Otherwise, use the blocksize we got back from the
2851 * mode select above.
2852 */
2853 if (mode_blk) {
2854 if (params_to_set & SA_PARAM_BLOCKSIZE)
2855 scsi_ulto3b(blocksize, mode_blk->blklen);
2856 else
2857 scsi_ulto3b(current_blocksize, mode_blk->blklen);
2858
2859 /*
2860 * Set density if requested, else preserve old density.
2861 * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2862 * devices, else density we've latched up in our softc.
2863 */
2864 if (params_to_set & SA_PARAM_DENSITY) {
2865 mode_blk->density = density;
2866 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2867 mode_blk->density = SCSI_SAME_DENSITY;
2868 } else {
2869 mode_blk->density = softc->media_density;
2870 }
2871 }
2872
2873 /*
2874 * For mode selects, these two fields must be zero.
2875 */
2876 mode_hdr->data_length = 0;
2877 mode_hdr->medium_type = 0;
2878
2879 /* set the speed to the current value */
2880 mode_hdr->dev_spec = current_speed;
2881
2882 /* if set, set single-initiator buffering mode */
2883 if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
2884 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
2885 }
2886
2887 if (mode_blk)
2888 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
2889 else
2890 mode_hdr->blk_desc_len = 0;
2891
2892 /*
2893 * First, if the user wants us to set the compression algorithm or
2894 * just turn compression on, check to make sure that this drive
2895 * supports compression.
2896 */
2897 if (params_to_set & SA_PARAM_COMPRESSION) {
2898 /*
2899 * If the compression algorithm is 0, disable compression.
2900 * If the compression algorithm is non-zero, enable
2901 * compression and set the compression type to the
2902 * specified compression algorithm, unless the algorithm is
2903 * MT_COMP_ENABLE. In that case, we look at the
2904 * compression algorithm that is currently set and if it is
2905 * non-zero, we leave it as-is. If it is zero, and we have
2906 * saved a compression algorithm from a time when
2907 * compression was enabled before, set the compression to
2908 * the saved value.
2909 */
2910 switch (ccomp->hdr.pagecode & ~0x80) {
2911 case SA_DEVICE_CONFIGURATION_PAGE:
2912 {
2913 struct scsi_dev_conf_page *dcp = &cpage->dconf;
2914 if (calg == 0) {
2915 dcp->sel_comp_alg = SA_COMP_NONE;
2916 break;
2917 }
2918 if (calg != MT_COMP_ENABLE) {
2919 dcp->sel_comp_alg = calg;
2920 } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
2921 softc->saved_comp_algorithm != 0) {
2922 dcp->sel_comp_alg = softc->saved_comp_algorithm;
2923 }
2924 break;
2925 }
2926 case SA_DATA_COMPRESSION_PAGE:
2927 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
2928 struct scsi_data_compression_page *dcp = &cpage->dcomp;
2929 if (calg == 0) {
2930 /*
2931 * Disable compression, but leave the
2932 * decompression and the capability bit
2933 * alone.
2934 */
2935 dcp->dce_and_dcc = SA_DCP_DCC;
2936 dcp->dde_and_red |= SA_DCP_DDE;
2937 break;
2938 }
2939 /* enable compression && decompression */
2940 dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
2941 dcp->dde_and_red |= SA_DCP_DDE;
2942 /*
2943 * If there, use compression algorithm from caller.
2944 * Otherwise, if there's a saved compression algorithm
2945 * and there is no current algorithm, use the saved
2946 * algorithm. Else parrot back what we got and hope
2947 * for the best.
2948 */
2949 if (calg != MT_COMP_ENABLE) {
2950 scsi_ulto4b(calg, dcp->comp_algorithm);
2951 scsi_ulto4b(calg, dcp->decomp_algorithm);
2952 } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
2953 softc->saved_comp_algorithm != 0) {
2954 scsi_ulto4b(softc->saved_comp_algorithm,
2955 dcp->comp_algorithm);
2956 scsi_ulto4b(softc->saved_comp_algorithm,
2957 dcp->decomp_algorithm);
2958 }
2959 break;
2960 }
2961 /*
2962 * Compression does not appear to be supported-
2963 * at least via the DATA COMPRESSION page. It
2964 * would be too much to ask us to believe that
2965 * the page itself is supported, but incorrectly
2966 * reports an ability to manipulate data compression,
2967 * so we'll assume that this device doesn't support
2968 * compression. We can just fall through for that.
2969 */
2970 /* FALLTHROUGH */
2971 default:
2972 /*
2973 * The drive doesn't seem to support compression,
2974 * so turn off the set compression bit.
2975 */
2976 params_to_set &= ~SA_PARAM_COMPRESSION;
2977 xpt_print_path(periph->path);
2978 kprintf("device does not seem to support compression\n");
2979
2980 /*
2981 * If that was the only thing the user wanted us to set,
2982 * clean up allocated resources and return with
2983 * 'operation not supported'.
2984 */
2985 if (params_to_set == SA_PARAM_NONE) {
2986 kfree(mode_buffer, M_TEMP);
2987 xpt_release_ccb(ccb);
2988 return (ENODEV);
2989 }
2990
2991 /*
2992 * That wasn't the only thing the user wanted us to set.
2993 * So, decrease the stated mode buffer length by the
2994 * size of the compression mode page.
2995 */
2996 mode_buffer_len -= sizeof(sa_comp_t);
2997 }
2998 }
2999
3000 /* It is safe to retry this operation */
3001 scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
3002 (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
3003 FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3004
3005 error = cam_periph_runccb(ccb, saerror, 0,
3006 sense_flags, &softc->device_stats);
3007 QFRLS(ccb);
3008
3009 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3010 int idx;
3011 char *xyz = mode_buffer;
3012 xpt_print_path(periph->path);
3013 kprintf("Err%d, Mode Select Data=", error);
3014 for (idx = 0; idx < mode_buffer_len; idx++)
3015 kprintf(" 0x%02x", xyz[idx] & 0xff);
3016 kprintf("\n");
3017 }
3018
3019
3020 if (error) {
3021 /*
3022 * If we can, try without setting density/blocksize.
3023 */
3024 if (mode_blk) {
3025 if ((params_to_set &
3026 (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
3027 mode_blk = NULL;
3028 goto retry;
3029 }
3030 } else {
3031 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
3032 cpage = (sa_comp_t *)&mode_blk[1];
3033 }
3034
3035 /*
3036 * If we were setting the blocksize, and that failed, we
3037 * want to set it to its original value. If we weren't
3038 * setting the blocksize, we don't want to change it.
3039 */
3040 scsi_ulto3b(current_blocksize, mode_blk->blklen);
3041
3042 /*
3043 * Set density if requested, else preserve old density.
3044 * SCSI_SAME_DENSITY only applies to SCSI-2 or better
3045 * devices, else density we've latched up in our softc.
3046 */
3047 if (params_to_set & SA_PARAM_DENSITY) {
3048 mode_blk->density = current_density;
3049 } else if (softc->scsi_rev > SCSI_REV_CCS) {
3050 mode_blk->density = SCSI_SAME_DENSITY;
3051 } else {
3052 mode_blk->density = softc->media_density;
3053 }
3054
3055 if (params_to_set & SA_PARAM_COMPRESSION)
3056 bcopy(ccomp, cpage, sizeof (sa_comp_t));
3057
3058 /*
3059 * The retry count is the only CCB field that might have been
3060 * changed that we care about, so reset it back to 1.
3061 */
3062 ccb->ccb_h.retry_count = 1;
3063 cam_periph_runccb(ccb, saerror, 0, sense_flags,
3064 &softc->device_stats);
3065 QFRLS(ccb);
3066 }
3067
3068 xpt_release_ccb(ccb);
3069
3070 if (ccomp != NULL)
3071 kfree(ccomp, M_TEMP);
3072
3073 if (params_to_set & SA_PARAM_COMPRESSION) {
3074 if (error) {
3075 softc->flags &= ~SA_FLAG_COMP_ENABLED;
3076 /*
3077 * Even if we get an error setting compression,
3078 * do not say that we don't support it. We could
3079 * have been wrong, or it may be media specific.
3080 * softc->flags &= ~SA_FLAG_COMP_SUPP;
3081 */
3082 softc->saved_comp_algorithm = softc->comp_algorithm;
3083 softc->comp_algorithm = 0;
3084 } else {
3085 softc->flags |= SA_FLAG_COMP_ENABLED;
3086 softc->comp_algorithm = calg;
3087 }
3088 }
3089
3090 kfree(mode_buffer, M_TEMP);
3091 return (error);
3092 }
3093
3094 static void
3095 saprevent(struct cam_periph *periph, int action)
3096 {
3097 struct sa_softc *softc;
3098 union ccb *ccb;
3099 int error, sf;
3100
3101 softc = (struct sa_softc *)periph->softc;
3102
3103 if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
3104 return;
3105 if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
3106 return;
3107
3108 /*
3109 * We can be quiet about illegal requests.
3110 */
3111 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3112 sf = 0;
3113 } else
3114 sf = SF_QUIET_IR;
3115
3116 ccb = cam_periph_getccb(periph, 1);
3117
3118 /* It is safe to retry this operation */
3119 scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
3120 SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3121
3122 error = cam_periph_runccb(ccb, saerror, 0, sf, &softc->device_stats);
3123 QFRLS(ccb);
3124 if (error == 0) {
3125 if (action == PR_ALLOW)
3126 softc->flags &= ~SA_FLAG_TAPE_LOCKED;
3127 else
3128 softc->flags |= SA_FLAG_TAPE_LOCKED;
3129 }
3130
3131 xpt_release_ccb(ccb);
3132 }
3133
3134 static int
3135 sarewind(struct cam_periph *periph)
3136 {
3137 union ccb *ccb;
3138 struct sa_softc *softc;
3139 int error;
3140
3141 softc = (struct sa_softc *)periph->softc;
3142
3143 ccb = cam_periph_getccb(periph, 1);
3144
3145 /* It is safe to retry this operation */
3146 scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3147 SSD_FULL_SIZE, REWIND_TIMEOUT);
3148
3149 softc->dsreg = MTIO_DSREG_REW;
3150 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3151 softc->dsreg = MTIO_DSREG_REST;
3152
3153 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3154 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3155
3156 xpt_release_ccb(ccb);
3157 if (error == 0)
3158 softc->fileno = softc->blkno = (daddr_t) 0;
3159 else
3160 softc->fileno = softc->blkno = (daddr_t) -1;
3161 return (error);
3162 }
3163
3164 static int
3165 saspace(struct cam_periph *periph, int count, scsi_space_code code)
3166 {
3167 union ccb *ccb;
3168 struct sa_softc *softc;
3169 int error;
3170
3171 softc = (struct sa_softc *)periph->softc;
3172
3173 ccb = cam_periph_getccb(periph, 1);
3174
3175 /* This cannot be retried */
3176
3177 scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
3178 SSD_FULL_SIZE, SPACE_TIMEOUT);
3179
3180 /*
3181 * Clear residual because we will be using it.
3182 */
3183 softc->last_ctl_resid = 0;
3184
3185 softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
3186 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3187 softc->dsreg = MTIO_DSREG_REST;
3188
3189 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3190 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3191
3192 xpt_release_ccb(ccb);
3193
3194 /*
3195 * If a spacing operation has failed, we need to invalidate
3196 * this mount.
3197 *
3198 * If the spacing operation was setmarks or to end of recorded data,
3199 * we no longer know our relative position.
3200 *
3201 * If the spacing operations was spacing files in reverse, we
3202 * take account of the residual, but still check against less
3203 * than zero- if we've gone negative, we must have hit BOT.
3204 *
3205 * If the spacing operations was spacing records in reverse and
3206 * we have a residual, we've either hit BOT or hit a filemark.
3207 * In the former case, we know our new record number (0). In
3208 * the latter case, we have absolutely no idea what the real
3209 * record number is- we've stopped between the end of the last
3210 * record in the previous file and the filemark that stopped
3211 * our spacing backwards.
3212 */
3213 if (error) {
3214 softc->fileno = softc->blkno = (daddr_t) -1;
3215 } else if (code == SS_SETMARKS || code == SS_EOD) {
3216 softc->fileno = softc->blkno = (daddr_t) -1;
3217 } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
3218 softc->fileno += (count - softc->last_ctl_resid);
3219 if (softc->fileno < 0) /* we must of hit BOT */
3220 softc->fileno = 0;
3221 softc->blkno = 0;
3222 } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
3223 softc->blkno += (count - softc->last_ctl_resid);
3224 if (count < 0) {
3225 if (softc->last_ctl_resid || softc->blkno < 0) {
3226 if (softc->fileno == 0) {
3227 softc->blkno = 0;
3228 } else {
3229 softc->blkno = (daddr_t) -1;
3230 }
3231 }
3232 }
3233 }
3234 return (error);
3235 }
3236
3237 static int
3238 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
3239 {
3240 union ccb *ccb;
3241 struct sa_softc *softc;
3242 int error, nwm = 0;
3243
3244 softc = (struct sa_softc *)periph->softc;
3245 if (softc->open_rdonly)
3246 return (EBADF);
3247
3248 ccb = cam_periph_getccb(periph, 1);
3249 /*
3250 * Clear residual because we will be using it.
3251 */
3252 softc->last_ctl_resid = 0;
3253
3254 softc->dsreg = MTIO_DSREG_FMK;
3255 /* this *must* not be retried */
3256 scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
3257 FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
3258 softc->dsreg = MTIO_DSREG_REST;
3259
3260
3261 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3262
3263 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3264 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3265
3266 if (error == 0 && nmarks) {
3267 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3268 nwm = nmarks - softc->last_ctl_resid;
3269 softc->filemarks += nwm;
3270 }
3271
3272 xpt_release_ccb(ccb);
3273
3274 /*
3275 * Update relative positions (if we're doing that).
3276 */
3277 if (error) {
3278 softc->fileno = softc->blkno = (daddr_t) -1;
3279 } else if (softc->fileno != (daddr_t) -1) {
3280 softc->fileno += nwm;
3281 softc->blkno = 0;
3282 }
3283 return (error);
3284 }
3285
3286 static int
3287 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3288 {
3289 struct scsi_tape_position_data loc;
3290 union ccb *ccb;
3291 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3292 int error;
3293
3294 /*
3295 * We try and flush any buffered writes here if we were writing
3296 * and we're trying to get hardware block position. It eats
3297 * up performance substantially, but I'm wary of drive firmware.
3298 *
3299 * I think that *logical* block position is probably okay-
3300 * but hardware block position might have to wait for data
3301 * to hit media to be valid. Caveat Emptor.
3302 */
3303
3304 if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
3305 error = sawritefilemarks(periph, 0, 0);
3306 if (error && error != EACCES)
3307 return (error);
3308 }
3309
3310 ccb = cam_periph_getccb(periph, 1);
3311 scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3312 hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3313 softc->dsreg = MTIO_DSREG_RBSY;
3314 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3315 softc->dsreg = MTIO_DSREG_REST;
3316 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3317 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3318
3319 if (error == 0) {
3320 if (loc.flags & SA_RPOS_UNCERTAIN) {
3321 error = EINVAL; /* nothing is certain */
3322 } else {
3323 *blkptr = scsi_4btoul(loc.firstblk);
3324 }
3325 }
3326
3327 xpt_release_ccb(ccb);
3328 return (error);
3329 }
3330
3331 static int
3332 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3333 {
3334 union ccb *ccb;
3335 struct sa_softc *softc;
3336 int error;
3337
3338 /*
3339 * We used to try and flush any buffered writes here.
3340 * Now we push this onto user applications to either
3341 * flush the pending writes themselves (via a zero count
3342 * WRITE FILEMARKS command) or they can trust their tape
3343 * drive to do this correctly for them.
3344 */
3345
3346 softc = (struct sa_softc *)periph->softc;
3347 ccb = cam_periph_getccb(periph, 1);
3348
3349
3350 scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3351 hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
3352
3353
3354 softc->dsreg = MTIO_DSREG_POS;
3355 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3356 softc->dsreg = MTIO_DSREG_REST;
3357 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3358 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3359 xpt_release_ccb(ccb);
3360 /*
3361 * Note relative file && block number position as now unknown.
3362 */
3363 softc->fileno = softc->blkno = (daddr_t) -1;
3364 return (error);
3365 }
3366
3367 static int
3368 saretension(struct cam_periph *periph)
3369 {
3370 union ccb *ccb;
3371 struct sa_softc *softc;
3372 int error;
3373
3374 softc = (struct sa_softc *)periph->softc;
3375
3376 ccb = cam_periph_getccb(periph, 1);
3377
3378 /* It is safe to retry this operation */
3379 scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3380 FALSE, TRUE, TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
3381
3382 softc->dsreg = MTIO_DSREG_TEN;
3383 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3384 softc->dsreg = MTIO_DSREG_REST;
3385
3386 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3387 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3388 xpt_release_ccb(ccb);
3389 if (error == 0)
3390 softc->fileno = softc->blkno = (daddr_t) 0;
3391 else
3392 softc->fileno = softc->blkno = (daddr_t) -1;
3393 return (error);
3394 }
3395
3396 static int
3397 sareservereleaseunit(struct cam_periph *periph, int reserve)
3398 {
3399 union ccb *ccb;
3400 struct sa_softc *softc;
3401 int error;
3402
3403 softc = (struct sa_softc *)periph->softc;
3404 ccb = cam_periph_getccb(periph, 1);
3405
3406 /* It is safe to retry this operation */
3407 scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
3408 FALSE, 0, SSD_FULL_SIZE, SCSIOP_TIMEOUT, reserve);
3409 softc->dsreg = MTIO_DSREG_RBSY;
3410 error = cam_periph_runccb(ccb, saerror, 0,
3411 SF_RETRY_UA | SF_NO_PRINT, &softc->device_stats);
3412 softc->dsreg = MTIO_DSREG_REST;
3413 QFRLS(ccb);
3414 xpt_release_ccb(ccb);
3415
3416 /*
3417 * If the error was Illegal Request, then the device doesn't support
3418 * RESERVE/RELEASE. This is not an error.
3419 */
3420 if (error == EINVAL) {
3421 error = 0;
3422 }
3423
3424 return (error);
3425 }
3426
3427 static int
3428 saloadunload(struct cam_periph *periph, int load)
3429 {
3430 union ccb *ccb;
3431 struct sa_softc *softc;
3432 int error;
3433
3434 softc = (struct sa_softc *)periph->softc;
3435
3436 ccb = cam_periph_getccb(periph, 1);
3437
3438 /* It is safe to retry this operation */
3439 scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3440 FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
3441
3442 softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
3443 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3444 softc->dsreg = MTIO_DSREG_REST;
3445 QFRLS(ccb);
3446 xpt_release_ccb(ccb);
3447
3448 if (error || load == 0)
3449 softc->fileno = softc->blkno = (daddr_t) -1;
3450 else if (error == 0)
3451 softc->fileno = softc->blkno = (daddr_t) 0;
3452 return (error);
3453 }
3454
3455 static int
3456 saerase(struct cam_periph *periph, int longerase)
3457 {
3458
3459 union ccb *ccb;
3460 struct sa_softc *softc;
3461 int error;
3462
3463 softc = (struct sa_softc *)periph->softc;
3464 if (softc->open_rdonly)
3465 return (EBADF);
3466
3467 ccb = cam_periph_getccb(periph, 1);
3468
3469 scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
3470 SSD_FULL_SIZE, ERASE_TIMEOUT);
3471
3472 softc->dsreg = MTIO_DSREG_ZER;
3473 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3474 softc->dsreg = MTIO_DSREG_REST;
3475
3476 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3477 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3478 xpt_release_ccb(ccb);
3479 return (error);
3480 }
3481
3482 #endif /* _KERNEL */
3483
3484 /*
3485 * Read tape block limits command.
3486 */
3487 void
3488 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
3489 void (*cbfcnp)(struct cam_periph *, union ccb *),
3490 u_int8_t tag_action,
3491 struct scsi_read_block_limits_data *rlimit_buf,
3492 u_int8_t sense_len, u_int32_t timeout)
3493 {
3494 struct scsi_read_block_limits *scsi_cmd;
3495
3496 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3497 (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
3498 sizeof(*scsi_cmd), timeout);
3499
3500 scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
3501 bzero(scsi_cmd, sizeof(*scsi_cmd));
3502 scsi_cmd->opcode = READ_BLOCK_LIMITS;
3503 }
3504
3505 void
3506 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
3507 void (*cbfcnp)(struct cam_periph *, union ccb *),
3508 u_int8_t tag_action, int readop, int sli,
3509 int fixed, u_int32_t length, u_int8_t *data_ptr,
3510 u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
3511 {
3512 struct scsi_sa_rw *scsi_cmd;
3513
3514 scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
3515 scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
3516 scsi_cmd->sli_fixed = 0;
3517 if (sli && readop)
3518 scsi_cmd->sli_fixed |= SAR_SLI;
3519 if (fixed)
3520 scsi_cmd->sli_fixed |= SARW_FIXED;
3521 scsi_ulto3b(length, scsi_cmd->length);
3522 scsi_cmd->control = 0;
3523
3524 cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
3525 tag_action, data_ptr, dxfer_len, sense_len,
3526 sizeof(*scsi_cmd), timeout);
3527 }
3528
3529 void
3530 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
3531 void (*cbfcnp)(struct cam_periph *, union ccb *),
3532 u_int8_t tag_action, int immediate, int eot,
3533 int reten, int load, u_int8_t sense_len,
3534 u_int32_t timeout)
3535 {
3536 struct scsi_load_unload *scsi_cmd;
3537
3538 scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
3539 bzero(scsi_cmd, sizeof(*scsi_cmd));
3540 scsi_cmd->opcode = LOAD_UNLOAD;
3541 if (immediate)
3542 scsi_cmd->immediate = SLU_IMMED;
3543 if (eot)
3544 scsi_cmd->eot_reten_load |= SLU_EOT;
3545 if (reten)
3546 scsi_cmd->eot_reten_load |= SLU_RETEN;
3547 if (load)
3548 scsi_cmd->eot_reten_load |= SLU_LOAD;
3549
3550 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3551 NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
3552 }
3553
3554 void
3555 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
3556 void (*cbfcnp)(struct cam_periph *, union ccb *),
3557 u_int8_t tag_action, int immediate, u_int8_t sense_len,
3558 u_int32_t timeout)
3559 {
3560 struct scsi_rewind *scsi_cmd;
3561
3562 scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
3563 bzero(scsi_cmd, sizeof(*scsi_cmd));
3564 scsi_cmd->opcode = REWIND;
3565 if (immediate)
3566 scsi_cmd->immediate = SREW_IMMED;
3567
3568 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3569 0, sense_len, sizeof(*scsi_cmd), timeout);
3570 }
3571
3572 void
3573 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
3574 void (*cbfcnp)(struct cam_periph *, union ccb *),
3575 u_int8_t tag_action, scsi_space_code code,
3576 u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
3577 {
3578 struct scsi_space *scsi_cmd;
3579
3580 scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
3581 scsi_cmd->opcode = SPACE;
3582 scsi_cmd->code = code;
3583 scsi_ulto3b(count, scsi_cmd->count);
3584 scsi_cmd->control = 0;
3585
3586 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3587 0, sense_len, sizeof(*scsi_cmd), timeout);
3588 }
3589
3590 void
3591 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
3592 void (*cbfcnp)(struct cam_periph *, union ccb *),
3593 u_int8_t tag_action, int immediate, int setmark,
3594 u_int32_t num_marks, u_int8_t sense_len,
3595 u_int32_t timeout)
3596 {
3597 struct scsi_write_filemarks *scsi_cmd;
3598
3599 scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
3600 bzero(scsi_cmd, sizeof(*scsi_cmd));
3601 scsi_cmd->opcode = WRITE_FILEMARKS;
3602 if (immediate)
3603 scsi_cmd->byte2 |= SWFMRK_IMMED;
3604 if (setmark)
3605 scsi_cmd->byte2 |= SWFMRK_WSMK;
3606
3607 scsi_ulto3b(num_marks, scsi_cmd->num_marks);
3608
3609 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3610 0, sense_len, sizeof(*scsi_cmd), timeout);
3611 }
3612
3613 /*
3614 * The reserve and release unit commands differ only by their opcodes.
3615 */
3616 void
3617 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
3618 void (*cbfcnp)(struct cam_periph *, union ccb *),
3619 u_int8_t tag_action, int third_party,
3620 int third_party_id, u_int8_t sense_len,
3621 u_int32_t timeout, int reserve)
3622 {
3623 struct scsi_reserve_release_unit *scsi_cmd;
3624
3625 scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
3626 bzero(scsi_cmd, sizeof(*scsi_cmd));
3627
3628 if (reserve)
3629 scsi_cmd->opcode = RESERVE_UNIT;
3630 else
3631 scsi_cmd->opcode = RELEASE_UNIT;
3632
3633 if (third_party) {
3634 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
3635 scsi_cmd->lun_thirdparty |=
3636 ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
3637 }
3638
3639 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3640 0, sense_len, sizeof(*scsi_cmd), timeout);
3641 }
3642
3643 void
3644 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
3645 void (*cbfcnp)(struct cam_periph *, union ccb *),
3646 u_int8_t tag_action, int immediate, int long_erase,
3647 u_int8_t sense_len, u_int32_t timeout)
3648 {
3649 struct scsi_erase *scsi_cmd;
3650
3651 scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
3652 bzero(scsi_cmd, sizeof(*scsi_cmd));
3653
3654 scsi_cmd->opcode = ERASE;
3655
3656 if (immediate)
3657 scsi_cmd->lun_imm_long |= SE_IMMED;
3658
3659 if (long_erase)
3660 scsi_cmd->lun_imm_long |= SE_LONG;
3661
3662 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3663 0, sense_len, sizeof(*scsi_cmd), timeout);
3664 }
3665
3666 /*
3667 * Read Tape Position command.
3668 */
3669 void
3670 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
3671 void (*cbfcnp)(struct cam_periph *, union ccb *),
3672 u_int8_t tag_action, int hardsoft,
3673 struct scsi_tape_position_data *sbp,
3674 u_int8_t sense_len, u_int32_t timeout)
3675 {
3676 struct scsi_tape_read_position *scmd;
3677
3678 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3679 (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
3680 scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
3681 bzero(scmd, sizeof(*scmd));
3682 scmd->opcode = READ_POSITION;
3683 scmd->byte1 = hardsoft;
3684 }
3685
3686 /*
3687 * Set Tape Position command.
3688 */
3689 void
3690 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
3691 void (*cbfcnp)(struct cam_periph *, union ccb *),
3692 u_int8_t tag_action, int hardsoft, u_int32_t blkno,
3693 u_int8_t sense_len, u_int32_t timeout)
3694 {
3695 struct scsi_tape_locate *scmd;
3696
3697 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3698 (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
3699 scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
3700 bzero(scmd, sizeof(*scmd));
3701 scmd->opcode = LOCATE;
3702 if (hardsoft)
3703 scmd->byte1 |= SA_SPOS_BT;
3704 scsi_ulto4b(blkno, scmd->blkaddr);
3705 }
DragonFly BSD