5811e1bf3c08d87ba319e8040e0026177e051362
[dragonfly.git] / sys / bus / cam / scsi / scsi_ch.c
1 /*
2  * Copyright (c) 1997 Justin T. Gibbs.
3  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions, and the following disclaimer,
11  *    without modification, immediately at the beginning of the file.
12  * 2. The name of the author may not be used to endorse or promote products
13  *    derived from this software without specific prior written permission.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
19  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  * $FreeBSD: src/sys/cam/scsi/scsi_ch.c,v 1.20.2.2 2000/10/31 08:09:49 dwmalone Exp $
28  * $DragonFly: src/sys/bus/cam/scsi/scsi_ch.c,v 1.11 2005/06/02 20:40:31 dillon Exp $
29  */
30 /*
31  * Derived from the NetBSD SCSI changer driver.
32  *
33  *      $NetBSD: ch.c,v 1.32 1998/01/12 09:49:12 thorpej Exp $
34  *
35  */
36 /*
37  * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
38  * All rights reserved.
39  *
40  * Partially based on an autochanger driver written by Stefan Grefen
41  * and on an autochanger driver written by the Systems Programming Group
42  * at the University of Utah Computer Science Department.
43  *
44  * Redistribution and use in source and binary forms, with or without
45  * modification, are permitted provided that the following conditions
46  * are met:
47  * 1. Redistributions of source code must retain the above copyright
48  *    notice, this list of conditions and the following disclaimer.
49  * 2. Redistributions in binary form must reproduce the above copyright
50  *    notice, this list of conditions and the following disclaimer in the
51  *    documentation and/or other materials provided with the distribution.
52  * 3. All advertising materials mentioning features or use of this software
53  *    must display the following acknowledgements:
54  *      This product includes software developed by Jason R. Thorpe
55  *      for And Communications, http://www.and.com/
56  * 4. The name of the author may not be used to endorse or promote products
57  *    derived from this software without specific prior written permission.
58  *
59  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
60  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
61  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
62  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
63  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
64  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
65  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
66  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
67  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69  * SUCH DAMAGE.
70  */
71
72 #include <sys/param.h>
73 #include <sys/queue.h>
74 #include <sys/systm.h>
75 #include <sys/kernel.h>
76 #include <sys/types.h>
77 #include <sys/malloc.h>
78 #include <sys/fcntl.h>
79 #include <sys/stat.h>
80 #include <sys/conf.h>
81 #include <sys/buf.h>
82 #include <sys/chio.h>
83 #include <sys/errno.h>
84 #include <sys/devicestat.h>
85 #include <sys/thread2.h>
86
87 #include "../cam.h"
88 #include "../cam_ccb.h"
89 #include "../cam_extend.h"
90 #include "../cam_periph.h"
91 #include "../cam_xpt_periph.h"
92 #include "../cam_queue.h"
93 #include "../cam_debug.h"
94
95 #include "scsi_all.h"
96 #include "scsi_message.h"
97 #include "scsi_ch.h"
98
99 /*
100  * Timeout definitions for various changer related commands.  They may
101  * be too short for some devices (especially the timeout for INITIALIZE
102  * ELEMENT STATUS).
103  */
104
105 static const u_int32_t  CH_TIMEOUT_MODE_SENSE                = 6000;
106 static const u_int32_t  CH_TIMEOUT_MOVE_MEDIUM               = 100000;
107 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 100000;
108 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 100000;
109 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 10000;
110 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
111 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
112
113 typedef enum {
114         CH_FLAG_INVALID         = 0x001,
115         CH_FLAG_OPEN            = 0x002
116 } ch_flags;
117
118 typedef enum {
119         CH_STATE_PROBE,
120         CH_STATE_NORMAL
121 } ch_state;
122
123 typedef enum {
124         CH_CCB_PROBE,
125         CH_CCB_WAITING
126 } ch_ccb_types;
127
128 typedef enum {
129         CH_Q_NONE       = 0x00,
130         CH_Q_NO_DBD     = 0x01
131 } ch_quirks;
132
133 #define ccb_state       ppriv_field0
134 #define ccb_bp          ppriv_ptr1
135
136 struct scsi_mode_sense_data {
137         struct scsi_mode_header_6 header;
138         struct scsi_mode_blk_desc blk_desc;
139         union {
140                 struct page_element_address_assignment ea;
141                 struct page_transport_geometry_parameters tg;
142                 struct page_device_capabilities cap;
143         } pages;
144 };
145
146 struct ch_softc {
147         ch_flags        flags;
148         ch_state        state;
149         ch_quirks       quirks;
150         union ccb       saved_ccb;
151         struct devstat  device_stats;
152
153         int             sc_picker;      /* current picker */
154
155         /*
156          * The following information is obtained from the
157          * element address assignment page.
158          */
159         int             sc_firsts[4];   /* firsts, indexed by CHET_* */
160         int             sc_counts[4];   /* counts, indexed by CHET_* */
161
162         /*
163          * The following mask defines the legal combinations
164          * of elements for the MOVE MEDIUM command.
165          */
166         u_int8_t        sc_movemask[4];
167
168         /*
169          * As above, but for EXCHANGE MEDIUM.
170          */
171         u_int8_t        sc_exchangemask[4];
172
173         /*
174          * Quirks; see below.  XXX KDM not implemented yet
175          */
176         int             sc_settledelay; /* delay for settle */
177 };
178
179 #define CHUNIT(x)       (minor((x)))
180 #define CH_CDEV_MAJOR   17
181
182 static  d_open_t        chopen;
183 static  d_close_t       chclose;
184 static  d_ioctl_t       chioctl;
185 static  periph_init_t   chinit;
186 static  periph_ctor_t   chregister;
187 static  periph_oninv_t  choninvalidate;
188 static  periph_dtor_t   chcleanup;
189 static  periph_start_t  chstart;
190 static  void            chasync(void *callback_arg, u_int32_t code,
191                                 struct cam_path *path, void *arg);
192 static  void            chdone(struct cam_periph *periph,
193                                union ccb *done_ccb);
194 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
195                                 u_int32_t sense_flags);
196 static  int             chmove(struct cam_periph *periph,
197                                struct changer_move *cm);
198 static  int             chexchange(struct cam_periph *periph,
199                                    struct changer_exchange *ce);
200 static  int             chposition(struct cam_periph *periph,
201                                    struct changer_position *cp);
202 static  int             chgetelemstatus(struct cam_periph *periph,
203                                 struct changer_element_status_request *csr);
204 static  int             chsetvoltag(struct cam_periph *periph,
205                                     struct changer_set_voltag_request *csvr);
206 static  int             chielem(struct cam_periph *periph, 
207                                 unsigned int timeout);
208 static  int             chgetparams(struct cam_periph *periph);
209
210 static struct periph_driver chdriver =
211 {
212         chinit, "ch",
213         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
214 };
215
216 DATA_SET(periphdriver_set, chdriver);
217
218 static struct cdevsw ch_cdevsw = {
219         /* name */      "ch",
220         /* maj */       CH_CDEV_MAJOR,
221         /* flags */     0,
222         /* port */      NULL,
223         /* clone */     NULL,
224
225         /* open */      chopen,
226         /* close */     chclose,
227         /* read */      noread,
228         /* write */     nowrite,
229         /* ioctl */     chioctl,
230         /* poll */      nopoll,
231         /* mmap */      nommap,
232         /* strategy */  nostrategy,
233         /* dump */      nodump,
234         /* psize */     nopsize
235 };
236
237 static struct extend_array *chperiphs;
238
239 void
240 chinit(void)
241 {
242         cam_status status;
243         struct cam_path *path;
244
245         /*
246          * Create our extend array for storing the devices we attach to.
247          */
248         chperiphs = cam_extend_new();
249         if (chperiphs == NULL) {
250                 printf("ch: Failed to alloc extend array!\n");
251                 return;
252         }
253
254         /*
255          * Install a global async callback.  This callback will
256          * receive async callbacks like "new device found".
257          */
258         status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
259                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
260
261         if (status == CAM_REQ_CMP) {
262                 struct ccb_setasync csa;
263
264                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
265                 csa.ccb_h.func_code = XPT_SASYNC_CB;
266                 csa.event_enable = AC_FOUND_DEVICE;
267                 csa.callback = chasync;
268                 csa.callback_arg = NULL;
269                 xpt_action((union ccb *)&csa);
270                 status = csa.ccb_h.status;
271                 xpt_free_path(path);
272         }
273
274         if (status != CAM_REQ_CMP) {
275                 printf("ch: Failed to attach master async callback "
276                        "due to status 0x%x!\n", status);
277         }
278 }
279
280 static void
281 choninvalidate(struct cam_periph *periph)
282 {
283         struct ch_softc *softc;
284         struct ccb_setasync csa;
285
286         softc = (struct ch_softc *)periph->softc;
287
288         /*
289          * De-register any async callbacks.
290          */
291         xpt_setup_ccb(&csa.ccb_h, periph->path,
292                       /* priority */ 5);
293         csa.ccb_h.func_code = XPT_SASYNC_CB;
294         csa.event_enable = 0;
295         csa.callback = chasync;
296         csa.callback_arg = periph;
297         xpt_action((union ccb *)&csa);
298
299         softc->flags |= CH_FLAG_INVALID;
300
301         xpt_print_path(periph->path);
302         printf("lost device\n");
303
304 }
305
306 static void
307 chcleanup(struct cam_periph *periph)
308 {
309         struct ch_softc *softc;
310
311         softc = (struct ch_softc *)periph->softc;
312
313         devstat_remove_entry(&softc->device_stats);
314         cam_extend_release(chperiphs, periph->unit_number);
315         xpt_print_path(periph->path);
316         printf("removing device entry\n");
317         cdevsw_remove(&ch_cdevsw, -1, periph->unit_number);
318         free(softc, M_DEVBUF);
319 }
320
321 static void
322 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
323 {
324         struct cam_periph *periph;
325
326         periph = (struct cam_periph *)callback_arg;
327
328         switch(code) {
329         case AC_FOUND_DEVICE:
330         {
331                 struct ccb_getdev *cgd;
332                 cam_status status;
333
334                 cgd = (struct ccb_getdev *)arg;
335
336                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
337                         break;
338
339                 /*
340                  * Allocate a peripheral instance for
341                  * this device and start the probe
342                  * process.
343                  */
344                 status = cam_periph_alloc(chregister, choninvalidate,
345                                           chcleanup, chstart, "ch",
346                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
347                                           chasync, AC_FOUND_DEVICE, cgd);
348
349                 if (status != CAM_REQ_CMP
350                  && status != CAM_REQ_INPROG)
351                         printf("chasync: Unable to probe new device "
352                                "due to status 0x%x\n", status);
353
354                 break;
355
356         }
357         default:
358                 cam_periph_async(periph, code, path, arg);
359                 break;
360         }
361 }
362
363 static cam_status
364 chregister(struct cam_periph *periph, void *arg)
365 {
366         struct ch_softc *softc;
367         struct ccb_setasync csa;
368         struct ccb_getdev *cgd;
369
370         cgd = (struct ccb_getdev *)arg;
371         if (periph == NULL) {
372                 printf("chregister: periph was NULL!!\n");
373                 return(CAM_REQ_CMP_ERR);
374         }
375
376         if (cgd == NULL) {
377                 printf("chregister: no getdev CCB, can't register device\n");
378                 return(CAM_REQ_CMP_ERR);
379         }
380
381         softc = malloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
382         softc->state = CH_STATE_PROBE;
383         periph->softc = softc;
384         cam_extend_set(chperiphs, periph->unit_number, periph);
385         softc->quirks = CH_Q_NONE;
386
387         /*
388          * Changers don't have a blocksize, and obviously don't support
389          * tagged queueing.
390          */
391         devstat_add_entry(&softc->device_stats, "ch",
392                           periph->unit_number, 0,
393                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
394                           SID_TYPE(&cgd->inq_data)| DEVSTAT_TYPE_IF_SCSI,
395                           DEVSTAT_PRIORITY_OTHER);
396
397         /* Register the device */
398         cdevsw_add(&ch_cdevsw, -1, periph->unit_number);
399         make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
400                   GID_OPERATOR, 0600, "%s%d", periph->periph_name,
401                   periph->unit_number);
402
403         /*
404          * Add an async callback so that we get
405          * notified if this device goes away.
406          */
407         xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5);
408         csa.ccb_h.func_code = XPT_SASYNC_CB;
409         csa.event_enable = AC_LOST_DEVICE;
410         csa.callback = chasync;
411         csa.callback_arg = periph;
412         xpt_action((union ccb *)&csa);
413
414         /*
415          * Lock this peripheral until we are setup.
416          * This first call can't block
417          */
418         (void)cam_periph_lock(periph, 0);
419         xpt_schedule(periph, /*priority*/5);
420
421         return(CAM_REQ_CMP);
422 }
423
424 static int
425 chopen(dev_t dev, int flags, int fmt, struct thread *td)
426 {
427         struct cam_periph *periph;
428         struct ch_softc *softc;
429         int unit, error;
430
431         unit = CHUNIT(dev);
432         periph = cam_extend_get(chperiphs, unit);
433
434         if (periph == NULL)
435                 return(ENXIO);
436
437         softc = (struct ch_softc *)periph->softc;
438
439         crit_enter();
440         if (softc->flags & CH_FLAG_INVALID) {
441                 crit_exit();
442                 return(ENXIO);
443         }
444
445         if ((error = cam_periph_lock(periph, PCATCH)) != 0) {
446                 crit_exit();
447                 return (error);
448         }
449         
450         crit_exit();
451
452         if ((softc->flags & CH_FLAG_OPEN) == 0) {
453                 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
454                         return(ENXIO);
455                 softc->flags |= CH_FLAG_OPEN;
456         }
457
458         /*
459          * Load information about this changer device into the softc.
460          */
461         if ((error = chgetparams(periph)) != 0) {
462                 softc->flags &= ~CH_FLAG_OPEN;
463                 cam_periph_unlock(periph);
464                 cam_periph_release(periph);
465                 return(error);
466         }
467
468         cam_periph_unlock(periph);
469
470         return(error);
471 }
472
473 static int
474 chclose(dev_t dev, int flag, int fmt, struct thread *td)
475 {
476         struct  cam_periph *periph;
477         struct  ch_softc *softc;
478         int     unit, error;
479
480         error = 0;
481
482         unit = CHUNIT(dev);
483         periph = cam_extend_get(chperiphs, unit);
484         if (periph == NULL)
485                 return(ENXIO);
486
487         softc = (struct ch_softc *)periph->softc;
488
489         if ((error = cam_periph_lock(periph, 0)) != 0)
490                 return(error);
491
492         softc->flags &= ~CH_FLAG_OPEN;
493
494         cam_periph_unlock(periph);
495         cam_periph_release(periph);
496
497         return(0);
498 }
499
500 static void
501 chstart(struct cam_periph *periph, union ccb *start_ccb)
502 {
503         struct ch_softc *softc;
504
505         softc = (struct ch_softc *)periph->softc;
506
507         switch (softc->state) {
508         case CH_STATE_NORMAL:
509         {
510                 crit_enter();
511                 if (periph->immediate_priority <= periph->pinfo.priority){
512                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
513
514                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
515                                           periph_links.sle);
516                         periph->immediate_priority = CAM_PRIORITY_NONE;
517                         wakeup(&periph->ccb_list);
518                 }
519                 crit_exit();
520                 break;
521         }
522         case CH_STATE_PROBE:
523         {
524                 int mode_buffer_len;
525                 void *mode_buffer;
526
527                 /*
528                  * Include the block descriptor when calculating the mode
529                  * buffer length,
530                  */
531                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
532                                   sizeof(struct scsi_mode_blk_desc) +
533                                  sizeof(struct page_element_address_assignment);
534
535                 mode_buffer = malloc(mode_buffer_len, M_TEMP, M_INTWAIT | M_ZERO);
536                 /*
537                  * Get the element address assignment page.
538                  */
539                 scsi_mode_sense(&start_ccb->csio,
540                                 /* retries */ 1,
541                                 /* cbfcnp */ chdone,
542                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
543                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
544                                         FALSE : TRUE,
545                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
546                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
547                                 /* param_buf */ (u_int8_t *)mode_buffer,
548                                 /* param_len */ mode_buffer_len,
549                                 /* sense_len */ SSD_FULL_SIZE,
550                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
551
552                 start_ccb->ccb_h.ccb_bp = NULL;
553                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
554                 xpt_action(start_ccb);
555                 break;
556         }
557         }
558 }
559
560 static void
561 chdone(struct cam_periph *periph, union ccb *done_ccb)
562 {
563         struct ch_softc *softc;
564         struct ccb_scsiio *csio;
565
566         softc = (struct ch_softc *)periph->softc;
567         csio = &done_ccb->csio;
568
569         switch(done_ccb->ccb_h.ccb_state) {
570         case CH_CCB_PROBE:
571         {
572                 struct scsi_mode_header_6 *mode_header;
573                 struct page_element_address_assignment *ea;
574                 char announce_buf[80];
575
576
577                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
578
579                 ea = (struct page_element_address_assignment *)
580                         find_mode_page_6(mode_header);
581
582                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
583                         
584                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
585                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
586                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
587                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
588                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
589                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
590                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
591                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
592                         softc->sc_picker = softc->sc_firsts[CHET_MT];
593
594 #define PLURAL(c)       (c) == 1 ? "" : "s"
595                         snprintf(announce_buf, sizeof(announce_buf),
596                                 "%d slot%s, %d drive%s, "
597                                 "%d picker%s, %d portal%s",
598                                 softc->sc_counts[CHET_ST],
599                                 PLURAL(softc->sc_counts[CHET_ST]),
600                                 softc->sc_counts[CHET_DT],
601                                 PLURAL(softc->sc_counts[CHET_DT]),
602                                 softc->sc_counts[CHET_MT],
603                                 PLURAL(softc->sc_counts[CHET_MT]),
604                                 softc->sc_counts[CHET_IE],
605                                 PLURAL(softc->sc_counts[CHET_IE]));
606 #undef PLURAL
607                 } else {
608                         int error;
609
610                         error = cherror(done_ccb, 0, SF_RETRY_UA |
611                                         SF_NO_PRINT | SF_RETRY_SELTO);
612                         /*
613                          * Retry any UNIT ATTENTION type errors.  They
614                          * are expected at boot.
615                          */
616                         if (error == ERESTART) {
617                                 /*
618                                  * A retry was scheuled, so
619                                  * just return.
620                                  */
621                                 return;
622                         } else if (error != 0) {
623                                 int retry_scheduled;
624                                 struct scsi_mode_sense_6 *sms;
625
626                                 sms = (struct scsi_mode_sense_6 *)
627                                         done_ccb->csio.cdb_io.cdb_bytes;
628
629                                 /*
630                                  * Check to see if block descriptors were
631                                  * disabled.  Some devices don't like that.
632                                  * We're taking advantage of the fact that
633                                  * the first few bytes of the 6 and 10 byte
634                                  * mode sense commands are the same.  If
635                                  * block descriptors were disabled, enable
636                                  * them and re-send the command.
637                                  */
638                                 if (sms->byte2 & SMS_DBD) {
639                                         sms->byte2 &= ~SMS_DBD;
640                                         xpt_action(done_ccb);
641                                         softc->quirks |= CH_Q_NO_DBD;
642                                         retry_scheduled = 1;
643                                 } else
644                                         retry_scheduled = 0;
645
646                                 /* Don't wedge this device's queue */
647                                 cam_release_devq(done_ccb->ccb_h.path,
648                                                  /*relsim_flags*/0,
649                                                  /*reduction*/0,
650                                                  /*timeout*/0,
651                                                  /*getcount_only*/0);
652
653                                 if (retry_scheduled)
654                                         return;
655
656                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
657                                     == CAM_SCSI_STATUS_ERROR) 
658                                         scsi_sense_print(&done_ccb->csio);
659                                 else {
660                                         xpt_print_path(periph->path);
661                                         printf("got CAM status %#x\n",
662                                                done_ccb->ccb_h.status);
663                                 }
664                                 xpt_print_path(periph->path);
665                                 printf("fatal error, failed to attach to"
666                                        " device\n");
667
668                                 cam_periph_invalidate(periph);
669
670                                 announce_buf[0] = '\0';
671                         }
672                 }
673                 if (announce_buf[0] != '\0')
674                         xpt_announce_periph(periph, announce_buf);
675                 softc->state = CH_STATE_NORMAL;
676                 free(mode_header, M_TEMP);
677                 /*
678                  * Since our peripheral may be invalidated by an error
679                  * above or an external event, we must release our CCB
680                  * before releasing the probe lock on the peripheral.
681                  * The peripheral will only go away once the last lock
682                  * is removed, and we need it around for the CCB release
683                  * operation.
684                  */
685                 xpt_release_ccb(done_ccb);
686                 cam_periph_unlock(periph);
687                 return;
688         }
689         case CH_CCB_WAITING:
690         {
691                 /* Caller will release the CCB */
692                 wakeup(&done_ccb->ccb_h.cbfcnp);
693                 return;
694         }
695         default:
696                 break;
697         }
698         xpt_release_ccb(done_ccb);
699 }
700
701 static int
702 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
703 {
704         struct ch_softc *softc;
705         struct cam_periph *periph;
706
707         periph = xpt_path_periph(ccb->ccb_h.path);
708         softc = (struct ch_softc *)periph->softc;
709
710         return (cam_periph_error(ccb, cam_flags, sense_flags,
711                                  &softc->saved_ccb));
712 }
713
714 static int
715 chioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
716 {
717         struct cam_periph *periph;
718         struct ch_softc *softc;
719         u_int8_t unit;
720         int error;
721
722         unit = CHUNIT(dev);
723
724         periph = cam_extend_get(chperiphs, unit);
725         if (periph == NULL)
726                 return(ENXIO);
727
728         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
729
730         softc = (struct ch_softc *)periph->softc;
731
732         error = 0;
733
734         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 
735                   ("trying to do ioctl %#lx\n", cmd));
736
737         /*
738          * If this command can change the device's state, we must
739          * have the device open for writing.
740          */
741         switch (cmd) {
742         case CHIOGPICKER:
743         case CHIOGPARAMS:
744         case CHIOGSTATUS:
745                 break;
746
747         default:
748                 if ((flag & FWRITE) == 0)
749                         return (EBADF);
750         }
751
752         switch (cmd) {
753         case CHIOMOVE:
754                 error = chmove(periph, (struct changer_move *)addr);
755                 break;
756
757         case CHIOEXCHANGE:
758                 error = chexchange(periph, (struct changer_exchange *)addr);
759                 break;
760
761         case CHIOPOSITION:
762                 error = chposition(periph, (struct changer_position *)addr);
763                 break;
764
765         case CHIOGPICKER:
766                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
767                 break;
768
769         case CHIOSPICKER:
770         {
771                 int new_picker = *(int *)addr;
772
773                 if (new_picker > (softc->sc_counts[CHET_MT] - 1))
774                         return (EINVAL);
775                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
776                 break;
777         }
778         case CHIOGPARAMS:
779         {
780                 struct changer_params *cp = (struct changer_params *)addr;
781
782                 cp->cp_npickers = softc->sc_counts[CHET_MT];
783                 cp->cp_nslots = softc->sc_counts[CHET_ST];
784                 cp->cp_nportals = softc->sc_counts[CHET_IE];
785                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
786                 break;
787         }
788         case CHIOIELEM:
789                 error = chielem(periph, *(unsigned int *)addr);
790                 break;
791
792         case CHIOGSTATUS:
793         {
794                 error = chgetelemstatus(periph,
795                                (struct changer_element_status_request *) addr);
796                 break;
797         }
798
799         case CHIOSETVOLTAG:
800         {
801                 error = chsetvoltag(periph,
802                                     (struct changer_set_voltag_request *) addr);
803                 break;
804         }
805
806         /* Implement prevent/allow? */
807
808         default:
809                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
810                 break;
811         }
812
813         return (error);
814 }
815
816 static int
817 chmove(struct cam_periph *periph, struct changer_move *cm)
818 {
819         struct ch_softc *softc;
820         u_int16_t fromelem, toelem;
821         union ccb *ccb;
822         int error;
823
824         error = 0;
825         softc = (struct ch_softc *)periph->softc;
826
827         /*
828          * Check arguments.
829          */
830         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
831                 return (EINVAL);
832         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
833             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
834                 return (ENODEV);
835
836         /*
837          * Check the request against the changer's capabilities.
838          */
839         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
840                 return (ENODEV);
841
842         /*
843          * Calculate the source and destination elements.
844          */
845         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
846         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
847
848         ccb = cam_periph_getccb(periph, /*priority*/ 1);
849
850         scsi_move_medium(&ccb->csio,
851                          /* retries */ 1,
852                          /* cbfcnp */ chdone,
853                          /* tag_action */ MSG_SIMPLE_Q_TAG,
854                          /* tea */ softc->sc_picker,
855                          /* src */ fromelem,
856                          /* dst */ toelem,
857                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
858                          /* sense_len */ SSD_FULL_SIZE,
859                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
860
861         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/0,
862                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
863                                   &softc->device_stats);
864
865         xpt_release_ccb(ccb);
866
867         return(error);
868 }
869
870 static int
871 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
872 {
873         struct ch_softc *softc;
874         u_int16_t src, dst1, dst2;
875         union ccb *ccb;
876         int error;
877
878         error = 0;
879         softc = (struct ch_softc *)periph->softc;
880         /*
881          * Check arguments.
882          */
883         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
884             (ce->ce_sdsttype > CHET_DT))
885                 return (EINVAL);
886         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
887             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
888             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
889                 return (ENODEV);
890
891         /*
892          * Check the request against the changer's capabilities.
893          */
894         if (((softc->sc_exchangemask[ce->ce_srctype] &
895              (1 << ce->ce_fdsttype)) == 0) ||
896             ((softc->sc_exchangemask[ce->ce_fdsttype] &
897              (1 << ce->ce_sdsttype)) == 0))
898                 return (ENODEV);
899
900         /*
901          * Calculate the source and destination elements.
902          */
903         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
904         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
905         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
906
907         ccb = cam_periph_getccb(periph, /*priority*/ 1);
908
909         scsi_exchange_medium(&ccb->csio,
910                              /* retries */ 1,
911                              /* cbfcnp */ chdone,
912                              /* tag_action */ MSG_SIMPLE_Q_TAG,
913                              /* tea */ softc->sc_picker,
914                              /* src */ src,
915                              /* dst1 */ dst1,
916                              /* dst2 */ dst2,
917                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
918                                            TRUE : FALSE,
919                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
920                                            TRUE : FALSE,
921                              /* sense_len */ SSD_FULL_SIZE,
922                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
923
924         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/0,
925                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
926                                   &softc->device_stats);
927
928         xpt_release_ccb(ccb);
929
930         return(error);
931 }
932
933 static int
934 chposition(struct cam_periph *periph, struct changer_position *cp)
935 {
936         struct ch_softc *softc;
937         u_int16_t dst;
938         union ccb *ccb;
939         int error;
940
941         error = 0;
942         softc = (struct ch_softc *)periph->softc;
943
944         /*
945          * Check arguments.
946          */
947         if (cp->cp_type > CHET_DT)
948                 return (EINVAL);
949         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
950                 return (ENODEV);
951
952         /*
953          * Calculate the destination element.
954          */
955         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
956
957         ccb = cam_periph_getccb(periph, /*priority*/ 1);
958
959         scsi_position_to_element(&ccb->csio,
960                                  /* retries */ 1,
961                                  /* cbfcnp */ chdone,
962                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
963                                  /* tea */ softc->sc_picker,
964                                  /* dst */ dst,
965                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
966                                               TRUE : FALSE,
967                                  /* sense_len */ SSD_FULL_SIZE,
968                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
969
970         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
971                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
972                                   &softc->device_stats);
973
974         xpt_release_ccb(ccb);
975
976         return(error);
977 }
978
979 /*
980  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
981  * to host native byte order in the volume serial number.  The volume
982  * label as returned by the changer is transferred to user mode as
983  * nul-terminated string.  Volume labels are truncated at the first
984  * space, as suggested by SCSI-2.
985  */
986 static  void
987 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
988 {
989         int i;
990         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
991                 char c = voltag->vif[i];
992                 if (c && c != ' ')
993                         uvoltag->cv_volid[i] = c;
994                 else
995                         break;
996         }
997         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
998 }
999
1000 /*
1001  * Copy an an element status descriptor to a user-mode
1002  * changer_element_status structure.
1003  */
1004
1005 static  void
1006 copy_element_status(struct ch_softc *softc,
1007                     u_int16_t flags,
1008                     struct read_element_status_descriptor *desc,
1009                     struct changer_element_status *ces)
1010 {
1011         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1012         u_int16_t et;
1013
1014         ces->ces_int_addr = eaddr;
1015         /* set up logical address in element status */
1016         for (et = CHET_MT; et <= CHET_DT; et++) {
1017                 if ((softc->sc_firsts[et] <= eaddr)
1018                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1019                         > eaddr)) {
1020                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1021                         ces->ces_type = et;
1022                         break;
1023                 }
1024         }
1025
1026         ces->ces_flags = desc->flags1;
1027
1028         ces->ces_sensecode = desc->sense_code;
1029         ces->ces_sensequal = desc->sense_qual;
1030
1031         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1032                 ces->ces_flags |= CES_INVERT;
1033
1034         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1035
1036                 eaddr = scsi_2btoul(desc->ssea);
1037
1038                 /* convert source address to logical format */
1039                 for (et = CHET_MT; et <= CHET_DT; et++) {
1040                         if ((softc->sc_firsts[et] <= eaddr)
1041                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1042                                 > eaddr)) {
1043                                 ces->ces_source_addr = 
1044                                         eaddr - softc->sc_firsts[et];
1045                                 ces->ces_source_type = et;
1046                                 ces->ces_flags |= CES_SOURCE_VALID;
1047                                 break;
1048                         }
1049                 }
1050
1051                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1052                         printf("ch: warning: could not map element source "
1053                                "address %ud to a valid element type\n",
1054                                eaddr);
1055         }
1056                         
1057
1058         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1059                 copy_voltag(&(ces->ces_pvoltag), &(desc->pvoltag));
1060         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1061                 copy_voltag(&(ces->ces_avoltag), &(desc->avoltag));
1062
1063         if (desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_IDVALID) {
1064                 ces->ces_flags |= CES_SCSIID_VALID;
1065                 ces->ces_scsi_id = desc->dt_scsi_addr;
1066         }
1067
1068         if (desc->dt_scsi_addr & READ_ELEMENT_STATUS_DT_LUVALID) {
1069                 ces->ces_flags |= CES_LUN_VALID;
1070                 ces->ces_scsi_lun = 
1071                         desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_LUNMASK;
1072         }
1073 }
1074
1075 static int
1076 chgetelemstatus(struct cam_periph *periph, 
1077                 struct changer_element_status_request *cesr)
1078 {
1079         struct read_element_status_header *st_hdr;
1080         struct read_element_status_page_header *pg_hdr;
1081         struct read_element_status_descriptor *desc;
1082         caddr_t data = NULL;
1083         size_t size, desclen;
1084         int avail, i, error = 0;
1085         struct changer_element_status *user_data = NULL;
1086         struct ch_softc *softc;
1087         union ccb *ccb;
1088         int chet = cesr->cesr_element_type;
1089         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1090
1091         softc = (struct ch_softc *)periph->softc;
1092
1093         /* perform argument checking */
1094
1095         /*
1096          * Perform a range check on the cesr_element_{base,count}
1097          * request argument fields.
1098          */
1099         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1100             || (cesr->cesr_element_base + cesr->cesr_element_count)
1101                 > softc->sc_counts[chet])
1102                 return (EINVAL);
1103
1104         /*
1105          * Request one descriptor for the given element type.  This
1106          * is used to determine the size of the descriptor so that
1107          * we can allocate enough storage for all of them.  We assume
1108          * that the first one can fit into 1k.
1109          */
1110         data = (caddr_t)malloc(1024, M_DEVBUF, M_INTWAIT);
1111
1112         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1113
1114         scsi_read_element_status(&ccb->csio,
1115                                  /* retries */ 1,
1116                                  /* cbfcnp */ chdone,
1117                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1118                                  /* voltag */ want_voltags,
1119                                  /* sea */ softc->sc_firsts[chet],
1120                                  /* count */ 1,
1121                                  /* data_ptr */ data,
1122                                  /* dxfer_len */ 1024,
1123                                  /* sense_len */ SSD_FULL_SIZE,
1124                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1125
1126         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1127                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1128                                   &softc->device_stats);
1129
1130         if (error)
1131                 goto done;
1132
1133         st_hdr = (struct read_element_status_header *)data;
1134         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1135                   sizeof(struct read_element_status_header));
1136         desclen = scsi_2btoul(pg_hdr->edl);
1137
1138         size = sizeof(struct read_element_status_header) +
1139                sizeof(struct read_element_status_page_header) +
1140                (desclen * cesr->cesr_element_count);
1141
1142         /*
1143          * Reallocate storage for descriptors and get them from the
1144          * device.
1145          */
1146         free(data, M_DEVBUF);
1147         data = (caddr_t)malloc(size, M_DEVBUF, M_INTWAIT);
1148
1149         scsi_read_element_status(&ccb->csio,
1150                                  /* retries */ 1,
1151                                  /* cbfcnp */ chdone,
1152                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1153                                  /* voltag */ want_voltags,
1154                                  /* sea */ softc->sc_firsts[chet]
1155                                  + cesr->cesr_element_base,
1156                                  /* count */ cesr->cesr_element_count,
1157                                  /* data_ptr */ data,
1158                                  /* dxfer_len */ size,
1159                                  /* sense_len */ SSD_FULL_SIZE,
1160                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1161         
1162         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1163                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1164                                   &softc->device_stats);
1165
1166         if (error)
1167                 goto done;
1168
1169         /*
1170          * Fill in the user status array.
1171          */
1172         st_hdr = (struct read_element_status_header *)data;
1173         avail = scsi_2btoul(st_hdr->count);
1174
1175         if (avail != cesr->cesr_element_count) {
1176                 xpt_print_path(periph->path);
1177                 printf("warning, READ ELEMENT STATUS avail != count\n");
1178         }
1179
1180         user_data = (struct changer_element_status *)
1181                 malloc(avail * sizeof(struct changer_element_status),
1182                        M_DEVBUF, M_INTWAIT | M_ZERO);
1183
1184         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1185                 sizeof(struct read_element_status_header) +
1186                 sizeof(struct read_element_status_page_header));
1187         /*
1188          * Set up the individual element status structures
1189          */
1190         for (i = 0; i < avail; ++i) {
1191                 struct changer_element_status *ces = &(user_data[i]);
1192
1193                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1194
1195                 desc = (struct read_element_status_descriptor *)
1196                        ((uintptr_t)desc + desclen);
1197         }
1198
1199         /* Copy element status structures out to userspace. */
1200         error = copyout(user_data,
1201                         cesr->cesr_element_status,
1202                         avail * sizeof(struct changer_element_status));
1203
1204  done:
1205         xpt_release_ccb(ccb);
1206
1207         if (data != NULL)
1208                 free(data, M_DEVBUF);
1209         if (user_data != NULL)
1210                 free(user_data, M_DEVBUF);
1211
1212         return (error);
1213 }
1214
1215 static int
1216 chielem(struct cam_periph *periph,
1217         unsigned int timeout)
1218 {
1219         union ccb *ccb;
1220         struct ch_softc *softc;
1221         int error;
1222
1223         if (!timeout) {
1224                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1225         } else {
1226                 timeout *= 1000;
1227         }
1228
1229         error = 0;
1230         softc = (struct ch_softc *)periph->softc;
1231
1232         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1233
1234         scsi_initialize_element_status(&ccb->csio,
1235                                       /* retries */ 1,
1236                                       /* cbfcnp */ chdone,
1237                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1238                                       /* sense_len */ SSD_FULL_SIZE,
1239                                       /* timeout */ timeout);
1240
1241         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1242                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1243                                   &softc->device_stats);
1244
1245         xpt_release_ccb(ccb);
1246
1247         return(error);
1248 }
1249
1250 static int
1251 chsetvoltag(struct cam_periph *periph,
1252             struct changer_set_voltag_request *csvr)
1253 {
1254         union ccb *ccb;
1255         struct ch_softc *softc;
1256         u_int16_t ea;
1257         u_int8_t sac;
1258         struct scsi_send_volume_tag_parameters ssvtp;
1259         int error;
1260         int i;
1261
1262         error = 0;
1263         softc = (struct ch_softc *)periph->softc;
1264
1265         bzero(&ssvtp, sizeof(ssvtp));
1266         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1267                 ssvtp.vitf[i] = ' ';
1268         }
1269
1270         /*
1271          * Check arguments.
1272          */
1273         if (csvr->csvr_type > CHET_DT)
1274                 return EINVAL;
1275         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1276                 return ENODEV;
1277
1278         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1279
1280         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1281                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1282                 case CSVR_MODE_SET:
1283                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1284                         break;
1285                 case CSVR_MODE_REPLACE:
1286                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1287                         break;
1288                 case CSVR_MODE_CLEAR:
1289                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1290                         break;
1291                 default:
1292                         error = EINVAL;
1293                         goto out;
1294                 }
1295         } else {
1296                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1297                 case CSVR_MODE_SET:
1298                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1299                         break;
1300                 case CSVR_MODE_REPLACE:
1301                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1302                         break;
1303                 case CSVR_MODE_CLEAR:
1304                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1305                         break;
1306                 default:
1307                         error = EINVAL;
1308                         goto out;
1309                 }
1310         }
1311
1312         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1313                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1314         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1315
1316         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1317
1318         scsi_send_volume_tag(&ccb->csio,
1319                              /* retries */ 1,
1320                              /* cbfcnp */ chdone,
1321                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1322                              /* element_address */ ea,
1323                              /* send_action_code */ sac,
1324                              /* parameters */ &ssvtp,
1325                              /* sense_len */ SSD_FULL_SIZE,
1326                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1327         
1328         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1329                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1330                                   &softc->device_stats);
1331
1332         xpt_release_ccb(ccb);
1333
1334  out:
1335         return error;
1336 }
1337
1338 static int
1339 chgetparams(struct cam_periph *periph)
1340 {
1341         union ccb *ccb;
1342         struct ch_softc *softc;
1343         void *mode_buffer;
1344         int mode_buffer_len;
1345         struct page_element_address_assignment *ea;
1346         struct page_device_capabilities *cap;
1347         int error, from, dbd;
1348         u_int8_t *moves, *exchanges;
1349
1350         error = 0;
1351
1352         softc = (struct ch_softc *)periph->softc;
1353
1354         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1355
1356         /*
1357          * The scsi_mode_sense_data structure is just a convenience
1358          * structure that allows us to easily calculate the worst-case
1359          * storage size of the mode sense buffer.
1360          */
1361         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1362
1363         mode_buffer = malloc(mode_buffer_len, M_TEMP, M_INTWAIT | M_ZERO);
1364
1365         if (softc->quirks & CH_Q_NO_DBD)
1366                 dbd = FALSE;
1367         else
1368                 dbd = TRUE;
1369
1370         /*
1371          * Get the element address assignment page.
1372          */
1373         scsi_mode_sense(&ccb->csio,
1374                         /* retries */ 1,
1375                         /* cbfcnp */ chdone,
1376                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1377                         /* dbd */ dbd,
1378                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1379                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1380                         /* param_buf */ (u_int8_t *)mode_buffer,
1381                         /* param_len */ mode_buffer_len,
1382                         /* sense_len */ SSD_FULL_SIZE,
1383                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1384
1385         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1386                                   /* sense_flags */ SF_RETRY_UA |
1387                                   SF_NO_PRINT | SF_RETRY_SELTO,
1388                                   &softc->device_stats);
1389
1390         if (error) {
1391                 if (dbd) {
1392                         struct scsi_mode_sense_6 *sms;
1393
1394                         sms = (struct scsi_mode_sense_6 *)
1395                                 ccb->csio.cdb_io.cdb_bytes;
1396
1397                         sms->byte2 &= ~SMS_DBD;
1398                         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1399                                                   /*sense_flags*/ SF_RETRY_UA |
1400                                                   SF_RETRY_SELTO,
1401                                                   &softc->device_stats);
1402                 } else {
1403                         /*
1404                          * Since we disabled sense printing above, print
1405                          * out the sense here since we got an error.
1406                          */
1407                         scsi_sense_print(&ccb->csio);
1408                 }
1409
1410                 if (error) {
1411                         xpt_print_path(periph->path);
1412                         printf("chgetparams: error getting element "
1413                                "address page\n");
1414                         xpt_release_ccb(ccb);
1415                         free(mode_buffer, M_TEMP);
1416                         return(error);
1417                 }
1418         }
1419
1420         ea = (struct page_element_address_assignment *)
1421                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1422
1423         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1424         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1425         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1426         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1427         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1428         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1429         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1430         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1431
1432         bzero(mode_buffer, mode_buffer_len);
1433
1434         /*
1435          * Now get the device capabilities page.
1436          */
1437         scsi_mode_sense(&ccb->csio,
1438                         /* retries */ 1,
1439                         /* cbfcnp */ chdone,
1440                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1441                         /* dbd */ dbd,
1442                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1443                         /* page */ CH_DEVICE_CAP_PAGE,
1444                         /* param_buf */ (u_int8_t *)mode_buffer,
1445                         /* param_len */ mode_buffer_len,
1446                         /* sense_len */ SSD_FULL_SIZE,
1447                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1448         
1449         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1450                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT |
1451                                   SF_RETRY_SELTO, &softc->device_stats);
1452
1453         if (error) {
1454                 if (dbd) {
1455                         struct scsi_mode_sense_6 *sms;
1456
1457                         sms = (struct scsi_mode_sense_6 *)
1458                                 ccb->csio.cdb_io.cdb_bytes;
1459
1460                         sms->byte2 &= ~SMS_DBD;
1461                         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1462                                                   /*sense_flags*/ SF_RETRY_UA |
1463                                                   SF_RETRY_SELTO,
1464                                                   &softc->device_stats);
1465                 } else {
1466                         /*
1467                          * Since we disabled sense printing above, print
1468                          * out the sense here since we got an error.
1469                          */
1470                         scsi_sense_print(&ccb->csio);
1471                 }
1472
1473                 if (error) {
1474                         xpt_print_path(periph->path);
1475                         printf("chgetparams: error getting device "
1476                                "capabilities page\n");
1477                         xpt_release_ccb(ccb);
1478                         free(mode_buffer, M_TEMP);
1479                         return(error);
1480                 }
1481         }
1482
1483         xpt_release_ccb(ccb);
1484
1485         cap = (struct page_device_capabilities *)
1486                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1487
1488         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1489         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1490         moves = &cap->move_from_mt;
1491         exchanges = &cap->exchange_with_mt;
1492         for (from = CHET_MT; from <= CHET_DT; ++from) {
1493                 softc->sc_movemask[from] = moves[from];
1494                 softc->sc_exchangemask[from] = exchanges[from];
1495         }
1496
1497         free(mode_buffer, M_TEMP);
1498
1499         return(error);
1500 }
1501
1502 void
1503 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1504                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1505                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1506                  u_int32_t dst, int invert, u_int8_t sense_len,
1507                  u_int32_t timeout)
1508 {
1509         struct scsi_move_medium *scsi_cmd;
1510
1511         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1512         bzero(scsi_cmd, sizeof(*scsi_cmd));
1513
1514         scsi_cmd->opcode = MOVE_MEDIUM;
1515
1516         scsi_ulto2b(tea, scsi_cmd->tea);
1517         scsi_ulto2b(src, scsi_cmd->src);
1518         scsi_ulto2b(dst, scsi_cmd->dst);
1519
1520         if (invert)
1521                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1522
1523         cam_fill_csio(csio,
1524                       retries,
1525                       cbfcnp,
1526                       /*flags*/ CAM_DIR_NONE,
1527                       tag_action,
1528                       /*data_ptr*/ NULL,
1529                       /*dxfer_len*/ 0,
1530                       sense_len,
1531                       sizeof(*scsi_cmd),
1532                       timeout);
1533 }
1534
1535 void
1536 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1537                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1538                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1539                      u_int32_t dst1, u_int32_t dst2, int invert1,
1540                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1541 {
1542         struct scsi_exchange_medium *scsi_cmd;
1543
1544         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1545         bzero(scsi_cmd, sizeof(*scsi_cmd));
1546
1547         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1548
1549         scsi_ulto2b(tea, scsi_cmd->tea);
1550         scsi_ulto2b(src, scsi_cmd->src);
1551         scsi_ulto2b(dst1, scsi_cmd->fdst);
1552         scsi_ulto2b(dst2, scsi_cmd->sdst);
1553
1554         if (invert1)
1555                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1556
1557         if (invert2)
1558                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1559
1560         cam_fill_csio(csio,
1561                       retries,
1562                       cbfcnp,
1563                       /*flags*/ CAM_DIR_NONE,
1564                       tag_action,
1565                       /*data_ptr*/ NULL,
1566                       /*dxfer_len*/ 0,
1567                       sense_len,
1568                       sizeof(*scsi_cmd),
1569                       timeout);
1570 }
1571
1572 void
1573 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1574                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1575                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1576                          int invert, u_int8_t sense_len, u_int32_t timeout)
1577 {
1578         struct scsi_position_to_element *scsi_cmd;
1579
1580         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1581         bzero(scsi_cmd, sizeof(*scsi_cmd));
1582
1583         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1584
1585         scsi_ulto2b(tea, scsi_cmd->tea);
1586         scsi_ulto2b(dst, scsi_cmd->dst);
1587
1588         if (invert)
1589                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1590
1591         cam_fill_csio(csio,
1592                       retries,
1593                       cbfcnp,
1594                       /*flags*/ CAM_DIR_NONE,
1595                       tag_action,
1596                       /*data_ptr*/ NULL,
1597                       /*dxfer_len*/ 0,
1598                       sense_len,
1599                       sizeof(*scsi_cmd),
1600                       timeout);
1601 }
1602
1603 void
1604 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1605                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1606                          u_int8_t tag_action, int voltag, u_int32_t sea,
1607                          u_int32_t count, u_int8_t *data_ptr,
1608                          u_int32_t dxfer_len, u_int8_t sense_len,
1609                          u_int32_t timeout)
1610 {
1611         struct scsi_read_element_status *scsi_cmd;
1612
1613         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1614         bzero(scsi_cmd, sizeof(*scsi_cmd));
1615
1616         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1617
1618         scsi_ulto2b(sea, scsi_cmd->sea);
1619         scsi_ulto2b(count, scsi_cmd->count);
1620         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1621
1622         if (voltag)
1623                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1624
1625         cam_fill_csio(csio,
1626                       retries,
1627                       cbfcnp,
1628                       /*flags*/ CAM_DIR_IN,
1629                       tag_action,
1630                       data_ptr,
1631                       dxfer_len,
1632                       sense_len,
1633                       sizeof(*scsi_cmd),
1634                       timeout);
1635 }
1636
1637 void
1638 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1639                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1640                                u_int8_t tag_action, u_int8_t sense_len,
1641                                u_int32_t timeout)
1642 {
1643         struct scsi_initialize_element_status *scsi_cmd;
1644
1645         scsi_cmd = (struct scsi_initialize_element_status *)
1646                     &csio->cdb_io.cdb_bytes;
1647         bzero(scsi_cmd, sizeof(*scsi_cmd));
1648
1649         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1650
1651         cam_fill_csio(csio,
1652                       retries,
1653                       cbfcnp,
1654                       /*flags*/ CAM_DIR_NONE,
1655                       tag_action,
1656                       /* data_ptr */ NULL,
1657                       /* dxfer_len */ 0,
1658                       sense_len,
1659                       sizeof(*scsi_cmd),
1660                       timeout);
1661 }
1662
1663 void
1664 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1665                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1666                      u_int8_t tag_action, 
1667                      u_int16_t element_address,
1668                      u_int8_t send_action_code,
1669                      struct scsi_send_volume_tag_parameters *parameters,
1670                      u_int8_t sense_len, u_int32_t timeout)
1671 {
1672         struct scsi_send_volume_tag *scsi_cmd;
1673
1674         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1675         bzero(scsi_cmd, sizeof(*scsi_cmd));
1676
1677         scsi_cmd->opcode = SEND_VOLUME_TAG;
1678         scsi_ulto2b(element_address, scsi_cmd->ea);
1679         scsi_cmd->sac = send_action_code;
1680         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1681
1682         cam_fill_csio(csio,
1683                       retries,
1684                       cbfcnp,
1685                       /*flags*/ CAM_DIR_OUT,
1686                       tag_action,
1687                       /* data_ptr */ (u_int8_t *) parameters,
1688                       sizeof(*parameters),
1689                       sense_len,
1690                       sizeof(*scsi_cmd),
1691                       timeout);
1692 }