8d28d06fc2537f1044e2d1015d9c6d06a339dfd4
[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 1.18 2006/12/20 18:14:34 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_bio         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 dev_ops ch_ops = {
219         { "ch", CH_CDEV_MAJOR, 0 },
220         .d_open = chopen,
221         .d_close = chclose,
222         .d_ioctl = chioctl
223 };
224
225 static struct extend_array *chperiphs;
226
227 void
228 chinit(void)
229 {
230         cam_status status;
231         struct cam_path *path;
232
233         /*
234          * Create our extend array for storing the devices we attach to.
235          */
236         chperiphs = cam_extend_new();
237         if (chperiphs == NULL) {
238                 printf("ch: Failed to alloc extend array!\n");
239                 return;
240         }
241
242         /*
243          * Install a global async callback.  This callback will
244          * receive async callbacks like "new device found".
245          */
246         status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
247                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
248
249         if (status == CAM_REQ_CMP) {
250                 struct ccb_setasync csa;
251
252                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
253                 csa.ccb_h.func_code = XPT_SASYNC_CB;
254                 csa.event_enable = AC_FOUND_DEVICE;
255                 csa.callback = chasync;
256                 csa.callback_arg = NULL;
257                 xpt_action((union ccb *)&csa);
258                 status = csa.ccb_h.status;
259                 xpt_free_path(path);
260         }
261
262         if (status != CAM_REQ_CMP) {
263                 printf("ch: Failed to attach master async callback "
264                        "due to status 0x%x!\n", status);
265         }
266 }
267
268 static void
269 choninvalidate(struct cam_periph *periph)
270 {
271         struct ch_softc *softc;
272         struct ccb_setasync csa;
273
274         softc = (struct ch_softc *)periph->softc;
275
276         /*
277          * De-register any async callbacks.
278          */
279         xpt_setup_ccb(&csa.ccb_h, periph->path,
280                       /* priority */ 5);
281         csa.ccb_h.func_code = XPT_SASYNC_CB;
282         csa.event_enable = 0;
283         csa.callback = chasync;
284         csa.callback_arg = periph;
285         xpt_action((union ccb *)&csa);
286
287         softc->flags |= CH_FLAG_INVALID;
288
289         xpt_print_path(periph->path);
290         printf("lost device\n");
291
292 }
293
294 static void
295 chcleanup(struct cam_periph *periph)
296 {
297         struct ch_softc *softc;
298
299         softc = (struct ch_softc *)periph->softc;
300
301         devstat_remove_entry(&softc->device_stats);
302         cam_extend_release(chperiphs, periph->unit_number);
303         xpt_print_path(periph->path);
304         printf("removing device entry\n");
305         dev_ops_remove(&ch_ops, -1, periph->unit_number);
306         kfree(softc, M_DEVBUF);
307 }
308
309 static void
310 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
311 {
312         struct cam_periph *periph;
313
314         periph = (struct cam_periph *)callback_arg;
315
316         switch(code) {
317         case AC_FOUND_DEVICE:
318         {
319                 struct ccb_getdev *cgd;
320                 cam_status status;
321
322                 cgd = (struct ccb_getdev *)arg;
323
324                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
325                         break;
326
327                 /*
328                  * Allocate a peripheral instance for
329                  * this device and start the probe
330                  * process.
331                  */
332                 status = cam_periph_alloc(chregister, choninvalidate,
333                                           chcleanup, chstart, "ch",
334                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
335                                           chasync, AC_FOUND_DEVICE, cgd);
336
337                 if (status != CAM_REQ_CMP
338                  && status != CAM_REQ_INPROG)
339                         printf("chasync: Unable to probe new device "
340                                "due to status 0x%x\n", status);
341
342                 break;
343
344         }
345         default:
346                 cam_periph_async(periph, code, path, arg);
347                 break;
348         }
349 }
350
351 static cam_status
352 chregister(struct cam_periph *periph, void *arg)
353 {
354         struct ch_softc *softc;
355         struct ccb_setasync csa;
356         struct ccb_getdev *cgd;
357
358         cgd = (struct ccb_getdev *)arg;
359         if (periph == NULL) {
360                 printf("chregister: periph was NULL!!\n");
361                 return(CAM_REQ_CMP_ERR);
362         }
363
364         if (cgd == NULL) {
365                 printf("chregister: no getdev CCB, can't register device\n");
366                 return(CAM_REQ_CMP_ERR);
367         }
368
369         softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
370         softc->state = CH_STATE_PROBE;
371         periph->softc = softc;
372         cam_extend_set(chperiphs, periph->unit_number, periph);
373         softc->quirks = CH_Q_NONE;
374
375         /*
376          * Changers don't have a blocksize, and obviously don't support
377          * tagged queueing.
378          */
379         devstat_add_entry(&softc->device_stats, "ch",
380                           periph->unit_number, 0,
381                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
382                           SID_TYPE(&cgd->inq_data)| DEVSTAT_TYPE_IF_SCSI,
383                           DEVSTAT_PRIORITY_OTHER);
384
385         /* Register the device */
386         dev_ops_add(&ch_ops, -1, periph->unit_number);
387         make_dev(&ch_ops, periph->unit_number, UID_ROOT,
388                   GID_OPERATOR, 0600, "%s%d", periph->periph_name,
389                   periph->unit_number);
390
391         /*
392          * Add an async callback so that we get
393          * notified if this device goes away.
394          */
395         xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5);
396         csa.ccb_h.func_code = XPT_SASYNC_CB;
397         csa.event_enable = AC_LOST_DEVICE;
398         csa.callback = chasync;
399         csa.callback_arg = periph;
400         xpt_action((union ccb *)&csa);
401
402         /*
403          * Lock this peripheral until we are setup.
404          * This first call can't block
405          */
406         cam_periph_lock(periph, 0);
407         xpt_schedule(periph, /*priority*/5);
408
409         return(CAM_REQ_CMP);
410 }
411
412 static int
413 chopen(struct dev_open_args *ap)
414 {
415         cdev_t dev = ap->a_head.a_dev;
416         struct cam_periph *periph;
417         struct ch_softc *softc;
418         int unit, error;
419
420         unit = CHUNIT(dev);
421         periph = cam_extend_get(chperiphs, unit);
422
423         if (periph == NULL)
424                 return(ENXIO);
425
426         softc = (struct ch_softc *)periph->softc;
427
428         crit_enter();
429         if (softc->flags & CH_FLAG_INVALID) {
430                 crit_exit();
431                 return(ENXIO);
432         }
433
434         if ((error = cam_periph_lock(periph, PCATCH)) != 0) {
435                 crit_exit();
436                 return (error);
437         }
438         
439         crit_exit();
440
441         if ((softc->flags & CH_FLAG_OPEN) == 0) {
442                 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
443                         return(ENXIO);
444                 softc->flags |= CH_FLAG_OPEN;
445         }
446
447         /*
448          * Load information about this changer device into the softc.
449          */
450         if ((error = chgetparams(periph)) != 0) {
451                 softc->flags &= ~CH_FLAG_OPEN;
452                 cam_periph_unlock(periph);
453                 cam_periph_release(periph);
454                 return(error);
455         }
456
457         cam_periph_unlock(periph);
458
459         return(error);
460 }
461
462 static int
463 chclose(struct dev_close_args *ap)
464 {
465         cdev_t dev = ap->a_head.a_dev;
466         struct  cam_periph *periph;
467         struct  ch_softc *softc;
468         int     unit, error;
469
470         error = 0;
471
472         unit = CHUNIT(dev);
473         periph = cam_extend_get(chperiphs, unit);
474         if (periph == NULL)
475                 return(ENXIO);
476
477         softc = (struct ch_softc *)periph->softc;
478
479         if ((error = cam_periph_lock(periph, 0)) != 0)
480                 return(error);
481
482         softc->flags &= ~CH_FLAG_OPEN;
483
484         cam_periph_unlock(periph);
485         cam_periph_release(periph);
486
487         return(0);
488 }
489
490 static void
491 chstart(struct cam_periph *periph, union ccb *start_ccb)
492 {
493         struct ch_softc *softc;
494
495         softc = (struct ch_softc *)periph->softc;
496
497         switch (softc->state) {
498         case CH_STATE_NORMAL:
499         {
500                 crit_enter();
501                 if (periph->immediate_priority <= periph->pinfo.priority){
502                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
503
504                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
505                                           periph_links.sle);
506                         periph->immediate_priority = CAM_PRIORITY_NONE;
507                         wakeup(&periph->ccb_list);
508                 }
509                 crit_exit();
510                 break;
511         }
512         case CH_STATE_PROBE:
513         {
514                 int mode_buffer_len;
515                 void *mode_buffer;
516
517                 /*
518                  * Include the block descriptor when calculating the mode
519                  * buffer length,
520                  */
521                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
522                                   sizeof(struct scsi_mode_blk_desc) +
523                                  sizeof(struct page_element_address_assignment);
524
525                 mode_buffer = kmalloc(mode_buffer_len, M_TEMP, M_INTWAIT | M_ZERO);
526                 /*
527                  * Get the element address assignment page.
528                  */
529                 scsi_mode_sense(&start_ccb->csio,
530                                 /* retries */ 1,
531                                 /* cbfcnp */ chdone,
532                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
533                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
534                                         FALSE : TRUE,
535                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
536                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
537                                 /* param_buf */ (u_int8_t *)mode_buffer,
538                                 /* param_len */ mode_buffer_len,
539                                 /* sense_len */ SSD_FULL_SIZE,
540                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
541
542                 start_ccb->ccb_h.ccb_bio = NULL;
543                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
544                 xpt_action(start_ccb);
545                 break;
546         }
547         }
548 }
549
550 static void
551 chdone(struct cam_periph *periph, union ccb *done_ccb)
552 {
553         struct ch_softc *softc;
554         struct ccb_scsiio *csio;
555
556         softc = (struct ch_softc *)periph->softc;
557         csio = &done_ccb->csio;
558
559         switch(done_ccb->ccb_h.ccb_state) {
560         case CH_CCB_PROBE:
561         {
562                 struct scsi_mode_header_6 *mode_header;
563                 struct page_element_address_assignment *ea;
564                 char announce_buf[80];
565
566
567                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
568
569                 ea = (struct page_element_address_assignment *)
570                         find_mode_page_6(mode_header);
571
572                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
573                         
574                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
575                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
576                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
577                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
578                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
579                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
580                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
581                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
582                         softc->sc_picker = softc->sc_firsts[CHET_MT];
583
584 #define PLURAL(c)       (c) == 1 ? "" : "s"
585                         ksnprintf(announce_buf, sizeof(announce_buf),
586                                 "%d slot%s, %d drive%s, "
587                                 "%d picker%s, %d portal%s",
588                                 softc->sc_counts[CHET_ST],
589                                 PLURAL(softc->sc_counts[CHET_ST]),
590                                 softc->sc_counts[CHET_DT],
591                                 PLURAL(softc->sc_counts[CHET_DT]),
592                                 softc->sc_counts[CHET_MT],
593                                 PLURAL(softc->sc_counts[CHET_MT]),
594                                 softc->sc_counts[CHET_IE],
595                                 PLURAL(softc->sc_counts[CHET_IE]));
596 #undef PLURAL
597                 } else {
598                         int error;
599
600                         error = cherror(done_ccb, 0, SF_RETRY_UA |
601                                         SF_NO_PRINT | SF_RETRY_SELTO);
602                         /*
603                          * Retry any UNIT ATTENTION type errors.  They
604                          * are expected at boot.
605                          */
606                         if (error == ERESTART) {
607                                 /*
608                                  * A retry was scheuled, so
609                                  * just return.
610                                  */
611                                 return;
612                         } else if (error != 0) {
613                                 int retry_scheduled;
614                                 struct scsi_mode_sense_6 *sms;
615
616                                 sms = (struct scsi_mode_sense_6 *)
617                                         done_ccb->csio.cdb_io.cdb_bytes;
618
619                                 /*
620                                  * Check to see if block descriptors were
621                                  * disabled.  Some devices don't like that.
622                                  * We're taking advantage of the fact that
623                                  * the first few bytes of the 6 and 10 byte
624                                  * mode sense commands are the same.  If
625                                  * block descriptors were disabled, enable
626                                  * them and re-send the command.
627                                  */
628                                 if (sms->byte2 & SMS_DBD) {
629                                         sms->byte2 &= ~SMS_DBD;
630                                         xpt_action(done_ccb);
631                                         softc->quirks |= CH_Q_NO_DBD;
632                                         retry_scheduled = 1;
633                                 } else
634                                         retry_scheduled = 0;
635
636                                 /* Don't wedge this device's queue */
637                                 cam_release_devq(done_ccb->ccb_h.path,
638                                                  /*relsim_flags*/0,
639                                                  /*reduction*/0,
640                                                  /*timeout*/0,
641                                                  /*getcount_only*/0);
642
643                                 if (retry_scheduled)
644                                         return;
645
646                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
647                                     == CAM_SCSI_STATUS_ERROR) 
648                                         scsi_sense_print(&done_ccb->csio);
649                                 else {
650                                         xpt_print_path(periph->path);
651                                         printf("got CAM status %#x\n",
652                                                done_ccb->ccb_h.status);
653                                 }
654                                 xpt_print_path(periph->path);
655                                 printf("fatal error, failed to attach to"
656                                        " device\n");
657
658                                 cam_periph_invalidate(periph);
659
660                                 announce_buf[0] = '\0';
661                         }
662                 }
663                 if (announce_buf[0] != '\0')
664                         xpt_announce_periph(periph, announce_buf);
665                 softc->state = CH_STATE_NORMAL;
666                 kfree(mode_header, M_TEMP);
667                 /*
668                  * Since our peripheral may be invalidated by an error
669                  * above or an external event, we must release our CCB
670                  * before releasing the probe lock on the peripheral.
671                  * The peripheral will only go away once the last lock
672                  * is removed, and we need it around for the CCB release
673                  * operation.
674                  */
675                 xpt_release_ccb(done_ccb);
676                 cam_periph_unlock(periph);
677                 return;
678         }
679         case CH_CCB_WAITING:
680         {
681                 /* Caller will release the CCB */
682                 wakeup(&done_ccb->ccb_h.cbfcnp);
683                 return;
684         }
685         default:
686                 break;
687         }
688         xpt_release_ccb(done_ccb);
689 }
690
691 static int
692 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
693 {
694         struct ch_softc *softc;
695         struct cam_periph *periph;
696
697         periph = xpt_path_periph(ccb->ccb_h.path);
698         softc = (struct ch_softc *)periph->softc;
699
700         return (cam_periph_error(ccb, cam_flags, sense_flags,
701                                  &softc->saved_ccb));
702 }
703
704 static int
705 chioctl(struct dev_ioctl_args *ap)
706 {
707         cdev_t dev = ap->a_head.a_dev;
708         caddr_t addr = ap->a_data;
709         int flag = ap->a_fflag;
710         struct cam_periph *periph;
711         struct ch_softc *softc;
712         u_int8_t unit;
713         int error;
714
715         unit = CHUNIT(dev);
716
717         periph = cam_extend_get(chperiphs, unit);
718         if (periph == NULL)
719                 return(ENXIO);
720
721         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
722
723         softc = (struct ch_softc *)periph->softc;
724
725         error = 0;
726
727         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 
728                   ("trying to do ioctl %#lx\n", ap->a_cmd));
729
730         /*
731          * If this command can change the device's state, we must
732          * have the device open for writing.
733          */
734         switch (ap->a_cmd) {
735         case CHIOGPICKER:
736         case CHIOGPARAMS:
737         case CHIOGSTATUS:
738                 break;
739
740         default:
741                 if ((flag & FWRITE) == 0)
742                         return (EBADF);
743         }
744
745         switch (ap->a_cmd) {
746         case CHIOMOVE:
747                 error = chmove(periph, (struct changer_move *)addr);
748                 break;
749
750         case CHIOEXCHANGE:
751                 error = chexchange(periph, (struct changer_exchange *)addr);
752                 break;
753
754         case CHIOPOSITION:
755                 error = chposition(periph, (struct changer_position *)addr);
756                 break;
757
758         case CHIOGPICKER:
759                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
760                 break;
761
762         case CHIOSPICKER:
763         {
764                 int new_picker = *(int *)addr;
765
766                 if (new_picker > (softc->sc_counts[CHET_MT] - 1))
767                         return (EINVAL);
768                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
769                 break;
770         }
771         case CHIOGPARAMS:
772         {
773                 struct changer_params *cp = (struct changer_params *)addr;
774
775                 cp->cp_npickers = softc->sc_counts[CHET_MT];
776                 cp->cp_nslots = softc->sc_counts[CHET_ST];
777                 cp->cp_nportals = softc->sc_counts[CHET_IE];
778                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
779                 break;
780         }
781         case CHIOIELEM:
782                 error = chielem(periph, *(unsigned int *)addr);
783                 break;
784
785         case CHIOGSTATUS:
786         {
787                 error = chgetelemstatus(periph,
788                                (struct changer_element_status_request *) addr);
789                 break;
790         }
791
792         case CHIOSETVOLTAG:
793         {
794                 error = chsetvoltag(periph,
795                                     (struct changer_set_voltag_request *) addr);
796                 break;
797         }
798
799         /* Implement prevent/allow? */
800
801         default:
802                 error = cam_periph_ioctl(periph, ap->a_cmd, addr, cherror);
803                 break;
804         }
805
806         return (error);
807 }
808
809 static int
810 chmove(struct cam_periph *periph, struct changer_move *cm)
811 {
812         struct ch_softc *softc;
813         u_int16_t fromelem, toelem;
814         union ccb *ccb;
815         int error;
816
817         error = 0;
818         softc = (struct ch_softc *)periph->softc;
819
820         /*
821          * Check arguments.
822          */
823         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
824                 return (EINVAL);
825         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
826             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
827                 return (ENODEV);
828
829         /*
830          * Check the request against the changer's capabilities.
831          */
832         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
833                 return (ENODEV);
834
835         /*
836          * Calculate the source and destination elements.
837          */
838         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
839         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
840
841         ccb = cam_periph_getccb(periph, /*priority*/ 1);
842
843         scsi_move_medium(&ccb->csio,
844                          /* retries */ 1,
845                          /* cbfcnp */ chdone,
846                          /* tag_action */ MSG_SIMPLE_Q_TAG,
847                          /* tea */ softc->sc_picker,
848                          /* src */ fromelem,
849                          /* dst */ toelem,
850                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
851                          /* sense_len */ SSD_FULL_SIZE,
852                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
853
854         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/0,
855                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
856                                   &softc->device_stats);
857
858         xpt_release_ccb(ccb);
859
860         return(error);
861 }
862
863 static int
864 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
865 {
866         struct ch_softc *softc;
867         u_int16_t src, dst1, dst2;
868         union ccb *ccb;
869         int error;
870
871         error = 0;
872         softc = (struct ch_softc *)periph->softc;
873         /*
874          * Check arguments.
875          */
876         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
877             (ce->ce_sdsttype > CHET_DT))
878                 return (EINVAL);
879         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
880             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
881             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
882                 return (ENODEV);
883
884         /*
885          * Check the request against the changer's capabilities.
886          */
887         if (((softc->sc_exchangemask[ce->ce_srctype] &
888              (1 << ce->ce_fdsttype)) == 0) ||
889             ((softc->sc_exchangemask[ce->ce_fdsttype] &
890              (1 << ce->ce_sdsttype)) == 0))
891                 return (ENODEV);
892
893         /*
894          * Calculate the source and destination elements.
895          */
896         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
897         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
898         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
899
900         ccb = cam_periph_getccb(periph, /*priority*/ 1);
901
902         scsi_exchange_medium(&ccb->csio,
903                              /* retries */ 1,
904                              /* cbfcnp */ chdone,
905                              /* tag_action */ MSG_SIMPLE_Q_TAG,
906                              /* tea */ softc->sc_picker,
907                              /* src */ src,
908                              /* dst1 */ dst1,
909                              /* dst2 */ dst2,
910                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
911                                            TRUE : FALSE,
912                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
913                                            TRUE : FALSE,
914                              /* sense_len */ SSD_FULL_SIZE,
915                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
916
917         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/0,
918                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
919                                   &softc->device_stats);
920
921         xpt_release_ccb(ccb);
922
923         return(error);
924 }
925
926 static int
927 chposition(struct cam_periph *periph, struct changer_position *cp)
928 {
929         struct ch_softc *softc;
930         u_int16_t dst;
931         union ccb *ccb;
932         int error;
933
934         error = 0;
935         softc = (struct ch_softc *)periph->softc;
936
937         /*
938          * Check arguments.
939          */
940         if (cp->cp_type > CHET_DT)
941                 return (EINVAL);
942         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
943                 return (ENODEV);
944
945         /*
946          * Calculate the destination element.
947          */
948         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
949
950         ccb = cam_periph_getccb(periph, /*priority*/ 1);
951
952         scsi_position_to_element(&ccb->csio,
953                                  /* retries */ 1,
954                                  /* cbfcnp */ chdone,
955                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
956                                  /* tea */ softc->sc_picker,
957                                  /* dst */ dst,
958                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
959                                               TRUE : FALSE,
960                                  /* sense_len */ SSD_FULL_SIZE,
961                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
962
963         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
964                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
965                                   &softc->device_stats);
966
967         xpt_release_ccb(ccb);
968
969         return(error);
970 }
971
972 /*
973  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
974  * to host native byte order in the volume serial number.  The volume
975  * label as returned by the changer is transferred to user mode as
976  * nul-terminated string.  Volume labels are truncated at the first
977  * space, as suggested by SCSI-2.
978  */
979 static  void
980 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
981 {
982         int i;
983         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
984                 char c = voltag->vif[i];
985                 if (c && c != ' ')
986                         uvoltag->cv_volid[i] = c;
987                 else
988                         break;
989         }
990         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
991 }
992
993 /*
994  * Copy an an element status descriptor to a user-mode
995  * changer_element_status structure.
996  */
997
998 static  void
999 copy_element_status(struct ch_softc *softc,
1000                     u_int16_t flags,
1001                     struct read_element_status_descriptor *desc,
1002                     struct changer_element_status *ces)
1003 {
1004         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1005         u_int16_t et;
1006
1007         ces->ces_int_addr = eaddr;
1008         /* set up logical address in element status */
1009         for (et = CHET_MT; et <= CHET_DT; et++) {
1010                 if ((softc->sc_firsts[et] <= eaddr)
1011                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1012                         > eaddr)) {
1013                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1014                         ces->ces_type = et;
1015                         break;
1016                 }
1017         }
1018
1019         ces->ces_flags = desc->flags1;
1020
1021         ces->ces_sensecode = desc->sense_code;
1022         ces->ces_sensequal = desc->sense_qual;
1023
1024         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1025                 ces->ces_flags |= CES_INVERT;
1026
1027         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1028
1029                 eaddr = scsi_2btoul(desc->ssea);
1030
1031                 /* convert source address to logical format */
1032                 for (et = CHET_MT; et <= CHET_DT; et++) {
1033                         if ((softc->sc_firsts[et] <= eaddr)
1034                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1035                                 > eaddr)) {
1036                                 ces->ces_source_addr = 
1037                                         eaddr - softc->sc_firsts[et];
1038                                 ces->ces_source_type = et;
1039                                 ces->ces_flags |= CES_SOURCE_VALID;
1040                                 break;
1041                         }
1042                 }
1043
1044                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1045                         printf("ch: warning: could not map element source "
1046                                "address %ud to a valid element type\n",
1047                                eaddr);
1048         }
1049                         
1050
1051         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1052                 copy_voltag(&(ces->ces_pvoltag), &(desc->pvoltag));
1053         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1054                 copy_voltag(&(ces->ces_avoltag), &(desc->avoltag));
1055
1056         if (desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_IDVALID) {
1057                 ces->ces_flags |= CES_SCSIID_VALID;
1058                 ces->ces_scsi_id = desc->dt_scsi_addr;
1059         }
1060
1061         if (desc->dt_scsi_addr & READ_ELEMENT_STATUS_DT_LUVALID) {
1062                 ces->ces_flags |= CES_LUN_VALID;
1063                 ces->ces_scsi_lun = 
1064                         desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_LUNMASK;
1065         }
1066 }
1067
1068 static int
1069 chgetelemstatus(struct cam_periph *periph, 
1070                 struct changer_element_status_request *cesr)
1071 {
1072         struct read_element_status_header *st_hdr;
1073         struct read_element_status_page_header *pg_hdr;
1074         struct read_element_status_descriptor *desc;
1075         caddr_t data = NULL;
1076         size_t size, desclen;
1077         int avail, i, error = 0;
1078         struct changer_element_status *user_data = NULL;
1079         struct ch_softc *softc;
1080         union ccb *ccb;
1081         int chet = cesr->cesr_element_type;
1082         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1083
1084         softc = (struct ch_softc *)periph->softc;
1085
1086         /* perform argument checking */
1087
1088         /*
1089          * Perform a range check on the cesr_element_{base,count}
1090          * request argument fields.
1091          */
1092         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1093             || (cesr->cesr_element_base + cesr->cesr_element_count)
1094                 > softc->sc_counts[chet])
1095                 return (EINVAL);
1096
1097         /*
1098          * Request one descriptor for the given element type.  This
1099          * is used to determine the size of the descriptor so that
1100          * we can allocate enough storage for all of them.  We assume
1101          * that the first one can fit into 1k.
1102          */
1103         data = (caddr_t)kmalloc(1024, M_DEVBUF, M_INTWAIT);
1104
1105         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1106
1107         scsi_read_element_status(&ccb->csio,
1108                                  /* retries */ 1,
1109                                  /* cbfcnp */ chdone,
1110                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1111                                  /* voltag */ want_voltags,
1112                                  /* sea */ softc->sc_firsts[chet],
1113                                  /* count */ 1,
1114                                  /* data_ptr */ data,
1115                                  /* dxfer_len */ 1024,
1116                                  /* sense_len */ SSD_FULL_SIZE,
1117                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1118
1119         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1120                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1121                                   &softc->device_stats);
1122
1123         if (error)
1124                 goto done;
1125
1126         st_hdr = (struct read_element_status_header *)data;
1127         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1128                   sizeof(struct read_element_status_header));
1129         desclen = scsi_2btoul(pg_hdr->edl);
1130
1131         size = sizeof(struct read_element_status_header) +
1132                sizeof(struct read_element_status_page_header) +
1133                (desclen * cesr->cesr_element_count);
1134
1135         /*
1136          * Reallocate storage for descriptors and get them from the
1137          * device.
1138          */
1139         kfree(data, M_DEVBUF);
1140         data = (caddr_t)kmalloc(size, M_DEVBUF, M_INTWAIT);
1141
1142         scsi_read_element_status(&ccb->csio,
1143                                  /* retries */ 1,
1144                                  /* cbfcnp */ chdone,
1145                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1146                                  /* voltag */ want_voltags,
1147                                  /* sea */ softc->sc_firsts[chet]
1148                                  + cesr->cesr_element_base,
1149                                  /* count */ cesr->cesr_element_count,
1150                                  /* data_ptr */ data,
1151                                  /* dxfer_len */ size,
1152                                  /* sense_len */ SSD_FULL_SIZE,
1153                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1154         
1155         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1156                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1157                                   &softc->device_stats);
1158
1159         if (error)
1160                 goto done;
1161
1162         /*
1163          * Fill in the user status array.
1164          */
1165         st_hdr = (struct read_element_status_header *)data;
1166         avail = scsi_2btoul(st_hdr->count);
1167
1168         if (avail != cesr->cesr_element_count) {
1169                 xpt_print_path(periph->path);
1170                 printf("warning, READ ELEMENT STATUS avail != count\n");
1171         }
1172
1173         user_data = (struct changer_element_status *)
1174                 kmalloc(avail * sizeof(struct changer_element_status),
1175                        M_DEVBUF, M_INTWAIT | M_ZERO);
1176
1177         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1178                 sizeof(struct read_element_status_header) +
1179                 sizeof(struct read_element_status_page_header));
1180         /*
1181          * Set up the individual element status structures
1182          */
1183         for (i = 0; i < avail; ++i) {
1184                 struct changer_element_status *ces = &(user_data[i]);
1185
1186                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1187
1188                 desc = (struct read_element_status_descriptor *)
1189                        ((uintptr_t)desc + desclen);
1190         }
1191
1192         /* Copy element status structures out to userspace. */
1193         error = copyout(user_data,
1194                         cesr->cesr_element_status,
1195                         avail * sizeof(struct changer_element_status));
1196
1197  done:
1198         xpt_release_ccb(ccb);
1199
1200         if (data != NULL)
1201                 kfree(data, M_DEVBUF);
1202         if (user_data != NULL)
1203                 kfree(user_data, M_DEVBUF);
1204
1205         return (error);
1206 }
1207
1208 static int
1209 chielem(struct cam_periph *periph,
1210         unsigned int timeout)
1211 {
1212         union ccb *ccb;
1213         struct ch_softc *softc;
1214         int error;
1215
1216         if (!timeout) {
1217                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1218         } else {
1219                 timeout *= 1000;
1220         }
1221
1222         error = 0;
1223         softc = (struct ch_softc *)periph->softc;
1224
1225         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1226
1227         scsi_initialize_element_status(&ccb->csio,
1228                                       /* retries */ 1,
1229                                       /* cbfcnp */ chdone,
1230                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1231                                       /* sense_len */ SSD_FULL_SIZE,
1232                                       /* timeout */ timeout);
1233
1234         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1235                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1236                                   &softc->device_stats);
1237
1238         xpt_release_ccb(ccb);
1239
1240         return(error);
1241 }
1242
1243 static int
1244 chsetvoltag(struct cam_periph *periph,
1245             struct changer_set_voltag_request *csvr)
1246 {
1247         union ccb *ccb;
1248         struct ch_softc *softc;
1249         u_int16_t ea;
1250         u_int8_t sac;
1251         struct scsi_send_volume_tag_parameters ssvtp;
1252         int error;
1253         int i;
1254
1255         error = 0;
1256         softc = (struct ch_softc *)periph->softc;
1257
1258         bzero(&ssvtp, sizeof(ssvtp));
1259         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1260                 ssvtp.vitf[i] = ' ';
1261         }
1262
1263         /*
1264          * Check arguments.
1265          */
1266         if (csvr->csvr_type > CHET_DT)
1267                 return EINVAL;
1268         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1269                 return ENODEV;
1270
1271         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1272
1273         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1274                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1275                 case CSVR_MODE_SET:
1276                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1277                         break;
1278                 case CSVR_MODE_REPLACE:
1279                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1280                         break;
1281                 case CSVR_MODE_CLEAR:
1282                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1283                         break;
1284                 default:
1285                         error = EINVAL;
1286                         goto out;
1287                 }
1288         } else {
1289                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1290                 case CSVR_MODE_SET:
1291                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1292                         break;
1293                 case CSVR_MODE_REPLACE:
1294                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1295                         break;
1296                 case CSVR_MODE_CLEAR:
1297                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1298                         break;
1299                 default:
1300                         error = EINVAL;
1301                         goto out;
1302                 }
1303         }
1304
1305         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1306                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1307         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1308
1309         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1310
1311         scsi_send_volume_tag(&ccb->csio,
1312                              /* retries */ 1,
1313                              /* cbfcnp */ chdone,
1314                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1315                              /* element_address */ ea,
1316                              /* send_action_code */ sac,
1317                              /* parameters */ &ssvtp,
1318                              /* sense_len */ SSD_FULL_SIZE,
1319                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1320         
1321         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1322                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1323                                   &softc->device_stats);
1324
1325         xpt_release_ccb(ccb);
1326
1327  out:
1328         return error;
1329 }
1330
1331 static int
1332 chgetparams(struct cam_periph *periph)
1333 {
1334         union ccb *ccb;
1335         struct ch_softc *softc;
1336         void *mode_buffer;
1337         int mode_buffer_len;
1338         struct page_element_address_assignment *ea;
1339         struct page_device_capabilities *cap;
1340         int error, from, dbd;
1341         u_int8_t *moves, *exchanges;
1342
1343         error = 0;
1344
1345         softc = (struct ch_softc *)periph->softc;
1346
1347         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1348
1349         /*
1350          * The scsi_mode_sense_data structure is just a convenience
1351          * structure that allows us to easily calculate the worst-case
1352          * storage size of the mode sense buffer.
1353          */
1354         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1355
1356         mode_buffer = kmalloc(mode_buffer_len, M_TEMP, M_INTWAIT | M_ZERO);
1357
1358         if (softc->quirks & CH_Q_NO_DBD)
1359                 dbd = FALSE;
1360         else
1361                 dbd = TRUE;
1362
1363         /*
1364          * Get the element address assignment page.
1365          */
1366         scsi_mode_sense(&ccb->csio,
1367                         /* retries */ 1,
1368                         /* cbfcnp */ chdone,
1369                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1370                         /* dbd */ dbd,
1371                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1372                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1373                         /* param_buf */ (u_int8_t *)mode_buffer,
1374                         /* param_len */ mode_buffer_len,
1375                         /* sense_len */ SSD_FULL_SIZE,
1376                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1377
1378         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1379                                   /* sense_flags */ SF_RETRY_UA |
1380                                   SF_NO_PRINT | SF_RETRY_SELTO,
1381                                   &softc->device_stats);
1382
1383         if (error) {
1384                 if (dbd) {
1385                         struct scsi_mode_sense_6 *sms;
1386
1387                         sms = (struct scsi_mode_sense_6 *)
1388                                 ccb->csio.cdb_io.cdb_bytes;
1389
1390                         sms->byte2 &= ~SMS_DBD;
1391                         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1392                                                   /*sense_flags*/ SF_RETRY_UA |
1393                                                   SF_RETRY_SELTO,
1394                                                   &softc->device_stats);
1395                 } else {
1396                         /*
1397                          * Since we disabled sense printing above, print
1398                          * out the sense here since we got an error.
1399                          */
1400                         scsi_sense_print(&ccb->csio);
1401                 }
1402
1403                 if (error) {
1404                         xpt_print_path(periph->path);
1405                         printf("chgetparams: error getting element "
1406                                "address page\n");
1407                         xpt_release_ccb(ccb);
1408                         kfree(mode_buffer, M_TEMP);
1409                         return(error);
1410                 }
1411         }
1412
1413         ea = (struct page_element_address_assignment *)
1414                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1415
1416         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1417         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1418         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1419         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1420         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1421         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1422         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1423         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1424
1425         bzero(mode_buffer, mode_buffer_len);
1426
1427         /*
1428          * Now get the device capabilities page.
1429          */
1430         scsi_mode_sense(&ccb->csio,
1431                         /* retries */ 1,
1432                         /* cbfcnp */ chdone,
1433                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1434                         /* dbd */ dbd,
1435                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1436                         /* page */ CH_DEVICE_CAP_PAGE,
1437                         /* param_buf */ (u_int8_t *)mode_buffer,
1438                         /* param_len */ mode_buffer_len,
1439                         /* sense_len */ SSD_FULL_SIZE,
1440                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1441         
1442         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1443                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT |
1444                                   SF_RETRY_SELTO, &softc->device_stats);
1445
1446         if (error) {
1447                 if (dbd) {
1448                         struct scsi_mode_sense_6 *sms;
1449
1450                         sms = (struct scsi_mode_sense_6 *)
1451                                 ccb->csio.cdb_io.cdb_bytes;
1452
1453                         sms->byte2 &= ~SMS_DBD;
1454                         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1455                                                   /*sense_flags*/ SF_RETRY_UA |
1456                                                   SF_RETRY_SELTO,
1457                                                   &softc->device_stats);
1458                 } else {
1459                         /*
1460                          * Since we disabled sense printing above, print
1461                          * out the sense here since we got an error.
1462                          */
1463                         scsi_sense_print(&ccb->csio);
1464                 }
1465
1466                 if (error) {
1467                         xpt_print_path(periph->path);
1468                         printf("chgetparams: error getting device "
1469                                "capabilities page\n");
1470                         xpt_release_ccb(ccb);
1471                         kfree(mode_buffer, M_TEMP);
1472                         return(error);
1473                 }
1474         }
1475
1476         xpt_release_ccb(ccb);
1477
1478         cap = (struct page_device_capabilities *)
1479                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1480
1481         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1482         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1483         moves = &cap->move_from_mt;
1484         exchanges = &cap->exchange_with_mt;
1485         for (from = CHET_MT; from <= CHET_DT; ++from) {
1486                 softc->sc_movemask[from] = moves[from];
1487                 softc->sc_exchangemask[from] = exchanges[from];
1488         }
1489
1490         kfree(mode_buffer, M_TEMP);
1491
1492         return(error);
1493 }
1494
1495 void
1496 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1497                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1498                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1499                  u_int32_t dst, int invert, u_int8_t sense_len,
1500                  u_int32_t timeout)
1501 {
1502         struct scsi_move_medium *scsi_cmd;
1503
1504         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1505         bzero(scsi_cmd, sizeof(*scsi_cmd));
1506
1507         scsi_cmd->opcode = MOVE_MEDIUM;
1508
1509         scsi_ulto2b(tea, scsi_cmd->tea);
1510         scsi_ulto2b(src, scsi_cmd->src);
1511         scsi_ulto2b(dst, scsi_cmd->dst);
1512
1513         if (invert)
1514                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1515
1516         cam_fill_csio(csio,
1517                       retries,
1518                       cbfcnp,
1519                       /*flags*/ CAM_DIR_NONE,
1520                       tag_action,
1521                       /*data_ptr*/ NULL,
1522                       /*dxfer_len*/ 0,
1523                       sense_len,
1524                       sizeof(*scsi_cmd),
1525                       timeout);
1526 }
1527
1528 void
1529 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1530                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1531                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1532                      u_int32_t dst1, u_int32_t dst2, int invert1,
1533                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1534 {
1535         struct scsi_exchange_medium *scsi_cmd;
1536
1537         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1538         bzero(scsi_cmd, sizeof(*scsi_cmd));
1539
1540         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1541
1542         scsi_ulto2b(tea, scsi_cmd->tea);
1543         scsi_ulto2b(src, scsi_cmd->src);
1544         scsi_ulto2b(dst1, scsi_cmd->fdst);
1545         scsi_ulto2b(dst2, scsi_cmd->sdst);
1546
1547         if (invert1)
1548                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1549
1550         if (invert2)
1551                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1552
1553         cam_fill_csio(csio,
1554                       retries,
1555                       cbfcnp,
1556                       /*flags*/ CAM_DIR_NONE,
1557                       tag_action,
1558                       /*data_ptr*/ NULL,
1559                       /*dxfer_len*/ 0,
1560                       sense_len,
1561                       sizeof(*scsi_cmd),
1562                       timeout);
1563 }
1564
1565 void
1566 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1567                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1568                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1569                          int invert, u_int8_t sense_len, u_int32_t timeout)
1570 {
1571         struct scsi_position_to_element *scsi_cmd;
1572
1573         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1574         bzero(scsi_cmd, sizeof(*scsi_cmd));
1575
1576         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1577
1578         scsi_ulto2b(tea, scsi_cmd->tea);
1579         scsi_ulto2b(dst, scsi_cmd->dst);
1580
1581         if (invert)
1582                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1583
1584         cam_fill_csio(csio,
1585                       retries,
1586                       cbfcnp,
1587                       /*flags*/ CAM_DIR_NONE,
1588                       tag_action,
1589                       /*data_ptr*/ NULL,
1590                       /*dxfer_len*/ 0,
1591                       sense_len,
1592                       sizeof(*scsi_cmd),
1593                       timeout);
1594 }
1595
1596 void
1597 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1598                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1599                          u_int8_t tag_action, int voltag, u_int32_t sea,
1600                          u_int32_t count, u_int8_t *data_ptr,
1601                          u_int32_t dxfer_len, u_int8_t sense_len,
1602                          u_int32_t timeout)
1603 {
1604         struct scsi_read_element_status *scsi_cmd;
1605
1606         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1607         bzero(scsi_cmd, sizeof(*scsi_cmd));
1608
1609         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1610
1611         scsi_ulto2b(sea, scsi_cmd->sea);
1612         scsi_ulto2b(count, scsi_cmd->count);
1613         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1614
1615         if (voltag)
1616                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1617
1618         cam_fill_csio(csio,
1619                       retries,
1620                       cbfcnp,
1621                       /*flags*/ CAM_DIR_IN,
1622                       tag_action,
1623                       data_ptr,
1624                       dxfer_len,
1625                       sense_len,
1626                       sizeof(*scsi_cmd),
1627                       timeout);
1628 }
1629
1630 void
1631 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1632                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1633                                u_int8_t tag_action, u_int8_t sense_len,
1634                                u_int32_t timeout)
1635 {
1636         struct scsi_initialize_element_status *scsi_cmd;
1637
1638         scsi_cmd = (struct scsi_initialize_element_status *)
1639                     &csio->cdb_io.cdb_bytes;
1640         bzero(scsi_cmd, sizeof(*scsi_cmd));
1641
1642         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1643
1644         cam_fill_csio(csio,
1645                       retries,
1646                       cbfcnp,
1647                       /*flags*/ CAM_DIR_NONE,
1648                       tag_action,
1649                       /* data_ptr */ NULL,
1650                       /* dxfer_len */ 0,
1651                       sense_len,
1652                       sizeof(*scsi_cmd),
1653                       timeout);
1654 }
1655
1656 void
1657 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1658                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1659                      u_int8_t tag_action, 
1660                      u_int16_t element_address,
1661                      u_int8_t send_action_code,
1662                      struct scsi_send_volume_tag_parameters *parameters,
1663                      u_int8_t sense_len, u_int32_t timeout)
1664 {
1665         struct scsi_send_volume_tag *scsi_cmd;
1666
1667         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1668         bzero(scsi_cmd, sizeof(*scsi_cmd));
1669
1670         scsi_cmd->opcode = SEND_VOLUME_TAG;
1671         scsi_ulto2b(element_address, scsi_cmd->ea);
1672         scsi_cmd->sac = send_action_code;
1673         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1674
1675         cam_fill_csio(csio,
1676                       retries,
1677                       cbfcnp,
1678                       /*flags*/ CAM_DIR_OUT,
1679                       tag_action,
1680                       /* data_ptr */ (u_int8_t *) parameters,
1681                       sizeof(*parameters),
1682                       sense_len,
1683                       sizeof(*scsi_cmd),
1684                       timeout);
1685 }