Merge from vendor branch DIFFUTILS:
[dragonfly.git] / sys / bus / cam / scsi / scsi_cd.c
1 /*
2  * Copyright (c) 1997 Justin T. Gibbs.
3  * Copyright (c) 1997, 1998, 1999, 2000, 2001, 2003, 2003 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_cd.c,v 1.31.2.16 2003/10/21 22:26:11 thomas Exp $
28  * $DragonFly: src/sys/bus/cam/scsi/scsi_cd.c,v 1.13 2004/03/15 02:27:56 dillon Exp $
29  */
30 /*
31  * Portions of this driver taken from the original FreeBSD cd driver.
32  * Written by Julian Elischer (julian@tfs.com)
33  * for TRW Financial Systems for use under the MACH(2.5) operating system.
34  *
35  * TRW Financial Systems, in accordance with their agreement with Carnegie
36  * Mellon University, makes this software available to CMU to distribute
37  * or use in any manner that they see fit as long as this message is kept with
38  * the software. For this reason TFS also grants any other persons or
39  * organisations permission to use or modify this software.
40  *
41  * TFS supplies this software to be publicly redistributed
42  * on the understanding that TFS is not responsible for the correct
43  * functioning of this software in any circumstances.
44  *
45  * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
46  *
47  *      from: cd.c,v 1.83 1997/05/04 15:24:22 joerg Exp $
48  */
49
50 #include "opt_cd.h"
51
52 #include <sys/param.h>
53 #include <sys/bootmaj.h>
54 #include <sys/systm.h>
55 #include <sys/kernel.h>
56 #include <sys/buf.h>
57 #include <sys/conf.h>
58 #include <sys/disk.h>
59 #include <sys/malloc.h>
60 #include <sys/cdio.h>
61 #include <sys/cdrio.h>
62 #include <sys/dvdio.h>
63 #include <sys/devicestat.h>
64 #include <sys/sysctl.h>
65 #include <sys/taskqueue.h>
66 #include <sys/proc.h>
67 #include <sys/buf2.h>
68
69 #include "../cam.h"
70 #include "../cam_ccb.h"
71 #include "../cam_extend.h"
72 #include "../cam_periph.h"
73 #include "../cam_xpt_periph.h"
74 #include "../cam_queue.h"
75
76 #include "scsi_message.h"
77 #include "scsi_da.h"
78 #include "scsi_cd.h"
79
80 #define LEADOUT         0xaa            /* leadout toc entry */
81
82 struct cd_params {
83         u_int32_t blksize;
84         u_long    disksize;
85 };
86
87 typedef enum {
88         CD_Q_NONE               = 0x00,
89         CD_Q_NO_TOUCH           = 0x01,
90         CD_Q_BCD_TRACKS         = 0x02,
91         CD_Q_NO_CHANGER         = 0x04,
92         CD_Q_CHANGER            = 0x08,
93         CD_Q_10_BYTE_ONLY       = 0x10
94 } cd_quirks;
95
96 typedef enum {
97         CD_FLAG_INVALID         = 0x0001,
98         CD_FLAG_NEW_DISC        = 0x0002,
99         CD_FLAG_DISC_LOCKED     = 0x0004,
100         CD_FLAG_DISC_REMOVABLE  = 0x0008,
101         CD_FLAG_TAGGED_QUEUING  = 0x0010,
102         CD_FLAG_CHANGER         = 0x0040,
103         CD_FLAG_ACTIVE          = 0x0080,
104         CD_FLAG_SCHED_ON_COMP   = 0x0100,
105         CD_FLAG_RETRY_UA        = 0x0200,
106         CD_FLAG_VALID_MEDIA     = 0x0400,
107         CD_FLAG_VALID_TOC       = 0x0800,
108         CD_FLAG_OPEN            = 0x1000,
109         CD_FLAG_SCTX_INIT       = 0x2000
110 } cd_flags;
111
112 typedef enum {
113         CD_CCB_PROBE            = 0x01,
114         CD_CCB_BUFFER_IO        = 0x02,
115         CD_CCB_WAITING          = 0x03,
116         CD_CCB_TYPE_MASK        = 0x0F,
117         CD_CCB_RETRY_UA         = 0x10
118 } cd_ccb_state;
119
120 typedef enum {
121         CHANGER_TIMEOUT_SCHED           = 0x01,
122         CHANGER_SHORT_TMOUT_SCHED       = 0x02,
123         CHANGER_MANUAL_CALL             = 0x04,
124         CHANGER_NEED_TIMEOUT            = 0x08
125 } cd_changer_flags;
126
127 #define ccb_state ppriv_field0
128 #define ccb_bp ppriv_ptr1
129
130 struct cd_tocdata {
131         struct ioc_toc_header header;
132         struct cd_toc_entry entries[100];
133 };
134
135 struct cd_toc_single {
136         struct ioc_toc_header header;
137         struct cd_toc_entry entry;
138 };
139
140 typedef enum {
141         CD_STATE_PROBE,
142         CD_STATE_NORMAL
143 } cd_state;
144
145 struct cd_softc {
146         cam_pinfo               pinfo;
147         cd_state                state;
148         volatile cd_flags       flags;
149         struct buf_queue_head   buf_queue;
150         LIST_HEAD(, ccb_hdr)    pending_ccbs;
151         struct cd_params        params;
152         struct disk             disk;
153         union ccb               saved_ccb;
154         cd_quirks               quirks;
155         struct devstat          device_stats;
156         STAILQ_ENTRY(cd_softc)  changer_links;
157         struct cdchanger        *changer;
158         int                     bufs_left;
159         struct cam_periph       *periph;
160         int                     minimum_command_size;
161         struct task             sysctl_task;
162         struct sysctl_ctx_list  sysctl_ctx;
163         struct sysctl_oid       *sysctl_tree;
164         STAILQ_HEAD(, cd_mode_params)   mode_queue;
165         struct cd_tocdata       toc;
166 };
167
168 struct cd_page_sizes {
169         int page;
170         int page_size;
171 };
172
173 static struct cd_page_sizes cd_page_size_table[] =
174 {
175         { AUDIO_PAGE, sizeof(struct cd_audio_page)}
176 };
177
178 struct cd_quirk_entry {
179         struct scsi_inquiry_pattern inq_pat;
180         cd_quirks quirks;
181 };
182
183 /*
184  * The changer quirk entries aren't strictly necessary.  Basically, what
185  * they do is tell cdregister() up front that a device is a changer.
186  * Otherwise, it will figure that fact out once it sees a LUN on the device
187  * that is greater than 0.  If it is known up front that a device is a changer,
188  * all I/O to the device will go through the changer scheduling routines, as
189  * opposed to the "normal" CD code.
190  *
191  * NOTE ON 10_BYTE_ONLY quirks:  Any 10_BYTE_ONLY quirks MUST be because
192  * your device hangs when it gets a 10 byte command.  Adding a quirk just
193  * to get rid of the informative diagnostic message is not acceptable.  All
194  * 10_BYTE_ONLY quirks must be documented in full in a PR (which should be
195  * referenced in a comment along with the quirk) , and must be approved by
196  * ken@FreeBSD.org.  Any quirks added that don't adhere to this policy may
197  * be removed until the submitter can explain why they are needed.
198  * 10_BYTE_ONLY quirks will be removed (as they will no longer be necessary)
199  * when the CAM_NEW_TRAN_CODE work is done.
200  */
201 static struct cd_quirk_entry cd_quirk_table[] =
202 {
203         {
204                 { T_CDROM, SIP_MEDIA_REMOVABLE, "NRC", "MBR-7", "*"},
205                  /*quirks*/ CD_Q_CHANGER
206         },
207         {
208                 { T_CDROM, SIP_MEDIA_REMOVABLE, "PIONEER", "CD-ROM DRM*",
209                   "*"}, /* quirks */ CD_Q_CHANGER
210         },
211         {
212                 { T_CDROM, SIP_MEDIA_REMOVABLE, "NAKAMICH", "MJ-*", "*"},
213                  /* quirks */ CD_Q_CHANGER
214         },
215         {
216                 { T_CDROM, SIP_MEDIA_REMOVABLE, "CHINON", "CD-ROM CDS-535","*"},
217                 /* quirks */ CD_Q_BCD_TRACKS
218         }
219 };
220
221 static  d_open_t        cdopen;
222 static  d_close_t       cdclose;
223 static  d_ioctl_t       cdioctl;
224 static  d_strategy_t    cdstrategy;
225
226 static  periph_init_t   cdinit;
227 static  periph_ctor_t   cdregister;
228 static  periph_dtor_t   cdcleanup;
229 static  periph_start_t  cdstart;
230 static  periph_oninv_t  cdoninvalidate;
231 static  void            cdasync(void *callback_arg, u_int32_t code,
232                                 struct cam_path *path, void *arg);
233 static  int             cdcmdsizesysctl(SYSCTL_HANDLER_ARGS);
234 static  void            cdshorttimeout(void *arg);
235 static  void            cdschedule(struct cam_periph *periph, int priority);
236 static  void            cdrunchangerqueue(void *arg);
237 static  void            cdchangerschedule(struct cd_softc *softc);
238 static  int             cdrunccb(union ccb *ccb,
239                                  int (*error_routine)(union ccb *ccb,
240                                                       u_int32_t cam_flags,
241                                                       u_int32_t sense_flags),
242                                  u_int32_t cam_flags, u_int32_t sense_flags);
243 static union    ccb     *cdgetccb(struct cam_periph *periph,
244                                   u_int32_t priority);
245 static  void            cddone(struct cam_periph *periph,
246                                union ccb *start_ccb);
247 static  int             cderror(union ccb *ccb, u_int32_t cam_flags,
248                                 u_int32_t sense_flags);
249 static  union cd_pages  *cdgetpage(struct cd_mode_params *mode_params);
250 static  int             cdgetpagesize(int page_num);
251 static  void            cdprevent(struct cam_periph *periph, int action);
252 static  int             cdcheckmedia(struct cam_periph *periph);
253 static  int             cdsize(struct cam_periph *periph, u_int32_t *size);
254 static  int             cd6byteworkaround(union ccb *ccb);
255 static  int             cdreadtoc(struct cam_periph *periph, u_int32_t mode, 
256                                   u_int32_t start, u_int8_t *data, 
257                                   u_int32_t len, u_int32_t sense_flags);
258 static  int             cdgetmode(struct cam_periph *periph, 
259                                   struct cd_mode_params *data, u_int32_t page);
260 static  int             cdsetmode(struct cam_periph *periph,
261                                   struct cd_mode_params *data);
262 static  int             cdplay(struct cam_periph *periph, u_int32_t blk, 
263                                u_int32_t len);
264 static  int             cdreadsubchannel(struct cam_periph *periph, 
265                                          u_int32_t mode, u_int32_t format, 
266                                          int track, 
267                                          struct cd_sub_channel_info *data, 
268                                          u_int32_t len);
269 static  int             cdplaymsf(struct cam_periph *periph, u_int32_t startm, 
270                                   u_int32_t starts, u_int32_t startf, 
271                                   u_int32_t endm, u_int32_t ends, 
272                                   u_int32_t endf);
273 static  int             cdplaytracks(struct cam_periph *periph, 
274                                      u_int32_t strack, u_int32_t sindex,
275                                      u_int32_t etrack, u_int32_t eindex);
276 static  int             cdpause(struct cam_periph *periph, u_int32_t go);
277 static  int             cdstopunit(struct cam_periph *periph, u_int32_t eject);
278 static  int             cdstartunit(struct cam_periph *periph, int load);
279 static  int             cdsetspeed(struct cam_periph *periph,
280                                    u_int32_t rdspeed, u_int32_t wrspeed);
281 static  int             cdreportkey(struct cam_periph *periph,
282                                     struct dvd_authinfo *authinfo);
283 static  int             cdsendkey(struct cam_periph *periph,
284                                   struct dvd_authinfo *authinfo);
285 static  int             cdreaddvdstructure(struct cam_periph *periph,
286                                            struct dvd_struct *dvdstruct);
287
288 static struct periph_driver cddriver =
289 {
290         cdinit, "cd",
291         TAILQ_HEAD_INITIALIZER(cddriver.units), /* generation */ 0
292 };
293
294 DATA_SET(periphdriver_set, cddriver);
295
296 /* For 2.2-stable support */
297 #ifndef D_DISK
298 #define D_DISK 0
299 #endif
300 static struct cdevsw cd_cdevsw = {
301         /* name */      "cd",
302         /* maj */       SCSICD_CDEV_MAJOR,
303         /* flags */     D_DISK,
304         /* port */      NULL,
305         /* autoq */     0,
306
307         /* open */      cdopen,
308         /* close */     cdclose,
309         /* read */      physread,
310         /* write */     physwrite,
311         /* ioctl */     cdioctl,
312         /* poll */      nopoll,
313         /* mmap */      nommap,
314         /* strategy */  cdstrategy,
315         /* dump */      nodump,
316         /* psize */     nopsize,
317 };
318
319 static struct extend_array *cdperiphs;
320 static int num_changers;
321
322 #ifndef CHANGER_MIN_BUSY_SECONDS
323 #define CHANGER_MIN_BUSY_SECONDS        5
324 #endif
325 #ifndef CHANGER_MAX_BUSY_SECONDS
326 #define CHANGER_MAX_BUSY_SECONDS        15
327 #endif
328
329 static int changer_min_busy_seconds = CHANGER_MIN_BUSY_SECONDS;
330 static int changer_max_busy_seconds = CHANGER_MAX_BUSY_SECONDS;
331
332 /*
333  * XXX KDM this CAM node should be moved if we ever get more CAM sysctl
334  * variables.
335  */
336 SYSCTL_NODE(_kern_cam, OID_AUTO, cd, CTLFLAG_RD, 0, "CAM CDROM driver");
337 SYSCTL_NODE(_kern_cam_cd, OID_AUTO, changer, CTLFLAG_RD, 0, "CD Changer");
338 SYSCTL_INT(_kern_cam_cd_changer, OID_AUTO, min_busy_seconds, CTLFLAG_RW,
339            &changer_min_busy_seconds, 0, "Minimum changer scheduling quantum");
340 TUNABLE_INT("kern.cam.cd.changer.min_busy_seconds", &changer_min_busy_seconds);
341 SYSCTL_INT(_kern_cam_cd_changer, OID_AUTO, max_busy_seconds, CTLFLAG_RW,
342            &changer_max_busy_seconds, 0, "Maximum changer scheduling quantum");
343 TUNABLE_INT("kern.cam.cd.changer.max_busy_seconds", &changer_max_busy_seconds);
344
345 struct cdchanger {
346         path_id_t                        path_id;
347         target_id_t                      target_id;
348         int                              num_devices;
349         struct camq                      devq;
350         struct timeval                   start_time;
351         struct cd_softc                  *cur_device;
352         struct callout_handle            short_handle;
353         struct callout_handle            long_handle;
354         volatile cd_changer_flags        flags;
355         STAILQ_ENTRY(cdchanger)          changer_links;
356         STAILQ_HEAD(chdevlist, cd_softc) chluns;
357 };
358
359 static STAILQ_HEAD(changerlist, cdchanger) changerq;
360
361 void
362 cdinit(void)
363 {
364         cam_status status;
365         struct cam_path *path;
366
367         /*
368          * Create our extend array for storing the devices we attach to.
369          */
370         cdperiphs = cam_extend_new();
371         if (cdperiphs == NULL) {
372                 printf("cd: Failed to alloc extend array!\n");
373                 return;
374         }
375
376         /*
377          * Install a global async callback.  This callback will
378          * receive async callbacks like "new device found".
379          */
380         status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
381                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
382
383         if (status == CAM_REQ_CMP) {
384                 struct ccb_setasync csa;
385
386                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
387                 csa.ccb_h.func_code = XPT_SASYNC_CB;
388                 csa.event_enable = AC_FOUND_DEVICE;
389                 csa.callback = cdasync;
390                 csa.callback_arg = NULL;
391                 xpt_action((union ccb *)&csa);
392                 status = csa.ccb_h.status;
393                 xpt_free_path(path);
394         }
395
396         if (status != CAM_REQ_CMP) {
397                 printf("cd: Failed to attach master async callback "
398                        "due to status 0x%x!\n", status);
399         }
400 }
401
402 static void
403 cdoninvalidate(struct cam_periph *periph)
404 {
405         int s;
406         struct cd_softc *softc;
407         struct buf *q_bp;
408         struct ccb_setasync csa;
409
410         softc = (struct cd_softc *)periph->softc;
411
412         /*
413          * De-register any async callbacks.
414          */
415         xpt_setup_ccb(&csa.ccb_h, periph->path,
416                       /* priority */ 5);
417         csa.ccb_h.func_code = XPT_SASYNC_CB;
418         csa.event_enable = 0;
419         csa.callback = cdasync;
420         csa.callback_arg = periph;
421         xpt_action((union ccb *)&csa);
422
423         softc->flags |= CD_FLAG_INVALID;
424
425         /*
426          * Although the oninvalidate() routines are always called at
427          * splsoftcam, we need to be at splbio() here to keep the buffer
428          * queue from being modified while we traverse it.
429          */
430         s = splbio();
431
432         /*
433          * Return all queued I/O with ENXIO.
434          * XXX Handle any transactions queued to the card
435          *     with XPT_ABORT_CCB.
436          */
437         while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){
438                 bufq_remove(&softc->buf_queue, q_bp);
439                 q_bp->b_resid = q_bp->b_bcount;
440                 q_bp->b_error = ENXIO;
441                 q_bp->b_flags |= B_ERROR;
442                 biodone(q_bp);
443         }
444         splx(s);
445
446         /*
447          * If this device is part of a changer, and it was scheduled
448          * to run, remove it from the run queue since we just nuked
449          * all of its scheduled I/O.
450          */
451         if ((softc->flags & CD_FLAG_CHANGER)
452          && (softc->pinfo.index != CAM_UNQUEUED_INDEX))
453                 camq_remove(&softc->changer->devq, softc->pinfo.index);
454
455         xpt_print_path(periph->path);
456         printf("lost device\n");
457 }
458
459 static void
460 cdcleanup(struct cam_periph *periph)
461 {
462         struct cd_softc *softc;
463         int s;
464
465         softc = (struct cd_softc *)periph->softc;
466
467         xpt_print_path(periph->path);
468         printf("removing device entry\n");
469
470         if ((softc->flags & CD_FLAG_SCTX_INIT) != 0
471             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
472                 xpt_print_path(periph->path);
473                 printf("can't remove sysctl context\n");
474         }
475
476         s = splsoftcam();
477         /*
478          * In the queued, non-active case, the device in question
479          * has already been removed from the changer run queue.  Since this
480          * device is active, we need to de-activate it, and schedule
481          * another device to run.  (if there is another one to run)
482          */
483         if ((softc->flags & CD_FLAG_CHANGER)
484          && (softc->flags & CD_FLAG_ACTIVE)) {
485
486                 /*
487                  * The purpose of the short timeout is soley to determine
488                  * whether the current device has finished or not.  Well,
489                  * since we're removing the active device, we know that it
490                  * is finished.  So, get rid of the short timeout.
491                  * Otherwise, if we're in the time period before the short
492                  * timeout fires, and there are no other devices in the
493                  * queue to run, there won't be any other device put in the
494                  * active slot.  i.e., when we call cdrunchangerqueue()
495                  * below, it won't do anything.  Then, when the short
496                  * timeout fires, it'll look at the "current device", which
497                  * we are free below, and possibly panic the kernel on a
498                  * bogus pointer reference.
499                  *
500                  * The long timeout doesn't really matter, since we
501                  * decrement the qfrozen_cnt to indicate that there is
502                  * nothing in the active slot now.  Therefore, there won't
503                  * be any bogus pointer references there.
504                  */
505                 if (softc->changer->flags & CHANGER_SHORT_TMOUT_SCHED) {
506                         untimeout(cdshorttimeout, softc->changer,
507                                   softc->changer->short_handle);
508                         softc->changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
509                 }
510                 softc->changer->devq.qfrozen_cnt--;
511                 softc->changer->flags |= CHANGER_MANUAL_CALL;
512                 cdrunchangerqueue(softc->changer);
513         }
514
515         /*
516          * If we're removing the last device on the changer, go ahead and
517          * remove the changer device structure.
518          */
519         if ((softc->flags & CD_FLAG_CHANGER)
520          && (--softc->changer->num_devices == 0)) {
521
522                 /*
523                  * Theoretically, there shouldn't be any timeouts left, but
524                  * I'm not completely sure that that will be the case.  So,
525                  * it won't hurt to check and see if there are any left.
526                  */
527                 if (softc->changer->flags & CHANGER_TIMEOUT_SCHED) {
528                         untimeout(cdrunchangerqueue, softc->changer,
529                                   softc->changer->long_handle);
530                         softc->changer->flags &= ~CHANGER_TIMEOUT_SCHED;
531                 }
532
533                 if (softc->changer->flags & CHANGER_SHORT_TMOUT_SCHED) {
534                         untimeout(cdshorttimeout, softc->changer,
535                                   softc->changer->short_handle);
536                         softc->changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
537                 }
538
539                 STAILQ_REMOVE(&changerq, softc->changer, cdchanger,
540                               changer_links);
541                 xpt_print_path(periph->path);
542                 printf("removing changer entry\n");
543                 free(softc->changer, M_DEVBUF);
544                 num_changers--;
545         }
546         devstat_remove_entry(&softc->device_stats);
547         cam_extend_release(cdperiphs, periph->unit_number);
548         if (softc->disk.d_dev) {
549                 disk_destroy(&softc->disk);
550         }
551         free(softc, M_DEVBUF);
552         splx(s);
553 }
554
555 static void
556 cdasync(void *callback_arg, u_int32_t code,
557         struct cam_path *path, void *arg)
558 {
559         struct cam_periph *periph;
560
561         periph = (struct cam_periph *)callback_arg;
562         switch (code) {
563         case AC_FOUND_DEVICE:
564         {
565                 struct ccb_getdev *cgd;
566                 cam_status status;
567
568                 cgd = (struct ccb_getdev *)arg;
569
570                 if (SID_TYPE(&cgd->inq_data) != T_CDROM
571                     && SID_TYPE(&cgd->inq_data) != T_WORM)
572                         break;
573
574                 /*
575                  * Allocate a peripheral instance for
576                  * this device and start the probe
577                  * process.
578                  */
579                 status = cam_periph_alloc(cdregister, cdoninvalidate,
580                                           cdcleanup, cdstart,
581                                           "cd", CAM_PERIPH_BIO,
582                                           cgd->ccb_h.path, cdasync,
583                                           AC_FOUND_DEVICE, cgd);
584
585                 if (status != CAM_REQ_CMP
586                  && status != CAM_REQ_INPROG)
587                         printf("cdasync: Unable to attach new device "
588                                "due to status 0x%x\n", status);
589
590                 break;
591         }
592         case AC_SENT_BDR:
593         case AC_BUS_RESET:
594         {
595                 struct cd_softc *softc;
596                 struct ccb_hdr *ccbh;
597                 int s;
598
599                 softc = (struct cd_softc *)periph->softc;
600                 s = splsoftcam();
601                 /*
602                  * Don't fail on the expected unit attention
603                  * that will occur.
604                  */
605                 softc->flags |= CD_FLAG_RETRY_UA;
606                 for (ccbh = LIST_FIRST(&softc->pending_ccbs);
607                      ccbh != NULL; ccbh = LIST_NEXT(ccbh, periph_links.le))
608                         ccbh->ccb_state |= CD_CCB_RETRY_UA;
609                 splx(s);
610                 /* FALLTHROUGH */
611         }
612         default:
613                 cam_periph_async(periph, code, path, arg);
614                 break;
615         }
616 }
617
618 static void
619 cdsysctlinit(void *context, int pending)
620 {
621         struct cam_periph *periph;
622         struct cd_softc *softc;
623         char tmpstr[80], tmpstr2[80];
624
625         periph = (struct cam_periph *)context;
626         softc = (struct cd_softc *)periph->softc;
627
628         snprintf(tmpstr, sizeof(tmpstr), "CAM CD unit %d", periph->unit_number);
629         snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
630
631         sysctl_ctx_init(&softc->sysctl_ctx);
632         softc->flags |= CD_FLAG_SCTX_INIT;
633         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
634         SYSCTL_STATIC_CHILDREN(_kern_cam_cd), OID_AUTO,
635         tmpstr2, CTLFLAG_RD, 0, tmpstr);
636
637         if (softc->sysctl_tree == NULL) {
638                 printf("cdsysctlinit: unable to allocate sysctl tree\n");
639                 return;
640         }
641
642         /*
643          * Now register the sysctl handler, so the user can the value on
644          * the fly.
645          */
646         SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
647                         OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
648                         &softc->minimum_command_size, 0, cdcmdsizesysctl, "I",
649                         "Minimum CDB size");
650 }
651
652 /*
653  * We have a handler function for this so we can check the values when the
654  * user sets them, instead of every time we look at them.
655  */
656 static int
657 cdcmdsizesysctl(SYSCTL_HANDLER_ARGS)
658 {
659         int error, value;
660
661         value = *(int *)arg1;
662
663         error = sysctl_handle_int(oidp, &value, 0, req);
664
665         if ((error != 0) || (req->newptr == NULL))
666                 return (error);
667
668         /*
669          * The only real values we can have here are 6 or 10.  I don't
670          * really forsee having 12 be an option at any time in the future.
671          * So if the user sets something less than or equal to 6, we'll set
672          * it to 6.  If he sets something greater than 6, we'll set it to 10.
673          *
674          * I suppose we could just return an error here for the wrong values,
675          * but I don't think it's necessary to do so, as long as we can
676          * determine the user's intent without too much trouble.
677          */
678         if (value < 6)
679                 value = 6;
680         else if (value > 6)
681                 value = 10;
682
683         *(int *)arg1 = value;
684
685         return (0);
686 }
687
688
689 static cam_status
690 cdregister(struct cam_periph *periph, void *arg)
691 {
692         struct cd_softc *softc;
693         struct ccb_setasync csa;
694         struct ccb_pathinq cpi;
695         struct ccb_getdev *cgd;
696         char tmpstr[80];
697         caddr_t match;
698
699         cgd = (struct ccb_getdev *)arg;
700         if (periph == NULL) {
701                 printf("cdregister: periph was NULL!!\n");
702                 return(CAM_REQ_CMP_ERR);
703         }
704         if (cgd == NULL) {
705                 printf("cdregister: no getdev CCB, can't register device\n");
706                 return(CAM_REQ_CMP_ERR);
707         }
708
709         softc = malloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
710         LIST_INIT(&softc->pending_ccbs);
711         STAILQ_INIT(&softc->mode_queue);
712         softc->state = CD_STATE_PROBE;
713         bufq_init(&softc->buf_queue);
714         if (SID_IS_REMOVABLE(&cgd->inq_data))
715                 softc->flags |= CD_FLAG_DISC_REMOVABLE;
716         if ((cgd->inq_data.flags & SID_CmdQue) != 0)
717                 softc->flags |= CD_FLAG_TAGGED_QUEUING;
718
719         periph->softc = softc;
720         softc->periph = periph;
721
722         cam_extend_set(cdperiphs, periph->unit_number, periph);
723
724         /*
725          * See if this device has any quirks.
726          */
727         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
728                                (caddr_t)cd_quirk_table,
729                                sizeof(cd_quirk_table)/sizeof(*cd_quirk_table),
730                                sizeof(*cd_quirk_table), scsi_inquiry_match);
731
732         if (match != NULL)
733                 softc->quirks = ((struct cd_quirk_entry *)match)->quirks;
734         else
735                 softc->quirks = CD_Q_NONE;
736
737         /* Check if the SIM does not want 6 byte commands */
738         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
739         cpi.ccb_h.func_code = XPT_PATH_INQ;
740         xpt_action((union ccb *)&cpi);
741         if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
742                 softc->quirks |= CD_Q_10_BYTE_ONLY;
743
744         TASK_INIT(&softc->sysctl_task, 0, cdsysctlinit, periph);
745
746         /* The default is 6 byte commands, unless quirked otherwise */
747         if (softc->quirks & CD_Q_10_BYTE_ONLY)
748                 softc->minimum_command_size = 10;
749         else
750                 softc->minimum_command_size = 6;
751
752         /*
753          * Load the user's default, if any.
754          */
755         snprintf(tmpstr, sizeof(tmpstr), "kern.cam.cd.%d.minimum_cmd_size",
756                 periph->unit_number);
757         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_command_size);
758
759         /* 6 and 10 are the only permissible values here. */
760         if (softc->minimum_command_size < 6)
761                 softc->minimum_command_size = 6;
762         else if (softc->minimum_command_size > 6)
763                 softc->minimum_command_size = 10;
764
765         /*
766          * We need to register the statistics structure for this device,
767          * but we don't have the blocksize yet for it.  So, we register
768          * the structure and indicate that we don't have the blocksize
769          * yet.  Unlike other SCSI peripheral drivers, we explicitly set
770          * the device type here to be CDROM, rather than just ORing in
771          * the device type.  This is because this driver can attach to either
772          * CDROM or WORM devices, and we want this peripheral driver to
773          * show up in the devstat list as a CD peripheral driver, not a
774          * WORM peripheral driver.  WORM drives will also have the WORM
775          * driver attached to them.
776          */
777         devstat_add_entry(&softc->device_stats, "cd", 
778                           periph->unit_number, 0,
779                           DEVSTAT_BS_UNAVAILABLE,
780                           DEVSTAT_TYPE_CDROM | DEVSTAT_TYPE_IF_SCSI,
781                           DEVSTAT_PRIORITY_CD);
782         disk_create(periph->unit_number, &softc->disk,
783                     DSO_ONESLICE | DSO_COMPATLABEL, &cd_cdevsw);
784
785         /*
786          * Add an async callback so that we get
787          * notified if this device goes away.
788          */
789         xpt_setup_ccb(&csa.ccb_h, periph->path,
790                       /* priority */ 5);
791         csa.ccb_h.func_code = XPT_SASYNC_CB;
792         csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE;
793         csa.callback = cdasync;
794         csa.callback_arg = periph;
795         xpt_action((union ccb *)&csa);
796
797         /*
798          * If the target lun is greater than 0, we most likely have a CD
799          * changer device.  Check the quirk entries as well, though, just
800          * in case someone has a CD tower with one lun per drive or
801          * something like that.  Also, if we know up front that a
802          * particular device is a changer, we can mark it as such starting
803          * with lun 0, instead of lun 1.  It shouldn't be necessary to have
804          * a quirk entry to define something as a changer, however.
805          */
806         if (((cgd->ccb_h.target_lun > 0)
807           && ((softc->quirks & CD_Q_NO_CHANGER) == 0))
808          || ((softc->quirks & CD_Q_CHANGER) != 0)) {
809                 struct cdchanger *nchanger;
810                 struct cam_periph *nperiph;
811                 struct cam_path *path;
812                 cam_status status;
813                 int found;
814
815                 /* Set the changer flag in the current device's softc */
816                 softc->flags |= CD_FLAG_CHANGER;
817
818                 if (num_changers == 0)
819                         STAILQ_INIT(&changerq);
820
821                 /*
822                  * Now, look around for an existing changer device with the
823                  * same path and target ID as the current device.
824                  */
825                 for (found = 0,
826                      nchanger = (struct cdchanger *)STAILQ_FIRST(&changerq);
827                      nchanger != NULL;
828                      nchanger = STAILQ_NEXT(nchanger, changer_links)){
829                         if ((nchanger->path_id == cgd->ccb_h.path_id) 
830                          && (nchanger->target_id == cgd->ccb_h.target_id)) {
831                                 found = 1;
832                                 break;
833                         }
834                 }
835
836                 /*
837                  * If we found a matching entry, just add this device to
838                  * the list of devices on this changer.
839                  */
840                 if (found == 1) {
841                         struct chdevlist *chlunhead;
842
843                         chlunhead = &nchanger->chluns;
844
845                         /*
846                          * XXX KDM look at consolidating this code with the
847                          * code below in a separate function.
848                          */
849
850                         /*
851                          * Create a path with lun id 0, and see if we can
852                          * find a matching device
853                          */
854                         status = xpt_create_path(&path, /*periph*/ periph,
855                                                  cgd->ccb_h.path_id,
856                                                  cgd->ccb_h.target_id, 0);
857
858                         if ((status == CAM_REQ_CMP)
859                          && ((nperiph = cam_periph_find(path, "cd")) != NULL)){
860                                 struct cd_softc *nsoftc;
861
862                                 nsoftc = (struct cd_softc *)nperiph->softc;
863
864                                 if ((nsoftc->flags & CD_FLAG_CHANGER) == 0){
865                                         nsoftc->flags |= CD_FLAG_CHANGER;
866                                         nchanger->num_devices++;
867                                         if (camq_resize(&nchanger->devq,
868                                            nchanger->num_devices)!=CAM_REQ_CMP){
869                                                 printf("cdregister: "
870                                                        "camq_resize "
871                                                        "failed, changer "
872                                                        "support may "
873                                                        "be messed up\n");
874                                         }
875                                         nsoftc->changer = nchanger;
876                                         nsoftc->pinfo.index =CAM_UNQUEUED_INDEX;
877
878                                         STAILQ_INSERT_TAIL(&nchanger->chluns,
879                                                           nsoftc,changer_links);
880                                 }
881                                 xpt_free_path(path);
882                         } else if (status == CAM_REQ_CMP)
883                                 xpt_free_path(path);
884                         else {
885                                 printf("cdregister: unable to allocate path\n"
886                                        "cdregister: changer support may be "
887                                        "broken\n");
888                         }
889
890                         nchanger->num_devices++;
891
892                         softc->changer = nchanger;
893                         softc->pinfo.index = CAM_UNQUEUED_INDEX;
894
895                         if (camq_resize(&nchanger->devq,
896                             nchanger->num_devices) != CAM_REQ_CMP) {
897                                 printf("cdregister: camq_resize "
898                                        "failed, changer support may "
899                                        "be messed up\n");
900                         }
901
902                         STAILQ_INSERT_TAIL(chlunhead, softc, changer_links);
903                 }
904                 /*
905                  * In this case, we don't already have an entry for this
906                  * particular changer, so we need to create one, add it to
907                  * the queue, and queue this device on the list for this
908                  * changer.  Before we queue this device, however, we need
909                  * to search for lun id 0 on this target, and add it to the
910                  * queue first, if it exists.  (and if it hasn't already
911                  * been marked as part of the changer.)
912                  */
913                 else {
914                         nchanger = malloc(sizeof(struct cdchanger),
915                                 M_DEVBUF, M_INTWAIT | M_ZERO);
916
917                         if (camq_init(&nchanger->devq, 1) != 0) {
918                                 softc->flags &= ~CD_FLAG_CHANGER;
919                                 printf("cdregister: changer support "
920                                        "disabled\n");
921                                 goto cdregisterexit;
922                         }
923
924                         num_changers++;
925
926                         nchanger->path_id = cgd->ccb_h.path_id;
927                         nchanger->target_id = cgd->ccb_h.target_id;
928
929                         /* this is superfluous, but it makes things clearer */
930                         nchanger->num_devices = 0;
931
932                         STAILQ_INIT(&nchanger->chluns);
933
934                         STAILQ_INSERT_TAIL(&changerq, nchanger,
935                                            changer_links);
936                         
937                         /*
938                          * Create a path with lun id 0, and see if we can
939                          * find a matching device
940                          */
941                         status = xpt_create_path(&path, /*periph*/ periph,
942                                                  cgd->ccb_h.path_id,
943                                                  cgd->ccb_h.target_id, 0);
944
945                         /*
946                          * If we were able to allocate the path, and if we
947                          * find a matching device and it isn't already
948                          * marked as part of a changer, then we add it to
949                          * the current changer.
950                          */
951                         if ((status == CAM_REQ_CMP)
952                          && ((nperiph = cam_periph_find(path, "cd")) != NULL)
953                          && ((((struct cd_softc *)periph->softc)->flags &
954                                CD_FLAG_CHANGER) == 0)) {
955                                 struct cd_softc *nsoftc;
956
957                                 nsoftc = (struct cd_softc *)nperiph->softc;
958
959                                 nsoftc->flags |= CD_FLAG_CHANGER;
960                                 nchanger->num_devices++;
961                                 if (camq_resize(&nchanger->devq,
962                                     nchanger->num_devices) != CAM_REQ_CMP) {
963                                         printf("cdregister: camq_resize "
964                                                "failed, changer support may "
965                                                "be messed up\n");
966                                 }
967                                 nsoftc->changer = nchanger;
968                                 nsoftc->pinfo.index = CAM_UNQUEUED_INDEX;
969
970                                 STAILQ_INSERT_TAIL(&nchanger->chluns,
971                                                    nsoftc, changer_links);
972                                 xpt_free_path(path);
973                         } else if (status == CAM_REQ_CMP)
974                                 xpt_free_path(path);
975                         else {
976                                 printf("cdregister: unable to allocate path\n"
977                                        "cdregister: changer support may be "
978                                        "broken\n");
979                         }
980
981                         softc->changer = nchanger;
982                         softc->pinfo.index = CAM_UNQUEUED_INDEX;
983                         nchanger->num_devices++;
984                         if (camq_resize(&nchanger->devq,
985                             nchanger->num_devices) != CAM_REQ_CMP) {
986                                 printf("cdregister: camq_resize "
987                                        "failed, changer support may "
988                                        "be messed up\n");
989                         }
990                         STAILQ_INSERT_TAIL(&nchanger->chluns, softc,
991                                            changer_links);
992                 }
993         }
994
995 cdregisterexit:
996
997         /* Lock this peripheral until we are setup */
998         /* Can't block */
999         cam_periph_lock(periph, 0); 
1000
1001         if ((softc->flags & CD_FLAG_CHANGER) == 0)
1002                 xpt_schedule(periph, /*priority*/5);
1003         else
1004                 cdschedule(periph, /*priority*/ 5);
1005
1006         return(CAM_REQ_CMP);
1007 }
1008
1009 static int
1010 cdopen(dev_t dev, int flags, int fmt, struct thread *td)
1011 {
1012         struct cam_periph *periph;
1013         struct cd_softc *softc;
1014         int unit, error;
1015         int s;
1016
1017         unit = dkunit(dev);
1018         periph = cam_extend_get(cdperiphs, unit);
1019
1020         if (periph == NULL)
1021                 return (ENXIO);
1022
1023         softc = (struct cd_softc *)periph->softc;
1024
1025         /*
1026          * Grab splsoftcam and hold it until we lock the peripheral.
1027          */
1028         s = splsoftcam();
1029         if (softc->flags & CD_FLAG_INVALID) {
1030                 splx(s);
1031                 return(ENXIO);
1032         }
1033
1034         if ((error = cam_periph_lock(periph, PCATCH)) != 0) {
1035                 splx(s);
1036                 return (error);
1037         }
1038
1039         splx(s);
1040
1041         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
1042                 return(ENXIO);
1043
1044         /*
1045          * Check for media, and set the appropriate flags.  We don't bail
1046          * if we don't have media, but then we don't allow anything but the
1047          * CDIOCEJECT/CDIOCCLOSE ioctls if there is no media.
1048          *
1049          * XXX KDM for now, we do fail the open if we don't have media.  We
1050          * can change this once we've figured out how to make the slice
1051          * code work well with media changing underneath it.
1052          */
1053         error = cdcheckmedia(periph);
1054
1055         if (error == 0)
1056                 softc->flags |= CD_FLAG_OPEN;
1057
1058         cam_periph_unlock(periph);
1059
1060         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("leaving cdopen\n"));
1061
1062         return (error);
1063 }
1064
1065 static int
1066 cdclose(dev_t dev, int flag, int fmt, struct thread *td)
1067 {
1068         struct  cam_periph *periph;
1069         struct  cd_softc *softc;
1070         int     unit, error;
1071
1072         unit = dkunit(dev);
1073         periph = cam_extend_get(cdperiphs, unit);
1074         if (periph == NULL)
1075                 return (ENXIO); 
1076
1077         softc = (struct cd_softc *)periph->softc;
1078
1079         if ((error = cam_periph_lock(periph, 0)) != 0)
1080                 return (error);
1081
1082         if ((softc->flags & CD_FLAG_DISC_REMOVABLE) != 0)
1083                 cdprevent(periph, PR_ALLOW);
1084
1085         /*
1086          * Unconditionally set the dsopen() flags back to their default
1087          * state.
1088          */
1089         softc->disk.d_dsflags &= ~DSO_NOLABELS;
1090         softc->disk.d_dsflags |= DSO_COMPATLABEL;
1091
1092         /*
1093          * Since we're closing this CD, mark the blocksize as unavailable.
1094          * It will be marked as available when the CD is opened again.
1095          */
1096         softc->device_stats.flags |= DEVSTAT_BS_UNAVAILABLE;
1097
1098         /*
1099          * We'll check the media and toc again at the next open().
1100          */
1101         softc->flags &= ~(CD_FLAG_VALID_MEDIA|CD_FLAG_VALID_TOC);
1102         
1103         softc->flags &= ~CD_FLAG_OPEN;
1104
1105         cam_periph_unlock(periph);
1106         cam_periph_release(periph);
1107
1108         return (0);
1109 }
1110
1111 static void
1112 cdshorttimeout(void *arg)
1113 {
1114         struct cdchanger *changer;
1115         int s;
1116
1117         s = splsoftcam();
1118
1119         changer = (struct cdchanger *)arg;
1120
1121         /* Always clear the short timeout flag, since that's what we're in */
1122         changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
1123
1124         /*
1125          * Check to see if there is any more pending or outstanding I/O for
1126          * this device.  If not, move it out of the active slot.
1127          */
1128         if ((bufq_first(&changer->cur_device->buf_queue) == NULL)
1129          && (changer->cur_device->device_stats.busy_count == 0)) {
1130                 changer->flags |= CHANGER_MANUAL_CALL;
1131                 cdrunchangerqueue(changer);
1132         }
1133
1134         splx(s);
1135 }
1136
1137 /*
1138  * This is a wrapper for xpt_schedule.  It only applies to changers.
1139  */
1140 static void
1141 cdschedule(struct cam_periph *periph, int priority)
1142 {
1143         struct cd_softc *softc;
1144         int s;
1145
1146         s = splsoftcam();
1147
1148         softc = (struct cd_softc *)periph->softc;
1149
1150         /*
1151          * If this device isn't currently queued, and if it isn't
1152          * the active device, then we queue this device and run the
1153          * changer queue if there is no timeout scheduled to do it.
1154          * If this device is the active device, just schedule it
1155          * to run again.  If this device is queued, there should be
1156          * a timeout in place already that will make sure it runs.
1157          */
1158         if ((softc->pinfo.index == CAM_UNQUEUED_INDEX) 
1159          && ((softc->flags & CD_FLAG_ACTIVE) == 0)) {
1160                 /*
1161                  * We don't do anything with the priority here.
1162                  * This is strictly a fifo queue.
1163                  */
1164                 softc->pinfo.priority = 1;
1165                 softc->pinfo.generation = ++softc->changer->devq.generation;
1166                 camq_insert(&softc->changer->devq, (cam_pinfo *)softc);
1167
1168                 /*
1169                  * Since we just put a device in the changer queue,
1170                  * check and see if there is a timeout scheduled for
1171                  * this changer.  If so, let the timeout handle
1172                  * switching this device into the active slot.  If
1173                  * not, manually call the timeout routine to
1174                  * bootstrap things.
1175                  */
1176                 if (((softc->changer->flags & CHANGER_TIMEOUT_SCHED)==0)
1177                  && ((softc->changer->flags & CHANGER_NEED_TIMEOUT)==0)
1178                  && ((softc->changer->flags & CHANGER_SHORT_TMOUT_SCHED)==0)){
1179                         softc->changer->flags |= CHANGER_MANUAL_CALL;
1180                         cdrunchangerqueue(softc->changer);
1181                 }
1182         } else if ((softc->flags & CD_FLAG_ACTIVE)
1183                 && ((softc->flags & CD_FLAG_SCHED_ON_COMP) == 0))
1184                 xpt_schedule(periph, priority);
1185
1186         splx(s);
1187
1188 }
1189
1190 static void
1191 cdrunchangerqueue(void *arg)
1192 {
1193         struct cd_softc *softc;
1194         struct cdchanger *changer;
1195         int called_from_timeout;
1196         int s;
1197
1198         s = splsoftcam();
1199
1200         changer = (struct cdchanger *)arg;
1201
1202         /*
1203          * If we have NOT been called from cdstrategy() or cddone(), and
1204          * instead from a timeout routine, go ahead and clear the
1205          * timeout flag.
1206          */
1207         if ((changer->flags & CHANGER_MANUAL_CALL) == 0) {
1208                 changer->flags &= ~CHANGER_TIMEOUT_SCHED;
1209                 called_from_timeout = 1;
1210         } else
1211                 called_from_timeout = 0;
1212
1213         /* Always clear the manual call flag */
1214         changer->flags &= ~CHANGER_MANUAL_CALL;
1215
1216         /* nothing to do if the queue is empty */
1217         if (changer->devq.entries <= 0) {
1218                 splx(s);
1219                 return;
1220         }
1221
1222         /*
1223          * If the changer queue is frozen, that means we have an active
1224          * device.
1225          */
1226         if (changer->devq.qfrozen_cnt > 0) {
1227
1228                 if (changer->cur_device->device_stats.busy_count > 0) {
1229                         changer->cur_device->flags |= CD_FLAG_SCHED_ON_COMP;
1230                         changer->cur_device->bufs_left = 
1231                                 changer->cur_device->device_stats.busy_count;
1232                         if (called_from_timeout) {
1233                                 changer->long_handle =
1234                                         timeout(cdrunchangerqueue, changer,
1235                                         changer_max_busy_seconds * hz);
1236                                 changer->flags |= CHANGER_TIMEOUT_SCHED;
1237                         }
1238                         splx(s);
1239                         return;
1240                 }
1241
1242                 /*
1243                  * We always need to reset the frozen count and clear the
1244                  * active flag.
1245                  */
1246                 changer->devq.qfrozen_cnt--;
1247                 changer->cur_device->flags &= ~CD_FLAG_ACTIVE;
1248                 changer->cur_device->flags &= ~CD_FLAG_SCHED_ON_COMP;
1249
1250                 /*
1251                  * Check to see whether the current device has any I/O left
1252                  * to do.  If so, requeue it at the end of the queue.  If
1253                  * not, there is no need to requeue it.
1254                  */
1255                 if (bufq_first(&changer->cur_device->buf_queue) != NULL) {
1256
1257                         changer->cur_device->pinfo.generation =
1258                                 ++changer->devq.generation;
1259                         camq_insert(&changer->devq,
1260                                 (cam_pinfo *)changer->cur_device);
1261                 } 
1262         }
1263
1264         softc = (struct cd_softc *)camq_remove(&changer->devq, CAMQ_HEAD);
1265
1266         changer->cur_device = softc;
1267
1268         changer->devq.qfrozen_cnt++;
1269         softc->flags |= CD_FLAG_ACTIVE;
1270
1271         /* Just in case this device is waiting */
1272         wakeup(&softc->changer);
1273         xpt_schedule(softc->periph, /*priority*/ 1);
1274
1275         /*
1276          * Get rid of any pending timeouts, and set a flag to schedule new
1277          * ones so this device gets its full time quantum.
1278          */
1279         if (changer->flags & CHANGER_TIMEOUT_SCHED) {
1280                 untimeout(cdrunchangerqueue, changer, changer->long_handle);
1281                 changer->flags &= ~CHANGER_TIMEOUT_SCHED;
1282         }
1283
1284         if (changer->flags & CHANGER_SHORT_TMOUT_SCHED) {
1285                 untimeout(cdshorttimeout, changer, changer->short_handle);
1286                 changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
1287         }
1288
1289         /*
1290          * We need to schedule timeouts, but we only do this after the
1291          * first transaction has completed.  This eliminates the changer
1292          * switch time.
1293          */
1294         changer->flags |= CHANGER_NEED_TIMEOUT;
1295
1296         splx(s);
1297 }
1298
1299 static void
1300 cdchangerschedule(struct cd_softc *softc)
1301 {
1302         struct cdchanger *changer;
1303         int s;
1304
1305         s = splsoftcam();
1306
1307         changer = softc->changer;
1308
1309         /*
1310          * If this is a changer, and this is the current device,
1311          * and this device has at least the minimum time quantum to
1312          * run, see if we can switch it out.
1313          */
1314         if ((softc->flags & CD_FLAG_ACTIVE) 
1315          && ((changer->flags & CHANGER_SHORT_TMOUT_SCHED) == 0)
1316          && ((changer->flags & CHANGER_NEED_TIMEOUT) == 0)) {
1317                 /*
1318                  * We try three things here.  The first is that we
1319                  * check to see whether the schedule on completion
1320                  * flag is set.  If it is, we decrement the number
1321                  * of buffers left, and if it's zero, we reschedule.
1322                  * Next, we check to see whether the pending buffer
1323                  * queue is empty and whether there are no
1324                  * outstanding transactions.  If so, we reschedule.
1325                  * Next, we see if the pending buffer queue is empty.
1326                  * If it is, we set the number of buffers left to
1327                  * the current active buffer count and set the
1328                  * schedule on complete flag.
1329                  */
1330                 if (softc->flags & CD_FLAG_SCHED_ON_COMP) {
1331                         if (--softc->bufs_left == 0) {
1332                                 softc->changer->flags |=
1333                                         CHANGER_MANUAL_CALL;
1334                                 softc->flags &= ~CD_FLAG_SCHED_ON_COMP;
1335                                 cdrunchangerqueue(softc->changer);
1336                         }
1337                 } else if ((bufq_first(&softc->buf_queue) == NULL)
1338                         && (softc->device_stats.busy_count == 0)) {
1339                         softc->changer->flags |= CHANGER_MANUAL_CALL;
1340                         cdrunchangerqueue(softc->changer);
1341                 }
1342         } else if ((softc->changer->flags & CHANGER_NEED_TIMEOUT) 
1343                 && (softc->flags & CD_FLAG_ACTIVE)) {
1344
1345                 /*
1346                  * Now that the first transaction to this
1347                  * particular device has completed, we can go ahead
1348                  * and schedule our timeouts.
1349                  */
1350                 if ((changer->flags & CHANGER_TIMEOUT_SCHED) == 0) {
1351                         changer->long_handle =
1352                             timeout(cdrunchangerqueue, changer,
1353                                     changer_max_busy_seconds * hz);
1354                         changer->flags |= CHANGER_TIMEOUT_SCHED;
1355                 } else
1356                         printf("cdchangerschedule: already have a long"
1357                                " timeout!\n");
1358
1359                 if ((changer->flags & CHANGER_SHORT_TMOUT_SCHED) == 0) {
1360                         changer->short_handle =
1361                             timeout(cdshorttimeout, changer,
1362                                     changer_min_busy_seconds * hz);
1363                         changer->flags |= CHANGER_SHORT_TMOUT_SCHED;
1364                 } else
1365                         printf("cdchangerschedule: already have a short "
1366                                "timeout!\n");
1367
1368                 /*
1369                  * We just scheduled timeouts, no need to schedule
1370                  * more.
1371                  */
1372                 changer->flags &= ~CHANGER_NEED_TIMEOUT;
1373
1374         }
1375         splx(s);
1376 }
1377
1378 static int
1379 cdrunccb(union ccb *ccb, int (*error_routine)(union ccb *ccb,
1380                                               u_int32_t cam_flags,
1381                                               u_int32_t sense_flags),
1382          u_int32_t cam_flags, u_int32_t sense_flags)
1383 {
1384         struct cd_softc *softc;
1385         struct cam_periph *periph;
1386         int error;
1387
1388         periph = xpt_path_periph(ccb->ccb_h.path);
1389         softc = (struct cd_softc *)periph->softc;
1390
1391         error = cam_periph_runccb(ccb, error_routine, cam_flags, sense_flags,
1392                                   &softc->device_stats);
1393
1394         if (softc->flags & CD_FLAG_CHANGER)
1395                 cdchangerschedule(softc);
1396
1397         return(error);
1398 }
1399
1400 static union ccb *
1401 cdgetccb(struct cam_periph *periph, u_int32_t priority)
1402 {
1403         struct cd_softc *softc;
1404         int s;
1405
1406         softc = (struct cd_softc *)periph->softc;
1407
1408         if (softc->flags & CD_FLAG_CHANGER) {
1409
1410                 s = splsoftcam();
1411
1412                 /*
1413                  * This should work the first time this device is woken up,
1414                  * but just in case it doesn't, we use a while loop.
1415                  */
1416                 while ((softc->flags & CD_FLAG_ACTIVE) == 0) {
1417                         /*
1418                          * If this changer isn't already queued, queue it up.
1419                          */
1420                         if (softc->pinfo.index == CAM_UNQUEUED_INDEX) {
1421                                 softc->pinfo.priority = 1;
1422                                 softc->pinfo.generation =
1423                                         ++softc->changer->devq.generation;
1424                                 camq_insert(&softc->changer->devq,
1425                                             (cam_pinfo *)softc);
1426                         }
1427                         if (((softc->changer->flags & CHANGER_TIMEOUT_SCHED)==0)
1428                          && ((softc->changer->flags & CHANGER_NEED_TIMEOUT)==0)
1429                          && ((softc->changer->flags
1430                               & CHANGER_SHORT_TMOUT_SCHED)==0)) {
1431                                 softc->changer->flags |= CHANGER_MANUAL_CALL;
1432                                 cdrunchangerqueue(softc->changer);
1433                         } else
1434                                 tsleep(&softc->changer, 0, "cgticb", 0);
1435                 }
1436                 splx(s);
1437         }
1438         return(cam_periph_getccb(periph, priority));
1439 }
1440
1441
1442 /*
1443  * Actually translate the requested transfer into one the physical driver
1444  * can understand.  The transfer is described by a buf and will include
1445  * only one physical transfer.
1446  */
1447 static void
1448 cdstrategy(struct buf *bp)
1449 {
1450         struct cam_periph *periph;
1451         struct cd_softc *softc;
1452         u_int  unit, part;
1453         int    s;
1454
1455         unit = dkunit(bp->b_dev);
1456         part = dkpart(bp->b_dev);
1457         periph = cam_extend_get(cdperiphs, unit);
1458         if (periph == NULL) {
1459                 bp->b_error = ENXIO;
1460                 goto bad;
1461         }
1462
1463         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdstrategy\n"));
1464
1465         softc = (struct cd_softc *)periph->softc;
1466
1467         /*
1468          * Mask interrupts so that the pack cannot be invalidated until
1469          * after we are in the queue.  Otherwise, we might not properly
1470          * clean up one of the buffers.
1471          */
1472         s = splbio();
1473         
1474         /*
1475          * If the device has been made invalid, error out
1476          */
1477         if ((softc->flags & CD_FLAG_INVALID)) {
1478                 splx(s);
1479                 bp->b_error = ENXIO;
1480                 goto bad;
1481         }
1482
1483         /*
1484          * If we don't have valid media, look for it before trying to
1485          * schedule the I/O.
1486          */
1487         if ((softc->flags & CD_FLAG_VALID_MEDIA) == 0) {
1488                 int error;
1489
1490                 error = cdcheckmedia(periph);
1491                 if (error != 0) {
1492                         splx(s);
1493                         bp->b_error = error;
1494                         goto bad;
1495                 }
1496         }
1497
1498         /*
1499          * Place it in the queue of disk activities for this disk
1500          */
1501         bufqdisksort(&softc->buf_queue, bp);
1502
1503         splx(s);
1504         
1505         /*
1506          * Schedule ourselves for performing the work.  We do things
1507          * differently for changers.
1508          */
1509         if ((softc->flags & CD_FLAG_CHANGER) == 0)
1510                 xpt_schedule(periph, /* XXX priority */1);
1511         else
1512                 cdschedule(periph, /* priority */ 1);
1513
1514         return;
1515 bad:
1516         bp->b_flags |= B_ERROR;
1517         /*
1518          * Correctly set the buf to indicate a completed xfer
1519          */
1520         bp->b_resid = bp->b_bcount;
1521         biodone(bp);
1522         return;
1523 }
1524
1525 static void
1526 cdstart(struct cam_periph *periph, union ccb *start_ccb)
1527 {
1528         struct cd_softc *softc;
1529         struct buf *bp;
1530         struct ccb_scsiio *csio;
1531         struct scsi_read_capacity_data *rcap;
1532         int s;
1533
1534         softc = (struct cd_softc *)periph->softc;
1535
1536         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdstart\n"));
1537
1538         switch (softc->state) {
1539         case CD_STATE_NORMAL:
1540         {
1541                 int oldspl;
1542
1543                 s = splbio();
1544                 bp = bufq_first(&softc->buf_queue);
1545                 if (periph->immediate_priority <= periph->pinfo.priority) {
1546                         start_ccb->ccb_h.ccb_state = CD_CCB_WAITING;
1547
1548                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1549                                           periph_links.sle);
1550                         periph->immediate_priority = CAM_PRIORITY_NONE;
1551                         splx(s);
1552                         wakeup(&periph->ccb_list);
1553                 } else if (bp == NULL) {
1554                         splx(s);
1555                         xpt_release_ccb(start_ccb);
1556                 } else {
1557                         bufq_remove(&softc->buf_queue, bp);
1558
1559                         devstat_start_transaction(&softc->device_stats);
1560
1561                         scsi_read_write(&start_ccb->csio,
1562                                         /*retries*/4,
1563                                         /* cbfcnp */ cddone,
1564                                         (bp->b_flags & B_ORDERED) != 0 ?
1565                                             MSG_ORDERED_Q_TAG : 
1566                                             MSG_SIMPLE_Q_TAG,
1567                                         /* read */bp->b_flags & B_READ,
1568                                         /* byte2 */ 0,
1569                                         /* minimum_cmd_size */ 10,
1570                                         /* lba */ bp->b_pblkno,
1571                                         bp->b_bcount / softc->params.blksize,
1572                                         /* data_ptr */ bp->b_data,
1573                                         /* dxfer_len */ bp->b_bcount,
1574                                         /* sense_len */ SSD_FULL_SIZE,
1575                                         /* timeout */ 30000);
1576                         start_ccb->ccb_h.ccb_state = CD_CCB_BUFFER_IO;
1577
1578                         
1579                         /*
1580                          * Block out any asyncronous callbacks
1581                          * while we touch the pending ccb list.
1582                          */
1583                         oldspl = splcam();
1584                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1585                                          &start_ccb->ccb_h, periph_links.le);
1586                         splx(oldspl);
1587
1588                         /* We expect a unit attention from this device */
1589                         if ((softc->flags & CD_FLAG_RETRY_UA) != 0) {
1590                                 start_ccb->ccb_h.ccb_state |= CD_CCB_RETRY_UA;
1591                                 softc->flags &= ~CD_FLAG_RETRY_UA;
1592                         }
1593
1594                         start_ccb->ccb_h.ccb_bp = bp;
1595                         bp = bufq_first(&softc->buf_queue);
1596                         splx(s);
1597
1598                         xpt_action(start_ccb);
1599                 }
1600                 if (bp != NULL) {
1601                         /* Have more work to do, so ensure we stay scheduled */
1602                         xpt_schedule(periph, /* XXX priority */1);
1603                 }
1604                 break;
1605         }
1606         case CD_STATE_PROBE:
1607         {
1608
1609                 rcap = malloc(sizeof(*rcap), M_TEMP, M_INTWAIT);
1610                 csio = &start_ccb->csio;
1611                 scsi_read_capacity(csio,
1612                                    /*retries*/1,
1613                                    cddone,
1614                                    MSG_SIMPLE_Q_TAG,
1615                                    rcap,
1616                                    SSD_FULL_SIZE,
1617                                    /*timeout*/20000);
1618                 start_ccb->ccb_h.ccb_bp = NULL;
1619                 start_ccb->ccb_h.ccb_state = CD_CCB_PROBE;
1620                 xpt_action(start_ccb);
1621                 break;
1622         }
1623         }
1624 }
1625
1626 static void
1627 cddone(struct cam_periph *periph, union ccb *done_ccb)
1628
1629         struct cd_softc *softc;
1630         struct ccb_scsiio *csio;
1631
1632         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cddone\n"));
1633
1634         softc = (struct cd_softc *)periph->softc;
1635         csio = &done_ccb->csio;
1636
1637         switch (csio->ccb_h.ccb_state & CD_CCB_TYPE_MASK) {
1638         case CD_CCB_BUFFER_IO:
1639         {
1640                 struct buf      *bp;
1641                 int             error;
1642                 int             oldspl;
1643
1644                 bp = (struct buf *)done_ccb->ccb_h.ccb_bp;
1645                 error = 0;
1646
1647                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1648                         int sf;
1649
1650                         if ((done_ccb->ccb_h.ccb_state & CD_CCB_RETRY_UA) != 0)
1651                                 sf = SF_RETRY_UA;
1652                         else
1653                                 sf = 0;
1654
1655                         /* Retry selection timeouts */
1656                         sf |= SF_RETRY_SELTO;
1657
1658                         if ((error = cderror(done_ccb, 0, sf)) == ERESTART) {
1659                                 /*
1660                                  * A retry was scheuled, so
1661                                  * just return.
1662                                  */
1663                                 return;
1664                         }
1665                 }
1666
1667                 if (error != 0) {
1668                         int s;
1669                         struct buf *q_bp;
1670
1671                         xpt_print_path(periph->path);
1672                         printf("cddone: got error %#x back\n", error);
1673                         s = splbio();
1674                         while ((q_bp = bufq_first(&softc->buf_queue)) != NULL) {
1675                                 bufq_remove(&softc->buf_queue, q_bp);
1676                                 q_bp->b_resid = q_bp->b_bcount;
1677                                 q_bp->b_error = EIO;
1678                                 q_bp->b_flags |= B_ERROR;
1679                                 biodone(q_bp);
1680                         }
1681                         splx(s);
1682                         bp->b_resid = bp->b_bcount;
1683                         bp->b_error = error;
1684                         bp->b_flags |= B_ERROR;
1685                         cam_release_devq(done_ccb->ccb_h.path,
1686                                          /*relsim_flags*/0,
1687                                          /*reduction*/0,
1688                                          /*timeout*/0,
1689                                          /*getcount_only*/0);
1690
1691                 } else {
1692                         bp->b_resid = csio->resid;
1693                         bp->b_error = 0;
1694                         if (bp->b_resid != 0) {
1695                                 /* Short transfer ??? */
1696                                 bp->b_flags |= B_ERROR;
1697                         }
1698                 }
1699
1700                 /*
1701                  * Block out any asyncronous callbacks
1702                  * while we touch the pending ccb list.
1703                  */
1704                 oldspl = splcam();
1705                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1706                 splx(oldspl);
1707
1708                 if (softc->flags & CD_FLAG_CHANGER)
1709                         cdchangerschedule(softc);
1710
1711                 devstat_end_transaction_buf(&softc->device_stats, bp);
1712                 biodone(bp);
1713                 break;
1714         }
1715         case CD_CCB_PROBE:
1716         {
1717                 struct     scsi_read_capacity_data *rdcap;
1718                 char       announce_buf[120]; /*
1719                                                * Currently (9/30/97) the 
1720                                                * longest possible announce 
1721                                                * buffer is 108 bytes, for the 
1722                                                * first error case below.  
1723                                                * That is 39 bytes for the 
1724                                                * basic string, 16 bytes for the
1725                                                * biggest sense key (hardware 
1726                                                * error), 52 bytes for the
1727                                                * text of the largest sense 
1728                                                * qualifier valid for a CDROM,
1729                                                * (0x72, 0x03 or 0x04,
1730                                                * 0x03), and one byte for the
1731                                                * null terminating character.
1732                                                * To allow for longer strings, 
1733                                                * the announce buffer is 120
1734                                                * bytes.
1735                                                */
1736                 struct     cd_params *cdp;
1737
1738                 cdp = &softc->params;
1739
1740                 rdcap = (struct scsi_read_capacity_data *)csio->data_ptr;
1741                 
1742                 cdp->disksize = scsi_4btoul (rdcap->addr) + 1;
1743                 cdp->blksize = scsi_4btoul (rdcap->length);
1744
1745                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1746
1747                         snprintf(announce_buf, sizeof(announce_buf),
1748                                 "cd present [%lu x %lu byte records]",
1749                                 cdp->disksize, (u_long)cdp->blksize);
1750
1751                 } else {
1752                         int     error;
1753                         /*
1754                          * Retry any UNIT ATTENTION type errors.  They
1755                          * are expected at boot.
1756                          */
1757                         error = cderror(done_ccb, 0, SF_RETRY_UA |
1758                                         SF_NO_PRINT | SF_RETRY_SELTO);
1759                         if (error == ERESTART) {
1760                                 /*
1761                                  * A retry was scheuled, so
1762                                  * just return.
1763                                  */
1764                                 return;
1765                         } else if (error != 0) {
1766
1767                                 struct scsi_sense_data *sense;
1768                                 int asc, ascq;
1769                                 int sense_key, error_code;
1770                                 int have_sense;
1771                                 cam_status status;
1772                                 struct ccb_getdev cgd;
1773
1774                                 /* Don't wedge this device's queue */
1775                                 cam_release_devq(done_ccb->ccb_h.path,
1776                                                  /*relsim_flags*/0,
1777                                                  /*reduction*/0,
1778                                                  /*timeout*/0,
1779                                                  /*getcount_only*/0);
1780
1781                                 status = done_ccb->ccb_h.status;
1782
1783                                 xpt_setup_ccb(&cgd.ccb_h, 
1784                                               done_ccb->ccb_h.path,
1785                                               /* priority */ 1);
1786                                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1787                                 xpt_action((union ccb *)&cgd);
1788
1789                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1790                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1791                                  || ((status & CAM_AUTOSNS_VALID) == 0))
1792                                         have_sense = FALSE;
1793                                 else
1794                                         have_sense = TRUE;
1795
1796                                 if (have_sense) {
1797                                         sense = &csio->sense_data;
1798                                         scsi_extract_sense(sense, &error_code,
1799                                                            &sense_key, 
1800                                                            &asc, &ascq);
1801                                 }
1802                                 /*
1803                                  * Attach to anything that claims to be a
1804                                  * CDROM or WORM device, as long as it
1805                                  * doesn't return a "Logical unit not
1806                                  * supported" (0x25) error.
1807                                  */
1808                                 if ((have_sense) && (asc != 0x25)
1809                                  && (error_code == SSD_CURRENT_ERROR))
1810                                         snprintf(announce_buf,
1811                                             sizeof(announce_buf),
1812                                                 "Attempt to query device "
1813                                                 "size failed: %s, %s",
1814                                                 scsi_sense_key_text[sense_key],
1815                                                 scsi_sense_desc(asc,ascq,
1816                                                                 &cgd.inq_data));
1817                                 else if ((have_sense == 0)
1818                                       && ((status & CAM_STATUS_MASK) ==
1819                                            CAM_SCSI_STATUS_ERROR)
1820                                       && (csio->scsi_status ==
1821                                           SCSI_STATUS_BUSY)) {
1822                                         snprintf(announce_buf,
1823                                             sizeof(announce_buf),
1824                                             "Attempt to query device "
1825                                             "size failed: SCSI status: BUSY");
1826                                 } else if (SID_TYPE(&cgd.inq_data) == T_CDROM) {
1827                                         /*
1828                                          * We only print out an error for
1829                                          * CDROM type devices.  For WORM
1830                                          * devices, we don't print out an
1831                                          * error since a few WORM devices
1832                                          * don't support CDROM commands.
1833                                          * If we have sense information, go
1834                                          * ahead and print it out.
1835                                          * Otherwise, just say that we 
1836                                          * couldn't attach.
1837                                          */
1838
1839                                         /*
1840                                          * Just print out the error, not
1841                                          * the full probe message, when we
1842                                          * don't attach.
1843                                          */
1844                                         if (have_sense)
1845                                                 scsi_sense_print(
1846                                                         &done_ccb->csio);
1847                                         else {
1848                                                 xpt_print_path(periph->path);
1849                                                 printf("got CAM status %#x\n",
1850                                                        done_ccb->ccb_h.status);
1851                                         }
1852                                         xpt_print_path(periph->path);
1853                                         printf("fatal error, failed" 
1854                                                " to attach to device\n");
1855
1856                                         /*
1857                                          * Invalidate this peripheral.
1858                                          */
1859                                         cam_periph_invalidate(periph);
1860
1861                                         announce_buf[0] = '\0';
1862                                 } else {
1863
1864                                         /*
1865                                          * Invalidate this peripheral.
1866                                          */
1867                                         cam_periph_invalidate(periph);
1868                                         announce_buf[0] = '\0';
1869                                 }
1870                         }
1871                 }
1872                 free(rdcap, M_TEMP);
1873                 if (announce_buf[0] != '\0') {
1874                         xpt_announce_periph(periph, announce_buf);
1875                         if (softc->flags & CD_FLAG_CHANGER)
1876                                 cdchangerschedule(softc);
1877                         /*
1878                          * Create our sysctl variables, now that we know
1879                          * we have successfully attached.
1880                          */
1881                         taskqueue_enqueue(taskqueue_thread,&softc->sysctl_task);
1882                 }
1883                 softc->state = CD_STATE_NORMAL;         
1884                 /*
1885                  * Since our peripheral may be invalidated by an error
1886                  * above or an external event, we must release our CCB
1887                  * before releasing the probe lock on the peripheral.
1888                  * The peripheral will only go away once the last lock
1889                  * is removed, and we need it around for the CCB release
1890                  * operation.
1891                  */
1892                 xpt_release_ccb(done_ccb);
1893                 cam_periph_unlock(periph);
1894                 return;
1895         }
1896         case CD_CCB_WAITING:
1897         {
1898                 /* Caller will release the CCB */
1899                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 
1900                           ("trying to wakeup ccbwait\n"));
1901
1902                 wakeup(&done_ccb->ccb_h.cbfcnp);
1903                 return;
1904         }
1905         default:
1906                 break;
1907         }
1908         xpt_release_ccb(done_ccb);
1909 }
1910
1911 static union cd_pages *
1912 cdgetpage(struct cd_mode_params *mode_params)
1913 {
1914         union cd_pages *page;
1915
1916         if (mode_params->cdb_size == 10)
1917                 page = (union cd_pages *)find_mode_page_10(
1918                         (struct scsi_mode_header_10 *)mode_params->mode_buf);
1919         else
1920                 page = (union cd_pages *)find_mode_page_6(
1921                         (struct scsi_mode_header_6 *)mode_params->mode_buf);
1922
1923         return (page);
1924 }
1925
1926 static int
1927 cdgetpagesize(int page_num)
1928 {
1929         int i;
1930
1931         for (i = 0; i < (sizeof(cd_page_size_table)/
1932             sizeof(cd_page_size_table[0])); i++) {
1933                 if (cd_page_size_table[i].page == page_num)
1934                         return (cd_page_size_table[i].page_size);
1935         }
1936         return (-1);
1937 }
1938
1939 static int
1940 cdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1941 {
1942
1943         struct  cam_periph *periph;
1944         struct  cd_softc *softc;
1945         int     error, unit;
1946
1947         unit = dkunit(dev);
1948
1949         periph = cam_extend_get(cdperiphs, unit);
1950         if (periph == NULL)
1951                 return(ENXIO);  
1952
1953         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdioctl\n"));
1954
1955         softc = (struct cd_softc *)periph->softc;
1956
1957         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 
1958                   ("trying to do ioctl %#lx\n", cmd));
1959
1960         error = cam_periph_lock(periph, PCATCH);
1961
1962         if (error != 0)
1963                 return(error);
1964
1965         /*
1966          * If we don't have media loaded, check for it.  If still don't
1967          * have media loaded, we can only do a load or eject.
1968          */
1969         if (((softc->flags & CD_FLAG_VALID_MEDIA) == 0)
1970             && ((cmd != CDIOCCLOSE)
1971             && (cmd != CDIOCEJECT))) {
1972                 error = cdcheckmedia(periph);
1973                 if (error != 0) {
1974                         cam_periph_unlock(periph);
1975                         return (error);
1976                 }
1977         }
1978
1979         switch (cmd) {
1980
1981         case CDIOCPLAYTRACKS:
1982                 {
1983                         struct ioc_play_track *args
1984                             = (struct ioc_play_track *) addr;
1985                         struct cd_mode_params params;
1986                         union cd_pages *page;
1987
1988                         params.alloc_len = sizeof(union cd_mode_data_6_10);
1989                         params.mode_buf = malloc(params.alloc_len, M_TEMP,
1990                                                  M_WAITOK | M_ZERO);
1991
1992                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
1993                                   ("trying to do CDIOCPLAYTRACKS\n"));
1994
1995                         error = cdgetmode(periph, &params, AUDIO_PAGE);
1996                         if (error) {
1997                                 free(params.mode_buf, M_TEMP);
1998                                 break;
1999                         }
2000                         page = cdgetpage(&params);
2001
2002                         page->audio.flags &= ~CD_PA_SOTC;
2003                         page->audio.flags |= CD_PA_IMMED;
2004                         error = cdsetmode(periph, &params);
2005                         free(params.mode_buf, M_TEMP);
2006                         if (error)
2007                                 break;
2008
2009                         /*
2010                          * This was originally implemented with the PLAY
2011                          * AUDIO TRACK INDEX command, but that command was
2012                          * deprecated after SCSI-2.  Most (all?) SCSI CDROM
2013                          * drives support it but ATAPI and ATAPI-derivative
2014                          * drives don't seem to support it.  So we keep a
2015                          * cache of the table of contents and translate
2016                          * track numbers to MSF format.
2017                          */
2018                         if (softc->flags & CD_FLAG_VALID_TOC) {
2019                                 union msf_lba *sentry, *eentry;
2020                                 int st, et;
2021
2022                                 if (args->end_track <
2023                                     softc->toc.header.ending_track + 1)
2024                                         args->end_track++;
2025                                 if (args->end_track >
2026                                     softc->toc.header.ending_track + 1)
2027                                         args->end_track =
2028                                             softc->toc.header.ending_track + 1;
2029                                 st = args->start_track -
2030                                         softc->toc.header.starting_track;
2031                                 et = args->end_track -
2032                                         softc->toc.header.starting_track;
2033                                 if ((st < 0)
2034                                  || (et < 0)
2035                                  || (st > (softc->toc.header.ending_track -
2036                                      softc->toc.header.starting_track))) {
2037                                         error = EINVAL;
2038                                         break;
2039                                 }
2040                                 sentry = &softc->toc.entries[st].addr;
2041                                 eentry = &softc->toc.entries[et].addr;
2042                                 error = cdplaymsf(periph,
2043                                                   sentry->msf.minute,
2044                                                   sentry->msf.second,
2045                                                   sentry->msf.frame,
2046                                                   eentry->msf.minute,
2047                                                   eentry->msf.second,
2048                                                   eentry->msf.frame);
2049                         } else {
2050                                 /*
2051                                  * If we don't have a valid TOC, try the
2052                                  * play track index command.  It is part of
2053                                  * the SCSI-2 spec, but was removed in the
2054                                  * MMC specs.  ATAPI and ATAPI-derived
2055                                  * drives don't support it.
2056                                  */
2057                                 if (softc->quirks & CD_Q_BCD_TRACKS) {
2058                                         args->start_track =
2059                                                 bin2bcd(args->start_track);
2060                                         args->end_track =
2061                                                 bin2bcd(args->end_track);
2062                                 }
2063                                 error = cdplaytracks(periph,
2064                                                      args->start_track,
2065                                                      args->start_index,
2066                                                      args->end_track,
2067                                                      args->end_index);
2068                         }
2069                 }
2070                 break;
2071         case CDIOCPLAYMSF:
2072                 {
2073                         struct ioc_play_msf *args
2074                                 = (struct ioc_play_msf *) addr;
2075                         struct cd_mode_params params;
2076                         union cd_pages *page;
2077
2078                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2079                         params.mode_buf = malloc(params.alloc_len, M_TEMP,
2080                                                  M_WAITOK | M_ZERO);
2081
2082                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2083                                   ("trying to do CDIOCPLAYMSF\n"));
2084
2085                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2086                         if (error) {
2087                                 free(params.mode_buf, M_TEMP);
2088                                 break;
2089                         }
2090                         page = cdgetpage(&params);
2091
2092                         page->audio.flags &= ~CD_PA_SOTC;
2093                         page->audio.flags |= CD_PA_IMMED;
2094                         error = cdsetmode(periph, &params);
2095                         free(params.mode_buf, M_TEMP);
2096                         if (error)
2097                                 break;
2098                         error = cdplaymsf(periph,
2099                                           args->start_m,
2100                                           args->start_s,
2101                                           args->start_f,
2102                                           args->end_m,
2103                                           args->end_s,
2104                                           args->end_f);
2105                 }
2106                 break;
2107         case CDIOCPLAYBLOCKS:
2108                 {
2109                         struct ioc_play_blocks *args
2110                                 = (struct ioc_play_blocks *) addr;
2111                         struct cd_mode_params params;
2112                         union cd_pages *page;
2113
2114                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2115                                   ("trying to do CDIOCPLAYBLOCKS\n"));
2116
2117                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2118                         params.mode_buf = malloc(params.alloc_len, M_TEMP,
2119                                                  M_WAITOK | M_ZERO);
2120
2121                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2122                         if (error) {
2123                                 free(params.mode_buf, M_TEMP);
2124                                 break;
2125                         }
2126                         page = cdgetpage(&params);
2127
2128                         page->audio.flags &= ~CD_PA_SOTC;
2129                         page->audio.flags |= CD_PA_IMMED;
2130                         error = cdsetmode(periph, &params);
2131                         free(params.mode_buf, M_TEMP);
2132                         if (error)
2133                                 break;
2134                         error = cdplay(periph, args->blk, args->len);
2135                 }
2136                 break;
2137         case CDIOCREADSUBCHANNEL:
2138                 {
2139                         struct ioc_read_subchannel *args
2140                                 = (struct ioc_read_subchannel *) addr;
2141                         struct cd_sub_channel_info *data;
2142                         u_int32_t len = args->data_len;
2143
2144                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2145                                   ("trying to do CDIOCREADSUBCHANNEL\n"));
2146
2147                         data = malloc(sizeof(struct cd_sub_channel_info), 
2148                                       M_TEMP, M_WAITOK);
2149
2150                         if ((len > sizeof(struct cd_sub_channel_info)) ||
2151                             (len < sizeof(struct cd_sub_channel_header))) {
2152                                 printf(
2153                                         "scsi_cd: cdioctl: "
2154                                         "cdioreadsubchannel: error, len=%d\n",
2155                                         len);
2156                                 error = EINVAL;
2157                                 free(data, M_TEMP);
2158                                 break;
2159                         }
2160
2161                         if (softc->quirks & CD_Q_BCD_TRACKS)
2162                                 args->track = bin2bcd(args->track);
2163
2164                         error = cdreadsubchannel(periph, args->address_format,
2165                                 args->data_format, args->track, data, len);
2166
2167                         if (error) {
2168                                 free(data, M_TEMP);
2169                                 break;
2170                         }
2171                         if (softc->quirks & CD_Q_BCD_TRACKS)
2172                                 data->what.track_info.track_number =
2173                                     bcd2bin(data->what.track_info.track_number);
2174                         len = min(len, ((data->header.data_len[0] << 8) +
2175                                 data->header.data_len[1] +
2176                                 sizeof(struct cd_sub_channel_header)));
2177                         if (copyout(data, args->data, len) != 0) {
2178                                 error = EFAULT;
2179                         }
2180                         free(data, M_TEMP);
2181                 }
2182                 break;
2183
2184         case CDIOREADTOCHEADER:
2185                 {
2186                         struct ioc_toc_header *th;
2187
2188                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2189                                   ("trying to do CDIOREADTOCHEADER\n"));
2190
2191                         th = malloc(sizeof(struct ioc_toc_header), M_TEMP,
2192                                     M_WAITOK);
2193                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th, 
2194                                           sizeof (*th), /*sense_flags*/0);
2195                         if (error) {
2196                                 free(th, M_TEMP);
2197                                 break;
2198                         }
2199                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2200                                 /* we are going to have to convert the BCD
2201                                  * encoding on the cd to what is expected
2202                                  */
2203                                 th->starting_track = 
2204                                         bcd2bin(th->starting_track);
2205                                 th->ending_track = bcd2bin(th->ending_track);
2206                         }
2207                         NTOHS(th->len);
2208                         bcopy(th, addr, sizeof(*th));
2209                         free(th, M_TEMP);
2210                 }
2211                 break;
2212         case CDIOREADTOCENTRYS:
2213                 {
2214                         struct cd_tocdata *data;
2215                         struct cd_toc_single *lead;
2216                         struct ioc_read_toc_entry *te =
2217                                 (struct ioc_read_toc_entry *) addr;
2218                         struct ioc_toc_header *th;
2219                         u_int32_t len, readlen, idx, num;
2220                         u_int32_t starting_track = te->starting_track;
2221
2222                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2223                                   ("trying to do CDIOREADTOCENTRYS\n"));
2224
2225                         data = malloc(sizeof(*data), M_TEMP, M_WAITOK);
2226                         lead = malloc(sizeof(*lead), M_TEMP, M_WAITOK);
2227
2228                         if (te->data_len < sizeof(struct cd_toc_entry)
2229                          || (te->data_len % sizeof(struct cd_toc_entry)) != 0
2230                          || (te->address_format != CD_MSF_FORMAT
2231                           && te->address_format != CD_LBA_FORMAT)) {
2232                                 error = EINVAL;
2233                                 printf("scsi_cd: error in readtocentries, "
2234                                        "returning EINVAL\n");
2235                                 free(data, M_TEMP);
2236                                 free(lead, M_TEMP);
2237                                 break;
2238                         }
2239
2240                         th = &data->header;
2241                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th, 
2242                                           sizeof (*th), /*sense_flags*/0);
2243                         if (error) {
2244                                 free(data, M_TEMP);
2245                                 free(lead, M_TEMP);
2246                                 break;
2247                         }
2248
2249                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2250                                 /* we are going to have to convert the BCD
2251                                  * encoding on the cd to what is expected
2252                                  */
2253                                 th->starting_track =
2254                                     bcd2bin(th->starting_track);
2255                                 th->ending_track = bcd2bin(th->ending_track);
2256                         }
2257
2258                         if (starting_track == 0)
2259                                 starting_track = th->starting_track;
2260                         else if (starting_track == LEADOUT)
2261                                 starting_track = th->ending_track + 1;
2262                         else if (starting_track < th->starting_track ||
2263                                  starting_track > th->ending_track + 1) {
2264                                 printf("scsi_cd: error in readtocentries, "
2265                                        "returning EINVAL\n");
2266                                 free(data, M_TEMP);
2267                                 free(lead, M_TEMP);
2268                                 error = EINVAL;
2269                                 break;
2270                         }
2271
2272                         /* calculate reading length without leadout entry */
2273                         readlen = (th->ending_track - starting_track + 1) *
2274                                   sizeof(struct cd_toc_entry);
2275
2276                         /* and with leadout entry */
2277                         len = readlen + sizeof(struct cd_toc_entry);
2278                         if (te->data_len < len) {
2279                                 len = te->data_len;
2280                                 if (readlen > len)
2281                                         readlen = len;
2282                         }
2283                         if (len > sizeof(data->entries)) {
2284                                 printf("scsi_cd: error in readtocentries, "
2285                                        "returning EINVAL\n");
2286                                 error = EINVAL;
2287                                 free(data, M_TEMP);
2288                                 free(lead, M_TEMP);
2289                                 break;
2290                         }
2291                         num = len / sizeof(struct cd_toc_entry);
2292
2293                         if (readlen > 0) {
2294                                 error = cdreadtoc(periph, te->address_format,
2295                                                   starting_track,
2296                                                   (u_int8_t *)data,
2297                                                   readlen + sizeof (*th),
2298                                                   /*sense_flags*/0);
2299                                 if (error) {
2300                                         free(data, M_TEMP);
2301                                         free(lead, M_TEMP);
2302                                         break;
2303                                 }
2304                         }
2305
2306                         /* make leadout entry if needed */
2307                         idx = starting_track + num - 1;
2308                         if (softc->quirks & CD_Q_BCD_TRACKS)
2309                                 th->ending_track = bcd2bin(th->ending_track);
2310                         if (idx == th->ending_track + 1) {
2311                                 error = cdreadtoc(periph, te->address_format,
2312                                                   LEADOUT, (u_int8_t *)lead,
2313                                                   sizeof(*lead),
2314                                                   /*sense_flags*/0);
2315                                 if (error) {
2316                                         free(data, M_TEMP);
2317                                         free(lead, M_TEMP);
2318                                         break;
2319                                 }
2320                                 data->entries[idx - starting_track] = 
2321                                         lead->entry;
2322                         }
2323                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2324                                 for (idx = 0; idx < num - 1; idx++) {
2325                                         data->entries[idx].track =
2326                                             bcd2bin(data->entries[idx].track);
2327                                 }
2328                         }
2329
2330                         error = copyout(data->entries, te->data, len);
2331                         free(data, M_TEMP);
2332                         free(lead, M_TEMP);
2333                 }
2334                 break;
2335         case CDIOREADTOCENTRY:
2336                 {
2337                         struct cd_toc_single *data;
2338                         struct ioc_read_toc_single_entry *te =
2339                                 (struct ioc_read_toc_single_entry *) addr;
2340                         struct ioc_toc_header *th;
2341                         u_int32_t track;
2342
2343                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2344                                   ("trying to do CDIOREADTOCENTRY\n"));
2345
2346                         data = malloc(sizeof(*data), M_TEMP, M_WAITOK);
2347
2348                         if (te->address_format != CD_MSF_FORMAT
2349                             && te->address_format != CD_LBA_FORMAT) {
2350                                 printf("error in readtocentry, "
2351                                        " returning EINVAL\n");
2352                                 free(data, M_TEMP);
2353                                 error = EINVAL;
2354                                 break;
2355                         }
2356
2357                         th = &data->header;
2358                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th,
2359                                           sizeof (*th), /*sense_flags*/0);
2360                         if (error) {
2361                                 free(data, M_TEMP);
2362                                 break;
2363                         }
2364
2365                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2366                                 /* we are going to have to convert the BCD
2367                                  * encoding on the cd to what is expected
2368                                  */
2369                                 th->starting_track =
2370                                     bcd2bin(th->starting_track);
2371                                 th->ending_track = bcd2bin(th->ending_track);
2372                         }
2373                         track = te->track;
2374                         if (track == 0)
2375                                 track = th->starting_track;
2376                         else if (track == LEADOUT)
2377                                 /* OK */;
2378                         else if (track < th->starting_track ||
2379                                  track > th->ending_track + 1) {
2380                                 printf("error in readtocentry, "
2381                                        " returning EINVAL\n");
2382                                 free(data, M_TEMP);
2383                                 error = EINVAL;
2384                                 break;
2385                         }
2386
2387                         error = cdreadtoc(periph, te->address_format, track,
2388                                           (u_int8_t *)data, sizeof(*data),
2389                                           /*sense_flags*/0);
2390                         if (error) {
2391                                 free(data, M_TEMP);
2392                                 break;
2393                         }
2394
2395                         if (softc->quirks & CD_Q_BCD_TRACKS)
2396                                 data->entry.track = bcd2bin(data->entry.track);
2397                         bcopy(&data->entry, &te->entry,
2398                               sizeof(struct cd_toc_entry));
2399                         free(data, M_TEMP);
2400                 }
2401                 break;
2402         case CDIOCSETPATCH:
2403                 {
2404                         struct ioc_patch *arg = (struct ioc_patch *)addr;
2405                         struct cd_mode_params params;
2406                         union cd_pages *page;
2407
2408                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2409                                   ("trying to do CDIOCSETPATCH\n"));
2410
2411                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2412                         params.mode_buf = malloc(params.alloc_len, M_TEMP, 
2413                                                  M_WAITOK | M_ZERO);
2414                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2415                         if (error) {
2416                                 free(params.mode_buf, M_TEMP);
2417                                 break;
2418                         }
2419                         page = cdgetpage(&params);
2420
2421                         page->audio.port[LEFT_PORT].channels = 
2422                                 arg->patch[0];
2423                         page->audio.port[RIGHT_PORT].channels = 
2424                                 arg->patch[1];
2425                         page->audio.port[2].channels = arg->patch[2];
2426                         page->audio.port[3].channels = arg->patch[3];
2427                         error = cdsetmode(periph, &params);
2428                         free(params.mode_buf, M_TEMP);
2429                 }
2430                 break;
2431         case CDIOCGETVOL:
2432                 {
2433                         struct ioc_vol *arg = (struct ioc_vol *) addr;
2434                         struct cd_mode_params params;
2435                         union cd_pages *page;
2436
2437                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2438                                   ("trying to do CDIOCGETVOL\n"));
2439
2440                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2441                         params.mode_buf = malloc(params.alloc_len, M_TEMP, 
2442                                                  M_WAITOK | M_ZERO);
2443                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2444                         if (error) {
2445                                 free(params.mode_buf, M_TEMP);
2446                                 break;
2447                         }
2448                         page = cdgetpage(&params);
2449
2450                         arg->vol[LEFT_PORT] = 
2451                                 page->audio.port[LEFT_PORT].volume;
2452                         arg->vol[RIGHT_PORT] = 
2453                                 page->audio.port[RIGHT_PORT].volume;
2454                         arg->vol[2] = page->audio.port[2].volume;
2455                         arg->vol[3] = page->audio.port[3].volume;
2456                         free(params.mode_buf, M_TEMP);
2457                 }
2458                 break;
2459         case CDIOCSETVOL:
2460                 {
2461                         struct ioc_vol *arg = (struct ioc_vol *) addr;
2462                         struct cd_mode_params params;
2463                         union cd_pages *page;
2464
2465                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2466                                   ("trying to do CDIOCSETVOL\n"));
2467
2468                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2469                         params.mode_buf = malloc(params.alloc_len, M_TEMP, 
2470                                                  M_WAITOK | M_ZERO);
2471                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2472                         if (error) {
2473                                 free(params.mode_buf, M_TEMP);
2474                                 break;
2475                         }
2476                         page = cdgetpage(&params);
2477
2478                         page->audio.port[LEFT_PORT].channels = CHANNEL_0;
2479                         page->audio.port[LEFT_PORT].volume = 
2480                                 arg->vol[LEFT_PORT];
2481                         page->audio.port[RIGHT_PORT].channels = CHANNEL_1;
2482                         page->audio.port[RIGHT_PORT].volume = 
2483                                 arg->vol[RIGHT_PORT];
2484                         page->audio.port[2].volume = arg->vol[2];
2485                         page->audio.port[3].volume = arg->vol[3];
2486                         error = cdsetmode(periph, &params);
2487                         free(params.mode_buf, M_TEMP);
2488                 }
2489                 break;
2490         case CDIOCSETMONO:
2491                 {
2492                         struct cd_mode_params params;
2493                         union cd_pages *page;
2494
2495                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2496                                   ("trying to do CDIOCSETMONO\n"));
2497
2498                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2499                         params.mode_buf = malloc(params.alloc_len, M_TEMP,
2500                                                  M_WAITOK | M_ZERO);
2501                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2502                         if (error) {
2503                                 free(params.mode_buf, M_TEMP);
2504                                 break;
2505                         }
2506                         page = cdgetpage(&params);
2507
2508                         page->audio.port[LEFT_PORT].channels = 
2509                                 LEFT_CHANNEL | RIGHT_CHANNEL;
2510                         page->audio.port[RIGHT_PORT].channels = 
2511                                 LEFT_CHANNEL | RIGHT_CHANNEL;
2512                         page->audio.port[2].channels = 0;
2513                         page->audio.port[3].channels = 0;
2514                         error = cdsetmode(periph, &params);
2515                         free(params.mode_buf, M_TEMP);
2516                 }
2517                 break;
2518         case CDIOCSETSTEREO:
2519                 {
2520                         struct cd_mode_params params;
2521                         union cd_pages *page;
2522
2523                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2524                                   ("trying to do CDIOCSETSTEREO\n"));
2525
2526                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2527                         params.mode_buf = malloc(params.alloc_len, M_TEMP,
2528                                                  M_WAITOK | M_ZERO);
2529                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2530                         if (error) {
2531                                 free(params.mode_buf, M_TEMP);
2532                                 break;
2533                         }
2534                         page = cdgetpage(&params);
2535
2536                         page->audio.port[LEFT_PORT].channels = 
2537                                 LEFT_CHANNEL;
2538                         page->audio.port[RIGHT_PORT].channels = 
2539                                 RIGHT_CHANNEL;
2540                         page->audio.port[2].channels = 0;
2541                         page->audio.port[3].channels = 0;
2542                         error = cdsetmode(periph, &params);
2543                         free(params.mode_buf, M_TEMP);
2544                 }
2545                 break;
2546         case CDIOCSETMUTE:
2547                 {
2548                         struct cd_mode_params params;
2549                         union cd_pages *page;
2550
2551                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2552                                   ("trying to do CDIOCSETMUTE\n"));
2553
2554                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2555                         params.mode_buf = malloc(params.alloc_len, M_TEMP,
2556                                                  M_WAITOK | M_ZERO);
2557                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2558                         if (error) {
2559                                 free(&params, M_TEMP);
2560                                 break;
2561                         }
2562                         page = cdgetpage(&params);
2563
2564                         page->audio.port[LEFT_PORT].channels = 0;
2565                         page->audio.port[RIGHT_PORT].channels = 0;
2566                         page->audio.port[2].channels = 0;
2567                         page->audio.port[3].channels = 0;
2568                         error = cdsetmode(periph, &params);
2569                         free(params.mode_buf, M_TEMP);
2570                 }
2571                 break;
2572         case CDIOCSETLEFT:
2573                 {
2574                         struct cd_mode_params params;
2575                         union cd_pages *page;
2576
2577                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2578                                   ("trying to do CDIOCSETLEFT\n"));
2579
2580                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2581                         params.mode_buf = malloc(params.alloc_len, M_TEMP,
2582                                                  M_WAITOK | M_ZERO);
2583                         
2584                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2585                         if (error) {
2586                                 free(params.mode_buf, M_TEMP);
2587                                 break;
2588                         }
2589                         page = cdgetpage(&params);
2590
2591                         page->audio.port[LEFT_PORT].channels = LEFT_CHANNEL;
2592                         page->audio.port[RIGHT_PORT].channels = LEFT_CHANNEL;
2593                         page->audio.port[2].channels = 0;
2594                         page->audio.port[3].channels = 0;
2595                         error = cdsetmode(periph, &params);
2596                         free(params.mode_buf, M_TEMP);
2597                 }
2598                 break;
2599         case CDIOCSETRIGHT:
2600                 {
2601                         struct cd_mode_params params;
2602                         union cd_pages *page;
2603
2604                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE, 
2605                                   ("trying to do CDIOCSETRIGHT\n"));
2606
2607                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2608                         params.mode_buf = malloc(params.alloc_len, M_TEMP,
2609                                                  M_WAITOK | M_ZERO);
2610
2611                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2612                         if (error) {
2613                                 free(params.mode_buf, M_TEMP);
2614                                 break;
2615                         }
2616                         page = cdgetpage(&params);
2617
2618                         page->audio.port[LEFT_PORT].channels = RIGHT_CHANNEL;
2619                         page->audio.port[RIGHT_PORT].channels = RIGHT_CHANNEL;
2620                         page->audio.port[2].channels = 0;
2621                         page->audio.port[3].channels = 0;
2622                         error = cdsetmode(periph, &params);
2623                         free(params.mode_buf, M_TEMP);
2624                 }
2625                 break;
2626         case CDIOCRESUME:
2627                 error = cdpause(periph, 1);
2628                 break;
2629         case CDIOCPAUSE:
2630                 error = cdpause(periph, 0);
2631                 break;
2632         case CDIOCSTART:
2633                 error = cdstartunit(periph, 0);
2634                 break;
2635         case CDIOCCLOSE:
2636                 error = cdstartunit(periph, 1);
2637
2638 #ifdef notyet
2639                 if (error != 0)
2640                         break;
2641
2642                 /*
2643                  * The user successfully closed the tray, run
2644                  * cdcheckmedia() again so we can re-sync the disklabel
2645                  * information.
2646                  */
2647                 cdcheckmedia(periph);
2648 #endif /* notyet */
2649                 break;
2650         case CDIOCSTOP:
2651                 error = cdstopunit(periph, 0);
2652                 break;
2653         case CDIOCEJECT:
2654                 error = cdstopunit(periph, 1);
2655
2656 #ifdef notyet
2657                 if (error != 0)
2658                         break;
2659
2660                 /*
2661                  * Since we've successfully ejected the media, run
2662                  * cdcheckmedia() again so we re-sync the disklabel
2663                  * information.
2664                  */
2665                 cdcheckmedia(periph);
2666 #endif /* notyet */
2667                 break;
2668         case CDIOCALLOW:
2669                 cdprevent(periph, PR_ALLOW);
2670                 break;
2671         case CDIOCPREVENT:
2672                 cdprevent(periph, PR_PREVENT);
2673                 break;
2674         case CDIOCSETDEBUG:
2675                 /* sc_link->flags |= (SDEV_DB1 | SDEV_DB2); */
2676                 error = ENOTTY;
2677                 break;
2678         case CDIOCCLRDEBUG:
2679                 /* sc_link->flags &= ~(SDEV_DB1 | SDEV_DB2); */
2680                 error = ENOTTY;
2681                 break;
2682         case CDIOCRESET:
2683                 /* return (cd_reset(periph)); */
2684                 error = ENOTTY;
2685                 break;
2686         case CDRIOCREADSPEED:
2687                 error = cdsetspeed(periph, *(u_int32_t *)addr, CDR_MAX_SPEED);
2688                 break;
2689         case CDRIOCWRITESPEED:
2690                 error = cdsetspeed(periph, CDR_MAX_SPEED, *(u_int32_t *)addr);
2691                 break;
2692         case DVDIOCSENDKEY:
2693         case DVDIOCREPORTKEY: {
2694                 struct dvd_authinfo *authinfo;
2695
2696                 authinfo = (struct dvd_authinfo *)addr;
2697
2698                 if (cmd == DVDIOCREPORTKEY)
2699                         error = cdreportkey(periph, authinfo);
2700                 else
2701                         error = cdsendkey(periph, authinfo);
2702                 break;
2703         }
2704         case DVDIOCREADSTRUCTURE: {
2705                 struct dvd_struct *dvdstruct;
2706
2707                 dvdstruct = (struct dvd_struct *)addr;
2708
2709                 error = cdreaddvdstructure(periph, dvdstruct);
2710
2711                 break;
2712         }
2713         default:
2714                 error = cam_periph_ioctl(periph, cmd, addr, cderror);
2715                 break;
2716         }
2717
2718         cam_periph_unlock(periph);
2719
2720         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("leaving cdioctl\n"));
2721
2722         return (error);
2723 }
2724
2725 static void
2726 cdprevent(struct cam_periph *periph, int action)
2727 {
2728         union   ccb *ccb;
2729         struct  cd_softc *softc;
2730         int     error;
2731
2732         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdprevent\n"));
2733
2734         softc = (struct cd_softc *)periph->softc;
2735         
2736         if (((action == PR_ALLOW)
2737           && (softc->flags & CD_FLAG_DISC_LOCKED) == 0)
2738          || ((action == PR_PREVENT)
2739           && (softc->flags & CD_FLAG_DISC_LOCKED) != 0)) {
2740                 return;
2741         }
2742             
2743         ccb = cdgetccb(periph, /* priority */ 1);
2744
2745         scsi_prevent(&ccb->csio, 
2746                      /*retries*/ 1,
2747                      cddone,
2748                      MSG_SIMPLE_Q_TAG,
2749                      action,
2750                      SSD_FULL_SIZE,
2751                      /* timeout */60000);
2752         
2753         error = cdrunccb(ccb, cderror, /*cam_flags*/0,
2754                         /*sense_flags*/SF_RETRY_UA|SF_NO_PRINT|SF_RETRY_SELTO);
2755
2756         xpt_release_ccb(ccb);
2757
2758         if (error == 0) {
2759                 if (action == PR_ALLOW)
2760                         softc->flags &= ~CD_FLAG_DISC_LOCKED;
2761                 else
2762                         softc->flags |= CD_FLAG_DISC_LOCKED;
2763         }
2764 }
2765
2766 int
2767 cdcheckmedia(struct cam_periph *periph)
2768 {
2769         struct cd_softc *softc;
2770         struct ioc_toc_header *toch;
2771         struct cd_toc_single leadout;
2772         struct ccb_getdev cgd;
2773         u_int32_t size, toclen;
2774         int error, num_entries, cdindex;
2775         int first_track_audio;
2776         struct disklabel *label;
2777
2778         softc = (struct cd_softc *)periph->softc;
2779
2780         first_track_audio = -1;
2781         error = 0;
2782
2783         cdprevent(periph, PR_PREVENT);
2784
2785         /*
2786          * Build prototype label for whole disk.
2787          * Should take information about different data tracks from the
2788          * TOC and put it in the partition table.
2789          */
2790         label = &softc->disk.d_label;
2791         bzero(label, sizeof(*label));
2792         label->d_type = DTYPE_SCSI;
2793
2794         /*
2795          * Grab the inquiry data to get the vendor and product names.
2796          * Put them in the typename and packname for the label.
2797          */
2798         xpt_setup_ccb(&cgd.ccb_h, periph->path, /*priority*/ 1);
2799         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2800         xpt_action((union ccb *)&cgd);
2801
2802         strncpy(label->d_typename, cgd.inq_data.vendor,
2803                 min(SID_VENDOR_SIZE, sizeof(label->d_typename)));
2804         strncpy(label->d_packname, cgd.inq_data.product,
2805                 min(SID_PRODUCT_SIZE, sizeof(label->d_packname)));
2806                 
2807         label->d_flags = D_REMOVABLE;
2808         /*
2809          * Make partition 'a' cover the whole disk.  This is a temporary
2810          * compatibility hack.  The 'a' partition should not exist, so
2811          * the slice code won't create it.  The slice code will make
2812          * partition (RAW_PART + 'a') cover the whole disk and fill in
2813          * some more defaults.
2814          */
2815         label->d_partitions[0].p_size = label->d_secperunit;
2816         label->d_partitions[0].p_fstype = FS_OTHER;
2817
2818         /*
2819          * Default to not reading the disklabel off the disk, until we can
2820          * verify that we have media, that we have a table of contents, and
2821          * that the first track is a data track (which could theoretically
2822          * contain a disklabel).
2823          */
2824         softc->disk.d_dsflags &= ~DSO_COMPATLABEL;
2825         softc->disk.d_dsflags |= DSO_NOLABELS;
2826
2827         /*
2828          * Clear the valid media and TOC flags until we've verified that we
2829          * have both.
2830          */
2831         softc->flags &= ~(CD_FLAG_VALID_MEDIA|CD_FLAG_VALID_TOC);
2832
2833         /*
2834          * Get the disc size and block size.  If we can't get it, we don't
2835          * have media, most likely.
2836          */
2837         if ((error = cdsize(periph, &size)) != 0) {
2838                 /*
2839                  * Set a bogus sector size, so the slice code won't try to
2840                  * divide by 0 and panic the kernel.
2841                  */
2842                 label->d_secsize = 2048;
2843
2844                 label->d_secperunit = 0;
2845
2846                 /*
2847                  * XXX KDM is this a good idea?  Seems to cause more
2848                  * problems.
2849                  */
2850                 if (softc->flags & CD_FLAG_OPEN) {
2851                         int force;
2852
2853                         force = 1;
2854
2855                         /*
2856                          * We don't bother checking the return value here,
2857                          * since we already have an error...
2858                          */
2859                         dsioctl(softc->disk.d_dev, DIOCSYNCSLICEINFO,
2860                                 /*data*/(caddr_t)&force, /*flags*/ 0,
2861                                 &softc->disk.d_slice);
2862                 }
2863
2864                 /*
2865                  * Tell devstat(9) we don't have a blocksize.
2866                  */
2867                 softc->device_stats.flags |= DEVSTAT_BS_UNAVAILABLE;
2868
2869                 cdprevent(periph, PR_ALLOW);
2870
2871                 return (error);
2872         } else {
2873
2874                 label->d_secsize = softc->params.blksize;
2875                 label->d_secperunit = softc->params.disksize;
2876
2877                 /*
2878                  * Force a re-sync of slice information, like the blocksize,
2879                  * now that we know it.  It isn't pretty...but according to
2880                  * Bruce Evans, this is probably the best way to do it in
2881                  * -stable.  We only do this if we're already open, and
2882                  * therefore dsopen() has already run.  If CD_FLAG_OPEN
2883                  * isn't set, this isn't necessary.
2884                  */
2885                 if (softc->flags & CD_FLAG_OPEN) {
2886                         int force;
2887
2888                         force = 1;
2889
2890                         error = dsioctl(softc->disk.d_dev, DIOCSYNCSLICEINFO,
2891                                         /*data*/(caddr_t)&force, /*flags*/ 0,
2892                                         &softc->disk.d_slice);
2893                         if (error != 0) {
2894                                 /*
2895                                  * Set a bogus sector size, so the slice code
2896                                  * won't try to divide by 0 and panic the
2897                                  * kernel.
2898                                  */
2899                                 label->d_secsize = 2048;
2900
2901                                 label->d_secperunit = 0;
2902
2903                                 /*
2904                                  * Tell devstat(9) we don't have a blocksize.
2905                                  */
2906                                 softc->device_stats.flags |=
2907                                         DEVSTAT_BS_UNAVAILABLE;
2908
2909                                 cdprevent(periph, PR_ALLOW);
2910                         }
2911                 }
2912
2913                 /*
2914                  * We unconditionally (re)set the blocksize each time the
2915                  * CD device is opened.  This is because the CD can change,
2916                  * and therefore the blocksize might change.
2917                  * XXX problems here if some slice or partition is still
2918                  * open with the old size?
2919                  */
2920                 if ((softc->device_stats.flags & DEVSTAT_BS_UNAVAILABLE) != 0)
2921                         softc->device_stats.flags &= ~DEVSTAT_BS_UNAVAILABLE;
2922                 softc->device_stats.block_size = softc->params.blksize;
2923
2924                 softc->flags |= CD_FLAG_VALID_MEDIA;
2925         }
2926
2927         /*
2928          * Now we check the table of contents.  This (currently) is only
2929          * used for the CDIOCPLAYTRACKS ioctl.  It may be used later to do
2930          * things like present a separate entry in /dev for each track,
2931          * like that acd(4) driver does.
2932          */
2933         bzero(&softc->toc, sizeof(softc->toc));
2934         toch = &softc->toc.header;
2935
2936         /*
2937          * We will get errors here for media that doesn't have a table of
2938          * contents.  According to the MMC-3 spec: "When a Read TOC/PMA/ATIP
2939          * command is presented for a DDCD/CD-R/RW media, where the first TOC
2940          * has not been recorded (no complete session) and the Format codes
2941          * 0000b, 0001b, or 0010b are specified, this command shall be rejected
2942          * with an INVALID FIELD IN CDB.  Devices that are not capable of
2943          * reading an incomplete session on DDC/CD-R/RW media shall report
2944          * CANNOT READ MEDIUM - INCOMPATIBLE FORMAT."
2945          *
2946          * So this isn't fatal if we can't read the table of contents, it
2947          * just means that the user won't be able to issue the play tracks
2948          * ioctl, and likely lots of other stuff won't work either.  They
2949          * need to burn the CD before we can do a whole lot with it.  So
2950          * we don't print anything here if we get an error back.
2951          */
2952         error = cdreadtoc(periph, 0, 0, (u_int8_t *)toch, sizeof(*toch),
2953                           SF_NO_PRINT);
2954         /*
2955          * Errors in reading the table of contents aren't fatal, we just
2956          * won't have a valid table of contents cached.
2957          */
2958         if (error != 0) {
2959                 error = 0;
2960                 bzero(&softc->toc, sizeof(softc->toc));
2961                 goto bailout;
2962         }
2963
2964         if (softc->quirks & CD_Q_BCD_TRACKS) {
2965                 toch->starting_track = bcd2bin(toch->starting_track);
2966                 toch->ending_track = bcd2bin(toch->ending_track);
2967         }
2968
2969         /* Number of TOC entries, plus leadout */
2970         num_entries = (toch->ending_track - toch->starting_track) + 2;
2971
2972         if (num_entries <= 0)
2973                 goto bailout;
2974
2975         toclen = num_entries * sizeof(struct cd_toc_entry);
2976
2977         error = cdreadtoc(periph, CD_MSF_FORMAT, toch->starting_track,
2978                           (u_int8_t *)&softc->toc, toclen + sizeof(*toch),
2979                           SF_NO_PRINT);
2980         if (error != 0) {
2981                 error = 0;
2982                 bzero(&softc->toc, sizeof(softc->toc));
2983                 goto bailout;
2984         }
2985
2986         if (softc->quirks & CD_Q_BCD_TRACKS) {
2987                 toch->starting_track = bcd2bin(toch->starting_track);
2988                 toch->ending_track = bcd2bin(toch->ending_track);
2989         }
2990         toch->len = scsi_2btoul((uint8_t *)&toch->len);
2991
2992         /*
2993          * XXX KDM is this necessary?  Probably only if the drive doesn't
2994          * return leadout information with the table of contents.
2995          */
2996         cdindex = toch->starting_track + num_entries -1;
2997         if (cdindex == toch->ending_track + 1) {
2998
2999                 error = cdreadtoc(periph, CD_MSF_FORMAT, LEADOUT, 
3000                                   (u_int8_t *)&leadout, sizeof(leadout),
3001                                   SF_NO_PRINT);
3002                 if (error != 0) {
3003                         error = 0;
3004                         goto bailout;
3005                 }
3006                 softc->toc.entries[cdindex - toch->starting_track] =
3007                         leadout.entry;
3008         }
3009         if (softc->quirks & CD_Q_BCD_TRACKS) {
3010                 for (cdindex = 0; cdindex < (num_entries - 1); cdindex++) {
3011                         softc->toc.entries[cdindex].track =
3012                                 bcd2bin(softc->toc.entries[cdindex].track);
3013                 }
3014         }
3015
3016         /*
3017          * Run through the TOC entries, find the first entry and determine
3018          * whether it is an audio or data track.
3019          */
3020         for (cdindex = 0; cdindex < (num_entries - 1); cdindex++) {
3021                 if (softc->toc.entries[cdindex].track == toch->starting_track) {
3022                         if (softc->toc.entries[cdindex].control & 0x04)
3023                                 first_track_audio = 0;
3024                         else
3025                                 first_track_audio = 1;
3026                         break;
3027                 }
3028         }
3029
3030         /*
3031          * If first_track_audio is non-zero, we either have an error (e.g.
3032          * couldn't find the starting track) or the first track is an audio
3033          * track.  If first_track_audio is 0, the first track is a data
3034          * track that could have a disklabel.  Attempt to read the
3035          * disklabel off the media, just in case the user put one there.
3036          */
3037         if (first_track_audio == 0) {
3038                 softc->disk.d_dsflags |= DSO_COMPATLABEL;
3039                 softc->disk.d_dsflags &= ~DSO_NOLABELS;
3040         }
3041         softc->flags |= CD_FLAG_VALID_TOC;
3042
3043 bailout:
3044         return (error);
3045 }
3046
3047 static int
3048 cdsize(struct cam_periph *periph, u_int32_t *size)
3049 {
3050         struct cd_softc *softc;
3051         union ccb *ccb;
3052         struct scsi_read_capacity_data *rcap_buf;
3053         int error;
3054
3055         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdsize\n"));
3056
3057         softc = (struct cd_softc *)periph->softc;
3058              
3059         ccb = cdgetccb(periph, /* priority */ 1);
3060
3061         rcap_buf = malloc(sizeof(struct scsi_read_capacity_data), 
3062                           M_TEMP, M_INTWAIT | M_ZERO);
3063
3064         scsi_read_capacity(&ccb->csio, 
3065                            /*retries*/ 1,
3066                            cddone,
3067                            MSG_SIMPLE_Q_TAG,
3068                            rcap_buf,
3069                            SSD_FULL_SIZE,
3070                            /* timeout */20000);
3071
3072         error = cdrunccb(ccb, cderror, /*cam_flags*/0,
3073                          /*sense_flags*/SF_RETRY_UA|SF_NO_PRINT|SF_RETRY_SELTO);
3074
3075         xpt_release_ccb(ccb);
3076
3077         softc->params.disksize = scsi_4btoul(rcap_buf->addr) + 1;
3078         softc->params.blksize  = scsi_4btoul(rcap_buf->length);
3079         /*
3080          * SCSI-3 mandates that the reported blocksize shall be 2048.
3081          * Older drives sometimes report funny values, trim it down to
3082          * 2048, or other parts of the kernel will get confused.
3083          *
3084          * XXX we leave drives alone that might report 512 bytes, as
3085          * well as drives reporting more weird sizes like perhaps 4K.
3086          */
3087         if (softc->params.blksize > 2048 && softc->params.blksize <= 2352)
3088                 softc->params.blksize = 2048;
3089
3090         free(rcap_buf, M_TEMP);
3091         *size = softc->params.disksize;
3092
3093         return (error);
3094
3095 }
3096
3097 static int
3098 cd6byteworkaround(union ccb *ccb)
3099 {
3100         u_int8_t *cdb;
3101         struct cam_periph *periph;
3102         struct cd_softc *softc;
3103         struct cd_mode_params *params;
3104         int frozen, found;
3105
3106         periph = xpt_path_periph(ccb->ccb_h.path);
3107         softc = (struct cd_softc *)periph->softc;
3108
3109         cdb = ccb->csio.cdb_io.cdb_bytes;
3110
3111         if ((ccb->ccb_h.flags & CAM_CDB_POINTER)
3112          || ((cdb[0] != MODE_SENSE_6)
3113           && (cdb[0] != MODE_SELECT_6)))
3114                 return (0);
3115
3116         /*
3117          * Because there is no convenient place to stash the overall
3118          * cd_mode_params structure pointer, we have to grab it like this.
3119          * This means that ALL MODE_SENSE and MODE_SELECT requests in the
3120          * cd(4) driver MUST go through cdgetmode() and cdsetmode()!
3121          *
3122          * XXX It would be nice if, at some point, we could increase the
3123          * number of available peripheral private pointers.  Both pointers
3124          * are currently used in most every peripheral driver.
3125          */
3126         found = 0;
3127
3128         STAILQ_FOREACH(params, &softc->mode_queue, links) {
3129                 if (params->mode_buf == ccb->csio.data_ptr) {
3130                         found = 1;
3131                         break;
3132                 }
3133         }
3134
3135         /*
3136          * This shouldn't happen.  All mode sense and mode select
3137          * operations in the cd(4) driver MUST go through cdgetmode() and
3138          * cdsetmode()!
3139          */
3140         if (found == 0) {
3141                 xpt_print_path(periph->path);
3142                 printf("mode buffer not found in mode queue!\n");
3143                 return (0);
3144         }
3145
3146         params->cdb_size = 10;
3147         softc->minimum_command_size = 10;
3148         xpt_print_path(ccb->ccb_h.path);
3149         printf("%s(6) failed, increasing minimum CDB size to 10 bytes\n",
3150                (cdb[0] == MODE_SENSE_6) ? "MODE_SENSE" : "MODE_SELECT");
3151
3152         if (cdb[0] == MODE_SENSE_6) {
3153                 struct scsi_mode_sense_10 ms10;
3154                 struct scsi_mode_sense_6 *ms6;
3155                 int len;
3156
3157                 ms6 = (struct scsi_mode_sense_6 *)cdb;
3158
3159                 bzero(&ms10, sizeof(ms10));
3160                 ms10.opcode = MODE_SENSE_10;
3161                 ms10.byte2 = ms6->byte2;
3162                 ms10.page = ms6->page;
3163
3164                 /*
3165                  * 10 byte mode header, block descriptor,
3166                  * sizeof(union cd_pages)
3167                  */
3168                 len = sizeof(struct cd_mode_data_10);
3169                 ccb->csio.dxfer_len = len;
3170
3171                 scsi_ulto2b(len, ms10.length);
3172                 ms10.control = ms6->control;
3173                 bcopy(&ms10, cdb, 10);
3174                 ccb->csio.cdb_len = 10;
3175         } else {
3176                 struct scsi_mode_select_10 ms10;
3177                 struct scsi_mode_select_6 *ms6;
3178                 struct scsi_mode_header_6 *header6;
3179                 struct scsi_mode_header_10 *header10;
3180                 struct scsi_mode_page_header *page_header;
3181                 int blk_desc_len, page_num, page_size, len;
3182
3183                 ms6 = (struct scsi_mode_select_6 *)cdb;
3184
3185                 bzero(&ms10, sizeof(ms10));
3186                 ms10.opcode = MODE_SELECT_10;
3187                 ms10.byte2 = ms6->byte2;
3188
3189                 header6 = (struct scsi_mode_header_6 *)params->mode_buf;
3190                 header10 = (struct scsi_mode_header_10 *)params->mode_buf;
3191
3192                 page_header = find_mode_page_6(header6);
3193                 page_num = page_header->page_code;
3194
3195                 blk_desc_len = header6->blk_desc_len;
3196
3197                 page_size = cdgetpagesize(page_num);
3198
3199                 if (page_size != (page_header->page_length +
3200                     sizeof(*page_header)))
3201                         page_size = page_header->page_length +
3202                                 sizeof(*page_header);
3203
3204                 len = sizeof(*header10) + blk_desc_len + page_size;
3205
3206                 len = min(params->alloc_len, len);
3207
3208                 /*
3209                  * Since the 6 byte parameter header is shorter than the 10
3210                  * byte parameter header, we need to copy the actual mode
3211                  * page data, and the block descriptor, if any, so things wind
3212                  * up in the right place.  The regions will overlap, but
3213                  * bcopy() does the right thing.
3214                  */
3215                 bcopy(params->mode_buf + sizeof(*header6),
3216                       params->mode_buf + sizeof(*header10),
3217                       len - sizeof(*header10));
3218
3219                 /* Make sure these fields are set correctly. */
3220                 scsi_ulto2b(0, header10->data_length);
3221                 header10->medium_type = 0;
3222                 scsi_ulto2b(blk_desc_len, header10->blk_desc_len);
3223
3224                 ccb->csio.dxfer_len = len;
3225
3226                 scsi_ulto2b(len, ms10.length);
3227                 ms10.control = ms6->control;
3228                 bcopy(&ms10, cdb, 10);
3229                 ccb->csio.cdb_len = 10;
3230         }
3231
3232         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
3233         ccb->ccb_h.status = CAM_REQUEUE_REQ;
3234         xpt_action(ccb);
3235         if (frozen) {
3236                 cam_release_devq(ccb->ccb_h.path,
3237                                  /*relsim_flags*/0,
3238                                  /*openings*/0,
3239                                  /*timeout*/0,
3240                                  /*getcount_only*/0);
3241         }
3242
3243         return (ERESTART);
3244 }
3245
3246 static int
3247 cderror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
3248 {
3249         struct cd_softc *softc;
3250         struct cam_periph *periph;
3251         int error;
3252
3253         periph = xpt_path_periph(ccb->ccb_h.path);
3254         softc = (struct cd_softc *)periph->softc;
3255
3256         error = 0;
3257
3258         /*
3259          * We use a status of CAM_REQ_INVALID as shorthand -- if a 6 byte
3260          * CDB comes back with this particular error, try transforming it
3261          * into the 10 byte version.
3262          */
3263         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
3264                 error = cd6byteworkaround(ccb);
3265         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
3266                      CAM_SCSI_STATUS_ERROR)
3267          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
3268          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
3269          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
3270          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
3271                 int sense_key, error_code, asc, ascq;
3272
3273                 scsi_extract_sense(&ccb->csio.sense_data,
3274                                    &error_code, &sense_key, &asc, &ascq);
3275                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
3276                         error = cd6byteworkaround(ccb);
3277         }
3278
3279         if (error == ERESTART)
3280                 return (error);
3281
3282         /*
3283          * XXX
3284          * Until we have a better way of doing pack validation,
3285          * don't treat UAs as errors.
3286          */
3287         sense_flags |= SF_RETRY_UA;
3288         return (cam_periph_error(ccb, cam_flags, sense_flags, 
3289                                  &softc->saved_ccb));
3290 }
3291
3292 /*
3293  * Read table of contents
3294  */
3295 static int 
3296 cdreadtoc(struct cam_periph *periph, u_int32_t mode, u_int32_t start, 
3297           u_int8_t *data, u_int32_t len, u_int32_t sense_flags)
3298 {
3299         struct scsi_read_toc *scsi_cmd;
3300         u_int32_t ntoc;
3301         struct ccb_scsiio *csio;
3302         union ccb *ccb;
3303         int error;
3304
3305         ntoc = len;
3306         error = 0;
3307
3308         ccb = cdgetccb(periph, /* priority */ 1);
3309
3310         csio = &ccb->csio;
3311
3312         cam_fill_csio(csio, 
3313                       /* retries */ 1, 
3314                       /* cbfcnp */ cddone, 
3315                       /* flags */ CAM_DIR_IN,
3316                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3317                       /* data_ptr */ data,
3318                       /* dxfer_len */ len,
3319                       /* sense_len */ SSD_FULL_SIZE,
3320                       sizeof(struct scsi_read_toc),
3321                       /* timeout */ 50000);
3322
3323         scsi_cmd = (struct scsi_read_toc *)&csio->cdb_io.cdb_bytes;
3324         bzero (scsi_cmd, sizeof(*scsi_cmd));
3325
3326         if (mode == CD_MSF_FORMAT)
3327                 scsi_cmd->byte2 |= CD_MSF;
3328         scsi_cmd->from_track = start;
3329         /* scsi_ulto2b(ntoc, (u_int8_t *)scsi_cmd->data_len); */
3330         scsi_cmd->data_len[0] = (ntoc) >> 8;
3331         scsi_cmd->data_len[1] = (ntoc) & 0xff;
3332
3333         scsi_cmd->op_code = READ_TOC;
3334
3335         error = cdrunccb(ccb, cderror, /*cam_flags*/0,
3336                          /*sense_flags*/SF_RETRY_UA | SF_RETRY_SELTO |
3337                          sense_flags);
3338
3339         xpt_release_ccb(ccb);
3340
3341         return(error);
3342 }
3343
3344 static int
3345 cdreadsubchannel(struct cam_periph *periph, u_int32_t mode, 
3346                  u_int32_t format, int track, 
3347                  struct cd_sub_channel_info *data, u_int32_t len) 
3348 {
3349         struct scsi_read_subchannel *scsi_cmd;
3350         struct ccb_scsiio *csio;
3351         union ccb *ccb;
3352         int error;
3353
3354         error = 0;
3355
3356         ccb = cdgetccb(periph, /* priority */ 1);
3357
3358         csio = &ccb->csio;
3359
3360         cam_fill_csio(csio, 
3361                       /* retries */ 1, 
3362                       /* cbfcnp */ cddone, 
3363                       /* flags */ CAM_DIR_IN,
3364                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3365                       /* data_ptr */ (u_int8_t *)data,
3366                       /* dxfer_len */ len,
3367                       /* sense_len */ SSD_FULL_SIZE,
3368                       sizeof(struct scsi_read_subchannel),
3369                       /* timeout */ 50000);
3370
3371         scsi_cmd = (struct scsi_read_subchannel *)&csio->cdb_io.cdb_bytes;
3372         bzero (scsi_cmd, sizeof(*scsi_cmd));
3373
3374         scsi_cmd->op_code = READ_SUBCHANNEL;
3375         if (mode == CD_MSF_FORMAT)
3376                 scsi_cmd->byte1 |= CD_MSF;
3377         scsi_cmd->byte2 = SRS_SUBQ;
3378         scsi_cmd->subchan_format = format;
3379         scsi_cmd->track = track;
3380         scsi_ulto2b(len, (u_int8_t *)scsi_cmd->data_len);
3381         scsi_cmd->control = 0;
3382
3383         error = cdrunccb(ccb, cderror, /*cam_flags*/0,
3384                          /*sense_flags*/SF_RETRY_UA|SF_RETRY_SELTO);
3385
3386         xpt_release_ccb(ccb);
3387
3388         return(error);
3389 }
3390
3391 /*
3392  * All MODE_SENSE requests in the cd(4) driver MUST go through this
3393  * routine.  See comments in cd6byteworkaround() for details.
3394  */
3395 static int
3396 cdgetmode(struct cam_periph *periph, struct cd_mode_params *data,
3397           u_int32_t page)
3398 {
3399         struct ccb_scsiio *csio;
3400         struct cd_softc *softc;
3401         union ccb *ccb;
3402         int param_len;
3403         int error;
3404
3405         softc = (struct cd_softc *)periph->softc;
3406
3407         ccb = cdgetccb(periph, /* priority */ 1);
3408
3409         csio = &ccb->csio;
3410
3411         data->cdb_size = softc->minimum_command_size;
3412         if (data->cdb_size < 10)
3413                 param_len = sizeof(struct cd_mode_data);
3414         else
3415                 param_len = sizeof(struct cd_mode_data_10);
3416
3417         /* Don't say we've got more room than we actually allocated */
3418         param_len = min(param_len, data->alloc_len);
3419
3420         scsi_mode_sense_len(csio,
3421                             /* retries */ 1,
3422                             /* cbfcnp */ cddone,
3423                             /* tag_action */ MSG_SIMPLE_Q_TAG,
3424                             /* dbd */ 0,
3425                             /* page_code */ SMS_PAGE_CTRL_CURRENT,
3426                             /* page */ page,
3427                             /* param_buf */ data->mode_buf,
3428                             /* param_len */ param_len,
3429                             /* minimum_cmd_size */ softc->minimum_command_size,
3430                             /* sense_len */ SSD_FULL_SIZE,
3431                             /* timeout */ 50000);
3432
3433         /*
3434          * It would be nice not to have to do this, but there's no
3435          * available pointer in the CCB that would allow us to stuff the
3436          * mode params structure in there and retrieve it in
3437          * cd6byteworkaround(), so we can set the cdb size.  The cdb size
3438          * lets the caller know what CDB size we ended up using, so they
3439          * can find the actual mode page offset.
3440          */
3441         STAILQ_INSERT_TAIL(&softc->mode_queue, data, links);
3442
3443         error = cdrunccb(ccb, cderror, /*cam_flags*/0,
3444                          /*sense_flags*/SF_RETRY_UA|SF_RETRY_SELTO);
3445
3446         xpt_release_ccb(ccb);
3447
3448         STAILQ_REMOVE(&softc->mode_queue, data, cd_mode_params, links);
3449
3450         /*
3451          * This is a bit of belt-and-suspenders checking, but if we run
3452          * into a situation where the target sends back multiple block
3453          * descriptors, we might not have enough space in the buffer to
3454          * see the whole mode page.  Better to return an error than
3455          * potentially access memory beyond our malloced region.
3456          */
3457         if (error == 0) {
3458                 u_int32_t data_len;
3459
3460                 if (data->cdb_size == 10) {
3461                         struct scsi_mode_header_10 *hdr10;
3462
3463                         hdr10 = (struct scsi_mode_header_10 *)data->mode_buf;
3464                         data_len = scsi_2btoul(hdr10->data_length);
3465                         data_len += sizeof(hdr10->data_length);
3466                 } else {
3467                         struct scsi_mode_header_6 *hdr6;
3468
3469                         hdr6 = (struct scsi_mode_header_6 *)data->mode_buf;
3470                         data_len = hdr6->data_length;
3471                         data_len += sizeof(hdr6->data_length);
3472                 }
3473
3474                 /*
3475                  * Complain if there is more mode data available than we
3476                  * allocated space for.  This could potentially happen if
3477                  * we miscalculated the page length for some reason, if the
3478                  * drive returns multiple block descriptors, or if it sets
3479                  * the data length incorrectly.
3480                  */
3481                 if (data_len > data->alloc_len) {
3482                         xpt_print_path(periph->path);
3483                         printf("allocated modepage %d length %d < returned "
3484                                "length %d\n", page, data->alloc_len, data_len);
3485
3486                         error = ENOSPC;
3487                 }
3488         }
3489         return (error);
3490 }
3491
3492 /*
3493  * All MODE_SELECT requests in the cd(4) driver MUST go through this
3494  * routine.  See comments in cd6byteworkaround() for details.
3495  */
3496 static int
3497 cdsetmode(struct cam_periph *periph, struct cd_mode_params *data)
3498 {
3499         struct ccb_scsiio *csio;
3500         struct cd_softc *softc;
3501         union ccb *ccb;
3502         int cdb_size, param_len;
3503         int error;
3504
3505         softc = (struct cd_softc *)periph->softc;
3506
3507         ccb = cdgetccb(periph, /* priority */ 1);
3508
3509         csio = &ccb->csio;
3510
3511         error = 0;
3512
3513         /*
3514          * If the data is formatted for the 10 byte version of the mode
3515          * select parameter list, we need to use the 10 byte CDB.
3516          * Otherwise, we use whatever the stored minimum command size.
3517          */
3518         if (data->cdb_size == 10)
3519                 cdb_size = data->cdb_size;
3520         else
3521                 cdb_size = softc->minimum_command_size;
3522
3523         if (cdb_size >= 10) {
3524                 struct scsi_mode_header_10 *mode_header;
3525                 u_int32_t data_len;
3526
3527                 mode_header = (struct scsi_mode_header_10 *)data->mode_buf;
3528
3529                 data_len = scsi_2btoul(mode_header->data_length);
3530
3531                 scsi_ulto2b(0, mode_header->data_length);
3532                 /*
3533                  * SONY drives do not allow a mode select with a medium_type
3534                  * value that has just been returned by a mode sense; use a
3535                  * medium_type of 0 (Default) instead.
3536                  */
3537                 mode_header->medium_type = 0;
3538
3539                 /*
3540                  * Pass back whatever the drive passed to us, plus the size
3541                  * of the data length field.
3542                  */
3543                 param_len = data_len + sizeof(mode_header->data_length);
3544
3545         } else {
3546                 struct scsi_mode_header_6 *mode_header;
3547
3548                 mode_header = (struct scsi_mode_header_6 *)data->mode_buf;
3549
3550                 param_len = mode_header->data_length + 1;
3551
3552                 mode_header->data_length = 0;
3553                 /*
3554                  * SONY drives do not allow a mode select with a medium_type
3555                  * value that has just been returned by a mode sense; use a
3556                  * medium_type of 0 (Default) instead.
3557                  */
3558                 mode_header->medium_type = 0;
3559         }
3560
3561         /* Don't say we've got more room than we actually allocated */
3562         param_len = min(param_len, data->alloc_len);
3563
3564         scsi_mode_select_len(csio,
3565                              /* retries */ 1,
3566                              /* cbfcnp */ cddone,
3567                              /* tag_action */ MSG_SIMPLE_Q_TAG,
3568                              /* scsi_page_fmt */ 1,
3569                              /* save_pages */ 0,
3570                              /* param_buf */ data->mode_buf,
3571                              /* param_len */ param_len,
3572                              /* minimum_cmd_size */ cdb_size,
3573                              /* sense_len */ SSD_FULL_SIZE,
3574                              /* timeout */ 50000);
3575
3576         /* See comments in cdgetmode() and cd6byteworkaround(). */
3577         STAILQ_INSERT_TAIL(&softc->mode_queue, data, links);
3578
3579         error = cdrunccb(ccb, cderror, /*cam_flags*/0,
3580                &n