Device layer rollup commit.
[dragonfly.git] / sys / bus / cam / cam_xpt.c
1 /*
2  * Implementation of the Common Access Method Transport (XPT) layer.
3  *
4  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions, and the following disclaimer,
13  *    without modification, immediately at the beginning of the file.
14  * 2. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $
30  * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.15 2004/05/19 22:52:37 dillon Exp $
31  */
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/types.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
37 #include <sys/time.h>
38 #include <sys/conf.h>
39 #include <sys/fcntl.h>
40 #include <sys/md5.h>
41 #include <sys/devicestat.h>
42 #include <sys/interrupt.h>
43 #include <sys/bus.h>
44 #include <sys/thread.h>
45 #include <sys/thread2.h>
46
47 #ifdef PC98
48 #include <pc98/pc98/pc98_machdep.h>     /* geometry translation */
49 #endif
50
51 #include <machine/clock.h>
52 #include <machine/ipl.h>
53
54 #include "cam.h"
55 #include "cam_ccb.h"
56 #include "cam_periph.h"
57 #include "cam_sim.h"
58 #include "cam_xpt.h"
59 #include "cam_xpt_sim.h"
60 #include "cam_xpt_periph.h"
61 #include "cam_debug.h"
62
63 #include "scsi/scsi_all.h"
64 #include "scsi/scsi_message.h"
65 #include "scsi/scsi_pass.h"
66 #include "opt_cam.h"
67
68 /* Datastructures internal to the xpt layer */
69
70 /*
71  * Definition of an async handler callback block.  These are used to add
72  * SIMs and peripherals to the async callback lists.
73  */
74 struct async_node {
75         SLIST_ENTRY(async_node) links;
76         u_int32_t       event_enable;   /* Async Event enables */
77         void            (*callback)(void *arg, u_int32_t code,
78                                     struct cam_path *path, void *args);
79         void            *callback_arg;
80 };
81
82 SLIST_HEAD(async_list, async_node);
83 SLIST_HEAD(periph_list, cam_periph);
84 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
85
86 /*
87  * This is the maximum number of high powered commands (e.g. start unit)
88  * that can be outstanding at a particular time.
89  */
90 #ifndef CAM_MAX_HIGHPOWER
91 #define CAM_MAX_HIGHPOWER  4
92 #endif
93
94 /* number of high powered commands that can go through right now */
95 static int num_highpower = CAM_MAX_HIGHPOWER;
96
97 /*
98  * Structure for queueing a device in a run queue.
99  * There is one run queue for allocating new ccbs,
100  * and another for sending ccbs to the controller.
101  */
102 struct cam_ed_qinfo {
103         cam_pinfo pinfo;
104         struct    cam_ed *device;
105 };
106
107 /*
108  * The CAM EDT (Existing Device Table) contains the device information for
109  * all devices for all busses in the system.  The table contains a
110  * cam_ed structure for each device on the bus.
111  */
112 struct cam_ed {
113         TAILQ_ENTRY(cam_ed) links;
114         struct  cam_ed_qinfo alloc_ccb_entry;
115         struct  cam_ed_qinfo send_ccb_entry;
116         struct  cam_et   *target;
117         lun_id_t         lun_id;
118         struct  camq drvq;              /*
119                                          * Queue of type drivers wanting to do
120                                          * work on this device.
121                                          */
122         struct  cam_ccbq ccbq;          /* Queue of pending ccbs */
123         struct  async_list asyncs;      /* Async callback info for this B/T/L */
124         struct  periph_list periphs;    /* All attached devices */
125         u_int   generation;             /* Generation number */
126         struct  cam_periph *owner;      /* Peripheral driver's ownership tag */
127         struct  xpt_quirk_entry *quirk; /* Oddities about this device */
128                                         /* Storage for the inquiry data */
129         struct  scsi_inquiry_data inq_data;
130         u_int8_t         inq_flags;     /*
131                                          * Current settings for inquiry flags.
132                                          * This allows us to override settings
133                                          * like disconnection and tagged
134                                          * queuing for a device.
135                                          */
136         u_int8_t         queue_flags;   /* Queue flags from the control page */
137         u_int8_t         serial_num_len;
138         u_int8_t         *serial_num;
139         u_int32_t        qfrozen_cnt;
140         u_int32_t        flags;
141 #define CAM_DEV_UNCONFIGURED            0x01
142 #define CAM_DEV_REL_TIMEOUT_PENDING     0x02
143 #define CAM_DEV_REL_ON_COMPLETE         0x04
144 #define CAM_DEV_REL_ON_QUEUE_EMPTY      0x08
145 #define CAM_DEV_RESIZE_QUEUE_NEEDED     0x10
146 #define CAM_DEV_TAG_AFTER_COUNT         0x20
147 #define CAM_DEV_INQUIRY_DATA_VALID      0x40
148         u_int32_t        tag_delay_count;
149 #define CAM_TAG_DELAY_COUNT             5
150         u_int32_t        refcount;
151         struct           callout_handle c_handle;
152 };
153
154 /*
155  * Each target is represented by an ET (Existing Target).  These
156  * entries are created when a target is successfully probed with an
157  * identify, and removed when a device fails to respond after a number
158  * of retries, or a bus rescan finds the device missing.
159  */
160 struct cam_et { 
161         TAILQ_HEAD(, cam_ed) ed_entries;
162         TAILQ_ENTRY(cam_et) links;
163         struct  cam_eb  *bus;   
164         target_id_t     target_id;
165         u_int32_t       refcount;       
166         u_int           generation;
167         struct          timeval last_reset;     /* uptime of last reset */
168 };
169
170 /*
171  * Each bus is represented by an EB (Existing Bus).  These entries
172  * are created by calls to xpt_bus_register and deleted by calls to
173  * xpt_bus_deregister.
174  */
175 struct cam_eb { 
176         TAILQ_HEAD(, cam_et) et_entries;
177         TAILQ_ENTRY(cam_eb)  links;
178         path_id_t            path_id;
179         struct cam_sim       *sim;
180         struct timeval       last_reset;        /* uptime of last reset */
181         u_int32_t            flags;
182 #define CAM_EB_RUNQ_SCHEDULED   0x01
183         u_int32_t            refcount;
184         u_int                generation;
185 };
186
187 struct cam_path {
188         struct cam_periph *periph;
189         struct cam_eb     *bus;
190         struct cam_et     *target;
191         struct cam_ed     *device;
192 };
193
194 struct xpt_quirk_entry {
195         struct scsi_inquiry_pattern inq_pat;
196         u_int8_t quirks;
197 #define CAM_QUIRK_NOLUNS        0x01
198 #define CAM_QUIRK_NOSERIAL      0x02
199 #define CAM_QUIRK_HILUNS        0x04
200         u_int mintags;
201         u_int maxtags;
202 };
203 #define CAM_SCSI2_MAXLUN        8
204
205 typedef enum {
206         XPT_FLAG_OPEN           = 0x01
207 } xpt_flags;
208
209 struct xpt_softc {
210         xpt_flags       flags;
211         u_int32_t       generation;
212 };
213
214 static const char quantum[] = "QUANTUM";
215 static const char sony[] = "SONY";
216 static const char west_digital[] = "WDIGTL";
217 static const char samsung[] = "SAMSUNG";
218 static const char seagate[] = "SEAGATE";
219 static const char microp[] = "MICROP";
220
221 static struct xpt_quirk_entry xpt_quirk_table[] = 
222 {
223         {
224                 /* Reports QUEUE FULL for temporary resource shortages */
225                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
226                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
227         },
228         {
229                 /* Reports QUEUE FULL for temporary resource shortages */
230                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
231                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
232         },
233         {
234                 /* Reports QUEUE FULL for temporary resource shortages */
235                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
236                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
237         },
238         {
239                 /* Broken tagged queuing drive */
240                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
241                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
242         },
243         {
244                 /* Broken tagged queuing drive */
245                 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
246                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
247         },
248         {
249                 /* Broken tagged queuing drive */
250                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
251                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
252         },
253         {
254                 /*
255                  * Unfortunately, the Quantum Atlas III has the same
256                  * problem as the Atlas II drives above.
257                  * Reported by: "Johan Granlund" <johan@granlund.nu>
258                  *
259                  * For future reference, the drive with the problem was:
260                  * QUANTUM QM39100TD-SW N1B0
261                  * 
262                  * It's possible that Quantum will fix the problem in later
263                  * firmware revisions.  If that happens, the quirk entry
264                  * will need to be made specific to the firmware revisions
265                  * with the problem.
266                  * 
267                  */
268                 /* Reports QUEUE FULL for temporary resource shortages */
269                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
270                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
271         },
272         {
273                 /*
274                  * 18 Gig Atlas III, same problem as the 9G version.
275                  * Reported by: Andre Albsmeier
276                  *              <andre.albsmeier@mchp.siemens.de>
277                  *
278                  * For future reference, the drive with the problem was:
279                  * QUANTUM QM318000TD-S N491
280                  */
281                 /* Reports QUEUE FULL for temporary resource shortages */
282                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
283                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
284         },
285         {
286                 /*
287                  * Broken tagged queuing drive
288                  * Reported by: Bret Ford <bford@uop.cs.uop.edu>
289                  *         and: Martin Renters <martin@tdc.on.ca>
290                  */
291                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
292                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
293         },
294                 /*
295                  * The Seagate Medalist Pro drives have very poor write
296                  * performance with anything more than 2 tags.
297                  * 
298                  * Reported by:  Paul van der Zwan <paulz@trantor.xs4all.nl>
299                  * Drive:  <SEAGATE ST36530N 1444>
300                  *
301                  * Reported by:  Jeremy Lea <reg@shale.csir.co.za>
302                  * Drive:  <SEAGATE ST34520W 1281>
303                  *
304                  * No one has actually reported that the 9G version
305                  * (ST39140*) of the Medalist Pro has the same problem, but
306                  * we're assuming that it does because the 4G and 6.5G
307                  * versions of the drive are broken.
308                  */
309         {
310                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
311                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
312         },
313         {
314                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
315                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
316         },
317         {
318                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
319                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
320         },
321         {
322                 /*
323                  * Slow when tagged queueing is enabled.  Write performance
324                  * steadily drops off with more and more concurrent
325                  * transactions.  Best sequential write performance with
326                  * tagged queueing turned off and write caching turned on.
327                  *
328                  * PR:  kern/10398
329                  * Submitted by:  Hideaki Okada <hokada@isl.melco.co.jp>
330                  * Drive:  DCAS-34330 w/ "S65A" firmware.
331                  *
332                  * The drive with the problem had the "S65A" firmware
333                  * revision, and has also been reported (by Stephen J.
334                  * Roznowski <sjr@home.net>) for a drive with the "S61A"
335                  * firmware revision.
336                  *
337                  * Although no one has reported problems with the 2 gig
338                  * version of the DCAS drive, the assumption is that it
339                  * has the same problems as the 4 gig version.  Therefore
340                  * this quirk entries disables tagged queueing for all
341                  * DCAS drives.
342                  */
343                 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
344                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
345         },
346         {
347                 /* Broken tagged queuing drive */
348                 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
349                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
350         },
351         {
352                 /* Broken tagged queuing drive */ 
353                 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
354                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
355         },
356         {
357                 /*
358                  * Broken tagged queuing drive.
359                  * Submitted by:
360                  * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
361                  * in PR kern/9535
362                  */
363                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
364                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
365         },
366         {
367                 /*
368                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
369                  * 8MB/sec.)
370                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
371                  * Best performance with these drives is achieved with
372                  * tagged queueing turned off, and write caching turned on.
373                  */
374                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
375                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
376         },
377         {
378                 /*
379                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
380                  * 8MB/sec.)
381                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
382                  * Best performance with these drives is achieved with
383                  * tagged queueing turned off, and write caching turned on.
384                  */
385                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
386                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
387         },
388         {
389                 /*
390                  * Doesn't handle queue full condition correctly,
391                  * so we need to limit maxtags to what the device
392                  * can handle instead of determining this automatically.
393                  */
394                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
395                 /*quirks*/0, /*mintags*/2, /*maxtags*/32
396         },
397         {
398                 /* Really only one LUN */
399                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
400                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
401         },
402         {
403                 /* I can't believe we need a quirk for DPT volumes. */
404                 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
405                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS,
406                 /*mintags*/0, /*maxtags*/255
407         },
408         {
409                 /*
410                  * Many Sony CDROM drives don't like multi-LUN probing.
411                  */
412                 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
413                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
414         },
415         {
416                 /*
417                  * This drive doesn't like multiple LUN probing.
418                  * Submitted by:  Parag Patel <parag@cgt.com>
419                  */
420                 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R   CDU9*", "*" },
421                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
422         },
423         {
424                 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
425                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
426         },
427         {
428                 /*
429                  * The 8200 doesn't like multi-lun probing, and probably
430                  * don't like serial number requests either.
431                  */
432                 {
433                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
434                         "EXB-8200*", "*"
435                 },
436                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
437         },
438         {
439                 /*
440                  * Let's try the same as above, but for a drive that says
441                  * it's an IPL-6860 but is actually an EXB 8200.
442                  */
443                 {
444                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
445                         "IPL-6860*", "*"
446                 },
447                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
448         },
449         {
450                 /*
451                  * These Hitachi drives don't like multi-lun probing.
452                  * The PR submitter has a DK319H, but says that the Linux
453                  * kernel has a similar work-around for the DK312 and DK314,
454                  * so all DK31* drives are quirked here.
455                  * PR:            misc/18793
456                  * Submitted by:  Paul Haddad <paul@pth.com>
457                  */
458                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
459                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
460         },
461         {
462                 /*
463                  * This old revision of the TDC3600 is also SCSI-1, and
464                  * hangs upon serial number probing.
465                  */
466                 {
467                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
468                         " TDC 3600", "U07:"
469                 },
470                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
471         },
472         {
473                 /*
474                  * Would repond to all LUNs if asked for.
475                  */
476                 {
477                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
478                         "CP150", "*"
479                 },
480                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
481         },
482         {
483                 /*
484                  * Would repond to all LUNs if asked for.
485                  */
486                 {
487                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
488                         "96X2*", "*"
489                 },
490                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
491         },
492         {
493                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
494                 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
495                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
496         },
497         {
498                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
499                 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
500                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
501         },
502         {
503                 /* TeraSolutions special settings for TRC-22 RAID */
504                 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
505                   /*quirks*/0, /*mintags*/55, /*maxtags*/255
506         },
507         {
508                 /* Veritas Storage Appliance */
509                 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
510                   CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
511         },
512         {
513                 /*
514                  * Would respond to all LUNs.  Device type and removable
515                  * flag are jumper-selectable.
516                  */
517                 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
518                   "Tahiti 1", "*"
519                 },
520                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
521         },
522         {
523                 /* Default tagged queuing parameters for all devices */
524                 {
525                   T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
526                   /*vendor*/"*", /*product*/"*", /*revision*/"*"
527                 },
528                 /*quirks*/0, /*mintags*/2, /*maxtags*/255
529         },
530 };
531
532 static const int xpt_quirk_table_size =
533         sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
534
535 typedef enum {
536         DM_RET_COPY             = 0x01,
537         DM_RET_FLAG_MASK        = 0x0f,
538         DM_RET_NONE             = 0x00,
539         DM_RET_STOP             = 0x10,
540         DM_RET_DESCEND          = 0x20,
541         DM_RET_ERROR            = 0x30,
542         DM_RET_ACTION_MASK      = 0xf0
543 } dev_match_ret;
544
545 typedef enum {
546         XPT_DEPTH_BUS,
547         XPT_DEPTH_TARGET,
548         XPT_DEPTH_DEVICE,
549         XPT_DEPTH_PERIPH
550 } xpt_traverse_depth;
551
552 struct xpt_traverse_config {
553         xpt_traverse_depth      depth;
554         void                    *tr_func;
555         void                    *tr_arg;
556 };
557
558 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
559 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
560 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
561 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
562 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
563
564 /* Transport layer configuration information */
565 static struct xpt_softc xsoftc;
566
567 /* Queues for our software interrupt handler */
568 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
569 static cam_isrq_t cam_bioq;
570 static cam_isrq_t cam_netq;
571
572 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */
573 static SLIST_HEAD(,ccb_hdr) ccb_freeq;
574 static u_int xpt_max_ccbs;      /*
575                                  * Maximum size of ccb pool.  Modified as
576                                  * devices are added/removed or have their
577                                  * opening counts changed.
578                                  */
579 static u_int xpt_ccb_count;     /* Current count of allocated ccbs */
580
581 struct cam_periph *xpt_periph;
582
583 static periph_init_t xpt_periph_init;
584
585 static periph_init_t probe_periph_init;
586
587 static struct periph_driver xpt_driver =
588 {
589         xpt_periph_init, "xpt",
590         TAILQ_HEAD_INITIALIZER(xpt_driver.units)
591 };
592
593 static struct periph_driver probe_driver =
594 {
595         probe_periph_init, "probe",
596         TAILQ_HEAD_INITIALIZER(probe_driver.units)
597 };
598
599 DATA_SET(periphdriver_set, xpt_driver);
600 DATA_SET(periphdriver_set, probe_driver);
601
602 #define XPT_CDEV_MAJOR 104
603
604 static d_open_t xptopen;
605 static d_close_t xptclose;
606 static d_ioctl_t xptioctl;
607
608 static struct cdevsw xpt_cdevsw = {
609         /* name */      "xpt",
610         /* maj */       XPT_CDEV_MAJOR,
611         /* flags */     0,
612         /* port */      NULL,
613         /* clone */     NULL,
614
615         /* open */      xptopen,
616         /* close */     xptclose,
617         /* read */      noread,
618         /* write */     nowrite,
619         /* ioctl */     xptioctl,
620         /* poll */      nopoll,
621         /* mmap */      nommap,
622         /* strategy */  nostrategy,
623         /* dump */      nodump,
624         /* psize */     nopsize
625 };
626
627 static struct intr_config_hook *xpt_config_hook;
628
629 /* Registered busses */
630 static TAILQ_HEAD(,cam_eb) xpt_busses;
631 static u_int bus_generation;
632
633 /* Storage for debugging datastructures */
634 #ifdef  CAMDEBUG
635 struct cam_path *cam_dpath;
636 u_int32_t cam_dflags;
637 u_int32_t cam_debug_delay;
638 #endif
639
640 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
641 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
642 #endif
643
644 /*
645  * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
646  * enabled.  Also, the user must have either none, or all of CAM_DEBUG_BUS,
647  * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
648  */
649 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
650     || defined(CAM_DEBUG_LUN)
651 #ifdef CAMDEBUG
652 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
653     || !defined(CAM_DEBUG_LUN)
654 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
655         and CAM_DEBUG_LUN"
656 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
657 #else /* !CAMDEBUG */
658 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
659 #endif /* CAMDEBUG */
660 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
661
662 /* Our boot-time initialization hook */
663 static void     xpt_init(void *);
664 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL);
665
666 static cam_status       xpt_compile_path(struct cam_path *new_path,
667                                          struct cam_periph *perph,
668                                          path_id_t path_id,
669                                          target_id_t target_id,
670                                          lun_id_t lun_id);
671
672 static void             xpt_release_path(struct cam_path *path);
673
674 static void             xpt_async_bcast(struct async_list *async_head,
675                                         u_int32_t async_code,
676                                         struct cam_path *path,
677                                         void *async_arg);
678 static void             xpt_dev_async(u_int32_t async_code,
679                                       struct cam_eb *bus,
680                                       struct cam_et *target,
681                                       struct cam_ed *device,
682                                       void *async_arg);
683 static path_id_t xptnextfreepathid(void);
684 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
685 static union ccb *xpt_get_ccb(struct cam_ed *device);
686 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
687                                   u_int32_t new_priority);
688 static void      xpt_run_dev_allocq(struct cam_eb *bus);
689 static void      xpt_run_dev_sendq(struct cam_eb *bus);
690 static timeout_t xpt_release_devq_timeout;
691 static timeout_t xpt_release_simq_timeout;
692 static void      xpt_release_bus(struct cam_eb *bus);
693 static void      xpt_release_devq_device(struct cam_ed *dev, u_int count,
694                                          int run_queue);
695 static struct cam_et*
696                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
697 static void      xpt_release_target(struct cam_eb *bus, struct cam_et *target);
698 static struct cam_ed*
699                  xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
700                                   lun_id_t lun_id);
701 static void      xpt_release_device(struct cam_eb *bus, struct cam_et *target,
702                                     struct cam_ed *device);
703 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
704 static struct cam_eb*
705                  xpt_find_bus(path_id_t path_id);
706 static struct cam_et*
707                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
708 static struct cam_ed*
709                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
710 static void      xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
711 static void      xpt_scan_lun(struct cam_periph *periph,
712                               struct cam_path *path, cam_flags flags,
713                               union ccb *ccb);
714 static void      xptscandone(struct cam_periph *periph, union ccb *done_ccb);
715 static xpt_busfunc_t    xptconfigbuscountfunc;
716 static xpt_busfunc_t    xptconfigfunc;
717 static void      xpt_config(void *arg);
718 static xpt_devicefunc_t xptpassannouncefunc;
719 static void      xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
720 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
721 static void      xptpoll(struct cam_sim *sim);
722 static inthand2_t swi_camnet;
723 static inthand2_t swi_cambio;
724 static void      camisr(cam_isrq_t *queue);
725 #if 0
726 static void      xptstart(struct cam_periph *periph, union ccb *work_ccb);
727 static void      xptasync(struct cam_periph *periph,
728                           u_int32_t code, cam_path *path);
729 #endif
730 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
731                                     int num_patterns, struct cam_eb *bus);
732 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
733                                        int num_patterns, struct cam_ed *device);
734 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
735                                        int num_patterns,
736                                        struct cam_periph *periph);
737 static xpt_busfunc_t    xptedtbusfunc;
738 static xpt_targetfunc_t xptedttargetfunc;
739 static xpt_devicefunc_t xptedtdevicefunc;
740 static xpt_periphfunc_t xptedtperiphfunc;
741 static xpt_pdrvfunc_t   xptplistpdrvfunc;
742 static xpt_periphfunc_t xptplistperiphfunc;
743 static int              xptedtmatch(struct ccb_dev_match *cdm);
744 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
745 static int              xptbustraverse(struct cam_eb *start_bus,
746                                        xpt_busfunc_t *tr_func, void *arg);
747 static int              xpttargettraverse(struct cam_eb *bus,
748                                           struct cam_et *start_target,
749                                           xpt_targetfunc_t *tr_func, void *arg);
750 static int              xptdevicetraverse(struct cam_et *target,
751                                           struct cam_ed *start_device,
752                                           xpt_devicefunc_t *tr_func, void *arg);
753 static int              xptperiphtraverse(struct cam_ed *device,
754                                           struct cam_periph *start_periph,
755                                           xpt_periphfunc_t *tr_func, void *arg);
756 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
757                                         xpt_pdrvfunc_t *tr_func, void *arg);
758 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
759                                             struct cam_periph *start_periph,
760                                             xpt_periphfunc_t *tr_func,
761                                             void *arg);
762 static xpt_busfunc_t    xptdefbusfunc;
763 static xpt_targetfunc_t xptdeftargetfunc;
764 static xpt_devicefunc_t xptdefdevicefunc;
765 static xpt_periphfunc_t xptdefperiphfunc;
766 static int              xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
767 #ifdef notusedyet
768 static int              xpt_for_all_targets(xpt_targetfunc_t *tr_func,
769                                             void *arg);
770 #endif
771 static int              xpt_for_all_devices(xpt_devicefunc_t *tr_func,
772                                             void *arg);
773 #ifdef notusedyet
774 static int              xpt_for_all_periphs(xpt_periphfunc_t *tr_func,
775                                             void *arg);
776 #endif
777 static xpt_devicefunc_t xptsetasyncfunc;
778 static xpt_busfunc_t    xptsetasyncbusfunc;
779 static cam_status       xptregister(struct cam_periph *periph,
780                                     void *arg);
781 static cam_status       proberegister(struct cam_periph *periph,
782                                       void *arg);
783 static void      probeschedule(struct cam_periph *probe_periph);
784 static void      probestart(struct cam_periph *periph, union ccb *start_ccb);
785 static void      proberequestdefaultnegotiation(struct cam_periph *periph);
786 static void      probedone(struct cam_periph *periph, union ccb *done_ccb);
787 static void      probecleanup(struct cam_periph *periph);
788 static void      xpt_find_quirk(struct cam_ed *device);
789 static void      xpt_set_transfer_settings(struct ccb_trans_settings *cts,
790                                            struct cam_ed *device,
791                                            int async_update);
792 static void      xpt_toggle_tags(struct cam_path *path);
793 static void      xpt_start_tags(struct cam_path *path);
794 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
795                                             struct cam_ed *dev);
796 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
797                                            struct cam_ed *dev);
798 static __inline int periph_is_queued(struct cam_periph *periph);
799 static __inline int device_is_alloc_queued(struct cam_ed *device);
800 static __inline int device_is_send_queued(struct cam_ed *device);
801 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
802
803 static __inline int
804 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
805 {
806         int retval;
807
808         if (dev->ccbq.devq_openings > 0) {
809                 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
810                         cam_ccbq_resize(&dev->ccbq,
811                                         dev->ccbq.dev_openings
812                                         + dev->ccbq.dev_active);
813                         dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
814                 }
815                 /*
816                  * The priority of a device waiting for CCB resources
817                  * is that of the the highest priority peripheral driver
818                  * enqueued.
819                  */
820                 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
821                                           &dev->alloc_ccb_entry.pinfo,
822                                           CAMQ_GET_HEAD(&dev->drvq)->priority); 
823         } else {
824                 retval = 0;
825         }
826
827         return (retval);
828 }
829
830 static __inline int
831 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
832 {
833         int     retval;
834
835         if (dev->ccbq.dev_openings > 0) {
836                 /*
837                  * The priority of a device waiting for controller
838                  * resources is that of the the highest priority CCB
839                  * enqueued.
840                  */
841                 retval =
842                     xpt_schedule_dev(&bus->sim->devq->send_queue,
843                                      &dev->send_ccb_entry.pinfo,
844                                      CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
845         } else {
846                 retval = 0;
847         }
848         return (retval);
849 }
850
851 static __inline int
852 periph_is_queued(struct cam_periph *periph)
853 {
854         return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
855 }
856
857 static __inline int
858 device_is_alloc_queued(struct cam_ed *device)
859 {
860         return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
861 }
862
863 static __inline int
864 device_is_send_queued(struct cam_ed *device)
865 {
866         return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
867 }
868
869 static __inline int
870 dev_allocq_is_runnable(struct cam_devq *devq)
871 {
872         /*
873          * Have work to do.
874          * Have space to do more work.
875          * Allowed to do work.
876          */
877         return ((devq->alloc_queue.qfrozen_cnt == 0)
878              && (devq->alloc_queue.entries > 0)
879              && (devq->alloc_openings > 0));
880 }
881
882 static void
883 xpt_periph_init()
884 {
885         cdevsw_add(&xpt_cdevsw, 0, 0);
886         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
887 }
888
889 static void
890 probe_periph_init()
891 {
892 }
893
894
895 static void
896 xptdone(struct cam_periph *periph, union ccb *done_ccb)
897 {
898         /* Caller will release the CCB */
899         wakeup(&done_ccb->ccb_h.cbfcnp);
900 }
901
902 static int
903 xptopen(dev_t dev, int flags, int fmt, struct thread *td)
904 {
905         int unit;
906
907         unit = minor(dev) & 0xff;
908
909         /*
910          * Only allow read-write access.
911          */
912         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
913                 return(EPERM);
914
915         /*
916          * We don't allow nonblocking access.
917          */
918         if ((flags & O_NONBLOCK) != 0) {
919                 printf("xpt%d: can't do nonblocking access\n", unit);
920                 return(ENODEV);
921         }
922
923         /*
924          * We only have one transport layer right now.  If someone accesses
925          * us via something other than minor number 1, point out their
926          * mistake.
927          */
928         if (unit != 0) {
929                 printf("xptopen: got invalid xpt unit %d\n", unit);
930                 return(ENXIO);
931         }
932
933         /* Mark ourselves open */
934         xsoftc.flags |= XPT_FLAG_OPEN;
935         
936         return(0);
937 }
938
939 static int
940 xptclose(dev_t dev, int flag, int fmt, struct thread *td)
941 {
942         int unit;
943
944         unit = minor(dev) & 0xff;
945
946         /*
947          * We only have one transport layer right now.  If someone accesses
948          * us via something other than minor number 1, point out their
949          * mistake.
950          */
951         if (unit != 0) {
952                 printf("xptclose: got invalid xpt unit %d\n", unit);
953                 return(ENXIO);
954         }
955
956         /* Mark ourselves closed */
957         xsoftc.flags &= ~XPT_FLAG_OPEN;
958
959         return(0);
960 }
961
962 static int
963 xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
964 {
965         int unit, error;
966
967         error = 0;
968         unit = minor(dev) & 0xff;
969
970         /*
971          * We only have one transport layer right now.  If someone accesses
972          * us via something other than minor number 1, point out their
973          * mistake.
974          */
975         if (unit != 0) {
976                 printf("xptioctl: got invalid xpt unit %d\n", unit);
977                 return(ENXIO);
978         }
979
980         switch(cmd) {
981         /*
982          * For the transport layer CAMIOCOMMAND ioctl, we really only want
983          * to accept CCB types that don't quite make sense to send through a
984          * passthrough driver.
985          */
986         case CAMIOCOMMAND: {
987                 union ccb *ccb;
988                 union ccb *inccb;
989
990                 inccb = (union ccb *)addr;
991
992                 switch(inccb->ccb_h.func_code) {
993                 case XPT_SCAN_BUS:
994                 case XPT_RESET_BUS:
995                         if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
996                          || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
997                                 error = EINVAL;
998                                 break;
999                         }
1000                         /* FALLTHROUGH */
1001                 case XPT_PATH_INQ:
1002                 case XPT_ENG_INQ:
1003                 case XPT_SCAN_LUN:
1004
1005                         ccb = xpt_alloc_ccb();
1006
1007                         /*
1008                          * Create a path using the bus, target, and lun the
1009                          * user passed in.
1010                          */
1011                         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1012                                             inccb->ccb_h.path_id,
1013                                             inccb->ccb_h.target_id,
1014                                             inccb->ccb_h.target_lun) !=
1015                                             CAM_REQ_CMP){
1016                                 error = EINVAL;
1017                                 xpt_free_ccb(ccb);
1018                                 break;
1019                         }
1020                         /* Ensure all of our fields are correct */
1021                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1022                                       inccb->ccb_h.pinfo.priority);
1023                         xpt_merge_ccb(ccb, inccb);
1024                         ccb->ccb_h.cbfcnp = xptdone;
1025                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1026                         bcopy(ccb, inccb, sizeof(union ccb));
1027                         xpt_free_path(ccb->ccb_h.path);
1028                         xpt_free_ccb(ccb);
1029                         break;
1030
1031                 case XPT_DEBUG: {
1032                         union ccb ccb;
1033
1034                         /*
1035                          * This is an immediate CCB, so it's okay to
1036                          * allocate it on the stack.
1037                          */
1038
1039                         /*
1040                          * Create a path using the bus, target, and lun the
1041                          * user passed in.
1042                          */
1043                         if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1044                                             inccb->ccb_h.path_id,
1045                                             inccb->ccb_h.target_id,
1046                                             inccb->ccb_h.target_lun) !=
1047                                             CAM_REQ_CMP){
1048                                 error = EINVAL;
1049                                 break;
1050                         }
1051                         /* Ensure all of our fields are correct */
1052                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1053                                       inccb->ccb_h.pinfo.priority);
1054                         xpt_merge_ccb(&ccb, inccb);
1055                         ccb.ccb_h.cbfcnp = xptdone;
1056                         xpt_action(&ccb);
1057                         bcopy(&ccb, inccb, sizeof(union ccb));
1058                         xpt_free_path(ccb.ccb_h.path);
1059                         break;
1060
1061                 }
1062                 case XPT_DEV_MATCH: {
1063                         struct cam_periph_map_info mapinfo;
1064                         struct cam_path *old_path;
1065
1066                         /*
1067                          * We can't deal with physical addresses for this
1068                          * type of transaction.
1069                          */
1070                         if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1071                                 error = EINVAL;
1072                                 break;
1073                         }
1074
1075                         /*
1076                          * Save this in case the caller had it set to
1077                          * something in particular.
1078                          */
1079                         old_path = inccb->ccb_h.path;
1080
1081                         /*
1082                          * We really don't need a path for the matching
1083                          * code.  The path is needed because of the
1084                          * debugging statements in xpt_action().  They
1085                          * assume that the CCB has a valid path.
1086                          */
1087                         inccb->ccb_h.path = xpt_periph->path;
1088
1089                         bzero(&mapinfo, sizeof(mapinfo));
1090
1091                         /*
1092                          * Map the pattern and match buffers into kernel
1093                          * virtual address space.
1094                          */
1095                         error = cam_periph_mapmem(inccb, &mapinfo);
1096
1097                         if (error) {
1098                                 inccb->ccb_h.path = old_path;
1099                                 break;
1100                         }
1101
1102                         /*
1103                          * This is an immediate CCB, we can send it on directly.
1104                          */
1105                         xpt_action(inccb);
1106
1107                         /*
1108                          * Map the buffers back into user space.
1109                          */
1110                         cam_periph_unmapmem(inccb, &mapinfo);
1111
1112                         inccb->ccb_h.path = old_path;
1113
1114                         error = 0;
1115                         break;
1116                 }
1117                 default:
1118                         error = ENOTSUP;
1119                         break;
1120                 }
1121                 break;
1122         }
1123         /*
1124          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1125          * with the periphal driver name and unit name filled in.  The other
1126          * fields don't really matter as input.  The passthrough driver name
1127          * ("pass"), and unit number are passed back in the ccb.  The current
1128          * device generation number, and the index into the device peripheral
1129          * driver list, and the status are also passed back.  Note that
1130          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1131          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
1132          * (or rather should be) impossible for the device peripheral driver
1133          * list to change since we look at the whole thing in one pass, and
1134          * we do it with splcam protection.
1135          * 
1136          */
1137         case CAMGETPASSTHRU: {
1138                 union ccb *ccb;
1139                 struct cam_periph *periph;
1140                 struct periph_driver **p_drv;
1141                 char   *name;
1142                 int unit;
1143                 int cur_generation;
1144                 int base_periph_found;
1145                 int splbreaknum;
1146                 int s;
1147
1148                 ccb = (union ccb *)addr;
1149                 unit = ccb->cgdl.unit_number;
1150                 name = ccb->cgdl.periph_name;
1151                 /*
1152                  * Every 100 devices, we want to drop our spl protection to
1153                  * give the software interrupt handler a chance to run.
1154                  * Most systems won't run into this check, but this should
1155                  * avoid starvation in the software interrupt handler in
1156                  * large systems.
1157                  */
1158                 splbreaknum = 100;
1159
1160                 ccb = (union ccb *)addr;
1161
1162                 base_periph_found = 0;
1163
1164                 /*
1165                  * Sanity check -- make sure we don't get a null peripheral
1166                  * driver name.
1167                  */
1168                 if (*ccb->cgdl.periph_name == '\0') {
1169                         error = EINVAL;
1170                         break;
1171                 }
1172
1173                 /* Keep the list from changing while we traverse it */
1174                 s = splcam();
1175 ptstartover:
1176                 cur_generation = xsoftc.generation;
1177
1178                 /* first find our driver in the list of drivers */
1179                 SET_FOREACH(p_drv, periphdriver_set) {
1180                         if (strcmp((*p_drv)->driver_name, name) == 0)
1181                                 break;
1182                 }
1183
1184                 if (*p_drv == NULL) {
1185                         splx(s);
1186                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1187                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1188                         *ccb->cgdl.periph_name = '\0';
1189                         ccb->cgdl.unit_number = 0;
1190                         error = ENOENT;
1191                         break;
1192                 }       
1193
1194                 /*
1195                  * Run through every peripheral instance of this driver
1196                  * and check to see whether it matches the unit passed
1197                  * in by the user.  If it does, get out of the loops and
1198                  * find the passthrough driver associated with that
1199                  * peripheral driver.
1200                  */
1201                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1202                      periph = TAILQ_NEXT(periph, unit_links)) {
1203
1204                         if (periph->unit_number == unit) {
1205                                 break;
1206                         } else if (--splbreaknum == 0) {
1207                                 splx(s);
1208                                 s = splcam();
1209                                 splbreaknum = 100;
1210                                 if (cur_generation != xsoftc.generation)
1211                                        goto ptstartover;
1212                         }
1213                 }
1214                 /*
1215                  * If we found the peripheral driver that the user passed
1216                  * in, go through all of the peripheral drivers for that
1217                  * particular device and look for a passthrough driver.
1218                  */
1219                 if (periph != NULL) {
1220                         struct cam_ed *device;
1221                         int i;
1222
1223                         base_periph_found = 1;
1224                         device = periph->path->device;
1225                         for (i = 0, periph = device->periphs.slh_first;
1226                              periph != NULL;
1227                              periph = periph->periph_links.sle_next, i++) {
1228                                 /*
1229                                  * Check to see whether we have a
1230                                  * passthrough device or not. 
1231                                  */
1232                                 if (strcmp(periph->periph_name, "pass") == 0) {
1233                                         /*
1234                                          * Fill in the getdevlist fields.
1235                                          */
1236                                         strcpy(ccb->cgdl.periph_name,
1237                                                periph->periph_name);
1238                                         ccb->cgdl.unit_number =
1239                                                 periph->unit_number;
1240                                         if (periph->periph_links.sle_next)
1241                                                 ccb->cgdl.status =
1242                                                         CAM_GDEVLIST_MORE_DEVS;
1243                                         else
1244                                                 ccb->cgdl.status =
1245                                                        CAM_GDEVLIST_LAST_DEVICE;
1246                                         ccb->cgdl.generation =
1247                                                 device->generation;
1248                                         ccb->cgdl.index = i;
1249                                         /*
1250                                          * Fill in some CCB header fields
1251                                          * that the user may want.
1252                                          */
1253                                         ccb->ccb_h.path_id =
1254                                                 periph->path->bus->path_id;
1255                                         ccb->ccb_h.target_id =
1256                                                 periph->path->target->target_id;
1257                                         ccb->ccb_h.target_lun =
1258                                                 periph->path->device->lun_id;
1259                                         ccb->ccb_h.status = CAM_REQ_CMP;
1260                                         break;
1261                                 }
1262                         }
1263                 }
1264
1265                 /*
1266                  * If the periph is null here, one of two things has
1267                  * happened.  The first possibility is that we couldn't
1268                  * find the unit number of the particular peripheral driver
1269                  * that the user is asking about.  e.g. the user asks for
1270                  * the passthrough driver for "da11".  We find the list of
1271                  * "da" peripherals all right, but there is no unit 11.
1272                  * The other possibility is that we went through the list
1273                  * of peripheral drivers attached to the device structure,
1274                  * but didn't find one with the name "pass".  Either way,
1275                  * we return ENOENT, since we couldn't find something.
1276                  */
1277                 if (periph == NULL) {
1278                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1279                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1280                         *ccb->cgdl.periph_name = '\0';
1281                         ccb->cgdl.unit_number = 0;
1282                         error = ENOENT;
1283                         /*
1284                          * It is unfortunate that this is even necessary,
1285                          * but there are many, many clueless users out there.
1286                          * If this is true, the user is looking for the
1287                          * passthrough driver, but doesn't have one in his
1288                          * kernel.
1289                          */
1290                         if (base_periph_found == 1) {
1291                                 printf("xptioctl: pass driver is not in the "
1292                                        "kernel\n");
1293                                 printf("xptioctl: put \"device pass0\" in "
1294                                        "your kernel config file\n");
1295                         }
1296                 }
1297                 splx(s);
1298                 break;
1299                 }
1300         default:
1301                 error = ENOTTY;
1302                 break;
1303         }
1304
1305         return(error);
1306 }
1307
1308 /* Functions accessed by the peripheral drivers */
1309 static void
1310 xpt_init(dummy)
1311         void *dummy;
1312 {
1313         struct cam_sim *xpt_sim;
1314         struct cam_path *path;
1315         struct cam_devq *devq;
1316         cam_status status;
1317
1318         TAILQ_INIT(&xpt_busses);
1319         TAILQ_INIT(&cam_bioq);
1320         TAILQ_INIT(&cam_netq);
1321         SLIST_INIT(&ccb_freeq);
1322         STAILQ_INIT(&highpowerq);
1323
1324         /*
1325          * The xpt layer is, itself, the equivelent of a SIM.
1326          * Allow 16 ccbs in the ccb pool for it.  This should
1327          * give decent parallelism when we probe busses and
1328          * perform other XPT functions.
1329          */
1330         devq = cam_simq_alloc(16);
1331         xpt_sim = cam_sim_alloc(xptaction,
1332                                 xptpoll,
1333                                 "xpt",
1334                                 /*softc*/NULL,
1335                                 /*unit*/0,
1336                                 /*max_dev_transactions*/0,
1337                                 /*max_tagged_dev_transactions*/0,
1338                                 devq);
1339         cam_simq_release(devq);
1340         xpt_max_ccbs = 16;
1341                                 
1342         xpt_bus_register(xpt_sim, /*bus #*/0);
1343
1344         /*
1345          * Looking at the XPT from the SIM layer, the XPT is
1346          * the equivelent of a peripheral driver.  Allocate
1347          * a peripheral driver entry for us.
1348          */
1349         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1350                                       CAM_TARGET_WILDCARD,
1351                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1352                 printf("xpt_init: xpt_create_path failed with status %#x,"
1353                        " failing attach\n", status);
1354                 return;
1355         }
1356
1357         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1358                          path, NULL, 0, NULL);
1359         xpt_free_path(path);
1360
1361         xpt_sim->softc = xpt_periph;
1362
1363         /*
1364          * Register a callback for when interrupts are enabled.
1365          */
1366         xpt_config_hook = malloc(sizeof(struct intr_config_hook),
1367                                   M_TEMP, M_INTWAIT | M_ZERO);
1368         xpt_config_hook->ich_func = xpt_config;
1369         if (config_intrhook_establish(xpt_config_hook) != 0) {
1370                 free (xpt_config_hook, M_TEMP);
1371                 printf("xpt_init: config_intrhook_establish failed "
1372                        "- failing attach\n");
1373         }
1374
1375         /* Install our software interrupt handlers */
1376         register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet");
1377         register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio");
1378 }
1379
1380 static cam_status
1381 xptregister(struct cam_periph *periph, void *arg)
1382 {
1383         if (periph == NULL) {
1384                 printf("xptregister: periph was NULL!!\n");
1385                 return(CAM_REQ_CMP_ERR);
1386         }
1387
1388         periph->softc = NULL;
1389
1390         xpt_periph = periph;
1391
1392         return(CAM_REQ_CMP);
1393 }
1394
1395 int32_t
1396 xpt_add_periph(struct cam_periph *periph)
1397 {
1398         struct cam_ed *device;
1399         int32_t  status;
1400         struct periph_list *periph_head;
1401
1402         device = periph->path->device;
1403
1404         periph_head = &device->periphs;
1405
1406         status = CAM_REQ_CMP;
1407
1408         if (device != NULL) {
1409                 int s;
1410
1411                 /*
1412                  * Make room for this peripheral
1413                  * so it will fit in the queue
1414                  * when it's scheduled to run
1415                  */
1416                 s = splsoftcam();
1417                 status = camq_resize(&device->drvq,
1418                                      device->drvq.array_size + 1);
1419
1420                 device->generation++;
1421
1422                 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1423
1424                 splx(s);
1425         }
1426
1427         xsoftc.generation++;
1428
1429         return (status);
1430 }
1431
1432 void
1433 xpt_remove_periph(struct cam_periph *periph)
1434 {
1435         struct cam_ed *device;
1436
1437         device = periph->path->device;
1438
1439         if (device != NULL) {
1440                 int s;
1441                 struct periph_list *periph_head;
1442
1443                 periph_head = &device->periphs;
1444                 
1445                 /* Release the slot for this peripheral */
1446                 s = splsoftcam();
1447                 camq_resize(&device->drvq, device->drvq.array_size - 1);
1448
1449                 device->generation++;
1450
1451                 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1452
1453                 splx(s);
1454         }
1455
1456         xsoftc.generation++;
1457
1458 }
1459
1460 void
1461 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1462 {
1463         int s;
1464         u_int mb;
1465         struct cam_path *path;
1466         struct ccb_trans_settings cts;
1467
1468         path = periph->path;
1469         /*
1470          * To ensure that this is printed in one piece,
1471          * mask out CAM interrupts.
1472          */
1473         s = splsoftcam();
1474         printf("%s%d at %s%d bus %d target %d lun %d\n",
1475                periph->periph_name, periph->unit_number,
1476                path->bus->sim->sim_name,
1477                path->bus->sim->unit_number,
1478                path->bus->sim->bus_id,
1479                path->target->target_id,
1480                path->device->lun_id);
1481         printf("%s%d: ", periph->periph_name, periph->unit_number);
1482         scsi_print_inquiry(&path->device->inq_data);
1483         if ((bootverbose)
1484          && (path->device->serial_num_len > 0)) {
1485                 /* Don't wrap the screen  - print only the first 60 chars */
1486                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1487                        periph->unit_number, path->device->serial_num);
1488         }
1489         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1490         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1491         cts.flags = CCB_TRANS_CURRENT_SETTINGS;
1492         xpt_action((union ccb*)&cts);
1493         if (cts.ccb_h.status == CAM_REQ_CMP) {
1494                 u_int speed;
1495                 u_int freq;
1496
1497                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1498                   && cts.sync_offset != 0) {
1499                         freq = scsi_calc_syncsrate(cts.sync_period);
1500                         speed = freq;
1501                 } else {
1502                         struct ccb_pathinq cpi;
1503
1504                         /* Ask the SIM for its base transfer speed */
1505                         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1506                         cpi.ccb_h.func_code = XPT_PATH_INQ;
1507                         xpt_action((union ccb *)&cpi);
1508
1509                         speed = cpi.base_transfer_speed;
1510                         freq = 0;
1511                 }
1512                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0)
1513                         speed *= (0x01 << cts.bus_width);
1514                 mb = speed / 1000;
1515                 if (mb > 0)
1516                         printf("%s%d: %d.%03dMB/s transfers",
1517                                periph->periph_name, periph->unit_number,
1518                                mb, speed % 1000);
1519                 else
1520                         printf("%s%d: %dKB/s transfers", periph->periph_name,
1521                                periph->unit_number, speed);
1522                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1523                  && cts.sync_offset != 0) {
1524                         printf(" (%d.%03dMHz, offset %d", freq / 1000,
1525                                freq % 1000, cts.sync_offset);
1526                 }
1527                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0
1528                  && cts.bus_width > 0) {
1529                         if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1530                          && cts.sync_offset != 0) {
1531                                 printf(", ");
1532                         } else {
1533                                 printf(" (");
1534                         }
1535                         printf("%dbit)", 8 * (0x01 << cts.bus_width));
1536                 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1537                         && cts.sync_offset != 0) {
1538                         printf(")");
1539                 }
1540
1541                 if (path->device->inq_flags & SID_CmdQue
1542                  || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1543                         printf(", Tagged Queueing Enabled");
1544                 }
1545
1546                 printf("\n");
1547         } else if (path->device->inq_flags & SID_CmdQue
1548                 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1549                 printf("%s%d: Tagged Queueing Enabled\n",
1550                        periph->periph_name, periph->unit_number);
1551         }
1552
1553         /*
1554          * We only want to print the caller's announce string if they've
1555          * passed one in..
1556          */
1557         if (announce_string != NULL)
1558                 printf("%s%d: %s\n", periph->periph_name,
1559                        periph->unit_number, announce_string);
1560         splx(s);
1561 }
1562
1563
1564 static dev_match_ret
1565 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns,
1566             struct cam_eb *bus)
1567 {
1568         dev_match_ret retval;
1569         int i;
1570
1571         retval = DM_RET_NONE;
1572
1573         /*
1574          * If we aren't given something to match against, that's an error.
1575          */
1576         if (bus == NULL)
1577                 return(DM_RET_ERROR);
1578
1579         /*
1580          * If there are no match entries, then this bus matches no
1581          * matter what.
1582          */
1583         if ((patterns == NULL) || (num_patterns == 0))
1584                 return(DM_RET_DESCEND | DM_RET_COPY);
1585
1586         for (i = 0; i < num_patterns; i++) {
1587                 struct bus_match_pattern *cur_pattern;
1588
1589                 /*
1590                  * If the pattern in question isn't for a bus node, we
1591                  * aren't interested.  However, we do indicate to the
1592                  * calling routine that we should continue descending the
1593                  * tree, since the user wants to match against lower-level
1594                  * EDT elements.
1595                  */
1596                 if (patterns[i].type != DEV_MATCH_BUS) {
1597                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1598                                 retval |= DM_RET_DESCEND;
1599                         continue;
1600                 }
1601
1602                 cur_pattern = &patterns[i].pattern.bus_pattern;
1603
1604                 /*
1605                  * If they want to match any bus node, we give them any
1606                  * device node.
1607                  */
1608                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1609                         /* set the copy flag */
1610                         retval |= DM_RET_COPY;
1611
1612                         /*
1613                          * If we've already decided on an action, go ahead
1614                          * and return.
1615                          */
1616                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1617                                 return(retval);
1618                 }
1619
1620                 /*
1621                  * Not sure why someone would do this...
1622                  */
1623                 if (cur_pattern->flags == BUS_MATCH_NONE)
1624                         continue;
1625
1626                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1627                  && (cur_pattern->path_id != bus->path_id))
1628                         continue;
1629
1630                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1631                  && (cur_pattern->bus_id != bus->sim->bus_id))
1632                         continue;
1633
1634                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1635                  && (cur_pattern->unit_number != bus->sim->unit_number))
1636                         continue;
1637
1638                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1639                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1640                              DEV_IDLEN) != 0))
1641                         continue;
1642
1643                 /*
1644                  * If we get to this point, the user definitely wants 
1645                  * information on this bus.  So tell the caller to copy the
1646                  * data out.
1647                  */
1648                 retval |= DM_RET_COPY;
1649
1650                 /*
1651                  * If the return action has been set to descend, then we
1652                  * know that we've already seen a non-bus matching
1653                  * expression, therefore we need to further descend the tree.
1654                  * This won't change by continuing around the loop, so we
1655                  * go ahead and return.  If we haven't seen a non-bus
1656                  * matching expression, we keep going around the loop until
1657                  * we exhaust the matching expressions.  We'll set the stop
1658                  * flag once we fall out of the loop.
1659                  */
1660                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1661                         return(retval);
1662         }
1663
1664         /*
1665          * If the return action hasn't been set to descend yet, that means
1666          * we haven't seen anything other than bus matching patterns.  So
1667          * tell the caller to stop descending the tree -- the user doesn't
1668          * want to match against lower level tree elements.
1669          */
1670         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1671                 retval |= DM_RET_STOP;
1672
1673         return(retval);
1674 }
1675
1676 static dev_match_ret
1677 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns,
1678                struct cam_ed *device)
1679 {
1680         dev_match_ret retval;
1681         int i;
1682
1683         retval = DM_RET_NONE;
1684
1685         /*
1686          * If we aren't given something to match against, that's an error.
1687          */
1688         if (device == NULL)
1689                 return(DM_RET_ERROR);
1690
1691         /*
1692          * If there are no match entries, then this device matches no
1693          * matter what.
1694          */
1695         if ((patterns == NULL) || (patterns == 0))
1696                 return(DM_RET_DESCEND | DM_RET_COPY);
1697
1698         for (i = 0; i < num_patterns; i++) {
1699                 struct device_match_pattern *cur_pattern;
1700
1701                 /*
1702                  * If the pattern in question isn't for a device node, we
1703                  * aren't interested.
1704                  */
1705                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1706                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1707                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1708                                 retval |= DM_RET_DESCEND;
1709                         continue;
1710                 }
1711
1712                 cur_pattern = &patterns[i].pattern.device_pattern;
1713
1714                 /*
1715                  * If they want to match any device node, we give them any
1716                  * device node.
1717                  */
1718                 if (cur_pattern->flags == DEV_MATCH_ANY) {
1719                         /* set the copy flag */
1720                         retval |= DM_RET_COPY;
1721
1722                         
1723                         /*
1724                          * If we've already decided on an action, go ahead
1725                          * and return.
1726                          */
1727                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1728                                 return(retval);
1729                 }
1730
1731                 /*
1732                  * Not sure why someone would do this...
1733                  */
1734                 if (cur_pattern->flags == DEV_MATCH_NONE)
1735                         continue;
1736
1737                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1738                  && (cur_pattern->path_id != device->target->bus->path_id))
1739                         continue;
1740
1741                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1742                  && (cur_pattern->target_id != device->target->target_id))
1743                         continue;
1744
1745                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1746                  && (cur_pattern->target_lun != device->lun_id))
1747                         continue;
1748
1749                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1750                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1751                                     (caddr_t)&cur_pattern->inq_pat,
1752                                     1, sizeof(cur_pattern->inq_pat),
1753                                     scsi_static_inquiry_match) == NULL))
1754                         continue;
1755
1756                 /*
1757                  * If we get to this point, the user definitely wants 
1758                  * information on this device.  So tell the caller to copy
1759                  * the data out.
1760                  */
1761                 retval |= DM_RET_COPY;
1762
1763                 /*
1764                  * If the return action has been set to descend, then we
1765                  * know that we've already seen a peripheral matching
1766                  * expression, therefore we need to further descend the tree.
1767                  * This won't change by continuing around the loop, so we
1768                  * go ahead and return.  If we haven't seen a peripheral
1769                  * matching expression, we keep going around the loop until
1770                  * we exhaust the matching expressions.  We'll set the stop
1771                  * flag once we fall out of the loop.
1772                  */
1773                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1774                         return(retval);
1775         }
1776
1777         /*
1778          * If the return action hasn't been set to descend yet, that means
1779          * we haven't seen any peripheral matching patterns.  So tell the
1780          * caller to stop descending the tree -- the user doesn't want to
1781          * match against lower level tree elements.
1782          */
1783         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1784                 retval |= DM_RET_STOP;
1785
1786         return(retval);
1787 }
1788
1789 /*
1790  * Match a single peripheral against any number of match patterns.
1791  */
1792 static dev_match_ret
1793 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns,
1794                struct cam_periph *periph)
1795 {
1796         dev_match_ret retval;
1797         int i;
1798
1799         /*
1800          * If we aren't given something to match against, that's an error.
1801          */
1802         if (periph == NULL)
1803                 return(DM_RET_ERROR);
1804
1805         /*
1806          * If there are no match entries, then this peripheral matches no
1807          * matter what.
1808          */
1809         if ((patterns == NULL) || (num_patterns == 0))
1810                 return(DM_RET_STOP | DM_RET_COPY);
1811
1812         /*
1813          * There aren't any nodes below a peripheral node, so there's no
1814          * reason to descend the tree any further.
1815          */
1816         retval = DM_RET_STOP;
1817
1818         for (i = 0; i < num_patterns; i++) {
1819                 struct periph_match_pattern *cur_pattern;
1820
1821                 /*
1822                  * If the pattern in question isn't for a peripheral, we
1823                  * aren't interested.
1824                  */
1825                 if (patterns[i].type != DEV_MATCH_PERIPH)
1826                         continue;
1827
1828                 cur_pattern = &patterns[i].pattern.periph_pattern;
1829
1830                 /*
1831                  * If they want to match on anything, then we will do so.
1832                  */
1833                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1834                         /* set the copy flag */
1835                         retval |= DM_RET_COPY;
1836
1837                         /*
1838                          * We've already set the return action to stop,
1839                          * since there are no nodes below peripherals in
1840                          * the tree.
1841                          */
1842                         return(retval);
1843                 }
1844
1845                 /*
1846                  * Not sure why someone would do this...
1847                  */
1848                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1849                         continue;
1850
1851                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1852                  && (cur_pattern->path_id != periph->path->bus->path_id))
1853                         continue;
1854
1855                 /*
1856                  * For the target and lun id's, we have to make sure the
1857                  * target and lun pointers aren't NULL.  The xpt peripheral
1858                  * has a wildcard target and device.
1859                  */
1860                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1861                  && ((periph->path->target == NULL)
1862                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1863                         continue;
1864
1865                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1866                  && ((periph->path->device == NULL)
1867                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1868                         continue;
1869
1870                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1871                  && (cur_pattern->unit_number != periph->unit_number))
1872                         continue;
1873
1874                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1875                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1876                              DEV_IDLEN) != 0))
1877                         continue;
1878
1879                 /*
1880                  * If we get to this point, the user definitely wants 
1881                  * information on this peripheral.  So tell the caller to
1882                  * copy the data out.
1883                  */
1884                 retval |= DM_RET_COPY;
1885
1886                 /*
1887                  * The return action has already been set to stop, since
1888                  * peripherals don't have any nodes below them in the EDT.
1889                  */
1890                 return(retval);
1891         }
1892
1893         /*
1894          * If we get to this point, the peripheral that was passed in
1895          * doesn't match any of the patterns.
1896          */
1897         return(retval);
1898 }
1899
1900 static int
1901 xptedtbusfunc(struct cam_eb *bus, void *arg)
1902 {
1903         struct ccb_dev_match *cdm;
1904         dev_match_ret retval;
1905
1906         cdm = (struct ccb_dev_match *)arg;
1907
1908         /*
1909          * If our position is for something deeper in the tree, that means
1910          * that we've already seen this node.  So, we keep going down.
1911          */
1912         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1913          && (cdm->pos.cookie.bus == bus)
1914          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1915          && (cdm->pos.cookie.target != NULL))
1916                 retval = DM_RET_DESCEND;
1917         else
1918                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1919
1920         /*
1921          * If we got an error, bail out of the search.
1922          */
1923         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1924                 cdm->status = CAM_DEV_MATCH_ERROR;
1925                 return(0);
1926         }
1927
1928         /*
1929          * If the copy flag is set, copy this bus out.
1930          */
1931         if (retval & DM_RET_COPY) {
1932                 int spaceleft, j;
1933
1934                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1935                         sizeof(struct dev_match_result));
1936
1937                 /*
1938                  * If we don't have enough space to put in another
1939                  * match result, save our position and tell the
1940                  * user there are more devices to check.
1941                  */
1942                 if (spaceleft < sizeof(struct dev_match_result)) {
1943                         bzero(&cdm->pos, sizeof(cdm->pos));
1944                         cdm->pos.position_type = 
1945                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1946
1947                         cdm->pos.cookie.bus = bus;
1948                         cdm->pos.generations[CAM_BUS_GENERATION]=
1949                                 bus_generation;
1950                         cdm->status = CAM_DEV_MATCH_MORE;
1951                         return(0);
1952                 }
1953                 j = cdm->num_matches;
1954                 cdm->num_matches++;
1955                 cdm->matches[j].type = DEV_MATCH_BUS;
1956                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1957                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1958                 cdm->matches[j].result.bus_result.unit_number =
1959                         bus->sim->unit_number;
1960                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1961                         bus->sim->sim_name, DEV_IDLEN);
1962         }
1963
1964         /*
1965          * If the user is only interested in busses, there's no
1966          * reason to descend to the next level in the tree.
1967          */
1968         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1969                 return(1);
1970
1971         /*
1972          * If there is a target generation recorded, check it to
1973          * make sure the target list hasn't changed.
1974          */
1975         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1976          && (bus == cdm->pos.cookie.bus)
1977          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1978          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
1979          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
1980              bus->generation)) {
1981                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1982                 return(0);
1983         }
1984
1985         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1986          && (cdm->pos.cookie.bus == bus)
1987          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1988          && (cdm->pos.cookie.target != NULL))
1989                 return(xpttargettraverse(bus,
1990                                         (struct cam_et *)cdm->pos.cookie.target,
1991                                          xptedttargetfunc, arg));
1992         else
1993                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
1994 }
1995
1996 static int
1997 xptedttargetfunc(struct cam_et *target, void *arg)
1998 {
1999         struct ccb_dev_match *cdm;
2000
2001         cdm = (struct ccb_dev_match *)arg;
2002
2003         /*
2004          * If there is a device list generation recorded, check it to
2005          * make sure the device list hasn't changed.
2006          */
2007         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2008          && (cdm->pos.cookie.bus == target->bus)
2009          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2010          && (cdm->pos.cookie.target == target)
2011          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2012          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2013          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2014              target->generation)) {
2015                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2016                 return(0);
2017         }
2018
2019         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2020          && (cdm->pos.cookie.bus == target->bus)
2021          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2022          && (cdm->pos.cookie.target == target)
2023          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2024          && (cdm->pos.cookie.device != NULL))
2025                 return(xptdevicetraverse(target,
2026                                         (struct cam_ed *)cdm->pos.cookie.device,
2027                                          xptedtdevicefunc, arg));
2028         else
2029                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2030 }
2031
2032 static int
2033 xptedtdevicefunc(struct cam_ed *device, void *arg)
2034 {
2035
2036         struct ccb_dev_match *cdm;
2037         dev_match_ret retval;
2038
2039         cdm = (struct ccb_dev_match *)arg;
2040
2041         /*
2042          * If our position is for something deeper in the tree, that means
2043          * that we've already seen this node.  So, we keep going down.
2044          */
2045         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2046          && (cdm->pos.cookie.device == device)
2047          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2048          && (cdm->pos.cookie.periph != NULL))
2049                 retval = DM_RET_DESCEND;
2050         else
2051                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2052                                         device);
2053
2054         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2055                 cdm->status = CAM_DEV_MATCH_ERROR;
2056                 return(0);
2057         }
2058
2059         /*
2060          * If the copy flag is set, copy this device out.
2061          */
2062         if (retval & DM_RET_COPY) {
2063                 int spaceleft, j;
2064
2065                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2066                         sizeof(struct dev_match_result));
2067
2068                 /*
2069                  * If we don't have enough space to put in another
2070                  * match result, save our position and tell the
2071                  * user there are more devices to check.
2072                  */
2073                 if (spaceleft < sizeof(struct dev_match_result)) {
2074                         bzero(&cdm->pos, sizeof(cdm->pos));
2075                         cdm->pos.position_type = 
2076                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2077                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2078
2079                         cdm->pos.cookie.bus = device->target->bus;
2080                         cdm->pos.generations[CAM_BUS_GENERATION]=
2081                                 bus_generation;
2082                         cdm->pos.cookie.target = device->target;
2083                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2084                                 device->target->bus->generation;
2085                         cdm->pos.cookie.device = device;
2086                         cdm->pos.generations[CAM_DEV_GENERATION] = 
2087                                 device->target->generation;
2088                         cdm->status = CAM_DEV_MATCH_MORE;
2089                         return(0);
2090                 }
2091                 j = cdm->num_matches;
2092                 cdm->num_matches++;
2093                 cdm->matches[j].type = DEV_MATCH_DEVICE;
2094                 cdm->matches[j].result.device_result.path_id =
2095                         device->target->bus->path_id;
2096                 cdm->matches[j].result.device_result.target_id =
2097                         device->target->target_id;
2098                 cdm->matches[j].result.device_result.target_lun =
2099                         device->lun_id;
2100                 bcopy(&device->inq_data,
2101                       &cdm->matches[j].result.device_result.inq_data,
2102                       sizeof(struct scsi_inquiry_data));
2103
2104                 /* Let the user know whether this device is unconfigured */
2105                 if (device->flags & CAM_DEV_UNCONFIGURED)
2106                         cdm->matches[j].result.device_result.flags =
2107                                 DEV_RESULT_UNCONFIGURED;
2108                 else
2109                         cdm->matches[j].result.device_result.flags =
2110                                 DEV_RESULT_NOFLAG;
2111         }
2112
2113         /*
2114          * If the user isn't interested in peripherals, don't descend
2115          * the tree any further.
2116          */
2117         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2118                 return(1);
2119
2120         /*
2121          * If there is a peripheral list generation recorded, make sure
2122          * it hasn't changed.
2123          */
2124         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2125          && (device->target->bus == cdm->pos.cookie.bus)
2126          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2127          && (device->target == cdm->pos.cookie.target)
2128          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2129          && (device == cdm->pos.cookie.device)
2130          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2131          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2132          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2133              device->generation)){
2134                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2135                 return(0);
2136         }
2137
2138         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2139          && (cdm->pos.cookie.bus == device->target->bus)
2140          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2141          && (cdm->pos.cookie.target == device->target)
2142          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2143          && (cdm->pos.cookie.device == device)
2144          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2145          && (cdm->pos.cookie.periph != NULL))
2146                 return(xptperiphtraverse(device,
2147                                 (struct cam_periph *)cdm->pos.cookie.periph,
2148                                 xptedtperiphfunc, arg));
2149         else
2150                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2151 }
2152
2153 static int
2154 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2155 {
2156         struct ccb_dev_match *cdm;
2157         dev_match_ret retval;
2158
2159         cdm = (struct ccb_dev_match *)arg;
2160
2161         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2162
2163         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2164                 cdm->status = CAM_DEV_MATCH_ERROR;
2165                 return(0);
2166         }
2167
2168         /*
2169          * If the copy flag is set, copy this peripheral out.
2170          */
2171         if (retval & DM_RET_COPY) {
2172                 int spaceleft, j;
2173
2174                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2175                         sizeof(struct dev_match_result));
2176
2177                 /*
2178                  * If we don't have enough space to put in another
2179                  * match result, save our position and tell the
2180                  * user there are more devices to check.
2181                  */
2182                 if (spaceleft < sizeof(struct dev_match_result)) {
2183                         bzero(&cdm->pos, sizeof(cdm->pos));
2184                         cdm->pos.position_type = 
2185                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2186                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2187                                 CAM_DEV_POS_PERIPH;
2188
2189                         cdm->pos.cookie.bus = periph->path->bus;
2190                         cdm->pos.generations[CAM_BUS_GENERATION]=
2191                                 bus_generation;
2192                         cdm->pos.cookie.target = periph->path->target;
2193                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2194                                 periph->path->bus->generation;
2195                         cdm->pos.cookie.device = periph->path->device;
2196                         cdm->pos.generations[CAM_DEV_GENERATION] = 
2197                                 periph->path->target->generation;
2198                         cdm->pos.cookie.periph = periph;
2199                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2200                                 periph->path->device->generation;
2201                         cdm->status = CAM_DEV_MATCH_MORE;
2202                         return(0);
2203                 }
2204
2205                 j = cdm->num_matches;
2206                 cdm->num_matches++;
2207                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2208                 cdm->matches[j].result.periph_result.path_id =
2209                         periph->path->bus->path_id;
2210                 cdm->matches[j].result.periph_result.target_id =
2211                         periph->path->target->target_id;
2212                 cdm->matches[j].result.periph_result.target_lun =
2213                         periph->path->device->lun_id;
2214                 cdm->matches[j].result.periph_result.unit_number =
2215                         periph->unit_number;
2216                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2217                         periph->periph_name, DEV_IDLEN);
2218         }
2219
2220         return(1);
2221 }
2222
2223 static int
2224 xptedtmatch(struct ccb_dev_match *cdm)
2225 {
2226         int ret;
2227
2228         cdm->num_matches = 0;
2229
2230         /*
2231          * Check the bus list generation.  If it has changed, the user
2232          * needs to reset everything and start over.
2233          */
2234         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2235          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2236          && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2237                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2238                 return(0);
2239         }
2240
2241         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2242          && (cdm->pos.cookie.bus != NULL))
2243                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2244                                      xptedtbusfunc, cdm);
2245         else
2246                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2247
2248         /*
2249          * If we get back 0, that means that we had to stop before fully
2250          * traversing the EDT.  It also means that one of the subroutines
2251          * has set the status field to the proper value.  If we get back 1,
2252          * we've fully traversed the EDT and copied out any matching entries.
2253          */
2254         if (ret == 1)
2255                 cdm->status = CAM_DEV_MATCH_LAST;
2256
2257         return(ret);
2258 }
2259
2260 static int
2261 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2262 {
2263         struct ccb_dev_match *cdm;
2264
2265         cdm = (struct ccb_dev_match *)arg;
2266
2267         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2268          && (cdm->pos.cookie.pdrv == pdrv)
2269          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2270          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2271          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2272              (*pdrv)->generation)) {
2273                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2274                 return(0);
2275         }
2276
2277         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2278          && (cdm->pos.cookie.pdrv == pdrv)
2279          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2280          && (cdm->pos.cookie.periph != NULL))
2281                 return(xptpdperiphtraverse(pdrv,
2282                                 (struct cam_periph *)cdm->pos.cookie.periph,
2283                                 xptplistperiphfunc, arg));
2284         else
2285                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2286 }
2287
2288 static int
2289 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2290 {
2291         struct ccb_dev_match *cdm;
2292         dev_match_ret retval;
2293
2294         cdm = (struct ccb_dev_match *)arg;
2295
2296         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2297
2298         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2299                 cdm->status = CAM_DEV_MATCH_ERROR;
2300                 return(0);
2301         }
2302
2303         /*
2304          * If the copy flag is set, copy this peripheral out.
2305          */
2306         if (retval & DM_RET_COPY) {
2307                 int spaceleft, j;
2308
2309                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2310                         sizeof(struct dev_match_result));
2311
2312                 /*
2313                  * If we don't have enough space to put in another
2314                  * match result, save our position and tell the
2315                  * user there are more devices to check.
2316                  */
2317                 if (spaceleft < sizeof(struct dev_match_result)) {
2318                         struct periph_driver **pdrv;
2319
2320                         pdrv = NULL;
2321                         bzero(&cdm->pos, sizeof(cdm->pos));
2322                         cdm->pos.position_type = 
2323                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2324                                 CAM_DEV_POS_PERIPH;
2325
2326                         /*
2327                          * This may look a bit non-sensical, but it is
2328                          * actually quite logical.  There are very few
2329                          * peripheral drivers, and bloating every peripheral
2330                          * structure with a pointer back to its parent
2331                          * peripheral driver linker set entry would cost
2332                          * more in the long run than doing this quick lookup.
2333                          */
2334                         SET_FOREACH(pdrv, periphdriver_set) {
2335                                 if (strcmp((*pdrv)->driver_name,
2336                                     periph->periph_name) == 0)
2337                                         break;
2338                         }
2339
2340                         if (pdrv == NULL) {
2341                                 cdm->status = CAM_DEV_MATCH_ERROR;
2342                                 return(0);
2343                         }
2344
2345                         cdm->pos.cookie.pdrv = pdrv;
2346                         /*
2347                          * The periph generation slot does double duty, as
2348                          * does the periph pointer slot.  They are used for
2349                          * both edt and pdrv lookups and positioning.
2350                          */
2351                         cdm->pos.cookie.periph = periph;
2352                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2353                                 (*pdrv)->generation;
2354                         cdm->status = CAM_DEV_MATCH_MORE;
2355                         return(0);
2356                 }
2357
2358                 j = cdm->num_matches;
2359                 cdm->num_matches++;
2360                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2361                 cdm->matches[j].result.periph_result.path_id =
2362                         periph->path->bus->path_id;
2363
2364                 /*
2365                  * The transport layer peripheral doesn't have a target or
2366                  * lun.
2367                  */
2368                 if (periph->path->target)
2369                         cdm->matches[j].result.periph_result.target_id =
2370                                 periph->path->target->target_id;
2371                 else
2372                         cdm->matches[j].result.periph_result.target_id = -1;
2373
2374                 if (periph->path->device)
2375                         cdm->matches[j].result.periph_result.target_lun =
2376                                 periph->path->device->lun_id;
2377                 else
2378                         cdm->matches[j].result.periph_result.target_lun = -1;
2379
2380                 cdm->matches[j].result.periph_result.unit_number =
2381                         periph->unit_number;
2382                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2383                         periph->periph_name, DEV_IDLEN);
2384         }
2385
2386         return(1);
2387 }
2388
2389 static int
2390 xptperiphlistmatch(struct ccb_dev_match *cdm)
2391 {
2392         int ret;
2393
2394         cdm->num_matches = 0;
2395
2396         /*
2397          * At this point in the edt traversal function, we check the bus
2398          * list generation to make sure that no busses have been added or
2399          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2400          * For the peripheral driver list traversal function, however, we
2401          * don't have to worry about new peripheral driver types coming or
2402          * going; they're in a linker set, and therefore can't change
2403          * without a recompile.
2404          */
2405
2406         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2407          && (cdm->pos.cookie.pdrv != NULL))
2408                 ret = xptpdrvtraverse(
2409                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2410                                 xptplistpdrvfunc, cdm);
2411         else
2412                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2413
2414         /*
2415          * If we get back 0, that means that we had to stop before fully
2416          * traversing the peripheral driver tree.  It also means that one of
2417          * the subroutines has set the status field to the proper value.  If
2418          * we get back 1, we've fully traversed the EDT and copied out any
2419          * matching entries.
2420          */
2421         if (ret == 1)
2422                 cdm->status = CAM_DEV_MATCH_LAST;
2423
2424         return(ret);
2425 }
2426
2427 static int
2428 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2429 {
2430         struct cam_eb *bus, *next_bus;
2431         int retval;
2432
2433         retval = 1;
2434
2435         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2436              bus != NULL;
2437              bus = next_bus) {
2438                 next_bus = TAILQ_NEXT(bus, links);
2439
2440                 retval = tr_func(bus, arg);
2441                 if (retval == 0)
2442                         return(retval);
2443         }
2444
2445         return(retval);
2446 }
2447
2448 static int
2449 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2450                   xpt_targetfunc_t *tr_func, void *arg)
2451 {
2452         struct cam_et *target, *next_target;
2453         int retval;
2454
2455         retval = 1;
2456         for (target = (start_target ? start_target :
2457                        TAILQ_FIRST(&bus->et_entries));
2458              target != NULL; target = next_target) {
2459
2460                 next_target = TAILQ_NEXT(target, links);
2461
2462                 retval = tr_func(target, arg);
2463
2464                 if (retval == 0)
2465                         return(retval);
2466         }
2467
2468         return(retval);
2469 }
2470
2471 static int
2472 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2473                   xpt_devicefunc_t *tr_func, void *arg)
2474 {
2475         struct cam_ed *device, *next_device;
2476         int retval;
2477
2478         retval = 1;
2479         for (device = (start_device ? start_device :
2480                        TAILQ_FIRST(&target->ed_entries));
2481              device != NULL;
2482              device = next_device) {
2483
2484                 next_device = TAILQ_NEXT(device, links);
2485
2486                 retval = tr_func(device, arg);
2487
2488                 if (retval == 0)
2489                         return(retval);
2490         }
2491
2492         return(retval);
2493 }
2494
2495 static int
2496 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2497                   xpt_periphfunc_t *tr_func, void *arg)
2498 {
2499         struct cam_periph *periph, *next_periph;
2500         int retval;
2501
2502         retval = 1;
2503
2504         for (periph = (start_periph ? start_periph :
2505                        SLIST_FIRST(&device->periphs));
2506              periph != NULL;
2507              periph = next_periph) {
2508
2509                 next_periph = SLIST_NEXT(periph, periph_links);
2510
2511                 retval = tr_func(periph, arg);
2512                 if (retval == 0)
2513                         return(retval);
2514         }
2515
2516         return(retval);
2517 }
2518
2519 static int
2520 xptpdrvtraverse(struct periph_driver **start_pdrv,
2521                 xpt_pdrvfunc_t *tr_func, void *arg)
2522 {
2523         struct periph_driver **pdrv;
2524         int retval;
2525
2526         retval = 1;
2527
2528         /*
2529          * We don't traverse the peripheral driver list like we do the
2530          * other lists, because it is a linker set, and therefore cannot be
2531          * changed during runtime.  If the peripheral driver list is ever
2532          * re-done to be something other than a linker set (i.e. it can
2533          * change while the system is running), the list traversal should
2534          * be modified to work like the other traversal functions.
2535          */
2536         SET_FOREACH(pdrv, periphdriver_set) {
2537                 if (start_pdrv == NULL || start_pdrv == pdrv) {
2538                         retval = tr_func(pdrv, arg);
2539                         if (retval == 0)
2540                                 return(retval);
2541                         start_pdrv = NULL; /* traverse remainder */
2542                 }
2543         }
2544         return(retval);
2545 }
2546
2547 static int
2548 xptpdperiphtraverse(struct periph_driver **pdrv,
2549                     struct cam_periph *start_periph,
2550                     xpt_periphfunc_t *tr_func, void *arg)
2551 {
2552         struct cam_periph *periph, *next_periph;
2553         int retval;
2554
2555         retval = 1;
2556
2557         for (periph = (start_periph ? start_periph :
2558              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2559              periph = next_periph) {
2560
2561                 next_periph = TAILQ_NEXT(periph, unit_links);
2562
2563                 retval = tr_func(periph, arg);
2564                 if (retval == 0)
2565                         return(retval);
2566         }
2567         return(retval);
2568 }
2569
2570 static int
2571 xptdefbusfunc(struct cam_eb *bus, void *arg)
2572 {
2573         struct xpt_traverse_config *tr_config;
2574
2575         tr_config = (struct xpt_traverse_config *)arg;
2576
2577         if (tr_config->depth == XPT_DEPTH_BUS) {
2578                 xpt_busfunc_t *tr_func;
2579
2580                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2581
2582                 return(tr_func(bus, tr_config->tr_arg));
2583         } else
2584                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2585 }
2586
2587 static int
2588 xptdeftargetfunc(struct cam_et *target, void *arg)
2589 {
2590         struct xpt_traverse_config *tr_config;
2591
2592         tr_config = (struct xpt_traverse_config *)arg;
2593
2594         if (tr_config->depth == XPT_DEPTH_TARGET) {
2595                 xpt_targetfunc_t *tr_func;
2596
2597                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2598
2599                 return(tr_func(target, tr_config->tr_arg));
2600         } else
2601                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2602 }
2603
2604 static int
2605 xptdefdevicefunc(struct cam_ed *device, void *arg)
2606 {
2607         struct xpt_traverse_config *tr_config;
2608
2609         tr_config = (struct xpt_traverse_config *)arg;
2610
2611         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2612                 xpt_devicefunc_t *tr_func;
2613
2614                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2615
2616                 return(tr_func(device, tr_config->tr_arg));
2617         } else
2618                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2619 }
2620
2621 static int
2622 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2623 {
2624         struct xpt_traverse_config *tr_config;
2625         xpt_periphfunc_t *tr_func;
2626
2627         tr_config = (struct xpt_traverse_config *)arg;
2628
2629         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2630
2631         /*
2632          * Unlike the other default functions, we don't check for depth
2633          * here.  The peripheral driver level is the last level in the EDT,
2634          * so if we're here, we should execute the function in question.
2635          */
2636         return(tr_func(periph, tr_config->tr_arg));
2637 }
2638
2639 /*
2640  * Execute the given function for every bus in the EDT.
2641  */
2642 static int
2643 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2644 {
2645         struct xpt_traverse_config tr_config;
2646
2647         tr_config.depth = XPT_DEPTH_BUS;
2648         tr_config.tr_func = tr_func;
2649         tr_config.tr_arg = arg;
2650
2651         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2652 }
2653
2654 #ifdef notusedyet
2655 /*
2656  * Execute the given function for every target in the EDT.
2657  */
2658 static int
2659 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2660 {
2661         struct xpt_traverse_config tr_config;
2662
2663         tr_config.depth = XPT_DEPTH_TARGET;
2664         tr_config.tr_func = tr_func;
2665         tr_config.tr_arg = arg;
2666
2667         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2668 }
2669 #endif /* notusedyet */
2670
2671 /*
2672  * Execute the given function for every device in the EDT.
2673  */
2674 static int
2675 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2676 {
2677         struct xpt_traverse_config tr_config;
2678
2679         tr_config.depth = XPT_DEPTH_DEVICE;
2680         tr_config.tr_func = tr_func;
2681         tr_config.tr_arg = arg;
2682
2683         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2684 }
2685
2686 #ifdef notusedyet
2687 /*
2688  * Execute the given function for every peripheral in the EDT.
2689  */
2690 static int
2691 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2692 {
2693         struct xpt_traverse_config tr_config;
2694
2695         tr_config.depth = XPT_DEPTH_PERIPH;
2696         tr_config.tr_func = tr_func;
2697         tr_config.tr_arg = arg;
2698
2699         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2700 }
2701 #endif /* notusedyet */
2702
2703 static int
2704 xptsetasyncfunc(struct cam_ed *device, void *arg)
2705 {
2706         struct cam_path path;
2707         struct ccb_getdev cgd;
2708         struct async_node *cur_entry;
2709
2710         cur_entry = (struct async_node *)arg;
2711
2712         /*
2713          * Don't report unconfigured devices (Wildcard devs,
2714          * devices only for target mode, device instances
2715          * that have been invalidated but are waiting for
2716          * their last reference count to be released).
2717          */
2718         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2719                 return (1);
2720
2721         xpt_compile_path(&path,
2722                          NULL,
2723                          device->target->bus->path_id,
2724                          device->target->target_id,
2725                          device->lun_id);
2726         xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2727         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2728         xpt_action((union ccb *)&cgd);
2729         cur_entry->callback(cur_entry->callback_arg,
2730                             AC_FOUND_DEVICE,
2731                             &path, &cgd);
2732         xpt_release_path(&path);
2733
2734         return(1);
2735 }
2736
2737 static int
2738 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2739 {
2740         struct cam_path path;
2741         struct ccb_pathinq cpi;
2742         struct async_node *cur_entry;
2743
2744         cur_entry = (struct async_node *)arg;
2745
2746         xpt_compile_path(&path, /*periph*/NULL,
2747                          bus->sim->path_id,
2748                          CAM_TARGET_WILDCARD,
2749                          CAM_LUN_WILDCARD);
2750         xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2751         cpi.ccb_h.func_code = XPT_PATH_INQ;
2752         xpt_action((union ccb *)&cpi);
2753         cur_entry->callback(cur_entry->callback_arg,
2754                             AC_PATH_REGISTERED,
2755                             &path, &cpi);
2756         xpt_release_path(&path);
2757
2758         return(1);
2759 }
2760
2761 void
2762 xpt_action(union ccb *start_ccb)
2763 {
2764         int iopl;
2765
2766         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2767
2768         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2769
2770         iopl = splsoftcam();
2771         switch (start_ccb->ccb_h.func_code) {
2772         case XPT_SCSI_IO:
2773         {
2774 #ifdef CAMDEBUG
2775                 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
2776                 struct cam_path *path;
2777
2778                 path = start_ccb->ccb_h.path;
2779 #endif
2780
2781                 /*
2782                  * For the sake of compatibility with SCSI-1
2783                  * devices that may not understand the identify
2784                  * message, we include lun information in the
2785                  * second byte of all commands.  SCSI-1 specifies
2786                  * that luns are a 3 bit value and reserves only 3
2787                  * bits for lun information in the CDB.  Later
2788                  * revisions of the SCSI spec allow for more than 8
2789                  * luns, but have deprecated lun information in the
2790                  * CDB.  So, if the lun won't fit, we must omit.
2791                  *
2792                  * Also be aware that during initial probing for devices,
2793                  * the inquiry information is unknown but initialized to 0.
2794                  * This means that this code will be exercised while probing
2795                  * devices with an ANSI revision greater than 2.
2796                  */
2797                 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2
2798                  && start_ccb->ccb_h.target_lun < 8
2799                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2800
2801                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2802                             start_ccb->ccb_h.target_lun << 5;
2803                 }
2804                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2805                 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
2806                           scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
2807                                        &path->device->inq_data),
2808                           scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
2809                                           cdb_str, sizeof(cdb_str))));
2810                 /* FALLTHROUGH */
2811         }
2812         case XPT_TARGET_IO:
2813         case XPT_CONT_TARGET_IO:
2814                 start_ccb->csio.sense_resid = 0;
2815                 start_ccb->csio.resid = 0;
2816                 /* FALLTHROUGH */
2817         case XPT_RESET_DEV:
2818         case XPT_ENG_EXEC:
2819         {
2820                 struct cam_path *path;
2821                 int s;
2822                 int runq;
2823
2824                 path = start_ccb->ccb_h.path;
2825                 s = splsoftcam();
2826
2827                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2828                 if (path->device->qfrozen_cnt == 0)
2829                         runq = xpt_schedule_dev_sendq(path->bus, path->device);
2830                 else
2831                         runq = 0;
2832                 splx(s);
2833                 if (runq != 0)
2834                         xpt_run_dev_sendq(path->bus);
2835                 break;
2836         }
2837         case XPT_SET_TRAN_SETTINGS:
2838         {
2839                 xpt_set_transfer_settings(&start_ccb->cts,
2840                                           start_ccb->ccb_h.path->device,
2841                                           /*async_update*/FALSE);
2842                 break;
2843         }
2844         case XPT_CALC_GEOMETRY:
2845         {
2846                 struct cam_sim *sim;
2847
2848                 /* Filter out garbage */
2849                 if (start_ccb->ccg.block_size == 0
2850                  || start_ccb->ccg.volume_size == 0) {
2851                         start_ccb->ccg.cylinders = 0;
2852                         start_ccb->ccg.heads = 0;
2853                         start_ccb->ccg.secs_per_track = 0;
2854                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2855                         break;
2856                 }
2857 #ifdef PC98
2858                 /*
2859                  * In a PC-98 system, geometry translation depens on
2860                  * the "real" device geometry obtained from mode page 4.
2861                  * SCSI geometry translation is performed in the
2862                  * initialization routine of the SCSI BIOS and the result
2863                  * stored in host memory.  If the translation is available
2864                  * in host memory, use it.  If not, rely on the default
2865                  * translation the device driver performs.
2866                  */
2867                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2868                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2869                         break;
2870                 }
2871 #endif
2872                 sim = start_ccb->ccb_h.path->bus->sim;
2873                 (*(sim->sim_action))(sim, start_ccb);
2874                 break;
2875         }
2876         case XPT_ABORT:
2877         {
2878                 union ccb* abort_ccb;
2879                 int s;                          
2880
2881                 abort_ccb = start_ccb->cab.abort_ccb;
2882                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2883
2884                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2885                                 struct cam_ccbq *ccbq;
2886
2887                                 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
2888                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2889                                 abort_ccb->ccb_h.status =
2890                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2891                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2892                                 s = splcam();
2893                                 xpt_done(abort_ccb);
2894                                 splx(s);
2895                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2896                                 break;
2897                         }
2898                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2899                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2900                                 /*
2901                                  * We've caught this ccb en route to
2902                                  * the SIM.  Flag it for abort and the
2903                                  * SIM will do so just before starting
2904                                  * real work on the CCB.
2905                                  */
2906                                 abort_ccb->ccb_h.status =
2907                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2908                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2909                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2910                                 break;
2911                         }
2912                 } 
2913                 if (XPT_FC_IS_QUEUED(abort_ccb)
2914                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2915                         /*
2916                          * It's already completed but waiting
2917                          * for our SWI to get to it.
2918                          */
2919                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2920                         break;
2921                 }
2922                 /*
2923                  * If we weren't able to take care of the abort request
2924                  * in the XPT, pass the request down to the SIM for processing.
2925                  */
2926                 /* FALLTHROUGH */
2927         }
2928         case XPT_ACCEPT_TARGET_IO:
2929         case XPT_EN_LUN:
2930         case XPT_IMMED_NOTIFY:
2931         case XPT_NOTIFY_ACK:
2932         case XPT_GET_TRAN_SETTINGS:
2933         case XPT_RESET_BUS:
2934         {
2935                 struct cam_sim *sim;
2936
2937                 sim = start_ccb->ccb_h.path->bus->sim;
2938                 (*(sim->sim_action))(sim, start_ccb);
2939                 break;
2940         }
2941         case XPT_PATH_INQ:
2942         {
2943                 struct cam_sim *sim;
2944
2945                 sim = start_ccb->ccb_h.path->bus->sim;
2946                 (*(sim->sim_action))(sim, start_ccb);
2947                 break;
2948         }
2949         case XPT_PATH_STATS:
2950                 start_ccb->cpis.last_reset =
2951                         start_ccb->ccb_h.path->bus->last_reset;
2952                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2953                 break;
2954         case XPT_GDEV_TYPE:
2955         {
2956                 struct cam_ed *dev;
2957                 int s;
2958
2959                 dev = start_ccb->ccb_h.path->device;
2960                 s = splcam();
2961                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2962                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2963                 } else {
2964                         struct ccb_getdev *cgd;
2965                         struct cam_eb *bus;
2966                         struct cam_et *tar;
2967
2968                         cgd = &start_ccb->cgd;
2969                         bus = cgd->ccb_h.path->bus;
2970                         tar = cgd->ccb_h.path->target;
2971                         cgd->inq_data = dev->inq_data;
2972                         cgd->ccb_h.status = CAM_REQ_CMP;
2973                         cgd->serial_num_len = dev->serial_num_len;
2974                         if ((dev->serial_num_len > 0)
2975                          && (dev->serial_num != NULL))
2976                                 bcopy(dev->serial_num, cgd->serial_num,
2977                                       dev->serial_num_len);
2978                 }
2979                 splx(s);
2980                 break; 
2981         }
2982         case XPT_GDEV_STATS:
2983         {
2984                 struct cam_ed *dev;
2985                 int s;
2986
2987                 dev = start_ccb->ccb_h.path->device;
2988                 s = splcam();
2989                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2990                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2991                 } else {
2992                         struct ccb_getdevstats *cgds;
2993                         struct cam_eb *bus;
2994                         struct cam_et *tar;
2995
2996                         cgds = &start_ccb->cgds;
2997                         bus = cgds->ccb_h.path->bus;
2998                         tar = cgds->ccb_h.path->target;
2999                         cgds->dev_openings = dev->ccbq.dev_openings;
3000                         cgds->dev_active = dev->ccbq.dev_active;
3001                         cgds->devq_openings = dev->ccbq.devq_openings;
3002                         cgds->devq_queued = dev->ccbq.queue.entries;
3003                         cgds->held = dev->ccbq.held;
3004                         cgds->last_reset = tar->last_reset;
3005                         cgds->maxtags = dev->quirk->maxtags;
3006                         cgds->mintags = dev->quirk->mintags;
3007                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3008                                 cgds->last_reset = bus->last_reset;
3009                         cgds->ccb_h.status = CAM_REQ_CMP;
3010                 }
3011                 splx(s);
3012                 break;
3013         }
3014         case XPT_GDEVLIST:
3015         {
3016                 struct cam_periph       *nperiph;
3017                 struct periph_list      *periph_head;
3018                 struct ccb_getdevlist   *cgdl;
3019                 int                     i;
3020                 int                     s;
3021                 struct cam_ed           *device;
3022                 int                     found;
3023
3024
3025                 found = 0;
3026
3027                 /*
3028                  * Don't want anyone mucking with our data.
3029                  */
3030                 s = splcam();
3031                 device = start_ccb->ccb_h.path->device;
3032                 periph_head = &device->periphs;
3033                 cgdl = &start_ccb->cgdl;
3034
3035                 /*
3036                  * Check and see if the list has changed since the user
3037                  * last requested a list member.  If so, tell them that the
3038                  * list has changed, and therefore they need to start over 
3039                  * from the beginning.
3040                  */
3041                 if ((cgdl->index != 0) && 
3042                     (cgdl->generation != device->generation)) {
3043                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3044                         splx(s);
3045                         break;
3046                 }
3047
3048                 /*
3049                  * Traverse the list of peripherals and attempt to find 
3050                  * the requested peripheral.
3051                  */
3052                 for (nperiph = periph_head->slh_first, i = 0;
3053                      (nperiph != NULL) && (i <= cgdl->index);
3054                      nperiph = nperiph->periph_links.sle_next, i++) {
3055                         if (i == cgdl->index) {
3056                                 strncpy(cgdl->periph_name,
3057                                         nperiph->periph_name,
3058                                         DEV_IDLEN);
3059                                 cgdl->unit_number = nperiph->unit_number;
3060                                 found = 1;
3061                         }
3062                 }
3063                 if (found == 0) {
3064                         cgdl->status = CAM_GDEVLIST_ERROR;
3065                         splx(s);
3066                         break;
3067                 }
3068
3069                 if (nperiph == NULL)
3070                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3071                 else
3072                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3073
3074                 cgdl->index++;
3075                 cgdl->generation = device->generation;
3076
3077                 splx(s);
3078                 cgdl->ccb_h.status = CAM_REQ_CMP;
3079                 break;
3080         }
3081         case XPT_DEV_MATCH:
3082         {
3083                 int s;
3084                 dev_pos_type position_type;
3085                 struct ccb_dev_match *cdm;
3086                 int ret;
3087
3088                 cdm = &start_ccb->cdm;
3089
3090                 /*
3091                  * Prevent EDT changes while we traverse it.
3092                  */
3093                 s = splcam();
3094                 /*
3095                  * There are two ways of getting at information in the EDT.
3096                  * The first way is via the primary EDT tree.  It starts
3097                  * with a list of busses, then a list of targets on a bus,
3098                  * then devices/luns on a target, and then peripherals on a
3099                  * device/lun.  The "other" way is by the peripheral driver
3100                  * lists.  The peripheral driver lists are organized by
3101                  * peripheral driver.  (obviously)  So it makes sense to
3102                  * use the peripheral driver list if the user is looking
3103                  * for something like "da1", or all "da" devices.  If the
3104                  * user is looking for something on a particular bus/target
3105                  * or lun, it's generally better to go through the EDT tree.
3106                  */
3107
3108                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3109                         position_type = cdm->pos.position_type;
3110                 else {
3111                         int i;
3112
3113                         position_type = CAM_DEV_POS_NONE;
3114
3115                         for (i = 0; i < cdm->num_patterns; i++) {
3116                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3117                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3118                                         position_type = CAM_DEV_POS_EDT;
3119                                         break;
3120                                 }
3121                         }
3122
3123                         if (cdm->num_patterns == 0)
3124                                 position_type = CAM_DEV_POS_EDT;
3125                         else if (position_type == CAM_DEV_POS_NONE)
3126                                 position_type = CAM_DEV_POS_PDRV;
3127                 }
3128
3129                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3130                 case CAM_DEV_POS_EDT:
3131                         ret = xptedtmatch(cdm);
3132                         break;
3133                 case CAM_DEV_POS_PDRV:
3134                         ret = xptperiphlistmatch(cdm);
3135                         break;
3136                 default:
3137                         cdm->status = CAM_DEV_MATCH_ERROR;
3138                         break;
3139                 }
3140
3141                 splx(s);
3142
3143                 if (cdm->status == CAM_DEV_MATCH_ERROR)
3144                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3145                 else
3146                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3147
3148                 break;
3149         }
3150         case XPT_SASYNC_CB:
3151         {
3152                 struct ccb_setasync *csa;
3153                 struct async_node *cur_entry;
3154                 struct async_list *async_head;
3155                 u_int32_t added;
3156                 int s;
3157
3158                 csa = &start_ccb->csa;
3159                 added = csa->event_enable;
3160                 async_head = &csa->ccb_h.path->device->asyncs;
3161
3162                 /*
3163                  * If there is already an entry for us, simply
3164                  * update it.
3165                  */
3166                 s = splcam();
3167                 cur_entry = SLIST_FIRST(async_head);
3168                 while (cur_entry != NULL) {
3169                         if ((cur_entry->callback_arg == csa->callback_arg)
3170                          && (cur_entry->callback == csa->callback))
3171                                 break;
3172                         cur_entry = SLIST_NEXT(cur_entry, links);
3173                 }
3174
3175                 if (cur_entry != NULL) {
3176                         /*
3177                          * If the request has no flags set,
3178                          * remove the entry.
3179                          */
3180                         added &= ~cur_entry->event_enable;
3181                         if (csa->event_enable == 0) {
3182                                 SLIST_REMOVE(async_head, cur_entry,
3183                                              async_node, links);
3184                                 csa->ccb_h.path->device->refcount--;
3185                                 free(cur_entry, M_DEVBUF);
3186                         } else {
3187                                 cur_entry->event_enable = csa->event_enable;
3188                         }
3189                 } else {
3190                         cur_entry = malloc(sizeof(*cur_entry), 
3191                                             M_DEVBUF, M_INTWAIT);
3192                         cur_entry->event_enable = csa->event_enable;
3193                         cur_entry->callback_arg = csa->callback_arg;
3194                         cur_entry->callback = csa->callback;
3195                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3196                         csa->ccb_h.path->device->refcount++;
3197                 }
3198
3199                 if ((added & AC_FOUND_DEVICE) != 0) {
3200                         /*
3201                          * Get this peripheral up to date with all
3202                          * the currently existing devices.
3203                          */
3204                         xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3205                 }
3206                 if ((added & AC_PATH_REGISTERED) != 0) {
3207                         /*
3208                          * Get this peripheral up to date with all
3209                          * the currently existing busses.
3210                          */
3211                         xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3212                 }
3213                 splx(s);
3214                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3215                 break;
3216         }
3217         case XPT_REL_SIMQ:
3218         {
3219                 struct ccb_relsim *crs;
3220                 struct cam_ed *dev;
3221                 int s;
3222
3223                 crs = &start_ccb->crs;
3224                 dev = crs->ccb_h.path->device;
3225                 if (dev == NULL) {
3226
3227                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3228                         break;
3229                 }
3230
3231                 s = splcam();
3232
3233                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3234
3235                         if ((dev->inq_data.flags & SID_CmdQue) != 0) {
3236
3237                                 /* Don't ever go below one opening */
3238                                 if (crs->openings > 0) {
3239                                         xpt_dev_ccbq_resize(crs->ccb_h.path,
3240                                                             crs->openings);
3241
3242                                         if (bootverbose) {
3243                                                 xpt_print_path(crs->ccb_h.path);
3244                                                 printf("tagged openings "
3245                                                        "now %d\n",
3246                                                        crs->openings);
3247                                         }
3248                                 }
3249                         }
3250                 }
3251
3252                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3253
3254                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3255
3256                                 /*
3257                                  * Just extend the old timeout and decrement
3258                                  * the freeze count so that a single timeout
3259                                  * is sufficient for releasing the queue.
3260                                  */
3261                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3262                                 untimeout(xpt_release_devq_timeout,
3263                                           dev, dev->c_handle);
3264                         } else {
3265
3266                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3267                         }
3268
3269                         dev->c_handle =
3270                                 timeout(xpt_release_devq_timeout,
3271                                         dev,
3272                                         (crs->release_timeout * hz) / 1000);
3273
3274                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3275
3276                 }
3277
3278                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3279
3280                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3281                                 /*
3282                                  * Decrement the freeze count so that a single
3283                                  * completion is still sufficient to unfreeze
3284                                  * the queue.
3285                                  */
3286                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3287                         } else {
3288                                 
3289                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3290                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3291                         }
3292                 }
3293
3294                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3295
3296                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3297                          || (dev->ccbq.dev_active == 0)) {
3298
3299                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3300                         } else {
3301                                 
3302                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3303                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3304                         }
3305                 }
3306                 splx(s);
3307                 
3308                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3309
3310                         xpt_release_devq(crs->ccb_h.path, /*count*/1,
3311                                          /*run_queue*/TRUE);
3312                 }
3313                 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3314                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3315                 break;
3316         }
3317         case XPT_SCAN_BUS:
3318                 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3319                 break;
3320         case XPT_SCAN_LUN:
3321                 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3322                              start_ccb->ccb_h.path, start_ccb->crcn.flags,
3323                              start_ccb);
3324                 break;
3325         case XPT_DEBUG: {
3326 #ifdef CAMDEBUG
3327                 int s;
3328                 
3329                 s = splcam();
3330 #ifdef CAM_DEBUG_DELAY
3331                 cam_debug_delay = CAM_DEBUG_DELAY;
3332 #endif
3333                 cam_dflags = start_ccb->cdbg.flags;
3334                 if (cam_dpath != NULL) {
3335                         xpt_free_path(cam_dpath);
3336                         cam_dpath = NULL;
3337                 }
3338
3339                 if (cam_dflags != CAM_DEBUG_NONE) {
3340                         if (xpt_create_path(&cam_dpath, xpt_periph,
3341                                             start_ccb->ccb_h.path_id,
3342                                             start_ccb->ccb_h.target_id,
3343                                             start_ccb->ccb_h.target_lun) !=
3344                                             CAM_REQ_CMP) {
3345                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3346                                 cam_dflags = CAM_DEBUG_NONE;
3347                         } else {
3348                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3349                                 xpt_print_path(cam_dpath);
3350                                 printf("debugging flags now %x\n", cam_dflags);
3351                         }
3352                 } else {
3353                         cam_dpath = NULL;
3354                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3355                 }
3356                 splx(s);
3357 #else /* !CAMDEBUG */
3358                 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3359 #endif /* CAMDEBUG */
3360                 break;
3361         }
3362         case XPT_NOOP:
3363                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3364                         xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3365                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3366                 break;
3367         default:
3368         case XPT_SDEV_TYPE:
3369         case XPT_TERM_IO:
3370         case XPT_ENG_INQ:
3371                 /* XXX Implement */
3372                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3373                 break;
3374         }
3375         splx(iopl);
3376 }
3377
3378 void
3379 xpt_polled_action(union ccb *start_ccb)
3380 {
3381         int       s;
3382         u_int32_t timeout;
3383         struct    cam_sim *sim; 
3384         struct    cam_devq *devq;
3385         struct    cam_ed *dev;
3386
3387         timeout = start_ccb->ccb_h.timeout;
3388         sim = start_ccb->ccb_h.path->bus->sim;
3389         devq = sim->devq;
3390         dev = start_ccb->ccb_h.path->device;
3391
3392         s = splcam();
3393
3394         /*
3395          * Steal an opening so that no other queued requests
3396          * can get it before us while we simulate interrupts.
3397          */
3398         dev->ccbq.devq_openings--;
3399         dev->ccbq.dev_openings--;       
3400         
3401         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0)
3402            && (--timeout > 0)) {
3403                 DELAY(1000);
3404                 (*(sim->sim_poll))(sim);
3405                 swi_camnet(NULL);
3406                 swi_cambio(NULL);               
3407         }
3408         
3409         dev->ccbq.devq_openings++;
3410         dev->ccbq.dev_openings++;
3411         
3412         if (timeout != 0) {
3413                 xpt_action(start_ccb);
3414                 while(--timeout > 0) {
3415                         (*(sim->sim_poll))(sim);
3416                         swi_camnet(NULL);
3417                         swi_cambio(NULL);
3418                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3419                             != CAM_REQ_INPROG)
3420                                 break;
3421                         DELAY(1000);
3422                 }
3423                 if (timeout == 0) {
3424                         /*
3425                          * XXX Is it worth adding a sim_timeout entry
3426                          * point so we can attempt recovery?  If
3427                          * this is only used for dumps, I don't think
3428                          * it is.
3429                          */
3430                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3431                 }
3432         } else {
3433                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3434         }
3435         splx(s);
3436 }
3437         
3438 /*
3439  * Schedule a peripheral driver to receive a ccb when it's
3440  * target device has space for more transactions.
3441  */
3442 void
3443 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3444 {
3445         struct cam_ed *device;
3446         int s;
3447         int runq;
3448
3449         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3450         device = perph->path->device;
3451         s = splsoftcam();
3452         if (periph_is_queued(perph)) {
3453                 /* Simply reorder based on new priority */
3454                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3455                           ("   change priority to %d\n", new_priority));
3456                 if (new_priority < perph->pinfo.priority) {
3457                         camq_change_priority(&device->drvq,
3458                                              perph->pinfo.index,
3459                                              new_priority);
3460                 }
3461                 runq = 0;
3462         } else {
3463                 /* New entry on the queue */
3464                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3465                           ("   added periph to queue\n"));
3466                 perph->pinfo.priority = new_priority;
3467                 perph->pinfo.generation = ++device->drvq.generation;
3468                 camq_insert(&device->drvq, &perph->pinfo);
3469                 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3470         }
3471         splx(s);
3472         if (runq != 0) {
3473                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3474                           ("   calling xpt_run_devq\n"));
3475                 xpt_run_dev_allocq(perph->path->bus);
3476         }
3477 }
3478
3479
3480 /*
3481  * Schedule a device to run on a given queue.
3482  * If the device was inserted as a new entry on the queue,
3483  * return 1 meaning the device queue should be run. If we
3484  * were already queued, implying someone else has already
3485  * started the queue, return 0 so the caller doesn't attempt
3486  * to run the queue.  Must be run at either splsoftcam
3487  * (or splcam since that encompases splsoftcam).
3488  */
3489 static int
3490 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3491                  u_int32_t new_priority)
3492 {
3493         int retval;
3494         u_int32_t old_priority;
3495
3496         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3497
3498         old_priority = pinfo->priority;
3499
3500         /*
3501          * Are we already queued?
3502          */
3503         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3504                 /* Simply reorder based on new priority */
3505                 if (new_priority < old_priority) {
3506                         camq_change_priority(queue, pinfo->index,
3507                                              new_priority);
3508                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3509                                         ("changed priority to %d\n",
3510                                          new_priority));
3511                 }
3512                 retval = 0;
3513         } else {
3514                 /* New entry on the queue */
3515                 if (new_priority < old_priority)
3516                         pinfo->priority = new_priority;
3517
3518                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3519                                 ("Inserting onto queue\n"));
3520                 pinfo->generation = ++queue->generation;
3521                 camq_insert(queue, pinfo);
3522                 retval = 1;
3523         }
3524         return (retval);
3525 }
3526
3527 static void
3528 xpt_run_dev_allocq(struct cam_eb *bus)
3529 {
3530         struct  cam_devq *devq;
3531         int     s;
3532
3533         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3534         devq = bus->sim->devq;
3535
3536         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3537                         ("   qfrozen_cnt == 0x%x, entries == %d, "
3538                          "openings == %d, active == %d\n",
3539                          devq->alloc_queue.qfrozen_cnt,
3540                          devq->alloc_queue.entries,
3541                          devq->alloc_openings,
3542                          devq->alloc_active));
3543
3544         s = splsoftcam();
3545         devq->alloc_queue.qfrozen_cnt++;
3546         while ((devq->alloc_queue.entries > 0)
3547             && (devq->alloc_openings > 0)
3548             && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3549                 struct  cam_ed_qinfo *qinfo;
3550                 struct  cam_ed *device;
3551                 union   ccb *work_ccb;
3552                 struct  cam_periph *drv;
3553                 struct  camq *drvq;
3554                 
3555                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3556                                                            CAMQ_HEAD);
3557                 device = qinfo->device;
3558
3559                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3560                                 ("running device %p\n", device));
3561
3562                 drvq = &device->drvq;
3563
3564 #ifdef CAMDEBUG
3565                 if (drvq->entries <= 0) {
3566                         panic("xpt_run_dev_allocq: "
3567                               "Device on queue without any work to do");
3568                 }
3569 #endif
3570                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3571                         devq->alloc_openings--;
3572                         devq->alloc_active++;
3573                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3574                         splx(s);
3575                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3576                                       drv->pinfo.priority);
3577                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3578                                         ("calling periph start\n"));
3579                         drv->periph_start(drv, work_ccb);
3580                 } else {
3581                         /*
3582                          * Malloc failure in alloc_ccb
3583                          */
3584                         /*
3585                          * XXX add us to a list to be run from free_ccb
3586                          * if we don't have any ccbs active on this
3587                          * device queue otherwise we may never get run
3588                          * again.
3589                          */
3590                         break;
3591                 }
3592         
3593                 /* Raise IPL for possible insertion and test at top of loop */
3594                 s = splsoftcam();
3595
3596                 if (drvq->entries > 0) {
3597                         /* We have more work.  Attempt to reschedule */
3598                         xpt_schedule_dev_allocq(bus, device);
3599                 }
3600         }
3601         devq->alloc_queue.qfrozen_cnt--;
3602         splx(s);
3603 }
3604
3605 static void
3606 xpt_run_dev_sendq(struct cam_eb *bus)
3607 {
3608         struct  cam_devq *devq;
3609         int     s;
3610
3611         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3612         
3613         devq = bus->sim->devq;
3614
3615         s = splcam();
3616         devq->send_queue.qfrozen_cnt++;
3617         splx(s);
3618         s = splsoftcam();
3619         while ((devq->send_queue.entries > 0)
3620             && (devq->send_openings > 0)) {
3621                 struct  cam_ed_qinfo *qinfo;
3622                 struct  cam_ed *device;
3623                 union ccb *work_ccb;
3624                 struct  cam_sim *sim;
3625                 int     ospl;
3626
3627                 ospl = splcam();
3628                 if (devq->send_queue.qfrozen_cnt > 1) {
3629                         splx(ospl);
3630                         break;
3631                 }
3632
3633                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3634                                                            CAMQ_HEAD);
3635                 device = qinfo->device;
3636
3637                 /*
3638                  * If the device has been "frozen", don't attempt
3639                  * to run it.
3640                  */
3641                 if (device->qfrozen_cnt > 0) {
3642                         splx(ospl);
3643                         continue;
3644                 }
3645
3646                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3647                                 ("running device %p\n", device));
3648
3649                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3650                 if (work_ccb == NULL) {
3651                         printf("device on run queue with no ccbs???\n");
3652                         splx(ospl);
3653                         continue;
3654                 }
3655
3656                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3657
3658                         if (num_highpower <= 0) {
3659                                 /*
3660                                  * We got a high power command, but we
3661                                  * don't have any available slots.  Freeze
3662                                  * the device queue until we have a slot
3663                                  * available.
3664                                  */
3665                                 device->qfrozen_cnt++;
3666                                 STAILQ_INSERT_TAIL(&highpowerq, 
3667                                                    &work_ccb->ccb_h, 
3668                                                    xpt_links.stqe);
3669
3670                                 splx(ospl);
3671                                 continue;
3672                         } else {
3673                                 /*
3674                                  * Consume a high power slot while
3675                                  * this ccb runs.
3676                                  */
3677                                 num_highpower--;
3678                         }
3679                 }
3680                 devq->active_dev = device;
3681                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3682
3683                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3684                 splx(ospl);
3685
3686                 devq->send_openings--;
3687                 devq->send_active++;            
3688                 
3689                 if (device->ccbq.queue.entries > 0)
3690                         xpt_schedule_dev_sendq(bus, device);
3691
3692                 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3693                         /*
3694                          * The client wants to freeze the queue
3695                          * after this CCB is sent.
3696                          */
3697                         ospl = splcam();
3698                         device->qfrozen_cnt++;
3699                         splx(ospl);
3700                 }
3701                 
3702                 splx(s);
3703
3704                 /* In Target mode, the peripheral driver knows best... */
3705                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3706                         if ((device->inq_flags & SID_CmdQue) != 0
3707                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3708                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3709                         else
3710                                 /*
3711                                  * Clear this in case of a retried CCB that
3712                                  * failed due to a rejected tag.
3713                                  */
3714                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3715                 }
3716
3717                 /*
3718                  * Device queues can be shared among multiple sim instances
3719                  * that reside on different busses.  Use the SIM in the queue
3720                  * CCB's path, rather than the one in the bus that was passed
3721                  * into this function.
3722                  */
3723                 sim = work_ccb->ccb_h.path->bus->sim;
3724                 (*(sim->sim_action))(sim, work_ccb);
3725
3726                 ospl = splcam();
3727                 devq->active_dev = NULL;
3728                 splx(ospl);
3729                 /* Raise IPL for possible insertion and test at top of loop */
3730                 s = splsoftcam();
3731         }
3732         splx(s);
3733         s = splcam();
3734         devq->send_queue.qfrozen_cnt--;
3735         splx(s);
3736 }
3737
3738 /*
3739  * This function merges stuff from the slave ccb into the master ccb, while
3740  * keeping important fields in the master ccb constant.
3741  */
3742 void
3743 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3744 {
3745         /*
3746          * Pull fields that are valid for peripheral drivers to set
3747          * into the master CCB along with the CCB "payload".
3748          */
3749         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3750         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3751         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3752         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3753         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3754               sizeof(union ccb) - sizeof(struct ccb_hdr));
3755 }
3756
3757 void
3758 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3759 {
3760         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3761         ccb_h->pinfo.priority = priority;
3762         ccb_h->path = path;
3763         ccb_h->path_id = path->bus->path_id;
3764         if (path->target)
3765                 ccb_h->target_id = path->target->target_id;
3766         else
3767                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3768         if (path->device) {
3769                 ccb_h->target_lun = path->device->lun_id;
3770                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3771         } else {
3772                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3773         }
3774         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3775         ccb_h->flags = 0;
3776 }
3777
3778 /* Path manipulation functions */
3779 cam_status
3780 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3781                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3782 {
3783         struct     cam_path *path;
3784         cam_status status;
3785
3786         path = malloc(sizeof(*path), M_DEVBUF, M_INTWAIT);
3787         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3788         if (status != CAM_REQ_CMP) {
3789                 free(path, M_DEVBUF);
3790                 path = NULL;
3791         }
3792         *new_path_ptr = path;
3793         return (status);
3794 }
3795
3796 static cam_status
3797 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3798      &nbs