Style(9) cleanup to src/sys/vfs, stage 20/21: umapfs.
[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 1.14 2004/05/13 23:49:09 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         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
886 }
887
888 static void
889 probe_periph_init()
890 {
891 }
892
893
894 static void
895 xptdone(struct cam_periph *periph, union ccb *done_ccb)
896 {
897         /* Caller will release the CCB */
898         wakeup(&done_ccb->ccb_h.cbfcnp);
899 }
900
901 static int
902 xptopen(dev_t dev, int flags, int fmt, struct thread *td)
903 {
904         int unit;
905
906         unit = minor(dev) & 0xff;
907
908         /*
909          * Only allow read-write access.
910          */
911         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
912                 return(EPERM);
913
914         /*
915          * We don't allow nonblocking access.
916          */
917         if ((flags & O_NONBLOCK) != 0) {
918                 printf("xpt%d: can't do nonblocking access\n", unit);
919                 return(ENODEV);
920         }
921
922         /*
923          * We only have one transport layer right now.  If someone accesses
924          * us via something other than minor number 1, point out their
925          * mistake.
926          */
927         if (unit != 0) {
928                 printf("xptopen: got invalid xpt unit %d\n", unit);
929                 return(ENXIO);
930         }
931
932         /* Mark ourselves open */
933         xsoftc.flags |= XPT_FLAG_OPEN;
934         
935         return(0);
936 }
937
938 static int
939 xptclose(dev_t dev, int flag, int fmt, struct thread *td)
940 {
941         int unit;
942
943         unit = minor(dev) & 0xff;
944
945         /*
946          * We only have one transport layer right now.  If someone accesses
947          * us via something other than minor number 1, point out their
948          * mistake.
949          */
950         if (unit != 0) {
951                 printf("xptclose: got invalid xpt unit %d\n", unit);
952                 return(ENXIO);
953         }
954
955         /* Mark ourselves closed */
956         xsoftc.flags &= ~XPT_FLAG_OPEN;
957
958         return(0);
959 }
960
961 static int
962 xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
963 {
964         int unit, error;
965
966         error = 0;
967         unit = minor(dev) & 0xff;
968
969         /*
970          * We only have one transport layer right now.  If someone accesses
971          * us via something other than minor number 1, point out their
972          * mistake.
973          */
974         if (unit != 0) {
975                 printf("xptioctl: got invalid xpt unit %d\n", unit);
976                 return(ENXIO);
977         }
978
979         switch(cmd) {
980         /*
981          * For the transport layer CAMIOCOMMAND ioctl, we really only want
982          * to accept CCB types that don't quite make sense to send through a
983          * passthrough driver.
984          */
985         case CAMIOCOMMAND: {
986                 union ccb *ccb;
987                 union ccb *inccb;
988
989                 inccb = (union ccb *)addr;
990
991                 switch(inccb->ccb_h.func_code) {
992                 case XPT_SCAN_BUS:
993                 case XPT_RESET_BUS:
994                         if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
995                          || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
996                                 error = EINVAL;
997                                 break;
998                         }
999                         /* FALLTHROUGH */
1000                 case XPT_PATH_INQ:
1001                 case XPT_ENG_INQ:
1002                 case XPT_SCAN_LUN:
1003
1004                         ccb = xpt_alloc_ccb();
1005
1006                         /*
1007                          * Create a path using the bus, target, and lun the
1008                          * user passed in.
1009                          */
1010                         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1011                                             inccb->ccb_h.path_id,
1012                                             inccb->ccb_h.target_id,
1013                                             inccb->ccb_h.target_lun) !=
1014                                             CAM_REQ_CMP){
1015                                 error = EINVAL;
1016                                 xpt_free_ccb(ccb);
1017                                 break;
1018                         }
1019                         /* Ensure all of our fields are correct */
1020                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1021                                       inccb->ccb_h.pinfo.priority);
1022                         xpt_merge_ccb(ccb, inccb);
1023                         ccb->ccb_h.cbfcnp = xptdone;
1024                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1025                         bcopy(ccb, inccb, sizeof(union ccb));
1026                         xpt_free_path(ccb->ccb_h.path);
1027                         xpt_free_ccb(ccb);
1028                         break;
1029
1030                 case XPT_DEBUG: {
1031                         union ccb ccb;
1032
1033                         /*
1034                          * This is an immediate CCB, so it's okay to
1035                          * allocate it on the stack.
1036                          */
1037
1038                         /*
1039                          * Create a path using the bus, target, and lun the
1040                          * user passed in.
1041                          */
1042                         if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1043                                             inccb->ccb_h.path_id,
1044                                             inccb->ccb_h.target_id,
1045                                             inccb->ccb_h.target_lun) !=
1046                                             CAM_REQ_CMP){
1047                                 error = EINVAL;
1048                                 break;
1049                         }
1050                         /* Ensure all of our fields are correct */
1051                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1052                                       inccb->ccb_h.pinfo.priority);
1053                         xpt_merge_ccb(&ccb, inccb);
1054                         ccb.ccb_h.cbfcnp = xptdone;
1055                         xpt_action(&ccb);
1056                         bcopy(&ccb, inccb, sizeof(union ccb));
1057                         xpt_free_path(ccb.ccb_h.path);
1058                         break;
1059
1060                 }
1061                 case XPT_DEV_MATCH: {
1062                         struct cam_periph_map_info mapinfo;
1063                         struct cam_path *old_path;
1064
1065                         /*
1066                          * We can't deal with physical addresses for this
1067                          * type of transaction.
1068                          */
1069                         if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1070                                 error = EINVAL;
1071                                 break;
1072                         }
1073
1074                         /*
1075                          * Save this in case the caller had it set to
1076                          * something in particular.
1077                          */
1078                         old_path = inccb->ccb_h.path;
1079
1080                         /*
1081                          * We really don't need a path for the matching
1082                          * code.  The path is needed because of the
1083                          * debugging statements in xpt_action().  They
1084                          * assume that the CCB has a valid path.
1085                          */
1086                         inccb->ccb_h.path = xpt_periph->path;
1087
1088                         bzero(&mapinfo, sizeof(mapinfo));
1089
1090                         /*
1091                          * Map the pattern and match buffers into kernel
1092                          * virtual address space.
1093                          */
1094                         error = cam_periph_mapmem(inccb, &mapinfo);
1095
1096                         if (error) {
1097                                 inccb->ccb_h.path = old_path;
1098                                 break;
1099                         }
1100
1101                         /*
1102                          * This is an immediate CCB, we can send it on directly.
1103                          */
1104                         xpt_action(inccb);
1105
1106                         /*
1107                          * Map the buffers back into user space.
1108                          */
1109                         cam_periph_unmapmem(inccb, &mapinfo);
1110
1111                         inccb->ccb_h.path = old_path;
1112
1113                         error = 0;
1114                         break;
1115                 }
1116                 default:
1117                         error = ENOTSUP;
1118                         break;
1119                 }
1120                 break;
1121         }
1122         /*
1123          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1124          * with the periphal driver name and unit name filled in.  The other
1125          * fields don't really matter as input.  The passthrough driver name
1126          * ("pass"), and unit number are passed back in the ccb.  The current
1127          * device generation number, and the index into the device peripheral
1128          * driver list, and the status are also passed back.  Note that
1129          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1130          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
1131          * (or rather should be) impossible for the device peripheral driver
1132          * list to change since we look at the whole thing in one pass, and
1133          * we do it with splcam protection.
1134          * 
1135          */
1136         case CAMGETPASSTHRU: {
1137                 union ccb *ccb;
1138                 struct cam_periph *periph;
1139                 struct periph_driver **p_drv;
1140                 char   *name;
1141                 int unit;
1142                 int cur_generation;
1143                 int base_periph_found;
1144                 int splbreaknum;
1145                 int s;
1146
1147                 ccb = (union ccb *)addr;
1148                 unit = ccb->cgdl.unit_number;
1149                 name = ccb->cgdl.periph_name;
1150                 /*
1151                  * Every 100 devices, we want to drop our spl protection to
1152                  * give the software interrupt handler a chance to run.
1153                  * Most systems won't run into this check, but this should
1154                  * avoid starvation in the software interrupt handler in
1155                  * large systems.
1156                  */
1157                 splbreaknum = 100;
1158
1159                 ccb = (union ccb *)addr;
1160
1161                 base_periph_found = 0;
1162
1163                 /*
1164                  * Sanity check -- make sure we don't get a null peripheral
1165                  * driver name.
1166                  */
1167                 if (*ccb->cgdl.periph_name == '\0') {
1168                         error = EINVAL;
1169                         break;
1170                 }
1171
1172                 /* Keep the list from changing while we traverse it */
1173                 s = splcam();
1174 ptstartover:
1175                 cur_generation = xsoftc.generation;
1176
1177                 /* first find our driver in the list of drivers */
1178                 SET_FOREACH(p_drv, periphdriver_set) {
1179                         if (strcmp((*p_drv)->driver_name, name) == 0)
1180                                 break;
1181                 }
1182
1183                 if (*p_drv == NULL) {
1184                         splx(s);
1185                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1186                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1187                         *ccb->cgdl.periph_name = '\0';
1188                         ccb->cgdl.unit_number = 0;
1189                         error = ENOENT;
1190                         break;
1191                 }       
1192
1193                 /*
1194                  * Run through every peripheral instance of this driver
1195                  * and check to see whether it matches the unit passed
1196                  * in by the user.  If it does, get out of the loops and
1197                  * find the passthrough driver associated with that
1198                  * peripheral driver.
1199                  */
1200                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1201                      periph = TAILQ_NEXT(periph, unit_links)) {
1202
1203                         if (periph->unit_number == unit) {
1204                                 break;
1205                         } else if (--splbreaknum == 0) {
1206                                 splx(s);
1207                                 s = splcam();
1208                                 splbreaknum = 100;
1209                                 if (cur_generation != xsoftc.generation)
1210                                        goto ptstartover;
1211                         }
1212                 }
1213                 /*
1214                  * If we found the peripheral driver that the user passed
1215                  * in, go through all of the peripheral drivers for that
1216                  * particular device and look for a passthrough driver.
1217                  */
1218                 if (periph != NULL) {
1219                         struct cam_ed *device;
1220                         int i;
1221
1222                         base_periph_found = 1;
1223                         device = periph->path->device;
1224                         for (i = 0, periph = device->periphs.slh_first;
1225                              periph != NULL;
1226                              periph = periph->periph_links.sle_next, i++) {
1227                                 /*
1228                                  * Check to see whether we have a
1229                                  * passthrough device or not. 
1230                                  */
1231                                 if (strcmp(periph->periph_name, "pass") == 0) {
1232                                         /*
1233                                          * Fill in the getdevlist fields.
1234                                          */
1235                                         strcpy(ccb->cgdl.periph_name,
1236                                                periph->periph_name);
1237                                         ccb->cgdl.unit_number =
1238                                                 periph->unit_number;
1239                                         if (periph->periph_links.sle_next)
1240                                                 ccb->cgdl.status =
1241                                                         CAM_GDEVLIST_MORE_DEVS;
1242                                         else
1243                                                 ccb->cgdl.status =
1244                                                        CAM_GDEVLIST_LAST_DEVICE;
1245                                         ccb->cgdl.generation =
1246                                                 device->generation;
1247                                         ccb->cgdl.index = i;
1248                                         /*
1249                                          * Fill in some CCB header fields
1250                                          * that the user may want.
1251                                          */
1252                                         ccb->ccb_h.path_id =
1253                                                 periph->path->bus->path_id;
1254                                         ccb->ccb_h.target_id =
1255                                                 periph->path->target->target_id;
1256                                         ccb->ccb_h.target_lun =
1257                                                 periph->path->device->lun_id;
1258                                         ccb->ccb_h.status = CAM_REQ_CMP;
1259                                         break;
1260                                 }
1261                         }
1262                 }
1263
1264                 /*
1265                  * If the periph is null here, one of two things has
1266                  * happened.  The first possibility is that we couldn't
1267                  * find the unit number of the particular peripheral driver
1268                  * that the user is asking about.  e.g. the user asks for
1269                  * the passthrough driver for "da11".  We find the list of
1270                  * "da" peripherals all right, but there is no unit 11.
1271                  * The other possibility is that we went through the list
1272                  * of peripheral drivers attached to the device structure,
1273                  * but didn't find one with the name "pass".  Either way,
1274                  * we return ENOENT, since we couldn't find something.
1275                  */
1276                 if (periph == NULL) {
1277                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1278                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1279                         *ccb->cgdl.periph_name = '\0';
1280                         ccb->cgdl.unit_number = 0;
1281                         error = ENOENT;
1282                         /*
1283                          * It is unfortunate that this is even necessary,
1284                          * but there are many, many clueless users out there.
1285                          * If this is true, the user is looking for the
1286                          * passthrough driver, but doesn't have one in his
1287                          * kernel.
1288                          */
1289                         if (base_periph_found == 1) {
1290                                 printf("xptioctl: pass driver is not in the "
1291                                        "kernel\n");
1292                                 printf("xptioctl: put \"device pass0\" in "
1293                                        "your kernel config file\n");
1294                         }
1295                 }
1296                 splx(s);
1297                 break;
1298                 }
1299         default:
1300                 error = ENOTTY;
1301                 break;
1302         }
1303
1304         return(error);
1305 }
1306
1307 /* Functions accessed by the peripheral drivers */
1308 static void
1309 xpt_init(dummy)
1310         void *dummy;
1311 {
1312         struct cam_sim *xpt_sim;
1313         struct cam_path *path;
1314         struct cam_devq *devq;
1315         cam_status status;
1316
1317         TAILQ_INIT(&xpt_busses);
1318         TAILQ_INIT(&cam_bioq);
1319         TAILQ_INIT(&cam_netq);
1320         SLIST_INIT(&ccb_freeq);
1321         STAILQ_INIT(&highpowerq);
1322
1323         /*
1324          * The xpt layer is, itself, the equivelent of a SIM.
1325          * Allow 16 ccbs in the ccb pool for it.  This should
1326          * give decent parallelism when we probe busses and
1327          * perform other XPT functions.
1328          */
1329         devq = cam_simq_alloc(16);
1330         xpt_sim = cam_sim_alloc(xptaction,
1331                                 xptpoll,
1332                                 "xpt",
1333                                 /*softc*/NULL,
1334                                 /*unit*/0,
1335                                 /*max_dev_transactions*/0,
1336                                 /*max_tagged_dev_transactions*/0,
1337                                 devq);
1338         cam_simq_release(devq);
1339         xpt_max_ccbs = 16;
1340                                 
1341         xpt_bus_register(xpt_sim, /*bus #*/0);
1342
1343         /*
1344          * Looking at the XPT from the SIM layer, the XPT is
1345          * the equivelent of a peripheral driver.  Allocate
1346          * a peripheral driver entry for us.
1347          */
1348         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1349                                       CAM_TARGET_WILDCARD,
1350                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1351                 printf("xpt_init: xpt_create_path failed with status %#x,"
1352                        " failing attach\n", status);
1353                 return;
1354         }
1355
1356         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1357                          path, NULL, 0, NULL);
1358         xpt_free_path(path);
1359
1360         xpt_sim->softc = xpt_periph;
1361
1362         /*
1363          * Register a callback for when interrupts are enabled.
1364          */
1365         xpt_config_hook = malloc(sizeof(struct intr_config_hook),
1366                                   M_TEMP, M_INTWAIT | M_ZERO);
1367         xpt_config_hook->ich_func = xpt_config;
1368         if (config_intrhook_establish(xpt_config_hook) != 0) {
1369                 free (xpt_config_hook, M_TEMP);
1370                 printf("xpt_init: config_intrhook_establish failed "
1371                        "- failing attach\n");
1372         }
1373
1374         /* Install our software interrupt handlers */
1375         register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet");
1376         register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio");
1377 }
1378
1379 static cam_status
1380 xptregister(struct cam_periph *periph, void *arg)
1381 {
1382         if (periph == NULL) {
1383                 printf("xptregister: periph was NULL!!\n");
1384                 return(CAM_REQ_CMP_ERR);
1385         }
1386
1387         periph->softc = NULL;
1388
1389         xpt_periph = periph;
1390
1391         return(CAM_REQ_CMP);
1392 }
1393
1394 int32_t
1395 xpt_add_periph(struct cam_periph *periph)
1396 {
1397         struct cam_ed *device;
1398         int32_t  status;
1399         struct periph_list *periph_head;
1400
1401         device = periph->path->device;
1402
1403         periph_head = &device->periphs;
1404
1405         status = CAM_REQ_CMP;
1406
1407         if (device != NULL) {
1408                 int s;
1409
1410                 /*
1411                  * Make room for this peripheral
1412                  * so it will fit in the queue
1413                  * when it's scheduled to run
1414                  */
1415                 s = splsoftcam();
1416                 status = camq_resize(&device->drvq,
1417                                      device->drvq.array_size + 1);
1418
1419                 device->generation++;
1420
1421                 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1422
1423                 splx(s);
1424         }
1425
1426         xsoftc.generation++;
1427
1428         return (status);
1429 }
1430
1431 void
1432 xpt_remove_periph(struct cam_periph *periph)
1433 {
1434         struct cam_ed *device;
1435
1436         device = periph->path->device;
1437
1438         if (device != NULL) {
1439                 int s;
1440                 struct periph_list *periph_head;
1441
1442                 periph_head = &device->periphs;
1443                 
1444                 /* Release the slot for this peripheral */
1445                 s = splsoftcam();
1446                 camq_resize(&device->drvq, device->drvq.array_size - 1);
1447
1448                 device->generation++;
1449
1450                 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1451
1452                 splx(s);
1453         }
1454
1455         xsoftc.generation++;
1456
1457 }
1458
1459 void
1460 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1461 {
1462         int s;
1463         u_int mb;
1464         struct cam_path *path;
1465         struct ccb_trans_settings cts;
1466
1467         path = periph->path;
1468         /*
1469          * To ensure that this is printed in one piece,
1470          * mask out CAM interrupts.
1471          */
1472         s = splsoftcam();
1473         printf("%s%d at %s%d bus %d target %d lun %d\n",
1474                periph->periph_name, periph->unit_number,
1475                path->bus->sim->sim_name,
1476                path->bus->sim->unit_number,
1477                path->bus->sim->bus_id,
1478                path->target->target_id,
1479                path->device->lun_id);
1480         printf("%s%d: ", periph->periph_name, periph->unit_number);
1481         scsi_print_inquiry(&path->device->inq_data);
1482         if ((bootverbose)
1483          && (path->device->serial_num_len > 0)) {
1484                 /* Don't wrap the screen  - print only the first 60 chars */
1485                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1486                        periph->unit_number, path->device->serial_num);
1487         }
1488         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1489         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1490         cts.flags = CCB_TRANS_CURRENT_SETTINGS;
1491         xpt_action((union ccb*)&cts);
1492         if (cts.ccb_h.status == CAM_REQ_CMP) {
1493                 u_int speed;
1494                 u_int freq;
1495
1496                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1497                   && cts.sync_offset != 0) {
1498                         freq = scsi_calc_syncsrate(cts.sync_period);
1499                         speed = freq;
1500                 } else {
1501                         struct ccb_pathinq cpi;
1502
1503                         /* Ask the SIM for its base transfer speed */
1504                         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1505                         cpi.ccb_h.func_code = XPT_PATH_INQ;
1506                         xpt_action((union ccb *)&cpi);
1507
1508                         speed = cpi.base_transfer_speed;
1509                         freq = 0;
1510                 }
1511                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0)
1512                         speed *= (0x01 << cts.bus_width);
1513                 mb = speed / 1000;
1514                 if (mb > 0)
1515                         printf("%s%d: %d.%03dMB/s transfers",
1516                                periph->periph_name, periph->unit_number,
1517                                mb, speed % 1000);
1518                 else
1519                         printf("%s%d: %dKB/s transfers", periph->periph_name,
1520                                periph->unit_number, speed);
1521                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1522                  && cts.sync_offset != 0) {
1523                         printf(" (%d.%03dMHz, offset %d", freq / 1000,
1524                                freq % 1000, cts.sync_offset);
1525                 }
1526                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0
1527                  && cts.bus_width > 0) {
1528                         if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1529                          && cts.sync_offset != 0) {
1530                                 printf(", ");
1531                         } else {
1532                                 printf(" (");
1533                         }
1534                         printf("%dbit)", 8 * (0x01 << cts.bus_width));
1535                 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1536                         && cts.sync_offset != 0) {
1537                         printf(")");
1538                 }
1539
1540                 if (path->device->inq_flags & SID_CmdQue
1541                  || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1542                         printf(", Tagged Queueing Enabled");
1543                 }
1544
1545                 printf("\n");
1546         } else if (path->device->inq_flags & SID_CmdQue
1547                 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1548                 printf("%s%d: Tagged Queueing Enabled\n",
1549                        periph->periph_name, periph->unit_number);
1550         }
1551
1552         /*
1553          * We only want to print the caller's announce string if they've
1554          * passed one in..
1555          */
1556         if (announce_string != NULL)
1557                 printf("%s%d: %s\n", periph->periph_name,
1558                        periph->unit_number, announce_string);
1559         splx(s);
1560 }
1561
1562
1563 static dev_match_ret
1564 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns,
1565             struct cam_eb *bus)
1566 {
1567         dev_match_ret retval;
1568         int i;
1569
1570         retval = DM_RET_NONE;
1571
1572         /*
1573          * If we aren't given something to match against, that's an error.
1574          */
1575         if (bus == NULL)
1576                 return(DM_RET_ERROR);
1577
1578         /*
1579          * If there are no match entries, then this bus matches no
1580          * matter what.
1581          */
1582         if ((patterns == NULL) || (num_patterns == 0))
1583                 return(DM_RET_DESCEND | DM_RET_COPY);
1584
1585         for (i = 0; i < num_patterns; i++) {
1586                 struct bus_match_pattern *cur_pattern;
1587
1588                 /*
1589                  * If the pattern in question isn't for a bus node, we
1590                  * aren't interested.  However, we do indicate to the
1591                  * calling routine that we should continue descending the
1592                  * tree, since the user wants to match against lower-level
1593                  * EDT elements.
1594                  */
1595                 if (patterns[i].type != DEV_MATCH_BUS) {
1596                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1597                                 retval |= DM_RET_DESCEND;
1598                         continue;
1599                 }
1600
1601                 cur_pattern = &patterns[i].pattern.bus_pattern;
1602
1603                 /*
1604                  * If they want to match any bus node, we give them any
1605                  * device node.
1606                  */
1607                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1608                         /* set the copy flag */
1609                         retval |= DM_RET_COPY;
1610
1611                         /*
1612                          * If we've already decided on an action, go ahead
1613                          * and return.
1614                          */
1615                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1616                                 return(retval);
1617                 }
1618
1619                 /*
1620                  * Not sure why someone would do this...
1621                  */
1622                 if (cur_pattern->flags == BUS_MATCH_NONE)
1623                         continue;
1624
1625                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1626                  && (cur_pattern->path_id != bus->path_id))
1627                         continue;
1628
1629                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1630                  && (cur_pattern->bus_id != bus->sim->bus_id))
1631                         continue;
1632
1633                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1634                  && (cur_pattern->unit_number != bus->sim->unit_number))
1635                         continue;
1636
1637                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1638                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1639                              DEV_IDLEN) != 0))
1640                         continue;
1641
1642                 /*
1643                  * If we get to this point, the user definitely wants 
1644                  * information on this bus.  So tell the caller to copy the
1645                  * data out.
1646                  */
1647                 retval |= DM_RET_COPY;
1648
1649                 /*
1650                  * If the return action has been set to descend, then we
1651                  * know that we've already seen a non-bus matching
1652                  * expression, therefore we need to further descend the tree.
1653                  * This won't change by continuing around the loop, so we
1654                  * go ahead and return.  If we haven't seen a non-bus
1655                  * matching expression, we keep going around the loop until
1656                  * we exhaust the matching expressions.  We'll set the stop
1657                  * flag once we fall out of the loop.
1658                  */
1659                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1660                         return(retval);
1661         }
1662
1663         /*
1664          * If the return action hasn't been set to descend yet, that means
1665          * we haven't seen anything other than bus matching patterns.  So
1666          * tell the caller to stop descending the tree -- the user doesn't
1667          * want to match against lower level tree elements.
1668          */
1669         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1670                 retval |= DM_RET_STOP;
1671
1672         return(retval);
1673 }
1674
1675 static dev_match_ret
1676 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns,
1677                struct cam_ed *device)
1678 {
1679         dev_match_ret retval;
1680         int i;
1681
1682         retval = DM_RET_NONE;
1683
1684         /*
1685          * If we aren't given something to match against, that's an error.
1686          */
1687         if (device == NULL)
1688                 return(DM_RET_ERROR);
1689
1690         /*
1691          * If there are no match entries, then this device matches no
1692          * matter what.
1693          */
1694         if ((patterns == NULL) || (patterns == 0))
1695                 return(DM_RET_DESCEND | DM_RET_COPY);
1696
1697         for (i = 0; i < num_patterns; i++) {
1698                 struct device_match_pattern *cur_pattern;
1699
1700                 /*
1701                  * If the pattern in question isn't for a device node, we
1702                  * aren't interested.
1703                  */
1704                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1705                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1706                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1707                                 retval |= DM_RET_DESCEND;
1708                         continue;
1709                 }
1710
1711                 cur_pattern = &patterns[i].pattern.device_pattern;
1712
1713                 /*
1714                  * If they want to match any device node, we give them any
1715                  * device node.
1716                  */
1717                 if (cur_pattern->flags == DEV_MATCH_ANY) {
1718                         /* set the copy flag */
1719                         retval |= DM_RET_COPY;
1720
1721                         
1722                         /*
1723                          * If we've already decided on an action, go ahead
1724                          * and return.
1725                          */
1726                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1727                                 return(retval);
1728                 }
1729
1730                 /*
1731                  * Not sure why someone would do this...
1732                  */
1733                 if (cur_pattern->flags == DEV_MATCH_NONE)
1734                         continue;
1735
1736                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1737                  && (cur_pattern->path_id != device->target->bus->path_id))
1738                         continue;
1739
1740                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1741                  && (cur_pattern->target_id != device->target->target_id))
1742                         continue;
1743
1744                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1745                  && (cur_pattern->target_lun != device->lun_id))
1746                         continue;
1747
1748                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1749                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1750                                     (caddr_t)&cur_pattern->inq_pat,
1751                                     1, sizeof(cur_pattern->inq_pat),
1752                                     scsi_static_inquiry_match) == NULL))
1753                         continue;
1754
1755                 /*
1756                  * If we get to this point, the user definitely wants 
1757                  * information on this device.  So tell the caller to copy
1758                  * the data out.
1759                  */
1760                 retval |= DM_RET_COPY;
1761
1762                 /*
1763                  * If the return action has been set to descend, then we
1764                  * know that we've already seen a peripheral matching
1765                  * expression, therefore we need to further descend the tree.
1766                  * This won't change by continuing around the loop, so we
1767                  * go ahead and return.  If we haven't seen a peripheral
1768                  * matching expression, we keep going around the loop until
1769                  * we exhaust the matching expressions.  We'll set the stop
1770                  * flag once we fall out of the loop.
1771                  */
1772                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1773                         return(retval);
1774         }
1775
1776         /*
1777          * If the return action hasn't been set to descend yet, that means
1778          * we haven't seen any peripheral matching patterns.  So tell the
1779          * caller to stop descending the tree -- the user doesn't want to
1780          * match against lower level tree elements.
1781          */
1782         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1783                 retval |= DM_RET_STOP;
1784
1785         return(retval);
1786 }
1787
1788 /*
1789  * Match a single peripheral against any number of match patterns.
1790  */
1791 static dev_match_ret
1792 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns,
1793                struct cam_periph *periph)
1794 {
1795         dev_match_ret retval;
1796         int i;
1797
1798         /*
1799          * If we aren't given something to match against, that's an error.
1800          */
1801         if (periph == NULL)
1802                 return(DM_RET_ERROR);
1803
1804         /*
1805          * If there are no match entries, then this peripheral matches no
1806          * matter what.
1807          */
1808         if ((patterns == NULL) || (num_patterns == 0))
1809                 return(DM_RET_STOP | DM_RET_COPY);
1810
1811         /*
1812          * There aren't any nodes below a peripheral node, so there's no
1813          * reason to descend the tree any further.
1814          */
1815         retval = DM_RET_STOP;
1816
1817         for (i = 0; i < num_patterns; i++) {
1818                 struct periph_match_pattern *cur_pattern;
1819
1820                 /*
1821                  * If the pattern in question isn't for a peripheral, we
1822                  * aren't interested.
1823                  */
1824                 if (patterns[i].type != DEV_MATCH_PERIPH)
1825                         continue;
1826
1827                 cur_pattern = &patterns[i].pattern.periph_pattern;
1828
1829                 /*
1830                  * If they want to match on anything, then we will do so.
1831                  */
1832                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1833                         /* set the copy flag */
1834                         retval |= DM_RET_COPY;
1835
1836                         /*
1837                          * We've already set the return action to stop,
1838                          * since there are no nodes below peripherals in
1839                          * the tree.
1840                          */
1841                         return(retval);
1842                 }
1843
1844                 /*
1845                  * Not sure why someone would do this...
1846                  */
1847                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1848                         continue;
1849
1850                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1851                  && (cur_pattern->path_id != periph->path->bus->path_id))
1852                         continue;
1853
1854                 /*
1855                  * For the target and lun id's, we have to make sure the
1856                  * target and lun pointers aren't NULL.  The xpt peripheral
1857                  * has a wildcard target and device.
1858                  */
1859                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1860                  && ((periph->path->target == NULL)
1861                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1862                         continue;
1863
1864                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1865                  && ((periph->path->device == NULL)
1866                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1867                         continue;
1868
1869                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1870                  && (cur_pattern->unit_number != periph->unit_number))
1871                         continue;
1872
1873                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1874                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1875                              DEV_IDLEN) != 0))
1876                         continue;
1877
1878                 /*
1879                  * If we get to this point, the user definitely wants 
1880                  * information on this peripheral.  So tell the caller to
1881                  * copy the data out.
1882                  */
1883                 retval |= DM_RET_COPY;
1884
1885                 /*
1886                  * The return action has already been set to stop, since
1887                  * peripherals don't have any nodes below them in the EDT.
1888                  */
1889                 return(retval);
1890         }
1891
1892         /*
1893          * If we get to this point, the peripheral that was passed in
1894          * doesn't match any of the patterns.
1895          */
1896         return(retval);
1897 }
1898
1899 static int
1900 xptedtbusfunc(struct cam_eb *bus, void *arg)
1901 {
1902         struct ccb_dev_match *cdm;
1903         dev_match_ret retval;
1904
1905         cdm = (struct ccb_dev_match *)arg;
1906
1907         /*
1908          * If our position is for something deeper in the tree, that means
1909          * that we've already seen this node.  So, we keep going down.
1910          */
1911         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1912          && (cdm->pos.cookie.bus == bus)
1913          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1914          && (cdm->pos.cookie.target != NULL))
1915                 retval = DM_RET_DESCEND;
1916         else
1917                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1918
1919         /*
1920          * If we got an error, bail out of the search.
1921          */
1922         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1923                 cdm->status = CAM_DEV_MATCH_ERROR;
1924                 return(0);
1925         }
1926
1927         /*
1928          * If the copy flag is set, copy this bus out.
1929          */
1930         if (retval & DM_RET_COPY) {
1931                 int spaceleft, j;
1932
1933                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1934                         sizeof(struct dev_match_result));
1935
1936                 /*
1937                  * If we don't have enough space to put in another
1938                  * match result, save our position and tell the
1939                  * user there are more devices to check.
1940                  */
1941                 if (spaceleft < sizeof(struct dev_match_result)) {
1942                         bzero(&cdm->pos, sizeof(cdm->pos));
1943                         cdm->pos.position_type = 
1944                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1945
1946                         cdm->pos.cookie.bus = bus;
1947                         cdm->pos.generations[CAM_BUS_GENERATION]=
1948                                 bus_generation;
1949                         cdm->status = CAM_DEV_MATCH_MORE;
1950                         return(0);
1951                 }
1952                 j = cdm->num_matches;
1953                 cdm->num_matches++;
1954                 cdm->matches[j].type = DEV_MATCH_BUS;
1955                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1956                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1957                 cdm->matches[j].result.bus_result.unit_number =
1958                         bus->sim->unit_number;
1959                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1960                         bus->sim->sim_name, DEV_IDLEN);
1961         }
1962
1963         /*
1964          * If the user is only interested in busses, there's no
1965          * reason to descend to the next level in the tree.
1966          */
1967         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1968                 return(1);
1969
1970         /*
1971          * If there is a target generation recorded, check it to
1972          * make sure the target list hasn't changed.
1973          */
1974         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1975          && (bus == cdm->pos.cookie.bus)
1976          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1977          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
1978          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
1979              bus->generation)) {
1980                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1981                 return(0);
1982         }
1983
1984         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1985          && (cdm->pos.cookie.bus == bus)
1986          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1987          && (cdm->pos.cookie.target != NULL))
1988                 return(xpttargettraverse(bus,
1989                                         (struct cam_et *)cdm->pos.cookie.target,
1990                                          xptedttargetfunc, arg));
1991         else
1992                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
1993 }
1994
1995 static int
1996 xptedttargetfunc(struct cam_et *target, void *arg)
1997 {
1998         struct ccb_dev_match *cdm;
1999
2000         cdm = (struct ccb_dev_match *)arg;
2001
2002         /*
2003          * If there is a device list generation recorded, check it to
2004          * make sure the device list hasn't changed.
2005          */
2006         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2007          && (cdm->pos.cookie.bus == target->bus)
2008          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2009          && (cdm->pos.cookie.target == target)
2010          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2011          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2012          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2013              target->generation)) {
2014                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2015                 return(0);
2016         }
2017
2018         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2019          && (cdm->pos.cookie.bus == target->bus)
2020          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2021          && (cdm->pos.cookie.target == target)
2022          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2023          && (cdm->pos.cookie.device != NULL))
2024                 return(xptdevicetraverse(target,
2025                                         (struct cam_ed *)cdm->pos.cookie.device,
2026                                          xptedtdevicefunc, arg));
2027         else
2028                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2029 }
2030
2031 static int
2032 xptedtdevicefunc(struct cam_ed *device, void *arg)
2033 {
2034
2035         struct ccb_dev_match *cdm;
2036         dev_match_ret retval;
2037
2038         cdm = (struct ccb_dev_match *)arg;
2039
2040         /*
2041          * If our position is for something deeper in the tree, that means
2042          * that we've already seen this node.  So, we keep going down.
2043          */
2044         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2045          && (cdm->pos.cookie.device == device)
2046          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2047          && (cdm->pos.cookie.periph != NULL))
2048                 retval = DM_RET_DESCEND;
2049         else
2050                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2051                                         device);
2052
2053         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2054                 cdm->status = CAM_DEV_MATCH_ERROR;
2055                 return(0);
2056         }
2057
2058         /*
2059          * If the copy flag is set, copy this device out.
2060          */
2061         if (retval & DM_RET_COPY) {
2062                 int spaceleft, j;
2063
2064                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2065                         sizeof(struct dev_match_result));
2066
2067                 /*
2068                  * If we don't have enough space to put in another
2069                  * match result, save our position and tell the
2070                  * user there are more devices to check.
2071                  */
2072                 if (spaceleft < sizeof(struct dev_match_result)) {
2073                         bzero(&cdm->pos, sizeof(cdm->pos));
2074                         cdm->pos.position_type = 
2075                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2076                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2077
2078                         cdm->pos.cookie.bus = device->target->bus;
2079                         cdm->pos.generations[CAM_BUS_GENERATION]=
2080                                 bus_generation;
2081                         cdm->pos.cookie.target = device->target;
2082                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2083                                 device->target->bus->generation;
2084                         cdm->pos.cookie.device = device;
2085                         cdm->pos.generations[CAM_DEV_GENERATION] = 
2086                                 device->target->generation;
2087                         cdm->status = CAM_DEV_MATCH_MORE;
2088                         return(0);
2089                 }
2090                 j = cdm->num_matches;
2091                 cdm->num_matches++;
2092                 cdm->matches[j].type = DEV_MATCH_DEVICE;
2093                 cdm->matches[j].result.device_result.path_id =
2094                         device->target->bus->path_id;
2095                 cdm->matches[j].result.device_result.target_id =
2096                         device->target->target_id;
2097                 cdm->matches[j].result.device_result.target_lun =
2098                         device->lun_id;
2099                 bcopy(&device->inq_data,
2100                       &cdm->matches[j].result.device_result.inq_data,
2101                       sizeof(struct scsi_inquiry_data));
2102
2103                 /* Let the user know whether this device is unconfigured */
2104                 if (device->flags & CAM_DEV_UNCONFIGURED)
2105                         cdm->matches[j].result.device_result.flags =
2106                                 DEV_RESULT_UNCONFIGURED;
2107                 else
2108                         cdm->matches[j].result.device_result.flags =
2109                                 DEV_RESULT_NOFLAG;
2110         }
2111
2112         /*
2113          * If the user isn't interested in peripherals, don't descend
2114          * the tree any further.
2115          */
2116         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2117                 return(1);
2118
2119         /*
2120          * If there is a peripheral list generation recorded, make sure
2121          * it hasn't changed.
2122          */
2123         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2124          && (device->target->bus == cdm->pos.cookie.bus)
2125          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2126          && (device->target == cdm->pos.cookie.target)
2127          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2128          && (device == cdm->pos.cookie.device)
2129          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2130          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2131          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2132              device->generation)){
2133                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2134                 return(0);
2135         }
2136
2137         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2138          && (cdm->pos.cookie.bus == device->target->bus)
2139          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2140          && (cdm->pos.cookie.target == device->target)
2141          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2142          && (cdm->pos.cookie.device == device)
2143          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2144          && (cdm->pos.cookie.periph != NULL))
2145                 return(xptperiphtraverse(device,
2146                                 (struct cam_periph *)cdm->pos.cookie.periph,
2147                                 xptedtperiphfunc, arg));
2148         else
2149                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2150 }
2151
2152 static int
2153 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2154 {
2155         struct ccb_dev_match *cdm;
2156         dev_match_ret retval;
2157
2158         cdm = (struct ccb_dev_match *)arg;
2159
2160         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2161
2162         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2163                 cdm->status = CAM_DEV_MATCH_ERROR;
2164                 return(0);
2165         }
2166
2167         /*
2168          * If the copy flag is set, copy this peripheral out.
2169          */
2170         if (retval & DM_RET_COPY) {
2171                 int spaceleft, j;
2172
2173                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2174                         sizeof(struct dev_match_result));
2175
2176                 /*
2177                  * If we don't have enough space to put in another
2178                  * match result, save our position and tell the
2179                  * user there are more devices to check.
2180                  */
2181                 if (spaceleft < sizeof(struct dev_match_result)) {
2182                         bzero(&cdm->pos, sizeof(cdm->pos));
2183                         cdm->pos.position_type = 
2184                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2185                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2186                                 CAM_DEV_POS_PERIPH;
2187
2188                         cdm->pos.cookie.bus = periph->path->bus;
2189                         cdm->pos.generations[CAM_BUS_GENERATION]=
2190                                 bus_generation;
2191                         cdm->pos.cookie.target = periph->path->target;
2192                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2193                                 periph->path->bus->generation;
2194                         cdm->pos.cookie.device = periph->path->device;
2195                         cdm->pos.generations[CAM_DEV_GENERATION] = 
2196                                 periph->path->target->generation;
2197                         cdm->pos.cookie.periph = periph;
2198                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2199                                 periph->path->device->generation;
2200                         cdm->status = CAM_DEV_MATCH_MORE;
2201                         return(0);
2202                 }
2203
2204                 j = cdm->num_matches;
2205                 cdm->num_matches++;
2206                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2207                 cdm->matches[j].result.periph_result.path_id =
2208                         periph->path->bus->path_id;
2209                 cdm->matches[j].result.periph_result.target_id =
2210                         periph->path->target->target_id;
2211                 cdm->matches[j].result.periph_result.target_lun =
2212                         periph->path->device->lun_id;
2213                 cdm->matches[j].result.periph_result.unit_number =
2214                         periph->unit_number;
2215                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2216                         periph->periph_name, DEV_IDLEN);
2217         }
2218
2219         return(1);
2220 }
2221
2222 static int
2223 xptedtmatch(struct ccb_dev_match *cdm)
2224 {
2225         int ret;
2226
2227         cdm->num_matches = 0;
2228
2229         /*
2230          * Check the bus list generation.  If it has changed, the user
2231          * needs to reset everything and start over.
2232          */
2233         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2234          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2235          && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2236                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2237                 return(0);
2238         }
2239
2240         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2241          && (cdm->pos.cookie.bus != NULL))
2242                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2243                                      xptedtbusfunc, cdm);
2244         else
2245                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2246
2247         /*
2248          * If we get back 0, that means that we had to stop before fully
2249          * traversing the EDT.  It also means that one of the subroutines
2250          * has set the status field to the proper value.  If we get back 1,
2251          * we've fully traversed the EDT and copied out any matching entries.
2252          */
2253         if (ret == 1)
2254                 cdm->status = CAM_DEV_MATCH_LAST;
2255
2256         return(ret);
2257 }
2258
2259 static int
2260 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2261 {
2262         struct ccb_dev_match *cdm;
2263
2264         cdm = (struct ccb_dev_match *)arg;
2265
2266         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2267          && (cdm->pos.cookie.pdrv == pdrv)
2268          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2269          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2270          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2271              (*pdrv)->generation)) {
2272                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2273                 return(0);
2274         }
2275
2276         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2277          && (cdm->pos.cookie.pdrv == pdrv)
2278          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2279          && (cdm->pos.cookie.periph != NULL))
2280                 return(xptpdperiphtraverse(pdrv,
2281                                 (struct cam_periph *)cdm->pos.cookie.periph,
2282                                 xptplistperiphfunc, arg));
2283         else
2284                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2285 }
2286
2287 static int
2288 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2289 {
2290         struct ccb_dev_match *cdm;
2291         dev_match_ret retval;
2292
2293         cdm = (struct ccb_dev_match *)arg;
2294
2295         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2296
2297         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2298                 cdm->status = CAM_DEV_MATCH_ERROR;
2299                 return(0);
2300         }
2301
2302         /*
2303          * If the copy flag is set, copy this peripheral out.
2304          */
2305         if (retval & DM_RET_COPY) {
2306                 int spaceleft, j;
2307
2308                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2309                         sizeof(struct dev_match_result));
2310
2311                 /*
2312                  * If we don't have enough space to put in another
2313                  * match result, save our position and tell the
2314                  * user there are more devices to check.
2315                  */
2316                 if (spaceleft < sizeof(struct dev_match_result)) {
2317                         struct periph_driver **pdrv;
2318
2319                         pdrv = NULL;
2320                         bzero(&cdm->pos, sizeof(cdm->pos));
2321                         cdm->pos.position_type = 
2322                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2323                                 CAM_DEV_POS_PERIPH;
2324
2325                         /*
2326                          * This may look a bit non-sensical, but it is
2327                          * actually quite logical.  There are very few
2328                          * peripheral drivers, and bloating every peripheral
2329                          * structure with a pointer back to its parent
2330                          * peripheral driver linker set entry would cost
2331                          * more in the long run than doing this quick lookup.
2332                          */
2333                         SET_FOREACH(pdrv, periphdriver_set) {
2334                                 if (strcmp((*pdrv)->driver_name,
2335                                     periph->periph_name) == 0)
2336                                         break;
2337                         }
2338
2339                         if (pdrv == NULL) {
2340                                 cdm->status = CAM_DEV_MATCH_ERROR;
2341                                 return(0);
2342                         }
2343
2344                         cdm->pos.cookie.pdrv = pdrv;
2345                         /*
2346                          * The periph generation slot does double duty, as
2347                          * does the periph pointer slot.  They are used for
2348                          * both edt and pdrv lookups and positioning.
2349                          */
2350                         cdm->pos.cookie.periph = periph;
2351                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2352                                 (*pdrv)->generation;
2353                         cdm->status = CAM_DEV_MATCH_MORE;
2354                         return(0);
2355                 }
2356
2357                 j = cdm->num_matches;
2358                 cdm->num_matches++;
2359                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2360                 cdm->matches[j].result.periph_result.path_id =
2361                         periph->path->bus->path_id;
2362
2363                 /*
2364                  * The transport layer peripheral doesn't have a target or
2365                  * lun.
2366                  */
2367                 if (periph->path->target)
2368                         cdm->matches[j].result.periph_result.target_id =
2369                                 periph->path->target->target_id;
2370                 else
2371                         cdm->matches[j].result.periph_result.target_id = -1;
2372
2373                 if (periph->path->device)
2374                         cdm->matches[j].result.periph_result.target_lun =
2375                                 periph->path->device->lun_id;
2376                 else
2377                         cdm->matches[j].result.periph_result.target_lun = -1;
2378
2379                 cdm->matches[j].result.periph_result.unit_number =
2380                         periph->unit_number;
2381                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2382                         periph->periph_name, DEV_IDLEN);
2383         }
2384
2385         return(1);
2386 }
2387
2388 static int
2389 xptperiphlistmatch(struct ccb_dev_match *cdm)
2390 {
2391         int ret;
2392
2393         cdm->num_matches = 0;
2394
2395         /*
2396          * At this point in the edt traversal function, we check the bus
2397          * list generation to make sure that no busses have been added or
2398          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2399          * For the peripheral driver list traversal function, however, we
2400          * don't have to worry about new peripheral driver types coming or
2401          * going; they're in a linker set, and therefore can't change
2402          * without a recompile.
2403          */
2404
2405         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2406          && (cdm->pos.cookie.pdrv != NULL))
2407                 ret = xptpdrvtraverse(
2408                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2409                                 xptplistpdrvfunc, cdm);
2410         else
2411                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2412
2413         /*
2414          * If we get back 0, that means that we had to stop before fully
2415          * traversing the peripheral driver tree.  It also means that one of
2416          * the subroutines has set the status field to the proper value.  If
2417          * we get back 1, we've fully traversed the EDT and copied out any
2418          * matching entries.
2419          */
2420         if (ret == 1)
2421                 cdm->status = CAM_DEV_MATCH_LAST;
2422
2423         return(ret);
2424 }
2425
2426 static int
2427 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2428 {
2429         struct cam_eb *bus, *next_bus;
2430         int retval;
2431
2432         retval = 1;
2433
2434         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2435              bus != NULL;
2436              bus = next_bus) {
2437                 next_bus = TAILQ_NEXT(bus, links);
2438
2439                 retval = tr_func(bus, arg);
2440                 if (retval == 0)
2441                         return(retval);
2442         }
2443
2444         return(retval);
2445 }
2446
2447 static int
2448 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2449                   xpt_targetfunc_t *tr_func, void *arg)
2450 {
2451         struct cam_et *target, *next_target;
2452         int retval;
2453
2454         retval = 1;
2455         for (target = (start_target ? start_target :
2456                        TAILQ_FIRST(&bus->et_entries));
2457              target != NULL; target = next_target) {
2458
2459                 next_target = TAILQ_NEXT(target, links);
2460
2461                 retval = tr_func(target, arg);
2462
2463                 if (retval == 0)
2464                         return(retval);
2465         }
2466
2467         return(retval);
2468 }
2469
2470 static int
2471 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2472                   xpt_devicefunc_t *tr_func, void *arg)
2473 {
2474         struct cam_ed *device, *next_device;
2475         int retval;
2476
2477         retval = 1;
2478         for (device = (start_device ? start_device :
2479                        TAILQ_FIRST(&target->ed_entries));
2480              device != NULL;
2481              device = next_device) {
2482
2483                 next_device = TAILQ_NEXT(device, links);
2484
2485                 retval = tr_func(device, arg);
2486
2487                 if (retval == 0)
2488                         return(retval);
2489         }
2490
2491         return(retval);
2492 }
2493
2494 static int
2495 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2496                   xpt_periphfunc_t *tr_func, void *arg)
2497 {
2498         struct cam_periph *periph, *next_periph;
2499         int retval;
2500
2501         retval = 1;
2502
2503         for (periph = (start_periph ? start_periph :
2504                        SLIST_FIRST(&device->periphs));
2505              periph != NULL;
2506              periph = next_periph) {
2507
2508                 next_periph = SLIST_NEXT(periph, periph_links);
2509
2510                 retval = tr_func(periph, arg);
2511                 if (retval == 0)
2512                         return(retval);
2513         }
2514
2515         return(retval);
2516 }
2517
2518 static int
2519 xptpdrvtraverse(struct periph_driver **start_pdrv,
2520                 xpt_pdrvfunc_t *tr_func, void *arg)
2521 {
2522         struct periph_driver **pdrv;
2523         int retval;
2524
2525         retval = 1;
2526
2527         /*
2528          * We don't traverse the peripheral driver list like we do the
2529          * other lists, because it is a linker set, and therefore cannot be
2530          * changed during runtime.  If the peripheral driver list is ever
2531          * re-done to be something other than a linker set (i.e. it can
2532          * change while the system is running), the list traversal should
2533          * be modified to work like the other traversal functions.
2534          */
2535         SET_FOREACH(pdrv, periphdriver_set) {
2536                 if (start_pdrv == NULL || start_pdrv == pdrv) {
2537                         retval = tr_func(pdrv, arg);
2538                         if (retval == 0)
2539                                 return(retval);
2540                         start_pdrv = NULL; /* traverse remainder */
2541                 }
2542         }
2543         return(retval);
2544 }
2545
2546 static int
2547 xptpdperiphtraverse(struct periph_driver **pdrv,
2548                     struct cam_periph *start_periph,
2549                     xpt_periphfunc_t *tr_func, void *arg)
2550 {
2551         struct cam_periph *periph, *next_periph;
2552         int retval;
2553
2554         retval = 1;
2555
2556         for (periph = (start_periph ? start_periph :
2557              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2558              periph = next_periph) {
2559
2560                 next_periph = TAILQ_NEXT(periph, unit_links);
2561
2562                 retval = tr_func(periph, arg);
2563                 if (retval == 0)
2564                         return(retval);
2565         }
2566         return(retval);
2567 }
2568
2569 static int
2570 xptdefbusfunc(struct cam_eb *bus, void *arg)
2571 {
2572         struct xpt_traverse_config *tr_config;
2573
2574         tr_config = (struct xpt_traverse_config *)arg;
2575
2576         if (tr_config->depth == XPT_DEPTH_BUS) {
2577                 xpt_busfunc_t *tr_func;
2578
2579                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2580
2581                 return(tr_func(bus, tr_config->tr_arg));
2582         } else
2583                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2584 }
2585
2586 static int
2587 xptdeftargetfunc(struct cam_et *target, void *arg)
2588 {
2589         struct xpt_traverse_config *tr_config;
2590
2591         tr_config = (struct xpt_traverse_config *)arg;
2592
2593         if (tr_config->depth == XPT_DEPTH_TARGET) {
2594                 xpt_targetfunc_t *tr_func;
2595
2596                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2597
2598                 return(tr_func(target, tr_config->tr_arg));
2599         } else
2600                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2601 }
2602
2603 static int
2604 xptdefdevicefunc(struct cam_ed *device, void *arg)
2605 {
2606         struct xpt_traverse_config *tr_config;
2607
2608         tr_config = (struct xpt_traverse_config *)arg;
2609
2610         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2611                 xpt_devicefunc_t *tr_func;
2612
2613                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2614
2615                 return(tr_func(device, tr_config->tr_arg));
2616         } else
2617                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2618 }
2619
2620 static int
2621 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2622 {
2623         struct xpt_traverse_config *tr_config;
2624         xpt_periphfunc_t *tr_func;
2625
2626         tr_config = (struct xpt_traverse_config *)arg;
2627
2628         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2629
2630         /*
2631          * Unlike the other default functions, we don't check for depth
2632          * here.  The peripheral driver level is the last level in the EDT,
2633          * so if we're here, we should execute the function in question.
2634          */
2635         return(tr_func(periph, tr_config->tr_arg));
2636 }
2637
2638 /*
2639  * Execute the given function for every bus in the EDT.
2640  */
2641 static int
2642 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2643 {
2644         struct xpt_traverse_config tr_config;
2645
2646         tr_config.depth = XPT_DEPTH_BUS;
2647         tr_config.tr_func = tr_func;
2648         tr_config.tr_arg = arg;
2649
2650         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2651 }
2652
2653 #ifdef notusedyet
2654 /*
2655  * Execute the given function for every target in the EDT.
2656  */
2657 static int
2658 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2659 {
2660         struct xpt_traverse_config tr_config;
2661
2662         tr_config.depth = XPT_DEPTH_TARGET;
2663         tr_config.tr_func = tr_func;
2664         tr_config.tr_arg = arg;
2665
2666         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2667 }
2668 #endif /* notusedyet */
2669
2670 /*
2671  * Execute the given function for every device in the EDT.
2672  */
2673 static int
2674 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2675 {
2676         struct xpt_traverse_config tr_config;
2677
2678         tr_config.depth = XPT_DEPTH_DEVICE;
2679         tr_config.tr_func = tr_func;
2680         tr_config.tr_arg = arg;
2681
2682         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2683 }
2684
2685 #ifdef notusedyet
2686 /*
2687  * Execute the given function for every peripheral in the EDT.
2688  */
2689 static int
2690 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2691 {
2692         struct xpt_traverse_config tr_config;
2693
2694         tr_config.depth = XPT_DEPTH_PERIPH;
2695         tr_config.tr_func = tr_func;
2696         tr_config.tr_arg = arg;
2697
2698         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2699 }
2700 #endif /* notusedyet */
2701
2702 static int
2703 xptsetasyncfunc(struct cam_ed *device, void *arg)
2704 {
2705         struct cam_path path;
2706         struct ccb_getdev cgd;
2707         struct async_node *cur_entry;
2708
2709         cur_entry = (struct async_node *)arg;
2710
2711         /*
2712          * Don't report unconfigured devices (Wildcard devs,
2713          * devices only for target mode, device instances
2714          * that have been invalidated but are waiting for
2715          * their last reference count to be released).
2716          */
2717         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2718                 return (1);
2719
2720         xpt_compile_path(&path,
2721                          NULL,
2722                          device->target->bus->path_id,
2723                          device->target->target_id,
2724                          device->lun_id);
2725         xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2726         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2727         xpt_action((union ccb *)&cgd);
2728         cur_entry->callback(cur_entry->callback_arg,
2729                             AC_FOUND_DEVICE,
2730                             &path, &cgd);
2731         xpt_release_path(&path);
2732
2733         return(1);
2734 }
2735
2736 static int
2737 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2738 {
2739         struct cam_path path;
2740         struct ccb_pathinq cpi;
2741         struct async_node *cur_entry;
2742
2743         cur_entry = (struct async_node *)arg;
2744
2745         xpt_compile_path(&path, /*periph*/NULL,
2746                          bus->sim->path_id,
2747                          CAM_TARGET_WILDCARD,
2748                          CAM_LUN_WILDCARD);
2749         xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2750         cpi.ccb_h.func_code = XPT_PATH_INQ;
2751         xpt_action((union ccb *)&cpi);
2752         cur_entry->callback(cur_entry->callback_arg,
2753                             AC_PATH_REGISTERED,
2754                             &path, &cpi);
2755         xpt_release_path(&path);
2756
2757         return(1);
2758 }
2759
2760 void
2761 xpt_action(union ccb *start_ccb)
2762 {
2763         int iopl;
2764
2765         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2766
2767         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2768
2769         iopl = splsoftcam();
2770         switch (start_ccb->ccb_h.func_code) {
2771         case XPT_SCSI_IO:
2772         {
2773 #ifdef CAMDEBUG
2774                 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
2775                 struct cam_path *path;
2776
2777                 path = start_ccb->ccb_h.path;
2778 #endif
2779
2780                 /*
2781                  * For the sake of compatibility with SCSI-1
2782                  * devices that may not understand the identify
2783                  * message, we include lun information in the
2784                  * second byte of all commands.  SCSI-1 specifies
2785                  * that luns are a 3 bit value and reserves only 3
2786                  * bits for lun information in the CDB.  Later
2787                  * revisions of the SCSI spec allow for more than 8
2788                  * luns, but have deprecated lun information in the
2789                  * CDB.  So, if the lun won't fit, we must omit.
2790                  *
2791                  * Also be aware that during initial probing for devices,
2792                  * the inquiry information is unknown but initialized to 0.
2793                  * This means that this code will be exercised while probing
2794                  * devices with an ANSI revision greater than 2.
2795                  */
2796                 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2
2797                  && start_ccb->ccb_h.target_lun < 8
2798                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2799
2800                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2801                             start_ccb->ccb_h.target_lun << 5;
2802                 }
2803                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2804                 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
2805                           scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
2806                                        &path->device->inq_data),
2807                           scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
2808                                           cdb_str, sizeof(cdb_str))));
2809                 /* FALLTHROUGH */
2810         }
2811         case XPT_TARGET_IO:
2812         case XPT_CONT_TARGET_IO:
2813                 start_ccb->csio.sense_resid = 0;
2814                 start_ccb->csio.resid = 0;
2815                 /* FALLTHROUGH */
2816         case XPT_RESET_DEV:
2817         case XPT_ENG_EXEC:
2818         {
2819                 struct cam_path *path;
2820                 int s;
2821                 int runq;
2822
2823                 path = start_ccb->ccb_h.path;
2824                 s = splsoftcam();
2825
2826                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2827                 if (path->device->qfrozen_cnt == 0)
2828                         runq = xpt_schedule_dev_sendq(path->bus, path->device);
2829                 else
2830                         runq = 0;
2831                 splx(s);
2832                 if (runq != 0)
2833                         xpt_run_dev_sendq(path->bus);
2834                 break;
2835         }
2836         case XPT_SET_TRAN_SETTINGS:
2837         {
2838                 xpt_set_transfer_settings(&start_ccb->cts,
2839                                           start_ccb->ccb_h.path->device,
2840                                           /*async_update*/FALSE);
2841                 break;
2842         }
2843         case XPT_CALC_GEOMETRY:
2844         {
2845                 struct cam_sim *sim;
2846
2847                 /* Filter out garbage */
2848                 if (start_ccb->ccg.block_size == 0
2849                  || start_ccb->ccg.volume_size == 0) {
2850                         start_ccb->ccg.cylinders = 0;
2851                         start_ccb->ccg.heads = 0;
2852                         start_ccb->ccg.secs_per_track = 0;
2853                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2854                         break;
2855                 }
2856 #ifdef PC98
2857                 /*
2858                  * In a PC-98 system, geometry translation depens on
2859                  * the "real" device geometry obtained from mode page 4.
2860                  * SCSI geometry translation is performed in the
2861                  * initialization routine of the SCSI BIOS and the result
2862                  * stored in host memory.  If the translation is available
2863                  * in host memory, use it.  If not, rely on the default
2864                  * translation the device driver performs.
2865                  */
2866                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2867                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2868                         break;
2869                 }
2870 #endif
2871                 sim = start_ccb->ccb_h.path->bus->sim;
2872                 (*(sim->sim_action))(sim, start_ccb);
2873                 break;
2874         }
2875         case XPT_ABORT:
2876         {
2877                 union ccb* abort_ccb;
2878                 int s;                          
2879
2880                 abort_ccb = start_ccb->cab.abort_ccb;
2881                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2882
2883                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2884                                 struct cam_ccbq *ccbq;
2885
2886                                 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
2887                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2888                                 abort_ccb->ccb_h.status =
2889                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2890                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2891                                 s = splcam();
2892                                 xpt_done(abort_ccb);
2893                                 splx(s);
2894                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2895                                 break;
2896                         }
2897                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2898                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2899                                 /*
2900                                  * We've caught this ccb en route to
2901                                  * the SIM.  Flag it for abort and the
2902                                  * SIM will do so just before starting
2903                                  * real work on the CCB.
2904                                  */
2905                                 abort_ccb->ccb_h.status =
2906                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2907                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2908                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2909                                 break;
2910                         }
2911                 } 
2912                 if (XPT_FC_IS_QUEUED(abort_ccb)
2913                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2914                         /*
2915                          * It's already completed but waiting
2916                          * for our SWI to get to it.
2917                          */
2918                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2919                         break;
2920                 }
2921                 /*
2922                  * If we weren't able to take care of the abort request
2923                  * in the XPT, pass the request down to the SIM for processing.
2924                  */
2925                 /* FALLTHROUGH */
2926         }
2927         case XPT_ACCEPT_TARGET_IO:
2928         case XPT_EN_LUN:
2929         case XPT_IMMED_NOTIFY:
2930         case XPT_NOTIFY_ACK:
2931         case XPT_GET_TRAN_SETTINGS:
2932         case XPT_RESET_BUS:
2933         {
2934                 struct cam_sim *sim;
2935
2936                 sim = start_ccb->ccb_h.path->bus->sim;
2937                 (*(sim->sim_action))(sim, start_ccb);
2938                 break;
2939         }
2940         case XPT_PATH_INQ:
2941         {
2942                 struct cam_sim *sim;
2943
2944                 sim = start_ccb->ccb_h.path->bus->sim;
2945                 (*(sim->sim_action))(sim, start_ccb);
2946                 break;
2947         }
2948         case XPT_PATH_STATS:
2949                 start_ccb->cpis.last_reset =
2950                         start_ccb->ccb_h.path->bus->last_reset;
2951                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2952                 break;
2953         case XPT_GDEV_TYPE:
2954         {
2955                 struct cam_ed *dev;
2956                 int s;
2957
2958                 dev = start_ccb->ccb_h.path->device;
2959                 s = splcam();
2960                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2961                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2962                 } else {
2963                         struct ccb_getdev *cgd;
2964                         struct cam_eb *bus;
2965                         struct cam_et *tar;
2966
2967                         cgd = &start_ccb->cgd;
2968                         bus = cgd->ccb_h.path->bus;
2969                         tar = cgd->ccb_h.path->target;
2970                         cgd->inq_data = dev->inq_data;
2971                         cgd->ccb_h.status = CAM_REQ_CMP;
2972                         cgd->serial_num_len = dev->serial_num_len;
2973                         if ((dev->serial_num_len > 0)
2974                          && (dev->serial_num != NULL))
2975                                 bcopy(dev->serial_num, cgd->serial_num,
2976                                       dev->serial_num_len);
2977                 }
2978                 splx(s);
2979                 break; 
2980         }
2981         case XPT_GDEV_STATS:
2982         {
2983                 struct cam_ed *dev;
2984                 int s;
2985
2986                 dev = start_ccb->ccb_h.path->device;
2987                 s = splcam();
2988                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2989                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2990                 } else {
2991                         struct ccb_getdevstats *cgds;
2992                         struct cam_eb *bus;
2993                         struct cam_et *tar;
2994
2995                         cgds = &start_ccb->cgds;
2996                         bus = cgds->ccb_h.path->bus;
2997                         tar = cgds->ccb_h.path->target;
2998                         cgds->dev_openings = dev->ccbq.dev_openings;
2999                         cgds->dev_active = dev->ccbq.dev_active;
3000                         cgds->devq_openings = dev->ccbq.devq_openings;
3001                         cgds->devq_queued = dev->ccbq.queue.entries;
3002                         cgds->held = dev->ccbq.held;
3003                         cgds->last_reset = tar->last_reset;
3004                         cgds->maxtags = dev->quirk->maxtags;
3005                         cgds->mintags = dev->quirk->mintags;
3006                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3007                                 cgds->last_reset = bus->last_reset;
3008                         cgds->ccb_h.status = CAM_REQ_CMP;
3009                 }
3010                 splx(s);
3011                 break;
3012         }
3013         case XPT_GDEVLIST:
3014         {
3015                 struct cam_periph       *nperiph;
3016                 struct periph_list      *periph_head;
3017                 struct ccb_getdevlist   *cgdl;
3018                 int                     i;
3019                 int                     s;
3020                 struct cam_ed           *device;
3021                 int                     found;
3022
3023
3024                 found = 0;
3025
3026                 /*
3027                  * Don't want anyone mucking with our data.
3028                  */
3029                 s = splcam();
3030                 device = start_ccb->ccb_h.path->device;
3031                 periph_head = &device->periphs;
3032                 cgdl = &start_ccb->cgdl;
3033
3034                 /*
3035                  * Check and see if the list has changed since the user
3036                  * last requested a list member.  If so, tell them that the
3037                  * list has changed, and therefore they need to start over 
3038                  * from the beginning.
3039                  */
3040                 if ((cgdl->index != 0) && 
3041                     (cgdl->generation != device->generation)) {
3042                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3043                         splx(s);
3044                         break;
3045                 }
3046
3047                 /*
3048                  * Traverse the list of peripherals and attempt to find 
3049                  * the requested peripheral.
3050                  */
3051                 for (nperiph = periph_head->slh_first, i = 0;
3052                      (nperiph != NULL) && (i <= cgdl->index);
3053                      nperiph = nperiph->periph_links.sle_next, i++) {
3054                         if (i == cgdl->index) {
3055                                 strncpy(cgdl->periph_name,
3056                                         nperiph->periph_name,
3057                                         DEV_IDLEN);
3058                                 cgdl->unit_number = nperiph->unit_number;
3059                                 found = 1;
3060                         }
3061                 }
3062                 if (found == 0) {
3063                         cgdl->status = CAM_GDEVLIST_ERROR;
3064                         splx(s);
3065                         break;
3066                 }
3067
3068                 if (nperiph == NULL)
3069                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3070                 else
3071                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3072
3073                 cgdl->index++;
3074                 cgdl->generation = device->generation;
3075
3076                 splx(s);
3077                 cgdl->ccb_h.status = CAM_REQ_CMP;
3078                 break;
3079         }
3080         case XPT_DEV_MATCH:
3081         {
3082                 int s;
3083                 dev_pos_type position_type;
3084                 struct ccb_dev_match *cdm;
3085                 int ret;
3086
3087                 cdm = &start_ccb->cdm;
3088
3089                 /*
3090                  * Prevent EDT changes while we traverse it.
3091                  */
3092                 s = splcam();
3093                 /*
3094                  * There are two ways of getting at information in the EDT.
3095                  * The first way is via the primary EDT tree.  It starts
3096                  * with a list of busses, then a list of targets on a bus,
3097                  * then devices/luns on a target, and then peripherals on a
3098                  * device/lun.  The "other" way is by the peripheral driver
3099                  * lists.  The peripheral driver lists are organized by
3100                  * peripheral driver.  (obviously)  So it makes sense to
3101                  * use the peripheral driver list if the user is looking
3102                  * for something like "da1", or all "da" devices.  If the
3103                  * user is looking for something on a particular bus/target
3104                  * or lun, it's generally better to go through the EDT tree.
3105                  */
3106
3107                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3108                         position_type = cdm->pos.position_type;
3109                 else {
3110                         int i;
3111
3112                         position_type = CAM_DEV_POS_NONE;
3113
3114                         for (i = 0; i < cdm->num_patterns; i++) {
3115                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3116                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3117                                         position_type = CAM_DEV_POS_EDT;
3118                                         break;
3119                                 }
3120                         }
3121
3122                         if (cdm->num_patterns == 0)
3123                                 position_type = CAM_DEV_POS_EDT;
3124                         else if (position_type == CAM_DEV_POS_NONE)
3125                                 position_type = CAM_DEV_POS_PDRV;
3126                 }
3127
3128                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3129                 case CAM_DEV_POS_EDT:
3130                         ret = xptedtmatch(cdm);
3131                         break;
3132                 case CAM_DEV_POS_PDRV:
3133                         ret = xptperiphlistmatch(cdm);
3134                         break;
3135                 default:
3136                         cdm->status = CAM_DEV_MATCH_ERROR;
3137                         break;
3138                 }
3139
3140                 splx(s);
3141
3142                 if (cdm->status == CAM_DEV_MATCH_ERROR)
3143                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3144                 else
3145                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3146
3147                 break;
3148         }
3149         case XPT_SASYNC_CB:
3150         {
3151                 struct ccb_setasync *csa;
3152                 struct async_node *cur_entry;
3153                 struct async_list *async_head;
3154                 u_int32_t added;
3155                 int s;
3156
3157                 csa = &start_ccb->csa;
3158                 added = csa->event_enable;
3159                 async_head = &csa->ccb_h.path->device->asyncs;
3160
3161                 /*
3162                  * If there is already an entry for us, simply
3163                  * update it.
3164                  */
3165                 s = splcam();
3166                 cur_entry = SLIST_FIRST(async_head);
3167                 while (cur_entry != NULL) {
3168                         if ((cur_entry->callback_arg == csa->callback_arg)
3169                          && (cur_entry->callback == csa->callback))
3170                                 break;
3171                         cur_entry = SLIST_NEXT(cur_entry, links);
3172                 }
3173
3174                 if (cur_entry != NULL) {
3175                         /*
3176                          * If the request has no flags set,
3177                          * remove the entry.
3178                          */
3179                         added &= ~cur_entry->event_enable;
3180                         if (csa->event_enable == 0) {
3181                                 SLIST_REMOVE(async_head, cur_entry,
3182                                              async_node, links);
3183                                 csa->ccb_h.path->device->refcount--;
3184                                 free(cur_entry, M_DEVBUF);
3185                         } else {
3186                                 cur_entry->event_enable = csa->event_enable;
3187                         }
3188                 } else {
3189                         cur_entry = malloc(sizeof(*cur_entry), 
3190                                             M_DEVBUF, M_INTWAIT);
3191                         cur_entry->event_enable = csa->event_enable;
3192                         cur_entry->callback_arg = csa->callback_arg;
3193                         cur_entry->callback = csa->callback;
3194                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3195                         csa->ccb_h.path->device->refcount++;
3196                 }
3197
3198                 if ((added & AC_FOUND_DEVICE) != 0) {
3199                         /*
3200                          * Get this peripheral up to date with all
3201                          * the currently existing devices.
3202                          */
3203                         xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3204                 }
3205                 if ((added & AC_PATH_REGISTERED) != 0) {
3206                         /*
3207                          * Get this peripheral up to date with all
3208                          * the currently existing busses.
3209                          */
3210                         xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3211                 }
3212                 splx(s);
3213                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3214                 break;
3215         }
3216         case XPT_REL_SIMQ:
3217         {
3218                 struct ccb_relsim *crs;
3219                 struct cam_ed *dev;
3220                 int s;
3221
3222                 crs = &start_ccb->crs;
3223                 dev = crs->ccb_h.path->device;
3224                 if (dev == NULL) {
3225
3226                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3227                         break;
3228                 }
3229
3230                 s = splcam();
3231
3232                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3233
3234                         if ((dev->inq_data.flags & SID_CmdQue) != 0) {
3235
3236                                 /* Don't ever go below one opening */
3237                                 if (crs->openings > 0) {
3238                                         xpt_dev_ccbq_resize(crs->ccb_h.path,
3239                                                             crs->openings);
3240
3241                                         if (bootverbose) {
3242                                                 xpt_print_path(crs->ccb_h.path);
3243                                                 printf("tagged openings "
3244                                                        "now %d\n",
3245                                                        crs->openings);
3246                                         }
3247                                 }
3248                         }
3249                 }
3250
3251                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3252
3253                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3254
3255                                 /*
3256                                  * Just extend the old timeout and decrement
3257                                  * the freeze count so that a single timeout
3258                                  * is sufficient for releasing the queue.
3259                                  */
3260                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3261                                 untimeout(xpt_release_devq_timeout,
3262                                           dev, dev->c_handle);
3263                         } else {
3264
3265                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3266                         }
3267
3268                         dev->c_handle =
3269                                 timeout(xpt_release_devq_timeout,
3270                                         dev,
3271                                         (crs->release_timeout * hz) / 1000);
3272
3273                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3274
3275                 }
3276
3277                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3278
3279                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3280                                 /*
3281                                  * Decrement the freeze count so that a single
3282                                  * completion is still sufficient to unfreeze
3283                                  * the queue.
3284                                  */
3285                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3286                         } else {
3287                                 
3288                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3289                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3290                         }
3291                 }
3292
3293                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3294
3295                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3296                          || (dev->ccbq.dev_active == 0)) {
3297
3298                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3299                         } else {
3300                                 
3301                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3302                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3303                         }
3304                 }
3305                 splx(s);
3306                 
3307                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3308
3309                         xpt_release_devq(crs->ccb_h.path, /*count*/1,
3310                                          /*run_queue*/TRUE);
3311                 }
3312                 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3313                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3314                 break;
3315         }
3316         case XPT_SCAN_BUS:
3317                 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3318                 break;
3319         case XPT_SCAN_LUN:
3320                 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3321                              start_ccb->ccb_h.path, start_ccb->crcn.flags,
3322                              start_ccb);
3323                 break;
3324         case XPT_DEBUG: {
3325 #ifdef CAMDEBUG
3326                 int s;
3327                 
3328                 s = splcam();
3329 #ifdef CAM_DEBUG_DELAY
3330                 cam_debug_delay = CAM_DEBUG_DELAY;
3331 #endif
3332                 cam_dflags = start_ccb->cdbg.flags;
3333                 if (cam_dpath != NULL) {
3334                         xpt_free_path(cam_dpath);
3335                         cam_dpath = NULL;
3336                 }
3337
3338                 if (cam_dflags != CAM_DEBUG_NONE) {
3339                         if (xpt_create_path(&cam_dpath, xpt_periph,
3340                                             start_ccb->ccb_h.path_id,
3341                                             start_ccb->ccb_h.target_id,
3342                                             start_ccb->ccb_h.target_lun) !=
3343                                             CAM_REQ_CMP) {
3344                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3345                                 cam_dflags = CAM_DEBUG_NONE;
3346                         } else {
3347                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3348                                 xpt_print_path(cam_dpath);
3349                                 printf("debugging flags now %x\n", cam_dflags);
3350                         }
3351                 } else {
3352                         cam_dpath = NULL;
3353                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3354                 }
3355                 splx(s);
3356 #else /* !CAMDEBUG */
3357                 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3358 #endif /* CAMDEBUG */
3359                 break;
3360         }
3361         case XPT_NOOP:
3362                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3363                         xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3364                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3365                 break;
3366         default:
3367         case XPT_SDEV_TYPE:
3368         case XPT_TERM_IO:
3369         case XPT_ENG_INQ:
3370                 /* XXX Implement */
3371                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3372                 break;
3373         }
3374         splx(iopl);
3375 }
3376
3377 void
3378 xpt_polled_action(union ccb *start_ccb)
3379 {
3380         int       s;
3381         u_int32_t timeout;
3382         struct    cam_sim *sim; 
3383         struct    cam_devq *devq;
3384         struct    cam_ed *dev;
3385
3386         timeout = start_ccb->ccb_h.timeout;
3387         sim = start_ccb->ccb_h.path->bus->sim;
3388         devq = sim->devq;
3389         dev = start_ccb->ccb_h.path->device;
3390
3391         s = splcam();
3392
3393         /*
3394          * Steal an opening so that no other queued requests
3395          * can get it before us while we simulate interrupts.
3396          */
3397         dev->ccbq.devq_openings--;
3398         dev->ccbq.dev_openings--;       
3399         
3400         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0)
3401            && (--timeout > 0)) {
3402                 DELAY(1000);
3403                 (*(sim->sim_poll))(sim);
3404                 swi_camnet(NULL);
3405                 swi_cambio(NULL);               
3406         }
3407         
3408         dev->ccbq.devq_openings++;
3409         dev->ccbq.dev_openings++;
3410         
3411         if (timeout != 0) {
3412                 xpt_action(start_ccb);
3413                 while(--timeout > 0) {
3414                         (*(sim->sim_poll))(sim);
3415                         swi_camnet(NULL);
3416                         swi_cambio(NULL);
3417                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3418                             != CAM_REQ_INPROG)
3419                                 break;
3420                         DELAY(1000);
3421                 }
3422                 if (timeout == 0) {
3423                         /*
3424                          * XXX Is it worth adding a sim_timeout entry
3425                          * point so we can attempt recovery?  If
3426                          * this is only used for dumps, I don't think
3427                          * it is.
3428                          */
3429                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3430                 }
3431         } else {
3432                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3433         }
3434         splx(s);
3435 }
3436         
3437 /*
3438  * Schedule a peripheral driver to receive a ccb when it's
3439  * target device has space for more transactions.
3440  */
3441 void
3442 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3443 {
3444         struct cam_ed *device;
3445         int s;
3446         int runq;
3447
3448         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3449         device = perph->path->device;
3450         s = splsoftcam();
3451         if (periph_is_queued(perph)) {
3452                 /* Simply reorder based on new priority */
3453                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3454                           ("   change priority to %d\n", new_priority));
3455                 if (new_priority < perph->pinfo.priority) {
3456                         camq_change_priority(&device->drvq,
3457                                              perph->pinfo.index,
3458                                              new_priority);
3459                 }
3460                 runq = 0;
3461         } else {
3462                 /* New entry on the queue */
3463                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3464                           ("   added periph to queue\n"));
3465                 perph->pinfo.priority = new_priority;
3466                 perph->pinfo.generation = ++device->drvq.generation;
3467                 camq_insert(&device->drvq, &perph->pinfo);
3468                 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3469         }
3470         splx(s);
3471         if (runq != 0) {
3472                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3473                           ("   calling xpt_run_devq\n"));
3474                 xpt_run_dev_allocq(perph->path->bus);
3475         }
3476 }
3477
3478
3479 /*
3480  * Schedule a device to run on a given queue.
3481  * If the device was inserted as a new entry on the queue,
3482  * return 1 meaning the device queue should be run. If we
3483  * were already queued, implying someone else has already
3484  * started the queue, return 0 so the caller doesn't attempt
3485  * to run the queue.  Must be run at either splsoftcam
3486  * (or splcam since that encompases splsoftcam).
3487  */
3488 static int
3489 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3490                  u_int32_t new_priority)
3491 {
3492         int retval;
3493         u_int32_t old_priority;
3494
3495         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3496
3497         old_priority = pinfo->priority;
3498
3499         /*
3500          * Are we already queued?
3501          */
3502         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3503                 /* Simply reorder based on new priority */
3504                 if (new_priority < old_priority) {
3505                         camq_change_priority(queue, pinfo->index,
3506                                              new_priority);
3507                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3508                                         ("changed priority to %d\n",
3509                                          new_priority));
3510                 }
3511                 retval = 0;
3512         } else {
3513                 /* New entry on the queue */
3514                 if (new_priority < old_priority)
3515                         pinfo->priority = new_priority;
3516
3517                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3518                                 ("Inserting onto queue\n"));
3519                 pinfo->generation = ++queue->generation;
3520                 camq_insert(queue, pinfo);
3521                 retval = 1;
3522         }
3523         return (retval);
3524 }
3525
3526 static void
3527 xpt_run_dev_allocq(struct cam_eb *bus)
3528 {
3529         struct  cam_devq *devq;
3530         int     s;
3531
3532         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3533         devq = bus->sim->devq;
3534
3535         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3536                         ("   qfrozen_cnt == 0x%x, entries == %d, "
3537                          "openings == %d, active == %d\n",
3538                          devq->alloc_queue.qfrozen_cnt,
3539                          devq->alloc_queue.entries,
3540                          devq->alloc_openings,
3541                          devq->alloc_active));
3542
3543         s = splsoftcam();
3544         devq->alloc_queue.qfrozen_cnt++;
3545         while ((devq->alloc_queue.entries > 0)
3546             && (devq->alloc_openings > 0)
3547             && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3548                 struct  cam_ed_qinfo *qinfo;
3549                 struct  cam_ed *device;
3550                 union   ccb *work_ccb;
3551                 struct  cam_periph *drv;
3552                 struct  camq *drvq;
3553                 
3554                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3555                                                            CAMQ_HEAD);
3556                 device = qinfo->device;
3557
3558                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3559                                 ("running device %p\n", device));
3560
3561                 drvq = &device->drvq;
3562
3563 #ifdef CAMDEBUG
3564                 if (drvq->entries <= 0) {
3565                         panic("xpt_run_dev_allocq: "
3566                               "Device on queue without any work to do");
3567                 }
3568 #endif
3569                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3570                         devq->alloc_openings--;
3571                         devq->alloc_active++;
3572                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3573                         splx(s);
3574                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3575                                       drv->pinfo.priority);
3576                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3577                                         ("calling periph start\n"));
3578                         drv->periph_start(drv, work_ccb);
3579                 } else {
3580                         /*
3581                          * Malloc failure in alloc_ccb
3582                          */
3583                         /*
3584                          * XXX add us to a list to be run from free_ccb
3585                          * if we don't have any ccbs active on this
3586                          * device queue otherwise we may never get run
3587                          * again.
3588                          */
3589                         break;
3590                 }
3591         
3592                 /* Raise IPL for possible insertion and test at top of loop */
3593                 s = splsoftcam();
3594
3595                 if (drvq->entries > 0) {
3596                         /* We have more work.  Attempt to reschedule */
3597                         xpt_schedule_dev_allocq(bus, device);
3598                 }
3599         }
3600         devq->alloc_queue.qfrozen_cnt--;
3601         splx(s);
3602 }
3603
3604 static void
3605 xpt_run_dev_sendq(struct cam_eb *bus)
3606 {
3607         struct  cam_devq *devq;
3608         int     s;
3609
3610         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3611         
3612         devq = bus->sim->devq;
3613
3614         s = splcam();
3615         devq->send_queue.qfrozen_cnt++;
3616         splx(s);
3617         s = splsoftcam();
3618         while ((devq->send_queue.entries > 0)
3619             && (devq->send_openings > 0)) {
3620                 struct  cam_ed_qinfo *qinfo;
3621                 struct  cam_ed *device;
3622                 union ccb *work_ccb;
3623                 struct  cam_sim *sim;
3624                 int     ospl;
3625
3626                 ospl = splcam();
3627                 if (devq->send_queue.qfrozen_cnt > 1) {
3628                         splx(ospl);
3629                         break;
3630                 }
3631
3632                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3633                                                            CAMQ_HEAD);
3634                 device = qinfo->device;
3635
3636                 /*
3637                  * If the device has been "frozen", don't attempt
3638                  * to run it.
3639                  */
3640                 if (device->qfrozen_cnt > 0) {
3641                         splx(ospl);
3642                         continue;
3643                 }
3644
3645                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3646                                 ("running device %p\n", device));
3647
3648                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3649                 if (work_ccb == NULL) {
3650                         printf("device on run queue with no ccbs???\n");
3651                         splx(ospl);
3652                         continue;
3653                 }
3654
3655                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3656
3657                         if (num_highpower <= 0) {
3658                                 /*
3659                                  * We got a high power command, but we
3660                                  * don't have any available slots.  Freeze
3661                                  * the device queue until we have a slot
3662                                  * available.
3663                                  */
3664                                 device->qfrozen_cnt++;
3665                                 STAILQ_INSERT_TAIL(&highpowerq, 
3666                                                    &work_ccb->ccb_h, 
3667                                                    xpt_links.stqe);
3668
3669                                 splx(ospl);
3670                                 continue;
3671                         } else {
3672                                 /*
3673                                  * Consume a high power slot while
3674                                  * this ccb runs.
3675                                  */
3676                                 num_highpower--;
3677                         }
3678                 }
3679                 devq->active_dev = device;
3680                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3681
3682                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3683                 splx(ospl);
3684
3685                 devq->send_openings--;
3686                 devq->send_active++;            
3687                 
3688                 if (device->ccbq.queue.entries > 0)
3689                         xpt_schedule_dev_sendq(bus, device);
3690
3691                 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3692                         /*
3693                          * The client wants to freeze the queue
3694                          * after this CCB is sent.
3695                          */
3696                         ospl = splcam();
3697                         device->qfrozen_cnt++;
3698                         splx(ospl);
3699                 }
3700                 
3701                 splx(s);
3702
3703                 /* In Target mode, the peripheral driver knows best... */
3704                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3705                         if ((device->inq_flags & SID_CmdQue) != 0
3706                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3707                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3708                         else
3709                                 /*
3710                                  * Clear this in case of a retried CCB that
3711                                  * failed due to a rejected tag.
3712                                  */
3713                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3714                 }
3715
3716                 /*
3717                  * Device queues can be shared among multiple sim instances
3718                  * that reside on different busses.  Use the SIM in the queue
3719                  * CCB's path, rather than the one in the bus that was passed
3720                  * into this function.
3721                  */
3722                 sim = work_ccb->ccb_h.path->bus->sim;
3723                 (*(sim->sim_action))(sim, work_ccb);
3724
3725                 ospl = splcam();
3726                 devq->active_dev = NULL;
3727                 splx(ospl);
3728                 /* Raise IPL for possible insertion and test at top of loop */
3729                 s = splsoftcam();
3730         }
3731         splx(s);
3732         s = splcam();
3733         devq->send_queue.qfrozen_cnt--;
3734         splx(s);
3735 }
3736
3737 /*
3738  * This function merges stuff from the slave ccb into the master ccb, while
3739  * keeping important fields in the master ccb constant.
3740  */
3741 void
3742 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3743 {
3744         /*
3745          * Pull fields that are valid for peripheral drivers to set
3746          * into the master CCB along with the CCB "payload".
3747          */
3748         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3749         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3750         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3751         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3752         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3753               sizeof(union ccb) - sizeof(struct ccb_hdr));
3754 }
3755
3756 void
3757 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3758 {
3759         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3760         ccb_h->pinfo.priority = priority;
3761         ccb_h->path = path;
3762         ccb_h->path_id = path->bus->path_id;
3763         if (path->target)
3764                 ccb_h->target_id = path->target->target_id;
3765         else
3766                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3767         if (path->device) {
3768                 ccb_h->target_lun = path->device->lun_id;
3769                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3770         } else {
3771                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3772         }
3773         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3774         ccb_h->flags = 0;
3775 }
3776
3777 /* Path manipulation functions */
3778 cam_status
3779 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3780                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3781 {
3782         struct     cam_path *path;
3783         cam_status status;
3784
3785         path = malloc(sizeof(*path), M_DEVBUF, M_INTWAIT);
3786         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3787         if (status != CAM_REQ_CMP) {
3788                 free(path, M_DEVBUF);
3789                 path = NULL;
3790         }
3791         *new_path_ptr = path;
3792         return (status);
3793 }
3794
3795 static cam_status
3796 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3797                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)