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Make CAM_NEW_TRAN_CODE default.
[dragonfly.git] / sys / bus / cam / cam_xpt.c
blob8a8e1b2b2d3ebeb153467c37d8b9a592e6fc5bf6
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 1.64 2008/02/10 00:01:01 pavalos 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/device.h>
40 #include <sys/fcntl.h>
41 #include <sys/md5.h>
42 #include <sys/devicestat.h>
43 #include <sys/interrupt.h>
44 #include <sys/sbuf.h>
45 #include <sys/bus.h>
46 #include <sys/thread.h>
47 #include <sys/thread2.h>
48
49 #include <machine/clock.h>
50
51 #include "cam.h"
52 #include "cam_ccb.h"
53 #include "cam_periph.h"
54 #include "cam_sim.h"
55 #include "cam_xpt.h"
56 #include "cam_xpt_sim.h"
57 #include "cam_xpt_periph.h"
58 #include "cam_debug.h"
59
60 #include "scsi/scsi_all.h"
61 #include "scsi/scsi_message.h"
62 #include "scsi/scsi_pass.h"
63 #include "opt_cam.h"
64
65 /* Datastructures internal to the xpt layer */
66 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
67
68 /*
69 * Definition of an async handler callback block. These are used to add
70 * SIMs and peripherals to the async callback lists.
71 */
72 struct async_node {
73 SLIST_ENTRY(async_node) links;
74 u_int32_t event_enable; /* Async Event enables */
75 void (*callback)(void *arg, u_int32_t code,
76 struct cam_path *path, void *args);
77 void *callback_arg;
78 };
79
80 SLIST_HEAD(async_list, async_node);
81 SLIST_HEAD(periph_list, cam_periph);
82 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
83
84 /*
85 * This is the maximum number of high powered commands (e.g. start unit)
86 * that can be outstanding at a particular time.
87 */
88 #ifndef CAM_MAX_HIGHPOWER
89 #define CAM_MAX_HIGHPOWER 4
90 #endif
91
92 /* number of high powered commands that can go through right now */
93 static int num_highpower = CAM_MAX_HIGHPOWER;
94
95 /*
96 * Structure for queueing a device in a run queue.
97 * There is one run queue for allocating new ccbs,
98 * and another for sending ccbs to the controller.
99 */
100 struct cam_ed_qinfo {
101 cam_pinfo pinfo;
102 struct cam_ed *device;
103 };
104
105 /*
106 * The CAM EDT (Existing Device Table) contains the device information for
107 * all devices for all busses in the system. The table contains a
108 * cam_ed structure for each device on the bus.
109 */
110 struct cam_ed {
111 TAILQ_ENTRY(cam_ed) links;
112 struct cam_ed_qinfo alloc_ccb_entry;
113 struct cam_ed_qinfo send_ccb_entry;
114 struct cam_et *target;
115 lun_id_t lun_id;
116 struct camq drvq; /*
117 * Queue of type drivers wanting to do
118 * work on this device.
119 */
120 struct cam_ccbq ccbq; /* Queue of pending ccbs */
121 struct async_list asyncs; /* Async callback info for this B/T/L */
122 struct periph_list periphs; /* All attached devices */
123 u_int generation; /* Generation number */
124 struct cam_periph *owner; /* Peripheral driver's ownership tag */
125 struct xpt_quirk_entry *quirk; /* Oddities about this device */
126 /* Storage for the inquiry data */
127 cam_proto protocol;
128 u_int protocol_version;
129 cam_xport transport;
130 u_int transport_version;
131 struct scsi_inquiry_data inq_data;
132 u_int8_t inq_flags; /*
133 * Current settings for inquiry flags.
134 * This allows us to override settings
135 * like disconnection and tagged
136 * queuing for a device.
137 */
138 u_int8_t queue_flags; /* Queue flags from the control page */
139 u_int8_t serial_num_len;
140 u_int8_t *serial_num;
141 u_int32_t qfrozen_cnt;
142 u_int32_t flags;
143 #define CAM_DEV_UNCONFIGURED 0x01
144 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02
145 #define CAM_DEV_REL_ON_COMPLETE 0x04
146 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08
147 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10
148 #define CAM_DEV_TAG_AFTER_COUNT 0x20
149 #define CAM_DEV_INQUIRY_DATA_VALID 0x40
150 u_int32_t tag_delay_count;
151 #define CAM_TAG_DELAY_COUNT 5
152 u_int32_t tag_saved_openings;
153 u_int32_t refcount;
154 struct callout c_handle;
155 };
156
157 /*
158 * Each target is represented by an ET (Existing Target). These
159 * entries are created when a target is successfully probed with an
160 * identify, and removed when a device fails to respond after a number
161 * of retries, or a bus rescan finds the device missing.
162 */
163 struct cam_et {
164 TAILQ_HEAD(, cam_ed) ed_entries;
165 TAILQ_ENTRY(cam_et) links;
166 struct cam_eb *bus;
167 target_id_t target_id;
168 u_int32_t refcount;
169 u_int generation;
170 struct timeval last_reset; /* uptime of last reset */
171 };
172
173 /*
174 * Each bus is represented by an EB (Existing Bus). These entries
175 * are created by calls to xpt_bus_register and deleted by calls to
176 * xpt_bus_deregister.
177 */
178 struct cam_eb {
179 TAILQ_HEAD(, cam_et) et_entries;
180 TAILQ_ENTRY(cam_eb) links;
181 path_id_t path_id;
182 struct cam_sim *sim;
183 struct timeval last_reset; /* uptime of last reset */
184 u_int32_t flags;
185 #define CAM_EB_RUNQ_SCHEDULED 0x01
186 u_int32_t refcount;
187 u_int generation;
188 };
189
190 struct cam_path {
191 struct cam_periph *periph;
192 struct cam_eb *bus;
193 struct cam_et *target;
194 struct cam_ed *device;
195 };
196
197 struct xpt_quirk_entry {
198 struct scsi_inquiry_pattern inq_pat;
199 u_int8_t quirks;
200 #define CAM_QUIRK_NOLUNS 0x01
201 #define CAM_QUIRK_NOSERIAL 0x02
202 #define CAM_QUIRK_HILUNS 0x04
203 #define CAM_QUIRK_NOHILUNS 0x08
204 u_int mintags;
205 u_int maxtags;
206 };
207
208 static int cam_srch_hi = 0;
209 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi);
210 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS);
211 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0,
212 sysctl_cam_search_luns, "I",
213 "allow search above LUN 7 for SCSI3 and greater devices");
214
215 #define CAM_SCSI2_MAXLUN 8
216 /*
217 * If we're not quirked to search <= the first 8 luns
218 * and we are either quirked to search above lun 8,
219 * or we're > SCSI-2 and we've enabled hilun searching,
220 * or we're > SCSI-2 and the last lun was a success,
221 * we can look for luns above lun 8.
222 */
223 #define CAN_SRCH_HI_SPARSE(dv) \
224 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \
225 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \
226 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi)))
227
228 #define CAN_SRCH_HI_DENSE(dv) \
229 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \
230 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \
231 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2)))
232
233 typedef enum {
234 XPT_FLAG_OPEN = 0x01
235 } xpt_flags;
236
237 struct xpt_softc {
238 xpt_flags flags;
239 u_int32_t generation;
240 };
241
242 static const char quantum[] = "QUANTUM";
243 static const char sony[] = "SONY";
244 static const char west_digital[] = "WDIGTL";
245 static const char samsung[] = "SAMSUNG";
246 static const char seagate[] = "SEAGATE";
247 static const char microp[] = "MICROP";
248
249 static struct xpt_quirk_entry xpt_quirk_table[] =
250 {
251 {
252 /* Reports QUEUE FULL for temporary resource shortages */
253 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
254 /*quirks*/0, /*mintags*/24, /*maxtags*/32
255 },
256 {
257 /* Reports QUEUE FULL for temporary resource shortages */
258 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
259 /*quirks*/0, /*mintags*/24, /*maxtags*/32
260 },
261 {
262 /* Reports QUEUE FULL for temporary resource shortages */
263 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
264 /*quirks*/0, /*mintags*/24, /*maxtags*/32
265 },
266 {
267 /* Broken tagged queuing drive */
268 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
269 /*quirks*/0, /*mintags*/0, /*maxtags*/0
270 },
271 {
272 /* Broken tagged queuing drive */
273 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
274 /*quirks*/0, /*mintags*/0, /*maxtags*/0
275 },
276 {
277 /* Broken tagged queuing drive */
278 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
279 /*quirks*/0, /*mintags*/0, /*maxtags*/0
280 },
281 {
282 /*
283 * Unfortunately, the Quantum Atlas III has the same
284 * problem as the Atlas II drives above.
285 * Reported by: "Johan Granlund" <johan@granlund.nu>
286 *
287 * For future reference, the drive with the problem was:
288 * QUANTUM QM39100TD-SW N1B0
289 *
290 * It's possible that Quantum will fix the problem in later
291 * firmware revisions. If that happens, the quirk entry
292 * will need to be made specific to the firmware revisions
293 * with the problem.
294 *
295 */
296 /* Reports QUEUE FULL for temporary resource shortages */
297 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
298 /*quirks*/0, /*mintags*/24, /*maxtags*/32
299 },
300 {
301 /*
302 * 18 Gig Atlas III, same problem as the 9G version.
303 * Reported by: Andre Albsmeier
304 * <andre.albsmeier@mchp.siemens.de>
305 *
306 * For future reference, the drive with the problem was:
307 * QUANTUM QM318000TD-S N491
308 */
309 /* Reports QUEUE FULL for temporary resource shortages */
310 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
311 /*quirks*/0, /*mintags*/24, /*maxtags*/32
312 },
313 {
314 /*
315 * Broken tagged queuing drive
316 * Reported by: Bret Ford <bford@uop.cs.uop.edu>
317 * and: Martin Renters <martin@tdc.on.ca>
318 */
319 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
320 /*quirks*/0, /*mintags*/0, /*maxtags*/0
321 },
322 /*
323 * The Seagate Medalist Pro drives have very poor write
324 * performance with anything more than 2 tags.
325 *
326 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl>
327 * Drive: <SEAGATE ST36530N 1444>
328 *
329 * Reported by: Jeremy Lea <reg@shale.csir.co.za>
330 * Drive: <SEAGATE ST34520W 1281>
331 *
332 * No one has actually reported that the 9G version
333 * (ST39140*) of the Medalist Pro has the same problem, but
334 * we're assuming that it does because the 4G and 6.5G
335 * versions of the drive are broken.
336 */
337 {
338 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
339 /*quirks*/0, /*mintags*/2, /*maxtags*/2
340 },
341 {
342 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
343 /*quirks*/0, /*mintags*/2, /*maxtags*/2
344 },
345 {
346 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
347 /*quirks*/0, /*mintags*/2, /*maxtags*/2
348 },
349 {
350 /*
351 * Slow when tagged queueing is enabled. Write performance
352 * steadily drops off with more and more concurrent
353 * transactions. Best sequential write performance with
354 * tagged queueing turned off and write caching turned on.
355 *
356 * PR: kern/10398
357 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp>
358 * Drive: DCAS-34330 w/ "S65A" firmware.
359 *
360 * The drive with the problem had the "S65A" firmware
361 * revision, and has also been reported (by Stephen J.
362 * Roznowski <sjr@home.net>) for a drive with the "S61A"
363 * firmware revision.
364 *
365 * Although no one has reported problems with the 2 gig
366 * version of the DCAS drive, the assumption is that it
367 * has the same problems as the 4 gig version. Therefore
368 * this quirk entries disables tagged queueing for all
369 * DCAS drives.
370 */
371 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
372 /*quirks*/0, /*mintags*/0, /*maxtags*/0
373 },
374 {
375 /* Broken tagged queuing drive */
376 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
377 /*quirks*/0, /*mintags*/0, /*maxtags*/0
378 },
379 {
380 /* Broken tagged queuing drive */
381 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
382 /*quirks*/0, /*mintags*/0, /*maxtags*/0
383 },
384 {
385 /* This does not support other than LUN 0 */
386 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" },
387 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
388 },
389 {
390 /*
391 * Broken tagged queuing drive.
392 * Submitted by:
393 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
394 * in PR kern/9535
395 */
396 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
397 /*quirks*/0, /*mintags*/0, /*maxtags*/0
398 },
399 {
400 /*
401 * Slow when tagged queueing is enabled. (1.5MB/sec versus
402 * 8MB/sec.)
403 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
404 * Best performance with these drives is achieved with
405 * tagged queueing turned off, and write caching turned on.
406 */
407 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
408 /*quirks*/0, /*mintags*/0, /*maxtags*/0
409 },
410 {
411 /*
412 * Slow when tagged queueing is enabled. (1.5MB/sec versus
413 * 8MB/sec.)
414 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
415 * Best performance with these drives is achieved with
416 * tagged queueing turned off, and write caching turned on.
417 */
418 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
419 /*quirks*/0, /*mintags*/0, /*maxtags*/0
420 },
421 {
422 /*
423 * Doesn't handle queue full condition correctly,
424 * so we need to limit maxtags to what the device
425 * can handle instead of determining this automatically.
426 */
427 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
428 /*quirks*/0, /*mintags*/2, /*maxtags*/32
429 },
430 {
431 /* Really only one LUN */
432 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
433 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
434 },
435 {
436 /* I can't believe we need a quirk for DPT volumes. */
437 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
438 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS,
439 /*mintags*/0, /*maxtags*/255
440 },
441 {
442 /*
443 * Many Sony CDROM drives don't like multi-LUN probing.
444 */
445 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
446 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
447 },
448 {
449 /*
450 * This drive doesn't like multiple LUN probing.
451 * Submitted by: Parag Patel <parag@cgt.com>
452 */
453 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" },
454 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
455 },
456 {
457 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
458 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
459 },
460 {
461 /*
462 * The 8200 doesn't like multi-lun probing, and probably
463 * don't like serial number requests either.
464 */
465 {
466 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
467 "EXB-8200*", "*"
468 },
469 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
470 },
471 {
472 /*
473 * Let's try the same as above, but for a drive that says
474 * it's an IPL-6860 but is actually an EXB 8200.
475 */
476 {
477 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
478 "IPL-6860*", "*"
479 },
480 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
481 },
482 {
483 /*
484 * These Hitachi drives don't like multi-lun probing.
485 * The PR submitter has a DK319H, but says that the Linux
486 * kernel has a similar work-around for the DK312 and DK314,
487 * so all DK31* drives are quirked here.
488 * PR: misc/18793
489 * Submitted by: Paul Haddad <paul@pth.com>
490 */
491 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
492 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
493 },
494 {
495 /*
496 * The Hitachi CJ series with J8A8 firmware apparantly has
497 * problems with tagged commands.
498 * PR: 23536
499 * Reported by: amagai@nue.org
500 */
501 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" },
502 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
503 },
504 {
505 /*
506 * These are the large storage arrays.
507 * Submitted by: William Carrel <william.carrel@infospace.com>
508 */
509 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" },
510 CAM_QUIRK_HILUNS, 2, 1024
511 },
512 {
513 /*
514 * This old revision of the TDC3600 is also SCSI-1, and
515 * hangs upon serial number probing.
516 */
517 {
518 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
519 " TDC 3600", "U07:"
520 },
521 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
522 },
523 {
524 /*
525 * Maxtor Personal Storage 3000XT (Firewire)
526 * hangs upon serial number probing.
527 */
528 {
529 T_DIRECT, SIP_MEDIA_FIXED, "Maxtor",
530 "1394 storage", "*"
531 },
532 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
533 },
534 {
535 /*
536 * Would repond to all LUNs if asked for.
537 */
538 {
539 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
540 "CP150", "*"
541 },
542 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
543 },
544 {
545 /*
546 * Would repond to all LUNs if asked for.
547 */
548 {
549 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
550 "96X2*", "*"
551 },
552 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
553 },
554 {
555 /* Submitted by: Matthew Dodd <winter@jurai.net> */
556 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
557 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
558 },
559 {
560 /* Submitted by: Matthew Dodd <winter@jurai.net> */
561 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
562 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
563 },
564 {
565 /* TeraSolutions special settings for TRC-22 RAID */
566 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
567 /*quirks*/0, /*mintags*/55, /*maxtags*/255
568 },
569 {
570 /* Veritas Storage Appliance */
571 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
572 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
573 },
574 {
575 /*
576 * Would respond to all LUNs. Device type and removable
577 * flag are jumper-selectable.
578 */
579 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
580 "Tahiti 1", "*"
581 },
582 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
583 },
584 {
585 /* EasyRAID E5A aka. areca ARC-6010 */
586 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" },
587 CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255
588 },
589 {
590 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" },
591 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
592 },
593 {
594 /*
595 * Western Digital My Book 250GB (USB)
596 * hangs upon serial number probing.
597 * PR: 107495
598 */
599 {
600 T_DIRECT, SIP_MEDIA_FIXED, "WD",
601 "2500JB External", "*"
602 },
603 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
604 },
605 {
606 /* Default tagged queuing parameters for all devices */
607 {
608 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
609 /*vendor*/"*", /*product*/"*", /*revision*/"*"
610 },
611 /*quirks*/0, /*mintags*/2, /*maxtags*/255
612 },
613 };
614
615 static const int xpt_quirk_table_size =
616 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
617
618 typedef enum {
619 DM_RET_COPY = 0x01,
620 DM_RET_FLAG_MASK = 0x0f,
621 DM_RET_NONE = 0x00,
622 DM_RET_STOP = 0x10,
623 DM_RET_DESCEND = 0x20,
624 DM_RET_ERROR = 0x30,
625 DM_RET_ACTION_MASK = 0xf0
626 } dev_match_ret;
627
628 typedef enum {
629 XPT_DEPTH_BUS,
630 XPT_DEPTH_TARGET,
631 XPT_DEPTH_DEVICE,
632 XPT_DEPTH_PERIPH
633 } xpt_traverse_depth;
634
635 struct xpt_traverse_config {
636 xpt_traverse_depth depth;
637 void *tr_func;
638 void *tr_arg;
639 };
640
641 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
642 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
643 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
644 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
645 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
646
647 /* Transport layer configuration information */
648 static struct xpt_softc xsoftc;
649
650 /* Queues for our software interrupt handler */
651 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
652 static cam_isrq_t cam_bioq;
653
654 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */
655 static SLIST_HEAD(,ccb_hdr) ccb_freeq;
656 static u_int xpt_max_ccbs; /*
657 * Maximum size of ccb pool. Modified as
658 * devices are added/removed or have their
659 * opening counts changed.
660 */
661 static u_int xpt_ccb_count; /* Current count of allocated ccbs */
662
663 struct cam_periph *xpt_periph;
664
665 static periph_init_t xpt_periph_init;
666
667 static periph_init_t probe_periph_init;
668
669 static struct periph_driver xpt_driver =
670 {
671 xpt_periph_init, "xpt",
672 TAILQ_HEAD_INITIALIZER(xpt_driver.units)
673 };
674
675 static struct periph_driver probe_driver =
676 {
677 probe_periph_init, "probe",
678 TAILQ_HEAD_INITIALIZER(probe_driver.units)
679 };
680
681 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
682 PERIPHDRIVER_DECLARE(probe, probe_driver);
683
684 #define XPT_CDEV_MAJOR 104
685
686 static d_open_t xptopen;
687 static d_close_t xptclose;
688 static d_ioctl_t xptioctl;
689
690 static struct dev_ops xpt_ops = {
691 { "xpt", XPT_CDEV_MAJOR, 0 },
692 .d_open = xptopen,
693 .d_close = xptclose,
694 .d_ioctl = xptioctl
695 };
696
697 static struct intr_config_hook *xpt_config_hook;
698
699 static void dead_sim_action(struct cam_sim *sim, union ccb *ccb);
700 static void dead_sim_poll(struct cam_sim *sim);
701
702 /* Dummy SIM that is used when the real one has gone. */
703 static struct cam_sim cam_dead_sim = {
704 .sim_action = dead_sim_action,
705 .sim_poll = dead_sim_poll,
706 .sim_name = "dead_sim",
707 };
708
709 #define SIM_DEAD(sim) ((sim) == &cam_dead_sim)
710
711 /* Registered busses */
712 static TAILQ_HEAD(,cam_eb) xpt_busses;
713 static u_int bus_generation;
714
715 /* Storage for debugging datastructures */
716 #ifdef CAMDEBUG
717 struct cam_path *cam_dpath;
718 u_int32_t cam_dflags;
719 u_int32_t cam_debug_delay;
720 #endif
721
722 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
723 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
724 #endif
725
726 /*
727 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
728 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS,
729 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
730 */
731 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
732 || defined(CAM_DEBUG_LUN)
733 #ifdef CAMDEBUG
734 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
735 || !defined(CAM_DEBUG_LUN)
736 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
737 and CAM_DEBUG_LUN"
738 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
739 #else /* !CAMDEBUG */
740 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
741 #endif /* CAMDEBUG */
742 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
743
744 /* Our boot-time initialization hook */
745 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
746
747 static moduledata_t cam_moduledata = {
748 "cam",
749 cam_module_event_handler,
750 NULL
751 };
752
753 static void xpt_init(void *);
754
755 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
756 MODULE_VERSION(cam, 1);
757
758
759 static cam_status xpt_compile_path(struct cam_path *new_path,
760 struct cam_periph *perph,
761 path_id_t path_id,
762 target_id_t target_id,
763 lun_id_t lun_id);
764
765 static void xpt_release_path(struct cam_path *path);
766
767 static void xpt_async_bcast(struct async_list *async_head,
768 u_int32_t async_code,
769 struct cam_path *path,
770 void *async_arg);
771 static void xpt_dev_async(u_int32_t async_code,
772 struct cam_eb *bus,
773 struct cam_et *target,
774 struct cam_ed *device,
775 void *async_arg);
776 static path_id_t xptnextfreepathid(void);
777 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
778 static union ccb *xpt_get_ccb(struct cam_ed *device);
779 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
780 u_int32_t new_priority);
781 static void xpt_run_dev_allocq(struct cam_eb *bus);
782 static void xpt_run_dev_sendq(struct cam_eb *bus);
783 static timeout_t xpt_release_devq_timeout;
784 static void xpt_release_bus(struct cam_eb *bus);
785 static void xpt_release_devq_device(struct cam_ed *dev, u_int count,
786 int run_queue);
787 static struct cam_et*
788 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
789 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target);
790 static struct cam_ed*
791 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
792 lun_id_t lun_id);
793 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target,
794 struct cam_ed *device);
795 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
796 static struct cam_eb*
797 xpt_find_bus(path_id_t path_id);
798 static struct cam_et*
799 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
800 static struct cam_ed*
801 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
802 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
803 static void xpt_scan_lun(struct cam_periph *periph,
804 struct cam_path *path, cam_flags flags,
805 union ccb *ccb);
806 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb);
807 static xpt_busfunc_t xptconfigbuscountfunc;
808 static xpt_busfunc_t xptconfigfunc;
809 static void xpt_config(void *arg);
810 static xpt_devicefunc_t xptpassannouncefunc;
811 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
812 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
813 static void xptpoll(struct cam_sim *sim);
814 static inthand2_t swi_cambio;
815 static void camisr(cam_isrq_t *queue);
816 #if 0
817 static void xptstart(struct cam_periph *periph, union ccb *work_ccb);
818 static void xptasync(struct cam_periph *periph,
819 u_int32_t code, cam_path *path);
820 #endif
821 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
822 u_int num_patterns, struct cam_eb *bus);
823 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
824 u_int num_patterns,
825 struct cam_ed *device);
826 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
827 u_int num_patterns,
828 struct cam_periph *periph);
829 static xpt_busfunc_t xptedtbusfunc;
830 static xpt_targetfunc_t xptedttargetfunc;
831 static xpt_devicefunc_t xptedtdevicefunc;
832 static xpt_periphfunc_t xptedtperiphfunc;
833 static xpt_pdrvfunc_t xptplistpdrvfunc;
834 static xpt_periphfunc_t xptplistperiphfunc;
835 static int xptedtmatch(struct ccb_dev_match *cdm);
836 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
837 static int xptbustraverse(struct cam_eb *start_bus,
838 xpt_busfunc_t *tr_func, void *arg);
839 static int xpttargettraverse(struct cam_eb *bus,
840 struct cam_et *start_target,
841 xpt_targetfunc_t *tr_func, void *arg);
842 static int xptdevicetraverse(struct cam_et *target,
843 struct cam_ed *start_device,
844 xpt_devicefunc_t *tr_func, void *arg);
845 static int xptperiphtraverse(struct cam_ed *device,
846 struct cam_periph *start_periph,
847 xpt_periphfunc_t *tr_func, void *arg);
848 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
849 xpt_pdrvfunc_t *tr_func, void *arg);
850 static int xptpdperiphtraverse(struct periph_driver **pdrv,
851 struct cam_periph *start_periph,
852 xpt_periphfunc_t *tr_func,
853 void *arg);
854 static xpt_busfunc_t xptdefbusfunc;
855 static xpt_targetfunc_t xptdeftargetfunc;
856 static xpt_devicefunc_t xptdefdevicefunc;
857 static xpt_periphfunc_t xptdefperiphfunc;
858 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
859 #ifdef notusedyet
860 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func,
861 void *arg);
862 #endif
863 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func,
864 void *arg);
865 #ifdef notusedyet
866 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func,
867 void *arg);
868 #endif
869 static xpt_devicefunc_t xptsetasyncfunc;
870 static xpt_busfunc_t xptsetasyncbusfunc;
871 static cam_status xptregister(struct cam_periph *periph,
872 void *arg);
873 static cam_status proberegister(struct cam_periph *periph,
874 void *arg);
875 static void probeschedule(struct cam_periph *probe_periph);
876 static void probestart(struct cam_periph *periph, union ccb *start_ccb);
877 static void proberequestdefaultnegotiation(struct cam_periph *periph);
878 static void probedone(struct cam_periph *periph, union ccb *done_ccb);
879 static void probecleanup(struct cam_periph *periph);
880 static void xpt_find_quirk(struct cam_ed *device);
881 static void xpt_devise_transport(struct cam_path *path);
882 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts,
883 struct cam_ed *device,
884 int async_update);
885 static void xpt_toggle_tags(struct cam_path *path);
886 static void xpt_start_tags(struct cam_path *path);
887 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
888 struct cam_ed *dev);
889 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
890 struct cam_ed *dev);
891 static __inline int periph_is_queued(struct cam_periph *periph);
892 static __inline int device_is_alloc_queued(struct cam_ed *device);
893 static __inline int device_is_send_queued(struct cam_ed *device);
894 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
895
896 static __inline int
897 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
898 {
899 int retval;
900
901 if (bus->sim->devq && dev->ccbq.devq_openings > 0) {
902 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
903 cam_ccbq_resize(&dev->ccbq,
904 dev->ccbq.dev_openings
905 + dev->ccbq.dev_active);
906 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
907 }
908 /*
909 * The priority of a device waiting for CCB resources
910 * is that of the the highest priority peripheral driver
911 * enqueued.
912 */
913 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
914 &dev->alloc_ccb_entry.pinfo,
915 CAMQ_GET_HEAD(&dev->drvq)->priority);
916 } else {
917 retval = 0;
918 }
919
920 return (retval);
921 }
922
923 static __inline int
924 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
925 {
926 int retval;
927
928 if (bus->sim->devq && dev->ccbq.dev_openings > 0) {
929 /*
930 * The priority of a device waiting for controller
931 * resources is that of the the highest priority CCB
932 * enqueued.
933 */
934 retval =
935 xpt_schedule_dev(&bus->sim->devq->send_queue,
936 &dev->send_ccb_entry.pinfo,
937 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
938 } else {
939 retval = 0;
940 }
941 return (retval);
942 }
943
944 static __inline int
945 periph_is_queued(struct cam_periph *periph)
946 {
947 return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
948 }
949
950 static __inline int
951 device_is_alloc_queued(struct cam_ed *device)
952 {
953 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
954 }
955
956 static __inline int
957 device_is_send_queued(struct cam_ed *device)
958 {
959 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
960 }
961
962 static __inline int
963 dev_allocq_is_runnable(struct cam_devq *devq)
964 {
965 /*
966 * Have work to do.
967 * Have space to do more work.
968 * Allowed to do work.
969 */
970 return ((devq->alloc_queue.qfrozen_cnt == 0)
971 && (devq->alloc_queue.entries > 0)
972 && (devq->alloc_openings > 0));
973 }
974
975 static void
976 xpt_periph_init(void)
977 {
978 dev_ops_add(&xpt_ops, 0, 0);
979 make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
980 }
981
982 static void
983 probe_periph_init(void)
984 {
985 }
986
987
988 static void
989 xptdone(struct cam_periph *periph, union ccb *done_ccb)
990 {
991 /* Caller will release the CCB */
992 wakeup(&done_ccb->ccb_h.cbfcnp);
993 }
994
995 static int
996 xptopen(struct dev_open_args *ap)
997 {
998 cdev_t dev = ap->a_head.a_dev;
999 int unit;
1000
1001 unit = minor(dev) & 0xff;
1002
1003 /*
1004 * Only allow read-write access.
1005 */
1006 if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0))
1007 return(EPERM);
1008
1009 /*
1010 * We don't allow nonblocking access.
1011 */
1012 if ((ap->a_oflags & O_NONBLOCK) != 0) {
1013 kprintf("xpt%d: can't do nonblocking access\n", unit);
1014 return(ENODEV);
1015 }
1016
1017 /*
1018 * We only have one transport layer right now. If someone accesses
1019 * us via something other than minor number 1, point out their
1020 * mistake.
1021 */
1022 if (unit != 0) {
1023 kprintf("xptopen: got invalid xpt unit %d\n", unit);
1024 return(ENXIO);
1025 }
1026
1027 /* Mark ourselves open */
1028 xsoftc.flags |= XPT_FLAG_OPEN;
1029
1030 return(0);
1031 }
1032
1033 static int
1034 xptclose(struct dev_close_args *ap)
1035 {
1036 cdev_t dev = ap->a_head.a_dev;
1037 int unit;
1038
1039 unit = minor(dev) & 0xff;
1040
1041 /*
1042 * We only have one transport layer right now. If someone accesses
1043 * us via something other than minor number 1, point out their
1044 * mistake.
1045 */
1046 if (unit != 0) {
1047 kprintf("xptclose: got invalid xpt unit %d\n", unit);
1048 return(ENXIO);
1049 }
1050
1051 /* Mark ourselves closed */
1052 xsoftc.flags &= ~XPT_FLAG_OPEN;
1053
1054 return(0);
1055 }
1056
1057 static int
1058 xptioctl(struct dev_ioctl_args *ap)
1059 {
1060 cdev_t dev = ap->a_head.a_dev;
1061 int unit, error;
1062
1063 error = 0;
1064 unit = minor(dev) & 0xff;
1065
1066 /*
1067 * We only have one transport layer right now. If someone accesses
1068 * us via something other than minor number 1, point out their
1069 * mistake.
1070 */
1071 if (unit != 0) {
1072 kprintf("xptioctl: got invalid xpt unit %d\n", unit);
1073 return(ENXIO);
1074 }
1075
1076 switch(ap->a_cmd) {
1077 /*
1078 * For the transport layer CAMIOCOMMAND ioctl, we really only want
1079 * to accept CCB types that don't quite make sense to send through a
1080 * passthrough driver.
1081 */
1082 case CAMIOCOMMAND: {
1083 union ccb *ccb;
1084 union ccb *inccb;
1085
1086 inccb = (union ccb *)ap->a_data;
1087
1088 switch(inccb->ccb_h.func_code) {
1089 case XPT_SCAN_BUS:
1090 case XPT_RESET_BUS:
1091 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
1092 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
1093 error = EINVAL;
1094 break;
1095 }
1096 /* FALLTHROUGH */
1097 case XPT_PATH_INQ:
1098 case XPT_ENG_INQ:
1099 case XPT_SCAN_LUN:
1100
1101 ccb = xpt_alloc_ccb();
1102
1103 /*
1104 * Create a path using the bus, target, and lun the
1105 * user passed in.
1106 */
1107 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1108 inccb->ccb_h.path_id,
1109 inccb->ccb_h.target_id,
1110 inccb->ccb_h.target_lun) !=
1111 CAM_REQ_CMP){
1112 error = EINVAL;
1113 xpt_free_ccb(ccb);
1114 break;
1115 }
1116 /* Ensure all of our fields are correct */
1117 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1118 inccb->ccb_h.pinfo.priority);
1119 xpt_merge_ccb(ccb, inccb);
1120 ccb->ccb_h.cbfcnp = xptdone;
1121 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1122 bcopy(ccb, inccb, sizeof(union ccb));
1123 xpt_free_path(ccb->ccb_h.path);
1124 xpt_free_ccb(ccb);
1125 break;
1126
1127 case XPT_DEBUG: {
1128 union ccb ccb;
1129
1130 /*
1131 * This is an immediate CCB, so it's okay to
1132 * allocate it on the stack.
1133 */
1134
1135 /*
1136 * Create a path using the bus, target, and lun the
1137 * user passed in.
1138 */
1139 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1140 inccb->ccb_h.path_id,
1141 inccb->ccb_h.target_id,
1142 inccb->ccb_h.target_lun) !=
1143 CAM_REQ_CMP){
1144 error = EINVAL;
1145 break;
1146 }
1147 /* Ensure all of our fields are correct */
1148 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1149 inccb->ccb_h.pinfo.priority);
1150 xpt_merge_ccb(&ccb, inccb);
1151 ccb.ccb_h.cbfcnp = xptdone;
1152 xpt_action(&ccb);
1153 bcopy(&ccb, inccb, sizeof(union ccb));
1154 xpt_free_path(ccb.ccb_h.path);
1155 break;
1156
1157 }
1158 case XPT_DEV_MATCH: {
1159 struct cam_periph_map_info mapinfo;
1160 struct cam_path *old_path;
1161
1162 /*
1163 * We can't deal with physical addresses for this
1164 * type of transaction.
1165 */
1166 if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1167 error = EINVAL;
1168 break;
1169 }
1170
1171 /*
1172 * Save this in case the caller had it set to
1173 * something in particular.
1174 */
1175 old_path = inccb->ccb_h.path;
1176
1177 /*
1178 * We really don't need a path for the matching
1179 * code. The path is needed because of the
1180 * debugging statements in xpt_action(). They
1181 * assume that the CCB has a valid path.
1182 */
1183 inccb->ccb_h.path = xpt_periph->path;
1184
1185 bzero(&mapinfo, sizeof(mapinfo));
1186
1187 /*
1188 * Map the pattern and match buffers into kernel
1189 * virtual address space.
1190 */
1191 error = cam_periph_mapmem(inccb, &mapinfo);
1192
1193 if (error) {
1194 inccb->ccb_h.path = old_path;
1195 break;
1196 }
1197
1198 /*
1199 * This is an immediate CCB, we can send it on directly.
1200 */
1201 xpt_action(inccb);
1202
1203 /*
1204 * Map the buffers back into user space.
1205 */
1206 cam_periph_unmapmem(inccb, &mapinfo);
1207
1208 inccb->ccb_h.path = old_path;
1209
1210 error = 0;
1211 break;
1212 }
1213 default:
1214 error = ENOTSUP;
1215 break;
1216 }
1217 break;
1218 }
1219 /*
1220 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1221 * with the periphal driver name and unit name filled in. The other
1222 * fields don't really matter as input. The passthrough driver name
1223 * ("pass"), and unit number are passed back in the ccb. The current
1224 * device generation number, and the index into the device peripheral
1225 * driver list, and the status are also passed back. Note that
1226 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1227 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
1228 * (or rather should be) impossible for the device peripheral driver
1229 * list to change since we look at the whole thing in one pass, and
1230 * we do it within a critical section.
1231 *
1232 */
1233 case CAMGETPASSTHRU: {
1234 union ccb *ccb;
1235 struct cam_periph *periph;
1236 struct periph_driver **p_drv;
1237 char *name;
1238 u_int unit;
1239 u_int cur_generation;
1240 int base_periph_found;
1241 int splbreaknum;
1242
1243 ccb = (union ccb *)ap->a_data;
1244 unit = ccb->cgdl.unit_number;
1245 name = ccb->cgdl.periph_name;
1246 /*
1247 * Every 100 devices, we want to call splz() to check for
1248 * and allow the software interrupt handler a chance to run.
1249 *
1250 * Most systems won't run into this check, but this should
1251 * avoid starvation in the software interrupt handler in
1252 * large systems.
1253 */
1254 splbreaknum = 100;
1255
1256 ccb = (union ccb *)ap->a_data;
1257
1258 base_periph_found = 0;
1259
1260 /*
1261 * Sanity check -- make sure we don't get a null peripheral
1262 * driver name.
1263 */
1264 if (*ccb->cgdl.periph_name == '\0') {
1265 error = EINVAL;
1266 break;
1267 }
1268
1269 /* Keep the list from changing while we traverse it */
1270 crit_enter();
1271 ptstartover:
1272 cur_generation = xsoftc.generation;
1273
1274 /* first find our driver in the list of drivers */
1275 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
1276 if (strcmp((*p_drv)->driver_name, name) == 0)
1277 break;
1278 }
1279
1280 if (*p_drv == NULL) {
1281 crit_exit();
1282 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1283 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1284 *ccb->cgdl.periph_name = '\0';
1285 ccb->cgdl.unit_number = 0;
1286 error = ENOENT;
1287 break;
1288 }
1289
1290 /*
1291 * Run through every peripheral instance of this driver
1292 * and check to see whether it matches the unit passed
1293 * in by the user. If it does, get out of the loops and
1294 * find the passthrough driver associated with that
1295 * peripheral driver.
1296 */
1297 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) {
1298
1299 if (periph->unit_number == unit) {
1300 break;
1301 } else if (--splbreaknum == 0) {
1302 splz();
1303 splbreaknum = 100;
1304 if (cur_generation != xsoftc.generation)
1305 goto ptstartover;
1306 }
1307 }
1308 /*
1309 * If we found the peripheral driver that the user passed
1310 * in, go through all of the peripheral drivers for that
1311 * particular device and look for a passthrough driver.
1312 */
1313 if (periph != NULL) {
1314 struct cam_ed *device;
1315 int i;
1316
1317 base_periph_found = 1;
1318 device = periph->path->device;
1319 for (i = 0, periph = SLIST_FIRST(&device->periphs);
1320 periph != NULL;
1321 periph = SLIST_NEXT(periph, periph_links), i++) {
1322 /*
1323 * Check to see whether we have a
1324 * passthrough device or not.
1325 */
1326 if (strcmp(periph->periph_name, "pass") == 0) {
1327 /*
1328 * Fill in the getdevlist fields.
1329 */
1330 strcpy(ccb->cgdl.periph_name,
1331 periph->periph_name);
1332 ccb->cgdl.unit_number =
1333 periph->unit_number;
1334 if (SLIST_NEXT(periph, periph_links))
1335 ccb->cgdl.status =
1336 CAM_GDEVLIST_MORE_DEVS;
1337 else
1338 ccb->cgdl.status =
1339 CAM_GDEVLIST_LAST_DEVICE;
1340 ccb->cgdl.generation =
1341 device->generation;
1342 ccb->cgdl.index = i;
1343 /*
1344 * Fill in some CCB header fields
1345 * that the user may want.
1346 */
1347 ccb->ccb_h.path_id =
1348 periph->path->bus->path_id;
1349 ccb->ccb_h.target_id =
1350 periph->path->target->target_id;
1351 ccb->ccb_h.target_lun =
1352 periph->path->device->lun_id;
1353 ccb->ccb_h.status = CAM_REQ_CMP;
1354 break;
1355 }
1356 }
1357 }
1358
1359 /*
1360 * If the periph is null here, one of two things has
1361 * happened. The first possibility is that we couldn't
1362 * find the unit number of the particular peripheral driver
1363 * that the user is asking about. e.g. the user asks for
1364 * the passthrough driver for "da11". We find the list of
1365 * "da" peripherals all right, but there is no unit 11.
1366 * The other possibility is that we went through the list
1367 * of peripheral drivers attached to the device structure,
1368 * but didn't find one with the name "pass". Either way,
1369 * we return ENOENT, since we couldn't find something.
1370 */
1371 if (periph == NULL) {
1372 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1373 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1374 *ccb->cgdl.periph_name = '\0';
1375 ccb->cgdl.unit_number = 0;
1376 error = ENOENT;
1377 /*
1378 * It is unfortunate that this is even necessary,
1379 * but there are many, many clueless users out there.
1380 * If this is true, the user is looking for the
1381 * passthrough driver, but doesn't have one in his
1382 * kernel.
1383 */
1384 if (base_periph_found == 1) {
1385 kprintf("xptioctl: pass driver is not in the "
1386 "kernel\n");
1387 kprintf("xptioctl: put \"device pass0\" in "
1388 "your kernel config file\n");
1389 }
1390 }
1391 crit_exit();
1392 break;
1393 }
1394 default:
1395 error = ENOTTY;
1396 break;
1397 }
1398
1399 return(error);
1400 }
1401
1402 static int
1403 cam_module_event_handler(module_t mod, int what, void *arg)
1404 {
1405 if (what == MOD_LOAD) {
1406 xpt_init(NULL);
1407 } else if (what == MOD_UNLOAD) {
1408 return EBUSY;
1409 } else {
1410 return EOPNOTSUPP;
1411 }
1412
1413 return 0;
1414 }
1415
1416 /* Functions accessed by the peripheral drivers */
1417 static void
1418 xpt_init(void *dummy)
1419 {
1420 struct cam_sim *xpt_sim;
1421 struct cam_path *path;
1422 struct cam_devq *devq;
1423 cam_status status;
1424
1425 TAILQ_INIT(&xpt_busses);
1426 TAILQ_INIT(&cam_bioq);
1427 SLIST_INIT(&ccb_freeq);
1428 STAILQ_INIT(&highpowerq);
1429
1430 /*
1431 * The xpt layer is, itself, the equivelent of a SIM.
1432 * Allow 16 ccbs in the ccb pool for it. This should
1433 * give decent parallelism when we probe busses and
1434 * perform other XPT functions.
1435 */
1436 devq = cam_simq_alloc(16);
1437 xpt_sim = cam_sim_alloc(xptaction,
1438 xptpoll,
1439 "xpt",
1440 /*softc*/NULL,
1441 /*unit*/0,
1442 /*max_dev_transactions*/0,
1443 /*max_tagged_dev_transactions*/0,
1444 devq);
1445 cam_simq_release(devq);
1446 xpt_max_ccbs = 16;
1447
1448 xpt_bus_register(xpt_sim, /*bus #*/0);
1449
1450 /*
1451 * Looking at the XPT from the SIM layer, the XPT is
1452 * the equivelent of a peripheral driver. Allocate
1453 * a peripheral driver entry for us.
1454 */
1455 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1456 CAM_TARGET_WILDCARD,
1457 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1458 kprintf("xpt_init: xpt_create_path failed with status %#x,"
1459 " failing attach\n", status);
1460 return;
1461 }
1462
1463 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1464 path, NULL, 0, NULL);
1465 xpt_free_path(path);
1466
1467 xpt_sim->softc = xpt_periph;
1468
1469 /*
1470 * Register a callback for when interrupts are enabled.
1471 */
1472 xpt_config_hook = kmalloc(sizeof(struct intr_config_hook),
1473 M_TEMP, M_INTWAIT | M_ZERO);
1474 xpt_config_hook->ich_func = xpt_config;
1475 xpt_config_hook->ich_desc = "xpt";
1476 xpt_config_hook->ich_order = 1000;
1477 if (config_intrhook_establish(xpt_config_hook) != 0) {
1478 kfree (xpt_config_hook, M_TEMP);
1479 kprintf("xpt_init: config_intrhook_establish failed "
1480 "- failing attach\n");
1481 }
1482
1483 /* Install our software interrupt handlers */
1484 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL);
1485 }
1486
1487 static cam_status
1488 xptregister(struct cam_periph *periph, void *arg)
1489 {
1490 if (periph == NULL) {
1491 kprintf("xptregister: periph was NULL!!\n");
1492 return(CAM_REQ_CMP_ERR);
1493 }
1494
1495 periph->softc = NULL;
1496
1497 xpt_periph = periph;
1498
1499 return(CAM_REQ_CMP);
1500 }
1501
1502 int32_t
1503 xpt_add_periph(struct cam_periph *periph)
1504 {
1505 struct cam_ed *device;
1506 int32_t status;
1507 struct periph_list *periph_head;
1508
1509 device = periph->path->device;
1510
1511 periph_head = &device->periphs;
1512
1513 status = CAM_REQ_CMP;
1514
1515 if (device != NULL) {
1516 /*
1517 * Make room for this peripheral
1518 * so it will fit in the queue
1519 * when it's scheduled to run
1520 */
1521 crit_enter();
1522 status = camq_resize(&device->drvq,
1523 device->drvq.array_size + 1);
1524
1525 device->generation++;
1526
1527 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1528 crit_exit();
1529 }
1530
1531 xsoftc.generation++;
1532
1533 return (status);
1534 }
1535
1536 void
1537 xpt_remove_periph(struct cam_periph *periph)
1538 {
1539 struct cam_ed *device;
1540
1541 device = periph->path->device;
1542
1543 if (device != NULL) {
1544 struct periph_list *periph_head;
1545
1546 periph_head = &device->periphs;
1547
1548 /* Release the slot for this peripheral */
1549 crit_enter();
1550 camq_resize(&device->drvq, device->drvq.array_size - 1);
1551
1552 device->generation++;
1553
1554 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1555 crit_exit();
1556 }
1557
1558 xsoftc.generation++;
1559
1560 }
1561
1562 void
1563 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1564 {
1565 struct ccb_pathinq cpi;
1566 struct ccb_trans_settings cts;
1567 struct cam_path *path;
1568 u_int speed;
1569 u_int freq;
1570 u_int mb;
1571
1572 path = periph->path;
1573 /*
1574 * To ensure that this is printed in one piece,
1575 * mask out CAM interrupts.
1576 */
1577 crit_enter();
1578 kprintf("%s%d at %s%d bus %d target %d lun %d\n",
1579 periph->periph_name, periph->unit_number,
1580 path->bus->sim->sim_name,
1581 path->bus->sim->unit_number,
1582 path->bus->sim->bus_id,
1583 path->target->target_id,
1584 path->device->lun_id);
1585 kprintf("%s%d: ", periph->periph_name, periph->unit_number);
1586 scsi_print_inquiry(&path->device->inq_data);
1587 if (bootverbose && path->device->serial_num_len > 0) {
1588 /* Don't wrap the screen - print only the first 60 chars */
1589 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name,
1590 periph->unit_number, path->device->serial_num);
1591 }
1592 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1593 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1594 cts.type = CTS_TYPE_CURRENT_SETTINGS;
1595 xpt_action((union ccb*)&cts);
1596 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1597 return;
1598 }
1599
1600 /* Ask the SIM for its base transfer speed */
1601 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1602 cpi.ccb_h.func_code = XPT_PATH_INQ;
1603 xpt_action((union ccb *)&cpi);
1604
1605 speed = cpi.base_transfer_speed;
1606 freq = 0;
1607 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1608 struct ccb_trans_settings_spi *spi;
1609
1610 spi = &cts.xport_specific.spi;
1611 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0
1612 && spi->sync_offset != 0) {
1613 freq = scsi_calc_syncsrate(spi->sync_period);
1614 speed = freq;
1615 }
1616
1617 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0)
1618 speed *= (0x01 << spi->bus_width);
1619 }
1620 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1621 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc;
1622 if (fc->valid & CTS_FC_VALID_SPEED) {
1623 speed = fc->bitrate;
1624 }
1625 }
1626
1627 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) {
1628 struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas;
1629 if (sas->valid & CTS_SAS_VALID_SPEED) {
1630 speed = sas->bitrate;
1631 }
1632 }
1633
1634 mb = speed / 1000;
1635 if (mb > 0)
1636 kprintf("%s%d: %d.%03dMB/s transfers",
1637 periph->periph_name, periph->unit_number,
1638 mb, speed % 1000);
1639 else
1640 kprintf("%s%d: %dKB/s transfers", periph->periph_name,
1641 periph->unit_number, speed);
1642 /* Report additional information about SPI connections */
1643 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1644 struct ccb_trans_settings_spi *spi;
1645
1646 spi = &cts.xport_specific.spi;
1647 if (freq != 0) {
1648 kprintf(" (%d.%03dMHz%s, offset %d", freq / 1000,
1649 freq % 1000,
1650 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
1651 ? " DT" : "",
1652 spi->sync_offset);
1653 }
1654 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0
1655 && spi->bus_width > 0) {
1656 if (freq != 0) {
1657 kprintf(", ");
1658 } else {
1659 kprintf(" (");
1660 }
1661 kprintf("%dbit)", 8 * (0x01 << spi->bus_width));
1662 } else if (freq != 0) {
1663 kprintf(")");
1664 }
1665 }
1666 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1667 struct ccb_trans_settings_fc *fc;
1668
1669 fc = &cts.xport_specific.fc;
1670 if (fc->valid & CTS_FC_VALID_WWNN)
1671 kprintf(" WWNN 0x%llx", (long long) fc->wwnn);
1672 if (fc->valid & CTS_FC_VALID_WWPN)
1673 kprintf(" WWPN 0x%llx", (long long) fc->wwpn);
1674 if (fc->valid & CTS_FC_VALID_PORT)
1675 kprintf(" PortID 0x%x", fc->port);
1676 }
1677
1678 if (path->device->inq_flags & SID_CmdQue
1679 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1680 kprintf("\n%s%d: Tagged Queueing Enabled",
1681 periph->periph_name, periph->unit_number);
1682 }
1683 kprintf("\n");
1684
1685 /*
1686 * We only want to print the caller's announce string if they've
1687 * passed one in..
1688 */
1689 if (announce_string != NULL)
1690 kprintf("%s%d: %s\n", periph->periph_name,
1691 periph->unit_number, announce_string);
1692 crit_exit();
1693 }
1694
1695 static dev_match_ret
1696 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1697 struct cam_eb *bus)
1698 {
1699 dev_match_ret retval;
1700 int i;
1701
1702 retval = DM_RET_NONE;
1703
1704 /*
1705 * If we aren't given something to match against, that's an error.
1706 */
1707 if (bus == NULL)
1708 return(DM_RET_ERROR);
1709
1710 /*
1711 * If there are no match entries, then this bus matches no
1712 * matter what.
1713 */
1714 if ((patterns == NULL) || (num_patterns == 0))
1715 return(DM_RET_DESCEND | DM_RET_COPY);
1716
1717 for (i = 0; i < num_patterns; i++) {
1718 struct bus_match_pattern *cur_pattern;
1719
1720 /*
1721 * If the pattern in question isn't for a bus node, we
1722 * aren't interested. However, we do indicate to the
1723 * calling routine that we should continue descending the
1724 * tree, since the user wants to match against lower-level
1725 * EDT elements.
1726 */
1727 if (patterns[i].type != DEV_MATCH_BUS) {
1728 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1729 retval |= DM_RET_DESCEND;
1730 continue;
1731 }
1732
1733 cur_pattern = &patterns[i].pattern.bus_pattern;
1734
1735 /*
1736 * If they want to match any bus node, we give them any
1737 * device node.
1738 */
1739 if (cur_pattern->flags == BUS_MATCH_ANY) {
1740 /* set the copy flag */
1741 retval |= DM_RET_COPY;
1742
1743 /*
1744 * If we've already decided on an action, go ahead
1745 * and return.
1746 */
1747 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1748 return(retval);
1749 }
1750
1751 /*
1752 * Not sure why someone would do this...
1753 */
1754 if (cur_pattern->flags == BUS_MATCH_NONE)
1755 continue;
1756
1757 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1758 && (cur_pattern->path_id != bus->path_id))
1759 continue;
1760
1761 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1762 && (cur_pattern->bus_id != bus->sim->bus_id))
1763 continue;
1764
1765 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1766 && (cur_pattern->unit_number != bus->sim->unit_number))
1767 continue;
1768
1769 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1770 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1771 DEV_IDLEN) != 0))
1772 continue;
1773
1774 /*
1775 * If we get to this point, the user definitely wants
1776 * information on this bus. So tell the caller to copy the
1777 * data out.
1778 */
1779 retval |= DM_RET_COPY;
1780
1781 /*
1782 * If the return action has been set to descend, then we
1783 * know that we've already seen a non-bus matching
1784 * expression, therefore we need to further descend the tree.
1785 * This won't change by continuing around the loop, so we
1786 * go ahead and return. If we haven't seen a non-bus
1787 * matching expression, we keep going around the loop until
1788 * we exhaust the matching expressions. We'll set the stop
1789 * flag once we fall out of the loop.
1790 */
1791 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1792 return(retval);
1793 }
1794
1795 /*
1796 * If the return action hasn't been set to descend yet, that means
1797 * we haven't seen anything other than bus matching patterns. So
1798 * tell the caller to stop descending the tree -- the user doesn't
1799 * want to match against lower level tree elements.
1800 */
1801 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1802 retval |= DM_RET_STOP;
1803
1804 return(retval);
1805 }
1806
1807 static dev_match_ret
1808 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1809 struct cam_ed *device)
1810 {
1811 dev_match_ret retval;
1812 int i;
1813
1814 retval = DM_RET_NONE;
1815
1816 /*
1817 * If we aren't given something to match against, that's an error.
1818 */
1819 if (device == NULL)
1820 return(DM_RET_ERROR);
1821
1822 /*
1823 * If there are no match entries, then this device matches no
1824 * matter what.
1825 */
1826 if ((patterns == NULL) || (num_patterns == 0))
1827 return(DM_RET_DESCEND | DM_RET_COPY);
1828
1829 for (i = 0; i < num_patterns; i++) {
1830 struct device_match_pattern *cur_pattern;
1831
1832 /*
1833 * If the pattern in question isn't for a device node, we
1834 * aren't interested.
1835 */
1836 if (patterns[i].type != DEV_MATCH_DEVICE) {
1837 if ((patterns[i].type == DEV_MATCH_PERIPH)
1838 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1839 retval |= DM_RET_DESCEND;
1840 continue;
1841 }
1842
1843 cur_pattern = &patterns[i].pattern.device_pattern;
1844
1845 /*
1846 * If they want to match any device node, we give them any
1847 * device node.
1848 */
1849 if (cur_pattern->flags == DEV_MATCH_ANY) {
1850 /* set the copy flag */
1851 retval |= DM_RET_COPY;
1852
1853
1854 /*
1855 * If we've already decided on an action, go ahead
1856 * and return.
1857 */
1858 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1859 return(retval);
1860 }
1861
1862 /*
1863 * Not sure why someone would do this...
1864 */
1865 if (cur_pattern->flags == DEV_MATCH_NONE)
1866 continue;
1867
1868 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1869 && (cur_pattern->path_id != device->target->bus->path_id))
1870 continue;
1871
1872 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1873 && (cur_pattern->target_id != device->target->target_id))
1874 continue;
1875
1876 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1877 && (cur_pattern->target_lun != device->lun_id))
1878 continue;
1879
1880 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1881 && (cam_quirkmatch((caddr_t)&device->inq_data,
1882 (caddr_t)&cur_pattern->inq_pat,
1883 1, sizeof(cur_pattern->inq_pat),
1884 scsi_static_inquiry_match) == NULL))
1885 continue;
1886
1887 /*
1888 * If we get to this point, the user definitely wants
1889 * information on this device. So tell the caller to copy
1890 * the data out.
1891 */
1892 retval |= DM_RET_COPY;
1893
1894 /*
1895 * If the return action has been set to descend, then we
1896 * know that we've already seen a peripheral matching
1897 * expression, therefore we need to further descend the tree.
1898 * This won't change by continuing around the loop, so we
1899 * go ahead and return. If we haven't seen a peripheral
1900 * matching expression, we keep going around the loop until
1901 * we exhaust the matching expressions. We'll set the stop
1902 * flag once we fall out of the loop.
1903 */
1904 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1905 return(retval);
1906 }
1907
1908 /*
1909 * If the return action hasn't been set to descend yet, that means
1910 * we haven't seen any peripheral matching patterns. So tell the
1911 * caller to stop descending the tree -- the user doesn't want to
1912 * match against lower level tree elements.
1913 */
1914 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1915 retval |= DM_RET_STOP;
1916
1917 return(retval);
1918 }
1919
1920 /*
1921 * Match a single peripheral against any number of match patterns.
1922 */
1923 static dev_match_ret
1924 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1925 struct cam_periph *periph)
1926 {
1927 dev_match_ret retval;
1928 int i;
1929
1930 /*
1931 * If we aren't given something to match against, that's an error.
1932 */
1933 if (periph == NULL)
1934 return(DM_RET_ERROR);
1935
1936 /*
1937 * If there are no match entries, then this peripheral matches no
1938 * matter what.
1939 */
1940 if ((patterns == NULL) || (num_patterns == 0))
1941 return(DM_RET_STOP | DM_RET_COPY);
1942
1943 /*
1944 * There aren't any nodes below a peripheral node, so there's no
1945 * reason to descend the tree any further.
1946 */
1947 retval = DM_RET_STOP;
1948
1949 for (i = 0; i < num_patterns; i++) {
1950 struct periph_match_pattern *cur_pattern;
1951
1952 /*
1953 * If the pattern in question isn't for a peripheral, we
1954 * aren't interested.
1955 */
1956 if (patterns[i].type != DEV_MATCH_PERIPH)
1957 continue;
1958
1959 cur_pattern = &patterns[i].pattern.periph_pattern;
1960
1961 /*
1962 * If they want to match on anything, then we will do so.
1963 */
1964 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1965 /* set the copy flag */
1966 retval |= DM_RET_COPY;
1967
1968 /*
1969 * We've already set the return action to stop,
1970 * since there are no nodes below peripherals in
1971 * the tree.
1972 */
1973 return(retval);
1974 }
1975
1976 /*
1977 * Not sure why someone would do this...
1978 */
1979 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1980 continue;
1981
1982 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1983 && (cur_pattern->path_id != periph->path->bus->path_id))
1984 continue;
1985
1986 /*
1987 * For the target and lun id's, we have to make sure the
1988 * target and lun pointers aren't NULL. The xpt peripheral
1989 * has a wildcard target and device.
1990 */
1991 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1992 && ((periph->path->target == NULL)
1993 ||(cur_pattern->target_id != periph->path->target->target_id)))
1994 continue;
1995
1996 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1997 && ((periph->path->device == NULL)
1998 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1999 continue;
2000
2001 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
2002 && (cur_pattern->unit_number != periph->unit_number))
2003 continue;
2004
2005 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
2006 && (strncmp(cur_pattern->periph_name, periph->periph_name,
2007 DEV_IDLEN) != 0))
2008 continue;
2009
2010 /*
2011 * If we get to this point, the user definitely wants
2012 * information on this peripheral. So tell the caller to
2013 * copy the data out.
2014 */
2015 retval |= DM_RET_COPY;
2016
2017 /*
2018 * The return action has already been set to stop, since
2019 * peripherals don't have any nodes below them in the EDT.
2020 */
2021 return(retval);
2022 }
2023
2024 /*
2025 * If we get to this point, the peripheral that was passed in
2026 * doesn't match any of the patterns.
2027 */
2028 return(retval);
2029 }
2030
2031 static int
2032 xptedtbusfunc(struct cam_eb *bus, void *arg)
2033 {
2034 struct ccb_dev_match *cdm;
2035 dev_match_ret retval;
2036
2037 cdm = (struct ccb_dev_match *)arg;
2038
2039 /*
2040 * If our position is for something deeper in the tree, that means
2041 * that we've already seen this node. So, we keep going down.
2042 */
2043 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2044 && (cdm->pos.cookie.bus == bus)
2045 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2046 && (cdm->pos.cookie.target != NULL))
2047 retval = DM_RET_DESCEND;
2048 else
2049 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
2050
2051 /*
2052 * If we got an error, bail out of the search.
2053 */
2054 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2055 cdm->status = CAM_DEV_MATCH_ERROR;
2056 return(0);
2057 }
2058
2059 /*
2060 * If the copy flag is set, copy this bus out.
2061 */
2062 if (retval & DM_RET_COPY) {
2063 int spaceleft, j;
2064
2065 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2066 sizeof(struct dev_match_result));
2067
2068 /*
2069 * If we don't have enough space to put in another
2070 * match result, save our position and tell the
2071 * user there are more devices to check.
2072 */
2073 if (spaceleft < sizeof(struct dev_match_result)) {
2074 bzero(&cdm->pos, sizeof(cdm->pos));
2075 cdm->pos.position_type =
2076 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
2077
2078 cdm->pos.cookie.bus = bus;
2079 cdm->pos.generations[CAM_BUS_GENERATION]=
2080 bus_generation;
2081 cdm->status = CAM_DEV_MATCH_MORE;
2082 return(0);
2083 }
2084 j = cdm->num_matches;
2085 cdm->num_matches++;
2086 cdm->matches[j].type = DEV_MATCH_BUS;
2087 cdm->matches[j].result.bus_result.path_id = bus->path_id;
2088 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
2089 cdm->matches[j].result.bus_result.unit_number =
2090 bus->sim->unit_number;
2091 strncpy(cdm->matches[j].result.bus_result.dev_name,
2092 bus->sim->sim_name, DEV_IDLEN);
2093 }
2094
2095 /*
2096 * If the user is only interested in busses, there's no
2097 * reason to descend to the next level in the tree.
2098 */
2099 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2100 return(1);
2101
2102 /*
2103 * If there is a target generation recorded, check it to
2104 * make sure the target list hasn't changed.
2105 */
2106 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2107 && (bus == cdm->pos.cookie.bus)
2108 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2109 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
2110 && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
2111 bus->generation)) {
2112 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2113 return(0);
2114 }
2115
2116 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2117 && (cdm->pos.cookie.bus == bus)
2118 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2119 && (cdm->pos.cookie.target != NULL))
2120 return(xpttargettraverse(bus,
2121 (struct cam_et *)cdm->pos.cookie.target,
2122 xptedttargetfunc, arg));
2123 else
2124 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
2125 }
2126
2127 static int
2128 xptedttargetfunc(struct cam_et *target, void *arg)
2129 {
2130 struct ccb_dev_match *cdm;
2131
2132 cdm = (struct ccb_dev_match *)arg;
2133
2134 /*
2135 * If there is a device list generation recorded, check it to
2136 * make sure the device list hasn't changed.
2137 */
2138 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2139 && (cdm->pos.cookie.bus == target->bus)
2140 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2141 && (cdm->pos.cookie.target == target)
2142 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2143 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2144 && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2145 target->generation)) {
2146 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2147 return(0);
2148 }
2149
2150 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2151 && (cdm->pos.cookie.bus == target->bus)
2152 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2153 && (cdm->pos.cookie.target == target)
2154 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2155 && (cdm->pos.cookie.device != NULL))
2156 return(xptdevicetraverse(target,
2157 (struct cam_ed *)cdm->pos.cookie.device,
2158 xptedtdevicefunc, arg));
2159 else
2160 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2161 }
2162
2163 static int
2164 xptedtdevicefunc(struct cam_ed *device, void *arg)
2165 {
2166
2167 struct ccb_dev_match *cdm;
2168 dev_match_ret retval;
2169
2170 cdm = (struct ccb_dev_match *)arg;
2171
2172 /*
2173 * If our position is for something deeper in the tree, that means
2174 * that we've already seen this node. So, we keep going down.
2175 */
2176 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2177 && (cdm->pos.cookie.device == device)
2178 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2179 && (cdm->pos.cookie.periph != NULL))
2180 retval = DM_RET_DESCEND;
2181 else
2182 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2183 device);
2184
2185 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2186 cdm->status = CAM_DEV_MATCH_ERROR;
2187 return(0);
2188 }
2189
2190 /*
2191 * If the copy flag is set, copy this device out.
2192 */
2193 if (retval & DM_RET_COPY) {
2194 int spaceleft, j;
2195
2196 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2197 sizeof(struct dev_match_result));
2198
2199 /*
2200 * If we don't have enough space to put in another
2201 * match result, save our position and tell the
2202 * user there are more devices to check.
2203 */
2204 if (spaceleft < sizeof(struct dev_match_result)) {
2205 bzero(&cdm->pos, sizeof(cdm->pos));
2206 cdm->pos.position_type =
2207 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2208 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2209
2210 cdm->pos.cookie.bus = device->target->bus;
2211 cdm->pos.generations[CAM_BUS_GENERATION]=
2212 bus_generation;
2213 cdm->pos.cookie.target = device->target;
2214 cdm->pos.generations[CAM_TARGET_GENERATION] =
2215 device->target->bus->generation;
2216 cdm->pos.cookie.device = device;
2217 cdm->pos.generations[CAM_DEV_GENERATION] =
2218 device->target->generation;
2219 cdm->status = CAM_DEV_MATCH_MORE;
2220 return(0);
2221 }
2222 j = cdm->num_matches;
2223 cdm->num_matches++;
2224 cdm->matches[j].type = DEV_MATCH_DEVICE;
2225 cdm->matches[j].result.device_result.path_id =
2226 device->target->bus->path_id;
2227 cdm->matches[j].result.device_result.target_id =
2228 device->target->target_id;
2229 cdm->matches[j].result.device_result.target_lun =
2230 device->lun_id;
2231 bcopy(&device->inq_data,
2232 &cdm->matches[j].result.device_result.inq_data,
2233 sizeof(struct scsi_inquiry_data));
2234
2235 /* Let the user know whether this device is unconfigured */
2236 if (device->flags & CAM_DEV_UNCONFIGURED)
2237 cdm->matches[j].result.device_result.flags =
2238 DEV_RESULT_UNCONFIGURED;
2239 else
2240 cdm->matches[j].result.device_result.flags =
2241 DEV_RESULT_NOFLAG;
2242 }
2243
2244 /*
2245 * If the user isn't interested in peripherals, don't descend
2246 * the tree any further.
2247 */
2248 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2249 return(1);
2250
2251 /*
2252 * If there is a peripheral list generation recorded, make sure
2253 * it hasn't changed.
2254 */
2255 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2256 && (device->target->bus == cdm->pos.cookie.bus)
2257 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2258 && (device->target == cdm->pos.cookie.target)
2259 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2260 && (device == cdm->pos.cookie.device)
2261 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2262 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2263 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2264 device->generation)){
2265 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2266 return(0);
2267 }
2268
2269 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2270 && (cdm->pos.cookie.bus == device->target->bus)
2271 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2272 && (cdm->pos.cookie.target == device->target)
2273 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2274 && (cdm->pos.cookie.device == device)
2275 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2276 && (cdm->pos.cookie.periph != NULL))
2277 return(xptperiphtraverse(device,
2278 (struct cam_periph *)cdm->pos.cookie.periph,
2279 xptedtperiphfunc, arg));
2280 else
2281 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2282 }
2283
2284 static int
2285 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2286 {
2287 struct ccb_dev_match *cdm;
2288 dev_match_ret retval;
2289
2290 cdm = (struct ccb_dev_match *)arg;
2291
2292 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2293
2294 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2295 cdm->status = CAM_DEV_MATCH_ERROR;
2296 return(0);
2297 }
2298
2299 /*
2300 * If the copy flag is set, copy this peripheral out.
2301 */
2302 if (retval & DM_RET_COPY) {
2303 int spaceleft, j;
2304
2305 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2306 sizeof(struct dev_match_result));
2307
2308 /*
2309 * If we don't have enough space to put in another
2310 * match result, save our position and tell the
2311 * user there are more devices to check.
2312 */
2313 if (spaceleft < sizeof(struct dev_match_result)) {
2314 bzero(&cdm->pos, sizeof(cdm->pos));
2315 cdm->pos.position_type =
2316 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2317 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2318 CAM_DEV_POS_PERIPH;
2319
2320 cdm->pos.cookie.bus = periph->path->bus;
2321 cdm->pos.generations[CAM_BUS_GENERATION]=
2322 bus_generation;
2323 cdm->pos.cookie.target = periph->path->target;
2324 cdm->pos.generations[CAM_TARGET_GENERATION] =
2325 periph->path->bus->generation;
2326 cdm->pos.cookie.device = periph->path->device;
2327 cdm->pos.generations[CAM_DEV_GENERATION] =
2328 periph->path->target->generation;
2329 cdm->pos.cookie.periph = periph;
2330 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2331 periph->path->device->generation;
2332 cdm->status = CAM_DEV_MATCH_MORE;
2333 return(0);
2334 }
2335
2336 j = cdm->num_matches;
2337 cdm->num_matches++;
2338 cdm->matches[j].type = DEV_MATCH_PERIPH;
2339 cdm->matches[j].result.periph_result.path_id =
2340 periph->path->bus->path_id;
2341 cdm->matches[j].result.periph_result.target_id =
2342 periph->path->target->target_id;
2343 cdm->matches[j].result.periph_result.target_lun =
2344 periph->path->device->lun_id;
2345 cdm->matches[j].result.periph_result.unit_number =
2346 periph->unit_number;
2347 strncpy(cdm->matches[j].result.periph_result.periph_name,
2348 periph->periph_name, DEV_IDLEN);
2349 }
2350
2351 return(1);
2352 }
2353
2354 static int
2355 xptedtmatch(struct ccb_dev_match *cdm)
2356 {
2357 int ret;
2358
2359 cdm->num_matches = 0;
2360
2361 /*
2362 * Check the bus list generation. If it has changed, the user
2363 * needs to reset everything and start over.
2364 */
2365 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2366 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2367 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2368 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2369 return(0);
2370 }
2371
2372 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2373 && (cdm->pos.cookie.bus != NULL))
2374 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2375 xptedtbusfunc, cdm);
2376 else
2377 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2378
2379 /*
2380 * If we get back 0, that means that we had to stop before fully
2381 * traversing the EDT. It also means that one of the subroutines
2382 * has set the status field to the proper value. If we get back 1,
2383 * we've fully traversed the EDT and copied out any matching entries.
2384 */
2385 if (ret == 1)
2386 cdm->status = CAM_DEV_MATCH_LAST;
2387
2388 return(ret);
2389 }
2390
2391 static int
2392 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2393 {
2394 struct ccb_dev_match *cdm;
2395
2396 cdm = (struct ccb_dev_match *)arg;
2397
2398 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2399 && (cdm->pos.cookie.pdrv == pdrv)
2400 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2401 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2402 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2403 (*pdrv)->generation)) {
2404 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2405 return(0);
2406 }
2407
2408 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2409 && (cdm->pos.cookie.pdrv == pdrv)
2410 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2411 && (cdm->pos.cookie.periph != NULL))
2412 return(xptpdperiphtraverse(pdrv,
2413 (struct cam_periph *)cdm->pos.cookie.periph,
2414 xptplistperiphfunc, arg));
2415 else
2416 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2417 }
2418
2419 static int
2420 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2421 {
2422 struct ccb_dev_match *cdm;
2423 dev_match_ret retval;
2424
2425 cdm = (struct ccb_dev_match *)arg;
2426
2427 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2428
2429 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2430 cdm->status = CAM_DEV_MATCH_ERROR;
2431 return(0);
2432 }
2433
2434 /*
2435 * If the copy flag is set, copy this peripheral out.
2436 */
2437 if (retval & DM_RET_COPY) {
2438 int spaceleft, j;
2439
2440 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2441 sizeof(struct dev_match_result));
2442
2443 /*
2444 * If we don't have enough space to put in another
2445 * match result, save our position and tell the
2446 * user there are more devices to check.
2447 */
2448 if (spaceleft < sizeof(struct dev_match_result)) {
2449 struct periph_driver **pdrv;
2450
2451 pdrv = NULL;
2452 bzero(&cdm->pos, sizeof(cdm->pos));
2453 cdm->pos.position_type =
2454 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2455 CAM_DEV_POS_PERIPH;
2456
2457 /*
2458 * This may look a bit non-sensical, but it is
2459 * actually quite logical. There are very few
2460 * peripheral drivers, and bloating every peripheral
2461 * structure with a pointer back to its parent
2462 * peripheral driver linker set entry would cost
2463 * more in the long run than doing this quick lookup.
2464 */
2465 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2466 if (strcmp((*pdrv)->driver_name,
2467 periph->periph_name) == 0)
2468 break;
2469 }
2470
2471 if (*pdrv == NULL) {
2472 cdm->status = CAM_DEV_MATCH_ERROR;
2473 return(0);
2474 }
2475
2476 cdm->pos.cookie.pdrv = pdrv;
2477 /*
2478 * The periph generation slot does double duty, as
2479 * does the periph pointer slot. They are used for
2480 * both edt and pdrv lookups and positioning.
2481 */
2482 cdm->pos.cookie.periph = periph;
2483 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2484 (*pdrv)->generation;
2485 cdm->status = CAM_DEV_MATCH_MORE;
2486 return(0);
2487 }
2488
2489 j = cdm->num_matches;
2490 cdm->num_matches++;
2491 cdm->matches[j].type = DEV_MATCH_PERIPH;
2492 cdm->matches[j].result.periph_result.path_id =
2493 periph->path->bus->path_id;
2494
2495 /*
2496 * The transport layer peripheral doesn't have a target or
2497 * lun.
2498 */
2499 if (periph->path->target)
2500 cdm->matches[j].result.periph_result.target_id =
2501 periph->path->target->target_id;
2502 else
2503 cdm->matches[j].result.periph_result.target_id = -1;
2504
2505 if (periph->path->device)
2506 cdm->matches[j].result.periph_result.target_lun =
2507 periph->path->device->lun_id;
2508 else
2509 cdm->matches[j].result.periph_result.target_lun = -1;
2510
2511 cdm->matches[j].result.periph_result.unit_number =
2512 periph->unit_number;
2513 strncpy(cdm->matches[j].result.periph_result.periph_name,
2514 periph->periph_name, DEV_IDLEN);
2515 }
2516
2517 return(1);
2518 }
2519
2520 static int
2521 xptperiphlistmatch(struct ccb_dev_match *cdm)
2522 {
2523 int ret;
2524
2525 cdm->num_matches = 0;
2526
2527 /*
2528 * At this point in the edt traversal function, we check the bus
2529 * list generation to make sure that no busses have been added or
2530 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2531 * For the peripheral driver list traversal function, however, we
2532 * don't have to worry about new peripheral driver types coming or
2533 * going; they're in a linker set, and therefore can't change
2534 * without a recompile.
2535 */
2536
2537 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2538 && (cdm->pos.cookie.pdrv != NULL))
2539 ret = xptpdrvtraverse(
2540 (struct periph_driver **)cdm->pos.cookie.pdrv,
2541 xptplistpdrvfunc, cdm);
2542 else
2543 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2544
2545 /*
2546 * If we get back 0, that means that we had to stop before fully
2547 * traversing the peripheral driver tree. It also means that one of
2548 * the subroutines has set the status field to the proper value. If
2549 * we get back 1, we've fully traversed the EDT and copied out any
2550 * matching entries.
2551 */
2552 if (ret == 1)
2553 cdm->status = CAM_DEV_MATCH_LAST;
2554
2555 return(ret);
2556 }
2557
2558 static int
2559 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2560 {
2561 struct cam_eb *bus, *next_bus;
2562 int retval;
2563
2564 retval = 1;
2565
2566 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2567 bus != NULL;
2568 bus = next_bus) {
2569 next_bus = TAILQ_NEXT(bus, links);
2570
2571 retval = tr_func(bus, arg);
2572 if (retval == 0)
2573 return(retval);
2574 }
2575
2576 return(retval);
2577 }
2578
2579 static int
2580 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2581 xpt_targetfunc_t *tr_func, void *arg)
2582 {
2583 struct cam_et *target, *next_target;
2584 int retval;
2585
2586 retval = 1;
2587 for (target = (start_target ? start_target :
2588 TAILQ_FIRST(&bus->et_entries));
2589 target != NULL; target = next_target) {
2590
2591 next_target = TAILQ_NEXT(target, links);
2592
2593 retval = tr_func(target, arg);
2594
2595 if (retval == 0)
2596 return(retval);
2597 }
2598
2599 return(retval);
2600 }
2601
2602 static int
2603 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2604 xpt_devicefunc_t *tr_func, void *arg)
2605 {
2606 struct cam_ed *device, *next_device;
2607 int retval;
2608
2609 retval = 1;
2610 for (device = (start_device ? start_device :
2611 TAILQ_FIRST(&target->ed_entries));
2612 device != NULL;
2613 device = next_device) {
2614
2615 next_device = TAILQ_NEXT(device, links);
2616
2617 retval = tr_func(device, arg);
2618
2619 if (retval == 0)
2620 return(retval);
2621 }
2622
2623 return(retval);
2624 }
2625
2626 static int
2627 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2628 xpt_periphfunc_t *tr_func, void *arg)
2629 {
2630 struct cam_periph *periph, *next_periph;
2631 int retval;
2632
2633 retval = 1;
2634
2635 for (periph = (start_periph ? start_periph :
2636 SLIST_FIRST(&device->periphs));
2637 periph != NULL;
2638 periph = next_periph) {
2639
2640 next_periph = SLIST_NEXT(periph, periph_links);
2641
2642 retval = tr_func(periph, arg);
2643 if (retval == 0)
2644 return(retval);
2645 }
2646
2647 return(retval);
2648 }
2649
2650 static int
2651 xptpdrvtraverse(struct periph_driver **start_pdrv,
2652 xpt_pdrvfunc_t *tr_func, void *arg)
2653 {
2654 struct periph_driver **pdrv;
2655 int retval;
2656
2657 retval = 1;
2658
2659 /*
2660 * We don't traverse the peripheral driver list like we do the
2661 * other lists, because it is a linker set, and therefore cannot be
2662 * changed during runtime. If the peripheral driver list is ever
2663 * re-done to be something other than a linker set (i.e. it can
2664 * change while the system is running), the list traversal should
2665 * be modified to work like the other traversal functions.
2666 */
2667 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2668 *pdrv != NULL; pdrv++) {
2669 retval = tr_func(pdrv, arg);
2670
2671 if (retval == 0)
2672 return(retval);
2673 }
2674
2675 return(retval);
2676 }
2677
2678 static int
2679 xptpdperiphtraverse(struct periph_driver **pdrv,
2680 struct cam_periph *start_periph,
2681 xpt_periphfunc_t *tr_func, void *arg)
2682 {
2683 struct cam_periph *periph, *next_periph;
2684 int retval;
2685
2686 retval = 1;
2687
2688 for (periph = (start_periph ? start_periph :
2689 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2690 periph = next_periph) {
2691
2692 next_periph = TAILQ_NEXT(periph, unit_links);
2693
2694 retval = tr_func(periph, arg);
2695 if (retval == 0)
2696 return(retval);
2697 }
2698 return(retval);
2699 }
2700
2701 static int
2702 xptdefbusfunc(struct cam_eb *bus, void *arg)
2703 {
2704 struct xpt_traverse_config *tr_config;
2705
2706 tr_config = (struct xpt_traverse_config *)arg;
2707
2708 if (tr_config->depth == XPT_DEPTH_BUS) {
2709 xpt_busfunc_t *tr_func;
2710
2711 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2712
2713 return(tr_func(bus, tr_config->tr_arg));
2714 } else
2715 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2716 }
2717
2718 static int
2719 xptdeftargetfunc(struct cam_et *target, void *arg)
2720 {
2721 struct xpt_traverse_config *tr_config;
2722
2723 tr_config = (struct xpt_traverse_config *)arg;
2724
2725 if (tr_config->depth == XPT_DEPTH_TARGET) {
2726 xpt_targetfunc_t *tr_func;
2727
2728 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2729
2730 return(tr_func(target, tr_config->tr_arg));
2731 } else
2732 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2733 }
2734
2735 static int
2736 xptdefdevicefunc(struct cam_ed *device, void *arg)
2737 {
2738 struct xpt_traverse_config *tr_config;
2739
2740 tr_config = (struct xpt_traverse_config *)arg;
2741
2742 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2743 xpt_devicefunc_t *tr_func;
2744
2745 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2746
2747 return(tr_func(device, tr_config->tr_arg));
2748 } else
2749 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2750 }
2751
2752 static int
2753 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2754 {
2755 struct xpt_traverse_config *tr_config;
2756 xpt_periphfunc_t *tr_func;
2757
2758 tr_config = (struct xpt_traverse_config *)arg;
2759
2760 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2761
2762 /*
2763 * Unlike the other default functions, we don't check for depth
2764 * here. The peripheral driver level is the last level in the EDT,
2765 * so if we're here, we should execute the function in question.
2766 */
2767 return(tr_func(periph, tr_config->tr_arg));
2768 }
2769
2770 /*
2771 * Execute the given function for every bus in the EDT.
2772 */
2773 static int
2774 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2775 {
2776 struct xpt_traverse_config tr_config;
2777
2778 tr_config.depth = XPT_DEPTH_BUS;
2779 tr_config.tr_func = tr_func;
2780 tr_config.tr_arg = arg;
2781
2782 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2783 }
2784
2785 #ifdef notusedyet
2786 /*
2787 * Execute the given function for every target in the EDT.
2788 */
2789 static int
2790 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2791 {
2792 struct xpt_traverse_config tr_config;
2793
2794 tr_config.depth = XPT_DEPTH_TARGET;
2795 tr_config.tr_func = tr_func;
2796 tr_config.tr_arg = arg;
2797
2798 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2799 }
2800 #endif /* notusedyet */
2801
2802 /*
2803 * Execute the given function for every device in the EDT.
2804 */
2805 static int
2806 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2807 {
2808 struct xpt_traverse_config tr_config;
2809
2810 tr_config.depth = XPT_DEPTH_DEVICE;
2811 tr_config.tr_func = tr_func;
2812 tr_config.tr_arg = arg;
2813
2814 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2815 }
2816
2817 #ifdef notusedyet
2818 /*
2819 * Execute the given function for every peripheral in the EDT.
2820 */
2821 static int
2822 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2823 {
2824 struct xpt_traverse_config tr_config;
2825
2826 tr_config.depth = XPT_DEPTH_PERIPH;
2827 tr_config.tr_func = tr_func;
2828 tr_config.tr_arg = arg;
2829
2830 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2831 }
2832 #endif /* notusedyet */
2833
2834 static int
2835 xptsetasyncfunc(struct cam_ed *device, void *arg)
2836 {
2837 struct cam_path path;
2838 struct ccb_getdev cgd;
2839 struct async_node *cur_entry;
2840
2841 cur_entry = (struct async_node *)arg;
2842
2843 /*
2844 * Don't report unconfigured devices (Wildcard devs,
2845 * devices only for target mode, device instances
2846 * that have been invalidated but are waiting for
2847 * their last reference count to be released).
2848 */
2849 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2850 return (1);
2851
2852 xpt_compile_path(&path,
2853 NULL,
2854 device->target->bus->path_id,
2855 device->target->target_id,
2856 device->lun_id);
2857 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2858 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2859 xpt_action((union ccb *)&cgd);
2860 cur_entry->callback(cur_entry->callback_arg,
2861 AC_FOUND_DEVICE,
2862 &path, &cgd);
2863 xpt_release_path(&path);
2864
2865 return(1);
2866 }
2867
2868 static int
2869 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2870 {
2871 struct cam_path path;
2872 struct ccb_pathinq cpi;
2873 struct async_node *cur_entry;
2874
2875 cur_entry = (struct async_node *)arg;
2876
2877 xpt_compile_path(&path, /*periph*/NULL,
2878 bus->sim->path_id,
2879 CAM_TARGET_WILDCARD,
2880 CAM_LUN_WILDCARD);
2881 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2882 cpi.ccb_h.func_code = XPT_PATH_INQ;
2883 xpt_action((union ccb *)&cpi);
2884 cur_entry->callback(cur_entry->callback_arg,
2885 AC_PATH_REGISTERED,
2886 &path, &cpi);
2887 xpt_release_path(&path);
2888
2889 return(1);
2890 }
2891
2892 void
2893 xpt_action(union ccb *start_ccb)
2894 {
2895 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2896
2897 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2898
2899 crit_enter();
2900
2901 switch (start_ccb->ccb_h.func_code) {
2902 case XPT_SCSI_IO:
2903 {
2904 struct cam_ed *device;
2905 #ifdef CAMDEBUG
2906 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
2907 struct cam_path *path;
2908
2909 path = start_ccb->ccb_h.path;
2910 #endif
2911
2912 /*
2913 * For the sake of compatibility with SCSI-1
2914 * devices that may not understand the identify
2915 * message, we include lun information in the
2916 * second byte of all commands. SCSI-1 specifies
2917 * that luns are a 3 bit value and reserves only 3
2918 * bits for lun information in the CDB. Later
2919 * revisions of the SCSI spec allow for more than 8
2920 * luns, but have deprecated lun information in the
2921 * CDB. So, if the lun won't fit, we must omit.
2922 *
2923 * Also be aware that during initial probing for devices,
2924 * the inquiry information is unknown but initialized to 0.
2925 * This means that this code will be exercised while probing
2926 * devices with an ANSI revision greater than 2.
2927 */
2928 device = start_ccb->ccb_h.path->device;
2929 if (device->protocol_version <= SCSI_REV_2
2930 && start_ccb->ccb_h.target_lun < 8
2931 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2932
2933 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2934 start_ccb->ccb_h.target_lun << 5;
2935 }
2936 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2937 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
2938 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
2939 &path->device->inq_data),
2940 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
2941 cdb_str, sizeof(cdb_str))));
2942 /* FALLTHROUGH */
2943 }
2944 case XPT_TARGET_IO:
2945 case XPT_CONT_TARGET_IO:
2946 start_ccb->csio.sense_resid = 0;
2947 start_ccb->csio.resid = 0;
2948 /* FALLTHROUGH */
2949 case XPT_RESET_DEV:
2950 case XPT_ENG_EXEC:
2951 {
2952 struct cam_path *path;
2953 struct cam_sim *sim;
2954 int runq;
2955
2956 path = start_ccb->ccb_h.path;
2957
2958 sim = path->bus->sim;
2959 if (SIM_DEAD(sim)) {
2960 /* The SIM has gone; just execute the CCB directly. */
2961 cam_ccbq_send_ccb(&path->device->ccbq, start_ccb);
2962 (*(sim->sim_action))(sim, start_ccb);
2963 break;
2964 }
2965
2966 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2967 if (path->device->qfrozen_cnt == 0)
2968 runq = xpt_schedule_dev_sendq(path->bus, path->device);
2969 else
2970 runq = 0;
2971 if (runq != 0)
2972 xpt_run_dev_sendq(path->bus);
2973 break;
2974 }
2975 case XPT_SET_TRAN_SETTINGS:
2976 {
2977 xpt_set_transfer_settings(&start_ccb->cts,
2978 start_ccb->ccb_h.path->device,
2979 /*async_update*/FALSE);
2980 break;
2981 }
2982 case XPT_CALC_GEOMETRY:
2983 {
2984 struct cam_sim *sim;
2985
2986 /* Filter out garbage */
2987 if (start_ccb->ccg.block_size == 0
2988 || start_ccb->ccg.volume_size == 0) {
2989 start_ccb->ccg.cylinders = 0;
2990 start_ccb->ccg.heads = 0;
2991 start_ccb->ccg.secs_per_track = 0;
2992 start_ccb->ccb_h.status = CAM_REQ_CMP;
2993 break;
2994 }
2995 sim = start_ccb->ccb_h.path->bus->sim;
2996 (*(sim->sim_action))(sim, start_ccb);
2997 break;
2998 }
2999 case XPT_ABORT:
3000 {
3001 union ccb* abort_ccb;
3002
3003 abort_ccb = start_ccb->cab.abort_ccb;
3004 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
3005
3006 if (abort_ccb->ccb_h.pinfo.index >= 0) {
3007 struct cam_ccbq *ccbq;
3008
3009 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
3010 cam_ccbq_remove_ccb(ccbq, abort_ccb);
3011 abort_ccb->ccb_h.status =
3012 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3013 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3014 xpt_done(abort_ccb);
3015 start_ccb->ccb_h.status = CAM_REQ_CMP;
3016 break;
3017 }
3018 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
3019 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
3020 /*
3021 * We've caught this ccb en route to
3022 * the SIM. Flag it for abort and the
3023 * SIM will do so just before starting
3024 * real work on the CCB.
3025 */
3026 abort_ccb->ccb_h.status =
3027 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3028 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3029 start_ccb->ccb_h.status = CAM_REQ_CMP;
3030 break;
3031 }
3032 }
3033 if (XPT_FC_IS_QUEUED(abort_ccb)
3034 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
3035 /*
3036 * It's already completed but waiting
3037 * for our SWI to get to it.
3038 */
3039 start_ccb->ccb_h.status = CAM_UA_ABORT;
3040 break;
3041 }
3042 /*
3043 * If we weren't able to take care of the abort request
3044 * in the XPT, pass the request down to the SIM for processing.
3045 */
3046 /* FALLTHROUGH */
3047 }
3048 case XPT_ACCEPT_TARGET_IO:
3049 case XPT_EN_LUN:
3050 case XPT_IMMED_NOTIFY:
3051 case XPT_NOTIFY_ACK:
3052 case XPT_GET_TRAN_SETTINGS:
3053 case XPT_RESET_BUS:
3054 {
3055 struct cam_sim *sim;
3056
3057 sim = start_ccb->ccb_h.path->bus->sim;
3058 (*(sim->sim_action))(sim, start_ccb);
3059 break;
3060 }
3061 case XPT_PATH_INQ:
3062 {
3063 struct cam_sim *sim;
3064
3065 sim = start_ccb->ccb_h.path->bus->sim;
3066 (*(sim->sim_action))(sim, start_ccb);
3067 break;
3068 }
3069 case XPT_PATH_STATS:
3070 start_ccb->cpis.last_reset =
3071 start_ccb->ccb_h.path->bus->last_reset;
3072 start_ccb->ccb_h.status = CAM_REQ_CMP;
3073 break;
3074 case XPT_GDEV_TYPE:
3075 {
3076 struct cam_ed *dev;
3077
3078 dev = start_ccb->ccb_h.path->device;
3079 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3080 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3081 } else {
3082 struct ccb_getdev *cgd;
3083 struct cam_eb *bus;
3084 struct cam_et *tar;
3085
3086 cgd = &start_ccb->cgd;
3087 bus = cgd->ccb_h.path->bus;
3088 tar = cgd->ccb_h.path->target;
3089 cgd->inq_data = dev->inq_data;
3090 cgd->ccb_h.status = CAM_REQ_CMP;
3091 cgd->serial_num_len = dev->serial_num_len;
3092 if ((dev->serial_num_len > 0)
3093 && (dev->serial_num != NULL))
3094 bcopy(dev->serial_num, cgd->serial_num,
3095 dev->serial_num_len);
3096 }
3097 break;
3098 }
3099 case XPT_GDEV_STATS:
3100 {
3101 struct cam_ed *dev;
3102
3103 dev = start_ccb->ccb_h.path->device;
3104 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3105 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3106 } else {
3107 struct ccb_getdevstats *cgds;
3108 struct cam_eb *bus;
3109 struct cam_et *tar;
3110
3111 cgds = &start_ccb->cgds;
3112 bus = cgds->ccb_h.path->bus;
3113 tar = cgds->ccb_h.path->target;
3114 cgds->dev_openings = dev->ccbq.dev_openings;
3115 cgds->dev_active = dev->ccbq.dev_active;
3116 cgds->devq_openings = dev->ccbq.devq_openings;
3117 cgds->devq_queued = dev->ccbq.queue.entries;
3118 cgds->held = dev->ccbq.held;
3119 cgds->last_reset = tar->last_reset;
3120 cgds->maxtags = dev->quirk->maxtags;
3121 cgds->mintags = dev->quirk->mintags;
3122 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3123 cgds->last_reset = bus->last_reset;
3124 cgds->ccb_h.status = CAM_REQ_CMP;
3125 }
3126 break;
3127 }
3128 case XPT_GDEVLIST:
3129 {
3130 struct cam_periph *nperiph;
3131 struct periph_list *periph_head;
3132 struct ccb_getdevlist *cgdl;
3133 u_int i;
3134 struct cam_ed *device;
3135 int found;
3136
3137
3138 found = 0;
3139
3140 /*
3141 * Don't want anyone mucking with our data.
3142 */
3143 device = start_ccb->ccb_h.path->device;
3144 periph_head = &device->periphs;
3145 cgdl = &start_ccb->cgdl;
3146
3147 /*
3148 * Check and see if the list has changed since the user
3149 * last requested a list member. If so, tell them that the
3150 * list has changed, and therefore they need to start over
3151 * from the beginning.
3152 */
3153 if ((cgdl->index != 0) &&
3154 (cgdl->generation != device->generation)) {
3155 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3156 break;
3157 }
3158
3159 /*
3160 * Traverse the list of peripherals and attempt to find
3161 * the requested peripheral.
3162 */
3163 for (nperiph = SLIST_FIRST(periph_head), i = 0;
3164 (nperiph != NULL) && (i <= cgdl->index);
3165 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
3166 if (i == cgdl->index) {
3167 strncpy(cgdl->periph_name,
3168 nperiph->periph_name,
3169 DEV_IDLEN);
3170 cgdl->unit_number = nperiph->unit_number;
3171 found = 1;
3172 }
3173 }
3174 if (found == 0) {
3175 cgdl->status = CAM_GDEVLIST_ERROR;
3176 break;
3177 }
3178
3179 if (nperiph == NULL)
3180 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3181 else
3182 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3183
3184 cgdl->index++;
3185 cgdl->generation = device->generation;
3186
3187 cgdl->ccb_h.status = CAM_REQ_CMP;
3188 break;
3189 }
3190 case XPT_DEV_MATCH:
3191 {
3192 dev_pos_type position_type;
3193 struct ccb_dev_match *cdm;
3194 int ret;
3195
3196 cdm = &start_ccb->cdm;
3197
3198 /*
3199 * Prevent EDT changes while we traverse it.
3200 */
3201 /*
3202 * There are two ways of getting at information in the EDT.
3203 * The first way is via the primary EDT tree. It starts
3204 * with a list of busses, then a list of targets on a bus,
3205 * then devices/luns on a target, and then peripherals on a
3206 * device/lun. The "other" way is by the peripheral driver
3207 * lists. The peripheral driver lists are organized by
3208 * peripheral driver. (obviously) So it makes sense to
3209 * use the peripheral driver list if the user is looking
3210 * for something like "da1", or all "da" devices. If the
3211 * user is looking for something on a particular bus/target
3212 * or lun, it's generally better to go through the EDT tree.
3213 */
3214
3215 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3216 position_type = cdm->pos.position_type;
3217 else {
3218 u_int i;
3219
3220 position_type = CAM_DEV_POS_NONE;
3221
3222 for (i = 0; i < cdm->num_patterns; i++) {
3223 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3224 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3225 position_type = CAM_DEV_POS_EDT;
3226 break;
3227 }
3228 }
3229
3230 if (cdm->num_patterns == 0)
3231 position_type = CAM_DEV_POS_EDT;
3232 else if (position_type == CAM_DEV_POS_NONE)
3233 position_type = CAM_DEV_POS_PDRV;
3234 }
3235
3236 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3237 case CAM_DEV_POS_EDT:
3238 ret = xptedtmatch(cdm);
3239 break;
3240 case CAM_DEV_POS_PDRV:
3241 ret = xptperiphlistmatch(cdm);
3242 break;
3243 default:
3244 cdm->status = CAM_DEV_MATCH_ERROR;
3245 break;
3246 }
3247
3248 if (cdm->status == CAM_DEV_MATCH_ERROR)
3249 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3250 else
3251 start_ccb->ccb_h.status = CAM_REQ_CMP;
3252
3253 break;
3254 }
3255 case XPT_SASYNC_CB:
3256 {
3257 struct ccb_setasync *csa;
3258 struct async_node *cur_entry;
3259 struct async_list *async_head;
3260 u_int32_t added;
3261
3262 csa = &start_ccb->csa;
3263 added = csa->event_enable;
3264 async_head = &csa->ccb_h.path->device->asyncs;
3265
3266 /*
3267 * If there is already an entry for us, simply
3268 * update it.
3269 */
3270 cur_entry = SLIST_FIRST(async_head);
3271 while (cur_entry != NULL) {
3272 if ((cur_entry->callback_arg == csa->callback_arg)
3273 && (cur_entry->callback == csa->callback))
3274 break;
3275 cur_entry = SLIST_NEXT(cur_entry, links);
3276 }
3277
3278 if (cur_entry != NULL) {
3279 /*
3280 * If the request has no flags set,
3281 * remove the entry.
3282 */
3283 added &= ~cur_entry->event_enable;
3284 if (csa->event_enable == 0) {
3285 SLIST_REMOVE(async_head, cur_entry,
3286 async_node, links);
3287 csa->ccb_h.path->device->refcount--;
3288 kfree(cur_entry, M_CAMXPT);
3289 } else {
3290 cur_entry->event_enable = csa->event_enable;
3291 }
3292 } else {
3293 cur_entry = kmalloc(sizeof(*cur_entry),
3294 M_CAMXPT, M_INTWAIT);
3295 cur_entry->event_enable = csa->event_enable;
3296 cur_entry->callback_arg = csa->callback_arg;
3297 cur_entry->callback = csa->callback;
3298 SLIST_INSERT_HEAD(async_head, cur_entry, links);
3299 csa->ccb_h.path->device->refcount++;
3300 }
3301
3302 if ((added & AC_FOUND_DEVICE) != 0) {
3303 /*
3304 * Get this peripheral up to date with all
3305 * the currently existing devices.
3306 */
3307 xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3308 }
3309 if ((added & AC_PATH_REGISTERED) != 0) {
3310 /*
3311 * Get this peripheral up to date with all
3312 * the currently existing busses.
3313 */
3314 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3315 }
3316 start_ccb->ccb_h.status = CAM_REQ_CMP;
3317 break;
3318 }
3319 case XPT_REL_SIMQ:
3320 {
3321 struct ccb_relsim *crs;
3322 struct cam_ed *dev;
3323
3324 crs = &start_ccb->crs;
3325 dev = crs->ccb_h.path->device;
3326 if (dev == NULL) {
3327
3328 crs->ccb_h.status = CAM_DEV_NOT_THERE;
3329 break;
3330 }
3331
3332 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3333
3334 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) {
3335 /* Don't ever go below one opening */
3336 if (crs->openings > 0) {
3337 xpt_dev_ccbq_resize(crs->ccb_h.path,
3338 crs->openings);
3339
3340 if (bootverbose) {
3341 xpt_print_path(crs->ccb_h.path);
3342 kprintf("tagged openings "
3343 "now %d\n",
3344 crs->openings);
3345 }
3346 }
3347 }
3348 }
3349
3350 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3351
3352 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3353
3354 /*
3355 * Just extend the old timeout and decrement
3356 * the freeze count so that a single timeout
3357 * is sufficient for releasing the queue.
3358 */
3359 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3360 callout_stop(&dev->c_handle);
3361 } else {
3362
3363 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3364 }
3365
3366 callout_reset(&dev->c_handle,
3367 (crs->release_timeout * hz) / 1000,
3368 xpt_release_devq_timeout, dev);
3369
3370 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3371
3372 }
3373
3374 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3375
3376 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3377 /*
3378 * Decrement the freeze count so that a single
3379 * completion is still sufficient to unfreeze
3380 * the queue.
3381 */
3382 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3383 } else {
3384
3385 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3386 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3387 }
3388 }
3389
3390 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3391
3392 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3393 || (dev->ccbq.dev_active == 0)) {
3394
3395 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3396 } else {
3397
3398 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3399 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3400 }
3401 }
3402
3403 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3404
3405 xpt_release_devq(crs->ccb_h.path, /*count*/1,
3406 /*run_queue*/TRUE);
3407 }
3408 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3409 start_ccb->ccb_h.status = CAM_REQ_CMP;
3410 break;
3411 }
3412 case XPT_SCAN_BUS:
3413 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3414 break;
3415 case XPT_SCAN_LUN:
3416 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3417 start_ccb->ccb_h.path, start_ccb->crcn.flags,
3418 start_ccb);
3419 break;
3420 case XPT_DEBUG: {
3421 #ifdef CAMDEBUG
3422 #ifdef CAM_DEBUG_DELAY
3423 cam_debug_delay = CAM_DEBUG_DELAY;
3424 #endif
3425 cam_dflags = start_ccb->cdbg.flags;
3426 if (cam_dpath != NULL) {
3427 xpt_free_path(cam_dpath);
3428 cam_dpath = NULL;
3429 }
3430
3431 if (cam_dflags != CAM_DEBUG_NONE) {
3432 if (xpt_create_path(&cam_dpath, xpt_periph,
3433 start_ccb->ccb_h.path_id,
3434 start_ccb->ccb_h.target_id,
3435 start_ccb->ccb_h.target_lun) !=
3436 CAM_REQ_CMP) {
3437 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3438 cam_dflags = CAM_DEBUG_NONE;
3439 } else {
3440 start_ccb->ccb_h.status = CAM_REQ_CMP;
3441 xpt_print_path(cam_dpath);
3442 kprintf("debugging flags now %x\n", cam_dflags);
3443 }
3444 } else {
3445 cam_dpath = NULL;
3446 start_ccb->ccb_h.status = CAM_REQ_CMP;
3447 }
3448 #else /* !CAMDEBUG */
3449 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3450 #endif /* CAMDEBUG */
3451 break;
3452 }
3453 case XPT_NOOP:
3454 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3455 xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3456 start_ccb->ccb_h.status = CAM_REQ_CMP;
3457 break;
3458 default:
3459 case XPT_SDEV_TYPE:
3460 case XPT_TERM_IO:
3461 case XPT_ENG_INQ:
3462 /* XXX Implement */
3463 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3464 break;
3465 }
3466 crit_exit();
3467 }
3468
3469 void
3470 xpt_polled_action(union ccb *start_ccb)
3471 {
3472 u_int32_t timeout;
3473 struct cam_sim *sim;
3474 struct cam_devq *devq;
3475 struct cam_ed *dev;
3476
3477 timeout = start_ccb->ccb_h.timeout;
3478 sim = start_ccb->ccb_h.path->bus->sim;
3479 devq = sim->devq;
3480 dev = start_ccb->ccb_h.path->device;
3481
3482 crit_enter();
3483
3484 /*
3485 * Steal an opening so that no other queued requests
3486 * can get it before us while we simulate interrupts.
3487 */
3488 dev->ccbq.devq_openings--;
3489 dev->ccbq.dev_openings--;
3490
3491 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0)
3492 && (--timeout > 0)) {
3493 DELAY(1000);
3494 (*(sim->sim_poll))(sim);
3495 swi_cambio(NULL, NULL);
3496 }
3497
3498 dev->ccbq.devq_openings++;
3499 dev->ccbq.dev_openings++;
3500
3501 if (timeout != 0) {
3502 xpt_action(start_ccb);
3503 while(--timeout > 0) {
3504 (*(sim->sim_poll))(sim);
3505 swi_cambio(NULL, NULL);
3506 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3507 != CAM_REQ_INPROG)
3508 break;
3509 DELAY(1000);
3510 }
3511 if (timeout == 0) {
3512 /*
3513 * XXX Is it worth adding a sim_timeout entry
3514 * point so we can attempt recovery? If
3515 * this is only used for dumps, I don't think
3516 * it is.
3517 */
3518 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3519 }
3520 } else {
3521 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3522 }
3523 crit_exit();
3524 }
3525
3526 /*
3527 * Schedule a peripheral driver to receive a ccb when it's
3528 * target device has space for more transactions.
3529 */
3530 void
3531 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3532 {
3533 struct cam_ed *device;
3534 union ccb *work_ccb;
3535 int runq;
3536
3537 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3538 device = perph->path->device;
3539 crit_enter();
3540 if (periph_is_queued(perph)) {
3541 /* Simply reorder based on new priority */
3542 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3543 (" change priority to %d\n", new_priority));
3544 if (new_priority < perph->pinfo.priority) {
3545 camq_change_priority(&device->drvq,
3546 perph->pinfo.index,
3547 new_priority);
3548 }
3549 runq = 0;
3550 } else if (SIM_DEAD(perph->path->bus->sim)) {
3551 /* The SIM is gone so just call periph_start directly. */
3552 work_ccb = xpt_get_ccb(perph->path->device);
3553 crit_exit();
3554 if (work_ccb == NULL)
3555 return; /* XXX */
3556 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority);
3557 perph->pinfo.priority = new_priority;
3558 perph->periph_start(perph, work_ccb);
3559 return;
3560 } else {
3561 /* New entry on the queue */
3562 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3563 (" added periph to queue\n"));
3564 perph->pinfo.priority = new_priority;
3565 perph->pinfo.generation = ++device->drvq.generation;
3566 camq_insert(&device->drvq, &perph->pinfo);
3567 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3568 }
3569 crit_exit();
3570 if (runq != 0) {
3571 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3572 (" calling xpt_run_devq\n"));
3573 xpt_run_dev_allocq(perph->path->bus);
3574 }
3575 }
3576
3577
3578 /*
3579 * Schedule a device to run on a given queue.
3580 * If the device was inserted as a new entry on the queue,
3581 * return 1 meaning the device queue should be run. If we
3582 * were already queued, implying someone else has already
3583 * started the queue, return 0 so the caller doesn't attempt
3584 * to run the queue. Must be run in a critical section.
3585 */
3586 static int
3587 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3588 u_int32_t new_priority)
3589 {
3590 int retval;
3591 u_int32_t old_priority;
3592
3593 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3594
3595 old_priority = pinfo->priority;
3596
3597 /*
3598 * Are we already queued?
3599 */
3600 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3601 /* Simply reorder based on new priority */
3602 if (new_priority < old_priority) {
3603 camq_change_priority(queue, pinfo->index,
3604 new_priority);
3605 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3606 ("changed priority to %d\n",
3607 new_priority));
3608 }
3609 retval = 0;
3610 } else {
3611 /* New entry on the queue */
3612 if (new_priority < old_priority)
3613 pinfo->priority = new_priority;
3614
3615 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3616 ("Inserting onto queue\n"));
3617 pinfo->generation = ++queue->generation;
3618 camq_insert(queue, pinfo);
3619 retval = 1;
3620 }
3621 return (retval);
3622 }
3623
3624 static void
3625 xpt_run_dev_allocq(struct cam_eb *bus)
3626 {
3627 struct cam_devq *devq;
3628
3629 if ((devq = bus->sim->devq) == NULL) {
3630 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n"));
3631 return;
3632 }
3633 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3634
3635 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3636 (" qfrozen_cnt == 0x%x, entries == %d, "
3637 "openings == %d, active == %d\n",
3638 devq->alloc_queue.qfrozen_cnt,
3639 devq->alloc_queue.entries,
3640 devq->alloc_openings,
3641 devq->alloc_active));
3642
3643 crit_enter();
3644 devq->alloc_queue.qfrozen_cnt++;
3645 while ((devq->alloc_queue.entries > 0)
3646 && (devq->alloc_openings > 0)
3647 && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3648 struct cam_ed_qinfo *qinfo;
3649 struct cam_ed *device;
3650 union ccb *work_ccb;
3651 struct cam_periph *drv;
3652 struct camq *drvq;
3653
3654 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3655 CAMQ_HEAD);
3656 device = qinfo->device;
3657
3658 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3659 ("running device %p\n", device));
3660
3661 drvq = &device->drvq;
3662
3663 #ifdef CAMDEBUG
3664 if (drvq->entries <= 0) {
3665 panic("xpt_run_dev_allocq: "
3666 "Device on queue without any work to do");
3667 }
3668 #endif
3669 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3670 devq->alloc_openings--;
3671 devq->alloc_active++;
3672 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3673 crit_exit();
3674 xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3675 drv->pinfo.priority);
3676 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3677 ("calling periph start\n"));
3678 drv->periph_start(drv, work_ccb);
3679 } else {
3680 /*
3681 * Malloc failure in alloc_ccb
3682 */
3683 /*
3684 * XXX add us to a list to be run from free_ccb
3685 * if we don't have any ccbs active on this
3686 * device queue otherwise we may never get run
3687 * again.
3688 */
3689 break;
3690 }
3691
3692 /* Raise IPL for possible insertion and test at top of loop */
3693 crit_enter();
3694
3695 if (drvq->entries > 0) {
3696 /* We have more work. Attempt to reschedule */
3697 xpt_schedule_dev_allocq(bus, device);
3698 }
3699 }
3700 devq->alloc_queue.qfrozen_cnt--;
3701 crit_exit();
3702 }
3703
3704 static void
3705 xpt_run_dev_sendq(struct cam_eb *bus)
3706 {
3707 struct cam_devq *devq;
3708
3709 if ((devq = bus->sim->devq) == NULL) {
3710 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n"));
3711 return;
3712 }
3713 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3714
3715 crit_enter();
3716 devq->send_queue.qfrozen_cnt++;
3717 while ((devq->send_queue.entries > 0)
3718 && (devq->send_openings > 0)) {
3719 struct cam_ed_qinfo *qinfo;
3720 struct cam_ed *device;
3721 union ccb *work_ccb;
3722 struct cam_sim *sim;
3723
3724 if (devq->send_queue.qfrozen_cnt > 1) {
3725 break;
3726 }
3727
3728 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3729 CAMQ_HEAD);
3730 device = qinfo->device;
3731
3732 /*
3733 * If the device has been "frozen", don't attempt
3734 * to run it.
3735 */
3736 if (device->qfrozen_cnt > 0) {
3737 continue;
3738 }
3739
3740 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3741 ("running device %p\n", device));
3742
3743 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3744 if (work_ccb == NULL) {
3745 kprintf("device on run queue with no ccbs???\n");
3746 continue;
3747 }
3748
3749 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3750
3751 if (num_highpower <= 0) {
3752 /*
3753 * We got a high power command, but we
3754 * don't have any available slots. Freeze
3755 * the device queue until we have a slot
3756 * available.
3757 */
3758 device->qfrozen_cnt++;
3759 STAILQ_INSERT_TAIL(&highpowerq,
3760 &work_ccb->ccb_h,
3761 xpt_links.stqe);
3762
3763 continue;
3764 } else {
3765 /*
3766 * Consume a high power slot while
3767 * this ccb runs.
3768 */
3769 num_highpower--;
3770 }
3771 }
3772 devq->active_dev = device;
3773 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3774
3775 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3776
3777 devq->send_openings--;
3778 devq->send_active++;
3779
3780 if (device->ccbq.queue.entries > 0)
3781 xpt_schedule_dev_sendq(bus, device);
3782
3783 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3784 /*
3785 * The client wants to freeze the queue
3786 * after this CCB is sent.
3787 */
3788 device->qfrozen_cnt++;
3789 }
3790
3791 /* In Target mode, the peripheral driver knows best... */
3792 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3793 if ((device->inq_flags & SID_CmdQue) != 0
3794 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3795 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3796 else
3797 /*
3798 * Clear this in case of a retried CCB that
3799 * failed due to a rejected tag.
3800 */
3801 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3802 }
3803
3804 /*
3805 * Device queues can be shared among multiple sim instances
3806 * that reside on different busses. Use the SIM in the queue
3807 * CCB's path, rather than the one in the bus that was passed
3808 * into this function.
3809 */
3810 sim = work_ccb->ccb_h.path->bus->sim;
3811 (*(sim->sim_action))(sim, work_ccb);
3812
3813 devq->active_dev = NULL;
3814 /* Raise IPL for possible insertion and test at top of loop */
3815 }
3816 devq->send_queue.qfrozen_cnt--;
3817 crit_exit();
3818 }
3819
3820 /*
3821 * This function merges stuff from the slave ccb into the master ccb, while
3822 * keeping important fields in the master ccb constant.
3823 */
3824 void
3825 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3826 {
3827 /*
3828 * Pull fields that are valid for peripheral drivers to set
3829 * into the master CCB along with the CCB "payload".
3830 */
3831 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3832 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3833 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3834 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3835 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3836 sizeof(union ccb) - sizeof(struct ccb_hdr));
3837 }
3838
3839 void
3840 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3841 {
3842 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3843 callout_init(&ccb_h->timeout_ch);
3844 ccb_h->pinfo.priority = priority;
3845 ccb_h->path = path;
3846 ccb_h->path_id = path->bus->path_id;
3847 if (path->target)
3848 ccb_h->target_id = path->target->target_id;
3849 else
3850 ccb_h->target_id = CAM_TARGET_WILDCARD;
3851 if (path->device) {
3852 ccb_h->target_lun = path->device->lun_id;
3853 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3854 } else {
3855 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3856 }
3857 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3858 ccb_h->flags = 0;
3859 }
3860
3861 /* Path manipulation functions */
3862 cam_status
3863 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3864 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3865 {
3866 struct cam_path *path;
3867 cam_status status;
3868
3869 path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT);
3870 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3871 if (status != CAM_REQ_CMP) {
3872 kfree(path, M_CAMXPT);
3873 path = NULL;
3874 }
3875 *new_path_ptr = path;
3876 return (status);
3877 }
3878
3879 static cam_status
3880 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3881 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3882 {
3883 struct cam_eb *bus;
3884 struct cam_et *target;
3885 struct cam_ed *device;
3886 cam_status status;
3887
3888 status = CAM_REQ_CMP; /* Completed without error */
3889 target = NULL; /* Wildcarded */
3890 device = NULL; /* Wildcarded */
3891
3892 /*
3893 * We will potentially modify the EDT, so block interrupts
3894 * that may attempt to create cam paths.
3895 */
3896 crit_enter();
3897 bus = xpt_find_bus(path_id);
3898 if (bus == NULL) {
3899 status = CAM_PATH_INVALID;
3900 } else {
3901 target = xpt_find_target(bus, target_id);
3902 if (target == NULL) {
3903 /* Create one */
3904 struct cam_et *new_target;
3905
3906 new_target = xpt_alloc_target(bus, target_id);
3907 if (new_target == NULL) {
3908 status = CAM_RESRC_UNAVAIL;
3909 } else {
3910 target = new_target;
3911 }
3912 }
3913 if (target != NULL) {
3914 device = xpt_find_device(target, lun_id);
3915 if (device == NULL) {
3916 /* Create one */
3917 struct cam_ed *new_device;
3918
3919 new_device = xpt_alloc_device(bus,
3920 target,
3921 lun_id);
3922 if (new_device == NULL) {
3923 status = CAM_RESRC_UNAVAIL;
3924 } else {
3925 device = new_device;
3926 }
3927 }
3928 }
3929 }
3930 crit_exit();
3931
3932 /*
3933 * Only touch the user's data if we are successful.
3934 */
3935 if (status == CAM_REQ_CMP) {
3936 new_path->periph = perph;
3937 new_path->bus = bus;
3938 new_path->target = target;
3939 new_path->device = device;
3940 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3941 } else {
3942 if (device != NULL)
3943 xpt_release_device(bus, target, device);
3944 if (target != NULL)
3945 xpt_release_target(bus, target);
3946 if (bus != NULL)
3947 xpt_release_bus(bus);
3948 }
3949 return (status);
3950 }
3951
3952 static void
3953 xpt_release_path(struct cam_path *path)
3954 {
3955 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3956 if (path->device != NULL) {
3957 xpt_release_device(path->bus, path->target, path->device);
3958 path->device = NULL;
3959 }
3960 if (path->target != NULL) {
3961 xpt_release_target(path->bus, path->target);
3962 path->target = NULL;
3963 }
3964 if (path->bus != NULL) {
3965 xpt_release_bus(path->bus);
3966 path->bus = NULL;
3967 }
3968 }
3969
3970 void
3971 xpt_free_path(struct cam_path *path)
3972 {
3973 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3974 xpt_release_path(path);
3975 kfree(path, M_CAMXPT);
3976 }
3977
3978
3979 /*
3980 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3981 * in path1, 2 for match with wildcards in path2.
3982 */
3983 int
3984 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3985 {
3986 int retval = 0;
3987
3988 if (path1->bus != path2->bus) {
3989 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3990 retval = 1;
3991 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3992 retval = 2;
3993 else
3994 return (-1);
3995 }
3996 if (path1->target != path2->target) {
3997 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3998 if (retval == 0)
3999 retval = 1;
4000 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
4001 retval = 2;
4002 else
4003 return (-1);
4004 }
4005 if (path1->device != path2->device) {
4006 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
4007 if (retval == 0)
4008 retval = 1;
4009 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
4010 retval = 2;
4011 else
4012 return (-1);
4013 }
4014 return (retval);
4015 }
4016
4017 void
4018 xpt_print_path(struct cam_path *path)
4019 {
4020 if (path == NULL)
4021 kprintf("(nopath): ");
4022 else {
4023 if (path->periph != NULL)
4024 kprintf("(%s%d:", path->periph->periph_name,
4025 path->periph->unit_number);
4026 else
4027 kprintf("(noperiph:");
4028
4029 if (path->bus != NULL)
4030 kprintf("%s%d:%d:", path->bus->sim->sim_name,
4031 path->bus->sim->unit_number,
4032 path->bus->sim->bus_id);
4033 else
4034 kprintf("nobus:");
4035
4036 if (path->target != NULL)
4037 kprintf("%d:", path->target->target_id);
4038 else
4039 kprintf("X:");
4040
4041 if (path->device != NULL)
4042 kprintf("%d): ", path->device->lun_id);
4043 else
4044 kprintf("X): ");
4045 }
4046 }
4047
4048 int
4049 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
4050 {
4051 struct sbuf sb;
4052
4053 sbuf_new(&sb, str, str_len, 0);
4054
4055 if (path == NULL)
4056 sbuf_printf(&sb, "(nopath): ");
4057 else {
4058 if (path->periph != NULL)
4059 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
4060 path->periph->unit_number);
4061 else
4062 sbuf_printf(&sb, "(noperiph:");
4063
4064 if (path->bus != NULL)
4065 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
4066 path->bus->sim->unit_number,
4067 path->bus->sim->bus_id);
4068 else
4069 sbuf_printf(&sb, "nobus:");
4070
4071 if (path->target != NULL)
4072 sbuf_printf(&sb, "%d:", path->target->target_id);
4073 else
4074 sbuf_printf(&sb, "X:");
4075
4076 if (path->device != NULL)
4077 sbuf_printf(&sb, "%d): ", path->device->lun_id);
4078 else
4079 sbuf_printf(&sb, "X): ");
4080 }
4081 sbuf_finish(&sb);
4082
4083 return(sbuf_len(&sb));
4084 }
4085
4086 path_id_t
4087 xpt_path_path_id(struct cam_path *path)
4088 {
4089 return(path->bus->path_id);
4090 }
4091
4092 target_id_t
4093 xpt_path_target_id(struct cam_path *path)
4094 {
4095 if (path->target != NULL)
4096 return (path->target->target_id);
4097 else
4098 return (CAM_TARGET_WILDCARD);
4099 }
4100
4101 lun_id_t
4102 xpt_path_lun_id(struct cam_path *path)
4103 {
4104 if (path->device != NULL)
4105 return (path->device->lun_id);
4106 else
4107 return (CAM_LUN_WILDCARD);
4108 }
4109
4110 struct cam_sim *
4111 xpt_path_sim(struct cam_path *path)
4112 {
4113 return (path->bus->sim);
4114 }
4115
4116 struct cam_periph*
4117 xpt_path_periph(struct cam_path *path)
4118 {
4119 return (path->periph);
4120 }
4121
4122 /*
4123 * Release a CAM control block for the caller. Remit the cost of the structure
4124 * to the device referenced by the path. If the this device had no 'credits'
4125 * and peripheral drivers have registered async callbacks for this notification
4126 * call them now.
4127 */
4128 void
4129 xpt_release_ccb(union ccb *free_ccb)
4130 {
4131 struct cam_path *path;
4132 struct cam_ed *device;
4133 struct cam_eb *bus;
4134
4135 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4136 path = free_ccb->ccb_h.path;
4137 device = path->device;
4138 bus = path->bus;
4139 crit_enter();
4140 cam_ccbq_release_opening(&device->ccbq);
4141 if (xpt_ccb_count > xpt_max_ccbs) {
4142 xpt_free_ccb(free_ccb);
4143 xpt_ccb_count--;
4144 } else {
4145 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle);
4146 }
4147 if (bus->sim->devq == NULL) {
4148 crit_exit();
4149 return;
4150 }
4151 bus->sim->devq->alloc_openings++;
4152 bus->sim->devq->alloc_active--;
4153 /* XXX Turn this into an inline function - xpt_run_device?? */
4154 if ((device_is_alloc_queued(device) == 0)
4155 && (device->drvq.entries > 0)) {
4156 xpt_schedule_dev_allocq(bus, device);
4157 }
4158 crit_exit();
4159 if (bus->sim->devq && dev_allocq_is_runnable(bus->sim->devq))
4160 xpt_run_dev_allocq(bus);
4161 }
4162
4163 /* Functions accessed by SIM drivers */
4164
4165 /*
4166 * A sim structure, listing the SIM entry points and instance
4167 * identification info is passed to xpt_bus_register to hook the SIM
4168 * into the CAM framework. xpt_bus_register creates a cam_eb entry
4169 * for this new bus and places it in the array of busses and assigns
4170 * it a path_id. The path_id may be influenced by "hard wiring"
4171 * information specified by the user. Once interrupt services are
4172 * availible, the bus will be probed.
4173 */
4174 int32_t
4175 xpt_bus_register(struct cam_sim *sim, u_int32_t bus)
4176 {
4177 struct cam_eb *new_bus;
4178 struct cam_eb *old_bus;
4179 struct ccb_pathinq cpi;
4180
4181 sim->bus_id = bus;
4182 new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT);
4183
4184 if (strcmp(sim->sim_name, "xpt") != 0) {
4185 sim->path_id =
4186 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4187 }
4188
4189 TAILQ_INIT(&new_bus->et_entries);
4190 new_bus->path_id = sim->path_id;
4191 new_bus->sim = sim;
4192 ++sim->refcount;
4193 timevalclear(&new_bus->last_reset);
4194 new_bus->flags = 0;
4195 new_bus->refcount = 1; /* Held until a bus_deregister event */
4196 new_bus->generation = 0;
4197 crit_enter();
4198 old_bus = TAILQ_FIRST(&xpt_busses);
4199 while (old_bus != NULL
4200 && old_bus->path_id < new_bus->path_id)
4201 old_bus = TAILQ_NEXT(old_bus, links);
4202 if (old_bus != NULL)
4203 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4204 else
4205 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links);
4206 bus_generation++;
4207 crit_exit();
4208
4209 /* Notify interested parties */
4210 if (sim->path_id != CAM_XPT_PATH_ID) {
4211 struct cam_path path;
4212
4213 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4214 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4215 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4216 cpi.ccb_h.func_code = XPT_PATH_INQ;
4217 xpt_action((union ccb *)&cpi);
4218 xpt_async(AC_PATH_REGISTERED, &path, &cpi);
4219 xpt_release_path(&path);
4220 }
4221 return (CAM_SUCCESS);
4222 }
4223
4224 /*
4225 * Deregister a bus. We must clean out all transactions pending on the bus.
4226 * This routine is typically called prior to cam_sim_free() (e.g. see
4227 * dev/usbmisc/umass/umass.c)
4228 */
4229 int32_t
4230 xpt_bus_deregister(path_id_t pathid)
4231 {
4232 struct cam_path bus_path;
4233 struct cam_ed *device;
4234 struct cam_ed_qinfo *qinfo;
4235 struct cam_devq *devq;
4236 struct cam_periph *periph;
4237 struct cam_sim *ccbsim;
4238 union ccb *work_ccb;
4239 cam_status status;
4240
4241 status = xpt_compile_path(&bus_path, NULL, pathid,
4242 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4243 if (status != CAM_REQ_CMP)
4244 return (status);
4245
4246 /*
4247 * This should clear out all pending requests and timeouts, but
4248 * the ccb's may be queued to a software interrupt.
4249 *
4250 * XXX AC_LOST_DEVICE does not precisely abort the pending requests,
4251 * and it really ought to.
4252 */
4253 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4254 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4255
4256 /* The SIM may be gone, so use a dummy SIM for any stray operations. */
4257 devq = bus_path.bus->sim->devq;
4258 bus_path.bus->sim = &cam_dead_sim;
4259
4260 /* Execute any pending operations now. */
4261 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
4262 CAMQ_HEAD)) != NULL ||
4263 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
4264 CAMQ_HEAD)) != NULL) {
4265 do {
4266 device = qinfo->device;
4267 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
4268 if (work_ccb != NULL) {
4269 devq->active_dev = device;
4270 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
4271 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
4272 ccbsim = work_ccb->ccb_h.path->bus->sim;
4273 (*(ccbsim->sim_action))(ccbsim, work_ccb);
4274 }
4275
4276 periph = (struct cam_periph *)camq_remove(&device->drvq,
4277 CAMQ_HEAD);
4278 if (periph != NULL)
4279 xpt_schedule(periph, periph->pinfo.priority);
4280 } while (work_ccb != NULL || periph != NULL);
4281 }
4282
4283 /* Make sure all completed CCBs are processed. */
4284 while (!TAILQ_EMPTY(&cam_bioq)) {
4285 camisr(&cam_bioq);
4286
4287 /* Repeat the async's for the benefit of any new devices. */
4288 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4289 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4290 }
4291
4292 /* Release the reference count held while registered. */
4293 xpt_release_bus(bus_path.bus);
4294 xpt_release_path(&bus_path);
4295
4296 /* Recheck for more completed CCBs. */
4297 while (!TAILQ_EMPTY(&cam_bioq))
4298 camisr(&cam_bioq);
4299
4300 return (CAM_REQ_CMP);
4301 }
4302
4303 static path_id_t
4304 xptnextfreepathid(void)
4305 {
4306 struct cam_eb *bus;
4307 path_id_t pathid;
4308 char *strval;
4309
4310 pathid = 0;
4311 bus = TAILQ_FIRST(&xpt_busses);
4312 retry:
4313 /* Find an unoccupied pathid */
4314 while (bus != NULL
4315 && bus->path_id <= pathid) {
4316 if (bus->path_id == pathid)
4317 pathid++;
4318 bus = TAILQ_NEXT(bus, links);
4319 }
4320
4321 /*
4322 * Ensure that this pathid is not reserved for
4323 * a bus that may be registered in the future.
4324 */
4325 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4326 ++pathid;
4327 /* Start the search over */
4328 goto retry;
4329 }
4330 return (pathid);
4331 }
4332
4333 static path_id_t
4334 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4335 {
4336 path_id_t pathid;
4337 int i, dunit, val;
4338 char buf[32];
4339
4340 pathid = CAM_XPT_PATH_ID;
4341 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4342 i = -1;
4343 while ((i = resource_query_string(i, "at", buf)) != -1) {
4344 if (strcmp(resource_query_name(i), "scbus")) {
4345 /* Avoid a bit of foot shooting. */
4346 continue;
4347 }
4348 dunit = resource_query_unit(i);
4349 if (dunit < 0) /* unwired?! */
4350 continue;
4351 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4352 if (sim_bus == val) {
4353 pathid = dunit;
4354 break;
4355 }
4356 } else if (sim_bus == 0) {
4357 /* Unspecified matches bus 0 */
4358 pathid = dunit;
4359 break;
4360 } else {
4361 kprintf("Ambiguous scbus configuration for %s%d "
4362 "bus %d, cannot wire down. The kernel "
4363 "config entry for scbus%d should "
4364 "specify a controller bus.\n"
4365 "Scbus will be assigned dynamically.\n",
4366 sim_name, sim_unit, sim_bus, dunit);
4367 break;
4368 }
4369 }
4370
4371 if (pathid == CAM_XPT_PATH_ID)
4372 pathid = xptnextfreepathid();
4373 return (pathid);
4374 }
4375
4376 void
4377 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4378 {
4379 struct cam_eb *bus;
4380 struct cam_et *target, *next_target;
4381 struct cam_ed *device, *next_device;
4382
4383 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4384
4385 /*
4386 * Most async events come from a CAM interrupt context. In
4387 * a few cases, the error recovery code at the peripheral layer,
4388 * which may run from our SWI or a process context, may signal
4389 * deferred events with a call to xpt_async. Ensure async
4390 * notifications are serialized by blocking cam interrupts.
4391 */
4392 crit_enter();
4393
4394 bus = path->bus;
4395
4396 if (async_code == AC_BUS_RESET) {
4397 /* Update our notion of when the last reset occurred */
4398 microuptime(&bus->last_reset);
4399 }
4400
4401 for (target = TAILQ_FIRST(&bus->et_entries);
4402 target != NULL;
4403 target = next_target) {
4404
4405 next_target = TAILQ_NEXT(target, links);
4406
4407 if (path->target != target
4408 && path->target->target_id != CAM_TARGET_WILDCARD
4409 && target->target_id != CAM_TARGET_WILDCARD)
4410 continue;
4411
4412 if (async_code == AC_SENT_BDR) {
4413 /* Update our notion of when the last reset occurred */
4414 microuptime(&path->target->last_reset);
4415 }
4416
4417 for (device = TAILQ_FIRST(&target->ed_entries);
4418 device != NULL;
4419 device = next_device) {
4420
4421 next_device = TAILQ_NEXT(device, links);
4422
4423 if (path->device != device
4424 && path->device->lun_id != CAM_LUN_WILDCARD
4425 && device->lun_id != CAM_LUN_WILDCARD)
4426 continue;
4427
4428 xpt_dev_async(async_code, bus, target,
4429 device, async_arg);
4430
4431 xpt_async_bcast(&device->asyncs, async_code,
4432 path, async_arg);
4433 }
4434 }
4435
4436 /*
4437 * If this wasn't a fully wildcarded async, tell all
4438 * clients that want all async events.
4439 */
4440 if (bus != xpt_periph->path->bus)
4441 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4442 path, async_arg);
4443 crit_exit();
4444 }
4445
4446 static void
4447 xpt_async_bcast(struct async_list *async_head,
4448 u_int32_t async_code,
4449 struct cam_path *path, void *async_arg)
4450 {
4451 struct async_node *cur_entry;
4452
4453 cur_entry = SLIST_FIRST(async_head);
4454 while (cur_entry != NULL) {
4455 struct async_node *next_entry;
4456 /*
4457 * Grab the next list entry before we call the current
4458 * entry's callback. This is because the callback function
4459 * can delete its async callback entry.
4460 */
4461 next_entry = SLIST_NEXT(cur_entry, links);
4462 if ((cur_entry->event_enable & async_code) != 0)
4463 cur_entry->callback(cur_entry->callback_arg,
4464 async_code, path,
4465 async_arg);
4466 cur_entry = next_entry;
4467 }
4468 }
4469
4470 /*
4471 * Handle any per-device event notifications that require action by the XPT.
4472 */
4473 static void
4474 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4475 struct cam_ed *device, void *async_arg)
4476 {
4477 cam_status status;
4478 struct cam_path newpath;
4479
4480 /*
4481 * We only need to handle events for real devices.
4482 */
4483 if (target->target_id == CAM_TARGET_WILDCARD
4484 || device->lun_id == CAM_LUN_WILDCARD)
4485 return;
4486
4487 /*
4488 * We need our own path with wildcards expanded to
4489 * handle certain types of events.
4490 */
4491 if ((async_code == AC_SENT_BDR)
4492 || (async_code == AC_BUS_RESET)
4493 || (async_code == AC_INQ_CHANGED))
4494 status = xpt_compile_path(&newpath, NULL,
4495 bus->path_id,
4496 target->target_id,
4497 device->lun_id);
4498 else
4499 status = CAM_REQ_CMP_ERR;
4500
4501 if (status == CAM_REQ_CMP) {
4502
4503 /*
4504 * Allow transfer negotiation to occur in a
4505 * tag free environment.
4506 */
4507 if (async_code == AC_SENT_BDR
4508 || async_code == AC_BUS_RESET)
4509 xpt_toggle_tags(&newpath);
4510
4511 if (async_code == AC_INQ_CHANGED) {
4512 /*
4513 * We've sent a start unit command, or
4514 * something similar to a device that
4515 * may have caused its inquiry data to
4516 * change. So we re-scan the device to
4517 * refresh the inquiry data for it.
4518 */
4519 xpt_scan_lun(newpath.periph, &newpath,
4520 CAM_EXPECT_INQ_CHANGE, NULL);
4521 }
4522 xpt_release_path(&newpath);
4523 } else if (async_code == AC_LOST_DEVICE) {
4524 /*
4525 * When we lose a device the device may be about to detach
4526 * the sim, we have to clear out all pending timeouts and
4527 * requests before that happens. XXX it would be nice if
4528 * we could abort the requests pertaining to the device.
4529 */
4530 xpt_release_devq_timeout(device);
4531 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) {
4532 device->flags |= CAM_DEV_UNCONFIGURED;
4533 xpt_release_device(bus, target, device);
4534 }
4535 } else if (async_code == AC_TRANSFER_NEG) {
4536 struct ccb_trans_settings *settings;
4537
4538 settings = (struct ccb_trans_settings *)async_arg;
4539 xpt_set_transfer_settings(settings, device,
4540 /*async_update*/TRUE);
4541 }
4542 }
4543
4544 u_int32_t
4545 xpt_freeze_devq(struct cam_path *path, u_int count)
4546 {
4547 struct ccb_hdr *ccbh;
4548
4549 crit_enter();
4550 path->device->qfrozen_cnt += count;
4551
4552 /*
4553 * Mark the last CCB in the queue as needing
4554 * to be requeued if the driver hasn't
4555 * changed it's state yet. This fixes a race
4556 * where a ccb is just about to be queued to
4557 * a controller driver when it's interrupt routine
4558 * freezes the queue. To completly close the
4559 * hole, controller drives must check to see
4560 * if a ccb's status is still CAM_REQ_INPROG
4561 * under critical section protection just before they queue
4562 * the CCB. See ahc_action/ahc_freeze_devq for
4563 * an example.
4564 */
4565 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4566 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4567 ccbh->status = CAM_REQUEUE_REQ;
4568 crit_exit();
4569 return (path->device->qfrozen_cnt);
4570 }
4571
4572 u_int32_t
4573 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4574 {
4575 if (sim->devq == NULL)
4576 return(count);
4577 sim->devq->send_queue.qfrozen_cnt += count;
4578 if (sim->devq->active_dev != NULL) {
4579 struct ccb_hdr *ccbh;
4580
4581 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4582 ccb_hdr_tailq);
4583 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4584 ccbh->status = CAM_REQUEUE_REQ;
4585 }
4586 return (sim->devq->send_queue.qfrozen_cnt);
4587 }
4588
4589 /*
4590 * WARNING: most devices, especially USB/UMASS, may detach their sim early.
4591 * We ref-count the sim (and the bus only NULLs it out when the bus has been
4592 * freed, which is not the case here), but the device queue is also freed XXX
4593 * and we have to check that here.
4594 *
4595 * XXX fixme: could we simply not null-out the device queue via
4596 * cam_sim_free()?
4597 */
4598 static void
4599 xpt_release_devq_timeout(void *arg)
4600 {
4601 struct cam_ed *device;
4602
4603 device = (struct cam_ed *)arg;
4604
4605 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4606 }
4607
4608 void
4609 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4610 {
4611 xpt_release_devq_device(path->device, count, run_queue);
4612 }
4613
4614 static void
4615 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4616 {
4617 int rundevq;
4618
4619 rundevq = 0;
4620 crit_enter();
4621
4622 if (dev->qfrozen_cnt > 0) {
4623
4624 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4625 dev->qfrozen_cnt -= count;
4626 if (dev->qfrozen_cnt == 0) {
4627
4628 /*
4629 * No longer need to wait for a successful
4630 * command completion.
4631 */
4632 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4633
4634 /*
4635 * Remove any timeouts that might be scheduled
4636 * to release this queue.
4637 */
4638 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4639 callout_stop(&dev->c_handle);
4640 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4641 }
4642
4643 /*
4644 * Now that we are unfrozen schedule the
4645 * device so any pending transactions are
4646 * run.
4647 */
4648 if ((dev->ccbq.queue.entries > 0)
4649 && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4650 && (run_queue != 0)) {
4651 rundevq = 1;
4652 }
4653 }
4654 }
4655 if (rundevq != 0)
4656 xpt_run_dev_sendq(dev->target->bus);
4657 crit_exit();
4658 }
4659
4660 void
4661 xpt_release_simq(struct cam_sim *sim, int run_queue)
4662 {
4663 struct camq *sendq;
4664
4665 if (sim->devq == NULL)
4666 return;
4667
4668 sendq = &(sim->devq->send_queue);
4669 crit_enter();
4670
4671 if (sendq->qfrozen_cnt > 0) {
4672 sendq->qfrozen_cnt--;
4673 if (sendq->qfrozen_cnt == 0) {
4674 struct cam_eb *bus;
4675
4676 /*
4677 * If there is a timeout scheduled to release this
4678 * sim queue, remove it. The queue frozen count is
4679 * already at 0.
4680 */
4681 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4682 callout_stop(&sim->c_handle);
4683 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4684 }
4685 bus = xpt_find_bus(sim->path_id);
4686 crit_exit();
4687
4688 if (run_queue) {
4689 /*
4690 * Now that we are unfrozen run the send queue.
4691 */
4692 xpt_run_dev_sendq(bus);
4693 }
4694 xpt_release_bus(bus);
4695 } else {
4696 crit_exit();
4697 }
4698 } else {
4699 crit_exit();
4700 }
4701 }
4702
4703 void
4704 xpt_done(union ccb *done_ccb)
4705 {
4706 crit_enter();
4707
4708 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4709 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4710 /*
4711 * Queue up the request for handling by our SWI handler
4712 * any of the "non-immediate" type of ccbs.
4713 */
4714 switch (done_ccb->ccb_h.path->periph->type) {
4715 case CAM_PERIPH_BIO:
4716 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h,
4717 sim_links.tqe);
4718 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4719 setsoftcambio();
4720 break;
4721 default:
4722 panic("unknown periph type %d",
4723 done_ccb->ccb_h.path->periph->type);
4724 }
4725 }
4726 crit_exit();
4727 }
4728
4729 union ccb *
4730 xpt_alloc_ccb(void)
4731 {
4732 union ccb *new_ccb;
4733
4734 new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT);
4735 return (new_ccb);
4736 }
4737
4738 void
4739 xpt_free_ccb(union ccb *free_ccb)
4740 {
4741 kfree(free_ccb, M_CAMXPT);
4742 }
4743
4744
4745
4746 /* Private XPT functions */
4747
4748 /*
4749 * Get a CAM control block for the caller. Charge the structure to the device
4750 * referenced by the path. If the this device has no 'credits' then the
4751 * device already has the maximum number of outstanding operations under way
4752 * and we return NULL. If we don't have sufficient resources to allocate more
4753 * ccbs, we also return NULL.
4754 */
4755 static union ccb *
4756 xpt_get_ccb(struct cam_ed *device)
4757 {
4758 union ccb *new_ccb;
4759
4760 crit_enter();
4761 if ((new_ccb = (union ccb *)SLIST_FIRST(&ccb_freeq)) == NULL) {
4762 new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT);
4763 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h,
4764 xpt_links.sle);
4765 xpt_ccb_count++;
4766 }
4767 cam_ccbq_take_opening(&device->ccbq);
4768 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle);
4769 crit_exit();
4770 return (new_ccb);
4771 }
4772
4773 static void
4774 xpt_release_bus(struct cam_eb *bus)
4775 {
4776
4777 crit_enter();
4778 if (bus->refcount == 1) {
4779 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL);
4780 TAILQ_REMOVE(&xpt_busses, bus, links);
4781 if (bus->sim) {
4782 cam_sim_release(bus->sim, 0);
4783 bus->sim = NULL;
4784 }
4785 bus_generation++;
4786 KKASSERT(bus->refcount == 1);
4787 kfree(bus, M_CAMXPT);
4788 } else {
4789 --bus->refcount;
4790 }
4791 crit_exit();
4792 }
4793
4794 static struct cam_et *
4795 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4796 {
4797 struct cam_et *target;
4798 struct cam_et *cur_target;
4799
4800 target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT);
4801
4802 TAILQ_INIT(&target->ed_entries);
4803 target->bus = bus;
4804 target->target_id = target_id;
4805 target->refcount = 1;
4806 target->generation = 0;
4807 timevalclear(&target->last_reset);
4808 /*
4809 * Hold a reference to our parent bus so it
4810 * will not go away before we do.
4811 */
4812 bus->refcount++;
4813
4814 /* Insertion sort into our bus's target list */
4815 cur_target = TAILQ_FIRST(&bus->et_entries);
4816 while (cur_target != NULL && cur_target->target_id < target_id)
4817 cur_target = TAILQ_NEXT(cur_target, links);
4818
4819 if (cur_target != NULL) {
4820 TAILQ_INSERT_BEFORE(cur_target, target, links);
4821 } else {
4822 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4823 }
4824 bus->generation++;
4825 return (target);
4826 }
4827
4828 static void
4829 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
4830 {
4831 crit_enter();
4832 if (target->refcount == 1) {
4833 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL);
4834 TAILQ_REMOVE(&bus->et_entries, target, links);
4835 bus->generation++;
4836 xpt_release_bus(bus);
4837 KKASSERT(target->refcount == 1);
4838 kfree(target, M_CAMXPT);
4839 } else {
4840 --target->refcount;
4841 }
4842 crit_exit();
4843 }
4844
4845 static struct cam_ed *
4846 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4847 {
4848 struct cam_path path;
4849 struct cam_ed *device;
4850 struct cam_devq *devq;
4851 cam_status status;
4852
4853 if (SIM_DEAD(bus->sim))
4854 return (NULL);
4855
4856 /* Make space for us in the device queue on our bus */
4857 if (bus->sim->devq == NULL)
4858 return(NULL);
4859 devq = bus->sim->devq;
4860 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
4861
4862 if (status != CAM_REQ_CMP) {
4863 device = NULL;
4864 } else {
4865 device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT);
4866 }
4867
4868 if (device != NULL) {
4869 struct cam_ed *cur_device;
4870
4871 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
4872 device->alloc_ccb_entry.device = device;
4873 cam_init_pinfo(&device->send_ccb_entry.pinfo);
4874 device->send_ccb_entry.device = device;
4875 device->target = target;
4876 device->lun_id = lun_id;
4877 /* Initialize our queues */
4878 if (camq_init(&device->drvq, 0) != 0) {
4879 kfree(device, M_CAMXPT);
4880 return (NULL);
4881 }
4882 if (cam_ccbq_init(&device->ccbq,
4883 bus->sim->max_dev_openings) != 0) {
4884 camq_fini(&device->drvq);
4885 kfree(device, M_CAMXPT);
4886 return (NULL);
4887 }
4888 SLIST_INIT(&device->asyncs);
4889 SLIST_INIT(&device->periphs);
4890 device->generation = 0;
4891 device->owner = NULL;
4892 /*
4893 * Take the default quirk entry until we have inquiry
4894 * data and can determine a better quirk to use.
4895 */
4896 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
4897 bzero(&device->inq_data, sizeof(device->inq_data));
4898 device->inq_flags = 0;
4899 device->queue_flags = 0;
4900 device->serial_num = NULL;
4901 device->serial_num_len = 0;
4902 device->qfrozen_cnt = 0;
4903 device->flags = CAM_DEV_UNCONFIGURED;
4904 device->tag_delay_count = 0;
4905 device->tag_saved_openings = 0;
4906 device->refcount = 1;
4907 callout_init(&device->c_handle);
4908
4909 /*
4910 * Hold a reference to our parent target so it
4911 * will not go away before we do.
4912 */
4913 target->refcount++;
4914
4915 /*
4916 * XXX should be limited by number of CCBs this bus can
4917 * do.
4918 */
4919 xpt_max_ccbs += device->ccbq.devq_openings;
4920 /* Insertion sort into our target's device list */
4921 cur_device = TAILQ_FIRST(&target->ed_entries);
4922 while (cur_device != NULL && cur_device->lun_id < lun_id)
4923 cur_device = TAILQ_NEXT(cur_device, links);
4924 if (cur_device != NULL) {
4925 TAILQ_INSERT_BEFORE(cur_device, device, links);
4926 } else {
4927 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4928 }
4929 target->generation++;
4930 if (lun_id != CAM_LUN_WILDCARD) {
4931 xpt_compile_path(&path,
4932 NULL,
4933 bus->path_id,
4934 target->target_id,
4935 lun_id);
4936 xpt_devise_transport(&path);
4937 xpt_release_path(&path);
4938 }
4939 }
4940 return (device);
4941 }
4942
4943 static void
4944 xpt_reference_device(struct cam_ed *device)
4945 {
4946 ++device->refcount;
4947 }
4948
4949 static void
4950 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
4951 struct cam_ed *device)
4952 {
4953 struct cam_devq *devq;
4954
4955 crit_enter();
4956 if (device->refcount == 1) {
4957 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED);
4958
4959 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
4960 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
4961 panic("Removing device while still queued for ccbs");
4962
4963 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4964 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4965 callout_stop(&device->c_handle);
4966 }
4967
4968 TAILQ_REMOVE(&target->ed_entries, device,links);
4969 target->generation++;
4970 xpt_max_ccbs -= device->ccbq.devq_openings;
4971 if (!SIM_DEAD(bus->sim)) {
4972 /* Release our slot in the devq */
4973 devq = bus->sim->devq;
4974 cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
4975 }
4976 camq_fini(&device->drvq);
4977 camq_fini(&device->ccbq.queue);
4978 xpt_release_target(bus, target);
4979 KKASSERT(device->refcount == 1);
4980 kfree(device, M_CAMXPT);
4981 } else {
4982 --device->refcount;
4983 }
4984 crit_exit();
4985 }
4986
4987 static u_int32_t
4988 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4989 {
4990 int diff;
4991 int result;
4992 struct cam_ed *dev;
4993
4994 dev = path->device;
4995
4996 crit_enter();
4997
4998 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
4999 result = cam_ccbq_resize(&dev->ccbq, newopenings);
5000 if (result == CAM_REQ_CMP && (diff < 0)) {
5001 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
5002 }
5003 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5004 || (dev->inq_flags & SID_CmdQue) != 0)
5005 dev->tag_saved_openings = newopenings;
5006 /* Adjust the global limit */
5007 xpt_max_ccbs += diff;
5008 crit_exit();
5009 return (result);
5010 }
5011
5012 static struct cam_eb *
5013 xpt_find_bus(path_id_t path_id)
5014 {
5015 struct cam_eb *bus;
5016
5017 TAILQ_FOREACH(bus, &xpt_busses, links) {
5018 if (bus->path_id == path_id) {
5019 bus->refcount++;
5020 break;
5021 }
5022 }
5023 return (bus);
5024 }
5025
5026 static struct cam_et *
5027 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5028 {
5029 struct cam_et *target;
5030
5031 TAILQ_FOREACH(target, &bus->et_entries, links) {
5032 if (target->target_id == target_id) {
5033 target->refcount++;
5034 break;
5035 }
5036 }
5037 return (target);
5038 }
5039
5040 static struct cam_ed *
5041 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5042 {
5043 struct cam_ed *device;
5044
5045 TAILQ_FOREACH(device, &target->ed_entries, links) {
5046 if (device->lun_id == lun_id) {
5047 device->refcount++;
5048 break;
5049 }
5050 }
5051 return (device);
5052 }
5053
5054 typedef struct {
5055 union ccb *request_ccb;
5056 struct ccb_pathinq *cpi;
5057 int counter;
5058 } xpt_scan_bus_info;
5059
5060 /*
5061 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
5062 * As the scan progresses, xpt_scan_bus is used as the
5063 * callback on completion function.
5064 */
5065 static void
5066 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
5067 {
5068 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5069 ("xpt_scan_bus\n"));
5070 switch (request_ccb->ccb_h.func_code) {
5071 case XPT_SCAN_BUS:
5072 {
5073 xpt_scan_bus_info *scan_info;
5074 union ccb *work_ccb;
5075 struct cam_path *path;
5076 u_int i;
5077 u_int max_target;
5078 u_int initiator_id;
5079
5080 /* Find out the characteristics of the bus */
5081 work_ccb = xpt_alloc_ccb();
5082 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
5083 request_ccb->ccb_h.pinfo.priority);
5084 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
5085 xpt_action(work_ccb);
5086 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
5087 request_ccb->ccb_h.status = work_ccb->ccb_h.status;
5088 xpt_free_ccb(work_ccb);
5089 xpt_done(request_ccb);
5090 return;
5091 }
5092
5093 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5094 /*
5095 * Can't scan the bus on an adapter that
5096 * cannot perform the initiator role.
5097 */
5098 request_ccb->ccb_h.status = CAM_REQ_CMP;
5099 xpt_free_ccb(work_ccb);
5100 xpt_done(request_ccb);
5101 return;
5102 }
5103
5104 /* Save some state for use while we probe for devices */
5105 scan_info = (xpt_scan_bus_info *)
5106 kmalloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT);
5107 scan_info->request_ccb = request_ccb;
5108 scan_info->cpi = &work_ccb->cpi;
5109
5110 /* Cache on our stack so we can work asynchronously */
5111 max_target = scan_info->cpi->max_target;
5112 initiator_id = scan_info->cpi->initiator_id;
5113
5114
5115 /*
5116 * We can scan all targets in parallel, or do it sequentially.
5117 */
5118 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
5119 max_target = 0;
5120 scan_info->counter = 0;
5121 } else {
5122 scan_info->counter = scan_info->cpi->max_target + 1;
5123 if (scan_info->cpi->initiator_id < scan_info->counter) {
5124 scan_info->counter--;
5125 }
5126 }
5127
5128 for (i = 0; i <= max_target; i++) {
5129 cam_status status;
5130 if (i == initiator_id)
5131 continue;
5132
5133 status = xpt_create_path(&path, xpt_periph,
5134 request_ccb->ccb_h.path_id,
5135 i, 0);
5136 if (status != CAM_REQ_CMP) {
5137 kprintf("xpt_scan_bus: xpt_create_path failed"
5138 " with status %#x, bus scan halted\n",
5139 status);
5140 kfree(scan_info, M_TEMP);
5141 request_ccb->ccb_h.status = status;
5142 xpt_free_ccb(work_ccb);
5143 xpt_done(request_ccb);
5144 break;
5145 }
5146 work_ccb = xpt_alloc_ccb();
5147 xpt_setup_ccb(&work_ccb->ccb_h, path,
5148 request_ccb->ccb_h.pinfo.priority);
5149 work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5150 work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5151 work_ccb->ccb_h.ppriv_ptr0 = scan_info;
5152 work_ccb->crcn.flags = request_ccb->crcn.flags;
5153 xpt_action(work_ccb);
5154 }
5155 break;
5156 }
5157 case XPT_SCAN_LUN:
5158 {
5159 cam_status status;
5160 struct cam_path *path;
5161 xpt_scan_bus_info *scan_info;
5162 path_id_t path_id;
5163 target_id_t target_id;
5164 lun_id_t lun_id;
5165
5166 /* Reuse the same CCB to query if a device was really found */
5167 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
5168 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
5169 request_ccb->ccb_h.pinfo.priority);
5170 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5171
5172 path_id = request_ccb->ccb_h.path_id;
5173 target_id = request_ccb->ccb_h.target_id;
5174 lun_id = request_ccb->ccb_h.target_lun;
5175 xpt_action(request_ccb);
5176
5177 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
5178 struct cam_ed *device;
5179 struct cam_et *target;
5180 int phl;
5181
5182 /*
5183 * If we already probed lun 0 successfully, or
5184 * we have additional configured luns on this
5185 * target that might have "gone away", go onto
5186 * the next lun.
5187 */
5188 target = request_ccb->ccb_h.path->target;
5189 /*
5190 * We may touch devices that we don't
5191 * hold references too, so ensure they
5192 * don't disappear out from under us.
5193 * The target above is referenced by the
5194 * path in the request ccb.
5195 */
5196 phl = 0;
5197 crit_enter();
5198 device = TAILQ_FIRST(&target->ed_entries);
5199 if (device != NULL) {
5200 phl = CAN_SRCH_HI_SPARSE(device);
5201 if (device->lun_id == 0)
5202 device = TAILQ_NEXT(device, links);
5203 }
5204 crit_exit();
5205 if ((lun_id != 0) || (device != NULL)) {
5206 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
5207 lun_id++;
5208 }
5209 } else {
5210 struct cam_ed *device;
5211
5212 device = request_ccb->ccb_h.path->device;
5213
5214 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
5215 /* Try the next lun */
5216 if (lun_id < (CAM_SCSI2_MAXLUN-1)
5217 || CAN_SRCH_HI_DENSE(device))
5218 lun_id++;
5219 }
5220 }
5221
5222 /*
5223 * Free the current request path- we're done with it.
5224 */
5225 xpt_free_path(request_ccb->ccb_h.path);
5226
5227 /*
5228 * Check to see if we scan any further luns.
5229 */
5230 if (lun_id == request_ccb->ccb_h.target_lun
5231 || lun_id > scan_info->cpi->max_lun) {
5232 int done;
5233
5234 hop_again:
5235 done = 0;
5236 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
5237 scan_info->counter++;
5238 if (scan_info->counter ==
5239 scan_info->cpi->initiator_id) {
5240 scan_info->counter++;
5241 }
5242 if (scan_info->counter >=
5243 scan_info->cpi->max_target+1) {
5244 done = 1;
5245 }
5246 } else {
5247 scan_info->counter--;
5248 if (scan_info->counter == 0) {
5249 done = 1;
5250 }
5251 }
5252 if (done) {
5253 xpt_free_ccb(request_ccb);
5254 xpt_free_ccb((union ccb *)scan_info->cpi);
5255 request_ccb = scan_info->request_ccb;
5256 kfree(scan_info, M_TEMP);
5257 request_ccb->ccb_h.status = CAM_REQ_CMP;
5258 xpt_done(request_ccb);
5259 break;
5260 }
5261
5262 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) {
5263 break;
5264 }
5265 status = xpt_create_path(&path, xpt_periph,
5266 scan_info->request_ccb->ccb_h.path_id,
5267 scan_info->counter, 0);
5268 if (status != CAM_REQ_CMP) {
5269 kprintf("xpt_scan_bus: xpt_create_path failed"
5270 " with status %#x, bus scan halted\n",
5271 status);
5272 xpt_free_ccb(request_ccb);
5273 xpt_free_ccb((union ccb *)scan_info->cpi);
5274 request_ccb = scan_info->request_ccb;
5275 kfree(scan_info, M_TEMP);
5276 request_ccb->ccb_h.status = status;
5277 xpt_done(request_ccb);
5278 break;
5279 }
5280 xpt_setup_ccb(&request_ccb->ccb_h, path,
5281 request_ccb->ccb_h.pinfo.priority);
5282 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5283 request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5284 request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5285 request_ccb->crcn.flags =
5286 scan_info->request_ccb->crcn.flags;
5287 } else {
5288 status = xpt_create_path(&path, xpt_periph,
5289 path_id, target_id, lun_id);
5290 if (status != CAM_REQ_CMP) {
5291 kprintf("xpt_scan_bus: xpt_create_path failed "
5292 "with status %#x, halting LUN scan\n",
5293 status);
5294 goto hop_again;
5295 }
5296 xpt_setup_ccb(&request_ccb->ccb_h, path,
5297 request_ccb->ccb_h.pinfo.priority);
5298 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5299 request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5300 request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5301 request_ccb->crcn.flags =
5302 scan_info->request_ccb->crcn.flags;
5303 }
5304 xpt_action(request_ccb);
5305 break;
5306 }
5307 default:
5308 break;
5309 }
5310 }
5311
5312 typedef enum {
5313 PROBE_TUR,
5314 PROBE_INQUIRY,
5315 PROBE_FULL_INQUIRY,
5316 PROBE_MODE_SENSE,
5317 PROBE_SERIAL_NUM,
5318 PROBE_TUR_FOR_NEGOTIATION
5319 } probe_action;
5320
5321 typedef enum {
5322 PROBE_INQUIRY_CKSUM = 0x01,
5323 PROBE_SERIAL_CKSUM = 0x02,
5324 PROBE_NO_ANNOUNCE = 0x04
5325 } probe_flags;
5326
5327 typedef struct {
5328 TAILQ_HEAD(, ccb_hdr) request_ccbs;
5329 probe_action action;
5330 union ccb saved_ccb;
5331 probe_flags flags;
5332 MD5_CTX context;
5333 u_int8_t digest[16];
5334 } probe_softc;
5335
5336 static void
5337 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5338 cam_flags flags, union ccb *request_ccb)
5339 {
5340 struct ccb_pathinq cpi;
5341 cam_status status;
5342 struct cam_path *new_path;
5343 struct cam_periph *old_periph;
5344
5345 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5346 ("xpt_scan_lun\n"));
5347
5348 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5349 cpi.ccb_h.func_code = XPT_PATH_INQ;
5350 xpt_action((union ccb *)&cpi);
5351
5352 if (cpi.ccb_h.status != CAM_REQ_CMP) {
5353 if (request_ccb != NULL) {
5354 request_ccb->ccb_h.status = cpi.ccb_h.status;
5355 xpt_done(request_ccb);
5356 }
5357 return;
5358 }
5359
5360 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5361 /*
5362 * Can't scan the bus on an adapter that
5363 * cannot perform the initiator role.
5364 */
5365 if (request_ccb != NULL) {
5366 request_ccb->ccb_h.status = CAM_REQ_CMP;
5367 xpt_done(request_ccb);
5368 }
5369 return;
5370 }
5371
5372 if (request_ccb == NULL) {
5373 request_ccb = kmalloc(sizeof(union ccb), M_TEMP, M_INTWAIT);
5374 new_path = kmalloc(sizeof(*new_path), M_TEMP, M_INTWAIT);
5375 status = xpt_compile_path(new_path, xpt_periph,
5376 path->bus->path_id,
5377 path->target->target_id,
5378 path->device->lun_id);
5379
5380 if (status != CAM_REQ_CMP) {
5381 xpt_print_path(path);
5382 kprintf("xpt_scan_lun: can't compile path, can't "
5383 "continue\n");
5384 kfree(request_ccb, M_TEMP);
5385 kfree(new_path, M_TEMP);
5386 return;
5387 }
5388 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5389 request_ccb->ccb_h.cbfcnp = xptscandone;
5390 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5391 request_ccb->crcn.flags = flags;
5392 }
5393
5394 crit_enter();
5395 if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5396 probe_softc *softc;
5397
5398 softc = (probe_softc *)old_periph->softc;
5399 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5400 periph_links.tqe);
5401 } else {
5402 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5403 probestart, "probe",
5404 CAM_PERIPH_BIO,
5405 request_ccb->ccb_h.path, NULL, 0,
5406 request_ccb);
5407
5408 if (status != CAM_REQ_CMP) {
5409 xpt_print_path(path);
5410 kprintf("xpt_scan_lun: cam_alloc_periph returned an "
5411 "error, can't continue probe\n");
5412 request_ccb->ccb_h.status = status;
5413 xpt_done(request_ccb);
5414 }
5415 }
5416 crit_exit();
5417 }
5418
5419 static void
5420 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5421 {
5422 xpt_release_path(done_ccb->ccb_h.path);
5423 kfree(done_ccb->ccb_h.path, M_TEMP);
5424 kfree(done_ccb, M_TEMP);
5425 }
5426
5427 static cam_status
5428 proberegister(struct cam_periph *periph, void *arg)
5429 {
5430 union ccb *request_ccb; /* CCB representing the probe request */
5431 probe_softc *softc;
5432
5433 request_ccb = (union ccb *)arg;
5434 if (periph == NULL) {
5435 kprintf("proberegister: periph was NULL!!\n");
5436 return(CAM_REQ_CMP_ERR);
5437 }
5438
5439 if (request_ccb == NULL) {
5440 kprintf("proberegister: no probe CCB, "
5441 "can't register device\n");
5442 return(CAM_REQ_CMP_ERR);
5443 }
5444
5445 softc = kmalloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO);
5446 TAILQ_INIT(&softc->request_ccbs);
5447 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5448 periph_links.tqe);
5449 softc->flags = 0;
5450 periph->softc = softc;
5451 cam_periph_acquire(periph);
5452 /*
5453 * Ensure we've waited at least a bus settle
5454 * delay before attempting to probe the device.
5455 * For HBAs that don't do bus resets, this won't make a difference.
5456 */
5457 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5458 scsi_delay);
5459 probeschedule(periph);
5460 return(CAM_REQ_CMP);
5461 }
5462
5463 static void
5464 probeschedule(struct cam_periph *periph)
5465 {
5466 struct ccb_pathinq cpi;
5467 union ccb *ccb;
5468 probe_softc *softc;
5469
5470 softc = (probe_softc *)periph->softc;
5471 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5472
5473 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5474 cpi.ccb_h.func_code = XPT_PATH_INQ;
5475 xpt_action((union ccb *)&cpi);
5476
5477 /*
5478 * If a device has gone away and another device, or the same one,
5479 * is back in the same place, it should have a unit attention
5480 * condition pending. It will not report the unit attention in
5481 * response to an inquiry, which may leave invalid transfer
5482 * negotiations in effect. The TUR will reveal the unit attention
5483 * condition. Only send the TUR for lun 0, since some devices
5484 * will get confused by commands other than inquiry to non-existent
5485 * luns. If you think a device has gone away start your scan from
5486 * lun 0. This will insure that any bogus transfer settings are
5487 * invalidated.
5488 *
5489 * If we haven't seen the device before and the controller supports
5490 * some kind of transfer negotiation, negotiate with the first
5491 * sent command if no bus reset was performed at startup. This
5492 * ensures that the device is not confused by transfer negotiation
5493 * settings left over by loader or BIOS action.
5494 */
5495 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5496 && (ccb->ccb_h.target_lun == 0)) {
5497 softc->action = PROBE_TUR;
5498 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5499 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5500 proberequestdefaultnegotiation(periph);
5501 softc->action = PROBE_INQUIRY;
5502 } else {
5503 softc->action = PROBE_INQUIRY;
5504 }
5505
5506 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5507 softc->flags |= PROBE_NO_ANNOUNCE;
5508 else
5509 softc->flags &= ~PROBE_NO_ANNOUNCE;
5510
5511 xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5512 }
5513
5514 static void
5515 probestart(struct cam_periph *periph, union ccb *start_ccb)
5516 {
5517 /* Probe the device that our peripheral driver points to */
5518 struct ccb_scsiio *csio;
5519 probe_softc *softc;
5520
5521 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5522
5523 softc = (probe_softc *)periph->softc;
5524 csio = &start_ccb->csio;
5525
5526 switch (softc->action) {
5527 case PROBE_TUR:
5528 case PROBE_TUR_FOR_NEGOTIATION:
5529 {
5530 scsi_test_unit_ready(csio,
5531 /*retries*/4,
5532 probedone,
5533 MSG_SIMPLE_Q_TAG,
5534 SSD_FULL_SIZE,
5535 /*timeout*/60000);
5536 break;
5537 }
5538 case PROBE_INQUIRY:
5539 case PROBE_FULL_INQUIRY:
5540 {
5541 u_int inquiry_len;
5542 struct scsi_inquiry_data *inq_buf;
5543
5544 inq_buf = &periph->path->device->inq_data;
5545 /*
5546 * If the device is currently configured, we calculate an
5547 * MD5 checksum of the inquiry data, and if the serial number
5548 * length is greater than 0, add the serial number data
5549 * into the checksum as well. Once the inquiry and the
5550 * serial number check finish, we attempt to figure out
5551 * whether we still have the same device.
5552 */
5553 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5554
5555 MD5Init(&softc->context);
5556 MD5Update(&softc->context, (unsigned char *)inq_buf,
5557 sizeof(struct scsi_inquiry_data));
5558 softc->flags |= PROBE_INQUIRY_CKSUM;
5559 if (periph->path->device->serial_num_len > 0) {
5560 MD5Update(&softc->context,
5561 periph->path->device->serial_num,
5562 periph->path->device->serial_num_len);
5563 softc->flags |= PROBE_SERIAL_CKSUM;
5564 }
5565 MD5Final(softc->digest, &softc->context);
5566 }
5567
5568 if (softc->action == PROBE_INQUIRY)
5569 inquiry_len = SHORT_INQUIRY_LENGTH;
5570 else
5571 inquiry_len = inq_buf->additional_length
5572 + offsetof(struct scsi_inquiry_data,
5573 additional_length) + 1;
5574
5575 /*
5576 * Some parallel SCSI devices fail to send an
5577 * ignore wide residue message when dealing with
5578 * odd length inquiry requests. Round up to be
5579 * safe.
5580 */
5581 inquiry_len = roundup2(inquiry_len, 2);
5582
5583 scsi_inquiry(csio,
5584 /*retries*/4,
5585 probedone,
5586 MSG_SIMPLE_Q_TAG,
5587 (u_int8_t *)inq_buf,
5588 inquiry_len,
5589 /*evpd*/FALSE,
5590 /*page_code*/0,
5591 SSD_MIN_SIZE,
5592 /*timeout*/60 * 1000);
5593 break;
5594 }
5595 case PROBE_MODE_SENSE:
5596 {
5597 void *mode_buf;
5598 int mode_buf_len;
5599
5600 mode_buf_len = sizeof(struct scsi_mode_header_6)
5601 + sizeof(struct scsi_mode_blk_desc)
5602 + sizeof(struct scsi_control_page);
5603 mode_buf = kmalloc(mode_buf_len, M_TEMP, M_INTWAIT);
5604 scsi_mode_sense(csio,
5605 /*retries*/4,
5606 probedone,
5607 MSG_SIMPLE_Q_TAG,
5608 /*dbd*/FALSE,
5609 SMS_PAGE_CTRL_CURRENT,
5610 SMS_CONTROL_MODE_PAGE,
5611 mode_buf,
5612 mode_buf_len,
5613 SSD_FULL_SIZE,
5614 /*timeout*/60000);
5615 break;
5616 }
5617 case PROBE_SERIAL_NUM:
5618 {
5619 struct scsi_vpd_unit_serial_number *serial_buf;
5620 struct cam_ed* device;
5621
5622 serial_buf = NULL;
5623 device = periph->path->device;
5624 device->serial_num = NULL;
5625 device->serial_num_len = 0;
5626
5627 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) {
5628 serial_buf = kmalloc(sizeof(*serial_buf), M_TEMP,
5629 M_INTWAIT | M_ZERO);
5630 scsi_inquiry(csio,
5631 /*retries*/4,
5632 probedone,
5633 MSG_SIMPLE_Q_TAG,
5634 (u_int8_t *)serial_buf,
5635 sizeof(*serial_buf),
5636 /*evpd*/TRUE,
5637 SVPD_UNIT_SERIAL_NUMBER,
5638 SSD_MIN_SIZE,
5639 /*timeout*/60 * 1000);
5640 break;
5641 }
5642 /*
5643 * We'll have to do without, let our probedone
5644 * routine finish up for us.
5645 */
5646 start_ccb->csio.data_ptr = NULL;
5647 probedone(periph, start_ccb);
5648 return;
5649 }
5650 }
5651 xpt_action(start_ccb);
5652 }
5653
5654 static void
5655 proberequestdefaultnegotiation(struct cam_periph *periph)
5656 {
5657 struct ccb_trans_settings cts;
5658
5659 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5660 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5661 cts.type = CTS_TYPE_USER_SETTINGS;
5662 xpt_action((union ccb *)&cts);
5663 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5664 return;
5665 }
5666 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5667 cts.type = CTS_TYPE_CURRENT_SETTINGS;
5668 xpt_action((union ccb *)&cts);
5669 }
5670
5671 static void
5672 probedone(struct cam_periph *periph, union ccb *done_ccb)
5673 {
5674 probe_softc *softc;
5675 struct cam_path *path;
5676 u_int32_t priority;
5677
5678 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
5679
5680 softc = (probe_softc *)periph->softc;
5681 path = done_ccb->ccb_h.path;
5682 priority = done_ccb->ccb_h.pinfo.priority;
5683
5684 switch (softc->action) {
5685 case PROBE_TUR:
5686 {
5687 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5688
5689 if (cam_periph_error(done_ccb, 0,
5690 SF_NO_PRINT, NULL) == ERESTART)
5691 return;
5692 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
5693 /* Don't wedge the queue */
5694 xpt_release_devq(done_ccb->ccb_h.path,
5695 /*count*/1,
5696 /*run_queue*/TRUE);
5697 }
5698 softc->action = PROBE_INQUIRY;
5699 xpt_release_ccb(done_ccb);
5700 xpt_schedule(periph, priority);
5701 return;
5702 }
5703 case PROBE_INQUIRY:
5704 case PROBE_FULL_INQUIRY:
5705 {
5706 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5707 struct scsi_inquiry_data *inq_buf;
5708 u_int8_t periph_qual;
5709
5710 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
5711 inq_buf = &path->device->inq_data;
5712
5713 periph_qual = SID_QUAL(inq_buf);
5714
5715 switch(periph_qual) {
5716 case SID_QUAL_LU_CONNECTED:
5717 {
5718 u_int8_t len;
5719
5720 /*
5721 * We conservatively request only
5722 * SHORT_INQUIRY_LEN bytes of inquiry
5723 * information during our first try
5724 * at sending an INQUIRY. If the device
5725 * has more information to give,
5726 * perform a second request specifying
5727 * the amount of information the device
5728 * is willing to give.
5729 */
5730 len = inq_buf->additional_length
5731 + offsetof(struct scsi_inquiry_data,
5732 additional_length) + 1;
5733 if (softc->action == PROBE_INQUIRY
5734 && len > SHORT_INQUIRY_LENGTH) {
5735 softc->action = PROBE_FULL_INQUIRY;
5736 xpt_release_ccb(done_ccb);
5737 xpt_schedule(periph, priority);
5738 return;
5739 }
5740
5741 xpt_find_quirk(path->device);
5742
5743 xpt_devise_transport(path);
5744 if (INQ_DATA_TQ_ENABLED(inq_buf))
5745 softc->action = PROBE_MODE_SENSE;
5746 else
5747 softc->action = PROBE_SERIAL_NUM;
5748
5749 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5750 xpt_reference_device(path->device);
5751
5752 xpt_release_ccb(done_ccb);
5753 xpt_schedule(periph, priority);
5754 return;
5755 }
5756 default:
5757 break;
5758 }
5759 } else if (cam_periph_error(done_ccb, 0,
5760 done_ccb->ccb_h.target_lun > 0
5761 ? SF_RETRY_UA|SF_QUIET_IR
5762 : SF_RETRY_UA,
5763 &softc->saved_ccb) == ERESTART) {
5764 return;
5765 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5766 /* Don't wedge the queue */
5767 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5768 /*run_queue*/TRUE);
5769 }
5770 /*
5771 * If we get to this point, we got an error status back
5772 * from the inquiry and the error status doesn't require
5773 * automatically retrying the command. Therefore, the
5774 * inquiry failed. If we had inquiry information before
5775 * for this device, but this latest inquiry command failed,
5776 * the device has probably gone away. If this device isn't
5777 * already marked unconfigured, notify the peripheral
5778 * drivers that this device is no more.
5779 */
5780 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5781 /* Send the async notification. */
5782 xpt_async(AC_LOST_DEVICE, path, NULL);
5783 }
5784
5785 xpt_release_ccb(done_ccb);
5786 break;
5787 }
5788 case PROBE_MODE_SENSE:
5789 {
5790 struct ccb_scsiio *csio;
5791 struct scsi_mode_header_6 *mode_hdr;
5792
5793 csio = &done_ccb->csio;
5794 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
5795 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5796 struct scsi_control_page *page;
5797 u_int8_t *offset;
5798
5799 offset = ((u_int8_t *)&mode_hdr[1])
5800 + mode_hdr->blk_desc_len;
5801 page = (struct scsi_control_page *)offset;
5802 path->device->queue_flags = page->queue_flags;
5803 } else if (cam_periph_error(done_ccb, 0,
5804 SF_RETRY_UA|SF_NO_PRINT,
5805 &softc->saved_ccb) == ERESTART) {
5806 return;
5807 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5808 /* Don't wedge the queue */
5809 xpt_release_devq(done_ccb->ccb_h.path,
5810 /*count*/1, /*run_queue*/TRUE);
5811 }
5812 xpt_release_ccb(done_ccb);
5813 kfree(mode_hdr, M_TEMP);
5814 softc->action = PROBE_SERIAL_NUM;
5815 xpt_schedule(periph, priority);
5816 return;
5817 }
5818 case PROBE_SERIAL_NUM:
5819 {
5820 struct ccb_scsiio *csio;
5821 struct scsi_vpd_unit_serial_number *serial_buf;
5822 u_int32_t priority;
5823 int changed;
5824 int have_serialnum;
5825
5826 changed = 1;
5827 have_serialnum = 0;
5828 csio = &done_ccb->csio;
5829 priority = done_ccb->ccb_h.pinfo.priority;
5830 serial_buf =
5831 (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
5832
5833 /* Clean up from previous instance of this device */
5834 if (path->device->serial_num != NULL) {
5835 kfree(path->device->serial_num, M_CAMXPT);
5836 path->device->serial_num = NULL;
5837 path->device->serial_num_len = 0;
5838 }
5839
5840 if (serial_buf == NULL) {
5841 /*
5842 * Don't process the command as it was never sent
5843 */
5844 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
5845 && (serial_buf->length > 0)) {
5846
5847 have_serialnum = 1;
5848 path->device->serial_num =
5849 kmalloc((serial_buf->length + 1),
5850 M_CAMXPT, M_INTWAIT);
5851 bcopy(serial_buf->serial_num,
5852 path->device->serial_num,
5853 serial_buf->length);
5854 path->device->serial_num_len = serial_buf->length;
5855 path->device->serial_num[serial_buf->length] = '\0';
5856 } else if (cam_periph_error(done_ccb, 0,
5857 SF_RETRY_UA|SF_NO_PRINT,
5858 &softc->saved_ccb) == ERESTART) {
5859 return;
5860 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5861 /* Don't wedge the queue */
5862 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5863 /*run_queue*/TRUE);
5864 }
5865
5866 /*
5867 * Let's see if we have seen this device before.
5868 */
5869 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
5870 MD5_CTX context;
5871 u_int8_t digest[16];
5872
5873 MD5Init(&context);
5874
5875 MD5Update(&context,
5876 (unsigned char *)&path->device->inq_data,
5877 sizeof(struct scsi_inquiry_data));
5878
5879 if (have_serialnum)
5880 MD5Update(&context, serial_buf->serial_num,
5881 serial_buf->length);
5882
5883 MD5Final(digest, &context);
5884 if (bcmp(softc->digest, digest, 16) == 0)
5885 changed = 0;
5886
5887 /*
5888 * XXX Do we need to do a TUR in order to ensure
5889 * that the device really hasn't changed???
5890 */
5891 if ((changed != 0)
5892 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
5893 xpt_async(AC_LOST_DEVICE, path, NULL);
5894 }
5895 if (serial_buf != NULL)
5896 kfree(serial_buf, M_TEMP);
5897
5898 if (changed != 0) {
5899 /*
5900 * Now that we have all the necessary
5901 * information to safely perform transfer
5902 * negotiations... Controllers don't perform
5903 * any negotiation or tagged queuing until
5904 * after the first XPT_SET_TRAN_SETTINGS ccb is
5905 * received. So, on a new device, just retreive
5906 * the user settings, and set them as the current
5907 * settings to set the device up.
5908 */
5909 proberequestdefaultnegotiation(periph);
5910 xpt_release_ccb(done_ccb);
5911
5912 /*
5913 * Perform a TUR to allow the controller to
5914 * perform any necessary transfer negotiation.
5915 */
5916 softc->action = PROBE_TUR_FOR_NEGOTIATION;
5917 xpt_schedule(periph, priority);
5918 return;
5919 }
5920 xpt_release_ccb(done_ccb);
5921 break;
5922 }
5923 case PROBE_TUR_FOR_NEGOTIATION:
5924 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5925 /* Don't wedge the queue */
5926 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5927 /*run_queue*/TRUE);
5928 }
5929
5930 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5931 xpt_reference_device(path->device);
5932
5933 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
5934 /* Inform the XPT that a new device has been found */
5935 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5936 xpt_action(done_ccb);
5937
5938 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
5939 done_ccb);
5940 }
5941 xpt_release_ccb(done_ccb);
5942 break;
5943 }
5944 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5945 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
5946 done_ccb->ccb_h.status = CAM_REQ_CMP;
5947 xpt_done(done_ccb);
5948 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
5949 cam_periph_invalidate(periph);
5950 cam_periph_release(periph);
5951 } else {
5952 probeschedule(periph);
5953 }
5954 }
5955
5956 static void
5957 probecleanup(struct cam_periph *periph)
5958 {
5959 kfree(periph->softc, M_TEMP);
5960 }
5961
5962 static void
5963 xpt_find_quirk(struct cam_ed *device)
5964 {
5965 caddr_t match;
5966
5967 match = cam_quirkmatch((caddr_t)&device->inq_data,
5968 (caddr_t)xpt_quirk_table,
5969 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
5970 sizeof(*xpt_quirk_table), scsi_inquiry_match);
5971
5972 if (match == NULL)
5973 panic("xpt_find_quirk: device didn't match wildcard entry!!");
5974
5975 device->quirk = (struct xpt_quirk_entry *)match;
5976 }
5977
5978 static int
5979 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS)
5980 {
5981 int error, bool;
5982
5983 bool = cam_srch_hi;
5984 error = sysctl_handle_int(oidp, &bool, sizeof(bool), req);
5985 if (error != 0 || req->newptr == NULL)
5986 return (error);
5987 if (bool == 0 || bool == 1) {
5988 cam_srch_hi = bool;
5989 return (0);
5990 } else {
5991 return (EINVAL);
5992 }
5993 }
5994
5995 static void
5996 xpt_devise_transport(struct cam_path *path)
5997 {
5998 struct ccb_pathinq cpi;
5999 struct ccb_trans_settings cts;
6000 struct scsi_inquiry_data *inq_buf;
6001
6002 /* Get transport information from the SIM */
6003 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
6004 cpi.ccb_h.func_code = XPT_PATH_INQ;
6005 xpt_action((union ccb *)&cpi);
6006
6007 inq_buf = NULL;
6008 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0)
6009 inq_buf = &path->device->inq_data;
6010 path->device->protocol = PROTO_SCSI;
6011 path->device->protocol_version =
6012 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version;
6013 path->device->transport = cpi.transport;
6014 path->device->transport_version = cpi.transport_version;
6015
6016 /*
6017 * Any device not using SPI3 features should
6018 * be considered SPI2 or lower.
6019 */
6020 if (inq_buf != NULL) {
6021 if (path->device->transport == XPORT_SPI
6022 && (inq_buf->spi3data & SID_SPI_MASK) == 0
6023 && path->device->transport_version > 2)
6024 path->device->transport_version = 2;
6025 } else {
6026 struct cam_ed* otherdev;
6027
6028 for (otherdev = TAILQ_FIRST(&path->target->ed_entries);
6029 otherdev != NULL;
6030 otherdev = TAILQ_NEXT(otherdev, links)) {
6031 if (otherdev != path->device)
6032 break;
6033 }
6034
6035 if (otherdev != NULL) {
6036 /*
6037 * Initially assume the same versioning as
6038 * prior luns for this target.
6039 */
6040 path->device->protocol_version =
6041 otherdev->protocol_version;
6042 path->device->transport_version =
6043 otherdev->transport_version;
6044 } else {
6045 /* Until we know better, opt for safty */
6046 path->device->protocol_version = 2;
6047 if (path->device->transport == XPORT_SPI)
6048 path->device->transport_version = 2;
6049 else
6050 path->device->transport_version = 0;
6051 }
6052 }
6053
6054 /*
6055 * XXX
6056 * For a device compliant with SPC-2 we should be able
6057 * to determine the transport version supported by
6058 * scrutinizing the version descriptors in the
6059 * inquiry buffer.
6060 */
6061
6062 /* Tell the controller what we think */
6063 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
6064 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
6065 cts.type = CTS_TYPE_CURRENT_SETTINGS;
6066 cts.transport = path->device->transport;
6067 cts.transport_version = path->device->transport_version;
6068 cts.protocol = path->device->protocol;
6069 cts.protocol_version = path->device->protocol_version;
6070 cts.proto_specific.valid = 0;
6071 cts.xport_specific.valid = 0;
6072 xpt_action((union ccb *)&cts);
6073 }
6074
6075 static void
6076 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
6077 int async_update)
6078 {
6079 struct ccb_pathinq cpi;
6080 struct ccb_trans_settings cur_cts;
6081 struct ccb_trans_settings_scsi *scsi;
6082 struct ccb_trans_settings_scsi *cur_scsi;
6083 struct cam_sim *sim;
6084 struct scsi_inquiry_data *inq_data;
6085
6086 if (device == NULL) {
6087 cts->ccb_h.status = CAM_PATH_INVALID;
6088 xpt_done((union ccb *)cts);
6089 return;
6090 }
6091
6092 if (cts->protocol == PROTO_UNKNOWN
6093 || cts->protocol == PROTO_UNSPECIFIED) {
6094 cts->protocol = device->protocol;
6095 cts->protocol_version = device->protocol_version;
6096 }
6097
6098 if (cts->protocol_version == PROTO_VERSION_UNKNOWN
6099 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED)
6100 cts->protocol_version = device->protocol_version;
6101
6102 if (cts->protocol != device->protocol) {
6103 xpt_print_path(cts->ccb_h.path);
6104 kprintf("Uninitialized Protocol %x:%x?\n",
6105 cts->protocol, device->protocol);
6106 cts->protocol = device->protocol;
6107 }
6108
6109 if (cts->protocol_version > device->protocol_version) {
6110 if (bootverbose) {
6111 xpt_print_path(cts->ccb_h.path);
6112 kprintf("Down reving Protocol Version from %d to %d?\n",
6113 cts->protocol_version, device->protocol_version);
6114 }
6115 cts->protocol_version = device->protocol_version;
6116 }
6117
6118 if (cts->transport == XPORT_UNKNOWN
6119 || cts->transport == XPORT_UNSPECIFIED) {
6120 cts->transport = device->transport;
6121 cts->transport_version = device->transport_version;
6122 }
6123
6124 if (cts->transport_version == XPORT_VERSION_UNKNOWN
6125 || cts->transport_version == XPORT_VERSION_UNSPECIFIED)
6126 cts->transport_version = device->transport_version;
6127
6128 if (cts->transport != device->transport) {
6129 xpt_print_path(cts->ccb_h.path);
6130 kprintf("Uninitialized Transport %x:%x?\n",
6131 cts->transport, device->transport);
6132 cts->transport = device->transport;
6133 }
6134
6135 if (cts->transport_version > device->transport_version) {
6136 if (bootverbose) {
6137 xpt_print_path(cts->ccb_h.path);
6138 kprintf("Down reving Transport Version from %d to %d?\n",
6139 cts->transport_version,
6140 device->transport_version);
6141 }
6142 cts->transport_version = device->transport_version;
6143 }
6144
6145 sim = cts->ccb_h.path->bus->sim;
6146
6147 /*
6148 * Nothing more of interest to do unless
6149 * this is a device connected via the
6150 * SCSI protocol.
6151 */
6152 if (cts->protocol != PROTO_SCSI) {
6153 if (async_update == FALSE)
6154 (*(sim->sim_action))(sim, (union ccb *)cts);
6155 return;
6156 }
6157
6158 inq_data = &device->inq_data;
6159 scsi = &cts->proto_specific.scsi;
6160 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
6161 cpi.ccb_h.func_code = XPT_PATH_INQ;
6162 xpt_action((union ccb *)&cpi);
6163
6164 /* SCSI specific sanity checking */
6165 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
6166 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0
6167 || (device->queue_flags & SCP_QUEUE_DQUE) != 0
6168 || (device->quirk->mintags == 0)) {
6169 /*
6170 * Can't tag on hardware that doesn't support tags,
6171 * doesn't have it enabled, or has broken tag support.
6172 */
6173 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6174 }
6175
6176 if (async_update == FALSE) {
6177 /*
6178 * Perform sanity checking against what the
6179 * controller and device can do.
6180 */
6181 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
6182 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
6183 cur_cts.type = cts->type;
6184 xpt_action((union ccb *)&cur_cts);
6185 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
6186 return;
6187 }
6188 cur_scsi = &cur_cts.proto_specific.scsi;
6189 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) {
6190 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6191 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB;
6192 }
6193 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0)
6194 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6195 }
6196
6197 /* SPI specific sanity checking */
6198 if (cts->transport == XPORT_SPI && async_update == FALSE) {
6199 u_int spi3caps;
6200 struct ccb_trans_settings_spi *spi;
6201 struct ccb_trans_settings_spi *cur_spi;
6202
6203 spi = &cts->xport_specific.spi;
6204
6205 cur_spi = &cur_cts.xport_specific.spi;
6206
6207 /* Fill in any gaps in what the user gave us */
6208 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6209 spi->sync_period = cur_spi->sync_period;
6210 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6211 spi->sync_period = 0;
6212 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6213 spi->sync_offset = cur_spi->sync_offset;
6214 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6215 spi->sync_offset = 0;
6216 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6217 spi->ppr_options = cur_spi->ppr_options;
6218 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6219 spi->ppr_options = 0;
6220 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6221 spi->bus_width = cur_spi->bus_width;
6222 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6223 spi->bus_width = 0;
6224 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) {
6225 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6226 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB;
6227 }
6228 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0)
6229 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6230 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6231 && (inq_data->flags & SID_Sync) == 0
6232 && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6233 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
6234 || (spi->sync_offset == 0)
6235 || (spi->sync_period == 0)) {
6236 /* Force async */
6237 spi->sync_period = 0;
6238 spi->sync_offset = 0;
6239 }
6240
6241 switch (spi->bus_width) {
6242 case MSG_EXT_WDTR_BUS_32_BIT:
6243 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6244 || (inq_data->flags & SID_WBus32) != 0
6245 || cts->type == CTS_TYPE_USER_SETTINGS)
6246 && (cpi.hba_inquiry & PI_WIDE_32) != 0)
6247 break;
6248 /* Fall Through to 16-bit */
6249 case MSG_EXT_WDTR_BUS_16_BIT:
6250 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6251 || (inq_data->flags & SID_WBus16) != 0
6252 || cts->type == CTS_TYPE_USER_SETTINGS)
6253 && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
6254 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
6255 break;
6256 }
6257 /* Fall Through to 8-bit */
6258 default: /* New bus width?? */
6259 case MSG_EXT_WDTR_BUS_8_BIT:
6260 /* All targets can do this */
6261 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
6262 break;
6263 }
6264
6265 spi3caps = cpi.xport_specific.spi.ppr_options;
6266 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6267 && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6268 spi3caps &= inq_data->spi3data;
6269
6270 if ((spi3caps & SID_SPI_CLOCK_DT) == 0)
6271 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;
6272
6273 if ((spi3caps & SID_SPI_IUS) == 0)
6274 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;
6275
6276 if ((spi3caps & SID_SPI_QAS) == 0)
6277 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
6278
6279 /* No SPI Transfer settings are allowed unless we are wide */
6280 if (spi->bus_width == 0)
6281 spi->ppr_options = 0;
6282
6283 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) {
6284 /*
6285 * Can't tag queue without disconnection.
6286 */
6287 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6288 scsi->valid |= CTS_SCSI_VALID_TQ;
6289 }
6290
6291 /*
6292 * If we are currently performing tagged transactions to
6293 * this device and want to change its negotiation parameters,
6294 * go non-tagged for a bit to give the controller a chance to
6295 * negotiate unhampered by tag messages.
6296 */
6297 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6298 && (device->inq_flags & SID_CmdQue) != 0
6299 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6300 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE|
6301 CTS_SPI_VALID_SYNC_OFFSET|
6302 CTS_SPI_VALID_BUS_WIDTH)) != 0)
6303 xpt_toggle_tags(cts->ccb_h.path);
6304 }
6305
6306 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6307 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
6308 int device_tagenb;
6309
6310 /*
6311 * If we are transitioning from tags to no-tags or
6312 * vice-versa, we need to carefully freeze and restart
6313 * the queue so that we don't overlap tagged and non-tagged
6314 * commands. We also temporarily stop tags if there is
6315 * a change in transfer negotiation settings to allow
6316 * "tag-less" negotiation.
6317 */
6318 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6319 || (device->inq_flags & SID_CmdQue) != 0)
6320 device_tagenb = TRUE;
6321 else
6322 device_tagenb = FALSE;
6323
6324 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6325 && device_tagenb == FALSE)
6326 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0
6327 && device_tagenb == TRUE)) {
6328
6329 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
6330 /*
6331 * Delay change to use tags until after a
6332 * few commands have gone to this device so
6333 * the controller has time to perform transfer
6334 * negotiations without tagged messages getting
6335 * in the way.
6336 */
6337 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
6338 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
6339 } else {
6340 struct ccb_relsim crs;
6341
6342 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
6343 device->inq_flags &= ~SID_CmdQue;
6344 xpt_dev_ccbq_resize(cts->ccb_h.path,
6345 sim->max_dev_openings);
6346 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6347 device->tag_delay_count = 0;
6348
6349 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
6350 /*priority*/1);
6351 crs.ccb_h.func_code = XPT_REL_SIMQ;
6352 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6353 crs.openings
6354 = crs.release_timeout
6355 = crs.qfrozen_cnt
6356 = 0;
6357 xpt_action((union ccb *)&crs);
6358 }
6359 }
6360 }
6361 if (async_update == FALSE)
6362 (*(sim->sim_action))(sim, (union ccb *)cts);
6363 }
6364
6365 static void
6366 xpt_toggle_tags(struct cam_path *path)
6367 {
6368 struct cam_ed *dev;
6369
6370 /*
6371 * Give controllers a chance to renegotiate
6372 * before starting tag operations. We
6373 * "toggle" tagged queuing off then on
6374 * which causes the tag enable command delay
6375 * counter to come into effect.
6376 */
6377 dev = path->device;
6378 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6379 || ((dev->inq_flags & SID_CmdQue) != 0
6380 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
6381 struct ccb_trans_settings cts;
6382
6383 xpt_setup_ccb(&cts.ccb_h, path, 1);
6384 cts.protocol = PROTO_SCSI;
6385 cts.protocol_version = PROTO_VERSION_UNSPECIFIED;
6386 cts.transport = XPORT_UNSPECIFIED;
6387 cts.transport_version = XPORT_VERSION_UNSPECIFIED;
6388 cts.proto_specific.scsi.flags = 0;
6389 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ;
6390 xpt_set_transfer_settings(&cts, path->device,
6391 /*async_update*/TRUE);
6392 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB;
6393 xpt_set_transfer_settings(&cts, path->device,
6394 /*async_update*/TRUE);
6395 }
6396 }
6397
6398 static void
6399 xpt_start_tags(struct cam_path *path)
6400 {
6401 struct ccb_relsim crs;
6402 struct cam_ed *device;
6403 struct cam_sim *sim;
6404 int newopenings;
6405
6406 device = path->device;
6407 sim = path->bus->sim;
6408 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6409 xpt_freeze_devq(path, /*count*/1);
6410 device->inq_flags |= SID_CmdQue;
6411 if (device->tag_saved_openings != 0)
6412 newopenings = device->tag_saved_openings;
6413 else
6414 newopenings = min(device->quirk->maxtags,
6415 sim->max_tagged_dev_openings);
6416 xpt_dev_ccbq_resize(path, newopenings);
6417 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1);
6418 crs.ccb_h.func_code = XPT_REL_SIMQ;
6419 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6420 crs.openings
6421 = crs.release_timeout
6422 = crs.qfrozen_cnt
6423 = 0;
6424 xpt_action((union ccb *)&crs);
6425 }
6426
6427 static int busses_to_config;
6428 static int busses_to_reset;
6429
6430 static int
6431 xptconfigbuscountfunc(struct cam_eb *bus, void *arg)
6432 {
6433 if (bus->path_id != CAM_XPT_PATH_ID) {
6434 struct cam_path path;
6435 struct ccb_pathinq cpi;
6436 int can_negotiate;
6437
6438 busses_to_config++;
6439 xpt_compile_path(&path, NULL, bus->path_id,
6440 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
6441 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
6442 cpi.ccb_h.func_code = XPT_PATH_INQ;
6443 xpt_action((union ccb *)&cpi);
6444 can_negotiate = cpi.hba_inquiry;
6445 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6446 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0
6447 && can_negotiate)
6448 busses_to_reset++;
6449 xpt_release_path(&path);
6450 }
6451
6452 return(1);
6453 }
6454
6455 static int
6456 xptconfigfunc(struct cam_eb *bus, void *arg)
6457 {
6458 struct cam_path *path;
6459 union ccb *work_ccb;
6460
6461 if (bus->path_id != CAM_XPT_PATH_ID) {
6462 cam_status status;
6463 int can_negotiate;
6464
6465 work_ccb = xpt_alloc_ccb();
6466 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id,
6467 CAM_TARGET_WILDCARD,
6468 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){
6469 kprintf("xptconfigfunc: xpt_create_path failed with "
6470 "status %#x for bus %d\n", status, bus->path_id);
6471 kprintf("xptconfigfunc: halting bus configuration\n");
6472 xpt_free_ccb(work_ccb);
6473 busses_to_config--;
6474 xpt_finishconfig(xpt_periph, NULL);
6475 return(0);
6476 }
6477 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6478 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
6479 xpt_action(work_ccb);
6480 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
6481 kprintf("xptconfigfunc: CPI failed on bus %d "
6482 "with status %d\n", bus->path_id,
6483 work_ccb->ccb_h.status);
6484 xpt_finishconfig(xpt_periph, work_ccb);
6485 return(1);
6486 }
6487
6488 can_negotiate = work_ccb->cpi.hba_inquiry;
6489 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6490 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0
6491 && (can_negotiate != 0)) {
6492 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6493 work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6494 work_ccb->ccb_h.cbfcnp = NULL;
6495 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE,
6496 ("Resetting Bus\n"));
6497 xpt_action(work_ccb);
6498 xpt_finishconfig(xpt_periph, work_ccb);
6499 } else {
6500 /* Act as though we performed a successful BUS RESET */
6501 work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6502 xpt_finishconfig(xpt_periph, work_ccb);
6503 }
6504 }
6505
6506 return(1);
6507 }
6508
6509 static void
6510 xpt_config(void *arg)
6511 {
6512 /*
6513 * Now that interrupts are enabled, go find our devices
6514 */
6515
6516 #ifdef CAMDEBUG
6517 /* Setup debugging flags and path */
6518 #ifdef CAM_DEBUG_FLAGS
6519 cam_dflags = CAM_DEBUG_FLAGS;
6520 #else /* !CAM_DEBUG_FLAGS */
6521 cam_dflags = CAM_DEBUG_NONE;
6522 #endif /* CAM_DEBUG_FLAGS */
6523 #ifdef CAM_DEBUG_BUS
6524 if (cam_dflags != CAM_DEBUG_NONE) {
6525 if (xpt_create_path(&cam_dpath, xpt_periph,
6526 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
6527 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
6528 kprintf("xpt_config: xpt_create_path() failed for debug"
6529 " target %d:%d:%d, debugging disabled\n",
6530 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
6531 cam_dflags = CAM_DEBUG_NONE;
6532 }
6533 } else
6534 cam_dpath = NULL;
6535 #else /* !CAM_DEBUG_BUS */
6536 cam_dpath = NULL;
6537 #endif /* CAM_DEBUG_BUS */
6538 #endif /* CAMDEBUG */
6539
6540 /*
6541 * Scan all installed busses.
6542 */
6543 xpt_for_all_busses(xptconfigbuscountfunc, NULL);
6544
6545 if (busses_to_config == 0) {
6546 /* Call manually because we don't have any busses */
6547 xpt_finishconfig(xpt_periph, NULL);
6548 } else {
6549 if (busses_to_reset > 0 && scsi_delay >= 2000) {
6550 kprintf("Waiting %d seconds for SCSI "
6551 "devices to settle\n", scsi_delay/1000);
6552 }
6553 xpt_for_all_busses(xptconfigfunc, NULL);
6554 }
6555 }
6556
6557 /*
6558 * If the given device only has one peripheral attached to it, and if that
6559 * peripheral is the passthrough driver, announce it. This insures that the
6560 * user sees some sort of announcement for every peripheral in their system.
6561 */
6562 static int
6563 xptpassannouncefunc(struct cam_ed *device, void *arg)
6564 {
6565 struct cam_periph *periph;
6566 int i;
6567
6568 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
6569 periph = SLIST_NEXT(periph, periph_links), i++);
6570
6571 periph = SLIST_FIRST(&device->periphs);
6572 if ((i == 1)
6573 && (strncmp(periph->periph_name, "pass", 4) == 0))
6574 xpt_announce_periph(periph, NULL);
6575
6576 return(1);
6577 }
6578
6579 static void
6580 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
6581 {
6582 struct periph_driver **p_drv;
6583 int i;
6584
6585 if (done_ccb != NULL) {
6586 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
6587 ("xpt_finishconfig\n"));
6588 switch(done_ccb->ccb_h.func_code) {
6589 case XPT_RESET_BUS:
6590 if (done_ccb->ccb_h.status == CAM_REQ_CMP) {
6591 done_ccb->ccb_h.func_code = XPT_SCAN_BUS;
6592 done_ccb->ccb_h.cbfcnp = xpt_finishconfig;
6593 done_ccb->crcn.flags = 0;
6594 xpt_action(done_ccb);
6595 return;
6596 }
6597 /* FALLTHROUGH */
6598 case XPT_SCAN_BUS:
6599 default:
6600 xpt_free_path(done_ccb->ccb_h.path);
6601 busses_to_config--;
6602 break;
6603 }
6604 }
6605
6606 if (busses_to_config == 0) {
6607 /* Register all the peripheral drivers */
6608 /* XXX This will have to change when we have loadable modules */
6609 p_drv = periph_drivers;
6610 for (i = 0; p_drv[i] != NULL; i++) {
6611 (*p_drv[i]->init)();
6612 }
6613
6614 /*
6615 * Check for devices with no "standard" peripheral driver
6616 * attached. For any devices like that, announce the
6617 * passthrough driver so the user will see something.
6618 */
6619 xpt_for_all_devices(xptpassannouncefunc, NULL);
6620
6621 /* Release our hook so that the boot can continue. */
6622 config_intrhook_disestablish(xpt_config_hook);
6623 kfree(xpt_config_hook, M_TEMP);
6624 xpt_config_hook = NULL;
6625 }
6626 if (done_ccb != NULL)
6627 xpt_free_ccb(done_ccb);
6628 }
6629
6630 static void
6631 xptaction(struct cam_sim *sim, union ccb *work_ccb)
6632 {
6633 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
6634
6635 switch (work_ccb->ccb_h.func_code) {
6636 /* Common cases first */
6637 case XPT_PATH_INQ: /* Path routing inquiry */
6638 {
6639 struct ccb_pathinq *cpi;
6640
6641 cpi = &work_ccb->cpi;
6642 cpi->version_num = 1; /* XXX??? */
6643 cpi->hba_inquiry = 0;
6644 cpi->target_sprt = 0;
6645 cpi->hba_misc = 0;
6646 cpi->hba_eng_cnt = 0;
6647 cpi->max_target = 0;
6648 cpi->max_lun = 0;
6649 cpi->initiator_id = 0;
6650 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
6651 strncpy(cpi->hba_vid, "", HBA_IDLEN);
6652 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
6653 cpi->unit_number = sim->unit_number;
6654 cpi->bus_id = sim->bus_id;
6655 cpi->base_transfer_speed = 0;
6656 cpi->protocol = PROTO_UNSPECIFIED;
6657 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
6658 cpi->transport = XPORT_UNSPECIFIED;
6659 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
6660 cpi->ccb_h.status = CAM_REQ_CMP;
6661 xpt_done(work_ccb);
6662 break;
6663 }
6664 default:
6665 work_ccb->ccb_h.status = CAM_REQ_INVALID;
6666 xpt_done(work_ccb);
6667 break;
6668 }
6669 }
6670
6671 /*
6672 * The xpt as a "controller" has no interrupt sources, so polling
6673 * is a no-op.
6674 */
6675 static void
6676 xptpoll(struct cam_sim *sim)
6677 {
6678 }
6679
6680 /*
6681 * Should only be called by the machine interrupt dispatch routines,
6682 * so put these prototypes here instead of in the header.
6683 */
6684
6685 static void
6686 swi_cambio(void *arg, void *frame)
6687 {
6688 camisr(&cam_bioq);
6689 }
6690
6691 static void
6692 camisr(cam_isrq_t *queue)
6693 {
6694 struct ccb_hdr *ccb_h;
6695
6696 crit_enter();
6697 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) {
6698 int runq;
6699
6700 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe);
6701 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
6702 splz();
6703
6704 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
6705 ("camisr\n"));
6706
6707 runq = FALSE;
6708
6709 if (ccb_h->flags & CAM_HIGH_POWER) {
6710 struct highpowerlist *hphead;
6711 struct cam_ed *device;
6712 union ccb *send_ccb;
6713
6714 hphead = &highpowerq;
6715
6716 send_ccb = (union ccb *)STAILQ_FIRST(hphead);
6717
6718 /*
6719 * Increment the count since this command is done.
6720 */
6721 num_highpower++;
6722
6723 /*
6724 * Any high powered commands queued up?
6725 */
6726 if (send_ccb != NULL) {
6727 device = send_ccb->ccb_h.path->device;
6728
6729 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe);
6730
6731 xpt_release_devq(send_ccb->ccb_h.path,
6732 /*count*/1, /*runqueue*/TRUE);
6733 }
6734 }
6735 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
6736 struct cam_ed *dev;
6737
6738 dev = ccb_h->path->device;
6739
6740 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
6741
6742 if (!SIM_DEAD(ccb_h->path->bus->sim)) {
6743 ccb_h->path->bus->sim->devq->send_active--;
6744 ccb_h->path->bus->sim->devq->send_openings++;
6745 }
6746
6747 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
6748 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)
6749 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
6750 && (dev->ccbq.dev_active == 0))) {
6751
6752 xpt_release_devq(ccb_h->path, /*count*/1,
6753 /*run_queue*/TRUE);
6754 }
6755
6756 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6757 && (--dev->tag_delay_count == 0))
6758 xpt_start_tags(ccb_h->path);
6759
6760 if ((dev->ccbq.queue.entries > 0)
6761 && (dev->qfrozen_cnt == 0)
6762 && (device_is_send_queued(dev) == 0)) {
6763 runq = xpt_schedule_dev_sendq(ccb_h->path->bus,
6764 dev);
6765 }
6766 }
6767
6768 if (ccb_h->status & CAM_RELEASE_SIMQ) {
6769 xpt_release_simq(ccb_h->path->bus->sim,
6770 /*run_queue*/TRUE);
6771 ccb_h->status &= ~CAM_RELEASE_SIMQ;
6772 runq = FALSE;
6773 }
6774
6775 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
6776 && (ccb_h->status & CAM_DEV_QFRZN)) {
6777 xpt_release_devq(ccb_h->path, /*count*/1,
6778 /*run_queue*/TRUE);
6779 ccb_h->status &= ~CAM_DEV_QFRZN;
6780 } else if (runq) {
6781 xpt_run_dev_sendq(ccb_h->path->bus);
6782 }
6783
6784 /* Call the peripheral driver's callback */
6785 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
6786 }
6787 crit_exit();
6788 }
6789
6790 static void
6791 dead_sim_action(struct cam_sim *sim, union ccb *ccb)
6792 {
6793
6794 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
6795 xpt_done(ccb);
6796 }
6797
6798 static void
6799 dead_sim_poll(struct cam_sim *sim)
6800 {
6801 }
DragonFly BSD