FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_xpt.c
1 /*-
2 * Implementation of the Common Access Method Transport (XPT) layer.
3 *
4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: src/sys/cam/cam_xpt.c,v 1.155.2.2 2006/02/26 22:38:39 iedowse Exp $");
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/systm.h>
36 #include <sys/types.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
39 #include <sys/time.h>
40 #include <sys/conf.h>
41 #include <sys/fcntl.h>
42 #include <sys/md5.h>
43 #include <sys/interrupt.h>
44 #include <sys/sbuf.h>
45
46 #include <sys/lock.h>
47 #include <sys/mutex.h>
48 #include <sys/sysctl.h>
49
50 #ifdef PC98
51 #include <pc98/pc98/pc98_machdep.h> /* geometry translation */
52 #endif
53
54 #include <cam/cam.h>
55 #include <cam/cam_ccb.h>
56 #include <cam/cam_periph.h>
57 #include <cam/cam_sim.h>
58 #include <cam/cam_xpt.h>
59 #include <cam/cam_xpt_sim.h>
60 #include <cam/cam_xpt_periph.h>
61 #include <cam/cam_debug.h>
62
63 #include <cam/scsi/scsi_all.h>
64 #include <cam/scsi/scsi_message.h>
65 #include <cam/scsi/scsi_pass.h>
66 #include "opt_cam.h"
67
68 /* Datastructures internal to the xpt layer */
69 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
70
71 /*
72 * Definition of an async handler callback block. These are used to add
73 * SIMs and peripherals to the async callback lists.
74 */
75 struct async_node {
76 SLIST_ENTRY(async_node) links;
77 u_int32_t event_enable; /* Async Event enables */
78 void (*callback)(void *arg, u_int32_t code,
79 struct cam_path *path, void *args);
80 void *callback_arg;
81 };
82
83 SLIST_HEAD(async_list, async_node);
84 SLIST_HEAD(periph_list, cam_periph);
85 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
86
87 /*
88 * This is the maximum number of high powered commands (e.g. start unit)
89 * that can be outstanding at a particular time.
90 */
91 #ifndef CAM_MAX_HIGHPOWER
92 #define CAM_MAX_HIGHPOWER 4
93 #endif
94
95 /* number of high powered commands that can go through right now */
96 static int num_highpower = CAM_MAX_HIGHPOWER;
97
98 /*
99 * Structure for queueing a device in a run queue.
100 * There is one run queue for allocating new ccbs,
101 * and another for sending ccbs to the controller.
102 */
103 struct cam_ed_qinfo {
104 cam_pinfo pinfo;
105 struct cam_ed *device;
106 };
107
108 /*
109 * The CAM EDT (Existing Device Table) contains the device information for
110 * all devices for all busses in the system. The table contains a
111 * cam_ed structure for each device on the bus.
112 */
113 struct cam_ed {
114 TAILQ_ENTRY(cam_ed) links;
115 struct cam_ed_qinfo alloc_ccb_entry;
116 struct cam_ed_qinfo send_ccb_entry;
117 struct cam_et *target;
118 lun_id_t lun_id;
119 struct camq drvq; /*
120 * Queue of type drivers wanting to do
121 * work on this device.
122 */
123 struct cam_ccbq ccbq; /* Queue of pending ccbs */
124 struct async_list asyncs; /* Async callback info for this B/T/L */
125 struct periph_list periphs; /* All attached devices */
126 u_int generation; /* Generation number */
127 struct cam_periph *owner; /* Peripheral driver's ownership tag */
128 struct xpt_quirk_entry *quirk; /* Oddities about this device */
129 /* Storage for the inquiry data */
130 #ifdef CAM_NEW_TRAN_CODE
131 cam_proto protocol;
132 u_int protocol_version;
133 cam_xport transport;
134 u_int transport_version;
135 #endif /* CAM_NEW_TRAN_CODE */
136 struct scsi_inquiry_data inq_data;
137 u_int8_t inq_flags; /*
138 * Current settings for inquiry flags.
139 * This allows us to override settings
140 * like disconnection and tagged
141 * queuing for a device.
142 */
143 u_int8_t queue_flags; /* Queue flags from the control page */
144 u_int8_t serial_num_len;
145 u_int8_t *serial_num;
146 u_int32_t qfrozen_cnt;
147 u_int32_t flags;
148 #define CAM_DEV_UNCONFIGURED 0x01
149 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02
150 #define CAM_DEV_REL_ON_COMPLETE 0x04
151 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08
152 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10
153 #define CAM_DEV_TAG_AFTER_COUNT 0x20
154 #define CAM_DEV_INQUIRY_DATA_VALID 0x40
155 u_int32_t tag_delay_count;
156 #define CAM_TAG_DELAY_COUNT 5
157 u_int32_t tag_saved_openings;
158 u_int32_t refcount;
159 struct callout_handle c_handle;
160 };
161
162 /*
163 * Each target is represented by an ET (Existing Target). These
164 * entries are created when a target is successfully probed with an
165 * identify, and removed when a device fails to respond after a number
166 * of retries, or a bus rescan finds the device missing.
167 */
168 struct cam_et {
169 TAILQ_HEAD(, cam_ed) ed_entries;
170 TAILQ_ENTRY(cam_et) links;
171 struct cam_eb *bus;
172 target_id_t target_id;
173 u_int32_t refcount;
174 u_int generation;
175 struct timeval last_reset;
176 };
177
178 /*
179 * Each bus is represented by an EB (Existing Bus). These entries
180 * are created by calls to xpt_bus_register and deleted by calls to
181 * xpt_bus_deregister.
182 */
183 struct cam_eb {
184 TAILQ_HEAD(, cam_et) et_entries;
185 TAILQ_ENTRY(cam_eb) links;
186 path_id_t path_id;
187 struct cam_sim *sim;
188 struct timeval last_reset;
189 u_int32_t flags;
190 #define CAM_EB_RUNQ_SCHEDULED 0x01
191 u_int32_t refcount;
192 u_int generation;
193 };
194
195 struct cam_path {
196 struct cam_periph *periph;
197 struct cam_eb *bus;
198 struct cam_et *target;
199 struct cam_ed *device;
200 };
201
202 struct xpt_quirk_entry {
203 struct scsi_inquiry_pattern inq_pat;
204 u_int8_t quirks;
205 #define CAM_QUIRK_NOLUNS 0x01
206 #define CAM_QUIRK_NOSERIAL 0x02
207 #define CAM_QUIRK_HILUNS 0x04
208 #define CAM_QUIRK_NOHILUNS 0x08
209 u_int mintags;
210 u_int maxtags;
211 };
212
213 static int cam_srch_hi = 0;
214 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi);
215 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS);
216 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0,
217 sysctl_cam_search_luns, "I",
218 "allow search above LUN 7 for SCSI3 and greater devices");
219
220 #define CAM_SCSI2_MAXLUN 8
221 /*
222 * If we're not quirked to search <= the first 8 luns
223 * and we are either quirked to search above lun 8,
224 * or we're > SCSI-2 and we've enabled hilun searching,
225 * or we're > SCSI-2 and the last lun was a success,
226 * we can look for luns above lun 8.
227 */
228 #define CAN_SRCH_HI_SPARSE(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 && cam_srch_hi)))
232
233 #define CAN_SRCH_HI_DENSE(dv) \
234 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \
235 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \
236 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2)))
237
238 typedef enum {
239 XPT_FLAG_OPEN = 0x01
240 } xpt_flags;
241
242 struct xpt_softc {
243 xpt_flags flags;
244 u_int32_t generation;
245 };
246
247 static const char quantum[] = "QUANTUM";
248 static const char sony[] = "SONY";
249 static const char west_digital[] = "WDIGTL";
250 static const char samsung[] = "SAMSUNG";
251 static const char seagate[] = "SEAGATE";
252 static const char microp[] = "MICROP";
253
254 static struct xpt_quirk_entry xpt_quirk_table[] =
255 {
256 {
257 /* Reports QUEUE FULL for temporary resource shortages */
258 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
259 /*quirks*/0, /*mintags*/24, /*maxtags*/32
260 },
261 {
262 /* Reports QUEUE FULL for temporary resource shortages */
263 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
264 /*quirks*/0, /*mintags*/24, /*maxtags*/32
265 },
266 {
267 /* Reports QUEUE FULL for temporary resource shortages */
268 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
269 /*quirks*/0, /*mintags*/24, /*maxtags*/32
270 },
271 {
272 /* Broken tagged queuing drive */
273 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
274 /*quirks*/0, /*mintags*/0, /*maxtags*/
275 },
276 {
277 /* Broken tagged queuing drive */
278 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
279 /*quirks*/0, /*mintags*/0, /*maxtags*/
280 },
281 {
282 /* Broken tagged queuing drive */
283 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
284 /*quirks*/0, /*mintags*/0, /*maxtags*/
285 },
286 {
287 /*
288 * Unfortunately, the Quantum Atlas III has the same
289 * problem as the Atlas II drives above.
290 * Reported by: "Johan Granlund" <johan@granlund.nu>
291 *
292 * For future reference, the drive with the problem was:
293 * QUANTUM QM39100TD-SW N1B0
294 *
295 * It's possible that Quantum will fix the problem in later
296 * firmware revisions. If that happens, the quirk entry
297 * will need to be made specific to the firmware revisions
298 * with the problem.
299 *
300 */
301 /* Reports QUEUE FULL for temporary resource shortages */
302 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
303 /*quirks*/0, /*mintags*/24, /*maxtags*/32
304 },
305 {
306 /*
307 * 18 Gig Atlas III, same problem as the 9G version.
308 * Reported by: Andre Albsmeier
309 * <andre.albsmeier@mchp.siemens.de>
310 *
311 * For future reference, the drive with the problem was:
312 * QUANTUM QM318000TD-S N491
313 */
314 /* Reports QUEUE FULL for temporary resource shortages */
315 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
316 /*quirks*/0, /*mintags*/24, /*maxtags*/32
317 },
318 {
319 /*
320 * Broken tagged queuing drive
321 * Reported by: Bret Ford <bford@uop.cs.uop.edu>
322 * and: Martin Renters <martin@tdc.on.ca>
323 */
324 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
325 /*quirks*/0, /*mintags*/0, /*maxtags*/
326 },
327 /*
328 * The Seagate Medalist Pro drives have very poor write
329 * performance with anything more than 2 tags.
330 *
331 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl>
332 * Drive: <SEAGATE ST36530N 1444>
333 *
334 * Reported by: Jeremy Lea <reg@shale.csir.co.za>
335 * Drive: <SEAGATE ST34520W 1281>
336 *
337 * No one has actually reported that the 9G version
338 * (ST39140*) of the Medalist Pro has the same problem, but
339 * we're assuming that it does because the 4G and 6.5G
340 * versions of the drive are broken.
341 */
342 {
343 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
344 /*quirks*/0, /*mintags*/2, /*maxtags*/2
345 },
346 {
347 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
348 /*quirks*/0, /*mintags*/2, /*maxtags*/2
349 },
350 {
351 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
352 /*quirks*/0, /*mintags*/2, /*maxtags*/2
353 },
354 {
355 /*
356 * Slow when tagged queueing is enabled. Write performance
357 * steadily drops off with more and more concurrent
358 * transactions. Best sequential write performance with
359 * tagged queueing turned off and write caching turned on.
360 *
361 * PR: kern/10398
362 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp>
363 * Drive: DCAS-34330 w/ "S65A" firmware.
364 *
365 * The drive with the problem had the "S65A" firmware
366 * revision, and has also been reported (by Stephen J.
367 * Roznowski <sjr@home.net>) for a drive with the "S61A"
368 * firmware revision.
369 *
370 * Although no one has reported problems with the 2 gig
371 * version of the DCAS drive, the assumption is that it
372 * has the same problems as the 4 gig version. Therefore
373 * this quirk entries disables tagged queueing for all
374 * DCAS drives.
375 */
376 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
377 /*quirks*/0, /*mintags*/0, /*maxtags*/
378 },
379 {
380 /* Broken tagged queuing drive */
381 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
382 /*quirks*/0, /*mintags*/0, /*maxtags*/
383 },
384 {
385 /* Broken tagged queuing drive */
386 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
387 /*quirks*/0, /*mintags*/0, /*maxtags*/
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*/
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*/
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*/
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*/
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*/
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*/
455 },
456 {
457 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
458 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
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*/
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*/
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*/
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*/
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*/
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*/
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*/
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*/
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*/
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*/
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 /* Default tagged queuing parameters for all devices */
591 {
592 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
593 /*vendor*/"*", /*product*/"*", /*revision*/"*"
594 },
595 /*quirks*/0, /*mintags*/2, /*maxtags*/255
596 },
597 };
598
599 static const int xpt_quirk_table_size =
600 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
601
602 typedef enum {
603 DM_RET_COPY = 0x01,
604 DM_RET_FLAG_MASK = 0x0f,
605 DM_RET_NONE = 0x00,
606 DM_RET_STOP = 0x10,
607 DM_RET_DESCEND = 0x20,
608 DM_RET_ERROR = 0x30,
609 DM_RET_ACTION_MASK = 0xf0
610 } dev_match_ret;
611
612 typedef enum {
613 XPT_DEPTH_BUS,
614 XPT_DEPTH_TARGET,
615 XPT_DEPTH_DEVICE,
616 XPT_DEPTH_PERIPH
617 } xpt_traverse_depth;
618
619 struct xpt_traverse_config {
620 xpt_traverse_depth depth;
621 void *tr_func;
622 void *tr_arg;
623 };
624
625 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
626 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
627 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
628 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
629 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
630
631 /* Transport layer configuration information */
632 static struct xpt_softc xsoftc;
633
634 /* Queues for our software interrupt handler */
635 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
636 static cam_isrq_t cam_bioq;
637 static struct mtx cam_bioq_lock;
638
639 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */
640 static SLIST_HEAD(,ccb_hdr) ccb_freeq;
641 static u_int xpt_max_ccbs; /*
642 * Maximum size of ccb pool. Modified as
643 * devices are added/removed or have their
644 * opening counts changed.
645 */
646 static u_int xpt_ccb_count; /* Current count of allocated ccbs */
647
648 struct cam_periph *xpt_periph;
649
650 static periph_init_t xpt_periph_init;
651
652 static periph_init_t probe_periph_init;
653
654 static struct periph_driver xpt_driver =
655 {
656 xpt_periph_init, "xpt",
657 TAILQ_HEAD_INITIALIZER(xpt_driver.units)
658 };
659
660 static struct periph_driver probe_driver =
661 {
662 probe_periph_init, "probe",
663 TAILQ_HEAD_INITIALIZER(probe_driver.units)
664 };
665
666 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
667 PERIPHDRIVER_DECLARE(probe, probe_driver);
668
669
670 static d_open_t xptopen;
671 static d_close_t xptclose;
672 static d_ioctl_t xptioctl;
673
674 static struct cdevsw xpt_cdevsw = {
675 .d_version = D_VERSION,
676 .d_flags = D_NEEDGIANT,
677 .d_open = xptopen,
678 .d_close = xptclose,
679 .d_ioctl = xptioctl,
680 .d_name = "xpt",
681 };
682
683 static struct intr_config_hook *xpt_config_hook;
684
685 static void dead_sim_action(struct cam_sim *sim, union ccb *ccb);
686 static void dead_sim_poll(struct cam_sim *sim);
687
688 /* Dummy SIM that is used when the real one has gone. */
689 static struct cam_sim cam_dead_sim = {
690 .sim_action = dead_sim_action,
691 .sim_poll = dead_sim_poll,
692 .sim_name = "dead_sim",
693 };
694
695 #define SIM_DEAD(sim) ((sim) == &cam_dead_sim)
696
697 /* Registered busses */
698 static TAILQ_HEAD(,cam_eb) xpt_busses;
699 static u_int bus_generation;
700
701 /* Storage for debugging datastructures */
702 #ifdef CAMDEBUG
703 struct cam_path *cam_dpath;
704 u_int32_t cam_dflags;
705 u_int32_t cam_debug_delay;
706 #endif
707
708 /* Pointers to software interrupt handlers */
709 static void *cambio_ih;
710
711 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
712 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
713 #endif
714
715 /*
716 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
717 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS,
718 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
719 */
720 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
721 || defined(CAM_DEBUG_LUN)
722 #ifdef CAMDEBUG
723 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
724 || !defined(CAM_DEBUG_LUN)
725 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
726 and CAM_DEBUG_LUN"
727 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
728 #else /* !CAMDEBUG */
729 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
730 #endif /* CAMDEBUG */
731 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
732
733 /* Our boot-time initialization hook */
734 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
735
736 static moduledata_t cam_moduledata = {
737 "cam",
738 cam_module_event_handler,
739 NULL
740 };
741
742 static void xpt_init(void *);
743
744 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
745 MODULE_VERSION(cam, 1);
746
747
748 static cam_status xpt_compile_path(struct cam_path *new_path,
749 struct cam_periph *perph,
750 path_id_t path_id,
751 target_id_t target_id,
752 lun_id_t lun_id);
753
754 static void xpt_release_path(struct cam_path *path);
755
756 static void xpt_async_bcast(struct async_list *async_head,
757 u_int32_t async_code,
758 struct cam_path *path,
759 void *async_arg);
760 static void xpt_dev_async(u_int32_t async_code,
761 struct cam_eb *bus,
762 struct cam_et *target,
763 struct cam_ed *device,
764 void *async_arg);
765 static path_id_t xptnextfreepathid(void);
766 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
767 static union ccb *xpt_get_ccb(struct cam_ed *device);
768 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
769 u_int32_t new_priority);
770 static void xpt_run_dev_allocq(struct cam_eb *bus);
771 static void xpt_run_dev_sendq(struct cam_eb *bus);
772 static timeout_t xpt_release_devq_timeout;
773 static timeout_t xpt_release_simq_timeout;
774 static void xpt_release_bus(struct cam_eb *bus);
775 static void xpt_release_devq_device(struct cam_ed *dev, u_int count,
776 int run_queue);
777 static struct cam_et*
778 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
779 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target);
780 static struct cam_ed*
781 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
782 lun_id_t lun_id);
783 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target,
784 struct cam_ed *device);
785 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
786 static struct cam_eb*
787 xpt_find_bus(path_id_t path_id);
788 static struct cam_et*
789 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
790 static struct cam_ed*
791 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
792 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
793 static void xpt_scan_lun(struct cam_periph *periph,
794 struct cam_path *path, cam_flags flags,
795 union ccb *ccb);
796 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb);
797 static xpt_busfunc_t xptconfigbuscountfunc;
798 static xpt_busfunc_t xptconfigfunc;
799 static void xpt_config(void *arg);
800 static xpt_devicefunc_t xptpassannouncefunc;
801 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
802 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
803 static void xptpoll(struct cam_sim *sim);
804 static void camisr(void *);
805 #if 0
806 static void xptstart(struct cam_periph *periph, union ccb *work_ccb);
807 static void xptasync(struct cam_periph *periph,
808 u_int32_t code, cam_path *path);
809 #endif
810 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
811 u_int num_patterns, struct cam_eb *bus);
812 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
813 u_int num_patterns,
814 struct cam_ed *device);
815 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
816 u_int num_patterns,
817 struct cam_periph *periph);
818 static xpt_busfunc_t xptedtbusfunc;
819 static xpt_targetfunc_t xptedttargetfunc;
820 static xpt_devicefunc_t xptedtdevicefunc;
821 static xpt_periphfunc_t xptedtperiphfunc;
822 static xpt_pdrvfunc_t xptplistpdrvfunc;
823 static xpt_periphfunc_t xptplistperiphfunc;
824 static int xptedtmatch(struct ccb_dev_match *cdm);
825 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
826 static int xptbustraverse(struct cam_eb *start_bus,
827 xpt_busfunc_t *tr_func, void *arg);
828 static int xpttargettraverse(struct cam_eb *bus,
829 struct cam_et *start_target,
830 xpt_targetfunc_t *tr_func, void *arg);
831 static int xptdevicetraverse(struct cam_et *target,
832 struct cam_ed *start_device,
833 xpt_devicefunc_t *tr_func, void *arg);
834 static int xptperiphtraverse(struct cam_ed *device,
835 struct cam_periph *start_periph,
836 xpt_periphfunc_t *tr_func, void *arg);
837 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
838 xpt_pdrvfunc_t *tr_func, void *arg);
839 static int xptpdperiphtraverse(struct periph_driver **pdrv,
840 struct cam_periph *start_periph,
841 xpt_periphfunc_t *tr_func,
842 void *arg);
843 static xpt_busfunc_t xptdefbusfunc;
844 static xpt_targetfunc_t xptdeftargetfunc;
845 static xpt_devicefunc_t xptdefdevicefunc;
846 static xpt_periphfunc_t xptdefperiphfunc;
847 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
848 #ifdef notusedyet
849 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func,
850 void *arg);
851 #endif
852 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func,
853 void *arg);
854 #ifdef notusedyet
855 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func,
856 void *arg);
857 #endif
858 static xpt_devicefunc_t xptsetasyncfunc;
859 static xpt_busfunc_t xptsetasyncbusfunc;
860 static cam_status xptregister(struct cam_periph *periph,
861 void *arg);
862 static cam_status proberegister(struct cam_periph *periph,
863 void *arg);
864 static void probeschedule(struct cam_periph *probe_periph);
865 static void probestart(struct cam_periph *periph, union ccb *start_ccb);
866 static void proberequestdefaultnegotiation(struct cam_periph *periph);
867 static void probedone(struct cam_periph *periph, union ccb *done_ccb);
868 static void probecleanup(struct cam_periph *periph);
869 static void xpt_find_quirk(struct cam_ed *device);
870 #ifdef CAM_NEW_TRAN_CODE
871 static void xpt_devise_transport(struct cam_path *path);
872 #endif /* CAM_NEW_TRAN_CODE */
873 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts,
874 struct cam_ed *device,
875 int async_update);
876 static void xpt_toggle_tags(struct cam_path *path);
877 static void xpt_start_tags(struct cam_path *path);
878 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
879 struct cam_ed *dev);
880 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
881 struct cam_ed *dev);
882 static __inline int periph_is_queued(struct cam_periph *periph);
883 static __inline int device_is_alloc_queued(struct cam_ed *device);
884 static __inline int device_is_send_queued(struct cam_ed *device);
885 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
886
887 static __inline int
888 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
889 {
890 int retval;
891
892 if (dev->ccbq.devq_openings > 0) {
893 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
894 cam_ccbq_resize(&dev->ccbq,
895 dev->ccbq.dev_openings
896 + dev->ccbq.dev_active);
897 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
898 }
899 /*
900 * The priority of a device waiting for CCB resources
901 * is that of the the highest priority peripheral driver
902 * enqueued.
903 */
904 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
905 &dev->alloc_ccb_entry.pinfo,
906 CAMQ_GET_HEAD(&dev->drvq)->priority);
907 } else {
908 retval = 0;
909 }
910
911 return (retval);
912 }
913
914 static __inline int
915 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
916 {
917 int retval;
918
919 if (dev->ccbq.dev_openings > 0) {
920 /*
921 * The priority of a device waiting for controller
922 * resources is that of the the highest priority CCB
923 * enqueued.
924 */
925 retval =
926 xpt_schedule_dev(&bus->sim->devq->send_queue,
927 &dev->send_ccb_entry.pinfo,
928 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
929 } else {
930 retval = 0;
931 }
932 return (retval);
933 }
934
935 static __inline int
936 periph_is_queued(struct cam_periph *periph)
937 {
938 return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
939 }
940
941 static __inline int
942 device_is_alloc_queued(struct cam_ed *device)
943 {
944 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
945 }
946
947 static __inline int
948 device_is_send_queued(struct cam_ed *device)
949 {
950 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
951 }
952
953 static __inline int
954 dev_allocq_is_runnable(struct cam_devq *devq)
955 {
956 /*
957 * Have work to do.
958 * Have space to do more work.
959 * Allowed to do work.
960 */
961 return ((devq->alloc_queue.qfrozen_cnt == 0)
962 && (devq->alloc_queue.entries > 0)
963 && (devq->alloc_openings > 0));
964 }
965
966 static void
967 xpt_periph_init()
968 {
969 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
970 }
971
972 static void
973 probe_periph_init()
974 {
975 }
976
977
978 static void
979 xptdone(struct cam_periph *periph, union ccb *done_ccb)
980 {
981 /* Caller will release the CCB */
982 wakeup(&done_ccb->ccb_h.cbfcnp);
983 }
984
985 static int
986 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
987 {
988 int unit;
989
990 unit = minor(dev) & 0xff;
991
992 /*
993 * Only allow read-write access.
994 */
995 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
996 return(EPERM);
997
998 /*
999 * We don't allow nonblocking access.
1000 */
1001 if ((flags & O_NONBLOCK) != 0) {
1002 printf("xpt%d: can't do nonblocking access\n", unit);
1003 return(ENODEV);
1004 }
1005
1006 /*
1007 * We only have one transport layer right now. If someone accesses
1008 * us via something other than minor number 1, point out their
1009 * mistake.
1010 */
1011 if (unit != 0) {
1012 printf("xptopen: got invalid xpt unit %d\n", unit);
1013 return(ENXIO);
1014 }
1015
1016 /* Mark ourselves open */
1017 xsoftc.flags |= XPT_FLAG_OPEN;
1018
1019 return(0);
1020 }
1021
1022 static int
1023 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1024 {
1025 int unit;
1026
1027 unit = minor(dev) & 0xff;
1028
1029 /*
1030 * We only have one transport layer right now. If someone accesses
1031 * us via something other than minor number 1, point out their
1032 * mistake.
1033 */
1034 if (unit != 0) {
1035 printf("xptclose: got invalid xpt unit %d\n", unit);
1036 return(ENXIO);
1037 }
1038
1039 /* Mark ourselves closed */
1040 xsoftc.flags &= ~XPT_FLAG_OPEN;
1041
1042 return(0);
1043 }
1044
1045 static int
1046 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1047 {
1048 int unit, error;
1049
1050 error = 0;
1051 unit = minor(dev) & 0xff;
1052
1053 /*
1054 * We only have one transport layer right now. If someone accesses
1055 * us via something other than minor number 1, point out their
1056 * mistake.
1057 */
1058 if (unit != 0) {
1059 printf("xptioctl: got invalid xpt unit %d\n", unit);
1060 return(ENXIO);
1061 }
1062
1063 switch(cmd) {
1064 /*
1065 * For the transport layer CAMIOCOMMAND ioctl, we really only want
1066 * to accept CCB types that don't quite make sense to send through a
1067 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
1068 * in the CAM spec.
1069 */
1070 case CAMIOCOMMAND: {
1071 union ccb *ccb;
1072 union ccb *inccb;
1073
1074 inccb = (union ccb *)addr;
1075
1076 switch(inccb->ccb_h.func_code) {
1077 case XPT_SCAN_BUS:
1078 case XPT_RESET_BUS:
1079 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
1080 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
1081 error = EINVAL;
1082 break;
1083 }
1084 /* FALLTHROUGH */
1085 case XPT_PATH_INQ:
1086 case XPT_ENG_INQ:
1087 case XPT_SCAN_LUN:
1088
1089 ccb = xpt_alloc_ccb();
1090
1091 /*
1092 * Create a path using the bus, target, and lun the
1093 * user passed in.
1094 */
1095 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1096 inccb->ccb_h.path_id,
1097 inccb->ccb_h.target_id,
1098 inccb->ccb_h.target_lun) !=
1099 CAM_REQ_CMP){
1100 error = EINVAL;
1101 xpt_free_ccb(ccb);
1102 break;
1103 }
1104 /* Ensure all of our fields are correct */
1105 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1106 inccb->ccb_h.pinfo.priority);
1107 xpt_merge_ccb(ccb, inccb);
1108 ccb->ccb_h.cbfcnp = xptdone;
1109 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1110 bcopy(ccb, inccb, sizeof(union ccb));
1111 xpt_free_path(ccb->ccb_h.path);
1112 xpt_free_ccb(ccb);
1113 break;
1114
1115 case XPT_DEBUG: {
1116 union ccb ccb;
1117
1118 /*
1119 * This is an immediate CCB, so it's okay to
1120 * allocate it on the stack.
1121 */
1122
1123 /*
1124 * Create a path using the bus, target, and lun the
1125 * user passed in.
1126 */
1127 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1128 inccb->ccb_h.path_id,
1129 inccb->ccb_h.target_id,
1130 inccb->ccb_h.target_lun) !=
1131 CAM_REQ_CMP){
1132 error = EINVAL;
1133 break;
1134 }
1135 /* Ensure all of our fields are correct */
1136 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1137 inccb->ccb_h.pinfo.priority);
1138 xpt_merge_ccb(&ccb, inccb);
1139 ccb.ccb_h.cbfcnp = xptdone;
1140 xpt_action(&ccb);
1141 bcopy(&ccb, inccb, sizeof(union ccb));
1142 xpt_free_path(ccb.ccb_h.path);
1143 break;
1144
1145 }
1146 case XPT_DEV_MATCH: {
1147 struct cam_periph_map_info mapinfo;
1148 struct cam_path *old_path;
1149
1150 /*
1151 * We can't deal with physical addresses for this
1152 * type of transaction.
1153 */
1154 if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1155 error = EINVAL;
1156 break;
1157 }
1158
1159 /*
1160 * Save this in case the caller had it set to
1161 * something in particular.
1162 */
1163 old_path = inccb->ccb_h.path;
1164
1165 /*
1166 * We really don't need a path for the matching
1167 * code. The path is needed because of the
1168 * debugging statements in xpt_action(). They
1169 * assume that the CCB has a valid path.
1170 */
1171 inccb->ccb_h.path = xpt_periph->path;
1172
1173 bzero(&mapinfo, sizeof(mapinfo));
1174
1175 /*
1176 * Map the pattern and match buffers into kernel
1177 * virtual address space.
1178 */
1179 error = cam_periph_mapmem(inccb, &mapinfo);
1180
1181 if (error) {
1182 inccb->ccb_h.path = old_path;
1183 break;
1184 }
1185
1186 /*
1187 * This is an immediate CCB, we can send it on directly.
1188 */
1189 xpt_action(inccb);
1190
1191 /*
1192 * Map the buffers back into user space.
1193 */
1194 cam_periph_unmapmem(inccb, &mapinfo);
1195
1196 inccb->ccb_h.path = old_path;
1197
1198 error = 0;
1199 break;
1200 }
1201 default:
1202 error = ENOTSUP;
1203 break;
1204 }
1205 break;
1206 }
1207 /*
1208 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1209 * with the periphal driver name and unit name filled in. The other
1210 * fields don't really matter as input. The passthrough driver name
1211 * ("pass"), and unit number are passed back in the ccb. The current
1212 * device generation number, and the index into the device peripheral
1213 * driver list, and the status are also passed back. Note that
1214 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1215 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
1216 * (or rather should be) impossible for the device peripheral driver
1217 * list to change since we look at the whole thing in one pass, and
1218 * we do it with splcam protection.
1219 *
1220 */
1221 case CAMGETPASSTHRU: {
1222 union ccb *ccb;
1223 struct cam_periph *periph;
1224 struct periph_driver **p_drv;
1225 char *name;
1226 u_int unit;
1227 u_int cur_generation;
1228 int base_periph_found;
1229 int splbreaknum;
1230 int s;
1231
1232 ccb = (union ccb *)addr;
1233 unit = ccb->cgdl.unit_number;
1234 name = ccb->cgdl.periph_name;
1235 /*
1236 * Every 100 devices, we want to drop our spl protection to
1237 * give the software interrupt handler a chance to run.
1238 * Most systems won't run into this check, but this should
1239 * avoid starvation in the software interrupt handler in
1240 * large systems.
1241 */
1242 splbreaknum = 100;
1243
1244 ccb = (union ccb *)addr;
1245
1246 base_periph_found = 0;
1247
1248 /*
1249 * Sanity check -- make sure we don't get a null peripheral
1250 * driver name.
1251 */
1252 if (*ccb->cgdl.periph_name == '\0') {
1253 error = EINVAL;
1254 break;
1255 }
1256
1257 /* Keep the list from changing while we traverse it */
1258 s = splcam();
1259 ptstartover:
1260 cur_generation = xsoftc.generation;
1261
1262 /* first find our driver in the list of drivers */
1263 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
1264 if (strcmp((*p_drv)->driver_name, name) == 0)
1265 break;
1266
1267 if (*p_drv == NULL) {
1268 splx(s);
1269 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1270 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1271 *ccb->cgdl.periph_name = '\0';
1272 ccb->cgdl.unit_number = 0;
1273 error = ENOENT;
1274 break;
1275 }
1276
1277 /*
1278 * Run through every peripheral instance of this driver
1279 * and check to see whether it matches the unit passed
1280 * in by the user. If it does, get out of the loops and
1281 * find the passthrough driver associated with that
1282 * peripheral driver.
1283 */
1284 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1285 periph = TAILQ_NEXT(periph, unit_links)) {
1286
1287 if (periph->unit_number == unit) {
1288 break;
1289 } else if (--splbreaknum == 0) {
1290 splx(s);
1291 s = splcam();
1292 splbreaknum = 100;
1293 if (cur_generation != xsoftc.generation)
1294 goto ptstartover;
1295 }
1296 }
1297 /*
1298 * If we found the peripheral driver that the user passed
1299 * in, go through all of the peripheral drivers for that
1300 * particular device and look for a passthrough driver.
1301 */
1302 if (periph != NULL) {
1303 struct cam_ed *device;
1304 int i;
1305
1306 base_periph_found = 1;
1307 device = periph->path->device;
1308 for (i = 0, periph = SLIST_FIRST(&device->periphs);
1309 periph != NULL;
1310 periph = SLIST_NEXT(periph, periph_links), i++) {
1311 /*
1312 * Check to see whether we have a
1313 * passthrough device or not.
1314 */
1315 if (strcmp(periph->periph_name, "pass") == 0) {
1316 /*
1317 * Fill in the getdevlist fields.
1318 */
1319 strcpy(ccb->cgdl.periph_name,
1320 periph->periph_name);
1321 ccb->cgdl.unit_number =
1322 periph->unit_number;
1323 if (SLIST_NEXT(periph, periph_links))
1324 ccb->cgdl.status =
1325 CAM_GDEVLIST_MORE_DEVS;
1326 else
1327 ccb->cgdl.status =
1328 CAM_GDEVLIST_LAST_DEVICE;
1329 ccb->cgdl.generation =
1330 device->generation;
1331 ccb->cgdl.index = i;
1332 /*
1333 * Fill in some CCB header fields
1334 * that the user may want.
1335 */
1336 ccb->ccb_h.path_id =
1337 periph->path->bus->path_id;
1338 ccb->ccb_h.target_id =
1339 periph->path->target->target_id;
1340 ccb->ccb_h.target_lun =
1341 periph->path->device->lun_id;
1342 ccb->ccb_h.status = CAM_REQ_CMP;
1343 break;
1344 }
1345 }
1346 }
1347
1348 /*
1349 * If the periph is null here, one of two things has
1350 * happened. The first possibility is that we couldn't
1351 * find the unit number of the particular peripheral driver
1352 * that the user is asking about. e.g. the user asks for
1353 * the passthrough driver for "da11". We find the list of
1354 * "da" peripherals all right, but there is no unit 11.
1355 * The other possibility is that we went through the list
1356 * of peripheral drivers attached to the device structure,
1357 * but didn't find one with the name "pass". Either way,
1358 * we return ENOENT, since we couldn't find something.
1359 */
1360 if (periph == NULL) {
1361 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1362 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1363 *ccb->cgdl.periph_name = '\0';
1364 ccb->cgdl.unit_number = 0;
1365 error = ENOENT;
1366 /*
1367 * It is unfortunate that this is even necessary,
1368 * but there are many, many clueless users out there.
1369 * If this is true, the user is looking for the
1370 * passthrough driver, but doesn't have one in his
1371 * kernel.
1372 */
1373 if (base_periph_found == 1) {
1374 printf("xptioctl: pass driver is not in the "
1375 "kernel\n");
1376 printf("xptioctl: put \"device pass0\" in "
1377 "your kernel config file\n");
1378 }
1379 }
1380 splx(s);
1381 break;
1382 }
1383 default:
1384 error = ENOTTY;
1385 break;
1386 }
1387
1388 return(error);
1389 }
1390
1391 static int
1392 cam_module_event_handler(module_t mod, int what, void *arg)
1393 {
1394 if (what == MOD_LOAD) {
1395 xpt_init(NULL);
1396 } else if (what == MOD_UNLOAD) {
1397 return EBUSY;
1398 } else {
1399 return EOPNOTSUPP;
1400 }
1401
1402 return 0;
1403 }
1404
1405 /* Functions accessed by the peripheral drivers */
1406 static void
1407 xpt_init(dummy)
1408 void *dummy;
1409 {
1410 struct cam_sim *xpt_sim;
1411 struct cam_path *path;
1412 struct cam_devq *devq;
1413 cam_status status;
1414
1415 TAILQ_INIT(&xpt_busses);
1416 TAILQ_INIT(&cam_bioq);
1417 SLIST_INIT(&ccb_freeq);
1418 STAILQ_INIT(&highpowerq);
1419
1420 mtx_init(&cam_bioq_lock, "CAM BIOQ lock", NULL, MTX_DEF);
1421
1422 /*
1423 * The xpt layer is, itself, the equivelent of a SIM.
1424 * Allow 16 ccbs in the ccb pool for it. This should
1425 * give decent parallelism when we probe busses and
1426 * perform other XPT functions.
1427 */
1428 devq = cam_simq_alloc(16);
1429 xpt_sim = cam_sim_alloc(xptaction,
1430 xptpoll,
1431 "xpt",
1432 /*softc*/NULL,
1433 /*unit*/0,
1434 /*max_dev_transactions*/0,
1435 /*max_tagged_dev_transactions*/0,
1436 devq);
1437 xpt_max_ccbs = 16;
1438
1439 xpt_bus_register(xpt_sim, /*bus #*/0);
1440
1441 /*
1442 * Looking at the XPT from the SIM layer, the XPT is
1443 * the equivelent of a peripheral driver. Allocate
1444 * a peripheral driver entry for us.
1445 */
1446 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1447 CAM_TARGET_WILDCARD,
1448 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1449 printf("xpt_init: xpt_create_path failed with status %#x,"
1450 " failing attach\n", status);
1451 return;
1452 }
1453
1454 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1455 path, NULL, 0, NULL);
1456 xpt_free_path(path);
1457
1458 xpt_sim->softc = xpt_periph;
1459
1460 /*
1461 * Register a callback for when interrupts are enabled.
1462 */
1463 xpt_config_hook =
1464 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
1465 M_TEMP, M_NOWAIT | M_ZERO);
1466 if (xpt_config_hook == NULL) {
1467 printf("xpt_init: Cannot malloc config hook "
1468 "- failing attach\n");
1469 return;
1470 }
1471
1472 xpt_config_hook->ich_func = xpt_config;
1473 if (config_intrhook_establish(xpt_config_hook) != 0) {
1474 free (xpt_config_hook, M_TEMP);
1475 printf("xpt_init: config_intrhook_establish failed "
1476 "- failing attach\n");
1477 }
1478
1479 /* Install our software interrupt handlers */
1480 swi_add(NULL, "cambio", camisr, &cam_bioq, SWI_CAMBIO, 0, &cambio_ih);
1481 }
1482
1483 static cam_status
1484 xptregister(struct cam_periph *periph, void *arg)
1485 {
1486 if (periph == NULL) {
1487 printf("xptregister: periph was NULL!!\n");
1488 return(CAM_REQ_CMP_ERR);
1489 }
1490
1491 periph->softc = NULL;
1492
1493 xpt_periph = periph;
1494
1495 return(CAM_REQ_CMP);
1496 }
1497
1498 int32_t
1499 xpt_add_periph(struct cam_periph *periph)
1500 {
1501 struct cam_ed *device;
1502 int32_t status;
1503 struct periph_list *periph_head;
1504
1505 GIANT_REQUIRED;
1506
1507 device = periph->path->device;
1508
1509 periph_head = &device->periphs;
1510
1511 status = CAM_REQ_CMP;
1512
1513 if (device != NULL) {
1514 int s;
1515
1516 /*
1517 * Make room for this peripheral
1518 * so it will fit in the queue
1519 * when it's scheduled to run
1520 */
1521 s = splsoftcam();
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
1529 splx(s);
1530 }
1531
1532 xsoftc.generation++;
1533
1534 return (status);
1535 }
1536
1537 void
1538 xpt_remove_periph(struct cam_periph *periph)
1539 {
1540 struct cam_ed *device;
1541
1542 GIANT_REQUIRED;
1543
1544 device = periph->path->device;
1545
1546 if (device != NULL) {
1547 int s;
1548 struct periph_list *periph_head;
1549
1550 periph_head = &device->periphs;
1551
1552 /* Release the slot for this peripheral */
1553 s = splsoftcam();
1554 camq_resize(&device->drvq, device->drvq.array_size - 1);
1555
1556 device->generation++;
1557
1558 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1559
1560 splx(s);
1561 }
1562
1563 xsoftc.generation++;
1564
1565 }
1566
1567 #ifdef CAM_NEW_TRAN_CODE
1568
1569 void
1570 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1571 {
1572 struct ccb_pathinq cpi;
1573 struct ccb_trans_settings cts;
1574 struct cam_path *path;
1575 u_int speed;
1576 u_int freq;
1577 u_int mb;
1578 int s;
1579
1580 GIANT_REQUIRED;
1581
1582 path = periph->path;
1583 /*
1584 * To ensure that this is printed in one piece,
1585 * mask out CAM interrupts.
1586 */
1587 s = splsoftcam();
1588 printf("%s%d at %s%d bus %d target %d lun %d\n",
1589 periph->periph_name, periph->unit_number,
1590 path->bus->sim->sim_name,
1591 path->bus->sim->unit_number,
1592 path->bus->sim->bus_id,
1593 path->target->target_id,
1594 path->device->lun_id);
1595 printf("%s%d: ", periph->periph_name, periph->unit_number);
1596 scsi_print_inquiry(&path->device->inq_data);
1597 if (bootverbose && path->device->serial_num_len > 0) {
1598 /* Don't wrap the screen - print only the first 60 chars */
1599 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1600 periph->unit_number, path->device->serial_num);
1601 }
1602 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1603 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1604 cts.type = CTS_TYPE_CURRENT_SETTINGS;
1605 xpt_action((union ccb*)&cts);
1606
1607 /* Ask the SIM for its base transfer speed */
1608 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1609 cpi.ccb_h.func_code = XPT_PATH_INQ;
1610 xpt_action((union ccb *)&cpi);
1611
1612 speed = cpi.base_transfer_speed;
1613 freq = 0;
1614 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1615 struct ccb_trans_settings_spi *spi;
1616
1617 spi = &cts.xport_specific.spi;
1618 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0
1619 && spi->sync_offset != 0) {
1620 freq = scsi_calc_syncsrate(spi->sync_period);
1621 speed = freq;
1622 }
1623
1624 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0)
1625 speed *= (0x01 << spi->bus_width);
1626 }
1627
1628 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1629 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc;
1630 if (fc->valid & CTS_FC_VALID_SPEED) {
1631 speed = fc->bitrate;
1632 }
1633 }
1634
1635 mb = speed / 1000;
1636 if (mb > 0)
1637 printf("%s%d: %d.%03dMB/s transfers",
1638 periph->periph_name, periph->unit_number,
1639 mb, speed % 1000);
1640 else
1641 printf("%s%d: %dKB/s transfers", periph->periph_name,
1642 periph->unit_number, speed);
1643 /* Report additional information about SPI connections */
1644 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1645 struct ccb_trans_settings_spi *spi;
1646
1647 spi = &cts.xport_specific.spi;
1648 if (freq != 0) {
1649 printf(" (%d.%03dMHz%s, offset %d", freq / 1000,
1650 freq % 1000,
1651 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
1652 ? " DT" : "",
1653 spi->sync_offset);
1654 }
1655 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0
1656 && spi->bus_width > 0) {
1657 if (freq != 0) {
1658 printf(", ");
1659 } else {
1660 printf(" (");
1661 }
1662 printf("%dbit)", 8 * (0x01 << spi->bus_width));
1663 } else if (freq != 0) {
1664 printf(")");
1665 }
1666 }
1667 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1668 struct ccb_trans_settings_fc *fc;
1669
1670 fc = &cts.xport_specific.fc;
1671 if (fc->valid & CTS_FC_VALID_WWNN)
1672 printf(" WWNN 0x%llx", (long long) fc->wwnn);
1673 if (fc->valid & CTS_FC_VALID_WWPN)
1674 printf(" WWPN 0x%llx", (long long) fc->wwpn);
1675 if (fc->valid & CTS_FC_VALID_PORT)
1676 printf(" PortID 0x%x", fc->port);
1677 }
1678
1679 if (path->device->inq_flags & SID_CmdQue
1680 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1681 printf("\n%s%d: Tagged Queueing Enabled",
1682 periph->periph_name, periph->unit_number);
1683 }
1684 printf("\n");
1685
1686 /*
1687 * We only want to print the caller's announce string if they've
1688 * passed one in..
1689 */
1690 if (announce_string != NULL)
1691 printf("%s%d: %s\n", periph->periph_name,
1692 periph->unit_number, announce_string);
1693 splx(s);
1694 }
1695 #else /* CAM_NEW_TRAN_CODE */
1696 void
1697 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1698 {
1699 int s;
1700 u_int mb;
1701 struct cam_path *path;
1702 struct ccb_trans_settings cts;
1703
1704 GIANT_REQUIRED;
1705
1706 path = periph->path;
1707 /*
1708 * To ensure that this is printed in one piece,
1709 * mask out CAM interrupts.
1710 */
1711 s = splsoftcam();
1712 printf("%s%d at %s%d bus %d target %d lun %d\n",
1713 periph->periph_name, periph->unit_number,
1714 path->bus->sim->sim_name,
1715 path->bus->sim->unit_number,
1716 path->bus->sim->bus_id,
1717 path->target->target_id,
1718 path->device->lun_id);
1719 printf("%s%d: ", periph->periph_name, periph->unit_number);
1720 scsi_print_inquiry(&path->device->inq_data);
1721 if ((bootverbose)
1722 && (path->device->serial_num_len > 0)) {
1723 /* Don't wrap the screen - print only the first 60 chars */
1724 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1725 periph->unit_number, path->device->serial_num);
1726 }
1727 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1728 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1729 cts.flags = CCB_TRANS_CURRENT_SETTINGS;
1730 xpt_action((union ccb*)&cts);
1731 if (cts.ccb_h.status == CAM_REQ_CMP) {
1732 u_int speed;
1733 u_int freq;
1734
1735 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1736 && cts.sync_offset != 0) {
1737 freq = scsi_calc_syncsrate(cts.sync_period);
1738 speed = freq;
1739 } else {
1740 struct ccb_pathinq cpi;
1741
1742 /* Ask the SIM for its base transfer speed */
1743 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1744 cpi.ccb_h.func_code = XPT_PATH_INQ;
1745 xpt_action((union ccb *)&cpi);
1746
1747 speed = cpi.base_transfer_speed;
1748 freq = 0;
1749 }
1750 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0)
1751 speed *= (0x01 << cts.bus_width);
1752 mb = speed / 1000;
1753 if (mb > 0)
1754 printf("%s%d: %d.%03dMB/s transfers",
1755 periph->periph_name, periph->unit_number,
1756 mb, speed % 1000);
1757 else
1758 printf("%s%d: %dKB/s transfers", periph->periph_name,
1759 periph->unit_number, speed);
1760 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1761 && cts.sync_offset != 0) {
1762 printf(" (%d.%03dMHz, offset %d", freq / 1000,
1763 freq % 1000, cts.sync_offset);
1764 }
1765 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0
1766 && cts.bus_width > 0) {
1767 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1768 && cts.sync_offset != 0) {
1769 printf(", ");
1770 } else {
1771 printf(" (");
1772 }
1773 printf("%dbit)", 8 * (0x01 << cts.bus_width));
1774 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1775 && cts.sync_offset != 0) {
1776 printf(")");
1777 }
1778
1779 if (path->device->inq_flags & SID_CmdQue
1780 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1781 printf(", Tagged Queueing Enabled");
1782 }
1783
1784 printf("\n");
1785 } else if (path->device->inq_flags & SID_CmdQue
1786 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1787 printf("%s%d: Tagged Queueing Enabled\n",
1788 periph->periph_name, periph->unit_number);
1789 }
1790
1791 /*
1792 * We only want to print the caller's announce string if they've
1793 * passed one in..
1794 */
1795 if (announce_string != NULL)
1796 printf("%s%d: %s\n", periph->periph_name,
1797 periph->unit_number, announce_string);
1798 splx(s);
1799 }
1800
1801 #endif /* CAM_NEW_TRAN_CODE */
1802
1803 static dev_match_ret
1804 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1805 struct cam_eb *bus)
1806 {
1807 dev_match_ret retval;
1808 int i;
1809
1810 retval = DM_RET_NONE;
1811
1812 /*
1813 * If we aren't given something to match against, that's an error.
1814 */
1815 if (bus == NULL)
1816 return(DM_RET_ERROR);
1817
1818 /*
1819 * If there are no match entries, then this bus matches no
1820 * matter what.
1821 */
1822 if ((patterns == NULL) || (num_patterns == 0))
1823 return(DM_RET_DESCEND | DM_RET_COPY);
1824
1825 for (i = 0; i < num_patterns; i++) {
1826 struct bus_match_pattern *cur_pattern;
1827
1828 /*
1829 * If the pattern in question isn't for a bus node, we
1830 * aren't interested. However, we do indicate to the
1831 * calling routine that we should continue descending the
1832 * tree, since the user wants to match against lower-level
1833 * EDT elements.
1834 */
1835 if (patterns[i].type != DEV_MATCH_BUS) {
1836 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1837 retval |= DM_RET_DESCEND;
1838 continue;
1839 }
1840
1841 cur_pattern = &patterns[i].pattern.bus_pattern;
1842
1843 /*
1844 * If they want to match any bus node, we give them any
1845 * device node.
1846 */
1847 if (cur_pattern->flags == BUS_MATCH_ANY) {
1848 /* set the copy flag */
1849 retval |= DM_RET_COPY;
1850
1851 /*
1852 * If we've already decided on an action, go ahead
1853 * and return.
1854 */
1855 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1856 return(retval);
1857 }
1858
1859 /*
1860 * Not sure why someone would do this...
1861 */
1862 if (cur_pattern->flags == BUS_MATCH_NONE)
1863 continue;
1864
1865 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1866 && (cur_pattern->path_id != bus->path_id))
1867 continue;
1868
1869 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1870 && (cur_pattern->bus_id != bus->sim->bus_id))
1871 continue;
1872
1873 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1874 && (cur_pattern->unit_number != bus->sim->unit_number))
1875 continue;
1876
1877 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1878 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1879 DEV_IDLEN) != 0))
1880 continue;
1881
1882 /*
1883 * If we get to this point, the user definitely wants
1884 * information on this bus. So tell the caller to copy the
1885 * data out.
1886 */
1887 retval |= DM_RET_COPY;
1888
1889 /*
1890 * If the return action has been set to descend, then we
1891 * know that we've already seen a non-bus matching
1892 * expression, therefore we need to further descend the tree.
1893 * This won't change by continuing around the loop, so we
1894 * go ahead and return. If we haven't seen a non-bus
1895 * matching expression, we keep going around the loop until
1896 * we exhaust the matching expressions. We'll set the stop
1897 * flag once we fall out of the loop.
1898 */
1899 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1900 return(retval);
1901 }
1902
1903 /*
1904 * If the return action hasn't been set to descend yet, that means
1905 * we haven't seen anything other than bus matching patterns. So
1906 * tell the caller to stop descending the tree -- the user doesn't
1907 * want to match against lower level tree elements.
1908 */
1909 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1910 retval |= DM_RET_STOP;
1911
1912 return(retval);
1913 }
1914
1915 static dev_match_ret
1916 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1917 struct cam_ed *device)
1918 {
1919 dev_match_ret retval;
1920 int i;
1921
1922 retval = DM_RET_NONE;
1923
1924 /*
1925 * If we aren't given something to match against, that's an error.
1926 */
1927 if (device == NULL)
1928 return(DM_RET_ERROR);
1929
1930 /*
1931 * If there are no match entries, then this device matches no
1932 * matter what.
1933 */
1934 if ((patterns == NULL) || (num_patterns == 0))
1935 return(DM_RET_DESCEND | DM_RET_COPY);
1936
1937 for (i = 0; i < num_patterns; i++) {
1938 struct device_match_pattern *cur_pattern;
1939
1940 /*
1941 * If the pattern in question isn't for a device node, we
1942 * aren't interested.
1943 */
1944 if (patterns[i].type != DEV_MATCH_DEVICE) {
1945 if ((patterns[i].type == DEV_MATCH_PERIPH)
1946 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1947 retval |= DM_RET_DESCEND;
1948 continue;
1949 }
1950
1951 cur_pattern = &patterns[i].pattern.device_pattern;
1952
1953 /*
1954 * If they want to match any device node, we give them any
1955 * device node.
1956 */
1957 if (cur_pattern->flags == DEV_MATCH_ANY) {
1958 /* set the copy flag */
1959 retval |= DM_RET_COPY;
1960
1961
1962 /*
1963 * If we've already decided on an action, go ahead
1964 * and return.
1965 */
1966 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1967 return(retval);
1968 }
1969
1970 /*
1971 * Not sure why someone would do this...
1972 */
1973 if (cur_pattern->flags == DEV_MATCH_NONE)
1974 continue;
1975
1976 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1977 && (cur_pattern->path_id != device->target->bus->path_id))
1978 continue;
1979
1980 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1981 && (cur_pattern->target_id != device->target->target_id))
1982 continue;
1983
1984 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1985 && (cur_pattern->target_lun != device->lun_id))
1986 continue;
1987
1988 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1989 && (cam_quirkmatch((caddr_t)&device->inq_data,
1990 (caddr_t)&cur_pattern->inq_pat,
1991 1, sizeof(cur_pattern->inq_pat),
1992 scsi_static_inquiry_match) == NULL))
1993 continue;
1994
1995 /*
1996 * If we get to this point, the user definitely wants
1997 * information on this device. So tell the caller to copy
1998 * the data out.
1999 */
2000 retval |= DM_RET_COPY;
2001
2002 /*
2003 * If the return action has been set to descend, then we
2004 * know that we've already seen a peripheral matching
2005 * expression, therefore we need to further descend the tree.
2006 * This won't change by continuing around the loop, so we
2007 * go ahead and return. If we haven't seen a peripheral
2008 * matching expression, we keep going around the loop until
2009 * we exhaust the matching expressions. We'll set the stop
2010 * flag once we fall out of the loop.
2011 */
2012 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
2013 return(retval);
2014 }
2015
2016 /*
2017 * If the return action hasn't been set to descend yet, that means
2018 * we haven't seen any peripheral matching patterns. So tell the
2019 * caller to stop descending the tree -- the user doesn't want to
2020 * match against lower level tree elements.
2021 */
2022 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
2023 retval |= DM_RET_STOP;
2024
2025 return(retval);
2026 }
2027
2028 /*
2029 * Match a single peripheral against any number of match patterns.
2030 */
2031 static dev_match_ret
2032 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
2033 struct cam_periph *periph)
2034 {
2035 dev_match_ret retval;
2036 int i;
2037
2038 /*
2039 * If we aren't given something to match against, that's an error.
2040 */
2041 if (periph == NULL)
2042 return(DM_RET_ERROR);
2043
2044 /*
2045 * If there are no match entries, then this peripheral matches no
2046 * matter what.
2047 */
2048 if ((patterns == NULL) || (num_patterns == 0))
2049 return(DM_RET_STOP | DM_RET_COPY);
2050
2051 /*
2052 * There aren't any nodes below a peripheral node, so there's no
2053 * reason to descend the tree any further.
2054 */
2055 retval = DM_RET_STOP;
2056
2057 for (i = 0; i < num_patterns; i++) {
2058 struct periph_match_pattern *cur_pattern;
2059
2060 /*
2061 * If the pattern in question isn't for a peripheral, we
2062 * aren't interested.
2063 */
2064 if (patterns[i].type != DEV_MATCH_PERIPH)
2065 continue;
2066
2067 cur_pattern = &patterns[i].pattern.periph_pattern;
2068
2069 /*
2070 * If they want to match on anything, then we will do so.
2071 */
2072 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
2073 /* set the copy flag */
2074 retval |= DM_RET_COPY;
2075
2076 /*
2077 * We've already set the return action to stop,
2078 * since there are no nodes below peripherals in
2079 * the tree.
2080 */
2081 return(retval);
2082 }
2083
2084 /*
2085 * Not sure why someone would do this...
2086 */
2087 if (cur_pattern->flags == PERIPH_MATCH_NONE)
2088 continue;
2089
2090 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
2091 && (cur_pattern->path_id != periph->path->bus->path_id))
2092 continue;
2093
2094 /*
2095 * For the target and lun id's, we have to make sure the
2096 * target and lun pointers aren't NULL. The xpt peripheral
2097 * has a wildcard target and device.
2098 */
2099 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
2100 && ((periph->path->target == NULL)
2101 ||(cur_pattern->target_id != periph->path->target->target_id)))
2102 continue;
2103
2104 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
2105 && ((periph->path->device == NULL)
2106 || (cur_pattern->target_lun != periph->path->device->lun_id)))
2107 continue;
2108
2109 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
2110 && (cur_pattern->unit_number != periph->unit_number))
2111 continue;
2112
2113 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
2114 && (strncmp(cur_pattern->periph_name, periph->periph_name,
2115 DEV_IDLEN) != 0))
2116 continue;
2117
2118 /*
2119 * If we get to this point, the user definitely wants
2120 * information on this peripheral. So tell the caller to
2121 * copy the data out.
2122 */
2123 retval |= DM_RET_COPY;
2124
2125 /*
2126 * The return action has already been set to stop, since
2127 * peripherals don't have any nodes below them in the EDT.
2128 */
2129 return(retval);
2130 }
2131
2132 /*
2133 * If we get to this point, the peripheral that was passed in
2134 * doesn't match any of the patterns.
2135 */
2136 return(retval);
2137 }
2138
2139 static int
2140 xptedtbusfunc(struct cam_eb *bus, void *arg)
2141 {
2142 struct ccb_dev_match *cdm;
2143 dev_match_ret retval;
2144
2145 cdm = (struct ccb_dev_match *)arg;
2146
2147 /*
2148 * If our position is for something deeper in the tree, that means
2149 * that we've already seen this node. So, we keep going down.
2150 */
2151 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2152 && (cdm->pos.cookie.bus == bus)
2153 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2154 && (cdm->pos.cookie.target != NULL))
2155 retval = DM_RET_DESCEND;
2156 else
2157 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
2158
2159 /*
2160 * If we got an error, bail out of the search.
2161 */
2162 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2163 cdm->status = CAM_DEV_MATCH_ERROR;
2164 return(0);
2165 }
2166
2167 /*
2168 * If the copy flag is set, copy this bus out.
2169 */
2170 if (retval & DM_RET_COPY) {
2171 int spaceleft, j;
2172
2173 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2174 sizeof(struct dev_match_result));
2175
2176 /*
2177 * If we don't have enough space to put in another
2178 * match result, save our position and tell the
2179 * user there are more devices to check.
2180 */
2181 if (spaceleft < sizeof(struct dev_match_result)) {
2182 bzero(&cdm->pos, sizeof(cdm->pos));
2183 cdm->pos.position_type =
2184 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
2185
2186 cdm->pos.cookie.bus = bus;
2187 cdm->pos.generations[CAM_BUS_GENERATION]=
2188 bus_generation;
2189 cdm->status = CAM_DEV_MATCH_MORE;
2190 return(0);
2191 }
2192 j = cdm->num_matches;
2193 cdm->num_matches++;
2194 cdm->matches[j].type = DEV_MATCH_BUS;
2195 cdm->matches[j].result.bus_result.path_id = bus->path_id;
2196 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
2197 cdm->matches[j].result.bus_result.unit_number =
2198 bus->sim->unit_number;
2199 strncpy(cdm->matches[j].result.bus_result.dev_name,
2200 bus->sim->sim_name, DEV_IDLEN);
2201 }
2202
2203 /*
2204 * If the user is only interested in busses, there's no
2205 * reason to descend to the next level in the tree.
2206 */
2207 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2208 return(1);
2209
2210 /*
2211 * If there is a target generation recorded, check it to
2212 * make sure the target list hasn't changed.
2213 */
2214 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2215 && (bus == cdm->pos.cookie.bus)
2216 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2217 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
2218 && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
2219 bus->generation)) {
2220 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2221 return(0);
2222 }
2223
2224 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2225 && (cdm->pos.cookie.bus == bus)
2226 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2227 && (cdm->pos.cookie.target != NULL))
2228 return(xpttargettraverse(bus,
2229 (struct cam_et *)cdm->pos.cookie.target,
2230 xptedttargetfunc, arg));
2231 else
2232 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
2233 }
2234
2235 static int
2236 xptedttargetfunc(struct cam_et *target, void *arg)
2237 {
2238 struct ccb_dev_match *cdm;
2239
2240 cdm = (struct ccb_dev_match *)arg;
2241
2242 /*
2243 * If there is a device list generation recorded, check it to
2244 * make sure the device list hasn't changed.
2245 */
2246 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2247 && (cdm->pos.cookie.bus == target->bus)
2248 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2249 && (cdm->pos.cookie.target == target)
2250 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2251 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2252 && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2253 target->generation)) {
2254 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2255 return(0);
2256 }
2257
2258 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2259 && (cdm->pos.cookie.bus == target->bus)
2260 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2261 && (cdm->pos.cookie.target == target)
2262 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2263 && (cdm->pos.cookie.device != NULL))
2264 return(xptdevicetraverse(target,
2265 (struct cam_ed *)cdm->pos.cookie.device,
2266 xptedtdevicefunc, arg));
2267 else
2268 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2269 }
2270
2271 static int
2272 xptedtdevicefunc(struct cam_ed *device, void *arg)
2273 {
2274
2275 struct ccb_dev_match *cdm;
2276 dev_match_ret retval;
2277
2278 cdm = (struct ccb_dev_match *)arg;
2279
2280 /*
2281 * If our position is for something deeper in the tree, that means
2282 * that we've already seen this node. So, we keep going down.
2283 */
2284 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2285 && (cdm->pos.cookie.device == device)
2286 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2287 && (cdm->pos.cookie.periph != NULL))
2288 retval = DM_RET_DESCEND;
2289 else
2290 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2291 device);
2292
2293 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2294 cdm->status = CAM_DEV_MATCH_ERROR;
2295 return(0);
2296 }
2297
2298 /*
2299 * If the copy flag is set, copy this device out.
2300 */
2301 if (retval & DM_RET_COPY) {
2302 int spaceleft, j;
2303
2304 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2305 sizeof(struct dev_match_result));
2306
2307 /*
2308 * If we don't have enough space to put in another
2309 * match result, save our position and tell the
2310 * user there are more devices to check.
2311 */
2312 if (spaceleft < sizeof(struct dev_match_result)) {
2313 bzero(&cdm->pos, sizeof(cdm->pos));
2314 cdm->pos.position_type =
2315 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2316 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2317
2318 cdm->pos.cookie.bus = device->target->bus;
2319 cdm->pos.generations[CAM_BUS_GENERATION]=
2320 bus_generation;
2321 cdm->pos.cookie.target = device->target;
2322 cdm->pos.generations[CAM_TARGET_GENERATION] =
2323 device->target->bus->generation;
2324 cdm->pos.cookie.device = device;
2325 cdm->pos.generations[CAM_DEV_GENERATION] =
2326 device->target->generation;
2327 cdm->status = CAM_DEV_MATCH_MORE;
2328 return(0);
2329 }
2330 j = cdm->num_matches;
2331 cdm->num_matches++;
2332 cdm->matches[j].type = DEV_MATCH_DEVICE;
2333 cdm->matches[j].result.device_result.path_id =
2334 device->target->bus->path_id;
2335 cdm->matches[j].result.device_result.target_id =
2336 device->target->target_id;
2337 cdm->matches[j].result.device_result.target_lun =
2338 device->lun_id;
2339 bcopy(&device->inq_data,
2340 &cdm->matches[j].result.device_result.inq_data,
2341 sizeof(struct scsi_inquiry_data));
2342
2343 /* Let the user know whether this device is unconfigured */
2344 if (device->flags & CAM_DEV_UNCONFIGURED)
2345 cdm->matches[j].result.device_result.flags =
2346 DEV_RESULT_UNCONFIGURED;
2347 else
2348 cdm->matches[j].result.device_result.flags =
2349 DEV_RESULT_NOFLAG;
2350 }
2351
2352 /*
2353 * If the user isn't interested in peripherals, don't descend
2354 * the tree any further.
2355 */
2356 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2357 return(1);
2358
2359 /*
2360 * If there is a peripheral list generation recorded, make sure
2361 * it hasn't changed.
2362 */
2363 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2364 && (device->target->bus == cdm->pos.cookie.bus)
2365 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2366 && (device->target == cdm->pos.cookie.target)
2367 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2368 && (device == cdm->pos.cookie.device)
2369 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2370 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2371 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2372 device->generation)){
2373 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2374 return(0);
2375 }
2376
2377 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2378 && (cdm->pos.cookie.bus == device->target->bus)
2379 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2380 && (cdm->pos.cookie.target == device->target)
2381 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2382 && (cdm->pos.cookie.device == device)
2383 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2384 && (cdm->pos.cookie.periph != NULL))
2385 return(xptperiphtraverse(device,
2386 (struct cam_periph *)cdm->pos.cookie.periph,
2387 xptedtperiphfunc, arg));
2388 else
2389 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2390 }
2391
2392 static int
2393 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2394 {
2395 struct ccb_dev_match *cdm;
2396 dev_match_ret retval;
2397
2398 cdm = (struct ccb_dev_match *)arg;
2399
2400 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2401
2402 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2403 cdm->status = CAM_DEV_MATCH_ERROR;
2404 return(0);
2405 }
2406
2407 /*
2408 * If the copy flag is set, copy this peripheral out.
2409 */
2410 if (retval & DM_RET_COPY) {
2411 int spaceleft, j;
2412
2413 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2414 sizeof(struct dev_match_result));
2415
2416 /*
2417 * If we don't have enough space to put in another
2418 * match result, save our position and tell the
2419 * user there are more devices to check.
2420 */
2421 if (spaceleft < sizeof(struct dev_match_result)) {
2422 bzero(&cdm->pos, sizeof(cdm->pos));
2423 cdm->pos.position_type =
2424 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2425 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2426 CAM_DEV_POS_PERIPH;
2427
2428 cdm->pos.cookie.bus = periph->path->bus;
2429 cdm->pos.generations[CAM_BUS_GENERATION]=
2430 bus_generation;
2431 cdm->pos.cookie.target = periph->path->target;
2432 cdm->pos.generations[CAM_TARGET_GENERATION] =
2433 periph->path->bus->generation;
2434 cdm->pos.cookie.device = periph->path->device;
2435 cdm->pos.generations[CAM_DEV_GENERATION] =
2436 periph->path->target->generation;
2437 cdm->pos.cookie.periph = periph;
2438 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2439 periph->path->device->generation;
2440 cdm->status = CAM_DEV_MATCH_MORE;
2441 return(0);
2442 }
2443
2444 j = cdm->num_matches;
2445 cdm->num_matches++;
2446 cdm->matches[j].type = DEV_MATCH_PERIPH;
2447 cdm->matches[j].result.periph_result.path_id =
2448 periph->path->bus->path_id;
2449 cdm->matches[j].result.periph_result.target_id =
2450 periph->path->target->target_id;
2451 cdm->matches[j].result.periph_result.target_lun =
2452 periph->path->device->lun_id;
2453 cdm->matches[j].result.periph_result.unit_number =
2454 periph->unit_number;
2455 strncpy(cdm->matches[j].result.periph_result.periph_name,
2456 periph->periph_name, DEV_IDLEN);
2457 }
2458
2459 return(1);
2460 }
2461
2462 static int
2463 xptedtmatch(struct ccb_dev_match *cdm)
2464 {
2465 int ret;
2466
2467 cdm->num_matches = 0;
2468
2469 /*
2470 * Check the bus list generation. If it has changed, the user
2471 * needs to reset everything and start over.
2472 */
2473 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2474 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2475 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2476 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2477 return(0);
2478 }
2479
2480 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2481 && (cdm->pos.cookie.bus != NULL))
2482 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2483 xptedtbusfunc, cdm);
2484 else
2485 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2486
2487 /*
2488 * If we get back 0, that means that we had to stop before fully
2489 * traversing the EDT. It also means that one of the subroutines
2490 * has set the status field to the proper value. If we get back 1,
2491 * we've fully traversed the EDT and copied out any matching entries.
2492 */
2493 if (ret == 1)
2494 cdm->status = CAM_DEV_MATCH_LAST;
2495
2496 return(ret);
2497 }
2498
2499 static int
2500 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2501 {
2502 struct ccb_dev_match *cdm;
2503
2504 cdm = (struct ccb_dev_match *)arg;
2505
2506 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2507 && (cdm->pos.cookie.pdrv == pdrv)
2508 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2509 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2510 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2511 (*pdrv)->generation)) {
2512 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2513 return(0);
2514 }
2515
2516 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2517 && (cdm->pos.cookie.pdrv == pdrv)
2518 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2519 && (cdm->pos.cookie.periph != NULL))
2520 return(xptpdperiphtraverse(pdrv,
2521 (struct cam_periph *)cdm->pos.cookie.periph,
2522 xptplistperiphfunc, arg));
2523 else
2524 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2525 }
2526
2527 static int
2528 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2529 {
2530 struct ccb_dev_match *cdm;
2531 dev_match_ret retval;
2532
2533 cdm = (struct ccb_dev_match *)arg;
2534
2535 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2536
2537 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2538 cdm->status = CAM_DEV_MATCH_ERROR;
2539 return(0);
2540 }
2541
2542 /*
2543 * If the copy flag is set, copy this peripheral out.
2544 */
2545 if (retval & DM_RET_COPY) {
2546 int spaceleft, j;
2547
2548 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2549 sizeof(struct dev_match_result));
2550
2551 /*
2552 * If we don't have enough space to put in another
2553 * match result, save our position and tell the
2554 * user there are more devices to check.
2555 */
2556 if (spaceleft < sizeof(struct dev_match_result)) {
2557 struct periph_driver **pdrv;
2558
2559 pdrv = NULL;
2560 bzero(&cdm->pos, sizeof(cdm->pos));
2561 cdm->pos.position_type =
2562 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2563 CAM_DEV_POS_PERIPH;
2564
2565 /*
2566 * This may look a bit non-sensical, but it is
2567 * actually quite logical. There are very few
2568 * peripheral drivers, and bloating every peripheral
2569 * structure with a pointer back to its parent
2570 * peripheral driver linker set entry would cost
2571 * more in the long run than doing this quick lookup.
2572 */
2573 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2574 if (strcmp((*pdrv)->driver_name,
2575 periph->periph_name) == 0)
2576 break;
2577 }
2578
2579 if (*pdrv == NULL) {
2580 cdm->status = CAM_DEV_MATCH_ERROR;
2581 return(0);
2582 }
2583
2584 cdm->pos.cookie.pdrv = pdrv;
2585 /*
2586 * The periph generation slot does double duty, as
2587 * does the periph pointer slot. They are used for
2588 * both edt and pdrv lookups and positioning.
2589 */
2590 cdm->pos.cookie.periph = periph;
2591 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2592 (*pdrv)->generation;
2593 cdm->status = CAM_DEV_MATCH_MORE;
2594 return(0);
2595 }
2596
2597 j = cdm->num_matches;
2598 cdm->num_matches++;
2599 cdm->matches[j].type = DEV_MATCH_PERIPH;
2600 cdm->matches[j].result.periph_result.path_id =
2601 periph->path->bus->path_id;
2602
2603 /*
2604 * The transport layer peripheral doesn't have a target or
2605 * lun.
2606 */
2607 if (periph->path->target)
2608 cdm->matches[j].result.periph_result.target_id =
2609 periph->path->target->target_id;
2610 else
2611 cdm->matches[j].result.periph_result.target_id = -1;
2612
2613 if (periph->path->device)
2614 cdm->matches[j].result.periph_result.target_lun =
2615 periph->path->device->lun_id;
2616 else
2617 cdm->matches[j].result.periph_result.target_lun = -1;
2618
2619 cdm->matches[j].result.periph_result.unit_number =
2620 periph->unit_number;
2621 strncpy(cdm->matches[j].result.periph_result.periph_name,
2622 periph->periph_name, DEV_IDLEN);
2623 }
2624
2625 return(1);
2626 }
2627
2628 static int
2629 xptperiphlistmatch(struct ccb_dev_match *cdm)
2630 {
2631 int ret;
2632
2633 cdm->num_matches = 0;
2634
2635 /*
2636 * At this point in the edt traversal function, we check the bus
2637 * list generation to make sure that no busses have been added or
2638 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2639 * For the peripheral driver list traversal function, however, we
2640 * don't have to worry about new peripheral driver types coming or
2641 * going; they're in a linker set, and therefore can't change
2642 * without a recompile.
2643 */
2644
2645 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2646 && (cdm->pos.cookie.pdrv != NULL))
2647 ret = xptpdrvtraverse(
2648 (struct periph_driver **)cdm->pos.cookie.pdrv,
2649 xptplistpdrvfunc, cdm);
2650 else
2651 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2652
2653 /*
2654 * If we get back 0, that means that we had to stop before fully
2655 * traversing the peripheral driver tree. It also means that one of
2656 * the subroutines has set the status field to the proper value. If
2657 * we get back 1, we've fully traversed the EDT and copied out any
2658 * matching entries.
2659 */
2660 if (ret == 1)
2661 cdm->status = CAM_DEV_MATCH_LAST;
2662
2663 return(ret);
2664 }
2665
2666 static int
2667 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2668 {
2669 struct cam_eb *bus, *next_bus;
2670 int retval;
2671
2672 retval = 1;
2673
2674 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2675 bus != NULL;
2676 bus = next_bus) {
2677 next_bus = TAILQ_NEXT(bus, links);
2678
2679 retval = tr_func(bus, arg);
2680 if (retval == 0)
2681 return(retval);
2682 }
2683
2684 return(retval);
2685 }
2686
2687 static int
2688 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2689 xpt_targetfunc_t *tr_func, void *arg)
2690 {
2691 struct cam_et *target, *next_target;
2692 int retval;
2693
2694 retval = 1;
2695 for (target = (start_target ? start_target :
2696 TAILQ_FIRST(&bus->et_entries));
2697 target != NULL; target = next_target) {
2698
2699 next_target = TAILQ_NEXT(target, links);
2700
2701 retval = tr_func(target, arg);
2702
2703 if (retval == 0)
2704 return(retval);
2705 }
2706
2707 return(retval);
2708 }
2709
2710 static int
2711 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2712 xpt_devicefunc_t *tr_func, void *arg)
2713 {
2714 struct cam_ed *device, *next_device;
2715 int retval;
2716
2717 retval = 1;
2718 for (device = (start_device ? start_device :
2719 TAILQ_FIRST(&target->ed_entries));
2720 device != NULL;
2721 device = next_device) {
2722
2723 next_device = TAILQ_NEXT(device, links);
2724
2725 retval = tr_func(device, arg);
2726
2727 if (retval == 0)
2728 return(retval);
2729 }
2730
2731 return(retval);
2732 }
2733
2734 static int
2735 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2736 xpt_periphfunc_t *tr_func, void *arg)
2737 {
2738 struct cam_periph *periph, *next_periph;
2739 int retval;
2740
2741 retval = 1;
2742
2743 for (periph = (start_periph ? start_periph :
2744 SLIST_FIRST(&device->periphs));
2745 periph != NULL;
2746 periph = next_periph) {
2747
2748 next_periph = SLIST_NEXT(periph, periph_links);
2749
2750 retval = tr_func(periph, arg);
2751 if (retval == 0)
2752 return(retval);
2753 }
2754
2755 return(retval);
2756 }
2757
2758 static int
2759 xptpdrvtraverse(struct periph_driver **start_pdrv,
2760 xpt_pdrvfunc_t *tr_func, void *arg)
2761 {
2762 struct periph_driver **pdrv;
2763 int retval;
2764
2765 retval = 1;
2766
2767 /*
2768 * We don't traverse the peripheral driver list like we do the
2769 * other lists, because it is a linker set, and therefore cannot be
2770 * changed during runtime. If the peripheral driver list is ever
2771 * re-done to be something other than a linker set (i.e. it can
2772 * change while the system is running), the list traversal should
2773 * be modified to work like the other traversal functions.
2774 */
2775 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2776 *pdrv != NULL; pdrv++) {
2777 retval = tr_func(pdrv, arg);
2778
2779 if (retval == 0)
2780 return(retval);
2781 }
2782
2783 return(retval);
2784 }
2785
2786 static int
2787 xptpdperiphtraverse(struct periph_driver **pdrv,
2788 struct cam_periph *start_periph,
2789 xpt_periphfunc_t *tr_func, void *arg)
2790 {
2791 struct cam_periph *periph, *next_periph;
2792 int retval;
2793
2794 retval = 1;
2795
2796 for (periph = (start_periph ? start_periph :
2797 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2798 periph = next_periph) {
2799
2800 next_periph = TAILQ_NEXT(periph, unit_links);
2801
2802 retval = tr_func(periph, arg);
2803 if (retval == 0)
2804 return(retval);
2805 }
2806 return(retval);
2807 }
2808
2809 static int
2810 xptdefbusfunc(struct cam_eb *bus, void *arg)
2811 {
2812 struct xpt_traverse_config *tr_config;
2813
2814 tr_config = (struct xpt_traverse_config *)arg;
2815
2816 if (tr_config->depth == XPT_DEPTH_BUS) {
2817 xpt_busfunc_t *tr_func;
2818
2819 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2820
2821 return(tr_func(bus, tr_config->tr_arg));
2822 } else
2823 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2824 }
2825
2826 static int
2827 xptdeftargetfunc(struct cam_et *target, void *arg)
2828 {
2829 struct xpt_traverse_config *tr_config;
2830
2831 tr_config = (struct xpt_traverse_config *)arg;
2832
2833 if (tr_config->depth == XPT_DEPTH_TARGET) {
2834 xpt_targetfunc_t *tr_func;
2835
2836 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2837
2838 return(tr_func(target, tr_config->tr_arg));
2839 } else
2840 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2841 }
2842
2843 static int
2844 xptdefdevicefunc(struct cam_ed *device, void *arg)
2845 {
2846 struct xpt_traverse_config *tr_config;
2847
2848 tr_config = (struct xpt_traverse_config *)arg;
2849
2850 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2851 xpt_devicefunc_t *tr_func;
2852
2853 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2854
2855 return(tr_func(device, tr_config->tr_arg));
2856 } else
2857 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2858 }
2859
2860 static int
2861 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2862 {
2863 struct xpt_traverse_config *tr_config;
2864 xpt_periphfunc_t *tr_func;
2865
2866 tr_config = (struct xpt_traverse_config *)arg;
2867
2868 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2869
2870 /*
2871 * Unlike the other default functions, we don't check for depth
2872 * here. The peripheral driver level is the last level in the EDT,
2873 * so if we're here, we should execute the function in question.
2874 */
2875 return(tr_func(periph, tr_config->tr_arg));
2876 }
2877
2878 /*
2879 * Execute the given function for every bus in the EDT.
2880 */
2881 static int
2882 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2883 {
2884 struct xpt_traverse_config tr_config;
2885
2886 tr_config.depth = XPT_DEPTH_BUS;
2887 tr_config.tr_func = tr_func;
2888 tr_config.tr_arg = arg;
2889
2890 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2891 }
2892
2893 #ifdef notusedyet
2894 /*
2895 * Execute the given function for every target in the EDT.
2896 */
2897 static int
2898 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2899 {
2900 struct xpt_traverse_config tr_config;
2901
2902 tr_config.depth = XPT_DEPTH_TARGET;
2903 tr_config.tr_func = tr_func;
2904 tr_config.tr_arg = arg;
2905
2906 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2907 }
2908 #endif /* notusedyet */
2909
2910 /*
2911 * Execute the given function for every device in the EDT.
2912 */
2913 static int
2914 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2915 {
2916 struct xpt_traverse_config tr_config;
2917
2918 tr_config.depth = XPT_DEPTH_DEVICE;
2919 tr_config.tr_func = tr_func;
2920 tr_config.tr_arg = arg;
2921
2922 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2923 }
2924
2925 #ifdef notusedyet
2926 /*
2927 * Execute the given function for every peripheral in the EDT.
2928 */
2929 static int
2930 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2931 {
2932 struct xpt_traverse_config tr_config;
2933
2934 tr_config.depth = XPT_DEPTH_PERIPH;
2935 tr_config.tr_func = tr_func;
2936 tr_config.tr_arg = arg;
2937
2938 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2939 }
2940 #endif /* notusedyet */
2941
2942 static int
2943 xptsetasyncfunc(struct cam_ed *device, void *arg)
2944 {
2945 struct cam_path path;
2946 struct ccb_getdev cgd;
2947 struct async_node *cur_entry;
2948
2949 cur_entry = (struct async_node *)arg;
2950
2951 /*
2952 * Don't report unconfigured devices (Wildcard devs,
2953 * devices only for target mode, device instances
2954 * that have been invalidated but are waiting for
2955 * their last reference count to be released).
2956 */
2957 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2958 return (1);
2959
2960 xpt_compile_path(&path,
2961 NULL,
2962 device->target->bus->path_id,
2963 device->target->target_id,
2964 device->lun_id);
2965 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2966 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2967 xpt_action((union ccb *)&cgd);
2968 cur_entry->callback(cur_entry->callback_arg,
2969 AC_FOUND_DEVICE,
2970 &path, &cgd);
2971 xpt_release_path(&path);
2972
2973 return(1);
2974 }
2975
2976 static int
2977 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2978 {
2979 struct cam_path path;
2980 struct ccb_pathinq cpi;
2981 struct async_node *cur_entry;
2982
2983 cur_entry = (struct async_node *)arg;
2984
2985 xpt_compile_path(&path, /*periph*/NULL,
2986 bus->sim->path_id,
2987 CAM_TARGET_WILDCARD,
2988 CAM_LUN_WILDCARD);
2989 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2990 cpi.ccb_h.func_code = XPT_PATH_INQ;
2991 xpt_action((union ccb *)&cpi);
2992 cur_entry->callback(cur_entry->callback_arg,
2993 AC_PATH_REGISTERED,
2994 &path, &cpi);
2995 xpt_release_path(&path);
2996
2997 return(1);
2998 }
2999
3000 void
3001 xpt_action(union ccb *start_ccb)
3002 {
3003 int iopl;
3004
3005 GIANT_REQUIRED;
3006
3007 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
3008
3009 start_ccb->ccb_h.status = CAM_REQ_INPROG;
3010
3011 iopl = splsoftcam();
3012 switch (start_ccb->ccb_h.func_code) {
3013 case XPT_SCSI_IO:
3014 {
3015 #ifdef CAM_NEW_TRAN_CODE
3016 struct cam_ed *device;
3017 #endif /* CAM_NEW_TRAN_CODE */
3018 #ifdef CAMDEBUG
3019 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3020 struct cam_path *path;
3021
3022 path = start_ccb->ccb_h.path;
3023 #endif
3024
3025 /*
3026 * For the sake of compatibility with SCSI-1
3027 * devices that may not understand the identify
3028 * message, we include lun information in the
3029 * second byte of all commands. SCSI-1 specifies
3030 * that luns are a 3 bit value and reserves only 3
3031 * bits for lun information in the CDB. Later
3032 * revisions of the SCSI spec allow for more than 8
3033 * luns, but have deprecated lun information in the
3034 * CDB. So, if the lun won't fit, we must omit.
3035 *
3036 * Also be aware that during initial probing for devices,
3037 * the inquiry information is unknown but initialized to 0.
3038 * This means that this code will be exercised while probing
3039 * devices with an ANSI revision greater than 2.
3040 */
3041 #ifdef CAM_NEW_TRAN_CODE
3042 device = start_ccb->ccb_h.path->device;
3043 if (device->protocol_version <= SCSI_REV_2
3044 #else /* CAM_NEW_TRAN_CODE */
3045 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2
3046 #endif /* CAM_NEW_TRAN_CODE */
3047 && start_ccb->ccb_h.target_lun < 8
3048 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
3049
3050 start_ccb->csio.cdb_io.cdb_bytes[1] |=
3051 start_ccb->ccb_h.target_lun << 5;
3052 }
3053 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
3054 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
3055 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
3056 &path->device->inq_data),
3057 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
3058 cdb_str, sizeof(cdb_str))));
3059 }
3060 /* FALLTHROUGH */
3061 case XPT_TARGET_IO:
3062 case XPT_CONT_TARGET_IO:
3063 start_ccb->csio.sense_resid = 0;
3064 start_ccb->csio.resid = 0;
3065 /* FALLTHROUGH */
3066 case XPT_RESET_DEV:
3067 case XPT_ENG_EXEC:
3068 {
3069 struct cam_path *path;
3070 struct cam_sim *sim;
3071 int s;
3072 int runq;
3073
3074 path = start_ccb->ccb_h.path;
3075 s = splsoftcam();
3076
3077 sim = path->bus->sim;
3078 if (SIM_DEAD(sim)) {
3079 /* The SIM has gone; just execute the CCB directly. */
3080 cam_ccbq_send_ccb(&path->device->ccbq, start_ccb);
3081 (*(sim->sim_action))(sim, start_ccb);
3082 splx(s);
3083 break;
3084 }
3085
3086 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
3087 if (path->device->qfrozen_cnt == 0)
3088 runq = xpt_schedule_dev_sendq(path->bus, path->device);
3089 else
3090 runq = 0;
3091 splx(s);
3092 if (runq != 0)
3093 xpt_run_dev_sendq(path->bus);
3094 break;
3095 }
3096 case XPT_SET_TRAN_SETTINGS:
3097 {
3098 xpt_set_transfer_settings(&start_ccb->cts,
3099 start_ccb->ccb_h.path->device,
3100 /*async_update*/FALSE);
3101 break;
3102 }
3103 case XPT_CALC_GEOMETRY:
3104 {
3105 struct cam_sim *sim;
3106
3107 /* Filter out garbage */
3108 if (start_ccb->ccg.block_size == 0
3109 || start_ccb->ccg.volume_size == 0) {
3110 start_ccb->ccg.cylinders = 0;
3111 start_ccb->ccg.heads = 0;
3112 start_ccb->ccg.secs_per_track = 0;
3113 start_ccb->ccb_h.status = CAM_REQ_CMP;
3114 break;
3115 }
3116 #ifdef PC98
3117 /*
3118 * In a PC-98 system, geometry translation depens on
3119 * the "real" device geometry obtained from mode page 4.
3120 * SCSI geometry translation is performed in the
3121 * initialization routine of the SCSI BIOS and the result
3122 * stored in host memory. If the translation is available
3123 * in host memory, use it. If not, rely on the default
3124 * translation the device driver performs.
3125 */
3126 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
3127 start_ccb->ccb_h.status = CAM_REQ_CMP;
3128 break;
3129 }
3130 #endif
3131 sim = start_ccb->ccb_h.path->bus->sim;
3132 (*(sim->sim_action))(sim, start_ccb);
3133 break;
3134 }
3135 case XPT_ABORT:
3136 {
3137 union ccb* abort_ccb;
3138 int s;
3139
3140 abort_ccb = start_ccb->cab.abort_ccb;
3141 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
3142
3143 if (abort_ccb->ccb_h.pinfo.index >= 0) {
3144 struct cam_ccbq *ccbq;
3145
3146 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
3147 cam_ccbq_remove_ccb(ccbq, abort_ccb);
3148 abort_ccb->ccb_h.status =
3149 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3150 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3151 s = splcam();
3152 xpt_done(abort_ccb);
3153 splx(s);
3154 start_ccb->ccb_h.status = CAM_REQ_CMP;
3155 break;
3156 }
3157 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
3158 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
3159 /*
3160 * We've caught this ccb en route to
3161 * the SIM. Flag it for abort and the
3162 * SIM will do so just before starting
3163 * real work on the CCB.
3164 */
3165 abort_ccb->ccb_h.status =
3166 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3167 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3168 start_ccb->ccb_h.status = CAM_REQ_CMP;
3169 break;
3170 }
3171 }
3172 if (XPT_FC_IS_QUEUED(abort_ccb)
3173 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
3174 /*
3175 * It's already completed but waiting
3176 * for our SWI to get to it.
3177 */
3178 start_ccb->ccb_h.status = CAM_UA_ABORT;
3179 break;
3180 }
3181 /*
3182 * If we weren't able to take care of the abort request
3183 * in the XPT, pass the request down to the SIM for processing.
3184 */
3185 }
3186 /* FALLTHROUGH */
3187 case XPT_ACCEPT_TARGET_IO:
3188 case XPT_EN_LUN:
3189 case XPT_IMMED_NOTIFY:
3190 case XPT_NOTIFY_ACK:
3191 case XPT_GET_TRAN_SETTINGS:
3192 case XPT_RESET_BUS:
3193 {
3194 struct cam_sim *sim;
3195
3196 sim = start_ccb->ccb_h.path->bus->sim;
3197 (*(sim->sim_action))(sim, start_ccb);
3198 break;
3199 }
3200 case XPT_PATH_INQ:
3201 {
3202 struct cam_sim *sim;
3203
3204 sim = start_ccb->ccb_h.path->bus->sim;
3205 (*(sim->sim_action))(sim, start_ccb);
3206 break;
3207 }
3208 case XPT_PATH_STATS:
3209 start_ccb->cpis.last_reset =
3210 start_ccb->ccb_h.path->bus->last_reset;
3211 start_ccb->ccb_h.status = CAM_REQ_CMP;
3212 break;
3213 case XPT_GDEV_TYPE:
3214 {
3215 struct cam_ed *dev;
3216 int s;
3217
3218 dev = start_ccb->ccb_h.path->device;
3219 s = splcam();
3220 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3221 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3222 } else {
3223 struct ccb_getdev *cgd;
3224 struct cam_eb *bus;
3225 struct cam_et *tar;
3226
3227 cgd = &start_ccb->cgd;
3228 bus = cgd->ccb_h.path->bus;
3229 tar = cgd->ccb_h.path->target;
3230 cgd->inq_data = dev->inq_data;
3231 cgd->ccb_h.status = CAM_REQ_CMP;
3232 cgd->serial_num_len = dev->serial_num_len;
3233 if ((dev->serial_num_len > 0)
3234 && (dev->serial_num != NULL))
3235 bcopy(dev->serial_num, cgd->serial_num,
3236 dev->serial_num_len);
3237 }
3238 splx(s);
3239 break;
3240 }
3241 case XPT_GDEV_STATS:
3242 {
3243 struct cam_ed *dev;
3244 int s;
3245
3246 dev = start_ccb->ccb_h.path->device;
3247 s = splcam();
3248 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3249 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3250 } else {
3251 struct ccb_getdevstats *cgds;
3252 struct cam_eb *bus;
3253 struct cam_et *tar;
3254
3255 cgds = &start_ccb->cgds;
3256 bus = cgds->ccb_h.path->bus;
3257 tar = cgds->ccb_h.path->target;
3258 cgds->dev_openings = dev->ccbq.dev_openings;
3259 cgds->dev_active = dev->ccbq.dev_active;
3260 cgds->devq_openings = dev->ccbq.devq_openings;
3261 cgds->devq_queued = dev->ccbq.queue.entries;
3262 cgds->held = dev->ccbq.held;
3263 cgds->last_reset = tar->last_reset;
3264 cgds->maxtags = dev->quirk->maxtags;
3265 cgds->mintags = dev->quirk->mintags;
3266 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3267 cgds->last_reset = bus->last_reset;
3268 cgds->ccb_h.status = CAM_REQ_CMP;
3269 }
3270 splx(s);
3271 break;
3272 }
3273 case XPT_GDEVLIST:
3274 {
3275 struct cam_periph *nperiph;
3276 struct periph_list *periph_head;
3277 struct ccb_getdevlist *cgdl;
3278 u_int i;
3279 int s;
3280 struct cam_ed *device;
3281 int found;
3282
3283
3284 found = 0;
3285
3286 /*
3287 * Don't want anyone mucking with our data.
3288 */
3289 s = splcam();
3290 device = start_ccb->ccb_h.path->device;
3291 periph_head = &device->periphs;
3292 cgdl = &start_ccb->cgdl;
3293
3294 /*
3295 * Check and see if the list has changed since the user
3296 * last requested a list member. If so, tell them that the
3297 * list has changed, and therefore they need to start over
3298 * from the beginning.
3299 */
3300 if ((cgdl->index != 0) &&
3301 (cgdl->generation != device->generation)) {
3302 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3303 splx(s);
3304 break;
3305 }
3306
3307 /*
3308 * Traverse the list of peripherals and attempt to find
3309 * the requested peripheral.
3310 */
3311 for (nperiph = SLIST_FIRST(periph_head), i = 0;
3312 (nperiph != NULL) && (i <= cgdl->index);
3313 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
3314 if (i == cgdl->index) {
3315 strncpy(cgdl->periph_name,
3316 nperiph->periph_name,
3317 DEV_IDLEN);
3318 cgdl->unit_number = nperiph->unit_number;
3319 found = 1;
3320 }
3321 }
3322 if (found == 0) {
3323 cgdl->status = CAM_GDEVLIST_ERROR;
3324 splx(s);
3325 break;
3326 }
3327
3328 if (nperiph == NULL)
3329 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3330 else
3331 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3332
3333 cgdl->index++;
3334 cgdl->generation = device->generation;
3335
3336 splx(s);
3337 cgdl->ccb_h.status = CAM_REQ_CMP;
3338 break;
3339 }
3340 case XPT_DEV_MATCH:
3341 {
3342 int s;
3343 dev_pos_type position_type;
3344 struct ccb_dev_match *cdm;
3345
3346 cdm = &start_ccb->cdm;
3347
3348 /*
3349 * Prevent EDT changes while we traverse it.
3350 */
3351 s = splcam();
3352 /*
3353 * There are two ways of getting at information in the EDT.
3354 * The first way is via the primary EDT tree. It starts
3355 * with a list of busses, then a list of targets on a bus,
3356 * then devices/luns on a target, and then peripherals on a
3357 * device/lun. The "other" way is by the peripheral driver
3358 * lists. The peripheral driver lists are organized by
3359 * peripheral driver. (obviously) So it makes sense to
3360 * use the peripheral driver list if the user is looking
3361 * for something like "da1", or all "da" devices. If the
3362 * user is looking for something on a particular bus/target
3363 * or lun, it's generally better to go through the EDT tree.
3364 */
3365
3366 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3367 position_type = cdm->pos.position_type;
3368 else {
3369 u_int i;
3370
3371 position_type = CAM_DEV_POS_NONE;
3372
3373 for (i = 0; i < cdm->num_patterns; i++) {
3374 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3375 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3376 position_type = CAM_DEV_POS_EDT;
3377 break;
3378 }
3379 }
3380
3381 if (cdm->num_patterns == 0)
3382 position_type = CAM_DEV_POS_EDT;
3383 else if (position_type == CAM_DEV_POS_NONE)
3384 position_type = CAM_DEV_POS_PDRV;
3385 }
3386
3387 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3388 case CAM_DEV_POS_EDT:
3389 xptedtmatch(cdm);
3390 break;
3391 case CAM_DEV_POS_PDRV:
3392 xptperiphlistmatch(cdm);
3393 break;
3394 default:
3395 cdm->status = CAM_DEV_MATCH_ERROR;
3396 break;
3397 }
3398
3399 splx(s);
3400
3401 if (cdm->status == CAM_DEV_MATCH_ERROR)
3402 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3403 else
3404 start_ccb->ccb_h.status = CAM_REQ_CMP;
3405
3406 break;
3407 }
3408 case XPT_SASYNC_CB:
3409 {
3410 struct ccb_setasync *csa;
3411 struct async_node *cur_entry;
3412 struct async_list *async_head;
3413 u_int32_t added;
3414 int s;
3415
3416 csa = &start_ccb->csa;
3417 added = csa->event_enable;
3418 async_head = &csa->ccb_h.path->device->asyncs;
3419
3420 /*
3421 * If there is already an entry for us, simply
3422 * update it.
3423 */
3424 s = splcam();
3425 cur_entry = SLIST_FIRST(async_head);
3426 while (cur_entry != NULL) {
3427 if ((cur_entry->callback_arg == csa->callback_arg)
3428 && (cur_entry->callback == csa->callback))
3429 break;
3430 cur_entry = SLIST_NEXT(cur_entry, links);
3431 }
3432
3433 if (cur_entry != NULL) {
3434 /*
3435 * If the request has no flags set,
3436 * remove the entry.
3437 */
3438 added &= ~cur_entry->event_enable;
3439 if (csa->event_enable == 0) {
3440 SLIST_REMOVE(async_head, cur_entry,
3441 async_node, links);
3442 csa->ccb_h.path->device->refcount--;
3443 free(cur_entry, M_CAMXPT);
3444 } else {
3445 cur_entry->event_enable = csa->event_enable;
3446 }
3447 } else {
3448 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3449 M_NOWAIT);
3450 if (cur_entry == NULL) {
3451 splx(s);
3452 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3453 break;
3454 }
3455 cur_entry->event_enable = csa->event_enable;
3456 cur_entry->callback_arg = csa->callback_arg;
3457 cur_entry->callback = csa->callback;
3458 SLIST_INSERT_HEAD(async_head, cur_entry, links);
3459 csa->ccb_h.path->device->refcount++;
3460 }
3461
3462 if ((added & AC_FOUND_DEVICE) != 0) {
3463 /*
3464 * Get this peripheral up to date with all
3465 * the currently existing devices.
3466 */
3467 xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3468 }
3469 if ((added & AC_PATH_REGISTERED) != 0) {
3470 /*
3471 * Get this peripheral up to date with all
3472 * the currently existing busses.
3473 */
3474 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3475 }
3476 splx(s);
3477 start_ccb->ccb_h.status = CAM_REQ_CMP;
3478 break;
3479 }
3480 case XPT_REL_SIMQ:
3481 {
3482 struct ccb_relsim *crs;
3483 struct cam_ed *dev;
3484 int s;
3485
3486 crs = &start_ccb->crs;
3487 dev = crs->ccb_h.path->device;
3488 if (dev == NULL) {
3489
3490 crs->ccb_h.status = CAM_DEV_NOT_THERE;
3491 break;
3492 }
3493
3494 s = splcam();
3495
3496 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3497
3498 if ((dev->inq_data.flags & SID_CmdQue) != 0) {
3499
3500 /* Don't ever go below one opening */
3501 if (crs->openings > 0) {
3502 xpt_dev_ccbq_resize(crs->ccb_h.path,
3503 crs->openings);
3504
3505 if (bootverbose) {
3506 xpt_print_path(crs->ccb_h.path);
3507 printf("tagged openings "
3508 "now %d\n",
3509 crs->openings);
3510 }
3511 }
3512 }
3513 }
3514
3515 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3516
3517 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3518
3519 /*
3520 * Just extend the old timeout and decrement
3521 * the freeze count so that a single timeout
3522 * is sufficient for releasing the queue.
3523 */
3524 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3525 untimeout(xpt_release_devq_timeout,
3526 dev, dev->c_handle);
3527 } else {
3528
3529 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3530 }
3531
3532 dev->c_handle =
3533 timeout(xpt_release_devq_timeout,
3534 dev,
3535 (crs->release_timeout * hz) / 1000);
3536
3537 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3538
3539 }
3540
3541 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3542
3543 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3544 /*
3545 * Decrement the freeze count so that a single
3546 * completion is still sufficient to unfreeze
3547 * the queue.
3548 */
3549 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3550 } else {
3551
3552 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3553 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3554 }
3555 }
3556
3557 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3558
3559 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3560 || (dev->ccbq.dev_active == 0)) {
3561
3562 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3563 } else {
3564
3565 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3566 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3567 }
3568 }
3569 splx(s);
3570
3571 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3572
3573 xpt_release_devq(crs->ccb_h.path, /*count*/1,
3574 /*run_queue*/TRUE);
3575 }
3576 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3577 start_ccb->ccb_h.status = CAM_REQ_CMP;
3578 break;
3579 }
3580 case XPT_SCAN_BUS:
3581 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3582 break;
3583 case XPT_SCAN_LUN:
3584 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3585 start_ccb->ccb_h.path, start_ccb->crcn.flags,
3586 start_ccb);
3587 break;
3588 case XPT_DEBUG: {
3589 #ifdef CAMDEBUG
3590 int s;
3591
3592 s = splcam();
3593 #ifdef CAM_DEBUG_DELAY
3594 cam_debug_delay = CAM_DEBUG_DELAY;
3595 #endif
3596 cam_dflags = start_ccb->cdbg.flags;
3597 if (cam_dpath != NULL) {
3598 xpt_free_path(cam_dpath);
3599 cam_dpath = NULL;
3600 }
3601
3602 if (cam_dflags != CAM_DEBUG_NONE) {
3603 if (xpt_create_path(&cam_dpath, xpt_periph,
3604 start_ccb->ccb_h.path_id,
3605 start_ccb->ccb_h.target_id,
3606 start_ccb->ccb_h.target_lun) !=
3607 CAM_REQ_CMP) {
3608 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3609 cam_dflags = CAM_DEBUG_NONE;
3610 } else {
3611 start_ccb->ccb_h.status = CAM_REQ_CMP;
3612 xpt_print_path(cam_dpath);
3613 printf("debugging flags now %x\n", cam_dflags);
3614 }
3615 } else {
3616 cam_dpath = NULL;
3617 start_ccb->ccb_h.status = CAM_REQ_CMP;
3618 }
3619 splx(s);
3620 #else /* !CAMDEBUG */
3621 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3622 #endif /* CAMDEBUG */
3623 break;
3624 }
3625 case XPT_NOOP:
3626 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3627 xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3628 start_ccb->ccb_h.status = CAM_REQ_CMP;
3629 break;
3630 default:
3631 case XPT_SDEV_TYPE:
3632 case XPT_TERM_IO:
3633 case XPT_ENG_INQ:
3634 /* XXX Implement */
3635 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3636 break;
3637 }
3638 splx(iopl);
3639 }
3640
3641 void
3642 xpt_polled_action(union ccb *start_ccb)
3643 {
3644 int s;
3645 u_int32_t timeout;
3646 struct cam_sim *sim;
3647 struct cam_devq *devq;
3648 struct cam_ed *dev;
3649
3650 GIANT_REQUIRED;
3651
3652 timeout = start_ccb->ccb_h.timeout;
3653 sim = start_ccb->ccb_h.path->bus->sim;
3654 devq = sim->devq;
3655 dev = start_ccb->ccb_h.path->device;
3656
3657 s = splcam();
3658
3659 /*
3660 * Steal an opening so that no other queued requests
3661 * can get it before us while we simulate interrupts.
3662 */
3663 dev->ccbq.devq_openings--;
3664 dev->ccbq.dev_openings--;
3665
3666 while(((devq != NULL && devq->send_openings <= 0) ||
3667 dev->ccbq.dev_openings < 0) && (--timeout > 0)) {
3668 DELAY(1000);
3669 (*(sim->sim_poll))(sim);
3670 camisr(&cam_bioq);
3671 }
3672
3673 dev->ccbq.devq_openings++;
3674 dev->ccbq.dev_openings++;
3675
3676 if (timeout != 0) {
3677 xpt_action(start_ccb);
3678 while(--timeout > 0) {
3679 (*(sim->sim_poll))(sim);
3680 camisr(&cam_bioq);
3681 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3682 != CAM_REQ_INPROG)
3683 break;
3684 DELAY(1000);
3685 }
3686 if (timeout == 0) {
3687 /*
3688 * XXX Is it worth adding a sim_timeout entry
3689 * point so we can attempt recovery? If
3690 * this is only used for dumps, I don't think
3691 * it is.
3692 */
3693 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3694 }
3695 } else {
3696 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3697 }
3698 splx(s);
3699 }
3700
3701 /*
3702 * Schedule a peripheral driver to receive a ccb when it's
3703 * target device has space for more transactions.
3704 */
3705 void
3706 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3707 {
3708 struct cam_ed *device;
3709 union ccb *work_ccb;
3710 int s;
3711 int runq;
3712
3713 GIANT_REQUIRED;
3714
3715 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3716 device = perph->path->device;
3717 s = splsoftcam();
3718 if (periph_is_queued(perph)) {
3719 /* Simply reorder based on new priority */
3720 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3721 (" change priority to %d\n", new_priority));
3722 if (new_priority < perph->pinfo.priority) {
3723 camq_change_priority(&device->drvq,
3724 perph->pinfo.index,
3725 new_priority);
3726 }
3727 runq = 0;
3728 } else if (SIM_DEAD(perph->path->bus->sim)) {
3729 /* The SIM is gone so just call periph_start directly. */
3730 work_ccb = xpt_get_ccb(perph->path->device);
3731 splx(s);
3732 if (work_ccb == NULL)
3733 return; /* XXX */
3734 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority);
3735 perph->pinfo.priority = new_priority;
3736 perph->periph_start(perph, work_ccb);
3737 return;
3738 } else {
3739 /* New entry on the queue */
3740 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3741 (" added periph to queue\n"));
3742 perph->pinfo.priority = new_priority;
3743 perph->pinfo.generation = ++device->drvq.generation;
3744 camq_insert(&device->drvq, &perph->pinfo);
3745 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3746 }
3747 splx(s);
3748 if (runq != 0) {
3749 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3750 (" calling xpt_run_devq\n"));
3751 xpt_run_dev_allocq(perph->path->bus);
3752 }
3753 }
3754
3755
3756 /*
3757 * Schedule a device to run on a given queue.
3758 * If the device was inserted as a new entry on the queue,
3759 * return 1 meaning the device queue should be run. If we
3760 * were already queued, implying someone else has already
3761 * started the queue, return 0 so the caller doesn't attempt
3762 * to run the queue. Must be run at either splsoftcam
3763 * (or splcam since that encompases splsoftcam).
3764 */
3765 static int
3766 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3767 u_int32_t new_priority)
3768 {
3769 int retval;
3770 u_int32_t old_priority;
3771
3772 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3773
3774 old_priority = pinfo->priority;
3775
3776 /*
3777 * Are we already queued?
3778 */
3779 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3780 /* Simply reorder based on new priority */
3781 if (new_priority < old_priority) {
3782 camq_change_priority(queue, pinfo->index,
3783 new_priority);
3784 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3785 ("changed priority to %d\n",
3786 new_priority));
3787 }
3788 retval = 0;
3789 } else {
3790 /* New entry on the queue */
3791 if (new_priority < old_priority)
3792 pinfo->priority = new_priority;
3793
3794 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3795 ("Inserting onto queue\n"));
3796 pinfo->generation = ++queue->generation;
3797 camq_insert(queue, pinfo);
3798 retval = 1;
3799 }
3800 return (retval);
3801 }
3802
3803 static void
3804 xpt_run_dev_allocq(struct cam_eb *bus)
3805 {
3806 struct cam_devq *devq;
3807 int s;
3808
3809 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3810 devq = bus->sim->devq;
3811
3812 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3813 (" qfrozen_cnt == 0x%x, entries == %d, "
3814 "openings == %d, active == %d\n",
3815 devq->alloc_queue.qfrozen_cnt,
3816 devq->alloc_queue.entries,
3817 devq->alloc_openings,
3818 devq->alloc_active));
3819
3820 s = splsoftcam();
3821 devq->alloc_queue.qfrozen_cnt++;
3822 while ((devq->alloc_queue.entries > 0)
3823 && (devq->alloc_openings > 0)
3824 && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3825 struct cam_ed_qinfo *qinfo;
3826 struct cam_ed *device;
3827 union ccb *work_ccb;
3828 struct cam_periph *drv;
3829 struct camq *drvq;
3830
3831 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3832 CAMQ_HEAD);
3833 device = qinfo->device;
3834
3835 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3836 ("running device %p\n", device));
3837
3838 drvq = &device->drvq;
3839
3840 #ifdef CAMDEBUG
3841 if (drvq->entries <= 0) {
3842 panic("xpt_run_dev_allocq: "
3843 "Device on queue without any work to do");
3844 }
3845 #endif
3846 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3847 devq->alloc_openings--;
3848 devq->alloc_active++;
3849 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3850 splx(s);
3851 xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3852 drv->pinfo.priority);
3853 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3854 ("calling periph start\n"));
3855 drv->periph_start(drv, work_ccb);
3856 } else {
3857 /*
3858 * Malloc failure in alloc_ccb
3859 */
3860 /*
3861 * XXX add us to a list to be run from free_ccb
3862 * if we don't have any ccbs active on this
3863 * device queue otherwise we may never get run
3864 * again.
3865 */
3866 break;
3867 }
3868
3869 /* Raise IPL for possible insertion and test at top of loop */
3870 s = splsoftcam();
3871
3872 if (drvq->entries > 0) {
3873 /* We have more work. Attempt to reschedule */
3874 xpt_schedule_dev_allocq(bus, device);
3875 }
3876 }
3877 devq->alloc_queue.qfrozen_cnt--;
3878 splx(s);
3879 }
3880
3881 static void
3882 xpt_run_dev_sendq(struct cam_eb *bus)
3883 {
3884 struct cam_devq *devq;
3885 int s;
3886
3887 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3888
3889 devq = bus->sim->devq;
3890
3891 s = splcam();
3892 devq->send_queue.qfrozen_cnt++;
3893 splx(s);
3894 s = splsoftcam();
3895 while ((devq->send_queue.entries > 0)
3896 && (devq->send_openings > 0)) {
3897 struct cam_ed_qinfo *qinfo;
3898 struct cam_ed *device;
3899 union ccb *work_ccb;
3900 struct cam_sim *sim;
3901 int ospl;
3902
3903 ospl = splcam();
3904 if (devq->send_queue.qfrozen_cnt > 1) {
3905 splx(ospl);
3906 break;
3907 }
3908
3909 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3910 CAMQ_HEAD);
3911 device = qinfo->device;
3912
3913 /*
3914 * If the device has been "frozen", don't attempt
3915 * to run it.
3916 */
3917 if (device->qfrozen_cnt > 0) {
3918 splx(ospl);
3919 continue;
3920 }
3921
3922 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3923 ("running device %p\n", device));
3924
3925 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3926 if (work_ccb == NULL) {
3927 printf("device on run queue with no ccbs???\n");
3928 splx(ospl);
3929 continue;
3930 }
3931
3932 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3933
3934 if (num_highpower <= 0) {
3935 /*
3936 * We got a high power command, but we
3937 * don't have any available slots. Freeze
3938 * the device queue until we have a slot
3939 * available.
3940 */
3941 device->qfrozen_cnt++;
3942 STAILQ_INSERT_TAIL(&highpowerq,
3943 &work_ccb->ccb_h,
3944 xpt_links.stqe);
3945
3946 splx(ospl);
3947 continue;
3948 } else {
3949 /*
3950 * Consume a high power slot while
3951 * this ccb runs.
3952 */
3953 num_highpower--;
3954 }
3955 }
3956 devq->active_dev = device;
3957 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3958
3959 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3960 splx(ospl);
3961
3962 devq->send_openings--;
3963 devq->send_active++;
3964
3965 if (device->ccbq.queue.entries > 0)
3966 xpt_schedule_dev_sendq(bus, device);
3967
3968 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3969 /*
3970 * The client wants to freeze the queue
3971 * after this CCB is sent.
3972 */
3973 ospl = splcam();
3974 device->qfrozen_cnt++;
3975 splx(ospl);
3976 }
3977
3978 splx(s);
3979
3980 /* In Target mode, the peripheral driver knows best... */
3981 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3982 if ((device->inq_flags & SID_CmdQue) != 0
3983 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3984 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3985 else
3986 /*
3987 * Clear this in case of a retried CCB that
3988 * failed due to a rejected tag.
3989 */
3990 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3991 }
3992
3993 /*
3994 * Device queues can be shared among multiple sim instances
3995 * that reside on different busses. Use the SIM in the queue
3996 * CCB's path, rather than the one in the bus that was passed
3997 * into this function.
3998 */
3999 sim = work_ccb->ccb_h.path->bus->sim;
4000 (*(sim->sim_action))(sim, work_ccb);
4001
4002 ospl = splcam();
4003 devq->active_dev = NULL;
4004 splx(ospl);
4005 /* Raise IPL for possible insertion and test at top of loop */
4006 s = splsoftcam();
4007 }
4008 splx(s);
4009 s = splcam();
4010 devq->send_queue.qfrozen_cnt--;
4011 splx(s);
4012 }
4013
4014 /*
4015 * This function merges stuff from the slave ccb into the master ccb, while
4016 * keeping important fields in the master ccb constant.
4017 */
4018 void
4019 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
4020 {
4021 GIANT_REQUIRED;
4022
4023 /*
4024 * Pull fields that are valid for peripheral drivers to set
4025 * into the master CCB along with the CCB "payload".
4026 */
4027 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
4028 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
4029 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
4030 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
4031 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
4032 sizeof(union ccb) - sizeof(struct ccb_hdr));
4033 }
4034
4035 void
4036 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
4037 {
4038 GIANT_REQUIRED;
4039
4040 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
4041 ccb_h->pinfo.priority = priority;
4042 ccb_h->path = path;
4043 ccb_h->path_id = path->bus->path_id;
4044 if (path->target)
4045 ccb_h->target_id = path->target->target_id;
4046 else
4047 ccb_h->target_id = CAM_TARGET_WILDCARD;
4048 if (path->device) {
4049 ccb_h->target_lun = path->device->lun_id;
4050 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
4051 } else {
4052 ccb_h->target_lun = CAM_TARGET_WILDCARD;
4053 }
4054 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
4055 ccb_h->flags = 0;
4056 }
4057
4058 /* Path manipulation functions */
4059 cam_status
4060 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
4061 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
4062 {
4063 struct cam_path *path;
4064 cam_status status;
4065
4066 GIANT_REQUIRED;
4067
4068 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT);
4069
4070 if (path == NULL) {
4071 status = CAM_RESRC_UNAVAIL;
4072 return(status);
4073 }
4074 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
4075 if (status != CAM_REQ_CMP) {
4076 free(path, M_CAMXPT);
4077 path = NULL;
4078 }
4079 *new_path_ptr = path;
4080 return (status);
4081 }
4082
4083 static cam_status
4084 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
4085 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
4086 {
4087 struct cam_eb *bus;
4088 struct cam_et *target;
4089 struct cam_ed *device;
4090 cam_status status;
4091 int s;
4092
4093 status = CAM_REQ_CMP; /* Completed without error */
4094 target = NULL; /* Wildcarded */
4095 device = NULL; /* Wildcarded */
4096
4097 /*
4098 * We will potentially modify the EDT, so block interrupts
4099 * that may attempt to create cam paths.
4100 */
4101 s = splcam();
4102 bus = xpt_find_bus(path_id);
4103 if (bus == NULL) {
4104 status = CAM_PATH_INVALID;
4105 } else {
4106 target = xpt_find_target(bus, target_id);
4107 if (target == NULL) {
4108 /* Create one */
4109 struct cam_et *new_target;
4110
4111 new_target = xpt_alloc_target(bus, target_id);
4112 if (new_target == NULL) {
4113 status = CAM_RESRC_UNAVAIL;
4114 } else {
4115 target = new_target;
4116 }
4117 }
4118 if (target != NULL) {
4119 device = xpt_find_device(target, lun_id);
4120 if (device == NULL) {
4121 /* Create one */
4122 struct cam_ed *new_device;
4123
4124 new_device = xpt_alloc_device(bus,
4125 target,
4126 lun_id);
4127 if (new_device == NULL) {
4128 status = CAM_RESRC_UNAVAIL;
4129 } else {
4130 device = new_device;
4131 }
4132 }
4133 }
4134 }
4135 splx(s);
4136
4137 /*
4138 * Only touch the user's data if we are successful.
4139 */
4140 if (status == CAM_REQ_CMP) {
4141 new_path->periph = perph;
4142 new_path->bus = bus;
4143 new_path->target = target;
4144 new_path->device = device;
4145 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
4146 } else {
4147 if (device != NULL)
4148 xpt_release_device(bus, target, device);
4149 if (target != NULL)
4150 xpt_release_target(bus, target);
4151 if (bus != NULL)
4152 xpt_release_bus(bus);
4153 }
4154 return (status);
4155 }
4156
4157 static void
4158 xpt_release_path(struct cam_path *path)
4159 {
4160 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
4161 if (path->device != NULL) {
4162 xpt_release_device(path->bus, path->target, path->device);
4163 path->device = NULL;
4164 }
4165 if (path->target != NULL) {
4166 xpt_release_target(path->bus, path->target);
4167 path->target = NULL;
4168 }
4169 if (path->bus != NULL) {
4170 xpt_release_bus(path->bus);
4171 path->bus = NULL;
4172 }
4173 }
4174
4175 void
4176 xpt_free_path(struct cam_path *path)
4177 {
4178 GIANT_REQUIRED;
4179
4180 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
4181 xpt_release_path(path);
4182 free(path, M_CAMXPT);
4183 }
4184
4185
4186 /*
4187 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
4188 * in path1, 2 for match with wildcards in path2.
4189 */
4190 int
4191 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
4192 {
4193 GIANT_REQUIRED;
4194
4195 int retval = 0;
4196
4197 if (path1->bus != path2->bus) {
4198 if (path1->bus->path_id == CAM_BUS_WILDCARD)
4199 retval = 1;
4200 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
4201 retval = 2;
4202 else
4203 return (-1);
4204 }
4205 if (path1->target != path2->target) {
4206 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
4207 if (retval == 0)
4208 retval = 1;
4209 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
4210 retval = 2;
4211 else
4212 return (-1);
4213 }
4214 if (path1->device != path2->device) {
4215 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
4216 if (retval == 0)
4217 retval = 1;
4218 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
4219 retval = 2;
4220 else
4221 return (-1);
4222 }
4223 return (retval);
4224 }
4225
4226 void
4227 xpt_print_path(struct cam_path *path)
4228 {
4229 GIANT_REQUIRED;
4230
4231 if (path == NULL)
4232 printf("(nopath): ");
4233 else {
4234 if (path->periph != NULL)
4235 printf("(%s%d:", path->periph->periph_name,
4236 path->periph->unit_number);
4237 else
4238 printf("(noperiph:");
4239
4240 if (path->bus != NULL)
4241 printf("%s%d:%d:", path->bus->sim->sim_name,
4242 path->bus->sim->unit_number,
4243 path->bus->sim->bus_id);
4244 else
4245 printf("nobus:");
4246
4247 if (path->target != NULL)
4248 printf("%d:", path->target->target_id);
4249 else
4250 printf("X:");
4251
4252 if (path->device != NULL)
4253 printf("%d): ", path->device->lun_id);
4254 else
4255 printf("X): ");
4256 }
4257 }
4258
4259 int
4260 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
4261 {
4262 struct sbuf sb;
4263
4264 GIANT_REQUIRED;
4265
4266 sbuf_new(&sb, str, str_len, 0);
4267
4268 if (path == NULL)
4269 sbuf_printf(&sb, "(nopath): ");
4270 else {
4271 if (path->periph != NULL)
4272 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
4273 path->periph->unit_number);
4274 else
4275 sbuf_printf(&sb, "(noperiph:");
4276
4277 if (path->bus != NULL)
4278 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
4279 path->bus->sim->unit_number,
4280 path->bus->sim->bus_id);
4281 else
4282 sbuf_printf(&sb, "nobus:");
4283
4284 if (path->target != NULL)
4285 sbuf_printf(&sb, "%d:", path->target->target_id);
4286 else
4287 sbuf_printf(&sb, "X:");
4288
4289 if (path->device != NULL)
4290 sbuf_printf(&sb, "%d): ", path->device->lun_id);
4291 else
4292 sbuf_printf(&sb, "X): ");
4293 }
4294 sbuf_finish(&sb);
4295
4296 return(sbuf_len(&sb));
4297 }
4298
4299 path_id_t
4300 xpt_path_path_id(struct cam_path *path)
4301 {
4302 GIANT_REQUIRED;
4303
4304 return(path->bus->path_id);
4305 }
4306
4307 target_id_t
4308 xpt_path_target_id(struct cam_path *path)
4309 {
4310 GIANT_REQUIRED;
4311
4312 if (path->target != NULL)
4313 return (path->target->target_id);
4314 else
4315 return (CAM_TARGET_WILDCARD);
4316 }
4317
4318 lun_id_t
4319 xpt_path_lun_id(struct cam_path *path)
4320 {
4321 GIANT_REQUIRED;
4322
4323 if (path->device != NULL)
4324 return (path->device->lun_id);
4325 else
4326 return (CAM_LUN_WILDCARD);
4327 }
4328
4329 struct cam_sim *
4330 xpt_path_sim(struct cam_path *path)
4331 {
4332 GIANT_REQUIRED;
4333
4334 return (path->bus->sim);
4335 }
4336
4337 struct cam_periph*
4338 xpt_path_periph(struct cam_path *path)
4339 {
4340 GIANT_REQUIRED;
4341
4342 return (path->periph);
4343 }
4344
4345 /*
4346 * Release a CAM control block for the caller. Remit the cost of the structure
4347 * to the device referenced by the path. If the this device had no 'credits'
4348 * and peripheral drivers have registered async callbacks for this notification
4349 * call them now.
4350 */
4351 void
4352 xpt_release_ccb(union ccb *free_ccb)
4353 {
4354 int s;
4355 struct cam_path *path;
4356 struct cam_ed *device;
4357 struct cam_eb *bus;
4358
4359 GIANT_REQUIRED;
4360
4361 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4362 path = free_ccb->ccb_h.path;
4363 device = path->device;
4364 bus = path->bus;
4365 s = splsoftcam();
4366 cam_ccbq_release_opening(&device->ccbq);
4367 if (xpt_ccb_count > xpt_max_ccbs) {
4368 xpt_free_ccb(free_ccb);
4369 xpt_ccb_count--;
4370 } else {
4371 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle);
4372 }
4373 if (bus->sim->devq == NULL) {
4374 splx(s);
4375 return;
4376 }
4377 bus->sim->devq->alloc_openings++;
4378 bus->sim->devq->alloc_active--;
4379 /* XXX Turn this into an inline function - xpt_run_device?? */
4380 if ((device_is_alloc_queued(device) == 0)
4381 && (device->drvq.entries > 0)) {
4382 xpt_schedule_dev_allocq(bus, device);
4383 }
4384 splx(s);
4385 if (dev_allocq_is_runnable(bus->sim->devq))
4386 xpt_run_dev_allocq(bus);
4387 }
4388
4389 /* Functions accessed by SIM drivers */
4390
4391 /*
4392 * A sim structure, listing the SIM entry points and instance
4393 * identification info is passed to xpt_bus_register to hook the SIM
4394 * into the CAM framework. xpt_bus_register creates a cam_eb entry
4395 * for this new bus and places it in the array of busses and assigns
4396 * it a path_id. The path_id may be influenced by "hard wiring"
4397 * information specified by the user. Once interrupt services are
4398 * availible, the bus will be probed.
4399 */
4400 int32_t
4401 xpt_bus_register(struct cam_sim *sim, u_int32_t bus)
4402 {
4403 struct cam_eb *new_bus;
4404 struct cam_eb *old_bus;
4405 struct ccb_pathinq cpi;
4406 int s;
4407
4408 GIANT_REQUIRED;
4409
4410 sim->bus_id = bus;
4411 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4412 M_CAMXPT, M_NOWAIT);
4413 if (new_bus == NULL) {
4414 /* Couldn't satisfy request */
4415 return (CAM_RESRC_UNAVAIL);
4416 }
4417
4418 if (strcmp(sim->sim_name, "xpt") != 0) {
4419
4420 sim->path_id =
4421 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4422 }
4423
4424 TAILQ_INIT(&new_bus->et_entries);
4425 new_bus->path_id = sim->path_id;
4426 new_bus->sim = sim;
4427 timevalclear(&new_bus->last_reset);
4428 new_bus->flags = 0;
4429 new_bus->refcount = 1; /* Held until a bus_deregister event */
4430 new_bus->generation = 0;
4431 s = splcam();
4432 old_bus = TAILQ_FIRST(&xpt_busses);
4433 while (old_bus != NULL
4434 && old_bus->path_id < new_bus->path_id)
4435 old_bus = TAILQ_NEXT(old_bus, links);
4436 if (old_bus != NULL)
4437 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4438 else
4439 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links);
4440 bus_generation++;
4441 splx(s);
4442
4443 /* Notify interested parties */
4444 if (sim->path_id != CAM_XPT_PATH_ID) {
4445 struct cam_path path;
4446
4447 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4448 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4449 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4450 cpi.ccb_h.func_code = XPT_PATH_INQ;
4451 xpt_action((union ccb *)&cpi);
4452 xpt_async(AC_PATH_REGISTERED, &path, &cpi);
4453 xpt_release_path(&path);
4454 }
4455 return (CAM_SUCCESS);
4456 }
4457
4458 int32_t
4459 xpt_bus_deregister(path_id_t pathid)
4460 {
4461 struct cam_path bus_path;
4462 struct cam_ed *device;
4463 struct cam_ed_qinfo *qinfo;
4464 struct cam_devq *devq;
4465 struct cam_periph *periph;
4466 struct cam_sim *ccbsim;
4467 union ccb *work_ccb;
4468 cam_status status;
4469
4470 GIANT_REQUIRED;
4471
4472 status = xpt_compile_path(&bus_path, NULL, pathid,
4473 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4474 if (status != CAM_REQ_CMP)
4475 return (status);
4476
4477 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4478 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4479
4480 /* The SIM may be gone, so use a dummy SIM for any stray operations. */
4481 devq = bus_path.bus->sim->devq;
4482 bus_path.bus->sim = &cam_dead_sim;
4483
4484 /* Execute any pending operations now. */
4485 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
4486 CAMQ_HEAD)) != NULL ||
4487 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
4488 CAMQ_HEAD)) != NULL) {
4489 do {
4490 device = qinfo->device;
4491 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
4492 if (work_ccb != NULL) {
4493 devq->active_dev = device;
4494 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
4495 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
4496 ccbsim = work_ccb->ccb_h.path->bus->sim;
4497 (*(ccbsim->sim_action))(ccbsim, work_ccb);
4498 }
4499
4500 periph = (struct cam_periph *)camq_remove(&device->drvq,
4501 CAMQ_HEAD);
4502 if (periph != NULL)
4503 xpt_schedule(periph, periph->pinfo.priority);
4504 } while (work_ccb != NULL || periph != NULL);
4505 }
4506
4507 /* Make sure all completed CCBs are processed. */
4508 while (!TAILQ_EMPTY(&cam_bioq)) {
4509 camisr(&cam_bioq);
4510
4511 /* Repeat the async's for the benefit of any new devices. */
4512 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4513 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4514 }
4515
4516 /* Release the reference count held while registered. */
4517 xpt_release_bus(bus_path.bus);
4518 xpt_release_path(&bus_path);
4519
4520 /* Recheck for more completed CCBs. */
4521 while (!TAILQ_EMPTY(&cam_bioq))
4522 camisr(&cam_bioq);
4523
4524 return (CAM_REQ_CMP);
4525 }
4526
4527 static path_id_t
4528 xptnextfreepathid(void)
4529 {
4530 struct cam_eb *bus;
4531 path_id_t pathid;
4532 const char *strval;
4533
4534 pathid = 0;
4535 bus = TAILQ_FIRST(&xpt_busses);
4536 retry:
4537 /* Find an unoccupied pathid */
4538 while (bus != NULL
4539 && bus->path_id <= pathid) {
4540 if (bus->path_id == pathid)
4541 pathid++;
4542 bus = TAILQ_NEXT(bus, links);
4543 }
4544
4545 /*
4546 * Ensure that this pathid is not reserved for
4547 * a bus that may be registered in the future.
4548 */
4549 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4550 ++pathid;
4551 /* Start the search over */
4552 goto retry;
4553 }
4554 return (pathid);
4555 }
4556
4557 static path_id_t
4558 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4559 {
4560 path_id_t pathid;
4561 int i, dunit, val;
4562 char buf[32];
4563 const char *dname;
4564
4565 pathid = CAM_XPT_PATH_ID;
4566 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4567 i = 0;
4568 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4569 if (strcmp(dname, "scbus")) {
4570 /* Avoid a bit of foot shooting. */
4571 continue;
4572 }
4573 if (dunit < 0) /* unwired?! */
4574 continue;
4575 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4576 if (sim_bus == val) {
4577 pathid = dunit;
4578 break;
4579 }
4580 } else if (sim_bus == 0) {
4581 /* Unspecified matches bus 0 */
4582 pathid = dunit;
4583 break;
4584 } else {
4585 printf("Ambiguous scbus configuration for %s%d "
4586 "bus %d, cannot wire down. The kernel "
4587 "config entry for scbus%d should "
4588 "specify a controller bus.\n"
4589 "Scbus will be assigned dynamically.\n",
4590 sim_name, sim_unit, sim_bus, dunit);
4591 break;
4592 }
4593 }
4594
4595 if (pathid == CAM_XPT_PATH_ID)
4596 pathid = xptnextfreepathid();
4597 return (pathid);
4598 }
4599
4600 void
4601 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4602 {
4603 struct cam_eb *bus;
4604 struct cam_et *target, *next_target;
4605 struct cam_ed *device, *next_device;
4606 int s;
4607
4608 GIANT_REQUIRED;
4609
4610 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4611
4612 /*
4613 * Most async events come from a CAM interrupt context. In
4614 * a few cases, the error recovery code at the peripheral layer,
4615 * which may run from our SWI or a process context, may signal
4616 * deferred events with a call to xpt_async. Ensure async
4617 * notifications are serialized by blocking cam interrupts.
4618 */
4619 s = splcam();
4620
4621 bus = path->bus;
4622
4623 if (async_code == AC_BUS_RESET) {
4624 int s;
4625
4626 s = splclock();
4627 /* Update our notion of when the last reset occurred */
4628 microtime(&bus->last_reset);
4629 splx(s);
4630 }
4631
4632 for (target = TAILQ_FIRST(&bus->et_entries);
4633 target != NULL;
4634 target = next_target) {
4635
4636 next_target = TAILQ_NEXT(target, links);
4637
4638 if (path->target != target
4639 && path->target->target_id != CAM_TARGET_WILDCARD
4640 && target->target_id != CAM_TARGET_WILDCARD)
4641 continue;
4642
4643 if (async_code == AC_SENT_BDR) {
4644 int s;
4645
4646 /* Update our notion of when the last reset occurred */
4647 s = splclock();
4648 microtime(&path->target->last_reset);
4649 splx(s);
4650 }
4651
4652 for (device = TAILQ_FIRST(&target->ed_entries);
4653 device != NULL;
4654 device = next_device) {
4655
4656 next_device = TAILQ_NEXT(device, links);
4657
4658 if (path->device != device
4659 && path->device->lun_id != CAM_LUN_WILDCARD
4660 && device->lun_id != CAM_LUN_WILDCARD)
4661 continue;
4662
4663 xpt_dev_async(async_code, bus, target,
4664 device, async_arg);
4665
4666 xpt_async_bcast(&device->asyncs, async_code,
4667 path, async_arg);
4668 }
4669 }
4670
4671 /*
4672 * If this wasn't a fully wildcarded async, tell all
4673 * clients that want all async events.
4674 */
4675 if (bus != xpt_periph->path->bus)
4676 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4677 path, async_arg);
4678 splx(s);
4679 }
4680
4681 static void
4682 xpt_async_bcast(struct async_list *async_head,
4683 u_int32_t async_code,
4684 struct cam_path *path, void *async_arg)
4685 {
4686 struct async_node *cur_entry;
4687
4688 cur_entry = SLIST_FIRST(async_head);
4689 while (cur_entry != NULL) {
4690 struct async_node *next_entry;
4691 /*
4692 * Grab the next list entry before we call the current
4693 * entry's callback. This is because the callback function
4694 * can delete its async callback entry.
4695 */
4696 next_entry = SLIST_NEXT(cur_entry, links);
4697 if ((cur_entry->event_enable & async_code) != 0)
4698 cur_entry->callback(cur_entry->callback_arg,
4699 async_code, path,
4700 async_arg);
4701 cur_entry = next_entry;
4702 }
4703 }
4704
4705 /*
4706 * Handle any per-device event notifications that require action by the XPT.
4707 */
4708 static void
4709 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4710 struct cam_ed *device, void *async_arg)
4711 {
4712 cam_status status;
4713 struct cam_path newpath;
4714
4715 /*
4716 * We only need to handle events for real devices.
4717 */
4718 if (target->target_id == CAM_TARGET_WILDCARD
4719 || device->lun_id == CAM_LUN_WILDCARD)
4720 return;
4721
4722 /*
4723 * We need our own path with wildcards expanded to
4724 * handle certain types of events.
4725 */
4726 if ((async_code == AC_SENT_BDR)
4727 || (async_code == AC_BUS_RESET)
4728 || (async_code == AC_INQ_CHANGED))
4729 status = xpt_compile_path(&newpath, NULL,
4730 bus->path_id,
4731 target->target_id,
4732 device->lun_id);
4733 else
4734 status = CAM_REQ_CMP_ERR;
4735
4736 if (status == CAM_REQ_CMP) {
4737
4738 /*
4739 * Allow transfer negotiation to occur in a
4740 * tag free environment.
4741 */
4742 if (async_code == AC_SENT_BDR
4743 || async_code == AC_BUS_RESET)
4744 xpt_toggle_tags(&newpath);
4745
4746 if (async_code == AC_INQ_CHANGED) {
4747 /*
4748 * We've sent a start unit command, or
4749 * something similar to a device that
4750 * may have caused its inquiry data to
4751 * change. So we re-scan the device to
4752 * refresh the inquiry data for it.
4753 */
4754 xpt_scan_lun(newpath.periph, &newpath,
4755 CAM_EXPECT_INQ_CHANGE, NULL);
4756 }
4757 xpt_release_path(&newpath);
4758 } else if (async_code == AC_LOST_DEVICE) {
4759 device->flags |= CAM_DEV_UNCONFIGURED;
4760 } else if (async_code == AC_TRANSFER_NEG) {
4761 struct ccb_trans_settings *settings;
4762
4763 settings = (struct ccb_trans_settings *)async_arg;
4764 xpt_set_transfer_settings(settings, device,
4765 /*async_update*/TRUE);
4766 }
4767 }
4768
4769 u_int32_t
4770 xpt_freeze_devq(struct cam_path *path, u_int count)
4771 {
4772 int s;
4773 struct ccb_hdr *ccbh;
4774
4775 GIANT_REQUIRED;
4776
4777 s = splcam();
4778 path->device->qfrozen_cnt += count;
4779
4780 /*
4781 * Mark the last CCB in the queue as needing
4782 * to be requeued if the driver hasn't
4783 * changed it's state yet. This fixes a race
4784 * where a ccb is just about to be queued to
4785 * a controller driver when it's interrupt routine
4786 * freezes the queue. To completly close the
4787 * hole, controller drives must check to see
4788 * if a ccb's status is still CAM_REQ_INPROG
4789 * under spl protection just before they queue
4790 * the CCB. See ahc_action/ahc_freeze_devq for
4791 * an example.
4792 */
4793 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4794 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4795 ccbh->status = CAM_REQUEUE_REQ;
4796 splx(s);
4797 return (path->device->qfrozen_cnt);
4798 }
4799
4800 u_int32_t
4801 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4802 {
4803 GIANT_REQUIRED;
4804
4805 sim->devq->send_queue.qfrozen_cnt += count;
4806 if (sim->devq->active_dev != NULL) {
4807 struct ccb_hdr *ccbh;
4808
4809 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4810 ccb_hdr_tailq);
4811 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4812 ccbh->status = CAM_REQUEUE_REQ;
4813 }
4814 return (sim->devq->send_queue.qfrozen_cnt);
4815 }
4816
4817 static void
4818 xpt_release_devq_timeout(void *arg)
4819 {
4820 struct cam_ed *device;
4821
4822 device = (struct cam_ed *)arg;
4823
4824 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4825 }
4826
4827 void
4828 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4829 {
4830 GIANT_REQUIRED;
4831
4832 xpt_release_devq_device(path->device, count, run_queue);
4833 }
4834
4835 static void
4836 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4837 {
4838 int rundevq;
4839 int s0, s1;
4840
4841 rundevq = 0;
4842 s0 = splsoftcam();
4843 s1 = splcam();
4844 if (dev->qfrozen_cnt > 0) {
4845
4846 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4847 dev->qfrozen_cnt -= count;
4848 if (dev->qfrozen_cnt == 0) {
4849
4850 /*
4851 * No longer need to wait for a successful
4852 * command completion.
4853 */
4854 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4855
4856 /*
4857 * Remove any timeouts that might be scheduled
4858 * to release this queue.
4859 */
4860 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4861 untimeout(xpt_release_devq_timeout, dev,
4862 dev->c_handle);
4863 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4864 }
4865
4866 /*
4867 * Now that we are unfrozen schedule the
4868 * device so any pending transactions are
4869 * run.
4870 */
4871 if ((dev->ccbq.queue.entries > 0)
4872 && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4873 && (run_queue != 0)) {
4874 rundevq = 1;
4875 }
4876 }
4877 }
4878 splx(s1);
4879 if (rundevq != 0)
4880 xpt_run_dev_sendq(dev->target->bus);
4881 splx(s0);
4882 }
4883
4884 void
4885 xpt_release_simq(struct cam_sim *sim, int run_queue)
4886 {
4887 int s;
4888 struct camq *sendq;
4889
4890 GIANT_REQUIRED;
4891
4892 sendq = &(sim->devq->send_queue);
4893 s = splcam();
4894 if (sendq->qfrozen_cnt > 0) {
4895
4896 sendq->qfrozen_cnt--;
4897 if (sendq->qfrozen_cnt == 0) {
4898 struct cam_eb *bus;
4899
4900 /*
4901 * If there is a timeout scheduled to release this
4902 * sim queue, remove it. The queue frozen count is
4903 * already at 0.
4904 */
4905 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4906 untimeout(xpt_release_simq_timeout, sim,
4907 sim->c_handle);
4908 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4909 }
4910 bus = xpt_find_bus(sim->path_id);
4911 splx(s);
4912
4913 if (run_queue) {
4914 /*
4915 * Now that we are unfrozen run the send queue.
4916 */
4917 xpt_run_dev_sendq(bus);
4918 }
4919 xpt_release_bus(bus);
4920 } else
4921 splx(s);
4922 } else
4923 splx(s);
4924 }
4925
4926 static void
4927 xpt_release_simq_timeout(void *arg)
4928 {
4929 struct cam_sim *sim;
4930
4931 sim = (struct cam_sim *)arg;
4932 xpt_release_simq(sim, /* run_queue */ TRUE);
4933 }
4934
4935 void
4936 xpt_done(union ccb *done_ccb)
4937 {
4938 int s;
4939
4940 s = splcam();
4941
4942 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4943 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4944 /*
4945 * Queue up the request for handling by our SWI handler
4946 * any of the "non-immediate" type of ccbs.
4947 */
4948 switch (done_ccb->ccb_h.path->periph->type) {
4949 case CAM_PERIPH_BIO:
4950 mtx_lock(&cam_bioq_lock);
4951 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h,
4952 sim_links.tqe);
4953 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4954 mtx_unlock(&cam_bioq_lock);
4955 swi_sched(cambio_ih, 0);
4956 break;
4957 default:
4958 panic("unknown periph type %d",
4959 done_ccb->ccb_h.path->periph->type);
4960 }
4961 }
4962 splx(s);
4963 }
4964
4965 union ccb *
4966 xpt_alloc_ccb()
4967 {
4968 union ccb *new_ccb;
4969
4970 GIANT_REQUIRED;
4971
4972 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_WAITOK);
4973 return (new_ccb);
4974 }
4975
4976 union ccb *
4977 xpt_alloc_ccb_nowait()
4978 {
4979 union ccb *new_ccb;
4980
4981 GIANT_REQUIRED;
4982
4983 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_NOWAIT);
4984 return (new_ccb);
4985 }
4986
4987 void
4988 xpt_free_ccb(union ccb *free_ccb)
4989 {
4990 free(free_ccb, M_CAMXPT);
4991 }
4992
4993
4994
4995 /* Private XPT functions */
4996
4997 /*
4998 * Get a CAM control block for the caller. Charge the structure to the device
4999 * referenced by the path. If the this device has no 'credits' then the
5000 * device already has the maximum number of outstanding operations under way
5001 * and we return NULL. If we don't have sufficient resources to allocate more
5002 * ccbs, we also return NULL.
5003 */
5004 static union ccb *
5005 xpt_get_ccb(struct cam_ed *device)
5006 {
5007 union ccb *new_ccb;
5008 int s;
5009
5010 s = splsoftcam();
5011 if ((new_ccb = (union ccb *)SLIST_FIRST(&ccb_freeq)) == NULL) {
5012 new_ccb = xpt_alloc_ccb_nowait();
5013 if (new_ccb == NULL) {
5014 splx(s);
5015 return (NULL);
5016 }
5017 callout_handle_init(&new_ccb->ccb_h.timeout_ch);
5018 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h,
5019 xpt_links.sle);
5020 xpt_ccb_count++;
5021 }
5022 cam_ccbq_take_opening(&device->ccbq);
5023 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle);
5024 splx(s);
5025 return (new_ccb);
5026 }
5027
5028 static void
5029 xpt_release_bus(struct cam_eb *bus)
5030 {
5031 int s;
5032
5033 s = splcam();
5034 if ((--bus->refcount == 0)
5035 && (TAILQ_FIRST(&bus->et_entries) == NULL)) {
5036 TAILQ_REMOVE(&xpt_busses, bus, links);
5037 bus_generation++;
5038 splx(s);
5039 free(bus, M_CAMXPT);
5040 } else
5041 splx(s);
5042 }
5043
5044 static struct cam_et *
5045 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
5046 {
5047 struct cam_et *target;
5048
5049 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT);
5050 if (target != NULL) {
5051 struct cam_et *cur_target;
5052
5053 TAILQ_INIT(&target->ed_entries);
5054 target->bus = bus;
5055 target->target_id = target_id;
5056 target->refcount = 1;
5057 target->generation = 0;
5058 timevalclear(&target->last_reset);
5059 /*
5060 * Hold a reference to our parent bus so it
5061 * will not go away before we do.
5062 */
5063 bus->refcount++;
5064
5065 /* Insertion sort into our bus's target list */
5066 cur_target = TAILQ_FIRST(&bus->et_entries);
5067 while (cur_target != NULL && cur_target->target_id < target_id)
5068 cur_target = TAILQ_NEXT(cur_target, links);
5069
5070 if (cur_target != NULL) {
5071 TAILQ_INSERT_BEFORE(cur_target, target, links);
5072 } else {
5073 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
5074 }
5075 bus->generation++;
5076 }
5077 return (target);
5078 }
5079
5080 static void
5081 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
5082 {
5083 int s;
5084
5085 s = splcam();
5086 if ((--target->refcount == 0)
5087 && (TAILQ_FIRST(&target->ed_entries) == NULL)) {
5088 TAILQ_REMOVE(&bus->et_entries, target, links);
5089 bus->generation++;
5090 splx(s);
5091 free(target, M_CAMXPT);
5092 xpt_release_bus(bus);
5093 } else
5094 splx(s);
5095 }
5096
5097 static struct cam_ed *
5098 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
5099 {
5100 #ifdef CAM_NEW_TRAN_CODE
5101 struct cam_path path;
5102 #endif /* CAM_NEW_TRAN_CODE */
5103 struct cam_ed *device;
5104 struct cam_devq *devq;
5105 cam_status status;
5106
5107 if (SIM_DEAD(bus->sim))
5108 return (NULL);
5109
5110 /* Make space for us in the device queue on our bus */
5111 devq = bus->sim->devq;
5112 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
5113
5114 if (status != CAM_REQ_CMP) {
5115 device = NULL;
5116 } else {
5117 device = (struct cam_ed *)malloc(sizeof(*device),
5118 M_CAMXPT, M_NOWAIT);
5119 }
5120
5121 if (device != NULL) {
5122 struct cam_ed *cur_device;
5123
5124 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
5125 device->alloc_ccb_entry.device = device;
5126 cam_init_pinfo(&device->send_ccb_entry.pinfo);
5127 device->send_ccb_entry.device = device;
5128 device->target = target;
5129 device->lun_id = lun_id;
5130 /* Initialize our queues */
5131 if (camq_init(&device->drvq, 0) != 0) {
5132 free(device, M_CAMXPT);
5133 return (NULL);
5134 }
5135 if (cam_ccbq_init(&device->ccbq,
5136 bus->sim->max_dev_openings) != 0) {
5137 camq_fini(&device->drvq);
5138 free(device, M_CAMXPT);
5139 return (NULL);
5140 }
5141 SLIST_INIT(&device->asyncs);
5142 SLIST_INIT(&device->periphs);
5143 device->generation = 0;
5144 device->owner = NULL;
5145 /*
5146 * Take the default quirk entry until we have inquiry
5147 * data and can determine a better quirk to use.
5148 */
5149 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
5150 bzero(&device->inq_data, sizeof(device->inq_data));
5151 device->inq_flags = 0;
5152 device->queue_flags = 0;
5153 device->serial_num = NULL;
5154 device->serial_num_len = 0;
5155 device->qfrozen_cnt = 0;
5156 device->flags = CAM_DEV_UNCONFIGURED;
5157 device->tag_delay_count = 0;
5158 device->tag_saved_openings = 0;
5159 device->refcount = 1;
5160 callout_handle_init(&device->c_handle);
5161
5162 /*
5163 * Hold a reference to our parent target so it
5164 * will not go away before we do.
5165 */
5166 target->refcount++;
5167
5168 /*
5169 * XXX should be limited by number of CCBs this bus can
5170 * do.
5171 */
5172 xpt_max_ccbs += device->ccbq.devq_openings;
5173 /* Insertion sort into our target's device list */
5174 cur_device = TAILQ_FIRST(&target->ed_entries);
5175 while (cur_device != NULL && cur_device->lun_id < lun_id)
5176 cur_device = TAILQ_NEXT(cur_device, links);
5177 if (cur_device != NULL) {
5178 TAILQ_INSERT_BEFORE(cur_device, device, links);
5179 } else {
5180 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
5181 }
5182 target->generation++;
5183 #ifdef CAM_NEW_TRAN_CODE
5184 if (lun_id != CAM_LUN_WILDCARD) {
5185 xpt_compile_path(&path,
5186 NULL,
5187 bus->path_id,
5188 target->target_id,
5189 lun_id);
5190 xpt_devise_transport(&path);
5191 xpt_release_path(&path);
5192 }
5193 #endif /* CAM_NEW_TRAN_CODE */
5194 }
5195 return (device);
5196 }
5197
5198 static void
5199 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
5200 struct cam_ed *device)
5201 {
5202 int s;
5203
5204 s = splcam();
5205 if ((--device->refcount == 0)
5206 && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) {
5207 struct cam_devq *devq;
5208
5209 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
5210 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
5211 panic("Removing device while still queued for ccbs");
5212
5213 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
5214 untimeout(xpt_release_devq_timeout, device,
5215 device->c_handle);
5216
5217 TAILQ_REMOVE(&target->ed_entries, device,links);
5218 target->generation++;
5219 xpt_max_ccbs -= device->ccbq.devq_openings;
5220 if (!SIM_DEAD(bus->sim)) {
5221 /* Release our slot in the devq */
5222 devq = bus->sim->devq;
5223 cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
5224 }
5225 splx(s);
5226 camq_fini(&device->drvq);
5227 camq_fini(&device->ccbq.queue);
5228 free(device, M_CAMXPT);
5229 xpt_release_target(bus, target);
5230 } else
5231 splx(s);
5232 }
5233
5234 static u_int32_t
5235 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5236 {
5237 int s;
5238 int diff;
5239 int result;
5240 struct cam_ed *dev;
5241
5242 dev = path->device;
5243 s = splsoftcam();
5244
5245 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
5246 result = cam_ccbq_resize(&dev->ccbq, newopenings);
5247 if (result == CAM_REQ_CMP && (diff < 0)) {
5248 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
5249 }
5250 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5251 || (dev->inq_flags & SID_CmdQue) != 0)
5252 dev->tag_saved_openings = newopenings;
5253 /* Adjust the global limit */
5254 xpt_max_ccbs += diff;
5255 splx(s);
5256 return (result);
5257 }
5258
5259 static struct cam_eb *
5260 xpt_find_bus(path_id_t path_id)
5261 {
5262 struct cam_eb *bus;
5263
5264 for (bus = TAILQ_FIRST(&xpt_busses);
5265 bus != NULL;
5266 bus = TAILQ_NEXT(bus, links)) {
5267 if (bus->path_id == path_id) {
5268 bus->refcount++;
5269 break;
5270 }
5271 }
5272 return (bus);
5273 }
5274
5275 static struct cam_et *
5276 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5277 {
5278 struct cam_et *target;
5279
5280 for (target = TAILQ_FIRST(&bus->et_entries);
5281 target != NULL;
5282 target = TAILQ_NEXT(target, links)) {
5283 if (target->target_id == target_id) {
5284 target->refcount++;
5285 break;
5286 }
5287 }
5288 return (target);
5289 }
5290
5291 static struct cam_ed *
5292 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5293 {
5294 struct cam_ed *device;
5295
5296 for (device = TAILQ_FIRST(&target->ed_entries);
5297 device != NULL;
5298 device = TAILQ_NEXT(device, links)) {
5299 if (device->lun_id == lun_id) {
5300 device->refcount++;
5301 break;
5302 }
5303 }
5304 return (device);
5305 }
5306
5307 typedef struct {
5308 union ccb *request_ccb;
5309 struct ccb_pathinq *cpi;
5310 int pending_count;
5311 } xpt_scan_bus_info;
5312
5313 /*
5314 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
5315 * As the scan progresses, xpt_scan_bus is used as the
5316 * callback on completion function.
5317 */
5318 static void
5319 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
5320 {
5321 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5322 ("xpt_scan_bus\n"));
5323 switch (request_ccb->ccb_h.func_code) {
5324 case XPT_SCAN_BUS:
5325 {
5326 xpt_scan_bus_info *scan_info;
5327 union ccb *work_ccb;
5328 struct cam_path *path;
5329 u_int i;
5330 u_int max_target;
5331 u_int initiator_id;
5332
5333 /* Find out the characteristics of the bus */
5334 work_ccb = xpt_alloc_ccb();
5335 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
5336 request_ccb->ccb_h.pinfo.priority);
5337 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
5338 xpt_action(work_ccb);
5339 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
5340 request_ccb->ccb_h.status = work_ccb->ccb_h.status;
5341 xpt_free_ccb(work_ccb);
5342 xpt_done(request_ccb);
5343 return;
5344 }
5345
5346 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5347 /*
5348 * Can't scan the bus on an adapter that
5349 * cannot perform the initiator role.
5350 */
5351 request_ccb->ccb_h.status = CAM_REQ_CMP;
5352 xpt_free_ccb(work_ccb);
5353 xpt_done(request_ccb);
5354 return;
5355 }
5356
5357 /* Save some state for use while we probe for devices */
5358 scan_info = (xpt_scan_bus_info *)
5359 malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_WAITOK);
5360 scan_info->request_ccb = request_ccb;
5361 scan_info->cpi = &work_ccb->cpi;
5362
5363 /* Cache on our stack so we can work asynchronously */
5364 max_target = scan_info->cpi->max_target;
5365 initiator_id = scan_info->cpi->initiator_id;
5366
5367 /*
5368 * Don't count the initiator if the
5369 * initiator is addressable.
5370 */
5371 scan_info->pending_count = max_target + 1;
5372 if (initiator_id <= max_target)
5373 scan_info->pending_count--;
5374
5375 for (i = 0; i <= max_target; i++) {
5376 cam_status status;
5377 if (i == initiator_id)
5378 continue;
5379
5380 status = xpt_create_path(&path, xpt_periph,
5381 request_ccb->ccb_h.path_id,
5382 i, 0);
5383 if (status != CAM_REQ_CMP) {
5384 printf("xpt_scan_bus: xpt_create_path failed"
5385 " with status %#x, bus scan halted\n",
5386 status);
5387 break;
5388 }
5389 work_ccb = xpt_alloc_ccb();
5390 xpt_setup_ccb(&work_ccb->ccb_h, path,
5391 request_ccb->ccb_h.pinfo.priority);
5392 work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5393 work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5394 work_ccb->ccb_h.ppriv_ptr0 = scan_info;
5395 work_ccb->crcn.flags = request_ccb->crcn.flags;
5396 xpt_action(work_ccb);
5397 }
5398 break;
5399 }
5400 case XPT_SCAN_LUN:
5401 {
5402 xpt_scan_bus_info *scan_info;
5403 path_id_t path_id;
5404 target_id_t target_id;
5405 lun_id_t lun_id;
5406
5407 /* Reuse the same CCB to query if a device was really found */
5408 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
5409 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
5410 request_ccb->ccb_h.pinfo.priority);
5411 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5412
5413 path_id = request_ccb->ccb_h.path_id;
5414 target_id = request_ccb->ccb_h.target_id;
5415 lun_id = request_ccb->ccb_h.target_lun;
5416 xpt_action(request_ccb);
5417
5418 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
5419 struct cam_ed *device;
5420 struct cam_et *target;
5421 int s, phl;
5422
5423 /*
5424 * If we already probed lun 0 successfully, or
5425 * we have additional configured luns on this
5426 * target that might have "gone away", go onto
5427 * the next lun.
5428 */
5429 target = request_ccb->ccb_h.path->target;
5430 /*
5431 * We may touch devices that we don't
5432 * hold references too, so ensure they
5433 * don't disappear out from under us.
5434 * The target above is referenced by the
5435 * path in the request ccb.
5436 */
5437 phl = 0;
5438 s = splcam();
5439 device = TAILQ_FIRST(&target->ed_entries);
5440 if (device != NULL) {
5441 phl = CAN_SRCH_HI_SPARSE(device);
5442 if (device->lun_id == 0)
5443 device = TAILQ_NEXT(device, links);
5444 }
5445 splx(s);
5446 if ((lun_id != 0) || (device != NULL)) {
5447 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
5448 lun_id++;
5449 }
5450 } else {
5451 struct cam_ed *device;
5452
5453 device = request_ccb->ccb_h.path->device;
5454
5455 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
5456 /* Try the next lun */
5457 if (lun_id < (CAM_SCSI2_MAXLUN-1)
5458 || CAN_SRCH_HI_DENSE(device))
5459 lun_id++;
5460 }
5461 }
5462
5463 xpt_free_path(request_ccb->ccb_h.path);
5464
5465 /* Check Bounds */
5466 if ((lun_id == request_ccb->ccb_h.target_lun)
5467 || lun_id > scan_info->cpi->max_lun) {
5468 /* We're done */
5469
5470 xpt_free_ccb(request_ccb);
5471 scan_info->pending_count--;
5472 if (scan_info->pending_count == 0) {
5473 xpt_free_ccb((union ccb *)scan_info->cpi);
5474 request_ccb = scan_info->request_ccb;
5475 free(scan_info, M_TEMP);
5476 request_ccb->ccb_h.status = CAM_REQ_CMP;
5477 xpt_done(request_ccb);
5478 }
5479 } else {
5480 /* Try the next device */
5481 struct cam_path *path;
5482 cam_status status;
5483
5484 status = xpt_create_path(&path, xpt_periph,
5485 path_id, target_id, lun_id);
5486 if (status != CAM_REQ_CMP) {
5487 printf("xpt_scan_bus: xpt_create_path failed "
5488 "with status %#x, halting LUN scan\n",
5489 status);
5490 xpt_free_ccb(request_ccb);
5491 scan_info->pending_count--;
5492 if (scan_info->pending_count == 0) {
5493 xpt_free_ccb(
5494 (union ccb *)scan_info->cpi);
5495 request_ccb = scan_info->request_ccb;
5496 free(scan_info, M_TEMP);
5497 request_ccb->ccb_h.status = CAM_REQ_CMP;
5498 xpt_done(request_ccb);
5499 }
5500 break;
5501 }
5502 xpt_setup_ccb(&request_ccb->ccb_h, path,
5503 request_ccb->ccb_h.pinfo.priority);
5504 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5505 request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5506 request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5507 request_ccb->crcn.flags =
5508 scan_info->request_ccb->crcn.flags;
5509 xpt_action(request_ccb);
5510 }
5511 break;
5512 }
5513 default:
5514 break;
5515 }
5516 }
5517
5518 typedef enum {
5519 PROBE_TUR,
5520 PROBE_INQUIRY,
5521 PROBE_FULL_INQUIRY,
5522 PROBE_MODE_SENSE,
5523 PROBE_SERIAL_NUM,
5524 PROBE_TUR_FOR_NEGOTIATION
5525 } probe_action;
5526
5527 typedef enum {
5528 PROBE_INQUIRY_CKSUM = 0x01,
5529 PROBE_SERIAL_CKSUM = 0x02,
5530 PROBE_NO_ANNOUNCE = 0x04
5531 } probe_flags;
5532
5533 typedef struct {
5534 TAILQ_HEAD(, ccb_hdr) request_ccbs;
5535 probe_action action;
5536 union ccb saved_ccb;
5537 probe_flags flags;
5538 MD5_CTX context;
5539 u_int8_t digest[16];
5540 } probe_softc;
5541
5542 static void
5543 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5544 cam_flags flags, union ccb *request_ccb)
5545 {
5546 struct ccb_pathinq cpi;
5547 cam_status status;
5548 struct cam_path *new_path;
5549 struct cam_periph *old_periph;
5550 int s;
5551
5552 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5553 ("xpt_scan_lun\n"));
5554
5555 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5556 cpi.ccb_h.func_code = XPT_PATH_INQ;
5557 xpt_action((union ccb *)&cpi);
5558
5559 if (cpi.ccb_h.status != CAM_REQ_CMP) {
5560 if (request_ccb != NULL) {
5561 request_ccb->ccb_h.status = cpi.ccb_h.status;
5562 xpt_done(request_ccb);
5563 }
5564 return;
5565 }
5566
5567 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5568 /*
5569 * Can't scan the bus on an adapter that
5570 * cannot perform the initiator role.
5571 */
5572 if (request_ccb != NULL) {
5573 request_ccb->ccb_h.status = CAM_REQ_CMP;
5574 xpt_done(request_ccb);
5575 }
5576 return;
5577 }
5578
5579 if (request_ccb == NULL) {
5580 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_NOWAIT);
5581 if (request_ccb == NULL) {
5582 xpt_print_path(path);
5583 printf("xpt_scan_lun: can't allocate CCB, can't "
5584 "continue\n");
5585 return;
5586 }
5587 new_path = malloc(sizeof(*new_path), M_TEMP, M_NOWAIT);
5588 if (new_path == NULL) {
5589 xpt_print_path(path);
5590 printf("xpt_scan_lun: can't allocate path, can't "
5591 "continue\n");
5592 free(request_ccb, M_TEMP);
5593 return;
5594 }
5595 status = xpt_compile_path(new_path, xpt_periph,
5596 path->bus->path_id,
5597 path->target->target_id,
5598 path->device->lun_id);
5599
5600 if (status != CAM_REQ_CMP) {
5601 xpt_print_path(path);
5602 printf("xpt_scan_lun: can't compile path, can't "
5603 "continue\n");
5604 free(request_ccb, M_TEMP);
5605 free(new_path, M_TEMP);
5606 return;
5607 }
5608 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5609 request_ccb->ccb_h.cbfcnp = xptscandone;
5610 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5611 request_ccb->crcn.flags = flags;
5612 }
5613
5614 s = splsoftcam();
5615 if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5616 probe_softc *softc;
5617
5618 softc = (probe_softc *)old_periph->softc;
5619 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5620 periph_links.tqe);
5621 } else {
5622 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5623 probestart, "probe",
5624 CAM_PERIPH_BIO,
5625 request_ccb->ccb_h.path, NULL, 0,
5626 request_ccb);
5627
5628 if (status != CAM_REQ_CMP) {
5629 xpt_print_path(path);
5630 printf("xpt_scan_lun: cam_alloc_periph returned an "
5631 "error, can't continue probe\n");
5632 request_ccb->ccb_h.status = status;
5633 xpt_done(request_ccb);
5634 }
5635 }
5636 splx(s);
5637 }
5638
5639 static void
5640 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5641 {
5642 xpt_release_path(done_ccb->ccb_h.path);
5643 free(done_ccb->ccb_h.path, M_TEMP);
5644 free(done_ccb, M_TEMP);
5645 }
5646
5647 static cam_status
5648 proberegister(struct cam_periph *periph, void *arg)
5649 {
5650 union ccb *request_ccb; /* CCB representing the probe request */
5651 probe_softc *softc;
5652
5653 request_ccb = (union ccb *)arg;
5654 if (periph == NULL) {
5655 printf("proberegister: periph was NULL!!\n");
5656 return(CAM_REQ_CMP_ERR);
5657 }
5658
5659 if (request_ccb == NULL) {
5660 printf("proberegister: no probe CCB, "
5661 "can't register device\n");
5662 return(CAM_REQ_CMP_ERR);
5663 }
5664
5665 softc = (probe_softc *)malloc(sizeof(*softc), M_TEMP, M_NOWAIT);
5666
5667 if (softc == NULL) {
5668 printf("proberegister: Unable to probe new device. "
5669 "Unable to allocate softc\n");
5670 return(CAM_REQ_CMP_ERR);
5671 }
5672 TAILQ_INIT(&softc->request_ccbs);
5673 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5674 periph_links.tqe);
5675 softc->flags = 0;
5676 periph->softc = softc;
5677 cam_periph_acquire(periph);
5678 /*
5679 * Ensure we've waited at least a bus settle
5680 * delay before attempting to probe the device.
5681 * For HBAs that don't do bus resets, this won't make a difference.
5682 */
5683 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5684 scsi_delay);
5685 probeschedule(periph);
5686 return(CAM_REQ_CMP);
5687 }
5688
5689 static void
5690 probeschedule(struct cam_periph *periph)
5691 {
5692 struct ccb_pathinq cpi;
5693 union ccb *ccb;
5694 probe_softc *softc;
5695
5696 softc = (probe_softc *)periph->softc;
5697 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5698
5699 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5700 cpi.ccb_h.func_code = XPT_PATH_INQ;
5701 xpt_action((union ccb *)&cpi);
5702
5703 /*
5704 * If a device has gone away and another device, or the same one,
5705 * is back in the same place, it should have a unit attention
5706 * condition pending. It will not report the unit attention in
5707 * response to an inquiry, which may leave invalid transfer
5708 * negotiations in effect. The TUR will reveal the unit attention
5709 * condition. Only send the TUR for lun 0, since some devices
5710 * will get confused by commands other than inquiry to non-existent
5711 * luns. If you think a device has gone away start your scan from
5712 * lun 0. This will insure that any bogus transfer settings are
5713 * invalidated.
5714 *
5715 * If we haven't seen the device before and the controller supports
5716 * some kind of transfer negotiation, negotiate with the first
5717 * sent command if no bus reset was performed at startup. This
5718 * ensures that the device is not confused by transfer negotiation
5719 * settings left over by loader or BIOS action.
5720 */
5721 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5722 && (ccb->ccb_h.target_lun == 0)) {
5723 softc->action = PROBE_TUR;
5724 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5725 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5726 proberequestdefaultnegotiation(periph);
5727 softc->action = PROBE_INQUIRY;
5728 } else {
5729 softc->action = PROBE_INQUIRY;
5730 }
5731
5732 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5733 softc->flags |= PROBE_NO_ANNOUNCE;
5734 else
5735 softc->flags &= ~PROBE_NO_ANNOUNCE;
5736
5737 xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5738 }
5739
5740 static void
5741 probestart(struct cam_periph *periph, union ccb *start_ccb)
5742 {
5743 /* Probe the device that our peripheral driver points to */
5744 struct ccb_scsiio *csio;
5745 probe_softc *softc;
5746
5747 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5748
5749 softc = (probe_softc *)periph->softc;
5750 csio = &start_ccb->csio;
5751
5752 switch (softc->action) {
5753 case PROBE_TUR:
5754 case PROBE_TUR_FOR_NEGOTIATION:
5755 {
5756 scsi_test_unit_ready(csio,
5757 /*retries*/4,
5758 probedone,
5759 MSG_SIMPLE_Q_TAG,
5760 SSD_FULL_SIZE,
5761 /*timeout*/60000);
5762 break;
5763 }
5764 case PROBE_INQUIRY:
5765 case PROBE_FULL_INQUIRY:
5766 {
5767 u_int inquiry_len;
5768 struct scsi_inquiry_data *inq_buf;
5769
5770 inq_buf = &periph->path->device->inq_data;
5771 /*
5772 * If the device is currently configured, we calculate an
5773 * MD5 checksum of the inquiry data, and if the serial number
5774 * length is greater than 0, add the serial number data
5775 * into the checksum as well. Once the inquiry and the
5776 * serial number check finish, we attempt to figure out
5777 * whether we still have the same device.
5778 */
5779 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5780
5781 MD5Init(&softc->context);
5782 MD5Update(&softc->context, (unsigned char *)inq_buf,
5783 sizeof(struct scsi_inquiry_data));
5784 softc->flags |= PROBE_INQUIRY_CKSUM;
5785 if (periph->path->device->serial_num_len > 0) {
5786 MD5Update(&softc->context,
5787 periph->path->device->serial_num,
5788 periph->path->device->serial_num_len);
5789 softc->flags |= PROBE_SERIAL_CKSUM;
5790 }
5791 MD5Final(softc->digest, &softc->context);
5792 }
5793
5794 if (softc->action == PROBE_INQUIRY)
5795 inquiry_len = SHORT_INQUIRY_LENGTH;
5796 else
5797 inquiry_len = inq_buf->additional_length
5798 + offsetof(struct scsi_inquiry_data,
5799 additional_length) + 1;
5800
5801 /*
5802 * Some parallel SCSI devices fail to send an
5803 * ignore wide residue message when dealing with
5804 * odd length inquiry requests. Round up to be
5805 * safe.
5806 */
5807 inquiry_len = roundup2(inquiry_len, 2);
5808
5809 scsi_inquiry(csio,
5810 /*retries*/4,
5811 probedone,
5812 MSG_SIMPLE_Q_TAG,
5813 (u_int8_t *)inq_buf,
5814 inquiry_len,
5815 /*evpd*/FALSE,
5816 /*page_code*/0,
5817 SSD_MIN_SIZE,
5818 /*timeout*/60 * 1000);
5819 break;
5820 }
5821 case PROBE_MODE_SENSE:
5822 {
5823 void *mode_buf;
5824 int mode_buf_len;
5825
5826 mode_buf_len = sizeof(struct scsi_mode_header_6)
5827 + sizeof(struct scsi_mode_blk_desc)
5828 + sizeof(struct scsi_control_page);
5829 mode_buf = malloc(mode_buf_len, M_TEMP, M_NOWAIT);
5830 if (mode_buf != NULL) {
5831 scsi_mode_sense(csio,
5832 /*retries*/4,
5833 probedone,
5834 MSG_SIMPLE_Q_TAG,
5835 /*dbd*/FALSE,
5836 SMS_PAGE_CTRL_CURRENT,
5837 SMS_CONTROL_MODE_PAGE,
5838 mode_buf,
5839 mode_buf_len,
5840 SSD_FULL_SIZE,
5841 /*timeout*/60000);
5842 break;
5843 }
5844 xpt_print_path(periph->path);
5845 printf("Unable to mode sense control page - malloc failure\n");
5846 softc->action = PROBE_SERIAL_NUM;
5847 }
5848 /* FALLTHROUGH */
5849 case PROBE_SERIAL_NUM:
5850 {
5851 struct scsi_vpd_unit_serial_number *serial_buf;
5852 struct cam_ed* device;
5853
5854 serial_buf = NULL;
5855 device = periph->path->device;
5856 device->serial_num = NULL;
5857 device->serial_num_len = 0;
5858
5859 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0)
5860 serial_buf = (struct scsi_vpd_unit_serial_number *)
5861 malloc(sizeof(*serial_buf), M_TEMP,
5862 M_NOWAIT | M_ZERO);
5863
5864 if (serial_buf != NULL) {
5865 scsi_inquiry(csio,
5866 /*retries*/4,
5867 probedone,
5868 MSG_SIMPLE_Q_TAG,
5869 (u_int8_t *)serial_buf,
5870 sizeof(*serial_buf),
5871 /*evpd*/TRUE,
5872 SVPD_UNIT_SERIAL_NUMBER,
5873 SSD_MIN_SIZE,
5874 /*timeout*/60 * 1000);
5875 break;
5876 }
5877 /*
5878 * We'll have to do without, let our probedone
5879 * routine finish up for us.
5880 */
5881 start_ccb->csio.data_ptr = NULL;
5882 probedone(periph, start_ccb);
5883 return;
5884 }
5885 }
5886 xpt_action(start_ccb);
5887 }
5888
5889 static void
5890 proberequestdefaultnegotiation(struct cam_periph *periph)
5891 {
5892 struct ccb_trans_settings cts;
5893
5894 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5895 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5896 #ifdef CAM_NEW_TRAN_CODE
5897 cts.type = CTS_TYPE_USER_SETTINGS;
5898 #else /* CAM_NEW_TRAN_CODE */
5899 cts.flags = CCB_TRANS_USER_SETTINGS;
5900 #endif /* CAM_NEW_TRAN_CODE */
5901 xpt_action((union ccb *)&cts);
5902 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5903 #ifdef CAM_NEW_TRAN_CODE
5904 cts.type = CTS_TYPE_CURRENT_SETTINGS;
5905 #else /* CAM_NEW_TRAN_CODE */
5906 cts.flags &= ~CCB_TRANS_USER_SETTINGS;
5907 cts.flags |= CCB_TRANS_CURRENT_SETTINGS;
5908 #endif /* CAM_NEW_TRAN_CODE */
5909 xpt_action((union ccb *)&cts);
5910 }
5911
5912 static void
5913 probedone(struct cam_periph *periph, union ccb *done_ccb)
5914 {
5915 probe_softc *softc;
5916 struct cam_path *path;
5917 u_int32_t priority;
5918
5919 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
5920
5921 softc = (probe_softc *)periph->softc;
5922 path = done_ccb->ccb_h.path;
5923 priority = done_ccb->ccb_h.pinfo.priority;
5924
5925 switch (softc->action) {
5926 case PROBE_TUR:
5927 {
5928 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5929
5930 if (cam_periph_error(done_ccb, 0,
5931 SF_NO_PRINT, NULL) == ERESTART)
5932 return;
5933 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
5934 /* Don't wedge the queue */
5935 xpt_release_devq(done_ccb->ccb_h.path,
5936 /*count*/1,
5937 /*run_queue*/TRUE);
5938 }
5939 softc->action = PROBE_INQUIRY;
5940 xpt_release_ccb(done_ccb);
5941 xpt_schedule(periph, priority);
5942 return;
5943 }
5944 case PROBE_INQUIRY:
5945 case PROBE_FULL_INQUIRY:
5946 {
5947 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5948 struct scsi_inquiry_data *inq_buf;
5949 u_int8_t periph_qual;
5950
5951 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
5952 inq_buf = &path->device->inq_data;
5953
5954 periph_qual = SID_QUAL(inq_buf);
5955
5956 switch(periph_qual) {
5957 case SID_QUAL_LU_CONNECTED:
5958 {
5959 u_int8_t len;
5960
5961 /*
5962 * We conservatively request only
5963 * SHORT_INQUIRY_LEN bytes of inquiry
5964 * information during our first try
5965 * at sending an INQUIRY. If the device
5966 * has more information to give,
5967 * perform a second request specifying
5968 * the amount of information the device
5969 * is willing to give.
5970 */
5971 len = inq_buf->additional_length
5972 + offsetof(struct scsi_inquiry_data,
5973 additional_length) + 1;
5974 if (softc->action == PROBE_INQUIRY
5975 && len > SHORT_INQUIRY_LENGTH) {
5976 softc->action = PROBE_FULL_INQUIRY;
5977 xpt_release_ccb(done_ccb);
5978 xpt_schedule(periph, priority);
5979 return;
5980 }
5981
5982 xpt_find_quirk(path->device);
5983
5984 #ifdef CAM_NEW_TRAN_CODE
5985 xpt_devise_transport(path);
5986 #endif /* CAM_NEW_TRAN_CODE */
5987 if ((inq_buf->flags & SID_CmdQue) != 0)
5988 softc->action = PROBE_MODE_SENSE;
5989 else
5990 softc->action = PROBE_SERIAL_NUM;
5991
5992 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5993
5994 xpt_release_ccb(done_ccb);
5995 xpt_schedule(periph, priority);
5996 return;
5997 }
5998 default:
5999 break;
6000 }
6001 } else if (cam_periph_error(done_ccb, 0,
6002 done_ccb->ccb_h.target_lun > 0
6003 ? SF_RETRY_UA|SF_QUIET_IR
6004 : SF_RETRY_UA,
6005 &softc->saved_ccb) == ERESTART) {
6006 return;
6007 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6008 /* Don't wedge the queue */
6009 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6010 /*run_queue*/TRUE);
6011 }
6012 /*
6013 * If we get to this point, we got an error status back
6014 * from the inquiry and the error status doesn't require
6015 * automatically retrying the command. Therefore, the
6016 * inquiry failed. If we had inquiry information before
6017 * for this device, but this latest inquiry command failed,
6018 * the device has probably gone away. If this device isn't
6019 * already marked unconfigured, notify the peripheral
6020 * drivers that this device is no more.
6021 */
6022 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
6023 /* Send the async notification. */
6024 xpt_async(AC_LOST_DEVICE, path, NULL);
6025
6026 xpt_release_ccb(done_ccb);
6027 break;
6028 }
6029 case PROBE_MODE_SENSE:
6030 {
6031 struct ccb_scsiio *csio;
6032 struct scsi_mode_header_6 *mode_hdr;
6033
6034 csio = &done_ccb->csio;
6035 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
6036 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
6037 struct scsi_control_page *page;
6038 u_int8_t *offset;
6039
6040 offset = ((u_int8_t *)&mode_hdr[1])
6041 + mode_hdr->blk_desc_len;
6042 page = (struct scsi_control_page *)offset;
6043 path->device->queue_flags = page->queue_flags;
6044 } else if (cam_periph_error(done_ccb, 0,
6045 SF_RETRY_UA|SF_NO_PRINT,
6046 &softc->saved_ccb) == ERESTART) {
6047 return;
6048 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6049 /* Don't wedge the queue */
6050 xpt_release_devq(done_ccb->ccb_h.path,
6051 /*count*/1, /*run_queue*/TRUE);
6052 }
6053 xpt_release_ccb(done_ccb);
6054 free(mode_hdr, M_TEMP);
6055 softc->action = PROBE_SERIAL_NUM;
6056 xpt_schedule(periph, priority);
6057 return;
6058 }
6059 case PROBE_SERIAL_NUM:
6060 {
6061 struct ccb_scsiio *csio;
6062 struct scsi_vpd_unit_serial_number *serial_buf;
6063 u_int32_t priority;
6064 int changed;
6065 int have_serialnum;
6066
6067 changed = 1;
6068 have_serialnum = 0;
6069 csio = &done_ccb->csio;
6070 priority = done_ccb->ccb_h.pinfo.priority;
6071 serial_buf =
6072 (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
6073
6074 /* Clean up from previous instance of this device */
6075 if (path->device->serial_num != NULL) {
6076 free(path->device->serial_num, M_CAMXPT);
6077 path->device->serial_num = NULL;
6078 path->device->serial_num_len = 0;
6079 }
6080
6081 if (serial_buf == NULL) {
6082 /*
6083 * Don't process the command as it was never sent
6084 */
6085 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
6086 && (serial_buf->length > 0)) {
6087
6088 have_serialnum = 1;
6089 path->device->serial_num =
6090 (u_int8_t *)malloc((serial_buf->length + 1),
6091 M_CAMXPT, M_NOWAIT);
6092 if (path->device->serial_num != NULL) {
6093 bcopy(serial_buf->serial_num,
6094 path->device->serial_num,
6095 serial_buf->length);
6096 path->device->serial_num_len =
6097 serial_buf->length;
6098 path->device->serial_num[serial_buf->length]
6099 = '\0';
6100 }
6101 } else if (cam_periph_error(done_ccb, 0,
6102 SF_RETRY_UA|SF_NO_PRINT,
6103 &softc->saved_ccb) == ERESTART) {
6104 return;
6105 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6106 /* Don't wedge the queue */
6107 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6108 /*run_queue*/TRUE);
6109 }
6110
6111 /*
6112 * Let's see if we have seen this device before.
6113 */
6114 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
6115 MD5_CTX context;
6116 u_int8_t digest[16];
6117
6118 MD5Init(&context);
6119
6120 MD5Update(&context,
6121 (unsigned char *)&path->device->inq_data,
6122 sizeof(struct scsi_inquiry_data));
6123
6124 if (have_serialnum)
6125 MD5Update(&context, serial_buf->serial_num,
6126 serial_buf->length);
6127
6128 MD5Final(digest, &context);
6129 if (bcmp(softc->digest, digest, 16) == 0)
6130 changed = 0;
6131
6132 /*
6133 * XXX Do we need to do a TUR in order to ensure
6134 * that the device really hasn't changed???
6135 */
6136 if ((changed != 0)
6137 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
6138 xpt_async(AC_LOST_DEVICE, path, NULL);
6139 }
6140 if (serial_buf != NULL)
6141 free(serial_buf, M_TEMP);
6142
6143 if (changed != 0) {
6144 /*
6145 * Now that we have all the necessary
6146 * information to safely perform transfer
6147 * negotiations... Controllers don't perform
6148 * any negotiation or tagged queuing until
6149 * after the first XPT_SET_TRAN_SETTINGS ccb is
6150 * received. So, on a new device, just retreive
6151 * the user settings, and set them as the current
6152 * settings to set the device up.
6153 */
6154 proberequestdefaultnegotiation(periph);
6155 xpt_release_ccb(done_ccb);
6156
6157 /*
6158 * Perform a TUR to allow the controller to
6159 * perform any necessary transfer negotiation.
6160 */
6161 softc->action = PROBE_TUR_FOR_NEGOTIATION;
6162 xpt_schedule(periph, priority);
6163 return;
6164 }
6165 xpt_release_ccb(done_ccb);
6166 break;
6167 }
6168 case PROBE_TUR_FOR_NEGOTIATION:
6169 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6170 /* Don't wedge the queue */
6171 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6172 /*run_queue*/TRUE);
6173 }
6174
6175 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
6176
6177 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
6178 /* Inform the XPT that a new device has been found */
6179 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
6180 xpt_action(done_ccb);
6181
6182 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
6183 done_ccb);
6184 }
6185 xpt_release_ccb(done_ccb);
6186 break;
6187 }
6188 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
6189 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
6190 done_ccb->ccb_h.status = CAM_REQ_CMP;
6191 xpt_done(done_ccb);
6192 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
6193 cam_periph_invalidate(periph);
6194 cam_periph_release(periph);
6195 } else {
6196 probeschedule(periph);
6197 }
6198 }
6199
6200 static void
6201 probecleanup(struct cam_periph *periph)
6202 {
6203 free(periph->softc, M_TEMP);
6204 }
6205
6206 static void
6207 xpt_find_quirk(struct cam_ed *device)
6208 {
6209 caddr_t match;
6210
6211 match = cam_quirkmatch((caddr_t)&device->inq_data,
6212 (caddr_t)xpt_quirk_table,
6213 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
6214 sizeof(*xpt_quirk_table), scsi_inquiry_match);
6215
6216 if (match == NULL)
6217 panic("xpt_find_quirk: device didn't match wildcard entry!!");
6218
6219 device->quirk = (struct xpt_quirk_entry *)match;
6220 }
6221
6222 static int
6223 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS)
6224 {
6225 int error, bool;
6226
6227 bool = cam_srch_hi;
6228 error = sysctl_handle_int(oidp, &bool, sizeof(bool), req);
6229 if (error != 0 || req->newptr == NULL)
6230 return (error);
6231 if (bool == 0 || bool == 1) {
6232 cam_srch_hi = bool;
6233 return (0);
6234 } else {
6235 return (EINVAL);
6236 }
6237 }
6238
6239 #ifdef CAM_NEW_TRAN_CODE
6240
6241 static void
6242 xpt_devise_transport(struct cam_path *path)
6243 {
6244 struct ccb_pathinq cpi;
6245 struct ccb_trans_settings cts;
6246 struct scsi_inquiry_data *inq_buf;
6247
6248 /* Get transport information from the SIM */
6249 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
6250 cpi.ccb_h.func_code = XPT_PATH_INQ;
6251 xpt_action((union ccb *)&cpi);
6252
6253 inq_buf = NULL;
6254 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0)
6255 inq_buf = &path->device->inq_data;
6256 path->device->protocol = PROTO_SCSI;
6257 path->device->protocol_version =
6258 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version;
6259 path->device->transport = cpi.transport;
6260 path->device->transport_version = cpi.transport_version;
6261
6262 /*
6263 * Any device not using SPI3 features should
6264 * be considered SPI2 or lower.
6265 */
6266 if (inq_buf != NULL) {
6267 if (path->device->transport == XPORT_SPI
6268 && (inq_buf->spi3data & SID_SPI_MASK) == 0
6269 && path->device->transport_version > 2)
6270 path->device->transport_version = 2;
6271 } else {
6272 struct cam_ed* otherdev;
6273
6274 for (otherdev = TAILQ_FIRST(&path->target->ed_entries);
6275 otherdev != NULL;
6276 otherdev = TAILQ_NEXT(otherdev, links)) {
6277 if (otherdev != path->device)
6278 break;
6279 }
6280
6281 if (otherdev != NULL) {
6282 /*
6283 * Initially assume the same versioning as
6284 * prior luns for this target.
6285 */
6286 path->device->protocol_version =
6287 otherdev->protocol_version;
6288 path->device->transport_version =
6289 otherdev->transport_version;
6290 } else {
6291 /* Until we know better, opt for safty */
6292 path->device->protocol_version = 2;
6293 if (path->device->transport == XPORT_SPI)
6294 path->device->transport_version = 2;
6295 else
6296 path->device->transport_version = 0;
6297 }
6298 }
6299
6300 /*
6301 * XXX
6302 * For a device compliant with SPC-2 we should be able
6303 * to determine the transport version supported by
6304 * scrutinizing the version descriptors in the
6305 * inquiry buffer.
6306 */
6307
6308 /* Tell the controller what we think */
6309 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
6310 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
6311 cts.type = CTS_TYPE_CURRENT_SETTINGS;
6312 cts.transport = path->device->transport;
6313 cts.transport_version = path->device->transport_version;
6314 cts.protocol = path->device->protocol;
6315 cts.protocol_version = path->device->protocol_version;
6316 cts.proto_specific.valid = 0;
6317 cts.xport_specific.valid = 0;
6318 xpt_action((union ccb *)&cts);
6319 }
6320
6321 static void
6322 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
6323 int async_update)
6324 {
6325 struct ccb_pathinq cpi;
6326 struct ccb_trans_settings cur_cts;
6327 struct ccb_trans_settings_scsi *scsi;
6328 struct ccb_trans_settings_scsi *cur_scsi;
6329 struct cam_sim *sim;
6330 struct scsi_inquiry_data *inq_data;
6331
6332 if (device == NULL) {
6333 cts->ccb_h.status = CAM_PATH_INVALID;
6334 xpt_done((union ccb *)cts);
6335 return;
6336 }
6337
6338 if (cts->protocol == PROTO_UNKNOWN
6339 || cts->protocol == PROTO_UNSPECIFIED) {
6340 cts->protocol = device->protocol;
6341 cts->protocol_version = device->protocol_version;
6342 }
6343
6344 if (cts->protocol_version == PROTO_VERSION_UNKNOWN
6345 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED)
6346 cts->protocol_version = device->protocol_version;
6347
6348 if (cts->protocol != device->protocol) {
6349 xpt_print_path(cts->ccb_h.path);
6350 printf("Uninitialized Protocol %x:%x?\n",
6351 cts->protocol, device->protocol);
6352 cts->protocol = device->protocol;
6353 }
6354
6355 if (cts->protocol_version > device->protocol_version) {
6356 if (bootverbose) {
6357 xpt_print_path(cts->ccb_h.path);
6358 printf("Down reving Protocol Version from %d to %d?\n",
6359 cts->protocol_version, device->protocol_version);
6360 }
6361 cts->protocol_version = device->protocol_version;
6362 }
6363
6364 if (cts->transport == XPORT_UNKNOWN
6365 || cts->transport == XPORT_UNSPECIFIED) {
6366 cts->transport = device->transport;
6367 cts->transport_version = device->transport_version;
6368 }
6369
6370 if (cts->transport_version == XPORT_VERSION_UNKNOWN
6371 || cts->transport_version == XPORT_VERSION_UNSPECIFIED)
6372 cts->transport_version = device->transport_version;
6373
6374 if (cts->transport != device->transport) {
6375 xpt_print_path(cts->ccb_h.path);
6376 printf("Uninitialized Transport %x:%x?\n",
6377 cts->transport, device->transport);
6378 cts->transport = device->transport;
6379 }
6380
6381 if (cts->transport_version > device->transport_version) {
6382 if (bootverbose) {
6383 xpt_print_path(cts->ccb_h.path);
6384 printf("Down reving Transport Version from %d to %d?\n",
6385 cts->transport_version,
6386 device->transport_version);
6387 }
6388 cts->transport_version = device->transport_version;
6389 }
6390
6391 sim = cts->ccb_h.path->bus->sim;
6392
6393 /*
6394 * Nothing more of interest to do unless
6395 * this is a device connected via the
6396 * SCSI protocol.
6397 */
6398 if (cts->protocol != PROTO_SCSI) {
6399 if (async_update == FALSE)
6400 (*(sim->sim_action))(sim, (union ccb *)cts);
6401 return;
6402 }
6403
6404 inq_data = &device->inq_data;
6405 scsi = &cts->proto_specific.scsi;
6406 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
6407 cpi.ccb_h.func_code = XPT_PATH_INQ;
6408 xpt_action((union ccb *)&cpi);
6409
6410 /* SCSI specific sanity checking */
6411 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
6412 || (inq_data->flags & SID_CmdQue) == 0
6413 || (device->queue_flags & SCP_QUEUE_DQUE) != 0
6414 || (device->quirk->mintags == 0)) {
6415 /*
6416 * Can't tag on hardware that doesn't support tags,
6417 * doesn't have it enabled, or has broken tag support.
6418 */
6419 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6420 }
6421
6422 if (async_update == FALSE) {
6423 /*
6424 * Perform sanity checking against what the
6425 * controller and device can do.
6426 */
6427 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
6428 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
6429 cur_cts.type = cts->type;
6430 xpt_action((union ccb *)&cur_cts);
6431
6432 cur_scsi = &cur_cts.proto_specific.scsi;
6433 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) {
6434 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6435 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB;
6436 }
6437 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0)
6438 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6439 }
6440
6441 /* SPI specific sanity checking */
6442 if (cts->transport == XPORT_SPI && async_update == FALSE) {
6443 u_int spi3caps;
6444 struct ccb_trans_settings_spi *spi;
6445 struct ccb_trans_settings_spi *cur_spi;
6446
6447 spi = &cts->xport_specific.spi;
6448
6449 cur_spi = &cur_cts.xport_specific.spi;
6450
6451 /* Fill in any gaps in what the user gave us */
6452 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6453 spi->sync_period = cur_spi->sync_period;
6454 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6455 spi->sync_period = 0;
6456 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6457 spi->sync_offset = cur_spi->sync_offset;
6458 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6459 spi->sync_offset = 0;
6460 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6461 spi->ppr_options = cur_spi->ppr_options;
6462 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6463 spi->ppr_options = 0;
6464 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6465 spi->bus_width = cur_spi->bus_width;
6466 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6467 spi->bus_width = 0;
6468 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) {
6469 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6470 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB;
6471 }
6472 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0)
6473 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6474 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6475 && (inq_data->flags & SID_Sync) == 0
6476 && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6477 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
6478 || (cur_spi->sync_offset == 0)
6479 || (cur_spi->sync_period == 0)) {
6480 /* Force async */
6481 spi->sync_period = 0;
6482 spi->sync_offset = 0;
6483 }
6484
6485 switch (spi->bus_width) {
6486 case MSG_EXT_WDTR_BUS_32_BIT:
6487 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6488 || (inq_data->flags & SID_WBus32) != 0
6489 || cts->type == CTS_TYPE_USER_SETTINGS)
6490 && (cpi.hba_inquiry & PI_WIDE_32) != 0)
6491 break;
6492 /* Fall Through to 16-bit */
6493 case MSG_EXT_WDTR_BUS_16_BIT:
6494 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6495 || (inq_data->flags & SID_WBus16) != 0
6496 || cts->type == CTS_TYPE_USER_SETTINGS)
6497 && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
6498 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
6499 break;
6500 }
6501 /* Fall Through to 8-bit */
6502 default: /* New bus width?? */
6503 case MSG_EXT_WDTR_BUS_8_BIT:
6504 /* All targets can do this */
6505 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
6506 break;
6507 }
6508
6509 spi3caps = cpi.xport_specific.spi.ppr_options;
6510 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6511 && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6512 spi3caps &= inq_data->spi3data;
6513
6514 if ((spi3caps & SID_SPI_CLOCK_DT) == 0)
6515 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;
6516
6517 if ((spi3caps & SID_SPI_IUS) == 0)
6518 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;
6519
6520 if ((spi3caps & SID_SPI_QAS) == 0)
6521 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
6522
6523 /* No SPI Transfer settings are allowed unless we are wide */
6524 if (spi->bus_width == 0)
6525 spi->ppr_options = 0;
6526
6527 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) {
6528 /*
6529 * Can't tag queue without disconnection.
6530 */
6531 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6532 scsi->valid |= CTS_SCSI_VALID_TQ;
6533 }
6534
6535 /*
6536 * If we are currently performing tagged transactions to
6537 * this device and want to change its negotiation parameters,
6538 * go non-tagged for a bit to give the controller a chance to
6539 * negotiate unhampered by tag messages.
6540 */
6541 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6542 && (device->inq_flags & SID_CmdQue) != 0
6543 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6544 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE|
6545 CTS_SPI_VALID_SYNC_OFFSET|
6546 CTS_SPI_VALID_BUS_WIDTH)) != 0)
6547 xpt_toggle_tags(cts->ccb_h.path);
6548 }
6549
6550 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6551 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
6552 int device_tagenb;
6553
6554 /*
6555 * If we are transitioning from tags to no-tags or
6556 * vice-versa, we need to carefully freeze and restart
6557 * the queue so that we don't overlap tagged and non-tagged
6558 * commands. We also temporarily stop tags if there is
6559 * a change in transfer negotiation settings to allow
6560 * "tag-less" negotiation.
6561 */
6562 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6563 || (device->inq_flags & SID_CmdQue) != 0)
6564 device_tagenb = TRUE;
6565 else
6566 device_tagenb = FALSE;
6567
6568 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6569 && device_tagenb == FALSE)
6570 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0
6571 && device_tagenb == TRUE)) {
6572
6573 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
6574 /*
6575 * Delay change to use tags until after a
6576 * few commands have gone to this device so
6577 * the controller has time to perform transfer
6578 * negotiations without tagged messages getting
6579 * in the way.
6580 */
6581 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
6582 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
6583 } else {
6584 struct cc |