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("$FreeBSD$");
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 #include <sys/taskqueue.h>
46
47 #include <sys/lock.h>
48 #include <sys/mutex.h>
49 #include <sys/sysctl.h>
50 #include <sys/kthread.h>
51
52 #ifdef PC98
53 #include <pc98/pc98/pc98_machdep.h> /* geometry translation */
54 #endif
55
56 #include <cam/cam.h>
57 #include <cam/cam_ccb.h>
58 #include <cam/cam_periph.h>
59 #include <cam/cam_sim.h>
60 #include <cam/cam_xpt.h>
61 #include <cam/cam_xpt_sim.h>
62 #include <cam/cam_xpt_periph.h>
63 #include <cam/cam_debug.h>
64
65 #include <cam/scsi/scsi_all.h>
66 #include <cam/scsi/scsi_message.h>
67 #include <cam/scsi/scsi_pass.h>
68 #include <machine/stdarg.h> /* for xpt_print below */
69 #include "opt_cam.h"
70
71 /* Datastructures internal to the xpt layer */
72 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
73
74 /* Object for defering XPT actions to a taskqueue */
75 struct xpt_task {
76 struct task task;
77 void *data1;
78 uintptr_t data2;
79 };
80
81 /*
82 * Definition of an async handler callback block. These are used to add
83 * SIMs and peripherals to the async callback lists.
84 */
85 struct async_node {
86 SLIST_ENTRY(async_node) links;
87 u_int32_t event_enable; /* Async Event enables */
88 void (*callback)(void *arg, u_int32_t code,
89 struct cam_path *path, void *args);
90 void *callback_arg;
91 };
92
93 SLIST_HEAD(async_list, async_node);
94 SLIST_HEAD(periph_list, cam_periph);
95
96 /*
97 * This is the maximum number of high powered commands (e.g. start unit)
98 * that can be outstanding at a particular time.
99 */
100 #ifndef CAM_MAX_HIGHPOWER
101 #define CAM_MAX_HIGHPOWER 4
102 #endif
103
104 /*
105 * Structure for queueing a device in a run queue.
106 * There is one run queue for allocating new ccbs,
107 * and another for sending ccbs to the controller.
108 */
109 struct cam_ed_qinfo {
110 cam_pinfo pinfo;
111 struct cam_ed *device;
112 };
113
114 /*
115 * The CAM EDT (Existing Device Table) contains the device information for
116 * all devices for all busses in the system. The table contains a
117 * cam_ed structure for each device on the bus.
118 */
119 struct cam_ed {
120 TAILQ_ENTRY(cam_ed) links;
121 struct cam_ed_qinfo alloc_ccb_entry;
122 struct cam_ed_qinfo send_ccb_entry;
123 struct cam_et *target;
124 struct cam_sim *sim;
125 lun_id_t lun_id;
126 struct camq drvq; /*
127 * Queue of type drivers wanting to do
128 * work on this device.
129 */
130 struct cam_ccbq ccbq; /* Queue of pending ccbs */
131 struct async_list asyncs; /* Async callback info for this B/T/L */
132 struct periph_list periphs; /* All attached devices */
133 u_int generation; /* Generation number */
134 struct cam_periph *owner; /* Peripheral driver's ownership tag */
135 struct xpt_quirk_entry *quirk; /* Oddities about this device */
136 /* Storage for the inquiry data */
137 cam_proto protocol;
138 u_int protocol_version;
139 cam_xport transport;
140 u_int transport_version;
141 struct scsi_inquiry_data inq_data;
142 u_int8_t inq_flags; /*
143 * Current settings for inquiry flags.
144 * This allows us to override settings
145 * like disconnection and tagged
146 * queuing for a device.
147 */
148 u_int8_t queue_flags; /* Queue flags from the control page */
149 u_int8_t serial_num_len;
150 u_int8_t *serial_num;
151 u_int32_t qfrozen_cnt;
152 u_int32_t flags;
153 #define CAM_DEV_UNCONFIGURED 0x01
154 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02
155 #define CAM_DEV_REL_ON_COMPLETE 0x04
156 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08
157 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10
158 #define CAM_DEV_TAG_AFTER_COUNT 0x20
159 #define CAM_DEV_INQUIRY_DATA_VALID 0x40
160 #define CAM_DEV_IN_DV 0x80
161 #define CAM_DEV_DV_HIT_BOTTOM 0x100
162 u_int32_t tag_delay_count;
163 #define CAM_TAG_DELAY_COUNT 5
164 u_int32_t tag_saved_openings;
165 u_int32_t refcount;
166 struct callout callout;
167 };
168
169 /*
170 * Each target is represented by an ET (Existing Target). These
171 * entries are created when a target is successfully probed with an
172 * identify, and removed when a device fails to respond after a number
173 * of retries, or a bus rescan finds the device missing.
174 */
175 struct cam_et {
176 TAILQ_HEAD(, cam_ed) ed_entries;
177 TAILQ_ENTRY(cam_et) links;
178 struct cam_eb *bus;
179 target_id_t target_id;
180 u_int32_t refcount;
181 u_int generation;
182 struct timeval last_reset;
183 };
184
185 /*
186 * Each bus is represented by an EB (Existing Bus). These entries
187 * are created by calls to xpt_bus_register and deleted by calls to
188 * xpt_bus_deregister.
189 */
190 struct cam_eb {
191 TAILQ_HEAD(, cam_et) et_entries;
192 TAILQ_ENTRY(cam_eb) links;
193 path_id_t path_id;
194 struct cam_sim *sim;
195 struct timeval last_reset;
196 u_int32_t flags;
197 #define CAM_EB_RUNQ_SCHEDULED 0x01
198 u_int32_t refcount;
199 u_int generation;
200 device_t parent_dev;
201 };
202
203 struct cam_path {
204 struct cam_periph *periph;
205 struct cam_eb *bus;
206 struct cam_et *target;
207 struct cam_ed *device;
208 };
209
210 struct xpt_quirk_entry {
211 struct scsi_inquiry_pattern inq_pat;
212 u_int8_t quirks;
213 #define CAM_QUIRK_NOLUNS 0x01
214 #define CAM_QUIRK_NOSERIAL 0x02
215 #define CAM_QUIRK_HILUNS 0x04
216 #define CAM_QUIRK_NOHILUNS 0x08
217 u_int mintags;
218 u_int maxtags;
219 };
220
221 static int cam_srch_hi = 0;
222 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi);
223 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS);
224 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0,
225 sysctl_cam_search_luns, "I",
226 "allow search above LUN 7 for SCSI3 and greater devices");
227
228 #define CAM_SCSI2_MAXLUN 8
229 /*
230 * If we're not quirked to search <= the first 8 luns
231 * and we are either quirked to search above lun 8,
232 * or we're > SCSI-2 and we've enabled hilun searching,
233 * or we're > SCSI-2 and the last lun was a success,
234 * we can look for luns above lun 8.
235 */
236 #define CAN_SRCH_HI_SPARSE(dv) \
237 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \
238 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \
239 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi)))
240
241 #define CAN_SRCH_HI_DENSE(dv) \
242 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \
243 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \
244 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2)))
245
246 typedef enum {
247 XPT_FLAG_OPEN = 0x01
248 } xpt_flags;
249
250 struct xpt_softc {
251 xpt_flags flags;
252 u_int32_t xpt_generation;
253
254 /* number of high powered commands that can go through right now */
255 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
256 int num_highpower;
257
258 /* queue for handling async rescan requests. */
259 TAILQ_HEAD(, ccb_hdr) ccb_scanq;
260
261 /* Registered busses */
262 TAILQ_HEAD(,cam_eb) xpt_busses;
263 u_int bus_generation;
264
265 struct intr_config_hook *xpt_config_hook;
266
267 struct mtx xpt_topo_lock;
268 struct mtx xpt_lock;
269 };
270
271 static const char quantum[] = "QUANTUM";
272 static const char sony[] = "SONY";
273 static const char west_digital[] = "WDIGTL";
274 static const char samsung[] = "SAMSUNG";
275 static const char seagate[] = "SEAGATE";
276 static const char microp[] = "MICROP";
277
278 static struct xpt_quirk_entry xpt_quirk_table[] =
279 {
280 {
281 /* Reports QUEUE FULL for temporary resource shortages */
282 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
283 /*quirks*/0, /*mintags*/24, /*maxtags*/32
284 },
285 {
286 /* Reports QUEUE FULL for temporary resource shortages */
287 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
288 /*quirks*/0, /*mintags*/24, /*maxtags*/32
289 },
290 {
291 /* Reports QUEUE FULL for temporary resource shortages */
292 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
293 /*quirks*/0, /*mintags*/24, /*maxtags*/32
294 },
295 {
296 /* Broken tagged queuing drive */
297 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
298 /*quirks*/0, /*mintags*/0, /*maxtags*/
299 },
300 {
301 /* Broken tagged queuing drive */
302 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
303 /*quirks*/0, /*mintags*/0, /*maxtags*/
304 },
305 {
306 /* Broken tagged queuing drive */
307 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
308 /*quirks*/0, /*mintags*/0, /*maxtags*/
309 },
310 {
311 /*
312 * Unfortunately, the Quantum Atlas III has the same
313 * problem as the Atlas II drives above.
314 * Reported by: "Johan Granlund" <johan@granlund.nu>
315 *
316 * For future reference, the drive with the problem was:
317 * QUANTUM QM39100TD-SW N1B0
318 *
319 * It's possible that Quantum will fix the problem in later
320 * firmware revisions. If that happens, the quirk entry
321 * will need to be made specific to the firmware revisions
322 * with the problem.
323 *
324 */
325 /* Reports QUEUE FULL for temporary resource shortages */
326 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
327 /*quirks*/0, /*mintags*/24, /*maxtags*/32
328 },
329 {
330 /*
331 * 18 Gig Atlas III, same problem as the 9G version.
332 * Reported by: Andre Albsmeier
333 * <andre.albsmeier@mchp.siemens.de>
334 *
335 * For future reference, the drive with the problem was:
336 * QUANTUM QM318000TD-S N491
337 */
338 /* Reports QUEUE FULL for temporary resource shortages */
339 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
340 /*quirks*/0, /*mintags*/24, /*maxtags*/32
341 },
342 {
343 /*
344 * Broken tagged queuing drive
345 * Reported by: Bret Ford <bford@uop.cs.uop.edu>
346 * and: Martin Renters <martin@tdc.on.ca>
347 */
348 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
349 /*quirks*/0, /*mintags*/0, /*maxtags*/
350 },
351 /*
352 * The Seagate Medalist Pro drives have very poor write
353 * performance with anything more than 2 tags.
354 *
355 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl>
356 * Drive: <SEAGATE ST36530N 1444>
357 *
358 * Reported by: Jeremy Lea <reg@shale.csir.co.za>
359 * Drive: <SEAGATE ST34520W 1281>
360 *
361 * No one has actually reported that the 9G version
362 * (ST39140*) of the Medalist Pro has the same problem, but
363 * we're assuming that it does because the 4G and 6.5G
364 * versions of the drive are broken.
365 */
366 {
367 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
368 /*quirks*/0, /*mintags*/2, /*maxtags*/2
369 },
370 {
371 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
372 /*quirks*/0, /*mintags*/2, /*maxtags*/2
373 },
374 {
375 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
376 /*quirks*/0, /*mintags*/2, /*maxtags*/2
377 },
378 {
379 /*
380 * Slow when tagged queueing is enabled. Write performance
381 * steadily drops off with more and more concurrent
382 * transactions. Best sequential write performance with
383 * tagged queueing turned off and write caching turned on.
384 *
385 * PR: kern/10398
386 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp>
387 * Drive: DCAS-34330 w/ "S65A" firmware.
388 *
389 * The drive with the problem had the "S65A" firmware
390 * revision, and has also been reported (by Stephen J.
391 * Roznowski <sjr@home.net>) for a drive with the "S61A"
392 * firmware revision.
393 *
394 * Although no one has reported problems with the 2 gig
395 * version of the DCAS drive, the assumption is that it
396 * has the same problems as the 4 gig version. Therefore
397 * this quirk entries disables tagged queueing for all
398 * DCAS drives.
399 */
400 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
401 /*quirks*/0, /*mintags*/0, /*maxtags*/
402 },
403 {
404 /* Broken tagged queuing drive */
405 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
406 /*quirks*/0, /*mintags*/0, /*maxtags*/
407 },
408 {
409 /* Broken tagged queuing drive */
410 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
411 /*quirks*/0, /*mintags*/0, /*maxtags*/
412 },
413 {
414 /* This does not support other than LUN 0 */
415 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" },
416 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
417 },
418 {
419 /*
420 * Broken tagged queuing drive.
421 * Submitted by:
422 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
423 * in PR kern/9535
424 */
425 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
426 /*quirks*/0, /*mintags*/0, /*maxtags*/
427 },
428 {
429 /*
430 * Slow when tagged queueing is enabled. (1.5MB/sec versus
431 * 8MB/sec.)
432 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
433 * Best performance with these drives is achieved with
434 * tagged queueing turned off, and write caching turned on.
435 */
436 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
437 /*quirks*/0, /*mintags*/0, /*maxtags*/
438 },
439 {
440 /*
441 * Slow when tagged queueing is enabled. (1.5MB/sec versus
442 * 8MB/sec.)
443 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
444 * Best performance with these drives is achieved with
445 * tagged queueing turned off, and write caching turned on.
446 */
447 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
448 /*quirks*/0, /*mintags*/0, /*maxtags*/
449 },
450 {
451 /*
452 * Doesn't handle queue full condition correctly,
453 * so we need to limit maxtags to what the device
454 * can handle instead of determining this automatically.
455 */
456 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
457 /*quirks*/0, /*mintags*/2, /*maxtags*/32
458 },
459 {
460 /* Really only one LUN */
461 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
462 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
463 },
464 {
465 /* I can't believe we need a quirk for DPT volumes. */
466 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
467 CAM_QUIRK_NOLUNS,
468 /*mintags*/0, /*maxtags*/255
469 },
470 {
471 /*
472 * Many Sony CDROM drives don't like multi-LUN probing.
473 */
474 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
475 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
476 },
477 {
478 /*
479 * This drive doesn't like multiple LUN probing.
480 * Submitted by: Parag Patel <parag@cgt.com>
481 */
482 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" },
483 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
484 },
485 {
486 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
487 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
488 },
489 {
490 /*
491 * The 8200 doesn't like multi-lun probing, and probably
492 * don't like serial number requests either.
493 */
494 {
495 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
496 "EXB-8200*", "*"
497 },
498 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
499 },
500 {
501 /*
502 * Let's try the same as above, but for a drive that says
503 * it's an IPL-6860 but is actually an EXB 8200.
504 */
505 {
506 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
507 "IPL-6860*", "*"
508 },
509 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
510 },
511 {
512 /*
513 * These Hitachi drives don't like multi-lun probing.
514 * The PR submitter has a DK319H, but says that the Linux
515 * kernel has a similar work-around for the DK312 and DK314,
516 * so all DK31* drives are quirked here.
517 * PR: misc/18793
518 * Submitted by: Paul Haddad <paul@pth.com>
519 */
520 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
521 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
522 },
523 {
524 /*
525 * The Hitachi CJ series with J8A8 firmware apparantly has
526 * problems with tagged commands.
527 * PR: 23536
528 * Reported by: amagai@nue.org
529 */
530 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" },
531 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
532 },
533 {
534 /*
535 * These are the large storage arrays.
536 * Submitted by: William Carrel <william.carrel@infospace.com>
537 */
538 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" },
539 CAM_QUIRK_HILUNS, 2, 1024
540 },
541 {
542 /*
543 * This old revision of the TDC3600 is also SCSI-1, and
544 * hangs upon serial number probing.
545 */
546 {
547 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
548 " TDC 3600", "U07:"
549 },
550 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/
551 },
552 {
553 /*
554 * Would repond to all LUNs if asked for.
555 */
556 {
557 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
558 "CP150", "*"
559 },
560 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
561 },
562 {
563 /*
564 * Would repond to all LUNs if asked for.
565 */
566 {
567 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
568 "96X2*", "*"
569 },
570 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
571 },
572 {
573 /* Submitted by: Matthew Dodd <winter@jurai.net> */
574 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
575 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
576 },
577 {
578 /* Submitted by: Matthew Dodd <winter@jurai.net> */
579 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
580 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
581 },
582 {
583 /* TeraSolutions special settings for TRC-22 RAID */
584 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
585 /*quirks*/0, /*mintags*/55, /*maxtags*/255
586 },
587 {
588 /* Veritas Storage Appliance */
589 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
590 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
591 },
592 {
593 /*
594 * Would respond to all LUNs. Device type and removable
595 * flag are jumper-selectable.
596 */
597 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
598 "Tahiti 1", "*"
599 },
600 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
601 },
602 {
603 /* EasyRAID E5A aka. areca ARC-6010 */
604 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" },
605 CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255
606 },
607 {
608 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" },
609 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/
610 },
611 {
612 /* Default tagged queuing parameters for all devices */
613 {
614 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
615 /*vendor*/"*", /*product*/"*", /*revision*/"*"
616 },
617 /*quirks*/0, /*mintags*/2, /*maxtags*/255
618 },
619 };
620
621 static const int xpt_quirk_table_size =
622 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
623
624 typedef enum {
625 DM_RET_COPY = 0x01,
626 DM_RET_FLAG_MASK = 0x0f,
627 DM_RET_NONE = 0x00,
628 DM_RET_STOP = 0x10,
629 DM_RET_DESCEND = 0x20,
630 DM_RET_ERROR = 0x30,
631 DM_RET_ACTION_MASK = 0xf0
632 } dev_match_ret;
633
634 typedef enum {
635 XPT_DEPTH_BUS,
636 XPT_DEPTH_TARGET,
637 XPT_DEPTH_DEVICE,
638 XPT_DEPTH_PERIPH
639 } xpt_traverse_depth;
640
641 struct xpt_traverse_config {
642 xpt_traverse_depth depth;
643 void *tr_func;
644 void *tr_arg;
645 };
646
647 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
648 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
649 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
650 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
651 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
652
653 /* Transport layer configuration information */
654 static struct xpt_softc xsoftc;
655
656 /* Queues for our software interrupt handler */
657 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
658 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t;
659 static cam_simq_t cam_simq;
660 static struct mtx cam_simq_lock;
661
662 /* Pointers to software interrupt handlers */
663 static void *cambio_ih;
664
665 struct cam_periph *xpt_periph;
666
667 static periph_init_t xpt_periph_init;
668
669 static periph_init_t probe_periph_init;
670
671 static struct periph_driver xpt_driver =
672 {
673 xpt_periph_init, "xpt",
674 TAILQ_HEAD_INITIALIZER(xpt_driver.units)
675 };
676
677 static struct periph_driver probe_driver =
678 {
679 probe_periph_init, "probe",
680 TAILQ_HEAD_INITIALIZER(probe_driver.units)
681 };
682
683 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
684 PERIPHDRIVER_DECLARE(probe, probe_driver);
685
686
687 static d_open_t xptopen;
688 static d_close_t xptclose;
689 static d_ioctl_t xptioctl;
690
691 static struct cdevsw xpt_cdevsw = {
692 .d_version = D_VERSION,
693 .d_flags = 0,
694 .d_open = xptopen,
695 .d_close = xptclose,
696 .d_ioctl = xptioctl,
697 .d_name = "xpt",
698 };
699
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 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
709 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
710 #endif
711
712 /*
713 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
714 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS,
715 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
716 */
717 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
718 || defined(CAM_DEBUG_LUN)
719 #ifdef CAMDEBUG
720 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
721 || !defined(CAM_DEBUG_LUN)
722 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
723 and CAM_DEBUG_LUN"
724 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
725 #else /* !CAMDEBUG */
726 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
727 #endif /* CAMDEBUG */
728 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
729
730 /* Our boot-time initialization hook */
731 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
732
733 static moduledata_t cam_moduledata = {
734 "cam",
735 cam_module_event_handler,
736 NULL
737 };
738
739 static int xpt_init(void *);
740
741 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
742 MODULE_VERSION(cam, 1);
743
744
745 static cam_status xpt_compile_path(struct cam_path *new_path,
746 struct cam_periph *perph,
747 path_id_t path_id,
748 target_id_t target_id,
749 lun_id_t lun_id);
750
751 static void xpt_release_path(struct cam_path *path);
752
753 static void xpt_async_bcast(struct async_list *async_head,
754 u_int32_t async_code,
755 struct cam_path *path,
756 void *async_arg);
757 static void xpt_dev_async(u_int32_t async_code,
758 struct cam_eb *bus,
759 struct cam_et *target,
760 struct cam_ed *device,
761 void *async_arg);
762 static path_id_t xptnextfreepathid(void);
763 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
764 static union ccb *xpt_get_ccb(struct cam_ed *device);
765 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
766 u_int32_t new_priority);
767 static void xpt_run_dev_allocq(struct cam_eb *bus);
768 static void xpt_run_dev_sendq(struct cam_eb *bus);
769 static timeout_t xpt_release_devq_timeout;
770 static void xpt_release_simq_timeout(void *arg) __unused;
771 static void xpt_release_bus(struct cam_eb *bus);
772 static void xpt_release_devq_device(struct cam_ed *dev, u_int count,
773 int run_queue);
774 static struct cam_et*
775 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
776 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target);
777 static struct cam_ed*
778 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
779 lun_id_t lun_id);
780 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target,
781 struct cam_ed *device);
782 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
783 static struct cam_eb*
784 xpt_find_bus(path_id_t path_id);
785 static struct cam_et*
786 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
787 static struct cam_ed*
788 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
789 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
790 static void xpt_scan_lun(struct cam_periph *periph,
791 struct cam_path *path, cam_flags flags,
792 union ccb *ccb);
793 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb);
794 static xpt_busfunc_t xptconfigbuscountfunc;
795 static xpt_busfunc_t xptconfigfunc;
796 static void xpt_config(void *arg);
797 static xpt_devicefunc_t xptpassannouncefunc;
798 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
799 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
800 static void xptpoll(struct cam_sim *sim);
801 static void camisr(void *);
802 static void camisr_runqueue(void *);
803 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
804 u_int num_patterns, struct cam_eb *bus);
805 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
806 u_int num_patterns,
807 struct cam_ed *device);
808 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
809 u_int num_patterns,
810 struct cam_periph *periph);
811 static xpt_busfunc_t xptedtbusfunc;
812 static xpt_targetfunc_t xptedttargetfunc;
813 static xpt_devicefunc_t xptedtdevicefunc;
814 static xpt_periphfunc_t xptedtperiphfunc;
815 static xpt_pdrvfunc_t xptplistpdrvfunc;
816 static xpt_periphfunc_t xptplistperiphfunc;
817 static int xptedtmatch(struct ccb_dev_match *cdm);
818 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
819 static int xptbustraverse(struct cam_eb *start_bus,
820 xpt_busfunc_t *tr_func, void *arg);
821 static int xpttargettraverse(struct cam_eb *bus,
822 struct cam_et *start_target,
823 xpt_targetfunc_t *tr_func, void *arg);
824 static int xptdevicetraverse(struct cam_et *target,
825 struct cam_ed *start_device,
826 xpt_devicefunc_t *tr_func, void *arg);
827 static int xptperiphtraverse(struct cam_ed *device,
828 struct cam_periph *start_periph,
829 xpt_periphfunc_t *tr_func, void *arg);
830 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
831 xpt_pdrvfunc_t *tr_func, void *arg);
832 static int xptpdperiphtraverse(struct periph_driver **pdrv,
833 struct cam_periph *start_periph,
834 xpt_periphfunc_t *tr_func,
835 void *arg);
836 static xpt_busfunc_t xptdefbusfunc;
837 static xpt_targetfunc_t xptdeftargetfunc;
838 static xpt_devicefunc_t xptdefdevicefunc;
839 static xpt_periphfunc_t xptdefperiphfunc;
840 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
841 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func,
842 void *arg);
843 static xpt_devicefunc_t xptsetasyncfunc;
844 static xpt_busfunc_t xptsetasyncbusfunc;
845 static cam_status xptregister(struct cam_periph *periph,
846 void *arg);
847 static cam_status proberegister(struct cam_periph *periph,
848 void *arg);
849 static void probeschedule(struct cam_periph *probe_periph);
850 static void probestart(struct cam_periph *periph, union ccb *start_ccb);
851 static void proberequestdefaultnegotiation(struct cam_periph *periph);
852 static int proberequestbackoff(struct cam_periph *periph,
853 struct cam_ed *device);
854 static void probedone(struct cam_periph *periph, union ccb *done_ccb);
855 static void probecleanup(struct cam_periph *periph);
856 static void xpt_find_quirk(struct cam_ed *device);
857 static void xpt_devise_transport(struct cam_path *path);
858 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts,
859 struct cam_ed *device,
860 int async_update);
861 static void xpt_toggle_tags(struct cam_path *path);
862 static void xpt_start_tags(struct cam_path *path);
863 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
864 struct cam_ed *dev);
865 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
866 struct cam_ed *dev);
867 static __inline int periph_is_queued(struct cam_periph *periph);
868 static __inline int device_is_alloc_queued(struct cam_ed *device);
869 static __inline int device_is_send_queued(struct cam_ed *device);
870 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
871
872 static __inline int
873 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
874 {
875 int retval;
876
877 if (dev->ccbq.devq_openings > 0) {
878 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
879 cam_ccbq_resize(&dev->ccbq,
880 dev->ccbq.dev_openings
881 + dev->ccbq.dev_active);
882 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
883 }
884 /*
885 * The priority of a device waiting for CCB resources
886 * is that of the highest priority peripheral driver
887 * enqueued.
888 */
889 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
890 &dev->alloc_ccb_entry.pinfo,
891 CAMQ_GET_HEAD(&dev->drvq)->priority);
892 } else {
893 retval = 0;
894 }
895
896 return (retval);
897 }
898
899 static __inline int
900 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
901 {
902 int retval;
903
904 if (dev->ccbq.dev_openings > 0) {
905 /*
906 * The priority of a device waiting for controller
907 * resources is that of the highest priority CCB
908 * enqueued.
909 */
910 retval =
911 xpt_schedule_dev(&bus->sim->devq->send_queue,
912 &dev->send_ccb_entry.pinfo,
913 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
914 } else {
915 retval = 0;
916 }
917 return (retval);
918 }
919
920 static __inline int
921 periph_is_queued(struct cam_periph *periph)
922 {
923 return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
924 }
925
926 static __inline int
927 device_is_alloc_queued(struct cam_ed *device)
928 {
929 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
930 }
931
932 static __inline int
933 device_is_send_queued(struct cam_ed *device)
934 {
935 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
936 }
937
938 static __inline int
939 dev_allocq_is_runnable(struct cam_devq *devq)
940 {
941 /*
942 * Have work to do.
943 * Have space to do more work.
944 * Allowed to do work.
945 */
946 return ((devq->alloc_queue.qfrozen_cnt == 0)
947 && (devq->alloc_queue.entries > 0)
948 && (devq->alloc_openings > 0));
949 }
950
951 static void
952 xpt_periph_init()
953 {
954 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
955 }
956
957 static void
958 probe_periph_init()
959 {
960 }
961
962
963 static void
964 xptdone(struct cam_periph *periph, union ccb *done_ccb)
965 {
966 /* Caller will release the CCB */
967 wakeup(&done_ccb->ccb_h.cbfcnp);
968 }
969
970 static int
971 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
972 {
973
974 /*
975 * Only allow read-write access.
976 */
977 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
978 return(EPERM);
979
980 /*
981 * We don't allow nonblocking access.
982 */
983 if ((flags & O_NONBLOCK) != 0) {
984 printf("%s: can't do nonblocking access\n", devtoname(dev));
985 return(ENODEV);
986 }
987
988 /* Mark ourselves open */
989 mtx_lock(&xsoftc.xpt_lock);
990 xsoftc.flags |= XPT_FLAG_OPEN;
991 mtx_unlock(&xsoftc.xpt_lock);
992
993 return(0);
994 }
995
996 static int
997 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
998 {
999
1000 /* Mark ourselves closed */
1001 mtx_lock(&xsoftc.xpt_lock);
1002 xsoftc.flags &= ~XPT_FLAG_OPEN;
1003 mtx_unlock(&xsoftc.xpt_lock);
1004
1005 return(0);
1006 }
1007
1008 /*
1009 * Don't automatically grab the xpt softc lock here even though this is going
1010 * through the xpt device. The xpt device is really just a back door for
1011 * accessing other devices and SIMs, so the right thing to do is to grab
1012 * the appropriate SIM lock once the bus/SIM is located.
1013 */
1014 static int
1015 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1016 {
1017 int error;
1018
1019 error = 0;
1020
1021 switch(cmd) {
1022 /*
1023 * For the transport layer CAMIOCOMMAND ioctl, we really only want
1024 * to accept CCB types that don't quite make sense to send through a
1025 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
1026 * in the CAM spec.
1027 */
1028 case CAMIOCOMMAND: {
1029 union ccb *ccb;
1030 union ccb *inccb;
1031 struct cam_eb *bus;
1032
1033 inccb = (union ccb *)addr;
1034
1035 bus = xpt_find_bus(inccb->ccb_h.path_id);
1036 if (bus == NULL) {
1037 error = EINVAL;
1038 break;
1039 }
1040
1041 switch(inccb->ccb_h.func_code) {
1042 case XPT_SCAN_BUS:
1043 case XPT_RESET_BUS:
1044 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
1045 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
1046 error = EINVAL;
1047 break;
1048 }
1049 /* FALLTHROUGH */
1050 case XPT_PATH_INQ:
1051 case XPT_ENG_INQ:
1052 case XPT_SCAN_LUN:
1053
1054 ccb = xpt_alloc_ccb();
1055
1056 CAM_SIM_LOCK(bus->sim);
1057
1058 /*
1059 * Create a path using the bus, target, and lun the
1060 * user passed in.
1061 */
1062 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1063 inccb->ccb_h.path_id,
1064 inccb->ccb_h.target_id,
1065 inccb->ccb_h.target_lun) !=
1066 CAM_REQ_CMP){
1067 error = EINVAL;
1068 CAM_SIM_UNLOCK(bus->sim);
1069 xpt_free_ccb(ccb);
1070 break;
1071 }
1072 /* Ensure all of our fields are correct */
1073 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1074 inccb->ccb_h.pinfo.priority);
1075 xpt_merge_ccb(ccb, inccb);
1076 ccb->ccb_h.cbfcnp = xptdone;
1077 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1078 bcopy(ccb, inccb, sizeof(union ccb));
1079 xpt_free_path(ccb->ccb_h.path);
1080 xpt_free_ccb(ccb);
1081 CAM_SIM_UNLOCK(bus->sim);
1082 break;
1083
1084 case XPT_DEBUG: {
1085 union ccb ccb;
1086
1087 /*
1088 * This is an immediate CCB, so it's okay to
1089 * allocate it on the stack.
1090 */
1091
1092 CAM_SIM_LOCK(bus->sim);
1093
1094 /*
1095 * Create a path using the bus, target, and lun the
1096 * user passed in.
1097 */
1098 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1099 inccb->ccb_h.path_id,
1100 inccb->ccb_h.target_id,
1101 inccb->ccb_h.target_lun) !=
1102 CAM_REQ_CMP){
1103 error = EINVAL;
1104 CAM_SIM_UNLOCK(bus->sim);
1105 break;
1106 }
1107 /* Ensure all of our fields are correct */
1108 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1109 inccb->ccb_h.pinfo.priority);
1110 xpt_merge_ccb(&ccb, inccb);
1111 ccb.ccb_h.cbfcnp = xptdone;
1112 xpt_action(&ccb);
1113 CAM_SIM_UNLOCK(bus->sim);
1114 bcopy(&ccb, inccb, sizeof(union ccb));
1115 xpt_free_path(ccb.ccb_h.path);
1116 break;
1117
1118 }
1119 case XPT_DEV_MATCH: {
1120 struct cam_periph_map_info mapinfo;
1121 struct cam_path *old_path;
1122
1123 /*
1124 * We can't deal with physical addresses for this
1125 * type of transaction.
1126 */
1127 if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1128 error = EINVAL;
1129 break;
1130 }
1131
1132 /*
1133 * Save this in case the caller had it set to
1134 * something in particular.
1135 */
1136 old_path = inccb->ccb_h.path;
1137
1138 /*
1139 * We really don't need a path for the matching
1140 * code. The path is needed because of the
1141 * debugging statements in xpt_action(). They
1142 * assume that the CCB has a valid path.
1143 */
1144 inccb->ccb_h.path = xpt_periph->path;
1145
1146 bzero(&mapinfo, sizeof(mapinfo));
1147
1148 /*
1149 * Map the pattern and match buffers into kernel
1150 * virtual address space.
1151 */
1152 error = cam_periph_mapmem(inccb, &mapinfo);
1153
1154 if (error) {
1155 inccb->ccb_h.path = old_path;
1156 break;
1157 }
1158
1159 /*
1160 * This is an immediate CCB, we can send it on directly.
1161 */
1162 xpt_action(inccb);
1163
1164 /*
1165 * Map the buffers back into user space.
1166 */
1167 cam_periph_unmapmem(inccb, &mapinfo);
1168
1169 inccb->ccb_h.path = old_path;
1170
1171 error = 0;
1172 break;
1173 }
1174 default:
1175 error = ENOTSUP;
1176 break;
1177 }
1178 xpt_release_bus(bus);
1179 break;
1180 }
1181 /*
1182 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1183 * with the periphal driver name and unit name filled in. The other
1184 * fields don't really matter as input. The passthrough driver name
1185 * ("pass"), and unit number are passed back in the ccb. The current
1186 * device generation number, and the index into the device peripheral
1187 * driver list, and the status are also passed back. Note that
1188 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1189 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
1190 * (or rather should be) impossible for the device peripheral driver
1191 * list to change since we look at the whole thing in one pass, and
1192 * we do it with lock protection.
1193 *
1194 */
1195 case CAMGETPASSTHRU: {
1196 union ccb *ccb;
1197 struct cam_periph *periph;
1198 struct periph_driver **p_drv;
1199 char *name;
1200 u_int unit;
1201 u_int cur_generation;
1202 int base_periph_found;
1203 int splbreaknum;
1204
1205 ccb = (union ccb *)addr;
1206 unit = ccb->cgdl.unit_number;
1207 name = ccb->cgdl.periph_name;
1208 /*
1209 * Every 100 devices, we want to drop our lock protection to
1210 * give the software interrupt handler a chance to run.
1211 * Most systems won't run into this check, but this should
1212 * avoid starvation in the software interrupt handler in
1213 * large systems.
1214 */
1215 splbreaknum = 100;
1216
1217 ccb = (union ccb *)addr;
1218
1219 base_periph_found = 0;
1220
1221 /*
1222 * Sanity check -- make sure we don't get a null peripheral
1223 * driver name.
1224 */
1225 if (*ccb->cgdl.periph_name == '\0') {
1226 error = EINVAL;
1227 break;
1228 }
1229
1230 /* Keep the list from changing while we traverse it */
1231 mtx_lock(&xsoftc.xpt_topo_lock);
1232 ptstartover:
1233 cur_generation = xsoftc.xpt_generation;
1234
1235 /* first find our driver in the list of drivers */
1236 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
1237 if (strcmp((*p_drv)->driver_name, name) == 0)
1238 break;
1239
1240 if (*p_drv == NULL) {
1241 mtx_unlock(&xsoftc.xpt_topo_lock);
1242 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1243 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1244 *ccb->cgdl.periph_name = '\0';
1245 ccb->cgdl.unit_number = 0;
1246 error = ENOENT;
1247 break;
1248 }
1249
1250 /*
1251 * Run through every peripheral instance of this driver
1252 * and check to see whether it matches the unit passed
1253 * in by the user. If it does, get out of the loops and
1254 * find the passthrough driver associated with that
1255 * peripheral driver.
1256 */
1257 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1258 periph = TAILQ_NEXT(periph, unit_links)) {
1259
1260 if (periph->unit_number == unit) {
1261 break;
1262 } else if (--splbreaknum == 0) {
1263 mtx_unlock(&xsoftc.xpt_topo_lock);
1264 mtx_lock(&xsoftc.xpt_topo_lock);
1265 splbreaknum = 100;
1266 if (cur_generation != xsoftc.xpt_generation)
1267 goto ptstartover;
1268 }
1269 }
1270 /*
1271 * If we found the peripheral driver that the user passed
1272 * in, go through all of the peripheral drivers for that
1273 * particular device and look for a passthrough driver.
1274 */
1275 if (periph != NULL) {
1276 struct cam_ed *device;
1277 int i;
1278
1279 base_periph_found = 1;
1280 device = periph->path->device;
1281 for (i = 0, periph = SLIST_FIRST(&device->periphs);
1282 periph != NULL;
1283 periph = SLIST_NEXT(periph, periph_links), i++) {
1284 /*
1285 * Check to see whether we have a
1286 * passthrough device or not.
1287 */
1288 if (strcmp(periph->periph_name, "pass") == 0) {
1289 /*
1290 * Fill in the getdevlist fields.
1291 */
1292 strcpy(ccb->cgdl.periph_name,
1293 periph->periph_name);
1294 ccb->cgdl.unit_number =
1295 periph->unit_number;
1296 if (SLIST_NEXT(periph, periph_links))
1297 ccb->cgdl.status =
1298 CAM_GDEVLIST_MORE_DEVS;
1299 else
1300 ccb->cgdl.status =
1301 CAM_GDEVLIST_LAST_DEVICE;
1302 ccb->cgdl.generation =
1303 device->generation;
1304 ccb->cgdl.index = i;
1305 /*
1306 * Fill in some CCB header fields
1307 * that the user may want.
1308 */
1309 ccb->ccb_h.path_id =
1310 periph->path->bus->path_id;
1311 ccb->ccb_h.target_id =
1312 periph->path->target->target_id;
1313 ccb->ccb_h.target_lun =
1314 periph->path->device->lun_id;
1315 ccb->ccb_h.status = CAM_REQ_CMP;
1316 break;
1317 }
1318 }
1319 }
1320
1321 /*
1322 * If the periph is null here, one of two things has
1323 * happened. The first possibility is that we couldn't
1324 * find the unit number of the particular peripheral driver
1325 * that the user is asking about. e.g. the user asks for
1326 * the passthrough driver for "da11". We find the list of
1327 * "da" peripherals all right, but there is no unit 11.
1328 * The other possibility is that we went through the list
1329 * of peripheral drivers attached to the device structure,
1330 * but didn't find one with the name "pass". Either way,
1331 * we return ENOENT, since we couldn't find something.
1332 */
1333 if (periph == NULL) {
1334 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1335 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1336 *ccb->cgdl.periph_name = '\0';
1337 ccb->cgdl.unit_number = 0;
1338 error = ENOENT;
1339 /*
1340 * It is unfortunate that this is even necessary,
1341 * but there are many, many clueless users out there.
1342 * If this is true, the user is looking for the
1343 * passthrough driver, but doesn't have one in his
1344 * kernel.
1345 */
1346 if (base_periph_found == 1) {
1347 printf("xptioctl: pass driver is not in the "
1348 "kernel\n");
1349 printf("xptioctl: put \"device pass\" in "
1350 "your kernel config file\n");
1351 }
1352 }
1353 mtx_unlock(&xsoftc.xpt_topo_lock);
1354 break;
1355 }
1356 default:
1357 error = ENOTTY;
1358 break;
1359 }
1360
1361 return(error);
1362 }
1363
1364 static int
1365 cam_module_event_handler(module_t mod, int what, void *arg)
1366 {
1367 int error;
1368
1369 switch (what) {
1370 case MOD_LOAD:
1371 if ((error = xpt_init(NULL)) != 0)
1372 return (error);
1373 break;
1374 case MOD_UNLOAD:
1375 return EBUSY;
1376 default:
1377 return EOPNOTSUPP;
1378 }
1379
1380 return 0;
1381 }
1382
1383 /* thread to handle bus rescans */
1384 static void
1385 xpt_scanner_thread(void *dummy)
1386 {
1387 cam_isrq_t queue;
1388 union ccb *ccb;
1389 struct cam_sim *sim;
1390
1391 for (;;) {
1392 /*
1393 * Wait for a rescan request to come in. When it does, splice
1394 * it onto a queue from local storage so that the xpt lock
1395 * doesn't need to be held while the requests are being
1396 * processed.
1397 */
1398 xpt_lock_buses();
1399 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
1400 "ccb_scanq", 0);
1401 TAILQ_INIT(&queue);
1402 TAILQ_CONCAT(&queue, &xsoftc.ccb_scanq, sim_links.tqe);
1403 xpt_unlock_buses();
1404
1405 while ((ccb = (union ccb *)TAILQ_FIRST(&queue)) != NULL) {
1406 TAILQ_REMOVE(&queue, &ccb->ccb_h, sim_links.tqe);
1407
1408 sim = ccb->ccb_h.path->bus->sim;
1409 CAM_SIM_LOCK(sim);
1410
1411 ccb->ccb_h.func_code = XPT_SCAN_BUS;
1412 ccb->ccb_h.cbfcnp = xptdone;
1413 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 5);
1414 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1415 xpt_free_path(ccb->ccb_h.path);
1416 xpt_free_ccb(ccb);
1417 CAM_SIM_UNLOCK(sim);
1418 }
1419 }
1420 }
1421
1422 void
1423 xpt_rescan(union ccb *ccb)
1424 {
1425 struct ccb_hdr *hdr;
1426
1427 /*
1428 * Don't make duplicate entries for the same paths.
1429 */
1430 xpt_lock_buses();
1431 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
1432 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
1433 xpt_unlock_buses();
1434 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
1435 xpt_free_path(ccb->ccb_h.path);
1436 xpt_free_ccb(ccb);
1437 return;
1438 }
1439 }
1440 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
1441 wakeup(&xsoftc.ccb_scanq);
1442 xpt_unlock_buses();
1443 }
1444
1445 /* Functions accessed by the peripheral drivers */
1446 static int
1447 xpt_init(void *dummy)
1448 {
1449 struct cam_sim *xpt_sim;
1450 struct cam_path *path;
1451 struct cam_devq *devq;
1452 cam_status status;
1453
1454 TAILQ_INIT(&xsoftc.xpt_busses);
1455 TAILQ_INIT(&cam_simq);
1456 TAILQ_INIT(&xsoftc.ccb_scanq);
1457 STAILQ_INIT(&xsoftc.highpowerq);
1458 xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
1459
1460 mtx_init(&cam_simq_lock, "CAM SIMQ lock", NULL, MTX_DEF);
1461 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
1462 mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF);
1463
1464 /*
1465 * The xpt layer is, itself, the equivelent of a SIM.
1466 * Allow 16 ccbs in the ccb pool for it. This should
1467 * give decent parallelism when we probe busses and
1468 * perform other XPT functions.
1469 */
1470 devq = cam_simq_alloc(16);
1471 xpt_sim = cam_sim_alloc(xptaction,
1472 xptpoll,
1473 "xpt",
1474 /*softc*/NULL,
1475 /*unit*/0,
1476 /*mtx*/&xsoftc.xpt_lock,
1477 /*max_dev_transactions*/0,
1478 /*max_tagged_dev_transactions*/0,
1479 devq);
1480 if (xpt_sim == NULL)
1481 return (ENOMEM);
1482
1483 xpt_sim->max_ccbs = 16;
1484
1485 mtx_lock(&xsoftc.xpt_lock);
1486 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
1487 printf("xpt_init: xpt_bus_register failed with status %#x,"
1488 " failing attach\n", status);
1489 return (EINVAL);
1490 }
1491
1492 /*
1493 * Looking at the XPT from the SIM layer, the XPT is
1494 * the equivelent of a peripheral driver. Allocate
1495 * a peripheral driver entry for us.
1496 */
1497 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1498 CAM_TARGET_WILDCARD,
1499 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1500 printf("xpt_init: xpt_create_path failed with status %#x,"
1501 " failing attach\n", status);
1502 return (EINVAL);
1503 }
1504
1505 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1506 path, NULL, 0, xpt_sim);
1507 xpt_free_path(path);
1508 mtx_unlock(&xsoftc.xpt_lock);
1509
1510 /*
1511 * Register a callback for when interrupts are enabled.
1512 */
1513 xsoftc.xpt_config_hook =
1514 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
1515 M_CAMXPT, M_NOWAIT | M_ZERO);
1516 if (xsoftc.xpt_config_hook == NULL) {
1517 printf("xpt_init: Cannot malloc config hook "
1518 "- failing attach\n");
1519 return (ENOMEM);
1520 }
1521
1522 xsoftc.xpt_config_hook->ich_func = xpt_config;
1523 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
1524 free (xsoftc.xpt_config_hook, M_CAMXPT);
1525 printf("xpt_init: config_intrhook_establish failed "
1526 "- failing attach\n");
1527 }
1528
1529 /* fire up rescan thread */
1530 if (kthread_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) {
1531 printf("xpt_init: failed to create rescan thread\n");
1532 }
1533 /* Install our software interrupt handlers */
1534 swi_add(NULL, "cambio", camisr, NULL, SWI_CAMBIO, INTR_MPSAFE, &cambio_ih);
1535
1536 return (0);
1537 }
1538
1539 static cam_status
1540 xptregister(struct cam_periph *periph, void *arg)
1541 {
1542 struct cam_sim *xpt_sim;
1543
1544 if (periph == NULL) {
1545 printf("xptregister: periph was NULL!!\n");
1546 return(CAM_REQ_CMP_ERR);
1547 }
1548
1549 xpt_sim = (struct cam_sim *)arg;
1550 xpt_sim->softc = periph;
1551 xpt_periph = periph;
1552 periph->softc = NULL;
1553
1554 return(CAM_REQ_CMP);
1555 }
1556
1557 int32_t
1558 xpt_add_periph(struct cam_periph *periph)
1559 {
1560 struct cam_ed *device;
1561 int32_t status;
1562 struct periph_list *periph_head;
1563
1564 mtx_assert(periph->sim->mtx, MA_OWNED);
1565
1566 device = periph->path->device;
1567
1568 periph_head = &device->periphs;
1569
1570 status = CAM_REQ_CMP;
1571
1572 if (device != NULL) {
1573 /*
1574 * Make room for this peripheral
1575 * so it will fit in the queue
1576 * when it's scheduled to run
1577 */
1578 status = camq_resize(&device->drvq,
1579 device->drvq.array_size + 1);
1580
1581 device->generation++;
1582
1583 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1584 }
1585
1586 mtx_lock(&xsoftc.xpt_topo_lock);
1587 xsoftc.xpt_generation++;
1588 mtx_unlock(&xsoftc.xpt_topo_lock);
1589
1590 return (status);
1591 }
1592
1593 void
1594 xpt_remove_periph(struct cam_periph *periph)
1595 {
1596 struct cam_ed *device;
1597
1598 mtx_assert(periph->sim->mtx, MA_OWNED);
1599
1600 device = periph->path->device;
1601
1602 if (device != NULL) {
1603 struct periph_list *periph_head;
1604
1605 periph_head = &device->periphs;
1606
1607 /* Release the slot for this peripheral */
1608 camq_resize(&device->drvq, device->drvq.array_size - 1);
1609
1610 device->generation++;
1611
1612 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1613 }
1614
1615 mtx_lock(&xsoftc.xpt_topo_lock);
1616 xsoftc.xpt_generation++;
1617 mtx_unlock(&xsoftc.xpt_topo_lock);
1618 }
1619
1620
1621 void
1622 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1623 {
1624 struct ccb_pathinq cpi;
1625 struct ccb_trans_settings cts;
1626 struct cam_path *path;
1627 u_int speed;
1628 u_int freq;
1629 u_int mb;
1630
1631 mtx_assert(periph->sim->mtx, MA_OWNED);
1632
1633 path = periph->path;
1634 /*
1635 * To ensure that this is printed in one piece,
1636 * mask out CAM interrupts.
1637 */
1638 printf("%s%d at %s%d bus %d target %d lun %d\n",
1639 periph->periph_name, periph->unit_number,
1640 path->bus->sim->sim_name,
1641 path->bus->sim->unit_number,
1642 path->bus->sim->bus_id,
1643 path->target->target_id,
1644 path->device->lun_id);
1645 printf("%s%d: ", periph->periph_name, periph->unit_number);
1646 scsi_print_inquiry(&path->device->inq_data);
1647 if (bootverbose && path->device->serial_num_len > 0) {
1648 /* Don't wrap the screen - print only the first 60 chars */
1649 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1650 periph->unit_number, path->device->serial_num);
1651 }
1652 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1653 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1654 cts.type = CTS_TYPE_CURRENT_SETTINGS;
1655 xpt_action((union ccb*)&cts);
1656 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1657 return;
1658 }
1659
1660 /* Ask the SIM for its base transfer speed */
1661 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1662 cpi.ccb_h.func_code = XPT_PATH_INQ;
1663 xpt_action((union ccb *)&cpi);
1664
1665 speed = cpi.base_transfer_speed;
1666 freq = 0;
1667 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1668 struct ccb_trans_settings_spi *spi;
1669
1670 spi = &cts.xport_specific.spi;
1671 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0
1672 && spi->sync_offset != 0) {
1673 freq = scsi_calc_syncsrate(spi->sync_period);
1674 speed = freq;
1675 }
1676
1677 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0)
1678 speed *= (0x01 << spi->bus_width);
1679 }
1680
1681 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1682 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc;
1683 if (fc->valid & CTS_FC_VALID_SPEED) {
1684 speed = fc->bitrate;
1685 }
1686 }
1687
1688 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) {
1689 struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas;
1690 if (sas->valid & CTS_SAS_VALID_SPEED) {
1691 speed = sas->bitrate;
1692 }
1693 }
1694
1695 mb = speed / 1000;
1696 if (mb > 0)
1697 printf("%s%d: %d.%03dMB/s transfers",
1698 periph->periph_name, periph->unit_number,
1699 mb, speed % 1000);
1700 else
1701 printf("%s%d: %dKB/s transfers", periph->periph_name,
1702 periph->unit_number, speed);
1703 /* Report additional information about SPI connections */
1704 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1705 struct ccb_trans_settings_spi *spi;
1706
1707 spi = &cts.xport_specific.spi;
1708 if (freq != 0) {
1709 printf(" (%d.%03dMHz%s, offset %d", freq / 1000,
1710 freq % 1000,
1711 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
1712 ? " DT" : "",
1713 spi->sync_offset);
1714 }
1715 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0
1716 && spi->bus_width > 0) {
1717 if (freq != 0) {
1718 printf(", ");
1719 } else {
1720 printf(" (");
1721 }
1722 printf("%dbit)", 8 * (0x01 << spi->bus_width));
1723 } else if (freq != 0) {
1724 printf(")");
1725 }
1726 }
1727 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1728 struct ccb_trans_settings_fc *fc;
1729
1730 fc = &cts.xport_specific.fc;
1731 if (fc->valid & CTS_FC_VALID_WWNN)
1732 printf(" WWNN 0x%llx", (long long) fc->wwnn);
1733 if (fc->valid & CTS_FC_VALID_WWPN)
1734 printf(" WWPN 0x%llx", (long long) fc->wwpn);
1735 if (fc->valid & CTS_FC_VALID_PORT)
1736 printf(" PortID 0x%x", fc->port);
1737 }
1738
1739 if (path->device->inq_flags & SID_CmdQue
1740 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1741 printf("\n%s%d: Command Queueing Enabled",
1742 periph->periph_name, periph->unit_number);
1743 }
1744 printf("\n");
1745
1746 /*
1747 * We only want to print the caller's announce string if they've
1748 * passed one in..
1749 */
1750 if (announce_string != NULL)
1751 printf("%s%d: %s\n", periph->periph_name,
1752 periph->unit_number, announce_string);
1753 }
1754
1755 static dev_match_ret
1756 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1757 struct cam_eb *bus)
1758 {
1759 dev_match_ret retval;
1760 int i;
1761
1762 retval = DM_RET_NONE;
1763
1764 /*
1765 * If we aren't given something to match against, that's an error.
1766 */
1767 if (bus == NULL)
1768 return(DM_RET_ERROR);
1769
1770 /*
1771 * If there are no match entries, then this bus matches no
1772 * matter what.
1773 */
1774 if ((patterns == NULL) || (num_patterns == 0))
1775 return(DM_RET_DESCEND | DM_RET_COPY);
1776
1777 for (i = 0; i < num_patterns; i++) {
1778 struct bus_match_pattern *cur_pattern;
1779
1780 /*
1781 * If the pattern in question isn't for a bus node, we
1782 * aren't interested. However, we do indicate to the
1783 * calling routine that we should continue descending the
1784 * tree, since the user wants to match against lower-level
1785 * EDT elements.
1786 */
1787 if (patterns[i].type != DEV_MATCH_BUS) {
1788 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1789 retval |= DM_RET_DESCEND;
1790 continue;
1791 }
1792
1793 cur_pattern = &patterns[i].pattern.bus_pattern;
1794
1795 /*
1796 * If they want to match any bus node, we give them any
1797 * device node.
1798 */
1799 if (cur_pattern->flags == BUS_MATCH_ANY) {
1800 /* set the copy flag */
1801 retval |= DM_RET_COPY;
1802
1803 /*
1804 * If we've already decided on an action, go ahead
1805 * and return.
1806 */
1807 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1808 return(retval);
1809 }
1810
1811 /*
1812 * Not sure why someone would do this...
1813 */
1814 if (cur_pattern->flags == BUS_MATCH_NONE)
1815 continue;
1816
1817 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1818 && (cur_pattern->path_id != bus->path_id))
1819 continue;
1820
1821 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1822 && (cur_pattern->bus_id != bus->sim->bus_id))
1823 continue;
1824
1825 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1826 && (cur_pattern->unit_number != bus->sim->unit_number))
1827 continue;
1828
1829 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1830 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1831 DEV_IDLEN) != 0))
1832 continue;
1833
1834 /*
1835 * If we get to this point, the user definitely wants
1836 * information on this bus. So tell the caller to copy the
1837 * data out.
1838 */
1839 retval |= DM_RET_COPY;
1840
1841 /*
1842 * If the return action has been set to descend, then we
1843 * know that we've already seen a non-bus matching
1844 * expression, therefore we need to further descend the tree.
1845 * This won't change by continuing around the loop, so we
1846 * go ahead and return. If we haven't seen a non-bus
1847 * matching expression, we keep going around the loop until
1848 * we exhaust the matching expressions. We'll set the stop
1849 * flag once we fall out of the loop.
1850 */
1851 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1852 return(retval);
1853 }
1854
1855 /*
1856 * If the return action hasn't been set to descend yet, that means
1857 * we haven't seen anything other than bus matching patterns. So
1858 * tell the caller to stop descending the tree -- the user doesn't
1859 * want to match against lower level tree elements.
1860 */
1861 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1862 retval |= DM_RET_STOP;
1863
1864 return(retval);
1865 }
1866
1867 static dev_match_ret
1868 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1869 struct cam_ed *device)
1870 {
1871 dev_match_ret retval;
1872 int i;
1873
1874 retval = DM_RET_NONE;
1875
1876 /*
1877 * If we aren't given something to match against, that's an error.
1878 */
1879 if (device == NULL)
1880 return(DM_RET_ERROR);
1881
1882 /*
1883 * If there are no match entries, then this device matches no
1884 * matter what.
1885 */
1886 if ((patterns == NULL) || (num_patterns == 0))
1887 return(DM_RET_DESCEND | DM_RET_COPY);
1888
1889 for (i = 0; i < num_patterns; i++) {
1890 struct device_match_pattern *cur_pattern;
1891
1892 /*
1893 * If the pattern in question isn't for a device node, we
1894 * aren't interested.
1895 */
1896 if (patterns[i].type != DEV_MATCH_DEVICE) {
1897 if ((patterns[i].type == DEV_MATCH_PERIPH)
1898 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1899 retval |= DM_RET_DESCEND;
1900 continue;
1901 }
1902
1903 cur_pattern = &patterns[i].pattern.device_pattern;
1904
1905 /*
1906 * If they want to match any device node, we give them any
1907 * device node.
1908 */
1909 if (cur_pattern->flags == DEV_MATCH_ANY) {
1910 /* set the copy flag */
1911 retval |= DM_RET_COPY;
1912
1913
1914 /*
1915 * If we've already decided on an action, go ahead
1916 * and return.
1917 */
1918 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1919 return(retval);
1920 }
1921
1922 /*
1923 * Not sure why someone would do this...
1924 */
1925 if (cur_pattern->flags == DEV_MATCH_NONE)
1926 continue;
1927
1928 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1929 && (cur_pattern->path_id != device->target->bus->path_id))
1930 continue;
1931
1932 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1933 && (cur_pattern->target_id != device->target->target_id))
1934 continue;
1935
1936 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1937 && (cur_pattern->target_lun != device->lun_id))
1938 continue;
1939
1940 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1941 && (cam_quirkmatch((caddr_t)&device->inq_data,
1942 (caddr_t)&cur_pattern->inq_pat,
1943 1, sizeof(cur_pattern->inq_pat),
1944 scsi_static_inquiry_match) == NULL))
1945 continue;
1946
1947 /*
1948 * If we get to this point, the user definitely wants
1949 * information on this device. So tell the caller to copy
1950 * the data out.
1951 */
1952 retval |= DM_RET_COPY;
1953
1954 /*
1955 * If the return action has been set to descend, then we
1956 * know that we've already seen a peripheral matching
1957 * expression, therefore we need to further descend the tree.
1958 * This won't change by continuing around the loop, so we
1959 * go ahead and return. If we haven't seen a peripheral
1960 * matching expression, we keep going around the loop until
1961 * we exhaust the matching expressions. We'll set the stop
1962 * flag once we fall out of the loop.
1963 */
1964 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1965 return(retval);
1966 }
1967
1968 /*
1969 * If the return action hasn't been set to descend yet, that means
1970 * we haven't seen any peripheral matching patterns. So tell the
1971 * caller to stop descending the tree -- the user doesn't want to
1972 * match against lower level tree elements.
1973 */
1974 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1975 retval |= DM_RET_STOP;
1976
1977 return(retval);
1978 }
1979
1980 /*
1981 * Match a single peripheral against any number of match patterns.
1982 */
1983 static dev_match_ret
1984 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1985 struct cam_periph *periph)
1986 {
1987 dev_match_ret retval;
1988 int i;
1989
1990 /*
1991 * If we aren't given something to match against, that's an error.
1992 */
1993 if (periph == NULL)
1994 return(DM_RET_ERROR);
1995
1996 /*
1997 * If there are no match entries, then this peripheral matches no
1998 * matter what.
1999 */
2000 if ((patterns == NULL) || (num_patterns == 0))
2001 return(DM_RET_STOP | DM_RET_COPY);
2002
2003 /*
2004 * There aren't any nodes below a peripheral node, so there's no
2005 * reason to descend the tree any further.
2006 */
2007 retval = DM_RET_STOP;
2008
2009 for (i = 0; i < num_patterns; i++) {
2010 struct periph_match_pattern *cur_pattern;
2011
2012 /*
2013 * If the pattern in question isn't for a peripheral, we
2014 * aren't interested.
2015 */
2016 if (patterns[i].type != DEV_MATCH_PERIPH)
2017 continue;
2018
2019 cur_pattern = &patterns[i].pattern.periph_pattern;
2020
2021 /*
2022 * If they want to match on anything, then we will do so.
2023 */
2024 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
2025 /* set the copy flag */
2026 retval |= DM_RET_COPY;
2027
2028 /*
2029 * We've already set the return action to stop,
2030 * since there are no nodes below peripherals in
2031 * the tree.
2032 */
2033 return(retval);
2034 }
2035
2036 /*
2037 * Not sure why someone would do this...
2038 */
2039 if (cur_pattern->flags == PERIPH_MATCH_NONE)
2040 continue;
2041
2042 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
2043 && (cur_pattern->path_id != periph->path->bus->path_id))
2044 continue;
2045
2046 /*
2047 * For the target and lun id's, we have to make sure the
2048 * target and lun pointers aren't NULL. The xpt peripheral
2049 * has a wildcard target and device.
2050 */
2051 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
2052 && ((periph->path->target == NULL)
2053 ||(cur_pattern->target_id != periph->path->target->target_id)))
2054 continue;
2055
2056 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
2057 && ((periph->path->device == NULL)
2058 || (cur_pattern->target_lun != periph->path->device->lun_id)))
2059 continue;
2060
2061 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
2062 && (cur_pattern->unit_number != periph->unit_number))
2063 continue;
2064
2065 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
2066 && (strncmp(cur_pattern->periph_name, periph->periph_name,
2067 DEV_IDLEN) != 0))
2068 continue;
2069
2070 /*
2071 * If we get to this point, the user definitely wants
2072 * information on this peripheral. So tell the caller to
2073 * copy the data out.
2074 */
2075 retval |= DM_RET_COPY;
2076
2077 /*
2078 * The return action has already been set to stop, since
2079 * peripherals don't have any nodes below them in the EDT.
2080 */
2081 return(retval);
2082 }
2083
2084 /*
2085 * If we get to this point, the peripheral that was passed in
2086 * doesn't match any of the patterns.
2087 */
2088 return(retval);
2089 }
2090
2091 static int
2092 xptedtbusfunc(struct cam_eb *bus, void *arg)
2093 {
2094 struct ccb_dev_match *cdm;
2095 dev_match_ret retval;
2096
2097 cdm = (struct ccb_dev_match *)arg;
2098
2099 /*
2100 * If our position is for something deeper in the tree, that means
2101 * that we've already seen this node. So, we keep going down.
2102 */
2103 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2104 && (cdm->pos.cookie.bus == bus)
2105 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2106 && (cdm->pos.cookie.target != NULL))
2107 retval = DM_RET_DESCEND;
2108 else
2109 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
2110
2111 /*
2112 * If we got an error, bail out of the search.
2113 */
2114 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2115 cdm->status = CAM_DEV_MATCH_ERROR;
2116 return(0);
2117 }
2118
2119 /*
2120 * If the copy flag is set, copy this bus out.
2121 */
2122 if (retval & DM_RET_COPY) {
2123 int spaceleft, j;
2124
2125 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2126 sizeof(struct dev_match_result));
2127
2128 /*
2129 * If we don't have enough space to put in another
2130 * match result, save our position and tell the
2131 * user there are more devices to check.
2132 */
2133 if (spaceleft < sizeof(struct dev_match_result)) {
2134 bzero(&cdm->pos, sizeof(cdm->pos));
2135 cdm->pos.position_type =
2136 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
2137
2138 cdm->pos.cookie.bus = bus;
2139 cdm->pos.generations[CAM_BUS_GENERATION]=
2140 xsoftc.bus_generation;
2141 cdm->status = CAM_DEV_MATCH_MORE;
2142 return(0);
2143 }
2144 j = cdm->num_matches;
2145 cdm->num_matches++;
2146 cdm->matches[j].type = DEV_MATCH_BUS;
2147 cdm->matches[j].result.bus_result.path_id = bus->path_id;
2148 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
2149 cdm->matches[j].result.bus_result.unit_number =
2150 bus->sim->unit_number;
2151 strncpy(cdm->matches[j].result.bus_result.dev_name,
2152 bus->sim->sim_name, DEV_IDLEN);
2153 }
2154
2155 /*
2156 * If the user is only interested in busses, there's no
2157 * reason to descend to the next level in the tree.
2158 */
2159 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2160 return(1);
2161
2162 /*
2163 * If there is a target generation recorded, check it to
2164 * make sure the target list hasn't changed.
2165 */
2166 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2167 && (bus == cdm->pos.cookie.bus)
2168 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2169 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
2170 && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
2171 bus->generation)) {
2172 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2173 return(0);
2174 }
2175
2176 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2177 && (cdm->pos.cookie.bus == bus)
2178 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2179 && (cdm->pos.cookie.target != NULL))
2180 return(xpttargettraverse(bus,
2181 (struct cam_et *)cdm->pos.cookie.target,
2182 xptedttargetfunc, arg));
2183 else
2184 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
2185 }
2186
2187 static int
2188 xptedttargetfunc(struct cam_et *target, void *arg)
2189 {
2190 struct ccb_dev_match *cdm;
2191
2192 cdm = (struct ccb_dev_match *)arg;
2193
2194 /*
2195 * If there is a device list generation recorded, check it to
2196 * make sure the device list hasn't changed.
2197 */
2198 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2199 && (cdm->pos.cookie.bus == target->bus)
2200 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2201 && (cdm->pos.cookie.target == target)
2202 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2203 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2204 && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2205 target->generation)) {
2206 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2207 return(0);
2208 }
2209
2210 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2211 && (cdm->pos.cookie.bus == target->bus)
2212 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2213 && (cdm->pos.cookie.target == target)
2214 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2215 && (cdm->pos.cookie.device != NULL))
2216 return(xptdevicetraverse(target,
2217 (struct cam_ed *)cdm->pos.cookie.device,
2218 xptedtdevicefunc, arg));
2219 else
2220 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2221 }
2222
2223 static int
2224 xptedtdevicefunc(struct cam_ed *device, void *arg)
2225 {
2226
2227 struct ccb_dev_match *cdm;
2228 dev_match_ret retval;
2229
2230 cdm = (struct ccb_dev_match *)arg;
2231
2232 /*
2233 * If our position is for something deeper in the tree, that means
2234 * that we've already seen this node. So, we keep going down.
2235 */
2236 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2237 && (cdm->pos.cookie.device == device)
2238 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2239 && (cdm->pos.cookie.periph != NULL))
2240 retval = DM_RET_DESCEND;
2241 else
2242 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2243 device);
2244
2245 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2246 cdm->status = CAM_DEV_MATCH_ERROR;
2247 return(0);
2248 }
2249
2250 /*
2251 * If the copy flag is set, copy this device out.
2252 */
2253 if (retval & DM_RET_COPY) {
2254 int spaceleft, j;
2255
2256 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2257 sizeof(struct dev_match_result));
2258
2259 /*
2260 * If we don't have enough space to put in another
2261 * match result, save our position and tell the
2262 * user there are more devices to check.
2263 */
2264 if (spaceleft < sizeof(struct dev_match_result)) {
2265 bzero(&cdm->pos, sizeof(cdm->pos));
2266 cdm->pos.position_type =
2267 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2268 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2269
2270 cdm->pos.cookie.bus = device->target->bus;
2271 cdm->pos.generations[CAM_BUS_GENERATION]=
2272 xsoftc.bus_generation;
2273 cdm->pos.cookie.target = device->target;
2274 cdm->pos.generations[CAM_TARGET_GENERATION] =
2275 device->target->bus->generation;
2276 cdm->pos.cookie.device = device;
2277 cdm->pos.generations[CAM_DEV_GENERATION] =
2278 device->target->generation;
2279 cdm->status = CAM_DEV_MATCH_MORE;
2280 return(0);
2281 }
2282 j = cdm->num_matches;
2283 cdm->num_matches++;
2284 cdm->matches[j].type = DEV_MATCH_DEVICE;
2285 cdm->matches[j].result.device_result.path_id =
2286 device->target->bus->path_id;
2287 cdm->matches[j].result.device_result.target_id =
2288 device->target->target_id;
2289 cdm->matches[j].result.device_result.target_lun =
2290 device->lun_id;
2291 bcopy(&device->inq_data,
2292 &cdm->matches[j].result.device_result.inq_data,
2293 sizeof(struct scsi_inquiry_data));
2294
2295 /* Let the user know whether this device is unconfigured */
2296 if (device->flags & CAM_DEV_UNCONFIGURED)
2297 cdm->matches[j].result.device_result.flags =
2298 DEV_RESULT_UNCONFIGURED;
2299 else
2300 cdm->matches[j].result.device_result.flags =
2301 DEV_RESULT_NOFLAG;
2302 }
2303
2304 /*
2305 * If the user isn't interested in peripherals, don't descend
2306 * the tree any further.
2307 */
2308 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2309 return(1);
2310
2311 /*
2312 * If there is a peripheral list generation recorded, make sure
2313 * it hasn't changed.
2314 */
2315 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2316 && (device->target->bus == cdm->pos.cookie.bus)
2317 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2318 && (device->target == cdm->pos.cookie.target)
2319 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2320 && (device == cdm->pos.cookie.device)
2321 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2322 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2323 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2324 device->generation)){
2325 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2326 return(0);
2327 }
2328
2329 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2330 && (cdm->pos.cookie.bus == device->target->bus)
2331 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2332 && (cdm->pos.cookie.target == device->target)
2333 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2334 && (cdm->pos.cookie.device == device)
2335 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2336 && (cdm->pos.cookie.periph != NULL))
2337 return(xptperiphtraverse(device,
2338 (struct cam_periph *)cdm->pos.cookie.periph,
2339 xptedtperiphfunc, arg));
2340 else
2341 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2342 }
2343
2344 static int
2345 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2346 {
2347 struct ccb_dev_match *cdm;
2348 dev_match_ret retval;
2349
2350 cdm = (struct ccb_dev_match *)arg;
2351
2352 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2353
2354 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2355 cdm->status = CAM_DEV_MATCH_ERROR;
2356 return(0);
2357 }
2358
2359 /*
2360 * If the copy flag is set, copy this peripheral out.
2361 */
2362 if (retval & DM_RET_COPY) {
2363 int spaceleft, j;
2364
2365 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2366 sizeof(struct dev_match_result));
2367
2368 /*
2369 * If we don't have enough space to put in another
2370 * match result, save our position and tell the
2371 * user there are more devices to check.
2372 */
2373 if (spaceleft < sizeof(struct dev_match_result)) {
2374 bzero(&cdm->pos, sizeof(cdm->pos));
2375 cdm->pos.position_type =
2376 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2377 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2378 CAM_DEV_POS_PERIPH;
2379
2380 cdm->pos.cookie.bus = periph->path->bus;
2381 cdm->pos.generations[CAM_BUS_GENERATION]=
2382 xsoftc.bus_generation;
2383 cdm->pos.cookie.target = periph->path->target;
2384 cdm->pos.generations[CAM_TARGET_GENERATION] =
2385 periph->path->bus->generation;
2386 cdm->pos.cookie.device = periph->path->device;
2387 cdm->pos.generations[CAM_DEV_GENERATION] =
2388 periph->path->target->generation;
2389 cdm->pos.cookie.periph = periph;
2390 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2391 periph->path->device->generation;
2392 cdm->status = CAM_DEV_MATCH_MORE;
2393 return(0);
2394 }
2395
2396 j = cdm->num_matches;
2397 cdm->num_matches++;
2398 cdm->matches[j].type = DEV_MATCH_PERIPH;
2399 cdm->matches[j].result.periph_result.path_id =
2400 periph->path->bus->path_id;
2401 cdm->matches[j].result.periph_result.target_id =
2402 periph->path->target->target_id;
2403 cdm->matches[j].result.periph_result.target_lun =
2404 periph->path->device->lun_id;
2405 cdm->matches[j].result.periph_result.unit_number =
2406 periph->unit_number;
2407 strncpy(cdm->matches[j].result.periph_result.periph_name,
2408 periph->periph_name, DEV_IDLEN);
2409 }
2410
2411 return(1);
2412 }
2413
2414 static int
2415 xptedtmatch(struct ccb_dev_match *cdm)
2416 {
2417 int ret;
2418
2419 cdm->num_matches = 0;
2420
2421 /*
2422 * Check the bus list generation. If it has changed, the user
2423 * needs to reset everything and start over.
2424 */
2425 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2426 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2427 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) {
2428 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2429 return(0);
2430 }
2431
2432 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2433 && (cdm->pos.cookie.bus != NULL))
2434 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2435 xptedtbusfunc, cdm);
2436 else
2437 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2438
2439 /*
2440 * If we get back 0, that means that we had to stop before fully
2441 * traversing the EDT. It also means that one of the subroutines
2442 * has set the status field to the proper value. If we get back 1,
2443 * we've fully traversed the EDT and copied out any matching entries.
2444 */
2445 if (ret == 1)
2446 cdm->status = CAM_DEV_MATCH_LAST;
2447
2448 return(ret);
2449 }
2450
2451 static int
2452 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2453 {
2454 struct ccb_dev_match *cdm;
2455
2456 cdm = (struct ccb_dev_match *)arg;
2457
2458 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2459 && (cdm->pos.cookie.pdrv == pdrv)
2460 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2461 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2462 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2463 (*pdrv)->generation)) {
2464 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2465 return(0);
2466 }
2467
2468 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2469 && (cdm->pos.cookie.pdrv == pdrv)
2470 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2471 && (cdm->pos.cookie.periph != NULL))
2472 return(xptpdperiphtraverse(pdrv,
2473 (struct cam_periph *)cdm->pos.cookie.periph,
2474 xptplistperiphfunc, arg));
2475 else
2476 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2477 }
2478
2479 static int
2480 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2481 {
2482 struct ccb_dev_match *cdm;
2483 dev_match_ret retval;
2484
2485 cdm = (struct ccb_dev_match *)arg;
2486
2487 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2488
2489 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2490 cdm->status = CAM_DEV_MATCH_ERROR;
2491 return(0);
2492 }
2493
2494 /*
2495 * If the copy flag is set, copy this peripheral out.
2496 */
2497 if (retval & DM_RET_COPY) {
2498 int spaceleft, j;
2499
2500 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2501 sizeof(struct dev_match_result));
2502
2503 /*
2504 * If we don't have enough space to put in another
2505 * match result, save our position and tell the
2506 * user there are more devices to check.
2507 */
2508 if (spaceleft < sizeof(struct dev_match_result)) {
2509 struct periph_driver **pdrv;
2510
2511 pdrv = NULL;
2512 bzero(&cdm->pos, sizeof(cdm->pos));
2513 cdm->pos.position_type =
2514 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2515 CAM_DEV_POS_PERIPH;
2516
2517 /*
2518 * This may look a bit non-sensical, but it is
2519 * actually quite logical. There are very few
2520 * peripheral drivers, and bloating every peripheral
2521 * structure with a pointer back to its parent
2522 * peripheral driver linker set entry would cost
2523 * more in the long run than doing this quick lookup.
2524 */
2525 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2526 if (strcmp((*pdrv)->driver_name,
2527 periph->periph_name) == 0)
2528 break;
2529 }
2530
2531 if (*pdrv == NULL) {
2532 cdm->status = CAM_DEV_MATCH_ERROR;
2533 return(0);
2534 }
2535
2536 cdm->pos.cookie.pdrv = pdrv;
2537 /*
2538 * The periph generation slot does double duty, as
2539 * does the periph pointer slot. They are used for
2540 * both edt and pdrv lookups and positioning.
2541 */
2542 cdm->pos.cookie.periph = periph;
2543 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2544 (*pdrv)->generation;
2545 cdm->status = CAM_DEV_MATCH_MORE;
2546 return(0);
2547 }
2548
2549 j = cdm->num_matches;
2550 cdm->num_matches++;
2551 cdm->matches[j].type = DEV_MATCH_PERIPH;
2552 cdm->matches[j].result.periph_result.path_id =
2553 periph->path->bus->path_id;
2554
2555 /*
2556 * The transport layer peripheral doesn't have a target or
2557 * lun.
2558 */
2559 if (periph->path->target)
2560 cdm->matches[j].result.periph_result.target_id =
2561 periph->path->target->target_id;
2562 else
2563 cdm->matches[j].result.periph_result.target_id = -1;
2564
2565 if (periph->path->device)
2566 cdm->matches[j].result.periph_result.target_lun =
2567 periph->path->device->lun_id;
2568 else
2569 cdm->matches[j].result.periph_result.target_lun = -1;
2570
2571 cdm->matches[j].result.periph_result.unit_number =
2572 periph->unit_number;
2573 strncpy(cdm->matches[j].result.periph_result.periph_name,
2574 periph->periph_name, DEV_IDLEN);
2575 }
2576
2577 return(1);
2578 }
2579
2580 static int
2581 xptperiphlistmatch(struct ccb_dev_match *cdm)
2582 {
2583 int ret;
2584
2585 cdm->num_matches = 0;
2586
2587 /*
2588 * At this point in the edt traversal function, we check the bus
2589 * list generation to make sure that no busses have been added or
2590 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2591 * For the peripheral driver list traversal function, however, we
2592 * don't have to worry about new peripheral driver types coming or
2593 * going; they're in a linker set, and therefore can't change
2594 * without a recompile.
2595 */
2596
2597 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2598 && (cdm->pos.cookie.pdrv != NULL))
2599 ret = xptpdrvtraverse(
2600 (struct periph_driver **)cdm->pos.cookie.pdrv,
2601 xptplistpdrvfunc, cdm);
2602 else
2603 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2604
2605 /*
2606 * If we get back 0, that means that we had to stop before fully
2607 * traversing the peripheral driver tree. It also means that one of
2608 * the subroutines has set the status field to the proper value. If
2609 * we get back 1, we've fully traversed the EDT and copied out any
2610 * matching entries.
2611 */
2612 if (ret == 1)
2613 cdm->status = CAM_DEV_MATCH_LAST;
2614
2615 return(ret);
2616 }
2617
2618 static int
2619 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2620 {
2621 struct cam_eb *bus, *next_bus;
2622 int retval;
2623
2624 retval = 1;
2625
2626 mtx_lock(&xsoftc.xpt_topo_lock);
2627 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses));
2628 bus != NULL;
2629 bus = next_bus) {
2630 next_bus = TAILQ_NEXT(bus, links);
2631
2632 mtx_unlock(&xsoftc.xpt_topo_lock);
2633 CAM_SIM_LOCK(bus->sim);
2634 retval = tr_func(bus, arg);
2635 CAM_SIM_UNLOCK(bus->sim);
2636 if (retval == 0)
2637 return(retval);
2638 mtx_lock(&xsoftc.xpt_topo_lock);
2639 }
2640 mtx_unlock(&xsoftc.xpt_topo_lock);
2641
2642 return(retval);
2643 }
2644
2645 int
2646 xpt_sim_opened(struct cam_sim *sim)
2647 {
2648 struct cam_eb *bus;
2649 struct cam_et *target;
2650 struct cam_ed *device;
2651 struct cam_periph *periph;
2652
2653 KASSERT(sim->refcount >= 1, ("sim->refcount >= 1"));
2654 mtx_assert(sim->mtx, MA_OWNED);
2655
2656 mtx_lock(&xsoftc.xpt_topo_lock);
2657 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
2658 if (bus->sim != sim)
2659 continue;
2660
2661 TAILQ_FOREACH(target, &bus->et_entries, links) {
2662 TAILQ_FOREACH(device, &target->ed_entries, links) {
2663 SLIST_FOREACH(periph, &device->periphs,
2664 periph_links) {
2665 if (periph->refcount > 0) {
2666 mtx_unlock(&xsoftc.xpt_topo_lock);
2667 return (1);
2668 }
2669 }
2670 }
2671 }
2672 }
2673
2674 mtx_unlock(&xsoftc.xpt_topo_lock);
2675 return (0);
2676 }
2677
2678 static int
2679 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2680 xpt_targetfunc_t *tr_func, void *arg)
2681 {
2682 struct cam_et *target, *next_target;
2683 int retval;
2684
2685 retval = 1;
2686 for (target = (start_target ? start_target :
2687 TAILQ_FIRST(&bus->et_entries));
2688 target != NULL; target = next_target) {
2689
2690 next_target = TAILQ_NEXT(target, links);
2691
2692 retval = tr_func(target, arg);
2693
2694 if (retval == 0)
2695 return(retval);
2696 }
2697
2698 return(retval);
2699 }
2700
2701 static int
2702 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2703 xpt_devicefunc_t *tr_func, void *arg)
2704 {
2705 struct cam_ed *device, *next_device;
2706 int retval;
2707
2708 retval = 1;
2709 for (device = (start_device ? start_device :
2710 TAILQ_FIRST(&target->ed_entries));
2711 device != NULL;
2712 device = next_device) {
2713
2714 next_device = TAILQ_NEXT(device, links);
2715
2716 retval = tr_func(device, arg);
2717
2718 if (retval == 0)
2719 return(retval);
2720 }
2721
2722 return(retval);
2723 }
2724
2725 static int
2726 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2727 xpt_periphfunc_t *tr_func, void *arg)
2728 {
2729 struct cam_periph *periph, *next_periph;
2730 int retval;
2731
2732 retval = 1;
2733
2734 for (periph = (start_periph ? start_periph :
2735 SLIST_FIRST(&device->periphs));
2736 periph != NULL;
2737 periph = next_periph) {
2738
2739 next_periph = SLIST_NEXT(periph, periph_links);
2740
2741 retval = tr_func(periph, arg);
2742 if (retval == 0)
2743 return(retval);
2744 }
2745
2746 return(retval);
2747 }
2748
2749 static int
2750 xptpdrvtraverse(struct periph_driver **start_pdrv,
2751 xpt_pdrvfunc_t *tr_func, void *arg)
2752 {
2753 struct periph_driver **pdrv;
2754 int retval;
2755
2756 retval = 1;
2757
2758 /*
2759 * We don't traverse the peripheral driver list like we do the
2760 * other lists, because it is a linker set, and therefore cannot be
2761 * changed during runtime. If the peripheral driver list is ever
2762 * re-done to be something other than a linker set (i.e. it can
2763 * change while the system is running), the list traversal should
2764 * be modified to work like the other traversal functions.
2765 */
2766 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2767 *pdrv != NULL; pdrv++) {
2768 retval = tr_func(pdrv, arg);
2769
2770 if (retval == 0)
2771 return(retval);
2772 }
2773
2774 return(retval);
2775 }
2776
2777 static int
2778 xptpdperiphtraverse(struct periph_driver **pdrv,
2779 struct cam_periph *start_periph,
2780 xpt_periphfunc_t *tr_func, void *arg)
2781 {
2782 struct cam_periph *periph, *next_periph;
2783 int retval;
2784
2785 retval = 1;
2786
2787 for (periph = (start_periph ? start_periph :
2788 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2789 periph = next_periph) {
2790
2791 next_periph = TAILQ_NEXT(periph, unit_links);
2792
2793 retval = tr_func(periph, arg);
2794 if (retval == 0)
2795 return(retval);
2796 }
2797 return(retval);
2798 }
2799
2800 static int
2801 xptdefbusfunc(struct cam_eb *bus, void *arg)
2802 {
2803 struct xpt_traverse_config *tr_config;
2804
2805 tr_config = (struct xpt_traverse_config *)arg;
2806
2807 if (tr_config->depth == XPT_DEPTH_BUS) {
2808 xpt_busfunc_t *tr_func;
2809
2810 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2811
2812 return(tr_func(bus, tr_config->tr_arg));
2813 } else
2814 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2815 }
2816
2817 static int
2818 xptdeftargetfunc(struct cam_et *target, void *arg)
2819 {
2820 struct xpt_traverse_config *tr_config;
2821
2822 tr_config = (struct xpt_traverse_config *)arg;
2823
2824 if (tr_config->depth == XPT_DEPTH_TARGET) {
2825 xpt_targetfunc_t *tr_func;
2826
2827 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2828
2829 return(tr_func(target, tr_config->tr_arg));
2830 } else
2831 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2832 }
2833
2834 static int
2835 xptdefdevicefunc(struct cam_ed *device, void *arg)
2836 {
2837 struct xpt_traverse_config *tr_config;
2838
2839 tr_config = (struct xpt_traverse_config *)arg;
2840
2841 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2842 xpt_devicefunc_t *tr_func;
2843
2844 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2845
2846 return(tr_func(device, tr_config->tr_arg));
2847 } else
2848 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2849 }
2850
2851 static int
2852 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2853 {
2854 struct xpt_traverse_config *tr_config;
2855 xpt_periphfunc_t *tr_func;
2856
2857 tr_config = (struct xpt_traverse_config *)arg;
2858
2859 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2860
2861 /*
2862 * Unlike the other default functions, we don't check for depth
2863 * here. The peripheral driver level is the last level in the EDT,
2864 * so if we're here, we should execute the function in question.
2865 */
2866 return(tr_func(periph, tr_config->tr_arg));
2867 }
2868
2869 /*
2870 * Execute the given function for every bus in the EDT.
2871 */
2872 static int
2873 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2874 {
2875 struct xpt_traverse_config tr_config;
2876
2877 tr_config.depth = XPT_DEPTH_BUS;
2878 tr_config.tr_func = tr_func;
2879 tr_config.tr_arg = arg;
2880
2881 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2882 }
2883
2884 /*
2885 * Execute the given function for every device in the EDT.
2886 */
2887 static int
2888 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2889 {
2890 struct xpt_traverse_config tr_config;
2891
2892 tr_config.depth = XPT_DEPTH_DEVICE;
2893 tr_config.tr_func = tr_func;
2894 tr_config.tr_arg = arg;
2895
2896 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2897 }
2898
2899 static int
2900 xptsetasyncfunc(struct cam_ed *device, void *arg)
2901 {
2902 struct cam_path path;
2903 struct ccb_getdev cgd;
2904 struct async_node *cur_entry;
2905
2906 cur_entry = (struct async_node *)arg;
2907
2908 /*
2909 * Don't report unconfigured devices (Wildcard devs,
2910 * devices only for target mode, device instances
2911 * that have been invalidated but are waiting for
2912 * their last reference count to be released).
2913 */
2914 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2915 return (1);
2916
2917 xpt_compile_path(&path,
2918 NULL,
2919 device->target->bus->path_id,
2920 device->target->target_id,
2921 device->lun_id);
2922 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2923 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2924 xpt_action((union ccb *)&cgd);
2925 cur_entry->callback(cur_entry->callback_arg,
2926 AC_FOUND_DEVICE,
2927 &path, &cgd);
2928 xpt_release_path(&path);
2929
2930 return(1);
2931 }
2932
2933 static int
2934 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2935 {
2936 struct cam_path path;
2937 struct ccb_pathinq cpi;
2938 struct async_node *cur_entry;
2939
2940 cur_entry = (struct async_node *)arg;
2941
2942 xpt_compile_path(&path, /*periph*/NULL,
2943 bus->sim->path_id,
2944 CAM_TARGET_WILDCARD,
2945 CAM_LUN_WILDCARD);
2946 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2947 cpi.ccb_h.func_code = XPT_PATH_INQ;
2948 xpt_action((union ccb *)&cpi);
2949 cur_entry->callback(cur_entry->callback_arg,
2950 AC_PATH_REGISTERED,
2951 &path, &cpi);
2952 xpt_release_path(&path);
2953
2954 return(1);
2955 }
2956
2957 static void
2958 xpt_action_sasync_cb(void *context, int pending)
2959 {
2960 struct async_node *cur_entry;
2961 struct xpt_task *task;
2962 uint32_t added;
2963
2964 task = (struct xpt_task *)context;
2965 cur_entry = (struct async_node *)task->data1;
2966 added = task->data2;
2967
2968 if ((added & AC_FOUND_DEVICE) != 0) {
2969 /*
2970 * Get this peripheral up to date with all
2971 * the currently existing devices.
2972 */
2973 xpt_for_all_devices(xptsetasyncfunc, cur_entry);
2974 }
2975 if ((added & AC_PATH_REGISTERED) != 0) {
2976 /*
2977 * Get this peripheral up to date with all
2978 * the currently existing busses.
2979 */
2980 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
2981 }
2982
2983 free(task, M_CAMXPT);
2984 }
2985
2986 void
2987 xpt_action(union ccb *start_ccb)
2988 {
2989
2990 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2991
2992 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2993
2994 switch (start_ccb->ccb_h.func_code) {
2995 case XPT_SCSI_IO:
2996 {
2997 struct cam_ed *device;
2998 #ifdef CAMDEBUG
2999 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3000 struct cam_path *path;
3001
3002 path = start_ccb->ccb_h.path;
3003 #endif
3004
3005 /*
3006 * For the sake of compatibility with SCSI-1
3007 * devices that may not understand the identify
3008 * message, we include lun information in the
3009 * second byte of all commands. SCSI-1 specifies
3010 * that luns are a 3 bit value and reserves only 3
3011 * bits for lun information in the CDB. Later
3012 * revisions of the SCSI spec allow for more than 8
3013 * luns, but have deprecated lun information in the
3014 * CDB. So, if the lun won't fit, we must omit.
3015 *
3016 * Also be aware that during initial probing for devices,
3017 * the inquiry information is unknown but initialized to 0.
3018 * This means that this code will be exercised while probing
3019 * devices with an ANSI revision greater than 2.
3020 */
3021 device = start_ccb->ccb_h.path->device;
3022 if (device->protocol_version <= SCSI_REV_2
3023 && start_ccb->ccb_h.target_lun < 8
3024 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
3025
3026 start_ccb->csio.cdb_io.cdb_bytes[1] |=
3027 start_ccb->ccb_h.target_lun << 5;
3028 }
3029 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
3030 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
3031 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
3032 &path->device->inq_data),
3033 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
3034 cdb_str, sizeof(cdb_str))));
3035 }
3036 /* FALLTHROUGH */
3037 case XPT_TARGET_IO:
3038 case XPT_CONT_TARGET_IO:
3039 start_ccb->csio.sense_resid = 0;
3040 start_ccb->csio.resid = 0;
3041 /* FALLTHROUGH */
3042 case XPT_RESET_DEV:
3043 case XPT_ENG_EXEC:
3044 {
3045 struct cam_path *path;
3046 int runq;
3047
3048 path = start_ccb->ccb_h.path;
3049
3050 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
3051 if (path->device->qfrozen_cnt == 0)
3052 runq = xpt_schedule_dev_sendq(path->bus, path->device);
3053 else
3054 runq = 0;
3055 if (runq != 0)
3056 xpt_run_dev_sendq(path->bus);
3057 break;
3058 }
3059 case XPT_SET_TRAN_SETTINGS:
3060 {
3061 xpt_set_transfer_settings(&start_ccb->cts,
3062 start_ccb->ccb_h.path->device,
3063 /*async_update*/FALSE);
3064 break;
3065 }
3066 case XPT_CALC_GEOMETRY:
3067 {
3068 struct cam_sim *sim;
3069
3070 /* Filter out garbage */
3071 if (start_ccb->ccg.block_size == 0
3072 || start_ccb->ccg.volume_size == 0) {
3073 start_ccb->ccg.cylinders = 0;
3074 start_ccb->ccg.heads = 0;
3075 start_ccb->ccg.secs_per_track = 0;
3076 start_ccb->ccb_h.status = CAM_REQ_CMP;
3077 break;
3078 }
3079 #ifdef PC98
3080 /*
3081 * In a PC-98 system, geometry translation depens on
3082 * the "real" device geometry obtained from mode page 4.
3083 * SCSI geometry translation is performed in the
3084 * initialization routine of the SCSI BIOS and the result
3085 * stored in host memory. If the translation is available
3086 * in host memory, use it. If not, rely on the default
3087 * translation the device driver performs.
3088 */
3089 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
3090 start_ccb->ccb_h.status = CAM_REQ_CMP;
3091 break;
3092 }
3093 #endif
3094 sim = start_ccb->ccb_h.path->bus->sim;
3095 (*(sim->sim_action))(sim, start_ccb);
3096 break;
3097 }
3098 case XPT_ABORT:
3099 {
3100 union ccb* abort_ccb;
3101
3102 abort_ccb = start_ccb->cab.abort_ccb;
3103 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
3104
3105 if (abort_ccb->ccb_h.pinfo.index >= 0) {
3106 struct cam_ccbq *ccbq;
3107
3108 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
3109 cam_ccbq_remove_ccb(ccbq, abort_ccb);
3110 abort_ccb->ccb_h.status =
3111 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3112 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3113 xpt_done(abort_ccb);
3114 start_ccb->ccb_h.status = CAM_REQ_CMP;
3115 break;
3116 }
3117 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
3118 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
3119 /*
3120 * We've caught this ccb en route to
3121 * the SIM. Flag it for abort and the
3122 * SIM will do so just before starting
3123 * real work on the CCB.
3124 */
3125 abort_ccb->ccb_h.status =
3126 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3127 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3128 start_ccb->ccb_h.status = CAM_REQ_CMP;
3129 break;
3130 }
3131 }
3132 if (XPT_FC_IS_QUEUED(abort_ccb)
3133 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
3134 /*
3135 * It's already completed but waiting
3136 * for our SWI to get to it.
3137 */
3138 start_ccb->ccb_h.status = CAM_UA_ABORT;
3139 break;
3140 }
3141 /*
3142 * If we weren't able to take care of the abort request
3143 * in the XPT, pass the request down to the SIM for processing.
3144 */
3145 }
3146 /* FALLTHROUGH */
3147 case XPT_ACCEPT_TARGET_IO:
3148 case XPT_EN_LUN:
3149 case XPT_IMMED_NOTIFY:
3150 case XPT_NOTIFY_ACK:
3151 case XPT_GET_TRAN_SETTINGS:
3152 case XPT_RESET_BUS:
3153 case XPT_IMMEDIATE_NOTIFY:
3154 case XPT_NOTIFY_ACKNOWLEDGE:
3155 case XPT_GET_SIM_KNOB:
3156 case XPT_SET_SIM_KNOB:
3157 {
3158 struct cam_sim *sim;
3159
3160 sim = start_ccb->ccb_h.path->bus->sim;
3161 (*(sim->sim_action))(sim, start_ccb);
3162 break;
3163 }
3164 case XPT_PATH_INQ:
3165 {
3166 struct cam_sim *sim;
3167
3168 sim = start_ccb->ccb_h.path->bus->sim;
3169 (*(sim->sim_action))(sim, start_ccb);
3170 break;
3171 }
3172 case XPT_PATH_STATS:
3173 start_ccb->cpis.last_reset =
3174 start_ccb->ccb_h.path->bus->last_reset;
3175 start_ccb->ccb_h.status = CAM_REQ_CMP;
3176 break;
3177 case XPT_GDEV_TYPE:
3178 {
3179 struct cam_ed *dev;
3180
3181 dev = start_ccb->ccb_h.path->device;
3182 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3183 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3184 } else {
3185 struct ccb_getdev *cgd;
3186 struct cam_eb *bus;
3187 struct cam_et *tar;
3188
3189 cgd = &start_ccb->cgd;
3190 bus = cgd->ccb_h.path->bus;
3191 tar = cgd->ccb_h.path->target;
3192 cgd->inq_data = dev->inq_data;
3193 cgd->ccb_h.status = CAM_REQ_CMP;
3194 cgd->serial_num_len = dev->serial_num_len;
3195 if ((dev->serial_num_len > 0)
3196 && (dev->serial_num != NULL))
3197 bcopy(dev->serial_num, cgd->serial_num,
3198 dev->serial_num_len);
3199 }
3200 break;
3201 }
3202 case XPT_GDEV_STATS:
3203 {
3204 struct cam_ed *dev;
3205
3206 dev = start_ccb->ccb_h.path->device;
3207 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3208 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3209 } else {
3210 struct ccb_getdevstats *cgds;
3211 struct cam_eb *bus;
3212 struct cam_et *tar;
3213
3214 cgds = &start_ccb->cgds;
3215 bus = cgds->ccb_h.path->bus;
3216 tar = cgds->ccb_h.path->target;
3217 cgds->dev_openings = dev->ccbq.dev_openings;
3218 cgds->dev_active = dev->ccbq.dev_active;
3219 cgds->devq_openings = dev->ccbq.devq_openings;
3220 cgds->devq_queued = dev->ccbq.queue.entries;
3221 cgds->held = dev->ccbq.held;
3222 cgds->last_reset = tar->last_reset;
3223 cgds->maxtags = dev->quirk->maxtags;
3224 cgds->mintags = dev->quirk->mintags;
3225 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3226 cgds->last_reset = bus->last_reset;
3227 cgds->ccb_h.status = CAM_REQ_CMP;
3228 }
3229 break;
3230 }
3231 case XPT_GDEVLIST:
3232 {
3233 struct cam_periph *nperiph;
3234 struct periph_list *periph_head;
3235 struct ccb_getdevlist *cgdl;
3236 u_int i;
3237 struct cam_ed *device;
3238 int found;
3239
3240
3241 found = 0;
3242
3243 /*
3244 * Don't want anyone mucking with our data.
3245 */
3246 device = start_ccb->ccb_h.path->device;
3247 periph_head = &device->periphs;
3248 cgdl = &start_ccb->cgdl;
3249
3250 /*
3251 * Check and see if the list has changed since the user
3252 * last requested a list member. If so, tell them that the
3253 * list has changed, and therefore they need to start over
3254 * from the beginning.
3255 */
3256 if ((cgdl->index != 0) &&
3257 (cgdl->generation != device->generation)) {
3258 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3259 break;
3260 }
3261
3262 /*
3263 * Traverse the list of peripherals and attempt to find
3264 * the requested peripheral.
3265 */
3266 for (nperiph = SLIST_FIRST(periph_head), i = 0;
3267 (nperiph != NULL) && (i <= cgdl->index);
3268 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
3269 if (i == cgdl->index) {
3270 strncpy(cgdl->periph_name,
3271 nperiph->periph_name,
3272 DEV_IDLEN);
3273 cgdl->unit_number = nperiph->unit_number;
3274 found = 1;
3275 }
3276 }
3277 if (found == 0) {
3278 cgdl->status = CAM_GDEVLIST_ERROR;
3279 break;
3280 }
3281
3282 if (nperiph == NULL)
3283 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3284 else
3285 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3286
3287 cgdl->index++;
3288 cgdl->generation = device->generation;
3289
3290 cgdl->ccb_h.status = CAM_REQ_CMP;
3291 break;
3292 }
3293 case XPT_DEV_MATCH:
3294 {
3295 dev_pos_type position_type;
3296 struct ccb_dev_match *cdm;
3297
3298 cdm = &start_ccb->cdm;
3299
3300 /*
3301 * There are two ways of getting at information in the EDT.
3302 * The first way is via the primary EDT tree. It starts
3303 * with a list of busses, then a list of targets on a bus,
3304 * then devices/luns on a target, and then peripherals on a
3305 * device/lun. The "other" way is by the peripheral driver
3306 * lists. The peripheral driver lists are organized by
3307 * peripheral driver. (obviously) So it makes sense to
3308 * use the peripheral driver list if the user is looking
3309 * for something like "da1", or all "da" devices. If the
3310 * user is looking for something on a particular bus/target
3311 * or lun, it's generally better to go through the EDT tree.
3312 */
3313
3314 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3315 position_type = cdm->pos.position_type;
3316 else {
3317 u_int i;
3318
3319 position_type = CAM_DEV_POS_NONE;
3320
3321 for (i = 0; i < cdm->num_patterns; i++) {
3322 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3323 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3324 position_type = CAM_DEV_POS_EDT;
3325 break;
3326 }
3327 }
3328
3329 if (cdm->num_patterns == 0)
3330 position_type = CAM_DEV_POS_EDT;
3331 else if (position_type == CAM_DEV_POS_NONE)
3332 position_type = CAM_DEV_POS_PDRV;
3333 }
3334
3335 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3336 case CAM_DEV_POS_EDT:
3337 xptedtmatch(cdm);
3338 break;
3339 case CAM_DEV_POS_PDRV:
3340 xptperiphlistmatch(cdm);
3341 break;
3342 default:
3343 cdm->status = CAM_DEV_MATCH_ERROR;
3344 break;
3345 }
3346
3347 if (cdm->status == CAM_DEV_MATCH_ERROR)
3348 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3349 else
3350 start_ccb->ccb_h.status = CAM_REQ_CMP;
3351
3352 break;
3353 }
3354 case XPT_SASYNC_CB:
3355 {
3356 struct ccb_setasync *csa;
3357 struct async_node *cur_entry;
3358 struct async_list *async_head;
3359 u_int32_t added;
3360
3361 csa = &start_ccb->csa;
3362 added = csa->event_enable;
3363 async_head = &csa->ccb_h.path->device->asyncs;
3364
3365 /*
3366 * If there is already an entry for us, simply
3367 * update it.
3368 */
3369 cur_entry = SLIST_FIRST(async_head);
3370 while (cur_entry != NULL) {
3371 if ((cur_entry->callback_arg == csa->callback_arg)
3372 && (cur_entry->callback == csa->callback))
3373 break;
3374 cur_entry = SLIST_NEXT(cur_entry, links);
3375 }
3376
3377 if (cur_entry != NULL) {
3378 /*
3379 * If the request has no flags set,
3380 * remove the entry.
3381 */
3382 added &= ~cur_entry->event_enable;
3383 if (csa->event_enable == 0) {
3384 SLIST_REMOVE(async_head, cur_entry,
3385 async_node, links);
3386 csa->ccb_h.path->device->refcount--;
3387 free(cur_entry, M_CAMXPT);
3388 } else {
3389 cur_entry->event_enable = csa->event_enable;
3390 }
3391 } else {
3392 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3393 M_NOWAIT);
3394 if (cur_entry == NULL) {
3395 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3396 break;
3397 }
3398 cur_entry->event_enable = csa->event_enable;
3399 cur_entry->callback_arg = csa->callback_arg;
3400 cur_entry->callback = csa->callback;
3401 SLIST_INSERT_HEAD(async_head, cur_entry, links);
3402 csa->ccb_h.path->device->refcount++;
3403 }
3404
3405 /*
3406 * Need to decouple this operation via a taqskqueue so that
3407 * the locking doesn't become a mess.
3408 */
3409 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) {
3410 struct xpt_task *task;
3411
3412 task = malloc(sizeof(struct xpt_task), M_CAMXPT,
3413 M_NOWAIT);
3414 if (task == NULL) {
3415 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3416 break;
3417 }
3418
3419 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task);
3420 task->data1 = cur_entry;
3421 task->data2 = added;
3422 taskqueue_enqueue(taskqueue_thread, &task->task);
3423 }
3424
3425 start_ccb->ccb_h.status = CAM_REQ_CMP;
3426 break;
3427 }
3428 case XPT_REL_SIMQ:
3429 {
3430 struct ccb_relsim *crs;
3431 struct cam_ed *dev;
3432
3433 crs = &start_ccb->crs;
3434 dev = crs->ccb_h.path->device;
3435 if (dev == NULL) {
3436
3437 crs->ccb_h.status = CAM_DEV_NOT_THERE;
3438 break;
3439 }
3440
3441 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3442
3443 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) {
3444 /* Don't ever go below one opening */
3445 if (crs->openings > 0) {
3446 xpt_dev_ccbq_resize(crs->ccb_h.path,
3447 crs->openings);
3448
3449 if (bootverbose) {
3450 xpt_print(crs->ccb_h.path,
3451 "tagged openings now %d\n",
3452 crs->openings);
3453 }
3454 }
3455 }
3456 }
3457
3458 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3459
3460 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3461
3462 /*
3463 * Just extend the old timeout and decrement
3464 * the freeze count so that a single timeout
3465 * is sufficient for releasing the queue.
3466 */
3467 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3468 callout_stop(&dev->callout);
3469 } else {
3470
3471 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3472 }
3473
3474 callout_reset(&dev->callout,
3475 (crs->release_timeout * hz) / 1000,
3476 xpt_release_devq_timeout, dev);
3477
3478 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3479
3480 }
3481
3482 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3483
3484 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3485 /*
3486 * Decrement the freeze count so that a single
3487 * completion is still sufficient to unfreeze
3488 * the queue.
3489 */
3490 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3491 } else {
3492
3493 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3494 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3495 }
3496 }
3497
3498 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3499
3500 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3501 || (dev->ccbq.dev_active == 0)) {
3502
3503 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3504 } else {
3505
3506 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3507 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3508 }
3509 }
3510
3511 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3512
3513 xpt_release_devq(crs->ccb_h.path, /*count*/1,
3514 /*run_queue*/TRUE);
3515 }
3516 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3517 start_ccb->ccb_h.status = CAM_REQ_CMP;
3518 break;
3519 }
3520 case XPT_SCAN_BUS:
3521 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3522 break;
3523 case XPT_SCAN_LUN:
3524 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3525 start_ccb->ccb_h.path, start_ccb->crcn.flags,
3526 start_ccb);
3527 break;
3528 case XPT_DEBUG: {
3529 #ifdef CAMDEBUG
3530 #ifdef CAM_DEBUG_DELAY
3531 cam_debug_delay = CAM_DEBUG_DELAY;
3532 #endif
3533 cam_dflags = start_ccb->cdbg.flags;
3534 if (cam_dpath != NULL) {
3535 xpt_free_path(cam_dpath);
3536 cam_dpath = NULL;
3537 }
3538
3539 if (cam_dflags != CAM_DEBUG_NONE) {
3540 if (xpt_create_path(&cam_dpath, xpt_periph,
3541 start_ccb->ccb_h.path_id,
3542 start_ccb->ccb_h.target_id,
3543 start_ccb->ccb_h.target_lun) !=
3544 CAM_REQ_CMP) {
3545 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3546 cam_dflags = CAM_DEBUG_NONE;
3547 } else {
3548 start_ccb->ccb_h.status = CAM_REQ_CMP;
3549 xpt_print(cam_dpath, "debugging flags now %x\n",
3550 cam_dflags);
3551 }
3552 } else {
3553 cam_dpath = NULL;
3554 start_ccb->ccb_h.status = CAM_REQ_CMP;
3555 }
3556 #else /* !CAMDEBUG */
3557 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3558 #endif /* CAMDEBUG */
3559 break;
3560 }
3561 case XPT_NOOP:
3562 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3563 xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3564 start_ccb->ccb_h.status = CAM_REQ_CMP;
3565 break;
3566 default:
3567 case XPT_SDEV_TYPE:
3568 case XPT_TERM_IO:
3569 case XPT_ENG_INQ:
3570 /* XXX Implement */
3571 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3572 break;
3573 }
3574 }
3575
3576 void
3577 xpt_polled_action(union ccb *start_ccb)
3578 {
3579 u_int32_t timeout;
3580 struct cam_sim *sim;
3581 struct cam_devq *devq;
3582 struct cam_ed *dev;
3583
3584
3585 timeout = start_ccb->ccb_h.timeout;
3586 sim = start_ccb->ccb_h.path->bus->sim;
3587 devq = sim->devq;
3588 dev = start_ccb->ccb_h.path->device;
3589
3590 mtx_assert(sim->mtx, MA_OWNED);
3591
3592 /*
3593 * Steal an opening so that no other queued requests
3594 * can get it before us while we simulate interrupts.
3595 */
3596 dev->ccbq.devq_openings--;
3597 dev->ccbq.dev_openings--;
3598
3599 while(((devq != NULL && devq->send_openings <= 0) ||
3600 dev->ccbq.dev_openings < 0) && (--timeout > 0)) {
3601 DELAY(1000);
3602 (*(sim->sim_poll))(sim);
3603 camisr_runqueue(&sim->sim_doneq);
3604 }
3605
3606 dev->ccbq.devq_openings++;
3607 dev->ccbq.dev_openings++;
3608
3609 if (timeout != 0) {
3610 xpt_action(start_ccb);
3611 while(--timeout > 0) {
3612 (*(sim->sim_poll))(sim);
3613 camisr_runqueue(&sim->sim_doneq);
3614 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3615 != CAM_REQ_INPROG)
3616 break;
3617 DELAY(1000);
3618 }
3619 if (timeout == 0) {
3620 /*
3621 * XXX Is it worth adding a sim_timeout entry
3622 * point so we can attempt recovery? If
3623 * this is only used for dumps, I don't think
3624 * it is.
3625 */
3626 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3627 }
3628 } else {
3629 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3630 }
3631 }
3632
3633 /*
3634 * Schedule a peripheral driver to receive a ccb when it's
3635 * target device has space for more transactions.
3636 */
3637 void
3638 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3639 {
3640 struct cam_ed *device;
3641 int runq;
3642
3643 mtx_assert(perph->sim->mtx, MA_OWNED);
3644
3645 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3646 device = perph->path->device;
3647 if (periph_is_queued(perph)) {
3648 /* Simply reorder based on new priority */
3649 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3650 (" change priority to %d\n", new_priority));
3651 if (new_priority < perph->pinfo.priority) {
3652 camq_change_priority(&device->drvq,
3653 perph->pinfo.index,
3654 new_priority);
3655 }
3656 runq = 0;
3657 } else {
3658 /* New entry on the queue */
3659 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3660 (" added periph to queue\n"));
3661 perph->pinfo.priority = new_priority;
3662 perph->pinfo.generation = ++device->drvq.generation;
3663 camq_insert(&device->drvq, &perph->pinfo);
3664 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3665 }
3666 if (runq != 0) {
3667 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3668 (" calling xpt_run_devq\n"));
3669 xpt_run_dev_allocq(perph->path->bus);
3670 }
3671 }
3672
3673
3674 /*
3675 * Schedule a device to run on a given queue.
3676 * If the device was inserted as a new entry on the queue,
3677 * return 1 meaning the device queue should be run. If we
3678 * were already queued, implying someone else has already
3679 * started the queue, return 0 so the caller doesn't attempt
3680 * to run the queue.
3681 */
3682 static int
3683 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3684 u_int32_t new_priority)
3685 {
3686 int retval;
3687 u_int32_t old_priority;
3688
3689 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3690
3691 old_priority = pinfo->priority;
3692
3693 /*
3694 * Are we already queued?
3695 */
3696 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3697 /* Simply reorder based on new priority */
3698 if (new_priority < old_priority) {
3699 camq_change_priority(queue, pinfo->index,
3700 new_priority);
3701 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3702 ("changed priority to %d\n",
3703 new_priority));
3704 }
3705 retval = 0;
3706 } else {
3707 /* New entry on the queue */
3708 if (new_priority < old_priority)
3709 pinfo->priority = new_priority;
3710
3711 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3712 ("Inserting onto queue\n"));
3713 pinfo->generation = ++queue->generation;
3714 camq_insert(queue, pinfo);
3715 retval = 1;
3716 }
3717 return (retval);
3718 }
3719
3720 static void
3721 xpt_run_dev_allocq(struct cam_eb *bus)
3722 {
3723 struct cam_devq *devq;
3724
3725 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3726 devq = bus->sim->devq;
3727
3728 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3729 (" qfrozen_cnt == 0x%x, entries == %d, "
3730 "openings == %d, active == %d\n",
3731 devq->alloc_queue.qfrozen_cnt,
3732 devq->alloc_queue.entries,
3733 devq->alloc_openings,
3734 devq->alloc_active));
3735
3736 devq->alloc_queue.qfrozen_cnt++;
3737 while ((devq->alloc_queue.entries > 0)
3738 && (devq->alloc_openings > 0)
3739 && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3740 struct cam_ed_qinfo *qinfo;
3741 struct cam_ed *device;
3742 union ccb *work_ccb;
3743 struct cam_periph *drv;
3744 struct camq *drvq;
3745
3746 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3747 CAMQ_HEAD);
3748 device = qinfo->device;
3749
3750 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3751 ("running device %p\n", device));
3752
3753 drvq = &device->drvq;
3754
3755 #ifdef CAMDEBUG
3756 if (drvq->entries <= 0) {
3757 panic("xpt_run_dev_allocq: "
3758 "Device on queue without any work to do");
3759 }
3760 #endif
3761 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3762 devq->alloc_openings--;
3763 devq->alloc_active++;
3764 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3765 xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3766 drv->pinfo.priority);
3767 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3768 ("calling periph start\n"));
3769 drv->periph_start(drv, work_ccb);
3770 } else {
3771 /*
3772 * Malloc failure in alloc_ccb
3773 */
3774 /*
3775 * XXX add us to a list to be run from free_ccb
3776 * if we don't have any ccbs active on this
3777 * device queue otherwise we may never get run
3778 * again.
3779 */
3780 break;
3781 }
3782
3783 if (drvq->entries > 0) {
3784 /* We have more work. Attempt to reschedule */
3785 xpt_schedule_dev_allocq(bus, device);
3786 }
3787 }
3788 devq->alloc_queue.qfrozen_cnt--;
3789 }
3790
3791 static void
3792 xpt_run_dev_sendq(struct cam_eb *bus)
3793 {
3794 struct cam_devq *devq;
3795
3796 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3797
3798 devq = bus->sim->devq;
3799
3800 devq->send_queue.qfrozen_cnt++;
3801 while ((devq->send_queue.entries > 0)
3802 && (devq->send_openings > 0)) {
3803 struct cam_ed_qinfo *qinfo;
3804 struct cam_ed *device;
3805 union ccb *work_ccb;
3806 struct cam_sim *sim;
3807
3808 if (devq->send_queue.qfrozen_cnt > 1) {
3809 break;
3810 }
3811
3812 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3813 CAMQ_HEAD);
3814 device = qinfo->device;
3815
3816 /*
3817 * If the device has been "frozen", don't attempt
3818 * to run it.
3819 */
3820 if (device->qfrozen_cnt > 0) {
3821 continue;
3822 }
3823
3824 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3825 ("running device %p\n", device));
3826
3827 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3828 if (work_ccb == NULL) {
3829 printf("device on run queue with no ccbs???\n");
3830 continue;
3831 }
3832
3833 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3834
3835 mtx_lock(&xsoftc.xpt_lock);
3836 if (xsoftc.num_highpower <= 0) {
3837 /*
3838 * We got a high power command, but we
3839 * don't have any available slots. Freeze
3840 * the device queue until we have a slot
3841 * available.
3842 */
3843 device->qfrozen_cnt++;
3844 STAILQ_INSERT_TAIL(&xsoftc.highpowerq,
3845 &work_ccb->ccb_h,
3846 xpt_links.stqe);
3847
3848 mtx_unlock(&xsoftc.xpt_lock);
3849 continue;
3850 } else {
3851 /*
3852 * Consume a high power slot while
3853 * this ccb runs.
3854 */
3855 xsoftc.num_highpower--;
3856 }
3857 mtx_unlock(&xsoftc.xpt_lock);
3858 }
3859 devq->active_dev = device;
3860 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3861
3862 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3863
3864 devq->send_openings--;
3865 devq->send_active++;
3866
3867 if (device->ccbq.queue.entries > 0)
3868 xpt_schedule_dev_sendq(bus, device);
3869
3870 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3871 /*
3872 * The client wants to freeze the queue
3873 * after this CCB is sent.
3874 */
3875 device->qfrozen_cnt++;
3876 }
3877
3878 /* In Target mode, the peripheral driver knows best... */
3879 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3880 if ((device->inq_flags & SID_CmdQue) != 0
3881 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3882 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3883 else
3884 /*
3885 * Clear this in case of a retried CCB that
3886 * failed due to a rejected tag.
3887 */
3888 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3889 }
3890
3891 /*
3892 * Device queues can be shared among multiple sim instances
3893 * that reside on different busses. Use the SIM in the queue
3894 * CCB's path, rather than the one in the bus that was passed
3895 * into this function.
3896 */
3897 sim = work_ccb->ccb_h.path->bus->sim;
3898 (*(sim->sim_action))(sim, work_ccb);
3899
3900 devq->active_dev = NULL;
3901 }
3902 devq->send_queue.qfrozen_cnt--;
3903 }
3904
3905 /*
3906 * This function merges stuff from the slave ccb into the master ccb, while
3907 * keeping important fields in the master ccb constant.
3908 */
3909 void
3910 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3911 {
3912
3913 /*
3914 * Pull fields that are valid for peripheral drivers to set
3915 * into the master CCB along with the CCB "payload".
3916 */
3917 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3918 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3919 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3920 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3921 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3922 sizeof(union ccb) - sizeof(struct ccb_hdr));
3923 }
3924
3925 void
3926 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3927 {
3928
3929 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3930 ccb_h->pinfo.priority = priority;
3931 ccb_h->path = path;
3932 ccb_h->path_id = path->bus->path_id;
3933 if (path->target)
3934 ccb_h->target_id = path->target->target_id;
3935 else
3936 ccb_h->target_id = CAM_TARGET_WILDCARD;
3937 if (path->device) {
3938 ccb_h->target_lun = path->device->lun_id;
3939 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3940 } else {
3941 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3942 }
3943 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3944 ccb_h->flags = 0;
3945 }
3946
3947 /* Path manipulation functions */
3948 cam_status
3949 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3950 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3951 {
3952 struct cam_path *path;
3953 cam_status status;
3954
3955 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT);
3956
3957 if (path == NULL) {
3958 status = CAM_RESRC_UNAVAIL;
3959 return(status);
3960 }
3961 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3962 if (status != CAM_REQ_CMP) {
3963 free(path, M_CAMXPT);
3964 path = NULL;
3965 }
3966 *new_path_ptr = path;
3967 return (status);
3968 }
3969
3970 cam_status
3971 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3972 struct cam_periph *periph, path_id_t path_id,
3973 target_id_t target_id, lun_id_t lun_id)
3974 {
3975 struct cam_path *path;
3976 struct cam_eb *bus = NULL;
3977 cam_status status;
3978 int need_unlock = 0;
3979
3980 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_WAITOK);
3981
3982 if (path_id != CAM_BUS_WILDCARD) {
3983 bus = xpt_find_bus(path_id);
3984 if (bus != NULL) {
3985 need_unlock = 1;
3986 CAM_SIM_LOCK(bus->sim);
3987 }
3988 }
3989 status = xpt_compile_path(path, periph, path_id, target_id, lun_id);
3990 if (need_unlock)
3991 CAM_SIM_UNLOCK(bus->sim);
3992 if (status != CAM_REQ_CMP) {
3993 free(path, M_CAMXPT);
3994 path = NULL;
3995 }
3996 *new_path_ptr = path;
3997 return (status);
3998 }
3999
4000 static cam_status
4001 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
4002 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
4003 {
4004 struct cam_eb *bus;
4005 struct cam_et *target;
4006 struct cam_ed *device;
4007 cam_status status;
4008
4009 status = CAM_REQ_CMP; /* Completed without error */
4010 target = NULL; /* Wildcarded */
4011 device = NULL; /* Wildcarded */
4012
4013 /*
4014 * We will potentially modify the EDT, so block interrupts
4015 * that may attempt to create cam paths.
4016 */
4017 bus = xpt_find_bus(path_id);
4018 if (bus == NULL) {
4019 status = CAM_PATH_INVALID;
4020 } else {
4021 target = xpt_find_target(bus, target_id);
4022 if (target == NULL) {
4023 /* Create one */
4024 struct cam_et *new_target;
4025
4026 new_target = xpt_alloc_target(bus, target_id);
4027 if (new_target == NULL) {
4028 status = CAM_RESRC_UNAVAIL;
4029 } else {
4030 target = new_target;
4031 }
4032 }
4033 if (target != NULL) {
4034 device = xpt_find_device(target, lun_id);
4035 if (device == NULL) {
4036 /* Create one */
4037 struct cam_ed *new_device;
4038
4039 new_device = xpt_alloc_device(bus,
4040 target,
4041 lun_id);
4042 if (new_device == NULL) {
4043 status = CAM_RESRC_UNAVAIL;
4044 } else {
4045 device = new_device;
4046 }
4047 }
4048 }
4049 }
4050
4051 /*
4052 * Only touch the user's data if we are successful.
4053 */
4054 if (status == CAM_REQ_CMP) {
4055 new_path->periph = perph;
4056 new_path->bus = bus;
4057 new_path->target = target;
4058 new_path->device = device;
4059 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
4060 } else {
4061 if (device != NULL)
4062 xpt_release_device(bus, target, device);
4063 if (target != NULL)
4064 xpt_release_target(bus, target);
4065 if (bus != NULL)
4066 xpt_release_bus(bus);
4067 }
4068 return (status);
4069 }
4070
4071 static void
4072 xpt_release_path(struct cam_path *path)
4073 {
4074 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
4075 if (path->device != NULL) {
4076 xpt_release_device(path->bus, path->target, path->device);
4077 path->device = NULL;
4078 }
4079 if (path->target != NULL) {
4080 xpt_release_target(path->bus, path->target);
4081 path->target = NULL;
4082 }
4083 if (path->bus != NULL) {
4084 xpt_release_bus(path->bus);
4085 path->bus = NULL;
4086 }
4087 }
4088
4089 void
4090 xpt_free_path(struct cam_path *path)
4091 {
4092
4093 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
4094 xpt_release_path(path);
4095 free(path, M_CAMXPT);
4096 }
4097
4098
4099 /*
4100 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
4101 * in path1, 2 for match with wildcards in path2.
4102 */
4103 int
4104 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
4105 {
4106 int retval = 0;
4107
4108 if (path1->bus != path2->bus) {
4109 if (path1->bus->path_id == CAM_BUS_WILDCARD)
4110 retval = 1;
4111 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
4112 retval = 2;
4113 else
4114 return (-1);
4115 }
4116 if (path1->target != path2->target) {
4117 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
4118 if (retval == 0)
4119 retval = 1;
4120 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
4121 retval = 2;
4122 else
4123 return (-1);
4124 }
4125 if (path1->device != path2->device) {
4126 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
4127 if (retval == 0)
4128 retval = 1;
4129 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
4130 retval = 2;
4131 else
4132 return (-1);
4133 }
4134 return (retval);
4135 }
4136
4137 void
4138 xpt_print_path(struct cam_path *path)
4139 {
4140
4141 if (path == NULL)
4142 printf("(nopath): ");
4143 else {
4144 if (path->periph != NULL)
4145 printf("(%s%d:", path->periph->periph_name,
4146 path->periph->unit_number);
4147 else
4148 printf("(noperiph:");
4149
4150 if (path->bus != NULL)
4151 printf("%s%d:%d:", path->bus->sim->sim_name,
4152 path->bus->sim->unit_number,
4153 path->bus->sim->bus_id);
4154 else
4155 printf("nobus:");
4156
4157 if (path->target != NULL)
4158 printf("%d:", path->target->target_id);
4159 else
4160 printf("X:");
4161
4162 if (path->device != NULL)
4163 printf("%d): ", path->device->lun_id);
4164 else
4165 printf("X): ");
4166 }
4167 }
4168
4169 void
4170 xpt_print(struct cam_path *path, const char *fmt, ...)
4171 {
4172 va_list ap;
4173 xpt_print_path(path);
4174 va_start(ap, fmt);
4175 vprintf(fmt, ap);
4176 va_end(ap);
4177 }
4178
4179 int
4180 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
4181 {
4182 struct sbuf sb;
4183
4184 #ifdef INVARIANTS
4185 if (path != NULL && path->bus != NULL)
4186 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4187 #endif
4188
4189 sbuf_new(&sb, str, str_len, 0);
4190
4191 if (path == NULL)
4192 sbuf_printf(&sb, "(nopath): ");
4193 else {
4194 if (path->periph != NULL)
4195 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
4196 path->periph->unit_number);
4197 else
4198 sbuf_printf(&sb, "(noperiph:");
4199
4200 if (path->bus != NULL)
4201 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
4202 path->bus->sim->unit_number,
4203 path->bus->sim->bus_id);
4204 else
4205 sbuf_printf(&sb, "nobus:");
4206
4207 if (path->target != NULL)
4208 sbuf_printf(&sb, "%d:", path->target->target_id);
4209 else
4210 sbuf_printf(&sb, "X:");
4211
4212 if (path->device != NULL)
4213 sbuf_printf(&sb, "%d): ", path->device->lun_id);
4214 else
4215 sbuf_printf(&sb, "X): ");
4216 }
4217 sbuf_finish(&sb);
4218
4219 return(sbuf_len(&sb));
4220 }
4221
4222 path_id_t
4223 xpt_path_path_id(struct cam_path *path)
4224 {
4225 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4226
4227 return(path->bus->path_id);
4228 }
4229
4230 target_id_t
4231 xpt_path_target_id(struct cam_path *path)
4232 {
4233 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4234
4235 if (path->target != NULL)
4236 return (path->target->target_id);
4237 else
4238 return (CAM_TARGET_WILDCARD);
4239 }
4240
4241 lun_id_t
4242 xpt_path_lun_id(struct cam_path *path)
4243 {
4244 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4245
4246 if (path->device != NULL)
4247 return (path->device->lun_id);
4248 else
4249 return (CAM_LUN_WILDCARD);
4250 }
4251
4252 struct cam_sim *
4253 xpt_path_sim(struct cam_path *path)
4254 {
4255
4256 return (path->bus->sim);
4257 }
4258
4259 struct cam_periph*
4260 xpt_path_periph(struct cam_path *path)
4261 {
4262 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4263
4264 return (path->periph);
4265 }
4266
4267 /*
4268 * Release a CAM control block for the caller. Remit the cost of the structure
4269 * to the device referenced by the path. If the this device had no 'credits'
4270 * and peripheral drivers have registered async callbacks for this notification
4271 * call them now.
4272 */
4273 void
4274 xpt_release_ccb(union ccb *free_ccb)
4275 {
4276 struct cam_path *path;
4277 struct cam_ed *device;
4278 struct cam_eb *bus;
4279 struct cam_sim *sim;
4280
4281 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4282 path = free_ccb->ccb_h.path;
4283 device = path->device;
4284 bus = path->bus;
4285 sim = bus->sim;
4286
4287 mtx_assert(sim->mtx, MA_OWNED);
4288
4289 cam_ccbq_release_opening(&device->ccbq);
4290 if (sim->ccb_count > sim->max_ccbs) {
4291 xpt_free_ccb(free_ccb);
4292 sim->ccb_count--;
4293 } else {
4294 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h,
4295 xpt_links.sle);
4296 }
4297 if (sim->devq == NULL) {
4298 return;
4299 }
4300 sim->devq->alloc_openings++;
4301 sim->devq->alloc_active--;
4302 /* XXX Turn this into an inline function - xpt_run_device?? */
4303 if ((device_is_alloc_queued(device) == 0)
4304 && (device->drvq.entries > 0)) {
4305 xpt_schedule_dev_allocq(bus, device);
4306 }
4307 if (dev_allocq_is_runnable(sim->devq))
4308 xpt_run_dev_allocq(bus);
4309 }
4310
4311 /* Functions accessed by SIM drivers */
4312
4313 /*
4314 * A sim structure, listing the SIM entry points and instance
4315 * identification info is passed to xpt_bus_register to hook the SIM
4316 * into the CAM framework. xpt_bus_register creates a cam_eb entry
4317 * for this new bus and places it in the array of busses and assigns
4318 * it a path_id. The path_id may be influenced by "hard wiring"
4319 * information specified by the user. Once interrupt services are
4320 * available, the bus will be probed.
4321 */
4322 int32_t
4323 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4324 {
4325 struct cam_eb *new_bus;
4326 struct cam_eb *old_bus;
4327 struct ccb_pathinq cpi;
4328
4329 mtx_assert(sim->mtx, MA_OWNED);
4330
4331 sim->bus_id = bus;
4332 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4333 M_CAMXPT, M_NOWAIT);
4334 if (new_bus == NULL) {
4335 /* Couldn't satisfy request */
4336 return (CAM_RESRC_UNAVAIL);
4337 }
4338
4339 if (strcmp(sim->sim_name, "xpt") != 0) {
4340
4341 sim->path_id =
4342 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4343 }
4344
4345 TAILQ_INIT(&new_bus->et_entries);
4346 new_bus->path_id = sim->path_id;
4347 cam_sim_hold(sim);
4348 new_bus->sim = sim;
4349 timevalclear(&new_bus->last_reset);
4350 new_bus->flags = 0;
4351 new_bus->refcount = 1; /* Held until a bus_deregister event */
4352 new_bus->generation = 0;
4353 mtx_lock(&xsoftc.xpt_topo_lock);
4354 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4355 while (old_bus != NULL
4356 && old_bus->path_id < new_bus->path_id)
4357 old_bus = TAILQ_NEXT(old_bus, links);
4358 if (old_bus != NULL)
4359 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4360 else
4361 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4362 xsoftc.bus_generation++;
4363 mtx_unlock(&xsoftc.xpt_topo_lock);
4364
4365 /* Notify interested parties */
4366 if (sim->path_id != CAM_XPT_PATH_ID) {
4367 struct cam_path path;
4368
4369 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4370 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4371 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4372 cpi.ccb_h.func_code = XPT_PATH_INQ;
4373 xpt_action((union ccb *)&cpi);
4374 xpt_async(AC_PATH_REGISTERED, &path, &cpi);
4375 xpt_release_path(&path);
4376 }
4377 return (CAM_SUCCESS);
4378 }
4379
4380 int32_t
4381 xpt_bus_deregister(path_id_t pathid)
4382 {
4383 struct cam_path bus_path;
4384 cam_status status;
4385
4386 status = xpt_compile_path(&bus_path, NULL, pathid,
4387 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4388 if (status != CAM_REQ_CMP)
4389 return (status);
4390
4391 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4392 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4393
4394 /* Release the reference count held while registered. */
4395 xpt_release_bus(bus_path.bus);
4396 xpt_release_path(&bus_path);
4397
4398 return (CAM_REQ_CMP);
4399 }
4400
4401 static path_id_t
4402 xptnextfreepathid(void)
4403 {
4404 struct cam_eb *bus;
4405 path_id_t pathid;
4406 const char *strval;
4407
4408 pathid = 0;
4409 mtx_lock(&xsoftc.xpt_topo_lock);
4410 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4411 retry:
4412 /* Find an unoccupied pathid */
4413 while (bus != NULL && bus->path_id <= pathid) {
4414 if (bus->path_id == pathid)
4415 pathid++;
4416 bus = TAILQ_NEXT(bus, links);
4417 }
4418 mtx_unlock(&xsoftc.xpt_topo_lock);
4419
4420 /*
4421 * Ensure that this pathid is not reserved for
4422 * a bus that may be registered in the future.
4423 */
4424 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4425 ++pathid;
4426 /* Start the search over */
4427 mtx_lock(&xsoftc.xpt_topo_lock);
4428 goto retry;
4429 }
4430 return (pathid);
4431 }
4432
4433 static path_id_t
4434 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4435 {
4436 path_id_t pathid;
4437 int i, dunit, val;
4438 char buf[32];
4439 const char *dname;
4440
4441 pathid = CAM_XPT_PATH_ID;
4442 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4443 i = 0;
4444 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4445 if (strcmp(dname, "scbus")) {
4446 /* Avoid a bit of foot shooting. */
4447 continue;
4448 }
4449 if (dunit < 0) /* unwired?! */
4450 continue;
4451 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4452 if (sim_bus == val) {
4453 pathid = dunit;
4454 break;
4455 }
4456 } else if (sim_bus == 0) {
4457 /* Unspecified matches bus 0 */
4458 pathid = dunit;
4459 break;
4460 } else {
4461 printf("Ambiguous scbus configuration for %s%d "
4462 "bus %d, cannot wire down. The kernel "
4463 "config entry for scbus%d should "
4464 "specify a controller bus.\n"
4465 "Scbus will be assigned dynamically.\n",
4466 sim_name, sim_unit, sim_bus, dunit);
4467 break;
4468 }
4469 }
4470
4471 if (pathid == CAM_XPT_PATH_ID)
4472 pathid = xptnextfreepathid();
4473 return (pathid);
4474 }
4475
4476 void
4477 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4478 {
4479 struct cam_eb *bus;
4480 struct cam_et *target, *next_target;
4481 struct cam_ed *device, *next_device;
4482
4483 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4484
4485 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4486
4487 /*
4488 * Most async events come from a CAM interrupt context. In
4489 * a few cases, the error recovery code at the peripheral layer,
4490 * which may run from our SWI or a process context, may signal
4491 * deferred events with a call to xpt_async.
4492 */
4493
4494 bus = path->bus;
4495
4496 if (async_code == AC_BUS_RESET) {
4497 /* Update our notion of when the last reset occurred */
4498 microtime(&bus->last_reset);
4499 }
4500
4501 for (target = TAILQ_FIRST(&bus->et_entries);
4502 target != NULL;
4503 target = next_target) {
4504
4505 next_target = TAILQ_NEXT(target, links);
4506
4507 if (path->target != target
4508 && path->target->target_id != CAM_TARGET_WILDCARD
4509 && target->target_id != CAM_TARGET_WILDCARD)
4510 continue;
4511
4512 if (async_code == AC_SENT_BDR) {
4513 /* Update our notion of when the last reset occurred */
4514 microtime(&path->target->last_reset);
4515 }
4516
4517 for (device = TAILQ_FIRST(&target->ed_entries);
4518 device != NULL;
4519 device = next_device) {
4520
4521 next_device = TAILQ_NEXT(device, links);
4522
4523 if (path->device != device
4524 && path->device->lun_id != CAM_LUN_WILDCARD
4525 && device->lun_id != CAM_LUN_WILDCARD)
4526 continue;
4527
4528 xpt_dev_async(async_code, bus, target,
4529 device, async_arg);
4530
4531 xpt_async_bcast(&device->asyncs, async_code,
4532 path, async_arg);
4533 }
4534 }
4535
4536 /*
4537 * If this wasn't a fully wildcarded async, tell all
4538 * clients that want all async events.
4539 */
4540 if (bus != xpt_periph->path->bus)
4541 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4542 path, async_arg);
4543 }
4544
4545 static void
4546 xpt_async_bcast(struct async_list *async_head,
4547 u_int32_t async_code,
4548 struct cam_path *path, void *async_arg)
4549 {
4550 struct async_node *cur_entry;
4551
4552 cur_entry = SLIST_FIRST(async_head);
4553 while (cur_entry != NULL) {
4554 struct async_node *next_entry;
4555 /*
4556 * Grab the next list entry before we call the current
4557 * entry's callback. This is because the callback function
4558 * can delete its async callback entry.
4559 */
4560 next_entry = SLIST_NEXT(cur_entry, links);
4561 if ((cur_entry->event_enable & async_code) != 0)
4562 cur_entry->callback(cur_entry->callback_arg,
4563 async_code, path,
4564 async_arg);
4565 cur_entry = next_entry;
4566 }
4567 }
4568
4569 /*
4570 * Handle any per-device event notifications that require action by the XPT.
4571 */
4572 static void
4573 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4574 struct cam_ed *device, void *async_arg)
4575 {
4576 cam_status status;
4577 struct cam_path newpath;
4578
4579 /*
4580 * We only need to handle events for real devices.
4581 */
4582 if (target->target_id == CAM_TARGET_WILDCARD
4583 || device->lun_id == CAM_LUN_WILDCARD)
4584 return;
4585
4586 /*
4587 * We need our own path with wildcards expanded to
4588 * handle certain types of events.
4589 */
4590 if ((async_code == AC_SENT_BDR)
4591 || (async_code == AC_BUS_RESET)
4592 || (async_code == AC_INQ_CHANGED))
4593 status = xpt_compile_path(&newpath, NULL,
4594 bus->path_id,
4595 target->target_id,
4596 device->lun_id);
4597 else
4598 status = CAM_REQ_CMP_ERR;
4599
4600 if (status == CAM_REQ_CMP) {
4601
4602 /*
4603 * Allow transfer negotiation to occur in a
4604 * tag free environment.
4605 */
4606 if (async_code == AC_SENT_BDR
4607 || async_code == AC_BUS_RESET)
4608 xpt_toggle_tags(&newpath);
4609
4610 if (async_code == AC_INQ_CHANGED) {
4611 /*
4612 * We've sent a start unit command, or
4613 * something similar to a device that
4614 * may have caused its inquiry data to
4615 * change. So we re-scan the device to
4616 * refresh the inquiry data for it.
4617 */
4618 xpt_scan_lun(newpath.periph, &newpath,
4619 CAM_EXPECT_INQ_CHANGE, NULL);
4620 }
4621 xpt_release_path(&newpath);
4622 } else if (async_code == AC_LOST_DEVICE) {
4623 device->flags |= CAM_DEV_UNCONFIGURED;
4624 } else if (async_code == AC_TRANSFER_NEG) {
4625 struct ccb_trans_settings *settings;
4626
4627 settings = (struct ccb_trans_settings *)async_arg;
4628 xpt_set_transfer_settings(settings, device,
4629 /*async_update*/TRUE);
4630 }
4631 }
4632
4633 u_int32_t
4634 xpt_freeze_devq(struct cam_path *path, u_int count)
4635 {
4636 struct ccb_hdr *ccbh;
4637
4638 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4639
4640 path->device->qfrozen_cnt += count;
4641
4642 /*
4643 * Mark the last CCB in the queue as needing
4644 * to be requeued if the driver hasn't
4645 * changed it's state yet. This fixes a race
4646 * where a ccb is just about to be queued to
4647 * a controller driver when it's interrupt routine
4648 * freezes the queue. To completly close the
4649 * hole, controller drives must check to see
4650 * if a ccb's status is still CAM_REQ_INPROG
4651 * just before they queue
4652 * the CCB. See ahc_action/ahc_freeze_devq for
4653 * an example.
4654 */
4655 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4656 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4657 ccbh->status = CAM_REQUEUE_REQ;
4658 return (path->device->qfrozen_cnt);
4659 }
4660
4661 u_int32_t
4662 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4663 {
4664 mtx_assert(sim->mtx, MA_OWNED);
4665
4666 sim->devq->send_queue.qfrozen_cnt += count;
4667 if (sim->devq->active_dev != NULL) {
4668 struct ccb_hdr *ccbh;
4669
4670 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4671 ccb_hdr_tailq);
4672 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4673 ccbh->status = CAM_REQUEUE_REQ;
4674 }
4675 return (sim->devq->send_queue.qfrozen_cnt);
4676 }
4677
4678 static void
4679 xpt_release_devq_timeout(void *arg)
4680 {
4681 struct cam_ed *device;
4682
4683 device = (struct cam_ed *)arg;
4684
4685 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4686 }
4687
4688 void
4689 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4690 {
4691 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4692
4693 xpt_release_devq_device(path->device, count, run_queue);
4694 }
4695
4696 static void
4697 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4698 {
4699 int rundevq;
4700
4701 rundevq = 0;
4702 if (dev->qfrozen_cnt > 0) {
4703
4704 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4705 dev->qfrozen_cnt -= count;
4706 if (dev->qfrozen_cnt == 0) {
4707
4708 /*
4709 * No longer need to wait for a successful
4710 * command completion.
4711 */
4712 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4713
4714 /*
4715 * Remove any timeouts that might be scheduled
4716 * to release this queue.
4717 */
4718 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4719 callout_stop(&dev->callout);
4720 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4721 }
4722
4723 /*
4724 * Now that we are unfrozen schedule the
4725 * device so any pending transactions are
4726 * run.
4727 */
4728 if ((dev->ccbq.queue.entries > 0)
4729 && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4730 && (run_queue != 0)) {
4731 rundevq = 1;
4732 }
4733 }
4734 }
4735 if (rundevq != 0)
4736 xpt_run_dev_sendq(dev->target->bus);
4737 }
4738
4739 void
4740 xpt_release_simq(struct cam_sim *sim, int run_queue)
4741 {
4742 struct camq *sendq;
4743
4744 mtx_assert(sim->mtx, MA_OWNED);
4745
4746 sendq = &(sim->devq->send_queue);
4747 if (sendq->qfrozen_cnt > 0) {
4748
4749 sendq->qfrozen_cnt--;
4750 if (sendq->qfrozen_cnt == 0) {
4751 struct cam_eb *bus;
4752
4753 /*
4754 * If there is a timeout scheduled to release this
4755 * sim queue, remove it. The queue frozen count is
4756 * already at 0.
4757 */
4758 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4759 callout_stop(&sim->callout);
4760 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4761 }
4762 bus = xpt_find_bus(sim->path_id);
4763
4764 if (run_queue) {
4765 /*
4766 * Now that we are unfrozen run the send queue.
4767 */
4768 xpt_run_dev_sendq(bus);
4769 }
4770 xpt_release_bus(bus);
4771 }
4772 }
4773 }
4774
4775 /*
4776 * XXX Appears to be unused.
4777 */
4778 static void
4779 xpt_release_simq_timeout(void *arg)
4780 {
4781 struct cam_sim *sim;
4782
4783 sim = (struct cam_sim *)arg;
4784 xpt_release_simq(sim, /* run_queue */ TRUE);
4785 }
4786
4787 void
4788 xpt_done(union ccb *done_ccb)
4789 {
4790 struct cam_sim *sim;
4791
4792 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4793 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4794 /*
4795 * Queue up the request for handling by our SWI handler
4796 * any of the "non-immediate" type of ccbs.
4797 */
4798 sim = done_ccb->ccb_h.path->bus->sim;
4799 switch (done_ccb->ccb_h.path->periph->type) {
4800 case CAM_PERIPH_BIO:
4801 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h,
4802 sim_links.tqe);
4803 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4804 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) {
4805 mtx_lock(&cam_simq_lock);
4806 TAILQ_INSERT_TAIL(&cam_simq, sim,
4807 links);
4808 sim->flags |= CAM_SIM_ON_DONEQ;
4809 mtx_unlock(&cam_simq_lock);
4810 }
4811 if ((done_ccb->ccb_h.path->periph->flags &
4812 CAM_PERIPH_POLLED) == 0)
4813 swi_sched(cambio_ih, 0);
4814 break;
4815 default:
4816 panic("unknown periph type %d",
4817 done_ccb->ccb_h.path->periph->type);
4818 }
4819 }
4820 }
4821
4822 union ccb *
4823 xpt_alloc_ccb()
4824 {
4825 union ccb *new_ccb;
4826
4827 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_WAITOK);
4828 return (new_ccb);
4829 }
4830
4831 union ccb *
4832 xpt_alloc_ccb_nowait()
4833 {
4834 union ccb *new_ccb;
4835
4836 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_NOWAIT);
4837 return (new_ccb);
4838 }
4839
4840 void
4841 xpt_free_ccb(union ccb *free_ccb)
4842 {
4843 free(free_ccb, M_CAMXPT);
4844 }
4845
4846
4847
4848 /* Private XPT functions */
4849
4850 /*
4851 * Get a CAM control block for the caller. Charge the structure to the device
4852 * referenced by the path. If the this device has no 'credits' then the
4853 * device already has the maximum number of outstanding operations under way
4854 * and we return NULL. If we don't have sufficient resources to allocate more
4855 * ccbs, we also return NULL.
4856 */
4857 static union ccb *
4858 xpt_get_ccb(struct cam_ed *device)
4859 {
4860 union ccb *new_ccb;
4861 struct cam_sim *sim;
4862
4863 sim = device->sim;
4864 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) {
4865 new_ccb = xpt_alloc_ccb_nowait();
4866 if (new_ccb == NULL) {
4867 return (NULL);
4868 }
4869 if ((sim->flags & CAM_SIM_MPSAFE) == 0)
4870 callout_handle_init(&new_ccb->ccb_h.timeout_ch);
4871 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h,
4872 xpt_links.sle);
4873 sim->ccb_count++;
4874 }
4875 cam_ccbq_take_opening(&device->ccbq);
4876 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle);
4877 return (new_ccb);
4878 }
4879
4880 static void
4881 xpt_release_bus(struct cam_eb *bus)
4882 {
4883
4884 if ((--bus->refcount == 0)
4885 && (TAILQ_FIRST(&bus->et_entries) == NULL)) {
4886 mtx_lock(&xsoftc.xpt_topo_lock);
4887 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4888 xsoftc.bus_generation++;
4889 mtx_unlock(&xsoftc.xpt_topo_lock);
4890 cam_sim_release(bus->sim);
4891 free(bus, M_CAMXPT);
4892 }
4893 }
4894
4895 static struct cam_et *
4896 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4897 {
4898 struct cam_et *target;
4899
4900 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT);
4901 if (target != NULL) {
4902 struct cam_et *cur_target;
4903
4904 TAILQ_INIT(&target->ed_entries);
4905 target->bus = bus;
4906 target->target_id = target_id;
4907 target->refcount = 1;
4908 target->generation = 0;
4909 timevalclear(&target->last_reset);
4910 /*
4911 * Hold a reference to our parent bus so it
4912 * will not go away before we do.
4913 */
4914 bus->refcount++;
4915
4916 /* Insertion sort into our bus's target list */
4917 cur_target = TAILQ_FIRST(&bus->et_entries);
4918 while (cur_target != NULL && cur_target->target_id < target_id)
4919 cur_target = TAILQ_NEXT(cur_target, links);
4920
4921 if (cur_target != NULL) {
4922 TAILQ_INSERT_BEFORE(cur_target, target, links);
4923 } else {
4924 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4925 }
4926 bus->generation++;
4927 }
4928 return (target);
4929 }
4930
4931 static void
4932 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
4933 {
4934
4935 if ((--target->refcount == 0)
4936 && (TAILQ_FIRST(&target->ed_entries) == NULL)) {
4937 TAILQ_REMOVE(&bus->et_entries, target, links);
4938 bus->generation++;
4939 free(target, M_CAMXPT);
4940 xpt_release_bus(bus);
4941 }
4942 }
4943
4944 static struct cam_ed *
4945 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4946 {
4947 struct cam_path path;
4948 struct cam_ed *device;
4949 struct cam_devq *devq;
4950 cam_status status;
4951
4952 /* Make space for us in the device queue on our bus */
4953 devq = bus->sim->devq;
4954 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
4955
4956 if (status != CAM_REQ_CMP) {
4957 device = NULL;
4958 } else {
4959 device = (struct cam_ed *)malloc(sizeof(*device),
4960 M_CAMXPT, M_NOWAIT);
4961 }
4962
4963 if (device != NULL) {
4964 struct cam_ed *cur_device;
4965
4966 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
4967 device->alloc_ccb_entry.device = device;
4968 cam_init_pinfo(&device->send_ccb_entry.pinfo);
4969 device->send_ccb_entry.device = device;
4970 device->target = target;
4971 device->lun_id = lun_id;
4972 device->sim = bus->sim;
4973 /* Initialize our queues */
4974 if (camq_init(&device->drvq, 0) != 0) {
4975 free(device, M_CAMXPT);
4976 return (NULL);
4977 }
4978 if (cam_ccbq_init(&device->ccbq,
4979 bus->sim->max_dev_openings) != 0) {
4980 camq_fini(&device->drvq);
4981 free(device, M_CAMXPT);
4982 return (NULL);
4983 }
4984 SLIST_INIT(&device->asyncs);
4985 SLIST_INIT(&device->periphs);
4986 device->generation = 0;
4987 device->owner = NULL;
4988 /*
4989 * Take the default quirk entry until we have inquiry
4990 * data and can determine a better quirk to use.
4991 */
4992 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
4993 bzero(&device->inq_data, sizeof(device->inq_data));
4994 device->inq_flags = 0;
4995 device->queue_flags = 0;
4996 device->serial_num = NULL;
4997 device->serial_num_len = 0;
4998 device->qfrozen_cnt = 0;
4999 device->flags = CAM_DEV_UNCONFIGURED;
5000 device->tag_delay_count = 0;
5001 device->tag_saved_openings = 0;
5002 device->refcount = 1;
5003 if (bus->sim->flags & CAM_SIM_MPSAFE)
5004 callout_init_mtx(&device->callout, bus->sim->mtx, 0);
5005 else
5006 callout_init_mtx(&device->callout, &Giant, 0);
5007
5008 /*
5009 * Hold a reference to our parent target so it
5010 * will not go away before we do.
5011 */
5012 target->refcount++;
5013
5014 /*
5015 * XXX should be limited by number of CCBs this bus can
5016 * do.
5017 */
5018 bus->sim->max_ccbs += device->ccbq.devq_openings;
5019 /* Insertion sort into our target's device list */
5020 cur_device = TAILQ_FIRST(&target->ed_entries);
5021 while (cur_device != NULL && cur_device->lun_id < lun_id)
5022 cur_device = TAILQ_NEXT(cur_device, links);
5023 if (cur_device != NULL) {
5024 TAILQ_INSERT_BEFORE(cur_device, device, links);
5025 } else {
5026 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
5027 }
5028 target->generation++;
5029 if (lun_id != CAM_LUN_WILDCARD) {
5030 xpt_compile_path(&path,
5031 NULL,
5032 bus->path_id,
5033 target->target_id,
5034 lun_id);
5035 xpt_devise_transport(&path);
5036 xpt_release_path(&path);
5037 }
5038 }
5039 return (device);
5040 }
5041
5042 static void
5043 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
5044 struct cam_ed *device)
5045 {
5046
5047 if ((--device->refcount == 0)
5048 && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) {
5049 struct cam_devq *devq;
5050
5051 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
5052 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
5053 panic("Removing device while still queued for ccbs");
5054
5055 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
5056 callout_stop(&device->callout);
5057
5058 TAILQ_REMOVE(&target->ed_entries, device,links);
5059 target->generation++;
5060 bus->sim->max_ccbs -= device->ccbq.devq_openings;
5061 /* Release our slot in the devq */
5062 devq = bus->sim->devq;
5063 cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
5064 camq_fini(&device->drvq);
5065 camq_fini(&device->ccbq.queue);
5066 free(device, M_CAMXPT);
5067 xpt_release_target(bus, target);
5068 }
5069 }
5070
5071 static u_int32_t
5072 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5073 {
5074 int diff;
5075 int result;
5076 struct cam_ed *dev;
5077
5078 dev = path->device;
5079
5080 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
5081 result = cam_ccbq_resize(&dev->ccbq, newopenings);
5082 if (result == CAM_REQ_CMP && (diff < 0)) {
5083 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
5084 }
5085 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5086 || (dev->inq_flags & SID_CmdQue) != 0)
5087 dev->tag_saved_openings = newopenings;
5088 /* Adjust the global limit */
5089 dev->sim->max_ccbs += diff;
5090 return (result);
5091 }
5092
5093 static struct cam_eb *
5094 xpt_find_bus(path_id_t path_id)
5095 {
5096 struct cam_eb *bus;
5097
5098 mtx_lock(&xsoftc.xpt_topo_lock);
5099 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5100 bus != NULL;
5101 bus = TAILQ_NEXT(bus, links)) {
5102 if (bus->path_id == path_id) {
5103 bus->refcount++;
5104 break;
5105 }
5106 }
5107 mtx_unlock(&xsoftc.xpt_topo_lock);
5108 return (bus);
5109 }
5110
5111 static struct cam_et *
5112 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5113 {
5114 struct cam_et *target;
5115
5116 for (target = TAILQ_FIRST(&bus->et_entries);
5117 target != NULL;
5118 target = TAILQ_NEXT(target, links)) {
5119 if (target->target_id == target_id) {
5120 target->refcount++;
5121 break;
5122 }
5123 }
5124 return (target);
5125 }
5126
5127 static struct cam_ed *
5128 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5129 {
5130 struct cam_ed *device;
5131
5132 for (device = TAILQ_FIRST(&target->ed_entries);
5133 device != NULL;
5134 device = TAILQ_NEXT(device, links)) {
5135 if (device->lun_id == lun_id) {
5136 device->refcount++;
5137 break;
5138 }
5139 }
5140 return (device);
5141 }
5142
5143 typedef struct {
5144 union ccb *request_ccb;
5145 struct ccb_pathinq *cpi;
5146 int counter;
5147 } xpt_scan_bus_info;
5148
5149 /*
5150 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
5151 * As the scan progresses, xpt_scan_bus is used as the
5152 * callback on completion function.
5153 */
5154 static void
5155 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
5156 {
5157 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5158 ("xpt_scan_bus\n"));
5159 switch (request_ccb->ccb_h.func_code) {
5160 case XPT_SCAN_BUS:
5161 {
5162 xpt_scan_bus_info *scan_info;
5163 union ccb *work_ccb;
5164 struct cam_path *path;
5165 u_int i;
5166 u_int max_target;
5167 u_int initiator_id;
5168
5169 /* Find out the characteristics of the bus */
5170 work_ccb = xpt_alloc_ccb_nowait();
5171 if (work_ccb == NULL) {
5172 request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
5173 xpt_done(request_ccb);
5174 return;
5175 }
5176 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
5177 request_ccb->ccb_h.pinfo.priority);
5178 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
5179 xpt_action(work_ccb);
5180 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
5181 request_ccb->ccb_h.status = work_ccb->ccb_h.status;
5182 xpt_free_ccb(work_ccb);
5183 xpt_done(request_ccb);
5184 return;
5185 }
5186
5187 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5188 /*
5189 * Can't scan the bus on an adapter that
5190 * cannot perform the initiator role.
5191 */
5192 request_ccb->ccb_h.status = CAM_REQ_CMP;
5193 xpt_free_ccb(work_ccb);
5194 xpt_done(request_ccb);
5195 return;
5196 }
5197
5198 /* Save some state for use while we probe for devices */
5199 scan_info = (xpt_scan_bus_info *)
5200 malloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_NOWAIT);
5201 if (scan_info == NULL) {
5202 request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
5203 xpt_done(request_ccb);
5204 return;
5205 }
5206 scan_info->request_ccb = request_ccb;
5207 scan_info->cpi = &work_ccb->cpi;
5208
5209 /* Cache on our stack so we can work asynchronously */
5210 max_target = scan_info->cpi->max_target;
5211 initiator_id = scan_info->cpi->initiator_id;
5212
5213
5214 /*
5215 * We can scan all targets in parallel, or do it sequentially.
5216 */
5217 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
5218 max_target = 0;
5219 scan_info->counter = 0;
5220 } else {
5221 scan_info->counter = scan_info->cpi->max_target + 1;
5222 if (scan_info->cpi->initiator_id < scan_info->counter) {
5223 scan_info->counter--;
5224 }
5225 }
5226
5227 for (i = 0; i <= max_target; i++) {
5228 cam_status status;
5229 if (i == initiator_id)
5230 continue;
5231
5232 status = xpt_create_path(&path, xpt_periph,
5233 request_ccb->ccb_h.path_id,
5234 i, 0);
5235 if (status != CAM_REQ_CMP) {
5236 printf("xpt_scan_bus: xpt_create_path failed"
5237 " with status %#x, bus scan halted\n",
5238 status);
5239 free(scan_info, M_CAMXPT);
5240 request_ccb->ccb_h.status = status;
5241 xpt_free_ccb(work_ccb);
5242 xpt_done(request_ccb);
5243 break;
5244 }
5245 work_ccb = xpt_alloc_ccb_nowait();
5246 if (work_ccb == NULL) {
5247 xpt_free_ccb((union ccb *)scan_info->cpi);
5248 free(scan_info, M_CAMXPT);
5249 xpt_free_path(path);
5250 request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
5251 xpt_done(request_ccb);
5252 break;
5253 }
5254 xpt_setup_ccb(&work_ccb->ccb_h, path,
5255 request_ccb->ccb_h.pinfo.priority);
5256 work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5257 work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5258 work_ccb->ccb_h.ppriv_ptr0 = scan_info;
5259 work_ccb->crcn.flags = request_ccb->crcn.flags;
5260 xpt_action(work_ccb);
5261 }
5262 break;
5263 }
5264 case XPT_SCAN_LUN:
5265 {
5266 cam_status status;
5267 struct cam_path *path;
5268 xpt_scan_bus_info *scan_info;
5269 path_id_t path_id;
5270 target_id_t target_id;
5271 lun_id_t lun_id;
5272
5273 /* Reuse the same CCB to query if a device was really found */
5274 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
5275 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
5276 request_ccb->ccb_h.pinfo.priority);
5277 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5278
5279 path_id = request_ccb->ccb_h.path_id;
5280 target_id = request_ccb->ccb_h.target_id;
5281 lun_id = request_ccb->ccb_h.target_lun;
5282 xpt_action(request_ccb);
5283
5284 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
5285 struct cam_ed *device;
5286 struct cam_et *target;
5287 int phl;
5288
5289 /*
5290 * If we already probed lun 0 successfully, or
5291 * we have additional configured luns on this
5292 * target that might have "gone away", go onto
5293 * the next lun.
5294 */
5295 target = request_ccb->ccb_h.path->target;
5296 /*
5297 * We may touch devices that we don't
5298 * hold references too, so ensure they
5299 * don't disappear out from under us.
5300 * The target above is referenced by the
5301 * path in the request ccb.
5302 */
5303 phl = 0;
5304 device = TAILQ_FIRST(&target->ed_entries);
5305 if (device != NULL) {
5306 phl = CAN_SRCH_HI_SPARSE(device);
5307 if (device->lun_id == 0)
5308 device = TAILQ_NEXT(device, links);
5309 }
5310 if ((lun_id != 0) || (device != NULL)) {
5311 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
5312 lun_id++;
5313 }
5314 } else {
5315 struct cam_ed *device;
5316
5317 device = request_ccb->ccb_h.path->device;
5318
5319 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
5320 /* Try the next lun */
5321 if (lun_id < (CAM_SCSI2_MAXLUN-1)
5322 || CAN_SRCH_HI_DENSE(device))
5323 lun_id++;
5324 }
5325 }
5326
5327 /*
5328 * Free the current request path- we're done with it.
5329 */
5330 xpt_free_path(request_ccb->ccb_h.path);
5331
5332 /*
5333 * Check to see if we scan any further luns.
5334 */
5335 if (lun_id == request_ccb->ccb_h.target_lun
5336 || lun_id > scan_info->cpi->max_lun) {
5337 int done;
5338
5339 hop_again:
5340 done = 0;
5341 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
5342 scan_info->counter++;
5343 if (scan_info->counter ==
5344 scan_info->cpi->initiator_id) {
5345 scan_info->counter++;
5346 }
5347 if (scan_info->counter >=
5348 scan_info->cpi->max_target+1) {
5349 done = 1;
5350 }
5351 } else {
5352 scan_info->counter--;
5353 if (scan_info->counter == 0) {
5354 done = 1;
5355 }
5356 }
5357 if (done) {
5358 xpt_free_ccb(request_ccb);
5359 xpt_free_ccb((union ccb *)scan_info->cpi);
5360 request_ccb = scan_info->request_ccb;
5361 free(scan_info, M_CAMXPT);
5362 request_ccb->ccb_h.status = CAM_REQ_CMP;
5363 xpt_done(request_ccb);
5364 break;
5365 }
5366
5367 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) {
5368 xpt_free_ccb(request_ccb);
5369 break;
5370 }
5371 status = xpt_create_path(&path, xpt_periph,
5372 scan_info->request_ccb->ccb_h.path_id,
5373 scan_info->counter, 0);
5374 if (status != CAM_REQ_CMP) {
5375 printf("xpt_scan_bus: xpt_create_path failed"
5376 " with status %#x, bus scan halted\n",
5377 status);
5378 xpt_free_ccb(request_ccb);
5379 xpt_free_ccb((union ccb *)scan_info->cpi);
5380 request_ccb = scan_info->request_ccb;
5381 free(scan_info, M_CAMXPT);
5382 request_ccb->ccb_h.status = status;
5383 xpt_done(request_ccb);
5384 break;
5385 }
5386 xpt_setup_ccb(&request_ccb->ccb_h, path,
5387 request_ccb->ccb_h.pinfo.priority);
5388 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5389 request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5390 request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5391 request_ccb->crcn.flags =
5392 scan_info->request_ccb->crcn.flags;
5393 } else {
5394 status = xpt_create_path(&path, xpt_periph,
5395 path_id, target_id, lun_id);
5396 if (status != CAM_REQ_CMP) {
5397 printf("xpt_scan_bus: xpt_create_path failed "
5398 "with status %#x, halting LUN scan\n",
5399 status);
5400 goto hop_again;
5401 }
5402 xpt_setup_ccb(&request_ccb->ccb_h, path,
5403 request_ccb->ccb_h.pinfo.priority);
5404 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5405 request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5406 request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5407 request_ccb->crcn.flags =
5408 scan_info->request_ccb->crcn.flags;
5409 }
5410 xpt_action(request_ccb);
5411 break;
5412 }
5413 default:
5414 break;
5415 }
5416 }
5417
5418 typedef enum {
5419 PROBE_TUR,
5420 PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */
5421 PROBE_FULL_INQUIRY,
5422 PROBE_MODE_SENSE,
5423 PROBE_SERIAL_NUM_0,
5424 PROBE_SERIAL_NUM_1,
5425 PROBE_TUR_FOR_NEGOTIATION,
5426 PROBE_INQUIRY_BASIC_DV1,
5427 PROBE_INQUIRY_BASIC_DV2,
5428 PROBE_DV_EXIT,
5429 PROBE_INVALID
5430 } probe_action;
5431
5432 static char *probe_action_text[] = {
5433 "PROBE_TUR",
5434 "PROBE_INQUIRY",
5435 "PROBE_FULL_INQUIRY",
5436 "PROBE_MODE_SENSE",
5437 "PROBE_SERIAL_NUM_0",
5438 "PROBE_SERIAL_NUM_1",
5439 "PROBE_TUR_FOR_NEGOTIATION",
5440 "PROBE_INQUIRY_BASIC_DV1",
5441 "PROBE_INQUIRY_BASIC_DV2",
5442 "PROBE_DV_EXIT",
5443 "PROBE_INVALID"
5444 };
5445
5446 #define PROBE_SET_ACTION(softc, newaction) \
5447 do { \
5448 char **text; \
5449 text = probe_action_text; \
5450 CAM_DEBUG((softc)->periph->path, CAM_DEBUG_INFO, \
5451 ("Probe %s to %s\n", text[(softc)->action], \
5452 text[(newaction)])); \
5453 (softc)->action = (newaction); \
5454 } while(0)
5455
5456 typedef enum {
5457 PROBE_INQUIRY_CKSUM = 0x01,
5458 PROBE_SERIAL_CKSUM = 0x02,
5459 PROBE_NO_ANNOUNCE = 0x04
5460 } probe_flags;
5461
5462 typedef struct {
5463 TAILQ_HEAD(, ccb_hdr) request_ccbs;
5464 probe_action action;
5465 union ccb saved_ccb;
5466 probe_flags flags;
5467 MD5_CTX context;
5468 u_int8_t digest[16];
5469 struct cam_periph *periph;
5470 } probe_softc;
5471
5472 static void
5473 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5474 cam_flags flags, union ccb *request_ccb)
5475 {
5476 struct ccb_pathinq cpi;
5477 cam_status status;
5478 struct cam_path *new_path;
5479 struct cam_periph *old_periph;
5480
5481 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5482 ("xpt_scan_lun\n"));
5483
5484 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5485 cpi.ccb_h.func_code = XPT_PATH_INQ;
5486 xpt_action((union ccb *)&cpi);
5487
5488 if (cpi.ccb_h.status != CAM_REQ_CMP) {
5489 if (request_ccb != NULL) {
5490 request_ccb->ccb_h.status = cpi.ccb_h.status;
5491 xpt_done(request_ccb);
5492 }
5493 return;
5494 }
5495
5496 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5497 /*
5498 * Can't scan the bus on an adapter that
5499 * cannot perform the initiator role.
5500 */
5501 if (request_ccb != NULL) {
5502 request_ccb->ccb_h.status = CAM_REQ_CMP;
5503 xpt_done(request_ccb);
5504 }
5505 return;
5506 }
5507
5508 if (request_ccb == NULL) {
5509 request_ccb = malloc(sizeof(union ccb), M_CAMXPT, M_NOWAIT);
5510 if (request_ccb == NULL) {
5511 xpt_print(path, "xpt_scan_lun: can't allocate CCB, "
5512 "can't continue\n");
5513 return;
5514 }
5515 new_path = malloc(sizeof(*new_path), M_CAMXPT, M_NOWAIT);
5516 if (new_path == NULL) {
5517 xpt_print(path, "xpt_scan_lun: can't allocate path, "
5518 "can't continue\n");
5519 free(request_ccb, M_CAMXPT);
5520 return;
5521 }
5522 status = xpt_compile_path(new_path, xpt_periph,
5523 path->bus->path_id,
5524 path->target->target_id,
5525 path->device->lun_id);
5526
5527 if (status != CAM_REQ_CMP) {
5528 xpt_print(path, "xpt_scan_lun: can't compile path, "
5529 "can't continue\n");
5530 free(request_ccb, M_CAMXPT);
5531 free(new_path, M_CAMXPT);
5532 return;
5533 }
5534 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5535 request_ccb->ccb_h.cbfcnp = xptscandone;
5536 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5537 request_ccb->crcn.flags = flags;
5538 }
5539
5540 if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5541 probe_softc *softc;
5542
5543 softc = (probe_softc *)old_periph->softc;
5544 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5545 periph_links.tqe);
5546 } else {
5547 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5548 probestart, "probe",
5549 CAM_PERIPH_BIO,
5550 request_ccb->ccb_h.path, NULL, 0,
5551 request_ccb);
5552
5553 if (status != CAM_REQ_CMP) {
5554 xpt_print(path, "xpt_scan_lun: cam_alloc_periph "
5555 "returned an error, can't continue probe\n");
5556 request_ccb->ccb_h.status = status;
5557 xpt_done(request_ccb);
5558 }
5559 }
5560 }
5561
5562 static void
5563 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5564 {
5565 xpt_release_path(done_ccb->ccb_h.path);
5566 free(done_ccb->ccb_h.path, M_CAMXPT);
5567 free(done_ccb, M_CAMXPT);
5568 }
5569
5570 static cam_status
5571 proberegister(struct cam_periph *periph, void *arg)
5572 {
5573 union ccb *request_ccb; /* CCB representing the probe request */
5574 cam_status status;
5575 probe_softc *softc;
5576
5577 request_ccb = (union ccb *)arg;
5578 if (periph == NULL) {
5579 printf("proberegister: periph was NULL!!\n");
5580 return(CAM_REQ_CMP_ERR);
5581 }
5582
5583 if (request_ccb == NULL) {
5584 printf("proberegister: no probe CCB, "
5585 "can't register device\n");
5586 return(CAM_REQ_CMP_ERR);
5587 }
5588
5589 softc = (probe_softc *)malloc(sizeof(*softc), M_CAMXPT, M_NOWAIT);
5590
5591 if (softc == NULL) {
5592 printf("proberegister: Unable to probe new device. "
5593 "Unable to allocate softc\n");
5594 return(CAM_REQ_CMP_ERR);
5595 }
5596 TAILQ_INIT(&softc->request_ccbs);
5597 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5598 periph_links.tqe);
5599 softc->flags = 0;
5600 periph->softc = softc;
5601 softc->periph = periph;
5602 softc->action = PROBE_INVALID;
5603 status = cam_periph_acquire(periph);
5604 if (status != CAM_REQ_CMP) {
5605 return (status);
5606 }
5607
5608
5609 /*
5610 * Ensure we've waited at least a bus settle
5611 * delay before attempting to probe the device.
5612 * For HBAs that don't do bus resets, this won't make a difference.
5613 */
5614 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5615 scsi_delay);
5616 probeschedule(periph);
5617 return(CAM_REQ_CMP);
5618 }
5619
5620 static void
5621 probeschedule(struct cam_periph *periph)
5622 {
5623 struct ccb_pathinq cpi;
5624 union ccb *ccb;
5625 probe_softc *softc;
5626
5627 softc = (probe_softc *)periph->softc;
5628 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5629
5630 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5631 cpi.ccb_h.func_code = XPT_PATH_INQ;
5632 xpt_action((union ccb *)&cpi);
5633
5634 /*
5635 * If a device has gone away and another device, or the same one,
5636 * is back in the same place, it should have a unit attention
5637 * condition pending. It will not report the unit attention in
5638 * response to an inquiry, which may leave invalid transfer
5639 * negotiations in effect. The TUR will reveal the unit attention
5640 * condition. Only send the TUR for lun 0, since some devices
5641 * will get confused by commands other than inquiry to non-existent
5642 * luns. If you think a device has gone away start your scan from
5643 * lun 0. This will insure that any bogus transfer settings are
5644 * invalidated.
5645 *
5646 * If we haven't seen the device before and the controller supports
5647 * some kind of transfer negotiation, negotiate with the first
5648 * sent command if no bus reset was performed at startup. This
5649 * ensures that the device is not confused by transfer negotiation
5650 * settings left over by loader or BIOS action.
5651 */
5652 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5653 && (ccb->ccb_h.target_lun == 0)) {
5654 PROBE_SET_ACTION(softc, PROBE_TUR);
5655 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5656 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5657 proberequestdefaultnegotiation(periph);
5658 PROBE_SET_ACTION(softc, PROBE_INQUIRY);
5659 } else {
5660 PROBE_SET_ACTION(softc, PROBE_INQUIRY);
5661 }
5662
5663 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5664 softc->flags |= PROBE_NO_ANNOUNCE;
5665 else
5666 softc->flags &= ~PROBE_NO_ANNOUNCE;
5667
5668 xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5669 }
5670
5671 static void
5672 probestart(struct cam_periph *periph, union ccb *start_ccb)
5673 {
5674 /* Probe the device that our peripheral driver points to */
5675 struct ccb_scsiio *csio;
5676 probe_softc *softc;
5677
5678 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5679
5680 softc = (probe_softc *)periph->softc;
5681 csio = &start_ccb->csio;
5682
5683 switch (softc->action) {
5684 case PROBE_TUR:
5685 case PROBE_TUR_FOR_NEGOTIATION:
5686 case PROBE_DV_EXIT:
5687 {
5688 scsi_test_unit_ready(csio,
5689 /*retries*/10,
5690 probedone,
5691 MSG_SIMPLE_Q_TAG,
5692 SSD_FULL_SIZE,
5693 /*timeout*/60000);
5694 break;
5695 }
5696 case PROBE_INQUIRY:
5697 case PROBE_FULL_INQUIRY:
5698 case PROBE_INQUIRY_BASIC_DV1:
5699 case PROBE_INQUIRY_BASIC_DV2:
5700 {
5701 u_int inquiry_len;
5702 struct scsi_inquiry_data *inq_buf;
5703
5704 inq_buf = &periph->path->device->inq_data;
5705
5706 /*
5707 * If the device is currently configured, we calculate an
5708 * MD5 checksum of the inquiry data, and if the serial number
5709 * length is greater than 0, add the serial number data
5710 * into the checksum as well. Once the inquiry and the
5711 * serial number check finish, we attempt to figure out
5712 * whether we still have the same device.
5713 */
5714 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5715
5716 MD5Init(&softc->context);
5717 MD5Update(&softc->context, (unsigned char *)inq_buf,
5718 sizeof(struct scsi_inquiry_data));
5719 softc->flags |= PROBE_INQUIRY_CKSUM;
5720 if (periph->path->device->serial_num_len > 0) {
5721 MD5Update(&softc->context,
5722 periph->path->device->serial_num,
5723 periph->path->device->serial_num_len);
5724 softc->flags |= PROBE_SERIAL_CKSUM;
5725 }
5726 MD5Final(softc->digest, &softc->context);
5727 }
5728
5729 if (softc->action == PROBE_INQUIRY)
5730 inquiry_len = SHORT_INQUIRY_LENGTH;
5731 else
5732 inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf);
5733
5734 /*
5735 * Some parallel SCSI devices fail to send an
5736 * ignore wide residue message when dealing with
5737 * odd length inquiry requests. Round up to be
5738 * safe.
5739 */
5740 inquiry_len = roundup2(inquiry_len, 2);
5741
5742 if (softc->action == PROBE_INQUIRY_BASIC_DV1
5743 || softc->action == PROBE_INQUIRY_BASIC_DV2) {
5744 inq_buf = malloc(inquiry_len, M_CAMXPT, M_NOWAIT);
5745 }
5746 if (inq_buf == NULL) {
5747 xpt_print(periph->path, "malloc failure- skipping Basic"
5748 "Domain Validation\n");
5749 PROBE_SET_ACTION(softc, PROBE_DV_EXIT);
5750 scsi_test_unit_ready(csio,
5751 /*retries*/4,
5752 probedone,
5753 MSG_SIMPLE_Q_TAG,
5754 SSD_FULL_SIZE,
5755 /*timeout*/60000);
5756 break;
5757 }
5758 scsi_inquiry(csio,
5759 /*retries*/4,
5760 probedone,
5761 MSG_SIMPLE_Q_TAG,
5762 (u_int8_t *)inq_buf,
5763 inquiry_len,
5764 /*evpd*/FALSE,
5765 /*page_code*/0,
5766 SSD_MIN_SIZE,
5767 /*timeout*/60 * 1000);
5768 break;
5769 }
5770 case PROBE_MODE_SENSE:
5771 {
5772 void *mode_buf;
5773 int mode_buf_len;
5774
5775 mode_buf_len = sizeof(struct scsi_mode_header_6)
5776 + sizeof(struct scsi_mode_blk_desc)
5777 + sizeof(struct scsi_control_page);
5778 mode_buf = malloc(mode_buf_len, M_CAMXPT, M_NOWAIT);
5779 if (mode_buf != NULL) {
5780 scsi_mode_sense(csio,
5781 /*retries*/4,
5782 probedone,
5783 MSG_SIMPLE_Q_TAG,
5784 /*dbd*/FALSE,
5785 SMS_PAGE_CTRL_CURRENT,
5786 SMS_CONTROL_MODE_PAGE,
5787 mode_buf,
5788 mode_buf_len,
5789 SSD_FULL_SIZE,
5790 /*timeout*/60000);
5791 break;
5792 }
5793 xpt_print(periph->path, "Unable to mode sense control page - "
5794 "malloc failure\n");
5795 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0);
5796 }
5797 /* FALLTHROUGH */
5798 case PROBE_SERIAL_NUM_0:
5799 {
5800 struct scsi_vpd_supported_page_list *vpd_list = NULL;
5801 struct cam_ed *device;
5802
5803 device = periph->path->device;
5804 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) {
5805 vpd_list = malloc(sizeof(*vpd_list), M_CAMXPT,
5806 M_NOWAIT | M_ZERO);
5807 }
5808
5809 if (vpd_list != NULL) {
5810 scsi_inquiry(csio,
5811 /*retries*/4,
5812 probedone,
5813 MSG_SIMPLE_Q_TAG,
5814 (u_int8_t *)vpd_list,
5815 sizeof(*vpd_list),
5816 /*evpd*/TRUE,
5817 SVPD_SUPPORTED_PAGE_LIST,
5818 SSD_MIN_SIZE,
5819 /*timeout*/60 * 1000);
5820 break;
5821 }
5822 /*
5823 * We'll have to do without, let our probedone
5824 * routine finish up for us.
5825 */
5826 start_ccb->csio.data_ptr = NULL;
5827 probedone(periph, start_ccb);
5828 return;
5829 }
5830 case PROBE_SERIAL_NUM_1:
5831 {
5832 struct scsi_vpd_unit_serial_number *serial_buf;
5833 struct cam_ed* device;
5834
5835 serial_buf = NULL;
5836 device = periph->path->device;
5837 if (device->serial_num != NULL) {
5838 free(device->serial_num, M_CAMXPT);
5839 device->serial_num = NULL;
5840 device->serial_num_len = 0;
5841 }
5842
5843 serial_buf = (struct scsi_vpd_unit_serial_number *)
5844 malloc(sizeof(*serial_buf), M_CAMXPT, M_NOWAIT|M_ZERO);
5845
5846 if (serial_buf != NULL) {
5847 scsi_inquiry(csio,
5848 /*retries*/4,
5849 probedone,
5850 MSG_SIMPLE_Q_TAG,
5851 (u_int8_t *)serial_buf,
5852 sizeof(*serial_buf),
5853 /*evpd*/TRUE,
5854 SVPD_UNIT_SERIAL_NUMBER,
5855 SSD_MIN_SIZE,
5856 /*timeout*/60 * 1000);
5857 break;
5858 }
5859 /*
5860 * We'll have to do without, let our probedone
5861 * routine finish up for us.
5862 */
5863 start_ccb->csio.data_ptr = NULL;
5864 probedone(periph, start_ccb);
5865 return;
5866 }
5867 case PROBE_INVALID:
5868 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
5869 ("probestart: invalid action state\n"));
5870 default:
5871 break;
5872 }
5873 xpt_action(start_ccb);
5874 }
5875
5876 static void
5877 proberequestdefaultnegotiation(struct cam_periph *periph)
5878 {
5879 struct ccb_trans_settings cts;
5880
5881 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5882 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5883 cts.type = CTS_TYPE_USER_SETTINGS;
5884 xpt_action((union ccb *)&cts);
5885 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5886 return;
5887 }
5888 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5889 cts.type = CTS_TYPE_CURRENT_SETTINGS;
5890 xpt_action((union ccb *)&cts);
5891 }
5892
5893 /*
5894 * Backoff Negotiation Code- only pertinent for SPI devices.
5895 */
5896 static int
5897 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device)
5898 {
5899 struct ccb_trans_settings cts;
5900 struct ccb_trans_settings_spi *spi;
5901
5902 memset(&cts, 0, sizeof (cts));
5903 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5904 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5905 cts.type = CTS_TYPE_CURRENT_SETTINGS;
5906 xpt_action((union ccb *)&cts);
5907 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5908 if (bootverbose) {
5909 xpt_print(periph->path,
5910 "failed to get current device settings\n");
5911 }
5912 return (0);
5913 }
5914 if (cts.transport != XPORT_SPI) {
5915 if (bootverbose) {
5916 xpt_print(periph->path, "not SPI transport\n");
5917 }
5918 return (0);
5919 }
5920 spi = &cts.xport_specific.spi;
5921
5922 /*
5923 * We cannot renegotiate sync rate if we don't have one.
5924 */
5925 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) {
5926 if (bootverbose) {
5927 xpt_print(periph->path, "no sync rate known\n");
5928 }
5929 return (0);
5930 }
5931
5932 /*
5933 * We'll assert that we don't have to touch PPR options- the
5934 * SIM will see what we do with period and offset and adjust
5935 * the PPR options as appropriate.
5936 */
5937
5938 /*
5939 * A sync rate with unknown or zero offset is nonsensical.
5940 * A sync period of zero means Async.
5941 */
5942 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0
5943 || spi->sync_offset == 0 || spi->sync_period == 0) {
5944 if (bootverbose) {
5945 xpt_print(periph->path, "no sync rate available\n");
5946 }
5947 return (0);
5948 }
5949
5950 if (device->flags & CAM_DEV_DV_HIT_BOTTOM) {
5951 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
5952 ("hit async: giving up on DV\n"));
5953 return (0);
5954 }
5955
5956
5957 /*
5958 * Jump sync_period up by one, but stop at 5MHz and fall back to Async.
5959 * We don't try to remember 'last' settings to see if the SIM actually
5960 * gets into the speed we want to set. We check on the SIM telling
5961 * us that a requested speed is bad, but otherwise don't try and
5962 * check the speed due to the asynchronous and handshake nature
5963 * of speed setting.
5964 */
5965 spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET;
5966 for (;;) {
5967 spi->sync_period++;
5968 if (spi->sync_period >= 0xf) {
5969 spi->sync_period = 0;
5970 spi->sync_offset = 0;
5971 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
5972 ("setting to async for DV\n"));
5973 /*
5974 * Once we hit async, we don't want to try
5975 * any more settings.
5976 */
5977 device->flags |= CAM_DEV_DV_HIT_BOTTOM;
5978 } else if (bootverbose) {
5979 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
5980 ("DV: period 0x%x\n", spi->sync_period));
5981 printf("setting period to 0x%x\n", spi->sync_period);
5982 }
5983 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5984 cts.type = CTS_TYPE_CURRENT_SETTINGS;
5985 xpt_action((union ccb *)&cts);
5986 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5987 break;
5988 }
5989 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
5990 ("DV: failed to set period 0x%x\n", spi->sync_period));
5991 if (spi->sync_period == 0) {
5992 return (0);
5993 }
5994 }
5995 return (1);
5996 }
5997
5998 static void
5999 probedone(struct cam_periph *periph, union ccb *done_ccb)
6000 {
6001 probe_softc *softc;
6002 struct cam_path *path;
6003 u_int32_t priority;
6004
6005 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
6006
6007 softc = (probe_softc *)periph->softc;
6008 path = done_ccb->ccb_h.path;
6009 priority = done_ccb->ccb_h.pinfo.priority;
6010
6011 switch (softc->action) {
6012 case PROBE_TUR:
6013 {
6014 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
6015
6016 if (cam_periph_error(done_ccb, 0,
6017 SF_NO_PRINT, NULL) == ERESTART)
6018 return;
6019 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
6020 /* Don't wedge the queue */
6021 xpt_release_devq(done_ccb->ccb_h.path,
6022 /*count*/1,
6023 /*run_queue*/TRUE);
6024 }
6025 PROBE_SET_ACTION(softc, PROBE_INQUIRY);
6026 xpt_release_ccb(done_ccb);
6027 xpt_schedule(periph, priority);
6028 return;
6029 }
6030 case PROBE_INQUIRY:
6031 case PROBE_FULL_INQUIRY:
6032 {
6033 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
6034 struct scsi_inquiry_data *inq_buf;
6035 u_int8_t periph_qual;
6036
6037 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
6038 inq_buf = &path->device->inq_data;
6039
6040 periph_qual = SID_QUAL(inq_buf);
6041
6042 switch(periph_qual) {
6043 case SID_QUAL_LU_CONNECTED:
6044 {
6045 u_int8_t len;
6046
6047 /*
6048 * We conservatively request only
6049 * SHORT_INQUIRY_LEN bytes of inquiry
6050 * information during our first try
6051 * at sending an INQUIRY. If the device
6052 * has more information to give,
6053 * perform a second request specifying
6054 * the amount of information the device
6055 * is willing to give.
6056 */
6057 len = inq_buf->additional_length
6058 + offsetof(struct scsi_inquiry_data,
6059 additional_length) + 1;
6060 if (softc->action == PROBE_INQUIRY
6061 && len > SHORT_INQUIRY_LENGTH) {
6062 PROBE_SET_ACTION(softc, PROBE_FULL_INQUIRY);
6063 xpt_release_ccb(done_ccb);
6064 xpt_schedule(periph, priority);
6065 return;
6066 }
6067
6068 xpt_find_quirk(path->device);
6069
6070 xpt_devise_transport(path);
6071 if (INQ_DATA_TQ_ENABLED(inq_buf))
6072 PROBE_SET_ACTION(softc, PROBE_MODE_SENSE);
6073 else
6074 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0);
6075
6076 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
6077
6078 xpt_release_ccb(done_ccb);
6079 xpt_schedule(periph, priority);
6080 return;
6081 }
6082 default:
6083 break;
6084 }
6085 } else if (cam_periph_error(done_ccb, 0,
6086 done_ccb->ccb_h.target_lun > 0
6087 ? SF_RETRY_UA|SF_QUIET_IR
6088 : SF_RETRY_UA,
6089 &softc->saved_ccb) == ERESTART) {
6090 return;
6091 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6092 /* Don't wedge the queue */
6093 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6094 /*run_queue*/TRUE);
6095 }
6096 /*
6097 * If we get to this point, we got an error status back
6098 * from the inquiry and the error status doesn't require
6099 * automatically retrying the command. Therefore, the
6100 * inquiry failed. If we had inquiry information before
6101 * for this device, but this latest inquiry command failed,
6102 * the device has probably gone away. If this device isn't
6103 * already marked unconfigured, notify the peripheral
6104 * drivers that this device is no more.
6105 */
6106 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
6107 /* Send the async notification. */
6108 xpt_async(AC_LOST_DEVICE, path, NULL);
6109
6110 xpt_release_ccb(done_ccb);
6111 break;
6112 }
6113 case PROBE_MODE_SENSE:
6114 {
6115 struct ccb_scsiio *csio;
6116 struct scsi_mode_header_6 *mode_hdr;
6117
6118 csio = &done_ccb->csio;
6119 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
6120 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
6121 struct scsi_control_page *page;
6122 u_int8_t *offset;
6123
6124 offset = ((u_int8_t *)&mode_hdr[1])
6125 + mode_hdr->blk_desc_len;
6126 page = (struct scsi_control_page *)offset;
6127 path->device->queue_flags = page->queue_flags;
6128 } else if (cam_periph_error(done_ccb, 0,
6129 SF_RETRY_UA|SF_NO_PRINT,
6130 &softc->saved_ccb) == ERESTART) {
6131 return;
6132 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6133 /* Don't wedge the queue */
6134 xpt_release_devq(done_ccb->ccb_h.path,
6135 /*count*/1, /*run_queue*/TRUE);
6136 }
6137 xpt_release_ccb(done_ccb);
6138 free(mode_hdr, M_CAMXPT);
6139 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0);
6140 xpt_schedule(periph, priority);
6141 return;
6142 }
6143 case PROBE_SERIAL_NUM_0:
6144 {
6145 struct ccb_scsiio *csio;
6146 struct scsi_vpd_supported_page_list *page_list;
6147 int length, serialnum_supported, i;
6148
6149 serialnum_supported = 0;
6150 csio = &done_ccb->csio;
6151 page_list =
6152 (struct scsi_vpd_supported_page_list *)csio->data_ptr;
6153
6154 if (page_list == NULL) {
6155 /*
6156 * Don't process the command as it was never sent
6157 */
6158 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
6159 && (page_list->length > 0)) {
6160 length = min(page_list->length,
6161 SVPD_SUPPORTED_PAGES_SIZE);
6162 for (i = 0; i < length; i++) {
6163 if (page_list->list[i] ==
6164 SVPD_UNIT_SERIAL_NUMBER) {
6165 serialnum_supported = 1;
6166 break;
6167 }
6168 }
6169 } else if (cam_periph_error(done_ccb, 0,
6170 SF_RETRY_UA|SF_NO_PRINT,
6171 &softc->saved_ccb) == ERESTART) {
6172 return;
6173 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6174 /* Don't wedge the queue */
6175 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6176 /*run_queue*/TRUE);
6177 }
6178
6179 if (page_list != NULL)
6180 free(page_list, M_CAMXPT);
6181
6182 if (serialnum_supported) {
6183 xpt_release_ccb(done_ccb);
6184 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_1);
6185 xpt_schedule(periph, priority);
6186 return;
6187 }
6188
6189 csio->data_ptr = NULL;
6190 /* FALLTHROUGH */
6191 }
6192
6193 case PROBE_SERIAL_NUM_1:
6194 {
6195 struct ccb_scsiio *csio;
6196 struct scsi_vpd_unit_serial_number *serial_buf;
6197 u_int32_t priority;
6198 int changed;
6199 int have_serialnum;
6200
6201 changed = 1;
6202 have_serialnum = 0;
6203 csio = &done_ccb->csio;
6204 priority = done_ccb->ccb_h.pinfo.priority;
6205 serial_buf =
6206 (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
6207
6208 /* Clean up from previous instance of this device */
6209 if (path->device->serial_num != NULL) {
6210 free(path->device->serial_num, M_CAMXPT);
6211 path->device->serial_num = NULL;
6212 path->device->serial_num_len = 0;
6213 }
6214
6215 if (serial_buf == NULL) {
6216 /*
6217 * Don't process the command as it was never sent
6218 */
6219 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
6220 && (serial_buf->length > 0)) {
6221
6222 have_serialnum = 1;
6223 path->device->serial_num =
6224 (u_int8_t *)malloc((serial_buf->length + 1),
6225 M_CAMXPT, M_NOWAIT);
6226 if (path->device->serial_num != NULL) {
6227 bcopy(serial_buf->serial_num,
6228 path->device->serial_num,
6229 serial_buf->length);
6230 path->device->serial_num_len =
6231 serial_buf->length;
6232 path->device->serial_num[serial_buf->length]
6233 = '\0';
6234 }
6235 } else if (cam_periph_error(done_ccb, 0,
6236 SF_RETRY_UA|SF_NO_PRINT,
6237 &softc->saved_ccb) == ERESTART) {
6238 return;
6239 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6240 /* Don't wedge the queue */
6241 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6242 /*run_queue*/TRUE);
6243 }
6244
6245 /*
6246 * Let's see if we have seen this device before.
6247 */
6248 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
6249 MD5_CTX context;
6250 u_int8_t digest[16];
6251
6252 MD5Init(&context);
6253
6254 MD5Update(&context,
6255 (unsigned char *)&path->device->inq_data,
6256 sizeof(struct scsi_inquiry_data));
6257
6258 if (have_serialnum)
6259 MD5Update(&context, serial_buf->serial_num,
6260 serial_buf->length);
6261
6262 MD5Final(digest, &context);
6263 if (bcmp(softc->digest, digest, 16) == 0)
6264 changed = 0;
6265
6266 /*
6267 * XXX Do we need to do a TUR in order to ensure
6268 * that the device really hasn't changed???
6269 */
6270 if ((changed != 0)
6271 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
6272 xpt_async(AC_LOST_DEVICE, path, NULL);
6273 }
6274 if (serial_buf != NULL)
6275 free(serial_buf, M_CAMXPT);
6276
6277 if (changed != 0) {
6278 /*
6279 * Now that we have all the necessary
6280 * information to safely perform transfer
6281 * negotiations... Controllers don't perform
6282 * any negotiation or tagged queuing until
6283 * after the first XPT_SET_TRAN_SETTINGS ccb is
6284 * received. So, on a new device, just retrieve
6285 * the user settings, and set them as the current
6286 * settings to set the device up.
6287 */
6288 proberequestdefaultnegotiation(periph);
6289 xpt_release_ccb(done_ccb);
6290
6291 /*
6292 * Perform a TUR to allow the controller to
6293 * perform any necessary transfer negotiation.
6294 */
6295 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION);
6296 xpt_schedule(periph, priority);
6297 return;
6298 }
6299 xpt_release_ccb(done_ccb);
6300 break;
6301 }
6302 case PROBE_TUR_FOR_NEGOTIATION:
6303 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
6304 DELAY(500000);
6305 if (cam_periph_error(done_ccb, 0, SF_RETRY_UA,
6306 NULL) == ERESTART)
6307 return;
6308 }
6309 /* FALLTHROUGH */
6310 case PROBE_DV_EXIT:
6311 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6312 /* Don't wedge the queue */
6313 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6314 /*run_queue*/TRUE);
6315 }
6316 /*
6317 * Do Domain Validation for lun 0 on devices that claim
6318 * to support Synchronous Transfer modes.
6319 */
6320 if (softc->action == PROBE_TUR_FOR_NEGOTIATION
6321 && done_ccb->ccb_h.target_lun == 0
6322 && (path->device->inq_data.flags & SID_Sync) != 0
6323 && (path->device->flags & CAM_DEV_IN_DV) == 0) {
6324 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
6325 ("Begin Domain Validation\n"));
6326 path->device->flags |= CAM_DEV_IN_DV;
6327 xpt_release_ccb(done_ccb);
6328 PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV1);
6329 xpt_schedule(periph, priority);
6330 return;
6331 }
6332 if (softc->action == PROBE_DV_EXIT) {
6333 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
6334 ("Leave Domain Validation\n"));
6335 }
6336 path->device->flags &=
6337 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM);
6338 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
6339 /* Inform the XPT that a new device has been found */
6340 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
6341 xpt_action(done_ccb);
6342 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
6343 done_ccb);
6344 }
6345 xpt_release_ccb(done_ccb);
6346 break;
6347 case PROBE_INQUIRY_BASIC_DV1:
6348 case PROBE_INQUIRY_BASIC_DV2:
6349 {
6350 struct scsi_inquiry_data *nbuf;
6351 struct ccb_scsiio *csio;
6352
6353 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6354 /* Don't wedge the queue */
6355 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6356 /*run_queue*/TRUE);
6357 }
6358 csio = &done_ccb->csio;
6359 nbuf = (struct scsi_inquiry_data *)csio->data_ptr;
6360 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) {
6361 xpt_print(path,
6362 "inquiry data fails comparison at DV%d step\n",
6363 softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2);
6364 if (proberequestbackoff(periph, path->device)) {
6365 path->device->flags &= ~CAM_DEV_IN_DV;
6366 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION);
6367 } else {
6368 /* give up */
6369 PROBE_SET_ACTION(softc, PROBE_DV_EXIT);
6370 }
6371 free(nbuf, M_CAMXPT);
6372 xpt_release_ccb(done_ccb);
6373 xpt_schedule(periph, priority);
6374 return;
6375 }
6376 free(nbuf, M_CAMXPT);
6377 if (softc->action == PROBE_INQUIRY_BASIC_DV1) {
6378 PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV2);
6379 xpt_release_ccb(done_ccb);
6380 xpt_schedule(periph, priority);
6381 return;
6382 }
6383 if (softc->action == PROBE_INQUIRY_BASIC_DV2) {
6384 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
6385 ("Leave Domain Validation Successfully\n"));
6386 }
6387 path->device->flags &=
6388 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM);
6389 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
6390 /* Inform the XPT that a new device has been found */
6391 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
6392 xpt_action(done_ccb);
6393 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
6394 done_ccb);
6395 }
6396 xpt_release_ccb(done_ccb);
6397 break;
6398 }
6399 case PROBE_INVALID:
6400 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_INFO,
6401 ("probedone: invalid action state\n"));
6402 default:
6403 break;
6404 }
6405 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
6406 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
6407 done_ccb->ccb_h.status = CAM_REQ_CMP;
6408 xpt_done(done_ccb);
6409 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
6410 cam_periph_invalidate(periph);
6411 cam_periph_release_locked(periph);
6412 } else {
6413 probeschedule(periph);
6414 }
6415 }
6416
6417 static void
6418 probecleanup(struct cam_periph *periph)
6419 {
6420 free(periph->softc, M_CAMXPT);
6421 }
6422
6423 static void
6424 xpt_find_quirk(struct cam_ed *device)
6425 {
6426 caddr_t match;
6427
6428 match = cam_quirkmatch((caddr_t)&device->inq_data,
6429 (caddr_t)xpt_quirk_table,
6430 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
6431 sizeof(*xpt_quirk_table), scsi_inquiry_match);
6432
6433 if (match == NULL)
6434 panic("xpt_find_quirk: device didn't match wildcard entry!!");
6435
6436 device->quirk = (struct xpt_quirk_entry *)match;
6437 }
6438
6439 static int
6440 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS)
6441 {
6442 int error, val;
6443
6444 val = cam_srch_hi;
6445 error = sysctl_handle_int(oidp, &val, 0, req);
6446 if (error != 0 || req->newptr == NULL)
6447 return (error);
6448 if (val == 0 || val == 1) {
6449 cam_srch_hi = val;
6450 return (0);
6451 } else {
6452 return (EINVAL);
6453 }
6454 }
6455
6456
6457 static void
6458 xpt_devise_transport(struct cam_path *path)
6459 {
6460 struct ccb_pathinq cpi;
6461 struct ccb_trans_settings cts;
6462 struct scsi_inquiry_data *inq_buf;
6463
6464 /* Get transport information from the SIM */
6465 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
6466 cpi.ccb_h.func_code = XPT_PATH_INQ;
6467 xpt_action((union ccb *)&cpi);
6468
6469 inq_buf = NULL;
6470 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0)
6471 inq_buf = &path->device->inq_data;
6472 path->device->protocol = PROTO_SCSI;
6473 path->device->protocol_version =
6474 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version;
6475 path->device->transport = cpi.transport;
6476 path->device->transport_version = cpi.transport_version;
6477
6478 /*
6479 * Any device not using SPI3 features should
6480 * be considered SPI2 or lower.
6481 */
6482 if (inq_buf != NULL) {
6483 if (path->device->transport == XPORT_SPI
6484 && (inq_buf->spi3data & SID_SPI_MASK) == 0
6485 && path->device->transport_version > 2)
6486 path->device->transport_version = 2;
6487 } else {
6488 struct cam_ed* otherdev;
6489
6490 for (otherdev = TAILQ_FIRST(&path->target->ed_entries);
6491 otherdev != NULL;
6492 otherdev = TAILQ_NEXT(otherdev, links)) {
6493 if (otherdev != path->device)
6494 break;
6495 }
6496
6497 if (otherdev != NULL) {
6498 /*
6499 * Initially assume the same versioning as
6500 * prior luns for this target.
6501 */
6502 path->device->protocol_version =
6503 otherdev->protocol_version;
6504 path->device->transport_version =
6505 otherdev->transport_version;
6506 } else {
6507 /* Until we know better, opt for safty */
6508 path->device->protocol_version = 2;
6509 if (path->device->transport == XPORT_SPI)
6510 path->device->transport_version = 2;
6511 else
6512 path->device->transport_version = 0;
6513 }
6514 }
6515
6516 /*
6517 * XXX
6518 * For a device compliant with SPC-2 we should be able
6519 * to determine the transport version supported by
6520 * scrutinizing the version descriptors in the
6521 * inquiry buffer.
6522 */
6523
6524 /* Tell the controller what we think */
6525 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
6526 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
6527 cts.type = CTS_TYPE_CURRENT_SETTINGS;
6528 cts.transport = path->device->transport;
6529 cts.transport_version = path->device->transport_version;
6530 cts.protocol = path->device->protocol;
6531 cts.protocol_version = path->device->protocol_version;
6532 cts.proto_specific.valid = 0;
6533 cts.xport_specific.valid = 0;
6534 xpt_action((union ccb *)&cts);
6535 }
6536
6537 static void
6538 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
6539 int async_update)
6540 {
6541 struct ccb_pathinq cpi;
6542 struct ccb_trans_settings cur_cts;
6543 struct ccb_trans_settings_scsi *scsi;
6544 struct ccb_trans_settings_scsi *cur_scsi;
6545 struct cam_sim *sim;
6546 struct scsi_inquiry_data *inq_data;
6547
6548 if (device == NULL) {
6549 cts->ccb_h.status = CAM_PATH_INVALID;
6550 xpt_done((union ccb *)cts);
6551 return;
6552 }
6553
6554 if (cts->protocol == PROTO_UNKNOWN
6555 || cts->protocol == PROTO_UNSPECIFIED) {
6556 cts->protocol = device->protocol;
6557 cts->protocol_version = device->protocol_version;
6558 }
6559
6560 if (cts->protocol_version == PROTO_VERSION_UNKNOWN
6561 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED)
6562 cts->protocol_version = device->protocol_version;
6563
6564 if (cts->protocol != device->protocol) {
6565 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n",
6566 cts->protocol, device->protocol);
6567 cts->protocol = device->protocol;
6568 }
6569
6570 if (cts->protocol_version > device->protocol_version) {
6571 if (bootverbose) {
6572 xpt_print(cts->ccb_h.path, "Down reving Protocol "
6573 "Version from %d to %d?\n", cts->protocol_version,
6574 device->protocol_version);
6575 }
6576 cts->protocol_version = device->protocol_version;
6577 }
6578
6579 if (cts->transport == XPORT_UNKNOWN
6580 || cts->transport == XPORT_UNSPECIFIED) {
6581 cts->transport = device->transport;
6582 cts->transport_version = device->transport_version;
6583 }
6584
6585 if (cts->transport_version == XPORT_VERSION_UNKNOWN
6586 || cts->transport_version == XPORT_VERSION_UNSPECIFIED)
6587 cts->transport_version = device->transport_version;
6588
6589 if (cts->transport != device->transport) {
6590 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n",
6591 cts->transport, device->transport);
6592 cts->transport = device->transport;
6593 }
6594
6595 if (cts->transport_version > device->transport_version) {
6596 if (bootverbose) {
6597 xpt_print(cts->ccb_h.path, "Down reving Transport "
6598 "Version from %d to %d?\n", cts->transport_version,
6599 device->transport_version);
6600 }
6601 cts->transport_version = device->transport_version;
6602 }
6603
6604 sim = cts->ccb_h.path->bus->sim;
6605
6606 /*
6607 * Nothing more of interest to do unless
6608 * this is a device connected via the
6609 * SCSI protocol.
6610 */
6611 if (cts->protocol != PROTO_SCSI) {
6612 if (async_update == FALSE)
6613 (*(sim->sim_action))(sim, (union ccb *)cts);
6614 return;
6615 }
6616
6617 inq_data = &device->inq_data;
6618 scsi = &cts->proto_specific.scsi;
6619 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
6620 cpi.ccb_h.func_code = XPT_PATH_INQ;
6621 xpt_action((union ccb *)&cpi);
6622
6623 /* SCSI specific sanity checking */
6624 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
6625 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0
6626 || (device->queue_flags & SCP_QUEUE_DQUE) != 0
6627 || (device->quirk->mintags == 0)) {
6628 /*
6629 * Can't tag on hardware that doesn't support tags,
6630 * doesn't have it enabled, or has broken tag support.
6631 */
6632 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6633 }
6634
6635 if (async_update == FALSE) {
6636 /*
6637 * Perform sanity checking against what the
6638 * controller and device can do.
6639 */
6640 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
6641 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
6642 cur_cts.type = cts->type;
6643 xpt_action((union ccb *)&cur_cts);
6644 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
6645 return;
6646 }
6647 cur_scsi = &cur_cts.proto_specific.scsi;
6648 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) {
6649 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6650 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB;
6651 }
6652 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0)
6653 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6654 }
6655
6656 /* SPI specific sanity checking */
6657 if (cts->transport == XPORT_SPI && async_update == FALSE) {
6658 u_int spi3caps;
6659 struct ccb_trans_settings_spi *spi;
6660 struct ccb_trans_settings_spi *cur_spi;
6661
6662 spi = &cts->xport_specific.spi;
6663
6664 cur_spi = &cur_cts.xport_specific.spi;
6665
6666 /* Fill in any gaps in what the user gave us */
6667 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6668 spi->sync_period = cur_spi->sync_period;
6669 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6670 spi->sync_period = 0;
6671 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6672 spi->sync_offset = cur_spi->sync_offset;
6673 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6674 spi->sync_offset = 0;
6675 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6676 spi->ppr_options = cur_spi->ppr_options;
6677 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6678 spi->ppr_options = 0;
6679 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6680 spi->bus_width = cur_spi->bus_width;
6681 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6682 spi->bus_width = 0;
6683 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) {
6684 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6685 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB;
6686 }
6687 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0)
6688 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6689 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6690 && (inq_data->flags & SID_Sync) == 0
6691 && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6692 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)) {
6693 /* Force async */
6694 spi->sync_period = 0;
6695 spi->sync_offset = 0;
6696 }
6697
6698 switch (spi->bus_width) {
6699 case MSG_EXT_WDTR_BUS_32_BIT:
6700 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6701 || (inq_data->flags & SID_WBus32) != 0
6702 || cts->type == CTS_TYPE_USER_SETTINGS)
6703 && (cpi.hba_inquiry & PI_WIDE_32) != 0)
6704 break;
6705 /* Fall Through to 16-bit */
6706 case MSG_EXT_WDTR_BUS_16_BIT:
6707 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6708 || (inq_data->flags & SID_WBus16) != 0
6709 || cts->type == CTS_TYPE_USER_SETTINGS)
6710 && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
6711 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
6712 break;
6713 }
6714 /* Fall Through to 8-bit */
6715 default: /* New bus width?? */
6716 case MSG_EXT_WDTR_BUS_8_BIT:
6717 /* All targets can do this */
6718 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
6719 break;
6720 }
6721
6722 spi3caps = cpi.xport_specific.spi.ppr_options;
6723 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6724 && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6725 spi3caps &= inq_data->spi3data;
6726
6727 if ((spi3caps & SID_SPI_CLOCK_DT) == 0)
6728 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;
6729
6730 if ((spi3caps & SID_SPI_IUS) == 0)
6731 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;
6732
6733 if ((spi3caps & SID_SPI_QAS) == 0)
6734 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
6735
6736 /* No SPI Transfer settings are allowed unless we are wide */
6737 if (spi->bus_width == 0)
6738 spi->ppr_options = 0;
6739
6740 if ((spi->valid & CTS_SPI_VALID_DISC)
6741 && ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0)) {
6742 /*
6743 * Can't tag queue without disconnection.
6744 */
6745 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6746 scsi->valid |= CTS_SCSI_VALID_TQ;
6747 }
6748
6749 /*
6750 * If we are currently performing tagged transactions to
6751 * this device and want to change its negotiation parameters,
6752 * go non-tagged for a bit to give the controller a chance to
6753 * negotiate unhampered by tag messages.
6754 */
6755 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6756 && (device->inq_flags & SID_CmdQue) != 0
6757 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6758 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE|
6759 CTS_SPI_VALID_SYNC_OFFSET|
6760 CTS_SPI_VALID_BUS_WIDTH)) != 0)
6761 xpt_toggle_tags(cts->ccb_h.path);
6762 }
6763
6764 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6765 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
6766 int device_tagenb;
6767
6768 /*
6769 * If we are transitioning from tags to no-tags or
6770 * vice-versa, we need to carefully freeze and restart
6771 * the queue so that we don't overlap tagged and non-tagged
6772 * commands. We also temporarily stop tags if there is
6773 * a change in transfer negotiation settings to allow
6774 * "tag-less" negotiation.
6775 */
6776 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6777 || (device->inq_flags & SID_CmdQue) != 0)
6778 device_tagenb = TRUE;
6779 else
6780 device_tagenb = FALSE;
6781
6782 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6783 && device_tagenb == FALSE)
6784 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0
6785 && device_tagenb == TRUE)) {
6786
6787 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
6788 /*
6789 * Delay change to use tags until after a
6790 * few commands have gone to this device so
6791 * the controller has time to perform transfer
6792 * negotiations without tagged messages getting
6793 * in the way.
6794 */
6795 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
6796 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
6797 } else {
6798 struct ccb_relsim crs;
6799
6800 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
6801 device->inq_flags &= ~SID_CmdQue;
6802 xpt_dev_ccbq_resize(cts->ccb_h.path,
6803 sim->max_dev_openings);
6804 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6805 device->tag_delay_count = 0;
6806
6807 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
6808 /*priority*/1);
6809 crs.ccb_h.func_code = XPT_REL_SIMQ;
6810 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6811 crs.openings
6812 = crs.release_timeout
6813 = crs.qfrozen_cnt
6814 = 0;
6815 xpt_action((union ccb *)&crs);
6816 }
6817 }
6818 }
6819 if (async_update == FALSE)
6820 (*(sim->sim_action))(sim, (union ccb *)cts);
6821 }
6822
6823
6824 static void
6825 xpt_toggle_tags(struct cam_path *path)
6826 {
6827 struct cam_ed *dev;
6828
6829 /*
6830 * Give controllers a chance to renegotiate
6831 * before starting tag operations. We
6832 * "toggle" tagged queuing off then on
6833 * which causes the tag enable command delay
6834 * counter to come into effect.
6835 */
6836 dev = path->device;
6837 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6838 || ((dev->inq_flags & SID_CmdQue) != 0
6839 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
6840 struct ccb_trans_settings cts;
6841
6842 xpt_setup_ccb(&cts.ccb_h, path, 1);
6843 cts.protocol = PROTO_SCSI;
6844 cts.protocol_version = PROTO_VERSION_UNSPECIFIED;
6845 cts.transport = XPORT_UNSPECIFIED;
6846 cts.transport_version = XPORT_VERSION_UNSPECIFIED;
6847 cts.proto_specific.scsi.flags = 0;
6848 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ;
6849 xpt_set_transfer_settings(&cts, path->device,
6850 /*async_update*/TRUE);
6851 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB;
6852 xpt_set_transfer_settings(&cts, path->device,
6853 /*async_update*/TRUE);
6854 }
6855 }
6856
6857 static void
6858 xpt_start_tags(struct cam_path *path)
6859 {
6860 struct ccb_relsim crs;
6861 struct cam_ed *device;
6862 struct cam_sim *sim;
6863 int newopenings;
6864
6865 device = path->device;
6866 sim = path->bus->sim;
6867 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6868 xpt_freeze_devq(path, /*count*/1);
6869 device->inq_flags |= SID_CmdQue;
6870 if (device->tag_saved_openings != 0)
6871 newopenings = device->tag_saved_openings;
6872 else
6873 newopenings = min(device->quirk->maxtags,
6874 sim->max_tagged_dev_openings);
6875 xpt_dev_ccbq_resize(path, newopenings);
6876 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1);
6877 crs.ccb_h.func_code = XPT_REL_SIMQ;
6878 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6879 crs.openings
6880 = crs.release_timeout
6881 = crs.qfrozen_cnt
6882 = 0;
6883 xpt_action((union ccb *)&crs);
6884 }
6885
6886 static int busses_to_config;
6887 static int busses_to_reset;
6888
6889 static int
6890 xptconfigbuscountfunc(struct cam_eb *bus, void *arg)
6891 {
6892
6893 mtx_assert(bus->sim->mtx, MA_OWNED);
6894
6895 if (bus->path_id != CAM_XPT_PATH_ID) {
6896 struct cam_path path;
6897 struct ccb_pathinq cpi;
6898 int can_negotiate;
6899
6900 busses_to_config++;
6901 xpt_compile_path(&path, NULL, bus->path_id,
6902 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
6903 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
6904 cpi.ccb_h.func_code = XPT_PATH_INQ;
6905 xpt_action((union ccb *)&cpi);
6906 can_negotiate = cpi.hba_inquiry;
6907 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6908 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0
6909 && can_negotiate)
6910 busses_to_reset++;
6911 xpt_release_path(&path);
6912 }
6913
6914 return(1);
6915 }
6916
6917 static int
6918 xptconfigfunc(struct cam_eb *bus, void *arg)
6919 {
6920 struct cam_path *path;
6921 union ccb *work_ccb;
6922
6923 mtx_assert(bus->sim->mtx, MA_OWNED);
6924
6925 if (bus->path_id != CAM_XPT_PATH_ID) {
6926 cam_status status;
6927 int can_negotiate;
6928
6929 work_ccb = xpt_alloc_ccb_nowait();
6930 if (work_ccb == NULL) {
6931 busses_to_config--;
6932 xpt_finishconfig(xpt_periph, NULL);
6933 return(0);
6934 }
6935 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id,
6936 CAM_TARGET_WILDCARD,
6937 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){
6938 printf("xptconfigfunc: xpt_create_path failed with "
6939 "status %#x for bus %d\n", status, bus->path_id);
6940 printf("xptconfigfunc: halting bus configuration\n");
6941 xpt_free_ccb(work_ccb);
6942 busses_to_config--;
6943 xpt_finishconfig(xpt_periph, NULL);
6944 return(0);
6945 }
6946 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6947 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
6948 xpt_action(work_ccb);
6949 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
6950 printf("xptconfigfunc: CPI failed on bus %d "
6951 "with status %d\n", bus->path_id,
6952 work_ccb->ccb_h.status);
6953 xpt_finishconfig(xpt_periph, work_ccb);
6954 return(1);
6955 }
6956
6957 can_negotiate = work_ccb->cpi.hba_inquiry;
6958 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6959 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0
6960 && (can_negotiate != 0)) {
6961 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6962 work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6963 work_ccb->ccb_h.cbfcnp = NULL;
6964 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE,
6965 ("Resetting Bus\n"));
6966 xpt_action(work_ccb);
6967 xpt_finishconfig(xpt_periph, work_ccb);
6968 } else {
6969 /* Act as though we performed a successful BUS RESET */
6970 work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6971 xpt_finishconfig(xpt_periph, work_ccb);
6972 }
6973 }
6974
6975 return(1);
6976 }
6977
6978 static void
6979 xpt_config(void *arg)
6980 {
6981 /*
6982 * Now that interrupts are enabled, go find our devices
6983 */
6984
6985 #ifdef CAMDEBUG
6986 /* Setup debugging flags and path */
6987 #ifdef CAM_DEBUG_FLAGS
6988 cam_dflags = CAM_DEBUG_FLAGS;
6989 #else /* !CAM_DEBUG_FLAGS */
6990 cam_dflags = CAM_DEBUG_NONE;
6991 #endif /* CAM_DEBUG_FLAGS */
6992 #ifdef CAM_DEBUG_BUS
6993 if (cam_dflags != CAM_DEBUG_NONE) {
6994 /*
6995 * Locking is specifically omitted here. No SIMs have
6996 * registered yet, so xpt_create_path will only be searching
6997 * empty lists of targets and devices.
6998 */
6999 if (xpt_create_path(&cam_dpath, xpt_periph,
7000 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
7001 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
7002 printf("xpt_config: xpt_create_path() failed for debug"
7003 " target %d:%d:%d, debugging disabled\n",
7004 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
7005 cam_dflags = CAM_DEBUG_NONE;
7006 }
7007 } else
7008 cam_dpath = NULL;
7009 #else /* !CAM_DEBUG_BUS */
7010 cam_dpath = NULL;
7011 #endif /* CAM_DEBUG_BUS */
7012 #endif /* CAMDEBUG */
7013
7014 /*
7015 * Scan all installed busses.
7016 */
7017 xpt_for_all_busses(xptconfigbuscountfunc, NULL);
7018
7019 if (busses_to_config == 0) {
7020 /* Call manually because we don't have any busses */
7021 xpt_finishconfig(xpt_periph, NULL);
7022 } else {
7023 if (busses_to_reset > 0 && scsi_delay >= 2000) {
7024 printf("Waiting %d seconds for SCSI "
7025 "devices to settle\n", scsi_delay/1000);
7026 }
7027 xpt_for_all_busses(xptconfigfunc, NULL);
7028 }
7029 }
7030
7031 /*
7032 * If the given device only has one peripheral attached to it, and if that
7033 * peripheral is the passthrough driver, announce it. This insures that the
7034 * user sees some sort of announcement for every peripheral in their system.
7035 */
7036 static int
7037 xptpassannouncefunc(struct cam_ed *device, void *arg)
7038 {
7039 struct cam_periph *periph;
7040 int i;
7041
7042 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
7043 periph = SLIST_NEXT(periph, periph_links), i++);
7044
7045 periph = SLIST_FIRST(&device->periphs);
7046 if ((i == 1)
7047 && (strncmp(periph->periph_name, "pass", 4) == 0))
7048 xpt_announce_periph(periph, NULL);
7049
7050 return(1);
7051 }
7052
7053 static void
7054 xpt_finishconfig_task(void *context, int pending)
7055 {
7056 struct periph_driver **p_drv;
7057 int i;
7058
7059 if (busses_to_config == 0) {
7060 /* Register all the peripheral drivers */
7061 /* XXX This will have to change when we have loadable modules */
7062 p_drv = periph_drivers;
7063 for (i = 0; p_drv[i] != NULL; i++) {
7064 (*p_drv[i]->init)();
7065 }
7066
7067 /*
7068 * Check for devices with no "standard" peripheral driver
7069 * attached. For any devices like that, announce the
7070 * passthrough driver so the user will see something.
7071 */
7072 xpt_for_all_devices(xptpassannouncefunc, NULL);
7073
7074 /* Release our hook so that the boot can continue. */
7075 config_intrhook_disestablish(xsoftc.xpt_config_hook);
7076 free(xsoftc.xpt_config_hook, M_CAMXPT);
7077 xsoftc.xpt_config_hook = NULL;
7078 }
7079
7080 free(context, M_CAMXPT);
7081 }
7082
7083 static void
7084 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
7085 {
7086 struct xpt_task *task;
7087
7088 if (done_ccb != NULL) {
7089 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
7090 ("xpt_finishconfig\n"));
7091 switch(done_ccb->ccb_h.func_code) {
7092 case XPT_RESET_BUS:
7093 if (done_ccb->ccb_h.status == CAM_REQ_CMP) {
7094 done_ccb->ccb_h.func_code = XPT_SCAN_BUS;
7095 done_ccb->ccb_h.cbfcnp = xpt_finishconfig;
7096 done_ccb->crcn.flags = 0;
7097 xpt_action(done_ccb);
7098 return;
7099 }
7100 /* FALLTHROUGH */
7101 case XPT_SCAN_BUS:
7102 default:
7103 xpt_free_path(done_ccb->ccb_h.path);
7104 busses_to_config--;
7105 break;
7106 }
7107 }
7108
7109 if (busses_to_config == 0) {
7110 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
7111 if (task != NULL) {
7112 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
7113 taskqueue_enqueue(taskqueue_thread, &task->task);
7114 }
7115 }
7116
7117 if (done_ccb != NULL)
7118 xpt_free_ccb(done_ccb);
7119 }
7120
7121 cam_status
7122 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
7123 struct cam_path *path)
7124 {
7125 struct ccb_setasync csa;
7126 cam_status status;
7127 int xptpath = 0;
7128
7129 if (path == NULL) {
7130 mtx_lock(&xsoftc.xpt_lock);
7131 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
7132 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
7133 if (status != CAM_REQ_CMP) {
7134 mtx_unlock(&xsoftc.xpt_lock);
7135 return (status);
7136 }
7137 xptpath = 1;
7138 }
7139
7140 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
7141 csa.ccb_h.func_code = XPT_SASYNC_CB;
7142 csa.event_enable = event;
7143 csa.callback = cbfunc;
7144 csa.callback_arg = cbarg;
7145 xpt_action((union ccb *)&csa);
7146 status = csa.ccb_h.status;
7147 if (xptpath) {
7148 xpt_free_path(path);
7149 mtx_unlock(&xsoftc.xpt_lock);
7150 }
7151 return (status);
7152 }
7153
7154 static void
7155 xptaction(struct cam_sim *sim, union ccb *work_ccb)
7156 {
7157 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
7158
7159 switch (work_ccb->ccb_h.func_code) {
7160 /* Common cases first */
7161 case XPT_PATH_INQ: /* Path routing inquiry */
7162 {
7163 struct ccb_pathinq *cpi;
7164
7165 cpi = &work_ccb->cpi;
7166 cpi->version_num = 1; /* XXX??? */
7167 cpi->hba_inquiry = 0;
7168 cpi->target_sprt = 0;
7169 cpi->hba_misc = 0;
7170 cpi->hba_eng_cnt = 0;
7171 cpi->max_target = 0;
7172 cpi->max_lun = 0;
7173 cpi->initiator_id = 0;
7174 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
7175 strncpy(cpi->hba_vid, "", HBA_IDLEN);
7176 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
7177 cpi->unit_number = sim->unit_number;
7178 cpi->bus_id = sim->bus_id;
7179 cpi->base_transfer_speed = 0;
7180 cpi->protocol = PROTO_UNSPECIFIED;
7181 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
7182 cpi->transport = XPORT_UNSPECIFIED;
7183 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
7184 cpi->ccb_h.status = CAM_REQ_CMP;
7185 xpt_done(work_ccb);
7186 break;
7187 }
7188 default:
7189 work_ccb->ccb_h.status = CAM_REQ_INVALID;
7190 xpt_done(work_ccb);
7191 break;
7192 }
7193 }
7194
7195 /*
7196 * The xpt as a "controller" has no interrupt sources, so polling
7197 * is a no-op.
7198 */
7199 static void
7200 xptpoll(struct cam_sim *sim)
7201 {
7202 }
7203
7204 void
7205 xpt_lock_buses(void)
7206 {
7207 mtx_lock(&xsoftc.xpt_topo_lock);
7208 }
7209
7210 void
7211 xpt_unlock_buses(void)
7212 {
7213 mtx_unlock(&xsoftc.xpt_topo_lock);
7214 }
7215
7216 static void
7217 camisr(void *dummy)
7218 {
7219 cam_simq_t queue;
7220 struct cam_sim *sim;
7221
7222 mtx_lock(&cam_simq_lock);
7223 TAILQ_INIT(&queue);
7224 TAILQ_CONCAT(&queue, &cam_simq, links);
7225 mtx_unlock(&cam_simq_lock);
7226
7227 while ((sim = TAILQ_FIRST(&queue)) != NULL) {
7228 TAILQ_REMOVE(&queue, sim, links);
7229 CAM_SIM_LOCK(sim);
7230 camisr_runqueue(&sim->sim_doneq);
7231 sim->flags &= ~CAM_SIM_ON_DONEQ;
7232 CAM_SIM_UNLOCK(sim);
7233 }
7234 }
7235
7236 static void
7237 camisr_runqueue(void *V_queue)
7238 {
7239 cam_isrq_t *queue = V_queue;
7240 struct ccb_hdr *ccb_h;
7241
7242 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) {
7243 int runq;
7244
7245 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe);
7246 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
7247
7248 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
7249 ("camisr\n"));
7250
7251 runq = FALSE;
7252
7253 if (ccb_h->flags & CAM_HIGH_POWER) {
7254 struct highpowerlist *hphead;
7255 union ccb *send_ccb;
7256
7257 mtx_lock(&xsoftc.xpt_lock);
7258 hphead = &xsoftc.highpowerq;
7259
7260 send_ccb = (union ccb *)STAILQ_FIRST(hphead);
7261
7262 /*
7263 * Increment the count since this command is done.
7264 */
7265 xsoftc.num_highpower++;
7266
7267 /*
7268 * Any high powered commands queued up?
7269 */
7270 if (send_ccb != NULL) {
7271
7272 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe);
7273 mtx_unlock(&xsoftc.xpt_lock);
7274
7275 xpt_release_devq(send_ccb->ccb_h.path,
7276 /*count*/1, /*runqueue*/TRUE);
7277 } else
7278 mtx_unlock(&xsoftc.xpt_lock);
7279 }
7280
7281 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
7282 struct cam_ed *dev;
7283
7284 dev = ccb_h->path->device;
7285
7286 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
7287 ccb_h->path->bus->sim->devq->send_active--;
7288 ccb_h->path->bus->sim->devq->send_openings++;
7289
7290 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
7291 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)
7292 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
7293 && (dev->ccbq.dev_active == 0))) {
7294
7295 xpt_release_devq(ccb_h->path, /*count*/1,
7296 /*run_queue*/TRUE);
7297 }
7298
7299 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
7300 && (--dev->tag_delay_count == 0))
7301 xpt_start_tags(ccb_h->path);
7302
7303 if ((dev->ccbq.queue.entries > 0)
7304 && (dev->qfrozen_cnt == 0)
7305 && (device_is_send_queued(dev) == 0)) {
7306 runq = xpt_schedule_dev_sendq(ccb_h->path->bus,
7307 dev);
7308 }
7309 }
7310
7311 if (ccb_h->status & CAM_RELEASE_SIMQ) {
7312 xpt_release_simq(ccb_h->path->bus->sim,
7313 /*run_queue*/TRUE);
7314 ccb_h->status &= ~CAM_RELEASE_SIMQ;
7315 runq = FALSE;
7316 }
7317
7318 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
7319 && (ccb_h->status & CAM_DEV_QFRZN)) {
7320 xpt_release_devq(ccb_h->path, /*count*/1,
7321 /*run_queue*/TRUE);
7322 ccb_h->status &= ~CAM_DEV_QFRZN;
7323 } else if (runq) {
7324 xpt_run_dev_sendq(ccb_h->path->bus);
7325 }
7326
7327 /* Call the peripheral driver's callback */
7328 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
7329 }
7330 }
7331
Cache object: 0a10d0e5350f834c9bfe677f0c11cbd4
|