2 * Implementation of the Common Access Method Transport (XPT) layer.
4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
29 * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $
30 * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.19 2004/11/14 16:48:36 eirikn Exp $
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/types.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
39 #include <sys/fcntl.h>
41 #include <sys/devicestat.h>
42 #include <sys/interrupt.h>
44 #include <sys/thread.h>
45 #include <sys/thread2.h>
48 #include <pc98/pc98/pc98_machdep.h> /* geometry translation */
51 #include <machine/clock.h>
52 #include <machine/ipl.h>
56 #include "cam_periph.h"
59 #include "cam_xpt_sim.h"
60 #include "cam_xpt_periph.h"
61 #include "cam_debug.h"
63 #include "scsi/scsi_all.h"
64 #include "scsi/scsi_message.h"
65 #include "scsi/scsi_pass.h"
68 /* Datastructures internal to the xpt layer */
71 * Definition of an async handler callback block. These are used to add
72 * SIMs and peripherals to the async callback lists.
75 SLIST_ENTRY(async_node) links;
76 u_int32_t event_enable; /* Async Event enables */
77 void (*callback)(void *arg, u_int32_t code,
78 struct cam_path *path, void *args);
82 SLIST_HEAD(async_list, async_node);
83 SLIST_HEAD(periph_list, cam_periph);
84 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
87 * This is the maximum number of high powered commands (e.g. start unit)
88 * that can be outstanding at a particular time.
90 #ifndef CAM_MAX_HIGHPOWER
91 #define CAM_MAX_HIGHPOWER 4
94 /* number of high powered commands that can go through right now */
95 static int num_highpower = CAM_MAX_HIGHPOWER;
98 * Structure for queueing a device in a run queue.
99 * There is one run queue for allocating new ccbs,
100 * and another for sending ccbs to the controller.
102 struct cam_ed_qinfo {
104 struct cam_ed *device;
108 * The CAM EDT (Existing Device Table) contains the device information for
109 * all devices for all busses in the system. The table contains a
110 * cam_ed structure for each device on the bus.
113 TAILQ_ENTRY(cam_ed) links;
114 struct cam_ed_qinfo alloc_ccb_entry;
115 struct cam_ed_qinfo send_ccb_entry;
116 struct cam_et *target;
119 * Queue of type drivers wanting to do
120 * work on this device.
122 struct cam_ccbq ccbq; /* Queue of pending ccbs */
123 struct async_list asyncs; /* Async callback info for this B/T/L */
124 struct periph_list periphs; /* All attached devices */
125 u_int generation; /* Generation number */
126 struct cam_periph *owner; /* Peripheral driver's ownership tag */
127 struct xpt_quirk_entry *quirk; /* Oddities about this device */
128 /* Storage for the inquiry data */
129 struct scsi_inquiry_data inq_data;
130 u_int8_t inq_flags; /*
131 * Current settings for inquiry flags.
132 * This allows us to override settings
133 * like disconnection and tagged
134 * queuing for a device.
136 u_int8_t queue_flags; /* Queue flags from the control page */
137 u_int8_t serial_num_len;
138 u_int8_t *serial_num;
139 u_int32_t qfrozen_cnt;
141 #define CAM_DEV_UNCONFIGURED 0x01
142 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02
143 #define CAM_DEV_REL_ON_COMPLETE 0x04
144 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08
145 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10
146 #define CAM_DEV_TAG_AFTER_COUNT 0x20
147 #define CAM_DEV_INQUIRY_DATA_VALID 0x40
148 u_int32_t tag_delay_count;
149 #define CAM_TAG_DELAY_COUNT 5
151 struct callout c_handle;
155 * Each target is represented by an ET (Existing Target). These
156 * entries are created when a target is successfully probed with an
157 * identify, and removed when a device fails to respond after a number
158 * of retries, or a bus rescan finds the device missing.
161 TAILQ_HEAD(, cam_ed) ed_entries;
162 TAILQ_ENTRY(cam_et) links;
164 target_id_t target_id;
167 struct timeval last_reset; /* uptime of last reset */
171 * Each bus is represented by an EB (Existing Bus). These entries
172 * are created by calls to xpt_bus_register and deleted by calls to
173 * xpt_bus_deregister.
176 TAILQ_HEAD(, cam_et) et_entries;
177 TAILQ_ENTRY(cam_eb) links;
180 struct timeval last_reset; /* uptime of last reset */
182 #define CAM_EB_RUNQ_SCHEDULED 0x01
188 struct cam_periph *periph;
190 struct cam_et *target;
191 struct cam_ed *device;
194 struct xpt_quirk_entry {
195 struct scsi_inquiry_pattern inq_pat;
197 #define CAM_QUIRK_NOLUNS 0x01
198 #define CAM_QUIRK_NOSERIAL 0x02
199 #define CAM_QUIRK_HILUNS 0x04
203 #define CAM_SCSI2_MAXLUN 8
211 u_int32_t generation;
214 static const char quantum[] = "QUANTUM";
215 static const char sony[] = "SONY";
216 static const char west_digital[] = "WDIGTL";
217 static const char samsung[] = "SAMSUNG";
218 static const char seagate[] = "SEAGATE";
219 static const char microp[] = "MICROP";
221 static struct xpt_quirk_entry xpt_quirk_table[] =
224 /* Reports QUEUE FULL for temporary resource shortages */
225 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
226 /*quirks*/0, /*mintags*/24, /*maxtags*/32
229 /* Reports QUEUE FULL for temporary resource shortages */
230 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
231 /*quirks*/0, /*mintags*/24, /*maxtags*/32
234 /* Reports QUEUE FULL for temporary resource shortages */
235 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
236 /*quirks*/0, /*mintags*/24, /*maxtags*/32
239 /* Broken tagged queuing drive */
240 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
241 /*quirks*/0, /*mintags*/0, /*maxtags*/0
244 /* Broken tagged queuing drive */
245 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
246 /*quirks*/0, /*mintags*/0, /*maxtags*/0
249 /* Broken tagged queuing drive */
250 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
251 /*quirks*/0, /*mintags*/0, /*maxtags*/0
255 * Unfortunately, the Quantum Atlas III has the same
256 * problem as the Atlas II drives above.
257 * Reported by: "Johan Granlund" <johan@granlund.nu>
259 * For future reference, the drive with the problem was:
260 * QUANTUM QM39100TD-SW N1B0
262 * It's possible that Quantum will fix the problem in later
263 * firmware revisions. If that happens, the quirk entry
264 * will need to be made specific to the firmware revisions
268 /* Reports QUEUE FULL for temporary resource shortages */
269 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
270 /*quirks*/0, /*mintags*/24, /*maxtags*/32
274 * 18 Gig Atlas III, same problem as the 9G version.
275 * Reported by: Andre Albsmeier
276 * <andre.albsmeier@mchp.siemens.de>
278 * For future reference, the drive with the problem was:
279 * QUANTUM QM318000TD-S N491
281 /* Reports QUEUE FULL for temporary resource shortages */
282 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
283 /*quirks*/0, /*mintags*/24, /*maxtags*/32
287 * Broken tagged queuing drive
288 * Reported by: Bret Ford <bford@uop.cs.uop.edu>
289 * and: Martin Renters <martin@tdc.on.ca>
291 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
292 /*quirks*/0, /*mintags*/0, /*maxtags*/0
295 * The Seagate Medalist Pro drives have very poor write
296 * performance with anything more than 2 tags.
298 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl>
299 * Drive: <SEAGATE ST36530N 1444>
301 * Reported by: Jeremy Lea <reg@shale.csir.co.za>
302 * Drive: <SEAGATE ST34520W 1281>
304 * No one has actually reported that the 9G version
305 * (ST39140*) of the Medalist Pro has the same problem, but
306 * we're assuming that it does because the 4G and 6.5G
307 * versions of the drive are broken.
310 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
311 /*quirks*/0, /*mintags*/2, /*maxtags*/2
314 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
315 /*quirks*/0, /*mintags*/2, /*maxtags*/2
318 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
319 /*quirks*/0, /*mintags*/2, /*maxtags*/2
323 * Slow when tagged queueing is enabled. Write performance
324 * steadily drops off with more and more concurrent
325 * transactions. Best sequential write performance with
326 * tagged queueing turned off and write caching turned on.
329 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp>
330 * Drive: DCAS-34330 w/ "S65A" firmware.
332 * The drive with the problem had the "S65A" firmware
333 * revision, and has also been reported (by Stephen J.
334 * Roznowski <sjr@home.net>) for a drive with the "S61A"
337 * Although no one has reported problems with the 2 gig
338 * version of the DCAS drive, the assumption is that it
339 * has the same problems as the 4 gig version. Therefore
340 * this quirk entries disables tagged queueing for all
343 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
344 /*quirks*/0, /*mintags*/0, /*maxtags*/0
347 /* Broken tagged queuing drive */
348 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
349 /*quirks*/0, /*mintags*/0, /*maxtags*/0
352 /* Broken tagged queuing drive */
353 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
354 /*quirks*/0, /*mintags*/0, /*maxtags*/0
358 * Broken tagged queuing drive.
360 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
363 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
364 /*quirks*/0, /*mintags*/0, /*maxtags*/0
368 * Slow when tagged queueing is enabled. (1.5MB/sec versus
370 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
371 * Best performance with these drives is achieved with
372 * tagged queueing turned off, and write caching turned on.
374 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
375 /*quirks*/0, /*mintags*/0, /*maxtags*/0
379 * Slow when tagged queueing is enabled. (1.5MB/sec versus
381 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
382 * Best performance with these drives is achieved with
383 * tagged queueing turned off, and write caching turned on.
385 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
386 /*quirks*/0, /*mintags*/0, /*maxtags*/0
390 * Doesn't handle queue full condition correctly,
391 * so we need to limit maxtags to what the device
392 * can handle instead of determining this automatically.
394 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
395 /*quirks*/0, /*mintags*/2, /*maxtags*/32
398 /* Really only one LUN */
399 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
400 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
403 /* I can't believe we need a quirk for DPT volumes. */
404 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
405 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS,
406 /*mintags*/0, /*maxtags*/255
410 * Many Sony CDROM drives don't like multi-LUN probing.
412 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
413 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
417 * This drive doesn't like multiple LUN probing.
418 * Submitted by: Parag Patel <parag@cgt.com>
420 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" },
421 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
424 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
425 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
429 * The 8200 doesn't like multi-lun probing, and probably
430 * don't like serial number requests either.
433 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
436 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
440 * Let's try the same as above, but for a drive that says
441 * it's an IPL-6860 but is actually an EXB 8200.
444 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
447 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
451 * These Hitachi drives don't like multi-lun probing.
452 * The PR submitter has a DK319H, but says that the Linux
453 * kernel has a similar work-around for the DK312 and DK314,
454 * so all DK31* drives are quirked here.
456 * Submitted by: Paul Haddad <paul@pth.com>
458 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
459 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
463 * This old revision of the TDC3600 is also SCSI-1, and
464 * hangs upon serial number probing.
467 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
470 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
474 * Would repond to all LUNs if asked for.
477 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
480 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
484 * Would repond to all LUNs if asked for.
487 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
490 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
493 /* Submitted by: Matthew Dodd <winter@jurai.net> */
494 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
495 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
498 /* Submitted by: Matthew Dodd <winter@jurai.net> */
499 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
500 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
503 /* TeraSolutions special settings for TRC-22 RAID */
504 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
505 /*quirks*/0, /*mintags*/55, /*maxtags*/255
508 /* Veritas Storage Appliance */
509 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
510 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
514 * Would respond to all LUNs. Device type and removable
515 * flag are jumper-selectable.
517 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
520 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
523 /* Default tagged queuing parameters for all devices */
525 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
526 /*vendor*/"*", /*product*/"*", /*revision*/"*"
528 /*quirks*/0, /*mintags*/2, /*maxtags*/255
532 static const int xpt_quirk_table_size =
533 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
537 DM_RET_FLAG_MASK = 0x0f,
540 DM_RET_DESCEND = 0x20,
542 DM_RET_ACTION_MASK = 0xf0
550 } xpt_traverse_depth;
552 struct xpt_traverse_config {
553 xpt_traverse_depth depth;
558 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
559 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
560 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
561 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
562 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
564 /* Transport layer configuration information */
565 static struct xpt_softc xsoftc;
567 /* Queues for our software interrupt handler */
568 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
569 static cam_isrq_t cam_bioq;
570 static cam_isrq_t cam_netq;
572 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */
573 static SLIST_HEAD(,ccb_hdr) ccb_freeq;
574 static u_int xpt_max_ccbs; /*
575 * Maximum size of ccb pool. Modified as
576 * devices are added/removed or have their
577 * opening counts changed.
579 static u_int xpt_ccb_count; /* Current count of allocated ccbs */
581 struct cam_periph *xpt_periph;
583 static periph_init_t xpt_periph_init;
585 static periph_init_t probe_periph_init;
587 static struct periph_driver xpt_driver =
589 xpt_periph_init, "xpt",
590 TAILQ_HEAD_INITIALIZER(xpt_driver.units)
593 static struct periph_driver probe_driver =
595 probe_periph_init, "probe",
596 TAILQ_HEAD_INITIALIZER(probe_driver.units)
599 DATA_SET(periphdriver_set, xpt_driver);
600 DATA_SET(periphdriver_set, probe_driver);
602 #define XPT_CDEV_MAJOR 104
604 static d_open_t xptopen;
605 static d_close_t xptclose;
606 static d_ioctl_t xptioctl;
608 static struct cdevsw xpt_cdevsw = {
610 /* maj */ XPT_CDEV_MAJOR,
616 /* close */ xptclose,
619 /* ioctl */ xptioctl,
622 /* strategy */ nostrategy,
627 static struct intr_config_hook *xpt_config_hook;
629 /* Registered busses */
630 static TAILQ_HEAD(,cam_eb) xpt_busses;
631 static u_int bus_generation;
633 /* Storage for debugging datastructures */
635 struct cam_path *cam_dpath;
636 u_int32_t cam_dflags;
637 u_int32_t cam_debug_delay;
640 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
641 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
645 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
646 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS,
647 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
649 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
650 || defined(CAM_DEBUG_LUN)
652 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
653 || !defined(CAM_DEBUG_LUN)
654 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
656 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
657 #else /* !CAMDEBUG */
658 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
659 #endif /* CAMDEBUG */
660 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
662 /* Our boot-time initialization hook */
663 static void xpt_init(void *);
664 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL);
666 static cam_status xpt_compile_path(struct cam_path *new_path,
667 struct cam_periph *perph,
669 target_id_t target_id,
672 static void xpt_release_path(struct cam_path *path);
674 static void xpt_async_bcast(struct async_list *async_head,
675 u_int32_t async_code,
676 struct cam_path *path,
678 static void xpt_dev_async(u_int32_t async_code,
680 struct cam_et *target,
681 struct cam_ed *device,
683 static path_id_t xptnextfreepathid(void);
684 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
685 static union ccb *xpt_get_ccb(struct cam_ed *device);
686 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
687 u_int32_t new_priority);
688 static void xpt_run_dev_allocq(struct cam_eb *bus);
689 static void xpt_run_dev_sendq(struct cam_eb *bus);
690 static timeout_t xpt_release_devq_timeout;
691 static void xpt_release_bus(struct cam_eb *bus);
692 static void xpt_release_devq_device(struct cam_ed *dev, u_int count,
694 static struct cam_et*
695 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
696 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target);
697 static struct cam_ed*
698 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
700 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target,
701 struct cam_ed *device);
702 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
703 static struct cam_eb*
704 xpt_find_bus(path_id_t path_id);
705 static struct cam_et*
706 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
707 static struct cam_ed*
708 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
709 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
710 static void xpt_scan_lun(struct cam_periph *periph,
711 struct cam_path *path, cam_flags flags,
713 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb);
714 static xpt_busfunc_t xptconfigbuscountfunc;
715 static xpt_busfunc_t xptconfigfunc;
716 static void xpt_config(void *arg);
717 static xpt_devicefunc_t xptpassannouncefunc;
718 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
719 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
720 static void xptpoll(struct cam_sim *sim);
721 static inthand2_t swi_camnet;
722 static inthand2_t swi_cambio;
723 static void camisr(cam_isrq_t *queue);
725 static void xptstart(struct cam_periph *periph, union ccb *work_ccb);
726 static void xptasync(struct cam_periph *periph,
727 u_int32_t code, cam_path *path);
729 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
730 int num_patterns, struct cam_eb *bus);
731 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
732 int num_patterns, struct cam_ed *device);
733 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
735 struct cam_periph *periph);
736 static xpt_busfunc_t xptedtbusfunc;
737 static xpt_targetfunc_t xptedttargetfunc;
738 static xpt_devicefunc_t xptedtdevicefunc;
739 static xpt_periphfunc_t xptedtperiphfunc;
740 static xpt_pdrvfunc_t xptplistpdrvfunc;
741 static xpt_periphfunc_t xptplistperiphfunc;
742 static int xptedtmatch(struct ccb_dev_match *cdm);
743 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
744 static int xptbustraverse(struct cam_eb *start_bus,
745 xpt_busfunc_t *tr_func, void *arg);
746 static int xpttargettraverse(struct cam_eb *bus,
747 struct cam_et *start_target,
748 xpt_targetfunc_t *tr_func, void *arg);
749 static int xptdevicetraverse(struct cam_et *target,
750 struct cam_ed *start_device,
751 xpt_devicefunc_t *tr_func, void *arg);
752 static int xptperiphtraverse(struct cam_ed *device,
753 struct cam_periph *start_periph,
754 xpt_periphfunc_t *tr_func, void *arg);
755 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
756 xpt_pdrvfunc_t *tr_func, void *arg);
757 static int xptpdperiphtraverse(struct periph_driver **pdrv,
758 struct cam_periph *start_periph,
759 xpt_periphfunc_t *tr_func,
761 static xpt_busfunc_t xptdefbusfunc;
762 static xpt_targetfunc_t xptdeftargetfunc;
763 static xpt_devicefunc_t xptdefdevicefunc;
764 static xpt_periphfunc_t xptdefperiphfunc;
765 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
767 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func,
770 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func,
773 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func,
776 static xpt_devicefunc_t xptsetasyncfunc;
777 static xpt_busfunc_t xptsetasyncbusfunc;
778 static cam_status xptregister(struct cam_periph *periph,
780 static cam_status proberegister(struct cam_periph *periph,
782 static void probeschedule(struct cam_periph *probe_periph);
783 static void probestart(struct cam_periph *periph, union ccb *start_ccb);
784 static void proberequestdefaultnegotiation(struct cam_periph *periph);
785 static void probedone(struct cam_periph *periph, union ccb *done_ccb);
786 static void probecleanup(struct cam_periph *periph);
787 static void xpt_find_quirk(struct cam_ed *device);
788 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts,
789 struct cam_ed *device,
791 static void xpt_toggle_tags(struct cam_path *path);
792 static void xpt_start_tags(struct cam_path *path);
793 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
795 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
797 static __inline int periph_is_queued(struct cam_periph *periph);
798 static __inline int device_is_alloc_queued(struct cam_ed *device);
799 static __inline int device_is_send_queued(struct cam_ed *device);
800 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
803 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
807 if (dev->ccbq.devq_openings > 0) {
808 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
809 cam_ccbq_resize(&dev->ccbq,
810 dev->ccbq.dev_openings
811 + dev->ccbq.dev_active);
812 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
815 * The priority of a device waiting for CCB resources
816 * is that of the the highest priority peripheral driver
819 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
820 &dev->alloc_ccb_entry.pinfo,
821 CAMQ_GET_HEAD(&dev->drvq)->priority);
830 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
834 if (dev->ccbq.dev_openings > 0) {
836 * The priority of a device waiting for controller
837 * resources is that of the the highest priority CCB
841 xpt_schedule_dev(&bus->sim->devq->send_queue,
842 &dev->send_ccb_entry.pinfo,
843 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
851 periph_is_queued(struct cam_periph *periph)
853 return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
857 device_is_alloc_queued(struct cam_ed *device)
859 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
863 device_is_send_queued(struct cam_ed *device)
865 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
869 dev_allocq_is_runnable(struct cam_devq *devq)
873 * Have space to do more work.
874 * Allowed to do work.
876 return ((devq->alloc_queue.qfrozen_cnt == 0)
877 && (devq->alloc_queue.entries > 0)
878 && (devq->alloc_openings > 0));
884 cdevsw_add(&xpt_cdevsw, 0, 0);
885 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
895 xptdone(struct cam_periph *periph, union ccb *done_ccb)
897 /* Caller will release the CCB */
898 wakeup(&done_ccb->ccb_h.cbfcnp);
902 xptopen(dev_t dev, int flags, int fmt, struct thread *td)
906 unit = minor(dev) & 0xff;
909 * Only allow read-write access.
911 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
915 * We don't allow nonblocking access.
917 if ((flags & O_NONBLOCK) != 0) {
918 printf("xpt%d: can't do nonblocking access\n", unit);
923 * We only have one transport layer right now. If someone accesses
924 * us via something other than minor number 1, point out their
928 printf("xptopen: got invalid xpt unit %d\n", unit);
932 /* Mark ourselves open */
933 xsoftc.flags |= XPT_FLAG_OPEN;
939 xptclose(dev_t dev, int flag, int fmt, struct thread *td)
943 unit = minor(dev) & 0xff;
946 * We only have one transport layer right now. If someone accesses
947 * us via something other than minor number 1, point out their
951 printf("xptclose: got invalid xpt unit %d\n", unit);
955 /* Mark ourselves closed */
956 xsoftc.flags &= ~XPT_FLAG_OPEN;
962 xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
967 unit = minor(dev) & 0xff;
970 * We only have one transport layer right now. If someone accesses
971 * us via something other than minor number 1, point out their
975 printf("xptioctl: got invalid xpt unit %d\n", unit);
981 * For the transport layer CAMIOCOMMAND ioctl, we really only want
982 * to accept CCB types that don't quite make sense to send through a
983 * passthrough driver.
989 inccb = (union ccb *)addr;
991 switch(inccb->ccb_h.func_code) {
994 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
995 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
1004 ccb = xpt_alloc_ccb();
1007 * Create a path using the bus, target, and lun the
1010 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1011 inccb->ccb_h.path_id,
1012 inccb->ccb_h.target_id,
1013 inccb->ccb_h.target_lun) !=
1019 /* Ensure all of our fields are correct */
1020 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1021 inccb->ccb_h.pinfo.priority);
1022 xpt_merge_ccb(ccb, inccb);
1023 ccb->ccb_h.cbfcnp = xptdone;
1024 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1025 bcopy(ccb, inccb, sizeof(union ccb));
1026 xpt_free_path(ccb->ccb_h.path);
1034 * This is an immediate CCB, so it's okay to
1035 * allocate it on the stack.
1039 * Create a path using the bus, target, and lun the
1042 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1043 inccb->ccb_h.path_id,
1044 inccb->ccb_h.target_id,
1045 inccb->ccb_h.target_lun) !=
1050 /* Ensure all of our fields are correct */
1051 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1052 inccb->ccb_h.pinfo.priority);
1053 xpt_merge_ccb(&ccb, inccb);
1054 ccb.ccb_h.cbfcnp = xptdone;
1056 bcopy(&ccb, inccb, sizeof(union ccb));
1057 xpt_free_path(ccb.ccb_h.path);
1061 case XPT_DEV_MATCH: {
1062 struct cam_periph_map_info mapinfo;
1063 struct cam_path *old_path;
1066 * We can't deal with physical addresses for this
1067 * type of transaction.
1069 if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1075 * Save this in case the caller had it set to
1076 * something in particular.
1078 old_path = inccb->ccb_h.path;
1081 * We really don't need a path for the matching
1082 * code. The path is needed because of the
1083 * debugging statements in xpt_action(). They
1084 * assume that the CCB has a valid path.
1086 inccb->ccb_h.path = xpt_periph->path;
1088 bzero(&mapinfo, sizeof(mapinfo));
1091 * Map the pattern and match buffers into kernel
1092 * virtual address space.
1094 error = cam_periph_mapmem(inccb, &mapinfo);
1097 inccb->ccb_h.path = old_path;
1102 * This is an immediate CCB, we can send it on directly.
1107 * Map the buffers back into user space.
1109 cam_periph_unmapmem(inccb, &mapinfo);
1111 inccb->ccb_h.path = old_path;
1123 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1124 * with the periphal driver name and unit name filled in. The other
1125 * fields don't really matter as input. The passthrough driver name
1126 * ("pass"), and unit number are passed back in the ccb. The current
1127 * device generation number, and the index into the device peripheral
1128 * driver list, and the status are also passed back. Note that
1129 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1130 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
1131 * (or rather should be) impossible for the device peripheral driver
1132 * list to change since we look at the whole thing in one pass, and
1133 * we do it with splcam protection.
1136 case CAMGETPASSTHRU: {
1138 struct cam_periph *periph;
1139 struct periph_driver **p_drv;
1143 int base_periph_found;
1147 ccb = (union ccb *)addr;
1148 unit = ccb->cgdl.unit_number;
1149 name = ccb->cgdl.periph_name;
1151 * Every 100 devices, we want to drop our spl protection to
1152 * give the software interrupt handler a chance to run.
1153 * Most systems won't run into this check, but this should
1154 * avoid starvation in the software interrupt handler in
1159 ccb = (union ccb *)addr;
1161 base_periph_found = 0;
1164 * Sanity check -- make sure we don't get a null peripheral
1167 if (*ccb->cgdl.periph_name == '\0') {
1172 /* Keep the list from changing while we traverse it */
1175 cur_generation = xsoftc.generation;
1177 /* first find our driver in the list of drivers */
1178 SET_FOREACH(p_drv, periphdriver_set) {
1179 if (strcmp((*p_drv)->driver_name, name) == 0)
1183 if (*p_drv == NULL) {
1185 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1186 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1187 *ccb->cgdl.periph_name = '\0';
1188 ccb->cgdl.unit_number = 0;
1194 * Run through every peripheral instance of this driver
1195 * and check to see whether it matches the unit passed
1196 * in by the user. If it does, get out of the loops and
1197 * find the passthrough driver associated with that
1198 * peripheral driver.
1200 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1201 periph = TAILQ_NEXT(periph, unit_links)) {
1203 if (periph->unit_number == unit) {
1205 } else if (--splbreaknum == 0) {
1209 if (cur_generation != xsoftc.generation)
1214 * If we found the peripheral driver that the user passed
1215 * in, go through all of the peripheral drivers for that
1216 * particular device and look for a passthrough driver.
1218 if (periph != NULL) {
1219 struct cam_ed *device;
1222 base_periph_found = 1;
1223 device = periph->path->device;
1224 for (i = 0, periph = device->periphs.slh_first;
1226 periph = periph->periph_links.sle_next, i++) {
1228 * Check to see whether we have a
1229 * passthrough device or not.
1231 if (strcmp(periph->periph_name, "pass") == 0) {
1233 * Fill in the getdevlist fields.
1235 strcpy(ccb->cgdl.periph_name,
1236 periph->periph_name);
1237 ccb->cgdl.unit_number =
1238 periph->unit_number;
1239 if (periph->periph_links.sle_next)
1241 CAM_GDEVLIST_MORE_DEVS;
1244 CAM_GDEVLIST_LAST_DEVICE;
1245 ccb->cgdl.generation =
1247 ccb->cgdl.index = i;
1249 * Fill in some CCB header fields
1250 * that the user may want.
1252 ccb->ccb_h.path_id =
1253 periph->path->bus->path_id;
1254 ccb->ccb_h.target_id =
1255 periph->path->target->target_id;
1256 ccb->ccb_h.target_lun =
1257 periph->path->device->lun_id;
1258 ccb->ccb_h.status = CAM_REQ_CMP;
1265 * If the periph is null here, one of two things has
1266 * happened. The first possibility is that we couldn't
1267 * find the unit number of the particular peripheral driver
1268 * that the user is asking about. e.g. the user asks for
1269 * the passthrough driver for "da11". We find the list of
1270 * "da" peripherals all right, but there is no unit 11.
1271 * The other possibility is that we went through the list
1272 * of peripheral drivers attached to the device structure,
1273 * but didn't find one with the name "pass". Either way,
1274 * we return ENOENT, since we couldn't find something.
1276 if (periph == NULL) {
1277 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1278 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1279 *ccb->cgdl.periph_name = '\0';
1280 ccb->cgdl.unit_number = 0;
1283 * It is unfortunate that this is even necessary,
1284 * but there are many, many clueless users out there.
1285 * If this is true, the user is looking for the
1286 * passthrough driver, but doesn't have one in his
1289 if (base_periph_found == 1) {
1290 printf("xptioctl: pass driver is not in the "
1292 printf("xptioctl: put \"device pass0\" in "
1293 "your kernel config file\n");
1307 /* Functions accessed by the peripheral drivers */
1312 struct cam_sim *xpt_sim;
1313 struct cam_path *path;
1314 struct cam_devq *devq;
1317 TAILQ_INIT(&xpt_busses);
1318 TAILQ_INIT(&cam_bioq);
1319 TAILQ_INIT(&cam_netq);
1320 SLIST_INIT(&ccb_freeq);
1321 STAILQ_INIT(&highpowerq);
1324 * The xpt layer is, itself, the equivelent of a SIM.
1325 * Allow 16 ccbs in the ccb pool for it. This should
1326 * give decent parallelism when we probe busses and
1327 * perform other XPT functions.
1329 devq = cam_simq_alloc(16);
1330 xpt_sim = cam_sim_alloc(xptaction,
1335 /*max_dev_transactions*/0,
1336 /*max_tagged_dev_transactions*/0,
1338 cam_simq_release(devq);
1341 xpt_bus_register(xpt_sim, /*bus #*/0);
1344 * Looking at the XPT from the SIM layer, the XPT is
1345 * the equivelent of a peripheral driver. Allocate
1346 * a peripheral driver entry for us.
1348 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1349 CAM_TARGET_WILDCARD,
1350 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1351 printf("xpt_init: xpt_create_path failed with status %#x,"
1352 " failing attach\n", status);
1356 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1357 path, NULL, 0, NULL);
1358 xpt_free_path(path);
1360 xpt_sim->softc = xpt_periph;
1363 * Register a callback for when interrupts are enabled.
1365 xpt_config_hook = malloc(sizeof(struct intr_config_hook),
1366 M_TEMP, M_INTWAIT | M_ZERO);
1367 xpt_config_hook->ich_func = xpt_config;
1368 if (config_intrhook_establish(xpt_config_hook) != 0) {
1369 free (xpt_config_hook, M_TEMP);
1370 printf("xpt_init: config_intrhook_establish failed "
1371 "- failing attach\n");
1374 /* Install our software interrupt handlers */
1375 register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet");
1376 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio");
1380 xptregister(struct cam_periph *periph, void *arg)
1382 if (periph == NULL) {
1383 printf("xptregister: periph was NULL!!\n");
1384 return(CAM_REQ_CMP_ERR);
1387 periph->softc = NULL;
1389 xpt_periph = periph;
1391 return(CAM_REQ_CMP);
1395 xpt_add_periph(struct cam_periph *periph)
1397 struct cam_ed *device;
1399 struct periph_list *periph_head;
1401 device = periph->path->device;
1403 periph_head = &device->periphs;
1405 status = CAM_REQ_CMP;
1407 if (device != NULL) {
1411 * Make room for this peripheral
1412 * so it will fit in the queue
1413 * when it's scheduled to run
1416 status = camq_resize(&device->drvq,
1417 device->drvq.array_size + 1);
1419 device->generation++;
1421 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1426 xsoftc.generation++;
1432 xpt_remove_periph(struct cam_periph *periph)
1434 struct cam_ed *device;
1436 device = periph->path->device;
1438 if (device != NULL) {
1440 struct periph_list *periph_head;
1442 periph_head = &device->periphs;
1444 /* Release the slot for this peripheral */
1446 camq_resize(&device->drvq, device->drvq.array_size - 1);
1448 device->generation++;
1450 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1455 xsoftc.generation++;
1460 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1464 struct cam_path *path;
1465 struct ccb_trans_settings cts;
1467 path = periph->path;
1469 * To ensure that this is printed in one piece,
1470 * mask out CAM interrupts.
1473 printf("%s%d at %s%d bus %d target %d lun %d\n",
1474 periph->periph_name, periph->unit_number,
1475 path->bus->sim->sim_name,
1476 path->bus->sim->unit_number,
1477 path->bus->sim->bus_id,
1478 path->target->target_id,
1479 path->device->lun_id);
1480 printf("%s%d: ", periph->periph_name, periph->unit_number);
1481 scsi_print_inquiry(&path->device->inq_data);
1483 && (path->device->serial_num_len > 0)) {
1484 /* Don't wrap the screen - print only the first 60 chars */
1485 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1486 periph->unit_number, path->device->serial_num);
1488 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1489 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1490 cts.flags = CCB_TRANS_CURRENT_SETTINGS;
1491 xpt_action((union ccb*)&cts);
1492 if (cts.ccb_h.status == CAM_REQ_CMP) {
1496 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1497 && cts.sync_offset != 0) {
1498 freq = scsi_calc_syncsrate(cts.sync_period);
1501 struct ccb_pathinq cpi;
1503 /* Ask the SIM for its base transfer speed */
1504 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1505 cpi.ccb_h.func_code = XPT_PATH_INQ;
1506 xpt_action((union ccb *)&cpi);
1508 speed = cpi.base_transfer_speed;
1511 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0)
1512 speed *= (0x01 << cts.bus_width);
1515 printf("%s%d: %d.%03dMB/s transfers",
1516 periph->periph_name, periph->unit_number,
1519 printf("%s%d: %dKB/s transfers", periph->periph_name,
1520 periph->unit_number, speed);
1521 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1522 && cts.sync_offset != 0) {
1523 printf(" (%d.%03dMHz, offset %d", freq / 1000,
1524 freq % 1000, cts.sync_offset);
1526 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0
1527 && cts.bus_width > 0) {
1528 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1529 && cts.sync_offset != 0) {
1534 printf("%dbit)", 8 * (0x01 << cts.bus_width));
1535 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1536 && cts.sync_offset != 0) {
1540 if (path->device->inq_flags & SID_CmdQue
1541 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1542 printf(", Tagged Queueing Enabled");
1546 } else if (path->device->inq_flags & SID_CmdQue
1547 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1548 printf("%s%d: Tagged Queueing Enabled\n",
1549 periph->periph_name, periph->unit_number);
1553 * We only want to print the caller's announce string if they've
1556 if (announce_string != NULL)
1557 printf("%s%d: %s\n", periph->periph_name,
1558 periph->unit_number, announce_string);
1563 static dev_match_ret
1564 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns,
1567 dev_match_ret retval;
1570 retval = DM_RET_NONE;
1573 * If we aren't given something to match against, that's an error.
1576 return(DM_RET_ERROR);
1579 * If there are no match entries, then this bus matches no
1582 if ((patterns == NULL) || (num_patterns == 0))
1583 return(DM_RET_DESCEND | DM_RET_COPY);
1585 for (i = 0; i < num_patterns; i++) {
1586 struct bus_match_pattern *cur_pattern;
1589 * If the pattern in question isn't for a bus node, we
1590 * aren't interested. However, we do indicate to the
1591 * calling routine that we should continue descending the
1592 * tree, since the user wants to match against lower-level
1595 if (patterns[i].type != DEV_MATCH_BUS) {
1596 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1597 retval |= DM_RET_DESCEND;
1601 cur_pattern = &patterns[i].pattern.bus_pattern;
1604 * If they want to match any bus node, we give them any
1607 if (cur_pattern->flags == BUS_MATCH_ANY) {
1608 /* set the copy flag */
1609 retval |= DM_RET_COPY;
1612 * If we've already decided on an action, go ahead
1615 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1620 * Not sure why someone would do this...
1622 if (cur_pattern->flags == BUS_MATCH_NONE)
1625 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1626 && (cur_pattern->path_id != bus->path_id))
1629 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1630 && (cur_pattern->bus_id != bus->sim->bus_id))
1633 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1634 && (cur_pattern->unit_number != bus->sim->unit_number))
1637 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1638 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1643 * If we get to this point, the user definitely wants
1644 * information on this bus. So tell the caller to copy the
1647 retval |= DM_RET_COPY;
1650 * If the return action has been set to descend, then we
1651 * know that we've already seen a non-bus matching
1652 * expression, therefore we need to further descend the tree.
1653 * This won't change by continuing around the loop, so we
1654 * go ahead and return. If we haven't seen a non-bus
1655 * matching expression, we keep going around the loop until
1656 * we exhaust the matching expressions. We'll set the stop
1657 * flag once we fall out of the loop.
1659 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1664 * If the return action hasn't been set to descend yet, that means
1665 * we haven't seen anything other than bus matching patterns. So
1666 * tell the caller to stop descending the tree -- the user doesn't
1667 * want to match against lower level tree elements.
1669 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1670 retval |= DM_RET_STOP;
1675 static dev_match_ret
1676 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns,
1677 struct cam_ed *device)
1679 dev_match_ret retval;
1682 retval = DM_RET_NONE;
1685 * If we aren't given something to match against, that's an error.
1688 return(DM_RET_ERROR);
1691 * If there are no match entries, then this device matches no
1694 if ((patterns == NULL) || (patterns == 0))
1695 return(DM_RET_DESCEND | DM_RET_COPY);
1697 for (i = 0; i < num_patterns; i++) {
1698 struct device_match_pattern *cur_pattern;
1701 * If the pattern in question isn't for a device node, we
1702 * aren't interested.
1704 if (patterns[i].type != DEV_MATCH_DEVICE) {
1705 if ((patterns[i].type == DEV_MATCH_PERIPH)
1706 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1707 retval |= DM_RET_DESCEND;
1711 cur_pattern = &patterns[i].pattern.device_pattern;
1714 * If they want to match any device node, we give them any
1717 if (cur_pattern->flags == DEV_MATCH_ANY) {
1718 /* set the copy flag */
1719 retval |= DM_RET_COPY;
1723 * If we've already decided on an action, go ahead
1726 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1731 * Not sure why someone would do this...
1733 if (cur_pattern->flags == DEV_MATCH_NONE)
1736 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1737 && (cur_pattern->path_id != device->target->bus->path_id))
1740 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1741 && (cur_pattern->target_id != device->target->target_id))
1744 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1745 && (cur_pattern->target_lun != device->lun_id))
1748 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1749 && (cam_quirkmatch((caddr_t)&device->inq_data,
1750 (caddr_t)&cur_pattern->inq_pat,
1751 1, sizeof(cur_pattern->inq_pat),
1752 scsi_static_inquiry_match) == NULL))
1756 * If we get to this point, the user definitely wants
1757 * information on this device. So tell the caller to copy
1760 retval |= DM_RET_COPY;
1763 * If the return action has been set to descend, then we
1764 * know that we've already seen a peripheral matching
1765 * expression, therefore we need to further descend the tree.
1766 * This won't change by continuing around the loop, so we
1767 * go ahead and return. If we haven't seen a peripheral
1768 * matching expression, we keep going around the loop until
1769 * we exhaust the matching expressions. We'll set the stop
1770 * flag once we fall out of the loop.
1772 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1777 * If the return action hasn't been set to descend yet, that means
1778 * we haven't seen any peripheral matching patterns. So tell the
1779 * caller to stop descending the tree -- the user doesn't want to
1780 * match against lower level tree elements.
1782 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1783 retval |= DM_RET_STOP;
1789 * Match a single peripheral against any number of match patterns.
1791 static dev_match_ret
1792 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns,
1793 struct cam_periph *periph)
1795 dev_match_ret retval;
1799 * If we aren't given something to match against, that's an error.
1802 return(DM_RET_ERROR);
1805 * If there are no match entries, then this peripheral matches no
1808 if ((patterns == NULL) || (num_patterns == 0))
1809 return(DM_RET_STOP | DM_RET_COPY);
1812 * There aren't any nodes below a peripheral node, so there's no
1813 * reason to descend the tree any further.
1815 retval = DM_RET_STOP;
1817 for (i = 0; i < num_patterns; i++) {
1818 struct periph_match_pattern *cur_pattern;
1821 * If the pattern in question isn't for a peripheral, we
1822 * aren't interested.
1824 if (patterns[i].type != DEV_MATCH_PERIPH)
1827 cur_pattern = &patterns[i].pattern.periph_pattern;
1830 * If they want to match on anything, then we will do so.
1832 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1833 /* set the copy flag */
1834 retval |= DM_RET_COPY;
1837 * We've already set the return action to stop,
1838 * since there are no nodes below peripherals in
1845 * Not sure why someone would do this...
1847 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1850 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1851 && (cur_pattern->path_id != periph->path->bus->path_id))
1855 * For the target and lun id's, we have to make sure the
1856 * target and lun pointers aren't NULL. The xpt peripheral
1857 * has a wildcard target and device.
1859 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1860 && ((periph->path->target == NULL)
1861 ||(cur_pattern->target_id != periph->path->target->target_id)))
1864 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1865 && ((periph->path->device == NULL)
1866 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1869 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1870 && (cur_pattern->unit_number != periph->unit_number))
1873 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1874 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1879 * If we get to this point, the user definitely wants
1880 * information on this peripheral. So tell the caller to
1881 * copy the data out.
1883 retval |= DM_RET_COPY;
1886 * The return action has already been set to stop, since
1887 * peripherals don't have any nodes below them in the EDT.
1893 * If we get to this point, the peripheral that was passed in
1894 * doesn't match any of the patterns.
1900 xptedtbusfunc(struct cam_eb *bus, void *arg)
1902 struct ccb_dev_match *cdm;
1903 dev_match_ret retval;
1905 cdm = (struct ccb_dev_match *)arg;
1908 * If our position is for something deeper in the tree, that means
1909 * that we've already seen this node. So, we keep going down.
1911 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1912 && (cdm->pos.cookie.bus == bus)
1913 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1914 && (cdm->pos.cookie.target != NULL))
1915 retval = DM_RET_DESCEND;
1917 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1920 * If we got an error, bail out of the search.
1922 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1923 cdm->status = CAM_DEV_MATCH_ERROR;
1928 * If the copy flag is set, copy this bus out.
1930 if (retval & DM_RET_COPY) {
1933 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1934 sizeof(struct dev_match_result));
1937 * If we don't have enough space to put in another
1938 * match result, save our position and tell the
1939 * user there are more devices to check.
1941 if (spaceleft < sizeof(struct dev_match_result)) {
1942 bzero(&cdm->pos, sizeof(cdm->pos));
1943 cdm->pos.position_type =
1944 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1946 cdm->pos.cookie.bus = bus;
1947 cdm->pos.generations[CAM_BUS_GENERATION]=
1949 cdm->status = CAM_DEV_MATCH_MORE;
1952 j = cdm->num_matches;
1954 cdm->matches[j].type = DEV_MATCH_BUS;
1955 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1956 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1957 cdm->matches[j].result.bus_result.unit_number =
1958 bus->sim->unit_number;
1959 strncpy(cdm->matches[j].result.bus_result.dev_name,
1960 bus->sim->sim_name, DEV_IDLEN);
1964 * If the user is only interested in busses, there's no
1965 * reason to descend to the next level in the tree.
1967 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1971 * If there is a target generation recorded, check it to
1972 * make sure the target list hasn't changed.
1974 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1975 && (bus == cdm->pos.cookie.bus)
1976 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1977 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
1978 && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
1980 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1984 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1985 && (cdm->pos.cookie.bus == bus)
1986 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1987 && (cdm->pos.cookie.target != NULL))
1988 return(xpttargettraverse(bus,
1989 (struct cam_et *)cdm->pos.cookie.target,
1990 xptedttargetfunc, arg));
1992 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
1996 xptedttargetfunc(struct cam_et *target, void *arg)
1998 struct ccb_dev_match *cdm;
2000 cdm = (struct ccb_dev_match *)arg;
2003 * If there is a device list generation recorded, check it to
2004 * make sure the device list hasn't changed.
2006 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2007 && (cdm->pos.cookie.bus == target->bus)
2008 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2009 && (cdm->pos.cookie.target == target)
2010 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2011 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2012 && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2013 target->generation)) {
2014 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2018 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2019 && (cdm->pos.cookie.bus == target->bus)
2020 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2021 && (cdm->pos.cookie.target == target)
2022 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2023 && (cdm->pos.cookie.device != NULL))
2024 return(xptdevicetraverse(target,
2025 (struct cam_ed *)cdm->pos.cookie.device,
2026 xptedtdevicefunc, arg));
2028 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2032 xptedtdevicefunc(struct cam_ed *device, void *arg)
2035 struct ccb_dev_match *cdm;
2036 dev_match_ret retval;
2038 cdm = (struct ccb_dev_match *)arg;
2041 * If our position is for something deeper in the tree, that means
2042 * that we've already seen this node. So, we keep going down.
2044 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2045 && (cdm->pos.cookie.device == device)
2046 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2047 && (cdm->pos.cookie.periph != NULL))
2048 retval = DM_RET_DESCEND;
2050 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2053 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2054 cdm->status = CAM_DEV_MATCH_ERROR;
2059 * If the copy flag is set, copy this device out.
2061 if (retval & DM_RET_COPY) {
2064 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2065 sizeof(struct dev_match_result));
2068 * If we don't have enough space to put in another
2069 * match result, save our position and tell the
2070 * user there are more devices to check.
2072 if (spaceleft < sizeof(struct dev_match_result)) {
2073 bzero(&cdm->pos, sizeof(cdm->pos));
2074 cdm->pos.position_type =
2075 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2076 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2078 cdm->pos.cookie.bus = device->target->bus;
2079 cdm->pos.generations[CAM_BUS_GENERATION]=
2081 cdm->pos.cookie.target = device->target;
2082 cdm->pos.generations[CAM_TARGET_GENERATION] =
2083 device->target->bus->generation;
2084 cdm->pos.cookie.device = device;
2085 cdm->pos.generations[CAM_DEV_GENERATION] =
2086 device->target->generation;
2087 cdm->status = CAM_DEV_MATCH_MORE;
2090 j = cdm->num_matches;
2092 cdm->matches[j].type = DEV_MATCH_DEVICE;
2093 cdm->matches[j].result.device_result.path_id =
2094 device->target->bus->path_id;
2095 cdm->matches[j].result.device_result.target_id =
2096 device->target->target_id;
2097 cdm->matches[j].result.device_result.target_lun =
2099 bcopy(&device->inq_data,
2100 &cdm->matches[j].result.device_result.inq_data,
2101 sizeof(struct scsi_inquiry_data));
2103 /* Let the user know whether this device is unconfigured */
2104 if (device->flags & CAM_DEV_UNCONFIGURED)
2105 cdm->matches[j].result.device_result.flags =
2106 DEV_RESULT_UNCONFIGURED;
2108 cdm->matches[j].result.device_result.flags =
2113 * If the user isn't interested in peripherals, don't descend
2114 * the tree any further.
2116 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2120 * If there is a peripheral list generation recorded, make sure
2121 * it hasn't changed.
2123 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2124 && (device->target->bus == cdm->pos.cookie.bus)
2125 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2126 && (device->target == cdm->pos.cookie.target)
2127 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2128 && (device == cdm->pos.cookie.device)
2129 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2130 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2131 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2132 device->generation)){
2133 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2137 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2138 && (cdm->pos.cookie.bus == device->target->bus)
2139 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2140 && (cdm->pos.cookie.target == device->target)
2141 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2142 && (cdm->pos.cookie.device == device)
2143 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2144 && (cdm->pos.cookie.periph != NULL))
2145 return(xptperiphtraverse(device,
2146 (struct cam_periph *)cdm->pos.cookie.periph,
2147 xptedtperiphfunc, arg));
2149 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2153 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2155 struct ccb_dev_match *cdm;
2156 dev_match_ret retval;
2158 cdm = (struct ccb_dev_match *)arg;
2160 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2162 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2163 cdm->status = CAM_DEV_MATCH_ERROR;
2168 * If the copy flag is set, copy this peripheral out.
2170 if (retval & DM_RET_COPY) {
2173 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2174 sizeof(struct dev_match_result));
2177 * If we don't have enough space to put in another
2178 * match result, save our position and tell the
2179 * user there are more devices to check.
2181 if (spaceleft < sizeof(struct dev_match_result)) {
2182 bzero(&cdm->pos, sizeof(cdm->pos));
2183 cdm->pos.position_type =
2184 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2185 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2188 cdm->pos.cookie.bus = periph->path->bus;
2189 cdm->pos.generations[CAM_BUS_GENERATION]=
2191 cdm->pos.cookie.target = periph->path->target;
2192 cdm->pos.generations[CAM_TARGET_GENERATION] =
2193 periph->path->bus->generation;
2194 cdm->pos.cookie.device = periph->path->device;
2195 cdm->pos.generations[CAM_DEV_GENERATION] =
2196 periph->path->target->generation;
2197 cdm->pos.cookie.periph = periph;
2198 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2199 periph->path->device->generation;
2200 cdm->status = CAM_DEV_MATCH_MORE;
2204 j = cdm->num_matches;
2206 cdm->matches[j].type = DEV_MATCH_PERIPH;
2207 cdm->matches[j].result.periph_result.path_id =
2208 periph->path->bus->path_id;
2209 cdm->matches[j].result.periph_result.target_id =
2210 periph->path->target->target_id;
2211 cdm->matches[j].result.periph_result.target_lun =
2212 periph->path->device->lun_id;
2213 cdm->matches[j].result.periph_result.unit_number =
2214 periph->unit_number;
2215 strncpy(cdm->matches[j].result.periph_result.periph_name,
2216 periph->periph_name, DEV_IDLEN);
2223 xptedtmatch(struct ccb_dev_match *cdm)
2227 cdm->num_matches = 0;
2230 * Check the bus list generation. If it has changed, the user
2231 * needs to reset everything and start over.
2233 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2234 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2235 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2236 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2240 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2241 && (cdm->pos.cookie.bus != NULL))
2242 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2243 xptedtbusfunc, cdm);
2245 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2248 * If we get back 0, that means that we had to stop before fully
2249 * traversing the EDT. It also means that one of the subroutines
2250 * has set the status field to the proper value. If we get back 1,
2251 * we've fully traversed the EDT and copied out any matching entries.
2254 cdm->status = CAM_DEV_MATCH_LAST;
2260 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2262 struct ccb_dev_match *cdm;
2264 cdm = (struct ccb_dev_match *)arg;
2266 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2267 && (cdm->pos.cookie.pdrv == pdrv)
2268 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2269 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2270 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2271 (*pdrv)->generation)) {
2272 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2276 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2277 && (cdm->pos.cookie.pdrv == pdrv)
2278 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2279 && (cdm->pos.cookie.periph != NULL))
2280 return(xptpdperiphtraverse(pdrv,
2281 (struct cam_periph *)cdm->pos.cookie.periph,
2282 xptplistperiphfunc, arg));
2284 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2288 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2290 struct ccb_dev_match *cdm;
2291 dev_match_ret retval;
2293 cdm = (struct ccb_dev_match *)arg;
2295 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2297 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2298 cdm->status = CAM_DEV_MATCH_ERROR;
2303 * If the copy flag is set, copy this peripheral out.
2305 if (retval & DM_RET_COPY) {
2308 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2309 sizeof(struct dev_match_result));
2312 * If we don't have enough space to put in another
2313 * match result, save our position and tell the
2314 * user there are more devices to check.
2316 if (spaceleft < sizeof(struct dev_match_result)) {
2317 struct periph_driver **pdrv;
2320 bzero(&cdm->pos, sizeof(cdm->pos));
2321 cdm->pos.position_type =
2322 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2326 * This may look a bit non-sensical, but it is
2327 * actually quite logical. There are very few
2328 * peripheral drivers, and bloating every peripheral
2329 * structure with a pointer back to its parent
2330 * peripheral driver linker set entry would cost
2331 * more in the long run than doing this quick lookup.
2333 SET_FOREACH(pdrv, periphdriver_set) {
2334 if (strcmp((*pdrv)->driver_name,
2335 periph->periph_name) == 0)
2340 cdm->status = CAM_DEV_MATCH_ERROR;
2344 cdm->pos.cookie.pdrv = pdrv;
2346 * The periph generation slot does double duty, as
2347 * does the periph pointer slot. They are used for
2348 * both edt and pdrv lookups and positioning.
2350 cdm->pos.cookie.periph = periph;
2351 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2352 (*pdrv)->generation;
2353 cdm->status = CAM_DEV_MATCH_MORE;
2357 j = cdm->num_matches;
2359 cdm->matches[j].type = DEV_MATCH_PERIPH;
2360 cdm->matches[j].result.periph_result.path_id =
2361 periph->path->bus->path_id;
2364 * The transport layer peripheral doesn't have a target or
2367 if (periph->path->target)
2368 cdm->matches[j].result.periph_result.target_id =
2369 periph->path->target->target_id;
2371 cdm->matches[j].result.periph_result.target_id = -1;
2373 if (periph->path->device)
2374 cdm->matches[j].result.periph_result.target_lun =
2375 periph->path->device->lun_id;
2377 cdm->matches[j].result.periph_result.target_lun = -1;
2379 cdm->matches[j].result.periph_result.unit_number =
2380 periph->unit_number;
2381 strncpy(cdm->matches[j].result.periph_result.periph_name,
2382 periph->periph_name, DEV_IDLEN);
2389 xptperiphlistmatch(struct ccb_dev_match *cdm)
2393 cdm->num_matches = 0;
2396 * At this point in the edt traversal function, we check the bus
2397 * list generation to make sure that no busses have been added or
2398 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2399 * For the peripheral driver list traversal function, however, we
2400 * don't have to worry about new peripheral driver types coming or
2401 * going; they're in a linker set, and therefore can't change
2402 * without a recompile.
2405 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2406 && (cdm->pos.cookie.pdrv != NULL))
2407 ret = xptpdrvtraverse(
2408 (struct periph_driver **)cdm->pos.cookie.pdrv,
2409 xptplistpdrvfunc, cdm);
2411 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2414 * If we get back 0, that means that we had to stop before fully
2415 * traversing the peripheral driver tree. It also means that one of
2416 * the subroutines has set the status field to the proper value. If
2417 * we get back 1, we've fully traversed the EDT and copied out any
2421 cdm->status = CAM_DEV_MATCH_LAST;
2427 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2429 struct cam_eb *bus, *next_bus;
2434 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2437 next_bus = TAILQ_NEXT(bus, links);
2439 retval = tr_func(bus, arg);
2448 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2449 xpt_targetfunc_t *tr_func, void *arg)
2451 struct cam_et *target, *next_target;
2455 for (target = (start_target ? start_target :
2456 TAILQ_FIRST(&bus->et_entries));
2457 target != NULL; target = next_target) {
2459 next_target = TAILQ_NEXT(target, links);
2461 retval = tr_func(target, arg);
2471 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2472 xpt_devicefunc_t *tr_func, void *arg)
2474 struct cam_ed *device, *next_device;
2478 for (device = (start_device ? start_device :
2479 TAILQ_FIRST(&target->ed_entries));
2481 device = next_device) {
2483 next_device = TAILQ_NEXT(device, links);
2485 retval = tr_func(device, arg);
2495 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2496 xpt_periphfunc_t *tr_func, void *arg)
2498 struct cam_periph *periph, *next_periph;
2503 for (periph = (start_periph ? start_periph :
2504 SLIST_FIRST(&device->periphs));
2506 periph = next_periph) {
2508 next_periph = SLIST_NEXT(periph, periph_links);
2510 retval = tr_func(periph, arg);
2519 xptpdrvtraverse(struct periph_driver **start_pdrv,
2520 xpt_pdrvfunc_t *tr_func, void *arg)
2522 struct periph_driver **pdrv;
2528 * We don't traverse the peripheral driver list like we do the
2529 * other lists, because it is a linker set, and therefore cannot be
2530 * changed during runtime. If the peripheral driver list is ever
2531 * re-done to be something other than a linker set (i.e. it can
2532 * change while the system is running), the list traversal should
2533 * be modified to work like the other traversal functions.
2535 SET_FOREACH(pdrv, periphdriver_set) {
2536 if (start_pdrv == NULL || start_pdrv == pdrv) {
2537 retval = tr_func(pdrv, arg);
2540 start_pdrv = NULL; /* traverse remainder */
2547 xptpdperiphtraverse(struct periph_driver **pdrv,
2548 struct cam_periph *start_periph,
2549 xpt_periphfunc_t *tr_func, void *arg)
2551 struct cam_periph *periph, *next_periph;
2556 for (periph = (start_periph ? start_periph :
2557 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2558 periph = next_periph) {
2560 next_periph = TAILQ_NEXT(periph, unit_links);
2562 retval = tr_func(periph, arg);
2570 xptdefbusfunc(struct cam_eb *bus, void *arg)
2572 struct xpt_traverse_config *tr_config;
2574 tr_config = (struct xpt_traverse_config *)arg;
2576 if (tr_config->depth == XPT_DEPTH_BUS) {
2577 xpt_busfunc_t *tr_func;
2579 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2581 return(tr_func(bus, tr_config->tr_arg));
2583 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2587 xptdeftargetfunc(struct cam_et *target, void *arg)
2589 struct xpt_traverse_config *tr_config;
2591 tr_config = (struct xpt_traverse_config *)arg;
2593 if (tr_config->depth == XPT_DEPTH_TARGET) {
2594 xpt_targetfunc_t *tr_func;
2596 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2598 return(tr_func(target, tr_config->tr_arg));
2600 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2604 xptdefdevicefunc(struct cam_ed *device, void *arg)
2606 struct xpt_traverse_config *tr_config;
2608 tr_config = (struct xpt_traverse_config *)arg;
2610 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2611 xpt_devicefunc_t *tr_func;
2613 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2615 return(tr_func(device, tr_config->tr_arg));
2617 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2621 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2623 struct xpt_traverse_config *tr_config;
2624 xpt_periphfunc_t *tr_func;
2626 tr_config = (struct xpt_traverse_config *)arg;
2628 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2631 * Unlike the other default functions, we don't check for depth
2632 * here. The peripheral driver level is the last level in the EDT,
2633 * so if we're here, we should execute the function in question.
2635 return(tr_func(periph, tr_config->tr_arg));
2639 * Execute the given function for every bus in the EDT.
2642 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2644 struct xpt_traverse_config tr_config;
2646 tr_config.depth = XPT_DEPTH_BUS;
2647 tr_config.tr_func = tr_func;
2648 tr_config.tr_arg = arg;
2650 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2655 * Execute the given function for every target in the EDT.
2658 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2660 struct xpt_traverse_config tr_config;
2662 tr_config.depth = XPT_DEPTH_TARGET;
2663 tr_config.tr_func = tr_func;
2664 tr_config.tr_arg = arg;
2666 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2668 #endif /* notusedyet */
2671 * Execute the given function for every device in the EDT.
2674 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2676 struct xpt_traverse_config tr_config;
2678 tr_config.depth = XPT_DEPTH_DEVICE;
2679 tr_config.tr_func = tr_func;
2680 tr_config.tr_arg = arg;
2682 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2687 * Execute the given function for every peripheral in the EDT.
2690 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2692 struct xpt_traverse_config tr_config;
2694 tr_config.depth = XPT_DEPTH_PERIPH;
2695 tr_config.tr_func = tr_func;
2696 tr_config.tr_arg = arg;
2698 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2700 #endif /* notusedyet */
2703 xptsetasyncfunc(struct cam_ed *device, void *arg)
2705 struct cam_path path;
2706 struct ccb_getdev cgd;
2707 struct async_node *cur_entry;
2709 cur_entry = (struct async_node *)arg;
2712 * Don't report unconfigured devices (Wildcard devs,
2713 * devices only for target mode, device instances
2714 * that have been invalidated but are waiting for
2715 * their last reference count to be released).
2717 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2720 xpt_compile_path(&path,
2722 device->target->bus->path_id,
2723 device->target->target_id,
2725 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2726 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2727 xpt_action((union ccb *)&cgd);
2728 cur_entry->callback(cur_entry->callback_arg,
2731 xpt_release_path(&path);
2737 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2739 struct cam_path path;
2740 struct ccb_pathinq cpi;
2741 struct async_node *cur_entry;
2743 cur_entry = (struct async_node *)arg;
2745 xpt_compile_path(&path, /*periph*/NULL,
2747 CAM_TARGET_WILDCARD,
2749 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2750 cpi.ccb_h.func_code = XPT_PATH_INQ;
2751 xpt_action((union ccb *)&cpi);
2752 cur_entry->callback(cur_entry->callback_arg,
2755 xpt_release_path(&path);
2761 xpt_action(union ccb *start_ccb)
2765 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2767 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2769 iopl = splsoftcam();
2770 switch (start_ccb->ccb_h.func_code) {
2774 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
2775 struct cam_path *path;
2777 path = start_ccb->ccb_h.path;
2781 * For the sake of compatibility with SCSI-1
2782 * devices that may not understand the identify
2783 * message, we include lun information in the
2784 * second byte of all commands. SCSI-1 specifies
2785 * that luns are a 3 bit value and reserves only 3
2786 * bits for lun information in the CDB. Later
2787 * revisions of the SCSI spec allow for more than 8
2788 * luns, but have deprecated lun information in the
2789 * CDB. So, if the lun won't fit, we must omit.
2791 * Also be aware that during initial probing for devices,
2792 * the inquiry information is unknown but initialized to 0.
2793 * This means that this code will be exercised while probing
2794 * devices with an ANSI revision greater than 2.
2796 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2
2797 && start_ccb->ccb_h.target_lun < 8
2798 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2800 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2801 start_ccb->ccb_h.target_lun << 5;
2803 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2804 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
2805 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
2806 &path->device->inq_data),
2807 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
2808 cdb_str, sizeof(cdb_str))));
2812 case XPT_CONT_TARGET_IO:
2813 start_ccb->csio.sense_resid = 0;
2814 start_ccb->csio.resid = 0;
2819 struct cam_path *path;
2823 path = start_ccb->ccb_h.path;
2826 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2827 if (path->device->qfrozen_cnt == 0)
2828 runq = xpt_schedule_dev_sendq(path->bus, path->device);
2833 xpt_run_dev_sendq(path->bus);
2836 case XPT_SET_TRAN_SETTINGS:
2838 xpt_set_transfer_settings(&start_ccb->cts,
2839 start_ccb->ccb_h.path->device,
2840 /*async_update*/FALSE);
2843 case XPT_CALC_GEOMETRY:
2845 struct cam_sim *sim;
2847 /* Filter out garbage */
2848 if (start_ccb->ccg.block_size == 0
2849 || start_ccb->ccg.volume_size == 0) {
2850 start_ccb->ccg.cylinders = 0;
2851 start_ccb->ccg.heads = 0;
2852 start_ccb->ccg.secs_per_track = 0;
2853 start_ccb->ccb_h.status = CAM_REQ_CMP;
2858 * In a PC-98 system, geometry translation depens on
2859 * the "real" device geometry obtained from mode page 4.
2860 * SCSI geometry translation is performed in the
2861 * initialization routine of the SCSI BIOS and the result
2862 * stored in host memory. If the translation is available
2863 * in host memory, use it. If not, rely on the default
2864 * translation the device driver performs.
2866 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2867 start_ccb->ccb_h.status = CAM_REQ_CMP;
2871 sim = start_ccb->ccb_h.path->bus->sim;
2872 (*(sim->sim_action))(sim, start_ccb);
2877 union ccb* abort_ccb;
2880 abort_ccb = start_ccb->cab.abort_ccb;
2881 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2883 if (abort_ccb->ccb_h.pinfo.index >= 0) {
2884 struct cam_ccbq *ccbq;
2886 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
2887 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2888 abort_ccb->ccb_h.status =
2889 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2890 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2892 xpt_done(abort_ccb);
2894 start_ccb->ccb_h.status = CAM_REQ_CMP;
2897 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2898 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2900 * We've caught this ccb en route to
2901 * the SIM. Flag it for abort and the
2902 * SIM will do so just before starting
2903 * real work on the CCB.
2905 abort_ccb->ccb_h.status =
2906 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2907 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2908 start_ccb->ccb_h.status = CAM_REQ_CMP;
2912 if (XPT_FC_IS_QUEUED(abort_ccb)
2913 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2915 * It's already completed but waiting
2916 * for our SWI to get to it.
2918 start_ccb->ccb_h.status = CAM_UA_ABORT;
2922 * If we weren't able to take care of the abort request
2923 * in the XPT, pass the request down to the SIM for processing.
2927 case XPT_ACCEPT_TARGET_IO:
2929 case XPT_IMMED_NOTIFY:
2930 case XPT_NOTIFY_ACK:
2931 case XPT_GET_TRAN_SETTINGS:
2934 struct cam_sim *sim;
2936 sim = start_ccb->ccb_h.path->bus->sim;
2937 (*(sim->sim_action))(sim, start_ccb);
2942 struct cam_sim *sim;
2944 sim = start_ccb->ccb_h.path->bus->sim;
2945 (*(sim->sim_action))(sim, start_ccb);
2948 case XPT_PATH_STATS:
2949 start_ccb->cpis.last_reset =
2950 start_ccb->ccb_h.path->bus->last_reset;
2951 start_ccb->ccb_h.status = CAM_REQ_CMP;
2958 dev = start_ccb->ccb_h.path->device;
2960 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2961 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2963 struct ccb_getdev *cgd;
2967 cgd = &start_ccb->cgd;
2968 bus = cgd->ccb_h.path->bus;
2969 tar = cgd->ccb_h.path->target;
2970 cgd->inq_data = dev->inq_data;
2971 cgd->ccb_h.status = CAM_REQ_CMP;
2972 cgd->serial_num_len = dev->serial_num_len;
2973 if ((dev->serial_num_len > 0)
2974 && (dev->serial_num != NULL))
2975 bcopy(dev->serial_num, cgd->serial_num,
2976 dev->serial_num_len);
2981 case XPT_GDEV_STATS:
2986 dev = start_ccb->ccb_h.path->device;
2988 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2989 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2991 struct ccb_getdevstats *cgds;
2995 cgds = &start_ccb->cgds;
2996 bus = cgds->ccb_h.path->bus;
2997 tar = cgds->ccb_h.path->target;
2998 cgds->dev_openings = dev->ccbq.dev_openings;
2999 cgds->dev_active = dev->ccbq.dev_active;
3000 cgds->devq_openings = dev->ccbq.devq_openings;
3001 cgds->devq_queued = dev->ccbq.queue.entries;
3002 cgds->held = dev->ccbq.held;
3003 cgds->last_reset = tar->last_reset;
3004 cgds->maxtags = dev->quirk->maxtags;
3005 cgds->mintags = dev->quirk->mintags;
3006 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3007 cgds->last_reset = bus->last_reset;
3008 cgds->ccb_h.status = CAM_REQ_CMP;
3015 struct cam_periph *nperiph;
3016 struct periph_list *periph_head;
3017 struct ccb_getdevlist *cgdl;
3020 struct cam_ed *device;
3027 * Don't want anyone mucking with our data.
3030 device = start_ccb->ccb_h.path->device;
3031 periph_head = &device->periphs;
3032 cgdl = &start_ccb->cgdl;
3035 * Check and see if the list has changed since the user
3036 * last requested a list member. If so, tell them that the
3037 * list has changed, and therefore they need to start over
3038 * from the beginning.
3040 if ((cgdl->index != 0) &&
3041 (cgdl->generation != device->generation)) {
3042 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3048 * Traverse the list of peripherals and attempt to find
3049 * the requested peripheral.
3051 for (nperiph = periph_head->slh_first, i = 0;
3052 (nperiph != NULL) && (i <= cgdl->index);
3053 nperiph = nperiph->periph_links.sle_next, i++) {
3054 if (i == cgdl->index) {
3055 strncpy(cgdl->periph_name,
3056 nperiph->periph_name,
3058 cgdl->unit_number = nperiph->unit_number;
3063 cgdl->status = CAM_GDEVLIST_ERROR;
3068 if (nperiph == NULL)
3069 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3071 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3074 cgdl->generation = device->generation;
3077 cgdl->ccb_h.status = CAM_REQ_CMP;
3083 dev_pos_type position_type;
3084 struct ccb_dev_match *cdm;
3087 cdm = &start_ccb->cdm;
3090 * Prevent EDT changes while we traverse it.
3094 * There are two ways of getting at information in the EDT.
3095 * The first way is via the primary EDT tree. It starts
3096 * with a list of busses, then a list of targets on a bus,
3097 * then devices/luns on a target, and then peripherals on a
3098 * device/lun. The "other" way is by the peripheral driver
3099 * lists. The peripheral driver lists are organized by
3100 * peripheral driver. (obviously) So it makes sense to
3101 * use the peripheral driver list if the user is looking
3102 * for something like "da1", or all "da" devices. If the
3103 * user is looking for something on a particular bus/target
3104 * or lun, it's generally better to go through the EDT tree.
3107 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3108 position_type = cdm->pos.position_type;
3112 position_type = CAM_DEV_POS_NONE;
3114 for (i = 0; i < cdm->num_patterns; i++) {
3115 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3116 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3117 position_type = CAM_DEV_POS_EDT;
3122 if (cdm->num_patterns == 0)
3123 position_type = CAM_DEV_POS_EDT;
3124 else if (position_type == CAM_DEV_POS_NONE)
3125 position_type = CAM_DEV_POS_PDRV;
3128 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3129 case CAM_DEV_POS_EDT:
3130 ret = xptedtmatch(cdm);
3132 case CAM_DEV_POS_PDRV:
3133 ret = xptperiphlistmatch(cdm);
3136 cdm->status = CAM_DEV_MATCH_ERROR;
3142 if (cdm->status == CAM_DEV_MATCH_ERROR)
3143 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3145 start_ccb->ccb_h.status = CAM_REQ_CMP;
3151 struct ccb_setasync *csa;
3152 struct async_node *cur_entry;
3153 struct async_list *async_head;
3157 csa = &start_ccb->csa;
3158 added = csa->event_enable;
3159 async_head = &csa->ccb_h.path->device->asyncs;
3162 * If there is already an entry for us, simply
3166 cur_entry = SLIST_FIRST(async_head);
3167 while (cur_entry != NULL) {
3168 if ((cur_entry->callback_arg == csa->callback_arg)
3169 && (cur_entry->callback == csa->callback))
3171 cur_entry = SLIST_NEXT(cur_entry, links);
3174 if (cur_entry != NULL) {
3176 * If the request has no flags set,
3179 added &= ~cur_entry->event_enable;
3180 if (csa->event_enable == 0) {
3181 SLIST_REMOVE(async_head, cur_entry,
3183 csa->ccb_h.path->device->refcount--;
3184 free(cur_entry, M_DEVBUF);
3186 cur_entry->event_enable = csa->event_enable;
3189 cur_entry = malloc(sizeof(*cur_entry),
3190 M_DEVBUF, M_INTWAIT);
3191 cur_entry->event_enable = csa->event_enable;
3192 cur_entry->callback_arg = csa->callback_arg;
3193 cur_entry->callback = csa->callback;
3194 SLIST_INSERT_HEAD(async_head, cur_entry, links);
3195 csa->ccb_h.path->device->refcount++;
3198 if ((added & AC_FOUND_DEVICE) != 0) {
3200 * Get this peripheral up to date with all
3201 * the currently existing devices.
3203 xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3205 if ((added & AC_PATH_REGISTERED) != 0) {
3207 * Get this peripheral up to date with all
3208 * the currently existing busses.
3210 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3213 start_ccb->ccb_h.status = CAM_REQ_CMP;
3218 struct ccb_relsim *crs;
3222 crs = &start_ccb->crs;
3223 dev = crs->ccb_h.path->device;
3226 crs->ccb_h.status = CAM_DEV_NOT_THERE;
3232 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3234 if ((dev->inq_data.flags & SID_CmdQue) != 0) {
3236 /* Don't ever go below one opening */
3237 if (crs->openings > 0) {
3238 xpt_dev_ccbq_resize(crs->ccb_h.path,
3242 xpt_print_path(crs->ccb_h.path);
3243 printf("tagged openings "
3251 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3253 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3256 * Just extend the old timeout and decrement
3257 * the freeze count so that a single timeout
3258 * is sufficient for releasing the queue.
3260 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3261 callout_stop(&dev->c_handle);
3264 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3267 callout_reset(&dev->c_handle,
3268 (crs->release_timeout * hz) / 1000,
3269 xpt_release_devq_timeout, dev);
3271 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3275 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3277 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3279 * Decrement the freeze count so that a single
3280 * completion is still sufficient to unfreeze
3283 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3286 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3287 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3291 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3293 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3294 || (dev->ccbq.dev_active == 0)) {
3296 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3299 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3300 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3305 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3307 xpt_release_devq(crs->ccb_h.path, /*count*/1,
3310 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3311 start_ccb->ccb_h.status = CAM_REQ_CMP;
3315 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3318 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3319 start_ccb->ccb_h.path, start_ccb->crcn.flags,
3327 #ifdef CAM_DEBUG_DELAY
3328 cam_debug_delay = CAM_DEBUG_DELAY;
3330 cam_dflags = start_ccb->cdbg.flags;
3331 if (cam_dpath != NULL) {
3332 xpt_free_path(cam_dpath);
3336 if (cam_dflags != CAM_DEBUG_NONE) {
3337 if (xpt_create_path(&cam_dpath, xpt_periph,
3338 start_ccb->ccb_h.path_id,
3339 start_ccb->ccb_h.target_id,
3340 start_ccb->ccb_h.target_lun) !=
3342 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3343 cam_dflags = CAM_DEBUG_NONE;
3345 start_ccb->ccb_h.status = CAM_REQ_CMP;
3346 xpt_print_path(cam_dpath);
3347 printf("debugging flags now %x\n", cam_dflags);
3351 start_ccb->ccb_h.status = CAM_REQ_CMP;
3354 #else /* !CAMDEBUG */
3355 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3356 #endif /* CAMDEBUG */
3360 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3361 xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3362 start_ccb->ccb_h.status = CAM_REQ_CMP;
3369 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3376 xpt_polled_action(union ccb *start_ccb)
3380 struct cam_sim *sim;
3381 struct cam_devq *devq;
3384 timeout = start_ccb->ccb_h.timeout;
3385 sim = start_ccb->ccb_h.path->bus->sim;
3387 dev = start_ccb->ccb_h.path->device;
3392 * Steal an opening so that no other queued requests
3393 * can get it before us while we simulate interrupts.
3395 dev->ccbq.devq_openings--;
3396 dev->ccbq.dev_openings--;
3398 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0)
3399 && (--timeout > 0)) {
3401 (*(sim->sim_poll))(sim);
3406 dev->ccbq.devq_openings++;
3407 dev->ccbq.dev_openings++;
3410 xpt_action(start_ccb);
3411 while(--timeout > 0) {
3412 (*(sim->sim_poll))(sim);
3415 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3422 * XXX Is it worth adding a sim_timeout entry
3423 * point so we can attempt recovery? If
3424 * this is only used for dumps, I don't think
3427 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3430 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3436 * Schedule a peripheral driver to receive a ccb when it's
3437 * target device has space for more transactions.
3440 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3442 struct cam_ed *device;
3446 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3447 device = perph->path->device;
3449 if (periph_is_queued(perph)) {
3450 /* Simply reorder based on new priority */
3451 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3452 (" change priority to %d\n", new_priority));
3453 if (new_priority < perph->pinfo.priority) {
3454 camq_change_priority(&device->drvq,
3460 /* New entry on the queue */
3461 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3462 (" added periph to queue\n"));
3463 perph->pinfo.priority = new_priority;
3464 perph->pinfo.generation = ++device->drvq.generation;
3465 camq_insert(&device->drvq, &perph->pinfo);
3466 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3470 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3471 (" calling xpt_run_devq\n"));
3472 xpt_run_dev_allocq(perph->path->bus);
3478 * Schedule a device to run on a given queue.
3479 * If the device was inserted as a new entry on the queue,
3480 * return 1 meaning the device queue should be run. If we
3481 * were already queued, implying someone else has already
3482 * started the queue, return 0 so the caller doesn't attempt
3483 * to run the queue. Must be run at either splsoftcam
3484 * (or splcam since that encompases splsoftcam).
3487 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3488 u_int32_t new_priority)
3491 u_int32_t old_priority;
3493 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3495 old_priority = pinfo->priority;
3498 * Are we already queued?
3500 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3501 /* Simply reorder based on new priority */
3502 if (new_priority < old_priority) {
3503 camq_change_priority(queue, pinfo->index,
3505 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3506 ("changed priority to %d\n",
3511 /* New entry on the queue */
3512 if (new_priority < old_priority)
3513 pinfo->priority = new_priority;
3515 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3516 ("Inserting onto queue\n"));
3517 pinfo->generation = ++queue->generation;
3518 camq_insert(queue, pinfo);
3525 xpt_run_dev_allocq(struct cam_eb *bus)
3527 struct cam_devq *devq;
3530 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3531 devq = bus->sim->devq;
3533 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3534 (" qfrozen_cnt == 0x%x, entries == %d, "
3535 "openings == %d, active == %d\n",
3536 devq->alloc_queue.qfrozen_cnt,
3537 devq->alloc_queue.entries,
3538 devq->alloc_openings,
3539 devq->alloc_active));
3542 devq->alloc_queue.qfrozen_cnt++;
3543 while ((devq->alloc_queue.entries > 0)
3544 && (devq->alloc_openings > 0)
3545 && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3546 struct cam_ed_qinfo *qinfo;
3547 struct cam_ed *device;
3548 union ccb *work_ccb;
3549 struct cam_periph *drv;
3552 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3554 device = qinfo->device;
3556 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3557 ("running device %p\n", device));
3559 drvq = &device->drvq;
3562 if (drvq->entries <= 0) {
3563 panic("xpt_run_dev_allocq: "
3564 "Device on queue without any work to do");
3567 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3568 devq->alloc_openings--;
3569 devq->alloc_active++;
3570 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3572 xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3573 drv->pinfo.priority);
3574 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3575 ("calling periph start\n"));
3576 drv->periph_start(drv, work_ccb);
3579 * Malloc failure in alloc_ccb
3582 * XXX add us to a list to be run from free_ccb
3583 * if we don't have any ccbs active on this
3584 * device queue otherwise we may never get run
3590 /* Raise IPL for possible insertion and test at top of loop */
3593 if (drvq->entries > 0) {
3594 /* We have more work. Attempt to reschedule */
3595 xpt_schedule_dev_allocq(bus, device);
3598 devq->alloc_queue.qfrozen_cnt--;
3603 xpt_run_dev_sendq(struct cam_eb *bus)
3605 struct cam_devq *devq;
3608 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3610 devq = bus->sim->devq;
3613 devq->send_queue.qfrozen_cnt++;
3616 while ((devq->send_queue.entries > 0)
3617 && (devq->send_openings > 0)) {
3618 struct cam_ed_qinfo *qinfo;
3619 struct cam_ed *device;
3620 union ccb *work_ccb;
3621 struct cam_sim *sim;
3625 if (devq->send_queue.qfrozen_cnt > 1) {
3630 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3632 device = qinfo->device;
3635 * If the device has been "frozen", don't attempt
3638 if (device->qfrozen_cnt > 0) {
3643 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3644 ("running device %p\n", device));
3646 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3647 if (work_ccb == NULL) {
3648 printf("device on run queue with no ccbs???\n");
3653 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3655 if (num_highpower <= 0) {
3657 * We got a high power command, but we
3658 * don't have any available slots. Freeze
3659 * the device queue until we have a slot
3662 device->qfrozen_cnt++;
3663 STAILQ_INSERT_TAIL(&highpowerq,
3671 * Consume a high power slot while
3677 devq->active_dev = device;
3678 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3680 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3683 devq->send_openings--;
3684 devq->send_active++;
3686 if (device->ccbq.queue.entries > 0)
3687 xpt_schedule_dev_sendq(bus, device);
3689 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3691 * The client wants to freeze the queue
3692 * after this CCB is sent.
3695 device->qfrozen_cnt++;
3701 /* In Target mode, the peripheral driver knows best... */
3702 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3703 if ((device->inq_flags & SID_CmdQue) != 0
3704 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3705 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3708 * Clear this in case of a retried CCB that
3709 * failed due to a rejected tag.
3711 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3715 * Device queues can be shared among multiple sim instances
3716 * that reside on different busses. Use the SIM in the queue
3717 * CCB's path, rather than the one in the bus that was passed
3718 * into this function.
3720 sim = work_ccb->ccb_h.path->bus->sim;
3721 (*(sim->sim_action))(sim, work_ccb);
3724 devq->active_dev = NULL;
3726 /* Raise IPL for possible insertion and test at top of loop */
3731 devq->send_queue.qfrozen_cnt--;
3736 * This function merges stuff from the slave ccb into the master ccb, while
3737 * keeping important fields in the master ccb constant.
3740 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3743 * Pull fields that are valid for peripheral drivers to set
3744 * into the master CCB along with the CCB "payload".
3746 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3747 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3748 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3749 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3750 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3751 sizeof(union ccb) - sizeof(struct ccb_hdr));
3755 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3757 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3758 callout_init(&ccb_h->timeout_ch);
3759 ccb_h->pinfo.priority = priority;
3761 ccb_h->path_id = path->bus->path_id;
3763 ccb_h->target_id = path->target->target_id;
3765 ccb_h->target_id = CAM_TARGET_WILDCARD;
3767 ccb_h->target_lun = path->device->lun_id;
3768 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3770 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3772 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3776 /* Path manipulation functions */
3778 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3779 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3781 struct cam_path *path;
3784 path = malloc(sizeof(*path), M_DEVBUF, M_INTWAIT);
3785 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3786 if (status != CAM_REQ_CMP) {
3787 free(path, M_DEVBUF);
3790 *new_path_ptr = path;
3795 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3796 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3799 struct cam_et *target;
3800 struct cam_ed *device;
3804 status = CAM_REQ_CMP; /* Completed without error */
3805 target = NULL; /* Wildcarded */
3806 device = NULL; /* Wildcarded */
3809 * We will potentially modify the EDT, so block interrupts
3810 * that may attempt to create cam paths.
3813 bus = xpt_find_bus(path_id);
3815 status = CAM_PATH_INVALID;
3817 target = xpt_find_target(bus, target_id);
3818 if (target == NULL) {
3820 struct cam_et *new_target;
3822 new_target = xpt_alloc_target(bus, target_id);
3823 if (new_target == NULL) {
3824 status = CAM_RESRC_UNAVAIL;
3826 target = new_target;
3829 if (target != NULL) {
3830 device = xpt_find_device(target, lun_id);
3831 if (device == NULL) {
3833 struct cam_ed *new_device;
3835 new_device = xpt_alloc_device(bus,
3838 if (new_device == NULL) {
3839 status = CAM_RESRC_UNAVAIL;
3841 device = new_device;
3849 * Only touch the user's data if we are successful.
3851 if (status == CAM_REQ_CMP) {
3852 new_path->periph = perph;
3853 new_path->bus = bus;
3854 new_path->target = target;
3855 new_path->device = device;
3856 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3859 xpt_release_device(bus, target, device);
3861 xpt_release_target(bus, target);
3863 xpt_release_bus(bus);
3869 xpt_release_path(struct cam_path *path)
3871 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3872 if (path->device != NULL) {
3873 xpt_release_device(path->bus, path->target, path->device);
3874 path->device = NULL;
3876 if (path->target != NULL) {
3877 xpt_release_target(path->bus, path->target);
3878 path->target = NULL;
3880 if (path->bus != NULL) {
3881 xpt_release_bus(path->bus);
3887 xpt_free_path(struct cam_path *path)
3889 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3890 xpt_release_path(path);
3891 free(path, M_DEVBUF);
3896 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3897 * in path1, 2 for match with wildcards in path2.
3900 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3904 if (path1->bus != path2->bus) {
3905 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3907 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3912 if (path1->target != path2->target) {
3913 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3916 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3921 if (path1->device != path2->device) {
3922 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3925 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3934 xpt_print_path(struct cam_path *path)
3937 printf("(nopath): ");
3939 if (path->periph != NULL)
3940 printf("(%s%d:", path->periph->periph_name,
3941 path->periph->unit_number);
3943 printf("(noperiph:");
3945 if (path->bus != NULL)
3946 printf("%s%d:%d:", path->bus->sim->sim_name,
3947 path->bus->sim->unit_number,
3948 path->bus->sim->bus_id);
3952 if (path->target != NULL)
3953 printf("%d:", path->target->target_id);
3957 if (path->device != NULL)
3958 printf("%d): ", path->device->lun_id);
3965 xpt_path_path_id(struct cam_path *path)
3967 return(path->bus->path_id);
3971 xpt_path_target_id(struct cam_path *path)
3973 if (path->target != NULL)
3974 return (path->target->target_id);
3976 return (CAM_TARGET_WILDCARD);
3980 xpt_path_lun_id(struct cam_path *path)
3982 if (path->device != NULL)
3983 return (path->device->lun_id);
3985 return (CAM_LUN_WILDCARD);
3989 xpt_path_sim(struct cam_path *path)
3991 return (path->bus->sim);
3995 xpt_path_periph(struct cam_path *path)
3997 return (path->periph);
4001 * Release a CAM control block for the caller. Remit the cost of the structure
4002 * to the device referenced by the path. If the this device had no 'credits'
4003 * and peripheral drivers have registered async callbacks for this notification
4007 xpt_release_ccb(union ccb *free_ccb)
4010 struct cam_path *path;
4011 struct cam_ed *device;
4014 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4015 path = free_ccb->ccb_h.path;
4016 device = path->device;
4019 cam_ccbq_release_opening(&device->ccbq);
4020 if (xpt_ccb_count > xpt_max_ccbs) {
4021 xpt_free_ccb(free_ccb);
4024 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle);
4026 bus->sim->devq->alloc_openings++;
4027 bus->sim->devq->alloc_active--;
4028 /* XXX Turn this into an inline function - xpt_run_device?? */
4029 if ((device_is_alloc_queued(device) == 0)
4030 && (device->drvq.entries > 0)) {
4031 xpt_schedule_dev_allocq(bus, device);
4034 if (dev_allocq_is_runnable(bus->sim->devq))
4035 xpt_run_dev_allocq(bus);
4038 /* Functions accessed by SIM drivers */
4041 * A sim structure, listing the SIM entry points and instance
4042 * identification info is passed to xpt_bus_register to hook the SIM
4043 * into the CAM framework. xpt_bus_register creates a cam_eb entry
4044 * for this new bus and places it in the array of busses and assigns
4045 * it a path_id. The path_id may be influenced by "hard wiring"
4046 * information specified by the user. Once interrupt services are
4047 * availible, the bus will be probed.
4050 xpt_bus_register(struct cam_sim *sim, u_int32_t bus)
4052 struct cam_eb *new_bus;
4053 struct cam_eb *old_bus;
4054 struct ccb_pathinq cpi;
4058 new_bus = malloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT);
4060 if (strcmp(sim->sim_name, "xpt") != 0) {
4062 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4065 TAILQ_INIT(&new_bus->et_entries);
4066 new_bus->path_id = sim->path_id;
4069 timevalclear(&new_bus->last_reset);
4071 new_bus->refcount = 1; /* Held until a bus_deregister event */
4072 new_bus->generation = 0;
4074 old_bus = TAILQ_FIRST(&xpt_busses);
4075 while (old_bus != NULL
4076 && old_bus->path_id < new_bus->path_id)
4077 old_bus = TAILQ_NEXT(old_bus, links);
4078 if (old_bus != NULL)
4079 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4081 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links);
4085 /* Notify interested parties */
4086 if (sim->path_id != CAM_XPT_PATH_ID) {
4087 struct cam_path path;
4089 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4090 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4091 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4092 cpi.ccb_h.func_code = XPT_PATH_INQ;
4093 xpt_action((union ccb *)&cpi);
4094 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi);
4095 xpt_release_path(&path);
4097 return (CAM_SUCCESS);
4101 * Deregister a bus. We must clean out all transactions pending on the bus.
4102 * This routine is typically called prior to cam_sim_free() (e.g. see
4103 * dev/usbmisc/umass/umass.c)
4106 xpt_bus_deregister(path_id_t pathid)
4108 struct cam_path bus_path;
4111 status = xpt_compile_path(&bus_path, NULL, pathid,
4112 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4113 if (status != CAM_REQ_CMP)
4117 * This should clear out all pending requests and timeouts, but
4118 * the ccb's may be queued to a software interrupt.
4120 * XXX AC_LOST_DEVICE does not precisely abort the pending requests,
4121 * and it really ought to.
4123 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4124 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4126 /* make sure all responses have been processed */
4130 /* Release the reference count held while registered. */
4131 xpt_release_bus(bus_path.bus);
4132 xpt_release_path(&bus_path);
4134 return (CAM_REQ_CMP);
4138 xptnextfreepathid(void)
4145 bus = TAILQ_FIRST(&xpt_busses);
4147 /* Find an unoccupied pathid */
4149 && bus->path_id <= pathid) {
4150 if (bus->path_id == pathid)
4152 bus = TAILQ_NEXT(bus, links);
4156 * Ensure that this pathid is not reserved for
4157 * a bus that may be registered in the future.
4159 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4161 /* Start the search over */
4168 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4172 char buf[32], *strval;
4174 pathid = CAM_XPT_PATH_ID;
4175 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4177 while ((i = resource_locate(i, "scbus")) != -1) {
4178 dunit = resource_query_unit(i);
4179 if (dunit < 0) /* unwired?! */
4181 if (resource_string_value("scbus", dunit, "at", &strval) != 0)
4183 if (strcmp(buf, strval) != 0)
4185 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4186 if (sim_bus == val) {
4190 } else if (sim_bus == 0) {
4191 /* Unspecified matches bus 0 */
4195 printf("Ambiguous scbus configuration for %s%d "
4196 "bus %d, cannot wire down. The kernel "
4197 "config entry for scbus%d should "
4198 "specify a controller bus.\n"
4199 "Scbus will be assigned dynamically.\n",
4200 sim_name, sim_unit, sim_bus, dunit);
4205 if (pathid == CAM_XPT_PATH_ID)
4206 pathid = xptnextfreepathid();
4211 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4214 struct cam_et *target, *next_target;
4215 struct cam_ed *device, *next_device;
4218 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4221 * Most async events come from a CAM interrupt context. In
4222 * a few cases, the error recovery code at the peripheral layer,
4223 * which may run from our SWI or a process context, may signal
4224 * deferred events with a call to xpt_async. Ensure async
4225 * notifications are serialized by blocking cam interrupts.
4231 if (async_code == AC_BUS_RESET) {
4232 /* Update our notion of when the last reset occurred */
4233 microuptime(&bus->last_reset);
4236 for (target = TAILQ_FIRST(&bus->et_entries);
4238 target = next_target) {
4240 next_target = TAILQ_NEXT(target, links);
4242 if (path->target != target
4243 && path->target->target_id != CAM_TARGET_WILDCARD
4244 && target->target_id != CAM_TARGET_WILDCARD)
4247 if (async_code == AC_SENT_BDR) {
4248 /* Update our notion of when the last reset occurred */
4249 microuptime(&path->target->last_reset);
4252 for (device = TAILQ_FIRST(&target->ed_entries);
4254 device = next_device) {
4256 next_device = TAILQ_NEXT(device, links);
4258 if (path->device != device
4259 && path->device->lun_id != CAM_LUN_WILDCARD
4260 && device->lun_id != CAM_LUN_WILDCARD)
4263 xpt_dev_async(async_code, bus, target,
4266 xpt_async_bcast(&device->asyncs, async_code,
4272 * If this wasn't a fully wildcarded async, tell all
4273 * clients that want all async events.
4275 if (bus != xpt_periph->path->bus)
4276 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4282 xpt_async_bcast(struct async_list *async_head,
4283 u_int32_t async_code,
4284 struct cam_path *path, void *async_arg)
4286 struct async_node *cur_entry;
4288 cur_entry = SLIST_FIRST(async_head);
4289 while (cur_entry != NULL) {
4290 struct async_node *next_entry;
4292 * Grab the next list entry before we call the current
4293 * entry's callback. This is because the callback function
4294 * can delete its async callback entry.
4296 next_entry = SLIST_NEXT(cur_entry, links);
4297 if ((cur_entry->event_enable & async_code) != 0)
4298 cur_entry->callback(cur_entry->callback_arg,
4301 cur_entry = next_entry;
4306 * Handle any per-device event notifications that require action by the XPT.
4309 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4310 struct cam_ed *device, void *async_arg)
4313 struct cam_path newpath;
4316 * We only need to handle events for real devices.
4318 if (target->target_id == CAM_TARGET_WILDCARD
4319 || device->lun_id == CAM_LUN_WILDCARD)
4323 * We need our own path with wildcards expanded to
4324 * handle certain types of events.
4326 if ((async_code == AC_SENT_BDR)
4327 || (async_code == AC_BUS_RESET)
4328 || (async_code == AC_INQ_CHANGED))
4329 status = xpt_compile_path(&newpath, NULL,
4334 status = CAM_REQ_CMP_ERR;
4336 if (status == CAM_REQ_CMP) {
4339 * Allow transfer negotiation to occur in a
4340 * tag free environment.
4342 if (async_code == AC_SENT_BDR
4343 || async_code == AC_BUS_RESET)
4344 xpt_toggle_tags(&newpath);
4346 if (async_code == AC_INQ_CHANGED) {
4348 * We've sent a start unit command, or
4349 * something similar to a device that
4350 * may have caused its inquiry data to
4351 * change. So we re-scan the device to
4352 * refresh the inquiry data for it.
4354 xpt_scan_lun(newpath.periph, &newpath,
4355 CAM_EXPECT_INQ_CHANGE, NULL);
4357 xpt_release_path(&newpath);
4358 } else if (async_code == AC_LOST_DEVICE) {
4360 * When we lose a device the device may be about to detach
4361 * the sim, we have to clear out all pending timeouts and
4362 * requests before that happens. XXX it would be nice if
4363 * we could abort the requests pertaining to the device.
4365 xpt_release_devq_timeout(device);
4366 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) {
4367 device->flags |= CAM_DEV_UNCONFIGURED;
4368 xpt_release_device(bus, target, device);
4370 } else if (async_code == AC_TRANSFER_NEG) {
4371 struct ccb_trans_settings *settings;
4373 settings = (struct ccb_trans_settings *)async_arg;
4374 xpt_set_transfer_settings(settings, device,
4375 /*async_update*/TRUE);
4380 xpt_freeze_devq(struct cam_path *path, u_int count)
4383 struct ccb_hdr *ccbh;
4386 path->device->qfrozen_cnt += count;
4389 * Mark the last CCB in the queue as needing
4390 * to be requeued if the driver hasn't
4391 * changed it's state yet. This fixes a race
4392 * where a ccb is just about to be queued to
4393 * a controller driver when it's interrupt routine
4394 * freezes the queue. To completly close the
4395 * hole, controller drives must check to see
4396 * if a ccb's status is still CAM_REQ_INPROG
4397 * under spl protection just before they queue
4398 * the CCB. See ahc_action/ahc_freeze_devq for
4401 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4402 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4403 ccbh->status = CAM_REQUEUE_REQ;
4405 return (path->device->qfrozen_cnt);
4409 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4411 sim->devq->send_queue.qfrozen_cnt += count;
4412 if (sim->devq->active_dev != NULL) {
4413 struct ccb_hdr *ccbh;
4415 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4417 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4418 ccbh->status = CAM_REQUEUE_REQ;
4420 return (sim->devq->send_queue.qfrozen_cnt);
4424 * WARNING: most devices, especially USB/UMASS, may detach their sim early.
4425 * We ref-count the sim (and the bus only NULLs it out when the bus has been
4426 * freed, which is not the case here), but the device queue is also freed XXX
4427 * and we have to check that here.
4429 * XXX fixme: could we simply not null-out the device queue via
4433 xpt_release_devq_timeout(void *arg)
4435 struct cam_ed *device;
4437 device = (struct cam_ed *)arg;
4439 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4443 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4445 xpt_release_devq_device(path->device, count, run_queue);
4449 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4458 if (dev->qfrozen_cnt > 0) {
4460 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4461 dev->qfrozen_cnt -= count;
4462 if (dev->qfrozen_cnt == 0) {
4465 * No longer need to wait for a successful
4466 * command completion.
4468 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4471 * Remove any timeouts that might be scheduled
4472 * to release this queue.
4474 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4475 callout_stop(&dev->c_handle);
4476 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4480 * Now that we are unfrozen schedule the
4481 * device so any pending transactions are
4484 if ((dev->ccbq.queue.entries > 0)
4485 && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4486 && (run_queue != 0)) {
4493 xpt_run_dev_sendq(dev->target->bus);
4498 xpt_release_simq(struct cam_sim *sim, int run_queue)
4503 sendq = &(sim->devq->send_queue);
4505 if (sendq->qfrozen_cnt > 0) {
4507 sendq->qfrozen_cnt--;
4508 if (sendq->qfrozen_cnt == 0) {
4512 * If there is a timeout scheduled to release this
4513 * sim queue, remove it. The queue frozen count is
4516 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4517 callout_stop(&sim->c_handle);
4518 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4520 bus = xpt_find_bus(sim->path_id);
4525 * Now that we are unfrozen run the send queue.
4527 xpt_run_dev_sendq(bus);
4529 xpt_release_bus(bus);
4537 xpt_done(union ccb *done_ccb)
4543 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4544 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4546 * Queue up the request for handling by our SWI handler
4547 * any of the "non-immediate" type of ccbs.
4549 switch (done_ccb->ccb_h.path->periph->type) {
4550 case CAM_PERIPH_BIO:
4551 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h,
4553 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4556 case CAM_PERIPH_NET:
4557 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h,
4559 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4572 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT);
4577 xpt_free_ccb(union ccb *free_ccb)
4579 free(free_ccb, M_DEVBUF);
4584 /* Private XPT functions */
4587 * Get a CAM control block for the caller. Charge the structure to the device
4588 * referenced by the path. If the this device has no 'credits' then the
4589 * device already has the maximum number of outstanding operations under way
4590 * and we return NULL. If we don't have sufficient resources to allocate more
4591 * ccbs, we also return NULL.
4594 xpt_get_ccb(struct cam_ed *device)
4600 if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) {
4601 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT);
4602 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h,
4606 cam_ccbq_take_opening(&device->ccbq);
4607 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle);
4613 xpt_release_bus(struct cam_eb *bus)
4617 if (bus->refcount == 1) {
4618 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL);
4619 TAILQ_REMOVE(&xpt_busses, bus, links);
4621 cam_sim_release(bus->sim, 0);
4625 KKASSERT(bus->refcount == 1);
4626 free(bus, M_DEVBUF);
4633 static struct cam_et *
4634 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4636 struct cam_et *target;
4637 struct cam_et *cur_target;
4639 target = malloc(sizeof(*target), M_DEVBUF, M_INTWAIT);
4641 TAILQ_INIT(&target->ed_entries);
4643 target->target_id = target_id;
4644 target->refcount = 1;
4645 target->generation = 0;
4646 timevalclear(&target->last_reset);
4648 * Hold a reference to our parent bus so it
4649 * will not go away before we do.
4653 /* Insertion sort into our bus's target list */
4654 cur_target = TAILQ_FIRST(&bus->et_entries);
4655 while (cur_target != NULL && cur_target->target_id < target_id)
4656 cur_target = TAILQ_NEXT(cur_target, links);
4658 if (cur_target != NULL) {
4659 TAILQ_INSERT_BEFORE(cur_target, target, links);
4661 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4668 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
4671 if (target->refcount == 1) {
4672 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL);
4673 TAILQ_REMOVE(&bus->et_entries, target, links);
4675 xpt_release_bus(bus);
4676 KKASSERT(target->refcount == 1);
4677 free(target, M_DEVBUF);
4684 static struct cam_ed *
4685 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4687 struct cam_ed *device;
4688 struct cam_devq *devq;
4691 /* Make space for us in the device queue on our bus */
4692 devq = bus->sim->devq;
4693 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
4695 if (status != CAM_REQ_CMP) {
4698 device = malloc(sizeof(*device), M_DEVBUF, M_INTWAIT);
4701 if (device != NULL) {
4702 struct cam_ed *cur_device;
4704 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
4705 device->alloc_ccb_entry.device = device;
4706 cam_init_pinfo(&device->send_ccb_entry.pinfo);
4707 device->send_ccb_entry.device = device;
4708 device->target = target;
4709 device->lun_id = lun_id;
4710 /* Initialize our queues */
4711 if (camq_init(&device->drvq, 0) != 0) {
4712 free(device, M_DEVBUF);
4715 if (cam_ccbq_init(&device->ccbq,
4716 bus->sim->max_dev_openings) != 0) {
4717 camq_fini(&device->drvq);
4718 free(device, M_DEVBUF);
4721 SLIST_INIT(&device->asyncs);
4722 SLIST_INIT(&device->periphs);
4723 device->generation = 0;
4724 device->owner = NULL;
4726 * Take the default quirk entry until we have inquiry
4727 * data and can determine a better quirk to use.
4729 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
4730 bzero(&device->inq_data, sizeof(device->inq_data));
4731 device->inq_flags = 0;
4732 device->queue_flags = 0;
4733 device->serial_num = NULL;
4734 device->serial_num_len = 0;
4735 device->qfrozen_cnt = 0;
4736 device->flags = CAM_DEV_UNCONFIGURED;
4737 device->tag_delay_count = 0;
4738 device->refcount = 1;
4739 callout_init(&device->c_handle);
4742 * Hold a reference to our parent target so it
4743 * will not go away before we do.
4748 * XXX should be limited by number of CCBs this bus can
4751 xpt_max_ccbs += device->ccbq.devq_openings;
4752 /* Insertion sort into our target's device list */
4753 cur_device = TAILQ_FIRST(&target->ed_entries);
4754 while (cur_device != NULL && cur_device->lun_id < lun_id)
4755 cur_device = TAILQ_NEXT(cur_device, links);
4756 if (cur_device != NULL) {
4757 TAILQ_INSERT_BEFORE(cur_device, device, links);
4759 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4761 target->generation++;
4767 xpt_reference_device(struct cam_ed *device)
4773 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
4774 struct cam_ed *device)
4776 struct cam_devq *devq;
4779 if (device->refcount == 1) {
4780 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED);
4782 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
4783 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
4784 panic("Removing device while still queued for ccbs");
4786 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4787 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4788 callout_stop(&device->c_handle);
4791 TAILQ_REMOVE(&target->ed_entries, device,links);
4792 target->generation++;
4793 xpt_max_ccbs -= device->ccbq.devq_openings;
4794 /* Release our slot in the devq */
4795 devq = bus->sim->devq;
4796 cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
4797 xpt_release_target(bus, target);
4798 KKASSERT(device->refcount == 1);
4799 free(device, M_DEVBUF);
4807 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4817 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
4818 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4819 if (result == CAM_REQ_CMP && (diff < 0)) {
4820 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
4822 /* Adjust the global limit */
4823 xpt_max_ccbs += diff;
4828 static struct cam_eb *
4829 xpt_find_bus(path_id_t path_id)
4833 for (bus = TAILQ_FIRST(&xpt_busses);
4835 bus = TAILQ_NEXT(bus, links)) {
4836 if (bus->path_id == path_id) {
4844 static struct cam_et *
4845 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4847 struct cam_et *target;
4849 for (target = TAILQ_FIRST(&bus->et_entries);
4851 target = TAILQ_NEXT(target, links)) {
4852 if (target->target_id == target_id) {
4860 static struct cam_ed *
4861 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4863 struct cam_ed *device;
4865 for (device = TAILQ_FIRST(&target->ed_entries);
4867 device = TAILQ_NEXT(device, links)) {
4868 if (device->lun_id == lun_id) {
4877 union ccb *request_ccb;
4878 struct ccb_pathinq *cpi;
4880 } xpt_scan_bus_info;
4883 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
4884 * As the scan progresses, xpt_scan_bus is used as the
4885 * callback on completion function.
4888 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
4890 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4891 ("xpt_scan_bus\n"));
4892 switch (request_ccb->ccb_h.func_code) {
4895 xpt_scan_bus_info *scan_info;
4896 union ccb *work_ccb;
4897 struct cam_path *path;
4902 /* Find out the characteristics of the bus */
4903 work_ccb = xpt_alloc_ccb();
4904 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
4905 request_ccb->ccb_h.pinfo.priority);
4906 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
4907 xpt_action(work_ccb);
4908 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
4909 request_ccb->ccb_h.status = work_ccb->ccb_h.status;
4910 xpt_free_ccb(work_ccb);
4911 xpt_done(request_ccb);
4915 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
4917 * Can't scan the bus on an adapter that
4918 * cannot perform the initiator role.
4920 request_ccb->ccb_h.status = CAM_REQ_CMP;
4921 xpt_free_ccb(work_ccb);
4922 xpt_done(request_ccb);
4926 /* Save some state for use while we probe for devices */
4927 scan_info = (xpt_scan_bus_info *)
4928 malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT);
4929 scan_info->request_ccb = request_ccb;
4930 scan_info->cpi = &work_ccb->cpi;
4932 /* Cache on our stack so we can work asynchronously */
4933 max_target = scan_info->cpi->max_target;
4934 initiator_id = scan_info->cpi->initiator_id;
4937 * Don't count the initiator if the
4938 * initiator is addressable.
4940 scan_info->pending_count = max_target + 1;
4941 if (initiator_id <= max_target)
4942 scan_info->pending_count--;
4944 for (i = 0; i <= max_target; i++) {
4946 if (i == initiator_id)
4949 status = xpt_create_path(&path, xpt_periph,
4950 request_ccb->ccb_h.path_id,
4952 if (status != CAM_REQ_CMP) {
4953 printf("xpt_scan_bus: xpt_create_path failed"
4954 " with status %#x, bus scan halted\n",
4958 work_ccb = xpt_alloc_ccb();
4959 xpt_setup_ccb(&work_ccb->ccb_h, path,
4960 request_ccb->ccb_h.pinfo.priority);
4961 work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
4962 work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
4963 work_ccb->ccb_h.ppriv_ptr0 = scan_info;
4964 work_ccb->crcn.flags = request_ccb->crcn.flags;
4966 printf("xpt_scan_bus: probing %d:%d:%d\n",
4967 request_ccb->ccb_h.path_id, i, 0);
4969 xpt_action(work_ccb);
4975 xpt_scan_bus_info *scan_info;
4977 target_id_t target_id;
4980 /* Reuse the same CCB to query if a device was really found */
4981 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
4982 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
4983 request_ccb->ccb_h.pinfo.priority);
4984 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
4986 path_id = request_ccb->ccb_h.path_id;
4987 target_id = request_ccb->ccb_h.target_id;
4988 lun_id = request_ccb->ccb_h.target_lun;
4989 xpt_action(request_ccb);
4992 printf("xpt_scan_bus: got back probe from %d:%d:%d\n",
4993 path_id, target_id, lun_id);
4996 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
4997 struct cam_ed *device;
4998 struct cam_et *target;
5002 * If we already probed lun 0 successfully, or
5003 * we have additional configured luns on this
5004 * target that might have "gone away", go onto
5007 target = request_ccb->ccb_h.path->target;
5009 * We may touch devices that we don't
5010 * hold references too, so ensure they
5011 * don't disappear out from under us.
5012 * The target above is referenced by the
5013 * path in the request ccb.
5017 device = TAILQ_FIRST(&target->ed_entries);
5018 if (device != NULL) {
5019 phl = device->quirk->quirks & CAM_QUIRK_HILUNS;
5020 if (device->lun_id == 0)
5021 device = TAILQ_NEXT(device, links);
5024 if ((lun_id != 0) || (device != NULL)) {
5025 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
5029 struct cam_ed *device;
5031 device = request_ccb->ccb_h.path->device;
5033 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
5034 /* Try the next lun */
5035 if (lun_id < (CAM_SCSI2_MAXLUN-1) ||
5036 (device->quirk->quirks & CAM_QUIRK_HILUNS))
5041 xpt_free_path(request_ccb->ccb_h.path);
5044 if ((lun_id == request_ccb->ccb_h.target_lun)
5045 || lun_id > scan_info->cpi->max_lun) {
5048 xpt_free_ccb(request_ccb);
5049 scan_info->pending_count--;
5050 if (scan_info->pending_count == 0) {
5051 xpt_free_ccb((union ccb *)scan_info->cpi);
5052 request_ccb = scan_info->request_ccb;
5053 free(scan_info, M_TEMP);
5054 request_ccb->ccb_h.status = CAM_REQ_CMP;
5055 xpt_done(request_ccb);
5058 /* Try the next device */
5059 struct cam_path *path;
5062 path = request_ccb->ccb_h.path;
5063 status = xpt_create_path(&path, xpt_periph,
5064 path_id, target_id, lun_id);
5065 if (status != CAM_REQ_CMP) {
5066 printf("xpt_scan_bus: xpt_create_path failed "
5067 "with status %#x, halting LUN scan\n",
5069 xpt_free_ccb(request_ccb);
5070 scan_info->pending_count--;
5071 if (scan_info->pending_count == 0) {
5073 (union ccb *)scan_info->cpi);
5074 request_ccb = scan_info->request_ccb;
5075 free(scan_info, M_TEMP);
5076 request_ccb->ccb_h.status = CAM_REQ_CMP;
5077 xpt_done(request_ccb);
5081 xpt_setup_ccb(&request_ccb->ccb_h, path,
5082 request_ccb->ccb_h.pinfo.priority);
5083 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5084 request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5085 request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5086 request_ccb->crcn.flags =
5087 scan_info->request_ccb->crcn.flags;
5089 xpt_print_path(path);
5090 printf("xpt_scan bus probing\n");
5092 xpt_action(request_ccb);
5107 PROBE_TUR_FOR_NEGOTIATION
5111 PROBE_INQUIRY_CKSUM = 0x01,
5112 PROBE_SERIAL_CKSUM = 0x02,
5113 PROBE_NO_ANNOUNCE = 0x04
5117 TAILQ_HEAD(, ccb_hdr) request_ccbs;
5118 probe_action action;
5119 union ccb saved_ccb;
5122 u_int8_t digest[16];
5126 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5127 cam_flags flags, union ccb *request_ccb)
5129 struct ccb_pathinq cpi;
5131 struct cam_path *new_path;
5132 struct cam_periph *old_periph;
5135 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5136 ("xpt_scan_lun\n"));
5138 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5139 cpi.ccb_h.func_code = XPT_PATH_INQ;
5140 xpt_action((union ccb *)&cpi);
5142 if (cpi.ccb_h.status != CAM_REQ_CMP) {
5143 if (request_ccb != NULL) {
5144 request_ccb->ccb_h.status = cpi.ccb_h.status;
5145 xpt_done(request_ccb);
5150 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5152 * Can't scan the bus on an adapter that
5153 * cannot perform the initiator role.
5155 if (request_ccb != NULL) {
5156 request_ccb->ccb_h.status = CAM_REQ_CMP;
5157 xpt_done(request_ccb);
5162 if (request_ccb == NULL) {
5163 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_INTWAIT);
5164 new_path = malloc(sizeof(*new_path), M_TEMP, M_INTWAIT);
5165 status = xpt_compile_path(new_path, xpt_periph,
5167 path->target->target_id,
5168 path->device->lun_id);
5170 if (status != CAM_REQ_CMP) {
5171 xpt_print_path(path);
5172 printf("xpt_scan_lun: can't compile path, can't "
5174 free(request_ccb, M_TEMP);
5175 free(new_path, M_TEMP);
5178 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5179 request_ccb->ccb_h.cbfcnp = xptscandone;
5180 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5181 request_ccb->crcn.flags = flags;
5185 if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5188 softc = (probe_softc *)old_periph->softc;
5189 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5192 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5193 probestart, "probe",
5195 request_ccb->ccb_h.path, NULL, 0,
5198 if (status != CAM_REQ_CMP) {
5199 xpt_print_path(path);
5200 printf("xpt_scan_lun: cam_alloc_periph returned an "
5201 "error, can't continue probe\n");
5202 request_ccb->ccb_h.status = status;
5203 xpt_done(request_ccb);
5210 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5212 xpt_release_path(done_ccb->ccb_h.path);
5213 free(done_ccb->ccb_h.path, M_TEMP);
5214 free(done_ccb, M_TEMP);
5218 proberegister(struct cam_periph *periph, void *arg)
5220 union ccb *request_ccb; /* CCB representing the probe request */
5223 request_ccb = (union ccb *)arg;
5224 if (periph == NULL) {
5225 printf("proberegister: periph was NULL!!\n");
5226 return(CAM_REQ_CMP_ERR);
5229 if (request_ccb == NULL) {
5230 printf("proberegister: no probe CCB, "
5231 "can't register device\n");
5232 return(CAM_REQ_CMP_ERR);
5235 softc = malloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO);
5236 TAILQ_INIT(&softc->request_ccbs);
5237 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5240 periph->softc = softc;
5241 cam_periph_acquire(periph);
5243 * Ensure we've waited at least a bus settle
5244 * delay before attempting to probe the device.
5245 * For HBAs that don't do bus resets, this won't make a difference.
5247 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5249 probeschedule(periph);
5250 return(CAM_REQ_CMP);
5254 probeschedule(struct cam_periph *periph)
5256 struct ccb_pathinq cpi;
5260 softc = (probe_softc *)periph->softc;
5261 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5263 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5264 cpi.ccb_h.func_code = XPT_PATH_INQ;
5265 xpt_action((union ccb *)&cpi);
5268 * If a device has gone away and another device, or the same one,
5269 * is back in the same place, it should have a unit attention
5270 * condition pending. It will not report the unit attention in
5271 * response to an inquiry, which may leave invalid transfer
5272 * negotiations in effect. The TUR will reveal the unit attention
5273 * condition. Only send the TUR for lun 0, since some devices
5274 * will get confused by commands other than inquiry to non-existent
5275 * luns. If you think a device has gone away start your scan from
5276 * lun 0. This will insure that any bogus transfer settings are
5279 * If we haven't seen the device before and the controller supports
5280 * some kind of transfer negotiation, negotiate with the first
5281 * sent command if no bus reset was performed at startup. This
5282 * ensures that the device is not confused by transfer negotiation
5283 * settings left over by loader or BIOS action.
5285 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5286 && (ccb->ccb_h.target_lun == 0)) {
5287 softc->action = PROBE_TUR;
5288 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5289 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5290 proberequestdefaultnegotiation(periph);
5291 softc->action = PROBE_INQUIRY;
5293 softc->action = PROBE_INQUIRY;
5296 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5297 softc->flags |= PROBE_NO_ANNOUNCE;
5299 softc->flags &= ~PROBE_NO_ANNOUNCE;
5301 xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5305 probestart(struct cam_periph *periph, union ccb *start_ccb)
5307 /* Probe the device that our peripheral driver points to */
5308 struct ccb_scsiio *csio;
5311 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5313 softc = (probe_softc *)periph->softc;
5314 csio = &start_ccb->csio;
5316 switch (softc->action) {
5318 case PROBE_TUR_FOR_NEGOTIATION:
5320 scsi_test_unit_ready(csio,
5329 case PROBE_FULL_INQUIRY:
5332 struct scsi_inquiry_data *inq_buf;
5334 inq_buf = &periph->path->device->inq_data;
5336 * If the device is currently configured, we calculate an
5337 * MD5 checksum of the inquiry data, and if the serial number
5338 * length is greater than 0, add the serial number data
5339 * into the checksum as well. Once the inquiry and the
5340 * serial number check finish, we attempt to figure out
5341 * whether we still have the same device.
5343 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5345 MD5Init(&softc->context);
5346 MD5Update(&softc->context, (unsigned char *)inq_buf,
5347 sizeof(struct scsi_inquiry_data));
5348 softc->flags |= PROBE_INQUIRY_CKSUM;
5349 if (periph->path->device->serial_num_len > 0) {
5350 MD5Update(&softc->context,
5351 periph->path->device->serial_num,
5352 periph->path->device->serial_num_len);
5353 softc->flags |= PROBE_SERIAL_CKSUM;
5355 MD5Final(softc->digest, &softc->context);
5358 if (softc->action == PROBE_INQUIRY)
5359 inquiry_len = SHORT_INQUIRY_LENGTH;
5361 inquiry_len = inq_buf->additional_length + 5;
5367 (u_int8_t *)inq_buf,
5372 /*timeout*/60 * 1000);
5375 case PROBE_MODE_SENSE:
5380 mode_buf_len = sizeof(struct scsi_mode_header_6)
5381 + sizeof(struct scsi_mode_blk_desc)
5382 + sizeof(struct scsi_control_page);
5383 mode_buf = malloc(mode_buf_len, M_TEMP, M_INTWAIT);
5384 scsi_mode_sense(csio,
5389 SMS_PAGE_CTRL_CURRENT,
5390 SMS_CONTROL_MODE_PAGE,
5397 case PROBE_SERIAL_NUM:
5399 struct scsi_vpd_unit_serial_number *serial_buf;
5400 struct cam_ed* device;
5403 device = periph->path->device;
5404 device->serial_num = NULL;
5405 device->serial_num_len = 0;
5407 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) {
5408 serial_buf = malloc(sizeof(*serial_buf), M_TEMP,
5409 M_INTWAIT | M_ZERO);
5414 (u_int8_t *)serial_buf,
5415 sizeof(*serial_buf),
5417 SVPD_UNIT_SERIAL_NUMBER,
5419 /*timeout*/60 * 1000);
5423 * We'll have to do without, let our probedone
5424 * routine finish up for us.
5426 start_ccb->csio.data_ptr = NULL;
5427 probedone(periph, start_ccb);
5431 xpt_action(start_ccb);
5435 proberequestdefaultnegotiation(struct cam_periph *periph)
5437 struct ccb_trans_settings cts;
5439 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5440 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5441 cts.flags = CCB_TRANS_USER_SETTINGS;
5442 xpt_action((union ccb *)&cts);
5443 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5444 cts.flags &= ~CCB_TRANS_USER_SETTINGS;
5445 cts.flags |= CCB_TRANS_CURRENT_SETTINGS;
5446 xpt_action((union ccb *)&cts);
5450 probedone(struct cam_periph *periph, union ccb *done_ccb)
5453 struct cam_path *path;
5456 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
5458 softc = (probe_softc *)periph->softc;
5459 path = done_ccb->ccb_h.path;
5460 priority = done_ccb->ccb_h.pinfo.priority;
5462 switch (softc->action) {
5465 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5467 if (cam_periph_error(done_ccb, 0,
5468 SF_NO_PRINT, NULL) == ERESTART)
5470 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
5471 /* Don't wedge the queue */
5472 xpt_release_devq(done_ccb->ccb_h.path,
5476 softc->action = PROBE_INQUIRY;
5477 xpt_release_ccb(done_ccb);
5478 xpt_schedule(periph, priority);
5482 case PROBE_FULL_INQUIRY:
5484 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5485 struct scsi_inquiry_data *inq_buf;
5486 u_int8_t periph_qual;
5488 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
5489 inq_buf = &path->device->inq_data;
5491 periph_qual = SID_QUAL(inq_buf);
5493 switch(periph_qual) {
5494 case SID_QUAL_LU_CONNECTED:
5499 * We conservatively request only
5500 * SHORT_INQUIRY_LEN bytes of inquiry
5501 * information during our first try
5502 * at sending an INQUIRY. If the device
5503 * has more information to give,
5504 * perform a second request specifying
5505 * the amount of information the device
5506 * is willing to give.
5508 alen = inq_buf->additional_length;
5509 if (softc->action == PROBE_INQUIRY
5510 && alen > (SHORT_INQUIRY_LENGTH - 5)) {
5511 softc->action = PROBE_FULL_INQUIRY;
5512 xpt_release_ccb(done_ccb);
5513 xpt_schedule(periph, priority);
5517 xpt_find_quirk(path->device);
5519 if ((inq_buf->flags & SID_CmdQue) != 0)
5520 softc->action = PROBE_MODE_SENSE;
5522 softc->action = PROBE_SERIAL_NUM;
5524 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5525 xpt_reference_device(path->device);
5527 xpt_release_ccb(done_ccb);
5528 xpt_schedule(periph, priority);
5534 } else if (cam_periph_error(done_ccb, 0,
5535 done_ccb->ccb_h.target_lun > 0
5536 ? SF_RETRY_UA|SF_QUIET_IR
5538 &softc->saved_ccb) == ERESTART) {
5540 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5541 /* Don't wedge the queue */
5542 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5546 * If we get to this point, we got an error status back
5547 * from the inquiry and the error status doesn't require
5548 * automatically retrying the command. Therefore, the
5549 * inquiry failed. If we had inquiry information before
5550 * for this device, but this latest inquiry command failed,
5551 * the device has probably gone away. If this device isn't
5552 * already marked unconfigured, notify the peripheral
5553 * drivers that this device is no more.
5555 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5556 /* Send the async notification. */
5557 xpt_async(AC_LOST_DEVICE, path, NULL);
5560 xpt_release_ccb(done_ccb);
5563 case PROBE_MODE_SENSE:
5565 struct ccb_scsiio *csio;
5566 struct scsi_mode_header_6 *mode_hdr;
5568 csio = &done_ccb->csio;
5569 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
5570 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5571 struct scsi_control_page *page;
5574 offset = ((u_int8_t *)&mode_hdr[1])
5575 + mode_hdr->blk_desc_len;
5576 page = (struct scsi_control_page *)offset;
5577 path->device->queue_flags = page->queue_flags;
5578 } else if (cam_periph_error(done_ccb, 0,
5579 SF_RETRY_UA|SF_NO_PRINT,
5580 &softc->saved_ccb) == ERESTART) {
5582 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5583 /* Don't wedge the queue */
5584 xpt_release_devq(done_ccb->ccb_h.path,
5585 /*count*/1, /*run_queue*/TRUE);
5587 xpt_release_ccb(done_ccb);
5588 free(mode_hdr, M_TEMP);
5589 softc->action = PROBE_SERIAL_NUM;
5590 xpt_schedule(periph, priority);
5593 case PROBE_SERIAL_NUM:
5595 struct ccb_scsiio *csio;
5596 struct scsi_vpd_unit_serial_number *serial_buf;
5603 csio = &done_ccb->csio;
5604 priority = done_ccb->ccb_h.pinfo.priority;
5606 (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
5608 /* Clean up from previous instance of this device */
5609 if (path->device->serial_num != NULL) {
5610 free(path->device->serial_num, M_DEVBUF);
5611 path->device->serial_num = NULL;
5612 path->device->serial_num_len = 0;
5615 if (serial_buf == NULL) {
5617 * Don't process the command as it was never sent
5619 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
5620 && (serial_buf->length > 0)) {
5623 path->device->serial_num =
5624 malloc((serial_buf->length + 1),
5625 M_DEVBUF, M_INTWAIT);
5626 bcopy(serial_buf->serial_num,
5627 path->device->serial_num,
5628 serial_buf->length);
5629 path->device->serial_num_len = serial_buf->length;
5630 path->device->serial_num[serial_buf->length] = '\0';
5631 } else if (cam_periph_error(done_ccb, 0,
5632 SF_RETRY_UA|SF_NO_PRINT,
5633 &softc->saved_ccb) == ERESTART) {
5635 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5636 /* Don't wedge the queue */
5637 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5642 * Let's see if we have seen this device before.
5644 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
5646 u_int8_t digest[16];
5651 (unsigned char *)&path->device->inq_data,
5652 sizeof(struct scsi_inquiry_data));
5655 MD5Update(&context, serial_buf->serial_num,
5656 serial_buf->length);
5658 MD5Final(digest, &context);
5659 if (bcmp(softc->digest, digest, 16) == 0)
5663 * XXX Do we need to do a TUR in order to ensure
5664 * that the device really hasn't changed???
5667 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
5668 xpt_async(AC_LOST_DEVICE, path, NULL);
5670 if (serial_buf != NULL)
5671 free(serial_buf, M_TEMP);
5675 * Now that we have all the necessary
5676 * information to safely perform transfer
5677 * negotiations... Controllers don't perform
5678 * any negotiation or tagged queuing until
5679 * after the first XPT_SET_TRAN_SETTINGS ccb is
5680 * received. So, on a new device, just retreive
5681 * the user settings, and set them as the current
5682 * settings to set the device up.
5684 proberequestdefaultnegotiation(periph);
5685 xpt_release_ccb(done_ccb);
5688 * Perform a TUR to allow the controller to
5689 * perform any necessary transfer negotiation.
5691 softc->action = PROBE_TUR_FOR_NEGOTIATION;
5692 xpt_schedule(periph, priority);
5695 xpt_release_ccb(done_ccb);
5698 case PROBE_TUR_FOR_NEGOTIATION:
5699 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5700 /* Don't wedge the queue */
5701 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5705 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5706 xpt_reference_device(path->device);
5708 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
5709 /* Inform the XPT that a new device has been found */
5710 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5711 xpt_action(done_ccb);
5713 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb);
5715 xpt_release_ccb(done_ccb);
5718 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5719 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
5720 done_ccb->ccb_h.status = CAM_REQ_CMP;
5722 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
5723 cam_periph_invalidate(periph);
5724 cam_periph_release(periph);
5726 probeschedule(periph);
5731 probecleanup(struct cam_periph *periph)
5733 free(periph->softc, M_TEMP);
5737 xpt_find_quirk(struct cam_ed *device)
5741 match = cam_quirkmatch((caddr_t)&device->inq_data,
5742 (caddr_t)xpt_quirk_table,
5743 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
5744 sizeof(*xpt_quirk_table), scsi_inquiry_match);
5747 panic("xpt_find_quirk: device didn't match wildcard entry!!");
5749 device->quirk = (struct xpt_quirk_entry *)match;
5753 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
5756 struct cam_sim *sim;
5759 sim = cts->ccb_h.path->bus->sim;
5760 if (async_update == FALSE) {
5761 struct scsi_inquiry_data *inq_data;
5762 struct ccb_pathinq cpi;
5763 struct ccb_trans_settings cur_cts;
5765 if (device == NULL) {
5766 cts->ccb_h.status = CAM_PATH_INVALID;
5767 xpt_done((union ccb *)cts);
5772 * Perform sanity checking against what the
5773 * controller and device can do.
5775 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
5776 cpi.ccb_h.func_code = XPT_PATH_INQ;
5777 xpt_action((union ccb *)&cpi);
5778 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
5779 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5780 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS;
5781 xpt_action((union ccb *)&cur_cts);
5782 inq_data = &device->inq_data;
5784 /* Fill in any gaps in what the user gave us */
5785 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0)
5786 cts->sync_period = cur_cts.sync_period;
5787 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0)
5788 cts->sync_offset = cur_cts.sync_offset;
5789 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0)
5790 cts->bus_width = cur_cts.bus_width;
5791 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) {
5792 cts->flags &= ~CCB_TRANS_DISC_ENB;
5793 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB;
5795 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) {
5796 cts->flags &= ~CCB_TRANS_TAG_ENB;
5797 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB;
5800 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
5801 && (inq_data->flags & SID_Sync) == 0)
5802 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
5803 || (cts->sync_offset == 0)
5804 || (cts->sync_period == 0)) {
5806 cts->sync_period = 0;
5807 cts->sync_offset = 0;
5808 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) {
5810 if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0
5811 && cts->sync_period <= 0x9) {
5813 * Don't allow DT transmission rates if the
5814 * device does not support it.
5816 cts->sync_period = 0xa;
5818 if ((inq_data->spi3data & SID_SPI_IUS) == 0
5819 && cts->sync_period <= 0x8) {
5821 * Don't allow PACE transmission rates
5822 * if the device does support packetized
5825 cts->sync_period = 0x9;
5829 switch (cts->bus_width) {
5830 case MSG_EXT_WDTR_BUS_32_BIT:
5831 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
5832 || (inq_data->flags & SID_WBus32) != 0)
5833 && (cpi.hba_inquiry & PI_WIDE_32) != 0)
5835 /* Fall Through to 16-bit */
5836 case MSG_EXT_WDTR_BUS_16_BIT:
5837 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
5838 || (inq_data->flags & SID_WBus16) != 0)
5839 && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
5840 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
5843 /* Fall Through to 8-bit */
5844 default: /* New bus width?? */
5845 case MSG_EXT_WDTR_BUS_8_BIT:
5846 /* All targets can do this */
5847 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
5851 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) {
5853 * Can't tag queue without disconnection.
5855 cts->flags &= ~CCB_TRANS_TAG_ENB;
5856 cts->valid |= CCB_TRANS_TQ_VALID;
5859 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
5860 || (inq_data->flags & SID_CmdQue) == 0
5861 || (device->queue_flags & SCP_QUEUE_DQUE) != 0
5862 || (device->quirk->mintags == 0)) {
5864 * Can't tag on hardware that doesn't support,
5865 * doesn't have it enabled, or has broken tag support.
5867 cts->flags &= ~CCB_TRANS_TAG_ENB;
5872 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
5876 * If we are transitioning from tags to no-tags or
5877 * vice-versa, we need to carefully freeze and restart
5878 * the queue so that we don't overlap tagged and non-tagged
5879 * commands. We also temporarily stop tags if there is
5880 * a change in transfer negotiation settings to allow
5881 * "tag-less" negotiation.
5883 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5884 || (device->inq_flags & SID_CmdQue) != 0)
5885 device_tagenb = TRUE;
5887 device_tagenb = FALSE;
5889 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0
5890 && device_tagenb == FALSE)
5891 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0
5892 && device_tagenb == TRUE)) {
5894 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) {
5896 * Delay change to use tags until after a
5897 * few commands have gone to this device so
5898 * the controller has time to perform transfer
5899 * negotiations without tagged messages getting
5902 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
5903 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
5905 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
5907 device->inq_flags &= ~SID_CmdQue;
5908 xpt_dev_ccbq_resize(cts->ccb_h.path,
5909 sim->max_dev_openings);
5910 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5911 device->tag_delay_count = 0;
5916 if (async_update == FALSE) {
5918 * If we are currently performing tagged transactions to
5919 * this device and want to change its negotiation parameters,
5920 * go non-tagged for a bit to give the controller a chance to
5921 * negotiate unhampered by tag messages.
5923 if ((device->inq_flags & SID_CmdQue) != 0
5924 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID|
5925 CCB_TRANS_SYNC_OFFSET_VALID|
5926 CCB_TRANS_BUS_WIDTH_VALID)) != 0)
5927 xpt_toggle_tags(cts->ccb_h.path);
5929 (*(sim->sim_action))(sim, (union ccb *)cts);
5933 struct ccb_relsim crs;
5935 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
5937 crs.ccb_h.func_code = XPT_REL_SIMQ;
5938 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5940 = crs.release_timeout
5943 xpt_action((union ccb *)&crs);
5948 xpt_toggle_tags(struct cam_path *path)
5953 * Give controllers a chance to renegotiate
5954 * before starting tag operations. We
5955 * "toggle" tagged queuing off then on
5956 * which causes the tag enable command delay
5957 * counter to come into effect.
5960 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5961 || ((dev->inq_flags & SID_CmdQue) != 0
5962 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
5963 struct ccb_trans_settings cts;
5965 xpt_setup_ccb(&cts.ccb_h, path, 1);
5967 cts.valid = CCB_TRANS_TQ_VALID;
5968 xpt_set_transfer_settings(&cts, path->device,
5969 /*async_update*/TRUE);
5970 cts.flags = CCB_TRANS_TAG_ENB;
5971 xpt_set_transfer_settings(&cts, path->device,
5972 /*async_update*/TRUE);
5977 xpt_start_tags(struct cam_path *path)
5979 struct ccb_relsim crs;
5980 struct cam_ed *device;
5981 struct cam_sim *sim;
5984 device = path->device;
5985 sim = path->bus->sim;
5986 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5987 xpt_freeze_devq(path, /*count*/1);
5988 device->inq_flags |= SID_CmdQue;
5989 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings);
5990 xpt_dev_ccbq_resize(path, newopenings);
5991 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1);
5992 crs.ccb_h.func_code = XPT_REL_SIMQ;
5993 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5995 = crs.release_timeout
5998 xpt_action((union ccb *)&crs);
6001 static int busses_to_config;
6002 static int busses_to_reset;
6005 xptconfigbuscountfunc(struct cam_eb *bus, void *arg)
6007 if (bus->path_id != CAM_XPT_PATH_ID) {
6008 struct cam_path path;
6009 struct ccb_pathinq cpi;
6013 xpt_compile_path(&path, NULL, bus->path_id,
6014 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
6015 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
6016 cpi.ccb_h.func_code = XPT_PATH_INQ;
6017 xpt_action((union ccb *)&cpi);
6018 can_negotiate = cpi.hba_inquiry;
6019 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6020 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0
6023 xpt_release_path(&path);
6030 xptconfigfunc(struct cam_eb *bus, void *arg)
6032 struct cam_path *path;
6033 union ccb *work_ccb;
6035 if (bus->path_id != CAM_XPT_PATH_ID) {
6039 work_ccb = xpt_alloc_ccb();
6040 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id,
6041 CAM_TARGET_WILDCARD,
6042 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){
6043 printf("xptconfigfunc: xpt_create_path failed with "
6044 "status %#x for bus %d\n", status, bus->path_id);
6045 printf("xptconfigfunc: halting bus configuration\n");
6046 xpt_free_ccb(work_ccb);
6048 xpt_finishconfig(xpt_periph, NULL);
6051 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6052 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
6053 xpt_action(work_ccb);
6054 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
6055 printf("xptconfigfunc: CPI failed on bus %d "
6056 "with status %d\n", bus->path_id,
6057 work_ccb->ccb_h.status);
6058 xpt_finishconfig(xpt_periph, work_ccb);
6062 can_negotiate = work_ccb->cpi.hba_inquiry;
6063 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6064 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0
6065 && (can_negotiate != 0)) {
6066 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6067 work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6068 work_ccb->ccb_h.cbfcnp = NULL;
6069 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE,
6070 ("Resetting Bus\n"));
6071 xpt_action(work_ccb);
6072 xpt_finishconfig(xpt_periph, work_ccb);
6074 /* Act as though we performed a successful BUS RESET */
6075 work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6076 xpt_finishconfig(xpt_periph, work_ccb);
6084 xpt_config(void *arg)
6086 /* Now that interrupts are enabled, go find our devices */
6089 /* Setup debugging flags and path */
6090 #ifdef CAM_DEBUG_FLAGS
6091 cam_dflags = CAM_DEBUG_FLAGS;
6092 #else /* !CAM_DEBUG_FLAGS */
6093 cam_dflags = CAM_DEBUG_NONE;
6094 #endif /* CAM_DEBUG_FLAGS */
6095 #ifdef CAM_DEBUG_BUS
6096 if (cam_dflags != CAM_DEBUG_NONE) {
6097 if (xpt_create_path(&cam_dpath, xpt_periph,
6098 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
6099 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
6100 printf("xpt_config: xpt_create_path() failed for debug"
6101 " target %d:%d:%d, debugging disabled\n",
6102 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
6103 cam_dflags = CAM_DEBUG_NONE;
6107 #else /* !CAM_DEBUG_BUS */
6109 #endif /* CAM_DEBUG_BUS */
6110 #endif /* CAMDEBUG */
6113 * Scan all installed busses.
6115 xpt_for_all_busses(xptconfigbuscountfunc, NULL);
6117 if (busses_to_config == 0) {
6118 /* Call manually because we don't have any busses */
6119 xpt_finishconfig(xpt_periph, NULL);
6121 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) {
6122 printf("Waiting %d seconds for SCSI "
6123 "devices to settle\n", SCSI_DELAY/1000);
6125 xpt_for_all_busses(xptconfigfunc, NULL);
6130 * If the given device only has one peripheral attached to it, and if that
6131 * peripheral is the passthrough driver, announce it. This insures that the
6132 * user sees some sort of announcement for every peripheral in their system.
6135 xptpassannouncefunc(struct cam_ed *device, void *arg)
6137 struct cam_periph *periph;
6140 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
6141 periph = SLIST_NEXT(periph, periph_links), i++);
6143 periph = SLIST_FIRST(&device->periphs);
6145 && (strncmp(periph->periph_name, "pass", 4) == 0))
6146 xpt_announce_periph(periph, NULL);
6152 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
6154 struct periph_driver **p_drv;
6156 if (done_ccb != NULL) {
6157 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
6158 ("xpt_finishconfig\n"));
6159 switch(done_ccb->ccb_h.func_code) {
6161 if (done_ccb->ccb_h.status == CAM_REQ_CMP) {
6162 done_ccb->ccb_h.func_code = XPT_SCAN_BUS;
6163 done_ccb->ccb_h.cbfcnp = xpt_finishconfig;
6164 xpt_action(done_ccb);
6170 xpt_free_path(done_ccb->ccb_h.path);
6176 if (busses_to_config == 0) {
6177 /* Register all the peripheral drivers */
6178 /* XXX This will have to change when we have loadable modules */
6179 SET_FOREACH(p_drv, periphdriver_set) {
6184 * Check for devices with no "standard" peripheral driver
6185 * attached. For any devices like that, announce the
6186 * passthrough driver so the user will see something.
6188 xpt_for_all_devices(xptpassannouncefunc, NULL);
6190 /* Release our hook so that the boot can continue. */
6191 config_intrhook_disestablish(xpt_config_hook);
6192 free(xpt_config_hook, M_TEMP);
6193 xpt_config_hook = NULL;
6195 if (done_ccb != NULL)
6196 xpt_free_ccb(done_ccb);
6200 xptaction(struct cam_sim *sim, union ccb *work_ccb)
6202 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
6204 switch (work_ccb->ccb_h.func_code) {
6205 /* Common cases first */
6206 case XPT_PATH_INQ: /* Path routing inquiry */
6208 struct ccb_pathinq *cpi;
6210 cpi = &work_ccb->cpi;
6211 cpi->version_num = 1; /* XXX??? */
6212 cpi->hba_inquiry = 0;
6213 cpi->target_sprt = 0;
6215 cpi->hba_eng_cnt = 0;
6216 cpi->max_target = 0;
6218 cpi->initiator_id = 0;
6219 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
6220 strncpy(cpi->hba_vid, "", HBA_IDLEN);
6221 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
6222 cpi->unit_number = sim->unit_number;
6223 cpi->bus_id = sim->bus_id;
6224 cpi->base_transfer_speed = 0;
6225 cpi->ccb_h.status = CAM_REQ_CMP;
6230 work_ccb->ccb_h.status = CAM_REQ_INVALID;
6237 * The xpt as a "controller" has no interrupt sources, so polling
6241 xptpoll(struct cam_sim *sim)
6246 * Should only be called by the machine interrupt dispatch routines,
6247 * so put these prototypes here instead of in the header.
6251 swi_camnet(void *arg)
6257 swi_cambio(void *arg)
6263 camisr(cam_isrq_t *queue)
6266 struct ccb_hdr *ccb_h;
6269 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) {
6272 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe);
6273 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
6276 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
6281 if (ccb_h->flags & CAM_HIGH_POWER) {
6282 struct highpowerlist *hphead;
6283 struct cam_ed *device;
6284 union ccb *send_ccb;
6286 hphead = &highpowerq;
6288 send_ccb = (union ccb *)STAILQ_FIRST(hphead);
6291 * Increment the count since this command is done.
6296 * Any high powered commands queued up?
6298 if (send_ccb != NULL) {
6299 device = send_ccb->ccb_h.path->device;
6301 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe);
6303 xpt_release_devq(send_ccb->ccb_h.path,
6304 /*count*/1, /*runqueue*/TRUE);
6307 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
6310 dev = ccb_h->path->device;
6313 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
6315 ccb_h->path->bus->sim->devq->send_active--;
6316 ccb_h->path->bus->sim->devq->send_openings++;
6319 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
6320 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
6321 && (dev->ccbq.dev_active == 0))) {
6323 xpt_release_devq(ccb_h->path, /*count*/1,
6327 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6328 && (--dev->tag_delay_count == 0))
6329 xpt_start_tags(ccb_h->path);
6331 if ((dev->ccbq.queue.entries > 0)
6332 && (dev->qfrozen_cnt == 0)
6333 && (device_is_send_queued(dev) == 0)) {
6334 runq = xpt_schedule_dev_sendq(ccb_h->path->bus,
6339 if (ccb_h->status & CAM_RELEASE_SIMQ) {
6340 xpt_release_simq(ccb_h->path->bus->sim,
6342 ccb_h->status &= ~CAM_RELEASE_SIMQ;
6346 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
6347 && (ccb_h->status & CAM_DEV_QFRZN)) {
6348 xpt_release_devq(ccb_h->path, /*count*/1,
6350 ccb_h->status &= ~CAM_DEV_QFRZN;
6352 xpt_run_dev_sendq(ccb_h->path->bus);
6355 /* Call the peripheral driver's callback */
6356 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
6358 /* Raise IPL for while test */