xref: /illumos-gate/usr/src/uts/common/io/scsi/targets/sd.c (revision f1cc607e)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 /*
26  * Copyright (c) 2011 Bayard G. Bell.  All rights reserved.
27  * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
28  * Copyright 2012 DEY Storage Systems, Inc.  All rights reserved.
29  * Copyright 2017 Nexenta Systems, Inc.
30  */
31 /*
32  * Copyright 2011 cyril.galibern@opensvc.com
33  */
34 
35 /*
36  * SCSI disk target driver.
37  */
38 #include <sys/scsi/scsi.h>
39 #include <sys/dkbad.h>
40 #include <sys/dklabel.h>
41 #include <sys/dkio.h>
42 #include <sys/fdio.h>
43 #include <sys/cdio.h>
44 #include <sys/mhd.h>
45 #include <sys/vtoc.h>
46 #include <sys/dktp/fdisk.h>
47 #include <sys/kstat.h>
48 #include <sys/vtrace.h>
49 #include <sys/note.h>
50 #include <sys/thread.h>
51 #include <sys/proc.h>
52 #include <sys/efi_partition.h>
53 #include <sys/var.h>
54 #include <sys/aio_req.h>
55 
56 #ifdef __lock_lint
57 #define	_LP64
58 #define	__amd64
59 #endif
60 
61 #if (defined(__fibre))
62 /* Note: is there a leadville version of the following? */
63 #include <sys/fc4/fcal_linkapp.h>
64 #endif
65 #include <sys/taskq.h>
66 #include <sys/uuid.h>
67 #include <sys/byteorder.h>
68 #include <sys/sdt.h>
69 
70 #include "sd_xbuf.h"
71 
72 #include <sys/scsi/targets/sddef.h>
73 #include <sys/cmlb.h>
74 #include <sys/sysevent/eventdefs.h>
75 #include <sys/sysevent/dev.h>
76 
77 #include <sys/fm/protocol.h>
78 
79 /*
80  * Loadable module info.
81  */
82 #if (defined(__fibre))
83 #define	SD_MODULE_NAME	"SCSI SSA/FCAL Disk Driver"
84 #else /* !__fibre */
85 #define	SD_MODULE_NAME	"SCSI Disk Driver"
86 #endif /* !__fibre */
87 
88 /*
89  * Define the interconnect type, to allow the driver to distinguish
90  * between parallel SCSI (sd) and fibre channel (ssd) behaviors.
91  *
92  * This is really for backward compatibility. In the future, the driver
93  * should actually check the "interconnect-type" property as reported by
94  * the HBA; however at present this property is not defined by all HBAs,
95  * so we will use this #define (1) to permit the driver to run in
96  * backward-compatibility mode; and (2) to print a notification message
97  * if an FC HBA does not support the "interconnect-type" property.  The
98  * behavior of the driver will be to assume parallel SCSI behaviors unless
99  * the "interconnect-type" property is defined by the HBA **AND** has a
100  * value of either INTERCONNECT_FIBRE, INTERCONNECT_SSA, or
101  * INTERCONNECT_FABRIC, in which case the driver will assume Fibre
102  * Channel behaviors (as per the old ssd).  (Note that the
103  * INTERCONNECT_1394 and INTERCONNECT_USB types are not supported and
104  * will result in the driver assuming parallel SCSI behaviors.)
105  *
106  * (see common/sys/scsi/impl/services.h)
107  *
108  * Note: For ssd semantics, don't use INTERCONNECT_FABRIC as the default
109  * since some FC HBAs may already support that, and there is some code in
110  * the driver that already looks for it.  Using INTERCONNECT_FABRIC as the
111  * default would confuse that code, and besides things should work fine
112  * anyways if the FC HBA already reports INTERCONNECT_FABRIC for the
113  * "interconnect_type" property.
114  *
115  */
116 #if (defined(__fibre))
117 #define	SD_DEFAULT_INTERCONNECT_TYPE	SD_INTERCONNECT_FIBRE
118 #else
119 #define	SD_DEFAULT_INTERCONNECT_TYPE	SD_INTERCONNECT_PARALLEL
120 #endif
121 
122 /*
123  * The name of the driver, established from the module name in _init.
124  */
125 static	char *sd_label			= NULL;
126 
127 /*
128  * Driver name is unfortunately prefixed on some driver.conf properties.
129  */
130 #if (defined(__fibre))
131 #define	sd_max_xfer_size		ssd_max_xfer_size
132 #define	sd_config_list			ssd_config_list
133 static	char *sd_max_xfer_size		= "ssd_max_xfer_size";
134 static	char *sd_config_list		= "ssd-config-list";
135 #else
136 static	char *sd_max_xfer_size		= "sd_max_xfer_size";
137 static	char *sd_config_list		= "sd-config-list";
138 #endif
139 
140 /*
141  * Driver global variables
142  */
143 
144 #if (defined(__fibre))
145 /*
146  * These #defines are to avoid namespace collisions that occur because this
147  * code is currently used to compile two separate driver modules: sd and ssd.
148  * All global variables need to be treated this way (even if declared static)
149  * in order to allow the debugger to resolve the names properly.
150  * It is anticipated that in the near future the ssd module will be obsoleted,
151  * at which time this namespace issue should go away.
152  */
153 #define	sd_state			ssd_state
154 #define	sd_io_time			ssd_io_time
155 #define	sd_failfast_enable		ssd_failfast_enable
156 #define	sd_ua_retry_count		ssd_ua_retry_count
157 #define	sd_report_pfa			ssd_report_pfa
158 #define	sd_max_throttle			ssd_max_throttle
159 #define	sd_min_throttle			ssd_min_throttle
160 #define	sd_rot_delay			ssd_rot_delay
161 
162 #define	sd_retry_on_reservation_conflict	\
163 					ssd_retry_on_reservation_conflict
164 #define	sd_reinstate_resv_delay		ssd_reinstate_resv_delay
165 #define	sd_resv_conflict_name		ssd_resv_conflict_name
166 
167 #define	sd_component_mask		ssd_component_mask
168 #define	sd_level_mask			ssd_level_mask
169 #define	sd_debug_un			ssd_debug_un
170 #define	sd_error_level			ssd_error_level
171 
172 #define	sd_xbuf_active_limit		ssd_xbuf_active_limit
173 #define	sd_xbuf_reserve_limit		ssd_xbuf_reserve_limit
174 
175 #define	sd_tr				ssd_tr
176 #define	sd_reset_throttle_timeout	ssd_reset_throttle_timeout
177 #define	sd_qfull_throttle_timeout	ssd_qfull_throttle_timeout
178 #define	sd_qfull_throttle_enable	ssd_qfull_throttle_enable
179 #define	sd_check_media_time		ssd_check_media_time
180 #define	sd_wait_cmds_complete		ssd_wait_cmds_complete
181 #define	sd_label_mutex			ssd_label_mutex
182 #define	sd_detach_mutex			ssd_detach_mutex
183 #define	sd_log_buf			ssd_log_buf
184 #define	sd_log_mutex			ssd_log_mutex
185 
186 #define	sd_disk_table			ssd_disk_table
187 #define	sd_disk_table_size		ssd_disk_table_size
188 #define	sd_sense_mutex			ssd_sense_mutex
189 #define	sd_cdbtab			ssd_cdbtab
190 
191 #define	sd_cb_ops			ssd_cb_ops
192 #define	sd_ops				ssd_ops
193 #define	sd_additional_codes		ssd_additional_codes
194 #define	sd_tgops			ssd_tgops
195 
196 #define	sd_minor_data			ssd_minor_data
197 #define	sd_minor_data_efi		ssd_minor_data_efi
198 
199 #define	sd_tq				ssd_tq
200 #define	sd_wmr_tq			ssd_wmr_tq
201 #define	sd_taskq_name			ssd_taskq_name
202 #define	sd_wmr_taskq_name		ssd_wmr_taskq_name
203 #define	sd_taskq_minalloc		ssd_taskq_minalloc
204 #define	sd_taskq_maxalloc		ssd_taskq_maxalloc
205 
206 #define	sd_dump_format_string		ssd_dump_format_string
207 
208 #define	sd_iostart_chain		ssd_iostart_chain
209 #define	sd_iodone_chain			ssd_iodone_chain
210 
211 #define	sd_pm_idletime			ssd_pm_idletime
212 
213 #define	sd_force_pm_supported		ssd_force_pm_supported
214 
215 #define	sd_dtype_optical_bind		ssd_dtype_optical_bind
216 
217 #define	sd_ssc_init			ssd_ssc_init
218 #define	sd_ssc_send			ssd_ssc_send
219 #define	sd_ssc_fini			ssd_ssc_fini
220 #define	sd_ssc_assessment		ssd_ssc_assessment
221 #define	sd_ssc_post			ssd_ssc_post
222 #define	sd_ssc_print			ssd_ssc_print
223 #define	sd_ssc_ereport_post		ssd_ssc_ereport_post
224 #define	sd_ssc_set_info			ssd_ssc_set_info
225 #define	sd_ssc_extract_info		ssd_ssc_extract_info
226 
227 #endif
228 
229 #ifdef	SDDEBUG
230 int	sd_force_pm_supported		= 0;
231 #endif	/* SDDEBUG */
232 
233 void *sd_state				= NULL;
234 int sd_io_time				= SD_IO_TIME;
235 int sd_failfast_enable			= 1;
236 int sd_ua_retry_count			= SD_UA_RETRY_COUNT;
237 int sd_report_pfa			= 1;
238 int sd_max_throttle			= SD_MAX_THROTTLE;
239 int sd_min_throttle			= SD_MIN_THROTTLE;
240 int sd_rot_delay			= 4; /* Default 4ms Rotation delay */
241 int sd_qfull_throttle_enable		= TRUE;
242 
243 int sd_retry_on_reservation_conflict	= 1;
244 int sd_reinstate_resv_delay		= SD_REINSTATE_RESV_DELAY;
245 _NOTE(SCHEME_PROTECTS_DATA("safe sharing", sd_reinstate_resv_delay))
246 
247 static int sd_dtype_optical_bind	= -1;
248 
249 /* Note: the following is not a bug, it really is "sd_" and not "ssd_" */
250 static	char *sd_resv_conflict_name	= "sd_retry_on_reservation_conflict";
251 
252 /*
253  * Global data for debug logging. To enable debug printing, sd_component_mask
254  * and sd_level_mask should be set to the desired bit patterns as outlined in
255  * sddef.h.
256  */
257 uint_t	sd_component_mask		= 0x0;
258 uint_t	sd_level_mask			= 0x0;
259 struct	sd_lun *sd_debug_un		= NULL;
260 uint_t	sd_error_level			= SCSI_ERR_RETRYABLE;
261 
262 /* Note: these may go away in the future... */
263 static uint32_t	sd_xbuf_active_limit	= 512;
264 static uint32_t sd_xbuf_reserve_limit	= 16;
265 
266 static struct sd_resv_reclaim_request	sd_tr = { NULL, NULL, NULL, 0, 0, 0 };
267 
268 /*
269  * Timer value used to reset the throttle after it has been reduced
270  * (typically in response to TRAN_BUSY or STATUS_QFULL)
271  */
272 static int sd_reset_throttle_timeout	= SD_RESET_THROTTLE_TIMEOUT;
273 static int sd_qfull_throttle_timeout	= SD_QFULL_THROTTLE_TIMEOUT;
274 
275 /*
276  * Interval value associated with the media change scsi watch.
277  */
278 static int sd_check_media_time		= 3000000;
279 
280 /*
281  * Wait value used for in progress operations during a DDI_SUSPEND
282  */
283 static int sd_wait_cmds_complete	= SD_WAIT_CMDS_COMPLETE;
284 
285 /*
286  * sd_label_mutex protects a static buffer used in the disk label
287  * component of the driver
288  */
289 static kmutex_t sd_label_mutex;
290 
291 /*
292  * sd_detach_mutex protects un_layer_count, un_detach_count, and
293  * un_opens_in_progress in the sd_lun structure.
294  */
295 static kmutex_t sd_detach_mutex;
296 
297 _NOTE(MUTEX_PROTECTS_DATA(sd_detach_mutex,
298 	sd_lun::{un_layer_count un_detach_count un_opens_in_progress}))
299 
300 /*
301  * Global buffer and mutex for debug logging
302  */
303 static char	sd_log_buf[1024];
304 static kmutex_t	sd_log_mutex;
305 
306 /*
307  * Structs and globals for recording attached lun information.
308  * This maintains a chain. Each node in the chain represents a SCSI controller.
309  * The structure records the number of luns attached to each target connected
310  * with the controller.
311  * For parallel scsi device only.
312  */
313 struct sd_scsi_hba_tgt_lun {
314 	struct sd_scsi_hba_tgt_lun	*next;
315 	dev_info_t			*pdip;
316 	int				nlun[NTARGETS_WIDE];
317 };
318 
319 /*
320  * Flag to indicate the lun is attached or detached
321  */
322 #define	SD_SCSI_LUN_ATTACH	0
323 #define	SD_SCSI_LUN_DETACH	1
324 
325 static kmutex_t	sd_scsi_target_lun_mutex;
326 static struct sd_scsi_hba_tgt_lun	*sd_scsi_target_lun_head = NULL;
327 
328 _NOTE(MUTEX_PROTECTS_DATA(sd_scsi_target_lun_mutex,
329     sd_scsi_hba_tgt_lun::next sd_scsi_hba_tgt_lun::pdip))
330 
331 _NOTE(MUTEX_PROTECTS_DATA(sd_scsi_target_lun_mutex,
332     sd_scsi_target_lun_head))
333 
334 /*
335  * "Smart" Probe Caching structs, globals, #defines, etc.
336  * For parallel scsi and non-self-identify device only.
337  */
338 
339 /*
340  * The following resources and routines are implemented to support
341  * "smart" probing, which caches the scsi_probe() results in an array,
342  * in order to help avoid long probe times.
343  */
344 struct sd_scsi_probe_cache {
345 	struct	sd_scsi_probe_cache	*next;
346 	dev_info_t	*pdip;
347 	int		cache[NTARGETS_WIDE];
348 };
349 
350 static kmutex_t	sd_scsi_probe_cache_mutex;
351 static struct	sd_scsi_probe_cache *sd_scsi_probe_cache_head = NULL;
352 
353 /*
354  * Really we only need protection on the head of the linked list, but
355  * better safe than sorry.
356  */
357 _NOTE(MUTEX_PROTECTS_DATA(sd_scsi_probe_cache_mutex,
358     sd_scsi_probe_cache::next sd_scsi_probe_cache::pdip))
359 
360 _NOTE(MUTEX_PROTECTS_DATA(sd_scsi_probe_cache_mutex,
361     sd_scsi_probe_cache_head))
362 
363 /*
364  * Power attribute table
365  */
366 static sd_power_attr_ss sd_pwr_ss = {
367 	{ "NAME=spindle-motor", "0=off", "1=on", NULL },
368 	{0, 100},
369 	{30, 0},
370 	{20000, 0}
371 };
372 
373 static sd_power_attr_pc sd_pwr_pc = {
374 	{ "NAME=spindle-motor", "0=stopped", "1=standby", "2=idle",
375 		"3=active", NULL },
376 	{0, 0, 0, 100},
377 	{90, 90, 20, 0},
378 	{15000, 15000, 1000, 0}
379 };
380 
381 /*
382  * Power level to power condition
383  */
384 static int sd_pl2pc[] = {
385 	SD_TARGET_START_VALID,
386 	SD_TARGET_STANDBY,
387 	SD_TARGET_IDLE,
388 	SD_TARGET_ACTIVE
389 };
390 
391 /*
392  * Vendor specific data name property declarations
393  */
394 
395 #if defined(__fibre) || defined(__i386) ||defined(__amd64)
396 
397 static sd_tunables seagate_properties = {
398 	SEAGATE_THROTTLE_VALUE,
399 	0,
400 	0,
401 	0,
402 	0,
403 	0,
404 	0,
405 	0,
406 	0
407 };
408 
409 
410 static sd_tunables fujitsu_properties = {
411 	FUJITSU_THROTTLE_VALUE,
412 	0,
413 	0,
414 	0,
415 	0,
416 	0,
417 	0,
418 	0,
419 	0
420 };
421 
422 static sd_tunables ibm_properties = {
423 	IBM_THROTTLE_VALUE,
424 	0,
425 	0,
426 	0,
427 	0,
428 	0,
429 	0,
430 	0,
431 	0
432 };
433 
434 static sd_tunables purple_properties = {
435 	PURPLE_THROTTLE_VALUE,
436 	0,
437 	0,
438 	PURPLE_BUSY_RETRIES,
439 	PURPLE_RESET_RETRY_COUNT,
440 	PURPLE_RESERVE_RELEASE_TIME,
441 	0,
442 	0,
443 	0
444 };
445 
446 static sd_tunables sve_properties = {
447 	SVE_THROTTLE_VALUE,
448 	0,
449 	0,
450 	SVE_BUSY_RETRIES,
451 	SVE_RESET_RETRY_COUNT,
452 	SVE_RESERVE_RELEASE_TIME,
453 	SVE_MIN_THROTTLE_VALUE,
454 	SVE_DISKSORT_DISABLED_FLAG,
455 	0
456 };
457 
458 static sd_tunables maserati_properties = {
459 	0,
460 	0,
461 	0,
462 	0,
463 	0,
464 	0,
465 	0,
466 	MASERATI_DISKSORT_DISABLED_FLAG,
467 	MASERATI_LUN_RESET_ENABLED_FLAG
468 };
469 
470 static sd_tunables pirus_properties = {
471 	PIRUS_THROTTLE_VALUE,
472 	0,
473 	PIRUS_NRR_COUNT,
474 	PIRUS_BUSY_RETRIES,
475 	PIRUS_RESET_RETRY_COUNT,
476 	0,
477 	PIRUS_MIN_THROTTLE_VALUE,
478 	PIRUS_DISKSORT_DISABLED_FLAG,
479 	PIRUS_LUN_RESET_ENABLED_FLAG
480 };
481 
482 #endif
483 
484 #if (defined(__sparc) && !defined(__fibre)) || \
485 	(defined(__i386) || defined(__amd64))
486 
487 
488 static sd_tunables elite_properties = {
489 	ELITE_THROTTLE_VALUE,
490 	0,
491 	0,
492 	0,
493 	0,
494 	0,
495 	0,
496 	0,
497 	0
498 };
499 
500 static sd_tunables st31200n_properties = {
501 	ST31200N_THROTTLE_VALUE,
502 	0,
503 	0,
504 	0,
505 	0,
506 	0,
507 	0,
508 	0,
509 	0
510 };
511 
512 #endif /* Fibre or not */
513 
514 static sd_tunables lsi_properties_scsi = {
515 	LSI_THROTTLE_VALUE,
516 	0,
517 	LSI_NOTREADY_RETRIES,
518 	0,
519 	0,
520 	0,
521 	0,
522 	0,
523 	0
524 };
525 
526 static sd_tunables symbios_properties = {
527 	SYMBIOS_THROTTLE_VALUE,
528 	0,
529 	SYMBIOS_NOTREADY_RETRIES,
530 	0,
531 	0,
532 	0,
533 	0,
534 	0,
535 	0
536 };
537 
538 static sd_tunables lsi_properties = {
539 	0,
540 	0,
541 	LSI_NOTREADY_RETRIES,
542 	0,
543 	0,
544 	0,
545 	0,
546 	0,
547 	0
548 };
549 
550 static sd_tunables lsi_oem_properties = {
551 	0,
552 	0,
553 	LSI_OEM_NOTREADY_RETRIES,
554 	0,
555 	0,
556 	0,
557 	0,
558 	0,
559 	0,
560 	1
561 };
562 
563 
564 
565 #if (defined(SD_PROP_TST))
566 
567 #define	SD_TST_CTYPE_VAL	CTYPE_CDROM
568 #define	SD_TST_THROTTLE_VAL	16
569 #define	SD_TST_NOTREADY_VAL	12
570 #define	SD_TST_BUSY_VAL		60
571 #define	SD_TST_RST_RETRY_VAL	36
572 #define	SD_TST_RSV_REL_TIME	60
573 
574 static sd_tunables tst_properties = {
575 	SD_TST_THROTTLE_VAL,
576 	SD_TST_CTYPE_VAL,
577 	SD_TST_NOTREADY_VAL,
578 	SD_TST_BUSY_VAL,
579 	SD_TST_RST_RETRY_VAL,
580 	SD_TST_RSV_REL_TIME,
581 	0,
582 	0,
583 	0
584 };
585 #endif
586 
587 /* This is similar to the ANSI toupper implementation */
588 #define	SD_TOUPPER(C)	(((C) >= 'a' && (C) <= 'z') ? (C) - 'a' + 'A' : (C))
589 
590 /*
591  * Static Driver Configuration Table
592  *
593  * This is the table of disks which need throttle adjustment (or, perhaps
594  * something else as defined by the flags at a future time.)  device_id
595  * is a string consisting of concatenated vid (vendor), pid (product/model)
596  * and revision strings as defined in the scsi_inquiry structure.  Offsets of
597  * the parts of the string are as defined by the sizes in the scsi_inquiry
598  * structure.  Device type is searched as far as the device_id string is
599  * defined.  Flags defines which values are to be set in the driver from the
600  * properties list.
601  *
602  * Entries below which begin and end with a "*" are a special case.
603  * These do not have a specific vendor, and the string which follows
604  * can appear anywhere in the 16 byte PID portion of the inquiry data.
605  *
606  * Entries below which begin and end with a " " (blank) are a special
607  * case. The comparison function will treat multiple consecutive blanks
608  * as equivalent to a single blank. For example, this causes a
609  * sd_disk_table entry of " NEC CDROM " to match a device's id string
610  * of  "NEC       CDROM".
611  *
612  * Note: The MD21 controller type has been obsoleted.
613  *	 ST318202F is a Legacy device
614  *	 MAM3182FC, MAM3364FC, MAM3738FC do not appear to have ever been
615  *	 made with an FC connection. The entries here are a legacy.
616  */
617 static sd_disk_config_t sd_disk_table[] = {
618 #if defined(__fibre) || defined(__i386) || defined(__amd64)
619 	{ "SEAGATE ST34371FC", SD_CONF_BSET_THROTTLE, &seagate_properties },
620 	{ "SEAGATE ST19171FC", SD_CONF_BSET_THROTTLE, &seagate_properties },
621 	{ "SEAGATE ST39102FC", SD_CONF_BSET_THROTTLE, &seagate_properties },
622 	{ "SEAGATE ST39103FC", SD_CONF_BSET_THROTTLE, &seagate_properties },
623 	{ "SEAGATE ST118273F", SD_CONF_BSET_THROTTLE, &seagate_properties },
624 	{ "SEAGATE ST318202F", SD_CONF_BSET_THROTTLE, &seagate_properties },
625 	{ "SEAGATE ST318203F", SD_CONF_BSET_THROTTLE, &seagate_properties },
626 	{ "SEAGATE ST136403F", SD_CONF_BSET_THROTTLE, &seagate_properties },
627 	{ "SEAGATE ST318304F", SD_CONF_BSET_THROTTLE, &seagate_properties },
628 	{ "SEAGATE ST336704F", SD_CONF_BSET_THROTTLE, &seagate_properties },
629 	{ "SEAGATE ST373405F", SD_CONF_BSET_THROTTLE, &seagate_properties },
630 	{ "SEAGATE ST336605F", SD_CONF_BSET_THROTTLE, &seagate_properties },
631 	{ "SEAGATE ST336752F", SD_CONF_BSET_THROTTLE, &seagate_properties },
632 	{ "SEAGATE ST318452F", SD_CONF_BSET_THROTTLE, &seagate_properties },
633 	{ "FUJITSU MAG3091F",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
634 	{ "FUJITSU MAG3182F",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
635 	{ "FUJITSU MAA3182F",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
636 	{ "FUJITSU MAF3364F",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
637 	{ "FUJITSU MAL3364F",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
638 	{ "FUJITSU MAL3738F",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
639 	{ "FUJITSU MAM3182FC",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
640 	{ "FUJITSU MAM3364FC",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
641 	{ "FUJITSU MAM3738FC",  SD_CONF_BSET_THROTTLE, &fujitsu_properties },
642 	{ "IBM     DDYFT1835",  SD_CONF_BSET_THROTTLE, &ibm_properties },
643 	{ "IBM     DDYFT3695",  SD_CONF_BSET_THROTTLE, &ibm_properties },
644 	{ "IBM     IC35LF2D2",  SD_CONF_BSET_THROTTLE, &ibm_properties },
645 	{ "IBM     IC35LF2PR",  SD_CONF_BSET_THROTTLE, &ibm_properties },
646 	{ "IBM     1724-100",   SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
647 	{ "IBM     1726-2xx",   SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
648 	{ "IBM     1726-22x",   SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
649 	{ "IBM     1726-4xx",   SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
650 	{ "IBM     1726-42x",   SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
651 	{ "IBM     1726-3xx",   SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
652 	{ "IBM     3526",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
653 	{ "IBM     3542",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
654 	{ "IBM     3552",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
655 	{ "IBM     1722",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
656 	{ "IBM     1742",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
657 	{ "IBM     1815",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
658 	{ "IBM     FAStT",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
659 	{ "IBM     1814",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
660 	{ "IBM     1814-200",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
661 	{ "IBM     1818",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
662 	{ "DELL    MD3000",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
663 	{ "DELL    MD3000i",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
664 	{ "LSI     INF",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
665 	{ "ENGENIO INF",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
666 	{ "SGI     TP",		SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
667 	{ "SGI     IS",		SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
668 	{ "*CSM100_*",		SD_CONF_BSET_NRR_COUNT |
669 			SD_CONF_BSET_CACHE_IS_NV, &lsi_oem_properties },
670 	{ "*CSM200_*",		SD_CONF_BSET_NRR_COUNT |
671 			SD_CONF_BSET_CACHE_IS_NV, &lsi_oem_properties },
672 	{ "Fujitsu SX300",	SD_CONF_BSET_THROTTLE,  &lsi_oem_properties },
673 	{ "LSI",		SD_CONF_BSET_NRR_COUNT, &lsi_properties },
674 	{ "SUN     T3", SD_CONF_BSET_THROTTLE |
675 			SD_CONF_BSET_BSY_RETRY_COUNT|
676 			SD_CONF_BSET_RST_RETRIES|
677 			SD_CONF_BSET_RSV_REL_TIME,
678 		&purple_properties },
679 	{ "SUN     SESS01", SD_CONF_BSET_THROTTLE |
680 		SD_CONF_BSET_BSY_RETRY_COUNT|
681 		SD_CONF_BSET_RST_RETRIES|
682 		SD_CONF_BSET_RSV_REL_TIME|
683 		SD_CONF_BSET_MIN_THROTTLE|
684 		SD_CONF_BSET_DISKSORT_DISABLED,
685 		&sve_properties },
686 	{ "SUN     T4", SD_CONF_BSET_THROTTLE |
687 			SD_CONF_BSET_BSY_RETRY_COUNT|
688 			SD_CONF_BSET_RST_RETRIES|
689 			SD_CONF_BSET_RSV_REL_TIME,
690 		&purple_properties },
691 	{ "SUN     SVE01", SD_CONF_BSET_DISKSORT_DISABLED |
692 		SD_CONF_BSET_LUN_RESET_ENABLED,
693 		&maserati_properties },
694 	{ "SUN     SE6920", SD_CONF_BSET_THROTTLE |
695 		SD_CONF_BSET_NRR_COUNT|
696 		SD_CONF_BSET_BSY_RETRY_COUNT|
697 		SD_CONF_BSET_RST_RETRIES|
698 		SD_CONF_BSET_MIN_THROTTLE|
699 		SD_CONF_BSET_DISKSORT_DISABLED|
700 		SD_CONF_BSET_LUN_RESET_ENABLED,
701 		&pirus_properties },
702 	{ "SUN     SE6940", SD_CONF_BSET_THROTTLE |
703 		SD_CONF_BSET_NRR_COUNT|
704 		SD_CONF_BSET_BSY_RETRY_COUNT|
705 		SD_CONF_BSET_RST_RETRIES|
706 		SD_CONF_BSET_MIN_THROTTLE|
707 		SD_CONF_BSET_DISKSORT_DISABLED|
708 		SD_CONF_BSET_LUN_RESET_ENABLED,
709 		&pirus_properties },
710 	{ "SUN     StorageTek 6920", SD_CONF_BSET_THROTTLE |
711 		SD_CONF_BSET_NRR_COUNT|
712 		SD_CONF_BSET_BSY_RETRY_COUNT|
713 		SD_CONF_BSET_RST_RETRIES|
714 		SD_CONF_BSET_MIN_THROTTLE|
715 		SD_CONF_BSET_DISKSORT_DISABLED|
716 		SD_CONF_BSET_LUN_RESET_ENABLED,
717 		&pirus_properties },
718 	{ "SUN     StorageTek 6940", SD_CONF_BSET_THROTTLE |
719 		SD_CONF_BSET_NRR_COUNT|
720 		SD_CONF_BSET_BSY_RETRY_COUNT|
721 		SD_CONF_BSET_RST_RETRIES|
722 		SD_CONF_BSET_MIN_THROTTLE|
723 		SD_CONF_BSET_DISKSORT_DISABLED|
724 		SD_CONF_BSET_LUN_RESET_ENABLED,
725 		&pirus_properties },
726 	{ "SUN     PSX1000", SD_CONF_BSET_THROTTLE |
727 		SD_CONF_BSET_NRR_COUNT|
728 		SD_CONF_BSET_BSY_RETRY_COUNT|
729 		SD_CONF_BSET_RST_RETRIES|
730 		SD_CONF_BSET_MIN_THROTTLE|
731 		SD_CONF_BSET_DISKSORT_DISABLED|
732 		SD_CONF_BSET_LUN_RESET_ENABLED,
733 		&pirus_properties },
734 	{ "SUN     SE6330", SD_CONF_BSET_THROTTLE |
735 		SD_CONF_BSET_NRR_COUNT|
736 		SD_CONF_BSET_BSY_RETRY_COUNT|
737 		SD_CONF_BSET_RST_RETRIES|
738 		SD_CONF_BSET_MIN_THROTTLE|
739 		SD_CONF_BSET_DISKSORT_DISABLED|
740 		SD_CONF_BSET_LUN_RESET_ENABLED,
741 		&pirus_properties },
742 	{ "SUN     STK6580_6780", SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
743 	{ "SUN     SUN_6180", SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
744 	{ "STK     OPENstorage", SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
745 	{ "STK     OpenStorage", SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
746 	{ "STK     BladeCtlr",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
747 	{ "STK     FLEXLINE",	SD_CONF_BSET_NRR_COUNT, &lsi_oem_properties },
748 	{ "SYMBIOS", SD_CONF_BSET_NRR_COUNT, &symbios_properties },
749 #endif /* fibre or NON-sparc platforms */
750 #if ((defined(__sparc) && !defined(__fibre)) ||\
751 	(defined(__i386) || defined(__amd64)))
752 	{ "SEAGATE ST42400N", SD_CONF_BSET_THROTTLE, &elite_properties },
753 	{ "SEAGATE ST31200N", SD_CONF_BSET_THROTTLE, &st31200n_properties },
754 	{ "SEAGATE ST41600N", SD_CONF_BSET_TUR_CHECK, NULL },
755 	{ "CONNER  CP30540",  SD_CONF_BSET_NOCACHE,  NULL },
756 	{ "*SUN0104*", SD_CONF_BSET_FAB_DEVID, NULL },
757 	{ "*SUN0207*", SD_CONF_BSET_FAB_DEVID, NULL },
758 	{ "*SUN0327*", SD_CONF_BSET_FAB_DEVID, NULL },
759 	{ "*SUN0340*", SD_CONF_BSET_FAB_DEVID, NULL },
760 	{ "*SUN0424*", SD_CONF_BSET_FAB_DEVID, NULL },
761 	{ "*SUN0669*", SD_CONF_BSET_FAB_DEVID, NULL },
762 	{ "*SUN1.0G*", SD_CONF_BSET_FAB_DEVID, NULL },
763 	{ "SYMBIOS INF-01-00       ", SD_CONF_BSET_FAB_DEVID, NULL },
764 	{ "SYMBIOS", SD_CONF_BSET_THROTTLE|SD_CONF_BSET_NRR_COUNT,
765 	    &symbios_properties },
766 	{ "LSI", SD_CONF_BSET_THROTTLE | SD_CONF_BSET_NRR_COUNT,
767 	    &lsi_properties_scsi },
768 #if defined(__i386) || defined(__amd64)
769 	{ " NEC CD-ROM DRIVE:260 ", (SD_CONF_BSET_PLAYMSF_BCD
770 				    | SD_CONF_BSET_READSUB_BCD
771 				    | SD_CONF_BSET_READ_TOC_ADDR_BCD
772 				    | SD_CONF_BSET_NO_READ_HEADER
773 				    | SD_CONF_BSET_READ_CD_XD4), NULL },
774 
775 	{ " NEC CD-ROM DRIVE:270 ", (SD_CONF_BSET_PLAYMSF_BCD
776 				    | SD_CONF_BSET_READSUB_BCD
777 				    | SD_CONF_BSET_READ_TOC_ADDR_BCD
778 				    | SD_CONF_BSET_NO_READ_HEADER
779 				    | SD_CONF_BSET_READ_CD_XD4), NULL },
780 #endif /* __i386 || __amd64 */
781 #endif /* sparc NON-fibre or NON-sparc platforms */
782 
783 #if (defined(SD_PROP_TST))
784 	{ "VENDOR  PRODUCT ", (SD_CONF_BSET_THROTTLE
785 				| SD_CONF_BSET_CTYPE
786 				| SD_CONF_BSET_NRR_COUNT
787 				| SD_CONF_BSET_FAB_DEVID
788 				| SD_CONF_BSET_NOCACHE
789 				| SD_CONF_BSET_BSY_RETRY_COUNT
790 				| SD_CONF_BSET_PLAYMSF_BCD
791 				| SD_CONF_BSET_READSUB_BCD
792 				| SD_CONF_BSET_READ_TOC_TRK_BCD
793 				| SD_CONF_BSET_READ_TOC_ADDR_BCD
794 				| SD_CONF_BSET_NO_READ_HEADER
795 				| SD_CONF_BSET_READ_CD_XD4
796 				| SD_CONF_BSET_RST_RETRIES
797 				| SD_CONF_BSET_RSV_REL_TIME
798 				| SD_CONF_BSET_TUR_CHECK), &tst_properties},
799 #endif
800 };
801 
802 static const int sd_disk_table_size =
803 	sizeof (sd_disk_table)/ sizeof (sd_disk_config_t);
804 
805 /*
806  * Emulation mode disk drive VID/PID table
807  */
808 static char sd_flash_dev_table[][25] = {
809 	"ATA     MARVELL SD88SA02",
810 	"MARVELL SD88SA02",
811 	"TOSHIBA THNSNV05",
812 };
813 
814 static const int sd_flash_dev_table_size =
815 	sizeof (sd_flash_dev_table) / sizeof (sd_flash_dev_table[0]);
816 
817 #define	SD_INTERCONNECT_PARALLEL	0
818 #define	SD_INTERCONNECT_FABRIC		1
819 #define	SD_INTERCONNECT_FIBRE		2
820 #define	SD_INTERCONNECT_SSA		3
821 #define	SD_INTERCONNECT_SATA		4
822 #define	SD_INTERCONNECT_SAS		5
823 
824 #define	SD_IS_PARALLEL_SCSI(un)		\
825 	((un)->un_interconnect_type == SD_INTERCONNECT_PARALLEL)
826 #define	SD_IS_SERIAL(un)		\
827 	(((un)->un_interconnect_type == SD_INTERCONNECT_SATA) ||\
828 	((un)->un_interconnect_type == SD_INTERCONNECT_SAS))
829 
830 /*
831  * Definitions used by device id registration routines
832  */
833 #define	VPD_HEAD_OFFSET		3	/* size of head for vpd page */
834 #define	VPD_PAGE_LENGTH		3	/* offset for pge length data */
835 #define	VPD_MODE_PAGE		1	/* offset into vpd pg for "page code" */
836 
837 static kmutex_t sd_sense_mutex = {0};
838 
839 /*
840  * Macros for updates of the driver state
841  */
842 #define	New_state(un, s)        \
843 	(un)->un_last_state = (un)->un_state, (un)->un_state = (s)
844 #define	Restore_state(un)	\
845 	{ uchar_t tmp = (un)->un_last_state; New_state((un), tmp); }
846 
847 static struct sd_cdbinfo sd_cdbtab[] = {
848 	{ CDB_GROUP0, 0x00,	   0x1FFFFF,   0xFF,	    },
849 	{ CDB_GROUP1, SCMD_GROUP1, 0xFFFFFFFF, 0xFFFF,	    },
850 	{ CDB_GROUP5, SCMD_GROUP5, 0xFFFFFFFF, 0xFFFFFFFF,  },
851 	{ CDB_GROUP4, SCMD_GROUP4, 0xFFFFFFFFFFFFFFFF, 0xFFFFFFFF, },
852 };
853 
854 /*
855  * Specifies the number of seconds that must have elapsed since the last
856  * cmd. has completed for a device to be declared idle to the PM framework.
857  */
858 static int sd_pm_idletime = 1;
859 
860 /*
861  * Internal function prototypes
862  */
863 
864 #if (defined(__fibre))
865 /*
866  * These #defines are to avoid namespace collisions that occur because this
867  * code is currently used to compile two separate driver modules: sd and ssd.
868  * All function names need to be treated this way (even if declared static)
869  * in order to allow the debugger to resolve the names properly.
870  * It is anticipated that in the near future the ssd module will be obsoleted,
871  * at which time this ugliness should go away.
872  */
873 #define	sd_log_trace			ssd_log_trace
874 #define	sd_log_info			ssd_log_info
875 #define	sd_log_err			ssd_log_err
876 #define	sdprobe				ssdprobe
877 #define	sdinfo				ssdinfo
878 #define	sd_prop_op			ssd_prop_op
879 #define	sd_scsi_probe_cache_init	ssd_scsi_probe_cache_init
880 #define	sd_scsi_probe_cache_fini	ssd_scsi_probe_cache_fini
881 #define	sd_scsi_clear_probe_cache	ssd_scsi_clear_probe_cache
882 #define	sd_scsi_probe_with_cache	ssd_scsi_probe_with_cache
883 #define	sd_scsi_target_lun_init		ssd_scsi_target_lun_init
884 #define	sd_scsi_target_lun_fini		ssd_scsi_target_lun_fini
885 #define	sd_scsi_get_target_lun_count	ssd_scsi_get_target_lun_count
886 #define	sd_scsi_update_lun_on_target	ssd_scsi_update_lun_on_target
887 #define	sd_spin_up_unit			ssd_spin_up_unit
888 #define	sd_enable_descr_sense		ssd_enable_descr_sense
889 #define	sd_reenable_dsense_task		ssd_reenable_dsense_task
890 #define	sd_set_mmc_caps			ssd_set_mmc_caps
891 #define	sd_read_unit_properties		ssd_read_unit_properties
892 #define	sd_process_sdconf_file		ssd_process_sdconf_file
893 #define	sd_process_sdconf_table		ssd_process_sdconf_table
894 #define	sd_sdconf_id_match		ssd_sdconf_id_match
895 #define	sd_blank_cmp			ssd_blank_cmp
896 #define	sd_chk_vers1_data		ssd_chk_vers1_data
897 #define	sd_set_vers1_properties		ssd_set_vers1_properties
898 #define	sd_check_solid_state		ssd_check_solid_state
899 #define	sd_check_emulation_mode		ssd_check_emulation_mode
900 
901 #define	sd_get_physical_geometry	ssd_get_physical_geometry
902 #define	sd_get_virtual_geometry		ssd_get_virtual_geometry
903 #define	sd_update_block_info		ssd_update_block_info
904 #define	sd_register_devid		ssd_register_devid
905 #define	sd_get_devid			ssd_get_devid
906 #define	sd_create_devid			ssd_create_devid
907 #define	sd_write_deviceid		ssd_write_deviceid
908 #define	sd_check_vpd_page_support	ssd_check_vpd_page_support
909 #define	sd_setup_pm			ssd_setup_pm
910 #define	sd_create_pm_components		ssd_create_pm_components
911 #define	sd_ddi_suspend			ssd_ddi_suspend
912 #define	sd_ddi_resume			ssd_ddi_resume
913 #define	sd_pm_state_change		ssd_pm_state_change
914 #define	sdpower				ssdpower
915 #define	sdattach			ssdattach
916 #define	sddetach			ssddetach
917 #define	sd_unit_attach			ssd_unit_attach
918 #define	sd_unit_detach			ssd_unit_detach
919 #define	sd_set_unit_attributes		ssd_set_unit_attributes
920 #define	sd_create_errstats		ssd_create_errstats
921 #define	sd_set_errstats			ssd_set_errstats
922 #define	sd_set_pstats			ssd_set_pstats
923 #define	sddump				ssddump
924 #define	sd_scsi_poll			ssd_scsi_poll
925 #define	sd_send_polled_RQS		ssd_send_polled_RQS
926 #define	sd_ddi_scsi_poll		ssd_ddi_scsi_poll
927 #define	sd_init_event_callbacks		ssd_init_event_callbacks
928 #define	sd_event_callback		ssd_event_callback
929 #define	sd_cache_control		ssd_cache_control
930 #define	sd_get_write_cache_enabled	ssd_get_write_cache_enabled
931 #define	sd_get_write_cache_changeable	ssd_get_write_cache_changeable
932 #define	sd_get_nv_sup			ssd_get_nv_sup
933 #define	sd_make_device			ssd_make_device
934 #define	sdopen				ssdopen
935 #define	sdclose				ssdclose
936 #define	sd_ready_and_valid		ssd_ready_and_valid
937 #define	sdmin				ssdmin
938 #define	sdread				ssdread
939 #define	sdwrite				ssdwrite
940 #define	sdaread				ssdaread
941 #define	sdawrite			ssdawrite
942 #define	sdstrategy			ssdstrategy
943 #define	sdioctl				ssdioctl
944 #define	sd_mapblockaddr_iostart		ssd_mapblockaddr_iostart
945 #define	sd_mapblocksize_iostart		ssd_mapblocksize_iostart
946 #define	sd_checksum_iostart		ssd_checksum_iostart
947 #define	sd_checksum_uscsi_iostart	ssd_checksum_uscsi_iostart
948 #define	sd_pm_iostart			ssd_pm_iostart
949 #define	sd_core_iostart			ssd_core_iostart
950 #define	sd_mapblockaddr_iodone		ssd_mapblockaddr_iodone
951 #define	sd_mapblocksize_iodone		ssd_mapblocksize_iodone
952 #define	sd_checksum_iodone		ssd_checksum_iodone
953 #define	sd_checksum_uscsi_iodone	ssd_checksum_uscsi_iodone
954 #define	sd_pm_iodone			ssd_pm_iodone
955 #define	sd_initpkt_for_buf		ssd_initpkt_for_buf
956 #define	sd_destroypkt_for_buf		ssd_destroypkt_for_buf
957 #define	sd_setup_rw_pkt			ssd_setup_rw_pkt
958 #define	sd_setup_next_rw_pkt		ssd_setup_next_rw_pkt
959 #define	sd_buf_iodone			ssd_buf_iodone
960 #define	sd_uscsi_strategy		ssd_uscsi_strategy
961 #define	sd_initpkt_for_uscsi		ssd_initpkt_for_uscsi
962 #define	sd_destroypkt_for_uscsi		ssd_destroypkt_for_uscsi
963 #define	sd_uscsi_iodone			ssd_uscsi_iodone
964 #define	sd_xbuf_strategy		ssd_xbuf_strategy
965 #define	sd_xbuf_init			ssd_xbuf_init
966 #define	sd_pm_entry			ssd_pm_entry
967 #define	sd_pm_exit			ssd_pm_exit
968 
969 #define	sd_pm_idletimeout_handler	ssd_pm_idletimeout_handler
970 #define	sd_pm_timeout_handler		ssd_pm_timeout_handler
971 
972 #define	sd_add_buf_to_waitq		ssd_add_buf_to_waitq
973 #define	sdintr				ssdintr
974 #define	sd_start_cmds			ssd_start_cmds
975 #define	sd_send_scsi_cmd		ssd_send_scsi_cmd
976 #define	sd_bioclone_alloc		ssd_bioclone_alloc
977 #define	sd_bioclone_free		ssd_bioclone_free
978 #define	sd_shadow_buf_alloc		ssd_shadow_buf_alloc
979 #define	sd_shadow_buf_free		ssd_shadow_buf_free
980 #define	sd_print_transport_rejected_message	\
981 					ssd_print_transport_rejected_message
982 #define	sd_retry_command		ssd_retry_command
983 #define	sd_set_retry_bp			ssd_set_retry_bp
984 #define	sd_send_request_sense_command	ssd_send_request_sense_command
985 #define	sd_start_retry_command		ssd_start_retry_command
986 #define	sd_start_direct_priority_command	\
987 					ssd_start_direct_priority_command
988 #define	sd_return_failed_command	ssd_return_failed_command
989 #define	sd_return_failed_command_no_restart	\
990 					ssd_return_failed_command_no_restart
991 #define	sd_return_command		ssd_return_command
992 #define	sd_sync_with_callback		ssd_sync_with_callback
993 #define	sdrunout			ssdrunout
994 #define	sd_mark_rqs_busy		ssd_mark_rqs_busy
995 #define	sd_mark_rqs_idle		ssd_mark_rqs_idle
996 #define	sd_reduce_throttle		ssd_reduce_throttle
997 #define	sd_restore_throttle		ssd_restore_throttle
998 #define	sd_print_incomplete_msg		ssd_print_incomplete_msg
999 #define	sd_init_cdb_limits		ssd_init_cdb_limits
1000 #define	sd_pkt_status_good		ssd_pkt_status_good
1001 #define	sd_pkt_status_check_condition	ssd_pkt_status_check_condition
1002 #define	sd_pkt_status_busy		ssd_pkt_status_busy
1003 #define	sd_pkt_status_reservation_conflict	\
1004 					ssd_pkt_status_reservation_conflict
1005 #define	sd_pkt_status_qfull		ssd_pkt_status_qfull
1006 #define	sd_handle_request_sense		ssd_handle_request_sense
1007 #define	sd_handle_auto_request_sense	ssd_handle_auto_request_sense
1008 #define	sd_print_sense_failed_msg	ssd_print_sense_failed_msg
1009 #define	sd_validate_sense_data		ssd_validate_sense_data
1010 #define	sd_decode_sense			ssd_decode_sense
1011 #define	sd_print_sense_msg		ssd_print_sense_msg
1012 #define	sd_sense_key_no_sense		ssd_sense_key_no_sense
1013 #define	sd_sense_key_recoverable_error	ssd_sense_key_recoverable_error
1014 #define	sd_sense_key_not_ready		ssd_sense_key_not_ready
1015 #define	sd_sense_key_medium_or_hardware_error	\
1016 					ssd_sense_key_medium_or_hardware_error
1017 #define	sd_sense_key_illegal_request	ssd_sense_key_illegal_request
1018 #define	sd_sense_key_unit_attention	ssd_sense_key_unit_attention
1019 #define	sd_sense_key_fail_command	ssd_sense_key_fail_command
1020 #define	sd_sense_key_blank_check	ssd_sense_key_blank_check
1021 #define	sd_sense_key_aborted_command	ssd_sense_key_aborted_command
1022 #define	sd_sense_key_default		ssd_sense_key_default
1023 #define	sd_print_retry_msg		ssd_print_retry_msg
1024 #define	sd_print_cmd_incomplete_msg	ssd_print_cmd_incomplete_msg
1025 #define	sd_pkt_reason_cmd_incomplete	ssd_pkt_reason_cmd_incomplete
1026 #define	sd_pkt_reason_cmd_tran_err	ssd_pkt_reason_cmd_tran_err
1027 #define	sd_pkt_reason_cmd_reset		ssd_pkt_reason_cmd_reset
1028 #define	sd_pkt_reason_cmd_aborted	ssd_pkt_reason_cmd_aborted
1029 #define	sd_pkt_reason_cmd_timeout	ssd_pkt_reason_cmd_timeout
1030 #define	sd_pkt_reason_cmd_unx_bus_free	ssd_pkt_reason_cmd_unx_bus_free
1031 #define	sd_pkt_reason_cmd_tag_reject	ssd_pkt_reason_cmd_tag_reject
1032 #define	sd_pkt_reason_default		ssd_pkt_reason_default
1033 #define	sd_reset_target			ssd_reset_target
1034 #define	sd_start_stop_unit_callback	ssd_start_stop_unit_callback
1035 #define	sd_start_stop_unit_task		ssd_start_stop_unit_task
1036 #define	sd_taskq_create			ssd_taskq_create
1037 #define	sd_taskq_delete			ssd_taskq_delete
1038 #define	sd_target_change_task		ssd_target_change_task
1039 #define	sd_log_dev_status_event		ssd_log_dev_status_event
1040 #define	sd_log_lun_expansion_event	ssd_log_lun_expansion_event
1041 #define	sd_log_eject_request_event	ssd_log_eject_request_event
1042 #define	sd_media_change_task		ssd_media_change_task
1043 #define	sd_handle_mchange		ssd_handle_mchange
1044 #define	sd_send_scsi_DOORLOCK		ssd_send_scsi_DOORLOCK
1045 #define	sd_send_scsi_READ_CAPACITY	ssd_send_scsi_READ_CAPACITY
1046 #define	sd_send_scsi_READ_CAPACITY_16	ssd_send_scsi_READ_CAPACITY_16
1047 #define	sd_send_scsi_GET_CONFIGURATION	ssd_send_scsi_GET_CONFIGURATION
1048 #define	sd_send_scsi_feature_GET_CONFIGURATION	\
1049 					sd_send_scsi_feature_GET_CONFIGURATION
1050 #define	sd_send_scsi_START_STOP_UNIT	ssd_send_scsi_START_STOP_UNIT
1051 #define	sd_send_scsi_INQUIRY		ssd_send_scsi_INQUIRY
1052 #define	sd_send_scsi_TEST_UNIT_READY	ssd_send_scsi_TEST_UNIT_READY
1053 #define	sd_send_scsi_PERSISTENT_RESERVE_IN	\
1054 					ssd_send_scsi_PERSISTENT_RESERVE_IN
1055 #define	sd_send_scsi_PERSISTENT_RESERVE_OUT	\
1056 					ssd_send_scsi_PERSISTENT_RESERVE_OUT
1057 #define	sd_send_scsi_SYNCHRONIZE_CACHE	ssd_send_scsi_SYNCHRONIZE_CACHE
1058 #define	sd_send_scsi_SYNCHRONIZE_CACHE_biodone	\
1059 					ssd_send_scsi_SYNCHRONIZE_CACHE_biodone
1060 #define	sd_send_scsi_MODE_SENSE		ssd_send_scsi_MODE_SENSE
1061 #define	sd_send_scsi_MODE_SELECT	ssd_send_scsi_MODE_SELECT
1062 #define	sd_send_scsi_RDWR		ssd_send_scsi_RDWR
1063 #define	sd_send_scsi_LOG_SENSE		ssd_send_scsi_LOG_SENSE
1064 #define	sd_send_scsi_GET_EVENT_STATUS_NOTIFICATION	\
1065 				ssd_send_scsi_GET_EVENT_STATUS_NOTIFICATION
1066 #define	sd_gesn_media_data_valid	ssd_gesn_media_data_valid
1067 #define	sd_alloc_rqs			ssd_alloc_rqs
1068 #define	sd_free_rqs			ssd_free_rqs
1069 #define	sd_dump_memory			ssd_dump_memory
1070 #define	sd_get_media_info_com		ssd_get_media_info_com
1071 #define	sd_get_media_info		ssd_get_media_info
1072 #define	sd_get_media_info_ext		ssd_get_media_info_ext
1073 #define	sd_dkio_ctrl_info		ssd_dkio_ctrl_info
1074 #define	sd_nvpair_str_decode		ssd_nvpair_str_decode
1075 #define	sd_strtok_r			ssd_strtok_r
1076 #define	sd_set_properties		ssd_set_properties
1077 #define	sd_get_tunables_from_conf	ssd_get_tunables_from_conf
1078 #define	sd_setup_next_xfer		ssd_setup_next_xfer
1079 #define	sd_dkio_get_temp		ssd_dkio_get_temp
1080 #define	sd_check_mhd			ssd_check_mhd
1081 #define	sd_mhd_watch_cb			ssd_mhd_watch_cb
1082 #define	sd_mhd_watch_incomplete		ssd_mhd_watch_incomplete
1083 #define	sd_sname			ssd_sname
1084 #define	sd_mhd_resvd_recover		ssd_mhd_resvd_recover
1085 #define	sd_resv_reclaim_thread		ssd_resv_reclaim_thread
1086 #define	sd_take_ownership		ssd_take_ownership
1087 #define	sd_reserve_release		ssd_reserve_release
1088 #define	sd_rmv_resv_reclaim_req		ssd_rmv_resv_reclaim_req
1089 #define	sd_mhd_reset_notify_cb		ssd_mhd_reset_notify_cb
1090 #define	sd_persistent_reservation_in_read_keys	\
1091 					ssd_persistent_reservation_in_read_keys
1092 #define	sd_persistent_reservation_in_read_resv	\
1093 					ssd_persistent_reservation_in_read_resv
1094 #define	sd_mhdioc_takeown		ssd_mhdioc_takeown
1095 #define	sd_mhdioc_failfast		ssd_mhdioc_failfast
1096 #define	sd_mhdioc_release		ssd_mhdioc_release
1097 #define	sd_mhdioc_register_devid	ssd_mhdioc_register_devid
1098 #define	sd_mhdioc_inkeys		ssd_mhdioc_inkeys
1099 #define	sd_mhdioc_inresv		ssd_mhdioc_inresv
1100 #define	sr_change_blkmode		ssr_change_blkmode
1101 #define	sr_change_speed			ssr_change_speed
1102 #define	sr_atapi_change_speed		ssr_atapi_change_speed
1103 #define	sr_pause_resume			ssr_pause_resume
1104 #define	sr_play_msf			ssr_play_msf
1105 #define	sr_play_trkind			ssr_play_trkind
1106 #define	sr_read_all_subcodes		ssr_read_all_subcodes
1107 #define	sr_read_subchannel		ssr_read_subchannel
1108 #define	sr_read_tocentry		ssr_read_tocentry
1109 #define	sr_read_tochdr			ssr_read_tochdr
1110 #define	sr_read_cdda			ssr_read_cdda
1111 #define	sr_read_cdxa			ssr_read_cdxa
1112 #define	sr_read_mode1			ssr_read_mode1
1113 #define	sr_read_mode2			ssr_read_mode2
1114 #define	sr_read_cd_mode2		ssr_read_cd_mode2
1115 #define	sr_sector_mode			ssr_sector_mode
1116 #define	sr_eject			ssr_eject
1117 #define	sr_ejected			ssr_ejected
1118 #define	sr_check_wp			ssr_check_wp
1119 #define	sd_watch_request_submit		ssd_watch_request_submit
1120 #define	sd_check_media			ssd_check_media
1121 #define	sd_media_watch_cb		ssd_media_watch_cb
1122 #define	sd_delayed_cv_broadcast		ssd_delayed_cv_broadcast
1123 #define	sr_volume_ctrl			ssr_volume_ctrl
1124 #define	sr_read_sony_session_offset	ssr_read_sony_session_offset
1125 #define	sd_log_page_supported		ssd_log_page_supported
1126 #define	sd_check_for_writable_cd	ssd_check_for_writable_cd
1127 #define	sd_wm_cache_constructor		ssd_wm_cache_constructor
1128 #define	sd_wm_cache_destructor		ssd_wm_cache_destructor
1129 #define	sd_range_lock			ssd_range_lock
1130 #define	sd_get_range			ssd_get_range
1131 #define	sd_free_inlist_wmap		ssd_free_inlist_wmap
1132 #define	sd_range_unlock			ssd_range_unlock
1133 #define	sd_read_modify_write_task	ssd_read_modify_write_task
1134 #define	sddump_do_read_of_rmw		ssddump_do_read_of_rmw
1135 
1136 #define	sd_iostart_chain		ssd_iostart_chain
1137 #define	sd_iodone_chain			ssd_iodone_chain
1138 #define	sd_initpkt_map			ssd_initpkt_map
1139 #define	sd_destroypkt_map		ssd_destroypkt_map
1140 #define	sd_chain_type_map		ssd_chain_type_map
1141 #define	sd_chain_index_map		ssd_chain_index_map
1142 
1143 #define	sd_failfast_flushctl		ssd_failfast_flushctl
1144 #define	sd_failfast_flushq		ssd_failfast_flushq
1145 #define	sd_failfast_flushq_callback	ssd_failfast_flushq_callback
1146 
1147 #define	sd_is_lsi			ssd_is_lsi
1148 #define	sd_tg_rdwr			ssd_tg_rdwr
1149 #define	sd_tg_getinfo			ssd_tg_getinfo
1150 #define	sd_rmw_msg_print_handler	ssd_rmw_msg_print_handler
1151 
1152 #endif	/* #if (defined(__fibre)) */
1153 
1154 
1155 int _init(void);
1156 int _fini(void);
1157 int _info(struct modinfo *modinfop);
1158 
1159 /*PRINTFLIKE3*/
1160 static void sd_log_trace(uint_t comp, struct sd_lun *un, const char *fmt, ...);
1161 /*PRINTFLIKE3*/
1162 static void sd_log_info(uint_t comp, struct sd_lun *un, const char *fmt, ...);
1163 /*PRINTFLIKE3*/
1164 static void sd_log_err(uint_t comp, struct sd_lun *un, const char *fmt, ...);
1165 
1166 static int sdprobe(dev_info_t *devi);
1167 static int sdinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg,
1168     void **result);
1169 static int sd_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op,
1170     int mod_flags, char *name, caddr_t valuep, int *lengthp);
1171 
1172 /*
1173  * Smart probe for parallel scsi
1174  */
1175 static void sd_scsi_probe_cache_init(void);
1176 static void sd_scsi_probe_cache_fini(void);
1177 static void sd_scsi_clear_probe_cache(void);
1178 static int  sd_scsi_probe_with_cache(struct scsi_device *devp, int (*fn)());
1179 
1180 /*
1181  * Attached luns on target for parallel scsi
1182  */
1183 static void sd_scsi_target_lun_init(void);
1184 static void sd_scsi_target_lun_fini(void);
1185 static int  sd_scsi_get_target_lun_count(dev_info_t *dip, int target);
1186 static void sd_scsi_update_lun_on_target(dev_info_t *dip, int target, int flag);
1187 
1188 static int	sd_spin_up_unit(sd_ssc_t *ssc);
1189 
1190 /*
1191  * Using sd_ssc_init to establish sd_ssc_t struct
1192  * Using sd_ssc_send to send uscsi internal command
1193  * Using sd_ssc_fini to free sd_ssc_t struct
1194  */
1195 static sd_ssc_t *sd_ssc_init(struct sd_lun *un);
1196 static int sd_ssc_send(sd_ssc_t *ssc, struct uscsi_cmd *incmd,
1197     int flag, enum uio_seg dataspace, int path_flag);
1198 static void sd_ssc_fini(sd_ssc_t *ssc);
1199 
1200 /*
1201  * Using sd_ssc_assessment to set correct type-of-assessment
1202  * Using sd_ssc_post to post ereport & system log
1203  *       sd_ssc_post will call sd_ssc_print to print system log
1204  *       sd_ssc_post will call sd_ssd_ereport_post to post ereport
1205  */
1206 static void sd_ssc_assessment(sd_ssc_t *ssc,
1207     enum sd_type_assessment tp_assess);
1208 
1209 static void sd_ssc_post(sd_ssc_t *ssc, enum sd_driver_assessment sd_assess);
1210 static void sd_ssc_print(sd_ssc_t *ssc, int sd_severity);
1211 static void sd_ssc_ereport_post(sd_ssc_t *ssc,
1212     enum sd_driver_assessment drv_assess);
1213 
1214 /*
1215  * Using sd_ssc_set_info to mark an un-decodable-data error.
1216  * Using sd_ssc_extract_info to transfer information from internal
1217  *       data structures to sd_ssc_t.
1218  */
1219 static void sd_ssc_set_info(sd_ssc_t *ssc, int ssc_flags, uint_t comp,
1220     const char *fmt, ...);
1221 static void sd_ssc_extract_info(sd_ssc_t *ssc, struct sd_lun *un,
1222     struct scsi_pkt *pktp, struct buf *bp, struct sd_xbuf *xp);
1223 
1224 static int sd_send_scsi_cmd(dev_t dev, struct uscsi_cmd *incmd, int flag,
1225     enum uio_seg dataspace, int path_flag);
1226 
1227 #ifdef _LP64
1228 static void	sd_enable_descr_sense(sd_ssc_t *ssc);
1229 static void	sd_reenable_dsense_task(void *arg);
1230 #endif /* _LP64 */
1231 
1232 static void	sd_set_mmc_caps(sd_ssc_t *ssc);
1233 
1234 static void sd_read_unit_properties(struct sd_lun *un);
1235 static int  sd_process_sdconf_file(struct sd_lun *un);
1236 static void sd_nvpair_str_decode(struct sd_lun *un, char *nvpair_str);
1237 static char *sd_strtok_r(char *string, const char *sepset, char **lasts);
1238 static void sd_set_properties(struct sd_lun *un, char *name, char *value);
1239 static void sd_get_tunables_from_conf(struct sd_lun *un, int flags,
1240     int *data_list, sd_tunables *values);
1241 static void sd_process_sdconf_table(struct sd_lun *un);
1242 static int  sd_sdconf_id_match(struct sd_lun *un, char *id, int idlen);
1243 static int  sd_blank_cmp(struct sd_lun *un, char *id, int idlen);
1244 static int  sd_chk_vers1_data(struct sd_lun *un, int flags, int *prop_list,
1245 	int list_len, char *dataname_ptr);
1246 static void sd_set_vers1_properties(struct sd_lun *un, int flags,
1247     sd_tunables *prop_list);
1248 
1249 static void sd_register_devid(sd_ssc_t *ssc, dev_info_t *devi,
1250     int reservation_flag);
1251 static int  sd_get_devid(sd_ssc_t *ssc);
1252 static ddi_devid_t sd_create_devid(sd_ssc_t *ssc);
1253 static int  sd_write_deviceid(sd_ssc_t *ssc);
1254 static int  sd_get_devid_page(struct sd_lun *un, uchar_t *wwn, int *len);
1255 static int  sd_check_vpd_page_support(sd_ssc_t *ssc);
1256 
1257 static void sd_setup_pm(sd_ssc_t *ssc, dev_info_t *devi);
1258 static void sd_create_pm_components(dev_info_t *devi, struct sd_lun *un);
1259 
1260 static int  sd_ddi_suspend(dev_info_t *devi);
1261 static int  sd_ddi_resume(dev_info_t *devi);
1262 static int  sd_pm_state_change(struct sd_lun *un, int level, int flag);
1263 static int  sdpower(dev_info_t *devi, int component, int level);
1264 
1265 static int  sdattach(dev_info_t *devi, ddi_attach_cmd_t cmd);
1266 static int  sddetach(dev_info_t *devi, ddi_detach_cmd_t cmd);
1267 static int  sd_unit_attach(dev_info_t *devi);
1268 static int  sd_unit_detach(dev_info_t *devi);
1269 
1270 static void sd_set_unit_attributes(struct sd_lun *un, dev_info_t *devi);
1271 static void sd_create_errstats(struct sd_lun *un, int instance);
1272 static void sd_set_errstats(struct sd_lun *un);
1273 static void sd_set_pstats(struct sd_lun *un);
1274 
1275 static int  sddump(dev_t dev, caddr_t addr, daddr_t blkno, int nblk);
1276 static int  sd_scsi_poll(struct sd_lun *un, struct scsi_pkt *pkt);
1277 static int  sd_send_polled_RQS(struct sd_lun *un);
1278 static int  sd_ddi_scsi_poll(struct scsi_pkt *pkt);
1279 
1280 #if (defined(__fibre))
1281 /*
1282  * Event callbacks (photon)
1283  */
1284 static void sd_init_event_callbacks(struct sd_lun *un);
1285 static void  sd_event_callback(dev_info_t *, ddi_eventcookie_t, void *, void *);
1286 #endif
1287 
1288 /*
1289  * Defines for sd_cache_control
1290  */
1291 
1292 #define	SD_CACHE_ENABLE		1
1293 #define	SD_CACHE_DISABLE	0
1294 #define	SD_CACHE_NOCHANGE	-1
1295 
1296 static int   sd_cache_control(sd_ssc_t *ssc, int rcd_flag, int wce_flag);
1297 static int   sd_get_write_cache_enabled(sd_ssc_t *ssc, int *is_enabled);
1298 static void  sd_get_write_cache_changeable(sd_ssc_t *ssc, int *is_changeable);
1299 static void  sd_get_nv_sup(sd_ssc_t *ssc);
1300 static dev_t sd_make_device(dev_info_t *devi);
1301 static void  sd_check_solid_state(sd_ssc_t *ssc);
1302 static void  sd_check_emulation_mode(sd_ssc_t *ssc);
1303 static void  sd_update_block_info(struct sd_lun *un, uint32_t lbasize,
1304 	uint64_t capacity);
1305 
1306 /*
1307  * Driver entry point functions.
1308  */
1309 static int  sdopen(dev_t *dev_p, int flag, int otyp, cred_t *cred_p);
1310 static int  sdclose(dev_t dev, int flag, int otyp, cred_t *cred_p);
1311 static int  sd_ready_and_valid(sd_ssc_t *ssc, int part);
1312 
1313 static void sdmin(struct buf *bp);
1314 static int sdread(dev_t dev, struct uio *uio, cred_t *cred_p);
1315 static int sdwrite(dev_t dev, struct uio *uio, cred_t *cred_p);
1316 static int sdaread(dev_t dev, struct aio_req *aio, cred_t *cred_p);
1317 static int sdawrite(dev_t dev, struct aio_req *aio, cred_t *cred_p);
1318 
1319 static int sdstrategy(struct buf *bp);
1320 static int sdioctl(dev_t, int, intptr_t, int, cred_t *, int *);
1321 
1322 /*
1323  * Function prototypes for layering functions in the iostart chain.
1324  */
1325 static void sd_mapblockaddr_iostart(int index, struct sd_lun *un,
1326 	struct buf *bp);
1327 static void sd_mapblocksize_iostart(int index, struct sd_lun *un,
1328 	struct buf *bp);
1329 static void sd_checksum_iostart(int index, struct sd_lun *un, struct buf *bp);
1330 static void sd_checksum_uscsi_iostart(int index, struct sd_lun *un,
1331 	struct buf *bp);
1332 static void sd_pm_iostart(int index, struct sd_lun *un, struct buf *bp);
1333 static void sd_core_iostart(int index, struct sd_lun *un, struct buf *bp);
1334 
1335 /*
1336  * Function prototypes for layering functions in the iodone chain.
1337  */
1338 static void sd_buf_iodone(int index, struct sd_lun *un, struct buf *bp);
1339 static void sd_uscsi_iodone(int index, struct sd_lun *un, struct buf *bp);
1340 static void sd_mapblockaddr_iodone(int index, struct sd_lun *un,
1341 	struct buf *bp);
1342 static void sd_mapblocksize_iodone(int index, struct sd_lun *un,
1343 	struct buf *bp);
1344 static void sd_checksum_iodone(int index, struct sd_lun *un, struct buf *bp);
1345 static void sd_checksum_uscsi_iodone(int index, struct sd_lun *un,
1346 	struct buf *bp);
1347 static void sd_pm_iodone(int index, struct sd_lun *un, struct buf *bp);
1348 
1349 /*
1350  * Prototypes for functions to support buf(9S) based IO.
1351  */
1352 static void sd_xbuf_strategy(struct buf *bp, ddi_xbuf_t xp, void *arg);
1353 static int sd_initpkt_for_buf(struct buf *, struct scsi_pkt **);
1354 static void sd_destroypkt_for_buf(struct buf *);
1355 static int sd_setup_rw_pkt(struct sd_lun *un, struct scsi_pkt **pktpp,
1356 	struct buf *bp, int flags,
1357 	int (*callback)(caddr_t), caddr_t callback_arg,
1358 	diskaddr_t lba, uint32_t blockcount);
1359 static int sd_setup_next_rw_pkt(struct sd_lun *un, struct scsi_pkt *pktp,
1360 	struct buf *bp, diskaddr_t lba, uint32_t blockcount);
1361 
1362 /*
1363  * Prototypes for functions to support USCSI IO.
1364  */
1365 static int sd_uscsi_strategy(struct buf *bp);
1366 static int sd_initpkt_for_uscsi(struct buf *, struct scsi_pkt **);
1367 static void sd_destroypkt_for_uscsi(struct buf *);
1368 
1369 static void sd_xbuf_init(struct sd_lun *un, struct buf *bp, struct sd_xbuf *xp,
1370 	uchar_t chain_type, void *pktinfop);
1371 
1372 static int  sd_pm_entry(struct sd_lun *un);
1373 static void sd_pm_exit(struct sd_lun *un);
1374 
1375 static void sd_pm_idletimeout_handler(void *arg);
1376 
1377 /*
1378  * sd_core internal functions (used at the sd_core_io layer).
1379  */
1380 static void sd_add_buf_to_waitq(struct sd_lun *un, struct buf *bp);
1381 static void sdintr(struct scsi_pkt *pktp);
1382 static void sd_start_cmds(struct sd_lun *un, struct buf *immed_bp);
1383 
1384 static int sd_send_scsi_cmd(dev_t dev, struct uscsi_cmd *incmd, int flag,
1385 	enum uio_seg dataspace, int path_flag);
1386 
1387 static struct buf *sd_bioclone_alloc(struct buf *bp, size_t datalen,
1388 	daddr_t blkno, int (*func)(struct buf *));
1389 static struct buf *sd_shadow_buf_alloc(struct buf *bp, size_t datalen,
1390 	uint_t bflags, daddr_t blkno, int (*func)(struct buf *));
1391 static void sd_bioclone_free(struct buf *bp);
1392 static void sd_shadow_buf_free(struct buf *bp);
1393 
1394 static void sd_print_transport_rejected_message(struct sd_lun *un,
1395 	struct sd_xbuf *xp, int code);
1396 static void sd_print_incomplete_msg(struct sd_lun *un, struct buf *bp,
1397     void *arg, int code);
1398 static void sd_print_sense_failed_msg(struct sd_lun *un, struct buf *bp,
1399     void *arg, int code);
1400 static void sd_print_cmd_incomplete_msg(struct sd_lun *un, struct buf *bp,
1401     void *arg, int code);
1402 
1403 static void sd_retry_command(struct sd_lun *un, struct buf *bp,
1404 	int retry_check_flag,
1405 	void (*user_funcp)(struct sd_lun *un, struct buf *bp, void *argp,
1406 		int c),
1407 	void *user_arg, int failure_code,  clock_t retry_delay,
1408 	void (*statp)(kstat_io_t *));
1409 
1410 static void sd_set_retry_bp(struct sd_lun *un, struct buf *bp,
1411 	clock_t retry_delay, void (*statp)(kstat_io_t *));
1412 
1413 static void sd_send_request_sense_command(struct sd_lun *un, struct buf *bp,
1414 	struct scsi_pkt *pktp);
1415 static void sd_start_retry_command(void *arg);
1416 static void sd_start_direct_priority_command(void *arg);
1417 static void sd_return_failed_command(struct sd_lun *un, struct buf *bp,
1418 	int errcode);
1419 static void sd_return_failed_command_no_restart(struct sd_lun *un,
1420 	struct buf *bp, int errcode);
1421 static void sd_return_command(struct sd_lun *un, struct buf *bp);
1422 static void sd_sync_with_callback(struct sd_lun *un);
1423 static int sdrunout(caddr_t arg);
1424 
1425 static void sd_mark_rqs_busy(struct sd_lun *un, struct buf *bp);
1426 static struct buf *sd_mark_rqs_idle(struct sd_lun *un, struct sd_xbuf *xp);
1427 
1428 static void sd_reduce_throttle(struct sd_lun *un, int throttle_type);
1429 static void sd_restore_throttle(void *arg);
1430 
1431 static void sd_init_cdb_limits(struct sd_lun *un);
1432 
1433 static void sd_pkt_status_good(struct sd_lun *un, struct buf *bp,
1434 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1435 
1436 /*
1437  * Error handling functions
1438  */
1439 static void sd_pkt_status_check_condition(struct sd_lun *un, struct buf *bp,
1440 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1441 static void sd_pkt_status_busy(struct sd_lun *un, struct buf *bp,
1442 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1443 static void sd_pkt_status_reservation_conflict(struct sd_lun *un,
1444 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1445 static void sd_pkt_status_qfull(struct sd_lun *un, struct buf *bp,
1446 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1447 
1448 static void sd_handle_request_sense(struct sd_lun *un, struct buf *bp,
1449 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1450 static void sd_handle_auto_request_sense(struct sd_lun *un, struct buf *bp,
1451 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1452 static int sd_validate_sense_data(struct sd_lun *un, struct buf *bp,
1453 	struct sd_xbuf *xp, size_t actual_len);
1454 static void sd_decode_sense(struct sd_lun *un, struct buf *bp,
1455 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1456 
1457 static void sd_print_sense_msg(struct sd_lun *un, struct buf *bp,
1458 	void *arg, int code);
1459 
1460 static void sd_sense_key_no_sense(struct sd_lun *un, struct buf *bp,
1461 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1462 static void sd_sense_key_recoverable_error(struct sd_lun *un,
1463 	uint8_t *sense_datap,
1464 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1465 static void sd_sense_key_not_ready(struct sd_lun *un,
1466 	uint8_t *sense_datap,
1467 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1468 static void sd_sense_key_medium_or_hardware_error(struct sd_lun *un,
1469 	uint8_t *sense_datap,
1470 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1471 static void sd_sense_key_illegal_request(struct sd_lun *un, struct buf *bp,
1472 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1473 static void sd_sense_key_unit_attention(struct sd_lun *un,
1474 	uint8_t *sense_datap,
1475 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1476 static void sd_sense_key_fail_command(struct sd_lun *un, struct buf *bp,
1477 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1478 static void sd_sense_key_blank_check(struct sd_lun *un, struct buf *bp,
1479 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1480 static void sd_sense_key_aborted_command(struct sd_lun *un, struct buf *bp,
1481 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1482 static void sd_sense_key_default(struct sd_lun *un,
1483 	uint8_t *sense_datap,
1484 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1485 
1486 static void sd_print_retry_msg(struct sd_lun *un, struct buf *bp,
1487 	void *arg, int flag);
1488 
1489 static void sd_pkt_reason_cmd_incomplete(struct sd_lun *un, struct buf *bp,
1490 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1491 static void sd_pkt_reason_cmd_tran_err(struct sd_lun *un, struct buf *bp,
1492 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1493 static void sd_pkt_reason_cmd_reset(struct sd_lun *un, struct buf *bp,
1494 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1495 static void sd_pkt_reason_cmd_aborted(struct sd_lun *un, struct buf *bp,
1496 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1497 static void sd_pkt_reason_cmd_timeout(struct sd_lun *un, struct buf *bp,
1498 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1499 static void sd_pkt_reason_cmd_unx_bus_free(struct sd_lun *un, struct buf *bp,
1500 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1501 static void sd_pkt_reason_cmd_tag_reject(struct sd_lun *un, struct buf *bp,
1502 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1503 static void sd_pkt_reason_default(struct sd_lun *un, struct buf *bp,
1504 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1505 
1506 static void sd_reset_target(struct sd_lun *un, struct scsi_pkt *pktp);
1507 
1508 static void sd_start_stop_unit_callback(void *arg);
1509 static void sd_start_stop_unit_task(void *arg);
1510 
1511 static void sd_taskq_create(void);
1512 static void sd_taskq_delete(void);
1513 static void sd_target_change_task(void *arg);
1514 static void sd_log_dev_status_event(struct sd_lun *un, char *esc, int km_flag);
1515 static void sd_log_lun_expansion_event(struct sd_lun *un, int km_flag);
1516 static void sd_log_eject_request_event(struct sd_lun *un, int km_flag);
1517 static void sd_media_change_task(void *arg);
1518 
1519 static int sd_handle_mchange(struct sd_lun *un);
1520 static int sd_send_scsi_DOORLOCK(sd_ssc_t *ssc, int flag, int path_flag);
1521 static int sd_send_scsi_READ_CAPACITY(sd_ssc_t *ssc, uint64_t *capp,
1522 	uint32_t *lbap, int path_flag);
1523 static int sd_send_scsi_READ_CAPACITY_16(sd_ssc_t *ssc, uint64_t *capp,
1524 	uint32_t *lbap, uint32_t *psp, int path_flag);
1525 static int sd_send_scsi_START_STOP_UNIT(sd_ssc_t *ssc, int pc_flag,
1526 	int flag, int path_flag);
1527 static int sd_send_scsi_INQUIRY(sd_ssc_t *ssc, uchar_t *bufaddr,
1528 	size_t buflen, uchar_t evpd, uchar_t page_code, size_t *residp);
1529 static int sd_send_scsi_TEST_UNIT_READY(sd_ssc_t *ssc, int flag);
1530 static int sd_send_scsi_PERSISTENT_RESERVE_IN(sd_ssc_t *ssc,
1531 	uchar_t usr_cmd, uint16_t data_len, uchar_t *data_bufp);
1532 static int sd_send_scsi_PERSISTENT_RESERVE_OUT(sd_ssc_t *ssc,
1533 	uchar_t usr_cmd, uchar_t *usr_bufp);
1534 static int sd_send_scsi_SYNCHRONIZE_CACHE(struct sd_lun *un,
1535 	struct dk_callback *dkc);
1536 static int sd_send_scsi_SYNCHRONIZE_CACHE_biodone(struct buf *bp);
1537 static int sd_send_scsi_GET_CONFIGURATION(sd_ssc_t *ssc,
1538 	struct uscsi_cmd *ucmdbuf, uchar_t *rqbuf, uint_t rqbuflen,
1539 	uchar_t *bufaddr, uint_t buflen, int path_flag);
1540 static int sd_send_scsi_feature_GET_CONFIGURATION(sd_ssc_t *ssc,
1541 	struct uscsi_cmd *ucmdbuf, uchar_t *rqbuf, uint_t rqbuflen,
1542 	uchar_t *bufaddr, uint_t buflen, char feature, int path_flag);
1543 static int sd_send_scsi_MODE_SENSE(sd_ssc_t *ssc, int cdbsize,
1544 	uchar_t *bufaddr, size_t buflen, uchar_t page_code, int path_flag);
1545 static int sd_send_scsi_MODE_SELECT(sd_ssc_t *ssc, int cdbsize,
1546 	uchar_t *bufaddr, size_t buflen, uchar_t save_page, int path_flag);
1547 static int sd_send_scsi_RDWR(sd_ssc_t *ssc, uchar_t cmd, void *bufaddr,
1548 	size_t buflen, daddr_t start_block, int path_flag);
1549 #define	sd_send_scsi_READ(ssc, bufaddr, buflen, start_block, path_flag)	\
1550 	sd_send_scsi_RDWR(ssc, SCMD_READ, bufaddr, buflen, start_block, \
1551 	path_flag)
1552 #define	sd_send_scsi_WRITE(ssc, bufaddr, buflen, start_block, path_flag)\
1553 	sd_send_scsi_RDWR(ssc, SCMD_WRITE, bufaddr, buflen, start_block,\
1554 	path_flag)
1555 
1556 static int sd_send_scsi_LOG_SENSE(sd_ssc_t *ssc, uchar_t *bufaddr,
1557 	uint16_t buflen, uchar_t page_code, uchar_t page_control,
1558 	uint16_t param_ptr, int path_flag);
1559 static int sd_send_scsi_GET_EVENT_STATUS_NOTIFICATION(sd_ssc_t *ssc,
1560 	uchar_t *bufaddr, size_t buflen, uchar_t class_req);
1561 static boolean_t sd_gesn_media_data_valid(uchar_t *data);
1562 
1563 static int  sd_alloc_rqs(struct scsi_device *devp, struct sd_lun *un);
1564 static void sd_free_rqs(struct sd_lun *un);
1565 
1566 static void sd_dump_memory(struct sd_lun *un, uint_t comp, char *title,
1567 	uchar_t *data, int len, int fmt);
1568 static void sd_panic_for_res_conflict(struct sd_lun *un);
1569 
1570 /*
1571  * Disk Ioctl Function Prototypes
1572  */
1573 static int sd_get_media_info(dev_t dev, caddr_t arg, int flag);
1574 static int sd_get_media_info_ext(dev_t dev, caddr_t arg, int flag);
1575 static int sd_dkio_ctrl_info(dev_t dev, caddr_t arg, int flag);
1576 static int sd_dkio_get_temp(dev_t dev, caddr_t arg, int flag);
1577 
1578 /*
1579  * Multi-host Ioctl Prototypes
1580  */
1581 static int sd_check_mhd(dev_t dev, int interval);
1582 static int sd_mhd_watch_cb(caddr_t arg, struct scsi_watch_result *resultp);
1583 static void sd_mhd_watch_incomplete(struct sd_lun *un, struct scsi_pkt *pkt);
1584 static char *sd_sname(uchar_t status);
1585 static void sd_mhd_resvd_recover(void *arg);
1586 static void sd_resv_reclaim_thread();
1587 static int sd_take_ownership(dev_t dev, struct mhioctkown *p);
1588 static int sd_reserve_release(dev_t dev, int cmd);
1589 static void sd_rmv_resv_reclaim_req(dev_t dev);
1590 static void sd_mhd_reset_notify_cb(caddr_t arg);
1591 static int sd_persistent_reservation_in_read_keys(struct sd_lun *un,
1592 	mhioc_inkeys_t *usrp, int flag);
1593 static int sd_persistent_reservation_in_read_resv(struct sd_lun *un,
1594 	mhioc_inresvs_t *usrp, int flag);
1595 static int sd_mhdioc_takeown(dev_t dev, caddr_t arg, int flag);
1596 static int sd_mhdioc_failfast(dev_t dev, caddr_t arg, int flag);
1597 static int sd_mhdioc_release(dev_t dev);
1598 static int sd_mhdioc_register_devid(dev_t dev);
1599 static int sd_mhdioc_inkeys(dev_t dev, caddr_t arg, int flag);
1600 static int sd_mhdioc_inresv(dev_t dev, caddr_t arg, int flag);
1601 
1602 /*
1603  * SCSI removable prototypes
1604  */
1605 static int sr_change_blkmode(dev_t dev, int cmd, intptr_t data, int flag);
1606 static int sr_change_speed(dev_t dev, int cmd, intptr_t data, int flag);
1607 static int sr_atapi_change_speed(dev_t dev, int cmd, intptr_t data, int flag);
1608 static int sr_pause_resume(dev_t dev, int mode);
1609 static int sr_play_msf(dev_t dev, caddr_t data, int flag);
1610 static int sr_play_trkind(dev_t dev, caddr_t data, int flag);
1611 static int sr_read_all_subcodes(dev_t dev, caddr_t data, int flag);
1612 static int sr_read_subchannel(dev_t dev, caddr_t data, int flag);
1613 static int sr_read_tocentry(dev_t dev, caddr_t data, int flag);
1614 static int sr_read_tochdr(dev_t dev, caddr_t data, int flag);
1615 static int sr_read_cdda(dev_t dev, caddr_t data, int flag);
1616 static int sr_read_cdxa(dev_t dev, caddr_t data, int flag);
1617 static int sr_read_mode1(dev_t dev, caddr_t data, int flag);
1618 static int sr_read_mode2(dev_t dev, caddr_t data, int flag);
1619 static int sr_read_cd_mode2(dev_t dev, caddr_t data, int flag);
1620 static int sr_sector_mode(dev_t dev, uint32_t blksize);
1621 static int sr_eject(dev_t dev);
1622 static void sr_ejected(register struct sd_lun *un);
1623 static int sr_check_wp(dev_t dev);
1624 static opaque_t sd_watch_request_submit(struct sd_lun *un);
1625 static int sd_check_media(dev_t dev, enum dkio_state state);
1626 static int sd_media_watch_cb(caddr_t arg, struct scsi_watch_result *resultp);
1627 static void sd_delayed_cv_broadcast(void *arg);
1628 static int sr_volume_ctrl(dev_t dev, caddr_t data, int flag);
1629 static int sr_read_sony_session_offset(dev_t dev, caddr_t data, int flag);
1630 
1631 static int sd_log_page_supported(sd_ssc_t *ssc, int log_page);
1632 
1633 /*
1634  * Function Prototype for the non-512 support (DVDRAM, MO etc.) functions.
1635  */
1636 static void sd_check_for_writable_cd(sd_ssc_t *ssc, int path_flag);
1637 static int sd_wm_cache_constructor(void *wm, void *un, int flags);
1638 static void sd_wm_cache_destructor(void *wm, void *un);
1639 static struct sd_w_map *sd_range_lock(struct sd_lun *un, daddr_t startb,
1640 	daddr_t endb, ushort_t typ);
1641 static struct sd_w_map *sd_get_range(struct sd_lun *un, daddr_t startb,
1642 	daddr_t endb);
1643 static void sd_free_inlist_wmap(struct sd_lun *un, struct sd_w_map *wmp);
1644 static void sd_range_unlock(struct sd_lun *un, struct sd_w_map *wm);
1645 static void sd_read_modify_write_task(void * arg);
1646 static int
1647 sddump_do_read_of_rmw(struct sd_lun *un, uint64_t blkno, uint64_t nblk,
1648 	struct buf **bpp);
1649 
1650 
1651 /*
1652  * Function prototypes for failfast support.
1653  */
1654 static void sd_failfast_flushq(struct sd_lun *un);
1655 static int sd_failfast_flushq_callback(struct buf *bp);
1656 
1657 /*
1658  * Function prototypes to check for lsi devices
1659  */
1660 static void sd_is_lsi(struct sd_lun *un);
1661 
1662 /*
1663  * Function prototypes for partial DMA support
1664  */
1665 static int sd_setup_next_xfer(struct sd_lun *un, struct buf *bp,
1666 		struct scsi_pkt *pkt, struct sd_xbuf *xp);
1667 
1668 
1669 /* Function prototypes for cmlb */
1670 static int sd_tg_rdwr(dev_info_t *devi, uchar_t cmd, void *bufaddr,
1671     diskaddr_t start_block, size_t reqlength, void *tg_cookie);
1672 
1673 static int sd_tg_getinfo(dev_info_t *devi, int cmd, void *arg, void *tg_cookie);
1674 
1675 /*
1676  * For printing RMW warning message timely
1677  */
1678 static void sd_rmw_msg_print_handler(void *arg);
1679 
1680 /*
1681  * Constants for failfast support:
1682  *
1683  * SD_FAILFAST_INACTIVE: Instance is currently in a normal state, with NO
1684  * failfast processing being performed.
1685  *
1686  * SD_FAILFAST_ACTIVE: Instance is in the failfast state and is performing
1687  * failfast processing on all bufs with B_FAILFAST set.
1688  */
1689 
1690 #define	SD_FAILFAST_INACTIVE		0
1691 #define	SD_FAILFAST_ACTIVE		1
1692 
1693 /*
1694  * Bitmask to control behavior of buf(9S) flushes when a transition to
1695  * the failfast state occurs. Optional bits include:
1696  *
1697  * SD_FAILFAST_FLUSH_ALL_BUFS: When set, flush ALL bufs including those that
1698  * do NOT have B_FAILFAST set. When clear, only bufs with B_FAILFAST will
1699  * be flushed.
1700  *
1701  * SD_FAILFAST_FLUSH_ALL_QUEUES: When set, flush any/all other queues in the
1702  * driver, in addition to the regular wait queue. This includes the xbuf
1703  * queues. When clear, only the driver's wait queue will be flushed.
1704  */
1705 #define	SD_FAILFAST_FLUSH_ALL_BUFS	0x01
1706 #define	SD_FAILFAST_FLUSH_ALL_QUEUES	0x02
1707 
1708 /*
1709  * The default behavior is to only flush bufs that have B_FAILFAST set, but
1710  * to flush all queues within the driver.
1711  */
1712 static int sd_failfast_flushctl = SD_FAILFAST_FLUSH_ALL_QUEUES;
1713 
1714 
1715 /*
1716  * SD Testing Fault Injection
1717  */
1718 #ifdef SD_FAULT_INJECTION
1719 static void sd_faultinjection_ioctl(int cmd, intptr_t arg, struct sd_lun *un);
1720 static void sd_faultinjection(struct scsi_pkt *pktp);
1721 static void sd_injection_log(char *buf, struct sd_lun *un);
1722 #endif
1723 
1724 /*
1725  * Device driver ops vector
1726  */
1727 static struct cb_ops sd_cb_ops = {
1728 	sdopen,			/* open */
1729 	sdclose,		/* close */
1730 	sdstrategy,		/* strategy */
1731 	nodev,			/* print */
1732 	sddump,			/* dump */
1733 	sdread,			/* read */
1734 	sdwrite,		/* write */
1735 	sdioctl,		/* ioctl */
1736 	nodev,			/* devmap */
1737 	nodev,			/* mmap */
1738 	nodev,			/* segmap */
1739 	nochpoll,		/* poll */
1740 	sd_prop_op,		/* cb_prop_op */
1741 	0,			/* streamtab  */
1742 	D_64BIT | D_MP | D_NEW | D_HOTPLUG, /* Driver compatibility flags */
1743 	CB_REV,			/* cb_rev */
1744 	sdaread, 		/* async I/O read entry point */
1745 	sdawrite		/* async I/O write entry point */
1746 };
1747 
1748 struct dev_ops sd_ops = {
1749 	DEVO_REV,		/* devo_rev, */
1750 	0,			/* refcnt  */
1751 	sdinfo,			/* info */
1752 	nulldev,		/* identify */
1753 	sdprobe,		/* probe */
1754 	sdattach,		/* attach */
1755 	sddetach,		/* detach */
1756 	nodev,			/* reset */
1757 	&sd_cb_ops,		/* driver operations */
1758 	NULL,			/* bus operations */
1759 	sdpower,		/* power */
1760 	ddi_quiesce_not_needed,		/* quiesce */
1761 };
1762 
1763 /*
1764  * This is the loadable module wrapper.
1765  */
1766 #include <sys/modctl.h>
1767 
1768 #ifndef XPV_HVM_DRIVER
1769 static struct modldrv modldrv = {
1770 	&mod_driverops,		/* Type of module. This one is a driver */
1771 	SD_MODULE_NAME,		/* Module name. */
1772 	&sd_ops			/* driver ops */
1773 };
1774 
1775 static struct modlinkage modlinkage = {
1776 	MODREV_1, &modldrv, NULL
1777 };
1778 
1779 #else /* XPV_HVM_DRIVER */
1780 static struct modlmisc modlmisc = {
1781 	&mod_miscops,		/* Type of module. This one is a misc */
1782 	"HVM " SD_MODULE_NAME,		/* Module name. */
1783 };
1784 
1785 static struct modlinkage modlinkage = {
1786 	MODREV_1, &modlmisc, NULL
1787 };
1788 
1789 #endif /* XPV_HVM_DRIVER */
1790 
1791 static cmlb_tg_ops_t sd_tgops = {
1792 	TG_DK_OPS_VERSION_1,
1793 	sd_tg_rdwr,
1794 	sd_tg_getinfo
1795 };
1796 
1797 static struct scsi_asq_key_strings sd_additional_codes[] = {
1798 	0x81, 0, "Logical Unit is Reserved",
1799 	0x85, 0, "Audio Address Not Valid",
1800 	0xb6, 0, "Media Load Mechanism Failed",
1801 	0xB9, 0, "Audio Play Operation Aborted",
1802 	0xbf, 0, "Buffer Overflow for Read All Subcodes Command",
1803 	0x53, 2, "Medium removal prevented",
1804 	0x6f, 0, "Authentication failed during key exchange",
1805 	0x6f, 1, "Key not present",
1806 	0x6f, 2, "Key not established",
1807 	0x6f, 3, "Read without proper authentication",
1808 	0x6f, 4, "Mismatched region to this logical unit",
1809 	0x6f, 5, "Region reset count error",
1810 	0xffff, 0x0, NULL
1811 };
1812 
1813 
1814 /*
1815  * Struct for passing printing information for sense data messages
1816  */
1817 struct sd_sense_info {
1818 	int	ssi_severity;
1819 	int	ssi_pfa_flag;
1820 };
1821 
1822 /*
1823  * Table of function pointers for iostart-side routines. Separate "chains"
1824  * of layered function calls are formed by placing the function pointers
1825  * sequentially in the desired order. Functions are called according to an
1826  * incrementing table index ordering. The last function in each chain must
1827  * be sd_core_iostart(). The corresponding iodone-side routines are expected
1828  * in the sd_iodone_chain[] array.
1829  *
1830  * Note: It may seem more natural to organize both the iostart and iodone
1831  * functions together, into an array of structures (or some similar
1832  * organization) with a common index, rather than two separate arrays which
1833  * must be maintained in synchronization. The purpose of this division is
1834  * to achieve improved performance: individual arrays allows for more
1835  * effective cache line utilization on certain platforms.
1836  */
1837 
1838 typedef void (*sd_chain_t)(int index, struct sd_lun *un, struct buf *bp);
1839 
1840 
1841 static sd_chain_t sd_iostart_chain[] = {
1842 
1843 	/* Chain for buf IO for disk drive targets (PM enabled) */
1844 	sd_mapblockaddr_iostart,	/* Index: 0 */
1845 	sd_pm_iostart,			/* Index: 1 */
1846 	sd_core_iostart,		/* Index: 2 */
1847 
1848 	/* Chain for buf IO for disk drive targets (PM disabled) */
1849 	sd_mapblockaddr_iostart,	/* Index: 3 */
1850 	sd_core_iostart,		/* Index: 4 */
1851 
1852 	/*
1853 	 * Chain for buf IO for removable-media or large sector size
1854 	 * disk drive targets with RMW needed (PM enabled)
1855 	 */
1856 	sd_mapblockaddr_iostart,	/* Index: 5 */
1857 	sd_mapblocksize_iostart,	/* Index: 6 */
1858 	sd_pm_iostart,			/* Index: 7 */
1859 	sd_core_iostart,		/* Index: 8 */
1860 
1861 	/*
1862 	 * Chain for buf IO for removable-media or large sector size
1863 	 * disk drive targets with RMW needed (PM disabled)
1864 	 */
1865 	sd_mapblockaddr_iostart,	/* Index: 9 */
1866 	sd_mapblocksize_iostart,	/* Index: 10 */
1867 	sd_core_iostart,		/* Index: 11 */
1868 
1869 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
1870 	sd_mapblockaddr_iostart,	/* Index: 12 */
1871 	sd_checksum_iostart,		/* Index: 13 */
1872 	sd_pm_iostart,			/* Index: 14 */
1873 	sd_core_iostart,		/* Index: 15 */
1874 
1875 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
1876 	sd_mapblockaddr_iostart,	/* Index: 16 */
1877 	sd_checksum_iostart,		/* Index: 17 */
1878 	sd_core_iostart,		/* Index: 18 */
1879 
1880 	/* Chain for USCSI commands (all targets) */
1881 	sd_pm_iostart,			/* Index: 19 */
1882 	sd_core_iostart,		/* Index: 20 */
1883 
1884 	/* Chain for checksumming USCSI commands (all targets) */
1885 	sd_checksum_uscsi_iostart,	/* Index: 21 */
1886 	sd_pm_iostart,			/* Index: 22 */
1887 	sd_core_iostart,		/* Index: 23 */
1888 
1889 	/* Chain for "direct" USCSI commands (all targets) */
1890 	sd_core_iostart,		/* Index: 24 */
1891 
1892 	/* Chain for "direct priority" USCSI commands (all targets) */
1893 	sd_core_iostart,		/* Index: 25 */
1894 
1895 	/*
1896 	 * Chain for buf IO for large sector size disk drive targets
1897 	 * with RMW needed with checksumming (PM enabled)
1898 	 */
1899 	sd_mapblockaddr_iostart,	/* Index: 26 */
1900 	sd_mapblocksize_iostart,	/* Index: 27 */
1901 	sd_checksum_iostart,		/* Index: 28 */
1902 	sd_pm_iostart,			/* Index: 29 */
1903 	sd_core_iostart,		/* Index: 30 */
1904 
1905 	/*
1906 	 * Chain for buf IO for large sector size disk drive targets
1907 	 * with RMW needed with checksumming (PM disabled)
1908 	 */
1909 	sd_mapblockaddr_iostart,	/* Index: 31 */
1910 	sd_mapblocksize_iostart,	/* Index: 32 */
1911 	sd_checksum_iostart,		/* Index: 33 */
1912 	sd_core_iostart,		/* Index: 34 */
1913 
1914 };
1915 
1916 /*
1917  * Macros to locate the first function of each iostart chain in the
1918  * sd_iostart_chain[] array. These are located by the index in the array.
1919  */
1920 #define	SD_CHAIN_DISK_IOSTART			0
1921 #define	SD_CHAIN_DISK_IOSTART_NO_PM		3
1922 #define	SD_CHAIN_MSS_DISK_IOSTART		5
1923 #define	SD_CHAIN_RMMEDIA_IOSTART		5
1924 #define	SD_CHAIN_MSS_DISK_IOSTART_NO_PM		9
1925 #define	SD_CHAIN_RMMEDIA_IOSTART_NO_PM		9
1926 #define	SD_CHAIN_CHKSUM_IOSTART			12
1927 #define	SD_CHAIN_CHKSUM_IOSTART_NO_PM		16
1928 #define	SD_CHAIN_USCSI_CMD_IOSTART		19
1929 #define	SD_CHAIN_USCSI_CHKSUM_IOSTART		21
1930 #define	SD_CHAIN_DIRECT_CMD_IOSTART		24
1931 #define	SD_CHAIN_PRIORITY_CMD_IOSTART		25
1932 #define	SD_CHAIN_MSS_CHKSUM_IOSTART		26
1933 #define	SD_CHAIN_MSS_CHKSUM_IOSTART_NO_PM	31
1934 
1935 
1936 /*
1937  * Table of function pointers for the iodone-side routines for the driver-
1938  * internal layering mechanism.  The calling sequence for iodone routines
1939  * uses a decrementing table index, so the last routine called in a chain
1940  * must be at the lowest array index location for that chain.  The last
1941  * routine for each chain must be either sd_buf_iodone() (for buf(9S) IOs)
1942  * or sd_uscsi_iodone() (for uscsi IOs).  Other than this, the ordering
1943  * of the functions in an iodone side chain must correspond to the ordering
1944  * of the iostart routines for that chain.  Note that there is no iodone
1945  * side routine that corresponds to sd_core_iostart(), so there is no
1946  * entry in the table for this.
1947  */
1948 
1949 static sd_chain_t sd_iodone_chain[] = {
1950 
1951 	/* Chain for buf IO for disk drive targets (PM enabled) */
1952 	sd_buf_iodone,			/* Index: 0 */
1953 	sd_mapblockaddr_iodone,		/* Index: 1 */
1954 	sd_pm_iodone,			/* Index: 2 */
1955 
1956 	/* Chain for buf IO for disk drive targets (PM disabled) */
1957 	sd_buf_iodone,			/* Index: 3 */
1958 	sd_mapblockaddr_iodone,		/* Index: 4 */
1959 
1960 	/*
1961 	 * Chain for buf IO for removable-media or large sector size
1962 	 * disk drive targets with RMW needed (PM enabled)
1963 	 */
1964 	sd_buf_iodone,			/* Index: 5 */
1965 	sd_mapblockaddr_iodone,		/* Index: 6 */
1966 	sd_mapblocksize_iodone,		/* Index: 7 */
1967 	sd_pm_iodone,			/* Index: 8 */
1968 
1969 	/*
1970 	 * Chain for buf IO for removable-media or large sector size
1971 	 * disk drive targets with RMW needed (PM disabled)
1972 	 */
1973 	sd_buf_iodone,			/* Index: 9 */
1974 	sd_mapblockaddr_iodone,		/* Index: 10 */
1975 	sd_mapblocksize_iodone,		/* Index: 11 */
1976 
1977 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
1978 	sd_buf_iodone,			/* Index: 12 */
1979 	sd_mapblockaddr_iodone,		/* Index: 13 */
1980 	sd_checksum_iodone,		/* Index: 14 */
1981 	sd_pm_iodone,			/* Index: 15 */
1982 
1983 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
1984 	sd_buf_iodone,			/* Index: 16 */
1985 	sd_mapblockaddr_iodone,		/* Index: 17 */
1986 	sd_checksum_iodone,		/* Index: 18 */
1987 
1988 	/* Chain for USCSI commands (non-checksum targets) */
1989 	sd_uscsi_iodone,		/* Index: 19 */
1990 	sd_pm_iodone,			/* Index: 20 */
1991 
1992 	/* Chain for USCSI commands (checksum targets) */
1993 	sd_uscsi_iodone,		/* Index: 21 */
1994 	sd_checksum_uscsi_iodone,	/* Index: 22 */
1995 	sd_pm_iodone,			/* Index: 22 */
1996 
1997 	/* Chain for "direct" USCSI commands (all targets) */
1998 	sd_uscsi_iodone,		/* Index: 24 */
1999 
2000 	/* Chain for "direct priority" USCSI commands (all targets) */
2001 	sd_uscsi_iodone,		/* Index: 25 */
2002 
2003 	/*
2004 	 * Chain for buf IO for large sector size disk drive targets
2005 	 * with checksumming (PM enabled)
2006 	 */
2007 	sd_buf_iodone,			/* Index: 26 */
2008 	sd_mapblockaddr_iodone,		/* Index: 27 */
2009 	sd_mapblocksize_iodone,		/* Index: 28 */
2010 	sd_checksum_iodone,		/* Index: 29 */
2011 	sd_pm_iodone,			/* Index: 30 */
2012 
2013 	/*
2014 	 * Chain for buf IO for large sector size disk drive targets
2015 	 * with checksumming (PM disabled)
2016 	 */
2017 	sd_buf_iodone,			/* Index: 31 */
2018 	sd_mapblockaddr_iodone,		/* Index: 32 */
2019 	sd_mapblocksize_iodone,		/* Index: 33 */
2020 	sd_checksum_iodone,		/* Index: 34 */
2021 };
2022 
2023 
2024 /*
2025  * Macros to locate the "first" function in the sd_iodone_chain[] array for
2026  * each iodone-side chain. These are located by the array index, but as the
2027  * iodone side functions are called in a decrementing-index order, the
2028  * highest index number in each chain must be specified (as these correspond
2029  * to the first function in the iodone chain that will be called by the core
2030  * at IO completion time).
2031  */
2032 
2033 #define	SD_CHAIN_DISK_IODONE			2
2034 #define	SD_CHAIN_DISK_IODONE_NO_PM		4
2035 #define	SD_CHAIN_RMMEDIA_IODONE			8
2036 #define	SD_CHAIN_MSS_DISK_IODONE		8
2037 #define	SD_CHAIN_RMMEDIA_IODONE_NO_PM		11
2038 #define	SD_CHAIN_MSS_DISK_IODONE_NO_PM		11
2039 #define	SD_CHAIN_CHKSUM_IODONE			15
2040 #define	SD_CHAIN_CHKSUM_IODONE_NO_PM		18
2041 #define	SD_CHAIN_USCSI_CMD_IODONE		20
2042 #define	SD_CHAIN_USCSI_CHKSUM_IODONE		22
2043 #define	SD_CHAIN_DIRECT_CMD_IODONE		24
2044 #define	SD_CHAIN_PRIORITY_CMD_IODONE		25
2045 #define	SD_CHAIN_MSS_CHKSUM_IODONE		30
2046 #define	SD_CHAIN_MSS_CHKSUM_IODONE_NO_PM	34
2047 
2048 
2049 
2050 /*
2051  * Array to map a layering chain index to the appropriate initpkt routine.
2052  * The redundant entries are present so that the index used for accessing
2053  * the above sd_iostart_chain and sd_iodone_chain tables can be used directly
2054  * with this table as well.
2055  */
2056 typedef int (*sd_initpkt_t)(struct buf *, struct scsi_pkt **);
2057 
2058 static sd_initpkt_t	sd_initpkt_map[] = {
2059 
2060 	/* Chain for buf IO for disk drive targets (PM enabled) */
2061 	sd_initpkt_for_buf,		/* Index: 0 */
2062 	sd_initpkt_for_buf,		/* Index: 1 */
2063 	sd_initpkt_for_buf,		/* Index: 2 */
2064 
2065 	/* Chain for buf IO for disk drive targets (PM disabled) */
2066 	sd_initpkt_for_buf,		/* Index: 3 */
2067 	sd_initpkt_for_buf,		/* Index: 4 */
2068 
2069 	/*
2070 	 * Chain for buf IO for removable-media or large sector size
2071 	 * disk drive targets (PM enabled)
2072 	 */
2073 	sd_initpkt_for_buf,		/* Index: 5 */
2074 	sd_initpkt_for_buf,		/* Index: 6 */
2075 	sd_initpkt_for_buf,		/* Index: 7 */
2076 	sd_initpkt_for_buf,		/* Index: 8 */
2077 
2078 	/*
2079 	 * Chain for buf IO for removable-media or large sector size
2080 	 * disk drive targets (PM disabled)
2081 	 */
2082 	sd_initpkt_for_buf,		/* Index: 9 */
2083 	sd_initpkt_for_buf,		/* Index: 10 */
2084 	sd_initpkt_for_buf,		/* Index: 11 */
2085 
2086 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
2087 	sd_initpkt_for_buf,		/* Index: 12 */
2088 	sd_initpkt_for_buf,		/* Index: 13 */
2089 	sd_initpkt_for_buf,		/* Index: 14 */
2090 	sd_initpkt_for_buf,		/* Index: 15 */
2091 
2092 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
2093 	sd_initpkt_for_buf,		/* Index: 16 */
2094 	sd_initpkt_for_buf,		/* Index: 17 */
2095 	sd_initpkt_for_buf,		/* Index: 18 */
2096 
2097 	/* Chain for USCSI commands (non-checksum targets) */
2098 	sd_initpkt_for_uscsi,		/* Index: 19 */
2099 	sd_initpkt_for_uscsi,		/* Index: 20 */
2100 
2101 	/* Chain for USCSI commands (checksum targets) */
2102 	sd_initpkt_for_uscsi,		/* Index: 21 */
2103 	sd_initpkt_for_uscsi,		/* Index: 22 */
2104 	sd_initpkt_for_uscsi,		/* Index: 22 */
2105 
2106 	/* Chain for "direct" USCSI commands (all targets) */
2107 	sd_initpkt_for_uscsi,		/* Index: 24 */
2108 
2109 	/* Chain for "direct priority" USCSI commands (all targets) */
2110 	sd_initpkt_for_uscsi,		/* Index: 25 */
2111 
2112 	/*
2113 	 * Chain for buf IO for large sector size disk drive targets
2114 	 * with checksumming (PM enabled)
2115 	 */
2116 	sd_initpkt_for_buf,		/* Index: 26 */
2117 	sd_initpkt_for_buf,		/* Index: 27 */
2118 	sd_initpkt_for_buf,		/* Index: 28 */
2119 	sd_initpkt_for_buf,		/* Index: 29 */
2120 	sd_initpkt_for_buf,		/* Index: 30 */
2121 
2122 	/*
2123 	 * Chain for buf IO for large sector size disk drive targets
2124 	 * with checksumming (PM disabled)
2125 	 */
2126 	sd_initpkt_for_buf,		/* Index: 31 */
2127 	sd_initpkt_for_buf,		/* Index: 32 */
2128 	sd_initpkt_for_buf,		/* Index: 33 */
2129 	sd_initpkt_for_buf,		/* Index: 34 */
2130 };
2131 
2132 
2133 /*
2134  * Array to map a layering chain index to the appropriate destroypktpkt routine.
2135  * The redundant entries are present so that the index used for accessing
2136  * the above sd_iostart_chain and sd_iodone_chain tables can be used directly
2137  * with this table as well.
2138  */
2139 typedef void (*sd_destroypkt_t)(struct buf *);
2140 
2141 static sd_destroypkt_t	sd_destroypkt_map[] = {
2142 
2143 	/* Chain for buf IO for disk drive targets (PM enabled) */
2144 	sd_destroypkt_for_buf,		/* Index: 0 */
2145 	sd_destroypkt_for_buf,		/* Index: 1 */
2146 	sd_destroypkt_for_buf,		/* Index: 2 */
2147 
2148 	/* Chain for buf IO for disk drive targets (PM disabled) */
2149 	sd_destroypkt_for_buf,		/* Index: 3 */
2150 	sd_destroypkt_for_buf,		/* Index: 4 */
2151 
2152 	/*
2153 	 * Chain for buf IO for removable-media or large sector size
2154 	 * disk drive targets (PM enabled)
2155 	 */
2156 	sd_destroypkt_for_buf,		/* Index: 5 */
2157 	sd_destroypkt_for_buf,		/* Index: 6 */
2158 	sd_destroypkt_for_buf,		/* Index: 7 */
2159 	sd_destroypkt_for_buf,		/* Index: 8 */
2160 
2161 	/*
2162 	 * Chain for buf IO for removable-media or large sector size
2163 	 * disk drive targets (PM disabled)
2164 	 */
2165 	sd_destroypkt_for_buf,		/* Index: 9 */
2166 	sd_destroypkt_for_buf,		/* Index: 10 */
2167 	sd_destroypkt_for_buf,		/* Index: 11 */
2168 
2169 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
2170 	sd_destroypkt_for_buf,		/* Index: 12 */
2171 	sd_destroypkt_for_buf,		/* Index: 13 */
2172 	sd_destroypkt_for_buf,		/* Index: 14 */
2173 	sd_destroypkt_for_buf,		/* Index: 15 */
2174 
2175 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
2176 	sd_destroypkt_for_buf,		/* Index: 16 */
2177 	sd_destroypkt_for_buf,		/* Index: 17 */
2178 	sd_destroypkt_for_buf,		/* Index: 18 */
2179 
2180 	/* Chain for USCSI commands (non-checksum targets) */
2181 	sd_destroypkt_for_uscsi,	/* Index: 19 */
2182 	sd_destroypkt_for_uscsi,	/* Index: 20 */
2183 
2184 	/* Chain for USCSI commands (checksum targets) */
2185 	sd_destroypkt_for_uscsi,	/* Index: 21 */
2186 	sd_destroypkt_for_uscsi,	/* Index: 22 */
2187 	sd_destroypkt_for_uscsi,	/* Index: 22 */
2188 
2189 	/* Chain for "direct" USCSI commands (all targets) */
2190 	sd_destroypkt_for_uscsi,	/* Index: 24 */
2191 
2192 	/* Chain for "direct priority" USCSI commands (all targets) */
2193 	sd_destroypkt_for_uscsi,	/* Index: 25 */
2194 
2195 	/*
2196 	 * Chain for buf IO for large sector size disk drive targets
2197 	 * with checksumming (PM disabled)
2198 	 */
2199 	sd_destroypkt_for_buf,		/* Index: 26 */
2200 	sd_destroypkt_for_buf,		/* Index: 27 */
2201 	sd_destroypkt_for_buf,		/* Index: 28 */
2202 	sd_destroypkt_for_buf,		/* Index: 29 */
2203 	sd_destroypkt_for_buf,		/* Index: 30 */
2204 
2205 	/*
2206 	 * Chain for buf IO for large sector size disk drive targets
2207 	 * with checksumming (PM enabled)
2208 	 */
2209 	sd_destroypkt_for_buf,		/* Index: 31 */
2210 	sd_destroypkt_for_buf,		/* Index: 32 */
2211 	sd_destroypkt_for_buf,		/* Index: 33 */
2212 	sd_destroypkt_for_buf,		/* Index: 34 */
2213 };
2214 
2215 
2216 
2217 /*
2218  * Array to map a layering chain index to the appropriate chain "type".
2219  * The chain type indicates a specific property/usage of the chain.
2220  * The redundant entries are present so that the index used for accessing
2221  * the above sd_iostart_chain and sd_iodone_chain tables can be used directly
2222  * with this table as well.
2223  */
2224 
2225 #define	SD_CHAIN_NULL			0	/* for the special RQS cmd */
2226 #define	SD_CHAIN_BUFIO			1	/* regular buf IO */
2227 #define	SD_CHAIN_USCSI			2	/* regular USCSI commands */
2228 #define	SD_CHAIN_DIRECT			3	/* uscsi, w/ bypass power mgt */
2229 #define	SD_CHAIN_DIRECT_PRIORITY	4	/* uscsi, w/ bypass power mgt */
2230 						/* (for error recovery) */
2231 
2232 static int sd_chain_type_map[] = {
2233 
2234 	/* Chain for buf IO for disk drive targets (PM enabled) */
2235 	SD_CHAIN_BUFIO,			/* Index: 0 */
2236 	SD_CHAIN_BUFIO,			/* Index: 1 */
2237 	SD_CHAIN_BUFIO,			/* Index: 2 */
2238 
2239 	/* Chain for buf IO for disk drive targets (PM disabled) */
2240 	SD_CHAIN_BUFIO,			/* Index: 3 */
2241 	SD_CHAIN_BUFIO,			/* Index: 4 */
2242 
2243 	/*
2244 	 * Chain for buf IO for removable-media or large sector size
2245 	 * disk drive targets (PM enabled)
2246 	 */
2247 	SD_CHAIN_BUFIO,			/* Index: 5 */
2248 	SD_CHAIN_BUFIO,			/* Index: 6 */
2249 	SD_CHAIN_BUFIO,			/* Index: 7 */
2250 	SD_CHAIN_BUFIO,			/* Index: 8 */
2251 
2252 	/*
2253 	 * Chain for buf IO for removable-media or large sector size
2254 	 * disk drive targets (PM disabled)
2255 	 */
2256 	SD_CHAIN_BUFIO,			/* Index: 9 */
2257 	SD_CHAIN_BUFIO,			/* Index: 10 */
2258 	SD_CHAIN_BUFIO,			/* Index: 11 */
2259 
2260 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
2261 	SD_CHAIN_BUFIO,			/* Index: 12 */
2262 	SD_CHAIN_BUFIO,			/* Index: 13 */
2263 	SD_CHAIN_BUFIO,			/* Index: 14 */
2264 	SD_CHAIN_BUFIO,			/* Index: 15 */
2265 
2266 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
2267 	SD_CHAIN_BUFIO,			/* Index: 16 */
2268 	SD_CHAIN_BUFIO,			/* Index: 17 */
2269 	SD_CHAIN_BUFIO,			/* Index: 18 */
2270 
2271 	/* Chain for USCSI commands (non-checksum targets) */
2272 	SD_CHAIN_USCSI,			/* Index: 19 */
2273 	SD_CHAIN_USCSI,			/* Index: 20 */
2274 
2275 	/* Chain for USCSI commands (checksum targets) */
2276 	SD_CHAIN_USCSI,			/* Index: 21 */
2277 	SD_CHAIN_USCSI,			/* Index: 22 */
2278 	SD_CHAIN_USCSI,			/* Index: 23 */
2279 
2280 	/* Chain for "direct" USCSI commands (all targets) */
2281 	SD_CHAIN_DIRECT,		/* Index: 24 */
2282 
2283 	/* Chain for "direct priority" USCSI commands (all targets) */
2284 	SD_CHAIN_DIRECT_PRIORITY,	/* Index: 25 */
2285 
2286 	/*
2287 	 * Chain for buf IO for large sector size disk drive targets
2288 	 * with checksumming (PM enabled)
2289 	 */
2290 	SD_CHAIN_BUFIO,			/* Index: 26 */
2291 	SD_CHAIN_BUFIO,			/* Index: 27 */
2292 	SD_CHAIN_BUFIO,			/* Index: 28 */
2293 	SD_CHAIN_BUFIO,			/* Index: 29 */
2294 	SD_CHAIN_BUFIO,			/* Index: 30 */
2295 
2296 	/*
2297 	 * Chain for buf IO for large sector size disk drive targets
2298 	 * with checksumming (PM disabled)
2299 	 */
2300 	SD_CHAIN_BUFIO,			/* Index: 31 */
2301 	SD_CHAIN_BUFIO,			/* Index: 32 */
2302 	SD_CHAIN_BUFIO,			/* Index: 33 */
2303 	SD_CHAIN_BUFIO,			/* Index: 34 */
2304 };
2305 
2306 
2307 /* Macro to return TRUE if the IO has come from the sd_buf_iostart() chain. */
2308 #define	SD_IS_BUFIO(xp)			\
2309 	(sd_chain_type_map[(xp)->xb_chain_iostart] == SD_CHAIN_BUFIO)
2310 
2311 /* Macro to return TRUE if the IO has come from the "direct priority" chain. */
2312 #define	SD_IS_DIRECT_PRIORITY(xp)	\
2313 	(sd_chain_type_map[(xp)->xb_chain_iostart] == SD_CHAIN_DIRECT_PRIORITY)
2314 
2315 
2316 
2317 /*
2318  * Struct, array, and macros to map a specific chain to the appropriate
2319  * layering indexes in the sd_iostart_chain[] and sd_iodone_chain[] arrays.
2320  *
2321  * The sd_chain_index_map[] array is used at attach time to set the various
2322  * un_xxx_chain type members of the sd_lun softstate to the specific layering
2323  * chain to be used with the instance. This allows different instances to use
2324  * different chain for buf IO, uscsi IO, etc.. Also, since the xb_chain_iostart
2325  * and xb_chain_iodone index values in the sd_xbuf are initialized to these
2326  * values at sd_xbuf init time, this allows (1) layering chains may be changed
2327  * dynamically & without the use of locking; and (2) a layer may update the
2328  * xb_chain_io[start|done] member in a given xbuf with its current index value,
2329  * to allow for deferred processing of an IO within the same chain from a
2330  * different execution context.
2331  */
2332 
2333 struct sd_chain_index {
2334 	int	sci_iostart_index;
2335 	int	sci_iodone_index;
2336 };
2337 
2338 static struct sd_chain_index	sd_chain_index_map[] = {
2339 	{ SD_CHAIN_DISK_IOSTART,		SD_CHAIN_DISK_IODONE },
2340 	{ SD_CHAIN_DISK_IOSTART_NO_PM,		SD_CHAIN_DISK_IODONE_NO_PM },
2341 	{ SD_CHAIN_RMMEDIA_IOSTART,		SD_CHAIN_RMMEDIA_IODONE },
2342 	{ SD_CHAIN_RMMEDIA_IOSTART_NO_PM,	SD_CHAIN_RMMEDIA_IODONE_NO_PM },
2343 	{ SD_CHAIN_CHKSUM_IOSTART,		SD_CHAIN_CHKSUM_IODONE },
2344 	{ SD_CHAIN_CHKSUM_IOSTART_NO_PM,	SD_CHAIN_CHKSUM_IODONE_NO_PM },
2345 	{ SD_CHAIN_USCSI_CMD_IOSTART,		SD_CHAIN_USCSI_CMD_IODONE },
2346 	{ SD_CHAIN_USCSI_CHKSUM_IOSTART,	SD_CHAIN_USCSI_CHKSUM_IODONE },
2347 	{ SD_CHAIN_DIRECT_CMD_IOSTART,		SD_CHAIN_DIRECT_CMD_IODONE },
2348 	{ SD_CHAIN_PRIORITY_CMD_IOSTART,	SD_CHAIN_PRIORITY_CMD_IODONE },
2349 	{ SD_CHAIN_MSS_CHKSUM_IOSTART,		SD_CHAIN_MSS_CHKSUM_IODONE },
2350 	{ SD_CHAIN_MSS_CHKSUM_IOSTART_NO_PM, SD_CHAIN_MSS_CHKSUM_IODONE_NO_PM },
2351 
2352 };
2353 
2354 
2355 /*
2356  * The following are indexes into the sd_chain_index_map[] array.
2357  */
2358 
2359 /* un->un_buf_chain_type must be set to one of these */
2360 #define	SD_CHAIN_INFO_DISK		0
2361 #define	SD_CHAIN_INFO_DISK_NO_PM	1
2362 #define	SD_CHAIN_INFO_RMMEDIA		2
2363 #define	SD_CHAIN_INFO_MSS_DISK		2
2364 #define	SD_CHAIN_INFO_RMMEDIA_NO_PM	3
2365 #define	SD_CHAIN_INFO_MSS_DSK_NO_PM	3
2366 #define	SD_CHAIN_INFO_CHKSUM		4
2367 #define	SD_CHAIN_INFO_CHKSUM_NO_PM	5
2368 #define	SD_CHAIN_INFO_MSS_DISK_CHKSUM	10
2369 #define	SD_CHAIN_INFO_MSS_DISK_CHKSUM_NO_PM	11
2370 
2371 /* un->un_uscsi_chain_type must be set to one of these */
2372 #define	SD_CHAIN_INFO_USCSI_CMD		6
2373 /* USCSI with PM disabled is the same as DIRECT */
2374 #define	SD_CHAIN_INFO_USCSI_CMD_NO_PM	8
2375 #define	SD_CHAIN_INFO_USCSI_CHKSUM	7
2376 
2377 /* un->un_direct_chain_type must be set to one of these */
2378 #define	SD_CHAIN_INFO_DIRECT_CMD	8
2379 
2380 /* un->un_priority_chain_type must be set to one of these */
2381 #define	SD_CHAIN_INFO_PRIORITY_CMD	9
2382 
2383 /* size for devid inquiries */
2384 #define	MAX_INQUIRY_SIZE		0xF0
2385 
2386 /*
2387  * Macros used by functions to pass a given buf(9S) struct along to the
2388  * next function in the layering chain for further processing.
2389  *
2390  * In the following macros, passing more than three arguments to the called
2391  * routines causes the optimizer for the SPARC compiler to stop doing tail
2392  * call elimination which results in significant performance degradation.
2393  */
2394 #define	SD_BEGIN_IOSTART(index, un, bp)	\
2395 	((*(sd_iostart_chain[index]))(index, un, bp))
2396 
2397 #define	SD_BEGIN_IODONE(index, un, bp)	\
2398 	((*(sd_iodone_chain[index]))(index, un, bp))
2399 
2400 #define	SD_NEXT_IOSTART(index, un, bp)				\
2401 	((*(sd_iostart_chain[(index) + 1]))((index) + 1, un, bp))
2402 
2403 #define	SD_NEXT_IODONE(index, un, bp)				\
2404 	((*(sd_iodone_chain[(index) - 1]))((index) - 1, un, bp))
2405 
2406 /*
2407  *    Function: _init
2408  *
2409  * Description: This is the driver _init(9E) entry point.
2410  *
2411  * Return Code: Returns the value from mod_install(9F) or
2412  *		ddi_soft_state_init(9F) as appropriate.
2413  *
2414  *     Context: Called when driver module loaded.
2415  */
2416 
2417 int
2418 _init(void)
2419 {
2420 	int	err;
2421 
2422 	/* establish driver name from module name */
2423 	sd_label = (char *)mod_modname(&modlinkage);
2424 
2425 #ifndef XPV_HVM_DRIVER
2426 	err = ddi_soft_state_init(&sd_state, sizeof (struct sd_lun),
2427 	    SD_MAXUNIT);
2428 	if (err != 0) {
2429 		return (err);
2430 	}
2431 
2432 #else /* XPV_HVM_DRIVER */
2433 	/* Remove the leading "hvm_" from the module name */
2434 	ASSERT(strncmp(sd_label, "hvm_", strlen("hvm_")) == 0);
2435 	sd_label += strlen("hvm_");
2436 
2437 #endif /* XPV_HVM_DRIVER */
2438 
2439 	mutex_init(&sd_detach_mutex, NULL, MUTEX_DRIVER, NULL);
2440 	mutex_init(&sd_log_mutex,    NULL, MUTEX_DRIVER, NULL);
2441 	mutex_init(&sd_label_mutex,  NULL, MUTEX_DRIVER, NULL);
2442 
2443 	mutex_init(&sd_tr.srq_resv_reclaim_mutex, NULL, MUTEX_DRIVER, NULL);
2444 	cv_init(&sd_tr.srq_resv_reclaim_cv, NULL, CV_DRIVER, NULL);
2445 	cv_init(&sd_tr.srq_inprocess_cv, NULL, CV_DRIVER, NULL);
2446 
2447 	/*
2448 	 * it's ok to init here even for fibre device
2449 	 */
2450 	sd_scsi_probe_cache_init();
2451 
2452 	sd_scsi_target_lun_init();
2453 
2454 	/*
2455 	 * Creating taskq before mod_install ensures that all callers (threads)
2456 	 * that enter the module after a successful mod_install encounter
2457 	 * a valid taskq.
2458 	 */
2459 	sd_taskq_create();
2460 
2461 	err = mod_install(&modlinkage);
2462 	if (err != 0) {
2463 		/* delete taskq if install fails */
2464 		sd_taskq_delete();
2465 
2466 		mutex_destroy(&sd_detach_mutex);
2467 		mutex_destroy(&sd_log_mutex);
2468 		mutex_destroy(&sd_label_mutex);
2469 
2470 		mutex_destroy(&sd_tr.srq_resv_reclaim_mutex);
2471 		cv_destroy(&sd_tr.srq_resv_reclaim_cv);
2472 		cv_destroy(&sd_tr.srq_inprocess_cv);
2473 
2474 		sd_scsi_probe_cache_fini();
2475 
2476 		sd_scsi_target_lun_fini();
2477 
2478 #ifndef XPV_HVM_DRIVER
2479 		ddi_soft_state_fini(&sd_state);
2480 #endif /* !XPV_HVM_DRIVER */
2481 		return (err);
2482 	}
2483 
2484 	return (err);
2485 }
2486 
2487 
2488 /*
2489  *    Function: _fini
2490  *
2491  * Description: This is the driver _fini(9E) entry point.
2492  *
2493  * Return Code: Returns the value from mod_remove(9F)
2494  *
2495  *     Context: Called when driver module is unloaded.
2496  */
2497 
2498 int
2499 _fini(void)
2500 {
2501 	int err;
2502 
2503 	if ((err = mod_remove(&modlinkage)) != 0) {
2504 		return (err);
2505 	}
2506 
2507 	sd_taskq_delete();
2508 
2509 	mutex_destroy(&sd_detach_mutex);
2510 	mutex_destroy(&sd_log_mutex);
2511 	mutex_destroy(&sd_label_mutex);
2512 	mutex_destroy(&sd_tr.srq_resv_reclaim_mutex);
2513 
2514 	sd_scsi_probe_cache_fini();
2515 
2516 	sd_scsi_target_lun_fini();
2517 
2518 	cv_destroy(&sd_tr.srq_resv_reclaim_cv);
2519 	cv_destroy(&sd_tr.srq_inprocess_cv);
2520 
2521 #ifndef XPV_HVM_DRIVER
2522 	ddi_soft_state_fini(&sd_state);
2523 #endif /* !XPV_HVM_DRIVER */
2524 
2525 	return (err);
2526 }
2527 
2528 
2529 /*
2530  *    Function: _info
2531  *
2532  * Description: This is the driver _info(9E) entry point.
2533  *
2534  *   Arguments: modinfop - pointer to the driver modinfo structure
2535  *
2536  * Return Code: Returns the value from mod_info(9F).
2537  *
2538  *     Context: Kernel thread context
2539  */
2540 
2541 int
2542 _info(struct modinfo *modinfop)
2543 {
2544 	return (mod_info(&modlinkage, modinfop));
2545 }
2546 
2547 
2548 /*
2549  * The following routines implement the driver message logging facility.
2550  * They provide component- and level- based debug output filtering.
2551  * Output may also be restricted to messages for a single instance by
2552  * specifying a soft state pointer in sd_debug_un. If sd_debug_un is set
2553  * to NULL, then messages for all instances are printed.
2554  *
2555  * These routines have been cloned from each other due to the language
2556  * constraints of macros and variable argument list processing.
2557  */
2558 
2559 
2560 /*
2561  *    Function: sd_log_err
2562  *
2563  * Description: This routine is called by the SD_ERROR macro for debug
2564  *		logging of error conditions.
2565  *
2566  *   Arguments: comp - driver component being logged
2567  *		dev  - pointer to driver info structure
2568  *		fmt  - error string and format to be logged
2569  */
2570 
2571 static void
2572 sd_log_err(uint_t comp, struct sd_lun *un, const char *fmt, ...)
2573 {
2574 	va_list		ap;
2575 	dev_info_t	*dev;
2576 
2577 	ASSERT(un != NULL);
2578 	dev = SD_DEVINFO(un);
2579 	ASSERT(dev != NULL);
2580 
2581 	/*
2582 	 * Filter messages based on the global component and level masks.
2583 	 * Also print if un matches the value of sd_debug_un, or if
2584 	 * sd_debug_un is set to NULL.
2585 	 */
2586 	if ((sd_component_mask & comp) && (sd_level_mask & SD_LOGMASK_ERROR) &&
2587 	    ((sd_debug_un == NULL) || (sd_debug_un == un))) {
2588 		mutex_enter(&sd_log_mutex);
2589 		va_start(ap, fmt);
2590 		(void) vsprintf(sd_log_buf, fmt, ap);
2591 		va_end(ap);
2592 		scsi_log(dev, sd_label, CE_CONT, "%s", sd_log_buf);
2593 		mutex_exit(&sd_log_mutex);
2594 	}
2595 #ifdef SD_FAULT_INJECTION
2596 	_NOTE(DATA_READABLE_WITHOUT_LOCK(sd_lun::sd_injection_mask));
2597 	if (un->sd_injection_mask & comp) {
2598 		mutex_enter(&sd_log_mutex);
2599 		va_start(ap, fmt);
2600 		(void) vsprintf(sd_log_buf, fmt, ap);
2601 		va_end(ap);
2602 		sd_injection_log(sd_log_buf, un);
2603 		mutex_exit(&sd_log_mutex);
2604 	}
2605 #endif
2606 }
2607 
2608 
2609 /*
2610  *    Function: sd_log_info
2611  *
2612  * Description: This routine is called by the SD_INFO macro for debug
2613  *		logging of general purpose informational conditions.
2614  *
2615  *   Arguments: comp - driver component being logged
2616  *		dev  - pointer to driver info structure
2617  *		fmt  - info string and format to be logged
2618  */
2619 
2620 static void
2621 sd_log_info(uint_t component, struct sd_lun *un, const char *fmt, ...)
2622 {
2623 	va_list		ap;
2624 	dev_info_t	*dev;
2625 
2626 	ASSERT(un != NULL);
2627 	dev = SD_DEVINFO(un);
2628 	ASSERT(dev != NULL);
2629 
2630 	/*
2631 	 * Filter messages based on the global component and level masks.
2632 	 * Also print if un matches the value of sd_debug_un, or if
2633 	 * sd_debug_un is set to NULL.
2634 	 */
2635 	if ((sd_component_mask & component) &&
2636 	    (sd_level_mask & SD_LOGMASK_INFO) &&
2637 	    ((sd_debug_un == NULL) || (sd_debug_un == un))) {
2638 		mutex_enter(&sd_log_mutex);
2639 		va_start(ap, fmt);
2640 		(void) vsprintf(sd_log_buf, fmt, ap);
2641 		va_end(ap);
2642 		scsi_log(dev, sd_label, CE_CONT, "%s", sd_log_buf);
2643 		mutex_exit(&sd_log_mutex);
2644 	}
2645 #ifdef SD_FAULT_INJECTION
2646 	_NOTE(DATA_READABLE_WITHOUT_LOCK(sd_lun::sd_injection_mask));
2647 	if (un->sd_injection_mask & component) {
2648 		mutex_enter(&sd_log_mutex);
2649 		va_start(ap, fmt);
2650 		(void) vsprintf(sd_log_buf, fmt, ap);
2651 		va_end(ap);
2652 		sd_injection_log(sd_log_buf, un);
2653 		mutex_exit(&sd_log_mutex);
2654 	}
2655 #endif
2656 }
2657 
2658 
2659 /*
2660  *    Function: sd_log_trace
2661  *
2662  * Description: This routine is called by the SD_TRACE macro for debug
2663  *		logging of trace conditions (i.e. function entry/exit).
2664  *
2665  *   Arguments: comp - driver component being logged
2666  *		dev  - pointer to driver info structure
2667  *		fmt  - trace string and format to be logged
2668  */
2669 
2670 static void
2671 sd_log_trace(uint_t component, struct sd_lun *un, const char *fmt, ...)
2672 {
2673 	va_list		ap;
2674 	dev_info_t	*dev;
2675 
2676 	ASSERT(un != NULL);
2677 	dev = SD_DEVINFO(un);
2678 	ASSERT(dev != NULL);
2679 
2680 	/*
2681 	 * Filter messages based on the global component and level masks.
2682 	 * Also print if un matches the value of sd_debug_un, or if
2683 	 * sd_debug_un is set to NULL.
2684 	 */
2685 	if ((sd_component_mask & component) &&
2686 	    (sd_level_mask & SD_LOGMASK_TRACE) &&
2687 	    ((sd_debug_un == NULL) || (sd_debug_un == un))) {
2688 		mutex_enter(&sd_log_mutex);
2689 		va_start(ap, fmt);
2690 		(void) vsprintf(sd_log_buf, fmt, ap);
2691 		va_end(ap);
2692 		scsi_log(dev, sd_label, CE_CONT, "%s", sd_log_buf);
2693 		mutex_exit(&sd_log_mutex);
2694 	}
2695 #ifdef SD_FAULT_INJECTION
2696 	_NOTE(DATA_READABLE_WITHOUT_LOCK(sd_lun::sd_injection_mask));
2697 	if (un->sd_injection_mask & component) {
2698 		mutex_enter(&sd_log_mutex);
2699 		va_start(ap, fmt);
2700 		(void) vsprintf(sd_log_buf, fmt, ap);
2701 		va_end(ap);
2702 		sd_injection_log(sd_log_buf, un);
2703 		mutex_exit(&sd_log_mutex);
2704 	}
2705 #endif
2706 }
2707 
2708 
2709 /*
2710  *    Function: sdprobe
2711  *
2712  * Description: This is the driver probe(9e) entry point function.
2713  *
2714  *   Arguments: devi - opaque device info handle
2715  *
2716  * Return Code: DDI_PROBE_SUCCESS: If the probe was successful.
2717  *              DDI_PROBE_FAILURE: If the probe failed.
2718  *              DDI_PROBE_PARTIAL: If the instance is not present now,
2719  *				   but may be present in the future.
2720  */
2721 
2722 static int
2723 sdprobe(dev_info_t *devi)
2724 {
2725 	struct scsi_device	*devp;
2726 	int			rval;
2727 #ifndef XPV_HVM_DRIVER
2728 	int			instance = ddi_get_instance(devi);
2729 #endif /* !XPV_HVM_DRIVER */
2730 
2731 	/*
2732 	 * if it wasn't for pln, sdprobe could actually be nulldev
2733 	 * in the "__fibre" case.
2734 	 */
2735 	if (ddi_dev_is_sid(devi) == DDI_SUCCESS) {
2736 		return (DDI_PROBE_DONTCARE);
2737 	}
2738 
2739 	devp = ddi_get_driver_private(devi);
2740 
2741 	if (devp == NULL) {
2742 		/* Ooops... nexus driver is mis-configured... */
2743 		return (DDI_PROBE_FAILURE);
2744 	}
2745 
2746 #ifndef XPV_HVM_DRIVER
2747 	if (ddi_get_soft_state(sd_state, instance) != NULL) {
2748 		return (DDI_PROBE_PARTIAL);
2749 	}
2750 #endif /* !XPV_HVM_DRIVER */
2751 
2752 	/*
2753 	 * Call the SCSA utility probe routine to see if we actually
2754 	 * have a target at this SCSI nexus.
2755 	 */
2756 	switch (sd_scsi_probe_with_cache(devp, NULL_FUNC)) {
2757 	case SCSIPROBE_EXISTS:
2758 		switch (devp->sd_inq->inq_dtype) {
2759 		case DTYPE_DIRECT:
2760 			rval = DDI_PROBE_SUCCESS;
2761 			break;
2762 		case DTYPE_RODIRECT:
2763 			/* CDs etc. Can be removable media */
2764 			rval = DDI_PROBE_SUCCESS;
2765 			break;
2766 		case DTYPE_OPTICAL:
2767 			/*
2768 			 * Rewritable optical driver HP115AA
2769 			 * Can also be removable media
2770 			 */
2771 
2772 			/*
2773 			 * Do not attempt to bind to  DTYPE_OPTICAL if
2774 			 * pre solaris 9 sparc sd behavior is required
2775 			 *
2776 			 * If first time through and sd_dtype_optical_bind
2777 			 * has not been set in /etc/system check properties
2778 			 */
2779 
2780 			if (sd_dtype_optical_bind  < 0) {
2781 				sd_dtype_optical_bind = ddi_prop_get_int
2782 				    (DDI_DEV_T_ANY, devi, 0,
2783 				    "optical-device-bind", 1);
2784 			}
2785 
2786 			if (sd_dtype_optical_bind == 0) {
2787 				rval = DDI_PROBE_FAILURE;
2788 			} else {
2789 				rval = DDI_PROBE_SUCCESS;
2790 			}
2791 			break;
2792 
2793 		case DTYPE_NOTPRESENT:
2794 		default:
2795 			rval = DDI_PROBE_FAILURE;
2796 			break;
2797 		}
2798 		break;
2799 	default:
2800 		rval = DDI_PROBE_PARTIAL;
2801 		break;
2802 	}
2803 
2804 	/*
2805 	 * This routine checks for resource allocation prior to freeing,
2806 	 * so it will take care of the "smart probing" case where a
2807 	 * scsi_probe() may or may not have been issued and will *not*
2808 	 * free previously-freed resources.
2809 	 */
2810 	scsi_unprobe(devp);
2811 	return (rval);
2812 }
2813 
2814 
2815 /*
2816  *    Function: sdinfo
2817  *
2818  * Description: This is the driver getinfo(9e) entry point function.
2819  * 		Given the device number, return the devinfo pointer from
2820  *		the scsi_device structure or the instance number
2821  *		associated with the dev_t.
2822  *
2823  *   Arguments: dip     - pointer to device info structure
2824  *		infocmd - command argument (DDI_INFO_DEVT2DEVINFO,
2825  *			  DDI_INFO_DEVT2INSTANCE)
2826  *		arg     - driver dev_t
2827  *		resultp - user buffer for request response
2828  *
2829  * Return Code: DDI_SUCCESS
2830  *              DDI_FAILURE
2831  */
2832 /* ARGSUSED */
2833 static int
2834 sdinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
2835 {
2836 	struct sd_lun	*un;
2837 	dev_t		dev;
2838 	int		instance;
2839 	int		error;
2840 
2841 	switch (infocmd) {
2842 	case DDI_INFO_DEVT2DEVINFO:
2843 		dev = (dev_t)arg;
2844 		instance = SDUNIT(dev);
2845 		if ((un = ddi_get_soft_state(sd_state, instance)) == NULL) {
2846 			return (DDI_FAILURE);
2847 		}
2848 		*result = (void *) SD_DEVINFO(un);
2849 		error = DDI_SUCCESS;
2850 		break;
2851 	case DDI_INFO_DEVT2INSTANCE:
2852 		dev = (dev_t)arg;
2853 		instance = SDUNIT(dev);
2854 		*result = (void *)(uintptr_t)instance;
2855 		error = DDI_SUCCESS;
2856 		break;
2857 	default:
2858 		error = DDI_FAILURE;
2859 	}
2860 	return (error);
2861 }
2862 
2863 /*
2864  *    Function: sd_prop_op
2865  *
2866  * Description: This is the driver prop_op(9e) entry point function.
2867  *		Return the number of blocks for the partition in question
2868  *		or forward the request to the property facilities.
2869  *
2870  *   Arguments: dev       - device number
2871  *		dip       - pointer to device info structure
2872  *		prop_op   - property operator
2873  *		mod_flags - DDI_PROP_DONTPASS, don't pass to parent
2874  *		name      - pointer to property name
2875  *		valuep    - pointer or address of the user buffer
2876  *		lengthp   - property length
2877  *
2878  * Return Code: DDI_PROP_SUCCESS
2879  *              DDI_PROP_NOT_FOUND
2880  *              DDI_PROP_UNDEFINED
2881  *              DDI_PROP_NO_MEMORY
2882  *              DDI_PROP_BUF_TOO_SMALL
2883  */
2884 
2885 static int
2886 sd_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, int mod_flags,
2887 	char *name, caddr_t valuep, int *lengthp)
2888 {
2889 	struct sd_lun	*un;
2890 
2891 	if ((un = ddi_get_soft_state(sd_state, ddi_get_instance(dip))) == NULL)
2892 		return (ddi_prop_op(dev, dip, prop_op, mod_flags,
2893 		    name, valuep, lengthp));
2894 
2895 	return (cmlb_prop_op(un->un_cmlbhandle,
2896 	    dev, dip, prop_op, mod_flags, name, valuep, lengthp,
2897 	    SDPART(dev), (void *)SD_PATH_DIRECT));
2898 }
2899 
2900 /*
2901  * The following functions are for smart probing:
2902  * sd_scsi_probe_cache_init()
2903  * sd_scsi_probe_cache_fini()
2904  * sd_scsi_clear_probe_cache()
2905  * sd_scsi_probe_with_cache()
2906  */
2907 
2908 /*
2909  *    Function: sd_scsi_probe_cache_init
2910  *
2911  * Description: Initializes the probe response cache mutex and head pointer.
2912  *
2913  *     Context: Kernel thread context
2914  */
2915 
2916 static void
2917 sd_scsi_probe_cache_init(void)
2918 {
2919 	mutex_init(&sd_scsi_probe_cache_mutex, NULL, MUTEX_DRIVER, NULL);
2920 	sd_scsi_probe_cache_head = NULL;
2921 }
2922 
2923 
2924 /*
2925  *    Function: sd_scsi_probe_cache_fini
2926  *
2927  * Description: Frees all resources associated with the probe response cache.
2928  *
2929  *     Context: Kernel thread context
2930  */
2931 
2932 static void
2933 sd_scsi_probe_cache_fini(void)
2934 {
2935 	struct sd_scsi_probe_cache *cp;
2936 	struct sd_scsi_probe_cache *ncp;
2937 
2938 	/* Clean up our smart probing linked list */
2939 	for (cp = sd_scsi_probe_cache_head; cp != NULL; cp = ncp) {
2940 		ncp = cp->next;
2941 		kmem_free(cp, sizeof (struct sd_scsi_probe_cache));
2942 	}
2943 	sd_scsi_probe_cache_head = NULL;
2944 	mutex_destroy(&sd_scsi_probe_cache_mutex);
2945 }
2946 
2947 
2948 /*
2949  *    Function: sd_scsi_clear_probe_cache
2950  *
2951  * Description: This routine clears the probe response cache. This is
2952  *		done when open() returns ENXIO so that when deferred
2953  *		attach is attempted (possibly after a device has been
2954  *		turned on) we will retry the probe. Since we don't know
2955  *		which target we failed to open, we just clear the
2956  *		entire cache.
2957  *
2958  *     Context: Kernel thread context
2959  */
2960 
2961 static void
2962 sd_scsi_clear_probe_cache(void)
2963 {
2964 	struct sd_scsi_probe_cache	*cp;
2965 	int				i;
2966 
2967 	mutex_enter(&sd_scsi_probe_cache_mutex);
2968 	for (cp = sd_scsi_probe_cache_head; cp != NULL; cp = cp->next) {
2969 		/*
2970 		 * Reset all entries to SCSIPROBE_EXISTS.  This will
2971 		 * force probing to be performed the next time
2972 		 * sd_scsi_probe_with_cache is called.
2973 		 */
2974 		for (i = 0; i < NTARGETS_WIDE; i++) {
2975 			cp->cache[i] = SCSIPROBE_EXISTS;
2976 		}
2977 	}
2978 	mutex_exit(&sd_scsi_probe_cache_mutex);
2979 }
2980 
2981 
2982 /*
2983  *    Function: sd_scsi_probe_with_cache
2984  *
2985  * Description: This routine implements support for a scsi device probe
2986  *		with cache. The driver maintains a cache of the target
2987  *		responses to scsi probes. If we get no response from a
2988  *		target during a probe inquiry, we remember that, and we
2989  *		avoid additional calls to scsi_probe on non-zero LUNs
2990  *		on the same target until the cache is cleared. By doing
2991  *		so we avoid the 1/4 sec selection timeout for nonzero
2992  *		LUNs. lun0 of a target is always probed.
2993  *
2994  *   Arguments: devp     - Pointer to a scsi_device(9S) structure
2995  *              waitfunc - indicates what the allocator routines should
2996  *			   do when resources are not available. This value
2997  *			   is passed on to scsi_probe() when that routine
2998  *			   is called.
2999  *
3000  * Return Code: SCSIPROBE_NORESP if a NORESP in probe response cache;
3001  *		otherwise the value returned by scsi_probe(9F).
3002  *
3003  *     Context: Kernel thread context
3004  */
3005 
3006 static int
3007 sd_scsi_probe_with_cache(struct scsi_device *devp, int (*waitfn)())
3008 {
3009 	struct sd_scsi_probe_cache	*cp;
3010 	dev_info_t	*pdip = ddi_get_parent(devp->sd_dev);
3011 	int		lun, tgt;
3012 
3013 	lun = ddi_prop_get_int(DDI_DEV_T_ANY, devp->sd_dev, DDI_PROP_DONTPASS,
3014 	    SCSI_ADDR_PROP_LUN, 0);
3015 	tgt = ddi_prop_get_int(DDI_DEV_T_ANY, devp->sd_dev, DDI_PROP_DONTPASS,
3016 	    SCSI_ADDR_PROP_TARGET, -1);
3017 
3018 	/* Make sure caching enabled and target in range */
3019 	if ((tgt < 0) || (tgt >= NTARGETS_WIDE)) {
3020 		/* do it the old way (no cache) */
3021 		return (scsi_probe(devp, waitfn));
3022 	}
3023 
3024 	mutex_enter(&sd_scsi_probe_cache_mutex);
3025 
3026 	/* Find the cache for this scsi bus instance */
3027 	for (cp = sd_scsi_probe_cache_head; cp != NULL; cp = cp->next) {
3028 		if (cp->pdip == pdip) {
3029 			break;
3030 		}
3031 	}
3032 
3033 	/* If we can't find a cache for this pdip, create one */
3034 	if (cp == NULL) {
3035 		int i;
3036 
3037 		cp = kmem_zalloc(sizeof (struct sd_scsi_probe_cache),
3038 		    KM_SLEEP);
3039 		cp->pdip = pdip;
3040 		cp->next = sd_scsi_probe_cache_head;
3041 		sd_scsi_probe_cache_head = cp;
3042 		for (i = 0; i < NTARGETS_WIDE; i++) {
3043 			cp->cache[i] = SCSIPROBE_EXISTS;
3044 		}
3045 	}
3046 
3047 	mutex_exit(&sd_scsi_probe_cache_mutex);
3048 
3049 	/* Recompute the cache for this target if LUN zero */
3050 	if (lun == 0) {
3051 		cp->cache[tgt] = SCSIPROBE_EXISTS;
3052 	}
3053 
3054 	/* Don't probe if cache remembers a NORESP from a previous LUN. */
3055 	if (cp->cache[tgt] != SCSIPROBE_EXISTS) {
3056 		return (SCSIPROBE_NORESP);
3057 	}
3058 
3059 	/* Do the actual probe; save & return the result */
3060 	return (cp->cache[tgt] = scsi_probe(devp, waitfn));
3061 }
3062 
3063 
3064 /*
3065  *    Function: sd_scsi_target_lun_init
3066  *
3067  * Description: Initializes the attached lun chain mutex and head pointer.
3068  *
3069  *     Context: Kernel thread context
3070  */
3071 
3072 static void
3073 sd_scsi_target_lun_init(void)
3074 {
3075 	mutex_init(&sd_scsi_target_lun_mutex, NULL, MUTEX_DRIVER, NULL);
3076 	sd_scsi_target_lun_head = NULL;
3077 }
3078 
3079 
3080 /*
3081  *    Function: sd_scsi_target_lun_fini
3082  *
3083  * Description: Frees all resources associated with the attached lun
3084  *              chain
3085  *
3086  *     Context: Kernel thread context
3087  */
3088 
3089 static void
3090 sd_scsi_target_lun_fini(void)
3091 {
3092 	struct sd_scsi_hba_tgt_lun	*cp;
3093 	struct sd_scsi_hba_tgt_lun	*ncp;
3094 
3095 	for (cp = sd_scsi_target_lun_head; cp != NULL; cp = ncp) {
3096 		ncp = cp->next;
3097 		kmem_free(cp, sizeof (struct sd_scsi_hba_tgt_lun));
3098 	}
3099 	sd_scsi_target_lun_head = NULL;
3100 	mutex_destroy(&sd_scsi_target_lun_mutex);
3101 }
3102 
3103 
3104 /*
3105  *    Function: sd_scsi_get_target_lun_count
3106  *
3107  * Description: This routine will check in the attached lun chain to see
3108  * 		how many luns are attached on the required SCSI controller
3109  * 		and target. Currently, some capabilities like tagged queue
3110  *		are supported per target based by HBA. So all luns in a
3111  *		target have the same capabilities. Based on this assumption,
3112  * 		sd should only set these capabilities once per target. This
3113  *		function is called when sd needs to decide how many luns
3114  *		already attached on a target.
3115  *
3116  *   Arguments: dip	- Pointer to the system's dev_info_t for the SCSI
3117  *			  controller device.
3118  *              target	- The target ID on the controller's SCSI bus.
3119  *
3120  * Return Code: The number of luns attached on the required target and
3121  *		controller.
3122  *		-1 if target ID is not in parallel SCSI scope or the given
3123  * 		dip is not in the chain.
3124  *
3125  *     Context: Kernel thread context
3126  */
3127 
3128 static int
3129 sd_scsi_get_target_lun_count(dev_info_t *dip, int target)
3130 {
3131 	struct sd_scsi_hba_tgt_lun	*cp;
3132 
3133 	if ((target < 0) || (target >= NTARGETS_WIDE)) {
3134 		return (-1);
3135 	}
3136 
3137 	mutex_enter(&sd_scsi_target_lun_mutex);
3138 
3139 	for (cp = sd_scsi_target_lun_head; cp != NULL; cp = cp->next) {
3140 		if (cp->pdip == dip) {
3141 			break;
3142 		}
3143 	}
3144 
3145 	mutex_exit(&sd_scsi_target_lun_mutex);
3146 
3147 	if (cp == NULL) {
3148 		return (-1);
3149 	}
3150 
3151 	return (cp->nlun[target]);
3152 }
3153 
3154 
3155 /*
3156  *    Function: sd_scsi_update_lun_on_target
3157  *
3158  * Description: This routine is used to update the attached lun chain when a
3159  *		lun is attached or detached on a target.
3160  *
3161  *   Arguments: dip     - Pointer to the system's dev_info_t for the SCSI
3162  *                        controller device.
3163  *              target  - The target ID on the controller's SCSI bus.
3164  *		flag	- Indicate the lun is attached or detached.
3165  *
3166  *     Context: Kernel thread context
3167  */
3168 
3169 static void
3170 sd_scsi_update_lun_on_target(dev_info_t *dip, int target, int flag)
3171 {
3172 	struct sd_scsi_hba_tgt_lun	*cp;
3173 
3174 	mutex_enter(&sd_scsi_target_lun_mutex);
3175 
3176 	for (cp = sd_scsi_target_lun_head; cp != NULL; cp = cp->next) {
3177 		if (cp->pdip == dip) {
3178 			break;
3179 		}
3180 	}
3181 
3182 	if ((cp == NULL) && (flag == SD_SCSI_LUN_ATTACH)) {
3183 		cp = kmem_zalloc(sizeof (struct sd_scsi_hba_tgt_lun),
3184 		    KM_SLEEP);
3185 		cp->pdip = dip;
3186 		cp->next = sd_scsi_target_lun_head;
3187 		sd_scsi_target_lun_head = cp;
3188 	}
3189 
3190 	mutex_exit(&sd_scsi_target_lun_mutex);
3191 
3192 	if (cp != NULL) {
3193 		if (flag == SD_SCSI_LUN_ATTACH) {
3194 			cp->nlun[target] ++;
3195 		} else {
3196 			cp->nlun[target] --;
3197 		}
3198 	}
3199 }
3200 
3201 
3202 /*
3203  *    Function: sd_spin_up_unit
3204  *
3205  * Description: Issues the following commands to spin-up the device:
3206  *		START STOP UNIT, and INQUIRY.
3207  *
3208  *   Arguments: ssc   - ssc contains pointer to driver soft state (unit)
3209  *                      structure for this target.
3210  *
3211  * Return Code: 0 - success
3212  *		EIO - failure
3213  *		EACCES - reservation conflict
3214  *
3215  *     Context: Kernel thread context
3216  */
3217 
3218 static int
3219 sd_spin_up_unit(sd_ssc_t *ssc)
3220 {
3221 	size_t	resid		= 0;
3222 	int	has_conflict	= FALSE;
3223 	uchar_t *bufaddr;
3224 	int 	status;
3225 	struct sd_lun	*un;
3226 
3227 	ASSERT(ssc != NULL);
3228 	un = ssc->ssc_un;
3229 	ASSERT(un != NULL);
3230 
3231 	/*
3232 	 * Send a throwaway START UNIT command.
3233 	 *
3234 	 * If we fail on this, we don't care presently what precisely
3235 	 * is wrong.  EMC's arrays will also fail this with a check
3236 	 * condition (0x2/0x4/0x3) if the device is "inactive," but
3237 	 * we don't want to fail the attach because it may become
3238 	 * "active" later.
3239 	 * We don't know if power condition is supported or not at
3240 	 * this stage, use START STOP bit.
3241 	 */
3242 	status = sd_send_scsi_START_STOP_UNIT(ssc, SD_START_STOP,
3243 	    SD_TARGET_START, SD_PATH_DIRECT);
3244 
3245 	if (status != 0) {
3246 		if (status == EACCES)
3247 			has_conflict = TRUE;
3248 		sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3249 	}
3250 
3251 	/*
3252 	 * Send another INQUIRY command to the target. This is necessary for
3253 	 * non-removable media direct access devices because their INQUIRY data
3254 	 * may not be fully qualified until they are spun up (perhaps via the
3255 	 * START command above).  Note: This seems to be needed for some
3256 	 * legacy devices only.) The INQUIRY command should succeed even if a
3257 	 * Reservation Conflict is present.
3258 	 */
3259 	bufaddr = kmem_zalloc(SUN_INQSIZE, KM_SLEEP);
3260 
3261 	if (sd_send_scsi_INQUIRY(ssc, bufaddr, SUN_INQSIZE, 0, 0, &resid)
3262 	    != 0) {
3263 		kmem_free(bufaddr, SUN_INQSIZE);
3264 		sd_ssc_assessment(ssc, SD_FMT_STATUS_CHECK);
3265 		return (EIO);
3266 	}
3267 
3268 	/*
3269 	 * If we got enough INQUIRY data, copy it over the old INQUIRY data.
3270 	 * Note that this routine does not return a failure here even if the
3271 	 * INQUIRY command did not return any data.  This is a legacy behavior.
3272 	 */
3273 	if ((SUN_INQSIZE - resid) >= SUN_MIN_INQLEN) {
3274 		bcopy(bufaddr, SD_INQUIRY(un), SUN_INQSIZE);
3275 	}
3276 
3277 	kmem_free(bufaddr, SUN_INQSIZE);
3278 
3279 	/* If we hit a reservation conflict above, tell the caller. */
3280 	if (has_conflict == TRUE) {
3281 		return (EACCES);
3282 	}
3283 
3284 	return (0);
3285 }
3286 
3287 #ifdef _LP64
3288 /*
3289  *    Function: sd_enable_descr_sense
3290  *
3291  * Description: This routine attempts to select descriptor sense format
3292  *		using the Control mode page.  Devices that support 64 bit
3293  *		LBAs (for >2TB luns) should also implement descriptor
3294  *		sense data so we will call this function whenever we see
3295  *		a lun larger than 2TB.  If for some reason the device
3296  *		supports 64 bit LBAs but doesn't support descriptor sense
3297  *		presumably the mode select will fail.  Everything will
3298  *		continue to work normally except that we will not get
3299  *		complete sense data for commands that fail with an LBA
3300  *		larger than 32 bits.
3301  *
3302  *   Arguments: ssc   - ssc contains pointer to driver soft state (unit)
3303  *                      structure for this target.
3304  *
3305  *     Context: Kernel thread context only
3306  */
3307 
3308 static void
3309 sd_enable_descr_sense(sd_ssc_t *ssc)
3310 {
3311 	uchar_t			*header;
3312 	struct mode_control_scsi3 *ctrl_bufp;
3313 	size_t			buflen;
3314 	size_t			bd_len;
3315 	int			status;
3316 	struct sd_lun		*un;
3317 
3318 	ASSERT(ssc != NULL);
3319 	un = ssc->ssc_un;
3320 	ASSERT(un != NULL);
3321 
3322 	/*
3323 	 * Read MODE SENSE page 0xA, Control Mode Page
3324 	 */
3325 	buflen = MODE_HEADER_LENGTH + MODE_BLK_DESC_LENGTH +
3326 	    sizeof (struct mode_control_scsi3);
3327 	header = kmem_zalloc(buflen, KM_SLEEP);
3328 
3329 	status = sd_send_scsi_MODE_SENSE(ssc, CDB_GROUP0, header, buflen,
3330 	    MODEPAGE_CTRL_MODE, SD_PATH_DIRECT);
3331 
3332 	if (status != 0) {
3333 		SD_ERROR(SD_LOG_COMMON, un,
3334 		    "sd_enable_descr_sense: mode sense ctrl page failed\n");
3335 		goto eds_exit;
3336 	}
3337 
3338 	/*
3339 	 * Determine size of Block Descriptors in order to locate
3340 	 * the mode page data. ATAPI devices return 0, SCSI devices
3341 	 * should return MODE_BLK_DESC_LENGTH.
3342 	 */
3343 	bd_len  = ((struct mode_header *)header)->bdesc_length;
3344 
3345 	/* Clear the mode data length field for MODE SELECT */
3346 	((struct mode_header *)header)->length = 0;
3347 
3348 	ctrl_bufp = (struct mode_control_scsi3 *)
3349 	    (header + MODE_HEADER_LENGTH + bd_len);
3350 
3351 	/*
3352 	 * If the page length is smaller than the expected value,
3353 	 * the target device doesn't support D_SENSE. Bail out here.
3354 	 */
3355 	if (ctrl_bufp->mode_page.length <
3356 	    sizeof (struct mode_control_scsi3) - 2) {
3357 		SD_ERROR(SD_LOG_COMMON, un,
3358 		    "sd_enable_descr_sense: enable D_SENSE failed\n");
3359 		goto eds_exit;
3360 	}
3361 
3362 	/*
3363 	 * Clear PS bit for MODE SELECT
3364 	 */
3365 	ctrl_bufp->mode_page.ps = 0;
3366 
3367 	/*
3368 	 * Set D_SENSE to enable descriptor sense format.
3369 	 */
3370 	ctrl_bufp->d_sense = 1;
3371 
3372 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3373 
3374 	/*
3375 	 * Use MODE SELECT to commit the change to the D_SENSE bit
3376 	 */
3377 	status = sd_send_scsi_MODE_SELECT(ssc, CDB_GROUP0, header,
3378 	    buflen, SD_DONTSAVE_PAGE, SD_PATH_DIRECT);
3379 
3380 	if (status != 0) {
3381 		SD_INFO(SD_LOG_COMMON, un,
3382 		    "sd_enable_descr_sense: mode select ctrl page failed\n");
3383 	} else {
3384 		kmem_free(header, buflen);
3385 		return;
3386 	}
3387 
3388 eds_exit:
3389 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3390 	kmem_free(header, buflen);
3391 }
3392 
3393 /*
3394  *    Function: sd_reenable_dsense_task
3395  *
3396  * Description: Re-enable descriptor sense after device or bus reset
3397  *
3398  *     Context: Executes in a taskq() thread context
3399  */
3400 static void
3401 sd_reenable_dsense_task(void *arg)
3402 {
3403 	struct	sd_lun	*un = arg;
3404 	sd_ssc_t	*ssc;
3405 
3406 	ASSERT(un != NULL);
3407 
3408 	ssc = sd_ssc_init(un);
3409 	sd_enable_descr_sense(ssc);
3410 	sd_ssc_fini(ssc);
3411 }
3412 #endif /* _LP64 */
3413 
3414 /*
3415  *    Function: sd_set_mmc_caps
3416  *
3417  * Description: This routine determines if the device is MMC compliant and if
3418  *		the device supports CDDA via a mode sense of the CDVD
3419  *		capabilities mode page. Also checks if the device is a
3420  *		dvdram writable device.
3421  *
3422  *   Arguments: ssc   - ssc contains pointer to driver soft state (unit)
3423  *                      structure for this target.
3424  *
3425  *     Context: Kernel thread context only
3426  */
3427 
3428 static void
3429 sd_set_mmc_caps(sd_ssc_t *ssc)
3430 {
3431 	struct mode_header_grp2		*sense_mhp;
3432 	uchar_t				*sense_page;
3433 	caddr_t				buf;
3434 	int				bd_len;
3435 	int				status;
3436 	struct uscsi_cmd		com;
3437 	int				rtn;
3438 	uchar_t				*out_data_rw, *out_data_hd;
3439 	uchar_t				*rqbuf_rw, *rqbuf_hd;
3440 	uchar_t				*out_data_gesn;
3441 	int				gesn_len;
3442 	struct sd_lun			*un;
3443 
3444 	ASSERT(ssc != NULL);
3445 	un = ssc->ssc_un;
3446 	ASSERT(un != NULL);
3447 
3448 	/*
3449 	 * The flags which will be set in this function are - mmc compliant,
3450 	 * dvdram writable device, cdda support. Initialize them to FALSE
3451 	 * and if a capability is detected - it will be set to TRUE.
3452 	 */
3453 	un->un_f_mmc_cap = FALSE;
3454 	un->un_f_dvdram_writable_device = FALSE;
3455 	un->un_f_cfg_cdda = FALSE;
3456 
3457 	buf = kmem_zalloc(BUFLEN_MODE_CDROM_CAP, KM_SLEEP);
3458 	status = sd_send_scsi_MODE_SENSE(ssc, CDB_GROUP1, (uchar_t *)buf,
3459 	    BUFLEN_MODE_CDROM_CAP, MODEPAGE_CDROM_CAP, SD_PATH_DIRECT);
3460 
3461 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3462 
3463 	if (status != 0) {
3464 		/* command failed; just return */
3465 		kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3466 		return;
3467 	}
3468 	/*
3469 	 * If the mode sense request for the CDROM CAPABILITIES
3470 	 * page (0x2A) succeeds the device is assumed to be MMC.
3471 	 */
3472 	un->un_f_mmc_cap = TRUE;
3473 
3474 	/* See if GET STATUS EVENT NOTIFICATION is supported */
3475 	if (un->un_f_mmc_gesn_polling) {
3476 		gesn_len = SD_GESN_HEADER_LEN + SD_GESN_MEDIA_DATA_LEN;
3477 		out_data_gesn = kmem_zalloc(gesn_len, KM_SLEEP);
3478 
3479 		rtn = sd_send_scsi_GET_EVENT_STATUS_NOTIFICATION(ssc,
3480 		    out_data_gesn, gesn_len, 1 << SD_GESN_MEDIA_CLASS);
3481 
3482 		sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3483 
3484 		if ((rtn != 0) || !sd_gesn_media_data_valid(out_data_gesn)) {
3485 			un->un_f_mmc_gesn_polling = FALSE;
3486 			SD_INFO(SD_LOG_ATTACH_DETACH, un,
3487 			    "sd_set_mmc_caps: gesn not supported "
3488 			    "%d %x %x %x %x\n", rtn,
3489 			    out_data_gesn[0], out_data_gesn[1],
3490 			    out_data_gesn[2], out_data_gesn[3]);
3491 		}
3492 
3493 		kmem_free(out_data_gesn, gesn_len);
3494 	}
3495 
3496 	/* Get to the page data */
3497 	sense_mhp = (struct mode_header_grp2 *)buf;
3498 	bd_len = (sense_mhp->bdesc_length_hi << 8) |
3499 	    sense_mhp->bdesc_length_lo;
3500 	if (bd_len > MODE_BLK_DESC_LENGTH) {
3501 		/*
3502 		 * We did not get back the expected block descriptor
3503 		 * length so we cannot determine if the device supports
3504 		 * CDDA. However, we still indicate the device is MMC
3505 		 * according to the successful response to the page
3506 		 * 0x2A mode sense request.
3507 		 */
3508 		scsi_log(SD_DEVINFO(un), sd_label, CE_WARN,
3509 		    "sd_set_mmc_caps: Mode Sense returned "
3510 		    "invalid block descriptor length\n");
3511 		kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3512 		return;
3513 	}
3514 
3515 	/* See if read CDDA is supported */
3516 	sense_page = (uchar_t *)(buf + MODE_HEADER_LENGTH_GRP2 +
3517 	    bd_len);
3518 	un->un_f_cfg_cdda = (sense_page[5] & 0x01) ? TRUE : FALSE;
3519 
3520 	/* See if writing DVD RAM is supported. */
3521 	un->un_f_dvdram_writable_device = (sense_page[3] & 0x20) ? TRUE : FALSE;
3522 	if (un->un_f_dvdram_writable_device == TRUE) {
3523 		kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3524 		return;
3525 	}
3526 
3527 	/*
3528 	 * If the device presents DVD or CD capabilities in the mode
3529 	 * page, we can return here since a RRD will not have
3530 	 * these capabilities.
3531 	 */
3532 	if ((sense_page[2] & 0x3f) || (sense_page[3] & 0x3f)) {
3533 		kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3534 		return;
3535 	}
3536 	kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3537 
3538 	/*
3539 	 * If un->un_f_dvdram_writable_device is still FALSE,
3540 	 * check for a Removable Rigid Disk (RRD).  A RRD
3541 	 * device is identified by the features RANDOM_WRITABLE and
3542 	 * HARDWARE_DEFECT_MANAGEMENT.
3543 	 */
3544 	out_data_rw = kmem_zalloc(SD_CURRENT_FEATURE_LEN, KM_SLEEP);
3545 	rqbuf_rw = kmem_zalloc(SENSE_LENGTH, KM_SLEEP);
3546 
3547 	rtn = sd_send_scsi_feature_GET_CONFIGURATION(ssc, &com, rqbuf_rw,
3548 	    SENSE_LENGTH, out_data_rw, SD_CURRENT_FEATURE_LEN,
3549 	    RANDOM_WRITABLE, SD_PATH_STANDARD);
3550 
3551 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3552 
3553 	if (rtn != 0) {
3554 		kmem_free(out_data_rw, SD_CURRENT_FEATURE_LEN);
3555 		kmem_free(rqbuf_rw, SENSE_LENGTH);
3556 		return;
3557 	}
3558 
3559 	out_data_hd = kmem_zalloc(SD_CURRENT_FEATURE_LEN, KM_SLEEP);
3560 	rqbuf_hd = kmem_zalloc(SENSE_LENGTH, KM_SLEEP);
3561 
3562 	rtn = sd_send_scsi_feature_GET_CONFIGURATION(ssc, &com, rqbuf_hd,
3563 	    SENSE_LENGTH, out_data_hd, SD_CURRENT_FEATURE_LEN,
3564 	    HARDWARE_DEFECT_MANAGEMENT, SD_PATH_STANDARD);
3565 
3566 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3567 
3568 	if (rtn == 0) {
3569 		/*
3570 		 * We have good information, check for random writable
3571 		 * and hardware defect features.
3572 		 */
3573 		if ((out_data_rw[9] & RANDOM_WRITABLE) &&
3574 		    (out_data_hd[9] & HARDWARE_DEFECT_MANAGEMENT)) {
3575 			un->un_f_dvdram_writable_device = TRUE;
3576 		}
3577 	}
3578 
3579 	kmem_free(out_data_rw, SD_CURRENT_FEATURE_LEN);
3580 	kmem_free(rqbuf_rw, SENSE_LENGTH);
3581 	kmem_free(out_data_hd, SD_CURRENT_FEATURE_LEN);
3582 	kmem_free(rqbuf_hd, SENSE_LENGTH);
3583 }
3584 
3585 /*
3586  *    Function: sd_check_for_writable_cd
3587  *
3588  * Description: This routine determines if the media in the device is
3589  *		writable or not. It uses the get configuration command (0x46)
3590  *		to determine if the media is writable
3591  *
3592  *   Arguments: un - driver soft state (unit) structure
3593  *              path_flag - SD_PATH_DIRECT to use the USCSI "direct"
3594  *                           chain and the normal command waitq, or
3595  *                           SD_PATH_DIRECT_PRIORITY to use the USCSI
3596  *                           "direct" chain and bypass the normal command
3597  *                           waitq.
3598  *
3599  *     Context: Never called at interrupt context.
3600  */
3601 
3602 static void
3603 sd_check_for_writable_cd(sd_ssc_t *ssc, int path_flag)
3604 {
3605 	struct uscsi_cmd		com;
3606