xref: /illumos-gate/usr/src/uts/common/io/scsi/targets/sd.c (revision 59d8f100)
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 by Delphix. All rights reserved.
28  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
29  * Copyright 2012 DEY Storage Systems, Inc.  All rights reserved.
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_nv_sup			ssd_get_nv_sup
932 #define	sd_make_device			ssd_make_device
933 #define	sdopen				ssdopen
934 #define	sdclose				ssdclose
935 #define	sd_ready_and_valid		ssd_ready_and_valid
936 #define	sdmin				ssdmin
937 #define	sdread				ssdread
938 #define	sdwrite				ssdwrite
939 #define	sdaread				ssdaread
940 #define	sdawrite			ssdawrite
941 #define	sdstrategy			ssdstrategy
942 #define	sdioctl				ssdioctl
943 #define	sd_mapblockaddr_iostart		ssd_mapblockaddr_iostart
944 #define	sd_mapblocksize_iostart		ssd_mapblocksize_iostart
945 #define	sd_checksum_iostart		ssd_checksum_iostart
946 #define	sd_checksum_uscsi_iostart	ssd_checksum_uscsi_iostart
947 #define	sd_pm_iostart			ssd_pm_iostart
948 #define	sd_core_iostart			ssd_core_iostart
949 #define	sd_mapblockaddr_iodone		ssd_mapblockaddr_iodone
950 #define	sd_mapblocksize_iodone		ssd_mapblocksize_iodone
951 #define	sd_checksum_iodone		ssd_checksum_iodone
952 #define	sd_checksum_uscsi_iodone	ssd_checksum_uscsi_iodone
953 #define	sd_pm_iodone			ssd_pm_iodone
954 #define	sd_initpkt_for_buf		ssd_initpkt_for_buf
955 #define	sd_destroypkt_for_buf		ssd_destroypkt_for_buf
956 #define	sd_setup_rw_pkt			ssd_setup_rw_pkt
957 #define	sd_setup_next_rw_pkt		ssd_setup_next_rw_pkt
958 #define	sd_buf_iodone			ssd_buf_iodone
959 #define	sd_uscsi_strategy		ssd_uscsi_strategy
960 #define	sd_initpkt_for_uscsi		ssd_initpkt_for_uscsi
961 #define	sd_destroypkt_for_uscsi		ssd_destroypkt_for_uscsi
962 #define	sd_uscsi_iodone			ssd_uscsi_iodone
963 #define	sd_xbuf_strategy		ssd_xbuf_strategy
964 #define	sd_xbuf_init			ssd_xbuf_init
965 #define	sd_pm_entry			ssd_pm_entry
966 #define	sd_pm_exit			ssd_pm_exit
967 
968 #define	sd_pm_idletimeout_handler	ssd_pm_idletimeout_handler
969 #define	sd_pm_timeout_handler		ssd_pm_timeout_handler
970 
971 #define	sd_add_buf_to_waitq		ssd_add_buf_to_waitq
972 #define	sdintr				ssdintr
973 #define	sd_start_cmds			ssd_start_cmds
974 #define	sd_send_scsi_cmd		ssd_send_scsi_cmd
975 #define	sd_bioclone_alloc		ssd_bioclone_alloc
976 #define	sd_bioclone_free		ssd_bioclone_free
977 #define	sd_shadow_buf_alloc		ssd_shadow_buf_alloc
978 #define	sd_shadow_buf_free		ssd_shadow_buf_free
979 #define	sd_print_transport_rejected_message	\
980 					ssd_print_transport_rejected_message
981 #define	sd_retry_command		ssd_retry_command
982 #define	sd_set_retry_bp			ssd_set_retry_bp
983 #define	sd_send_request_sense_command	ssd_send_request_sense_command
984 #define	sd_start_retry_command		ssd_start_retry_command
985 #define	sd_start_direct_priority_command	\
986 					ssd_start_direct_priority_command
987 #define	sd_return_failed_command	ssd_return_failed_command
988 #define	sd_return_failed_command_no_restart	\
989 					ssd_return_failed_command_no_restart
990 #define	sd_return_command		ssd_return_command
991 #define	sd_sync_with_callback		ssd_sync_with_callback
992 #define	sdrunout			ssdrunout
993 #define	sd_mark_rqs_busy		ssd_mark_rqs_busy
994 #define	sd_mark_rqs_idle		ssd_mark_rqs_idle
995 #define	sd_reduce_throttle		ssd_reduce_throttle
996 #define	sd_restore_throttle		ssd_restore_throttle
997 #define	sd_print_incomplete_msg		ssd_print_incomplete_msg
998 #define	sd_init_cdb_limits		ssd_init_cdb_limits
999 #define	sd_pkt_status_good		ssd_pkt_status_good
1000 #define	sd_pkt_status_check_condition	ssd_pkt_status_check_condition
1001 #define	sd_pkt_status_busy		ssd_pkt_status_busy
1002 #define	sd_pkt_status_reservation_conflict	\
1003 					ssd_pkt_status_reservation_conflict
1004 #define	sd_pkt_status_qfull		ssd_pkt_status_qfull
1005 #define	sd_handle_request_sense		ssd_handle_request_sense
1006 #define	sd_handle_auto_request_sense	ssd_handle_auto_request_sense
1007 #define	sd_print_sense_failed_msg	ssd_print_sense_failed_msg
1008 #define	sd_validate_sense_data		ssd_validate_sense_data
1009 #define	sd_decode_sense			ssd_decode_sense
1010 #define	sd_print_sense_msg		ssd_print_sense_msg
1011 #define	sd_sense_key_no_sense		ssd_sense_key_no_sense
1012 #define	sd_sense_key_recoverable_error	ssd_sense_key_recoverable_error
1013 #define	sd_sense_key_not_ready		ssd_sense_key_not_ready
1014 #define	sd_sense_key_medium_or_hardware_error	\
1015 					ssd_sense_key_medium_or_hardware_error
1016 #define	sd_sense_key_illegal_request	ssd_sense_key_illegal_request
1017 #define	sd_sense_key_unit_attention	ssd_sense_key_unit_attention
1018 #define	sd_sense_key_fail_command	ssd_sense_key_fail_command
1019 #define	sd_sense_key_blank_check	ssd_sense_key_blank_check
1020 #define	sd_sense_key_aborted_command	ssd_sense_key_aborted_command
1021 #define	sd_sense_key_default		ssd_sense_key_default
1022 #define	sd_print_retry_msg		ssd_print_retry_msg
1023 #define	sd_print_cmd_incomplete_msg	ssd_print_cmd_incomplete_msg
1024 #define	sd_pkt_reason_cmd_incomplete	ssd_pkt_reason_cmd_incomplete
1025 #define	sd_pkt_reason_cmd_tran_err	ssd_pkt_reason_cmd_tran_err
1026 #define	sd_pkt_reason_cmd_reset		ssd_pkt_reason_cmd_reset
1027 #define	sd_pkt_reason_cmd_aborted	ssd_pkt_reason_cmd_aborted
1028 #define	sd_pkt_reason_cmd_timeout	ssd_pkt_reason_cmd_timeout
1029 #define	sd_pkt_reason_cmd_unx_bus_free	ssd_pkt_reason_cmd_unx_bus_free
1030 #define	sd_pkt_reason_cmd_tag_reject	ssd_pkt_reason_cmd_tag_reject
1031 #define	sd_pkt_reason_default		ssd_pkt_reason_default
1032 #define	sd_reset_target			ssd_reset_target
1033 #define	sd_start_stop_unit_callback	ssd_start_stop_unit_callback
1034 #define	sd_start_stop_unit_task		ssd_start_stop_unit_task
1035 #define	sd_taskq_create			ssd_taskq_create
1036 #define	sd_taskq_delete			ssd_taskq_delete
1037 #define	sd_target_change_task		ssd_target_change_task
1038 #define	sd_log_dev_status_event		ssd_log_dev_status_event
1039 #define	sd_log_lun_expansion_event	ssd_log_lun_expansion_event
1040 #define	sd_log_eject_request_event	ssd_log_eject_request_event
1041 #define	sd_media_change_task		ssd_media_change_task
1042 #define	sd_handle_mchange		ssd_handle_mchange
1043 #define	sd_send_scsi_DOORLOCK		ssd_send_scsi_DOORLOCK
1044 #define	sd_send_scsi_READ_CAPACITY	ssd_send_scsi_READ_CAPACITY
1045 #define	sd_send_scsi_READ_CAPACITY_16	ssd_send_scsi_READ_CAPACITY_16
1046 #define	sd_send_scsi_GET_CONFIGURATION	ssd_send_scsi_GET_CONFIGURATION
1047 #define	sd_send_scsi_feature_GET_CONFIGURATION	\
1048 					sd_send_scsi_feature_GET_CONFIGURATION
1049 #define	sd_send_scsi_START_STOP_UNIT	ssd_send_scsi_START_STOP_UNIT
1050 #define	sd_send_scsi_INQUIRY		ssd_send_scsi_INQUIRY
1051 #define	sd_send_scsi_TEST_UNIT_READY	ssd_send_scsi_TEST_UNIT_READY
1052 #define	sd_send_scsi_PERSISTENT_RESERVE_IN	\
1053 					ssd_send_scsi_PERSISTENT_RESERVE_IN
1054 #define	sd_send_scsi_PERSISTENT_RESERVE_OUT	\
1055 					ssd_send_scsi_PERSISTENT_RESERVE_OUT
1056 #define	sd_send_scsi_SYNCHRONIZE_CACHE	ssd_send_scsi_SYNCHRONIZE_CACHE
1057 #define	sd_send_scsi_SYNCHRONIZE_CACHE_biodone	\
1058 					ssd_send_scsi_SYNCHRONIZE_CACHE_biodone
1059 #define	sd_send_scsi_MODE_SENSE		ssd_send_scsi_MODE_SENSE
1060 #define	sd_send_scsi_MODE_SELECT	ssd_send_scsi_MODE_SELECT
1061 #define	sd_send_scsi_RDWR		ssd_send_scsi_RDWR
1062 #define	sd_send_scsi_LOG_SENSE		ssd_send_scsi_LOG_SENSE
1063 #define	sd_send_scsi_GET_EVENT_STATUS_NOTIFICATION	\
1064 				ssd_send_scsi_GET_EVENT_STATUS_NOTIFICATION
1065 #define	sd_gesn_media_data_valid	ssd_gesn_media_data_valid
1066 #define	sd_alloc_rqs			ssd_alloc_rqs
1067 #define	sd_free_rqs			ssd_free_rqs
1068 #define	sd_dump_memory			ssd_dump_memory
1069 #define	sd_get_media_info_com		ssd_get_media_info_com
1070 #define	sd_get_media_info		ssd_get_media_info
1071 #define	sd_get_media_info_ext		ssd_get_media_info_ext
1072 #define	sd_dkio_ctrl_info		ssd_dkio_ctrl_info
1073 #define	sd_nvpair_str_decode		ssd_nvpair_str_decode
1074 #define	sd_strtok_r			ssd_strtok_r
1075 #define	sd_set_properties		ssd_set_properties
1076 #define	sd_get_tunables_from_conf	ssd_get_tunables_from_conf
1077 #define	sd_setup_next_xfer		ssd_setup_next_xfer
1078 #define	sd_dkio_get_temp		ssd_dkio_get_temp
1079 #define	sd_check_mhd			ssd_check_mhd
1080 #define	sd_mhd_watch_cb			ssd_mhd_watch_cb
1081 #define	sd_mhd_watch_incomplete		ssd_mhd_watch_incomplete
1082 #define	sd_sname			ssd_sname
1083 #define	sd_mhd_resvd_recover		ssd_mhd_resvd_recover
1084 #define	sd_resv_reclaim_thread		ssd_resv_reclaim_thread
1085 #define	sd_take_ownership		ssd_take_ownership
1086 #define	sd_reserve_release		ssd_reserve_release
1087 #define	sd_rmv_resv_reclaim_req		ssd_rmv_resv_reclaim_req
1088 #define	sd_mhd_reset_notify_cb		ssd_mhd_reset_notify_cb
1089 #define	sd_persistent_reservation_in_read_keys	\
1090 					ssd_persistent_reservation_in_read_keys
1091 #define	sd_persistent_reservation_in_read_resv	\
1092 					ssd_persistent_reservation_in_read_resv
1093 #define	sd_mhdioc_takeown		ssd_mhdioc_takeown
1094 #define	sd_mhdioc_failfast		ssd_mhdioc_failfast
1095 #define	sd_mhdioc_release		ssd_mhdioc_release
1096 #define	sd_mhdioc_register_devid	ssd_mhdioc_register_devid
1097 #define	sd_mhdioc_inkeys		ssd_mhdioc_inkeys
1098 #define	sd_mhdioc_inresv		ssd_mhdioc_inresv
1099 #define	sr_change_blkmode		ssr_change_blkmode
1100 #define	sr_change_speed			ssr_change_speed
1101 #define	sr_atapi_change_speed		ssr_atapi_change_speed
1102 #define	sr_pause_resume			ssr_pause_resume
1103 #define	sr_play_msf			ssr_play_msf
1104 #define	sr_play_trkind			ssr_play_trkind
1105 #define	sr_read_all_subcodes		ssr_read_all_subcodes
1106 #define	sr_read_subchannel		ssr_read_subchannel
1107 #define	sr_read_tocentry		ssr_read_tocentry
1108 #define	sr_read_tochdr			ssr_read_tochdr
1109 #define	sr_read_cdda			ssr_read_cdda
1110 #define	sr_read_cdxa			ssr_read_cdxa
1111 #define	sr_read_mode1			ssr_read_mode1
1112 #define	sr_read_mode2			ssr_read_mode2
1113 #define	sr_read_cd_mode2		ssr_read_cd_mode2
1114 #define	sr_sector_mode			ssr_sector_mode
1115 #define	sr_eject			ssr_eject
1116 #define	sr_ejected			ssr_ejected
1117 #define	sr_check_wp			ssr_check_wp
1118 #define	sd_watch_request_submit		ssd_watch_request_submit
1119 #define	sd_check_media			ssd_check_media
1120 #define	sd_media_watch_cb		ssd_media_watch_cb
1121 #define	sd_delayed_cv_broadcast		ssd_delayed_cv_broadcast
1122 #define	sr_volume_ctrl			ssr_volume_ctrl
1123 #define	sr_read_sony_session_offset	ssr_read_sony_session_offset
1124 #define	sd_log_page_supported		ssd_log_page_supported
1125 #define	sd_check_for_writable_cd	ssd_check_for_writable_cd
1126 #define	sd_wm_cache_constructor		ssd_wm_cache_constructor
1127 #define	sd_wm_cache_destructor		ssd_wm_cache_destructor
1128 #define	sd_range_lock			ssd_range_lock
1129 #define	sd_get_range			ssd_get_range
1130 #define	sd_free_inlist_wmap		ssd_free_inlist_wmap
1131 #define	sd_range_unlock			ssd_range_unlock
1132 #define	sd_read_modify_write_task	ssd_read_modify_write_task
1133 #define	sddump_do_read_of_rmw		ssddump_do_read_of_rmw
1134 
1135 #define	sd_iostart_chain		ssd_iostart_chain
1136 #define	sd_iodone_chain			ssd_iodone_chain
1137 #define	sd_initpkt_map			ssd_initpkt_map
1138 #define	sd_destroypkt_map		ssd_destroypkt_map
1139 #define	sd_chain_type_map		ssd_chain_type_map
1140 #define	sd_chain_index_map		ssd_chain_index_map
1141 
1142 #define	sd_failfast_flushctl		ssd_failfast_flushctl
1143 #define	sd_failfast_flushq		ssd_failfast_flushq
1144 #define	sd_failfast_flushq_callback	ssd_failfast_flushq_callback
1145 
1146 #define	sd_is_lsi			ssd_is_lsi
1147 #define	sd_tg_rdwr			ssd_tg_rdwr
1148 #define	sd_tg_getinfo			ssd_tg_getinfo
1149 #define	sd_rmw_msg_print_handler	ssd_rmw_msg_print_handler
1150 
1151 #endif	/* #if (defined(__fibre)) */
1152 
1153 
1154 int _init(void);
1155 int _fini(void);
1156 int _info(struct modinfo *modinfop);
1157 
1158 /*PRINTFLIKE3*/
1159 static void sd_log_trace(uint_t comp, struct sd_lun *un, const char *fmt, ...);
1160 /*PRINTFLIKE3*/
1161 static void sd_log_info(uint_t comp, struct sd_lun *un, const char *fmt, ...);
1162 /*PRINTFLIKE3*/
1163 static void sd_log_err(uint_t comp, struct sd_lun *un, const char *fmt, ...);
1164 
1165 static int sdprobe(dev_info_t *devi);
1166 static int sdinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg,
1167     void **result);
1168 static int sd_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op,
1169     int mod_flags, char *name, caddr_t valuep, int *lengthp);
1170 
1171 /*
1172  * Smart probe for parallel scsi
1173  */
1174 static void sd_scsi_probe_cache_init(void);
1175 static void sd_scsi_probe_cache_fini(void);
1176 static void sd_scsi_clear_probe_cache(void);
1177 static int  sd_scsi_probe_with_cache(struct scsi_device *devp, int (*fn)());
1178 
1179 /*
1180  * Attached luns on target for parallel scsi
1181  */
1182 static void sd_scsi_target_lun_init(void);
1183 static void sd_scsi_target_lun_fini(void);
1184 static int  sd_scsi_get_target_lun_count(dev_info_t *dip, int target);
1185 static void sd_scsi_update_lun_on_target(dev_info_t *dip, int target, int flag);
1186 
1187 static int	sd_spin_up_unit(sd_ssc_t *ssc);
1188 
1189 /*
1190  * Using sd_ssc_init to establish sd_ssc_t struct
1191  * Using sd_ssc_send to send uscsi internal command
1192  * Using sd_ssc_fini to free sd_ssc_t struct
1193  */
1194 static sd_ssc_t *sd_ssc_init(struct sd_lun *un);
1195 static int sd_ssc_send(sd_ssc_t *ssc, struct uscsi_cmd *incmd,
1196     int flag, enum uio_seg dataspace, int path_flag);
1197 static void sd_ssc_fini(sd_ssc_t *ssc);
1198 
1199 /*
1200  * Using sd_ssc_assessment to set correct type-of-assessment
1201  * Using sd_ssc_post to post ereport & system log
1202  *       sd_ssc_post will call sd_ssc_print to print system log
1203  *       sd_ssc_post will call sd_ssd_ereport_post to post ereport
1204  */
1205 static void sd_ssc_assessment(sd_ssc_t *ssc,
1206     enum sd_type_assessment tp_assess);
1207 
1208 static void sd_ssc_post(sd_ssc_t *ssc, enum sd_driver_assessment sd_assess);
1209 static void sd_ssc_print(sd_ssc_t *ssc, int sd_severity);
1210 static void sd_ssc_ereport_post(sd_ssc_t *ssc,
1211     enum sd_driver_assessment drv_assess);
1212 
1213 /*
1214  * Using sd_ssc_set_info to mark an un-decodable-data error.
1215  * Using sd_ssc_extract_info to transfer information from internal
1216  *       data structures to sd_ssc_t.
1217  */
1218 static void sd_ssc_set_info(sd_ssc_t *ssc, int ssc_flags, uint_t comp,
1219     const char *fmt, ...);
1220 static void sd_ssc_extract_info(sd_ssc_t *ssc, struct sd_lun *un,
1221     struct scsi_pkt *pktp, struct buf *bp, struct sd_xbuf *xp);
1222 
1223 static int sd_send_scsi_cmd(dev_t dev, struct uscsi_cmd *incmd, int flag,
1224     enum uio_seg dataspace, int path_flag);
1225 
1226 #ifdef _LP64
1227 static void	sd_enable_descr_sense(sd_ssc_t *ssc);
1228 static void	sd_reenable_dsense_task(void *arg);
1229 #endif /* _LP64 */
1230 
1231 static void	sd_set_mmc_caps(sd_ssc_t *ssc);
1232 
1233 static void sd_read_unit_properties(struct sd_lun *un);
1234 static int  sd_process_sdconf_file(struct sd_lun *un);
1235 static void sd_nvpair_str_decode(struct sd_lun *un, char *nvpair_str);
1236 static char *sd_strtok_r(char *string, const char *sepset, char **lasts);
1237 static void sd_set_properties(struct sd_lun *un, char *name, char *value);
1238 static void sd_get_tunables_from_conf(struct sd_lun *un, int flags,
1239     int *data_list, sd_tunables *values);
1240 static void sd_process_sdconf_table(struct sd_lun *un);
1241 static int  sd_sdconf_id_match(struct sd_lun *un, char *id, int idlen);
1242 static int  sd_blank_cmp(struct sd_lun *un, char *id, int idlen);
1243 static int  sd_chk_vers1_data(struct sd_lun *un, int flags, int *prop_list,
1244 	int list_len, char *dataname_ptr);
1245 static void sd_set_vers1_properties(struct sd_lun *un, int flags,
1246     sd_tunables *prop_list);
1247 
1248 static void sd_register_devid(sd_ssc_t *ssc, dev_info_t *devi,
1249     int reservation_flag);
1250 static int  sd_get_devid(sd_ssc_t *ssc);
1251 static ddi_devid_t sd_create_devid(sd_ssc_t *ssc);
1252 static int  sd_write_deviceid(sd_ssc_t *ssc);
1253 static int  sd_get_devid_page(struct sd_lun *un, uchar_t *wwn, int *len);
1254 static int  sd_check_vpd_page_support(sd_ssc_t *ssc);
1255 
1256 static void sd_setup_pm(sd_ssc_t *ssc, dev_info_t *devi);
1257 static void sd_create_pm_components(dev_info_t *devi, struct sd_lun *un);
1258 
1259 static int  sd_ddi_suspend(dev_info_t *devi);
1260 static int  sd_ddi_resume(dev_info_t *devi);
1261 static int  sd_pm_state_change(struct sd_lun *un, int level, int flag);
1262 static int  sdpower(dev_info_t *devi, int component, int level);
1263 
1264 static int  sdattach(dev_info_t *devi, ddi_attach_cmd_t cmd);
1265 static int  sddetach(dev_info_t *devi, ddi_detach_cmd_t cmd);
1266 static int  sd_unit_attach(dev_info_t *devi);
1267 static int  sd_unit_detach(dev_info_t *devi);
1268 
1269 static void sd_set_unit_attributes(struct sd_lun *un, dev_info_t *devi);
1270 static void sd_create_errstats(struct sd_lun *un, int instance);
1271 static void sd_set_errstats(struct sd_lun *un);
1272 static void sd_set_pstats(struct sd_lun *un);
1273 
1274 static int  sddump(dev_t dev, caddr_t addr, daddr_t blkno, int nblk);
1275 static int  sd_scsi_poll(struct sd_lun *un, struct scsi_pkt *pkt);
1276 static int  sd_send_polled_RQS(struct sd_lun *un);
1277 static int  sd_ddi_scsi_poll(struct scsi_pkt *pkt);
1278 
1279 #if (defined(__fibre))
1280 /*
1281  * Event callbacks (photon)
1282  */
1283 static void sd_init_event_callbacks(struct sd_lun *un);
1284 static void  sd_event_callback(dev_info_t *, ddi_eventcookie_t, void *, void *);
1285 #endif
1286 
1287 /*
1288  * Defines for sd_cache_control
1289  */
1290 
1291 #define	SD_CACHE_ENABLE		1
1292 #define	SD_CACHE_DISABLE	0
1293 #define	SD_CACHE_NOCHANGE	-1
1294 
1295 static int   sd_cache_control(sd_ssc_t *ssc, int rcd_flag, int wce_flag);
1296 static int   sd_get_write_cache_enabled(sd_ssc_t *ssc, int *is_enabled);
1297 static void  sd_get_nv_sup(sd_ssc_t *ssc);
1298 static dev_t sd_make_device(dev_info_t *devi);
1299 static void  sd_check_solid_state(sd_ssc_t *ssc);
1300 static void  sd_check_emulation_mode(sd_ssc_t *ssc);
1301 static void  sd_update_block_info(struct sd_lun *un, uint32_t lbasize,
1302 	uint64_t capacity);
1303 
1304 /*
1305  * Driver entry point functions.
1306  */
1307 static int  sdopen(dev_t *dev_p, int flag, int otyp, cred_t *cred_p);
1308 static int  sdclose(dev_t dev, int flag, int otyp, cred_t *cred_p);
1309 static int  sd_ready_and_valid(sd_ssc_t *ssc, int part);
1310 
1311 static void sdmin(struct buf *bp);
1312 static int sdread(dev_t dev, struct uio *uio, cred_t *cred_p);
1313 static int sdwrite(dev_t dev, struct uio *uio, cred_t *cred_p);
1314 static int sdaread(dev_t dev, struct aio_req *aio, cred_t *cred_p);
1315 static int sdawrite(dev_t dev, struct aio_req *aio, cred_t *cred_p);
1316 
1317 static int sdstrategy(struct buf *bp);
1318 static int sdioctl(dev_t, int, intptr_t, int, cred_t *, int *);
1319 
1320 /*
1321  * Function prototypes for layering functions in the iostart chain.
1322  */
1323 static void sd_mapblockaddr_iostart(int index, struct sd_lun *un,
1324 	struct buf *bp);
1325 static void sd_mapblocksize_iostart(int index, struct sd_lun *un,
1326 	struct buf *bp);
1327 static void sd_checksum_iostart(int index, struct sd_lun *un, struct buf *bp);
1328 static void sd_checksum_uscsi_iostart(int index, struct sd_lun *un,
1329 	struct buf *bp);
1330 static void sd_pm_iostart(int index, struct sd_lun *un, struct buf *bp);
1331 static void sd_core_iostart(int index, struct sd_lun *un, struct buf *bp);
1332 
1333 /*
1334  * Function prototypes for layering functions in the iodone chain.
1335  */
1336 static void sd_buf_iodone(int index, struct sd_lun *un, struct buf *bp);
1337 static void sd_uscsi_iodone(int index, struct sd_lun *un, struct buf *bp);
1338 static void sd_mapblockaddr_iodone(int index, struct sd_lun *un,
1339 	struct buf *bp);
1340 static void sd_mapblocksize_iodone(int index, struct sd_lun *un,
1341 	struct buf *bp);
1342 static void sd_checksum_iodone(int index, struct sd_lun *un, struct buf *bp);
1343 static void sd_checksum_uscsi_iodone(int index, struct sd_lun *un,
1344 	struct buf *bp);
1345 static void sd_pm_iodone(int index, struct sd_lun *un, struct buf *bp);
1346 
1347 /*
1348  * Prototypes for functions to support buf(9S) based IO.
1349  */
1350 static void sd_xbuf_strategy(struct buf *bp, ddi_xbuf_t xp, void *arg);
1351 static int sd_initpkt_for_buf(struct buf *, struct scsi_pkt **);
1352 static void sd_destroypkt_for_buf(struct buf *);
1353 static int sd_setup_rw_pkt(struct sd_lun *un, struct scsi_pkt **pktpp,
1354 	struct buf *bp, int flags,
1355 	int (*callback)(caddr_t), caddr_t callback_arg,
1356 	diskaddr_t lba, uint32_t blockcount);
1357 static int sd_setup_next_rw_pkt(struct sd_lun *un, struct scsi_pkt *pktp,
1358 	struct buf *bp, diskaddr_t lba, uint32_t blockcount);
1359 
1360 /*
1361  * Prototypes for functions to support USCSI IO.
1362  */
1363 static int sd_uscsi_strategy(struct buf *bp);
1364 static int sd_initpkt_for_uscsi(struct buf *, struct scsi_pkt **);
1365 static void sd_destroypkt_for_uscsi(struct buf *);
1366 
1367 static void sd_xbuf_init(struct sd_lun *un, struct buf *bp, struct sd_xbuf *xp,
1368 	uchar_t chain_type, void *pktinfop);
1369 
1370 static int  sd_pm_entry(struct sd_lun *un);
1371 static void sd_pm_exit(struct sd_lun *un);
1372 
1373 static void sd_pm_idletimeout_handler(void *arg);
1374 
1375 /*
1376  * sd_core internal functions (used at the sd_core_io layer).
1377  */
1378 static void sd_add_buf_to_waitq(struct sd_lun *un, struct buf *bp);
1379 static void sdintr(struct scsi_pkt *pktp);
1380 static void sd_start_cmds(struct sd_lun *un, struct buf *immed_bp);
1381 
1382 static int sd_send_scsi_cmd(dev_t dev, struct uscsi_cmd *incmd, int flag,
1383 	enum uio_seg dataspace, int path_flag);
1384 
1385 static struct buf *sd_bioclone_alloc(struct buf *bp, size_t datalen,
1386 	daddr_t blkno, int (*func)(struct buf *));
1387 static struct buf *sd_shadow_buf_alloc(struct buf *bp, size_t datalen,
1388 	uint_t bflags, daddr_t blkno, int (*func)(struct buf *));
1389 static void sd_bioclone_free(struct buf *bp);
1390 static void sd_shadow_buf_free(struct buf *bp);
1391 
1392 static void sd_print_transport_rejected_message(struct sd_lun *un,
1393 	struct sd_xbuf *xp, int code);
1394 static void sd_print_incomplete_msg(struct sd_lun *un, struct buf *bp,
1395     void *arg, int code);
1396 static void sd_print_sense_failed_msg(struct sd_lun *un, struct buf *bp,
1397     void *arg, int code);
1398 static void sd_print_cmd_incomplete_msg(struct sd_lun *un, struct buf *bp,
1399     void *arg, int code);
1400 
1401 static void sd_retry_command(struct sd_lun *un, struct buf *bp,
1402 	int retry_check_flag,
1403 	void (*user_funcp)(struct sd_lun *un, struct buf *bp, void *argp,
1404 		int c),
1405 	void *user_arg, int failure_code,  clock_t retry_delay,
1406 	void (*statp)(kstat_io_t *));
1407 
1408 static void sd_set_retry_bp(struct sd_lun *un, struct buf *bp,
1409 	clock_t retry_delay, void (*statp)(kstat_io_t *));
1410 
1411 static void sd_send_request_sense_command(struct sd_lun *un, struct buf *bp,
1412 	struct scsi_pkt *pktp);
1413 static void sd_start_retry_command(void *arg);
1414 static void sd_start_direct_priority_command(void *arg);
1415 static void sd_return_failed_command(struct sd_lun *un, struct buf *bp,
1416 	int errcode);
1417 static void sd_return_failed_command_no_restart(struct sd_lun *un,
1418 	struct buf *bp, int errcode);
1419 static void sd_return_command(struct sd_lun *un, struct buf *bp);
1420 static void sd_sync_with_callback(struct sd_lun *un);
1421 static int sdrunout(caddr_t arg);
1422 
1423 static void sd_mark_rqs_busy(struct sd_lun *un, struct buf *bp);
1424 static struct buf *sd_mark_rqs_idle(struct sd_lun *un, struct sd_xbuf *xp);
1425 
1426 static void sd_reduce_throttle(struct sd_lun *un, int throttle_type);
1427 static void sd_restore_throttle(void *arg);
1428 
1429 static void sd_init_cdb_limits(struct sd_lun *un);
1430 
1431 static void sd_pkt_status_good(struct sd_lun *un, struct buf *bp,
1432 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1433 
1434 /*
1435  * Error handling functions
1436  */
1437 static void sd_pkt_status_check_condition(struct sd_lun *un, struct buf *bp,
1438 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1439 static void sd_pkt_status_busy(struct sd_lun *un, struct buf *bp,
1440 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1441 static void sd_pkt_status_reservation_conflict(struct sd_lun *un,
1442 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1443 static void sd_pkt_status_qfull(struct sd_lun *un, struct buf *bp,
1444 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1445 
1446 static void sd_handle_request_sense(struct sd_lun *un, struct buf *bp,
1447 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1448 static void sd_handle_auto_request_sense(struct sd_lun *un, struct buf *bp,
1449 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1450 static int sd_validate_sense_data(struct sd_lun *un, struct buf *bp,
1451 	struct sd_xbuf *xp, size_t actual_len);
1452 static void sd_decode_sense(struct sd_lun *un, struct buf *bp,
1453 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1454 
1455 static void sd_print_sense_msg(struct sd_lun *un, struct buf *bp,
1456 	void *arg, int code);
1457 
1458 static void sd_sense_key_no_sense(struct sd_lun *un, struct buf *bp,
1459 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1460 static void sd_sense_key_recoverable_error(struct sd_lun *un,
1461 	uint8_t *sense_datap,
1462 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1463 static void sd_sense_key_not_ready(struct sd_lun *un,
1464 	uint8_t *sense_datap,
1465 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1466 static void sd_sense_key_medium_or_hardware_error(struct sd_lun *un,
1467 	uint8_t *sense_datap,
1468 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1469 static void sd_sense_key_illegal_request(struct sd_lun *un, struct buf *bp,
1470 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1471 static void sd_sense_key_unit_attention(struct sd_lun *un,
1472 	uint8_t *sense_datap,
1473 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1474 static void sd_sense_key_fail_command(struct sd_lun *un, struct buf *bp,
1475 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1476 static void sd_sense_key_blank_check(struct sd_lun *un, struct buf *bp,
1477 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1478 static void sd_sense_key_aborted_command(struct sd_lun *un, struct buf *bp,
1479 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1480 static void sd_sense_key_default(struct sd_lun *un,
1481 	uint8_t *sense_datap,
1482 	struct buf *bp, struct sd_xbuf *xp, struct scsi_pkt *pktp);
1483 
1484 static void sd_print_retry_msg(struct sd_lun *un, struct buf *bp,
1485 	void *arg, int flag);
1486 
1487 static void sd_pkt_reason_cmd_incomplete(struct sd_lun *un, struct buf *bp,
1488 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1489 static void sd_pkt_reason_cmd_tran_err(struct sd_lun *un, struct buf *bp,
1490 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1491 static void sd_pkt_reason_cmd_reset(struct sd_lun *un, struct buf *bp,
1492 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1493 static void sd_pkt_reason_cmd_aborted(struct sd_lun *un, struct buf *bp,
1494 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1495 static void sd_pkt_reason_cmd_timeout(struct sd_lun *un, struct buf *bp,
1496 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1497 static void sd_pkt_reason_cmd_unx_bus_free(struct sd_lun *un, struct buf *bp,
1498 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1499 static void sd_pkt_reason_cmd_tag_reject(struct sd_lun *un, struct buf *bp,
1500 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1501 static void sd_pkt_reason_default(struct sd_lun *un, struct buf *bp,
1502 	struct sd_xbuf *xp, struct scsi_pkt *pktp);
1503 
1504 static void sd_reset_target(struct sd_lun *un, struct scsi_pkt *pktp);
1505 
1506 static void sd_start_stop_unit_callback(void *arg);
1507 static void sd_start_stop_unit_task(void *arg);
1508 
1509 static void sd_taskq_create(void);
1510 static void sd_taskq_delete(void);
1511 static void sd_target_change_task(void *arg);
1512 static void sd_log_dev_status_event(struct sd_lun *un, char *esc, int km_flag);
1513 static void sd_log_lun_expansion_event(struct sd_lun *un, int km_flag);
1514 static void sd_log_eject_request_event(struct sd_lun *un, int km_flag);
1515 static void sd_media_change_task(void *arg);
1516 
1517 static int sd_handle_mchange(struct sd_lun *un);
1518 static int sd_send_scsi_DOORLOCK(sd_ssc_t *ssc, int flag, int path_flag);
1519 static int sd_send_scsi_READ_CAPACITY(sd_ssc_t *ssc, uint64_t *capp,
1520 	uint32_t *lbap, int path_flag);
1521 static int sd_send_scsi_READ_CAPACITY_16(sd_ssc_t *ssc, uint64_t *capp,
1522 	uint32_t *lbap, uint32_t *psp, int path_flag);
1523 static int sd_send_scsi_START_STOP_UNIT(sd_ssc_t *ssc, int pc_flag,
1524 	int flag, int path_flag);
1525 static int sd_send_scsi_INQUIRY(sd_ssc_t *ssc, uchar_t *bufaddr,
1526 	size_t buflen, uchar_t evpd, uchar_t page_code, size_t *residp);
1527 static int sd_send_scsi_TEST_UNIT_READY(sd_ssc_t *ssc, int flag);
1528 static int sd_send_scsi_PERSISTENT_RESERVE_IN(sd_ssc_t *ssc,
1529 	uchar_t usr_cmd, uint16_t data_len, uchar_t *data_bufp);
1530 static int sd_send_scsi_PERSISTENT_RESERVE_OUT(sd_ssc_t *ssc,
1531 	uchar_t usr_cmd, uchar_t *usr_bufp);
1532 static int sd_send_scsi_SYNCHRONIZE_CACHE(struct sd_lun *un,
1533 	struct dk_callback *dkc);
1534 static int sd_send_scsi_SYNCHRONIZE_CACHE_biodone(struct buf *bp);
1535 static int sd_send_scsi_GET_CONFIGURATION(sd_ssc_t *ssc,
1536 	struct uscsi_cmd *ucmdbuf, uchar_t *rqbuf, uint_t rqbuflen,
1537 	uchar_t *bufaddr, uint_t buflen, int path_flag);
1538 static int sd_send_scsi_feature_GET_CONFIGURATION(sd_ssc_t *ssc,
1539 	struct uscsi_cmd *ucmdbuf, uchar_t *rqbuf, uint_t rqbuflen,
1540 	uchar_t *bufaddr, uint_t buflen, char feature, int path_flag);
1541 static int sd_send_scsi_MODE_SENSE(sd_ssc_t *ssc, int cdbsize,
1542 	uchar_t *bufaddr, size_t buflen, uchar_t page_code, int path_flag);
1543 static int sd_send_scsi_MODE_SELECT(sd_ssc_t *ssc, int cdbsize,
1544 	uchar_t *bufaddr, size_t buflen, uchar_t save_page, int path_flag);
1545 static int sd_send_scsi_RDWR(sd_ssc_t *ssc, uchar_t cmd, void *bufaddr,
1546 	size_t buflen, daddr_t start_block, int path_flag);
1547 #define	sd_send_scsi_READ(ssc, bufaddr, buflen, start_block, path_flag)	\
1548 	sd_send_scsi_RDWR(ssc, SCMD_READ, bufaddr, buflen, start_block, \
1549 	path_flag)
1550 #define	sd_send_scsi_WRITE(ssc, bufaddr, buflen, start_block, path_flag)\
1551 	sd_send_scsi_RDWR(ssc, SCMD_WRITE, bufaddr, buflen, start_block,\
1552 	path_flag)
1553 
1554 static int sd_send_scsi_LOG_SENSE(sd_ssc_t *ssc, uchar_t *bufaddr,
1555 	uint16_t buflen, uchar_t page_code, uchar_t page_control,
1556 	uint16_t param_ptr, int path_flag);
1557 static int sd_send_scsi_GET_EVENT_STATUS_NOTIFICATION(sd_ssc_t *ssc,
1558 	uchar_t *bufaddr, size_t buflen, uchar_t class_req);
1559 static boolean_t sd_gesn_media_data_valid(uchar_t *data);
1560 
1561 static int  sd_alloc_rqs(struct scsi_device *devp, struct sd_lun *un);
1562 static void sd_free_rqs(struct sd_lun *un);
1563 
1564 static void sd_dump_memory(struct sd_lun *un, uint_t comp, char *title,
1565 	uchar_t *data, int len, int fmt);
1566 static void sd_panic_for_res_conflict(struct sd_lun *un);
1567 
1568 /*
1569  * Disk Ioctl Function Prototypes
1570  */
1571 static int sd_get_media_info(dev_t dev, caddr_t arg, int flag);
1572 static int sd_get_media_info_ext(dev_t dev, caddr_t arg, int flag);
1573 static int sd_dkio_ctrl_info(dev_t dev, caddr_t arg, int flag);
1574 static int sd_dkio_get_temp(dev_t dev, caddr_t arg, int flag);
1575 
1576 /*
1577  * Multi-host Ioctl Prototypes
1578  */
1579 static int sd_check_mhd(dev_t dev, int interval);
1580 static int sd_mhd_watch_cb(caddr_t arg, struct scsi_watch_result *resultp);
1581 static void sd_mhd_watch_incomplete(struct sd_lun *un, struct scsi_pkt *pkt);
1582 static char *sd_sname(uchar_t status);
1583 static void sd_mhd_resvd_recover(void *arg);
1584 static void sd_resv_reclaim_thread();
1585 static int sd_take_ownership(dev_t dev, struct mhioctkown *p);
1586 static int sd_reserve_release(dev_t dev, int cmd);
1587 static void sd_rmv_resv_reclaim_req(dev_t dev);
1588 static void sd_mhd_reset_notify_cb(caddr_t arg);
1589 static int sd_persistent_reservation_in_read_keys(struct sd_lun *un,
1590 	mhioc_inkeys_t *usrp, int flag);
1591 static int sd_persistent_reservation_in_read_resv(struct sd_lun *un,
1592 	mhioc_inresvs_t *usrp, int flag);
1593 static int sd_mhdioc_takeown(dev_t dev, caddr_t arg, int flag);
1594 static int sd_mhdioc_failfast(dev_t dev, caddr_t arg, int flag);
1595 static int sd_mhdioc_release(dev_t dev);
1596 static int sd_mhdioc_register_devid(dev_t dev);
1597 static int sd_mhdioc_inkeys(dev_t dev, caddr_t arg, int flag);
1598 static int sd_mhdioc_inresv(dev_t dev, caddr_t arg, int flag);
1599 
1600 /*
1601  * SCSI removable prototypes
1602  */
1603 static int sr_change_blkmode(dev_t dev, int cmd, intptr_t data, int flag);
1604 static int sr_change_speed(dev_t dev, int cmd, intptr_t data, int flag);
1605 static int sr_atapi_change_speed(dev_t dev, int cmd, intptr_t data, int flag);
1606 static int sr_pause_resume(dev_t dev, int mode);
1607 static int sr_play_msf(dev_t dev, caddr_t data, int flag);
1608 static int sr_play_trkind(dev_t dev, caddr_t data, int flag);
1609 static int sr_read_all_subcodes(dev_t dev, caddr_t data, int flag);
1610 static int sr_read_subchannel(dev_t dev, caddr_t data, int flag);
1611 static int sr_read_tocentry(dev_t dev, caddr_t data, int flag);
1612 static int sr_read_tochdr(dev_t dev, caddr_t data, int flag);
1613 static int sr_read_cdda(dev_t dev, caddr_t data, int flag);
1614 static int sr_read_cdxa(dev_t dev, caddr_t data, int flag);
1615 static int sr_read_mode1(dev_t dev, caddr_t data, int flag);
1616 static int sr_read_mode2(dev_t dev, caddr_t data, int flag);
1617 static int sr_read_cd_mode2(dev_t dev, caddr_t data, int flag);
1618 static int sr_sector_mode(dev_t dev, uint32_t blksize);
1619 static int sr_eject(dev_t dev);
1620 static void sr_ejected(register struct sd_lun *un);
1621 static int sr_check_wp(dev_t dev);
1622 static opaque_t sd_watch_request_submit(struct sd_lun *un);
1623 static int sd_check_media(dev_t dev, enum dkio_state state);
1624 static int sd_media_watch_cb(caddr_t arg, struct scsi_watch_result *resultp);
1625 static void sd_delayed_cv_broadcast(void *arg);
1626 static int sr_volume_ctrl(dev_t dev, caddr_t data, int flag);
1627 static int sr_read_sony_session_offset(dev_t dev, caddr_t data, int flag);
1628 
1629 static int sd_log_page_supported(sd_ssc_t *ssc, int log_page);
1630 
1631 /*
1632  * Function Prototype for the non-512 support (DVDRAM, MO etc.) functions.
1633  */
1634 static void sd_check_for_writable_cd(sd_ssc_t *ssc, int path_flag);
1635 static int sd_wm_cache_constructor(void *wm, void *un, int flags);
1636 static void sd_wm_cache_destructor(void *wm, void *un);
1637 static struct sd_w_map *sd_range_lock(struct sd_lun *un, daddr_t startb,
1638 	daddr_t endb, ushort_t typ);
1639 static struct sd_w_map *sd_get_range(struct sd_lun *un, daddr_t startb,
1640 	daddr_t endb);
1641 static void sd_free_inlist_wmap(struct sd_lun *un, struct sd_w_map *wmp);
1642 static void sd_range_unlock(struct sd_lun *un, struct sd_w_map *wm);
1643 static void sd_read_modify_write_task(void * arg);
1644 static int
1645 sddump_do_read_of_rmw(struct sd_lun *un, uint64_t blkno, uint64_t nblk,
1646 	struct buf **bpp);
1647 
1648 
1649 /*
1650  * Function prototypes for failfast support.
1651  */
1652 static void sd_failfast_flushq(struct sd_lun *un);
1653 static int sd_failfast_flushq_callback(struct buf *bp);
1654 
1655 /*
1656  * Function prototypes to check for lsi devices
1657  */
1658 static void sd_is_lsi(struct sd_lun *un);
1659 
1660 /*
1661  * Function prototypes for partial DMA support
1662  */
1663 static int sd_setup_next_xfer(struct sd_lun *un, struct buf *bp,
1664 		struct scsi_pkt *pkt, struct sd_xbuf *xp);
1665 
1666 
1667 /* Function prototypes for cmlb */
1668 static int sd_tg_rdwr(dev_info_t *devi, uchar_t cmd, void *bufaddr,
1669     diskaddr_t start_block, size_t reqlength, void *tg_cookie);
1670 
1671 static int sd_tg_getinfo(dev_info_t *devi, int cmd, void *arg, void *tg_cookie);
1672 
1673 /*
1674  * For printing RMW warning message timely
1675  */
1676 static void sd_rmw_msg_print_handler(void *arg);
1677 
1678 /*
1679  * Constants for failfast support:
1680  *
1681  * SD_FAILFAST_INACTIVE: Instance is currently in a normal state, with NO
1682  * failfast processing being performed.
1683  *
1684  * SD_FAILFAST_ACTIVE: Instance is in the failfast state and is performing
1685  * failfast processing on all bufs with B_FAILFAST set.
1686  */
1687 
1688 #define	SD_FAILFAST_INACTIVE		0
1689 #define	SD_FAILFAST_ACTIVE		1
1690 
1691 /*
1692  * Bitmask to control behavior of buf(9S) flushes when a transition to
1693  * the failfast state occurs. Optional bits include:
1694  *
1695  * SD_FAILFAST_FLUSH_ALL_BUFS: When set, flush ALL bufs including those that
1696  * do NOT have B_FAILFAST set. When clear, only bufs with B_FAILFAST will
1697  * be flushed.
1698  *
1699  * SD_FAILFAST_FLUSH_ALL_QUEUES: When set, flush any/all other queues in the
1700  * driver, in addition to the regular wait queue. This includes the xbuf
1701  * queues. When clear, only the driver's wait queue will be flushed.
1702  */
1703 #define	SD_FAILFAST_FLUSH_ALL_BUFS	0x01
1704 #define	SD_FAILFAST_FLUSH_ALL_QUEUES	0x02
1705 
1706 /*
1707  * The default behavior is to only flush bufs that have B_FAILFAST set, but
1708  * to flush all queues within the driver.
1709  */
1710 static int sd_failfast_flushctl = SD_FAILFAST_FLUSH_ALL_QUEUES;
1711 
1712 
1713 /*
1714  * SD Testing Fault Injection
1715  */
1716 #ifdef SD_FAULT_INJECTION
1717 static void sd_faultinjection_ioctl(int cmd, intptr_t arg, struct sd_lun *un);
1718 static void sd_faultinjection(struct scsi_pkt *pktp);
1719 static void sd_injection_log(char *buf, struct sd_lun *un);
1720 #endif
1721 
1722 /*
1723  * Device driver ops vector
1724  */
1725 static struct cb_ops sd_cb_ops = {
1726 	sdopen,			/* open */
1727 	sdclose,		/* close */
1728 	sdstrategy,		/* strategy */
1729 	nodev,			/* print */
1730 	sddump,			/* dump */
1731 	sdread,			/* read */
1732 	sdwrite,		/* write */
1733 	sdioctl,		/* ioctl */
1734 	nodev,			/* devmap */
1735 	nodev,			/* mmap */
1736 	nodev,			/* segmap */
1737 	nochpoll,		/* poll */
1738 	sd_prop_op,		/* cb_prop_op */
1739 	0,			/* streamtab  */
1740 	D_64BIT | D_MP | D_NEW | D_HOTPLUG, /* Driver compatibility flags */
1741 	CB_REV,			/* cb_rev */
1742 	sdaread, 		/* async I/O read entry point */
1743 	sdawrite		/* async I/O write entry point */
1744 };
1745 
1746 struct dev_ops sd_ops = {
1747 	DEVO_REV,		/* devo_rev, */
1748 	0,			/* refcnt  */
1749 	sdinfo,			/* info */
1750 	nulldev,		/* identify */
1751 	sdprobe,		/* probe */
1752 	sdattach,		/* attach */
1753 	sddetach,		/* detach */
1754 	nodev,			/* reset */
1755 	&sd_cb_ops,		/* driver operations */
1756 	NULL,			/* bus operations */
1757 	sdpower,		/* power */
1758 	ddi_quiesce_not_needed,		/* quiesce */
1759 };
1760 
1761 /*
1762  * This is the loadable module wrapper.
1763  */
1764 #include <sys/modctl.h>
1765 
1766 #ifndef XPV_HVM_DRIVER
1767 static struct modldrv modldrv = {
1768 	&mod_driverops,		/* Type of module. This one is a driver */
1769 	SD_MODULE_NAME,		/* Module name. */
1770 	&sd_ops			/* driver ops */
1771 };
1772 
1773 static struct modlinkage modlinkage = {
1774 	MODREV_1, &modldrv, NULL
1775 };
1776 
1777 #else /* XPV_HVM_DRIVER */
1778 static struct modlmisc modlmisc = {
1779 	&mod_miscops,		/* Type of module. This one is a misc */
1780 	"HVM " SD_MODULE_NAME,		/* Module name. */
1781 };
1782 
1783 static struct modlinkage modlinkage = {
1784 	MODREV_1, &modlmisc, NULL
1785 };
1786 
1787 #endif /* XPV_HVM_DRIVER */
1788 
1789 static cmlb_tg_ops_t sd_tgops = {
1790 	TG_DK_OPS_VERSION_1,
1791 	sd_tg_rdwr,
1792 	sd_tg_getinfo
1793 };
1794 
1795 static struct scsi_asq_key_strings sd_additional_codes[] = {
1796 	0x81, 0, "Logical Unit is Reserved",
1797 	0x85, 0, "Audio Address Not Valid",
1798 	0xb6, 0, "Media Load Mechanism Failed",
1799 	0xB9, 0, "Audio Play Operation Aborted",
1800 	0xbf, 0, "Buffer Overflow for Read All Subcodes Command",
1801 	0x53, 2, "Medium removal prevented",
1802 	0x6f, 0, "Authentication failed during key exchange",
1803 	0x6f, 1, "Key not present",
1804 	0x6f, 2, "Key not established",
1805 	0x6f, 3, "Read without proper authentication",
1806 	0x6f, 4, "Mismatched region to this logical unit",
1807 	0x6f, 5, "Region reset count error",
1808 	0xffff, 0x0, NULL
1809 };
1810 
1811 
1812 /*
1813  * Struct for passing printing information for sense data messages
1814  */
1815 struct sd_sense_info {
1816 	int	ssi_severity;
1817 	int	ssi_pfa_flag;
1818 };
1819 
1820 /*
1821  * Table of function pointers for iostart-side routines. Separate "chains"
1822  * of layered function calls are formed by placing the function pointers
1823  * sequentially in the desired order. Functions are called according to an
1824  * incrementing table index ordering. The last function in each chain must
1825  * be sd_core_iostart(). The corresponding iodone-side routines are expected
1826  * in the sd_iodone_chain[] array.
1827  *
1828  * Note: It may seem more natural to organize both the iostart and iodone
1829  * functions together, into an array of structures (or some similar
1830  * organization) with a common index, rather than two separate arrays which
1831  * must be maintained in synchronization. The purpose of this division is
1832  * to achieve improved performance: individual arrays allows for more
1833  * effective cache line utilization on certain platforms.
1834  */
1835 
1836 typedef void (*sd_chain_t)(int index, struct sd_lun *un, struct buf *bp);
1837 
1838 
1839 static sd_chain_t sd_iostart_chain[] = {
1840 
1841 	/* Chain for buf IO for disk drive targets (PM enabled) */
1842 	sd_mapblockaddr_iostart,	/* Index: 0 */
1843 	sd_pm_iostart,			/* Index: 1 */
1844 	sd_core_iostart,		/* Index: 2 */
1845 
1846 	/* Chain for buf IO for disk drive targets (PM disabled) */
1847 	sd_mapblockaddr_iostart,	/* Index: 3 */
1848 	sd_core_iostart,		/* Index: 4 */
1849 
1850 	/*
1851 	 * Chain for buf IO for removable-media or large sector size
1852 	 * disk drive targets with RMW needed (PM enabled)
1853 	 */
1854 	sd_mapblockaddr_iostart,	/* Index: 5 */
1855 	sd_mapblocksize_iostart,	/* Index: 6 */
1856 	sd_pm_iostart,			/* Index: 7 */
1857 	sd_core_iostart,		/* Index: 8 */
1858 
1859 	/*
1860 	 * Chain for buf IO for removable-media or large sector size
1861 	 * disk drive targets with RMW needed (PM disabled)
1862 	 */
1863 	sd_mapblockaddr_iostart,	/* Index: 9 */
1864 	sd_mapblocksize_iostart,	/* Index: 10 */
1865 	sd_core_iostart,		/* Index: 11 */
1866 
1867 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
1868 	sd_mapblockaddr_iostart,	/* Index: 12 */
1869 	sd_checksum_iostart,		/* Index: 13 */
1870 	sd_pm_iostart,			/* Index: 14 */
1871 	sd_core_iostart,		/* Index: 15 */
1872 
1873 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
1874 	sd_mapblockaddr_iostart,	/* Index: 16 */
1875 	sd_checksum_iostart,		/* Index: 17 */
1876 	sd_core_iostart,		/* Index: 18 */
1877 
1878 	/* Chain for USCSI commands (all targets) */
1879 	sd_pm_iostart,			/* Index: 19 */
1880 	sd_core_iostart,		/* Index: 20 */
1881 
1882 	/* Chain for checksumming USCSI commands (all targets) */
1883 	sd_checksum_uscsi_iostart,	/* Index: 21 */
1884 	sd_pm_iostart,			/* Index: 22 */
1885 	sd_core_iostart,		/* Index: 23 */
1886 
1887 	/* Chain for "direct" USCSI commands (all targets) */
1888 	sd_core_iostart,		/* Index: 24 */
1889 
1890 	/* Chain for "direct priority" USCSI commands (all targets) */
1891 	sd_core_iostart,		/* Index: 25 */
1892 
1893 	/*
1894 	 * Chain for buf IO for large sector size disk drive targets
1895 	 * with RMW needed with checksumming (PM enabled)
1896 	 */
1897 	sd_mapblockaddr_iostart,	/* Index: 26 */
1898 	sd_mapblocksize_iostart,	/* Index: 27 */
1899 	sd_checksum_iostart,		/* Index: 28 */
1900 	sd_pm_iostart,			/* Index: 29 */
1901 	sd_core_iostart,		/* Index: 30 */
1902 
1903 	/*
1904 	 * Chain for buf IO for large sector size disk drive targets
1905 	 * with RMW needed with checksumming (PM disabled)
1906 	 */
1907 	sd_mapblockaddr_iostart,	/* Index: 31 */
1908 	sd_mapblocksize_iostart,	/* Index: 32 */
1909 	sd_checksum_iostart,		/* Index: 33 */
1910 	sd_core_iostart,		/* Index: 34 */
1911 
1912 };
1913 
1914 /*
1915  * Macros to locate the first function of each iostart chain in the
1916  * sd_iostart_chain[] array. These are located by the index in the array.
1917  */
1918 #define	SD_CHAIN_DISK_IOSTART			0
1919 #define	SD_CHAIN_DISK_IOSTART_NO_PM		3
1920 #define	SD_CHAIN_MSS_DISK_IOSTART		5
1921 #define	SD_CHAIN_RMMEDIA_IOSTART		5
1922 #define	SD_CHAIN_MSS_DISK_IOSTART_NO_PM		9
1923 #define	SD_CHAIN_RMMEDIA_IOSTART_NO_PM		9
1924 #define	SD_CHAIN_CHKSUM_IOSTART			12
1925 #define	SD_CHAIN_CHKSUM_IOSTART_NO_PM		16
1926 #define	SD_CHAIN_USCSI_CMD_IOSTART		19
1927 #define	SD_CHAIN_USCSI_CHKSUM_IOSTART		21
1928 #define	SD_CHAIN_DIRECT_CMD_IOSTART		24
1929 #define	SD_CHAIN_PRIORITY_CMD_IOSTART		25
1930 #define	SD_CHAIN_MSS_CHKSUM_IOSTART		26
1931 #define	SD_CHAIN_MSS_CHKSUM_IOSTART_NO_PM	31
1932 
1933 
1934 /*
1935  * Table of function pointers for the iodone-side routines for the driver-
1936  * internal layering mechanism.  The calling sequence for iodone routines
1937  * uses a decrementing table index, so the last routine called in a chain
1938  * must be at the lowest array index location for that chain.  The last
1939  * routine for each chain must be either sd_buf_iodone() (for buf(9S) IOs)
1940  * or sd_uscsi_iodone() (for uscsi IOs).  Other than this, the ordering
1941  * of the functions in an iodone side chain must correspond to the ordering
1942  * of the iostart routines for that chain.  Note that there is no iodone
1943  * side routine that corresponds to sd_core_iostart(), so there is no
1944  * entry in the table for this.
1945  */
1946 
1947 static sd_chain_t sd_iodone_chain[] = {
1948 
1949 	/* Chain for buf IO for disk drive targets (PM enabled) */
1950 	sd_buf_iodone,			/* Index: 0 */
1951 	sd_mapblockaddr_iodone,		/* Index: 1 */
1952 	sd_pm_iodone,			/* Index: 2 */
1953 
1954 	/* Chain for buf IO for disk drive targets (PM disabled) */
1955 	sd_buf_iodone,			/* Index: 3 */
1956 	sd_mapblockaddr_iodone,		/* Index: 4 */
1957 
1958 	/*
1959 	 * Chain for buf IO for removable-media or large sector size
1960 	 * disk drive targets with RMW needed (PM enabled)
1961 	 */
1962 	sd_buf_iodone,			/* Index: 5 */
1963 	sd_mapblockaddr_iodone,		/* Index: 6 */
1964 	sd_mapblocksize_iodone,		/* Index: 7 */
1965 	sd_pm_iodone,			/* Index: 8 */
1966 
1967 	/*
1968 	 * Chain for buf IO for removable-media or large sector size
1969 	 * disk drive targets with RMW needed (PM disabled)
1970 	 */
1971 	sd_buf_iodone,			/* Index: 9 */
1972 	sd_mapblockaddr_iodone,		/* Index: 10 */
1973 	sd_mapblocksize_iodone,		/* Index: 11 */
1974 
1975 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
1976 	sd_buf_iodone,			/* Index: 12 */
1977 	sd_mapblockaddr_iodone,		/* Index: 13 */
1978 	sd_checksum_iodone,		/* Index: 14 */
1979 	sd_pm_iodone,			/* Index: 15 */
1980 
1981 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
1982 	sd_buf_iodone,			/* Index: 16 */
1983 	sd_mapblockaddr_iodone,		/* Index: 17 */
1984 	sd_checksum_iodone,		/* Index: 18 */
1985 
1986 	/* Chain for USCSI commands (non-checksum targets) */
1987 	sd_uscsi_iodone,		/* Index: 19 */
1988 	sd_pm_iodone,			/* Index: 20 */
1989 
1990 	/* Chain for USCSI commands (checksum targets) */
1991 	sd_uscsi_iodone,		/* Index: 21 */
1992 	sd_checksum_uscsi_iodone,	/* Index: 22 */
1993 	sd_pm_iodone,			/* Index: 22 */
1994 
1995 	/* Chain for "direct" USCSI commands (all targets) */
1996 	sd_uscsi_iodone,		/* Index: 24 */
1997 
1998 	/* Chain for "direct priority" USCSI commands (all targets) */
1999 	sd_uscsi_iodone,		/* Index: 25 */
2000 
2001 	/*
2002 	 * Chain for buf IO for large sector size disk drive targets
2003 	 * with checksumming (PM enabled)
2004 	 */
2005 	sd_buf_iodone,			/* Index: 26 */
2006 	sd_mapblockaddr_iodone,		/* Index: 27 */
2007 	sd_mapblocksize_iodone,		/* Index: 28 */
2008 	sd_checksum_iodone,		/* Index: 29 */
2009 	sd_pm_iodone,			/* Index: 30 */
2010 
2011 	/*
2012 	 * Chain for buf IO for large sector size disk drive targets
2013 	 * with checksumming (PM disabled)
2014 	 */
2015 	sd_buf_iodone,			/* Index: 31 */
2016 	sd_mapblockaddr_iodone,		/* Index: 32 */
2017 	sd_mapblocksize_iodone,		/* Index: 33 */
2018 	sd_checksum_iodone,		/* Index: 34 */
2019 };
2020 
2021 
2022 /*
2023  * Macros to locate the "first" function in the sd_iodone_chain[] array for
2024  * each iodone-side chain. These are located by the array index, but as the
2025  * iodone side functions are called in a decrementing-index order, the
2026  * highest index number in each chain must be specified (as these correspond
2027  * to the first function in the iodone chain that will be called by the core
2028  * at IO completion time).
2029  */
2030 
2031 #define	SD_CHAIN_DISK_IODONE			2
2032 #define	SD_CHAIN_DISK_IODONE_NO_PM		4
2033 #define	SD_CHAIN_RMMEDIA_IODONE			8
2034 #define	SD_CHAIN_MSS_DISK_IODONE		8
2035 #define	SD_CHAIN_RMMEDIA_IODONE_NO_PM		11
2036 #define	SD_CHAIN_MSS_DISK_IODONE_NO_PM		11
2037 #define	SD_CHAIN_CHKSUM_IODONE			15
2038 #define	SD_CHAIN_CHKSUM_IODONE_NO_PM		18
2039 #define	SD_CHAIN_USCSI_CMD_IODONE		20
2040 #define	SD_CHAIN_USCSI_CHKSUM_IODONE		22
2041 #define	SD_CHAIN_DIRECT_CMD_IODONE		24
2042 #define	SD_CHAIN_PRIORITY_CMD_IODONE		25
2043 #define	SD_CHAIN_MSS_CHKSUM_IODONE		30
2044 #define	SD_CHAIN_MSS_CHKSUM_IODONE_NO_PM	34
2045 
2046 
2047 
2048 /*
2049  * Array to map a layering chain index to the appropriate initpkt routine.
2050  * The redundant entries are present so that the index used for accessing
2051  * the above sd_iostart_chain and sd_iodone_chain tables can be used directly
2052  * with this table as well.
2053  */
2054 typedef int (*sd_initpkt_t)(struct buf *, struct scsi_pkt **);
2055 
2056 static sd_initpkt_t	sd_initpkt_map[] = {
2057 
2058 	/* Chain for buf IO for disk drive targets (PM enabled) */
2059 	sd_initpkt_for_buf,		/* Index: 0 */
2060 	sd_initpkt_for_buf,		/* Index: 1 */
2061 	sd_initpkt_for_buf,		/* Index: 2 */
2062 
2063 	/* Chain for buf IO for disk drive targets (PM disabled) */
2064 	sd_initpkt_for_buf,		/* Index: 3 */
2065 	sd_initpkt_for_buf,		/* Index: 4 */
2066 
2067 	/*
2068 	 * Chain for buf IO for removable-media or large sector size
2069 	 * disk drive targets (PM enabled)
2070 	 */
2071 	sd_initpkt_for_buf,		/* Index: 5 */
2072 	sd_initpkt_for_buf,		/* Index: 6 */
2073 	sd_initpkt_for_buf,		/* Index: 7 */
2074 	sd_initpkt_for_buf,		/* Index: 8 */
2075 
2076 	/*
2077 	 * Chain for buf IO for removable-media or large sector size
2078 	 * disk drive targets (PM disabled)
2079 	 */
2080 	sd_initpkt_for_buf,		/* Index: 9 */
2081 	sd_initpkt_for_buf,		/* Index: 10 */
2082 	sd_initpkt_for_buf,		/* Index: 11 */
2083 
2084 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
2085 	sd_initpkt_for_buf,		/* Index: 12 */
2086 	sd_initpkt_for_buf,		/* Index: 13 */
2087 	sd_initpkt_for_buf,		/* Index: 14 */
2088 	sd_initpkt_for_buf,		/* Index: 15 */
2089 
2090 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
2091 	sd_initpkt_for_buf,		/* Index: 16 */
2092 	sd_initpkt_for_buf,		/* Index: 17 */
2093 	sd_initpkt_for_buf,		/* Index: 18 */
2094 
2095 	/* Chain for USCSI commands (non-checksum targets) */
2096 	sd_initpkt_for_uscsi,		/* Index: 19 */
2097 	sd_initpkt_for_uscsi,		/* Index: 20 */
2098 
2099 	/* Chain for USCSI commands (checksum targets) */
2100 	sd_initpkt_for_uscsi,		/* Index: 21 */
2101 	sd_initpkt_for_uscsi,		/* Index: 22 */
2102 	sd_initpkt_for_uscsi,		/* Index: 22 */
2103 
2104 	/* Chain for "direct" USCSI commands (all targets) */
2105 	sd_initpkt_for_uscsi,		/* Index: 24 */
2106 
2107 	/* Chain for "direct priority" USCSI commands (all targets) */
2108 	sd_initpkt_for_uscsi,		/* Index: 25 */
2109 
2110 	/*
2111 	 * Chain for buf IO for large sector size disk drive targets
2112 	 * with checksumming (PM enabled)
2113 	 */
2114 	sd_initpkt_for_buf,		/* Index: 26 */
2115 	sd_initpkt_for_buf,		/* Index: 27 */
2116 	sd_initpkt_for_buf,		/* Index: 28 */
2117 	sd_initpkt_for_buf,		/* Index: 29 */
2118 	sd_initpkt_for_buf,		/* Index: 30 */
2119 
2120 	/*
2121 	 * Chain for buf IO for large sector size disk drive targets
2122 	 * with checksumming (PM disabled)
2123 	 */
2124 	sd_initpkt_for_buf,		/* Index: 31 */
2125 	sd_initpkt_for_buf,		/* Index: 32 */
2126 	sd_initpkt_for_buf,		/* Index: 33 */
2127 	sd_initpkt_for_buf,		/* Index: 34 */
2128 };
2129 
2130 
2131 /*
2132  * Array to map a layering chain index to the appropriate destroypktpkt routine.
2133  * The redundant entries are present so that the index used for accessing
2134  * the above sd_iostart_chain and sd_iodone_chain tables can be used directly
2135  * with this table as well.
2136  */
2137 typedef void (*sd_destroypkt_t)(struct buf *);
2138 
2139 static sd_destroypkt_t	sd_destroypkt_map[] = {
2140 
2141 	/* Chain for buf IO for disk drive targets (PM enabled) */
2142 	sd_destroypkt_for_buf,		/* Index: 0 */
2143 	sd_destroypkt_for_buf,		/* Index: 1 */
2144 	sd_destroypkt_for_buf,		/* Index: 2 */
2145 
2146 	/* Chain for buf IO for disk drive targets (PM disabled) */
2147 	sd_destroypkt_for_buf,		/* Index: 3 */
2148 	sd_destroypkt_for_buf,		/* Index: 4 */
2149 
2150 	/*
2151 	 * Chain for buf IO for removable-media or large sector size
2152 	 * disk drive targets (PM enabled)
2153 	 */
2154 	sd_destroypkt_for_buf,		/* Index: 5 */
2155 	sd_destroypkt_for_buf,		/* Index: 6 */
2156 	sd_destroypkt_for_buf,		/* Index: 7 */
2157 	sd_destroypkt_for_buf,		/* Index: 8 */
2158 
2159 	/*
2160 	 * Chain for buf IO for removable-media or large sector size
2161 	 * disk drive targets (PM disabled)
2162 	 */
2163 	sd_destroypkt_for_buf,		/* Index: 9 */
2164 	sd_destroypkt_for_buf,		/* Index: 10 */
2165 	sd_destroypkt_for_buf,		/* Index: 11 */
2166 
2167 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
2168 	sd_destroypkt_for_buf,		/* Index: 12 */
2169 	sd_destroypkt_for_buf,		/* Index: 13 */
2170 	sd_destroypkt_for_buf,		/* Index: 14 */
2171 	sd_destroypkt_for_buf,		/* Index: 15 */
2172 
2173 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
2174 	sd_destroypkt_for_buf,		/* Index: 16 */
2175 	sd_destroypkt_for_buf,		/* Index: 17 */
2176 	sd_destroypkt_for_buf,		/* Index: 18 */
2177 
2178 	/* Chain for USCSI commands (non-checksum targets) */
2179 	sd_destroypkt_for_uscsi,	/* Index: 19 */
2180 	sd_destroypkt_for_uscsi,	/* Index: 20 */
2181 
2182 	/* Chain for USCSI commands (checksum targets) */
2183 	sd_destroypkt_for_uscsi,	/* Index: 21 */
2184 	sd_destroypkt_for_uscsi,	/* Index: 22 */
2185 	sd_destroypkt_for_uscsi,	/* Index: 22 */
2186 
2187 	/* Chain for "direct" USCSI commands (all targets) */
2188 	sd_destroypkt_for_uscsi,	/* Index: 24 */
2189 
2190 	/* Chain for "direct priority" USCSI commands (all targets) */
2191 	sd_destroypkt_for_uscsi,	/* Index: 25 */
2192 
2193 	/*
2194 	 * Chain for buf IO for large sector size disk drive targets
2195 	 * with checksumming (PM disabled)
2196 	 */
2197 	sd_destroypkt_for_buf,		/* Index: 26 */
2198 	sd_destroypkt_for_buf,		/* Index: 27 */
2199 	sd_destroypkt_for_buf,		/* Index: 28 */
2200 	sd_destroypkt_for_buf,		/* Index: 29 */
2201 	sd_destroypkt_for_buf,		/* Index: 30 */
2202 
2203 	/*
2204 	 * Chain for buf IO for large sector size disk drive targets
2205 	 * with checksumming (PM enabled)
2206 	 */
2207 	sd_destroypkt_for_buf,		/* Index: 31 */
2208 	sd_destroypkt_for_buf,		/* Index: 32 */
2209 	sd_destroypkt_for_buf,		/* Index: 33 */
2210 	sd_destroypkt_for_buf,		/* Index: 34 */
2211 };
2212 
2213 
2214 
2215 /*
2216  * Array to map a layering chain index to the appropriate chain "type".
2217  * The chain type indicates a specific property/usage of the chain.
2218  * The redundant entries are present so that the index used for accessing
2219  * the above sd_iostart_chain and sd_iodone_chain tables can be used directly
2220  * with this table as well.
2221  */
2222 
2223 #define	SD_CHAIN_NULL			0	/* for the special RQS cmd */
2224 #define	SD_CHAIN_BUFIO			1	/* regular buf IO */
2225 #define	SD_CHAIN_USCSI			2	/* regular USCSI commands */
2226 #define	SD_CHAIN_DIRECT			3	/* uscsi, w/ bypass power mgt */
2227 #define	SD_CHAIN_DIRECT_PRIORITY	4	/* uscsi, w/ bypass power mgt */
2228 						/* (for error recovery) */
2229 
2230 static int sd_chain_type_map[] = {
2231 
2232 	/* Chain for buf IO for disk drive targets (PM enabled) */
2233 	SD_CHAIN_BUFIO,			/* Index: 0 */
2234 	SD_CHAIN_BUFIO,			/* Index: 1 */
2235 	SD_CHAIN_BUFIO,			/* Index: 2 */
2236 
2237 	/* Chain for buf IO for disk drive targets (PM disabled) */
2238 	SD_CHAIN_BUFIO,			/* Index: 3 */
2239 	SD_CHAIN_BUFIO,			/* Index: 4 */
2240 
2241 	/*
2242 	 * Chain for buf IO for removable-media or large sector size
2243 	 * disk drive targets (PM enabled)
2244 	 */
2245 	SD_CHAIN_BUFIO,			/* Index: 5 */
2246 	SD_CHAIN_BUFIO,			/* Index: 6 */
2247 	SD_CHAIN_BUFIO,			/* Index: 7 */
2248 	SD_CHAIN_BUFIO,			/* Index: 8 */
2249 
2250 	/*
2251 	 * Chain for buf IO for removable-media or large sector size
2252 	 * disk drive targets (PM disabled)
2253 	 */
2254 	SD_CHAIN_BUFIO,			/* Index: 9 */
2255 	SD_CHAIN_BUFIO,			/* Index: 10 */
2256 	SD_CHAIN_BUFIO,			/* Index: 11 */
2257 
2258 	/* Chain for buf IO for disk drives with checksumming (PM enabled) */
2259 	SD_CHAIN_BUFIO,			/* Index: 12 */
2260 	SD_CHAIN_BUFIO,			/* Index: 13 */
2261 	SD_CHAIN_BUFIO,			/* Index: 14 */
2262 	SD_CHAIN_BUFIO,			/* Index: 15 */
2263 
2264 	/* Chain for buf IO for disk drives with checksumming (PM disabled) */
2265 	SD_CHAIN_BUFIO,			/* Index: 16 */
2266 	SD_CHAIN_BUFIO,			/* Index: 17 */
2267 	SD_CHAIN_BUFIO,			/* Index: 18 */
2268 
2269 	/* Chain for USCSI commands (non-checksum targets) */
2270 	SD_CHAIN_USCSI,			/* Index: 19 */
2271 	SD_CHAIN_USCSI,			/* Index: 20 */
2272 
2273 	/* Chain for USCSI commands (checksum targets) */
2274 	SD_CHAIN_USCSI,			/* Index: 21 */
2275 	SD_CHAIN_USCSI,			/* Index: 22 */
2276 	SD_CHAIN_USCSI,			/* Index: 23 */
2277 
2278 	/* Chain for "direct" USCSI commands (all targets) */
2279 	SD_CHAIN_DIRECT,		/* Index: 24 */
2280 
2281 	/* Chain for "direct priority" USCSI commands (all targets) */
2282 	SD_CHAIN_DIRECT_PRIORITY,	/* Index: 25 */
2283 
2284 	/*
2285 	 * Chain for buf IO for large sector size disk drive targets
2286 	 * with checksumming (PM enabled)
2287 	 */
2288 	SD_CHAIN_BUFIO,			/* Index: 26 */
2289 	SD_CHAIN_BUFIO,			/* Index: 27 */
2290 	SD_CHAIN_BUFIO,			/* Index: 28 */
2291 	SD_CHAIN_BUFIO,			/* Index: 29 */
2292 	SD_CHAIN_BUFIO,			/* Index: 30 */
2293 
2294 	/*
2295 	 * Chain for buf IO for large sector size disk drive targets
2296 	 * with checksumming (PM disabled)
2297 	 */
2298 	SD_CHAIN_BUFIO,			/* Index: 31 */
2299 	SD_CHAIN_BUFIO,			/* Index: 32 */
2300 	SD_CHAIN_BUFIO,			/* Index: 33 */
2301 	SD_CHAIN_BUFIO,			/* Index: 34 */
2302 };
2303 
2304 
2305 /* Macro to return TRUE if the IO has come from the sd_buf_iostart() chain. */
2306 #define	SD_IS_BUFIO(xp)			\
2307 	(sd_chain_type_map[(xp)->xb_chain_iostart] == SD_CHAIN_BUFIO)
2308 
2309 /* Macro to return TRUE if the IO has come from the "direct priority" chain. */
2310 #define	SD_IS_DIRECT_PRIORITY(xp)	\
2311 	(sd_chain_type_map[(xp)->xb_chain_iostart] == SD_CHAIN_DIRECT_PRIORITY)
2312 
2313 
2314 
2315 /*
2316  * Struct, array, and macros to map a specific chain to the appropriate
2317  * layering indexes in the sd_iostart_chain[] and sd_iodone_chain[] arrays.
2318  *
2319  * The sd_chain_index_map[] array is used at attach time to set the various
2320  * un_xxx_chain type members of the sd_lun softstate to the specific layering
2321  * chain to be used with the instance. This allows different instances to use
2322  * different chain for buf IO, uscsi IO, etc.. Also, since the xb_chain_iostart
2323  * and xb_chain_iodone index values in the sd_xbuf are initialized to these
2324  * values at sd_xbuf init time, this allows (1) layering chains may be changed
2325  * dynamically & without the use of locking; and (2) a layer may update the
2326  * xb_chain_io[start|done] member in a given xbuf with its current index value,
2327  * to allow for deferred processing of an IO within the same chain from a
2328  * different execution context.
2329  */
2330 
2331 struct sd_chain_index {
2332 	int	sci_iostart_index;
2333 	int	sci_iodone_index;
2334 };
2335 
2336 static struct sd_chain_index	sd_chain_index_map[] = {
2337 	{ SD_CHAIN_DISK_IOSTART,		SD_CHAIN_DISK_IODONE },
2338 	{ SD_CHAIN_DISK_IOSTART_NO_PM,		SD_CHAIN_DISK_IODONE_NO_PM },
2339 	{ SD_CHAIN_RMMEDIA_IOSTART,		SD_CHAIN_RMMEDIA_IODONE },
2340 	{ SD_CHAIN_RMMEDIA_IOSTART_NO_PM,	SD_CHAIN_RMMEDIA_IODONE_NO_PM },
2341 	{ SD_CHAIN_CHKSUM_IOSTART,		SD_CHAIN_CHKSUM_IODONE },
2342 	{ SD_CHAIN_CHKSUM_IOSTART_NO_PM,	SD_CHAIN_CHKSUM_IODONE_NO_PM },
2343 	{ SD_CHAIN_USCSI_CMD_IOSTART,		SD_CHAIN_USCSI_CMD_IODONE },
2344 	{ SD_CHAIN_USCSI_CHKSUM_IOSTART,	SD_CHAIN_USCSI_CHKSUM_IODONE },
2345 	{ SD_CHAIN_DIRECT_CMD_IOSTART,		SD_CHAIN_DIRECT_CMD_IODONE },
2346 	{ SD_CHAIN_PRIORITY_CMD_IOSTART,	SD_CHAIN_PRIORITY_CMD_IODONE },
2347 	{ SD_CHAIN_MSS_CHKSUM_IOSTART,		SD_CHAIN_MSS_CHKSUM_IODONE },
2348 	{ SD_CHAIN_MSS_CHKSUM_IOSTART_NO_PM, SD_CHAIN_MSS_CHKSUM_IODONE_NO_PM },
2349 
2350 };
2351 
2352 
2353 /*
2354  * The following are indexes into the sd_chain_index_map[] array.
2355  */
2356 
2357 /* un->un_buf_chain_type must be set to one of these */
2358 #define	SD_CHAIN_INFO_DISK		0
2359 #define	SD_CHAIN_INFO_DISK_NO_PM	1
2360 #define	SD_CHAIN_INFO_RMMEDIA		2
2361 #define	SD_CHAIN_INFO_MSS_DISK		2
2362 #define	SD_CHAIN_INFO_RMMEDIA_NO_PM	3
2363 #define	SD_CHAIN_INFO_MSS_DSK_NO_PM	3
2364 #define	SD_CHAIN_INFO_CHKSUM		4
2365 #define	SD_CHAIN_INFO_CHKSUM_NO_PM	5
2366 #define	SD_CHAIN_INFO_MSS_DISK_CHKSUM	10
2367 #define	SD_CHAIN_INFO_MSS_DISK_CHKSUM_NO_PM	11
2368 
2369 /* un->un_uscsi_chain_type must be set to one of these */
2370 #define	SD_CHAIN_INFO_USCSI_CMD		6
2371 /* USCSI with PM disabled is the same as DIRECT */
2372 #define	SD_CHAIN_INFO_USCSI_CMD_NO_PM	8
2373 #define	SD_CHAIN_INFO_USCSI_CHKSUM	7
2374 
2375 /* un->un_direct_chain_type must be set to one of these */
2376 #define	SD_CHAIN_INFO_DIRECT_CMD	8
2377 
2378 /* un->un_priority_chain_type must be set to one of these */
2379 #define	SD_CHAIN_INFO_PRIORITY_CMD	9
2380 
2381 /* size for devid inquiries */
2382 #define	MAX_INQUIRY_SIZE		0xF0
2383 
2384 /*
2385  * Macros used by functions to pass a given buf(9S) struct along to the
2386  * next function in the layering chain for further processing.
2387  *
2388  * In the following macros, passing more than three arguments to the called
2389  * routines causes the optimizer for the SPARC compiler to stop doing tail
2390  * call elimination which results in significant performance degradation.
2391  */
2392 #define	SD_BEGIN_IOSTART(index, un, bp)	\
2393 	((*(sd_iostart_chain[index]))(index, un, bp))
2394 
2395 #define	SD_BEGIN_IODONE(index, un, bp)	\
2396 	((*(sd_iodone_chain[index]))(index, un, bp))
2397 
2398 #define	SD_NEXT_IOSTART(index, un, bp)				\
2399 	((*(sd_iostart_chain[(index) + 1]))((index) + 1, un, bp))
2400 
2401 #define	SD_NEXT_IODONE(index, un, bp)				\
2402 	((*(sd_iodone_chain[(index) - 1]))((index) - 1, un, bp))
2403 
2404 /*
2405  *    Function: _init
2406  *
2407  * Description: This is the driver _init(9E) entry point.
2408  *
2409  * Return Code: Returns the value from mod_install(9F) or
2410  *		ddi_soft_state_init(9F) as appropriate.
2411  *
2412  *     Context: Called when driver module loaded.
2413  */
2414 
2415 int
2416 _init(void)
2417 {
2418 	int	err;
2419 
2420 	/* establish driver name from module name */
2421 	sd_label = (char *)mod_modname(&modlinkage);
2422 
2423 #ifndef XPV_HVM_DRIVER
2424 	err = ddi_soft_state_init(&sd_state, sizeof (struct sd_lun),
2425 	    SD_MAXUNIT);
2426 	if (err != 0) {
2427 		return (err);
2428 	}
2429 
2430 #else /* XPV_HVM_DRIVER */
2431 	/* Remove the leading "hvm_" from the module name */
2432 	ASSERT(strncmp(sd_label, "hvm_", strlen("hvm_")) == 0);
2433 	sd_label += strlen("hvm_");
2434 
2435 #endif /* XPV_HVM_DRIVER */
2436 
2437 	mutex_init(&sd_detach_mutex, NULL, MUTEX_DRIVER, NULL);
2438 	mutex_init(&sd_log_mutex,    NULL, MUTEX_DRIVER, NULL);
2439 	mutex_init(&sd_label_mutex,  NULL, MUTEX_DRIVER, NULL);
2440 
2441 	mutex_init(&sd_tr.srq_resv_reclaim_mutex, NULL, MUTEX_DRIVER, NULL);
2442 	cv_init(&sd_tr.srq_resv_reclaim_cv, NULL, CV_DRIVER, NULL);
2443 	cv_init(&sd_tr.srq_inprocess_cv, NULL, CV_DRIVER, NULL);
2444 
2445 	/*
2446 	 * it's ok to init here even for fibre device
2447 	 */
2448 	sd_scsi_probe_cache_init();
2449 
2450 	sd_scsi_target_lun_init();
2451 
2452 	/*
2453 	 * Creating taskq before mod_install ensures that all callers (threads)
2454 	 * that enter the module after a successful mod_install encounter
2455 	 * a valid taskq.
2456 	 */
2457 	sd_taskq_create();
2458 
2459 	err = mod_install(&modlinkage);
2460 	if (err != 0) {
2461 		/* delete taskq if install fails */
2462 		sd_taskq_delete();
2463 
2464 		mutex_destroy(&sd_detach_mutex);
2465 		mutex_destroy(&sd_log_mutex);
2466 		mutex_destroy(&sd_label_mutex);
2467 
2468 		mutex_destroy(&sd_tr.srq_resv_reclaim_mutex);
2469 		cv_destroy(&sd_tr.srq_resv_reclaim_cv);
2470 		cv_destroy(&sd_tr.srq_inprocess_cv);
2471 
2472 		sd_scsi_probe_cache_fini();
2473 
2474 		sd_scsi_target_lun_fini();
2475 
2476 #ifndef XPV_HVM_DRIVER
2477 		ddi_soft_state_fini(&sd_state);
2478 #endif /* !XPV_HVM_DRIVER */
2479 		return (err);
2480 	}
2481 
2482 	return (err);
2483 }
2484 
2485 
2486 /*
2487  *    Function: _fini
2488  *
2489  * Description: This is the driver _fini(9E) entry point.
2490  *
2491  * Return Code: Returns the value from mod_remove(9F)
2492  *
2493  *     Context: Called when driver module is unloaded.
2494  */
2495 
2496 int
2497 _fini(void)
2498 {
2499 	int err;
2500 
2501 	if ((err = mod_remove(&modlinkage)) != 0) {
2502 		return (err);
2503 	}
2504 
2505 	sd_taskq_delete();
2506 
2507 	mutex_destroy(&sd_detach_mutex);
2508 	mutex_destroy(&sd_log_mutex);
2509 	mutex_destroy(&sd_label_mutex);
2510 	mutex_destroy(&sd_tr.srq_resv_reclaim_mutex);
2511 
2512 	sd_scsi_probe_cache_fini();
2513 
2514 	sd_scsi_target_lun_fini();
2515 
2516 	cv_destroy(&sd_tr.srq_resv_reclaim_cv);
2517 	cv_destroy(&sd_tr.srq_inprocess_cv);
2518 
2519 #ifndef XPV_HVM_DRIVER
2520 	ddi_soft_state_fini(&sd_state);
2521 #endif /* !XPV_HVM_DRIVER */
2522 
2523 	return (err);
2524 }
2525 
2526 
2527 /*
2528  *    Function: _info
2529  *
2530  * Description: This is the driver _info(9E) entry point.
2531  *
2532  *   Arguments: modinfop - pointer to the driver modinfo structure
2533  *
2534  * Return Code: Returns the value from mod_info(9F).
2535  *
2536  *     Context: Kernel thread context
2537  */
2538 
2539 int
2540 _info(struct modinfo *modinfop)
2541 {
2542 	return (mod_info(&modlinkage, modinfop));
2543 }
2544 
2545 
2546 /*
2547  * The following routines implement the driver message logging facility.
2548  * They provide component- and level- based debug output filtering.
2549  * Output may also be restricted to messages for a single instance by
2550  * specifying a soft state pointer in sd_debug_un. If sd_debug_un is set
2551  * to NULL, then messages for all instances are printed.
2552  *
2553  * These routines have been cloned from each other due to the language
2554  * constraints of macros and variable argument list processing.
2555  */
2556 
2557 
2558 /*
2559  *    Function: sd_log_err
2560  *
2561  * Description: This routine is called by the SD_ERROR macro for debug
2562  *		logging of error conditions.
2563  *
2564  *   Arguments: comp - driver component being logged
2565  *		dev  - pointer to driver info structure
2566  *		fmt  - error string and format to be logged
2567  */
2568 
2569 static void
2570 sd_log_err(uint_t comp, struct sd_lun *un, const char *fmt, ...)
2571 {
2572 	va_list		ap;
2573 	dev_info_t	*dev;
2574 
2575 	ASSERT(un != NULL);
2576 	dev = SD_DEVINFO(un);
2577 	ASSERT(dev != NULL);
2578 
2579 	/*
2580 	 * Filter messages based on the global component and level masks.
2581 	 * Also print if un matches the value of sd_debug_un, or if
2582 	 * sd_debug_un is set to NULL.
2583 	 */
2584 	if ((sd_component_mask & comp) && (sd_level_mask & SD_LOGMASK_ERROR) &&
2585 	    ((sd_debug_un == NULL) || (sd_debug_un == un))) {
2586 		mutex_enter(&sd_log_mutex);
2587 		va_start(ap, fmt);
2588 		(void) vsprintf(sd_log_buf, fmt, ap);
2589 		va_end(ap);
2590 		scsi_log(dev, sd_label, CE_CONT, "%s", sd_log_buf);
2591 		mutex_exit(&sd_log_mutex);
2592 	}
2593 #ifdef SD_FAULT_INJECTION
2594 	_NOTE(DATA_READABLE_WITHOUT_LOCK(sd_lun::sd_injection_mask));
2595 	if (un->sd_injection_mask & comp) {
2596 		mutex_enter(&sd_log_mutex);
2597 		va_start(ap, fmt);
2598 		(void) vsprintf(sd_log_buf, fmt, ap);
2599 		va_end(ap);
2600 		sd_injection_log(sd_log_buf, un);
2601 		mutex_exit(&sd_log_mutex);
2602 	}
2603 #endif
2604 }
2605 
2606 
2607 /*
2608  *    Function: sd_log_info
2609  *
2610  * Description: This routine is called by the SD_INFO macro for debug
2611  *		logging of general purpose informational conditions.
2612  *
2613  *   Arguments: comp - driver component being logged
2614  *		dev  - pointer to driver info structure
2615  *		fmt  - info string and format to be logged
2616  */
2617 
2618 static void
2619 sd_log_info(uint_t component, struct sd_lun *un, const char *fmt, ...)
2620 {
2621 	va_list		ap;
2622 	dev_info_t	*dev;
2623 
2624 	ASSERT(un != NULL);
2625 	dev = SD_DEVINFO(un);
2626 	ASSERT(dev != NULL);
2627 
2628 	/*
2629 	 * Filter messages based on the global component and level masks.
2630 	 * Also print if un matches the value of sd_debug_un, or if
2631 	 * sd_debug_un is set to NULL.
2632 	 */
2633 	if ((sd_component_mask & component) &&
2634 	    (sd_level_mask & SD_LOGMASK_INFO) &&
2635 	    ((sd_debug_un == NULL) || (sd_debug_un == un))) {
2636 		mutex_enter(&sd_log_mutex);
2637 		va_start(ap, fmt);
2638 		(void) vsprintf(sd_log_buf, fmt, ap);
2639 		va_end(ap);
2640 		scsi_log(dev, sd_label, CE_CONT, "%s", sd_log_buf);
2641 		mutex_exit(&sd_log_mutex);
2642 	}
2643 #ifdef SD_FAULT_INJECTION
2644 	_NOTE(DATA_READABLE_WITHOUT_LOCK(sd_lun::sd_injection_mask));
2645 	if (un->sd_injection_mask & component) {
2646 		mutex_enter(&sd_log_mutex);
2647 		va_start(ap, fmt);
2648 		(void) vsprintf(sd_log_buf, fmt, ap);
2649 		va_end(ap);
2650 		sd_injection_log(sd_log_buf, un);
2651 		mutex_exit(&sd_log_mutex);
2652 	}
2653 #endif
2654 }
2655 
2656 
2657 /*
2658  *    Function: sd_log_trace
2659  *
2660  * Description: This routine is called by the SD_TRACE macro for debug
2661  *		logging of trace conditions (i.e. function entry/exit).
2662  *
2663  *   Arguments: comp - driver component being logged
2664  *		dev  - pointer to driver info structure
2665  *		fmt  - trace string and format to be logged
2666  */
2667 
2668 static void
2669 sd_log_trace(uint_t component, struct sd_lun *un, const char *fmt, ...)
2670 {
2671 	va_list		ap;
2672 	dev_info_t	*dev;
2673 
2674 	ASSERT(un != NULL);
2675 	dev = SD_DEVINFO(un);
2676 	ASSERT(dev != NULL);
2677 
2678 	/*
2679 	 * Filter messages based on the global component and level masks.
2680 	 * Also print if un matches the value of sd_debug_un, or if
2681 	 * sd_debug_un is set to NULL.
2682 	 */
2683 	if ((sd_component_mask & component) &&
2684 	    (sd_level_mask & SD_LOGMASK_TRACE) &&
2685 	    ((sd_debug_un == NULL) || (sd_debug_un == un))) {
2686 		mutex_enter(&sd_log_mutex);
2687 		va_start(ap, fmt);
2688 		(void) vsprintf(sd_log_buf, fmt, ap);
2689 		va_end(ap);
2690 		scsi_log(dev, sd_label, CE_CONT, "%s", sd_log_buf);
2691 		mutex_exit(&sd_log_mutex);
2692 	}
2693 #ifdef SD_FAULT_INJECTION
2694 	_NOTE(DATA_READABLE_WITHOUT_LOCK(sd_lun::sd_injection_mask));
2695 	if (un->sd_injection_mask & component) {
2696 		mutex_enter(&sd_log_mutex);
2697 		va_start(ap, fmt);
2698 		(void) vsprintf(sd_log_buf, fmt, ap);
2699 		va_end(ap);
2700 		sd_injection_log(sd_log_buf, un);
2701 		mutex_exit(&sd_log_mutex);
2702 	}
2703 #endif
2704 }
2705 
2706 
2707 /*
2708  *    Function: sdprobe
2709  *
2710  * Description: This is the driver probe(9e) entry point function.
2711  *
2712  *   Arguments: devi - opaque device info handle
2713  *
2714  * Return Code: DDI_PROBE_SUCCESS: If the probe was successful.
2715  *              DDI_PROBE_FAILURE: If the probe failed.
2716  *              DDI_PROBE_PARTIAL: If the instance is not present now,
2717  *				   but may be present in the future.
2718  */
2719 
2720 static int
2721 sdprobe(dev_info_t *devi)
2722 {
2723 	struct scsi_device	*devp;
2724 	int			rval;
2725 #ifndef XPV_HVM_DRIVER
2726 	int			instance = ddi_get_instance(devi);
2727 #endif /* !XPV_HVM_DRIVER */
2728 
2729 	/*
2730 	 * if it wasn't for pln, sdprobe could actually be nulldev
2731 	 * in the "__fibre" case.
2732 	 */
2733 	if (ddi_dev_is_sid(devi) == DDI_SUCCESS) {
2734 		return (DDI_PROBE_DONTCARE);
2735 	}
2736 
2737 	devp = ddi_get_driver_private(devi);
2738 
2739 	if (devp == NULL) {
2740 		/* Ooops... nexus driver is mis-configured... */
2741 		return (DDI_PROBE_FAILURE);
2742 	}
2743 
2744 #ifndef XPV_HVM_DRIVER
2745 	if (ddi_get_soft_state(sd_state, instance) != NULL) {
2746 		return (DDI_PROBE_PARTIAL);
2747 	}
2748 #endif /* !XPV_HVM_DRIVER */
2749 
2750 	/*
2751 	 * Call the SCSA utility probe routine to see if we actually
2752 	 * have a target at this SCSI nexus.
2753 	 */
2754 	switch (sd_scsi_probe_with_cache(devp, NULL_FUNC)) {
2755 	case SCSIPROBE_EXISTS:
2756 		switch (devp->sd_inq->inq_dtype) {
2757 		case DTYPE_DIRECT:
2758 			rval = DDI_PROBE_SUCCESS;
2759 			break;
2760 		case DTYPE_RODIRECT:
2761 			/* CDs etc. Can be removable media */
2762 			rval = DDI_PROBE_SUCCESS;
2763 			break;
2764 		case DTYPE_OPTICAL:
2765 			/*
2766 			 * Rewritable optical driver HP115AA
2767 			 * Can also be removable media
2768 			 */
2769 
2770 			/*
2771 			 * Do not attempt to bind to  DTYPE_OPTICAL if
2772 			 * pre solaris 9 sparc sd behavior is required
2773 			 *
2774 			 * If first time through and sd_dtype_optical_bind
2775 			 * has not been set in /etc/system check properties
2776 			 */
2777 
2778 			if (sd_dtype_optical_bind  < 0) {
2779 				sd_dtype_optical_bind = ddi_prop_get_int
2780 				    (DDI_DEV_T_ANY, devi, 0,
2781 				    "optical-device-bind", 1);
2782 			}
2783 
2784 			if (sd_dtype_optical_bind == 0) {
2785 				rval = DDI_PROBE_FAILURE;
2786 			} else {
2787 				rval = DDI_PROBE_SUCCESS;
2788 			}
2789 			break;
2790 
2791 		case DTYPE_NOTPRESENT:
2792 		default:
2793 			rval = DDI_PROBE_FAILURE;
2794 			break;
2795 		}
2796 		break;
2797 	default:
2798 		rval = DDI_PROBE_PARTIAL;
2799 		break;
2800 	}
2801 
2802 	/*
2803 	 * This routine checks for resource allocation prior to freeing,
2804 	 * so it will take care of the "smart probing" case where a
2805 	 * scsi_probe() may or may not have been issued and will *not*
2806 	 * free previously-freed resources.
2807 	 */
2808 	scsi_unprobe(devp);
2809 	return (rval);
2810 }
2811 
2812 
2813 /*
2814  *    Function: sdinfo
2815  *
2816  * Description: This is the driver getinfo(9e) entry point function.
2817  * 		Given the device number, return the devinfo pointer from
2818  *		the scsi_device structure or the instance number
2819  *		associated with the dev_t.
2820  *
2821  *   Arguments: dip     - pointer to device info structure
2822  *		infocmd - command argument (DDI_INFO_DEVT2DEVINFO,
2823  *			  DDI_INFO_DEVT2INSTANCE)
2824  *		arg     - driver dev_t
2825  *		resultp - user buffer for request response
2826  *
2827  * Return Code: DDI_SUCCESS
2828  *              DDI_FAILURE
2829  */
2830 /* ARGSUSED */
2831 static int
2832 sdinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
2833 {
2834 	struct sd_lun	*un;
2835 	dev_t		dev;
2836 	int		instance;
2837 	int		error;
2838 
2839 	switch (infocmd) {
2840 	case DDI_INFO_DEVT2DEVINFO:
2841 		dev = (dev_t)arg;
2842 		instance = SDUNIT(dev);
2843 		if ((un = ddi_get_soft_state(sd_state, instance)) == NULL) {
2844 			return (DDI_FAILURE);
2845 		}
2846 		*result = (void *) SD_DEVINFO(un);
2847 		error = DDI_SUCCESS;
2848 		break;
2849 	case DDI_INFO_DEVT2INSTANCE:
2850 		dev = (dev_t)arg;
2851 		instance = SDUNIT(dev);
2852 		*result = (void *)(uintptr_t)instance;
2853 		error = DDI_SUCCESS;
2854 		break;
2855 	default:
2856 		error = DDI_FAILURE;
2857 	}
2858 	return (error);
2859 }
2860 
2861 /*
2862  *    Function: sd_prop_op
2863  *
2864  * Description: This is the driver prop_op(9e) entry point function.
2865  *		Return the number of blocks for the partition in question
2866  *		or forward the request to the property facilities.
2867  *
2868  *   Arguments: dev       - device number
2869  *		dip       - pointer to device info structure
2870  *		prop_op   - property operator
2871  *		mod_flags - DDI_PROP_DONTPASS, don't pass to parent
2872  *		name      - pointer to property name
2873  *		valuep    - pointer or address of the user buffer
2874  *		lengthp   - property length
2875  *
2876  * Return Code: DDI_PROP_SUCCESS
2877  *              DDI_PROP_NOT_FOUND
2878  *              DDI_PROP_UNDEFINED
2879  *              DDI_PROP_NO_MEMORY
2880  *              DDI_PROP_BUF_TOO_SMALL
2881  */
2882 
2883 static int
2884 sd_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, int mod_flags,
2885 	char *name, caddr_t valuep, int *lengthp)
2886 {
2887 	struct sd_lun	*un;
2888 
2889 	if ((un = ddi_get_soft_state(sd_state, ddi_get_instance(dip))) == NULL)
2890 		return (ddi_prop_op(dev, dip, prop_op, mod_flags,
2891 		    name, valuep, lengthp));
2892 
2893 	return (cmlb_prop_op(un->un_cmlbhandle,
2894 	    dev, dip, prop_op, mod_flags, name, valuep, lengthp,
2895 	    SDPART(dev), (void *)SD_PATH_DIRECT));
2896 }
2897 
2898 /*
2899  * The following functions are for smart probing:
2900  * sd_scsi_probe_cache_init()
2901  * sd_scsi_probe_cache_fini()
2902  * sd_scsi_clear_probe_cache()
2903  * sd_scsi_probe_with_cache()
2904  */
2905 
2906 /*
2907  *    Function: sd_scsi_probe_cache_init
2908  *
2909  * Description: Initializes the probe response cache mutex and head pointer.
2910  *
2911  *     Context: Kernel thread context
2912  */
2913 
2914 static void
2915 sd_scsi_probe_cache_init(void)
2916 {
2917 	mutex_init(&sd_scsi_probe_cache_mutex, NULL, MUTEX_DRIVER, NULL);
2918 	sd_scsi_probe_cache_head = NULL;
2919 }
2920 
2921 
2922 /*
2923  *    Function: sd_scsi_probe_cache_fini
2924  *
2925  * Description: Frees all resources associated with the probe response cache.
2926  *
2927  *     Context: Kernel thread context
2928  */
2929 
2930 static void
2931 sd_scsi_probe_cache_fini(void)
2932 {
2933 	struct sd_scsi_probe_cache *cp;
2934 	struct sd_scsi_probe_cache *ncp;
2935 
2936 	/* Clean up our smart probing linked list */
2937 	for (cp = sd_scsi_probe_cache_head; cp != NULL; cp = ncp) {
2938 		ncp = cp->next;
2939 		kmem_free(cp, sizeof (struct sd_scsi_probe_cache));
2940 	}
2941 	sd_scsi_probe_cache_head = NULL;
2942 	mutex_destroy(&sd_scsi_probe_cache_mutex);
2943 }
2944 
2945 
2946 /*
2947  *    Function: sd_scsi_clear_probe_cache
2948  *
2949  * Description: This routine clears the probe response cache. This is
2950  *		done when open() returns ENXIO so that when deferred
2951  *		attach is attempted (possibly after a device has been
2952  *		turned on) we will retry the probe. Since we don't know
2953  *		which target we failed to open, we just clear the
2954  *		entire cache.
2955  *
2956  *     Context: Kernel thread context
2957  */
2958 
2959 static void
2960 sd_scsi_clear_probe_cache(void)
2961 {
2962 	struct sd_scsi_probe_cache	*cp;
2963 	int				i;
2964 
2965 	mutex_enter(&sd_scsi_probe_cache_mutex);
2966 	for (cp = sd_scsi_probe_cache_head; cp != NULL; cp = cp->next) {
2967 		/*
2968 		 * Reset all entries to SCSIPROBE_EXISTS.  This will
2969 		 * force probing to be performed the next time
2970 		 * sd_scsi_probe_with_cache is called.
2971 		 */
2972 		for (i = 0; i < NTARGETS_WIDE; i++) {
2973 			cp->cache[i] = SCSIPROBE_EXISTS;
2974 		}
2975 	}
2976 	mutex_exit(&sd_scsi_probe_cache_mutex);
2977 }
2978 
2979 
2980 /*
2981  *    Function: sd_scsi_probe_with_cache
2982  *
2983  * Description: This routine implements support for a scsi device probe
2984  *		with cache. The driver maintains a cache of the target
2985  *		responses to scsi probes. If we get no response from a
2986  *		target during a probe inquiry, we remember that, and we
2987  *		avoid additional calls to scsi_probe on non-zero LUNs
2988  *		on the same target until the cache is cleared. By doing
2989  *		so we avoid the 1/4 sec selection timeout for nonzero
2990  *		LUNs. lun0 of a target is always probed.
2991  *
2992  *   Arguments: devp     - Pointer to a scsi_device(9S) structure
2993  *              waitfunc - indicates what the allocator routines should
2994  *			   do when resources are not available. This value
2995  *			   is passed on to scsi_probe() when that routine
2996  *			   is called.
2997  *
2998  * Return Code: SCSIPROBE_NORESP if a NORESP in probe response cache;
2999  *		otherwise the value returned by scsi_probe(9F).
3000  *
3001  *     Context: Kernel thread context
3002  */
3003 
3004 static int
3005 sd_scsi_probe_with_cache(struct scsi_device *devp, int (*waitfn)())
3006 {
3007 	struct sd_scsi_probe_cache	*cp;
3008 	dev_info_t	*pdip = ddi_get_parent(devp->sd_dev);
3009 	int		lun, tgt;
3010 
3011 	lun = ddi_prop_get_int(DDI_DEV_T_ANY, devp->sd_dev, DDI_PROP_DONTPASS,
3012 	    SCSI_ADDR_PROP_LUN, 0);
3013 	tgt = ddi_prop_get_int(DDI_DEV_T_ANY, devp->sd_dev, DDI_PROP_DONTPASS,
3014 	    SCSI_ADDR_PROP_TARGET, -1);
3015 
3016 	/* Make sure caching enabled and target in range */
3017 	if ((tgt < 0) || (tgt >= NTARGETS_WIDE)) {
3018 		/* do it the old way (no cache) */
3019 		return (scsi_probe(devp, waitfn));
3020 	}
3021 
3022 	mutex_enter(&sd_scsi_probe_cache_mutex);
3023 
3024 	/* Find the cache for this scsi bus instance */
3025 	for (cp = sd_scsi_probe_cache_head; cp != NULL; cp = cp->next) {
3026 		if (cp->pdip == pdip) {
3027 			break;
3028 		}
3029 	}
3030 
3031 	/* If we can't find a cache for this pdip, create one */
3032 	if (cp == NULL) {
3033 		int i;
3034 
3035 		cp = kmem_zalloc(sizeof (struct sd_scsi_probe_cache),
3036 		    KM_SLEEP);
3037 		cp->pdip = pdip;
3038 		cp->next = sd_scsi_probe_cache_head;
3039 		sd_scsi_probe_cache_head = cp;
3040 		for (i = 0; i < NTARGETS_WIDE; i++) {
3041 			cp->cache[i] = SCSIPROBE_EXISTS;
3042 		}
3043 	}
3044 
3045 	mutex_exit(&sd_scsi_probe_cache_mutex);
3046 
3047 	/* Recompute the cache for this target if LUN zero */
3048 	if (lun == 0) {
3049 		cp->cache[tgt] = SCSIPROBE_EXISTS;
3050 	}
3051 
3052 	/* Don't probe if cache remembers a NORESP from a previous LUN. */
3053 	if (cp->cache[tgt] != SCSIPROBE_EXISTS) {
3054 		return (SCSIPROBE_NORESP);
3055 	}
3056 
3057 	/* Do the actual probe; save & return the result */
3058 	return (cp->cache[tgt] = scsi_probe(devp, waitfn));
3059 }
3060 
3061 
3062 /*
3063  *    Function: sd_scsi_target_lun_init
3064  *
3065  * Description: Initializes the attached lun chain mutex and head pointer.
3066  *
3067  *     Context: Kernel thread context
3068  */
3069 
3070 static void
3071 sd_scsi_target_lun_init(void)
3072 {
3073 	mutex_init(&sd_scsi_target_lun_mutex, NULL, MUTEX_DRIVER, NULL);
3074 	sd_scsi_target_lun_head = NULL;
3075 }
3076 
3077 
3078 /*
3079  *    Function: sd_scsi_target_lun_fini
3080  *
3081  * Description: Frees all resources associated with the attached lun
3082  *              chain
3083  *
3084  *     Context: Kernel thread context
3085  */
3086 
3087 static void
3088 sd_scsi_target_lun_fini(void)
3089 {
3090 	struct sd_scsi_hba_tgt_lun	*cp;
3091 	struct sd_scsi_hba_tgt_lun	*ncp;
3092 
3093 	for (cp = sd_scsi_target_lun_head; cp != NULL; cp = ncp) {
3094 		ncp = cp->next;
3095 		kmem_free(cp, sizeof (struct sd_scsi_hba_tgt_lun));
3096 	}
3097 	sd_scsi_target_lun_head = NULL;
3098 	mutex_destroy(&sd_scsi_target_lun_mutex);
3099 }
3100 
3101 
3102 /*
3103  *    Function: sd_scsi_get_target_lun_count
3104  *
3105  * Description: This routine will check in the attached lun chain to see
3106  * 		how many luns are attached on the required SCSI controller
3107  * 		and target. Currently, some capabilities like tagged queue
3108  *		are supported per target based by HBA. So all luns in a
3109  *		target have the same capabilities. Based on this assumption,
3110  * 		sd should only set these capabilities once per target. This
3111  *		function is called when sd needs to decide how many luns
3112  *		already attached on a target.
3113  *
3114  *   Arguments: dip	- Pointer to the system's dev_info_t for the SCSI
3115  *			  controller device.
3116  *              target	- The target ID on the controller's SCSI bus.
3117  *
3118  * Return Code: The number of luns attached on the required target and
3119  *		controller.
3120  *		-1 if target ID is not in parallel SCSI scope or the given
3121  * 		dip is not in the chain.
3122  *
3123  *     Context: Kernel thread context
3124  */
3125 
3126 static int
3127 sd_scsi_get_target_lun_count(dev_info_t *dip, int target)
3128 {
3129 	struct sd_scsi_hba_tgt_lun	*cp;
3130 
3131 	if ((target < 0) || (target >= NTARGETS_WIDE)) {
3132 		return (-1);
3133 	}
3134 
3135 	mutex_enter(&sd_scsi_target_lun_mutex);
3136 
3137 	for (cp = sd_scsi_target_lun_head; cp != NULL; cp = cp->next) {
3138 		if (cp->pdip == dip) {
3139 			break;
3140 		}
3141 	}
3142 
3143 	mutex_exit(&sd_scsi_target_lun_mutex);
3144 
3145 	if (cp == NULL) {
3146 		return (-1);
3147 	}
3148 
3149 	return (cp->nlun[target]);
3150 }
3151 
3152 
3153 /*
3154  *    Function: sd_scsi_update_lun_on_target
3155  *
3156  * Description: This routine is used to update the attached lun chain when a
3157  *		lun is attached or detached on a target.
3158  *
3159  *   Arguments: dip     - Pointer to the system's dev_info_t for the SCSI
3160  *                        controller device.
3161  *              target  - The target ID on the controller's SCSI bus.
3162  *		flag	- Indicate the lun is attached or detached.
3163  *
3164  *     Context: Kernel thread context
3165  */
3166 
3167 static void
3168 sd_scsi_update_lun_on_target(dev_info_t *dip, int target, int flag)
3169 {
3170 	struct sd_scsi_hba_tgt_lun	*cp;
3171 
3172 	mutex_enter(&sd_scsi_target_lun_mutex);
3173 
3174 	for (cp = sd_scsi_target_lun_head; cp != NULL; cp = cp->next) {
3175 		if (cp->pdip == dip) {
3176 			break;
3177 		}
3178 	}
3179 
3180 	if ((cp == NULL) && (flag == SD_SCSI_LUN_ATTACH)) {
3181 		cp = kmem_zalloc(sizeof (struct sd_scsi_hba_tgt_lun),
3182 		    KM_SLEEP);
3183 		cp->pdip = dip;
3184 		cp->next = sd_scsi_target_lun_head;
3185 		sd_scsi_target_lun_head = cp;
3186 	}
3187 
3188 	mutex_exit(&sd_scsi_target_lun_mutex);
3189 
3190 	if (cp != NULL) {
3191 		if (flag == SD_SCSI_LUN_ATTACH) {
3192 			cp->nlun[target] ++;
3193 		} else {
3194 			cp->nlun[target] --;
3195 		}
3196 	}
3197 }
3198 
3199 
3200 /*
3201  *    Function: sd_spin_up_unit
3202  *
3203  * Description: Issues the following commands to spin-up the device:
3204  *		START STOP UNIT, and INQUIRY.
3205  *
3206  *   Arguments: ssc   - ssc contains pointer to driver soft state (unit)
3207  *                      structure for this target.
3208  *
3209  * Return Code: 0 - success
3210  *		EIO - failure
3211  *		EACCES - reservation conflict
3212  *
3213  *     Context: Kernel thread context
3214  */
3215 
3216 static int
3217 sd_spin_up_unit(sd_ssc_t *ssc)
3218 {
3219 	size_t	resid		= 0;
3220 	int	has_conflict	= FALSE;
3221 	uchar_t *bufaddr;
3222 	int 	status;
3223 	struct sd_lun	*un;
3224 
3225 	ASSERT(ssc != NULL);
3226 	un = ssc->ssc_un;
3227 	ASSERT(un != NULL);
3228 
3229 	/*
3230 	 * Send a throwaway START UNIT command.
3231 	 *
3232 	 * If we fail on this, we don't care presently what precisely
3233 	 * is wrong.  EMC's arrays will also fail this with a check
3234 	 * condition (0x2/0x4/0x3) if the device is "inactive," but
3235 	 * we don't want to fail the attach because it may become
3236 	 * "active" later.
3237 	 * We don't know if power condition is supported or not at
3238 	 * this stage, use START STOP bit.
3239 	 */
3240 	status = sd_send_scsi_START_STOP_UNIT(ssc, SD_START_STOP,
3241 	    SD_TARGET_START, SD_PATH_DIRECT);
3242 
3243 	if (status != 0) {
3244 		if (status == EACCES)
3245 			has_conflict = TRUE;
3246 		sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3247 	}
3248 
3249 	/*
3250 	 * Send another INQUIRY command to the target. This is necessary for
3251 	 * non-removable media direct access devices because their INQUIRY data
3252 	 * may not be fully qualified until they are spun up (perhaps via the
3253 	 * START command above).  Note: This seems to be needed for some
3254 	 * legacy devices only.) The INQUIRY command should succeed even if a
3255 	 * Reservation Conflict is present.
3256 	 */
3257 	bufaddr = kmem_zalloc(SUN_INQSIZE, KM_SLEEP);
3258 
3259 	if (sd_send_scsi_INQUIRY(ssc, bufaddr, SUN_INQSIZE, 0, 0, &resid)
3260 	    != 0) {
3261 		kmem_free(bufaddr, SUN_INQSIZE);
3262 		sd_ssc_assessment(ssc, SD_FMT_STATUS_CHECK);
3263 		return (EIO);
3264 	}
3265 
3266 	/*
3267 	 * If we got enough INQUIRY data, copy it over the old INQUIRY data.
3268 	 * Note that this routine does not return a failure here even if the
3269 	 * INQUIRY command did not return any data.  This is a legacy behavior.
3270 	 */
3271 	if ((SUN_INQSIZE - resid) >= SUN_MIN_INQLEN) {
3272 		bcopy(bufaddr, SD_INQUIRY(un), SUN_INQSIZE);
3273 	}
3274 
3275 	kmem_free(bufaddr, SUN_INQSIZE);
3276 
3277 	/* If we hit a reservation conflict above, tell the caller. */
3278 	if (has_conflict == TRUE) {
3279 		return (EACCES);
3280 	}
3281 
3282 	return (0);
3283 }
3284 
3285 #ifdef _LP64
3286 /*
3287  *    Function: sd_enable_descr_sense
3288  *
3289  * Description: This routine attempts to select descriptor sense format
3290  *		using the Control mode page.  Devices that support 64 bit
3291  *		LBAs (for >2TB luns) should also implement descriptor
3292  *		sense data so we will call this function whenever we see
3293  *		a lun larger than 2TB.  If for some reason the device
3294  *		supports 64 bit LBAs but doesn't support descriptor sense
3295  *		presumably the mode select will fail.  Everything will
3296  *		continue to work normally except that we will not get
3297  *		complete sense data for commands that fail with an LBA
3298  *		larger than 32 bits.
3299  *
3300  *   Arguments: ssc   - ssc contains pointer to driver soft state (unit)
3301  *                      structure for this target.
3302  *
3303  *     Context: Kernel thread context only
3304  */
3305 
3306 static void
3307 sd_enable_descr_sense(sd_ssc_t *ssc)
3308 {
3309 	uchar_t			*header;
3310 	struct mode_control_scsi3 *ctrl_bufp;
3311 	size_t			buflen;
3312 	size_t			bd_len;
3313 	int			status;
3314 	struct sd_lun		*un;
3315 
3316 	ASSERT(ssc != NULL);
3317 	un = ssc->ssc_un;
3318 	ASSERT(un != NULL);
3319 
3320 	/*
3321 	 * Read MODE SENSE page 0xA, Control Mode Page
3322 	 */
3323 	buflen = MODE_HEADER_LENGTH + MODE_BLK_DESC_LENGTH +
3324 	    sizeof (struct mode_control_scsi3);
3325 	header = kmem_zalloc(buflen, KM_SLEEP);
3326 
3327 	status = sd_send_scsi_MODE_SENSE(ssc, CDB_GROUP0, header, buflen,
3328 	    MODEPAGE_CTRL_MODE, SD_PATH_DIRECT);
3329 
3330 	if (status != 0) {
3331 		SD_ERROR(SD_LOG_COMMON, un,
3332 		    "sd_enable_descr_sense: mode sense ctrl page failed\n");
3333 		goto eds_exit;
3334 	}
3335 
3336 	/*
3337 	 * Determine size of Block Descriptors in order to locate
3338 	 * the mode page data. ATAPI devices return 0, SCSI devices
3339 	 * should return MODE_BLK_DESC_LENGTH.
3340 	 */
3341 	bd_len  = ((struct mode_header *)header)->bdesc_length;
3342 
3343 	/* Clear the mode data length field for MODE SELECT */
3344 	((struct mode_header *)header)->length = 0;
3345 
3346 	ctrl_bufp = (struct mode_control_scsi3 *)
3347 	    (header + MODE_HEADER_LENGTH + bd_len);
3348 
3349 	/*
3350 	 * If the page length is smaller than the expected value,
3351 	 * the target device doesn't support D_SENSE. Bail out here.
3352 	 */
3353 	if (ctrl_bufp->mode_page.length <
3354 	    sizeof (struct mode_control_scsi3) - 2) {
3355 		SD_ERROR(SD_LOG_COMMON, un,
3356 		    "sd_enable_descr_sense: enable D_SENSE failed\n");
3357 		goto eds_exit;
3358 	}
3359 
3360 	/*
3361 	 * Clear PS bit for MODE SELECT
3362 	 */
3363 	ctrl_bufp->mode_page.ps = 0;
3364 
3365 	/*
3366 	 * Set D_SENSE to enable descriptor sense format.
3367 	 */
3368 	ctrl_bufp->d_sense = 1;
3369 
3370 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3371 
3372 	/*
3373 	 * Use MODE SELECT to commit the change to the D_SENSE bit
3374 	 */
3375 	status = sd_send_scsi_MODE_SELECT(ssc, CDB_GROUP0, header,
3376 	    buflen, SD_DONTSAVE_PAGE, SD_PATH_DIRECT);
3377 
3378 	if (status != 0) {
3379 		SD_INFO(SD_LOG_COMMON, un,
3380 		    "sd_enable_descr_sense: mode select ctrl page failed\n");
3381 	} else {
3382 		kmem_free(header, buflen);
3383 		return;
3384 	}
3385 
3386 eds_exit:
3387 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3388 	kmem_free(header, buflen);
3389 }
3390 
3391 /*
3392  *    Function: sd_reenable_dsense_task
3393  *
3394  * Description: Re-enable descriptor sense after device or bus reset
3395  *
3396  *     Context: Executes in a taskq() thread context
3397  */
3398 static void
3399 sd_reenable_dsense_task(void *arg)
3400 {
3401 	struct	sd_lun	*un = arg;
3402 	sd_ssc_t	*ssc;
3403 
3404 	ASSERT(un != NULL);
3405 
3406 	ssc = sd_ssc_init(un);
3407 	sd_enable_descr_sense(ssc);
3408 	sd_ssc_fini(ssc);
3409 }
3410 #endif /* _LP64 */
3411 
3412 /*
3413  *    Function: sd_set_mmc_caps
3414  *
3415  * Description: This routine determines if the device is MMC compliant and if
3416  *		the device supports CDDA via a mode sense of the CDVD
3417  *		capabilities mode page. Also checks if the device is a
3418  *		dvdram writable device.
3419  *
3420  *   Arguments: ssc   - ssc contains pointer to driver soft state (unit)
3421  *                      structure for this target.
3422  *
3423  *     Context: Kernel thread context only
3424  */
3425 
3426 static void
3427 sd_set_mmc_caps(sd_ssc_t *ssc)
3428 {
3429 	struct mode_header_grp2		*sense_mhp;
3430 	uchar_t				*sense_page;
3431 	caddr_t				buf;
3432 	int				bd_len;
3433 	int				status;
3434 	struct uscsi_cmd		com;
3435 	int				rtn;
3436 	uchar_t				*out_data_rw, *out_data_hd;
3437 	uchar_t				*rqbuf_rw, *rqbuf_hd;
3438 	uchar_t				*out_data_gesn;
3439 	int				gesn_len;
3440 	struct sd_lun			*un;
3441 
3442 	ASSERT(ssc != NULL);
3443 	un = ssc->ssc_un;
3444 	ASSERT(un != NULL);
3445 
3446 	/*
3447 	 * The flags which will be set in this function are - mmc compliant,
3448 	 * dvdram writable device, cdda support. Initialize them to FALSE
3449 	 * and if a capability is detected - it will be set to TRUE.
3450 	 */
3451 	un->un_f_mmc_cap = FALSE;
3452 	un->un_f_dvdram_writable_device = FALSE;
3453 	un->un_f_cfg_cdda = FALSE;
3454 
3455 	buf = kmem_zalloc(BUFLEN_MODE_CDROM_CAP, KM_SLEEP);
3456 	status = sd_send_scsi_MODE_SENSE(ssc, CDB_GROUP1, (uchar_t *)buf,
3457 	    BUFLEN_MODE_CDROM_CAP, MODEPAGE_CDROM_CAP, SD_PATH_DIRECT);
3458 
3459 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3460 
3461 	if (status != 0) {
3462 		/* command failed; just return */
3463 		kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3464 		return;
3465 	}
3466 	/*
3467 	 * If the mode sense request for the CDROM CAPABILITIES
3468 	 * page (0x2A) succeeds the device is assumed to be MMC.
3469 	 */
3470 	un->un_f_mmc_cap = TRUE;
3471 
3472 	/* See if GET STATUS EVENT NOTIFICATION is supported */
3473 	if (un->un_f_mmc_gesn_polling) {
3474 		gesn_len = SD_GESN_HEADER_LEN + SD_GESN_MEDIA_DATA_LEN;
3475 		out_data_gesn = kmem_zalloc(gesn_len, KM_SLEEP);
3476 
3477 		rtn = sd_send_scsi_GET_EVENT_STATUS_NOTIFICATION(ssc,
3478 		    out_data_gesn, gesn_len, 1 << SD_GESN_MEDIA_CLASS);
3479 
3480 		sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3481 
3482 		if ((rtn != 0) || !sd_gesn_media_data_valid(out_data_gesn)) {
3483 			un->un_f_mmc_gesn_polling = FALSE;
3484 			SD_INFO(SD_LOG_ATTACH_DETACH, un,
3485 			    "sd_set_mmc_caps: gesn not supported "
3486 			    "%d %x %x %x %x\n", rtn,
3487 			    out_data_gesn[0], out_data_gesn[1],
3488 			    out_data_gesn[2], out_data_gesn[3]);
3489 		}
3490 
3491 		kmem_free(out_data_gesn, gesn_len);
3492 	}
3493 
3494 	/* Get to the page data */
3495 	sense_mhp = (struct mode_header_grp2 *)buf;
3496 	bd_len = (sense_mhp->bdesc_length_hi << 8) |
3497 	    sense_mhp->bdesc_length_lo;
3498 	if (bd_len > MODE_BLK_DESC_LENGTH) {
3499 		/*
3500 		 * We did not get back the expected block descriptor
3501 		 * length so we cannot determine if the device supports
3502 		 * CDDA. However, we still indicate the device is MMC
3503 		 * according to the successful response to the page
3504 		 * 0x2A mode sense request.
3505 		 */
3506 		scsi_log(SD_DEVINFO(un), sd_label, CE_WARN,
3507 		    "sd_set_mmc_caps: Mode Sense returned "
3508 		    "invalid block descriptor length\n");
3509 		kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3510 		return;
3511 	}
3512 
3513 	/* See if read CDDA is supported */
3514 	sense_page = (uchar_t *)(buf + MODE_HEADER_LENGTH_GRP2 +
3515 	    bd_len);
3516 	un->un_f_cfg_cdda = (sense_page[5] & 0x01) ? TRUE : FALSE;
3517 
3518 	/* See if writing DVD RAM is supported. */
3519 	un->un_f_dvdram_writable_device = (sense_page[3] & 0x20) ? TRUE : FALSE;
3520 	if (un->un_f_dvdram_writable_device == TRUE) {
3521 		kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3522 		return;
3523 	}
3524 
3525 	/*
3526 	 * If the device presents DVD or CD capabilities in the mode
3527 	 * page, we can return here since a RRD will not have
3528 	 * these capabilities.
3529 	 */
3530 	if ((sense_page[2] & 0x3f) || (sense_page[3] & 0x3f)) {
3531 		kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3532 		return;
3533 	}
3534 	kmem_free(buf, BUFLEN_MODE_CDROM_CAP);
3535 
3536 	/*
3537 	 * If un->un_f_dvdram_writable_device is still FALSE,
3538 	 * check for a Removable Rigid Disk (RRD).  A RRD
3539 	 * device is identified by the features RANDOM_WRITABLE and
3540 	 * HARDWARE_DEFECT_MANAGEMENT.
3541 	 */
3542 	out_data_rw = kmem_zalloc(SD_CURRENT_FEATURE_LEN, KM_SLEEP);
3543 	rqbuf_rw = kmem_zalloc(SENSE_LENGTH, KM_SLEEP);
3544 
3545 	rtn = sd_send_scsi_feature_GET_CONFIGURATION(ssc, &com, rqbuf_rw,
3546 	    SENSE_LENGTH, out_data_rw, SD_CURRENT_FEATURE_LEN,
3547 	    RANDOM_WRITABLE, SD_PATH_STANDARD);
3548 
3549 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3550 
3551 	if (rtn != 0) {
3552 		kmem_free(out_data_rw, SD_CURRENT_FEATURE_LEN);
3553 		kmem_free(rqbuf_rw, SENSE_LENGTH);
3554 		return;
3555 	}
3556 
3557 	out_data_hd = kmem_zalloc(SD_CURRENT_FEATURE_LEN, KM_SLEEP);
3558 	rqbuf_hd = kmem_zalloc(SENSE_LENGTH, KM_SLEEP);
3559 
3560 	rtn = sd_send_scsi_feature_GET_CONFIGURATION(ssc, &com, rqbuf_hd,
3561 	    SENSE_LENGTH, out_data_hd, SD_CURRENT_FEATURE_LEN,
3562 	    HARDWARE_DEFECT_MANAGEMENT, SD_PATH_STANDARD);
3563 
3564 	sd_ssc_assessment(ssc, SD_FMT_IGNORE);
3565 
3566 	if (rtn == 0) {
3567 		/*
3568 		 * We have good information, check for random writable
3569 		 * and hardware defect features.
3570 		 */
3571 		if ((out_data_rw[9] & RANDOM_WRITABLE) &&
3572 		    (out_data_hd[9] & HARDWARE_DEFECT_MANAGEMENT)) {
3573 			un->un_f_dvdram_writable_device = TRUE;
3574 		}
3575 	}
3576 
3577 	kmem_free(out_data_rw, SD_CURRENT_FEATURE_LEN);
3578 	kmem_free(rqbuf_rw, SENSE_LENGTH);
3579 	kmem_free(out_data_hd, SD_CURRENT_FEATURE_LEN);
3580 	kmem_free(rqbuf_hd, SENSE_LENGTH);
3581 }
3582 
3583 /*
3584  *    Function: sd_check_for_writable_cd
3585  *
3586  * Description: This routine determines if the media in the device is
3587  *		writable or not. It uses the get configuration command (0x46)
3588  *		to determine if the media is writable
3589  *
3590  *   Arguments: un - driver soft state (unit) structure
3591  *              path_flag - SD_PATH_DIRECT to use the USCSI "direct"
3592  *                           chain and the normal command waitq, or
3593  *                           SD_PATH_DIRECT_PRIORITY to use the USCSI
3594  *                           "direct" chain and bypass the normal command
3595  *                           waitq.
3596  *
3597  *     Context: Never called at interrupt context.
3598  */
3599 
3600 static void
3601 sd_check_for_writable_cd(sd_ssc_t *ssc, int path_flag)
3602 {
3603 	struct uscsi_cmd		com;
3604 	uchar_t				*out_data;
3605 	uchar_t				*rqbuf;
3606 	int				rtn;
3607 	uchar_t				*out_d