1/*	$OpenBSD: scsiconf.h,v 1.202 2023/05/10 15:28:26 krw Exp $	*/
2/*	$NetBSD: scsiconf.h,v 1.35 1997/04/02 02:29:38 mycroft Exp $	*/
3
4/*
5 * Copyright (c) 1993, 1994, 1995 Charles Hannum.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by Charles Hannum.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*
34 * Originally written by Julian Elischer (julian@tfs.com)
35 * for TRW Financial Systems for use under the MACH(2.5) operating system.
36 *
37 * TRW Financial Systems, in accordance with their agreement with Carnegie
38 * Mellon University, makes this software available to CMU to distribute
39 * or use in any manner that they see fit as long as this message is kept with
40 * the software. For this reason TFS also grants any other persons or
41 * organisations permission to use or modify this software.
42 *
43 * TFS supplies this software to be publicly redistributed
44 * on the understanding that TFS is not responsible for the correct
45 * functioning of this software in any circumstances.
46 *
47 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
48 */
49
50#ifndef	_SCSI_SCSICONF_H
51#define _SCSI_SCSICONF_H
52
53#include <sys/queue.h>
54#include <sys/timeout.h>
55#include <sys/mutex.h>
56
57static __inline void _lto2b(u_int32_t val, u_int8_t *bytes);
58static __inline void _lto3b(u_int32_t val, u_int8_t *bytes);
59static __inline void _lto4b(u_int32_t val, u_int8_t *bytes);
60static __inline void _lto8b(u_int64_t val, u_int8_t *bytes);
61static __inline u_int32_t _2btol(u_int8_t *bytes);
62static __inline u_int32_t _3btol(u_int8_t *bytes);
63static __inline u_int32_t _4btol(u_int8_t *bytes);
64static __inline u_int64_t _5btol(u_int8_t *bytes);
65static __inline u_int64_t _8btol(u_int8_t *bytes);
66
67static __inline void
68_lto2b(u_int32_t val, u_int8_t *bytes)
69{
70
71	bytes[0] = (val >> 8) & 0xff;
72	bytes[1] = val & 0xff;
73}
74
75static __inline void
76_lto3b(u_int32_t val, u_int8_t *bytes)
77{
78
79	bytes[0] = (val >> 16) & 0xff;
80	bytes[1] = (val >> 8) & 0xff;
81	bytes[2] = val & 0xff;
82}
83
84static __inline void
85_lto4b(u_int32_t val, u_int8_t *bytes)
86{
87
88	bytes[0] = (val >> 24) & 0xff;
89	bytes[1] = (val >> 16) & 0xff;
90	bytes[2] = (val >> 8) & 0xff;
91	bytes[3] = val & 0xff;
92}
93
94static __inline void
95_lto8b(u_int64_t val, u_int8_t *bytes)
96{
97
98	bytes[0] = (val >> 56) & 0xff;
99	bytes[1] = (val >> 48) & 0xff;
100	bytes[2] = (val >> 40) & 0xff;
101	bytes[3] = (val >> 32) & 0xff;
102	bytes[4] = (val >> 24) & 0xff;
103	bytes[5] = (val >> 16) & 0xff;
104	bytes[6] = (val >> 8) & 0xff;
105	bytes[7] = val & 0xff;
106}
107
108static __inline u_int32_t
109_2btol(u_int8_t *bytes)
110{
111	u_int32_t rv;
112
113	rv = (bytes[0] << 8) | bytes[1];
114	return rv;
115}
116
117static __inline u_int32_t
118_3btol(u_int8_t *bytes)
119{
120	u_int32_t rv;
121
122	rv = (bytes[0] << 16) | (bytes[1] << 8) | bytes[2];
123	return rv;
124}
125
126static __inline u_int32_t
127_4btol(u_int8_t *bytes)
128{
129	u_int32_t rv;
130
131	rv = (bytes[0] << 24) | (bytes[1] << 16) |
132	    (bytes[2] << 8) | bytes[3];
133	return rv;
134}
135
136static __inline u_int64_t
137_5btol(u_int8_t *bytes)
138{
139	u_int64_t rv;
140
141	rv = ((u_int64_t)bytes[0] << 32) |
142	     ((u_int64_t)bytes[1] << 24) |
143	     ((u_int64_t)bytes[2] << 16) |
144	     ((u_int64_t)bytes[3] << 8) |
145	     (u_int64_t)bytes[4];
146	return rv;
147}
148
149static __inline u_int64_t
150_8btol(u_int8_t *bytes)
151{
152	u_int64_t rv;
153
154	rv = (((u_int64_t)bytes[0]) << 56) |
155	    (((u_int64_t)bytes[1]) << 48) |
156	    (((u_int64_t)bytes[2]) << 40) |
157	    (((u_int64_t)bytes[3]) << 32) |
158	    (((u_int64_t)bytes[4]) << 24) |
159	    (((u_int64_t)bytes[5]) << 16) |
160	    (((u_int64_t)bytes[6]) << 8) |
161	    ((u_int64_t)bytes[7]);
162	return rv;
163}
164
165#ifdef _KERNEL
166
167#define DEVID_NONE	0
168#define DEVID_NAA	1
169#define DEVID_EUI	2
170#define DEVID_T10	3
171#define DEVID_SERIAL	4
172#define DEVID_WWN	5
173
174struct devid {
175	u_int8_t	d_type;
176	u_int8_t	d_flags;
177#define DEVID_F_PRINT		(1<<0)
178	u_int8_t	d_refcount;
179	u_int8_t	d_len;
180
181	/*
182	 * the devid struct is basically a header, the actual id is allocated
183	 * immediately after it.
184	 */
185};
186
187#define DEVID_CMP(_a, _b) (					\
188	(_a) != NULL && (_b) != NULL &&				\
189	((_a) == (_b) ||					\
190	((_a)->d_type != DEVID_NONE &&				\
191	 (_a)->d_type == (_b)->d_type &&			\
192	 (_a)->d_len == (_b)->d_len &&				\
193	 bcmp((_a) + 1, (_b) + 1, (_a)->d_len) == 0))		\
194)
195
196struct devid *	devid_alloc(u_int8_t, u_int8_t, u_int8_t, u_int8_t *);
197struct devid *	devid_copy(struct devid *);
198void		devid_free(struct devid *);
199
200/*
201 * Each existing device (scsibus + target + lun)
202 *    - is described by a scsi_link struct.
203 * Each scsi_link struct
204 *    - identifies the device's softc and scsi_adapter.
205 * Each scsi_adapter struct
206 *    - contains pointers to the device's scsi functions.
207 * Each scsibus_softc has an SLIST
208 *    - holding pointers to the scsi_link structs of devices on that scsi bus.
209 * Each individual device
210 *    - knows the address of its scsi_link structure.
211 */
212
213struct scsi_xfer;
214struct scsi_link;
215struct scsibus_softc;
216
217/*
218 * Temporary hack
219 */
220extern int scsi_autoconf;
221
222/*
223 * These entrypoints are called by the high-end drivers to get services from
224 * whatever low-end drivers they are attached to.  Each adapter type has one
225 * of these statically allocated.
226 */
227struct scsi_adapter {
228	void		(*scsi_cmd)(struct scsi_xfer *);
229	void		(*dev_minphys)(struct buf *, struct scsi_link *);
230	int		(*dev_probe)(struct scsi_link *);
231	void		(*dev_free)(struct scsi_link *);
232	int		(*ioctl)(struct scsi_link *, u_long, caddr_t, int);
233};
234
235struct scsi_iopool;
236
237struct scsi_iohandler {
238	TAILQ_ENTRY(scsi_iohandler) q_entry;
239	u_int q_state;
240
241	struct scsi_iopool *pool;
242	void (*handler)(void *, void *);
243	void *cookie;
244};
245TAILQ_HEAD(scsi_runq, scsi_iohandler);
246
247struct scsi_iopool {
248	/* access to the IOs */
249	void	*iocookie;
250	/*
251	 * Get an IO. This must reserve all resources that are necessary
252	 * to send the transfer to the device. The resources must stay
253	 * reserved during the lifetime of the IO, as the IO may be re-used
254	 * without being io_put(), first.
255	 */
256	void	*(*io_get)(void *);
257	void	 (*io_put)(void *, void *);
258
259	/* the runqueue */
260	struct scsi_runq queue;
261	/* runqueue semaphore */
262	u_int running;
263	/* protection for the runqueue and its semaphore */
264	struct mutex mtx;
265};
266
267struct scsi_xshandler {
268	struct scsi_iohandler ioh; /* must be first */
269
270	struct scsi_link *link;
271	void (*handler)(struct scsi_xfer *);
272};
273
274/*
275 * This structure describes the connection between an adapter driver and
276 * a device driver, and is used by each to call services provided by
277 * the other, and to allow generic scsi glue code to call these services
278 * as well.
279 */
280struct scsi_link {
281	SLIST_ENTRY(scsi_link)	bus_list;
282
283	u_int		state;
284#define SDEV_S_DYING		(1<<1)
285
286	u_int16_t target;		/* targ of this dev */
287	u_int16_t lun;			/* lun of this dev */
288	u_int16_t openings;		/* available operations per lun */
289	u_int64_t port_wwn;		/* world wide name of port */
290	u_int64_t node_wwn;		/* world wide name of node */
291	u_int16_t flags;		/* flags that all devices have */
292#define	SDEV_REMOVABLE		0x0001	/* media is removable */
293#define	SDEV_MEDIA_LOADED	0x0002	/* device figures are still valid */
294#define	SDEV_READONLY		0x0004	/* device is read-only */
295#define	SDEV_OPEN		0x0008	/* at least 1 open session */
296#define	SDEV_DBX		0x00f0	/* debugging flags (scsi_debug.h) */
297#define	SDEV_EJECTING		0x0100	/* eject on device close */
298#define	SDEV_ATAPI		0x0200	/* device is ATAPI */
299#define SDEV_UMASS		0x0400	/* device is UMASS SCSI */
300#define SDEV_VIRTUAL		0x0800	/* device is virtualised on the hba */
301#define SDEV_OWN_IOPL		0x1000	/* scsibus */
302#define SDEV_UFI		0x2000	/* Universal Floppy Interface */
303	u_int16_t quirks;		/* per-device oddities */
304#define	SDEV_AUTOSAVE		0x0001	/* do implicit SAVEDATAPOINTER on disconnect */
305#define	SDEV_NOSYNC		0x0002	/* does not grok SDTR */
306#define	SDEV_NOWIDE		0x0004	/* does not grok WDTR */
307#define	SDEV_NOTAGS		0x0008	/* lies about having tagged queueing */
308#define	SDEV_NOSYNCCACHE	0x0010	/* no SYNCHRONIZE_CACHE */
309#define	ADEV_NOSENSE		0x0020	/* No request sense - ATAPI */
310#define	ADEV_LITTLETOC		0x0040	/* little-endian TOC - ATAPI */
311#define	ADEV_NOCAPACITY		0x0080	/* no READ CD CAPACITY */
312#define	ADEV_NODOORLOCK		0x0100	/* can't lock door */
313	int	(*interpret_sense)(struct scsi_xfer *);
314	void	*device_softc;		/* needed for call to foo_start */
315	struct	scsibus_softc *bus;	/* link to the scsibus we're on */
316	struct	scsi_inquiry_data inqdata; /* copy of INQUIRY data from probe */
317	struct  devid *id;
318
319	struct	scsi_runq queue;
320	u_int	running;
321	u_short	pending;
322
323	struct	scsi_iopool *pool;
324};
325
326int	scsiprint(void *, const char *);
327
328/*
329 * This describes matching information for scsi_inqmatch().  The more things
330 * match, the higher the configuration priority.
331 */
332struct scsi_inquiry_pattern {
333	u_int8_t type;
334	int removable;
335	char *vendor;
336	char *product;
337	char *revision;
338};
339
340struct scsibus_attach_args {
341	const struct scsi_adapter *saa_adapter;
342	void			*saa_adapter_softc;
343	struct	scsi_iopool	*saa_pool;
344	u_int64_t		 saa_wwpn;
345	u_int64_t		 saa_wwnn;
346	u_int16_t		 saa_quirks;
347	u_int16_t		 saa_flags;
348	u_int16_t		 saa_openings;
349	u_int16_t		 saa_adapter_target;
350#define	SDEV_NO_ADAPTER_TARGET	0xffff
351	u_int16_t		 saa_adapter_buswidth;
352	u_int8_t		 saa_luns;
353};
354
355/*
356 * One of these is allocated and filled in for each scsi bus.
357 * It holds pointers to allow the scsi bus to get to the driver
358 * that is running each LUN on the bus.
359 * It also has a template entry which is the prototype struct
360 * supplied by the adapter driver.  This is used to initialise
361 * the others, before they have the rest of the fields filled in.
362 */
363struct scsibus_softc {
364	struct device		 sc_dev;
365	SLIST_HEAD(, scsi_link)  sc_link_list;
366	void			*sb_adapter_softc;
367	const struct scsi_adapter *sb_adapter;
368	struct	scsi_iopool	*sb_pool;
369	u_int16_t		 sb_quirks;
370	u_int16_t		 sb_flags;
371	u_int16_t		 sb_openings;
372	u_int16_t		 sb_adapter_buswidth;
373	u_int16_t		 sb_adapter_target;
374	u_int8_t		 sb_luns;
375};
376
377/*
378 * This is used to pass information from the high-level configuration code
379 * to the device-specific drivers.
380 */
381struct scsi_attach_args {
382	struct scsi_link *sa_sc_link;
383};
384
385/*
386 * Each scsi transaction is fully described by one of these structures.
387 * It includes information about the source of the command and also the
388 * device and adapter for which the command is destined.
389 * (via the scsi_link structure)
390 */
391struct scsi_xfer {
392	SIMPLEQ_ENTRY(scsi_xfer) xfer_list;
393	int	flags;
394	struct	scsi_link *sc_link;	/* all about our device and adapter */
395	int	retries;		/* the number of times to retry */
396	int	timeout;		/* in milliseconds */
397	struct	scsi_generic cmd;	/* The scsi command to execute */
398	int	cmdlen;			/* how long it is */
399	u_char	*data;			/* dma address OR a uio address */
400	int	datalen;		/* data len (blank if uio)    */
401	size_t	resid;			/* how much buffer was not touched */
402	int	error;			/* an error value	*/
403	struct	buf *bp;		/* If we need to associate with a buf */
404	struct	scsi_sense_data	sense;	/* 18 bytes*/
405	u_int8_t status;		/* SCSI status */
406	/*
407	 * timeout structure for hba's to use for a command
408	 */
409	struct timeout stimeout;
410	void *cookie;
411	void (*done)(struct scsi_xfer *);
412
413	void *io;			/* adapter io resource */
414};
415SIMPLEQ_HEAD(scsi_xfer_list, scsi_xfer);
416
417/*
418 * Per-request Flag values
419 */
420#define	SCSI_NOSLEEP	0x00001	/* don't sleep */
421#define	SCSI_POLL	0x00002	/* poll for completion */
422#define	SCSI_AUTOCONF	0x00003	/* shorthand for SCSI_POLL | SCSI_NOSLEEP */
423#define	ITSDONE		0x00008	/* the transfer is as done as it gets	*/
424#define	SCSI_SILENT	0x00020	/* don't announce NOT READY or MEDIA CHANGE */
425#define	SCSI_IGNORE_NOT_READY		0x00040	/* ignore NOT READY */
426#define	SCSI_IGNORE_MEDIA_CHANGE	0x00080	/* ignore MEDIA CHANGE */
427#define	SCSI_IGNORE_ILLEGAL_REQUEST	0x00100	/* ignore ILLEGAL REQUEST */
428#define	SCSI_RESET	0x00200	/* Reset the device in question		*/
429#define	SCSI_DATA_IN	0x00800	/* expect data to come INTO memory	*/
430#define	SCSI_DATA_OUT	0x01000	/* expect data to flow OUT of memory	*/
431#define	SCSI_TARGET	0x02000	/* This defines a TARGET mode op.	*/
432#define	SCSI_ESCAPE	0x04000	/* Escape operation			*/
433#define	SCSI_PRIVATE	0xf0000	/* private to each HBA flags */
434
435/*
436 * Escape op-codes.  This provides an extensible setup for operations
437 * that are not scsi commands.  They are intended for modal operations.
438 */
439
440#define SCSI_OP_TARGET	0x0001
441#define	SCSI_OP_RESET	0x0002
442#define	SCSI_OP_BDINFO	0x0003
443
444/*
445 * Error values an adapter driver may return
446 */
447#define XS_NOERROR	0	/* there is no error, (sense is invalid)  */
448#define XS_SENSE	1	/* Check the returned sense for the error */
449#define	XS_DRIVER_STUFFUP 2	/* Driver failed to perform operation	  */
450#define XS_SELTIMEOUT	3	/* The device timed out.. turned off?	  */
451#define XS_TIMEOUT	4	/* The Timeout reported was caught by SW  */
452#define XS_BUSY		5	/* The device busy, try again later?	  */
453#define XS_SHORTSENSE   6	/* Check the ATAPI sense for the error */
454#define XS_RESET	8	/* bus was reset; possible retry command  */
455
456/*
457 * Possible retries for scsi_test_unit_ready()
458 */
459#define TEST_READY_RETRIES	5
460
461/*
462 * Possible retries for most SCSI commands.
463 */
464#define SCSI_RETRIES		4
465
466const void *scsi_inqmatch(struct scsi_inquiry_data *, const void *, int,
467	    int, int *);
468
469void	scsi_init(void);
470int	scsi_test_unit_ready(struct scsi_link *, int, int);
471int	scsi_inquire(struct scsi_link *, struct scsi_inquiry_data *, int);
472int	scsi_read_cap_10(struct scsi_link *, struct scsi_read_cap_data *, int);
473int	scsi_read_cap_16(struct scsi_link *, struct scsi_read_cap_data_16 *,
474	    int);
475int	scsi_inquire_vpd(struct scsi_link *, void *, u_int, u_int8_t, int);
476void	scsi_init_inquiry(struct scsi_xfer *, u_int8_t, u_int8_t,
477	    void *, size_t);
478int	scsi_prevent(struct scsi_link *, int, int);
479int	scsi_start(struct scsi_link *, int, int);
480void	scsi_parse_blkdesc(struct scsi_link *, union scsi_mode_sense_buf *, int,
481	    u_int32_t *, u_int64_t *, u_int32_t *);
482int	scsi_do_mode_sense(struct scsi_link *, int,
483	    union scsi_mode_sense_buf *, void **, int, int, int *);
484void	scsi_parse_blkdesc(struct scsi_link *, union scsi_mode_sense_buf *, int,
485	    u_int32_t *, u_int64_t *, u_int32_t *);
486int	scsi_mode_select(struct scsi_link *, int, struct scsi_mode_header *,
487	    int, int);
488int	scsi_mode_select_big(struct scsi_link *, int,
489	    struct scsi_mode_header_big *, int, int);
490void	scsi_copy_internal_data(struct scsi_xfer *, void *, size_t);
491void	scsi_done(struct scsi_xfer *);
492int	scsi_do_ioctl(struct scsi_link *, u_long, caddr_t, int);
493void	sc_print_addr(struct scsi_link *);
494int	scsi_report_luns(struct scsi_link *, int,
495	    struct scsi_report_luns_data *, u_int32_t, int, int);
496int	scsi_interpret_sense(struct scsi_xfer *);
497
498void	scsi_print_sense(struct scsi_xfer *);
499void	scsi_strvis(u_char *, u_char *, int);
500int	scsi_delay(struct scsi_xfer *, int);
501
502int	scsi_probe(struct scsibus_softc *, int, int);
503int	scsi_probe_bus(struct scsibus_softc *);
504int	scsi_probe_target(struct scsibus_softc *, int);
505int	scsi_probe_lun(struct scsibus_softc *, int, int);
506
507int	scsi_detach(struct scsibus_softc *, int, int, int);
508int	scsi_detach_target(struct scsibus_softc *, int, int);
509int	scsi_detach_lun(struct scsibus_softc *, int, int, int);
510
511int	scsi_req_probe(struct scsibus_softc *, int, int);
512int	scsi_req_detach(struct scsibus_softc *, int, int, int);
513
514int	scsi_activate(struct scsibus_softc *, int, int, int);
515
516struct scsi_link *	scsi_get_link(struct scsibus_softc *, int, int);
517
518#define SID_ANSII_REV(x)	((x)->version & SID_ANSII)
519#define SID_RESPONSE_FORMAT(x)	((x)->response_format & SID_RESPONSE_DATA_FMT)
520
521#define SCSI_REV_0	0x00	/* No conformance to any standard. */
522#define SCSI_REV_1	0x01	/* (Obsolete) SCSI-1 in olden times. */
523#define SCSI_REV_2	0x02	/* (Obsolete) SCSI-2 in olden times. */
524#define SCSI_REV_SPC	0x03	/* ANSI INCITS 301-1997 (SPC).	*/
525#define SCSI_REV_SPC2	0x04	/* ANSI INCITS 351-2001 (SPC-2)	*/
526#define SCSI_REV_SPC3	0x05	/* ANSI INCITS 408-2005 (SPC-3)	*/
527#define SCSI_REV_SPC4	0x06	/* ANSI INCITS 513-2015 (SPC-4)	*/
528#define SCSI_REV_SPC5	0x07	/* T10/BSR INCITS 503   (SPC-5)	*/
529
530struct scsi_xfer *	scsi_xs_get(struct scsi_link *, int);
531void			scsi_xs_exec(struct scsi_xfer *);
532int			scsi_xs_sync(struct scsi_xfer *);
533void			scsi_xs_put(struct scsi_xfer *);
534
535/*
536 * iopool stuff
537 */
538void	scsi_iopool_init(struct scsi_iopool *, void *,
539	    void *(*)(void *), void (*)(void *, void *));
540void	scsi_iopool_run(struct scsi_iopool *);
541void	scsi_iopool_destroy(struct scsi_iopool *);
542void	scsi_link_shutdown(struct scsi_link *);
543
544void *	scsi_io_get(struct scsi_iopool *, int);
545void	scsi_io_put(struct scsi_iopool *, void *);
546
547/*
548 * default io allocator.
549 */
550#define SCSI_IOPOOL_POISON ((void *)0x5c5)
551void *	scsi_default_get(void *);
552void	scsi_default_put(void *, void *);
553
554/*
555 * io handler interface
556 */
557void	scsi_ioh_set(struct scsi_iohandler *, struct scsi_iopool *,
558	    void (*)(void *, void *), void *);
559int	scsi_ioh_add(struct scsi_iohandler *);
560int	scsi_ioh_del(struct scsi_iohandler *);
561
562void	scsi_xsh_set(struct scsi_xshandler *, struct scsi_link *,
563	    void (*)(struct scsi_xfer *));
564int	scsi_xsh_add(struct scsi_xshandler *);
565int	scsi_xsh_del(struct scsi_xshandler *);
566
567/*
568 * utility functions
569 */
570int	scsi_pending_start(struct mutex *, u_int *);
571int	scsi_pending_finish(struct mutex *, u_int *);
572
573/*
574 * Utility functions for SCSI HBA emulation.
575 */
576void	scsi_cmd_rw_decode(struct scsi_generic *, u_int64_t *, u_int32_t *);
577
578#endif /* _KERNEL */
579#endif /* _SCSI_SCSICONF_H */
580