scsi_pt.c revision 74840 
1/*
2 * Implementation of SCSI Processor Target Peripheral driver for CAM.
3 *
4 * Copyright (c) 1998 Justin T. Gibbs.
5 * 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 *    without modification, immediately at the beginning of the file.
13 * 2. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: head/sys/cam/scsi/scsi_pt.c 74840 2001-03-27 05:45:52Z ken $
29 */
30
31#include <sys/param.h>
32#include <sys/queue.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/types.h>
36#include <sys/bio.h>
37#include <sys/devicestat.h>
38#include <sys/malloc.h>
39#include <sys/conf.h>
40#include <sys/ptio.h>
41
42#include <cam/cam.h>
43#include <cam/cam_ccb.h>
44#include <cam/cam_extend.h>
45#include <cam/cam_periph.h>
46#include <cam/cam_xpt_periph.h>
47#include <cam/cam_debug.h>
48
49#include <cam/scsi/scsi_all.h>
50#include <cam/scsi/scsi_message.h>
51#include <cam/scsi/scsi_pt.h>
52
53#include "opt_pt.h"
54
55typedef enum {
56	PT_STATE_PROBE,
57	PT_STATE_NORMAL
58} pt_state;
59
60typedef enum {
61	PT_FLAG_NONE		= 0x00,
62	PT_FLAG_OPEN		= 0x01,
63	PT_FLAG_DEVICE_INVALID	= 0x02,
64	PT_FLAG_RETRY_UA	= 0x04
65} pt_flags;
66
67typedef enum {
68	PT_CCB_BUFFER_IO	= 0x01,
69	PT_CCB_WAITING		= 0x02,
70	PT_CCB_RETRY_UA		= 0x04,
71	PT_CCB_BUFFER_IO_UA	= PT_CCB_BUFFER_IO|PT_CCB_RETRY_UA
72} pt_ccb_state;
73
74/* Offsets into our private area for storing information */
75#define ccb_state	ppriv_field0
76#define ccb_bp		ppriv_ptr1
77
78struct pt_softc {
79	struct	 bio_queue_head bio_queue;
80	struct	 devstat device_stats;
81	LIST_HEAD(, ccb_hdr) pending_ccbs;
82	pt_state state;
83	pt_flags flags;
84	union	 ccb saved_ccb;
85	int	 io_timeout;
86	dev_t	 dev;
87};
88
89static	d_open_t	ptopen;
90static	d_close_t	ptclose;
91static	d_strategy_t	ptstrategy;
92static	periph_init_t	ptinit;
93static	void		ptasync(void *callback_arg, u_int32_t code,
94				struct cam_path *path, void *arg);
95static	periph_ctor_t	ptctor;
96static	periph_oninv_t	ptoninvalidate;
97static	periph_dtor_t	ptdtor;
98static	periph_start_t	ptstart;
99static	void		ptdone(struct cam_periph *periph,
100			       union ccb *done_ccb);
101static	d_ioctl_t	ptioctl;
102static  int		pterror(union ccb *ccb, u_int32_t cam_flags,
103				u_int32_t sense_flags);
104
105void	scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries,
106			  void (*cbfcnp)(struct cam_periph *, union ccb *),
107			  u_int tag_action, int readop, u_int byte2,
108			  u_int32_t xfer_len, u_int8_t *data_ptr,
109			  u_int8_t sense_len, u_int32_t timeout);
110
111static struct periph_driver ptdriver =
112{
113	ptinit, "pt",
114	TAILQ_HEAD_INITIALIZER(ptdriver.units), /* generation */ 0
115};
116
117PERIPHDRIVER_DECLARE(pt, ptdriver);
118
119#define PT_CDEV_MAJOR 61
120
121static struct cdevsw pt_cdevsw = {
122	/* open */	ptopen,
123	/* close */	ptclose,
124	/* read */	physread,
125	/* write */	physwrite,
126	/* ioctl */	ptioctl,
127	/* poll */	nopoll,
128	/* mmap */	nommap,
129	/* strategy */	ptstrategy,
130	/* name */	"pt",
131	/* maj */	PT_CDEV_MAJOR,
132	/* dump */	nodump,
133	/* psize */	nopsize,
134	/* flags */	0,
135};
136
137static struct extend_array *ptperiphs;
138
139#ifndef SCSI_PT_DEFAULT_TIMEOUT
140#define SCSI_PT_DEFAULT_TIMEOUT		60
141#endif
142
143static int
144ptopen(dev_t dev, int flags, int fmt, struct proc *p)
145{
146	struct cam_periph *periph;
147	struct pt_softc *softc;
148	int unit;
149	int error;
150	int s;
151
152	unit = minor(dev);
153	periph = cam_extend_get(ptperiphs, unit);
154	if (periph == NULL)
155		return (ENXIO);
156
157	softc = (struct pt_softc *)periph->softc;
158
159	s = splsoftcam();
160	if (softc->flags & PT_FLAG_DEVICE_INVALID) {
161		splx(s);
162		return(ENXIO);
163	}
164
165	CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
166	    ("ptopen: dev=%s (unit %d)\n", devtoname(dev), unit));
167
168	if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
169		splx(s);
170		return (error); /* error code from tsleep */
171	}
172
173	splx(s);
174
175	if ((softc->flags & PT_FLAG_OPEN) == 0) {
176		if (cam_periph_acquire(periph) != CAM_REQ_CMP)
177			error = ENXIO;
178		else
179			softc->flags |= PT_FLAG_OPEN;
180	} else
181		error = EBUSY;
182
183	cam_periph_unlock(periph);
184	return (error);
185}
186
187static int
188ptclose(dev_t dev, int flag, int fmt, struct proc *p)
189{
190	struct	cam_periph *periph;
191	struct	pt_softc *softc;
192	int	unit;
193	int	error;
194
195	unit = minor(dev);
196	periph = cam_extend_get(ptperiphs, unit);
197	if (periph == NULL)
198		return (ENXIO);
199
200	softc = (struct pt_softc *)periph->softc;
201
202	if ((error = cam_periph_lock(periph, PRIBIO)) != 0)
203		return (error); /* error code from tsleep */
204
205	softc->flags &= ~PT_FLAG_OPEN;
206	cam_periph_unlock(periph);
207	cam_periph_release(periph);
208	return (0);
209}
210
211/*
212 * Actually translate the requested transfer into one the physical driver
213 * can understand.  The transfer is described by a buf and will include
214 * only one physical transfer.
215 */
216static void
217ptstrategy(struct bio *bp)
218{
219	struct cam_periph *periph;
220	struct pt_softc *softc;
221	u_int  unit;
222	int    s;
223
224	unit = minor(bp->bio_dev);
225	periph = cam_extend_get(ptperiphs, unit);
226	if (periph == NULL) {
227		bp->bio_error = ENXIO;
228		goto bad;
229	}
230	softc = (struct pt_softc *)periph->softc;
231
232	/*
233	 * Mask interrupts so that the pack cannot be invalidated until
234	 * after we are in the queue.  Otherwise, we might not properly
235	 * clean up one of the buffers.
236	 */
237	s = splbio();
238
239	/*
240	 * If the device has been made invalid, error out
241	 */
242	if ((softc->flags & PT_FLAG_DEVICE_INVALID)) {
243		splx(s);
244		bp->bio_error = ENXIO;
245		goto bad;
246	}
247
248	/*
249	 * Place it in the queue of disk activities for this disk
250	 */
251	bioq_insert_tail(&softc->bio_queue, bp);
252
253	splx(s);
254
255	/*
256	 * Schedule ourselves for performing the work.
257	 */
258	xpt_schedule(periph, /* XXX priority */1);
259
260	return;
261bad:
262	bp->bio_flags |= BIO_ERROR;
263
264	/*
265	 * Correctly set the buf to indicate a completed xfer
266	 */
267	bp->bio_resid = bp->bio_bcount;
268	biodone(bp);
269}
270
271static void
272ptinit(void)
273{
274	cam_status status;
275	struct cam_path *path;
276
277	/*
278	 * Create our extend array for storing the devices we attach to.
279	 */
280	ptperiphs = cam_extend_new();
281	if (ptperiphs == NULL) {
282		printf("pt: Failed to alloc extend array!\n");
283		return;
284	}
285
286	/*
287	 * Install a global async callback.  This callback will
288	 * receive async callbacks like "new device found".
289	 */
290	status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
291				 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
292
293	if (status == CAM_REQ_CMP) {
294		struct ccb_setasync csa;
295
296                xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
297                csa.ccb_h.func_code = XPT_SASYNC_CB;
298                csa.event_enable = AC_FOUND_DEVICE;
299                csa.callback = ptasync;
300                csa.callback_arg = NULL;
301                xpt_action((union ccb *)&csa);
302		status = csa.ccb_h.status;
303                xpt_free_path(path);
304        }
305
306	if (status != CAM_REQ_CMP) {
307		printf("pt: Failed to attach master async callback "
308		       "due to status 0x%x!\n", status);
309	}
310}
311
312static cam_status
313ptctor(struct cam_periph *periph, void *arg)
314{
315	struct pt_softc *softc;
316	struct ccb_setasync csa;
317	struct ccb_getdev *cgd;
318
319	cgd = (struct ccb_getdev *)arg;
320	if (periph == NULL) {
321		printf("ptregister: periph was NULL!!\n");
322		return(CAM_REQ_CMP_ERR);
323	}
324
325	if (cgd == NULL) {
326		printf("ptregister: no getdev CCB, can't register device\n");
327		return(CAM_REQ_CMP_ERR);
328	}
329
330	softc = (struct pt_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
331
332	if (softc == NULL) {
333		printf("daregister: Unable to probe new device. "
334		       "Unable to allocate softc\n");
335		return(CAM_REQ_CMP_ERR);
336	}
337
338	bzero(softc, sizeof(*softc));
339	LIST_INIT(&softc->pending_ccbs);
340	softc->state = PT_STATE_NORMAL;
341	bioq_init(&softc->bio_queue);
342
343	softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000;
344
345	periph->softc = softc;
346
347	cam_extend_set(ptperiphs, periph->unit_number, periph);
348
349	devstat_add_entry(&softc->device_stats, "pt",
350			  periph->unit_number, 0,
351			  DEVSTAT_NO_BLOCKSIZE,
352			  SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
353			  DEVSTAT_PRIORITY_OTHER);
354
355	softc->dev = make_dev(&pt_cdevsw, periph->unit_number, UID_ROOT,
356			      GID_OPERATOR, 0600, "%s%d", periph->periph_name,
357			      periph->unit_number);
358	/*
359	 * Add async callbacks for bus reset and
360	 * bus device reset calls.  I don't bother
361	 * checking if this fails as, in most cases,
362	 * the system will function just fine without
363	 * them and the only alternative would be to
364	 * not attach the device on failure.
365	 */
366	xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5);
367	csa.ccb_h.func_code = XPT_SASYNC_CB;
368	csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE;
369	csa.callback = ptasync;
370	csa.callback_arg = periph;
371	xpt_action((union ccb *)&csa);
372
373	/* Tell the user we've attached to the device */
374	xpt_announce_periph(periph, NULL);
375
376	return(CAM_REQ_CMP);
377}
378
379static void
380ptoninvalidate(struct cam_periph *periph)
381{
382	int s;
383	struct pt_softc *softc;
384	struct bio *q_bp;
385	struct ccb_setasync csa;
386
387	softc = (struct pt_softc *)periph->softc;
388
389	/*
390	 * De-register any async callbacks.
391	 */
392	xpt_setup_ccb(&csa.ccb_h, periph->path,
393		      /* priority */ 5);
394	csa.ccb_h.func_code = XPT_SASYNC_CB;
395	csa.event_enable = 0;
396	csa.callback = ptasync;
397	csa.callback_arg = periph;
398	xpt_action((union ccb *)&csa);
399
400	softc->flags |= PT_FLAG_DEVICE_INVALID;
401
402	/*
403	 * Although the oninvalidate() routines are always called at
404	 * splsoftcam, we need to be at splbio() here to keep the buffer
405	 * queue from being modified while we traverse it.
406	 */
407	s = splbio();
408
409	/*
410	 * Return all queued I/O with ENXIO.
411	 * XXX Handle any transactions queued to the card
412	 *     with XPT_ABORT_CCB.
413	 */
414	while ((q_bp = bioq_first(&softc->bio_queue)) != NULL){
415		bioq_remove(&softc->bio_queue, q_bp);
416		q_bp->bio_resid = q_bp->bio_bcount;
417		q_bp->bio_error = ENXIO;
418		q_bp->bio_flags |= BIO_ERROR;
419		biodone(q_bp);
420	}
421
422	splx(s);
423
424	xpt_print_path(periph->path);
425	printf("lost device\n");
426}
427
428static void
429ptdtor(struct cam_periph *periph)
430{
431	struct pt_softc *softc;
432
433	softc = (struct pt_softc *)periph->softc;
434
435	devstat_remove_entry(&softc->device_stats);
436
437	destroy_dev(softc->dev);
438
439	cam_extend_release(ptperiphs, periph->unit_number);
440	xpt_print_path(periph->path);
441	printf("removing device entry\n");
442	free(softc, M_DEVBUF);
443}
444
445static void
446ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
447{
448	struct cam_periph *periph;
449
450	periph = (struct cam_periph *)callback_arg;
451	switch (code) {
452	case AC_FOUND_DEVICE:
453	{
454		struct ccb_getdev *cgd;
455		cam_status status;
456
457		cgd = (struct ccb_getdev *)arg;
458
459		if (SID_TYPE(&cgd->inq_data) != T_PROCESSOR)
460			break;
461
462		/*
463		 * Allocate a peripheral instance for
464		 * this device and start the probe
465		 * process.
466		 */
467		status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor,
468					  ptstart, "pt", CAM_PERIPH_BIO,
469					  cgd->ccb_h.path, ptasync,
470					  AC_FOUND_DEVICE, cgd);
471
472		if (status != CAM_REQ_CMP
473		 && status != CAM_REQ_INPROG)
474			printf("ptasync: Unable to attach to new device "
475				"due to status 0x%x\n", status);
476		break;
477	}
478	case AC_SENT_BDR:
479	case AC_BUS_RESET:
480	{
481		struct pt_softc *softc;
482		struct ccb_hdr *ccbh;
483		int s;
484
485		softc = (struct pt_softc *)periph->softc;
486		s = splsoftcam();
487		/*
488		 * Don't fail on the expected unit attention
489		 * that will occur.
490		 */
491		softc->flags |= PT_FLAG_RETRY_UA;
492		LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
493			ccbh->ccb_state |= PT_CCB_RETRY_UA;
494		splx(s);
495		/* FALLTHROUGH */
496	}
497	default:
498		cam_periph_async(periph, code, path, arg);
499		break;
500	}
501}
502
503static void
504ptstart(struct cam_periph *periph, union ccb *start_ccb)
505{
506	struct pt_softc *softc;
507	struct bio *bp;
508	int s;
509
510	softc = (struct pt_softc *)periph->softc;
511
512	/*
513	 * See if there is a buf with work for us to do..
514	 */
515	s = splbio();
516	bp = bioq_first(&softc->bio_queue);
517	if (periph->immediate_priority <= periph->pinfo.priority) {
518		CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
519				("queuing for immediate ccb\n"));
520		start_ccb->ccb_h.ccb_state = PT_CCB_WAITING;
521		SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
522				  periph_links.sle);
523		periph->immediate_priority = CAM_PRIORITY_NONE;
524		splx(s);
525		wakeup(&periph->ccb_list);
526	} else if (bp == NULL) {
527		splx(s);
528		xpt_release_ccb(start_ccb);
529	} else {
530		int oldspl;
531
532		bioq_remove(&softc->bio_queue, bp);
533
534		devstat_start_transaction(&softc->device_stats);
535
536		scsi_send_receive(&start_ccb->csio,
537				  /*retries*/4,
538				  ptdone,
539				  MSG_SIMPLE_Q_TAG,
540				  bp->bio_cmd == BIO_READ,
541				  /*byte2*/0,
542				  bp->bio_bcount,
543				  bp->bio_data,
544				  /*sense_len*/SSD_FULL_SIZE,
545				  /*timeout*/softc->io_timeout);
546
547		start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO;
548
549		/*
550		 * Block out any asyncronous callbacks
551		 * while we touch the pending ccb list.
552		 */
553		oldspl = splcam();
554		LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h,
555				 periph_links.le);
556		splx(oldspl);
557
558		start_ccb->ccb_h.ccb_bp = bp;
559		bp = bioq_first(&softc->bio_queue);
560		splx(s);
561
562		xpt_action(start_ccb);
563
564		if (bp != NULL) {
565			/* Have more work to do, so ensure we stay scheduled */
566			xpt_schedule(periph, /* XXX priority */1);
567		}
568	}
569}
570
571static void
572ptdone(struct cam_periph *periph, union ccb *done_ccb)
573{
574	struct pt_softc *softc;
575	struct ccb_scsiio *csio;
576
577	softc = (struct pt_softc *)periph->softc;
578	csio = &done_ccb->csio;
579	switch (csio->ccb_h.ccb_state) {
580	case PT_CCB_BUFFER_IO:
581	case PT_CCB_BUFFER_IO_UA:
582	{
583		struct bio *bp;
584		int    oldspl;
585
586		bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
587		if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
588			int error;
589			int s;
590			int sf;
591
592			if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0)
593				sf = SF_RETRY_UA;
594			else
595				sf = 0;
596
597			error = pterror(done_ccb, CAM_RETRY_SELTO, sf);
598			if (error == ERESTART) {
599				/*
600				 * A retry was scheuled, so
601				 * just return.
602				 */
603				return;
604			}
605			if (error != 0) {
606				struct bio *q_bp;
607
608				s = splbio();
609
610				if (error == ENXIO) {
611					/*
612					 * Catastrophic error.  Mark our device
613					 * as invalid.
614					 */
615					xpt_print_path(periph->path);
616					printf("Invalidating device\n");
617					softc->flags |= PT_FLAG_DEVICE_INVALID;
618				}
619
620				/*
621				 * return all queued I/O with EIO, so that
622				 * the client can retry these I/Os in the
623				 * proper order should it attempt to recover.
624				 */
625				while ((q_bp = bioq_first(&softc->bio_queue))
626					!= NULL) {
627					bioq_remove(&softc->bio_queue, q_bp);
628					q_bp->bio_resid = q_bp->bio_bcount;
629					q_bp->bio_error = EIO;
630					q_bp->bio_flags |= BIO_ERROR;
631					biodone(q_bp);
632				}
633				splx(s);
634				bp->bio_error = error;
635				bp->bio_resid = bp->bio_bcount;
636				bp->bio_flags |= BIO_ERROR;
637			} else {
638				bp->bio_resid = csio->resid;
639				bp->bio_error = 0;
640				if (bp->bio_resid != 0) {
641					/* Short transfer ??? */
642					bp->bio_flags |= BIO_ERROR;
643				}
644			}
645			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
646				cam_release_devq(done_ccb->ccb_h.path,
647						 /*relsim_flags*/0,
648						 /*reduction*/0,
649						 /*timeout*/0,
650						 /*getcount_only*/0);
651		} else {
652			bp->bio_resid = csio->resid;
653			if (bp->bio_resid != 0)
654				bp->bio_flags |= BIO_ERROR;
655		}
656
657		/*
658		 * Block out any asyncronous callbacks
659		 * while we touch the pending ccb list.
660		 */
661		oldspl = splcam();
662		LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
663		splx(oldspl);
664
665		devstat_end_transaction_bio(&softc->device_stats, bp);
666		biodone(bp);
667		break;
668	}
669	case PT_CCB_WAITING:
670		/* Caller will release the CCB */
671		wakeup(&done_ccb->ccb_h.cbfcnp);
672		return;
673	}
674	xpt_release_ccb(done_ccb);
675}
676
677static int
678pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
679{
680	struct pt_softc	  *softc;
681	struct cam_periph *periph;
682
683	periph = xpt_path_periph(ccb->ccb_h.path);
684	softc = (struct pt_softc *)periph->softc;
685
686	return(cam_periph_error(ccb, cam_flags, sense_flags,
687				&softc->saved_ccb));
688}
689
690static int
691ptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
692{
693	struct cam_periph *periph;
694	struct pt_softc *softc;
695	int unit;
696	int error;
697
698	unit = minor(dev);
699	periph = cam_extend_get(ptperiphs, unit);
700
701	if (periph == NULL)
702		return(ENXIO);
703
704	softc = (struct pt_softc *)periph->softc;
705
706	if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
707		return (error); /* error code from tsleep */
708	}
709
710	switch(cmd) {
711	case PTIOCGETTIMEOUT:
712		if (softc->io_timeout >= 1000)
713			*(int *)addr = softc->io_timeout / 1000;
714		else
715			*(int *)addr = 0;
716		break;
717	case PTIOCSETTIMEOUT:
718	{
719		int s;
720
721		if (*(int *)addr < 1) {
722			error = EINVAL;
723			break;
724		}
725
726		s = splsoftcam();
727		softc->io_timeout = *(int *)addr * 1000;
728		splx(s);
729
730		break;
731	}
732	default:
733		error = cam_periph_ioctl(periph, cmd, addr, pterror);
734		break;
735	}
736
737	cam_periph_unlock(periph);
738
739	return(error);
740}
741
742void
743scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries,
744		  void (*cbfcnp)(struct cam_periph *, union ccb *),
745		  u_int tag_action, int readop, u_int byte2,
746		  u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len,
747		  u_int32_t timeout)
748{
749	struct scsi_send_receive *scsi_cmd;
750
751	scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes;
752	scsi_cmd->opcode = readop ? RECEIVE : SEND;
753	scsi_cmd->byte2 = byte2;
754	scsi_ulto3b(xfer_len, scsi_cmd->xfer_len);
755	scsi_cmd->control = 0;
756
757	cam_fill_csio(csio,
758		      retries,
759		      cbfcnp,
760		      /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT,
761		      tag_action,
762		      data_ptr,
763		      xfer_len,
764		      sense_len,
765		      sizeof(*scsi_cmd),
766		      timeout);
767}
768