xref: /NextBSD/sys/dev/amr/amr_cam.c (revision eb1a5f8de9f7ea602c373a710f531abbf81141c4)
1 /*-
2  * Copyright (c) 2000 Michael Smith
3  * Copyright (c) 2000 BSDi
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *	notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *	notice, this list of conditions and the following disclaimer in the
13  *	documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 /*-
28  * Copyright (c) 2002 Eric Moore
29  * Copyright (c) 2002 LSI Logic Corporation
30  * All rights reserved.
31  *
32  * Redistribution and use in source and binary forms, with or without
33  * modification, are permitted provided that the following conditions
34  * are met:
35  * 1. Redistributions of source code must retain the above copyright
36  *	notice, this list of conditions and the following disclaimer.
37  * 2. Redistributions in binary form must reproduce the above copyright
38  *	notice, this list of conditions and the following disclaimer in the
39  *	documentation and/or other materials provided with the distribution.
40  * 3. The party using or redistributing the source code and binary forms
41  *	agrees to the disclaimer below and the terms and conditions set forth
42  *	herein.
43  *
44  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54  * SUCH DAMAGE.
55  */
56 
57 #include <sys/cdefs.h>
58 __FBSDID("$FreeBSD$");
59 
60 #include <sys/param.h>
61 #include <sys/systm.h>
62 #include <sys/malloc.h>
63 #include <sys/kernel.h>
64 #include <sys/module.h>
65 
66 #include <sys/bio.h>
67 #include <sys/bus.h>
68 #include <sys/conf.h>
69 #include <sys/stat.h>
70 
71 #include <cam/cam.h>
72 #include <cam/cam_ccb.h>
73 #include <cam/cam_sim.h>
74 #include <cam/cam_xpt.h>
75 #include <cam/cam_xpt_sim.h>
76 #include <cam/cam_debug.h>
77 #include <cam/scsi/scsi_all.h>
78 #include <cam/scsi/scsi_message.h>
79 
80 #include <machine/resource.h>
81 #include <machine/bus.h>
82 
83 #include <dev/amr/amrreg.h>
84 #include <dev/amr/amrvar.h>
85 
86 static int	amr_cam_probe(device_t dev);
87 static int	amr_cam_attach(device_t dev);
88 static int	amr_cam_detach(device_t dev);
89 static void	amr_cam_action(struct cam_sim *sim, union ccb *ccb);
90 static void	amr_cam_poll(struct cam_sim *sim);
91 static void	amr_cam_complete(struct amr_command *ac);
92 static int	amr_cam_command(struct amr_softc *sc, struct amr_command **acp);
93 
94 static devclass_t	amr_pass_devclass;
95 
96 static device_method_t	amr_pass_methods[] = {
97 	DEVMETHOD(device_probe,		amr_cam_probe),
98 	DEVMETHOD(device_attach,	amr_cam_attach),
99 	DEVMETHOD(device_detach,	amr_cam_detach),
100 	{ 0, 0 }
101 };
102 
103 static driver_t	amr_pass_driver = {
104 	"amrp",
105 	amr_pass_methods,
106 	0
107 };
108 
109 DRIVER_MODULE(amrp, amr, amr_pass_driver, amr_pass_devclass, 0, 0);
110 MODULE_DEPEND(amrp, cam, 1, 1, 1);
111 
112 static MALLOC_DEFINE(M_AMRCAM, "amrcam", "AMR CAM memory");
113 
114 /***********************************************************************
115  * Enqueue/dequeue functions
116  */
117 static __inline void
amr_enqueue_ccb(struct amr_softc * sc,union ccb * ccb)118 amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb)
119 {
120 
121 	TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
122 }
123 
124 static __inline void
amr_requeue_ccb(struct amr_softc * sc,union ccb * ccb)125 amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb)
126 {
127 
128 	TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
129 }
130 
131 static __inline union ccb *
amr_dequeue_ccb(struct amr_softc * sc)132 amr_dequeue_ccb(struct amr_softc *sc)
133 {
134 	union ccb	*ccb;
135 
136 	if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL)
137 		TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
138 	return(ccb);
139 }
140 
141 static int
amr_cam_probe(device_t dev)142 amr_cam_probe(device_t dev)
143 {
144 	return (0);
145 }
146 
147 /********************************************************************************
148  * Attach our 'real' SCSI channels to CAM
149  */
150 static int
amr_cam_attach(device_t dev)151 amr_cam_attach(device_t dev)
152 {
153 	struct amr_softc *sc;
154 	struct cam_devq	*devq;
155 	int chn, error;
156 
157 	sc = device_get_softc(dev);
158 
159 	/* initialise the ccb queue */
160 	TAILQ_INIT(&sc->amr_cam_ccbq);
161 
162 	/*
163 	 * Allocate a devq for all our channels combined.  This should
164 	 * allow for the maximum number of SCSI commands we will accept
165 	 * at one time. Save the pointer in the softc so we can find it later
166 	 * during detach.
167 	 */
168 	if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL)
169 		return(ENOMEM);
170 	sc->amr_cam_devq = devq;
171 
172 	/*
173 	 * Iterate over our channels, registering them with CAM
174 	 */
175 	for (chn = 0; chn < sc->amr_maxchan; chn++) {
176 
177 		/* allocate a sim */
178 		if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action,
179 		    amr_cam_poll, "amr", sc, device_get_unit(sc->amr_dev),
180 		    &sc->amr_list_lock, 1, AMR_MAX_SCSI_CMDS, devq)) == NULL) {
181 			cam_simq_free(devq);
182 			device_printf(sc->amr_dev, "CAM SIM attach failed\n");
183 			return(ENOMEM);
184 		}
185 
186 		/* register the bus ID so we can get it later */
187 		mtx_lock(&sc->amr_list_lock);
188 		error = xpt_bus_register(sc->amr_cam_sim[chn], sc->amr_dev,chn);
189 		mtx_unlock(&sc->amr_list_lock);
190 		if (error) {
191 			device_printf(sc->amr_dev,
192 			    "CAM XPT bus registration failed\n");
193 			return(ENXIO);
194 		}
195 	}
196 	/*
197 	 * XXX we should scan the config and work out which devices are
198 	 * actually protected.
199 	 */
200 	sc->amr_cam_command = amr_cam_command;
201 	return(0);
202 }
203 
204 /********************************************************************************
205  * Disconnect ourselves from CAM
206  */
207 static int
amr_cam_detach(device_t dev)208 amr_cam_detach(device_t dev)
209 {
210 	struct amr_softc *sc;
211 	int		chn;
212 
213 	sc = device_get_softc(dev);
214 	mtx_lock(&sc->amr_list_lock);
215 	for (chn = 0; chn < sc->amr_maxchan; chn++) {
216 		/*
217 		 * If a sim was allocated for this channel, free it
218 		 */
219 		if (sc->amr_cam_sim[chn] != NULL) {
220 			xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn]));
221 			cam_sim_free(sc->amr_cam_sim[chn], FALSE);
222 		}
223 	}
224 	mtx_unlock(&sc->amr_list_lock);
225 
226 	/* Now free the devq */
227 	if (sc->amr_cam_devq != NULL)
228 		cam_simq_free(sc->amr_cam_devq);
229 
230 	return (0);
231 }
232 
233 /***********************************************************************
234  ***********************************************************************
235 			CAM passthrough interface
236  ***********************************************************************
237  ***********************************************************************/
238 
239 /***********************************************************************
240  * Handle a request for action from CAM
241  */
242 static void
amr_cam_action(struct cam_sim * sim,union ccb * ccb)243 amr_cam_action(struct cam_sim *sim, union ccb *ccb)
244 {
245 	struct amr_softc	*sc = cam_sim_softc(sim);
246 
247 	switch(ccb->ccb_h.func_code) {
248 
249 	/*
250 	 * Perform SCSI I/O to a physical device.
251 	 */
252 	case XPT_SCSI_IO:
253 	{
254 		struct ccb_hdr		*ccbh = &ccb->ccb_h;
255 		struct ccb_scsiio	*csio = &ccb->csio;
256 
257 		/* Validate the CCB */
258 		ccbh->status = CAM_REQ_INPROG;
259 
260 		/* check the CDB length */
261 		if (csio->cdb_len > AMR_MAX_EXTCDB_LEN)
262 			ccbh->status = CAM_REQ_INVALID;
263 
264 		if ((csio->cdb_len > AMR_MAX_CDB_LEN) &&
265 		    (sc->support_ext_cdb == 0))
266 			ccbh->status = CAM_REQ_INVALID;
267 
268 		/* check that the CDB pointer is not to a physical address */
269 		if ((ccbh->flags & CAM_CDB_POINTER) &&
270 		    (ccbh->flags & CAM_CDB_PHYS))
271 			ccbh->status = CAM_REQ_INVALID;
272 		/*
273 		 * if there is data transfer, it must be to/from a virtual
274 		 * address
275 		 */
276 		if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
277 			if ((ccbh->flags & CAM_DATA_MASK) != CAM_DATA_VADDR)
278 				/* we can't map it */
279 				ccbh->status = CAM_REQ_INVALID;
280 		}
281 
282 		/*
283 		 * If the command is to a LUN other than 0, fail it.
284 		 * This is probably incorrect, but during testing the
285 		 * firmware did not seem to respect the LUN field, and thus
286 		 * devices appear echoed.
287 		 */
288 		if (csio->ccb_h.target_lun != 0)
289 			ccbh->status = CAM_DEV_NOT_THERE;
290 
291 		/* if we're happy with the request, queue it for attention */
292 		if (ccbh->status == CAM_REQ_INPROG) {
293 
294 			/* save the channel number in the ccb */
295 			csio->ccb_h.sim_priv.entries[0].field= cam_sim_bus(sim);
296 
297 			amr_enqueue_ccb(sc, ccb);
298 			amr_startio(sc);
299 			return;
300 		}
301 		break;
302 	}
303 
304 	case XPT_CALC_GEOMETRY:
305 	{
306 		cam_calc_geometry(&ccb->ccg, /*extended*/1);
307 		break;
308 	}
309 
310 	/*
311 	 * Return path stats.  Some of these should probably be amended.
312 	 */
313 	case XPT_PATH_INQ:
314 	{
315 		struct ccb_pathinq	  *cpi = & ccb->cpi;
316 
317 		debug(3, "XPT_PATH_INQ");
318 		cpi->version_num = 1;		   /* XXX??? */
319 		cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
320 		cpi->target_sprt = 0;
321 		cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
322 		cpi->hba_eng_cnt = 0;
323 		cpi->max_target = AMR_MAX_TARGETS;
324 		cpi->max_lun = 0 /* AMR_MAX_LUNS*/;
325 		cpi->initiator_id = 7;		  /* XXX variable? */
326 		strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
327 		strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
328 		strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
329 		cpi->unit_number = cam_sim_unit(sim);
330 		cpi->bus_id = cam_sim_bus(sim);
331 		cpi->base_transfer_speed = 132 * 1024;  /* XXX */
332 		cpi->transport = XPORT_SPI;
333 		cpi->transport_version = 2;
334 		cpi->protocol = PROTO_SCSI;
335 		cpi->protocol_version = SCSI_REV_2;
336 		cpi->ccb_h.status = CAM_REQ_CMP;
337 
338 		break;
339 	}
340 
341 	case XPT_RESET_BUS:
342 	{
343 		struct ccb_pathinq	*cpi = & ccb->cpi;
344 
345 		debug(1, "XPT_RESET_BUS");
346 		cpi->ccb_h.status = CAM_REQ_CMP;
347 		break;
348 	}
349 
350 	case XPT_RESET_DEV:
351 	{
352 		debug(1, "XPT_RESET_DEV");
353 		ccb->ccb_h.status = CAM_REQ_CMP;
354 		break;
355 	}
356 
357 	case XPT_GET_TRAN_SETTINGS:
358 	{
359 		struct ccb_trans_settings	*cts = &(ccb->cts);
360 
361 		debug(3, "XPT_GET_TRAN_SETTINGS");
362 
363 		struct ccb_trans_settings_scsi *scsi;
364 		struct ccb_trans_settings_spi *spi;
365 
366 		scsi = &cts->proto_specific.scsi;
367 		spi = &cts->xport_specific.spi;
368 
369 		cts->protocol = PROTO_SCSI;
370 		cts->protocol_version = SCSI_REV_2;
371 		cts->transport = XPORT_SPI;
372 		cts->transport_version = 2;
373 
374 		if (cts->type == CTS_TYPE_USER_SETTINGS) {
375 			ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
376 			break;
377 		}
378 
379 		spi->flags = CTS_SPI_FLAGS_DISC_ENB;
380 		spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
381 		spi->sync_period = 6;   /* 40MHz how wide is this bus? */
382 		spi->sync_offset = 31;  /* How to extract this from board? */
383 
384 		spi->valid = CTS_SPI_VALID_SYNC_RATE
385 			| CTS_SPI_VALID_SYNC_OFFSET
386 			| CTS_SPI_VALID_BUS_WIDTH
387 			| CTS_SPI_VALID_DISC;
388 		scsi->valid = CTS_SCSI_VALID_TQ;
389 		ccb->ccb_h.status = CAM_REQ_CMP;
390 		break;
391 	}
392 
393 	case XPT_SET_TRAN_SETTINGS:
394 		debug(3, "XPT_SET_TRAN_SETTINGS");
395 		ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
396 		break;
397 
398 
399 	/*
400 	 * Reject anything else as unsupported.
401 	 */
402 	default:
403 		/* we can't do this */
404 		ccb->ccb_h.status = CAM_REQ_INVALID;
405 		break;
406 	}
407 
408 	mtx_assert(&sc->amr_list_lock, MA_OWNED);
409 	xpt_done(ccb);
410 }
411 
412 /***********************************************************************
413  * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI
414  * command.
415  */
416 static int
amr_cam_command(struct amr_softc * sc,struct amr_command ** acp)417 amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
418 {
419 	struct amr_command		*ac;
420 	struct amr_passthrough		*ap;
421 	struct amr_ext_passthrough	*aep;
422 	struct ccb_scsiio		*csio;
423 	int				bus, target, error;
424 
425 	error = 0;
426 	ac = NULL;
427 	ap = NULL;
428 	aep = NULL;
429 
430 	/* check to see if there is a ccb for us to work with */
431 	if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
432 	goto out;
433 
434 	/* get bus/target, XXX validate against protected devices? */
435 	bus = csio->ccb_h.sim_priv.entries[0].field;
436 	target = csio->ccb_h.target_id;
437 
438 	/*
439 	 * Build a passthrough command.
440 	 */
441 
442 	/* construct command */
443 	if ((ac = amr_alloccmd(sc)) == NULL) {
444 		error = ENOMEM;
445 		goto out;
446 	}
447 
448 	/* construct passthrough */
449 	if (sc->support_ext_cdb ) {
450 		aep = &ac->ac_ccb->ccb_epthru;
451 		aep->ap_timeout = 2;
452 		aep->ap_ars = 1;
453 		aep->ap_request_sense_length = 14;
454 		aep->ap_islogical = 0;
455 		aep->ap_channel = bus;
456 		aep->ap_scsi_id = target;
457 		aep->ap_logical_drive_no = csio->ccb_h.target_lun;
458 		aep->ap_cdb_length = csio->cdb_len;
459 		aep->ap_data_transfer_length = csio->dxfer_len;
460 		if (csio->ccb_h.flags & CAM_CDB_POINTER) {
461 			bcopy(csio->cdb_io.cdb_ptr, aep->ap_cdb, csio->cdb_len);
462 		} else {
463 			bcopy(csio->cdb_io.cdb_bytes, aep->ap_cdb,
464 			    csio->cdb_len);
465 		}
466 		/*
467 		 * we leave the data s/g list and s/g count to the map routine
468 		 * later
469 		 */
470 
471 		debug(2, " COMMAND %x/%d+%d to %d:%d:%d", aep->ap_cdb[0],
472 		    aep->ap_cdb_length, csio->dxfer_len, aep->ap_channel,
473 		    aep->ap_scsi_id, aep->ap_logical_drive_no);
474 
475 	} else {
476 		ap = &ac->ac_ccb->ccb_pthru;
477 		ap->ap_timeout = 0;
478 		ap->ap_ars = 1;
479 		ap->ap_request_sense_length = 14;
480 		ap->ap_islogical = 0;
481 		ap->ap_channel = bus;
482 		ap->ap_scsi_id = target;
483 		ap->ap_logical_drive_no = csio->ccb_h.target_lun;
484 		ap->ap_cdb_length = csio->cdb_len;
485 		ap->ap_data_transfer_length = csio->dxfer_len;
486 		if (csio->ccb_h.flags & CAM_CDB_POINTER) {
487 			bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
488 		} else {
489 			bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb,
490 			    csio->cdb_len);
491 		}
492 		/*
493 		 * we leave the data s/g list and s/g count to the map routine
494 		 * later
495 		 */
496 
497 		debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0],
498 		    ap->ap_cdb_length, csio->dxfer_len, ap->ap_channel,
499 		    ap->ap_scsi_id, ap->ap_logical_drive_no);
500 	}
501 
502 	ac->ac_flags |= AMR_CMD_CCB;
503 
504 	ac->ac_data = csio->data_ptr;
505 	ac->ac_length = csio->dxfer_len;
506 	if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
507 		ac->ac_flags |= AMR_CMD_DATAIN;
508 	if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
509 		ac->ac_flags |= AMR_CMD_DATAOUT;
510 
511 	ac->ac_private = csio;
512 	ac->ac_complete = amr_cam_complete;
513 	if ( sc->support_ext_cdb ) {
514 		ac->ac_mailbox.mb_command = AMR_CMD_EXTPASS;
515 	} else {
516 		ac->ac_mailbox.mb_command = AMR_CMD_PASS;
517 	}
518 
519 out:
520 	if (error != 0) {
521 		if (ac != NULL)
522 			amr_releasecmd(ac);
523 		if (csio != NULL)
524 			/* put it back and try again later */
525 			amr_requeue_ccb(sc, (union ccb *)csio);
526 	}
527 	*acp = ac;
528 	return(error);
529 }
530 
531 /***********************************************************************
532  * Check for interrupt status
533  */
534 static void
amr_cam_poll(struct cam_sim * sim)535 amr_cam_poll(struct cam_sim *sim)
536 {
537 
538 	amr_done(cam_sim_softc(sim));
539 }
540 
541  /**********************************************************************
542  * Handle completion of a command submitted via CAM.
543  */
544 static void
amr_cam_complete(struct amr_command * ac)545 amr_cam_complete(struct amr_command *ac)
546 {
547 	struct amr_passthrough		*ap;
548 	struct amr_ext_passthrough	*aep;
549 	struct ccb_scsiio		*csio;
550 	struct scsi_inquiry_data	*inq;
551 	int				scsi_status, cdb0;
552 
553 	ap = &ac->ac_ccb->ccb_pthru;
554 	aep = &ac->ac_ccb->ccb_epthru;
555 	csio = (struct ccb_scsiio *)ac->ac_private;
556 	inq = (struct scsi_inquiry_data *)csio->data_ptr;
557 
558 	if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
559 		scsi_status = aep->ap_scsi_status;
560 	else
561 		scsi_status = ap->ap_scsi_status;
562 	debug(1, "status 0x%x  AP scsi_status 0x%x", ac->ac_status,
563 	    scsi_status);
564 
565 	/* Make sure the status is sane */
566 	if ((ac->ac_status != AMR_STATUS_SUCCESS) && (scsi_status == 0)) {
567 		csio->ccb_h.status = CAM_REQ_CMP_ERR;
568 		goto out;
569 	}
570 
571 	/*
572 	 * Hide disks from CAM so that they're not picked up and treated as
573 	 * 'normal' disks.
574 	 *
575 	 * If the configuration provides a mechanism to mark a disk a "not
576 	 * managed", we could add handling for that to allow disks to be
577 	 * selectively visible.
578 	 */
579 
580 	/* handle passthrough SCSI status */
581 	switch(scsi_status) {
582 	case 0:	/* completed OK */
583 		if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
584 			cdb0 = aep->ap_cdb[0];
585 		else
586 			cdb0 = ap->ap_cdb[0];
587 		if ((cdb0 == INQUIRY) && (SID_TYPE(inq) == T_DIRECT))
588 			inq->device = (inq->device & 0xe0) | T_NODEVICE;
589 		csio->ccb_h.status = CAM_REQ_CMP;
590 		break;
591 
592 	case 0x02:
593 		csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
594 		csio->scsi_status = SCSI_STATUS_CHECK_COND;
595 		if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
596 			bcopy(aep->ap_request_sense_area, &csio->sense_data,
597 			    AMR_MAX_REQ_SENSE_LEN);
598 		else
599 			bcopy(ap->ap_request_sense_area, &csio->sense_data,
600 			    AMR_MAX_REQ_SENSE_LEN);
601 		csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
602 		csio->ccb_h.status |= CAM_AUTOSNS_VALID;
603 		break;
604 
605 	case 0x08:
606 		csio->ccb_h.status = CAM_SCSI_BUSY;
607 		break;
608 
609 	case 0xf0:
610 	case 0xf4:
611 	default:
612 		/*
613 		 * Non-zero LUNs are already filtered, so there's no need
614 		 * to return CAM_DEV_NOT_THERE.
615 		 */
616 		csio->ccb_h.status = CAM_SEL_TIMEOUT;
617 		break;
618 	}
619 
620 out:
621 	if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
622 		debug(2, "%*D\n", imin(csio->dxfer_len, 16), csio->data_ptr,
623 		    " ");
624 
625 	mtx_lock(&ac->ac_sc->amr_list_lock);
626 	xpt_done((union ccb *)csio);
627 	amr_releasecmd(ac);
628 	mtx_unlock(&ac->ac_sc->amr_list_lock);
629 }
630