xref: /freebsd/sys/dev/aac/aac_cam.c (revision 60794e0478b835c275eccb116cd177a789f87f56) 
1 /*
2  * Copyright (c) 2002 Adaptec, Inc.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  *	$FreeBSD$
27  */
28 
29 /*
30  * CAM front-end for communicating with non-DASD devices
31  */
32 
33 #include "opt_aac.h"
34 
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/sysctl.h>
39 #include <sys/malloc.h>
40 
41 #include <cam/cam.h>
42 #include <cam/cam_ccb.h>
43 #include <cam/cam_debug.h>
44 #include <cam/cam_sim.h>
45 #include <cam/cam_xpt_sim.h>
46 #include <cam/scsi/scsi_all.h>
47 #include <cam/scsi/scsi_message.h>
48 
49 #include <sys/bus.h>
50 #include <sys/conf.h>
51 #include <sys/disk.h>
52 
53 #include <machine/md_var.h>
54 #include <machine/bus.h>
55 #include <sys/rman.h>
56 
57 #include <vm/vm.h>
58 #include <vm/pmap.h>
59 
60 #include <dev/aac/aacreg.h>
61 #include <dev/aac/aac_ioctl.h>
62 #include <dev/aac/aacvar.h>
63 
64 struct aac_cam {
65 	device_t		dev;
66 	struct aac_sim		*inf;
67 	struct cam_sim		*sim;
68 	struct cam_path		*path;
69 };
70 
71 static int aac_cam_probe(device_t dev);
72 static int aac_cam_attach(device_t dev);
73 static int aac_cam_detach(device_t dev);
74 static void aac_cam_action(struct cam_sim *, union ccb *);
75 static void aac_cam_poll(struct cam_sim *);
76 static void aac_cam_complete(struct aac_command *);
77 static u_int32_t aac_cam_reset_bus(struct cam_sim *, union ccb *);
78 static u_int32_t aac_cam_abort_ccb(struct cam_sim *, union ccb *);
79 static u_int32_t aac_cam_term_io(struct cam_sim *, union ccb *);
80 static int aac_cam_get_tran_settings(struct aac_softc *, struct ccb_trans_settings *, u_int32_t);
81 
82 static devclass_t	aac_pass_devclass;
83 
84 static device_method_t	aac_pass_methods[] = {
85 	DEVMETHOD(device_probe,		aac_cam_probe),
86 	DEVMETHOD(device_attach,	aac_cam_attach),
87 	DEVMETHOD(device_detach,	aac_cam_detach),
88 	{ 0, 0 }
89 };
90 
91 static driver_t	aac_pass_driver = {
92 	"aacp",
93 	aac_pass_methods,
94 	sizeof(struct aac_cam)
95 };
96 
97 DRIVER_MODULE(aacp, aac, aac_pass_driver, aac_pass_devclass, 0, 0);
98 MODULE_DEPEND(aacp, cam, 1, 1, 1);
99 
100 MALLOC_DEFINE(M_AACCAM, "aaccam", "AAC CAM info");
101 
102 static int
103 aac_cam_probe(device_t dev)
104 {
105 	debug_called(2);
106 
107 	return (0);
108 }
109 
110 static int
111 aac_cam_detach(device_t dev)
112 {
113 	struct aac_cam *camsc;
114 	debug_called(2);
115 
116 	camsc = (struct aac_cam *)device_get_softc(dev);
117 
118 	xpt_async(AC_LOST_DEVICE, camsc->path, NULL);
119 	xpt_free_path(camsc->path);
120 	xpt_bus_deregister(cam_sim_path(camsc->sim));
121 	cam_sim_free(camsc->sim, /*free_devq*/TRUE);
122 
123 	return (0);
124 }
125 
126 /*
127  * Register the driver as a CAM SIM
128  */
129 static int
130 aac_cam_attach(device_t dev)
131 {
132 	struct cam_devq *devq;
133 	struct cam_sim *sim;
134 	struct cam_path *path;
135 	struct aac_cam *camsc;
136 	struct aac_sim *inf;
137 
138 	debug_called(1);
139 
140 	camsc = (struct aac_cam *)device_get_softc(dev);
141 	inf = (struct aac_sim *)device_get_ivars(dev);
142 	camsc->inf = inf;
143 
144 	devq = cam_simq_alloc(inf->TargetsPerBus);
145 	if (devq == NULL)
146 		return (EIO);
147 
148 	sim = cam_sim_alloc(aac_cam_action, aac_cam_poll, "aacp", camsc,
149 	    device_get_unit(dev), 1, 1, devq);
150 	if (sim == NULL) {
151 		cam_simq_free(devq);
152 		return (EIO);
153 	}
154 
155 	/* Since every bus has it's own sim, every bus 'appears' as bus 0 */
156 	if (xpt_bus_register(sim, 0) != CAM_SUCCESS) {
157 		cam_sim_free(sim, TRUE);
158 		return (EIO);
159 	}
160 
161 	if (xpt_create_path(&path, NULL, cam_sim_path(sim),
162 	    CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
163 		xpt_bus_deregister(cam_sim_path(sim));
164 		cam_sim_free(sim, TRUE);
165 		return (EIO);
166 	}
167 
168 	camsc->sim = sim;
169 	camsc->path = path;
170 
171 	return (0);
172 }
173 
174 static void
175 aac_cam_action(struct cam_sim *sim, union ccb *ccb)
176 {
177 	struct	aac_cam *camsc;
178 	struct	aac_softc *sc;
179 	struct	aac_srb32 *srb;
180 	struct	aac_fib *fib;
181 	struct	aac_command *cm;
182 
183 	debug_called(2);
184 
185 	camsc = (struct aac_cam *)cam_sim_softc(sim);
186 	sc = camsc->inf->aac_sc;
187 
188 	/* Synchronous ops, and ops that don't require communication with the
189 	 * controller */
190 	switch(ccb->ccb_h.func_code) {
191 	case XPT_SCSI_IO:
192 	case XPT_RESET_DEV:
193 		/* These are handled down below */
194 		break;
195 	case XPT_CALC_GEOMETRY:
196 	{
197 		struct ccb_calc_geometry *ccg;
198 		u_int32_t size_mb;
199 		u_int32_t secs_per_cylinder;
200 
201 		ccg = &ccb->ccg;
202 		size_mb = ccg->volume_size /
203 		    ((1024L * 1024L) / ccg->block_size);
204 		if (size_mb >= (2 * 1024)) {		/* 2GB */
205 			ccg->heads = 255;
206 			ccg->secs_per_track = 63;
207 		} else if (size_mb >= (1 * 1024)) {	/* 1GB */
208 			ccg->heads = 128;
209 			ccg->secs_per_track = 32;
210 		} else {
211 			ccg->heads = 64;
212 			ccg->secs_per_track = 32;
213 		}
214 		secs_per_cylinder = ccg->heads * ccg->secs_per_track;
215 		ccg->cylinders = ccg->volume_size / secs_per_cylinder;
216 
217 		ccb->ccb_h.status = CAM_REQ_CMP;
218 		xpt_done(ccb);
219 		return;
220 	}
221 	case XPT_PATH_INQ:
222 	{
223 		struct ccb_pathinq *cpi = &ccb->cpi;
224 
225 		cpi->version_num = 1;
226 		cpi->hba_inquiry = PI_WIDE_16;
227 		cpi->target_sprt = 0;
228 
229 		/* Resetting via the passthrough causes problems. */
230 		cpi->hba_misc = PIM_NOBUSRESET;
231 		cpi->hba_eng_cnt = 0;
232 		cpi->max_target = camsc->inf->TargetsPerBus;
233 		cpi->max_lun = 8;	/* Per the controller spec */
234 		cpi->initiator_id = camsc->inf->InitiatorBusId;
235 		cpi->bus_id = camsc->inf->BusNumber;
236 		cpi->base_transfer_speed = 3300;
237 		strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
238 		strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
239 		strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
240 		cpi->unit_number = cam_sim_unit(sim);
241 
242 		ccb->ccb_h.status = CAM_REQ_CMP;
243 		xpt_done(ccb);
244 		return;
245 	}
246 	case XPT_GET_TRAN_SETTINGS:
247 	{
248 		u_int32_t handle;
249 
250 		handle = AAC_BTL_TO_HANDLE(camsc->inf->BusNumber,
251 		    ccb->ccb_h.target_id, ccb->ccb_h.target_lun);
252 		ccb->ccb_h.status = aac_cam_get_tran_settings(sc, &ccb->cts,
253 		    handle);
254 		xpt_done(ccb);
255 		return;
256 	}
257 	case XPT_SET_TRAN_SETTINGS:
258 		ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
259 		xpt_done(ccb);
260 		return;
261 	case XPT_RESET_BUS:
262 		if (!(sc->quirks & AAC_QUIRK_CAM_NORESET)) {
263 			ccb->ccb_h.status = aac_cam_reset_bus(sim, ccb);
264 		} else {
265 			ccb->ccb_h.status = CAM_REQ_CMP;
266 		}
267 		xpt_done(ccb);
268 		return;
269 	case XPT_ABORT:
270 		ccb->ccb_h.status = aac_cam_abort_ccb(sim, ccb);
271 		xpt_done(ccb);
272 		return;
273 	case XPT_TERM_IO:
274 		ccb->ccb_h.status = aac_cam_term_io(sim, ccb);
275 		xpt_done(ccb);
276 		return;
277 	default:
278 		device_printf(sc->aac_dev, "Unsupported command 0x%x\n",
279 		    ccb->ccb_h.func_code);
280 		ccb->ccb_h.status = CAM_PROVIDE_FAIL;
281 		xpt_done(ccb);
282 		return;
283 	}
284 
285 	/* Async ops that require communcation with the controller */
286 
287 	AAC_LOCK_ACQUIRE(&sc->aac_io_lock);
288 	if (aac_alloc_command(sc, &cm)) {
289 		AAC_LOCK_RELEASE(&sc->aac_io_lock);
290 		xpt_freeze_simq(sim, 1);
291 		ccb->ccb_h.status = CAM_REQUEUE_REQ;
292 		xpt_done(ccb);
293 		return;
294 	}
295 
296 	fib = cm->cm_fib;
297 	srb = (struct aac_srb32 *)&fib->data[0];
298 	cm->cm_datalen = 0;
299 
300 	switch (ccb->ccb_h.flags & CAM_DIR_MASK) {
301 	case CAM_DIR_IN:
302 		srb->flags = AAC_SRB_FLAGS_DATA_IN;
303 		cm->cm_flags |= AAC_CMD_DATAIN;
304 		break;
305 	case CAM_DIR_OUT:
306 		srb->flags = AAC_SRB_FLAGS_DATA_OUT;
307 		cm->cm_flags |= AAC_CMD_DATAOUT;
308 		break;
309 	case CAM_DIR_NONE:
310 		srb->flags = AAC_SRB_FLAGS_NO_DATA_XFER;
311 		break;
312 	default:
313 		srb->flags = AAC_SRB_FLAGS_UNSPECIFIED_DIRECTION;
314 		cm->cm_flags |= AAC_CMD_DATAIN | AAC_CMD_DATAOUT;
315 		break;
316 	}
317 
318 	switch(ccb->ccb_h.func_code) {
319 	case XPT_SCSI_IO:
320 	{
321 		struct ccb_scsiio *csio = &ccb->csio;
322 
323 		srb->function = AAC_SRB_FUNC_EXECUTE_SCSI;
324 
325 		/*
326 		 * Copy the CDB into the SRB.  It's only 6-16 bytes,
327 		 * so a copy is not too expensive.
328 		 */
329 		srb->cdb_len = csio->cdb_len;
330 		if (ccb->ccb_h.flags & CAM_CDB_POINTER)
331 			bcopy(csio->cdb_io.cdb_ptr, (u_int8_t *)&srb->cdb[0],
332 			    srb->cdb_len);
333 		else
334 			bcopy(csio->cdb_io.cdb_bytes, (u_int8_t *)&srb->cdb[0],
335 			    srb->cdb_len);
336 
337 		/* Map the s/g list. XXX 32bit addresses only! */
338 		if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
339 			if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) {
340 				srb->data_len = csio->dxfer_len;
341 				if (ccb->ccb_h.flags & CAM_DATA_PHYS) {
342 					srb->sg_map32.SgCount = 1;
343 					srb->sg_map32.SgEntry[0].SgAddress =
344 					    (u_int32_t)csio->data_ptr;
345 					srb->sg_map32.SgEntry[0].SgByteCount =
346 					    csio->dxfer_len;
347 				} else {
348 					/*
349 					 * Arrange things so that the S/G
350 					 * map will get set up automagically
351 					 */
352 					cm->cm_data = (void *)csio->data_ptr;
353 					cm->cm_datalen = csio->dxfer_len;
354 					cm->cm_sgtable = &srb->sg_map32;
355 				}
356 			} else {
357 				/* XXX Need to handle multiple s/g elements */
358 				panic("aac_cam: multiple s/g elements");
359 			}
360 		} else {
361 			srb->sg_map32.SgCount = 0;
362 			srb->sg_map32.SgEntry[0].SgByteCount = 0;
363 			srb->data_len = 0;
364 		}
365 
366 		break;
367 	}
368 	case XPT_RESET_DEV:
369 		if (!(sc->quirks & AAC_QUIRK_CAM_NORESET)) {
370 			srb->function = AAC_SRB_FUNC_RESET_DEVICE;
371 			break;
372 		} else {
373 			ccb->ccb_h.status = CAM_REQ_CMP;
374 			xpt_done(ccb);
375 			return;
376 		}
377 	default:
378 		break;
379 	}
380 
381 	srb->bus = camsc->inf->BusNumber; /* Bus number relative to the card */
382 	srb->target = ccb->ccb_h.target_id;
383 	srb->lun = ccb->ccb_h.target_lun;
384 	srb->timeout = ccb->ccb_h.timeout;	/* XXX */
385 	srb->retry_limit = 0;
386 
387 	cm->cm_complete = aac_cam_complete;
388 	cm->cm_private = ccb;
389 	cm->cm_timestamp = time_second;
390 	cm->cm_queue = AAC_ADAP_NORM_CMD_QUEUE;
391 
392 	fib->Header.XferState =
393 	    AAC_FIBSTATE_HOSTOWNED	|
394 	    AAC_FIBSTATE_INITIALISED	|
395 	    AAC_FIBSTATE_FROMHOST	|
396 	    AAC_FIBSTATE_REXPECTED	|
397 	    AAC_FIBSTATE_NORM;
398 	fib->Header.Command = ScsiPortCommand;
399 	fib->Header.Size = sizeof(struct aac_fib_header) +
400 	    sizeof(struct aac_srb32);
401 
402 	aac_enqueue_ready(cm);
403 	aac_startio(cm->cm_sc);
404 
405 	AAC_LOCK_RELEASE(&sc->aac_io_lock);
406 
407 	return;
408 }
409 
410 static void
411 aac_cam_poll(struct cam_sim *sim)
412 {
413 	/*
414 	 * Pinging the interrupt routine isn't very safe, nor is it
415 	 * really necessary.  Do nothing.
416 	 */
417 }
418 
419 static void
420 aac_cam_complete(struct aac_command *cm)
421 {
422 	union	ccb *ccb;
423 	struct 	aac_srb_response *srbr;
424 	struct	aac_softc *sc;
425 
426 	debug_called(2);
427 
428 	sc = cm->cm_sc;
429 	ccb = cm->cm_private;
430 	srbr = (struct aac_srb_response *)&cm->cm_fib->data[0];
431 
432 	if (srbr->fib_status != 0) {
433 		device_printf(sc->aac_dev, "Passthru FIB failed!\n");
434 		ccb->ccb_h.status = CAM_REQ_ABORTED;
435 	} else {
436 		/*
437 		 * The SRB error codes just happen to match the CAM error
438 		 * codes.  How convienient!
439 		 */
440 		ccb->ccb_h.status = srbr->srb_status;
441 
442 		/* Take care of SCSI_IO ops. */
443 		if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
444 			u_int8_t command, device;
445 
446 			ccb->csio.scsi_status = srbr->scsi_status;
447 
448 			/* Take care of autosense */
449 			if (srbr->sense_len) {
450 				int sense_len, scsi_sense_len;
451 
452 				scsi_sense_len = sizeof(struct scsi_sense_data);
453 				bzero(&ccb->csio.sense_data, scsi_sense_len);
454 				sense_len = (srbr->sense_len >
455 				    scsi_sense_len) ? scsi_sense_len :
456 				    srbr->sense_len;
457 				bcopy(&srbr->sense[0], &ccb->csio.sense_data,
458 				    srbr->sense_len);
459 				ccb->csio.sense_len = sense_len;
460 				ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
461 				scsi_sense_print(&ccb->csio);
462 			}
463 
464 			/* If this is an inquiry command, fake things out */
465 			if (ccb->ccb_h.flags & CAM_CDB_POINTER)
466 				command = ccb->csio.cdb_io.cdb_ptr[0];
467 			else
468 				command = ccb->csio.cdb_io.cdb_bytes[0];
469 
470 			if ((command == INQUIRY) &&
471 			    (ccb->ccb_h.status == CAM_REQ_CMP)) {
472 				device = ccb->csio.data_ptr[0] & 0x1f;
473 				/*
474 				 * We want DASD and PROC devices to only be
475 				 * visible through the pass device.
476 				 */
477 				if ((device == T_DIRECT) ||
478 				    (device == T_PROCESSOR) ||
479 				    (sc->quirks & AAC_QUIRK_CAM_PASSONLY))
480 					ccb->csio.data_ptr[0] =
481 					    ((device & 0xe0) | T_NODEVICE);
482 			}
483 		}
484 	}
485 
486 	aac_release_command(cm);
487 
488 	xpt_done(ccb);
489 
490 	return;
491 }
492 
493 static u_int32_t
494 aac_cam_reset_bus(struct cam_sim *sim, union ccb *ccb)
495 {
496 	struct aac_fib *fib;
497 	struct aac_softc *sc;
498 	struct aac_cam *camsc;
499 	struct aac_vmioctl *vmi;
500 	struct aac_resetbus *rbc;
501 	int e;
502 
503 	camsc = (struct aac_cam *)cam_sim_softc(sim);
504 	sc = camsc->inf->aac_sc;
505 
506 	if (sc == NULL) {
507 		printf("Null sc?\n");
508 		return (CAM_REQ_ABORTED);
509 	}
510 
511 	aac_alloc_sync_fib(sc, &fib, 0);
512 
513 	vmi = (struct aac_vmioctl *)&fib->data[0];
514 	bzero(vmi, sizeof(struct aac_vmioctl));
515 
516 	vmi->Command = VM_Ioctl;
517 	vmi->ObjType = FT_DRIVE;
518 	vmi->MethId = sc->scsi_method_id;
519 	vmi->ObjId = 0;
520 	vmi->IoctlCmd = ResetBus;
521 
522 	rbc = (struct aac_resetbus *)&vmi->IoctlBuf[0];
523 	rbc->BusNumber = camsc->inf->BusNumber;
524 
525 	e = aac_sync_fib(sc, ContainerCommand, 0, fib,
526 	    sizeof(struct aac_vmioctl));
527 	if (e) {
528 		device_printf(sc->aac_dev,"Error %d sending ResetBus command\n",
529 		    e);
530 		aac_release_sync_fib(sc);
531 		return (CAM_REQ_ABORTED);
532 	}
533 
534 	aac_release_sync_fib(sc);
535 	return (CAM_REQ_CMP);
536 }
537 
538 static u_int32_t
539 aac_cam_abort_ccb(struct cam_sim *sim, union ccb *ccb)
540 {
541 	return (CAM_UA_ABORT);
542 }
543 
544 static u_int32_t
545 aac_cam_term_io(struct cam_sim *sim, union ccb *ccb)
546 {
547 	return (CAM_UA_TERMIO);
548 }
549 
550 static int
551 aac_cam_get_tran_settings(struct aac_softc *sc, struct ccb_trans_settings *cts, u_int32_t handle)
552 {
553 	struct aac_fib *fib;
554 	struct aac_vmioctl *vmi;
555 	struct aac_vmi_devinfo_resp *vmi_resp;
556 	int error;
557 
558 	aac_alloc_sync_fib(sc, &fib, 0);
559 	vmi = (struct aac_vmioctl *)&fib->data[0];
560 	bzero(vmi, sizeof(struct aac_vmioctl));
561 
562 	vmi->Command = VM_Ioctl;
563 	vmi->ObjType = FT_DRIVE;
564 	vmi->MethId = sc->scsi_method_id;
565 	vmi->ObjId = handle;
566 	vmi->IoctlCmd = GetDeviceProbeInfo;
567 
568 	error = aac_sync_fib(sc, ContainerCommand, 0, fib,
569 	    sizeof(struct aac_vmioctl));
570 	if (error) {
571 		device_printf(sc->aac_dev, "Error %d sending GetDeviceProbeInfo"
572 		              " command\n", error);
573 		aac_release_sync_fib(sc);
574 		return (CAM_REQ_INVALID);
575 	}
576 
577 	vmi_resp = (struct aac_vmi_devinfo_resp *)&fib->data[0];
578 	if (vmi_resp->Status != ST_OK) {
579 		/*
580 		 * The only reason why this command will return an error is
581 		 * if the requested device doesn't exist.
582 		 */
583 		debug(1, "GetDeviceProbeInfo returned %d\n", vmi_resp->Status);
584 		aac_release_sync_fib(sc);
585 		return (CAM_DEV_NOT_THERE);
586 	}
587 
588 	cts->bus_width = ((vmi_resp->Inquiry7 & 0x60) >> 5);
589 	cts->valid = CCB_TRANS_BUS_WIDTH_VALID;
590 
591 	if (vmi_resp->ScsiRate) {
592 		cts->sync_period =
593 		    scsi_calc_syncparam((10000 / vmi_resp->ScsiRate));
594 		cts->sync_offset = vmi_resp->ScsiOffset;
595 		cts->valid |= CCB_TRANS_SYNC_RATE_VALID		|
596 			      CCB_TRANS_SYNC_OFFSET_VALID;
597 	}
598 
599 	cts->flags &= ~(CCB_TRANS_DISC_ENB | CCB_TRANS_TAG_ENB);
600 	cts->valid |= CCB_TRANS_DISC_VALID		|
601 		      CCB_TRANS_TQ_VALID;
602 
603 	aac_release_sync_fib(sc);
604 	return (CAM_REQ_CMP);
605 }
606