xref: /netbsd-src/sys/dev/i2o/dpti.c (revision b757af438b42b93f8c6571f026d8b8ef3eaf5fc9)
1 /*	$NetBSD: dpti.c,v 1.44 2011/08/07 13:39:23 rmind Exp $	*/
2 
3 /*-
4  * Copyright (c) 2001, 2007 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Andrew Doran.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 /*
33  * Copyright (c) 1996-2000 Distributed Processing Technology Corporation
34  * Copyright (c) 2000 Adaptec Corporation
35  * All rights reserved.
36  *
37  * TERMS AND CONDITIONS OF USE
38  *
39  * Redistribution and use in source form, with or without modification, are
40  * permitted provided that redistributions of source code must retain the
41  * above copyright notice, this list of conditions and the following disclaimer.
42  *
43  * This software is provided `as is' by Adaptec and any express or implied
44  * warranties, including, but not limited to, the implied warranties of
45  * merchantability and fitness for a particular purpose, are disclaimed. In no
46  * event shall Adaptec be liable for any direct, indirect, incidental, special,
47  * exemplary or consequential damages (including, but not limited to,
48  * procurement of substitute goods or services; loss of use, data, or profits;
49  * or business interruptions) however caused and on any theory of liability,
50  * whether in contract, strict liability, or tort (including negligence or
51  * otherwise) arising in any way out of the use of this driver software, even
52  * if advised of the possibility of such damage.
53  */
54 
55 /*
56  * Adaptec/DPT I2O control interface.
57  */
58 
59 #include <sys/cdefs.h>
60 __KERNEL_RCSID(0, "$NetBSD: dpti.c,v 1.44 2011/08/07 13:39:23 rmind Exp $");
61 
62 #include <sys/param.h>
63 #include <sys/systm.h>
64 #include <sys/kernel.h>
65 #include <sys/device.h>
66 #include <sys/queue.h>
67 #include <sys/proc.h>
68 #include <sys/endian.h>
69 #include <sys/malloc.h>
70 #include <sys/conf.h>
71 #include <sys/ioctl.h>
72 #include <sys/kauth.h>
73 
74 #include <sys/bus.h>
75 #ifdef __i386__
76 #include <machine/pio.h>
77 #include <machine/cputypes.h>
78 #endif
79 
80 #include <dev/i2o/i2o.h>
81 #include <dev/i2o/i2odpt.h>
82 #include <dev/i2o/iopio.h>
83 #include <dev/i2o/iopvar.h>
84 #include <dev/i2o/dptivar.h>
85 
86 #ifdef I2ODEBUG
87 #define	DPRINTF(x)		printf x
88 #else
89 #define	DPRINTF(x)
90 #endif
91 
92 static struct dpt_sig dpti_sig = {
93 	{ 'd', 'P', 't', 'S', 'i', 'G'},
94 	SIG_VERSION,
95 #if defined(__i386__)
96 	PROC_INTEL,
97 #elif defined(__powerpc__)
98 	PROC_POWERPC,
99 #elif defined(__alpha__)
100 	PROC_ALPHA,
101 #elif defined(__mips__)
102 	PROC_MIPS,
103 #elif defined(__sparc64__)
104 	PROC_ULTRASPARC,
105 #endif
106 #if defined(__i386__)
107 	PROC_386 | PROC_486 | PROC_PENTIUM | PROC_SEXIUM,
108 #else
109 	0,
110 #endif
111 	FT_HBADRVR,
112 	0,
113 	OEM_DPT,
114 	OS_FREE_BSD,	/* XXX */
115 	CAP_ABOVE16MB,
116 	DEV_ALL,
117 	ADF_ALL_SC5,
118 	0,
119 	0,
120 	DPTI_VERSION,
121 	DPTI_REVISION,
122 	DPTI_SUBREVISION,
123 	DPTI_MONTH,
124 	DPTI_DAY,
125 	DPTI_YEAR,
126 	""		/* Will be filled later */
127 };
128 
129 void	dpti_attach(device_t, device_t, void *);
130 int	dpti_blinkled(struct dpti_softc *);
131 int	dpti_ctlrinfo(struct dpti_softc *, int, void *);
132 int	dpti_match(device_t, cfdata_t, void *);
133 int	dpti_passthrough(struct dpti_softc *, void *, struct proc *);
134 int	dpti_sysinfo(struct dpti_softc *, int, void *);
135 
136 dev_type_open(dptiopen);
137 dev_type_ioctl(dptiioctl);
138 
139 const struct cdevsw dpti_cdevsw = {
140 	dptiopen, nullclose, noread, nowrite, dptiioctl,
141 	nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
142 };
143 
144 extern struct cfdriver dpti_cd;
145 
146 CFATTACH_DECL(dpti, sizeof(struct dpti_softc),
147     dpti_match, dpti_attach, NULL, NULL);
148 
149 int
150 dpti_match(device_t parent, cfdata_t match, void *aux)
151 {
152 	struct iop_attach_args *ia;
153 	struct iop_softc *iop;
154 
155 	ia = aux;
156 	iop = (struct iop_softc *)parent;
157 
158 	if (ia->ia_class != I2O_CLASS_ANY || ia->ia_tid != I2O_TID_IOP)
159 		return (0);
160 
161 	if (le16toh(iop->sc_status.orgid) != I2O_ORG_DPT)
162 		return (0);
163 
164 	return (1);
165 }
166 
167 void
168 dpti_attach(device_t parent, device_t self, void *aux)
169 {
170 	struct iop_softc *iop;
171 	struct dpti_softc *sc;
172 	struct {
173 		struct	i2o_param_op_results pr;
174 		struct	i2o_param_read_results prr;
175 		struct	i2o_dpt_param_exec_iop_buffers dib;
176 	} __packed param;
177 	int rv;
178 
179 	sc = device_private(self);
180 	iop = device_private(parent);
181 
182 	/*
183 	 * Tell the world what we are.  The description in the signature
184 	 * must be no more than 46 bytes long (see dptivar.h).
185 	 */
186 	printf(": DPT/Adaptec RAID management interface\n");
187 	snprintf(dpti_sig.dsDescription, sizeof(dpti_sig.dsDescription),
188 	    "NetBSD %s I2O OSM", osrelease);
189 
190 	rv = iop_field_get_all(iop, I2O_TID_IOP,
191 	    I2O_DPT_PARAM_EXEC_IOP_BUFFERS, &param,
192 	    sizeof(param), NULL);
193 	if (rv != 0)
194 		return;
195 
196 	sc->sc_blinkled = le32toh(param.dib.serialoutputoff) + 8;
197 }
198 
199 int
200 dptiopen(dev_t dev, int flag, int mode,
201     struct lwp *l)
202 {
203 
204 	if (device_lookup(&dpti_cd, minor(dev)) == NULL)
205 		return (ENXIO);
206 
207 	return (0);
208 }
209 
210 int
211 dptiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
212 {
213 	struct iop_softc *iop;
214 	struct dpti_softc *sc;
215 	struct ioctl_pt *pt;
216 	int i, size, rv, linux;
217 
218 	sc = device_lookup_private(&dpti_cd, minor(dev));
219 	iop = (struct iop_softc *)device_parent(&sc->sc_dv);
220 	rv = 0;
221 
222 	if (cmd == PTIOCLINUX) {
223 		pt = (struct ioctl_pt *)data;
224 		size = IOCPARM_LEN(pt->com);
225 		cmd = pt->com & 0xffff;
226 		data = pt->data;
227 		linux = 1;
228 	} else {
229 		size = IOCPARM_LEN(cmd);
230 		cmd = cmd & 0xffff;
231 		linux = 0;
232 	}
233 
234 	switch (cmd) {
235 	case DPT_SIGNATURE:
236 		if (size > sizeof(dpti_sig))
237 			size = sizeof(dpti_sig);
238 		memcpy(data, &dpti_sig, size);
239 		break;
240 
241 	case DPT_CTRLINFO:
242 		rv = dpti_ctlrinfo(sc, size, data);
243 		break;
244 
245 	case DPT_SYSINFO:
246 		rv = dpti_sysinfo(sc, size, data);
247 		break;
248 
249 	case DPT_BLINKLED:
250 		if ((i = dpti_blinkled(sc)) == -1)
251 			i = 0;
252 
253 		if (size == 0) {
254 			rv = copyout(&i, *(void **)data, sizeof(i));
255 			break;
256 		}
257 
258 		*(int *)data = i;
259 		break;
260 
261 	case DPT_TARGET_BUSY:
262 		/*
263 		 * XXX This is here to stop linux_machdepioctl() from
264 		 * whining about an unknown ioctl.
265 		 */
266 		rv = EIO;
267 		break;
268 
269 	case DPT_I2OUSRCMD:
270 		rv = kauth_authorize_device_passthru(l->l_cred, dev,
271 		    KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_ALL, data);
272 		if (rv)
273 			break;
274 
275 		mutex_enter(&iop->sc_conflock);
276 		if (linux) {
277 			rv = dpti_passthrough(sc, data, l->l_proc);
278 		} else {
279 			rv = dpti_passthrough(sc, *(void **)data, l->l_proc);
280 		}
281 		mutex_exit(&iop->sc_conflock);
282 		break;
283 
284 	case DPT_I2ORESETCMD:
285 		printf("%s: I2ORESETCMD not implemented\n",
286 		    device_xname(&sc->sc_dv));
287 		rv = EOPNOTSUPP;
288 		break;
289 
290 	case DPT_I2ORESCANCMD:
291 		mutex_enter(&iop->sc_conflock);
292 		rv = iop_reconfigure(iop, 0);
293 		mutex_exit(&iop->sc_conflock);
294 		break;
295 
296 	default:
297 		rv = ENOTTY;
298 		break;
299 	}
300 
301 	return (rv);
302 }
303 
304 int
305 dpti_blinkled(struct dpti_softc *sc)
306 {
307 	struct iop_softc *iop;
308 	u_int v;
309 
310 	iop = (struct iop_softc *)device_parent(&sc->sc_dv);
311 
312 	v = bus_space_read_1(iop->sc_iot, iop->sc_ioh, sc->sc_blinkled + 0);
313 	if (v == 0xbc) {
314 		v = bus_space_read_1(iop->sc_iot, iop->sc_ioh,
315 		    sc->sc_blinkled + 1);
316 		return (v);
317 	}
318 
319 	return (-1);
320 }
321 
322 int
323 dpti_ctlrinfo(struct dpti_softc *sc, int size, void *data)
324 {
325 	struct dpt_ctlrinfo info;
326 	struct iop_softc *iop;
327 	int rv, i;
328 
329 	iop = (struct iop_softc *)device_parent(&sc->sc_dv);
330 
331 	memset(&info, 0, sizeof(info));
332 
333 	info.length = sizeof(info) - sizeof(u_int16_t);
334 	info.drvrHBAnum = device_unit(&sc->sc_dv);
335 	info.baseAddr = iop->sc_memaddr;
336 	if ((i = dpti_blinkled(sc)) == -1)
337 		i = 0;
338 	info.blinkState = i;
339 	info.pciBusNum = iop->sc_pcibus;
340 	info.pciDeviceNum = iop->sc_pcidev;
341 	info.hbaFlags = FLG_OSD_PCI_VALID | FLG_OSD_DMA | FLG_OSD_I2O;
342 	info.Interrupt = 10;			/* XXX */
343 
344 	if (size > sizeof(char)) {
345 		memcpy(data, &info, min(sizeof(info), size));
346 		rv = 0;
347 	} else
348 		rv = copyout(&info, *(void **)data, sizeof(info));
349 
350 	return (rv);
351 }
352 
353 int
354 dpti_sysinfo(struct dpti_softc *sc, int size, void *data)
355 {
356 	struct dpt_sysinfo info;
357 	int rv;
358 #ifdef __i386__
359 	int i, j;
360 #endif
361 
362 	memset(&info, 0, sizeof(info));
363 
364 #ifdef __i386__
365 	outb (0x70, 0x12);
366 	i = inb(0x71);
367 	j = i >> 4;
368 	if (i == 0x0f) {
369 		outb (0x70, 0x19);
370 		j = inb (0x71);
371 	}
372 	info.drive0CMOS = j;
373 
374 	j = i & 0x0f;
375 	if (i == 0x0f) {
376 		outb (0x70, 0x1a);
377 		j = inb (0x71);
378 	}
379 	info.drive1CMOS = j;
380 	info.processorFamily = dpti_sig.dsProcessorFamily;
381 
382 	/*
383 	 * Get the conventional memory size from CMOS.
384 	 */
385 	outb(0x70, 0x16);
386 	j = inb(0x71);
387 	j <<= 8;
388 	outb(0x70, 0x15);
389 	j |= inb(0x71);
390 	info.conventionalMemSize = j;
391 
392 	/*
393 	 * Get the extended memory size from CMOS.
394 	 */
395 	outb(0x70, 0x31);
396 	j = inb(0x71);
397 	j <<= 8;
398 	outb(0x70, 0x30);
399 	j |= inb(0x71);
400 	info.extendedMemSize = j;
401 
402 	switch (cpu_class) {
403 	case CPUCLASS_386:
404 		info.processorType = PROC_386;
405 		break;
406 	case CPUCLASS_486:
407 		info.processorType = PROC_486;
408 		break;
409 	case CPUCLASS_586:
410 		info.processorType = PROC_PENTIUM;
411 		break;
412 	case CPUCLASS_686:
413 	default:
414 		info.processorType = PROC_SEXIUM;
415 		break;
416 	}
417 
418 	info.flags = SI_CMOS_Valid | SI_BusTypeValid |
419 	    SI_MemorySizeValid | SI_NO_SmartROM;
420 #else
421 	info.flags = SI_BusTypeValid | SI_NO_SmartROM;
422 #endif
423 
424 	info.busType = SI_PCI_BUS;
425 
426 	/*
427 	 * Copy out the info structure to the user.
428 	 */
429 	if (size > sizeof(char)) {
430 		memcpy(data, &info, min(sizeof(info), size));
431 		rv = 0;
432 	} else
433 		rv = copyout(&info, *(void **)data, sizeof(info));
434 
435 	return (rv);
436 }
437 
438 int
439 dpti_passthrough(struct dpti_softc *sc, void *data, struct proc *proc)
440 {
441 	struct iop_softc *iop;
442 	struct i2o_msg mh, *mf;
443 	struct i2o_reply rh;
444 	struct iop_msg *im;
445 	struct dpti_ptbuf bufs[IOP_MAX_MSG_XFERS];
446 	u_int32_t mbtmp[IOP_MAX_MSG_SIZE / sizeof(u_int32_t)];
447 	u_int32_t rbtmp[IOP_MAX_MSG_SIZE / sizeof(u_int32_t)];
448 	int rv, msgsize, repsize, sgoff, i, mapped, nbuf, nfrag, j, sz;
449 	u_int32_t *p, *pmax;
450 
451 	iop = (struct iop_softc *)device_parent(&sc->sc_dv);
452 	im = NULL;
453 
454 	if ((rv = dpti_blinkled(sc)) != -1) {
455 		if (rv != 0) {
456 			aprint_error_dev(&sc->sc_dv, "adapter blinkled = 0x%02x\n", rv);
457 			return (EIO);
458 		}
459 	}
460 
461 	/*
462 	 * Copy in the message frame header and determine the size of the
463 	 * full message frame.
464 	 */
465 	if ((rv = copyin(data, &mh, sizeof(mh))) != 0) {
466 		DPRINTF(("%s: message copyin failed\n",
467 		    device_xname(&sc->sc_dv)));
468 		return (rv);
469 	}
470 
471 	msgsize = (mh.msgflags >> 14) & ~3;
472 	if (msgsize < sizeof(mh) || msgsize >= IOP_MAX_MSG_SIZE) {
473 		DPRINTF(("%s: bad message frame size\n",
474 		    device_xname(&sc->sc_dv)));
475 		return (EINVAL);
476 	}
477 
478 	/*
479 	 * Handle special commands.
480 	 */
481 	switch (mh.msgfunc >> 24) {
482 	case I2O_EXEC_IOP_RESET:
483 		printf("%s: I2O_EXEC_IOP_RESET not implemented\n",
484 		    device_xname(&sc->sc_dv));
485 		return (EOPNOTSUPP);
486 
487 	case I2O_EXEC_OUTBOUND_INIT:
488 		printf("%s: I2O_EXEC_OUTBOUND_INIT not implemented\n",
489 		    device_xname(&sc->sc_dv));
490 		return (EOPNOTSUPP);
491 
492 	case I2O_EXEC_SYS_TAB_SET:
493 		printf("%s: I2O_EXEC_SYS_TAB_SET not implemented\n",
494 		    device_xname(&sc->sc_dv));
495 		return (EOPNOTSUPP);
496 
497 	case I2O_EXEC_STATUS_GET:
498 		if ((rv = iop_status_get(iop, 0)) == 0)
499 			rv = copyout(&iop->sc_status, (char *)data + msgsize,
500 			    sizeof(iop->sc_status));
501 		return (rv);
502 	}
503 
504 	/*
505 	 * Copy in the full message frame.
506 	 */
507 	if ((rv = copyin(data, mbtmp, msgsize)) != 0) {
508 		DPRINTF(("%s: full message copyin failed\n",
509 		    device_xname(&sc->sc_dv)));
510 		return (rv);
511 	}
512 
513 	/*
514 	 * Determine the size of the reply frame, and copy it in.
515 	 */
516 	if ((rv = copyin((char *)data + msgsize, &rh, sizeof(rh))) != 0) {
517 		DPRINTF(("%s: reply copyin failed\n",
518 		    device_xname(&sc->sc_dv)));
519 		return (rv);
520 	}
521 
522 	repsize = (rh.msgflags >> 14) & ~3;
523 	if (repsize < sizeof(rh) || repsize >= IOP_MAX_MSG_SIZE) {
524 		DPRINTF(("%s: bad reply header size\n",
525 		    device_xname(&sc->sc_dv)));
526 		return (EINVAL);
527 	}
528 
529 	if ((rv = copyin((char *)data + msgsize, rbtmp, repsize)) != 0) {
530 		DPRINTF(("%s: reply too large\n", device_xname(&sc->sc_dv)));
531 		return (rv);
532 	}
533 
534 	/*
535 	 * If the message has a scatter gather list, it must be comprised of
536 	 * simple elements.  If any one transfer contains multiple segments,
537 	 * we allocate a temporary buffer for it; otherwise, the buffer will
538 	 * be mapped directly.
539 	 */
540 	mapped = 0;
541 	if ((sgoff = ((mh.msgflags >> 4) & 15)) != 0) {
542 		if ((sgoff + 2) > (msgsize >> 2)) {
543 			DPRINTF(("%s: invalid message size fields\n",
544 			    device_xname(&sc->sc_dv)));
545 			return (EINVAL);
546 		}
547 
548 		memset(bufs, 0, sizeof(bufs));
549 
550 		p = mbtmp + sgoff;
551 		pmax = mbtmp + (msgsize >> 2) - 2;
552 
553 		for (nbuf = 0; nbuf < IOP_MAX_MSG_XFERS; nbuf++, p += 2) {
554 			if (p > pmax) {
555 				DPRINTF(("%s: invalid SGL (1)\n",
556 				    device_xname(&sc->sc_dv)));
557 				goto bad;
558 			}
559 
560 			if ((p[0] & 0x30000000) != I2O_SGL_SIMPLE) {
561 				DPRINTF(("%s: invalid SGL (2)\n",
562 				    device_xname(&sc->sc_dv)));
563 				goto bad;
564 			}
565 
566 			bufs[nbuf].db_out = (p[0] & I2O_SGL_DATA_OUT) != 0;
567 			bufs[nbuf].db_ptr = NULL;
568 
569 			if ((p[0] & I2O_SGL_END_BUFFER) != 0) {
570 				if ((p[0] & 0x00ffffff) > IOP_MAX_XFER) {
571 					DPRINTF(("%s: buffer too large\n",
572 					    device_xname(&sc->sc_dv)));
573 					goto bad;
574 				}
575 
576 				bufs[nbuf].db_ptr = (void *)p[1];
577 				bufs[nbuf].db_proc = proc;
578 				bufs[nbuf].db_size = p[0] & 0x00ffffff;
579 
580 				if ((p[0] & I2O_SGL_END) != 0)
581 					break;
582 
583 				continue;
584 			}
585 
586 			/*
587 			 * The buffer has multiple segments.  Determine the
588 			 * total size.
589 			 */
590 			nfrag = 0;
591 			sz = 0;
592 			for (; p <= pmax; p += 2) {
593 				if (nfrag == DPTI_MAX_SEGS) {
594 					DPRINTF(("%s: too many segments\n",
595 					    device_xname(&sc->sc_dv)));
596 					goto bad;
597 				}
598 
599 				bufs[nbuf].db_frags[nfrag].iov_len =
600 				    p[0] & 0x00ffffff;
601 				bufs[nbuf].db_frags[nfrag].iov_base =
602 				    (void *)p[1];
603 
604 				sz += p[0] & 0x00ffffff;
605 				nfrag++;
606 
607 				if ((p[0] & I2O_SGL_END) != 0) {
608 					if ((p[0] & I2O_SGL_END_BUFFER) == 0) {
609 						DPRINTF((
610 						    "%s: invalid SGL (3)\n",
611 						    device_xname(&sc->sc_dv)));
612 						goto bad;
613 					}
614 					break;
615 				}
616 				if ((p[0] & I2O_SGL_END_BUFFER) != 0)
617 					break;
618 			}
619 			bufs[nbuf].db_nfrag = nfrag;
620 
621 			if (p > pmax) {
622 				DPRINTF(("%s: invalid SGL (4)\n",
623 				    device_xname(&sc->sc_dv)));
624 				goto bad;
625 			}
626 
627 			if (sz > IOP_MAX_XFER) {
628 				DPRINTF(("%s: buffer too large\n",
629 				    device_xname(&sc->sc_dv)));
630 				goto bad;
631 			}
632 
633 			bufs[nbuf].db_size = sz;
634 			bufs[nbuf].db_ptr = malloc(sz, M_DEVBUF, M_WAITOK);
635 			if (bufs[nbuf].db_ptr == NULL) {
636 				DPRINTF(("%s: allocation failure\n",
637 				    device_xname(&sc->sc_dv)));
638 				rv = ENOMEM;
639 				goto bad;
640 			}
641 
642 			for (i = 0, sz = 0; i < bufs[nbuf].db_nfrag; i++) {
643 				rv = copyin(bufs[nbuf].db_frags[i].iov_base,
644 				    (char *)bufs[nbuf].db_ptr + sz,
645 				    bufs[nbuf].db_frags[i].iov_len);
646 				if (rv != 0) {
647 					DPRINTF(("%s: frag copyin\n",
648 					    device_xname(&sc->sc_dv)));
649 					goto bad;
650 				}
651 				sz += bufs[nbuf].db_frags[i].iov_len;
652 			}
653 
654 			if ((p[0] & I2O_SGL_END) != 0)
655 				break;
656 		}
657 
658 		if (nbuf == IOP_MAX_MSG_XFERS) {
659 			DPRINTF(("%s: too many transfers\n",
660 			    device_xname(&sc->sc_dv)));
661 			goto bad;
662 		}
663 	} else
664 		nbuf = -1;
665 
666 	/*
667 	 * Allocate a wrapper, and adjust the message header fields to
668 	 * indicate that no scatter-gather list is currently present.
669 	 */
670 
671 	im = iop_msg_alloc(iop, IM_WAIT | IM_NOSTATUS);
672 	im->im_rb = (struct i2o_reply *)rbtmp;
673 	mf = (struct i2o_msg *)mbtmp;
674 	mf->msgictx = IOP_ICTX;
675 	mf->msgtctx = im->im_tctx;
676 
677 	if (sgoff != 0)
678 		mf->msgflags = (mf->msgflags & 0xff0f) | (sgoff << 16);
679 
680 	/*
681 	 * Map the data transfer(s).
682 	 */
683 	for (i = 0; i <= nbuf; i++) {
684 		rv = iop_msg_map(iop, im, mbtmp, bufs[i].db_ptr,
685 		    bufs[i].db_size, bufs[i].db_out, bufs[i].db_proc);
686 		if (rv != 0) {
687 			DPRINTF(("%s: msg_map failed, rv = %d\n",
688 			    device_xname(&sc->sc_dv), rv));
689 			goto bad;
690 		}
691 		mapped = 1;
692 	}
693 
694 	/*
695 	 * Start the command and sleep until it completes.
696 	 */
697 	if ((rv = iop_msg_post(iop, im, mbtmp, 5*60*1000)) != 0)
698 		goto bad;
699 
700 	/*
701 	 * Copy out the reply frame.
702 	 */
703 	if ((rv = copyout(rbtmp, (char *)data + msgsize, repsize)) != 0) {
704 		DPRINTF(("%s: reply copyout() failed\n",
705 		    device_xname(&sc->sc_dv)));
706 	}
707 
708  bad:
709 	/*
710 	 * Free resources and return to the caller.
711 	 */
712 	if (im != NULL) {
713 		if (mapped)
714 			iop_msg_unmap(iop, im);
715 		iop_msg_free(iop, im);
716 	}
717 
718 	for (i = 0; i <= nbuf; i++) {
719 		if (bufs[i].db_proc != NULL)
720 			continue;
721 
722 		if (!bufs[i].db_out && rv == 0) {
723 			for (j = 0, sz = 0; j < bufs[i].db_nfrag; j++) {
724 				rv = copyout((char *)bufs[i].db_ptr + sz,
725 				    bufs[i].db_frags[j].iov_base,
726 				    bufs[i].db_frags[j].iov_len);
727 				if (rv != 0)
728 					break;
729 				sz += bufs[i].db_frags[j].iov_len;
730 			}
731 		}
732 
733 		if (bufs[i].db_ptr != NULL)
734 			free(bufs[i].db_ptr, M_DEVBUF);
735 	}
736 
737 	return (rv);
738 }
739