1/*	$NetBSD$	*/
2
3/*
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33/*
34 * Device I/O routines using Open Firmware
35 */
36#include <sys/param.h>
37#include <sys/disklabel.h>
38#ifdef NETBOOT
39#include <netinet/in.h>
40#endif
41
42#include <lib/libsa/stand.h>
43#include <lib/libsa/ufs.h>
44#include <lib/libsa/lfs.h>
45#include <lib/libsa/cd9660.h>
46#ifdef NETBOOT
47#include <lib/libsa/nfs.h>
48#include <lib/libsa/tftp.h>
49#endif
50#include <lib/libkern/libkern.h>
51
52#include <dev/sun/disklabel.h>
53#include <dev/raidframe/raidframevar.h>
54
55#include <machine/promlib.h>
56
57#include "ofdev.h"
58#include "boot.h"
59#include "net.h"
60
61extern char bootdev[];
62extern bool root_fs_quickseekable;
63
64/*
65 * This is ugly.  A path on a sparc machine is something like this:
66 *
67 *	[device] [-<options] [path] [-options] [otherstuff] [-<more options]
68 *
69 */
70
71char *
72filename(char *str, char *ppart)
73{
74	char *cp, *lp;
75	char savec;
76	int dhandle;
77	char devtype[16];
78
79	lp = str;
80	devtype[0] = 0;
81	*ppart = '\0';
82	for (cp = str; *cp; lp = cp) {
83		/* For each component of the path name... */
84		while (*++cp && *cp != '/');
85		savec = *cp;
86		*cp = 0;
87		/* ...look whether there is a device with this name */
88		dhandle = prom_finddevice(str);
89		DPRINTF(("filename: prom_finddevice(%s) returned %x\n",
90		       str, dhandle));
91		*cp = savec;
92		if (dhandle == -1) {
93			/*
94			 * if not, lp is the delimiter between device and
95			 * path.  if the last component was a block device.
96			 */
97			if (!strcmp(devtype, "block")) {
98				/* search for arguments */
99				DPRINTF(("filename: hunting for arguments "
100				       "in %s\n", lp));
101				for (cp = lp; ; ) {
102					cp--;
103					if (cp < str ||
104					    cp[0] == '/' ||
105					    (cp[0] == ' ' && (cp+1) != lp &&
106					     cp[1] == '-'))
107						break;
108				}
109				if (cp >= str && *cp == '-')
110					/* found arguments, make firmware
111					   ignore them */
112					*cp = 0;
113				for (cp = lp; *--cp && *cp != ','
114					&& *cp != ':';)
115						;
116				if (cp[0] == ':' && cp[1] >= 'a' &&
117				    cp[1] <= 'a' + MAXPARTITIONS) {
118					*ppart = cp[1];
119					cp[0] = '\0';
120				}
121			}
122			DPRINTF(("filename: found %s\n",lp));
123			return lp;
124		} else if (_prom_getprop(dhandle, "device_type", devtype,
125				sizeof devtype) < 0)
126			devtype[0] = 0;
127	}
128	DPRINTF(("filename: not found\n"));
129	return 0;
130}
131
132static int
133strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf, size_t *rsize)
134{
135	struct of_dev *dev = devdata;
136	u_quad_t pos;
137	int n;
138
139	if (rw != F_READ)
140		return EPERM;
141	if (dev->type != OFDEV_DISK)
142		panic("strategy");
143
144#ifdef NON_DEBUG
145	printf("strategy: block %lx, partition offset %lx, blksz %lx\n",
146	       (long)blk, (long)dev->partoff, (long)dev->bsize);
147	printf("strategy: seek position should be: %lx\n",
148	       (long)((blk + dev->partoff) * dev->bsize));
149#endif
150	pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;
151
152	for (;;) {
153#ifdef NON_DEBUG
154		printf("strategy: seeking to %lx\n", (long)pos);
155#endif
156		if (prom_seek(dev->handle, pos) < 0)
157			break;
158#ifdef NON_DEBUG
159		printf("strategy: reading %lx at %p\n", (long)size, buf);
160#endif
161		n = prom_read(dev->handle, buf, size);
162		if (n == -2)
163			continue;
164		if (n < 0)
165			break;
166		*rsize = n;
167		return 0;
168	}
169	return EIO;
170}
171
172static int
173devclose(struct open_file *of)
174{
175	struct of_dev *op = of->f_devdata;
176
177#ifdef NETBOOT
178	if (op->type == OFDEV_NET)
179		net_close(op);
180#endif
181	prom_close(op->handle);
182	op->handle = -1;
183	return 0;
184}
185
186static struct devsw ofdevsw[1] = {
187	{
188		"OpenFirmware",
189		strategy,
190		(int (*)(struct open_file *, ...))nodev,
191		devclose,
192		noioctl
193	}
194};
195int ndevs = sizeof ofdevsw / sizeof ofdevsw[0];
196
197
198#ifdef SPARC_BOOT_UFS
199static struct fs_ops file_system_ufs[] =
200{ FS_OPS(ufs), FS_OPS(ffsv2), FS_OPS(lfsv1), FS_OPS(lfsv2) };
201#endif
202#ifdef SPARC_BOOT_CD9660
203static struct fs_ops file_system_cd9660 = FS_OPS(cd9660);
204#endif
205#ifdef NETBOOT
206static struct fs_ops file_system_nfs = FS_OPS(nfs);
207static struct fs_ops file_system_tftp = FS_OPS(tftp);
208#endif
209
210struct fs_ops file_system[7];
211int nfsys;
212
213static struct of_dev ofdev = {
214	-1,
215};
216
217char opened_name[256];
218int floppyboot;
219
220/************************************************************************
221 *
222 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c
223 * and then substantially rewritten by Gordon W. Ross
224 *
225 ************************************************************************/
226
227/* What partition types to assume for Sun disklabels: */
228static u_char
229sun_fstypes[8] = {
230	FS_BSDFFS,	/* a */
231	FS_SWAP,	/* b */
232	FS_OTHER,	/* c - whole disk */
233	FS_BSDFFS,	/* d */
234	FS_BSDFFS,	/* e */
235	FS_BSDFFS,	/* f */
236	FS_BSDFFS,	/* g */
237	FS_BSDFFS,	/* h */
238};
239
240/*
241 * Given a SunOS disk label, set lp to a BSD disk label.
242 * Returns NULL on success, else an error string.
243 *
244 * The BSD label is cleared out before this is called.
245 */
246static char *
247disklabel_sun_to_bsd(char *cp, struct disklabel *lp)
248{
249	struct sun_disklabel *sl;
250	struct partition *npp;
251	struct sun_dkpart *spp;
252	int i, secpercyl;
253	u_short cksum, *sp1, *sp2;
254
255	sl = (struct sun_disklabel *)cp;
256
257	/* Verify the XOR check. */
258	sp1 = (u_short *)sl;
259	sp2 = (u_short *)(sl + 1);
260	cksum = 0;
261	while (sp1 < sp2)
262		cksum ^= *sp1++;
263	if (cksum != 0)
264		return("SunOS disk label, bad checksum");
265
266	/* Format conversion. */
267	lp->d_magic = DISKMAGIC;
268	lp->d_magic2 = DISKMAGIC;
269	memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname));
270
271	lp->d_secsize = 512;
272	lp->d_nsectors   = sl->sl_nsectors;
273	lp->d_ntracks    = sl->sl_ntracks;
274	lp->d_ncylinders = sl->sl_ncylinders;
275
276	secpercyl = sl->sl_nsectors * sl->sl_ntracks;
277	lp->d_secpercyl  = secpercyl;
278	lp->d_secperunit = secpercyl * sl->sl_ncylinders;
279
280	lp->d_sparespercyl = sl->sl_sparespercyl;
281	lp->d_acylinders   = sl->sl_acylinders;
282	lp->d_rpm          = sl->sl_rpm;
283	lp->d_interleave   = sl->sl_interleave;
284
285	lp->d_npartitions = 8;
286	/* These are as defined in <ufs/ffs/fs.h> */
287	lp->d_bbsize = 8192;	/* XXX */
288	lp->d_sbsize = 8192;	/* XXX */
289
290	for (i = 0; i < 8; i++) {
291		spp = &sl->sl_part[i];
292		npp = &lp->d_partitions[i];
293		npp->p_offset = spp->sdkp_cyloffset * secpercyl;
294		npp->p_size = spp->sdkp_nsectors;
295		DPRINTF(("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size));
296		if (npp->p_size == 0) {
297			npp->p_fstype = FS_UNUSED;
298		} else {
299			npp->p_fstype = sun_fstypes[i];
300			if (npp->p_fstype == FS_BSDFFS) {
301				/*
302				 * The sun label does not store the FFS fields,
303				 * so just set them with default values here.
304				 */
305				npp->p_fsize = 1024;
306				npp->p_frag = 8;
307				npp->p_cpg = 16;
308			}
309		}
310	}
311
312	lp->d_checksum = 0;
313	lp->d_checksum = dkcksum(lp);
314	DPRINTF(("disklabel_sun_to_bsd: success!\n"));
315	return (NULL);
316}
317
318/*
319 * Find a valid disklabel.
320 */
321static char *
322search_label(struct of_dev *devp, u_long off, char *buf,
323	     struct disklabel *lp, u_long off0)
324{
325	size_t readsize;
326	struct disklabel *dlp;
327	struct sun_disklabel *slp;
328
329	/* minimal requirements for archtypal disk label */
330	if (lp->d_secperunit == 0)
331		lp->d_secperunit = 0x1fffffff;
332	lp->d_npartitions = 1;
333	if (lp->d_partitions[0].p_size == 0)
334		lp->d_partitions[0].p_size = 0x1fffffff;
335	lp->d_partitions[0].p_offset = 0;
336
337	if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &readsize)
338	    || readsize != DEV_BSIZE)
339		return ("Cannot read label");
340	/* Check for a NetBSD disk label. */
341	dlp = (struct disklabel *) (buf + LABELOFFSET);
342	if (dlp->d_magic == DISKMAGIC) {
343		if (dkcksum(dlp))
344			return ("NetBSD disk label corrupted");
345		*lp = *dlp;
346		DPRINTF(("search_label: found NetBSD label\n"));
347		return (NULL);
348	}
349
350	/* Check for a Sun disk label (for PROM compatibility). */
351	slp = (struct sun_disklabel *) buf;
352	if (slp->sl_magic == SUN_DKMAGIC)
353		return (disklabel_sun_to_bsd(buf, lp));
354
355
356	memset(buf, 0, sizeof(buf));
357	return ("no disk label");
358}
359
360int
361devopen(struct open_file *of, const char *name, char **file)
362{
363	char *cp;
364	char partition;
365	char fname[256], devname[256];
366	union {
367		char buf[DEV_BSIZE];
368		struct disklabel label;
369	} b;
370	struct disklabel label;
371	int handle, part, try = 0;
372	size_t readsize;
373	char *errmsg = NULL, *pp = NULL, savedpart = 0;
374	int error = 0;
375
376	if (ofdev.handle != -1)
377		panic("devopen");
378	if (of->f_flags != F_READ)
379		return EPERM;
380	DPRINTF(("devopen: you want %s\n", name));
381	strcpy(fname, name);
382	cp = filename(fname, &partition);
383	if (cp) {
384		strcpy(b.buf, cp);
385		*cp = 0;
386	}
387	if (!cp || !b.buf[0])
388		strcpy(b.buf, DEFAULT_KERNEL);
389	if (!*fname)
390		strcpy(fname, bootdev);
391	strcpy(opened_name, fname);
392	if (partition) {
393		cp = opened_name + strlen(opened_name);
394		*cp++ = ':';
395		*cp++ = partition;
396		*cp = 0;
397	}
398	*file = opened_name + strlen(opened_name);
399	if (b.buf[0] != '/')
400		strcat(opened_name, "/");
401	strcat(opened_name, b.buf);
402	DPRINTF(("devopen: trying %s\n", fname));
403	if ((handle = prom_finddevice(fname)) == -1)
404		return ENOENT;
405	DPRINTF(("devopen: found %s\n", fname));
406	if (_prom_getprop(handle, "name", b.buf, sizeof b.buf) < 0)
407		return ENXIO;
408	DPRINTF(("devopen: %s is called %s\n", fname, b.buf));
409	floppyboot = !strcmp(b.buf, "floppy");
410	if (_prom_getprop(handle, "device_type", b.buf, sizeof b.buf) < 0)
411		return ENXIO;
412	DPRINTF(("devopen: %s is a %s device\n", fname, b.buf));
413	if (!strcmp(b.buf, "block")) {
414		pp = strrchr(fname, ':');
415		if (pp && pp[1] >= 'a' && pp[1] <= 'f' && pp[2] == 0) {
416			savedpart = pp[1];
417		} else {
418			savedpart = 'a';
419			handle = prom_open(fname);
420			if (handle != -1) {
421				OF_instance_to_path(handle, devname,
422				    sizeof(devname));
423				DPRINTF(("real path: %s\n", devname));
424				prom_close(handle);
425				pp = devname + strlen(devname);
426				if (pp > devname + 3) pp -= 2;
427				if (pp[0] == ':')
428					savedpart = pp[1];
429			}
430			pp = fname + strlen(fname);
431			pp[0] = ':';
432			pp[2] = '\0';
433		}
434		pp[1] = 'c';
435		DPRINTF(("devopen: replacing by whole disk device %s\n",
436		    fname));
437		if (savedpart)
438			partition = savedpart;
439	}
440
441open_again:
442	DPRINTF(("devopen: opening %s\n", fname));
443	if ((handle = prom_open(fname)) == -1) {
444		DPRINTF(("devopen: open of %s failed\n", fname));
445		if (pp && savedpart) {
446			if (try == 0) {
447				pp[0] = '\0';
448				try = 1;
449			} else {
450				pp[0] = ':';
451				pp[1] = savedpart;
452				pp = NULL;
453				savedpart = '\0';
454			}
455			goto open_again;
456		}
457		return ENXIO;
458	}
459	DPRINTF(("devopen: %s is now open\n", fname));
460	memset(&ofdev, 0, sizeof ofdev);
461	ofdev.handle = handle;
462	if (!strcmp(b.buf, "block")) {
463		ofdev.type = OFDEV_DISK;
464		ofdev.bsize = DEV_BSIZE;
465		/* First try to find a disklabel without MBR partitions */
466		DPRINTF(("devopen: trying to read disklabel\n"));
467		if (strategy(&ofdev, F_READ,
468			     LABELSECTOR, DEV_BSIZE, b.buf, &readsize) != 0
469		    || readsize != DEV_BSIZE
470		    || (errmsg = getdisklabel(b.buf, &label))) {
471			if (errmsg) {
472				DPRINTF(("devopen: getdisklabel returned %s\n",
473					errmsg));
474			}
475			/* Else try MBR partitions */
476			errmsg = search_label(&ofdev, 0, b.buf, &label, 0);
477			if (errmsg) {
478				printf("devopen: search_label returned %s\n", errmsg);
479				error = ERDLAB;
480			}
481			if (error && error != ERDLAB)
482				goto bad;
483		}
484
485		if (error == ERDLAB) {
486			/* No, label, just use complete disk */
487			ofdev.partoff = 0;
488			if (pp && savedpart) {
489				pp[1] = savedpart;
490				prom_close(handle);
491				if ((handle = prom_open(fname)) == -1) {
492					DPRINTF(("devopen: open of %s failed\n",
493						fname));
494					return ENXIO;
495				}
496				ofdev.handle = handle;
497				DPRINTF(("devopen: back to original device %s\n",
498					fname));
499			}
500		} else {
501			part = partition ? partition - 'a' : 0;
502			ofdev.partoff = label.d_partitions[part].p_offset;
503			DPRINTF(("devopen: setting partition %d offset %lx\n",
504			       part, ofdev.partoff));
505			if (label.d_partitions[part].p_fstype == FS_RAID) {
506				ofdev.partoff += RF_PROTECTED_SECTORS;
507				DPRINTF(("devopen: found RAID partition, "
508				    "adjusting offset to %lx\n", ofdev.partoff));
509			}
510		}
511
512		nfsys = 0;
513		of->f_dev = ofdevsw;
514		of->f_devdata = &ofdev;
515#ifdef SPARC_BOOT_UFS
516		memcpy(&file_system[nfsys++], &file_system_ufs[0], sizeof file_system[0]);
517		memcpy(&file_system[nfsys++], &file_system_ufs[1], sizeof file_system[0]);
518		memcpy(&file_system[nfsys++], &file_system_ufs[2], sizeof file_system[0]);
519		memcpy(&file_system[nfsys++], &file_system_ufs[3], sizeof file_system[0]);
520#endif
521#ifdef SPARC_BOOT_CD9660
522		memcpy(&file_system[nfsys++], &file_system_cd9660, sizeof file_system[0]);
523#endif
524		DPRINTF(("devopen: return 0\n"));
525		return 0;
526	}
527#ifdef NETBOOT
528	if (!strcmp(b.buf, "network")) {
529		if ((error = net_open(&ofdev)) != 0)
530			goto bad;
531
532		ofdev.type = OFDEV_NET;
533		of->f_dev = ofdevsw;
534		of->f_devdata = &ofdev;
535
536		if (!strncmp(*file,"/tftp:",6)) {
537			*file += 6;
538			memcpy(&file_system[0], &file_system_tftp, sizeof file_system[0]);
539			if (net_tftp_bootp((int **)&of->f_devdata)) {
540				net_close(&ofdev);
541				goto bad;
542			}
543			root_fs_quickseekable = false;
544		} else {
545			memcpy(&file_system[0], &file_system_nfs, sizeof file_system[0]);
546			if ((error = net_mountroot()) != 0) {
547				net_close(&ofdev);
548				goto bad;
549			}
550		}
551		nfsys = 1;
552		return 0;
553	}
554#endif
555	error = EFTYPE;
556bad:
557	DPRINTF(("devopen: error %d, cannot open device\n", error));
558	prom_close(handle);
559	ofdev.handle = -1;
560	return error;
561}
562