Commit | Line | Data |
---|---|---|
97894cda | 1 | /* |
1da177e4 LT |
2 | * inftlmount.c -- INFTL mount code with extensive checks. |
3 | * | |
4 | * Author: Greg Ungerer (gerg@snapgear.com) | |
5 | * (C) Copyright 2002-2003, Greg Ungerer (gerg@snapgear.com) | |
6 | * | |
7 | * Based heavily on the nftlmount.c code which is: | |
97894cda | 8 | * Author: Fabrice Bellard (fabrice.bellard@netgem.com) |
1da177e4 LT |
9 | * Copyright (C) 2000 Netgem S.A. |
10 | * | |
97894cda | 11 | * $Id: inftlmount.c,v 1.18 2005/11/07 11:14:20 gleixner Exp $ |
1da177e4 LT |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <asm/errno.h> | |
31 | #include <asm/io.h> | |
32 | #include <asm/uaccess.h> | |
33 | #include <linux/miscdevice.h> | |
1da177e4 LT |
34 | #include <linux/delay.h> |
35 | #include <linux/slab.h> | |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <linux/mtd/mtd.h> | |
38 | #include <linux/mtd/nftl.h> | |
39 | #include <linux/mtd/inftl.h> | |
40 | #include <linux/mtd/compatmac.h> | |
41 | ||
97894cda | 42 | char inftlmountrev[]="$Revision: 1.18 $"; |
1da177e4 | 43 | |
8593fbc6 TG |
44 | extern int inftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len, |
45 | size_t *retlen, uint8_t *buf); | |
46 | extern int inftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len, | |
47 | size_t *retlen, uint8_t *buf); | |
48 | ||
1da177e4 LT |
49 | /* |
50 | * find_boot_record: Find the INFTL Media Header and its Spare copy which | |
51 | * contains the various device information of the INFTL partition and | |
52 | * Bad Unit Table. Update the PUtable[] table according to the Bad | |
53 | * Unit Table. PUtable[] is used for management of Erase Unit in | |
54 | * other routines in inftlcore.c and inftlmount.c. | |
55 | */ | |
56 | static int find_boot_record(struct INFTLrecord *inftl) | |
57 | { | |
58 | struct inftl_unittail h1; | |
59 | //struct inftl_oob oob; | |
60 | unsigned int i, block; | |
61 | u8 buf[SECTORSIZE]; | |
62 | struct INFTLMediaHeader *mh = &inftl->MediaHdr; | |
f4a43cfc | 63 | struct mtd_info *mtd = inftl->mbd.mtd; |
1da177e4 LT |
64 | struct INFTLPartition *ip; |
65 | size_t retlen; | |
66 | ||
67 | DEBUG(MTD_DEBUG_LEVEL3, "INFTL: find_boot_record(inftl=%p)\n", inftl); | |
68 | ||
69 | /* | |
70 | * Assume logical EraseSize == physical erasesize for starting the | |
71 | * scan. We'll sort it out later if we find a MediaHeader which says | |
72 | * otherwise. | |
73 | */ | |
74 | inftl->EraseSize = inftl->mbd.mtd->erasesize; | |
75 | inftl->nb_blocks = inftl->mbd.mtd->size / inftl->EraseSize; | |
76 | ||
77 | inftl->MediaUnit = BLOCK_NIL; | |
78 | ||
79 | /* Search for a valid boot record */ | |
80 | for (block = 0; block < inftl->nb_blocks; block++) { | |
81 | int ret; | |
82 | ||
83 | /* | |
84 | * Check for BNAND header first. Then whinge if it's found | |
85 | * but later checks fail. | |
86 | */ | |
f4a43cfc TG |
87 | ret = mtd->read(mtd, block * inftl->EraseSize, |
88 | SECTORSIZE, &retlen, buf); | |
1da177e4 LT |
89 | /* We ignore ret in case the ECC of the MediaHeader is invalid |
90 | (which is apparently acceptable) */ | |
91 | if (retlen != SECTORSIZE) { | |
92 | static int warncount = 5; | |
93 | ||
94 | if (warncount) { | |
95 | printk(KERN_WARNING "INFTL: block read at 0x%x " | |
96 | "of mtd%d failed: %d\n", | |
97 | block * inftl->EraseSize, | |
98 | inftl->mbd.mtd->index, ret); | |
99 | if (!--warncount) | |
100 | printk(KERN_WARNING "INFTL: further " | |
101 | "failures for this block will " | |
102 | "not be printed\n"); | |
103 | } | |
104 | continue; | |
105 | } | |
106 | ||
107 | if (retlen < 6 || memcmp(buf, "BNAND", 6)) { | |
108 | /* BNAND\0 not found. Continue */ | |
109 | continue; | |
110 | } | |
111 | ||
112 | /* To be safer with BIOS, also use erase mark as discriminant */ | |
8593fbc6 TG |
113 | if ((ret = inftl_read_oob(mtd, block * inftl->EraseSize + |
114 | SECTORSIZE + 8, 8, &retlen, | |
115 | (char *)&h1) < 0)) { | |
1da177e4 LT |
116 | printk(KERN_WARNING "INFTL: ANAND header found at " |
117 | "0x%x in mtd%d, but OOB data read failed " | |
118 | "(err %d)\n", block * inftl->EraseSize, | |
119 | inftl->mbd.mtd->index, ret); | |
120 | continue; | |
121 | } | |
122 | ||
123 | ||
124 | /* | |
125 | * This is the first we've seen. | |
126 | * Copy the media header structure into place. | |
127 | */ | |
128 | memcpy(mh, buf, sizeof(struct INFTLMediaHeader)); | |
129 | ||
130 | /* Read the spare media header at offset 4096 */ | |
f4a43cfc TG |
131 | mtd->read(mtd, block * inftl->EraseSize + 4096, |
132 | SECTORSIZE, &retlen, buf); | |
1da177e4 LT |
133 | if (retlen != SECTORSIZE) { |
134 | printk(KERN_WARNING "INFTL: Unable to read spare " | |
135 | "Media Header\n"); | |
136 | return -1; | |
137 | } | |
138 | /* Check if this one is the same as the first one we found. */ | |
139 | if (memcmp(mh, buf, sizeof(struct INFTLMediaHeader))) { | |
140 | printk(KERN_WARNING "INFTL: Primary and spare Media " | |
141 | "Headers disagree.\n"); | |
142 | return -1; | |
143 | } | |
144 | ||
145 | mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks); | |
146 | mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions); | |
147 | mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions); | |
148 | mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits); | |
149 | mh->FormatFlags = le32_to_cpu(mh->FormatFlags); | |
150 | mh->PercentUsed = le32_to_cpu(mh->PercentUsed); | |
151 | ||
152 | #ifdef CONFIG_MTD_DEBUG_VERBOSE | |
153 | if (CONFIG_MTD_DEBUG_VERBOSE >= 2) { | |
154 | printk("INFTL: Media Header ->\n" | |
155 | " bootRecordID = %s\n" | |
156 | " NoOfBootImageBlocks = %d\n" | |
157 | " NoOfBinaryPartitions = %d\n" | |
158 | " NoOfBDTLPartitions = %d\n" | |
159 | " BlockMultiplerBits = %d\n" | |
160 | " FormatFlgs = %d\n" | |
161 | " OsakVersion = 0x%x\n" | |
162 | " PercentUsed = %d\n", | |
163 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
164 | mh->NoOfBinaryPartitions, | |
165 | mh->NoOfBDTLPartitions, | |
166 | mh->BlockMultiplierBits, mh->FormatFlags, | |
167 | mh->OsakVersion, mh->PercentUsed); | |
168 | } | |
169 | #endif | |
170 | ||
171 | if (mh->NoOfBDTLPartitions == 0) { | |
172 | printk(KERN_WARNING "INFTL: Media Header sanity check " | |
173 | "failed: NoOfBDTLPartitions (%d) == 0, " | |
174 | "must be at least 1\n", mh->NoOfBDTLPartitions); | |
175 | return -1; | |
176 | } | |
177 | ||
178 | if ((mh->NoOfBDTLPartitions + mh->NoOfBinaryPartitions) > 4) { | |
179 | printk(KERN_WARNING "INFTL: Media Header sanity check " | |
180 | "failed: Total Partitions (%d) > 4, " | |
181 | "BDTL=%d Binary=%d\n", mh->NoOfBDTLPartitions + | |
182 | mh->NoOfBinaryPartitions, | |
183 | mh->NoOfBDTLPartitions, | |
184 | mh->NoOfBinaryPartitions); | |
185 | return -1; | |
186 | } | |
187 | ||
188 | if (mh->BlockMultiplierBits > 1) { | |
189 | printk(KERN_WARNING "INFTL: sorry, we don't support " | |
190 | "UnitSizeFactor 0x%02x\n", | |
191 | mh->BlockMultiplierBits); | |
192 | return -1; | |
193 | } else if (mh->BlockMultiplierBits == 1) { | |
194 | printk(KERN_WARNING "INFTL: support for INFTL with " | |
195 | "UnitSizeFactor 0x%02x is experimental\n", | |
196 | mh->BlockMultiplierBits); | |
197 | inftl->EraseSize = inftl->mbd.mtd->erasesize << | |
198 | mh->BlockMultiplierBits; | |
199 | inftl->nb_blocks = inftl->mbd.mtd->size / inftl->EraseSize; | |
200 | block >>= mh->BlockMultiplierBits; | |
201 | } | |
202 | ||
203 | /* Scan the partitions */ | |
204 | for (i = 0; (i < 4); i++) { | |
205 | ip = &mh->Partitions[i]; | |
206 | ip->virtualUnits = le32_to_cpu(ip->virtualUnits); | |
207 | ip->firstUnit = le32_to_cpu(ip->firstUnit); | |
208 | ip->lastUnit = le32_to_cpu(ip->lastUnit); | |
209 | ip->flags = le32_to_cpu(ip->flags); | |
210 | ip->spareUnits = le32_to_cpu(ip->spareUnits); | |
211 | ip->Reserved0 = le32_to_cpu(ip->Reserved0); | |
212 | ||
213 | #ifdef CONFIG_MTD_DEBUG_VERBOSE | |
214 | if (CONFIG_MTD_DEBUG_VERBOSE >= 2) { | |
215 | printk(" PARTITION[%d] ->\n" | |
216 | " virtualUnits = %d\n" | |
217 | " firstUnit = %d\n" | |
218 | " lastUnit = %d\n" | |
219 | " flags = 0x%x\n" | |
220 | " spareUnits = %d\n", | |
221 | i, ip->virtualUnits, ip->firstUnit, | |
222 | ip->lastUnit, ip->flags, | |
223 | ip->spareUnits); | |
224 | } | |
225 | #endif | |
226 | ||
227 | if (ip->Reserved0 != ip->firstUnit) { | |
228 | struct erase_info *instr = &inftl->instr; | |
229 | ||
230 | instr->mtd = inftl->mbd.mtd; | |
231 | ||
232 | /* | |
233 | * Most likely this is using the | |
234 | * undocumented qiuck mount feature. | |
235 | * We don't support that, we will need | |
236 | * to erase the hidden block for full | |
237 | * compatibility. | |
238 | */ | |
239 | instr->addr = ip->Reserved0 * inftl->EraseSize; | |
240 | instr->len = inftl->EraseSize; | |
f4a43cfc | 241 | mtd->erase(mtd, instr); |
1da177e4 LT |
242 | } |
243 | if ((ip->lastUnit - ip->firstUnit + 1) < ip->virtualUnits) { | |
244 | printk(KERN_WARNING "INFTL: Media Header " | |
245 | "Partition %d sanity check failed\n" | |
246 | " firstUnit %d : lastUnit %d > " | |
247 | "virtualUnits %d\n", i, ip->lastUnit, | |
248 | ip->firstUnit, ip->Reserved0); | |
249 | return -1; | |
250 | } | |
251 | if (ip->Reserved1 != 0) { | |
252 | printk(KERN_WARNING "INFTL: Media Header " | |
253 | "Partition %d sanity check failed: " | |
254 | "Reserved1 %d != 0\n", | |
255 | i, ip->Reserved1); | |
256 | return -1; | |
257 | } | |
258 | ||
259 | if (ip->flags & INFTL_BDTL) | |
260 | break; | |
261 | } | |
262 | ||
263 | if (i >= 4) { | |
264 | printk(KERN_WARNING "INFTL: Media Header Partition " | |
265 | "sanity check failed:\n No partition " | |
266 | "marked as Disk Partition\n"); | |
267 | return -1; | |
268 | } | |
269 | ||
270 | inftl->nb_boot_blocks = ip->firstUnit; | |
271 | inftl->numvunits = ip->virtualUnits; | |
272 | if (inftl->numvunits > (inftl->nb_blocks - | |
273 | inftl->nb_boot_blocks - 2)) { | |
274 | printk(KERN_WARNING "INFTL: Media Header sanity check " | |
275 | "failed:\n numvunits (%d) > nb_blocks " | |
276 | "(%d) - nb_boot_blocks(%d) - 2\n", | |
277 | inftl->numvunits, inftl->nb_blocks, | |
278 | inftl->nb_boot_blocks); | |
279 | return -1; | |
280 | } | |
97894cda | 281 | |
1da177e4 LT |
282 | inftl->mbd.size = inftl->numvunits * |
283 | (inftl->EraseSize / SECTORSIZE); | |
284 | ||
285 | /* | |
286 | * Block count is set to last used EUN (we won't need to keep | |
287 | * any meta-data past that point). | |
288 | */ | |
289 | inftl->firstEUN = ip->firstUnit; | |
290 | inftl->lastEUN = ip->lastUnit; | |
291 | inftl->nb_blocks = ip->lastUnit + 1; | |
292 | ||
293 | /* Memory alloc */ | |
294 | inftl->PUtable = kmalloc(inftl->nb_blocks * sizeof(u16), GFP_KERNEL); | |
295 | if (!inftl->PUtable) { | |
296 | printk(KERN_WARNING "INFTL: allocation of PUtable " | |
297 | "failed (%zd bytes)\n", | |
298 | inftl->nb_blocks * sizeof(u16)); | |
299 | return -ENOMEM; | |
300 | } | |
301 | ||
302 | inftl->VUtable = kmalloc(inftl->nb_blocks * sizeof(u16), GFP_KERNEL); | |
303 | if (!inftl->VUtable) { | |
304 | kfree(inftl->PUtable); | |
305 | printk(KERN_WARNING "INFTL: allocation of VUtable " | |
306 | "failed (%zd bytes)\n", | |
307 | inftl->nb_blocks * sizeof(u16)); | |
308 | return -ENOMEM; | |
309 | } | |
97894cda | 310 | |
1da177e4 LT |
311 | /* Mark the blocks before INFTL MediaHeader as reserved */ |
312 | for (i = 0; i < inftl->nb_boot_blocks; i++) | |
313 | inftl->PUtable[i] = BLOCK_RESERVED; | |
314 | /* Mark all remaining blocks as potentially containing data */ | |
315 | for (; i < inftl->nb_blocks; i++) | |
316 | inftl->PUtable[i] = BLOCK_NOTEXPLORED; | |
317 | ||
318 | /* Mark this boot record (NFTL MediaHeader) block as reserved */ | |
319 | inftl->PUtable[block] = BLOCK_RESERVED; | |
320 | ||
321 | /* Read Bad Erase Unit Table and modify PUtable[] accordingly */ | |
322 | for (i = 0; i < inftl->nb_blocks; i++) { | |
323 | int physblock; | |
324 | /* If any of the physical eraseblocks are bad, don't | |
325 | use the unit. */ | |
326 | for (physblock = 0; physblock < inftl->EraseSize; physblock += inftl->mbd.mtd->erasesize) { | |
327 | if (inftl->mbd.mtd->block_isbad(inftl->mbd.mtd, i * inftl->EraseSize + physblock)) | |
328 | inftl->PUtable[i] = BLOCK_RESERVED; | |
329 | } | |
330 | } | |
331 | ||
332 | inftl->MediaUnit = block; | |
333 | return 0; | |
334 | } | |
335 | ||
336 | /* Not found. */ | |
337 | return -1; | |
338 | } | |
339 | ||
340 | static int memcmpb(void *a, int c, int n) | |
341 | { | |
342 | int i; | |
343 | for (i = 0; i < n; i++) { | |
344 | if (c != ((unsigned char *)a)[i]) | |
345 | return 1; | |
346 | } | |
347 | return 0; | |
348 | } | |
349 | ||
350 | /* | |
351 | * check_free_sector: check if a free sector is actually FREE, | |
352 | * i.e. All 0xff in data and oob area. | |
353 | */ | |
354 | static int check_free_sectors(struct INFTLrecord *inftl, unsigned int address, | |
355 | int len, int check_oob) | |
356 | { | |
357 | u8 buf[SECTORSIZE + inftl->mbd.mtd->oobsize]; | |
9223a456 | 358 | struct mtd_info *mtd = inftl->mbd.mtd; |
1da177e4 LT |
359 | size_t retlen; |
360 | int i; | |
361 | ||
1da177e4 | 362 | for (i = 0; i < len; i += SECTORSIZE) { |
9223a456 | 363 | if (mtd->read(mtd, address, SECTORSIZE, &retlen, buf)) |
1da177e4 LT |
364 | return -1; |
365 | if (memcmpb(buf, 0xff, SECTORSIZE) != 0) | |
366 | return -1; | |
367 | ||
368 | if (check_oob) { | |
8593fbc6 TG |
369 | if(inftl_read_oob(mtd, address, mtd->oobsize, |
370 | &retlen, &buf[SECTORSIZE]) < 0) | |
9223a456 TG |
371 | return -1; |
372 | if (memcmpb(buf + SECTORSIZE, 0xff, mtd->oobsize) != 0) | |
1da177e4 LT |
373 | return -1; |
374 | } | |
375 | address += SECTORSIZE; | |
376 | } | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | /* | |
382 | * INFTL_format: format a Erase Unit by erasing ALL Erase Zones in the Erase | |
383 | * Unit and Update INFTL metadata. Each erase operation is | |
384 | * checked with check_free_sectors. | |
385 | * | |
386 | * Return: 0 when succeed, -1 on error. | |
387 | * | |
97894cda | 388 | * ToDo: 1. Is it neceressary to check_free_sector after erasing ?? |
1da177e4 LT |
389 | */ |
390 | int INFTL_formatblock(struct INFTLrecord *inftl, int block) | |
391 | { | |
392 | size_t retlen; | |
393 | struct inftl_unittail uci; | |
394 | struct erase_info *instr = &inftl->instr; | |
f4a43cfc | 395 | struct mtd_info *mtd = inftl->mbd.mtd; |
1da177e4 LT |
396 | int physblock; |
397 | ||
398 | DEBUG(MTD_DEBUG_LEVEL3, "INFTL: INFTL_formatblock(inftl=%p," | |
399 | "block=%d)\n", inftl, block); | |
400 | ||
401 | memset(instr, 0, sizeof(struct erase_info)); | |
402 | ||
403 | /* FIXME: Shouldn't we be setting the 'discarded' flag to zero | |
404 | _first_? */ | |
405 | ||
406 | /* Use async erase interface, test return code */ | |
407 | instr->mtd = inftl->mbd.mtd; | |
408 | instr->addr = block * inftl->EraseSize; | |
409 | instr->len = inftl->mbd.mtd->erasesize; | |
410 | /* Erase one physical eraseblock at a time, even though the NAND api | |
411 | allows us to group them. This way we if we have a failure, we can | |
412 | mark only the failed block in the bbt. */ | |
f4a43cfc TG |
413 | for (physblock = 0; physblock < inftl->EraseSize; |
414 | physblock += instr->len, instr->addr += instr->len) { | |
415 | mtd->erase(inftl->mbd.mtd, instr); | |
1da177e4 LT |
416 | |
417 | if (instr->state == MTD_ERASE_FAILED) { | |
418 | printk(KERN_WARNING "INFTL: error while formatting block %d\n", | |
419 | block); | |
420 | goto fail; | |
421 | } | |
422 | ||
423 | /* | |
f4a43cfc TG |
424 | * Check the "freeness" of Erase Unit before updating metadata. |
425 | * FixMe: is this check really necessary? Since we have check | |
426 | * the return code after the erase operation. | |
427 | */ | |
1da177e4 LT |
428 | if (check_free_sectors(inftl, instr->addr, instr->len, 1) != 0) |
429 | goto fail; | |
430 | } | |
431 | ||
432 | uci.EraseMark = cpu_to_le16(ERASE_MARK); | |
433 | uci.EraseMark1 = cpu_to_le16(ERASE_MARK); | |
434 | uci.Reserved[0] = 0; | |
435 | uci.Reserved[1] = 0; | |
436 | uci.Reserved[2] = 0; | |
437 | uci.Reserved[3] = 0; | |
438 | instr->addr = block * inftl->EraseSize + SECTORSIZE * 2; | |
8593fbc6 | 439 | if (inftl_write_oob(mtd, instr->addr + 8, 8, &retlen, (char *)&uci) < 0) |
1da177e4 LT |
440 | goto fail; |
441 | return 0; | |
442 | fail: | |
443 | /* could not format, update the bad block table (caller is responsible | |
444 | for setting the PUtable to BLOCK_RESERVED on failure) */ | |
445 | inftl->mbd.mtd->block_markbad(inftl->mbd.mtd, instr->addr); | |
446 | return -1; | |
447 | } | |
448 | ||
449 | /* | |
450 | * format_chain: Format an invalid Virtual Unit chain. It frees all the Erase | |
451 | * Units in a Virtual Unit Chain, i.e. all the units are disconnected. | |
452 | * | |
453 | * Since the chain is invalid then we will have to erase it from its | |
454 | * head (normally for INFTL we go from the oldest). But if it has a | |
455 | * loop then there is no oldest... | |
456 | */ | |
457 | static void format_chain(struct INFTLrecord *inftl, unsigned int first_block) | |
458 | { | |
459 | unsigned int block = first_block, block1; | |
460 | ||
461 | printk(KERN_WARNING "INFTL: formatting chain at block %d\n", | |
462 | first_block); | |
463 | ||
464 | for (;;) { | |
465 | block1 = inftl->PUtable[block]; | |
466 | ||
467 | printk(KERN_WARNING "INFTL: formatting block %d\n", block); | |
468 | if (INFTL_formatblock(inftl, block) < 0) { | |
469 | /* | |
470 | * Cannot format !!!! Mark it as Bad Unit, | |
471 | */ | |
472 | inftl->PUtable[block] = BLOCK_RESERVED; | |
473 | } else { | |
474 | inftl->PUtable[block] = BLOCK_FREE; | |
475 | } | |
476 | ||
477 | /* Goto next block on the chain */ | |
478 | block = block1; | |
479 | ||
480 | if (block == BLOCK_NIL || block >= inftl->lastEUN) | |
481 | break; | |
482 | } | |
483 | } | |
484 | ||
485 | void INFTL_dumptables(struct INFTLrecord *s) | |
486 | { | |
487 | int i; | |
488 | ||
489 | printk("-------------------------------------------" | |
490 | "----------------------------------\n"); | |
491 | ||
492 | printk("VUtable[%d] ->", s->nb_blocks); | |
493 | for (i = 0; i < s->nb_blocks; i++) { | |
494 | if ((i % 8) == 0) | |
495 | printk("\n%04x: ", i); | |
496 | printk("%04x ", s->VUtable[i]); | |
497 | } | |
498 | ||
499 | printk("\n-------------------------------------------" | |
500 | "----------------------------------\n"); | |
501 | ||
502 | printk("PUtable[%d-%d=%d] ->", s->firstEUN, s->lastEUN, s->nb_blocks); | |
503 | for (i = 0; i <= s->lastEUN; i++) { | |
504 | if ((i % 8) == 0) | |
505 | printk("\n%04x: ", i); | |
506 | printk("%04x ", s->PUtable[i]); | |
507 | } | |
508 | ||
509 | printk("\n-------------------------------------------" | |
510 | "----------------------------------\n"); | |
511 | ||
512 | printk("INFTL ->\n" | |
513 | " EraseSize = %d\n" | |
514 | " h/s/c = %d/%d/%d\n" | |
515 | " numvunits = %d\n" | |
516 | " firstEUN = %d\n" | |
517 | " lastEUN = %d\n" | |
518 | " numfreeEUNs = %d\n" | |
519 | " LastFreeEUN = %d\n" | |
520 | " nb_blocks = %d\n" | |
521 | " nb_boot_blocks = %d", | |
522 | s->EraseSize, s->heads, s->sectors, s->cylinders, | |
523 | s->numvunits, s->firstEUN, s->lastEUN, s->numfreeEUNs, | |
524 | s->LastFreeEUN, s->nb_blocks, s->nb_boot_blocks); | |
525 | ||
526 | printk("\n-------------------------------------------" | |
527 | "----------------------------------\n"); | |
528 | } | |
529 | ||
530 | void INFTL_dumpVUchains(struct INFTLrecord *s) | |
531 | { | |
532 | int logical, block, i; | |
533 | ||
534 | printk("-------------------------------------------" | |
535 | "----------------------------------\n"); | |
536 | ||
537 | printk("INFTL Virtual Unit Chains:\n"); | |
538 | for (logical = 0; logical < s->nb_blocks; logical++) { | |
539 | block = s->VUtable[logical]; | |
540 | if (block > s->nb_blocks) | |
541 | continue; | |
542 | printk(" LOGICAL %d --> %d ", logical, block); | |
543 | for (i = 0; i < s->nb_blocks; i++) { | |
544 | if (s->PUtable[block] == BLOCK_NIL) | |
545 | break; | |
546 | block = s->PUtable[block]; | |
547 | printk("%d ", block); | |
548 | } | |
549 | printk("\n"); | |
550 | } | |
551 | ||
552 | printk("-------------------------------------------" | |
553 | "----------------------------------\n"); | |
554 | } | |
555 | ||
556 | int INFTL_mount(struct INFTLrecord *s) | |
557 | { | |
f4a43cfc | 558 | struct mtd_info *mtd = s->mbd.mtd; |
1da177e4 LT |
559 | unsigned int block, first_block, prev_block, last_block; |
560 | unsigned int first_logical_block, logical_block, erase_mark; | |
561 | int chain_length, do_format_chain; | |
562 | struct inftl_unithead1 h0; | |
563 | struct inftl_unittail h1; | |
564 | size_t retlen; | |
565 | int i; | |
566 | u8 *ANACtable, ANAC; | |
567 | ||
568 | DEBUG(MTD_DEBUG_LEVEL3, "INFTL: INFTL_mount(inftl=%p)\n", s); | |
569 | ||
570 | /* Search for INFTL MediaHeader and Spare INFTL Media Header */ | |
571 | if (find_boot_record(s) < 0) { | |
572 | printk(KERN_WARNING "INFTL: could not find valid boot record?\n"); | |
e21f6c02 | 573 | return -ENXIO; |
1da177e4 LT |
574 | } |
575 | ||
576 | /* Init the logical to physical table */ | |
577 | for (i = 0; i < s->nb_blocks; i++) | |
578 | s->VUtable[i] = BLOCK_NIL; | |
579 | ||
580 | logical_block = block = BLOCK_NIL; | |
581 | ||
582 | /* Temporary buffer to store ANAC numbers. */ | |
583 | ANACtable = kmalloc(s->nb_blocks * sizeof(u8), GFP_KERNEL); | |
8766af93 GU |
584 | if (!ANACtable) { |
585 | printk(KERN_WARNING "INFTL: allocation of ANACtable " | |
586 | "failed (%zd bytes)\n", | |
587 | s->nb_blocks * sizeof(u8)); | |
588 | return -ENOMEM; | |
589 | } | |
1da177e4 LT |
590 | memset(ANACtable, 0, s->nb_blocks); |
591 | ||
592 | /* | |
593 | * First pass is to explore each physical unit, and construct the | |
594 | * virtual chains that exist (newest physical unit goes into VUtable). | |
595 | * Any block that is in any way invalid will be left in the | |
596 | * NOTEXPLORED state. Then at the end we will try to format it and | |
597 | * mark it as free. | |
598 | */ | |
599 | DEBUG(MTD_DEBUG_LEVEL3, "INFTL: pass 1, explore each unit\n"); | |
600 | for (first_block = s->firstEUN; first_block <= s->lastEUN; first_block++) { | |
601 | if (s->PUtable[first_block] != BLOCK_NOTEXPLORED) | |
602 | continue; | |
603 | ||
604 | do_format_chain = 0; | |
605 | first_logical_block = BLOCK_NIL; | |
606 | last_block = BLOCK_NIL; | |
607 | block = first_block; | |
608 | ||
609 | for (chain_length = 0; ; chain_length++) { | |
610 | ||
97894cda | 611 | if ((chain_length == 0) && |
1da177e4 LT |
612 | (s->PUtable[block] != BLOCK_NOTEXPLORED)) { |
613 | /* Nothing to do here, onto next block */ | |
614 | break; | |
615 | } | |
616 | ||
8593fbc6 TG |
617 | if (inftl_read_oob(mtd, block * s->EraseSize + 8, |
618 | 8, &retlen, (char *)&h0) < 0 || | |
619 | inftl_read_oob(mtd, block * s->EraseSize + | |
620 | 2 * SECTORSIZE + 8, 8, &retlen, | |
621 | (char *)&h1) < 0) { | |
1da177e4 LT |
622 | /* Should never happen? */ |
623 | do_format_chain++; | |
624 | break; | |
625 | } | |
626 | ||
627 | logical_block = le16_to_cpu(h0.virtualUnitNo); | |
628 | prev_block = le16_to_cpu(h0.prevUnitNo); | |
629 | erase_mark = le16_to_cpu((h1.EraseMark | h1.EraseMark1)); | |
630 | ANACtable[block] = h0.ANAC; | |
631 | ||
632 | /* Previous block is relative to start of Partition */ | |
633 | if (prev_block < s->nb_blocks) | |
634 | prev_block += s->firstEUN; | |
635 | ||
636 | /* Already explored partial chain? */ | |
637 | if (s->PUtable[block] != BLOCK_NOTEXPLORED) { | |
638 | /* Check if chain for this logical */ | |
639 | if (logical_block == first_logical_block) { | |
640 | if (last_block != BLOCK_NIL) | |
641 | s->PUtable[last_block] = block; | |
642 | } | |
643 | break; | |
644 | } | |
645 | ||
646 | /* Check for invalid block */ | |
647 | if (erase_mark != ERASE_MARK) { | |
648 | printk(KERN_WARNING "INFTL: corrupt block %d " | |
649 | "in chain %d, chain length %d, erase " | |
650 | "mark 0x%x?\n", block, first_block, | |
651 | chain_length, erase_mark); | |
652 | /* | |
653 | * Assume end of chain, probably incomplete | |
654 | * fold/erase... | |
655 | */ | |
656 | if (chain_length == 0) | |
657 | do_format_chain++; | |
658 | break; | |
659 | } | |
660 | ||
661 | /* Check for it being free already then... */ | |
662 | if ((logical_block == BLOCK_FREE) || | |
663 | (logical_block == BLOCK_NIL)) { | |
664 | s->PUtable[block] = BLOCK_FREE; | |
665 | break; | |
666 | } | |
667 | ||
668 | /* Sanity checks on block numbers */ | |
669 | if ((logical_block >= s->nb_blocks) || | |
670 | ((prev_block >= s->nb_blocks) && | |
671 | (prev_block != BLOCK_NIL))) { | |
672 | if (chain_length > 0) { | |
673 | printk(KERN_WARNING "INFTL: corrupt " | |
674 | "block %d in chain %d?\n", | |
675 | block, first_block); | |
676 | do_format_chain++; | |
677 | } | |
678 | break; | |
679 | } | |
680 | ||
681 | if (first_logical_block == BLOCK_NIL) { | |
682 | first_logical_block = logical_block; | |
683 | } else { | |
684 | if (first_logical_block != logical_block) { | |
685 | /* Normal for folded chain... */ | |
686 | break; | |
687 | } | |
688 | } | |
689 | ||
690 | /* | |
691 | * Current block is valid, so if we followed a virtual | |
692 | * chain to get here then we can set the previous | |
693 | * block pointer in our PUtable now. Then move onto | |
694 | * the previous block in the chain. | |
695 | */ | |
696 | s->PUtable[block] = BLOCK_NIL; | |
697 | if (last_block != BLOCK_NIL) | |
698 | s->PUtable[last_block] = block; | |
699 | last_block = block; | |
700 | block = prev_block; | |
701 | ||
702 | /* Check for end of chain */ | |
703 | if (block == BLOCK_NIL) | |
704 | break; | |
705 | ||
706 | /* Validate next block before following it... */ | |
707 | if (block > s->lastEUN) { | |
708 | printk(KERN_WARNING "INFTL: invalid previous " | |
709 | "block %d in chain %d?\n", block, | |
710 | first_block); | |
711 | do_format_chain++; | |
712 | break; | |
713 | } | |
714 | } | |
715 | ||
716 | if (do_format_chain) { | |
717 | format_chain(s, first_block); | |
718 | continue; | |
719 | } | |
720 | ||
721 | /* | |
722 | * Looks like a valid chain then. It may not really be the | |
723 | * newest block in the chain, but it is the newest we have | |
724 | * found so far. We might update it in later iterations of | |
725 | * this loop if we find something newer. | |
726 | */ | |
727 | s->VUtable[first_logical_block] = first_block; | |
728 | logical_block = BLOCK_NIL; | |
729 | } | |
730 | ||
731 | #ifdef CONFIG_MTD_DEBUG_VERBOSE | |
732 | if (CONFIG_MTD_DEBUG_VERBOSE >= 2) | |
733 | INFTL_dumptables(s); | |
734 | #endif | |
735 | ||
736 | /* | |
737 | * Second pass, check for infinite loops in chains. These are | |
738 | * possible because we don't update the previous pointers when | |
739 | * we fold chains. No big deal, just fix them up in PUtable. | |
740 | */ | |
741 | DEBUG(MTD_DEBUG_LEVEL3, "INFTL: pass 2, validate virtual chains\n"); | |
742 | for (logical_block = 0; logical_block < s->numvunits; logical_block++) { | |
743 | block = s->VUtable[logical_block]; | |
744 | last_block = BLOCK_NIL; | |
745 | ||
746 | /* Check for free/reserved/nil */ | |
747 | if (block >= BLOCK_RESERVED) | |
748 | continue; | |
749 | ||
750 | ANAC = ANACtable[block]; | |
751 | for (i = 0; i < s->numvunits; i++) { | |
752 | if (s->PUtable[block] == BLOCK_NIL) | |
753 | break; | |
754 | if (s->PUtable[block] > s->lastEUN) { | |
755 | printk(KERN_WARNING "INFTL: invalid prev %d, " | |
756 | "in virtual chain %d\n", | |
757 | s->PUtable[block], logical_block); | |
758 | s->PUtable[block] = BLOCK_NIL; | |
97894cda | 759 | |
1da177e4 LT |
760 | } |
761 | if (ANACtable[block] != ANAC) { | |
762 | /* | |
763 | * Chain must point back to itself. This is ok, | |
764 | * but we will need adjust the tables with this | |
765 | * newest block and oldest block. | |
766 | */ | |
767 | s->VUtable[logical_block] = block; | |
768 | s->PUtable[last_block] = BLOCK_NIL; | |
769 | break; | |
770 | } | |
771 | ||
772 | ANAC--; | |
773 | last_block = block; | |
774 | block = s->PUtable[block]; | |
775 | } | |
776 | ||
777 | if (i >= s->nb_blocks) { | |
778 | /* | |
779 | * Uhoo, infinite chain with valid ANACS! | |
780 | * Format whole chain... | |
781 | */ | |
782 | format_chain(s, first_block); | |
783 | } | |
784 | } | |
785 | ||
786 | #ifdef CONFIG_MTD_DEBUG_VERBOSE | |
787 | if (CONFIG_MTD_DEBUG_VERBOSE >= 2) | |
788 | INFTL_dumptables(s); | |
789 | if (CONFIG_MTD_DEBUG_VERBOSE >= 2) | |
790 | INFTL_dumpVUchains(s); | |
791 | #endif | |
792 | ||
793 | /* | |
794 | * Third pass, format unreferenced blocks and init free block count. | |
795 | */ | |
796 | s->numfreeEUNs = 0; | |
797 | s->LastFreeEUN = BLOCK_NIL; | |
798 | ||
799 | DEBUG(MTD_DEBUG_LEVEL3, "INFTL: pass 3, format unused blocks\n"); | |
800 | for (block = s->firstEUN; block <= s->lastEUN; block++) { | |
801 | if (s->PUtable[block] == BLOCK_NOTEXPLORED) { | |
802 | printk("INFTL: unreferenced block %d, formatting it\n", | |
803 | block); | |
804 | if (INFTL_formatblock(s, block) < 0) | |
805 | s->PUtable[block] = BLOCK_RESERVED; | |
806 | else | |
807 | s->PUtable[block] = BLOCK_FREE; | |
808 | } | |
809 | if (s->PUtable[block] == BLOCK_FREE) { | |
810 | s->numfreeEUNs++; | |
811 | if (s->LastFreeEUN == BLOCK_NIL) | |
812 | s->LastFreeEUN = block; | |
813 | } | |
814 | } | |
815 | ||
816 | kfree(ANACtable); | |
817 | return 0; | |
818 | } |