Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * JFFS2 -- Journalling Flash File System, Version 2. |
| 3 | * |
| 4 | * Copyright (C) 2001-2003 Red Hat, Inc. |
| 5 | * Copyright (C) 2004 Thomas Gleixner <tglx@linutronix.de> |
| 6 | * |
| 7 | * Created by David Woodhouse <dwmw2@infradead.org> |
| 8 | * Modified debugged and enhanced by Thomas Gleixner <tglx@linutronix.de> |
| 9 | * |
| 10 | * For licensing information, see the file 'LICENCE' in this directory. |
| 11 | * |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 12 | * $Id: wbuf.c,v 1.100 2005/09/30 13:59:13 dedekind Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/mtd/mtd.h> |
| 19 | #include <linux/crc32.h> |
| 20 | #include <linux/mtd/nand.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 21 | #include <linux/jiffies.h> |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "nodelist.h" |
| 24 | |
| 25 | /* For testing write failures */ |
| 26 | #undef BREAKME |
| 27 | #undef BREAKMEHEADER |
| 28 | |
| 29 | #ifdef BREAKME |
| 30 | static unsigned char *brokenbuf; |
| 31 | #endif |
| 32 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 33 | #define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) ) |
| 34 | #define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) ) |
| 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | /* max. erase failures before we mark a block bad */ |
| 37 | #define MAX_ERASE_FAILURES 2 |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | struct jffs2_inodirty { |
| 40 | uint32_t ino; |
| 41 | struct jffs2_inodirty *next; |
| 42 | }; |
| 43 | |
| 44 | static struct jffs2_inodirty inodirty_nomem; |
| 45 | |
| 46 | static int jffs2_wbuf_pending_for_ino(struct jffs2_sb_info *c, uint32_t ino) |
| 47 | { |
| 48 | struct jffs2_inodirty *this = c->wbuf_inodes; |
| 49 | |
| 50 | /* If a malloc failed, consider _everything_ dirty */ |
| 51 | if (this == &inodirty_nomem) |
| 52 | return 1; |
| 53 | |
| 54 | /* If ino == 0, _any_ non-GC writes mean 'yes' */ |
| 55 | if (this && !ino) |
| 56 | return 1; |
| 57 | |
| 58 | /* Look to see if the inode in question is pending in the wbuf */ |
| 59 | while (this) { |
| 60 | if (this->ino == ino) |
| 61 | return 1; |
| 62 | this = this->next; |
| 63 | } |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | static void jffs2_clear_wbuf_ino_list(struct jffs2_sb_info *c) |
| 68 | { |
| 69 | struct jffs2_inodirty *this; |
| 70 | |
| 71 | this = c->wbuf_inodes; |
| 72 | |
| 73 | if (this != &inodirty_nomem) { |
| 74 | while (this) { |
| 75 | struct jffs2_inodirty *next = this->next; |
| 76 | kfree(this); |
| 77 | this = next; |
| 78 | } |
| 79 | } |
| 80 | c->wbuf_inodes = NULL; |
| 81 | } |
| 82 | |
| 83 | static void jffs2_wbuf_dirties_inode(struct jffs2_sb_info *c, uint32_t ino) |
| 84 | { |
| 85 | struct jffs2_inodirty *new; |
| 86 | |
| 87 | /* Mark the superblock dirty so that kupdated will flush... */ |
Artem B. Bityuckiy | 4d95270 | 2005-03-18 09:58:09 +0000 | [diff] [blame] | 88 | jffs2_erase_pending_trigger(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | if (jffs2_wbuf_pending_for_ino(c, ino)) |
| 91 | return; |
| 92 | |
| 93 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
| 94 | if (!new) { |
| 95 | D1(printk(KERN_DEBUG "No memory to allocate inodirty. Fallback to all considered dirty\n")); |
| 96 | jffs2_clear_wbuf_ino_list(c); |
| 97 | c->wbuf_inodes = &inodirty_nomem; |
| 98 | return; |
| 99 | } |
| 100 | new->ino = ino; |
| 101 | new->next = c->wbuf_inodes; |
| 102 | c->wbuf_inodes = new; |
| 103 | return; |
| 104 | } |
| 105 | |
| 106 | static inline void jffs2_refile_wbuf_blocks(struct jffs2_sb_info *c) |
| 107 | { |
| 108 | struct list_head *this, *next; |
| 109 | static int n; |
| 110 | |
| 111 | if (list_empty(&c->erasable_pending_wbuf_list)) |
| 112 | return; |
| 113 | |
| 114 | list_for_each_safe(this, next, &c->erasable_pending_wbuf_list) { |
| 115 | struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list); |
| 116 | |
| 117 | D1(printk(KERN_DEBUG "Removing eraseblock at 0x%08x from erasable_pending_wbuf_list...\n", jeb->offset)); |
| 118 | list_del(this); |
| 119 | if ((jiffies + (n++)) & 127) { |
| 120 | /* Most of the time, we just erase it immediately. Otherwise we |
| 121 | spend ages scanning it on mount, etc. */ |
| 122 | D1(printk(KERN_DEBUG "...and adding to erase_pending_list\n")); |
| 123 | list_add_tail(&jeb->list, &c->erase_pending_list); |
| 124 | c->nr_erasing_blocks++; |
| 125 | jffs2_erase_pending_trigger(c); |
| 126 | } else { |
| 127 | /* Sometimes, however, we leave it elsewhere so it doesn't get |
| 128 | immediately reused, and we spread the load a bit. */ |
| 129 | D1(printk(KERN_DEBUG "...and adding to erasable_list\n")); |
| 130 | list_add_tail(&jeb->list, &c->erasable_list); |
| 131 | } |
| 132 | } |
| 133 | } |
| 134 | |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 135 | #define REFILE_NOTEMPTY 0 |
| 136 | #define REFILE_ANYWAY 1 |
| 137 | |
| 138 | static void jffs2_block_refile(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int allow_empty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | { |
| 140 | D1(printk("About to refile bad block at %08x\n", jeb->offset)); |
| 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | /* File the existing block on the bad_used_list.... */ |
| 143 | if (c->nextblock == jeb) |
| 144 | c->nextblock = NULL; |
| 145 | else /* Not sure this should ever happen... need more coffee */ |
| 146 | list_del(&jeb->list); |
| 147 | if (jeb->first_node) { |
| 148 | D1(printk("Refiling block at %08x to bad_used_list\n", jeb->offset)); |
| 149 | list_add(&jeb->list, &c->bad_used_list); |
| 150 | } else { |
Estelle Hammache | 9b88f47 | 2005-01-28 18:53:05 +0000 | [diff] [blame] | 151 | BUG_ON(allow_empty == REFILE_NOTEMPTY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | /* It has to have had some nodes or we couldn't be here */ |
| 153 | D1(printk("Refiling block at %08x to erase_pending_list\n", jeb->offset)); |
| 154 | list_add(&jeb->list, &c->erase_pending_list); |
| 155 | c->nr_erasing_blocks++; |
| 156 | jffs2_erase_pending_trigger(c); |
| 157 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | /* Adjust its size counts accordingly */ |
| 160 | c->wasted_size += jeb->free_size; |
| 161 | c->free_size -= jeb->free_size; |
| 162 | jeb->wasted_size += jeb->free_size; |
| 163 | jeb->free_size = 0; |
| 164 | |
Artem B. Bityutskiy | e0c8e42 | 2005-07-24 16:14:17 +0100 | [diff] [blame] | 165 | jffs2_dbg_dump_block_lists_nolock(c); |
| 166 | jffs2_dbg_acct_sanity_check_nolock(c,jeb); |
| 167 | jffs2_dbg_acct_paranoia_check_nolock(c, jeb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | /* Recover from failure to write wbuf. Recover the nodes up to the |
| 171 | * wbuf, not the one which we were starting to try to write. */ |
| 172 | |
| 173 | static void jffs2_wbuf_recover(struct jffs2_sb_info *c) |
| 174 | { |
| 175 | struct jffs2_eraseblock *jeb, *new_jeb; |
| 176 | struct jffs2_raw_node_ref **first_raw, **raw; |
| 177 | size_t retlen; |
| 178 | int ret; |
| 179 | unsigned char *buf; |
| 180 | uint32_t start, end, ofs, len; |
| 181 | |
David Woodhouse | 2f78540 | 2006-05-24 02:04:45 +0100 | [diff] [blame] | 182 | if (jffs2_prealloc_raw_node_refs(c, c->reserved_refs + 1)) |
| 183 | return; |
| 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | spin_lock(&c->erase_completion_lock); |
| 186 | |
| 187 | jeb = &c->blocks[c->wbuf_ofs / c->sector_size]; |
| 188 | |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 189 | jffs2_block_refile(c, jeb, REFILE_NOTEMPTY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
| 191 | /* Find the first node to be recovered, by skipping over every |
| 192 | node which ends before the wbuf starts, or which is obsolete. */ |
| 193 | first_raw = &jeb->first_node; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 194 | while (*first_raw && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | (ref_obsolete(*first_raw) || |
| 196 | (ref_offset(*first_raw)+ref_totlen(c, jeb, *first_raw)) < c->wbuf_ofs)) { |
| 197 | D1(printk(KERN_DEBUG "Skipping node at 0x%08x(%d)-0x%08x which is either before 0x%08x or obsolete\n", |
| 198 | ref_offset(*first_raw), ref_flags(*first_raw), |
| 199 | (ref_offset(*first_raw) + ref_totlen(c, jeb, *first_raw)), |
| 200 | c->wbuf_ofs)); |
| 201 | first_raw = &(*first_raw)->next_phys; |
| 202 | } |
| 203 | |
| 204 | if (!*first_raw) { |
| 205 | /* All nodes were obsolete. Nothing to recover. */ |
| 206 | D1(printk(KERN_DEBUG "No non-obsolete nodes to be recovered. Just filing block bad\n")); |
| 207 | spin_unlock(&c->erase_completion_lock); |
| 208 | return; |
| 209 | } |
| 210 | |
| 211 | start = ref_offset(*first_raw); |
| 212 | end = ref_offset(*first_raw) + ref_totlen(c, jeb, *first_raw); |
| 213 | |
| 214 | /* Find the last node to be recovered */ |
| 215 | raw = first_raw; |
| 216 | while ((*raw)) { |
| 217 | if (!ref_obsolete(*raw)) |
| 218 | end = ref_offset(*raw) + ref_totlen(c, jeb, *raw); |
| 219 | |
| 220 | raw = &(*raw)->next_phys; |
| 221 | } |
| 222 | spin_unlock(&c->erase_completion_lock); |
| 223 | |
| 224 | D1(printk(KERN_DEBUG "wbuf recover %08x-%08x\n", start, end)); |
| 225 | |
| 226 | buf = NULL; |
| 227 | if (start < c->wbuf_ofs) { |
| 228 | /* First affected node was already partially written. |
| 229 | * Attempt to reread the old data into our buffer. */ |
| 230 | |
| 231 | buf = kmalloc(end - start, GFP_KERNEL); |
| 232 | if (!buf) { |
| 233 | printk(KERN_CRIT "Malloc failure in wbuf recovery. Data loss ensues.\n"); |
| 234 | |
| 235 | goto read_failed; |
| 236 | } |
| 237 | |
| 238 | /* Do the read... */ |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 239 | ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if (ret == -EBADMSG && retlen == c->wbuf_ofs - start) { |
| 242 | /* ECC recovered */ |
| 243 | ret = 0; |
| 244 | } |
| 245 | if (ret || retlen != c->wbuf_ofs - start) { |
| 246 | printk(KERN_CRIT "Old data are already lost in wbuf recovery. Data loss ensues.\n"); |
| 247 | |
| 248 | kfree(buf); |
| 249 | buf = NULL; |
| 250 | read_failed: |
| 251 | first_raw = &(*first_raw)->next_phys; |
| 252 | /* If this was the only node to be recovered, give up */ |
| 253 | if (!(*first_raw)) |
| 254 | return; |
| 255 | |
| 256 | /* It wasn't. Go on and try to recover nodes complete in the wbuf */ |
| 257 | start = ref_offset(*first_raw); |
| 258 | } else { |
| 259 | /* Read succeeded. Copy the remaining data from the wbuf */ |
| 260 | memcpy(buf + (c->wbuf_ofs - start), c->wbuf, end - c->wbuf_ofs); |
| 261 | } |
| 262 | } |
| 263 | /* OK... we're to rewrite (end-start) bytes of data from first_raw onwards. |
| 264 | Either 'buf' contains the data, or we find it in the wbuf */ |
| 265 | |
| 266 | |
| 267 | /* ... and get an allocation of space from a shiny new block instead */ |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 268 | ret = jffs2_reserve_space_gc(c, end-start, &len, JFFS2_SUMMARY_NOSUM_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | if (ret) { |
| 270 | printk(KERN_WARNING "Failed to allocate space for wbuf recovery. Data loss ensues.\n"); |
Estelle Hammache | 9b88f47 | 2005-01-28 18:53:05 +0000 | [diff] [blame] | 271 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | return; |
| 273 | } |
David Woodhouse | 9fe4854 | 2006-05-23 00:38:06 +0100 | [diff] [blame] | 274 | ofs = write_ofs(c); |
| 275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | if (end-start >= c->wbuf_pagesize) { |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 277 | /* Need to do another write immediately, but it's possible |
Estelle Hammache | 9b88f47 | 2005-01-28 18:53:05 +0000 | [diff] [blame] | 278 | that this is just because the wbuf itself is completely |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 279 | full, and there's nothing earlier read back from the |
| 280 | flash. Hence 'buf' isn't necessarily what we're writing |
Estelle Hammache | 9b88f47 | 2005-01-28 18:53:05 +0000 | [diff] [blame] | 281 | from. */ |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 282 | unsigned char *rewrite_buf = buf?:c->wbuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | uint32_t towrite = (end-start) - ((end-start)%c->wbuf_pagesize); |
| 284 | |
| 285 | D1(printk(KERN_DEBUG "Write 0x%x bytes at 0x%08x in wbuf recover\n", |
| 286 | towrite, ofs)); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | #ifdef BREAKMEHEADER |
| 289 | static int breakme; |
| 290 | if (breakme++ == 20) { |
| 291 | printk(KERN_NOTICE "Faking write error at 0x%08x\n", ofs); |
| 292 | breakme = 0; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 293 | c->mtd->write(c->mtd, ofs, towrite, &retlen, |
| 294 | brokenbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | ret = -EIO; |
| 296 | } else |
| 297 | #endif |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 298 | ret = c->mtd->write(c->mtd, ofs, towrite, &retlen, |
| 299 | rewrite_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | if (ret || retlen != towrite) { |
| 302 | /* Argh. We tried. Really we did. */ |
| 303 | printk(KERN_CRIT "Recovery of wbuf failed due to a second write error\n"); |
Estelle Hammache | 9b88f47 | 2005-01-28 18:53:05 +0000 | [diff] [blame] | 304 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
David Woodhouse | 2f78540 | 2006-05-24 02:04:45 +0100 | [diff] [blame] | 306 | if (retlen) |
| 307 | jffs2_add_physical_node_ref(c, ofs | REF_OBSOLETE, ref_totlen(c, jeb, *first_raw), NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | return; |
| 310 | } |
| 311 | printk(KERN_NOTICE "Recovery of wbuf succeeded to %08x\n", ofs); |
| 312 | |
| 313 | c->wbuf_len = (end - start) - towrite; |
| 314 | c->wbuf_ofs = ofs + towrite; |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 315 | memmove(c->wbuf, rewrite_buf + towrite, c->wbuf_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | /* Don't muck about with c->wbuf_inodes. False positives are harmless. */ |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 317 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } else { |
| 319 | /* OK, now we're left with the dregs in whichever buffer we're using */ |
| 320 | if (buf) { |
| 321 | memcpy(c->wbuf, buf, end-start); |
| 322 | kfree(buf); |
| 323 | } else { |
| 324 | memmove(c->wbuf, c->wbuf + (start - c->wbuf_ofs), end - start); |
| 325 | } |
| 326 | c->wbuf_ofs = ofs; |
| 327 | c->wbuf_len = end - start; |
| 328 | } |
| 329 | |
| 330 | /* Now sort out the jffs2_raw_node_refs, moving them from the old to the next block */ |
| 331 | new_jeb = &c->blocks[ofs / c->sector_size]; |
| 332 | |
| 333 | spin_lock(&c->erase_completion_lock); |
| 334 | if (new_jeb->first_node) { |
| 335 | /* Odd, but possible with ST flash later maybe */ |
| 336 | new_jeb->last_node->next_phys = *first_raw; |
| 337 | } else { |
| 338 | new_jeb->first_node = *first_raw; |
| 339 | } |
| 340 | |
| 341 | raw = first_raw; |
| 342 | while (*raw) { |
| 343 | uint32_t rawlen = ref_totlen(c, jeb, *raw); |
| 344 | |
| 345 | D1(printk(KERN_DEBUG "Refiling block of %08x at %08x(%d) to %08x\n", |
| 346 | rawlen, ref_offset(*raw), ref_flags(*raw), ofs)); |
| 347 | |
| 348 | if (ref_obsolete(*raw)) { |
| 349 | /* Shouldn't really happen much */ |
| 350 | new_jeb->dirty_size += rawlen; |
| 351 | new_jeb->free_size -= rawlen; |
| 352 | c->dirty_size += rawlen; |
| 353 | } else { |
| 354 | new_jeb->used_size += rawlen; |
| 355 | new_jeb->free_size -= rawlen; |
| 356 | jeb->dirty_size += rawlen; |
| 357 | jeb->used_size -= rawlen; |
| 358 | c->dirty_size += rawlen; |
| 359 | } |
| 360 | c->free_size -= rawlen; |
| 361 | (*raw)->flash_offset = ofs | ref_flags(*raw); |
| 362 | ofs += rawlen; |
| 363 | new_jeb->last_node = *raw; |
| 364 | |
| 365 | raw = &(*raw)->next_phys; |
| 366 | } |
| 367 | |
| 368 | /* Fix up the original jeb now it's on the bad_list */ |
| 369 | *first_raw = NULL; |
| 370 | if (first_raw == &jeb->first_node) { |
| 371 | jeb->last_node = NULL; |
| 372 | D1(printk(KERN_DEBUG "Failing block at %08x is now empty. Moving to erase_pending_list\n", jeb->offset)); |
| 373 | list_del(&jeb->list); |
| 374 | list_add(&jeb->list, &c->erase_pending_list); |
| 375 | c->nr_erasing_blocks++; |
| 376 | jffs2_erase_pending_trigger(c); |
| 377 | } |
| 378 | else |
| 379 | jeb->last_node = container_of(first_raw, struct jffs2_raw_node_ref, next_phys); |
| 380 | |
Artem B. Bityutskiy | e0c8e42 | 2005-07-24 16:14:17 +0100 | [diff] [blame] | 381 | jffs2_dbg_acct_sanity_check_nolock(c, jeb); |
| 382 | jffs2_dbg_acct_paranoia_check_nolock(c, jeb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
Artem B. Bityutskiy | e0c8e42 | 2005-07-24 16:14:17 +0100 | [diff] [blame] | 384 | jffs2_dbg_acct_sanity_check_nolock(c, new_jeb); |
| 385 | jffs2_dbg_acct_paranoia_check_nolock(c, new_jeb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | spin_unlock(&c->erase_completion_lock); |
| 388 | |
| 389 | D1(printk(KERN_DEBUG "wbuf recovery completed OK\n")); |
| 390 | } |
| 391 | |
| 392 | /* Meaning of pad argument: |
| 393 | 0: Do not pad. Probably pointless - we only ever use this when we can't pad anyway. |
| 394 | 1: Pad, do not adjust nextblock free_size |
| 395 | 2: Pad, adjust nextblock free_size |
| 396 | */ |
| 397 | #define NOPAD 0 |
| 398 | #define PAD_NOACCOUNT 1 |
| 399 | #define PAD_ACCOUNTING 2 |
| 400 | |
| 401 | static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad) |
| 402 | { |
| 403 | int ret; |
| 404 | size_t retlen; |
| 405 | |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 406 | /* Nothing to do if not write-buffering the flash. In particular, we shouldn't |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | del_timer() the timer we never initialised. */ |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 408 | if (!jffs2_is_writebuffered(c)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | return 0; |
| 410 | |
| 411 | if (!down_trylock(&c->alloc_sem)) { |
| 412 | up(&c->alloc_sem); |
| 413 | printk(KERN_CRIT "jffs2_flush_wbuf() called with alloc_sem not locked!\n"); |
| 414 | BUG(); |
| 415 | } |
| 416 | |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 417 | if (!c->wbuf_len) /* already checked c->wbuf above */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return 0; |
| 419 | |
David Woodhouse | 2f78540 | 2006-05-24 02:04:45 +0100 | [diff] [blame] | 420 | if (jffs2_prealloc_raw_node_refs(c, c->reserved_refs + 1)) |
| 421 | return -ENOMEM; |
| 422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | /* claim remaining space on the page |
| 424 | this happens, if we have a change to a new block, |
| 425 | or if fsync forces us to flush the writebuffer. |
| 426 | if we have a switch to next page, we will not have |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 427 | enough remaining space for this. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | */ |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 429 | if (pad ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | c->wbuf_len = PAD(c->wbuf_len); |
| 431 | |
| 432 | /* Pad with JFFS2_DIRTY_BITMASK initially. this helps out ECC'd NOR |
| 433 | with 8 byte page size */ |
| 434 | memset(c->wbuf + c->wbuf_len, 0, c->wbuf_pagesize - c->wbuf_len); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | if ( c->wbuf_len + sizeof(struct jffs2_unknown_node) < c->wbuf_pagesize) { |
| 437 | struct jffs2_unknown_node *padnode = (void *)(c->wbuf + c->wbuf_len); |
| 438 | padnode->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
| 439 | padnode->nodetype = cpu_to_je16(JFFS2_NODETYPE_PADDING); |
| 440 | padnode->totlen = cpu_to_je32(c->wbuf_pagesize - c->wbuf_len); |
| 441 | padnode->hdr_crc = cpu_to_je32(crc32(0, padnode, sizeof(*padnode)-4)); |
| 442 | } |
| 443 | } |
| 444 | /* else jffs2_flash_writev has actually filled in the rest of the |
| 445 | buffer for us, and will deal with the node refs etc. later. */ |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | #ifdef BREAKME |
| 448 | static int breakme; |
| 449 | if (breakme++ == 20) { |
| 450 | printk(KERN_NOTICE "Faking write error at 0x%08x\n", c->wbuf_ofs); |
| 451 | breakme = 0; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 452 | c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, |
| 453 | brokenbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | ret = -EIO; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 455 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | #endif |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | ret = c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf); |
| 459 | |
| 460 | if (ret || retlen != c->wbuf_pagesize) { |
| 461 | if (ret) |
| 462 | printk(KERN_WARNING "jffs2_flush_wbuf(): Write failed with %d\n",ret); |
| 463 | else { |
| 464 | printk(KERN_WARNING "jffs2_flush_wbuf(): Write was short: %zd instead of %d\n", |
| 465 | retlen, c->wbuf_pagesize); |
| 466 | ret = -EIO; |
| 467 | } |
| 468 | |
| 469 | jffs2_wbuf_recover(c); |
| 470 | |
| 471 | return ret; |
| 472 | } |
| 473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | /* Adjust free size of the block if we padded. */ |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 475 | if (pad) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | struct jffs2_eraseblock *jeb; |
David Woodhouse | 0bcc099 | 2006-05-21 13:00:54 +0100 | [diff] [blame] | 477 | uint32_t waste = c->wbuf_pagesize - c->wbuf_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
| 479 | jeb = &c->blocks[c->wbuf_ofs / c->sector_size]; |
| 480 | |
| 481 | D1(printk(KERN_DEBUG "jffs2_flush_wbuf() adjusting free_size of %sblock at %08x\n", |
| 482 | (jeb==c->nextblock)?"next":"", jeb->offset)); |
| 483 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 484 | /* wbuf_pagesize - wbuf_len is the amount of space that's to be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | padded. If there is less free space in the block than that, |
| 486 | something screwed up */ |
David Woodhouse | 0bcc099 | 2006-05-21 13:00:54 +0100 | [diff] [blame] | 487 | if (jeb->free_size < waste) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | printk(KERN_CRIT "jffs2_flush_wbuf(): Accounting error. wbuf at 0x%08x has 0x%03x bytes, 0x%03x left.\n", |
David Woodhouse | 0bcc099 | 2006-05-21 13:00:54 +0100 | [diff] [blame] | 489 | c->wbuf_ofs, c->wbuf_len, waste); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | printk(KERN_CRIT "jffs2_flush_wbuf(): But free_size for block at 0x%08x is only 0x%08x\n", |
| 491 | jeb->offset, jeb->free_size); |
| 492 | BUG(); |
| 493 | } |
David Woodhouse | 0bcc099 | 2006-05-21 13:00:54 +0100 | [diff] [blame] | 494 | |
| 495 | spin_lock(&c->erase_completion_lock); |
| 496 | |
David Woodhouse | 2f78540 | 2006-05-24 02:04:45 +0100 | [diff] [blame] | 497 | jffs2_link_node_ref(c, jeb, (c->wbuf_ofs + c->wbuf_len) | REF_OBSOLETE, waste, NULL); |
David Woodhouse | 0bcc099 | 2006-05-21 13:00:54 +0100 | [diff] [blame] | 498 | /* FIXME: that made it count as dirty. Convert to wasted */ |
| 499 | jeb->dirty_size -= waste; |
| 500 | c->dirty_size -= waste; |
| 501 | jeb->wasted_size += waste; |
| 502 | c->wasted_size += waste; |
| 503 | } else |
| 504 | spin_lock(&c->erase_completion_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | /* Stick any now-obsoleted blocks on the erase_pending_list */ |
| 507 | jffs2_refile_wbuf_blocks(c); |
| 508 | jffs2_clear_wbuf_ino_list(c); |
| 509 | spin_unlock(&c->erase_completion_lock); |
| 510 | |
| 511 | memset(c->wbuf,0xff,c->wbuf_pagesize); |
| 512 | /* adjust write buffer offset, else we get a non contiguous write bug */ |
| 513 | c->wbuf_ofs += c->wbuf_pagesize; |
| 514 | c->wbuf_len = 0; |
| 515 | return 0; |
| 516 | } |
| 517 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 518 | /* Trigger garbage collection to flush the write-buffer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | If ino arg is zero, do it if _any_ real (i.e. not GC) writes are |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 520 | outstanding. If ino arg non-zero, do it only if a write for the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | given inode is outstanding. */ |
| 522 | int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino) |
| 523 | { |
| 524 | uint32_t old_wbuf_ofs; |
| 525 | uint32_t old_wbuf_len; |
| 526 | int ret = 0; |
| 527 | |
| 528 | D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() called for ino #%u...\n", ino)); |
| 529 | |
David Woodhouse | 8aee6ac | 2005-02-02 22:12:08 +0000 | [diff] [blame] | 530 | if (!c->wbuf) |
| 531 | return 0; |
| 532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | down(&c->alloc_sem); |
| 534 | if (!jffs2_wbuf_pending_for_ino(c, ino)) { |
| 535 | D1(printk(KERN_DEBUG "Ino #%d not pending in wbuf. Returning\n", ino)); |
| 536 | up(&c->alloc_sem); |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | old_wbuf_ofs = c->wbuf_ofs; |
| 541 | old_wbuf_len = c->wbuf_len; |
| 542 | |
| 543 | if (c->unchecked_size) { |
| 544 | /* GC won't make any progress for a while */ |
| 545 | D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() padding. Not finished checking\n")); |
| 546 | down_write(&c->wbuf_sem); |
| 547 | ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 548 | /* retry flushing wbuf in case jffs2_wbuf_recover |
| 549 | left some data in the wbuf */ |
| 550 | if (ret) |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 551 | ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | up_write(&c->wbuf_sem); |
| 553 | } else while (old_wbuf_len && |
| 554 | old_wbuf_ofs == c->wbuf_ofs) { |
| 555 | |
| 556 | up(&c->alloc_sem); |
| 557 | |
| 558 | D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() calls gc pass\n")); |
| 559 | |
| 560 | ret = jffs2_garbage_collect_pass(c); |
| 561 | if (ret) { |
| 562 | /* GC failed. Flush it with padding instead */ |
| 563 | down(&c->alloc_sem); |
| 564 | down_write(&c->wbuf_sem); |
| 565 | ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 566 | /* retry flushing wbuf in case jffs2_wbuf_recover |
| 567 | left some data in the wbuf */ |
| 568 | if (ret) |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 569 | ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | up_write(&c->wbuf_sem); |
| 571 | break; |
| 572 | } |
| 573 | down(&c->alloc_sem); |
| 574 | } |
| 575 | |
| 576 | D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() ends...\n")); |
| 577 | |
| 578 | up(&c->alloc_sem); |
| 579 | return ret; |
| 580 | } |
| 581 | |
| 582 | /* Pad write-buffer to end and write it, wasting space. */ |
| 583 | int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c) |
| 584 | { |
| 585 | int ret; |
| 586 | |
David Woodhouse | 8aee6ac | 2005-02-02 22:12:08 +0000 | [diff] [blame] | 587 | if (!c->wbuf) |
| 588 | return 0; |
| 589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | down_write(&c->wbuf_sem); |
| 591 | ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); |
Estelle Hammache | 7f716cf | 2005-01-24 21:24:18 +0000 | [diff] [blame] | 592 | /* retry - maybe wbuf recover left some data in wbuf. */ |
| 593 | if (ret) |
| 594 | ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | up_write(&c->wbuf_sem); |
| 596 | |
| 597 | return ret; |
| 598 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 600 | static size_t jffs2_fill_wbuf(struct jffs2_sb_info *c, const uint8_t *buf, |
| 601 | size_t len) |
| 602 | { |
| 603 | if (len && !c->wbuf_len && (len >= c->wbuf_pagesize)) |
| 604 | return 0; |
| 605 | |
| 606 | if (len > (c->wbuf_pagesize - c->wbuf_len)) |
| 607 | len = c->wbuf_pagesize - c->wbuf_len; |
| 608 | memcpy(c->wbuf + c->wbuf_len, buf, len); |
| 609 | c->wbuf_len += (uint32_t) len; |
| 610 | return len; |
| 611 | } |
| 612 | |
| 613 | int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, |
| 614 | unsigned long count, loff_t to, size_t *retlen, |
| 615 | uint32_t ino) |
| 616 | { |
| 617 | struct jffs2_eraseblock *jeb; |
| 618 | size_t wbuf_retlen, donelen = 0; |
| 619 | uint32_t outvec_to = to; |
| 620 | int ret, invec; |
| 621 | |
| 622 | /* If not writebuffered flash, don't bother */ |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 623 | if (!jffs2_is_writebuffered(c)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | return jffs2_flash_direct_writev(c, invecs, count, to, retlen); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | down_write(&c->wbuf_sem); |
| 627 | |
| 628 | /* If wbuf_ofs is not initialized, set it to target address */ |
| 629 | if (c->wbuf_ofs == 0xFFFFFFFF) { |
| 630 | c->wbuf_ofs = PAGE_DIV(to); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 631 | c->wbuf_len = PAGE_MOD(to); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | memset(c->wbuf,0xff,c->wbuf_pagesize); |
| 633 | } |
| 634 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 635 | /* |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 636 | * Sanity checks on target address. It's permitted to write |
| 637 | * at PAD(c->wbuf_len+c->wbuf_ofs), and it's permitted to |
| 638 | * write at the beginning of a new erase block. Anything else, |
| 639 | * and you die. New block starts at xxx000c (0-b = block |
| 640 | * header) |
| 641 | */ |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 642 | if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | /* It's a write to a new block */ |
| 644 | if (c->wbuf_len) { |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 645 | D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx " |
| 646 | "causes flush of wbuf at 0x%08x\n", |
| 647 | (unsigned long)to, c->wbuf_ofs)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 649 | if (ret) |
| 650 | goto outerr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | } |
| 652 | /* set pointer to new block */ |
| 653 | c->wbuf_ofs = PAGE_DIV(to); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 654 | c->wbuf_len = PAGE_MOD(to); |
| 655 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
| 657 | if (to != PAD(c->wbuf_ofs + c->wbuf_len)) { |
| 658 | /* We're not writing immediately after the writebuffer. Bad. */ |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 659 | printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write " |
| 660 | "to %08lx\n", (unsigned long)to); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | if (c->wbuf_len) |
| 662 | printk(KERN_CRIT "wbuf was previously %08x-%08x\n", |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 663 | c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | BUG(); |
| 665 | } |
| 666 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 667 | /* adjust alignment offset */ |
| 668 | if (c->wbuf_len != PAGE_MOD(to)) { |
| 669 | c->wbuf_len = PAGE_MOD(to); |
| 670 | /* take care of alignment to next page */ |
| 671 | if (!c->wbuf_len) { |
| 672 | c->wbuf_len = c->wbuf_pagesize; |
| 673 | ret = __jffs2_flush_wbuf(c, NOPAD); |
| 674 | if (ret) |
| 675 | goto outerr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | } |
| 677 | } |
| 678 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 679 | for (invec = 0; invec < count; invec++) { |
| 680 | int vlen = invecs[invec].iov_len; |
| 681 | uint8_t *v = invecs[invec].iov_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 683 | wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 685 | if (c->wbuf_len == c->wbuf_pagesize) { |
| 686 | ret = __jffs2_flush_wbuf(c, NOPAD); |
| 687 | if (ret) |
| 688 | goto outerr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | } |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 690 | vlen -= wbuf_retlen; |
| 691 | outvec_to += wbuf_retlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | donelen += wbuf_retlen; |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 693 | v += wbuf_retlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 695 | if (vlen >= c->wbuf_pagesize) { |
| 696 | ret = c->mtd->write(c->mtd, outvec_to, PAGE_DIV(vlen), |
| 697 | &wbuf_retlen, v); |
| 698 | if (ret < 0 || wbuf_retlen != PAGE_DIV(vlen)) |
| 699 | goto outfile; |
| 700 | |
| 701 | vlen -= wbuf_retlen; |
| 702 | outvec_to += wbuf_retlen; |
| 703 | c->wbuf_ofs = outvec_to; |
| 704 | donelen += wbuf_retlen; |
| 705 | v += wbuf_retlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | } |
| 707 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 708 | wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); |
| 709 | if (c->wbuf_len == c->wbuf_pagesize) { |
| 710 | ret = __jffs2_flush_wbuf(c, NOPAD); |
| 711 | if (ret) |
| 712 | goto outerr; |
| 713 | } |
| 714 | |
| 715 | outvec_to += wbuf_retlen; |
| 716 | donelen += wbuf_retlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | } |
| 718 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 719 | /* |
| 720 | * If there's a remainder in the wbuf and it's a non-GC write, |
| 721 | * remember that the wbuf affects this ino |
| 722 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | *retlen = donelen; |
| 724 | |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 725 | if (jffs2_sum_active()) { |
| 726 | int res = jffs2_sum_add_kvec(c, invecs, count, (uint32_t) to); |
| 727 | if (res) |
| 728 | return res; |
| 729 | } |
| 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | if (c->wbuf_len && ino) |
| 732 | jffs2_wbuf_dirties_inode(c, ino); |
| 733 | |
| 734 | ret = 0; |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 735 | up_write(&c->wbuf_sem); |
| 736 | return ret; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 737 | |
Thomas Gleixner | dcb0932 | 2006-05-23 11:49:14 +0200 | [diff] [blame] | 738 | outfile: |
| 739 | /* |
| 740 | * At this point we have no problem, c->wbuf is empty. However |
| 741 | * refile nextblock to avoid writing again to same address. |
| 742 | */ |
| 743 | |
| 744 | spin_lock(&c->erase_completion_lock); |
| 745 | |
| 746 | jeb = &c->blocks[outvec_to / c->sector_size]; |
| 747 | jffs2_block_refile(c, jeb, REFILE_ANYWAY); |
| 748 | |
| 749 | spin_unlock(&c->erase_completion_lock); |
| 750 | |
| 751 | outerr: |
| 752 | *retlen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | up_write(&c->wbuf_sem); |
| 754 | return ret; |
| 755 | } |
| 756 | |
| 757 | /* |
| 758 | * This is the entry for flash write. |
| 759 | * Check, if we work on NAND FLASH, if so build an kvec and write it via vritev |
| 760 | */ |
| 761 | int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf) |
| 762 | { |
| 763 | struct kvec vecs[1]; |
| 764 | |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 765 | if (!jffs2_is_writebuffered(c)) |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 766 | return jffs2_flash_direct_write(c, ofs, len, retlen, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | |
| 768 | vecs[0].iov_base = (unsigned char *) buf; |
| 769 | vecs[0].iov_len = len; |
| 770 | return jffs2_flash_writev(c, vecs, 1, ofs, retlen, 0); |
| 771 | } |
| 772 | |
| 773 | /* |
| 774 | Handle readback from writebuffer and ECC failure return |
| 775 | */ |
| 776 | int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf) |
| 777 | { |
| 778 | loff_t orbf = 0, owbf = 0, lwbf = 0; |
| 779 | int ret; |
| 780 | |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 781 | if (!jffs2_is_writebuffered(c)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | return c->mtd->read(c->mtd, ofs, len, retlen, buf); |
| 783 | |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 784 | /* Read flash */ |
Artem B. Bityuckiy | 894214d | 2005-04-05 13:51:58 +0100 | [diff] [blame] | 785 | down_read(&c->wbuf_sem); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 786 | ret = c->mtd->read(c->mtd, ofs, len, retlen, buf); |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 787 | |
| 788 | if ( (ret == -EBADMSG) && (*retlen == len) ) { |
| 789 | printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n", |
| 790 | len, ofs); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 791 | /* |
| 792 | * We have the raw data without ECC correction in the buffer, maybe |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 793 | * we are lucky and all data or parts are correct. We check the node. |
| 794 | * If data are corrupted node check will sort it out. |
| 795 | * We keep this block, it will fail on write or erase and the we |
| 796 | * mark it bad. Or should we do that now? But we should give him a chance. |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 797 | * Maybe we had a system crash or power loss before the ecc write or |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 798 | * a erase was completed. |
| 799 | * So we return success. :) |
| 800 | */ |
| 801 | ret = 0; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 802 | } |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 803 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | /* if no writebuffer available or write buffer empty, return */ |
| 805 | if (!c->wbuf_pagesize || !c->wbuf_len) |
Artem B. Bityuckiy | 894214d | 2005-04-05 13:51:58 +0100 | [diff] [blame] | 806 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
| 808 | /* if we read in a different block, return */ |
Andrew Victor | 3be3667 | 2005-02-09 09:09:05 +0000 | [diff] [blame] | 809 | if (SECTOR_ADDR(ofs) != SECTOR_ADDR(c->wbuf_ofs)) |
Artem B. Bityuckiy | 894214d | 2005-04-05 13:51:58 +0100 | [diff] [blame] | 810 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
| 812 | if (ofs >= c->wbuf_ofs) { |
| 813 | owbf = (ofs - c->wbuf_ofs); /* offset in write buffer */ |
| 814 | if (owbf > c->wbuf_len) /* is read beyond write buffer ? */ |
| 815 | goto exit; |
| 816 | lwbf = c->wbuf_len - owbf; /* number of bytes to copy */ |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 817 | if (lwbf > len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | lwbf = len; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 819 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | orbf = (c->wbuf_ofs - ofs); /* offset in read buffer */ |
| 821 | if (orbf > len) /* is write beyond write buffer ? */ |
| 822 | goto exit; |
| 823 | lwbf = len - orbf; /* number of bytes to copy */ |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 824 | if (lwbf > c->wbuf_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | lwbf = c->wbuf_len; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 826 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | if (lwbf > 0) |
| 828 | memcpy(buf+orbf,c->wbuf+owbf,lwbf); |
| 829 | |
| 830 | exit: |
| 831 | up_read(&c->wbuf_sem); |
| 832 | return ret; |
| 833 | } |
| 834 | |
| 835 | /* |
| 836 | * Check, if the out of band area is empty |
| 837 | */ |
| 838 | int jffs2_check_oob_empty( struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int mode) |
| 839 | { |
| 840 | unsigned char *buf; |
| 841 | int ret = 0; |
| 842 | int i,len,page; |
| 843 | size_t retlen; |
| 844 | int oob_size; |
| 845 | |
| 846 | /* allocate a buffer for all oob data in this sector */ |
| 847 | oob_size = c->mtd->oobsize; |
| 848 | len = 4 * oob_size; |
| 849 | buf = kmalloc(len, GFP_KERNEL); |
| 850 | if (!buf) { |
| 851 | printk(KERN_NOTICE "jffs2_check_oob_empty(): allocation of temporary data buffer for oob check failed\n"); |
| 852 | return -ENOMEM; |
| 853 | } |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 854 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | * if mode = 0, we scan for a total empty oob area, else we have |
| 856 | * to take care of the cleanmarker in the first page of the block |
| 857 | */ |
| 858 | ret = jffs2_flash_read_oob(c, jeb->offset, len , &retlen, buf); |
| 859 | if (ret) { |
| 860 | D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB failed %d for block at %08x\n", ret, jeb->offset)); |
| 861 | goto out; |
| 862 | } |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 863 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | if (retlen < len) { |
| 865 | D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB return short read " |
| 866 | "(%zd bytes not %d) for block at %08x\n", retlen, len, jeb->offset)); |
| 867 | ret = -EIO; |
| 868 | goto out; |
| 869 | } |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | /* Special check for first page */ |
| 872 | for(i = 0; i < oob_size ; i++) { |
| 873 | /* Yeah, we know about the cleanmarker. */ |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 874 | if (mode && i >= c->fsdata_pos && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | i < c->fsdata_pos + c->fsdata_len) |
| 876 | continue; |
| 877 | |
| 878 | if (buf[i] != 0xFF) { |
| 879 | D2(printk(KERN_DEBUG "Found %02x at %x in OOB for %08x\n", |
Artem B. Bityutskiy | 730554d | 2005-07-17 07:56:26 +0100 | [diff] [blame] | 880 | buf[i], i, jeb->offset)); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 881 | ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | goto out; |
| 883 | } |
| 884 | } |
| 885 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 886 | /* we know, we are aligned :) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | for (page = oob_size; page < len; page += sizeof(long)) { |
| 888 | unsigned long dat = *(unsigned long *)(&buf[page]); |
| 889 | if(dat != -1) { |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 890 | ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | goto out; |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | out: |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 896 | kfree(buf); |
| 897 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | return ret; |
| 899 | } |
| 900 | |
| 901 | /* |
| 902 | * Scan for a valid cleanmarker and for bad blocks |
| 903 | * For virtual blocks (concatenated physical blocks) check the cleanmarker |
| 904 | * only in the first page of the first physical block, but scan for bad blocks in all |
| 905 | * physical blocks |
| 906 | */ |
| 907 | int jffs2_check_nand_cleanmarker (struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) |
| 908 | { |
| 909 | struct jffs2_unknown_node n; |
| 910 | unsigned char buf[2 * NAND_MAX_OOBSIZE]; |
| 911 | unsigned char *p; |
| 912 | int ret, i, cnt, retval = 0; |
| 913 | size_t retlen, offset; |
| 914 | int oob_size; |
| 915 | |
| 916 | offset = jeb->offset; |
| 917 | oob_size = c->mtd->oobsize; |
| 918 | |
| 919 | /* Loop through the physical blocks */ |
| 920 | for (cnt = 0; cnt < (c->sector_size / c->mtd->erasesize); cnt++) { |
| 921 | /* Check first if the block is bad. */ |
| 922 | if (c->mtd->block_isbad (c->mtd, offset)) { |
| 923 | D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Bad block at %08x\n", jeb->offset)); |
| 924 | return 2; |
| 925 | } |
| 926 | /* |
| 927 | * We read oob data from page 0 and 1 of the block. |
| 928 | * page 0 contains cleanmarker and badblock info |
| 929 | * page 1 contains failure count of this block |
| 930 | */ |
| 931 | ret = c->mtd->read_oob (c->mtd, offset, oob_size << 1, &retlen, buf); |
| 932 | |
| 933 | if (ret) { |
| 934 | D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Read OOB failed %d for block at %08x\n", ret, jeb->offset)); |
| 935 | return ret; |
| 936 | } |
| 937 | if (retlen < (oob_size << 1)) { |
| 938 | D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Read OOB return short read (%zd bytes not %d) for block at %08x\n", retlen, oob_size << 1, jeb->offset)); |
| 939 | return -EIO; |
| 940 | } |
| 941 | |
| 942 | /* Check cleanmarker only on the first physical block */ |
| 943 | if (!cnt) { |
| 944 | n.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK); |
| 945 | n.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER); |
| 946 | n.totlen = cpu_to_je32 (8); |
| 947 | p = (unsigned char *) &n; |
| 948 | |
| 949 | for (i = 0; i < c->fsdata_len; i++) { |
| 950 | if (buf[c->fsdata_pos + i] != p[i]) { |
| 951 | retval = 1; |
| 952 | } |
| 953 | } |
| 954 | D1(if (retval == 1) { |
| 955 | printk(KERN_WARNING "jffs2_check_nand_cleanmarker(): Cleanmarker node not detected in block at %08x\n", jeb->offset); |
| 956 | printk(KERN_WARNING "OOB at %08x was ", offset); |
| 957 | for (i=0; i < oob_size; i++) { |
| 958 | printk("%02x ", buf[i]); |
| 959 | } |
| 960 | printk("\n"); |
| 961 | }) |
| 962 | } |
| 963 | offset += c->mtd->erasesize; |
| 964 | } |
| 965 | return retval; |
| 966 | } |
| 967 | |
| 968 | int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) |
| 969 | { |
| 970 | struct jffs2_unknown_node n; |
| 971 | int ret; |
| 972 | size_t retlen; |
| 973 | |
| 974 | n.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
| 975 | n.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER); |
| 976 | n.totlen = cpu_to_je32(8); |
| 977 | |
| 978 | ret = jffs2_flash_write_oob(c, jeb->offset + c->fsdata_pos, c->fsdata_len, &retlen, (unsigned char *)&n); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | if (ret) { |
| 981 | D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Write failed for block at %08x: error %d\n", jeb->offset, ret)); |
| 982 | return ret; |
| 983 | } |
| 984 | if (retlen != c->fsdata_len) { |
| 985 | D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Short write for block at %08x: %zd not %d\n", jeb->offset, retlen, c->fsdata_len)); |
| 986 | return ret; |
| 987 | } |
| 988 | return 0; |
| 989 | } |
| 990 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 991 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | * On NAND we try to mark this block bad. If the block was erased more |
| 993 | * than MAX_ERASE_FAILURES we mark it finaly bad. |
| 994 | * Don't care about failures. This block remains on the erase-pending |
| 995 | * or badblock list as long as nobody manipulates the flash with |
| 996 | * a bootloader or something like that. |
| 997 | */ |
| 998 | |
| 999 | int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset) |
| 1000 | { |
| 1001 | int ret; |
| 1002 | |
| 1003 | /* if the count is < max, we try to write the counter to the 2nd page oob area */ |
| 1004 | if( ++jeb->bad_count < MAX_ERASE_FAILURES) |
| 1005 | return 0; |
| 1006 | |
| 1007 | if (!c->mtd->block_markbad) |
| 1008 | return 1; // What else can we do? |
| 1009 | |
| 1010 | D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Marking bad block at %08x\n", bad_offset)); |
| 1011 | ret = c->mtd->block_markbad(c->mtd, bad_offset); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1012 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | if (ret) { |
| 1014 | D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Write failed for block at %08x: error %d\n", jeb->offset, ret)); |
| 1015 | return ret; |
| 1016 | } |
| 1017 | return 1; |
| 1018 | } |
| 1019 | |
| 1020 | #define NAND_JFFS2_OOB16_FSDALEN 8 |
| 1021 | |
| 1022 | static struct nand_oobinfo jffs2_oobinfo_docecc = { |
| 1023 | .useecc = MTD_NANDECC_PLACE, |
| 1024 | .eccbytes = 6, |
| 1025 | .eccpos = {0,1,2,3,4,5} |
| 1026 | }; |
| 1027 | |
| 1028 | |
| 1029 | static int jffs2_nand_set_oobinfo(struct jffs2_sb_info *c) |
| 1030 | { |
| 1031 | struct nand_oobinfo *oinfo = &c->mtd->oobinfo; |
| 1032 | |
| 1033 | /* Do this only, if we have an oob buffer */ |
| 1034 | if (!c->mtd->oobsize) |
| 1035 | return 0; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1036 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | /* Cleanmarker is out-of-band, so inline size zero */ |
| 1038 | c->cleanmarker_size = 0; |
| 1039 | |
| 1040 | /* Should we use autoplacement ? */ |
| 1041 | if (oinfo && oinfo->useecc == MTD_NANDECC_AUTOPLACE) { |
| 1042 | D1(printk(KERN_DEBUG "JFFS2 using autoplace on NAND\n")); |
| 1043 | /* Get the position of the free bytes */ |
| 1044 | if (!oinfo->oobfree[0][1]) { |
| 1045 | printk (KERN_WARNING "jffs2_nand_set_oobinfo(): Eeep. Autoplacement selected and no empty space in oob\n"); |
| 1046 | return -ENOSPC; |
| 1047 | } |
| 1048 | c->fsdata_pos = oinfo->oobfree[0][0]; |
| 1049 | c->fsdata_len = oinfo->oobfree[0][1]; |
| 1050 | if (c->fsdata_len > 8) |
| 1051 | c->fsdata_len = 8; |
| 1052 | } else { |
| 1053 | /* This is just a legacy fallback and should go away soon */ |
| 1054 | switch(c->mtd->ecctype) { |
| 1055 | case MTD_ECC_RS_DiskOnChip: |
| 1056 | printk(KERN_WARNING "JFFS2 using DiskOnChip hardware ECC without autoplacement. Fix it!\n"); |
| 1057 | c->oobinfo = &jffs2_oobinfo_docecc; |
| 1058 | c->fsdata_pos = 6; |
| 1059 | c->fsdata_len = NAND_JFFS2_OOB16_FSDALEN; |
| 1060 | c->badblock_pos = 15; |
| 1061 | break; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1062 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | default: |
| 1064 | D1(printk(KERN_DEBUG "JFFS2 on NAND. No autoplacment info found\n")); |
| 1065 | return -EINVAL; |
| 1066 | } |
| 1067 | } |
| 1068 | return 0; |
| 1069 | } |
| 1070 | |
| 1071 | int jffs2_nand_flash_setup(struct jffs2_sb_info *c) |
| 1072 | { |
| 1073 | int res; |
| 1074 | |
| 1075 | /* Initialise write buffer */ |
| 1076 | init_rwsem(&c->wbuf_sem); |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1077 | c->wbuf_pagesize = c->mtd->writesize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | c->wbuf_ofs = 0xFFFFFFFF; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1079 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); |
| 1081 | if (!c->wbuf) |
| 1082 | return -ENOMEM; |
| 1083 | |
| 1084 | res = jffs2_nand_set_oobinfo(c); |
| 1085 | |
| 1086 | #ifdef BREAKME |
| 1087 | if (!brokenbuf) |
| 1088 | brokenbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); |
| 1089 | if (!brokenbuf) { |
| 1090 | kfree(c->wbuf); |
| 1091 | return -ENOMEM; |
| 1092 | } |
| 1093 | memset(brokenbuf, 0xdb, c->wbuf_pagesize); |
| 1094 | #endif |
| 1095 | return res; |
| 1096 | } |
| 1097 | |
| 1098 | void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c) |
| 1099 | { |
| 1100 | kfree(c->wbuf); |
| 1101 | } |
| 1102 | |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 1103 | int jffs2_dataflash_setup(struct jffs2_sb_info *c) { |
| 1104 | c->cleanmarker_size = 0; /* No cleanmarkers needed */ |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1105 | |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 1106 | /* Initialize write buffer */ |
| 1107 | init_rwsem(&c->wbuf_sem); |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 1108 | |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1109 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 1110 | c->wbuf_pagesize = c->mtd->erasesize; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1111 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 1112 | /* Find a suitable c->sector_size |
| 1113 | * - Not too much sectors |
| 1114 | * - Sectors have to be at least 4 K + some bytes |
| 1115 | * - All known dataflashes have erase sizes of 528 or 1056 |
| 1116 | * - we take at least 8 eraseblocks and want to have at least 8K size |
| 1117 | * - The concatenation should be a power of 2 |
| 1118 | */ |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 1119 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 1120 | c->sector_size = 8 * c->mtd->erasesize; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1121 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 1122 | while (c->sector_size < 8192) { |
| 1123 | c->sector_size *= 2; |
| 1124 | } |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1125 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 1126 | /* It may be necessary to adjust the flash size */ |
| 1127 | c->flash_size = c->mtd->size; |
| 1128 | |
| 1129 | if ((c->flash_size % c->sector_size) != 0) { |
| 1130 | c->flash_size = (c->flash_size / c->sector_size) * c->sector_size; |
| 1131 | printk(KERN_WARNING "JFFS2 flash size adjusted to %dKiB\n", c->flash_size); |
| 1132 | }; |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 1133 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 1134 | c->wbuf_ofs = 0xFFFFFFFF; |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 1135 | c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); |
| 1136 | if (!c->wbuf) |
| 1137 | return -ENOMEM; |
| 1138 | |
Artem B. Bityutskiy | daba5cc | 2005-09-30 14:59:17 +0100 | [diff] [blame] | 1139 | printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size); |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 1140 | |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | void jffs2_dataflash_cleanup(struct jffs2_sb_info *c) { |
| 1145 | kfree(c->wbuf); |
| 1146 | } |
Andrew Victor | 8f15fd5 | 2005-02-09 09:17:45 +0000 | [diff] [blame] | 1147 | |
Nicolas Pitre | 59da721 | 2005-08-06 05:51:33 +0100 | [diff] [blame] | 1148 | int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) { |
Joern Engel | c8b229d | 2006-05-22 23:18:12 +0200 | [diff] [blame] | 1149 | /* Cleanmarker currently occupies whole programming regions, |
| 1150 | * either one or 2 for 8Byte STMicro flashes. */ |
| 1151 | c->cleanmarker_size = max(16u, c->mtd->writesize); |
Nicolas Pitre | 59da721 | 2005-08-06 05:51:33 +0100 | [diff] [blame] | 1152 | |
| 1153 | /* Initialize write buffer */ |
| 1154 | init_rwsem(&c->wbuf_sem); |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1155 | c->wbuf_pagesize = c->mtd->writesize; |
Nicolas Pitre | 59da721 | 2005-08-06 05:51:33 +0100 | [diff] [blame] | 1156 | c->wbuf_ofs = 0xFFFFFFFF; |
| 1157 | |
| 1158 | c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); |
| 1159 | if (!c->wbuf) |
| 1160 | return -ENOMEM; |
| 1161 | |
| 1162 | return 0; |
| 1163 | } |
| 1164 | |
| 1165 | void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) { |
| 1166 | kfree(c->wbuf); |
| 1167 | } |