11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 2001-2003 Red Hat, Inc. 51da177e4SLinus Torvalds * Copyright (C) 2004 Thomas Gleixner <tglx@linutronix.de> 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * Created by David Woodhouse <dwmw2@infradead.org> 81da177e4SLinus Torvalds * Modified debugged and enhanced by Thomas Gleixner <tglx@linutronix.de> 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * For licensing information, see the file 'LICENCE' in this directory. 111da177e4SLinus Torvalds * 12daba5cc4SArtem B. Bityutskiy * $Id: wbuf.c,v 1.100 2005/09/30 13:59:13 dedekind Exp $ 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds */ 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/mtd/mtd.h> 191da177e4SLinus Torvalds #include <linux/crc32.h> 201da177e4SLinus Torvalds #include <linux/mtd/nand.h> 214e57b681STim Schmielau #include <linux/jiffies.h> 224e57b681STim Schmielau 231da177e4SLinus Torvalds #include "nodelist.h" 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds /* For testing write failures */ 261da177e4SLinus Torvalds #undef BREAKME 271da177e4SLinus Torvalds #undef BREAKMEHEADER 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds #ifdef BREAKME 301da177e4SLinus Torvalds static unsigned char *brokenbuf; 311da177e4SLinus Torvalds #endif 321da177e4SLinus Torvalds 33daba5cc4SArtem B. Bityutskiy #define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) ) 34daba5cc4SArtem B. Bityutskiy #define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) ) 35daba5cc4SArtem B. Bityutskiy 361da177e4SLinus Torvalds /* max. erase failures before we mark a block bad */ 371da177e4SLinus Torvalds #define MAX_ERASE_FAILURES 2 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds struct jffs2_inodirty { 401da177e4SLinus Torvalds uint32_t ino; 411da177e4SLinus Torvalds struct jffs2_inodirty *next; 421da177e4SLinus Torvalds }; 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds static struct jffs2_inodirty inodirty_nomem; 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds static int jffs2_wbuf_pending_for_ino(struct jffs2_sb_info *c, uint32_t ino) 471da177e4SLinus Torvalds { 481da177e4SLinus Torvalds struct jffs2_inodirty *this = c->wbuf_inodes; 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* If a malloc failed, consider _everything_ dirty */ 511da177e4SLinus Torvalds if (this == &inodirty_nomem) 521da177e4SLinus Torvalds return 1; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds /* If ino == 0, _any_ non-GC writes mean 'yes' */ 551da177e4SLinus Torvalds if (this && !ino) 561da177e4SLinus Torvalds return 1; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* Look to see if the inode in question is pending in the wbuf */ 591da177e4SLinus Torvalds while (this) { 601da177e4SLinus Torvalds if (this->ino == ino) 611da177e4SLinus Torvalds return 1; 621da177e4SLinus Torvalds this = this->next; 631da177e4SLinus Torvalds } 641da177e4SLinus Torvalds return 0; 651da177e4SLinus Torvalds } 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds static void jffs2_clear_wbuf_ino_list(struct jffs2_sb_info *c) 681da177e4SLinus Torvalds { 691da177e4SLinus Torvalds struct jffs2_inodirty *this; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds this = c->wbuf_inodes; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds if (this != &inodirty_nomem) { 741da177e4SLinus Torvalds while (this) { 751da177e4SLinus Torvalds struct jffs2_inodirty *next = this->next; 761da177e4SLinus Torvalds kfree(this); 771da177e4SLinus Torvalds this = next; 781da177e4SLinus Torvalds } 791da177e4SLinus Torvalds } 801da177e4SLinus Torvalds c->wbuf_inodes = NULL; 811da177e4SLinus Torvalds } 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds static void jffs2_wbuf_dirties_inode(struct jffs2_sb_info *c, uint32_t ino) 841da177e4SLinus Torvalds { 851da177e4SLinus Torvalds struct jffs2_inodirty *new; 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds /* Mark the superblock dirty so that kupdated will flush... */ 884d952709SArtem B. Bityuckiy jffs2_erase_pending_trigger(c); 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds if (jffs2_wbuf_pending_for_ino(c, ino)) 911da177e4SLinus Torvalds return; 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds new = kmalloc(sizeof(*new), GFP_KERNEL); 941da177e4SLinus Torvalds if (!new) { 951da177e4SLinus Torvalds D1(printk(KERN_DEBUG "No memory to allocate inodirty. Fallback to all considered dirty\n")); 961da177e4SLinus Torvalds jffs2_clear_wbuf_ino_list(c); 971da177e4SLinus Torvalds c->wbuf_inodes = &inodirty_nomem; 981da177e4SLinus Torvalds return; 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds new->ino = ino; 1011da177e4SLinus Torvalds new->next = c->wbuf_inodes; 1021da177e4SLinus Torvalds c->wbuf_inodes = new; 1031da177e4SLinus Torvalds return; 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds static inline void jffs2_refile_wbuf_blocks(struct jffs2_sb_info *c) 1071da177e4SLinus Torvalds { 1081da177e4SLinus Torvalds struct list_head *this, *next; 1091da177e4SLinus Torvalds static int n; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds if (list_empty(&c->erasable_pending_wbuf_list)) 1121da177e4SLinus Torvalds return; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds list_for_each_safe(this, next, &c->erasable_pending_wbuf_list) { 1151da177e4SLinus Torvalds struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list); 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Removing eraseblock at 0x%08x from erasable_pending_wbuf_list...\n", jeb->offset)); 1181da177e4SLinus Torvalds list_del(this); 1191da177e4SLinus Torvalds if ((jiffies + (n++)) & 127) { 1201da177e4SLinus Torvalds /* Most of the time, we just erase it immediately. Otherwise we 1211da177e4SLinus Torvalds spend ages scanning it on mount, etc. */ 1221da177e4SLinus Torvalds D1(printk(KERN_DEBUG "...and adding to erase_pending_list\n")); 1231da177e4SLinus Torvalds list_add_tail(&jeb->list, &c->erase_pending_list); 1241da177e4SLinus Torvalds c->nr_erasing_blocks++; 1251da177e4SLinus Torvalds jffs2_erase_pending_trigger(c); 1261da177e4SLinus Torvalds } else { 1271da177e4SLinus Torvalds /* Sometimes, however, we leave it elsewhere so it doesn't get 1281da177e4SLinus Torvalds immediately reused, and we spread the load a bit. */ 1291da177e4SLinus Torvalds D1(printk(KERN_DEBUG "...and adding to erasable_list\n")); 1301da177e4SLinus Torvalds list_add_tail(&jeb->list, &c->erasable_list); 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1357f716cf3SEstelle Hammache #define REFILE_NOTEMPTY 0 1367f716cf3SEstelle Hammache #define REFILE_ANYWAY 1 1377f716cf3SEstelle Hammache 1387f716cf3SEstelle Hammache static void jffs2_block_refile(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int allow_empty) 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds D1(printk("About to refile bad block at %08x\n", jeb->offset)); 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds /* File the existing block on the bad_used_list.... */ 1431da177e4SLinus Torvalds if (c->nextblock == jeb) 1441da177e4SLinus Torvalds c->nextblock = NULL; 1451da177e4SLinus Torvalds else /* Not sure this should ever happen... need more coffee */ 1461da177e4SLinus Torvalds list_del(&jeb->list); 1471da177e4SLinus Torvalds if (jeb->first_node) { 1481da177e4SLinus Torvalds D1(printk("Refiling block at %08x to bad_used_list\n", jeb->offset)); 1491da177e4SLinus Torvalds list_add(&jeb->list, &c->bad_used_list); 1501da177e4SLinus Torvalds } else { 1519b88f473SEstelle Hammache BUG_ON(allow_empty == REFILE_NOTEMPTY); 1521da177e4SLinus Torvalds /* It has to have had some nodes or we couldn't be here */ 1531da177e4SLinus Torvalds D1(printk("Refiling block at %08x to erase_pending_list\n", jeb->offset)); 1541da177e4SLinus Torvalds list_add(&jeb->list, &c->erase_pending_list); 1551da177e4SLinus Torvalds c->nr_erasing_blocks++; 1561da177e4SLinus Torvalds jffs2_erase_pending_trigger(c); 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* Adjust its size counts accordingly */ 1601da177e4SLinus Torvalds c->wasted_size += jeb->free_size; 1611da177e4SLinus Torvalds c->free_size -= jeb->free_size; 1621da177e4SLinus Torvalds jeb->wasted_size += jeb->free_size; 1631da177e4SLinus Torvalds jeb->free_size = 0; 1641da177e4SLinus Torvalds 165e0c8e42fSArtem B. Bityutskiy jffs2_dbg_dump_block_lists_nolock(c); 166e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_sanity_check_nolock(c,jeb); 167e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check_nolock(c, jeb); 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds /* Recover from failure to write wbuf. Recover the nodes up to the 1711da177e4SLinus Torvalds * wbuf, not the one which we were starting to try to write. */ 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds static void jffs2_wbuf_recover(struct jffs2_sb_info *c) 1741da177e4SLinus Torvalds { 1751da177e4SLinus Torvalds struct jffs2_eraseblock *jeb, *new_jeb; 1761da177e4SLinus Torvalds struct jffs2_raw_node_ref **first_raw, **raw; 1771da177e4SLinus Torvalds size_t retlen; 1781da177e4SLinus Torvalds int ret; 1791da177e4SLinus Torvalds unsigned char *buf; 1801da177e4SLinus Torvalds uint32_t start, end, ofs, len; 1811da177e4SLinus Torvalds 1822f785402SDavid Woodhouse if (jffs2_prealloc_raw_node_refs(c, c->reserved_refs + 1)) 1832f785402SDavid Woodhouse return; 1842f785402SDavid Woodhouse 1851da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds jeb = &c->blocks[c->wbuf_ofs / c->sector_size]; 1881da177e4SLinus Torvalds 1897f716cf3SEstelle Hammache jffs2_block_refile(c, jeb, REFILE_NOTEMPTY); 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds /* Find the first node to be recovered, by skipping over every 1921da177e4SLinus Torvalds node which ends before the wbuf starts, or which is obsolete. */ 1931da177e4SLinus Torvalds first_raw = &jeb->first_node; 1941da177e4SLinus Torvalds while (*first_raw && 1951da177e4SLinus Torvalds (ref_obsolete(*first_raw) || 1961da177e4SLinus Torvalds (ref_offset(*first_raw)+ref_totlen(c, jeb, *first_raw)) < c->wbuf_ofs)) { 1971da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Skipping node at 0x%08x(%d)-0x%08x which is either before 0x%08x or obsolete\n", 1981da177e4SLinus Torvalds ref_offset(*first_raw), ref_flags(*first_raw), 1991da177e4SLinus Torvalds (ref_offset(*first_raw) + ref_totlen(c, jeb, *first_raw)), 2001da177e4SLinus Torvalds c->wbuf_ofs)); 2011da177e4SLinus Torvalds first_raw = &(*first_raw)->next_phys; 2021da177e4SLinus Torvalds } 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds if (!*first_raw) { 2051da177e4SLinus Torvalds /* All nodes were obsolete. Nothing to recover. */ 2061da177e4SLinus Torvalds D1(printk(KERN_DEBUG "No non-obsolete nodes to be recovered. Just filing block bad\n")); 2071da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 2081da177e4SLinus Torvalds return; 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds start = ref_offset(*first_raw); 2121da177e4SLinus Torvalds end = ref_offset(*first_raw) + ref_totlen(c, jeb, *first_raw); 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds /* Find the last node to be recovered */ 2151da177e4SLinus Torvalds raw = first_raw; 2161da177e4SLinus Torvalds while ((*raw)) { 2171da177e4SLinus Torvalds if (!ref_obsolete(*raw)) 2181da177e4SLinus Torvalds end = ref_offset(*raw) + ref_totlen(c, jeb, *raw); 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds raw = &(*raw)->next_phys; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds D1(printk(KERN_DEBUG "wbuf recover %08x-%08x\n", start, end)); 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds buf = NULL; 2271da177e4SLinus Torvalds if (start < c->wbuf_ofs) { 2281da177e4SLinus Torvalds /* First affected node was already partially written. 2291da177e4SLinus Torvalds * Attempt to reread the old data into our buffer. */ 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds buf = kmalloc(end - start, GFP_KERNEL); 2321da177e4SLinus Torvalds if (!buf) { 2331da177e4SLinus Torvalds printk(KERN_CRIT "Malloc failure in wbuf recovery. Data loss ensues.\n"); 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds goto read_failed; 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds /* Do the read... */ 2391da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 2401da177e4SLinus Torvalds ret = c->mtd->read_ecc(c->mtd, start, c->wbuf_ofs - start, &retlen, buf, NULL, c->oobinfo); 2411da177e4SLinus Torvalds else 2421da177e4SLinus Torvalds ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf); 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds if (ret == -EBADMSG && retlen == c->wbuf_ofs - start) { 2451da177e4SLinus Torvalds /* ECC recovered */ 2461da177e4SLinus Torvalds ret = 0; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds if (ret || retlen != c->wbuf_ofs - start) { 2491da177e4SLinus Torvalds printk(KERN_CRIT "Old data are already lost in wbuf recovery. Data loss ensues.\n"); 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds kfree(buf); 2521da177e4SLinus Torvalds buf = NULL; 2531da177e4SLinus Torvalds read_failed: 2541da177e4SLinus Torvalds first_raw = &(*first_raw)->next_phys; 2551da177e4SLinus Torvalds /* If this was the only node to be recovered, give up */ 2561da177e4SLinus Torvalds if (!(*first_raw)) 2571da177e4SLinus Torvalds return; 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds /* It wasn't. Go on and try to recover nodes complete in the wbuf */ 2601da177e4SLinus Torvalds start = ref_offset(*first_raw); 2611da177e4SLinus Torvalds } else { 2621da177e4SLinus Torvalds /* Read succeeded. Copy the remaining data from the wbuf */ 2631da177e4SLinus Torvalds memcpy(buf + (c->wbuf_ofs - start), c->wbuf, end - c->wbuf_ofs); 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds } 2661da177e4SLinus Torvalds /* OK... we're to rewrite (end-start) bytes of data from first_raw onwards. 2671da177e4SLinus Torvalds Either 'buf' contains the data, or we find it in the wbuf */ 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds /* ... and get an allocation of space from a shiny new block instead */ 2719fe4854cSDavid Woodhouse ret = jffs2_reserve_space_gc(c, end-start, &len, JFFS2_SUMMARY_NOSUM_SIZE); 2721da177e4SLinus Torvalds if (ret) { 2731da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate space for wbuf recovery. Data loss ensues.\n"); 2741da177e4SLinus Torvalds kfree(buf); 2751da177e4SLinus Torvalds return; 2761da177e4SLinus Torvalds } 2779fe4854cSDavid Woodhouse ofs = write_ofs(c); 2789fe4854cSDavid Woodhouse 2791da177e4SLinus Torvalds if (end-start >= c->wbuf_pagesize) { 2807f716cf3SEstelle Hammache /* Need to do another write immediately, but it's possible 2817f716cf3SEstelle Hammache that this is just because the wbuf itself is completely 2827f716cf3SEstelle Hammache full, and there's nothing earlier read back from the 2837f716cf3SEstelle Hammache flash. Hence 'buf' isn't necessarily what we're writing 2847f716cf3SEstelle Hammache from. */ 2857f716cf3SEstelle Hammache unsigned char *rewrite_buf = buf?:c->wbuf; 2861da177e4SLinus Torvalds uint32_t towrite = (end-start) - ((end-start)%c->wbuf_pagesize); 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Write 0x%x bytes at 0x%08x in wbuf recover\n", 2891da177e4SLinus Torvalds towrite, ofs)); 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds #ifdef BREAKMEHEADER 2921da177e4SLinus Torvalds static int breakme; 2931da177e4SLinus Torvalds if (breakme++ == 20) { 2941da177e4SLinus Torvalds printk(KERN_NOTICE "Faking write error at 0x%08x\n", ofs); 2951da177e4SLinus Torvalds breakme = 0; 2961da177e4SLinus Torvalds c->mtd->write_ecc(c->mtd, ofs, towrite, &retlen, 2971da177e4SLinus Torvalds brokenbuf, NULL, c->oobinfo); 2981da177e4SLinus Torvalds ret = -EIO; 2991da177e4SLinus Torvalds } else 3001da177e4SLinus Torvalds #endif 3011da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 3021da177e4SLinus Torvalds ret = c->mtd->write_ecc(c->mtd, ofs, towrite, &retlen, 3037f716cf3SEstelle Hammache rewrite_buf, NULL, c->oobinfo); 3041da177e4SLinus Torvalds else 3057f716cf3SEstelle Hammache ret = c->mtd->write(c->mtd, ofs, towrite, &retlen, rewrite_buf); 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds if (ret || retlen != towrite) { 3081da177e4SLinus Torvalds /* Argh. We tried. Really we did. */ 3091da177e4SLinus Torvalds printk(KERN_CRIT "Recovery of wbuf failed due to a second write error\n"); 3101da177e4SLinus Torvalds kfree(buf); 3111da177e4SLinus Torvalds 3122f785402SDavid Woodhouse if (retlen) 3132f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, ofs | REF_OBSOLETE, ref_totlen(c, jeb, *first_raw), NULL); 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds return; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds printk(KERN_NOTICE "Recovery of wbuf succeeded to %08x\n", ofs); 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds c->wbuf_len = (end - start) - towrite; 3201da177e4SLinus Torvalds c->wbuf_ofs = ofs + towrite; 3217f716cf3SEstelle Hammache memmove(c->wbuf, rewrite_buf + towrite, c->wbuf_len); 3221da177e4SLinus Torvalds /* Don't muck about with c->wbuf_inodes. False positives are harmless. */ 3231da177e4SLinus Torvalds kfree(buf); 3241da177e4SLinus Torvalds } else { 3251da177e4SLinus Torvalds /* OK, now we're left with the dregs in whichever buffer we're using */ 3261da177e4SLinus Torvalds if (buf) { 3271da177e4SLinus Torvalds memcpy(c->wbuf, buf, end-start); 3281da177e4SLinus Torvalds kfree(buf); 3291da177e4SLinus Torvalds } else { 3301da177e4SLinus Torvalds memmove(c->wbuf, c->wbuf + (start - c->wbuf_ofs), end - start); 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds c->wbuf_ofs = ofs; 3331da177e4SLinus Torvalds c->wbuf_len = end - start; 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds /* Now sort out the jffs2_raw_node_refs, moving them from the old to the next block */ 3371da177e4SLinus Torvalds new_jeb = &c->blocks[ofs / c->sector_size]; 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 3401da177e4SLinus Torvalds if (new_jeb->first_node) { 3411da177e4SLinus Torvalds /* Odd, but possible with ST flash later maybe */ 3421da177e4SLinus Torvalds new_jeb->last_node->next_phys = *first_raw; 3431da177e4SLinus Torvalds } else { 3441da177e4SLinus Torvalds new_jeb->first_node = *first_raw; 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds raw = first_raw; 3481da177e4SLinus Torvalds while (*raw) { 3491da177e4SLinus Torvalds uint32_t rawlen = ref_totlen(c, jeb, *raw); 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Refiling block of %08x at %08x(%d) to %08x\n", 3521da177e4SLinus Torvalds rawlen, ref_offset(*raw), ref_flags(*raw), ofs)); 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds if (ref_obsolete(*raw)) { 3551da177e4SLinus Torvalds /* Shouldn't really happen much */ 3561da177e4SLinus Torvalds new_jeb->dirty_size += rawlen; 3571da177e4SLinus Torvalds new_jeb->free_size -= rawlen; 3581da177e4SLinus Torvalds c->dirty_size += rawlen; 3591da177e4SLinus Torvalds } else { 3601da177e4SLinus Torvalds new_jeb->used_size += rawlen; 3611da177e4SLinus Torvalds new_jeb->free_size -= rawlen; 3621da177e4SLinus Torvalds jeb->dirty_size += rawlen; 3631da177e4SLinus Torvalds jeb->used_size -= rawlen; 3641da177e4SLinus Torvalds c->dirty_size += rawlen; 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds c->free_size -= rawlen; 3671da177e4SLinus Torvalds (*raw)->flash_offset = ofs | ref_flags(*raw); 3681da177e4SLinus Torvalds ofs += rawlen; 3691da177e4SLinus Torvalds new_jeb->last_node = *raw; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds raw = &(*raw)->next_phys; 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds /* Fix up the original jeb now it's on the bad_list */ 3751da177e4SLinus Torvalds *first_raw = NULL; 3761da177e4SLinus Torvalds if (first_raw == &jeb->first_node) { 3771da177e4SLinus Torvalds jeb->last_node = NULL; 3781da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failing block at %08x is now empty. Moving to erase_pending_list\n", jeb->offset)); 3791da177e4SLinus Torvalds list_del(&jeb->list); 3801da177e4SLinus Torvalds list_add(&jeb->list, &c->erase_pending_list); 3811da177e4SLinus Torvalds c->nr_erasing_blocks++; 3821da177e4SLinus Torvalds jffs2_erase_pending_trigger(c); 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds else 3851da177e4SLinus Torvalds jeb->last_node = container_of(first_raw, struct jffs2_raw_node_ref, next_phys); 3861da177e4SLinus Torvalds 387e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_sanity_check_nolock(c, jeb); 388e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check_nolock(c, jeb); 3891da177e4SLinus Torvalds 390e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_sanity_check_nolock(c, new_jeb); 391e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check_nolock(c, new_jeb); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 3941da177e4SLinus Torvalds 3951da177e4SLinus Torvalds D1(printk(KERN_DEBUG "wbuf recovery completed OK\n")); 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds /* Meaning of pad argument: 3991da177e4SLinus Torvalds 0: Do not pad. Probably pointless - we only ever use this when we can't pad anyway. 4001da177e4SLinus Torvalds 1: Pad, do not adjust nextblock free_size 4011da177e4SLinus Torvalds 2: Pad, adjust nextblock free_size 4021da177e4SLinus Torvalds */ 4031da177e4SLinus Torvalds #define NOPAD 0 4041da177e4SLinus Torvalds #define PAD_NOACCOUNT 1 4051da177e4SLinus Torvalds #define PAD_ACCOUNTING 2 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad) 4081da177e4SLinus Torvalds { 4091da177e4SLinus Torvalds int ret; 4101da177e4SLinus Torvalds size_t retlen; 4111da177e4SLinus Torvalds 4123be36675SAndrew Victor /* Nothing to do if not write-buffering the flash. In particular, we shouldn't 4131da177e4SLinus Torvalds del_timer() the timer we never initialised. */ 4143be36675SAndrew Victor if (!jffs2_is_writebuffered(c)) 4151da177e4SLinus Torvalds return 0; 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds if (!down_trylock(&c->alloc_sem)) { 4181da177e4SLinus Torvalds up(&c->alloc_sem); 4191da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf() called with alloc_sem not locked!\n"); 4201da177e4SLinus Torvalds BUG(); 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds 4233be36675SAndrew Victor if (!c->wbuf_len) /* already checked c->wbuf above */ 4241da177e4SLinus Torvalds return 0; 4251da177e4SLinus Torvalds 4262f785402SDavid Woodhouse if (jffs2_prealloc_raw_node_refs(c, c->reserved_refs + 1)) 4272f785402SDavid Woodhouse return -ENOMEM; 4282f785402SDavid Woodhouse 4291da177e4SLinus Torvalds /* claim remaining space on the page 4301da177e4SLinus Torvalds this happens, if we have a change to a new block, 4311da177e4SLinus Torvalds or if fsync forces us to flush the writebuffer. 4321da177e4SLinus Torvalds if we have a switch to next page, we will not have 4331da177e4SLinus Torvalds enough remaining space for this. 4341da177e4SLinus Torvalds */ 435daba5cc4SArtem B. Bityutskiy if (pad ) { 4361da177e4SLinus Torvalds c->wbuf_len = PAD(c->wbuf_len); 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds /* Pad with JFFS2_DIRTY_BITMASK initially. this helps out ECC'd NOR 4391da177e4SLinus Torvalds with 8 byte page size */ 4401da177e4SLinus Torvalds memset(c->wbuf + c->wbuf_len, 0, c->wbuf_pagesize - c->wbuf_len); 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds if ( c->wbuf_len + sizeof(struct jffs2_unknown_node) < c->wbuf_pagesize) { 4431da177e4SLinus Torvalds struct jffs2_unknown_node *padnode = (void *)(c->wbuf + c->wbuf_len); 4441da177e4SLinus Torvalds padnode->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 4451da177e4SLinus Torvalds padnode->nodetype = cpu_to_je16(JFFS2_NODETYPE_PADDING); 4461da177e4SLinus Torvalds padnode->totlen = cpu_to_je32(c->wbuf_pagesize - c->wbuf_len); 4471da177e4SLinus Torvalds padnode->hdr_crc = cpu_to_je32(crc32(0, padnode, sizeof(*padnode)-4)); 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds /* else jffs2_flash_writev has actually filled in the rest of the 4511da177e4SLinus Torvalds buffer for us, and will deal with the node refs etc. later. */ 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds #ifdef BREAKME 4541da177e4SLinus Torvalds static int breakme; 4551da177e4SLinus Torvalds if (breakme++ == 20) { 4561da177e4SLinus Torvalds printk(KERN_NOTICE "Faking write error at 0x%08x\n", c->wbuf_ofs); 4571da177e4SLinus Torvalds breakme = 0; 4581da177e4SLinus Torvalds c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, 4591da177e4SLinus Torvalds &retlen, brokenbuf, NULL, c->oobinfo); 4601da177e4SLinus Torvalds ret = -EIO; 4611da177e4SLinus Torvalds } else 4621da177e4SLinus Torvalds #endif 4631da177e4SLinus Torvalds 4641da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 4651da177e4SLinus Torvalds ret = c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf, NULL, c->oobinfo); 4661da177e4SLinus Torvalds else 4671da177e4SLinus Torvalds ret = c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf); 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds if (ret || retlen != c->wbuf_pagesize) { 4701da177e4SLinus Torvalds if (ret) 4711da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_flush_wbuf(): Write failed with %d\n",ret); 4721da177e4SLinus Torvalds else { 4731da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_flush_wbuf(): Write was short: %zd instead of %d\n", 4741da177e4SLinus Torvalds retlen, c->wbuf_pagesize); 4751da177e4SLinus Torvalds ret = -EIO; 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds jffs2_wbuf_recover(c); 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds return ret; 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds /* Adjust free size of the block if we padded. */ 484daba5cc4SArtem B. Bityutskiy if (pad) { 4851da177e4SLinus Torvalds struct jffs2_eraseblock *jeb; 4860bcc099dSDavid Woodhouse uint32_t waste = c->wbuf_pagesize - c->wbuf_len; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds jeb = &c->blocks[c->wbuf_ofs / c->sector_size]; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf() adjusting free_size of %sblock at %08x\n", 4911da177e4SLinus Torvalds (jeb==c->nextblock)?"next":"", jeb->offset)); 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds /* wbuf_pagesize - wbuf_len is the amount of space that's to be 4941da177e4SLinus Torvalds padded. If there is less free space in the block than that, 4951da177e4SLinus Torvalds something screwed up */ 4960bcc099dSDavid Woodhouse if (jeb->free_size < waste) { 4971da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf(): Accounting error. wbuf at 0x%08x has 0x%03x bytes, 0x%03x left.\n", 4980bcc099dSDavid Woodhouse c->wbuf_ofs, c->wbuf_len, waste); 4991da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf(): But free_size for block at 0x%08x is only 0x%08x\n", 5001da177e4SLinus Torvalds jeb->offset, jeb->free_size); 5011da177e4SLinus Torvalds BUG(); 5021da177e4SLinus Torvalds } 5030bcc099dSDavid Woodhouse 5040bcc099dSDavid Woodhouse spin_lock(&c->erase_completion_lock); 5050bcc099dSDavid Woodhouse 5062f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, (c->wbuf_ofs + c->wbuf_len) | REF_OBSOLETE, waste, NULL); 5070bcc099dSDavid Woodhouse /* FIXME: that made it count as dirty. Convert to wasted */ 5080bcc099dSDavid Woodhouse jeb->dirty_size -= waste; 5090bcc099dSDavid Woodhouse c->dirty_size -= waste; 5100bcc099dSDavid Woodhouse jeb->wasted_size += waste; 5110bcc099dSDavid Woodhouse c->wasted_size += waste; 5120bcc099dSDavid Woodhouse } else 5130bcc099dSDavid Woodhouse spin_lock(&c->erase_completion_lock); 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds /* Stick any now-obsoleted blocks on the erase_pending_list */ 5161da177e4SLinus Torvalds jffs2_refile_wbuf_blocks(c); 5171da177e4SLinus Torvalds jffs2_clear_wbuf_ino_list(c); 5181da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 5191da177e4SLinus Torvalds 5201da177e4SLinus Torvalds memset(c->wbuf,0xff,c->wbuf_pagesize); 5211da177e4SLinus Torvalds /* adjust write buffer offset, else we get a non contiguous write bug */ 5221da177e4SLinus Torvalds c->wbuf_ofs += c->wbuf_pagesize; 5231da177e4SLinus Torvalds c->wbuf_len = 0; 5241da177e4SLinus Torvalds return 0; 5251da177e4SLinus Torvalds } 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds /* Trigger garbage collection to flush the write-buffer. 5281da177e4SLinus Torvalds If ino arg is zero, do it if _any_ real (i.e. not GC) writes are 5291da177e4SLinus Torvalds outstanding. If ino arg non-zero, do it only if a write for the 5301da177e4SLinus Torvalds given inode is outstanding. */ 5311da177e4SLinus Torvalds int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino) 5321da177e4SLinus Torvalds { 5331da177e4SLinus Torvalds uint32_t old_wbuf_ofs; 5341da177e4SLinus Torvalds uint32_t old_wbuf_len; 5351da177e4SLinus Torvalds int ret = 0; 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() called for ino #%u...\n", ino)); 5381da177e4SLinus Torvalds 5398aee6ac1SDavid Woodhouse if (!c->wbuf) 5408aee6ac1SDavid Woodhouse return 0; 5418aee6ac1SDavid Woodhouse 5421da177e4SLinus Torvalds down(&c->alloc_sem); 5431da177e4SLinus Torvalds if (!jffs2_wbuf_pending_for_ino(c, ino)) { 5441da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Ino #%d not pending in wbuf. Returning\n", ino)); 5451da177e4SLinus Torvalds up(&c->alloc_sem); 5461da177e4SLinus Torvalds return 0; 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds old_wbuf_ofs = c->wbuf_ofs; 5501da177e4SLinus Torvalds old_wbuf_len = c->wbuf_len; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds if (c->unchecked_size) { 5531da177e4SLinus Torvalds /* GC won't make any progress for a while */ 5541da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() padding. Not finished checking\n")); 5551da177e4SLinus Torvalds down_write(&c->wbuf_sem); 5561da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5577f716cf3SEstelle Hammache /* retry flushing wbuf in case jffs2_wbuf_recover 5587f716cf3SEstelle Hammache left some data in the wbuf */ 5597f716cf3SEstelle Hammache if (ret) 5607f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5611da177e4SLinus Torvalds up_write(&c->wbuf_sem); 5621da177e4SLinus Torvalds } else while (old_wbuf_len && 5631da177e4SLinus Torvalds old_wbuf_ofs == c->wbuf_ofs) { 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds up(&c->alloc_sem); 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() calls gc pass\n")); 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds ret = jffs2_garbage_collect_pass(c); 5701da177e4SLinus Torvalds if (ret) { 5711da177e4SLinus Torvalds /* GC failed. Flush it with padding instead */ 5721da177e4SLinus Torvalds down(&c->alloc_sem); 5731da177e4SLinus Torvalds down_write(&c->wbuf_sem); 5741da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5757f716cf3SEstelle Hammache /* retry flushing wbuf in case jffs2_wbuf_recover 5767f716cf3SEstelle Hammache left some data in the wbuf */ 5777f716cf3SEstelle Hammache if (ret) 5787f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5791da177e4SLinus Torvalds up_write(&c->wbuf_sem); 5801da177e4SLinus Torvalds break; 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds down(&c->alloc_sem); 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() ends...\n")); 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds up(&c->alloc_sem); 5881da177e4SLinus Torvalds return ret; 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds /* Pad write-buffer to end and write it, wasting space. */ 5921da177e4SLinus Torvalds int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c) 5931da177e4SLinus Torvalds { 5941da177e4SLinus Torvalds int ret; 5951da177e4SLinus Torvalds 5968aee6ac1SDavid Woodhouse if (!c->wbuf) 5978aee6ac1SDavid Woodhouse return 0; 5988aee6ac1SDavid Woodhouse 5991da177e4SLinus Torvalds down_write(&c->wbuf_sem); 6001da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 6017f716cf3SEstelle Hammache /* retry - maybe wbuf recover left some data in wbuf. */ 6027f716cf3SEstelle Hammache if (ret) 6037f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 6041da177e4SLinus Torvalds up_write(&c->wbuf_sem); 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds return ret; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 609dcb09328SThomas Gleixner static size_t jffs2_fill_wbuf(struct jffs2_sb_info *c, const uint8_t *buf, 610dcb09328SThomas Gleixner size_t len) 611dcb09328SThomas Gleixner { 612dcb09328SThomas Gleixner if (len && !c->wbuf_len && (len >= c->wbuf_pagesize)) 613dcb09328SThomas Gleixner return 0; 614dcb09328SThomas Gleixner 615dcb09328SThomas Gleixner if (len > (c->wbuf_pagesize - c->wbuf_len)) 616dcb09328SThomas Gleixner len = c->wbuf_pagesize - c->wbuf_len; 617dcb09328SThomas Gleixner memcpy(c->wbuf + c->wbuf_len, buf, len); 618dcb09328SThomas Gleixner c->wbuf_len += (uint32_t) len; 619dcb09328SThomas Gleixner return len; 620dcb09328SThomas Gleixner } 621dcb09328SThomas Gleixner 622dcb09328SThomas Gleixner int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, 623dcb09328SThomas Gleixner unsigned long count, loff_t to, size_t *retlen, 624dcb09328SThomas Gleixner uint32_t ino) 625dcb09328SThomas Gleixner { 626dcb09328SThomas Gleixner struct jffs2_eraseblock *jeb; 627dcb09328SThomas Gleixner size_t wbuf_retlen, donelen = 0; 628dcb09328SThomas Gleixner uint32_t outvec_to = to; 629dcb09328SThomas Gleixner int ret, invec; 630dcb09328SThomas Gleixner 631dcb09328SThomas Gleixner /* If not writebuffered flash, don't bother */ 6323be36675SAndrew Victor if (!jffs2_is_writebuffered(c)) 6331da177e4SLinus Torvalds return jffs2_flash_direct_writev(c, invecs, count, to, retlen); 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds down_write(&c->wbuf_sem); 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds /* If wbuf_ofs is not initialized, set it to target address */ 6381da177e4SLinus Torvalds if (c->wbuf_ofs == 0xFFFFFFFF) { 6391da177e4SLinus Torvalds c->wbuf_ofs = PAGE_DIV(to); 6401da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6411da177e4SLinus Torvalds memset(c->wbuf,0xff,c->wbuf_pagesize); 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds 644dcb09328SThomas Gleixner /* 645dcb09328SThomas Gleixner * Sanity checks on target address. It's permitted to write 646dcb09328SThomas Gleixner * at PAD(c->wbuf_len+c->wbuf_ofs), and it's permitted to 647dcb09328SThomas Gleixner * write at the beginning of a new erase block. Anything else, 648dcb09328SThomas Gleixner * and you die. New block starts at xxx000c (0-b = block 649dcb09328SThomas Gleixner * header) 6501da177e4SLinus Torvalds */ 6513be36675SAndrew Victor if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) { 6521da177e4SLinus Torvalds /* It's a write to a new block */ 6531da177e4SLinus Torvalds if (c->wbuf_len) { 654dcb09328SThomas Gleixner D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx " 655dcb09328SThomas Gleixner "causes flush of wbuf at 0x%08x\n", 656dcb09328SThomas Gleixner (unsigned long)to, c->wbuf_ofs)); 6571da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 658dcb09328SThomas Gleixner if (ret) 659dcb09328SThomas Gleixner goto outerr; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds /* set pointer to new block */ 6621da177e4SLinus Torvalds c->wbuf_ofs = PAGE_DIV(to); 6631da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6641da177e4SLinus Torvalds } 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds if (to != PAD(c->wbuf_ofs + c->wbuf_len)) { 6671da177e4SLinus Torvalds /* We're not writing immediately after the writebuffer. Bad. */ 668dcb09328SThomas Gleixner printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write " 669dcb09328SThomas Gleixner "to %08lx\n", (unsigned long)to); 6701da177e4SLinus Torvalds if (c->wbuf_len) 6711da177e4SLinus Torvalds printk(KERN_CRIT "wbuf was previously %08x-%08x\n", 6721da177e4SLinus Torvalds c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len); 6731da177e4SLinus Torvalds BUG(); 6741da177e4SLinus Torvalds } 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds /* adjust alignment offset */ 6771da177e4SLinus Torvalds if (c->wbuf_len != PAGE_MOD(to)) { 6781da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6791da177e4SLinus Torvalds /* take care of alignment to next page */ 680dcb09328SThomas Gleixner if (!c->wbuf_len) { 6811da177e4SLinus Torvalds c->wbuf_len = c->wbuf_pagesize; 6821da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, NOPAD); 683dcb09328SThomas Gleixner if (ret) 684dcb09328SThomas Gleixner goto outerr; 6851da177e4SLinus Torvalds } 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds 688dcb09328SThomas Gleixner for (invec = 0; invec < count; invec++) { 689dcb09328SThomas Gleixner int vlen = invecs[invec].iov_len; 690dcb09328SThomas Gleixner uint8_t *v = invecs[invec].iov_base; 6911da177e4SLinus Torvalds 692dcb09328SThomas Gleixner wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); 6931da177e4SLinus Torvalds 694dcb09328SThomas Gleixner if (c->wbuf_len == c->wbuf_pagesize) { 695dcb09328SThomas Gleixner ret = __jffs2_flush_wbuf(c, NOPAD); 696dcb09328SThomas Gleixner if (ret) 697dcb09328SThomas Gleixner goto outerr; 6981da177e4SLinus Torvalds } 699dcb09328SThomas Gleixner vlen -= wbuf_retlen; 700dcb09328SThomas Gleixner outvec_to += wbuf_retlen; 7011da177e4SLinus Torvalds donelen += wbuf_retlen; 702dcb09328SThomas Gleixner v += wbuf_retlen; 7031da177e4SLinus Torvalds 704dcb09328SThomas Gleixner if (vlen >= c->wbuf_pagesize) { 705dcb09328SThomas Gleixner ret = c->mtd->write(c->mtd, outvec_to, PAGE_DIV(vlen), 706dcb09328SThomas Gleixner &wbuf_retlen, v); 707dcb09328SThomas Gleixner if (ret < 0 || wbuf_retlen != PAGE_DIV(vlen)) 708dcb09328SThomas Gleixner goto outfile; 709dcb09328SThomas Gleixner 710dcb09328SThomas Gleixner vlen -= wbuf_retlen; 711dcb09328SThomas Gleixner outvec_to += wbuf_retlen; 712dcb09328SThomas Gleixner c->wbuf_ofs = outvec_to; 713dcb09328SThomas Gleixner donelen += wbuf_retlen; 714dcb09328SThomas Gleixner v += wbuf_retlen; 7151da177e4SLinus Torvalds } 7161da177e4SLinus Torvalds 717dcb09328SThomas Gleixner wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); 718dcb09328SThomas Gleixner if (c->wbuf_len == c->wbuf_pagesize) { 719dcb09328SThomas Gleixner ret = __jffs2_flush_wbuf(c, NOPAD); 720dcb09328SThomas Gleixner if (ret) 721dcb09328SThomas Gleixner goto outerr; 7221da177e4SLinus Torvalds } 7231da177e4SLinus Torvalds 724dcb09328SThomas Gleixner outvec_to += wbuf_retlen; 725dcb09328SThomas Gleixner donelen += wbuf_retlen; 7261da177e4SLinus Torvalds } 7271da177e4SLinus Torvalds 728dcb09328SThomas Gleixner /* 729dcb09328SThomas Gleixner * If there's a remainder in the wbuf and it's a non-GC write, 730dcb09328SThomas Gleixner * remember that the wbuf affects this ino 731dcb09328SThomas Gleixner */ 7321da177e4SLinus Torvalds *retlen = donelen; 7331da177e4SLinus Torvalds 734e631ddbaSFerenc Havasi if (jffs2_sum_active()) { 735e631ddbaSFerenc Havasi int res = jffs2_sum_add_kvec(c, invecs, count, (uint32_t) to); 736e631ddbaSFerenc Havasi if (res) 737e631ddbaSFerenc Havasi return res; 738e631ddbaSFerenc Havasi } 739e631ddbaSFerenc Havasi 7401da177e4SLinus Torvalds if (c->wbuf_len && ino) 7411da177e4SLinus Torvalds jffs2_wbuf_dirties_inode(c, ino); 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds ret = 0; 744dcb09328SThomas Gleixner up_write(&c->wbuf_sem); 745dcb09328SThomas Gleixner return ret; 7461da177e4SLinus Torvalds 747dcb09328SThomas Gleixner outfile: 748dcb09328SThomas Gleixner /* 749dcb09328SThomas Gleixner * At this point we have no problem, c->wbuf is empty. However 750dcb09328SThomas Gleixner * refile nextblock to avoid writing again to same address. 751dcb09328SThomas Gleixner */ 752dcb09328SThomas Gleixner 753dcb09328SThomas Gleixner spin_lock(&c->erase_completion_lock); 754dcb09328SThomas Gleixner 755dcb09328SThomas Gleixner jeb = &c->blocks[outvec_to / c->sector_size]; 756dcb09328SThomas Gleixner jffs2_block_refile(c, jeb, REFILE_ANYWAY); 757dcb09328SThomas Gleixner 758dcb09328SThomas Gleixner spin_unlock(&c->erase_completion_lock); 759dcb09328SThomas Gleixner 760dcb09328SThomas Gleixner outerr: 761dcb09328SThomas Gleixner *retlen = 0; 7621da177e4SLinus Torvalds up_write(&c->wbuf_sem); 7631da177e4SLinus Torvalds return ret; 7641da177e4SLinus Torvalds } 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds /* 7671da177e4SLinus Torvalds * This is the entry for flash write. 7681da177e4SLinus Torvalds * Check, if we work on NAND FLASH, if so build an kvec and write it via vritev 7691da177e4SLinus Torvalds */ 7701da177e4SLinus Torvalds int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf) 7711da177e4SLinus Torvalds { 7721da177e4SLinus Torvalds struct kvec vecs[1]; 7731da177e4SLinus Torvalds 7743be36675SAndrew Victor if (!jffs2_is_writebuffered(c)) 775e631ddbaSFerenc Havasi return jffs2_flash_direct_write(c, ofs, len, retlen, buf); 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds vecs[0].iov_base = (unsigned char *) buf; 7781da177e4SLinus Torvalds vecs[0].iov_len = len; 7791da177e4SLinus Torvalds return jffs2_flash_writev(c, vecs, 1, ofs, retlen, 0); 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds /* 7831da177e4SLinus Torvalds Handle readback from writebuffer and ECC failure return 7841da177e4SLinus Torvalds */ 7851da177e4SLinus Torvalds int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf) 7861da177e4SLinus Torvalds { 7871da177e4SLinus Torvalds loff_t orbf = 0, owbf = 0, lwbf = 0; 7881da177e4SLinus Torvalds int ret; 7891da177e4SLinus Torvalds 7903be36675SAndrew Victor if (!jffs2_is_writebuffered(c)) 7913be36675SAndrew Victor return c->mtd->read(c->mtd, ofs, len, retlen, buf); 7921da177e4SLinus Torvalds 7933be36675SAndrew Victor /* Read flash */ 794894214d1SArtem B. Bityuckiy down_read(&c->wbuf_sem); 7951da177e4SLinus Torvalds if (jffs2_cleanmarker_oob(c)) 7961da177e4SLinus Torvalds ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo); 7971da177e4SLinus Torvalds else 7981da177e4SLinus Torvalds ret = c->mtd->read(c->mtd, ofs, len, retlen, buf); 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds if ( (ret == -EBADMSG) && (*retlen == len) ) { 8011da177e4SLinus Torvalds printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n", 8021da177e4SLinus Torvalds len, ofs); 8031da177e4SLinus Torvalds /* 8041da177e4SLinus Torvalds * We have the raw data without ECC correction in the buffer, maybe 8051da177e4SLinus Torvalds * we are lucky and all data or parts are correct. We check the node. 8061da177e4SLinus Torvalds * If data are corrupted node check will sort it out. 8071da177e4SLinus Torvalds * We keep this block, it will fail on write or erase and the we 8081da177e4SLinus Torvalds * mark it bad. Or should we do that now? But we should give him a chance. 8091da177e4SLinus Torvalds * Maybe we had a system crash or power loss before the ecc write or 8101da177e4SLinus Torvalds * a erase was completed. 8111da177e4SLinus Torvalds * So we return success. :) 8121da177e4SLinus Torvalds */ 8131da177e4SLinus Torvalds ret = 0; 8141da177e4SLinus Torvalds } 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds /* if no writebuffer available or write buffer empty, return */ 8171da177e4SLinus Torvalds if (!c->wbuf_pagesize || !c->wbuf_len) 818894214d1SArtem B. Bityuckiy goto exit; 8191da177e4SLinus Torvalds 8201da177e4SLinus Torvalds /* if we read in a different block, return */ 8213be36675SAndrew Victor if (SECTOR_ADDR(ofs) != SECTOR_ADDR(c->wbuf_ofs)) 822894214d1SArtem B. Bityuckiy goto exit; 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvalds if (ofs >= c->wbuf_ofs) { 8251da177e4SLinus Torvalds owbf = (ofs - c->wbuf_ofs); /* offset in write buffer */ 8261da177e4SLinus Torvalds if (owbf > c->wbuf_len) /* is read beyond write buffer ? */ 8271da177e4SLinus Torvalds goto exit; 8281da177e4SLinus Torvalds lwbf = c->wbuf_len - owbf; /* number of bytes to copy */ 8291da177e4SLinus Torvalds if (lwbf > len) 8301da177e4SLinus Torvalds lwbf = len; 8311da177e4SLinus Torvalds } else { 8321da177e4SLinus Torvalds orbf = (c->wbuf_ofs - ofs); /* offset in read buffer */ 8331da177e4SLinus Torvalds if (orbf > len) /* is write beyond write buffer ? */ 8341da177e4SLinus Torvalds goto exit; 8351da177e4SLinus Torvalds lwbf = len - orbf; /* number of bytes to copy */ 8361da177e4SLinus Torvalds if (lwbf > c->wbuf_len) 8371da177e4SLinus Torvalds lwbf = c->wbuf_len; 8381da177e4SLinus Torvalds } 8391da177e4SLinus Torvalds if (lwbf > 0) 8401da177e4SLinus Torvalds memcpy(buf+orbf,c->wbuf+owbf,lwbf); 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds exit: 8431da177e4SLinus Torvalds up_read(&c->wbuf_sem); 8441da177e4SLinus Torvalds return ret; 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds /* 8481da177e4SLinus Torvalds * Check, if the out of band area is empty 8491da177e4SLinus Torvalds */ 8501da177e4SLinus Torvalds int jffs2_check_oob_empty( struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int mode) 8511da177e4SLinus Torvalds { 8521da177e4SLinus Torvalds unsigned char *buf; 8531da177e4SLinus Torvalds int ret = 0; 8541da177e4SLinus Torvalds int i,len,page; 8551da177e4SLinus Torvalds size_t retlen; 8561da177e4SLinus Torvalds int oob_size; 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvalds /* allocate a buffer for all oob data in this sector */ 8591da177e4SLinus Torvalds oob_size = c->mtd->oobsize; 8601da177e4SLinus Torvalds len = 4 * oob_size; 8611da177e4SLinus Torvalds buf = kmalloc(len, GFP_KERNEL); 8621da177e4SLinus Torvalds if (!buf) { 8631da177e4SLinus Torvalds printk(KERN_NOTICE "jffs2_check_oob_empty(): allocation of temporary data buffer for oob check failed\n"); 8641da177e4SLinus Torvalds return -ENOMEM; 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds /* 8671da177e4SLinus Torvalds * if mode = 0, we scan for a total empty oob area, else we have 8681da177e4SLinus Torvalds * to take care of the cleanmarker in the first page of the block 8691da177e4SLinus Torvalds */ 8701da177e4SLinus Torvalds ret = jffs2_flash_read_oob(c, jeb->offset, len , &retlen, buf); 8711da177e4SLinus Torvalds if (ret) { 8721da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB failed %d for block at %08x\n", ret, jeb->offset)); 8731da177e4SLinus Torvalds goto out; 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds if (retlen < len) { 8771da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB return short read " 8781da177e4SLinus Torvalds "(%zd bytes not %d) for block at %08x\n", retlen, len, jeb->offset)); 8791da177e4SLinus Torvalds ret = -EIO; 8801da177e4SLinus Torvalds goto out; 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds /* Special check for first page */ 8841da177e4SLinus Torvalds for(i = 0; i < oob_size ; i++) { 8851da177e4SLinus Torvalds /* Yeah, we know about the cleanmarker. */ 8861da177e4SLinus Torvalds if (mode && i >= c->fsdata_pos && 8871da177e4SLinus Torvalds i < c->fsdata_pos + c->fsdata_len) 8881da177e4SLinus Torvalds continue; 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds if (buf[i] != 0xFF) { 8911da177e4SLinus Torvalds D2(printk(KERN_DEBUG "Found %02x at %x in OOB for %08x\n", 892730554d9SArtem B. Bityutskiy buf[i], i, jeb->offset)); 8931da177e4SLinus Torvalds ret = 1; 8941da177e4SLinus Torvalds goto out; 8951da177e4SLinus Torvalds } 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds /* we know, we are aligned :) */ 8991da177e4SLinus Torvalds for (page = oob_size; page < len; page += sizeof(long)) { 9001da177e4SLinus Torvalds unsigned long dat = *(unsigned long *)(&buf[page]); 9011da177e4SLinus Torvalds if(dat != -1) { 9021da177e4SLinus Torvalds ret = 1; 9031da177e4SLinus Torvalds goto out; 9041da177e4SLinus Torvalds } 9051da177e4SLinus Torvalds } 9061da177e4SLinus Torvalds 9071da177e4SLinus Torvalds out: 9081da177e4SLinus Torvalds kfree(buf); 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds return ret; 9111da177e4SLinus Torvalds } 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds /* 9141da177e4SLinus Torvalds * Scan for a valid cleanmarker and for bad blocks 9151da177e4SLinus Torvalds * For virtual blocks (concatenated physical blocks) check the cleanmarker 9161da177e4SLinus Torvalds * only in the first page of the first physical block, but scan for bad blocks in all 9171da177e4SLinus Torvalds * physical blocks 9181da177e4SLinus Torvalds */ 9191da177e4SLinus Torvalds int jffs2_check_nand_cleanmarker (struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) 9201da177e4SLinus Torvalds { 9211da177e4SLinus Torvalds struct jffs2_unknown_node n; 9221da177e4SLinus Torvalds unsigned char buf[2 * NAND_MAX_OOBSIZE]; 9231da177e4SLinus Torvalds unsigned char *p; 9241da177e4SLinus Torvalds int ret, i, cnt, retval = 0; 9251da177e4SLinus Torvalds size_t retlen, offset; 9261da177e4SLinus Torvalds int oob_size; 9271da177e4SLinus Torvalds 9281da177e4SLinus Torvalds offset = jeb->offset; 9291da177e4SLinus Torvalds oob_size = c->mtd->oobsize; 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds /* Loop through the physical blocks */ 9321da177e4SLinus Torvalds for (cnt = 0; cnt < (c->sector_size / c->mtd->erasesize); cnt++) { 9331da177e4SLinus Torvalds /* Check first if the block is bad. */ 9341da177e4SLinus Torvalds if (c->mtd->block_isbad (c->mtd, offset)) { 9351da177e4SLinus Torvalds D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Bad block at %08x\n", jeb->offset)); 9361da177e4SLinus Torvalds return 2; 9371da177e4SLinus Torvalds } 9381da177e4SLinus Torvalds /* 9391da177e4SLinus Torvalds * We read oob data from page 0 and 1 of the block. 9401da177e4SLinus Torvalds * page 0 contains cleanmarker and badblock info 9411da177e4SLinus Torvalds * page 1 contains failure count of this block 9421da177e4SLinus Torvalds */ 9431da177e4SLinus Torvalds ret = c->mtd->read_oob (c->mtd, offset, oob_size << 1, &retlen, buf); 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds if (ret) { 9461da177e4SLinus Torvalds D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Read OOB failed %d for block at %08x\n", ret, jeb->offset)); 9471da177e4SLinus Torvalds return ret; 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds if (retlen < (oob_size << 1)) { 9501da177e4SLinus Torvalds 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)); 9511da177e4SLinus Torvalds return -EIO; 9521da177e4SLinus Torvalds } 9531da177e4SLinus Torvalds 9541da177e4SLinus Torvalds /* Check cleanmarker only on the first physical block */ 9551da177e4SLinus Torvalds if (!cnt) { 9561da177e4SLinus Torvalds n.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK); 9571da177e4SLinus Torvalds n.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER); 9581da177e4SLinus Torvalds n.totlen = cpu_to_je32 (8); 9591da177e4SLinus Torvalds p = (unsigned char *) &n; 9601da177e4SLinus Torvalds 9611da177e4SLinus Torvalds for (i = 0; i < c->fsdata_len; i++) { 9621da177e4SLinus Torvalds if (buf[c->fsdata_pos + i] != p[i]) { 9631da177e4SLinus Torvalds retval = 1; 9641da177e4SLinus Torvalds } 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds D1(if (retval == 1) { 9671da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_check_nand_cleanmarker(): Cleanmarker node not detected in block at %08x\n", jeb->offset); 9681da177e4SLinus Torvalds printk(KERN_WARNING "OOB at %08x was ", offset); 9691da177e4SLinus Torvalds for (i=0; i < oob_size; i++) { 9701da177e4SLinus Torvalds printk("%02x ", buf[i]); 9711da177e4SLinus Torvalds } 9721da177e4SLinus Torvalds printk("\n"); 9731da177e4SLinus Torvalds }) 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds offset += c->mtd->erasesize; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds return retval; 9781da177e4SLinus Torvalds } 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) 9811da177e4SLinus Torvalds { 9821da177e4SLinus Torvalds struct jffs2_unknown_node n; 9831da177e4SLinus Torvalds int ret; 9841da177e4SLinus Torvalds size_t retlen; 9851da177e4SLinus Torvalds 9861da177e4SLinus Torvalds n.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 9871da177e4SLinus Torvalds n.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER); 9881da177e4SLinus Torvalds n.totlen = cpu_to_je32(8); 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds ret = jffs2_flash_write_oob(c, jeb->offset + c->fsdata_pos, c->fsdata_len, &retlen, (unsigned char *)&n); 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds if (ret) { 9931da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Write failed for block at %08x: error %d\n", jeb->offset, ret)); 9941da177e4SLinus Torvalds return ret; 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds if (retlen != c->fsdata_len) { 9971da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Short write for block at %08x: %zd not %d\n", jeb->offset, retlen, c->fsdata_len)); 9981da177e4SLinus Torvalds return ret; 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds return 0; 10011da177e4SLinus Torvalds } 10021da177e4SLinus Torvalds 10031da177e4SLinus Torvalds /* 10041da177e4SLinus Torvalds * On NAND we try to mark this block bad. If the block was erased more 10051da177e4SLinus Torvalds * than MAX_ERASE_FAILURES we mark it finaly bad. 10061da177e4SLinus Torvalds * Don't care about failures. This block remains on the erase-pending 10071da177e4SLinus Torvalds * or badblock list as long as nobody manipulates the flash with 10081da177e4SLinus Torvalds * a bootloader or something like that. 10091da177e4SLinus Torvalds */ 10101da177e4SLinus Torvalds 10111da177e4SLinus Torvalds int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset) 10121da177e4SLinus Torvalds { 10131da177e4SLinus Torvalds int ret; 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds /* if the count is < max, we try to write the counter to the 2nd page oob area */ 10161da177e4SLinus Torvalds if( ++jeb->bad_count < MAX_ERASE_FAILURES) 10171da177e4SLinus Torvalds return 0; 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds if (!c->mtd->block_markbad) 10201da177e4SLinus Torvalds return 1; // What else can we do? 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Marking bad block at %08x\n", bad_offset)); 10231da177e4SLinus Torvalds ret = c->mtd->block_markbad(c->mtd, bad_offset); 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds if (ret) { 10261da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Write failed for block at %08x: error %d\n", jeb->offset, ret)); 10271da177e4SLinus Torvalds return ret; 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds return 1; 10301da177e4SLinus Torvalds } 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds #define NAND_JFFS2_OOB16_FSDALEN 8 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds static struct nand_oobinfo jffs2_oobinfo_docecc = { 10351da177e4SLinus Torvalds .useecc = MTD_NANDECC_PLACE, 10361da177e4SLinus Torvalds .eccbytes = 6, 10371da177e4SLinus Torvalds .eccpos = {0,1,2,3,4,5} 10381da177e4SLinus Torvalds }; 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds static int jffs2_nand_set_oobinfo(struct jffs2_sb_info *c) 10421da177e4SLinus Torvalds { 10431da177e4SLinus Torvalds struct nand_oobinfo *oinfo = &c->mtd->oobinfo; 10441da177e4SLinus Torvalds 10451da177e4SLinus Torvalds /* Do this only, if we have an oob buffer */ 10461da177e4SLinus Torvalds if (!c->mtd->oobsize) 10471da177e4SLinus Torvalds return 0; 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds /* Cleanmarker is out-of-band, so inline size zero */ 10501da177e4SLinus Torvalds c->cleanmarker_size = 0; 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds /* Should we use autoplacement ? */ 10531da177e4SLinus Torvalds if (oinfo && oinfo->useecc == MTD_NANDECC_AUTOPLACE) { 10541da177e4SLinus Torvalds D1(printk(KERN_DEBUG "JFFS2 using autoplace on NAND\n")); 10551da177e4SLinus Torvalds /* Get the position of the free bytes */ 10561da177e4SLinus Torvalds if (!oinfo->oobfree[0][1]) { 10571da177e4SLinus Torvalds printk (KERN_WARNING "jffs2_nand_set_oobinfo(): Eeep. Autoplacement selected and no empty space in oob\n"); 10581da177e4SLinus Torvalds return -ENOSPC; 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds c->fsdata_pos = oinfo->oobfree[0][0]; 10611da177e4SLinus Torvalds c->fsdata_len = oinfo->oobfree[0][1]; 10621da177e4SLinus Torvalds if (c->fsdata_len > 8) 10631da177e4SLinus Torvalds c->fsdata_len = 8; 10641da177e4SLinus Torvalds } else { 10651da177e4SLinus Torvalds /* This is just a legacy fallback and should go away soon */ 10661da177e4SLinus Torvalds switch(c->mtd->ecctype) { 10671da177e4SLinus Torvalds case MTD_ECC_RS_DiskOnChip: 10681da177e4SLinus Torvalds printk(KERN_WARNING "JFFS2 using DiskOnChip hardware ECC without autoplacement. Fix it!\n"); 10691da177e4SLinus Torvalds c->oobinfo = &jffs2_oobinfo_docecc; 10701da177e4SLinus Torvalds c->fsdata_pos = 6; 10711da177e4SLinus Torvalds c->fsdata_len = NAND_JFFS2_OOB16_FSDALEN; 10721da177e4SLinus Torvalds c->badblock_pos = 15; 10731da177e4SLinus Torvalds break; 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds default: 10761da177e4SLinus Torvalds D1(printk(KERN_DEBUG "JFFS2 on NAND. No autoplacment info found\n")); 10771da177e4SLinus Torvalds return -EINVAL; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds return 0; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds int jffs2_nand_flash_setup(struct jffs2_sb_info *c) 10841da177e4SLinus Torvalds { 10851da177e4SLinus Torvalds int res; 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds /* Initialise write buffer */ 10881da177e4SLinus Torvalds init_rwsem(&c->wbuf_sem); 108928318776SJoern Engel c->wbuf_pagesize = c->mtd->writesize; 10901da177e4SLinus Torvalds c->wbuf_ofs = 0xFFFFFFFF; 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 10931da177e4SLinus Torvalds if (!c->wbuf) 10941da177e4SLinus Torvalds return -ENOMEM; 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds res = jffs2_nand_set_oobinfo(c); 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds #ifdef BREAKME 10991da177e4SLinus Torvalds if (!brokenbuf) 11001da177e4SLinus Torvalds brokenbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 11011da177e4SLinus Torvalds if (!brokenbuf) { 11021da177e4SLinus Torvalds kfree(c->wbuf); 11031da177e4SLinus Torvalds return -ENOMEM; 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds memset(brokenbuf, 0xdb, c->wbuf_pagesize); 11061da177e4SLinus Torvalds #endif 11071da177e4SLinus Torvalds return res; 11081da177e4SLinus Torvalds } 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c) 11111da177e4SLinus Torvalds { 11121da177e4SLinus Torvalds kfree(c->wbuf); 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds 11158f15fd55SAndrew Victor int jffs2_dataflash_setup(struct jffs2_sb_info *c) { 11168f15fd55SAndrew Victor c->cleanmarker_size = 0; /* No cleanmarkers needed */ 11178f15fd55SAndrew Victor 11188f15fd55SAndrew Victor /* Initialize write buffer */ 11198f15fd55SAndrew Victor init_rwsem(&c->wbuf_sem); 11208f15fd55SAndrew Victor 1121daba5cc4SArtem B. Bityutskiy 1122daba5cc4SArtem B. Bityutskiy c->wbuf_pagesize = c->mtd->erasesize; 1123daba5cc4SArtem B. Bityutskiy 1124daba5cc4SArtem B. Bityutskiy /* Find a suitable c->sector_size 1125daba5cc4SArtem B. Bityutskiy * - Not too much sectors 1126daba5cc4SArtem B. Bityutskiy * - Sectors have to be at least 4 K + some bytes 1127daba5cc4SArtem B. Bityutskiy * - All known dataflashes have erase sizes of 528 or 1056 1128daba5cc4SArtem B. Bityutskiy * - we take at least 8 eraseblocks and want to have at least 8K size 1129daba5cc4SArtem B. Bityutskiy * - The concatenation should be a power of 2 1130daba5cc4SArtem B. Bityutskiy */ 1131daba5cc4SArtem B. Bityutskiy 1132daba5cc4SArtem B. Bityutskiy c->sector_size = 8 * c->mtd->erasesize; 1133daba5cc4SArtem B. Bityutskiy 1134daba5cc4SArtem B. Bityutskiy while (c->sector_size < 8192) { 1135daba5cc4SArtem B. Bityutskiy c->sector_size *= 2; 1136daba5cc4SArtem B. Bityutskiy } 1137daba5cc4SArtem B. Bityutskiy 1138daba5cc4SArtem B. Bityutskiy /* It may be necessary to adjust the flash size */ 1139daba5cc4SArtem B. Bityutskiy c->flash_size = c->mtd->size; 1140daba5cc4SArtem B. Bityutskiy 1141daba5cc4SArtem B. Bityutskiy if ((c->flash_size % c->sector_size) != 0) { 1142daba5cc4SArtem B. Bityutskiy c->flash_size = (c->flash_size / c->sector_size) * c->sector_size; 1143daba5cc4SArtem B. Bityutskiy printk(KERN_WARNING "JFFS2 flash size adjusted to %dKiB\n", c->flash_size); 1144daba5cc4SArtem B. Bityutskiy }; 1145daba5cc4SArtem B. Bityutskiy 1146daba5cc4SArtem B. Bityutskiy c->wbuf_ofs = 0xFFFFFFFF; 11478f15fd55SAndrew Victor c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 11488f15fd55SAndrew Victor if (!c->wbuf) 11498f15fd55SAndrew Victor return -ENOMEM; 11508f15fd55SAndrew Victor 1151daba5cc4SArtem B. Bityutskiy printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size); 11528f15fd55SAndrew Victor 11538f15fd55SAndrew Victor return 0; 11548f15fd55SAndrew Victor } 11558f15fd55SAndrew Victor 11568f15fd55SAndrew Victor void jffs2_dataflash_cleanup(struct jffs2_sb_info *c) { 11578f15fd55SAndrew Victor kfree(c->wbuf); 11588f15fd55SAndrew Victor } 11598f15fd55SAndrew Victor 116059da721aSNicolas Pitre int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) { 1161c8b229deSJoern Engel /* Cleanmarker currently occupies whole programming regions, 1162c8b229deSJoern Engel * either one or 2 for 8Byte STMicro flashes. */ 1163c8b229deSJoern Engel c->cleanmarker_size = max(16u, c->mtd->writesize); 116459da721aSNicolas Pitre 116559da721aSNicolas Pitre /* Initialize write buffer */ 116659da721aSNicolas Pitre init_rwsem(&c->wbuf_sem); 116728318776SJoern Engel c->wbuf_pagesize = c->mtd->writesize; 116859da721aSNicolas Pitre c->wbuf_ofs = 0xFFFFFFFF; 116959da721aSNicolas Pitre 117059da721aSNicolas Pitre c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 117159da721aSNicolas Pitre if (!c->wbuf) 117259da721aSNicolas Pitre return -ENOMEM; 117359da721aSNicolas Pitre 117459da721aSNicolas Pitre return 0; 117559da721aSNicolas Pitre } 117659da721aSNicolas Pitre 117759da721aSNicolas Pitre void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) { 117859da721aSNicolas Pitre kfree(c->wbuf); 117959da721aSNicolas Pitre } 1180