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 182046b8b98SDavid Woodhouse jeb = &c->blocks[c->wbuf_ofs / c->sector_size]; 183046b8b98SDavid Woodhouse 184046b8b98SDavid Woodhouse if (jffs2_prealloc_raw_node_refs(c, jeb, c->reserved_refs + 1)) 1852f785402SDavid Woodhouse return; 1862f785402SDavid Woodhouse 1871da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 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 ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf); 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds if (ret == -EBADMSG && retlen == c->wbuf_ofs - start) { 2421da177e4SLinus Torvalds /* ECC recovered */ 2431da177e4SLinus Torvalds ret = 0; 2441da177e4SLinus Torvalds } 2451da177e4SLinus Torvalds if (ret || retlen != c->wbuf_ofs - start) { 2461da177e4SLinus Torvalds printk(KERN_CRIT "Old data are already lost in wbuf recovery. Data loss ensues.\n"); 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds kfree(buf); 2491da177e4SLinus Torvalds buf = NULL; 2501da177e4SLinus Torvalds read_failed: 2511da177e4SLinus Torvalds first_raw = &(*first_raw)->next_phys; 2521da177e4SLinus Torvalds /* If this was the only node to be recovered, give up */ 2531da177e4SLinus Torvalds if (!(*first_raw)) 2541da177e4SLinus Torvalds return; 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds /* It wasn't. Go on and try to recover nodes complete in the wbuf */ 2571da177e4SLinus Torvalds start = ref_offset(*first_raw); 2581da177e4SLinus Torvalds } else { 2591da177e4SLinus Torvalds /* Read succeeded. Copy the remaining data from the wbuf */ 2601da177e4SLinus Torvalds memcpy(buf + (c->wbuf_ofs - start), c->wbuf, end - c->wbuf_ofs); 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds } 2631da177e4SLinus Torvalds /* OK... we're to rewrite (end-start) bytes of data from first_raw onwards. 2641da177e4SLinus Torvalds Either 'buf' contains the data, or we find it in the wbuf */ 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /* ... and get an allocation of space from a shiny new block instead */ 2689fe4854cSDavid Woodhouse ret = jffs2_reserve_space_gc(c, end-start, &len, JFFS2_SUMMARY_NOSUM_SIZE); 2691da177e4SLinus Torvalds if (ret) { 2701da177e4SLinus Torvalds printk(KERN_WARNING "Failed to allocate space for wbuf recovery. Data loss ensues.\n"); 2711da177e4SLinus Torvalds kfree(buf); 2721da177e4SLinus Torvalds return; 2731da177e4SLinus Torvalds } 2749fe4854cSDavid Woodhouse ofs = write_ofs(c); 2759fe4854cSDavid Woodhouse 2761da177e4SLinus Torvalds if (end-start >= c->wbuf_pagesize) { 2777f716cf3SEstelle Hammache /* Need to do another write immediately, but it's possible 2787f716cf3SEstelle Hammache that this is just because the wbuf itself is completely 2797f716cf3SEstelle Hammache full, and there's nothing earlier read back from the 2807f716cf3SEstelle Hammache flash. Hence 'buf' isn't necessarily what we're writing 2817f716cf3SEstelle Hammache from. */ 2827f716cf3SEstelle Hammache unsigned char *rewrite_buf = buf?:c->wbuf; 2831da177e4SLinus Torvalds uint32_t towrite = (end-start) - ((end-start)%c->wbuf_pagesize); 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Write 0x%x bytes at 0x%08x in wbuf recover\n", 2861da177e4SLinus Torvalds towrite, ofs)); 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds #ifdef BREAKMEHEADER 2891da177e4SLinus Torvalds static int breakme; 2901da177e4SLinus Torvalds if (breakme++ == 20) { 2911da177e4SLinus Torvalds printk(KERN_NOTICE "Faking write error at 0x%08x\n", ofs); 2921da177e4SLinus Torvalds breakme = 0; 2939223a456SThomas Gleixner c->mtd->write(c->mtd, ofs, towrite, &retlen, 2949223a456SThomas Gleixner brokenbuf); 2951da177e4SLinus Torvalds ret = -EIO; 2961da177e4SLinus Torvalds } else 2971da177e4SLinus Torvalds #endif 2989223a456SThomas Gleixner ret = c->mtd->write(c->mtd, ofs, towrite, &retlen, 2999223a456SThomas Gleixner rewrite_buf); 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if (ret || retlen != towrite) { 3021da177e4SLinus Torvalds /* Argh. We tried. Really we did. */ 3031da177e4SLinus Torvalds printk(KERN_CRIT "Recovery of wbuf failed due to a second write error\n"); 3041da177e4SLinus Torvalds kfree(buf); 3051da177e4SLinus Torvalds 3062f785402SDavid Woodhouse if (retlen) 3072f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, ofs | REF_OBSOLETE, ref_totlen(c, jeb, *first_raw), NULL); 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds return; 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds printk(KERN_NOTICE "Recovery of wbuf succeeded to %08x\n", ofs); 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds c->wbuf_len = (end - start) - towrite; 3141da177e4SLinus Torvalds c->wbuf_ofs = ofs + towrite; 3157f716cf3SEstelle Hammache memmove(c->wbuf, rewrite_buf + towrite, c->wbuf_len); 3161da177e4SLinus Torvalds /* Don't muck about with c->wbuf_inodes. False positives are harmless. */ 3171da177e4SLinus Torvalds kfree(buf); 3181da177e4SLinus Torvalds } else { 3191da177e4SLinus Torvalds /* OK, now we're left with the dregs in whichever buffer we're using */ 3201da177e4SLinus Torvalds if (buf) { 3211da177e4SLinus Torvalds memcpy(c->wbuf, buf, end-start); 3221da177e4SLinus Torvalds kfree(buf); 3231da177e4SLinus Torvalds } else { 3241da177e4SLinus Torvalds memmove(c->wbuf, c->wbuf + (start - c->wbuf_ofs), end - start); 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds c->wbuf_ofs = ofs; 3271da177e4SLinus Torvalds c->wbuf_len = end - start; 3281da177e4SLinus Torvalds } 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds /* Now sort out the jffs2_raw_node_refs, moving them from the old to the next block */ 3311da177e4SLinus Torvalds new_jeb = &c->blocks[ofs / c->sector_size]; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds spin_lock(&c->erase_completion_lock); 3341da177e4SLinus Torvalds if (new_jeb->first_node) { 3351da177e4SLinus Torvalds /* Odd, but possible with ST flash later maybe */ 3361da177e4SLinus Torvalds new_jeb->last_node->next_phys = *first_raw; 3371da177e4SLinus Torvalds } else { 3381da177e4SLinus Torvalds new_jeb->first_node = *first_raw; 3391da177e4SLinus Torvalds } 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds raw = first_raw; 3421da177e4SLinus Torvalds while (*raw) { 3431da177e4SLinus Torvalds uint32_t rawlen = ref_totlen(c, jeb, *raw); 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Refiling block of %08x at %08x(%d) to %08x\n", 3461da177e4SLinus Torvalds rawlen, ref_offset(*raw), ref_flags(*raw), ofs)); 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds if (ref_obsolete(*raw)) { 3491da177e4SLinus Torvalds /* Shouldn't really happen much */ 3501da177e4SLinus Torvalds new_jeb->dirty_size += rawlen; 3511da177e4SLinus Torvalds new_jeb->free_size -= rawlen; 3521da177e4SLinus Torvalds c->dirty_size += rawlen; 3531da177e4SLinus Torvalds } else { 3541da177e4SLinus Torvalds new_jeb->used_size += rawlen; 3551da177e4SLinus Torvalds new_jeb->free_size -= rawlen; 3561da177e4SLinus Torvalds jeb->dirty_size += rawlen; 3571da177e4SLinus Torvalds jeb->used_size -= rawlen; 3581da177e4SLinus Torvalds c->dirty_size += rawlen; 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds c->free_size -= rawlen; 3611da177e4SLinus Torvalds (*raw)->flash_offset = ofs | ref_flags(*raw); 3621da177e4SLinus Torvalds ofs += rawlen; 3631da177e4SLinus Torvalds new_jeb->last_node = *raw; 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds raw = &(*raw)->next_phys; 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds /* Fix up the original jeb now it's on the bad_list */ 3691da177e4SLinus Torvalds *first_raw = NULL; 3701da177e4SLinus Torvalds if (first_raw == &jeb->first_node) { 3711da177e4SLinus Torvalds jeb->last_node = NULL; 3721da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Failing block at %08x is now empty. Moving to erase_pending_list\n", jeb->offset)); 3731da177e4SLinus Torvalds list_del(&jeb->list); 3741da177e4SLinus Torvalds list_add(&jeb->list, &c->erase_pending_list); 3751da177e4SLinus Torvalds c->nr_erasing_blocks++; 3761da177e4SLinus Torvalds jffs2_erase_pending_trigger(c); 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds else 3791da177e4SLinus Torvalds jeb->last_node = container_of(first_raw, struct jffs2_raw_node_ref, next_phys); 3801da177e4SLinus Torvalds 381e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_sanity_check_nolock(c, jeb); 382e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check_nolock(c, jeb); 3831da177e4SLinus Torvalds 384e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_sanity_check_nolock(c, new_jeb); 385e0c8e42fSArtem B. Bityutskiy jffs2_dbg_acct_paranoia_check_nolock(c, new_jeb); 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds D1(printk(KERN_DEBUG "wbuf recovery completed OK\n")); 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds /* Meaning of pad argument: 3931da177e4SLinus Torvalds 0: Do not pad. Probably pointless - we only ever use this when we can't pad anyway. 3941da177e4SLinus Torvalds 1: Pad, do not adjust nextblock free_size 3951da177e4SLinus Torvalds 2: Pad, adjust nextblock free_size 3961da177e4SLinus Torvalds */ 3971da177e4SLinus Torvalds #define NOPAD 0 3981da177e4SLinus Torvalds #define PAD_NOACCOUNT 1 3991da177e4SLinus Torvalds #define PAD_ACCOUNTING 2 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad) 4021da177e4SLinus Torvalds { 4031da177e4SLinus Torvalds int ret; 4041da177e4SLinus Torvalds size_t retlen; 4051da177e4SLinus Torvalds 4063be36675SAndrew Victor /* Nothing to do if not write-buffering the flash. In particular, we shouldn't 4071da177e4SLinus Torvalds del_timer() the timer we never initialised. */ 4083be36675SAndrew Victor if (!jffs2_is_writebuffered(c)) 4091da177e4SLinus Torvalds return 0; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds if (!down_trylock(&c->alloc_sem)) { 4121da177e4SLinus Torvalds up(&c->alloc_sem); 4131da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf() called with alloc_sem not locked!\n"); 4141da177e4SLinus Torvalds BUG(); 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 4173be36675SAndrew Victor if (!c->wbuf_len) /* already checked c->wbuf above */ 4181da177e4SLinus Torvalds return 0; 4191da177e4SLinus Torvalds 420046b8b98SDavid Woodhouse if (jffs2_prealloc_raw_node_refs(c, c->nextblock, c->reserved_refs + 1)) 4212f785402SDavid Woodhouse return -ENOMEM; 4222f785402SDavid Woodhouse 4231da177e4SLinus Torvalds /* claim remaining space on the page 4241da177e4SLinus Torvalds this happens, if we have a change to a new block, 4251da177e4SLinus Torvalds or if fsync forces us to flush the writebuffer. 4261da177e4SLinus Torvalds if we have a switch to next page, we will not have 4271da177e4SLinus Torvalds enough remaining space for this. 4281da177e4SLinus Torvalds */ 429daba5cc4SArtem B. Bityutskiy if (pad ) { 4301da177e4SLinus Torvalds c->wbuf_len = PAD(c->wbuf_len); 4311da177e4SLinus Torvalds 4321da177e4SLinus Torvalds /* Pad with JFFS2_DIRTY_BITMASK initially. this helps out ECC'd NOR 4331da177e4SLinus Torvalds with 8 byte page size */ 4341da177e4SLinus Torvalds memset(c->wbuf + c->wbuf_len, 0, c->wbuf_pagesize - c->wbuf_len); 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds if ( c->wbuf_len + sizeof(struct jffs2_unknown_node) < c->wbuf_pagesize) { 4371da177e4SLinus Torvalds struct jffs2_unknown_node *padnode = (void *)(c->wbuf + c->wbuf_len); 4381da177e4SLinus Torvalds padnode->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 4391da177e4SLinus Torvalds padnode->nodetype = cpu_to_je16(JFFS2_NODETYPE_PADDING); 4401da177e4SLinus Torvalds padnode->totlen = cpu_to_je32(c->wbuf_pagesize - c->wbuf_len); 4411da177e4SLinus Torvalds padnode->hdr_crc = cpu_to_je32(crc32(0, padnode, sizeof(*padnode)-4)); 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds } 4441da177e4SLinus Torvalds /* else jffs2_flash_writev has actually filled in the rest of the 4451da177e4SLinus Torvalds buffer for us, and will deal with the node refs etc. later. */ 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds #ifdef BREAKME 4481da177e4SLinus Torvalds static int breakme; 4491da177e4SLinus Torvalds if (breakme++ == 20) { 4501da177e4SLinus Torvalds printk(KERN_NOTICE "Faking write error at 0x%08x\n", c->wbuf_ofs); 4511da177e4SLinus Torvalds breakme = 0; 4529223a456SThomas Gleixner c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, 4539223a456SThomas Gleixner brokenbuf); 4541da177e4SLinus Torvalds ret = -EIO; 4551da177e4SLinus Torvalds } else 4561da177e4SLinus Torvalds #endif 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds ret = c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf); 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds if (ret || retlen != c->wbuf_pagesize) { 4611da177e4SLinus Torvalds if (ret) 4621da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_flush_wbuf(): Write failed with %d\n",ret); 4631da177e4SLinus Torvalds else { 4641da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_flush_wbuf(): Write was short: %zd instead of %d\n", 4651da177e4SLinus Torvalds retlen, c->wbuf_pagesize); 4661da177e4SLinus Torvalds ret = -EIO; 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds jffs2_wbuf_recover(c); 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds return ret; 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds /* Adjust free size of the block if we padded. */ 475daba5cc4SArtem B. Bityutskiy if (pad) { 4761da177e4SLinus Torvalds struct jffs2_eraseblock *jeb; 4770bcc099dSDavid Woodhouse uint32_t waste = c->wbuf_pagesize - c->wbuf_len; 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds jeb = &c->blocks[c->wbuf_ofs / c->sector_size]; 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf() adjusting free_size of %sblock at %08x\n", 4821da177e4SLinus Torvalds (jeb==c->nextblock)?"next":"", jeb->offset)); 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds /* wbuf_pagesize - wbuf_len is the amount of space that's to be 4851da177e4SLinus Torvalds padded. If there is less free space in the block than that, 4861da177e4SLinus Torvalds something screwed up */ 4870bcc099dSDavid Woodhouse if (jeb->free_size < waste) { 4881da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf(): Accounting error. wbuf at 0x%08x has 0x%03x bytes, 0x%03x left.\n", 4890bcc099dSDavid Woodhouse c->wbuf_ofs, c->wbuf_len, waste); 4901da177e4SLinus Torvalds printk(KERN_CRIT "jffs2_flush_wbuf(): But free_size for block at 0x%08x is only 0x%08x\n", 4911da177e4SLinus Torvalds jeb->offset, jeb->free_size); 4921da177e4SLinus Torvalds BUG(); 4931da177e4SLinus Torvalds } 4940bcc099dSDavid Woodhouse 4950bcc099dSDavid Woodhouse spin_lock(&c->erase_completion_lock); 4960bcc099dSDavid Woodhouse 4972f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, (c->wbuf_ofs + c->wbuf_len) | REF_OBSOLETE, waste, NULL); 4980bcc099dSDavid Woodhouse /* FIXME: that made it count as dirty. Convert to wasted */ 4990bcc099dSDavid Woodhouse jeb->dirty_size -= waste; 5000bcc099dSDavid Woodhouse c->dirty_size -= waste; 5010bcc099dSDavid Woodhouse jeb->wasted_size += waste; 5020bcc099dSDavid Woodhouse c->wasted_size += waste; 5030bcc099dSDavid Woodhouse } else 5040bcc099dSDavid Woodhouse spin_lock(&c->erase_completion_lock); 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds /* Stick any now-obsoleted blocks on the erase_pending_list */ 5071da177e4SLinus Torvalds jffs2_refile_wbuf_blocks(c); 5081da177e4SLinus Torvalds jffs2_clear_wbuf_ino_list(c); 5091da177e4SLinus Torvalds spin_unlock(&c->erase_completion_lock); 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds memset(c->wbuf,0xff,c->wbuf_pagesize); 5121da177e4SLinus Torvalds /* adjust write buffer offset, else we get a non contiguous write bug */ 5131da177e4SLinus Torvalds c->wbuf_ofs += c->wbuf_pagesize; 5141da177e4SLinus Torvalds c->wbuf_len = 0; 5151da177e4SLinus Torvalds return 0; 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds /* Trigger garbage collection to flush the write-buffer. 5191da177e4SLinus Torvalds If ino arg is zero, do it if _any_ real (i.e. not GC) writes are 5201da177e4SLinus Torvalds outstanding. If ino arg non-zero, do it only if a write for the 5211da177e4SLinus Torvalds given inode is outstanding. */ 5221da177e4SLinus Torvalds int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino) 5231da177e4SLinus Torvalds { 5241da177e4SLinus Torvalds uint32_t old_wbuf_ofs; 5251da177e4SLinus Torvalds uint32_t old_wbuf_len; 5261da177e4SLinus Torvalds int ret = 0; 5271da177e4SLinus Torvalds 5281da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() called for ino #%u...\n", ino)); 5291da177e4SLinus Torvalds 5308aee6ac1SDavid Woodhouse if (!c->wbuf) 5318aee6ac1SDavid Woodhouse return 0; 5328aee6ac1SDavid Woodhouse 5331da177e4SLinus Torvalds down(&c->alloc_sem); 5341da177e4SLinus Torvalds if (!jffs2_wbuf_pending_for_ino(c, ino)) { 5351da177e4SLinus Torvalds D1(printk(KERN_DEBUG "Ino #%d not pending in wbuf. Returning\n", ino)); 5361da177e4SLinus Torvalds up(&c->alloc_sem); 5371da177e4SLinus Torvalds return 0; 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds old_wbuf_ofs = c->wbuf_ofs; 5411da177e4SLinus Torvalds old_wbuf_len = c->wbuf_len; 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds if (c->unchecked_size) { 5441da177e4SLinus Torvalds /* GC won't make any progress for a while */ 5451da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() padding. Not finished checking\n")); 5461da177e4SLinus Torvalds down_write(&c->wbuf_sem); 5471da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5487f716cf3SEstelle Hammache /* retry flushing wbuf in case jffs2_wbuf_recover 5497f716cf3SEstelle Hammache left some data in the wbuf */ 5507f716cf3SEstelle Hammache if (ret) 5517f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5521da177e4SLinus Torvalds up_write(&c->wbuf_sem); 5531da177e4SLinus Torvalds } else while (old_wbuf_len && 5541da177e4SLinus Torvalds old_wbuf_ofs == c->wbuf_ofs) { 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds up(&c->alloc_sem); 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() calls gc pass\n")); 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds ret = jffs2_garbage_collect_pass(c); 5611da177e4SLinus Torvalds if (ret) { 5621da177e4SLinus Torvalds /* GC failed. Flush it with padding instead */ 5631da177e4SLinus Torvalds down(&c->alloc_sem); 5641da177e4SLinus Torvalds down_write(&c->wbuf_sem); 5651da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5667f716cf3SEstelle Hammache /* retry flushing wbuf in case jffs2_wbuf_recover 5677f716cf3SEstelle Hammache left some data in the wbuf */ 5687f716cf3SEstelle Hammache if (ret) 5697f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_ACCOUNTING); 5701da177e4SLinus Torvalds up_write(&c->wbuf_sem); 5711da177e4SLinus Torvalds break; 5721da177e4SLinus Torvalds } 5731da177e4SLinus Torvalds down(&c->alloc_sem); 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_flush_wbuf_gc() ends...\n")); 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds up(&c->alloc_sem); 5791da177e4SLinus Torvalds return ret; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds /* Pad write-buffer to end and write it, wasting space. */ 5831da177e4SLinus Torvalds int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c) 5841da177e4SLinus Torvalds { 5851da177e4SLinus Torvalds int ret; 5861da177e4SLinus Torvalds 5878aee6ac1SDavid Woodhouse if (!c->wbuf) 5888aee6ac1SDavid Woodhouse return 0; 5898aee6ac1SDavid Woodhouse 5901da177e4SLinus Torvalds down_write(&c->wbuf_sem); 5911da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 5927f716cf3SEstelle Hammache /* retry - maybe wbuf recover left some data in wbuf. */ 5937f716cf3SEstelle Hammache if (ret) 5947f716cf3SEstelle Hammache ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 5951da177e4SLinus Torvalds up_write(&c->wbuf_sem); 5961da177e4SLinus Torvalds 5971da177e4SLinus Torvalds return ret; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds 600dcb09328SThomas Gleixner static size_t jffs2_fill_wbuf(struct jffs2_sb_info *c, const uint8_t *buf, 601dcb09328SThomas Gleixner size_t len) 602dcb09328SThomas Gleixner { 603dcb09328SThomas Gleixner if (len && !c->wbuf_len && (len >= c->wbuf_pagesize)) 604dcb09328SThomas Gleixner return 0; 605dcb09328SThomas Gleixner 606dcb09328SThomas Gleixner if (len > (c->wbuf_pagesize - c->wbuf_len)) 607dcb09328SThomas Gleixner len = c->wbuf_pagesize - c->wbuf_len; 608dcb09328SThomas Gleixner memcpy(c->wbuf + c->wbuf_len, buf, len); 609dcb09328SThomas Gleixner c->wbuf_len += (uint32_t) len; 610dcb09328SThomas Gleixner return len; 611dcb09328SThomas Gleixner } 612dcb09328SThomas Gleixner 613dcb09328SThomas Gleixner int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, 614dcb09328SThomas Gleixner unsigned long count, loff_t to, size_t *retlen, 615dcb09328SThomas Gleixner uint32_t ino) 616dcb09328SThomas Gleixner { 617dcb09328SThomas Gleixner struct jffs2_eraseblock *jeb; 618dcb09328SThomas Gleixner size_t wbuf_retlen, donelen = 0; 619dcb09328SThomas Gleixner uint32_t outvec_to = to; 620dcb09328SThomas Gleixner int ret, invec; 621dcb09328SThomas Gleixner 622dcb09328SThomas Gleixner /* If not writebuffered flash, don't bother */ 6233be36675SAndrew Victor if (!jffs2_is_writebuffered(c)) 6241da177e4SLinus Torvalds return jffs2_flash_direct_writev(c, invecs, count, to, retlen); 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds down_write(&c->wbuf_sem); 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds /* If wbuf_ofs is not initialized, set it to target address */ 6291da177e4SLinus Torvalds if (c->wbuf_ofs == 0xFFFFFFFF) { 6301da177e4SLinus Torvalds c->wbuf_ofs = PAGE_DIV(to); 6311da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6321da177e4SLinus Torvalds memset(c->wbuf,0xff,c->wbuf_pagesize); 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 635dcb09328SThomas Gleixner /* 636dcb09328SThomas Gleixner * Sanity checks on target address. It's permitted to write 637dcb09328SThomas Gleixner * at PAD(c->wbuf_len+c->wbuf_ofs), and it's permitted to 638dcb09328SThomas Gleixner * write at the beginning of a new erase block. Anything else, 639dcb09328SThomas Gleixner * and you die. New block starts at xxx000c (0-b = block 640dcb09328SThomas Gleixner * header) 6411da177e4SLinus Torvalds */ 6423be36675SAndrew Victor if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) { 6431da177e4SLinus Torvalds /* It's a write to a new block */ 6441da177e4SLinus Torvalds if (c->wbuf_len) { 645dcb09328SThomas Gleixner D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx " 646dcb09328SThomas Gleixner "causes flush of wbuf at 0x%08x\n", 647dcb09328SThomas Gleixner (unsigned long)to, c->wbuf_ofs)); 6481da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); 649dcb09328SThomas Gleixner if (ret) 650dcb09328SThomas Gleixner goto outerr; 6511da177e4SLinus Torvalds } 6521da177e4SLinus Torvalds /* set pointer to new block */ 6531da177e4SLinus Torvalds c->wbuf_ofs = PAGE_DIV(to); 6541da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds if (to != PAD(c->wbuf_ofs + c->wbuf_len)) { 6581da177e4SLinus Torvalds /* We're not writing immediately after the writebuffer. Bad. */ 659dcb09328SThomas Gleixner printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write " 660dcb09328SThomas Gleixner "to %08lx\n", (unsigned long)to); 6611da177e4SLinus Torvalds if (c->wbuf_len) 6621da177e4SLinus Torvalds printk(KERN_CRIT "wbuf was previously %08x-%08x\n", 6631da177e4SLinus Torvalds c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len); 6641da177e4SLinus Torvalds BUG(); 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds /* adjust alignment offset */ 6681da177e4SLinus Torvalds if (c->wbuf_len != PAGE_MOD(to)) { 6691da177e4SLinus Torvalds c->wbuf_len = PAGE_MOD(to); 6701da177e4SLinus Torvalds /* take care of alignment to next page */ 671dcb09328SThomas Gleixner if (!c->wbuf_len) { 6721da177e4SLinus Torvalds c->wbuf_len = c->wbuf_pagesize; 6731da177e4SLinus Torvalds ret = __jffs2_flush_wbuf(c, NOPAD); 674dcb09328SThomas Gleixner if (ret) 675dcb09328SThomas Gleixner goto outerr; 6761da177e4SLinus Torvalds } 6771da177e4SLinus Torvalds } 6781da177e4SLinus Torvalds 679dcb09328SThomas Gleixner for (invec = 0; invec < count; invec++) { 680dcb09328SThomas Gleixner int vlen = invecs[invec].iov_len; 681dcb09328SThomas Gleixner uint8_t *v = invecs[invec].iov_base; 6821da177e4SLinus Torvalds 683dcb09328SThomas Gleixner wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); 6841da177e4SLinus Torvalds 685dcb09328SThomas Gleixner if (c->wbuf_len == c->wbuf_pagesize) { 686dcb09328SThomas Gleixner ret = __jffs2_flush_wbuf(c, NOPAD); 687dcb09328SThomas Gleixner if (ret) 688dcb09328SThomas Gleixner goto outerr; 6891da177e4SLinus Torvalds } 690dcb09328SThomas Gleixner vlen -= wbuf_retlen; 691dcb09328SThomas Gleixner outvec_to += wbuf_retlen; 6921da177e4SLinus Torvalds donelen += wbuf_retlen; 693dcb09328SThomas Gleixner v += wbuf_retlen; 6941da177e4SLinus Torvalds 695dcb09328SThomas Gleixner if (vlen >= c->wbuf_pagesize) { 696dcb09328SThomas Gleixner ret = c->mtd->write(c->mtd, outvec_to, PAGE_DIV(vlen), 697dcb09328SThomas Gleixner &wbuf_retlen, v); 698dcb09328SThomas Gleixner if (ret < 0 || wbuf_retlen != PAGE_DIV(vlen)) 699dcb09328SThomas Gleixner goto outfile; 700dcb09328SThomas Gleixner 701dcb09328SThomas Gleixner vlen -= wbuf_retlen; 702dcb09328SThomas Gleixner outvec_to += wbuf_retlen; 703dcb09328SThomas Gleixner c->wbuf_ofs = outvec_to; 704dcb09328SThomas Gleixner donelen += wbuf_retlen; 705dcb09328SThomas Gleixner v += wbuf_retlen; 7061da177e4SLinus Torvalds } 7071da177e4SLinus Torvalds 708dcb09328SThomas Gleixner wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); 709dcb09328SThomas Gleixner if (c->wbuf_len == c->wbuf_pagesize) { 710dcb09328SThomas Gleixner ret = __jffs2_flush_wbuf(c, NOPAD); 711dcb09328SThomas Gleixner if (ret) 712dcb09328SThomas Gleixner goto outerr; 7131da177e4SLinus Torvalds } 7141da177e4SLinus Torvalds 715dcb09328SThomas Gleixner outvec_to += wbuf_retlen; 716dcb09328SThomas Gleixner donelen += wbuf_retlen; 7171da177e4SLinus Torvalds } 7181da177e4SLinus Torvalds 719dcb09328SThomas Gleixner /* 720dcb09328SThomas Gleixner * If there's a remainder in the wbuf and it's a non-GC write, 721dcb09328SThomas Gleixner * remember that the wbuf affects this ino 722dcb09328SThomas Gleixner */ 7231da177e4SLinus Torvalds *retlen = donelen; 7241da177e4SLinus Torvalds 725e631ddbaSFerenc Havasi if (jffs2_sum_active()) { 726e631ddbaSFerenc Havasi int res = jffs2_sum_add_kvec(c, invecs, count, (uint32_t) to); 727e631ddbaSFerenc Havasi if (res) 728e631ddbaSFerenc Havasi return res; 729e631ddbaSFerenc Havasi } 730e631ddbaSFerenc Havasi 7311da177e4SLinus Torvalds if (c->wbuf_len && ino) 7321da177e4SLinus Torvalds jffs2_wbuf_dirties_inode(c, ino); 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds ret = 0; 735dcb09328SThomas Gleixner up_write(&c->wbuf_sem); 736dcb09328SThomas Gleixner return ret; 7371da177e4SLinus Torvalds 738dcb09328SThomas Gleixner outfile: 739dcb09328SThomas Gleixner /* 740dcb09328SThomas Gleixner * At this point we have no problem, c->wbuf is empty. However 741dcb09328SThomas Gleixner * refile nextblock to avoid writing again to same address. 742dcb09328SThomas Gleixner */ 743dcb09328SThomas Gleixner 744dcb09328SThomas Gleixner spin_lock(&c->erase_completion_lock); 745dcb09328SThomas Gleixner 746dcb09328SThomas Gleixner jeb = &c->blocks[outvec_to / c->sector_size]; 747dcb09328SThomas Gleixner jffs2_block_refile(c, jeb, REFILE_ANYWAY); 748dcb09328SThomas Gleixner 749dcb09328SThomas Gleixner spin_unlock(&c->erase_completion_lock); 750dcb09328SThomas Gleixner 751dcb09328SThomas Gleixner outerr: 752dcb09328SThomas Gleixner *retlen = 0; 7531da177e4SLinus Torvalds up_write(&c->wbuf_sem); 7541da177e4SLinus Torvalds return ret; 7551da177e4SLinus Torvalds } 7561da177e4SLinus Torvalds 7571da177e4SLinus Torvalds /* 7581da177e4SLinus Torvalds * This is the entry for flash write. 7591da177e4SLinus Torvalds * Check, if we work on NAND FLASH, if so build an kvec and write it via vritev 7601da177e4SLinus Torvalds */ 7611da177e4SLinus Torvalds int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf) 7621da177e4SLinus Torvalds { 7631da177e4SLinus Torvalds struct kvec vecs[1]; 7641da177e4SLinus Torvalds 7653be36675SAndrew Victor if (!jffs2_is_writebuffered(c)) 766e631ddbaSFerenc Havasi return jffs2_flash_direct_write(c, ofs, len, retlen, buf); 7671da177e4SLinus Torvalds 7681da177e4SLinus Torvalds vecs[0].iov_base = (unsigned char *) buf; 7691da177e4SLinus Torvalds vecs[0].iov_len = len; 7701da177e4SLinus Torvalds return jffs2_flash_writev(c, vecs, 1, ofs, retlen, 0); 7711da177e4SLinus Torvalds } 7721da177e4SLinus Torvalds 7731da177e4SLinus Torvalds /* 7741da177e4SLinus Torvalds Handle readback from writebuffer and ECC failure return 7751da177e4SLinus Torvalds */ 7761da177e4SLinus Torvalds int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf) 7771da177e4SLinus Torvalds { 7781da177e4SLinus Torvalds loff_t orbf = 0, owbf = 0, lwbf = 0; 7791da177e4SLinus Torvalds int ret; 7801da177e4SLinus Torvalds 7813be36675SAndrew Victor if (!jffs2_is_writebuffered(c)) 7823be36675SAndrew Victor return c->mtd->read(c->mtd, ofs, len, retlen, buf); 7831da177e4SLinus Torvalds 7843be36675SAndrew Victor /* Read flash */ 785894214d1SArtem B. Bityuckiy down_read(&c->wbuf_sem); 7861da177e4SLinus Torvalds ret = c->mtd->read(c->mtd, ofs, len, retlen, buf); 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds if ( (ret == -EBADMSG) && (*retlen == len) ) { 7891da177e4SLinus Torvalds printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n", 7901da177e4SLinus Torvalds len, ofs); 7911da177e4SLinus Torvalds /* 7921da177e4SLinus Torvalds * We have the raw data without ECC correction in the buffer, maybe 7931da177e4SLinus Torvalds * we are lucky and all data or parts are correct. We check the node. 7941da177e4SLinus Torvalds * If data are corrupted node check will sort it out. 7951da177e4SLinus Torvalds * We keep this block, it will fail on write or erase and the we 7961da177e4SLinus Torvalds * mark it bad. Or should we do that now? But we should give him a chance. 7971da177e4SLinus Torvalds * Maybe we had a system crash or power loss before the ecc write or 7981da177e4SLinus Torvalds * a erase was completed. 7991da177e4SLinus Torvalds * So we return success. :) 8001da177e4SLinus Torvalds */ 8011da177e4SLinus Torvalds ret = 0; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds /* if no writebuffer available or write buffer empty, return */ 8051da177e4SLinus Torvalds if (!c->wbuf_pagesize || !c->wbuf_len) 806894214d1SArtem B. Bityuckiy goto exit; 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds /* if we read in a different block, return */ 8093be36675SAndrew Victor if (SECTOR_ADDR(ofs) != SECTOR_ADDR(c->wbuf_ofs)) 810894214d1SArtem B. Bityuckiy goto exit; 8111da177e4SLinus Torvalds 8121da177e4SLinus Torvalds if (ofs >= c->wbuf_ofs) { 8131da177e4SLinus Torvalds owbf = (ofs - c->wbuf_ofs); /* offset in write buffer */ 8141da177e4SLinus Torvalds if (owbf > c->wbuf_len) /* is read beyond write buffer ? */ 8151da177e4SLinus Torvalds goto exit; 8161da177e4SLinus Torvalds lwbf = c->wbuf_len - owbf; /* number of bytes to copy */ 8171da177e4SLinus Torvalds if (lwbf > len) 8181da177e4SLinus Torvalds lwbf = len; 8191da177e4SLinus Torvalds } else { 8201da177e4SLinus Torvalds orbf = (c->wbuf_ofs - ofs); /* offset in read buffer */ 8211da177e4SLinus Torvalds if (orbf > len) /* is write beyond write buffer ? */ 8221da177e4SLinus Torvalds goto exit; 8231da177e4SLinus Torvalds lwbf = len - orbf; /* number of bytes to copy */ 8241da177e4SLinus Torvalds if (lwbf > c->wbuf_len) 8251da177e4SLinus Torvalds lwbf = c->wbuf_len; 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds if (lwbf > 0) 8281da177e4SLinus Torvalds memcpy(buf+orbf,c->wbuf+owbf,lwbf); 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds exit: 8311da177e4SLinus Torvalds up_read(&c->wbuf_sem); 8321da177e4SLinus Torvalds return ret; 8331da177e4SLinus Torvalds } 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds /* 8361da177e4SLinus Torvalds * Check, if the out of band area is empty 8371da177e4SLinus Torvalds */ 8381da177e4SLinus Torvalds int jffs2_check_oob_empty( struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, int mode) 8391da177e4SLinus Torvalds { 8401da177e4SLinus Torvalds unsigned char *buf; 8411da177e4SLinus Torvalds int ret = 0; 8421da177e4SLinus Torvalds int i,len,page; 8431da177e4SLinus Torvalds size_t retlen; 8441da177e4SLinus Torvalds int oob_size; 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds /* allocate a buffer for all oob data in this sector */ 8471da177e4SLinus Torvalds oob_size = c->mtd->oobsize; 8481da177e4SLinus Torvalds len = 4 * oob_size; 8491da177e4SLinus Torvalds buf = kmalloc(len, GFP_KERNEL); 8501da177e4SLinus Torvalds if (!buf) { 8511da177e4SLinus Torvalds printk(KERN_NOTICE "jffs2_check_oob_empty(): allocation of temporary data buffer for oob check failed\n"); 8521da177e4SLinus Torvalds return -ENOMEM; 8531da177e4SLinus Torvalds } 8541da177e4SLinus Torvalds /* 8551da177e4SLinus Torvalds * if mode = 0, we scan for a total empty oob area, else we have 8561da177e4SLinus Torvalds * to take care of the cleanmarker in the first page of the block 8571da177e4SLinus Torvalds */ 8581da177e4SLinus Torvalds ret = jffs2_flash_read_oob(c, jeb->offset, len , &retlen, buf); 8591da177e4SLinus Torvalds if (ret) { 8601da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB failed %d for block at %08x\n", ret, jeb->offset)); 8611da177e4SLinus Torvalds goto out; 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds if (retlen < len) { 8651da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB return short read " 8661da177e4SLinus Torvalds "(%zd bytes not %d) for block at %08x\n", retlen, len, jeb->offset)); 8671da177e4SLinus Torvalds ret = -EIO; 8681da177e4SLinus Torvalds goto out; 8691da177e4SLinus Torvalds } 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds /* Special check for first page */ 8721da177e4SLinus Torvalds for(i = 0; i < oob_size ; i++) { 8731da177e4SLinus Torvalds /* Yeah, we know about the cleanmarker. */ 8741da177e4SLinus Torvalds if (mode && i >= c->fsdata_pos && 8751da177e4SLinus Torvalds i < c->fsdata_pos + c->fsdata_len) 8761da177e4SLinus Torvalds continue; 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvalds if (buf[i] != 0xFF) { 8791da177e4SLinus Torvalds D2(printk(KERN_DEBUG "Found %02x at %x in OOB for %08x\n", 880730554d9SArtem B. Bityutskiy buf[i], i, jeb->offset)); 8811da177e4SLinus Torvalds ret = 1; 8821da177e4SLinus Torvalds goto out; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds } 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds /* we know, we are aligned :) */ 8871da177e4SLinus Torvalds for (page = oob_size; page < len; page += sizeof(long)) { 8881da177e4SLinus Torvalds unsigned long dat = *(unsigned long *)(&buf[page]); 8891da177e4SLinus Torvalds if(dat != -1) { 8901da177e4SLinus Torvalds ret = 1; 8911da177e4SLinus Torvalds goto out; 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds } 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds out: 8961da177e4SLinus Torvalds kfree(buf); 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds return ret; 8991da177e4SLinus Torvalds } 9001da177e4SLinus Torvalds 9011da177e4SLinus Torvalds /* 9021da177e4SLinus Torvalds * Scan for a valid cleanmarker and for bad blocks 9031da177e4SLinus Torvalds * For virtual blocks (concatenated physical blocks) check the cleanmarker 9041da177e4SLinus Torvalds * only in the first page of the first physical block, but scan for bad blocks in all 9051da177e4SLinus Torvalds * physical blocks 9061da177e4SLinus Torvalds */ 9071da177e4SLinus Torvalds int jffs2_check_nand_cleanmarker (struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) 9081da177e4SLinus Torvalds { 9091da177e4SLinus Torvalds struct jffs2_unknown_node n; 9101da177e4SLinus Torvalds unsigned char buf[2 * NAND_MAX_OOBSIZE]; 9111da177e4SLinus Torvalds unsigned char *p; 9121da177e4SLinus Torvalds int ret, i, cnt, retval = 0; 9131da177e4SLinus Torvalds size_t retlen, offset; 9141da177e4SLinus Torvalds int oob_size; 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds offset = jeb->offset; 9171da177e4SLinus Torvalds oob_size = c->mtd->oobsize; 9181da177e4SLinus Torvalds 9191da177e4SLinus Torvalds /* Loop through the physical blocks */ 9201da177e4SLinus Torvalds for (cnt = 0; cnt < (c->sector_size / c->mtd->erasesize); cnt++) { 9211da177e4SLinus Torvalds /* Check first if the block is bad. */ 9221da177e4SLinus Torvalds if (c->mtd->block_isbad (c->mtd, offset)) { 9231da177e4SLinus Torvalds D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Bad block at %08x\n", jeb->offset)); 9241da177e4SLinus Torvalds return 2; 9251da177e4SLinus Torvalds } 9261da177e4SLinus Torvalds /* 9271da177e4SLinus Torvalds * We read oob data from page 0 and 1 of the block. 9281da177e4SLinus Torvalds * page 0 contains cleanmarker and badblock info 9291da177e4SLinus Torvalds * page 1 contains failure count of this block 9301da177e4SLinus Torvalds */ 9311da177e4SLinus Torvalds ret = c->mtd->read_oob (c->mtd, offset, oob_size << 1, &retlen, buf); 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds if (ret) { 9341da177e4SLinus Torvalds D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): Read OOB failed %d for block at %08x\n", ret, jeb->offset)); 9351da177e4SLinus Torvalds return ret; 9361da177e4SLinus Torvalds } 9371da177e4SLinus Torvalds if (retlen < (oob_size << 1)) { 9381da177e4SLinus 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)); 9391da177e4SLinus Torvalds return -EIO; 9401da177e4SLinus Torvalds } 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds /* Check cleanmarker only on the first physical block */ 9431da177e4SLinus Torvalds if (!cnt) { 9441da177e4SLinus Torvalds n.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK); 9451da177e4SLinus Torvalds n.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER); 9461da177e4SLinus Torvalds n.totlen = cpu_to_je32 (8); 9471da177e4SLinus Torvalds p = (unsigned char *) &n; 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds for (i = 0; i < c->fsdata_len; i++) { 9501da177e4SLinus Torvalds if (buf[c->fsdata_pos + i] != p[i]) { 9511da177e4SLinus Torvalds retval = 1; 9521da177e4SLinus Torvalds } 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds D1(if (retval == 1) { 9551da177e4SLinus Torvalds printk(KERN_WARNING "jffs2_check_nand_cleanmarker(): Cleanmarker node not detected in block at %08x\n", jeb->offset); 9561da177e4SLinus Torvalds printk(KERN_WARNING "OOB at %08x was ", offset); 9571da177e4SLinus Torvalds for (i=0; i < oob_size; i++) { 9581da177e4SLinus Torvalds printk("%02x ", buf[i]); 9591da177e4SLinus Torvalds } 9601da177e4SLinus Torvalds printk("\n"); 9611da177e4SLinus Torvalds }) 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds offset += c->mtd->erasesize; 9641da177e4SLinus Torvalds } 9651da177e4SLinus Torvalds return retval; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) 9691da177e4SLinus Torvalds { 9701da177e4SLinus Torvalds struct jffs2_unknown_node n; 9711da177e4SLinus Torvalds int ret; 9721da177e4SLinus Torvalds size_t retlen; 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds n.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 9751da177e4SLinus Torvalds n.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER); 9761da177e4SLinus Torvalds n.totlen = cpu_to_je32(8); 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds ret = jffs2_flash_write_oob(c, jeb->offset + c->fsdata_pos, c->fsdata_len, &retlen, (unsigned char *)&n); 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds if (ret) { 9811da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Write failed for block at %08x: error %d\n", jeb->offset, ret)); 9821da177e4SLinus Torvalds return ret; 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds if (retlen != c->fsdata_len) { 9851da177e4SLinus 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)); 9861da177e4SLinus Torvalds return ret; 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds return 0; 9891da177e4SLinus Torvalds } 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds /* 9921da177e4SLinus Torvalds * On NAND we try to mark this block bad. If the block was erased more 9931da177e4SLinus Torvalds * than MAX_ERASE_FAILURES we mark it finaly bad. 9941da177e4SLinus Torvalds * Don't care about failures. This block remains on the erase-pending 9951da177e4SLinus Torvalds * or badblock list as long as nobody manipulates the flash with 9961da177e4SLinus Torvalds * a bootloader or something like that. 9971da177e4SLinus Torvalds */ 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset) 10001da177e4SLinus Torvalds { 10011da177e4SLinus Torvalds int ret; 10021da177e4SLinus Torvalds 10031da177e4SLinus Torvalds /* if the count is < max, we try to write the counter to the 2nd page oob area */ 10041da177e4SLinus Torvalds if( ++jeb->bad_count < MAX_ERASE_FAILURES) 10051da177e4SLinus Torvalds return 0; 10061da177e4SLinus Torvalds 10071da177e4SLinus Torvalds if (!c->mtd->block_markbad) 10081da177e4SLinus Torvalds return 1; // What else can we do? 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Marking bad block at %08x\n", bad_offset)); 10111da177e4SLinus Torvalds ret = c->mtd->block_markbad(c->mtd, bad_offset); 10121da177e4SLinus Torvalds 10131da177e4SLinus Torvalds if (ret) { 10141da177e4SLinus Torvalds D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Write failed for block at %08x: error %d\n", jeb->offset, ret)); 10151da177e4SLinus Torvalds return ret; 10161da177e4SLinus Torvalds } 10171da177e4SLinus Torvalds return 1; 10181da177e4SLinus Torvalds } 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds #define NAND_JFFS2_OOB16_FSDALEN 8 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds static struct nand_oobinfo jffs2_oobinfo_docecc = { 10231da177e4SLinus Torvalds .useecc = MTD_NANDECC_PLACE, 10241da177e4SLinus Torvalds .eccbytes = 6, 10251da177e4SLinus Torvalds .eccpos = {0,1,2,3,4,5} 10261da177e4SLinus Torvalds }; 10271da177e4SLinus Torvalds 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds static int jffs2_nand_set_oobinfo(struct jffs2_sb_info *c) 10301da177e4SLinus Torvalds { 10311da177e4SLinus Torvalds struct nand_oobinfo *oinfo = &c->mtd->oobinfo; 10321da177e4SLinus Torvalds 10331da177e4SLinus Torvalds /* Do this only, if we have an oob buffer */ 10341da177e4SLinus Torvalds if (!c->mtd->oobsize) 10351da177e4SLinus Torvalds return 0; 10361da177e4SLinus Torvalds 10371da177e4SLinus Torvalds /* Cleanmarker is out-of-band, so inline size zero */ 10381da177e4SLinus Torvalds c->cleanmarker_size = 0; 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds /* Should we use autoplacement ? */ 10411da177e4SLinus Torvalds if (oinfo && oinfo->useecc == MTD_NANDECC_AUTOPLACE) { 10421da177e4SLinus Torvalds D1(printk(KERN_DEBUG "JFFS2 using autoplace on NAND\n")); 10431da177e4SLinus Torvalds /* Get the position of the free bytes */ 10441da177e4SLinus Torvalds if (!oinfo->oobfree[0][1]) { 10451da177e4SLinus Torvalds printk (KERN_WARNING "jffs2_nand_set_oobinfo(): Eeep. Autoplacement selected and no empty space in oob\n"); 10461da177e4SLinus Torvalds return -ENOSPC; 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds c->fsdata_pos = oinfo->oobfree[0][0]; 10491da177e4SLinus Torvalds c->fsdata_len = oinfo->oobfree[0][1]; 10501da177e4SLinus Torvalds if (c->fsdata_len > 8) 10511da177e4SLinus Torvalds c->fsdata_len = 8; 10521da177e4SLinus Torvalds } else { 10531da177e4SLinus Torvalds /* This is just a legacy fallback and should go away soon */ 10541da177e4SLinus Torvalds switch(c->mtd->ecctype) { 10551da177e4SLinus Torvalds case MTD_ECC_RS_DiskOnChip: 10561da177e4SLinus Torvalds printk(KERN_WARNING "JFFS2 using DiskOnChip hardware ECC without autoplacement. Fix it!\n"); 10571da177e4SLinus Torvalds c->oobinfo = &jffs2_oobinfo_docecc; 10581da177e4SLinus Torvalds c->fsdata_pos = 6; 10591da177e4SLinus Torvalds c->fsdata_len = NAND_JFFS2_OOB16_FSDALEN; 10601da177e4SLinus Torvalds c->badblock_pos = 15; 10611da177e4SLinus Torvalds break; 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds default: 10641da177e4SLinus Torvalds D1(printk(KERN_DEBUG "JFFS2 on NAND. No autoplacment info found\n")); 10651da177e4SLinus Torvalds return -EINVAL; 10661da177e4SLinus Torvalds } 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds return 0; 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds int jffs2_nand_flash_setup(struct jffs2_sb_info *c) 10721da177e4SLinus Torvalds { 10731da177e4SLinus Torvalds int res; 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds /* Initialise write buffer */ 10761da177e4SLinus Torvalds init_rwsem(&c->wbuf_sem); 107728318776SJoern Engel c->wbuf_pagesize = c->mtd->writesize; 10781da177e4SLinus Torvalds c->wbuf_ofs = 0xFFFFFFFF; 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 10811da177e4SLinus Torvalds if (!c->wbuf) 10821da177e4SLinus Torvalds return -ENOMEM; 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds res = jffs2_nand_set_oobinfo(c); 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds #ifdef BREAKME 10871da177e4SLinus Torvalds if (!brokenbuf) 10881da177e4SLinus Torvalds brokenbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 10891da177e4SLinus Torvalds if (!brokenbuf) { 10901da177e4SLinus Torvalds kfree(c->wbuf); 10911da177e4SLinus Torvalds return -ENOMEM; 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds memset(brokenbuf, 0xdb, c->wbuf_pagesize); 10941da177e4SLinus Torvalds #endif 10951da177e4SLinus Torvalds return res; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c) 10991da177e4SLinus Torvalds { 11001da177e4SLinus Torvalds kfree(c->wbuf); 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 11038f15fd55SAndrew Victor int jffs2_dataflash_setup(struct jffs2_sb_info *c) { 11048f15fd55SAndrew Victor c->cleanmarker_size = 0; /* No cleanmarkers needed */ 11058f15fd55SAndrew Victor 11068f15fd55SAndrew Victor /* Initialize write buffer */ 11078f15fd55SAndrew Victor init_rwsem(&c->wbuf_sem); 11088f15fd55SAndrew Victor 1109daba5cc4SArtem B. Bityutskiy 1110daba5cc4SArtem B. Bityutskiy c->wbuf_pagesize = c->mtd->erasesize; 1111daba5cc4SArtem B. Bityutskiy 1112daba5cc4SArtem B. Bityutskiy /* Find a suitable c->sector_size 1113daba5cc4SArtem B. Bityutskiy * - Not too much sectors 1114daba5cc4SArtem B. Bityutskiy * - Sectors have to be at least 4 K + some bytes 1115daba5cc4SArtem B. Bityutskiy * - All known dataflashes have erase sizes of 528 or 1056 1116daba5cc4SArtem B. Bityutskiy * - we take at least 8 eraseblocks and want to have at least 8K size 1117daba5cc4SArtem B. Bityutskiy * - The concatenation should be a power of 2 1118daba5cc4SArtem B. Bityutskiy */ 1119daba5cc4SArtem B. Bityutskiy 1120daba5cc4SArtem B. Bityutskiy c->sector_size = 8 * c->mtd->erasesize; 1121daba5cc4SArtem B. Bityutskiy 1122daba5cc4SArtem B. Bityutskiy while (c->sector_size < 8192) { 1123daba5cc4SArtem B. Bityutskiy c->sector_size *= 2; 1124daba5cc4SArtem B. Bityutskiy } 1125daba5cc4SArtem B. Bityutskiy 1126daba5cc4SArtem B. Bityutskiy /* It may be necessary to adjust the flash size */ 1127daba5cc4SArtem B. Bityutskiy c->flash_size = c->mtd->size; 1128daba5cc4SArtem B. Bityutskiy 1129daba5cc4SArtem B. Bityutskiy if ((c->flash_size % c->sector_size) != 0) { 1130daba5cc4SArtem B. Bityutskiy c->flash_size = (c->flash_size / c->sector_size) * c->sector_size; 1131daba5cc4SArtem B. Bityutskiy printk(KERN_WARNING "JFFS2 flash size adjusted to %dKiB\n", c->flash_size); 1132daba5cc4SArtem B. Bityutskiy }; 1133daba5cc4SArtem B. Bityutskiy 1134daba5cc4SArtem B. Bityutskiy c->wbuf_ofs = 0xFFFFFFFF; 11358f15fd55SAndrew Victor c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 11368f15fd55SAndrew Victor if (!c->wbuf) 11378f15fd55SAndrew Victor return -ENOMEM; 11388f15fd55SAndrew Victor 1139daba5cc4SArtem B. Bityutskiy printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size); 11408f15fd55SAndrew Victor 11418f15fd55SAndrew Victor return 0; 11428f15fd55SAndrew Victor } 11438f15fd55SAndrew Victor 11448f15fd55SAndrew Victor void jffs2_dataflash_cleanup(struct jffs2_sb_info *c) { 11458f15fd55SAndrew Victor kfree(c->wbuf); 11468f15fd55SAndrew Victor } 11478f15fd55SAndrew Victor 114859da721aSNicolas Pitre int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) { 1149c8b229deSJoern Engel /* Cleanmarker currently occupies whole programming regions, 1150c8b229deSJoern Engel * either one or 2 for 8Byte STMicro flashes. */ 1151c8b229deSJoern Engel c->cleanmarker_size = max(16u, c->mtd->writesize); 115259da721aSNicolas Pitre 115359da721aSNicolas Pitre /* Initialize write buffer */ 115459da721aSNicolas Pitre init_rwsem(&c->wbuf_sem); 115528318776SJoern Engel c->wbuf_pagesize = c->mtd->writesize; 115659da721aSNicolas Pitre c->wbuf_ofs = 0xFFFFFFFF; 115759da721aSNicolas Pitre 115859da721aSNicolas Pitre c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); 115959da721aSNicolas Pitre if (!c->wbuf) 116059da721aSNicolas Pitre return -ENOMEM; 116159da721aSNicolas Pitre 116259da721aSNicolas Pitre return 0; 116359da721aSNicolas Pitre } 116459da721aSNicolas Pitre 116559da721aSNicolas Pitre void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) { 116659da721aSNicolas Pitre kfree(c->wbuf); 116759da721aSNicolas Pitre } 1168