If unsure, say Y.
+config YAFFS_9BYTE_TAGS
+ bool "Use older-style on-NAND data format with pageStatus byte"
+ depends on YAFFS_YAFFS1
+ default n
+ help
+
+ Older-style on-NAND data format has a "pageStatus" byte to record
+ chunk/page state. This byte is zero when the page is discarded.
+ Choose this option if you have existing on-NAND data using this
+ format that you need to continue to support. New data written
+ also uses the older-style format. Note: Use of this option
+ generally requires that MTD's oob layout be adjusted to use the
+ older-style format. See notes on tags formats and MTD versions.
+
+ If unsure, say N.
+
config YAFFS_DOES_ECC
bool "Lets Yaffs do its own ECC"
- depends on YAFFS_FS && YAFFS_YAFFS1
+ depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
default n
help
This enables Yaffs to use its own ECC functions instead of using
config YAFFS_ECC_WRONG_ORDER
bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
- depends on YAFFS_FS && YAFFS_DOES_ECC
+ depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
default n
help
This makes yaffs_ecc.c use the same ecc byte order as Steven
obj-m := yaffs2.o
yaffs2-objs := yaffs_mtdif.o yaffs_mtdif2.o
+ yaffs2-objs += yaffs_mtdif1.o yaffs_packedtags1.o
yaffs2-objs += yaffs_ecc.o yaffs_fs.o yaffs_guts.o
yaffs2-objs += yaffs_packedtags2.o yaffs_qsort.o
yaffs2-objs += yaffs_tagscompat.o yaffs_tagsvalidity.o
#
# NB Warning this Makefile does not include header dependencies.
#
-# $Id: Makefile,v 1.14 2007-03-07 08:30:40 colin Exp $
+# $Id: Makefile,v 1.15 2007-07-18 19:40:38 charles Exp $
#EXTRA_COMPILE_FLAGS = -DYAFFS_IGNORE_TAGS_ECC
#endif
-const char *yaffsfs_c_version="$Id: yaffsfs.c,v 1.17 2007-02-14 01:09:06 wookey Exp $";
+const char *yaffsfs_c_version="$Id: yaffsfs.c,v 1.18 2007-07-18 19:40:38 charles Exp $";
// configurationList is the list of devices that are supported
static yaffsfs_DeviceConfiguration *yaffsfs_configurationList;
// Handle management.
//
+
+unsigned int yaffs_wr_attempts;
+
typedef struct
{
__u8 inUse:1; // this handle is in use
/* Default: 10 */
/* Meaning: set the count of blocks to reserve for checkpointing */
-#define YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
+#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
+
+/*
+Older-style on-NAND data format has a "pageStatus" byte to record
+chunk/page state. This byte is zeroed when the page is discarded.
+Choose this option if you have existing on-NAND data in this format
+that you need to continue to support. New data written also uses the
+older-style format.
+Note: Use of this option generally requires that MTD's oob layout be
+adjusted to use the older-style format. See notes on tags formats and
+MTD versions.
+*/
+/* Default: Not selected */
+/* Meaning: Use older-style on-NAND data format with pageStatus byte */
+#define CONFIG_YAFFS_9BYTE_TAGS
#endif /* YAFFS_OUT_OF_TREE */
*/
const char *yaffs_fs_c_version =
- "$Id: yaffs_fs.c,v 1.60 2007-05-15 20:07:40 charles Exp $";
+ "$Id: yaffs_fs.c,v 1.61 2007-07-18 19:40:38 charles Exp $";
extern const char *yaffs_guts_c_version;
#include <linux/version.h>
#include "yportenv.h"
#include "yaffs_guts.h"
-unsigned yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS
- /* | 0xFFFFFFFF */;
-
#include <linux/mtd/mtd.h>
#include "yaffs_mtdif.h"
+#include "yaffs_mtdif1.h"
#include "yaffs_mtdif2.h"
+unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
+
+/* Module Parameters */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+module_param(yaffs_traceMask,uint,0644);
+module_param(yaffs_wr_attempts,uint,0644);
+#else
+MODULE_PARM(yaffs_traceMask,"i");
+MODULE_PARM(yaffs_wr_attempts,"i");
+#endif
+
/*#define T(x) printk x */
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
dev->startBlock = 0;
dev->endBlock = nBlocks - 1;
} else {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ /* use the MTD interface in yaffs_mtdif1.c */
+ dev->writeChunkWithTagsToNAND =
+ nandmtd1_WriteChunkWithTagsToNAND;
+ dev->readChunkWithTagsFromNAND =
+ nandmtd1_ReadChunkWithTagsFromNAND;
+ dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
+ dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
+#else
dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
+#endif
dev->isYaffs2 = 0;
}
/* ... and common functions */
*/
const char *yaffs_guts_c_version =
- "$Id: yaffs_guts.c,v 1.49 2007-05-15 20:07:40 charles Exp $";
+ "$Id: yaffs_guts.c,v 1.50 2007-07-18 19:40:38 charles Exp $";
#include "yportenv.h"
yaffs_ExtendedTags * tags,
int useReserve)
{
+ int attempts = 0;
+ int writeOk = 0;
int chunk;
- int writeOk = 0;
- int erasedOk = 1;
- int attempts = 0;
- yaffs_BlockInfo *bi;
-
yaffs_InvalidateCheckpoint(dev);
do {
- chunk = yaffs_AllocateChunk(dev, useReserve,&bi);
-
- if (chunk >= 0) {
- /* First check this chunk is erased, if it needs checking.
- * The checking policy (unless forced always on) is as follows:
- * Check the first page we try to write in a block.
- * - If the check passes then we don't need to check any more.
- * - If the check fails, we check again...
- * If the block has been erased, we don't need to check.
- *
- * However, if the block has been prioritised for gc, then
- * we think there might be something odd about this block
- * and stop using it.
- *
- * Rationale:
- * We should only ever see chunks that have not been erased
- * if there was a partially written chunk due to power loss
- * This checking policy should catch that case with very
- * few checks and thus save a lot of checks that are most likely not
- * needed.
- */
-
- if(bi->gcPrioritise){
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
- } else {
-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
+ yaffs_BlockInfo *bi = 0;
+ int erasedOk = 0;
- bi->skipErasedCheck = 0;
+ chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
+ if (chunk < 0) {
+ /* no space */
+ break;
+ }
-#endif
- if(!bi->skipErasedCheck){
- erasedOk = yaffs_CheckChunkErased(dev, chunk);
- if(erasedOk && !bi->gcPrioritise)
- bi->skipErasedCheck = 1;
- }
+ /* First check this chunk is erased, if it needs
+ * checking. The checking policy (unless forced
+ * always on) is as follows:
+ *
+ * Check the first page we try to write in a block.
+ * If the check passes then we don't need to check any
+ * more. If the check fails, we check again...
+ * If the block has been erased, we don't need to check.
+ *
+ * However, if the block has been prioritised for gc,
+ * then we think there might be something odd about
+ * this block and stop using it.
+ *
+ * Rationale: We should only ever see chunks that have
+ * not been erased if there was a partially written
+ * chunk due to power loss. This checking policy should
+ * catch that case with very few checks and thus save a
+ * lot of checks that are most likely not needed.
+ */
+ if (bi->gcPrioritise) {
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+ /* try another chunk */
+ continue;
+ }
- if (!erasedOk) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("**>> yaffs chunk %d was not erased"
- TENDSTR), chunk));
- } else {
- writeOk =
- yaffs_WriteChunkWithTagsToNAND(dev, chunk,
- data, tags);
- }
-
- attempts++;
+ /* let's give it a try */
+ attempts++;
- if (writeOk) {
- /*
- * Copy the data into the robustification buffer.
- * NB We do this at the end to prevent duplicates in the case of a write error.
- * Todo
- */
- yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
-
- } else {
- /* The erased check or write failed */
- yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
- }
+#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
+ bi->skipErasedCheck = 0;
+#endif
+ if (!bi->skipErasedCheck) {
+ erasedOk = yaffs_CheckChunkErased(dev, chunk);
+ if (erasedOk != YAFFS_OK) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR ("**>> yaffs chunk %d was not erased"
+ TENDSTR), chunk));
+
+ /* try another chunk */
+ continue;
}
+ bi->skipErasedCheck = 1;
}
- } while (chunk >= 0 && !writeOk);
+ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
+ data, tags);
+ if (writeOk != YAFFS_OK) {
+ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
+ /* try another chunk */
+ continue;
+ }
+
+ /* Copy the data into the robustification buffer */
+ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
+
+ } while (writeOk != YAFFS_OK &&
+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
+
+ if(!writeOk)
+ chunk = -1;
if (attempts > 1) {
T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs write required %d attempts" TENDSTR),
- attempts));
+ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
+ attempts));
+
dev->nRetriedWrites += (attempts - 1);
}
int pagesInUse = 0;
int prioritised=0;
yaffs_BlockInfo *bi;
- static int nonAggressiveSkip = 0;
int pendingPrioritisedExist = 0;
/* First let's see if we need to grab a prioritised block */
* block has only a few pages in use.
*/
- nonAggressiveSkip--;
+ dev->nonAggressiveSkip--;
- if (!aggressive && (nonAggressiveSkip > 0)) {
+ if (!aggressive && (dev->nonAggressiveSkip > 0)) {
return -1;
}
dev->oldestDirtySequence = 0;
if (dirtiest > 0) {
- nonAggressiveSkip = 4;
+ dev->nonAggressiveSkip = 4;
}
return dirtiest;
#define YAFFS_N_TEMP_BUFFERS 4
+/* We limit the number attempts at sucessfully saving a chunk of data.
+ * Small-page devices have 32 pages per block; large-page devices have 64.
+ * Default to something in the order of 5 to 10 blocks worth of chunks.
+ */
+#define YAFFS_WR_ATTEMPTS (5*64)
+
/* Sequence numbers are used in YAFFS2 to determine block allocation order.
* The range is limited slightly to help distinguish bad numbers from good.
* This also allows us to perhaps in the future use special numbers for
int softDeletions:10; /* number of soft deleted pages */
int pagesInUse:10; /* number of pages in use */
- __u32 blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */
+ unsigned blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */
__u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */
/* and retire the block. */
__u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */
int currentDirtyChecker; /* Used to find current dirtiest block */
__u32 *gcCleanupList; /* objects to delete at the end of a GC. */
+ int nonAggressiveSkip; /* GC state/mode */
/* Statistcs */
int nPageWrites;
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * This module provides the interface between yaffs_nand.c and the
+ * MTD API. This version is used when the MTD interface supports the
+ * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
+ * and we have small-page NAND device.
+ *
+ * These functions are invoked via function pointers in yaffs_nand.c.
+ * This replaces functionality provided by functions in yaffs_mtdif.c
+ * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
+ * called in yaffs_mtdif.c when the function pointers are NULL.
+ * We assume the MTD layer is performing ECC (useNANDECC is true).
+ */
+
+#include "yportenv.h"
+#include "yaffs_guts.h"
+#include "yaffs_packedtags1.h"
+#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC
+
+#include "linux/kernel.h"
+#include "linux/version.h"
+#include "linux/types.h"
+#include "linux/mtd/mtd.h"
+
+/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+
+const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.1 2007-07-18 19:40:38 charles Exp $";
+
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
+# define YTAG1_SIZE 8
+#else
+# define YTAG1_SIZE 9
+#endif
+
+#if 0
+/* Use the following nand_ecclayout with MTD when using
+ * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
+ * If you have existing Yaffs images and the byte order differs from this,
+ * adjust 'oobfree' to match your existing Yaffs data.
+ *
+ * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
+ * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
+ * the 9th byte.
+ *
+ * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
+ * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
+ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
+ * byte and B is the small-page bad-block indicator byte.
+ */
+static struct nand_ecclayout nand_oob_16 = {
+ .eccbytes = 6,
+ .eccpos = { 8, 9, 10, 13, 14, 15 },
+ .oobavail = 9,
+ .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
+};
+#endif
+
+/* Write a chunk (page) of data to NAND.
+ *
+ * Caller always provides ExtendedTags data which are converted to a more
+ * compact (packed) form for storage in NAND. A mini-ECC runs over the
+ * contents of the tags meta-data; used to valid the tags when read.
+ *
+ * - Pack ExtendedTags to PackedTags1 form
+ * - Compute mini-ECC for PackedTags1
+ * - Write data and packed tags to NAND.
+ *
+ * Note: Due to the use of the PackedTags1 meta-data which does not include
+ * a full sequence number (as found in the larger PackedTags2 form) it is
+ * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
+ * discarded and dirty. This is not ideal: newer NAND parts are supposed
+ * to be written just once. When Yaffs performs this operation, this
+ * function is called with a NULL data pointer -- calling MTD write_oob
+ * without data is valid usage (2.6.17).
+ *
+ * Any underlying MTD error results in YAFFS_FAIL.
+ * Returns YAFFS_OK or YAFFS_FAIL.
+ */
+int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
+ int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
+{
+ struct mtd_info * mtd = dev->genericDevice;
+ int chunkBytes = dev->nDataBytesPerChunk;
+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
+ struct mtd_oob_ops ops;
+ yaffs_PackedTags1 pt1;
+ int retval;
+
+ /* we assume that PackedTags1 and yaffs_Tags are compatible */
+ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
+ compile_time_assertion(sizeof(yaffs_Tags) == 8);
+
+ yaffs_PackTags1(&pt1, etags);
+ yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
+
+ /* When deleting a chunk, the upper layer provides only skeletal
+ * etags, one with chunkDeleted set. However, we need to update the
+ * tags, not erase them completely. So we use the NAND write property
+ * that only zeroed-bits stick and set tag bytes to all-ones and
+ * zero just the (not) deleted bit.
+ */
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
+ if (etags->chunkDeleted) {
+ memset(&pt1, 0xff, 8);
+ /* clear delete status bit to indicate deleted */
+ pt1.deleted = 0;
+ }
+#else
+ ((__u8 *)&pt1)[8] = 0xff;
+ if (etags->chunkDeleted) {
+ memset(&pt1, 0xff, 8);
+ /* zero pageStatus byte to indicate deleted */
+ ((__u8 *)&pt1)[8] = 0;
+ }
+#endif
+
+ memset(&ops, 0, sizeof(ops));
+ ops.mode = MTD_OOB_AUTO;
+ ops.len = (data) ? chunkBytes : 0;
+ ops.ooblen = YTAG1_SIZE;
+ ops.datbuf = (__u8 *)data;
+ ops.oobbuf = (__u8 *)&pt1;
+
+ retval = mtd->write_oob(mtd, addr, &ops);
+ if (retval) {
+ yaffs_trace(YAFFS_TRACE_MTD,
+ "write_oob failed, chunk %d, mtd error %d\n",
+ chunkInNAND, retval);
+ }
+ return retval ? YAFFS_FAIL : YAFFS_OK;
+}
+
+/* Return with empty ExtendedTags but add eccResult.
+ */
+static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
+{
+ if (etags) {
+ memset(etags, 0, sizeof(*etags));
+ etags->eccResult = eccResult;
+ }
+ return retval;
+}
+
+/* Read a chunk (page) from NAND.
+ *
+ * Caller expects ExtendedTags data to be usable even on error; that is,
+ * all members except eccResult and blockBad are zeroed.
+ *
+ * - Check ECC results for data (if applicable)
+ * - Check for blank/erased block (return empty ExtendedTags if blank)
+ * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
+ * - Convert PackedTags1 to ExtendedTags
+ * - Update eccResult and blockBad members to refect state.
+ *
+ * Returns YAFFS_OK or YAFFS_FAIL.
+ */
+int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
+ int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
+{
+ struct mtd_info * mtd = dev->genericDevice;
+ int chunkBytes = dev->nDataBytesPerChunk;
+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
+ int eccres = YAFFS_ECC_RESULT_NO_ERROR;
+ struct mtd_oob_ops ops;
+ yaffs_PackedTags1 pt1;
+ int retval;
+ int deleted;
+
+ memset(&ops, 0, sizeof(ops));
+ ops.mode = MTD_OOB_AUTO;
+ ops.len = (data) ? chunkBytes : 0;
+ ops.ooblen = YTAG1_SIZE;
+ ops.datbuf = data;
+ ops.oobbuf = (__u8 *)&pt1;
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+ /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
+ * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
+ */
+ ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
+#endif
+ /* Read page and oob using MTD.
+ * Check status and determine ECC result.
+ */
+ retval = mtd->read_oob(mtd, addr, &ops);
+ if (retval) {
+ yaffs_trace(YAFFS_TRACE_MTD,
+ "read_oob failed, chunk %d, mtd error %d\n",
+ chunkInNAND, retval);
+ }
+
+ switch (retval) {
+ case 0:
+ /* no error */
+ break;
+
+ case -EUCLEAN:
+ /* MTD's ECC fixed the data */
+ eccres = YAFFS_ECC_RESULT_FIXED;
+ dev->eccFixed++;
+ break;
+
+ case -EBADMSG:
+ /* MTD's ECC could not fix the data */
+ dev->eccUnfixed++;
+ /* fall into... */
+ default:
+ rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
+ etags->blockBad = (mtd->block_isbad)(mtd, addr);
+ return YAFFS_FAIL;
+ }
+
+ /* Check for a blank/erased chunk.
+ */
+ if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
+ /* when blank, upper layers want eccResult to be <= NO_ERROR */
+ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
+ }
+
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
+ /* Read deleted status (bit) then return it to it's non-deleted
+ * state before performing tags mini-ECC check. pt1.deleted is
+ * inverted.
+ */
+ deleted = !pt1.deleted;
+ pt1.deleted = 1;
+#else
+ (void) deleted; /* not used */
+#endif
+
+ /* Check the packed tags mini-ECC and correct if necessary/possible.
+ */
+ retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
+ switch (retval) {
+ case 0:
+ /* no tags error, use MTD result */
+ break;
+ case 1:
+ /* recovered tags-ECC error */
+ dev->tagsEccFixed++;
+ eccres = YAFFS_ECC_RESULT_FIXED;
+ break;
+ default:
+ /* unrecovered tags-ECC error */
+ dev->tagsEccUnfixed++;
+ return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
+ }
+
+ /* Unpack the tags to extended form and set ECC result.
+ * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
+ */
+ pt1.shouldBeFF = 0xFFFFFFFF;
+ yaffs_UnpackTags1(etags, &pt1);
+ etags->eccResult = eccres;
+
+ /* Set deleted state.
+ */
+#ifndef CONFIG_YAFFS_9BYTE_TAGS
+ etags->chunkDeleted = deleted;
+#else
+ etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
+#endif
+ return YAFFS_OK;
+}
+
+/* Mark a block bad.
+ *
+ * This is a persistant state.
+ * Use of this function should be rare.
+ *
+ * Returns YAFFS_OK or YAFFS_FAIL.
+ */
+int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
+{
+ struct mtd_info * mtd = dev->genericDevice;
+ int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
+ int retval;
+
+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
+
+ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
+}
+
+/* Check any MTD prerequists.
+ *
+ * Returns YAFFS_OK or YAFFS_FAIL.
+ */
+static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
+{
+ /* 2.6.18 has mtd->ecclayout->oobavail */
+ /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
+ int oobavail = mtd->ecclayout->oobavail;
+
+ if (oobavail < YTAG1_SIZE) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "mtd device has only %d bytes for tags, need %d",
+ oobavail, YTAG1_SIZE);
+ return YAFFS_FAIL;
+ }
+ return YAFFS_OK;
+}
+
+/* Query for the current state of a specific block.
+ *
+ * Examine the tags of the first chunk of the block and return the state:
+ * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
+ * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
+ * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
+ *
+ * Always returns YAFFS_OK.
+ */
+int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+ yaffs_BlockState * pState, int *pSequenceNumber)
+{
+ struct mtd_info * mtd = dev->genericDevice;
+ int chunkNo = blockNo * dev->nChunksPerBlock;
+ yaffs_ExtendedTags etags;
+ int state = YAFFS_BLOCK_STATE_DEAD;
+ int seqnum = 0;
+ int retval;
+
+ /* We don't yet have a good place to test for MTD config prerequists.
+ * Do it here as we are called during the initial scan.
+ */
+ if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
+ return YAFFS_FAIL;
+ }
+
+ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
+ if (etags.blockBad) {
+ yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
+ "block %d is marked bad", blockNo);
+ state = YAFFS_BLOCK_STATE_DEAD;
+ }
+ else if (etags.chunkUsed) {
+ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
+ seqnum = etags.sequenceNumber;
+ }
+ else {
+ state = YAFFS_BLOCK_STATE_EMPTY;
+ }
+
+ *pState = state;
+ *pSequenceNumber = seqnum;
+
+ /* query always succeeds */
+ return YAFFS_OK;
+}
+
+#endif /*KERNEL_VERSION*/
:(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
}
+#ifndef min
#define min(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
void
-qsort(void *aa, size_t n, size_t es, int (*cmp)(const void *, const void *))
+yaffs_qsort(void *aa, size_t n, size_t es,
+ int (*cmp)(const void *, const void *))
{
char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
int d, r, swaptype, swap_cnt;
r = min((long)(pd - pc), (long)(pn - pd - es));
vecswap(pb, pn - r, r);
if ((r = pb - pa) > es)
- qsort(a, r / es, es, cmp);
+ yaffs_qsort(a, r / es, es, cmp);
if ((r = pd - pc) > es) {
/* Iterate rather than recurse to save stack space */
a = pn - r;
n = r / es;
goto loop;
}
-/* qsort(pn - r, r / es, es, cmp);*/
+/* yaffs_qsort(pn - r, r / es, es, cmp);*/
}
#ifndef __YAFFS_QSORT_H__
#define __YAFFS_QSORT_H__
-extern void qsort (void *const base, size_t total_elems, size_t size,
+extern void yaffs_qsort (void *const base, size_t total_elems, size_t size,
int (*cmp)(const void *, const void *));
#endif
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
};
-static int yaffs_CountBits(__u8 x)
+int yaffs_CountBits(__u8 x)
{
int retVal;
retVal = yaffs_countBitsTable[x];
int blockNo, yaffs_BlockState *
state, int *sequenceNumber);
+void yaffs_CalcTagsECC(yaffs_Tags * tags);
+int yaffs_CheckECCOnTags(yaffs_Tags * tags);
+int yaffs_CountBits(__u8 byte);
+
#endif
#define TSTR(x) KERN_WARNING x
#define TOUT(p) printk p
+#define yaffs_trace(mask, fmt, args...) \
+ do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \
+ printk(KERN_WARNING "yaffs: " fmt, ## args); \
+ } while (0)
+
+#define compile_time_assertion(assertion) \
+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
+
#elif defined CONFIG_YAFFS_DIRECT
/* Direct interface */
#endif
-extern unsigned yaffs_traceMask;
+/* see yaffs_fs.c */
+extern unsigned int yaffs_traceMask;
+extern unsigned int yaffs_wr_attempts;
/*
* Tracing flags.