dissect yaffs patch
SVN-Revision: 9249
This commit is contained in:
Gabor Juhos
parent
2dd2d40b59
commit
1defe9a10c
36 changed files with 14870 additions and 45039 deletions
175
target/linux/generic-2.6/files/fs/yaffs2/Kconfig
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175
target/linux/generic-2.6/files/fs/yaffs2/Kconfig
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#
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# YAFFS file system configurations
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#
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config YAFFS_FS
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tristate "YAFFS2 file system support"
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default n
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depends on MTD
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select YAFFS_YAFFS1
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select YAFFS_YAFFS2
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help
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YAFFS2, or Yet Another Flash Filing System, is a filing system
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optimised for NAND Flash chips.
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To compile the YAFFS2 file system support as a module, choose M
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here: the module will be called yaffs2.
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If unsure, say N.
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Further information on YAFFS2 is available at
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<http://www.aleph1.co.uk/yaffs/>.
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config YAFFS_YAFFS1
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bool "512 byte / page devices"
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depends on YAFFS_FS
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default y
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help
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Enable YAFFS1 support -- yaffs for 512 byte / page devices
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Not needed for 2K-page devices.
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If unsure, say Y.
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config YAFFS_9BYTE_TAGS
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bool "Use older-style on-NAND data format with pageStatus byte"
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depends on YAFFS_YAFFS1
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default n
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help
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Older-style on-NAND data format has a "pageStatus" byte to record
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chunk/page state. This byte is zero when the page is discarded.
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Choose this option if you have existing on-NAND data using this
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format that you need to continue to support. New data written
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also uses the older-style format. Note: Use of this option
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generally requires that MTD's oob layout be adjusted to use the
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older-style format. See notes on tags formats and MTD versions.
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If unsure, say N.
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config YAFFS_DOES_ECC
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bool "Lets Yaffs do its own ECC"
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depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS
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default n
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help
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This enables Yaffs to use its own ECC functions instead of using
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the ones from the generic MTD-NAND driver.
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If unsure, say N.
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config YAFFS_ECC_WRONG_ORDER
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bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
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depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS
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default n
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help
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This makes yaffs_ecc.c use the same ecc byte order as Steven
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Hill's nand_ecc.c. If not set, then you get the same ecc byte
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order as SmartMedia.
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If unsure, say N.
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config YAFFS_YAFFS2
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bool "2048 byte (or larger) / page devices"
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depends on YAFFS_FS
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default y
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help
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Enable YAFFS2 support -- yaffs for >= 2K bytes per page devices
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If unsure, say Y.
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config YAFFS_AUTO_YAFFS2
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bool "Autoselect yaffs2 format"
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depends on YAFFS_YAFFS2
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default y
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help
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Without this, you need to explicitely use yaffs2 as the file
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system type. With this, you can say "yaffs" and yaffs or yaffs2
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will be used depending on the device page size (yaffs on
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512-byte page devices, yaffs2 on 2K page devices).
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If unsure, say Y.
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config YAFFS_DISABLE_LAZY_LOAD
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bool "Disable lazy loading"
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depends on YAFFS_YAFFS2
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default n
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help
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"Lazy loading" defers loading file details until they are
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required. This saves mount time, but makes the first look-up
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a bit longer.
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Lazy loading will only happen if enabled by this option being 'n'
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and if the appropriate tags are available, else yaffs2 will
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automatically fall back to immediate loading and do the right
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thing.
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Lazy laoding will be required by checkpointing.
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Setting this to 'y' will disable lazy loading.
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If unsure, say N.
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config YAFFS_CHECKPOINT_RESERVED_BLOCKS
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int "Reserved blocks for checkpointing"
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depends on YAFFS_YAFFS2
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default 10
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help
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Give the number of Blocks to reserve for checkpointing.
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Checkpointing saves the state at unmount so that mounting is
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much faster as a scan of all the flash to regenerate this state
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is not needed. These Blocks are reserved per partition, so if
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you have very small partitions the default (10) may be a mess
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for you. You can set this value to 0, but that does not mean
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checkpointing is disabled at all. There only won't be any
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specially reserved blocks for checkpointing, so if there is
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enough free space on the filesystem, it will be used for
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checkpointing.
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If unsure, leave at default (10), but don't wonder if there are
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always 2MB used on your large page device partition (10 x 2k
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pagesize). When using small partitions or when being very small
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on space, you probably want to set this to zero.
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config YAFFS_DISABLE_WIDE_TNODES
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bool "Turn off wide tnodes"
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depends on YAFFS_FS
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default n
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help
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Wide tnodes are only used for NAND arrays >=32MB for 512-byte
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page devices and >=128MB for 2k page devices. They use slightly
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more RAM but are faster since they eliminate chunk group
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searching.
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Setting this to 'y' will force tnode width to 16 bits and save
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memory but make large arrays slower.
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If unsure, say N.
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config YAFFS_ALWAYS_CHECK_CHUNK_ERASED
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bool "Force chunk erase check"
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depends on YAFFS_FS
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default n
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help
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Normally YAFFS only checks chunks before writing until an erased
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chunk is found. This helps to detect any partially written
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chunks that might have happened due to power loss.
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Enabling this forces on the test that chunks are erased in flash
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before writing to them. This takes more time but is potentially
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a bit more secure.
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Suggest setting Y during development and ironing out driver
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issues etc. Suggest setting to N if you want faster writing.
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If unsure, say Y.
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config YAFFS_SHORT_NAMES_IN_RAM
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bool "Cache short names in RAM"
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depends on YAFFS_FS
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default y
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help
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If this config is set, then short names are stored with the
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yaffs_Object. This costs an extra 16 bytes of RAM per object,
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but makes look-ups faster.
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If unsure, say Y.
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11
target/linux/generic-2.6/files/fs/yaffs2/Makefile
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11
target/linux/generic-2.6/files/fs/yaffs2/Makefile
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#
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# Makefile for the linux YAFFS filesystem routines.
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#
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obj-$(CONFIG_YAFFS_FS) += yaffs.o
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yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o
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yaffs-y += yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
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yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
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yaffs-y += yaffs_mtdif1.o yaffs_packedtags1.o
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yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o
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264
target/linux/generic-2.6/files/fs/yaffs2/devextras.h
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264
target/linux/generic-2.6/files/fs/yaffs2/devextras.h
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/*
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* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2007 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1 as
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* published by the Free Software Foundation.
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*
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* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
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*/
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/*
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* This file is just holds extra declarations used during development.
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* Most of these are from kernel includes placed here so we can use them in
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* applications.
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*
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*/
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#ifndef __EXTRAS_H__
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#define __EXTRAS_H__
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#if defined WIN32
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#define __inline__ __inline
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#define new newHack
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#endif
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#if !(defined __KERNEL__) || (defined WIN32)
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/* User space defines */
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typedef unsigned char __u8;
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typedef unsigned short __u16;
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typedef unsigned __u32;
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/*
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* Simple doubly linked list implementation.
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*
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* Some of the internal functions ("__xxx") are useful when
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* manipulating whole lists rather than single entries, as
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* sometimes we already know the next/prev entries and we can
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* generate better code by using them directly rather than
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* using the generic single-entry routines.
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*/
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#define prefetch(x) 1
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struct list_head {
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struct list_head *next, *prev;
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};
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#define LIST_HEAD_INIT(name) { &(name), &(name) }
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#define LIST_HEAD(name) \
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struct list_head name = LIST_HEAD_INIT(name)
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#define INIT_LIST_HEAD(ptr) do { \
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(ptr)->next = (ptr); (ptr)->prev = (ptr); \
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} while (0)
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/*
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* Insert a new entry between two known consecutive entries.
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*
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* This is only for internal list manipulation where we know
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* the prev/next entries already!
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*/
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static __inline__ void __list_add(struct list_head *new,
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struct list_head *prev,
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struct list_head *next)
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{
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next->prev = new;
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new->next = next;
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new->prev = prev;
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prev->next = new;
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}
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/**
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* list_add - add a new entry
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* @new: new entry to be added
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* @head: list head to add it after
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*
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* Insert a new entry after the specified head.
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* This is good for implementing stacks.
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*/
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static __inline__ void list_add(struct list_head *new, struct list_head *head)
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{
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__list_add(new, head, head->next);
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}
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/**
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* list_add_tail - add a new entry
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* @new: new entry to be added
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* @head: list head to add it before
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*
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* Insert a new entry before the specified head.
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* This is useful for implementing queues.
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*/
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static __inline__ void list_add_tail(struct list_head *new,
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struct list_head *head)
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{
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__list_add(new, head->prev, head);
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}
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/*
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* Delete a list entry by making the prev/next entries
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* point to each other.
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*
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* This is only for internal list manipulation where we know
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* the prev/next entries already!
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*/
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static __inline__ void __list_del(struct list_head *prev,
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struct list_head *next)
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{
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next->prev = prev;
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prev->next = next;
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}
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/**
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* list_del - deletes entry from list.
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* @entry: the element to delete from the list.
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* Note: list_empty on entry does not return true after this, the entry is
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* in an undefined state.
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*/
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static __inline__ void list_del(struct list_head *entry)
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{
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__list_del(entry->prev, entry->next);
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}
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/**
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* list_del_init - deletes entry from list and reinitialize it.
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* @entry: the element to delete from the list.
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*/
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static __inline__ void list_del_init(struct list_head *entry)
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{
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__list_del(entry->prev, entry->next);
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INIT_LIST_HEAD(entry);
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}
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/**
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* list_empty - tests whether a list is empty
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* @head: the list to test.
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*/
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static __inline__ int list_empty(struct list_head *head)
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{
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return head->next == head;
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}
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/**
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* list_splice - join two lists
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* @list: the new list to add.
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* @head: the place to add it in the first list.
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*/
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static __inline__ void list_splice(struct list_head *list,
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struct list_head *head)
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{
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struct list_head *first = list->next;
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if (first != list) {
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struct list_head *last = list->prev;
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struct list_head *at = head->next;
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first->prev = head;
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head->next = first;
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last->next = at;
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at->prev = last;
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}
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}
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/**
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* list_entry - get the struct for this entry
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* @ptr: the &struct list_head pointer.
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* @type: the type of the struct this is embedded in.
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* @member: the name of the list_struct within the struct.
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*/
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#define list_entry(ptr, type, member) \
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((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
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/**
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* list_for_each - iterate over a list
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* @pos: the &struct list_head to use as a loop counter.
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* @head: the head for your list.
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*/
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#define list_for_each(pos, head) \
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for (pos = (head)->next, prefetch(pos->next); pos != (head); \
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pos = pos->next, prefetch(pos->next))
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/**
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* list_for_each_safe - iterate over a list safe against removal
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* of list entry
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* @pos: the &struct list_head to use as a loop counter.
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* @n: another &struct list_head to use as temporary storage
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* @head: the head for your list.
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*/
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#define list_for_each_safe(pos, n, head) \
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for (pos = (head)->next, n = pos->next; pos != (head); \
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pos = n, n = pos->next)
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/*
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* File types
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*/
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#define DT_UNKNOWN 0
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#define DT_FIFO 1
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#define DT_CHR 2
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#define DT_DIR 4
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#define DT_BLK 6
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#define DT_REG 8
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#define DT_LNK 10
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#define DT_SOCK 12
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#define DT_WHT 14
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#ifndef WIN32
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#include <sys/stat.h>
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#endif
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/*
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* Attribute flags. These should be or-ed together to figure out what
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* has been changed!
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*/
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#define ATTR_MODE 1
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#define ATTR_UID 2
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#define ATTR_GID 4
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#define ATTR_SIZE 8
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#define ATTR_ATIME 16
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#define ATTR_MTIME 32
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#define ATTR_CTIME 64
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#define ATTR_ATIME_SET 128
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#define ATTR_MTIME_SET 256
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#define ATTR_FORCE 512 /* Not a change, but a change it */
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#define ATTR_ATTR_FLAG 1024
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struct iattr {
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unsigned int ia_valid;
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unsigned ia_mode;
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unsigned ia_uid;
|
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unsigned ia_gid;
|
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unsigned ia_size;
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unsigned ia_atime;
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unsigned ia_mtime;
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unsigned ia_ctime;
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unsigned int ia_attr_flags;
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};
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#define KERN_DEBUG
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#else
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#ifndef WIN32
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/fs.h>
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#include <linux/stat.h>
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#endif
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#endif
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#if defined WIN32
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#undef new
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#endif
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#endif
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65
target/linux/generic-2.6/files/fs/yaffs2/moduleconfig.h
Normal file
65
target/linux/generic-2.6/files/fs/yaffs2/moduleconfig.h
Normal file
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/*
|
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* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
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*
|
||||
* Created by Martin Fouts <Martin.Fouts@palmsource.com>
|
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*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
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#ifndef __YAFFS_CONFIG_H__
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#define __YAFFS_CONFIG_H__
|
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|
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#ifdef YAFFS_OUT_OF_TREE
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|
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/* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */
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#define CONFIG_YAFFS_FS
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#define CONFIG_YAFFS_YAFFS1
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#define CONFIG_YAFFS_YAFFS2
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|
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/* These options are independent of each other. Select those that matter. */
|
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|
||||
/* Default: Not selected */
|
||||
/* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
|
||||
//#define CONFIG_YAFFS_DOES_ECC
|
||||
|
||||
/* Default: Not selected */
|
||||
/* Meaning: ECC byte order is 'wrong'. Only meaningful if */
|
||||
/* CONFIG_YAFFS_DOES_ECC is set */
|
||||
//#define CONFIG_YAFFS_ECC_WRONG_ORDER
|
||||
|
||||
/* Default: Selected */
|
||||
/* Meaning: Disables testing whether chunks are erased before writing to them*/
|
||||
#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
|
||||
|
||||
/* Default: Selected */
|
||||
/* Meaning: Cache short names, taking more RAM, but faster look-ups */
|
||||
#define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
|
||||
|
||||
/* Default: 10 */
|
||||
/* Meaning: set the count of blocks to reserve for checkpointing */
|
||||
#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 */
|
||||
|
||||
#endif /* __YAFFS_CONFIG_H__ */
|
||||
404
target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.c
Normal file
404
target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.c
Normal file
|
|
@ -0,0 +1,404 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
const char *yaffs_checkptrw_c_version =
|
||||
"$Id$";
|
||||
|
||||
|
||||
#include "yaffs_checkptrw.h"
|
||||
|
||||
|
||||
static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
|
||||
{
|
||||
|
||||
int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
|
||||
|
||||
T(YAFFS_TRACE_CHECKPOINT,
|
||||
(TSTR("checkpt blocks available = %d" TENDSTR),
|
||||
blocksAvailable));
|
||||
|
||||
|
||||
return (blocksAvailable <= 0) ? 0 : 1;
|
||||
}
|
||||
|
||||
|
||||
static int yaffs_CheckpointErase(yaffs_Device *dev)
|
||||
{
|
||||
|
||||
int i;
|
||||
|
||||
|
||||
if(!dev->eraseBlockInNAND)
|
||||
return 0;
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("checking blocks %d to %d"TENDSTR),
|
||||
dev->internalStartBlock,dev->internalEndBlock));
|
||||
|
||||
for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
|
||||
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
|
||||
if(bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT){
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("erasing checkpt block %d"TENDSTR),i));
|
||||
if(dev->eraseBlockInNAND(dev,i- dev->blockOffset /* realign */)){
|
||||
bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
|
||||
dev->nErasedBlocks++;
|
||||
dev->nFreeChunks += dev->nChunksPerBlock;
|
||||
}
|
||||
else {
|
||||
dev->markNANDBlockBad(dev,i);
|
||||
bi->blockState = YAFFS_BLOCK_STATE_DEAD;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
dev->blocksInCheckpoint = 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
|
||||
{
|
||||
int i;
|
||||
int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
|
||||
T(YAFFS_TRACE_CHECKPOINT,
|
||||
(TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
|
||||
dev->nErasedBlocks,dev->nReservedBlocks,blocksAvailable,dev->checkpointNextBlock));
|
||||
|
||||
if(dev->checkpointNextBlock >= 0 &&
|
||||
dev->checkpointNextBlock <= dev->internalEndBlock &&
|
||||
blocksAvailable > 0){
|
||||
|
||||
for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){
|
||||
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
|
||||
if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY){
|
||||
dev->checkpointNextBlock = i + 1;
|
||||
dev->checkpointCurrentBlock = i;
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("allocating checkpt block %d"TENDSTR),i));
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("out of checkpt blocks"TENDSTR)));
|
||||
|
||||
dev->checkpointNextBlock = -1;
|
||||
dev->checkpointCurrentBlock = -1;
|
||||
}
|
||||
|
||||
static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
|
||||
{
|
||||
int i;
|
||||
yaffs_ExtendedTags tags;
|
||||
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR),
|
||||
dev->blocksInCheckpoint, dev->checkpointNextBlock));
|
||||
|
||||
if(dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
|
||||
for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){
|
||||
int chunk = i * dev->nChunksPerBlock;
|
||||
int realignedChunk = chunk - dev->chunkOffset;
|
||||
|
||||
dev->readChunkWithTagsFromNAND(dev,realignedChunk,NULL,&tags);
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
|
||||
i, tags.objectId,tags.sequenceNumber,tags.eccResult));
|
||||
|
||||
if(tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA){
|
||||
/* Right kind of block */
|
||||
dev->checkpointNextBlock = tags.objectId;
|
||||
dev->checkpointCurrentBlock = i;
|
||||
dev->checkpointBlockList[dev->blocksInCheckpoint] = i;
|
||||
dev->blocksInCheckpoint++;
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("found checkpt block %d"TENDSTR),i));
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("found no more checkpt blocks"TENDSTR)));
|
||||
|
||||
dev->checkpointNextBlock = -1;
|
||||
dev->checkpointCurrentBlock = -1;
|
||||
}
|
||||
|
||||
|
||||
int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
|
||||
{
|
||||
|
||||
/* Got the functions we need? */
|
||||
if (!dev->writeChunkWithTagsToNAND ||
|
||||
!dev->readChunkWithTagsFromNAND ||
|
||||
!dev->eraseBlockInNAND ||
|
||||
!dev->markNANDBlockBad)
|
||||
return 0;
|
||||
|
||||
if(forWriting && !yaffs_CheckpointSpaceOk(dev))
|
||||
return 0;
|
||||
|
||||
if(!dev->checkpointBuffer)
|
||||
dev->checkpointBuffer = YMALLOC_DMA(dev->nDataBytesPerChunk);
|
||||
if(!dev->checkpointBuffer)
|
||||
return 0;
|
||||
|
||||
|
||||
dev->checkpointPageSequence = 0;
|
||||
|
||||
dev->checkpointOpenForWrite = forWriting;
|
||||
|
||||
dev->checkpointByteCount = 0;
|
||||
dev->checkpointSum = 0;
|
||||
dev->checkpointXor = 0;
|
||||
dev->checkpointCurrentBlock = -1;
|
||||
dev->checkpointCurrentChunk = -1;
|
||||
dev->checkpointNextBlock = dev->internalStartBlock;
|
||||
|
||||
/* Erase all the blocks in the checkpoint area */
|
||||
if(forWriting){
|
||||
memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk);
|
||||
dev->checkpointByteOffset = 0;
|
||||
return yaffs_CheckpointErase(dev);
|
||||
|
||||
|
||||
} else {
|
||||
int i;
|
||||
/* Set to a value that will kick off a read */
|
||||
dev->checkpointByteOffset = dev->nDataBytesPerChunk;
|
||||
/* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully)
|
||||
* going to be way more than we need */
|
||||
dev->blocksInCheckpoint = 0;
|
||||
dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
|
||||
dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
|
||||
for(i = 0; i < dev->checkpointMaxBlocks; i++)
|
||||
dev->checkpointBlockList[i] = -1;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
|
||||
{
|
||||
__u32 compositeSum;
|
||||
compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
|
||||
*sum = compositeSum;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
|
||||
{
|
||||
|
||||
int chunk;
|
||||
int realignedChunk;
|
||||
|
||||
yaffs_ExtendedTags tags;
|
||||
|
||||
if(dev->checkpointCurrentBlock < 0){
|
||||
yaffs_CheckpointFindNextErasedBlock(dev);
|
||||
dev->checkpointCurrentChunk = 0;
|
||||
}
|
||||
|
||||
if(dev->checkpointCurrentBlock < 0)
|
||||
return 0;
|
||||
|
||||
tags.chunkDeleted = 0;
|
||||
tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */
|
||||
tags.chunkId = dev->checkpointPageSequence + 1;
|
||||
tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA;
|
||||
tags.byteCount = dev->nDataBytesPerChunk;
|
||||
if(dev->checkpointCurrentChunk == 0){
|
||||
/* First chunk we write for the block? Set block state to
|
||||
checkpoint */
|
||||
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointCurrentBlock);
|
||||
bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
|
||||
dev->blocksInCheckpoint++;
|
||||
}
|
||||
|
||||
chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
|
||||
|
||||
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
|
||||
chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk,tags.objectId,tags.chunkId));
|
||||
|
||||
realignedChunk = chunk - dev->chunkOffset;
|
||||
|
||||
dev->writeChunkWithTagsToNAND(dev,realignedChunk,dev->checkpointBuffer,&tags);
|
||||
dev->checkpointByteOffset = 0;
|
||||
dev->checkpointPageSequence++;
|
||||
dev->checkpointCurrentChunk++;
|
||||
if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock){
|
||||
dev->checkpointCurrentChunk = 0;
|
||||
dev->checkpointCurrentBlock = -1;
|
||||
}
|
||||
memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes)
|
||||
{
|
||||
int i=0;
|
||||
int ok = 1;
|
||||
|
||||
|
||||
__u8 * dataBytes = (__u8 *)data;
|
||||
|
||||
|
||||
|
||||
if(!dev->checkpointBuffer)
|
||||
return 0;
|
||||
|
||||
if(!dev->checkpointOpenForWrite)
|
||||
return -1;
|
||||
|
||||
while(i < nBytes && ok) {
|
||||
|
||||
|
||||
|
||||
dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ;
|
||||
dev->checkpointSum += *dataBytes;
|
||||
dev->checkpointXor ^= *dataBytes;
|
||||
|
||||
dev->checkpointByteOffset++;
|
||||
i++;
|
||||
dataBytes++;
|
||||
dev->checkpointByteCount++;
|
||||
|
||||
|
||||
if(dev->checkpointByteOffset < 0 ||
|
||||
dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
|
||||
ok = yaffs_CheckpointFlushBuffer(dev);
|
||||
|
||||
}
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
|
||||
{
|
||||
int i=0;
|
||||
int ok = 1;
|
||||
yaffs_ExtendedTags tags;
|
||||
|
||||
|
||||
int chunk;
|
||||
int realignedChunk;
|
||||
|
||||
__u8 *dataBytes = (__u8 *)data;
|
||||
|
||||
if(!dev->checkpointBuffer)
|
||||
return 0;
|
||||
|
||||
if(dev->checkpointOpenForWrite)
|
||||
return -1;
|
||||
|
||||
while(i < nBytes && ok) {
|
||||
|
||||
|
||||
if(dev->checkpointByteOffset < 0 ||
|
||||
dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
|
||||
|
||||
if(dev->checkpointCurrentBlock < 0){
|
||||
yaffs_CheckpointFindNextCheckpointBlock(dev);
|
||||
dev->checkpointCurrentChunk = 0;
|
||||
}
|
||||
|
||||
if(dev->checkpointCurrentBlock < 0)
|
||||
ok = 0;
|
||||
else {
|
||||
|
||||
chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock +
|
||||
dev->checkpointCurrentChunk;
|
||||
|
||||
realignedChunk = chunk - dev->chunkOffset;
|
||||
|
||||
/* read in the next chunk */
|
||||
/* printf("read checkpoint page %d\n",dev->checkpointPage); */
|
||||
dev->readChunkWithTagsFromNAND(dev, realignedChunk,
|
||||
dev->checkpointBuffer,
|
||||
&tags);
|
||||
|
||||
if(tags.chunkId != (dev->checkpointPageSequence + 1) ||
|
||||
tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA)
|
||||
ok = 0;
|
||||
|
||||
dev->checkpointByteOffset = 0;
|
||||
dev->checkpointPageSequence++;
|
||||
dev->checkpointCurrentChunk++;
|
||||
|
||||
if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
|
||||
dev->checkpointCurrentBlock = -1;
|
||||
}
|
||||
}
|
||||
|
||||
if(ok){
|
||||
*dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset];
|
||||
dev->checkpointSum += *dataBytes;
|
||||
dev->checkpointXor ^= *dataBytes;
|
||||
dev->checkpointByteOffset++;
|
||||
i++;
|
||||
dataBytes++;
|
||||
dev->checkpointByteCount++;
|
||||
}
|
||||
}
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
int yaffs_CheckpointClose(yaffs_Device *dev)
|
||||
{
|
||||
|
||||
if(dev->checkpointOpenForWrite){
|
||||
if(dev->checkpointByteOffset != 0)
|
||||
yaffs_CheckpointFlushBuffer(dev);
|
||||
} else {
|
||||
int i;
|
||||
for(i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++){
|
||||
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointBlockList[i]);
|
||||
if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
|
||||
bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
|
||||
else {
|
||||
// Todo this looks odd...
|
||||
}
|
||||
}
|
||||
YFREE(dev->checkpointBlockList);
|
||||
dev->checkpointBlockList = NULL;
|
||||
}
|
||||
|
||||
dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
|
||||
dev->nErasedBlocks -= dev->blocksInCheckpoint;
|
||||
|
||||
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint byte count %d" TENDSTR),
|
||||
dev->checkpointByteCount));
|
||||
|
||||
if(dev->checkpointBuffer){
|
||||
/* free the buffer */
|
||||
YFREE(dev->checkpointBuffer);
|
||||
dev->checkpointBuffer = NULL;
|
||||
return 1;
|
||||
}
|
||||
else
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
|
||||
{
|
||||
/* Erase the first checksum block */
|
||||
|
||||
T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint invalidate"TENDSTR)));
|
||||
|
||||
if(!yaffs_CheckpointSpaceOk(dev))
|
||||
return 0;
|
||||
|
||||
return yaffs_CheckpointErase(dev);
|
||||
}
|
||||
|
||||
|
||||
|
||||
35
target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.h
Normal file
35
target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.h
Normal file
|
|
@ -0,0 +1,35 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
#ifndef __YAFFS_CHECKPTRW_H__
|
||||
#define __YAFFS_CHECKPTRW_H__
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
|
||||
int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting);
|
||||
|
||||
int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes);
|
||||
|
||||
int yaffs_CheckpointRead(yaffs_Device *dev,void *data, int nBytes);
|
||||
|
||||
int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
|
||||
|
||||
int yaffs_CheckpointClose(yaffs_Device *dev);
|
||||
|
||||
int yaffs_CheckpointInvalidateStream(yaffs_Device *dev);
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
331
target/linux/generic-2.6/files/fs/yaffs2/yaffs_ecc.c
Normal file
331
target/linux/generic-2.6/files/fs/yaffs2/yaffs_ecc.c
Normal file
|
|
@ -0,0 +1,331 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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 code implements the ECC algorithm used in SmartMedia.
|
||||
*
|
||||
* The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
|
||||
* The two unused bit are set to 1.
|
||||
* The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
|
||||
* blocks are used on a 512-byte NAND page.
|
||||
*
|
||||
*/
|
||||
|
||||
/* Table generated by gen-ecc.c
|
||||
* Using a table means we do not have to calculate p1..p4 and p1'..p4'
|
||||
* for each byte of data. These are instead provided in a table in bits7..2.
|
||||
* Bit 0 of each entry indicates whether the entry has an odd or even parity, and therefore
|
||||
* this bytes influence on the line parity.
|
||||
*/
|
||||
|
||||
const char *yaffs_ecc_c_version =
|
||||
"$Id$";
|
||||
|
||||
#include "yportenv.h"
|
||||
|
||||
#include "yaffs_ecc.h"
|
||||
|
||||
static const unsigned char column_parity_table[] = {
|
||||
0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
|
||||
0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
|
||||
0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
|
||||
0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
|
||||
0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
|
||||
0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
|
||||
0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
|
||||
0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
|
||||
0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
|
||||
0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
|
||||
0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
|
||||
0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
|
||||
0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
|
||||
0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
|
||||
0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
|
||||
0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
|
||||
0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
|
||||
0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
|
||||
0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
|
||||
0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
|
||||
0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
|
||||
0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
|
||||
0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
|
||||
0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
|
||||
0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
|
||||
0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
|
||||
0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
|
||||
0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
|
||||
0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
|
||||
0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
|
||||
0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
|
||||
0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
|
||||
};
|
||||
|
||||
/* Count the bits in an unsigned char or a U32 */
|
||||
|
||||
static int yaffs_CountBits(unsigned char x)
|
||||
{
|
||||
int r = 0;
|
||||
while (x) {
|
||||
if (x & 1)
|
||||
r++;
|
||||
x >>= 1;
|
||||
}
|
||||
return r;
|
||||
}
|
||||
|
||||
static int yaffs_CountBits32(unsigned x)
|
||||
{
|
||||
int r = 0;
|
||||
while (x) {
|
||||
if (x & 1)
|
||||
r++;
|
||||
x >>= 1;
|
||||
}
|
||||
return r;
|
||||
}
|
||||
|
||||
/* Calculate the ECC for a 256-byte block of data */
|
||||
void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
unsigned char col_parity = 0;
|
||||
unsigned char line_parity = 0;
|
||||
unsigned char line_parity_prime = 0;
|
||||
unsigned char t;
|
||||
unsigned char b;
|
||||
|
||||
for (i = 0; i < 256; i++) {
|
||||
b = column_parity_table[*data++];
|
||||
col_parity ^= b;
|
||||
|
||||
if (b & 0x01) // odd number of bits in the byte
|
||||
{
|
||||
line_parity ^= i;
|
||||
line_parity_prime ^= ~i;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
ecc[2] = (~col_parity) | 0x03;
|
||||
|
||||
t = 0;
|
||||
if (line_parity & 0x80)
|
||||
t |= 0x80;
|
||||
if (line_parity_prime & 0x80)
|
||||
t |= 0x40;
|
||||
if (line_parity & 0x40)
|
||||
t |= 0x20;
|
||||
if (line_parity_prime & 0x40)
|
||||
t |= 0x10;
|
||||
if (line_parity & 0x20)
|
||||
t |= 0x08;
|
||||
if (line_parity_prime & 0x20)
|
||||
t |= 0x04;
|
||||
if (line_parity & 0x10)
|
||||
t |= 0x02;
|
||||
if (line_parity_prime & 0x10)
|
||||
t |= 0x01;
|
||||
ecc[1] = ~t;
|
||||
|
||||
t = 0;
|
||||
if (line_parity & 0x08)
|
||||
t |= 0x80;
|
||||
if (line_parity_prime & 0x08)
|
||||
t |= 0x40;
|
||||
if (line_parity & 0x04)
|
||||
t |= 0x20;
|
||||
if (line_parity_prime & 0x04)
|
||||
t |= 0x10;
|
||||
if (line_parity & 0x02)
|
||||
t |= 0x08;
|
||||
if (line_parity_prime & 0x02)
|
||||
t |= 0x04;
|
||||
if (line_parity & 0x01)
|
||||
t |= 0x02;
|
||||
if (line_parity_prime & 0x01)
|
||||
t |= 0x01;
|
||||
ecc[0] = ~t;
|
||||
|
||||
#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
|
||||
// Swap the bytes into the wrong order
|
||||
t = ecc[0];
|
||||
ecc[0] = ecc[1];
|
||||
ecc[1] = t;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/* Correct the ECC on a 256 byte block of data */
|
||||
|
||||
int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
|
||||
const unsigned char *test_ecc)
|
||||
{
|
||||
unsigned char d0, d1, d2; /* deltas */
|
||||
|
||||
d0 = read_ecc[0] ^ test_ecc[0];
|
||||
d1 = read_ecc[1] ^ test_ecc[1];
|
||||
d2 = read_ecc[2] ^ test_ecc[2];
|
||||
|
||||
if ((d0 | d1 | d2) == 0)
|
||||
return 0; /* no error */
|
||||
|
||||
if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&
|
||||
((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&
|
||||
((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {
|
||||
/* Single bit (recoverable) error in data */
|
||||
|
||||
unsigned byte;
|
||||
unsigned bit;
|
||||
|
||||
#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
|
||||
// swap the bytes to correct for the wrong order
|
||||
unsigned char t;
|
||||
|
||||
t = d0;
|
||||
d0 = d1;
|
||||
d1 = t;
|
||||
#endif
|
||||
|
||||
bit = byte = 0;
|
||||
|
||||
if (d1 & 0x80)
|
||||
byte |= 0x80;
|
||||
if (d1 & 0x20)
|
||||
byte |= 0x40;
|
||||
if (d1 & 0x08)
|
||||
byte |= 0x20;
|
||||
if (d1 & 0x02)
|
||||
byte |= 0x10;
|
||||
if (d0 & 0x80)
|
||||
byte |= 0x08;
|
||||
if (d0 & 0x20)
|
||||
byte |= 0x04;
|
||||
if (d0 & 0x08)
|
||||
byte |= 0x02;
|
||||
if (d0 & 0x02)
|
||||
byte |= 0x01;
|
||||
|
||||
if (d2 & 0x80)
|
||||
bit |= 0x04;
|
||||
if (d2 & 0x20)
|
||||
bit |= 0x02;
|
||||
if (d2 & 0x08)
|
||||
bit |= 0x01;
|
||||
|
||||
data[byte] ^= (1 << bit);
|
||||
|
||||
return 1; /* Corrected the error */
|
||||
}
|
||||
|
||||
if ((yaffs_CountBits(d0) +
|
||||
yaffs_CountBits(d1) +
|
||||
yaffs_CountBits(d2)) == 1) {
|
||||
/* Reccoverable error in ecc */
|
||||
|
||||
read_ecc[0] = test_ecc[0];
|
||||
read_ecc[1] = test_ecc[1];
|
||||
read_ecc[2] = test_ecc[2];
|
||||
|
||||
return 1; /* Corrected the error */
|
||||
}
|
||||
|
||||
/* Unrecoverable error */
|
||||
|
||||
return -1;
|
||||
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* ECCxxxOther does ECC calcs on arbitrary n bytes of data
|
||||
*/
|
||||
void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
|
||||
yaffs_ECCOther * eccOther)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
unsigned char col_parity = 0;
|
||||
unsigned line_parity = 0;
|
||||
unsigned line_parity_prime = 0;
|
||||
unsigned char b;
|
||||
|
||||
for (i = 0; i < nBytes; i++) {
|
||||
b = column_parity_table[*data++];
|
||||
col_parity ^= b;
|
||||
|
||||
if (b & 0x01) {
|
||||
/* odd number of bits in the byte */
|
||||
line_parity ^= i;
|
||||
line_parity_prime ^= ~i;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
eccOther->colParity = (col_parity >> 2) & 0x3f;
|
||||
eccOther->lineParity = line_parity;
|
||||
eccOther->lineParityPrime = line_parity_prime;
|
||||
}
|
||||
|
||||
int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
|
||||
yaffs_ECCOther * read_ecc,
|
||||
const yaffs_ECCOther * test_ecc)
|
||||
{
|
||||
unsigned char cDelta; /* column parity delta */
|
||||
unsigned lDelta; /* line parity delta */
|
||||
unsigned lDeltaPrime; /* line parity delta */
|
||||
unsigned bit;
|
||||
|
||||
cDelta = read_ecc->colParity ^ test_ecc->colParity;
|
||||
lDelta = read_ecc->lineParity ^ test_ecc->lineParity;
|
||||
lDeltaPrime = read_ecc->lineParityPrime ^ test_ecc->lineParityPrime;
|
||||
|
||||
if ((cDelta | lDelta | lDeltaPrime) == 0)
|
||||
return 0; /* no error */
|
||||
|
||||
if (lDelta == ~lDeltaPrime &&
|
||||
(((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15))
|
||||
{
|
||||
/* Single bit (recoverable) error in data */
|
||||
|
||||
bit = 0;
|
||||
|
||||
if (cDelta & 0x20)
|
||||
bit |= 0x04;
|
||||
if (cDelta & 0x08)
|
||||
bit |= 0x02;
|
||||
if (cDelta & 0x02)
|
||||
bit |= 0x01;
|
||||
|
||||
if(lDelta >= nBytes)
|
||||
return -1;
|
||||
|
||||
data[lDelta] ^= (1 << bit);
|
||||
|
||||
return 1; /* corrected */
|
||||
}
|
||||
|
||||
if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) +
|
||||
yaffs_CountBits(cDelta)) == 1) {
|
||||
/* Reccoverable error in ecc */
|
||||
|
||||
*read_ecc = *test_ecc;
|
||||
return 1; /* corrected */
|
||||
}
|
||||
|
||||
/* Unrecoverable error */
|
||||
|
||||
return -1;
|
||||
|
||||
}
|
||||
|
||||
44
target/linux/generic-2.6/files/fs/yaffs2/yaffs_ecc.h
Normal file
44
target/linux/generic-2.6/files/fs/yaffs2/yaffs_ecc.h
Normal file
|
|
@ -0,0 +1,44 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
/*
|
||||
* This code implements the ECC algorithm used in SmartMedia.
|
||||
*
|
||||
* The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
|
||||
* The two unused bit are set to 1.
|
||||
* The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
|
||||
* blocks are used on a 512-byte NAND page.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef __YAFFS_ECC_H__
|
||||
#define __YAFFS_ECC_H__
|
||||
|
||||
typedef struct {
|
||||
unsigned char colParity;
|
||||
unsigned lineParity;
|
||||
unsigned lineParityPrime;
|
||||
} yaffs_ECCOther;
|
||||
|
||||
void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc);
|
||||
int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc,
|
||||
const unsigned char *test_ecc);
|
||||
|
||||
void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes,
|
||||
yaffs_ECCOther * ecc);
|
||||
int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes,
|
||||
yaffs_ECCOther * read_ecc,
|
||||
const yaffs_ECCOther * test_ecc);
|
||||
#endif
|
||||
2278
target/linux/generic-2.6/files/fs/yaffs2/yaffs_fs.c
Normal file
2278
target/linux/generic-2.6/files/fs/yaffs2/yaffs_fs.c
Normal file
File diff suppressed because it is too large
Load diff
7469
target/linux/generic-2.6/files/fs/yaffs2/yaffs_guts.c
Normal file
7469
target/linux/generic-2.6/files/fs/yaffs2/yaffs_guts.c
Normal file
File diff suppressed because it is too large
Load diff
902
target/linux/generic-2.6/files/fs/yaffs2/yaffs_guts.h
Normal file
902
target/linux/generic-2.6/files/fs/yaffs2/yaffs_guts.h
Normal file
|
|
@ -0,0 +1,902 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
#ifndef __YAFFS_GUTS_H__
|
||||
#define __YAFFS_GUTS_H__
|
||||
|
||||
#include "devextras.h"
|
||||
#include "yportenv.h"
|
||||
|
||||
#define YAFFS_OK 1
|
||||
#define YAFFS_FAIL 0
|
||||
|
||||
/* Give us a Y=0x59,
|
||||
* Give us an A=0x41,
|
||||
* Give us an FF=0xFF
|
||||
* Give us an S=0x53
|
||||
* And what have we got...
|
||||
*/
|
||||
#define YAFFS_MAGIC 0x5941FF53
|
||||
|
||||
#define YAFFS_NTNODES_LEVEL0 16
|
||||
#define YAFFS_TNODES_LEVEL0_BITS 4
|
||||
#define YAFFS_TNODES_LEVEL0_MASK 0xf
|
||||
|
||||
#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2)
|
||||
#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1)
|
||||
#define YAFFS_TNODES_INTERNAL_MASK 0x7
|
||||
#define YAFFS_TNODES_MAX_LEVEL 6
|
||||
|
||||
#ifndef CONFIG_YAFFS_NO_YAFFS1
|
||||
#define YAFFS_BYTES_PER_SPARE 16
|
||||
#define YAFFS_BYTES_PER_CHUNK 512
|
||||
#define YAFFS_CHUNK_SIZE_SHIFT 9
|
||||
#define YAFFS_CHUNKS_PER_BLOCK 32
|
||||
#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK)
|
||||
#endif
|
||||
|
||||
#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024
|
||||
#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32
|
||||
|
||||
#define YAFFS_MAX_CHUNK_ID 0x000FFFFF
|
||||
|
||||
#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
|
||||
|
||||
#define YAFFS_ALLOCATION_NOBJECTS 100
|
||||
#define YAFFS_ALLOCATION_NTNODES 100
|
||||
#define YAFFS_ALLOCATION_NLINKS 100
|
||||
|
||||
#define YAFFS_NOBJECT_BUCKETS 256
|
||||
|
||||
|
||||
#define YAFFS_OBJECT_SPACE 0x40000
|
||||
|
||||
#define YAFFS_CHECKPOINT_VERSION 3
|
||||
|
||||
#ifdef CONFIG_YAFFS_UNICODE
|
||||
#define YAFFS_MAX_NAME_LENGTH 127
|
||||
#define YAFFS_MAX_ALIAS_LENGTH 79
|
||||
#else
|
||||
#define YAFFS_MAX_NAME_LENGTH 255
|
||||
#define YAFFS_MAX_ALIAS_LENGTH 159
|
||||
#endif
|
||||
|
||||
#define YAFFS_SHORT_NAME_LENGTH 15
|
||||
|
||||
/* Some special object ids for pseudo objects */
|
||||
#define YAFFS_OBJECTID_ROOT 1
|
||||
#define YAFFS_OBJECTID_LOSTNFOUND 2
|
||||
#define YAFFS_OBJECTID_UNLINKED 3
|
||||
#define YAFFS_OBJECTID_DELETED 4
|
||||
|
||||
/* Sseudo object ids for checkpointing */
|
||||
#define YAFFS_OBJECTID_SB_HEADER 0x10
|
||||
#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
|
||||
#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
|
||||
|
||||
/* */
|
||||
|
||||
#define YAFFS_MAX_SHORT_OP_CACHES 20
|
||||
|
||||
#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
|
||||
* special purposes.
|
||||
* EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years,
|
||||
* and is a larger number than the lifetime of a 2GB device.
|
||||
*/
|
||||
#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000
|
||||
#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00
|
||||
|
||||
/* ChunkCache is used for short read/write operations.*/
|
||||
typedef struct {
|
||||
struct yaffs_ObjectStruct *object;
|
||||
int chunkId;
|
||||
int lastUse;
|
||||
int dirty;
|
||||
int nBytes; /* Only valid if the cache is dirty */
|
||||
int locked; /* Can't push out or flush while locked. */
|
||||
#ifdef CONFIG_YAFFS_YAFFS2
|
||||
__u8 *data;
|
||||
#else
|
||||
__u8 data[YAFFS_BYTES_PER_CHUNK];
|
||||
#endif
|
||||
} yaffs_ChunkCache;
|
||||
|
||||
|
||||
|
||||
/* Tags structures in RAM
|
||||
* NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise
|
||||
* the structure size will get blown out.
|
||||
*/
|
||||
|
||||
#ifndef CONFIG_YAFFS_NO_YAFFS1
|
||||
typedef struct {
|
||||
unsigned chunkId:20;
|
||||
unsigned serialNumber:2;
|
||||
unsigned byteCount:10;
|
||||
unsigned objectId:18;
|
||||
unsigned ecc:12;
|
||||
unsigned unusedStuff:2;
|
||||
|
||||
} yaffs_Tags;
|
||||
|
||||
typedef union {
|
||||
yaffs_Tags asTags;
|
||||
__u8 asBytes[8];
|
||||
} yaffs_TagsUnion;
|
||||
|
||||
#endif
|
||||
|
||||
/* Stuff used for extended tags in YAFFS2 */
|
||||
|
||||
typedef enum {
|
||||
YAFFS_ECC_RESULT_UNKNOWN,
|
||||
YAFFS_ECC_RESULT_NO_ERROR,
|
||||
YAFFS_ECC_RESULT_FIXED,
|
||||
YAFFS_ECC_RESULT_UNFIXED
|
||||
} yaffs_ECCResult;
|
||||
|
||||
typedef enum {
|
||||
YAFFS_OBJECT_TYPE_UNKNOWN,
|
||||
YAFFS_OBJECT_TYPE_FILE,
|
||||
YAFFS_OBJECT_TYPE_SYMLINK,
|
||||
YAFFS_OBJECT_TYPE_DIRECTORY,
|
||||
YAFFS_OBJECT_TYPE_HARDLINK,
|
||||
YAFFS_OBJECT_TYPE_SPECIAL
|
||||
} yaffs_ObjectType;
|
||||
|
||||
#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL
|
||||
|
||||
typedef struct {
|
||||
|
||||
unsigned validMarker0;
|
||||
unsigned chunkUsed; /* Status of the chunk: used or unused */
|
||||
unsigned objectId; /* If 0 then this is not part of an object (unused) */
|
||||
unsigned chunkId; /* If 0 then this is a header, else a data chunk */
|
||||
unsigned byteCount; /* Only valid for data chunks */
|
||||
|
||||
/* The following stuff only has meaning when we read */
|
||||
yaffs_ECCResult eccResult;
|
||||
unsigned blockBad;
|
||||
|
||||
/* YAFFS 1 stuff */
|
||||
unsigned chunkDeleted; /* The chunk is marked deleted */
|
||||
unsigned serialNumber; /* Yaffs1 2-bit serial number */
|
||||
|
||||
/* YAFFS2 stuff */
|
||||
unsigned sequenceNumber; /* The sequence number of this block */
|
||||
|
||||
/* Extra info if this is an object header (YAFFS2 only) */
|
||||
|
||||
unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */
|
||||
unsigned extraParentObjectId; /* The parent object */
|
||||
unsigned extraIsShrinkHeader; /* Is it a shrink header? */
|
||||
unsigned extraShadows; /* Does this shadow another object? */
|
||||
|
||||
yaffs_ObjectType extraObjectType; /* What object type? */
|
||||
|
||||
unsigned extraFileLength; /* Length if it is a file */
|
||||
unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */
|
||||
|
||||
unsigned validMarker1;
|
||||
|
||||
} yaffs_ExtendedTags;
|
||||
|
||||
/* Spare structure for YAFFS1 */
|
||||
typedef struct {
|
||||
__u8 tagByte0;
|
||||
__u8 tagByte1;
|
||||
__u8 tagByte2;
|
||||
__u8 tagByte3;
|
||||
__u8 pageStatus; /* set to 0 to delete the chunk */
|
||||
__u8 blockStatus;
|
||||
__u8 tagByte4;
|
||||
__u8 tagByte5;
|
||||
__u8 ecc1[3];
|
||||
__u8 tagByte6;
|
||||
__u8 tagByte7;
|
||||
__u8 ecc2[3];
|
||||
} yaffs_Spare;
|
||||
|
||||
/*Special structure for passing through to mtd */
|
||||
struct yaffs_NANDSpare {
|
||||
yaffs_Spare spare;
|
||||
int eccres1;
|
||||
int eccres2;
|
||||
};
|
||||
|
||||
/* Block data in RAM */
|
||||
|
||||
typedef enum {
|
||||
YAFFS_BLOCK_STATE_UNKNOWN = 0,
|
||||
|
||||
YAFFS_BLOCK_STATE_SCANNING,
|
||||
YAFFS_BLOCK_STATE_NEEDS_SCANNING,
|
||||
/* The block might have something on it (ie it is allocating or full, perhaps empty)
|
||||
* but it needs to be scanned to determine its true state.
|
||||
* This state is only valid during yaffs_Scan.
|
||||
* NB We tolerate empty because the pre-scanner might be incapable of deciding
|
||||
* However, if this state is returned on a YAFFS2 device, then we expect a sequence number
|
||||
*/
|
||||
|
||||
YAFFS_BLOCK_STATE_EMPTY,
|
||||
/* This block is empty */
|
||||
|
||||
YAFFS_BLOCK_STATE_ALLOCATING,
|
||||
/* This block is partially allocated.
|
||||
* At least one page holds valid data.
|
||||
* This is the one currently being used for page
|
||||
* allocation. Should never be more than one of these
|
||||
*/
|
||||
|
||||
YAFFS_BLOCK_STATE_FULL,
|
||||
/* All the pages in this block have been allocated.
|
||||
*/
|
||||
|
||||
YAFFS_BLOCK_STATE_DIRTY,
|
||||
/* All pages have been allocated and deleted.
|
||||
* Erase me, reuse me.
|
||||
*/
|
||||
|
||||
YAFFS_BLOCK_STATE_CHECKPOINT,
|
||||
/* This block is assigned to holding checkpoint data.
|
||||
*/
|
||||
|
||||
YAFFS_BLOCK_STATE_COLLECTING,
|
||||
/* This block is being garbage collected */
|
||||
|
||||
YAFFS_BLOCK_STATE_DEAD
|
||||
/* This block has failed and is not in use */
|
||||
} yaffs_BlockState;
|
||||
|
||||
#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1)
|
||||
|
||||
|
||||
typedef struct {
|
||||
|
||||
int softDeletions:10; /* number of soft deleted pages */
|
||||
int pagesInUse:10; /* number of pages in use */
|
||||
yaffs_BlockState blockState:4; /* One of the above block states */
|
||||
__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 */
|
||||
__u32 gcPrioritise: 1; /* An ECC check or blank check has failed on this block.
|
||||
It should be prioritised for GC */
|
||||
__u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */
|
||||
|
||||
#ifdef CONFIG_YAFFS_YAFFS2
|
||||
__u32 hasShrinkHeader:1; /* This block has at least one shrink object header */
|
||||
__u32 sequenceNumber; /* block sequence number for yaffs2 */
|
||||
#endif
|
||||
|
||||
} yaffs_BlockInfo;
|
||||
|
||||
/* -------------------------- Object structure -------------------------------*/
|
||||
/* This is the object structure as stored on NAND */
|
||||
|
||||
typedef struct {
|
||||
yaffs_ObjectType type;
|
||||
|
||||
/* Apply to everything */
|
||||
int parentObjectId;
|
||||
__u16 sum__NoLongerUsed; /* checksum of name. No longer used */
|
||||
YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
|
||||
|
||||
/* Thes following apply to directories, files, symlinks - not hard links */
|
||||
__u32 yst_mode; /* protection */
|
||||
|
||||
#ifdef CONFIG_YAFFS_WINCE
|
||||
__u32 notForWinCE[5];
|
||||
#else
|
||||
__u32 yst_uid;
|
||||
__u32 yst_gid;
|
||||
__u32 yst_atime;
|
||||
__u32 yst_mtime;
|
||||
__u32 yst_ctime;
|
||||
#endif
|
||||
|
||||
/* File size applies to files only */
|
||||
int fileSize;
|
||||
|
||||
/* Equivalent object id applies to hard links only. */
|
||||
int equivalentObjectId;
|
||||
|
||||
/* Alias is for symlinks only. */
|
||||
YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1];
|
||||
|
||||
__u32 yst_rdev; /* device stuff for block and char devices (major/min) */
|
||||
|
||||
#ifdef CONFIG_YAFFS_WINCE
|
||||
__u32 win_ctime[2];
|
||||
__u32 win_atime[2];
|
||||
__u32 win_mtime[2];
|
||||
__u32 roomToGrow[4];
|
||||
#else
|
||||
__u32 roomToGrow[10];
|
||||
#endif
|
||||
|
||||
int shadowsObject; /* This object header shadows the specified object if > 0 */
|
||||
|
||||
/* isShrink applies to object headers written when we shrink the file (ie resize) */
|
||||
__u32 isShrink;
|
||||
|
||||
} yaffs_ObjectHeader;
|
||||
|
||||
/*--------------------------- Tnode -------------------------- */
|
||||
|
||||
union yaffs_Tnode_union {
|
||||
#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
|
||||
union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1];
|
||||
#else
|
||||
union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
|
||||
#endif
|
||||
/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */
|
||||
|
||||
};
|
||||
|
||||
typedef union yaffs_Tnode_union yaffs_Tnode;
|
||||
|
||||
struct yaffs_TnodeList_struct {
|
||||
struct yaffs_TnodeList_struct *next;
|
||||
yaffs_Tnode *tnodes;
|
||||
};
|
||||
|
||||
typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
|
||||
|
||||
/*------------------------ Object -----------------------------*/
|
||||
/* An object can be one of:
|
||||
* - a directory (no data, has children links
|
||||
* - a regular file (data.... not prunes :->).
|
||||
* - a symlink [symbolic link] (the alias).
|
||||
* - a hard link
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
__u32 fileSize;
|
||||
__u32 scannedFileSize;
|
||||
__u32 shrinkSize;
|
||||
int topLevel;
|
||||
yaffs_Tnode *top;
|
||||
} yaffs_FileStructure;
|
||||
|
||||
typedef struct {
|
||||
struct list_head children; /* list of child links */
|
||||
} yaffs_DirectoryStructure;
|
||||
|
||||
typedef struct {
|
||||
YCHAR *alias;
|
||||
} yaffs_SymLinkStructure;
|
||||
|
||||
typedef struct {
|
||||
struct yaffs_ObjectStruct *equivalentObject;
|
||||
__u32 equivalentObjectId;
|
||||
} yaffs_HardLinkStructure;
|
||||
|
||||
typedef union {
|
||||
yaffs_FileStructure fileVariant;
|
||||
yaffs_DirectoryStructure directoryVariant;
|
||||
yaffs_SymLinkStructure symLinkVariant;
|
||||
yaffs_HardLinkStructure hardLinkVariant;
|
||||
} yaffs_ObjectVariant;
|
||||
|
||||
struct yaffs_ObjectStruct {
|
||||
__u8 deleted:1; /* This should only apply to unlinked files. */
|
||||
__u8 softDeleted:1; /* it has also been soft deleted */
|
||||
__u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/
|
||||
__u8 fake:1; /* A fake object has no presence on NAND. */
|
||||
__u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */
|
||||
__u8 unlinkAllowed:1;
|
||||
__u8 dirty:1; /* the object needs to be written to flash */
|
||||
__u8 valid:1; /* When the file system is being loaded up, this
|
||||
* object might be created before the data
|
||||
* is available (ie. file data records appear before the header).
|
||||
*/
|
||||
__u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */
|
||||
|
||||
__u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is
|
||||
* still in the inode cache. Free of object is defered.
|
||||
* until the inode is released.
|
||||
*/
|
||||
|
||||
__u8 serial; /* serial number of chunk in NAND. Cached here */
|
||||
__u16 sum; /* sum of the name to speed searching */
|
||||
|
||||
struct yaffs_DeviceStruct *myDev; /* The device I'm on */
|
||||
|
||||
struct list_head hashLink; /* list of objects in this hash bucket */
|
||||
|
||||
struct list_head hardLinks; /* all the equivalent hard linked objects */
|
||||
|
||||
/* directory structure stuff */
|
||||
/* also used for linking up the free list */
|
||||
struct yaffs_ObjectStruct *parent;
|
||||
struct list_head siblings;
|
||||
|
||||
/* Where's my object header in NAND? */
|
||||
int chunkId;
|
||||
|
||||
int nDataChunks; /* Number of data chunks attached to the file. */
|
||||
|
||||
__u32 objectId; /* the object id value */
|
||||
|
||||
__u32 yst_mode;
|
||||
|
||||
#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
|
||||
YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
|
||||
#endif
|
||||
|
||||
#ifndef __KERNEL__
|
||||
__u32 inUse;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_YAFFS_WINCE
|
||||
__u32 win_ctime[2];
|
||||
__u32 win_mtime[2];
|
||||
__u32 win_atime[2];
|
||||
#else
|
||||
__u32 yst_uid;
|
||||
__u32 yst_gid;
|
||||
__u32 yst_atime;
|
||||
__u32 yst_mtime;
|
||||
__u32 yst_ctime;
|
||||
#endif
|
||||
|
||||
__u32 yst_rdev;
|
||||
|
||||
#ifdef __KERNEL__
|
||||
struct inode *myInode;
|
||||
|
||||
#endif
|
||||
|
||||
yaffs_ObjectType variantType;
|
||||
|
||||
yaffs_ObjectVariant variant;
|
||||
|
||||
};
|
||||
|
||||
typedef struct yaffs_ObjectStruct yaffs_Object;
|
||||
|
||||
struct yaffs_ObjectList_struct {
|
||||
yaffs_Object *objects;
|
||||
struct yaffs_ObjectList_struct *next;
|
||||
};
|
||||
|
||||
typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
|
||||
|
||||
typedef struct {
|
||||
struct list_head list;
|
||||
int count;
|
||||
} yaffs_ObjectBucket;
|
||||
|
||||
|
||||
/* yaffs_CheckpointObject holds the definition of an object as dumped
|
||||
* by checkpointing.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
int structType;
|
||||
__u32 objectId;
|
||||
__u32 parentId;
|
||||
int chunkId;
|
||||
|
||||
yaffs_ObjectType variantType:3;
|
||||
__u8 deleted:1;
|
||||
__u8 softDeleted:1;
|
||||
__u8 unlinked:1;
|
||||
__u8 fake:1;
|
||||
__u8 renameAllowed:1;
|
||||
__u8 unlinkAllowed:1;
|
||||
__u8 serial;
|
||||
|
||||
int nDataChunks;
|
||||
__u32 fileSizeOrEquivalentObjectId;
|
||||
|
||||
}yaffs_CheckpointObject;
|
||||
|
||||
/*--------------------- Temporary buffers ----------------
|
||||
*
|
||||
* These are chunk-sized working buffers. Each device has a few
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
__u8 *buffer;
|
||||
int line; /* track from whence this buffer was allocated */
|
||||
int maxLine;
|
||||
} yaffs_TempBuffer;
|
||||
|
||||
/*----------------- Device ---------------------------------*/
|
||||
|
||||
struct yaffs_DeviceStruct {
|
||||
struct list_head devList;
|
||||
const char *name;
|
||||
|
||||
/* Entry parameters set up way early. Yaffs sets up the rest.*/
|
||||
int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
|
||||
int nChunksPerBlock; /* does not need to be a power of 2 */
|
||||
int nBytesPerSpare; /* spare area size */
|
||||
int startBlock; /* Start block we're allowed to use */
|
||||
int endBlock; /* End block we're allowed to use */
|
||||
int nReservedBlocks; /* We want this tuneable so that we can reduce */
|
||||
/* reserved blocks on NOR and RAM. */
|
||||
|
||||
|
||||
/* Stuff used by the shared space checkpointing mechanism */
|
||||
/* If this value is zero, then this mechanism is disabled */
|
||||
|
||||
int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */
|
||||
|
||||
|
||||
|
||||
|
||||
int nShortOpCaches; /* If <= 0, then short op caching is disabled, else
|
||||
* the number of short op caches (don't use too many)
|
||||
*/
|
||||
|
||||
int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
|
||||
|
||||
int useNANDECC; /* Flag to decide whether or not to use NANDECC */
|
||||
|
||||
void *genericDevice; /* Pointer to device context
|
||||
* On an mtd this holds the mtd pointer.
|
||||
*/
|
||||
void *superBlock;
|
||||
|
||||
/* NAND access functions (Must be set before calling YAFFS)*/
|
||||
|
||||
int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev,
|
||||
int chunkInNAND, const __u8 * data,
|
||||
const yaffs_Spare * spare);
|
||||
int (*readChunkFromNAND) (struct yaffs_DeviceStruct * dev,
|
||||
int chunkInNAND, __u8 * data,
|
||||
yaffs_Spare * spare);
|
||||
int (*eraseBlockInNAND) (struct yaffs_DeviceStruct * dev,
|
||||
int blockInNAND);
|
||||
int (*initialiseNAND) (struct yaffs_DeviceStruct * dev);
|
||||
|
||||
#ifdef CONFIG_YAFFS_YAFFS2
|
||||
int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct * dev,
|
||||
int chunkInNAND, const __u8 * data,
|
||||
const yaffs_ExtendedTags * tags);
|
||||
int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct * dev,
|
||||
int chunkInNAND, __u8 * data,
|
||||
yaffs_ExtendedTags * tags);
|
||||
int (*markNANDBlockBad) (struct yaffs_DeviceStruct * dev, int blockNo);
|
||||
int (*queryNANDBlock) (struct yaffs_DeviceStruct * dev, int blockNo,
|
||||
yaffs_BlockState * state, int *sequenceNumber);
|
||||
#endif
|
||||
|
||||
int isYaffs2;
|
||||
|
||||
/* The removeObjectCallback function must be supplied by OS flavours that
|
||||
* need it. The Linux kernel does not use this, but yaffs direct does use
|
||||
* it to implement the faster readdir
|
||||
*/
|
||||
void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
|
||||
|
||||
/* Callback to mark the superblock dirsty */
|
||||
void (*markSuperBlockDirty)(void * superblock);
|
||||
|
||||
int wideTnodesDisabled; /* Set to disable wide tnodes */
|
||||
|
||||
|
||||
/* End of stuff that must be set before initialisation. */
|
||||
|
||||
/* Checkpoint control. Can be set before or after initialisation */
|
||||
__u8 skipCheckpointRead;
|
||||
__u8 skipCheckpointWrite;
|
||||
|
||||
/* Runtime parameters. Set up by YAFFS. */
|
||||
|
||||
__u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
|
||||
__u16 chunkGroupSize; /* == 2^^chunkGroupBits */
|
||||
|
||||
/* Stuff to support wide tnodes */
|
||||
__u32 tnodeWidth;
|
||||
__u32 tnodeMask;
|
||||
|
||||
/* Stuff to support various file offses to chunk/offset translations */
|
||||
/* "Crumbs" for nDataBytesPerChunk not being a power of 2 */
|
||||
__u32 crumbMask;
|
||||
__u32 crumbShift;
|
||||
__u32 crumbsPerChunk;
|
||||
|
||||
/* Straight shifting for nDataBytesPerChunk being a power of 2 */
|
||||
__u32 chunkShift;
|
||||
__u32 chunkMask;
|
||||
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
struct semaphore sem; /* Semaphore for waiting on erasure.*/
|
||||
struct semaphore grossLock; /* Gross locking semaphore */
|
||||
__u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
|
||||
* at compile time so we have to allocate it.
|
||||
*/
|
||||
void (*putSuperFunc) (struct super_block * sb);
|
||||
#endif
|
||||
|
||||
int isMounted;
|
||||
|
||||
int isCheckpointed;
|
||||
|
||||
|
||||
/* Stuff to support block offsetting to support start block zero */
|
||||
int internalStartBlock;
|
||||
int internalEndBlock;
|
||||
int blockOffset;
|
||||
int chunkOffset;
|
||||
|
||||
|
||||
/* Runtime checkpointing stuff */
|
||||
int checkpointPageSequence; /* running sequence number of checkpoint pages */
|
||||
int checkpointByteCount;
|
||||
int checkpointByteOffset;
|
||||
__u8 *checkpointBuffer;
|
||||
int checkpointOpenForWrite;
|
||||
int blocksInCheckpoint;
|
||||
int checkpointCurrentChunk;
|
||||
int checkpointCurrentBlock;
|
||||
int checkpointNextBlock;
|
||||
int *checkpointBlockList;
|
||||
int checkpointMaxBlocks;
|
||||
__u32 checkpointSum;
|
||||
__u32 checkpointXor;
|
||||
|
||||
/* Block Info */
|
||||
yaffs_BlockInfo *blockInfo;
|
||||
__u8 *chunkBits; /* bitmap of chunks in use */
|
||||
unsigned blockInfoAlt:1; /* was allocated using alternative strategy */
|
||||
unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */
|
||||
int chunkBitmapStride; /* Number of bytes of chunkBits per block.
|
||||
* Must be consistent with nChunksPerBlock.
|
||||
*/
|
||||
|
||||
int nErasedBlocks;
|
||||
int allocationBlock; /* Current block being allocated off */
|
||||
__u32 allocationPage;
|
||||
int allocationBlockFinder; /* Used to search for next allocation block */
|
||||
|
||||
/* Runtime state */
|
||||
int nTnodesCreated;
|
||||
yaffs_Tnode *freeTnodes;
|
||||
int nFreeTnodes;
|
||||
yaffs_TnodeList *allocatedTnodeList;
|
||||
|
||||
int isDoingGC;
|
||||
|
||||
int nObjectsCreated;
|
||||
yaffs_Object *freeObjects;
|
||||
int nFreeObjects;
|
||||
|
||||
yaffs_ObjectList *allocatedObjectList;
|
||||
|
||||
yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
|
||||
|
||||
int nFreeChunks;
|
||||
|
||||
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;
|
||||
int nPageReads;
|
||||
int nBlockErasures;
|
||||
int nErasureFailures;
|
||||
int nGCCopies;
|
||||
int garbageCollections;
|
||||
int passiveGarbageCollections;
|
||||
int nRetriedWrites;
|
||||
int nRetiredBlocks;
|
||||
int eccFixed;
|
||||
int eccUnfixed;
|
||||
int tagsEccFixed;
|
||||
int tagsEccUnfixed;
|
||||
int nDeletions;
|
||||
int nUnmarkedDeletions;
|
||||
|
||||
int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
|
||||
|
||||
/* Special directories */
|
||||
yaffs_Object *rootDir;
|
||||
yaffs_Object *lostNFoundDir;
|
||||
|
||||
/* Buffer areas for storing data to recover from write failures TODO
|
||||
* __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK];
|
||||
* yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK];
|
||||
*/
|
||||
|
||||
int bufferedBlock; /* Which block is buffered here? */
|
||||
int doingBufferedBlockRewrite;
|
||||
|
||||
yaffs_ChunkCache *srCache;
|
||||
int srLastUse;
|
||||
|
||||
int cacheHits;
|
||||
|
||||
/* Stuff for background deletion and unlinked files.*/
|
||||
yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */
|
||||
yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */
|
||||
yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/
|
||||
int nDeletedFiles; /* Count of files awaiting deletion;*/
|
||||
int nUnlinkedFiles; /* Count of unlinked files. */
|
||||
int nBackgroundDeletions; /* Count of background deletions. */
|
||||
|
||||
|
||||
yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
|
||||
int maxTemp;
|
||||
int unmanagedTempAllocations;
|
||||
int unmanagedTempDeallocations;
|
||||
|
||||
/* yaffs2 runtime stuff */
|
||||
unsigned sequenceNumber; /* Sequence number of currently allocating block */
|
||||
unsigned oldestDirtySequence;
|
||||
|
||||
};
|
||||
|
||||
typedef struct yaffs_DeviceStruct yaffs_Device;
|
||||
|
||||
/* The static layout of bllock usage etc is stored in the super block header */
|
||||
typedef struct {
|
||||
int StructType;
|
||||
int version;
|
||||
int checkpointStartBlock;
|
||||
int checkpointEndBlock;
|
||||
int startBlock;
|
||||
int endBlock;
|
||||
int rfu[100];
|
||||
} yaffs_SuperBlockHeader;
|
||||
|
||||
/* The CheckpointDevice structure holds the device information that changes at runtime and
|
||||
* must be preserved over unmount/mount cycles.
|
||||
*/
|
||||
typedef struct {
|
||||
int structType;
|
||||
int nErasedBlocks;
|
||||
int allocationBlock; /* Current block being allocated off */
|
||||
__u32 allocationPage;
|
||||
int nFreeChunks;
|
||||
|
||||
int nDeletedFiles; /* Count of files awaiting deletion;*/
|
||||
int nUnlinkedFiles; /* Count of unlinked files. */
|
||||
int nBackgroundDeletions; /* Count of background deletions. */
|
||||
|
||||
/* yaffs2 runtime stuff */
|
||||
unsigned sequenceNumber; /* Sequence number of currently allocating block */
|
||||
unsigned oldestDirtySequence;
|
||||
|
||||
} yaffs_CheckpointDevice;
|
||||
|
||||
|
||||
typedef struct {
|
||||
int structType;
|
||||
__u32 magic;
|
||||
__u32 version;
|
||||
__u32 head;
|
||||
} yaffs_CheckpointValidity;
|
||||
|
||||
/* Function to manipulate block info */
|
||||
static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
|
||||
{
|
||||
if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),
|
||||
blk));
|
||||
YBUG();
|
||||
}
|
||||
return &dev->blockInfo[blk - dev->internalStartBlock];
|
||||
}
|
||||
|
||||
/*----------------------- YAFFS Functions -----------------------*/
|
||||
|
||||
int yaffs_GutsInitialise(yaffs_Device * dev);
|
||||
void yaffs_Deinitialise(yaffs_Device * dev);
|
||||
|
||||
int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev);
|
||||
|
||||
int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
|
||||
yaffs_Object * newDir, const YCHAR * newName);
|
||||
|
||||
int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name);
|
||||
int yaffs_DeleteFile(yaffs_Object * obj);
|
||||
|
||||
int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize);
|
||||
int yaffs_GetObjectFileLength(yaffs_Object * obj);
|
||||
int yaffs_GetObjectInode(yaffs_Object * obj);
|
||||
unsigned yaffs_GetObjectType(yaffs_Object * obj);
|
||||
int yaffs_GetObjectLinkCount(yaffs_Object * obj);
|
||||
|
||||
int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr);
|
||||
int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr);
|
||||
|
||||
/* File operations */
|
||||
int yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, loff_t offset,
|
||||
int nBytes);
|
||||
int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset,
|
||||
int nBytes, int writeThrough);
|
||||
int yaffs_ResizeFile(yaffs_Object * obj, loff_t newSize);
|
||||
|
||||
yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name,
|
||||
__u32 mode, __u32 uid, __u32 gid);
|
||||
int yaffs_FlushFile(yaffs_Object * obj, int updateTime);
|
||||
|
||||
/* Flushing and checkpointing */
|
||||
void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
|
||||
|
||||
int yaffs_CheckpointSave(yaffs_Device *dev);
|
||||
int yaffs_CheckpointRestore(yaffs_Device *dev);
|
||||
|
||||
/* Directory operations */
|
||||
yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name,
|
||||
__u32 mode, __u32 uid, __u32 gid);
|
||||
yaffs_Object *yaffs_FindObjectByName(yaffs_Object * theDir, const YCHAR * name);
|
||||
int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
|
||||
int (*fn) (yaffs_Object *));
|
||||
|
||||
yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number);
|
||||
|
||||
/* Link operations */
|
||||
yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
|
||||
yaffs_Object * equivalentObject);
|
||||
|
||||
yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj);
|
||||
|
||||
/* Symlink operations */
|
||||
yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
|
||||
__u32 mode, __u32 uid, __u32 gid,
|
||||
const YCHAR * alias);
|
||||
YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj);
|
||||
|
||||
/* Special inodes (fifos, sockets and devices) */
|
||||
yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
|
||||
__u32 mode, __u32 uid, __u32 gid, __u32 rdev);
|
||||
|
||||
/* Special directories */
|
||||
yaffs_Object *yaffs_Root(yaffs_Device * dev);
|
||||
yaffs_Object *yaffs_LostNFound(yaffs_Device * dev);
|
||||
|
||||
#ifdef CONFIG_YAFFS_WINCE
|
||||
/* CONFIG_YAFFS_WINCE special stuff */
|
||||
void yfsd_WinFileTimeNow(__u32 target[2]);
|
||||
#endif
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
void yaffs_HandleDeferedFree(yaffs_Object * obj);
|
||||
#endif
|
||||
|
||||
/* Debug dump */
|
||||
int yaffs_DumpObject(yaffs_Object * obj);
|
||||
|
||||
void yaffs_GutsTest(yaffs_Device * dev);
|
||||
|
||||
/* A few useful functions */
|
||||
void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
|
||||
void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn);
|
||||
int yaffs_CheckFF(__u8 * buffer, int nBytes);
|
||||
void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
|
||||
|
||||
#endif
|
||||
241
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif.c
Normal file
241
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif.c
Normal file
|
|
@ -0,0 +1,241 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
const char *yaffs_mtdif_c_version =
|
||||
"$Id$";
|
||||
|
||||
#include "yportenv.h"
|
||||
|
||||
|
||||
#include "yaffs_mtdif.h"
|
||||
|
||||
#include "linux/mtd/mtd.h"
|
||||
#include "linux/types.h"
|
||||
#include "linux/time.h"
|
||||
#include "linux/mtd/nand.h"
|
||||
|
||||
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
|
||||
static struct nand_oobinfo yaffs_oobinfo = {
|
||||
.useecc = 1,
|
||||
.eccbytes = 6,
|
||||
.eccpos = {8, 9, 10, 13, 14, 15}
|
||||
};
|
||||
|
||||
static struct nand_oobinfo yaffs_noeccinfo = {
|
||||
.useecc = 0,
|
||||
};
|
||||
#endif
|
||||
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
|
||||
{
|
||||
oob[0] = spare->tagByte0;
|
||||
oob[1] = spare->tagByte1;
|
||||
oob[2] = spare->tagByte2;
|
||||
oob[3] = spare->tagByte3;
|
||||
oob[4] = spare->tagByte4;
|
||||
oob[5] = spare->tagByte5 & 0x3f;
|
||||
oob[5] |= spare->blockStatus == 'Y' ? 0: 0x80;
|
||||
oob[5] |= spare->pageStatus == 0 ? 0: 0x40;
|
||||
oob[6] = spare->tagByte6;
|
||||
oob[7] = spare->tagByte7;
|
||||
}
|
||||
|
||||
static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob)
|
||||
{
|
||||
struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare;
|
||||
spare->tagByte0 = oob[0];
|
||||
spare->tagByte1 = oob[1];
|
||||
spare->tagByte2 = oob[2];
|
||||
spare->tagByte3 = oob[3];
|
||||
spare->tagByte4 = oob[4];
|
||||
spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
|
||||
spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y';
|
||||
spare->pageStatus = oob[5] & 0x40 ? 0xff : 0;
|
||||
spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
|
||||
spare->tagByte6 = oob[6];
|
||||
spare->tagByte7 = oob[7];
|
||||
spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
|
||||
|
||||
nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
|
||||
}
|
||||
#endif
|
||||
|
||||
int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
const __u8 * data, const yaffs_Spare * spare)
|
||||
{
|
||||
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
struct mtd_oob_ops ops;
|
||||
#endif
|
||||
size_t dummy;
|
||||
int retval = 0;
|
||||
|
||||
loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
__u8 spareAsBytes[8]; /* OOB */
|
||||
|
||||
if (data && !spare)
|
||||
retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data);
|
||||
else if (spare) {
|
||||
if (dev->useNANDECC) {
|
||||
translate_spare2oob(spare, spareAsBytes);
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.ooblen = 8; /* temp hack */
|
||||
} else {
|
||||
ops.mode = MTD_OOB_RAW;
|
||||
ops.ooblen = YAFFS_BYTES_PER_SPARE;
|
||||
}
|
||||
ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
|
||||
ops.datbuf = (u8 *)data;
|
||||
ops.ooboffs = 0;
|
||||
ops.oobbuf = spareAsBytes;
|
||||
retval = mtd->write_oob(mtd, addr, &ops);
|
||||
}
|
||||
#else
|
||||
__u8 *spareAsBytes = (__u8 *) spare;
|
||||
|
||||
if (data && spare) {
|
||||
if (dev->useNANDECC)
|
||||
retval =
|
||||
mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data, spareAsBytes,
|
||||
&yaffs_oobinfo);
|
||||
else
|
||||
retval =
|
||||
mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data, spareAsBytes,
|
||||
&yaffs_noeccinfo);
|
||||
} else {
|
||||
if (data)
|
||||
retval =
|
||||
mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
|
||||
data);
|
||||
if (spare)
|
||||
retval =
|
||||
mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
|
||||
&dummy, spareAsBytes);
|
||||
}
|
||||
#endif
|
||||
|
||||
if (retval == 0)
|
||||
return YAFFS_OK;
|
||||
else
|
||||
return YAFFS_FAIL;
|
||||
}
|
||||
|
||||
int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
|
||||
yaffs_Spare * spare)
|
||||
{
|
||||
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
struct mtd_oob_ops ops;
|
||||
#endif
|
||||
size_t dummy;
|
||||
int retval = 0;
|
||||
|
||||
loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
__u8 spareAsBytes[8]; /* OOB */
|
||||
|
||||
if (data && !spare)
|
||||
retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data);
|
||||
else if (spare) {
|
||||
if (dev->useNANDECC) {
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.ooblen = 8; /* temp hack */
|
||||
} else {
|
||||
ops.mode = MTD_OOB_RAW;
|
||||
ops.ooblen = YAFFS_BYTES_PER_SPARE;
|
||||
}
|
||||
ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
|
||||
ops.datbuf = data;
|
||||
ops.ooboffs = 0;
|
||||
ops.oobbuf = spareAsBytes;
|
||||
retval = mtd->read_oob(mtd, addr, &ops);
|
||||
if (dev->useNANDECC)
|
||||
translate_oob2spare(spare, spareAsBytes);
|
||||
}
|
||||
#else
|
||||
__u8 *spareAsBytes = (__u8 *) spare;
|
||||
|
||||
if (data && spare) {
|
||||
if (dev->useNANDECC) {
|
||||
/* Careful, this call adds 2 ints */
|
||||
/* to the end of the spare data. Calling function */
|
||||
/* should allocate enough memory for spare, */
|
||||
/* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */
|
||||
retval =
|
||||
mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data, spareAsBytes,
|
||||
&yaffs_oobinfo);
|
||||
} else {
|
||||
retval =
|
||||
mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data, spareAsBytes,
|
||||
&yaffs_noeccinfo);
|
||||
}
|
||||
} else {
|
||||
if (data)
|
||||
retval =
|
||||
mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
|
||||
data);
|
||||
if (spare)
|
||||
retval =
|
||||
mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
|
||||
&dummy, spareAsBytes);
|
||||
}
|
||||
#endif
|
||||
|
||||
if (retval == 0)
|
||||
return YAFFS_OK;
|
||||
else
|
||||
return YAFFS_FAIL;
|
||||
}
|
||||
|
||||
int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber)
|
||||
{
|
||||
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
||||
__u32 addr =
|
||||
((loff_t) blockNumber) * dev->nDataBytesPerChunk
|
||||
* dev->nChunksPerBlock;
|
||||
struct erase_info ei;
|
||||
int retval = 0;
|
||||
|
||||
ei.mtd = mtd;
|
||||
ei.addr = addr;
|
||||
ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
|
||||
ei.time = 1000;
|
||||
ei.retries = 2;
|
||||
ei.callback = NULL;
|
||||
ei.priv = (u_long) dev;
|
||||
|
||||
/* Todo finish off the ei if required */
|
||||
|
||||
sema_init(&dev->sem, 0);
|
||||
|
||||
retval = mtd->erase(mtd, &ei);
|
||||
|
||||
if (retval == 0)
|
||||
return YAFFS_OK;
|
||||
else
|
||||
return YAFFS_FAIL;
|
||||
}
|
||||
|
||||
int nandmtd_InitialiseNAND(yaffs_Device * dev)
|
||||
{
|
||||
return YAFFS_OK;
|
||||
}
|
||||
|
||||
27
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif.h
Normal file
27
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif.h
Normal file
|
|
@ -0,0 +1,27 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
#ifndef __YAFFS_MTDIF_H__
|
||||
#define __YAFFS_MTDIF_H__
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
|
||||
int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
const __u8 * data, const yaffs_Spare * spare);
|
||||
int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
|
||||
yaffs_Spare * spare);
|
||||
int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber);
|
||||
int nandmtd_InitialiseNAND(yaffs_Device * dev);
|
||||
#endif
|
||||
434
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif1-compat.c
Normal file
434
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif1-compat.c
Normal file
|
|
@ -0,0 +1,434 @@
|
|||
From ian@brightstareng.com Fri May 18 15:06:49 2007
|
||||
From ian@brightstareng.com Fri May 18 15:08:21 2007
|
||||
Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com)
|
||||
by apollo.linkchoose.co.uk with esmtp (Exim 4.60)
|
||||
(envelope-from <ian@brightstareng.com>)
|
||||
id 1Hp380-00011e-T6
|
||||
for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100
|
||||
Received: from localhost (localhost.localdomain [127.0.0.1])
|
||||
by zebra.brightstareng.com (Postfix) with ESMTP
|
||||
id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT)
|
||||
Received: from zebra.brightstareng.com ([127.0.0.1])
|
||||
by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP
|
||||
id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT)
|
||||
Received: from pippin (unknown [192.168.1.25])
|
||||
by zebra.brightstareng.com (Postfix) with ESMTP
|
||||
id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT)
|
||||
From: Ian McDonnell <ian@brightstareng.com>
|
||||
To: David Goodenough <david.goodenough@linkchoose.co.uk>
|
||||
Subject: Re: something tested this time -- yaffs_mtdif1-compat.c
|
||||
Date: Fri, 18 May 2007 10:06:49 -0400
|
||||
User-Agent: KMail/1.9.1
|
||||
References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk>
|
||||
In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk>
|
||||
Cc: Andrea Conti <alyf@alyf.net>,
|
||||
Charles Manning <manningc2@actrix.gen.nz>
|
||||
MIME-Version: 1.0
|
||||
Content-Type: Multipart/Mixed;
|
||||
boundary="Boundary-00=_5LbTGmt62YoutxM"
|
||||
Message-Id: <200705181006.49860.ian@brightstareng.com>
|
||||
X-Virus-Scanned: by amavisd-new at brightstareng.com
|
||||
Status: R
|
||||
X-Status: NT
|
||||
X-KMail-EncryptionState:
|
||||
X-KMail-SignatureState:
|
||||
X-KMail-MDN-Sent:
|
||||
|
||||
--Boundary-00=_5LbTGmt62YoutxM
|
||||
Content-Type: text/plain;
|
||||
charset="iso-8859-15"
|
||||
Content-Transfer-Encoding: 7bit
|
||||
Content-Disposition: inline
|
||||
|
||||
David, Andrea,
|
||||
|
||||
On Friday 18 May 2007 08:34, you wrote:
|
||||
> Yea team. With this fix in place (I put it in the wrong place
|
||||
> at first) I can now mount and ls the Yaffs partition without
|
||||
> an error messages!
|
||||
|
||||
Good news!
|
||||
|
||||
Attached is a newer yaffs_mtdif1.c with a bandaid to help the
|
||||
2.6.18 and 2.6.19 versions of MTD not trip on the oob read.
|
||||
See the LINUX_VERSION_CODE conditional in
|
||||
nandmtd1_ReadChunkWithTagsFromNAND.
|
||||
|
||||
-imcd
|
||||
|
||||
--Boundary-00=_5LbTGmt62YoutxM
|
||||
Content-Type: text/x-csrc;
|
||||
charset="iso-8859-15";
|
||||
name="yaffs_mtdif1.c"
|
||||
Content-Transfer-Encoding: 7bit
|
||||
Content-Disposition: attachment;
|
||||
filename="yaffs_mtdif1.c"
|
||||
|
||||
/*
|
||||
* 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$";
|
||||
|
||||
#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*/
|
||||
|
||||
--Boundary-00=_5LbTGmt62YoutxM--
|
||||
|
||||
|
||||
|
||||
363
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif1.c
Normal file
363
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif1.c
Normal file
|
|
@ -0,0 +1,363 @@
|
|||
/*
|
||||
* 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$";
|
||||
|
||||
#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);
|
||||
|
||||
dev->nPageWrites++;
|
||||
|
||||
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;
|
||||
|
||||
dev->nPageReads++;
|
||||
|
||||
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
|
||||
deleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
|
||||
#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++;
|
||||
if (eccres == YAFFS_ECC_RESULT_NO_ERROR)
|
||||
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 */
|
||||
etags->chunkDeleted = deleted;
|
||||
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\n",
|
||||
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*/
|
||||
28
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif1.h
Normal file
28
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif1.h
Normal file
|
|
@ -0,0 +1,28 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 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 Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
#ifndef __YAFFS_MTDIF1_H__
|
||||
#define __YAFFS_MTDIF1_H__
|
||||
|
||||
int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
const __u8 * data, const yaffs_ExtendedTags * tags);
|
||||
|
||||
int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
__u8 * data, yaffs_ExtendedTags * tags);
|
||||
|
||||
int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
|
||||
|
||||
int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
||||
yaffs_BlockState * state, int *sequenceNumber);
|
||||
|
||||
#endif
|
||||
232
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif2.c
Normal file
232
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif2.c
Normal file
|
|
@ -0,0 +1,232 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/* mtd interface for YAFFS2 */
|
||||
|
||||
const char *yaffs_mtdif2_c_version =
|
||||
"$Id$";
|
||||
|
||||
#include "yportenv.h"
|
||||
|
||||
|
||||
#include "yaffs_mtdif2.h"
|
||||
|
||||
#include "linux/mtd/mtd.h"
|
||||
#include "linux/types.h"
|
||||
#include "linux/time.h"
|
||||
|
||||
#include "yaffs_packedtags2.h"
|
||||
|
||||
int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
const __u8 * data,
|
||||
const yaffs_ExtendedTags * tags)
|
||||
{
|
||||
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
struct mtd_oob_ops ops;
|
||||
#else
|
||||
size_t dummy;
|
||||
#endif
|
||||
int retval = 0;
|
||||
|
||||
loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
|
||||
|
||||
yaffs_PackedTags2 pt;
|
||||
|
||||
T(YAFFS_TRACE_MTD,
|
||||
(TSTR
|
||||
("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
|
||||
TENDSTR), chunkInNAND, data, tags));
|
||||
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
if (tags)
|
||||
yaffs_PackTags2(&pt, tags);
|
||||
else
|
||||
BUG(); /* both tags and data should always be present */
|
||||
|
||||
if (data) {
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.ooblen = sizeof(pt);
|
||||
ops.len = dev->nDataBytesPerChunk;
|
||||
ops.ooboffs = 0;
|
||||
ops.datbuf = (__u8 *)data;
|
||||
ops.oobbuf = (void *)&pt;
|
||||
retval = mtd->write_oob(mtd, addr, &ops);
|
||||
} else
|
||||
BUG(); /* both tags and data should always be present */
|
||||
#else
|
||||
if (tags) {
|
||||
yaffs_PackTags2(&pt, tags);
|
||||
}
|
||||
|
||||
if (data && tags) {
|
||||
if (dev->useNANDECC)
|
||||
retval =
|
||||
mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data, (__u8 *) & pt, NULL);
|
||||
else
|
||||
retval =
|
||||
mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data, (__u8 *) & pt, NULL);
|
||||
} else {
|
||||
if (data)
|
||||
retval =
|
||||
mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
|
||||
data);
|
||||
if (tags)
|
||||
retval =
|
||||
mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
|
||||
(__u8 *) & pt);
|
||||
|
||||
}
|
||||
#endif
|
||||
|
||||
if (retval == 0)
|
||||
return YAFFS_OK;
|
||||
else
|
||||
return YAFFS_FAIL;
|
||||
}
|
||||
|
||||
int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
__u8 * data, yaffs_ExtendedTags * tags)
|
||||
{
|
||||
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
struct mtd_oob_ops ops;
|
||||
#endif
|
||||
size_t dummy;
|
||||
int retval = 0;
|
||||
|
||||
loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
|
||||
|
||||
yaffs_PackedTags2 pt;
|
||||
|
||||
T(YAFFS_TRACE_MTD,
|
||||
(TSTR
|
||||
("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
|
||||
TENDSTR), chunkInNAND, data, tags));
|
||||
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
|
||||
if (data && !tags)
|
||||
retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data);
|
||||
else if (tags) {
|
||||
ops.mode = MTD_OOB_AUTO;
|
||||
ops.ooblen = sizeof(pt);
|
||||
ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
|
||||
ops.ooboffs = 0;
|
||||
ops.datbuf = data;
|
||||
ops.oobbuf = dev->spareBuffer;
|
||||
retval = mtd->read_oob(mtd, addr, &ops);
|
||||
}
|
||||
#else
|
||||
if (data && tags) {
|
||||
if (dev->useNANDECC) {
|
||||
retval =
|
||||
mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data, dev->spareBuffer,
|
||||
NULL);
|
||||
} else {
|
||||
retval =
|
||||
mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
|
||||
&dummy, data, dev->spareBuffer,
|
||||
NULL);
|
||||
}
|
||||
} else {
|
||||
if (data)
|
||||
retval =
|
||||
mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
|
||||
data);
|
||||
if (tags)
|
||||
retval =
|
||||
mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
|
||||
dev->spareBuffer);
|
||||
}
|
||||
#endif
|
||||
|
||||
memcpy(&pt, dev->spareBuffer, sizeof(pt));
|
||||
|
||||
if (tags)
|
||||
yaffs_UnpackTags2(tags, &pt);
|
||||
|
||||
if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
|
||||
tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
|
||||
|
||||
if (retval == 0)
|
||||
return YAFFS_OK;
|
||||
else
|
||||
return YAFFS_FAIL;
|
||||
}
|
||||
|
||||
int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
|
||||
{
|
||||
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
||||
int retval;
|
||||
T(YAFFS_TRACE_MTD,
|
||||
(TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
|
||||
|
||||
retval =
|
||||
mtd->block_markbad(mtd,
|
||||
blockNo * dev->nChunksPerBlock *
|
||||
dev->nDataBytesPerChunk);
|
||||
|
||||
if (retval == 0)
|
||||
return YAFFS_OK;
|
||||
else
|
||||
return YAFFS_FAIL;
|
||||
|
||||
}
|
||||
|
||||
int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
||||
yaffs_BlockState * state, int *sequenceNumber)
|
||||
{
|
||||
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
|
||||
int retval;
|
||||
|
||||
T(YAFFS_TRACE_MTD,
|
||||
(TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
|
||||
retval =
|
||||
mtd->block_isbad(mtd,
|
||||
blockNo * dev->nChunksPerBlock *
|
||||
dev->nDataBytesPerChunk);
|
||||
|
||||
if (retval) {
|
||||
T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
|
||||
|
||||
*state = YAFFS_BLOCK_STATE_DEAD;
|
||||
*sequenceNumber = 0;
|
||||
} else {
|
||||
yaffs_ExtendedTags t;
|
||||
nandmtd2_ReadChunkWithTagsFromNAND(dev,
|
||||
blockNo *
|
||||
dev->nChunksPerBlock, NULL,
|
||||
&t);
|
||||
|
||||
if (t.chunkUsed) {
|
||||
*sequenceNumber = t.sequenceNumber;
|
||||
*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
|
||||
} else {
|
||||
*sequenceNumber = 0;
|
||||
*state = YAFFS_BLOCK_STATE_EMPTY;
|
||||
}
|
||||
}
|
||||
T(YAFFS_TRACE_MTD,
|
||||
(TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
|
||||
*state));
|
||||
|
||||
if (retval == 0)
|
||||
return YAFFS_OK;
|
||||
else
|
||||
return YAFFS_FAIL;
|
||||
}
|
||||
|
||||
29
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif2.h
Normal file
29
target/linux/generic-2.6/files/fs/yaffs2/yaffs_mtdif2.h
Normal file
|
|
@ -0,0 +1,29 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
#ifndef __YAFFS_MTDIF2_H__
|
||||
#define __YAFFS_MTDIF2_H__
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
const __u8 * data,
|
||||
const yaffs_ExtendedTags * tags);
|
||||
int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
__u8 * data, yaffs_ExtendedTags * tags);
|
||||
int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
|
||||
int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
||||
yaffs_BlockState * state, int *sequenceNumber);
|
||||
|
||||
#endif
|
||||
134
target/linux/generic-2.6/files/fs/yaffs2/yaffs_nand.c
Normal file
134
target/linux/generic-2.6/files/fs/yaffs2/yaffs_nand.c
Normal file
|
|
@ -0,0 +1,134 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
const char *yaffs_nand_c_version =
|
||||
"$Id$";
|
||||
|
||||
#include "yaffs_nand.h"
|
||||
#include "yaffs_tagscompat.h"
|
||||
#include "yaffs_tagsvalidity.h"
|
||||
|
||||
|
||||
int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
__u8 * buffer,
|
||||
yaffs_ExtendedTags * tags)
|
||||
{
|
||||
int result;
|
||||
yaffs_ExtendedTags localTags;
|
||||
|
||||
int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
|
||||
|
||||
/* If there are no tags provided, use local tags to get prioritised gc working */
|
||||
if(!tags)
|
||||
tags = &localTags;
|
||||
|
||||
if (dev->readChunkWithTagsFromNAND)
|
||||
result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
|
||||
tags);
|
||||
else
|
||||
result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
|
||||
realignedChunkInNAND,
|
||||
buffer,
|
||||
tags);
|
||||
if(tags &&
|
||||
tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
|
||||
|
||||
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
|
||||
yaffs_HandleChunkError(dev,bi);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
|
||||
int chunkInNAND,
|
||||
const __u8 * buffer,
|
||||
yaffs_ExtendedTags * tags)
|
||||
{
|
||||
chunkInNAND -= dev->chunkOffset;
|
||||
|
||||
|
||||
if (tags) {
|
||||
tags->sequenceNumber = dev->sequenceNumber;
|
||||
tags->chunkUsed = 1;
|
||||
if (!yaffs_ValidateTags(tags)) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR("Writing uninitialised tags" TENDSTR)));
|
||||
YBUG();
|
||||
}
|
||||
T(YAFFS_TRACE_WRITE,
|
||||
(TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
|
||||
tags->objectId, tags->chunkId));
|
||||
} else {
|
||||
T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
|
||||
YBUG();
|
||||
}
|
||||
|
||||
if (dev->writeChunkWithTagsToNAND)
|
||||
return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
|
||||
tags);
|
||||
else
|
||||
return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
|
||||
chunkInNAND,
|
||||
buffer,
|
||||
tags);
|
||||
}
|
||||
|
||||
int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
|
||||
{
|
||||
blockNo -= dev->blockOffset;
|
||||
|
||||
;
|
||||
if (dev->markNANDBlockBad)
|
||||
return dev->markNANDBlockBad(dev, blockNo);
|
||||
else
|
||||
return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
|
||||
}
|
||||
|
||||
int yaffs_QueryInitialBlockState(yaffs_Device * dev,
|
||||
int blockNo,
|
||||
yaffs_BlockState * state,
|
||||
unsigned *sequenceNumber)
|
||||
{
|
||||
blockNo -= dev->blockOffset;
|
||||
|
||||
if (dev->queryNANDBlock)
|
||||
return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
|
||||
else
|
||||
return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
|
||||
state,
|
||||
sequenceNumber);
|
||||
}
|
||||
|
||||
|
||||
int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
|
||||
int blockInNAND)
|
||||
{
|
||||
int result;
|
||||
|
||||
blockInNAND -= dev->blockOffset;
|
||||
|
||||
|
||||
dev->nBlockErasures++;
|
||||
result = dev->eraseBlockInNAND(dev, blockInNAND);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
|
||||
{
|
||||
return dev->initialiseNAND(dev);
|
||||
}
|
||||
|
||||
|
||||
|
||||
44
target/linux/generic-2.6/files/fs/yaffs2/yaffs_nand.h
Normal file
44
target/linux/generic-2.6/files/fs/yaffs2/yaffs_nand.h
Normal file
|
|
@ -0,0 +1,44 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
#ifndef __YAFFS_NAND_H__
|
||||
#define __YAFFS_NAND_H__
|
||||
#include "yaffs_guts.h"
|
||||
|
||||
|
||||
|
||||
int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
|
||||
__u8 * buffer,
|
||||
yaffs_ExtendedTags * tags);
|
||||
|
||||
int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
|
||||
int chunkInNAND,
|
||||
const __u8 * buffer,
|
||||
yaffs_ExtendedTags * tags);
|
||||
|
||||
int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo);
|
||||
|
||||
int yaffs_QueryInitialBlockState(yaffs_Device * dev,
|
||||
int blockNo,
|
||||
yaffs_BlockState * state,
|
||||
unsigned *sequenceNumber);
|
||||
|
||||
int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
|
||||
int blockInNAND);
|
||||
|
||||
int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev);
|
||||
|
||||
#endif
|
||||
|
||||
39
target/linux/generic-2.6/files/fs/yaffs2/yaffs_nandemul2k.h
Normal file
39
target/linux/generic-2.6/files/fs/yaffs2/yaffs_nandemul2k.h
Normal file
|
|
@ -0,0 +1,39 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
/* Interface to emulated NAND functions (2k page size) */
|
||||
|
||||
#ifndef __YAFFS_NANDEMUL2K_H__
|
||||
#define __YAFFS_NANDEMUL2K_H__
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
|
||||
int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
|
||||
int chunkInNAND, const __u8 * data,
|
||||
yaffs_ExtendedTags * tags);
|
||||
int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev,
|
||||
int chunkInNAND, __u8 * data,
|
||||
yaffs_ExtendedTags * tags);
|
||||
int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo);
|
||||
int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
||||
yaffs_BlockState * state, int *sequenceNumber);
|
||||
int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
|
||||
int blockInNAND);
|
||||
int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev);
|
||||
int nandemul2k_GetBytesPerChunk(void);
|
||||
int nandemul2k_GetChunksPerBlock(void);
|
||||
int nandemul2k_GetNumberOfBlocks(void);
|
||||
|
||||
#endif
|
||||
52
target/linux/generic-2.6/files/fs/yaffs2/yaffs_packedtags1.c
Normal file
52
target/linux/generic-2.6/files/fs/yaffs2/yaffs_packedtags1.c
Normal file
|
|
@ -0,0 +1,52 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include "yaffs_packedtags1.h"
|
||||
#include "yportenv.h"
|
||||
|
||||
void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t)
|
||||
{
|
||||
pt->chunkId = t->chunkId;
|
||||
pt->serialNumber = t->serialNumber;
|
||||
pt->byteCount = t->byteCount;
|
||||
pt->objectId = t->objectId;
|
||||
pt->ecc = 0;
|
||||
pt->deleted = (t->chunkDeleted) ? 0 : 1;
|
||||
pt->unusedStuff = 0;
|
||||
pt->shouldBeFF = 0xFFFFFFFF;
|
||||
|
||||
}
|
||||
|
||||
void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt)
|
||||
{
|
||||
static const __u8 allFF[] =
|
||||
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
|
||||
0xff };
|
||||
|
||||
if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) {
|
||||
t->blockBad = 0;
|
||||
if (pt->shouldBeFF != 0xFFFFFFFF) {
|
||||
t->blockBad = 1;
|
||||
}
|
||||
t->chunkUsed = 1;
|
||||
t->objectId = pt->objectId;
|
||||
t->chunkId = pt->chunkId;
|
||||
t->byteCount = pt->byteCount;
|
||||
t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
||||
t->chunkDeleted = (pt->deleted) ? 0 : 1;
|
||||
t->serialNumber = pt->serialNumber;
|
||||
} else {
|
||||
memset(t, 0, sizeof(yaffs_ExtendedTags));
|
||||
|
||||
}
|
||||
}
|
||||
37
target/linux/generic-2.6/files/fs/yaffs2/yaffs_packedtags1.h
Normal file
37
target/linux/generic-2.6/files/fs/yaffs2/yaffs_packedtags1.h
Normal file
|
|
@ -0,0 +1,37 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
|
||||
|
||||
#ifndef __YAFFS_PACKEDTAGS1_H__
|
||||
#define __YAFFS_PACKEDTAGS1_H__
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
|
||||
typedef struct {
|
||||
unsigned chunkId:20;
|
||||
unsigned serialNumber:2;
|
||||
unsigned byteCount:10;
|
||||
unsigned objectId:18;
|
||||
unsigned ecc:12;
|
||||
unsigned deleted:1;
|
||||
unsigned unusedStuff:1;
|
||||
unsigned shouldBeFF;
|
||||
|
||||
} yaffs_PackedTags1;
|
||||
|
||||
void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t);
|
||||
void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt);
|
||||
#endif
|
||||
182
target/linux/generic-2.6/files/fs/yaffs2/yaffs_packedtags2.c
Normal file
182
target/linux/generic-2.6/files/fs/yaffs2/yaffs_packedtags2.c
Normal file
|
|
@ -0,0 +1,182 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include "yaffs_packedtags2.h"
|
||||
#include "yportenv.h"
|
||||
#include "yaffs_tagsvalidity.h"
|
||||
|
||||
/* This code packs a set of extended tags into a binary structure for
|
||||
* NAND storage
|
||||
*/
|
||||
|
||||
/* Some of the information is "extra" struff which can be packed in to
|
||||
* speed scanning
|
||||
* This is defined by having the EXTRA_HEADER_INFO_FLAG set.
|
||||
*/
|
||||
|
||||
/* Extra flags applied to chunkId */
|
||||
|
||||
#define EXTRA_HEADER_INFO_FLAG 0x80000000
|
||||
#define EXTRA_SHRINK_FLAG 0x40000000
|
||||
#define EXTRA_SHADOWS_FLAG 0x20000000
|
||||
#define EXTRA_SPARE_FLAGS 0x10000000
|
||||
|
||||
#define ALL_EXTRA_FLAGS 0xF0000000
|
||||
|
||||
/* Also, the top 4 bits of the object Id are set to the object type. */
|
||||
#define EXTRA_OBJECT_TYPE_SHIFT (28)
|
||||
#define EXTRA_OBJECT_TYPE_MASK ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT)
|
||||
|
||||
static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 * pt)
|
||||
{
|
||||
T(YAFFS_TRACE_MTD,
|
||||
(TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR),
|
||||
pt->t.objectId, pt->t.chunkId, pt->t.byteCount,
|
||||
pt->t.sequenceNumber));
|
||||
}
|
||||
|
||||
static void yaffs_DumpTags2(const yaffs_ExtendedTags * t)
|
||||
{
|
||||
T(YAFFS_TRACE_MTD,
|
||||
(TSTR
|
||||
("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte "
|
||||
"%d del %d ser %d seq %d"
|
||||
TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId,
|
||||
t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber,
|
||||
t->sequenceNumber));
|
||||
|
||||
}
|
||||
|
||||
void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t)
|
||||
{
|
||||
pt->t.chunkId = t->chunkId;
|
||||
pt->t.sequenceNumber = t->sequenceNumber;
|
||||
pt->t.byteCount = t->byteCount;
|
||||
pt->t.objectId = t->objectId;
|
||||
|
||||
if (t->chunkId == 0 && t->extraHeaderInfoAvailable) {
|
||||
/* Store the extra header info instead */
|
||||
/* We save the parent object in the chunkId */
|
||||
pt->t.chunkId = EXTRA_HEADER_INFO_FLAG
|
||||
| t->extraParentObjectId;
|
||||
if (t->extraIsShrinkHeader) {
|
||||
pt->t.chunkId |= EXTRA_SHRINK_FLAG;
|
||||
}
|
||||
if (t->extraShadows) {
|
||||
pt->t.chunkId |= EXTRA_SHADOWS_FLAG;
|
||||
}
|
||||
|
||||
pt->t.objectId &= ~EXTRA_OBJECT_TYPE_MASK;
|
||||
pt->t.objectId |=
|
||||
(t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
|
||||
|
||||
if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
||||
pt->t.byteCount = t->extraEquivalentObjectId;
|
||||
} else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE) {
|
||||
pt->t.byteCount = t->extraFileLength;
|
||||
} else {
|
||||
pt->t.byteCount = 0;
|
||||
}
|
||||
}
|
||||
|
||||
yaffs_DumpPackedTags2(pt);
|
||||
yaffs_DumpTags2(t);
|
||||
|
||||
#ifndef YAFFS_IGNORE_TAGS_ECC
|
||||
{
|
||||
yaffs_ECCCalculateOther((unsigned char *)&pt->t,
|
||||
sizeof(yaffs_PackedTags2TagsPart),
|
||||
&pt->ecc);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt)
|
||||
{
|
||||
|
||||
memset(t, 0, sizeof(yaffs_ExtendedTags));
|
||||
|
||||
yaffs_InitialiseTags(t);
|
||||
|
||||
if (pt->t.sequenceNumber != 0xFFFFFFFF) {
|
||||
/* Page is in use */
|
||||
#ifdef YAFFS_IGNORE_TAGS_ECC
|
||||
{
|
||||
t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
||||
}
|
||||
#else
|
||||
{
|
||||
yaffs_ECCOther ecc;
|
||||
int result;
|
||||
yaffs_ECCCalculateOther((unsigned char *)&pt->t,
|
||||
sizeof
|
||||
(yaffs_PackedTags2TagsPart),
|
||||
&ecc);
|
||||
result =
|
||||
yaffs_ECCCorrectOther((unsigned char *)&pt->t,
|
||||
sizeof
|
||||
(yaffs_PackedTags2TagsPart),
|
||||
&pt->ecc, &ecc);
|
||||
switch(result){
|
||||
case 0:
|
||||
t->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
||||
break;
|
||||
case 1:
|
||||
t->eccResult = YAFFS_ECC_RESULT_FIXED;
|
||||
break;
|
||||
case -1:
|
||||
t->eccResult = YAFFS_ECC_RESULT_UNFIXED;
|
||||
break;
|
||||
default:
|
||||
t->eccResult = YAFFS_ECC_RESULT_UNKNOWN;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
t->blockBad = 0;
|
||||
t->chunkUsed = 1;
|
||||
t->objectId = pt->t.objectId;
|
||||
t->chunkId = pt->t.chunkId;
|
||||
t->byteCount = pt->t.byteCount;
|
||||
t->chunkDeleted = 0;
|
||||
t->serialNumber = 0;
|
||||
t->sequenceNumber = pt->t.sequenceNumber;
|
||||
|
||||
/* Do extra header info stuff */
|
||||
|
||||
if (pt->t.chunkId & EXTRA_HEADER_INFO_FLAG) {
|
||||
t->chunkId = 0;
|
||||
t->byteCount = 0;
|
||||
|
||||
t->extraHeaderInfoAvailable = 1;
|
||||
t->extraParentObjectId =
|
||||
pt->t.chunkId & (~(ALL_EXTRA_FLAGS));
|
||||
t->extraIsShrinkHeader =
|
||||
(pt->t.chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
|
||||
t->extraShadows =
|
||||
(pt->t.chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
|
||||
t->extraObjectType =
|
||||
pt->t.objectId >> EXTRA_OBJECT_TYPE_SHIFT;
|
||||
t->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
|
||||
|
||||
if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
||||
t->extraEquivalentObjectId = pt->t.byteCount;
|
||||
} else {
|
||||
t->extraFileLength = pt->t.byteCount;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
yaffs_DumpPackedTags2(pt);
|
||||
yaffs_DumpTags2(t);
|
||||
|
||||
}
|
||||
38
target/linux/generic-2.6/files/fs/yaffs2/yaffs_packedtags2.h
Normal file
38
target/linux/generic-2.6/files/fs/yaffs2/yaffs_packedtags2.h
Normal file
|
|
@ -0,0 +1,38 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
|
||||
|
||||
#ifndef __YAFFS_PACKEDTAGS2_H__
|
||||
#define __YAFFS_PACKEDTAGS2_H__
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
#include "yaffs_ecc.h"
|
||||
|
||||
typedef struct {
|
||||
unsigned sequenceNumber;
|
||||
unsigned objectId;
|
||||
unsigned chunkId;
|
||||
unsigned byteCount;
|
||||
} yaffs_PackedTags2TagsPart;
|
||||
|
||||
typedef struct {
|
||||
yaffs_PackedTags2TagsPart t;
|
||||
yaffs_ECCOther ecc;
|
||||
} yaffs_PackedTags2;
|
||||
|
||||
void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t);
|
||||
void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt);
|
||||
#endif
|
||||
160
target/linux/generic-2.6/files/fs/yaffs2/yaffs_qsort.c
Normal file
160
target/linux/generic-2.6/files/fs/yaffs2/yaffs_qsort.c
Normal file
|
|
@ -0,0 +1,160 @@
|
|||
/*
|
||||
* Copyright (c) 1992, 1993
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include "yportenv.h"
|
||||
//#include <linux/string.h>
|
||||
|
||||
/*
|
||||
* Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
|
||||
*/
|
||||
#define swapcode(TYPE, parmi, parmj, n) { \
|
||||
long i = (n) / sizeof (TYPE); \
|
||||
register TYPE *pi = (TYPE *) (parmi); \
|
||||
register TYPE *pj = (TYPE *) (parmj); \
|
||||
do { \
|
||||
register TYPE t = *pi; \
|
||||
*pi++ = *pj; \
|
||||
*pj++ = t; \
|
||||
} while (--i > 0); \
|
||||
}
|
||||
|
||||
#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
|
||||
es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1;
|
||||
|
||||
static __inline void
|
||||
swapfunc(char *a, char *b, int n, int swaptype)
|
||||
{
|
||||
if (swaptype <= 1)
|
||||
swapcode(long, a, b, n)
|
||||
else
|
||||
swapcode(char, a, b, n)
|
||||
}
|
||||
|
||||
#define swap(a, b) \
|
||||
if (swaptype == 0) { \
|
||||
long t = *(long *)(a); \
|
||||
*(long *)(a) = *(long *)(b); \
|
||||
*(long *)(b) = t; \
|
||||
} else \
|
||||
swapfunc(a, b, es, swaptype)
|
||||
|
||||
#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype)
|
||||
|
||||
static __inline char *
|
||||
med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *))
|
||||
{
|
||||
return cmp(a, b) < 0 ?
|
||||
(cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a ))
|
||||
:(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
|
||||
}
|
||||
|
||||
#ifndef min
|
||||
#define min(a,b) (((a) < (b)) ? (a) : (b))
|
||||
#endif
|
||||
|
||||
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;
|
||||
register char *a = aa;
|
||||
|
||||
loop: SWAPINIT(a, es);
|
||||
swap_cnt = 0;
|
||||
if (n < 7) {
|
||||
for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es)
|
||||
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
|
||||
pl -= es)
|
||||
swap(pl, pl - es);
|
||||
return;
|
||||
}
|
||||
pm = (char *)a + (n / 2) * es;
|
||||
if (n > 7) {
|
||||
pl = (char *)a;
|
||||
pn = (char *)a + (n - 1) * es;
|
||||
if (n > 40) {
|
||||
d = (n / 8) * es;
|
||||
pl = med3(pl, pl + d, pl + 2 * d, cmp);
|
||||
pm = med3(pm - d, pm, pm + d, cmp);
|
||||
pn = med3(pn - 2 * d, pn - d, pn, cmp);
|
||||
}
|
||||
pm = med3(pl, pm, pn, cmp);
|
||||
}
|
||||
swap(a, pm);
|
||||
pa = pb = (char *)a + es;
|
||||
|
||||
pc = pd = (char *)a + (n - 1) * es;
|
||||
for (;;) {
|
||||
while (pb <= pc && (r = cmp(pb, a)) <= 0) {
|
||||
if (r == 0) {
|
||||
swap_cnt = 1;
|
||||
swap(pa, pb);
|
||||
pa += es;
|
||||
}
|
||||
pb += es;
|
||||
}
|
||||
while (pb <= pc && (r = cmp(pc, a)) >= 0) {
|
||||
if (r == 0) {
|
||||
swap_cnt = 1;
|
||||
swap(pc, pd);
|
||||
pd -= es;
|
||||
}
|
||||
pc -= es;
|
||||
}
|
||||
if (pb > pc)
|
||||
break;
|
||||
swap(pb, pc);
|
||||
swap_cnt = 1;
|
||||
pb += es;
|
||||
pc -= es;
|
||||
}
|
||||
if (swap_cnt == 0) { /* Switch to insertion sort */
|
||||
for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
|
||||
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
|
||||
pl -= es)
|
||||
swap(pl, pl - es);
|
||||
return;
|
||||
}
|
||||
|
||||
pn = (char *)a + n * es;
|
||||
r = min(pa - (char *)a, pb - pa);
|
||||
vecswap(a, pb - r, r);
|
||||
r = min((long)(pd - pc), (long)(pn - pd - es));
|
||||
vecswap(pb, pn - r, r);
|
||||
if ((r = pb - pa) > es)
|
||||
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;
|
||||
}
|
||||
/* yaffs_qsort(pn - r, r / es, es, cmp);*/
|
||||
}
|
||||
23
target/linux/generic-2.6/files/fs/yaffs2/yaffs_qsort.h
Normal file
23
target/linux/generic-2.6/files/fs/yaffs2/yaffs_qsort.h
Normal file
|
|
@ -0,0 +1,23 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
|
||||
#ifndef __YAFFS_QSORT_H__
|
||||
#define __YAFFS_QSORT_H__
|
||||
|
||||
extern void yaffs_qsort (void *const base, size_t total_elems, size_t size,
|
||||
int (*cmp)(const void *, const void *));
|
||||
|
||||
#endif
|
||||
530
target/linux/generic-2.6/files/fs/yaffs2/yaffs_tagscompat.c
Normal file
530
target/linux/generic-2.6/files/fs/yaffs2/yaffs_tagscompat.c
Normal file
|
|
@ -0,0 +1,530 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
#include "yaffs_tagscompat.h"
|
||||
#include "yaffs_ecc.h"
|
||||
|
||||
static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND);
|
||||
#ifdef NOTYET
|
||||
static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND);
|
||||
static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
|
||||
const __u8 * data,
|
||||
const yaffs_Spare * spare);
|
||||
static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
|
||||
const yaffs_Spare * spare);
|
||||
static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND);
|
||||
#endif
|
||||
|
||||
static const char yaffs_countBitsTable[256] = {
|
||||
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
|
||||
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
||||
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
||||
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
||||
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
||||
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
||||
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
||||
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
||||
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
||||
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
||||
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
||||
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
||||
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
||||
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
||||
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
||||
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
|
||||
};
|
||||
|
||||
int yaffs_CountBits(__u8 x)
|
||||
{
|
||||
int retVal;
|
||||
retVal = yaffs_countBitsTable[x];
|
||||
return retVal;
|
||||
}
|
||||
|
||||
/********** Tags ECC calculations *********/
|
||||
|
||||
void yaffs_CalcECC(const __u8 * data, yaffs_Spare * spare)
|
||||
{
|
||||
yaffs_ECCCalculate(data, spare->ecc1);
|
||||
yaffs_ECCCalculate(&data[256], spare->ecc2);
|
||||
}
|
||||
|
||||
void yaffs_CalcTagsECC(yaffs_Tags * tags)
|
||||
{
|
||||
/* Calculate an ecc */
|
||||
|
||||
unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;
|
||||
unsigned i, j;
|
||||
unsigned ecc = 0;
|
||||
unsigned bit = 0;
|
||||
|
||||
tags->ecc = 0;
|
||||
|
||||
for (i = 0; i < 8; i++) {
|
||||
for (j = 1; j & 0xff; j <<= 1) {
|
||||
bit++;
|
||||
if (b[i] & j) {
|
||||
ecc ^= bit;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
tags->ecc = ecc;
|
||||
|
||||
}
|
||||
|
||||
int yaffs_CheckECCOnTags(yaffs_Tags * tags)
|
||||
{
|
||||
unsigned ecc = tags->ecc;
|
||||
|
||||
yaffs_CalcTagsECC(tags);
|
||||
|
||||
ecc ^= tags->ecc;
|
||||
|
||||
if (ecc && ecc <= 64) {
|
||||
/* TODO: Handle the failure better. Retire? */
|
||||
unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;
|
||||
|
||||
ecc--;
|
||||
|
||||
b[ecc / 8] ^= (1 << (ecc & 7));
|
||||
|
||||
/* Now recvalc the ecc */
|
||||
yaffs_CalcTagsECC(tags);
|
||||
|
||||
return 1; /* recovered error */
|
||||
} else if (ecc) {
|
||||
/* Wierd ecc failure value */
|
||||
/* TODO Need to do somethiong here */
|
||||
return -1; /* unrecovered error */
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/********** Tags **********/
|
||||
|
||||
static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr,
|
||||
yaffs_Tags * tagsPtr)
|
||||
{
|
||||
yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
|
||||
|
||||
yaffs_CalcTagsECC(tagsPtr);
|
||||
|
||||
sparePtr->tagByte0 = tu->asBytes[0];
|
||||
sparePtr->tagByte1 = tu->asBytes[1];
|
||||
sparePtr->tagByte2 = tu->asBytes[2];
|
||||
sparePtr->tagByte3 = tu->asBytes[3];
|
||||
sparePtr->tagByte4 = tu->asBytes[4];
|
||||
sparePtr->tagByte5 = tu->asBytes[5];
|
||||
sparePtr->tagByte6 = tu->asBytes[6];
|
||||
sparePtr->tagByte7 = tu->asBytes[7];
|
||||
}
|
||||
|
||||
static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr,
|
||||
yaffs_Tags * tagsPtr)
|
||||
{
|
||||
yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
|
||||
int result;
|
||||
|
||||
tu->asBytes[0] = sparePtr->tagByte0;
|
||||
tu->asBytes[1] = sparePtr->tagByte1;
|
||||
tu->asBytes[2] = sparePtr->tagByte2;
|
||||
tu->asBytes[3] = sparePtr->tagByte3;
|
||||
tu->asBytes[4] = sparePtr->tagByte4;
|
||||
tu->asBytes[5] = sparePtr->tagByte5;
|
||||
tu->asBytes[6] = sparePtr->tagByte6;
|
||||
tu->asBytes[7] = sparePtr->tagByte7;
|
||||
|
||||
result = yaffs_CheckECCOnTags(tagsPtr);
|
||||
if (result > 0) {
|
||||
dev->tagsEccFixed++;
|
||||
} else if (result < 0) {
|
||||
dev->tagsEccUnfixed++;
|
||||
}
|
||||
}
|
||||
|
||||
static void yaffs_SpareInitialise(yaffs_Spare * spare)
|
||||
{
|
||||
memset(spare, 0xFF, sizeof(yaffs_Spare));
|
||||
}
|
||||
|
||||
static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,
|
||||
int chunkInNAND, const __u8 * data,
|
||||
yaffs_Spare * spare)
|
||||
{
|
||||
if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR("**>> yaffs chunk %d is not valid" TENDSTR),
|
||||
chunkInNAND));
|
||||
return YAFFS_FAIL;
|
||||
}
|
||||
|
||||
dev->nPageWrites++;
|
||||
return dev->writeChunkToNAND(dev, chunkInNAND, data, spare);
|
||||
}
|
||||
|
||||
static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
|
||||
int chunkInNAND,
|
||||
__u8 * data,
|
||||
yaffs_Spare * spare,
|
||||
yaffs_ECCResult * eccResult,
|
||||
int doErrorCorrection)
|
||||
{
|
||||
int retVal;
|
||||
yaffs_Spare localSpare;
|
||||
|
||||
dev->nPageReads++;
|
||||
|
||||
if (!spare && data) {
|
||||
/* If we don't have a real spare, then we use a local one. */
|
||||
/* Need this for the calculation of the ecc */
|
||||
spare = &localSpare;
|
||||
}
|
||||
|
||||
if (!dev->useNANDECC) {
|
||||
retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare);
|
||||
if (data && doErrorCorrection) {
|
||||
/* Do ECC correction */
|
||||
/* Todo handle any errors */
|
||||
int eccResult1, eccResult2;
|
||||
__u8 calcEcc[3];
|
||||
|
||||
yaffs_ECCCalculate(data, calcEcc);
|
||||
eccResult1 =
|
||||
yaffs_ECCCorrect(data, spare->ecc1, calcEcc);
|
||||
yaffs_ECCCalculate(&data[256], calcEcc);
|
||||
eccResult2 =
|
||||
yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc);
|
||||
|
||||
if (eccResult1 > 0) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>>yaffs ecc error fix performed on chunk %d:0"
|
||||
TENDSTR), chunkInNAND));
|
||||
dev->eccFixed++;
|
||||
} else if (eccResult1 < 0) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>>yaffs ecc error unfixed on chunk %d:0"
|
||||
TENDSTR), chunkInNAND));
|
||||
dev->eccUnfixed++;
|
||||
}
|
||||
|
||||
if (eccResult2 > 0) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>>yaffs ecc error fix performed on chunk %d:1"
|
||||
TENDSTR), chunkInNAND));
|
||||
dev->eccFixed++;
|
||||
} else if (eccResult2 < 0) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>>yaffs ecc error unfixed on chunk %d:1"
|
||||
TENDSTR), chunkInNAND));
|
||||
dev->eccUnfixed++;
|
||||
}
|
||||
|
||||
if (eccResult1 || eccResult2) {
|
||||
/* We had a data problem on this page */
|
||||
yaffs_HandleReadDataError(dev, chunkInNAND);
|
||||
}
|
||||
|
||||
if (eccResult1 < 0 || eccResult2 < 0)
|
||||
*eccResult = YAFFS_ECC_RESULT_UNFIXED;
|
||||
else if (eccResult1 > 0 || eccResult2 > 0)
|
||||
*eccResult = YAFFS_ECC_RESULT_FIXED;
|
||||
else
|
||||
*eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
||||
}
|
||||
} else {
|
||||
/* Must allocate enough memory for spare+2*sizeof(int) */
|
||||
/* for ecc results from device. */
|
||||
struct yaffs_NANDSpare nspare;
|
||||
retVal =
|
||||
dev->readChunkFromNAND(dev, chunkInNAND, data,
|
||||
(yaffs_Spare *) & nspare);
|
||||
memcpy(spare, &nspare, sizeof(yaffs_Spare));
|
||||
if (data && doErrorCorrection) {
|
||||
if (nspare.eccres1 > 0) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>>mtd ecc error fix performed on chunk %d:0"
|
||||
TENDSTR), chunkInNAND));
|
||||
} else if (nspare.eccres1 < 0) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>>mtd ecc error unfixed on chunk %d:0"
|
||||
TENDSTR), chunkInNAND));
|
||||
}
|
||||
|
||||
if (nspare.eccres2 > 0) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>>mtd ecc error fix performed on chunk %d:1"
|
||||
TENDSTR), chunkInNAND));
|
||||
} else if (nspare.eccres2 < 0) {
|
||||
T(YAFFS_TRACE_ERROR,
|
||||
(TSTR
|
||||
("**>>mtd ecc error unfixed on chunk %d:1"
|
||||
TENDSTR), chunkInNAND));
|
||||
}
|
||||
|
||||
if (nspare.eccres1 || nspare.eccres2) {
|
||||
/* We had a data problem on this page */
|
||||
yaffs_HandleReadDataError(dev, chunkInNAND);
|
||||
}
|
||||
|
||||
if (nspare.eccres1 < 0 || nspare.eccres2 < 0)
|
||||
*eccResult = YAFFS_ECC_RESULT_UNFIXED;
|
||||
else if (nspare.eccres1 > 0 || nspare.eccres2 > 0)
|
||||
*eccResult = YAFFS_ECC_RESULT_FIXED;
|
||||
else
|
||||
*eccResult = YAFFS_ECC_RESULT_NO_ERROR;
|
||||
|
||||
}
|
||||
}
|
||||
return retVal;
|
||||
}
|
||||
|
||||
#ifdef NOTYET
|
||||
static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
|
||||
int chunkInNAND)
|
||||
{
|
||||
|
||||
static int init = 0;
|
||||
static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
|
||||
static __u8 data[YAFFS_BYTES_PER_CHUNK];
|
||||
/* Might as well always allocate the larger size for */
|
||||
/* dev->useNANDECC == true; */
|
||||
static __u8 spare[sizeof(struct yaffs_NANDSpare)];
|
||||
|
||||
dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare);
|
||||
|
||||
if (!init) {
|
||||
memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK);
|
||||
init = 1;
|
||||
}
|
||||
|
||||
if (memcmp(cmpbuf, data, YAFFS_BYTES_PER_CHUNK))
|
||||
return YAFFS_FAIL;
|
||||
if (memcmp(cmpbuf, spare, 16))
|
||||
return YAFFS_FAIL;
|
||||
|
||||
return YAFFS_OK;
|
||||
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Functions for robustisizing
|
||||
*/
|
||||
|
||||
static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND)
|
||||
{
|
||||
int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
|
||||
|
||||
/* Mark the block for retirement */
|
||||
yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
|
||||
T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
|
||||
(TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND));
|
||||
|
||||
/* TODO:
|
||||
* Just do a garbage collection on the affected block
|
||||
* then retire the block
|
||||
* NB recursion
|
||||
*/
|
||||
}
|
||||
|
||||
#ifdef NOTYET
|
||||
static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND)
|
||||
{
|
||||
}
|
||||
|
||||
static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
|
||||
const __u8 * data,
|
||||
const yaffs_Spare * spare)
|
||||
{
|
||||
}
|
||||
|
||||
static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
|
||||
const yaffs_Spare * spare)
|
||||
{
|
||||
}
|
||||
|
||||
static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND)
|
||||
{
|
||||
int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
|
||||
|
||||
/* Mark the block for retirement */
|
||||
yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
|
||||
/* Delete the chunk */
|
||||
yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
|
||||
}
|
||||
|
||||
static int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1,
|
||||
const yaffs_Spare * s0, const yaffs_Spare * s1)
|
||||
{
|
||||
|
||||
if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 ||
|
||||
s0->tagByte0 != s1->tagByte0 ||
|
||||
s0->tagByte1 != s1->tagByte1 ||
|
||||
s0->tagByte2 != s1->tagByte2 ||
|
||||
s0->tagByte3 != s1->tagByte3 ||
|
||||
s0->tagByte4 != s1->tagByte4 ||
|
||||
s0->tagByte5 != s1->tagByte5 ||
|
||||
s0->tagByte6 != s1->tagByte6 ||
|
||||
s0->tagByte7 != s1->tagByte7 ||
|
||||
s0->ecc1[0] != s1->ecc1[0] ||
|
||||
s0->ecc1[1] != s1->ecc1[1] ||
|
||||
s0->ecc1[2] != s1->ecc1[2] ||
|
||||
s0->ecc2[0] != s1->ecc2[0] ||
|
||||
s0->ecc2[1] != s1->ecc2[1] || s0->ecc2[2] != s1->ecc2[2]) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
#endif /* NOTYET */
|
||||
|
||||
int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev,
|
||||
int chunkInNAND,
|
||||
const __u8 * data,
|
||||
const yaffs_ExtendedTags *
|
||||
eTags)
|
||||
{
|
||||
yaffs_Spare spare;
|
||||
yaffs_Tags tags;
|
||||
|
||||
yaffs_SpareInitialise(&spare);
|
||||
|
||||
if (eTags->chunkDeleted) {
|
||||
spare.pageStatus = 0;
|
||||
} else {
|
||||
tags.objectId = eTags->objectId;
|
||||
tags.chunkId = eTags->chunkId;
|
||||
tags.byteCount = eTags->byteCount;
|
||||
tags.serialNumber = eTags->serialNumber;
|
||||
|
||||
if (!dev->useNANDECC && data) {
|
||||
yaffs_CalcECC(data, &spare);
|
||||
}
|
||||
yaffs_LoadTagsIntoSpare(&spare, &tags);
|
||||
|
||||
}
|
||||
|
||||
return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare);
|
||||
}
|
||||
|
||||
int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
|
||||
int chunkInNAND,
|
||||
__u8 * data,
|
||||
yaffs_ExtendedTags * eTags)
|
||||
{
|
||||
|
||||
yaffs_Spare spare;
|
||||
yaffs_Tags tags;
|
||||
yaffs_ECCResult eccResult;
|
||||
|
||||
static yaffs_Spare spareFF;
|
||||
static int init;
|
||||
|
||||
if (!init) {
|
||||
memset(&spareFF, 0xFF, sizeof(spareFF));
|
||||
init = 1;
|
||||
}
|
||||
|
||||
if (yaffs_ReadChunkFromNAND
|
||||
(dev, chunkInNAND, data, &spare, &eccResult, 1)) {
|
||||
/* eTags may be NULL */
|
||||
if (eTags) {
|
||||
|
||||
int deleted =
|
||||
(yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
|
||||
|
||||
eTags->chunkDeleted = deleted;
|
||||
eTags->eccResult = eccResult;
|
||||
eTags->blockBad = 0; /* We're reading it */
|
||||
/* therefore it is not a bad block */
|
||||
eTags->chunkUsed =
|
||||
(memcmp(&spareFF, &spare, sizeof(spareFF)) !=
|
||||
0) ? 1 : 0;
|
||||
|
||||
if (eTags->chunkUsed) {
|
||||
yaffs_GetTagsFromSpare(dev, &spare, &tags);
|
||||
|
||||
eTags->objectId = tags.objectId;
|
||||
eTags->chunkId = tags.chunkId;
|
||||
eTags->byteCount = tags.byteCount;
|
||||
eTags->serialNumber = tags.serialNumber;
|
||||
}
|
||||
}
|
||||
|
||||
return YAFFS_OK;
|
||||
} else {
|
||||
return YAFFS_FAIL;
|
||||
}
|
||||
}
|
||||
|
||||
int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
|
||||
int blockInNAND)
|
||||
{
|
||||
|
||||
yaffs_Spare spare;
|
||||
|
||||
memset(&spare, 0xff, sizeof(yaffs_Spare));
|
||||
|
||||
spare.blockStatus = 'Y';
|
||||
|
||||
yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL,
|
||||
&spare);
|
||||
yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1,
|
||||
NULL, &spare);
|
||||
|
||||
return YAFFS_OK;
|
||||
|
||||
}
|
||||
|
||||
int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
|
||||
int blockNo, yaffs_BlockState *
|
||||
state,
|
||||
int *sequenceNumber)
|
||||
{
|
||||
|
||||
yaffs_Spare spare0, spare1;
|
||||
static yaffs_Spare spareFF;
|
||||
static int init;
|
||||
yaffs_ECCResult dummy;
|
||||
|
||||
if (!init) {
|
||||
memset(&spareFF, 0xFF, sizeof(spareFF));
|
||||
init = 1;
|
||||
}
|
||||
|
||||
*sequenceNumber = 0;
|
||||
|
||||
yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL,
|
||||
&spare0, &dummy, 1);
|
||||
yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL,
|
||||
&spare1, &dummy, 1);
|
||||
|
||||
if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
|
||||
*state = YAFFS_BLOCK_STATE_DEAD;
|
||||
else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0)
|
||||
*state = YAFFS_BLOCK_STATE_EMPTY;
|
||||
else
|
||||
*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
|
||||
|
||||
return YAFFS_OK;
|
||||
}
|
||||
40
target/linux/generic-2.6/files/fs/yaffs2/yaffs_tagscompat.h
Normal file
40
target/linux/generic-2.6/files/fs/yaffs2/yaffs_tagscompat.h
Normal file
|
|
@ -0,0 +1,40 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
#ifndef __YAFFS_TAGSCOMPAT_H__
|
||||
#define __YAFFS_TAGSCOMPAT_H__
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev,
|
||||
int chunkInNAND,
|
||||
const __u8 * data,
|
||||
const yaffs_ExtendedTags *
|
||||
tags);
|
||||
int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
|
||||
int chunkInNAND,
|
||||
__u8 * data,
|
||||
yaffs_ExtendedTags *
|
||||
tags);
|
||||
int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev,
|
||||
int blockNo);
|
||||
int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
|
||||
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
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
/*
|
||||
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include "yaffs_tagsvalidity.h"
|
||||
|
||||
void yaffs_InitialiseTags(yaffs_ExtendedTags * tags)
|
||||
{
|
||||
memset(tags, 0, sizeof(yaffs_ExtendedTags));
|
||||
tags->validMarker0 = 0xAAAAAAAA;
|
||||
tags->validMarker1 = 0x55555555;
|
||||
}
|
||||
|
||||
int yaffs_ValidateTags(yaffs_ExtendedTags * tags)
|
||||
{
|
||||
return (tags->validMarker0 == 0xAAAAAAAA &&
|
||||
tags->validMarker1 == 0x55555555);
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
|
||||
#ifndef __YAFFS_TAGS_VALIDITY_H__
|
||||
#define __YAFFS_TAGS_VALIDITY_H__
|
||||
|
||||
#include "yaffs_guts.h"
|
||||
|
||||
void yaffs_InitialiseTags(yaffs_ExtendedTags * tags);
|
||||
int yaffs_ValidateTags(yaffs_ExtendedTags * tags);
|
||||
#endif
|
||||
21
target/linux/generic-2.6/files/fs/yaffs2/yaffsinterface.h
Normal file
21
target/linux/generic-2.6/files/fs/yaffs2/yaffsinterface.h
Normal file
|
|
@ -0,0 +1,21 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
#ifndef __YAFFSINTERFACE_H__
|
||||
#define __YAFFSINTERFACE_H__
|
||||
|
||||
int yaffs_Initialise(unsigned nBlocks);
|
||||
|
||||
#endif
|
||||
186
target/linux/generic-2.6/files/fs/yaffs2/yportenv.h
Normal file
186
target/linux/generic-2.6/files/fs/yaffs2/yportenv.h
Normal file
|
|
@ -0,0 +1,186 @@
|
|||
/*
|
||||
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
|
||||
*
|
||||
* Copyright (C) 2002-2007 Aleph One Ltd.
|
||||
* for Toby Churchill Ltd and Brightstar Engineering
|
||||
*
|
||||
* Created by Charles Manning <charles@aleph1.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License version 2.1 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
|
||||
*/
|
||||
|
||||
|
||||
#ifndef __YPORTENV_H__
|
||||
#define __YPORTENV_H__
|
||||
|
||||
#if defined CONFIG_YAFFS_WINCE
|
||||
|
||||
#include "ywinceenv.h"
|
||||
|
||||
#elif defined __KERNEL__
|
||||
|
||||
#include "moduleconfig.h"
|
||||
|
||||
/* Linux kernel */
|
||||
#include <linux/version.h>
|
||||
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
|
||||
#include <linux/config.h>
|
||||
#endif
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/vmalloc.h>
|
||||
|
||||
#define YCHAR char
|
||||
#define YUCHAR unsigned char
|
||||
#define _Y(x) x
|
||||
#define yaffs_strcpy(a,b) strcpy(a,b)
|
||||
#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
|
||||
#define yaffs_strncmp(a,b,c) strncmp(a,b,c)
|
||||
#define yaffs_strlen(s) strlen(s)
|
||||
#define yaffs_sprintf sprintf
|
||||
#define yaffs_toupper(a) toupper(a)
|
||||
|
||||
#define Y_INLINE inline
|
||||
|
||||
#define YAFFS_LOSTNFOUND_NAME "lost+found"
|
||||
#define YAFFS_LOSTNFOUND_PREFIX "obj"
|
||||
|
||||
/* #define YPRINTF(x) printk x */
|
||||
#define YMALLOC(x) kmalloc(x,GFP_KERNEL)
|
||||
#define YFREE(x) kfree(x)
|
||||
#define YMALLOC_ALT(x) vmalloc(x)
|
||||
#define YFREE_ALT(x) vfree(x)
|
||||
#define YMALLOC_DMA(x) YMALLOC(x)
|
||||
|
||||
// KR - added for use in scan so processes aren't blocked indefinitely.
|
||||
#define YYIELD() schedule()
|
||||
|
||||
#define YAFFS_ROOT_MODE 0666
|
||||
#define YAFFS_LOSTNFOUND_MODE 0666
|
||||
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
|
||||
#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
|
||||
#define Y_TIME_CONVERT(x) (x).tv_sec
|
||||
#else
|
||||
#define Y_CURRENT_TIME CURRENT_TIME
|
||||
#define Y_TIME_CONVERT(x) (x)
|
||||
#endif
|
||||
|
||||
#define yaffs_SumCompare(x,y) ((x) == (y))
|
||||
#define yaffs_strcmp(a,b) strcmp(a,b)
|
||||
|
||||
#define TENDSTR "\n"
|
||||
#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 */
|
||||
#include "ydirectenv.h"
|
||||
|
||||
#elif defined CONFIG_YAFFS_UTIL
|
||||
|
||||
/* Stuff for YAFFS utilities */
|
||||
|
||||
#include "stdlib.h"
|
||||
#include "stdio.h"
|
||||
#include "string.h"
|
||||
|
||||
#include "devextras.h"
|
||||
|
||||
#define YMALLOC(x) malloc(x)
|
||||
#define YFREE(x) free(x)
|
||||
#define YMALLOC_ALT(x) malloc(x)
|
||||
#define YFREE_ALT(x) free(x)
|
||||
|
||||
#define YCHAR char
|
||||
#define YUCHAR unsigned char
|
||||
#define _Y(x) x
|
||||
#define yaffs_strcpy(a,b) strcpy(a,b)
|
||||
#define yaffs_strncpy(a,b,c) strncpy(a,b,c)
|
||||
#define yaffs_strlen(s) strlen(s)
|
||||
#define yaffs_sprintf sprintf
|
||||
#define yaffs_toupper(a) toupper(a)
|
||||
|
||||
#define Y_INLINE inline
|
||||
|
||||
/* #define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s)) */
|
||||
/* #define YALERT(s) YINFO(s) */
|
||||
|
||||
#define TENDSTR "\n"
|
||||
#define TSTR(x) x
|
||||
#define TOUT(p) printf p
|
||||
|
||||
#define YAFFS_LOSTNFOUND_NAME "lost+found"
|
||||
#define YAFFS_LOSTNFOUND_PREFIX "obj"
|
||||
/* #define YPRINTF(x) printf x */
|
||||
|
||||
#define YAFFS_ROOT_MODE 0666
|
||||
#define YAFFS_LOSTNFOUND_MODE 0666
|
||||
|
||||
#define yaffs_SumCompare(x,y) ((x) == (y))
|
||||
#define yaffs_strcmp(a,b) strcmp(a,b)
|
||||
|
||||
#else
|
||||
/* Should have specified a configuration type */
|
||||
#error Unknown configuration
|
||||
|
||||
#endif
|
||||
|
||||
/* see yaffs_fs.c */
|
||||
extern unsigned int yaffs_traceMask;
|
||||
extern unsigned int yaffs_wr_attempts;
|
||||
|
||||
/*
|
||||
* Tracing flags.
|
||||
* The flags masked in YAFFS_TRACE_ALWAYS are always traced.
|
||||
*/
|
||||
|
||||
#define YAFFS_TRACE_OS 0x00000002
|
||||
#define YAFFS_TRACE_ALLOCATE 0x00000004
|
||||
#define YAFFS_TRACE_SCAN 0x00000008
|
||||
#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
|
||||
#define YAFFS_TRACE_ERASE 0x00000020
|
||||
#define YAFFS_TRACE_GC 0x00000040
|
||||
#define YAFFS_TRACE_WRITE 0x00000080
|
||||
#define YAFFS_TRACE_TRACING 0x00000100
|
||||
#define YAFFS_TRACE_DELETION 0x00000200
|
||||
#define YAFFS_TRACE_BUFFERS 0x00000400
|
||||
#define YAFFS_TRACE_NANDACCESS 0x00000800
|
||||
#define YAFFS_TRACE_GC_DETAIL 0x00001000
|
||||
#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
|
||||
#define YAFFS_TRACE_MTD 0x00004000
|
||||
#define YAFFS_TRACE_CHECKPOINT 0x00008000
|
||||
|
||||
#define YAFFS_TRACE_VERIFY 0x00010000
|
||||
#define YAFFS_TRACE_VERIFY_NAND 0x00020000
|
||||
#define YAFFS_TRACE_VERIFY_FULL 0x00040000
|
||||
#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
|
||||
|
||||
|
||||
#define YAFFS_TRACE_ERROR 0x40000000
|
||||
#define YAFFS_TRACE_BUG 0x80000000
|
||||
#define YAFFS_TRACE_ALWAYS 0xF0000000
|
||||
|
||||
|
||||
#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p);} while(0)
|
||||
|
||||
#ifndef CONFIG_YAFFS_WINCE
|
||||
#define YBUG() T(YAFFS_TRACE_BUG,(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),__LINE__))
|
||||
#endif
|
||||
|
||||
#endif
|
||||
File diff suppressed because it is too large
Load diff
File diff suppressed because it is too large
Load diff
File diff suppressed because it is too large
Load diff
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Reference in a new issue