[Yaffs] linux-2.6.13-rc6 and cvs yaffs

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Author: Manav Gautam
Date:  
To: YAFFS mailing list
Subject: [Yaffs] linux-2.6.13-rc6 and cvs yaffs
Dear All,
             I have a build with the cvs version of yaffs1/yaffs2
integrated. I can successfully mount the partition and copy
large/small files to the chip without any problems. The issue is that
all the data is lost when i umount and remount it .  I have tried this
with different kernel versions , frank's yaffs patch , balloon
kernels, cvs yaffs but the issue remains the same. Below is a detailed
log
My .config is 
CONFIG_YAFFS_FS=y
CONFIG_YAFFS_YAFFS1=y
CONFIG_YAFFS_DOES_ECC=n
CONFIG_YAFFS_ECC_WRONG_ORDER=y
CONFIG_YAFFS_YAFFS2=y (* Had to enable this else it compilation cracks up) 
CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK=y
CONFIG_YAFFS_SHORT_NAMES_IN_RAM=y


[root@Sarva 2.6.13]#insmod manavd.ko
.........
Bad eraseblock 4087 at 0x03fdc000
Bad eraseblock 4088 at 0x03fe0000
Bad eraseblock 4091 at 0x03fec000
Bad eraseblock 4092 at 0x03ff0000
Bad eraseblock 4093 at 0x03ff4000
Creating 1 MTD partitions on "NAND 64MiB 3,3V 8-bit":
0x00000000-0x04000000 : "Filesystem on nand"
mtd: Giving out device 3 to Filesystem on nand
Sarva_mtd->erasesize = 16384
Sarva_mtd->oobblock = 512
Sarva_mtd->oobsize = 16
Sarva_mtd->eccsize = 256
Sarva_chip->page_shift = 9


[root@Sarva ] mount -t yaffs /dev/mtdblock3 /mnt/flash/
........................................
Block scanning block 4091 state 3 seq 0
Block empty
Block scanning block 4092 state 8 seq 0
block 4092 is bad
Block scanning block 4093 state 8 seq 0
block 4093 is bad
Block scanning block 4094 state 8 seq 0
block 4094 is bad
Block scanning block 4095 state 3 seq 0
Block empty
Block scanning block 4096 state 3 seq 0
Block empty
yaffs_Scan ends
yaffs: yaffs_GutsInitialise() done.

yaffs_read_super: guts initialised OK
yaffs_read_super: got root inode
yaffs_read_super: d_alloc_root done
yaffs_read_super: done

[root@Sarva /mnt]#ls
cf         flash      image.img  jffs2      usb



[root@Sarva 2.6.13]#df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/mtdblock2           31488     25056      6432  80% /
/dev/mtdblock3           65536     41072     24464  63% /mnt/flash


[root@Sarva 2.6.13]#cat /proc/yaffs
YAFFS built:Aug 25 2005 09:02:20
$Id: yaffs_fs.c,v 1.29 2005/08/11 01:07:43 marty Exp $
$Id: yaffs_guts.c,v 1.18 2005/08/16 02:28:04 charles Exp $

Device 0 "Filesystem on nand"
startBlock......... 0
endBlock........... 4095
chunkGroupBits..... 2
chunkGroupSize..... 4
nErasedBlocks...... 1535
nTnodesCreated..... 0
nFreeTnodes........ 0
nObjectsCreated.... 100
nFreeObjects....... 96
nFreeChunks........ 49120
nPageWrites........ 0
nPageReads......... 0
nBlockErasures..... 0
nGCCopies.......... 0
garbageCollections. 0
passiveGCs......... 0
nRetriedWrites..... 0
nRetireBlocks...... 0
eccFixed........... 0
eccUnfixed......... 0
tagsEccFixed....... 0
tagsEccUnfixed..... 0
cacheHits.......... 0
nDeletedFiles...... 0
nUnlinkedFiles..... 0
nBackgroudDeletions 0
useNANDECC......... 1
isYaffs2........... 0

[root@Sarva 2.6.13]#cp /root/exp/nanddump.c /mnt/flash/
yaffs_mknod: making oject for nanddump.c, mode 81a4 dev 0
yaffs: Tnodes added
Allocated block 1, seq 4097, 1534 left
Writing chunk 0 tags 261 0
Inside yaffs_WriteChunkWithTagsToNAND<7>yaffs_get_inode for object 261
Writing chunk 1 tags 261 1
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 2 tags 261 2
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 3 tags 261 3
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 4 tags 261 4
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 5 tags 261 5
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 6 tags 261 6
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 7 tags 261 7
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 8 tags 261 8
Inside yaffs_WriteChunkWithTagsToNAND<7>yaffs_file_write writing 4096
bytes, 4096 written at 0
Chunk -1 not found zero instead
Chunk -1 not found zero instead
Chunk -1 not found zero instead
Chunk -1 not found zero instead
Chunk -1 not found zero instead
Chunk -1 not found zero instead
Chunk -1 not found zero instead
Chunk -1 not found zero instead
Writing chunk 9 tags 261 9
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 10 tags 261 10
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 11 tags 261 11
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 12 tags 261 12
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 13 tags 261 13
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 14 tags 261 14
Inside yaffs_WriteChunkWithTagsToNAND<4>Chunk -1 not found zero instead
Writing chunk 15 tags 261 15
Inside yaffs_WriteChunkWithTagsToNAND<4>Writing chunk 16 tags 261 0
Inside yaffs_WriteChunkWithTagsToNAND<4>line 2865 delete of chunk 32
Writing chunk 0 tags 0 0
Inside yaffs_WriteChunkWithTagsToNAND<7>yaffs unlocking

[root@Sarva 2.6.13]#df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/mtdblock2           31488     25056      6432  80% /
/dev/mtdblock3           65536     41080     24456  63% /mnt/flash
[root@Sarva 2.6.13]#cat /proc/yaffs
YAFFS built:Aug 25 2005 09:02:20
$Id: yaffs_fs.c,v 1.29 2005/08/11 01:07:43 marty Exp $
$Id: yaffs_guts.c,v 1.18 2005/08/16 02:28:04 charles Exp $


Device 0 "Filesystem on nand"
startBlock......... 0
endBlock........... 4095
chunkGroupBits..... 2
chunkGroupSize..... 4
nErasedBlocks...... 1534
nTnodesCreated..... 100
nFreeTnodes........ 99
nObjectsCreated.... 100
nFreeObjects....... 95
nFreeChunks........ 49104
nPageWrites........ 18
nPageReads......... 1
nBlockErasures..... 0
nGCCopies.......... 0
garbageCollections. 0
passiveGCs......... 0
nRetriedWrites..... 0
nRetireBlocks...... 0
eccFixed........... 0
eccUnfixed......... 0
tagsEccFixed....... 0
tagsEccUnfixed..... 0
cacheHits.......... 0
nDeletedFiles...... 0
nUnlinkedFiles..... 0
nBackgroudDeletions 0
useNANDECC......... 1
isYaffs2........... 0

[root@Sarva 2.6.13]#cd /mnt/flash/
[root@Sarva flash]#ls -la
yaffs_readdir: starting at 0
yaffs_readdir: starting at 4
drw-rw-rw-    1 root     root          512 Jan  1 00:04 .
drwxr-xr-x    6 root     root            0 Jan  1 00:12 ..
drw-rw-rw-    1 root     root          512 Jan  1 00:04 lost+found
-rw-r--r--    1 root     root         7372 Jan  1 00:05 nanddump.c



[root@Sarva /mnt]#umount flash/
yaffs_put_inode: ino 261, count 1
yaffs_put_inode: ino 2, count 1
yaffs_put_inode: ino 1, count 1
yaffs_put_inode: ino 1, count 1
yaffs_clear_inode: ino 1, count 0 object exists
yaffs_clear_inode: ino 261, count 0 object exists
yaffs_clear_inode: ino 2, count 0 object exists

lets mount and see again
[root@Sarva /mnt]#mount -t yaffs /dev/mtdblock3 /mnt/usb/
...........
Block scanning block 4091 state 3 seq 0
Block empty
Block scanning block 4092 state 8 seq 0
block 4092 is bad
Block scanning block 4093 state 8 seq 0
block 4093 is bad
Block scanning block 4094 state 8 seq 0
block 4094 is bad
Block scanning block 4095 state 3 seq 0
Block empty
Block scanning block 4096 state 3 seq 0
Block empty
yaffs_Scan ends
yaffs: yaffs_GutsInitialise() done.

yaffs_read_super: guts initialised OK
yaffs_read_super: got root inode
yaffs_read_super: d_alloc_root done
yaffs_read_super: done
[root@Sarva /mnt]#df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/mtdblock2           31488     25056      6432  80% /
/dev/mtdblock3           65536     41056     24480  63% /mnt/flash


[root@Sarva /mnt]#cd flash/
[root@Sarva flash]#ls
yaffs_readdir: starting at 0
yaffs_readdir: starting at 3
lost+found
[root@Sarva flash]#

My nand driver is a implementation of spia and drives a samsung k9f1208UOM 
/*
 *  drivers/mtd/nand/spia.c
 *
 *  Copyright (C) 2000 Steven J. Hill ()
 *
 *
 *      10-29-2001 TG   change to support hardwarespecific access
 *                      to controllines (due to change in nand.c)
 *                      page_cache added
 *
 * $Id: spia.c,v 1.21 2003/07/11 15:12:29 dwmw2 Exp $
 *
 * 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.
 *
 *  Overview:
 *   This is a device driver for the NAND flash device found on the
 *   SPIA board which utilizes the Toshiba TC58V64AFT part. This is
 *   a 64Mibit (8MiB x 8 bits) NAND flash device.
 */


#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <asm/io.h>
#include <asm/sizes.h>
#include <asm/arch-pxa/pxa-regs.h>
/*
* MTD structure for SPIA board
*/
static struct mtd_info *spia_mtd = NULL;

/*
* Values specific to the SPIA board (used with EP7212 processor)
*/

#define SPIA_FIO_BASE   0x06000000      /* Address where flash is mapped */


static unsigned char data_buf[512+16];
static unsigned char oob_buf[16*32];

static struct nand_oobinfo nand_oobsel = {
        useecc: 1,
        eccbytes: 6,
        eccpos: {8, 9, 10, 13, 14, 15}
};


static int spia_fio_base = SPIA_FIO_BASE;


/*
 * Define partitions for flash device
 */
const static struct mtd_partition partition_info[] = {
        { name: "Filesystem on nand",
                offset: 0,
                oobsel: &nand_oobsel,
                size:   64 * SZ_1M},
};
#define NUM_PARTITIONS 1



/*
 *      hardware specific access to control-lines
*/
static void spia_hwcontrol(struct mtd_info *mtd, int cmd){


    switch(cmd){


        case NAND_CTL_SETCLE: GPSR2 = 0x80000;   break;
        case NAND_CTL_CLRCLE:GPCR2 = 0x80000;   break;


        case NAND_CTL_SETALE: GPSR2 = 0x100000; break;
        case NAND_CTL_CLRALE: GPCR2 = 0x100000;  break;


        case NAND_CTL_SETNCE: GPCR2 = 0x20000; break;
        case NAND_CTL_CLRNCE: GPSR2 = 0x20000; break;
    }
}


/*
 * Main initialization routine
 */
int __init spia_init (void)
{
        struct nand_chip *this;
        GPSR2 = 0x60000;
        GPDR2 |= 0x1e0000;


        GPCR2 = 0x20000;
        /* Allocate memory for MTD device structure and private data */
        spia_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
                                GFP_KERNEL);
        if (!spia_mtd) {
                printk ("Unable to allocate SPIA NAND MTD device structure.\n");
                return -ENOMEM;
        }


        /* Get pointer to private data */
        this = (struct nand_chip *) (&spia_mtd[1]);


        /* Initialize structures */
        memset((char *) spia_mtd, 0, sizeof(struct mtd_info));
        memset((char *) this, 0, sizeof(struct nand_chip));
        spia_fio_base=(unsigned long)ioremap(spia_fio_base,SZ_1K);
        /* Link the private data with the MTD structure */
        spia_mtd->priv = this;



        /* Set address of NAND IO lines */
        this->IO_ADDR_R = spia_fio_base;
        this->IO_ADDR_W = spia_fio_base;
        /* Set address of hardware control function */
        this->hwcontrol = spia_hwcontrol;
        /* 15 us command delay time */
        this->chip_delay = 20;
        this->eccmode = NAND_ECC_SOFT;
      //this->eccmode= MTD_NANDECC_PLACE;
      //  this->eccmode= NAND_ECC_NONE;


        /* Scan to find existence of the device */
        if (nand_scan (spia_mtd, 1)) {
                kfree (spia_mtd);
                return -ENXIO;
        }


        /* Allocate memory for internal data buffer */
//      this->data_buf = kmalloc (sizeof(u_char) * (spia_mtd->oobblock
+ spia_mtd->oobsize), GFP_KERNEL);
        this->data_buf = data_buf;
        this->oob_buf = oob_buf;
        if (!this->data_buf) {
                printk ("Unable to allocate NAND data buffer for SPIA.\n");
                kfree (spia_mtd);
                return -ENOMEM;
        }
        if (!this->oob_buf) {
                printk ("Unable to allocate NAND data buffer for SPIA.\n");
                kfree (spia_mtd);
                return -ENOMEM;
        }



        /* Register the partitions */
        add_mtd_partitions(spia_mtd, partition_info, NUM_PARTITIONS);
        printk("Sarva_mtd->erasesize = %d\n", spia_mtd->erasesize);
        printk("Sarva_mtd->oobblock = %d\n", spia_mtd->oobblock);
        printk("Sarva_mtd->oobsize = %d\n", spia_mtd->oobsize);
        printk("Sarva_mtd->eccsize = %d\n", spia_mtd->eccsize);
        printk("Sarva_chip->page_shift = %d\n", this->page_shift);
        /* Return happy */
        return 0;
}
module_init(spia_init);


/*
 * Clean up routine
 */
#ifdef MODULE
static void __exit spia_cleanup (void)
{
        struct nand_chip *this = (struct nand_chip *) &spia_mtd[1];


        /* Unregister the device */
        del_mtd_device (spia_mtd);


        /* Free internal data buffer */
        kfree (this->data_buf);


        /* Free the MTD device structure */
        kfree (spia_mtd);
}
module_exit(spia_cleanup);
#endif


MODULE_LICENSE("GPL");
MODULE_AUTHOR("Steven J. Hill <");
MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on SPIA board");

---------
Is there anything am overlooking ? Any clues or pointers ?

Warm regards,
manav