200 lines
5.0 KiB
C
200 lines
5.0 KiB
C
/*
|
|
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
|
|
*
|
|
* Copyright (C) 2002-2011 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_trace.h"
|
|
#include "yaffs_packedtags2.h"
|
|
|
|
static int yaffs_tags_marshall_write(struct yaffs_dev *dev,
|
|
int nand_chunk, const u8 *data,
|
|
const struct yaffs_ext_tags *tags)
|
|
{
|
|
struct yaffs_packed_tags2 pt;
|
|
int retval;
|
|
|
|
int packed_tags_size =
|
|
dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
|
|
void *packed_tags_ptr =
|
|
dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
|
|
|
|
yaffs_trace(YAFFS_TRACE_MTD,
|
|
"yaffs_tags_marshall_write chunk %d data %p tags %p",
|
|
nand_chunk, data, tags);
|
|
|
|
/* For yaffs2 writing there must be both data and tags.
|
|
* If we're using inband tags, then the tags are stuffed into
|
|
* the end of the data buffer.
|
|
*/
|
|
if (!data || !tags)
|
|
BUG();
|
|
else if (dev->param.inband_tags) {
|
|
struct yaffs_packed_tags2_tags_only *pt2tp;
|
|
pt2tp =
|
|
(struct yaffs_packed_tags2_tags_only *)(data +
|
|
dev->
|
|
data_bytes_per_chunk);
|
|
yaffs_pack_tags2_tags_only(pt2tp, tags);
|
|
} else {
|
|
yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
|
|
}
|
|
|
|
retval = dev->drv.drv_write_chunk_fn(dev, nand_chunk,
|
|
data, dev->param.total_bytes_per_chunk,
|
|
(dev->param.inband_tags) ? NULL : packed_tags_ptr,
|
|
(dev->param.inband_tags) ? 0 : packed_tags_size);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int yaffs_tags_marshall_read(struct yaffs_dev *dev,
|
|
int nand_chunk, u8 *data,
|
|
struct yaffs_ext_tags *tags)
|
|
{
|
|
int retval = 0;
|
|
int local_data = 0;
|
|
u8 spare_buffer[100];
|
|
enum yaffs_ecc_result ecc_result;
|
|
|
|
struct yaffs_packed_tags2 pt;
|
|
|
|
int packed_tags_size =
|
|
dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
|
|
void *packed_tags_ptr =
|
|
dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
|
|
|
|
yaffs_trace(YAFFS_TRACE_MTD,
|
|
"yaffs_tags_marshall_read chunk %d data %p tags %p",
|
|
nand_chunk, data, tags);
|
|
|
|
if (dev->param.inband_tags) {
|
|
if (!data) {
|
|
local_data = 1;
|
|
data = yaffs_get_temp_buffer(dev);
|
|
}
|
|
}
|
|
|
|
if (dev->param.inband_tags || (data && !tags))
|
|
retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
|
|
data, dev->param.total_bytes_per_chunk,
|
|
NULL, 0,
|
|
&ecc_result);
|
|
else if (tags)
|
|
retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
|
|
data, dev->param.total_bytes_per_chunk,
|
|
spare_buffer, packed_tags_size,
|
|
&ecc_result);
|
|
else
|
|
BUG();
|
|
|
|
|
|
if (dev->param.inband_tags) {
|
|
if (tags) {
|
|
struct yaffs_packed_tags2_tags_only *pt2tp;
|
|
pt2tp =
|
|
(struct yaffs_packed_tags2_tags_only *)
|
|
&data[dev->data_bytes_per_chunk];
|
|
yaffs_unpack_tags2_tags_only(tags, pt2tp);
|
|
}
|
|
} else if (tags) {
|
|
memcpy(packed_tags_ptr, spare_buffer, packed_tags_size);
|
|
yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
|
|
}
|
|
|
|
if (local_data)
|
|
yaffs_release_temp_buffer(dev, data);
|
|
|
|
if (tags && ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
|
|
tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
|
|
dev->n_ecc_unfixed++;
|
|
}
|
|
|
|
if (tags && ecc_result == -YAFFS_ECC_RESULT_FIXED) {
|
|
if (tags->ecc_result <= YAFFS_ECC_RESULT_NO_ERROR)
|
|
tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
|
|
dev->n_ecc_fixed++;
|
|
}
|
|
|
|
if (ecc_result < YAFFS_ECC_RESULT_UNFIXED)
|
|
return YAFFS_OK;
|
|
else
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
static int yaffs_tags_marshall_query_block(struct yaffs_dev *dev, int block_no,
|
|
enum yaffs_block_state *state,
|
|
u32 *seq_number)
|
|
{
|
|
int retval;
|
|
|
|
yaffs_trace(YAFFS_TRACE_MTD, "yaffs_tags_marshall_query_block %d",
|
|
block_no);
|
|
|
|
retval = dev->drv.drv_check_bad_fn(dev, block_no);
|
|
|
|
if (retval== YAFFS_FAIL) {
|
|
yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
|
|
|
|
*state = YAFFS_BLOCK_STATE_DEAD;
|
|
*seq_number = 0;
|
|
} else {
|
|
struct yaffs_ext_tags t;
|
|
|
|
yaffs_tags_marshall_read(dev,
|
|
block_no * dev->param.chunks_per_block,
|
|
NULL, &t);
|
|
|
|
if (t.chunk_used) {
|
|
*seq_number = t.seq_number;
|
|
*state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
|
|
} else {
|
|
*seq_number = 0;
|
|
*state = YAFFS_BLOCK_STATE_EMPTY;
|
|
}
|
|
}
|
|
|
|
yaffs_trace(YAFFS_TRACE_MTD,
|
|
"block query returns seq %d state %d",
|
|
*seq_number, *state);
|
|
|
|
if (retval == 0)
|
|
return YAFFS_OK;
|
|
else
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
static int yaffs_tags_marshall_mark_bad(struct yaffs_dev *dev, int block_no)
|
|
{
|
|
return dev->drv.drv_mark_bad_fn(dev, block_no);
|
|
|
|
}
|
|
|
|
|
|
void yaffs_tags_marshall_install(struct yaffs_dev *dev)
|
|
{
|
|
if (!dev->param.is_yaffs2)
|
|
return;
|
|
|
|
if (!dev->tagger.write_chunk_tags_fn)
|
|
dev->tagger.write_chunk_tags_fn = yaffs_tags_marshall_write;
|
|
|
|
if (!dev->tagger.read_chunk_tags_fn)
|
|
dev->tagger.read_chunk_tags_fn = yaffs_tags_marshall_read;
|
|
|
|
if (!dev->tagger.query_block_fn)
|
|
dev->tagger.query_block_fn = yaffs_tags_marshall_query_block;
|
|
|
|
if (!dev->tagger.mark_bad_fn)
|
|
dev->tagger.mark_bad_fn = yaffs_tags_marshall_mark_bad;
|
|
|
|
}
|