int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
int nand_chunk,
const u8 *buffer, struct yaffs_ext_tags *tags)
{
int result;
int flash_chunk = nand_chunk - dev->chunk_offset;
dev->n_page_writes++;
if (tags) {
tags->seq_number = dev->seq_number;
tags->chunk_used = 1;
yaffs_trace(YAFFS_TRACE_WRITE,
"Writing chunk %d tags %d %d",
nand_chunk, tags->obj_id, tags->chunk_id);
} else {
yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
BUG();
return YAFFS_FAIL;
}
if (dev->param.write_chunk_tags_fn)
result = dev->param.write_chunk_tags_fn(dev, flash_chunk,
buffer, tags);
else
result = yaffs_tags_compat_wr(dev, flash_chunk, buffer, tags);
yaffs_summary_add(dev, tags, nand_chunk);
return result;
}
int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
int nand_chunk,
const u8 * buffer, struct yaffs_ext_tags *tags)
{
dev->n_page_writes++;
nand_chunk -= dev->chunk_offset;
if (tags) {
tags->seq_number = dev->seq_number;
tags->chunk_used = 1;
if (!yaffs_validate_tags(tags)) {
yaffs_trace(YAFFS_TRACE_ERROR, "Writing uninitialised tags");
YBUG();
}
yaffs_trace(YAFFS_TRACE_WRITE,
"Writing chunk %d tags %d %d",
nand_chunk, tags->obj_id, tags->chunk_id);
} else {
yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
YBUG();
}
if (dev->param.write_chunk_tags_fn)
return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer,
tags);
else
return yaffs_tags_compat_wr(dev, nand_chunk, buffer, tags);
}
int yaffs_verify_mtd(struct mtd_info *mtd, int yaffs_version, int inband_tags,
int tags_9bytes)
{
if (yaffs_version == 2) {
if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
!inband_tags) {
yaffs_trace(YAFFS_TRACE_ALWAYS,
"MTD device does not have the right page sizes"
);
return -1;
}
} else {
if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
yaffs_trace(YAFFS_TRACE_ALWAYS,
"MTD device does not support have the right page sizes"
);
return -1;
}
if (tags_9bytes && mtd->oobavail < 9) {
yaffs_trace(YAFFS_TRACE_ALWAYS,
"MTD device does not support 9-byte tags");
return -1;
}
}
return 0;
}
static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev)
{
int i;
int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"allocating checkpt block: erased %d reserved %d avail %d next %d ",
dev->n_erased_blocks, dev->param.n_reserved_blocks,
blocks_avail, dev->checkpt_next_block);
if (dev->checkpt_next_block >= 0 &&
dev->checkpt_next_block <= dev->internal_end_block &&
blocks_avail > 0) {
for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
i++) {
struct yaffs_block_info *bi =
yaffs_get_block_info(dev, i);
if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
dev->checkpt_next_block = i + 1;
dev->checkpt_cur_block = i;
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"allocating checkpt block %d", i);
return;
}
}
}
yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks");
dev->checkpt_next_block = -1;
dev->checkpt_cur_block = -1;
}
static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes)
{
struct yaffs_allocator *allocator =
(struct yaffs_allocator *)dev->allocator;
int i;
struct yaffs_tnode *new_tnodes;
u8 *mem;
struct yaffs_tnode *curr;
struct yaffs_tnode *next;
struct yaffs_tnode_list *tnl;
if (!allocator) {
YBUG();
return YAFFS_FAIL;
}
if (n_tnodes < 1)
return YAFFS_OK;
new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS);
mem = (u8 *) new_tnodes;
if (!new_tnodes) {
yaffs_trace(YAFFS_TRACE_ERROR,
"yaffs: Could not allocate Tnodes");
return YAFFS_FAIL;
}
for (i = 0; i < n_tnodes - 1; i++) {
curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size];
next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size];
curr->internal[0] = next;
}
curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size];
curr->internal[0] = allocator->free_tnodes;
allocator->free_tnodes = (struct yaffs_tnode *)mem;
allocator->n_free_tnodes += n_tnodes;
allocator->n_tnodes_created += n_tnodes;
tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS);
if (!tnl) {
yaffs_trace(YAFFS_TRACE_ERROR,
"Could not add tnodes to management list");
return YAFFS_FAIL;
} else {
tnl->tnodes = new_tnodes;
tnl->next = allocator->alloc_tnode_list;
allocator->alloc_tnode_list = tnl;
}
yaffs_trace(YAFFS_TRACE_ALLOCATE,"Tnodes added");
return YAFFS_OK;
}
static void yaffs2_checkpt_find_block(struct yaffs_dev *dev)
{
int i;
struct yaffs_ext_tags tags;
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"find next checkpt block: start: blocks %d next %d",
dev->blocks_in_checkpt, dev->checkpt_next_block);
if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
i++) {
int chunk = i * dev->param.chunks_per_block;
enum yaffs_block_state state;
u32 seq;
dev->param.query_block_fn(dev,
apply_block_offset(dev, i),
&state, &seq);
if (state == YAFFS_BLOCK_STATE_DEAD)
continue;
dev->param.read_chunk_tags_fn(dev,
apply_chunk_offset(dev, chunk),
NULL, &tags);
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"find next checkpt block: search: block %d state %d oid %d seq %d eccr %d",
i, (int) state,
tags.obj_id, tags.seq_number,
tags.ecc_result);
if (tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
continue;
/* Right kind of block */
dev->checkpt_next_block = tags.obj_id;
dev->checkpt_cur_block = i;
dev->checkpt_block_list[dev->blocks_in_checkpt] = i;
dev->blocks_in_checkpt++;
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"found checkpt block %d", i);
return;
}
yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks");
dev->checkpt_next_block = -1;
dev->checkpt_cur_block = -1;
}
static void yaffs_dump_packed_tags2_tags_only(const struct
yaffs_packed_tags2_tags_only *ptt)
{
yaffs_trace(YAFFS_TRACE_MTD,
"packed tags obj %d chunk %d byte %d seq %d",
ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number);
}
static int yflash2_EraseBlock(struct yaffs_dev *dev, int block_no)
{
int i;
int h;
CheckInit();
if(block_no < 0 || block_no >= filedisk.nBlocks)
{
yaffs_trace(YAFFS_TRACE_ALWAYS,"Attempt to erase non-existant block %d",block_no);
return YAFFS_FAIL;
}
else
{
u8 pg[PAGE_SIZE];
int syz = PAGE_SIZE;
int pos;
memset(pg,0xff,syz);
h = filedisk.handle[(block_no / ( BLOCKS_PER_HANDLE))];
lseek(h,((block_no % BLOCKS_PER_HANDLE) * dev->param.chunks_per_block) * PAGE_SIZE,SEEK_SET);
for(i = 0; i < dev->param.chunks_per_block; i++)
{
write(h,pg,PAGE_SIZE);
}
pos = lseek(h, 0,SEEK_CUR);
return YAFFS_OK;
}
}
static int yaffs_mtd_write(struct yaffs_dev *dev, int nand_chunk,
const u8 *data, int data_len,
const u8 *oob, int oob_len)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
loff_t addr;
struct mtd_oob_ops ops;
int retval;
addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
memset(&ops, 0, sizeof(ops));
ops.mode = MTD_OPS_AUTO_OOB;
ops.len = (data) ? data_len : 0;
ops.ooblen = oob_len;
ops.datbuf = (u8 *)data;
ops.oobbuf = (u8 *)oob;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 3, 0))
retval = mtd_write_oob(mtd, addr, &ops);
#else
retval = mtd->write_oob(mtd, addr, &ops);
#endif
if (retval) {
yaffs_trace(YAFFS_TRACE_MTD,
"write_oob failed, chunk %d, mtd error %d",
nand_chunk, retval);
}
return retval ? YAFFS_FAIL : YAFFS_OK;
}
static int yaffs_mtd_read(struct yaffs_dev *dev, int nand_chunk,
u8 *data, int data_len,
u8 *oob, int oob_len,
enum yaffs_ecc_result *ecc_result)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
loff_t addr;
struct mtd_oob_ops ops;
int retval;
addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
memset(&ops, 0, sizeof(ops));
ops.mode = MTD_OPS_AUTO_OOB;
ops.len = (data) ? data_len : 0;
ops.ooblen = oob_len;
ops.datbuf = data;
ops.oobbuf = oob;
#if (MTD_VERSION_CODE < MTD_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",
nand_chunk, retval);
switch (retval) {
case 0:
/* no error */
if(ecc_result)
*ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
break;
case -EUCLEAN:
/* MTD's ECC fixed the data */
if(ecc_result)
*ecc_result = YAFFS_ECC_RESULT_FIXED;
dev->n_ecc_fixed++;
break;
case -EBADMSG:
default:
/* MTD's ECC could not fix the data */
dev->n_ecc_unfixed++;
if(ecc_result)
*ecc_result = YAFFS_ECC_RESULT_UNFIXED;
return YAFFS_FAIL;
}
return YAFFS_OK;
}
int nandmtd2_query_block(struct yaffs_dev *dev, int block_no,
enum yaffs_block_state *state, u32 * seq_number)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
int retval;
yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_query_block %d", block_no);
retval =
mtd_block_isbad(mtd,
block_no * dev->param.chunks_per_block *
dev->param.total_bytes_per_chunk);
if (retval) {
yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
*state = YAFFS_BLOCK_STATE_DEAD;
*seq_number = 0;
} else {
struct yaffs_ext_tags t;
nandmtd2_read_chunk_tags(dev, block_no *
dev->param.chunks_per_block, NULL, &t);
if (t.chunk_used) {
*seq_number = t.seq_number;
*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
} else {
*seq_number = 0;
*state = YAFFS_BLOCK_STATE_EMPTY;
}
/*if ecc unfixed, set the block empty. This block will be erased when allocate.*/
if(t.ecc_result == YAFFS_ECC_RESULT_UNFIXED)
{
printk("yaffsdebug : unfixed ecc error when scan block, seqnum:0x%x\n",t.seq_number);
*seq_number = 0;
*state = YAFFS_BLOCK_STATE_EMPTY;
}
}
yaffs_trace(YAFFS_TRACE_MTD,
"block is bad seq %d state %d", *seq_number, *state);
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
static void yaffs_dump_tags2(const struct yaffs_ext_tags *t)
{
yaffs_trace(YAFFS_TRACE_MTD,
"ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d",
t->ecc_result, t->block_bad, t->chunk_used, t->obj_id,
t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number,
t->seq_number);
}
static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev)
{
int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"checkpt blocks_avail = %d", blocks_avail);
return (blocks_avail <= 0) ? 0 : 1;
}
static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev)
{
int chunk;
int realigned_chunk;
struct yaffs_ext_tags tags;
if (dev->checkpt_cur_block < 0) {
yaffs2_checkpt_find_erased_block(dev);
dev->checkpt_cur_chunk = 0;
}
if (dev->checkpt_cur_block < 0)
return 0;
tags.is_deleted = 0;
tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */
tags.chunk_id = dev->checkpt_page_seq + 1;
tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA;
tags.n_bytes = dev->data_bytes_per_chunk;
if (dev->checkpt_cur_chunk == 0) {
/* First chunk we write for the block? Set block state to
checkpoint */
struct yaffs_block_info *bi =
yaffs_get_block_info(dev, dev->checkpt_cur_block);
bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
dev->blocks_in_checkpt++;
}
chunk =
dev->checkpt_cur_block * dev->param.chunks_per_block +
dev->checkpt_cur_chunk;
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"checkpoint wite buffer nand %d(%d:%d) objid %d chId %d",
chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk,
tags.obj_id, tags.chunk_id);
realigned_chunk = chunk - dev->chunk_offset;
dev->n_page_writes++;
dev->param.write_chunk_tags_fn(dev, realigned_chunk,
dev->checkpt_buffer, &tags);
dev->checkpt_page_seq++;
dev->checkpt_cur_chunk++;
if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) {
dev->checkpt_cur_chunk = 0;
dev->checkpt_cur_block = -1;
}
memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
yaffs2_checkpt_init_chunk_hdr(dev);
return 1;
}
int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev)
{
/* Erase the checkpoint data */
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"checkpoint invalidate of %d blocks",
dev->blocks_in_checkpt);
return yaffs_checkpt_erase(dev);
}
void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk)
{
if (blk < dev->internal_start_block || blk > dev->internal_end_block ||
chunk < 0 || chunk >= dev->param.chunks_per_block) {
yaffs_trace(YAFFS_TRACE_ERROR,
"Chunk Id (%d:%d) invalid",
blk, chunk);
BUG();
}
}
/* 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 packed_tags1 form
* - Compute mini-ECC for packed_tags1
* - Write data and packed tags to NAND.
*
* Note: Due to the use of the packed_tags1 meta-data which does not include
* a full sequence number (as found in the larger packed_tags2 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_write_chunk_tags(struct yaffs_dev *dev,
int nand_chunk, const u8 *data,
const struct yaffs_ext_tags *etags)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
int chunk_bytes = dev->data_bytes_per_chunk;
loff_t addr = ((loff_t) nand_chunk) * chunk_bytes;
struct mtd_oob_ops ops;
struct yaffs_packed_tags1 pt1;
int retval;
/* we assume that packed_tags1 and struct yaffs_tags are compatible */
compile_time_assertion(sizeof(struct yaffs_packed_tags1) == 12);
compile_time_assertion(sizeof(struct yaffs_tags) == 8);
yaffs_pack_tags1(&pt1, etags);
yaffs_calc_tags_ecc((struct yaffs_tags *)&pt1);
/* When deleting a chunk, the upper layer provides only skeletal
* etags, one with is_deleted 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.
*/
if(dev->param.tags_9bytes) {
((u8 *) &pt1)[8] = 0xff;
if (etags->is_deleted) {
memset(&pt1, 0xff, 8);
/* zero page_status byte to indicate deleted */
((u8 *) &pt1)[8] = 0;
}
} else {
if (etags->is_deleted) {
memset(&pt1, 0xff, 8);
/* clear delete status bit to indicate deleted */
pt1.deleted = 0;
}
}
memset(&ops, 0, sizeof(ops));
ops.mode = MTD_OPS_AUTO_OOB;
ops.len = (data) ? chunk_bytes : 0;
ops.ooblen = dev->param.tags_9bytes ? 9 : 8;
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",
nand_chunk, retval);
}
return retval ? YAFFS_FAIL : YAFFS_OK;
}
/* 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;
}
/* Mark a block bad.
*
* This is a persistant state.
* Use of this function should be rare.
*
* Returns YAFFS_OK or YAFFS_FAIL.
*/
int nandmtd1_mark_block_bad(struct yaffs_dev *dev, int block_no)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
int blocksize = dev->param.chunks_per_block * dev->data_bytes_per_chunk;
int retval;
yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", block_no);
retval = mtd->block_markbad(mtd, (loff_t) blocksize * block_no);
return (retval) ? YAFFS_FAIL : YAFFS_OK;
}
static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk)
{
if (blk < dev->internal_start_block || blk > dev->internal_end_block) {
yaffs_trace(YAFFS_TRACE_ERROR,
"BlockBits block %d is not valid",
blk);
BUG();
}
return dev->chunk_bits +
(dev->chunk_bit_stride * (blk - dev->internal_start_block));
}
static int yaffs_mtd_check_bad(struct yaffs_dev *dev, int block_no)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
int blocksize = dev->param.chunks_per_block * dev->param.total_bytes_per_chunk;
int retval;
yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "checking block %d bad", block_no);
retval = mtd_block_isbad(mtd, (loff_t) blocksize * block_no);
return (retval) ? YAFFS_FAIL : 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\n", blockNo);
retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
return (retval) ? YAFFS_FAIL : YAFFS_OK;
}
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;
}
/* NB For use with inband tags....
* We assume that the data buffer is of size total_bytes_per_chunk so that we can also
* use it to load the tags.
*/
int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
const u8 * data,
const struct yaffs_ext_tags *tags)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
struct mtd_oob_ops ops;
int retval = 0;
loff_t addr;
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,
"nandmtd2_write_chunk_tags chunk %d data %p tags %p",
nand_chunk, data, tags);
addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
/* 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);
}
ops.mode = MTD_OOB_AUTO;
ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size;
ops.len = dev->param.total_bytes_per_chunk;
ops.ooboffs = 0;
ops.datbuf = (u8 *) data;
ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr;
retval = mtd->write_oob(mtd, addr, &ops);
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj)
{
struct yaffs_allocator *allocator = dev->allocator;
int i;
struct yaffs_obj *new_objs;
struct yaffs_obj_list *list;
if (!allocator) {
YBUG();
return YAFFS_FAIL;
}
if (n_obj < 1)
return YAFFS_OK;
new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS);
list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS);
if (!new_objs || !list) {
if (new_objs) {
kfree(new_objs);
new_objs = NULL;
}
if (list) {
kfree(list);
list = NULL;
}
yaffs_trace(YAFFS_TRACE_ALLOCATE,
"Could not allocate more objects");
return YAFFS_FAIL;
}
for (i = 0; i < n_obj - 1; i++) {
new_objs[i].siblings.next =
(struct list_head *)(&new_objs[i + 1]);
}
new_objs[n_obj - 1].siblings.next = (void *)allocator->free_objs;
allocator->free_objs = new_objs;
allocator->n_free_objects += n_obj;
allocator->n_obj_created += n_obj;
list->objects = new_objs;
list->next = allocator->allocated_obj_list;
allocator->allocated_obj_list = list;
return YAFFS_OK;
}
static void yaffs2_checkpt_find_block(struct yaffs_dev *dev)
{
int i;
struct yaffs_ext_tags tags;
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"find next checkpt block: start: blocks %d next %d",
dev->blocks_in_checkpt, dev->checkpt_next_block);
if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
i++) {
int chunk = i * dev->param.chunks_per_block;
int realigned_chunk = chunk - dev->chunk_offset;
dev->param.read_chunk_tags_fn(dev, realigned_chunk,
NULL, &tags);
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"find next checkpt block: search: block %d oid %d seq %d eccr %d",
i, tags.obj_id, tags.seq_number,
tags.ecc_result);
if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
/* Right kind of block */
dev->checkpt_next_block = tags.obj_id;
dev->checkpt_cur_block = i;
dev->checkpt_block_list[dev->
blocks_in_checkpt] = i;
dev->blocks_in_checkpt++;
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"found checkpt block %d", i);
return;
}
}
yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks");
dev->checkpt_next_block = -1;
dev->checkpt_cur_block = -1;
}
struct mtd_info * yaffs_get_mtd_device(dev_t sdev)
{
struct mtd_info *mtd;
mtd = yaffs_get_mtd_device(sdev);
/* Check it's an mtd device..... */
if (MAJOR(sdev) != MTD_BLOCK_MAJOR)
return NULL; /* This isn't an mtd device */
/* Check it's NAND */
if (mtd->type != MTD_NANDFLASH) {
yaffs_trace(YAFFS_TRACE_ALWAYS,
"yaffs: MTD device is not NAND it's type %d",
mtd->type);
return NULL;
}
yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd));
yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize);
yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
yaffs_trace(YAFFS_TRACE_OS, " size %u", mtd->size);
#else
yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size);
#endif
return mtd;
}
static int yaffs_wr_nand(struct yaffs_dev *dev,
int nand_chunk, const u8 * data,
struct yaffs_spare *spare)
{
if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) {
yaffs_trace(YAFFS_TRACE_ERROR,
"**>> yaffs chunk %d is not valid",
nand_chunk);
return YAFFS_FAIL;
}
return dev->param.write_chunk_fn(dev, nand_chunk, data, spare);
}
static int yaffs_mtd_write(struct yaffs_dev *dev, int nand_chunk,
const u8 *data, int data_len,
const u8 *oob, int oob_len)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
loff_t addr;
struct mtd_oob_ops ops;
int retval;
yaffs_trace(YAFFS_TRACE_MTD,
"yaffs_mtd_write(%p, %d, %p, %d, %p, %d)\n",
dev, nand_chunk, data, data_len, oob, oob_len);
if (!data || !data_len) {
data = NULL;
data_len = 0;
}
if (!oob || !oob_len) {
oob = NULL;
oob_len = 0;
}
addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
memset(&ops, 0, sizeof(ops));
ops.mode = MTD_OPS_AUTO_OOB;
ops.len = (data) ? data_len : 0;
ops.ooblen = oob_len;
ops.datbuf = (u8 *)data;
ops.oobbuf = (u8 *)oob;
retval = mtd_write_oob(mtd, addr, &ops);
if (retval) {
yaffs_trace(YAFFS_TRACE_MTD,
"write_oob failed, chunk %d, mtd error %d",
nand_chunk, retval);
}
return retval ? YAFFS_FAIL : YAFFS_OK;
}
int nandmtd2_query_block(struct yaffs_dev *dev, int block_no,
enum yaffs_block_state *state, u32 *seq_number)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
int retval;
yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_query_block %d", block_no);
retval =
mtd->block_isbad(mtd,
((loff_t)block_no) * dev->param.chunks_per_block *
dev->param.total_bytes_per_chunk);
if (retval) {
yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
*state = YAFFS_BLOCK_STATE_DEAD;
*seq_number = 0;
} else {
struct yaffs_ext_tags t;
nandmtd2_read_chunk_tags(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 is bad seq %d state %d",
*seq_number, *state);
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
