From 9223a456da8ed357bf7e0b128c853e2c8bd54614 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 23 May 2006 17:21:03 +0200 Subject: [MTD] Remove read/write _ecc variants MTD clients are agnostic of FLASH which needs ECC suppport. Remove the functions and fixup the callers. Signed-off-by: Thomas Gleixner --- drivers/mtd/nftlmount.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'drivers/mtd/nftlmount.c') diff --git a/drivers/mtd/nftlmount.c b/drivers/mtd/nftlmount.c index 3b104ebb219a..90e5e7e97fdc 100644 --- a/drivers/mtd/nftlmount.c +++ b/drivers/mtd/nftlmount.c @@ -268,18 +268,22 @@ static int memcmpb(void *a, int c, int n) static int check_free_sectors(struct NFTLrecord *nftl, unsigned int address, int len, int check_oob) { - int i; - size_t retlen; u8 buf[SECTORSIZE + nftl->mbd.mtd->oobsize]; + struct mtd_info *mtd = nftl->mbd.mtd; + size_t retlen; + int i; for (i = 0; i < len; i += SECTORSIZE) { - if (MTD_READECC(nftl->mbd.mtd, address, SECTORSIZE, &retlen, buf, &buf[SECTORSIZE], &nftl->oobinfo) < 0) + if (mtd->read(mtd, address, SECTORSIZE, &retlen, buf)) return -1; if (memcmpb(buf, 0xff, SECTORSIZE) != 0) return -1; if (check_oob) { - if (memcmpb(buf + SECTORSIZE, 0xff, nftl->mbd.mtd->oobsize) != 0) + if(mtd->read_oob(mtd, address, mtd->oobsize, + &retlen, &buf[SECTORSIZE]) < 0) + return -1; + if (memcmpb(buf + SECTORSIZE, 0xff, mtd->oobsize) != 0) return -1; } address += SECTORSIZE; -- cgit v1.2.2 From f4a43cfcecfcaeeaa40a9dbc1d1378298c22446e Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sun, 28 May 2006 11:01:53 +0200 Subject: [MTD] Remove silly MTD_WRITE/READ macros Most of those macros are unused and the used ones just obfuscate the code. Remove them and fixup all users. Signed-off-by: Thomas Gleixner --- drivers/mtd/nftlmount.c | 74 +++++++++++++++++++++++++++++-------------------- 1 file changed, 44 insertions(+), 30 deletions(-) (limited to 'drivers/mtd/nftlmount.c') diff --git a/drivers/mtd/nftlmount.c b/drivers/mtd/nftlmount.c index 90e5e7e97fdc..521b07cd2326 100644 --- a/drivers/mtd/nftlmount.c +++ b/drivers/mtd/nftlmount.c @@ -45,6 +45,7 @@ static int find_boot_record(struct NFTLrecord *nftl) size_t retlen; u8 buf[SECTORSIZE]; struct NFTLMediaHeader *mh = &nftl->MediaHdr; + struct mtd_info *mtd = nftl->mbd.mtd; unsigned int i; /* Assume logical EraseSize == physical erasesize for starting the scan. @@ -65,7 +66,8 @@ static int find_boot_record(struct NFTLrecord *nftl) /* Check for ANAND header first. Then can whinge if it's found but later checks fail */ - ret = MTD_READ(nftl->mbd.mtd, block * nftl->EraseSize, SECTORSIZE, &retlen, buf); + ret = mtd->read(mtd, block * nftl->EraseSize, SECTORSIZE, + &retlen, buf); /* We ignore ret in case the ECC of the MediaHeader is invalid (which is apparently acceptable) */ if (retlen != SECTORSIZE) { @@ -90,8 +92,9 @@ static int find_boot_record(struct NFTLrecord *nftl) } /* To be safer with BIOS, also use erase mark as discriminant */ - if ((ret = MTD_READOOB(nftl->mbd.mtd, block * nftl->EraseSize + SECTORSIZE + 8, - 8, &retlen, (char *)&h1) < 0)) { + if ((ret = mtd->read_oob(mtd, block * nftl->EraseSize + + SECTORSIZE + 8, 8, &retlen, + (char *)&h1) < 0)) { printk(KERN_WARNING "ANAND header found at 0x%x in mtd%d, but OOB data read failed (err %d)\n", block * nftl->EraseSize, nftl->mbd.mtd->index, ret); continue; @@ -109,8 +112,8 @@ static int find_boot_record(struct NFTLrecord *nftl) } /* Finally reread to check ECC */ - if ((ret = MTD_READECC(nftl->mbd.mtd, block * nftl->EraseSize, SECTORSIZE, - &retlen, buf, (char *)&oob, NULL) < 0)) { + if ((ret = mtd->read(mtd, block * nftl->EraseSize, SECTORSIZE, + &retlen, buf) < 0)) { printk(KERN_NOTICE "ANAND header found at 0x%x in mtd%d, but ECC read failed (err %d)\n", block * nftl->EraseSize, nftl->mbd.mtd->index, ret); continue; @@ -228,9 +231,9 @@ device is already correct. The new DiskOnChip driver already scanned the bad block table. Just query it. if ((i & (SECTORSIZE - 1)) == 0) { /* read one sector for every SECTORSIZE of blocks */ - if ((ret = MTD_READECC(nftl->mbd.mtd, block * nftl->EraseSize + - i + SECTORSIZE, SECTORSIZE, &retlen, buf, - (char *)&oob, NULL)) < 0) { + if ((ret = mtd->read(nftl->mbd.mtd, block * nftl->EraseSize + + i + SECTORSIZE, SECTORSIZE, &retlen, + buf)) < 0) { printk(KERN_NOTICE "Read of bad sector table failed (err %d)\n", ret); kfree(nftl->ReplUnitTable); @@ -305,10 +308,11 @@ int NFTL_formatblock(struct NFTLrecord *nftl, int block) unsigned int nb_erases, erase_mark; struct nftl_uci1 uci; struct erase_info *instr = &nftl->instr; + struct mtd_info *mtd = nftl->mbd.mtd; /* Read the Unit Control Information #1 for Wear-Leveling */ - if (MTD_READOOB(nftl->mbd.mtd, block * nftl->EraseSize + SECTORSIZE + 8, - 8, &retlen, (char *)&uci) < 0) + if (mtd->read_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, + 8, &retlen, (char *)&uci) < 0) goto default_uci1; erase_mark = le16_to_cpu ((uci.EraseMark | uci.EraseMark1)); @@ -325,7 +329,7 @@ int NFTL_formatblock(struct NFTLrecord *nftl, int block) instr->mtd = nftl->mbd.mtd; instr->addr = block * nftl->EraseSize; instr->len = nftl->EraseSize; - MTD_ERASE(nftl->mbd.mtd, instr); + mtd->erase(mtd, instr); if (instr->state == MTD_ERASE_FAILED) { printk("Error while formatting block %d\n", block); @@ -347,8 +351,8 @@ int NFTL_formatblock(struct NFTLrecord *nftl, int block) goto fail; uci.WearInfo = le32_to_cpu(nb_erases); - if (MTD_WRITEOOB(nftl->mbd.mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, - &retlen, (char *)&uci) < 0) + if (mtd->write_oob(mtd, block * nftl->EraseSize + SECTORSIZE + + 8, 8, &retlen, (char *)&uci) < 0) goto fail; return 0; fail: @@ -369,6 +373,7 @@ fail: * case. */ static void check_sectors_in_chain(struct NFTLrecord *nftl, unsigned int first_block) { + struct mtd_info *mtd = nftl->mbd.mtd; unsigned int block, i, status; struct nftl_bci bci; int sectors_per_block; @@ -378,8 +383,9 @@ static void check_sectors_in_chain(struct NFTLrecord *nftl, unsigned int first_b block = first_block; for (;;) { for (i = 0; i < sectors_per_block; i++) { - if (MTD_READOOB(nftl->mbd.mtd, block * nftl->EraseSize + i * SECTORSIZE, - 8, &retlen, (char *)&bci) < 0) + if (mtd->read_oob(mtd, + block * nftl->EraseSize + i * SECTORSIZE, + 8, &retlen, (char *)&bci) < 0) status = SECTOR_IGNORE; else status = bci.Status | bci.Status1; @@ -398,9 +404,10 @@ static void check_sectors_in_chain(struct NFTLrecord *nftl, unsigned int first_b /* sector not free actually : mark it as SECTOR_IGNORE */ bci.Status = SECTOR_IGNORE; bci.Status1 = SECTOR_IGNORE; - MTD_WRITEOOB(nftl->mbd.mtd, - block * nftl->EraseSize + i * SECTORSIZE, - 8, &retlen, (char *)&bci); + mtd->write_oob(mtd, block * + nftl->EraseSize + + i * SECTORSIZE, 8, + &retlen, (char *)&bci); } break; default: @@ -485,13 +492,14 @@ static void format_chain(struct NFTLrecord *nftl, unsigned int first_block) * 1. */ static int check_and_mark_free_block(struct NFTLrecord *nftl, int block) { + struct mtd_info *mtd = nftl->mbd.mtd; struct nftl_uci1 h1; unsigned int erase_mark; size_t retlen; /* check erase mark. */ - if (MTD_READOOB(nftl->mbd.mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, - &retlen, (char *)&h1) < 0) + if (mtd->read_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, + &retlen, (char *)&h1) < 0) return -1; erase_mark = le16_to_cpu ((h1.EraseMark | h1.EraseMark1)); @@ -505,8 +513,9 @@ static int check_and_mark_free_block(struct NFTLrecord *nftl, int block) h1.EraseMark = cpu_to_le16(ERASE_MARK); h1.EraseMark1 = cpu_to_le16(ERASE_MARK); h1.WearInfo = cpu_to_le32(0); - if (MTD_WRITEOOB(nftl->mbd.mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, - &retlen, (char *)&h1) < 0) + if (mtd->write_oob(mtd, + block * nftl->EraseSize + SECTORSIZE + 8, 8, + &retlen, (char *)&h1) < 0) return -1; } else { #if 0 @@ -517,8 +526,8 @@ static int check_and_mark_free_block(struct NFTLrecord *nftl, int block) SECTORSIZE, 0) != 0) return -1; - if (MTD_READOOB(nftl->mbd.mtd, block * nftl->EraseSize + i, - 16, &retlen, buf) < 0) + if (mtd->read_oob(mtd, block * nftl->EraseSize + i, + 16, &retlen, buf) < 0) return -1; if (i == SECTORSIZE) { /* skip erase mark */ @@ -544,11 +553,12 @@ static int check_and_mark_free_block(struct NFTLrecord *nftl, int block) */ static int get_fold_mark(struct NFTLrecord *nftl, unsigned int block) { + struct mtd_info *mtd = nftl->mbd.mtd; struct nftl_uci2 uci; size_t retlen; - if (MTD_READOOB(nftl->mbd.mtd, block * nftl->EraseSize + 2 * SECTORSIZE + 8, - 8, &retlen, (char *)&uci) < 0) + if (mtd->read_oob(mtd, block * nftl->EraseSize + 2 * SECTORSIZE + 8, + 8, &retlen, (char *)&uci) < 0) return 0; return le16_to_cpu((uci.FoldMark | uci.FoldMark1)); @@ -562,6 +572,7 @@ int NFTL_mount(struct NFTLrecord *s) int chain_length, do_format_chain; struct nftl_uci0 h0; struct nftl_uci1 h1; + struct mtd_info *mtd = s->mbd.mtd; size_t retlen; /* search for NFTL MediaHeader and Spare NFTL Media Header */ @@ -586,10 +597,13 @@ int NFTL_mount(struct NFTLrecord *s) for (;;) { /* read the block header. If error, we format the chain */ - if (MTD_READOOB(s->mbd.mtd, block * s->EraseSize + 8, 8, - &retlen, (char *)&h0) < 0 || - MTD_READOOB(s->mbd.mtd, block * s->EraseSize + SECTORSIZE + 8, 8, - &retlen, (char *)&h1) < 0) { + if (mtd->read_oob(mtd, + block * s->EraseSize + 8, 8, + &retlen, (char *)&h0) < 0 || + mtd->read_oob(mtd, + block * s->EraseSize + + SECTORSIZE + 8, 8, + &retlen, (char *)&h1) < 0) { s->ReplUnitTable[block] = BLOCK_NIL; do_format_chain = 1; break; -- cgit v1.2.2 From 8593fbc68b0df1168995de76d1af38eb62fd6b62 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 29 May 2006 03:26:58 +0200 Subject: [MTD] Rework the out of band handling completely Hopefully the last iteration on this! The handling of out of band data on NAND was accompanied by tons of fruitless discussions and halfarsed patches to make it work for a particular problem. Sufficiently annoyed by I all those "I know it better" mails and the resonable amount of discarded "it solves my problem" patches, I finally decided to go for the big rework. After removing the _ecc variants of mtd read/write functions the solution to satisfy the various requirements was to refactor the read/write _oob functions in mtd. The major change is that read/write_oob now takes a pointer to an operation descriptor structure "struct mtd_oob_ops".instead of having a function with at least seven arguments. read/write_oob which should probably renamed to a more descriptive name, can do the following tasks: - read/write out of band data - read/write data content and out of band data - read/write raw data content and out of band data (ecc disabled) struct mtd_oob_ops has a mode field, which determines the oob handling mode. Aside of the MTD_OOB_RAW mode, which is intended to be especially for diagnostic purposes and some internal functions e.g. bad block table creation, the other two modes are for mtd clients: MTD_OOB_PLACE puts/gets the given oob data exactly to/from the place which is described by the ooboffs and ooblen fields of the mtd_oob_ops strcuture. It's up to the caller to make sure that the byte positions are not used by the ECC placement algorithms. MTD_OOB_AUTO puts/gets the given oob data automaticaly to/from the places in the out of band area which are described by the oobfree tuples in the ecclayout data structre which is associated to the devicee. The decision whether data plus oob or oob only handling is done depends on the setting of the datbuf member of the data structure. When datbuf == NULL then the internal read/write_oob functions are selected, otherwise the read/write data routines are invoked. Tested on a few platforms with all variants. Please be aware of possible regressions for your particular device / application scenario Disclaimer: Any whining will be ignored from those who just contributed "hot air blurb" and never sat down to tackle the underlying problem of the mess in the NAND driver grown over time and the big chunk of work to fix up the existing users. The problem was not the holiness of the existing MTD interfaces. The problems was the lack of time to go for the big overhaul. It's easy to add more mess to the existing one, but it takes alot of effort to go for a real solution. Improvements and bugfixes are welcome! Signed-off-by: Thomas Gleixner --- drivers/mtd/nftlmount.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) (limited to 'drivers/mtd/nftlmount.c') diff --git a/drivers/mtd/nftlmount.c b/drivers/mtd/nftlmount.c index 521b07cd2326..067262ee8df0 100644 --- a/drivers/mtd/nftlmount.c +++ b/drivers/mtd/nftlmount.c @@ -33,6 +33,11 @@ char nftlmountrev[]="$Revision: 1.41 $"; +extern int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len, + size_t *retlen, uint8_t *buf); +extern int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len, + size_t *retlen, uint8_t *buf); + /* find_boot_record: Find the NFTL Media Header and its Spare copy which contains the * various device information of the NFTL partition and Bad Unit Table. Update * the ReplUnitTable[] table accroding to the Bad Unit Table. ReplUnitTable[] @@ -92,7 +97,7 @@ static int find_boot_record(struct NFTLrecord *nftl) } /* To be safer with BIOS, also use erase mark as discriminant */ - if ((ret = mtd->read_oob(mtd, block * nftl->EraseSize + + if ((ret = nftl_read_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, &retlen, (char *)&h1) < 0)) { printk(KERN_WARNING "ANAND header found at 0x%x in mtd%d, but OOB data read failed (err %d)\n", @@ -283,7 +288,7 @@ static int check_free_sectors(struct NFTLrecord *nftl, unsigned int address, int return -1; if (check_oob) { - if(mtd->read_oob(mtd, address, mtd->oobsize, + if(nftl_read_oob(mtd, address, mtd->oobsize, &retlen, &buf[SECTORSIZE]) < 0) return -1; if (memcmpb(buf + SECTORSIZE, 0xff, mtd->oobsize) != 0) @@ -311,7 +316,7 @@ int NFTL_formatblock(struct NFTLrecord *nftl, int block) struct mtd_info *mtd = nftl->mbd.mtd; /* Read the Unit Control Information #1 for Wear-Leveling */ - if (mtd->read_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, + if (nftl_read_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, &retlen, (char *)&uci) < 0) goto default_uci1; @@ -351,7 +356,7 @@ int NFTL_formatblock(struct NFTLrecord *nftl, int block) goto fail; uci.WearInfo = le32_to_cpu(nb_erases); - if (mtd->write_oob(mtd, block * nftl->EraseSize + SECTORSIZE + + if (nftl_write_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, &retlen, (char *)&uci) < 0) goto fail; return 0; @@ -383,7 +388,7 @@ static void check_sectors_in_chain(struct NFTLrecord *nftl, unsigned int first_b block = first_block; for (;;) { for (i = 0; i < sectors_per_block; i++) { - if (mtd->read_oob(mtd, + if (nftl_read_oob(mtd, block * nftl->EraseSize + i * SECTORSIZE, 8, &retlen, (char *)&bci) < 0) status = SECTOR_IGNORE; @@ -404,7 +409,7 @@ static void check_sectors_in_chain(struct NFTLrecord *nftl, unsigned int first_b /* sector not free actually : mark it as SECTOR_IGNORE */ bci.Status = SECTOR_IGNORE; bci.Status1 = SECTOR_IGNORE; - mtd->write_oob(mtd, block * + nftl_write_oob(mtd, block * nftl->EraseSize + i * SECTORSIZE, 8, &retlen, (char *)&bci); @@ -498,7 +503,7 @@ static int check_and_mark_free_block(struct NFTLrecord *nftl, int block) size_t retlen; /* check erase mark. */ - if (mtd->read_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, + if (nftl_read_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, &retlen, (char *)&h1) < 0) return -1; @@ -513,7 +518,7 @@ static int check_and_mark_free_block(struct NFTLrecord *nftl, int block) h1.EraseMark = cpu_to_le16(ERASE_MARK); h1.EraseMark1 = cpu_to_le16(ERASE_MARK); h1.WearInfo = cpu_to_le32(0); - if (mtd->write_oob(mtd, + if (nftl_write_oob(mtd, block * nftl->EraseSize + SECTORSIZE + 8, 8, &retlen, (char *)&h1) < 0) return -1; @@ -526,7 +531,7 @@ static int check_and_mark_free_block(struct NFTLrecord *nftl, int block) SECTORSIZE, 0) != 0) return -1; - if (mtd->read_oob(mtd, block * nftl->EraseSize + i, + if (nftl_read_oob(mtd, block * nftl->EraseSize + i, 16, &retlen, buf) < 0) return -1; if (i == SECTORSIZE) { @@ -557,7 +562,7 @@ static int get_fold_mark(struct NFTLrecord *nftl, unsigned int block) struct nftl_uci2 uci; size_t retlen; - if (mtd->read_oob(mtd, block * nftl->EraseSize + 2 * SECTORSIZE + 8, + if (nftl_read_oob(mtd, block * nftl->EraseSize + 2 * SECTORSIZE + 8, 8, &retlen, (char *)&uci) < 0) return 0; @@ -597,10 +602,10 @@ int NFTL_mount(struct NFTLrecord *s) for (;;) { /* read the block header. If error, we format the chain */ - if (mtd->read_oob(mtd, + if (nftl_read_oob(mtd, block * s->EraseSize + 8, 8, &retlen, (char *)&h0) < 0 || - mtd->read_oob(mtd, + nftl_read_oob(mtd, block * s->EraseSize + SECTORSIZE + 8, 8, &retlen, (char *)&h1) < 0) { -- cgit v1.2.2