From: Frieder Schrempf <[email protected]>
Currently supported bad block marker positions within the block are:
* in first page only
* in last page only
* in first or second page
Some ESMT NANDs are known to have been shipped by the manufacturer
with bad block markers in the first or last page, instead of the
first or second page.
Also the datasheets for Cypress/Spansion/AMD NANDs claim that the
first, second *and* last page needs to be checked.
Therefore we make it possible to set NAND_BBT_SCAN2NDPAGE and
NAND_BBT_SCANLASTPAGE at the same time to scan/set all three pages.
This series also contains patches for AMD/Spansion/Cypress and ESMT
chips to enable both flags at the same time.
---
Changes in v2:
==============
* Rebase on 5.0-rc1
* Add patch to move bad block marker position info to a common place and
rename/prepare existing flags
* improve/rename function nand_bbm_get_next_page() to use new flags
---
Frieder Schrempf (4):
mtd: nand: Always store info about bad block markers in chip struct
mtd: rawnand: Support bad block markers in first, second or last page
mtd: rawnand: ESMT: Also use the last page for bad block markers
mtd: rawnand: AMD: Also use the last page for bad block markers
drivers/mtd/nand/onenand/onenand_base.c | 2 +-
drivers/mtd/nand/onenand/onenand_bbt.c | 2 +-
drivers/mtd/nand/raw/internals.h | 1 +
drivers/mtd/nand/raw/nand_amd.c | 8 +++-
drivers/mtd/nand/raw/nand_base.c | 64 +++++++++++++++++--------
drivers/mtd/nand/raw/nand_bbt.c | 28 +++++------
drivers/mtd/nand/raw/nand_esmt.c | 9 +++-
drivers/mtd/nand/raw/nand_hynix.c | 4 +-
drivers/mtd/nand/raw/nand_macronix.c | 2 +-
drivers/mtd/nand/raw/nand_micron.c | 2 +-
drivers/mtd/nand/raw/nand_samsung.c | 4 +-
drivers/mtd/nand/raw/nand_toshiba.c | 2 +-
drivers/mtd/nand/raw/sh_flctl.c | 4 +-
include/linux/mtd/bbm.h | 14 +-----
include/linux/mtd/rawnand.h | 16 +++++++
15 files changed, 100 insertions(+), 62 deletions(-)
--
2.17.1
From: Frieder Schrempf <[email protected]>
It is known that some ESMT SLC NANDs have been shipped
with the factory bad block markers in the first or last page
of the block, instead of the first or second page. To be on
the safe side, let's check all three locations.
Signed-off-by: Frieder Schrempf <[email protected]>
---
drivers/mtd/nand/raw/nand_esmt.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c
index 99a8092969a7..b37e0b5af5ae 100644
--- a/drivers/mtd/nand/raw/nand_esmt.c
+++ b/drivers/mtd/nand/raw/nand_esmt.c
@@ -36,7 +36,14 @@ static void esmt_nand_decode_id(struct nand_chip *chip)
static int esmt_nand_init(struct nand_chip *chip)
{
if (nand_is_slc(chip))
- chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
+ /*
+ * It is known that some ESMT SLC NANDs have been shipped
+ * with the factory bad block markers in the first or last page
+ * of the block, instead of the first or second page. To be on
+ * the safe side, let's check all three locations.
+ */
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE |
+ NAND_BBM_LASTPAGE;
return 0;
}
--
2.17.1
From: Frieder Schrempf <[email protected]>
The information about where the manufacturer puts the bad block
markers inside the bad block and in the OOB data is stored in
different places. Let's move this information to nand_chip.options
and nand_chip.badblockpos.
As this chip-specific information is not directly related to the
bad block table (BBT) and to make them more flexible, we also rename
the flags and create separate flags for storing the BBM in the first
and the second page instead of the combined flag.
Signed-off-by: Frieder.Schrempf <[email protected]>
---
drivers/mtd/nand/onenand/onenand_base.c | 2 +-
drivers/mtd/nand/onenand/onenand_bbt.c | 2 +-
drivers/mtd/nand/raw/nand_amd.c | 2 +-
drivers/mtd/nand/raw/nand_base.c | 14 ++++++++------
drivers/mtd/nand/raw/nand_bbt.c | 5 +++--
drivers/mtd/nand/raw/nand_esmt.c | 2 +-
drivers/mtd/nand/raw/nand_hynix.c | 4 ++--
drivers/mtd/nand/raw/nand_macronix.c | 2 +-
drivers/mtd/nand/raw/nand_micron.c | 2 +-
drivers/mtd/nand/raw/nand_samsung.c | 4 ++--
drivers/mtd/nand/raw/nand_toshiba.c | 2 +-
drivers/mtd/nand/raw/sh_flctl.c | 4 ++--
include/linux/mtd/bbm.h | 14 +-------------
include/linux/mtd/rawnand.h | 16 ++++++++++++++++
14 files changed, 41 insertions(+), 34 deletions(-)
diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c
index 4ca4b194e7d7..d6701b8f031f 100644
--- a/drivers/mtd/nand/onenand/onenand_base.c
+++ b/drivers/mtd/nand/onenand/onenand_base.c
@@ -2458,7 +2458,7 @@ static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
/* We write two bytes, so we don't have to mess with 16-bit access */
- ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
+ ofs += mtd->oobsize + (this->badblockpos & ~0x01);
/* FIXME : What to do when marking SLC block in partition
* with MLC erasesize? For now, it is not advisable to
* create partitions containing both SLC and MLC regions.
diff --git a/drivers/mtd/nand/onenand/onenand_bbt.c b/drivers/mtd/nand/onenand/onenand_bbt.c
index dde20487937d..880b0abd36c8 100644
--- a/drivers/mtd/nand/onenand/onenand_bbt.c
+++ b/drivers/mtd/nand/onenand/onenand_bbt.c
@@ -191,7 +191,7 @@ static int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
return -ENOMEM;
/* Set the bad block position */
- bbm->badblockpos = ONENAND_BADBLOCK_POS;
+ this->badblockpos = NAND_BBM_POS_ONENAND;
/* Set erase shift */
bbm->bbt_erase_shift = this->erase_shift;
diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c
index 890c5b43e03c..6202cbf7ee8d 100644
--- a/drivers/mtd/nand/raw/nand_amd.c
+++ b/drivers/mtd/nand/raw/nand_amd.c
@@ -40,7 +40,7 @@ static void amd_nand_decode_id(struct nand_chip *chip)
static int amd_nand_init(struct nand_chip *chip)
{
if (nand_is_slc(chip))
- chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
return 0;
}
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index cca4b24d2ffa..9ef7b86cdc42 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -298,11 +298,12 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
int page, page_end, res;
u8 bad;
- if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
+ if (chip->options & NAND_BBM_LASTPAGE)
ofs += mtd->erasesize - mtd->writesize;
page = (int)(ofs >> chip->page_shift) & chip->pagemask;
- page_end = page + (chip->bbt_options & NAND_BBT_SCAN2NDPAGE ? 2 : 1);
+ page_end = page + (((chip->options & NAND_BBM_FIRSTPAGE) &&
+ (chip->options & NAND_BBM_SECONDPAGE)) ? 2 : 1);
for (; page < page_end; page++) {
res = chip->ecc.read_oob(chip, page);
@@ -541,7 +542,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
ops.mode = MTD_OPS_PLACE_OOB;
/* Write to first/last page(s) if necessary */
- if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
+ if (chip->options & NAND_BBM_LASTPAGE)
ofs += mtd->erasesize - mtd->writesize;
do {
res = nand_do_write_oob(chip, ofs, &ops);
@@ -550,7 +551,8 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
i++;
ofs += mtd->writesize;
- } while ((chip->bbt_options & NAND_BBT_SCAN2NDPAGE) && i < 2);
+ } while ((chip->options & NAND_BBM_FIRSTPAGE) &&
+ (chip->options & NAND_BBM_SECONDPAGE) && i < 2);
return ret;
}
@@ -4576,9 +4578,9 @@ static void nand_decode_bbm_options(struct nand_chip *chip)
/* Set the bad block position */
if (mtd->writesize > 512 || (chip->options & NAND_BUSWIDTH_16))
- chip->badblockpos = NAND_LARGE_BADBLOCK_POS;
+ chip->badblockpos = NAND_BBM_POS_LARGE;
else
- chip->badblockpos = NAND_SMALL_BADBLOCK_POS;
+ chip->badblockpos = NAND_BBM_POS_SMALL;
}
static inline bool is_full_id_nand(struct nand_flash_dev *type)
diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c
index 1b722fe9213c..c095c04d566d 100644
--- a/drivers/mtd/nand/raw/nand_bbt.c
+++ b/drivers/mtd/nand/raw/nand_bbt.c
@@ -466,7 +466,8 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
pr_info("Scanning device for bad blocks\n");
- if (bd->options & NAND_BBT_SCAN2NDPAGE)
+ if ((this->options & NAND_BBM_FIRSTPAGE) &&
+ (this->options & NAND_BBM_SECONDPAGE))
numpages = 2;
else
numpages = 1;
@@ -487,7 +488,7 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
from = (loff_t)startblock << this->bbt_erase_shift;
}
- if (this->bbt_options & NAND_BBT_SCANLASTPAGE)
+ if (this->bbt_options & NAND_BBM_LASTPAGE)
from += mtd->erasesize - (mtd->writesize * numpages);
for (i = startblock; i < numblocks; i++) {
diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c
index 96f039a83bc8..99a8092969a7 100644
--- a/drivers/mtd/nand/raw/nand_esmt.c
+++ b/drivers/mtd/nand/raw/nand_esmt.c
@@ -36,7 +36,7 @@ static void esmt_nand_decode_id(struct nand_chip *chip)
static int esmt_nand_init(struct nand_chip *chip)
{
if (nand_is_slc(chip))
- chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
return 0;
}
diff --git a/drivers/mtd/nand/raw/nand_hynix.c b/drivers/mtd/nand/raw/nand_hynix.c
index 343f477362d1..e685d70c1618 100644
--- a/drivers/mtd/nand/raw/nand_hynix.c
+++ b/drivers/mtd/nand/raw/nand_hynix.c
@@ -672,9 +672,9 @@ static int hynix_nand_init(struct nand_chip *chip)
int ret;
if (!nand_is_slc(chip))
- chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
+ chip->options |= NAND_BBM_LASTPAGE;
else
- chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
hynix = kzalloc(sizeof(*hynix), GFP_KERNEL);
if (!hynix)
diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
index 47d8cda547cf..e287e71347c5 100644
--- a/drivers/mtd/nand/raw/nand_macronix.c
+++ b/drivers/mtd/nand/raw/nand_macronix.c
@@ -62,7 +62,7 @@ static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
static int macronix_nand_init(struct nand_chip *chip)
{
if (nand_is_slc(chip))
- chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
macronix_nand_fix_broken_get_timings(chip);
diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
index b85e1c13b79e..ca80e09783c7 100644
--- a/drivers/mtd/nand/raw/nand_micron.c
+++ b/drivers/mtd/nand/raw/nand_micron.c
@@ -448,7 +448,7 @@ static int micron_nand_init(struct nand_chip *chip)
goto err_free_manuf_data;
if (mtd->writesize == 2048)
- chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
ondie = micron_supports_on_die_ecc(chip);
diff --git a/drivers/mtd/nand/raw/nand_samsung.c b/drivers/mtd/nand/raw/nand_samsung.c
index e46d4c492ad8..ace50522dd19 100644
--- a/drivers/mtd/nand/raw/nand_samsung.c
+++ b/drivers/mtd/nand/raw/nand_samsung.c
@@ -121,9 +121,9 @@ static int samsung_nand_init(struct nand_chip *chip)
chip->options |= NAND_SAMSUNG_LP_OPTIONS;
if (!nand_is_slc(chip))
- chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
+ chip->options |= NAND_BBM_LASTPAGE;
else
- chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
return 0;
}
diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
index d068163b64b3..0031e6727193 100644
--- a/drivers/mtd/nand/raw/nand_toshiba.c
+++ b/drivers/mtd/nand/raw/nand_toshiba.c
@@ -147,7 +147,7 @@ static void toshiba_nand_decode_id(struct nand_chip *chip)
static int toshiba_nand_init(struct nand_chip *chip)
{
if (nand_is_slc(chip))
- chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
/* Check that chip is BENAND and ECC mode is on-die */
if (nand_is_slc(chip) && chip->ecc.mode == NAND_ECC_ON_DIE &&
diff --git a/drivers/mtd/nand/raw/sh_flctl.c b/drivers/mtd/nand/raw/sh_flctl.c
index cf6b1be1cf9c..971d9afd55e5 100644
--- a/drivers/mtd/nand/raw/sh_flctl.c
+++ b/drivers/mtd/nand/raw/sh_flctl.c
@@ -101,14 +101,12 @@ static const struct mtd_ooblayout_ops flctl_4secc_oob_largepage_ops = {
static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
static struct nand_bbt_descr flctl_4secc_smallpage = {
- .options = NAND_BBT_SCAN2NDPAGE,
.offs = 11,
.len = 1,
.pattern = scan_ff_pattern,
};
static struct nand_bbt_descr flctl_4secc_largepage = {
- .options = NAND_BBT_SCAN2NDPAGE,
.offs = 0,
.len = 2,
.pattern = scan_ff_pattern,
@@ -1178,6 +1176,8 @@ static int flctl_probe(struct platform_device *pdev)
if (pdata->flcmncr_val & SEL_16BIT)
nand->options |= NAND_BUSWIDTH_16;
+ nand->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
+
pm_runtime_enable(&pdev->dev);
pm_runtime_resume(&pdev->dev);
diff --git a/include/linux/mtd/bbm.h b/include/linux/mtd/bbm.h
index 3102bd754d18..010bc5544c54 100644
--- a/include/linux/mtd/bbm.h
+++ b/include/linux/mtd/bbm.h
@@ -93,10 +93,7 @@ struct nand_bbt_descr {
#define NAND_BBT_WRITE 0x00002000
/* Read and write back block contents when writing bbt */
#define NAND_BBT_SAVECONTENT 0x00004000
-/* Search good / bad pattern on the first and the second page */
-#define NAND_BBT_SCAN2NDPAGE 0x00008000
-/* Search good / bad pattern on the last page of the eraseblock */
-#define NAND_BBT_SCANLASTPAGE 0x00010000
+
/*
* Use a flash based bad block table. By default, OOB identifier is saved in
* OOB area. This option is passed to the default bad block table function.
@@ -123,13 +120,6 @@ struct nand_bbt_descr {
/* The maximum number of blocks to scan for a bbt */
#define NAND_BBT_SCAN_MAXBLOCKS 4
-/*
- * Constants for oob configuration
- */
-#define NAND_SMALL_BADBLOCK_POS 5
-#define NAND_LARGE_BADBLOCK_POS 0
-#define ONENAND_BADBLOCK_POS 0
-
/*
* Bad block scanning errors
*/
@@ -140,7 +130,6 @@ struct nand_bbt_descr {
/**
* struct bbm_info - [GENERIC] Bad Block Table data structure
* @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
- * @badblockpos: [INTERN] position of the bad block marker in the oob area
* @options: options for this descriptor
* @bbt: [INTERN] bad block table pointer
* @isbad_bbt: function to determine if a block is bad
@@ -150,7 +139,6 @@ struct nand_bbt_descr {
*/
struct bbm_info {
int bbt_erase_shift;
- int badblockpos;
int options;
uint8_t *bbt;
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 33e240acdc6d..80bd3da06bec 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -169,6 +169,22 @@ enum nand_ecc_algo {
/* Macros to identify the above */
#define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
+/*
+ * There are different places where the manufacturer stores the factory bad
+ * block markers.
+ *
+ * Position within the block: Each of these pages needs to be checked for a
+ * bad block marking pattern.
+ */
+#define NAND_BBM_FIRSTPAGE 0x00008000
+#define NAND_BBM_SECONDPAGE 0x00010000
+#define NAND_BBM_LASTPAGE 0x00020000
+
+/* Position within the OOB data of the page */
+#define NAND_BBM_POS_SMALL 5
+#define NAND_BBM_POS_LARGE 0
+#define NAND_BBM_POS_ONENAND 0
+
/* Non chip related options */
/* This option skips the bbt scan during initialization. */
#define NAND_SKIP_BBTSCAN 0x00010000
--
2.17.1
From: Frieder Schrempf <[email protected]>
According to the datasheet of some Cypress SLC NANDs, the bad
block markers can be in the first, second or last page of a block.
So let's check all three locations.
Signed-off-by: Frieder Schrempf <[email protected]>
---
drivers/mtd/nand/raw/nand_amd.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c
index 6202cbf7ee8d..2ffcddff3e27 100644
--- a/drivers/mtd/nand/raw/nand_amd.c
+++ b/drivers/mtd/nand/raw/nand_amd.c
@@ -40,7 +40,13 @@ static void amd_nand_decode_id(struct nand_chip *chip)
static int amd_nand_init(struct nand_chip *chip)
{
if (nand_is_slc(chip))
- chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
+ /*
+ * According to the datasheet of some Cypress SLC NANDs,
+ * the bad block markers can be in the first, second or last
+ * page of a block. So let's check all three locations.
+ */
+ chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE |
+ NAND_BBM_LASTPAGE;
return 0;
}
--
2.17.1
From: Frieder Schrempf <[email protected]>
Currently supported bad block marker positions within the block are:
* in first page only
* in last page only
* in first or second page
Some ESMT NANDs are known to have been shipped by the manufacturer
with bad block markers in the first or last page, instead of the
first or second page.
Also the datasheets for Cypress/Spansion/AMD NANDs claim that the
first, second *and* last page needs to be checked.
Therefore we make it possible to set NAND_BBM_FIRSTPAGE,
NAND_BBM_SECONDPAGE and NAND_BBM_LASTPAGE independently in any
combination.
To simplify the code, the logic to evaluate the flags is moved to a
a new function nand_bbm_get_next_page().
Signed-off-by: Frieder Schrempf <[email protected]>
---
drivers/mtd/nand/raw/internals.h | 1 +
drivers/mtd/nand/raw/nand_base.c | 62 ++++++++++++++++++++++++-----------
drivers/mtd/nand/raw/nand_bbt.c | 29 +++++++---------
3 files changed, 55 insertions(+), 37 deletions(-)
diff --git a/drivers/mtd/nand/raw/internals.h b/drivers/mtd/nand/raw/internals.h
index fbf6ca015cd7..97ae67e009d5 100644
--- a/drivers/mtd/nand/raw/internals.h
+++ b/drivers/mtd/nand/raw/internals.h
@@ -76,6 +76,7 @@ extern const struct nand_manufacturer_ops toshiba_nand_manuf_ops;
/* Core functions */
const struct nand_manufacturer *nand_get_manufacturer(u8 id);
+int nand_bbm_get_next_page(struct nand_chip *chip, int page);
int nand_markbad_bbm(struct nand_chip *chip, loff_t ofs);
int nand_erase_nand(struct nand_chip *chip, struct erase_info *instr,
int allowbbt);
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 9ef7b86cdc42..7bc20c1fe23c 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -285,6 +285,31 @@ static void nand_release_device(struct nand_chip *chip)
spin_unlock(&chip->controller->lock);
}
+/**
+ * nand_bbm_get_next_page - Get the next page for bad block markers
+ * @chip: NAND chip object
+ * @index: Current page, only pages beyond this will be considered
+ *
+ * Returns an integer that corresponds to the page offset within a block, for
+ * a page that is used to store bad block markers. If no more pages are
+ * available, -1 is returned.
+ */
+int nand_bbm_get_next_page(struct nand_chip *chip, int page)
+{
+ struct mtd_info *mtd = nand_to_mtd(chip);
+ int last_page = ((mtd->erasesize - mtd->writesize) >>
+ chip->page_shift) & chip->pagemask;
+
+ if (page < 0 && chip->options & NAND_BBM_FIRSTPAGE)
+ return 0;
+ else if (page < 1 && chip->options & NAND_BBM_SECONDPAGE)
+ return 1;
+ else if (page < last_page && chip->options & NAND_BBM_LASTPAGE)
+ return last_page;
+
+ return -1;
+}
+
/**
* nand_block_bad - [DEFAULT] Read bad block marker from the chip
* @chip: NAND chip object
@@ -294,19 +319,14 @@ static void nand_release_device(struct nand_chip *chip)
*/
static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
{
- struct mtd_info *mtd = nand_to_mtd(chip);
- int page, page_end, res;
+ int page_offset;
+ int res, first_page = (int)(ofs >> chip->page_shift) & chip->pagemask;
u8 bad;
- if (chip->options & NAND_BBM_LASTPAGE)
- ofs += mtd->erasesize - mtd->writesize;
+ page_offset = nand_bbm_get_next_page(chip, -1);
- page = (int)(ofs >> chip->page_shift) & chip->pagemask;
- page_end = page + (((chip->options & NAND_BBM_FIRSTPAGE) &&
- (chip->options & NAND_BBM_SECONDPAGE)) ? 2 : 1);
-
- for (; page < page_end; page++) {
- res = chip->ecc.read_oob(chip, page);
+ while (page_offset != -1) {
+ res = chip->ecc.read_oob(chip, first_page + page_offset);
if (res < 0)
return res;
@@ -318,6 +338,8 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
res = hweight8(bad) < chip->badblockbits;
if (res)
return res;
+
+ page_offset = nand_bbm_get_next_page(chip, page_offset);
}
return 0;
@@ -528,7 +550,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
struct mtd_info *mtd = nand_to_mtd(chip);
struct mtd_oob_ops ops;
uint8_t buf[2] = { 0, 0 };
- int ret = 0, res, i = 0;
+ int ret = 0, res, page_offset;
memset(&ops, 0, sizeof(ops));
ops.oobbuf = buf;
@@ -541,18 +563,18 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
}
ops.mode = MTD_OPS_PLACE_OOB;
- /* Write to first/last page(s) if necessary */
- if (chip->options & NAND_BBM_LASTPAGE)
- ofs += mtd->erasesize - mtd->writesize;
- do {
- res = nand_do_write_oob(chip, ofs, &ops);
+ page_offset = nand_bbm_get_next_page(chip, -1);
+
+ while (page_offset != -1) {
+ res = nand_do_write_oob(chip,
+ ofs + page_offset * mtd->writesize,
+ &ops);
+
if (!ret)
ret = res;
- i++;
- ofs += mtd->writesize;
- } while ((chip->options & NAND_BBM_FIRSTPAGE) &&
- (chip->options & NAND_BBM_SECONDPAGE) && i < 2);
+ page_offset = nand_bbm_get_next_page(chip, page_offset);
+ }
return ret;
}
diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c
index c095c04d566d..09603c502931 100644
--- a/drivers/mtd/nand/raw/nand_bbt.c
+++ b/drivers/mtd/nand/raw/nand_bbt.c
@@ -415,11 +415,12 @@ static void read_abs_bbts(struct nand_chip *this, uint8_t *buf,
/* Scan a given block partially */
static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
- loff_t offs, uint8_t *buf, int numpages)
+ loff_t offs, uint8_t *buf)
{
struct mtd_info *mtd = nand_to_mtd(this);
+
struct mtd_oob_ops ops;
- int j, ret;
+ int ret, page_offset;
ops.ooblen = mtd->oobsize;
ops.oobbuf = buf;
@@ -427,12 +428,15 @@ static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
ops.datbuf = NULL;
ops.mode = MTD_OPS_PLACE_OOB;
- for (j = 0; j < numpages; j++) {
+ page_offset = nand_bbm_get_next_page(this, -1);
+
+ while (page_offset != -1) {
/*
* Read the full oob until read_oob is fixed to handle single
* byte reads for 16 bit buswidth.
*/
- ret = mtd_read_oob(mtd, offs, &ops);
+ ret = mtd_read_oob(mtd, offs + page_offset * mtd->writesize,
+ &ops);
/* Ignore ECC errors when checking for BBM */
if (ret && !mtd_is_bitflip_or_eccerr(ret))
return ret;
@@ -440,8 +444,9 @@ static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
if (check_short_pattern(buf, bd))
return 1;
- offs += mtd->writesize;
+ page_offset = nand_bbm_get_next_page(this, page_offset);
}
+
return 0;
}
@@ -460,18 +465,11 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
struct nand_bbt_descr *bd, int chip)
{
struct mtd_info *mtd = nand_to_mtd(this);
- int i, numblocks, numpages;
- int startblock;
+ int i, numblocks, startblock;
loff_t from;
pr_info("Scanning device for bad blocks\n");
- if ((this->options & NAND_BBM_FIRSTPAGE) &&
- (this->options & NAND_BBM_SECONDPAGE))
- numpages = 2;
- else
- numpages = 1;
-
if (chip == -1) {
numblocks = mtd->size >> this->bbt_erase_shift;
startblock = 0;
@@ -488,15 +486,12 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
from = (loff_t)startblock << this->bbt_erase_shift;
}
- if (this->bbt_options & NAND_BBM_LASTPAGE)
- from += mtd->erasesize - (mtd->writesize * numpages);
-
for (i = startblock; i < numblocks; i++) {
int ret;
BUG_ON(bd->options & NAND_BBT_NO_OOB);
- ret = scan_block_fast(this, bd, from, buf, numpages);
+ ret = scan_block_fast(this, bd, from, buf);
if (ret < 0)
return ret;
--
2.17.1
On 22.01.19 12:22, Schrempf Frieder wrote:
> From: Frieder Schrempf <[email protected]>
>
> Currently supported bad block marker positions within the block are:
> * in first page only
> * in last page only
> * in first or second page
>
> Some ESMT NANDs are known to have been shipped by the manufacturer
> with bad block markers in the first or last page, instead of the
> first or second page.
>
> Also the datasheets for Cypress/Spansion/AMD NANDs claim that the
> first, second *and* last page needs to be checked.
>
> Therefore we make it possible to set NAND_BBT_SCAN2NDPAGE and
> NAND_BBT_SCANLASTPAGE at the same time to scan/set all three pages.
In v2 the flags were redefined and are now called NAND_BBM_FIRSTPAGE,
NAND_BBM_FIRSTPAGE and NAND_BBM_LASTPAGE. I forgot to edit this paragraph.
>
> This series also contains patches for AMD/Spansion/Cypress and ESMT
> chips to enable both flags at the same time.
> ---
> Changes in v2:
> ==============
> * Rebase on 5.0-rc1
> * Add patch to move bad block marker position info to a common place and
> rename/prepare existing flags
> * improve/rename function nand_bbm_get_next_page() to use new flags
> ---
> Frieder Schrempf (4):
> mtd: nand: Always store info about bad block markers in chip struct
> mtd: rawnand: Support bad block markers in first, second or last page
> mtd: rawnand: ESMT: Also use the last page for bad block markers
> mtd: rawnand: AMD: Also use the last page for bad block markers
>
> drivers/mtd/nand/onenand/onenand_base.c | 2 +-
> drivers/mtd/nand/onenand/onenand_bbt.c | 2 +-
> drivers/mtd/nand/raw/internals.h | 1 +
> drivers/mtd/nand/raw/nand_amd.c | 8 +++-
> drivers/mtd/nand/raw/nand_base.c | 64 +++++++++++++++++--------
> drivers/mtd/nand/raw/nand_bbt.c | 28 +++++------
> drivers/mtd/nand/raw/nand_esmt.c | 9 +++-
> drivers/mtd/nand/raw/nand_hynix.c | 4 +-
> drivers/mtd/nand/raw/nand_macronix.c | 2 +-
> drivers/mtd/nand/raw/nand_micron.c | 2 +-
> drivers/mtd/nand/raw/nand_samsung.c | 4 +-
> drivers/mtd/nand/raw/nand_toshiba.c | 2 +-
> drivers/mtd/nand/raw/sh_flctl.c | 4 +-
> include/linux/mtd/bbm.h | 14 +-----
> include/linux/mtd/rawnand.h | 16 +++++++
> 15 files changed, 100 insertions(+), 62 deletions(-)
>
On 22.01.19 12:22, Schrempf Frieder wrote:
> From: Frieder Schrempf <[email protected]>
>
> The information about where the manufacturer puts the bad block
> markers inside the bad block and in the OOB data is stored in
> different places. Let's move this information to nand_chip.options
> and nand_chip.badblockpos.
>
> As this chip-specific information is not directly related to the
> bad block table (BBT) and to make them more flexible, we also rename
> the flags and create separate flags for storing the BBM in the first
> and the second page instead of the combined flag.
>
> Signed-off-by: Frieder.Schrempf <[email protected]>
This dot between my first and last name is obviously rubbish ;)
> ---
> drivers/mtd/nand/onenand/onenand_base.c | 2 +-
> drivers/mtd/nand/onenand/onenand_bbt.c | 2 +-
> drivers/mtd/nand/raw/nand_amd.c | 2 +-
> drivers/mtd/nand/raw/nand_base.c | 14 ++++++++------
> drivers/mtd/nand/raw/nand_bbt.c | 5 +++--
> drivers/mtd/nand/raw/nand_esmt.c | 2 +-
> drivers/mtd/nand/raw/nand_hynix.c | 4 ++--
> drivers/mtd/nand/raw/nand_macronix.c | 2 +-
> drivers/mtd/nand/raw/nand_micron.c | 2 +-
> drivers/mtd/nand/raw/nand_samsung.c | 4 ++--
> drivers/mtd/nand/raw/nand_toshiba.c | 2 +-
> drivers/mtd/nand/raw/sh_flctl.c | 4 ++--
> include/linux/mtd/bbm.h | 14 +-------------
> include/linux/mtd/rawnand.h | 16 ++++++++++++++++
> 14 files changed, 41 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c
> index 4ca4b194e7d7..d6701b8f031f 100644
> --- a/drivers/mtd/nand/onenand/onenand_base.c
> +++ b/drivers/mtd/nand/onenand/onenand_base.c
> @@ -2458,7 +2458,7 @@ static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
> bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
>
> /* We write two bytes, so we don't have to mess with 16-bit access */
> - ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
> + ofs += mtd->oobsize + (this->badblockpos & ~0x01);
> /* FIXME : What to do when marking SLC block in partition
> * with MLC erasesize? For now, it is not advisable to
> * create partitions containing both SLC and MLC regions.
> diff --git a/drivers/mtd/nand/onenand/onenand_bbt.c b/drivers/mtd/nand/onenand/onenand_bbt.c
> index dde20487937d..880b0abd36c8 100644
> --- a/drivers/mtd/nand/onenand/onenand_bbt.c
> +++ b/drivers/mtd/nand/onenand/onenand_bbt.c
> @@ -191,7 +191,7 @@ static int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
> return -ENOMEM;
>
> /* Set the bad block position */
> - bbm->badblockpos = ONENAND_BADBLOCK_POS;
> + this->badblockpos = NAND_BBM_POS_ONENAND;
>
> /* Set erase shift */
> bbm->bbt_erase_shift = this->erase_shift;
> diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c
> index 890c5b43e03c..6202cbf7ee8d 100644
> --- a/drivers/mtd/nand/raw/nand_amd.c
> +++ b/drivers/mtd/nand/raw/nand_amd.c
> @@ -40,7 +40,7 @@ static void amd_nand_decode_id(struct nand_chip *chip)
> static int amd_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> return 0;
> }
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index cca4b24d2ffa..9ef7b86cdc42 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -298,11 +298,12 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
> int page, page_end, res;
> u8 bad;
>
> - if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
> + if (chip->options & NAND_BBM_LASTPAGE)
> ofs += mtd->erasesize - mtd->writesize;
>
> page = (int)(ofs >> chip->page_shift) & chip->pagemask;
> - page_end = page + (chip->bbt_options & NAND_BBT_SCAN2NDPAGE ? 2 : 1);
> + page_end = page + (((chip->options & NAND_BBM_FIRSTPAGE) &&
> + (chip->options & NAND_BBM_SECONDPAGE)) ? 2 : 1);
>
> for (; page < page_end; page++) {
> res = chip->ecc.read_oob(chip, page);
> @@ -541,7 +542,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
> ops.mode = MTD_OPS_PLACE_OOB;
>
> /* Write to first/last page(s) if necessary */
> - if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
> + if (chip->options & NAND_BBM_LASTPAGE)
> ofs += mtd->erasesize - mtd->writesize;
> do {
> res = nand_do_write_oob(chip, ofs, &ops);
> @@ -550,7 +551,8 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
>
> i++;
> ofs += mtd->writesize;
> - } while ((chip->bbt_options & NAND_BBT_SCAN2NDPAGE) && i < 2);
> + } while ((chip->options & NAND_BBM_FIRSTPAGE) &&
> + (chip->options & NAND_BBM_SECONDPAGE) && i < 2);
>
> return ret;
> }
> @@ -4576,9 +4578,9 @@ static void nand_decode_bbm_options(struct nand_chip *chip)
>
> /* Set the bad block position */
> if (mtd->writesize > 512 || (chip->options & NAND_BUSWIDTH_16))
> - chip->badblockpos = NAND_LARGE_BADBLOCK_POS;
> + chip->badblockpos = NAND_BBM_POS_LARGE;
> else
> - chip->badblockpos = NAND_SMALL_BADBLOCK_POS;
> + chip->badblockpos = NAND_BBM_POS_SMALL;
> }
>
> static inline bool is_full_id_nand(struct nand_flash_dev *type)
> diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c
> index 1b722fe9213c..c095c04d566d 100644
> --- a/drivers/mtd/nand/raw/nand_bbt.c
> +++ b/drivers/mtd/nand/raw/nand_bbt.c
> @@ -466,7 +466,8 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
>
> pr_info("Scanning device for bad blocks\n");
>
> - if (bd->options & NAND_BBT_SCAN2NDPAGE)
> + if ((this->options & NAND_BBM_FIRSTPAGE) &&
> + (this->options & NAND_BBM_SECONDPAGE))
> numpages = 2;
> else
> numpages = 1;
> @@ -487,7 +488,7 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
> from = (loff_t)startblock << this->bbt_erase_shift;
> }
>
> - if (this->bbt_options & NAND_BBT_SCANLASTPAGE)
> + if (this->bbt_options & NAND_BBM_LASTPAGE)
> from += mtd->erasesize - (mtd->writesize * numpages);
>
> for (i = startblock; i < numblocks; i++) {
> diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c
> index 96f039a83bc8..99a8092969a7 100644
> --- a/drivers/mtd/nand/raw/nand_esmt.c
> +++ b/drivers/mtd/nand/raw/nand_esmt.c
> @@ -36,7 +36,7 @@ static void esmt_nand_decode_id(struct nand_chip *chip)
> static int esmt_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> return 0;
> }
> diff --git a/drivers/mtd/nand/raw/nand_hynix.c b/drivers/mtd/nand/raw/nand_hynix.c
> index 343f477362d1..e685d70c1618 100644
> --- a/drivers/mtd/nand/raw/nand_hynix.c
> +++ b/drivers/mtd/nand/raw/nand_hynix.c
> @@ -672,9 +672,9 @@ static int hynix_nand_init(struct nand_chip *chip)
> int ret;
>
> if (!nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
> + chip->options |= NAND_BBM_LASTPAGE;
> else
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> hynix = kzalloc(sizeof(*hynix), GFP_KERNEL);
> if (!hynix)
> diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
> index 47d8cda547cf..e287e71347c5 100644
> --- a/drivers/mtd/nand/raw/nand_macronix.c
> +++ b/drivers/mtd/nand/raw/nand_macronix.c
> @@ -62,7 +62,7 @@ static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
> static int macronix_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> macronix_nand_fix_broken_get_timings(chip);
>
> diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
> index b85e1c13b79e..ca80e09783c7 100644
> --- a/drivers/mtd/nand/raw/nand_micron.c
> +++ b/drivers/mtd/nand/raw/nand_micron.c
> @@ -448,7 +448,7 @@ static int micron_nand_init(struct nand_chip *chip)
> goto err_free_manuf_data;
>
> if (mtd->writesize == 2048)
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> ondie = micron_supports_on_die_ecc(chip);
>
> diff --git a/drivers/mtd/nand/raw/nand_samsung.c b/drivers/mtd/nand/raw/nand_samsung.c
> index e46d4c492ad8..ace50522dd19 100644
> --- a/drivers/mtd/nand/raw/nand_samsung.c
> +++ b/drivers/mtd/nand/raw/nand_samsung.c
> @@ -121,9 +121,9 @@ static int samsung_nand_init(struct nand_chip *chip)
> chip->options |= NAND_SAMSUNG_LP_OPTIONS;
>
> if (!nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
> + chip->options |= NAND_BBM_LASTPAGE;
> else
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> return 0;
> }
> diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
> index d068163b64b3..0031e6727193 100644
> --- a/drivers/mtd/nand/raw/nand_toshiba.c
> +++ b/drivers/mtd/nand/raw/nand_toshiba.c
> @@ -147,7 +147,7 @@ static void toshiba_nand_decode_id(struct nand_chip *chip)
> static int toshiba_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> /* Check that chip is BENAND and ECC mode is on-die */
> if (nand_is_slc(chip) && chip->ecc.mode == NAND_ECC_ON_DIE &&
> diff --git a/drivers/mtd/nand/raw/sh_flctl.c b/drivers/mtd/nand/raw/sh_flctl.c
> index cf6b1be1cf9c..971d9afd55e5 100644
> --- a/drivers/mtd/nand/raw/sh_flctl.c
> +++ b/drivers/mtd/nand/raw/sh_flctl.c
> @@ -101,14 +101,12 @@ static const struct mtd_ooblayout_ops flctl_4secc_oob_largepage_ops = {
> static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
>
> static struct nand_bbt_descr flctl_4secc_smallpage = {
> - .options = NAND_BBT_SCAN2NDPAGE,
> .offs = 11,
> .len = 1,
> .pattern = scan_ff_pattern,
> };
>
> static struct nand_bbt_descr flctl_4secc_largepage = {
> - .options = NAND_BBT_SCAN2NDPAGE,
> .offs = 0,
> .len = 2,
> .pattern = scan_ff_pattern,
> @@ -1178,6 +1176,8 @@ static int flctl_probe(struct platform_device *pdev)
> if (pdata->flcmncr_val & SEL_16BIT)
> nand->options |= NAND_BUSWIDTH_16;
>
> + nand->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
> +
> pm_runtime_enable(&pdev->dev);
> pm_runtime_resume(&pdev->dev);
>
> diff --git a/include/linux/mtd/bbm.h b/include/linux/mtd/bbm.h
> index 3102bd754d18..010bc5544c54 100644
> --- a/include/linux/mtd/bbm.h
> +++ b/include/linux/mtd/bbm.h
> @@ -93,10 +93,7 @@ struct nand_bbt_descr {
> #define NAND_BBT_WRITE 0x00002000
> /* Read and write back block contents when writing bbt */
> #define NAND_BBT_SAVECONTENT 0x00004000
> -/* Search good / bad pattern on the first and the second page */
> -#define NAND_BBT_SCAN2NDPAGE 0x00008000
> -/* Search good / bad pattern on the last page of the eraseblock */
> -#define NAND_BBT_SCANLASTPAGE 0x00010000
> +
> /*
> * Use a flash based bad block table. By default, OOB identifier is saved in
> * OOB area. This option is passed to the default bad block table function.
> @@ -123,13 +120,6 @@ struct nand_bbt_descr {
> /* The maximum number of blocks to scan for a bbt */
> #define NAND_BBT_SCAN_MAXBLOCKS 4
>
> -/*
> - * Constants for oob configuration
> - */
> -#define NAND_SMALL_BADBLOCK_POS 5
> -#define NAND_LARGE_BADBLOCK_POS 0
> -#define ONENAND_BADBLOCK_POS 0
> -
> /*
> * Bad block scanning errors
> */
> @@ -140,7 +130,6 @@ struct nand_bbt_descr {
> /**
> * struct bbm_info - [GENERIC] Bad Block Table data structure
> * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
> - * @badblockpos: [INTERN] position of the bad block marker in the oob area
> * @options: options for this descriptor
> * @bbt: [INTERN] bad block table pointer
> * @isbad_bbt: function to determine if a block is bad
> @@ -150,7 +139,6 @@ struct nand_bbt_descr {
> */
> struct bbm_info {
> int bbt_erase_shift;
> - int badblockpos;
> int options;
>
> uint8_t *bbt;
> diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
> index 33e240acdc6d..80bd3da06bec 100644
> --- a/include/linux/mtd/rawnand.h
> +++ b/include/linux/mtd/rawnand.h
> @@ -169,6 +169,22 @@ enum nand_ecc_algo {
> /* Macros to identify the above */
> #define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
>
> +/*
> + * There are different places where the manufacturer stores the factory bad
> + * block markers.
> + *
> + * Position within the block: Each of these pages needs to be checked for a
> + * bad block marking pattern.
> + */
> +#define NAND_BBM_FIRSTPAGE 0x00008000
> +#define NAND_BBM_SECONDPAGE 0x00010000
> +#define NAND_BBM_LASTPAGE 0x00020000
> +
> +/* Position within the OOB data of the page */
> +#define NAND_BBM_POS_SMALL 5
> +#define NAND_BBM_POS_LARGE 0
> +#define NAND_BBM_POS_ONENAND 0
> +
> /* Non chip related options */
> /* This option skips the bbt scan during initialization. */
> #define NAND_SKIP_BBTSCAN 0x00010000
>
On Tue, 22 Jan 2019 11:23:29 +0000
Schrempf Frieder <[email protected]> wrote:
> From: Frieder Schrempf <[email protected]>
>
> The information about where the manufacturer puts the bad block
> markers inside the bad block and in the OOB data is stored in
> different places. Let's move this information to nand_chip.options
> and nand_chip.badblockpos.
>
> As this chip-specific information is not directly related to the
> bad block table (BBT) and to make them more flexible, we also rename
> the flags and create separate flags for storing the BBM in the first
> and the second page instead of the combined flag.
The separation for first and second page flags should IMO be done in a
separate patch. Looks good otherwise.
>
> Signed-off-by: Frieder.Schrempf <[email protected]>
> ---
> drivers/mtd/nand/onenand/onenand_base.c | 2 +-
> drivers/mtd/nand/onenand/onenand_bbt.c | 2 +-
> drivers/mtd/nand/raw/nand_amd.c | 2 +-
> drivers/mtd/nand/raw/nand_base.c | 14 ++++++++------
> drivers/mtd/nand/raw/nand_bbt.c | 5 +++--
> drivers/mtd/nand/raw/nand_esmt.c | 2 +-
> drivers/mtd/nand/raw/nand_hynix.c | 4 ++--
> drivers/mtd/nand/raw/nand_macronix.c | 2 +-
> drivers/mtd/nand/raw/nand_micron.c | 2 +-
> drivers/mtd/nand/raw/nand_samsung.c | 4 ++--
> drivers/mtd/nand/raw/nand_toshiba.c | 2 +-
> drivers/mtd/nand/raw/sh_flctl.c | 4 ++--
> include/linux/mtd/bbm.h | 14 +-------------
> include/linux/mtd/rawnand.h | 16 ++++++++++++++++
> 14 files changed, 41 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c
> index 4ca4b194e7d7..d6701b8f031f 100644
> --- a/drivers/mtd/nand/onenand/onenand_base.c
> +++ b/drivers/mtd/nand/onenand/onenand_base.c
> @@ -2458,7 +2458,7 @@ static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
> bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
>
> /* We write two bytes, so we don't have to mess with 16-bit access */
> - ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
> + ofs += mtd->oobsize + (this->badblockpos & ~0x01);
> /* FIXME : What to do when marking SLC block in partition
> * with MLC erasesize? For now, it is not advisable to
> * create partitions containing both SLC and MLC regions.
> diff --git a/drivers/mtd/nand/onenand/onenand_bbt.c b/drivers/mtd/nand/onenand/onenand_bbt.c
> index dde20487937d..880b0abd36c8 100644
> --- a/drivers/mtd/nand/onenand/onenand_bbt.c
> +++ b/drivers/mtd/nand/onenand/onenand_bbt.c
> @@ -191,7 +191,7 @@ static int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
> return -ENOMEM;
>
> /* Set the bad block position */
> - bbm->badblockpos = ONENAND_BADBLOCK_POS;
> + this->badblockpos = NAND_BBM_POS_ONENAND;
>
> /* Set erase shift */
> bbm->bbt_erase_shift = this->erase_shift;
> diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c
> index 890c5b43e03c..6202cbf7ee8d 100644
> --- a/drivers/mtd/nand/raw/nand_amd.c
> +++ b/drivers/mtd/nand/raw/nand_amd.c
> @@ -40,7 +40,7 @@ static void amd_nand_decode_id(struct nand_chip *chip)
> static int amd_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> return 0;
> }
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index cca4b24d2ffa..9ef7b86cdc42 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -298,11 +298,12 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
> int page, page_end, res;
> u8 bad;
>
> - if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
> + if (chip->options & NAND_BBM_LASTPAGE)
> ofs += mtd->erasesize - mtd->writesize;
>
> page = (int)(ofs >> chip->page_shift) & chip->pagemask;
> - page_end = page + (chip->bbt_options & NAND_BBT_SCAN2NDPAGE ? 2 : 1);
> + page_end = page + (((chip->options & NAND_BBM_FIRSTPAGE) &&
> + (chip->options & NAND_BBM_SECONDPAGE)) ? 2 : 1);
>
> for (; page < page_end; page++) {
> res = chip->ecc.read_oob(chip, page);
> @@ -541,7 +542,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
> ops.mode = MTD_OPS_PLACE_OOB;
>
> /* Write to first/last page(s) if necessary */
> - if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
> + if (chip->options & NAND_BBM_LASTPAGE)
> ofs += mtd->erasesize - mtd->writesize;
> do {
> res = nand_do_write_oob(chip, ofs, &ops);
> @@ -550,7 +551,8 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
>
> i++;
> ofs += mtd->writesize;
> - } while ((chip->bbt_options & NAND_BBT_SCAN2NDPAGE) && i < 2);
> + } while ((chip->options & NAND_BBM_FIRSTPAGE) &&
> + (chip->options & NAND_BBM_SECONDPAGE) && i < 2);
>
> return ret;
> }
> @@ -4576,9 +4578,9 @@ static void nand_decode_bbm_options(struct nand_chip *chip)
>
> /* Set the bad block position */
> if (mtd->writesize > 512 || (chip->options & NAND_BUSWIDTH_16))
> - chip->badblockpos = NAND_LARGE_BADBLOCK_POS;
> + chip->badblockpos = NAND_BBM_POS_LARGE;
> else
> - chip->badblockpos = NAND_SMALL_BADBLOCK_POS;
> + chip->badblockpos = NAND_BBM_POS_SMALL;
> }
>
> static inline bool is_full_id_nand(struct nand_flash_dev *type)
> diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c
> index 1b722fe9213c..c095c04d566d 100644
> --- a/drivers/mtd/nand/raw/nand_bbt.c
> +++ b/drivers/mtd/nand/raw/nand_bbt.c
> @@ -466,7 +466,8 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
>
> pr_info("Scanning device for bad blocks\n");
>
> - if (bd->options & NAND_BBT_SCAN2NDPAGE)
> + if ((this->options & NAND_BBM_FIRSTPAGE) &&
> + (this->options & NAND_BBM_SECONDPAGE))
> numpages = 2;
> else
> numpages = 1;
> @@ -487,7 +488,7 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
> from = (loff_t)startblock << this->bbt_erase_shift;
> }
>
> - if (this->bbt_options & NAND_BBT_SCANLASTPAGE)
> + if (this->bbt_options & NAND_BBM_LASTPAGE)
> from += mtd->erasesize - (mtd->writesize * numpages);
>
> for (i = startblock; i < numblocks; i++) {
> diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c
> index 96f039a83bc8..99a8092969a7 100644
> --- a/drivers/mtd/nand/raw/nand_esmt.c
> +++ b/drivers/mtd/nand/raw/nand_esmt.c
> @@ -36,7 +36,7 @@ static void esmt_nand_decode_id(struct nand_chip *chip)
> static int esmt_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> return 0;
> }
> diff --git a/drivers/mtd/nand/raw/nand_hynix.c b/drivers/mtd/nand/raw/nand_hynix.c
> index 343f477362d1..e685d70c1618 100644
> --- a/drivers/mtd/nand/raw/nand_hynix.c
> +++ b/drivers/mtd/nand/raw/nand_hynix.c
> @@ -672,9 +672,9 @@ static int hynix_nand_init(struct nand_chip *chip)
> int ret;
>
> if (!nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
> + chip->options |= NAND_BBM_LASTPAGE;
> else
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> hynix = kzalloc(sizeof(*hynix), GFP_KERNEL);
> if (!hynix)
> diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
> index 47d8cda547cf..e287e71347c5 100644
> --- a/drivers/mtd/nand/raw/nand_macronix.c
> +++ b/drivers/mtd/nand/raw/nand_macronix.c
> @@ -62,7 +62,7 @@ static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
> static int macronix_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> macronix_nand_fix_broken_get_timings(chip);
>
> diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
> index b85e1c13b79e..ca80e09783c7 100644
> --- a/drivers/mtd/nand/raw/nand_micron.c
> +++ b/drivers/mtd/nand/raw/nand_micron.c
> @@ -448,7 +448,7 @@ static int micron_nand_init(struct nand_chip *chip)
> goto err_free_manuf_data;
>
> if (mtd->writesize == 2048)
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> ondie = micron_supports_on_die_ecc(chip);
>
> diff --git a/drivers/mtd/nand/raw/nand_samsung.c b/drivers/mtd/nand/raw/nand_samsung.c
> index e46d4c492ad8..ace50522dd19 100644
> --- a/drivers/mtd/nand/raw/nand_samsung.c
> +++ b/drivers/mtd/nand/raw/nand_samsung.c
> @@ -121,9 +121,9 @@ static int samsung_nand_init(struct nand_chip *chip)
> chip->options |= NAND_SAMSUNG_LP_OPTIONS;
>
> if (!nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
> + chip->options |= NAND_BBM_LASTPAGE;
> else
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> return 0;
> }
> diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
> index d068163b64b3..0031e6727193 100644
> --- a/drivers/mtd/nand/raw/nand_toshiba.c
> +++ b/drivers/mtd/nand/raw/nand_toshiba.c
> @@ -147,7 +147,7 @@ static void toshiba_nand_decode_id(struct nand_chip *chip)
> static int toshiba_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>
> /* Check that chip is BENAND and ECC mode is on-die */
> if (nand_is_slc(chip) && chip->ecc.mode == NAND_ECC_ON_DIE &&
> diff --git a/drivers/mtd/nand/raw/sh_flctl.c b/drivers/mtd/nand/raw/sh_flctl.c
> index cf6b1be1cf9c..971d9afd55e5 100644
> --- a/drivers/mtd/nand/raw/sh_flctl.c
> +++ b/drivers/mtd/nand/raw/sh_flctl.c
> @@ -101,14 +101,12 @@ static const struct mtd_ooblayout_ops flctl_4secc_oob_largepage_ops = {
> static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
>
> static struct nand_bbt_descr flctl_4secc_smallpage = {
> - .options = NAND_BBT_SCAN2NDPAGE,
> .offs = 11,
> .len = 1,
> .pattern = scan_ff_pattern,
> };
>
> static struct nand_bbt_descr flctl_4secc_largepage = {
> - .options = NAND_BBT_SCAN2NDPAGE,
> .offs = 0,
> .len = 2,
> .pattern = scan_ff_pattern,
> @@ -1178,6 +1176,8 @@ static int flctl_probe(struct platform_device *pdev)
> if (pdata->flcmncr_val & SEL_16BIT)
> nand->options |= NAND_BUSWIDTH_16;
>
> + nand->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
> +
> pm_runtime_enable(&pdev->dev);
> pm_runtime_resume(&pdev->dev);
>
> diff --git a/include/linux/mtd/bbm.h b/include/linux/mtd/bbm.h
> index 3102bd754d18..010bc5544c54 100644
> --- a/include/linux/mtd/bbm.h
> +++ b/include/linux/mtd/bbm.h
> @@ -93,10 +93,7 @@ struct nand_bbt_descr {
> #define NAND_BBT_WRITE 0x00002000
> /* Read and write back block contents when writing bbt */
> #define NAND_BBT_SAVECONTENT 0x00004000
> -/* Search good / bad pattern on the first and the second page */
> -#define NAND_BBT_SCAN2NDPAGE 0x00008000
> -/* Search good / bad pattern on the last page of the eraseblock */
> -#define NAND_BBT_SCANLASTPAGE 0x00010000
> +
> /*
> * Use a flash based bad block table. By default, OOB identifier is saved in
> * OOB area. This option is passed to the default bad block table function.
> @@ -123,13 +120,6 @@ struct nand_bbt_descr {
> /* The maximum number of blocks to scan for a bbt */
> #define NAND_BBT_SCAN_MAXBLOCKS 4
>
> -/*
> - * Constants for oob configuration
> - */
> -#define NAND_SMALL_BADBLOCK_POS 5
> -#define NAND_LARGE_BADBLOCK_POS 0
> -#define ONENAND_BADBLOCK_POS 0
> -
> /*
> * Bad block scanning errors
> */
> @@ -140,7 +130,6 @@ struct nand_bbt_descr {
> /**
> * struct bbm_info - [GENERIC] Bad Block Table data structure
> * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
> - * @badblockpos: [INTERN] position of the bad block marker in the oob area
> * @options: options for this descriptor
> * @bbt: [INTERN] bad block table pointer
> * @isbad_bbt: function to determine if a block is bad
> @@ -150,7 +139,6 @@ struct nand_bbt_descr {
> */
> struct bbm_info {
> int bbt_erase_shift;
> - int badblockpos;
> int options;
>
> uint8_t *bbt;
> diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
> index 33e240acdc6d..80bd3da06bec 100644
> --- a/include/linux/mtd/rawnand.h
> +++ b/include/linux/mtd/rawnand.h
> @@ -169,6 +169,22 @@ enum nand_ecc_algo {
> /* Macros to identify the above */
> #define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
>
> +/*
> + * There are different places where the manufacturer stores the factory bad
> + * block markers.
> + *
> + * Position within the block: Each of these pages needs to be checked for a
> + * bad block marking pattern.
> + */
> +#define NAND_BBM_FIRSTPAGE 0x00008000
> +#define NAND_BBM_SECONDPAGE 0x00010000
> +#define NAND_BBM_LASTPAGE 0x00020000
> +
> +/* Position within the OOB data of the page */
> +#define NAND_BBM_POS_SMALL 5
> +#define NAND_BBM_POS_LARGE 0
> +#define NAND_BBM_POS_ONENAND 0
> +
> /* Non chip related options */
> /* This option skips the bbt scan during initialization. */
> #define NAND_SKIP_BBTSCAN 0x00010000
On 22.01.19 14:18, Boris Brezillon wrote:
> On Tue, 22 Jan 2019 11:23:29 +0000
> Schrempf Frieder <[email protected]> wrote:
>
>> From: Frieder Schrempf <[email protected]>
>>
>> The information about where the manufacturer puts the bad block
>> markers inside the bad block and in the OOB data is stored in
>> different places. Let's move this information to nand_chip.options
>> and nand_chip.badblockpos.
>>
>> As this chip-specific information is not directly related to the
>> bad block table (BBT) and to make them more flexible, we also rename
>> the flags and create separate flags for storing the BBM in the first
>> and the second page instead of the combined flag.
>
> The separation for first and second page flags should IMO be done in a
> separate patch. Looks good otherwise.
Ok, I can split it up in the next version.
>
>>
>> Signed-off-by: Frieder.Schrempf <[email protected]>
>> ---
>> drivers/mtd/nand/onenand/onenand_base.c | 2 +-
>> drivers/mtd/nand/onenand/onenand_bbt.c | 2 +-
>> drivers/mtd/nand/raw/nand_amd.c | 2 +-
>> drivers/mtd/nand/raw/nand_base.c | 14 ++++++++------
>> drivers/mtd/nand/raw/nand_bbt.c | 5 +++--
>> drivers/mtd/nand/raw/nand_esmt.c | 2 +-
>> drivers/mtd/nand/raw/nand_hynix.c | 4 ++--
>> drivers/mtd/nand/raw/nand_macronix.c | 2 +-
>> drivers/mtd/nand/raw/nand_micron.c | 2 +-
>> drivers/mtd/nand/raw/nand_samsung.c | 4 ++--
>> drivers/mtd/nand/raw/nand_toshiba.c | 2 +-
>> drivers/mtd/nand/raw/sh_flctl.c | 4 ++--
>> include/linux/mtd/bbm.h | 14 +-------------
>> include/linux/mtd/rawnand.h | 16 ++++++++++++++++
>> 14 files changed, 41 insertions(+), 34 deletions(-)
>>
>> diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c
>> index 4ca4b194e7d7..d6701b8f031f 100644
>> --- a/drivers/mtd/nand/onenand/onenand_base.c
>> +++ b/drivers/mtd/nand/onenand/onenand_base.c
>> @@ -2458,7 +2458,7 @@ static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
>> bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
>>
>> /* We write two bytes, so we don't have to mess with 16-bit access */
>> - ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
>> + ofs += mtd->oobsize + (this->badblockpos & ~0x01);
>> /* FIXME : What to do when marking SLC block in partition
>> * with MLC erasesize? For now, it is not advisable to
>> * create partitions containing both SLC and MLC regions.
>> diff --git a/drivers/mtd/nand/onenand/onenand_bbt.c b/drivers/mtd/nand/onenand/onenand_bbt.c
>> index dde20487937d..880b0abd36c8 100644
>> --- a/drivers/mtd/nand/onenand/onenand_bbt.c
>> +++ b/drivers/mtd/nand/onenand/onenand_bbt.c
>> @@ -191,7 +191,7 @@ static int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
>> return -ENOMEM;
>>
>> /* Set the bad block position */
>> - bbm->badblockpos = ONENAND_BADBLOCK_POS;
>> + this->badblockpos = NAND_BBM_POS_ONENAND;
>>
>> /* Set erase shift */
>> bbm->bbt_erase_shift = this->erase_shift;
>> diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c
>> index 890c5b43e03c..6202cbf7ee8d 100644
>> --- a/drivers/mtd/nand/raw/nand_amd.c
>> +++ b/drivers/mtd/nand/raw/nand_amd.c
>> @@ -40,7 +40,7 @@ static void amd_nand_decode_id(struct nand_chip *chip)
>> static int amd_nand_init(struct nand_chip *chip)
>> {
>> if (nand_is_slc(chip))
>> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
>> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>>
>> return 0;
>> }
>> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
>> index cca4b24d2ffa..9ef7b86cdc42 100644
>> --- a/drivers/mtd/nand/raw/nand_base.c
>> +++ b/drivers/mtd/nand/raw/nand_base.c
>> @@ -298,11 +298,12 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
>> int page, page_end, res;
>> u8 bad;
>>
>> - if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
>> + if (chip->options & NAND_BBM_LASTPAGE)
>> ofs += mtd->erasesize - mtd->writesize;
>>
>> page = (int)(ofs >> chip->page_shift) & chip->pagemask;
>> - page_end = page + (chip->bbt_options & NAND_BBT_SCAN2NDPAGE ? 2 : 1);
>> + page_end = page + (((chip->options & NAND_BBM_FIRSTPAGE) &&
>> + (chip->options & NAND_BBM_SECONDPAGE)) ? 2 : 1);
>>
>> for (; page < page_end; page++) {
>> res = chip->ecc.read_oob(chip, page);
>> @@ -541,7 +542,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
>> ops.mode = MTD_OPS_PLACE_OOB;
>>
>> /* Write to first/last page(s) if necessary */
>> - if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
>> + if (chip->options & NAND_BBM_LASTPAGE)
>> ofs += mtd->erasesize - mtd->writesize;
>> do {
>> res = nand_do_write_oob(chip, ofs, &ops);
>> @@ -550,7 +551,8 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
>>
>> i++;
>> ofs += mtd->writesize;
>> - } while ((chip->bbt_options & NAND_BBT_SCAN2NDPAGE) && i < 2);
>> + } while ((chip->options & NAND_BBM_FIRSTPAGE) &&
>> + (chip->options & NAND_BBM_SECONDPAGE) && i < 2);
>>
>> return ret;
>> }
>> @@ -4576,9 +4578,9 @@ static void nand_decode_bbm_options(struct nand_chip *chip)
>>
>> /* Set the bad block position */
>> if (mtd->writesize > 512 || (chip->options & NAND_BUSWIDTH_16))
>> - chip->badblockpos = NAND_LARGE_BADBLOCK_POS;
>> + chip->badblockpos = NAND_BBM_POS_LARGE;
>> else
>> - chip->badblockpos = NAND_SMALL_BADBLOCK_POS;
>> + chip->badblockpos = NAND_BBM_POS_SMALL;
>> }
>>
>> static inline bool is_full_id_nand(struct nand_flash_dev *type)
>> diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c
>> index 1b722fe9213c..c095c04d566d 100644
>> --- a/drivers/mtd/nand/raw/nand_bbt.c
>> +++ b/drivers/mtd/nand/raw/nand_bbt.c
>> @@ -466,7 +466,8 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
>>
>> pr_info("Scanning device for bad blocks\n");
>>
>> - if (bd->options & NAND_BBT_SCAN2NDPAGE)
>> + if ((this->options & NAND_BBM_FIRSTPAGE) &&
>> + (this->options & NAND_BBM_SECONDPAGE))
>> numpages = 2;
>> else
>> numpages = 1;
>> @@ -487,7 +488,7 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
>> from = (loff_t)startblock << this->bbt_erase_shift;
>> }
>>
>> - if (this->bbt_options & NAND_BBT_SCANLASTPAGE)
>> + if (this->bbt_options & NAND_BBM_LASTPAGE)
>> from += mtd->erasesize - (mtd->writesize * numpages);
>>
>> for (i = startblock; i < numblocks; i++) {
>> diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c
>> index 96f039a83bc8..99a8092969a7 100644
>> --- a/drivers/mtd/nand/raw/nand_esmt.c
>> +++ b/drivers/mtd/nand/raw/nand_esmt.c
>> @@ -36,7 +36,7 @@ static void esmt_nand_decode_id(struct nand_chip *chip)
>> static int esmt_nand_init(struct nand_chip *chip)
>> {
>> if (nand_is_slc(chip))
>> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
>> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>>
>> return 0;
>> }
>> diff --git a/drivers/mtd/nand/raw/nand_hynix.c b/drivers/mtd/nand/raw/nand_hynix.c
>> index 343f477362d1..e685d70c1618 100644
>> --- a/drivers/mtd/nand/raw/nand_hynix.c
>> +++ b/drivers/mtd/nand/raw/nand_hynix.c
>> @@ -672,9 +672,9 @@ static int hynix_nand_init(struct nand_chip *chip)
>> int ret;
>>
>> if (!nand_is_slc(chip))
>> - chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
>> + chip->options |= NAND_BBM_LASTPAGE;
>> else
>> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
>> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>>
>> hynix = kzalloc(sizeof(*hynix), GFP_KERNEL);
>> if (!hynix)
>> diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
>> index 47d8cda547cf..e287e71347c5 100644
>> --- a/drivers/mtd/nand/raw/nand_macronix.c
>> +++ b/drivers/mtd/nand/raw/nand_macronix.c
>> @@ -62,7 +62,7 @@ static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
>> static int macronix_nand_init(struct nand_chip *chip)
>> {
>> if (nand_is_slc(chip))
>> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
>> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>>
>> macronix_nand_fix_broken_get_timings(chip);
>>
>> diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
>> index b85e1c13b79e..ca80e09783c7 100644
>> --- a/drivers/mtd/nand/raw/nand_micron.c
>> +++ b/drivers/mtd/nand/raw/nand_micron.c
>> @@ -448,7 +448,7 @@ static int micron_nand_init(struct nand_chip *chip)
>> goto err_free_manuf_data;
>>
>> if (mtd->writesize == 2048)
>> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
>> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>>
>> ondie = micron_supports_on_die_ecc(chip);
>>
>> diff --git a/drivers/mtd/nand/raw/nand_samsung.c b/drivers/mtd/nand/raw/nand_samsung.c
>> index e46d4c492ad8..ace50522dd19 100644
>> --- a/drivers/mtd/nand/raw/nand_samsung.c
>> +++ b/drivers/mtd/nand/raw/nand_samsung.c
>> @@ -121,9 +121,9 @@ static int samsung_nand_init(struct nand_chip *chip)
>> chip->options |= NAND_SAMSUNG_LP_OPTIONS;
>>
>> if (!nand_is_slc(chip))
>> - chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
>> + chip->options |= NAND_BBM_LASTPAGE;
>> else
>> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
>> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>>
>> return 0;
>> }
>> diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
>> index d068163b64b3..0031e6727193 100644
>> --- a/drivers/mtd/nand/raw/nand_toshiba.c
>> +++ b/drivers/mtd/nand/raw/nand_toshiba.c
>> @@ -147,7 +147,7 @@ static void toshiba_nand_decode_id(struct nand_chip *chip)
>> static int toshiba_nand_init(struct nand_chip *chip)
>> {
>> if (nand_is_slc(chip))
>> - chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
>> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>>
>> /* Check that chip is BENAND and ECC mode is on-die */
>> if (nand_is_slc(chip) && chip->ecc.mode == NAND_ECC_ON_DIE &&
>> diff --git a/drivers/mtd/nand/raw/sh_flctl.c b/drivers/mtd/nand/raw/sh_flctl.c
>> index cf6b1be1cf9c..971d9afd55e5 100644
>> --- a/drivers/mtd/nand/raw/sh_flctl.c
>> +++ b/drivers/mtd/nand/raw/sh_flctl.c
>> @@ -101,14 +101,12 @@ static const struct mtd_ooblayout_ops flctl_4secc_oob_largepage_ops = {
>> static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
>>
>> static struct nand_bbt_descr flctl_4secc_smallpage = {
>> - .options = NAND_BBT_SCAN2NDPAGE,
>> .offs = 11,
>> .len = 1,
>> .pattern = scan_ff_pattern,
>> };
>>
>> static struct nand_bbt_descr flctl_4secc_largepage = {
>> - .options = NAND_BBT_SCAN2NDPAGE,
>> .offs = 0,
>> .len = 2,
>> .pattern = scan_ff_pattern,
>> @@ -1178,6 +1176,8 @@ static int flctl_probe(struct platform_device *pdev)
>> if (pdata->flcmncr_val & SEL_16BIT)
>> nand->options |= NAND_BUSWIDTH_16;
>>
>> + nand->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
>> +
>> pm_runtime_enable(&pdev->dev);
>> pm_runtime_resume(&pdev->dev);
>>
>> diff --git a/include/linux/mtd/bbm.h b/include/linux/mtd/bbm.h
>> index 3102bd754d18..010bc5544c54 100644
>> --- a/include/linux/mtd/bbm.h
>> +++ b/include/linux/mtd/bbm.h
>> @@ -93,10 +93,7 @@ struct nand_bbt_descr {
>> #define NAND_BBT_WRITE 0x00002000
>> /* Read and write back block contents when writing bbt */
>> #define NAND_BBT_SAVECONTENT 0x00004000
>> -/* Search good / bad pattern on the first and the second page */
>> -#define NAND_BBT_SCAN2NDPAGE 0x00008000
>> -/* Search good / bad pattern on the last page of the eraseblock */
>> -#define NAND_BBT_SCANLASTPAGE 0x00010000
>> +
>> /*
>> * Use a flash based bad block table. By default, OOB identifier is saved in
>> * OOB area. This option is passed to the default bad block table function.
>> @@ -123,13 +120,6 @@ struct nand_bbt_descr {
>> /* The maximum number of blocks to scan for a bbt */
>> #define NAND_BBT_SCAN_MAXBLOCKS 4
>>
>> -/*
>> - * Constants for oob configuration
>> - */
>> -#define NAND_SMALL_BADBLOCK_POS 5
>> -#define NAND_LARGE_BADBLOCK_POS 0
>> -#define ONENAND_BADBLOCK_POS 0
>> -
>> /*
>> * Bad block scanning errors
>> */
>> @@ -140,7 +130,6 @@ struct nand_bbt_descr {
>> /**
>> * struct bbm_info - [GENERIC] Bad Block Table data structure
>> * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
>> - * @badblockpos: [INTERN] position of the bad block marker in the oob area
>> * @options: options for this descriptor
>> * @bbt: [INTERN] bad block table pointer
>> * @isbad_bbt: function to determine if a block is bad
>> @@ -150,7 +139,6 @@ struct nand_bbt_descr {
>> */
>> struct bbm_info {
>> int bbt_erase_shift;
>> - int badblockpos;
>> int options;
>>
>> uint8_t *bbt;
>> diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
>> index 33e240acdc6d..80bd3da06bec 100644
>> --- a/include/linux/mtd/rawnand.h
>> +++ b/include/linux/mtd/rawnand.h
>> @@ -169,6 +169,22 @@ enum nand_ecc_algo {
>> /* Macros to identify the above */
>> #define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
>>
>> +/*
>> + * There are different places where the manufacturer stores the factory bad
>> + * block markers.
>> + *
>> + * Position within the block: Each of these pages needs to be checked for a
>> + * bad block marking pattern.
>> + */
>> +#define NAND_BBM_FIRSTPAGE 0x00008000
>> +#define NAND_BBM_SECONDPAGE 0x00010000
>> +#define NAND_BBM_LASTPAGE 0x00020000
>> +
>> +/* Position within the OOB data of the page */
>> +#define NAND_BBM_POS_SMALL 5
>> +#define NAND_BBM_POS_LARGE 0
>> +#define NAND_BBM_POS_ONENAND 0
>> +
>> /* Non chip related options */
>> /* This option skips the bbt scan during initialization. */
>> #define NAND_SKIP_BBTSCAN 0x00010000
>
On Tue, 22 Jan 2019 11:23:31 +0000
Schrempf Frieder <[email protected]> wrote:
> From: Frieder Schrempf <[email protected]>
>
> Currently supported bad block marker positions within the block are:
> * in first page only
> * in last page only
> * in first or second page
>
> Some ESMT NANDs are known to have been shipped by the manufacturer
> with bad block markers in the first or last page, instead of the
> first or second page.
>
> Also the datasheets for Cypress/Spansion/AMD NANDs claim that the
> first, second *and* last page needs to be checked.
>
> Therefore we make it possible to set NAND_BBM_FIRSTPAGE,
> NAND_BBM_SECONDPAGE and NAND_BBM_LASTPAGE independently in any
> combination.
>
> To simplify the code, the logic to evaluate the flags is moved to a
> a new function nand_bbm_get_next_page().
>
> Signed-off-by: Frieder Schrempf <[email protected]>
Reviewed-by: Boris Brezillon <[email protected]>
> ---
> drivers/mtd/nand/raw/internals.h | 1 +
> drivers/mtd/nand/raw/nand_base.c | 62 ++++++++++++++++++++++++-----------
> drivers/mtd/nand/raw/nand_bbt.c | 29 +++++++---------
> 3 files changed, 55 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/internals.h b/drivers/mtd/nand/raw/internals.h
> index fbf6ca015cd7..97ae67e009d5 100644
> --- a/drivers/mtd/nand/raw/internals.h
> +++ b/drivers/mtd/nand/raw/internals.h
> @@ -76,6 +76,7 @@ extern const struct nand_manufacturer_ops toshiba_nand_manuf_ops;
>
> /* Core functions */
> const struct nand_manufacturer *nand_get_manufacturer(u8 id);
> +int nand_bbm_get_next_page(struct nand_chip *chip, int page);
> int nand_markbad_bbm(struct nand_chip *chip, loff_t ofs);
> int nand_erase_nand(struct nand_chip *chip, struct erase_info *instr,
> int allowbbt);
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 9ef7b86cdc42..7bc20c1fe23c 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -285,6 +285,31 @@ static void nand_release_device(struct nand_chip *chip)
> spin_unlock(&chip->controller->lock);
> }
>
> +/**
> + * nand_bbm_get_next_page - Get the next page for bad block markers
> + * @chip: NAND chip object
> + * @index: Current page, only pages beyond this will be considered
> + *
> + * Returns an integer that corresponds to the page offset within a block, for
> + * a page that is used to store bad block markers. If no more pages are
> + * available, -1 is returned.
> + */
> +int nand_bbm_get_next_page(struct nand_chip *chip, int page)
> +{
> + struct mtd_info *mtd = nand_to_mtd(chip);
> + int last_page = ((mtd->erasesize - mtd->writesize) >>
> + chip->page_shift) & chip->pagemask;
> +
> + if (page < 0 && chip->options & NAND_BBM_FIRSTPAGE)
> + return 0;
> + else if (page < 1 && chip->options & NAND_BBM_SECONDPAGE)
> + return 1;
> + else if (page < last_page && chip->options & NAND_BBM_LASTPAGE)
> + return last_page;
> +
> + return -1;
> +}
> +
> /**
> * nand_block_bad - [DEFAULT] Read bad block marker from the chip
> * @chip: NAND chip object
> @@ -294,19 +319,14 @@ static void nand_release_device(struct nand_chip *chip)
> */
> static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
> {
> - struct mtd_info *mtd = nand_to_mtd(chip);
> - int page, page_end, res;
> + int page_offset;
> + int res, first_page = (int)(ofs >> chip->page_shift) & chip->pagemask;
> u8 bad;
>
> - if (chip->options & NAND_BBM_LASTPAGE)
> - ofs += mtd->erasesize - mtd->writesize;
> + page_offset = nand_bbm_get_next_page(chip, -1);
>
> - page = (int)(ofs >> chip->page_shift) & chip->pagemask;
> - page_end = page + (((chip->options & NAND_BBM_FIRSTPAGE) &&
> - (chip->options & NAND_BBM_SECONDPAGE)) ? 2 : 1);
> -
> - for (; page < page_end; page++) {
> - res = chip->ecc.read_oob(chip, page);
> + while (page_offset != -1) {
> + res = chip->ecc.read_oob(chip, first_page + page_offset);
> if (res < 0)
> return res;
>
> @@ -318,6 +338,8 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
> res = hweight8(bad) < chip->badblockbits;
> if (res)
> return res;
> +
> + page_offset = nand_bbm_get_next_page(chip, page_offset);
> }
>
> return 0;
> @@ -528,7 +550,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
> struct mtd_info *mtd = nand_to_mtd(chip);
> struct mtd_oob_ops ops;
> uint8_t buf[2] = { 0, 0 };
> - int ret = 0, res, i = 0;
> + int ret = 0, res, page_offset;
>
> memset(&ops, 0, sizeof(ops));
> ops.oobbuf = buf;
> @@ -541,18 +563,18 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
> }
> ops.mode = MTD_OPS_PLACE_OOB;
>
> - /* Write to first/last page(s) if necessary */
> - if (chip->options & NAND_BBM_LASTPAGE)
> - ofs += mtd->erasesize - mtd->writesize;
> - do {
> - res = nand_do_write_oob(chip, ofs, &ops);
> + page_offset = nand_bbm_get_next_page(chip, -1);
> +
> + while (page_offset != -1) {
> + res = nand_do_write_oob(chip,
> + ofs + page_offset * mtd->writesize,
> + &ops);
> +
> if (!ret)
> ret = res;
>
> - i++;
> - ofs += mtd->writesize;
> - } while ((chip->options & NAND_BBM_FIRSTPAGE) &&
> - (chip->options & NAND_BBM_SECONDPAGE) && i < 2);
> + page_offset = nand_bbm_get_next_page(chip, page_offset);
> + }
>
> return ret;
> }
> diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c
> index c095c04d566d..09603c502931 100644
> --- a/drivers/mtd/nand/raw/nand_bbt.c
> +++ b/drivers/mtd/nand/raw/nand_bbt.c
> @@ -415,11 +415,12 @@ static void read_abs_bbts(struct nand_chip *this, uint8_t *buf,
>
> /* Scan a given block partially */
> static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
> - loff_t offs, uint8_t *buf, int numpages)
> + loff_t offs, uint8_t *buf)
> {
> struct mtd_info *mtd = nand_to_mtd(this);
> +
> struct mtd_oob_ops ops;
> - int j, ret;
> + int ret, page_offset;
>
> ops.ooblen = mtd->oobsize;
> ops.oobbuf = buf;
> @@ -427,12 +428,15 @@ static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
> ops.datbuf = NULL;
> ops.mode = MTD_OPS_PLACE_OOB;
>
> - for (j = 0; j < numpages; j++) {
> + page_offset = nand_bbm_get_next_page(this, -1);
> +
> + while (page_offset != -1) {
> /*
> * Read the full oob until read_oob is fixed to handle single
> * byte reads for 16 bit buswidth.
> */
> - ret = mtd_read_oob(mtd, offs, &ops);
> + ret = mtd_read_oob(mtd, offs + page_offset * mtd->writesize,
> + &ops);
> /* Ignore ECC errors when checking for BBM */
> if (ret && !mtd_is_bitflip_or_eccerr(ret))
> return ret;
> @@ -440,8 +444,9 @@ static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
> if (check_short_pattern(buf, bd))
> return 1;
>
> - offs += mtd->writesize;
> + page_offset = nand_bbm_get_next_page(this, page_offset);
> }
> +
> return 0;
> }
>
> @@ -460,18 +465,11 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
> struct nand_bbt_descr *bd, int chip)
> {
> struct mtd_info *mtd = nand_to_mtd(this);
> - int i, numblocks, numpages;
> - int startblock;
> + int i, numblocks, startblock;
> loff_t from;
>
> pr_info("Scanning device for bad blocks\n");
>
> - if ((this->options & NAND_BBM_FIRSTPAGE) &&
> - (this->options & NAND_BBM_SECONDPAGE))
> - numpages = 2;
> - else
> - numpages = 1;
> -
> if (chip == -1) {
> numblocks = mtd->size >> this->bbt_erase_shift;
> startblock = 0;
> @@ -488,15 +486,12 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
> from = (loff_t)startblock << this->bbt_erase_shift;
> }
>
> - if (this->bbt_options & NAND_BBM_LASTPAGE)
> - from += mtd->erasesize - (mtd->writesize * numpages);
> -
> for (i = startblock; i < numblocks; i++) {
> int ret;
>
> BUG_ON(bd->options & NAND_BBT_NO_OOB);
>
> - ret = scan_block_fast(this, bd, from, buf, numpages);
> + ret = scan_block_fast(this, bd, from, buf);
> if (ret < 0)
> return ret;
>
On Tue, 22 Jan 2019 11:23:32 +0000
Schrempf Frieder <[email protected]> wrote:
> From: Frieder Schrempf <[email protected]>
>
> It is known that some ESMT SLC NANDs have been shipped
> with the factory bad block markers in the first or last page
> of the block, instead of the first or second page. To be on
> the safe side, let's check all three locations.
>
> Signed-off-by: Frieder Schrempf <[email protected]>
Reviewed-by: Boris Brezillon <[email protected]>
> ---
> drivers/mtd/nand/raw/nand_esmt.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c
> index 99a8092969a7..b37e0b5af5ae 100644
> --- a/drivers/mtd/nand/raw/nand_esmt.c
> +++ b/drivers/mtd/nand/raw/nand_esmt.c
> @@ -36,7 +36,14 @@ static void esmt_nand_decode_id(struct nand_chip *chip)
> static int esmt_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
> + /*
> + * It is known that some ESMT SLC NANDs have been shipped
> + * with the factory bad block markers in the first or last page
> + * of the block, instead of the first or second page. To be on
> + * the safe side, let's check all three locations.
> + */
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE |
> + NAND_BBM_LASTPAGE;
>
> return 0;
> }
On Tue, 22 Jan 2019 11:23:33 +0000
Schrempf Frieder <[email protected]> wrote:
> From: Frieder Schrempf <[email protected]>
>
> According to the datasheet of some Cypress SLC NANDs, the bad
> block markers can be in the first, second or last page of a block.
> So let's check all three locations.
>
> Signed-off-by: Frieder Schrempf <[email protected]>
Reviewed-by: Boris Brezillon <[email protected]>
> ---
> drivers/mtd/nand/raw/nand_amd.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c
> index 6202cbf7ee8d..2ffcddff3e27 100644
> --- a/drivers/mtd/nand/raw/nand_amd.c
> +++ b/drivers/mtd/nand/raw/nand_amd.c
> @@ -40,7 +40,13 @@ static void amd_nand_decode_id(struct nand_chip *chip)
> static int amd_nand_init(struct nand_chip *chip)
> {
> if (nand_is_slc(chip))
> - chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
> + /*
> + * According to the datasheet of some Cypress SLC NANDs,
> + * the bad block markers can be in the first, second or last
> + * page of a block. So let's check all three locations.
> + */
> + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE |
> + NAND_BBM_LASTPAGE;
>
> return 0;
> }