These OOB layouts are generic to all NAND chips, the should not be
restricted to be used only by raw NAND controller drivers. They might
later be used by generic ECC engines and SPI-NAND devices as well.
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
drivers/mtd/nand/ecc/engine.c | 161 +++++++++++++++++++++++++++
drivers/mtd/nand/raw/Kconfig | 1 +
drivers/mtd/nand/raw/nand_base.c | 162 +---------------------------
drivers/mtd/nand/raw/nand_toshiba.c | 2 +
include/linux/mtd/nand.h | 4 +
include/linux/mtd/rawnand.h | 3 -
6 files changed, 170 insertions(+), 163 deletions(-)
diff --git a/drivers/mtd/nand/ecc/engine.c b/drivers/mtd/nand/ecc/engine.c
index 4c7943ddf2cc..f52ffce8e684 100644
--- a/drivers/mtd/nand/ecc/engine.c
+++ b/drivers/mtd/nand/ecc/engine.c
@@ -133,6 +133,167 @@ int nand_ecc_finish_io_req(struct nand_device *nand,
}
EXPORT_SYMBOL(nand_ecc_finish_io_req);
+/* Define default oob placement schemes for large and small page devices */
+static int nand_ooblayout_ecc_sp(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_device *nand = mtd_to_nanddev(mtd);
+ unsigned int total_ecc_bytes = nand->ecc.ctx.total;
+
+ if (section > 1)
+ return -ERANGE;
+
+ if (!section) {
+ oobregion->offset = 0;
+ if (mtd->oobsize == 16)
+ oobregion->length = 4;
+ else
+ oobregion->length = 3;
+ } else {
+ if (mtd->oobsize == 8)
+ return -ERANGE;
+
+ oobregion->offset = 6;
+ oobregion->length = total_ecc_bytes - 4;
+ }
+
+ return 0;
+}
+
+static int nand_ooblayout_free_sp(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ if (section > 1)
+ return -ERANGE;
+
+ if (mtd->oobsize == 16) {
+ if (section)
+ return -ERANGE;
+
+ oobregion->length = 8;
+ oobregion->offset = 8;
+ } else {
+ oobregion->length = 2;
+ if (!section)
+ oobregion->offset = 3;
+ else
+ oobregion->offset = 6;
+ }
+
+ return 0;
+}
+
+const struct mtd_ooblayout_ops nand_ooblayout_sp_ops = {
+ .ecc = nand_ooblayout_ecc_sp,
+ .free = nand_ooblayout_free_sp,
+};
+EXPORT_SYMBOL_GPL(nand_ooblayout_sp_ops);
+
+static int nand_ooblayout_ecc_lp(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_device *nand = mtd_to_nanddev(mtd);
+ unsigned int total_ecc_bytes = nand->ecc.ctx.total;
+
+ if (section || !total_ecc_bytes)
+ return -ERANGE;
+
+ oobregion->length = total_ecc_bytes;
+ oobregion->offset = mtd->oobsize - oobregion->length;
+
+ return 0;
+}
+
+static int nand_ooblayout_free_lp(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_device *nand = mtd_to_nanddev(mtd);
+ unsigned int total_ecc_bytes = nand->ecc.ctx.total;
+
+ if (section)
+ return -ERANGE;
+
+ oobregion->length = mtd->oobsize - total_ecc_bytes - 2;
+ oobregion->offset = 2;
+
+ return 0;
+}
+
+const struct mtd_ooblayout_ops nand_ooblayout_lp_ops = {
+ .ecc = nand_ooblayout_ecc_lp,
+ .free = nand_ooblayout_free_lp,
+};
+EXPORT_SYMBOL_GPL(nand_ooblayout_lp_ops);
+
+/*
+ * Support the old "large page" layout used for 1-bit Hamming ECC where ECC
+ * are placed at a fixed offset.
+ */
+static int nand_ooblayout_ecc_lp_hamming(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_device *nand = mtd_to_nanddev(mtd);
+ unsigned int total_ecc_bytes = nand->ecc.ctx.total;
+
+ if (section)
+ return -ERANGE;
+
+ switch (mtd->oobsize) {
+ case 64:
+ oobregion->offset = 40;
+ break;
+ case 128:
+ oobregion->offset = 80;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ oobregion->length = total_ecc_bytes;
+ if (oobregion->offset + oobregion->length > mtd->oobsize)
+ return -ERANGE;
+
+ return 0;
+}
+
+static int nand_ooblayout_free_lp_hamming(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_device *nand = mtd_to_nanddev(mtd);
+ unsigned int total_ecc_bytes = nand->ecc.ctx.total;
+ int ecc_offset = 0;
+
+ if (section < 0 || section > 1)
+ return -ERANGE;
+
+ switch (mtd->oobsize) {
+ case 64:
+ ecc_offset = 40;
+ break;
+ case 128:
+ ecc_offset = 80;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (section == 0) {
+ oobregion->offset = 2;
+ oobregion->length = ecc_offset - 2;
+ } else {
+ oobregion->offset = ecc_offset + total_ecc_bytes;
+ oobregion->length = mtd->oobsize - oobregion->offset;
+ }
+
+ return 0;
+}
+
+const struct mtd_ooblayout_ops nand_ooblayout_lp_hamming_ops = {
+ .ecc = nand_ooblayout_ecc_lp_hamming,
+ .free = nand_ooblayout_free_lp_hamming,
+};
+EXPORT_SYMBOL_GPL(nand_ooblayout_lp_hamming_ops);
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Miquel Raynal <miquel.raynal@xxxxxxxxxxx>");
MODULE_DESCRIPTION("Generic ECC engine");
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 952dc50a8634..621991a242c1 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -12,6 +12,7 @@ config MTD_NAND_ECC_SW_HAMMING_SMC
menuconfig MTD_RAW_NAND
tristate "Raw/Parallel NAND Device Support"
select MTD_NAND_CORE
+ select MTD_NAND_ECC
select MTD_NAND_ECC_SW_HAMMING
help
This enables support for accessing all type of raw/parallel
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index b12ca291c7e3..187e6b1fd84d 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -38,6 +38,7 @@
#include <linux/mm.h>
#include <linux/types.h>
#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/nand_bch.h>
#include <linux/interrupt.h>
@@ -49,166 +50,6 @@
#include "internals.h"
-/* Define default oob placement schemes for large and small page devices */
-static int nand_ooblayout_ecc_sp(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- struct nand_chip *chip = mtd_to_nand(mtd);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
-
- if (section > 1)
- return -ERANGE;
-
- if (!section) {
- oobregion->offset = 0;
- if (mtd->oobsize == 16)
- oobregion->length = 4;
- else
- oobregion->length = 3;
- } else {
- if (mtd->oobsize == 8)
- return -ERANGE;
-
- oobregion->offset = 6;
- oobregion->length = ecc->total - 4;
- }
-
- return 0;
-}
-
-static int nand_ooblayout_free_sp(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- if (section > 1)
- return -ERANGE;
-
- if (mtd->oobsize == 16) {
- if (section)
- return -ERANGE;
-
- oobregion->length = 8;
- oobregion->offset = 8;
- } else {
- oobregion->length = 2;
- if (!section)
- oobregion->offset = 3;
- else
- oobregion->offset = 6;
- }
-
- return 0;
-}
-
-const struct mtd_ooblayout_ops nand_ooblayout_sp_ops = {
- .ecc = nand_ooblayout_ecc_sp,
- .free = nand_ooblayout_free_sp,
-};
-EXPORT_SYMBOL_GPL(nand_ooblayout_sp_ops);
-
-static int nand_ooblayout_ecc_lp(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- struct nand_chip *chip = mtd_to_nand(mtd);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
-
- if (section || !ecc->total)
- return -ERANGE;
-
- oobregion->length = ecc->total;
- oobregion->offset = mtd->oobsize - oobregion->length;
-
- return 0;
-}
-
-static int nand_ooblayout_free_lp(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- struct nand_chip *chip = mtd_to_nand(mtd);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
-
- if (section)
- return -ERANGE;
-
- oobregion->length = mtd->oobsize - ecc->total - 2;
- oobregion->offset = 2;
-
- return 0;
-}
-
-const struct mtd_ooblayout_ops nand_ooblayout_lp_ops = {
- .ecc = nand_ooblayout_ecc_lp,
- .free = nand_ooblayout_free_lp,
-};
-EXPORT_SYMBOL_GPL(nand_ooblayout_lp_ops);
-
-/*
- * Support the old "large page" layout used for 1-bit Hamming ECC where ECC
- * are placed at a fixed offset.
- */
-static int nand_ooblayout_ecc_lp_hamming(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- struct nand_chip *chip = mtd_to_nand(mtd);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
-
- if (section)
- return -ERANGE;
-
- switch (mtd->oobsize) {
- case 64:
- oobregion->offset = 40;
- break;
- case 128:
- oobregion->offset = 80;
- break;
- default:
- return -EINVAL;
- }
-
- oobregion->length = ecc->total;
- if (oobregion->offset + oobregion->length > mtd->oobsize)
- return -ERANGE;
-
- return 0;
-}
-
-static int nand_ooblayout_free_lp_hamming(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- struct nand_chip *chip = mtd_to_nand(mtd);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
- int ecc_offset = 0;
-
- if (section < 0 || section > 1)
- return -ERANGE;
-
- switch (mtd->oobsize) {
- case 64:
- ecc_offset = 40;
- break;
- case 128:
- ecc_offset = 80;
- break;
- default:
- return -EINVAL;
- }
-
- if (section == 0) {
- oobregion->offset = 2;
- oobregion->length = ecc_offset - 2;
- } else {
- oobregion->offset = ecc_offset + ecc->total;
- oobregion->length = mtd->oobsize - oobregion->offset;
- }
-
- return 0;
-}
-
-static const struct mtd_ooblayout_ops nand_ooblayout_lp_hamming_ops = {
- .ecc = nand_ooblayout_ecc_lp_hamming,
- .free = nand_ooblayout_free_lp_hamming,
-};
-
static int check_offs_len(struct nand_chip *chip, loff_t ofs, uint64_t len)
{
int ret = 0;
@@ -5735,6 +5576,7 @@ static int nand_scan_tail(struct nand_chip *chip)
goto err_nand_manuf_cleanup;
}
ecc->total = ecc->steps * ecc->bytes;
+ chip->base.ecc.ctx.total = ecc->total;
if (ecc->total > mtd->oobsize) {
WARN(1, "Total number of ECC bytes exceeded oobsize\n");
ret = -EINVAL;
diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
index f00d958d724f..566cc1a11679 100644
--- a/drivers/mtd/nand/raw/nand_toshiba.c
+++ b/drivers/mtd/nand/raw/nand_toshiba.c
@@ -15,6 +15,8 @@
* GNU General Public License for more details.
*/
+#include <linux/mtd/nand.h>
+
#include "internals.h"
/* Bit for detecting BENAND */
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 45caaa489085..277c0cf822b9 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -122,6 +122,10 @@ struct nand_page_io_req {
int mode;
};
+extern const struct mtd_ooblayout_ops nand_ooblayout_sp_ops;
+extern const struct mtd_ooblayout_ops nand_ooblayout_lp_ops;
+extern const struct mtd_ooblayout_ops nand_ooblayout_lp_hamming_ops;
+
/**
* struct nand_ecc_conf - NAND ECC configuration
* @provider: ECC engine provider type
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 95b0c7114701..0c2beb6fcf0b 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1099,9 +1099,6 @@ struct nand_chip {
} manufacturer;
};
-extern const struct mtd_ooblayout_ops nand_ooblayout_sp_ops;
-extern const struct mtd_ooblayout_ops nand_ooblayout_lp_ops;
-
static inline struct nand_chip *mtd_to_nand(struct mtd_info *mtd)
{
return container_of(mtd, struct nand_chip, base.mtd);
--
2.19.1
______________________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-mtd/
[PATCH v2 12/36] mtd: nand: Move standard OOB layouts to the generic ECC core
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- Subject: [PATCH v2 12/36] mtd: nand: Move standard OOB layouts to the generic ECC core
- From: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
- Date: Mon, 4 Mar 2019 23:28:17 +0100
- Cc: Vignesh R <vigneshr@xxxxxx>, Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>, Julien Su <juliensu@xxxxxxxxxxx>, Schrempf Frieder <frieder.schrempf@xxxxxxxxxx>, Paul Cercueil <paul@xxxxxxxxxxxxxxx>, linux-mtd@xxxxxxxxxxxxxxxxxxx, Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxx>, Miquel Raynal <miquel.raynal@xxxxxxxxxxx>, Mason Yang <masonccyang@xxxxxxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
- In-reply-to: <20190304222841.13899-1-miquel.raynal@bootlin.com>
- References: <20190304222841.13899-1-miquel.raynal@bootlin.com>
- References:
- [PATCH v2 00/36] Introduce the generic ECC engine abstraction
- From: Miquel Raynal
- [PATCH v2 00/36] Introduce the generic ECC engine abstraction
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- Next by Date: [PATCH v2 08/36] mtd: rawnand: Add an invalid ECC mode to discriminate with valid ones
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