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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Richard Weinberger <richard@nod.at>,
	David Woodhouse <dwmw2@infradead.org>,
	Brian Norris <computersforpeace@gmail.com>,
	Marek Vasut <marek.vasut@gmail.com>,
	Tudor Ambarus <Tudor.Ambarus@microchip.com>,
	Vignesh Raghavendra <vigneshr@ti.com>
Cc: Tudor Ambarus <tudor.ambarus@microchip.com>,
	Julien Su <juliensu@mxic.com.tw>,
	Schrempf Frieder <frieder.schrempf@kontron.de>,
	Paul Cercueil <paul@crapouillou.net>,
	Boris Brezillon <boris.brezillon@collabora.com>,
	linux-mtd@lists.infradead.org,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Mason Yang <masonccyang@mxic.com.tw>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 17/40] mtd: nand: Move standard OOB layouts to the generic ECC core
Date: Thu, 19 Sep 2019 21:31:17 +0200
Message-ID: <20190919193141.7865-18-miquel.raynal@bootlin.com> (raw)
In-Reply-To: <20190919193141.7865-1-miquel.raynal@bootlin.com>

These OOB layouts are generic to all NAND chips, they should not be
restricted to be only used 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@bootlin.com>
---
 drivers/mtd/nand/ecc.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.c b/drivers/mtd/nand/ecc.c
index 4c7943ddf2cc..f52ffce8e684 100644
--- a/drivers/mtd/nand/ecc.c
+++ b/drivers/mtd/nand/ecc.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@bootlin.com>");
 MODULE_DESCRIPTION("Generic ECC engine");
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index b61b645dc2ef..ac478bdb7ff2 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -13,6 +13,7 @@ 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 b7977d96395a..e9ee09451685 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -34,6 +34,7 @@
 #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>
@@ -45,166 +46,6 @@
 
 #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;
@@ -5757,6 +5598,7 @@ 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 47d17a0db836..cf15074a642f 100644
--- a/drivers/mtd/nand/raw/nand_toshiba.c
+++ b/drivers/mtd/nand/raw/nand_toshiba.c
@@ -6,6 +6,8 @@
  * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
  */
 
+#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 231dc22a7c50..faa1e6a726eb 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -127,6 +127,10 @@ 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_props - NAND ECC properties
  * @provider: ECC engine provider type
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 6c9be596a2d1..818679a79743 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1156,9 +1156,6 @@ 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);
-- 
2.20.1


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  parent reply index

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-19 19:31 [PATCH v3 00/40] Introduce the generic ECC engine abstraction Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 01/40] mtd: rawnand: Avoid a typedef Miquel Raynal
2019-10-12  8:41   ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 02/40] mtd: rawnand: Add an invalid ECC mode to discriminate with valid ones Miquel Raynal
2019-10-12  8:48   ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 03/40] mtd: rawnand: Create a new enumeration to describe OOB placement Miquel Raynal
2019-10-12  9:02   ` Boris Brezillon
2019-10-12  9:07     ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 04/40] mtd: rawnand: Separate the ECC engine type and the " Miquel Raynal
2019-10-12  9:05   ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 05/40] mtd: rawnand: Create a new enumeration to describe properly ECC types Miquel Raynal
2019-10-12  9:14   ` Boris Brezillon
2019-10-12  9:55   ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 06/40] mtd: rawnand: Use the new ECC engine type enumeration Miquel Raynal
2019-10-12  9:15   ` Boris Brezillon
2019-10-12  9:17   ` Boris Brezillon
2019-10-12  9:28   ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 07/40] mtd: rawnand: Drop the legacy ECC " Miquel Raynal
2019-10-12  9:29   ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 08/40] mtd: nand: Move nand_device forward declaration to the top Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 09/40] mtd: nand: Add an extra level in the Kconfig hierarchy Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 10/40] mtd: nand: Drop useless 'depends on' in Kconfig Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 11/40] mtd: nand: Add a NAND page I/O request type Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 12/40] mtd: nand: Rename a core structure Miquel Raynal
2019-10-12  9:35   ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 13/40] mtd: nand: Add more parameters to the nand_ecc_props structure Miquel Raynal
2019-10-12  9:37   ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 14/40] mtd: nand: Introduce the ECC engine abstraction Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 15/40] mtd: nand: Convert the generic NAND layer to the generic ECC framework Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 16/40] mtd: Fix typo in mtd_ooblayout_set_databytes() description Miquel Raynal
2019-10-12 10:58   ` Boris Brezillon
2019-09-19 19:31 ` Miquel Raynal [this message]
2019-09-19 19:31 ` [PATCH v3 18/40] mtd: nand: Move ECC specific functions to the ECC core Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 19/40] mtd: nand: ecc: Turn the software BCH implementation generic Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 20/40] mtd: rawnand: Get rid of chip->ecc.priv Miquel Raynal
2019-09-20  6:18   ` Maxime Ripard
2019-09-19 19:31 ` [PATCH v3 21/40] mtd: nand: ecc: Move Hamming code to the generic NAND layer Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 22/40] mtd: nand: ecc: Clarify the software Hamming introductory line Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 23/40] mtd: nand: ecc: Turn the software Hamming implementation generic Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 24/40] mtd: nand: Remove useless include about software Hamming ECC Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 25/40] mtd: nand: ecc: Let the software Hamming ECC engine be unselected Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 26/40] mtd: nand: ecc: Create the software BCH engine instance Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 27/40] mtd: nand: ecc: Create the software Hamming " Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 28/40] mtd: nand: Let software ECC engines be retrieved from the NAND core Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 29/40] mtd: spinand: Fix typo in comment Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 30/40] mtd: spinand: Move ECC related definitions earlier in the driver Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 31/40] mtd: spinand: Instantiate a SPI-NAND on-die ECC engine Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 32/40] mtd: nand: Let on-die ECC engines be retrieved from the NAND core Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 33/40] mtd: rawnand: Fill a default ECC provider/algorithm Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 34/40] mtd: spinand: " Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 35/40] mtd: nand: Add helpers to manage ECC engines and configurations Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 36/40] mtd: spinand: Use the external ECC engine logic Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 37/40] mtd: spinand: Propagate ECC information to the MTD structure Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 38/40] mtd: spinand: Allow the case where there is no ECC engine Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 39/40] mtd: spinand: Fix OOB read Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 40/40] mtd: nand: ecc: Add infrastructure to support hardware engines Miquel Raynal

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    --cc=vigneshr@ti.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-mtd Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-mtd/0 linux-mtd/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-mtd linux-mtd/ https://lore.kernel.org/linux-mtd \
		linux-mtd@lists.infradead.org
	public-inbox-index linux-mtd

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.infradead.lists.linux-mtd


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git