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* [PATCH v13 00/20] Introduction of the generic ECC framework
@ 2020-08-27  8:51 Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 01/20] mtd: rawnand: Add a kernel doc to the ECC algorithm enumeration Miquel Raynal
                   ` (19 more replies)
  0 siblings, 20 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

This is just a rebased version of v10, except for DT pathes which have
two more versions. Nothing else changed (only resending to the ML to
avoid useless spamming).

Changes in v13:
* Rebase on top of v5.9-rc1

Changes in v11/12:
* DT Updates.

Changes in v10:
* After reworking the entire series, I only kept 4 patches aside,
  resending all of them.
* Fixed typos, updated commit logs as proposed.
* Introduced nanddev_set_ecc_requirements().
* Used spaces instead of tabs in an array.
* Renamed the nand_ecc_is_strong_enough() helper.
* Dropped the use of the MAXIMIZE flag in denali.c.
* Renamed this flag MAXIMIZE_STRENGTH.
* Renamed the of_get_nand_ecc_config*() helpers.

Changes in v9:
* This time sending the additional patchs, not just the old ones with
  corrections. v8 should be ignored, sorry for the noise.

Changes in v8:
* Split "Convert generic NAND bits to ECC framework" into several peaces:
  > added two helpers
  > converted SPI-NAND then raw-NAND.  
* Fixed a comment.
* Used the _ooblayout suffix instead of _layout.

Miquel Raynal (20):
  mtd: rawnand: Add a kernel doc to the ECC algorithm enumeration
  mtd: rawnand: Rename the ECC algorithm enumeration items
  mtd: rawnand: Move the nand_ecc_algo enum to the generic NAND layer
  mtd: nand: Add a NAND page I/O request type
  dt-bindings: mtd: Document nand-ecc-placement
  dt-bindings: mtd: Document nand-ecc-engine
  dt-bindings: mtd: Document boolean NAND ECC properties
  mtd: nand: Introduce the ECC engine framework
  mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  mtd: rawnand: Use the new ECC engine type enumeration
  mtd: nand: Create a helper to extract the ECC configuration
  mtd: spinand: Use nanddev_get_ecc_conf() when relevant
  mtd: nand: Create helpers to set/extract the ECC requirements
  mtd: rawnand: Use nanddev_get/set_ecc_requirements() when relevant
  mtd: nand: Use the new generic ECC object
  mtd: rawnand: Make use of the ECC framework
  mtd: rawnand: Use the ECC framework OOB layouts
  mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper
  mtd: rawnand: Use the ECC framework user input parsing bits
  mtd: rawnand: Use the NAND framework user_conf object for ECC flags

 .../bindings/mtd/nand-controller.yaml         |  31 +
 arch/arm/mach-davinci/board-da830-evm.c       |   2 +-
 arch/arm/mach-davinci/board-da850-evm.c       |   2 +-
 arch/arm/mach-davinci/board-dm355-evm.c       |   2 +-
 arch/arm/mach-davinci/board-dm355-leopard.c   |   3 +-
 arch/arm/mach-davinci/board-dm365-evm.c       |   2 +-
 arch/arm/mach-davinci/board-dm644x-evm.c      |   2 +-
 arch/arm/mach-davinci/board-dm646x-evm.c      |   2 +-
 arch/arm/mach-davinci/board-mityomapl138.c    |   2 +-
 arch/arm/mach-davinci/board-neuros-osd2.c     |   2 +-
 arch/arm/mach-davinci/board-omapl138-hawk.c   |   2 +-
 arch/arm/mach-s3c24xx/common-smdk.c           |   2 +-
 arch/arm/mach-s3c24xx/mach-anubis.c           |   2 +-
 arch/arm/mach-s3c24xx/mach-at2440evb.c        |   2 +-
 arch/arm/mach-s3c24xx/mach-bast.c             |   2 +-
 arch/arm/mach-s3c24xx/mach-gta02.c            |   2 +-
 arch/arm/mach-s3c24xx/mach-jive.c             |   2 +-
 arch/arm/mach-s3c24xx/mach-mini2440.c         |   2 +-
 arch/arm/mach-s3c24xx/mach-osiris.c           |   2 +-
 arch/arm/mach-s3c24xx/mach-qt2410.c           |   2 +-
 arch/arm/mach-s3c24xx/mach-rx1950.c           |   2 +-
 arch/arm/mach-s3c24xx/mach-rx3715.c           |   2 +-
 arch/arm/mach-s3c24xx/mach-vstms.c            |   2 +-
 arch/arm/mach-s3c64xx/mach-hmt.c              |   2 +-
 arch/arm/mach-s3c64xx/mach-mini6410.c         |   2 +-
 arch/arm/mach-s3c64xx/mach-real6410.c         |   2 +-
 drivers/mtd/nand/Kconfig                      |   8 +
 drivers/mtd/nand/Makefile                     |   2 +
 drivers/mtd/nand/ecc.c                        | 484 +++++++++++++++
 drivers/mtd/nand/raw/Kconfig                  |   1 +
 drivers/mtd/nand/raw/ams-delta.c              |   4 +-
 drivers/mtd/nand/raw/arasan-nand-controller.c |  16 +-
 drivers/mtd/nand/raw/atmel/nand-controller.c  |  31 +-
 drivers/mtd/nand/raw/au1550nd.c               |   4 +-
 .../mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c  |   3 +-
 drivers/mtd/nand/raw/brcmnand/brcmnand.c      |  28 +-
 .../mtd/nand/raw/cadence-nand-controller.c    |   4 +-
 drivers/mtd/nand/raw/cafe_nand.c              |   3 +-
 drivers/mtd/nand/raw/cs553x_nand.c            |   2 +-
 drivers/mtd/nand/raw/davinci_nand.c           |  38 +-
 drivers/mtd/nand/raw/denali.c                 |   3 +-
 drivers/mtd/nand/raw/denali_pci.c             |   2 +-
 drivers/mtd/nand/raw/diskonchip.c             |   3 +-
 drivers/mtd/nand/raw/fsl_elbc_nand.c          |  20 +-
 drivers/mtd/nand/raw/fsl_ifc_nand.c           |  12 +-
 drivers/mtd/nand/raw/fsl_upm.c                |   4 +-
 drivers/mtd/nand/raw/fsmc_nand.c              |  14 +-
 drivers/mtd/nand/raw/gpio.c                   |   4 +-
 drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c    |  15 +-
 drivers/mtd/nand/raw/hisi504_nand.c           |   6 +-
 .../mtd/nand/raw/ingenic/ingenic_nand_drv.c   |  20 +-
 drivers/mtd/nand/raw/lpc32xx_mlc.c            |   2 +-
 drivers/mtd/nand/raw/lpc32xx_slc.c            |   3 +-
 drivers/mtd/nand/raw/marvell_nand.c           |  35 +-
 drivers/mtd/nand/raw/meson_nand.c             |   2 +-
 drivers/mtd/nand/raw/mpc5121_nfc.c            |   4 +-
 drivers/mtd/nand/raw/mtk_nand.c               |  12 +-
 drivers/mtd/nand/raw/mxc_nand.c               |  25 +-
 drivers/mtd/nand/raw/nand_base.c              | 565 +++++++-----------
 drivers/mtd/nand/raw/nand_esmt.c              |  15 +-
 drivers/mtd/nand/raw/nand_hynix.c             |  44 +-
 drivers/mtd/nand/raw/nand_jedec.c             |   9 +-
 drivers/mtd/nand/raw/nand_micron.c            |  23 +-
 drivers/mtd/nand/raw/nand_onfi.c              |  17 +-
 drivers/mtd/nand/raw/nand_samsung.c           |  22 +-
 drivers/mtd/nand/raw/nand_toshiba.c           |  19 +-
 drivers/mtd/nand/raw/nandsim.c                |   8 +-
 drivers/mtd/nand/raw/ndfc.c                   |   2 +-
 drivers/mtd/nand/raw/omap2.c                  |  22 +-
 drivers/mtd/nand/raw/orion_nand.c             |   4 +-
 drivers/mtd/nand/raw/pasemi_nand.c            |   4 +-
 drivers/mtd/nand/raw/plat_nand.c              |   4 +-
 drivers/mtd/nand/raw/qcom_nandc.c             |   2 +-
 drivers/mtd/nand/raw/r852.c                   |   3 +-
 drivers/mtd/nand/raw/s3c2410.c                |  20 +-
 drivers/mtd/nand/raw/sh_flctl.c               |   6 +-
 drivers/mtd/nand/raw/sharpsl.c                |   2 +-
 drivers/mtd/nand/raw/socrates_nand.c          |   5 +-
 drivers/mtd/nand/raw/stm32_fmc2_nand.c        |   9 +-
 drivers/mtd/nand/raw/sunxi_nand.c             |  27 +-
 drivers/mtd/nand/raw/tango_nand.c             |   4 +-
 drivers/mtd/nand/raw/tegra_nand.c             |  37 +-
 drivers/mtd/nand/raw/tmio_nand.c              |   2 +-
 drivers/mtd/nand/raw/txx9ndfmc.c              |   2 +-
 drivers/mtd/nand/raw/vf610_nfc.c              |   6 +-
 drivers/mtd/nand/raw/xway_nand.c              |   4 +-
 drivers/mtd/nand/spi/core.c                   |  12 +-
 drivers/mtd/nand/spi/macronix.c               |   7 +-
 drivers/mtd/nand/spi/toshiba.c                |   6 +-
 include/linux/mtd/nand.h                      | 188 +++++-
 include/linux/mtd/rawnand.h                   |  34 +-
 include/linux/platform_data/mtd-davinci.h     |   9 +-
 .../linux/platform_data/mtd-nand-s3c2410.h    |   2 +-
 93 files changed, 1318 insertions(+), 723 deletions(-)
 create mode 100644 drivers/mtd/nand/ecc.c

-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 01/20] mtd: rawnand: Add a kernel doc to the ECC algorithm enumeration
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:25   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 02/20] mtd: rawnand: Rename the ECC algorithm enumeration items Miquel Raynal
                   ` (18 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Before moving it to the generic raw NAND core, ensure the enumeration
is properly described.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
 include/linux/mtd/rawnand.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index a725b620aca2..1495f22b60cb 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -92,6 +92,13 @@ enum nand_ecc_mode {
 	NAND_ECC_ON_DIE,
 };
 
+/**
+ * enum nand_ecc_algo - NAND ECC algorithm
+ * @NAND_ECC_UNKNOWN: Unknown algorithm
+ * @NAND_ECC_HAMMING: Hamming algorithm
+ * @NAND_ECC_BCH: Bose-Chaudhuri-Hocquenghem algorithm
+ * @NAND_ECC_RS: Reed-Solomon algorithm
+ */
 enum nand_ecc_algo {
 	NAND_ECC_UNKNOWN,
 	NAND_ECC_HAMMING,
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 02/20] mtd: rawnand: Rename the ECC algorithm enumeration items
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 01/20] mtd: rawnand: Add a kernel doc to the ECC algorithm enumeration Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:25   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 03/20] mtd: rawnand: Move the nand_ecc_algo enum to the generic NAND layer Miquel Raynal
                   ` (17 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

NAND_ECC_ is not a meaningful prefix, use NAND_ECC_ALGO_ instead.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
 drivers/mtd/nand/raw/ams-delta.c              |  2 +-
 drivers/mtd/nand/raw/arasan-nand-controller.c |  2 +-
 drivers/mtd/nand/raw/atmel/nand-controller.c  |  2 +-
 drivers/mtd/nand/raw/au1550nd.c               |  2 +-
 drivers/mtd/nand/raw/brcmnand/brcmnand.c      | 12 ++++-----
 drivers/mtd/nand/raw/davinci_nand.c           |  8 +++---
 drivers/mtd/nand/raw/fsl_elbc_nand.c          |  2 +-
 drivers/mtd/nand/raw/fsl_ifc_nand.c           |  2 +-
 drivers/mtd/nand/raw/fsl_upm.c                |  2 +-
 drivers/mtd/nand/raw/fsmc_nand.c              |  2 +-
 drivers/mtd/nand/raw/gpio.c                   |  2 +-
 drivers/mtd/nand/raw/marvell_nand.c           | 10 +++----
 drivers/mtd/nand/raw/mpc5121_nfc.c            |  2 +-
 drivers/mtd/nand/raw/mxc_nand.c               |  2 +-
 drivers/mtd/nand/raw/nand_base.c              | 26 +++++++++----------
 drivers/mtd/nand/raw/nand_micron.c            |  2 +-
 drivers/mtd/nand/raw/nandsim.c                |  4 +--
 drivers/mtd/nand/raw/omap2.c                  |  2 +-
 drivers/mtd/nand/raw/orion_nand.c             |  2 +-
 drivers/mtd/nand/raw/pasemi_nand.c            |  2 +-
 drivers/mtd/nand/raw/plat_nand.c              |  2 +-
 drivers/mtd/nand/raw/s3c2410.c                |  4 +--
 drivers/mtd/nand/raw/sh_flctl.c               |  2 +-
 drivers/mtd/nand/raw/socrates_nand.c          |  2 +-
 drivers/mtd/nand/raw/tango_nand.c             |  2 +-
 drivers/mtd/nand/raw/tegra_nand.c             | 20 +++++++-------
 drivers/mtd/nand/raw/xway_nand.c              |  2 +-
 include/linux/mtd/rawnand.h                   | 16 ++++++------
 28 files changed, 70 insertions(+), 70 deletions(-)

diff --git a/drivers/mtd/nand/raw/ams-delta.c b/drivers/mtd/nand/raw/ams-delta.c
index fdba155416d2..21199d9ae9be 100644
--- a/drivers/mtd/nand/raw/ams-delta.c
+++ b/drivers/mtd/nand/raw/ams-delta.c
@@ -261,7 +261,7 @@ static int gpio_nand_probe(struct platform_device *pdev)
 	}
 
 	this->ecc.mode = NAND_ECC_SOFT;
-	this->ecc.algo = NAND_ECC_HAMMING;
+	this->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	platform_set_drvdata(pdev, priv);
 
diff --git a/drivers/mtd/nand/raw/arasan-nand-controller.c b/drivers/mtd/nand/raw/arasan-nand-controller.c
index 12c643e97c85..b0616a95340d 100644
--- a/drivers/mtd/nand/raw/arasan-nand-controller.c
+++ b/drivers/mtd/nand/raw/arasan-nand-controller.c
@@ -983,7 +983,7 @@ static int anfc_init_hw_ecc_controller(struct arasan_nfc *nfc,
 	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
 
 	ecc->steps = mtd->writesize / ecc->size;
-	ecc->algo = NAND_ECC_BCH;
+	ecc->algo = NAND_ECC_ALGO_BCH;
 	anand->ecc_bits = bch_gf_mag * ecc->strength;
 	ecc->bytes = DIV_ROUND_UP(anand->ecc_bits, 8);
 	anand->ecc_total = DIV_ROUND_UP(anand->ecc_bits * ecc->steps, 8);
diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index c9818f548d07..8999571bfa5d 100644
--- a/drivers/mtd/nand/raw/atmel/nand-controller.c
+++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
@@ -1099,7 +1099,7 @@ static int atmel_nand_pmecc_init(struct nand_chip *chip)
 	if (IS_ERR(nand->pmecc))
 		return PTR_ERR(nand->pmecc);
 
-	chip->ecc.algo = NAND_ECC_BCH;
+	chip->ecc.algo = NAND_ECC_ALGO_BCH;
 	chip->ecc.size = req.ecc.sectorsize;
 	chip->ecc.bytes = req.ecc.bytes / req.ecc.nsectors;
 	chip->ecc.strength = req.ecc.strength;
diff --git a/drivers/mtd/nand/raw/au1550nd.c b/drivers/mtd/nand/raw/au1550nd.c
index d865200ccd08..ec2d90ad87de 100644
--- a/drivers/mtd/nand/raw/au1550nd.c
+++ b/drivers/mtd/nand/raw/au1550nd.c
@@ -295,7 +295,7 @@ static int au1550nd_probe(struct platform_device *pdev)
 	ctx->controller.ops = &au1550nd_ops;
 	this->controller = &ctx->controller;
 	this->ecc.mode = NAND_ECC_SOFT;
-	this->ecc.algo = NAND_ECC_HAMMING;
+	this->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	if (pd->devwidth)
 		this->options |= NAND_BUSWIDTH_16;
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
index a4033d32a710..39f1bf327592 100644
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -2571,17 +2571,17 @@ static int brcmnand_setup_dev(struct brcmnand_host *host)
 		return -EINVAL;
 	}
 
-	if (chip->ecc.algo == NAND_ECC_UNKNOWN) {
+	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN) {
 		if (chip->ecc.strength == 1 && chip->ecc.size == 512)
 			/* Default to Hamming for 1-bit ECC, if unspecified */
-			chip->ecc.algo = NAND_ECC_HAMMING;
+			chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		else
 			/* Otherwise, BCH */
-			chip->ecc.algo = NAND_ECC_BCH;
+			chip->ecc.algo = NAND_ECC_ALGO_BCH;
 	}
 
-	if (chip->ecc.algo == NAND_ECC_HAMMING && (chip->ecc.strength != 1 ||
-						   chip->ecc.size != 512)) {
+	if (chip->ecc.algo == NAND_ECC_ALGO_HAMMING &&
+	    (chip->ecc.strength != 1 || chip->ecc.size != 512)) {
 		dev_err(ctrl->dev, "invalid Hamming params: %d bits per %d bytes\n",
 			chip->ecc.strength, chip->ecc.size);
 		return -EINVAL;
@@ -2600,7 +2600,7 @@ static int brcmnand_setup_dev(struct brcmnand_host *host)
 
 	switch (chip->ecc.size) {
 	case 512:
-		if (chip->ecc.algo == NAND_ECC_HAMMING)
+		if (chip->ecc.algo == NAND_ECC_ALGO_HAMMING)
 			cfg->ecc_level = 15;
 		else
 			cfg->ecc_level = chip->ecc.strength;
diff --git a/drivers/mtd/nand/raw/davinci_nand.c b/drivers/mtd/nand/raw/davinci_nand.c
index d975a62caaa5..551515c223bb 100644
--- a/drivers/mtd/nand/raw/davinci_nand.c
+++ b/drivers/mtd/nand/raw/davinci_nand.c
@@ -593,11 +593,11 @@ static int davinci_nand_attach_chip(struct nand_chip *chip)
 		pdata->ecc_bits = 0;
 		/*
 		 * This driver expects Hamming based ECC when ecc_mode is set
-		 * to NAND_ECC_SOFT. Force ecc.algo to NAND_ECC_HAMMING to
+		 * to NAND_ECC_SOFT. Force ecc.algo to NAND_ECC_ALGO_HAMMING to
 		 * avoid adding an extra ->ecc_algo field to
 		 * davinci_nand_pdata.
 		 */
-		info->chip.ecc.algo = NAND_ECC_HAMMING;
+		info->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 		break;
 	case NAND_ECC_HW:
 		if (pdata->ecc_bits == 4) {
@@ -629,7 +629,7 @@ static int davinci_nand_attach_chip(struct nand_chip *chip)
 			info->chip.ecc.hwctl = nand_davinci_hwctl_4bit;
 			info->chip.ecc.bytes = 10;
 			info->chip.ecc.options = NAND_ECC_GENERIC_ERASED_CHECK;
-			info->chip.ecc.algo = NAND_ECC_BCH;
+			info->chip.ecc.algo = NAND_ECC_ALGO_BCH;
 
 			/*
 			 * Update ECC layout if needed ... for 1-bit HW ECC, the
@@ -656,7 +656,7 @@ static int davinci_nand_attach_chip(struct nand_chip *chip)
 			info->chip.ecc.correct = nand_davinci_correct_1bit;
 			info->chip.ecc.hwctl = nand_davinci_hwctl_1bit;
 			info->chip.ecc.bytes = 3;
-			info->chip.ecc.algo = NAND_ECC_HAMMING;
+			info->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 		}
 		info->chip.ecc.size = 512;
 		info->chip.ecc.strength = pdata->ecc_bits;
diff --git a/drivers/mtd/nand/raw/fsl_elbc_nand.c b/drivers/mtd/nand/raw/fsl_elbc_nand.c
index 088692b2e27a..da89389faaae 100644
--- a/drivers/mtd/nand/raw/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_elbc_nand.c
@@ -748,7 +748,7 @@ static int fsl_elbc_attach_chip(struct nand_chip *chip)
 		} else {
 			/* otherwise fall back to default software ECC */
 			chip->ecc.mode = NAND_ECC_SOFT;
-			chip->ecc.algo = NAND_ECC_HAMMING;
+			chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		}
 		break;
 
diff --git a/drivers/mtd/nand/raw/fsl_ifc_nand.c b/drivers/mtd/nand/raw/fsl_ifc_nand.c
index 00ae7a910b03..b2ae759dd14e 100644
--- a/drivers/mtd/nand/raw/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_ifc_nand.c
@@ -926,7 +926,7 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
 		}
 	} else {
 		chip->ecc.mode = NAND_ECC_SOFT;
-		chip->ecc.algo = NAND_ECC_HAMMING;
+		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 	}
 
 	ret = fsl_ifc_sram_init(priv);
diff --git a/drivers/mtd/nand/raw/fsl_upm.c b/drivers/mtd/nand/raw/fsl_upm.c
index 197850aeb261..04cf7d14082a 100644
--- a/drivers/mtd/nand/raw/fsl_upm.c
+++ b/drivers/mtd/nand/raw/fsl_upm.c
@@ -48,7 +48,7 @@ static int fun_chip_init(struct fsl_upm_nand *fun,
 	struct device_node *flash_np;
 
 	fun->chip.ecc.mode = NAND_ECC_SOFT;
-	fun->chip.ecc.algo = NAND_ECC_HAMMING;
+	fun->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 	fun->chip.controller = &fun->base;
 	mtd->dev.parent = fun->dev;
 
diff --git a/drivers/mtd/nand/raw/fsmc_nand.c b/drivers/mtd/nand/raw/fsmc_nand.c
index 92ddc41d0ff0..580b9fe8ca42 100644
--- a/drivers/mtd/nand/raw/fsmc_nand.c
+++ b/drivers/mtd/nand/raw/fsmc_nand.c
@@ -911,7 +911,7 @@ static int fsmc_nand_attach_chip(struct nand_chip *nand)
 		break;
 
 	case NAND_ECC_SOFT:
-		if (nand->ecc.algo == NAND_ECC_BCH) {
+		if (nand->ecc.algo == NAND_ECC_ALGO_BCH) {
 			dev_info(host->dev,
 				 "Using 4-bit SW BCH ECC scheme\n");
 			break;
diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index 3bd847ccc3f3..c8f498eaabeb 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -343,7 +343,7 @@ static int gpio_nand_probe(struct platform_device *pdev)
 
 	nand_set_flash_node(chip, pdev->dev.of_node);
 	chip->ecc.mode		= NAND_ECC_SOFT;
-	chip->ecc.algo		= NAND_ECC_HAMMING;
+	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
 	chip->options		= gpiomtd->plat.options;
 	chip->controller	= &gpiomtd->base;
 
diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c
index 8482d3bd8b1f..b2200aa787f2 100644
--- a/drivers/mtd/nand/raw/marvell_nand.c
+++ b/drivers/mtd/nand/raw/marvell_nand.c
@@ -780,7 +780,7 @@ static void marvell_nfc_enable_hw_ecc(struct nand_chip *chip)
 		 * When enabling BCH, set threshold to 0 to always know the
 		 * number of corrected bitflips.
 		 */
-		if (chip->ecc.algo == NAND_ECC_BCH)
+		if (chip->ecc.algo == NAND_ECC_ALGO_BCH)
 			writel_relaxed(NDECCCTRL_BCH_EN, nfc->regs + NDECCCTRL);
 	}
 }
@@ -792,7 +792,7 @@ static void marvell_nfc_disable_hw_ecc(struct nand_chip *chip)
 
 	if (ndcr & NDCR_ECC_EN) {
 		writel_relaxed(ndcr & ~NDCR_ECC_EN, nfc->regs + NDCR);
-		if (chip->ecc.algo == NAND_ECC_BCH)
+		if (chip->ecc.algo == NAND_ECC_ALGO_BCH)
 			writel_relaxed(0, nfc->regs + NDECCCTRL);
 	}
 }
@@ -966,7 +966,7 @@ static int marvell_nfc_hw_ecc_check_bitflips(struct nand_chip *chip,
 	if (ndsr & NDSR_CORERR) {
 		writel_relaxed(ndsr, nfc->regs + NDSR);
 
-		if (chip->ecc.algo == NAND_ECC_BCH)
+		if (chip->ecc.algo == NAND_ECC_ALGO_BCH)
 			bf = NDSR_ERRCNT(ndsr);
 		else
 			bf = 1;
@@ -2218,7 +2218,7 @@ static int marvell_nand_hw_ecc_controller_init(struct mtd_info *mtd,
 	ecc->size = l->data_bytes;
 
 	if (ecc->strength == 1) {
-		chip->ecc.algo = NAND_ECC_HAMMING;
+		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		ecc->read_page_raw = marvell_nfc_hw_ecc_hmg_read_page_raw;
 		ecc->read_page = marvell_nfc_hw_ecc_hmg_read_page;
 		ecc->read_oob_raw = marvell_nfc_hw_ecc_hmg_read_oob_raw;
@@ -2228,7 +2228,7 @@ static int marvell_nand_hw_ecc_controller_init(struct mtd_info *mtd,
 		ecc->write_oob_raw = marvell_nfc_hw_ecc_hmg_write_oob_raw;
 		ecc->write_oob = ecc->write_oob_raw;
 	} else {
-		chip->ecc.algo = NAND_ECC_BCH;
+		chip->ecc.algo = NAND_ECC_ALGO_BCH;
 		ecc->strength = 16;
 		ecc->read_page_raw = marvell_nfc_hw_ecc_bch_read_page_raw;
 		ecc->read_page = marvell_nfc_hw_ecc_bch_read_page;
diff --git a/drivers/mtd/nand/raw/mpc5121_nfc.c b/drivers/mtd/nand/raw/mpc5121_nfc.c
index 18ecb096a32d..a67eded226db 100644
--- a/drivers/mtd/nand/raw/mpc5121_nfc.c
+++ b/drivers/mtd/nand/raw/mpc5121_nfc.c
@@ -689,7 +689,7 @@ static int mpc5121_nfc_probe(struct platform_device *op)
 	chip->legacy.get_features = nand_get_set_features_notsupp;
 	chip->bbt_options = NAND_BBT_USE_FLASH;
 	chip->ecc.mode = NAND_ECC_SOFT;
-	chip->ecc.algo = NAND_ECC_HAMMING;
+	chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	/* Support external chip-select logic on ADS5121 board */
 	if (of_machine_is_compatible("fsl,mpc5121ads")) {
diff --git a/drivers/mtd/nand/raw/mxc_nand.c b/drivers/mtd/nand/raw/mxc_nand.c
index a043d76b48cb..65448fb223b8 100644
--- a/drivers/mtd/nand/raw/mxc_nand.c
+++ b/drivers/mtd/nand/raw/mxc_nand.c
@@ -1846,7 +1846,7 @@ static int mxcnd_probe(struct platform_device *pdev)
 		this->ecc.mode = NAND_ECC_HW;
 	} else {
 		this->ecc.mode = NAND_ECC_SOFT;
-		this->ecc.algo = NAND_ECC_HAMMING;
+		this->ecc.algo = NAND_ECC_ALGO_HAMMING;
 	}
 
 	/* NAND bus width determines access functions used by upper layer */
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 8086545299c0..1d403b439850 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5071,9 +5071,9 @@ static int of_get_nand_ecc_mode(struct device_node *np)
 }
 
 static const char * const nand_ecc_algos[] = {
-	[NAND_ECC_HAMMING]	= "hamming",
-	[NAND_ECC_BCH]		= "bch",
-	[NAND_ECC_RS]		= "rs",
+	[NAND_ECC_ALGO_HAMMING]	= "hamming",
+	[NAND_ECC_ALGO_BCH]	= "bch",
+	[NAND_ECC_ALGO_RS]	= "rs",
 };
 
 static enum nand_ecc_algo of_get_nand_ecc_algo(struct device_node *np)
@@ -5084,7 +5084,7 @@ static enum nand_ecc_algo of_get_nand_ecc_algo(struct device_node *np)
 
 	err = of_property_read_string(np, "nand-ecc-algo", &pm);
 	if (!err) {
-		for (ecc_algo = NAND_ECC_HAMMING;
+		for (ecc_algo = NAND_ECC_ALGO_HAMMING;
 		     ecc_algo < ARRAY_SIZE(nand_ecc_algos);
 		     ecc_algo++) {
 			if (!strcasecmp(pm, nand_ecc_algos[ecc_algo]))
@@ -5099,12 +5099,12 @@ static enum nand_ecc_algo of_get_nand_ecc_algo(struct device_node *np)
 	err = of_property_read_string(np, "nand-ecc-mode", &pm);
 	if (!err) {
 		if (!strcasecmp(pm, "soft"))
-			return NAND_ECC_HAMMING;
+			return NAND_ECC_ALGO_HAMMING;
 		else if (!strcasecmp(pm, "soft_bch"))
-			return NAND_ECC_BCH;
+			return NAND_ECC_ALGO_BCH;
 	}
 
-	return NAND_ECC_UNKNOWN;
+	return NAND_ECC_ALGO_UNKNOWN;
 }
 
 static int of_get_nand_ecc_step_size(struct device_node *np)
@@ -5172,7 +5172,7 @@ static int nand_dt_init(struct nand_chip *chip)
 	if (ecc_mode >= 0)
 		chip->ecc.mode = ecc_mode;
 
-	if (ecc_algo != NAND_ECC_UNKNOWN)
+	if (ecc_algo != NAND_ECC_ALGO_UNKNOWN)
 		chip->ecc.algo = ecc_algo;
 
 	if (ecc_strength >= 0)
@@ -5296,7 +5296,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 		return -EINVAL;
 
 	switch (ecc->algo) {
-	case NAND_ECC_HAMMING:
+	case NAND_ECC_ALGO_HAMMING:
 		ecc->calculate = nand_calculate_ecc;
 		ecc->correct = nand_correct_data;
 		ecc->read_page = nand_read_page_swecc;
@@ -5317,7 +5317,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 			ecc->options |= NAND_ECC_SOFT_HAMMING_SM_ORDER;
 
 		return 0;
-	case NAND_ECC_BCH:
+	case NAND_ECC_ALGO_BCH:
 		if (!mtd_nand_has_bch()) {
 			WARN(1, "CONFIG_MTD_NAND_ECC_SW_BCH not enabled\n");
 			return -EINVAL;
@@ -5757,7 +5757,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 	 * If no default placement scheme is given, select an appropriate one.
 	 */
 	if (!mtd->ooblayout &&
-	    !(ecc->mode == NAND_ECC_SOFT && ecc->algo == NAND_ECC_BCH)) {
+	    !(ecc->mode == NAND_ECC_SOFT && ecc->algo == NAND_ECC_ALGO_BCH)) {
 		switch (mtd->oobsize) {
 		case 8:
 		case 16:
@@ -5848,7 +5848,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 		pr_warn("%d byte HW ECC not possible on %d byte page size, fallback to SW ECC\n",
 			ecc->size, mtd->writesize);
 		ecc->mode = NAND_ECC_SOFT;
-		ecc->algo = NAND_ECC_HAMMING;
+		ecc->algo = NAND_ECC_ALGO_HAMMING;
 		fallthrough;
 	case NAND_ECC_SOFT:
 		ret = nand_set_ecc_soft_ops(chip);
@@ -6107,7 +6107,7 @@ EXPORT_SYMBOL(nand_scan_with_ids);
 void nand_cleanup(struct nand_chip *chip)
 {
 	if (chip->ecc.mode == NAND_ECC_SOFT &&
-	    chip->ecc.algo == NAND_ECC_BCH)
+	    chip->ecc.algo == NAND_ECC_ALGO_BCH)
 		nand_bch_free((struct nand_bch_control *)chip->ecc.priv);
 
 	nanddev_cleanup(&chip->base);
diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
index 4385092a9325..2d54a3aa15b1 100644
--- a/drivers/mtd/nand/raw/nand_micron.c
+++ b/drivers/mtd/nand/raw/nand_micron.c
@@ -543,7 +543,7 @@ static int micron_nand_init(struct nand_chip *chip)
 		chip->ecc.bytes = chip->base.eccreq.strength * 2;
 		chip->ecc.size = 512;
 		chip->ecc.strength = chip->base.eccreq.strength;
-		chip->ecc.algo = NAND_ECC_BCH;
+		chip->ecc.algo = NAND_ECC_ALGO_BCH;
 		chip->ecc.read_page = micron_nand_read_page_on_die_ecc;
 		chip->ecc.write_page = micron_nand_write_page_on_die_ecc;
 
diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c
index f5a53aac3c5f..1ab849ccaa96 100644
--- a/drivers/mtd/nand/raw/nandsim.c
+++ b/drivers/mtd/nand/raw/nandsim.c
@@ -2235,7 +2235,7 @@ static int ns_attach_chip(struct nand_chip *chip)
 	}
 
 	chip->ecc.mode = NAND_ECC_SOFT;
-	chip->ecc.algo = NAND_ECC_BCH;
+	chip->ecc.algo = NAND_ECC_ALGO_BCH;
 	chip->ecc.size = 512;
 	chip->ecc.strength = bch;
 	chip->ecc.bytes = eccbytes;
@@ -2275,7 +2275,7 @@ static int __init ns_init_module(void)
 	nand_set_controller_data(chip, (void *)ns);
 
 	chip->ecc.mode   = NAND_ECC_SOFT;
-	chip->ecc.algo   = NAND_ECC_HAMMING;
+	chip->ecc.algo   = NAND_ECC_ALGO_HAMMING;
 	/* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */
 	/* and 'badblocks' parameters to work */
 	chip->options   |= NAND_SKIP_BBTSCAN;
diff --git a/drivers/mtd/nand/raw/omap2.c b/drivers/mtd/nand/raw/omap2.c
index eb7fcfd9276b..967ddbda1c48 100644
--- a/drivers/mtd/nand/raw/omap2.c
+++ b/drivers/mtd/nand/raw/omap2.c
@@ -2011,7 +2011,7 @@ static int omap_nand_attach_chip(struct nand_chip *chip)
 	 */
 	if (info->ecc_opt == OMAP_ECC_HAM1_CODE_SW) {
 		chip->ecc.mode = NAND_ECC_SOFT;
-		chip->ecc.algo = NAND_ECC_HAMMING;
+		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		return 0;
 	}
 
diff --git a/drivers/mtd/nand/raw/orion_nand.c b/drivers/mtd/nand/raw/orion_nand.c
index 880b54ca1b41..7a5cfa3d883f 100644
--- a/drivers/mtd/nand/raw/orion_nand.c
+++ b/drivers/mtd/nand/raw/orion_nand.c
@@ -140,7 +140,7 @@ static int __init orion_nand_probe(struct platform_device *pdev)
 	nc->legacy.cmd_ctrl = orion_nand_cmd_ctrl;
 	nc->legacy.read_buf = orion_nand_read_buf;
 	nc->ecc.mode = NAND_ECC_SOFT;
-	nc->ecc.algo = NAND_ECC_HAMMING;
+	nc->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	if (board->chip_delay)
 		nc->legacy.chip_delay = board->chip_delay;
diff --git a/drivers/mtd/nand/raw/pasemi_nand.c b/drivers/mtd/nand/raw/pasemi_nand.c
index d8eca8c3fdcd..3eddc284614d 100644
--- a/drivers/mtd/nand/raw/pasemi_nand.c
+++ b/drivers/mtd/nand/raw/pasemi_nand.c
@@ -133,7 +133,7 @@ static int pasemi_nand_probe(struct platform_device *ofdev)
 	chip->legacy.write_buf = pasemi_write_buf;
 	chip->legacy.chip_delay = 0;
 	chip->ecc.mode = NAND_ECC_SOFT;
-	chip->ecc.algo = NAND_ECC_HAMMING;
+	chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	/* Enable the following for a flash based bad block table */
 	chip->bbt_options = NAND_BBT_USE_FLASH;
diff --git a/drivers/mtd/nand/raw/plat_nand.c b/drivers/mtd/nand/raw/plat_nand.c
index 556182f26057..dbc089c8872f 100644
--- a/drivers/mtd/nand/raw/plat_nand.c
+++ b/drivers/mtd/nand/raw/plat_nand.c
@@ -67,7 +67,7 @@ static int plat_nand_probe(struct platform_device *pdev)
 	data->chip.bbt_options |= pdata->chip.bbt_options;
 
 	data->chip.ecc.mode = NAND_ECC_SOFT;
-	data->chip.ecc.algo = NAND_ECC_HAMMING;
+	data->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	platform_set_drvdata(pdev, data);
 
diff --git a/drivers/mtd/nand/raw/s3c2410.c b/drivers/mtd/nand/raw/s3c2410.c
index 105522205979..5a39002d67ef 100644
--- a/drivers/mtd/nand/raw/s3c2410.c
+++ b/drivers/mtd/nand/raw/s3c2410.c
@@ -938,11 +938,11 @@ static int s3c2410_nand_attach_chip(struct nand_chip *chip)
 	case NAND_ECC_SOFT:
 		/*
 		 * This driver expects Hamming based ECC when ecc_mode is set
-		 * to NAND_ECC_SOFT. Force ecc.algo to NAND_ECC_HAMMING to
+		 * to NAND_ECC_SOFT. Force ecc.algo to NAND_ECC_ALGO_HAMMING to
 		 * avoid adding an extra ecc_algo field to
 		 * s3c2410_platform_nand.
 		 */
-		chip->ecc.algo = NAND_ECC_HAMMING;
+		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		dev_info(info->device, "soft ECC\n");
 		break;
 
diff --git a/drivers/mtd/nand/raw/sh_flctl.c b/drivers/mtd/nand/raw/sh_flctl.c
index a661b8bb2dd5..9dbd6fdbe264 100644
--- a/drivers/mtd/nand/raw/sh_flctl.c
+++ b/drivers/mtd/nand/raw/sh_flctl.c
@@ -1045,7 +1045,7 @@ static int flctl_chip_attach_chip(struct nand_chip *chip)
 		flctl->flcmncr_base |= _4ECCEN;
 	} else {
 		chip->ecc.mode = NAND_ECC_SOFT;
-		chip->ecc.algo = NAND_ECC_HAMMING;
+		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 	}
 
 	return 0;
diff --git a/drivers/mtd/nand/raw/socrates_nand.c b/drivers/mtd/nand/raw/socrates_nand.c
index 243b34cfbc1b..72a3a7f98282 100644
--- a/drivers/mtd/nand/raw/socrates_nand.c
+++ b/drivers/mtd/nand/raw/socrates_nand.c
@@ -154,7 +154,7 @@ static int socrates_nand_probe(struct platform_device *ofdev)
 	nand_chip->legacy.dev_ready = socrates_nand_device_ready;
 
 	nand_chip->ecc.mode = NAND_ECC_SOFT;	/* enable ECC */
-	nand_chip->ecc.algo = NAND_ECC_HAMMING;
+	nand_chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	/* TODO: I have no idea what real delay is. */
 	nand_chip->legacy.chip_delay = 20;	/* 20us command delay time */
diff --git a/drivers/mtd/nand/raw/tango_nand.c b/drivers/mtd/nand/raw/tango_nand.c
index bdb965ae7a4a..021ceef4ad0a 100644
--- a/drivers/mtd/nand/raw/tango_nand.c
+++ b/drivers/mtd/nand/raw/tango_nand.c
@@ -550,7 +550,7 @@ static int tango_attach_chip(struct nand_chip *chip)
 	struct nand_ecc_ctrl *ecc = &chip->ecc;
 
 	ecc->mode = NAND_ECC_HW;
-	ecc->algo = NAND_ECC_BCH;
+	ecc->algo = NAND_ECC_ALGO_BCH;
 	ecc->bytes = DIV_ROUND_UP(ecc->strength * FIELD_ORDER, BITS_PER_BYTE);
 
 	ecc->read_page_raw = tango_read_page_raw;
diff --git a/drivers/mtd/nand/raw/tegra_nand.c b/drivers/mtd/nand/raw/tegra_nand.c
index 6b6212ffa01c..0d6f3c6d6e11 100644
--- a/drivers/mtd/nand/raw/tegra_nand.c
+++ b/drivers/mtd/nand/raw/tegra_nand.c
@@ -479,7 +479,7 @@ static void tegra_nand_hw_ecc(struct tegra_nand_controller *ctrl,
 {
 	struct tegra_nand_chip *nand = to_tegra_chip(chip);
 
-	if (chip->ecc.algo == NAND_ECC_BCH && enable)
+	if (chip->ecc.algo == NAND_ECC_ALGO_BCH && enable)
 		writel_relaxed(nand->bch_config, ctrl->regs + BCH_CONFIG);
 	else
 		writel_relaxed(0, ctrl->regs + BCH_CONFIG);
@@ -877,7 +877,7 @@ static int tegra_nand_select_strength(struct nand_chip *chip, int oobsize)
 	int strength_len, bits_per_step;
 
 	switch (chip->ecc.algo) {
-	case NAND_ECC_RS:
+	case NAND_ECC_ALGO_RS:
 		bits_per_step = BITS_PER_STEP_RS;
 		if (chip->options & NAND_IS_BOOT_MEDIUM) {
 			strength = rs_strength_bootable;
@@ -887,7 +887,7 @@ static int tegra_nand_select_strength(struct nand_chip *chip, int oobsize)
 			strength_len = ARRAY_SIZE(rs_strength);
 		}
 		break;
-	case NAND_ECC_BCH:
+	case NAND_ECC_ALGO_BCH:
 		bits_per_step = BITS_PER_STEP_BCH;
 		if (chip->options & NAND_IS_BOOT_MEDIUM) {
 			strength = bch_strength_bootable;
@@ -935,14 +935,14 @@ static int tegra_nand_attach_chip(struct nand_chip *chip)
 	if (chip->options & NAND_BUSWIDTH_16)
 		nand->config |= CONFIG_BUS_WIDTH_16;
 
-	if (chip->ecc.algo == NAND_ECC_UNKNOWN) {
+	if (chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN) {
 		if (mtd->writesize < 2048)
-			chip->ecc.algo = NAND_ECC_RS;
+			chip->ecc.algo = NAND_ECC_ALGO_RS;
 		else
-			chip->ecc.algo = NAND_ECC_BCH;
+			chip->ecc.algo = NAND_ECC_ALGO_BCH;
 	}
 
-	if (chip->ecc.algo == NAND_ECC_BCH && mtd->writesize < 2048) {
+	if (chip->ecc.algo == NAND_ECC_ALGO_BCH && mtd->writesize < 2048) {
 		dev_err(ctrl->dev, "BCH supports 2K or 4K page size only\n");
 		return -EINVAL;
 	}
@@ -963,7 +963,7 @@ static int tegra_nand_attach_chip(struct nand_chip *chip)
 			   CONFIG_SKIP_SPARE_SIZE_4;
 
 	switch (chip->ecc.algo) {
-	case NAND_ECC_RS:
+	case NAND_ECC_ALGO_RS:
 		bits_per_step = BITS_PER_STEP_RS * chip->ecc.strength;
 		mtd_set_ooblayout(mtd, &tegra_nand_oob_rs_ops);
 		nand->config_ecc |= CONFIG_HW_ECC | CONFIG_ECC_SEL |
@@ -984,7 +984,7 @@ static int tegra_nand_attach_chip(struct nand_chip *chip)
 			return -EINVAL;
 		}
 		break;
-	case NAND_ECC_BCH:
+	case NAND_ECC_ALGO_BCH:
 		bits_per_step = BITS_PER_STEP_BCH * chip->ecc.strength;
 		mtd_set_ooblayout(mtd, &tegra_nand_oob_bch_ops);
 		nand->bch_config = BCH_ENABLE;
@@ -1013,7 +1013,7 @@ static int tegra_nand_attach_chip(struct nand_chip *chip)
 	}
 
 	dev_info(ctrl->dev, "Using %s with strength %d per 512 byte step\n",
-		 chip->ecc.algo == NAND_ECC_BCH ? "BCH" : "RS",
+		 chip->ecc.algo == NAND_ECC_ALGO_BCH ? "BCH" : "RS",
 		 chip->ecc.strength);
 
 	chip->ecc.bytes = DIV_ROUND_UP(bits_per_step, BITS_PER_BYTE);
diff --git a/drivers/mtd/nand/raw/xway_nand.c b/drivers/mtd/nand/raw/xway_nand.c
index 29255476afdb..b279ed143b8f 100644
--- a/drivers/mtd/nand/raw/xway_nand.c
+++ b/drivers/mtd/nand/raw/xway_nand.c
@@ -181,7 +181,7 @@ static int xway_nand_probe(struct platform_device *pdev)
 	data->chip.legacy.chip_delay = 30;
 
 	data->chip.ecc.mode = NAND_ECC_SOFT;
-	data->chip.ecc.algo = NAND_ECC_HAMMING;
+	data->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	platform_set_drvdata(pdev, data);
 	nand_set_controller_data(&data->chip, data);
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 1495f22b60cb..8174c0c331a1 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -94,16 +94,16 @@ enum nand_ecc_mode {
 
 /**
  * enum nand_ecc_algo - NAND ECC algorithm
- * @NAND_ECC_UNKNOWN: Unknown algorithm
- * @NAND_ECC_HAMMING: Hamming algorithm
- * @NAND_ECC_BCH: Bose-Chaudhuri-Hocquenghem algorithm
- * @NAND_ECC_RS: Reed-Solomon algorithm
+ * @NAND_ECC_ALGO_UNKNOWN: Unknown algorithm
+ * @NAND_ECC_ALGO_HAMMING: Hamming algorithm
+ * @NAND_ECC_ALGO_BCH: Bose-Chaudhuri-Hocquenghem algorithm
+ * @NAND_ECC_ALGO_RS: Reed-Solomon algorithm
  */
 enum nand_ecc_algo {
-	NAND_ECC_UNKNOWN,
-	NAND_ECC_HAMMING,
-	NAND_ECC_BCH,
-	NAND_ECC_RS,
+	NAND_ECC_ALGO_UNKNOWN,
+	NAND_ECC_ALGO_HAMMING,
+	NAND_ECC_ALGO_BCH,
+	NAND_ECC_ALGO_RS,
 };
 
 /*
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 03/20] mtd: rawnand: Move the nand_ecc_algo enum to the generic NAND layer
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 01/20] mtd: rawnand: Add a kernel doc to the ECC algorithm enumeration Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 02/20] mtd: rawnand: Rename the ECC algorithm enumeration items Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 04/20] mtd: nand: Add a NAND page I/O request type Miquel Raynal
                   ` (16 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

This enumeration is generic and will be reused NAND-wide.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 include/linux/mtd/nand.h    | 14 ++++++++++++++
 include/linux/mtd/rawnand.h | 14 --------------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index af99041ceaa9..986c7de83326 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -115,6 +115,20 @@ struct nand_page_io_req {
 	int mode;
 };
 
+/**
+ * enum nand_ecc_algo - NAND ECC algorithm
+ * @NAND_ECC_ALGO_UNKNOWN: Unknown algorithm
+ * @NAND_ECC_ALGO_HAMMING: Hamming algorithm
+ * @NAND_ECC_ALGO_BCH: Bose-Chaudhuri-Hocquenghem algorithm
+ * @NAND_ECC_ALGO_RS: Reed-Solomon algorithm
+ */
+enum nand_ecc_algo {
+	NAND_ECC_ALGO_UNKNOWN,
+	NAND_ECC_ALGO_HAMMING,
+	NAND_ECC_ALGO_BCH,
+	NAND_ECC_ALGO_RS,
+};
+
 /**
  * struct nand_ecc_props - NAND ECC properties
  * @strength: ECC strength
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 8174c0c331a1..10bbfbf4ad7f 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -92,20 +92,6 @@ enum nand_ecc_mode {
 	NAND_ECC_ON_DIE,
 };
 
-/**
- * enum nand_ecc_algo - NAND ECC algorithm
- * @NAND_ECC_ALGO_UNKNOWN: Unknown algorithm
- * @NAND_ECC_ALGO_HAMMING: Hamming algorithm
- * @NAND_ECC_ALGO_BCH: Bose-Chaudhuri-Hocquenghem algorithm
- * @NAND_ECC_ALGO_RS: Reed-Solomon algorithm
- */
-enum nand_ecc_algo {
-	NAND_ECC_ALGO_UNKNOWN,
-	NAND_ECC_ALGO_HAMMING,
-	NAND_ECC_ALGO_BCH,
-	NAND_ECC_ALGO_RS,
-};
-
 /*
  * Constants for Hardware ECC
  */
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 04/20] mtd: nand: Add a NAND page I/O request type
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (2 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 03/20] mtd: rawnand: Move the nand_ecc_algo enum to the generic NAND layer Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 05/20] dt-bindings: mtd: Document nand-ecc-placement Miquel Raynal
                   ` (15 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Use an enum to differentiate the type of I/O (reading or writing a
page). Also update the request iterator.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
 drivers/mtd/nand/spi/core.c |  4 ++--
 include/linux/mtd/nand.h    | 18 ++++++++++++++++--
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 4b2619d853e2..6f6ec8aa143d 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -497,7 +497,7 @@ static int spinand_mtd_read(struct mtd_info *mtd, loff_t from,
 
 	mutex_lock(&spinand->lock);
 
-	nanddev_io_for_each_page(nand, from, ops, &iter) {
+	nanddev_io_for_each_page(nand, NAND_PAGE_READ, from, ops, &iter) {
 		ret = spinand_select_target(spinand, iter.req.pos.target);
 		if (ret)
 			break;
@@ -545,7 +545,7 @@ static int spinand_mtd_write(struct mtd_info *mtd, loff_t to,
 
 	mutex_lock(&spinand->lock);
 
-	nanddev_io_for_each_page(nand, to, ops, &iter) {
+	nanddev_io_for_each_page(nand, NAND_PAGE_WRITE, to, ops, &iter) {
 		ret = spinand_select_target(spinand, iter.req.pos.target);
 		if (ret)
 			break;
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 986c7de83326..e754a6fc8a4b 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -82,8 +82,19 @@ struct nand_pos {
 	unsigned int page;
 };
 
+/**
+ * enum nand_page_io_req_type - Direction of an I/O request
+ * @NAND_PAGE_READ: from the chip, to the controller
+ * @NAND_PAGE_WRITE: from the controller, to the chip
+ */
+enum nand_page_io_req_type {
+	NAND_PAGE_READ = 0,
+	NAND_PAGE_WRITE,
+};
+
 /**
  * struct nand_page_io_req - NAND I/O request object
+ * @type: the type of page I/O: read or write
  * @pos: the position this I/O request is targeting
  * @dataoffs: the offset within the page
  * @datalen: number of data bytes to read from/write to this page
@@ -99,6 +110,7 @@ struct nand_pos {
  * specific commands/operations.
  */
 struct nand_page_io_req {
+	enum nand_page_io_req_type type;
 	struct nand_pos pos;
 	unsigned int dataoffs;
 	unsigned int datalen;
@@ -638,11 +650,13 @@ static inline void nanddev_pos_next_page(struct nand_device *nand,
  * layer.
  */
 static inline void nanddev_io_iter_init(struct nand_device *nand,
+					enum nand_page_io_req_type reqtype,
 					loff_t offs, struct mtd_oob_ops *req,
 					struct nand_io_iter *iter)
 {
 	struct mtd_info *mtd = nanddev_to_mtd(nand);
 
+	iter->req.type = reqtype;
 	iter->req.mode = req->mode;
 	iter->req.dataoffs = nanddev_offs_to_pos(nand, offs, &iter->req.pos);
 	iter->req.ooboffs = req->ooboffs;
@@ -712,8 +726,8 @@ static inline bool nanddev_io_iter_end(struct nand_device *nand,
  *
  * Should be used for iterate over pages that are contained in an MTD request.
  */
-#define nanddev_io_for_each_page(nand, start, req, iter)		\
-	for (nanddev_io_iter_init(nand, start, req, iter);		\
+#define nanddev_io_for_each_page(nand, type, start, req, iter)		\
+	for (nanddev_io_iter_init(nand, type, start, req, iter);	\
 	     !nanddev_io_iter_end(nand, iter);				\
 	     nanddev_io_iter_next_page(nand, iter))
 
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 05/20] dt-bindings: mtd: Document nand-ecc-placement
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (3 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 04/20] mtd: nand: Add a NAND page I/O request type Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 06/20] dt-bindings: mtd: Document nand-ecc-engine Miquel Raynal
                   ` (14 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

This optional property defines where the ECC bytes are expected to be
stored. No value defaults to an unknown location, while these
locations can be explicitly set to OOB or interleaved depending if
the ECC bytes are entirely stored in the OOB area or mixed with
regular data in the main area (also sometimes referred as
"syndrome").

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/mtd/nand-controller.yaml       | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/nand-controller.yaml b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
index 40fc5b0b2b8c..02f0347ff102 100644
--- a/Documentation/devicetree/bindings/mtd/nand-controller.yaml
+++ b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
@@ -55,6 +55,16 @@ patternProperties:
         $ref: /schemas/types.yaml#/definitions/string
         enum: [none, soft, hw, hw_syndrome, hw_oob_first, on-die]
 
+      nand-ecc-placement:
+        allOf:
+          - $ref: /schemas/types.yaml#/definitions/string
+          - enum: [ oob, interleaved ]
+        description:
+          Location of the ECC bytes. This location is unknown by default
+          but can be explicitly set to "oob", if all ECC bytes are
+          known to be stored in the OOB area, or "interleaved" if ECC
+          bytes will be interleaved with regular data in the main area.
+
       nand-ecc-algo:
         description:
           Desired ECC algorithm.
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 06/20] dt-bindings: mtd: Document nand-ecc-engine
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (4 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 05/20] dt-bindings: mtd: Document nand-ecc-placement Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 07/20] dt-bindings: mtd: Document boolean NAND ECC properties Miquel Raynal
                   ` (13 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

This property is needed to precisely point to the hardware ECC engine
to use when there are several of them available. Here, hardware also
refers to the on-die possibility.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/mtd/nand-controller.yaml    | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/nand-controller.yaml b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
index 02f0347ff102..ba7f8e4db5a5 100644
--- a/Documentation/devicetree/bindings/mtd/nand-controller.yaml
+++ b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
@@ -55,6 +55,19 @@ patternProperties:
         $ref: /schemas/types.yaml#/definitions/string
         enum: [none, soft, hw, hw_syndrome, hw_oob_first, on-die]
 
+      nand-ecc-engine:
+        allOf:
+          - $ref: /schemas/types.yaml#/definitions/phandle
+        description: |
+          A phandle on the hardware ECC engine if any. There are
+          basically three possibilities:
+          1/ The ECC engine is part of the NAND controller, in this
+          case the phandle should reference the parent node.
+          2/ The ECC engine is part of the NAND part (on-die), in this
+          case the phandle should reference the node itself.
+          3/ The ECC engine is external, in this case the phandle should
+          reference the specific ECC engine node.
+
       nand-ecc-placement:
         allOf:
           - $ref: /schemas/types.yaml#/definitions/string
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 07/20] dt-bindings: mtd: Document boolean NAND ECC properties
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (5 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 06/20] dt-bindings: mtd: Document nand-ecc-engine Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 08/20] mtd: nand: Introduce the ECC engine framework Miquel Raynal
                   ` (12 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Document nand-use-soft-ecc-engine and nand-no-ecc-engine properties.
The former is here to force software correction, the latter prevents
any correction to happen.

These properties (along with nand-ecc-engine) are supposed to be more
accurate than the current nand-ecc-modes wich is very misleading and
very often people think it is mandatory while the core should be
relied upon to decide which correction to handle.

nand-ecc-mode was already inacurate, but it becomes totally
problematic with setups where there are several hardware engines.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/mtd/nand-controller.yaml          | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/nand-controller.yaml b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
index ba7f8e4db5a5..e79bb6d2c108 100644
--- a/Documentation/devicetree/bindings/mtd/nand-controller.yaml
+++ b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
@@ -68,6 +68,14 @@ patternProperties:
           3/ The ECC engine is external, in this case the phandle should
           reference the specific ECC engine node.
 
+      nand-use-soft-ecc-engine:
+        type: boolean
+        description: Use a software ECC engine.
+
+      nand-no-ecc-engine:
+        type: boolean
+        description: Do not use any ECC correction.
+
       nand-ecc-placement:
         allOf:
           - $ref: /schemas/types.yaml#/definitions/string
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 08/20] mtd: nand: Introduce the ECC engine framework
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (6 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 07/20] dt-bindings: mtd: Document boolean NAND ECC properties Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement Miquel Raynal
                   ` (11 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Create a generic ECC engine framework. This is a base to instantiate ECC
engine objects.

If we really want to be generic, bindings must evolve, so here is the
new logic. The following three properties are mutually exclusive:
- The nand-no-ecc-engine boolean property is set and there is no
  ECC engine to retrieve.
- The nand-use-soft-ecc-engine boolean property is set and the core
  will force using the use of software correction.
- There is a nand-ecc-engine property pointing at a node which will
  act as ECC engine.

It the later case, the property may reference:
- The NAND chip node itself (for the on-die ECC case).
- The parent node if the NAND controller embeds an ECC engine.
- Any other node being an external ECC controller as well.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/Kconfig  |   8 +
 drivers/mtd/nand/Makefile |   2 +
 drivers/mtd/nand/ecc.c    | 484 ++++++++++++++++++++++++++++++++++++++
 include/linux/mtd/nand.h  | 114 +++++++++
 4 files changed, 608 insertions(+)
 create mode 100644 drivers/mtd/nand/ecc.c

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index c1a45b071165..4a9aed4f0104 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -9,4 +9,12 @@ source "drivers/mtd/nand/onenand/Kconfig"
 source "drivers/mtd/nand/raw/Kconfig"
 source "drivers/mtd/nand/spi/Kconfig"
 
+menu "ECC engine support"
+
+config MTD_NAND_ECC
+       bool
+       depends on MTD_NAND_CORE
+
+endmenu
+
 endmenu
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 7ecd80c0a66e..981372953b56 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -6,3 +6,5 @@ obj-$(CONFIG_MTD_NAND_CORE) += nandcore.o
 obj-y	+= onenand/
 obj-y	+= raw/
 obj-y	+= spi/
+
+nandcore-$(CONFIG_MTD_NAND_ECC) += ecc.o
diff --git a/drivers/mtd/nand/ecc.c b/drivers/mtd/nand/ecc.c
new file mode 100644
index 000000000000..52de9c9775a0
--- /dev/null
+++ b/drivers/mtd/nand/ecc.c
@@ -0,0 +1,484 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Generic Error-Correcting Code (ECC) engine
+ *
+ * Copyright (C) 2019 Macronix
+ * Author:
+ *     Miquèl RAYNAL <miquel.raynal@bootlin.com>
+ *
+ *
+ * This file describes the abstraction of any NAND ECC engine. It has been
+ * designed to fit most cases, including parallel NANDs and SPI-NANDs.
+ *
+ * There are three main situations where instantiating this ECC engine makes
+ * sense:
+ *   - external: The ECC engine is outside the NAND pipeline, typically this
+ *               is a software ECC engine, or an hardware engine that is
+ *               outside the NAND controller pipeline.
+ *   - pipelined: The ECC engine is inside the NAND pipeline, ie. on the
+ *                controller's side. This is the case of most of the raw NAND
+ *                controllers. In the pipeline case, the ECC bytes are
+ *                generated/data corrected on the fly when a page is
+ *                written/read.
+ *   - ondie: The ECC engine is inside the NAND pipeline, on the chip's side.
+ *            Some NAND chips can correct themselves the data.
+ *
+ * Besides the initial setup and final cleanups, the interfaces are rather
+ * simple:
+ *   - prepare: Prepare an I/O request. Enable/disable the ECC engine based on
+ *              the I/O request type. In case of software correction or external
+ *              engine, this step may involve to derive the ECC bytes and place
+ *              them in the OOB area before a write.
+ *   - finish: Finish an I/O request. Correct the data in case of a read
+ *             request and report the number of corrected bits/uncorrectable
+ *             errors. Most likely empty for write operations, unless you have
+ *             hardware specific stuff to do, like shutting down the engine to
+ *             save power.
+ *
+ * The I/O request should be enclosed in a prepare()/finish() pair of calls
+ * and will behave differently depending on the requested I/O type:
+ *   - raw: Correction disabled
+ *   - ecc: Correction enabled
+ *
+ * The request direction is impacting the logic as well:
+ *   - read: Load data from the NAND chip
+ *   - write: Store data in the NAND chip
+ *
+ * Mixing all this combinations together gives the following behavior.
+ * Those are just examples, drivers are free to add custom steps in their
+ * prepare/finish hook.
+ *
+ * [external ECC engine]
+ *   - external + prepare + raw + read: do nothing
+ *   - external + finish  + raw + read: do nothing
+ *   - external + prepare + raw + write: do nothing
+ *   - external + finish  + raw + write: do nothing
+ *   - external + prepare + ecc + read: do nothing
+ *   - external + finish  + ecc + read: calculate expected ECC bytes, extract
+ *                                      ECC bytes from OOB buffer, correct
+ *                                      and report any bitflip/error
+ *   - external + prepare + ecc + write: calculate ECC bytes and store them at
+ *                                       the right place in the OOB buffer based
+ *                                       on the OOB layout
+ *   - external + finish  + ecc + write: do nothing
+ *
+ * [pipelined ECC engine]
+ *   - pipelined + prepare + raw + read: disable the controller's ECC engine if
+ *                                       activated
+ *   - pipelined + finish  + raw + read: do nothing
+ *   - pipelined + prepare + raw + write: disable the controller's ECC engine if
+ *                                        activated
+ *   - pipelined + finish  + raw + write: do nothing
+ *   - pipelined + prepare + ecc + read: enable the controller's ECC engine if
+ *                                       deactivated
+ *   - pipelined + finish  + ecc + read: check the status, report any
+ *                                       error/bitflip
+ *   - pipelined + prepare + ecc + write: enable the controller's ECC engine if
+ *                                        deactivated
+ *   - pipelined + finish  + ecc + write: do nothing
+ *
+ * [ondie ECC engine]
+ *   - ondie + prepare + raw + read: send commands to disable the on-chip ECC
+ *                                   engine if activated
+ *   - ondie + finish  + raw + read: do nothing
+ *   - ondie + prepare + raw + write: send commands to disable the on-chip ECC
+ *                                    engine if activated
+ *   - ondie + finish  + raw + write: do nothing
+ *   - ondie + prepare + ecc + read: send commands to enable the on-chip ECC
+ *                                   engine if deactivated
+ *   - ondie + finish  + ecc + read: send commands to check the status, report
+ *                                   any error/bitflip
+ *   - ondie + prepare + ecc + write: send commands to enable the on-chip ECC
+ *                                    engine if deactivated
+ *   - ondie + finish  + ecc + write: do nothing
+ */
+
+#include <linux/module.h>
+#include <linux/mtd/nand.h>
+
+/**
+ * nand_ecc_init_ctx - Init the ECC engine context
+ * @nand: the NAND device
+ *
+ * On success, the caller is responsible of calling @nand_ecc_cleanup_ctx().
+ */
+int nand_ecc_init_ctx(struct nand_device *nand)
+{
+	if (!nand->ecc.engine->ops->init_ctx)
+		return 0;
+
+	return nand->ecc.engine->ops->init_ctx(nand);
+}
+EXPORT_SYMBOL(nand_ecc_init_ctx);
+
+/**
+ * nand_ecc_cleanup_ctx - Cleanup the ECC engine context
+ * @nand: the NAND device
+ */
+void nand_ecc_cleanup_ctx(struct nand_device *nand)
+{
+	if (nand->ecc.engine->ops->cleanup_ctx)
+		nand->ecc.engine->ops->cleanup_ctx(nand);
+}
+EXPORT_SYMBOL(nand_ecc_cleanup_ctx);
+
+/**
+ * nand_ecc_prepare_io_req - Prepare an I/O request
+ * @nand: the NAND device
+ * @req: the I/O request
+ */
+int nand_ecc_prepare_io_req(struct nand_device *nand,
+			    struct nand_page_io_req *req)
+{
+	if (!nand->ecc.engine->ops->prepare_io_req)
+		return 0;
+
+	return nand->ecc.engine->ops->prepare_io_req(nand, req);
+}
+EXPORT_SYMBOL(nand_ecc_prepare_io_req);
+
+/**
+ * nand_ecc_finish_io_req - Finish an I/O request
+ * @nand: the NAND device
+ * @req: the I/O request
+ */
+int nand_ecc_finish_io_req(struct nand_device *nand,
+			   struct nand_page_io_req *req)
+{
+	if (!nand->ecc.engine->ops->finish_io_req)
+		return 0;
+
+	return nand->ecc.engine->ops->finish_io_req(nand, req);
+}
+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;
+}
+
+static const struct mtd_ooblayout_ops nand_ooblayout_sp_ops = {
+	.ecc = nand_ooblayout_ecc_sp,
+	.free = nand_ooblayout_free_sp,
+};
+
+const struct mtd_ooblayout_ops *nand_get_small_page_ooblayout(void)
+{
+	return &nand_ooblayout_sp_ops;
+}
+EXPORT_SYMBOL_GPL(nand_get_small_page_ooblayout);
+
+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;
+}
+
+static const struct mtd_ooblayout_ops nand_ooblayout_lp_ops = {
+	.ecc = nand_ooblayout_ecc_lp,
+	.free = nand_ooblayout_free_lp,
+};
+
+const struct mtd_ooblayout_ops *nand_get_large_page_ooblayout(void)
+{
+	return &nand_ooblayout_lp_ops;
+}
+EXPORT_SYMBOL_GPL(nand_get_large_page_ooblayout);
+
+/*
+ * 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;
+}
+
+static const struct mtd_ooblayout_ops nand_ooblayout_lp_hamming_ops = {
+	.ecc = nand_ooblayout_ecc_lp_hamming,
+	.free = nand_ooblayout_free_lp_hamming,
+};
+
+const struct mtd_ooblayout_ops *nand_get_large_page_hamming_ooblayout(void)
+{
+	return &nand_ooblayout_lp_hamming_ops;
+}
+EXPORT_SYMBOL_GPL(nand_get_large_page_hamming_ooblayout);
+
+static enum nand_ecc_engine_type
+of_get_nand_ecc_engine_type(struct device_node *np)
+{
+	struct device_node *eng_np;
+
+	if (of_property_read_bool(np, "nand-no-ecc-engine"))
+		return NAND_ECC_ENGINE_TYPE_NONE;
+
+	if (of_property_read_bool(np, "nand-use-soft-ecc-engine"))
+		return NAND_ECC_ENGINE_TYPE_SOFT;
+
+	eng_np = of_parse_phandle(np, "nand-ecc-engine", 0);
+	of_node_put(eng_np);
+
+	if (eng_np) {
+		if (eng_np == np)
+			return NAND_ECC_ENGINE_TYPE_ON_DIE;
+		else
+			return NAND_ECC_ENGINE_TYPE_ON_HOST;
+	}
+
+	return NAND_ECC_ENGINE_TYPE_INVALID;
+}
+
+static const char * const nand_ecc_placement[] = {
+	[NAND_ECC_PLACEMENT_OOB] = "oob",
+	[NAND_ECC_PLACEMENT_INTERLEAVED] = "interleaved",
+};
+
+enum nand_ecc_placement of_get_nand_ecc_placement(struct device_node *np)
+{
+	enum nand_ecc_placement placement;
+	const char *pm;
+	int err;
+
+	err = of_property_read_string(np, "nand-ecc-placement", &pm);
+	if (!err) {
+		for (placement = NAND_ECC_PLACEMENT_OOB;
+		     placement < ARRAY_SIZE(nand_ecc_placement); placement++) {
+			if (!strcasecmp(pm, nand_ecc_placement[placement]))
+				return placement;
+		}
+	}
+
+	return NAND_ECC_PLACEMENT_UNKNOWN;
+}
+
+static const char * const nand_ecc_algos[] = {
+	[NAND_ECC_ALGO_HAMMING] = "hamming",
+	[NAND_ECC_ALGO_BCH] = "bch",
+	[NAND_ECC_ALGO_RS] = "rs",
+};
+
+static enum nand_ecc_algo of_get_nand_ecc_algo(struct device_node *np)
+{
+	enum nand_ecc_algo ecc_algo;
+	const char *pm;
+	int err;
+
+	err = of_property_read_string(np, "nand-ecc-algo", &pm);
+	if (!err) {
+		for (ecc_algo = NAND_ECC_ALGO_HAMMING;
+		     ecc_algo < ARRAY_SIZE(nand_ecc_algos);
+		     ecc_algo++) {
+			if (!strcasecmp(pm, nand_ecc_algos[ecc_algo]))
+				return ecc_algo;
+		}
+	}
+
+	return NAND_ECC_ALGO_UNKNOWN;
+}
+
+static int of_get_nand_ecc_step_size(struct device_node *np)
+{
+	int ret;
+	u32 val;
+
+	ret = of_property_read_u32(np, "nand-ecc-step-size", &val);
+	return ret ? ret : val;
+}
+
+static int of_get_nand_ecc_strength(struct device_node *np)
+{
+	int ret;
+	u32 val;
+
+	ret = of_property_read_u32(np, "nand-ecc-strength", &val);
+	return ret ? ret : val;
+}
+
+void of_get_nand_ecc_user_config(struct nand_device *nand)
+{
+	struct device_node *dn = nanddev_get_of_node(nand);
+	int strength, size;
+
+	nand->ecc.user_conf.engine_type = of_get_nand_ecc_engine_type(dn);
+	nand->ecc.user_conf.algo = of_get_nand_ecc_algo(dn);
+	nand->ecc.user_conf.placement = of_get_nand_ecc_placement(dn);
+
+	strength = of_get_nand_ecc_strength(dn);
+	if (strength >= 0)
+		nand->ecc.user_conf.strength = strength;
+
+	size = of_get_nand_ecc_step_size(dn);
+	if (size >= 0)
+		nand->ecc.user_conf.step_size = size;
+
+	if (of_property_read_bool(dn, "nand-ecc-maximize"))
+		nand->ecc.user_conf.flags |= NAND_ECC_MAXIMIZE_STRENGTH;
+}
+EXPORT_SYMBOL(of_get_nand_ecc_user_config);
+
+/**
+ * nand_ecc_is_strong_enough - Check if the chip configuration meets the
+ *                             datasheet requirements.
+ *
+ * @nand: Device to check
+ *
+ * If our configuration corrects A bits per B bytes and the minimum
+ * required correction level is X bits per Y bytes, then we must ensure
+ * both of the following are true:
+ *
+ * (1) A / B >= X / Y
+ * (2) A >= X
+ *
+ * Requirement (1) ensures we can correct for the required bitflip density.
+ * Requirement (2) ensures we can correct even when all bitflips are clumped
+ * in the same sector.
+ */
+bool nand_ecc_is_strong_enough(struct nand_device *nand)
+{
+	const struct nand_ecc_props *reqs = nanddev_get_ecc_requirements(nand);
+	const struct nand_ecc_props *conf = nanddev_get_ecc_conf(nand);
+	struct mtd_info *mtd = nanddev_to_mtd(nand);
+	int corr, ds_corr;
+
+	if (conf->step_size == 0 || reqs->step_size == 0)
+		/* Not enough information */
+		return true;
+
+	/*
+	 * We get the number of corrected bits per page to compare
+	 * the correction density.
+	 */
+	corr = (mtd->writesize * conf->strength) / conf->step_size;
+	ds_corr = (mtd->writesize * reqs->strength) / reqs->step_size;
+
+	return corr >= ds_corr && conf->strength >= reqs->strength;
+}
+EXPORT_SYMBOL(nand_ecc_is_strong_enough);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Miquel Raynal <miquel.raynal@bootlin.com>");
+MODULE_DESCRIPTION("Generic ECC engine");
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index e754a6fc8a4b..8cf5bdbea782 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -127,6 +127,40 @@ struct nand_page_io_req {
 	int mode;
 };
 
+const struct mtd_ooblayout_ops *nand_get_small_page_ooblayout(void);
+const struct mtd_ooblayout_ops *nand_get_large_page_ooblayout(void);
+const struct mtd_ooblayout_ops *nand_get_large_page_hamming_ooblayout(void);
+
+/**
+ * enum nand_ecc_engine_type - NAND ECC engine type
+ * @NAND_ECC_ENGINE_TYPE_INVALID: Invalid value
+ * @NAND_ECC_ENGINE_TYPE_NONE: No ECC correction
+ * @NAND_ECC_ENGINE_TYPE_SOFT: Software ECC correction
+ * @NAND_ECC_ENGINE_TYPE_ON_HOST: On host hardware ECC correction
+ * @NAND_ECC_ENGINE_TYPE_ON_DIE: On chip hardware ECC correction
+ */
+enum nand_ecc_engine_type {
+	NAND_ECC_ENGINE_TYPE_INVALID,
+	NAND_ECC_ENGINE_TYPE_NONE,
+	NAND_ECC_ENGINE_TYPE_SOFT,
+	NAND_ECC_ENGINE_TYPE_ON_HOST,
+	NAND_ECC_ENGINE_TYPE_ON_DIE,
+};
+
+/**
+ * enum nand_ecc_placement - NAND ECC bytes placement
+ * @NAND_ECC_PLACEMENT_UNKNOWN: The actual position of the ECC bytes is unknown
+ * @NAND_ECC_PLACEMENT_OOB: The ECC bytes are located in the OOB area
+ * @NAND_ECC_PLACEMENT_INTERLEAVED: Syndrome layout, there are ECC bytes
+ *                                  interleaved with regular data in the main
+ *                                  area
+ */
+enum nand_ecc_placement {
+	NAND_ECC_PLACEMENT_UNKNOWN,
+	NAND_ECC_PLACEMENT_OOB,
+	NAND_ECC_PLACEMENT_INTERLEAVED,
+};
+
 /**
  * enum nand_ecc_algo - NAND ECC algorithm
  * @NAND_ECC_ALGO_UNKNOWN: Unknown algorithm
@@ -143,16 +177,27 @@ enum nand_ecc_algo {
 
 /**
  * struct nand_ecc_props - NAND ECC properties
+ * @engine_type: ECC engine type
+ * @placement: OOB placement (if relevant)
+ * @algo: ECC algorithm (if relevant)
  * @strength: ECC strength
  * @step_size: Number of bytes per step
+ * @flags: Misc properties
  */
 struct nand_ecc_props {
+	enum nand_ecc_engine_type engine_type;
+	enum nand_ecc_placement placement;
+	enum nand_ecc_algo algo;
 	unsigned int strength;
 	unsigned int step_size;
+	unsigned int flags;
 };
 
 #define NAND_ECCREQ(str, stp) { .strength = (str), .step_size = (stp) }
 
+/* NAND ECC misc flags */
+#define NAND_ECC_MAXIMIZE_STRENGTH BIT(0)
+
 /**
  * struct nand_bbt - bad block table object
  * @cache: in memory BBT cache
@@ -183,6 +228,75 @@ struct nand_ops {
 	bool (*isbad)(struct nand_device *nand, const struct nand_pos *pos);
 };
 
+/**
+ * struct nand_ecc_context - Context for the ECC engine
+ * @conf: basic ECC engine parameters
+ * @total: total number of bytes used for storing ECC codes, this is used by
+ *         generic OOB layouts
+ * @priv: ECC engine driver private data
+ */
+struct nand_ecc_context {
+	struct nand_ecc_props conf;
+	unsigned int total;
+	void *priv;
+};
+
+/**
+ * struct nand_ecc_engine_ops - ECC engine operations
+ * @init_ctx: given a desired user configuration for the pointed NAND device,
+ *            requests the ECC engine driver to setup a configuration with
+ *            values it supports.
+ * @cleanup_ctx: clean the context initialized by @init_ctx.
+ * @prepare_io_req: is called before reading/writing a page to prepare the I/O
+ *                  request to be performed with ECC correction.
+ * @finish_io_req: is called after reading/writing a page to terminate the I/O
+ *                 request and ensure proper ECC correction.
+ */
+struct nand_ecc_engine_ops {
+	int (*init_ctx)(struct nand_device *nand);
+	void (*cleanup_ctx)(struct nand_device *nand);
+	int (*prepare_io_req)(struct nand_device *nand,
+			      struct nand_page_io_req *req);
+	int (*finish_io_req)(struct nand_device *nand,
+			     struct nand_page_io_req *req);
+};
+
+/**
+ * struct nand_ecc_engine - ECC engine abstraction for NAND devices
+ * @ops: ECC engine operations
+ */
+struct nand_ecc_engine {
+	struct nand_ecc_engine_ops *ops;
+};
+
+void of_get_nand_ecc_user_config(struct nand_device *nand);
+int nand_ecc_init_ctx(struct nand_device *nand);
+void nand_ecc_cleanup_ctx(struct nand_device *nand);
+int nand_ecc_prepare_io_req(struct nand_device *nand,
+			    struct nand_page_io_req *req);
+int nand_ecc_finish_io_req(struct nand_device *nand,
+			   struct nand_page_io_req *req);
+bool nand_ecc_is_strong_enough(struct nand_device *nand);
+
+/**
+ * struct nand_ecc - Information relative to the ECC
+ * @defaults: Default values, depend on the underlying subsystem
+ * @requirements: ECC requirements from the NAND chip perspective
+ * @user_conf: User desires in terms of ECC parameters
+ * @ctx: ECC context for the ECC engine, derived from the device @requirements
+ *       the @user_conf and the @defaults
+ * @ondie_engine: On-die ECC engine reference, if any
+ * @engine: ECC engine actually bound
+ */
+struct nand_ecc {
+	struct nand_ecc_props defaults;
+	struct nand_ecc_props requirements;
+	struct nand_ecc_props user_conf;
+	struct nand_ecc_context ctx;
+	struct nand_ecc_engine *ondie_engine;
+	struct nand_ecc_engine *engine;
+};
+
 /**
  * struct nand_device - NAND device
  * @mtd: MTD instance attached to the NAND device
-- 
2.20.1


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^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (7 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 08/20] mtd: nand: Introduce the ECC engine framework Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-10-14 21:36   ` Han Xu
  2020-08-27  8:51 ` [PATCH v13 10/20] mtd: rawnand: Use the new ECC engine type enumeration Miquel Raynal
                   ` (10 subsequent siblings)
  19 siblings, 2 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

The use of "syndrome" placement should not be encoded in the ECC
engine mode/type.

Create a "placement" field in NAND chip and change all occurrences of
the NAND_ECC_HW_SYNDROME enumeration to be just NAND_ECC_HW and
possibly a placement entry like NAND_ECC_PLACEMENT_INTERLEAVED.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
 arch/arm/mach-davinci/board-dm355-leopard.c |   3 +-
 drivers/mtd/nand/raw/cafe_nand.c            |   3 +-
 drivers/mtd/nand/raw/davinci_nand.c         |   5 +-
 drivers/mtd/nand/raw/denali.c               |   3 +-
 drivers/mtd/nand/raw/diskonchip.c           |   3 +-
 drivers/mtd/nand/raw/lpc32xx_slc.c          |   3 +-
 drivers/mtd/nand/raw/nand_base.c            | 109 +++++++++++---------
 drivers/mtd/nand/raw/r852.c                 |   3 +-
 include/linux/mtd/rawnand.h                 |   6 +-
 include/linux/platform_data/mtd-davinci.h   |   1 +
 10 files changed, 81 insertions(+), 58 deletions(-)

diff --git a/arch/arm/mach-davinci/board-dm355-leopard.c b/arch/arm/mach-davinci/board-dm355-leopard.c
index b9e9950dd300..4c8a592754ac 100644
--- a/arch/arm/mach-davinci/board-dm355-leopard.c
+++ b/arch/arm/mach-davinci/board-dm355-leopard.c
@@ -76,7 +76,8 @@ static struct davinci_nand_pdata davinci_nand_data = {
 	.mask_chipsel		= BIT(14),
 	.parts			= davinci_nand_partitions,
 	.nr_parts		= ARRAY_SIZE(davinci_nand_partitions),
-	.ecc_mode		= NAND_ECC_HW_SYNDROME,
+	.ecc_mode		= NAND_HW_ECC_ENGINE,
+	.ecc_placement		= NAND_ECC_PLACEMENT_INTERLEAVED,
 	.ecc_bits		= 4,
 	.bbt_options		= NAND_BBT_USE_FLASH,
 };
diff --git a/drivers/mtd/nand/raw/cafe_nand.c b/drivers/mtd/nand/raw/cafe_nand.c
index 92173790f20b..2bf8ab542e38 100644
--- a/drivers/mtd/nand/raw/cafe_nand.c
+++ b/drivers/mtd/nand/raw/cafe_nand.c
@@ -629,7 +629,8 @@ static int cafe_nand_attach_chip(struct nand_chip *chip)
 		goto out_free_dma;
 	}
 
-	cafe->nand.ecc.mode = NAND_ECC_HW_SYNDROME;
+	cafe->nand.ecc.mode = NAND_ECC_HW;
+	cafe->nand.ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
 	cafe->nand.ecc.size = mtd->writesize;
 	cafe->nand.ecc.bytes = 14;
 	cafe->nand.ecc.strength = 4;
diff --git a/drivers/mtd/nand/raw/davinci_nand.c b/drivers/mtd/nand/raw/davinci_nand.c
index 551515c223bb..3640c7e45e15 100644
--- a/drivers/mtd/nand/raw/davinci_nand.c
+++ b/drivers/mtd/nand/raw/davinci_nand.c
@@ -168,7 +168,7 @@ static int nand_davinci_correct_1bit(struct nand_chip *chip, u_char *dat,
 /*
  * 4-bit hardware ECC ... context maintained over entire AEMIF
  *
- * This is a syndrome engine, but we avoid NAND_ECC_HW_SYNDROME
+ * This is a syndrome engine, but we avoid NAND_ECC_PLACEMENT_INTERLEAVED
  * since that forces use of a problematic "infix OOB" layout.
  * Among other things, it trashes manufacturer bad block markers.
  * Also, and specific to this hardware, it ECC-protects the "prepad"
@@ -851,6 +851,7 @@ static int nand_davinci_probe(struct platform_device *pdev)
 
 	/* Use board-specific ECC config */
 	info->chip.ecc.mode	= pdata->ecc_mode;
+	info->chip.ecc.placement = pdata->ecc_placement;
 
 	spin_lock_irq(&davinci_nand_lock);
 
@@ -897,7 +898,7 @@ static int nand_davinci_remove(struct platform_device *pdev)
 	int ret;
 
 	spin_lock_irq(&davinci_nand_lock);
-	if (info->chip.ecc.mode == NAND_ECC_HW_SYNDROME)
+	if (info->chip.ecc.placement == NAND_ECC_PLACEMENT_INTERLEAVED)
 		ecc4_busy = false;
 	spin_unlock_irq(&davinci_nand_lock);
 
diff --git a/drivers/mtd/nand/raw/denali.c b/drivers/mtd/nand/raw/denali.c
index 9d99dade95ce..0e54b8a61cf0 100644
--- a/drivers/mtd/nand/raw/denali.c
+++ b/drivers/mtd/nand/raw/denali.c
@@ -1237,7 +1237,8 @@ int denali_chip_init(struct denali_controller *denali,
 	chip->bbt_options |= NAND_BBT_USE_FLASH;
 	chip->bbt_options |= NAND_BBT_NO_OOB;
 	chip->options |= NAND_NO_SUBPAGE_WRITE;
-	chip->ecc.mode = NAND_ECC_HW_SYNDROME;
+	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
 	chip->ecc.read_page = denali_read_page;
 	chip->ecc.write_page = denali_write_page;
 	chip->ecc.read_page_raw = denali_read_page_raw;
diff --git a/drivers/mtd/nand/raw/diskonchip.c b/drivers/mtd/nand/raw/diskonchip.c
index 43721863a0d8..40360352136b 100644
--- a/drivers/mtd/nand/raw/diskonchip.c
+++ b/drivers/mtd/nand/raw/diskonchip.c
@@ -1456,7 +1456,8 @@ static int __init doc_probe(unsigned long physadr)
 	nand->ecc.calculate	= doc200x_calculate_ecc;
 	nand->ecc.correct	= doc200x_correct_data;
 
-	nand->ecc.mode		= NAND_ECC_HW_SYNDROME;
+	nand->ecc.mode		= NAND_ECC_HW;
+	nand->ecc.placement	= NAND_ECC_PLACEMENT_INTERLEAVED;
 	nand->ecc.size		= 512;
 	nand->ecc.bytes		= 6;
 	nand->ecc.strength	= 2;
diff --git a/drivers/mtd/nand/raw/lpc32xx_slc.c b/drivers/mtd/nand/raw/lpc32xx_slc.c
index b151fd000815..ccb189c8e343 100644
--- a/drivers/mtd/nand/raw/lpc32xx_slc.c
+++ b/drivers/mtd/nand/raw/lpc32xx_slc.c
@@ -881,7 +881,8 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, host);
 
 	/* NAND callbacks for LPC32xx SLC hardware */
-	chip->ecc.mode = NAND_ECC_HW_SYNDROME;
+	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
 	chip->legacy.read_byte = lpc32xx_nand_read_byte;
 	chip->legacy.read_buf = lpc32xx_nand_read_buf;
 	chip->legacy.write_buf = lpc32xx_nand_write_buf;
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 1d403b439850..5e1f4c1faec0 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5795,61 +5795,74 @@ static int nand_scan_tail(struct nand_chip *chip)
 
 	switch (ecc->mode) {
 	case NAND_ECC_HW:
-		/* Use standard hwecc read page function? */
-		if (!ecc->read_page)
-			ecc->read_page = nand_read_page_hwecc;
-		if (!ecc->write_page)
-			ecc->write_page = nand_write_page_hwecc;
-		if (!ecc->read_page_raw)
-			ecc->read_page_raw = nand_read_page_raw;
-		if (!ecc->write_page_raw)
-			ecc->write_page_raw = nand_write_page_raw;
-		if (!ecc->read_oob)
-			ecc->read_oob = nand_read_oob_std;
-		if (!ecc->write_oob)
-			ecc->write_oob = nand_write_oob_std;
-		if (!ecc->read_subpage)
-			ecc->read_subpage = nand_read_subpage;
-		if (!ecc->write_subpage && ecc->hwctl && ecc->calculate)
-			ecc->write_subpage = nand_write_subpage_hwecc;
-		fallthrough;
-	case NAND_ECC_HW_SYNDROME:
-		if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
-		    (!ecc->read_page ||
-		     ecc->read_page == nand_read_page_hwecc ||
-		     !ecc->write_page ||
-		     ecc->write_page == nand_write_page_hwecc)) {
-			WARN(1, "No ECC functions supplied; hardware ECC not possible\n");
-			ret = -EINVAL;
-			goto err_nand_manuf_cleanup;
-		}
-		/* Use standard syndrome read/write page function? */
-		if (!ecc->read_page)
-			ecc->read_page = nand_read_page_syndrome;
-		if (!ecc->write_page)
-			ecc->write_page = nand_write_page_syndrome;
-		if (!ecc->read_page_raw)
-			ecc->read_page_raw = nand_read_page_raw_syndrome;
-		if (!ecc->write_page_raw)
-			ecc->write_page_raw = nand_write_page_raw_syndrome;
-		if (!ecc->read_oob)
-			ecc->read_oob = nand_read_oob_syndrome;
-		if (!ecc->write_oob)
-			ecc->write_oob = nand_write_oob_syndrome;
+		switch (ecc->placement) {
+		case NAND_ECC_PLACEMENT_UNKNOWN:
+		case NAND_ECC_PLACEMENT_OOB:
+			/* Use standard hwecc read page function? */
+			if (!ecc->read_page)
+				ecc->read_page = nand_read_page_hwecc;
+			if (!ecc->write_page)
+				ecc->write_page = nand_write_page_hwecc;
+			if (!ecc->read_page_raw)
+				ecc->read_page_raw = nand_read_page_raw;
+			if (!ecc->write_page_raw)
+				ecc->write_page_raw = nand_write_page_raw;
+			if (!ecc->read_oob)
+				ecc->read_oob = nand_read_oob_std;
+			if (!ecc->write_oob)
+				ecc->write_oob = nand_write_oob_std;
+			if (!ecc->read_subpage)
+				ecc->read_subpage = nand_read_subpage;
+			if (!ecc->write_subpage && ecc->hwctl && ecc->calculate)
+				ecc->write_subpage = nand_write_subpage_hwecc;
+			fallthrough;
 
-		if (mtd->writesize >= ecc->size) {
-			if (!ecc->strength) {
-				WARN(1, "Driver must set ecc.strength when using hardware ECC\n");
+		case NAND_ECC_PLACEMENT_INTERLEAVED:
+			if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
+			    (!ecc->read_page ||
+			     ecc->read_page == nand_read_page_hwecc ||
+			     !ecc->write_page ||
+			     ecc->write_page == nand_write_page_hwecc)) {
+				WARN(1, "No ECC functions supplied; hardware ECC not possible\n");
 				ret = -EINVAL;
 				goto err_nand_manuf_cleanup;
 			}
+			/* Use standard syndrome read/write page function? */
+			if (!ecc->read_page)
+				ecc->read_page = nand_read_page_syndrome;
+			if (!ecc->write_page)
+				ecc->write_page = nand_write_page_syndrome;
+			if (!ecc->read_page_raw)
+				ecc->read_page_raw = nand_read_page_raw_syndrome;
+			if (!ecc->write_page_raw)
+				ecc->write_page_raw = nand_write_page_raw_syndrome;
+			if (!ecc->read_oob)
+				ecc->read_oob = nand_read_oob_syndrome;
+			if (!ecc->write_oob)
+				ecc->write_oob = nand_write_oob_syndrome;
+
+			if (mtd->writesize >= ecc->size) {
+				if (!ecc->strength) {
+					WARN(1, "Driver must set ecc.strength when using hardware ECC\n");
+					ret = -EINVAL;
+					goto err_nand_manuf_cleanup;
+				}
+				break;
+			}
+			pr_warn("%d byte HW ECC not possible on %d byte page size, fallback to SW ECC\n",
+				ecc->size, mtd->writesize);
+			ecc->mode = NAND_ECC_SOFT;
+			ecc->algo = NAND_ECC_ALGO_HAMMING;
 			break;
+
+		default:
+			pr_warn("Invalid NAND_ECC_PLACEMENT %d\n",
+				ecc->placement);
+			ret = -EINVAL;
+			goto err_nand_manuf_cleanup;
 		}
-		pr_warn("%d byte HW ECC not possible on %d byte page size, fallback to SW ECC\n",
-			ecc->size, mtd->writesize);
-		ecc->mode = NAND_ECC_SOFT;
-		ecc->algo = NAND_ECC_ALGO_HAMMING;
 		fallthrough;
+
 	case NAND_ECC_SOFT:
 		ret = nand_set_ecc_soft_ops(chip);
 		if (ret) {
diff --git a/drivers/mtd/nand/raw/r852.c b/drivers/mtd/nand/raw/r852.c
index f865e3a47b01..f0988cda4479 100644
--- a/drivers/mtd/nand/raw/r852.c
+++ b/drivers/mtd/nand/raw/r852.c
@@ -859,7 +859,8 @@ static int  r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
 	chip->legacy.write_buf = r852_write_buf;
 
 	/* ecc */
-	chip->ecc.mode = NAND_ECC_HW_SYNDROME;
+	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
 	chip->ecc.size = R852_DMA_LEN;
 	chip->ecc.bytes = SM_OOB_SIZE;
 	chip->ecc.strength = 2;
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 10bbfbf4ad7f..cfd75a12f802 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -304,6 +304,7 @@ static const struct nand_ecc_caps __name = {			\
 /**
  * struct nand_ecc_ctrl - Control structure for ECC
  * @mode:	ECC mode
+ * @placement:	OOB bytes placement
  * @algo:	ECC algorithm
  * @steps:	number of ECC steps per page
  * @size:	data bytes per ECC step
@@ -331,7 +332,7 @@ static const struct nand_ecc_caps __name = {			\
  *			controller and always return contiguous in-band and
  *			out-of-band data even if they're not stored
  *			contiguously on the NAND chip (e.g.
- *			NAND_ECC_HW_SYNDROME interleaves in-band and
+ *			NAND_ECC_PLACEMENT_INTERLEAVED interleaves in-band and
  *			out-of-band data).
  * @write_page_raw:	function to write a raw page without ECC. This function
  *			should hide the specific layout used by the ECC
@@ -339,7 +340,7 @@ static const struct nand_ecc_caps __name = {			\
  *			in-band and out-of-band data. ECC controller is
  *			responsible for doing the appropriate transformations
  *			to adapt to its specific layout (e.g.
- *			NAND_ECC_HW_SYNDROME interleaves in-band and
+ *			NAND_ECC_PLACEMENT_INTERLEAVED interleaves in-band and
  *			out-of-band data).
  * @read_page:	function to read a page according to the ECC generator
  *		requirements; returns maximum number of bitflips corrected in
@@ -356,6 +357,7 @@ static const struct nand_ecc_caps __name = {			\
  */
 struct nand_ecc_ctrl {
 	enum nand_ecc_mode mode;
+	enum nand_ecc_placement placement;
 	enum nand_ecc_algo algo;
 	int steps;
 	int size;
diff --git a/include/linux/platform_data/mtd-davinci.h b/include/linux/platform_data/mtd-davinci.h
index 03e92c71b3fa..6e2b252a4ce6 100644
--- a/include/linux/platform_data/mtd-davinci.h
+++ b/include/linux/platform_data/mtd-davinci.h
@@ -69,6 +69,7 @@ struct davinci_nand_pdata {		/* platform_data */
 	 * using it with large page chips.
 	 */
 	enum nand_ecc_mode	ecc_mode;
+	enum nand_ecc_placement ecc_placement;
 	u8			ecc_bits;
 
 	/* e.g. NAND_BUSWIDTH_16 */
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 10/20] mtd: rawnand: Use the new ECC engine type enumeration
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (8 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:51 ` [PATCH v13 11/20] mtd: nand: Create a helper to extract the ECC configuration Miquel Raynal
                   ` (9 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Mechanical switch from the legacy "mode" enumeration to the new
"engine type" enumeration in drivers and board files.

The device tree parsing is also updated to return the new enumeration
from the old strings.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
 arch/arm/mach-davinci/board-da830-evm.c       |  2 +-
 arch/arm/mach-davinci/board-da850-evm.c       |  2 +-
 arch/arm/mach-davinci/board-dm355-evm.c       |  2 +-
 arch/arm/mach-davinci/board-dm355-leopard.c   |  2 +-
 arch/arm/mach-davinci/board-dm365-evm.c       |  2 +-
 arch/arm/mach-davinci/board-dm644x-evm.c      |  2 +-
 arch/arm/mach-davinci/board-dm646x-evm.c      |  2 +-
 arch/arm/mach-davinci/board-mityomapl138.c    |  2 +-
 arch/arm/mach-davinci/board-neuros-osd2.c     |  2 +-
 arch/arm/mach-davinci/board-omapl138-hawk.c   |  2 +-
 arch/arm/mach-s3c24xx/common-smdk.c           |  2 +-
 arch/arm/mach-s3c24xx/mach-anubis.c           |  2 +-
 arch/arm/mach-s3c24xx/mach-at2440evb.c        |  2 +-
 arch/arm/mach-s3c24xx/mach-bast.c             |  2 +-
 arch/arm/mach-s3c24xx/mach-gta02.c            |  2 +-
 arch/arm/mach-s3c24xx/mach-jive.c             |  2 +-
 arch/arm/mach-s3c24xx/mach-mini2440.c         |  2 +-
 arch/arm/mach-s3c24xx/mach-osiris.c           |  2 +-
 arch/arm/mach-s3c24xx/mach-qt2410.c           |  2 +-
 arch/arm/mach-s3c24xx/mach-rx1950.c           |  2 +-
 arch/arm/mach-s3c24xx/mach-rx3715.c           |  2 +-
 arch/arm/mach-s3c24xx/mach-vstms.c            |  2 +-
 arch/arm/mach-s3c64xx/mach-hmt.c              |  2 +-
 arch/arm/mach-s3c64xx/mach-mini6410.c         |  2 +-
 arch/arm/mach-s3c64xx/mach-real6410.c         |  2 +-
 drivers/mtd/nand/raw/ams-delta.c              |  2 +-
 drivers/mtd/nand/raw/arasan-nand-controller.c | 12 +--
 drivers/mtd/nand/raw/atmel/nand-controller.c  | 14 ++--
 drivers/mtd/nand/raw/au1550nd.c               |  2 +-
 .../mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c  |  3 +-
 drivers/mtd/nand/raw/brcmnand/brcmnand.c      |  8 +-
 .../mtd/nand/raw/cadence-nand-controller.c    |  4 +-
 drivers/mtd/nand/raw/cafe_nand.c              |  2 +-
 drivers/mtd/nand/raw/cs553x_nand.c            |  2 +-
 drivers/mtd/nand/raw/davinci_nand.c           | 24 +++---
 drivers/mtd/nand/raw/denali.c                 |  2 +-
 drivers/mtd/nand/raw/diskonchip.c             |  2 +-
 drivers/mtd/nand/raw/fsl_elbc_nand.c          | 18 ++---
 drivers/mtd/nand/raw/fsl_ifc_nand.c           | 10 +--
 drivers/mtd/nand/raw/fsl_upm.c                |  2 +-
 drivers/mtd/nand/raw/fsmc_nand.c              | 12 +--
 drivers/mtd/nand/raw/gpio.c                   |  2 +-
 drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c    |  2 +-
 drivers/mtd/nand/raw/hisi504_nand.c           |  6 +-
 .../mtd/nand/raw/ingenic/ingenic_nand_drv.c   | 14 ++--
 drivers/mtd/nand/raw/lpc32xx_mlc.c            |  2 +-
 drivers/mtd/nand/raw/lpc32xx_slc.c            |  2 +-
 drivers/mtd/nand/raw/marvell_nand.c           | 17 ++--
 drivers/mtd/nand/raw/meson_nand.c             |  2 +-
 drivers/mtd/nand/raw/mpc5121_nfc.c            |  2 +-
 drivers/mtd/nand/raw/mtk_nand.c               |  6 +-
 drivers/mtd/nand/raw/mxc_nand.c               | 23 +++---
 drivers/mtd/nand/raw/nand_base.c              | 78 ++++++++++++-------
 drivers/mtd/nand/raw/nand_micron.c            |  4 +-
 drivers/mtd/nand/raw/nand_toshiba.c           |  3 +-
 drivers/mtd/nand/raw/nandsim.c                |  4 +-
 drivers/mtd/nand/raw/ndfc.c                   |  2 +-
 drivers/mtd/nand/raw/omap2.c                  | 20 ++---
 drivers/mtd/nand/raw/orion_nand.c             |  2 +-
 drivers/mtd/nand/raw/pasemi_nand.c            |  2 +-
 drivers/mtd/nand/raw/plat_nand.c              |  2 +-
 drivers/mtd/nand/raw/qcom_nandc.c             |  2 +-
 drivers/mtd/nand/raw/r852.c                   |  2 +-
 drivers/mtd/nand/raw/s3c2410.c                | 18 ++---
 drivers/mtd/nand/raw/sh_flctl.c               |  4 +-
 drivers/mtd/nand/raw/sharpsl.c                |  2 +-
 drivers/mtd/nand/raw/socrates_nand.c          |  3 +-
 drivers/mtd/nand/raw/stm32_fmc2_nand.c        |  9 ++-
 drivers/mtd/nand/raw/sunxi_nand.c             | 18 ++---
 drivers/mtd/nand/raw/tango_nand.c             |  2 +-
 drivers/mtd/nand/raw/tegra_nand.c             |  2 +-
 drivers/mtd/nand/raw/tmio_nand.c              |  2 +-
 drivers/mtd/nand/raw/txx9ndfmc.c              |  2 +-
 drivers/mtd/nand/raw/vf610_nfc.c              |  4 +-
 drivers/mtd/nand/raw/xway_nand.c              |  2 +-
 include/linux/mtd/rawnand.h                   |  4 +-
 include/linux/platform_data/mtd-davinci.h     |  8 +-
 .../linux/platform_data/mtd-nand-s3c2410.h    |  2 +-
 78 files changed, 238 insertions(+), 212 deletions(-)

diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index 1076886938b6..a20ba12d876c 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -306,7 +306,7 @@ static struct davinci_nand_pdata da830_evm_nand_pdata = {
 	.core_chipsel	= 1,
 	.parts		= da830_evm_nand_partitions,
 	.nr_parts	= ARRAY_SIZE(da830_evm_nand_partitions),
-	.ecc_mode	= NAND_ECC_HW,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.ecc_bits	= 4,
 	.bbt_options	= NAND_BBT_USE_FLASH,
 	.bbt_td		= &da830_evm_nand_bbt_main_descr,
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 6751292e5f8f..428012687a80 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -239,7 +239,7 @@ static struct davinci_nand_pdata da850_evm_nandflash_data = {
 	.core_chipsel	= 1,
 	.parts		= da850_evm_nandflash_partition,
 	.nr_parts	= ARRAY_SIZE(da850_evm_nandflash_partition),
-	.ecc_mode	= NAND_ECC_HW,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.ecc_bits	= 4,
 	.bbt_options	= NAND_BBT_USE_FLASH,
 	.timing		= &da850_evm_nandflash_timing,
diff --git a/arch/arm/mach-davinci/board-dm355-evm.c b/arch/arm/mach-davinci/board-dm355-evm.c
index 5113273fda69..3c5a9e3c128a 100644
--- a/arch/arm/mach-davinci/board-dm355-evm.c
+++ b/arch/arm/mach-davinci/board-dm355-evm.c
@@ -82,7 +82,7 @@ static struct davinci_nand_pdata davinci_nand_data = {
 	.mask_chipsel		= BIT(14),
 	.parts			= davinci_nand_partitions,
 	.nr_parts		= ARRAY_SIZE(davinci_nand_partitions),
-	.ecc_mode		= NAND_ECC_HW,
+	.engine_type		= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.bbt_options		= NAND_BBT_USE_FLASH,
 	.ecc_bits		= 4,
 };
diff --git a/arch/arm/mach-davinci/board-dm355-leopard.c b/arch/arm/mach-davinci/board-dm355-leopard.c
index 4c8a592754ac..e475b2113e70 100644
--- a/arch/arm/mach-davinci/board-dm355-leopard.c
+++ b/arch/arm/mach-davinci/board-dm355-leopard.c
@@ -76,7 +76,7 @@ static struct davinci_nand_pdata davinci_nand_data = {
 	.mask_chipsel		= BIT(14),
 	.parts			= davinci_nand_partitions,
 	.nr_parts		= ARRAY_SIZE(davinci_nand_partitions),
-	.ecc_mode		= NAND_HW_ECC_ENGINE,
+	.engine_type		= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.ecc_placement		= NAND_ECC_PLACEMENT_INTERLEAVED,
 	.ecc_bits		= 4,
 	.bbt_options		= NAND_BBT_USE_FLASH,
diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index 2328b15ac067..bdf31eb77620 100644
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -146,7 +146,7 @@ static struct davinci_nand_pdata davinci_nand_data = {
 	.mask_chipsel		= BIT(14),
 	.parts			= davinci_nand_partitions,
 	.nr_parts		= ARRAY_SIZE(davinci_nand_partitions),
-	.ecc_mode		= NAND_ECC_HW,
+	.engine_type		= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.bbt_options		= NAND_BBT_USE_FLASH,
 	.ecc_bits		= 4,
 };
diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c
index a5d3708fedf6..bcb3c4070945 100644
--- a/arch/arm/mach-davinci/board-dm644x-evm.c
+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
@@ -162,7 +162,7 @@ static struct davinci_nand_pdata davinci_evm_nandflash_data = {
 	.core_chipsel	= 0,
 	.parts		= davinci_evm_nandflash_partition,
 	.nr_parts	= ARRAY_SIZE(davinci_evm_nandflash_partition),
-	.ecc_mode	= NAND_ECC_HW,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.ecc_bits	= 1,
 	.bbt_options	= NAND_BBT_USE_FLASH,
 	.timing		= &davinci_evm_nandflash_timing,
diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c
index dd7d60f4139a..8319a6067a68 100644
--- a/arch/arm/mach-davinci/board-dm646x-evm.c
+++ b/arch/arm/mach-davinci/board-dm646x-evm.c
@@ -91,7 +91,7 @@ static struct davinci_nand_pdata davinci_nand_data = {
 	.mask_ale 		= 0x40000,
 	.parts			= davinci_nand_partitions,
 	.nr_parts		= ARRAY_SIZE(davinci_nand_partitions),
-	.ecc_mode		= NAND_ECC_HW,
+	.engine_type		= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.ecc_bits		= 1,
 	.options		= 0,
 };
diff --git a/arch/arm/mach-davinci/board-mityomapl138.c b/arch/arm/mach-davinci/board-mityomapl138.c
index 3382b93d9a2a..5205008c8061 100644
--- a/arch/arm/mach-davinci/board-mityomapl138.c
+++ b/arch/arm/mach-davinci/board-mityomapl138.c
@@ -432,7 +432,7 @@ static struct davinci_nand_pdata mityomapl138_nandflash_data = {
 	.core_chipsel	= 1,
 	.parts		= mityomapl138_nandflash_partition,
 	.nr_parts	= ARRAY_SIZE(mityomapl138_nandflash_partition),
-	.ecc_mode	= NAND_ECC_HW,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.bbt_options	= NAND_BBT_USE_FLASH,
 	.options	= NAND_BUSWIDTH_16,
 	.ecc_bits	= 1, /* 4 bit mode is not supported with 16 bit NAND */
diff --git a/arch/arm/mach-davinci/board-neuros-osd2.c b/arch/arm/mach-davinci/board-neuros-osd2.c
index 6cf46bbc7e1d..b4843f68bb57 100644
--- a/arch/arm/mach-davinci/board-neuros-osd2.c
+++ b/arch/arm/mach-davinci/board-neuros-osd2.c
@@ -90,7 +90,7 @@ static struct davinci_nand_pdata davinci_ntosd2_nandflash_data = {
 	.core_chipsel	= 0,
 	.parts		= davinci_ntosd2_nandflash_partition,
 	.nr_parts	= ARRAY_SIZE(davinci_ntosd2_nandflash_partition),
-	.ecc_mode	= NAND_ECC_HW,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.ecc_bits	= 1,
 	.bbt_options	= NAND_BBT_USE_FLASH,
 };
diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c
index 6c79039002c9..88df8011a4e6 100644
--- a/arch/arm/mach-davinci/board-omapl138-hawk.c
+++ b/arch/arm/mach-davinci/board-omapl138-hawk.c
@@ -206,7 +206,7 @@ static struct davinci_nand_pdata omapl138_hawk_nandflash_data = {
 	.core_chipsel	= 1,
 	.parts		= omapl138_hawk_nandflash_partition,
 	.nr_parts	= ARRAY_SIZE(omapl138_hawk_nandflash_partition),
-	.ecc_mode	= NAND_ECC_HW,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST,
 	.ecc_bits	= 4,
 	.bbt_options	= NAND_BBT_USE_FLASH,
 	.options	= NAND_BUSWIDTH_16,
diff --git a/arch/arm/mach-s3c24xx/common-smdk.c b/arch/arm/mach-s3c24xx/common-smdk.c
index 75064dfaceb1..121646ad1bb1 100644
--- a/arch/arm/mach-s3c24xx/common-smdk.c
+++ b/arch/arm/mach-s3c24xx/common-smdk.c
@@ -191,7 +191,7 @@ static struct s3c2410_platform_nand smdk_nand_info = {
 	.twrph1		= 20,
 	.nr_sets	= ARRAY_SIZE(smdk_nand_sets),
 	.sets		= smdk_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 /* devices we initialise */
diff --git a/arch/arm/mach-s3c24xx/mach-anubis.c b/arch/arm/mach-s3c24xx/mach-anubis.c
index 072966dcad78..28326241e360 100644
--- a/arch/arm/mach-s3c24xx/mach-anubis.c
+++ b/arch/arm/mach-s3c24xx/mach-anubis.c
@@ -218,7 +218,7 @@ static struct s3c2410_platform_nand __initdata anubis_nand_info = {
 	.nr_sets	= ARRAY_SIZE(anubis_nand_sets),
 	.sets		= anubis_nand_sets,
 	.select_chip	= anubis_nand_select,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 /* IDE channels */
diff --git a/arch/arm/mach-s3c24xx/mach-at2440evb.c b/arch/arm/mach-s3c24xx/mach-at2440evb.c
index 58c5ef3cf1d7..04dedebdb57c 100644
--- a/arch/arm/mach-s3c24xx/mach-at2440evb.c
+++ b/arch/arm/mach-s3c24xx/mach-at2440evb.c
@@ -109,7 +109,7 @@ static struct s3c2410_platform_nand __initdata at2440evb_nand_info = {
 	.twrph1		= 40,
 	.nr_sets	= ARRAY_SIZE(at2440evb_nand_sets),
 	.sets		= at2440evb_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 /* DM9000AEP 10/100 ethernet controller */
diff --git a/arch/arm/mach-s3c24xx/mach-bast.c b/arch/arm/mach-s3c24xx/mach-bast.c
index a7c3955ae8f6..6465eab0ab3a 100644
--- a/arch/arm/mach-s3c24xx/mach-bast.c
+++ b/arch/arm/mach-s3c24xx/mach-bast.c
@@ -294,7 +294,7 @@ static struct s3c2410_platform_nand __initdata bast_nand_info = {
 	.nr_sets	= ARRAY_SIZE(bast_nand_sets),
 	.sets		= bast_nand_sets,
 	.select_chip	= bast_nand_select,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 /* DM9000 */
diff --git a/arch/arm/mach-s3c24xx/mach-gta02.c b/arch/arm/mach-s3c24xx/mach-gta02.c
index 594901f3b8e5..db1b64f6e0a5 100644
--- a/arch/arm/mach-s3c24xx/mach-gta02.c
+++ b/arch/arm/mach-s3c24xx/mach-gta02.c
@@ -416,7 +416,7 @@ static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 	.twrph1		= 15,
 	.nr_sets	= ARRAY_SIZE(gta02_nand_sets),
 	.sets		= gta02_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 
diff --git a/arch/arm/mach-s3c24xx/mach-jive.c b/arch/arm/mach-s3c24xx/mach-jive.c
index 885e8f12e4b9..8233dcff19e7 100644
--- a/arch/arm/mach-s3c24xx/mach-jive.c
+++ b/arch/arm/mach-s3c24xx/mach-jive.c
@@ -228,7 +228,7 @@ static struct s3c2410_platform_nand __initdata jive_nand_info = {
 	.twrph1		= 40,
 	.sets		= jive_nand_sets,
 	.nr_sets	= ARRAY_SIZE(jive_nand_sets),
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 static int __init jive_mtdset(char *options)
diff --git a/arch/arm/mach-s3c24xx/mach-mini2440.c b/arch/arm/mach-s3c24xx/mach-mini2440.c
index 235749448311..057dcbaf1b22 100644
--- a/arch/arm/mach-s3c24xx/mach-mini2440.c
+++ b/arch/arm/mach-s3c24xx/mach-mini2440.c
@@ -296,7 +296,7 @@ static struct s3c2410_platform_nand mini2440_nand_info __initdata = {
 	.nr_sets	= ARRAY_SIZE(mini2440_nand_sets),
 	.sets		= mini2440_nand_sets,
 	.ignore_unset_ecc = 1,
-	.ecc_mode	= NAND_ECC_HW,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST,
 };
 
 /* DM9000AEP 10/100 ethernet controller */
diff --git a/arch/arm/mach-s3c24xx/mach-osiris.c b/arch/arm/mach-s3c24xx/mach-osiris.c
index ee3630cb236a..157448827f61 100644
--- a/arch/arm/mach-s3c24xx/mach-osiris.c
+++ b/arch/arm/mach-s3c24xx/mach-osiris.c
@@ -234,7 +234,7 @@ static struct s3c2410_platform_nand __initdata osiris_nand_info = {
 	.nr_sets	= ARRAY_SIZE(osiris_nand_sets),
 	.sets		= osiris_nand_sets,
 	.select_chip	= osiris_nand_select,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 /* PCMCIA control and configuration */
diff --git a/arch/arm/mach-s3c24xx/mach-qt2410.c b/arch/arm/mach-s3c24xx/mach-qt2410.c
index ff9e3197309b..f3131d94e90b 100644
--- a/arch/arm/mach-s3c24xx/mach-qt2410.c
+++ b/arch/arm/mach-s3c24xx/mach-qt2410.c
@@ -287,7 +287,7 @@ static struct s3c2410_platform_nand __initdata qt2410_nand_info = {
 	.twrph1		= 20,
 	.nr_sets	= ARRAY_SIZE(qt2410_nand_sets),
 	.sets		= qt2410_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 /* UDC */
diff --git a/arch/arm/mach-s3c24xx/mach-rx1950.c b/arch/arm/mach-s3c24xx/mach-rx1950.c
index fde98b175c75..5ecb42e8a028 100644
--- a/arch/arm/mach-s3c24xx/mach-rx1950.c
+++ b/arch/arm/mach-s3c24xx/mach-rx1950.c
@@ -620,7 +620,7 @@ static struct s3c2410_platform_nand rx1950_nand_info = {
 	.twrph1 = 15,
 	.nr_sets = ARRAY_SIZE(rx1950_nand_sets),
 	.sets = rx1950_nand_sets,
-	.ecc_mode = NAND_ECC_SOFT,
+	.engine_type = NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 static struct s3c2410_udc_mach_info rx1950_udc_cfg __initdata = {
diff --git a/arch/arm/mach-s3c24xx/mach-rx3715.c b/arch/arm/mach-s3c24xx/mach-rx3715.c
index 995f1ff34a1b..017010d67e01 100644
--- a/arch/arm/mach-s3c24xx/mach-rx3715.c
+++ b/arch/arm/mach-s3c24xx/mach-rx3715.c
@@ -158,7 +158,7 @@ static struct s3c2410_platform_nand __initdata rx3715_nand_info = {
 	.twrph1		= 15,
 	.nr_sets	= ARRAY_SIZE(rx3715_nand_sets),
 	.sets		= rx3715_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 static struct platform_device *rx3715_devices[] __initdata = {
diff --git a/arch/arm/mach-s3c24xx/mach-vstms.c b/arch/arm/mach-s3c24xx/mach-vstms.c
index d76b28b65e65..c5fa215a527e 100644
--- a/arch/arm/mach-s3c24xx/mach-vstms.c
+++ b/arch/arm/mach-s3c24xx/mach-vstms.c
@@ -112,7 +112,7 @@ static struct s3c2410_platform_nand __initdata vstms_nand_info = {
 	.twrph1		= 20,
 	.nr_sets	= ARRAY_SIZE(vstms_nand_sets),
 	.sets		= vstms_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 static struct platform_device *vstms_devices[] __initdata = {
diff --git a/arch/arm/mach-s3c64xx/mach-hmt.c b/arch/arm/mach-s3c64xx/mach-hmt.c
index e7080215c624..0d9acaf91701 100644
--- a/arch/arm/mach-s3c64xx/mach-hmt.c
+++ b/arch/arm/mach-s3c64xx/mach-hmt.c
@@ -199,7 +199,7 @@ static struct s3c2410_platform_nand hmt_nand_info = {
 	.twrph1		= 40,
 	.nr_sets	= ARRAY_SIZE(hmt_nand_sets),
 	.sets		= hmt_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 static struct gpio_led hmt_leds[] = {
diff --git a/arch/arm/mach-s3c64xx/mach-mini6410.c b/arch/arm/mach-s3c64xx/mach-mini6410.c
index 0dd36ae49e6a..6fbb57878746 100644
--- a/arch/arm/mach-s3c64xx/mach-mini6410.c
+++ b/arch/arm/mach-s3c64xx/mach-mini6410.c
@@ -136,7 +136,7 @@ static struct s3c2410_platform_nand mini6410_nand_info = {
 	.twrph1		= 40,
 	.nr_sets	= ARRAY_SIZE(mini6410_nand_sets),
 	.sets		= mini6410_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 static struct s3c_fb_pd_win mini6410_lcd_type0_fb_win = {
diff --git a/arch/arm/mach-s3c64xx/mach-real6410.c b/arch/arm/mach-s3c64xx/mach-real6410.c
index 0ff88b6859c4..1e98e530a6aa 100644
--- a/arch/arm/mach-s3c64xx/mach-real6410.c
+++ b/arch/arm/mach-s3c64xx/mach-real6410.c
@@ -188,7 +188,7 @@ static struct s3c2410_platform_nand real6410_nand_info = {
 	.twrph1		= 40,
 	.nr_sets	= ARRAY_SIZE(real6410_nand_sets),
 	.sets		= real6410_nand_sets,
-	.ecc_mode       = NAND_ECC_SOFT,
+	.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT,
 };
 
 static struct platform_device *real6410_devices[] __initdata = {
diff --git a/drivers/mtd/nand/raw/ams-delta.c b/drivers/mtd/nand/raw/ams-delta.c
index 21199d9ae9be..770d4f1001bb 100644
--- a/drivers/mtd/nand/raw/ams-delta.c
+++ b/drivers/mtd/nand/raw/ams-delta.c
@@ -260,7 +260,7 @@ static int gpio_nand_probe(struct platform_device *pdev)
 		return err;
 	}
 
-	this->ecc.mode = NAND_ECC_SOFT;
+	this->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	this->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	platform_set_drvdata(pdev, priv);
diff --git a/drivers/mtd/nand/raw/arasan-nand-controller.c b/drivers/mtd/nand/raw/arasan-nand-controller.c
index b0616a95340d..006bc3d3ce20 100644
--- a/drivers/mtd/nand/raw/arasan-nand-controller.c
+++ b/drivers/mtd/nand/raw/arasan-nand-controller.c
@@ -1056,17 +1056,17 @@ static int anfc_attach_chip(struct nand_chip *chip)
 	chip->ecc.read_page_raw = nand_monolithic_read_page_raw;
 	chip->ecc.write_page_raw = nand_monolithic_write_page_raw;
 
-	switch (chip->ecc.mode) {
-	case NAND_ECC_NONE:
-	case NAND_ECC_SOFT:
-	case NAND_ECC_ON_DIE:
+	switch (chip->ecc.engine_type) {
+	case NAND_ECC_ENGINE_TYPE_NONE:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
+	case NAND_ECC_ENGINE_TYPE_ON_DIE:
 		break;
-	case NAND_ECC_HW:
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		ret = anfc_init_hw_ecc_controller(nfc, chip);
 		break;
 	default:
 		dev_err(nfc->dev, "Unsupported ECC mode: %d\n",
-			chip->ecc.mode);
+			chip->ecc.engine_type);
 		return -EINVAL;
 	}
 
diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index 8999571bfa5d..0d9cd7faf00d 100644
--- a/drivers/mtd/nand/raw/atmel/nand-controller.c
+++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
@@ -1118,15 +1118,15 @@ static int atmel_nand_ecc_init(struct nand_chip *chip)
 
 	nc = to_nand_controller(chip->controller);
 
-	switch (chip->ecc.mode) {
-	case NAND_ECC_NONE:
-	case NAND_ECC_SOFT:
+	switch (chip->ecc.engine_type) {
+	case NAND_ECC_ENGINE_TYPE_NONE:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		/*
 		 * Nothing to do, the core will initialize everything for us.
 		 */
 		break;
 
-	case NAND_ECC_HW:
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		ret = atmel_nand_pmecc_init(chip);
 		if (ret)
 			return ret;
@@ -1140,7 +1140,7 @@ static int atmel_nand_ecc_init(struct nand_chip *chip)
 	default:
 		/* Other modes are not supported. */
 		dev_err(nc->dev, "Unsupported ECC mode: %d\n",
-			chip->ecc.mode);
+			chip->ecc.engine_type);
 		return -ENOTSUPP;
 	}
 
@@ -1155,7 +1155,7 @@ static int atmel_hsmc_nand_ecc_init(struct nand_chip *chip)
 	if (ret)
 		return ret;
 
-	if (chip->ecc.mode != NAND_ECC_HW)
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST)
 		return 0;
 
 	/* Adjust the ECC operations for the HSMC IP. */
@@ -1498,7 +1498,7 @@ static void atmel_nand_init(struct atmel_nand_controller *nc,
 
 	/* Default to HW ECC if pmecc is available. */
 	if (nc->pmecc)
-		chip->ecc.mode = NAND_ECC_HW;
+		chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 }
 
 static void atmel_smc_nand_init(struct atmel_nand_controller *nc,
diff --git a/drivers/mtd/nand/raw/au1550nd.c b/drivers/mtd/nand/raw/au1550nd.c
index ec2d90ad87de..79b057400fe9 100644
--- a/drivers/mtd/nand/raw/au1550nd.c
+++ b/drivers/mtd/nand/raw/au1550nd.c
@@ -294,7 +294,7 @@ static int au1550nd_probe(struct platform_device *pdev)
 	nand_controller_init(&ctx->controller);
 	ctx->controller.ops = &au1550nd_ops;
 	this->controller = &ctx->controller;
-	this->ecc.mode = NAND_ECC_SOFT;
+	this->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	this->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	if (pd->devwidth)
diff --git a/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c b/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c
index 591775173034..8bb17c5a66c3 100644
--- a/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c
+++ b/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c
@@ -391,7 +391,8 @@ int bcm47xxnflash_ops_bcm4706_init(struct bcm47xxnflash *b47n)
 
 	nand_chip->legacy.chip_delay = 50;
 	b47n->nand_chip.bbt_options = NAND_BBT_USE_FLASH;
-	b47n->nand_chip.ecc.mode = NAND_ECC_NONE; /* TODO: implement ECC */
+	/* TODO: implement ECC */
+	b47n->nand_chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_NONE;
 
 	/* Enable NAND flash access */
 	bcma_cc_set32(b47n->cc, BCMA_CC_4706_FLASHSCFG,
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
index 39f1bf327592..afe27a27cb93 100644
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -2565,9 +2565,9 @@ static int brcmnand_setup_dev(struct brcmnand_host *host)
 	cfg->col_adr_bytes = 2;
 	cfg->blk_adr_bytes = get_blk_adr_bytes(mtd->size, mtd->writesize);
 
-	if (chip->ecc.mode != NAND_ECC_HW) {
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST) {
 		dev_err(ctrl->dev, "only HW ECC supported; selected: %d\n",
-			chip->ecc.mode);
+			chip->ecc.engine_type);
 		return -EINVAL;
 	}
 
@@ -2587,7 +2587,7 @@ static int brcmnand_setup_dev(struct brcmnand_host *host)
 		return -EINVAL;
 	}
 
-	if (chip->ecc.mode != NAND_ECC_NONE &&
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_NONE &&
 	    (!chip->ecc.size || !chip->ecc.strength)) {
 		if (chip->base.eccreq.step_size && chip->base.eccreq.strength) {
 			/* use detected ECC parameters */
@@ -2728,7 +2728,7 @@ static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node *dn)
 	chip->legacy.read_buf = brcmnand_read_buf;
 	chip->legacy.write_buf = brcmnand_write_buf;
 
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.read_page = brcmnand_read_page;
 	chip->ecc.write_page = brcmnand_write_page;
 	chip->ecc.read_page_raw = brcmnand_read_page_raw;
diff --git a/drivers/mtd/nand/raw/cadence-nand-controller.c b/drivers/mtd/nand/raw/cadence-nand-controller.c
index 71516af85f23..db29e5e512df 100644
--- a/drivers/mtd/nand/raw/cadence-nand-controller.c
+++ b/drivers/mtd/nand/raw/cadence-nand-controller.c
@@ -2611,7 +2611,7 @@ static int cadence_nand_attach_chip(struct nand_chip *chip)
 
 	chip->bbt_options |= NAND_BBT_USE_FLASH;
 	chip->bbt_options |= NAND_BBT_NO_OOB;
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 
 	chip->options |= NAND_NO_SUBPAGE_WRITE;
 
@@ -2757,7 +2757,7 @@ static int cadence_nand_chip_init(struct cdns_nand_ctrl *cdns_ctrl,
 	 * Default to HW ECC engine mode. If the nand-ecc-mode property is given
 	 * in the DT node, this entry will be overwritten in nand_scan_ident().
 	 */
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 
 	ret = nand_scan(chip, cdns_chip->nsels);
 	if (ret) {
diff --git a/drivers/mtd/nand/raw/cafe_nand.c b/drivers/mtd/nand/raw/cafe_nand.c
index 2bf8ab542e38..2b94f385a1a8 100644
--- a/drivers/mtd/nand/raw/cafe_nand.c
+++ b/drivers/mtd/nand/raw/cafe_nand.c
@@ -629,7 +629,7 @@ static int cafe_nand_attach_chip(struct nand_chip *chip)
 		goto out_free_dma;
 	}
 
-	cafe->nand.ecc.mode = NAND_ECC_HW;
+	cafe->nand.ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	cafe->nand.ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
 	cafe->nand.ecc.size = mtd->writesize;
 	cafe->nand.ecc.bytes = 14;
diff --git a/drivers/mtd/nand/raw/cs553x_nand.c b/drivers/mtd/nand/raw/cs553x_nand.c
index 9472bf798ed5..b7f3f6347761 100644
--- a/drivers/mtd/nand/raw/cs553x_nand.c
+++ b/drivers/mtd/nand/raw/cs553x_nand.c
@@ -286,7 +286,7 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
 		goto out_mtd;
 	}
 
-	this->ecc.mode = NAND_ECC_HW;
+	this->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	this->ecc.size = 256;
 	this->ecc.bytes = 3;
 	this->ecc.hwctl  = cs_enable_hwecc;
diff --git a/drivers/mtd/nand/raw/davinci_nand.c b/drivers/mtd/nand/raw/davinci_nand.c
index 3640c7e45e15..58966a9706b1 100644
--- a/drivers/mtd/nand/raw/davinci_nand.c
+++ b/drivers/mtd/nand/raw/davinci_nand.c
@@ -530,11 +530,11 @@ static struct davinci_nand_pdata
 		if (!of_property_read_string(pdev->dev.of_node,
 			"ti,davinci-ecc-mode", &mode)) {
 			if (!strncmp("none", mode, 4))
-				pdata->ecc_mode = NAND_ECC_NONE;
+				pdata->engine_type = NAND_ECC_ENGINE_TYPE_NONE;
 			if (!strncmp("soft", mode, 4))
-				pdata->ecc_mode = NAND_ECC_SOFT;
+				pdata->engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 			if (!strncmp("hw", mode, 2))
-				pdata->ecc_mode = NAND_ECC_HW;
+				pdata->engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 		}
 		if (!of_property_read_u32(pdev->dev.of_node,
 			"ti,davinci-ecc-bits", &prop))
@@ -585,21 +585,21 @@ static int davinci_nand_attach_chip(struct nand_chip *chip)
 	if (IS_ERR(pdata))
 		return PTR_ERR(pdata);
 
-	switch (info->chip.ecc.mode) {
-	case NAND_ECC_NONE:
+	switch (info->chip.ecc.engine_type) {
+	case NAND_ECC_ENGINE_TYPE_NONE:
 		pdata->ecc_bits = 0;
 		break;
-	case NAND_ECC_SOFT:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		pdata->ecc_bits = 0;
 		/*
-		 * This driver expects Hamming based ECC when ecc_mode is set
-		 * to NAND_ECC_SOFT. Force ecc.algo to NAND_ECC_ALGO_HAMMING to
-		 * avoid adding an extra ->ecc_algo field to
-		 * davinci_nand_pdata.
+		 * This driver expects Hamming based ECC when engine_type is set
+		 * to NAND_ECC_ENGINE_TYPE_SOFT. Force ecc.algo to
+		 * NAND_ECC_ALGO_HAMMING to avoid adding an extra ->ecc_algo
+		 * field to davinci_nand_pdata.
 		 */
 		info->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 		break;
-	case NAND_ECC_HW:
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		if (pdata->ecc_bits == 4) {
 			int chunks = mtd->writesize / 512;
 
@@ -850,7 +850,7 @@ static int nand_davinci_probe(struct platform_device *pdev)
 	info->mask_cle		= pdata->mask_cle ? : MASK_CLE;
 
 	/* Use board-specific ECC config */
-	info->chip.ecc.mode	= pdata->ecc_mode;
+	info->chip.ecc.engine_type = pdata->engine_type;
 	info->chip.ecc.placement = pdata->ecc_placement;
 
 	spin_lock_irq(&davinci_nand_lock);
diff --git a/drivers/mtd/nand/raw/denali.c b/drivers/mtd/nand/raw/denali.c
index 0e54b8a61cf0..fa2439cb4daa 100644
--- a/drivers/mtd/nand/raw/denali.c
+++ b/drivers/mtd/nand/raw/denali.c
@@ -1237,7 +1237,7 @@ int denali_chip_init(struct denali_controller *denali,
 	chip->bbt_options |= NAND_BBT_USE_FLASH;
 	chip->bbt_options |= NAND_BBT_NO_OOB;
 	chip->options |= NAND_NO_SUBPAGE_WRITE;
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
 	chip->ecc.read_page = denali_read_page;
 	chip->ecc.write_page = denali_write_page;
diff --git a/drivers/mtd/nand/raw/diskonchip.c b/drivers/mtd/nand/raw/diskonchip.c
index 40360352136b..94432a453e5e 100644
--- a/drivers/mtd/nand/raw/diskonchip.c
+++ b/drivers/mtd/nand/raw/diskonchip.c
@@ -1456,7 +1456,7 @@ static int __init doc_probe(unsigned long physadr)
 	nand->ecc.calculate	= doc200x_calculate_ecc;
 	nand->ecc.correct	= doc200x_correct_data;
 
-	nand->ecc.mode		= NAND_ECC_HW;
+	nand->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST;
 	nand->ecc.placement	= NAND_ECC_PLACEMENT_INTERLEAVED;
 	nand->ecc.size		= 512;
 	nand->ecc.bytes		= 6;
diff --git a/drivers/mtd/nand/raw/fsl_elbc_nand.c b/drivers/mtd/nand/raw/fsl_elbc_nand.c
index da89389faaae..b2af7f81fdf8 100644
--- a/drivers/mtd/nand/raw/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_elbc_nand.c
@@ -244,7 +244,7 @@ static int fsl_elbc_run_command(struct mtd_info *mtd)
 		return -EIO;
 	}
 
-	if (chip->ecc.mode != NAND_ECC_HW)
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST)
 		return 0;
 
 	elbc_fcm_ctrl->max_bitflips = 0;
@@ -727,12 +727,12 @@ static int fsl_elbc_attach_chip(struct nand_chip *chip)
 	struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
 	unsigned int al;
 
-	switch (chip->ecc.mode) {
+	switch (chip->ecc.engine_type) {
 	/*
 	 * if ECC was not chosen in DT, decide whether to use HW or SW ECC from
 	 * CS Base Register
 	 */
-	case NAND_ECC_NONE:
+	case NAND_ECC_ENGINE_TYPE_NONE:
 		/* If CS Base Register selects full hardware ECC then use it */
 		if ((in_be32(&lbc->bank[priv->bank].br) & BR_DECC) ==
 		    BR_DECC_CHK_GEN) {
@@ -740,23 +740,23 @@ static int fsl_elbc_attach_chip(struct nand_chip *chip)
 			chip->ecc.write_page = fsl_elbc_write_page;
 			chip->ecc.write_subpage = fsl_elbc_write_subpage;
 
-			chip->ecc.mode = NAND_ECC_HW;
+			chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 			mtd_set_ooblayout(mtd, &fsl_elbc_ooblayout_ops);
 			chip->ecc.size = 512;
 			chip->ecc.bytes = 3;
 			chip->ecc.strength = 1;
 		} else {
 			/* otherwise fall back to default software ECC */
-			chip->ecc.mode = NAND_ECC_SOFT;
+			chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 			chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		}
 		break;
 
 	/* if SW ECC was chosen in DT, we do not need to set anything here */
-	case NAND_ECC_SOFT:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		break;
 
-	/* should we also implement NAND_ECC_HW to do as the code above? */
+	/* should we also implement *_ECC_ENGINE_CONTROLLER to do as above? */
 	default:
 		return -EINVAL;
 	}
@@ -786,8 +786,8 @@ static int fsl_elbc_attach_chip(struct nand_chip *chip)
 	        chip->page_shift);
 	dev_dbg(priv->dev, "fsl_elbc_init: nand->phys_erase_shift = %d\n",
 	        chip->phys_erase_shift);
-	dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.mode = %d\n",
-	        chip->ecc.mode);
+	dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.engine_type = %d\n",
+		chip->ecc.engine_type);
 	dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.steps = %d\n",
 	        chip->ecc.steps);
 	dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.bytes = %d\n",
diff --git a/drivers/mtd/nand/raw/fsl_ifc_nand.c b/drivers/mtd/nand/raw/fsl_ifc_nand.c
index b2ae759dd14e..0e7a9b64301e 100644
--- a/drivers/mtd/nand/raw/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_ifc_nand.c
@@ -309,7 +309,7 @@ static void fsl_ifc_cmdfunc(struct nand_chip *chip, unsigned int command,
 		ifc_nand_ctrl->read_bytes = mtd->writesize + mtd->oobsize;
 		ifc_nand_ctrl->index += column;
 
-		if (chip->ecc.mode == NAND_ECC_HW)
+		if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST)
 			ifc_nand_ctrl->eccread = 1;
 
 		fsl_ifc_do_read(chip, 0, mtd);
@@ -724,8 +724,8 @@ static int fsl_ifc_attach_chip(struct nand_chip *chip)
 							chip->page_shift);
 	dev_dbg(priv->dev, "%s: nand->phys_erase_shift = %d\n", __func__,
 							chip->phys_erase_shift);
-	dev_dbg(priv->dev, "%s: nand->ecc.mode = %d\n", __func__,
-							chip->ecc.mode);
+	dev_dbg(priv->dev, "%s: nand->ecc.engine_type = %d\n", __func__,
+							chip->ecc.engine_type);
 	dev_dbg(priv->dev, "%s: nand->ecc.steps = %d\n", __func__,
 							chip->ecc.steps);
 	dev_dbg(priv->dev, "%s: nand->ecc.bytes = %d\n", __func__,
@@ -912,7 +912,7 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
 
 	/* Must also set CSOR_NAND_ECC_ENC_EN if DEC_EN set */
 	if (csor & CSOR_NAND_ECC_DEC_EN) {
-		chip->ecc.mode = NAND_ECC_HW;
+		chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 		mtd_set_ooblayout(mtd, &fsl_ifc_ooblayout_ops);
 
 		/* Hardware generates ECC per 512 Bytes */
@@ -925,7 +925,7 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
 			chip->ecc.strength = 8;
 		}
 	} else {
-		chip->ecc.mode = NAND_ECC_SOFT;
+		chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 	}
 
diff --git a/drivers/mtd/nand/raw/fsl_upm.c b/drivers/mtd/nand/raw/fsl_upm.c
index 04cf7d14082a..d5813b9abc8e 100644
--- a/drivers/mtd/nand/raw/fsl_upm.c
+++ b/drivers/mtd/nand/raw/fsl_upm.c
@@ -47,7 +47,7 @@ static int fun_chip_init(struct fsl_upm_nand *fun,
 	int ret;
 	struct device_node *flash_np;
 
-	fun->chip.ecc.mode = NAND_ECC_SOFT;
+	fun->chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	fun->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 	fun->chip.controller = &fun->base;
 	mtd->dev.parent = fun->dev;
diff --git a/drivers/mtd/nand/raw/fsmc_nand.c b/drivers/mtd/nand/raw/fsmc_nand.c
index 580b9fe8ca42..4191831df182 100644
--- a/drivers/mtd/nand/raw/fsmc_nand.c
+++ b/drivers/mtd/nand/raw/fsmc_nand.c
@@ -900,8 +900,8 @@ static int fsmc_nand_attach_chip(struct nand_chip *nand)
 		return 0;
 	}
 
-	switch (nand->ecc.mode) {
-	case NAND_ECC_HW:
+	switch (nand->ecc.engine_type) {
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		dev_info(host->dev, "Using 1-bit HW ECC scheme\n");
 		nand->ecc.calculate = fsmc_read_hwecc_ecc1;
 		nand->ecc.correct = nand_correct_data;
@@ -910,14 +910,14 @@ static int fsmc_nand_attach_chip(struct nand_chip *nand)
 		nand->ecc.options |= NAND_ECC_SOFT_HAMMING_SM_ORDER;
 		break;
 
-	case NAND_ECC_SOFT:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		if (nand->ecc.algo == NAND_ECC_ALGO_BCH) {
 			dev_info(host->dev,
 				 "Using 4-bit SW BCH ECC scheme\n");
 			break;
 		}
 
-	case NAND_ECC_ON_DIE:
+	case NAND_ECC_ENGINE_TYPE_ON_DIE:
 		break;
 
 	default:
@@ -929,7 +929,7 @@ static int fsmc_nand_attach_chip(struct nand_chip *nand)
 	 * Don't set layout for BCH4 SW ECC. This will be
 	 * generated later in nand_bch_init() later.
 	 */
-	if (nand->ecc.mode == NAND_ECC_HW) {
+	if (nand->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST) {
 		switch (mtd->oobsize) {
 		case 16:
 		case 64:
@@ -1059,7 +1059,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 	 * Setup default ECC mode. nand_dt_init() called from nand_scan_ident()
 	 * can overwrite this value if the DT provides a different value.
 	 */
-	nand->ecc.mode = NAND_ECC_HW;
+	nand->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	nand->ecc.hwctl = fsmc_enable_hwecc;
 	nand->ecc.size = 512;
 	nand->badblockbits = 7;
diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index c8f498eaabeb..4ec0a1e10867 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -342,7 +342,7 @@ static int gpio_nand_probe(struct platform_device *pdev)
 	gpiomtd->base.ops = &gpio_nand_ops;
 
 	nand_set_flash_node(chip, pdev->dev.of_node);
-	chip->ecc.mode		= NAND_ECC_SOFT;
+	chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_SOFT;
 	chip->ecc.algo		= NAND_ECC_ALGO_HAMMING;
 	chip->options		= gpiomtd->plat.options;
 	chip->controller	= &gpiomtd->base;
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index 5d4aee46cc55..9b015d360a50 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -2032,7 +2032,7 @@ static int gpmi_init_last(struct gpmi_nand_data *this)
 	ecc->write_page_raw = gpmi_ecc_write_page_raw;
 	ecc->read_oob_raw = gpmi_ecc_read_oob_raw;
 	ecc->write_oob_raw = gpmi_ecc_write_oob_raw;
-	ecc->mode	= NAND_ECC_HW;
+	ecc->engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	ecc->size	= bch_geo->ecc_chunk_size;
 	ecc->strength	= bch_geo->ecc_strength;
 	mtd_set_ooblayout(mtd, &gpmi_ooblayout_ops);
diff --git a/drivers/mtd/nand/raw/hisi504_nand.c b/drivers/mtd/nand/raw/hisi504_nand.c
index b84238e2268a..8b2122ce6ec3 100644
--- a/drivers/mtd/nand/raw/hisi504_nand.c
+++ b/drivers/mtd/nand/raw/hisi504_nand.c
@@ -186,7 +186,7 @@ static void hisi_nfc_dma_transfer(struct hinfc_host *host, int todev)
 	hinfc_write(host, host->dma_buffer, HINFC504_DMA_ADDR_DATA);
 	hinfc_write(host, host->dma_oob, HINFC504_DMA_ADDR_OOB);
 
-	if (chip->ecc.mode == NAND_ECC_NONE) {
+	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_NONE) {
 		hinfc_write(host, ((mtd->oobsize & HINFC504_DMA_LEN_OOB_MASK)
 			<< HINFC504_DMA_LEN_OOB_SHIFT), HINFC504_DMA_LEN);
 
@@ -468,7 +468,7 @@ static void hisi_nfc_cmdfunc(struct nand_chip *chip, unsigned command,
 
 	case NAND_CMD_STATUS:
 		flag = hinfc_read(host, HINFC504_CON);
-		if (chip->ecc.mode == NAND_ECC_HW)
+		if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST)
 			hinfc_write(host,
 				    flag & ~(HINFC504_CON_ECCTYPE_MASK <<
 				    HINFC504_CON_ECCTYPE_SHIFT), HINFC504_CON);
@@ -721,7 +721,7 @@ static int hisi_nfc_attach_chip(struct nand_chip *chip)
 	}
 	hinfc_write(host, flag, HINFC504_CON);
 
-	if (chip->ecc.mode == NAND_ECC_HW)
+	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST)
 		hisi_nfc_ecc_probe(host);
 
 	return 0;
diff --git a/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c b/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
index 69423bb29adb..70309f18124c 100644
--- a/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
+++ b/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
@@ -194,8 +194,8 @@ static int ingenic_nand_attach_chip(struct nand_chip *chip)
 				  (chip->ecc.strength / 8);
 	}
 
-	switch (chip->ecc.mode) {
-	case NAND_ECC_HW:
+	switch (chip->ecc.engine_type) {
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		if (!nfc->ecc) {
 			dev_err(nfc->dev, "HW ECC selected, but ECC controller not found\n");
 			return -ENODEV;
@@ -205,22 +205,22 @@ static int ingenic_nand_attach_chip(struct nand_chip *chip)
 		chip->ecc.calculate = ingenic_nand_ecc_calculate;
 		chip->ecc.correct = ingenic_nand_ecc_correct;
 		fallthrough;
-	case NAND_ECC_SOFT:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		dev_info(nfc->dev, "using %s (strength %d, size %d, bytes %d)\n",
 			 (nfc->ecc) ? "hardware ECC" : "software ECC",
 			 chip->ecc.strength, chip->ecc.size, chip->ecc.bytes);
 		break;
-	case NAND_ECC_NONE:
+	case NAND_ECC_ENGINE_TYPE_NONE:
 		dev_info(nfc->dev, "not using ECC\n");
 		break;
 	default:
 		dev_err(nfc->dev, "ECC mode %d not supported\n",
-			chip->ecc.mode);
+			chip->ecc.engine_type);
 		return -EINVAL;
 	}
 
 	/* The NAND core will generate the ECC layout for SW ECC */
-	if (chip->ecc.mode != NAND_ECC_HW)
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST)
 		return 0;
 
 	/* Generate ECC layout. ECC codes are right aligned in the OOB area. */
@@ -404,7 +404,7 @@ static int ingenic_nand_init_chip(struct platform_device *pdev,
 	mtd->dev.parent = dev;
 
 	chip->options = NAND_NO_SUBPAGE_WRITE;
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->controller = &nfc->controller;
 	nand_set_flash_node(chip, np);
 
diff --git a/drivers/mtd/nand/raw/lpc32xx_mlc.c b/drivers/mtd/nand/raw/lpc32xx_mlc.c
index 7521038af2ef..4940bb2e3c07 100644
--- a/drivers/mtd/nand/raw/lpc32xx_mlc.c
+++ b/drivers/mtd/nand/raw/lpc32xx_mlc.c
@@ -656,7 +656,7 @@ static int lpc32xx_nand_attach_chip(struct nand_chip *chip)
 	if (!host->dummy_buf)
 		return -ENOMEM;
 
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.size = 512;
 	mtd_set_ooblayout(mtd, &lpc32xx_ooblayout_ops);
 	host->mlcsubpages = mtd->writesize / 512;
diff --git a/drivers/mtd/nand/raw/lpc32xx_slc.c b/drivers/mtd/nand/raw/lpc32xx_slc.c
index ccb189c8e343..6db9d2ed6881 100644
--- a/drivers/mtd/nand/raw/lpc32xx_slc.c
+++ b/drivers/mtd/nand/raw/lpc32xx_slc.c
@@ -881,7 +881,7 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, host);
 
 	/* NAND callbacks for LPC32xx SLC hardware */
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
 	chip->legacy.read_byte = lpc32xx_nand_read_byte;
 	chip->legacy.read_buf = lpc32xx_nand_read_buf;
diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c
index b2200aa787f2..88f8ed051226 100644
--- a/drivers/mtd/nand/raw/marvell_nand.c
+++ b/drivers/mtd/nand/raw/marvell_nand.c
@@ -2250,7 +2250,8 @@ static int marvell_nand_ecc_init(struct mtd_info *mtd,
 	struct marvell_nfc *nfc = to_marvell_nfc(chip->controller);
 	int ret;
 
-	if (ecc->mode != NAND_ECC_NONE && (!ecc->size || !ecc->strength)) {
+	if (ecc->engine_type != NAND_ECC_ENGINE_TYPE_NONE &&
+	    (!ecc->size || !ecc->strength)) {
 		if (chip->base.eccreq.step_size && chip->base.eccreq.strength) {
 			ecc->size = chip->base.eccreq.step_size;
 			ecc->strength = chip->base.eccreq.strength;
@@ -2262,15 +2263,15 @@ static int marvell_nand_ecc_init(struct mtd_info *mtd,
 		}
 	}
 
-	switch (ecc->mode) {
-	case NAND_ECC_HW:
+	switch (ecc->engine_type) {
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		ret = marvell_nand_hw_ecc_controller_init(mtd, ecc);
 		if (ret)
 			return ret;
 		break;
-	case NAND_ECC_NONE:
-	case NAND_ECC_SOFT:
-	case NAND_ECC_ON_DIE:
+	case NAND_ECC_ENGINE_TYPE_NONE:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
+	case NAND_ECC_ENGINE_TYPE_ON_DIE:
 		if (!nfc->caps->is_nfcv2 && mtd->writesize != SZ_512 &&
 		    mtd->writesize != SZ_2K) {
 			dev_err(nfc->dev, "NFCv1 cannot write %d bytes pages\n",
@@ -2467,7 +2468,7 @@ static int marvell_nand_attach_chip(struct nand_chip *chip)
 		return ret;
 	}
 
-	if (chip->ecc.mode == NAND_ECC_HW) {
+	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST) {
 		/*
 		 * Subpage write not available with hardware ECC, prohibit also
 		 * subpage read as in userspace subpage access would still be
@@ -2642,7 +2643,7 @@ static int marvell_nand_chip_init(struct device *dev, struct marvell_nfc *nfc,
 	 * Default to HW ECC engine mode. If the nand-ecc-mode property is given
 	 * in the DT node, this entry will be overwritten in nand_scan_ident().
 	 */
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 
 	/*
 	 * Save a reference value for timing registers before
diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index 0e5829a2b54f..48e6dac96be6 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -1197,7 +1197,7 @@ static int meson_nand_attach_chip(struct nand_chip *nand)
 	if (ret)
 		return -EINVAL;
 
-	nand->ecc.mode = NAND_ECC_HW;
+	nand->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	nand->ecc.write_page_raw = meson_nfc_write_page_raw;
 	nand->ecc.write_page = meson_nfc_write_page_hwecc;
 	nand->ecc.write_oob_raw = nand_write_oob_std;
diff --git a/drivers/mtd/nand/raw/mpc5121_nfc.c b/drivers/mtd/nand/raw/mpc5121_nfc.c
index a67eded226db..dfd0d3ed5ed0 100644
--- a/drivers/mtd/nand/raw/mpc5121_nfc.c
+++ b/drivers/mtd/nand/raw/mpc5121_nfc.c
@@ -688,7 +688,7 @@ static int mpc5121_nfc_probe(struct platform_device *op)
 	chip->legacy.set_features = nand_get_set_features_notsupp;
 	chip->legacy.get_features = nand_get_set_features_notsupp;
 	chip->bbt_options = NAND_BBT_USE_FLASH;
-	chip->ecc.mode = NAND_ECC_SOFT;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	/* Support external chip-select logic on ADS5121 board */
diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c
index ad1b55dab211..42966fe22d8b 100644
--- a/drivers/mtd/nand/raw/mtk_nand.c
+++ b/drivers/mtd/nand/raw/mtk_nand.c
@@ -1258,8 +1258,8 @@ static int mtk_nfc_ecc_init(struct device *dev, struct mtd_info *mtd)
 	int free, ret;
 
 	/* support only ecc hw mode */
-	if (nand->ecc.mode != NAND_ECC_HW) {
-		dev_err(dev, "ecc.mode not supported\n");
+	if (nand->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST) {
+		dev_err(dev, "ecc.engine_type not supported\n");
 		return -EINVAL;
 	}
 
@@ -1416,7 +1416,7 @@ static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc,
 	nand->options |= NAND_USES_DMA | NAND_SUBPAGE_READ;
 
 	/* set default mode in case dt entry is missing */
-	nand->ecc.mode = NAND_ECC_HW;
+	nand->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 
 	nand->ecc.write_subpage = mtk_nfc_write_subpage_hwecc;
 	nand->ecc.write_page_raw = mtk_nfc_write_page_raw;
diff --git a/drivers/mtd/nand/raw/mxc_nand.c b/drivers/mtd/nand/raw/mxc_nand.c
index 65448fb223b8..d4200eb2ad32 100644
--- a/drivers/mtd/nand/raw/mxc_nand.c
+++ b/drivers/mtd/nand/raw/mxc_nand.c
@@ -669,7 +669,7 @@ static void mxc_nand_enable_hwecc_v1_v2(struct nand_chip *chip, bool enable)
 	struct mxc_nand_host *host = nand_get_controller_data(chip);
 	uint16_t config1;
 
-	if (chip->ecc.mode != NAND_ECC_HW)
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST)
 		return;
 
 	config1 = readw(NFC_V1_V2_CONFIG1);
@@ -687,7 +687,7 @@ static void mxc_nand_enable_hwecc_v3(struct nand_chip *chip, bool enable)
 	struct mxc_nand_host *host = nand_get_controller_data(chip);
 	uint32_t config2;
 
-	if (chip->ecc.mode != NAND_ECC_HW)
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST)
 		return;
 
 	config2 = readl(NFC_V3_CONFIG2);
@@ -1117,7 +1117,8 @@ static void preset_v1(struct mtd_info *mtd)
 	struct mxc_nand_host *host = nand_get_controller_data(nand_chip);
 	uint16_t config1 = 0;
 
-	if (nand_chip->ecc.mode == NAND_ECC_HW && mtd->writesize)
+	if (nand_chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST &&
+	    mtd->writesize)
 		config1 |= NFC_V1_V2_CONFIG1_ECC_EN;
 
 	if (!host->devtype_data->irqpending_quirk)
@@ -1227,7 +1228,7 @@ static void preset_v2(struct mtd_info *mtd)
 	if (mtd->writesize) {
 		uint16_t pages_per_block = mtd->erasesize / mtd->writesize;
 
-		if (nand_chip->ecc.mode == NAND_ECC_HW)
+		if (nand_chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST)
 			config1 |= NFC_V1_V2_CONFIG1_ECC_EN;
 
 		host->eccsize = get_eccsize(mtd);
@@ -1303,7 +1304,7 @@ static void preset_v3(struct mtd_info *mtd)
 	}
 
 	if (mtd->writesize) {
-		if (chip->ecc.mode == NAND_ECC_HW)
+		if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST)
 			config2 |= NFC_V3_CONFIG2_ECC_EN;
 
 		config2 |= NFC_V3_CONFIG2_PPB(
@@ -1680,8 +1681,8 @@ static int mxcnd_attach_chip(struct nand_chip *chip)
 	struct mxc_nand_host *host = nand_get_controller_data(chip);
 	struct device *dev = mtd->dev.parent;
 
-	switch (chip->ecc.mode) {
-	case NAND_ECC_HW:
+	switch (chip->ecc.engine_type) {
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		chip->ecc.read_page = mxc_nand_read_page;
 		chip->ecc.read_page_raw = mxc_nand_read_page_raw;
 		chip->ecc.read_oob = mxc_nand_read_oob;
@@ -1690,7 +1691,7 @@ static int mxcnd_attach_chip(struct nand_chip *chip)
 		chip->ecc.write_oob = mxc_nand_write_oob;
 		break;
 
-	case NAND_ECC_SOFT:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		break;
 
 	default:
@@ -1728,7 +1729,7 @@ static int mxcnd_attach_chip(struct nand_chip *chip)
 	 */
 	host->used_oobsize = min(mtd->oobsize, 218U);
 
-	if (chip->ecc.mode == NAND_ECC_HW) {
+	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST) {
 		if (is_imx21_nfc(host) || is_imx27_nfc(host))
 			chip->ecc.strength = 1;
 		else
@@ -1843,9 +1844,9 @@ static int mxcnd_probe(struct platform_device *pdev)
 	mtd_set_ooblayout(mtd, host->devtype_data->ooblayout);
 
 	if (host->pdata.hw_ecc) {
-		this->ecc.mode = NAND_ECC_HW;
+		this->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	} else {
-		this->ecc.mode = NAND_ECC_SOFT;
+		this->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 		this->ecc.algo = NAND_ECC_ALGO_HAMMING;
 	}
 
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 5e1f4c1faec0..4256c2c28714 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5046,28 +5046,45 @@ static const char * const nand_ecc_modes[] = {
 	[NAND_ECC_ON_DIE]	= "on-die",
 };
 
-static int of_get_nand_ecc_mode(struct device_node *np)
+static enum nand_ecc_engine_type
+of_get_nand_ecc_engine_type(struct device_node *np)
 {
+	enum nand_ecc_mode eng_type;
 	const char *pm;
-	int err, i;
+	int err;
 
 	err = of_property_read_string(np, "nand-ecc-mode", &pm);
-	if (err < 0)
-		return err;
+	if (err)
+		return NAND_ECC_ENGINE_TYPE_INVALID;
 
-	for (i = NAND_ECC_NONE; i < ARRAY_SIZE(nand_ecc_modes); i++)
-		if (!strcasecmp(pm, nand_ecc_modes[i]))
-			return i;
+	for (eng_type = NAND_ECC_NONE;
+	     eng_type < ARRAY_SIZE(nand_ecc_modes); eng_type++) {
+		if (!strcasecmp(pm, nand_ecc_modes[eng_type])) {
+			switch (eng_type) {
+			case NAND_ECC_NONE:
+				return NAND_ECC_ENGINE_TYPE_NONE;
+			case NAND_ECC_SOFT:
+				return NAND_ECC_ENGINE_TYPE_SOFT;
+			case NAND_ECC_HW:
+			case NAND_ECC_HW_SYNDROME:
+				return NAND_ECC_ENGINE_TYPE_ON_HOST;
+			case NAND_ECC_ON_DIE:
+				return NAND_ECC_ENGINE_TYPE_ON_DIE;
+			default:
+				break;
+			}
+		}
+	}
 
 	/*
 	 * For backward compatibility we support few obsoleted values that don't
-	 * have their mappings into the nand_ecc_mode enum anymore (they were
-	 * merged with other enums).
+	 * have their mappings into the nand_ecc_engine_providers enum anymore
+	 * (they were merged with other enums).
 	 */
 	if (!strcasecmp(pm, "soft_bch"))
-		return NAND_ECC_SOFT;
+		return NAND_ECC_ENGINE_TYPE_SOFT;
 
-	return -ENODEV;
+	return NAND_ECC_ENGINE_TYPE_INVALID;
 }
 
 static const char * const nand_ecc_algos[] = {
@@ -5149,8 +5166,9 @@ static bool of_get_nand_on_flash_bbt(struct device_node *np)
 static int nand_dt_init(struct nand_chip *chip)
 {
 	struct device_node *dn = nand_get_flash_node(chip);
+	enum nand_ecc_engine_type ecc_type;
 	enum nand_ecc_algo ecc_algo;
-	int ecc_mode, ecc_strength, ecc_step;
+	int ecc_strength, ecc_step;
 
 	if (!dn)
 		return 0;
@@ -5164,13 +5182,13 @@ static int nand_dt_init(struct nand_chip *chip)
 	if (of_get_nand_on_flash_bbt(dn))
 		chip->bbt_options |= NAND_BBT_USE_FLASH;
 
-	ecc_mode = of_get_nand_ecc_mode(dn);
+	ecc_type = of_get_nand_ecc_engine_type(dn);
 	ecc_algo = of_get_nand_ecc_algo(dn);
 	ecc_strength = of_get_nand_ecc_strength(dn);
 	ecc_step = of_get_nand_ecc_step_size(dn);
 
-	if (ecc_mode >= 0)
-		chip->ecc.mode = ecc_mode;
+	if (ecc_type != NAND_ECC_ENGINE_TYPE_INVALID)
+		chip->ecc.engine_type = ecc_type;
 
 	if (ecc_algo != NAND_ECC_ALGO_UNKNOWN)
 		chip->ecc.algo = ecc_algo;
@@ -5292,7 +5310,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct nand_ecc_ctrl *ecc = &chip->ecc;
 
-	if (WARN_ON(ecc->mode != NAND_ECC_SOFT))
+	if (WARN_ON(ecc->engine_type != NAND_ECC_ENGINE_TYPE_SOFT))
 		return -EINVAL;
 
 	switch (ecc->algo) {
@@ -5757,7 +5775,8 @@ static int nand_scan_tail(struct nand_chip *chip)
 	 * If no default placement scheme is given, select an appropriate one.
 	 */
 	if (!mtd->ooblayout &&
-	    !(ecc->mode == NAND_ECC_SOFT && ecc->algo == NAND_ECC_ALGO_BCH)) {
+	    !(ecc->engine_type == NAND_ECC_ENGINE_TYPE_SOFT &&
+	      ecc->algo == NAND_ECC_ALGO_BCH)) {
 		switch (mtd->oobsize) {
 		case 8:
 		case 16:
@@ -5775,7 +5794,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 			 * page with ECC layout when ->oobsize <= 128 for
 			 * compatibility reasons.
 			 */
-			if (ecc->mode == NAND_ECC_NONE) {
+			if (ecc->engine_type == NAND_ECC_ENGINE_TYPE_NONE) {
 				mtd_set_ooblayout(mtd,
 						&nand_ooblayout_lp_ops);
 				break;
@@ -5793,8 +5812,9 @@ static int nand_scan_tail(struct nand_chip *chip)
 	 * selected and we have 256 byte pagesize fallback to software ECC
 	 */
 
-	switch (ecc->mode) {
-	case NAND_ECC_HW:
+	switch (ecc->engine_type) {
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
+
 		switch (ecc->placement) {
 		case NAND_ECC_PLACEMENT_UNKNOWN:
 		case NAND_ECC_PLACEMENT_OOB:
@@ -5851,7 +5871,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 			}
 			pr_warn("%d byte HW ECC not possible on %d byte page size, fallback to SW ECC\n",
 				ecc->size, mtd->writesize);
-			ecc->mode = NAND_ECC_SOFT;
+			ecc->engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 			ecc->algo = NAND_ECC_ALGO_HAMMING;
 			break;
 
@@ -5863,7 +5883,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 		}
 		fallthrough;
 
-	case NAND_ECC_SOFT:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		ret = nand_set_ecc_soft_ops(chip);
 		if (ret) {
 			ret = -EINVAL;
@@ -5871,7 +5891,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 		}
 		break;
 
-	case NAND_ECC_ON_DIE:
+	case NAND_ECC_ENGINE_TYPE_ON_DIE:
 		if (!ecc->read_page || !ecc->write_page) {
 			WARN(1, "No ECC functions supplied; on-die ECC not possible\n");
 			ret = -EINVAL;
@@ -5883,8 +5903,8 @@ static int nand_scan_tail(struct nand_chip *chip)
 			ecc->write_oob = nand_write_oob_std;
 		break;
 
-	case NAND_ECC_NONE:
-		pr_warn("NAND_ECC_NONE selected by board driver. This is not recommended!\n");
+	case NAND_ECC_ENGINE_TYPE_NONE:
+		pr_warn("NAND_ECC_ENGINE_TYPE_NONE selected by board driver. This is not recommended!\n");
 		ecc->read_page = nand_read_page_raw;
 		ecc->write_page = nand_write_page_raw;
 		ecc->read_oob = nand_read_oob_std;
@@ -5897,7 +5917,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 		break;
 
 	default:
-		WARN(1, "Invalid NAND_ECC_MODE %d\n", ecc->mode);
+		WARN(1, "Invalid NAND_ECC_MODE %d\n", ecc->engine_type);
 		ret = -EINVAL;
 		goto err_nand_manuf_cleanup;
 	}
@@ -5974,8 +5994,8 @@ static int nand_scan_tail(struct nand_chip *chip)
 	chip->pagecache.page = -1;
 
 	/* Large page NAND with SOFT_ECC should support subpage reads */
-	switch (ecc->mode) {
-	case NAND_ECC_SOFT:
+	switch (ecc->engine_type) {
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		if (chip->page_shift > 9)
 			chip->options |= NAND_SUBPAGE_READ;
 		break;
@@ -6119,7 +6139,7 @@ EXPORT_SYMBOL(nand_scan_with_ids);
  */
 void nand_cleanup(struct nand_chip *chip)
 {
-	if (chip->ecc.mode == NAND_ECC_SOFT &&
+	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_SOFT &&
 	    chip->ecc.algo == NAND_ECC_ALGO_BCH)
 		nand_bch_free((struct nand_bch_control *)chip->ecc.priv);
 
diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
index 2d54a3aa15b1..c43afaf21482 100644
--- a/drivers/mtd/nand/raw/nand_micron.c
+++ b/drivers/mtd/nand/raw/nand_micron.c
@@ -497,13 +497,13 @@ static int micron_nand_init(struct nand_chip *chip)
 	ondie = micron_supports_on_die_ecc(chip);
 
 	if (ondie == MICRON_ON_DIE_MANDATORY &&
-	    chip->ecc.mode != NAND_ECC_ON_DIE) {
+	    chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_DIE) {
 		pr_err("On-die ECC forcefully enabled, not supported\n");
 		ret = -EINVAL;
 		goto err_free_manuf_data;
 	}
 
-	if (chip->ecc.mode == NAND_ECC_ON_DIE) {
+	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_DIE) {
 		if (ondie == MICRON_ON_DIE_UNSUPPORTED) {
 			pr_err("On-die ECC selected but not supported\n");
 			ret = -EINVAL;
diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
index f746c19f3b2c..7ba0516c6247 100644
--- a/drivers/mtd/nand/raw/nand_toshiba.c
+++ b/drivers/mtd/nand/raw/nand_toshiba.c
@@ -273,7 +273,8 @@ static int toshiba_nand_init(struct nand_chip *chip)
 		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 &&
+	if (nand_is_slc(chip) &&
+	    chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_DIE &&
 	    chip->id.data[4] & TOSHIBA_NAND_ID4_IS_BENAND)
 		toshiba_nand_benand_init(chip);
 
diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c
index 1ab849ccaa96..a8048cb8d220 100644
--- a/drivers/mtd/nand/raw/nandsim.c
+++ b/drivers/mtd/nand/raw/nandsim.c
@@ -2234,7 +2234,7 @@ static int ns_attach_chip(struct nand_chip *chip)
 		return -EINVAL;
 	}
 
-	chip->ecc.mode = NAND_ECC_SOFT;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	chip->ecc.algo = NAND_ECC_ALGO_BCH;
 	chip->ecc.size = 512;
 	chip->ecc.strength = bch;
@@ -2274,7 +2274,7 @@ static int __init ns_init_module(void)
 	nsmtd       = nand_to_mtd(chip);
 	nand_set_controller_data(chip, (void *)ns);
 
-	chip->ecc.mode   = NAND_ECC_SOFT;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	chip->ecc.algo   = NAND_ECC_ALGO_HAMMING;
 	/* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */
 	/* and 'badblocks' parameters to work */
diff --git a/drivers/mtd/nand/raw/ndfc.c b/drivers/mtd/nand/raw/ndfc.c
index ed38338c1383..0fb4ba93c41e 100644
--- a/drivers/mtd/nand/raw/ndfc.c
+++ b/drivers/mtd/nand/raw/ndfc.c
@@ -149,7 +149,7 @@ static int ndfc_chip_init(struct ndfc_controller *ndfc,
 	chip->ecc.correct = nand_correct_data;
 	chip->ecc.hwctl = ndfc_enable_hwecc;
 	chip->ecc.calculate = ndfc_calculate_ecc;
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.size = 256;
 	chip->ecc.bytes = 3;
 	chip->ecc.strength = 1;
diff --git a/drivers/mtd/nand/raw/omap2.c b/drivers/mtd/nand/raw/omap2.c
index 967ddbda1c48..512f60780a50 100644
--- a/drivers/mtd/nand/raw/omap2.c
+++ b/drivers/mtd/nand/raw/omap2.c
@@ -884,8 +884,8 @@ static int omap_correct_data(struct nand_chip *chip, u_char *dat,
 	int stat = 0;
 
 	/* Ex NAND_ECC_HW12_2048 */
-	if ((info->nand.ecc.mode == NAND_ECC_HW) &&
-			(info->nand.ecc.size  == 2048))
+	if (info->nand.ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST &&
+	    info->nand.ecc.size == 2048)
 		blockCnt = 4;
 	else
 		blockCnt = 1;
@@ -2006,11 +2006,11 @@ static int omap_nand_attach_chip(struct nand_chip *chip)
 		return -EINVAL;
 
 	/*
-	 * Bail out earlier to let NAND_ECC_SOFT code create its own
+	 * Bail out earlier to let NAND_ECC_ENGINE_TYPE_SOFT code create its own
 	 * ooblayout instead of using ours.
 	 */
 	if (info->ecc_opt == OMAP_ECC_HAM1_CODE_SW) {
-		chip->ecc.mode = NAND_ECC_SOFT;
+		chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		return 0;
 	}
@@ -2019,7 +2019,7 @@ static int omap_nand_attach_chip(struct nand_chip *chip)
 	switch (info->ecc_opt) {
 	case OMAP_ECC_HAM1_CODE_HW:
 		dev_info(dev, "nand: using OMAP_ECC_HAM1_CODE_HW\n");
-		chip->ecc.mode		= NAND_ECC_HW;
+		chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST;
 		chip->ecc.bytes		= 3;
 		chip->ecc.size		= 512;
 		chip->ecc.strength	= 1;
@@ -2036,7 +2036,7 @@ static int omap_nand_attach_chip(struct nand_chip *chip)
 
 	case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
 		pr_info("nand: using OMAP_ECC_BCH4_CODE_HW_DETECTION_SW\n");
-		chip->ecc.mode		= NAND_ECC_HW;
+		chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST;
 		chip->ecc.size		= 512;
 		chip->ecc.bytes		= 7;
 		chip->ecc.strength	= 4;
@@ -2056,7 +2056,7 @@ static int omap_nand_attach_chip(struct nand_chip *chip)
 
 	case OMAP_ECC_BCH4_CODE_HW:
 		pr_info("nand: using OMAP_ECC_BCH4_CODE_HW ECC scheme\n");
-		chip->ecc.mode		= NAND_ECC_HW;
+		chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST;
 		chip->ecc.size		= 512;
 		/* 14th bit is kept reserved for ROM-code compatibility */
 		chip->ecc.bytes		= 7 + 1;
@@ -2078,7 +2078,7 @@ static int omap_nand_attach_chip(struct nand_chip *chip)
 
 	case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW:
 		pr_info("nand: using OMAP_ECC_BCH8_CODE_HW_DETECTION_SW\n");
-		chip->ecc.mode		= NAND_ECC_HW;
+		chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST;
 		chip->ecc.size		= 512;
 		chip->ecc.bytes		= 13;
 		chip->ecc.strength	= 8;
@@ -2098,7 +2098,7 @@ static int omap_nand_attach_chip(struct nand_chip *chip)
 
 	case OMAP_ECC_BCH8_CODE_HW:
 		pr_info("nand: using OMAP_ECC_BCH8_CODE_HW ECC scheme\n");
-		chip->ecc.mode		= NAND_ECC_HW;
+		chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST;
 		chip->ecc.size		= 512;
 		/* 14th bit is kept reserved for ROM-code compatibility */
 		chip->ecc.bytes		= 13 + 1;
@@ -2121,7 +2121,7 @@ static int omap_nand_attach_chip(struct nand_chip *chip)
 
 	case OMAP_ECC_BCH16_CODE_HW:
 		pr_info("Using OMAP_ECC_BCH16_CODE_HW ECC scheme\n");
-		chip->ecc.mode		= NAND_ECC_HW;
+		chip->ecc.engine_type	= NAND_ECC_ENGINE_TYPE_ON_HOST;
 		chip->ecc.size		= 512;
 		chip->ecc.bytes		= 26;
 		chip->ecc.strength	= 16;
diff --git a/drivers/mtd/nand/raw/orion_nand.c b/drivers/mtd/nand/raw/orion_nand.c
index 7a5cfa3d883f..df9c0f8e4b4e 100644
--- a/drivers/mtd/nand/raw/orion_nand.c
+++ b/drivers/mtd/nand/raw/orion_nand.c
@@ -139,7 +139,7 @@ static int __init orion_nand_probe(struct platform_device *pdev)
 	nc->legacy.IO_ADDR_R = nc->legacy.IO_ADDR_W = io_base;
 	nc->legacy.cmd_ctrl = orion_nand_cmd_ctrl;
 	nc->legacy.read_buf = orion_nand_read_buf;
-	nc->ecc.mode = NAND_ECC_SOFT;
+	nc->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	nc->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	if (board->chip_delay)
diff --git a/drivers/mtd/nand/raw/pasemi_nand.c b/drivers/mtd/nand/raw/pasemi_nand.c
index 3eddc284614d..155e8c8f61e2 100644
--- a/drivers/mtd/nand/raw/pasemi_nand.c
+++ b/drivers/mtd/nand/raw/pasemi_nand.c
@@ -132,7 +132,7 @@ static int pasemi_nand_probe(struct platform_device *ofdev)
 	chip->legacy.read_buf = pasemi_read_buf;
 	chip->legacy.write_buf = pasemi_write_buf;
 	chip->legacy.chip_delay = 0;
-	chip->ecc.mode = NAND_ECC_SOFT;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	/* Enable the following for a flash based bad block table */
diff --git a/drivers/mtd/nand/raw/plat_nand.c b/drivers/mtd/nand/raw/plat_nand.c
index dbc089c8872f..b98c0d5c413f 100644
--- a/drivers/mtd/nand/raw/plat_nand.c
+++ b/drivers/mtd/nand/raw/plat_nand.c
@@ -66,7 +66,7 @@ static int plat_nand_probe(struct platform_device *pdev)
 	data->chip.options |= pdata->chip.options;
 	data->chip.bbt_options |= pdata->chip.bbt_options;
 
-	data->chip.ecc.mode = NAND_ECC_SOFT;
+	data->chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	data->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	platform_set_drvdata(pdev, data);
diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index bd7a7251429b..3d616e616b26 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -2550,7 +2550,7 @@ static int qcom_nand_attach_chip(struct nand_chip *chip)
 	ecc->write_page_raw	= qcom_nandc_write_page_raw;
 	ecc->write_oob		= qcom_nandc_write_oob;
 
-	ecc->mode = NAND_ECC_HW;
+	ecc->engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 
 	mtd_set_ooblayout(mtd, &qcom_nand_ooblayout_ops);
 
diff --git a/drivers/mtd/nand/raw/r852.c b/drivers/mtd/nand/raw/r852.c
index f0988cda4479..6b7addd2c420 100644
--- a/drivers/mtd/nand/raw/r852.c
+++ b/drivers/mtd/nand/raw/r852.c
@@ -859,7 +859,7 @@ static int  r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
 	chip->legacy.write_buf = r852_write_buf;
 
 	/* ecc */
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
 	chip->ecc.size = R852_DMA_LEN;
 	chip->ecc.bytes = SM_OOB_SIZE;
diff --git a/drivers/mtd/nand/raw/s3c2410.c b/drivers/mtd/nand/raw/s3c2410.c
index 5a39002d67ef..fbd0fa48e063 100644
--- a/drivers/mtd/nand/raw/s3c2410.c
+++ b/drivers/mtd/nand/raw/s3c2410.c
@@ -904,7 +904,7 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
 	nmtd->info	   = info;
 	nmtd->set	   = set;
 
-	chip->ecc.mode = info->platform->ecc_mode;
+	chip->ecc.engine_type = info->platform->engine_type;
 
 	/*
 	 * If you use u-boot BBT creation code, specifying this flag will
@@ -929,24 +929,24 @@ static int s3c2410_nand_attach_chip(struct nand_chip *chip)
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
 
-	switch (chip->ecc.mode) {
+	switch (chip->ecc.engine_type) {
 
-	case NAND_ECC_NONE:
+	case NAND_ECC_ENGINE_TYPE_NONE:
 		dev_info(info->device, "ECC disabled\n");
 		break;
 
-	case NAND_ECC_SOFT:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		/*
-		 * This driver expects Hamming based ECC when ecc_mode is set
-		 * to NAND_ECC_SOFT. Force ecc.algo to NAND_ECC_ALGO_HAMMING to
-		 * avoid adding an extra ecc_algo field to
-		 * s3c2410_platform_nand.
+		 * This driver expects Hamming based ECC when engine_type is set
+		 * to NAND_ECC_ENGINE_TYPE_SOFT. Force ecc.algo to
+		 * NAND_ECC_ALGO_HAMMING to avoid adding an extra ecc_algo field
+		 * to s3c2410_platform_nand.
 		 */
 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 		dev_info(info->device, "soft ECC\n");
 		break;
 
-	case NAND_ECC_HW:
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		chip->ecc.calculate = s3c2410_nand_calculate_ecc;
 		chip->ecc.correct   = s3c2410_nand_correct_data;
 		chip->ecc.strength  = 1;
diff --git a/drivers/mtd/nand/raw/sh_flctl.c b/drivers/mtd/nand/raw/sh_flctl.c
index 9dbd6fdbe264..13df4bdf792a 100644
--- a/drivers/mtd/nand/raw/sh_flctl.c
+++ b/drivers/mtd/nand/raw/sh_flctl.c
@@ -1039,12 +1039,12 @@ static int flctl_chip_attach_chip(struct nand_chip *chip)
 		chip->ecc.strength = 4;
 		chip->ecc.read_page = flctl_read_page_hwecc;
 		chip->ecc.write_page = flctl_write_page_hwecc;
-		chip->ecc.mode = NAND_ECC_HW;
+		chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 
 		/* 4 symbols ECC enabled */
 		flctl->flcmncr_base |= _4ECCEN;
 	} else {
-		chip->ecc.mode = NAND_ECC_SOFT;
+		chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 		chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 	}
 
diff --git a/drivers/mtd/nand/raw/sharpsl.c b/drivers/mtd/nand/raw/sharpsl.c
index 51286f7acf54..1327bfb3d5d3 100644
--- a/drivers/mtd/nand/raw/sharpsl.c
+++ b/drivers/mtd/nand/raw/sharpsl.c
@@ -157,7 +157,7 @@ static int sharpsl_nand_probe(struct platform_device *pdev)
 	/* 15 us command delay time */
 	this->legacy.chip_delay = 15;
 	/* set eccmode using hardware ECC */
-	this->ecc.mode = NAND_ECC_HW;
+	this->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	this->ecc.size = 256;
 	this->ecc.bytes = 3;
 	this->ecc.strength = 1;
diff --git a/drivers/mtd/nand/raw/socrates_nand.c b/drivers/mtd/nand/raw/socrates_nand.c
index 72a3a7f98282..0f63ff6f7fe7 100644
--- a/drivers/mtd/nand/raw/socrates_nand.c
+++ b/drivers/mtd/nand/raw/socrates_nand.c
@@ -153,7 +153,8 @@ static int socrates_nand_probe(struct platform_device *ofdev)
 	nand_chip->legacy.read_buf = socrates_nand_read_buf;
 	nand_chip->legacy.dev_ready = socrates_nand_device_ready;
 
-	nand_chip->ecc.mode = NAND_ECC_SOFT;	/* enable ECC */
+	/* enable ECC */
+	nand_chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	nand_chip->ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	/* TODO: I have no idea what real delay is. */
diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
index 7f4546ae9130..ba679d2cc743 100644
--- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c
+++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c
@@ -1696,14 +1696,15 @@ static int stm32_fmc2_nfc_attach_chip(struct nand_chip *chip)
 	int ret;
 
 	/*
-	 * Only NAND_ECC_HW mode is actually supported
+	 * Only NAND_ECC_ENGINE_TYPE_ON_HOST mode is actually supported
 	 * Hamming => ecc.strength = 1
 	 * BCH4 => ecc.strength = 4
 	 * BCH8 => ecc.strength = 8
 	 * ECC sector size = 512
 	 */
-	if (chip->ecc.mode != NAND_ECC_HW) {
-		dev_err(nfc->dev, "nand_ecc_mode is not well defined in the DT\n");
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST) {
+		dev_err(nfc->dev,
+			"nand_ecc_engine_type is not well defined in the DT\n");
 		return -EINVAL;
 	}
 
@@ -1952,7 +1953,7 @@ static int stm32_fmc2_nfc_probe(struct platform_device *pdev)
 			 NAND_USES_DMA;
 
 	/* Default ECC settings */
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.size = FMC2_ECC_STEP_SIZE;
 	chip->ecc.strength = FMC2_ECC_BCH8;
 
diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 9c50c2b965e1..c78276de7c37 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1575,7 +1575,7 @@ static int sunxi_nand_ooblayout_free(struct mtd_info *mtd, int section,
 	 * only have 2 bytes available in the first user data
 	 * section.
 	 */
-	if (!section && ecc->mode == NAND_ECC_HW) {
+	if (!section && ecc->engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST) {
 		oobregion->offset = 2;
 		oobregion->length = 2;
 
@@ -1720,11 +1720,11 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
 
 static void sunxi_nand_ecc_cleanup(struct nand_ecc_ctrl *ecc)
 {
-	switch (ecc->mode) {
-	case NAND_ECC_HW:
+	switch (ecc->engine_type) {
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		sunxi_nand_hw_ecc_ctrl_cleanup(ecc);
 		break;
-	case NAND_ECC_NONE:
+	case NAND_ECC_ENGINE_TYPE_NONE:
 	default:
 		break;
 	}
@@ -1752,14 +1752,14 @@ static int sunxi_nand_attach_chip(struct nand_chip *nand)
 	if (!ecc->size || !ecc->strength)
 		return -EINVAL;
 
-	switch (ecc->mode) {
-	case NAND_ECC_HW:
+	switch (ecc->engine_type) {
+	case NAND_ECC_ENGINE_TYPE_ON_HOST:
 		ret = sunxi_nand_hw_ecc_ctrl_init(nand, ecc, np);
 		if (ret)
 			return ret;
 		break;
-	case NAND_ECC_NONE:
-	case NAND_ECC_SOFT:
+	case NAND_ECC_ENGINE_TYPE_NONE:
+	case NAND_ECC_ENGINE_TYPE_SOFT:
 		break;
 	default:
 		return -EINVAL;
@@ -1991,7 +1991,7 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 	 * Set the ECC mode to the default value in case nothing is specified
 	 * in the DT.
 	 */
-	nand->ecc.mode = NAND_ECC_HW;
+	nand->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	nand_set_flash_node(nand, np);
 
 	mtd = nand_to_mtd(nand);
diff --git a/drivers/mtd/nand/raw/tango_nand.c b/drivers/mtd/nand/raw/tango_nand.c
index 021ceef4ad0a..359187b5a4be 100644
--- a/drivers/mtd/nand/raw/tango_nand.c
+++ b/drivers/mtd/nand/raw/tango_nand.c
@@ -549,7 +549,7 @@ static int tango_attach_chip(struct nand_chip *chip)
 {
 	struct nand_ecc_ctrl *ecc = &chip->ecc;
 
-	ecc->mode = NAND_ECC_HW;
+	ecc->engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	ecc->algo = NAND_ECC_ALGO_BCH;
 	ecc->bytes = DIV_ROUND_UP(ecc->strength * FIELD_ORDER, BITS_PER_BYTE);
 
diff --git a/drivers/mtd/nand/raw/tegra_nand.c b/drivers/mtd/nand/raw/tegra_nand.c
index 0d6f3c6d6e11..cc72a2de8891 100644
--- a/drivers/mtd/nand/raw/tegra_nand.c
+++ b/drivers/mtd/nand/raw/tegra_nand.c
@@ -916,7 +916,7 @@ static int tegra_nand_attach_chip(struct nand_chip *chip)
 	if (chip->bbt_options & NAND_BBT_USE_FLASH)
 		chip->bbt_options |= NAND_BBT_NO_OOB;
 
-	chip->ecc.mode = NAND_ECC_HW;
+	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.size = 512;
 	chip->ecc.steps = mtd->writesize / chip->ecc.size;
 	if (chip->base.eccreq.step_size != 512) {
diff --git a/drivers/mtd/nand/raw/tmio_nand.c b/drivers/mtd/nand/raw/tmio_nand.c
index 843a8683b737..235a2f7b1bad 100644
--- a/drivers/mtd/nand/raw/tmio_nand.c
+++ b/drivers/mtd/nand/raw/tmio_nand.c
@@ -410,7 +410,7 @@ static int tmio_probe(struct platform_device *dev)
 	nand_chip->legacy.read_buf = tmio_nand_read_buf;
 
 	/* set eccmode using hardware ECC */
-	nand_chip->ecc.mode = NAND_ECC_HW;
+	nand_chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	nand_chip->ecc.size = 512;
 	nand_chip->ecc.bytes = 6;
 	nand_chip->ecc.strength = 2;
diff --git a/drivers/mtd/nand/raw/txx9ndfmc.c b/drivers/mtd/nand/raw/txx9ndfmc.c
index 47d966871445..ef81dce6b5c4 100644
--- a/drivers/mtd/nand/raw/txx9ndfmc.c
+++ b/drivers/mtd/nand/raw/txx9ndfmc.c
@@ -329,7 +329,7 @@ static int __init txx9ndfmc_probe(struct platform_device *dev)
 		chip->ecc.calculate = txx9ndfmc_calculate_ecc;
 		chip->ecc.correct = txx9ndfmc_correct_data;
 		chip->ecc.hwctl = txx9ndfmc_enable_hwecc;
-		chip->ecc.mode = NAND_ECC_HW;
+		chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 		chip->ecc.strength = 1;
 		chip->legacy.chip_delay = 100;
 		chip->controller = &drvdata->controller;
diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/vf610_nfc.c
index 7248c5901183..8ee2c1f539c4 100644
--- a/drivers/mtd/nand/raw/vf610_nfc.c
+++ b/drivers/mtd/nand/raw/vf610_nfc.c
@@ -732,7 +732,7 @@ static void vf610_nfc_init_controller(struct vf610_nfc *nfc)
 	else
 		vf610_nfc_clear(nfc, NFC_FLASH_CONFIG, CONFIG_16BIT);
 
-	if (nfc->chip.ecc.mode == NAND_ECC_HW) {
+	if (nfc->chip.ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST) {
 		/* Set ECC status offset in SRAM */
 		vf610_nfc_set_field(nfc, NFC_FLASH_CONFIG,
 				    CONFIG_ECC_SRAM_ADDR_MASK,
@@ -761,7 +761,7 @@ static int vf610_nfc_attach_chip(struct nand_chip *chip)
 		return -ENXIO;
 	}
 
-	if (chip->ecc.mode != NAND_ECC_HW)
+	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST)
 		return 0;
 
 	if (mtd->writesize != PAGE_2K && mtd->oobsize < 64) {
diff --git a/drivers/mtd/nand/raw/xway_nand.c b/drivers/mtd/nand/raw/xway_nand.c
index b279ed143b8f..f2dbd63a5c1f 100644
--- a/drivers/mtd/nand/raw/xway_nand.c
+++ b/drivers/mtd/nand/raw/xway_nand.c
@@ -180,7 +180,7 @@ static int xway_nand_probe(struct platform_device *pdev)
 	data->chip.legacy.read_byte = xway_read_byte;
 	data->chip.legacy.chip_delay = 30;
 
-	data->chip.ecc.mode = NAND_ECC_SOFT;
+	data->chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 	data->chip.ecc.algo = NAND_ECC_ALGO_HAMMING;
 
 	platform_set_drvdata(pdev, data);
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index cfd75a12f802..967b616c50df 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -303,7 +303,7 @@ static const struct nand_ecc_caps __name = {			\
 
 /**
  * struct nand_ecc_ctrl - Control structure for ECC
- * @mode:	ECC mode
+ * @engine_type: ECC engine type
  * @placement:	OOB bytes placement
  * @algo:	ECC algorithm
  * @steps:	number of ECC steps per page
@@ -356,7 +356,7 @@ static const struct nand_ecc_caps __name = {			\
  * @write_oob:	function to write chip OOB data
  */
 struct nand_ecc_ctrl {
-	enum nand_ecc_mode mode;
+	enum nand_ecc_engine_type engine_type;
 	enum nand_ecc_placement placement;
 	enum nand_ecc_algo algo;
 	int steps;
diff --git a/include/linux/platform_data/mtd-davinci.h b/include/linux/platform_data/mtd-davinci.h
index 6e2b252a4ce6..dd474dd44848 100644
--- a/include/linux/platform_data/mtd-davinci.h
+++ b/include/linux/platform_data/mtd-davinci.h
@@ -60,15 +60,15 @@ struct davinci_nand_pdata {		/* platform_data */
 	struct mtd_partition	*parts;
 	unsigned		nr_parts;
 
-	/* none  == NAND_ECC_NONE (strongly *not* advised!!)
-	 * soft  == NAND_ECC_SOFT
-	 * else  == NAND_ECC_HW, according to ecc_bits
+	/* none  == NAND_ECC_ENGINE_TYPE_NONE (strongly *not* advised!!)
+	 * soft  == NAND_ECC_ENGINE_TYPE_SOFT
+	 * else  == NAND_ECC_ENGINE_TYPE_ON_HOST, according to ecc_bits
 	 *
 	 * All DaVinci-family chips support 1-bit hardware ECC.
 	 * Newer ones also support 4-bit ECC, but are awkward
 	 * using it with large page chips.
 	 */
-	enum nand_ecc_mode	ecc_mode;
+	enum nand_ecc_engine_type engine_type;
 	enum nand_ecc_placement ecc_placement;
 	u8			ecc_bits;
 
diff --git a/include/linux/platform_data/mtd-nand-s3c2410.h b/include/linux/platform_data/mtd-nand-s3c2410.h
index 08675b16f9e1..25390fc3e795 100644
--- a/include/linux/platform_data/mtd-nand-s3c2410.h
+++ b/include/linux/platform_data/mtd-nand-s3c2410.h
@@ -49,7 +49,7 @@ struct s3c2410_platform_nand {
 
 	unsigned int	ignore_unset_ecc:1;
 
-	enum nand_ecc_mode	ecc_mode;
+	enum nand_ecc_engine_type engine_type;
 
 	int			nr_sets;
 	struct s3c2410_nand_set *sets;
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 11/20] mtd: nand: Create a helper to extract the ECC configuration
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (9 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 10/20] mtd: rawnand: Use the new ECC engine type enumeration Miquel Raynal
@ 2020-08-27  8:51 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:52 ` [PATCH v13 12/20] mtd: spinand: Use nanddev_get_ecc_conf() when relevant Miquel Raynal
                   ` (8 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:51 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Despite its current name, the eccreq field actually encodes both the
NAND requirements and the final ECC configuration. That works fine when
using on-die ECC since those 2 concepts match perfectly, but it starts
being a problem as soon as we use on-host ECC engines, where we're not
guaranteed to have a perfect match.

Let's hide the ECC configuration access behind a helper so we can later
split those 2 concepts.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 include/linux/mtd/nand.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 8cf5bdbea782..9cbb41a5541c 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -523,6 +523,16 @@ nanddev_get_memorg(struct nand_device *nand)
 	return &nand->memorg;
 }
 
+/**
+ * nanddev_get_ecc_conf() - Extract the ECC configuration from a NAND device
+ * @nand: NAND device
+ */
+static inline const struct nand_ecc_props *
+nanddev_get_ecc_conf(struct nand_device *nand)
+{
+	return &nand->eccreq;
+}
+
 int nanddev_init(struct nand_device *nand, const struct nand_ops *ops,
 		 struct module *owner);
 void nanddev_cleanup(struct nand_device *nand);
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 12/20] mtd: spinand: Use nanddev_get_ecc_conf() when relevant
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (10 preceding siblings ...)
  2020-08-27  8:51 ` [PATCH v13 11/20] mtd: nand: Create a helper to extract the ECC configuration Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:52 ` [PATCH v13 13/20] mtd: nand: Create helpers to set/extract the ECC requirements Miquel Raynal
                   ` (7 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Instead of accessing ->strength/step_size directly.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/spi/core.c     | 6 +++---
 drivers/mtd/nand/spi/macronix.c | 7 ++++---
 drivers/mtd/nand/spi/toshiba.c  | 6 +++---
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 6f6ec8aa143d..56019de28a90 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -419,7 +419,7 @@ static int spinand_check_ecc_status(struct spinand_device *spinand, u8 status)
 		 * fixed, so let's return the maximum possible value so that
 		 * wear-leveling layers move the data immediately.
 		 */
-		return nand->eccreq.strength;
+		return nanddev_get_ecc_conf(nand)->strength;
 
 	case STATUS_ECC_UNCOR_ERROR:
 		return -EBADMSG;
@@ -1091,8 +1091,8 @@ static int spinand_init(struct spinand_device *spinand)
 	mtd->oobavail = ret;
 
 	/* Propagate ECC information to mtd_info */
-	mtd->ecc_strength = nand->eccreq.strength;
-	mtd->ecc_step_size = nand->eccreq.step_size;
+	mtd->ecc_strength = nanddev_get_ecc_conf(nand)->strength;
+	mtd->ecc_step_size = nanddev_get_ecc_conf(nand)->step_size;
 
 	return 0;
 
diff --git a/drivers/mtd/nand/spi/macronix.c b/drivers/mtd/nand/spi/macronix.c
index 0f900f3aa21a..9ff8debd5994 100644
--- a/drivers/mtd/nand/spi/macronix.c
+++ b/drivers/mtd/nand/spi/macronix.c
@@ -84,10 +84,11 @@ static int mx35lf1ge4ab_ecc_get_status(struct spinand_device *spinand,
 		 * data around if it's not necessary.
 		 */
 		if (mx35lf1ge4ab_get_eccsr(spinand, &eccsr))
-			return nand->eccreq.strength;
+			return nanddev_get_ecc_conf(nand)->strength;
 
-		if (WARN_ON(eccsr > nand->eccreq.strength || !eccsr))
-			return nand->eccreq.strength;
+		if (WARN_ON(eccsr > nanddev_get_ecc_conf(nand)->strength ||
+			    !eccsr))
+			return nanddev_get_ecc_conf(nand)->strength;
 
 		return eccsr;
 
diff --git a/drivers/mtd/nand/spi/toshiba.c b/drivers/mtd/nand/spi/toshiba.c
index bc801d83343e..21fde2875674 100644
--- a/drivers/mtd/nand/spi/toshiba.c
+++ b/drivers/mtd/nand/spi/toshiba.c
@@ -90,12 +90,12 @@ static int tx58cxgxsxraix_ecc_get_status(struct spinand_device *spinand,
 		 * data around if it's not necessary.
 		 */
 		if (spi_mem_exec_op(spinand->spimem, &op))
-			return nand->eccreq.strength;
+			return nanddev_get_ecc_conf(nand)->strength;
 
 		mbf >>= 4;
 
-		if (WARN_ON(mbf > nand->eccreq.strength || !mbf))
-			return nand->eccreq.strength;
+		if (WARN_ON(mbf > nanddev_get_ecc_conf(nand)->strength || !mbf))
+			return nanddev_get_ecc_conf(nand)->strength;
 
 		return mbf;
 
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 13/20] mtd: nand: Create helpers to set/extract the ECC requirements
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (11 preceding siblings ...)
  2020-08-27  8:52 ` [PATCH v13 12/20] mtd: spinand: Use nanddev_get_ecc_conf() when relevant Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
  2020-08-27  8:52 ` [PATCH v13 14/20] mtd: rawnand: Use nanddev_get/set_ecc_requirements() when relevant Miquel Raynal
                   ` (6 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Despite its current name, the eccreq field actually encodes both the
NAND requirements and the final ECC configuration. That works fine when
using on-die ECC since those 2 concepts match perfectly, but it starts
being a problem as soon as we use on-host ECC engines, where we're not
guaranteed to have a perfect match.

Let's hide the ECC requirements access behind helpers so we can later
split those 2 concepts. As the structures have not been clarified yet,
these helpers access the same internal variable as
nanddev_get_ecc_conf() for now.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 include/linux/mtd/nand.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 9cbb41a5541c..348fb2ad4d90 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -533,6 +533,30 @@ nanddev_get_ecc_conf(struct nand_device *nand)
 	return &nand->eccreq;
 }
 
+/**
+ * nanddev_get_ecc_requirements() - Extract the ECC requirements from a NAND
+ *                                  device
+ * @nand: NAND device
+ */
+static inline const struct nand_ecc_props *
+nanddev_get_ecc_requirements(struct nand_device *nand)
+{
+	return &nand->eccreq;
+}
+
+/**
+ * nanddev_set_ecc_requirements() - Assign the ECC requirements of a NAND
+ *                                  device
+ * @nand: NAND device
+ * @reqs: Requirements
+ */
+static inline void
+nanddev_set_ecc_requirements(struct nand_device *nand,
+			     const struct nand_ecc_props *reqs)
+{
+	nand->eccreq = *reqs;
+}
+
 int nanddev_init(struct nand_device *nand, const struct nand_ops *ops,
 		 struct module *owner);
 void nanddev_cleanup(struct nand_device *nand);
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 14/20] mtd: rawnand: Use nanddev_get/set_ecc_requirements() when relevant
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (12 preceding siblings ...)
  2020-08-27  8:52 ` [PATCH v13 13/20] mtd: nand: Create helpers to set/extract the ECC requirements Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
  2020-08-27  8:52 ` [PATCH v13 15/20] mtd: nand: Use the new generic ECC object Miquel Raynal
                   ` (5 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Instead of accessing ->strength/step_size directly.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/raw/atmel/nand-controller.c | 10 +++--
 drivers/mtd/nand/raw/brcmnand/brcmnand.c     |  8 ++--
 drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c   | 13 +++---
 drivers/mtd/nand/raw/marvell_nand.c          |  8 ++--
 drivers/mtd/nand/raw/mtk_nand.c              |  6 ++-
 drivers/mtd/nand/raw/nand_base.c             | 27 +++++++-----
 drivers/mtd/nand/raw/nand_esmt.c             | 15 ++++---
 drivers/mtd/nand/raw/nand_hynix.c            | 44 +++++++++++---------
 drivers/mtd/nand/raw/nand_jedec.c            |  9 +++-
 drivers/mtd/nand/raw/nand_micron.c           | 17 +++++---
 drivers/mtd/nand/raw/nand_onfi.c             | 17 ++++++--
 drivers/mtd/nand/raw/nand_samsung.c          | 22 ++++++----
 drivers/mtd/nand/raw/nand_toshiba.c          | 14 ++++---
 drivers/mtd/nand/raw/sunxi_nand.c            |  6 ++-
 drivers/mtd/nand/raw/tegra_nand.c            | 12 ++++--
 drivers/mtd/nand/spi/core.c                  |  2 +-
 16 files changed, 144 insertions(+), 86 deletions(-)

diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index 0d9cd7faf00d..3d162fdc9ce2 100644
--- a/drivers/mtd/nand/raw/atmel/nand-controller.c
+++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
@@ -1043,6 +1043,8 @@ static int atmel_hsmc_nand_pmecc_read_page_raw(struct nand_chip *chip,
 
 static int atmel_nand_pmecc_init(struct nand_chip *chip)
 {
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct atmel_nand *nand = to_atmel_nand(chip);
 	struct atmel_nand_controller *nc;
@@ -1072,15 +1074,15 @@ static int atmel_nand_pmecc_init(struct nand_chip *chip)
 		req.ecc.strength = ATMEL_PMECC_MAXIMIZE_ECC_STRENGTH;
 	else if (chip->ecc.strength)
 		req.ecc.strength = chip->ecc.strength;
-	else if (chip->base.eccreq.strength)
-		req.ecc.strength = chip->base.eccreq.strength;
+	else if (requirements->strength)
+		req.ecc.strength = requirements->strength;
 	else
 		req.ecc.strength = ATMEL_PMECC_MAXIMIZE_ECC_STRENGTH;
 
 	if (chip->ecc.size)
 		req.ecc.sectorsize = chip->ecc.size;
-	else if (chip->base.eccreq.step_size)
-		req.ecc.sectorsize = chip->base.eccreq.step_size;
+	else if (requirements->step_size)
+		req.ecc.sectorsize = requirements->step_size;
 	else
 		req.ecc.sectorsize = ATMEL_PMECC_SECTOR_SIZE_AUTO;
 
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
index afe27a27cb93..2da39ab89286 100644
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -2532,6 +2532,8 @@ static int brcmnand_setup_dev(struct brcmnand_host *host)
 {
 	struct mtd_info *mtd = nand_to_mtd(&host->chip);
 	struct nand_chip *chip = &host->chip;
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	struct brcmnand_controller *ctrl = host->ctrl;
 	struct brcmnand_cfg *cfg = &host->hwcfg;
 	char msg[128];
@@ -2589,10 +2591,10 @@ static int brcmnand_setup_dev(struct brcmnand_host *host)
 
 	if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_NONE &&
 	    (!chip->ecc.size || !chip->ecc.strength)) {
-		if (chip->base.eccreq.step_size && chip->base.eccreq.strength) {
+		if (requirements->step_size && requirements->strength) {
 			/* use detected ECC parameters */
-			chip->ecc.size = chip->base.eccreq.step_size;
-			chip->ecc.strength = chip->base.eccreq.strength;
+			chip->ecc.size = requirements->step_size;
+			chip->ecc.strength = requirements->strength;
 			dev_info(ctrl->dev, "Using ECC step-size %d, strength %d\n",
 				chip->ecc.size, chip->ecc.strength);
 		}
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index 9b015d360a50..39903a13ef19 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -272,8 +272,8 @@ static int set_geometry_by_ecc_info(struct gpmi_nand_data *this,
 	default:
 		dev_err(this->dev,
 			"unsupported nand chip. ecc bits : %d, ecc size : %d\n",
-			chip->base.eccreq.strength,
-			chip->base.eccreq.step_size);
+			nanddev_get_ecc_requirements(&chip->base)->strength,
+			nanddev_get_ecc_requirements(&chip->base)->step_size);
 		return -EINVAL;
 	}
 	geo->ecc_chunk_size = ecc_step;
@@ -509,6 +509,8 @@ static int legacy_set_geometry(struct gpmi_nand_data *this)
 
 static int common_nfc_set_geometry(struct gpmi_nand_data *this)
 {
+	struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	struct nand_chip *chip = &this->nand;
 
 	if (chip->ecc.strength > 0 && chip->ecc.size > 0)
@@ -517,13 +519,12 @@ static int common_nfc_set_geometry(struct gpmi_nand_data *this)
 
 	if ((of_property_read_bool(this->dev->of_node, "fsl,use-minimum-ecc"))
 				|| legacy_set_geometry(this)) {
-		if (!(chip->base.eccreq.strength > 0 &&
-		      chip->base.eccreq.step_size > 0))
+		if (!(requirements->strength > 0 && requirements->step_size > 0))
 			return -EINVAL;
 
 		return set_geometry_by_ecc_info(this,
-						chip->base.eccreq.strength,
-						chip->base.eccreq.step_size);
+						requirements->strength,
+						requirements->step_size);
 	}
 
 	return 0;
diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c
index 88f8ed051226..f7ff8e93a249 100644
--- a/drivers/mtd/nand/raw/marvell_nand.c
+++ b/drivers/mtd/nand/raw/marvell_nand.c
@@ -2247,14 +2247,16 @@ static int marvell_nand_ecc_init(struct mtd_info *mtd,
 				 struct nand_ecc_ctrl *ecc)
 {
 	struct nand_chip *chip = mtd_to_nand(mtd);
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	struct marvell_nfc *nfc = to_marvell_nfc(chip->controller);
 	int ret;
 
 	if (ecc->engine_type != NAND_ECC_ENGINE_TYPE_NONE &&
 	    (!ecc->size || !ecc->strength)) {
-		if (chip->base.eccreq.step_size && chip->base.eccreq.strength) {
-			ecc->size = chip->base.eccreq.step_size;
-			ecc->strength = chip->base.eccreq.strength;
+		if (requirements->step_size && requirements->strength) {
+			ecc->size = requirements->step_size;
+			ecc->strength = requirements->strength;
 		} else {
 			dev_info(nfc->dev,
 				 "No minimum ECC strength, using 1b/512B\n");
diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c
index 42966fe22d8b..57f1f1708994 100644
--- a/drivers/mtd/nand/raw/mtk_nand.c
+++ b/drivers/mtd/nand/raw/mtk_nand.c
@@ -1253,6 +1253,8 @@ static int mtk_nfc_set_spare_per_sector(u32 *sps, struct mtd_info *mtd)
 static int mtk_nfc_ecc_init(struct device *dev, struct mtd_info *mtd)
 {
 	struct nand_chip *nand = mtd_to_nand(mtd);
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&nand->base);
 	struct mtk_nfc *nfc = nand_get_controller_data(nand);
 	u32 spare;
 	int free, ret;
@@ -1266,8 +1268,8 @@ static int mtk_nfc_ecc_init(struct device *dev, struct mtd_info *mtd)
 	/* if optional dt settings not present */
 	if (!nand->ecc.size || !nand->ecc.strength) {
 		/* use datasheet requirements */
-		nand->ecc.strength = nand->base.eccreq.strength;
-		nand->ecc.size = nand->base.eccreq.step_size;
+		nand->ecc.strength = requirements->strength;
+		nand->ecc.size = requirements->step_size;
 
 		/*
 		 * align eccstrength and eccsize
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 4256c2c28714..81caab7b9306 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4755,6 +4755,8 @@ static inline bool is_full_id_nand(struct nand_flash_dev *type)
 static bool find_full_id_nand(struct nand_chip *chip,
 			      struct nand_flash_dev *type)
 {
+	struct nand_device *base = &chip->base;
+	struct nand_ecc_props requirements;
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct nand_memory_organization *memorg;
 	u8 *id_data = chip->id.data;
@@ -4776,8 +4778,9 @@ static bool find_full_id_nand(struct nand_chip *chip,
 					   memorg->pagesize *
 					   memorg->pages_per_eraseblock);
 		chip->options |= type->options;
-		chip->base.eccreq.strength = NAND_ECC_STRENGTH(type);
-		chip->base.eccreq.step_size = NAND_ECC_STEP(type);
+		requirements.strength = NAND_ECC_STRENGTH(type);
+		requirements.step_size = NAND_ECC_STEP(type);
+		nanddev_set_ecc_requirements(base, &requirements);
 
 		chip->parameters.model = kstrdup(type->name, GFP_KERNEL);
 		if (!chip->parameters.model)
@@ -5477,10 +5480,12 @@ static int
 nand_match_ecc_req(struct nand_chip *chip,
 		   const struct nand_ecc_caps *caps, int oobavail)
 {
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	const struct nand_ecc_step_info *stepinfo;
-	int req_step = chip->base.eccreq.step_size;
-	int req_strength = chip->base.eccreq.strength;
+	int req_step = requirements->step_size;
+	int req_strength = requirements->strength;
 	int req_corr, step_size, strength, nsteps, ecc_bytes, ecc_bytes_total;
 	int best_step, best_strength, best_ecc_bytes;
 	int best_ecc_bytes_total = INT_MAX;
@@ -5671,9 +5676,11 @@ static bool nand_ecc_strength_good(struct nand_chip *chip)
 {
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct nand_ecc_ctrl *ecc = &chip->ecc;
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	int corr, ds_corr;
 
-	if (ecc->size == 0 || chip->base.eccreq.step_size == 0)
+	if (ecc->size == 0 || requirements->step_size == 0)
 		/* Not enough information */
 		return true;
 
@@ -5682,10 +5689,10 @@ static bool nand_ecc_strength_good(struct nand_chip *chip)
 	 * the correction density.
 	 */
 	corr = (mtd->writesize * ecc->strength) / ecc->size;
-	ds_corr = (mtd->writesize * chip->base.eccreq.strength) /
-		  chip->base.eccreq.step_size;
+	ds_corr = (mtd->writesize * requirements->strength) /
+		  requirements->step_size;
 
-	return corr >= ds_corr && ecc->strength >= chip->base.eccreq.strength;
+	return corr >= ds_corr && ecc->strength >= requirements->strength;
 }
 
 static int rawnand_erase(struct nand_device *nand, const struct nand_pos *pos)
@@ -5972,8 +5979,8 @@ static int nand_scan_tail(struct nand_chip *chip)
 	if (!nand_ecc_strength_good(chip))
 		pr_warn("WARNING: %s: the ECC used on your system (%db/%dB) is too weak compared to the one required by the NAND chip (%db/%dB)\n",
 			mtd->name, chip->ecc.strength, chip->ecc.size,
-			chip->base.eccreq.strength,
-			chip->base.eccreq.step_size);
+			nanddev_get_ecc_requirements(&chip->base)->strength,
+			nanddev_get_ecc_requirements(&chip->base)->step_size);
 
 	/* Allow subpage writes up to ecc.steps. Not possible for MLC flash */
 	if (!(chip->options & NAND_NO_SUBPAGE_WRITE) && nand_is_slc(chip)) {
diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c
index 3338c68aaaf1..4412c407aef3 100644
--- a/drivers/mtd/nand/raw/nand_esmt.c
+++ b/drivers/mtd/nand/raw/nand_esmt.c
@@ -10,27 +10,32 @@
 
 static void esmt_nand_decode_id(struct nand_chip *chip)
 {
+	struct nand_device *base = &chip->base;
+	struct nand_ecc_props requirements = {};
+
 	nand_decode_ext_id(chip);
 
 	/* Extract ECC requirements from 5th id byte. */
 	if (chip->id.len >= 5 && nand_is_slc(chip)) {
-		chip->base.eccreq.step_size = 512;
+		requirements.step_size = 512;
 		switch (chip->id.data[4] & 0x3) {
 		case 0x0:
-			chip->base.eccreq.strength = 4;
+			requirements.strength = 4;
 			break;
 		case 0x1:
-			chip->base.eccreq.strength = 2;
+			requirements.strength = 2;
 			break;
 		case 0x2:
-			chip->base.eccreq.strength = 1;
+			requirements.strength = 1;
 			break;
 		default:
 			WARN(1, "Could not get ECC info");
-			chip->base.eccreq.step_size = 0;
+			requirements.step_size = 0;
 			break;
 		}
 	}
+
+	nanddev_set_ecc_requirements(base, &requirements);
 }
 
 static int esmt_nand_init(struct nand_chip *chip)
diff --git a/drivers/mtd/nand/raw/nand_hynix.c b/drivers/mtd/nand/raw/nand_hynix.c
index 6d08eb834456..a9f50c9af109 100644
--- a/drivers/mtd/nand/raw/nand_hynix.c
+++ b/drivers/mtd/nand/raw/nand_hynix.c
@@ -495,34 +495,36 @@ static void hynix_nand_extract_oobsize(struct nand_chip *chip,
 static void hynix_nand_extract_ecc_requirements(struct nand_chip *chip,
 						bool valid_jedecid)
 {
+	struct nand_device *base = &chip->base;
+	struct nand_ecc_props requirements = {};
 	u8 ecc_level = (chip->id.data[4] >> 4) & 0x7;
 
 	if (valid_jedecid) {
 		/* Reference: H27UCG8T2E datasheet */
-		chip->base.eccreq.step_size = 1024;
+		requirements.step_size = 1024;
 
 		switch (ecc_level) {
 		case 0:
-			chip->base.eccreq.step_size = 0;
-			chip->base.eccreq.strength = 0;
+			requirements.step_size = 0;
+			requirements.strength = 0;
 			break;
 		case 1:
-			chip->base.eccreq.strength = 4;
+			requirements.strength = 4;
 			break;
 		case 2:
-			chip->base.eccreq.strength = 24;
+			requirements.strength = 24;
 			break;
 		case 3:
-			chip->base.eccreq.strength = 32;
+			requirements.strength = 32;
 			break;
 		case 4:
-			chip->base.eccreq.strength = 40;
+			requirements.strength = 40;
 			break;
 		case 5:
-			chip->base.eccreq.strength = 50;
+			requirements.strength = 50;
 			break;
 		case 6:
-			chip->base.eccreq.strength = 60;
+			requirements.strength = 60;
 			break;
 		default:
 			/*
@@ -543,14 +545,14 @@ static void hynix_nand_extract_ecc_requirements(struct nand_chip *chip,
 		if (nand_tech < 3) {
 			/* > 26nm, reference: H27UBG8T2A datasheet */
 			if (ecc_level < 5) {
-				chip->base.eccreq.step_size = 512;
-				chip->base.eccreq.strength = 1 << ecc_level;
+				requirements.step_size = 512;
+				requirements.strength = 1 << ecc_level;
 			} else if (ecc_level < 7) {
 				if (ecc_level == 5)
-					chip->base.eccreq.step_size = 2048;
+					requirements.step_size = 2048;
 				else
-					chip->base.eccreq.step_size = 1024;
-				chip->base.eccreq.strength = 24;
+					requirements.step_size = 1024;
+				requirements.strength = 24;
 			} else {
 				/*
 				 * We should never reach this case, but if that
@@ -563,18 +565,20 @@ static void hynix_nand_extract_ecc_requirements(struct nand_chip *chip,
 		} else {
 			/* <= 26nm, reference: H27UBG8T2B datasheet */
 			if (!ecc_level) {
-				chip->base.eccreq.step_size = 0;
-				chip->base.eccreq.strength = 0;
+				requirements.step_size = 0;
+				requirements.strength = 0;
 			} else if (ecc_level < 5) {
-				chip->base.eccreq.step_size = 512;
-				chip->base.eccreq.strength = 1 << (ecc_level - 1);
+				requirements.step_size = 512;
+				requirements.strength = 1 << (ecc_level - 1);
 			} else {
-				chip->base.eccreq.step_size = 1024;
-				chip->base.eccreq.strength = 24 +
+				requirements.step_size = 1024;
+				requirements.strength = 24 +
 							(8 * (ecc_level - 5));
 			}
 		}
 	}
+
+	nanddev_set_ecc_requirements(base, &requirements);
 }
 
 static void hynix_nand_extract_scrambling_requirements(struct nand_chip *chip,
diff --git a/drivers/mtd/nand/raw/nand_jedec.c b/drivers/mtd/nand/raw/nand_jedec.c
index b15c42f48755..85b6d9372d80 100644
--- a/drivers/mtd/nand/raw/nand_jedec.c
+++ b/drivers/mtd/nand/raw/nand_jedec.c
@@ -23,6 +23,7 @@
  */
 int nand_jedec_detect(struct nand_chip *chip)
 {
+	struct nand_device *base = &chip->base;
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct nand_memory_organization *memorg;
 	struct nand_jedec_params *p;
@@ -120,8 +121,12 @@ int nand_jedec_detect(struct nand_chip *chip)
 	ecc = &p->ecc_info[0];
 
 	if (ecc->codeword_size >= 9) {
-		chip->base.eccreq.strength = ecc->ecc_bits;
-		chip->base.eccreq.step_size = 1 << ecc->codeword_size;
+		struct nand_ecc_props requirements = {
+			.strength = ecc->ecc_bits,
+			.step_size = 1 << ecc->codeword_size,
+		};
+
+		nanddev_set_ecc_requirements(base, &requirements);
 	} else {
 		pr_warn("Invalid codeword size\n");
 	}
diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
index c43afaf21482..c0192881906b 100644
--- a/drivers/mtd/nand/raw/nand_micron.c
+++ b/drivers/mtd/nand/raw/nand_micron.c
@@ -413,6 +413,8 @@ enum {
  */
 static int micron_supports_on_die_ecc(struct nand_chip *chip)
 {
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	u8 id[5];
 	int ret;
 
@@ -425,7 +427,7 @@ static int micron_supports_on_die_ecc(struct nand_chip *chip)
 	/*
 	 * We only support on-die ECC of 4/512 or 8/512
 	 */
-	if  (chip->base.eccreq.strength != 4 && chip->base.eccreq.strength != 8)
+	if  (requirements->strength != 4 && requirements->strength != 8)
 		return MICRON_ON_DIE_UNSUPPORTED;
 
 	/* 0x2 means on-die ECC is available. */
@@ -466,7 +468,7 @@ static int micron_supports_on_die_ecc(struct nand_chip *chip)
 	/*
 	 * We only support on-die ECC of 4/512 or 8/512
 	 */
-	if  (chip->base.eccreq.strength != 4 && chip->base.eccreq.strength != 8)
+	if  (requirements->strength != 4 && requirements->strength != 8)
 		return MICRON_ON_DIE_UNSUPPORTED;
 
 	return MICRON_ON_DIE_SUPPORTED;
@@ -474,6 +476,9 @@ static int micron_supports_on_die_ecc(struct nand_chip *chip)
 
 static int micron_nand_init(struct nand_chip *chip)
 {
+	struct nand_device *base = &chip->base;
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(base);
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct micron_nand *micron;
 	int ondie;
@@ -523,7 +528,7 @@ static int micron_nand_init(struct nand_chip *chip)
 		 * That's not needed for 8-bit ECC, because the status expose
 		 * a better approximation of the number of bitflips in a page.
 		 */
-		if (chip->base.eccreq.strength == 4) {
+		if (requirements->strength == 4) {
 			micron->ecc.rawbuf = kmalloc(mtd->writesize +
 						     mtd->oobsize,
 						     GFP_KERNEL);
@@ -533,16 +538,16 @@ static int micron_nand_init(struct nand_chip *chip)
 			}
 		}
 
-		if (chip->base.eccreq.strength == 4)
+		if (requirements->strength == 4)
 			mtd_set_ooblayout(mtd,
 					  &micron_nand_on_die_4_ooblayout_ops);
 		else
 			mtd_set_ooblayout(mtd,
 					  &micron_nand_on_die_8_ooblayout_ops);
 
-		chip->ecc.bytes = chip->base.eccreq.strength * 2;
+		chip->ecc.bytes = requirements->strength * 2;
 		chip->ecc.size = 512;
-		chip->ecc.strength = chip->base.eccreq.strength;
+		chip->ecc.strength = requirements->strength;
 		chip->ecc.algo = NAND_ECC_ALGO_BCH;
 		chip->ecc.read_page = micron_nand_read_page_on_die_ecc;
 		chip->ecc.write_page = micron_nand_write_page_on_die_ecc;
diff --git a/drivers/mtd/nand/raw/nand_onfi.c b/drivers/mtd/nand/raw/nand_onfi.c
index be3456627288..45649e03797d 100644
--- a/drivers/mtd/nand/raw/nand_onfi.c
+++ b/drivers/mtd/nand/raw/nand_onfi.c
@@ -34,6 +34,8 @@ u16 onfi_crc16(u16 crc, u8 const *p, size_t len)
 static int nand_flash_detect_ext_param_page(struct nand_chip *chip,
 					    struct nand_onfi_params *p)
 {
+	struct nand_device *base = &chip->base;
+	struct nand_ecc_props requirements;
 	struct onfi_ext_param_page *ep;
 	struct onfi_ext_section *s;
 	struct onfi_ext_ecc_info *ecc;
@@ -94,8 +96,10 @@ static int nand_flash_detect_ext_param_page(struct nand_chip *chip,
 		goto ext_out;
 	}
 
-	chip->base.eccreq.strength = ecc->ecc_bits;
-	chip->base.eccreq.step_size = 1 << ecc->codeword_size;
+	requirements.strength = ecc->ecc_bits;
+	requirements.step_size = 1 << ecc->codeword_size;
+	nanddev_set_ecc_requirements(base, &requirements);
+
 	ret = 0;
 
 ext_out:
@@ -139,6 +143,7 @@ static void nand_bit_wise_majority(const void **srcbufs,
  */
 int nand_onfi_detect(struct nand_chip *chip)
 {
+	struct nand_device *base = &chip->base;
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct nand_memory_organization *memorg;
 	struct nand_onfi_params *p = NULL, *pbuf;
@@ -265,8 +270,12 @@ int nand_onfi_detect(struct nand_chip *chip)
 		chip->options |= NAND_BUSWIDTH_16;
 
 	if (p->ecc_bits != 0xff) {
-		chip->base.eccreq.strength = p->ecc_bits;
-		chip->base.eccreq.step_size = 512;
+		struct nand_ecc_props requirements = {
+			.strength = p->ecc_bits,
+			.step_size = 512,
+		};
+
+		nanddev_set_ecc_requirements(base, &requirements);
 	} else if (onfi_version >= 21 &&
 		(le16_to_cpu(p->features) & ONFI_FEATURE_EXT_PARAM_PAGE)) {
 
diff --git a/drivers/mtd/nand/raw/nand_samsung.c b/drivers/mtd/nand/raw/nand_samsung.c
index 3a4a19e808f6..0be6b7563805 100644
--- a/drivers/mtd/nand/raw/nand_samsung.c
+++ b/drivers/mtd/nand/raw/nand_samsung.c
@@ -10,6 +10,8 @@
 
 static void samsung_nand_decode_id(struct nand_chip *chip)
 {
+	struct nand_device *base = &chip->base;
+	struct nand_ecc_props requirements = {};
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct nand_memory_organization *memorg;
 
@@ -71,23 +73,23 @@ static void samsung_nand_decode_id(struct nand_chip *chip)
 		/* Extract ECC requirements from 5th id byte*/
 		extid = (chip->id.data[4] >> 4) & 0x07;
 		if (extid < 5) {
-			chip->base.eccreq.step_size = 512;
-			chip->base.eccreq.strength = 1 << extid;
+			requirements.step_size = 512;
+			requirements.strength = 1 << extid;
 		} else {
-			chip->base.eccreq.step_size = 1024;
+			requirements.step_size = 1024;
 			switch (extid) {
 			case 5:
-				chip->base.eccreq.strength = 24;
+				requirements.strength = 24;
 				break;
 			case 6:
-				chip->base.eccreq.strength = 40;
+				requirements.strength = 40;
 				break;
 			case 7:
-				chip->base.eccreq.strength = 60;
+				requirements.strength = 60;
 				break;
 			default:
 				WARN(1, "Could not decode ECC info");
-				chip->base.eccreq.step_size = 0;
+				requirements.step_size = 0;
 			}
 		}
 	} else {
@@ -97,8 +99,8 @@ static void samsung_nand_decode_id(struct nand_chip *chip)
 			switch (chip->id.data[1]) {
 			/* K9F4G08U0D-S[I|C]B0(T00) */
 			case 0xDC:
-				chip->base.eccreq.step_size = 512;
-				chip->base.eccreq.strength = 1;
+				requirements.step_size = 512;
+				requirements.strength = 1;
 				break;
 
 			/* K9F1G08U0E 21nm chips do not support subpage write */
@@ -112,6 +114,8 @@ static void samsung_nand_decode_id(struct nand_chip *chip)
 			}
 		}
 	}
+
+	nanddev_set_ecc_requirements(base, &requirements);
 }
 
 static int samsung_nand_init(struct nand_chip *chip)
diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
index 7ba0516c6247..fb6662337b90 100644
--- a/drivers/mtd/nand/raw/nand_toshiba.c
+++ b/drivers/mtd/nand/raw/nand_toshiba.c
@@ -145,6 +145,8 @@ static void toshiba_nand_benand_init(struct nand_chip *chip)
 
 static void toshiba_nand_decode_id(struct nand_chip *chip)
 {
+	struct nand_device *base = &chip->base;
+	struct nand_ecc_props requirements = {};
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	struct nand_memory_organization *memorg;
 
@@ -175,23 +177,25 @@ static void toshiba_nand_decode_id(struct nand_chip *chip)
 	 *  - 24nm: 8 bit ECC for each 512Byte is required.
 	 */
 	if (chip->id.len >= 6 && nand_is_slc(chip)) {
-		chip->base.eccreq.step_size = 512;
+		requirements.step_size = 512;
 		switch (chip->id.data[5] & 0x7) {
 		case 0x4:
-			chip->base.eccreq.strength = 1;
+			requirements.strength = 1;
 			break;
 		case 0x5:
-			chip->base.eccreq.strength = 4;
+			requirements.strength = 4;
 			break;
 		case 0x6:
-			chip->base.eccreq.strength = 8;
+			requirements.strength = 8;
 			break;
 		default:
 			WARN(1, "Could not get ECC info");
-			chip->base.eccreq.step_size = 0;
+			requirements.step_size = 0;
 			break;
 		}
 	}
+
+	nanddev_set_ecc_requirements(base, &requirements);
 }
 
 static int
diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index c78276de7c37..b7b764ef4b1d 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1732,6 +1732,8 @@ static void sunxi_nand_ecc_cleanup(struct nand_ecc_ctrl *ecc)
 
 static int sunxi_nand_attach_chip(struct nand_chip *nand)
 {
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&nand->base);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	struct device_node *np = nand_get_flash_node(nand);
 	int ret;
@@ -1745,8 +1747,8 @@ static int sunxi_nand_attach_chip(struct nand_chip *nand)
 	nand->options |= NAND_SUBPAGE_READ;
 
 	if (!ecc->size) {
-		ecc->size = nand->base.eccreq.step_size;
-		ecc->strength = nand->base.eccreq.strength;
+		ecc->size = requirements->step_size;
+		ecc->strength = requirements->strength;
 	}
 
 	if (!ecc->size || !ecc->strength)
diff --git a/drivers/mtd/nand/raw/tegra_nand.c b/drivers/mtd/nand/raw/tegra_nand.c
index cc72a2de8891..100c18ef8fe8 100644
--- a/drivers/mtd/nand/raw/tegra_nand.c
+++ b/drivers/mtd/nand/raw/tegra_nand.c
@@ -840,6 +840,8 @@ static int tegra_nand_get_strength(struct nand_chip *chip, const int *strength,
 				   int strength_len, int bits_per_step,
 				   int oobsize)
 {
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	bool maximize = chip->ecc.options & NAND_ECC_MAXIMIZE;
 	int i;
 
@@ -855,7 +857,7 @@ static int tegra_nand_get_strength(struct nand_chip *chip, const int *strength,
 		} else {
 			strength_sel = strength[i];
 
-			if (strength_sel < chip->base.eccreq.strength)
+			if (strength_sel < requirements->strength)
 				continue;
 		}
 
@@ -908,6 +910,8 @@ static int tegra_nand_select_strength(struct nand_chip *chip, int oobsize)
 static int tegra_nand_attach_chip(struct nand_chip *chip)
 {
 	struct tegra_nand_controller *ctrl = to_tegra_ctrl(chip->controller);
+	const struct nand_ecc_props *requirements =
+		nanddev_get_ecc_requirements(&chip->base);
 	struct tegra_nand_chip *nand = to_tegra_chip(chip);
 	struct mtd_info *mtd = nand_to_mtd(chip);
 	int bits_per_step;
@@ -919,9 +923,9 @@ static int tegra_nand_attach_chip(struct nand_chip *chip)
 	chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
 	chip->ecc.size = 512;
 	chip->ecc.steps = mtd->writesize / chip->ecc.size;
-	if (chip->base.eccreq.step_size != 512) {
+	if (requirements->step_size != 512) {
 		dev_err(ctrl->dev, "Unsupported step size %d\n",
-			chip->base.eccreq.step_size);
+			requirements->step_size);
 		return -EINVAL;
 	}
 
@@ -952,7 +956,7 @@ static int tegra_nand_attach_chip(struct nand_chip *chip)
 		if (ret < 0) {
 			dev_err(ctrl->dev,
 				"No valid strength found, minimum %d\n",
-				chip->base.eccreq.strength);
+				requirements->strength);
 			return ret;
 		}
 
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 56019de28a90..0939e0f9c6a4 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -903,7 +903,7 @@ int spinand_match_and_init(struct spinand_device *spinand,
 			continue;
 
 		nand->memorg = table[i].memorg;
-		nand->eccreq = table[i].eccreq;
+		nanddev_set_ecc_requirements(nand, &table[i].eccreq);
 		spinand->eccinfo = table[i].eccinfo;
 		spinand->flags = table[i].flags;
 		spinand->id.len = 1 + table[i].devid.len;
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 15/20] mtd: nand: Use the new generic ECC object
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (13 preceding siblings ...)
  2020-08-27  8:52 ` [PATCH v13 14/20] mtd: rawnand: Use nanddev_get/set_ecc_requirements() when relevant Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
  2020-08-27  8:52 ` [PATCH v13 16/20] mtd: rawnand: Make use of the ECC framework Miquel Raynal
                   ` (4 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Embed a generic NAND ECC high-level object in the nand_device
structure to carry all the ECC engine configuration/data.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 include/linux/mtd/nand.h | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 348fb2ad4d90..697ea2474a7c 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -301,7 +301,7 @@ struct nand_ecc {
  * struct nand_device - NAND device
  * @mtd: MTD instance attached to the NAND device
  * @memorg: memory layout
- * @eccreq: ECC requirements
+ * @ecc: NAND ECC object attached to the NAND device
  * @rowconv: position to row address converter
  * @bbt: bad block table info
  * @ops: NAND operations attached to the NAND device
@@ -309,8 +309,8 @@ struct nand_ecc {
  * Generic NAND object. Specialized NAND layers (raw NAND, SPI NAND, OneNAND)
  * should declare their own NAND object embedding a nand_device struct (that's
  * how inheritance is done).
- * struct_nand_device->memorg and struct_nand_device->eccreq should be filled
- * at device detection time to reflect the NAND device
+ * struct_nand_device->memorg and struct_nand_device->ecc.requirements should
+ * be filled at device detection time to reflect the NAND device
  * capabilities/requirements. Once this is done nanddev_init() can be called.
  * It will take care of converting NAND information into MTD ones, which means
  * the specialized NAND layers should never manually tweak
@@ -319,7 +319,7 @@ struct nand_ecc {
 struct nand_device {
 	struct mtd_info mtd;
 	struct nand_memory_organization memorg;
-	struct nand_ecc_props eccreq;
+	struct nand_ecc ecc;
 	struct nand_row_converter rowconv;
 	struct nand_bbt bbt;
 	const struct nand_ops *ops;
@@ -530,7 +530,7 @@ nanddev_get_memorg(struct nand_device *nand)
 static inline const struct nand_ecc_props *
 nanddev_get_ecc_conf(struct nand_device *nand)
 {
-	return &nand->eccreq;
+	return &nand->ecc.ctx.conf;
 }
 
 /**
@@ -541,7 +541,7 @@ nanddev_get_ecc_conf(struct nand_device *nand)
 static inline const struct nand_ecc_props *
 nanddev_get_ecc_requirements(struct nand_device *nand)
 {
-	return &nand->eccreq;
+	return &nand->ecc.requirements;
 }
 
 /**
@@ -554,7 +554,7 @@ static inline void
 nanddev_set_ecc_requirements(struct nand_device *nand,
 			     const struct nand_ecc_props *reqs)
 {
-	nand->eccreq = *reqs;
+	nand->ecc.requirements = *reqs;
 }
 
 int nanddev_init(struct nand_device *nand, const struct nand_ops *ops,
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 16/20] mtd: rawnand: Make use of the ECC framework
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (14 preceding siblings ...)
  2020-08-27  8:52 ` [PATCH v13 15/20] mtd: nand: Use the new generic ECC object Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
  2020-08-27  8:52 ` [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts Miquel Raynal
                   ` (3 subsequent siblings)
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Just enable the ECC framework with raw NAND so that we can drop, one
by one, all the unnecessary/redundant definitions.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/raw/Kconfig     | 1 +
 drivers/mtd/nand/raw/nand_base.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 1203775023ad..6c46f25b57e2 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 81caab7b9306..b4ea831ecd85 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>
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (15 preceding siblings ...)
  2020-08-27  8:52 ` [PATCH v13 16/20] mtd: rawnand: Make use of the ECC framework Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
  2020-09-20 12:21   ` Janusz Krzysztofik
  2020-08-27  8:52 ` [PATCH v13 18/20] mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper Miquel Raynal
                   ` (2 subsequent siblings)
  19 siblings, 2 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

No need to have our own in the raw NAND core.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/raw/arasan-nand-controller.c |   2 +-
 drivers/mtd/nand/raw/atmel/nand-controller.c  |   2 +-
 drivers/mtd/nand/raw/davinci_nand.c           |   3 +-
 .../mtd/nand/raw/ingenic/ingenic_nand_drv.c   |   6 +-
 drivers/mtd/nand/raw/nand_base.c              | 171 +-----------------
 drivers/mtd/nand/raw/nand_toshiba.c           |   2 +-
 drivers/mtd/nand/raw/vf610_nfc.c              |   2 +-
 include/linux/mtd/rawnand.h                   |   4 +-
 8 files changed, 16 insertions(+), 176 deletions(-)

diff --git a/drivers/mtd/nand/raw/arasan-nand-controller.c b/drivers/mtd/nand/raw/arasan-nand-controller.c
index 006bc3d3ce20..fbb4ea751be8 100644
--- a/drivers/mtd/nand/raw/arasan-nand-controller.c
+++ b/drivers/mtd/nand/raw/arasan-nand-controller.c
@@ -980,7 +980,7 @@ static int anfc_init_hw_ecc_controller(struct arasan_nfc *nfc,
 		return -EINVAL;
 	}
 
-	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
+	mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
 
 	ecc->steps = mtd->writesize / ecc->size;
 	ecc->algo = NAND_ECC_ALGO_BCH;
diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index 3d162fdc9ce2..7fcc5e67163e 100644
--- a/drivers/mtd/nand/raw/atmel/nand-controller.c
+++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
@@ -1108,7 +1108,7 @@ static int atmel_nand_pmecc_init(struct nand_chip *chip)
 
 	chip->options |= NAND_NO_SUBPAGE_WRITE;
 
-	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
+	mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
 
 	return 0;
 }
diff --git a/drivers/mtd/nand/raw/davinci_nand.c b/drivers/mtd/nand/raw/davinci_nand.c
index 58966a9706b1..427f320fb79b 100644
--- a/drivers/mtd/nand/raw/davinci_nand.c
+++ b/drivers/mtd/nand/raw/davinci_nand.c
@@ -645,7 +645,8 @@ static int davinci_nand_attach_chip(struct nand_chip *chip)
 				mtd_set_ooblayout(mtd,
 						  &hwecc4_small_ooblayout_ops);
 			} else if (chunks == 4 || chunks == 8) {
-				mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
+				mtd_set_ooblayout(mtd,
+						  nand_get_large_page_ooblayout());
 				info->chip.ecc.read_page = nand_davinci_read_page_hwecc_oob_first;
 			} else {
 				return -EIO;
diff --git a/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c b/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
index 70309f18124c..0e9d426fe4f2 100644
--- a/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
+++ b/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
@@ -243,8 +243,10 @@ static int ingenic_nand_attach_chip(struct nand_chip *chip)
 	/* For legacy reasons we use a different layout on the qi,lb60 board. */
 	if (of_machine_is_compatible("qi,lb60"))
 		mtd_set_ooblayout(mtd, &qi_lb60_ooblayout_ops);
-	else
+	else if (nfc->soc_info->oob_layout)
 		mtd_set_ooblayout(mtd, nfc->soc_info->oob_layout);
+	else
+		mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
 
 	return 0;
 }
@@ -532,7 +534,6 @@ static const struct jz_soc_info jz4740_soc_info = {
 	.data_offset = 0x00000000,
 	.cmd_offset = 0x00008000,
 	.addr_offset = 0x00010000,
-	.oob_layout = &nand_ooblayout_lp_ops,
 };
 
 static const struct jz_soc_info jz4725b_soc_info = {
@@ -546,7 +547,6 @@ static const struct jz_soc_info jz4780_soc_info = {
 	.data_offset = 0x00000000,
 	.cmd_offset = 0x00400000,
 	.addr_offset = 0x00800000,
-	.oob_layout = &nand_ooblayout_lp_ops,
 };
 
 static const struct of_device_id ingenic_nand_dt_match[] = {
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index b4ea831ecd85..77f60849dfb4 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -46,166 +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 nand_pairing_dist3_get_info(struct mtd_info *mtd, int page,
 				       struct mtd_pairing_info *info)
 {
@@ -5377,7 +5217,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 				return -EINVAL;
 			}
 
-			mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
+			mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
 
 		}
 
@@ -5386,7 +5226,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 		 * used, otherwise we don't know how many bytes can really be
 		 * used.
 		 */
-		if (mtd->ooblayout == &nand_ooblayout_lp_ops &&
+		if (mtd->ooblayout == nand_get_large_page_ooblayout() &&
 		    ecc->options & NAND_ECC_MAXIMIZE) {
 			int steps, bytes;
 
@@ -5788,11 +5628,12 @@ static int nand_scan_tail(struct nand_chip *chip)
 		switch (mtd->oobsize) {
 		case 8:
 		case 16:
-			mtd_set_ooblayout(mtd, &nand_ooblayout_sp_ops);
+			mtd_set_ooblayout(mtd, nand_get_small_page_ooblayout());
 			break;
 		case 64:
 		case 128:
-			mtd_set_ooblayout(mtd, &nand_ooblayout_lp_hamming_ops);
+			mtd_set_ooblayout(mtd,
+					  nand_get_large_page_hamming_ooblayout());
 			break;
 		default:
 			/*
@@ -5804,7 +5645,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 			 */
 			if (ecc->engine_type == NAND_ECC_ENGINE_TYPE_NONE) {
 				mtd_set_ooblayout(mtd,
-						&nand_ooblayout_lp_ops);
+						  nand_get_large_page_ooblayout());
 				break;
 			}
 
diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
index fb6662337b90..cf4f37959421 100644
--- a/drivers/mtd/nand/raw/nand_toshiba.c
+++ b/drivers/mtd/nand/raw/nand_toshiba.c
@@ -140,7 +140,7 @@ static void toshiba_nand_benand_init(struct nand_chip *chip)
 
 	chip->options |= NAND_SUBPAGE_READ;
 
-	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
+	mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
 }
 
 static void toshiba_nand_decode_id(struct nand_chip *chip)
diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/vf610_nfc.c
index 8ee2c1f539c4..50dc0c93140c 100644
--- a/drivers/mtd/nand/raw/vf610_nfc.c
+++ b/drivers/mtd/nand/raw/vf610_nfc.c
@@ -779,7 +779,7 @@ static int vf610_nfc_attach_chip(struct nand_chip *chip)
 		mtd->oobsize = 64;
 
 	/* Use default large page ECC layout defined in NAND core */
-	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
+	mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
 	if (chip->ecc.strength == 32) {
 		nfc->ecc_mode = ECC_60_BYTE;
 		chip->ecc.bytes = 60;
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 967b616c50df..1bbce6fa1b08 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -14,6 +14,7 @@
 #define __LINUX_MTD_RAWNAND_H
 
 #include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
 #include <linux/mtd/flashchip.h>
 #include <linux/mtd/bbm.h>
 #include <linux/mtd/jedec.h>
@@ -1156,9 +1157,6 @@ struct nand_chip {
 	void *priv;
 };
 
-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


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 18/20] mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (16 preceding siblings ...)
  2020-08-27  8:52 ` [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
  2020-08-27  8:52 ` [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits Miquel Raynal
  2020-08-27  8:52 ` [PATCH v13 20/20] mtd: rawnand: Use the NAND framework user_conf object for ECC flags Miquel Raynal
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Plus, the new helper has a more "english" name.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/raw/nand_base.c | 39 +-------------------------------
 1 file changed, 1 insertion(+), 38 deletions(-)

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 77f60849dfb4..66443986d80f 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5499,43 +5499,6 @@ int nand_ecc_choose_conf(struct nand_chip *chip,
 }
 EXPORT_SYMBOL_GPL(nand_ecc_choose_conf);
 
-/*
- * Check if the chip configuration meet the datasheet requirements.
-
- * If our configuration corrects A bits per B bytes and the minimum
- * required correction level is X bits per Y bytes, then we must ensure
- * both of the following are true:
- *
- * (1) A / B >= X / Y
- * (2) A >= X
- *
- * Requirement (1) ensures we can correct for the required bitflip density.
- * Requirement (2) ensures we can correct even when all bitflips are clumped
- * in the same sector.
- */
-static bool nand_ecc_strength_good(struct nand_chip *chip)
-{
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
-	const struct nand_ecc_props *requirements =
-		nanddev_get_ecc_requirements(&chip->base);
-	int corr, ds_corr;
-
-	if (ecc->size == 0 || requirements->step_size == 0)
-		/* Not enough information */
-		return true;
-
-	/*
-	 * We get the number of corrected bits per page to compare
-	 * the correction density.
-	 */
-	corr = (mtd->writesize * ecc->strength) / ecc->size;
-	ds_corr = (mtd->writesize * requirements->strength) /
-		  requirements->step_size;
-
-	return corr >= ds_corr && ecc->strength >= requirements->strength;
-}
-
 static int rawnand_erase(struct nand_device *nand, const struct nand_pos *pos)
 {
 	struct nand_chip *chip = container_of(nand, struct nand_chip,
@@ -5818,7 +5781,7 @@ static int nand_scan_tail(struct nand_chip *chip)
 	mtd->oobavail = ret;
 
 	/* ECC sanity check: warn if it's too weak */
-	if (!nand_ecc_strength_good(chip))
+	if (!nand_ecc_is_strong_enough(&chip->base))
 		pr_warn("WARNING: %s: the ECC used on your system (%db/%dB) is too weak compared to the one required by the NAND chip (%db/%dB)\n",
 			mtd->name, chip->ecc.strength, chip->ecc.size,
 			nanddev_get_ecc_requirements(&chip->base)->strength,
-- 
2.20.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (17 preceding siblings ...)
  2020-08-27  8:52 ` [PATCH v13 18/20] mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
  2020-09-21  9:36   ` Sascha Hauer
  2020-08-27  8:52 ` [PATCH v13 20/20] mtd: rawnand: Use the NAND framework user_conf object for ECC flags Miquel Raynal
  19 siblings, 2 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Many helpers are generic to all NAND chips, they should not be
raw-NAND specific, so use the generic ones.

To avoid moving all the raw NAND core "history" into the generic NAND
layer, we keep a part of this parsing in the raw NAND core to ensure
backward compatibility.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/raw/nand_base.c | 144 +++++++++++++++----------------
 include/linux/mtd/rawnand.h      |  12 ---
 2 files changed, 71 insertions(+), 85 deletions(-)

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 66443986d80f..6a5f5699514f 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4882,18 +4882,27 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type)
 	return ret;
 }
 
-static const char * const nand_ecc_modes[] = {
-	[NAND_ECC_NONE]		= "none",
-	[NAND_ECC_SOFT]		= "soft",
-	[NAND_ECC_HW]		= "hw",
-	[NAND_ECC_HW_SYNDROME]	= "hw_syndrome",
-	[NAND_ECC_ON_DIE]	= "on-die",
-};
-
 static enum nand_ecc_engine_type
-of_get_nand_ecc_engine_type(struct device_node *np)
+of_get_rawnand_ecc_engine_type_legacy(struct device_node *np)
 {
-	enum nand_ecc_mode eng_type;
+	enum nand_ecc_legacy_mode {
+		NAND_ECC_INVALID,
+		NAND_ECC_NONE,
+		NAND_ECC_SOFT,
+		NAND_ECC_SOFT_BCH,
+		NAND_ECC_HW,
+		NAND_ECC_HW_SYNDROME,
+		NAND_ECC_ON_DIE,
+	};
+	const char * const nand_ecc_legacy_modes[] = {
+		[NAND_ECC_NONE]		= "none",
+		[NAND_ECC_SOFT]		= "soft",
+		[NAND_ECC_SOFT_BCH]	= "soft_bch",
+		[NAND_ECC_HW]		= "hw",
+		[NAND_ECC_HW_SYNDROME]	= "hw_syndrome",
+		[NAND_ECC_ON_DIE]	= "on-die",
+	};
+	enum nand_ecc_legacy_mode eng_type;
 	const char *pm;
 	int err;
 
@@ -4902,12 +4911,13 @@ of_get_nand_ecc_engine_type(struct device_node *np)
 		return NAND_ECC_ENGINE_TYPE_INVALID;
 
 	for (eng_type = NAND_ECC_NONE;
-	     eng_type < ARRAY_SIZE(nand_ecc_modes); eng_type++) {
-		if (!strcasecmp(pm, nand_ecc_modes[eng_type])) {
+	     eng_type < ARRAY_SIZE(nand_ecc_legacy_modes); eng_type++) {
+		if (!strcasecmp(pm, nand_ecc_legacy_modes[eng_type])) {
 			switch (eng_type) {
 			case NAND_ECC_NONE:
 				return NAND_ECC_ENGINE_TYPE_NONE;
 			case NAND_ECC_SOFT:
+			case NAND_ECC_SOFT_BCH:
 				return NAND_ECC_ENGINE_TYPE_SOFT;
 			case NAND_ECC_HW:
 			case NAND_ECC_HW_SYNDROME:
@@ -4920,43 +4930,29 @@ of_get_nand_ecc_engine_type(struct device_node *np)
 		}
 	}
 
-	/*
-	 * For backward compatibility we support few obsoleted values that don't
-	 * have their mappings into the nand_ecc_engine_providers enum anymore
-	 * (they were merged with other enums).
-	 */
-	if (!strcasecmp(pm, "soft_bch"))
-		return NAND_ECC_ENGINE_TYPE_SOFT;
-
 	return NAND_ECC_ENGINE_TYPE_INVALID;
 }
 
-static const char * const nand_ecc_algos[] = {
-	[NAND_ECC_ALGO_HAMMING]	= "hamming",
-	[NAND_ECC_ALGO_BCH]	= "bch",
-	[NAND_ECC_ALGO_RS]	= "rs",
-};
-
-static enum nand_ecc_algo of_get_nand_ecc_algo(struct device_node *np)
+enum nand_ecc_placement
+of_get_rawnand_ecc_placement_legacy(struct device_node *np)
 {
-	enum nand_ecc_algo ecc_algo;
 	const char *pm;
 	int err;
 
-	err = of_property_read_string(np, "nand-ecc-algo", &pm);
+	err = of_property_read_string(np, "nand-ecc-mode", &pm);
 	if (!err) {
-		for (ecc_algo = NAND_ECC_ALGO_HAMMING;
-		     ecc_algo < ARRAY_SIZE(nand_ecc_algos);
-		     ecc_algo++) {
-			if (!strcasecmp(pm, nand_ecc_algos[ecc_algo]))
-				return ecc_algo;
-		}
+		if (!strcasecmp(pm, "hw_syndrome"))
+			return NAND_ECC_PLACEMENT_INTERLEAVED;
 	}
 
-	/*
-	 * For backward compatibility we also read "nand-ecc-mode" checking
-	 * for some obsoleted values that were specifying ECC algorithm.
-	 */
+	return NAND_ECC_PLACEMENT_UNKNOWN;
+}
+
+static enum nand_ecc_algo of_get_rawnand_ecc_algo_legacy(struct device_node *np)
+{
+	const char *pm;
+	int err;
+
 	err = of_property_read_string(np, "nand-ecc-mode", &pm);
 	if (!err) {
 		if (!strcasecmp(pm, "soft"))
@@ -4968,22 +4964,19 @@ static enum nand_ecc_algo of_get_nand_ecc_algo(struct device_node *np)
 	return NAND_ECC_ALGO_UNKNOWN;
 }
 
-static int of_get_nand_ecc_step_size(struct device_node *np)
+static void of_get_nand_ecc_legacy_user_config(struct nand_chip *chip)
 {
-	int ret;
-	u32 val;
+	struct device_node *dn = nand_get_flash_node(chip);
+	struct nand_ecc_props *user_conf = &chip->base.ecc.user_conf;
 
-	ret = of_property_read_u32(np, "nand-ecc-step-size", &val);
-	return ret ? ret : val;
-}
+	if (user_conf->engine_type != NAND_ECC_ENGINE_TYPE_INVALID)
+		user_conf->engine_type = of_get_rawnand_ecc_engine_type_legacy(dn);
 
-static int of_get_nand_ecc_strength(struct device_node *np)
-{
-	int ret;
-	u32 val;
+	if (user_conf->algo != NAND_ECC_ALGO_UNKNOWN)
+		user_conf->algo = of_get_rawnand_ecc_algo_legacy(dn);
 
-	ret = of_property_read_u32(np, "nand-ecc-strength", &val);
-	return ret ? ret : val;
+	if (user_conf->placement != NAND_ECC_PLACEMENT_UNKNOWN)
+		user_conf->placement = of_get_rawnand_ecc_placement_legacy(dn);
 }
 
 static int of_get_nand_bus_width(struct device_node *np)
@@ -5007,12 +5000,10 @@ static bool of_get_nand_on_flash_bbt(struct device_node *np)
 	return of_property_read_bool(np, "nand-on-flash-bbt");
 }
 
-static int nand_dt_init(struct nand_chip *chip)
+static int rawnand_dt_init(struct nand_chip *chip)
 {
+	struct nand_device *nand = mtd_to_nanddev(nand_to_mtd(chip));
 	struct device_node *dn = nand_get_flash_node(chip);
-	enum nand_ecc_engine_type ecc_type;
-	enum nand_ecc_algo ecc_algo;
-	int ecc_strength, ecc_step;
 
 	if (!dn)
 		return 0;
@@ -5026,26 +5017,33 @@ static int nand_dt_init(struct nand_chip *chip)
 	if (of_get_nand_on_flash_bbt(dn))
 		chip->bbt_options |= NAND_BBT_USE_FLASH;
 
-	ecc_type = of_get_nand_ecc_engine_type(dn);
-	ecc_algo = of_get_nand_ecc_algo(dn);
-	ecc_strength = of_get_nand_ecc_strength(dn);
-	ecc_step = of_get_nand_ecc_step_size(dn);
-
-	if (ecc_type != NAND_ECC_ENGINE_TYPE_INVALID)
-		chip->ecc.engine_type = ecc_type;
-
-	if (ecc_algo != NAND_ECC_ALGO_UNKNOWN)
-		chip->ecc.algo = ecc_algo;
-
-	if (ecc_strength >= 0)
-		chip->ecc.strength = ecc_strength;
-
-	if (ecc_step > 0)
-		chip->ecc.size = ecc_step;
-
 	if (of_property_read_bool(dn, "nand-ecc-maximize"))
 		chip->ecc.options |= NAND_ECC_MAXIMIZE;
 
+	of_get_nand_ecc_user_config(nand);
+	of_get_nand_ecc_legacy_user_config(chip);
+
+	/*
+	 * If neither the user nor the NAND controller have requested a specific
+	 * ECC engine type, we will default to NAND_ECC_ENGINE_TYPE_ON_HOST.
+	 */
+	nand->ecc.defaults.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
+
+	/*
+	 * Use the user requested engine type, unless there is none, in this
+	 * case default to the NAND controller choice, otherwise fallback to
+	 * the raw NAND default one.
+	 */
+	if (nand->ecc.user_conf.engine_type != NAND_ECC_ENGINE_TYPE_INVALID)
+		chip->ecc.engine_type = nand->ecc.user_conf.engine_type;
+	if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_INVALID)
+		chip->ecc.engine_type = nand->ecc.defaults.engine_type;
+
+	chip->ecc.placement = nand->ecc.user_conf.placement;
+	chip->ecc.algo = nand->ecc.user_conf.algo;
+	chip->ecc.strength = nand->ecc.user_conf.strength;
+	chip->ecc.size = nand->ecc.user_conf.step_size;
+
 	return 0;
 }
 
@@ -5082,7 +5080,7 @@ static int nand_scan_ident(struct nand_chip *chip, unsigned int maxchips,
 	/* Enforce the right timings for reset/detection */
 	chip->current_interface_config = nand_get_reset_interface_config();
 
-	ret = nand_dt_init(chip);
+	ret = rawnand_dt_init(chip);
 	if (ret)
 		return ret;
 
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 1bbce6fa1b08..671e60948deb 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -81,18 +81,6 @@ struct nand_chip;
 
 #define NAND_DATA_IFACE_CHECK_ONLY	-1
 
-/*
- * Constants for ECC_MODES
- */
-enum nand_ecc_mode {
-	NAND_ECC_INVALID,
-	NAND_ECC_NONE,
-	NAND_ECC_SOFT,
-	NAND_ECC_HW,
-	NAND_ECC_HW_SYNDROME,
-	NAND_ECC_ON_DIE,
-};
-
 /*
  * Constants for Hardware ECC
  */
-- 
2.20.1


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^ permalink raw reply	[flat|nested] 57+ messages in thread

* [PATCH v13 20/20] mtd: rawnand: Use the NAND framework user_conf object for ECC flags
  2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
                   ` (18 preceding siblings ...)
  2020-08-27  8:52 ` [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits Miquel Raynal
@ 2020-08-27  8:52 ` Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
  19 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-08-27  8:52 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd

Instead of storing the ECC flags in chip->ecc.options, use
nanddev->ecc.user_conf.flags.

There is currently only one to save: NAND_ECC_MAXIMIZE.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/raw/atmel/nand-controller.c |  3 ++-
 drivers/mtd/nand/raw/denali_pci.c            |  2 +-
 drivers/mtd/nand/raw/nand_base.c             | 14 +++++++-------
 drivers/mtd/nand/raw/sunxi_nand.c            |  3 ++-
 drivers/mtd/nand/raw/tegra_nand.c            |  5 +++--
 include/linux/mtd/rawnand.h                  |  1 -
 6 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c
index 7fcc5e67163e..c3902e0e0b90 100644
--- a/drivers/mtd/nand/raw/atmel/nand-controller.c
+++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
@@ -1046,6 +1046,7 @@ static int atmel_nand_pmecc_init(struct nand_chip *chip)
 	const struct nand_ecc_props *requirements =
 		nanddev_get_ecc_requirements(&chip->base);
 	struct mtd_info *mtd = nand_to_mtd(chip);
+	struct nand_device *nanddev = mtd_to_nanddev(mtd);
 	struct atmel_nand *nand = to_atmel_nand(chip);
 	struct atmel_nand_controller *nc;
 	struct atmel_pmecc_user_req req;
@@ -1070,7 +1071,7 @@ static int atmel_nand_pmecc_init(struct nand_chip *chip)
 			chip->ecc.size = val;
 	}
 
-	if (chip->ecc.options & NAND_ECC_MAXIMIZE)
+	if (nanddev->ecc.user_conf.flags & NAND_ECC_MAXIMIZE_STRENGTH)
 		req.ecc.strength = ATMEL_PMECC_MAXIMIZE_ECC_STRENGTH;
 	else if (chip->ecc.strength)
 		req.ecc.strength = chip->ecc.strength;
diff --git a/drivers/mtd/nand/raw/denali_pci.c b/drivers/mtd/nand/raw/denali_pci.c
index 2f77ee55e1bf..20c085a30adc 100644
--- a/drivers/mtd/nand/raw/denali_pci.c
+++ b/drivers/mtd/nand/raw/denali_pci.c
@@ -100,7 +100,7 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 		goto out_remove_denali;
 	}
 
-	dchip->chip.ecc.options |= NAND_ECC_MAXIMIZE;
+	dchip->chip.base.ecc.user_conf.flags |= NAND_ECC_MAXIMIZE_STRENGTH;
 
 	dchip->nsels = nsels;
 
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 6a5f5699514f..10ac9c103237 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5017,9 +5017,6 @@ static int rawnand_dt_init(struct nand_chip *chip)
 	if (of_get_nand_on_flash_bbt(dn))
 		chip->bbt_options |= NAND_BBT_USE_FLASH;
 
-	if (of_property_read_bool(dn, "nand-ecc-maximize"))
-		chip->ecc.options |= NAND_ECC_MAXIMIZE;
-
 	of_get_nand_ecc_user_config(nand);
 	of_get_nand_ecc_legacy_user_config(chip);
 
@@ -5150,6 +5147,7 @@ static void nand_scan_ident_cleanup(struct nand_chip *chip)
 static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 {
 	struct mtd_info *mtd = nand_to_mtd(chip);
+	struct nand_device *nanddev = mtd_to_nanddev(mtd);
 	struct nand_ecc_ctrl *ecc = &chip->ecc;
 
 	if (WARN_ON(ecc->engine_type != NAND_ECC_ENGINE_TYPE_SOFT))
@@ -5225,7 +5223,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip *chip)
 		 * used.
 		 */
 		if (mtd->ooblayout == nand_get_large_page_ooblayout() &&
-		    ecc->options & NAND_ECC_MAXIMIZE) {
+		    nanddev->ecc.user_conf.flags & NAND_ECC_MAXIMIZE_STRENGTH) {
 			int steps, bytes;
 
 			/* Always prefer 1k blocks over 512bytes ones */
@@ -5465,11 +5463,12 @@ nand_maximize_ecc(struct nand_chip *chip,
  * @caps: ECC engine caps info structure
  * @oobavail: OOB size that the ECC engine can use
  *
- * Choose the ECC configuration according to following logic
+ * Choose the ECC configuration according to following logic.
  *
  * 1. If both ECC step size and ECC strength are already set (usually by DT)
  *    then check if it is supported by this controller.
- * 2. If NAND_ECC_MAXIMIZE is set, then select maximum ECC strength.
+ * 2. If the user provided the nand-ecc-maximize property, then select maximum
+ *    ECC strength.
  * 3. Otherwise, try to match the ECC step size and ECC strength closest
  *    to the chip's requirement. If available OOB size can't fit the chip
  *    requirement then fallback to the maximum ECC step size and ECC strength.
@@ -5480,6 +5479,7 @@ int nand_ecc_choose_conf(struct nand_chip *chip,
 			 const struct nand_ecc_caps *caps, int oobavail)
 {
 	struct mtd_info *mtd = nand_to_mtd(chip);
+	struct nand_device *nanddev = mtd_to_nanddev(mtd);
 
 	if (WARN_ON(oobavail < 0 || oobavail > mtd->oobsize))
 		return -EINVAL;
@@ -5487,7 +5487,7 @@ int nand_ecc_choose_conf(struct nand_chip *chip,
 	if (chip->ecc.size && chip->ecc.strength)
 		return nand_check_ecc_caps(chip, caps, oobavail);
 
-	if (chip->ecc.options & NAND_ECC_MAXIMIZE)
+	if (nanddev->ecc.user_conf.flags & NAND_ECC_MAXIMIZE_STRENGTH)
 		return nand_maximize_ecc(chip, caps, oobavail);
 
 	if (!nand_match_ecc_req(chip, caps, oobavail))
diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index b7b764ef4b1d..2a7ca3072f35 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1609,12 +1609,13 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
 	static const u8 strengths[] = { 16, 24, 28, 32, 40, 48, 56, 60, 64 };
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	struct mtd_info *mtd = nand_to_mtd(nand);
+	struct nand_device *nanddev = mtd_to_nanddev(mtd);
 	struct sunxi_nand_hw_ecc *data;
 	int nsectors;
 	int ret;
 	int i;
 
-	if (ecc->options & NAND_ECC_MAXIMIZE) {
+	if (nanddev->ecc.user_conf.flags & NAND_ECC_MAXIMIZE_STRENGTH) {
 		int bytes;
 
 		ecc->size = 1024;
diff --git a/drivers/mtd/nand/raw/tegra_nand.c b/drivers/mtd/nand/raw/tegra_nand.c
index 100c18ef8fe8..fbf67722a049 100644
--- a/drivers/mtd/nand/raw/tegra_nand.c
+++ b/drivers/mtd/nand/raw/tegra_nand.c
@@ -840,9 +840,10 @@ static int tegra_nand_get_strength(struct nand_chip *chip, const int *strength,
 				   int strength_len, int bits_per_step,
 				   int oobsize)
 {
+	struct nand_device *base = mtd_to_nanddev(nand_to_mtd(chip));
 	const struct nand_ecc_props *requirements =
-		nanddev_get_ecc_requirements(&chip->base);
-	bool maximize = chip->ecc.options & NAND_ECC_MAXIMIZE;
+		nanddev_get_ecc_requirements(base);
+	bool maximize = base->ecc.user_conf.flags & NAND_ECC_MAXIMIZE_STRENGTH;
 	int i;
 
 	/*
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 671e60948deb..aac07940de09 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -98,7 +98,6 @@ struct nand_chip;
  * pages and you want to rely on the default implementation.
  */
 #define NAND_ECC_GENERIC_ERASED_CHECK	BIT(0)
-#define NAND_ECC_MAXIMIZE		BIT(1)
 
 /*
  * Option constants for bizarre disfunctionality and real
-- 
2.20.1


______________________________________________________
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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 20/20] mtd: rawnand: Use the NAND framework user_conf object for ECC flags
  2020-08-27  8:52 ` [PATCH v13 20/20] mtd: rawnand: Use the NAND framework user_conf object for ECC flags Miquel Raynal
@ 2020-09-07  7:23   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:23 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:08 UTC, Miquel Raynal wrote:
> Instead of storing the ECC flags in chip->ecc.options, use
> nanddev->ecc.user_conf.flags.
> 
> There is currently only one to save: NAND_ECC_MAXIMIZE.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits
  2020-08-27  8:52 ` [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits Miquel Raynal
@ 2020-09-07  7:23   ` Miquel Raynal
  2020-09-21  9:36   ` Sascha Hauer
  1 sibling, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:23 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:07 UTC, Miquel Raynal wrote:
> Many helpers are generic to all NAND chips, they should not be
> raw-NAND specific, so use the generic ones.
> 
> To avoid moving all the raw NAND core "history" into the generic NAND
> layer, we keep a part of this parsing in the raw NAND core to ensure
> backward compatibility.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 18/20] mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper
  2020-08-27  8:52 ` [PATCH v13 18/20] mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper Miquel Raynal
@ 2020-09-07  7:23   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:23 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:06 UTC, Miquel Raynal wrote:
> Plus, the new helper has a more "english" name.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts
  2020-08-27  8:52 ` [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts Miquel Raynal
@ 2020-09-07  7:23   ` Miquel Raynal
  2020-09-20 12:21   ` Janusz Krzysztofik
  1 sibling, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:23 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:05 UTC, Miquel Raynal wrote:
> No need to have our own in the raw NAND core.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 16/20] mtd: rawnand: Make use of the ECC framework
  2020-08-27  8:52 ` [PATCH v13 16/20] mtd: rawnand: Make use of the ECC framework Miquel Raynal
@ 2020-09-07  7:23   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:23 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:04 UTC, Miquel Raynal wrote:
> Just enable the ECC framework with raw NAND so that we can drop, one
> by one, all the unnecessary/redundant definitions.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 15/20] mtd: nand: Use the new generic ECC object
  2020-08-27  8:52 ` [PATCH v13 15/20] mtd: nand: Use the new generic ECC object Miquel Raynal
@ 2020-09-07  7:23   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:23 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:03 UTC, Miquel Raynal wrote:
> Embed a generic NAND ECC high-level object in the nand_device
> structure to carry all the ECC engine configuration/data.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 14/20] mtd: rawnand: Use nanddev_get/set_ecc_requirements() when relevant
  2020-08-27  8:52 ` [PATCH v13 14/20] mtd: rawnand: Use nanddev_get/set_ecc_requirements() when relevant Miquel Raynal
@ 2020-09-07  7:23   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:23 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:02 UTC, Miquel Raynal wrote:
> Instead of accessing ->strength/step_size directly.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 13/20] mtd: nand: Create helpers to set/extract the ECC requirements
  2020-08-27  8:52 ` [PATCH v13 13/20] mtd: nand: Create helpers to set/extract the ECC requirements Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:01 UTC, Miquel Raynal wrote:
> Despite its current name, the eccreq field actually encodes both the
> NAND requirements and the final ECC configuration. That works fine when
> using on-die ECC since those 2 concepts match perfectly, but it starts
> being a problem as soon as we use on-host ECC engines, where we're not
> guaranteed to have a perfect match.
> 
> Let's hide the ECC requirements access behind helpers so we can later
> split those 2 concepts. As the structures have not been clarified yet,
> these helpers access the same internal variable as
> nanddev_get_ecc_conf() for now.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 12/20] mtd: spinand: Use nanddev_get_ecc_conf() when relevant
  2020-08-27  8:52 ` [PATCH v13 12/20] mtd: spinand: Use nanddev_get_ecc_conf() when relevant Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:52:00 UTC, Miquel Raynal wrote:
> Instead of accessing ->strength/step_size directly.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 11/20] mtd: nand: Create a helper to extract the ECC configuration
  2020-08-27  8:51 ` [PATCH v13 11/20] mtd: nand: Create a helper to extract the ECC configuration Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:59 UTC, Miquel Raynal wrote:
> Despite its current name, the eccreq field actually encodes both the
> NAND requirements and the final ECC configuration. That works fine when
> using on-die ECC since those 2 concepts match perfectly, but it starts
> being a problem as soon as we use on-host ECC engines, where we're not
> guaranteed to have a perfect match.
> 
> Let's hide the ECC configuration access behind a helper so we can later
> split those 2 concepts.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 10/20] mtd: rawnand: Use the new ECC engine type enumeration
  2020-08-27  8:51 ` [PATCH v13 10/20] mtd: rawnand: Use the new ECC engine type enumeration Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:58 UTC, Miquel Raynal wrote:
> Mechanical switch from the legacy "mode" enumeration to the new
> "engine type" enumeration in drivers and board files.
> 
> The device tree parsing is also updated to return the new enumeration
> from the old strings.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-08-27  8:51 ` [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  2020-10-14 21:36   ` Han Xu
  1 sibling, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:57 UTC, Miquel Raynal wrote:
> The use of "syndrome" placement should not be encoded in the ECC
> engine mode/type.
> 
> Create a "placement" field in NAND chip and change all occurrences of
> the NAND_ECC_HW_SYNDROME enumeration to be just NAND_ECC_HW and
> possibly a placement entry like NAND_ECC_PLACEMENT_INTERLEAVED.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 08/20] mtd: nand: Introduce the ECC engine framework
  2020-08-27  8:51 ` [PATCH v13 08/20] mtd: nand: Introduce the ECC engine framework Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:56 UTC, Miquel Raynal wrote:
> Create a generic ECC engine framework. This is a base to instantiate ECC
> engine objects.
> 
> If we really want to be generic, bindings must evolve, so here is the
> new logic. The following three properties are mutually exclusive:
> - The nand-no-ecc-engine boolean property is set and there is no
>   ECC engine to retrieve.
> - The nand-use-soft-ecc-engine boolean property is set and the core
>   will force using the use of software correction.
> - There is a nand-ecc-engine property pointing at a node which will
>   act as ECC engine.
> 
> It the later case, the property may reference:
> - The NAND chip node itself (for the on-die ECC case).
> - The parent node if the NAND controller embeds an ECC engine.
> - Any other node being an external ECC controller as well.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 07/20] dt-bindings: mtd: Document boolean NAND ECC properties
  2020-08-27  8:51 ` [PATCH v13 07/20] dt-bindings: mtd: Document boolean NAND ECC properties Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:55 UTC, Miquel Raynal wrote:
> Document nand-use-soft-ecc-engine and nand-no-ecc-engine properties.
> The former is here to force software correction, the latter prevents
> any correction to happen.
> 
> These properties (along with nand-ecc-engine) are supposed to be more
> accurate than the current nand-ecc-modes wich is very misleading and
> very often people think it is mandatory while the core should be
> relied upon to decide which correction to handle.
> 
> nand-ecc-mode was already inacurate, but it becomes totally
> problematic with setups where there are several hardware engines.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Rob Herring <robh@kernel.org>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 06/20] dt-bindings: mtd: Document nand-ecc-engine
  2020-08-27  8:51 ` [PATCH v13 06/20] dt-bindings: mtd: Document nand-ecc-engine Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:54 UTC, Miquel Raynal wrote:
> This property is needed to precisely point to the hardware ECC engine
> to use when there are several of them available. Here, hardware also
> refers to the on-die possibility.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Rob Herring <robh@kernel.org>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 05/20] dt-bindings: mtd: Document nand-ecc-placement
  2020-08-27  8:51 ` [PATCH v13 05/20] dt-bindings: mtd: Document nand-ecc-placement Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:53 UTC, Miquel Raynal wrote:
> This optional property defines where the ECC bytes are expected to be
> stored. No value defaults to an unknown location, while these
> locations can be explicitly set to OOB or interleaved depending if
> the ECC bytes are entirely stored in the OOB area or mixed with
> regular data in the main area (also sometimes referred as
> "syndrome").
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> Acked-by: Rob Herring <robh@kernel.org>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 04/20] mtd: nand: Add a NAND page I/O request type
  2020-08-27  8:51 ` [PATCH v13 04/20] mtd: nand: Add a NAND page I/O request type Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:52 UTC, Miquel Raynal wrote:
> Use an enum to differentiate the type of I/O (reading or writing a
> page). Also update the request iterator.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 03/20] mtd: rawnand: Move the nand_ecc_algo enum to the generic NAND layer
  2020-08-27  8:51 ` [PATCH v13 03/20] mtd: rawnand: Move the nand_ecc_algo enum to the generic NAND layer Miquel Raynal
@ 2020-09-07  7:24   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:24 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:51 UTC, Miquel Raynal wrote:
> This enumeration is generic and will be reused NAND-wide.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 02/20] mtd: rawnand: Rename the ECC algorithm enumeration items
  2020-08-27  8:51 ` [PATCH v13 02/20] mtd: rawnand: Rename the ECC algorithm enumeration items Miquel Raynal
@ 2020-09-07  7:25   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:25 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:50 UTC, Miquel Raynal wrote:
> NAND_ECC_ is not a meaningful prefix, use NAND_ECC_ALGO_ instead.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 01/20] mtd: rawnand: Add a kernel doc to the ECC algorithm enumeration
  2020-08-27  8:51 ` [PATCH v13 01/20] mtd: rawnand: Add a kernel doc to the ECC algorithm enumeration Miquel Raynal
@ 2020-09-07  7:25   ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-07  7:25 UTC (permalink / raw)
  To: Miquel Raynal, Richard Weinberger, Vignesh Raghavendra,
	Tudor Ambarus, linux-mtd

On Thu, 2020-08-27 at 08:51:49 UTC, Miquel Raynal wrote:
> Before moving it to the generic raw NAND core, ensure the enumeration
> is properly described.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next.

Miquel

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts
  2020-08-27  8:52 ` [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
@ 2020-09-20 12:21   ` Janusz Krzysztofik
  2020-09-29  8:15     ` Miquel Raynal
  1 sibling, 1 reply; 57+ messages in thread
From: Janusz Krzysztofik @ 2020-09-20 12:21 UTC (permalink / raw)
  To: Richard Weinberger, Vignesh Raghavendra, Tudor Ambarus, linux-mtd
  Cc: Miquel Raynal

On Thursday, August 27, 2020 10:52:05 A.M. CEST Miquel Raynal wrote:
> No need to have our own in the raw NAND core.

Hi Miquel,

This patch introduced a regression for me, at least on ams-delta which sets 
nand_chip->ecc.engine_type to NAND_ECC_ENGINE_TYPE_SOFT and 
nand_chip.ecc->algo to NAND_ECC_ALGO_HAMMING.  No related kernel messages 
could be observed, but nanddump fails with "pread: Numerical result out of 
range" for me.

The ECC framework OOB layouts refer to nand_device->ecc.ctx.total which no 
driver nor ECC engine initializes so far, while the old layouts used to refer 
to nand_chip->ecc.total, still initialized by nand_scan_tail().  Is there any 
work in progress which will address the issue (initialization of 
nand_device->ecc.ctx.total at least)?

Thanks,
Janusz

> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> ---
>  drivers/mtd/nand/raw/arasan-nand-controller.c |   2 +-
>  drivers/mtd/nand/raw/atmel/nand-controller.c  |   2 +-
>  drivers/mtd/nand/raw/davinci_nand.c           |   3 +-
>  .../mtd/nand/raw/ingenic/ingenic_nand_drv.c   |   6 +-
>  drivers/mtd/nand/raw/nand_base.c              | 171 +-----------------
>  drivers/mtd/nand/raw/nand_toshiba.c           |   2 +-
>  drivers/mtd/nand/raw/vf610_nfc.c              |   2 +-
>  include/linux/mtd/rawnand.h                   |   4 +-
>  8 files changed, 16 insertions(+), 176 deletions(-)
> 
> diff --git a/drivers/mtd/nand/raw/arasan-nand-controller.c b/drivers/mtd/
nand/raw/arasan-nand-controller.c
> index 006bc3d3ce20..fbb4ea751be8 100644
> --- a/drivers/mtd/nand/raw/arasan-nand-controller.c
> +++ b/drivers/mtd/nand/raw/arasan-nand-controller.c
> @@ -980,7 +980,7 @@ static int anfc_init_hw_ecc_controller(struct arasan_nfc 
*nfc,
>  		return -EINVAL;
>  	}
>  
> -	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
> +	mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
>  
>  	ecc->steps = mtd->writesize / ecc->size;
>  	ecc->algo = NAND_ECC_ALGO_BCH;
> diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/
raw/atmel/nand-controller.c
> index 3d162fdc9ce2..7fcc5e67163e 100644
> --- a/drivers/mtd/nand/raw/atmel/nand-controller.c
> +++ b/drivers/mtd/nand/raw/atmel/nand-controller.c
> @@ -1108,7 +1108,7 @@ static int atmel_nand_pmecc_init(struct nand_chip 
*chip)
>  
>  	chip->options |= NAND_NO_SUBPAGE_WRITE;
>  
> -	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
> +	mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
>  
>  	return 0;
>  }
> diff --git a/drivers/mtd/nand/raw/davinci_nand.c b/drivers/mtd/nand/raw/
davinci_nand.c
> index 58966a9706b1..427f320fb79b 100644
> --- a/drivers/mtd/nand/raw/davinci_nand.c
> +++ b/drivers/mtd/nand/raw/davinci_nand.c
> @@ -645,7 +645,8 @@ static int davinci_nand_attach_chip(struct nand_chip 
*chip)
>  				mtd_set_ooblayout(mtd,
>  						  
&hwecc4_small_ooblayout_ops);
>  			} else if (chunks == 4 || chunks == 8) {
> -				mtd_set_ooblayout(mtd, 
&nand_ooblayout_lp_ops);
> +				mtd_set_ooblayout(mtd,
> +						  
nand_get_large_page_ooblayout());
>  				info->chip.ecc.read_page = 
nand_davinci_read_page_hwecc_oob_first;
>  			} else {
>  				return -EIO;
> diff --git a/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c b/drivers/mtd/
nand/raw/ingenic/ingenic_nand_drv.c
> index 70309f18124c..0e9d426fe4f2 100644
> --- a/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
> +++ b/drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c
> @@ -243,8 +243,10 @@ static int ingenic_nand_attach_chip(struct nand_chip 
*chip)
>  	/* For legacy reasons we use a different layout on the qi,lb60 
board. */
>  	if (of_machine_is_compatible("qi,lb60"))
>  		mtd_set_ooblayout(mtd, &qi_lb60_ooblayout_ops);
> -	else
> +	else if (nfc->soc_info->oob_layout)
>  		mtd_set_ooblayout(mtd, nfc->soc_info->oob_layout);
> +	else
> +		mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
>  
>  	return 0;
>  }
> @@ -532,7 +534,6 @@ static const struct jz_soc_info jz4740_soc_info = {
>  	.data_offset = 0x00000000,
>  	.cmd_offset = 0x00008000,
>  	.addr_offset = 0x00010000,
> -	.oob_layout = &nand_ooblayout_lp_ops,
>  };
>  
>  static const struct jz_soc_info jz4725b_soc_info = {
> @@ -546,7 +547,6 @@ static const struct jz_soc_info jz4780_soc_info = {
>  	.data_offset = 0x00000000,
>  	.cmd_offset = 0x00400000,
>  	.addr_offset = 0x00800000,
> -	.oob_layout = &nand_ooblayout_lp_ops,
>  };
>  
>  static const struct of_device_id ingenic_nand_dt_match[] = {
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/
nand_base.c
> index b4ea831ecd85..77f60849dfb4 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -46,166 +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 nand_pairing_dist3_get_info(struct mtd_info *mtd, int page,
>  				       struct mtd_pairing_info 
*info)
>  {
> @@ -5377,7 +5217,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip 
*chip)
>  				return -EINVAL;
>  			}
>  
> -			mtd_set_ooblayout(mtd, 
&nand_ooblayout_lp_ops);
> +			mtd_set_ooblayout(mtd, 
nand_get_large_page_ooblayout());
>  
>  		}
>  
> @@ -5386,7 +5226,7 @@ static int nand_set_ecc_soft_ops(struct nand_chip 
*chip)
>  		 * used, otherwise we don't know how many bytes can 
really be
>  		 * used.
>  		 */
> -		if (mtd->ooblayout == &nand_ooblayout_lp_ops &&
> +		if (mtd->ooblayout == nand_get_large_page_ooblayout() &&
>  		    ecc->options & NAND_ECC_MAXIMIZE) {
>  			int steps, bytes;
>  
> @@ -5788,11 +5628,12 @@ static int nand_scan_tail(struct nand_chip *chip)
>  		switch (mtd->oobsize) {
>  		case 8:
>  		case 16:
> -			mtd_set_ooblayout(mtd, 
&nand_ooblayout_sp_ops);
> +			mtd_set_ooblayout(mtd, 
nand_get_small_page_ooblayout());
>  			break;
>  		case 64:
>  		case 128:
> -			mtd_set_ooblayout(mtd, 
&nand_ooblayout_lp_hamming_ops);
> +			mtd_set_ooblayout(mtd,
> +					  
nand_get_large_page_hamming_ooblayout());
>  			break;
>  		default:
>  			/*
> @@ -5804,7 +5645,7 @@ static int nand_scan_tail(struct nand_chip *chip)
>  			 */
>  			if (ecc->engine_type == 
NAND_ECC_ENGINE_TYPE_NONE) {
>  				mtd_set_ooblayout(mtd,
> -						
&nand_ooblayout_lp_ops);
> +						  
nand_get_large_page_ooblayout());
>  				break;
>  			}
>  
> diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/
nand_toshiba.c
> index fb6662337b90..cf4f37959421 100644
> --- a/drivers/mtd/nand/raw/nand_toshiba.c
> +++ b/drivers/mtd/nand/raw/nand_toshiba.c
> @@ -140,7 +140,7 @@ static void toshiba_nand_benand_init(struct nand_chip 
*chip)
>  
>  	chip->options |= NAND_SUBPAGE_READ;
>  
> -	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
> +	mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
>  }
>  
>  static void toshiba_nand_decode_id(struct nand_chip *chip)
> diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/
vf610_nfc.c
> index 8ee2c1f539c4..50dc0c93140c 100644
> --- a/drivers/mtd/nand/raw/vf610_nfc.c
> +++ b/drivers/mtd/nand/raw/vf610_nfc.c
> @@ -779,7 +779,7 @@ static int vf610_nfc_attach_chip(struct nand_chip *chip)
>  		mtd->oobsize = 64;
>  
>  	/* Use default large page ECC layout defined in NAND core */
> -	mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
> +	mtd_set_ooblayout(mtd, nand_get_large_page_ooblayout());
>  	if (chip->ecc.strength == 32) {
>  		nfc->ecc_mode = ECC_60_BYTE;
>  		chip->ecc.bytes = 60;
> diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
> index 967b616c50df..1bbce6fa1b08 100644
> --- a/include/linux/mtd/rawnand.h
> +++ b/include/linux/mtd/rawnand.h
> @@ -14,6 +14,7 @@
>  #define __LINUX_MTD_RAWNAND_H
>  
>  #include <linux/mtd/mtd.h>
> +#include <linux/mtd/nand.h>
>  #include <linux/mtd/flashchip.h>
>  #include <linux/mtd/bbm.h>
>  #include <linux/mtd/jedec.h>
> @@ -1156,9 +1157,6 @@ struct nand_chip {
>  	void *priv;
>  };
>  
> -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);
> 





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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits
  2020-08-27  8:52 ` [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits Miquel Raynal
  2020-09-07  7:23   ` Miquel Raynal
@ 2020-09-21  9:36   ` Sascha Hauer
  2020-09-28 15:18     ` Miquel Raynal
  1 sibling, 1 reply; 57+ messages in thread
From: Sascha Hauer @ 2020-09-21  9:36 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: Richard Weinberger, linux-mtd, Vignesh Raghavendra,
	Fabio Estevam, Tudor Ambarus

On Thu, Aug 27, 2020 at 10:52:07AM +0200, Miquel Raynal wrote:
> Many helpers are generic to all NAND chips, they should not be
> raw-NAND specific, so use the generic ones.
> 
> To avoid moving all the raw NAND core "history" into the generic NAND
> layer, we keep a part of this parsing in the raw NAND core to ensure
> backward compatibility.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> ---

...

> -static int of_get_nand_ecc_step_size(struct device_node *np)
> +static void of_get_nand_ecc_legacy_user_config(struct nand_chip *chip)
>  {
> -	int ret;
> -	u32 val;
> +	struct device_node *dn = nand_get_flash_node(chip);
> +	struct nand_ecc_props *user_conf = &chip->base.ecc.user_conf;
>  
> -	ret = of_property_read_u32(np, "nand-ecc-step-size", &val);
> -	return ret ? ret : val;
> -}
> +	if (user_conf->engine_type != NAND_ECC_ENGINE_TYPE_INVALID)
> +		user_conf->engine_type = of_get_rawnand_ecc_engine_type_legacy(dn);

I think the intention is to set user_conf->engine_type when it's not set already,
so this should be == instead of !=

>  
> -static int of_get_nand_ecc_strength(struct device_node *np)
> -{
> -	int ret;
> -	u32 val;
> +	if (user_conf->algo != NAND_ECC_ALGO_UNKNOWN)
> +		user_conf->algo = of_get_rawnand_ecc_algo_legacy(dn);

ditto

>  
> -	ret = of_property_read_u32(np, "nand-ecc-strength", &val);
> -	return ret ? ret : val;
> +	if (user_conf->placement != NAND_ECC_PLACEMENT_UNKNOWN)
> +		user_conf->placement = of_get_rawnand_ecc_placement_legacy(dn);

ditto

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits
  2020-09-21  9:36   ` Sascha Hauer
@ 2020-09-28 15:18     ` Miquel Raynal
  0 siblings, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-09-28 15:18 UTC (permalink / raw)
  To: Sascha Hauer
  Cc: Richard Weinberger, linux-mtd, Vignesh Raghavendra,
	Fabio Estevam, Tudor Ambarus

Hi Sascha,

Sascha Hauer <s.hauer@pengutronix.de> wrote on Mon, 21 Sep 2020
11:36:03 +0200:

> On Thu, Aug 27, 2020 at 10:52:07AM +0200, Miquel Raynal wrote:
> > Many helpers are generic to all NAND chips, they should not be
> > raw-NAND specific, so use the generic ones.
> > 
> > To avoid moving all the raw NAND core "history" into the generic NAND
> > layer, we keep a part of this parsing in the raw NAND core to ensure
> > backward compatibility.
> > 
> > Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> > ---  
> 
> ...
> 
> > -static int of_get_nand_ecc_step_size(struct device_node *np)
> > +static void of_get_nand_ecc_legacy_user_config(struct nand_chip *chip)
> >  {
> > -	int ret;
> > -	u32 val;
> > +	struct device_node *dn = nand_get_flash_node(chip);
> > +	struct nand_ecc_props *user_conf = &chip->base.ecc.user_conf;
> >  
> > -	ret = of_property_read_u32(np, "nand-ecc-step-size", &val);
> > -	return ret ? ret : val;
> > -}
> > +	if (user_conf->engine_type != NAND_ECC_ENGINE_TYPE_INVALID)
> > +		user_conf->engine_type = of_get_rawnand_ecc_engine_type_legacy(dn);  
> 
> I think the intention is to set user_conf->engine_type when it's not set already,
> so this should be == instead of !=
> 
> >  
> > -static int of_get_nand_ecc_strength(struct device_node *np)
> > -{
> > -	int ret;
> > -	u32 val;
> > +	if (user_conf->algo != NAND_ECC_ALGO_UNKNOWN)
> > +		user_conf->algo = of_get_rawnand_ecc_algo_legacy(dn);  
> 
> ditto
> 
> >  
> > -	ret = of_property_read_u32(np, "nand-ecc-strength", &val);
> > -	return ret ? ret : val;
> > +	if (user_conf->placement != NAND_ECC_PLACEMENT_UNKNOWN)
> > +		user_conf->placement = of_get_rawnand_ecc_placement_legacy(dn);  
> 
> ditto
> 
> Sascha
> 

Sorry for the delay I was away.

You are completely right, I messed up with the logic here... This is
now fixed, thanks!

Miquèl

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts
  2020-09-20 12:21   ` Janusz Krzysztofik
@ 2020-09-29  8:15     ` Miquel Raynal
  2020-09-29 21:26       ` Janusz Krzysztofik
  0 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-09-29  8:15 UTC (permalink / raw)
  To: Janusz Krzysztofik
  Cc: Richard Weinberger, linux-mtd, Vignesh Raghavendra, Tudor Ambarus

Hi Janusz,

Janusz Krzysztofik <jmkrzyszt@gmail.com> wrote on Sun, 20 Sep 2020
14:21:44 +0200:

> On Thursday, August 27, 2020 10:52:05 A.M. CEST Miquel Raynal wrote:
> > No need to have our own in the raw NAND core.  
> 
> Hi Miquel,
> 
> This patch introduced a regression for me, at least on ams-delta which sets 
> nand_chip->ecc.engine_type to NAND_ECC_ENGINE_TYPE_SOFT and 
> nand_chip.ecc->algo to NAND_ECC_ALGO_HAMMING.  No related kernel messages 
> could be observed, but nanddump fails with "pread: Numerical result out of 
> range" for me.

Thanks for the report and sorry for the delay!

> The ECC framework OOB layouts refer to nand_device->ecc.ctx.total which no 
> driver nor ECC engine initializes so far, while the old layouts used to refer 
> to nand_chip->ecc.total, still initialized by nand_scan_tail().  Is there any 
> work in progress which will address the issue (initialization of 
> nand_device->ecc.ctx.total at least)?

Indeed, there are more changes coming and the update of ecc.ctx.total
was done in an upcoming patch. It makes sense to update this entry when
switching to the "generic" layouts, so I moved the line in this patch.

I just updated nand/next, please tell me if it fixed your setup?

Thanks,
Miquèl

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts
  2020-09-29  8:15     ` Miquel Raynal
@ 2020-09-29 21:26       ` Janusz Krzysztofik
  0 siblings, 0 replies; 57+ messages in thread
From: Janusz Krzysztofik @ 2020-09-29 21:26 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: Richard Weinberger, linux-mtd, Vignesh Raghavendra, Tudor Ambarus

Hi Miquel,

On Tuesday, September 29, 2020 10:15:01 A.M. CEST Miquel Raynal wrote:
> Hi Janusz,
> 
> Janusz Krzysztofik <jmkrzyszt@gmail.com> wrote on Sun, 20 Sep 2020
> 14:21:44 +0200:
> 
> > On Thursday, August 27, 2020 10:52:05 A.M. CEST Miquel Raynal wrote:
> > > No need to have our own in the raw NAND core.  
> > 
> > Hi Miquel,
> > 
> > This patch introduced a regression for me, at least on ams-delta which 
sets 
> > nand_chip->ecc.engine_type to NAND_ECC_ENGINE_TYPE_SOFT and 
> > nand_chip.ecc->algo to NAND_ECC_ALGO_HAMMING.  No related kernel messages 
> > could be observed, but nanddump fails with "pread: Numerical result out of 
> > range" for me.
> 
> Thanks for the report and sorry for the delay!
> 
> > The ECC framework OOB layouts refer to nand_device->ecc.ctx.total which no 
> > driver nor ECC engine initializes so far, while the old layouts used to 
refer 
> > to nand_chip->ecc.total, still initialized by nand_scan_tail().  Is there 
any 
> > work in progress which will address the issue (initialization of 
> > nand_device->ecc.ctx.total at least)?
> 
> Indeed, there are more changes coming and the update of ecc.ctx.total
> was done in an upcoming patch. It makes sense to update this entry when
> switching to the "generic" layouts, so I moved the line in this patch.
> 
> I just updated nand/next, please tell me if it fixed your setup?

I won't be able to test it before next week, however looking at the updated 
patch I think the issue should be solved since a similar line did help when I 
added it at the end of ams-delta's .probe().

Thanks,
Janusz

> 
> Thanks,
> Miquèl
> 





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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-08-27  8:51 ` [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement Miquel Raynal
  2020-09-07  7:24   ` Miquel Raynal
@ 2020-10-14 21:36   ` Han Xu
  2020-10-15  1:35     ` Fabio Estevam
  1 sibling, 1 reply; 57+ messages in thread
From: Han Xu @ 2020-10-14 21:36 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: Richard Weinberger, linux-mtd, Vignesh Raghavendra, Tudor Ambarus

On Thu, Aug 27, 2020 at 3:55 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote:
>
> The use of "syndrome" placement should not be encoded in the ECC
> engine mode/type.
>
> Create a "placement" field in NAND chip and change all occurrences of
> the NAND_ECC_HW_SYNDROME enumeration to be just NAND_ECC_HW and
> possibly a placement entry like NAND_ECC_PLACEMENT_INTERLEAVED.
>
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> ---
>  arch/arm/mach-davinci/board-dm355-leopard.c |   3 +-
>  drivers/mtd/nand/raw/cafe_nand.c            |   3 +-
>  drivers/mtd/nand/raw/davinci_nand.c         |   5 +-
>  drivers/mtd/nand/raw/denali.c               |   3 +-
>  drivers/mtd/nand/raw/diskonchip.c           |   3 +-
>  drivers/mtd/nand/raw/lpc32xx_slc.c          |   3 +-
>  drivers/mtd/nand/raw/nand_base.c            | 109 +++++++++++---------
>  drivers/mtd/nand/raw/r852.c                 |   3 +-
>  include/linux/mtd/rawnand.h                 |   6 +-
>  include/linux/platform_data/mtd-davinci.h   |   1 +
>  10 files changed, 81 insertions(+), 58 deletions(-)
>
> diff --git a/arch/arm/mach-davinci/board-dm355-leopard.c b/arch/arm/mach-davinci/board-dm355-leopard.c
> index b9e9950dd300..4c8a592754ac 100644
> --- a/arch/arm/mach-davinci/board-dm355-leopard.c
> +++ b/arch/arm/mach-davinci/board-dm355-leopard.c
> @@ -76,7 +76,8 @@ static struct davinci_nand_pdata davinci_nand_data = {
>         .mask_chipsel           = BIT(14),
>         .parts                  = davinci_nand_partitions,
>         .nr_parts               = ARRAY_SIZE(davinci_nand_partitions),
> -       .ecc_mode               = NAND_ECC_HW_SYNDROME,
> +       .ecc_mode               = NAND_HW_ECC_ENGINE,
> +       .ecc_placement          = NAND_ECC_PLACEMENT_INTERLEAVED,
>         .ecc_bits               = 4,
>         .bbt_options            = NAND_BBT_USE_FLASH,
>  };
> diff --git a/drivers/mtd/nand/raw/cafe_nand.c b/drivers/mtd/nand/raw/cafe_nand.c
> index 92173790f20b..2bf8ab542e38 100644
> --- a/drivers/mtd/nand/raw/cafe_nand.c
> +++ b/drivers/mtd/nand/raw/cafe_nand.c
> @@ -629,7 +629,8 @@ static int cafe_nand_attach_chip(struct nand_chip *chip)
>                 goto out_free_dma;
>         }
>
> -       cafe->nand.ecc.mode = NAND_ECC_HW_SYNDROME;
> +       cafe->nand.ecc.mode = NAND_ECC_HW;
> +       cafe->nand.ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
>         cafe->nand.ecc.size = mtd->writesize;
>         cafe->nand.ecc.bytes = 14;
>         cafe->nand.ecc.strength = 4;
> diff --git a/drivers/mtd/nand/raw/davinci_nand.c b/drivers/mtd/nand/raw/davinci_nand.c
> index 551515c223bb..3640c7e45e15 100644
> --- a/drivers/mtd/nand/raw/davinci_nand.c
> +++ b/drivers/mtd/nand/raw/davinci_nand.c
> @@ -168,7 +168,7 @@ static int nand_davinci_correct_1bit(struct nand_chip *chip, u_char *dat,
>  /*
>   * 4-bit hardware ECC ... context maintained over entire AEMIF
>   *
> - * This is a syndrome engine, but we avoid NAND_ECC_HW_SYNDROME
> + * This is a syndrome engine, but we avoid NAND_ECC_PLACEMENT_INTERLEAVED
>   * since that forces use of a problematic "infix OOB" layout.
>   * Among other things, it trashes manufacturer bad block markers.
>   * Also, and specific to this hardware, it ECC-protects the "prepad"
> @@ -851,6 +851,7 @@ static int nand_davinci_probe(struct platform_device *pdev)
>
>         /* Use board-specific ECC config */
>         info->chip.ecc.mode     = pdata->ecc_mode;
> +       info->chip.ecc.placement = pdata->ecc_placement;
>
>         spin_lock_irq(&davinci_nand_lock);
>
> @@ -897,7 +898,7 @@ static int nand_davinci_remove(struct platform_device *pdev)
>         int ret;
>
>         spin_lock_irq(&davinci_nand_lock);
> -       if (info->chip.ecc.mode == NAND_ECC_HW_SYNDROME)
> +       if (info->chip.ecc.placement == NAND_ECC_PLACEMENT_INTERLEAVED)
>                 ecc4_busy = false;
>         spin_unlock_irq(&davinci_nand_lock);
>
> diff --git a/drivers/mtd/nand/raw/denali.c b/drivers/mtd/nand/raw/denali.c
> index 9d99dade95ce..0e54b8a61cf0 100644
> --- a/drivers/mtd/nand/raw/denali.c
> +++ b/drivers/mtd/nand/raw/denali.c
> @@ -1237,7 +1237,8 @@ int denali_chip_init(struct denali_controller *denali,
>         chip->bbt_options |= NAND_BBT_USE_FLASH;
>         chip->bbt_options |= NAND_BBT_NO_OOB;
>         chip->options |= NAND_NO_SUBPAGE_WRITE;
> -       chip->ecc.mode = NAND_ECC_HW_SYNDROME;
> +       chip->ecc.mode = NAND_ECC_HW;
> +       chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
>         chip->ecc.read_page = denali_read_page;
>         chip->ecc.write_page = denali_write_page;
>         chip->ecc.read_page_raw = denali_read_page_raw;
> diff --git a/drivers/mtd/nand/raw/diskonchip.c b/drivers/mtd/nand/raw/diskonchip.c
> index 43721863a0d8..40360352136b 100644
> --- a/drivers/mtd/nand/raw/diskonchip.c
> +++ b/drivers/mtd/nand/raw/diskonchip.c
> @@ -1456,7 +1456,8 @@ static int __init doc_probe(unsigned long physadr)
>         nand->ecc.calculate     = doc200x_calculate_ecc;
>         nand->ecc.correct       = doc200x_correct_data;
>
> -       nand->ecc.mode          = NAND_ECC_HW_SYNDROME;
> +       nand->ecc.mode          = NAND_ECC_HW;
> +       nand->ecc.placement     = NAND_ECC_PLACEMENT_INTERLEAVED;
>         nand->ecc.size          = 512;
>         nand->ecc.bytes         = 6;
>         nand->ecc.strength      = 2;
> diff --git a/drivers/mtd/nand/raw/lpc32xx_slc.c b/drivers/mtd/nand/raw/lpc32xx_slc.c
> index b151fd000815..ccb189c8e343 100644
> --- a/drivers/mtd/nand/raw/lpc32xx_slc.c
> +++ b/drivers/mtd/nand/raw/lpc32xx_slc.c
> @@ -881,7 +881,8 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
>         platform_set_drvdata(pdev, host);
>
>         /* NAND callbacks for LPC32xx SLC hardware */
> -       chip->ecc.mode = NAND_ECC_HW_SYNDROME;
> +       chip->ecc.mode = NAND_ECC_HW;
> +       chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
>         chip->legacy.read_byte = lpc32xx_nand_read_byte;
>         chip->legacy.read_buf = lpc32xx_nand_read_buf;
>         chip->legacy.write_buf = lpc32xx_nand_write_buf;
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 1d403b439850..5e1f4c1faec0 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -5795,61 +5795,74 @@ static int nand_scan_tail(struct nand_chip *chip)
>
>         switch (ecc->mode) {
>         case NAND_ECC_HW:
> -               /* Use standard hwecc read page function? */
> -               if (!ecc->read_page)
> -                       ecc->read_page = nand_read_page_hwecc;
> -               if (!ecc->write_page)
> -                       ecc->write_page = nand_write_page_hwecc;
> -               if (!ecc->read_page_raw)
> -                       ecc->read_page_raw = nand_read_page_raw;
> -               if (!ecc->write_page_raw)
> -                       ecc->write_page_raw = nand_write_page_raw;
> -               if (!ecc->read_oob)
> -                       ecc->read_oob = nand_read_oob_std;
> -               if (!ecc->write_oob)
> -                       ecc->write_oob = nand_write_oob_std;
> -               if (!ecc->read_subpage)
> -                       ecc->read_subpage = nand_read_subpage;
> -               if (!ecc->write_subpage && ecc->hwctl && ecc->calculate)
> -                       ecc->write_subpage = nand_write_subpage_hwecc;
> -               fallthrough;
> -       case NAND_ECC_HW_SYNDROME:
> -               if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
> -                   (!ecc->read_page ||
> -                    ecc->read_page == nand_read_page_hwecc ||
> -                    !ecc->write_page ||
> -                    ecc->write_page == nand_write_page_hwecc)) {
> -                       WARN(1, "No ECC functions supplied; hardware ECC not possible\n");
> -                       ret = -EINVAL;
> -                       goto err_nand_manuf_cleanup;
> -               }
> -               /* Use standard syndrome read/write page function? */
> -               if (!ecc->read_page)
> -                       ecc->read_page = nand_read_page_syndrome;
> -               if (!ecc->write_page)
> -                       ecc->write_page = nand_write_page_syndrome;
> -               if (!ecc->read_page_raw)
> -                       ecc->read_page_raw = nand_read_page_raw_syndrome;
> -               if (!ecc->write_page_raw)
> -                       ecc->write_page_raw = nand_write_page_raw_syndrome;
> -               if (!ecc->read_oob)
> -                       ecc->read_oob = nand_read_oob_syndrome;
> -               if (!ecc->write_oob)
> -                       ecc->write_oob = nand_write_oob_syndrome;
> +               switch (ecc->placement) {
> +               case NAND_ECC_PLACEMENT_UNKNOWN:
> +               case NAND_ECC_PLACEMENT_OOB:
> +                       /* Use standard hwecc read page function? */
> +                       if (!ecc->read_page)
> +                               ecc->read_page = nand_read_page_hwecc;
> +                       if (!ecc->write_page)
> +                               ecc->write_page = nand_write_page_hwecc;
> +                       if (!ecc->read_page_raw)
> +                               ecc->read_page_raw = nand_read_page_raw;
> +                       if (!ecc->write_page_raw)
> +                               ecc->write_page_raw = nand_write_page_raw;
> +                       if (!ecc->read_oob)
> +                               ecc->read_oob = nand_read_oob_std;
> +                       if (!ecc->write_oob)
> +                               ecc->write_oob = nand_write_oob_std;
> +                       if (!ecc->read_subpage)
> +                               ecc->read_subpage = nand_read_subpage;
> +                       if (!ecc->write_subpage && ecc->hwctl && ecc->calculate)
> +                               ecc->write_subpage = nand_write_subpage_hwecc;
> +                       fallthrough;
>
> -               if (mtd->writesize >= ecc->size) {
> -                       if (!ecc->strength) {
> -                               WARN(1, "Driver must set ecc.strength when using hardware ECC\n");
> +               case NAND_ECC_PLACEMENT_INTERLEAVED:
> +                       if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
> +                           (!ecc->read_page ||
> +                            ecc->read_page == nand_read_page_hwecc ||
> +                            !ecc->write_page ||
> +                            ecc->write_page == nand_write_page_hwecc)) {
> +                               WARN(1, "No ECC functions supplied; hardware ECC not possible\n");
>                                 ret = -EINVAL;
>                                 goto err_nand_manuf_cleanup;
>                         }
> +                       /* Use standard syndrome read/write page function? */
> +                       if (!ecc->read_page)
> +                               ecc->read_page = nand_read_page_syndrome;
> +                       if (!ecc->write_page)
> +                               ecc->write_page = nand_write_page_syndrome;
> +                       if (!ecc->read_page_raw)
> +                               ecc->read_page_raw = nand_read_page_raw_syndrome;
> +                       if (!ecc->write_page_raw)
> +                               ecc->write_page_raw = nand_write_page_raw_syndrome;
> +                       if (!ecc->read_oob)
> +                               ecc->read_oob = nand_read_oob_syndrome;
> +                       if (!ecc->write_oob)
> +                               ecc->write_oob = nand_write_oob_syndrome;
> +
> +                       if (mtd->writesize >= ecc->size) {
> +                               if (!ecc->strength) {
> +                                       WARN(1, "Driver must set ecc.strength when using hardware ECC\n");
> +                                       ret = -EINVAL;
> +                                       goto err_nand_manuf_cleanup;
> +                               }
> +                               break;

Hi Miquel, the changes to the nested switch statement make the logic
of this break wrong.

> +                       }
> +                       pr_warn("%d byte HW ECC not possible on %d byte page size, fallback to SW ECC\n",
> +                               ecc->size, mtd->writesize);
> +                       ecc->mode = NAND_ECC_SOFT;
> +                       ecc->algo = NAND_ECC_ALGO_HAMMING;
>                         break;
> +
> +               default:
> +                       pr_warn("Invalid NAND_ECC_PLACEMENT %d\n",
> +                               ecc->placement);
> +                       ret = -EINVAL;
> +                       goto err_nand_manuf_cleanup;
>                 }
> -               pr_warn("%d byte HW ECC not possible on %d byte page size, fallback to SW ECC\n",
> -                       ecc->size, mtd->writesize);
> -               ecc->mode = NAND_ECC_SOFT;
> -               ecc->algo = NAND_ECC_ALGO_HAMMING;
>                 fallthrough;
> +
>         case NAND_ECC_SOFT:
>                 ret = nand_set_ecc_soft_ops(chip);
>                 if (ret) {
> diff --git a/drivers/mtd/nand/raw/r852.c b/drivers/mtd/nand/raw/r852.c
> index f865e3a47b01..f0988cda4479 100644
> --- a/drivers/mtd/nand/raw/r852.c
> +++ b/drivers/mtd/nand/raw/r852.c
> @@ -859,7 +859,8 @@ static int  r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
>         chip->legacy.write_buf = r852_write_buf;
>
>         /* ecc */
> -       chip->ecc.mode = NAND_ECC_HW_SYNDROME;
> +       chip->ecc.mode = NAND_ECC_HW;
> +       chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED;
>         chip->ecc.size = R852_DMA_LEN;
>         chip->ecc.bytes = SM_OOB_SIZE;
>         chip->ecc.strength = 2;
> diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
> index 10bbfbf4ad7f..cfd75a12f802 100644
> --- a/include/linux/mtd/rawnand.h
> +++ b/include/linux/mtd/rawnand.h
> @@ -304,6 +304,7 @@ static const struct nand_ecc_caps __name = {                        \
>  /**
>   * struct nand_ecc_ctrl - Control structure for ECC
>   * @mode:      ECC mode
> + * @placement: OOB bytes placement
>   * @algo:      ECC algorithm
>   * @steps:     number of ECC steps per page
>   * @size:      data bytes per ECC step
> @@ -331,7 +332,7 @@ static const struct nand_ecc_caps __name = {                        \
>   *                     controller and always return contiguous in-band and
>   *                     out-of-band data even if they're not stored
>   *                     contiguously on the NAND chip (e.g.
> - *                     NAND_ECC_HW_SYNDROME interleaves in-band and
> + *                     NAND_ECC_PLACEMENT_INTERLEAVED interleaves in-band and
>   *                     out-of-band data).
>   * @write_page_raw:    function to write a raw page without ECC. This function
>   *                     should hide the specific layout used by the ECC
> @@ -339,7 +340,7 @@ static const struct nand_ecc_caps __name = {                        \
>   *                     in-band and out-of-band data. ECC controller is
>   *                     responsible for doing the appropriate transformations
>   *                     to adapt to its specific layout (e.g.
> - *                     NAND_ECC_HW_SYNDROME interleaves in-band and
> + *                     NAND_ECC_PLACEMENT_INTERLEAVED interleaves in-band and
>   *                     out-of-band data).
>   * @read_page: function to read a page according to the ECC generator
>   *             requirements; returns maximum number of bitflips corrected in
> @@ -356,6 +357,7 @@ static const struct nand_ecc_caps __name = {                        \
>   */
>  struct nand_ecc_ctrl {
>         enum nand_ecc_mode mode;
> +       enum nand_ecc_placement placement;
>         enum nand_ecc_algo algo;
>         int steps;
>         int size;
> diff --git a/include/linux/platform_data/mtd-davinci.h b/include/linux/platform_data/mtd-davinci.h
> index 03e92c71b3fa..6e2b252a4ce6 100644
> --- a/include/linux/platform_data/mtd-davinci.h
> +++ b/include/linux/platform_data/mtd-davinci.h
> @@ -69,6 +69,7 @@ struct davinci_nand_pdata {           /* platform_data */
>          * using it with large page chips.
>          */
>         enum nand_ecc_mode      ecc_mode;
> +       enum nand_ecc_placement ecc_placement;
>         u8                      ecc_bits;
>
>         /* e.g. NAND_BUSWIDTH_16 */
> --
> 2.20.1
>
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/



-- 
Sincerely,

Han XU

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-14 21:36   ` Han Xu
@ 2020-10-15  1:35     ` Fabio Estevam
  2020-10-15  3:09       ` Han Xu
  0 siblings, 1 reply; 57+ messages in thread
From: Fabio Estevam @ 2020-10-15  1:35 UTC (permalink / raw)
  To: Han Xu
  Cc: Richard Weinberger, Tudor Ambarus, linux-mtd,
	Vignesh Raghavendra, Miquel Raynal

Hi Han Xu,

On Wed, Oct 14, 2020 at 6:38 PM Han Xu <xhnjupt@gmail.com> wrote:

> Hi Miquel, the changes to the nested switch statement make the logic
> of this break wrong.

Care to send a fix, please?

We have seen ECC NAND regressions on mx27 and LS2088 platforms.

In which platform did you noticed the ECC issue?

Thanks

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-15  1:35     ` Fabio Estevam
@ 2020-10-15  3:09       ` Han Xu
  2020-10-15  7:25         ` Miquel Raynal
  0 siblings, 1 reply; 57+ messages in thread
From: Han Xu @ 2020-10-15  3:09 UTC (permalink / raw)
  To: Fabio Estevam
  Cc: Richard Weinberger, Tudor Ambarus, linux-mtd,
	Vignesh Raghavendra, Miquel Raynal

On Wed, Oct 14, 2020 at 8:35 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> Hi Han Xu,
>
> On Wed, Oct 14, 2020 at 6:38 PM Han Xu <xhnjupt@gmail.com> wrote:
>
> > Hi Miquel, the changes to the nested switch statement make the logic
> > of this break wrong.
>
> Care to send a fix, please?
>
> We have seen ECC NAND regressions on mx27 and LS2088 platforms.
>
> In which platform did you noticed the ECC issue?
>
> Thanks

Hi Fabio,

CI test reported all LS platforms have the ECC regression. The error
is "Driver must set ecc.strength when using hardware ECC"

I haven't worked on any LS platforms so I tested on i.MX platforms
with gpmi NAND controller,
the code ran into NAND_ECC_ENGINE_TYPE_SOFT due to this issue. So
these are two different issues, I can send a patch to fix the nested
switch statement problem but won't fix the LS platform issue.



-- 
Sincerely,

Han XU

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-15  3:09       ` Han Xu
@ 2020-10-15  7:25         ` Miquel Raynal
  2020-10-16 17:09           ` Han Xu
  0 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-10-15  7:25 UTC (permalink / raw)
  To: Han Xu
  Cc: Richard Weinberger, Fabio Estevam, Vignesh Raghavendra,
	linux-mtd, Tudor Ambarus

Hi Han,

Han Xu <xhnjupt@gmail.com> wrote on Wed, 14 Oct 2020 22:09:56 -0500:

> On Wed, Oct 14, 2020 at 8:35 PM Fabio Estevam <festevam@gmail.com> wrote:
> >
> > Hi Han Xu,
> >
> > On Wed, Oct 14, 2020 at 6:38 PM Han Xu <xhnjupt@gmail.com> wrote:
> >  
> > > Hi Miquel, the changes to the nested switch statement make the logic
> > > of this break wrong.  
> >
> > Care to send a fix, please?
> >
> > We have seen ECC NAND regressions on mx27 and LS2088 platforms.
> >
> > In which platform did you noticed the ECC issue?
> >
> > Thanks  
> 
> Hi Fabio,
> 
> CI test reported all LS platforms have the ECC regression. The error
> is "Driver must set ecc.strength when using hardware ECC"
> 
> I haven't worked on any LS platforms so I tested on i.MX platforms
> with gpmi NAND controller,
> the code ran into NAND_ECC_ENGINE_TYPE_SOFT due to this issue. So
> these are two different issues, I can send a patch to fix the nested
> switch statement problem but won't fix the LS platform issue.


I think the fact that the execution ran into NAND_ECC_ENGINE_TYPE_SOFT
has been fixed. However there is still the other issue that I am unable
to find just by reading the code :/


Thanks,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-15  7:25         ` Miquel Raynal
@ 2020-10-16 17:09           ` Han Xu
  2020-10-16 17:14             ` Miquel Raynal
  0 siblings, 1 reply; 57+ messages in thread
From: Han Xu @ 2020-10-16 17:09 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: Richard Weinberger, Fabio Estevam, Vignesh Raghavendra,
	linux-mtd, Tudor Ambarus

On Thu, Oct 15, 2020 at 2:25 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote:
>
> Hi Han,
>
> Han Xu <xhnjupt@gmail.com> wrote on Wed, 14 Oct 2020 22:09:56 -0500:
>
> > On Wed, Oct 14, 2020 at 8:35 PM Fabio Estevam <festevam@gmail.com> wrote:
> > >
> > > Hi Han Xu,
> > >
> > > On Wed, Oct 14, 2020 at 6:38 PM Han Xu <xhnjupt@gmail.com> wrote:
> > >
> > > > Hi Miquel, the changes to the nested switch statement make the logic
> > > > of this break wrong.
> > >
> > > Care to send a fix, please?
> > >
> > > We have seen ECC NAND regressions on mx27 and LS2088 platforms.
> > >
> > > In which platform did you noticed the ECC issue?
> > >
> > > Thanks
> >
> > Hi Fabio,
> >
> > CI test reported all LS platforms have the ECC regression. The error
> > is "Driver must set ecc.strength when using hardware ECC"
> >
> > I haven't worked on any LS platforms so I tested on i.MX platforms
> > with gpmi NAND controller,
> > the code ran into NAND_ECC_ENGINE_TYPE_SOFT due to this issue. So
> > these are two different issues, I can send a patch to fix the nested
> > switch statement problem but won't fix the LS platform issue.
>
>
> I think the fact that the execution ran into NAND_ECC_ENGINE_TYPE_SOFT
> has been fixed. However there is still the other issue that I am unable
> to find just by reading the code :/

Could you please send me the link of the fix patch, I can test it on
i.MX platforms.

>
>
> Thanks,
> Miquèl



-- 
Sincerely,

Han XU

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-16 17:09           ` Han Xu
@ 2020-10-16 17:14             ` Miquel Raynal
  2020-10-16 17:51               ` Han Xu
  0 siblings, 1 reply; 57+ messages in thread
From: Miquel Raynal @ 2020-10-16 17:14 UTC (permalink / raw)
  To: Han Xu
  Cc: Richard Weinberger, Fabio Estevam, Vignesh Raghavendra,
	linux-mtd, Tudor Ambarus

Hi Han,

Han Xu <xhnjupt@gmail.com> wrote on Fri, 16 Oct 2020 12:09:22 -0500:

> On Thu, Oct 15, 2020 at 2:25 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> >
> > Hi Han,
> >
> > Han Xu <xhnjupt@gmail.com> wrote on Wed, 14 Oct 2020 22:09:56 -0500:
> >  
> > > On Wed, Oct 14, 2020 at 8:35 PM Fabio Estevam <festevam@gmail.com> wrote:  
> > > >
> > > > Hi Han Xu,
> > > >
> > > > On Wed, Oct 14, 2020 at 6:38 PM Han Xu <xhnjupt@gmail.com> wrote:
> > > >  
> > > > > Hi Miquel, the changes to the nested switch statement make the logic
> > > > > of this break wrong.  
> > > >
> > > > Care to send a fix, please?
> > > >
> > > > We have seen ECC NAND regressions on mx27 and LS2088 platforms.
> > > >
> > > > In which platform did you noticed the ECC issue?
> > > >
> > > > Thanks  
> > >
> > > Hi Fabio,
> > >
> > > CI test reported all LS platforms have the ECC regression. The error
> > > is "Driver must set ecc.strength when using hardware ECC"
> > >
> > > I haven't worked on any LS platforms so I tested on i.MX platforms
> > > with gpmi NAND controller,
> > > the code ran into NAND_ECC_ENGINE_TYPE_SOFT due to this issue. So
> > > these are two different issues, I can send a patch to fix the nested
> > > switch statement problem but won't fix the LS platform issue.  
> >
> >
> > I think the fact that the execution ran into NAND_ECC_ENGINE_TYPE_SOFT
> > has been fixed. However there is still the other issue that I am unable
> > to find just by reading the code :/  
> 
> Could you please send me the link of the fix patch, I can test it on
> i.MX platforms.

The fix is in next since more than a week, if you still have the issue
then it's probably the same issue that sascha reported in another
thread and in this case debugging from your side is welcome.

Thanks,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-16 17:14             ` Miquel Raynal
@ 2020-10-16 17:51               ` Han Xu
  2020-10-16 18:00                 ` Miquel Raynal
  2020-10-16 21:03                 ` Fabio Estevam
  0 siblings, 2 replies; 57+ messages in thread
From: Han Xu @ 2020-10-16 17:51 UTC (permalink / raw)
  To: Miquel Raynal
  Cc: Richard Weinberger, Fabio Estevam, Vignesh Raghavendra,
	linux-mtd, Tudor Ambarus

On Fri, Oct 16, 2020 at 12:14 PM Miquel Raynal
<miquel.raynal@bootlin.com> wrote:
>
> Hi Han,
>
> Han Xu <xhnjupt@gmail.com> wrote on Fri, 16 Oct 2020 12:09:22 -0500:
>
> > On Thu, Oct 15, 2020 at 2:25 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> > >
> > > Hi Han,
> > >
> > > Han Xu <xhnjupt@gmail.com> wrote on Wed, 14 Oct 2020 22:09:56 -0500:
> > >
> > > > On Wed, Oct 14, 2020 at 8:35 PM Fabio Estevam <festevam@gmail.com> wrote:
> > > > >
> > > > > Hi Han Xu,
> > > > >
> > > > > On Wed, Oct 14, 2020 at 6:38 PM Han Xu <xhnjupt@gmail.com> wrote:
> > > > >
> > > > > > Hi Miquel, the changes to the nested switch statement make the logic
> > > > > > of this break wrong.
> > > > >
> > > > > Care to send a fix, please?
> > > > >
> > > > > We have seen ECC NAND regressions on mx27 and LS2088 platforms.
> > > > >
> > > > > In which platform did you noticed the ECC issue?
> > > > >
> > > > > Thanks
> > > >
> > > > Hi Fabio,
> > > >
> > > > CI test reported all LS platforms have the ECC regression. The error
> > > > is "Driver must set ecc.strength when using hardware ECC"
> > > >
> > > > I haven't worked on any LS platforms so I tested on i.MX platforms
> > > > with gpmi NAND controller,
> > > > the code ran into NAND_ECC_ENGINE_TYPE_SOFT due to this issue. So
> > > > these are two different issues, I can send a patch to fix the nested
> > > > switch statement problem but won't fix the LS platform issue.
> > >
> > >
> > > I think the fact that the execution ran into NAND_ECC_ENGINE_TYPE_SOFT
> > > has been fixed. However there is still the other issue that I am unable
> > > to find just by reading the code :/
> >
> > Could you please send me the link of the fix patch, I can test it on
> > i.MX platforms.
>
> The fix is in next since more than a week, if you still have the issue
> then it's probably the same issue that sascha reported in another
> thread and in this case debugging from your side is welcome.

If I am correct, the patch "mtd: rawnand: Fix wrongful fallthrough
NAND_ECC_SOFT" is the fix. But I didn't see it in the next branch,
only the other two patches in the patch set applied.

>
> Thanks,
> Miquèl



-- 
Sincerely,

Han XU

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-16 17:51               ` Han Xu
@ 2020-10-16 18:00                 ` Miquel Raynal
  2020-10-16 21:03                 ` Fabio Estevam
  1 sibling, 0 replies; 57+ messages in thread
From: Miquel Raynal @ 2020-10-16 18:00 UTC (permalink / raw)
  To: Han Xu
  Cc: Richard Weinberger, Fabio Estevam, Vignesh Raghavendra,
	linux-mtd, Tudor Ambarus

Hi Han,

Han Xu <xhnjupt@gmail.com> wrote on Fri, 16 Oct 2020 12:51:24 -0500:

> On Fri, Oct 16, 2020 at 12:14 PM Miquel Raynal
> <miquel.raynal@bootlin.com> wrote:
> >
> > Hi Han,
> >
> > Han Xu <xhnjupt@gmail.com> wrote on Fri, 16 Oct 2020 12:09:22 -0500:
> >  
> > > On Thu, Oct 15, 2020 at 2:25 AM Miquel Raynal <miquel.raynal@bootlin.com> wrote:  
> > > >
> > > > Hi Han,
> > > >
> > > > Han Xu <xhnjupt@gmail.com> wrote on Wed, 14 Oct 2020 22:09:56 -0500:
> > > >  
> > > > > On Wed, Oct 14, 2020 at 8:35 PM Fabio Estevam <festevam@gmail.com> wrote:  
> > > > > >
> > > > > > Hi Han Xu,
> > > > > >
> > > > > > On Wed, Oct 14, 2020 at 6:38 PM Han Xu <xhnjupt@gmail.com> wrote:
> > > > > >  
> > > > > > > Hi Miquel, the changes to the nested switch statement make the logic
> > > > > > > of this break wrong.  
> > > > > >
> > > > > > Care to send a fix, please?
> > > > > >
> > > > > > We have seen ECC NAND regressions on mx27 and LS2088 platforms.
> > > > > >
> > > > > > In which platform did you noticed the ECC issue?
> > > > > >
> > > > > > Thanks  
> > > > >
> > > > > Hi Fabio,
> > > > >
> > > > > CI test reported all LS platforms have the ECC regression. The error
> > > > > is "Driver must set ecc.strength when using hardware ECC"
> > > > >
> > > > > I haven't worked on any LS platforms so I tested on i.MX platforms
> > > > > with gpmi NAND controller,
> > > > > the code ran into NAND_ECC_ENGINE_TYPE_SOFT due to this issue. So
> > > > > these are two different issues, I can send a patch to fix the nested
> > > > > switch statement problem but won't fix the LS platform issue.  
> > > >
> > > >
> > > > I think the fact that the execution ran into NAND_ECC_ENGINE_TYPE_SOFT
> > > > has been fixed. However there is still the other issue that I am unable
> > > > to find just by reading the code :/  
> > >
> > > Could you please send me the link of the fix patch, I can test it on
> > > i.MX platforms.  
> >
> > The fix is in next since more than a week, if you still have the issue
> > then it's probably the same issue that sascha reported in another
> > thread and in this case debugging from your side is welcome.  
> 
> If I am correct, the patch "mtd: rawnand: Fix wrongful fallthrough
> NAND_ECC_SOFT" is the fix. But I didn't see it in the next branch,
> only the other two patches in the patch set applied.

Indeed, I squashed that patch with the faulty commit to try keeping a
clean/understandable history.


Thanks,
Miquèl

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-16 17:51               ` Han Xu
  2020-10-16 18:00                 ` Miquel Raynal
@ 2020-10-16 21:03                 ` Fabio Estevam
  2020-10-19 15:51                   ` Han Xu
  1 sibling, 1 reply; 57+ messages in thread
From: Fabio Estevam @ 2020-10-16 21:03 UTC (permalink / raw)
  To: Han Xu
  Cc: Richard Weinberger, Tudor Ambarus, linux-mtd,
	Vignesh Raghavendra, Miquel Raynal

Hi Han Xu,

On Fri, Oct 16, 2020 at 2:51 PM Han Xu <xhnjupt@gmail.com> wrote:

> If I am correct, the patch "mtd: rawnand: Fix wrongful fallthrough
> NAND_ECC_SOFT" is the fix. But I didn't see it in the next branch,
> only the other two patches in the patch set applied.

Could you please try the patch below against today's linux-next?
http://lists.infradead.org/pipermail/linux-mtd/2020-October/083123.html

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-16 21:03                 ` Fabio Estevam
@ 2020-10-19 15:51                   ` Han Xu
  2020-10-19 16:52                     ` Fabio Estevam
  0 siblings, 1 reply; 57+ messages in thread
From: Han Xu @ 2020-10-19 15:51 UTC (permalink / raw)
  To: Fabio Estevam
  Cc: Richard Weinberger, Tudor Ambarus, linux-mtd,
	Vignesh Raghavendra, Miquel Raynal

On Fri, Oct 16, 2020 at 4:04 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> Hi Han Xu,
>
> On Fri, Oct 16, 2020 at 2:51 PM Han Xu <xhnjupt@gmail.com> wrote:
>
> > If I am correct, the patch "mtd: rawnand: Fix wrongful fallthrough
> > NAND_ECC_SOFT" is the fix. But I didn't see it in the next branch,
> > only the other two patches in the patch set applied.
>
> Could you please try the patch below against today's linux-next?
> http://lists.infradead.org/pipermail/linux-mtd/2020-October/083123.html

Tested on ls1043ardb board, the issue can be fixed. Thanks.

-- 
Sincerely,

Han XU

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^ permalink raw reply	[flat|nested] 57+ messages in thread

* Re: [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement
  2020-10-19 15:51                   ` Han Xu
@ 2020-10-19 16:52                     ` Fabio Estevam
  0 siblings, 0 replies; 57+ messages in thread
From: Fabio Estevam @ 2020-10-19 16:52 UTC (permalink / raw)
  To: Han Xu
  Cc: Richard Weinberger, Tudor Ambarus, linux-mtd,
	Vignesh Raghavendra, Miquel Raynal

Hi Han Xu,

On Mon, Oct 19, 2020 at 12:51 PM Han Xu <xhnjupt@gmail.com> wrote:

> Tested on ls1043ardb board, the issue can be fixed. Thanks.

Thanks for testing.

Please reply with your Tested-by in the original patch.

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http://lists.infradead.org/mailman/listinfo/linux-mtd/

^ permalink raw reply	[flat|nested] 57+ messages in thread

end of thread, back to index

Thread overview: 57+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-27  8:51 [PATCH v13 00/20] Introduction of the generic ECC framework Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 01/20] mtd: rawnand: Add a kernel doc to the ECC algorithm enumeration Miquel Raynal
2020-09-07  7:25   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 02/20] mtd: rawnand: Rename the ECC algorithm enumeration items Miquel Raynal
2020-09-07  7:25   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 03/20] mtd: rawnand: Move the nand_ecc_algo enum to the generic NAND layer Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 04/20] mtd: nand: Add a NAND page I/O request type Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 05/20] dt-bindings: mtd: Document nand-ecc-placement Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 06/20] dt-bindings: mtd: Document nand-ecc-engine Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 07/20] dt-bindings: mtd: Document boolean NAND ECC properties Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 08/20] mtd: nand: Introduce the ECC engine framework Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 09/20] mtd: rawnand: Separate the ECC engine type and the ECC byte placement Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-10-14 21:36   ` Han Xu
2020-10-15  1:35     ` Fabio Estevam
2020-10-15  3:09       ` Han Xu
2020-10-15  7:25         ` Miquel Raynal
2020-10-16 17:09           ` Han Xu
2020-10-16 17:14             ` Miquel Raynal
2020-10-16 17:51               ` Han Xu
2020-10-16 18:00                 ` Miquel Raynal
2020-10-16 21:03                 ` Fabio Estevam
2020-10-19 15:51                   ` Han Xu
2020-10-19 16:52                     ` Fabio Estevam
2020-08-27  8:51 ` [PATCH v13 10/20] mtd: rawnand: Use the new ECC engine type enumeration Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:51 ` [PATCH v13 11/20] mtd: nand: Create a helper to extract the ECC configuration Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:52 ` [PATCH v13 12/20] mtd: spinand: Use nanddev_get_ecc_conf() when relevant Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:52 ` [PATCH v13 13/20] mtd: nand: Create helpers to set/extract the ECC requirements Miquel Raynal
2020-09-07  7:24   ` Miquel Raynal
2020-08-27  8:52 ` [PATCH v13 14/20] mtd: rawnand: Use nanddev_get/set_ecc_requirements() when relevant Miquel Raynal
2020-09-07  7:23   ` Miquel Raynal
2020-08-27  8:52 ` [PATCH v13 15/20] mtd: nand: Use the new generic ECC object Miquel Raynal
2020-09-07  7:23   ` Miquel Raynal
2020-08-27  8:52 ` [PATCH v13 16/20] mtd: rawnand: Make use of the ECC framework Miquel Raynal
2020-09-07  7:23   ` Miquel Raynal
2020-08-27  8:52 ` [PATCH v13 17/20] mtd: rawnand: Use the ECC framework OOB layouts Miquel Raynal
2020-09-07  7:23   ` Miquel Raynal
2020-09-20 12:21   ` Janusz Krzysztofik
2020-09-29  8:15     ` Miquel Raynal
2020-09-29 21:26       ` Janusz Krzysztofik
2020-08-27  8:52 ` [PATCH v13 18/20] mtd: rawnand: Use the ECC framework nand_ecc_is_strong_enough() helper Miquel Raynal
2020-09-07  7:23   ` Miquel Raynal
2020-08-27  8:52 ` [PATCH v13 19/20] mtd: rawnand: Use the ECC framework user input parsing bits Miquel Raynal
2020-09-07  7:23   ` Miquel Raynal
2020-09-21  9:36   ` Sascha Hauer
2020-09-28 15:18     ` Miquel Raynal
2020-08-27  8:52 ` [PATCH v13 20/20] mtd: rawnand: Use the NAND framework user_conf object for ECC flags Miquel Raynal
2020-09-07  7:23   ` Miquel Raynal

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