kernel/linux.git/include/linux/mtd/nand.h, branch v5.15.209

mtd: nand: Add a helper to retrieve the number of ECC bytes per step

2021-03-11T08:37:28+00:00

This operation is very common and deserves a helper. It of course only works after the ECC engine initialization. Signed-off-by: Miquel Raynal Tested-by: Adam Ford #logicpd Torpedo Link: https://lore.kernel.org/linux-mtd/20210127203020.9574-6-miquel.raynal@bootlin.com

mtd: nand: Add a helper to retrieve the number of ECC steps

2021-03-11T08:37:28+00:00

mtd: nand: Let ECC engines advertize the exact number of steps

2021-03-11T08:37:27+00:00

This is an information that might be useful for specific uses, so export it, which might avoid having to guess the number of steps when necessary. Signed-off-by: Miquel Raynal Tested-by: Adam Ford #logicpd Torpedo Link: https://lore.kernel.org/linux-mtd/20210127203020.9574-2-miquel.raynal@bootlin.com

mtd: nand: Add helpers to manage ECC engines and configurations

2020-12-10T21:37:30+00:00

Add the logic in the NAND core to find the right ECC engine depending on the NAND chip requirements and the user desires. Right now, the choice may be made between (more will come): * software Hamming * software BCH * on-die (SPI-NAND devices only) Once the ECC engine has been found, the ECC engine must be configured. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20201001102014.20100-2-miquel.raynal@bootlin.com

mtd: nand: Let on-die ECC engines be retrieved from the NAND core

2020-12-10T21:37:30+00:00

Before making use of the ECC engines, we must retrieve them. Add the necessary boilerplate. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200930154109.3922-5-miquel.raynal@bootlin.com

mtd: nand: Let software ECC engines be retrieved from the NAND core

2020-12-10T21:37:30+00:00

Before making use of the ECC engines, we must retrieve them. Add the boilerplate for the ones already available: software engines (Hamming and BCH). Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-21-miquel.raynal@bootlin.com

mtd: nand: ecc-hamming: Create the software Hamming engine

2020-12-10T21:37:30+00:00

Let's continue introducing the generic ECC engine abstraction in the NAND subsystem by instantiating a second ECC engine: software Hamming. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-20-miquel.raynal@bootlin.com

mtd: nand: ecc-bch: Create the software BCH engine

2020-12-10T21:37:26+00:00

Let's continue introducing the generic ECC engine abstraction in the NAND subsystem by instantiating a first ECC engine: the software BCH one. While at it, make a very tidy ecc_sw_bch_init() function and move all the sanity checks and user input management in nand_ecc_sw_bch_init_ctx(). This second helper will be called from the raw RAND core. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-10-miquel.raynal@bootlin.com

mtd: nand: ecc: Add an I/O request tweaking mechanism

2020-11-30T08:27:32+00:00

Currently, BCH and Hamming engine are sharing the same tweaking/restoring I/O mechanism: they need the I/O request to fully cover the main/OOB area. Let's make this code generic as sharing the code between two drivers is already a win. Maybe other ECC engine drivers will need it too. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-2-miquel.raynal@bootlin.com

mtd: nand: Use the new generic ECC object

2020-09-28T13:59:48+00:00

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 Link: https://lore.kernel.org/linux-mtd/20200827085208.16276-16-miquel.raynal@bootlin.com