Commit 53fbdeeb authored by Miquel Raynal's avatar Miquel Raynal
Browse files

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



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: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-21-miquel.raynal@bootlin.com
parent 35fe1b98

drivers/mtd/nand/ecc.c

+20 −0
Original line number Diff line number Diff line
@@ -585,6 +585,26 @@ void nand_ecc_restore_req(struct nand_ecc_req_tweak_ctx *ctx, 
}

EXPORT_SYMBOL_GPL(nand_ecc_restore_req);



struct nand_ecc_engine *nand_ecc_get_sw_engine(struct nand_device *nand)

{

	unsigned int algo = nand->ecc.user_conf.algo;



	if (algo == NAND_ECC_ALGO_UNKNOWN)

		algo = nand->ecc.defaults.algo;



	switch (algo) {

	case NAND_ECC_ALGO_HAMMING:

		return nand_ecc_sw_hamming_get_engine();

	case NAND_ECC_ALGO_BCH:

		return nand_ecc_sw_bch_get_engine();

	default:

		break;

	}



	return NULL;

}

EXPORT_SYMBOL(nand_ecc_get_sw_engine);



MODULE_LICENSE("GPL");

MODULE_AUTHOR("Miquel Raynal <miquel.raynal@bootlin.com>");

MODULE_DESCRIPTION("Generic ECC engine");

include/linux/mtd/nand.h

+1 −0
Original line number Diff line number Diff line
@@ -277,6 +277,7 @@ int nand_ecc_prepare_io_req(struct nand_device *nand, 
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_engine *nand_ecc_get_sw_engine(struct nand_device *nand);



#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING)

struct nand_ecc_engine *nand_ecc_sw_hamming_get_engine(void);