diff options
| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2020-09-30 01:01:05 +0200 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2020-11-30 09:27:32 +0100 |
| commit | 51e7bf4534da678da27c0f51e7ff21804fae88ca (patch) | |
| tree | a42da51c28075ade739bdc67ddc80bcdab25dd24 /include/linux/mtd | |
| parent | b65054597872ce3aefbc6a666385eabdf9e288da (diff) | |
mtd: nand: ecc: Add an I/O request tweaking mechanism
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 <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-2-miquel.raynal@bootlin.com
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/nand.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 697ea2474a7c..36e4fe08d0ea 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -279,6 +279,38 @@ int nand_ecc_finish_io_req(struct nand_device *nand, bool nand_ecc_is_strong_enough(struct nand_device *nand); /** + * struct nand_ecc_req_tweak_ctx - Help for automatically tweaking requests + * @orig_req: Pointer to the original IO request + * @nand: Related NAND device, to have access to its memory organization + * @page_buffer_size: Real size of the page buffer to use (can be set by the + * user before the tweaking mechanism initialization) + * @oob_buffer_size: Real size of the OOB buffer to use (can be set by the + * user before the tweaking mechanism initialization) + * @spare_databuf: Data bounce buffer + * @spare_oobbuf: OOB bounce buffer + * @bounce_data: Flag indicating a data bounce buffer is used + * @bounce_oob: Flag indicating an OOB bounce buffer is used + */ +struct nand_ecc_req_tweak_ctx { + struct nand_page_io_req orig_req; + struct nand_device *nand; + unsigned int page_buffer_size; + unsigned int oob_buffer_size; + void *spare_databuf; + void *spare_oobbuf; + bool bounce_data; + bool bounce_oob; +}; + +int nand_ecc_init_req_tweaking(struct nand_ecc_req_tweak_ctx *ctx, + struct nand_device *nand); +void nand_ecc_cleanup_req_tweaking(struct nand_ecc_req_tweak_ctx *ctx); +void nand_ecc_tweak_req(struct nand_ecc_req_tweak_ctx *ctx, + struct nand_page_io_req *req); +void nand_ecc_restore_req(struct nand_ecc_req_tweak_ctx *ctx, + struct nand_page_io_req *req); + +/** * struct nand_ecc - Information relative to the ECC * @defaults: Default values, depend on the underlying subsystem * @requirements: ECC requirements from the NAND chip perspective |