STRUCT NAND_ECC(9)

✨ struct nand_ecc(9) ✨

okay bestie, so this page is from the Kernel API Manual and it's all about struct nand_ecc, which is literally the main character of ECC info. like, it holds all the vibes for error correction on NAND chips 💅

This struct is where the kernel keeps track of how to do ECC — and honestly, it's giving "organized bestie who has her life together" energy. no cap.

📦 SYNOPSIS 📦

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;
 };

🌸 Members 🌸

so, like, here's the breakdown of every single member, no skipping bestie 💖

• defaults — these are the default values, and tbh they depend on the underlying subsystem. it's giving "factory settings" energy.
• requirements — the ECC requirements from the NAND chip's perspective, iykyk. the chip has opinions and this is where they live.
• user_conf — what the user actually desires in terms of ECC parameters. like, this is what you want. main character choices only 💅
• ctx — the ECC context for the ECC engine, and here's the tea: it's derived from the device requirements, the user_conf and the defaults. so it's like the final form that ate all the other info ✨
• ondie_engine — an On-die ECC engine reference, if any. so if there's one, it's here. if not, she's not invited to the party 🎀
• engine — the ECC engine that's actually bound. like, the one who actually showed up and is doing the work. slay.

👀 SEE ALSO 👀

if you're curious and wanna go down a rabbit hole, check out the Kernel file ./include/linux/mtd/nand.h and these structs/functions bestie:

struct nand_memory_organization(9), struct nand_row_converter(9), struct nand_pos(9), enum nand_page_io_req_type(9), struct nand_page_io_req(9), enum nand_ecc_engine_type(9), enum nand_ecc_placement(9), enum nand_ecc_algo(9), struct nand_ecc_props(9), struct nand_bbt(9), struct nand_ops(9), struct nand_ecc_context(9), struct nand_ecc_engine_ops(9), enum nand_ecc_engine_integration(9), struct nand_ecc_engine(9), struct nand_ecc_req_tweak_ctx(9), struct nand_device(9), struct nand_io_iter(9), mtd_to_nanddev(9), nanddev_to_mtd(9), nanddev_page_size(9), nanddev_per_page_oobsize(9), nanddev_pages_per_eraseblock(9), nanddev_pages_per_target(9), nanddev_eraseblocks_per_lun(9), nanddev_eraseblocks_per_target(9), nanddev_target_size(9), nanddev_neraseblocks(9), nanddev_size(9), nanddev_get_memorg(9), nanddev_get_ecc_conf(9), nanddev_get_ecc_nsteps(9), nanddev_get_ecc_bytes_per_step(9), nanddev_get_ecc_requirements(9), nanddev_set_ecc_requirements(9), nanddev_register(9), nanddev_unregister(9), nanddev_set_of_node(9), nanddev_get_of_node(9), nanddev_offs_to_pos(9), nanddev_pos_cmp(9), nanddev_pos_to_offs(9), nanddev_pos_to_row(9), nanddev_pos_next_target(9), nanddev_pos_next_lun(9), nanddev_pos_next_eraseblock(9), nanddev_pos_next_page(9), nanddev_bbt_pos_to_entry(9), nanddev_bbt_is_initialized(9).

okay that's the whole page bestie, you understood it perfectly fr fr 💜

stay sparkly — this was pulled from the kernel files in ./include/linux/mtd, last updated October 2026, and yeah, that's the struct nand_ecc(9) manual page, periodt. 🎀✨🦋