STRUCT NAND_OP_DATA_INSTR(9)

✨ struct nand_op_data_instr(9) ✨

okay so bestie, welcome to the Kernel API Manual — this one's about struct nand_op_data_instr, which is literally the definition of a data instruction 💅 no cap.

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🎀 NAME 🎀

struct nand_op_data_instr — Definition of a data instruction. that's it, that's the whole vibe ✨

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🦋 SYNOPSIS 🦋

struct nand_op_data_instr {
    unsigned int len;
    union {
      void *in;
      const void *out;
    } buf;
    bool force_8bit;
 };

like, that's the whole struct. she's small but she's doing a LOT 🫶

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🌸 Members 🌸

• len — the number of data bytes to move. how many bytes are we shifting around, bestie? that number. 📦
• buf — buffer to fill. the actual destination situation.
• buf.in — buffer to fill when reading from the NAND chip 👀
• buf.out — buffer to read from when writing to the NAND chip ✍️
• force_8bit — force 8-bit access. no widening, no funny business, just 8-bit, periodt 🔥

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💜 Description 💜

okay so this is the part where you have to pay attention because it's giving "trap" energy 😭

Please note that "in" and "out" are inverted from the ONFI specification and are from the controller perspective — so a "in" is a read from the NAND chip, while a "out" is a write to the NAND chip.

like... yes. i know. it feels backwards. that's the whole point. don't @ me, @ the ONFI spec 🙈 just remember: controller's POV, always. main character energy is the controller, not the chip. iykyk 💀

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⭐ SEE ALSO ⭐

Kernel file ./include/linux/mtd/rawnand.h — and the whole friend group, fr fr:

• struct nand_parameters(9)
• struct nand_id(9)
• struct nand_ecc_step_info(9)
• struct nand_ecc_caps(9)
• struct nand_ecc_ctrl(9)
• struct nand_sdr_timings(9)
• struct nand_nvddr_timings(9)
• enum nand_interface_type(9)
• struct nand_interface_config(9)
• nand_interface_is_sdr(9)
• nand_interface_is_nvddr(9)
• nand_get_sdr_timings(9)
• nand_get_nvddr_timings(9)
• struct nand_op_cmd_instr(9)
• struct nand_op_addr_instr(9)
• struct nand_op_waitrdy_instr(9)
• enum nand_op_instr_type(9)
• struct nand_op_instr(9)
• struct nand_subop(9)
• struct nand_op_parser_addr_constraints(9)
• struct nand_op_parser_data_constraints(9)
• struct nand_op_parser_pattern_elem(9)
• struct nand_op_parser_pattern(9)
• struct nand_op_parser(9)
• struct nand_operation(9)
• struct nand_controller_ops(9)
• struct nand_controller(9)
• struct nand_legacy(9)
• struct nand_chip_ops(9)
• struct nand_manufacturer(9)
• struct nand_secure_region(9)
• struct nand_chip(9)
• nand_get_interface_config(9)
• struct nand_flash_dev(9)
• nand_opcode_8bits(9)
• nand_get_data_buf(9)

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🌈 and that's the page!! mwah 💋 this lil manual page lives in ./include/linux/mtd, dated October 2026, and it's part of the Kernel API Manual — slay, ate, no crumbs 👑✨