STRUCT S5P_HASH_REQCTX(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME

okay bestie, welcome to the struct s5p_hash_reqctx(9) page from the Kernel API Manual ✨ this is literally the HASH request context struct, and it's giving main-character energy fr fr. no cap, every field is here and accounted for 🫶

✨ SYNOPSIS

here's the whole struct in all its glory, copied exactly with zero edits:

struct s5p_hash_reqctx {
    struct s5p_aes_dev      *dd;
    bool op_update;
    u64 digcnt;
    u8 digest[SHA256_DIGEST_SIZE];
    unsigned int            nregs;
    u32 engine;
    struct scatterlist      *sg;
    unsigned int            sg_len;
    struct scatterlist      sgl[2];
    unsigned int            skip;
    unsigned int            total;
    bool finup;
    bool error;
    u32 bufcnt;
    u8 buffer[];
};

🫶 Members

  • dd — associated device 🫶
  • op_update — current request operation (OP_UPDATE or OP_FINAL)
  • digcnt — number of bytes processed by HW (without buffer[] ones) 👀
  • digest — digest message or IV for partial result
  • nregs — number of HW registers for digest or IV read/write
  • engine — bits for selecting type of HASH in SSS block
  • sg — sg for DMA transfer
  • sg_len — length of sg for DMA transfer
  • sgl — sg for joining buffer and req->src scatterlist
  • skip — skip offset in req->src for current op
  • total — total number of bytes for current request
  • finup — keep state for finup or final.
  • error — keep track of error.
  • bufcnt — number of bytes holded in buffer[]
  • buffer — for byte(s) from end of req->src in UPDATE op

🌈 SEE ALSO

peep the kernel file and all these iconic refs, bestie 💅

xoxo bestie 💋 source/version: ./drivers/crypto; date: October 2026; page: struct s5p_hash_reqctx(9) — mwah 💅✨

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