spu_ahash_tx_sg_create(9)

📦 version 7.3.1, in nixpkgs unstable

💅 spu_ahash_tx_sg_create — from your Kernel API Manual bestie

okay so this is spu_ahash_tx_sg_create(9), straight out of the Kernel API Manual, and it's lowkey the function that assembles the whole scatterlist situation for you. ✨

🎀 NAME 🎀

spu_ahash_tx_sg_create — bestie, this builds up the scatterlist of buffers</> used to send a SPU request message for an ahash request. and yes, it includes the SPU message headers and the request data. the whole package. 😌

🌸 SYNOPSIS 🌸

int spu_ahash_tx_sg_create (struct brcm_message *mssg , struct
       iproc_reqctx_s *rctx , u8 tx_frag_num , u32 spu_hdr_len , unsigned int
       hash_carry_len , unsigned int new_data_len , u32 pad_len );

like, seven whole arguments. she's thorough. 💅

✨ ARGUMENTS ✨

  • mssg — the mailbox message that's holding the transmit sg. it's giving delivery-girl energy 📬
  • rctx — the crypto request context. the vibe check for the request itself.
  • tx_frag_num — number of scatterlist elements required to construct the SPU request message. count 'em. 🔢
  • spu_hdr_len — length in bytes of the SPU message header. bytes, not vibes. 📏
  • hash_carry_len — Number of bytes of data carried over from previous req. leftovers but make it iconic 🍓
  • new_data_len — Number of bytes of new request data. the fresh stuff ✨
  • pad_len — Number of pad bytes. padding is self-care 🎀

🦋 DESCRIPTION 🦋

so the scatterlist that gets allocated here? it's freed in spu_chunk_cleanup when the request completes. and bestie, that's true whether the request is handled successfully or there is an error — no leaks, no drama, she cleans up after herself every single time. periodt. 💖

🔥 RETURN 🔥

  • 0 if successful
  • < 0 if an error

that's it, that's the whole vibe check 😭

👑 SEE ALSO 👑

Kernel file ./drivers/crypto/bcm/cipher.c:

like a whole friend group. go say hi to all of them 🫶

and that's the page!! 🧚 sign-off time: this little beauty lives in the Kernel API Manual, comes from ./drivers/crypto/bcm, and is dated October 2026. mwah, go build some scatterlists bestie 💜🌈⭐

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