nx_build_sg_lists(9)

✨ NAME ✨

nx_build_sg_lists — okay so picture this: it walks the input scatterlists and builds arrays of NX scatterlists based on them 💅 like it literally strolls through your scatterlists and constructs the NX glow-up versions, no cap.

This is the Kernel API Manual page for it, bestie, and yes we're getting into it 🎀

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🌸 SYNOPSIS 🌸

int nx_build_sg_lists (struct nx_crypto_ctx *nx_ctx , const u8 *iv ,
struct scatterlist *dst , struct scatterlist *src , unsigned int *nbytes
, unsigned int offset , u8 *oiv );

Seven params, one int return, main character energy 🔥

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🦋 ARGUMENTS 🦋

• nx_ctx — the NX crypto context for the lists we're building 💖 it's giving "this is the context, the whole context, nothing but the context."
• iv — iv data, if the algorithm requires it 🙈 so like, only sometimes, okay?
• dst — destination scatterlist ✨ the place things are going.
• src — source scatterlist 🎀 the place things are coming from. iconic duo honestly.
• nbytes — length of data described in the scatterlists 📏 the actual count, and it's a pointer, so pay attention.
• offset — number of bytes to fast-forward past at the beginning of scatterlists ⏩ like skipping the intro of a song, but make it bytes.
• oiv — destination for the iv data, if the algorithm requires it 👑 the "o" is for output, the vibe is for slay.

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💜 DESCRIPTION 💜

So here's the tea: this is common code shared by all the AES algorithms 🫶 like every single one, no favorites.

It uses the crypto scatterlist walk routines to traverse input and output scatterlists, building corresponding NX scatterlists 🌈 that's the whole bit — walk in, build out, repeat, periodt.

ngl bestie it really is that simple, this one's a helper through and through 💀

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🧚 SEE ALSO 🧚

Kernel file ./drivers/crypto/nx/nx.c — plus the whole friend group, go say hi:

• nx_hcall_sync(9)
• nx_build_sg_list(9)
• nx_walk_and_build(9)
• trim_sg_list(9)
• nx_ctx_init(9)
• nx_of_init(9)
• nx_register_algs(9)
• nx_crypto_ctx_init(9)
• nx_crypto_ctx_exit(9)

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okay that's the page, mwah 💋

Signed off from ./drivers/crypto/nx, dated October 2026, page nx_build_sg_lists(9) — go build those scatterlists bestie, you got this ⭐💖