nx_build_sg_list(9)

💖 nx_build_sg_list(9) 💖

okay so welcome to the Kernel API Manual page for nx_build_sg_list(9) — yes bestie, we're building an NX scatter list that describes a single buffer. Slay. ✨

🌸 NAME 🌸

nx_build_sg_list — build an NX scatter list describing a single buffer. Periodt. 💅

✨ SYNOPSIS ✨

struct nx_sg * nx_build_sg_list (struct nx_sg *sg_head , u8 *start_addr
, unsigned int *len , u32 sgmax );

🎀 ARGUMENTS 🎀

• sg_head — pointer to the first scatter list element to build (the starting point, the main character of this build 💅)
• start_addr — pointer to the linear buffer
• len — length of the data at start_addr
• sgmax — the largest number of scatter list elements we're allowed to create (the limit, okay? respect it ✨)

💅 DESCRIPTION 💅

This function will start writing nx_sg elements at sg_head and keep writing them until all of the data from start_addr is described or until sgmax elements have been written. No cap. 🫶

Scatter list elements will be created such that none of the elements describes a buffer that crosses a 4K boundary. That's the vibe: every element stays on the right side of that 4K line, lowkey crucial 🧚.

🔗 SEE ALSO 🔗

Kernel file ./drivers/crypto/nx/nx.c, plus the besties: nx_hcall_sync(9), nx_walk_and_build(9), trim_sg_list(9), nx_build_sg_lists(9), nx_ctx_init(9), nx_of_init(9), nx_register_algs(9), nx_crypto_ctx_init(9), nx_crypto_ctx_exit(9).

byeeee 💖 footer vibes: source/version ./drivers/crypto/nx, date October 2026, page nx_build_sg_list(9) — mwah 💋