dthe_aead_prep_aad(9)

okay so bestie, this is dthe_aead_prep_aad(9) from the Kernel API Manual — a whole lil function page about prepping your AAD scatterlist, and it's giving “handle the boring bits so your DMA setup stays cute” energy ✨

✨ NAME ✨

dthe_aead_prep_aad — Prepare AAD scatterlist from input request. periodt 💅

🫶 SYNOPSIS 🫶

struct scatterlist * dthe_aead_prep_aad (struct scatterlist *sg ,
       unsigned int assoclen , u8 *pad_buf );

💅 ARGUMENTS 💅

• sg — Input scatterlist containing AAD. this is the one carrying the AAD, bestie 🎀
• assoclen — Length of AAD. yes, the actual length, not a vibe check.
• pad_buf — Buffer to hold AAD padding if needed. it's the padding backup plan 🌸

🎀 DESCRIPTION 🎀

okay so here's the tea: this creates a scatterlist containing only the AAD portion, with padding to align to AES_BLOCK_SIZE. it simplifies DMA handling by allowing AAD to be sent separately via TX-only DMA. that's the whole flex — clean AAD separation, DMA handled separately, no extra lore 💖

🔥 RETURN 🔥

Pointer to the AAD scatterlist, or ERR_PTR(error) on failure. and bestie, listen: the calling function needs to free the returned scatterlist when done. don't ghost that cleanup, fr fr 🙈

⚠️ cleanup check: the calling function needs to free the returned scatterlist when done. no cap, that's important.

🌸 SEE ALSO 🌸

• Kernel file ./drivers/crypto/ti/dthev2-aes.c
• dthe_aead_prep_crypt(9)

mwah 💋 this page is from ./drivers/crypto/ti, dated October 2026, and it's the dthe_aead_prep_aad(9) manual page — slay, go prep those AADs responsibly 🌈✨