ocs_aes_ccm_op(9)

ocs_aes_ccm_op(9) 💅 — Kernel API Manual

okay so bestie, welcome to the ocs_aes_ccm_op(9) page in the Kernel API Manual. We're doing a CCM operation, and it's giving highkey iconic main character energy. Lowkey obsessed. Let's get into it ✨

💖 NAME 💖

ocs_aes_ccm_op — literally performs a CCM operation. That's the whole name, no cap. 🎀

✨ SYNOPSIS ✨

okay so here's the exact signature, keep the tokens cute and untouched:

       int ocs_aes_ccm_op (struct ocs_aes_dev *aes_dev , enum ocs_cipher cipher
       , enum ocs_instruction instruction , dma_addr_t dst_dma_list ,
       dma_addr_t src_dma_list , u32 src_size , u8 *iv , dma_addr_t
       adata_dma_list , u32 adata_size , u8 *in_tag , u32 tag_size );

🌸 ARGUMENTS 🌸

Vibe check: here is every argument, and yes you need all of them bestie:

• aes_dev — the OCS AES device to use. Slay, pick your device. 💅
• cipher — the Cipher to use (AES or SM4). Both ate, no cap. 👑
• instruction — the instruction to perform (encrypt or decrypt). Choose your fighter. ⭐
• dst_dma_list — the OCS DMA list mapping output memory. That's the output mapping, iykyk. 📦
• src_dma_list — the OCS DMA list mapping input payload data. Input payload mapping, bestie. 🧚
• src_size — the amount of data mapped by src_dma_list. Yes, size matters, fr fr. 😭
• iv — the input IV vector. Not me being obsessed with an IV vector. 💜
• adata_dma_list — the OCS DMA list mapping input A-data. A-data gets its own DMA list, periodt. 🌈
• adata_size — the amount of data mapped by adata_dma_list. Matching size, matching vibe. ✨
• in_tag — input tag. The tag is right there in the name, bestie. 🏷️
• tag_size — the size (in bytes) of in_tag. Bytes, not vibes. 🍓

💡 NOTE 💡

for encrypt the tag is appended to the ciphertext (in the memory mapped by dst_dma_list). So when you're encrypting, the tag is literally getting appended to the ciphertext in the memory mapped by dst_dma_list, okay? Don't forget that part. 💀

🔥 RETURN 🔥

0 on success, negative error code otherwise. That's it. Ngl, success is 0; anything negative is giving error. 🫶

🦋 SEE ALSO 🦋

Kernel file ./drivers/crypto/intel/keembay/ocs-aes.c, plus:

• struct ocs_dma_linked_list(9)
• ocs_aes_set_key(9)
• ocs_aes_op(9)
• ocs_aes_gcm_op(9)
• ocs_create_linked_list_from_sg(9)

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xoxo bestie 💖 — source/version: ./drivers/crypto/intel/keembay, date: October 2026. That's the footer, now go slay your CCM operation. 💅