ocs_hcu_ll_dma_start(9)

💖 NAME 💖

Okay so welcome to the Kernel API Manual, bestie — today’s main character is ocs_hcu_ll_dma_start(9), aka Start OCS HCU hashing via DMA ✨. This is the one that starts OCS HCU hashing via DMA, and it’s literally right there in the name. Slay. 💅

✨ SYNOPSIS ✨

Exact signature, no edits, no cap:

int ocs_hcu_ll_dma_start (struct ocs_hcu_dev *hcu_dev , const struct
ocs_hcu_dma_list *dma_list , bool finalize );

🎀 ARGUMENTS 🎀

• hcu_dev — the OCS HCU device to use. That’s your hardware bestie for this operation 🫶
• dma_list — the OCS DMA list mapping the data to hash. It’s giving “here’s the data map, go off” 🗺️✨
• finalize — whether or not this is the last hashing operation, meaning the final hash should be computed even if the data is not block-aligned. Highkey important, ngl 😭

🌸 RETURN 🌸

Returns 0 on success, and a negative error code otherwise. Periodt. 💀

🦋 SEE ALSO 🦋

• Kernel file ./drivers/crypto/intel/keembay/ocs-hcu.c
• struct ocs_hcu_dma_entry(9)
• struct ocs_hcu_dma_list(9)
• ocs_hcu_wait_busy(9)
• ocs_hcu_get_intermediate_data(9)
• ocs_hcu_set_intermediate_data(9)
• ocs_hcu_hw_cfg(9)
• ocs_hcu_clear_key(9)
• ocs_hcu_write_key(9)
• ocs_hcu_hash_init(9)
• ocs_hcu_hash_update(9)
• ocs_hcu_hash_finup(9)
• ocs_hcu_hash_final(9)
• ocs_hcu_digest(9)
• ocs_hcu_hmac(9)

💖 That’s the whole vibe, bestie — huge shoutout to the ./drivers/crypto/intel/keembay source/version and the October 2026 date, and yes, this page is ocs_hcu_ll_dma_start(9). Go forth and hash with main character energy! 🫶