spu2_fmd_init(9)

✨ NAME ✨

okay so spu2_fmd_init(9) is from the Kernel API Manual, and it is literally the at-setkey-time init bestie for the fixed meta data 💅. Like, at setkey time it initializes that fixed meta data so the subsequent skcipher requests for this context are all set up and ready to slay ✨.

🎀 SYNOPSIS 🎀

int spu2_fmd_init (struct SPU2_FMD *fmd , enum spu2_cipher_type
       spu2_type , enum spu2_cipher_mode spu2_mode , u32 cipher_key_len , u32
       cipher_iv_len );

🌸 ARGUMENTS 🌸

• fmd — start of the FMD field to be written. Like, the beginning of the field, bestie 🫶.
• spu2_type — cipher algorithm, typed as enum spu2_cipher_type.
• spu2_mode — cipher mode, typed as enum spu2_cipher_mode.
• cipher_key_len — length of the cipher key, in bytes, and it’s a u32.
• cipher_iv_len — length of the cipher initialization vector, in bytes, also a u32 ✨.

💖 RETURN 💖

0 (success) 🎀. That’s the return listed, no cap — success gives you 0, periodt.

🦋 SEE ALSO 🦋

Kernel file ./drivers/crypto/bcm/spu2.c, plus all these iconic friends:

• spu2_cipher_xlate(9)
• spu2_hash_xlate(9)
• spu2_fmd_ctrl0_write(9)
• spu2_fmd_ctrl1_write(9)
• spu2_fmd_ctrl2_write(9)
• spu2_fmd_ctrl3_write(9)
• spu2_ctx_max_payload(9)
• spu2_payload_length(9)
• spu2_response_hdr_len(9)
• spu2_hash_pad_len(9)
• spu2_gcm_ccm_pad_len(9)
• spu2_assoc_resp_len(9)
• spu2_aead_ivlen(9)
• spu2_hash_type(9)
• spu2_digest_size(9)
• spu2_create_request(9)
• spu2_cipher_req_init(9)
• spu2_cipher_req_finish(9)
• spu2_request_pad(9)
• spu2_xts_tweak_in_payload(9)
• spu2_tx_status_len(9)
• spu2_rx_status_len(9)
• spu2_status_process(9)
• spu2_ccm_update_iv(9)
• spu2_wordalign_padlen(9)

that’s the whole vibe 💜 — from ./drivers/crypto/bcm, dated October 2026, mwah 💋🌸