tpm_transmit_cmd(9)

🌸 tpm_transmit_cmd(9) 🌸

🌸 NAME 🌸

okay so bestie, in the Kernel API Manual this is tpm_transmit_cmd — literally the function that sends a tpm command to the device 💖✨

✨ SYNOPSIS ✨

ssize_t tpm_transmit_cmd (struct tpm_chip *chip , struct tpm_buf *buf ,
size_t min_rsp_body_length , const char *desc );

🎀 ARGUMENTS 🎀

• chip — a TPM chip to use, aka the main character device you're talking to 💅
• buf — a TPM command buffer, the payload vibe ✨
• min_rsp_body_length — the minimum expected length of response body, so don't skip this check, bestie 👀
• desc — command description used in the error message, for when things get messy 😭

🔥 RETURN 🔥

• 0 — OK, literally the good ending 💖
• -errno — a system error, no cap 😭
• TPM_RC — a TPM error, TPM-specific bestie 💀

🦋 SEE ALSO 🦋

• Kernel file ./drivers/char/tpm/tpm-interface.c — the source file bestie 🫶
• tpm_calc_ordinal_duration(9)
• tpm_transmit(9)
• tpm_is_tpm2(9)
• tpm_pcr_read(9)
• tpm_pcr_extend(9)
• tpm_get_random(9)

mwah — source/version ./drivers/char/tpm, date October 2026 💅✨🫶