SBRMI_IOCTL_MBOX_CMD(9)

💖 SBRMI_IOCTL_MBOX_CMD(9) 💖

okay bestie, welcome to the Kernel API Manual entry for SBRMI_IOCTL_MBOX_CMD(9) — it’s giving tiny-but-mighty APML mailbox access with main character energy. ✨

🌸 Parameters 🌸

• struct apml_mbox_msg — a pointer to the struct apml_mbox_msg that will contain the protocol information. 🫶

💫 Description 💫

This is the IOCTL command for APML messages using generic _IOWR. The IOCTL provides userspace access to the AMD sideband mailbox protocol. No cap, that’s the whole vibe. 💅

• Mailbox message read/write(0x0~0xFF) 🔥
• returning -EFAULT if none of the above — the -EPROTOTYPE error is returned to provide additional error details. 😭

🫶 SEE ALSO 🫶

• Kernel file ./include/uapi/misc/amd-apml.h 🦋
• SBRMI_IOCTL_CPUID_CMD(9)
• SBRMI_IOCTL_MCAMSR_CMD(9)
• SBRMI_IOCTL_REG_XFER_CMD(9)
• SBTSI_IOCTL_REG_XFER_CMD(9)

mwah 💋 — source/version vibes come from ./include/uapi/misc, the date is October 2026, and the entry is SBRMI_IOCTL_MBOX_CMD(9). 🎀