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amd-apml.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Copyright (C) 2021-2024 Advanced Micro Devices, Inc. */ #ifndef _AMD_APML_H_ #define _AMD_APML_H_ #include <linux/types.h> /* Mailbox data size for data_in and data_out */ #define AMD_SBI_MB_DATA_SIZE 4 struct apml_mbox_msg { /* * Mailbox Message ID */ __u32 cmd; /* * [0]...[3] mailbox 32bit input/output data */ __u32 mb_in_out; /* * Error code is returned in case of soft mailbox error */ __u32 fw_ret_code; }; struct apml_cpuid_msg { /* * CPUID input * [0]...[3] cpuid func, * [4][5] cpuid: thread * [6] cpuid: ext function & read eax/ebx or ecx/edx * [7:0] -> bits [7:4] -> ext function & * bit [0] read eax/ebx or ecx/edx * CPUID output */ __u64 cpu_in_out; /* * Status code for CPUID read */ __u32 fw_ret_code; __u32 pad; }; struct apml_mcamsr_msg { /* * MCAMSR input * [0]...[3] mca msr func, * [4][5] thread * MCAMSR output */ __u64 mcamsr_in_out; /* * Status code for MCA/MSR access */ __u32 fw_ret_code; __u32 pad; }; struct apml_reg_xfer_msg { /* * RMI register address offset */ __u16 reg_addr; /* * Register data for read/write */ __u8 data_in_out; /* * Register read or write */ __u8 rflag; }; /* * AMD sideband interface base IOCTL */ #define SB_BASE_IOCTL_NR 0xF9 /** * DOC: SBRMI_IOCTL_MBOX_CMD * * @Parameters * * @struct apml_mbox_msg * Pointer to the &struct apml_mbox_msg that will contain the protocol * information * * @Description * IOCTL command for APML messages using generic _IOWR * The IOCTL provides userspace access to AMD sideband mailbox protocol * - Mailbox message read/write(0x0~0xFF) * - returning "-EFAULT" if none of the above * "-EPROTOTYPE" error is returned to provide additional error details */ #define SBRMI_IOCTL_MBOX_CMD _IOWR(SB_BASE_IOCTL_NR, 0, struct apml_mbox_msg) /** * DOC: SBRMI_IOCTL_CPUID_CMD * * @Parameters * * @struct apml_cpuid_msg * Pointer to the &struct apml_cpuid_msg that will contain the protocol * information * * @Description * IOCTL command for APML messages using generic _IOWR * The IOCTL provides userspace access to AMD sideband cpuid protocol * - CPUID protocol to get CPU details for Function/Ext Function * at thread level * - returning "-EFAULT" if none of the above * "-EPROTOTYPE" error is returned to provide additional error details */ #define SBRMI_IOCTL_CPUID_CMD _IOWR(SB_BASE_IOCTL_NR, 1, struct apml_cpuid_msg) /** * DOC: SBRMI_IOCTL_MCAMSR_CMD * * @Parameters * * @struct apml_mcamsr_msg * Pointer to the &struct apml_mcamsr_msg that will contain the protocol * information * * @Description * IOCTL command for APML messages using generic _IOWR * The IOCTL provides userspace access to AMD sideband MCAMSR protocol * - MCAMSR protocol to get MCA bank details for Function at thread level * - returning "-EFAULT" if none of the above * "-EPROTOTYPE" error is returned to provide additional error details */ #define SBRMI_IOCTL_MCAMSR_CMD _IOWR(SB_BASE_IOCTL_NR, 2, struct apml_mcamsr_msg) /** * DOC: SBRMI_IOCTL_REG_XFER_CMD * * @Parameters * * @struct apml_reg_xfer_msg * Pointer to the &struct apml_reg_xfer_msg that will contain the protocol * information * * @Description * IOCTL command for APML messages using generic _IOWR * The IOCTL provides userspace access to AMD sideband register xfer protocol * - Register xfer protocol to get/set hardware register for given offset */ #define SBRMI_IOCTL_REG_XFER_CMD _IOWR(SB_BASE_IOCTL_NR, 3, struct apml_reg_xfer_msg) #endif /*_AMD_APML_H_*/