1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2/* 3 * OPAL Runtime Diagnostics interface driver 4 * Supported on POWERNV platform 5 * 6 * (C) Copyright IBM 2015 7 * 8 * Author: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com> 9 * Author: Jeremy Kerr <jk@ozlabs.org> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2, or (at your option) 14 * any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 */ 21 22#ifndef _UAPI_ASM_POWERPC_OPAL_PRD_H_ 23#define _UAPI_ASM_POWERPC_OPAL_PRD_H_ 24 25#include <linux/types.h> 26 27/** 28 * The version of the kernel interface of the PRD system. This describes the 29 * interface available for the /dev/opal-prd device. The actual PRD message 30 * layout and content is private to the firmware <--> userspace interface, so 31 * is not covered by this versioning. 32 * 33 * Future interface versions are backwards-compatible; if a later kernel 34 * version is encountered, functionality provided in earlier versions 35 * will work. 36 */ 37#define OPAL_PRD_KERNEL_VERSION 1 38 39#define OPAL_PRD_GET_INFO _IOR('o', 0x01, struct opal_prd_info) 40#define OPAL_PRD_SCOM_READ _IOR('o', 0x02, struct opal_prd_scom) 41#define OPAL_PRD_SCOM_WRITE _IOW('o', 0x03, struct opal_prd_scom) 42 43#ifndef __ASSEMBLY__ 44 45struct opal_prd_info { 46 __u64 version; 47 __u64 reserved[3]; 48}; 49 50struct opal_prd_scom { 51 __u64 chip; 52 __u64 addr; 53 __u64 data; 54 __s64 rc; 55}; 56 57#endif /* __ASSEMBLY__ */ 58 59#endif /* _UAPI_ASM_POWERPC_OPAL_PRD_H */ 60