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
45 struct opal_prd_info {
46 __u64 version;
47 __u64 reserved[3];
48 };
49
50 struct 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 */