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