arch/powerpc/include/uapi/asm/opal-prd.h

   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 */