From 0d7cd8550d30906c7461ced654306da30f1590e2 Mon Sep 17 00:00:00 2001 From: Jeremy Kerr Date: Thu, 4 Jun 2015 21:51:47 +0800 Subject: powerpc/powernv: Add opal-prd channel This change adds a char device to access the "PRD" (processor runtime diagnostics) channel to OPAL firmware. Includes contributions from Vaidyanathan Srinivasan, Neelesh Gupta & Vishal Kulkarni. Signed-off-by: Neelesh Gupta Signed-off-by: Jeremy Kerr Acked-by: Stewart Smith Signed-off-by: Michael Ellerman --- arch/powerpc/include/uapi/asm/opal-prd.h | 58 ++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 arch/powerpc/include/uapi/asm/opal-prd.h (limited to 'arch/powerpc/include/uapi') diff --git a/arch/powerpc/include/uapi/asm/opal-prd.h b/arch/powerpc/include/uapi/asm/opal-prd.h new file mode 100644 index 0000000..319ff4a --- /dev/null +++ b/arch/powerpc/include/uapi/asm/opal-prd.h @@ -0,0 +1,58 @@ +/* + * OPAL Runtime Diagnostics interface driver + * Supported on POWERNV platform + * + * (C) Copyright IBM 2015 + * + * Author: Vaidyanathan Srinivasan + * Author: Jeremy Kerr + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _UAPI_ASM_POWERPC_OPAL_PRD_H_ +#define _UAPI_ASM_POWERPC_OPAL_PRD_H_ + +#include + +/** + * The version of the kernel interface of the PRD system. This describes the + * interface available for the /dev/opal-prd device. The actual PRD message + * layout and content is private to the firmware <--> userspace interface, so + * is not covered by this versioning. + * + * Future interface versions are backwards-compatible; if a later kernel + * version is encountered, functionality provided in earlier versions + * will work. + */ +#define OPAL_PRD_KERNEL_VERSION 1 + +#define OPAL_PRD_GET_INFO _IOR('o', 0x01, struct opal_prd_info) +#define OPAL_PRD_SCOM_READ _IOR('o', 0x02, struct opal_prd_scom) +#define OPAL_PRD_SCOM_WRITE _IOW('o', 0x03, struct opal_prd_scom) + +#ifndef __ASSEMBLY__ + +struct opal_prd_info { + __u64 version; + __u64 reserved[3]; +}; + +struct opal_prd_scom { + __u64 chip; + __u64 addr; + __u64 data; + __s64 rc; +}; + +#endif /* __ASSEMBLY__ */ + +#endif /* _UAPI_ASM_POWERPC_OPAL_PRD_H */ -- cgit v1.1