Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755444AbaJHJBT (ORCPT ); Wed, 8 Oct 2014 05:01:19 -0400 Received: from ozlabs.org ([103.22.144.67]:56966 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755125AbaJHIze (ORCPT ); Wed, 8 Oct 2014 04:55:34 -0400 From: Michael Neuling To: greg@kroah.com, arnd@arndb.de, mpe@ellerman.id.au, benh@kernel.crashing.org Cc: mikey@neuling.org, anton@samba.org, linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, jk@ozlabs.org, imunsie@au.ibm.com, cbe-oss-dev@lists.ozlabs.org, "Aneesh Kumar K.V" Subject: [PATCH v4 14/16] cxl: Add userspace header file Date: Wed, 8 Oct 2014 19:55:03 +1100 Message-Id: <1412758505-23495-15-git-send-email-mikey@neuling.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1412758505-23495-1-git-send-email-mikey@neuling.org> References: <1412758505-23495-1-git-send-email-mikey@neuling.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ian Munsie This adds a header file for use by userspace programs wanting to interact with the kernel cxl driver. It defines structs and magic numbers required for userspace to interact with devices in /dev/cxl/afuM.N. Further documentation on this interface is added in a subsequent patch in Documentation/powerpc/cxl.txt. It also adds this new userspace header file to Kbuild so it's exported when doing "make headers_installs". Signed-off-by: Ian Munsie Signed-off-by: Michael Neuling --- include/uapi/Kbuild | 1 + include/uapi/misc/Kbuild | 2 ++ include/uapi/misc/cxl.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 90 insertions(+) create mode 100644 include/uapi/misc/Kbuild create mode 100644 include/uapi/misc/cxl.h diff --git a/include/uapi/Kbuild b/include/uapi/Kbuild index 81d2106..245aa6e 100644 --- a/include/uapi/Kbuild +++ b/include/uapi/Kbuild @@ -12,3 +12,4 @@ header-y += video/ header-y += drm/ header-y += xen/ header-y += scsi/ +header-y += misc/ diff --git a/include/uapi/misc/Kbuild b/include/uapi/misc/Kbuild new file mode 100644 index 0000000..e96cae7 --- /dev/null +++ b/include/uapi/misc/Kbuild @@ -0,0 +1,2 @@ +# misc Header export list +header-y += cxl.h diff --git a/include/uapi/misc/cxl.h b/include/uapi/misc/cxl.h new file mode 100644 index 0000000..c232be6 --- /dev/null +++ b/include/uapi/misc/cxl.h @@ -0,0 +1,87 @@ +/* + * Copyright 2014 IBM Corp. + * + * 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 of the License, or (at your option) any later version. + */ + +#ifndef _UAPI_MISC_CXL_H +#define _UAPI_MISC_CXL_H + +#include +#include + +/* Structs for IOCTLS for userspace to talk to the kernel */ +struct cxl_ioctl_start_work { + __u64 flags; + __u64 work_element_descriptor; + __u64 amr; + __s16 num_interrupts; + __s16 reserved1; + __s32 reserved2; + __u64 reserved3; + __u64 reserved4; + __u64 reserved5; + __u64 reserved6; +}; +#define CXL_START_WORK_AMR 0x0000000000000001ULL +#define CXL_START_WORK_NUM_IRQS 0x0000000000000002ULL +#define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\ + CXL_START_WORK_NUM_IRQS) + +/* IOCTL numbers */ +#define CXL_MAGIC 0xCA +#define CXL_IOCTL_START_WORK _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work) +#define CXL_IOCTL_GET_PROCESS_ELEMENT _IOR(CXL_MAGIC, 0x01, __u32) + +/* Events from read() */ +#define CXL_READ_MIN_SIZE 0x1000 /* 4K */ + +enum cxl_event_type { + CXL_EVENT_RESERVED = 0, + CXL_EVENT_AFU_INTERRUPT = 1, + CXL_EVENT_DATA_STORAGE = 2, + CXL_EVENT_AFU_ERROR = 3, +}; + +struct cxl_event_header { + __u16 type; + __u16 size; + __u16 process_element; + __u16 reserved1; +}; + +struct cxl_event_afu_interrupt { + __u16 flags; + __u16 irq; /* Raised AFU interrupt number */ + __u32 reserved1; +}; + +struct cxl_event_data_storage { + __u16 flags; + __u16 reserved1; + __u32 reserved2; + __u64 addr; + __u64 dsisr; + __u64 reserved3; +}; + +struct cxl_event_afu_error { + __u16 flags; + __u16 reserved1; + __u32 reserved2; + __u64 error; +}; + +struct cxl_event { + struct cxl_event_header header; + union { + struct cxl_event_afu_interrupt irq; + struct cxl_event_data_storage fault; + struct cxl_event_afu_error afu_error; + }; +}; + +#endif /* _UAPI_MISC_CXL_H */ -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/