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cbd74e1bc8
This patch fixes a regression introduced by commitb810253bd9("cxl: Add mechanism for delivering AFU driver specific events"). It changes the type u8 to __u8 in the uapi header cxl.h, because the former is a kernel internal type, and may not be defined in userland build environments, in particular when cross-compiling libcxl on x86_64 linux machines (RHEL6.7 and Ubuntu 16.04). This patch also changes the size of the field data_size, and makes it constant, to support 32-bit userland applications running on big-endian ppc64 kernels transparently. mpe: This is an ABI change, however the ABI was only added during the 4.8 merge window so has never been part of a released kernel - therefore we give ourselves permission to change it. Fixes:b810253bd9("cxl: Add mechanism for delivering AFU driver specific events") Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com> Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
/*
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* Copyright 2014 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _UAPI_MISC_CXL_H
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#define _UAPI_MISC_CXL_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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struct cxl_ioctl_start_work {
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__u64 flags;
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__u64 work_element_descriptor;
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__u64 amr;
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__s16 num_interrupts;
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__s16 reserved1;
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__s32 reserved2;
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__u64 reserved3;
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__u64 reserved4;
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__u64 reserved5;
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__u64 reserved6;
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};
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#define CXL_START_WORK_AMR 0x0000000000000001ULL
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#define CXL_START_WORK_NUM_IRQS 0x0000000000000002ULL
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#define CXL_START_WORK_ERR_FF 0x0000000000000004ULL
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#define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\
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CXL_START_WORK_NUM_IRQS |\
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CXL_START_WORK_ERR_FF)
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/* Possible modes that an afu can be in */
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#define CXL_MODE_DEDICATED 0x1
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#define CXL_MODE_DIRECTED 0x2
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/* possible flags for the cxl_afu_id flags field */
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#define CXL_AFUID_FLAG_SLAVE 0x1 /* In directed-mode afu is in slave mode */
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struct cxl_afu_id {
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__u64 flags; /* One of CXL_AFUID_FLAG_X */
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__u32 card_id;
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__u32 afu_offset;
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__u32 afu_mode; /* one of the CXL_MODE_X */
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__u32 reserved1;
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__u64 reserved2;
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__u64 reserved3;
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__u64 reserved4;
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__u64 reserved5;
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__u64 reserved6;
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};
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/* base adapter image header is included in the image */
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#define CXL_AI_NEED_HEADER 0x0000000000000001ULL
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#define CXL_AI_ALL CXL_AI_NEED_HEADER
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#define CXL_AI_HEADER_SIZE 128
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#define CXL_AI_BUFFER_SIZE 4096
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#define CXL_AI_MAX_ENTRIES 256
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#define CXL_AI_MAX_CHUNK_SIZE (CXL_AI_BUFFER_SIZE * CXL_AI_MAX_ENTRIES)
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struct cxl_adapter_image {
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__u64 flags;
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__u64 data;
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__u64 len_data;
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__u64 len_image;
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__u64 reserved1;
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__u64 reserved2;
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__u64 reserved3;
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__u64 reserved4;
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};
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/* ioctl numbers */
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#define CXL_MAGIC 0xCA
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/* AFU devices */
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#define CXL_IOCTL_START_WORK _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
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#define CXL_IOCTL_GET_PROCESS_ELEMENT _IOR(CXL_MAGIC, 0x01, __u32)
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#define CXL_IOCTL_GET_AFU_ID _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
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/* adapter devices */
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#define CXL_IOCTL_DOWNLOAD_IMAGE _IOW(CXL_MAGIC, 0x0A, struct cxl_adapter_image)
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#define CXL_IOCTL_VALIDATE_IMAGE _IOW(CXL_MAGIC, 0x0B, struct cxl_adapter_image)
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#define CXL_READ_MIN_SIZE 0x1000 /* 4K */
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/* Events from read() */
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enum cxl_event_type {
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CXL_EVENT_RESERVED = 0,
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CXL_EVENT_AFU_INTERRUPT = 1,
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CXL_EVENT_DATA_STORAGE = 2,
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CXL_EVENT_AFU_ERROR = 3,
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CXL_EVENT_AFU_DRIVER = 4,
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};
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struct cxl_event_header {
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__u16 type;
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__u16 size;
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__u16 process_element;
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__u16 reserved1;
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};
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struct cxl_event_afu_interrupt {
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__u16 flags;
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__u16 irq; /* Raised AFU interrupt number */
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__u32 reserved1;
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};
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struct cxl_event_data_storage {
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__u16 flags;
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__u16 reserved1;
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__u32 reserved2;
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__u64 addr;
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__u64 dsisr;
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__u64 reserved3;
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};
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struct cxl_event_afu_error {
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__u16 flags;
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__u16 reserved1;
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__u32 reserved2;
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__u64 error;
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};
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struct cxl_event_afu_driver_reserved {
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/*
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* Defines the buffer passed to the cxl driver by the AFU driver.
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*
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* This is not ABI since the event header.size passed to the user for
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* existing events is set in the read call to sizeof(cxl_event_header)
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* + sizeof(whatever event is being dispatched) and the user is already
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* required to use a 4K buffer on the read call.
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*
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* Of course the contents will be ABI, but that's up the AFU driver.
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*/
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__u32 data_size;
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__u8 data[];
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};
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struct cxl_event {
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struct cxl_event_header header;
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union {
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struct cxl_event_afu_interrupt irq;
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struct cxl_event_data_storage fault;
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struct cxl_event_afu_error afu_error;
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struct cxl_event_afu_driver_reserved afu_driver_event;
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};
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};
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#endif /* _UAPI_MISC_CXL_H */
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