/usr/include/misc/cxl.h is in linux-libc-dev 4.4.0-21.37.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* 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 _MISC_CXL_H
#define _MISC_CXL_H
#include <linux/types.h>
#include <linux/ioctl.h>
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_ERR_FF 0x0000000000000004ULL
#define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\
CXL_START_WORK_NUM_IRQS |\
CXL_START_WORK_ERR_FF)
/* Possible modes that an afu can be in */
#define CXL_MODE_DEDICATED 0x1
#define CXL_MODE_DIRECTED 0x2
/* possible flags for the cxl_afu_id flags field */
#define CXL_AFUID_FLAG_SLAVE 0x1 /* In directed-mode afu is in slave mode */
struct cxl_afu_id {
__u64 flags; /* One of CXL_AFUID_FLAG_X */
__u32 card_id;
__u32 afu_offset;
__u32 afu_mode; /* one of the CXL_MODE_X */
__u32 reserved1;
__u64 reserved2;
__u64 reserved3;
__u64 reserved4;
__u64 reserved5;
__u64 reserved6;
};
/* 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)
#define CXL_IOCTL_GET_AFU_ID _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
#define CXL_READ_MIN_SIZE 0x1000 /* 4K */
/* Events from read() */
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 /* _MISC_CXL_H */
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