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Viewing File: cxl.h
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* 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;
__u16 tid;
__s32 reserved1;
__u64 reserved2;
__u64 reserved3;
__u64 reserved4;
__u64 reserved5;
};
#define CXL_START_WORK_AMR 0x0000000000000001ULL
#define CXL_START_WORK_NUM_IRQS 0x0000000000000002ULL
#define CXL_START_WORK_ERR_FF 0x0000000000000004ULL
#define CXL_START_WORK_TID 0x0000000000000008ULL
#define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\
CXL_START_WORK_NUM_IRQS |\
CXL_START_WORK_ERR_FF |\
CXL_START_WORK_TID)
/* 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;
};
/* base adapter image header is included in the image */
#define CXL_AI_NEED_HEADER 0x0000000000000001ULL
#define CXL_AI_ALL CXL_AI_NEED_HEADER
#define CXL_AI_HEADER_SIZE 128
#define CXL_AI_BUFFER_SIZE 4096
#define CXL_AI_MAX_ENTRIES 256
#define CXL_AI_MAX_CHUNK_SIZE (CXL_AI_BUFFER_SIZE * CXL_AI_MAX_ENTRIES)
struct cxl_adapter_image {
__u64 flags;
__u64 data;
__u64 len_data;
__u64 len_image;
__u64 reserved1;
__u64 reserved2;
__u64 reserved3;
__u64 reserved4;
};
/* ioctl numbers */
#define CXL_MAGIC 0xCA
/* AFU devices */
#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)
/* adapter devices */
#define CXL_IOCTL_DOWNLOAD_IMAGE _IOW(CXL_MAGIC, 0x0A, struct cxl_adapter_image)
#define CXL_IOCTL_VALIDATE_IMAGE _IOW(CXL_MAGIC, 0x0B, struct cxl_adapter_image)
#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,
CXL_EVENT_AFU_DRIVER = 4,
};
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_afu_driver_reserved {
/*
* Defines the buffer passed to the cxl driver by the AFU driver.
*
* This is not ABI since the event header.size passed to the user for
* existing events is set in the read call to sizeof(cxl_event_header)
* + sizeof(whatever event is being dispatched) and the user is already
* required to use a 4K buffer on the read call.
*
* Of course the contents will be ABI, but that's up the AFU driver.
*/
__u32 data_size;
__u8 data[];
};
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;
struct cxl_event_afu_driver_reserved afu_driver_event;
};
};
#endif /* _MISC_CXL_H */
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