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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */2/*3 * Copyright 2014 IBM Corp.4 *5 * This program is free software; you can redistribute it and/or6 * modify it under the terms of the GNU General Public License7 * as published by the Free Software Foundation; either version8 * 2 of the License, or (at your option) any later version.9 */10 11#ifndef _UAPI_MISC_CXL_H12#define _UAPI_MISC_CXL_H13 14#include <linux/types.h>15#include <linux/ioctl.h>16 17 18struct cxl_ioctl_start_work {19 __u64 flags;20 __u64 work_element_descriptor;21 __u64 amr;22 __s16 num_interrupts;23 __u16 tid;24 __s32 reserved1;25 __u64 reserved2;26 __u64 reserved3;27 __u64 reserved4;28 __u64 reserved5;29};30 31#define CXL_START_WORK_AMR 0x0000000000000001ULL32#define CXL_START_WORK_NUM_IRQS 0x0000000000000002ULL33#define CXL_START_WORK_ERR_FF 0x0000000000000004ULL34#define CXL_START_WORK_TID 0x0000000000000008ULL35#define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\36 CXL_START_WORK_NUM_IRQS |\37 CXL_START_WORK_ERR_FF |\38 CXL_START_WORK_TID)39 40 41/* Possible modes that an afu can be in */42#define CXL_MODE_DEDICATED 0x143#define CXL_MODE_DIRECTED 0x244 45/* possible flags for the cxl_afu_id flags field */46#define CXL_AFUID_FLAG_SLAVE 0x1 /* In directed-mode afu is in slave mode */47 48struct cxl_afu_id {49 __u64 flags; /* One of CXL_AFUID_FLAG_X */50 __u32 card_id;51 __u32 afu_offset;52 __u32 afu_mode; /* one of the CXL_MODE_X */53 __u32 reserved1;54 __u64 reserved2;55 __u64 reserved3;56 __u64 reserved4;57 __u64 reserved5;58 __u64 reserved6;59};60 61/* base adapter image header is included in the image */62#define CXL_AI_NEED_HEADER 0x0000000000000001ULL63#define CXL_AI_ALL CXL_AI_NEED_HEADER64 65#define CXL_AI_HEADER_SIZE 12866#define CXL_AI_BUFFER_SIZE 409667#define CXL_AI_MAX_ENTRIES 25668#define CXL_AI_MAX_CHUNK_SIZE (CXL_AI_BUFFER_SIZE * CXL_AI_MAX_ENTRIES)69 70struct cxl_adapter_image {71 __u64 flags;72 __u64 data;73 __u64 len_data;74 __u64 len_image;75 __u64 reserved1;76 __u64 reserved2;77 __u64 reserved3;78 __u64 reserved4;79};80 81/* ioctl numbers */82#define CXL_MAGIC 0xCA83/* AFU devices */84#define CXL_IOCTL_START_WORK _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)85#define CXL_IOCTL_GET_PROCESS_ELEMENT _IOR(CXL_MAGIC, 0x01, __u32)86#define CXL_IOCTL_GET_AFU_ID _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)87/* adapter devices */88#define CXL_IOCTL_DOWNLOAD_IMAGE _IOW(CXL_MAGIC, 0x0A, struct cxl_adapter_image)89#define CXL_IOCTL_VALIDATE_IMAGE _IOW(CXL_MAGIC, 0x0B, struct cxl_adapter_image)90 91#define CXL_READ_MIN_SIZE 0x1000 /* 4K */92 93/* Events from read() */94enum cxl_event_type {95 CXL_EVENT_RESERVED = 0,96 CXL_EVENT_AFU_INTERRUPT = 1,97 CXL_EVENT_DATA_STORAGE = 2,98 CXL_EVENT_AFU_ERROR = 3,99 CXL_EVENT_AFU_DRIVER = 4,100};101 102struct cxl_event_header {103 __u16 type;104 __u16 size;105 __u16 process_element;106 __u16 reserved1;107};108 109struct cxl_event_afu_interrupt {110 __u16 flags;111 __u16 irq; /* Raised AFU interrupt number */112 __u32 reserved1;113};114 115struct cxl_event_data_storage {116 __u16 flags;117 __u16 reserved1;118 __u32 reserved2;119 __u64 addr;120 __u64 dsisr;121 __u64 reserved3;122};123 124struct cxl_event_afu_error {125 __u16 flags;126 __u16 reserved1;127 __u32 reserved2;128 __u64 error;129};130 131struct cxl_event_afu_driver_reserved {132 /*133 * Defines the buffer passed to the cxl driver by the AFU driver.134 *135 * This is not ABI since the event header.size passed to the user for136 * existing events is set in the read call to sizeof(cxl_event_header)137 * + sizeof(whatever event is being dispatched) and the user is already138 * required to use a 4K buffer on the read call.139 *140 * Of course the contents will be ABI, but that's up the AFU driver.141 */142 __u32 data_size;143 __u8 data[];144};145 146struct cxl_event {147 struct cxl_event_header header;148 union {149 struct cxl_event_afu_interrupt irq;150 struct cxl_event_data_storage fault;151 struct cxl_event_afu_error afu_error;152 struct cxl_event_afu_driver_reserved afu_driver_event;153 };154};155 156#endif /* _UAPI_MISC_CXL_H */157