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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */

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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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#ifndef _MISC_CXL_H

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#define _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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__u16 tid;

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__s32 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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};

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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_TID 0x0000000000000008ULL

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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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CXL_START_WORK_TID)

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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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* Defines the buffer passed to the cxl driver by the AFU driver.

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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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* Of course the contents will be ABI, but that's up the AFU driver.

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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 /* _MISC_CXL_H */

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