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cxl.h
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/* 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 */