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Diffstat (limited to 'include/uapi/misc/cxl.h')
| -rw-r--r-- | include/uapi/misc/cxl.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/include/uapi/misc/cxl.h b/include/uapi/misc/cxl.h new file mode 100644 index 0000000000..56376d3907 --- /dev/null +++ b/include/uapi/misc/cxl.h @@ -0,0 +1,156 @@ +/* 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 _UAPI_MISC_CXL_H +#define _UAPI_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 /* _UAPI_MISC_CXL_H */ |