[mirror_ubuntu-focal-kernel.git] / include / uapi / misc / cxl.h

/*
 * 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;
	__s16 reserved1;
	__s32 reserved2;
	__u64 reserved3;
	__u64 reserved4;
	__u64 reserved5;
	__u64 reserved6;
};

#define CXL_START_WORK_AMR		0x0000000000000001ULL
#define CXL_START_WORK_NUM_IRQS		0x0000000000000002ULL
#define CXL_START_WORK_ALL		(CXL_START_WORK_AMR |\
					 CXL_START_WORK_NUM_IRQS)


/* 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;
};

/* ioctl numbers */
#define CXL_MAGIC 0xCA
#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)

#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,
};

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 {
	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;
	};
};

#endif /* _UAPI_MISC_CXL_H */
Commit	Line	Data
66b43081 IM	1	/*
	2	* Copyright 2014 IBM Corp.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*/
	9
	10	#ifndef _UAPI_MISC_CXL_H
	11	#define _UAPI_MISC_CXL_H
	12
	13	#include <linux/types.h>
	14	#include <linux/ioctl.h>
	15
a9282d01	16
66b43081 IM	17	struct cxl_ioctl_start_work {
	18	__u64 flags;
	19	__u64 work_element_descriptor;
	20	__u64 amr;
	21	__s16 num_interrupts;
	22	__s16 reserved1;
	23	__s32 reserved2;
	24	__u64 reserved3;
	25	__u64 reserved4;
	26	__u64 reserved5;
	27	__u64 reserved6;
	28	};
a9282d01	29
66b43081 IM	30	#define CXL_START_WORK_AMR 0x0000000000000001ULL
	31	#define CXL_START_WORK_NUM_IRQS 0x0000000000000002ULL
	32	#define CXL_START_WORK_ALL (CXL_START_WORK_AMR \|\
	33	CXL_START_WORK_NUM_IRQS)
	34
27d4dc71 VJ	35
	36	/* Possible modes that an afu can be in */
	37	#define CXL_MODE_DEDICATED 0x1
	38	#define CXL_MODE_DIRECTED 0x2
	39
	40	/* possible flags for the cxl_afu_id flags field */
	41	#define CXL_AFUID_FLAG_SLAVE 0x1 /* In directed-mode afu is in slave mode */
	42
	43	struct cxl_afu_id {
	44	__u64 flags; /* One of CXL_AFUID_FLAG_X */
	45	__u32 card_id;
	46	__u32 afu_offset;
	47	__u32 afu_mode; /* one of the CXL_MODE_X */
	48	__u32 reserved1;
	49	__u64 reserved2;
	50	__u64 reserved3;
	51	__u64 reserved4;
	52	__u64 reserved5;
	53	__u64 reserved6;
	54	};
	55
a9282d01	56	/* ioctl numbers */
66b43081 IM	57	#define CXL_MAGIC 0xCA
	58	#define CXL_IOCTL_START_WORK _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
	59	#define CXL_IOCTL_GET_PROCESS_ELEMENT _IOR(CXL_MAGIC, 0x01, __u32)
27d4dc71	60	#define CXL_IOCTL_GET_AFU_ID _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
66b43081	61
66b43081 IM	62	#define CXL_READ_MIN_SIZE 0x1000 /* 4K */
66b43081 IM	63
a9282d01	64	/* Events from read() */
66b43081 IM	65	enum cxl_event_type {
	66	CXL_EVENT_RESERVED = 0,
	67	CXL_EVENT_AFU_INTERRUPT = 1,
	68	CXL_EVENT_DATA_STORAGE = 2,
	69	CXL_EVENT_AFU_ERROR = 3,
	70	};
	71
	72	struct cxl_event_header {
	73	__u16 type;
	74	__u16 size;
	75	__u16 process_element;
	76	__u16 reserved1;
	77	};
	78
	79	struct cxl_event_afu_interrupt {
	80	__u16 flags;
	81	__u16 irq; /* Raised AFU interrupt number */
	82	__u32 reserved1;
	83	};
	84
	85	struct cxl_event_data_storage {
	86	__u16 flags;
	87	__u16 reserved1;
	88	__u32 reserved2;
	89	__u64 addr;
	90	__u64 dsisr;
	91	__u64 reserved3;
	92	};
	93
	94	struct cxl_event_afu_error {
	95	__u16 flags;
	96	__u16 reserved1;
	97	__u32 reserved2;
	98	__u64 error;
	99	};
	100
	101	struct cxl_event {
	102	struct cxl_event_header header;
	103	union {
	104	struct cxl_event_afu_interrupt irq;
	105	struct cxl_event_data_storage fault;
	106	struct cxl_event_afu_error afu_error;
	107	};
	108	};
	109
	110	#endif /* _UAPI_MISC_CXL_H */