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
16
17struct 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};
29
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
35/* ioctl numbers */
36#define CXL_MAGIC 0xCA
37#define CXL_IOCTL_START_WORK		_IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
38#define CXL_IOCTL_GET_PROCESS_ELEMENT	_IOR(CXL_MAGIC, 0x01, __u32)
39
40#define CXL_READ_MIN_SIZE 0x1000 /* 4K */
41
42/* Events from read() */
43enum cxl_event_type {
44	CXL_EVENT_RESERVED      = 0,
45	CXL_EVENT_AFU_INTERRUPT = 1,
46	CXL_EVENT_DATA_STORAGE  = 2,
47	CXL_EVENT_AFU_ERROR     = 3,
48};
49
50struct cxl_event_header {
51	__u16 type;
52	__u16 size;
53	__u16 process_element;
54	__u16 reserved1;
55};
56
57struct cxl_event_afu_interrupt {
58	__u16 flags;
59	__u16 irq; /* Raised AFU interrupt number */
60	__u32 reserved1;
61};
62
63struct cxl_event_data_storage {
64	__u16 flags;
65	__u16 reserved1;
66	__u32 reserved2;
67	__u64 addr;
68	__u64 dsisr;
69	__u64 reserved3;
70};
71
72struct cxl_event_afu_error {
73	__u16 flags;
74	__u16 reserved1;
75	__u32 reserved2;
76	__u64 error;
77};
78
79struct cxl_event {
80	struct cxl_event_header header;
81	union {
82		struct cxl_event_afu_interrupt irq;
83		struct cxl_event_data_storage fault;
84		struct cxl_event_afu_error afu_error;
85	};
86};
87
88#endif /* _UAPI_MISC_CXL_H */
89