2 * Copyright 2014 IBM Corp.
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.
10 #ifndef _UAPI_MISC_CXL_H
11 #define _UAPI_MISC_CXL_H
13 #include <linux/types.h>
14 #include <linux/ioctl.h>
17 struct cxl_ioctl_start_work {
19 __u64 work_element_descriptor;
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)
36 /* Possible modes that an afu can be in */
37 #define CXL_MODE_DEDICATED 0x1
38 #define CXL_MODE_DIRECTED 0x2
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 */
44 __u64 flags; /* One of CXL_AFUID_FLAG_X */
47 __u32 afu_mode; /* one of the CXL_MODE_X */
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)
60 #define CXL_IOCTL_GET_AFU_ID _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
62 #define CXL_READ_MIN_SIZE 0x1000 /* 4K */
64 /* Events from read() */
66 CXL_EVENT_RESERVED = 0,
67 CXL_EVENT_AFU_INTERRUPT = 1,
68 CXL_EVENT_DATA_STORAGE = 2,
69 CXL_EVENT_AFU_ERROR = 3,
72 struct cxl_event_header {
75 __u16 process_element;
79 struct cxl_event_afu_interrupt {
81 __u16 irq; /* Raised AFU interrupt number */
85 struct cxl_event_data_storage {
94 struct cxl_event_afu_error {
102 struct cxl_event_header header;
104 struct cxl_event_afu_interrupt irq;
105 struct cxl_event_data_storage fault;
106 struct cxl_event_afu_error afu_error;
110 #endif /* _UAPI_MISC_CXL_H */