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_ERR_FF 0x0000000000000004ULL
33 #define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\
34 CXL_START_WORK_NUM_IRQS |\
35 CXL_START_WORK_ERR_FF)
38 /* Possible modes that an afu can be in */
39 #define CXL_MODE_DEDICATED 0x1
40 #define CXL_MODE_DIRECTED 0x2
42 /* possible flags for the cxl_afu_id flags field */
43 #define CXL_AFUID_FLAG_SLAVE 0x1 /* In directed-mode afu is in slave mode */
46 __u64 flags; /* One of CXL_AFUID_FLAG_X */
49 __u32 afu_mode; /* one of the CXL_MODE_X */
58 /* base adapter image header is included in the image */
59 #define CXL_AI_NEED_HEADER 0x0000000000000001ULL
60 #define CXL_AI_ALL CXL_AI_NEED_HEADER
62 #define CXL_AI_HEADER_SIZE 128
63 #define CXL_AI_BUFFER_SIZE 4096
64 #define CXL_AI_MAX_ENTRIES 256
65 #define CXL_AI_MAX_CHUNK_SIZE (CXL_AI_BUFFER_SIZE * CXL_AI_MAX_ENTRIES)
67 struct cxl_adapter_image {
79 #define CXL_MAGIC 0xCA
81 #define CXL_IOCTL_START_WORK _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
82 #define CXL_IOCTL_GET_PROCESS_ELEMENT _IOR(CXL_MAGIC, 0x01, __u32)
83 #define CXL_IOCTL_GET_AFU_ID _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
85 #define CXL_IOCTL_DOWNLOAD_IMAGE _IOW(CXL_MAGIC, 0x0A, struct cxl_adapter_image)
86 #define CXL_IOCTL_VALIDATE_IMAGE _IOW(CXL_MAGIC, 0x0B, struct cxl_adapter_image)
88 #define CXL_READ_MIN_SIZE 0x1000 /* 4K */
90 /* Events from read() */
92 CXL_EVENT_RESERVED = 0,
93 CXL_EVENT_AFU_INTERRUPT = 1,
94 CXL_EVENT_DATA_STORAGE = 2,
95 CXL_EVENT_AFU_ERROR = 3,
96 CXL_EVENT_AFU_DRIVER = 4,
99 struct cxl_event_header {
102 __u16 process_element;
106 struct cxl_event_afu_interrupt {
108 __u16 irq; /* Raised AFU interrupt number */
112 struct cxl_event_data_storage {
121 struct cxl_event_afu_error {
128 struct cxl_event_afu_driver_reserved {
130 * Defines the buffer passed to the cxl driver by the AFU driver.
132 * This is not ABI since the event header.size passed to the user for
133 * existing events is set in the read call to sizeof(cxl_event_header)
134 * + sizeof(whatever event is being dispatched) and the user is already
135 * required to use a 4K buffer on the read call.
137 * Of course the contents will be ABI, but that's up the AFU driver.
144 struct cxl_event_header header;
146 struct cxl_event_afu_interrupt irq;
147 struct cxl_event_data_storage fault;
148 struct cxl_event_afu_error afu_error;
149 struct cxl_event_afu_driver_reserved afu_driver_event;
153 #endif /* _UAPI_MISC_CXL_H */