include/uapi/misc/cxl.h

   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
  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 };
  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() */
  43 enum 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
  50 struct cxl_event_header {
  51         __u16 type;
  52         __u16 size;
  53         __u16 process_element;
  54         __u16 reserved1;
  55 };
  56
  57 struct cxl_event_afu_interrupt {
  58         __u16 flags;
  59         __u16 irq; /* Raised AFU interrupt number */
  60         __u32 reserved1;
  61 };
  62
  63 struct cxl_event_data_storage {
  64         __u16 flags;
  65         __u16 reserved1;
  66         __u32 reserved2;
  67         __u64 addr;
  68         __u64 dsisr;
  69         __u64 reserved3;
  70 };
  71
  72 struct cxl_event_afu_error {
  73         __u16 flags;
  74         __u16 reserved1;
  75         __u32 reserved2;
  76         __u64 error;
  77 };
  78
  79 struct 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 */