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_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)
  36
  37
  38 /* Possible modes that an afu can be in */
  39 #define CXL_MODE_DEDICATED   0x1
  40 #define CXL_MODE_DIRECTED    0x2
  41
  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 */
  44
  45 struct cxl_afu_id {
  46         __u64 flags;     /* One of CXL_AFUID_FLAG_X */
  47         __u32 card_id;
  48         __u32 afu_offset;
  49         __u32 afu_mode;  /* one of the CXL_MODE_X */
  50         __u32 reserved1;
  51         __u64 reserved2;
  52         __u64 reserved3;
  53         __u64 reserved4;
  54         __u64 reserved5;
  55         __u64 reserved6;
  56 };
  57
  58 /* ioctl numbers */
  59 #define CXL_MAGIC 0xCA
  60 #define CXL_IOCTL_START_WORK            _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
  61 #define CXL_IOCTL_GET_PROCESS_ELEMENT   _IOR(CXL_MAGIC, 0x01, __u32)
  62 #define CXL_IOCTL_GET_AFU_ID            _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
  63
  64 #define CXL_READ_MIN_SIZE 0x1000 /* 4K */
  65
  66 /* Events from read() */
  67 enum cxl_event_type {
  68         CXL_EVENT_RESERVED      = 0,
  69         CXL_EVENT_AFU_INTERRUPT = 1,
  70         CXL_EVENT_DATA_STORAGE  = 2,
  71         CXL_EVENT_AFU_ERROR     = 3,
  72 };
  73
  74 struct cxl_event_header {
  75         __u16 type;
  76         __u16 size;
  77         __u16 process_element;
  78         __u16 reserved1;
  79 };
  80
  81 struct cxl_event_afu_interrupt {
  82         __u16 flags;
  83         __u16 irq; /* Raised AFU interrupt number */
  84         __u32 reserved1;
  85 };
  86
  87 struct cxl_event_data_storage {
  88         __u16 flags;
  89         __u16 reserved1;
  90         __u32 reserved2;
  91         __u64 addr;
  92         __u64 dsisr;
  93         __u64 reserved3;
  94 };
  95
  96 struct cxl_event_afu_error {
  97         __u16 flags;
  98         __u16 reserved1;
  99         __u32 reserved2;
 100         __u64 error;
 101 };
 102
 103 struct cxl_event {
 104         struct cxl_event_header header;
 105         union {
 106                 struct cxl_event_afu_interrupt irq;
 107                 struct cxl_event_data_storage fault;
 108                 struct cxl_event_afu_error afu_error;
 109         };
 110 };
 111
 112 #endif /* _UAPI_MISC_CXL_H */