LXR linux/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
  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_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
  45struct 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() */
  67enum 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
  74struct cxl_event_header {
  75        __u16 type;
  76        __u16 size;
  77        __u16 process_element;
  78        __u16 reserved1;
  79};
  80
  81struct cxl_event_afu_interrupt {
  82        __u16 flags;
  83        __u16 irq; /* Raised AFU interrupt number */
  84        __u32 reserved1;
  85};
  86
  87struct cxl_event_data_storage {
  88        __u16 flags;
  89        __u16 reserved1;
  90        __u32 reserved2;
  91        __u64 addr;
  92        __u64 dsisr;
  93        __u64 reserved3;
  94};
  95
  96struct cxl_event_afu_error {
  97        __u16 flags;
  98        __u16 reserved1;
  99        __u32 reserved2;
 100        __u64 error;
 101};
 102
 103struct 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 */
 113