drivers/misc/sgi-gru/grulib.h

   1 /*
   2  *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU Lesser General Public License as published by
   6  *  the Free Software Foundation; either version 2.1 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU Lesser General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU Lesser General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17  */
  18
  19 #ifndef __GRULIB_H__
  20 #define __GRULIB_H__
  21
  22 #define GRU_BASENAME            "gru"
  23 #define GRU_FULLNAME            "/dev/gru"
  24 #define GRU_IOCTL_NUM            'G'
  25
  26 /*
  27  * Maximum number of GRU segments that a user can have open
  28  * ZZZ temp - set high for testing. Revisit.
  29  */
  30 #define GRU_MAX_OPEN_CONTEXTS           32
  31
  32 /* Set Number of Request Blocks */
  33 #define GRU_CREATE_CONTEXT              _IOWR(GRU_IOCTL_NUM, 1, void *)
  34
  35 /* Register task as using the slice */
  36 #define GRU_SET_TASK_SLICE              _IOWR(GRU_IOCTL_NUM, 5, void *)
  37
  38 /* Fetch exception detail */
  39 #define GRU_USER_GET_EXCEPTION_DETAIL   _IOWR(GRU_IOCTL_NUM, 6, void *)
  40
  41 /* For user call_os handling - normally a TLB fault */
  42 #define GRU_USER_CALL_OS                _IOWR(GRU_IOCTL_NUM, 8, void *)
  43
  44 /* For user unload context */
  45 #define GRU_USER_UNLOAD_CONTEXT         _IOWR(GRU_IOCTL_NUM, 9, void *)
  46
  47 /* For fetching GRU chiplet status */
  48 #define GRU_GET_CHIPLET_STATUS          _IOWR(GRU_IOCTL_NUM, 10, void *)
  49
  50 /* For dumpping GRU chiplet state */
  51 #define GRU_DUMP_CHIPLET_STATE          _IOWR(GRU_IOCTL_NUM, 11, void *)
  52
  53 /* For user TLB flushing (primarily for tests) */
  54 #define GRU_USER_FLUSH_TLB              _IOWR(GRU_IOCTL_NUM, 50, void *)
  55
  56 /* Get some config options (primarily for tests & emulator) */
  57 #define GRU_GET_CONFIG_INFO             _IOWR(GRU_IOCTL_NUM, 51, void *)
  58
  59 /* Various kernel self-tests */
  60 #define GRU_KTEST                       _IOWR(GRU_IOCTL_NUM, 52, void *)
  61
  62 #define CONTEXT_WINDOW_BYTES(th)        (GRU_GSEG_PAGESIZE * (th))
  63 #define THREAD_POINTER(p, th)           (p + GRU_GSEG_PAGESIZE * (th))
  64
  65 /*
  66  * Structure used to pass TLB flush parameters to the driver
  67  */
  68 struct gru_create_context_req {
  69         unsigned long           gseg;
  70         unsigned int            data_segment_bytes;
  71         unsigned int            control_blocks;
  72         unsigned int            maximum_thread_count;
  73         unsigned int            options;
  74 };
  75
  76 /*
  77  * Structure used to pass unload context parameters to the driver
  78  */
  79 struct gru_unload_context_req {
  80         unsigned long   gseg;
  81 };
  82
  83 /*
  84  * Structure used to pass TLB flush parameters to the driver
  85  */
  86 struct gru_flush_tlb_req {
  87         unsigned long   gseg;
  88         unsigned long   vaddr;
  89         size_t          len;
  90 };
  91
  92 /*
  93  * Structure used to pass TLB flush parameters to the driver
  94  */
  95 enum {dcs_pid, dcs_gid};
  96 struct gru_dump_chiplet_state_req {
  97         unsigned int    op;
  98         int             gid;
  99         int             ctxnum;
 100         char            data_opt;
 101         char            lock_cch;
 102         pid_t           pid;
 103         void            *buf;
 104         size_t          buflen;
 105         /* ---- output --- */
 106         unsigned int    num_contexts;
 107 };
 108
 109 #define GRU_DUMP_MAGIC  0x3474ab6c
 110 struct gru_dump_context_header {
 111         unsigned int    magic;
 112         unsigned char   gid;
 113         unsigned char   ctxnum;
 114         unsigned char   cbrcnt;
 115         unsigned char   dsrcnt;
 116         pid_t           pid;
 117         unsigned long   vaddr;
 118         int             cch_locked;
 119         unsigned long   data[0];
 120 };
 121
 122 /*
 123  * GRU configuration info (temp - for testing)
 124  */
 125 struct gru_config_info {
 126         int             cpus;
 127         int             blades;
 128         int             nodes;
 129         int             chiplets;
 130         int             fill[16];
 131 };
 132
 133 #endif /* __GRULIB_H__ */