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 /*  Set Context Options */
  36 #define GRU_SET_CONTEXT_OPTION          _IOWR(GRU_IOCTL_NUM, 4, 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 dumpping GRU chiplet state */
  48 #define GRU_DUMP_CHIPLET_STATE          _IOWR(GRU_IOCTL_NUM, 11, void *)
  49
  50 /* For getting gseg statistics */
  51 #define GRU_GET_GSEG_STATISTICS         _IOWR(GRU_IOCTL_NUM, 12, 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 #define GSEG_START(cb)                  ((void *)((unsigned long)(cb) & ~(GRU_GSEG_PAGESIZE - 1)))
  65
  66 /*
  67  * Statictics kept on a per-GTS basis.
  68  */
  69 struct gts_statistics {
  70         unsigned long   fmm_tlbdropin;
  71         unsigned long   upm_tlbdropin;
  72         unsigned long   context_stolen;
  73 };
  74
  75 struct gru_get_gseg_statistics_req {
  76         unsigned long           gseg;
  77         struct gts_statistics   stats;
  78 };
  79
  80 /*
  81  * Structure used to pass TLB flush parameters to the driver
  82  */
  83 struct gru_create_context_req {
  84         unsigned long           gseg;
  85         unsigned int            data_segment_bytes;
  86         unsigned int            control_blocks;
  87         unsigned int            maximum_thread_count;
  88         unsigned int            options;
  89 };
  90
  91 /*
  92  * Structure used to pass unload context parameters to the driver
  93  */
  94 struct gru_unload_context_req {
  95         unsigned long   gseg;
  96 };
  97
  98 /*
  99  * Structure used to set context options
 100  */
 101 enum {sco_gseg_owner, sco_cch_req_slice, sco_blade_chiplet};
 102 struct gru_set_context_option_req {
 103         unsigned long   gseg;
 104         int             op;
 105         int             val0;
 106         long            val1;
 107 };
 108
 109 /*
 110  * Structure used to pass TLB flush parameters to the driver
 111  */
 112 struct gru_flush_tlb_req {
 113         unsigned long   gseg;
 114         unsigned long   vaddr;
 115         size_t          len;
 116 };
 117
 118 /*
 119  * Structure used to pass TLB flush parameters to the driver
 120  */
 121 enum {dcs_pid, dcs_gid};
 122 struct gru_dump_chiplet_state_req {
 123         unsigned int    op;
 124         unsigned int    gid;
 125         int             ctxnum;
 126         char            data_opt;
 127         char            lock_cch;
 128         char            flush_cbrs;
 129         char            fill[10];
 130         pid_t           pid;
 131         void            *buf;
 132         size_t          buflen;
 133         /* ---- output --- */
 134         unsigned int    num_contexts;
 135 };
 136
 137 #define GRU_DUMP_MAGIC  0x3474ab6c
 138 struct gru_dump_context_header {
 139         unsigned int    magic;
 140         unsigned int    gid;
 141         unsigned char   ctxnum;
 142         unsigned char   cbrcnt;
 143         unsigned char   dsrcnt;
 144         pid_t           pid;
 145         unsigned long   vaddr;
 146         int             cch_locked;
 147         unsigned long   data[0];
 148 };
 149
 150 /*
 151  * GRU configuration info (temp - for testing)
 152  */
 153 struct gru_config_info {
 154         int             cpus;
 155         int             blades;
 156         int             nodes;
 157         int             chiplets;
 158         int             fill[16];
 159 };
 160
 161 #endif /* __GRULIB_H__ */