drivers/char/rio/route.h

   1 /****************************************************************************
   2  *******                                                              *******
   3  *******                 R O U T E     H E A D E R
   4  *******                                                              *******
   5  ****************************************************************************
   6
   7  Author  : Ian Nandhra / Jeremy Rolls
   8  Date    :
   9
  10  *
  11  *  (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
  12  *
  13  *      This program is free software; you can redistribute it and/or modify
  14  *      it under the terms of the GNU General Public License as published by
  15  *      the Free Software Foundation; either version 2 of the License, or
  16  *      (at your option) any later version.
  17  *
  18  *      This program is distributed in the hope that it will be useful,
  19  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *      GNU General Public License for more details.
  22  *
  23  *      You should have received a copy of the GNU General Public License
  24  *      along with this program; if not, write to the Free Software
  25  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26
  27  Version : 0.01
  28
  29
  30                             Mods
  31  ----------------------------------------------------------------------------
  32   Date     By                Description
  33  ----------------------------------------------------------------------------
  34
  35  ***************************************************************************/
  36
  37 #ifndef _route_h
  38 #define _route_h
  39
  40 #define MAX_LINKS 4
  41 #define MAX_NODES 17            /* Maximum nodes in a subnet */
  42 #define NODE_BYTES ((MAX_NODES / 8) + 1)        /* Number of bytes needed for
  43                                                    1 bit per node */
  44 #define ROUTE_DATA_SIZE  (NODE_BYTES + 2)       /* Number of bytes for complete
  45                                                    info about cost etc. */
  46 #define ROUTES_PER_PACKET ((PKT_MAX_DATA_LEN -2)/ ROUTE_DATA_SIZE)
  47                                               /* Number of nodes we can squeeze
  48                                                  into one packet */
  49 #define MAX_TOPOLOGY_PACKETS (MAX_NODES / ROUTES_PER_PACKET + 1)
  50 /************************************************
  51  * Define the types of command for the ROUTE RUP.
  52  ************************************************/
  53 #define ROUTE_REQUEST    0      /* Request an ID */
  54 #define ROUTE_FOAD       1      /* Kill the RTA */
  55 #define ROUTE_ALREADY    2      /* ID given already */
  56 #define ROUTE_USED       3      /* All ID's used */
  57 #define ROUTE_ALLOCATE   4      /* Here it is */
  58 #define ROUTE_REQ_TOP    5      /* I bet you didn't expect....
  59                                    the Topological Inquisition */
  60 #define ROUTE_TOPOLOGY   6      /* Topology request answered FD */
  61 /*******************************************************************
  62  * Define the Route Map Structure
  63  *
  64  * The route map gives a pointer to a Link Structure to use.
  65  * This allows Disconnected Links to be checked quickly
  66  ******************************************************************/
  67 typedef struct COST_ROUTE COST_ROUTE;
  68 struct COST_ROUTE {
  69         unsigned char cost;     /* Cost down this link */
  70         unsigned char route[NODE_BYTES];        /* Nodes thorough this route */
  71 };
  72
  73 typedef struct ROUTE_STR ROUTE_STR;
  74 struct ROUTE_STR {
  75         COST_ROUTE cost_route[MAX_LINKS];
  76         /* cost / route for this link */
  77         ushort favoured;        /* favoured link */
  78 };
  79
  80
  81 #define NO_LINK            (short) 5    /* Link unattached */
  82 #define ROUTE_NO_ID        (short) 100  /* No Id */
  83 #define ROUTE_DISCONNECT   (ushort) 0xff        /* Not connected */
  84 #define ROUTE_INTERCONNECT (ushort) 0x40        /* Sub-net interconnect */
  85
  86
  87 #define SYNC_RUP         (ushort) 255
  88 #define COMMAND_RUP      (ushort) 254
  89 #define ERROR_RUP        (ushort) 253
  90 #define POLL_RUP         (ushort) 252
  91 #define BOOT_RUP         (ushort) 251
  92 #define ROUTE_RUP        (ushort) 250
  93 #define STATUS_RUP       (ushort) 249
  94 #define POWER_RUP        (ushort) 248
  95
  96 #define HIGHEST_RUP      (ushort) 255   /* Set to Top one */
  97 #define LOWEST_RUP       (ushort) 248   /* Set to bottom one */
  98
  99 #endif
 100
 101 /*********** end of file ***********/