drivers/char/rio/rup.h

   1 /****************************************************************************
   2  *******                                                              *******
   3  *******               R U P   S T R U C T U R E
   4  *******                                                              *******
   5  ****************************************************************************
   6
   7  Author  : Ian Nandhra
   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 _rup_h
  38 #define _rup_h 1
  39
  40 #ifdef SCCS_LABELS
  41 #ifndef lint
  42 /* static char *_rio_rup_h_sccs = "@(#)rup.h    1.5"; */
  43 #endif
  44 #endif
  45
  46 #if defined( HOST ) || defined( INKERNEL )
  47 #define MAX_RUP          ((short) 16)
  48 #endif
  49 #ifdef RTA
  50 #define MAX_RUP          ((short) 1)
  51 #endif
  52
  53 #define PKTS_PER_RUP     ((short) 2)     /* They are always used in pairs */
  54
  55 /*************************************************
  56  * Define all the  packet request stuff
  57  ************************************************/
  58 #define TX_RUP_INACTIVE          0        /* Nothing to transmit */
  59 #define TX_PACKET_READY          1        /* Transmit packet ready */
  60 #define TX_LOCK_RUP              2        /* Transmit side locked */
  61
  62 #define RX_RUP_INACTIVE          0        /* Nothing received */
  63 #define RX_PACKET_READY          1        /* Packet received */
  64
  65 #define RUP_NO_OWNER             0xff     /* RUP not owned by any process */
  66
  67 struct RUP {
  68              PKT_ptr    txpkt;            /* Outgoing packet */
  69              PKT_ptr    rxpkt;            /* Incoming packet */
  70              WORD       link;             /* Which link to send down? */
  71              BYTE       rup_dest_unit[2]; /* Destination unit */
  72              WORD       handshake;        /* For handshaking */
  73              WORD       timeout;          /* Timeout */
  74              WORD       status;           /* Status */
  75              WORD       txcontrol;        /* Transmit control */
  76              WORD       rxcontrol;        /* Receive control */
  77            };
  78
  79 #endif
  80
  81 /*********** end of file ***********/
  82