include/net/irda/qos.h

   1 /*********************************************************************
   2  *
   3  * Filename:      qos.h
   4  * Version:       1.0
   5  * Description:   Quality of Service definitions
   6  * Status:        Experimental.
   7  * Author:        Dag Brattli <dagb@cs.uit.no>
   8  * Created at:    Fri Sep 19 23:21:09 1997
   9  * Modified at:   Thu Dec  2 13:51:54 1999
  10  * Modified by:   Dag Brattli <dagb@cs.uit.no>
  11  *
  12  *     Copyright (c) 1999 Dag Brattli, All Rights Reserved.
  13  *
  14  *     This program is free software; you can redistribute it and/or
  15  *     modify it under the terms of the GNU General Public License as
  16  *     published by the Free Software Foundation; either version 2 of
  17  *     the License, or (at your option) any later version.
  18  *
  19  *     This program is distributed in the hope that it will be useful,
  20  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  22  *     GNU General Public License for more details.
  23  *
  24  *     You should have received a copy of the GNU General Public License
  25  *     along with this program; if not, write to the Free Software
  26  *     Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27  *     MA 02111-1307 USA
  28  *
  29  ********************************************************************/
  30
  31 #ifndef IRDA_QOS_H
  32 #define IRDA_QOS_H
  33
  34 #include <linux/config.h>
  35 #include <linux/skbuff.h>
  36
  37 #include <net/irda/parameters.h>
  38
  39 #define PI_BAUD_RATE     0x01
  40 #define PI_MAX_TURN_TIME 0x82
  41 #define PI_DATA_SIZE     0x83
  42 #define PI_WINDOW_SIZE   0x84
  43 #define PI_ADD_BOFS      0x85
  44 #define PI_MIN_TURN_TIME 0x86
  45 #define PI_LINK_DISC     0x08
  46
  47 #define IR_115200_MAX 0x3f
  48
  49 /* Baud rates (first byte) */
  50 #define IR_2400     0x01
  51 #define IR_9600     0x02
  52 #define IR_19200    0x04
  53 #define IR_38400    0x08
  54 #define IR_57600    0x10
  55 #define IR_115200   0x20
  56 #define IR_576000   0x40
  57 #define IR_1152000  0x80
  58
  59 /* Baud rates (second byte) */
  60 #define IR_4000000  0x01
  61 #define IR_16000000 0x02
  62
  63 /* Quality of Service information */
  64 typedef struct {
  65         __u32 value;
  66         __u16 bits; /* LSB is first byte, MSB is second byte */
  67 } qos_value_t;
  68
  69 struct qos_info {
  70         magic_t magic;
  71
  72         qos_value_t baud_rate;       /* IR_11520O | ... */
  73         qos_value_t max_turn_time;
  74         qos_value_t data_size;
  75         qos_value_t window_size;
  76         qos_value_t additional_bofs;
  77         qos_value_t min_turn_time;
  78         qos_value_t link_disc_time;
  79
  80         qos_value_t power;
  81 };
  82
  83 extern int sysctl_max_baud_rate;
  84 extern int sysctl_max_inactive_time;
  85
  86 void irda_init_max_qos_capabilies(struct qos_info *qos);
  87 void irda_qos_compute_intersection(struct qos_info *, struct qos_info *);
  88
  89 __u32 irlap_max_line_capacity(__u32 speed, __u32 max_turn_time);
  90
  91 void irda_qos_bits_to_value(struct qos_info *qos);
  92
  93 /* So simple, how could we not inline those two ?
  94  * Note : one byte is 10 bits if you include start and stop bits
  95  * Jean II */
  96 #define irlap_min_turn_time_in_bytes(speed, min_turn_time) (    \
  97         speed * min_turn_time / 10000000                        \
  98 )
  99 #define irlap_xbofs_in_usec(speed, xbofs) (                     \
 100         xbofs * 10000000 / speed                                \
 101 )
 102
 103 #endif
 104