drivers/net/wireless/rt2x00/rt2x00dump.h

   1 /*
   2         Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00dump
  23         Abstract: Data structures for the rt2x00debug & userspace.
  24  */
  25
  26 #ifndef RT2X00DUMP_H
  27 #define RT2X00DUMP_H
  28
  29 /**
  30  * DOC: Introduction
  31  *
  32  * This header is intended to be exported to userspace,
  33  * to make the structures and enumerations available to userspace
  34  * applications. This means that all data types should be exportable.
  35  *
  36  * When rt2x00 is compiled with debugfs support enabled,
  37  * it is possible to capture all data coming in and out of the device
  38  * by reading the frame dump file. This file can have only a single reader.
  39  * The following frames will be reported:
  40  *   - All incoming frames (rx)
  41  *   - All outgoing frames (tx, including beacon and atim)
  42  *   - All completed frames (txdone including atim)
  43  *
  44  * The data is send to the file using the following format:
  45  *
  46  *   [rt2x00dump header][hardware descriptor][ieee802.11 frame]
  47  *
  48  * rt2x00dump header: The description of the dumped frame, as well as
  49  *      additional information usefull for debugging. See &rt2x00dump_hdr.
  50  * hardware descriptor: Descriptor that was used to receive or transmit
  51  *      the frame.
  52  * ieee802.11 frame: The actual frame that was received or transmitted.
  53  */
  54
  55 /**
  56  * enum rt2x00_dump_type - Frame type
  57  *
  58  * These values are used for the @type member of &rt2x00dump_hdr.
  59  * @DUMP_FRAME_RXDONE: This frame has been received by the hardware.
  60  * @DUMP_FRAME_TX: This frame is queued for transmission to the hardware.
  61  * @DUMP_FRAME_TXDONE: This frame indicates the device has handled
  62  *      the tx event which has either succeeded or failed. A frame
  63  *      with this type should also have been reported with as a
  64  *      %DUMP_FRAME_TX frame.
  65  */
  66 enum rt2x00_dump_type {
  67         DUMP_FRAME_RXDONE = 1,
  68         DUMP_FRAME_TX = 2,
  69         DUMP_FRAME_TXDONE = 3,
  70 };
  71
  72 /**
  73  * struct rt2x00dump_hdr - Dump frame header
  74  *
  75  * Each frame dumped to the debugfs file starts with this header
  76  * attached. This header contains the description of the actual
  77  * frame which was dumped.
  78  *
  79  * New fields inside the structure must be appended to the end of
  80  * the structure. This way userspace tools compiled for earlier
  81  * header versions can still correctly handle the frame dump
  82  * (although they will not handle all data passed to them in the dump).
  83  *
  84  * @version: Header version should always be set to %DUMP_HEADER_VERSION.
  85  *      This field must be checked by userspace to determine if it can
  86  *      handle this frame.
  87  * @header_length: The length of the &rt2x00dump_hdr structure. This is
  88  *      used for compatibility reasons so userspace can easily determine
  89  *      the location of the next field in the dump.
  90  * @desc_length: The length of the device descriptor.
  91  * @data_length: The length of the frame data (including the ieee802.11 header.
  92  * @chip_rt: RT chipset
  93  * @chip_rf: RF chipset
  94  * @chip_rev: Chipset revision
  95  * @type: The frame type (&rt2x00_dump_type)
  96  * @queue_index: The index number of the data queue.
  97  * @entry_index: The index number of the entry inside the data queue.
  98  * @timestamp_sec: Timestamp - seconds
  99  * @timestamp_usec: Timestamp - microseconds
 100  */
 101 struct rt2x00dump_hdr {
 102         __le32 version;
 103 #define DUMP_HEADER_VERSION     2
 104
 105         __le32 header_length;
 106         __le32 desc_length;
 107         __le32 data_length;
 108
 109         __le16 chip_rt;
 110         __le16 chip_rf;
 111         __le32 chip_rev;
 112
 113         __le16 type;
 114         __u8 queue_index;
 115         __u8 entry_index;
 116
 117         __le32 timestamp_sec;
 118         __le32 timestamp_usec;
 119 };
 120
 121 #endif /* RT2X00DUMP_H */