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f87eba996b
rt2x00 uses the deprecated do_gettimeofday() function to get a timestamp for its debugfs "dump" file interface. The timestamp is using an unsigned 32-bit value, so we could make it work until 2106 by using ktime_get_real_ts64(), but it seems better to use monotonic times, as we normally want for timestamps. Since this is an interface change, I'm incrementing the DUMP_HEADER_VERSION number, so user space can figure out whether the timestamps are monotonic or not. Most likely the tools won't care either way. Generally speaking, ABI version numbers and in particular changing them is a bad idea. However since this is in debugfs, we don't put any API stability rules on the interface according to Documentation/filesystems/debugfs.txt, and we can take the easy way out here; anyone using the frame dump feature can probably work out the differences here. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
128 lines
4.2 KiB
C
128 lines
4.2 KiB
C
/*
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Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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Module: rt2x00dump
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Abstract:
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Data structures for the rt2x00debug & userspace.
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The declarations in this file can be used by both rt2x00
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and userspace and therefore should be kept together in
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this file.
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*/
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#ifndef RT2X00DUMP_H
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#define RT2X00DUMP_H
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/**
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* DOC: Introduction
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*
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* This header is intended to be exported to userspace,
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* to make the structures and enumerations available to userspace
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* applications. This means that all data types should be exportable.
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*
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* When rt2x00 is compiled with debugfs support enabled,
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* it is possible to capture all data coming in and out of the device
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* by reading the frame dump file. This file can have only a single reader.
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* The following frames will be reported:
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* - All incoming frames (rx)
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* - All outgoing frames (tx, including beacon and atim)
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* - All completed frames (txdone including atim)
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*
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* The data is send to the file using the following format:
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*
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* [rt2x00dump header][hardware descriptor][ieee802.11 frame]
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*
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* rt2x00dump header: The description of the dumped frame, as well as
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* additional information useful for debugging. See &rt2x00dump_hdr.
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* hardware descriptor: Descriptor that was used to receive or transmit
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* the frame.
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* ieee802.11 frame: The actual frame that was received or transmitted.
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*/
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/**
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* enum rt2x00_dump_type - Frame type
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*
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* These values are used for the @type member of &rt2x00dump_hdr.
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* @DUMP_FRAME_RXDONE: This frame has been received by the hardware.
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* @DUMP_FRAME_TX: This frame is queued for transmission to the hardware.
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* @DUMP_FRAME_TXDONE: This frame indicates the device has handled
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* the tx event which has either succeeded or failed. A frame
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* with this type should also have been reported with as a
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* %DUMP_FRAME_TX frame.
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* @DUMP_FRAME_BEACON: This beacon frame is queued for transmission to the
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* hardware.
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*/
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enum rt2x00_dump_type {
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DUMP_FRAME_RXDONE = 1,
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DUMP_FRAME_TX = 2,
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DUMP_FRAME_TXDONE = 3,
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DUMP_FRAME_BEACON = 4,
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};
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/**
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* struct rt2x00dump_hdr - Dump frame header
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*
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* Each frame dumped to the debugfs file starts with this header
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* attached. This header contains the description of the actual
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* frame which was dumped.
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*
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* New fields inside the structure must be appended to the end of
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* the structure. This way userspace tools compiled for earlier
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* header versions can still correctly handle the frame dump
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* (although they will not handle all data passed to them in the dump).
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*
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* @version: Header version should always be set to %DUMP_HEADER_VERSION.
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* This field must be checked by userspace to determine if it can
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* handle this frame.
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* @header_length: The length of the &rt2x00dump_hdr structure. This is
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* used for compatibility reasons so userspace can easily determine
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* the location of the next field in the dump.
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* @desc_length: The length of the device descriptor.
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* @data_length: The length of the frame data (including the ieee802.11 header.
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* @chip_rt: RT chipset
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* @chip_rf: RF chipset
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* @chip_rev: Chipset revision
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* @type: The frame type (&rt2x00_dump_type)
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* @queue_index: The index number of the data queue.
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* @entry_index: The index number of the entry inside the data queue.
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* @timestamp_sec: Timestamp - seconds
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* @timestamp_usec: Timestamp - microseconds
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*/
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struct rt2x00dump_hdr {
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__le32 version;
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#define DUMP_HEADER_VERSION 3
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__le32 header_length;
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__le32 desc_length;
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__le32 data_length;
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__le16 chip_rt;
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__le16 chip_rf;
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__le16 chip_rev;
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__le16 type;
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__u8 queue_index;
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__u8 entry_index;
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__le32 timestamp_sec;
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__le32 timestamp_usec;
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};
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#endif /* RT2X00DUMP_H */
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