rt2x00: Add missing rt2x00dump.h file

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+/*
+	Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
+	<http://rt2x00.serialmonkey.com>
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the
+	Free Software Foundation, Inc.,
+	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+	Module: rt2x00dump
+	Abstract: Data structures for the rt2x00debug & userspace.
+ */
+
+#ifndef RT2X00DUMP_H
+#define RT2X00DUMP_H
+
+/**
+ * DOC: Introduction
+ *
+ * This header is intended to be exported to userspace,
+ * to make the structures and enumerations available to userspace
+ * applications. This means that all data types should be exportable.
+ *
+ * When rt2x00 is compiled with debugfs support enabled,
+ * it is possible to capture all data coming in and out of the device
+ * by reading the frame dump file. This file can have only a single reader.
+ * The following frames will be reported:
+ *   - All incoming frames (rx)
+ *   - All outgoing frames (tx, including beacon and atim)
+ *   - All completed frames (txdone including atim)
+ *
+ * The data is send to the file using the following format:
+ *
+ *   [rt2x00dump header][hardware descriptor][ieee802.11 frame]
+ *
+ * rt2x00dump header: The description of the dumped frame, as well as
+ *	additional information usefull for debugging. See &rt2x00dump_hdr.
+ * hardware descriptor: Descriptor that was used to receive or transmit
+ *	the frame.
+ * ieee802.11 frame: The actual frame that was received or transmitted.
+ */
+
+/**
+ * enum rt2x00_dump_type - Frame type
+ *
+ * These values are used for the @type member of &rt2x00dump_hdr.
+ * @DUMP_FRAME_RXDONE: This frame has been received by the hardware.
+ * @DUMP_FRAME_TX: This frame is queued for transmission to the hardware.
+ * @DUMP_FRAME_TXDONE: This frame indicates the device has handled
+ *	the tx event which has either succeeded or failed. A frame
+ *	with this type should also have been reported with as a
+ *	%DUMP_FRAME_TX frame.
+ */
+enum rt2x00_dump_type {
+	DUMP_FRAME_RXDONE = 1,
+	DUMP_FRAME_TX = 2,
+	DUMP_FRAME_TXDONE = 3,
+};
+
+/**
+ * struct rt2x00dump_hdr - Dump frame header
+ *
+ * Each frame dumped to the debugfs file starts with this header
+ * attached. This header contains the description of the actual
+ * frame which was dumped.
+ *
+ * New fields inside the structure must be appended to the end of
+ * the structure. This way userspace tools compiled for earlier
+ * header versions can still correctly handle the frame dump
+ * (although they will not handle all data passed to them in the dump).
+ *
+ * @version: Header version should always be set to %DUMP_HEADER_VERSION.
+ *	This field must be checked by userspace to determine if it can
+ *	handle this frame.
+ * @header_length: The length of the &rt2x00dump_hdr structure. This is
+ *	used for compatibility reasons so userspace can easily determine
+ *	the location of the next field in the dump.
+ * @desc_length: The length of the device descriptor.
+ * @data_length: The length of the frame data (including the ieee802.11 header.
+ * @chip_rt: RT chipset
+ * @chip_rf: RF chipset
+ * @chip_rev: Chipset revision
+ * @type: The frame type (&rt2x00_dump_type)
+ * @ring_index: The index number of the data ring.
+ * @entry_index: The index number of the entry inside the data ring.
+ * @timestamp_sec: Timestamp - seconds
+ * @timestamp_usec: Timestamp - microseconds
+ */
+struct rt2x00dump_hdr {
+	__le32 version;
+#define DUMP_HEADER_VERSION	2
+
+	__le32 header_length;
+	__le32 desc_length;
+	__le32 data_length;
+
+	__le16 chip_rt;
+	__le16 chip_rf;
+	__le32 chip_rev;
+
+	__le16 type;
+	__u8 ring_index;
+	__u8 entry_index;
+
+	__le32 timestamp_sec;
+	__le32 timestamp_usec;
+};
+
+#endif /* RT2X00DUMP_H */