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2c0d8db912
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@2721 0192ed92-7a03-0410-a25b-9323aeb14dbd
159 lines
6.1 KiB
C
159 lines
6.1 KiB
C
/*-
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* Copyright (c) 2004 Sam Leffler, Errno Consulting
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* Copyright (c) 2004 Video54 Technologies, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id: if_athrate.h 1667 2006-07-04 10:23:35Z kelmo $
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*/
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#ifndef _ATH_RATECTRL_H_
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#define _ATH_RATECTRL_H_
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/*
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* Interface definitions for transmit rate control modules for the
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* Atheros driver.
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*
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* A rate control module is responsible for choosing the transmit rate
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* for each data frame. Management+control frames are always sent at
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* a fixed rate.
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*
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* An instance of the rate control module is attached to each device
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* at attach time and detached when the device is destroyed. The module
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* may associate data with each device and each node (station). Both
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* sets of storage are opaque except for the size of the per-node storage
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* which must be provided when the module is attached.
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*
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* The rate control module is notified for each state transition and
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* station association/reassociation. Otherwise it is queried for a
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* rate for each outgoing frame and provided status from each transmitted
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* frame. Any ancillary processing is the responsibility of the module
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* (e.g. if periodic processing is required then the module should setup
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* its own timer).
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*
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* In addition to the transmit rate for each frame, the module must also
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* indicate the number of attempts to make at the specified rate. If this
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* number is != ATH_TXMAXTRY, an additional callback is made to request
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* 3 additional rate/retry pairs.
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*/
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enum {
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IEEE80211_RATE_AMRR,
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IEEE80211_RATE_MINSTREL,
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IEEE80211_RATE_ONOE,
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IEEE80211_RATE_SAMPLE,
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IEEE80211_RATE_MAX
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};
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struct ath_softc;
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struct ath_node;
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struct ath_buf;
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struct ieee80211vap;
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/* Multi-rare retry: 3 additional rate/retry pairs */
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struct ieee80211_mrr {
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int rate1;
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int retries1;
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int rate2;
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int retries2;
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int rate3;
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int retries3;
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};
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struct ieee80211_rate_ops {
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int ratectl_id;
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/* Attach/detach a rate control module */
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struct ath_ratectrl *(*attach)(struct ath_softc *sc);
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void (*detach)(struct ath_ratectrl *arc);
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/* Register proc entries with a VAP */
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void (*dynamic_proc_register)(struct ieee80211vap *vap);
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/* *** State storage handling *** */
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/* Initialize per-node state already allocated for the specified
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* node; this space can be assumed initialized to zero */
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void (*node_init)(struct ath_softc *sc, struct ath_node *an);
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/* Cleanup any per-node state prior to the node being reclaimed */
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void (*node_cleanup)(struct ath_softc *sc, struct ath_node *an);
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/* Update rate control state on station associate/reassociate
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* (when operating as an ap or for nodes discovered when operating
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* in ibss mode) */
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void (*newassoc)(struct ath_softc *sc, struct ath_node *an,
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int isnew);
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/* Update/reset rate control state for 802.11 state transitions.
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* Important mostly as the analog to newassoc when operating
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* in station mode */
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void (*newstate)(struct ieee80211vap *vap,
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enum ieee80211_state state);
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/* *** Transmit handling *** */
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/* Return the transmit info for a data packet. If multi-rate state
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* is to be setup then try0 should contain a value other than ATH_TXMAXTRY
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* and setupxtxdesc will be called after deciding if the frame
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* can be transmitted with multi-rate retry. */
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void (*findrate)(struct ath_softc *sc, struct ath_node *an,
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int shortPreamble, size_t frameLen,
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u_int8_t *rix, unsigned int *try0, u_int8_t *txrate);
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/* Return 3 more rates to try and corresponding number of retries.
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* The rate index returned by findrate is passed back in. */
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void (*get_mrr)(struct ath_softc *sc, struct ath_node *an,
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int shortPreamble, size_t frame_size, u_int8_t rix,
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struct ieee80211_mrr *mrr);
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/* Update rate control state for a packet associated with the
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* supplied transmit descriptor. The routine is invoked both
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* for packets that were successfully sent and for those that
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* failed (consult the descriptor for details). */
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void (*tx_complete)(struct ath_softc *sc, struct ath_node *an,
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const struct ath_buf *bf);
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};
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struct ath_ratectrl {
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struct ieee80211_rate_ops *ops;
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size_t arc_space; /* space required for per-node state */
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size_t arc_vap_space; /* space required for per-vap state */
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};
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int ieee80211_rate_register(struct ieee80211_rate_ops *ops);
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void ieee80211_rate_unregister(struct ieee80211_rate_ops *ops);
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struct ath_ratectrl *ieee80211_rate_attach(struct ath_softc *sc, const char *name);
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void ieee80211_rate_detach(struct ath_ratectrl *);
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#endif /* _ATH_RATECTRL_H_ */
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