linux/drivers/net/wireless/ath/ath9k/beacon.c

/*
 * Copyright (c) 2008-2011 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/dma-mapping.h>
#include "ath9k.h"

#define FUDGE …

static void ath9k_reset_beacon_status(struct ath_softc *sc)
{ … }

/*
 *  This function will modify certain transmit queue properties depending on
 *  the operating mode of the station (AP or AdHoc).  Parameters are AIFS
 *  settings and channel width min/max
*/
static void ath9k_beaconq_config(struct ath_softc *sc)
{ … }

/*
 *  Associates the beacon frame buffer with a transmit descriptor.  Will set
 *  up rate codes, and channel flags. Beacons are always sent out at the
 *  lowest rate, and are not retried.
*/
static void ath9k_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif,
			     struct ath_buf *bf, int rateidx)
{ … }

static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw,
					     struct ieee80211_vif *vif)
{ … }

void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
{ … }

void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
{ … }

void ath9k_beacon_ensure_primary_slot(struct ath_softc *sc)
{ … }

static int ath9k_beacon_choose_slot(struct ath_softc *sc)
{ … }

static void ath9k_set_tsfadjust(struct ath_softc *sc,
				struct ath_beacon_config *cur_conf)
{ … }

bool ath9k_csa_is_finished(struct ath_softc *sc, struct ieee80211_vif *vif)
{ … }

static void ath9k_csa_update_vif(void *data, u8 *mac, struct ieee80211_vif *vif)
{ … }

void ath9k_csa_update(struct ath_softc *sc)
{ … }

void ath9k_beacon_tasklet(struct tasklet_struct *t)
{ … }

/*
 * Both nexttbtt and intval have to be in usecs.
 */
static void ath9k_beacon_init(struct ath_softc *sc, u32 nexttbtt,
			      u32 intval)
{ … }

static void ath9k_beacon_stop(struct ath_softc *sc)
{ … }

/*
 * For multi-bss ap support beacons are either staggered evenly over N slots or
 * burst together.  For the former arrange for the SWBA to be delivered for each
 * slot. Slots that are not occupied will generate nothing.
 */
static void ath9k_beacon_config_ap(struct ath_softc *sc,
				   struct ath_beacon_config *conf)
{ … }

static void ath9k_beacon_config_sta(struct ath_hw *ah,
				    struct ath_beacon_config *conf)
{ … }

static void ath9k_beacon_config_adhoc(struct ath_softc *sc,
				      struct ath_beacon_config *conf)
{ … }

static void ath9k_cache_beacon_config(struct ath_softc *sc,
				      struct ath_chanctx *ctx,
				      struct ieee80211_vif *vif)
{ … }

void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *main_vif,
			 bool beacons)
{ … }

void ath9k_set_beacon(struct ath_softc *sc)
{ … }