Differential D14731 Diff 40430 sys/dev/ath/ath_rate/amrr/amrr.c

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sys/dev/ath/ath_rate/amrr/amrr.c

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	}			}

	/*			/*
	* Set the starting transmit rate for a node.			* Set the starting transmit rate for a node.
	*/			*/
	static void			static void
	ath_rate_ctl_start(struct ath_softc sc, struct ieee80211_node ni)			ath_rate_ctl_start(struct ath_softc sc, struct ieee80211_node ni)
	{			{
	#define RATE(_ix) (ni->ni_rates.rs_rates[(_ix)] & IEEE80211_RATE_VAL)			#define RV(_ix) (ieee80211_get_rate(rs->rates[(_ix)].rs_index)->value)
	const struct ieee80211_txparam *tp = ni->ni_txparms;			const struct ieee80211_txparam_vht *tp = ni->ni_txparms;
				const struct ieee80211_rateset *rs = ni->ni_rates;
	int srate;			int srate;

	KASSERT(ni->ni_rates.rs_nrates > 0, ("no rates"));			KASSERT(rs->rs_nrates > 0, ("no rates"));
	if (tp == NULL \|\| tp->ucastrate == IEEE80211_FIXED_RATE_NONE) {
				srate = rs->rs_nrates - 1;
				if (tp == NULL \|\| tp->ucastrate == IEEE80211_RATE_NONEXISTENT) {
	/*			/*
	* No fixed rate is requested. For 11b start with			* No fixed rate is requested. For 11b start with
	* the highest negotiated rate; otherwise, for 11g			* the highest negotiated rate; otherwise, for 11g
	* and 11a, we start "in the middle" at 24Mb or 36Mb.			* and 11a, we start "in the middle" at 24Mb or 36Mb.
	*/			*/
	srate = ni->ni_rates.rs_nrates - 1;
	if (sc->sc_curmode != IEEE80211_MODE_11B) {			if (sc->sc_curmode != IEEE80211_MODE_11B) {
	/*			/*
	* Scan the negotiated rate set to find the			* Scan the negotiated rate set to find the
	* closest rate.			* closest rate.
	*/			*/
	/* NB: the rate set is assumed sorted */			/* NB: the rate set is assumed sorted */
	for (; srate >= 0 && RATE(srate) > 72; srate--)			for (; srate >= 0 && RV(srate) > 72; srate--)
	;			;
	}			}
	} else {			} else {
	/*			/*
	* A fixed rate is to be used; ic_fixed_rate is the			* A fixed rate is to be used; ic_fixed_rate is the
	* IEEE code for this rate (sans basic bit). Convert this			* IEEE code for this rate (sans basic bit). Convert this
	* to the index into the negotiated rate set for			* to the index into the negotiated rate set for
	* the node. We know the rate is there because the			* the node. We know the rate is there because the
	* rate set is checked when the station associates.			* rate set is checked when the station associates.
	*/			*/
	/* NB: the rate set is assumed sorted */			/* NB: the rate set is assumed sorted */
	srate = ni->ni_rates.rs_nrates - 1;			for (; srate >= 0; srate--)
	for (; srate >= 0 && RATE(srate) != tp->ucastrate; srate--)			if (rs->rates[srate].rs_index == tp->ucastrate)
	;			break;
	}			}
	/*			/*
	* The selected rate may not be available due to races			* The selected rate may not be available due to races
	* and mode settings. Also orphaned nodes created in			* and mode settings. Also orphaned nodes created in
	* adhoc mode may not have any rate set so this lookup			* adhoc mode may not have any rate set so this lookup
	* can fail. This is not fatal.			* can fail. This is not fatal.
	*/			*/
	ath_rate_update(sc, ni, srate < 0 ? 0 : srate);			ath_rate_update(sc, ni, srate < 0 ? 0 : srate);
	#undef RATE			#undef RV
	}			}

	/*			/*
	* Examine and potentially adjust the transmit rate.			* Examine and potentially adjust the transmit rate.
	*/			*/
	static void			static void
	ath_rate_ctl(void arg, struct ieee80211_node ni)			ath_rate_ctl(void arg, struct ieee80211_node ni)
	{			{
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