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126 lines
3.9 KiB
Diff
126 lines
3.9 KiB
Diff
--- a/ath/if_ath.c
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+++ b/ath/if_ath.c
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@@ -384,6 +384,7 @@ static u_int32_t ath_get_real_maxtxpower
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static void ath_poll_disable(struct net_device *dev);
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static void ath_poll_enable(struct net_device *dev);
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+static void ath_fetch_idle_time(struct ath_softc *sc);
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/* calibrate every 30 secs in steady state but check every second at first. */
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static int ath_calinterval = ATH_SHORT_CALINTERVAL;
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@@ -2580,6 +2581,7 @@ ath_init(struct net_device *dev)
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* be followed by initialization of the appropriate bits
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* and then setup of the interrupt mask.
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*/
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+ ath_fetch_idle_time(sc);
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sc->sc_curchan.channel = ic->ic_curchan->ic_freq;
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sc->sc_curchan.channelFlags = ath_chan2flags(ic->ic_curchan);
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if (!ath_hal_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_FALSE, &status)) {
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@@ -2914,6 +2916,40 @@ ath_hw_check_atim(struct ath_softc *sc,
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}
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+#define AR5K_RXCLEAR 0x80f4
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+#define AR5K_CYCLES 0x80f8
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+static void
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+ath_fetch_idle_time(struct ath_softc *sc)
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+{
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+ struct ieee80211com *ic = &sc->sc_ic;
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+ struct ath_hal *ah = sc->sc_ah;
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+ u_int32_t cc, rx;
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+ u_int32_t time = 0;
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+
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+ if (sc->sc_ah->ah_macType < 5212)
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+ return;
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+
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+ if (!ic->ic_curchan || (ic->ic_curchan == IEEE80211_CHAN_ANYC))
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+ return;
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+
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+ rx = OS_REG_READ(ah, AR5K_RXCLEAR);
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+ cc = OS_REG_READ(ah, AR5K_CYCLES);
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+ if (!cc)
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+ return;
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+
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+ if (rx > cc)
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+ return; /* wraparound */
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+
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+ if (sc->sc_last_chan)
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+ sc->sc_last_chan->ic_idletime = 100 * (cc - rx) / cc;
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+ sc->sc_last_chan = ic->ic_curchan;
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+
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+ OS_REG_WRITE(ah, AR5K_RXCLEAR, 0);
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+ OS_REG_WRITE(ah, AR5K_CYCLES, 0);
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+}
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+#undef AR5K_RXCLEAR
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+#undef AR5K_CYCLES
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+
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/*
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* Reset the hardware w/o losing operational state. This is
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* basically a more efficient way of doing ath_stop, ath_init,
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@@ -2940,6 +2976,7 @@ ath_reset(struct net_device *dev)
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* Convert to a HAL channel description with the flags
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* constrained to reflect the current operating mode.
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*/
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+ ath_fetch_idle_time(sc);
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c = ic->ic_curchan;
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sc->sc_curchan.channel = c->ic_freq;
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sc->sc_curchan.channelFlags = ath_chan2flags(c);
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@@ -9020,6 +9057,7 @@ ath_chan_set(struct ath_softc *sc, struc
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u_int8_t channel_change_required = 0;
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struct timeval tv;
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+ ath_fetch_idle_time(sc);
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/*
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* Convert to a HAL channel description with
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* the flags constrained to reflect the current
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--- a/ath/if_athvar.h
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+++ b/ath/if_athvar.h
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@@ -773,6 +773,7 @@ struct ath_softc {
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struct ieee80211vap **sc_bslot; /* beacon xmit slots */
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int sc_bnext; /* next slot for beacon xmit */
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+ struct ieee80211_channel *sc_last_chan;
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int sc_beacon_cal; /* use beacon timer for calibration */
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u_int64_t sc_lastcal; /* last time the calibration was performed */
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struct timer_list sc_cal_ch; /* calibration timer */
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--- a/net80211/_ieee80211.h
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+++ b/net80211/_ieee80211.h
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@@ -148,6 +148,7 @@ struct ieee80211_channel {
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int8_t ic_maxpower; /* maximum tx power in dBm */
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int8_t ic_minpower; /* minimum tx power in dBm */
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u_int8_t ic_scanflags;
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+ u_int8_t ic_idletime; /* phy idle time in % */
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};
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#define IEEE80211_CHAN_MAX 255
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--- a/net80211/ieee80211_scan_ap.c
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+++ b/net80211/ieee80211_scan_ap.c
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@@ -423,6 +423,19 @@ pc_cmp_rssi(struct ap_state *as, struct
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/* This function must be invoked with locks acquired */
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static int
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+pc_cmp_idletime(struct ieee80211_channel *a,
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+ struct ieee80211_channel *b)
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+{
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+ if (!a->ic_idletime || !b->ic_idletime)
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+ return 0;
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+
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+ /* a is better than b (return < 0) when a has more idle time than b */
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+ return b->ic_idletime - a->ic_idletime;
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+}
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+
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+
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+/* This function must be invoked with locks acquired */
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+static int
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pc_cmp_samechan(struct ieee80211com *ic, struct ieee80211_channel *a,
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struct ieee80211_channel *b)
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{
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@@ -457,6 +470,7 @@ pc_cmp(const void *_a, const void *_b)
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EVALUATE_CRITERION(radar, a, b);
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EVALUATE_CRITERION(keepmode, params, a, b);
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+ EVALUATE_CRITERION(idletime, a, b);
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EVALUATE_CRITERION(sc, ic, a, b);
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/* XXX: rssi useless? pick_channel evaluates it anyway */
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EVALUATE_CRITERION(rssi, params->ss->ss_priv, a, b);
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