From 2fa9eb035ff38b1173d59f13c9a08b74c9de7d59 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 29 Nov 2008 01:34:33 +0000 Subject: [PATCH] madwifi: improve automatic channel selection by taking idle airtime into account SVN-Revision: 13420 --- package/madwifi/patches/389-autochannel.patch | 119 ++++++++++++++++++ .../madwifi/patches/406-monitor_r3711.patch | 4 +- .../madwifi/patches/408-changeset_r3337.patch | 2 +- package/madwifi/patches/450-new_hal.patch | 4 +- 4 files changed, 124 insertions(+), 5 deletions(-) create mode 100644 package/madwifi/patches/389-autochannel.patch diff --git a/package/madwifi/patches/389-autochannel.patch b/package/madwifi/patches/389-autochannel.patch new file mode 100644 index 0000000000..8e5a62dafc --- /dev/null +++ b/package/madwifi/patches/389-autochannel.patch @@ -0,0 +1,119 @@ +--- a/ath/if_ath.c ++++ b/ath/if_ath.c +@@ -384,6 +384,7 @@ static u_int32_t ath_get_real_maxtxpower + + static void ath_poll_disable(struct net_device *dev); + static void ath_poll_enable(struct net_device *dev); ++static void ath_fetch_idle_time(struct ath_softc *sc); + + /* calibrate every 30 secs in steady state but check every second at first. */ + static int ath_calinterval = ATH_SHORT_CALINTERVAL; +@@ -2579,6 +2580,7 @@ ath_init(struct net_device *dev) + * be followed by initialization of the appropriate bits + * and then setup of the interrupt mask. + */ ++ ath_fetch_idle_time(sc); + sc->sc_curchan.channel = ic->ic_curchan->ic_freq; + sc->sc_curchan.channelFlags = ath_chan2flags(ic->ic_curchan); + if (!ath_hal_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_FALSE, &status)) { +@@ -2913,6 +2915,34 @@ ath_hw_check_atim(struct ath_softc *sc, + } + + ++#define AR5K_RXCLEAR 0x80f4 ++#define AR5K_CYCLES 0x80f8 ++static void ++ath_fetch_idle_time(struct ath_softc *sc) ++{ ++ struct ieee80211com *ic = &sc->sc_ic; ++ struct ath_hal *ah = sc->sc_ah; ++ u_int32_t cc, rx; ++ u_int32_t time = 0; ++ ++ if (sc->sc_ah->ah_macType < 5212) ++ return; ++ ++ rx = OS_REG_READ(ah, AR5K_RXCLEAR); ++ cc = OS_REG_READ(ah, AR5K_CYCLES); ++ if (rx > cc) ++ return; /* wraparound */ ++ ++ if (sc->sc_last_chan) ++ sc->sc_last_chan->ic_idletime = 100 * (cc - rx) / cc; ++ sc->sc_last_chan = ic->ic_curchan; ++ ++ OS_REG_WRITE(ah, AR5K_RXCLEAR, 0); ++ OS_REG_WRITE(ah, AR5K_CYCLES, 0); ++} ++#undef AR5K_RXCLEAR ++#undef AR5K_CYCLES ++ + /* + * Reset the hardware w/o losing operational state. This is + * basically a more efficient way of doing ath_stop, ath_init, +@@ -2939,6 +2969,7 @@ ath_reset(struct net_device *dev) + * Convert to a HAL channel description with the flags + * constrained to reflect the current operating mode. + */ ++ ath_fetch_idle_time(sc); + c = ic->ic_curchan; + sc->sc_curchan.channel = c->ic_freq; + sc->sc_curchan.channelFlags = ath_chan2flags(c); +@@ -9019,6 +9050,7 @@ ath_chan_set(struct ath_softc *sc, struc + u_int8_t channel_change_required = 0; + struct timeval tv; + ++ ath_fetch_idle_time(sc); + /* + * Convert to a HAL channel description with + * the flags constrained to reflect the current +--- a/ath/if_athvar.h ++++ b/ath/if_athvar.h +@@ -773,6 +773,7 @@ struct ath_softc { + struct ieee80211vap **sc_bslot; /* beacon xmit slots */ + int sc_bnext; /* next slot for beacon xmit */ + ++ struct ieee80211_channel *sc_last_chan; + int sc_beacon_cal; /* use beacon timer for calibration */ + u_int64_t sc_lastcal; /* last time the calibration was performed */ + struct timer_list sc_cal_ch; /* calibration timer */ +--- a/net80211/_ieee80211.h ++++ b/net80211/_ieee80211.h +@@ -148,6 +148,7 @@ struct ieee80211_channel { + int8_t ic_maxpower; /* maximum tx power in dBm */ + int8_t ic_minpower; /* minimum tx power in dBm */ + u_int8_t ic_scanflags; ++ u_int8_t ic_idletime; /* phy idle time in % */ + }; + + #define IEEE80211_CHAN_MAX 255 +--- a/net80211/ieee80211_scan_ap.c ++++ b/net80211/ieee80211_scan_ap.c +@@ -423,6 +423,19 @@ pc_cmp_rssi(struct ap_state *as, struct + + /* This function must be invoked with locks acquired */ + static int ++pc_cmp_idletime(struct ieee80211_channel *a, ++ struct ieee80211_channel *b) ++{ ++ if (!a->ic_idletime || !b->ic_idletime) ++ return 0; ++ ++ /* a is better than b (return < 0) when a has more idle time than b */ ++ return b->ic_idletime - a->ic_idletime; ++} ++ ++ ++/* This function must be invoked with locks acquired */ ++static int + pc_cmp_samechan(struct ieee80211com *ic, struct ieee80211_channel *a, + struct ieee80211_channel *b) + { +@@ -455,6 +468,7 @@ pc_cmp(const void *_a, const void *_b) + return res; \ + } while (0) + ++ EVALUATE_CRITERION(idletime, a, b); + EVALUATE_CRITERION(radar, a, b); + EVALUATE_CRITERION(keepmode, params, a, b); + EVALUATE_CRITERION(sc, ic, a, b); diff --git a/package/madwifi/patches/406-monitor_r3711.patch b/package/madwifi/patches/406-monitor_r3711.patch index aed68c9104..5eef3fd6cd 100644 --- a/package/madwifi/patches/406-monitor_r3711.patch +++ b/package/madwifi/patches/406-monitor_r3711.patch @@ -1,6 +1,6 @@ --- a/ath/if_ath.c +++ b/ath/if_ath.c -@@ -6473,7 +6473,7 @@ ath_capture(struct net_device *dev, cons +@@ -6504,7 +6504,7 @@ ath_capture(struct net_device *dev, cons /* Never copy the SKB, as it is ours on the RX side, and this is the * last process on the TX side and we only modify our own headers. */ @@ -9,7 +9,7 @@ if (tskb == NULL) { DPRINTF(sc, ATH_DEBUG_ANY, "Dropping; ath_skb_removepad failed!\n"); -@@ -6481,6 +6481,8 @@ ath_capture(struct net_device *dev, cons +@@ -6512,6 +6512,8 @@ ath_capture(struct net_device *dev, cons } ieee80211_input_monitor(ic, tskb, bf, tx, tsf, sc); diff --git a/package/madwifi/patches/408-changeset_r3337.patch b/package/madwifi/patches/408-changeset_r3337.patch index dd4d5230c3..1297d5f8e2 100644 --- a/package/madwifi/patches/408-changeset_r3337.patch +++ b/package/madwifi/patches/408-changeset_r3337.patch @@ -10,7 +10,7 @@ Please let us know if you think your name should be mentioned here! --- a/ath/if_ath.c +++ b/ath/if_ath.c -@@ -3092,7 +3092,7 @@ ath_tx_startraw(struct net_device *dev, +@@ -3123,7 +3123,7 @@ ath_tx_startraw(struct net_device *dev, struct ath_softc *sc = dev->priv; struct ath_hal *ah = sc->sc_ah; struct ieee80211_phy_params *ph = (struct ieee80211_phy_params *) diff --git a/package/madwifi/patches/450-new_hal.patch b/package/madwifi/patches/450-new_hal.patch index 778f6da258..5c37125083 100644 --- a/package/madwifi/patches/450-new_hal.patch +++ b/package/madwifi/patches/450-new_hal.patch @@ -93,7 +93,7 @@ * The functions in this section are not intended to be invoked by MadWifi --- a/ath/if_ath.c +++ b/ath/if_ath.c -@@ -605,6 +605,14 @@ ath_attach(u_int16_t devid, struct net_d +@@ -606,6 +606,14 @@ ath_attach(u_int16_t devid, struct net_d } sc->sc_ah = ah; @@ -108,7 +108,7 @@ /* * Check if the MAC has multi-rate retry support. * We do this by trying to setup a fake extended -@@ -7487,7 +7495,7 @@ ath_txq_setup(struct ath_softc *sc, int +@@ -7518,7 +7526,7 @@ ath_txq_setup(struct ath_softc *sc, int if (qtype == HAL_TX_QUEUE_UAPSD) qi.tqi_qflags = HAL_TXQ_TXDESCINT_ENABLE; else -- 2.30.2