/* calibrate every 30 secs in steady state but check every second at first. */
static int ath_calinterval = ATH_SHORT_CALINTERVAL;
-@@ -2580,6 +2581,7 @@ ath_init(struct net_device *dev)
+@@ -2581,6 +2582,7 @@ ath_init(struct net_device *dev)
* be followed by initialization of the appropriate bits
* and then setup of the interrupt mask.
*/
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)) {
-@@ -2914,6 +2916,40 @@ ath_hw_check_atim(struct ath_softc *sc,
+@@ -2914,6 +2916,48 @@ ath_hw_check_atim(struct ath_softc *sc,
+ return 0;
}
-
++#define AR5K_MIBC 0x0040
++#define AR5K_MIBC_FREEZE (1 << 1)
++#define AR5K_TXFC 0x80ec
++#define AR5K_RXFC 0x80f0
+#define AR5K_RXCLEAR 0x80f4
+#define AR5K_CYCLES 0x80f8
+static void
+ if (!ic->ic_curchan || (ic->ic_curchan == IEEE80211_CHAN_ANYC))
+ return;
+
++ OS_REG_WRITE(ah, AR5K_MIBC, AR5K_MIBC_FREEZE);
+ rx = OS_REG_READ(ah, AR5K_RXCLEAR);
+ cc = OS_REG_READ(ah, AR5K_CYCLES);
++
+ if (!cc)
+ return;
+
+ if (rx > cc)
-+ return; /* wraparound */
++ return; /* should not happen */
+
+ if (sc->sc_last_chan)
+ sc->sc_last_chan->ic_idletime = 100 * (cc - rx) / cc;
+
+ OS_REG_WRITE(ah, AR5K_RXCLEAR, 0);
+ OS_REG_WRITE(ah, AR5K_CYCLES, 0);
++ OS_REG_WRITE(ah, AR5K_TXFC, 0);
++ OS_REG_WRITE(ah, AR5K_RXFC, 0);
++ OS_REG_WRITE(ah, AR5K_MIBC, 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,
-@@ -2940,6 +2976,7 @@ ath_reset(struct net_device *dev)
+@@ -2941,6 +2985,7 @@ ath_reset(struct net_device *dev)
* Convert to a HAL channel description with the flags
* constrained to reflect the current operating mode.
*/
c = ic->ic_curchan;
sc->sc_curchan.channel = c->ic_freq;
sc->sc_curchan.channelFlags = ath_chan2flags(c);
-@@ -9022,6 +9059,7 @@ ath_chan_set(struct ath_softc *sc, struc
+@@ -9023,6 +9068,7 @@ 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
+@@ -9031,6 +9077,14 @@ ath_chan_set(struct ath_softc *sc, struc
+ memset(&hchan, 0, sizeof(HAL_CHANNEL));
+ hchan.channel = chan->ic_freq;
+ hchan.channelFlags = ath_chan2flags(chan);
++
++ /* don't do duplicate channel changes, but do
++ * store the available idle time */
++ ath_fetch_idle_time(sc);
++ if ((sc->sc_curchan.channel == hchan.channel) &&
++ (sc->sc_curchan.channelFlags == hchan.channelFlags))
++ return 0;
++
+ KASSERT(hchan.channel != 0,
+ ("bogus channel %u/0x%x", hchan.channel, hchan.channelFlags));
+ do_gettimeofday(&tv);
--- a/ath/if_athvar.h
+++ b/ath/if_athvar.h
-@@ -773,6 +773,7 @@ struct ath_softc {
+@@ -774,6 +774,7 @@ struct ath_softc {
struct ieee80211vap **sc_bslot; /* beacon xmit slots */
int sc_bnext; /* next slot for beacon xmit */
#define IEEE80211_CHAN_MAX 255
--- a/net80211/ieee80211_scan_ap.c
+++ b/net80211/ieee80211_scan_ap.c
-@@ -417,6 +417,19 @@ pc_cmp_rssi(struct ap_state *as, struct
+@@ -417,6 +417,19 @@ pc_cmp_rssi(struct ap_state *as, struct
/* This function must be invoked with locks acquired */
static int
EVALUATE_CRITERION(sc, ic, a, b);
/* XXX: rssi useless? pick_channel evaluates it anyway */
EVALUATE_CRITERION(rssi, params->ss->ss_priv, a, b);
+@@ -519,16 +533,9 @@ pick_channel(struct ieee80211_scan_state
+ #endif
+
+ best = NULL;
+- best_rssi = 0xff; /* If signal is bigger than 0xff, we'd be melting. */
+
+ for (i = 0; i < ss_last; i++) {
+ c = &chans[i];
+- benefit = best_rssi - as->as_maxrssi[c->chan->ic_ieee];
+- sta_assoc = ic->ic_sta_assoc;
+-
+- /* Don't switch... */
+- if (benefit <= 0)
+- continue;
+
+ /* Verify channel is not marked for non-occupancy */
+ if (IEEE80211_IS_CHAN_RADAR(c->chan))
+@@ -546,31 +553,8 @@ pick_channel(struct ieee80211_scan_state
+ break;
+ }
+
+- if (sta_assoc != 0) {
+- int sl = ic->ic_cn_total -
+- ic->ic_chan_nodes[c->chan->ic_ieee]; /* count */
+- if (ic->ic_sc_algorithm == IEEE80211_SC_LOOSE) {
+- int sl_max = ic->ic_sc_sldg * benefit;
+- sl = 1000 * sl / sta_assoc; /* permil */
+- IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
+- "%s: chan %d, dB gained: %d, "
+- "STAs lost: %d permil (max %d)\n",
+- __func__, c->chan->ic_ieee,
+- benefit, sl, sl_max);
+- if (sl > sl_max)
+- continue;
+- } else if (((ic->ic_sc_algorithm ==
+- IEEE80211_SC_TIGHT) ||
+- (ic->ic_sc_algorithm ==
+- IEEE80211_SC_STRICT)) &&
+- (sl > 0)) {
+- /* Break the loop as the subsequent chans
+- * won't be better. */
+- break;
+- }
+- }
+ best = c->chan;
+- best_rssi = as->as_maxrssi[best->ic_ieee];
++ break;
+ }
+
+ if (best != NULL) {
+@@ -599,6 +583,9 @@ ap_end(struct ieee80211_scan_state *ss,
+ ("wrong opmode %u", vap->iv_opmode));
+
+ ic = vap->iv_ic;
++
++ /* record stats for the channel that was scanned last */
++ ic->ic_set_channel(ic);
+ bestchan = pick_channel(ss, vap, flags);
+ if (bestchan == NULL) {
+ if (ss->ss_last > 0) {
+--- a/net80211/ieee80211_scan.c
++++ b/net80211/ieee80211_scan.c
+@@ -1002,20 +1002,34 @@ ieee80211_scan_add_channels(struct ieee8
+ {
+ struct ieee80211_channel *c, *cg;
+ u_int modeflags;
++ int has_non_turbo = 0;
+ int i;
+
+ KASSERT(mode < ARRAY_SIZE(chanflags), ("Unexpected mode %u", mode));
+ modeflags = chanflags[mode];
+ for (i = 0; i < ic->ic_nchans; i++) {
+ c = &ic->ic_channels[i];
++ if (c->ic_flags & (IEEE80211_CHAN_TURBO | IEEE80211_CHAN_STURBO))
++ continue;
++
++ has_non_turbo = 1;
++ break;
++ }
++ for (i = 0; i < ic->ic_nchans; i++) {
++ c = &ic->ic_channels[i];
+ if (c == NULL || isclr(ic->ic_chan_active, c->ic_ieee))
+ continue;
+ if (c->ic_scanflags & IEEE80211_NOSCAN_SET)
+ continue;
+- if (modeflags &&
+- ((c->ic_flags & IEEE80211_CHAN_ALLTURBO) !=
+- (modeflags & IEEE80211_CHAN_ALLTURBO)))
+- continue;
++ if (modeflags) {
++ if ((c->ic_flags & IEEE80211_CHAN_ALLTURBO) !=
++ (modeflags & IEEE80211_CHAN_ALLTURBO))
++ continue;
++ } else if (has_non_turbo) {
++ if ((ss->ss_vap->iv_opmode == IEEE80211_M_HOSTAP) &&
++ (c->ic_flags & (IEEE80211_CHAN_TURBO | IEEE80211_CHAN_STURBO)))
++ continue;
++ }
+ if (mode == IEEE80211_MODE_AUTO) {
+ /*
+ * XXX special-case 11b/g channels so we select
projects / openwrt.git / blobdiff