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madwifi: rework tx power handling, don't clamp user-configured tx power limit based on current channel properties
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15031 3c298f89-4303-0410-b956-a3cf2f4a3e73
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243
package/madwifi/patches/414-txpower.patch
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243
package/madwifi/patches/414-txpower.patch
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@ -0,0 +1,243 @@
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--- a/net80211/ieee80211.c
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+++ b/net80211/ieee80211.c
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@@ -270,6 +270,7 @@ ieee80211_ifattach(struct ieee80211com *
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("invalid number of channels specified: %u", ic->ic_nchans));
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memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
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ic->ic_modecaps |= 1 << IEEE80211_MODE_AUTO;
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+ ic->ic_max_txpower = IEEE80211_TXPOWER_MIN;
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for (i = 0; i < ic->ic_nchans; i++) {
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c = &ic->ic_channels[i];
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@@ -277,6 +278,7 @@ ieee80211_ifattach(struct ieee80211com *
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KASSERT(c->ic_ieee < IEEE80211_CHAN_MAX,
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("channel with bogus ieee number %u", c->ic_ieee));
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setbit(ic->ic_chan_avail, c->ic_ieee);
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+ ic->ic_max_txpower = max(ic->ic_max_txpower, (u16) c->ic_maxpower * 2);
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if (c->ic_scanflags & IEEE80211_NOSCAN_DEFAULT)
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c->ic_scanflags |= IEEE80211_NOSCAN_SET;
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@@ -346,8 +348,6 @@ ieee80211_ifattach(struct ieee80211com *
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TAILQ_INIT(&ic->ic_vaps);
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ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
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- ic->ic_txpowlimit = IEEE80211_TXPOWER_MIN;
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- ic->ic_newtxpowlimit = IEEE80211_TXPOWER_MAX;
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init_timer(&ic->ic_dfs_excl_timer);
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ic->ic_dfs_excl_timer.function =
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--- a/net80211/ieee80211_node.c
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+++ b/net80211/ieee80211_node.c
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@@ -1125,7 +1125,7 @@ ieee80211_alloc_node(struct ieee80211vap
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ni->ni_chan = IEEE80211_CHAN_ANYC;
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ni->ni_authmode = IEEE80211_AUTH_OPEN;
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- ni->ni_txpower = ic->ic_txpowlimit;
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+ ni->ni_txpower = IEEE80211_TXPOWER_MAX;
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ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
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IEEE80211_KEYIX_NONE);
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--- a/net80211/ieee80211_var.h
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+++ b/net80211/ieee80211_var.h
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@@ -343,8 +343,9 @@ struct ieee80211com {
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u_int16_t ic_holdover; /* PM hold over duration */
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u_int16_t ic_bmissthreshold; /* beacon miss threshold (# beacons) */
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unsigned long ic_bmiss_guard; /* when to cease ignoring bmiss (jiffies) */
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- u_int16_t ic_txpowlimit; /* global tx power limit (in 0.5 dBm) */
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- u_int16_t ic_newtxpowlimit; /* tx power limit to change to (in 0.5 dBm) */
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+ u_int16_t ic_txpowlimit; /* configured global tx power limit (in 0.5 dBm) */
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+ u_int16_t ic_max_txpower; /* global hardware tx power limit */
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+ u_int16_t ic_cur_txpower; /* current tx power */
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u_int16_t ic_uapsdmaxtriggers; /* max triggers that could arrive */
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u_int8_t ic_coverageclass; /* coverage class */
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u_int8_t ic_protmode_rssi; /* rssi threshold for protection mode */
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--- a/net80211/ieee80211_wireless.c
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+++ b/net80211/ieee80211_wireless.c
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@@ -920,17 +920,23 @@ ieee80211_ioctl_giwrange(struct net_devi
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u_int8_t reported[IEEE80211_CHAN_BYTES]; /* XXX stack usage? */
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int i, r;
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int step = 0;
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+ u_int16_t power;
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data->length = sizeof(struct iw_range);
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memset(range, 0, sizeof(struct iw_range));
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+ power = ic->ic_max_txpower;
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+ if (ic->ic_bsschan && (ic->ic_bsschan != IEEE80211_CHAN_ANYC))
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+ power = min(power, ic->ic_bsschan->ic_maxpower);
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+
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/* txpower (128 values, but will print out only IW_MAX_TXPOWER) */
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- range->num_txpower = (ic->ic_txpowlimit >= 8) ? IW_MAX_TXPOWER : ic->ic_txpowlimit;
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- step = ic->ic_txpowlimit / (2 * (IW_MAX_TXPOWER - 1));
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+ power /= 2; /* Unit: 0.5 dBm */
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+ range->num_txpower = (power >= 8) ? IW_MAX_TXPOWER : power;
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+ step = power / (IW_MAX_TXPOWER - 1);
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range->txpower[0] = 0;
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for (i = 1; i < IW_MAX_TXPOWER; i++)
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- range->txpower[i] = (ic->ic_txpowlimit/2)
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+ range->txpower[i] = power
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- (IW_MAX_TXPOWER - i - 1) * step;
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range->txpower_capa = IW_TXPOW_DBM;
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@@ -1382,10 +1388,8 @@ ieee80211_ioctl_siwtxpow(struct net_devi
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disabled = (fixed && vap->iv_bss->ni_txpower == 0);
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if (rrq->disabled) {
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if (!disabled) {
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- if ((ic->ic_caps & IEEE80211_C_TXPMGT) == 0)
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- return -EOPNOTSUPP;
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ic->ic_flags |= IEEE80211_F_TXPOW_FIXED;
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- vap->iv_bss->ni_txpower = 0;
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+ ic->ic_txpowlimit = 0;
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goto done;
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}
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return 0;
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@@ -1396,30 +1400,12 @@ ieee80211_ioctl_siwtxpow(struct net_devi
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return -EOPNOTSUPP;
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if (rrq->flags != IW_TXPOW_DBM)
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return -EINVAL;
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- if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) {
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- if ((ic->ic_bsschan->ic_maxregpower >= rrq->value) &&
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- (ic->ic_txpowlimit/2 >= rrq->value)) {
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- vap->iv_bss->ni_txpower = 2 * rrq->value;
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- ic->ic_newtxpowlimit = 2 * rrq->value;
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- ic->ic_flags |= IEEE80211_F_TXPOW_FIXED;
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- } else
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- return -EINVAL;
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- } else {
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- /*
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- * No channel set yet
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- */
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- if (ic->ic_txpowlimit/2 >= rrq->value) {
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- vap->iv_bss->ni_txpower = 2 * rrq->value;
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- ic->ic_newtxpowlimit = 2 * rrq->value;
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- ic->ic_flags |= IEEE80211_F_TXPOW_FIXED;
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- }
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- else
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- return -EINVAL;
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- }
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+ ic->ic_txpowlimit = 2 * rrq->value;
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+ ic->ic_flags |= IEEE80211_F_TXPOW_FIXED;
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} else {
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if (!fixed) /* no change */
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return 0;
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- ic->ic_newtxpowlimit = IEEE80211_TXPOWER_MAX;
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+ ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
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ic->ic_flags &= ~IEEE80211_F_TXPOW_FIXED;
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}
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done:
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@@ -1588,9 +1574,22 @@ ieee80211_ioctl_giwtxpow(struct net_devi
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{
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struct ieee80211vap *vap = dev->priv;
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struct ieee80211com *ic = vap->iv_ic;
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-
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- rrq->value = vap->iv_bss->ni_txpower / 2;
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- rrq->fixed = (ic->ic_flags & IEEE80211_F_TXPOW_FIXED) != 0;
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+ unsigned int power = ic->ic_txpowlimit;
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+ struct ieee80211_channel *c;
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+ u_int16_t txp = ic->ic_max_txpower;
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+
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+ if (ic->ic_bsschan && (ic->ic_bsschan != IEEE80211_CHAN_ANYC))
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+ txp = min(txp, ic->ic_bsschan->ic_maxpower);
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+ } else if (ic->ic_cur_txpower > 0) {
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+ txp = min(txp, ic->ic_cur_txpower);
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+ }
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+ if (ic->ic_flags & IEEE80211_F_TXPOW_FIXED) {
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+ txp = min(txp, ic->ic_txpowlimit);
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+ rrq->fixed = 1;
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+ } else {
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+ rrq->fixed = 0;
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+ }
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+ rrq->value = txp / 2;
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rrq->disabled = (rrq->fixed && rrq->value == 0);
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rrq->flags = IW_TXPOW_DBM;
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return 0;
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--- a/ath/if_ath.c
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+++ b/ath/if_ath.c
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@@ -380,7 +380,6 @@ static unsigned int ath_dump_hal_map(str
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static u_int32_t ath_get_clamped_maxtxpower(struct ath_softc *sc);
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static u_int32_t ath_set_clamped_maxtxpower(struct ath_softc *sc,
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u_int32_t new_clamped_maxtxpower);
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-static u_int32_t ath_get_real_maxtxpower(struct ath_softc *sc);
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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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@@ -3159,7 +3158,7 @@ ath_tx_startraw(struct net_device *dev,
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try0 = ph->try0;
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rt = sc->sc_currates;
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txrate = dot11_to_ratecode(sc, rt, ph->rate0);
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- power = ph->power > 60 ? 60 : ph->power;
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+ power = ph->power > 63 ? 63 : ph->power;
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hdrlen = ieee80211_anyhdrsize(wh);
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pktlen = skb->len + IEEE80211_CRC_LEN;
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@@ -8381,7 +8380,7 @@ ath_tx_start(struct net_device *dev, str
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pktlen, /* packet length */
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hdrlen, /* header length */
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atype, /* Atheros packet type */
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- MIN(ni->ni_txpower, 60), /* txpower */
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+ MIN(ni->ni_txpower, 63), /* txpower */
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txrate, try0, /* series 0 rate/tries */
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keyix, /* key cache index */
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antenna, /* antenna mode */
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@@ -10364,59 +10363,16 @@ ath_get_clamped_maxtxpower(struct ath_so
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/* XXX: this function needs some locking to avoid being called
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* twice/interrupted */
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-/* 1. Save the currently specified maximum txpower (as clamped by madwifi)
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- * 2. Determine the real maximum txpower the card can support by
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- * setting a value that exceeds the maximum range (by one) and
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- * finding out what it limits us to.
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- * 3. Restore the saved maxtxpower value we had previously specified */
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-static u_int32_t
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-ath_get_real_maxtxpower(struct ath_softc *sc)
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-{
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- u_int32_t saved_clamped_maxtxpower;
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- u_int32_t real_maxtxpower;
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-
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- saved_clamped_maxtxpower = ath_get_clamped_maxtxpower(sc);
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- real_maxtxpower =
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- ath_set_clamped_maxtxpower(sc, IEEE80211_TXPOWER_MAX + 1);
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- ath_set_clamped_maxtxpower(sc, saved_clamped_maxtxpower);
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- return real_maxtxpower;
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-}
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-
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-
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-/* XXX: this function needs some locking to avoid being called
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- * twice/interrupted */
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static void
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ath_update_txpow(struct ath_softc *sc)
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{
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struct ieee80211com *ic = &sc->sc_ic;
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struct ieee80211vap *vap = NULL;
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struct ath_hal *ah = sc->sc_ah;
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- u_int32_t prev_clamped_maxtxpower = 0;
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- u_int32_t new_clamped_maxtxpower = 0;
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/* Determine the previous value of maxtxpower */
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- prev_clamped_maxtxpower = ath_get_clamped_maxtxpower(sc);
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- /* Determine the real maximum txpower the card can support */
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- ic->ic_txpowlimit = ath_get_real_maxtxpower(sc);
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- /* Grab the new maxtxpower setting (which may have changed) */
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- new_clamped_maxtxpower = ic->ic_newtxpowlimit;
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- /* Make sure the change is within limits, clamp it otherwise */
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- if (ic->ic_newtxpowlimit > ic->ic_txpowlimit)
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- new_clamped_maxtxpower = ic->ic_txpowlimit;
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- /* Search for the VAP that needs a txpow change, if any */
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- TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
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- if (!tpc || ic->ic_newtxpowlimit != vap->iv_bss->ni_txpower) {
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- vap->iv_bss->ni_txpower = new_clamped_maxtxpower;
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- ieee80211_iterate_nodes(&vap->iv_ic->ic_sta,
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- set_node_txpower,
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- &new_clamped_maxtxpower);
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- }
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- }
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-
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- /* Store the assigned (clamped) maximum txpower and update the HAL */
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- sc->sc_curtxpow = new_clamped_maxtxpower;
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- if (new_clamped_maxtxpower != prev_clamped_maxtxpower)
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- ath_hal_settxpowlimit(ah, new_clamped_maxtxpower);
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+ ath_set_clamped_maxtxpower(sc, ic->ic_txpowlimit);
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+ ic->ic_cur_txpower = ath_get_clamped_maxtxpower(sc);
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}
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#ifdef ATH_SUPERG_XR
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