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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
master
Felix Fietkau 2009-03-25 01:26:44 +00:00
parent ec4a7c81ac
commit 7f8f42fdab
1 changed files with 243 additions and 0 deletions
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243
package/madwifi/patches/414-txpower.patch Normal file
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@ -0,0 +1,243 @@
--- a/net80211/ieee80211.c
+++ b/net80211/ieee80211.c
@@ -270,6 +270,7 @@ ieee80211_ifattach(struct ieee80211com *
("invalid number of channels specified: %u", ic->ic_nchans));
memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
ic->ic_modecaps |= 1 << IEEE80211_MODE_AUTO;
+ ic->ic_max_txpower = IEEE80211_TXPOWER_MIN;
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
@@ -277,6 +278,7 @@ ieee80211_ifattach(struct ieee80211com *
KASSERT(c->ic_ieee < IEEE80211_CHAN_MAX,
("channel with bogus ieee number %u", c->ic_ieee));
setbit(ic->ic_chan_avail, c->ic_ieee);
+ ic->ic_max_txpower = max(ic->ic_max_txpower, (u16) c->ic_maxpower * 2);
if (c->ic_scanflags & IEEE80211_NOSCAN_DEFAULT)
c->ic_scanflags |= IEEE80211_NOSCAN_SET;
@@ -346,8 +348,6 @@ ieee80211_ifattach(struct ieee80211com *
TAILQ_INIT(&ic->ic_vaps);
ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
- ic->ic_txpowlimit = IEEE80211_TXPOWER_MIN;
- ic->ic_newtxpowlimit = IEEE80211_TXPOWER_MAX;
init_timer(&ic->ic_dfs_excl_timer);
ic->ic_dfs_excl_timer.function =
--- a/net80211/ieee80211_node.c
+++ b/net80211/ieee80211_node.c
@@ -1125,7 +1125,7 @@ ieee80211_alloc_node(struct ieee80211vap
ni->ni_chan = IEEE80211_CHAN_ANYC;
ni->ni_authmode = IEEE80211_AUTH_OPEN;
- ni->ni_txpower = ic->ic_txpowlimit;
+ ni->ni_txpower = IEEE80211_TXPOWER_MAX;
ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
IEEE80211_KEYIX_NONE);
--- a/net80211/ieee80211_var.h
+++ b/net80211/ieee80211_var.h
@@ -343,8 +343,9 @@ struct ieee80211com {
u_int16_t ic_holdover; /* PM hold over duration */
u_int16_t ic_bmissthreshold; /* beacon miss threshold (# beacons) */
unsigned long ic_bmiss_guard; /* when to cease ignoring bmiss (jiffies) */
- u_int16_t ic_txpowlimit; /* global tx power limit (in 0.5 dBm) */
- u_int16_t ic_newtxpowlimit; /* tx power limit to change to (in 0.5 dBm) */
+ u_int16_t ic_txpowlimit; /* configured global tx power limit (in 0.5 dBm) */
+ u_int16_t ic_max_txpower; /* global hardware tx power limit */
+ u_int16_t ic_cur_txpower; /* current tx power */
u_int16_t ic_uapsdmaxtriggers; /* max triggers that could arrive */
u_int8_t ic_coverageclass; /* coverage class */
u_int8_t ic_protmode_rssi; /* rssi threshold for protection mode */
--- a/net80211/ieee80211_wireless.c
+++ b/net80211/ieee80211_wireless.c
@@ -920,17 +920,23 @@ ieee80211_ioctl_giwrange(struct net_devi
u_int8_t reported[IEEE80211_CHAN_BYTES]; /* XXX stack usage? */
int i, r;
int step = 0;
+ u_int16_t power;
data->length = sizeof(struct iw_range);
memset(range, 0, sizeof(struct iw_range));
+ power = ic->ic_max_txpower;
+ if (ic->ic_bsschan && (ic->ic_bsschan != IEEE80211_CHAN_ANYC))
+ power = min(power, ic->ic_bsschan->ic_maxpower);
+
/* txpower (128 values, but will print out only IW_MAX_TXPOWER) */
- range->num_txpower = (ic->ic_txpowlimit >= 8) ? IW_MAX_TXPOWER : ic->ic_txpowlimit;
- step = ic->ic_txpowlimit / (2 * (IW_MAX_TXPOWER - 1));
+ power /= 2; /* Unit: 0.5 dBm */
+ range->num_txpower = (power >= 8) ? IW_MAX_TXPOWER : power;
+ step = power / (IW_MAX_TXPOWER - 1);
range->txpower[0] = 0;
for (i = 1; i < IW_MAX_TXPOWER; i++)
- range->txpower[i] = (ic->ic_txpowlimit/2)
+ range->txpower[i] = power
- (IW_MAX_TXPOWER - i - 1) * step;
range->txpower_capa = IW_TXPOW_DBM;
@@ -1382,10 +1388,8 @@ ieee80211_ioctl_siwtxpow(struct net_devi
disabled = (fixed && vap->iv_bss->ni_txpower == 0);
if (rrq->disabled) {
if (!disabled) {
- if ((ic->ic_caps & IEEE80211_C_TXPMGT) == 0)
- return -EOPNOTSUPP;
ic->ic_flags |= IEEE80211_F_TXPOW_FIXED;
- vap->iv_bss->ni_txpower = 0;
+ ic->ic_txpowlimit = 0;
goto done;
}
return 0;
@@ -1396,30 +1400,12 @@ ieee80211_ioctl_siwtxpow(struct net_devi
return -EOPNOTSUPP;
if (rrq->flags != IW_TXPOW_DBM)
return -EINVAL;
- if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) {
- if ((ic->ic_bsschan->ic_maxregpower >= rrq->value) &&
- (ic->ic_txpowlimit/2 >= rrq->value)) {
- vap->iv_bss->ni_txpower = 2 * rrq->value;
- ic->ic_newtxpowlimit = 2 * rrq->value;
- ic->ic_flags |= IEEE80211_F_TXPOW_FIXED;
- } else
- return -EINVAL;
- } else {
- /*
- * No channel set yet
- */
- if (ic->ic_txpowlimit/2 >= rrq->value) {
- vap->iv_bss->ni_txpower = 2 * rrq->value;
- ic->ic_newtxpowlimit = 2 * rrq->value;
- ic->ic_flags |= IEEE80211_F_TXPOW_FIXED;
- }
- else
- return -EINVAL;
- }
+ ic->ic_txpowlimit = 2 * rrq->value;
+ ic->ic_flags |= IEEE80211_F_TXPOW_FIXED;
} else {
if (!fixed) /* no change */
return 0;
- ic->ic_newtxpowlimit = IEEE80211_TXPOWER_MAX;
+ ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
ic->ic_flags &= ~IEEE80211_F_TXPOW_FIXED;
}
done:
@@ -1588,9 +1574,22 @@ ieee80211_ioctl_giwtxpow(struct net_devi
{
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;
-
- rrq->value = vap->iv_bss->ni_txpower / 2;
- rrq->fixed = (ic->ic_flags & IEEE80211_F_TXPOW_FIXED) != 0;
+ unsigned int power = ic->ic_txpowlimit;
+ struct ieee80211_channel *c;
+ u_int16_t txp = ic->ic_max_txpower;
+
+ if (ic->ic_bsschan && (ic->ic_bsschan != IEEE80211_CHAN_ANYC))
+ txp = min(txp, ic->ic_bsschan->ic_maxpower);
+ } else if (ic->ic_cur_txpower > 0) {
+ txp = min(txp, ic->ic_cur_txpower);
+ }
+ if (ic->ic_flags & IEEE80211_F_TXPOW_FIXED) {
+ txp = min(txp, ic->ic_txpowlimit);
+ rrq->fixed = 1;
+ } else {
+ rrq->fixed = 0;
+ }
+ rrq->value = txp / 2;
rrq->disabled = (rrq->fixed && rrq->value == 0);
rrq->flags = IW_TXPOW_DBM;
return 0;
--- a/ath/if_ath.c
+++ b/ath/if_ath.c
@@ -380,7 +380,6 @@ static unsigned int ath_dump_hal_map(str
static u_int32_t ath_get_clamped_maxtxpower(struct ath_softc *sc);
static u_int32_t ath_set_clamped_maxtxpower(struct ath_softc *sc,
u_int32_t new_clamped_maxtxpower);
-static u_int32_t ath_get_real_maxtxpower(struct ath_softc *sc);
static void ath_poll_disable(struct net_device *dev);
static void ath_poll_enable(struct net_device *dev);
@@ -3159,7 +3158,7 @@ ath_tx_startraw(struct net_device *dev,
try0 = ph->try0;
rt = sc->sc_currates;
txrate = dot11_to_ratecode(sc, rt, ph->rate0);
- power = ph->power > 60 ? 60 : ph->power;
+ power = ph->power > 63 ? 63 : ph->power;
hdrlen = ieee80211_anyhdrsize(wh);
pktlen = skb->len + IEEE80211_CRC_LEN;
@@ -8381,7 +8380,7 @@ ath_tx_start(struct net_device *dev, str
pktlen, /* packet length */
hdrlen, /* header length */
atype, /* Atheros packet type */
- MIN(ni->ni_txpower, 60), /* txpower */
+ MIN(ni->ni_txpower, 63), /* txpower */
txrate, try0, /* series 0 rate/tries */
keyix, /* key cache index */
antenna, /* antenna mode */
@@ -10364,59 +10363,16 @@ ath_get_clamped_maxtxpower(struct ath_so
/* XXX: this function needs some locking to avoid being called
* twice/interrupted */
-/* 1. Save the currently specified maximum txpower (as clamped by madwifi)
- * 2. Determine the real maximum txpower the card can support by
- * setting a value that exceeds the maximum range (by one) and
- * finding out what it limits us to.
- * 3. Restore the saved maxtxpower value we had previously specified */
-static u_int32_t
-ath_get_real_maxtxpower(struct ath_softc *sc)
-{
- u_int32_t saved_clamped_maxtxpower;
- u_int32_t real_maxtxpower;
-
- saved_clamped_maxtxpower = ath_get_clamped_maxtxpower(sc);
- real_maxtxpower =
- ath_set_clamped_maxtxpower(sc, IEEE80211_TXPOWER_MAX + 1);
- ath_set_clamped_maxtxpower(sc, saved_clamped_maxtxpower);
- return real_maxtxpower;
-}
-
-
-/* XXX: this function needs some locking to avoid being called
- * twice/interrupted */
static void
ath_update_txpow(struct ath_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ieee80211vap *vap = NULL;
struct ath_hal *ah = sc->sc_ah;
- u_int32_t prev_clamped_maxtxpower = 0;
- u_int32_t new_clamped_maxtxpower = 0;
/* Determine the previous value of maxtxpower */
- prev_clamped_maxtxpower = ath_get_clamped_maxtxpower(sc);
- /* Determine the real maximum txpower the card can support */
- ic->ic_txpowlimit = ath_get_real_maxtxpower(sc);
- /* Grab the new maxtxpower setting (which may have changed) */
- new_clamped_maxtxpower = ic->ic_newtxpowlimit;
- /* Make sure the change is within limits, clamp it otherwise */
- if (ic->ic_newtxpowlimit > ic->ic_txpowlimit)
- new_clamped_maxtxpower = ic->ic_txpowlimit;
- /* Search for the VAP that needs a txpow change, if any */
- TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
- if (!tpc || ic->ic_newtxpowlimit != vap->iv_bss->ni_txpower) {
- vap->iv_bss->ni_txpower = new_clamped_maxtxpower;
- ieee80211_iterate_nodes(&vap->iv_ic->ic_sta,
- set_node_txpower,
- &new_clamped_maxtxpower);
- }
- }
-
- /* Store the assigned (clamped) maximum txpower and update the HAL */
- sc->sc_curtxpow = new_clamped_maxtxpower;
- if (new_clamped_maxtxpower != prev_clamped_maxtxpower)
- ath_hal_settxpowlimit(ah, new_clamped_maxtxpower);
+ ath_set_clamped_maxtxpower(sc, ic->ic_txpowlimit);
+ ic->ic_cur_txpower = ath_get_clamped_maxtxpower(sc);
}
#ifdef ATH_SUPERG_XR