From: Johannes Berg <johannes.berg@xxxxxxxxx>
Even before channel contexts/multi-channel, having a
single global TX power limit was already problematic,
in particular if two managed interfaces connected to
two APs with different power constraints. The channel
context introduction completely broke this though and
in fact I had disabled TX power tracking there (for
drivers using channel contexts.)
Change everything to track TX power per interface so
that different user settings and different channel
maxima are treated correctly.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
include/net/mac80211.h | 7 ++++++-
net/mac80211/cfg.c | 27 +++++++++------------------
net/mac80211/chan.c | 2 ++
net/mac80211/debugfs.c | 3 ---
net/mac80211/debugfs_netdev.c | 6 ++++++
net/mac80211/ieee80211_i.h | 11 ++++++++---
net/mac80211/iface.c | 38 ++++++++++++++++++++++++++++++++++++++
net/mac80211/main.c | 23 +++++++++++++----------
net/mac80211/mlme.c | 32 +++++++++++++++++---------------
net/mac80211/trace.h | 2 ++
net/mac80211/util.c | 3 ++-
11 files changed, 103 insertions(+), 51 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 00b7204..9318c66 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -207,6 +207,7 @@ struct ieee80211_chanctx_conf {
* @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode)
* @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode)
* @BSS_CHANGED_PS: PS changed for this BSS (STA mode)
+ * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface
*/
enum ieee80211_bss_change {
BSS_CHANGED_ASSOC = 1<<0,
@@ -227,6 +228,7 @@ enum ieee80211_bss_change {
BSS_CHANGED_SSID = 1<<15,
BSS_CHANGED_AP_PROBE_RESP = 1<<16,
BSS_CHANGED_PS = 1<<17,
+ BSS_CHANGED_TXPOWER = 1<<18,
/* when adding here, make sure to change ieee80211_reconfig */
};
@@ -309,6 +311,7 @@ enum ieee80211_rssi_event {
* @ssid: The SSID of the current vif. Only valid in AP-mode.
* @ssid_len: Length of SSID given in @ssid.
* @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode.
+ * @txpower: TX power in dBm
*/
struct ieee80211_bss_conf {
const u8 *bssid;
@@ -341,6 +344,7 @@ struct ieee80211_bss_conf {
u8 ssid[IEEE80211_MAX_SSID_LEN];
size_t ssid_len;
bool hidden_ssid;
+ int txpower;
};
/**
@@ -884,7 +888,8 @@ enum ieee80211_smps_mode {
* powersave documentation below. This variable is valid only when
* the CONF_PS flag is set.
*
- * @power_level: requested transmit power (in dBm)
+ * @power_level: requested transmit power (in dBm), backward compatibility
+ * value only that is set to the minimum of all interfaces
*
* @channel: the channel to tune to
* @channel_type: the channel (HT) type
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 081169a..e880db6 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1974,34 +1974,21 @@ static int ieee80211_set_tx_power(struct wiphy *wiphy,
struct wireless_dev *wdev,
enum nl80211_tx_power_setting type, int mbm)
{
- struct ieee80211_local *local = wiphy_priv(wiphy);
- struct ieee80211_channel *chan = local->_oper_channel;
- u32 changes = 0;
-
- /* FIXME */
- if (local->use_chanctx)
- return -EOPNOTSUPP;
+ struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
switch (type) {
case NL80211_TX_POWER_AUTOMATIC:
- local->user_power_level = -1;
+ sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
break;
case NL80211_TX_POWER_LIMITED:
- if (mbm < 0 || (mbm % 100))
- return -EOPNOTSUPP;
- local->user_power_level = MBM_TO_DBM(mbm);
- break;
case NL80211_TX_POWER_FIXED:
if (mbm < 0 || (mbm % 100))
return -EOPNOTSUPP;
- /* TODO: move to cfg80211 when it knows the channel */
- if (MBM_TO_DBM(mbm) > chan->max_power)
- return -EINVAL;
- local->user_power_level = MBM_TO_DBM(mbm);
+ sdata->user_power_level = MBM_TO_DBM(mbm);
break;
}
- ieee80211_hw_config(local, changes);
+ ieee80211_recalc_txpower(sdata);
return 0;
}
@@ -2011,8 +1998,12 @@ static int ieee80211_get_tx_power(struct wiphy *wiphy,
int *dbm)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
+ struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
- *dbm = local->hw.conf.power_level;
+ if (!local->use_chanctx)
+ *dbm = local->hw.conf.power_level;
+ else
+ *dbm = sdata->vif.bss_conf.txpower;
return 0;
}
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index f84b860..a2b06d4 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -173,6 +173,8 @@ static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf);
ctx->refcount++;
+ ieee80211_recalc_txpower(sdata);
+
return 0;
}
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 466f4b4..eda8929 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -59,8 +59,6 @@ static const struct file_operations name## _ops = { \
debugfs_create_file(#name, mode, phyd, local, &name## _ops);
-DEBUGFS_READONLY_FILE(user_power, "%d",
- local->user_power_level);
DEBUGFS_READONLY_FILE(power, "%d",
local->hw.conf.power_level);
DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
@@ -251,7 +249,6 @@ void debugfs_hw_add(struct ieee80211_local *local)
DEBUGFS_ADD_MODE(reset, 0200);
#endif
DEBUGFS_ADD(hwflags);
- DEBUGFS_ADD(user_power);
DEBUGFS_ADD(power);
statsd = debugfs_create_dir("statistics", phyd);
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 3393ad5..07c5721 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -168,6 +168,9 @@ IEEE80211_IF_FILE(rc_rateidx_mcs_mask_5ghz,
IEEE80211_IF_FILE(flags, flags, HEX);
IEEE80211_IF_FILE(state, state, LHEX);
IEEE80211_IF_FILE(channel_type, vif.bss_conf.channel_type, DEC);
+IEEE80211_IF_FILE(txpower, vif.bss_conf.txpower, DEC);
+IEEE80211_IF_FILE(ap_power_level, ap_power_level, DEC);
+IEEE80211_IF_FILE(user_power_level, user_power_level, DEC);
/* STA attributes */
IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
@@ -632,6 +635,9 @@ static void add_files(struct ieee80211_sub_if_data *sdata)
DEBUGFS_ADD(flags);
DEBUGFS_ADD(state);
DEBUGFS_ADD(channel_type);
+ DEBUGFS_ADD(txpower);
+ DEBUGFS_ADD(user_power_level);
+ DEBUGFS_ADD(ap_power_level);
if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
add_common_files(sdata);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 3026519..7704458 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -743,6 +743,11 @@ struct ieee80211_sub_if_data {
u8 needed_rx_chains;
enum ieee80211_smps_mode smps_mode;
+#define IEEE80211_UNSET_POWER_LEVEL INT_MIN
+
+ int user_power_level; /* in dBm */
+ int ap_power_level; /* in dBm */
+
/*
* AP this belongs to: self in AP mode and
* corresponding AP in VLAN mode, NULL for
@@ -1117,9 +1122,6 @@ struct ieee80211_local {
int dynamic_ps_user_timeout;
bool disable_dynamic_ps;
- int user_power_level; /* in dBm */
- int ap_power_level; /* in dBm */
-
enum ieee80211_smps_mode smps_mode;
struct work_struct restart_work;
@@ -1365,6 +1367,9 @@ void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
+bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
+void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
+
static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
{
return test_bit(SDATA_STATE_RUNNING, &sdata->state);
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index c50cf6b..be817d1 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -42,6 +42,41 @@
* by either the RTNL, the iflist_mtx or RCU.
*/
+bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ int power;
+
+ rcu_read_lock();
+ chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+ if (!chanctx_conf) {
+ rcu_read_unlock();
+ return false;
+ }
+
+ power = chanctx_conf->channel->max_power;
+ rcu_read_unlock();
+
+ if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
+ power = min(power, sdata->user_power_level);
+
+ if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
+ power = min(power, sdata->ap_power_level);
+
+ if (power != sdata->vif.bss_conf.txpower) {
+ sdata->vif.bss_conf.txpower = power;
+ ieee80211_hw_config(sdata->local, 0);
+ return true;
+ }
+
+ return false;
+}
+
+void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
+{
+ if (__ieee80211_recalc_txpower(sdata))
+ ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
+}
static u32 ieee80211_idle_off(struct ieee80211_local *local,
const char *reason)
@@ -1529,6 +1564,9 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
ieee80211_set_default_queues(sdata);
+ sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
+ sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
+
/* setup type-dependent data */
ieee80211_setup_sdata(sdata, type);
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index fd8345c..ad97f17 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -95,11 +95,13 @@ static void ieee80211_reconfig_filter(struct work_struct *work)
static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
{
+ struct ieee80211_sub_if_data *sdata;
struct ieee80211_channel *chan;
u32 changed = 0;
int power;
enum nl80211_channel_type channel_type;
u32 offchannel_flag;
+ bool scanning = false;
offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
if (local->scan_channel) {
@@ -146,16 +148,18 @@ static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
changed |= IEEE80211_CONF_CHANGE_SMPS;
}
- if (test_bit(SCAN_SW_SCANNING, &local->scanning) ||
- test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
- test_bit(SCAN_HW_SCANNING, &local->scanning) ||
- !local->ap_power_level)
- power = chan->max_power;
- else
- power = min(chan->max_power, local->ap_power_level);
+ scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+ test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
+ test_bit(SCAN_HW_SCANNING, &local->scanning);
+ power = chan->max_power;
- if (local->user_power_level >= 0)
- power = min(power, local->user_power_level);
+ rcu_read_lock();
+ list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+ if (!rcu_access_pointer(sdata->vif.chanctx_conf))
+ continue;
+ power = min(power, sdata->vif.bss_conf.txpower);
+ }
+ rcu_read_unlock();
if (local->hw.conf.power_level != power) {
changed |= IEEE80211_CONF_CHANGE_POWER;
@@ -633,7 +637,6 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
IEEE80211_RADIOTAP_MCS_HAVE_GI |
IEEE80211_RADIOTAP_MCS_HAVE_BW;
- local->user_power_level = -1;
wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
INIT_LIST_HEAD(&local->interfaces);
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 469d864..712baf9 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -820,10 +820,10 @@ void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
cbss->beacon_interval));
}
-static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_channel *channel,
- const u8 *country_ie, u8 country_ie_len,
- const u8 *pwr_constr_elem)
+static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_channel *channel,
+ const u8 *country_ie, u8 country_ie_len,
+ const u8 *pwr_constr_elem)
{
struct ieee80211_country_ie_triplet *triplet;
int chan = ieee80211_frequency_to_channel(channel->center_freq);
@@ -832,7 +832,7 @@ static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
/* Invalid IE */
if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
- return;
+ return 0;
triplet = (void *)(country_ie + 3);
country_ie_len -= 3;
@@ -873,19 +873,21 @@ static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
}
if (!have_chan_pwr)
- return;
+ return 0;
new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
- if (sdata->local->ap_power_level == new_ap_level)
- return;
+ if (sdata->ap_power_level == new_ap_level)
+ return 0;
sdata_info(sdata,
"Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
new_ap_level, chan_pwr, *pwr_constr_elem,
sdata->u.mgd.bssid);
- sdata->local->ap_power_level = new_ap_level;
- ieee80211_hw_config(sdata->local, 0);
+ sdata->ap_power_level = new_ap_level;
+ if (__ieee80211_recalc_txpower(sdata))
+ return BSS_CHANGED_TXPOWER;
+ return 0;
}
void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
@@ -1489,7 +1491,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
- local->ap_power_level = 0;
+ sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
del_timer_sync(&local->dynamic_ps_timer);
cancel_work_sync(&local->dynamic_ps_enable_work);
@@ -2624,10 +2626,10 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
if (elems.country_elem && elems.pwr_constr_elem &&
mgmt->u.probe_resp.capab_info &
cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
- ieee80211_handle_pwr_constr(sdata, chan,
- elems.country_elem,
- elems.country_elem_len,
- elems.pwr_constr_elem);
+ changed |= ieee80211_handle_pwr_constr(sdata, chan,
+ elems.country_elem,
+ elems.country_elem_len,
+ elems.pwr_constr_elem);
ieee80211_bss_info_change_notify(sdata, changed);
}
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index 0638541..cba4b12 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -342,6 +342,7 @@ TRACE_EVENT(drv_bss_info_changed,
__field(bool, ps);
__dynamic_array(u8, ssid, info->ssid_len);
__field(bool, hidden_ssid);
+ __field(int, txpower)
),
TP_fast_assign(
@@ -376,6 +377,7 @@ TRACE_EVENT(drv_bss_info_changed,
__entry->ps = info->ps;
memcpy(__get_dynamic_array(ssid), info->ssid, info->ssid_len);
__entry->hidden_ssid = info->hidden_ssid;
+ __entry->txpower = info->txpower;
),
TP_printk(
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 51a4a25..e18694b 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1450,7 +1450,8 @@ int ieee80211_reconfig(struct ieee80211_local *local)
BSS_CHANGED_BSSID |
BSS_CHANGED_CQM |
BSS_CHANGED_QOS |
- BSS_CHANGED_IDLE;
+ BSS_CHANGED_IDLE |
+ BSS_CHANGED_TXPOWER;
switch (sdata->vif.type) {
case NL80211_IFTYPE_STATION:
--
1.7.10.4
--
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