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mac80211: Fix HT channel selection

Browse source 
HT management is done differently for AP and STA modes, unify
to just the ->config() callback since HT is fundamentally a
PHY property and cannot be per-BSS.

Rename enum nl80211_sec_chan_offset as nl80211_channel_type to denote
the channel type ( NO_HT, HT20, HT40+, HT40- ).

Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Sujith <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
This commit is contained in:
Sujith 2008-12-12 11:57:43 +05:30 • committed by John W. Linville
commit 094d05dc32
13 changed files with 109 additions and 169 deletions
Download patch file Download diff file Expand all files Collapse all files

4
net/mac80211/cfg.c
View file

@ -1122,12 +1122,12 @@ static int ieee80211_set_txq_params(struct wiphy *wiphy,
static int ieee80211_set_channel(struct wiphy *wiphy,
struct ieee80211_channel *chan,
enum nl80211_sec_chan_offset sec_chan_offset)
enum nl80211_channel_type channel_type)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
local->oper_channel = chan;
local->oper_sec_chan_offset = sec_chan_offset;
local->oper_channel_type = channel_type;
return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
}

35
net/mac80211/ht.c
View file

@ -98,6 +98,7 @@ u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
struct ieee80211_bss_ht_conf ht;
u32 changed = 0;
bool enable_ht = true, ht_changed;
enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
@ -112,24 +113,36 @@ u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
ieee80211_channel_to_frequency(hti->control_chan))
enable_ht = false;
/*
* XXX: This is totally incorrect when there are multiple virtual
* interfaces, needs to be fixed later.
*/
ht_changed = local->hw.conf.ht.enabled != enable_ht;
if (enable_ht) {
channel_type = NL80211_CHAN_HT20;
if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
(sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
(hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
channel_type = NL80211_CHAN_HT40PLUS;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
channel_type = NL80211_CHAN_HT40MINUS;
break;
}
}
}
ht_changed = local->hw.conf.ht.enabled != enable_ht ||
channel_type != local->hw.conf.ht.channel_type;
local->oper_channel_type = channel_type;
local->hw.conf.ht.enabled = enable_ht;
if (ht_changed)
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT);
/* disable HT */
if (!enable_ht)
return 0;
ht.secondary_channel_offset =
hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
ht.width_40_ok =
!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
(sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
(hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY);
ht.operation_mode = le16_to_cpu(hti->operation_mode);
/* if bss configuration changed store the new one */

2
net/mac80211/ieee80211_i.h
View file

@ -625,7 +625,7 @@ struct ieee80211_local {
struct delayed_work scan_work;
struct ieee80211_sub_if_data *scan_sdata;
struct ieee80211_channel *oper_channel, *scan_channel;
enum nl80211_sec_chan_offset oper_sec_chan_offset;
enum nl80211_channel_type oper_channel_type;
u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
size_t scan_ssid_len;
struct list_head bss_list;

27
net/mac80211/main.c
View file

@ -195,37 +195,30 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
struct ieee80211_channel *chan;
int ret = 0;
int power;
enum nl80211_sec_chan_offset sec_chan_offset;
enum nl80211_channel_type channel_type;
might_sleep();
if (local->sw_scanning) {
chan = local->scan_channel;
sec_chan_offset = NL80211_SEC_CHAN_NO_HT;
channel_type = NL80211_CHAN_NO_HT;
} else {
chan = local->oper_channel;
sec_chan_offset = local->oper_sec_chan_offset;
channel_type = local->oper_channel_type;
}
if (chan != local->hw.conf.channel ||
sec_chan_offset != local->hw.conf.ht.sec_chan_offset) {
channel_type != local->hw.conf.ht.channel_type) {
local->hw.conf.channel = chan;
switch (sec_chan_offset) {
case NL80211_SEC_CHAN_NO_HT:
local->hw.conf.ht.channel_type = channel_type;
switch (channel_type) {
case NL80211_CHAN_NO_HT:
local->hw.conf.ht.enabled = false;
local->hw.conf.ht.sec_chan_offset = 0;
break;
case NL80211_SEC_CHAN_DISABLED:
case NL80211_CHAN_HT20:
case NL80211_CHAN_HT40MINUS:
case NL80211_CHAN_HT40PLUS:
local->hw.conf.ht.enabled = true;
local->hw.conf.ht.sec_chan_offset = 0;
break;
case NL80211_SEC_CHAN_BELOW:
local->hw.conf.ht.enabled = true;
local->hw.conf.ht.sec_chan_offset = -1;
break;
case NL80211_SEC_CHAN_ABOVE:
local->hw.conf.ht.enabled = true;
local->hw.conf.ht.sec_chan_offset = 1;
break;
}
changed |= IEEE80211_CONF_CHANGE_CHANNEL;

1
net/mac80211/mlme.c
View file

@ -858,6 +858,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
rcu_read_unlock();
local->hw.conf.ht.enabled = false;
local->oper_channel_type = NL80211_CHAN_NO_HT;
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT);
ieee80211_bss_info_change_notify(sdata, changed);

2
net/mac80211/util.c
View file

@ -641,7 +641,7 @@ int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
chan->flags & IEEE80211_CHAN_NO_IBSS)
return ret;
local->oper_channel = chan;
local->oper_sec_chan_offset = NL80211_SEC_CHAN_NO_HT;
local->oper_channel_type = NL80211_CHAN_NO_HT;
if (local->sw_scanning || local->hw_scanning)
ret = 0;