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mac80211: stop toggling IEEE80211_HT_CAP_SUP_WIDTH_20_40

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For VHT, many more bandwidth changes are possible. As a first
step, stop toggling the IEEE80211_HT_CAP_SUP_WIDTH_20_40 flag
in the HT capabilities and instead introduce a bandwidth field
indicating the currently usable bandwidth to transmit to the
station. Of course, make all drivers use it.

To achieve this, make ieee80211_ht_cap_ie_to_sta_ht_cap() get
the station as an argument, rather than the new capabilities,
so it can set up the new bandwidth field.

If the station is a VHT station and VHT bandwidth is in use,
also set the bandwidth accordingly.

Doing this allows us to get rid of the supports_40mhz flag as
the HT capabilities now reflect the true capability instead of
the current setting.

While at it, also fix ieee80211_ht_cap_ie_to_sta_ht_cap() to not
ignore HT cap overrides when MCS TX isn't supported (not that it
really happens...)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2013-02-07 11:47:44 +01:00
parent 4a34215ef7
commit e1a0c6b3a4
27 changed files with 184 additions and 158 deletions
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24
drivers/net/wireless/iwlwifi/mvm/rs.c
View File

@@ -1209,23 +1209,9 @@ static s32 rs_get_best_rate(struct iwl_mvm *mvm,
return new_rate;
}
static bool iwl_is_ht40_tx_allowed(struct iwl_mvm *mvm,
struct ieee80211_sta_ht_cap *ht_cap)
static bool iwl_is_ht40_tx_allowed(struct ieee80211_sta *sta)
{
/*
* Remainder of this function checks ht_cap, but if it's
* NULL then we can do HT40 (special case for RXON)
*/
if (!ht_cap)
return true;
if (!ht_cap->ht_supported)
return false;
if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
return false;
return true;
return sta->bandwidth >= IEEE80211_STA_RX_BW_40;
}
/*
@@ -1258,7 +1244,7 @@ static int rs_switch_to_mimo2(struct iwl_mvm *mvm,
tbl->max_search = IWL_MAX_SEARCH;
rate_mask = lq_sta->active_mimo2_rate;
if (iwl_is_ht40_tx_allowed(mvm, &sta->ht_cap))
if (iwl_is_ht40_tx_allowed(sta))
tbl->is_ht40 = 1;
else
tbl->is_ht40 = 0;
@@ -1311,7 +1297,7 @@ static int rs_switch_to_mimo3(struct iwl_mvm *mvm,
tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
rate_mask = lq_sta->active_mimo3_rate;
if (iwl_is_ht40_tx_allowed(mvm, &sta->ht_cap))
if (iwl_is_ht40_tx_allowed(sta))
tbl->is_ht40 = 1;
else
tbl->is_ht40 = 0;
@@ -1356,7 +1342,7 @@ static int rs_switch_to_siso(struct iwl_mvm *mvm,
tbl->max_search = IWL_MAX_SEARCH;
rate_mask = lq_sta->active_siso_rate;
if (iwl_is_ht40_tx_allowed(mvm, &sta->ht_cap))
if (iwl_is_ht40_tx_allowed(sta))
tbl->is_ht40 = 1;
else
tbl->is_ht40 = 0;