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iwlwifi: mvm: Block 26-tone RU OFDMA transmissions

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In case that there are OBSS that do not know how to properly
interpret 26-tone RU OFDMA transmissions, instruct the FW not
to use such transmissions.

The check is currently only performed upon association.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Ilan Peer 2019-05-19 14:56:31 +03:00 committed by Luca Coelho
parent 07c89a601b
commit 4f58121dc4
3 changed files with 61 additions and 0 deletions
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4
drivers/net/wireless/intel/iwlwifi/fw/api/mac.h
View File

@ -500,6 +500,9 @@ struct iwl_he_pkt_ext {
* enabled AGG, i.e. both BACK and non-BACK frames in a single AGG
* @STA_CTXT_HE_MU_EDCA_CW: indicates that there is an element of MU EDCA
* parameter set, i.e. the backoff counters for trig-based ACs
* @STA_CTXT_HE_RU_2MHZ_BLOCK: indicates that 26-tone RU OFDMA transmission are
* not allowed (as there are OBSS that might classify such transmissions as
* radar pulses).
*/
enum iwl_he_sta_ctxt_flags {
STA_CTXT_HE_REF_BSSID_VALID = BIT(4),
@ -511,6 +514,7 @@ enum iwl_he_sta_ctxt_flags {
STA_CTXT_HE_CONST_TRIG_RND_ALLOC = BIT(10),
STA_CTXT_HE_ACK_ENABLED = BIT(11),
STA_CTXT_HE_MU_EDCA_CW = BIT(12),
STA_CTXT_HE_RU_2MHZ_BLOCK = BIT(14),
};
/**

54
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
View File

@ -2254,6 +2254,10 @@ static void iwl_mvm_cfg_he_sta(struct iwl_mvm *mvm,
flags = 0;
/* Block 26-tone RU OFDMA transmissions */
if (mvmvif->he_ru_2mhz_block)
flags |= STA_CTXT_HE_RU_2MHZ_BLOCK;
/* HTC flags */
if (sta->he_cap.he_cap_elem.mac_cap_info[0] &
IEEE80211_HE_MAC_CAP0_HTC_HE)
@ -3205,6 +3209,51 @@ iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
peer_addr, action);
}
struct iwl_mvm_he_obss_narrow_bw_ru_data {
bool tolerated;
};
static void iwl_mvm_check_he_obss_narrow_bw_ru_iter(struct wiphy *wiphy,
struct cfg80211_bss *bss,
void *_data)
{
struct iwl_mvm_he_obss_narrow_bw_ru_data *data = _data;
const struct element *elem;
elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, bss->ies->data,
bss->ies->len);
if (!elem || elem->datalen < 10 ||
!(elem->data[10] &
WLAN_EXT_CAPA10_OBSS_NARROW_BW_RU_TOLERANCE_SUPPORT)) {
data->tolerated = false;
}
}
static void iwl_mvm_check_he_obss_narrow_bw_ru(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_he_obss_narrow_bw_ru_data iter_data = {
.tolerated = true,
};
if (!(vif->bss_conf.chandef.chan->flags & IEEE80211_CHAN_RADAR)) {
mvmvif->he_ru_2mhz_block = false;
return;
}
cfg80211_bss_iter(hw->wiphy, &vif->bss_conf.chandef,
iwl_mvm_check_he_obss_narrow_bw_ru_iter,
&iter_data);
/*
* If there is at least one AP on radar channel that cannot
* tolerate 26-tone RU UL OFDMA transmissions using HE TB PPDU.
*/
mvmvif->he_ru_2mhz_block = !iter_data.tolerated;
}
static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
@ -3306,6 +3355,11 @@ static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
iwl_mvm_cfg_he_sta(mvm, vif, mvm_sta->sta_id);
} else if (vif->type == NL80211_IFTYPE_STATION) {
vif->bss_conf.he_support = sta->he_cap.has_he;
mvmvif->he_ru_2mhz_block = false;
if (sta->he_cap.has_he)
iwl_mvm_check_he_obss_narrow_bw_ru(hw, vif);
iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
}

3
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
View File

@ -504,6 +504,9 @@ struct iwl_mvm_vif {
/* we can only have 2 GTK + 2 IGTK active at a time */
struct ieee80211_key_conf *ap_early_keys[4];
/* 26-tone RU OFDMA transmissions should be blocked */
bool he_ru_2mhz_block;
};
static inline struct iwl_mvm_vif *