From: Arik Nemtsov <[email protected]> Allow a device to specify support for the TDLS wider-bandwidth feature. Indicate this support during TDLS setup in the ext-capab IE and set an appropriate station flag when our TDLS peer supports it. This feature gives TDLS peers the ability to use a wider channel than the base width of the BSS. For instance VHT capable TDLS peers connected on a 20MHz channel can extend the channel to 80MHz, if regulatory considerations allow it.
Do not cap the bandwidth of such stations by the current BSS channel width in mac80211. Signed-off-by: Arik Nemtsov <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> --- This one is obviously needed by mac80211: upgrade BW of TDLS peers when possible I just sent. Sorry for not sending them as a series --- include/net/mac80211.h | 4 ++++ net/mac80211/cfg.c | 6 ++++++ net/mac80211/debugfs.c | 1 + net/mac80211/sta_info.h | 3 +++ net/mac80211/tdls.c | 18 +++++++++++++----- net/mac80211/vht.c | 8 ++++++-- 6 files changed, 33 insertions(+), 7 deletions(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 6b1077c..ec2c87e 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1888,6 +1888,9 @@ struct ieee80211_txq { * @IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS: The HW supports scanning on all bands * in one command, mac80211 doesn't have to run separate scans per band. * + * @IEEE80211_HW_TDLS_WIDER_BW: The device/driver supports wider bandwidth + * than then BSS bandwidth for a TDLS link on the base channel. + * * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays */ enum ieee80211_hw_flags { @@ -1920,6 +1923,7 @@ enum ieee80211_hw_flags { IEEE80211_HW_CHANCTX_STA_CSA, IEEE80211_HW_SUPPORTS_CLONED_SKBS, IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS, + IEEE80211_HW_TDLS_WIDER_BW, /* keep last, obviously */ NUM_IEEE80211_HW_FLAGS diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index bf7023f..55a1a54 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1097,6 +1097,12 @@ static int sta_apply_parameters(struct ieee80211_local *local, params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH) set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH); + if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && + ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) && + params->ext_capab_len >= 8 && + params->ext_capab[7] & WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) + set_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW); + if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) { sta->sta.uapsd_queues = params->uapsd_queues; sta->sta.max_sp = params->max_sp; diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c index 3ea8b7d..91dd7fd 100644 --- a/net/mac80211/debugfs.c +++ b/net/mac80211/debugfs.c @@ -122,6 +122,7 @@ static const char *hw_flag_names[NUM_IEEE80211_HW_FLAGS + 1] = { FLAG(CHANCTX_STA_CSA), FLAG(SUPPORTS_CLONED_SKBS), FLAG(SINGLE_SCAN_ON_ALL_BANDS), + FLAG(TDLS_WIDER_BW), /* keep last for the build bug below */ (void *)0x1 diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 226f8ca4..2cde9d0 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -53,6 +53,8 @@ * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this * TDLS peer + * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on + * the BSS base channel. * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was * keeping station in power-save mode, reply when the driver * unblocks the station. @@ -84,6 +86,7 @@ enum ieee80211_sta_info_flags { WLAN_STA_TDLS_INITIATOR, WLAN_STA_TDLS_CHAN_SWITCH, WLAN_STA_TDLS_OFF_CHANNEL, + WLAN_STA_TDLS_WIDER_BW, WLAN_STA_UAPSD, WLAN_STA_SP, WLAN_STA_4ADDR_EVENT, diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c index ad31b2d..fec1b33 100644 --- a/net/mac80211/tdls.c +++ b/net/mac80211/tdls.c @@ -35,20 +35,28 @@ void ieee80211_tdls_peer_del_work(struct work_struct *wk) mutex_unlock(&local->mtx); } -static void ieee80211_tdls_add_ext_capab(struct ieee80211_local *local, +static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) { - u8 *pos = (void *)skb_put(skb, 7); + struct ieee80211_local *local = sdata->local; bool chan_switch = local->hw.wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH; + bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW); + enum ieee80211_band band = ieee80211_get_sdata_band(sdata); + struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; + bool vht = sband && sband->vht_cap.vht_supported; + u8 *pos = (void *)skb_put(skb, 10); *pos++ = WLAN_EID_EXT_CAPABILITY; - *pos++ = 5; /* len */ + *pos++ = 8; /* len */ *pos++ = 0x0; *pos++ = 0x0; *pos++ = 0x0; *pos++ = chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0; *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; + *pos++ = 0; + *pos++ = 0; + *pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0; } static u8 @@ -320,7 +328,7 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, offset = noffset; } - ieee80211_tdls_add_ext_capab(local, skb); + ieee80211_tdls_add_ext_capab(sdata, skb); /* add the QoS element if we support it */ if (local->hw.queues >= IEEE80211_NUM_ACS && @@ -784,7 +792,7 @@ ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata, max(sizeof(struct ieee80211_mgmt), sizeof(struct ieee80211_tdls_data)) + 50 + /* supported rates */ - 7 + /* ext capab */ + 10 + /* ext capab */ 26 + /* max(WMM-info, WMM-param) */ 2 + max(sizeof(struct ieee80211_ht_cap), sizeof(struct ieee80211_ht_operation)) + diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c index 80694d5..f05808d 100644 --- a/net/mac80211/vht.c +++ b/net/mac80211/vht.c @@ -308,11 +308,15 @@ enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta) { struct ieee80211_sub_if_data *sdata = sta->sdata; enum ieee80211_sta_rx_bandwidth bw; + enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width; - bw = ieee80211_chan_width_to_rx_bw(sdata->vif.bss_conf.chandef.width); - bw = min(bw, ieee80211_sta_cap_rx_bw(sta)); + bw = ieee80211_sta_cap_rx_bw(sta); bw = min(bw, sta->cur_max_bandwidth); + /* do not cap the BW of TDLS WIDER_BW peers by the bss */ + if (!test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) + bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); + return bw; } -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
