diff options
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 2 | ||||
| -rw-r--r-- | net/mac80211/mlme.c | 37 |
2 files changed, 38 insertions, 1 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 52930e9..90580e9 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -721,6 +721,7 @@ struct ieee80211_if_mesh { * back to wireless media and to the local net stack. * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume. * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver + * @IEEE80211_SDATA_MU_MIMO_OWNER: indicates interface owns MU-MIMO capability */ enum ieee80211_sub_if_data_flags { IEEE80211_SDATA_ALLMULTI = BIT(0), @@ -728,6 +729,7 @@ enum ieee80211_sub_if_data_flags { IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3), IEEE80211_SDATA_DISCONNECT_RESUME = BIT(4), IEEE80211_SDATA_IN_DRIVER = BIT(5), + IEEE80211_SDATA_MU_MIMO_OWNER = BIT(6), }; /** diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 6332ff7..705ef1d 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -6,6 +6,7 @@ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> * Copyright 2007, Michael Wu <flamingice@sourmilk.net> * Copyright 2013-2014 Intel Mobile Communications GmbH + * Copyright (C) 2015 Intel Deutschland GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -538,11 +539,16 @@ static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); } +/* This function determines vht capability flags for the association + * and builds the IE. + * Note - the function may set the owner of the MU-MIMO capability + */ static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, struct ieee80211_supported_band *sband, struct ieee80211_vht_cap *ap_vht_cap) { + struct ieee80211_local *local = sdata->local; u8 *pos; u32 cap; struct ieee80211_sta_vht_cap vht_cap; @@ -576,7 +582,34 @@ static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, */ if (!(ap_vht_cap->vht_cap_info & cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) - cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; + cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | + IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); + else if (!(ap_vht_cap->vht_cap_info & + cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) + cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; + + /* + * If some other vif is using the MU-MIMO capablity we cannot associate + * using MU-MIMO - this will lead to contradictions in the group-id + * mechanism. + * Ownership is defined since association request, in order to avoid + * simultaneous associations with MU-MIMO. + */ + if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { + bool disable_mu_mimo = false; + struct ieee80211_sub_if_data *other; + + list_for_each_entry_rcu(other, &local->interfaces, list) { + if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) { + disable_mu_mimo = true; + break; + } + } + if (disable_mu_mimo) + cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; + else + sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER; + } mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; @@ -2058,6 +2091,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); + sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER; sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; @@ -2520,6 +2554,7 @@ static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, eth_zero_addr(sdata->u.mgd.bssid); ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); sdata->u.mgd.flags = 0; + sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER; mutex_lock(&sdata->local->mtx); ieee80211_vif_release_channel(sdata); mutex_unlock(&sdata->local->mtx); |
