From 23a1f8d44c0bca48f04fc2a2f1edafd826ce6133 Mon Sep 17 00:00:00 2001 From: Sara Sharon Date: Tue, 8 Dec 2015 16:04:31 +0200 Subject: mac80211: process and save VHT MU-MIMO group frame The Group ID Management frame is an Action frame of category VHT. It is transmitted by the AP to assign or change the user position of a STA for one or more group IDs. Process and save the group membership data. Notify underlying driver of changes. Signed-off-by: Sara Sharon Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- net/mac80211/util.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/mac80211/util.c') diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 3943d4bf289c..f4b2c04e7d81 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1928,6 +1928,9 @@ int ieee80211_reconfig(struct ieee80211_local *local) BSS_CHANGED_IDLE | BSS_CHANGED_TXPOWER; + if (sdata->flags & IEEE80211_SDATA_MU_MIMO_OWNER) + changed |= BSS_CHANGED_MU_GROUPS; + switch (sdata->vif.type) { case NL80211_IFTYPE_STATION: changed |= BSS_CHANGED_ASSOC | -- cgit v1.2.1 From 8ac3c70419176b0fbc4aeae30de661f690b2e3ae Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 18 Dec 2015 15:08:34 +0100 Subject: mac80211: refactor HT/VHT to chandef code The station MLME and IBSS/mesh ones use entirely different code for interpreting HT and VHT operation elements. Change the code that interprets them a bit - it now modifies an existing chandef - and use it also in the MLME code. Signed-off-by: Johannes Berg --- net/mac80211/util.c | 54 +++++++++++++++++++++++++++++------------------------ 1 file changed, 30 insertions(+), 24 deletions(-) (limited to 'net/mac80211/util.c') diff --git a/net/mac80211/util.c b/net/mac80211/util.c index f4b2c04e7d81..7d0479e31674 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -2383,17 +2383,13 @@ u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, return pos + sizeof(struct ieee80211_vht_operation); } -void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, - const struct ieee80211_ht_operation *ht_oper, - struct cfg80211_chan_def *chandef) +bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, + struct cfg80211_chan_def *chandef) { enum nl80211_channel_type channel_type; - if (!ht_oper) { - cfg80211_chandef_create(chandef, control_chan, - NL80211_CHAN_NO_HT); - return; - } + if (!ht_oper) + return false; switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { case IEEE80211_HT_PARAM_CHA_SEC_NONE: @@ -2407,42 +2403,52 @@ void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, break; default: channel_type = NL80211_CHAN_NO_HT; + return false; } - cfg80211_chandef_create(chandef, control_chan, channel_type); + cfg80211_chandef_create(chandef, chandef->chan, channel_type); + return true; } -void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan, - const struct ieee80211_vht_operation *oper, - struct cfg80211_chan_def *chandef) +bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper, + struct cfg80211_chan_def *chandef) { + struct cfg80211_chan_def new = *chandef; + int cf1, cf2; + if (!oper) - return; + return false; - chandef->chan = control_chan; + cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx, + chandef->chan->band); + cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx, + chandef->chan->band); switch (oper->chan_width) { case IEEE80211_VHT_CHANWIDTH_USE_HT: break; case IEEE80211_VHT_CHANWIDTH_80MHZ: - chandef->width = NL80211_CHAN_WIDTH_80; + new.width = NL80211_CHAN_WIDTH_80; + new.center_freq1 = cf1; break; case IEEE80211_VHT_CHANWIDTH_160MHZ: - chandef->width = NL80211_CHAN_WIDTH_160; + new.width = NL80211_CHAN_WIDTH_160; + new.center_freq1 = cf1; break; case IEEE80211_VHT_CHANWIDTH_80P80MHZ: - chandef->width = NL80211_CHAN_WIDTH_80P80; + new.width = NL80211_CHAN_WIDTH_80P80; + new.center_freq1 = cf1; + new.center_freq2 = cf2; break; default: - break; + return false; } - chandef->center_freq1 = - ieee80211_channel_to_frequency(oper->center_freq_seg1_idx, - control_chan->band); - chandef->center_freq2 = - ieee80211_channel_to_frequency(oper->center_freq_seg2_idx, - control_chan->band); + if (!cfg80211_chandef_valid(&new)) + return false; + + *chandef = new; + return true; } int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, -- cgit v1.2.1 From f4a0f0c5264e72d9279fbf9cf48a061526e8f788 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 25 Jan 2016 15:46:34 +0200 Subject: mac80211: add RX_FLAG_MACTIME_PLCP_START The timestamp given by iwlwifi is at the beginning of the frame over the air, at (or during) the SYNC field. Allow such timestamps to be given to mac80211, at least (for now) for frames with non-HT/VHT preambles. Signed-off-by: Johannes Berg --- net/mac80211/util.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'net/mac80211/util.c') diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 7d0479e31674..fb90d9c5df59 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -4,7 +4,7 @@ * Copyright 2006-2007 Jiri Benc * Copyright 2007 Johannes Berg * Copyright 2013-2014 Intel Mobile Communications GmbH - * Copyright (C) 2015 Intel Deutschland GmbH + * Copyright (C) 2015-2016 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 @@ -2671,6 +2671,18 @@ u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, sband = local->hw.wiphy->bands[status->band]; bitrate = sband->bitrates[status->rate_idx].bitrate; ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); + + if (status->flag & RX_FLAG_MACTIME_PLCP_START) { + /* TODO: handle HT/VHT preambles */ + if (status->band == IEEE80211_BAND_5GHZ) { + ts += 20 << shift; + mpdu_offset += 2; + } else if (status->flag & RX_FLAG_SHORTPRE) { + ts += 96; + } else { + ts += 192; + } + } } rate = cfg80211_calculate_bitrate(&ri); -- cgit v1.2.1 From f2ac7e301ae6397669ff3f79e691942a9b5d2f39 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Wed, 27 Jan 2016 15:26:12 +0100 Subject: mac80211: expose txq queue depth and size to drivers This will allow drivers to make more educated decisions whether to defer transmission or not. Relying on wake_tx_queue() call count implicitly was not possible because it could be called without queued frame count actually changing on software tx aggregation start/stop code paths. It was also not possible to know how long byte-wise queue was without dequeueing. Signed-off-by: Michal Kazior Signed-off-by: Johannes Berg --- net/mac80211/util.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'net/mac80211/util.c') diff --git a/net/mac80211/util.c b/net/mac80211/util.c index fb90d9c5df59..091f3dd62ad1 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -3368,3 +3368,17 @@ void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata, txqi->txq.ac = IEEE80211_AC_BE; } } + +void ieee80211_txq_get_depth(struct ieee80211_txq *txq, + unsigned long *frame_cnt, + unsigned long *byte_cnt) +{ + struct txq_info *txqi = to_txq_info(txq); + + if (frame_cnt) + *frame_cnt = txqi->queue.qlen; + + if (byte_cnt) + *byte_cnt = txqi->byte_cnt; +} +EXPORT_SYMBOL(ieee80211_txq_get_depth); -- cgit v1.2.1 From 23665aaf9170ae6328cc4f68250c529a628af2ab Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Mon, 1 Feb 2016 11:40:55 +0200 Subject: mac80211: Interoperability workaround for 80+80 and 160 MHz channels Number of deployed 80 MHz capable VHT stations that do not support 80+80 and 160 MHz bandwidths seem to misbehave when trying to connect to an AP that advertises 80+80 or 160 MHz channel bandwidth in the VHT Operation element. To avoid such issues with deployed devices, modify the design based on recently accepted IEEE 802.11 standard changes (*). This allows poorly implemented VHT 80 MHz stations to connect with the AP in 80 MHz mode. 80+80 and 160 MHz capable stations need to support the new workaround mechanism to allow full bandwidth to be used. However, there are more or less no impacted station with 80+80/160 capability deployed. The rebased version of this patch is based on the updated version from Johannes Berg to take the HT/VHT chandef refactoring into account. (*) Changes in https://mentor.ieee.org/802.11/dcn/15/11-15-1530-04-000m-vht160-operation-signaling-through-non-zero-ccfs1.docx were accepted during the IEEE 802.11 January 2016 meeting. Signed-off-by: Jouni Malinen Signed-off-by: Johannes Berg --- net/mac80211/util.c | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-) (limited to 'net/mac80211/util.c') diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 091f3dd62ad1..f1e5b76eda70 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -2364,10 +2364,23 @@ u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, switch (chandef->width) { case NL80211_CHAN_WIDTH_160: - vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ; + /* + * Convert 160 MHz channel width to new style as interop + * workaround. + */ + vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; + vht_oper->center_freq_seg2_idx = vht_oper->center_freq_seg1_idx; + if (chandef->chan->center_freq < chandef->center_freq1) + vht_oper->center_freq_seg1_idx -= 8; + else + vht_oper->center_freq_seg1_idx += 8; break; case NL80211_CHAN_WIDTH_80P80: - vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ; + /* + * Convert 80+80 MHz channel width to new style as interop + * workaround. + */ + vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; break; case NL80211_CHAN_WIDTH_80: vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; @@ -2430,6 +2443,20 @@ bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper, case IEEE80211_VHT_CHANWIDTH_80MHZ: new.width = NL80211_CHAN_WIDTH_80; new.center_freq1 = cf1; + /* If needed, adjust based on the newer interop workaround. */ + if (oper->center_freq_seg2_idx) { + unsigned int diff; + + diff = abs(oper->center_freq_seg2_idx - + oper->center_freq_seg1_idx); + if (diff == 8) { + new.width = NL80211_CHAN_WIDTH_160; + new.center_freq1 = cf2; + } else if (diff > 8) { + new.width = NL80211_CHAN_WIDTH_80P80; + new.center_freq2 = cf2; + } + } break; case IEEE80211_VHT_CHANWIDTH_160MHZ: new.width = NL80211_CHAN_WIDTH_160; -- cgit v1.2.1 From b5a33d52595f0cb153f09bf45a5dcd66a7418dbb Mon Sep 17 00:00:00 2001 From: Sara Sharon Date: Tue, 16 Feb 2016 12:48:18 +0200 Subject: mac80211: move MU_MIMO_OWNER flag to ieee80211_vif Drivers may need to track which vif is using VHT MU-MIMO. Move the flag indicationg the ownership of MU_MIMO to ieee80211_vif. Signed-off-by: Sara Sharon Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- net/mac80211/util.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/mac80211/util.c') diff --git a/net/mac80211/util.c b/net/mac80211/util.c index f1e5b76eda70..89f71799df84 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1928,7 +1928,7 @@ int ieee80211_reconfig(struct ieee80211_local *local) BSS_CHANGED_IDLE | BSS_CHANGED_TXPOWER; - if (sdata->flags & IEEE80211_SDATA_MU_MIMO_OWNER) + if (sdata->vif.mu_mimo_owner) changed |= BSS_CHANGED_MU_GROUPS; switch (sdata->vif.type) { -- cgit v1.2.1