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mac80211: implement Operating Mode Notification extended NSS support

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Somehow we missed this for a long time, but similar to the extended
NSS support in VHT capabilities, we need to have this in Operating
Mode notification.

Implement it by
 * parsing the 160/80+80 bit there and setting the bandwidth
   appropriately
 * having callers of ieee80211_get_vht_max_nss() pass in the current
   max NSS value as received in the operating mode notification in
   order to modify it appropriately depending on the extended NSS
   bits.

This updates all drivers that use it, i.e. only iwlwifi/mvm.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200326150855.098483728cfa.I4e8c25d3288441759c2793247197229f0696a37d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2020-03-26 15:09:32 +02:00
parent 873b1cf611
commit 9166cc4976
4 changed files with 34 additions and 20 deletions
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10
net/mac80211/vht.c
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@@ -4,7 +4,7 @@
*
* Portions of this file
* Copyright(c) 2015 - 2016 Intel Deutschland GmbH
* Copyright (C) 2018 - 2019 Intel Corporation
* Copyright (C) 2018 - 2020 Intel Corporation
*/
#include <linux/ieee80211.h>
@@ -575,15 +575,21 @@ u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
/* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
break;
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
/* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
break;
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80)
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
else
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
break;
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
/* legacy only, no longer used by newer spec */
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
break;
}