śr., 4 wrz 2024 o 08:04 david Atkins <david@xxxxxxxxxxxxxx> napisał(a): > > > > > >> > ... > > > > >> >> >>> Ext Tag: EHT Operation (802.11be D3.0) > > > > >> >> >>> Ext Tag length: 8 (Tag len: 9) > > > > >> >> >>> Ext Tag Number: EHT Operation (802.11be D3.0) (106) > > > > >> >> >>> EHT Operation Parameters: 0x01, EHT Operation > > > > >> >> >>> Information > > > > >> >> Present > > > > >> >> >>> .... ...1 = EHT Operation Information Present: True > > > > >> >> >>> .... ..0. = Disabled Subchannel Bitmap Present: False > > > > >> >> >>> .... .0.. = EHT Default PE Duration: False > > > > >> >> >>> .... 0... = Group Addressed BU Indication Limit: False > > > > >> >> >>> ..00 .... = Group Addressed BU Indication Exponent: 0 > > > > >> >> >>> 00.. .... = Reserved: 0x0 > > > > >> >> >>> Basic EHT-MCS And Nss Set: 0x44444444 > > > > >> >> >>> Control: 0x02, Channel Width: 80 MHz EHT BSS > > bandwidth > > > > >> >> >>> .... .010 = Channel Width: 80 MHz EHT BSS bandwidth > > (2) > > > > >> >> >>> 0000 0... = Reserved: 0x00 > > > > >> >> >>> > > > > >> >> >>> Are you saying the ath12k driver does not support these > > > > >> >> >>> features? If not can > > > > >> >> >> you clarify the issue so I can raise with the AP team. > > > > >> >> >>> > > > > >> >> >> ath12k/WCN7850 supports EHT, but with NSS only 2. Here the > > > > >> >> >> AP requires NSS to be no less than 4, that is why EHT > > > > >> >> >> connection was > > > > disabled. > > > > >> >> > > > > > >> >> > Which field is requiring NSS of 4, I'm only seeing a maximum > > > > >> >> > of 4, the > > > > >> >> Qualcomm windows driver will connect to the same AP, we had > > > > >> >> assumed that that ath12k would do the same. > > > > >> >> Basic EHT-MCS And Nss Set: 0x44444444 > > > > >> > > > > > >> > My understanding of the spec is that there are maximum numbers > > > > >> > of streams though, are you saying the AP has to advertise > > > > >> > 0x22222222 which would then prevent a 4x4 client (say an > > > > >> > extender) from connecting with 4 streams? I note that the > > > > >> > Qualcomm windows driver for Hamilton works with the AP and an > > > > >> > Intel BE200 also works both of which will be in at most 2x2 > > > > >> > > > > >> Did you test Intel BE200 with the Windows driver? Johannes > > > > >> mentioned that ieee80211_verify_sta_eht_mcs_support() in mac80211 > > > > >> checks this so I would assume that iwlwifi also behaves like ath12k. > > > > > > > > > > Yes, this is AP issue - hostapd fix required - advertise 0x11111 ... > > > > > In other case station < 4nss will drop to HE only. > > > > > > > > Thanks. And Johannes pointed out that you had even discussed about > > > > this > > > > before: > > > > > > > > https://lore.kernel.org/linux-wireless/CAFED-jk8pJheJEViESnE54f- > > > > K+JgRMiWoiCSa0GBt=RKaCn7sw@xxxxxxxxxxxxxx/ > > > > > > > > > > So this > > > > > > Basic EHT-MCS And Nss Set: 0x44444444 > > > > > > Should be 0x11111111 ? and it defines the minimum number of streams > > needed to connect? > > > > > > This the defines the max streams ? > > > > > > Supported EHT-MCS and NSS Set > > > EHT-MCS Map (BW <= 80MHz): 0x444444 > > > .... .... .... .... .... 0100 = Rx Max Nss That Supports EHT-MCS 0-9: > > 4 > > > .... .... .... .... 0100 .... = Tx Max Nss That Supports EHT-MCS 0-9: 4 > > > .... .... .... 0100 .... .... = Rx Max Nss That Supports EHT-MCS 10- > > 11: 4 > > > .... .... 0100 .... .... .... = Tx Max Nss That Supports EHT-MCS 10- > > 11: 4 > > > .... 0100 .... .... .... .... = Rx Max Nss That Supports EHT-MCS 12- > > 13: 4 > > > 0100 .... .... .... .... .... = Tx Max Nss That > > > Supports EHT-MCS 12-13: 4 > > > > > You mix different things: > > > > Supported EHT-MCS and NSS set vs Basic EHT-MCS And Nss Set > > So the basic set is the minimum? > linux mac80211 check it as minimum - if not pass disable client EHT OS hostapd set is as 0x00000011 but there is some TODO - so maybe someone else should describe it more :) https://w1.fi/cgit/hostap/tree/src/ap/ieee802_11_eht.c#n235 So, eg. OpenWrt/main EHT AP on mt7996e use 0x00000011, and Intel BE200/WCN7850 connect using EHT BR Janusz
