> > wt., 3 wrz 2024 o 09:47 Kalle Valo <kvalo@xxxxxxxxxx> napisał(a): > >> > >> + linux-wireless > >> > >> david Atkins <david@xxxxxxxxxxxxxx> writes: > >> > >> > ... > >> >> >>> 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 david
