Aleksander Bajkowski <olek2@xxxxx> writes: > Hi, > > During a scan of the WiFi network, I discovered that HE capabilities > (WiFi 6) > are incorrectly displayed. This problem exists on OpenWRT running stable > versions of the kernel (5.10 and 5.15). I verified later that the problem > is present on other devices. I found that it only affects devices with > Atheros radio (ath9k and ath10k-ct) running on the big endian platforms. > On little endian platforms, everything looks OK. > > I suspect that the problem is in the ath9k driver because the mt76 driver > on the big endian platform shows the correct capabilities. > > Most interesting is the comparison of raw data. The order of bytes in the > words is reversed: > > |HE MAC Capabilities (0x010008120010): ||HE MAC Capabilities (0x000112081000):| > > Below you can see a summary of the tested routers, and the good and bad > logs. The WiFI networks were scanned using the 'iw dev wlanX scan' command. > > Device Driver Endianess HE Capabilities > > TL-WDR4300 ath9k big Bad > BT Home Hub 5A ath10k-ct big Bad > Xiaomi AX3200 mt76 little Good > AVM 7530 ath10k-ct little Good > Netgear R6220 mt76 big Good > > > Bad: > > |HE capabilities: HE MAC Capabilities (0x010008120010): Minimum Payload > size of 128 bytes: 1 All Ack Broadcast TWT Maximum A-MPDU Length > Exponent: 1 NDP Feedback Report HE PHY Capabilities: > (0x4c2002c06f5b951800cc00): HE160/HE80+80/5GHz Punctured Preamble RX: 2 > Doppler Rx DCM Max Constellation: 3 DCM Max NSS Tx: 1 DCM Max > Constellation Rx: 1 DCM Max NSS Rx: 1 Rx HE MU PPDU from Non-AP STA > Beamformee STS > 80Mhz: 6 Sounding Dimensions <= 80Mhz: 5 Sounding > Dimensions > 80Mhz: 2 Ng = 16 MU Feedback Codebook Size SU Feedback > Codebook Size MU Feedback Triggered MU Beamforming Feedback Triggered > CQI Feedback Partial Bandwidth DL MU-MIMO 80MHz in 160/80+80MHz HE PPDU > HE ER SU PPDU 1x HE-LTF 0.8us GI HE RX MCS and NSS set 80+80 MHz 1 > streams: MCS 0-7 2 streams: not supported 3 streams: MCS 0-9 4 streams: > MCS 0-7 5 streams: not supported 6 streams: MCS 0-11 7 streams: not > supported 8 streams: MCS 0-9 HE TX MCS and NSS set 80+80 MHz 1 streams: > MCS 0-9 2 streams: MCS 0-7 3 streams: not supported 4 streams: MCS 0-9 5 > streams: not supported 6 streams: MCS 0-9 7 streams: MCS 0-7 8 streams: > not supported| > > > Good: > > |HE capabilities: HE MAC Capabilities (0x000112081000): +HTC HE > Supported BSR OM Control Maximum A-MPDU Length Exponent: 2 OM Control UL > MU Data Disable RX HE PHY Capabilities: (0x4c2002c06f5b951800cc00): > HE40/HE80/5GHz HE160/5GHz 242 tone RUs/5GHz LDPC Coding in Payload NDP > with 4x HE-LTF and 3.2us GI Rx HE MU PPDU from Non-AP STA SU Beamformer > SU Beamformee MU Beamformer Beamformee STS <= 80Mhz: 3 Beamformee STS > > 80Mhz: 3 Sounding Dimensions <= 80Mhz: 3 Sounding Dimensions > 80Mhz: 3 > Ng = 16 SU Feedback Codebook Size SU Feedback Triggered SU Beamforming > Feedback Triggered CQI Feedback PPE Threshold Present Max NC: 3 TX > 1024-QAM RX 1024-QAM HE RX MCS and NSS set <= 80 MHz 1 streams: MCS 0-11 > 2 streams: MCS 0-11 3 streams: MCS 0-11 4 streams: MCS 0-11 5 streams: > not supported 6 streams: not supported 7 streams: not supported 8 > streams: not supported HE TX MCS and NSS set <= 80 MHz 1 streams: MCS > 0-11 2 streams: MCS 0-11 3 streams: MCS 0-11 4 streams: MCS 0-11 5 > streams: not supported 6 streams: not supported 7 streams: not supported > 8 streams: not supported HE RX MCS and NSS set 160 MHz 1 streams: MCS > 0-11 2 streams: MCS 0-11 3 streams: MCS 0-11 4 streams: MCS 0-11 5 > streams: not supported 6 streams: not supported 7 streams: not supported > 8 streams: not supported HE TX MCS and NSS set 160 MHz 1 streams: MCS > 0-11 2 streams: MCS 0-11 3 streams: MCS 0-11 4 streams: MCS 0-11 5 > streams: not supported 6 streams: not supported 7 streams: not supported > 8 streams: not supported PPE Threshold 0x7b 0x1c 0xc7 0x71 0x1c 0xc7 > 0x71 0x1c 0xc7 0x71 0x1c 0xc7 0x71| +Felix, in the hope he has an idea of where to go looking for the cause of this... -Toke
