[PATCH] wifi: ath11k: change to move WMI_VDEV_PARAM_SET_HEMU_MODE before WMI_PEER_ASSOC_CMDID

[Jeff Johnson]

On 1/30/2024 6:18 PM, Baochen Qiang wrote:
> From: Wen Gong <quic_wgong at quicinc.com>
> 
> Currently when connecting to an AP with 11AX-HE phy mode, host sends
> WMI_VDEV_PARAM_SET_HEMU_MODE parameter to firmware after
> WMI_PEER_ASSOC_CMDID command. This results in TXBF not working, because
> firmware calculates TXBF values while handling WMI_PEER_ASSOC_CMDID,
> however at that time WMI_VDEV_PARAM_SET_HEMU_MODE has not been sent yet.
> See below log:
> 
> AP sends "VHT/HE/EHT NDP Announcement" to station, and station sends
> "Action no Ack" of category code HE to AP, the "Nc Index" and
> "Codebook Information" are wrong:
> 
> Issued action:
> IEEE 802.11 Action No Ack, Flags: ........
> IEEE 802.11 wireless LAN
>     Fixed parameters
>         Category code: HE (30)
>         HE Action: HE Compressed Beamforming And CQI (0)
>             Total length: 152
>             HE MIMO Control: 0x0004008018
>                 .... .... .... .... .... .... .... .... .... .000 = Nc Index: 1 Column (0)
>                 .... .... .... .... .... .... .... ..0. .... .... = Codebook Information: 0
> 
> Change to send WMI_VDEV_PARAM_SET_HEMU_MODE before WMI_PEER_ASSOC_CMDID,
> then firmware will calculate the TXBF values with valid parameters
> instead of empty values. TXBF works well and throughput performance is
> improved from 80 Mbps to 130 Mbps with this patch.
> 
> Good action after this patch:
> IEEE 802.11 Action No Ack, Flags: ........
> IEEE 802.11 wireless LAN
>     Fixed parameters
>         Category code: HE (30)
>         HE Action: HE Compressed Beamforming And CQI (0)
>             Total length: 409
>             HE MIMO Control: 0x0004008219
>                 .... .... .... .... .... .... .... .... .... .001 = Nc Index: 2 Columns (1)
>                 .... .... .... .... .... .... .... ..1. .... .... = Codebook Information: 1
> 
> This change applies to all chipsets.
> 
> Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.23
> 
> Fixes: 38dfe775d0ab ("wifi: ath11k: push MU-MIMO params from hostapd to hardware")
> Signed-off-by: Wen Gong <quic_wgong at quicinc.com>
> Signed-off-by: Baochen Qiang <quic_bqiang at quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson at quicinc.com>