[PATCH ath-next V15 0/9] wifi: ath12k: add MU-MIMO and 160 MHz bandwidth support

[Baochen Qiang]

On 7/1/2025 9:03 AM, Pradeep Kumar Chitrapu wrote:
>   Add support for
> 1. enabling MU-MIMO in HE and EHT modes from hardware
> 2. setting fixed HE rate/GI/LTF
> 3. 160 MHz bandwidth in HE mode
> 4. extended NSS bandwidth support
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
> 
> changes in v15:
>  - rebased the series after merge conflicts reported
>  patch 4/9:

patch 5/9 ?

>  - change the fix to apply for all modes except STA mode as
>    WCN7850 expect it same as before.

It is not chip specific behavior, for now we believe it is mode behavior.

> 
> changes in v14:
>  patch 6/9:
>  - cap max_nss using ar->num_tx_chains to fix interop issue caused due
>    to sending nss value 4 when firmware only supports nss value 2.
>  patch 8/9:
>  - Set the default return value to MODE_11AC_VHT160 for 160 MHz
>    to allow STA to connect to the AP even if it does not
>    explicitly indicate 160 MHz bandwidth support.
> 
> changes in v13:
>  - rebase
> 
> changes in v12:
>  - rebase
> 
> changes in v11:
>  patch 1/9:
>   - fix return values in ath12k_mac_set_he_txbf_conf() and
>     ath12k_mac_vif_recalc_sta_he_txbf()
>  patch 6/9:
>   - fix missing he_mcs initialization in ath12k_mac_init_arvif()
> 
> changes in v10:
>  patch 6/9:
>   - use ath12k_ahsta_to_sta()
>   - fix rcu_dereference warning in ath12k_mac_set_bitrate_mask_iter()
>   - change return type for ath12k_mac_validate_fixed_rate_settings()
>   - improve readability by adhering to nl80211 definitions of GI
>     NL80211_TXRATE_DEFAULT_GI. Introduce ath12k_mac_nlgi_to_wmigi()
>     for conversion.
>  patch 7/9:
>   - do not change default MODE_11AC_VHT160 in
>     ath12k_mac_get_phymode_vht() as it breaks clients which do not
>     set VHT_CAP_SUPP_CHAN_WIDTH_160MHZ.
>  patch 8/9:
>   - Use IEEE80211_VHT_CAP_EXT_NSS_BW_MASK along with
>     IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ for determining VHT160
>     phymode.
> 
> changes in v9: rebase on top of master branch with mlo changes
>  patch 1/9 and 2/9:
>   - fetch link_conf using ath12k_mac_get_link_bss_conf()
>     instead of arvif->vif->bss_conf before mlo
>  patch 6/9
>   - fetch mcs/nss values from sta->link[] instead of sta->deflink
>   - fix spelling of 'incompatibility'
>  patch 8/9
>   - replace sta->deflink.addr with arsta->addr in
>     ath12k_peer_assoc_h_vht
>  patch 9/9
>   - replace sta->deflink.rx_nss with link_sta->rx_nss
> 
> changes in v8:
>  - rebase and resolve KASAN warnings reported by Jeff in v7, in patch 6/9.
> 
> Pradeep Kumar Chitrapu (9):
>   wifi: ath12k: push HE MU-MIMO params to hardware
>   wifi: ath12k: push EHT MU-MIMO params to hardware
>   wifi: ath12k: move HE MCS mapper to a separate function
>   wifi: ath12k: generate rx and tx mcs maps for supported HE mcs
>   wifi: ath12k: fix TX and RX MCS rate configurations in HE mode
>   wifi: ath12k: add support for setting fixed HE rate/GI/LTF
>   wifi: ath12k: clean up 80P80 support
>   wifi: ath12k: add support for 160 MHz bandwidth
>   wifi: ath12k: add extended NSS bandwidth support for 160 MHz
> 
>  drivers/net/wireless/ath/ath12k/core.h |    2 +
>  drivers/net/wireless/ath/ath12k/mac.c  | 1144 ++++++++++++++++++++----
>  drivers/net/wireless/ath/ath12k/mac.h  |   17 +
>  drivers/net/wireless/ath/ath12k/wmi.c  |   28 +-
>  drivers/net/wireless/ath/ath12k/wmi.h  |  100 ++-
>  5 files changed, 1069 insertions(+), 222 deletions(-)
> 
> 
> base-commit: c256a94d1b1b15109740306f7f2a7c2173e12072