wifi: ath11k: change to move WMI_VDEV_PARAM_SET_HEMU_MODE before WMI_PEER_ASSOC_CMDID

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@quicinc.com>
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240131021832.17298-1-quic_bqiang@quicinc.com

diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index bbf4d1f4d310c1f9b1a1355faeb6274499ca031c..df1b1ee7188167a4a586e5317db0b54c543d768a 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -3023,7 +3023,14 @@ static void ath11k_bss_assoc(struct ieee80211_hw *hw,
 
        rcu_read_unlock();
 
+       if (!ath11k_mac_vif_recalc_sta_he_txbf(ar, vif, &he_cap)) {
+               ath11k_warn(ar->ab, "failed to recalc he txbf for vdev %i on bss %pM\n",
+                           arvif->vdev_id, bss_conf->bssid);
+               return;
+       }
+
        peer_arg.is_assoc = true;
+
        ret = ath11k_wmi_send_peer_assoc_cmd(ar, &peer_arg);
        if (ret) {
                ath11k_warn(ar->ab, "failed to run peer assoc for %pM vdev %i: %d\n",
@@ -3046,12 +3053,6 @@ static void ath11k_bss_assoc(struct ieee80211_hw *hw,
                return;
        }
 
-       if (!ath11k_mac_vif_recalc_sta_he_txbf(ar, vif, &he_cap)) {
-               ath11k_warn(ar->ab, "failed to recalc he txbf for vdev %i on bss %pM\n",
-                           arvif->vdev_id, bss_conf->bssid);
-               return;
-       }
-
        WARN_ON(arvif->is_up);
 
        arvif->aid = vif->cfg.aid;