Currently mac80211 will send 3 scan request for each scan of WCN7850, they
are 2.4 GHz/5 GHz/6 GHz band scan. Firmware of WCN7850 will cache the RNR
IE(Reduced Neighbor Report element) which exist in the beacon of 2.4 GHz/5
GHz of the AP which is co-located with 6 GHz, and then use the cache to
scan in 6 GHz band scan if the 6 GHz scan is in the same scan with the 2.4
GHz/5 GHz band, this will helpful to search more AP of 6 GHz. Also it will
decrease the time cost of scan because firmware will use dual-band scan
for the 2.4 GHz/5 GHz, it means the 2.4 GHz and 5 GHz scans are doing
simultaneously.
Set the flag IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS for WCN7850 since it
supports 2.4 GHz/5 GHz/6 GHz in a single wiphy/ieee80211_hw.
This does not impact QCN9274, because it is not single_phy, so does not
have 2.4 GHz/5 GHz/6 GHz in the same wiphy, then it does not match the
condition and then IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS will not set for
QCN9274.
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
Signed-off-by: Wen Gong <[email protected]>
---
drivers/net/wireless/ath/ath12k/mac.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 0f2af2f14ef7..d4dc03dc8d11 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -7232,6 +7232,11 @@ static int __ath12k_mac_register(struct ath12k *ar)
ar->hw->wiphy->interface_modes = ab->hw_params->interface_modes;
+ if (ar->hw->wiphy->bands[NL80211_BAND_2GHZ] &&
+ ar->hw->wiphy->bands[NL80211_BAND_5GHZ] &&
+ ar->hw->wiphy->bands[NL80211_BAND_6GHZ])
+ ieee80211_hw_set(ar->hw, SINGLE_SCAN_ON_ALL_BANDS);
+
ieee80211_hw_set(ar->hw, SIGNAL_DBM);
ieee80211_hw_set(ar->hw, SUPPORTS_PS);
ieee80211_hw_set(ar->hw, SUPPORTS_DYNAMIC_PS);
base-commit: 3f257461ab0ab19806bae2bfde4c3cd88dbf050e
--
2.40.1
On 9/13/2023 3:55 AM, Wen Gong wrote:
> Currently mac80211 will send 3 scan request for each scan of WCN7850, they
> are 2.4 GHz/5 GHz/6 GHz band scan. Firmware of WCN7850 will cache the RNR
> IE(Reduced Neighbor Report element) which exist in the beacon of 2.4 GHz/5
> GHz of the AP which is co-located with 6 GHz, and then use the cache to
> scan in 6 GHz band scan if the 6 GHz scan is in the same scan with the 2.4
> GHz/5 GHz band, this will helpful to search more AP of 6 GHz. Also it will
> decrease the time cost of scan because firmware will use dual-band scan
> for the 2.4 GHz/5 GHz, it means the 2.4 GHz and 5 GHz scans are doing
> simultaneously.
>
> Set the flag IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS for WCN7850 since it
> supports 2.4 GHz/5 GHz/6 GHz in a single wiphy/ieee80211_hw.
>
> This does not impact QCN9274, because it is not single_phy, so does not
> have 2.4 GHz/5 GHz/6 GHz in the same wiphy, then it does not match the
> condition and then IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS will not set for
> QCN9274.
>
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
>
> Signed-off-by: Wen Gong <[email protected]>
Acked-by: Jeff Johnson <[email protected]>
> ---
> drivers/net/wireless/ath/ath12k/mac.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
> index 0f2af2f14ef7..d4dc03dc8d11 100644
> --- a/drivers/net/wireless/ath/ath12k/mac.c
> +++ b/drivers/net/wireless/ath/ath12k/mac.c
> @@ -7232,6 +7232,11 @@ static int __ath12k_mac_register(struct ath12k *ar)
>
> ar->hw->wiphy->interface_modes = ab->hw_params->interface_modes;
>
> + if (ar->hw->wiphy->bands[NL80211_BAND_2GHZ] &&
> + ar->hw->wiphy->bands[NL80211_BAND_5GHZ] &&
> + ar->hw->wiphy->bands[NL80211_BAND_6GHZ])
> + ieee80211_hw_set(ar->hw, SINGLE_SCAN_ON_ALL_BANDS);
> +
> ieee80211_hw_set(ar->hw, SIGNAL_DBM);
> ieee80211_hw_set(ar->hw, SUPPORTS_PS);
> ieee80211_hw_set(ar->hw, SUPPORTS_DYNAMIC_PS);
>
> base-commit: 3f257461ab0ab19806bae2bfde4c3cd88dbf050e
Wen Gong <[email protected]> wrote:
> Currently mac80211 will send 3 scan request for each scan of WCN7850, they
> are 2.4 GHz/5 GHz/6 GHz band scan. Firmware of WCN7850 will cache the RNR
> IE(Reduced Neighbor Report element) which exist in the beacon of 2.4 GHz/5
> GHz of the AP which is co-located with 6 GHz, and then use the cache to
> scan in 6 GHz band scan if the 6 GHz scan is in the same scan with the 2.4
> GHz/5 GHz band, this will helpful to search more AP of 6 GHz. Also it will
> decrease the time cost of scan because firmware will use dual-band scan
> for the 2.4 GHz/5 GHz, it means the 2.4 GHz and 5 GHz scans are doing
> simultaneously.
>
> Set the flag IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS for WCN7850 since it
> supports 2.4 GHz/5 GHz/6 GHz in a single wiphy/ieee80211_hw.
>
> This does not impact QCN9274, because it is not single_phy, so does not
> have 2.4 GHz/5 GHz/6 GHz in the same wiphy, then it does not match the
> condition and then IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS will not set for
> QCN9274.
>
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
>
> Signed-off-by: Wen Gong <[email protected]>
> Acked-by: Jeff Johnson <[email protected]>
> Signed-off-by: Kalle Valo <[email protected]>
Patch applied to ath-next branch of ath.git, thanks.
a1e09eb35476 wifi: ath12k: enable IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS for WCN7850
--
https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches