[PATCH v2] wifi: ath10k: add support to allow broadcast action frame RX

[James Prestwood <prestwoj@gmail.com>]

Broadcast action frames are needed for the Device Provisioning
Protocol (DPP) for Presence and PKEX Exchange requests. Currently
just ath9k has this capability so this is being enabled for
ath10k (for at least one hardware variant).

Add a new capability flag in ath10k_hw_params to indicate support
for receiving multicast action frames. This bit is then checked
when configuring the RX filter and (if set) multicast action frame
registration is enabled.

Until more hardware can be tested only the "qca6174 hw3.2" variant
is enabling this feature.

Note: I went ahead and removed the 'changed_flags' mask operation
since it had no effect, that parameter was not being used anywhere.

Tested-on: QCA6174 hw3.2 WLAN.RM.4.4.1-00288-

Signed-off-by: James Prestwood <prestwoj@gmail.com>
---
 drivers/net/wireless/ath/ath10k/core.c |  1 +
 drivers/net/wireless/ath/ath10k/hw.h   |  3 +++
 drivers/net/wireless/ath/ath10k/mac.c  | 14 +++++++++++---
 3 files changed, 15 insertions(+), 3 deletions(-)

v2:
 * Add flag in ath10k_hw_params and only set FIF_MCAST_ACTION
   if that hardware allows it.

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 5eb131ab916f..f2077756ffdf 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -381,6 +381,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.hw_restart_disconnect = false,
 		.use_fw_tx_credits = true,
 		.delay_unmap_buffer = false,
+		.mcast_frame_registration = true,
 	},
 	{
 		.id = QCA99X0_HW_2_0_DEV_VERSION,
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 9643031a4427..2aeb52c7f189 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -639,6 +639,9 @@ struct ath10k_hw_params {
 	bool use_fw_tx_credits;
 
 	bool delay_unmap_buffer;
+
+	/* The hardware support multicast frame registrations */
+	bool mcast_frame_registration;
 };
 
 struct htt_resp;
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index ec8d5b29bc72..0d0de3646d31 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -1249,7 +1249,7 @@ static bool ath10k_mac_monitor_vdev_is_needed(struct ath10k *ar)
 	return ar->monitor ||
 	       (!test_bit(ATH10K_FW_FEATURE_ALLOWS_MESH_BCAST,
 			  ar->running_fw->fw_file.fw_features) &&
-		(ar->filter_flags & FIF_OTHER_BSS)) ||
+		(ar->filter_flags & (FIF_OTHER_BSS | FIF_MCAST_ACTION))) ||
 	       test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags);
 }
 
@@ -6027,11 +6027,15 @@ static void ath10k_configure_filter(struct ieee80211_hw *hw,
 {
 	struct ath10k *ar = hw->priv;
 	int ret;
+	unsigned int supported = SUPPORTED_FILTERS;
 
 	mutex_lock(&ar->conf_mutex);
 
-	changed_flags &= SUPPORTED_FILTERS;
-	*total_flags &= SUPPORTED_FILTERS;
+	if (ar->hw_params.mcast_frame_registration)
+		supported |= FIF_MCAST_ACTION;
+
+	*total_flags &= supported;
+
 	ar->filter_flags = *total_flags;
 
 	ret = ath10k_monitor_recalc(ar);
@@ -10114,6 +10118,10 @@ int ath10k_mac_register(struct ath10k *ar)
 			      NL80211_EXT_FEATURE_SET_SCAN_DWELL);
 	wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_AQL);
 
+	if (ar->hw_params.mcast_frame_registration)
+		wiphy_ext_feature_set(ar->hw->wiphy,
+				      NL80211_EXT_FEATURE_MULTICAST_REGISTRATIONS);
+
 	if (test_bit(WMI_SERVICE_TX_DATA_ACK_RSSI, ar->wmi.svc_map) ||
 	    test_bit(WMI_SERVICE_HTT_MGMT_TX_COMP_VALID_FLAGS, ar->wmi.svc_map))
 		wiphy_ext_feature_set(ar->hw->wiphy,
-- 
2.34.1