qcacld-3.0: add api to check if the channel is allowed for sap

Check the factors as below to decide whether the channel is
allowed or not:
 * If the channel is in LTE coex channel avoidance list;
 * If it's STA+SAP SCC;
 * If STA+SAP SCC on LTE coex channel is allowed.

Replace policy_mgr_is_safe_channel() with this new function
for sap channel selection and acs channel filtering, to allow
unsafe channels when it's STA+SAP SCC and STA+SAP SCC on LTE
coex channel is allowed.

CRs-Fixed: 2743042
Change-Id: Ic5a84b2628200fe9decf6972f00706f190f04722

components/cmn_services/policy_mgr/inc/wlan_policy_mgr_api.h

@@ -3013,6 +3013,21 @@ QDF_STATUS policy_mgr_get_updated_scan_and_fw_mode_config(
 bool policy_mgr_is_safe_channel(struct wlan_objmgr_psoc *psoc,
 				uint32_t ch_freq);
 
+/**
+ * policy_mgr_is_sap_freq_allowed - Check if the channel is allowed for sap
+ * @psoc: PSOC object information
+ * @sap_freq: channel frequency to be checked
+ *
+ * Check the factors as below to decide whether the channel is allowed or not:
+ * If the channel is in LTE coex channel avoidance list;
+ * If it's STA+SAP SCC;
+ * If STA+SAP SCC on LTE coex channel is allowed.
+ *
+ * Return: true for allowed, else false
+ */
+bool policy_mgr_is_sap_freq_allowed(struct wlan_objmgr_psoc *psoc,
+				    uint32_t sap_freq);
+
 /**
  * policy_mgr_get_ch_width() - Convert hw_mode_bandwidth to phy_ch_width
  * @bw: Hardware mode band width used by WMI

components/cmn_services/policy_mgr/src/wlan_policy_mgr_action.c

@@ -1485,6 +1485,25 @@ bool policy_mgr_is_safe_channel(struct wlan_objmgr_psoc *psoc,
 	return is_safe;
 }
 
+bool policy_mgr_is_sap_freq_allowed(struct wlan_objmgr_psoc *psoc,
+				    uint32_t sap_freq)
+{
+	if (policy_mgr_is_safe_channel(psoc, sap_freq))
+		return true;
+
+	/*
+	 * Return true if it's STA+SAP SCC and
+	 * STA+SAP SCC on LTE coex channel is allowed.
+	 */
+	if (policy_mgr_sta_sap_scc_on_lte_coex_chan(psoc) &&
+	    policy_mgr_is_sta_sap_scc(psoc, sap_freq)) {
+		policy_mgr_debug("unsafe freq %d for sap is allowed", sap_freq);
+		return true;
+	}
+
+	return false;
+}
+
 bool policy_mgr_is_sap_restart_required_after_sta_disconnect(
 			struct wlan_objmgr_psoc *psoc,
 			uint32_t sap_vdev_id, uint32_t *intf_ch_freq)

core/sap/src/sap_api_link_cntl.c

@@ -237,6 +237,7 @@ wlansap_filter_unsafe_ch(struct wlan_objmgr_psoc *psoc,
 {
 	uint16_t i;
 	uint16_t num_safe_ch = 0;
+	uint32_t freq;
 
 	/*
 	 * There are two channel list, one acs cfg channel list, and one
@@ -252,13 +253,12 @@ wlansap_filter_unsafe_ch(struct wlan_objmgr_psoc *psoc,
 	 * the acs channel list before chosing one of them as a default channel
 	 */
 	for (i = 0; i < sap_ctx->acs_cfg->ch_list_count; i++) {
-		if (!policy_mgr_is_safe_channel(
-				psoc, sap_ctx->acs_cfg->freq_list[i])) {
-			sap_debug("unsafe freq %d removed from acs list",
-				  sap_ctx->acs_cfg->freq_list[i]);
+		freq = sap_ctx->acs_cfg->freq_list[i];
+		if (!policy_mgr_is_sap_freq_allowed(psoc, freq)) {
+			sap_debug("remove freq %d from acs list", freq);
 			continue;
 		}
-		/* Add only safe channels to the acs cfg ch list */
+		/* Add only allowed channels to the acs cfg ch list */
 		sap_ctx->acs_cfg->freq_list[num_safe_ch++] =
 						sap_ctx->acs_cfg->freq_list[i];
 	}

core/sap/src/sap_ch_select.c

@@ -472,8 +472,11 @@ static bool sap_chan_sel_init(mac_handle_t mac_handle,
 			}
 		}
 
-		if (!policy_mgr_is_safe_channel(mac->psoc, *pChans))
+		if (!policy_mgr_is_sap_freq_allowed(mac->psoc, *pChans)) {
+			QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO_HIGH,
+				  "%s: Skip freq %d", __func__, *pChans);
 			continue;
+		}
 
 		/* OFDM rates are not supported on channel 14 */
 		if (channel == 14 &&