qcacld-3.0: Update unsafe channel list for sta based on SAP operating band

qcacld-2.0 to qcacld-3.0 propagation

If SAP band is 2.4Ghz, driver will allow 5Ghz unsafe channels
in station scan list for connection / roaming.
And if SAP band is 5Ghz, We will allow 2.4Ghz unsafe channels
in station scan list for connection / roaming.

Change-Id: Ia204e5cabb6d8b87def90e42d4192afd5878e6fe
CRs-Fixed: 1062202

core/hdd/src/wlan_hdd_cfg80211.c

@@ -7249,6 +7249,43 @@ static enum sta_roam_policy_dfs_mode wlan_hdd_get_sta_roam_dfs_mode(
 	}
 }
 
+/*
+ * hdd_get_sap_operating_band:  Get current operating channel
+ * for sap.
+ * @hdd_ctx: hdd context
+ *
+ * Return : Corresponding band for SAP operating channel
+ */
+uint8_t hdd_get_sap_operating_band(hdd_context_t *hdd_ctx)
+{
+	hdd_adapter_list_node_t *adapter_node = NULL, *next = NULL;
+	QDF_STATUS status;
+	hdd_adapter_t *adapter;
+	uint8_t  operating_channel = 0;
+	uint8_t sap_operating_band = 0;
+	status = hdd_get_front_adapter(hdd_ctx, &adapter_node);
+	while (NULL != adapter_node && QDF_STATUS_SUCCESS == status) {
+		adapter = adapter_node->pAdapter;
+
+		if (!(adapter && (QDF_SAP_MODE == adapter->device_mode))) {
+			status = hdd_get_next_adapter(hdd_ctx, adapter_node,
+					&next);
+			adapter_node = next;
+			continue;
+		}
+		operating_channel = adapter->sessionCtx.ap.operatingChannel;
+		if (IS_24G_CH(operating_channel))
+			sap_operating_band = eCSR_BAND_24;
+		else if (IS_5G_CH(operating_channel))
+			sap_operating_band = eCSR_BAND_5G;
+		else
+			sap_operating_band = eCSR_BAND_ALL;
+		status = hdd_get_next_adapter(hdd_ctx, adapter_node,
+				&next);
+	}
+	return sap_operating_band;
+}
+
 static const struct nla_policy
 wlan_hdd_set_sta_roam_config_policy[
 QCA_WLAN_VENDOR_ATTR_STA_CONNECT_ROAM_POLICY_MAX + 1] = {
@@ -7287,6 +7324,7 @@ __wlan_hdd_cfg80211_sta_roam_policy(struct wiphy *wiphy,
 	enum dfs_mode mode = DFS_MODE_NONE;
 	bool skip_unsafe_channels = false;
 	QDF_STATUS status;
+	uint8_t sap_operating_band;
 
 	ENTER_DEV(dev);
 
@@ -7316,9 +7354,10 @@ __wlan_hdd_cfg80211_sta_roam_policy(struct wiphy *wiphy,
 	if (tb[QCA_WLAN_VENDOR_ATTR_STA_SKIP_UNSAFE_CHANNEL])
 		skip_unsafe_channels = nla_get_u8(
 			tb[QCA_WLAN_VENDOR_ATTR_STA_SKIP_UNSAFE_CHANNEL]);
-
+	sap_operating_band = hdd_get_sap_operating_band(hdd_ctx);
 	status = sme_update_sta_roam_policy(hdd_ctx->hHal, sta_roam_dfs_mode,
-			skip_unsafe_channels, adapter->sessionId);
+			skip_unsafe_channels, adapter->sessionId,
+			sap_operating_band);
 
 	if (!QDF_IS_STATUS_SUCCESS(status)) {
 		hdd_err("sme_update_sta_roam_policy (err=%d)", status);

core/hdd/src/wlan_hdd_cfg80211.h

@@ -3526,4 +3526,12 @@ struct cfg80211_bss *wlan_hdd_cfg80211_inform_bss_frame(hdd_adapter_t *pAdapter,
  */
 void hdd_lost_link_info_cb(void *context,
 			struct sir_lost_link_info *lost_link_info);
+/*
+ * hdd_get_sap_operating_band:  Get current operating channel
+ * for sap.
+ * @hdd_ctx: hdd context
+ *
+ * Return : Corresponding band for SAP operating channel
+ */
+uint8_t hdd_get_sap_operating_band(hdd_context_t *hdd_ctx);
 #endif

core/sme/inc/csr_api.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011-2016 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2011-2017 The Linux Foundation. All rights reserved.
  *
  * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
  *
@@ -1082,10 +1082,12 @@ enum sta_roam_policy_dfs_mode {
  * struct csr_sta_roam_policy_params - sta roam policy params for station
  * @dfs_mode: tell is DFS channels needs to be skipped while scanning
  * @skip_unsafe_channels: tells if unsafe channels needs to be skip in scanning
+ * @sap_operating_band: Opearting band for SAP
  */
 struct csr_sta_roam_policy_params {
 	enum sta_roam_policy_dfs_mode dfs_mode;
 	bool skip_unsafe_channels;
+	uint8_t sap_operating_band;
 };
 
 typedef struct tagCsrConfigParam {

core/sme/inc/sme_api.h

@@ -1273,7 +1273,7 @@ QDF_STATUS sme_update_access_policy_vendor_ie(tHalHandle hal,
 QDF_STATUS sme_update_sta_roam_policy(tHalHandle hal,
 		enum sta_roam_policy_dfs_mode dfs_mode,
 		bool skip_unsafe_channels,
-		uint8_t session_id);
+		uint8_t session_id, uint8_t sap_operating_band);
 QDF_STATUS sme_enable_disable_chanavoidind_event(tHalHandle hal,
 					uint8_t set_value);
 QDF_STATUS sme_set_default_scan_ie(tHalHandle hal, uint16_t session_id,

core/sme/src/common/sme_api.c

@@ -16790,6 +16790,7 @@ void sme_get_vdev_type_nss(tHalHandle hal, enum tQDF_ADAPTER_MODE dev_mode,
  * @skip_unsafe_channels: Param to tell if driver needs to
  * skip unsafe channels or not.
  * @param session_id: sme_session_id
+ * @sap_operating_band: Band on which SAP is operating
  *
  * sme_update_sta_roam_policy update sta rome policies to csr
  * this function will call csrUpdateChannelList as well
@@ -16800,7 +16801,7 @@ void sme_get_vdev_type_nss(tHalHandle hal, enum tQDF_ADAPTER_MODE dev_mode,
 QDF_STATUS sme_update_sta_roam_policy(tHalHandle hal_handle,
 		enum sta_roam_policy_dfs_mode dfs_mode,
 		bool skip_unsafe_channels,
-		uint8_t session_id)
+		uint8_t session_id, uint8_t sap_operating_band)
 {
 	tpAniSirGlobal mac_ctx = PMAC_STRUCT(hal_handle);
 	QDF_STATUS status = QDF_STATUS_SUCCESS;
@@ -16818,6 +16819,8 @@ QDF_STATUS sme_update_sta_roam_policy(tHalHandle hal_handle,
 		dfs_mode;
 	sme_config.csrConfig.sta_roam_policy_params.skip_unsafe_channels =
 		skip_unsafe_channels;
+	sme_config.csrConfig.sta_roam_policy_params.sap_operating_band =
+		sap_operating_band;
 
 	sme_update_config(hal_handle, &sme_config);
 

core/sme/src/csr/csr_api_roam.c

@@ -731,6 +731,8 @@ QDF_STATUS csr_update_channel_list(tpAniSirGlobal pMac)
 	}
 
 	for (i = 0; i < pScan->base_channels.numChannels; i++) {
+		struct csr_sta_roam_policy_params *roam_policy =
+			&pMac->roam.configParam.sta_roam_policy;
 		if (QDF_STATUS_SUCCESS !=
 			csr_emu_chan_req(pScan->base_channels.channelList[i]))
 			continue;
@@ -764,7 +766,13 @@ QDF_STATUS csr_update_channel_list(tpAniSirGlobal pMac)
 						break;
 					}
 				}
-				if (is_unsafe_chan) {
+				if ((is_unsafe_chan) &&
+				    ((CDS_IS_CHANNEL_24GHZ(channel) &&
+				      roam_policy->sap_operating_band ==
+					eCSR_BAND_24) ||
+					(CDS_IS_CHANNEL_5GHZ(channel) &&
+					 roam_policy->sap_operating_band ==
+					eCSR_BAND_5G))) {
 					QDF_TRACE(QDF_MODULE_ID_SME,
 					QDF_TRACE_LEVEL_INFO,
 					FL("ignoring unsafe channel %d"),

core/sme/src/csr/csr_api_scan.c

@@ -5388,7 +5388,19 @@ static void csr_scan_copy_request_valid_channels_only(tpAniSirGlobal mac_ctx,
 						break;
 					}
 				}
-				if (is_unsafe_chan) {
+				if (is_unsafe_chan &&
+					((CSR_IS_CHANNEL_24GHZ(
+						src_req->ChannelInfo.
+						ChannelList[index]) &&
+					mac_ctx->roam.configParam.
+					sta_roam_policy.sap_operating_band ==
+						eCSR_BAND_24) ||
+						(CDS_IS_CHANNEL_5GHZ(
+							src_req->ChannelInfo.
+							ChannelList[index]) &&
+					mac_ctx->roam.configParam.
+					sta_roam_policy.sap_operating_band ==
+						eCSR_BAND_5G))) {
 					QDF_TRACE(QDF_MODULE_ID_SME,
 						QDF_TRACE_LEVEL_INFO,
 					      FL("ignoring unsafe channel %d"),