qcacld-3.0: Implement vendor command to restart SAP on some channel

qcacld-2.0 to qcacld-3.0 propagation

Add support for vendor command which will do restart of the SAP
on desirable channel.
QCA_NL80211_VENDOR_SUBCMD_SET_SAP_CONFIG is used to send
driver to restart SAP device on some other channel.
Upon receiving this command, driver will do __hdd_hostapd_stop
and will disable all queues.
After that WLANSAP_StartBss start SAP on user config channel.

Change-Id: I34d4e4f758ca7e010ae198af31d9fc3777973b22
CRs-Fixed: 1000593

core/hdd/inc/wlan_hdd_main.h

@@ -1670,6 +1670,15 @@ static inline void hdd_set_tso_flags(hdd_context_t *hdd_ctx,
 	 struct net_device *wlan_dev){}
 #endif /* FEATURE_TSO */
 
+#if defined(FEATURE_WLAN_MCC_TO_SCC_SWITCH) || \
+	defined(FEATURE_WLAN_STA_AP_MODE_DFS_DISABLE)
+void wlan_hdd_restart_sap(hdd_adapter_t *ap_adapter);
+#else
+static inline void wlan_hdd_restart_sap(hdd_adapter_t *ap_adapter)
+{
+}
+#endif
+
 #ifdef WLAN_FEATURE_ROAM_OFFLOAD
 static inline bool roaming_offload_enabled(hdd_context_t *hdd_ctx)
 {

core/hdd/src/wlan_hdd_cfg80211.c

@@ -5359,6 +5359,119 @@ void hdd_init_bpf_completion(void)
 	init_completion(&bpf_context.completion);
 }
 
+static const struct nla_policy
+wlan_hdd_sap_config_policy[QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_MAX + 1] = {
+	[QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_CHANNEL] = {.type = NLA_U8 },
+};
+
+/**
+ * __wlan_hdd_cfg80211_sap_configuration_set() - ask driver to restart SAP if
+ * SAP is on unsafe channel.
+ * @wiphy:    wiphy structure pointer
+ * @wdev:     Wireless device structure pointer
+ * @data:     Pointer to the data received
+ * @data_len: Length of @data
+ *
+ * __wlan_hdd_cfg80211_sap_configuration_set function set SAP params to
+ * driver.
+ * QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_CHAN will set sap config channel and
+ * will initiate restart of sap.
+ *
+ * Return: 0 on success; errno on failure
+ */
+static int
+__wlan_hdd_cfg80211_sap_configuration_set(struct wiphy *wiphy,
+		struct wireless_dev *wdev,
+		const void *data, int data_len)
+{
+	struct net_device *ndev = wdev->netdev;
+	hdd_adapter_t *hostapd_adapter = WLAN_HDD_GET_PRIV_PTR(ndev);
+	hdd_context_t *hdd_ctx = wiphy_priv(wiphy);
+	struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_MAX + 1];
+	uint8_t config_channel = 0;
+	hdd_ap_ctx_t *ap_ctx;
+	int ret;
+
+	ENTER();
+
+	if (QDF_GLOBAL_FTM_MODE == hdd_get_conparam()) {
+		hddLog(LOGE, FL("Command not allowed in FTM mode"));
+		return -EINVAL;
+	}
+
+	ret = wlan_hdd_validate_context(hdd_ctx);
+	if (0 != ret)
+		return -EINVAL;
+
+	if (nla_parse(tb, QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_MAX,
+				data, data_len,
+				wlan_hdd_sap_config_policy)) {
+		hddLog(LOGE, FL("invalid attr"));
+		return -EINVAL;
+	}
+
+	if (tb[QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_CHANNEL]) {
+		if (!test_bit(SOFTAP_BSS_STARTED,
+					&hostapd_adapter->event_flags)) {
+			hdd_err("SAP is not started yet. Restart sap will be invalid");
+			return -EINVAL;
+		}
+
+		config_channel =
+			nla_get_u8(tb[QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_CHANNEL]);
+
+		if (!((IS_24G_CH(config_channel)) ||
+			(IS_5G_CH(config_channel)))) {
+			hdd_err("Channel  %d is not valid to restart SAP",
+					config_channel);
+			return -ENOTSUPP;
+		}
+
+		ap_ctx = WLAN_HDD_GET_AP_CTX_PTR(hostapd_adapter);
+		ap_ctx->sapConfig.channel = config_channel;
+		ap_ctx->sapConfig.ch_params.ch_width =
+					ap_ctx->sapConfig.ch_width_orig;
+
+		sme_set_ch_params(hdd_ctx->hHal,
+				ap_ctx->sapConfig.SapHw_mode,
+				ap_ctx->sapConfig.channel,
+				ap_ctx->sapConfig.sec_ch,
+				&ap_ctx->sapConfig.ch_params);
+
+		cds_restart_sap(hostapd_adapter);
+	}
+
+	return 0;
+}
+
+/**
+ * wlan_hdd_cfg80211_sap_configuration_set() - sap configuration vendor command
+ * @wiphy:    wiphy structure pointer
+ * @wdev:     Wireless device structure pointer
+ * @data:     Pointer to the data received
+ * @data_len: Length of @data
+ *
+ * __wlan_hdd_cfg80211_sap_configuration_set function set SAP params to
+ * driver.
+ * QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_CHAN will set sap config channel and
+ * will initiate restart of sap.
+ *
+ * Return: 0 on success; errno on failure
+ */
+static int wlan_hdd_cfg80211_sap_configuration_set(struct wiphy *wiphy,
+		struct wireless_dev *wdev,
+		const void *data, int data_len)
+{
+	int ret;
+
+	cds_ssr_protect(__func__);
+	ret = __wlan_hdd_cfg80211_sap_configuration_set(wiphy,
+			wdev, data, data_len);
+	cds_ssr_unprotect(__func__);
+
+	return ret;
+}
+
 #undef BPF_INVALID
 #undef BPF_SET_RESET
 #undef BPF_VERSION
@@ -5845,6 +5958,15 @@ const struct wiphy_vendor_command hdd_wiphy_vendor_commands[] = {
 			WIPHY_VENDOR_CMD_NEED_RUNNING,
 		.doit = wlan_hdd_cfg80211_bpf_offload
 	},
+	{
+		.info.vendor_id = QCA_NL80211_VENDOR_ID,
+		.info.subcmd = QCA_NL80211_VENDOR_SUBCMD_SET_SAP_CONFIG,
+		.flags = WIPHY_VENDOR_CMD_NEED_WDEV |
+			WIPHY_VENDOR_CMD_NEED_NETDEV |
+			WIPHY_VENDOR_CMD_NEED_RUNNING,
+		.doit = wlan_hdd_cfg80211_sap_configuration_set
+	},
+
 };
 
 /**

core/hdd/src/wlan_hdd_cfg80211.h

@@ -258,6 +258,7 @@ typedef enum {
  * @QCA_NL80211_VENDOR_SUBCMD_GW_PARAM_CONFIG: set gateway parameters
  * @QCA_NL80211_VENDOR_SUBCMD_SET_TXPOWER_SCALE: set tx power by percentage
  * @QCA_NL80211_VENDOR_SUBCMD_SET_TXPOWER_SCALE_DECR_DB: reduce tx power by DB
+ * @QCA_NL80211_VENDOR_SUBCMD_SET_SAP_CONFIG: SAP configuration
  * @QCA_NL80211_VENDOR_SUBCMD_TSF: TSF operations command
  * @QCA_NL80211_VENDOR_SUBCMD_WISA: WISA mode configuration
  */
@@ -379,6 +380,7 @@ enum qca_nl80211_vendor_subcmds {
 	QCA_NL80211_VENDOR_SUBCMD_SET_TXPOWER_SCALE = 109,
 	/* Tx power scaling in db subcommands */
 	QCA_NL80211_VENDOR_SUBCMD_SET_TXPOWER_SCALE_DECR_DB = 115,
+	QCA_NL80211_VENDOR_SUBCMD_SET_SAP_CONFIG  = 118,
 	QCA_NL80211_VENDOR_SUBCMD_TSF = 119,
 	QCA_NL80211_VENDOR_SUBCMD_WISA = 120,
 };
@@ -2357,6 +2359,22 @@ enum qca_vendor_attr_txpower_scale_decr_db {
 		QCA_WLAN_VENDOR_ATTR_TXPOWER_SCALE_DECR_DB_AFTER_LAST - 1
 };
 
+/**
+ * enum qca_wlan_vendor_attr_sap_config - config params for sap configuration
+ * @QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_INVALID: invalid
+ * @QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_CHANNEL: Channel on which SAP should start
+ * @QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_AFTER_LAST: after last
+ * @QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_MAX: max attribute
+ */
+enum qca_wlan_vendor_attr_sap_config {
+	QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_INVALID = 0,
+	QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_CHANNEL,
+	/* keep last */
+	QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_AFTER_LAST,
+	QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_MAX =
+	QCA_WLAN_VENDOR_ATTR_SAP_CONFIG_AFTER_LAST - 1,
+};
+
 struct cfg80211_bss *wlan_hdd_cfg80211_update_bss_db(hdd_adapter_t *pAdapter,
 						tCsrRoamInfo *pRoamInfo);