qcacmn: Limit concurrency of STA(WAPI)

When STA role is coexisting with other sessions(P2P, SAP or IBSS),
WAPI encryption mode is not allowed.
Add a new API to check if the connection/start request should
be rejected when:
1) A STA with WAPI encryption is to be connected while there
   is at least one concurrent session already running.
2) A new session is to be started while there is already a STA
   connection with WAPI encryption enabled.

Change-Id: Idf0d346138eeda339254535f1f7131fda4a5086a
CRs-Fixed: 2290549

umac/cmn_services/policy_mgr/inc/wlan_policy_mgr_api.h

@@ -871,6 +871,10 @@ struct policy_mgr_sme_cbacks {
  *                      SAP
  * @get_mode_for_non_connected_vdev: Get the mode for a non
  *                                 connected vdev
+ * @hdd_get_device_mode: Get QDF_OPMODE type for session id (vdev id)
+ * @hdd_wapi_security_sta_exist: Get whether wapi encription station existing
+ * or not. Some hw doesn't support WAPI encryption concurrency with other
+ * encryption type.
  */
 struct policy_mgr_hdd_cbacks {
 	void (*sap_restart_chan_switch_cb)(struct wlan_objmgr_psoc *psoc,
@@ -885,6 +889,7 @@ struct policy_mgr_hdd_cbacks {
 				struct wlan_objmgr_psoc *psoc,
 				uint8_t vdev_id);
 	enum QDF_OPMODE (*hdd_get_device_mode)(uint32_t session_id);
+	bool (*hdd_wapi_security_sta_exist)(void);
 };
 
 

umac/cmn_services/policy_mgr/src/wlan_policy_mgr_get_set_utils.c

@@ -1544,6 +1544,29 @@ static bool policy_mgr_is_sub_20_mhz_enabled(struct wlan_objmgr_psoc *psoc)
 	return pm_ctx->user_cfg.sub_20_mhz_enabled;
 }
 
+/**
+ * policy_mgr_check_privacy_for_new_conn() - Check privacy mode concurrency
+ * @pm_ctx: policy_mgr_psoc_priv_obj policy mgr context
+ *
+ * This routine is called to check vdev security mode allowed in concurrency.
+ * At present, WAPI security mode is not allowed to run concurrency with any
+ * other vdev.
+ *
+ * Return: true - allow
+ */
+static bool policy_mgr_check_privacy_for_new_conn(
+	struct policy_mgr_psoc_priv_obj *pm_ctx)
+{
+	if (!pm_ctx->hdd_cbacks.hdd_wapi_security_sta_exist)
+		return true;
+
+	if (pm_ctx->hdd_cbacks.hdd_wapi_security_sta_exist() &&
+	    (policy_mgr_get_connection_count(pm_ctx->psoc) > 0))
+		return false;
+
+	return true;
+}
+
 bool policy_mgr_is_concurrency_allowed(struct wlan_objmgr_psoc *psoc,
 				       enum policy_mgr_con_mode mode,
 				       uint8_t channel,
@@ -1731,6 +1754,11 @@ bool policy_mgr_is_concurrency_allowed(struct wlan_objmgr_psoc *psoc,
 		qdf_mutex_release(&pm_ctx->qdf_conc_list_lock);
 	}
 
+	if (!policy_mgr_check_privacy_for_new_conn(pm_ctx)) {
+		policy_mgr_err("Don't allow new conn when wapi security conn existing");
+		goto done;
+	}
+
 	status = true;
 
 done:

umac/cmn_services/policy_mgr/src/wlan_policy_mgr_init_deinit.c

@@ -581,6 +581,8 @@ QDF_STATUS policy_mgr_register_hdd_cb(struct wlan_objmgr_psoc *psoc,
 		hdd_cbacks->get_mode_for_non_connected_vdev;
 	pm_ctx->hdd_cbacks.hdd_get_device_mode =
 		hdd_cbacks->hdd_get_device_mode;
+	pm_ctx->hdd_cbacks.hdd_wapi_security_sta_exist =
+		hdd_cbacks->hdd_wapi_security_sta_exist;
 
 	return QDF_STATUS_SUCCESS;
 }