qcacld-3.0: Add debugfs support for roam scan stats

Add debugfs entry to get last five roam scan stats info which includes
old bssid, new bssid, roaming candidates etc., for STA interface.

Change-Id: Ied66beb270d97b6e17a6116c1be0e82783094519
CRs-Fixed: 2203885

core/wma/inc/wma.h

@@ -835,6 +835,7 @@ struct roam_synch_frame_ind {
  * @vdev_stop_wakelock: wakelock to protect vdev stop op with firmware
  * @vdev_set_key_wakelock: wakelock to protect vdev set key op with firmware
  * @channel: channel
+ * @roam_scan_stats_req: cached roam scan stats request
  *
  * It stores parameters per vdev in wma.
  */
@@ -924,6 +925,7 @@ struct wma_txrx_node {
 	struct roam_synch_frame_ind roam_synch_frame_ind;
 	bool is_waiting_for_key;
 	uint8_t channel;
+	struct sir_roam_scan_stats *roam_scan_stats_req;
 };
 
 /**

core/wma/inc/wma_internal.h

@@ -1418,4 +1418,25 @@ int wma_vdev_bss_color_collision_info_handler(void *handle,
 
 int wma_twt_en_complete_event_handler(void *handle,
 				      uint8_t *event, uint32_t len);
+/**
+ * wma_get_roam_scan_stats() - Get roam scan stats request
+ * @handle: wma handle
+ * @req: request details
+ *
+ * Return: QDF_STATUS
+ */
+QDF_STATUS wma_get_roam_scan_stats(WMA_HANDLE handle,
+				   struct sir_roam_scan_stats *req);
+
+/**
+ * wma_roam_scan_stats_event_handler() - roam scan stats event handler
+ * @handle: wma handle
+ * @event: event data
+ * @len: length of data
+ *
+ * Return: Success or Failure status
+ */
+int wma_roam_scan_stats_event_handler(void *handle, uint8_t *event,
+				      uint32_t len);
+
 #endif

core/wma/inc/wma_types.h

@@ -455,6 +455,8 @@
 #define WMA_OBSS_COLOR_COLLISION_REQ         SIR_HAL_OBSS_COLOR_COLLISION_REQ
 #define WMA_OBSS_COLOR_COLLISION_INFO        SIR_HAL_OBSS_COLOR_COLLISION_INFO
 
+#define WMA_GET_ROAM_SCAN_STATS              SIR_HAL_GET_ROAM_SCAN_STATS
+
 /* Bit 6 will be used to control BD rate for Management frames */
 #define HAL_USE_BD_RATE2_FOR_MANAGEMENT_FRAME 0x40