qcacmn: Changes for PER based roaming

DUT should be able to roam to a better access point if current
AP is having congestion/packet error.

This roam also devise a new selection logic for candidate
selection which considers channel congestion and AP capabilities.

Change-Id: I6cffbf0de059a218e971be32fbdc1a0092ceea9d
CRs-Fixed: 1090934

wmi_unified_api.h

@@ -854,6 +854,16 @@ QDF_STATUS wmi_unified_roam_scan_offload_rssi_change_cmd(void *wmi_hdl,
 			  uint32_t bcn_rssi_weight,
 			  uint32_t hirssi_delay_btw_scans);
 
+/**
+ * wmi_unified_set_per_roam_config() - set PER roam config in FW
+ * @wmi_hdl: wmi handle
+ * @req_buf: per roam config request buffer
+ *
+ * Return: QDF_STATUS_SUCCESS on success and QDF_STATUS_E_FAILURE for failure
+ */
+QDF_STATUS wmi_unified_set_per_roam_config(void *wmi_hdl,
+		struct wmi_per_roam_config_req *req_buf);
+
 QDF_STATUS wmi_unified_get_buf_extscan_hotlist_cmd(void *wmi_hdl,
 				   struct ext_scan_setbssi_hotlist_params *
 				   photlist, int *buf_len);

wmi_unified_param.h

@@ -6949,6 +6949,45 @@ struct wmi_adaptive_dwelltime_params {
 	uint8_t wifi_act_threshold;
 };
 
+/**
+ * struct wmi_per_roam_config - per based roaming parameters
+ * @enable: if PER based roaming is enabled/disabled
+ * @tx_high_rate_thresh: high rate threshold at which PER based
+ *     roam will stop in tx path
+ * @rx_high_rate_thresh: high rate threshold at which PER based
+ *     roam will stop in rx path
+ * @tx_low_rate_thresh: rate below which traffic will be considered
+ *     for PER based roaming in Tx path
+ * @rx_low_rate_thresh: rate below which traffic will be considered
+ *     for PER based roaming in Tx path
+ * @tx_rate_thresh_percnt: % above which when traffic is below low_rate_thresh
+ *     will be considered for PER based scan in tx path
+ * @rx_rate_thresh_percnt: % above which when traffic is below low_rate_thresh
+ *     will be considered for PER based scan in rx path
+ * @per_rest_time: time for which PER based roam will wait once it
+ *     issues a roam scan.
+ */
+struct wmi_per_roam_config {
+	uint32_t enable;
+	uint32_t tx_high_rate_thresh;
+	uint32_t rx_high_rate_thresh;
+	uint32_t tx_low_rate_thresh;
+	uint32_t rx_low_rate_thresh;
+	uint32_t tx_rate_thresh_percnt;
+	uint32_t rx_rate_thresh_percnt;
+	uint32_t per_rest_time;
+};
+
+/**
+ * struct wmi_per_roam_config_req: PER based roaming config request
+ * @vdev_id: vdev id on which config needs to be set
+ * @per_config: PER config
+ */
+struct wmi_per_roam_config_req {
+	uint8_t vdev_id;
+	struct wmi_per_roam_config per_config;
+};
+
 /**
  * struct wmi_fw_dump_seg_req - individual segment details
  * @seg_id - segment id.

wmi_unified_priv.h

@@ -720,6 +720,9 @@ QDF_STATUS (*send_roam_scan_offload_rssi_change_cmd)(wmi_unified_t wmi_handle,
 	uint32_t bcn_rssi_weight,
 	uint32_t hirssi_delay_btw_scans);
 
+QDF_STATUS (*send_per_roam_config_cmd)(wmi_unified_t wmi_handle,
+		struct wmi_per_roam_config_req *req_buf);
+
 QDF_STATUS (*send_get_buf_extscan_hotlist_cmd)(wmi_unified_t wmi_handle,
 				   struct ext_scan_setbssi_hotlist_params *
 				   photlist, int *buf_len);