qcacmn: Define QCA vendor attribute for high RSSI roam trigger threshold

Define an attribute for high RSSI roam trigger threshold. STA is
expected to trigger roam if the current connected AP's RSSI gets above
this high RSSI threshold. STA's roam attempt on high RSSI threshold aims
to find candidates from other better Wi-Fi bands.

Change-Id: Ie0323ff990e2679fd9768d2242730f7369cdb64f
CRs-Fixed: 3586127

os_if/linux/qca_vendor.h

@@ -3376,7 +3376,10 @@ enum qca_vendor_attr_scan_freq_list_scheme {
  *	due to poor RSSI of the connected AP.
  * @QCA_ROAM_TRIGGER_REASON_BETTER_RSSI: Set if the roam has to be triggered
  *	upon finding a BSSID with a better RSSI than the connected BSSID.
- *	Here the RSSI of the current BSSID need not be poor.
+ *	Also, set if the roam has to be triggered due to the high RSSI of the
+ *	current connected AP (better than
+ *	QCA_ATTR_ROAM_CONTROL_CONNECTED_HIGH_RSSI_OFFSET). Here the RSSI of
+ *	the current BSSID need not be poor.
  * @QCA_ROAM_TRIGGER_REASON_PERIODIC: Set if the roam has to be triggered
  *	by triggering a periodic scan to find a better AP to roam.
  * @QCA_ROAM_TRIGGER_REASON_DENSE: Set if the roam has to be triggered
@@ -3822,6 +3825,16 @@ enum qca_vendor_attr_roam_candidate_selection_criteria {
  *	    discovered.
  *	The default behavior if this flag is not specified is to include all
  *	the supported 6 GHz PSC frequencies in the roam full scan.
+ *
+ * @QCA_ATTR_ROAM_CONTROL_CONNECTED_HIGH_RSSI_OFFSET: Unsigned 8-bit value.
+ *	This attribute signifies the RSSI offset that is added to low RSSI
+ *	threshold (QCA_ATTR_ROAM_CONTROL_CONNECTED_LOW_RSSI_THRESHOLD) to imply
+ *	high RSSI threshold. STA is expected to trigger roam if the current
+ *	connected AP's RSSI gets above this high RSSI threshold. STA's roam
+ *	attempt on high RSSI threshold aims to find candidates from other
+ *	better Wi-Fi bands. E.g., STA would initially connect to a 2.4 GHz BSSID
+ *	and would migrate to 5/6 GHz when it comes closer to the AP (high RSSI
+ *	for 2.4 GHz BSS).
  */
 enum qca_vendor_attr_roam_control {
 	QCA_ATTR_ROAM_CONTROL_ENABLE = 1,
@@ -3845,6 +3858,7 @@ enum qca_vendor_attr_roam_control {
 	QCA_ATTR_ROAM_CONTROL_HO_DELAY_FOR_RX = 25,
 	QCA_ATTR_ROAM_CONTROL_FULL_SCAN_NO_REUSE_PARTIAL_SCAN_FREQ = 26,
 	QCA_ATTR_ROAM_CONTROL_FULL_SCAN_6GHZ_ONLY_ON_PRIOR_DISCOVERY = 27,
+	QCA_ATTR_ROAM_CONTROL_CONNECTED_HIGH_RSSI_OFFSET = 31,
 
 	/* keep last */
 	QCA_ATTR_ROAM_CONTROL_AFTER_LAST,