Add QCA vendor interface to configure allowed bands for roaming

Add a QCA vendor attribute to configure the driver/firmware the allowed
bands for roaming by userpace. This attribute is also used to get the
configured roam bands from the driver.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>

src/common/qca-vendor.h

@@ -4664,6 +4664,13 @@ enum qca_vendor_attr_roam_candidate_selection_criteria {
  *	threshold value specified by the
  *	QCA_ATTR_ROAM_CONTROL_CANDIDATE_RSSI_THRESHOLD attribute shall be used.
  *
+ * @QCA_ATTR_ROAM_CONTROL_BAND_MASK: Unsigned 32-bit value.
+ *	Carries bitmask value of bits from &enum qca_set_band and represents
+ *	all the bands in which roaming is allowed. The configuration is valid
+ *	until next disconnection. If this attribute is not present, the
+ *	existing configuration shall be used. By default, roaming is allowed on
+ *	all bands supported by the local device. When the value is set to
+ *	%QCA_SETBAND_AUTO, all supported bands shall be enabled.
  */
 enum qca_vendor_attr_roam_control {
 	QCA_ATTR_ROAM_CONTROL_ENABLE = 1,
@@ -4682,6 +4689,7 @@ enum qca_vendor_attr_roam_control {
 	QCA_ATTR_ROAM_CONTROL_CANDIDATE_RSSI_THRESHOLD_2P4GHZ = 14,
 	QCA_ATTR_ROAM_CONTROL_CANDIDATE_RSSI_THRESHOLD_5GHZ = 15,
 	QCA_ATTR_ROAM_CONTROL_CANDIDATE_RSSI_THRESHOLD_6GHZ = 16,
+	QCA_ATTR_ROAM_CONTROL_BAND_MASK = 17,
 
 	/* keep last */
 	QCA_ATTR_ROAM_CONTROL_AFTER_LAST,