qcacmn: Add new attribute for roam reason

Currently, there is no attribute to get information for roam reason.

Atrribute QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_REASON is added in
QCA_NL80211_VENDOR_SUBCMD_KEY_MGMT_ROAM_AUTH command to inform
the roam reason. An enum qca_roam_reason is defined for the valid
values of the QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_ROAM_REASON.

Change-Id: I7f51e1c0905840235098600530bb027f6badb76e
CRs-Fixed: 2425898

os_if/linux/qca_vendor.h

@@ -2305,6 +2305,51 @@ enum qca_roaming_policy {
 	QCA_ROAMING_ALLOWED_WITHIN_ESS,
 };
 
+/**
+ * enum qca_roam_reason - Represents the reason codes for roaming. Used by
+ * QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_REASON.
+ *
+ * @QCA_ROAM_REASON_UNKNOWN: Any reason that do not classify under the below
+ * reasons.
+ *
+ * @QCA_ROAM_REASON_PER: Roam triggered when packet error rates(PER) breached
+ * the configured threshold.
+ *
+ * @QCA_ROAM_REASON_BEACON_MISS: Roam triggered due to the continuous configured
+ * beacon misses from the then connected AP.
+ *
+ * @QCA_ROAM_REASON_POOR_RSSI: Roam triggered due to the poor RSSI reported
+ * by the connected AP.
+ *
+ * @QCA_ROAM_REASON_BETTER_RSSI: Roam triggered for finding a BSSID with a
+ * better RSSI than the connected BSSID. Here the RSSI of the current BSSID is
+ * not poor.
+ *
+ * @QCA_ROAM_REASON_CONGESTION: Roam triggered considering the connected channel
+ * or environment being very noisy / congested.
+ *
+ * @QCA_ROAM_REASON_EXPLICIT_REQUEST: Roam triggered due to an explicit request
+ * from the user (user space).
+ *
+ * @QCA_ROAM_REASON_BTM: Roam triggered due to BTM request frame received from
+ * connected AP.
+ *
+ * @QCA_ROAM_REASON_BSS_LOAD: Roam triggered due to the channel utilization
+ * breaching out the configured threshold.
+ *
+ */
+enum qca_roam_reason {
+	QCA_ROAM_REASON_UNKNOWN,
+	QCA_ROAM_REASON_PER,
+	QCA_ROAM_REASON_BEACON_MISS,
+	QCA_ROAM_REASON_POOR_RSSI,
+	QCA_ROAM_REASON_BETTER_RSSI,
+	QCA_ROAM_REASON_CONGESTION,
+	QCA_ROAM_REASON_USER_TRIGGER,
+	QCA_ROAM_REASON_BTM,
+	QCA_ROAM_REASON_BSS_LOAD,
+};
+
 /**
  * enum qca_wlan_vendor_attr_roam_auth - vendor event for roaming
  * @QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_BSSID: BSSID of the roamed AP
@@ -2335,6 +2380,9 @@ enum qca_roaming_policy {
  * @QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_PMKID: AUTH PMKID
  * @QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_FILS_ERP_NEXT_SEQ_NUM: FILS erp next
  * seq number
+ * @QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_REASON: A 16-bit unsigned value
+ * representing the reasons for the roaming. Defined by enum
+ * qca_roam_reason.
  */
 enum qca_wlan_vendor_attr_roam_auth {
 	QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_INVALID = 0,
@@ -2351,6 +2399,7 @@ enum qca_wlan_vendor_attr_roam_auth {
 	QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_PMK,
 	QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_PMKID,
 	QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_FILS_ERP_NEXT_SEQ_NUM,
+	QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_REASON,
 	QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_AFTER_LAST,
 	QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_MAX =
 		QCA_WLAN_VENDOR_ATTR_ROAM_AUTH_AFTER_LAST - 1