qcacld-3.0: Dump disconnect stats

Add a new dumpStats parameter (25) to dump disconnect stats.
The following command will dump disconnect Stats into QXDM.
>iwpriv wlan0 dumpStats 25

Change-Id: I0908c947b5c829f51b087871ad11d5674908dca2
CRs-Fixed: 2058958

core/hdd/src/wlan_hdd_wext.c

@@ -3228,6 +3228,10 @@ int hdd_wlan_dump_stats(struct hdd_adapter *adapter, int value)
 			ret = EFAULT;
 		}
 		break;
+	case CDP_DISCONNECT_STATS:
+		sme_display_disconnect_stats(WLAN_HDD_GET_HAL_CTX(adapter),
+						adapter->sessionId);
+		break;
 	default:
 		status = cdp_display_stats(cds_get_context(QDF_MODULE_ID_SOC),
 							value);

core/mac/src/pe/lim/lim_link_monitoring_algo.c

@@ -248,8 +248,8 @@ void lim_delete_sta_context(tpAniSirGlobal mac_ctx,
 				eSIR_MAC_DISASSOC_DUE_TO_INACTIVITY_REASON,
 				msg->addr2, session_entry, false);
 			lim_tear_down_link_with_ap(mac_ctx,
-						session_entry->peSessionId,
-						eSIR_MAC_UNSPEC_FAILURE_REASON);
+				session_entry->peSessionId,
+				eSIR_MAC_DISASSOC_DUE_TO_INACTIVITY_REASON);
 			/* only break for STA role (non TDLS) */
 			break;
 		}

core/sme/inc/csr_internal.h

@@ -851,6 +851,24 @@ struct scan_cmd_info {
 	tListElem *roambssentry;
 };
 
+/**
+ * struct csr_disconnect_stats - Disconnect Stats per session
+ * @disconnection_cnt: total no. of disconnections
+ * @disconnection_by_app: diconnections triggered by application
+ * @disassoc_by_peer: disassoc sent by peer
+ * @deauth_by_peer: deauth sent by peer
+ * @bmiss: disconnect triggered by beacon miss
+ * @peer_kickout: disconnect triggered by peer kickout
+ */
+struct csr_disconnect_stats {
+	uint32_t disconnection_cnt;
+	uint32_t disconnection_by_app;
+	uint32_t disassoc_by_peer;
+	uint32_t deauth_by_peer;
+	uint32_t bmiss;
+	uint32_t peer_kickout;
+};
+
 struct csr_roam_session {
 	uint8_t sessionId;      /* Session ID */
 	bool sessionActive;     /* true if it is used */
@@ -970,6 +988,7 @@ struct csr_roam_session {
 	qdf_mc_timer_t roaming_offload_timer;
 	bool is_fils_connection;
 	uint16_t fils_seq_num;
+	struct csr_disconnect_stats disconnect_stats;
 };
 
 struct csr_roamstruct {

core/sme/inc/sme_api.h

@@ -1722,4 +1722,13 @@ QDF_STATUS sme_get_valid_channels(uint8_t *chan_list, uint32_t *list_len);
  * Return: pointer to pmac context
  */
 tpAniSirGlobal sme_get_mac_context(void);
+
+/**
+ * sme_display_disconnect_stats() - Display per session Disconnect stats
+ * @hal: hal global context
+ * session_id: SME session id
+ *
+ * Return: None
+ */
+void sme_display_disconnect_stats(tHalHandle hal, uint8_t session_id);
 #endif /* #if !defined( __SME_API_H ) */

core/sme/src/common/sme_api.c

@@ -16630,3 +16630,39 @@ QDF_STATUS sme_get_chain_rssi(tHalHandle hal,
 	SME_EXIT();
 	return status;
 }
+
+void sme_display_disconnect_stats(tHalHandle hal, uint8_t session_id)
+{
+	struct csr_roam_session *session;
+	tpAniSirGlobal mac_ctx = PMAC_STRUCT(hal);
+
+	if (!CSR_IS_SESSION_VALID(mac_ctx, session_id)) {
+		sme_err("%s Invalid session id: %d", __func__, session_id);
+		return;
+	}
+
+	session = CSR_GET_SESSION(mac_ctx, session_id);
+	if (!session) {
+		sme_err("%s Failed to get session for id: %d",
+			__func__, session_id);
+		return;
+	}
+
+	sme_debug("Total No. of Disconnections: %d",
+		  session->disconnect_stats.disconnection_cnt);
+
+	sme_debug("No. of Diconnects Triggered by Application: %d",
+		  session->disconnect_stats.disconnection_by_app);
+
+	sme_debug("No. of Disassoc Sent by Peer: %d",
+		  session->disconnect_stats.disassoc_by_peer);
+
+	sme_debug("No. of Deauth Sent by Peer: %d",
+		  session->disconnect_stats.deauth_by_peer);
+
+	sme_debug("No. of Disconnections due to Beacon Miss: %d",
+		  session->disconnect_stats.bmiss);
+
+	sme_debug("No. of Disconnections due to Peer Kickout: %d",
+		  session->disconnect_stats.peer_kickout);
+}

core/sme/src/csr/csr_api_roam.c

@@ -11168,6 +11168,11 @@ csr_roam_chk_lnk_disassoc_ind(tpAniSirGlobal mac_ctx, tSirSmeRsp *msg_ptr)
 		qdf_mem_free(cmd);
 		return;
 	}
+
+	/* Update the disconnect stats */
+	session->disconnect_stats.disconnection_cnt++;
+	session->disconnect_stats.disassoc_by_peer++;
+
 	if (csr_is_conn_state_infra(mac_ctx, sessionId))
 		session->connectState = eCSR_ASSOC_STATE_TYPE_NOT_CONNECTED;
 #ifndef WLAN_MDM_CODE_REDUCTION_OPT
@@ -11278,6 +11283,30 @@ csr_roam_chk_lnk_deauth_ind(tpAniSirGlobal mac_ctx, tSirSmeRsp *msg_ptr)
 		return;
 	}
 
+	/* Update the disconnect stats */
+	switch (pDeauthInd->reasonCode) {
+	case eSIR_MAC_DISASSOC_DUE_TO_INACTIVITY_REASON:
+		session->disconnect_stats.disconnection_cnt++;
+		session->disconnect_stats.peer_kickout++;
+		break;
+	case eSIR_MAC_UNSPEC_FAILURE_REASON:
+	case eSIR_MAC_PREV_AUTH_NOT_VALID_REASON:
+	case eSIR_MAC_DEAUTH_LEAVING_BSS_REASON:
+	case eSIR_MAC_CLASS2_FRAME_FROM_NON_AUTH_STA_REASON:
+	case eSIR_MAC_CLASS3_FRAME_FROM_NON_ASSOC_STA_REASON:
+	case eSIR_MAC_STA_NOT_PRE_AUTHENTICATED_REASON:
+		session->disconnect_stats.disconnection_cnt++;
+		session->disconnect_stats.deauth_by_peer++;
+		break;
+	case eSIR_BEACON_MISSED:
+		session->disconnect_stats.disconnection_cnt++;
+		session->disconnect_stats.bmiss++;
+		break;
+	default:
+		/* Unknown reason code */
+		break;
+	}
+
 	if (csr_is_conn_state_infra(mac_ctx, sessionId))
 		session->connectState = eCSR_ASSOC_STATE_TYPE_NOT_CONNECTED;
 #ifndef WLAN_MDM_CODE_REDUCTION_OPT
@@ -15364,6 +15393,11 @@ QDF_STATUS csr_send_mb_disassoc_req_msg(tpAniSirGlobal pMac, uint32_t sessionId,
 	pMsg->reasonCode = reasonCode;
 	pMsg->process_ho_fail = (pSession->disconnect_reason ==
 		eCSR_DISCONNECT_REASON_ROAM_HO_FAIL) ? true : false;
+
+	/* Update the disconnect stats */
+	pSession->disconnect_stats.disconnection_cnt++;
+	pSession->disconnect_stats.disconnection_by_app++;
+
 	/*
 	 * The state will be DISASSOC_HANDOFF only when we are doing
 	 * handoff. Here we should not send the disassoc over the air
@@ -15558,6 +15592,10 @@ QDF_STATUS csr_send_mb_deauth_req_msg(tpAniSirGlobal pMac, uint32_t sessionId,
 	qdf_mem_copy(&pMsg->peer_macaddr.bytes, bssId, QDF_MAC_ADDR_SIZE);
 	pMsg->reasonCode = reasonCode;
 
+	/* Update the disconnect stats */
+	pSession->disconnect_stats.disconnection_cnt++;
+	pSession->disconnect_stats.disconnection_by_app++;
+
 	return umac_send_mb_message_to_mac(pMsg);
 }