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/*
* Copyright 2018-present Open Networking Foundation
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//Package adaptercoreonu provides the utility for onu devices, flows and statistics
package adaptercoreonu
import "context"
//Attention: this file is more or less a coopy of file olt_platform.go from the voltha-openolt-adapter
// which includes system wide definitions and thus normally should be stored more centrally (within some voltha libs)!!
/*=====================================================================
@TODO: Looks like this Flow id concept below is not used anywhere
Propose to remove the below documentation of Flow Id on confirmation
of the same
Flow id
Identifies a flow within a single OLT
Flow Id is unique per OLT
Multiple GEM ports can map to same flow id
13 11 4 0
+--------+--------------+------+
| pon id | onu id | Flow |
| | | idx |
+--------+--------------+------+
14 bits = 16384 flows (per OLT).
pon id = 4 bits = 16 PON ports
onu id = 7 bits = 128 ONUss per PON port
Flow index = 3 bits = 4 bi-directional flows per ONU
= 8 uni-directional flows per ONU
Logical (OF) UNI port number
OpenFlow port number corresponding to PON UNI
20 12 4 0
+--+--------+--------------+------+
|0 | pon id | onu id |uni id|
+--+--------+--------------+------+
pon id = 8 bits = 256 PON ports
onu id = 8 bits = 256 ONUs per PON port
Logical (OF) NNI port number
OpenFlow port number corresponding to PON NNI
20 0
+--+----------------------------+
|1 | intf_id |
+--+----------------------------+
No overlap with UNI port number space
PON OLT (OF) port number
OpenFlow port number corresponding to PON OLT ports
31 28 0
+--------+------------------------~~~------+
| 0x2 | pon intf id |
+--------+------------------------~~~------+
*/
const (
// Number of bits for the physical UNI of the ONUs
bitsForUniID = 4
// Number of bits for the ONU ID
bitsForONUID = 8
// Number of bits for PON ID
bitsForPONID = 8
/*
// Number of bits to differentiate between UNI and NNI Logical Port
bitsForUNINNIDiff = 1
*/
//maxOnusPerPon is Max number of ONUs on any PON port
maxOnusPerPon = (1 << bitsForONUID)
//maxPonsPerOlt is Max number of PON ports on any OLT
maxPonsPerOlt = (1 << bitsForPONID)
//maxUnisPerOnu is the Max number of UNI ports on any ONU
maxUnisPerOnu = (1 << bitsForUniID)
/*
//Bit position where the differentiation bit is located
nniUniDiffPos = (bitsForUniID + bitsForONUID + bitsForPONID)
//Bit position where the marker for PON port type of OF port is present
ponIntfMarkerPos = 28
//Value of marker used to distinguish PON port type of OF port
ponIntfMarkerValue = 0x2
// Number of bits for NNI ID
bitsforNNIID = 20
// minNniIntPortNum is used to store start range of nni port number (1 << 20) 1048576
minNniIntPortNum = (1 << bitsforNNIID)
// maxNniPortNum is used to store the maximum range of nni port number ((1 << 21)-1) 2097151
maxNniPortNum = ((1 << (bitsforNNIID + 1)) - 1)
*/
)
/*
//MinUpstreamPortID value
var minUpstreamPortID = 0xfffd
//MaxUpstreamPortID value
var maxUpstreamPortID = 0xfffffffd
var controllerPorts = []uint32{0xfffd, 0x7ffffffd, 0xfffffffd}
*/
//mkUniPortNum returns new UNIportNum based on intfID, onuID and uniID
func mkUniPortNum(ctx context.Context, intfID, onuID, uniID uint32) uint32 {
//extended for checks available in the python onu adapter:!!
var limit = int(intfID)
if limit > maxPonsPerOlt {
logger.Warn(ctx, "Warning: exceeded the MAX pons per OLT")
}
limit = int(onuID)
if limit > maxOnusPerPon {
logger.Warn(ctx, "Warning: exceeded the MAX ONUS per PON")
}
limit = int(uniID)
if limit > maxUnisPerOnu {
logger.Warn(ctx, "Warning: exceeded the MAX UNIS per ONU")
}
return (intfID << (bitsForUniID + bitsForONUID)) | (onuID << bitsForUniID) | uniID
}
/*
//onuIDFromPortNum returns ONUID derived from portNumber
func onuIDFromPortNum(portNum uint32) uint32 {
return (portNum >> bitsForUniID) & (maxOnusPerPon - 1)
}
//intfIDFromUniPortNum returns IntfID derived from portNum
func intfIDFromUniPortNum(portNum uint32) uint32 {
return (portNum >> (bitsForUniID + bitsForONUID)) & (maxPonsPerOlt - 1)
}
//uniIDFromPortNum return UniID derived from portNum
func uniIDFromPortNum(portNum uint32) uint32 {
return (portNum) & (maxUnisPerOnu - 1)
}
//intfIDToPortNo returns portId derived from intftype, intfId and portType
func intfIDToPortNo(intfID uint32, intfType voltha.Port_PortType) uint32 {
if (intfType) == voltha.Port_ETHERNET_NNI {
return (1 << nniUniDiffPos) | intfID
}
if (intfType) == voltha.Port_PON_OLT {
return (ponIntfMarkerValue << ponIntfMarkerPos) | intfID
}
return 0
}
//portNoToIntfID returns portnumber derived from interfaceID
func portNoToIntfID(portno uint32, intfType voltha.Port_PortType) uint32 {
if (intfType) == voltha.Port_ETHERNET_NNI {
return (1 << nniUniDiffPos) ^ portno
}
if (intfType) == voltha.Port_PON_OLT {
return (ponIntfMarkerValue << ponIntfMarkerPos) ^ portno
}
return 0
}
//intfIDFromNniPortNum returns Intf ID derived from portNum
func intfIDFromNniPortNum(portNum uint32) (uint32, error) {
if portNum < minNniIntPortNum || portNum > maxNniPortNum {
logger.Errorw(ctx,"NNIPortNumber is not in valid range", log.Fields{"portNum": portNum})
return uint32(0), errors.New("invalid-port-range") //olterrors.ErrInvalidPortRange
}
return (portNum & 0xFFFF), nil
}
//intfIDToPortTypeName returns port type derived from the intfId
func intfIDToPortTypeName(intfID uint32) voltha.Port_PortType {
if ((ponIntfMarkerValue << ponIntfMarkerPos) ^ intfID) < maxPonsPerOlt {
return voltha.Port_PON_OLT
}
if (intfID & (1 << nniUniDiffPos)) == (1 << nniUniDiffPos) {
return voltha.Port_ETHERNET_NNI
}
return voltha.Port_ETHERNET_UNI
}
//extractAccessFromFlow returns AccessDevice information
func extractAccessFromFlow(inPort, outPort uint32) (uint32, uint32, uint32, uint32) {
if isUpstream(outPort) {
return inPort, intfIDFromUniPortNum(inPort), onuIDFromPortNum(inPort), uniIDFromPortNum(inPort)
}
return outPort, intfIDFromUniPortNum(outPort), onuIDFromPortNum(outPort), uniIDFromPortNum(outPort)
}
//isUpstream returns true for Upstream and false for downstream
func isUpstream(outPort uint32) bool {
for _, port := range controllerPorts {
if port == outPort {
return true
}
}
return (outPort & (1 << nniUniDiffPos)) == (1 << nniUniDiffPos)
}
//isControllerBoundFlow returns true/false
func isControllerBoundFlow(outPort uint32) bool {
for _, port := range controllerPorts {
if port == outPort {
return true
}
}
return false
}
//onuIDFromUniPortNum returns onuId from give portNum information.
func onuIDFromUniPortNum(portNum uint32) uint32 {
return (portNum >> bitsForUniID) & (maxOnusPerPon - 1)
}
//flowExtractInfo fetches uniport from the flow, based on which it gets and returns ponInf, onuID, uniID, inPort and ethType
func flowExtractInfo(flow *ofp.OfpFlowStats, flowDirection string) (uint32, uint32, uint32, uint32, uint32, uint32, error) {
var uniPortNo uint32
var ponIntf uint32
var onuID uint32
var uniID uint32
var inPort uint32
var ethType uint32
if flowDirection == "upstream" {
if uniPortNo = flows.GetChildPortFromTunnelId(flow); uniPortNo == 0 {
for _, field := range flows.GetOfbFields(flow) {
if field.GetType() == flows.IN_PORT {
uniPortNo = field.GetPort()
break
}
}
}
} else if flowDirection == "downstream" {
if uniPortNo = flows.GetChildPortFromTunnelId(flow); uniPortNo == 0 {
for _, field := range flows.GetOfbFields(flow) {
if field.GetType() == flows.METADATA {
for _, action := range flows.GetActions(flow) {
if action.Type == flows.OUTPUT {
if out := action.GetOutput(); out != nil {
uniPortNo = out.GetPort()
}
break
}
}
} else if field.GetType() == flows.IN_PORT {
inPort = field.GetPort()
} else if field.GetType() == flows.ETH_TYPE {
ethType = field.GetEthType()
}
}
}
}
if uniPortNo == 0 {
return 0, 0, 0, 0, 0, 0, errors.New("notFound: pon-interface (flowDirection)")
// olterrors.NewErrNotFound("pon-interface", log.Fields{"flow-direction": flowDirection}, nil)
}
ponIntf = intfIDFromUniPortNum(uniPortNo)
onuID = onuIDFromUniPortNum(uniPortNo)
uniID = uniIDFromPortNum(uniPortNo)
logger.Debugw(ctx,"flow extract info result",
log.Fields{"uniPortNo": uniPortNo, "ponIntf": ponIntf,
"onuID": onuID, "uniID": uniID, "inPort": inPort, "ethType": ethType})
return uniPortNo, ponIntf, onuID, uniID, inPort, ethType, nil
}
*/