double QsfpModule::getQsfpSensor(SffField field,
double (*conversion)(uint16_t value)) {
auto info = SffFieldInfo::getSffFieldAddress(qsfpFields, field);
const uint8_t *data = getQsfpValuePtr(info.dataAddress,
info.offset, info.length);
return conversion(data[0] << 8 | data[1]);
}
uint8_t QsfpModule::getSettingsValue(SffField field, uint8_t mask) {
int offset;
int length;
int dataAddress;
getQsfpFieldAddress(field, dataAddress, offset, length);
const uint8_t* data = getQsfpValuePtr(dataAddress, offset, length);
return data[0] & mask;
}
FlagLevels QsfpModule::getQsfpSensorFlags(SffField fieldName) {
int offset;
int length;
int dataAddress;
/* Determine if QSFP is present */
getQsfpFieldAddress(fieldName, dataAddress, offset, length);
const uint8_t *data = getQsfpValuePtr(dataAddress, offset, length);
return getQsfpFlags(data, 4);
}
int QsfpModule::getQsfpCableLength(SffField field) {
int length;
auto info = SffFieldInfo::getSffFieldAddress(qsfpFields, field);
const uint8_t *data = getQsfpValuePtr(info.dataAddress,
info.offset, info.length);
auto multiplier = qsfpMultiplier.at(field);
length = *data * multiplier;
if (*data == MAX_CABLE_LEN) {
length = -(MAX_CABLE_LEN - 1) * multiplier;
}
return length;
}
/*
* Cable length is report as a single byte; each field has a
* specific multiplier to use to get the true length. For instance,
* single mode fiber length is specified in km, so the multiplier
* is 1000. In addition, the raw value of 255 indicates that the
* cable is longer than can be represented. We use a negative
* value of the appropriate magnitude to communicate that to thrift
* clients.
*/
double QsfpModule::getQsfpCableLength(SffField field) const {
double length;
auto info = SffFieldInfo::getSffFieldAddress(qsfpFields, field);
const uint8_t *data = getQsfpValuePtr(info.dataAddress,
info.offset, info.length);
auto multiplier = qsfpMultiplier.at(field);
length = *data * multiplier;
if (*data == EEPROM_DEFAULT) {
// TODO: does this really mean the cable is too long?
length = -(EEPROM_DEFAULT - 1) * multiplier;
}
return length;
}
std::string QsfpModule::getQsfpString(SffField field) const {
int offset;
int length;
int dataAddress;
getQsfpFieldAddress(field, dataAddress, offset, length);
const uint8_t *data = getQsfpValuePtr(dataAddress, offset, length);
while (length > 0 && data[length - 1] == ' ') {
--length;
}
return std::string(reinterpret_cast<const char*>(data), length);
}
int QsfpModule::getQsfpDACGauge() const {
auto info = SffFieldInfo::getSffFieldAddress(qsfpFields, SffField::DAC_GAUGE);
const uint8_t *val = getQsfpValuePtr(info.dataAddress,
info.offset, info.length);
//Guard against FF default value
auto gauge = *val;
if (gauge == EEPROM_DEFAULT) {
return 0;
} else if (gauge > MAX_GAUGE) {
// HACK: We never use cables with more than 30 (in decimal) gauge
// However, some vendors put in hex values. For example, some put
// 0x28 to represent 28 gauge cable (why?!?), which we would
// incorrectly interpret as 40 if using decimal. This converts
// values > 30 to the hex value.
return (gauge / HEX_BASE) * DECIMAL_BASE + gauge % HEX_BASE;
} else{
return gauge;
}
}
TransmitterTechnology QsfpModule::getQsfpTransmitterTechnology() {
auto info = SffFieldInfo::getSffFieldAddress(qsfpFields,
SffField::DEVICE_TECHNOLOGY);
try {
const uint8_t* data =
getQsfpValuePtr(info.dataAddress, info.offset, info.length);
uint8_t transTech = *data >> DeviceTechnology::TRANSMITTER_TECH_SHIFT;
if (transTech == DeviceTechnology::UNKNOWN_VALUE) {
return TransmitterTechnology::UNKNOWN;
} else if (transTech <= DeviceTechnology::OPTICAL_MAX_VALUE) {
return TransmitterTechnology::OPTICAL;
} else {
return TransmitterTechnology::COPPER;
}
} catch (const std::exception& e) {
LOG(INFO) << " Unable to get transmitter technology for QSFP: "
<< qsfpImpl_->getName();
}
return TransmitterTechnology::UNKNOWN;
}
ThresholdLevels QsfpModule::getThresholdValues(SffField field,
double (*conversion)(uint16_t value)) {
int offset;
int length;
int dataAddress;
ThresholdLevels thresh;
CHECK(!flatMem_);
getQsfpFieldAddress(field, dataAddress, offset, length);
const uint8_t *data = getQsfpValuePtr(dataAddress, offset, length);
CHECK_GE(length, 8);
thresh.alarm.high = conversion(data[0] << 8 | data[1]);
thresh.alarm.low = conversion(data[2] << 8 | data[3]);
thresh.warn.high = conversion(data[4] << 8 | data[5]);
thresh.warn.low = conversion(data[6] << 8 | data[7]);
return thresh;
}
void QsfpModule::setPowerOverrideIfSupported(PowerControlState currentState) {
/* Wedge forces Low Power mode via a pin; we have to reset this
* to force High Power mode on all transceivers except SR4-40G.
*
* Note that this function expects to be called with qsfpModuleMutex_
* held.
*/
int offset;
int length;
int dataAddress;
getQsfpFieldAddress(SffField::ETHERNET_COMPLIANCE, dataAddress,
offset, length);
const uint8_t *ether = getQsfpValuePtr(dataAddress, offset, length);
getQsfpFieldAddress(SffField::EXTENDED_IDENTIFIER, dataAddress,
offset, length);
const uint8_t *extId = getQsfpValuePtr(dataAddress, offset, length);
auto desiredSetting = PowerControlState::POWER_OVERRIDE;
// SR4-40G is represented by a value of 2 - SFF-8636
// This is the only transceiver that should use LP mode
if (*ether == EthernetCompliance::SR4_40GBASE) {
desiredSetting = PowerControlState::POWER_LPMODE;
} else {
uint8_t highPowerLevel = (*extId & EXT_ID_HI_POWER_MASK);
if (highPowerLevel > 0) {
desiredSetting = PowerControlState::HIGH_POWER_OVERRIDE;
}
}
auto portStr = folly::to<std::string>(qsfpImpl_->getName());
VLOG(1) << "Port " << portStr << ": Power control "
<< _PowerControlState_VALUES_TO_NAMES.find(currentState)->second
<< " Ext ID " << std::hex << (int) *extId
<< " Ethernet compliance " << std::hex << (int) *ether
<< " Desired power control "
<< _PowerControlState_VALUES_TO_NAMES.find(desiredSetting)->second;
if (currentState == desiredSetting) {
LOG(INFO) << "Port: " << folly::to<std::string>(qsfpImpl_->getName()) <<
" Power override already correctly set, doing nothing";
return;
}
uint8_t power = uint8_t(PowerControl::POWER_OVERRIDE);
if (desiredSetting == PowerControlState::HIGH_POWER_OVERRIDE) {
power = uint8_t(PowerControl::HIGH_POWER_OVERRIDE);
} else if (desiredSetting == PowerControlState::POWER_LPMODE) {
power = uint8_t(PowerControl::POWER_LPMODE);
}
getQsfpFieldAddress(SffField::POWER_CONTROL, dataAddress,
offset, length);
qsfpImpl_->writeTransceiver(TransceiverI2CApi::ADDR_QSFP,
offset, sizeof(power), &power);
LOG(INFO) << "Port " << portStr
<< ": QSFP set to power setting "
<< _PowerControlState_VALUES_TO_NAMES.find(desiredSetting)->second
<< " (" << int(power) << ")";
}
void QsfpModule::getQsfpValue(int dataAddress, int offset, int length,
uint8_t* data) const {
const uint8_t *ptr = getQsfpValuePtr(dataAddress, offset, length);
memcpy(data, ptr, length);
}
bool QsfpModule::getSensorsPerChanInfo(std::vector<Channel>& channels) {
int offset;
int length;
int dataAddress;
/*
* Interestingly enough, the QSFP stores the four alarm flags
* (alarm high, alarm low, warning high, warning low) in two bytes by
* channel in order 2, 1, 4, 3; by using this set of offsets, we
* should be able to read them in order, by reading the appriopriate
* bit offsets combined with a byte offset into the data.
*
* That is, read bits 4 through 7 of the first byte, then 0 through 3,
* then 4 through 7 of the second byte, and so on. Ugh.
*/
int bitOffset[] = {4, 0, 4, 0};
int byteOffset[] = {0, 0, 1, 1};
getQsfpFieldAddress(SffField::CHANNEL_RX_PWR_ALARMS, dataAddress,
offset, length);
const uint8_t *data = getQsfpValuePtr(dataAddress, offset, length);
for (int channel = 0; channel < CHANNEL_COUNT; channel++) {
channels[channel].sensors.rxPwr.flags =
getQsfpFlags(data + byteOffset[channel], bitOffset[channel]);
channels[channel].sensors.rxPwr.__isset.flags = true;
}
getQsfpFieldAddress(SffField::CHANNEL_TX_BIAS_ALARMS, dataAddress,
offset, length);
data = getQsfpValuePtr(dataAddress, offset, length);
for (int channel = 0; channel < CHANNEL_COUNT; channel++) {
channels[channel].sensors.txBias.flags =
getQsfpFlags(data + byteOffset[channel], bitOffset[channel]);
channels[channel].sensors.txBias.__isset.flags = true;
}
getQsfpFieldAddress(SffField::CHANNEL_TX_PWR_ALARMS, dataAddress,
offset, length);
data = getQsfpValuePtr(dataAddress, offset, length);
for (int channel = 0; channel < CHANNEL_COUNT; channel++) {
channels[channel].sensors.txPwr.flags =
getQsfpFlags(data + byteOffset[channel], bitOffset[channel]);
channels[channel].sensors.txPwr.__isset.flags = true;
}
getQsfpFieldAddress(SffField::CHANNEL_RX_PWR, dataAddress,
offset, length);
data = getQsfpValuePtr(dataAddress, offset, length);
for (auto& channel : channels) {
uint16_t value = data[0] << 8 | data[1];
channel.sensors.rxPwr.value = SffFieldInfo::getPwr(value);
data += 2;
length--;
}
CHECK_GE(length, 0);
getQsfpFieldAddress(SffField::CHANNEL_TX_BIAS, dataAddress,
offset, length);
data = getQsfpValuePtr(dataAddress, offset, length);
for (auto& channel : channels) {
uint16_t value = data[0] << 8 | data[1];
channel.sensors.txBias.value = SffFieldInfo::getTxBias(value);
data += 2;
length--;
}
CHECK_GE(length, 0);
getQsfpFieldAddress(SffField::CHANNEL_TX_PWR, dataAddress,
offset, length);
data = getQsfpValuePtr(dataAddress, offset, length);
for (auto& channel : channels) {
uint16_t value = data[0] << 8 | data[1];
channel.sensors.txPwr.value = SffFieldInfo::getPwr(value);
data += 2;
length--;
}
CHECK_GE(length, 0);
return true;
}
void QsfpModule::customizeTransceiver() {
/*
* Determine whether we need to customize any of the QSFP registers.
* Wedge forces Low Power mode via a pin; we have to reset this
* to force High Power mode on LR4s.
*
* Note that this function expects to be called with qsfpModuleMutex_
* held.
*/
if (dirty_ == true) {
return;
}
int offset;
int length;
int dataAddress;
getQsfpFieldAddress(SffField::EXTENDED_IDENTIFIER, dataAddress,
offset, length);
const uint8_t *extId = getQsfpValuePtr(dataAddress, offset, length);
getQsfpFieldAddress(SffField::ETHERNET_COMPLIANCE, dataAddress,
offset, length);
const uint8_t *ethCompliance = getQsfpValuePtr(dataAddress, offset, length);
int pwrCtrlAddress;
int pwrCtrlOffset;
int pwrCtrlLength;
getQsfpFieldAddress(SffField::POWER_CONTROL, pwrCtrlAddress,
pwrCtrlOffset, pwrCtrlLength);
const uint8_t *pwrCtrl = getQsfpValuePtr(pwrCtrlAddress,
pwrCtrlOffset, pwrCtrlLength);
/*
* It is not clear whether we'll have to use some of these values
* in future to determine whether or not to set the high power override.
* Leave the logging in until this is fully debugged -- this should
* only trigger on QSFP insertion.
*/
VLOG(1) << "Port: " << folly::to<std::string>(qsfpImpl_->getName()) <<
" QSFP Ext ID " << std::hex << (int) *extId <<
" Ether Compliance " << std::hex << (int) *ethCompliance <<
" Power Control " << std::hex << (int) *pwrCtrl;
int highPowerLevel = (*extId & EXT_ID_HI_POWER_MASK);
int powerLevel = (*extId & EXT_ID_MASK) >> EXT_ID_SHIFT;
if (highPowerLevel > 0 || powerLevel > 0) {
uint8_t power = POWER_OVERRIDE;
if (highPowerLevel > 0) {
power |= HIGH_POWER_OVERRIDE;
}
// Note that we don't have to set the page here, but there should
// probably be a setQsfpValue() function to handle pages, etc.
if (pwrCtrlAddress != QsfpPages::LOWER) {
throw FbossError("QSFP failed to set POWER_CONTROL for LR4 "
"due to incorrect page number");
}
if (pwrCtrlLength != sizeof(power)) {
throw FbossError("QSFP failed to set POWER_CONTROL for LR4 "
"due to incorrect length");
}
qsfpImpl_->writeTransceiver(0x50, pwrCtrlOffset, sizeof(power), &power);
LOG(INFO) << "Port: " << folly::to<std::string>(qsfpImpl_->getName()) <<
" QSFP set to override low power";
}
}