Datasheet

Errata—Intel

82599 10 GbE Controller

38 PCIe: Incorrect PCIe De-emphasis Level Might Be

Reported

Problem:

Current De-emphasis Level status bit in the Link Status 2 register in the PCIe configuration space

should reflect the level of de-emphasis configured by the upstream device.

By default, this bit shows the correct status of -6 db. If the upstream device requests the change of de-

emphasis during link training according to the PCIe 2.0 specification, the status shows correctly the

change to -3.5 db.

If the upstream device is incorrectly requesting a de-emphasis change late in the link training, after a

speed change (such as due to a BIOS misbehavior), the 82599 remains at the default -6 db as

expected. However, in this case, the Current De-emphasis Level status bit incorrectly shows -3.5 db.

Implication:

Incorrect de-emphasis level might be reported in Link Status 2 register.

Workaround:

None.

Status: B0=Yes; NoFix

39 APM Wake-Up Might Be Blocked if System Is

Shutdown Before Driver Load

Problem:

When the system is powered up and APM mode is enabled in the 82599 EEPROM, the device is able to

wake correctly from a power saving state even before the software driver is loaded for the first time.

According to APM specification, the 82599 is expected to be armed for further wake events even

without software driver intervention.

In the 82599 implementation upon a wake event, the Magic Packet Received bit is set in the WUS

wake event.

If an awake system is shutdown again before a software driver load, the Magic Packet Received bit that

was not cleared might block further WoL events.

Implication:

If the following events occur, in this order, this erratum might be observed:

1. WoL event

2. Software driver doesn't successfully load

3. System transitions to S3/S5 state

For example, if after a WoL event, a BSOD occurs during system boot and the system is shutdown

manually, a magic packet might not be able to wake the system.