Datasheet

Errata—Intel

82599 10 GbE Controller

2.4 Errata

Note: If the errata applies to a stepping, “Yes” is indicated for the stepping (for example:

“B0=Yes” indicates errata applies to stepping B0). If the errata does not apply to the

stepping, “No” is indicated (for example: “B0=No” indicates the errata does not apply to

stepping B0).

1 Cause of Interrupt Might Never Be Cleared

Problem:

If the cause of an interrupt is set by the Extended Interrupt Cause Set (EICS) register writing just

before the interrupt line is set, then it might not be cleared. This means that there might be a deadlock

that prevents the interrupt line from rising.

This erratum only occurs when all three modes referenced are used at the same time: non-PBA mode,

Auto Clear (of the cause), No Auto Mask.

PBA is Pending Bit Array mode. During this mode the device is able to capture additional interrupts

during the interval between initial interrupt and driver access to the device.

Implication:

The device stops issuing interrupts.

Workaround:

When operating using the above configurations, software should manually clear the cause by writing a

1b to the specific bit in the relevant EICR/EICR1/EICR2/VTEICR0-63 register (after the interrupt occurs

and the EICS was written). This workaround is included in Intel drivers.

Status: B0=Yes; NoFix

2 Flow Director: Length-Error Bit not Updated on

Remove Operation

Problem:

In order to avoid high latency, the length of the Flow Director (FD) filters linked list is limited. The

length limit is programmable (FDIRCTRL.Max-Length field). If a linked list exceeds this limit, a length

error is reported in the FDIRErr.length field in the Rx descriptor.

This erratum exists because once a filter is assigned to have the length-error attribute, it stays with

this attribute even if an error condition doesn't exist anymore (such as a previous filter was removed

from the list).

Implication:

When the FD table is programmed with many filters while dynamic filter removal is used, the driver

might get an indication for over length lists (FDIRErr.length) even though the linked lists are not too

long. This indication could be used by the software driver to remove filters from the table. Note that the

current software driver does not use the dynamic filter removal option.