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Error Events — Intel
®
82575EB Gigabit Ethernet Controller
324632-003 Intel
®
82575EB Gigabit Ethernet Controller
Revision: 2.1 Software Developer’s Manual and EEPROM Guide
January 2011 183
Bad TLP • Bad CRC.
• Illegal EDB.
• Wrong sequence number.
Correctable.
Send ERR_CORR.
TLP Initiate Nak; drop data.
Bad DLLP Bad CRC. Correctable.
Send ERR_CORR.
DLLP Drop.
Replay Timer
Timeout
Replay timer expiration. Correctable.
Send ERR_CORR.
Follow LL rules.
Replay Number
Rollover
Replay number rollover. Correctable.
Send ERR_CORR.
Follow LL rules.
Data Link Layer
Protocol Error
Received ACK/NACK not
corresponding to any TLP.
Uncorrectable.
Send ERR_FATAL.
Follow LL rules.
TLP Errors
Poisoned TLP
Received
TLP with error forwarding. Uncorrectable.
ERR_NONFATAL.
Log header.
A poisoned completion is ignored
and the request can be retried
after timeout. If enabled, the
error is reported.
Unsupported
Request (UR)
• Wrong configuration access.
• MRdLk.
• Configuration request type1.
• Unsupported vendor. Defined
type 0 message:
• Invalid MSG code.
• Unsupported TLP type.
• Wrong function number.
• Wrong traffic class or virtual
channel.
• Received target access with
data size larger than 64 bits.
• Received TLP outside address
range.
Uncorrectable.
ERR_NONFATAL.
Log header.
Send completion with UR.
Completion
Timeout
Completion Timeout timer
expired.
Uncorrectable.
ERR_NONFATAL.
Send the read request again
Completer Abort
(CA)
Attempts to write to the FLASH
device when writes are disabled
(FWE = 10b).
Uncorrectable.
ERR_NONFATAL.
Log header.
Send completion with CA.
Unexpected
Completion
Received completion without a
request for it (tag, ID, etc.).
Uncorrectable.
ERR_NONFATAL.
Log header.
Discard TLP.
Receiver Overflow Received TLP beyond allocated
credits.
Uncorrectable.
ERR_FATAL.
Receiver behavior is undefined.
Flow Control
Protocol Error
• Minimum initial flow control
advertisements.
• Flow control update for
infinite credit advertisement.
Uncorrectable.
ERR_FATAL.
Receiver behavior is undefined.
Table 58. Response and Reporting of Error Events
Error Types Error Events Default Severity Action