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IDT Theory of Operation
Notes
PES48H12G2 User Manual
Express
ACS Check
Specifica-
tion
Section
ACS Source Validation
6.12.1.1
ACS Translation Block-
ing
ACS Peer-to-Peer
Egress Control
ACS Direct Translated
Peer-to-Peer
Table 9.13 ACS Violations for Ports Operating in Downstream Switch Port Mode
1.
Refer to PCI Express Base 2.0 specification.
Transaction Layer Error Pollution
Per section 6.2.3.2.3 of the PCI Express Base Specification Revision 2.0, transaction layer errors may
be prioritized to prevent error pollution in AER. Error pollution rules only apply to errors associated with the
reception of a TLP. Errors not associated with the reception of a TLP are logged for each occurrence of the
error.
The PES48H12G2 does not apply error pollution rules to internal errors detected by the device, even
when such errors are associated with the reception of a TLP. As a result, it is possible that more than one
AER error be logged on reception of a TLP which causes an internal error. For example, reception of a
poisoned TLP which causes an internal double-bit ECC error in a port's ingress buffer memory would result
in the poisoned and internal errors logged in the ingress port's AER capability structure.
PCI
Role Based
(Advisory)
Error
1
Reporting
Condition
Advisory when
If TLP is a non-posted request, a completion
the correspond-
with 'completer abort' status is generated. Note
ing error is con-
that this is not considered a completer abort
figured as non-
error in AER.
fatal in the
The Signaled Target Abort (STAS) bit is set in
AERUESV reg-
the SECSTS register.
ister and an
Non-advisory case: uncorrectable error pro-
ACS violation is
cessing.
detected on a
Advisory case: correctable error processing.
non-posted
TLP header logged in AER.
request
The offending TLP is dropped.
Advisory when
If TLP is a non-posted request, a completion
the correspond-
with 'completer abort' status is generated and
ing error is con-
Signaled Target Abort (STAS) bit is set in the
figured as non-
SECSTS register. Note that this is not consid-
fatal in the
ered a completer abort error in AER.
AERUESV reg-
Non-advisory case: uncorrectable error pro-
ister and an
cessing.
ACS violation is
Advisory cases: correctable error processing.
detected on a
TLP header logged in AER.
non-posted
The offending TLP is dropped.
request
Advisory when
If TLP is a non-posted request, a completion
the correspond-
with 'completer abort' status is generated and
ing error is con-
Signaled Target Abort (STAS) bit is set in the
figured as non-
SECSTS register. Note that this is not consid-
fatal in the
ered a completer abort error in AER.
AERUESV reg-
Non-advisory case: uncorrectable error pro-
ister and an
cessing.
ACS violation is
Advisory cases: correctable error processing.
detected on a
TLP header logged in AER.
non-posted
The offending TLP is dropped.
request
(Refer to the
Offending TLP is subject to ACS Peer-to-Peer
next column)
Egress Control and ACS Peer-to-Peer Request
Redirect rules.
9 - 13
Action Taken
April 5, 2013
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