Altera Arria V Avalon-MM - Manual (Page 111)

Transaction Layer Errors
Table 8-4: Errors Detected by the Transaction Layer
Error Type Description
Poisoned TLP received Uncorrectable
(non-fatal)
This error occurs if a received Transaction Layer packet
has the EP poison bit set.
The received TLP is passed to the Application Layer and
the Application Layer logic must take appropriate action
in response to the poisoned TLP. Refer to “2.7.2.2 Rules
for Use of Data Poisoning” in the PCI Express Base
Specification for more information about poisoned
TLPs.
ECRC check failed (1) Uncorrectable
(non-fatal)
This error is caused by an ECRC check failing despite
the fact that the TLP is not malformed and the LCRC
check is valid.
The Hard IP block handles this TLP automatically. If the
TLP is a non-posted request, the Hard IP block
generates a completion with completer abort status. In
all cases the TLP is deleted in the Hard IP block and not
presented to the Application Layer.
Unsupported Request for
Endpoints
Uncorrectable
(non-fatal)
This error occurs whenever a component receives any of
the following Unsupported Requests:
• Type 0 Configuration Requests for a non-existing
function.
• Completion transaction for which the Requester ID
does not match the bus, device and function number.
• Unsupported message.
• A Type 1 Configuration Request TLP for the TLP
from the PCIe link.
• A locked memory read (MEMRDLK) on native
Endpoint.
• A locked completion transaction.
• A 64-bit memory transaction in which the 32 MSBs
of an address are set to 0.
• A memory or I/O transaction for which there is no
BAR match.
• A memory transaction when the Memory Space
Enable bit (bit [1] of the PCI Command register at
Configuration Space offset 0x4) is set to 0.
• A poisoned configuration write request (
CfgWr0
)
UG-01105_avmm
2014.12.15
Transaction Layer Errors 8-3
Error Handling Altera Corporation
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