Teledyne LeCroy Protocol PCI Express Script Automation Test Tool - Manual (Page 46)

Teledyne LeCroy PCI Express Script Automation Test Tool User Manual
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3.2.1.8 Test 52-160. UndefinedDLLPEncoding
ASSERTIONS COVERED: DLL.5.2#16
The intent of this test is to verify that the DUT silently drops any DLLP with undefined encoding (any pattern for
DLLP type that is currently reserved) and no error is associated with it.
Trainer Stimulus: link_52-160_UndefinedDLLPEncoding.peg
Recording Options: link_layer.rec
Verification Scripts: link_52-160_UndefinedDLLPEncoding.pevs
Test Algorithm:
1. Issue command to the Driver to clear all error status bits for the Root or Switch port to which the Device
Emulator is attached.
2. Main test stage. Do the following:
a. Issue command to the Driver to perform 1-DWORD Memory Write to the Device Emulator.
b. Switch to the 'Disable' ACK/NAK policy.
c. Wait for the Memory Write TLP.
d. Send a DLLP with undefined encoding.
e. Switch back to the 'Automatic' ACK/NAK policy.
f.
Acknowledge the retransmitted TLP.
3. Issue command to the Driver to reflect the current values of the Error Reporting Registers for the port to
which the Device Emulator is attached (using Configuration Writes).
Pass/Fail Criteria:
Test should successfully progress though all test stages.
All test stages should be executed without protocol violations.
Verify that:
a) The DUT silently drops the DLLP with undefined encoding and retransmits the Memory Write TLP for which it
received an undefined DLLP.
b) The DUT set the ERR_CORR bit in its Device Status register.
c) The DUT did not set any error bits in the Advanced Uncorrectable Error Status register (if implemented).
d) The DUT set the “Replay Timer Timeout Status” bit in the Advanced Error Reporting Correctable Error Status
register (if implemented).
e) The DUT set the “Correctable Error Received” bit in the Root Error Status register (if implemented and
applicable).
If the DUT meets all these criteria, the DUT passes the test.