Test 52-160. undefineddllpencoding – Teledyne LeCroy Protocol PCI Express Script Automation Test Tool User Manual
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Teledyne LeCroy
PCI Express Script Automation Test Tool User Manual
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3.1.1.8 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 reserved right now) and no error is associated with it.
Trainer Stimulus: link_52-160_UndefinedDLLPEncoding.peg
Recording Options: link_layer_common.rec
Verification Scripts: link_52-160_UndefinedDLLPEncoding.pevs
Test Algorithm:
1. Write 0x0000000F to Device Control Register, to enable Error Reporting for all error types.
2. Write 0xFFFFFFFF to Advanced Uncorrectable Error Status Register, to clear all prior error bits.
3. Write 0xFFFFFFFF to Advanced Correctable Error Status Register, to clear all prior error bits.
4. Main test stage. Do the following:
a. Disable the automatic Ack/Nak.
b. Send configuration read request TLP.
c. Wait for completion.
d. Send a DLLP with undefined encoding.
e. Wait for the retransmitted completion.
f.
Switch back to Automatic Ack policy.
5. Read Device Status Register. Only ERR_CORR bit should be set.
6. Read Advanced Uncorrectable Error Status Register. No error bits should be set.
7. Read Advanced Correctable Error Status Register. Only Replay Timer Timeout Status bit should be set.
8. Write 0 to Device Control Register, to disable Error Reporting for all error types.
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 CONFIG_RD_COMPLETION
TLP for which it received an undefined DLLP.
b) The DUT set ERR_CORR bit in its Device Status register and generated ERR_CORR message.
c) The DUT set “Replay Timer Timeout Status” bit in the Advanced Error Reporting Correctable Error Status
register (if implemented).
If the DUT meets all these criteria, the DUT passes the test.