Teledyne LeCroy Protocol PCI Express Script Automation Test Tool - Manual (Page 23)

Teledyne LeCroy PCI Express Script Automation Test Tool User Manual
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3.1.1.3 Test 52-11. REPLAY_TIMER Test
ASSERTIONS COVERED: DLL.5.2#1.1
The intent of this test is to ensure that a DUT REPLAY_TIMER is working properly by not sending an ACK or
NAK.
Trainer Stimulus: link_52-11_REPLAY_TIMER.peg
Recording Options: link_layer_common.rec
Verification Scripts: link_52-11_REPLAY_TIMER.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. Wait for the replayed completion.
e. Ack the replayed completion.
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 retransmits the CONFIG_RD_COMPLETION TLP for which it received no ACK or NAK.
b) The DUT set only the 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.