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Link Layer Tests
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The test fails if the PUT does not transmit the Header Sequence Number
Advertisement and the Rx Header Buffer Credit Advertisement once in U0.
Examiner keeps the link active by sending LDNs for 20us.
The test fails if the PUT transmits the Port Capability LMP.
Specification Reference
Sections 7.2.4.1.1#6,8,17,22 ● 7.4.2#2,4,10 ● 7.5.4.6.1#1 ● 7.5.4.7.2#3 7.5.10.4.1#1 ●
7.5.12.3.1#1,2 ● 7.5.12.3.2#1 ● 7.5.12.4.1#1 ● 7.5.12.4.2#1
7.30
Recovery on Three Consecutive Failed RX Header
Packets Test
Test Summary
This test verifies that the PUT will enter Recovery if it fails to receive a header packet three
consecutive times.
Test Steps and Expected Results
1.
Examiner performs steps 1 to 3 of the Link Initialization Sequence.
2.
Examiner and the PUT will exchange Port Configuration transactions, but in this case the
first packet sent by Examiner will have an invalid CRC-5.
If Examiner is configured as an Upstream Port:
a.
LVS waits for the PUT’s Port Capability LMP.
b.
LVS transmits its Port Capability LMP with an invalid CRC-5.
c.
LVS verifies that the PUT replies with an LBAD.
d.
LVS transmits a LRTY and then retransmits the packet with invalid CRC-5.
e.
LVS verifies that the PUT replies with an LBAD.
f.
LVS transmits a LRTY and then retransmits the packet with invalid CRC-5.
g.
LVS verifies that the PUT initiates Recovery.
