Altera SerialLite II Protocol Manuel d'utilisateur Page 70
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70 Altera Corporation
SerialLite II Protocol Reference Manual
Error Events & Handling
error results in the packet being marked as bad, before being forwarded
to the user, or in a request for retransmission from the remote port
(retry-on-error). Table 2–25 summarizes all errors and their handling.
Most errors originate from two sources: protocol violation at the Link
layer, or bit errors at the Physical layer. Physical layer bit errors most
likely involve 8b/10b coding violations and may affect one or multiple
lanes. Bit errors at the Physical layer result in Link layer protocol errors or
CRC errors. Severe physical lane errors or bursts of errors result in
multiple coding violations, loss of 8b/10b code alignment, or loss of lane
alignment.
Table 2–25. Error Summary
Error Type Cause Action
Catastrophic ● Link state machine cannot
reverse polarity
● Link state machine cannot
reorder lanes
● Lanes in non-sequential order
SerialLite II enters
non-recoverable state;
requires manual reset
Link
● Eight consecutive {|TS1|}
sequences received in all
lanes simultaneously
● Loss of character alignment
● Loss of lane alignment
● Loss of characters from
underflow/overflow
● Data error threshold exceeded
● Retry-on-error timer expired
three times
Trigger link initialization
Data
● Invalid 8b/10b codes groups
● Running disparity errors
● Unsupported valid code
groups
● Link protocol violation
● LMP with BIP error
● CRC error
● Unexpected channel number
● Out of order packet
● Out of order acknowledgment
(if retry-on-error enabled)
Two possibilities:
● If retry-on-error is
enabled and the packet
is a priority packet,
request retransmission
● Otherwise, mark the
packet as bad and
forward it to the user link
layer
Packets
Marked Bad
{EBP} marked packet Received packet is marked
as bad and forwarded to
the user link layer
- SerialLite II Protocol 1
- Reference Manual 1
- MNL-SLITE2-1.0 2
- Table of Contents 3
- About This Manual 5
- Glossary 6
- Altera Corporation vii 7
- SerialLite II 9
- Specification 9
- Architectural 10
- Overview 10
- Physical Layer 11
- Description 12
- Signal Definitions 13
- Interface Diagrams 13
- Electrical Specifications 14
- Driver Characteristics 15
- Receiver Characteristics 15
- Symbol Encoding 16
- Notation Convention 17
- Transmission Order 18
- Altera Corporation 19 19
- SerialLite II Specification 19
- Running Disparity Rules 20
- Valid and Invalid code-groups 20
- Control Symbols 21
- Comma /COM/ 21
- Align /ALN/ 21
- Idle /IDL/ 21
- Control Sequences 22
- Ordered Sequences 25
- 28 Altera Corporation 28
- Physical Layer Description 28
- Training Sequence 29
- 30 Altera Corporation 30
- Altera Corporation 31 31
- 32 Altera Corporation 32
- Altera Corporation 33 33
- 34
- Scrambling (Optional) 35
- Data Link Layer 36
- Altera Corporation 37 37
- Link Management Packets 38
- Type BIP-8 40
- BIP-8 Coverage 40
- Parameter 40
- User Data 41
- Interruption (or under-run) 42
- SLP Link Management 43
- SPP Prioirity Payload EGP 43
- SDP Data Payload EGP 43
- Multi-Lane Alignment 44
- Data Transmission Rules 45
- Lane Alignment Examples 45
- 46 Altera Corporation 46
- Data Link Layer Description 46
- Altera Corporation 47 47
- 48 Altera Corporation 48
- Altera Corporation 49 49
- 50 Altera Corporation 50
- Altera Corporation 51 51
- Transfer Size 52
- Altera Corporation 53 53
- 54 Altera Corporation 54
- Altera Corporation 55 55
- Channel Multiplexing 56
- Data Packets 57
- Priority Packets 57
- 58 Altera Corporation 58
- Altera Corporation 59 59
- 60 Altera Corporation 60
- Flow Control (Optional) 61
- Flow control time 62
- Altera Corporation 63 63
- Retry-on-Error (Optional) 64
- Segment Identification (SID) 65
- Segment Buffers 65
- Segment Acknowledgement Timer 66
- Altera Corporation 67 67
- Error Events & 69
- Handling 69
- Catastrophic Error Events 71
- Link Error Events 71
- Data Error Events 72
- Data Error Threshold 73
- Packets Marked Bad 74
- 8b/10b Code 75
- References 83
- -GX White 84
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