Ethernet Link Inspector User Guide for Intel® Stratix® 10 Devices

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ID 683367
Date 7/01/2019
Public
Document Table of Contents
Document Table of Contents x
1. Overview of Ethernet Link Inspector for Intel® Stratix® 10 Devices 2. Setting Up the Ethernet Link Inspector 3. Functional Description 4. Ethernet Link Inspector User Guide Archives 5. Document Revision History for the Ethernet Link Inspector User Guide for Intel® Stratix® 10 Devices
1. Overview of Ethernet Link Inspector for Intel® Stratix® 10 Devices x
1.1. Features 1.2. Supported IP Cores and Devices
1.1. Features x
1.1.1. Link Monitor 1.1.2. Link Analysis
2. Setting Up the Ethernet Link Inspector x
2.1. System Requirements and Prerequisites 2.2. Running the Ethernet Link Inspector
2.1. System Requirements and Prerequisites x
2.1.1. System Requirements 2.1.2. Enabling Your Design For the Link Monitor
2.2. Running the Ethernet Link Inspector x
2.2.1. Running the Link Monitor 2.2.2. Running the Link Analysis
2.2.2. Running the Link Analysis x
2.2.2.1. Creating and Capturing Signal Tap File and Exporting Signal Tap Database as CSV File
3. Functional Description x
3.1. Link Monitor Module 3.2. Link Analysis Module
3.1. Link Monitor Module x
3.1.1. Link Monitor Tabs and Settings
3.2. Link Analysis Module x
3.2.1. Sequencer State Machine 3.2.2. Link Analysis Tabs and Settings
3.2.2. Link Analysis Tabs and Settings x
3.2.2.1. Sequencer State Machine Tab 3.2.2.2. Auto Neg Tab AN Communication Packet AN Arbiter State Machine 3.2.2.3. Link Training Tab 3.2.2.4. Data Mode Tab 3.2.2.5. Help Tab
1. Overview of Ethernet Link Inspector for Intel® Stratix® 10 Devices
2. Setting Up the Ethernet Link Inspector
3. Functional Description
4. Ethernet Link Inspector User Guide Archives
5. Document Revision History for the Ethernet Link Inspector User Guide for Intel® Stratix® 10 Devices

3.2.2.2. Auto Neg Tab

The Auto Neg tab may have one or more subtabs based on number of times the device goes into Auto Negotiation (AN) state during the Signal Tap capture in a finite amount of time. Each subtab displays the Ethernet IP link behavior during the occurrence of AN. Each AN occurrence is also prefixed with a number to distinguish between various AN occurrences.

Table 6.  Local Device Status Signals
Name Signal 6 Indication Description
Auto Negotiation (AN) Enable an_enable LED
  • Green: Auto Negotiation is enabled.
  • Red: Auto Negotiation is disabled.
Auto Negotiation (AN) Done an_done LED
  • Green: Auto Negotiation completed. This LED indication does not mean that the local device has finalized the common technology. Even in case of technology mismatch between the local and remote devices, an_done will be asserted.
  • Red: Auto Negotiation is not completed.
Local Auto Negotiation (AN) Technology [lcl_tech] or [E25_TECH] Text Displays the Auto Negotiation technology broadcasted by the local device.
Final Auto Negotiation (AN) Technology [hcd_40g, hcd_kr, hcd_xaui, hcd_gige] or [ieee_mode] or [e25_mode] Text
  • Displays the converged Auto Negotiation technology by the local device.
  • Shows the corresponding timestamp of technology convergence.
Table 7.  Remote Device Status Signals
Name Signal Indication Description
Remote Device Auto Negotiation Technology [lp_tech] or [lp_e25_mode] Text
  • Displays the Auto Negotiation technology broadcasted by the remote device.
  • Shows the timestamp when the local device receives this broadcasted technology.

AN Communication Packet

The AN Communication Packet section displays the exchange of AN packets between two devices. There are two parts to the AN Communication Packets section:
  • AN Packets Received—shows the sequence of AN packets (from left to right) received from a remote device.
  • AN Packets Sent—shows sequence of AN packets (from left to right) sent to a remote device.
Figure 8. AN Communication Packet GUI
Table 8.  AN Communication Packet GUI Parameters
Parameter Description
AN Packets (48 bits) Shows the Auto Negotiation packets exchanged between local and remote devices in hexadecimal format.
Time (msec) Shows the SSM state in which AN packets are sent/received along with the timestamp with respect to reference timer
Packet Details (hex) Shows the breakout for various bits in an AN packet and displays whether an AN packet in base page or next page.
Note: The assumption for BASE PAGE or NEXT PAGE only holds true when AN states are captured from the actual start point of Auto Negotiation (i.e., start point of SSM_RC_AN). If the AN states are captured partially in Signal Tap Logic Analyzer, this assumption becomes unreliable.

AN Arbiter State Machine

The AN Arbiter State Machine section displays the AN Arbiter State Machine in the form of time domain waveforms. The AN arbiter state machine represents the entire Ethernet IP link behavior in the AN mode of operation.

Each waveform window represents a timescale for one Sequencer State Machine (SSM) state (i.e., SSM_RC_AN, SSM_AN_ABL or SSM_AN_CHK). The time scale of waveform windows, such as START and STOP time, should match the timestamp of the corresponding SSM state. The waveform windows are also tagged with specific SSM states, as shown in the following figure:
Figure 9. Time Domain Waveforms of the Sequencer State Machine States

Each AN Arbiter SM state is represented as an individual waveform. A logic 1 value on a state waveform at a particular timestamp signifies the current state of the device at that timestamp. Device can possibly be in only one state at a given point of time. To change the magnification level of the waveforms, click the left mouse button and drag the mouse cursor to the bottom right of the waveform windows to zoom in and drag the mouse cursor the top right of the waveform windows to zoom out.

Note: While zooming in and out, the waveform windows may be offset in the vertical scale. This may cause several waveform windows in a row to be misaligned for logic 0 and 1. To remove any misalignments and scale the Y axis of all waveform window to a common scale, click on the Scale Waveforms (Y-axis) button.
Figure 10. Flowchart of AN Arbiter State MachineThis figure shows a flow chart of the AN Arbiter State Machine and the conditions that drives the next state, based on the current state.
Table 9.  AN Arbiter State Machine State and Signal Descriptions
Name Indication Description
AN_ARB_ENABLE Waveform This is the initial state of the AN Arbiter State Machine. This should be enabled (logic 1 value) during SSM_RC_AN state. This state ends after the start of SSM_AN_ABL and the local device moves to the next state i.e., AN_ARB_TX_DIS.
AN_ARB_TX_DIS Waveform In this state, the TX output of the local device is disabled for a finite amount of time to allow the remote device to start Auto Negotiation. This causes to link to go down. The duration of this state can be 60 to 75 ms. Device should always complete this state irrespective if there is a remote device available or not.
AN_ARB_ABL_DET Waveform

In this state, the local device send out the AN Base Page and waits for the AN base page from the remote device. The local device goes into this state at the end of SSM_AN_ABL. The local device waits in this state until the AN Base page is received and the corresponding Acknowledgement (ACK) is sent out to the remote device. The local device moves to next state after sending ACK to the remote device.

If the ACK is not received from the remote device at this time, the local device moves to AN_ARB_ACK_DET where it waits for ACK from the remote signal. Else, the local device moves to AN_ARB_COMP_ACK, which indicates the completion of ACK exchange between the two devices.
AN_ARB_ACK_DET Waveform In this state, the local device is waiting for ACK from the remote device.
AN_ARB_COMP_ACK Waveform When an acknowledgement is sent to as well as received from the remote device, the local device moves to this state called the Ack Complete state.
AN_ARB_AN_GOOD Waveform This state indicates that AN has successfully completed on local device and is the final state of AN Arbiter State Machine.
AN_ARB_NXT_PAGE Waveform This state shows that the local device is sending NEXT page and waits for NEXT page from the remote device. This state remains until the local device send ACK to the remote device.
Table 10.  AN Arbiter State Machine Signal Descriptions
Name Indication Description
an_enable Waveform Displays when AN is enable. This is waveform representation of the AN Enable signal described in Table 6.
an_done Waveform Displays when AN is completed successfully. This is waveform representation of the AN Done signal described in Table 6.
6 Actual signal names in the IP design file.
Level Two Title