| #
390902d6 |
| 22-May-2024 |
Nikita Proshkin <[email protected]> |
pcilmr: Add new grading option
Original version of the utility used values from the Table 8-11 of the
PCIe Base Spec Rev 5.0 to evaluate lanes. But it seems that these values
relate only to the marg
pcilmr: Add new grading option
Original version of the utility used values from the Table 8-11 of the
PCIe Base Spec Rev 5.0 to evaluate lanes. But it seems that these values
relate only to the margining equipment and are not relevant to evaluating
the quality of connections.
The PCIe Base Spec Rev 5.0 sets the minimum values for the eye in the
section 8.4.2. Change default grading values in the utility according to
this section.
The specification uses the values of the full width and height of the eye,
so add these values to the output of the utility.
In addition, manufacturers can provide criteria for their devices that
differ from the standard ones. Usually this information falls under the
NDA, so add an option to the utility that will allow the user to set
necessary criteria for evaluating the quality of lanes.
Implement the following syntax for the -g(rading) option:
-g 1t=15ps,f | -g 6v=20
Use passed per link receiver criteria for the eye width (timing - t) or
height (voltage - v) in the utility results.
Additional flag f is for situations when port doesn't support two side
independent margining. In such cases by default calculate EW or EH as a
double one side result. User can add f flag for -g option to tell the
utility that the result in one direction is actually the measurement of
the full eye (for example, Ice Lake RC ports work in this way) and it does
not need to be multiplied.
Signed-off-by: Nikita Proshkin <[email protected]>
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|
| #
26359ed3 |
| 22-May-2024 |
Nikita Proshkin <[email protected]> |
pcilmr: Move most of pcilmr arguments parsing logic to the separate file
Also change arguments parsing logic: now link parameters (selected lane
numbers, timing or voltage steps, etc) need to be spe
pcilmr: Move most of pcilmr arguments parsing logic to the separate file
Also change arguments parsing logic: now link parameters (selected lane
numbers, timing or voltage steps, etc) need to be specified after link port
and will affect only this link margining (previously, one option was
applied to all links).
See updated man for syntax and example.
Signed-off-by: Nikita Proshkin <[email protected]>
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