Original version of the pcilmr 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.
Patch set improves grading from two sides:
* 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. Keep in mind that the Spec uses full eye width and height
terms and that reference values depend on the current Link speed;
* 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.
At the same time, fix the known limitations associated with arguments
parsing.
With the new changes made, the logic responsible for arguments parsing has
become too large, so put it in a separate file.
Nikita Proshkin (6):
pcilmr: Ensure that utility can accept either Downstream or Upstream
link port
pcilmr: Move most of pcilmr arguments parsing logic to the separate
file
pcilmr: Add new grading option
pcilmr: Add option to configure margining dwell time
pcilmr: Apply grading quirk for Ice Lake RC ports
pcilmr: Update usage and man: new arguments format and grading
Makefile | 2 +-
lmr/lmr.h | 103 +++++++++----
lmr/margin.c | 72 ++++-----
lmr/margin_args.c | 302 ++++++++++++++++++++++++++++++++++++
lmr/margin_hw.c | 57 ++++++-
lmr/margin_log.c | 23 ++-
lmr/margin_results.c | 322 +++++++++++++++++++++++++--------------
pcilmr.c | 353 ++++++-------------------------------------
pcilmr.man | 138 +++++++++++++----
9 files changed, 841 insertions(+), 531 deletions(-)
create mode 100644 lmr/margin_args.c
--
2.34.1
