Hello everyone,
I have an issue related to the EDK SNP Network driver. I am trying to perform
an Ethernet Loopback test on an Intel platform, and for this I am using an EFI
Intel Network driver to perform the Loopback diagnosis (through the
EFI_DRIVER_DIAGNOSTICS_PROTOCOL). This Intel Network driver uses in turn the
SNP network protocol to send UNDI commands. The problem I am experiencing is
that I am getting a lot of UNDI debug messages, like "snp->undi.receive()
8000h:3h", when performing the Loopback diagnosis. The debug message means that
the UNDI command failed (PXE_STATFLAGS_COMMAND_FAILED) with status busy
(PXE_STATCODE_BUSY).
This issue happens only on an Ivy Bridge platform. Testing the same code on a
Sandy Bridge platform, does not reproduce the issue. I am trying to understand
why this happens on the IBR platform and how I can avoid it.
Thanks,
Sorin
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