https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202517
Bug ID: 202517
Summary: PCI PF memory decode disable when sizing VF BARs
Product: Base System
Version: 11.0-CURRENT
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 160143
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=160143&action=edit
Patch to prevent disabling of PF during VF bar sizing
During IOV config, when setting up VF bars, several calls are made to
'pci_read_bar' (in sys/dev/pci/pci.c) in order to size VF BARs, which causes
memory decoding to be turned off temporarily for the PF associated with those
VFs. This can interfere with an already running PF.
This was discussed a few months back on -current, but it doesn't look like the
fix has hit the source tree:
https://lists.freebsd.org/pipermail/freebsd-current/2015-May/055725.html
I've been using the attached patch (from the above thread) for some time to
solve this problem.
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