OpenSolaris 11.2 - understanding some of prtconf output

Question

While browsing through 'prtconf' output, I found the following properties for the PCIe device I'm implementing driver for:

% prtconf -v | less
...
name='pci-msix-capid-pointer' type=int items=1
           value=000000b0
name='pci-msi-capid-pointer' type=int items=1
           value=00000050
...

I guess these indicate MSI/MSI-X specific capabilities supported by the PCIe device, am I right? But what does value mean here?

FYI, you can start looking through the source code here: http://src.illumos.org/source/xref/illumos-gate/usr/src/uts/i86pc/io/pci/pci_common.c#274 — Andrew Henle, Oct 30 '15 at 14:20
@Andrew, thanks for link. Unfortunately, I'm still not at that level of knowledge of Solaris to easily browse such a complex code. Could you roughly point at the place where 'value' of pci-msi-capid-pointer is retreived, i.e. what is printed by prtconf in 'value' field. Thanks! — Mark, Nov 01 '15 at 23:03

score 2 · Answer 1 · answered Nov 28 '15 at 06:52

2

You'd do well to look at pci_common_intr_ops() in the file that @andrew-henle pointed you to. The values refer to the offset into the PCI or PCI-E configuration space. If your device doesn't support MSI-X interrupts, then you won't see that property.

answered Nov 28 '15 at 06:52

James McPherson

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OpenSolaris 11.2 - understanding some of prtconf output

1 Answers1