diff options
| author | Bjorn Helgaas <[email protected]> | 2012-04-30 15:21:02 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <[email protected]> | 2012-04-30 15:21:02 -0600 |
| commit | 284f5f9dbac170b054c1e386ef92cbf654e91bba (patch) | |
| tree | 74cacc94070d5590378c368fa7378d37319d07be /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 66f75a5d028beaf67c931435fdc3e7823125730c (diff) | |
PCI: work around Stratus ftServer broken PCIe hierarchy
A PCIe downstream port is a P2P bridge. Its secondary interface is
a link that should lead only to device 0 (unless ARI is enabled)[1], so
we don't probe for non-zero device numbers.
Some Stratus ftServer systems have a PCIe downstream port (02:00.0) that
leads to both an upstream port (03:00.0) and a downstream port (03:01.0),
and 03:01.0 has important devices below it:
[0000:02]-+-00.0-[03-3c]--+-00.0-[04-09]--...
\-01.0-[0a-0d]--+-[USB]
+-[NIC]
+-...
Previously, we didn't enumerate device 03:01.0, so USB and the network
didn't work. This patch adds a DMI quirk to scan all device numbers,
not just 0, below a downstream port.
Based on a patch by Prarit Bhargava.
[1] PCIe spec r3.0, sec 7.3.1
CC: Myron Stowe <[email protected]>
CC: Don Dutile <[email protected]>
CC: James Paradis <[email protected]>
CC: Matthew Wilcox <[email protected]>
CC: Jesse Barnes <[email protected]>
CC: Prarit Bhargava <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions