https://bugzilla.kernel.org/show_bug.cgi?id=198623
Bug ID: 198623
Summary: Ethernet controller not working on Toshiba NB10-A-104
- MMCONFIG memory used by PCI bus
Product: ACPI
Version: 2.5
Kernel Version: 4.14
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Other
Assignee: [email protected]
Reporter: [email protected]
Regression: No
On Toshiba Satellite NB10-A-104 laptop, the Realtek ethernet controller is not
working at all.
After booting Linux, the PCI BAR 2 and 4 of the ethernet controller are set to
addresses which are inside the MMCONFIG area (which I assume is illegal).
The MMCONFIG node does not even appear in /proc/iomem. The beginning of its
memory range is instead used by PCI bus 3.
On Windows, the ethernet controller works fine, and has a different memory
range assigned. (all other PCI devices have mostly the same addresses in
Windows and Linux)
The MMCONFIG area has an address range 0xe0000000-0xefffffff.
Comparison:
Linux:
Region 0: I/O ports at e000 [size=256]
Region 2: Memory at e0004000 (64-bit, prefetchable) [size=4K]
Region 4: Memory at e0000000 (64-bit, prefetchable) [size=16K]
Windows:
Region 0: I/O ports at e000 [size=256]
Region 2: Memory at cfffb000 (64-bit, prefetchable) [size=4K]
Region 4: Memory at cfffc000 (64-bit, prefetchable) [size=16K]
(IO ports are the same in Linux and Windows, and the controller works on Linux
if I patch the r8169 driver to use port-mapped IO)
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