[adding linux-pci]
On Wed, Nov 18, 2015 at 2:59 AM, Ville Syrjälä
<ville.syrjala@xxxxxxxxxxxxxxx> wrote:
> On Tue, Nov 17, 2015 at 11:43:25AM -0800, Andy Lutomirski wrote:
>> Typing:
>>
>> # cat /sys/devices/pci0000:00/0000:00:02.0/rom
>>
>> Provokes:
>>
>> i915 0000:00:02.0: Invalid ROM contents
>
> Hmm. So there's no PCI option ROM there. I wonder what is there. I
> get the same on my Braswell BTW. I tried to look through the UEFI
> spec a bit, and it seems to say that even for non-legacy option ROMs
> the 0x55aa signature should be there.
>
> But this being the GPU means we may be using the shadow ROM stuff,
> which IIRC assumes that the shadow is at 0xc000. I'm not sure that
> holds anymore with UEFI, and maybe we should be using some UEFI
> trick instead to find out where it actually lives?
>
> BTW what does 'lspci -vv -s 00:02.0' say on your machine?
>
00:02.0 VGA compatible controller: Intel Corporation Sky Lake
Integrated Graphics (rev 07) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: Dell Device 0704
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 128
Region 0: Memory at db000000 (64-bit, non-prefetchable) [size=16M]
Region 2: Memory at 90000000 (64-bit, prefetchable) [size=256M]
Region 4: I/O ports at f000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: [40] Vendor Specific Information: Len=0c <?>
Capabilities: [70] Express (v2) Root Complex Integrated Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0
ExtTag- RBE+
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
MaxPayload 128 bytes, MaxReadReq 128 bytes
DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR-,
OBFF Not Supported
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-,
OBFF Disabled
Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
Address: fee00018 Data: 0000
Capabilities: [d0] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [100 v1] #1b
Capabilities: [200 v1] Address Translation Service (ATS)
ATSCap: Invalidate Queue Depth: 00
ATSCtl: Enable-, Smallest Translation Unit: 00
Capabilities: [300 v1] #13
Kernel driver in use: i915
Kernel modules: i915
--Andy
>>
>> This is on a Dell XPS 13 9350 (Skylake). This is 4.3.0 plus some
>> wireless-next bits.
>>
>> --Andy
>>
>> --
>> Andy Lutomirski
>> AMA Capital Management, LLC
>> _______________________________________________
>> Intel-gfx mailing list
>> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Ville Syrjälä
> Intel OTC
--
Andy Lutomirski
AMA Capital Management, LLC
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