Re: [RFC 3/9] PCI/portdrv: create platform devices for child OF nodes

From: Bartosz Golaszewski
Date: Thu Jan 11 2024 - 06:09:44 EST

On Thu, 11 Jan 2024 11:42:11 +0100, Lukas Wunner <lukas@xxxxxxxxx> said:
> On Wed, Jan 10, 2024 at 02:18:30PM -0600, Bartosz Golaszewski wrote:
>> On Wed, 10 Jan 2024 17:41:05 +0100, Lukas Wunner <lukas@xxxxxxxxx> said:
>> > On Wed, Jan 10, 2024 at 05:26:52PM +0100, Bartosz Golaszewski wrote:
>> > > Seems like the following must be true but isn't in my case (from
>> > > pci_bus_add_device()):
>> > >
>> > > if (pci_is_bridge(dev))
>> > > of_pci_make_dev_node(dev);
>> > >
>> > > Shouldn't it evaluate to true for ports?
>> >
>> > It should.
>> >
>> > What does "lspci -vvvvxxxx -s BB:DD.F" say for the port in question?
>>
>> I cut out the hexdump part, let me know if you really need it.
>
> I really need it.
>

Ok, one more:

# lspci -vvvvxxxx -s 0000:00:00
0000:00:00.0 PCI bridge: Qualcomm Technologies, Inc Device 010b
(prog-if 00 [Normal decode])
Device tree node: /sys/firmware/devicetree/base/soc@0/pcie@1c00000/pcie@0
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 188
IOMMU group: 7
Region 0: Memory at 60300000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
I/O behind bridge: f000-0fff [disabled] [16-bit]
Memory behind bridge: 60400000-604fffff [size=1M] [32-bit]
Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
[disabled] [64-bit]
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [50] MSI: Enable+ Count=1/32 Maskable+ 64bit+
Address: 00000000a1c00000 Data: 0000
Masking: fffffffe Pending: 00000000
Capabilities: [70] Express (v2) Root Port (Slot+), MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0
ExtTag- RBE+
DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ TransPend-
LnkCap: Port #0, Speed 8GT/s, Width x1, ASPM L0s L1, Exit Latency
L0s <1us, L1 <64us
ClockPM- Surprise+ LLActRep+ BwNot+ ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 128 bytes, Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 5GT/s, Width x1
TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt+
SltCap: AttnBtn+ PwrCtrl+ MRL+ AttnInd+ PwrInd+ HotPlug- Surprise+
Slot #0, PowerLimit 0W; Interlock+ NoCompl-
SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
Control: AttnInd Off, PwrInd Off, Power- Interlock-
SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock-
Changed: MRL- PresDet- LinkState-
RootCap: CRSVisible+
RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna+ CRSVisible+
RootSta: PME ReqID 0000, PMEStatus- PMEPending-
DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP+ LTR+
10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- EETLPPrefix-
EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
FRS- LN System CLS Not Supported, TPHComp+ ExtTPHComp- ARIFwd-
AtomicOpsCap: Routing- 32bit- 64bit- 128bitCAS-
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR+
10BitTagReq- OBFF Disabled, ARIFwd-
AtomicOpsCtl: ReqEn- EgressBlck-
LnkCap2: Supported Link Speeds: 2.5-8GT/s, Crosslink- Retimer- 2Retimers- DRS-
LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance-
ComplianceSOS-
Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB preshoot
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-
EqualizationPhase1-
EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-
Retimer- 2Retimers- CrosslinkRes: unsupported
Capabilities: [100 v2] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF-
MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF-
MalfTLP- ECRC- UnsupReq- ACSViol-
UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+
MalfTLP+ ECRC- UnsupReq- ACSViol-
CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr-
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- ECRCChkCap+ ECRCChkEn-
MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
HeaderLog: 00000000 00000000 00000000 00000000
RootCmd: CERptEn+ NFERptEn+ FERptEn+
RootSta: CERcvd- MultCERcvd- UERcvd- MultUERcvd-
FirstFatal- NonFatalMsg- FatalMsg- IntMsg 0
ErrorSrc: ERR_COR: 0000 ERR_FATAL/NONFATAL: 0000
Capabilities: [148 v1] Secondary PCI Express
LnkCtl3: LnkEquIntrruptEn- PerformEqu-
LaneErrStat: 0
Capabilities: [168 v1] Transaction Processing Hints
No steering table available
Capabilities: [1fc v1] L1 PM Substates
L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
PortCommonModeRestoreTime=70us PortTPowerOnTime=0us
L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
T_CommonMode=70us LTR1.2_Threshold=76800ns
L1SubCtl2: T_PwrOn=0us
Kernel driver in use: pcieport
00: cb 17 0b 01 07 05 10 00 00 00 04 06 00 00 01 00
10: 00 00 30 60 00 00 00 00 00 01 ff 00 f0 00 00 00
20: f0 ff 00 00 f1 ff 01 00 00 00 00 00 00 00 00 00
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960: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
970: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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9a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
9b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
9c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
9d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
9e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
9f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
a90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
aa0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ab0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ac0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ad0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ae0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
af0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
b00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
b10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
b20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
b30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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b60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
b70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
b80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
b90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ba0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
bb0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
bc0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
bd0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
be0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
bf0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
c90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ca0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
cb0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
cc0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
cd0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ce0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
cf0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
d90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
da0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
db0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
dc0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
dd0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
de0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
df0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
e90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ea0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
eb0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ec0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ed0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ee0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ef0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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Bartosz