2014-01-29 Bjorn Helgaas <bhelgaas@xxxxxxxxxx>: > [+cc linux-arm, Richard, Shawn (please keep the cc list)] > > On Wed, Jan 29, 2014 at 2:28 AM, Kamel BOUHARA <k.bouhara@xxxxxxxxx> wrote: >> ---------- Forwarded message ---------- >> From: Kamel BOUHARA <k.bouhara@xxxxxxxxx> >> Date: 2014-01-29 >> Subject: Re: PCIe trouble on imx6q >> To: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> >> >> >> 2014-01-28 Bjorn Helgaas <bhelgaas@xxxxxxxxxx>: >>> [+cc Richard, Shawn, linux-arm-kernel (all from MAINTAINERS)] >>> >>> On Tue, Jan 28, 2014 at 1:02 AM, Kamel BOUHARA <k.bouhara@xxxxxxxxx> wrote: >>>> Hello, >>>> >>>> Im getting trouble with kernel 3.13 at boot time, the pcie link failed >>>> to get up with the following log: >>>> ------------[ cut here ]------------ >>>> WARNING: CPU: 0 PID: 1 at drivers/gpio/gpiolib.c:159 gpio_to_desc+0x34/0x48() >>>> invalid GPIO -2 >>>> Modules linked in: >>>> CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.13.0+ #4 >>>> Backtrace: >>>> [<8001217c>] (dump_backtrace) from [<80012460>] (show_stack+0x18/0x1c) >>>> r6:802b9548 r5:00000000 r4:808d3060 r3:00000000 >>>> [<80012448>] (show_stack) from [<806414fc>] (dump_stack+0x84/0x9c) >>>> [<80641478>] (dump_stack) from [<800289f8>] (warn_slowpath_common+0x70/0x94) >>>> r5:00000009 r4:bf05bcb0 >>>> [<80028988>] (warn_slowpath_common) from [<80028a54>] >>>> (warn_slowpath_fmt+0x38/0x40) >>>> r8:01f00000 r7:00000000 r6:0011cc11 r5:808b68c0 r4:bf24fa30 >>>> [<80028a20>] (warn_slowpath_fmt) from [<802b9548>] (gpio_to_desc+0x34/0x48) >>>> r3:fffffffe r2:807d23fc >>>> [<802b9514>] (gpio_to_desc) from [<802d9de0>] (imx6_pcie_host_init+0x174/0x434) >>>> [<802d9c6c>] (imx6_pcie_host_init) from [<80886dbc>] >>>> (dw_pcie_host_init+0x348/0x41c) >>>> r6:00000000 r5:808d52cc r4:00000020 r3:802d9c6c >>>> [<80886a74>] (dw_pcie_host_init) from [<808871d4>] (imx6_pcie_probe+0x320/0x3dc) >>>> r10:00000000 r9:000000c4 r8:808d539c r7:bf7e3384 r6:bf24fa30 r5:bf135810 >>>> r4:bf24fa10 >>>> [<80886eb4>] (imx6_pcie_probe) from [<8034b670>] (platform_drv_probe+0x20/0x50) >>>> r8:808d539c r7:00000000 r6:00000000 r5:808d539c r4:bf135810 >>>> [<8034b650>] (platform_drv_probe) from [<80349c74>] >>>> (driver_probe_device+0x118/0x234) >>>> r5:bf135810 r4:80e526b8 >>>> [<80349b5c>] (driver_probe_device) from [<80349e78>] (__driver_attach+0x9c/0xa0) >>>> r8:80886e90 r7:00000000 r6:bf135844 r5:808d539c r4:bf135810 r3:00000000 >>>> [<80349ddc>] (__driver_attach) from [<8034806c>] (bus_for_each_dev+0x68/0x9c) >>>> r6:80349ddc r5:808d539c r4:00000000 r3:00000000 >>>> [<80348004>] (bus_for_each_dev) from [<8034972c>] (driver_attach+0x20/0x28) >>>> r6:808df6a8 r5:bf1f5e00 r4:808d539c >>>> [<8034970c>] (driver_attach) from [<803493b0>] (bus_add_driver+0x148/0x1f4) >>>> [<80349268>] (bus_add_driver) from [<8034a4c8>] (driver_register+0x80/0x100) >>>> r7:8090e640 r6:8090e640 r5:00000005 r4:808d539c >>>> [<8034a448>] (driver_register) from [<8034b63c>] >>>> (__platform_driver_register+0x50/0x64) >>>> r5:00000005 r4:808d5388 >>>> [<8034b5ec>] (__platform_driver_register) from [<8034b6e0>] >>>> (platform_driver_probe+0x28/0xac) >>>> [<8034b6b8>] (platform_driver_probe) from [<80886ea8>] >>>> (imx6_pcie_init+0x18/0x24) >>>> r5:00000005 r4:808aa104 >>>> [<80886e90>] (imx6_pcie_init) from [<80008978>] (do_one_initcall+0x100/0x164) >>>> [<80008878>] (do_one_initcall) from [<8085ecc0>] >>>> (kernel_init_freeable+0x10c/0x1d0) >>>> r10:8089e060 r9:000000c4 r8:8089e050 r7:8090e640 r6:8090e640 r5:00000005 >>>> r4:808aa104 >>>> [<8085ebb4>] (kernel_init_freeable) from [<8063b67c>] (kernel_init+0x10/0x120) >>>> r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8063b66c >>>> r4:00000000 >>>> [<8063b66c>] (kernel_init) from [<8000e9c8>] (ret_from_fork+0x14/0x2c) >>>> r4:00000000 r3:ffffffff >>>> ---[ end trace b5e746dfc2398cd6 ]--- >>>> ------------[ cut here ]------------ >>>> WARNING: CPU: 0 PID: 1 at drivers/gpio/gpiolib.c:159 gpio_to_desc+0x34/0x48() >>>> invalid GPIO -2 >>>> Modules linked in: >>>> CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 3.13.0+ #4 >>>> Backtrace: >>>> [<8001217c>] (dump_backtrace) from [<80012460>] (show_stack+0x18/0x1c) >>>> r6:802b9548 r5:00000000 r4:808d3060 r3:00000000 >>>> [<80012448>] (show_stack) from [<806414fc>] (dump_stack+0x84/0x9c) >>>> [<80641478>] (dump_stack) from [<800289f8>] (warn_slowpath_common+0x70/0x94) >>>> r5:00000009 r4:bf05bcb0 >>>> [<80028988>] (warn_slowpath_common) from [<80028a54>] >>>> (warn_slowpath_fmt+0x38/0x40) >>>> r8:01f00000 r7:00000000 r6:0011cc11 r5:808b68c0 r4:bf24fa30 >>>> [<80028a20>] (warn_slowpath_fmt) from [<802b9548>] (gpio_to_desc+0x34/0x48) >>>> r3:fffffffe r2:807d23fc >>>> [<802b9514>] (gpio_to_desc) from [<802d9df8>] (imx6_pcie_host_init+0x18c/0x434) >>>> [<802d9c6c>] (imx6_pcie_host_init) from [<80886dbc>] >>>> (dw_pcie_host_init+0x348/0x41c) >>>> r6:00000000 r5:808d52cc r4:00000020 r3:802d9c6c >>>> [<80886a74>] (dw_pcie_host_init) from [<808871d4>] (imx6_pcie_probe+0x320/0x3dc) >>>> r10:00000000 r9:000000c4 r8:808d539c r7:bf7e3384 r6:bf24fa30 r5:bf135810 >>>> r4:bf24fa10 >>>> [<80886eb4>] (imx6_pcie_probe) from [<8034b670>] (platform_drv_probe+0x20/0x50) >>>> r8:808d539c r7:00000000 r6:00000000 r5:808d539c r4:bf135810 >>>> [<8034b650>] (platform_drv_probe) from [<80349c74>] >>>> (driver_probe_device+0x118/0x234) >>>> r5:bf135810 r4:80e526b8 >>>> [<80349b5c>] (driver_probe_device) from [<80349e78>] (__driver_attach+0x9c/0xa0) >>>> r8:80886e90 r7:00000000 r6:bf135844 r5:808d539c r4:bf135810 r3:00000000 >>>> [<80349ddc>] (__driver_attach) from [<8034806c>] (bus_for_each_dev+0x68/0x9c) >>>> r6:80349ddc r5:808d539c r4:00000000 r3:00000000 >>>> [<80348004>] (bus_for_each_dev) from [<8034972c>] (driver_attach+0x20/0x28) >>>> r6:808df6a8 r5:bf1f5e00 r4:808d539c >>>> [<8034970c>] (driver_attach) from [<803493b0>] (bus_add_driver+0x148/0x1f4) >>>> [<80349268>] (bus_add_driver) from [<8034a4c8>] (driver_register+0x80/0x100) >>>> r7:8090e640 r6:8090e640 r5:00000005 r4:808d539c >>>> [<8034a448>] (driver_register) from [<8034b63c>] >>>> (__platform_driver_register+0x50/0x64) >>>> r5:00000005 r4:808d5388 >>>> [<8034b5ec>] (__platform_driver_register) from [<8034b6e0>] >>>> (platform_driver_probe+0x28/0xac) >>>> [<8034b6b8>] (platform_driver_probe) from [<80886ea8>] >>>> (imx6_pcie_init+0x18/0x24) >>>> r5:00000005 r4:808aa104 >>>> [<80886e90>] (imx6_pcie_init) from [<80008978>] (do_one_initcall+0x100/0x164) >>>> [<80008878>] (do_one_initcall) from [<8085ecc0>] >>>> (kernel_init_freeable+0x10c/0x1d0) >>>> r10:8089e060 r9:000000c4 r8:8089e050 r7:8090e640 r6:8090e640 r5:00000005 >>>> r4:808aa104 >>>> [<8085ebb4>] (kernel_init_freeable) from [<8063b67c>] (kernel_init+0x10/0x120) >>>> r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8063b66c >>>> r4:00000000 >>>> [<8063b66c>] (kernel_init) from [<8000e9c8>] (ret_from_fork+0x14/0x2c) >>>> r4:00000000 r3:ffffffff >>>> ---[ end trace b5e746dfc2398cd7 ]--- >>>> imx6q-pcie 1ffc000.pcie: phy link never came up >>>> PCI host bridge to bus 0000:00 >>>> pci_bus 0000:00: root bus resource [io 0x1000-0x10000] >>>> pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff] >>>> pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] >>> >>> Not related to the GPIO/link problem, but something's wrong here -- >>> the host bridge driver should be telling us what bus numbers are >>> behind the host bridge. Since it didn't, the PCI core had to guess. >>> >>>> PCI: bus0: Fast back to back transfers disabled >>>> PCI: bus1: Fast back to back transfers enabled >>>> pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff] >>>> pci 0000:00:00.0: BAR 6: assigned [mem 0x01100000-0x0110ffff pref] >>>> pci 0000:00:00.0: PCI bridge to [bus 01] >>>> pci 0000:00:00.0: PCI bridge to [bus 01] >>>> >>>> Please, any help is welcome. >>>> Regards, >>>> Kamel.B >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-pci" in >>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> So I suppose, this is not a hardware issue rather a bad configuration ? >> Maybe the following log from lspci will be helpful ? > > It looks like a configuration issue or an imx6q host bridge issue. In > either case, it looks like something *before* we get to PCIe, so > something like your DT description of the host bridge is more likely > to be useful. > >> root@phyFLEX-i:~ lspci -vvv >> 00:00.0 PCI bridge: Device 16c3:abcd (rev 01) (prog-if 00 [Normal decode]) >> 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, Cache Line Size: 64 bytes >> Region 0: Memory at 01000000 (32-bit, non-prefetchable) [size=1M] >> Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 >> I/O behind bridge: 0000f000-00000fff >> Memory behind bridge: fff00000-000fffff >> Prefetchable memory behind bridge: fff00000-000fffff >> Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- >> <TAbort- <MAbort- <SERR- <PERR- >> [virtual] Expansion ROM at 01100000 [disabled] [size=64K] >> BridgeCtl: Parity+ SERR- NoISA- VGA- MAbort- >Reset- FastB2B- >> PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- >> Capabilities: [40] Power Management version 3 >> Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA >> PME(D0+,D1+,D2-,D3hot+,D3cold+) >> Status: D0 PME-Enable- DSel=0 DScale=0 PME- >> Capabilities: [50] MSI: Mask+ 64bit+ Count=1/1 Enable+ >> Address: 0000000090000000 Data: 0000 >> Masking: 00000000 Pending: 00000000 >> Capabilities: [70] Express (v2) Root Port (Slot-), MSI 00 >> DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s >> <64ns, L1 <1us >> ExtTag- RBE+ FLReset- >> DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ >> Unsupported+ >> RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop- >> MaxPayload 128 bytes, MaxReadReq 512 bytes >> DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- >> AuxPwr+ TransPend- >> LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, >> Latency L0 <1us, L1 <8us >> ClockPM- Surprise- LLActRep+ BwNot- >> LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk- >> ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- >> LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- >> SlotClk+ DLActive- BWMgmt- ABWMgmt- >> RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- >> PMEIntEna+ CRSVisible- >> RootCap: CRSVisible- >> RootSta: PME ReqID 0000, PMEStatus- PMEPending- >> DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ ARIFwd- >> DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd- >> LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- >> SpeedDis-, Selectable De-emphasis: -6dB >> Transmit Margin: Normal Operating Range, >> EnterModifiedCompliance- ComplianceSOS- >> Compliance De-emphasis: -6dB >> LnkSta2: Current De-emphasis Level: -3.5dB >> Capabilities: [100] 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- NonFatalErr- >> CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ >> AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn- >> Capabilities: [140] Virtual Channel <?> >> Kernel driver in use: pcieport >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-pci" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html Ok, actually I didn't get the host bridge set properly for my board, here is my DT: /dts-v1/; #include "imx6q-phytec-pfla02.dtsi" / { model = "Phytec phyFLEX-i.MX6 Quad Carrier-Board"; compatible = "phytec,imx6q-pbab01", "phytec,imx6q-pfla02", "fsl,imx6q"; }; &fec { status = "okay"; }; &uart4 { status = "okay"; }; &usdhc2 { status = "okay"; }; &usdhc3 { status = "okay"; }; &pcie { status = "okay"; }; Can you give me a example of host configuration ? BR, Kamel.B -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
