---------- 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 ? 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
