i686 quirk for AMD Geode
in [Kernel]
|
Prev: [PATCH 1/1] PM: Thaws refrigerated and to be exited kernel threads
Next: drm/ksm -> s2disk -> resume -> [drm:r100_ring_test] *ERROR* radeon: ring test failed (sracth(0x15E4)=0xCAFEDEAD)
From: Alan Cox on 13 Nov 2009 12:00 O> Calling memcpy_toio on the Geode SC1200 on anything larger than 1 byte > causes the data to be delivered (at least on the PCI bus) reordered in > that very consistent manner. Sounds like you or your firmware have the caching and write combining misconfigured. > > The alignment doesn't affect it (I tested that). Simply doing more than > 1 byte at a time with memcpy_toio to the pci device messes up. Which usually means some form of write gathering is enabled or something thinks the device is write combining on the PCI bus. What does the PCI bus and the RCRR MTRR set look like ? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Lennart Sorensen on 13 Nov 2009 14:30 On Fri, Nov 13, 2009 at 04:57:30PM +0000, Alan Cox wrote: > O> Calling memcpy_toio on the Geode SC1200 on anything larger than 1 byte > > causes the data to be delivered (at least on the PCI bus) reordered in > > that very consistent manner. > > Sounds like you or your firmware have the caching and write combining > misconfigured. Well I can't wouch for the firmware, and unfortunately without knowing what address the firmware placed the configuration registers at there is no way for me to check the settings. > > The alignment doesn't affect it (I tested that). Simply doing more than > > 1 byte at a time with memcpy_toio to the pci device messes up. > > Which usually means some form of write gathering is enabled or something > thinks the device is write combining on the PCI bus. What does the PCI > bus and the RCRR MTRR set look like ? Well there is no /proc/mtrr. Here is lspci -vvx output. It is device 01:08. 00:00.0 Host bridge: Cyrix Corporation PCI Master Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR- Latency: 0 00: 78 10 01 00 07 00 80 22 00 00 00 06 00 00 00 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:0e.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) Subsystem: Realtek Semiconductor Co., Ltd. RT8139 Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin A routed to IRQ 10 Region 0: I/O ports at f800 [size=256] Region 1: Memory at e0000000 (32-bit, non-prefetchable) [size=256] Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1+,D2+,D3hot+,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 00: ec 10 39 81 03 00 90 02 10 00 00 02 00 40 00 00 10: 01 f8 00 00 00 00 00 e0 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 ec 10 39 81 30: 00 00 00 00 50 00 00 00 00 00 00 00 0a 01 20 40 00:11.0 PCI bridge: Hint Corp Unknown device 0031 (rev 01) (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64, Cache Line Size: 32 bytes Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 I/O behind bridge: 0000d000-0000dfff Memory behind bridge: e0100000-e01fffff Prefetchable memory behind bridge: 00000000c0000000-00000000c03fffff Secondary status: 66MHz+ FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B- Capabilities: [80] Power Management version 2 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [a0] Vital Product Data 00: 88 33 31 00 07 00 b0 02 01 00 04 06 08 40 01 00 10: 00 00 00 00 00 00 00 00 00 01 01 00 d1 d1 a0 02 20: 10 e0 10 e0 01 c0 31 c0 00 00 00 00 00 00 00 00 30: 00 00 00 00 80 00 00 00 00 00 00 00 ff 00 00 00 00:12.0 ISA bridge: National Semiconductor Corporation SCx200 Bridge Subsystem: National Semiconductor Corporation SCx200 Bridge Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, Cache Line Size: 32 bytes Region 0: I/O ports at 6400 [size=64] Region 1: I/O ports at 6600 [size=64] 00: 0b 10 00 05 0f 00 80 02 00 00 01 06 08 00 80 00 10: 01 64 00 00 01 66 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 0b 10 00 05 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:12.1 Bridge: National Semiconductor Corporation SCx200 SMI Subsystem: National Semiconductor Corporation SCx200 SMI Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Region 0: I/O ports at 6000 [size=256] 00: 0b 10 01 05 01 00 80 02 00 00 80 06 00 00 00 00 10: 01 60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 0b 10 01 05 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:12.2 IDE interface: National Semiconductor Corporation SCx200 IDE (rev 01) (prog-if 80 [Master]) Subsystem: National Semiconductor Corporation SCx200 IDE Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [disabled] [size=8] Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable) [disabled] [size=1] Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [disabled] [size=8] Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable) [disabled] [size=1] Region 4: I/O ports at fc00 [size=16] 00: 0b 10 02 05 05 00 80 02 01 80 01 01 00 00 00 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 01 fc 00 00 00 00 00 00 00 00 00 00 0b 10 02 05 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:12.3 Multimedia audio controller: National Semiconductor Corporation SCx200 Audio Subsystem: National Semiconductor Corporation SCx200 Audio Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Region 0: Memory at 40011000 (32-bit, non-prefetchable) [size=4K] 00: 0b 10 03 05 06 00 80 02 00 00 01 04 00 00 00 00 10: 00 10 01 40 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 0b 10 03 05 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:12.4 VGA compatible controller: National Semiconductor Corporation SCx200 Video (rev 01) (prog-if 00 [VGA]) Subsystem: National Semiconductor Corporation SCx200 Video Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin C routed to IRQ 0 Region 0: Memory at 40800000 (32-bit, non-prefetchable) [size=4K] Region 1: Memory at 40010000 (32-bit, non-prefetchable) [size=4K] Region 2: Memory at e0004000 (32-bit, non-prefetchable) [size=4K] 00: 0b 10 04 05 02 00 80 02 01 00 00 03 00 00 00 00 10: 00 00 80 40 00 00 01 40 00 40 00 e0 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 0b 10 04 05 30: 00 00 00 00 00 00 00 00 00 00 00 00 fe 03 00 00 00:12.5 Bridge: National Semiconductor Corporation SCx200 XBus Subsystem: National Semiconductor Corporation SCx200 XBus Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Region 0: I/O ports at 6200 [size=64] 00: 0b 10 05 05 03 00 80 02 00 00 80 06 00 00 00 00 10: 01 62 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 0b 10 05 05 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00:13.0 USB Controller: Compaq Computer Corporation ZFMicro Chipset USB (rev 08) (prog-if 10 [OHCI]) Subsystem: Compaq Computer Corporation ZFMicro Chipset USB Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 (20000ns max), Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 11 Region 0: Memory at e0005000 (32-bit, non-prefetchable) [size=4K] 00: 11 0e f8 a0 07 00 80 02 08 10 03 0c 08 00 00 00 10: 00 50 00 e0 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 11 0e f8 a0 30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 01 00 50 01:04.0 Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] (rev 36) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64 (6000ns min, 6000ns max) Interrupt: pin A routed to IRQ 11 Region 0: I/O ports at dc00 [size=32] Region 1: Memory at e0100000 (32-bit, non-prefetchable) [size=32] Expansion ROM at c0000000 [disabled] [size=1M] Capabilities: [40] Power Management version 1 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 00: 22 10 00 20 07 00 90 02 36 00 00 02 00 40 00 00 10: 01 dc 00 00 00 00 10 e0 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 ff 40 00 00 00 00 00 00 00 0b 01 18 18 01:05.0 Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] (rev 36) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64 (6000ns min, 6000ns max) Interrupt: pin A routed to IRQ 10 Region 0: I/O ports at d800 [size=32] Region 1: Memory at e0100020 (32-bit, non-prefetchable) [size=32] Expansion ROM at c0100000 [disabled] [size=1M] Capabilities: [40] Power Management version 1 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 00: 22 10 00 20 07 00 90 02 36 00 00 02 00 40 00 00 10: 01 d8 00 00 20 00 10 e0 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 ff 40 00 00 00 00 00 00 00 0a 01 18 18 01:06.0 Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] (rev 36) Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin A routed to IRQ 11 Region 0: I/O ports at d400 [size=32] Region 1: Memory at e0100040 (32-bit, non-prefetchable) [size=32] Expansion ROM at c0200000 [disabled] [size=1M] Capabilities: [40] Power Management version 1 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 00: 22 10 00 20 03 00 90 02 36 00 00 02 00 40 00 00 10: 01 d4 00 00 40 00 10 e0 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 ff 40 00 00 00 00 00 00 00 0b 01 18 18 01:07.0 Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] (rev 36) Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin A routed to IRQ 10 Region 0: I/O ports at d000 [size=32] Region 1: Memory at e0100060 (32-bit, non-prefetchable) [size=32] Expansion ROM at c0300000 [disabled] [size=1M] Capabilities: [40] Power Management version 1 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 00: 22 10 00 20 03 00 90 02 36 00 00 02 00 40 00 00 10: 01 d0 00 00 60 00 10 e0 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 ff 40 00 00 00 00 00 00 00 0a 01 18 18 01:08.0 Serial controller: Unknown device 5243:0001 (rev 04) (prog-if 02 [16550]) Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin A routed to IRQ 11 Region 0: Memory at e0100800 (32-bit, non-prefetchable) [size=2K] 00: 43 52 01 00 02 00 80 00 04 02 00 07 00 00 00 00 10: 00 08 10 e0 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff 30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 01 00 00 01:09.0 Network controller: Sangoma Technologies Corp. A104u Quad T1/E1 AFT Subsystem: Unknown device a013:1400 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64 (1250ns min, 3750ns max) Interrupt: pin A routed to IRQ 10 Region 0: Memory at e0110000 (32-bit, non-prefetchable) [size=64K] 00: 23 19 00 04 06 00 00 02 00 00 80 02 00 40 00 00 10: 00 00 11 e0 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 13 a0 00 14 30: 00 00 00 00 00 00 00 00 00 00 00 00 0a 01 05 0f Anything else I can grab that might give a clue? -- Len Sorensen -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Alan Cox on 13 Nov 2009 16:30 > > Which usually means some form of write gathering is enabled or something > > thinks the device is write combining on the PCI bus. What does the PCI > > bus and the RCRR MTRR set look like ? > > Well there is no /proc/mtrr. Linux doesn't have an RCRR driver - so you need to dump the MSRs directly (see the Geode GX manual MSR list) and read out the msrs. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Lennart Sorensen on 16 Nov 2009 13:00 On Fri, Nov 13, 2009 at 09:21:48PM +0000, Alan Cox wrote: > > > Which usually means some form of write gathering is enabled or something > > > thinks the device is write combining on the PCI bus. What does the PCI > > > bus and the RCRR MTRR set look like ? > > > > Well there is no /proc/mtrr. > > Linux doesn't have an RCRR driver - so you need to dump the MSRs directly > (see the Geode GX manual MSR list) and read out the msrs. Hmm, so looking at the Geode SC1200 data book, it doesn't mention mtrr, rcrr or msr. I know the Geode LX has lots of MSR documentation. Looking at the GX1 data book (which it seems the SC1200 refers to), it does mention mtrr, as not supported. I have managed to find something called the region configuration range registers, which must be RCRR. I think this is a dump of the 8 region MSRs: 0x00001810->0xbf848ba8b7f282e8 0x00001811->0xbfcb5328b7f932e8 0x00001812->0xbfe93418b7f712e8 0x00001813->0xbfbd59b8b7fb52e8 0x00001814->0xbfb5f868b7f3d2e8 0x00001815->0xbf815018b7ef42e8 0x00001816->0xbfc4c0d8b7f2a2e8 0x00001817->0xbfe1eea8b7eff2e8 This must of course mean I read them wrong because those are not the right values. Some bit ranges must be 0 and are not. Trying rdmsr from msr-tools 1.2 gives me: # ./rdmsr -x 0x00001810 rdmsr: CPU 0 cannot read MSR 0x00001810 Hmm, now what? -- Len Sorensen -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Alan Cox on 17 Nov 2009 07:00
> Trying rdmsr from msr-tools 1.2 gives me: > > # ./rdmsr -x 0x00001810 > rdmsr: CPU 0 cannot read MSR 0x00001810 > > Hmm, now what? Beats me - I thought the region registers were read/write. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |