Hello, I have a PC Chips A31G board with AGPro slot and found that nouveau does not work properly with it. Console works but reverts to software mode, X11 hangs with mouse cursor only.
The slot is physically AGP 1.5V but is wired to PCI bus as the chipset (SiS 761) does not support AGP cards. To further complicate things, the chipset has AGP capability - but only for the integrated video. You can see that in the lspci output below - the AGP card is on bus 0 and SiS card on bus 1 (AGP bus behind the AGP bridge). The SiS card is not used (can be disabled in BIOS but it does not improve things - as the AGP capability of the host bridge remains active).
As seen in dmesg below, kernel tries to set AGP 8x mode for all AGP devices, including the AGP 4x TNT2 card which is not even connected to the AGP bridge.
Setting nouveau.agpmode=0 makes it work but how can we make this case work automatically?
Radeon driver does some "ring test" and if it fails, it disables AGP mode and retries. That seems to work a bit (with R7000 but not with R7200).
But I think that we shouldn't even touch the AGP registers of other devices in this case as it might break the integrated video. But how can we know that the card is connected to the AGP bus? There does not seem to be a reliable way...
dmesg: [ 22.015411] nouveau [ DEVICE][0000:00:05.0] BOOT0 : 0x20154000 [ 22.015473] nouveau [ DEVICE][0000:00:05.0] Chipset: NV05 (NV05) [ 22.015527] nouveau [ DEVICE][0000:00:05.0] Family : NV04 [ 22.041131] nouveau [ VBIOS][0000:00:05.0] using image from PRAMIN [ 22.041194] nouveau [ VBIOS][0000:00:05.0] BMP version 5.6 [ 22.041382] nouveau [ VBIOS][0000:00:05.0] version 02.05.20.02.00 [ 22.041561] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.041867] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042079] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042133] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042245] nouveau W[ PTIMER][0000:00:05.0] unknown input clock freq [ 22.042306] nouveau [ PFB][0000:00:05.0] RAM type: SDRAM [ 22.042360] nouveau [ PFB][0000:00:05.0] RAM size: 32 MiB [ 22.042413] nouveau [ PFB][0000:00:05.0] ZCOMP: 0 tags [ 22.047063] nouveau [ CLK][0000:00:05.0] --: [ 22.047137] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.047220] agpgart-amd64 0000:00:00.0: AGP 3.0 bridge [ 22.047281] agpgart: systemd-udevd tried to set rate=x12. Setting to AGP3 x8 mode. [ 22.047348] agpgart-amd64 0000:00:00.0: putting AGP V3 device into 8x mode [ 22.047425] nouveau 0000:00:05.0: putting AGP V3 device into 8x mode [ 22.047503] pci 0000:01:00.0: putting AGP V3 device into 8x mode [ 22.047632] [TTM] Zone kernel: Available graphics memory: 239112 kiB [ 22.047685] [TTM] Initializing pool allocator [ 22.047744] [TTM] Initializing DMA pool allocator [ 22.047814] nouveau [ DRM] VRAM: 31 MiB [ 22.047865] nouveau [ DRM] GART: 64 MiB [ 22.047918] nouveau [ DRM] BMP version 5.6 [ 22.047971] nouveau W[ DRM] No DCB data found in VBIOS [ 22.051250] nouveau [ DRM] Saving VGA fonts [ 22.099912] nouveau W[ DRM] No DCB data found in VBIOS [ 22.101006] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 22.101061] [drm] Driver supports precise vblank timestamp query. [ 22.102645] nouveau [ DRM] MM: using M2MF for buffer copies [ 22.133344] nouveau [ DRM] allocated 1280x1024 fb: 0x4000, bo db2d6c00 [ 22.133545] fbcon: nouveaufb (fb0) is primary device [ 22.369387] nouveau E[ DRM] GPU lockup - switching to software fbcon [ 22.378443] Console: switching to colour frame buffer device 160x64 [ 22.395704] nouveau 0000:00:05.0: fb0: nouveaufb frame buffer device [ 22.395808] nouveau 0000:00:05.0: registered panic notifier [ 22.396783] [drm] Initialized nouveau 1.2.2 20120801 for 0000:00:05.0 on minor 0
lspci -vvnn: 00:00.0 Host bridge [0600]: Silicon Integrated Systems [SiS] 761/M761 Host [1039:0761] (rev 01) Subsystem: Elitegroup Computer Systems Device [1019:0131] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx- Latency: 32 Region 0: Memory at f0000000 (32-bit, non-prefetchable) [size=64M] Capabilities: [a0] AGP version 3.0 Status: RQ=32 Iso- ArqSz=2 Cal=3 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3+ Rate=x4,x8 Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8 Capabilities: [d0] HyperTransport: Slave or Primary Interface Command: BaseUnitID=0 UnitCnt=17 MastHost- DefDir- DUL- Link Control 0: CFlE- CST- CFE- <LkFail- Init+ EOC- TXO- <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b- Link Config 0: MLWI=16bit DwFcIn- MLWO=16bit DwFcOut- LWI=16bit DwFcInEn- LWO=16bit DwFcOutEn- Link Control 1: CFlE- CST- CFE- <LkFail+ Init- EOC+ TXO+ <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b- Link Config 1: MLWI=N/C DwFcIn- MLWO=N/C DwFcOut- LWI=N/C DwFcInEn- LWO=N/C DwFcOutEn- Revision ID: 1.05 Link Frequency 0: 800MHz Link Error 0: <Prot- <Ovfl- <EOC- CTLTm- Link Frequency Capability 0: 200MHz+ 300MHz- 400MHz+ 500MHz- 600MHz- 800MHz+ 1.0GHz+ 1.2GHz- 1.4GHz- 1.6GHz- Vend- Feature Capability: IsocFC- LDTSTOP+ CRCTM- ECTLT- 64bA+ UIDRD- Link Frequency 1: 200MHz Link Error 1: <Prot- <Ovfl- <EOC- CTLTm- Link Frequency Capability 1: 200MHz- 300MHz- 400MHz- 500MHz- 600MHz- 800MHz- 1.0GHz- 1.2GHz- 1.4GHz- 1.6GHz- Vend- Error Handling: PFlE- OFlE- PFE- OFE- EOCFE- RFE- CRCFE- SERRFE- CF- RE- PNFE- ONFE- EOCNFE- RNFE- CRCNFE- SERRNFE- Prefetchable memory behind bridge Upper: 00-00 Bus Number: 00 Capabilities: [f0] HyperTransport: Interrupt Discovery and Configuration Capabilities: [5c] HyperTransport: Revision ID: 1.05 Kernel driver in use: agpgart-amd64
00:01.0 PCI bridge [0604]: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge) [1039:0002] (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=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 Bus: primary=00, secondary=01, subordinate=01, sec-latency=64 I/O behind bridge: 0000e000-0000efff Memory behind bridge: feb00000-febfffff Prefetchable memory behind bridge: d8000000-dfffffff Secondary status: 66MHz+ FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: [a4] HyperTransport: UnitID Clumping ... 00:05.0 VGA compatible controller [0300]: NVIDIA Corporation NV5 [Riva TNT2 Model 64 / Model 64 Pro] [10de:002d] (rev 15) (prog-if 00 [VGA controller]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 (1250ns min, 250ns max) Interrupt: pin A routed to IRQ 16 Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at d6000000 (32-bit, prefetchable) [size=32M] Expansion ROM at feae0000 [disabled] [size=64K] Capabilities: [60] Power Management version 1 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [44] AGP version 2.0 Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA- ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4 Command: RQ=32 ArqSz=0 Cal=0 SBA- AGP+ GART64- 64bit- FW- Rate=x2 Kernel driver in use: nouveau ... 01:00.0 VGA compatible controller [0300]: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter [1039:6330] (rev 03) (prog-if 00 [VGA controller]) Subsystem: Silicon Integrated Systems [SiS] [M]661xX/[M]741[GX]/[M]760 PCI/AGP VGA Adapter [1039:6330] Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin A routed to IRQ 10 BIST result: 00 Region 0: Memory at d8000000 (32-bit, prefetchable) [disabled] [size=128M] Region 1: Memory at febe0000 (32-bit, non-prefetchable) [disabled] [size=128K] Region 2: I/O ports at e800 [disabled] [size=128] Capabilities: [40] 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: [50] AGP version 3.0 Status: RQ=256 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3+ Rate=x4,x8 Command: RQ=32 ArqSz=2 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8
On Sun, Sep 13, 2015 at 2:57 PM, Ondrej Zary linux@rainbow-software.org wrote:
Hello, I have a PC Chips A31G board with AGPro slot and found that nouveau does not work properly with it. Console works but reverts to software mode, X11 hangs with mouse cursor only.
The slot is physically AGP 1.5V but is wired to PCI bus as the chipset (SiS 761) does not support AGP cards. To further complicate things, the chipset has AGP capability - but only for the integrated video. You can see that in the lspci output below - the AGP card is on bus 0 and SiS card on bus 1 (AGP bus behind the AGP bridge). The SiS card is not used (can be disabled in BIOS but it does not improve things - as the AGP capability of the host bridge remains active).
I believe we can handle it with a blacklist. If the chipset just doesn't support AGP at all, we should just set agpmode=0 irrespective of the card plugged in, right?
Shouldn't the agpgart know about this and not even allow any setting at all? This is where we get the idea to set 8x AGP from. See drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c for details.
The alternative is to add to nvkm_device_agp_quirks, and just add something that matches just the host bridge vendor/device, ignoring the chip.
As seen in dmesg below, kernel tries to set AGP 8x mode for all AGP devices, including the AGP 4x TNT2 card which is not even connected to the AGP bridge.
Setting nouveau.agpmode=0 makes it work but how can we make this case work automatically?
Radeon driver does some "ring test" and if it fails, it disables AGP mode and retries. That seems to work a bit (with R7000 but not with R7200).
But I think that we shouldn't even touch the AGP registers of other devices in this case as it might break the integrated video. But how can we know that the card is connected to the AGP bus? There does not seem to be a reliable way...
dmesg: [ 22.015411] nouveau [ DEVICE][0000:00:05.0] BOOT0 : 0x20154000 [ 22.015473] nouveau [ DEVICE][0000:00:05.0] Chipset: NV05 (NV05) [ 22.015527] nouveau [ DEVICE][0000:00:05.0] Family : NV04 [ 22.041131] nouveau [ VBIOS][0000:00:05.0] using image from PRAMIN [ 22.041194] nouveau [ VBIOS][0000:00:05.0] BMP version 5.6 [ 22.041382] nouveau [ VBIOS][0000:00:05.0] version 02.05.20.02.00 [ 22.041561] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.041867] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042079] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042133] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042245] nouveau W[ PTIMER][0000:00:05.0] unknown input clock freq [ 22.042306] nouveau [ PFB][0000:00:05.0] RAM type: SDRAM [ 22.042360] nouveau [ PFB][0000:00:05.0] RAM size: 32 MiB [ 22.042413] nouveau [ PFB][0000:00:05.0] ZCOMP: 0 tags [ 22.047063] nouveau [ CLK][0000:00:05.0] --: [ 22.047137] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.047220] agpgart-amd64 0000:00:00.0: AGP 3.0 bridge [ 22.047281] agpgart: systemd-udevd tried to set rate=x12. Setting to AGP3 x8 mode. [ 22.047348] agpgart-amd64 0000:00:00.0: putting AGP V3 device into 8x mode [ 22.047425] nouveau 0000:00:05.0: putting AGP V3 device into 8x mode [ 22.047503] pci 0000:01:00.0: putting AGP V3 device into 8x mode [ 22.047632] [TTM] Zone kernel: Available graphics memory: 239112 kiB [ 22.047685] [TTM] Initializing pool allocator [ 22.047744] [TTM] Initializing DMA pool allocator [ 22.047814] nouveau [ DRM] VRAM: 31 MiB [ 22.047865] nouveau [ DRM] GART: 64 MiB [ 22.047918] nouveau [ DRM] BMP version 5.6 [ 22.047971] nouveau W[ DRM] No DCB data found in VBIOS [ 22.051250] nouveau [ DRM] Saving VGA fonts [ 22.099912] nouveau W[ DRM] No DCB data found in VBIOS [ 22.101006] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 22.101061] [drm] Driver supports precise vblank timestamp query. [ 22.102645] nouveau [ DRM] MM: using M2MF for buffer copies [ 22.133344] nouveau [ DRM] allocated 1280x1024 fb: 0x4000, bo db2d6c00 [ 22.133545] fbcon: nouveaufb (fb0) is primary device [ 22.369387] nouveau E[ DRM] GPU lockup - switching to software fbcon [ 22.378443] Console: switching to colour frame buffer device 160x64 [ 22.395704] nouveau 0000:00:05.0: fb0: nouveaufb frame buffer device [ 22.395808] nouveau 0000:00:05.0: registered panic notifier [ 22.396783] [drm] Initialized nouveau 1.2.2 20120801 for 0000:00:05.0 on minor 0
lspci -vvnn: 00:00.0 Host bridge [0600]: Silicon Integrated Systems [SiS] 761/M761 Host [1039:0761] (rev 01) Subsystem: Elitegroup Computer Systems Device [1019:0131] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx- Latency: 32 Region 0: Memory at f0000000 (32-bit, non-prefetchable) [size=64M] Capabilities: [a0] AGP version 3.0 Status: RQ=32 Iso- ArqSz=2 Cal=3 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3+ Rate=x4,x8 Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8 Capabilities: [d0] HyperTransport: Slave or Primary Interface Command: BaseUnitID=0 UnitCnt=17 MastHost- DefDir- DUL- Link Control 0: CFlE- CST- CFE- <LkFail- Init+ EOC- TXO- <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b- Link Config 0: MLWI=16bit DwFcIn- MLWO=16bit DwFcOut- LWI=16bit DwFcInEn- LWO=16bit DwFcOutEn- Link Control 1: CFlE- CST- CFE- <LkFail+ Init- EOC+ TXO+ <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b- Link Config 1: MLWI=N/C DwFcIn- MLWO=N/C DwFcOut- LWI=N/C DwFcInEn- LWO=N/C DwFcOutEn- Revision ID: 1.05 Link Frequency 0: 800MHz Link Error 0: <Prot- <Ovfl- <EOC- CTLTm- Link Frequency Capability 0: 200MHz+ 300MHz- 400MHz+ 500MHz- 600MHz- 800MHz+ 1.0GHz+ 1.2GHz- 1.4GHz- 1.6GHz- Vend- Feature Capability: IsocFC- LDTSTOP+ CRCTM- ECTLT- 64bA+ UIDRD- Link Frequency 1: 200MHz Link Error 1: <Prot- <Ovfl- <EOC- CTLTm- Link Frequency Capability 1: 200MHz- 300MHz- 400MHz- 500MHz- 600MHz- 800MHz- 1.0GHz- 1.2GHz- 1.4GHz- 1.6GHz- Vend- Error Handling: PFlE- OFlE- PFE- OFE- EOCFE- RFE- CRCFE- SERRFE- CF- RE- PNFE- ONFE- EOCNFE- RNFE- CRCNFE- SERRNFE- Prefetchable memory behind bridge Upper: 00-00 Bus Number: 00 Capabilities: [f0] HyperTransport: Interrupt Discovery and Configuration Capabilities: [5c] HyperTransport: Revision ID: 1.05 Kernel driver in use: agpgart-amd64
00:01.0 PCI bridge [0604]: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge) [1039:0002] (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=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 Bus: primary=00, secondary=01, subordinate=01, sec-latency=64 I/O behind bridge: 0000e000-0000efff Memory behind bridge: feb00000-febfffff Prefetchable memory behind bridge: d8000000-dfffffff Secondary status: 66MHz+ FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: [a4] HyperTransport: UnitID Clumping ... 00:05.0 VGA compatible controller [0300]: NVIDIA Corporation NV5 [Riva TNT2 Model 64 / Model 64 Pro] [10de:002d] (rev 15) (prog-if 00 [VGA controller]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 (1250ns min, 250ns max) Interrupt: pin A routed to IRQ 16 Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at d6000000 (32-bit, prefetchable) [size=32M] Expansion ROM at feae0000 [disabled] [size=64K] Capabilities: [60] Power Management version 1 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [44] AGP version 2.0 Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA- ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4 Command: RQ=32 ArqSz=0 Cal=0 SBA- AGP+ GART64- 64bit- FW- Rate=x2 Kernel driver in use: nouveau ... 01:00.0 VGA compatible controller [0300]: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter [1039:6330] (rev 03) (prog-if 00 [VGA controller]) Subsystem: Silicon Integrated Systems [SiS] [M]661xX/[M]741[GX]/[M]760 PCI/AGP VGA Adapter [1039:6330] Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin A routed to IRQ 10 BIST result: 00 Region 0: Memory at d8000000 (32-bit, prefetchable) [disabled] [size=128M] Region 1: Memory at febe0000 (32-bit, non-prefetchable) [disabled] [size=128K] Region 2: I/O ports at e800 [disabled] [size=128] Capabilities: [40] 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: [50] AGP version 3.0 Status: RQ=256 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3+ Rate=x4,x8 Command: RQ=32 ArqSz=2 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8
-- Ondrej Zary -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
On Sunday 13 September 2015 21:12:25 Ilia Mirkin wrote:
On Sun, Sep 13, 2015 at 2:57 PM, Ondrej Zary linux@rainbow-software.org wrote:
Hello, I have a PC Chips A31G board with AGPro slot and found that nouveau does not work properly with it. Console works but reverts to software mode, X11 hangs with mouse cursor only.
The slot is physically AGP 1.5V but is wired to PCI bus as the chipset (SiS 761) does not support AGP cards. To further complicate things, the chipset has AGP capability - but only for the integrated video. You can see that in the lspci output below - the AGP card is on bus 0 and SiS card on bus 1 (AGP bus behind the AGP bridge). The SiS card is not used (can be disabled in BIOS but it does not improve things - as the AGP capability of the host bridge remains active).
I believe we can handle it with a blacklist. If the chipset just doesn't support AGP at all, we should just set agpmode=0 irrespective of the card plugged in, right?
Shouldn't the agpgart know about this and not even allow any setting at all? This is where we get the idea to set 8x AGP from. See drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c for details.
The chipset does not support AGP slot but supports AGP for the integrated video. So it shouldn't be completely disabled.
The alternative is to add to nvkm_device_agp_quirks, and just add something that matches just the host bridge vendor/device, ignoring the chip.
Something like this?
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c index 814cb51..385a90f 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c @@ -35,6 +35,8 @@ static const struct nvkm_device_agp_quirk nvkm_device_agp_quirks[] = { /* VIA Apollo PRO133x / GeForce FX 5600 Ultra - fdo#20341 */ { PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_NVIDIA, 0x0311, 2 }, + /* SiS 761 does not support AGP cards, use PCI mode */ + { PCI_VENDOR_ID_SI, 0x0761, PCI_ANY_ID, PCI_ANY_ID, 0 }, {}, };
@@ -137,8 +139,10 @@ nvkm_agp_ctor(struct nvkm_pci *pci) while (quirk->hostbridge_vendor) { if (info.device->vendor == quirk->hostbridge_vendor && info.device->device == quirk->hostbridge_device && - pci->pdev->vendor == quirk->chip_vendor && - pci->pdev->device == quirk->chip_device) { + (quirk->chip_vendor == (u16)PCI_ANY_ID || + pci->pdev->vendor == quirk->chip_vendor) && + (quirk->chip_device == (u16)PCI_ANY_ID || + pci->pdev->device == quirk->chip_device)) { nvkm_info(subdev, "forcing default agp mode to %dX, " "use NvAGP=<mode> to override\n", quirk->mode);
On Sun, Sep 13, 2015 at 6:01 PM, Ondrej Zary linux@rainbow-software.org wrote:
On Sunday 13 September 2015 21:12:25 Ilia Mirkin wrote:
On Sun, Sep 13, 2015 at 2:57 PM, Ondrej Zary linux@rainbow-software.org wrote:
Hello, I have a PC Chips A31G board with AGPro slot and found that nouveau does not work properly with it. Console works but reverts to software mode, X11 hangs with mouse cursor only.
The slot is physically AGP 1.5V but is wired to PCI bus as the chipset (SiS 761) does not support AGP cards. To further complicate things, the chipset has AGP capability - but only for the integrated video. You can see that in the lspci output below - the AGP card is on bus 0 and SiS card on bus 1 (AGP bus behind the AGP bridge). The SiS card is not used (can be disabled in BIOS but it does not improve things - as the AGP capability of the host bridge remains active).
I believe we can handle it with a blacklist. If the chipset just doesn't support AGP at all, we should just set agpmode=0 irrespective of the card plugged in, right?
Shouldn't the agpgart know about this and not even allow any setting at all? This is where we get the idea to set 8x AGP from. See drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c for details.
The chipset does not support AGP slot but supports AGP for the integrated video. So it shouldn't be completely disabled.
The alternative is to add to nvkm_device_agp_quirks, and just add something that matches just the host bridge vendor/device, ignoring the chip.
Something like this?
Yes, precisely what I had in mind. I don't know if this is the "right" solution, but it'll definitely work. Ideally we'd somehow find out from the agpgart that we shouldn't be trying to use AGP, since adding this quirk to every agp-supporting driver seems like a pain. OTOH this is long-dead hardware, so a quick hack like this is fine by me. radeon has a much more extensive list IIRC, may want to add it in there as well for good measure if it's not already there.
-ilia
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c index 814cb51..385a90f 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c @@ -35,6 +35,8 @@ static const struct nvkm_device_agp_quirk nvkm_device_agp_quirks[] = { /* VIA Apollo PRO133x / GeForce FX 5600 Ultra - fdo#20341 */ { PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_NVIDIA, 0x0311, 2 },
/* SiS 761 does not support AGP cards, use PCI mode */{ PCI_VENDOR_ID_SI, 0x0761, PCI_ANY_ID, PCI_ANY_ID, 0 }, {},};
@@ -137,8 +139,10 @@ nvkm_agp_ctor(struct nvkm_pci *pci) while (quirk->hostbridge_vendor) { if (info.device->vendor == quirk->hostbridge_vendor && info.device->device == quirk->hostbridge_device &&
pci->pdev->vendor == quirk->chip_vendor &&pci->pdev->device == quirk->chip_device) {
(quirk->chip_vendor == (u16)PCI_ANY_ID ||pci->pdev->vendor == quirk->chip_vendor) &&(quirk->chip_device == (u16)PCI_ANY_ID ||pci->pdev->device == quirk->chip_device)) { nvkm_info(subdev, "forcing default agp mode to %dX, " "use NvAGP=<mode> to override\n", quirk->mode);-- Ondrej Zary
On Sun, Sep 13, 2015 at 2:57 PM, Ondrej Zary linux@rainbow-software.org wrote:
Hello, I have a PC Chips A31G board with AGPro slot and found that nouveau does not work properly with it. Console works but reverts to software mode, X11 hangs with mouse cursor only.
The slot is physically AGP 1.5V but is wired to PCI bus as the chipset (SiS 761) does not support AGP cards. To further complicate things, the chipset has AGP capability - but only for the integrated video. You can see that in the lspci output below - the AGP card is on bus 0 and SiS card on bus 1 (AGP bus behind the AGP bridge). The SiS card is not used (can be disabled in BIOS but it does not improve things - as the AGP capability of the host bridge remains active).
As seen in dmesg below, kernel tries to set AGP 8x mode for all AGP devices, including the AGP 4x TNT2 card which is not even connected to the AGP bridge.
Setting nouveau.agpmode=0 makes it work but how can we make this case work automatically?
Radeon driver does some "ring test" and if it fails, it disables AGP mode and retries. That seems to work a bit (with R7000 but not with R7200).
You can boot with radeon.agpmode=-1 to force pci mode.
Alex
But I think that we shouldn't even touch the AGP registers of other devices in this case as it might break the integrated video. But how can we know that the card is connected to the AGP bus? There does not seem to be a reliable way...
dmesg: [ 22.015411] nouveau [ DEVICE][0000:00:05.0] BOOT0 : 0x20154000 [ 22.015473] nouveau [ DEVICE][0000:00:05.0] Chipset: NV05 (NV05) [ 22.015527] nouveau [ DEVICE][0000:00:05.0] Family : NV04 [ 22.041131] nouveau [ VBIOS][0000:00:05.0] using image from PRAMIN [ 22.041194] nouveau [ VBIOS][0000:00:05.0] BMP version 5.6 [ 22.041382] nouveau [ VBIOS][0000:00:05.0] version 02.05.20.02.00 [ 22.041561] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.041867] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042079] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042133] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.042245] nouveau W[ PTIMER][0000:00:05.0] unknown input clock freq [ 22.042306] nouveau [ PFB][0000:00:05.0] RAM type: SDRAM [ 22.042360] nouveau [ PFB][0000:00:05.0] RAM size: 32 MiB [ 22.042413] nouveau [ PFB][0000:00:05.0] ZCOMP: 0 tags [ 22.047063] nouveau [ CLK][0000:00:05.0] --: [ 22.047137] nouveau W[ VBIOS][0000:00:05.0] DCB table not found [ 22.047220] agpgart-amd64 0000:00:00.0: AGP 3.0 bridge [ 22.047281] agpgart: systemd-udevd tried to set rate=x12. Setting to AGP3 x8 mode. [ 22.047348] agpgart-amd64 0000:00:00.0: putting AGP V3 device into 8x mode [ 22.047425] nouveau 0000:00:05.0: putting AGP V3 device into 8x mode [ 22.047503] pci 0000:01:00.0: putting AGP V3 device into 8x mode [ 22.047632] [TTM] Zone kernel: Available graphics memory: 239112 kiB [ 22.047685] [TTM] Initializing pool allocator [ 22.047744] [TTM] Initializing DMA pool allocator [ 22.047814] nouveau [ DRM] VRAM: 31 MiB [ 22.047865] nouveau [ DRM] GART: 64 MiB [ 22.047918] nouveau [ DRM] BMP version 5.6 [ 22.047971] nouveau W[ DRM] No DCB data found in VBIOS [ 22.051250] nouveau [ DRM] Saving VGA fonts [ 22.099912] nouveau W[ DRM] No DCB data found in VBIOS [ 22.101006] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 22.101061] [drm] Driver supports precise vblank timestamp query. [ 22.102645] nouveau [ DRM] MM: using M2MF for buffer copies [ 22.133344] nouveau [ DRM] allocated 1280x1024 fb: 0x4000, bo db2d6c00 [ 22.133545] fbcon: nouveaufb (fb0) is primary device [ 22.369387] nouveau E[ DRM] GPU lockup - switching to software fbcon [ 22.378443] Console: switching to colour frame buffer device 160x64 [ 22.395704] nouveau 0000:00:05.0: fb0: nouveaufb frame buffer device [ 22.395808] nouveau 0000:00:05.0: registered panic notifier [ 22.396783] [drm] Initialized nouveau 1.2.2 20120801 for 0000:00:05.0 on minor 0
lspci -vvnn: 00:00.0 Host bridge [0600]: Silicon Integrated Systems [SiS] 761/M761 Host [1039:0761] (rev 01) Subsystem: Elitegroup Computer Systems Device [1019:0131] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx- Latency: 32 Region 0: Memory at f0000000 (32-bit, non-prefetchable) [size=64M] Capabilities: [a0] AGP version 3.0 Status: RQ=32 Iso- ArqSz=2 Cal=3 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3+ Rate=x4,x8 Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8 Capabilities: [d0] HyperTransport: Slave or Primary Interface Command: BaseUnitID=0 UnitCnt=17 MastHost- DefDir- DUL- Link Control 0: CFlE- CST- CFE- <LkFail- Init+ EOC- TXO- <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b- Link Config 0: MLWI=16bit DwFcIn- MLWO=16bit DwFcOut- LWI=16bit DwFcInEn- LWO=16bit DwFcOutEn- Link Control 1: CFlE- CST- CFE- <LkFail+ Init- EOC+ TXO+ <CRCErr=0 IsocEn- LSEn- ExtCTL- 64b- Link Config 1: MLWI=N/C DwFcIn- MLWO=N/C DwFcOut- LWI=N/C DwFcInEn- LWO=N/C DwFcOutEn- Revision ID: 1.05 Link Frequency 0: 800MHz Link Error 0: <Prot- <Ovfl- <EOC- CTLTm- Link Frequency Capability 0: 200MHz+ 300MHz- 400MHz+ 500MHz- 600MHz- 800MHz+ 1.0GHz+ 1.2GHz- 1.4GHz- 1.6GHz- Vend- Feature Capability: IsocFC- LDTSTOP+ CRCTM- ECTLT- 64bA+ UIDRD- Link Frequency 1: 200MHz Link Error 1: <Prot- <Ovfl- <EOC- CTLTm- Link Frequency Capability 1: 200MHz- 300MHz- 400MHz- 500MHz- 600MHz- 800MHz- 1.0GHz- 1.2GHz- 1.4GHz- 1.6GHz- Vend- Error Handling: PFlE- OFlE- PFE- OFE- EOCFE- RFE- CRCFE- SERRFE- CF- RE- PNFE- ONFE- EOCNFE- RNFE- CRCNFE- SERRNFE- Prefetchable memory behind bridge Upper: 00-00 Bus Number: 00 Capabilities: [f0] HyperTransport: Interrupt Discovery and Configuration Capabilities: [5c] HyperTransport: Revision ID: 1.05 Kernel driver in use: agpgart-amd64
00:01.0 PCI bridge [0604]: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge) [1039:0002] (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=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 Bus: primary=00, secondary=01, subordinate=01, sec-latency=64 I/O behind bridge: 0000e000-0000efff Memory behind bridge: feb00000-febfffff Prefetchable memory behind bridge: d8000000-dfffffff Secondary status: 66MHz+ FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: [a4] HyperTransport: UnitID Clumping ... 00:05.0 VGA compatible controller [0300]: NVIDIA Corporation NV5 [Riva TNT2 Model 64 / Model 64 Pro] [10de:002d] (rev 15) (prog-if 00 [VGA controller]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 (1250ns min, 250ns max) Interrupt: pin A routed to IRQ 16 Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at d6000000 (32-bit, prefetchable) [size=32M] Expansion ROM at feae0000 [disabled] [size=64K] Capabilities: [60] Power Management version 1 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [44] AGP version 2.0 Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA- ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4 Command: RQ=32 ArqSz=0 Cal=0 SBA- AGP+ GART64- 64bit- FW- Rate=x2 Kernel driver in use: nouveau ... 01:00.0 VGA compatible controller [0300]: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter [1039:6330] (rev 03) (prog-if 00 [VGA controller]) Subsystem: Silicon Integrated Systems [SiS] [M]661xX/[M]741[GX]/[M]760 PCI/AGP VGA Adapter [1039:6330] Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin A routed to IRQ 10 BIST result: 00 Region 0: Memory at d8000000 (32-bit, prefetchable) [disabled] [size=128M] Region 1: Memory at febe0000 (32-bit, non-prefetchable) [disabled] [size=128K] Region 2: I/O ports at e800 [disabled] [size=128] Capabilities: [40] 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: [50] AGP version 3.0 Status: RQ=256 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3+ Rate=x4,x8 Command: RQ=32 ArqSz=2 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8
-- Ondrej Zary _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
On Monday 14 September 2015 04:31:43 Alex Deucher wrote:
On Sun, Sep 13, 2015 at 2:57 PM, Ondrej Zary linux@rainbow-software.org wrote:
Hello, I have a PC Chips A31G board with AGPro slot and found that nouveau does not work properly with it. Console works but reverts to software mode, X11 hangs with mouse cursor only.
The slot is physically AGP 1.5V but is wired to PCI bus as the chipset (SiS 761) does not support AGP cards. To further complicate things, the chipset has AGP capability - but only for the integrated video. You can see that in the lspci output below - the AGP card is on bus 0 and SiS card on bus 1 (AGP bus behind the AGP bridge). The SiS card is not used (can be disabled in BIOS but it does not improve things - as the AGP capability of the host bridge remains active).
As seen in dmesg below, kernel tries to set AGP 8x mode for all AGP devices, including the AGP 4x TNT2 card which is not even connected to the AGP bridge.
Setting nouveau.agpmode=0 makes it work but how can we make this case work automatically?
Radeon driver does some "ring test" and if it fails, it disables AGP mode and retries. That seems to work a bit (with R7000 but not with R7200).
You can boot with radeon.agpmode=-1 to force pci mode.
Found out that the autoswitch to PCI mode works correctly. Radeon 7000 works without any parameters (first ring test fails, then the driver disables AGP and the second ring test succeeds).
Radeon 7200 does not work even with agpmode=-1 - ring test fails (both ring test fail if booted without the agpmode=-1 parameter):
[ 13.111087] [drm] radeon kernel modesetting enabled. [ 13.679593] [drm] initializing kernel modesetting (R100 0x1002:0x5144 0x1002:0x02AA). [ 13.679669] [drm] Forcing AGP to PCI mode [ 13.679737] [drm] register mmio base: 0xFEA00000 [ 13.679790] [drm] register mmio size: 524288 [ 13.683710] radeon 0000:00:05.0: VRAM: 128M 0x00000000D0000000 - 0x00000000D7FFFFFF (32M used) [ 13.683782] radeon 0000:00:05.0: GTT: 512M 0x00000000B0000000 - 0x00000000CFFFFFFF [ 13.684802] [drm] Detected VRAM RAM=128M, BAR=128M [ 13.684856] [drm] RAM width 128bits DDR [ 13.687628] [TTM] Zone kernel: Available graphics memory: 240180 kiB [ 13.687686] [TTM] Initializing pool allocator [ 13.687778] [drm] radeon: 32M of VRAM memory ready [ 13.687831] [drm] radeon: 512M of GTT memory ready. [ 13.687904] [drm] GART: num cpu pages 131072, num gpu pages 131072 [ 13.690406] [drm] PCI GART of 512M enabled (table at 0x000000001A680000). [ 13.690510] radeon 0000:00:05.0: WB disabled [ 13.690566] radeon 0000:00:05.0: fence driver on ring 0 use gpu addr 0x00000000b0000000 and cpu addr 0xc0051000 [ 13.690638] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 13.690693] [drm] Driver supports precise vblank timestamp query. [ 13.690780] [drm] radeon: irq initialized. [ 13.690844] [drm] Loading R100 Microcode [ 14.575464] [drm] radeon: ring at 0x00000000B0001000 [ 14.750114] [drm:r100_ring_test [radeon]] *ERROR* radeon: ring test failed (scratch(0x15E4)=0xCAFEDEAD) [ 14.750423] [drm:r100_cp_init [radeon]] *ERROR* radeon: cp isn't working (-22). [ 14.750631] radeon 0000:00:05.0: failed initializing CP (-22). [ 14.750770] radeon 0000:00:05.0: Disabling GPU acceleration [ 14.925219] [drm:r100_cp_fini [radeon]] *ERROR* Wait for CP idle timeout, shutting down CP. [ 14.927652] [drm] radeon: cp finalized [ 14.933949] [drm] Radeon Display Connectors [ 14.934079] [drm] Connector 0: [ 14.934196] [drm] DVI-I-1 [ 14.934310] [drm] HPD1 [ 14.934424] [drm] DDC: 0x64 0x64 0x64 0x64 0x64 0x64 0x64 0x64 [ 14.934563] [drm] Encoders: [ 14.934679] [drm] CRT1: INTERNAL_DAC1 [ 14.934804] [drm] DFP1: INTERNAL_TMDS1 [ 14.991877] [drm] fb mappable at 0xD0040000 [ 14.992023] [drm] vram apper at 0xD0000000 [ 14.992147] [drm] size 1310720 [ 14.992264] [drm] fb depth is 8 [ 14.992381] [drm] pitch is 1280 [ 14.993653] fbcon: radeondrmfb (fb0) is primary device [ 15.072448] Console: switching to colour frame buffer device 160x64 [ 15.096165] radeon 0000:00:05.0: fb0: radeondrmfb frame buffer device [ 15.096581] [drm] Initialized radeon 2.43.0 20080528 for 0000:00:05.0 on minor 0
dri-devel@lists.freedesktop.org
-
Alex Deucher -
Ilia Mirkin -
Ondrej Zary