Re: PCI conflicts with latest kernels

From: Bjorn Helgaas
Date: Sun Mar 14 2010 - 17:19:34 EST

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On Sun, 2010-03-14 at 21:12 +0100, Rafael J. Wysocki wrote:
> [CCing linux-pci]
>
> On Sunday 14 March 2010, Giampaolo Bellini wrote:
> > Hi all...
> >
> > I'm experimenting PCI address space collisions on an ICOP PC104
> > VDX-6357 motherboard (with no cards/expansion at all) and kernels
> > 2.6.33/34
> >
> > collisions where not there with kernel 2.6.29 (I start with this
> > .config and I've done a make oldconfig for 2.6.33/34).
> >
> > I have no ACPI support and I'm using the sisfb framebuffer on a XGI
> > Technology Inc. (eXtreme Graphics Innovation) Volari Z7 chipset.

If you apply the patches here: http://lkml.org/lkml/2010/3/11/512
on 2.6.34-rc1, you'll get a little more information about the
collisions. /proc/iomem may also be helpful.

The messages have changed somewhat between 2.6.29 and the current
kernel, but from the snippets you posted, I don't see any functional
differences.

Bjorn

> > -------------------------------------------------------------------
> > cat /proc/cmdline
> > -------------------------------------------------------------------
> > root=/dev/sda2 quiet video=sisfb:640x480-32 ar8.debug=1
> > ar8.outputs=0x80 BOOT_IMAGE=vmlinuz-2.6.33-r3-vdx
> >
> >
> > -------------------------------------------------------------------
> > dmesg kernel 2.6.33:
> > -------------------------------------------------------------------
> > Linux version 2.6.33-ibty3-vdx (root@nibble) (gcc version 4.2.4
> > (Ubuntu 4.2.4-1ubuntu3)) #22 Sun Mar 14 00:35:18 CET 2010
> > CPU: vendor_id 'Vortex86 SoC' unknown, using generic init.
> > CPU: Your system may be unstable.
> > BIOS-provided physical RAM map:
> > BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
> > BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
> > BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
> > BIOS-e820: 0000000000100000 - 0000000020000000 (usable)
> > BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved)
> > Notice: NX (Execute Disable) protection missing in CPU or disabled in BIOS!
> > DMI not present or invalid.
> > last_pfn = 0x20000 max_arch_pfn = 0x100000
> > initial memory mapped : 0 - 01800000
> > init_memory_mapping: 0000000000000000-0000000020000000
> > 0000000000 - 0020000000 page 4k
> > kernel direct mapping tables up to 20000000 @ 7000-8a000
> > 512MB LOWMEM available.
> > mapped low ram: 0 - 20000000
> > low ram: 0 - 20000000
> > node 0 low ram: 00000000 - 20000000
> > node 0 bootmap 00001000 - 00005000
> > (6 early reservations) ==> bootmem [0000000000 - 0020000000]
> > #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000]
> > #1 [0001000000 - 00012f6154] TEXT DATA BSS ==> [0001000000 - 00012f6154]
> > #2 [000009fc00 - 0000100000] BIOS reserved ==> [000009fc00 - 0000100000]
> > #3 [00012f7000 - 00012fd000] BRK ==> [00012f7000 - 00012fd000]
> > #4 [0000007000 - 0000081000] PGTABLE ==> [0000007000 - 0000081000]
> > #5 [0000001000 - 0000005000] BOOTMAP ==> [0000001000 - 0000005000]
> > Zone PFN ranges:
> > DMA 0x00000000 -> 0x00001000
> > Normal 0x00001000 -> 0x00020000
> > Movable zone start PFN for each node
> > early_node_map[2] active PFN ranges
> > 0: 0x00000000 -> 0x0000009f
> > 0: 0x00000100 -> 0x00020000
> > On node 0 totalpages: 130975
> > free_area_init_node: node 0, pgdat c12a2004, node_mem_map c12fd000
> > DMA zone: 32 pages used for memmap
> > DMA zone: 0 pages reserved
> > DMA zone: 3967 pages, LIFO batch:0
> > Normal zone: 992 pages used for memmap
> > Normal zone: 125984 pages, LIFO batch:31
> > Allocating PCI resources starting at 20000000 (gap: 20000000:df000000)
> > Built 1 zonelists in Zone order, mobility grouping on. Total pages: 129951
> > Kernel command line: root=/dev/sda2 quiet video=sisfb:640x480-32
> > ar8.debug=1 ar8.outputs=0x80 BOOT_IMAGE=vmlinuz-2.6.33-r3-vdx
> > PID hash table entries: 2048 (order: 1, 8192 bytes)
> > Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
> > Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
> > Initializing CPU#0
> > Memory: 515600k/524288k available (1844k kernel code, 8044k reserved,
> > 863k data, 212k init, 0k highmem)
> > virtual kernel memory layout:
> > fixmap : 0xfffe5000 - 0xfffff000 ( 104 kB)
> > vmalloc : 0xe0800000 - 0xfffe3000 ( 503 MB)
> > lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
> > .init : 0xc12a5000 - 0xc12da000 ( 212 kB)
> > .data : 0xc11cd056 - 0xc12a4ed8 ( 863 kB)
> > .text : 0xc1000000 - 0xc11cd056 (1844 kB)
> > Checking if this processor honours the WP bit even in supervisor mode...Ok.
> > Hierarchical RCU implementation.
> > NR_IRQS:16
> > Console: colour VGA+ 80x25
> > console [tty0] enabled
> > Fast TSC calibration using PIT
> > Detected 800.001 MHz processor.
> > Calibrating delay loop (skipped), value calculated using timer
> > frequency.. 1600.00 BogoMIPS (lpj=3200004)
> > Mount-cache hash table entries: 512
> > Performance Events:
> > CPU: Vortex86 SoC 05/02 stepping 02
> > Checking 'hlt' instruction... OK.
> > NET: Registered protocol family 16
> > PCI: PCI BIOS revision 3.00 entry at 0xf0031, last bus=0
> > PCI: Using configuration type 1 for base access
> > bio: create slab <bio-0> at 0
> > vgaarb: loaded
> > SCSI subsystem initialized
> > libata version 3.00 loaded.
> > usbcore: registered new interface driver usbfs
> > usbcore: registered new interface driver hub
> > usbcore: registered new device driver usb
> > PCI: Probing PCI hardware
> > PCI: Probing PCI hardware (bus 00)
> > pci 0000:00:01.0: reg 10: [io 0xdc00-0xdcff]
> > pci 0000:00:01.0: reg 14: [mem 0xfefbb000-0xfefbb0ff]
> > pci 0000:00:01.0: supports D1 D2
> > pci 0000:00:01.0: PME# supported from D1 D2 D3hot D3cold
> > pci 0000:00:01.0: PME# disabled
> > pci 0000:00:02.0: reg 10: [io 0xdd00-0xddff]
> > pci 0000:00:02.0: reg 14: [mem 0xfefbb400-0xfefbb4ff]
> > pci 0000:00:02.0: supports D1 D2
> > pci 0000:00:02.0: PME# supported from D1 D2 D3hot D3cold
> > pci 0000:00:02.0: PME# disabled
> > pci 0000:00:03.0: reg 10: [mem 0xf8000000-0xfbffffff pref]
> > pci 0000:00:03.0: reg 14: [mem 0xfefc0000-0xfeffffff]
> > pci 0000:00:03.0: reg 18: [io 0xdf80-0xdfff]
> > pci 0000:00:03.0: supports D1 D2
> > pci 0000:00:08.0: reg 10: [io 0xde00-0xdeff]
> > pci 0000:00:08.0: reg 14: [mem 0xfefbb800-0xfefbb8ff]
> > pci 0000:00:08.0: reg 30: [mem 0xfefa0000-0xfefaffff pref]
> > pci 0000:00:0b.0: reg 10: [mem 0x000e0000-0x000e0fff]
> > pci 0000:00:0b.1: reg 10: [mem 0x000e1000-0x000e10ff]
> > pci 0000:00:0c.0: reg 10: [io 0x01f0-0x01f7]
> > pci 0000:00:0c.0: reg 14: [io 0x03f4-0x03f7]
> > pci 0000:00:0c.0: reg 18: [io 0x0170-0x0177]
> > pci 0000:00:0c.0: reg 1c: [io 0x0374-0x0377]
> > pci 0000:00:0c.0: reg 20: [io 0xfff0-0xffff]
> > pci 0000:00:0c.0: reg 30: [mem 0x00000000-0x0001ffff pref]
> > vgaarb: device added: PCI:0000:00:03.0,decodes=io+mem,owns=io+mem,locks=none
> > pci 0000:00:07.0: default IRQ router [17f3:6031]
> > PCI: pci_cache_line_size set to 32 bytes
> >
> >
> > pci 0000:00:0b.0: address space collision: [mem 0x000e0000-0x000e0fff]
> > already in use
> > pci 0000:00:0b.0: can't reserve [mem 0x000e0000-0x000e0fff]
> > pci 0000:00:0b.1: address space collision: [mem 0x000e1000-0x000e10ff]
> > already in use
> > pci 0000:00:0b.1: can't reserve [mem 0x000e1000-0x000e10ff]
> >
> >
> > Switching to clocksource tsc
> > pci 0000:00:0c.0: BAR 6: assigned [mem 0x20000000-0x2001ffff pref]
> > pci 0000:00:0b.0: BAR 0: assigned [mem 0x20020000-0x20020fff]
> > pci 0000:00:0b.0: BAR 0: set to [mem 0x20020000-0x20020fff] (PCI
> > address [0x20020000-0x20020fff]
> > pci 0000:00:0b.1: BAR 0: assigned [mem 0x20021000-0x200210ff]
> > pci 0000:00:0b.1: BAR 0: set to [mem 0x20021000-0x200210ff] (PCI
> > address [0x20021000-0x200210ff]
> > pci_bus 0000:00: resource 0 [io 0x0000-0xffff]
> > pci_bus 0000:00: resource 1 [mem 0x00000000-0xffffffff]
> > ...
> > -------------------------------------------------------------------
> >
> >
> > -------------------------------------------------------------------
> > lspci
> > -------------------------------------------------------------------
> > 00:00.0 Host bridge: RDC Semiconductor, Inc. Unknown device 6021 (rev 01)
> > 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
> >
> > 00:01.0 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-
> > Latency: 128 (8000ns min, 16000ns max)
> > Interrupt: pin A routed to IRQ 9
> > Region 0: I/O ports at dc00 [size=256]
> > Region 1: Memory at fefbb000 (32-bit, non-prefetchable) [size=256]
> > Capabilities: [50] Power Management version 2
> > Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
> > PME(D0-,D1+,D2+,D3hot+,D3cold+)
> > Status: D0 PME-Enable- DSel=0 DScale=0 PME-
> >
> > 00:02.0 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-
> > Latency: 128 (8000ns min, 16000ns max)
> > Interrupt: pin A routed to IRQ 6
> > Region 0: I/O ports at dd00 [size=256]
> > Region 1: Memory at fefbb400 (32-bit, non-prefetchable) [size=256]
> > Capabilities: [50] Power Management version 2
> > Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
> > PME(D0-,D1+,D2+,D3hot+,D3cold+)
> > Status: D0 PME-Enable- DSel=0 DScale=0 PME-
> >
> > 00:03.0 VGA compatible controller: XGI Technology Inc. (eXtreme
> > Graphics Innovation) Volari Z7 (prog-if 00 [VGA controller])
> > Subsystem: XGI Technology Inc. (eXtreme Graphics Innovation) Volari Z7
> > 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-
> > BIST result: 00
> > Region 0: Memory at f8000000 (32-bit, prefetchable) [size=64M]
> > Region 1: Memory at fefc0000 (32-bit, non-prefetchable) [size=256K]
> > Region 2: I/O ports at df80 [size=128]
> > Capabilities: [40] 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-
> >
> > 00:07.0 ISA bridge: RDC Semiconductor, Inc. Unknown device 6031 (rev 01)
> > Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop-
> > ParErr- Stepping- SERR- FastB2B-
> > Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=?? >TAbort-
> > <TAbort- <MAbort- >SERR- <PERR-
> > Latency: 0
> >
> > 00:08.0 Ethernet controller: RDC Semiconductor, Inc. R6040 MAC Controller
> > 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: 128 (750ns min, 2000ns max)
> > Interrupt: pin A routed to IRQ 5
> > Region 0: I/O ports at de00 [size=256]
> > Region 1: Memory at fefbb800 (32-bit, non-prefetchable) [size=256]
> > Expansion ROM at fefa0000 [disabled] [size=64K]
> >
> > 00:0b.0 USB Controller: RDC Semiconductor, Inc. R6060 USB 1.1
> > Controller (rev 11) (prog-if 10 [OHCI])
> > 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: 128, Cache Line Size: 16 bytes
> > Interrupt: pin A routed to IRQ 15
> > Region 0: Memory at 20020000 (32-bit, non-prefetchable) [size=4K]
> >
> > 00:0b.1 USB Controller: RDC Semiconductor, Inc. R6061 USB 2.0
> > Controller (rev 02) (prog-if 20 [EHCI])
> > 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: 128, Cache Line Size: 16 bytes
> > Interrupt: pin B routed to IRQ 9
> > Region 0: Memory at 20021000 (32-bit, non-prefetchable) [size=256]
> >
> > 00:0c.0 Mass storage controller: RDC Semiconductor, Inc. Unknown
> > device 1010 (rev 13)
> > Subsystem: RDC Semiconductor, Inc. Unknown device 1010
> > 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 (2000ns min, 2000ns max)
> > Interrupt: pin A routed to IRQ 14
> > Region 0: I/O ports at 01f0 [size=8]
> > Region 1: I/O ports at 03f4 [size=4]
> > Region 2: I/O ports at 0170 [size=8]
> > Region 3: I/O ports at 0374 [size=4]
> > Region 4: I/O ports at fff0 [size=16]
> > [virtual] Expansion ROM at 20000000 [disabled] [size=128K]
> > 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-
> > -------------------------------------------------------------------
> >
> > -------------------------------------------------------------------
> > /proc/cpuinfo
> > -------------------------------------------------------------------
> > processor : 0
> > vendor_id : Vortex86 SoC
> > cpu family : 5
> > model : 2
> > model name : 05/02
> > stepping : 2
> > cpu MHz : 800.001
> > fdiv_bug : no
> > hlt_bug : no
> > f00f_bug : no
> > coma_bug : no
> > fpu : yes
> > fpu_exception : yes
> > cpuid level : 1
> > wp : yes
> > flags : fpu tsc cx8
> > bogomips : 1600.00
> > clflush size : 32
> > cache_alignment : 32
> > address sizes : 32 bits physical, 32 bits virtual
> > power management:
> >
> >
> > -------------------------------------------------------------------
> > dmesg kernel 2.6.29:
> > -------------------------------------------------------------------
> > ...
> > PCI: Probing PCI hardware
> > PCI: Probing PCI hardware (bus 00)
> > pci 0000:00:01.0: reg 10 io port: [0xdc00-0xdcff]
> > pci 0000:00:01.0: reg 14 32bit mmio: [0xfefbb000-0xfefbb0ff]
> > pci 0000:00:01.0: supports D1 D2
> > pci 0000:00:01.0: PME# supported from D1 D2 D3hot D3cold
> > pci 0000:00:01.0: PME# disabled
> > pci 0000:00:02.0: reg 10 io port: [0xdd00-0xddff]
> > pci 0000:00:02.0: reg 14 32bit mmio: [0xfefbb400-0xfefbb4ff]
> > pci 0000:00:02.0: supports D1 D2
> > pci 0000:00:02.0: PME# supported from D1 D2 D3hot D3cold
> > pci 0000:00:02.0: PME# disabled
> > pci 0000:00:03.0: reg 10 32bit mmio: [0xf8000000-0xfbffffff]
> > pci 0000:00:03.0: reg 14 32bit mmio: [0xfefc0000-0xfeffffff]
> > pci 0000:00:03.0: reg 18 io port: [0xdf80-0xdfff]
> > pci 0000:00:03.0: supports D1 D2
> > pci 0000:00:08.0: reg 10 io port: [0xde00-0xdeff]
> > pci 0000:00:08.0: reg 14 32bit mmio: [0xfefbb800-0xfefbb8ff]
> > pci 0000:00:08.0: reg 30 32bit mmio: [0xfefa0000-0xfefaffff]
> > pci 0000:00:0b.0: reg 10 32bit mmio: [0x0e0000-0x0e0fff]
> > pci 0000:00:0b.1: reg 10 32bit mmio: [0x0e1000-0x0e10ff]
> > pci 0000:00:0c.0: reg 10 io port: [0x1f0-0x1f7]
> > pci 0000:00:0c.0: reg 14 io port: [0x3f4-0x3f7]
> > pci 0000:00:0c.0: reg 18 io port: [0x170-0x177]
> > pci 0000:00:0c.0: reg 1c io port: [0x374-0x377]
> > pci 0000:00:0c.0: reg 20 io port: [0xfff0-0xffff]
> > pci 0000:00:0c.0: reg 30 32bit mmio: [0x000000-0x01ffff]
> > pci 0000:00:07.0: default IRQ router [17f3:6031]
> > pci 0000:00:0b.0: BAR 0: can't allocate resource
> > pci 0000:00:0b.1: BAR 0: can't allocate resource
> > ...
> > -------------------------------------------------------------------
> > --
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Next message: Bill Davidsen: "Re: 2.6.34-rc1: regression: ^Z no longer stops sound"
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