Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24)

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To: Thomas Meyer <thomas@...>

Cc: Rafael J. Wysocki <rjw@...>, LKML <linux-kernel@...>, Adrian Bunk <bunk@...>, Andrew Morton <akpm@...>, Linus Torvalds <torvalds@...>, Natalie Protasevich <protasnb@...>

Subject: Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24)

Date: Saturday, March 22, 2008 - 3:02 pm

I wrote:
quoted text> Thomas Meyer wrote:
>> Stefan Richter schrieb:
>>>   - Is the "WARNING: at arch/x86/mm/ioremap.c" still there?
>> No. I couldn't reproduce this warning, yet.
>>
>>>   - Can you reproduce it without the atheros driver?
>> Yes.
>>
>> See http://bugzilla.kernel.org/show_bug.cgi?id=10080.
> 
> Thanks.  Summary from today's bugzilla comments:
> No ioremap warning, but MMIO reads still give bogus values and let 
> ohci1394 fail.  ohci1394 still got the MMIO region 0x1'0000'0000 - 
> 0x1'0000'07ff, FWIW.  The length of the region is correct, but its 
> contents bogus.

Can an MMIO region reside above 0x1'0000'0000 on x86-32? ... Apparently 
yes, if CONFIG_RESOURCES_64BIT=y.

 From Thomas' dmesg:
http://bugzilla.kernel.org/attachment.cgi?id=15397

BIOS-provided physical RAM map:
  BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
  BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
  BIOS-e820: 00000000000ede00 - 0000000000100000 (reserved)
  BIOS-e820: 0000000000100000 - 000000007f0c8000 (usable)
  BIOS-e820: 000000007f0c8000 - 000000007f2c9000 (ACPI NVS)
  BIOS-e820: 000000007f2c9000 - 000000007feb9000 (ACPI data)
  BIOS-e820: 000000007feb9000 - 000000007feef000 (ACPI NVS)
  BIOS-e820: 000000007feef000 - 000000007ff00000 (ACPI data)
  BIOS-e820: 000000007ff00000 - 0000000080000000 (reserved)
  BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
  BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
  BIOS-e820: 00000000fed14000 - 00000000fed1a000 (reserved)
  BIOS-e820: 00000000fed1c000 - 00000000fed20000 (reserved)
  BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
  BIOS-e820: 00000000ffe00000 - 0000000100000000 (reserved)
1136MB HIGHMEM available.
896MB LOWMEM available.
...
ACPI: RSDP 000FE020, 0024 (r2 APPLE )
ACPI: XSDT 7FEFD120, 0074 (r1 APPLE   Apple00       55       1000013)
ACPI: FACP 7FEFB000, 00F4 (r3 APPLE   Apple00       55 Loki       5F)
ACPI: DSDT 7FEF0000, 48C0 (r1 APPLE  MacBookP    10001 INTL 20050309)

 From Thomas' .config:
http://bugzilla.kernel.org/attachment.cgi?id=15396
CONFIG_RESOURCES_64BIT=y

I have a Mac mini but run x86-64 on it.  However, I've got another 
i945GM based PC with x86-32 and three OHCI-1394 controllers in it.
I always had CONFIG_RESOURCES_64BIT switched off.  I shall try 
CONFIG_RESOURCES_64BIT=y on that PC.

Thomas, did you use CONFIG_RESOURCES_64BIT=y already under Linux 2.6.24?

All, is there anything special that drivers need to take care of for 
CONFIG_RESOURCES_64BIT=y?

We use resource_size_t ohci_base to request the MMIO region in 
drivers/ieee1394/ohci1394.c::ohci1394_pci_probe().  And we use struct 
ti_ohci::void __iomem *registers to store the MMIO base we get from 
ioremap, and readl(ohci->registers + (int)offset) and writel((u32)data, 
ohci->registers + (int)offset) to peek and poke in them; see 
drivers/ieee1394/ohci1394.h.
-- 
Stefan Richter
-=====-==--- --== =-==-
http://arcgraph.de/sr/
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Messages in current thread:

2.6.25-rc6-git6: Reported regressions from 2.6.24, Rafael J. Wysocki, (Fri Mar 21, 9:59 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Linus Torvalds, (Mon Mar 31, 2:21 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Mark Lord, (Mon Mar 31, 3:29 pm)

2.6.25-rc7/8: Another resume regression, Mark Lord, (Thu Apr 3, 3:06 pm)

Re: 2.6.25-rc7/8: Another resume regression, Mark Lord, (Fri Apr 4, 10:27 pm)

Re: 2.6.25-rc7/8: Another resume regression, Rafael J. Wysocki, (Mon Apr 7, 6:51 am)

Re: 2.6.25-rc7/8: Another resume regression, Mark Lord, (Mon Apr 7, 11:51 am)

Re: 2.6.25-rc7/8: Another resume regression, Rafael J. Wysocki, (Mon Apr 7, 1:40 pm)

Re: 2.6.25-rc7/8: Another resume regression, Mark Lord, (Tue Apr 8, 11:35 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Tino Keitel, (Mon Mar 31, 5:04 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Tino Keitel, (Mon Mar 31, 5:26 pm)

ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reporte..., Stefan Richter, (Sat Mar 22, 12:34 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Sat Mar 22, 1:24 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Sat Mar 22, 2:27 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Sat Mar 22, 3:02 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Sat Mar 22, 5:33 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Gleixner, (Sat Mar 22, 5:58 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Sat Mar 22, 7:01 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Mon Mar 24, 3:58 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Mon Mar 24, 4:50 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Mon Mar 24, 5:24 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Mon Mar 24, 5:47 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Tue Mar 25, 3:31 am)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Tue Mar 25, 12:50 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Tue Mar 25, 2:32 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Tue Mar 25, 4:11 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Tue Mar 25, 5:02 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Tue Mar 25, 4:29 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Tue Mar 25, 5:08 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Tue Mar 25, 5:47 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Tue Mar 25, 6:02 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ivan Kokshaysky, (Wed Mar 26, 6:14 am)

[patch] pci: revert "PCI: remove transparent bridge sizing", Ingo Molnar, (Wed Mar 26, 9:54 am)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Thomas Meyer, (Wed Mar 26, 1:45 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Gary Hade, (Wed Mar 26, 2:07 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 2:33 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Gary Hade, (Wed Mar 26, 4:30 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 4:46 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ivan Kokshaysky, (Wed Mar 26, 4:58 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 5:41 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ivan Kokshaysky, (Wed Mar 26, 7:29 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 7:45 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 7:43 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Thu Mar 27, 1:12 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ivan Kokshaysky, (Thu Mar 27, 6:18 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Gary Hade, (Fri Mar 28, 3:24 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Gary Hade, (Fri Mar 28, 4:46 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ivan Kokshaysky, (Sun Mar 30, 11:44 am)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Thu Mar 27, 6:34 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 5:57 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 6:31 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Alan Cox, (Wed Mar 26, 6:47 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 7:17 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ingo Molnar, (Wed Mar 26, 6:10 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 6:29 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 6:47 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 6:54 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 7:18 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ingo Molnar, (Wed Mar 26, 6:30 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Alan Cox, (Wed Mar 26, 6:07 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 6:27 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ingo Molnar, (Wed Mar 26, 5:29 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Wed Mar 26, 8:17 am)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ivan Kokshaysky, (Wed Mar 26, 7:12 am)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Tue Mar 25, 1:06 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Sat Mar 22, 7:50 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Sun Mar 23, 2:35 am)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Mon Mar 24, 3:34 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Mon Mar 24, 3:47 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Mon Mar 24, 4:17 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Mon Mar 24, 4:47 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Tue Mar 25, 11:39 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Wed Mar 26, 7:25 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., H. Peter Anvin, (Sat Mar 22, 5:59 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Yinghai Lu, (Sat Mar 22, 7:28 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., H. Peter Anvin, (Sat Mar 22, 7:31 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Yinghai Lu, (Sat Mar 22, 10:00 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., H. Peter Anvin, (Sat Mar 22, 10:39 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Yinghai Lu, (Sat Mar 22, 11:30 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Sat Mar 22, 6:27 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Tue Mar 25, 7:33 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Yinghai Lu, (Tue Mar 25, 8:03 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Tue Mar 25, 8:12 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Rafael J. Wysocki, (Sat Mar 22, 1:58 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Jeff Garzik, (Fri Mar 21, 10:52 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Ingo Molnar, (Sat Mar 22, 7:11 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Ray Lee, (Wed Mar 26, 12:30 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Romano Giannetti, (Thu Mar 27, 6:18 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Ray Lee, (Thu Mar 27, 10:43 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Rafael J. Wysocki, (Wed Mar 26, 6:11 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Adrian Bunk, (Wed Mar 26, 1:02 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Alan Cox, (Sun Mar 23, 8:57 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Heiko Carstens, (Sat Mar 22, 12:32 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Rafael J. Wysocki, (Sat Mar 22, 1:56 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Andrew Morton, (Sat Mar 22, 1:33 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Ingo Molnar, (Sat Mar 22, 7:15 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Rafael J. Wysocki, (Sat Mar 22, 1:53 pm)

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