Re: HPET regression in 2.6.26 versus 2.6.25 -- found another user with the same regression

["Yinghai Lu" <yhlu.kernel@gmail.com>]

On Sat, Aug 23, 2008 at 12:40 PM, Rufus & Azrael
<rufus-azrael@numericable.fr> wrote:
> Yinghai Lu wrote:
>>
>> On Sat, Aug 23, 2008 at 11:26 AM, Rufus&  Azrael
>> <rufus-azrael@numericable.fr>  wrote:
>>
>>>>
>>>> On Sat, Aug 23, 2008 at 4:58 AM, David Witbrodt<dawitbro@sbcglobal.net>
>>>>  wrote:
>>>>
>>>>>
>>>>>
>>>>>>
>>>>>>  please send out after booting with hpet=disable
>>>>>>  lspci -tv
>>>>>>  lspci -vvxxx
>>>>>>
>>>>>
>>>>>  Info attached:
>>>>>
>>>>
>>>> 00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 13)
>>>>        Subsystem: Elitegroup Computer Systems Device 2621
>>>>        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-
>>>>        Region 0: I/O ports at fa00 [size=16]
>>>>        Region 1: Memory at 80000000 (32-bit, non-prefetchable) [size=1K]
>>>>        Capabilities: [b0] HyperTransport: MSI Mapping Enable- Fixed+
>>>>        Kernel driver in use: piix4_smbus
>>>> 00: 02 10 85 43 03 04 30 02 13 00 05 0c 00 00 80 00
>>>> 10: 01 fa 00 00 00 00 00 80 00 00 00 00 00 00 00 00
>>>> 20: 00 00 00 00 00 00 00 00 00 00 00 00 19 10 21 26
>>>> 30: 00 00 00 00 b0 00 00 00 00 00 00 00 00 00 00 00
>>>> 40: d4 3b 00 05 00 00 00 00 0f ff 00 00 00 00 00 00
>>>> 50: f0 01 f0 0e f0 0f f0 07 11 0b f0 0f 00 00 00 00
>>>> 60: 01 00 24 00 bf fd de 8f 3f 90 00 00 20 00 00 00
>>>> 70: 00 01 00 00 08 00 c0 fe ff 6e 00 00 00 00 f0 0f
>>>> 80: f0 0a f0 0f 00 00 00 00 00 00 00 00 8c 00 00 80
>>>> 90: 01 fa 00 00 fa de ff 00 00 00 00 00 00 00 00 00
>>>> a0: 00 00 ff ff ff ff f0 08 ff fd 12 02 16 7b 20 00
>>>> b0: 08 00 02 a8 00 00 00 00 00 00 00 00 f0 0f 08 1a
>>>> c0: ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00
>>>> d0: 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
>>>> e0: 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>>>> f0: d8 0c 00 00 00 00 44 00 00 00 00 00 aa 00 10 01
>>>> it seems kernel update BAR1 from 0xfed00000 to 0x80000000 after it can
>>>> not give 0xfed00000 to that device.
>>>> please try attached patch, and send out lspci -vvxxxx again.
>>>> YH
>>>> [PATCH] x86: protect hpet in BAR for one ATI chipset
>>>>
>>>> so avoid kernel don't allocate nre resource for it because it can not
>>>> allocate the old
>>>> address from BIOS.
>>>>
>>>> the same way like some IO APIC address in BAR handling
>>>>
>>>> Signed-off-by: Yinghai Lu<yhlu.kenrel@gmail.com>
>>>>
>>>> ---
>>>>  drivers/pci/quirks.c |   16 ++++++++++++++++
>>>>  1 file changed, 16 insertions(+)
>>>> Index: linux-2.6/drivers/pci/quirks.c
>>>> ===================================================================
>>>> --- linux-2.6.orig/drivers/pci/quirks.c
>>>> +++ linux-2.6/drivers/pci/quirks.c
>>>> @@ -1918,6 +1918,22 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_B
>>>>                         PCI_DEVICE_ID_NX2_5709S,
>>>>                         quirk_brcm_570x_limit_vpd);
>>>>
>>>> +static void __init quirk_hpet_in_bar(struct pci_dev *pdev)
>>>> +{
>>>> +       int i;
>>>> +       unsigned int base, size;
>>>> +
>>>> +       /* the BAR1 is the location of the HPET...we must
>>>> +        * not touch this, so forcibly insert it into the resource tree
>>>> */
>>>> +       base = pci_resource_start(pdev, 1);
>>>> +       size = pci_resource_len(pdev, 1);
>>>> +       if (base&&   size) {
>>>> +               insert_resource(&iomem_resource,&pdev->resource[1]);
>>>> +               dev_info(&dev->dev, "HPET at %04x-%04x\n", name, base,
>>>> base + size - 1);
>>>> +       }
>>>> +}
>>>> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, 0x3485, quirk_hpet_in_bar);
>>>> +
>>>>  #ifdef CONFIG_PCI_MSI
>>>>  /* Some chipsets do not support MSI. We cannot easily rely on setting
>>>>   * PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually
>>>>
>>>
>>> Hi Yinghai,
>>>
>>>
>>> Your patch seems to be broken, see :
>>>
>>>
>>>>
>>>>  CC      drivers/pci/quirks.o
>>>> drivers/pci/quirks.c: In function 'quirk_hpet_in_bar':
>>>> drivers/pci/quirks.c:1804: erreur: 'dev' undeclared (first use in this
>>>> function)
>>>> drivers/pci/quirks.c:1804: erreur: (Each undeclared identifier is
>>>> reported
>>>> only once
>>>> drivers/pci/quirks.c:1804: erreur: for each function it appears in.)
>>>> drivers/pci/quirks.c:1804: erreur: 'name' undeclared (first use in this
>>>> function)
>>>> drivers/pci/quirks.c:1804: attention : trop d'arguments pour le format
>>>> drivers/pci/quirks.c:1795: attention : unused variable 'i'
>>>> make[2]: *** [drivers/pci/quirks.o] Erreur 1
>>>>
>>
>> please check v2.
>>
>> YH
>>
>
> Thanks Yinghai,
>
> Your patch applied, I attach lspci -vvxxxx.
>
> Regards.
>
>
> 00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 14)
>        Subsystem: Micro-Star International Co., Ltd. Device 7327
>        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-
>        Region 0: I/O ports at 0b00 [size=16]
>        Capabilities: [b0] HyperTransport: MSI Mapping Enable- Fixed+
>        Kernel driver in use: piix4_smbus
> 00: 02 10 85 43 01 04 30 02 14 00 05 0c 00 00 80 00
> 10: 01 0b 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 62 14 27 73
> 30: 00 00 00 00 b0 00 00 00 00 00 00 00 00 00 00 00
> 40: d4 2b 00 05 00 00 00 00 0f ff 00 00 00 00 00 00
> 50: 10 01 00 00 00 00 80 08 11 0b f0 0f 00 00 00 00
> 60: 01 00 24 00 bf fd 9e 83 3f 90 00 00 20 00 00 00
> 70: 00 01 00 00 08 00 c0 fe ff 2e 00 00 00 00 f0 0f
> 80: f4 0a f0 0f 00 00 00 00 00 00 00 00 8c 00 00 80
> 90: 01 0b 00 00 3b de ff 00 00 00 00 00 00 00 00 00
> a0: 00 00 ff ff ff ff f0 08 02 f0 02 00 16 79 00 18
> b0: 08 00 02 a8 00 00 00 00 00 00 00 00 f0 0f 08 1a
> c0: ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00
> d0: 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
> e0: 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> f0: d8 0c 00 00 00 00 44 00 00 00 00 00 aa 00 10 01

bios didn't set HPET in BAR1?

YH