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Date: Sat, 23 Aug 2008 22:15:53 +0200
From: Rufus & Azrael <rufus-azrael@...ericable.fr>
To: Yinghai Lu <yhlu.kernel@...il.com>
CC: Linux-kernel Mailing List <linux-kernel@...r.kernel.org>,
Yinghai Lu <yhlu.kenrel@...il.com>,
Ingo Molnar <mingo@...e.hu>,
David Witbrodt <dawitbro@...global.net>
Subject: Re: HPET regression in 2.6.26 versus 2.6.25 -- found another user
with the same regression
Yinghai Lu wrote:
> On Sat, Aug 23, 2008 at 12:40 PM, Rufus& Azrael
> <rufus-azrael@...ericable.fr> wrote:
>
>> Yinghai Lu wrote:
>>
>>> On Sat, Aug 23, 2008 at 11:26 AM, Rufus& Azrael
>>> <rufus-azrael@...ericable.fr> wrote:
>>>
>>>
>>>>> On Sat, Aug 23, 2008 at 4:58 AM, David Witbrodt<dawitbro@...global.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@...il.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
>
>
Yinghai,
How do I check this ?
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