ACPI regression on recent 7.0-STABLE: HPET stops working

[Oleg V. Nauman]

Quoting "Oleg V. Nauman" <oleg at opentransfer.com>:

> Quoting Jeremy Chadwick <koitsu at FreeBSD.org>:
>
>> On Sat, Jul 19, 2008 at 10:03:15AM +0300, Oleg V. Nauman wrote:
>>> It seems to be something was changed with ACPI support on 7.0-STABLE so
>>> my next system upgrade ended with ACPI HPET not working anymore on my
>>> ASUS A9Rp laptop.
>>>
>>> Here is the part of /var/log/dmesg.today dated July 13:
>>>
>>> FreeBSD 7.0-STABLE #65: Tue Jul  8 22:05:07 EEST 2008
>>>    root at rainhaven.theweb.org.ua:/usr/src/sys/i386/compile/oleg2
>>> [..]
>>> acpi0: <A M I OEMRSDT> on motherboard
>>> acpi0: Overriding SCI Interrupt from IRQ 9 to IRQ 21
>>> acpi0: [ITHREAD]
>>> acpi0: Power Button (fixed)
>>> acpi0: reservation of 0, a0000 (3) failed
>>> acpi0: reservation of 100000, 77f00000 (3) failed
>>> Timecounter "ACPI-safe" frequency 3579545 Hz quality 850
>>> acpi_timer0: <32-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
>>> acpi_ec0: <Embedded Controller: GPE 0x18> port 0x62,0x66 on acpi0
>>> acpi_hpet0: <High Precision Event Timer> iomem    
>>> 0xfed00000-0xfed003ff on acpi0
>>> Timecounter "HPET" frequency 14318180 Hz quality 900
>>>
>>> Here is the fresh dmesg output info:
>>>
>>> FreeBSD 7.0-STABLE #66: Tue Jul 15 22:11:27 EEST 2008
>>>    root at rainhaven.theweb.org.ua:/usr/src/sys/i386/compile/oleg2
>>> [..]
>>> acpi0: <A M I OEMRSDT> on motherboard
>>> acpi0: Overriding SCI Interrupt from IRQ 9 to IRQ 21
>>> acpi0: [ITHREAD]
>>> acpi0: Power Button (fixed)
>>> acpi0: reservation of 0, a0000 (3) failed
>>> acpi0: reservation of 100000, 77f00000 (3) failed
>>> Timecounter "ACPI-safe" frequency 3579545 Hz quality 850
>>> acpi_timer0: <32-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
>>> [..]
>>> acpi_hpet0: <High Precision Event Timer> iomem    
>>> 0xfed00000-0xfed003ff on acpi0
>>> device_attach: acpi_hpet0 attach returned 12
>>>
>>> And the part of actual sysctl kern.timecounter output:
>>>
>>> kern.timecounter.choice: TSC(800) ACPI-safe(850) i8254(0) dummy(-1000000)
>>> kern.timecounter.hardware: ACPI-safe
>>
>> Seems okay here:
>>
>> FreeBSD icarus.home.lan 7.0-STABLE FreeBSD 7.0-STABLE #0: Sat Jul   
>> 12  10:53:08 PDT 2008    
>> root at icarus.home.lan:/usr/obj/usr/src/sys/PDSMI_PLUS_amd64  amd64
>>
>> acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
>> acpi_hpet0: <High Precision Event Timer> iomem   
>> 0xfed00000-0xfed003ff on acpi0
>> Timecounter "i8254" frequency 1193182 Hz quality 0
>> Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
>> Timecounter "HPET" frequency 14318180 Hz quality 900
>> Timecounters tick every 1.000 msec
>>
>> kern.timecounter.choice: TSC(-100) HPET(900) ACPI-fast(1000)    
>> i8254(0) dummy(-1000000)
>> kern.timecounter.hardware: ACPI-fast
>>
>> You sure you haven't upgraded your BIOS or something and forgot to
>> re-enable HPET?
>
>  No it was not upgraded.. Have no option to enable/disable HPET through
> BIOS settings though

  I was unclear a bit or so. There are no ACPI related settings in my  
laptop's BIOS.

  Well.. Backout 1.243.2.3 revision of /usr/src/sys/dev/acpica/acpi.c  
(committed to RELENG_7 at July 10 by jhb) fixes this issue for me:

acpi_hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 900

kern.timecounter.choice: TSC(800) HPET(900) ACPI-safe(850) i8254(0)  
dummy(-1000000)
kern.timecounter.hardware: HPET

  Hopefully it helps to understand what is went wrong there.

Oleg






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