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Date:	Sun, 9 Feb 2014 01:02:03 +0100
From:	Daniel Vetter <daniel.vetter@...ll.ch>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Ville Syrjälä <ville.syrjala@...ux.intel.com>,
	Yinghai Lu <yinghai@...nel.org>,
	David Airlie <airlied@...ux.ie>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>
Subject: Re: agp/intel: can't ioremap flush page - no chipset flushing

On Sat, Feb 8, 2014 at 9:22 PM, Paul Bolle <pebolle@...cali.nl> wrote:
> Daniel Vetter schreef op za 08-02-2014 om 20:59 [+0100]:
>> Hm, if this is really a regression between 3.13 and 3.14-rc1 then I
>> don't see any quick candidates - relevant functions in intel-gtt.c
>> seem unchanged.
>>
>> So probably a bisect is what we need here. Note that this could also
>> be due to resource handling changes in the driver/pci core, so you
>> can't restrict the bisect really.
>
> The last bisect on this machine took over 20 builds to pinpoint the
> offending commit. So that's bad news ...

Somehow we can't allocate the flush page resource any more, but I
don't have any idea what. There's nothing occupying the old spot (the
usual reason why resource management goes boom), so dunno why this
doesn't work any more. I think bisecting is the most fruitful avenue
here.
-Daniel


>
>>  But before going down this route it
>> would be worth to check out the resource allocations of both kernels.
>> Can you please attach /proc/iomem for both 3.13 and 3.14-rc1
>
> The diff between /proc/iomem on v3.13.2 and v3.14-rc1 is:
> --- iomem-3.13.2        2014-02-08 21:14:30.214030591 +0100
> +++ iomem-3.14-rc1      2014-02-08 21:07:22.041189158 +0100
> @@ -11,16 +11,13 @@
>    000e0000-000effff : Extension ROM
>    000f0000-000fffff : System ROM
>  00100000-7f6dffff : System RAM
> -  00400000-009af63a : Kernel code
> -  009af63b-00c932ff : Kernel data
> -  00d4f000-00e4dfff : Kernel bss
> +  00400000-009c57bf : Kernel code
> +  009c57c0-00cb6aff : Kernel data
> +  00d78000-00e74fff : Kernel bss
>  7f6e0000-7f6f4fff : ACPI Tables
>  7f6f5000-7f6fffff : ACPI Non-volatile Storage
>  7f700000-7fffffff : reserved
>    7f800000-7fffffff : Graphics Stolen Memory
> -80000000-801fffff : PCI Bus 0000:02
> -80200000-8027ffff : 0000:00:02.1
> -80280000-80280fff : Intel Flush Page
>  a0000000-a003ffff : 0000:00:02.0
>  a0040000-a00403ff : 0000:00:1d.7
>    a0040000-a00403ff : ehci_hcd
>
> /proc/iomem for v3.13.2:
> 00000000-00000fff : reserved
> 00001000-0009efff : System RAM
> 0009f000-0009ffff : reserved
> 000a0000-000bffff : Video RAM area
> 000c0000-000c7fff : Video ROM
> 000c8000-000cbfff : pnp 00:00
> 000cf800-000d3fff : reserved
>   000cf800-000d0dff : Adapter ROM
>   000d1000-000d1fff : Adapter ROM
> 000dc000-000fffff : reserved
>   000e0000-000effff : Extension ROM
>   000f0000-000fffff : System ROM
> 00100000-7f6dffff : System RAM
>   00400000-009af63a : Kernel code
>   009af63b-00c932ff : Kernel data
>   00d4f000-00e4dfff : Kernel bss
> 7f6e0000-7f6f4fff : ACPI Tables
> 7f6f5000-7f6fffff : ACPI Non-volatile Storage
> 7f700000-7fffffff : reserved
>   7f800000-7fffffff : Graphics Stolen Memory
> 80000000-801fffff : PCI Bus 0000:02
> 80200000-8027ffff : 0000:00:02.1
> 80280000-80280fff : Intel Flush Page
> a0000000-a003ffff : 0000:00:02.0
> a0040000-a00403ff : 0000:00:1d.7
>   a0040000-a00403ff : ehci_hcd
> a0040400-a00404ff : 0000:00:1e.2
>   a0040400-a00404ff : Intel ICH6
> a0040800-a00409ff : 0000:00:1e.2
>   a0040800-a00409ff : Intel ICH6
> a0080000-a00fffff : 0000:00:02.0
> a0100000-a01fffff : PCI Bus 0000:02
>   a0100000-a010ffff : 0000:02:00.0
>     a0100000-a010ffff : tg3
> a0200000-afffffff : PCI Bus 0000:04
>   a0200000-a0200fff : 0000:04:00.0
>     a0200000-a0200fff : yenta_socket
>   a0201000-a02010ff : 0000:04:00.1
>     a0201000-a02010ff : mmc0
>   a0202000-a0202fff : 0000:04:02.0
>     a0202000-a0202fff : ipw2200
>   a4000000-a7ffffff : PCI CardBus 0000:05
> c0000000-cfffffff : 0000:00:02.0
> d0000000-d7ffffff : PCI Bus 0000:04
>   d0000000-d3ffffff : PCI CardBus 0000:05
> e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff]
>   e0000000-efffffff : reserved
>     e0000000-efffffff : pnp 00:01
> f0008000-f000bfff : reserved
>   f0008000-f000bfff : pnp 00:01
>     f000b410-f000b414 : iTCO_wdt
>       f000b410-f000b414 : iTCO_wdt
> fec00000-fec0ffff : reserved
>   fec00000-fec003ff : IOAPIC 0
> fed14000-fed19fff : reserved
>   fed14000-fed17fff : pnp 00:01
>   fed18000-fed18fff : pnp 00:01
>   fed19000-fed19fff : pnp 00:01
> fed20000-fed8ffff : reserved
> fee00000-fee00fff : Local APIC
>   fee00000-fee00fff : reserved
> ff000000-ffffffff : reserved
>
> /proc/iomem for v3.14-rc1:
> 00000000-00000fff : reserved
> 00001000-0009efff : System RAM
> 0009f000-0009ffff : reserved
> 000a0000-000bffff : Video RAM area
> 000c0000-000c7fff : Video ROM
> 000c8000-000cbfff : pnp 00:00
> 000cf800-000d3fff : reserved
>   000cf800-000d0dff : Adapter ROM
>   000d1000-000d1fff : Adapter ROM
> 000dc000-000fffff : reserved
>   000e0000-000effff : Extension ROM
>   000f0000-000fffff : System ROM
> 00100000-7f6dffff : System RAM
>   00400000-009c57bf : Kernel code
>   009c57c0-00cb6aff : Kernel data
>   00d78000-00e74fff : Kernel bss
> 7f6e0000-7f6f4fff : ACPI Tables
> 7f6f5000-7f6fffff : ACPI Non-volatile Storage
> 7f700000-7fffffff : reserved
>   7f800000-7fffffff : Graphics Stolen Memory
> a0000000-a003ffff : 0000:00:02.0
> a0040000-a00403ff : 0000:00:1d.7
>   a0040000-a00403ff : ehci_hcd
> a0040400-a00404ff : 0000:00:1e.2
>   a0040400-a00404ff : Intel ICH6
> a0040800-a00409ff : 0000:00:1e.2
>   a0040800-a00409ff : Intel ICH6
> a0080000-a00fffff : 0000:00:02.0
> a0100000-a01fffff : PCI Bus 0000:02
>   a0100000-a010ffff : 0000:02:00.0
>     a0100000-a010ffff : tg3
> a0200000-afffffff : PCI Bus 0000:04
>   a0200000-a0200fff : 0000:04:00.0
>     a0200000-a0200fff : yenta_socket
>   a0201000-a02010ff : 0000:04:00.1
>     a0201000-a02010ff : mmc0
>   a0202000-a0202fff : 0000:04:02.0
>     a0202000-a0202fff : ipw2200
>   a4000000-a7ffffff : PCI CardBus 0000:05
> c0000000-cfffffff : 0000:00:02.0
> d0000000-d7ffffff : PCI Bus 0000:04
>   d0000000-d3ffffff : PCI CardBus 0000:05
> e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff]
>   e0000000-efffffff : reserved
>     e0000000-efffffff : pnp 00:01
> f0008000-f000bfff : reserved
>   f0008000-f000bfff : pnp 00:01
>     f000b410-f000b414 : iTCO_wdt
>       f000b410-f000b414 : iTCO_wdt
> fec00000-fec0ffff : reserved
>   fec00000-fec003ff : IOAPIC 0
> fed14000-fed19fff : reserved
>   fed14000-fed17fff : pnp 00:01
>   fed18000-fed18fff : pnp 00:01
>   fed19000-fed19fff : pnp 00:01
> fed20000-fed8ffff : reserved
> fee00000-fee00fff : Local APIC
>   fee00000-fee00fff : reserved
> ff000000-ffffffff : reserved
>
> Thanks,
>
>
> Paul Bolle
>



-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
--
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