Re: pci dma addresses missing offset on sh7750

[Mike Frysinger <vapier@gentoo.org>]

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On Saturday 04 August 2012 22:01:58 Mike Frysinger wrote:
> i got back to looking at the landisk not working since 2.6.31.  linux-3.5
> boots up with better information, so we can get further in figuring out
> what went wrong.  for a recap, 99f95f117848088f2708b45c70be73152e78bb8a
> was the last rev i could boot.
> 
> with 2.6.30.9, i see these address ranges:
> Autoconfig PCI channel 0x8c3543e0
> Scanning bus 00, I/O 0xfe240000:0xfe280000, Mem 0xfd000000:0xfe000000
> 00:00.0 Class 0200: 10ec:8139 (rev 20)
>         I/O at 0xfe240000 [size=0x100]
>         Mem at 0xfd000000 [size=0x100]
> 00:01.0 Class 0180: 1191:0009 (rev 07)
>         I/O at 0xfe240100 [size=0x8]
>         I/O at 0xfe240108 [size=0x4]
>         I/O at 0xfe240110 [size=0x8]
>         I/O at 0xfe240118 [size=0x4]
>         I/O at 0xfe240120 [size=0x10]
> 00:02.0 Class 0c03: 1033:0035 (rev 43)
>         Mem at 0xfd001000 [size=0x1000]
> 00:02.1 Class 0c03: 1033:0035 (rev 43)
>         Mem at 0xfd002000 [size=0x1000]
> 00:02.2 Class 0c03: 1033:00e0 (rev 04)
>         Mem at 0xfd003000 [size=0x100]
> 
> but with 3.5, i see:
> PCI host bridge to bus 0000:00
> pci_bus 0000:00: root bus resource [io  0x1000-0x3fffff]
> pci_bus 0000:00: root bus resource [mem 0xfd000000-0xfdffffff]
> pci 0000:00:01.0: BAR 6: assigned [mem 0xfd000000-0xfd00ffff pref]
> pci 0000:00:02.0: BAR 0: assigned [mem 0xfd010000-0xfd010fff]
> pci 0000:00:02.1: BAR 0: assigned [mem 0xfd011000-0xfd011fff]
> pci 0000:00:00.0: BAR 0: assigned [io  0x1000-0x10ff]
> pci 0000:00:00.0: BAR 1: assigned [mem 0xfd012000-0xfd0120ff]
> pci 0000:00:02.2: BAR 0: assigned [mem 0xfd012100-0xfd0121ff]
> pci 0000:00:01.0: BAR 4: assigned [io  0x1400-0x140f]
> pci 0000:00:01.0: BAR 0: assigned [io  0x1410-0x1417]
> pci 0000:00:01.0: BAR 2: assigned [io  0x1418-0x141f]
> pci 0000:00:01.0: BAR 1: assigned [io  0x1420-0x1423]
> pci 0000:00:01.0: BAR 3: assigned [io  0x1424-0x1427]
> 
> notice how the dma ranges are completely in the wrong region.  any quick
> ideas where to fix this ? :)

hrm, reverting this got me further:

commit e3a4317e1d9970c56ba19d29393e4289809a1aa5
Author: Magnus Damm <damm@opensource.se>
Date:   Thu Apr 22 06:21:10 2010 +0000

    sh: sh7751 pci controller io port fix

maybe the sh7751 pci/dma logic is missing some offset adjustment that the 
sh7780 core has ?

btw, the display above isn't just informational ... i get an oops because the 
code tries to access memory in the 0x1400 range.
-mike

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