[PATCH kernel v3 0/3] powerpc/ioda2: Yet another attempt to allow DMA masks between 32 and 59

[Oliver]

On Thu, Jun 6, 2019 at 5:17 PM Alistair Popple <alistair at popple.id.au> wrote:
>
> I have been hitting EEH address errors testing this with some network
> cards which map/unmap DMA addresses more frequently. For example:
>
> PHB4 PHB#5 Diag-data (Version: 1)
> brdgCtl:    00000002
> RootSts:    00060020 00402000 a0220008 00100107 00000800
> PhbSts:     0000001c00000000 0000001c00000000
> Lem:        0000000100000080 0000000000000000 0000000000000080
> PhbErr:     0000028000000000 0000020000000000 2148000098000240 a008400000000000
> RxeTceErr:  2000000000000000 2000000000000000 c000000000000000 0000000000000000
> PblErr:     0000000000020000 0000000000020000 0000000000000000 0000000000000000
> RegbErr:    0000004000000000 0000004000000000 61000c4800000000 0000000000000000
> PE[000] A/B: 8300b03800000000 8000000000000000
>
> Interestingly the PE[000] A/B data is the same across different cards
> and drivers.

TCE page fault due to permissions so odds are the DMA address was unmapped.

What cards did you get this with? I tried with one of the common
BCM5719 NICs and generated network traffic by using rsync to copy a
linux git tree to the system and it worked fine.