Re: [PATCH kernel v4 0/4] powerpc/ioda2: Yet another attempt to allow DMA masks between 32 and 59

[Alexey Kardashevskiy]

Argh. This was meant for the linuxppc list, will repost, please ignore this.


On 12/07/2019 19:29, Alexey Kardashevskiy wrote:
> This is an attempt to allow DMA masks between 32..59 which are not large
> enough to use either a PHB3 bypass mode or a sketchy bypass. Depending
> on the max order, up to 40 is usually available.
>
>
> This is based on sha1
> a2b6f26c264e Christophe Leroy "powerpc/module64: Use symbolic instructions names.".
>
> Please comment. Thanks.
>
>
>
> Alexey Kardashevskiy (4):
>    powerpc/powernv/ioda: Fix race in TCE level allocation
>    powerpc/iommu: Allow bypass-only for DMA
>    powerpc/powernv/ioda2: Allocate TCE table levels on demand for default
>      DMA window
>    powerpc/powernv/ioda2: Create bigger default window with 64k IOMMU
>      pages
>
>   arch/powerpc/include/asm/iommu.h              |  8 +-
>   arch/powerpc/platforms/powernv/pci.h          |  2 +-
>   arch/powerpc/kernel/dma-iommu.c               | 11 ++-
>   arch/powerpc/kernel/iommu.c                   | 74 +++++++++++++------
>   arch/powerpc/platforms/powernv/pci-ioda-tce.c | 38 ++++++----
>   arch/powerpc/platforms/powernv/pci-ioda.c     | 40 ++++++++--
>   6 files changed, 121 insertions(+), 52 deletions(-)

--
Alexey