Re: cleanup unused or almost unused IOMMU APIs and the FSL PAMU driver

[Li Yang <leoyang.li@nxp.com>]

On Mon, Mar 1, 2021 at 2:44 AM Christoph Hellwig <hch@lst.de> wrote:
>
> Hi all,
>
> there are a bunch of IOMMU APIs that are entirely unused, or only used as
> a private communication channel between the FSL PAMU driver and it's only
> consumer, the qbman portal driver.
>
> So this series drops a huge chunk of entirely unused FSL PAMU
> functionality, then drops all kinds of unused IOMMU APIs, and then
> replaces what is left of the iommu_attrs with properly typed, smaller
> and easier to use specific APIs.

It looks like the unused APIs were added for functionality that were
never completed later on.  So

Acked-by: Li Yang <leoyang.li@nxp.com>

>
> Diffstat:
>  arch/powerpc/include/asm/fsl_pamu_stash.h   |   12
>  drivers/gpu/drm/msm/adreno/adreno_gpu.c     |    2
>  drivers/iommu/amd/iommu.c                   |   23
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c |   85 ---
>  drivers/iommu/arm/arm-smmu/arm-smmu.c       |  122 +---
>  drivers/iommu/dma-iommu.c                   |    8
>  drivers/iommu/fsl_pamu.c                    |  264 ----------
>  drivers/iommu/fsl_pamu.h                    |   10
>  drivers/iommu/fsl_pamu_domain.c             |  694 ++--------------------------
>  drivers/iommu/fsl_pamu_domain.h             |   46 -
>  drivers/iommu/intel/iommu.c                 |   55 --
>  drivers/iommu/iommu.c                       |   75 ---
>  drivers/soc/fsl/qbman/qman_portal.c         |   56 --
>  drivers/vfio/vfio_iommu_type1.c             |   31 -
>  drivers/vhost/vdpa.c                        |   10
>  include/linux/iommu.h                       |   81 ---
>  16 files changed, 214 insertions(+), 1360 deletions(-)