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Message-ID: <CADRPPNTSzuuqW97_vd3h5cpHe7gOLyw3zCaqapb8YVqPF-rOfA@mail.gmail.com>
Date: Fri, 5 Mar 2021 18:03:45 -0600
From: Li Yang <leoyang.li@....com>
To: Christoph Hellwig <hch@....de>
Cc: Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
freedreno@...ts.freedesktop.org, kvm@...r.kernel.org,
linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
dri-devel@...ts.freedesktop.org,
virtualization@...ts.linux-foundation.org,
Linux IOMMU <iommu@...ts.linux-foundation.org>,
Netdev <netdev@...r.kernel.org>,
linux-arm-msm <linux-arm-msm@...r.kernel.org>,
David Woodhouse <dwmw2@...radead.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@...ts.infradead.org>,
Lu Baolu <baolu.lu@...ux.intel.com>
Subject: Re: cleanup unused or almost unused IOMMU APIs and the FSL PAMU driver
On Mon, Mar 1, 2021 at 2:44 AM Christoph Hellwig <hch@....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@....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(-)
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