linux-kernel - [RFC 0/7] Convert the Intel iommu driver to the dma-ops api

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Message-Id: <20190504132327.27041-1-tmurphy@arista.com>
Date:   Sat,  4 May 2019 14:23:16 +0100
From:   Tom Murphy <tmurphy@...sta.com>
To:     iommu@...ts.linux-foundation.org
Cc:     murphyt7@....ie, Tom Murphy <tmurphy@...sta.com>,
        Joerg Roedel <joro@...tes.org>,
        Will Deacon <will.deacon@....com>,
        Robin Murphy <robin.murphy@....com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Clark <robdclark@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Gerald Schaefer <gerald.schaefer@...ibm.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-tegra@...r.kernel.org, kvm@...r.kernel.org
Subject: [RFC 0/7] Convert the Intel iommu driver to the dma-ops api

Convert the intel iommu driver to the dma-ops api so that we can remove a bunch of repeated code.

This patchset depends on the "iommu/vt-d: Delegate DMA domain to generic iommu" and
"iommu/amd: Convert the AMD iommu driver to the dma-iommu api" patch sets which haven't
yet merged so this is just a RFC to get some feedback before I do more testing.

Tom Murphy (7):
  iommu/vt-d: Set the dma_ops per device so we can remove the
    iommu_no_mapping code
  iommu/vt-d: Remove iova handling code from non-dma ops path
  iommu: improve iommu iotlb flushing
  iommu/dma-iommu: Handle freelists in the dma-iommu api path
  iommu/dma-iommu: add wrapper for iommu_dma_free_cpu_cached_iovas
  iommu/vt-d: convert the intel iommu driver to the dma-iommu ops api
  iommu/vt-d: Always set DMA_PTE_READ if the iommu doens't support zero
    length reads

 drivers/iommu/Kconfig           |   1 +
 drivers/iommu/amd_iommu.c       |  14 +-
 drivers/iommu/arm-smmu-v3.c     |   3 +-
 drivers/iommu/arm-smmu.c        |   2 +-
 drivers/iommu/dma-iommu.c       |  48 ++-
 drivers/iommu/exynos-iommu.c    |   3 +-
 drivers/iommu/intel-iommu.c     | 605 +++++---------------------------
 drivers/iommu/iommu.c           |  21 +-
 drivers/iommu/ipmmu-vmsa.c      |   2 +-
 drivers/iommu/msm_iommu.c       |   2 +-
 drivers/iommu/mtk_iommu.c       |   3 +-
 drivers/iommu/mtk_iommu_v1.c    |   3 +-
 drivers/iommu/omap-iommu.c      |   2 +-
 drivers/iommu/qcom_iommu.c      |   2 +-
 drivers/iommu/rockchip-iommu.c  |   2 +-
 drivers/iommu/s390-iommu.c      |   3 +-
 drivers/iommu/tegra-gart.c      |   2 +-
 drivers/iommu/tegra-smmu.c      |   2 +-
 drivers/vfio/vfio_iommu_type1.c |   3 +-
 include/linux/dma-iommu.h       |   3 +
 include/linux/intel-iommu.h     |   1 -
 include/linux/iommu.h           |  24 +-
 22 files changed, 175 insertions(+), 576 deletions(-)

-- 
2.17.1