From: Marek Szyprowski <m.szyprowski@samsung.com> To: Linux IOMMU <iommu@lists.linux-foundation.org>, linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: Marek Szyprowski <m.szyprowski@samsung.com>, Robin Murphy <robin.murphy@arm.com>, Joerg Roedel <joro@8bytes.org>, Christoph Hellwig <hch@lst.de>, Sylwester Nawrocki <snawrocki@kernel.org>, Krzysztof Kozlowski <krzk@kernel.org>, Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>, Tomasz Figa <tfiga@chromium.org>, linux-kernel@vger.kernel.org Subject: [PATCH 0/8] IOMMU-DMA - support old allocation algorithm used on ARM Date: Fri, 25 Sep 2020 16:12:10 +0200 [thread overview] Message-ID: <20200925141218.13550-1-m.szyprowski@samsung.com> (raw) In-Reply-To: CGME20200925141230eucas1p1b4bb8a7e17a887c6ca6a7b8caa7cf9c7@eucas1p1.samsung.com Hi, This patchset is a continuation of the planned rework of the ARM IOMMU/DMA-mapping code proposed by Robin Murphy in [1]. However, there are drivers (for example S5P-MFC and Exynos4-IS) which depend on the way the old ARM IOMMU/DMA-mapping glue code worked (it used 'first-fit' IOVA allocation algorithm), so before switching ARM to the generic code, such drivers have to be updated. This patchset provides the needed extensions to the generic IOMMU-DMA framework to enable support for the drivers that relied on the old ARM IOMMU/DMA-mapping behavior. This patchset is based on the idea proposed by Robin Murphy in [2] after the discussion of the workaround implemented directly in the mentioned drivers [3]. Here is a git branch with this patchset and [1] patches applied on top of linux next-20200925: https://github.com/mszyprow/linux/tree/v5.9-next-20200925-arm-dma-iommu-low-address Best regards, Marek Szyprowski References: [1] https://lore.kernel.org/lkml/cover.1597931875.git.robin.murphy@arm.com/ [2] https://lore.kernel.org/linux-iommu/bff57cbe-2247-05e1-9059-d9c66d64c407@arm.com/ [3] https://lore.kernel.org/linux-samsung-soc/20200918144833.14618-1-m.szyprowski@samsung.com/T/ Patch summary: Marek Szyprowski (8): dma-mapping: add DMA_ATTR_LOW_ADDRESS attribute iommu: iova: properly handle 0 as a valid IOVA address iommu: iova: add support for 'first-fit' algorithm iommu: dma-iommu: refactor iommu_dma_alloc_iova() iommu: dma-iommu: add support for DMA_ATTR_LOW_ADDRESS media: platform: exynos4-is: remove all references to physicall addresses media: platform: exynos4-is: use DMA_ATTR_LOW_ADDRESS media: platform: s5p-mfc: use DMA_ATTR_LOW_ADDRESS drivers/iommu/dma-iommu.c | 79 ++++++++++++----- drivers/iommu/intel/iommu.c | 12 +-- drivers/iommu/iova.c | 88 ++++++++++++++++++- .../media/platform/exynos4-is/fimc-capture.c | 6 +- drivers/media/platform/exynos4-is/fimc-core.c | 28 +++--- drivers/media/platform/exynos4-is/fimc-core.h | 18 ++-- drivers/media/platform/exynos4-is/fimc-is.c | 23 ++--- drivers/media/platform/exynos4-is/fimc-is.h | 6 +- .../media/platform/exynos4-is/fimc-lite-reg.c | 4 +- drivers/media/platform/exynos4-is/fimc-lite.c | 2 +- drivers/media/platform/exynos4-is/fimc-lite.h | 4 +- drivers/media/platform/exynos4-is/fimc-m2m.c | 8 +- drivers/media/platform/exynos4-is/fimc-reg.c | 18 ++-- drivers/media/platform/exynos4-is/fimc-reg.h | 4 +- drivers/media/platform/s5p-mfc/s5p_mfc.c | 8 +- include/linux/dma-mapping.h | 6 ++ include/linux/iova.h | 4 + 17 files changed, 221 insertions(+), 97 deletions(-) -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Marek Szyprowski <m.szyprowski@samsung.com> To: Linux IOMMU <iommu@lists.linux-foundation.org>, linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>, Sylwester Nawrocki <snawrocki@kernel.org>, linux-kernel@vger.kernel.org, Krzysztof Kozlowski <krzk@kernel.org>, Robin Murphy <robin.murphy@arm.com>, Christoph Hellwig <hch@lst.de> Subject: [PATCH 0/8] IOMMU-DMA - support old allocation algorithm used on ARM Date: Fri, 25 Sep 2020 16:12:10 +0200 [thread overview] Message-ID: <20200925141218.13550-1-m.szyprowski@samsung.com> (raw) In-Reply-To: CGME20200925141230eucas1p1b4bb8a7e17a887c6ca6a7b8caa7cf9c7@eucas1p1.samsung.com Hi, This patchset is a continuation of the planned rework of the ARM IOMMU/DMA-mapping code proposed by Robin Murphy in [1]. However, there are drivers (for example S5P-MFC and Exynos4-IS) which depend on the way the old ARM IOMMU/DMA-mapping glue code worked (it used 'first-fit' IOVA allocation algorithm), so before switching ARM to the generic code, such drivers have to be updated. This patchset provides the needed extensions to the generic IOMMU-DMA framework to enable support for the drivers that relied on the old ARM IOMMU/DMA-mapping behavior. This patchset is based on the idea proposed by Robin Murphy in [2] after the discussion of the workaround implemented directly in the mentioned drivers [3]. Here is a git branch with this patchset and [1] patches applied on top of linux next-20200925: https://github.com/mszyprow/linux/tree/v5.9-next-20200925-arm-dma-iommu-low-address Best regards, Marek Szyprowski References: [1] https://lore.kernel.org/lkml/cover.1597931875.git.robin.murphy@arm.com/ [2] https://lore.kernel.org/linux-iommu/bff57cbe-2247-05e1-9059-d9c66d64c407@arm.com/ [3] https://lore.kernel.org/linux-samsung-soc/20200918144833.14618-1-m.szyprowski@samsung.com/T/ Patch summary: Marek Szyprowski (8): dma-mapping: add DMA_ATTR_LOW_ADDRESS attribute iommu: iova: properly handle 0 as a valid IOVA address iommu: iova: add support for 'first-fit' algorithm iommu: dma-iommu: refactor iommu_dma_alloc_iova() iommu: dma-iommu: add support for DMA_ATTR_LOW_ADDRESS media: platform: exynos4-is: remove all references to physicall addresses media: platform: exynos4-is: use DMA_ATTR_LOW_ADDRESS media: platform: s5p-mfc: use DMA_ATTR_LOW_ADDRESS drivers/iommu/dma-iommu.c | 79 ++++++++++++----- drivers/iommu/intel/iommu.c | 12 +-- drivers/iommu/iova.c | 88 ++++++++++++++++++- .../media/platform/exynos4-is/fimc-capture.c | 6 +- drivers/media/platform/exynos4-is/fimc-core.c | 28 +++--- drivers/media/platform/exynos4-is/fimc-core.h | 18 ++-- drivers/media/platform/exynos4-is/fimc-is.c | 23 ++--- drivers/media/platform/exynos4-is/fimc-is.h | 6 +- .../media/platform/exynos4-is/fimc-lite-reg.c | 4 +- drivers/media/platform/exynos4-is/fimc-lite.c | 2 +- drivers/media/platform/exynos4-is/fimc-lite.h | 4 +- drivers/media/platform/exynos4-is/fimc-m2m.c | 8 +- drivers/media/platform/exynos4-is/fimc-reg.c | 18 ++-- drivers/media/platform/exynos4-is/fimc-reg.h | 4 +- drivers/media/platform/s5p-mfc/s5p_mfc.c | 8 +- include/linux/dma-mapping.h | 6 ++ include/linux/iova.h | 4 + 17 files changed, 221 insertions(+), 97 deletions(-) -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next parent reply other threads:[~2020-09-25 14:12 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <CGME20200925141230eucas1p1b4bb8a7e17a887c6ca6a7b8caa7cf9c7@eucas1p1.samsung.com> 2020-09-25 14:12 ` Marek Szyprowski [this message] 2020-09-25 14:12 ` [PATCH 0/8] IOMMU-DMA - support old allocation algorithm used on ARM Marek Szyprowski [not found] ` <CGME20200925141231eucas1p223c342cc989df23e4fc28d97fe3010c5@eucas1p2.samsung.com> 2020-09-25 14:12 ` [PATCH 1/8] dma-mapping: add DMA_ATTR_LOW_ADDRESS attribute Marek Szyprowski 2020-09-25 14:12 ` Marek Szyprowski 2020-09-25 16:20 ` Christoph Hellwig 2020-09-25 16:20 ` Christoph Hellwig [not found] ` <CGME20200925141231eucas1p22043424ba07b99f7727f750487a55b6d@eucas1p2.samsung.com> 2020-09-25 14:12 ` [PATCH 2/8] iommu: iova: properly handle 0 as a valid IOVA address Marek Szyprowski 2020-09-25 14:12 ` Marek Szyprowski [not found] ` <CGME20200925141232eucas1p1c021913b0c2505e6c77e5078cf2be74f@eucas1p1.samsung.com> 2020-09-25 14:12 ` [PATCH 3/8] iommu: iova: add support for 'first-fit' algorithm Marek Szyprowski 2020-09-25 14:12 ` Marek Szyprowski [not found] ` <CGME20200925141232eucas1p29ad64ca3bc90bb3cbfad9b385cb3d9ef@eucas1p2.samsung.com> 2020-09-25 14:12 ` [PATCH 4/8] iommu: dma-iommu: refactor iommu_dma_alloc_iova() Marek Szyprowski 2020-09-25 14:12 ` Marek Szyprowski [not found] ` <CGME20200925141233eucas1p2148ace93f157bd631edd8db4e8df664b@eucas1p2.samsung.com> 2020-09-25 14:12 ` [PATCH 5/8] iommu: dma-iommu: add support for DMA_ATTR_LOW_ADDRESS Marek Szyprowski 2020-09-25 14:12 ` Marek Szyprowski [not found] ` <CGME20200925141234eucas1p13ab5a15da95185dcc99300772d0d72ce@eucas1p1.samsung.com> 2020-09-25 14:12 ` [PATCH 6/8] media: platform: exynos4-is: remove all references to physicall addresses Marek Szyprowski 2020-09-25 14:12 ` Marek Szyprowski [not found] ` <CGME20200925141234eucas1p2876321230b7f0910242e0e28b3a8388b@eucas1p2.samsung.com> 2020-09-25 14:12 ` [PATCH 7/8] media: platform: exynos4-is: use DMA_ATTR_LOW_ADDRESS Marek Szyprowski 2020-09-25 14:12 ` Marek Szyprowski [not found] ` <CGME20200925141235eucas1p17c6aceae82acfc424cdc7521938c1510@eucas1p1.samsung.com> 2020-09-25 14:12 ` [PATCH 8/8] media: platform: s5p-mfc: " Marek Szyprowski 2020-09-25 14:12 ` Marek Szyprowski
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