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 7/8] media: platform: exynos4-is: use DMA_ATTR_LOW_ADDRESS Date: Fri, 25 Sep 2020 16:12:17 +0200 [thread overview] Message-ID: <20200925141218.13550-8-m.szyprowski@samsung.com> (raw) In-Reply-To: <20200925141218.13550-1-m.szyprowski@samsung.com> Exynos4-IS driver relied on the way the ARM DMA-IOMMU glue code worked - mainly it relied on the fact that the allocator used first-fit algorithm and the first allocated buffer were at 0x0 DMA/IOVA address. This is not true for the generic IOMMU-DMA glue code that will be used for ARM architecture soon, so add the needed DMA attribute to force such behavior of the DMA-mapping code. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/media/platform/exynos4-is/fimc-is.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/exynos4-is/fimc-is.c b/drivers/media/platform/exynos4-is/fimc-is.c index 41b841a96338..9d3556eae5d3 100644 --- a/drivers/media/platform/exynos4-is/fimc-is.c +++ b/drivers/media/platform/exynos4-is/fimc-is.c @@ -335,8 +335,9 @@ static int fimc_is_alloc_cpu_memory(struct fimc_is *is) { struct device *dev = &is->pdev->dev; - is->memory.vaddr = dma_alloc_coherent(dev, FIMC_IS_CPU_MEM_SIZE, - &is->memory.addr, GFP_KERNEL); + is->memory.vaddr = dma_alloc_attrs(dev, FIMC_IS_CPU_MEM_SIZE, + &is->memory.addr, GFP_KERNEL, + DMA_ATTR_LOW_ADDRESS); if (is->memory.vaddr == NULL) return -ENOMEM; -- 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 7/8] media: platform: exynos4-is: use DMA_ATTR_LOW_ADDRESS Date: Fri, 25 Sep 2020 16:12:17 +0200 [thread overview] Message-ID: <20200925141218.13550-8-m.szyprowski@samsung.com> (raw) In-Reply-To: <20200925141218.13550-1-m.szyprowski@samsung.com> Exynos4-IS driver relied on the way the ARM DMA-IOMMU glue code worked - mainly it relied on the fact that the allocator used first-fit algorithm and the first allocated buffer were at 0x0 DMA/IOVA address. This is not true for the generic IOMMU-DMA glue code that will be used for ARM architecture soon, so add the needed DMA attribute to force such behavior of the DMA-mapping code. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/media/platform/exynos4-is/fimc-is.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/exynos4-is/fimc-is.c b/drivers/media/platform/exynos4-is/fimc-is.c index 41b841a96338..9d3556eae5d3 100644 --- a/drivers/media/platform/exynos4-is/fimc-is.c +++ b/drivers/media/platform/exynos4-is/fimc-is.c @@ -335,8 +335,9 @@ static int fimc_is_alloc_cpu_memory(struct fimc_is *is) { struct device *dev = &is->pdev->dev; - is->memory.vaddr = dma_alloc_coherent(dev, FIMC_IS_CPU_MEM_SIZE, - &is->memory.addr, GFP_KERNEL); + is->memory.vaddr = dma_alloc_attrs(dev, FIMC_IS_CPU_MEM_SIZE, + &is->memory.addr, GFP_KERNEL, + DMA_ATTR_LOW_ADDRESS); if (is->memory.vaddr == NULL) return -ENOMEM; -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-09-25 14:13 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 ` [PATCH 0/8] IOMMU-DMA - support old allocation algorithm used on ARM Marek Szyprowski 2020-09-25 14:12 ` 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 ` Marek Szyprowski [this message] 2020-09-25 14:12 ` [PATCH 7/8] media: platform: exynos4-is: use DMA_ATTR_LOW_ADDRESS 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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