From 1dc7c8ed7cb378dd3974387692dfa833aee718d4 Mon Sep 17 00:00:00 2001 From: Robin Murphy Date: Mon, 28 Oct 2024 17:58:35 +0000 Subject: [PATCH] remoteproc: omap: Handle ARM dma_iommu_mapping It's no longer practical for the OMAP IOMMU driver to trick arm_setup_iommu_dma_ops() into ignoring its presence, so let's use the same tactic as other IOMMU API users on 32-bit ARM and explicitly kick the arch code's dma_iommu_mapping out of the way to avoid problems. Fixes: 4720287c7bf7 ("iommu: Remove struct iommu_ops *iommu from arch_setup_dma_ops()") Signed-off-by: Robin Murphy Tested-by: Beleswar Padhi Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/6186e311cb6f64a787f87fd41e49a73f409b789c.1730136799.git.robin.murphy@arm.com [Fixed changelog title] Signed-off-by: Mathieu Poirier --- drivers/remoteproc/omap_remoteproc.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c index 9ae2e831456d..3260dd512491 100644 --- a/drivers/remoteproc/omap_remoteproc.c +++ b/drivers/remoteproc/omap_remoteproc.c @@ -37,6 +37,10 @@ #include +#ifdef CONFIG_ARM_DMA_USE_IOMMU +#include +#endif + #include "omap_remoteproc.h" #include "remoteproc_internal.h" @@ -1323,6 +1327,19 @@ static int omap_rproc_probe(struct platform_device *pdev) /* All existing OMAP IPU and DSP processors have an MMU */ rproc->has_iommu = true; +#ifdef CONFIG_ARM_DMA_USE_IOMMU + /* + * Throw away the ARM DMA mapping that we'll never use, so it doesn't + * interfere with the core rproc->domain and we get the right DMA ops. + */ + if (pdev->dev.archdata.mapping) { + struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(&pdev->dev); + + arm_iommu_detach_device(&pdev->dev); + arm_iommu_release_mapping(mapping); + } +#endif + ret = omap_rproc_of_get_internal_memories(pdev, rproc); if (ret) return ret; -- 2.50.1