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| author | Dmitry Osipenko <digetx@gmail.com> | 2018-08-30 03:12:47 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2018-09-26 18:11:14 +0300 |
| commit | e31c8ea5aff8670275e4e451fdc3bca5fbc8a528 (patch) | |
| tree | e14f0dad913d0e79f13bf68c69ae253ddc818ed4 /drivers/gpu/host1x/dev.c | |
| parent | 50bac83c80dd20e6c6b80afccadf5c70cbbc816e (diff) | |
| download | linux-e31c8ea5aff8670275e4e451fdc3bca5fbc8a528.tar.xz | |
gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32
Host1x is getting attached to an implicit IOMMU DMA domain if
CONFIG_ARM_DMA_USE_IOMMU=y. Since Host1x driver manages IOMMU by
itself, Host1x device must be detached from the implicit domain using
arch-specific IOMMU-API.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/host1x/dev.c')
| -rw-r--r-- | drivers/gpu/host1x/dev.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c index d88073e7d22d..de6bc4e7fa23 100644 --- a/drivers/gpu/host1x/dev.c +++ b/drivers/gpu/host1x/dev.c @@ -29,6 +29,10 @@ #include <trace/events/host1x.h> #undef CREATE_TRACE_POINTS +#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU) +#include <asm/dma-iommu.h> +#endif + #include "bus.h" #include "channel.h" #include "debug.h" @@ -217,7 +221,14 @@ static int host1x_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to get reset: %d\n", err); return err; } - +#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU) + if (host->dev->archdata.mapping) { + struct dma_iommu_mapping *mapping = + to_dma_iommu_mapping(host->dev); + arm_iommu_detach_device(host->dev); + arm_iommu_release_mapping(mapping); + } +#endif if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL)) goto skip_iommu; |