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| author |   Christoph Hellwig <hch@lst.de> | 2020-07-08 12:22:47 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-07-19 09:29:29 +0200 |
| commit | f1565c24b5965dfd2352f209c417ff160be04db9 (patch) | |
| tree | ce6e2eb7bec5b8c56966b3ce45ca5f1c6d8dafcd /arch/powerpc/include/asm/device.h | |
| parent | dma-mapping: add a dma_ops_bypass flag to struct device (diff) | |
| download | linux-dev-f1565c24b5965dfd2352f209c417ff160be04db9.tar.xz linux-dev-f1565c24b5965dfd2352f209c417ff160be04db9.zip | |
powerpc: use the generic dma_ops_bypass mode
Use the DMA API bypass mechanism for direct window mappings. This uses
common code and speed up the direct mapping case by avoiding indirect
calls just when not using dma ops at all. It also fixes a problem where
the sync_* methods were using the bypass check for DMA allocations, but
those are part of the streaming ops.
Note that this patch loses the DMA_ATTR_WEAK_ORDERING override, which
has never been well defined, as is only used by a few drivers, which
IIRC never showed up in the typical Cell blade setups that are affected
by the ordering workaround.
Fixes: efd176a04bef ("powerpc/pseries/dma: Allow SWIOTLB")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Diffstat (limited to 'arch/powerpc/include/asm/device.h')
| -rw-r--r-- | arch/powerpc/include/asm/device.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h index 266542769e4b..452402215e12 100644 --- a/arch/powerpc/include/asm/device.h +++ b/arch/powerpc/include/asm/device.h @@ -19,11 +19,6 @@ struct iommu_table; */ struct dev_archdata { /* - * Set to %true if the dma_iommu_ops are requested to use a direct - * window instead of dynamically mapping memory. - */ - bool iommu_bypass : 1; - /* * These two used to be a union. However, with the hybrid ops we need * both so here we store both a DMA offset for direct mappings and * an iommu_table for remapped DMA. |