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| author | Leon Romanovsky <leonro@nvidia.com> | 2024-07-24 21:04:49 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2024-08-22 07:18:11 +0300 |
| commit | b5c58b2fdc427e7958412ecb2de2804a1f7c1572 (patch) | |
| tree | 6990c73ac5918df08b138af03ad83519368e0221 /include/linux/device.h | |
| parent | f69e342eec008e1bab772d3963c3dd9979293e13 (diff) | |
| download | linux-b5c58b2fdc427e7958412ecb2de2804a1f7c1572.tar.xz | |
dma-mapping: direct calls for dma-iommu
Directly call into dma-iommu just like we have been doing for dma-direct
for a while. This avoids the indirect call overhead for IOMMU ops and
removes the need to have DMA ops entirely for many common configurations.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/device.h')
| -rw-r--r-- | include/linux/device.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 34eb20f5966f..1c5280d28bc3 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -707,6 +707,8 @@ struct device_physical_location { * for dma allocations. This flag is managed by the dma ops * instance from ->dma_supported. * @dma_skip_sync: DMA sync operations can be skipped for coherent buffers. + * @dma_iommu: Device is using default IOMMU implementation for DMA and + * doesn't rely on dma_ops structure. * * At the lowest level, every device in a Linux system is represented by an * instance of struct device. The device structure contains the information @@ -822,6 +824,9 @@ struct device { #ifdef CONFIG_DMA_NEED_SYNC bool dma_skip_sync:1; #endif +#ifdef CONFIG_IOMMU_DMA + bool dma_iommu:1; +#endif }; /** |