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authorChristoph Hellwig <hch@lst.de>2018-04-16 16:24:51 +0300
committerChristoph Hellwig <hch@lst.de>2018-05-19 09:46:12 +0300
commit782e6769c0df744e773dc2acff71c974b3bba4e9 (patch)
tree4b7f513da50a3bce1cca7a28949258642e9c8ab7 /lib/Kconfig
parent35ddb69cd223eea5b1c68af753ed014208b6144e (diff)
downloadlinux-782e6769c0df744e773dc2acff71c974b3bba4e9.tar.xz
dma-mapping: provide a generic dma-noncoherent implementation
Add a new dma_map_ops implementation that uses dma-direct for the address mapping of streaming mappings, and which requires arch-specific implemenations of coherent allocate/free. Architectures have to provide flushing helpers to ownership trasnfers to the device and/or CPU, and can provide optional implementations of the coherent mmap functionality, and the cache_flush routines for non-coherent long term allocations. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Alexey Brodkin <abrodkin@synopsys.com> Acked-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'lib/Kconfig')
-rw-r--r--lib/Kconfig20
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 6c4e9d0ce5d1..7a913937888b 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -441,10 +441,30 @@ config ARCH_DMA_ADDR_T_64BIT
config IOMMU_HELPER
bool
+config ARCH_HAS_SYNC_DMA_FOR_DEVICE
+ bool
+
+config ARCH_HAS_SYNC_DMA_FOR_CPU
+ bool
+ select NEED_DMA_MAP_STATE
+
config DMA_DIRECT_OPS
bool
depends on HAS_DMA
+config DMA_NONCOHERENT_OPS
+ bool
+ depends on HAS_DMA
+ select DMA_DIRECT_OPS
+
+config DMA_NONCOHERENT_MMAP
+ bool
+ depends on DMA_NONCOHERENT_OPS
+
+config DMA_NONCOHERENT_CACHE_SYNC
+ bool
+ depends on DMA_NONCOHERENT_OPS
+
config DMA_VIRT_OPS
bool
depends on HAS_DMA