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authorChristoph Hellwig <hch@lst.de>2019-10-29 11:01:37 +0100
committerChristoph Hellwig <hch@lst.de>2019-11-11 10:52:15 +0100
commit34dc0ea6bc960f1f57b2148f01a3f4da23f87013 (patch)
treef6d10010989435562d0ece0971ed992febe6c26c /arch/mips/Kconfig
parent4e1003aa56a7d60ddb048e43a7a51368fcfe36af (diff)
downloadlwn-34dc0ea6bc960f1f57b2148f01a3f4da23f87013.tar.gz
lwn-34dc0ea6bc960f1f57b2148f01a3f4da23f87013.zip
dma-direct: provide mmap and get_sgtable method overrides
For dma-direct we know that the DMA address is an encoding of the physical address that we can trivially decode. Use that fact to provide implementations that do not need the arch_dma_coherent_to_pfn architecture hook. Note that we still can only support mmap of non-coherent memory only if the architecture provides a way to set an uncached bit in the page tables. This must be true for architectures that use the generic remap helpers, but other architectures can also manually select it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/mips/Kconfig')
-rw-r--r--arch/mips/Kconfig4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index a0bd9bdb5f83..248d39b8a160 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1134,9 +1134,9 @@ config DMA_NONCOHERENT
select ARCH_HAS_DMA_WRITE_COMBINE
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select ARCH_HAS_UNCACHED_SEGMENT
- select NEED_DMA_MAP_STATE
- select ARCH_HAS_DMA_COHERENT_TO_PFN
+ select DMA_NONCOHERENT_MMAP
select DMA_NONCOHERENT_CACHE_SYNC
+ select NEED_DMA_MAP_STATE
config SYS_HAS_EARLY_PRINTK
bool