diff options
author | Christoph Hellwig <hch@lst.de> | 2020-02-21 15:55:43 -0800 |
---|---|---|
committer | Christoph Hellwig <hch@lst.de> | 2020-03-16 10:48:09 +0100 |
commit | fa7e2247c5729f990c7456fe09f3af99c8f2571b (patch) | |
tree | 65aa46af4ff51a93301caca46b509c34267bfe40 /arch/mips | |
parent | 3d0fc341c4bb66b2c41c0d1ec954a6d300e100b7 (diff) | |
download | linux-fa7e2247c5729f990c7456fe09f3af99c8f2571b.tar.bz2 |
dma-direct: make uncached_kernel_address more general
Rename the symbol to arch_dma_set_uncached, and pass a size to it as
well as allow an error return. That will allow reusing this hook for
in-place pagetable remapping.
As the in-place remap doesn't always require an explicit cache flush,
also detangle ARCH_HAS_DMA_PREP_COHERENT from ARCH_HAS_DMA_SET_UNCACHED.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'arch/mips')
-rw-r--r-- | arch/mips/Kconfig | 3 | ||||
-rw-r--r-- | arch/mips/mm/dma-noncoherent.c | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 797d7f1ad5fe..489185db501e 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1187,8 +1187,9 @@ config DMA_NONCOHERENT # significant advantages. # select ARCH_HAS_DMA_WRITE_COMBINE + select ARCH_HAS_DMA_PREP_COHERENT select ARCH_HAS_SYNC_DMA_FOR_DEVICE - select ARCH_HAS_UNCACHED_SEGMENT + select ARCH_HAS_DMA_SET_UNCACHED select DMA_NONCOHERENT_MMAP select DMA_NONCOHERENT_CACHE_SYNC select NEED_DMA_MAP_STATE diff --git a/arch/mips/mm/dma-noncoherent.c b/arch/mips/mm/dma-noncoherent.c index 77dce28ad0a0..fcea92d95d86 100644 --- a/arch/mips/mm/dma-noncoherent.c +++ b/arch/mips/mm/dma-noncoherent.c @@ -49,7 +49,7 @@ void arch_dma_prep_coherent(struct page *page, size_t size) dma_cache_wback_inv((unsigned long)page_address(page), size); } -void *uncached_kernel_address(void *addr) +void *arch_dma_set_uncached(void *addr, size_t size) { return (void *)(__pa(addr) + UNCAC_BASE); } |