diff options
| author |   Christoph Hellwig <hch@lst.de> | 2018-08-19 14:53:20 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-09-20 09:01:15 +0200 |
| commit | f3ecc0ff0457eae93503792c6fc35921fa8a6204 (patch) | |
| tree | cbaa1fbb29ea8d5b33fb8d1798e595147cb72729 /include/linux/dma-noncoherent.h | |
| parent | MIPS: don't select DMA_MAYBE_COHERENT from DMA_PERDEV_COHERENT (diff) | |
| download | wireguard-linux-f3ecc0ff0457eae93503792c6fc35921fa8a6204.tar.xz wireguard-linux-f3ecc0ff0457eae93503792c6fc35921fa8a6204.zip | |
dma-mapping: move the dma_coherent flag to struct device
Various architectures support both coherent and non-coherent dma on a
per-device basis. Move the dma_noncoherent flag from the mips archdata
field to struct device proper to prepare the infrastructure for reuse on
other architectures.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Burton <paul.burton@mips.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/dma-noncoherent.h')
| -rw-r--r-- | include/linux/dma-noncoherent.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/dma-noncoherent.h b/include/linux/dma-noncoherent.h index a0aa00cc909d..ce9732506ef4 100644 --- a/include/linux/dma-noncoherent.h +++ b/include/linux/dma-noncoherent.h @@ -4,6 +4,22 @@ #include <linux/dma-mapping.h> +#ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H +#include <asm/dma-coherence.h> +#elif defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) +static inline bool dev_is_dma_coherent(struct device *dev) +{ + return dev->dma_coherent; +} +#else +static inline bool dev_is_dma_coherent(struct device *dev) +{ + return true; +} +#endif /* CONFIG_ARCH_HAS_DMA_COHERENCE_H */ + void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, |