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dma-mapping: remove dma_max_pfn

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These days, the DMA mapping code must bounce buffers for any unsupported
address. If the driver needs to optimize for natively supported ranges,
then it should use dma_get_required_mask.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Christoph Hellwig 2019-06-25 11:20:42 +02:00 committed by Ulf Hansson
parent 7559d612df
commit 79a986721d
2 changed files with 0 additions and 14 deletions
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7
arch/arm/include/asm/dma-mapping.h
View file

@ -89,13 +89,6 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
}
#endif
/* The ARM override for dma_max_pfn() */
static inline unsigned long dma_max_pfn(struct device *dev)
{
return dma_to_pfn(dev, *dev->dma_mask);
}
#define dma_max_pfn(dev) dma_max_pfn(dev)
/* do not use this function in a driver */
static inline bool is_device_dma_coherent(struct device *dev)
{

7
include/linux/dma-mapping.h
View file

@ -729,13 +729,6 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
return -EIO;
}
#ifndef dma_max_pfn
static inline unsigned long dma_max_pfn(struct device *dev)
{
return (*dev->dma_mask >> PAGE_SHIFT) + dev->dma_pfn_offset;
}
#endif
static inline int dma_get_cache_alignment(void)
{
#ifdef ARCH_DMA_MINALIGN