diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-06-15 13:08:36 +0200 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2018-06-24 18:26:03 +0200 |
| commit | f6d302e33d68ddbaf99c774ed994599243462b24 (patch) | |
| tree | 62aba80f4998764b95b5cf7d521bf44b6f9ba96f /arch/mips/include/asm/dma-direct.h | |
| parent | MIPS: loongson: remove loongson_dma_supported (diff) | |
| download | linux-f6d302e33d68ddbaf99c774ed994599243462b24.tar.xz linux-f6d302e33d68ddbaf99c774ed994599243462b24.zip | |
MIPS: consolidate the swiotlb implementations
Octeon and Loongson share exactly the same code, move it into a common
implementation, and use that implementation directly from get_arch_dma_ops.
Also provide the expected dma-direct.h helpers directly instead of
delegating to platform dma-coherence.h headers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19534/
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Tom Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: iommu@lists.linux-foundation.org
Cc: linux-mips@linux-mips.org
Diffstat (limited to 'arch/mips/include/asm/dma-direct.h')
| -rw-r--r-- | arch/mips/include/asm/dma-direct.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/mips/include/asm/dma-direct.h b/arch/mips/include/asm/dma-direct.h index f32f15530aba..b5c240806e1b 100644 --- a/arch/mips/include/asm/dma-direct.h +++ b/arch/mips/include/asm/dma-direct.h @@ -1 +1,16 @@ -#include <asm/dma-coherence.h> +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _MIPS_DMA_DIRECT_H +#define _MIPS_DMA_DIRECT_H 1 + +static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) +{ + if (!dev->dma_mask) + return false; + + return addr + size - 1 <= *dev->dma_mask; +} + +dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr); +phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr); + +#endif /* _MIPS_DMA_DIRECT_H */ |