diff options
Diffstat (limited to 'arch/arm64/include/asm/dma-direct.h')
| -rw-r--r-- | arch/arm64/include/asm/dma-direct.h | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/arch/arm64/include/asm/dma-direct.h b/arch/arm64/include/asm/dma-direct.h deleted file mode 100644 index abb1b40ec751..000000000000 --- a/arch/arm64/include/asm/dma-direct.h +++ /dev/null @@ -1,43 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __ASM_DMA_DIRECT_H -#define __ASM_DMA_DIRECT_H - -#include <linux/jump_label.h> -#include <linux/swiotlb.h> - -#include <asm/cache.h> - -DECLARE_STATIC_KEY_FALSE(swiotlb_noncoherent_bounce); - -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - dma_addr_t dev_addr = (dma_addr_t)paddr; - - return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) -{ - phys_addr_t paddr = (phys_addr_t)dev_addr; - - return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); -} - -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return false; - - /* - * Force swiotlb buffer bouncing when ARCH_DMA_MINALIGN < CWG. The - * swiotlb bounce buffers are aligned to (1 << IO_TLB_SHIFT). - */ - if (static_branch_unlikely(&swiotlb_noncoherent_bounce) && - !is_device_dma_coherent(dev) && - !is_swiotlb_buffer(dma_to_phys(dev, addr))) - return false; - - return addr + size - 1 <= *dev->dma_mask; -} - -#endif /* __ASM_DMA_DIRECT_H */ |