~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/dma-direct.h

Version: ~ [ linux-5.12-rc7 ] ~ [ linux-5.11.13 ] ~ [ linux-5.10.29 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.111 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.186 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.230 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.266 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.266 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _LINUX_DMA_DIRECT_H
  3 #define _LINUX_DMA_DIRECT_H 1
  4 
  5 #include <linux/dma-mapping.h>
  6 #include <linux/mem_encrypt.h>
  7 
  8 #ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
  9 #include <asm/dma-direct.h>
 10 #else
 11 static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
 12 {
 13         dma_addr_t dev_addr = (dma_addr_t)paddr;
 14 
 15         return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
 16 }
 17 
 18 static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
 19 {
 20         phys_addr_t paddr = (phys_addr_t)dev_addr;
 21 
 22         return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
 23 }
 24 
 25 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 26 {
 27         if (!dev->dma_mask)
 28                 return false;
 29 
 30         return addr + size - 1 <= *dev->dma_mask;
 31 }
 32 #endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
 33 
 34 /*
 35  * If memory encryption is supported, phys_to_dma will set the memory encryption
 36  * bit in the DMA address, and dma_to_phys will clear it.  The raw __phys_to_dma
 37  * and __dma_to_phys versions should only be used on non-encrypted memory for
 38  * special occasions like DMA coherent buffers.
 39  */
 40 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
 41 {
 42         return __sme_set(__phys_to_dma(dev, paddr));
 43 }
 44 
 45 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
 46 {
 47         return __sme_clr(__dma_to_phys(dev, daddr));
 48 }
 49 
 50 #ifdef CONFIG_ARCH_HAS_DMA_MARK_CLEAN
 51 void dma_mark_clean(void *addr, size_t size);
 52 #else
 53 static inline void dma_mark_clean(void *addr, size_t size)
 54 {
 55 }
 56 #endif /* CONFIG_ARCH_HAS_DMA_MARK_CLEAN */
 57 
 58 void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
 59                 gfp_t gfp, unsigned long attrs);
 60 void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
 61                 dma_addr_t dma_addr, unsigned long attrs);
 62 dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
 63                 unsigned long offset, size_t size, enum dma_data_direction dir,
 64                 unsigned long attrs);
 65 int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
 66                 enum dma_data_direction dir, unsigned long attrs);
 67 int dma_direct_supported(struct device *dev, u64 mask);
 68 int dma_direct_mapping_error(struct device *dev, dma_addr_t dma_addr);
 69 #endif /* _LINUX_DMA_DIRECT_H */
 70 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp