LCOV - code coverage report
Current view: top level - include/asm-generic - scatterlist.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 2 2 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       1             : #ifndef __ASM_GENERIC_SCATTERLIST_H
       2             : #define __ASM_GENERIC_SCATTERLIST_H
       3             : 
       4             : #include <linux/types.h>
       5             : 
       6             : struct scatterlist {
       7             : #ifdef CONFIG_DEBUG_SG
       8             :         unsigned long   sg_magic;
       9             : #endif
      10             :         unsigned long   page_link;
      11             :         unsigned int    offset;
      12             :         unsigned int    length;
      13             :         dma_addr_t      dma_address;
      14             :         unsigned int    dma_length;
      15             : };
      16             : 
      17           1 : /*
      18             :  * These macros should be used after a dma_map_sg call has been done
      19             :  * to get bus addresses of each of the SG entries and their lengths.
      20           1 :  * You should only work with the number of sg entries pci_map_sg
      21             :  * returns, or alternatively stop on the first sg_dma_len(sg) which
      22             :  * is 0.
      23             :  */
      24             : #define sg_dma_address(sg)      ((sg)->dma_address)
      25             : #ifndef sg_dma_len
      26             : /*
      27             :  * Normally, you have an iommu on 64 bit machines, but not on 32 bit
      28             :  * machines. Architectures that are differnt should override this.
      29             :  */
      30             : #if __BITS_PER_LONG == 64
      31             : #define sg_dma_len(sg)          ((sg)->dma_length)
      32             : #else
      33             : #define sg_dma_len(sg)          ((sg)->length)
      34             : #endif /* 64 bit */
      35             : #endif /* sg_dma_len */
      36             : 
      37             : #ifndef ISA_DMA_THRESHOLD
      38             : #define ISA_DMA_THRESHOLD       (~0UL)
      39             : #endif
      40             : 
      41             : #define ARCH_HAS_SG_CHAIN
      42             : 
      43             : #endif /* __ASM_GENERIC_SCATTERLIST_H */

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