LCOV - code coverage report
Current view: top level - include/linux - iommu-helper.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 7 0.0 %
Date: 2022-04-01 13:59:58 Functions: 0 1 0.0 %
Branches: 0 6 0.0 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: GPL-2.0 */
       2                 :            : #ifndef _LINUX_IOMMU_HELPER_H
       3                 :            : #define _LINUX_IOMMU_HELPER_H
       4                 :            : 
       5                 :            : #include <linux/bug.h>
       6                 :            : #include <linux/kernel.h>
       7                 :            : 
       8                 :            : static inline unsigned long iommu_device_max_index(unsigned long size,
       9                 :            :                                                    unsigned long offset,
      10                 :            :                                                    u64 dma_mask)
      11                 :            : {
      12                 :            :         if (size + offset > dma_mask)
      13                 :            :                 return dma_mask - offset + 1;
      14                 :            :         else
      15                 :            :                 return size;
      16                 :            : }
      17                 :            : 
      18                 :          0 : static inline int iommu_is_span_boundary(unsigned int index, unsigned int nr,
      19                 :            :                 unsigned long shift, unsigned long boundary_size)
      20                 :            : {
      21   [ #  #  #  # ]:          0 :         BUG_ON(!is_power_of_2(boundary_size));
      22                 :            : 
      23                 :          0 :         shift = (shift + index) & (boundary_size - 1);
      24                 :          0 :         return shift + nr > boundary_size;
      25                 :            : }
      26                 :            : 
      27                 :            : extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
      28                 :            :                                       unsigned long start, unsigned int nr,
      29                 :            :                                       unsigned long shift,
      30                 :            :                                       unsigned long boundary_size,
      31                 :            :                                       unsigned long align_mask);
      32                 :            : 
      33                 :          0 : static inline unsigned long iommu_num_pages(unsigned long addr,
      34                 :            :                                             unsigned long len,
      35                 :            :                                             unsigned long io_page_size)
      36                 :            : {
      37                 :          0 :         unsigned long size = (addr & (io_page_size - 1)) + len;
      38                 :            : 
      39         [ #  # ]:          0 :         return DIV_ROUND_UP(size, io_page_size);
      40                 :            : }
      41                 :            : 
      42                 :            : #endif

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