arch/arm/include/asm/dma-iommu.h

   1 #ifndef ASMARM_DMA_IOMMU_H
   2 #define ASMARM_DMA_IOMMU_H
   3
   4 #ifdef __KERNEL__
   5
   6 #include <linux/mm_types.h>
   7 #include <linux/scatterlist.h>
   8 #include <linux/dma-debug.h>
   9 #include <linux/kmemcheck.h>
  10 #include <linux/kref.h>
  11
  12 struct dma_iommu_mapping {
  13         /* iommu specific data */
  14         struct iommu_domain     *domain;
  15
  16         void                    *bitmap;
  17         size_t                  bits;
  18         unsigned int            order;
  19         dma_addr_t              base;
  20
  21         spinlock_t              lock;
  22         struct kref             kref;
  23 };
  24
  25 struct dma_iommu_mapping *
  26 arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size,
  27                          int order);
  28
  29 void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
  30
  31 int arm_iommu_attach_device(struct device *dev,
  32                                         struct dma_iommu_mapping *mapping);
  33 void arm_iommu_detach_device(struct device *dev);
  34
  35 #endif /* __KERNEL__ */
  36 #endif