drivers/iommu/dma-iommu.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2014-2015 ARM Ltd.
   4  */
   5 #ifndef __DMA_IOMMU_H
   6 #define __DMA_IOMMU_H
   7
   8 #include <linux/iommu.h>
   9
  10 #ifdef CONFIG_IOMMU_DMA
  11
  12 void iommu_setup_dma_ops(struct device *dev);
  13
  14 int iommu_get_dma_cookie(struct iommu_domain *domain);
  15 void iommu_put_dma_cookie(struct iommu_domain *domain);
  16
  17 int iommu_dma_init_fq(struct iommu_domain *domain);
  18
  19 void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);
  20
  21 extern bool iommu_dma_forcedac;
  22
  23 #else /* CONFIG_IOMMU_DMA */
  24
  25 static inline void iommu_setup_dma_ops(struct device *dev)
  26 {
  27 }
  28
  29 static inline int iommu_dma_init_fq(struct iommu_domain *domain)
  30 {
  31         return -EINVAL;
  32 }
  33
  34 static inline int iommu_get_dma_cookie(struct iommu_domain *domain)
  35 {
  36         return -ENODEV;
  37 }
  38
  39 static inline void iommu_put_dma_cookie(struct iommu_domain *domain)
  40 {
  41 }
  42
  43 static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
  44 {
  45 }
  46
  47 #endif  /* CONFIG_IOMMU_DMA */
  48 #endif  /* __DMA_IOMMU_H */