| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2014-2015 ARM Ltd. |
| */ |
| #ifndef __DMA_IOMMU_H |
| #define __DMA_IOMMU_H |
| |
| #include <linux/iommu.h> |
| |
| #ifdef CONFIG_IOMMU_DMA |
| |
| int iommu_get_dma_cookie(struct iommu_domain *domain); |
| void iommu_put_dma_cookie(struct iommu_domain *domain); |
| |
| int iommu_dma_init_fq(struct iommu_domain *domain); |
| |
| void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list); |
| |
| extern bool iommu_dma_forcedac; |
| static inline void iommu_dma_set_pci_32bit_workaround(struct device *dev) |
| { |
| dev->iommu->pci_32bit_workaround = !iommu_dma_forcedac; |
| } |
| |
| #else /* CONFIG_IOMMU_DMA */ |
| |
| static inline int iommu_dma_init_fq(struct iommu_domain *domain) |
| { |
| return -EINVAL; |
| } |
| |
| static inline int iommu_get_dma_cookie(struct iommu_domain *domain) |
| { |
| return -ENODEV; |
| } |
| |
| static inline void iommu_put_dma_cookie(struct iommu_domain *domain) |
| { |
| } |
| |
| static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list) |
| { |
| } |
| |
| static inline void iommu_dma_set_pci_32bit_workaround(struct device *dev) |
| { |
| } |
| |
| #endif /* CONFIG_IOMMU_DMA */ |
| #endif /* __DMA_IOMMU_H */ |
