diff options
Diffstat (limited to 'drivers/iommu/dma-iommu.h')
| -rw-r--r-- | drivers/iommu/dma-iommu.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/iommu/dma-iommu.h b/drivers/iommu/dma-iommu.h new file mode 100644 index 0000000000..c829f1f82a --- /dev/null +++ b/drivers/iommu/dma-iommu.h @@ -0,0 +1,50 @@ +/* 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 */ |