1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2014-2015 ARM Ltd.
8 #include <linux/errno.h>
9 #include <linux/types.h>
11 #ifdef CONFIG_IOMMU_DMA
12 #include <linux/dma-mapping.h>
13 #include <linux/iommu.h>
14 #include <linux/msi.h>
16 /* Domain management interface for IOMMU drivers */
17 int iommu_get_dma_cookie(struct iommu_domain *domain);
18 int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base);
19 void iommu_put_dma_cookie(struct iommu_domain *domain);
21 /* Setup call for arch DMA mapping code */
22 void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit);
24 /* The DMA API isn't _quite_ the whole story, though... */
26 * iommu_dma_prepare_msi() - Map the MSI page in the IOMMU device
28 * The MSI page will be stored in @desc.
30 * Return: 0 on success otherwise an error describing the failure.
32 int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr);
34 /* Update the MSI message if required. */
35 void iommu_dma_compose_msi_msg(struct msi_desc *desc,
38 void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);
40 void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
41 struct iommu_domain *domain);
43 extern bool iommu_dma_forcedac;
45 #else /* CONFIG_IOMMU_DMA */
52 static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base,
57 static inline int iommu_get_dma_cookie(struct iommu_domain *domain)
62 static inline int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base)
67 static inline void iommu_put_dma_cookie(struct iommu_domain *domain)
71 static inline int iommu_dma_prepare_msi(struct msi_desc *desc,
77 static inline void iommu_dma_compose_msi_msg(struct msi_desc *desc,
82 static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
86 #endif /* CONFIG_IOMMU_DMA */
87 #endif /* __DMA_IOMMU_H */