summaryrefslogtreecommitdiff
path: root/include/linux/iommu.h
diff options
context:
space:
mode:
authorRobin Murphy <robin.murphy@arm.com>2022-08-16 18:28:04 +0100
committerJoerg Roedel <jroedel@suse.de>2022-09-07 14:47:00 +0200
commitfa49364cd5e65797014688cba623541083b3e5b0 (patch)
treedb6fa6420c1ba8771eeb895b2a5eddcfebb583a5 /include/linux/iommu.h
parentde9f8a91eb32bb79149c4fc790df3b54ae710d18 (diff)
iommu/dma: Move public interfaces to linux/iommu.h
The iommu-dma layer is now mostly encapsulated by iommu_dma_ops, with only a couple more public interfaces left pertaining to MSI integration. Since these depend on the main IOMMU API header anyway, move their declarations there, taking the opportunity to update the half-baked comments to proper kerneldoc along the way. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/9cd99738f52094e6bed44bfee03fa4f288d20695.1660668998.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/iommu.h')
-rw-r--r--include/linux/iommu.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 35810f87ae74..a325532aeab5 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -1063,4 +1063,40 @@ void iommu_debugfs_setup(void);
static inline void iommu_debugfs_setup(void) {}
#endif
+#ifdef CONFIG_IOMMU_DMA
+#include <linux/msi.h>
+
+/* Setup call for arch DMA mapping code */
+void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit);
+
+int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base);
+
+int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr);
+void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg);
+
+#else /* CONFIG_IOMMU_DMA */
+
+struct msi_desc;
+struct msi_msg;
+
+static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit)
+{
+}
+
+static inline int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base)
+{
+ return -ENODEV;
+}
+
+static inline int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr)
+{
+ return 0;
+}
+
+static inline void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
+{
+}
+
+#endif /* CONFIG_IOMMU_DMA */
+
#endif /* __LINUX_IOMMU_H */