diff options
Diffstat (limited to 'drivers/iommu/dma-iommu.c')
| -rw-r--r-- | drivers/iommu/dma-iommu.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 17dd683b2fce..9297b741f5e8 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -13,7 +13,6 @@ #include <linux/crash_dump.h> #include <linux/device.h> #include <linux/dma-direct.h> -#include <linux/dma-iommu.h> #include <linux/dma-map-ops.h> #include <linux/gfp.h> #include <linux/huge_mm.h> @@ -30,6 +29,8 @@ #include <linux/swiotlb.h> #include <linux/vmalloc.h> +#include "dma-iommu.h" + struct iommu_dma_msi_page { struct list_head list; dma_addr_t iova; @@ -1633,6 +1634,13 @@ out_free_page: return NULL; } +/** + * iommu_dma_prepare_msi() - Map the MSI page in the IOMMU domain + * @desc: MSI descriptor, will store the MSI page + * @msi_addr: MSI target address to be mapped + * + * Return: 0 on success or negative error code if the mapping failed. + */ int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr) { struct device *dev = msi_desc_to_dev(desc); @@ -1661,8 +1669,12 @@ int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr) return 0; } -void iommu_dma_compose_msi_msg(struct msi_desc *desc, - struct msi_msg *msg) +/** + * iommu_dma_compose_msi_msg() - Apply translation to an MSI message + * @desc: MSI descriptor prepared by iommu_dma_prepare_msi() + * @msg: MSI message containing target physical address + */ +void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg) { struct device *dev = msi_desc_to_dev(desc); const struct iommu_domain *domain = iommu_get_domain_for_dev(dev); |