diff options
Diffstat (limited to 'include/rdma/ib_verbs.h')
| -rw-r--r-- | include/rdma/ib_verbs.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 949cf4ffc536..1e7774ac808f 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -4036,6 +4036,31 @@ static inline bool ib_dma_pci_p2p_dma_supported(struct ib_device *dev) } /** + * ib_virt_dma_to_ptr - Convert a dma_addr to a kernel pointer + * @dma_addr: The DMA address + * + * Used by ib_uses_virt_dma() devices to get back to the kernel pointer after + * going through the dma_addr marshalling. + */ +static inline void *ib_virt_dma_to_ptr(u64 dma_addr) +{ + /* virt_dma mode maps the kvs's directly into the dma addr */ + return (void *)(uintptr_t)dma_addr; +} + +/** + * ib_virt_dma_to_page - Convert a dma_addr to a struct page + * @dma_addr: The DMA address + * + * Used by ib_uses_virt_dma() device to get back to the struct page after going + * through the dma_addr marshalling. + */ +static inline struct page *ib_virt_dma_to_page(u64 dma_addr) +{ + return virt_to_page(ib_virt_dma_to_ptr(dma_addr)); +} + +/** * ib_dma_mapping_error - check a DMA addr for error * @dev: The device for which the dma_addr was created * @dma_addr: The DMA address to check |