diff options
Diffstat (limited to 'include/rdma/ib_umem.h')
| -rw-r--r-- | include/rdma/ib_umem.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h index a2bf41e0bde9..7ed6d4ff58dc 100644 --- a/include/rdma/ib_umem.h +++ b/include/rdma/ib_umem.h @@ -42,7 +42,7 @@ struct ib_ucontext; struct ib_umem { struct ib_ucontext *context; size_t length; - int offset; + unsigned long address; int page_size; int writable; int hugetlb; @@ -55,6 +55,29 @@ struct ib_umem { int npages; }; +/* Returns the offset of the umem start relative to the first page. */ +static inline int ib_umem_offset(struct ib_umem *umem) +{ + return umem->address & ((unsigned long)umem->page_size - 1); +} + +/* Returns the first page of an ODP umem. */ +static inline unsigned long ib_umem_start(struct ib_umem *umem) +{ + return umem->address - ib_umem_offset(umem); +} + +/* Returns the address of the page after the last one of an ODP umem. */ +static inline unsigned long ib_umem_end(struct ib_umem *umem) +{ + return PAGE_ALIGN(umem->address + umem->length); +} + +static inline size_t ib_umem_num_pages(struct ib_umem *umem) +{ + return (ib_umem_end(umem) - ib_umem_start(umem)) >> PAGE_SHIFT; +} + #ifdef CONFIG_INFINIBAND_USER_MEM struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, |