diff options
Diffstat (limited to 'include/rdma/ib_umem_odp.h')
| -rw-r--r-- | include/rdma/ib_umem_odp.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/rdma/ib_umem_odp.h b/include/rdma/ib_umem_odp.h index eeec4e53c448..479db5c98ff6 100644 --- a/include/rdma/ib_umem_odp.h +++ b/include/rdma/ib_umem_odp.h @@ -76,6 +76,7 @@ struct ib_umem_odp { struct completion notifier_completion; int dying; + unsigned int page_shift; struct work_struct work; }; @@ -84,6 +85,25 @@ static inline struct ib_umem_odp *to_ib_umem_odp(struct ib_umem *umem) return container_of(umem, struct ib_umem_odp, umem); } +/* Returns the first page of an ODP umem. */ +static inline unsigned long ib_umem_start(struct ib_umem_odp *umem_odp) +{ + return ALIGN_DOWN(umem_odp->umem.address, 1UL << umem_odp->page_shift); +} + +/* Returns the address of the page after the last one of an ODP umem. */ +static inline unsigned long ib_umem_end(struct ib_umem_odp *umem_odp) +{ + return ALIGN(umem_odp->umem.address + umem_odp->umem.length, + 1UL << umem_odp->page_shift); +} + +static inline size_t ib_umem_odp_num_pages(struct ib_umem_odp *umem_odp) +{ + return (ib_umem_end(umem_odp) - ib_umem_start(umem_odp)) >> + umem_odp->page_shift; +} + /* * The lower 2 bits of the DMA address signal the R/W permissions for * the entry. To upgrade the permissions, provide the appropriate |