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authorShiraz Saleem <shiraz.saleem@intel.com>2019-05-06 16:53:32 +0300
committerJason Gunthorpe <jgg@mellanox.com>2019-05-06 19:08:11 +0300
commit4a35339958f16d42a4ca06a8da9d4b5ab39ee8ea (patch)
tree5ac8683e8ff5329f7c5868cf44c0f6cbfa47f24e /include/rdma/ib_umem.h
parent4c4b1996b5db688e2dcb8242b0a3bf7b1e845e42 (diff)
downloadlinux-4a35339958f16d42a4ca06a8da9d4b5ab39ee8ea.tar.xz
RDMA/umem: Add API to find best driver supported page size in an MR
This helper iterates through the SG list to find the best page size to use from a bitmap of HW supported page sizes. Drivers that support multiple page sizes, but not mixed sizes in an MR can use this API. Suggested-by: Jason Gunthorpe <jgg@ziepe.ca> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/rdma/ib_umem.h')
-rw-r--r--include/rdma/ib_umem.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h
index b13a2e9a50d4..917b687010f0 100644
--- a/include/rdma/ib_umem.h
+++ b/include/rdma/ib_umem.h
@@ -87,6 +87,9 @@ void ib_umem_release(struct ib_umem *umem);
int ib_umem_page_count(struct ib_umem *umem);
int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
size_t length);
+unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
+ unsigned long pgsz_bitmap,
+ unsigned long virt);
#else /* CONFIG_INFINIBAND_USER_MEM */
@@ -104,6 +107,12 @@ static inline int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offs
size_t length) {
return -EINVAL;
}
+static inline int ib_umem_find_best_pgsz(struct ib_umem *umem,
+ unsigned long pgsz_bitmap,
+ unsigned long virt) {
+ return -EINVAL;
+}
+
#endif /* CONFIG_INFINIBAND_USER_MEM */
#endif /* IB_UMEM_H */