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| author | Shiraz Saleem <shiraz.saleem@intel.com> | 2019-05-06 08:53:32 -0500 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-05-06 13:08:11 -0300 |
| commit | 4a35339958f16d42a4ca06a8da9d4b5ab39ee8ea (patch) | |
| tree | 5ac8683e8ff5329f7c5868cf44c0f6cbfa47f24e /include/rdma/ib_umem.h | |
| parent | 4c4b1996b5db688e2dcb8242b0a3bf7b1e845e42 (diff) | |
| download | lwn-4a35339958f16d42a4ca06a8da9d4b5ab39ee8ea.tar.gz lwn-4a35339958f16d42a4ca06a8da9d4b5ab39ee8ea.zip | |
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.h | 9 |
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 */ |