leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

RDMA/mlx5: Enable Relaxed Ordering by default for kernel ULPs

Browse Source 
Relaxed Ordering is a capability that can only benefit users that support
it. All kernel ULPs should support Relaxed Ordering, as they are designed
to read data only after observing the CQE and use the DMA API correctly.

Hence, implicitly enable Relaxed Ordering by default for MR transfers in
kernel ULPs.

Link: https://lore.kernel.org/r/b7e820aab7402b8efa63605f4ea465831b3b1e5e.1623236426.git.leonro@nvidia.com
Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Avihai Horon
2021-06-09 14:05:03 +03:00
committed by Jason Gunthorpe
parent 7e78dd816e
commit 1477d44ce4
3 changed files with 18 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/rdma/ib_verbs.h
View File

@@ -2468,6 +2468,14 @@ struct ib_device_ops {
enum ib_uverbs_advise_mr_advice advice, u32 flags,
struct ib_sge *sg_list, u32 num_sge,
struct uverbs_attr_bundle *attrs);
/*
* Kernel users should universally support relaxed ordering (RO), as
* they are designed to read data only after observing the CQE and use
* the DMA API correctly.
*
* Some drivers implicitly enable RO if platform supports it.
*/
int (*map_mr_sg)(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
unsigned int *sg_offset);
int (*check_mr_status)(struct ib_mr *mr, u32 check_mask,