[PATCH rdma-next 08/10] RDMA/uverbs: Add new relaxed ordering memory region access flag

Yishai Hadas
2020-01-08T18:06:19Z

From: Michael Guralnik <michaelgur@mellanox.com>

Adding new relaxed ordering access flag for memory regions.
Using memory regions with relaxed ordeing set can enhance performance.

This access flag is handled in a best-effort manner, drivers should
ignore if they don't support setting relaxed ordering.

Signed-off-by: Michael Guralnik <michaelgur@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
---
include/rdma/ib_verbs.h | 1 +
include/uapi/rdma/ib_user_ioctl_verbs.h | 1 +
2 files changed, 2 insertions(+)

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index ffb358f..2b3c16f 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1418,6 +1418,7 @@ enum ib_access_flags {
IB_ZERO_BASED = IB_UVERBS_ACCESS_ZERO_BASED,
IB_ACCESS_ON_DEMAND = IB_UVERBS_ACCESS_ON_DEMAND,
IB_ACCESS_HUGETLB = IB_UVERBS_ACCESS_HUGETLB,
+ IB_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_RELAXED_ORDERING,

IB_ACCESS_OPTIONAL = IB_UVERBS_ACCESS_OPTIONAL_RANGE,
IB_ACCESS_SUPPORTED =
diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h
index 76dbbd9..2a165f4 100644
--- a/include/uapi/rdma/ib_user_ioctl_verbs.h
+++ b/include/uapi/rdma/ib_user_ioctl_verbs.h
@@ -54,6 +54,7 @@ enum ib_uverbs_access_flags {
IB_UVERBS_ACCESS_ON_DEMAND = 1 << 6,
IB_UVERBS_ACCESS_HUGETLB = 1 << 7,

+ IB_UVERBS_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_OPTIONAL_FIRST,
IB_UVERBS_ACCESS_OPTIONAL_RANGE =
((IB_UVERBS_ACCESS_OPTIONAL_LAST << 1) - 1) &
~(IB_UVERBS_ACCESS_OPTIONAL_FIRST - 1)
--
1.8.3.1