From 869ddcf8b351ace5bf8860f3cd6265dccb382426 Mon Sep 17 00:00:00 2001 From: Yonatan Cohen Date: Mon, 13 Nov 2017 10:51:13 +0200 Subject: IB/uverbs: Allow CQ moderation with modify CQ Uverbs support in modify_cq for CQ moderation only. Gives ability to change cq_max_count and cq_period. CQ moderation enhance performance by moderating the number of CQEs needed to create an event instead of application having to suffer from event per-CQE. To achieve CQ moderation the application needs to set cq_max_count and cq_period. cq_max_count - defines the number of CQEs needed to create an event. cq_period - defines the timeout (micro seconds) between last event and a new one that will occur even if cq_max_count was not satisfied Signed-off-by: Yonatan Cohen Reviewed-by: Majd Dibbiny Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- include/rdma/ib_verbs.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/rdma/ib_verbs.h') diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 0b671982bbb3..8e0d3780ce4e 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -311,6 +311,10 @@ struct ib_cq_init_attr { u32 flags; }; +enum ib_cq_attr_mask { + IB_CQ_MODERATE = 1 << 0, +}; + struct ib_device_attr { u64 fw_ver; __be64 sys_image_guid; -- cgit v1.2.3