From 7d9336d80b0b35d3537d37ff35e08dcb425073ed Mon Sep 17 00:00:00 2001 From: Maor Gottlieb Date: Tue, 30 May 2017 10:29:10 +0300 Subject: [PATCH] IB/core: Introduce delay drop for a WQ Work queue which is created with IB_WQ_FLAGS_DELAY_DROP won't cause packet drops when there aren't receive WQEs, but will wait until posting of receive WQEs or for some period of time that the device was configured with. It includes: * Add a new creation flag to enable delay drop functionality in a WQ. * A new capability was introduced - IB_RAW_PACKET_CAP_DELAY_DROP, which is the device's ability to delay packet drops when there aren't receive WQEs. Signed-off-by: Maor Gottlieb Reviewed-by: Yishai Hadas Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- include/rdma/ib_verbs.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index b5732432bb29..4a1444456af7 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1546,6 +1546,10 @@ enum ib_raw_packet_caps { IB_RAW_PACKET_CAP_SCATTER_FCS = (1 << 1), /* Checksum offloads are supported (for both send and receive). */ IB_RAW_PACKET_CAP_IP_CSUM = (1 << 2), + /* When a packet is received for an RQ with no receive WQEs, the + * packet processing is delayed. + */ + IB_RAW_PACKET_CAP_DELAY_DROP = (1 << 3), }; enum ib_wq_type { @@ -1574,6 +1578,7 @@ struct ib_wq { enum ib_wq_flags { IB_WQ_FLAGS_CVLAN_STRIPPING = 1 << 0, IB_WQ_FLAGS_SCATTER_FCS = 1 << 1, + IB_WQ_FLAGS_DELAY_DROP = 1 << 2, }; struct ib_wq_init_attr { -- 2.20.1