IB/core: Introduce delay drop for a WQ (7d9336d8) · Commits · 戴 / test

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 <maorg@mellanox.com> Reviewed-by:

Yishai Hadas <yishaih@mellanox.com> Signed-off-by:

Leon Romanovsky <leon@kernel.org> Signed-off-by:

Doug Ledford <dledford@redhat.com>

include/rdma/ib_verbs.h

+5 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1546,6 +1546,10 @@ enum ib_raw_packet_caps {
	IB_RAW_PACKET_CAP_SCATTER_FCS = (1 << 1),		IB_RAW_PACKET_CAP_SCATTER_FCS = (1 << 1),
	/* Checksum offloads are supported (for both send and receive). */		/* Checksum offloads are supported (for both send and receive). */
	IB_RAW_PACKET_CAP_IP_CSUM = (1 << 2),		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 {		enum ib_wq_type {
	@@ -1574,6 +1578,7 @@ struct ib_wq {
	enum ib_wq_flags {		enum ib_wq_flags {
	IB_WQ_FLAGS_CVLAN_STRIPPING = 1 << 0,		IB_WQ_FLAGS_CVLAN_STRIPPING = 1 << 0,
	IB_WQ_FLAGS_SCATTER_FCS = 1 << 1,		IB_WQ_FLAGS_SCATTER_FCS = 1 << 1,
			IB_WQ_FLAGS_DELAY_DROP = 1 << 2,
	};		};

	struct ib_wq_init_attr {		struct ib_wq_init_attr {

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