IB/core: Support accessing SA in virtualized environment (a0c1b2a3) · Commits · 戴 / test

Per the ongoing standardisation process, when virtual HCAs are present in a network, traffic is routed based on a destination GID. In order to access the SA we use the well known SA GID. We also add a GRH required boolean field to the port attributes which is used to report to the verbs consumer whether this port is connected to a virtual network. We use this field to realize whether we need to create an address vector with GRH to access the subnet administrator. We clear the port attributes struct before calling the hardware driver to make sure the default remains that GRH is not required. Signed-off-by:

Eli Cohen <eli@mellanox.com> Reviewed-by:

Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by:

Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/sa_query.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -885,6 +885,11 @@ static void update_sm_ah(struct work_struct *work)
		ah_attr.dlid = port_attr.sm_lid;
		ah_attr.sl = port_attr.sm_sl;
		ah_attr.port_num = port->port_num;
		if (port_attr.grh_required) {
		ah_attr.ah_flags = IB_AH_GRH;
		ah_attr.grh.dgid.global.subnet_prefix = cpu_to_be64(port_attr.subnet_prefix);
		ah_attr.grh.dgid.global.interface_id = cpu_to_be64(IB_SA_WELL_KNOWN_GUID);
		}

		new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
		if (IS_ERR(new_ah->ah)) {

include/rdma/ib_verbs.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -97,6 +97,11 @@ enum rdma_node_type {
		RDMA_NODE_USNIC_UDP,
		};

		enum {
		/* set the local administered indication */
		IB_SA_WELL_KNOWN_GUID = BIT_ULL(57) \| 2,
		};

		enum rdma_transport_type {
		RDMA_TRANSPORT_IB,
		RDMA_TRANSPORT_IWARP,
		@@ -510,6 +515,7 @@ struct ib_port_attr {
		u8 active_width;
		u8 active_speed;
		u8 phys_state;
		bool grh_required;
		};

		enum ib_device_modify_flags {

Admin message