From: Eli Cohen Date: Fri, 11 Mar 2016 20:58:37 +0000 (+0200) Subject: IB/core: Support accessing SA in virtualized environment X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a0c1b2a3508714281f604db818fa0cc83c2f9b6a;p=linux-beck.git IB/core: Support accessing SA in virtualized environment 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 Reviewed-by: Or Gerlitz Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c index 8e3bf6c8d3c3..d2214a55ac4a 100644 --- a/drivers/infiniband/core/sa_query.c +++ b/drivers/infiniband/core/sa_query.c @@ -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)) { diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 7239b9a4499e..3a5a66b7a33f 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -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 {