From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eli Cohen Subject: [PATCH rdma-next V3 04/10] IB/core: Support accessing SA in virtualized environment Date: Fri, 11 Mar 2016 22:58:37 +0200 Message-ID: <1457729923-4526-5-git-send-email-eli@mellanox.com> References: <1457729923-4526-1-git-send-email-eli@mellanox.com> Return-path: In-Reply-To: <1457729923-4526-1-git-send-email-eli-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Eli Cohen List-Id: linux-rdma@vger.kernel.org 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 --- Changes from V2: Modify the definition of IB_SA_WELL_KNOWN_GUID to be locally adminitered GUID drivers/infiniband/core/sa_query.c | 5 +++++ include/rdma/ib_verbs.h | 6 ++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c index f334090bb612..4fb97df2caa5 100644 --- a/drivers/infiniband/core/sa_query.c +++ b/drivers/infiniband/core/sa_query.c @@ -886,6 +886,11 @@ 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 da4af77f6add..c6f241ec5e91 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 { -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html