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authorEli Cohen <eli@mellanox.com>2016-03-11 23:58:37 +0300
committerDoug Ledford <dledford@redhat.com>2016-03-21 23:34:06 +0300
commita0c1b2a3508714281f604db818fa0cc83c2f9b6a (patch)
tree22388370391416e1535a45b1d0fe89205a7ade03 /drivers/infiniband/core
parentfad61ad4e755f5dd13c7702a87cd907207392534 (diff)
downloadlinux-a0c1b2a3508714281f604db818fa0cc83c2f9b6a.tar.xz
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 <eli@mellanox.com> Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core')
-rw-r--r--drivers/infiniband/core/sa_query.c5
1 files changed, 5 insertions, 0 deletions
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)) {