[PATCH v3 24/28] IB/Verbs: Use management helper cap_ib_cm_dev()

[Michael Wang <yun.wang@profitbricks.com>]

Introduce helper cap_ib_cm_dev() to help us check if any port of
an IB device has the capability Infiniband Communication Manager.

Cc: Steve Wise <swise@opengridcomputing.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
---
 drivers/infiniband/core/cma.c |  5 ++---
 drivers/infiniband/core/ucm.c |  3 +--
 include/rdma/ib_verbs.h       | 20 ++++++++++++++++++++
 3 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 4ed582e..65e41f4 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -1639,8 +1639,7 @@ static void cma_listen_on_dev(struct rdma_id_private *id_priv,
 	struct rdma_cm_id *id;
 	int ret;
 
-	if (cma_family(id_priv) == AF_IB &&
-	    rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB)
+	if (cma_family(id_priv) == AF_IB && !cap_ib_cm_dev(cma_dev->device))
 		return;
 
 	id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
@@ -2031,7 +2030,7 @@ static int cma_bind_loopback(struct rdma_id_private *id_priv)
 	mutex_lock(&lock);
 	list_for_each_entry(cur_dev, &dev_list, list) {
 		if (cma_family(id_priv) == AF_IB &&
-		    rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
+		    !cap_ib_cm_dev(cur_dev->device))
 			continue;
 
 		if (!cma_dev)
diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index f2f6393..065405e 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -1253,8 +1253,7 @@ static void ib_ucm_add_one(struct ib_device *device)
 	dev_t base;
 	struct ib_ucm_device *ucm_dev;
 
-	if (!device->alloc_ucontext ||
-	    rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
+	if (!device->alloc_ucontext || !cap_ib_cm_dev(device))
 		return;
 
 	ucm_dev = kzalloc(sizeof *ucm_dev, GFP_KERNEL);
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 60f7efb..29ddd14 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1893,6 +1893,26 @@ static inline int cap_read_multi_sge(struct ib_device *device, u8 port_num)
 	return !rdma_tech_iwarp(device, port_num);
 }
 
+/**
+ * cap_ib_cm_dev - Check if any port of device has the capability Infiniband
+ * Communication Manager.
+ *
+ * @device: Device to be checked
+ *
+ * Return 0 when all port of the device don't support Infiniband
+ * Communication Manager.
+ */
+static inline int cap_ib_cm_dev(struct ib_device *device)
+{
+	int i;
+
+	for (i = 1; i <= device->phys_port_cnt; i++) {
+		if (cap_ib_cm(device, i))
+			return 1;
+	}
+	return 0;
+}
+
 int ib_query_gid(struct ib_device *device,
 		 u8 port_num, int index, union ib_gid *gid);
 
-- 
2.1.0