svn commit: r330494 - head/sys/ofed/drivers/infiniband/core

[Hans Petter Selasky]

Author: hselasky
Date: Mon Mar  5 11:58:37 2018
New Revision: 330494
URL: https://svnweb.freebsd.org/changeset/base/330494

Log:
  Select RoCEv2 by default in ibcore.
  
  MFC after:	1 week
  Sponsored by:	Mellanox Technologies

Modified:
  head/sys/ofed/drivers/infiniband/core/ib_cma.c

Modified: head/sys/ofed/drivers/infiniband/core/ib_cma.c
==============================================================================
--- head/sys/ofed/drivers/infiniband/core/ib_cma.c	Mon Mar  5 11:57:26 2018	(r330493)
+++ head/sys/ofed/drivers/infiniband/core/ib_cma.c	Mon Mar  5 11:58:37 2018	(r330494)
@@ -4137,7 +4137,6 @@ static void cma_add_one(struct ib_device *device)
 	struct cma_device *cma_dev;
 	struct rdma_id_private *id_priv;
 	unsigned int i;
-	unsigned long supported_gids = 0;
 
 	cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
 	if (!cma_dev)
@@ -4154,10 +4153,23 @@ static void cma_add_one(struct ib_device *device)
 		return;
 	}
 	for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
+		unsigned long supported_gids;
+		unsigned int default_gid_type;
+
 		supported_gids = roce_gid_type_mask_support(device, i);
-		WARN_ON(!supported_gids);
+
+		if (WARN_ON(!supported_gids)) {
+			/* set something valid */
+			default_gid_type = 0;
+		} else if (test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids)) {
+			/* prefer RoCEv2, if supported */
+			default_gid_type = IB_GID_TYPE_ROCE_UDP_ENCAP;
+		} else {
+			default_gid_type = find_first_bit(&supported_gids,
+			    BITS_PER_LONG);
+		}
 		cma_dev->default_gid_type[i - rdma_start_port(device)] =
-			find_first_bit(&supported_gids, BITS_PER_LONG);
+		    default_gid_type;
 	}
 
 	init_completion(&cma_dev->comp);