OFED: migrate LinuxKPI net_device/ifnet macros into ofed

The LinuxKPI net_device actually is an ifnet; in order to further
clean that up so we can extend "net_device" migrate the few macros
left into ofed and make sure the header is included in all files
which need access to the macros.

Sponsored by:	The FreeBSD Foundation
MFC after:	12 days
Reviewed by:	kib
Differential Revision: https://reviews.freebsd.org/D30477

sys/ofed/drivers/infiniband/core/ib_cache.c

@@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$");
 #include <linux/netdevice.h>
 #include <linux/in6.h>
 
+#include <rdma/ib_addr.h>
 #include <rdma/ib_cache.h>
 
 #include "core_priv.h"

sys/ofed/drivers/infiniband/core/ib_cm.c

@@ -56,6 +56,7 @@ __FBSDID("$FreeBSD$");
 
 #include <asm/atomic-long.h>
 
+#include <rdma/ib_addr.h>
 #include <rdma/ib_cache.h>
 #include <rdma/ib_cm.h>
 #include "cm_msgs.h"

sys/ofed/drivers/infiniband/core/ib_sysfs.c

@@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$");
 #include <linux/fs.h>
 #include <linux/printk.h>
 
+#include <rdma/ib_addr.h>
 #include <rdma/ib_mad.h>
 #include <rdma/ib_pma.h>
 

sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c

@@ -50,6 +50,7 @@ __FBSDID("$FreeBSD$");
 
 #include <net/infiniband.h>
 
+#include <rdma/ib_addr.h>
 #include <rdma/ib_cache.h>
 
 MODULE_AUTHOR("Roland Dreier");

sys/ofed/include/rdma/ib_addr.h

@@ -51,6 +51,13 @@
 #include <rdma/ib_pack.h>
 #include <rdma/ib_addr_freebsd.h>
 
+/* Linux netdevice.h but for working on an ifnet rather than a net_device. */
+#define	dev_hold(d)	if_ref(d)
+#define	dev_put(d)	if_rele(d)
+#define	dev_net(d)	((d)->if_vnet)
+#define	net_eq(a,b)	((a) == (b))
+
+
 struct rdma_addr_client {
 	atomic_t refcount;
 	struct completion comp;