ib_{uverbs/core}: add new ib_create_qp_ex with udata arg

Necessary to get device specific arguments through to XRC QPs.
Added new local header file to serve as support interface
between ib_core and ib_uverbs.

Right now there is a lot of duplicate setup code in uverbs_cmd.c
on the ib_uverbs side and verbs.c on the ib_core side. This commit
is a quick fix to have XRC support working, but similar calls
can be added to consolidate the code for other parts of the API.

Orabug: 20930262

Signed-off-by: Knut Omang <[email protected]>
Signed-off-by: Mukesh Kacker <[email protected]>

Author: Knut Omang

drivers/infiniband/core/core_priv.h

@@ -51,4 +51,9 @@ void ib_cache_cleanup(void);
 
 int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
 			    struct ib_qp_attr *qp_attr, int *qp_attr_mask);
+
+struct ib_qp *ib_create_qp_ex(struct ib_pd *pd,
+			struct ib_qp_init_attr *qp_init_attr,
+			struct ib_udata *udata);
+
 #endif /* _CORE_PRIV_H */

drivers/infiniband/core/uverbs_cmd.c

@@ -1722,7 +1722,7 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
 	INIT_LIST_HEAD(&obj->mcast_list);
 
 	if (cmd.qp_type == IB_QPT_XRC_TGT)
-		qp = ib_create_qp(pd, &attr);
+		qp = ib_create_qp_ex(pd, &attr, &udata);
 	else
 		qp = device->create_qp(pd, &attr, &udata);
 

drivers/infiniband/core/verbs.c

@@ -439,14 +439,15 @@ struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
 }
 EXPORT_SYMBOL(ib_open_qp);
 
-struct ib_qp *ib_create_qp(struct ib_pd *pd,
-			   struct ib_qp_init_attr *qp_init_attr)
+struct ib_qp *ib_create_qp_ex(struct ib_pd *pd,
+			struct ib_qp_init_attr *qp_init_attr,
+			struct ib_udata *udata)
 {
 	struct ib_qp *qp, *real_qp;
 	struct ib_device *device;
 
 	device = pd ? pd->device : qp_init_attr->xrcd->device;
-	qp = device->create_qp(pd, qp_init_attr, NULL);
+	qp = device->create_qp(pd, qp_init_attr, udata);
 
 	if (!IS_ERR(qp)) {
 		qp->device     = device;
@@ -497,6 +498,14 @@ struct ib_qp *ib_create_qp(struct ib_pd *pd,
 
 	return qp;
 }
+EXPORT_SYMBOL(ib_create_qp_ex);
+
+
+struct ib_qp *ib_create_qp(struct ib_pd *pd,
+			   struct ib_qp_init_attr *qp_init_attr)
+{
+	return ib_create_qp_ex(pd, qp_init_attr,NULL);
+}
 EXPORT_SYMBOL(ib_create_qp);
 
 static const struct {