2 files changed, 48 insertions, 0 deletions

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index af7a8b08b2e9..5e03ab78fc8e 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -920,3 +920,29 @@ int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
         return qp->device->detach_mcast(qp, gid, lid);
 }
 EXPORT_SYMBOL(ib_detach_mcast);
+
+struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
+{
+        struct ib_xrcd *xrcd;
+
+        if (!device->alloc_xrcd)
+                return ERR_PTR(-ENOSYS);
+
+        xrcd = device->alloc_xrcd(device, NULL, NULL);
+        if (!IS_ERR(xrcd)) {
+                xrcd->device = device;
+                atomic_set(&xrcd->usecnt, 0);
+        }
+
+        return xrcd;
+}
+EXPORT_SYMBOL(ib_alloc_xrcd);
+
+int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
+{
+        if (atomic_read(&xrcd->usecnt))
+                return -EBUSY;
+
+        return xrcd->device->dealloc_xrcd(xrcd);
+}
+EXPORT_SYMBOL(ib_dealloc_xrcd);
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 228be3e220d9..d2a5c9b991d1 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -112,6 +112,7 @@ enum ib_device_cap_flags {
          */
         IB_DEVICE_UD_IP_CSUM            = (1<<18),
         IB_DEVICE_UD_TSO                = (1<<19),
+        IB_DEVICE_XRC                   = (1<<20),
         IB_DEVICE_MEM_MGT_EXTENSIONS    = (1<<21),
         IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22),
 };
@@ -858,6 +859,11 @@ struct ib_pd {
         atomic_t                usecnt; /* count all resources */
 };
 
+struct ib_xrcd {
+        struct ib_device       *device;
+        atomic_t                usecnt; /* count all resources */
+};
+
 struct ib_ah {
         struct ib_device        *device;
         struct ib_pd            *pd;
@@ -1149,6 +1155,10 @@ struct ib_device {
                                                   struct ib_grh *in_grh,
                                                   struct ib_mad *in_mad,
                                                   struct ib_mad *out_mad);
+        struct ib_xrcd *           (*alloc_xrcd)(struct ib_device *device,
+                                                 struct ib_ucontext *ucontext,
+                                                 struct ib_udata *udata);
+        int                        (*dealloc_xrcd)(struct ib_xrcd *xrcd);
 
         struct ib_dma_mapping_ops   *dma_ops;
 
@@ -2060,4 +2070,16 @@ int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
  */
 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
 
+/**
+ * ib_alloc_xrcd - Allocates an XRC domain.
+ * @device: The device on which to allocate the XRC domain.
+ */
+struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device);
+
+/**
+ * ib_dealloc_xrcd - Deallocates an XRC domain.
+ * @xrcd: The XRC domain to deallocate.
+ */
+int ib_dealloc_xrcd(struct ib_xrcd *xrcd);
+
 #endif /* IB_VERBS_H */