IB/qib: Remove create qp and create qp table functionality

Rely on rdmavt functions for creation of qp and qp table.  Function to
allocate a qpn is still being provided by qib as the algorithm to allocate
a qpn in qib is different from that of the algorithm in rdmavt.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/qib/qib_verbs.c

@@ -1904,29 +1904,11 @@ int qib_register_ib_device(struct qib_devdata *dd)
 	unsigned i, ctxt;
 	int ret;
 
-	/* allocate parent object */
-	dev->rdi.qp_dev = kzalloc(sizeof(*dev->rdi.qp_dev), GFP_KERNEL);
-	if (!dev->rdi.qp_dev)
-		return -ENOMEM;
-	dev->rdi.qp_dev->qp_table_size = ib_qib_qp_table_size;
-	dev->rdi.qp_dev->qp_table_bits = ilog2(ib_qib_qp_table_size);
 	get_random_bytes(&dev->qp_rnd, sizeof(dev->qp_rnd));
-	dev->rdi.qp_dev->qp_table = kmalloc_array(
-				dev->rdi.qp_dev->qp_table_size,
-				sizeof(*dev->rdi.qp_dev->qp_table),
-				GFP_KERNEL);
-	if (!dev->rdi.qp_dev->qp_table) {
-		ret = -ENOMEM;
-		goto err_qpt;
-	}
-	for (i = 0; i < dev->rdi.qp_dev->qp_table_size; i++)
-		RCU_INIT_POINTER(dev->rdi.qp_dev->qp_table[i], NULL);
-
 	for (i = 0; i < dd->num_pports; i++)
 		init_ibport(ppd + i);
 
 	/* Only need to initialize non-zero fields. */
-	spin_lock_init(&dev->rdi.qp_dev->qpt_lock);
 	spin_lock_init(&dev->n_cqs_lock);
 	spin_lock_init(&dev->n_qps_lock);
 	spin_lock_init(&dev->n_srqs_lock);
@@ -1935,7 +1917,7 @@ int qib_register_ib_device(struct qib_devdata *dd)
 	dev->mem_timer.function = mem_timer;
 	dev->mem_timer.data = (unsigned long) dev;
 
-	qib_init_qpn_table(dd, &dev->rdi.qp_dev->qpn_table);
+	qpt_mask = dd->qpn_mask;
 
 	INIT_LIST_HEAD(&dev->piowait);
 	INIT_LIST_HEAD(&dev->dmawait);
@@ -2032,7 +2014,7 @@ int qib_register_ib_device(struct qib_devdata *dd)
 	ibdev->modify_srq = qib_modify_srq;
 	ibdev->query_srq = qib_query_srq;
 	ibdev->destroy_srq = qib_destroy_srq;
-	ibdev->create_qp = qib_create_qp;
+	ibdev->create_qp = NULL;
 	ibdev->modify_qp = qib_modify_qp;
 	ibdev->query_qp = qib_query_qp;
 	ibdev->destroy_qp = qib_destroy_qp;
@@ -2071,9 +2053,21 @@ int qib_register_ib_device(struct qib_devdata *dd)
 	dd->verbs_dev.rdi.driver_f.get_pci_dev = qib_get_pci_dev;
 	dd->verbs_dev.rdi.driver_f.check_ah = qib_check_ah;
 	dd->verbs_dev.rdi.driver_f.notify_new_ah = qib_notify_new_ah;
-	dd->verbs_dev.rdi.flags = (RVT_FLAG_QP_INIT_DRIVER |
-				   RVT_FLAG_CQ_INIT_DRIVER);
+	dd->verbs_dev.rdi.driver_f.alloc_qpn = alloc_qpn;
+	dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qp_priv_alloc;
+	dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free;
+	dd->verbs_dev.rdi.driver_f.free_all_qps = qib_free_all_qps;
+	dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
+
+	dd->verbs_dev.rdi.flags = RVT_FLAG_CQ_INIT_DRIVER;
+
 	dd->verbs_dev.rdi.dparms.lkey_table_size = qib_lkey_table_size;
+	dd->verbs_dev.rdi.dparms.qp_table_size = ib_qib_qp_table_size;
+	dd->verbs_dev.rdi.dparms.qpn_start = 1;
+	dd->verbs_dev.rdi.dparms.qpn_res_start = QIB_KD_QP;
+	dd->verbs_dev.rdi.dparms.qpn_res_end = QIB_KD_QP; /* Reserve one QP */
+	dd->verbs_dev.rdi.dparms.qpn_inc = 1;
+	dd->verbs_dev.rdi.dparms.qos_shift = 1;
 	dd->verbs_dev.rdi.dparms.nports = dd->num_pports;
 	dd->verbs_dev.rdi.dparms.npkeys = qib_get_npkeys(dd);
 
@@ -2122,8 +2116,6 @@ err_tx:
 					sizeof(struct qib_pio_header),
 				  dev->pio_hdrs, dev->pio_hdrs_phys);
 err_hdrs:
-	kfree(dev->rdi.qp_dev->qp_table);
-err_qpt:
 	qib_dev_err(dd, "cannot register verbs: %d!\n", -ret);
 bail:
 	return ret;
@@ -2132,7 +2124,6 @@ bail:
 void qib_unregister_ib_device(struct qib_devdata *dd)
 {
 	struct qib_ibdev *dev = &dd->verbs_dev;
-	u32 qps_inuse;
 
 	qib_verbs_unregister_sysfs(dd);
 
@@ -2149,13 +2140,7 @@ void qib_unregister_ib_device(struct qib_devdata *dd)
 	if (!list_empty(&dev->memwait))
 		qib_dev_err(dd, "memwait list not empty!\n");
 
-	qps_inuse = qib_free_all_qps(dd);
-	if (qps_inuse)
-		qib_dev_err(dd, "QP memory leak! %u still in use\n",
-			    qps_inuse);
-
 	del_timer_sync(&dev->mem_timer);
-	qib_free_qpn_table(&dev->rdi.qp_dev->qpn_table);
 	while (!list_empty(&dev->txreq_free)) {
 		struct list_head *l = dev->txreq_free.next;
 		struct qib_verbs_txreq *tx;
@@ -2169,7 +2154,6 @@ void qib_unregister_ib_device(struct qib_devdata *dd)
 				  dd->pport->sdma_descq_cnt *
 					sizeof(struct qib_pio_header),
 				  dev->pio_hdrs, dev->pio_hdrs_phys);
-	kfree(dev->rdi.qp_dev->qp_table);
 }
 
 /*