RDMA/drivers: Convert easy drivers to use ib_device_set_netdev()

Drivers that never change their ndev dynamically do not need to use
the get_netdev callback.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Acked-by: Michal Kalderon <michal.kalderon@marvell.com>
Acked-by: Adit Ranadive <aditr@vmware.com>

drivers/infiniband/hw/bnxt_re/ib_verbs.c

@@ -119,21 +119,6 @@ static int bnxt_re_build_sgl(struct ib_sge *ib_sg_list,
 }
 
 /* Device */
-struct net_device *bnxt_re_get_netdev(struct ib_device *ibdev, u8 port_num)
-{
-	struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev);
-	struct net_device *netdev = NULL;
-
-	rcu_read_lock();
-	if (rdev)
-		netdev = rdev->netdev;
-	if (netdev)
-		dev_hold(netdev);
-
-	rcu_read_unlock();
-	return netdev;
-}
-
 int bnxt_re_query_device(struct ib_device *ibdev,
 			 struct ib_device_attr *ib_attr,
 			 struct ib_udata *udata)

drivers/infiniband/hw/bnxt_re/ib_verbs.h

@@ -142,8 +142,6 @@ struct bnxt_re_ucontext {
 	spinlock_t		sh_lock;	/* protect shpg */
 };
 
-struct net_device *bnxt_re_get_netdev(struct ib_device *ibdev, u8 port_num);
-
 int bnxt_re_query_device(struct ib_device *ibdev,
 			 struct ib_device_attr *ib_attr,
 			 struct ib_udata *udata);

drivers/infiniband/hw/bnxt_re/main.c

@@ -617,7 +617,6 @@ static const struct ib_device_ops bnxt_re_dev_ops = {
 	.get_dma_mr = bnxt_re_get_dma_mr,
 	.get_hw_stats = bnxt_re_ib_get_hw_stats,
 	.get_link_layer = bnxt_re_get_link_layer,
-	.get_netdev = bnxt_re_get_netdev,
 	.get_port_immutable = bnxt_re_get_port_immutable,
 	.map_mr_sg = bnxt_re_map_mr_sg,
 	.mmap = bnxt_re_mmap,
@@ -646,6 +645,7 @@ static const struct ib_device_ops bnxt_re_dev_ops = {
 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 {
 	struct ib_device *ibdev = &rdev->ibdev;
+	int ret;
 
 	/* ib device init */
 	ibdev->owner = THIS_MODULE;
@@ -693,6 +693,10 @@ static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 	rdma_set_device_sysfs_group(ibdev, &bnxt_re_dev_attr_group);
 	ibdev->driver_id = RDMA_DRIVER_BNXT_RE;
 	ib_set_device_ops(ibdev, &bnxt_re_dev_ops);
+	ret = ib_device_set_netdev(&rdev->ibdev, rdev->netdev, 1);
+	if (ret)
+		return ret;
+
 	return ib_register_device(ibdev, "bnxt_re%d");
 }
 

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -234,25 +234,6 @@ static int hns_roce_query_device(struct ib_device *ib_dev,
 	return 0;
 }
 
-static struct net_device *hns_roce_get_netdev(struct ib_device *ib_dev,
-					      u8 port_num)
-{
-	struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
-	struct net_device *ndev;
-
-	if (port_num < 1 || port_num > hr_dev->caps.num_ports)
-		return NULL;
-
-	rcu_read_lock();
-
-	ndev = hr_dev->iboe.netdevs[port_num - 1];
-	if (ndev)
-		dev_hold(ndev);
-
-	rcu_read_unlock();
-	return ndev;
-}
-
 static int hns_roce_query_port(struct ib_device *ib_dev, u8 port_num,
 			       struct ib_port_attr *props)
 {
@@ -458,7 +439,6 @@ static const struct ib_device_ops hns_roce_dev_ops = {
 	.fill_res_entry = hns_roce_fill_res_entry,
 	.get_dma_mr = hns_roce_get_dma_mr,
 	.get_link_layer = hns_roce_get_link_layer,
-	.get_netdev = hns_roce_get_netdev,
 	.get_port_immutable = hns_roce_port_immutable,
 	.mmap = hns_roce_mmap,
 	.modify_device = hns_roce_modify_device,
@@ -502,6 +482,7 @@ static int hns_roce_register_device(struct hns_roce_dev *hr_dev)
 	struct hns_roce_ib_iboe *iboe = NULL;
 	struct ib_device *ib_dev = NULL;
 	struct device *dev = hr_dev->dev;
+	unsigned int i;
 
 	iboe = &hr_dev->iboe;
 	spin_lock_init(&iboe->lock);
@@ -567,6 +548,15 @@ static int hns_roce_register_device(struct hns_roce_dev *hr_dev)
 	ib_dev->driver_id = RDMA_DRIVER_HNS;
 	ib_set_device_ops(ib_dev, hr_dev->hw->hns_roce_dev_ops);
 	ib_set_device_ops(ib_dev, &hns_roce_dev_ops);
+	for (i = 0; i < hr_dev->caps.num_ports; i++) {
+		if (!hr_dev->iboe.netdevs[i])
+			continue;
+
+		ret = ib_device_set_netdev(ib_dev, hr_dev->iboe.netdevs[i],
+					   i + 1);
+		if (ret)
+			return ret;
+	}
 	ret = ib_register_device(ib_dev, "hns_%d");
 	if (ret) {
 		dev_err(dev, "ib_register_device failed!\n");

drivers/infiniband/hw/ocrdma/ocrdma_main.c

@@ -161,7 +161,6 @@ static const struct ib_device_ops ocrdma_dev_ops = {
 	.get_dev_fw_str = get_dev_fw_str,
 	.get_dma_mr = ocrdma_get_dma_mr,
 	.get_link_layer = ocrdma_link_layer,
-	.get_netdev = ocrdma_get_netdev,
 	.get_port_immutable = ocrdma_port_immutable,
 	.map_mr_sg = ocrdma_map_mr_sg,
 	.mmap = ocrdma_mmap,
@@ -197,6 +196,8 @@ static const struct ib_device_ops ocrdma_dev_srq_ops = {
 
 static int ocrdma_register_device(struct ocrdma_dev *dev)
 {
+	int ret;
+
 	ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 	BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
 	memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
@@ -251,6 +252,10 @@ static int ocrdma_register_device(struct ocrdma_dev *dev)
 	}
 	rdma_set_device_sysfs_group(&dev->ibdev, &ocrdma_attr_group);
 	dev->ibdev.driver_id = RDMA_DRIVER_OCRDMA;
+	ret = ib_device_set_netdev(&dev->ibdev, dev->nic_info.netdev, 1);
+	if (ret)
+		return ret;
+
 	return ib_register_device(&dev->ibdev, "ocrdma%d");
 }
 
@@ -308,6 +313,7 @@ static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 		pr_err("Unable to allocate ib device\n");
 		return NULL;
 	}
+
 	dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 	if (!dev->mbx_cmd)
 		goto idr_err;

drivers/infiniband/hw/ocrdma/ocrdma_verbs.c

@@ -113,24 +113,6 @@ int ocrdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr,
 	return 0;
 }
 
-struct net_device *ocrdma_get_netdev(struct ib_device *ibdev, u8 port_num)
-{
-	struct ocrdma_dev *dev;
-	struct net_device *ndev = NULL;
-
-	rcu_read_lock();
-
-	dev = get_ocrdma_dev(ibdev);
-	if (dev)
-		ndev = dev->nic_info.netdev;
-	if (ndev)
-		dev_hold(ndev);
-
-	rcu_read_unlock();
-
-	return ndev;
-}
-
 static inline void get_link_speed_and_width(struct ocrdma_dev *dev,
 					    u8 *ib_speed, u8 *ib_width)
 {

drivers/infiniband/hw/ocrdma/ocrdma_verbs.h

@@ -61,7 +61,6 @@ enum rdma_protocol_type
 ocrdma_query_protocol(struct ib_device *device, u8 port_num);
 
 void ocrdma_get_guid(struct ocrdma_dev *, u8 *guid);
-struct net_device *ocrdma_get_netdev(struct ib_device *device, u8 port_num);
 int ocrdma_query_pkey(struct ib_device *, u8 port, u16 index, u16 *pkey);
 
 int ocrdma_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata);

drivers/infiniband/hw/qedr/main.c

@@ -81,20 +81,6 @@ static void qedr_get_dev_fw_str(struct ib_device *ibdev, char *str)
 		 (fw_ver >> 8) & 0xFF, fw_ver & 0xFF);
 }
 
-static struct net_device *qedr_get_netdev(struct ib_device *dev, u8 port_num)
-{
-	struct qedr_dev *qdev;
-
-	qdev = get_qedr_dev(dev);
-	dev_hold(qdev->ndev);
-
-	/* The HW vendor's device driver must guarantee
-	 * that this function returns NULL before the net device has finished
-	 * NETDEV_UNREGISTER state.
-	 */
-	return qdev->ndev;
-}
-
 static int qedr_roce_port_immutable(struct ib_device *ibdev, u8 port_num,
 				    struct ib_port_immutable *immutable)
 {
@@ -219,7 +205,6 @@ static const struct ib_device_ops qedr_dev_ops = {
 	.get_dev_fw_str = qedr_get_dev_fw_str,
 	.get_dma_mr = qedr_get_dma_mr,
 	.get_link_layer = qedr_link_layer,
-	.get_netdev = qedr_get_netdev,
 	.map_mr_sg = qedr_map_mr_sg,
 	.mmap = qedr_mmap,
 	.modify_port = qedr_modify_port,
@@ -295,6 +280,10 @@ static int qedr_register_device(struct qedr_dev *dev)
 	ib_set_device_ops(&dev->ibdev, &qedr_dev_ops);
 
 	dev->ibdev.driver_id = RDMA_DRIVER_QEDR;
+	rc = ib_device_set_netdev(&dev->ibdev, dev->ndev, 1);
+	if (rc)
+		return rc;
+
 	return ib_register_device(&dev->ibdev, "qedr%d");
 }
 

drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c

@@ -143,24 +143,6 @@ static int pvrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
 	return 0;
 }
 
-static struct net_device *pvrdma_get_netdev(struct ib_device *ibdev,
-					    u8 port_num)
-{
-	struct net_device *netdev;
-	struct pvrdma_dev *dev = to_vdev(ibdev);
-
-	if (port_num != 1)
-		return NULL;
-
-	rcu_read_lock();
-	netdev = dev->netdev;
-	if (netdev)
-		dev_hold(netdev);
-	rcu_read_unlock();
-
-	return netdev;
-}
-
 static const struct ib_device_ops pvrdma_dev_ops = {
 	.add_gid = pvrdma_add_gid,
 	.alloc_mr = pvrdma_alloc_mr,
@@ -179,7 +161,6 @@ static const struct ib_device_ops pvrdma_dev_ops = {
 	.get_dev_fw_str = pvrdma_get_fw_ver_str,
 	.get_dma_mr = pvrdma_get_dma_mr,
 	.get_link_layer = pvrdma_port_link_layer,
-	.get_netdev = pvrdma_get_netdev,
 	.get_port_immutable = pvrdma_port_immutable,
 	.map_mr_sg = pvrdma_map_mr_sg,
 	.mmap = pvrdma_mmap,
@@ -281,6 +262,9 @@ static int pvrdma_register_device(struct pvrdma_dev *dev)
 			goto err_qp_free;
 	}
 	dev->ib_dev.driver_id = RDMA_DRIVER_VMW_PVRDMA;
+	ret = ib_device_set_netdev(&dev->ib_dev, dev->netdev, 1);
+	if (ret)
+		return ret;
 	spin_lock_init(&dev->srq_tbl_lock);
 	rdma_set_device_sysfs_group(&dev->ib_dev, &pvrdma_attr_group);
 
@@ -724,6 +708,7 @@ static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 			pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 		break;
 	case NETDEV_UNREGISTER:
+		ib_device_set_netdev(&dev->ib_dev, NULL, 1);
 		dev_put(dev->netdev);
 		dev->netdev = NULL;
 		break;
@@ -735,6 +720,7 @@ static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 		if ((dev->netdev == NULL) &&
 		    (pci_get_drvdata(pdev_net) == ndev)) {
 			/* this is our netdev */
+			ib_device_set_netdev(&dev->ib_dev, ndev, 1);
 			dev->netdev = ndev;
 			dev_hold(ndev);
 		}