RDMA/providers: Simplify query_gid callback of RoCE providers

ib_query_gid() fetches the GID from the software cache maintained in
ib_core for RoCE ports.

Therefore, simplify the provider drivers for RoCE to treat query_gid()
callback as never called for RoCE, and only require non-RoCE devices to
implement it.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/device.c

@@ -103,7 +103,6 @@ static int ib_device_check_mandatory(struct ib_device *device)
 		IB_MANDATORY_FUNC(query_device),
 		IB_MANDATORY_FUNC(query_port),
 		IB_MANDATORY_FUNC(query_pkey),
-		IB_MANDATORY_FUNC(query_gid),
 		IB_MANDATORY_FUNC(alloc_pd),
 		IB_MANDATORY_FUNC(dealloc_pd),
 		IB_MANDATORY_FUNC(create_ah),
@@ -884,6 +883,9 @@ int ib_query_gid(struct ib_device *device,
 	if (attr)
 		return -EINVAL;
 
+	if (!device->query_gid)
+		return -EOPNOTSUPP;
+
 	return device->query_gid(device, port_num, index, gid);
 }
 EXPORT_SYMBOL(ib_query_gid);

drivers/infiniband/hw/bnxt_re/main.c

@@ -574,7 +574,6 @@ static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
 	ibdev->get_port_immutable	= bnxt_re_get_port_immutable;
 	ibdev->get_dev_fw_str           = bnxt_re_query_fw_str;
 	ibdev->query_pkey		= bnxt_re_query_pkey;
-	ibdev->query_gid		= bnxt_re_query_gid;
 	ibdev->get_netdev		= bnxt_re_get_netdev;
 	ibdev->add_gid			= bnxt_re_add_gid;
 	ibdev->del_gid			= bnxt_re_del_gid;

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -296,12 +296,6 @@ static enum rdma_link_layer hns_roce_get_link_layer(struct ib_device *device,
 	return IB_LINK_LAYER_ETHERNET;
 }
 
-static int hns_roce_query_gid(struct ib_device *ib_dev, u8 port_num, int index,
-			      union ib_gid *gid)
-{
-	return 0;
-}
-
 static int hns_roce_query_pkey(struct ib_device *ib_dev, u8 port, u16 index,
 			       u16 *pkey)
 {
@@ -482,7 +476,6 @@ static int hns_roce_register_device(struct hns_roce_dev *hr_dev)
 	ib_dev->modify_port		= hns_roce_modify_port;
 	ib_dev->get_link_layer		= hns_roce_get_link_layer;
 	ib_dev->get_netdev		= hns_roce_get_netdev;
-	ib_dev->query_gid		= hns_roce_query_gid;
 	ib_dev->add_gid			= hns_roce_add_gid;
 	ib_dev->del_gid			= hns_roce_del_gid;
 	ib_dev->query_pkey		= hns_roce_query_pkey;

drivers/infiniband/hw/mlx4/main.c

@@ -888,24 +888,9 @@ int __mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
 			     union ib_gid *gid)
 {
-	int ret;
-
 	if (rdma_protocol_ib(ibdev, port))
 		return __mlx4_ib_query_gid(ibdev, port, index, gid, 0);
-
-	if (!rdma_protocol_roce(ibdev, port))
-		return -ENODEV;
-
-	if (!rdma_cap_roce_gid_table(ibdev, port))
-		return -ENODEV;
-
-	ret = ib_get_cached_gid(ibdev, port, index, gid, NULL);
-	if (ret == -EAGAIN) {
-		memcpy(gid, &zgid, sizeof(*gid));
-		return 0;
-	}
-
-	return ret;
+	return 0;
 }
 
 static int mlx4_ib_query_sl2vl(struct ib_device *ibdev, u8 port, u64 *sl2vl_tbl)

drivers/infiniband/hw/ocrdma/ocrdma_main.c

@@ -158,7 +158,6 @@ static int ocrdma_register_device(struct ocrdma_dev *dev)
 	dev->ibdev.query_device = ocrdma_query_device;
 	dev->ibdev.query_port = ocrdma_query_port;
 	dev->ibdev.modify_port = ocrdma_modify_port;
-	dev->ibdev.query_gid = ocrdma_query_gid;
 	dev->ibdev.get_netdev = ocrdma_get_netdev;
 	dev->ibdev.get_link_layer = ocrdma_link_layer;
 	dev->ibdev.alloc_pd = ocrdma_alloc_pd;

drivers/infiniband/hw/ocrdma/ocrdma_verbs.c

@@ -62,24 +62,6 @@ int ocrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 	return 0;
 }
 
-int ocrdma_query_gid(struct ib_device *ibdev, u8 port,
-		     int index, union ib_gid *sgid)
-{
-	int ret;
-
-	memset(sgid, 0, sizeof(*sgid));
-	if (index >= OCRDMA_MAX_SGID)
-		return -EINVAL;
-
-	ret = ib_get_cached_gid(ibdev, port, index, sgid, NULL);
-	if (ret == -EAGAIN) {
-		memcpy(sgid, &zgid, sizeof(*sgid));
-		return 0;
-	}
-
-	return ret;
-}
-
 int ocrdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr,
 			struct ib_udata *uhw)
 {

drivers/infiniband/hw/ocrdma/ocrdma_verbs.h

@@ -61,8 +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);
-int ocrdma_query_gid(struct ib_device *, u8 port,
-		     int index, union ib_gid *gid);
 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);
 

drivers/infiniband/hw/qedr/main.c

@@ -162,7 +162,6 @@ static int qedr_iw_register_device(struct qedr_dev *dev)
 static void qedr_roce_register_device(struct qedr_dev *dev)
 {
 	dev->ibdev.node_type = RDMA_NODE_IB_CA;
-	dev->ibdev.query_gid = qedr_query_gid;
 
 	dev->ibdev.get_port_immutable = qedr_roce_port_immutable;
 }

drivers/infiniband/hw/qedr/verbs.c

@@ -84,27 +84,6 @@ int qedr_iw_query_gid(struct ib_device *ibdev, u8 port,
 	return 0;
 }
 
-int qedr_query_gid(struct ib_device *ibdev, u8 port, int index,
-		   union ib_gid *sgid)
-{
-	struct qedr_dev *dev = get_qedr_dev(ibdev);
-	int rc = 0;
-
-	if (!rdma_cap_roce_gid_table(ibdev, port))
-		return -ENODEV;
-
-	rc = ib_get_cached_gid(ibdev, port, index, sgid, NULL);
-	if (rc == -EAGAIN) {
-		memcpy(sgid, &zgid, sizeof(*sgid));
-		return 0;
-	}
-
-	DP_DEBUG(dev, QEDR_MSG_INIT, "query gid: index=%d %llx:%llx\n", index,
-		 sgid->global.interface_id, sgid->global.subnet_prefix);
-
-	return rc;
-}
-
 int qedr_query_device(struct ib_device *ibdev,
 		      struct ib_device_attr *attr, struct ib_udata *udata)
 {

drivers/infiniband/hw/qedr/verbs.h

@@ -38,7 +38,6 @@ int qedr_query_port(struct ib_device *, u8 port, struct ib_port_attr *props);
 int qedr_modify_port(struct ib_device *, u8 port, int mask,
 		     struct ib_port_modify *props);
 
-int qedr_query_gid(struct ib_device *, u8 port, int index, union ib_gid *gid);
 int qedr_iw_query_gid(struct ib_device *ibdev, u8 port,
 		      int index, union ib_gid *gid);
 

drivers/infiniband/sw/rxe/rxe_verbs.c

@@ -77,23 +77,6 @@ static int rxe_query_port(struct ib_device *dev,
 	return rc;
 }
 
-static int rxe_query_gid(struct ib_device *device,
-			 u8 port_num, int index, union ib_gid *gid)
-{
-	int ret;
-
-	if (index > RXE_PORT_GID_TBL_LEN)
-		return -EINVAL;
-
-	ret = ib_get_cached_gid(device, port_num, index, gid, NULL);
-	if (ret == -EAGAIN) {
-		memcpy(gid, &zgid, sizeof(*gid));
-		return 0;
-	}
-
-	return ret;
-}
-
 static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int
 		       index, const union ib_gid *gid,
 		       const struct ib_gid_attr *attr, void **context)
@@ -1285,7 +1268,6 @@ int rxe_register_device(struct rxe_dev *rxe)
 	dev->query_port = rxe_query_port;
 	dev->modify_port = rxe_modify_port;
 	dev->get_link_layer = rxe_get_link_layer;
-	dev->query_gid = rxe_query_gid;
 	dev->get_netdev = rxe_get_netdev;
 	dev->add_gid = rxe_add_gid;
 	dev->del_gid = rxe_del_gid;