RDMA: Remove constant domain argument from flow creation call

The "domain" argument is constant and modern device (mlx5) doesn't support
anything except IB_FLOW_DOMAIN_USER, so delete this extra parameter and
simplify code.

Link: https://lore.kernel.org/r/20200730081235.1581127-4-leon@kernel.orgSigned-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/core/uverbs_cmd.c

@@ -3232,8 +3232,8 @@ static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
 		goto err_free;
 	}
 
-	flow_id = qp->device->ops.create_flow(
-		qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata);
+	flow_id = qp->device->ops.create_flow(qp, flow_attr,
+					      &attrs->driver_udata);
 
 	if (IS_ERR(flow_id)) {
 		err = PTR_ERR(flow_id);

drivers/infiniband/hw/mlx4/main.c

@@ -1532,23 +1532,11 @@ static int __mlx4_ib_create_flow(struct ib_qp *qp, struct ib_flow_attr *flow_att
 	struct mlx4_net_trans_rule_hw_ctrl *ctrl;
 	int default_flow;
 
-	static const u16 __mlx4_domain[] = {
-		[IB_FLOW_DOMAIN_USER] = MLX4_DOMAIN_UVERBS,
-		[IB_FLOW_DOMAIN_ETHTOOL] = MLX4_DOMAIN_ETHTOOL,
-		[IB_FLOW_DOMAIN_RFS] = MLX4_DOMAIN_RFS,
-		[IB_FLOW_DOMAIN_NIC] = MLX4_DOMAIN_NIC,
-	};
-
 	if (flow_attr->priority > MLX4_IB_FLOW_MAX_PRIO) {
 		pr_err("Invalid priority value %d\n", flow_attr->priority);
 		return -EINVAL;
 	}
 
-	if (domain >= IB_FLOW_DOMAIN_NUM) {
-		pr_err("Invalid domain value %d\n", domain);
-		return -EINVAL;
-	}
-
 	if (mlx4_map_sw_to_hw_steering_mode(mdev->dev, flow_type) < 0)
 		return -EINVAL;
 
@@ -1557,8 +1545,7 @@ static int __mlx4_ib_create_flow(struct ib_qp *qp, struct ib_flow_attr *flow_att
 		return PTR_ERR(mailbox);
 	ctrl = mailbox->buf;
 
-	ctrl->prio = cpu_to_be16(__mlx4_domain[domain] |
-				 flow_attr->priority);
+	ctrl->prio = cpu_to_be16(domain | flow_attr->priority);
 	ctrl->type = mlx4_map_sw_to_hw_steering_mode(mdev->dev, flow_type);
 	ctrl->port = flow_attr->port;
 	ctrl->qpn = cpu_to_be32(qp->qp_num);
@@ -1700,8 +1687,8 @@ static int mlx4_ib_add_dont_trap_rule(struct mlx4_dev *dev,
 }
 
 static struct ib_flow *mlx4_ib_create_flow(struct ib_qp *qp,
-				    struct ib_flow_attr *flow_attr,
-				    int domain, struct ib_udata *udata)
+					   struct ib_flow_attr *flow_attr,
+					   struct ib_udata *udata)
 {
 	int err = 0, i = 0, j = 0;
 	struct mlx4_ib_flow *mflow;
@@ -1767,8 +1754,8 @@ static struct ib_flow *mlx4_ib_create_flow(struct ib_qp *qp,
 	}
 
 	while (i < ARRAY_SIZE(type) && type[i]) {
-		err = __mlx4_ib_create_flow(qp, flow_attr, domain, type[i],
-					    &mflow->reg_id[i].id);
+		err = __mlx4_ib_create_flow(qp, flow_attr, MLX4_DOMAIN_UVERBS,
+					    type[i], &mflow->reg_id[i].id);
 		if (err)
 			goto err_create_flow;
 		if (is_bonded) {
@@ -1777,7 +1764,7 @@ static struct ib_flow *mlx4_ib_create_flow(struct ib_qp *qp,
 			 */
 			flow_attr->port = 2;
 			err = __mlx4_ib_create_flow(qp, flow_attr,
-						    domain, type[j],
+						    MLX4_DOMAIN_UVERBS, type[j],
 						    &mflow->reg_id[j].mirror);
 			flow_attr->port = 1;
 			if (err)
@@ -2988,10 +2975,8 @@ int mlx4_ib_steer_qp_reg(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
 		/* Add an empty rule for IB L2 */
 		memset(&ib_spec->mask, 0, sizeof(ib_spec->mask));
 
-		err = __mlx4_ib_create_flow(&mqp->ibqp, flow,
-					    IB_FLOW_DOMAIN_NIC,
-					    MLX4_FS_REGULAR,
-					    &mqp->reg_id);
+		err = __mlx4_ib_create_flow(&mqp->ibqp, flow, MLX4_DOMAIN_NIC,
+					    MLX4_FS_REGULAR, &mqp->reg_id);
 	} else {
 		err = __mlx4_ib_destroy_flow(mdev->dev, mqp->reg_id);
 	}

drivers/infiniband/hw/mlx5/fs.c

@@ -1142,10 +1142,8 @@ static struct mlx5_ib_flow_handler *create_sniffer_rule(struct mlx5_ib_dev *dev,
 	return ERR_PTR(err);
 }
 
-
 static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
 					   struct ib_flow_attr *flow_attr,
-					   int domain,
 					   struct ib_udata *udata)
 {
 	struct mlx5_ib_dev *dev = to_mdev(qp->device);
@@ -1195,10 +1193,9 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
 		goto free_ucmd;
 	}
 
-	if (domain != IB_FLOW_DOMAIN_USER ||
-	    flow_attr->port > dev->num_ports ||
-	    (flow_attr->flags & ~(IB_FLOW_ATTR_FLAGS_DONT_TRAP |
-				  IB_FLOW_ATTR_FLAGS_EGRESS))) {
+	if (flow_attr->port > dev->num_ports ||
+	    (flow_attr->flags &
+	     ~(IB_FLOW_ATTR_FLAGS_DONT_TRAP | IB_FLOW_ATTR_FLAGS_EGRESS))) {
 		err = -EINVAL;
 		goto free_ucmd;
 	}

include/rdma/ib_verbs.h

@@ -1863,17 +1863,6 @@ enum ib_flow_spec_type {
 #define IB_FLOW_SPEC_LAYER_MASK	0xF0
 #define IB_FLOW_SPEC_SUPPORT_LAYERS 10
 
-/* Flow steering rule priority is set according to it's domain.
- * Lower domain value means higher priority.
- */
-enum ib_flow_domain {
-	IB_FLOW_DOMAIN_USER,
-	IB_FLOW_DOMAIN_ETHTOOL,
-	IB_FLOW_DOMAIN_RFS,
-	IB_FLOW_DOMAIN_NIC,
-	IB_FLOW_DOMAIN_NUM /* Must be last */
-};
-
 enum ib_flow_flags {
 	IB_FLOW_ATTR_FLAGS_DONT_TRAP = 1UL << 1, /* Continue match, no steal */
 	IB_FLOW_ATTR_FLAGS_EGRESS = 1UL << 2, /* Egress flow */
@@ -2471,7 +2460,7 @@ struct ib_device_ops {
 	void (*dealloc_xrcd)(struct ib_xrcd *xrcd, struct ib_udata *udata);
 	struct ib_flow *(*create_flow)(struct ib_qp *qp,
 				       struct ib_flow_attr *flow_attr,
-				       int domain, struct ib_udata *udata);
+				       struct ib_udata *udata);
 	int (*destroy_flow)(struct ib_flow *flow_id);
 	struct ib_flow_action *(*create_flow_action_esp)(
 		struct ib_device *device,