RDMA/irdma: Add QoS definitions

Add definitions for managing the RDMA HW work scheduler (WS) tree.

A WS node is created via a control QP operation with the bandwidth
allocation, arbitration scheme, and traffic class of the QP specified.
The Qset handle returned associates the QoS parameters for the QP.
The Qset is registered with the LAN and an equivalent node is created
in the LAN packet scheduler tree.

Link: https://lore.kernel.org/r/20210602205138.889-7-shiraz.saleem@intel.comSigned-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/irdma/ws.h

+/* SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB */
+/* Copyright (c) 2015 - 2020 Intel Corporation */
+#ifndef IRDMA_WS_H
+#define IRDMA_WS_H
+
+#include "osdep.h"
+
+enum irdma_ws_node_type {
+	WS_NODE_TYPE_PARENT,
+	WS_NODE_TYPE_LEAF,
+};
+
+enum irdma_ws_match_type {
+	WS_MATCH_TYPE_VSI,
+	WS_MATCH_TYPE_TC,
+};
+
+struct irdma_ws_node {
+	struct list_head siblings;
+	struct list_head child_list_head;
+	struct irdma_ws_node *parent;
+	u64 lan_qs_handle; /* opaque handle used by LAN */
+	u32 l2_sched_node_id;
+	u16 index;
+	u16 qs_handle;
+	u16 vsi_index;
+	u8 traffic_class;
+	u8 user_pri;
+	u8 rel_bw;
+	u8 abstraction_layer; /* used for splitting a TC */
+	u8 prio_type;
+	bool type_leaf:1;
+	bool enable:1;
+};
+
+struct irdma_sc_vsi;
+enum irdma_status_code irdma_ws_add(struct irdma_sc_vsi *vsi, u8 user_pri);
+void irdma_ws_remove(struct irdma_sc_vsi *vsi, u8 user_pri);
+void irdma_ws_reset(struct irdma_sc_vsi *vsi);
+
+#endif /* IRDMA_WS_H */