1 // SPDX-License-Identifier: GPL-2.0+
2 /* Microchip Sparx5 Switch driver
3  *
4  * Copyright (c) 2022 Microchip Technology Inc. and its subsidiaries.
5  */
6 
7 #include <net/pkt_cls.h>
8 
9 #include "sparx5_tc.h"
10 #include "sparx5_main.h"
11 #include "sparx5_qos.h"
12 
13 static void sparx5_tc_get_layer_and_idx(u32 parent, u32 portno, u32 *layer,
14 					u32 *idx)
15 {
16 	if (parent == TC_H_ROOT) {
17 		*layer = 2;
18 		*idx = portno;
19 	} else {
20 		u32 queue = TC_H_MIN(parent) - 1;
21 		*layer = 0;
22 		*idx = SPX5_HSCH_L0_GET_IDX(portno, queue);
23 	}
24 }
25 
26 static int sparx5_tc_setup_qdisc_mqprio(struct net_device *ndev,
27 					struct tc_mqprio_qopt_offload *m)
28 {
29 	m->qopt.hw = TC_MQPRIO_HW_OFFLOAD_TCS;
30 
31 	if (m->qopt.num_tc == 0)
32 		return sparx5_tc_mqprio_del(ndev);
33 	else
34 		return sparx5_tc_mqprio_add(ndev, m->qopt.num_tc);
35 }
36 
37 static int sparx5_tc_setup_qdisc_tbf(struct net_device *ndev,
38 				     struct tc_tbf_qopt_offload *qopt)
39 {
40 	struct sparx5_port *port = netdev_priv(ndev);
41 	u32 layer, se_idx;
42 
43 	sparx5_tc_get_layer_and_idx(qopt->parent, port->portno, &layer,
44 				    &se_idx);
45 
46 	switch (qopt->command) {
47 	case TC_TBF_REPLACE:
48 		return sparx5_tc_tbf_add(port, &qopt->replace_params, layer,
49 					 se_idx);
50 	case TC_TBF_DESTROY:
51 		return sparx5_tc_tbf_del(port, layer, se_idx);
52 	case TC_TBF_STATS:
53 		return -EOPNOTSUPP;
54 	default:
55 		return -EOPNOTSUPP;
56 	}
57 
58 	return -EOPNOTSUPP;
59 }
60 
61 int sparx5_port_setup_tc(struct net_device *ndev, enum tc_setup_type type,
62 			 void *type_data)
63 {
64 	switch (type) {
65 	case TC_SETUP_QDISC_MQPRIO:
66 		return sparx5_tc_setup_qdisc_mqprio(ndev, type_data);
67 	case TC_SETUP_QDISC_TBF:
68 		return sparx5_tc_setup_qdisc_tbf(ndev, type_data);
69 	default:
70 		return -EOPNOTSUPP;
71 	}
72 
73 	return 0;
74 }
75