1 /*
2 * This file is part of the Chelsio T4 Ethernet driver for Linux.
3 *
4 * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #ifndef __CXGB4_SCHED_H
36 #define __CXGB4_SCHED_H
37
38 #include <linux/spinlock.h>
39 #include <linux/atomic.h>
40
41 #define SCHED_CLS_NONE 0xff
42
43 #define FW_SCHED_CLS_NONE 0xffffffff
44
45 /* Max rate that can be set to a scheduling class is 100 Gbps */
46 #define SCHED_MAX_RATE_KBPS 100000000U
47
48 enum {
49 SCHED_STATE_ACTIVE,
50 SCHED_STATE_UNUSED,
51 };
52
53 enum sched_fw_ops {
54 SCHED_FW_OP_ADD,
55 };
56
57 enum sched_bind_type {
58 SCHED_QUEUE,
59 };
60
61 struct sched_queue_entry {
62 struct list_head list;
63 unsigned int cntxt_id;
64 struct ch_sched_queue param;
65 };
66
67 struct sched_class {
68 u8 state;
69 u8 idx;
70 struct ch_sched_params info;
71 struct list_head queue_list;
72 atomic_t refcnt;
73 };
74
75 struct sched_table { /* per port scheduling table */
76 u8 sched_size;
77 struct sched_class tab[0];
78 };
79
80 static inline bool can_sched(struct net_device *dev)
81 {
82 struct port_info *pi = netdev2pinfo(dev);
83
84 return !pi->sched_tbl ? false : true;
85 }
86
87 static inline bool valid_class_id(struct net_device *dev, u8 class_id)
88 {
89 struct port_info *pi = netdev2pinfo(dev);
90
91 if ((class_id > pi->sched_tbl->sched_size - 1) &&
92 (class_id != SCHED_CLS_NONE))
93 return false;
94
95 return true;
96 }
97
98 int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
99 enum sched_bind_type type);
100 int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
101 enum sched_bind_type type);
102
103 struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
104 struct ch_sched_params *p);
105
106 struct sched_table *t4_init_sched(unsigned int size);
107 void t4_cleanup_sched(struct adapter *adap);
108 #endif /* __CXGB4_SCHED_H */