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
48enum {
49 SCHED_STATE_ACTIVE,
50 SCHED_STATE_UNUSED,
51};
52
53enum sched_fw_ops {
54 SCHED_FW_OP_ADD,
55 SCHED_FW_OP_DEL,
56};
57
58enum sched_bind_type {
59 SCHED_QUEUE,
60 SCHED_FLOWC,
61};
62
63struct sched_queue_entry {
64 struct list_head list;
65 unsigned int cntxt_id;
66 struct ch_sched_queue param;
67};
68
69struct sched_flowc_entry {
70 struct list_head list;
71 struct ch_sched_flowc param;
72};
73
74struct sched_class {
75 u8 state;
76 u8 idx;
77 struct ch_sched_params info;
78 enum sched_bind_type bind_type;
79 struct list_head entry_list;
80 atomic_t refcnt;
81};
82
83struct sched_table { /* per port scheduling table */
84 u8 sched_size;
85 struct sched_class tab[] __counted_by(sched_size);
86};
87
88static inline bool can_sched(struct net_device *dev)
89{
90 struct port_info *pi = netdev2pinfo(dev);
91
92 return !pi->sched_tbl ? false : true;
93}
94
95static inline bool valid_class_id(struct net_device *dev, u8 class_id)
96{
97 struct port_info *pi = netdev2pinfo(dev);
98
99 if ((class_id > pi->sched_tbl->sched_size - 1) &&
100 (class_id != SCHED_CLS_NONE))
101 return false;
102
103 return true;
104}
105
106struct sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
107 struct ch_sched_queue *p);
108int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
109 enum sched_bind_type type);
110int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
111 enum sched_bind_type type);
112
113struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
114 struct ch_sched_params *p);
115void cxgb4_sched_class_free(struct net_device *dev, u8 classid);
116
117struct sched_table *t4_init_sched(unsigned int size);
118void t4_cleanup_sched(struct adapter *adap);
119#endif /* __CXGB4_SCHED_H */
120

source code of linux/drivers/net/ethernet/chelsio/cxgb4/sched.h