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 SCHED_FW_OP_DEL,
56 };
57
58 enum sched_bind_type {
59 SCHED_QUEUE,
60 SCHED_FLOWC,
61 };
62
63 struct sched_queue_entry {
64 struct list_head list;
65 unsigned int cntxt_id;
66 struct ch_sched_queue param;
67 };
68
69 struct sched_flowc_entry {
70 struct list_head list;
71 struct ch_sched_flowc param;
72 };
73
74 struct 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
83 struct sched_table { /* per port scheduling table */
84 u8 sched_size;
85 struct sched_class tab[];
86 };
87
can_sched(struct net_device * dev)88 static 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
valid_class_id(struct net_device * dev,u8 class_id)95 static 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
106 struct sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
107 struct ch_sched_queue *p);
108 int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
109 enum sched_bind_type type);
110 int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
111 enum sched_bind_type type);
112
113 struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
114 struct ch_sched_params *p);
115 void cxgb4_sched_class_free(struct net_device *dev, u8 classid);
116
117 struct sched_table *t4_init_sched(unsigned int size);
118 void t4_cleanup_sched(struct adapter *adap);
119 #endif /* __CXGB4_SCHED_H */
120