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[] __counted_by(sched_size); |
86 | }; |
87 | |
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 | |
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 | |