1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * This file is part of the Chelsio T4 Ethernet driver for Linux.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * This software is available to you under a choice of one of two
7*4882a593Smuzhiyun * licenses. You may choose to be licensed under the terms of the GNU
8*4882a593Smuzhiyun * General Public License (GPL) Version 2, available from the file
9*4882a593Smuzhiyun * COPYING in the main directory of this source tree, or the
10*4882a593Smuzhiyun * OpenIB.org BSD license below:
11*4882a593Smuzhiyun *
12*4882a593Smuzhiyun * Redistribution and use in source and binary forms, with or
13*4882a593Smuzhiyun * without modification, are permitted provided that the following
14*4882a593Smuzhiyun * conditions are met:
15*4882a593Smuzhiyun *
16*4882a593Smuzhiyun * - Redistributions of source code must retain the above
17*4882a593Smuzhiyun * copyright notice, this list of conditions and the following
18*4882a593Smuzhiyun * disclaimer.
19*4882a593Smuzhiyun *
20*4882a593Smuzhiyun * - Redistributions in binary form must reproduce the above
21*4882a593Smuzhiyun * copyright notice, this list of conditions and the following
22*4882a593Smuzhiyun * disclaimer in the documentation and/or other materials
23*4882a593Smuzhiyun * provided with the distribution.
24*4882a593Smuzhiyun *
25*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26*4882a593Smuzhiyun * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27*4882a593Smuzhiyun * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28*4882a593Smuzhiyun * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29*4882a593Smuzhiyun * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30*4882a593Smuzhiyun * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32*4882a593Smuzhiyun * SOFTWARE.
33*4882a593Smuzhiyun */
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #ifndef __CXGB4_SCHED_H
36*4882a593Smuzhiyun #define __CXGB4_SCHED_H
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun #include <linux/spinlock.h>
39*4882a593Smuzhiyun #include <linux/atomic.h>
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun #define SCHED_CLS_NONE 0xff
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun #define FW_SCHED_CLS_NONE 0xffffffff
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun /* Max rate that can be set to a scheduling class is 100 Gbps */
46*4882a593Smuzhiyun #define SCHED_MAX_RATE_KBPS 100000000U
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun enum {
49*4882a593Smuzhiyun SCHED_STATE_ACTIVE,
50*4882a593Smuzhiyun SCHED_STATE_UNUSED,
51*4882a593Smuzhiyun };
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun enum sched_fw_ops {
54*4882a593Smuzhiyun SCHED_FW_OP_ADD,
55*4882a593Smuzhiyun SCHED_FW_OP_DEL,
56*4882a593Smuzhiyun };
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun enum sched_bind_type {
59*4882a593Smuzhiyun SCHED_QUEUE,
60*4882a593Smuzhiyun SCHED_FLOWC,
61*4882a593Smuzhiyun };
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun struct sched_queue_entry {
64*4882a593Smuzhiyun struct list_head list;
65*4882a593Smuzhiyun unsigned int cntxt_id;
66*4882a593Smuzhiyun struct ch_sched_queue param;
67*4882a593Smuzhiyun };
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun struct sched_flowc_entry {
70*4882a593Smuzhiyun struct list_head list;
71*4882a593Smuzhiyun struct ch_sched_flowc param;
72*4882a593Smuzhiyun };
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun struct sched_class {
75*4882a593Smuzhiyun u8 state;
76*4882a593Smuzhiyun u8 idx;
77*4882a593Smuzhiyun struct ch_sched_params info;
78*4882a593Smuzhiyun enum sched_bind_type bind_type;
79*4882a593Smuzhiyun struct list_head entry_list;
80*4882a593Smuzhiyun atomic_t refcnt;
81*4882a593Smuzhiyun };
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun struct sched_table { /* per port scheduling table */
84*4882a593Smuzhiyun u8 sched_size;
85*4882a593Smuzhiyun struct sched_class tab[];
86*4882a593Smuzhiyun };
87*4882a593Smuzhiyun
can_sched(struct net_device * dev)88*4882a593Smuzhiyun static inline bool can_sched(struct net_device *dev)
89*4882a593Smuzhiyun {
90*4882a593Smuzhiyun struct port_info *pi = netdev2pinfo(dev);
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun return !pi->sched_tbl ? false : true;
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun
valid_class_id(struct net_device * dev,u8 class_id)95*4882a593Smuzhiyun static inline bool valid_class_id(struct net_device *dev, u8 class_id)
96*4882a593Smuzhiyun {
97*4882a593Smuzhiyun struct port_info *pi = netdev2pinfo(dev);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun if ((class_id > pi->sched_tbl->sched_size - 1) &&
100*4882a593Smuzhiyun (class_id != SCHED_CLS_NONE))
101*4882a593Smuzhiyun return false;
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun return true;
104*4882a593Smuzhiyun }
105*4882a593Smuzhiyun
106*4882a593Smuzhiyun struct sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
107*4882a593Smuzhiyun struct ch_sched_queue *p);
108*4882a593Smuzhiyun int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
109*4882a593Smuzhiyun enum sched_bind_type type);
110*4882a593Smuzhiyun int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
111*4882a593Smuzhiyun enum sched_bind_type type);
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
114*4882a593Smuzhiyun struct ch_sched_params *p);
115*4882a593Smuzhiyun void cxgb4_sched_class_free(struct net_device *dev, u8 classid);
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun struct sched_table *t4_init_sched(unsigned int size);
118*4882a593Smuzhiyun void t4_cleanup_sched(struct adapter *adap);
119*4882a593Smuzhiyun #endif /* __CXGB4_SCHED_H */
120