1b72a32daSRahul Lakkireddy /*
2b72a32daSRahul Lakkireddy * This file is part of the Chelsio T4 Ethernet driver for Linux.
3b72a32daSRahul Lakkireddy *
4b72a32daSRahul Lakkireddy * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
5b72a32daSRahul Lakkireddy *
6b72a32daSRahul Lakkireddy * This software is available to you under a choice of one of two
7b72a32daSRahul Lakkireddy * licenses. You may choose to be licensed under the terms of the GNU
8b72a32daSRahul Lakkireddy * General Public License (GPL) Version 2, available from the file
9b72a32daSRahul Lakkireddy * COPYING in the main directory of this source tree, or the
10b72a32daSRahul Lakkireddy * OpenIB.org BSD license below:
11b72a32daSRahul Lakkireddy *
12b72a32daSRahul Lakkireddy * Redistribution and use in source and binary forms, with or
13b72a32daSRahul Lakkireddy * without modification, are permitted provided that the following
14b72a32daSRahul Lakkireddy * conditions are met:
15b72a32daSRahul Lakkireddy *
16b72a32daSRahul Lakkireddy * - Redistributions of source code must retain the above
17b72a32daSRahul Lakkireddy * copyright notice, this list of conditions and the following
18b72a32daSRahul Lakkireddy * disclaimer.
19b72a32daSRahul Lakkireddy *
20b72a32daSRahul Lakkireddy * - Redistributions in binary form must reproduce the above
21b72a32daSRahul Lakkireddy * copyright notice, this list of conditions and the following
22b72a32daSRahul Lakkireddy * disclaimer in the documentation and/or other materials
23b72a32daSRahul Lakkireddy * provided with the distribution.
24b72a32daSRahul Lakkireddy *
25b72a32daSRahul Lakkireddy * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26b72a32daSRahul Lakkireddy * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27b72a32daSRahul Lakkireddy * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28b72a32daSRahul Lakkireddy * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29b72a32daSRahul Lakkireddy * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30b72a32daSRahul Lakkireddy * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31b72a32daSRahul Lakkireddy * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32b72a32daSRahul Lakkireddy * SOFTWARE.
33b72a32daSRahul Lakkireddy */
34b72a32daSRahul Lakkireddy
35b72a32daSRahul Lakkireddy #ifndef __CXGB4_SCHED_H
36b72a32daSRahul Lakkireddy #define __CXGB4_SCHED_H
37b72a32daSRahul Lakkireddy
38b72a32daSRahul Lakkireddy #include <linux/spinlock.h>
39b72a32daSRahul Lakkireddy #include <linux/atomic.h>
40b72a32daSRahul Lakkireddy
41b72a32daSRahul Lakkireddy #define SCHED_CLS_NONE 0xff
42b72a32daSRahul Lakkireddy
436cede1f1SRahul Lakkireddy #define FW_SCHED_CLS_NONE 0xffffffff
446cede1f1SRahul Lakkireddy
45d185efc1SGanesh Goudar /* Max rate that can be set to a scheduling class is 100 Gbps */
46d185efc1SGanesh Goudar #define SCHED_MAX_RATE_KBPS 100000000U
4710a2604eSRahul Lakkireddy
48b72a32daSRahul Lakkireddy enum {
49b72a32daSRahul Lakkireddy SCHED_STATE_ACTIVE,
50b72a32daSRahul Lakkireddy SCHED_STATE_UNUSED,
51b72a32daSRahul Lakkireddy };
52b72a32daSRahul Lakkireddy
53b72a32daSRahul Lakkireddy enum sched_fw_ops {
54b72a32daSRahul Lakkireddy SCHED_FW_OP_ADD,
554ec4762dSRahul Lakkireddy SCHED_FW_OP_DEL,
56b72a32daSRahul Lakkireddy };
57b72a32daSRahul Lakkireddy
586cede1f1SRahul Lakkireddy enum sched_bind_type {
596cede1f1SRahul Lakkireddy SCHED_QUEUE,
600e395b3cSRahul Lakkireddy SCHED_FLOWC,
616cede1f1SRahul Lakkireddy };
626cede1f1SRahul Lakkireddy
636cede1f1SRahul Lakkireddy struct sched_queue_entry {
646cede1f1SRahul Lakkireddy struct list_head list;
656cede1f1SRahul Lakkireddy unsigned int cntxt_id;
666cede1f1SRahul Lakkireddy struct ch_sched_queue param;
676cede1f1SRahul Lakkireddy };
686cede1f1SRahul Lakkireddy
690e395b3cSRahul Lakkireddy struct sched_flowc_entry {
700e395b3cSRahul Lakkireddy struct list_head list;
710e395b3cSRahul Lakkireddy struct ch_sched_flowc param;
720e395b3cSRahul Lakkireddy };
730e395b3cSRahul Lakkireddy
74b72a32daSRahul Lakkireddy struct sched_class {
75b72a32daSRahul Lakkireddy u8 state;
76b72a32daSRahul Lakkireddy u8 idx;
77b72a32daSRahul Lakkireddy struct ch_sched_params info;
780e395b3cSRahul Lakkireddy enum sched_bind_type bind_type;
790e395b3cSRahul Lakkireddy struct list_head entry_list;
80b72a32daSRahul Lakkireddy atomic_t refcnt;
81b72a32daSRahul Lakkireddy };
82b72a32daSRahul Lakkireddy
83b72a32daSRahul Lakkireddy struct sched_table { /* per port scheduling table */
84b72a32daSRahul Lakkireddy u8 sched_size;
8565dc2f1aSGustavo A. R. Silva struct sched_class tab[];
86b72a32daSRahul Lakkireddy };
87b72a32daSRahul Lakkireddy
can_sched(struct net_device * dev)88b72a32daSRahul Lakkireddy static inline bool can_sched(struct net_device *dev)
89b72a32daSRahul Lakkireddy {
90b72a32daSRahul Lakkireddy struct port_info *pi = netdev2pinfo(dev);
91b72a32daSRahul Lakkireddy
92b72a32daSRahul Lakkireddy return !pi->sched_tbl ? false : true;
93b72a32daSRahul Lakkireddy }
94b72a32daSRahul Lakkireddy
valid_class_id(struct net_device * dev,u8 class_id)95b72a32daSRahul Lakkireddy static inline bool valid_class_id(struct net_device *dev, u8 class_id)
96b72a32daSRahul Lakkireddy {
97b72a32daSRahul Lakkireddy struct port_info *pi = netdev2pinfo(dev);
98b72a32daSRahul Lakkireddy
99b72a32daSRahul Lakkireddy if ((class_id > pi->sched_tbl->sched_size - 1) &&
100b72a32daSRahul Lakkireddy (class_id != SCHED_CLS_NONE))
101b72a32daSRahul Lakkireddy return false;
102b72a32daSRahul Lakkireddy
103b72a32daSRahul Lakkireddy return true;
104b72a32daSRahul Lakkireddy }
105b72a32daSRahul Lakkireddy
106c856e2b6SRahul Lakkireddy struct sched_class *cxgb4_sched_queue_lookup(struct net_device *dev,
107c856e2b6SRahul Lakkireddy struct ch_sched_queue *p);
1086cede1f1SRahul Lakkireddy int cxgb4_sched_class_bind(struct net_device *dev, void *arg,
1096cede1f1SRahul Lakkireddy enum sched_bind_type type);
1106cede1f1SRahul Lakkireddy int cxgb4_sched_class_unbind(struct net_device *dev, void *arg,
1116cede1f1SRahul Lakkireddy enum sched_bind_type type);
1126cede1f1SRahul Lakkireddy
113b72a32daSRahul Lakkireddy struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev,
114b72a32daSRahul Lakkireddy struct ch_sched_params *p);
1150e395b3cSRahul Lakkireddy void cxgb4_sched_class_free(struct net_device *dev, u8 classid);
116b72a32daSRahul Lakkireddy
117b72a32daSRahul Lakkireddy struct sched_table *t4_init_sched(unsigned int size);
118b72a32daSRahul Lakkireddy void t4_cleanup_sched(struct adapter *adap);
119b72a32daSRahul Lakkireddy #endif /* __CXGB4_SCHED_H */
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