1 /*
2  * This file is part of the Chelsio T4/T5/T6 Ethernet driver for Linux.
3  *
4  * Copyright (c) 2017 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_SMT_H
36 #define __CXGB4_SMT_H
37 
38 #include <linux/spinlock.h>
39 #include <linux/if_ether.h>
40 #include <linux/atomic.h>
41 
42 struct adapter;
43 struct cpl_smt_write_rpl;
44 
45 /* SMT related handling. Heavily adapted based on l2t ops in l2t.h/l2t.c
46  */
47 enum {
48 	SMT_STATE_SWITCHING,
49 	SMT_STATE_UNUSED,
50 	SMT_STATE_ERROR
51 };
52 
53 enum {
54 	SMT_SIZE = 256
55 };
56 
57 struct smt_entry {
58 	u16 state;
59 	u16 idx;
60 	u16 pfvf;
61 	u8 src_mac[ETH_ALEN];
62 	int refcnt;
63 	spinlock_t lock;	/* protect smt entry add,removal */
64 };
65 
66 struct smt_data {
67 	unsigned int smt_size;
68 	rwlock_t lock;
69 	struct smt_entry smtab[] __counted_by(smt_size);
70 };
71 
72 struct smt_data *t4_init_smt(void);
73 struct smt_entry *cxgb4_smt_alloc_switching(struct net_device *dev, u8 *smac);
74 void cxgb4_smt_release(struct smt_entry *e);
75 void do_smt_write_rpl(struct adapter *p, const struct cpl_smt_write_rpl *rpl);
76 #endif /* __CXGB4_SMT_H */
77