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[0];
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 */