1 /*
2 * Copyright (c) 2017, Mellanox Technologies, Ltd. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #ifndef __MLX5_MPFS_H__
34 #define __MLX5_MPFS_H__
35
36 #include <linux/if_ether.h>
37 #include <linux/mlx5/device.h>
38
39 /* L2 -mac address based- hash helpers */
40 #define MLX5_L2_ADDR_HASH_SIZE (BIT(BITS_PER_BYTE))
41 #define MLX5_L2_ADDR_HASH(addr) (addr[5])
42
43 struct l2addr_node {
44 struct hlist_node hlist;
45 u8 addr[ETH_ALEN];
46 };
47
48 #define for_each_l2hash_node(hn, tmp, hash, i) \
49 for (i = 0; i < MLX5_L2_ADDR_HASH_SIZE; i++) \
50 hlist_for_each_entry_safe(hn, tmp, &(hash)[i], hlist)
51
52 #define l2addr_hash_find(hash, mac, type) ({ \
53 int ix = MLX5_L2_ADDR_HASH(mac); \
54 bool found = false; \
55 type *ptr = NULL; \
56 \
57 hlist_for_each_entry(ptr, &(hash)[ix], node.hlist) \
58 if (ether_addr_equal(ptr->node.addr, mac)) {\
59 found = true; \
60 break; \
61 } \
62 if (!found) \
63 ptr = NULL; \
64 ptr; \
65 })
66
67 #define l2addr_hash_add(hash, mac, type, gfp) ({ \
68 int ix = MLX5_L2_ADDR_HASH(mac); \
69 type *ptr = NULL; \
70 \
71 ptr = kzalloc(sizeof(type), gfp); \
72 if (ptr) { \
73 ether_addr_copy(ptr->node.addr, mac); \
74 hlist_add_head(&ptr->node.hlist, &(hash)[ix]);\
75 } \
76 ptr; \
77 })
78
79 #define l2addr_hash_del(ptr) ({ \
80 hlist_del(&(ptr)->node.hlist); \
81 kfree(ptr); \
82 })
83
84 #ifdef CONFIG_MLX5_MPFS
85 int mlx5_mpfs_init(struct mlx5_core_dev *dev);
86 void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev);
87 int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac);
88 int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac);
89 #else /* #ifndef CONFIG_MLX5_MPFS */
90 static inline int mlx5_mpfs_init(struct mlx5_core_dev *dev) { return 0; }
91 static inline void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev) {}
92 static inline int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac) { return 0; }
93 static inline int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac) { return 0; }
94 #endif
95 #endif