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 | #else /* #ifndef CONFIG_MLX5_MPFS */ |
88 | static inline int mlx5_mpfs_init(struct mlx5_core_dev *dev) { return 0; } |
89 | static inline void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev) {} |
90 | #endif |
91 | |
92 | #endif |
93 | |