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 mlx5_mpfs_foreach(hs, tmp, mpfs, i) \
49 for (i = 0; i < MLX5_L2_ADDR_HASH_SIZE; i++) \
50 hlist_for_each_entry_safe(hs, tmp, &(mpfs)->hash[i], node.hlist)
51
52 #define for_each_l2hash_node(hn, tmp, hash, i) \
53 for (i = 0; i < MLX5_L2_ADDR_HASH_SIZE; i++) \
54 hlist_for_each_entry_safe(hn, tmp, &(hash)[i], hlist)
55
56 #define l2addr_hash_find(hash, mac, type) ({ \
57 int ix = MLX5_L2_ADDR_HASH(mac); \
58 bool found = false; \
59 type *ptr = NULL; \
60 \
61 hlist_for_each_entry(ptr, &(hash)[ix], node.hlist) \
62 if (ether_addr_equal(ptr->node.addr, mac)) {\
63 found = true; \
64 break; \
65 } \
66 if (!found) \
67 ptr = NULL; \
68 ptr; \
69 })
70
71 #define l2addr_hash_add(hash, mac, type, gfp) ({ \
72 int ix = MLX5_L2_ADDR_HASH(mac); \
73 type *ptr = NULL; \
74 \
75 ptr = kzalloc_obj(type, gfp); \
76 if (ptr) { \
77 ether_addr_copy(ptr->node.addr, mac); \
78 hlist_add_head(&ptr->node.hlist, &(hash)[ix]);\
79 } \
80 ptr; \
81 })
82
83 #define l2addr_hash_del(ptr) ({ \
84 hlist_del(&(ptr)->node.hlist); \
85 kfree(ptr); \
86 })
87
88 #ifdef CONFIG_MLX5_MPFS
89 struct mlx5_core_dev;
90 int mlx5_mpfs_init(struct mlx5_core_dev *dev);
91 void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev);
92 int mlx5_mpfs_enable(struct mlx5_core_dev *dev);
93 void mlx5_mpfs_disable(struct mlx5_core_dev *dev);
94 #else /* #ifndef CONFIG_MLX5_MPFS */
mlx5_mpfs_init(struct mlx5_core_dev * dev)95 static inline int mlx5_mpfs_init(struct mlx5_core_dev *dev) { return 0; }
mlx5_mpfs_cleanup(struct mlx5_core_dev * dev)96 static inline void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev) {}
mlx5_mpfs_enable(struct mlx5_core_dev * dev)97 static inline int mlx5_mpfs_enable(struct mlx5_core_dev *dev) { return 0; }
mlx5_mpfs_disable(struct mlx5_core_dev * dev)98 static inline void mlx5_mpfs_disable(struct mlx5_core_dev *dev) {}
99 #endif
100
101 #endif
102