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
43struct 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
85int  mlx5_mpfs_init(struct mlx5_core_dev *dev);
86void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev);
87#else /* #ifndef CONFIG_MLX5_MPFS */
88static inline int  mlx5_mpfs_init(struct mlx5_core_dev *dev) { return 0; }
89static inline void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev) {}
90#endif
91
92#endif
93