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 96