mpfs.h

  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 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(sizeof(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
 89struct mlx5_core_dev;
 90int  mlx5_mpfs_init(struct mlx5_core_dev *dev);
 91void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev);
 92int mlx5_mpfs_enable(struct mlx5_core_dev *dev);
 93void mlx5_mpfs_disable(struct mlx5_core_dev *dev);
 94#else /* #ifndef CONFIG_MLX5_MPFS */
 95static inline int  mlx5_mpfs_init(struct mlx5_core_dev *dev) { return 0; }
 96static inline void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev) {}
 97static inline int mlx5_mpfs_enable(struct mlx5_core_dev *dev) { return 0; }
 98static inline void mlx5_mpfs_disable(struct mlx5_core_dev *dev) {}
 99#endif
100
101#endif