cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mpfs.h (3562B)

      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