2 * Copyright (c) 2017, Mellanox Technologies. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/etherdevice.h>
34 #include <linux/mlx5/driver.h>
35 #include <linux/mlx5/mlx5_ifc.h>
36 #include <linux/mlx5/eswitch.h>
37 #include "mlx5_core.h"
40 /* HW L2 Table (MPFS) management */
41 static int set_l2table_entry_cmd(struct mlx5_core_dev *dev, u32 index, u8 *mac)
43 u32 in[MLX5_ST_SZ_DW(set_l2_table_entry_in)] = {0};
44 u32 out[MLX5_ST_SZ_DW(set_l2_table_entry_out)] = {0};
47 MLX5_SET(set_l2_table_entry_in, in, opcode, MLX5_CMD_OP_SET_L2_TABLE_ENTRY);
48 MLX5_SET(set_l2_table_entry_in, in, table_index, index);
50 in_mac_addr = MLX5_ADDR_OF(set_l2_table_entry_in, in, mac_address);
51 ether_addr_copy(&in_mac_addr[2], mac);
53 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
56 static int del_l2table_entry_cmd(struct mlx5_core_dev *dev, u32 index)
58 u32 in[MLX5_ST_SZ_DW(delete_l2_table_entry_in)] = {0};
59 u32 out[MLX5_ST_SZ_DW(delete_l2_table_entry_out)] = {0};
61 MLX5_SET(delete_l2_table_entry_in, in, opcode, MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
62 MLX5_SET(delete_l2_table_entry_in, in, table_index, index);
63 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
66 /* UC L2 table hash node */
68 struct l2addr_node node;
69 u32 index; /* index in HW l2 table */
74 struct hlist_head hash[MLX5_L2_ADDR_HASH_SIZE];
75 struct mutex lock; /* Synchronize l2 table access */
77 unsigned long *bitmap;
80 static int alloc_l2table_index(struct mlx5_mpfs *l2table, u32 *ix)
84 *ix = find_first_zero_bit(l2table->bitmap, l2table->size);
85 if (*ix >= l2table->size)
88 __set_bit(*ix, l2table->bitmap);
93 static void free_l2table_index(struct mlx5_mpfs *l2table, u32 ix)
95 __clear_bit(ix, l2table->bitmap);
98 int mlx5_mpfs_init(struct mlx5_core_dev *dev)
100 int l2table_size = 1 << MLX5_CAP_GEN(dev, log_max_l2_table);
101 struct mlx5_mpfs *mpfs;
103 if (!MLX5_ESWITCH_MANAGER(dev))
106 mpfs = kzalloc(sizeof(*mpfs), GFP_KERNEL);
110 mutex_init(&mpfs->lock);
111 mpfs->size = l2table_size;
112 mpfs->bitmap = bitmap_zalloc(l2table_size, GFP_KERNEL);
118 dev->priv.mpfs = mpfs;
122 void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev)
124 struct mlx5_mpfs *mpfs = dev->priv.mpfs;
126 if (!MLX5_ESWITCH_MANAGER(dev))
129 WARN_ON(!hlist_empty(mpfs->hash));
130 bitmap_free(mpfs->bitmap);
134 int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac)
136 struct mlx5_mpfs *mpfs = dev->priv.mpfs;
137 struct l2table_node *l2addr;
141 if (!MLX5_ESWITCH_MANAGER(dev))
144 mutex_lock(&mpfs->lock);
146 l2addr = l2addr_hash_find(mpfs->hash, mac, struct l2table_node);
152 err = alloc_l2table_index(mpfs, &index);
156 l2addr = l2addr_hash_add(mpfs->hash, mac, struct l2table_node, GFP_KERNEL);
162 err = set_l2table_entry_cmd(dev, index, mac);
164 goto set_table_entry_err;
166 l2addr->index = index;
167 l2addr->ref_count = 1;
169 mlx5_core_dbg(dev, "MPFS mac added %pM, index (%d)\n", mac, index);
173 l2addr_hash_del(l2addr);
175 free_l2table_index(mpfs, index);
177 mutex_unlock(&mpfs->lock);
181 int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac)
183 struct mlx5_mpfs *mpfs = dev->priv.mpfs;
184 struct l2table_node *l2addr;
188 if (!MLX5_ESWITCH_MANAGER(dev))
191 mutex_lock(&mpfs->lock);
193 l2addr = l2addr_hash_find(mpfs->hash, mac, struct l2table_node);
199 if (--l2addr->ref_count > 0)
202 index = l2addr->index;
203 del_l2table_entry_cmd(dev, index);
204 l2addr_hash_del(l2addr);
205 free_l2table_index(mpfs, index);
206 mlx5_core_dbg(dev, "MPFS mac deleted %pM, index (%d)\n", mac, index);
208 mutex_unlock(&mpfs->lock);