1 /*-
2 * Copyright (c) 2019, Mellanox Technologies, Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28 #include <linux/types.h>
29 #include <linux/etherdevice.h>
30
31 #include <dev/mlx5/mlx5_ifc.h>
32 #include <dev/mlx5/device.h>
33 #include <dev/mlx5/mpfs.h>
34 #include <dev/mlx5/driver.h>
35
36 #include "mlx5_core.h"
37
38 #define MPFS_LOCK(dev) spin_lock(&(dev)->mpfs.spinlock)
39 #define MPFS_UNLOCK(dev) spin_unlock(&(dev)->mpfs.spinlock)
40
41 int
mlx5_mpfs_add_mac(struct mlx5_core_dev * dev,u32 * p_index,const u8 * mac,u8 vlan_valid,u16 vlan)42 mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u32 *p_index, const u8 *mac,
43 u8 vlan_valid, u16 vlan)
44 {
45 const u32 l2table_size = MIN(1U << MLX5_CAP_GEN(dev, log_max_l2_table),
46 MLX5_MPFS_TABLE_MAX);
47 u32 in[MLX5_ST_SZ_DW(set_l2_table_entry_in)] = {};
48 u32 out[MLX5_ST_SZ_DW(set_l2_table_entry_out)] = {};
49 u8 *in_mac_addr;
50 u32 index;
51 int err;
52
53 if (!MLX5_CAP_GEN(dev, eswitch_flow_table)) {
54 *p_index = 0;
55 return (0);
56 }
57
58 MPFS_LOCK(dev);
59 index = find_first_zero_bit(dev->mpfs.bitmap, l2table_size);
60 if (index < l2table_size)
61 set_bit(index, dev->mpfs.bitmap);
62 MPFS_UNLOCK(dev);
63
64 if (index >= l2table_size)
65 return (-ENOMEM);
66
67 MLX5_SET(set_l2_table_entry_in, in, opcode, MLX5_CMD_OP_SET_L2_TABLE_ENTRY);
68 MLX5_SET(set_l2_table_entry_in, in, table_index, index);
69 MLX5_SET(set_l2_table_entry_in, in, vlan_valid, vlan_valid);
70 MLX5_SET(set_l2_table_entry_in, in, vlan, vlan);
71
72 in_mac_addr = MLX5_ADDR_OF(set_l2_table_entry_in, in, mac_address);
73 ether_addr_copy(&in_mac_addr[2], mac);
74
75 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
76 if (err != 0) {
77 MPFS_LOCK(dev);
78 clear_bit(index, dev->mpfs.bitmap);
79 MPFS_UNLOCK(dev);
80 } else {
81 *p_index = index;
82 }
83 return (err);
84 }
85
86 int
mlx5_mpfs_del_mac(struct mlx5_core_dev * dev,u32 index)87 mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u32 index)
88 {
89 u32 in[MLX5_ST_SZ_DW(delete_l2_table_entry_in)] = {};
90 u32 out[MLX5_ST_SZ_DW(delete_l2_table_entry_out)] = {};
91 int err;
92
93 if (!MLX5_CAP_GEN(dev, eswitch_flow_table)) {
94 if (index != 0)
95 return (-EINVAL);
96 return (0);
97 }
98
99 MLX5_SET(delete_l2_table_entry_in, in, opcode, MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
100 MLX5_SET(delete_l2_table_entry_in, in, table_index, index);
101
102 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
103 if (err == 0) {
104 MPFS_LOCK(dev);
105 clear_bit(index, dev->mpfs.bitmap);
106 MPFS_UNLOCK(dev);
107 }
108 return (err);
109 }
110
111 int
mlx5_mpfs_init(struct mlx5_core_dev * dev)112 mlx5_mpfs_init(struct mlx5_core_dev *dev)
113 {
114
115 spin_lock_init(&dev->mpfs.spinlock);
116 bitmap_zero(dev->mpfs.bitmap, MLX5_MPFS_TABLE_MAX);
117 return (0);
118 }
119
120 void
mlx5_mpfs_destroy(struct mlx5_core_dev * dev)121 mlx5_mpfs_destroy(struct mlx5_core_dev *dev)
122 {
123 u32 num;
124
125 num = bitmap_weight(dev->mpfs.bitmap, MLX5_MPFS_TABLE_MAX);
126 if (num != 0)
127 mlx5_core_err(dev, "Leaking %u MPFS MAC table entries\n", num);
128
129 spin_lock_destroy(&dev->mpfs.spinlock);
130 }
131