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
26 #include "opt_rss.h"
27 #include "opt_ratelimit.h"
28
29 #include <linux/types.h>
30 #include <linux/etherdevice.h>
31
32 #include <dev/mlx5/mlx5_ifc.h>
33 #include <dev/mlx5/device.h>
34 #include <dev/mlx5/mpfs.h>
35 #include <dev/mlx5/driver.h>
36
37 #include <dev/mlx5/mlx5_core/mlx5_core.h>
38
39 #define MPFS_LOCK(dev) spin_lock(&(dev)->mpfs.spinlock)
40 #define MPFS_UNLOCK(dev) spin_unlock(&(dev)->mpfs.spinlock)
41
42 int
mlx5_mpfs_add_mac(struct mlx5_core_dev * dev,u32 * p_index,const u8 * mac,u8 vlan_valid,u16 vlan)43 mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u32 *p_index, const u8 *mac,
44 u8 vlan_valid, u16 vlan)
45 {
46 const u32 l2table_size = MIN(1U << MLX5_CAP_GEN(dev, log_max_l2_table),
47 MLX5_MPFS_TABLE_MAX);
48 u32 in[MLX5_ST_SZ_DW(set_l2_table_entry_in)] = {};
49 u32 out[MLX5_ST_SZ_DW(set_l2_table_entry_out)] = {};
50 u8 *in_mac_addr;
51 u32 index;
52 int err;
53
54 if (!MLX5_CAP_GEN(dev, eswitch_flow_table)) {
55 *p_index = 0;
56 return (0);
57 }
58
59 MPFS_LOCK(dev);
60 index = find_first_zero_bit(dev->mpfs.bitmap, l2table_size);
61 if (index < l2table_size)
62 set_bit(index, dev->mpfs.bitmap);
63 MPFS_UNLOCK(dev);
64
65 if (index >= l2table_size)
66 return (-ENOMEM);
67
68 MLX5_SET(set_l2_table_entry_in, in, opcode, MLX5_CMD_OP_SET_L2_TABLE_ENTRY);
69 MLX5_SET(set_l2_table_entry_in, in, table_index, index);
70 MLX5_SET(set_l2_table_entry_in, in, vlan_valid, vlan_valid);
71 MLX5_SET(set_l2_table_entry_in, in, vlan, vlan);
72
73 in_mac_addr = MLX5_ADDR_OF(set_l2_table_entry_in, in, mac_address);
74 ether_addr_copy(&in_mac_addr[2], mac);
75
76 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
77 if (err != 0) {
78 MPFS_LOCK(dev);
79 clear_bit(index, dev->mpfs.bitmap);
80 MPFS_UNLOCK(dev);
81 } else {
82 *p_index = index;
83 }
84 return (err);
85 }
86
87 int
mlx5_mpfs_del_mac(struct mlx5_core_dev * dev,u32 index)88 mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u32 index)
89 {
90 u32 in[MLX5_ST_SZ_DW(delete_l2_table_entry_in)] = {};
91 u32 out[MLX5_ST_SZ_DW(delete_l2_table_entry_out)] = {};
92 int err;
93
94 if (!MLX5_CAP_GEN(dev, eswitch_flow_table)) {
95 if (index != 0)
96 return (-EINVAL);
97 return (0);
98 }
99
100 MLX5_SET(delete_l2_table_entry_in, in, opcode, MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
101 MLX5_SET(delete_l2_table_entry_in, in, table_index, index);
102
103 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
104 if (err == 0) {
105 MPFS_LOCK(dev);
106 clear_bit(index, dev->mpfs.bitmap);
107 MPFS_UNLOCK(dev);
108 }
109 return (err);
110 }
111
112 int
mlx5_mpfs_init(struct mlx5_core_dev * dev)113 mlx5_mpfs_init(struct mlx5_core_dev *dev)
114 {
115
116 spin_lock_init(&dev->mpfs.spinlock);
117 bitmap_zero(dev->mpfs.bitmap, MLX5_MPFS_TABLE_MAX);
118 return (0);
119 }
120
121 void
mlx5_mpfs_destroy(struct mlx5_core_dev * dev)122 mlx5_mpfs_destroy(struct mlx5_core_dev *dev)
123 {
124 u32 num;
125
126 num = bitmap_weight(dev->mpfs.bitmap, MLX5_MPFS_TABLE_MAX);
127 if (num != 0)
128 mlx5_core_err(dev, "Leaking %u MPFS MAC table entries\n", num);
129
130 spin_lock_destroy(&dev->mpfs.spinlock);
131 }
132