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
41int
42mlx5_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
86int
87mlx5_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
111int
112mlx5_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
120void
121mlx5_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