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33#include <linux/etherdevice.h>
34#include <linux/mlx5/driver.h>
35#include <linux/mlx5/mlx5_ifc.h>
36#include "mlx5_core.h"
37#include "lib/mpfs.h"
38
39
40static int set_l2table_entry_cmd(struct mlx5_core_dev *dev, u32 index, u8 *mac)
41{
42 u32 in[MLX5_ST_SZ_DW(set_l2_table_entry_in)] = {0};
43 u32 out[MLX5_ST_SZ_DW(set_l2_table_entry_out)] = {0};
44 u8 *in_mac_addr;
45
46 MLX5_SET(set_l2_table_entry_in, in, opcode, MLX5_CMD_OP_SET_L2_TABLE_ENTRY);
47 MLX5_SET(set_l2_table_entry_in, in, table_index, index);
48
49 in_mac_addr = MLX5_ADDR_OF(set_l2_table_entry_in, in, mac_address);
50 ether_addr_copy(&in_mac_addr[2], mac);
51
52 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
53}
54
55static int del_l2table_entry_cmd(struct mlx5_core_dev *dev, u32 index)
56{
57 u32 in[MLX5_ST_SZ_DW(delete_l2_table_entry_in)] = {0};
58 u32 out[MLX5_ST_SZ_DW(delete_l2_table_entry_out)] = {0};
59
60 MLX5_SET(delete_l2_table_entry_in, in, opcode, MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY);
61 MLX5_SET(delete_l2_table_entry_in, in, table_index, index);
62 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
63}
64
65
66struct l2table_node {
67 struct l2addr_node node;
68 u32 index;
69};
70
71struct mlx5_mpfs {
72 struct hlist_head hash[MLX5_L2_ADDR_HASH_SIZE];
73 struct mutex lock;
74 u32 size;
75 unsigned long *bitmap;
76};
77
78static int alloc_l2table_index(struct mlx5_mpfs *l2table, u32 *ix)
79{
80 int err = 0;
81
82 *ix = find_first_zero_bit(l2table->bitmap, l2table->size);
83 if (*ix >= l2table->size)
84 err = -ENOSPC;
85 else
86 __set_bit(*ix, l2table->bitmap);
87
88 return err;
89}
90
91static void free_l2table_index(struct mlx5_mpfs *l2table, u32 ix)
92{
93 __clear_bit(ix, l2table->bitmap);
94}
95
96int mlx5_mpfs_init(struct mlx5_core_dev *dev)
97{
98 int l2table_size = 1 << MLX5_CAP_GEN(dev, log_max_l2_table);
99 struct mlx5_mpfs *mpfs;
100
101 if (!MLX5_VPORT_MANAGER(dev))
102 return 0;
103
104 mpfs = kzalloc(sizeof(*mpfs), GFP_KERNEL);
105 if (!mpfs)
106 return -ENOMEM;
107
108 mutex_init(&mpfs->lock);
109 mpfs->size = l2table_size;
110 mpfs->bitmap = kcalloc(BITS_TO_LONGS(l2table_size),
111 sizeof(uintptr_t), GFP_KERNEL);
112 if (!mpfs->bitmap) {
113 kfree(mpfs);
114 return -ENOMEM;
115 }
116
117 dev->priv.mpfs = mpfs;
118 return 0;
119}
120
121void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev)
122{
123 struct mlx5_mpfs *mpfs = dev->priv.mpfs;
124
125 if (!MLX5_VPORT_MANAGER(dev))
126 return;
127
128 WARN_ON(!hlist_empty(mpfs->hash));
129 kfree(mpfs->bitmap);
130 kfree(mpfs);
131}
132
133int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac)
134{
135 struct mlx5_mpfs *mpfs = dev->priv.mpfs;
136 struct l2table_node *l2addr;
137 u32 index;
138 int err;
139
140 if (!MLX5_VPORT_MANAGER(dev))
141 return 0;
142
143 mutex_lock(&mpfs->lock);
144
145 l2addr = l2addr_hash_find(mpfs->hash, mac, struct l2table_node);
146 if (l2addr) {
147 err = -EEXIST;
148 goto abort;
149 }
150
151 err = alloc_l2table_index(mpfs, &index);
152 if (err)
153 goto abort;
154
155 l2addr = l2addr_hash_add(mpfs->hash, mac, struct l2table_node, GFP_KERNEL);
156 if (!l2addr) {
157 free_l2table_index(mpfs, index);
158 err = -ENOMEM;
159 goto abort;
160 }
161
162 l2addr->index = index;
163 err = set_l2table_entry_cmd(dev, index, mac);
164 if (err) {
165 l2addr_hash_del(l2addr);
166 free_l2table_index(mpfs, index);
167 }
168
169 mlx5_core_dbg(dev, "MPFS mac added %pM, index (%d)\n", mac, index);
170abort:
171 mutex_unlock(&mpfs->lock);
172 return err;
173}
174
175int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac)
176{
177 struct mlx5_mpfs *mpfs = dev->priv.mpfs;
178 struct l2table_node *l2addr;
179 int err = 0;
180 u32 index;
181
182 if (!MLX5_VPORT_MANAGER(dev))
183 return 0;
184
185 mutex_lock(&mpfs->lock);
186
187 l2addr = l2addr_hash_find(mpfs->hash, mac, struct l2table_node);
188 if (!l2addr) {
189 err = -ENOENT;
190 goto unlock;
191 }
192
193 index = l2addr->index;
194 del_l2table_entry_cmd(dev, index);
195 l2addr_hash_del(l2addr);
196 free_l2table_index(mpfs, index);
197 mlx5_core_dbg(dev, "MPFS mac deleted %pM, index (%d)\n", mac, index);
198unlock:
199 mutex_unlock(&mpfs->lock);
200 return err;
201}
202