1/*
2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3 *
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:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
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.
22 *
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
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34#include <linux/kernel.h>
35#include <linux/ethtool.h>
36#include <linux/netdevice.h>
37#include <linux/delay.h>
38#include <linux/mlx4/driver.h>
39
40#include "mlx4_en.h"
41
42
43static int mlx4_en_test_registers(struct mlx4_en_priv *priv)
44{
45 return mlx4_cmd(dev: priv->mdev->dev, in_param: 0, in_modifier: 0, op_modifier: 0, op: MLX4_CMD_HW_HEALTH_CHECK,
46 timeout: MLX4_CMD_TIME_CLASS_A, native: MLX4_CMD_WRAPPED);
47}
48
49static int mlx4_en_test_loopback_xmit(struct mlx4_en_priv *priv)
50{
51 struct sk_buff *skb;
52 struct ethhdr *ethh;
53 unsigned char *packet;
54 unsigned int packet_size = MLX4_LOOPBACK_TEST_PAYLOAD;
55 unsigned int i;
56 int err;
57
58
59 /* build the pkt before xmit */
60 skb = netdev_alloc_skb(dev: priv->dev, MLX4_LOOPBACK_TEST_PAYLOAD + ETH_HLEN + NET_IP_ALIGN);
61 if (!skb)
62 return -ENOMEM;
63
64 skb_reserve(skb, NET_IP_ALIGN);
65
66 ethh = skb_put(skb, len: sizeof(struct ethhdr));
67 packet = skb_put(skb, len: packet_size);
68 memcpy(ethh->h_dest, priv->dev->dev_addr, ETH_ALEN);
69 eth_zero_addr(addr: ethh->h_source);
70 ethh->h_proto = htons(ETH_P_ARP);
71 skb_reset_mac_header(skb);
72 for (i = 0; i < packet_size; ++i) /* fill our packet */
73 packet[i] = (unsigned char)(i & 0xff);
74
75 /* xmit the pkt */
76 err = mlx4_en_xmit(skb, dev: priv->dev);
77 return err;
78}
79
80static int mlx4_en_test_loopback(struct mlx4_en_priv *priv)
81{
82 u32 loopback_ok = 0;
83 int i;
84
85 priv->loopback_ok = 0;
86 priv->validate_loopback = 1;
87
88 mlx4_en_update_loopback_state(dev: priv->dev, features: priv->dev->features);
89
90 /* xmit */
91 if (mlx4_en_test_loopback_xmit(priv)) {
92 en_err(priv, "Transmitting loopback packet failed\n");
93 goto mlx4_en_test_loopback_exit;
94 }
95
96 /* polling for result */
97 for (i = 0; i < MLX4_EN_LOOPBACK_RETRIES; ++i) {
98 msleep(MLX4_EN_LOOPBACK_TIMEOUT);
99 if (priv->loopback_ok) {
100 loopback_ok = 1;
101 break;
102 }
103 }
104 if (!loopback_ok)
105 en_err(priv, "Loopback packet didn't arrive\n");
106
107mlx4_en_test_loopback_exit:
108
109 priv->validate_loopback = 0;
110
111 mlx4_en_update_loopback_state(dev: priv->dev, features: priv->dev->features);
112 return !loopback_ok;
113}
114
115static int mlx4_en_test_interrupts(struct mlx4_en_priv *priv)
116{
117 struct mlx4_en_dev *mdev = priv->mdev;
118 int err = 0;
119 int i = 0;
120
121 err = mlx4_test_async(dev: mdev->dev);
122 /* When not in MSI_X or slave, test only async */
123 if (!(mdev->dev->flags & MLX4_FLAG_MSI_X) || mlx4_is_slave(dev: mdev->dev))
124 return err;
125
126 /* A loop over all completion vectors of current port,
127 * for each vector check whether it works by mapping command
128 * completions to that vector and performing a NOP command
129 */
130 for (i = 0; i < priv->rx_ring_num; i++) {
131 err = mlx4_test_interrupt(dev: mdev->dev, vector: priv->rx_cq[i]->vector);
132 if (err)
133 break;
134 }
135
136 return err;
137}
138
139static int mlx4_en_test_link(struct mlx4_en_priv *priv)
140{
141 if (mlx4_en_QUERY_PORT(mdev: priv->mdev, port: priv->port))
142 return -ENOMEM;
143 if (priv->port_state.link_state == 1)
144 return 0;
145 else
146 return 1;
147}
148
149static int mlx4_en_test_speed(struct mlx4_en_priv *priv)
150{
151
152 if (mlx4_en_QUERY_PORT(mdev: priv->mdev, port: priv->port))
153 return -ENOMEM;
154
155 /* The device supports 100M, 1G, 10G, 20G, 40G and 56G speed */
156 if (priv->port_state.link_speed != SPEED_100 &&
157 priv->port_state.link_speed != SPEED_1000 &&
158 priv->port_state.link_speed != SPEED_10000 &&
159 priv->port_state.link_speed != SPEED_20000 &&
160 priv->port_state.link_speed != SPEED_40000 &&
161 priv->port_state.link_speed != SPEED_56000)
162 return priv->port_state.link_speed;
163
164 return 0;
165}
166
167
168void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf)
169{
170 struct mlx4_en_priv *priv = netdev_priv(dev);
171 int i, carrier_ok;
172
173 memset(buf, 0, sizeof(u64) * MLX4_EN_NUM_SELF_TEST);
174
175 if (*flags & ETH_TEST_FL_OFFLINE) {
176 /* disable the interface */
177 carrier_ok = netif_carrier_ok(dev);
178
179 netif_carrier_off(dev);
180 /* Wait until all tx queues are empty.
181 * there should not be any additional incoming traffic
182 * since we turned the carrier off */
183 msleep(msecs: 200);
184
185 if (priv->mdev->dev->caps.flags &
186 MLX4_DEV_CAP_FLAG_UC_LOOPBACK) {
187 buf[3] = mlx4_en_test_registers(priv);
188 if (priv->port_up && dev->mtu >= MLX4_SELFTEST_LB_MIN_MTU)
189 buf[4] = mlx4_en_test_loopback(priv);
190 }
191
192 if (carrier_ok)
193 netif_carrier_on(dev);
194
195 }
196 buf[0] = mlx4_en_test_interrupts(priv);
197 buf[1] = mlx4_en_test_link(priv);
198 buf[2] = mlx4_en_test_speed(priv);
199
200 for (i = 0; i < MLX4_EN_NUM_SELF_TEST; i++) {
201 if (buf[i])
202 *flags |= ETH_TEST_FL_FAILED;
203 }
204}
205

source code of linux/drivers/net/ethernet/mellanox/mlx4/en_selftest.c