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 
mlx4_en_test_registers(struct mlx4_en_priv * priv)43 static int mlx4_en_test_registers(struct mlx4_en_priv *priv)
44 {
45 	return mlx4_cmd(priv->mdev->dev, 0, 0, 0, MLX4_CMD_HW_HEALTH_CHECK,
46 			MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
47 }
48 
mlx4_en_test_loopback_xmit(struct mlx4_en_priv * priv)49 static 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(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, sizeof(struct ethhdr));
67 	packet = skb_put(skb, packet_size);
68 	memcpy(ethh->h_dest, priv->dev->dev_addr, ETH_ALEN);
69 	eth_zero_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, priv->dev);
77 	return err;
78 }
79 
mlx4_en_test_loopback(struct mlx4_en_priv * priv)80 static 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(priv->dev, 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 
107 mlx4_en_test_loopback_exit:
108 
109 	priv->validate_loopback = 0;
110 
111 	mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
112 	return !loopback_ok;
113 }
114 
mlx4_en_test_interrupts(struct mlx4_en_priv * priv)115 static 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(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(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(mdev->dev, priv->rx_cq[i]->vector);
132 		if (err)
133 			break;
134 	}
135 
136 	return err;
137 }
138 
mlx4_en_test_link(struct mlx4_en_priv * priv)139 static int mlx4_en_test_link(struct mlx4_en_priv *priv)
140 {
141 	if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
142 		return -ENOMEM;
143 	if (priv->port_state.link_state == 1)
144 		return 0;
145 	else
146 		return 1;
147 }
148 
mlx4_en_test_speed(struct mlx4_en_priv * priv)149 static int mlx4_en_test_speed(struct mlx4_en_priv *priv)
150 {
151 
152 	if (mlx4_en_QUERY_PORT(priv->mdev, 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 
mlx4_en_ex_selftest(struct net_device * dev,u32 * flags,u64 * buf)168 void 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(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