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(priv->mdev->dev, 0, 0, 0, MLX4_CMD_HW_HEALTH_CHECK,
46			MLX4_CMD_TIME_CLASS_A, 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(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 = (struct ethhdr *)skb_put(skb, sizeof(struct ethhdr));
67	packet	= (unsigned char *)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_set_mac_header(skb, 0);
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
80static int mlx4_en_test_loopback(struct mlx4_en_priv *priv)
81{
82	u32 loopback_ok = 0;
83	int i;
84	bool gro_enabled;
85
86        priv->loopback_ok = 0;
87	priv->validate_loopback = 1;
88	gro_enabled = priv->dev->features & NETIF_F_GRO;
89
90	mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
91	priv->dev->features &= ~NETIF_F_GRO;
92
93	/* xmit */
94	if (mlx4_en_test_loopback_xmit(priv)) {
95		en_err(priv, "Transmitting loopback packet failed\n");
96		goto mlx4_en_test_loopback_exit;
97	}
98
99	/* polling for result */
100	for (i = 0; i < MLX4_EN_LOOPBACK_RETRIES; ++i) {
101		msleep(MLX4_EN_LOOPBACK_TIMEOUT);
102		if (priv->loopback_ok) {
103			loopback_ok = 1;
104			break;
105		}
106	}
107	if (!loopback_ok)
108		en_err(priv, "Loopback packet didn't arrive\n");
109
110mlx4_en_test_loopback_exit:
111
112	priv->validate_loopback = 0;
113
114	if (gro_enabled)
115		priv->dev->features |= NETIF_F_GRO;
116
117	mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
118	return !loopback_ok;
119}
120
121
122static int mlx4_en_test_link(struct mlx4_en_priv *priv)
123{
124	if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
125		return -ENOMEM;
126	if (priv->port_state.link_state == 1)
127		return 0;
128	else
129		return 1;
130}
131
132static int mlx4_en_test_speed(struct mlx4_en_priv *priv)
133{
134
135	if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
136		return -ENOMEM;
137
138	/* The device supports 100M, 1G, 10G, 20G, 40G and 56G speed */
139	if (priv->port_state.link_speed != SPEED_100 &&
140	    priv->port_state.link_speed != SPEED_1000 &&
141	    priv->port_state.link_speed != SPEED_10000 &&
142	    priv->port_state.link_speed != SPEED_20000 &&
143	    priv->port_state.link_speed != SPEED_40000 &&
144	    priv->port_state.link_speed != SPEED_56000)
145		return priv->port_state.link_speed;
146
147	return 0;
148}
149
150
151void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf)
152{
153	struct mlx4_en_priv *priv = netdev_priv(dev);
154	struct mlx4_en_dev *mdev = priv->mdev;
155	int i, carrier_ok;
156
157	memset(buf, 0, sizeof(u64) * MLX4_EN_NUM_SELF_TEST);
158
159	if (*flags & ETH_TEST_FL_OFFLINE) {
160		/* disable the interface */
161		carrier_ok = netif_carrier_ok(dev);
162
163		netif_carrier_off(dev);
164		/* Wait until all tx queues are empty.
165		 * there should not be any additional incoming traffic
166		 * since we turned the carrier off */
167		msleep(200);
168
169		if (priv->mdev->dev->caps.flags &
170					MLX4_DEV_CAP_FLAG_UC_LOOPBACK) {
171			buf[3] = mlx4_en_test_registers(priv);
172			if (priv->port_up)
173				buf[4] = mlx4_en_test_loopback(priv);
174		}
175
176		if (carrier_ok)
177			netif_carrier_on(dev);
178
179	}
180	buf[0] = mlx4_test_interrupts(mdev->dev);
181	buf[1] = mlx4_en_test_link(priv);
182	buf[2] = mlx4_en_test_speed(priv);
183
184	for (i = 0; i < MLX4_EN_NUM_SELF_TEST; i++) {
185		if (buf[i])
186			*flags |= ETH_TEST_FL_FAILED;
187	}
188}
189