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);
 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		en_err(priv, "-LOOPBACK_TEST_XMIT- failed to create skb for xmit\n");
 63		return -ENOMEM;
 64	}
 65	skb_reserve(skb, NET_IP_ALIGN);
 66
 67	ethh = (struct ethhdr *)skb_put(skb, sizeof(struct ethhdr));
 68	packet	= (unsigned char *)skb_put(skb, packet_size);
 69	memcpy(ethh->h_dest, priv->dev->dev_addr, ETH_ALEN);
 70	memset(ethh->h_source, 0, ETH_ALEN);
 71	ethh->h_proto = htons(ETH_P_ARP);
 72	skb_set_mac_header(skb, 0);
 73	for (i = 0; i < packet_size; ++i)	/* fill our packet */
 74		packet[i] = (unsigned char)(i & 0xff);
 75
 76	/* xmit the pkt */
 77	err = mlx4_en_xmit(skb, priv->dev);
 78	return err;
 79}
 80
 81static int mlx4_en_test_loopback(struct mlx4_en_priv *priv)
 82{
 83	u32 loopback_ok = 0;
 84	int i;
 85
 86
 87        priv->loopback_ok = 0;
 88	priv->validate_loopback = 1;
 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	return !loopback_ok;
111}
112
113
114static int mlx4_en_test_link(struct mlx4_en_priv *priv)
115{
116	if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
117		return -ENOMEM;
118	if (priv->port_state.link_state == 1)
119		return 0;
120	else
121		return 1;
122}
123
124static int mlx4_en_test_speed(struct mlx4_en_priv *priv)
125{
126
127	if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
128		return -ENOMEM;
129
130	/* The device currently only supports 10G speed */
131	if (priv->port_state.link_speed != SPEED_10000)
132		return priv->port_state.link_speed;
133	return 0;
134}
135
136
137void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf)
138{
139	struct mlx4_en_priv *priv = netdev_priv(dev);
140	struct mlx4_en_dev *mdev = priv->mdev;
141	struct mlx4_en_tx_ring *tx_ring;
142	int i, carrier_ok;
143
144	memset(buf, 0, sizeof(u64) * MLX4_EN_NUM_SELF_TEST);
145
146	if (*flags & ETH_TEST_FL_OFFLINE) {
147		/* disable the interface */
148		carrier_ok = netif_carrier_ok(dev);
149
150		netif_carrier_off(dev);
151retry_tx:
152		/* Wait until all tx queues are empty.
153		 * there should not be any additional incoming traffic
154		 * since we turned the carrier off */
155		msleep(200);
156		for (i = 0; i < priv->tx_ring_num && carrier_ok; i++) {
157			tx_ring = &priv->tx_ring[i];
158			if (tx_ring->prod != (tx_ring->cons + tx_ring->last_nr_txbb))
159				goto retry_tx;
160		}
161
162		if (priv->mdev->dev->caps.flags &
163					MLX4_DEV_CAP_FLAG_UC_LOOPBACK) {
164			buf[3] = mlx4_en_test_registers(priv);
165			buf[4] = mlx4_en_test_loopback(priv);
166		}
167
168		if (carrier_ok)
169			netif_carrier_on(dev);
170
171	}
172	buf[0] = mlx4_test_interrupts(mdev->dev);
173	buf[1] = mlx4_en_test_link(priv);
174	buf[2] = mlx4_en_test_speed(priv);
175
176	for (i = 0; i < MLX4_EN_NUM_SELF_TEST; i++) {
177		if (buf[i])
178			*flags |= ETH_TEST_FL_FAILED;
179	}
180}