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1/*2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * 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 = 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 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(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 107mlx4_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 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(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 command128 * completions to that vector and performing a NOP command129 */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 139static 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 else146 return 1;147}148 149static 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 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 traffic182 * 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