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 = 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 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 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 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(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 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