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 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 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 = (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 80 static 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"); 109 110 mlx4_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 } 120 121 122 static 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 } 131 132 static 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 } 149 150 151 void 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