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 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 81 static 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"); 106 107 mlx4_en_test_loopback_exit: 108 109 priv->validate_loopback = 0; 110 return !loopback_ok; 111 } 112 113 114 static 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 } 123 124 static 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 } 135 136 137 void 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); 151 retry_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 } 181