drivers/net/ethernet/mellanox/mlx4/en_selftest.c

   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         memset(ethh->h_source, 0, ETH_ALEN);
  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
  85
  86         priv->loopback_ok = 0;
  87         priv->validate_loopback = 1;
  88
  89         mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
  90
  91         /* xmit */
  92         if (mlx4_en_test_loopback_xmit(priv)) {
  93                 en_err(priv, "Transmitting loopback packet failed\n");
  94                 goto mlx4_en_test_loopback_exit;
  95         }
  96
  97         /* polling for result */
  98         for (i = 0; i < MLX4_EN_LOOPBACK_RETRIES; ++i) {
  99                 msleep(MLX4_EN_LOOPBACK_TIMEOUT);
 100                 if (priv->loopback_ok) {
 101                         loopback_ok = 1;
 102                         break;
 103                 }
 104         }
 105         if (!loopback_ok)
 106                 en_err(priv, "Loopback packet didn't arrive\n");
 107
 108 mlx4_en_test_loopback_exit:
 109
 110         priv->validate_loopback = 0;
 111         mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
 112         return !loopback_ok;
 113 }
 114
 115
 116 static int mlx4_en_test_link(struct mlx4_en_priv *priv)
 117 {
 118         if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
 119                 return -ENOMEM;
 120         if (priv->port_state.link_state == 1)
 121                 return 0;
 122         else
 123                 return 1;
 124 }
 125
 126 static int mlx4_en_test_speed(struct mlx4_en_priv *priv)
 127 {
 128
 129         if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
 130                 return -ENOMEM;
 131
 132         /* The device supports 1G, 10G and 40G speeds */
 133         if (priv->port_state.link_speed != 1000 &&
 134             priv->port_state.link_speed != 10000 &&
 135             priv->port_state.link_speed != 40000)
 136                 return priv->port_state.link_speed;
 137         return 0;
 138 }
 139
 140
 141 void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf)
 142 {
 143         struct mlx4_en_priv *priv = netdev_priv(dev);
 144         struct mlx4_en_dev *mdev = priv->mdev;
 145         int i, carrier_ok;
 146
 147         memset(buf, 0, sizeof(u64) * MLX4_EN_NUM_SELF_TEST);
 148
 149         if (*flags & ETH_TEST_FL_OFFLINE) {
 150                 /* disable the interface */
 151                 carrier_ok = netif_carrier_ok(dev);
 152
 153                 netif_carrier_off(dev);
 154                 /* Wait until all tx queues are empty.
 155                  * there should not be any additional incoming traffic
 156                  * since we turned the carrier off */
 157                 msleep(200);
 158
 159                 if (priv->mdev->dev->caps.flags &
 160                                         MLX4_DEV_CAP_FLAG_UC_LOOPBACK) {
 161                         buf[3] = mlx4_en_test_registers(priv);
 162                         if (priv->port_up)
 163                                 buf[4] = mlx4_en_test_loopback(priv);
 164                 }
 165
 166                 if (carrier_ok)
 167                         netif_carrier_on(dev);
 168
 169         }
 170         buf[0] = mlx4_test_interrupts(mdev->dev);
 171         buf[1] = mlx4_en_test_link(priv);
 172         buf[2] = mlx4_en_test_speed(priv);
 173
 174         for (i = 0; i < MLX4_EN_NUM_SELF_TEST; i++) {
 175                 if (buf[i])
 176                         *flags |= ETH_TEST_FL_FAILED;
 177         }
 178 }