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                 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 }