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 = 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
  80 static 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
 107 mlx4_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
 115 static 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
 139 static 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
 149 static 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
 168 void 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 }