LXR linux/drivers/net/ethernet/mellanox/mlx4/en

   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
  43static 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
  49static 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
  80static 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
 107mlx4_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
 115static 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
 139static 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
 149static 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
 168void 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}
 205