LXR linux/drivers/net/ethernet/atheros/alx/ethtool.c

   1/*
   2 * Copyright (c) 2013 Johannes Berg <johannes@sipsolutions.net>
   3 *
   4 *  This file is free software: you may copy, redistribute and/or modify it
   5 *  under the terms of the GNU General Public License as published by the
   6 *  Free Software Foundation, either version 2 of the License, or (at your
   7 *  option) any later version.
   8 *
   9 *  This file is distributed in the hope that it will be useful, but
  10 *  WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 *  General Public License for more details.
  13 *
  14 *  You should have received a copy of the GNU General Public License
  15 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 *
  17 * This file incorporates work covered by the following copyright and
  18 * permission notice:
  19 *
  20 * Copyright (c) 2012 Qualcomm Atheros, Inc.
  21 *
  22 * Permission to use, copy, modify, and/or distribute this software for any
  23 * purpose with or without fee is hereby granted, provided that the above
  24 * copyright notice and this permission notice appear in all copies.
  25 *
  26 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  27 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  28 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  29 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  30 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  31 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  32 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  33 */
  34
  35#include <linux/pci.h>
  36#include <linux/ip.h>
  37#include <linux/tcp.h>
  38#include <linux/netdevice.h>
  39#include <linux/etherdevice.h>
  40#include <linux/ethtool.h>
  41#include <linux/mdio.h>
  42#include <linux/interrupt.h>
  43#include <asm/byteorder.h>
  44
  45#include "alx.h"
  46#include "reg.h"
  47#include "hw.h"
  48
  49/* The order of these strings must match the order of the fields in
  50 * struct alx_hw_stats
  51 * See hw.h
  52 */
  53static const char alx_gstrings_stats[][ETH_GSTRING_LEN] = {
  54        "rx_packets",
  55        "rx_bcast_packets",
  56        "rx_mcast_packets",
  57        "rx_pause_packets",
  58        "rx_ctrl_packets",
  59        "rx_fcs_errors",
  60        "rx_length_errors",
  61        "rx_bytes",
  62        "rx_runt_packets",
  63        "rx_fragments",
  64        "rx_64B_or_less_packets",
  65        "rx_65B_to_127B_packets",
  66        "rx_128B_to_255B_packets",
  67        "rx_256B_to_511B_packets",
  68        "rx_512B_to_1023B_packets",
  69        "rx_1024B_to_1518B_packets",
  70        "rx_1519B_to_mtu_packets",
  71        "rx_oversize_packets",
  72        "rx_rxf_ov_drop_packets",
  73        "rx_rrd_ov_drop_packets",
  74        "rx_align_errors",
  75        "rx_bcast_bytes",
  76        "rx_mcast_bytes",
  77        "rx_address_errors",
  78        "tx_packets",
  79        "tx_bcast_packets",
  80        "tx_mcast_packets",
  81        "tx_pause_packets",
  82        "tx_exc_defer_packets",
  83        "tx_ctrl_packets",
  84        "tx_defer_packets",
  85        "tx_bytes",
  86        "tx_64B_or_less_packets",
  87        "tx_65B_to_127B_packets",
  88        "tx_128B_to_255B_packets",
  89        "tx_256B_to_511B_packets",
  90        "tx_512B_to_1023B_packets",
  91        "tx_1024B_to_1518B_packets",
  92        "tx_1519B_to_mtu_packets",
  93        "tx_single_collision",
  94        "tx_multiple_collisions",
  95        "tx_late_collision",
  96        "tx_abort_collision",
  97        "tx_underrun",
  98        "tx_trd_eop",
  99        "tx_length_errors",
 100        "tx_trunc_packets",
 101        "tx_bcast_bytes",
 102        "tx_mcast_bytes",
 103        "tx_update",
 104};
 105
 106#define ALX_NUM_STATS ARRAY_SIZE(alx_gstrings_stats)
 107
 108
 109static u32 alx_get_supported_speeds(struct alx_hw *hw)
 110{
 111        u32 supported = SUPPORTED_10baseT_Half |
 112                        SUPPORTED_10baseT_Full |
 113                        SUPPORTED_100baseT_Half |
 114                        SUPPORTED_100baseT_Full;
 115
 116        if (alx_hw_giga(hw))
 117                supported |= SUPPORTED_1000baseT_Full;
 118
 119        BUILD_BUG_ON(SUPPORTED_10baseT_Half != ADVERTISED_10baseT_Half);
 120        BUILD_BUG_ON(SUPPORTED_10baseT_Full != ADVERTISED_10baseT_Full);
 121        BUILD_BUG_ON(SUPPORTED_100baseT_Half != ADVERTISED_100baseT_Half);
 122        BUILD_BUG_ON(SUPPORTED_100baseT_Full != ADVERTISED_100baseT_Full);
 123        BUILD_BUG_ON(SUPPORTED_1000baseT_Full != ADVERTISED_1000baseT_Full);
 124
 125        return supported;
 126}
 127
 128static int alx_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 129{
 130        struct alx_priv *alx = netdev_priv(netdev);
 131        struct alx_hw *hw = &alx->hw;
 132
 133        ecmd->supported = SUPPORTED_Autoneg |
 134                          SUPPORTED_TP |
 135                          SUPPORTED_Pause |
 136                          SUPPORTED_Asym_Pause;
 137        if (alx_hw_giga(hw))
 138                ecmd->supported |= SUPPORTED_1000baseT_Full;
 139        ecmd->supported |= alx_get_supported_speeds(hw);
 140
 141        ecmd->advertising = ADVERTISED_TP;
 142        if (hw->adv_cfg & ADVERTISED_Autoneg)
 143                ecmd->advertising |= hw->adv_cfg;
 144
 145        ecmd->port = PORT_TP;
 146        ecmd->phy_address = 0;
 147
 148        if (hw->adv_cfg & ADVERTISED_Autoneg)
 149                ecmd->autoneg = AUTONEG_ENABLE;
 150        else
 151                ecmd->autoneg = AUTONEG_DISABLE;
 152        ecmd->transceiver = XCVR_INTERNAL;
 153
 154        if (hw->flowctrl & ALX_FC_ANEG && hw->adv_cfg & ADVERTISED_Autoneg) {
 155                if (hw->flowctrl & ALX_FC_RX) {
 156                        ecmd->advertising |= ADVERTISED_Pause;
 157
 158                        if (!(hw->flowctrl & ALX_FC_TX))
 159                                ecmd->advertising |= ADVERTISED_Asym_Pause;
 160                } else if (hw->flowctrl & ALX_FC_TX) {
 161                        ecmd->advertising |= ADVERTISED_Asym_Pause;
 162                }
 163        }
 164
 165        ethtool_cmd_speed_set(ecmd, hw->link_speed);
 166        ecmd->duplex = hw->duplex;
 167
 168        return 0;
 169}
 170
 171static int alx_set_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 172{
 173        struct alx_priv *alx = netdev_priv(netdev);
 174        struct alx_hw *hw = &alx->hw;
 175        u32 adv_cfg;
 176
 177        ASSERT_RTNL();
 178
 179        if (ecmd->autoneg == AUTONEG_ENABLE) {
 180                if (ecmd->advertising & ~alx_get_supported_speeds(hw))
 181                        return -EINVAL;
 182                adv_cfg = ecmd->advertising | ADVERTISED_Autoneg;
 183        } else {
 184                adv_cfg = alx_speed_to_ethadv(ethtool_cmd_speed(ecmd),
 185                                              ecmd->duplex);
 186
 187                if (!adv_cfg || adv_cfg == ADVERTISED_1000baseT_Full)
 188                        return -EINVAL;
 189        }
 190
 191        hw->adv_cfg = adv_cfg;
 192        return alx_setup_speed_duplex(hw, adv_cfg, hw->flowctrl);
 193}
 194
 195static void alx_get_pauseparam(struct net_device *netdev,
 196                               struct ethtool_pauseparam *pause)
 197{
 198        struct alx_priv *alx = netdev_priv(netdev);
 199        struct alx_hw *hw = &alx->hw;
 200
 201        pause->autoneg = !!(hw->flowctrl & ALX_FC_ANEG &&
 202                            hw->adv_cfg & ADVERTISED_Autoneg);
 203        pause->tx_pause = !!(hw->flowctrl & ALX_FC_TX);
 204        pause->rx_pause = !!(hw->flowctrl & ALX_FC_RX);
 205}
 206
 207
 208static int alx_set_pauseparam(struct net_device *netdev,
 209                              struct ethtool_pauseparam *pause)
 210{
 211        struct alx_priv *alx = netdev_priv(netdev);
 212        struct alx_hw *hw = &alx->hw;
 213        int err = 0;
 214        bool reconfig_phy = false;
 215        u8 fc = 0;
 216
 217        if (pause->tx_pause)
 218                fc |= ALX_FC_TX;
 219        if (pause->rx_pause)
 220                fc |= ALX_FC_RX;
 221        if (pause->autoneg)
 222                fc |= ALX_FC_ANEG;
 223
 224        ASSERT_RTNL();
 225
 226        /* restart auto-neg for auto-mode */
 227        if (hw->adv_cfg & ADVERTISED_Autoneg) {
 228                if (!((fc ^ hw->flowctrl) & ALX_FC_ANEG))
 229                        reconfig_phy = true;
 230                if (fc & hw->flowctrl & ALX_FC_ANEG &&
 231                    (fc ^ hw->flowctrl) & (ALX_FC_RX | ALX_FC_TX))
 232                        reconfig_phy = true;
 233        }
 234
 235        if (reconfig_phy) {
 236                err = alx_setup_speed_duplex(hw, hw->adv_cfg, fc);
 237                if (err)
 238                        return err;
 239        }
 240
 241        /* flow control on mac */
 242        if ((fc ^ hw->flowctrl) & (ALX_FC_RX | ALX_FC_TX))
 243                alx_cfg_mac_flowcontrol(hw, fc);
 244
 245        hw->flowctrl = fc;
 246
 247        return 0;
 248}
 249
 250static u32 alx_get_msglevel(struct net_device *netdev)
 251{
 252        struct alx_priv *alx = netdev_priv(netdev);
 253
 254        return alx->msg_enable;
 255}
 256
 257static void alx_set_msglevel(struct net_device *netdev, u32 data)
 258{
 259        struct alx_priv *alx = netdev_priv(netdev);
 260
 261        alx->msg_enable = data;
 262}
 263
 264static void alx_get_ethtool_stats(struct net_device *netdev,
 265                                  struct ethtool_stats *estats, u64 *data)
 266{
 267        struct alx_priv *alx = netdev_priv(netdev);
 268        struct alx_hw *hw = &alx->hw;
 269
 270        spin_lock(&alx->stats_lock);
 271
 272        alx_update_hw_stats(hw);
 273        BUILD_BUG_ON(sizeof(hw->stats) - offsetof(struct alx_hw_stats, rx_ok) <
 274                     ALX_NUM_STATS * sizeof(u64));
 275        memcpy(data, &hw->stats.rx_ok, ALX_NUM_STATS * sizeof(u64));
 276
 277        spin_unlock(&alx->stats_lock);
 278}
 279
 280static void alx_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
 281{
 282        switch (stringset) {
 283        case ETH_SS_STATS:
 284                memcpy(buf, &alx_gstrings_stats, sizeof(alx_gstrings_stats));
 285                break;
 286        default:
 287                WARN_ON(1);
 288                break;
 289        }
 290}
 291
 292static int alx_get_sset_count(struct net_device *netdev, int sset)
 293{
 294        switch (sset) {
 295        case ETH_SS_STATS:
 296                return ALX_NUM_STATS;
 297        default:
 298                return -EINVAL;
 299        }
 300}
 301
 302const struct ethtool_ops alx_ethtool_ops = {
 303        .get_settings   = alx_get_settings,
 304        .set_settings   = alx_set_settings,
 305        .get_pauseparam = alx_get_pauseparam,
 306        .set_pauseparam = alx_set_pauseparam,
 307        .get_msglevel   = alx_get_msglevel,
 308        .set_msglevel   = alx_set_msglevel,
 309        .get_link       = ethtool_op_get_link,
 310        .get_strings    = alx_get_strings,
 311        .get_sset_count = alx_get_sset_count,
 312        .get_ethtool_stats      = alx_get_ethtool_stats,
 313};
 314