kernel/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  */
  53 static 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
 109 static 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
 128 static 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
 171 static 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
 195 static 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
 208 static 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
 250 static 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
 257 static 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
 264 static 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
 280 static 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
 292 static 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
 302 const 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 };