drivers/net/ethernet/qualcomm/emac/emac-ethtool.c

   1 /* Copyright (c) 2016, The Linux Foundation. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  */
  12
  13 #include <linux/ethtool.h>
  14 #include <linux/phy.h>
  15
  16 #include "emac.h"
  17
  18 static const char * const emac_ethtool_stat_strings[] = {
  19         "rx_ok",
  20         "rx_bcast",
  21         "rx_mcast",
  22         "rx_pause",
  23         "rx_ctrl",
  24         "rx_fcs_err",
  25         "rx_len_err",
  26         "rx_byte_cnt",
  27         "rx_runt",
  28         "rx_frag",
  29         "rx_sz_64",
  30         "rx_sz_65_127",
  31         "rx_sz_128_255",
  32         "rx_sz_256_511",
  33         "rx_sz_512_1023",
  34         "rx_sz_1024_1518",
  35         "rx_sz_1519_max",
  36         "rx_sz_ov",
  37         "rx_rxf_ov",
  38         "rx_align_err",
  39         "rx_bcast_byte_cnt",
  40         "rx_mcast_byte_cnt",
  41         "rx_err_addr",
  42         "rx_crc_align",
  43         "rx_jabbers",
  44         "tx_ok",
  45         "tx_bcast",
  46         "tx_mcast",
  47         "tx_pause",
  48         "tx_exc_defer",
  49         "tx_ctrl",
  50         "tx_defer",
  51         "tx_byte_cnt",
  52         "tx_sz_64",
  53         "tx_sz_65_127",
  54         "tx_sz_128_255",
  55         "tx_sz_256_511",
  56         "tx_sz_512_1023",
  57         "tx_sz_1024_1518",
  58         "tx_sz_1519_max",
  59         "tx_1_col",
  60         "tx_2_col",
  61         "tx_late_col",
  62         "tx_abort_col",
  63         "tx_underrun",
  64         "tx_rd_eop",
  65         "tx_len_err",
  66         "tx_trunc",
  67         "tx_bcast_byte",
  68         "tx_mcast_byte",
  69         "tx_col",
  70 };
  71
  72 #define EMAC_STATS_LEN  ARRAY_SIZE(emac_ethtool_stat_strings)
  73
  74 static u32 emac_get_msglevel(struct net_device *netdev)
  75 {
  76         struct emac_adapter *adpt = netdev_priv(netdev);
  77
  78         return adpt->msg_enable;
  79 }
  80
  81 static void emac_set_msglevel(struct net_device *netdev, u32 data)
  82 {
  83         struct emac_adapter *adpt = netdev_priv(netdev);
  84
  85         adpt->msg_enable = data;
  86 }
  87
  88 static int emac_get_sset_count(struct net_device *netdev, int sset)
  89 {
  90         switch (sset) {
  91         case ETH_SS_STATS:
  92                 return EMAC_STATS_LEN;
  93         default:
  94                 return -EOPNOTSUPP;
  95         }
  96 }
  97
  98 static void emac_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
  99 {
 100         unsigned int i;
 101
 102         switch (stringset) {
 103         case ETH_SS_STATS:
 104                 for (i = 0; i < EMAC_STATS_LEN; i++) {
 105                         strlcpy(data, emac_ethtool_stat_strings[i],
 106                                 ETH_GSTRING_LEN);
 107                         data += ETH_GSTRING_LEN;
 108                 }
 109                 break;
 110         }
 111 }
 112
 113 static void emac_get_ethtool_stats(struct net_device *netdev,
 114                                    struct ethtool_stats *stats,
 115                                    u64 *data)
 116 {
 117         struct emac_adapter *adpt = netdev_priv(netdev);
 118
 119         spin_lock(&adpt->stats.lock);
 120
 121         emac_update_hw_stats(adpt);
 122         memcpy(data, &adpt->stats, EMAC_STATS_LEN * sizeof(u64));
 123
 124         spin_unlock(&adpt->stats.lock);
 125 }
 126
 127 static int emac_nway_reset(struct net_device *netdev)
 128 {
 129         struct phy_device *phydev = netdev->phydev;
 130
 131         if (!phydev)
 132                 return -ENODEV;
 133
 134         return genphy_restart_aneg(phydev);
 135 }
 136
 137 static void emac_get_ringparam(struct net_device *netdev,
 138                                struct ethtool_ringparam *ring)
 139 {
 140         struct emac_adapter *adpt = netdev_priv(netdev);
 141
 142         ring->rx_max_pending = EMAC_MAX_RX_DESCS;
 143         ring->tx_max_pending = EMAC_MAX_TX_DESCS;
 144         ring->rx_pending = adpt->rx_desc_cnt;
 145         ring->tx_pending = adpt->tx_desc_cnt;
 146 }
 147
 148 static int emac_set_ringparam(struct net_device *netdev,
 149                               struct ethtool_ringparam *ring)
 150 {
 151         struct emac_adapter *adpt = netdev_priv(netdev);
 152
 153         /* We don't have separate queues/rings for small/large frames, so
 154          * reject any attempt to specify those values separately.
 155          */
 156         if (ring->rx_mini_pending || ring->rx_jumbo_pending)
 157                 return -EINVAL;
 158
 159         adpt->tx_desc_cnt =
 160                 clamp_val(ring->tx_pending, EMAC_MIN_TX_DESCS, EMAC_MAX_TX_DESCS);
 161
 162         adpt->rx_desc_cnt =
 163                 clamp_val(ring->rx_pending, EMAC_MIN_RX_DESCS, EMAC_MAX_RX_DESCS);
 164
 165         if (netif_running(netdev))
 166                 return emac_reinit_locked(adpt);
 167
 168         return 0;
 169 }
 170
 171 static void emac_get_pauseparam(struct net_device *netdev,
 172                                 struct ethtool_pauseparam *pause)
 173 {
 174         struct emac_adapter *adpt = netdev_priv(netdev);
 175
 176         pause->autoneg = adpt->automatic ? AUTONEG_ENABLE : AUTONEG_DISABLE;
 177         pause->rx_pause = adpt->rx_flow_control ? 1 : 0;
 178         pause->tx_pause = adpt->tx_flow_control ? 1 : 0;
 179 }
 180
 181 static int emac_set_pauseparam(struct net_device *netdev,
 182                                struct ethtool_pauseparam *pause)
 183 {
 184         struct emac_adapter *adpt = netdev_priv(netdev);
 185
 186         adpt->automatic = pause->autoneg == AUTONEG_ENABLE;
 187         adpt->rx_flow_control = pause->rx_pause != 0;
 188         adpt->tx_flow_control = pause->tx_pause != 0;
 189
 190         if (netif_running(netdev))
 191                 return emac_reinit_locked(adpt);
 192
 193         return 0;
 194 }
 195
 196 /* Selected registers that might want to track during runtime. */
 197 static const u16 emac_regs[] = {
 198         EMAC_DMA_MAS_CTRL,
 199         EMAC_MAC_CTRL,
 200         EMAC_TXQ_CTRL_0,
 201         EMAC_RXQ_CTRL_0,
 202         EMAC_DMA_CTRL,
 203         EMAC_INT_MASK,
 204         EMAC_AXI_MAST_CTRL,
 205         EMAC_CORE_HW_VERSION,
 206         EMAC_MISC_CTRL,
 207 };
 208
 209 /* Every time emac_regs[] above is changed, increase this version number. */
 210 #define EMAC_REGS_VERSION       0
 211
 212 #define EMAC_MAX_REG_SIZE       ARRAY_SIZE(emac_regs)
 213
 214 static void emac_get_regs(struct net_device *netdev,
 215                           struct ethtool_regs *regs, void *buff)
 216 {
 217         struct emac_adapter *adpt = netdev_priv(netdev);
 218         u32 *val = buff;
 219         unsigned int i;
 220
 221         regs->version = EMAC_REGS_VERSION;
 222         regs->len = EMAC_MAX_REG_SIZE * sizeof(u32);
 223
 224         for (i = 0; i < EMAC_MAX_REG_SIZE; i++)
 225                 val[i] = readl(adpt->base + emac_regs[i]);
 226 }
 227
 228 static int emac_get_regs_len(struct net_device *netdev)
 229 {
 230         return EMAC_MAX_REG_SIZE * sizeof(u32);
 231 }
 232
 233 static const struct ethtool_ops emac_ethtool_ops = {
 234         .get_link_ksettings = phy_ethtool_get_link_ksettings,
 235         .set_link_ksettings = phy_ethtool_set_link_ksettings,
 236
 237         .get_msglevel    = emac_get_msglevel,
 238         .set_msglevel    = emac_set_msglevel,
 239
 240         .get_sset_count  = emac_get_sset_count,
 241         .get_strings = emac_get_strings,
 242         .get_ethtool_stats = emac_get_ethtool_stats,
 243
 244         .get_ringparam = emac_get_ringparam,
 245         .set_ringparam = emac_set_ringparam,
 246
 247         .get_pauseparam = emac_get_pauseparam,
 248         .set_pauseparam = emac_set_pauseparam,
 249
 250         .nway_reset = emac_nway_reset,
 251
 252         .get_link = ethtool_op_get_link,
 253
 254         .get_regs_len    = emac_get_regs_len,
 255         .get_regs        = emac_get_regs,
 256 };
 257
 258 void emac_set_ethtool_ops(struct net_device *netdev)
 259 {
 260         netdev->ethtool_ops = &emac_ethtool_ops;
 261 }