target/linux/ipq40xx/files/drivers/net/ethernet/qualcomm/essedma/edma_ethtool.c

   1 /*
   2  * Copyright (c) 2015 - 2016, The Linux Foundation. All rights reserved.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for
   5  * any purpose with or without fee is hereby granted, provided that the
   6  * above copyright notice and this permission notice appear in all copies.
   7  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   8  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   9  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  10  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  11  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  12  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  13  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  14  */
  15
  16 #include <linux/ethtool.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/string.h>
  19 #include "edma.h"
  20
  21 struct edma_ethtool_stats {
  22         uint8_t stat_string[ETH_GSTRING_LEN];
  23         uint32_t stat_offset;
  24 };
  25
  26 #define EDMA_STAT(m)    offsetof(struct edma_ethtool_statistics, m)
  27 #define DRVINFO_LEN     32
  28
  29 /* Array of strings describing statistics
  30  */
  31 static const struct edma_ethtool_stats edma_gstrings_stats[] = {
  32         {"tx_q0_pkt", EDMA_STAT(tx_q0_pkt)},
  33         {"tx_q1_pkt", EDMA_STAT(tx_q1_pkt)},
  34         {"tx_q2_pkt", EDMA_STAT(tx_q2_pkt)},
  35         {"tx_q3_pkt", EDMA_STAT(tx_q3_pkt)},
  36         {"tx_q4_pkt", EDMA_STAT(tx_q4_pkt)},
  37         {"tx_q5_pkt", EDMA_STAT(tx_q5_pkt)},
  38         {"tx_q6_pkt", EDMA_STAT(tx_q6_pkt)},
  39         {"tx_q7_pkt", EDMA_STAT(tx_q7_pkt)},
  40         {"tx_q8_pkt", EDMA_STAT(tx_q8_pkt)},
  41         {"tx_q9_pkt", EDMA_STAT(tx_q9_pkt)},
  42         {"tx_q10_pkt", EDMA_STAT(tx_q10_pkt)},
  43         {"tx_q11_pkt", EDMA_STAT(tx_q11_pkt)},
  44         {"tx_q12_pkt", EDMA_STAT(tx_q12_pkt)},
  45         {"tx_q13_pkt", EDMA_STAT(tx_q13_pkt)},
  46         {"tx_q14_pkt", EDMA_STAT(tx_q14_pkt)},
  47         {"tx_q15_pkt", EDMA_STAT(tx_q15_pkt)},
  48         {"tx_q0_byte", EDMA_STAT(tx_q0_byte)},
  49         {"tx_q1_byte", EDMA_STAT(tx_q1_byte)},
  50         {"tx_q2_byte", EDMA_STAT(tx_q2_byte)},
  51         {"tx_q3_byte", EDMA_STAT(tx_q3_byte)},
  52         {"tx_q4_byte", EDMA_STAT(tx_q4_byte)},
  53         {"tx_q5_byte", EDMA_STAT(tx_q5_byte)},
  54         {"tx_q6_byte", EDMA_STAT(tx_q6_byte)},
  55         {"tx_q7_byte", EDMA_STAT(tx_q7_byte)},
  56         {"tx_q8_byte", EDMA_STAT(tx_q8_byte)},
  57         {"tx_q9_byte", EDMA_STAT(tx_q9_byte)},
  58         {"tx_q10_byte", EDMA_STAT(tx_q10_byte)},
  59         {"tx_q11_byte", EDMA_STAT(tx_q11_byte)},
  60         {"tx_q12_byte", EDMA_STAT(tx_q12_byte)},
  61         {"tx_q13_byte", EDMA_STAT(tx_q13_byte)},
  62         {"tx_q14_byte", EDMA_STAT(tx_q14_byte)},
  63         {"tx_q15_byte", EDMA_STAT(tx_q15_byte)},
  64         {"rx_q0_pkt", EDMA_STAT(rx_q0_pkt)},
  65         {"rx_q1_pkt", EDMA_STAT(rx_q1_pkt)},
  66         {"rx_q2_pkt", EDMA_STAT(rx_q2_pkt)},
  67         {"rx_q3_pkt", EDMA_STAT(rx_q3_pkt)},
  68         {"rx_q4_pkt", EDMA_STAT(rx_q4_pkt)},
  69         {"rx_q5_pkt", EDMA_STAT(rx_q5_pkt)},
  70         {"rx_q6_pkt", EDMA_STAT(rx_q6_pkt)},
  71         {"rx_q7_pkt", EDMA_STAT(rx_q7_pkt)},
  72         {"rx_q0_byte", EDMA_STAT(rx_q0_byte)},
  73         {"rx_q1_byte", EDMA_STAT(rx_q1_byte)},
  74         {"rx_q2_byte", EDMA_STAT(rx_q2_byte)},
  75         {"rx_q3_byte", EDMA_STAT(rx_q3_byte)},
  76         {"rx_q4_byte", EDMA_STAT(rx_q4_byte)},
  77         {"rx_q5_byte", EDMA_STAT(rx_q5_byte)},
  78         {"rx_q6_byte", EDMA_STAT(rx_q6_byte)},
  79         {"rx_q7_byte", EDMA_STAT(rx_q7_byte)},
  80         {"tx_desc_error", EDMA_STAT(tx_desc_error)},
  81         {"rx_alloc_fail_ctr", EDMA_STAT(rx_alloc_fail_ctr)},
  82 };
  83
  84 #define EDMA_STATS_LEN ARRAY_SIZE(edma_gstrings_stats)
  85
  86 /* edma_get_strset_count()
  87  *      Get strset count
  88  */
  89 static int edma_get_strset_count(struct net_device *netdev,
  90                                  int sset)
  91 {
  92         switch (sset) {
  93         case ETH_SS_STATS:
  94                 return EDMA_STATS_LEN;
  95         default:
  96                 netdev_dbg(netdev, "%s: Invalid string set", __func__);
  97                 return -EOPNOTSUPP;
  98         }
  99 }
 100
 101
 102 /* edma_get_strings()
 103  *      get stats string
 104  */
 105 static void edma_get_strings(struct net_device *netdev, uint32_t stringset,
 106                              uint8_t *data)
 107 {
 108         uint8_t *p = data;
 109         uint32_t i;
 110
 111         switch (stringset) {
 112         case ETH_SS_STATS:
 113                 for (i = 0; i < EDMA_STATS_LEN; i++) {
 114                         memcpy(p, edma_gstrings_stats[i].stat_string,
 115                                 min((size_t)ETH_GSTRING_LEN,
 116                                     strlen(edma_gstrings_stats[i].stat_string)
 117                                     + 1));
 118                         p += ETH_GSTRING_LEN;
 119                 }
 120                 break;
 121         }
 122 }
 123
 124 /* edma_get_ethtool_stats()
 125  *      Get ethtool statistics
 126  */
 127 static void edma_get_ethtool_stats(struct net_device *netdev,
 128                                    struct ethtool_stats *stats, uint64_t *data)
 129 {
 130         struct edma_adapter *adapter = netdev_priv(netdev);
 131         struct edma_common_info *edma_cinfo = adapter->edma_cinfo;
 132         int i;
 133         uint8_t *p = NULL;
 134
 135         edma_read_append_stats(edma_cinfo);
 136
 137         for(i = 0; i < EDMA_STATS_LEN; i++) {
 138                 p = (uint8_t *)&(edma_cinfo->edma_ethstats) +
 139                         edma_gstrings_stats[i].stat_offset;
 140                 data[i] = *(uint32_t *)p;
 141         }
 142 }
 143
 144 /* edma_get_drvinfo()
 145  *      get edma driver info
 146  */
 147 static void edma_get_drvinfo(struct net_device *dev,
 148                              struct ethtool_drvinfo *info)
 149 {
 150         strlcpy(info->driver, "ess_edma", DRVINFO_LEN);
 151         strlcpy(info->bus_info, "axi", ETHTOOL_BUSINFO_LEN);
 152 }
 153
 154 /* edma_nway_reset()
 155  *      Reset the phy, if available.
 156  */
 157 static int edma_nway_reset(struct net_device *netdev)
 158 {
 159         return -EINVAL;
 160 }
 161
 162 /* edma_get_wol()
 163  *      get wake on lan info
 164  */
 165 static void edma_get_wol(struct net_device *netdev,
 166                          struct ethtool_wolinfo *wol)
 167 {
 168         wol->supported = 0;
 169         wol->wolopts = 0;
 170 }
 171
 172 /* edma_get_msglevel()
 173  *      get message level.
 174  */
 175 static uint32_t edma_get_msglevel(struct net_device *netdev)
 176 {
 177         return 0;
 178 }
 179
 180 /* edma_get_settings()
 181  *      Get edma settings
 182  */
 183 static int edma_get_settings(struct net_device *netdev,
 184                              struct ethtool_link_ksettings *cmd)
 185 {
 186         struct edma_adapter *adapter = netdev_priv(netdev);
 187
 188         if (adapter->poll_required) {
 189                 if ((adapter->forced_speed != SPEED_UNKNOWN)
 190                         && !(adapter->poll_required))
 191                         return -EPERM;
 192
 193                 phy_ethtool_ksettings_get(adapter->phydev, cmd);
 194                 if (linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, adapter->phydev->advertising))
 195                         cmd->base.port = PORT_FIBRE;
 196                 else
 197                         cmd->base.port = PORT_TP;
 198         } else {
 199                 /* If the speed/duplex for this GMAC is forced and we
 200                  * are not polling for link state changes, return the
 201                  * values as specified by platform. This will be true
 202                  * for GMACs connected to switch, and interfaces that
 203                  * do not use a PHY.
 204                  */
 205                 if (!(adapter->poll_required)) {
 206                         if (adapter->forced_speed != SPEED_UNKNOWN) {
 207                                 /* set speed and duplex */
 208                                 cmd->base.speed = SPEED_1000;
 209                                 cmd->base.duplex = DUPLEX_FULL;
 210
 211                                 /* Populate capabilities advertised by self */
 212                                 linkmode_zero(cmd->link_modes.advertising);
 213                                 cmd->base.autoneg = 0;
 214                                 cmd->base.port = PORT_TP;
 215                                 cmd->base.transceiver = XCVR_EXTERNAL;
 216                         } else {
 217                                 /* non link polled and non
 218                                  * forced speed/duplex interface
 219                                  */
 220                                 return -EIO;
 221                         }
 222                 }
 223         }
 224
 225         return 0;
 226 }
 227
 228 /* edma_set_settings()
 229  *      Set EDMA settings
 230  */
 231 static int edma_set_settings(struct net_device *netdev,
 232                             const struct ethtool_link_ksettings *cmd)
 233 {
 234         struct edma_adapter *adapter = netdev_priv(netdev);
 235
 236         if ((adapter->forced_speed != SPEED_UNKNOWN) &&
 237              !adapter->poll_required)
 238                 return -EPERM;
 239
 240         return phy_ethtool_ksettings_set(adapter->phydev, cmd);
 241 }
 242
 243 /* edma_get_coalesce
 244  *      get interrupt mitigation
 245  */
 246 static int edma_get_coalesce(struct net_device *netdev,
 247                              struct ethtool_coalesce *ec)
 248 {
 249         u32 reg_val;
 250
 251         edma_get_tx_rx_coalesce(&reg_val);
 252
 253         /* We read the Interrupt Moderation Timer(IMT) register value,
 254          * use lower 16 bit for rx and higher 16 bit for Tx. We do a
 255          * left shift by 1, because IMT resolution timer is 2usecs.
 256          * Hence the value given by the register is multiplied by 2 to
 257          * get the actual time in usecs.
 258          */
 259         ec->tx_coalesce_usecs = (((reg_val >> 16) & 0xffff) << 1);
 260         ec->rx_coalesce_usecs = ((reg_val & 0xffff) << 1);
 261
 262         return 0;
 263 }
 264
 265 /* edma_set_coalesce
 266  *      set interrupt mitigation
 267  */
 268 static int edma_set_coalesce(struct net_device *netdev,
 269                              struct ethtool_coalesce *ec)
 270 {
 271         if (ec->tx_coalesce_usecs)
 272                 edma_change_tx_coalesce(ec->tx_coalesce_usecs);
 273         if (ec->rx_coalesce_usecs)
 274                 edma_change_rx_coalesce(ec->rx_coalesce_usecs);
 275
 276         return 0;
 277 }
 278
 279 /* edma_set_priv_flags()
 280  *      Set EDMA private flags
 281  */
 282 static int edma_set_priv_flags(struct net_device *netdev, u32 flags)
 283 {
 284         return 0;
 285 }
 286
 287 /* edma_get_priv_flags()
 288  *      get edma driver flags
 289  */
 290 static u32 edma_get_priv_flags(struct net_device *netdev)
 291 {
 292         return 0;
 293 }
 294
 295 /* edma_get_ringparam()
 296  *      get ring size
 297  */
 298 static void edma_get_ringparam(struct net_device *netdev,
 299                                struct ethtool_ringparam *ring)
 300 {
 301         struct edma_adapter *adapter = netdev_priv(netdev);
 302         struct edma_common_info *edma_cinfo = adapter->edma_cinfo;
 303
 304         ring->tx_max_pending = edma_cinfo->tx_ring_count;
 305         ring->rx_max_pending = edma_cinfo->rx_ring_count;
 306 }
 307
 308 /* Ethtool operations
 309  */
 310 static const struct ethtool_ops edma_ethtool_ops = {
 311         .get_drvinfo = &edma_get_drvinfo,
 312         .get_link = &ethtool_op_get_link,
 313         .get_msglevel = &edma_get_msglevel,
 314         .nway_reset = &edma_nway_reset,
 315         .get_wol = &edma_get_wol,
 316         .get_link_ksettings = &edma_get_settings,
 317         .set_link_ksettings = &edma_set_settings,
 318         .get_strings = &edma_get_strings,
 319         .get_sset_count = &edma_get_strset_count,
 320         .get_ethtool_stats = &edma_get_ethtool_stats,
 321         .get_coalesce = &edma_get_coalesce,
 322         .set_coalesce = &edma_set_coalesce,
 323         .get_priv_flags = edma_get_priv_flags,
 324         .set_priv_flags = edma_set_priv_flags,
 325         .get_ringparam = edma_get_ringparam,
 326 };
 327
 328 /* edma_set_ethtool_ops
 329  *      Set ethtool operations
 330  */
 331 void edma_set_ethtool_ops(struct net_device *netdev)
 332 {
 333         netdev->ethtool_ops = &edma_ethtool_ops;
 334 }