drivers/net/ethernet/intel/igbvf/ethtool.c

   1 /*******************************************************************************
   2
   3   Intel(R) 82576 Virtual Function Linux driver
   4   Copyright(c) 2009 - 2012 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28 /* ethtool support for igbvf */
  29
  30 #include <linux/netdevice.h>
  31 #include <linux/ethtool.h>
  32 #include <linux/pci.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/delay.h>
  35
  36 #include "igbvf.h"
  37 #include <linux/if_vlan.h>
  38
  39
  40 struct igbvf_stats {
  41         char stat_string[ETH_GSTRING_LEN];
  42         int sizeof_stat;
  43         int stat_offset;
  44         int base_stat_offset;
  45 };
  46
  47 #define IGBVF_STAT(current, base) \
  48                 sizeof(((struct igbvf_adapter *)0)->current), \
  49                 offsetof(struct igbvf_adapter, current), \
  50                 offsetof(struct igbvf_adapter, base)
  51
  52 static const struct igbvf_stats igbvf_gstrings_stats[] = {
  53         { "rx_packets", IGBVF_STAT(stats.gprc, stats.base_gprc) },
  54         { "tx_packets", IGBVF_STAT(stats.gptc, stats.base_gptc) },
  55         { "rx_bytes", IGBVF_STAT(stats.gorc, stats.base_gorc) },
  56         { "tx_bytes", IGBVF_STAT(stats.gotc, stats.base_gotc) },
  57         { "multicast", IGBVF_STAT(stats.mprc, stats.base_mprc) },
  58         { "lbrx_bytes", IGBVF_STAT(stats.gorlbc, stats.base_gorlbc) },
  59         { "lbrx_packets", IGBVF_STAT(stats.gprlbc, stats.base_gprlbc) },
  60         { "tx_restart_queue", IGBVF_STAT(restart_queue, zero_base) },
  61         { "rx_long_byte_count", IGBVF_STAT(stats.gorc, stats.base_gorc) },
  62         { "rx_csum_offload_good", IGBVF_STAT(hw_csum_good, zero_base) },
  63         { "rx_csum_offload_errors", IGBVF_STAT(hw_csum_err, zero_base) },
  64         { "rx_header_split", IGBVF_STAT(rx_hdr_split, zero_base) },
  65         { "alloc_rx_buff_failed", IGBVF_STAT(alloc_rx_buff_failed, zero_base) },
  66 };
  67
  68 #define IGBVF_GLOBAL_STATS_LEN ARRAY_SIZE(igbvf_gstrings_stats)
  69
  70 static const char igbvf_gstrings_test[][ETH_GSTRING_LEN] = {
  71         "Link test   (on/offline)"
  72 };
  73
  74 #define IGBVF_TEST_LEN ARRAY_SIZE(igbvf_gstrings_test)
  75
  76 static int igbvf_get_settings(struct net_device *netdev,
  77                               struct ethtool_cmd *ecmd)
  78 {
  79         struct igbvf_adapter *adapter = netdev_priv(netdev);
  80         struct e1000_hw *hw = &adapter->hw;
  81         u32 status;
  82
  83         ecmd->supported   = SUPPORTED_1000baseT_Full;
  84
  85         ecmd->advertising = ADVERTISED_1000baseT_Full;
  86
  87         ecmd->port = -1;
  88         ecmd->transceiver = XCVR_DUMMY1;
  89
  90         status = er32(STATUS);
  91         if (status & E1000_STATUS_LU) {
  92                 if (status & E1000_STATUS_SPEED_1000)
  93                         ethtool_cmd_speed_set(ecmd, SPEED_1000);
  94                 else if (status & E1000_STATUS_SPEED_100)
  95                         ethtool_cmd_speed_set(ecmd, SPEED_100);
  96                 else
  97                         ethtool_cmd_speed_set(ecmd, SPEED_10);
  98
  99                 if (status & E1000_STATUS_FD)
 100                         ecmd->duplex = DUPLEX_FULL;
 101                 else
 102                         ecmd->duplex = DUPLEX_HALF;
 103         } else {
 104                 ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
 105                 ecmd->duplex = DUPLEX_UNKNOWN;
 106         }
 107
 108         ecmd->autoneg = AUTONEG_DISABLE;
 109
 110         return 0;
 111 }
 112
 113 static int igbvf_set_settings(struct net_device *netdev,
 114                               struct ethtool_cmd *ecmd)
 115 {
 116         return -EOPNOTSUPP;
 117 }
 118
 119 static void igbvf_get_pauseparam(struct net_device *netdev,
 120                                  struct ethtool_pauseparam *pause)
 121 {
 122 }
 123
 124 static int igbvf_set_pauseparam(struct net_device *netdev,
 125                                 struct ethtool_pauseparam *pause)
 126 {
 127         return -EOPNOTSUPP;
 128 }
 129
 130 static u32 igbvf_get_msglevel(struct net_device *netdev)
 131 {
 132         struct igbvf_adapter *adapter = netdev_priv(netdev);
 133         return adapter->msg_enable;
 134 }
 135
 136 static void igbvf_set_msglevel(struct net_device *netdev, u32 data)
 137 {
 138         struct igbvf_adapter *adapter = netdev_priv(netdev);
 139         adapter->msg_enable = data;
 140 }
 141
 142 static int igbvf_get_regs_len(struct net_device *netdev)
 143 {
 144 #define IGBVF_REGS_LEN 8
 145         return IGBVF_REGS_LEN * sizeof(u32);
 146 }
 147
 148 static void igbvf_get_regs(struct net_device *netdev,
 149                            struct ethtool_regs *regs, void *p)
 150 {
 151         struct igbvf_adapter *adapter = netdev_priv(netdev);
 152         struct e1000_hw *hw = &adapter->hw;
 153         u32 *regs_buff = p;
 154
 155         memset(p, 0, IGBVF_REGS_LEN * sizeof(u32));
 156
 157         regs->version = (1 << 24) | (adapter->pdev->revision << 16) |
 158                         adapter->pdev->device;
 159
 160         regs_buff[0] = er32(CTRL);
 161         regs_buff[1] = er32(STATUS);
 162
 163         regs_buff[2] = er32(RDLEN(0));
 164         regs_buff[3] = er32(RDH(0));
 165         regs_buff[4] = er32(RDT(0));
 166
 167         regs_buff[5] = er32(TDLEN(0));
 168         regs_buff[6] = er32(TDH(0));
 169         regs_buff[7] = er32(TDT(0));
 170 }
 171
 172 static int igbvf_get_eeprom_len(struct net_device *netdev)
 173 {
 174         return 0;
 175 }
 176
 177 static int igbvf_get_eeprom(struct net_device *netdev,
 178                             struct ethtool_eeprom *eeprom, u8 *bytes)
 179 {
 180         return -EOPNOTSUPP;
 181 }
 182
 183 static int igbvf_set_eeprom(struct net_device *netdev,
 184                             struct ethtool_eeprom *eeprom, u8 *bytes)
 185 {
 186         return -EOPNOTSUPP;
 187 }
 188
 189 static void igbvf_get_drvinfo(struct net_device *netdev,
 190                               struct ethtool_drvinfo *drvinfo)
 191 {
 192         struct igbvf_adapter *adapter = netdev_priv(netdev);
 193
 194         strlcpy(drvinfo->driver,  igbvf_driver_name, sizeof(drvinfo->driver));
 195         strlcpy(drvinfo->version, igbvf_driver_version,
 196                 sizeof(drvinfo->version));
 197         strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
 198                 sizeof(drvinfo->bus_info));
 199         drvinfo->regdump_len = igbvf_get_regs_len(netdev);
 200         drvinfo->eedump_len = igbvf_get_eeprom_len(netdev);
 201 }
 202
 203 static void igbvf_get_ringparam(struct net_device *netdev,
 204                                 struct ethtool_ringparam *ring)
 205 {
 206         struct igbvf_adapter *adapter = netdev_priv(netdev);
 207         struct igbvf_ring *tx_ring = adapter->tx_ring;
 208         struct igbvf_ring *rx_ring = adapter->rx_ring;
 209
 210         ring->rx_max_pending = IGBVF_MAX_RXD;
 211         ring->tx_max_pending = IGBVF_MAX_TXD;
 212         ring->rx_pending = rx_ring->count;
 213         ring->tx_pending = tx_ring->count;
 214 }
 215
 216 static int igbvf_set_ringparam(struct net_device *netdev,
 217                                struct ethtool_ringparam *ring)
 218 {
 219         struct igbvf_adapter *adapter = netdev_priv(netdev);
 220         struct igbvf_ring *temp_ring;
 221         int err = 0;
 222         u32 new_rx_count, new_tx_count;
 223
 224         if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
 225                 return -EINVAL;
 226
 227         new_rx_count = max(ring->rx_pending, (u32)IGBVF_MIN_RXD);
 228         new_rx_count = min(new_rx_count, (u32)IGBVF_MAX_RXD);
 229         new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);
 230
 231         new_tx_count = max(ring->tx_pending, (u32)IGBVF_MIN_TXD);
 232         new_tx_count = min(new_tx_count, (u32)IGBVF_MAX_TXD);
 233         new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);
 234
 235         if ((new_tx_count == adapter->tx_ring->count) &&
 236             (new_rx_count == adapter->rx_ring->count)) {
 237                 /* nothing to do */
 238                 return 0;
 239         }
 240
 241         while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
 242                 msleep(1);
 243
 244         if (!netif_running(adapter->netdev)) {
 245                 adapter->tx_ring->count = new_tx_count;
 246                 adapter->rx_ring->count = new_rx_count;
 247                 goto clear_reset;
 248         }
 249
 250         temp_ring = vmalloc(sizeof(struct igbvf_ring));
 251         if (!temp_ring) {
 252                 err = -ENOMEM;
 253                 goto clear_reset;
 254         }
 255
 256         igbvf_down(adapter);
 257
 258         /*
 259          * We can't just free everything and then setup again,
 260          * because the ISRs in MSI-X mode get passed pointers
 261          * to the tx and rx ring structs.
 262          */
 263         if (new_tx_count != adapter->tx_ring->count) {
 264                 memcpy(temp_ring, adapter->tx_ring, sizeof(struct igbvf_ring));
 265
 266                 temp_ring->count = new_tx_count;
 267                 err = igbvf_setup_tx_resources(adapter, temp_ring);
 268                 if (err)
 269                         goto err_setup;
 270
 271                 igbvf_free_tx_resources(adapter->tx_ring);
 272
 273                 memcpy(adapter->tx_ring, temp_ring, sizeof(struct igbvf_ring));
 274         }
 275
 276         if (new_rx_count != adapter->rx_ring->count) {
 277                 memcpy(temp_ring, adapter->rx_ring, sizeof(struct igbvf_ring));
 278
 279                 temp_ring->count = new_rx_count;
 280                 err = igbvf_setup_rx_resources(adapter, temp_ring);
 281                 if (err)
 282                         goto err_setup;
 283
 284                 igbvf_free_rx_resources(adapter->rx_ring);
 285
 286                 memcpy(adapter->rx_ring, temp_ring,sizeof(struct igbvf_ring));
 287         }
 288 err_setup:
 289         igbvf_up(adapter);
 290         vfree(temp_ring);
 291 clear_reset:
 292         clear_bit(__IGBVF_RESETTING, &adapter->state);
 293         return err;
 294 }
 295
 296 static int igbvf_link_test(struct igbvf_adapter *adapter, u64 *data)
 297 {
 298         struct e1000_hw *hw = &adapter->hw;
 299         *data = 0;
 300
 301         hw->mac.ops.check_for_link(hw);
 302
 303         if (!(er32(STATUS) & E1000_STATUS_LU))
 304                 *data = 1;
 305
 306         return *data;
 307 }
 308
 309 static void igbvf_diag_test(struct net_device *netdev,
 310                             struct ethtool_test *eth_test, u64 *data)
 311 {
 312         struct igbvf_adapter *adapter = netdev_priv(netdev);
 313
 314         set_bit(__IGBVF_TESTING, &adapter->state);
 315
 316         /*
 317          * Link test performed before hardware reset so autoneg doesn't
 318          * interfere with test result
 319          */
 320         if (igbvf_link_test(adapter, &data[0]))
 321                 eth_test->flags |= ETH_TEST_FL_FAILED;
 322
 323         clear_bit(__IGBVF_TESTING, &adapter->state);
 324         msleep_interruptible(4 * 1000);
 325 }
 326
 327 static void igbvf_get_wol(struct net_device *netdev,
 328                           struct ethtool_wolinfo *wol)
 329 {
 330         wol->supported = 0;
 331         wol->wolopts = 0;
 332 }
 333
 334 static int igbvf_set_wol(struct net_device *netdev,
 335                          struct ethtool_wolinfo *wol)
 336 {
 337         return -EOPNOTSUPP;
 338 }
 339
 340 static int igbvf_get_coalesce(struct net_device *netdev,
 341                               struct ethtool_coalesce *ec)
 342 {
 343         struct igbvf_adapter *adapter = netdev_priv(netdev);
 344
 345         if (adapter->requested_itr <= 3)
 346                 ec->rx_coalesce_usecs = adapter->requested_itr;
 347         else
 348                 ec->rx_coalesce_usecs = adapter->current_itr >> 2;
 349
 350         return 0;
 351 }
 352
 353 static int igbvf_set_coalesce(struct net_device *netdev,
 354                               struct ethtool_coalesce *ec)
 355 {
 356         struct igbvf_adapter *adapter = netdev_priv(netdev);
 357         struct e1000_hw *hw = &adapter->hw;
 358
 359         if ((ec->rx_coalesce_usecs >= IGBVF_MIN_ITR_USECS) &&
 360              (ec->rx_coalesce_usecs <= IGBVF_MAX_ITR_USECS)) {
 361                 adapter->current_itr = ec->rx_coalesce_usecs << 2;
 362                 adapter->requested_itr = 1000000000 /
 363                                         (adapter->current_itr * 256);
 364         } else if ((ec->rx_coalesce_usecs == 3) ||
 365                    (ec->rx_coalesce_usecs == 2)) {
 366                 adapter->current_itr = IGBVF_START_ITR;
 367                 adapter->requested_itr = ec->rx_coalesce_usecs;
 368         } else if (ec->rx_coalesce_usecs == 0) {
 369                 /*
 370                  * The user's desire is to turn off interrupt throttling
 371                  * altogether, but due to HW limitations, we can't do that.
 372                  * Instead we set a very small value in EITR, which would
 373                  * allow ~967k interrupts per second, but allow the adapter's
 374                  * internal clocking to still function properly.
 375                  */
 376                 adapter->current_itr = 4;
 377                 adapter->requested_itr = 1000000000 /
 378                                         (adapter->current_itr * 256);
 379         } else
 380                 return -EINVAL;
 381
 382         writel(adapter->current_itr,
 383                hw->hw_addr + adapter->rx_ring->itr_register);
 384
 385         return 0;
 386 }
 387
 388 static int igbvf_nway_reset(struct net_device *netdev)
 389 {
 390         struct igbvf_adapter *adapter = netdev_priv(netdev);
 391         if (netif_running(netdev))
 392                 igbvf_reinit_locked(adapter);
 393         return 0;
 394 }
 395
 396
 397 static void igbvf_get_ethtool_stats(struct net_device *netdev,
 398                                     struct ethtool_stats *stats,
 399                                     u64 *data)
 400 {
 401         struct igbvf_adapter *adapter = netdev_priv(netdev);
 402         int i;
 403
 404         igbvf_update_stats(adapter);
 405         for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
 406                 char *p = (char *)adapter +
 407                           igbvf_gstrings_stats[i].stat_offset;
 408                 char *b = (char *)adapter +
 409                           igbvf_gstrings_stats[i].base_stat_offset;
 410                 data[i] = ((igbvf_gstrings_stats[i].sizeof_stat ==
 411                             sizeof(u64)) ? (*(u64 *)p - *(u64 *)b) :
 412                             (*(u32 *)p - *(u32 *)b));
 413         }
 414
 415 }
 416
 417 static int igbvf_get_sset_count(struct net_device *dev, int stringset)
 418 {
 419         switch(stringset) {
 420         case ETH_SS_TEST:
 421                 return IGBVF_TEST_LEN;
 422         case ETH_SS_STATS:
 423                 return IGBVF_GLOBAL_STATS_LEN;
 424         default:
 425                 return -EINVAL;
 426         }
 427 }
 428
 429 static void igbvf_get_strings(struct net_device *netdev, u32 stringset,
 430                               u8 *data)
 431 {
 432         u8 *p = data;
 433         int i;
 434
 435         switch (stringset) {
 436         case ETH_SS_TEST:
 437                 memcpy(data, *igbvf_gstrings_test, sizeof(igbvf_gstrings_test));
 438                 break;
 439         case ETH_SS_STATS:
 440                 for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
 441                         memcpy(p, igbvf_gstrings_stats[i].stat_string,
 442                                ETH_GSTRING_LEN);
 443                         p += ETH_GSTRING_LEN;
 444                 }
 445                 break;
 446         }
 447 }
 448
 449 static const struct ethtool_ops igbvf_ethtool_ops = {
 450         .get_settings           = igbvf_get_settings,
 451         .set_settings           = igbvf_set_settings,
 452         .get_drvinfo            = igbvf_get_drvinfo,
 453         .get_regs_len           = igbvf_get_regs_len,
 454         .get_regs               = igbvf_get_regs,
 455         .get_wol                = igbvf_get_wol,
 456         .set_wol                = igbvf_set_wol,
 457         .get_msglevel           = igbvf_get_msglevel,
 458         .set_msglevel           = igbvf_set_msglevel,
 459         .nway_reset             = igbvf_nway_reset,
 460         .get_link               = ethtool_op_get_link,
 461         .get_eeprom_len         = igbvf_get_eeprom_len,
 462         .get_eeprom             = igbvf_get_eeprom,
 463         .set_eeprom             = igbvf_set_eeprom,
 464         .get_ringparam          = igbvf_get_ringparam,
 465         .set_ringparam          = igbvf_set_ringparam,
 466         .get_pauseparam         = igbvf_get_pauseparam,
 467         .set_pauseparam         = igbvf_set_pauseparam,
 468         .self_test              = igbvf_diag_test,
 469         .get_sset_count         = igbvf_get_sset_count,
 470         .get_strings            = igbvf_get_strings,
 471         .get_ethtool_stats      = igbvf_get_ethtool_stats,
 472         .get_coalesce           = igbvf_get_coalesce,
 473         .set_coalesce           = igbvf_set_coalesce,
 474 };
 475
 476 void igbvf_set_ethtool_ops(struct net_device *netdev)
 477 {
 478         netdev->ethtool_ops = &igbvf_ethtool_ops;
 479 }