kernel/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, see <http://www.gnu.org/licenses/>.
  17
  18   The full GNU General Public License is included in this distribution in
  19   the file called "COPYING".
  20
  21   Contact Information:
  22   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24
  25 *******************************************************************************/
  26
  27 /* ethtool support for igbvf */
  28
  29 #include <linux/netdevice.h>
  30 #include <linux/ethtool.h>
  31 #include <linux/pci.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/delay.h>
  34
  35 #include "igbvf.h"
  36 #include <linux/if_vlan.h>
  37
  38 struct igbvf_stats {
  39         char stat_string[ETH_GSTRING_LEN];
  40         int sizeof_stat;
  41         int stat_offset;
  42         int base_stat_offset;
  43 };
  44
  45 #define IGBVF_STAT(current, base) \
  46                 sizeof(((struct igbvf_adapter *)0)->current), \
  47                 offsetof(struct igbvf_adapter, current), \
  48                 offsetof(struct igbvf_adapter, base)
  49
  50 static const struct igbvf_stats igbvf_gstrings_stats[] = {
  51         { "rx_packets", IGBVF_STAT(stats.gprc, stats.base_gprc) },
  52         { "tx_packets", IGBVF_STAT(stats.gptc, stats.base_gptc) },
  53         { "rx_bytes", IGBVF_STAT(stats.gorc, stats.base_gorc) },
  54         { "tx_bytes", IGBVF_STAT(stats.gotc, stats.base_gotc) },
  55         { "multicast", IGBVF_STAT(stats.mprc, stats.base_mprc) },
  56         { "lbrx_bytes", IGBVF_STAT(stats.gorlbc, stats.base_gorlbc) },
  57         { "lbrx_packets", IGBVF_STAT(stats.gprlbc, stats.base_gprlbc) },
  58         { "tx_restart_queue", IGBVF_STAT(restart_queue, zero_base) },
  59         { "rx_long_byte_count", IGBVF_STAT(stats.gorc, stats.base_gorc) },
  60         { "rx_csum_offload_good", IGBVF_STAT(hw_csum_good, zero_base) },
  61         { "rx_csum_offload_errors", IGBVF_STAT(hw_csum_err, zero_base) },
  62         { "rx_header_split", IGBVF_STAT(rx_hdr_split, zero_base) },
  63         { "alloc_rx_buff_failed", IGBVF_STAT(alloc_rx_buff_failed, zero_base) },
  64 };
  65
  66 #define IGBVF_GLOBAL_STATS_LEN ARRAY_SIZE(igbvf_gstrings_stats)
  67
  68 static const char igbvf_gstrings_test[][ETH_GSTRING_LEN] = {
  69         "Link test   (on/offline)"
  70 };
  71
  72 #define IGBVF_TEST_LEN ARRAY_SIZE(igbvf_gstrings_test)
  73
  74 static int igbvf_get_settings(struct net_device *netdev,
  75                               struct ethtool_cmd *ecmd)
  76 {
  77         struct igbvf_adapter *adapter = netdev_priv(netdev);
  78         struct e1000_hw *hw = &adapter->hw;
  79         u32 status;
  80
  81         ecmd->supported   = SUPPORTED_1000baseT_Full;
  82
  83         ecmd->advertising = ADVERTISED_1000baseT_Full;
  84
  85         ecmd->port = -1;
  86         ecmd->transceiver = XCVR_DUMMY1;
  87
  88         status = er32(STATUS);
  89         if (status & E1000_STATUS_LU) {
  90                 if (status & E1000_STATUS_SPEED_1000)
  91                         ethtool_cmd_speed_set(ecmd, SPEED_1000);
  92                 else if (status & E1000_STATUS_SPEED_100)
  93                         ethtool_cmd_speed_set(ecmd, SPEED_100);
  94                 else
  95                         ethtool_cmd_speed_set(ecmd, SPEED_10);
  96
  97                 if (status & E1000_STATUS_FD)
  98                         ecmd->duplex = DUPLEX_FULL;
  99                 else
 100                         ecmd->duplex = DUPLEX_HALF;
 101         } else {
 102                 ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
 103                 ecmd->duplex = DUPLEX_UNKNOWN;
 104         }
 105
 106         ecmd->autoneg = AUTONEG_DISABLE;
 107
 108         return 0;
 109 }
 110
 111 static int igbvf_set_settings(struct net_device *netdev,
 112                               struct ethtool_cmd *ecmd)
 113 {
 114         return -EOPNOTSUPP;
 115 }
 116
 117 static void igbvf_get_pauseparam(struct net_device *netdev,
 118                                  struct ethtool_pauseparam *pause)
 119 {
 120 }
 121
 122 static int igbvf_set_pauseparam(struct net_device *netdev,
 123                                 struct ethtool_pauseparam *pause)
 124 {
 125         return -EOPNOTSUPP;
 126 }
 127
 128 static u32 igbvf_get_msglevel(struct net_device *netdev)
 129 {
 130         struct igbvf_adapter *adapter = netdev_priv(netdev);
 131
 132         return adapter->msg_enable;
 133 }
 134
 135 static void igbvf_set_msglevel(struct net_device *netdev, u32 data)
 136 {
 137         struct igbvf_adapter *adapter = netdev_priv(netdev);
 138
 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_t(u32, ring->rx_pending, IGBVF_MIN_RXD);
 228         new_rx_count = min_t(u32, new_rx_count, IGBVF_MAX_RXD);
 229         new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);
 230
 231         new_tx_count = max_t(u32, ring->tx_pending, IGBVF_MIN_TXD);
 232         new_tx_count = min_t(u32, new_tx_count, 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                 usleep_range(1000, 2000);
 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         /* We can't just free everything and then setup again,
 259          * because the ISRs in MSI-X mode get passed pointers
 260          * to the Tx and Rx ring structs.
 261          */
 262         if (new_tx_count != adapter->tx_ring->count) {
 263                 memcpy(temp_ring, adapter->tx_ring, sizeof(struct igbvf_ring));
 264
 265                 temp_ring->count = new_tx_count;
 266                 err = igbvf_setup_tx_resources(adapter, temp_ring);
 267                 if (err)
 268                         goto err_setup;
 269
 270                 igbvf_free_tx_resources(adapter->tx_ring);
 271
 272                 memcpy(adapter->tx_ring, temp_ring, sizeof(struct igbvf_ring));
 273         }
 274
 275         if (new_rx_count != adapter->rx_ring->count) {
 276                 memcpy(temp_ring, adapter->rx_ring, sizeof(struct igbvf_ring));
 277
 278                 temp_ring->count = new_rx_count;
 279                 err = igbvf_setup_rx_resources(adapter, temp_ring);
 280                 if (err)
 281                         goto err_setup;
 282
 283                 igbvf_free_rx_resources(adapter->rx_ring);
 284
 285                 memcpy(adapter->rx_ring, temp_ring, sizeof(struct igbvf_ring));
 286         }
 287 err_setup:
 288         igbvf_up(adapter);
 289         vfree(temp_ring);
 290 clear_reset:
 291         clear_bit(__IGBVF_RESETTING, &adapter->state);
 292         return err;
 293 }
 294
 295 static int igbvf_link_test(struct igbvf_adapter *adapter, u64 *data)
 296 {
 297         struct e1000_hw *hw = &adapter->hw;
 298         *data = 0;
 299
 300         hw->mac.ops.check_for_link(hw);
 301
 302         if (!(er32(STATUS) & E1000_STATUS_LU))
 303                 *data = 1;
 304
 305         return *data;
 306 }
 307
 308 static void igbvf_diag_test(struct net_device *netdev,
 309                             struct ethtool_test *eth_test, u64 *data)
 310 {
 311         struct igbvf_adapter *adapter = netdev_priv(netdev);
 312
 313         set_bit(__IGBVF_TESTING, &adapter->state);
 314
 315         /* Link test performed before hardware reset so autoneg doesn't
 316          * interfere with test result
 317          */
 318         if (igbvf_link_test(adapter, &data[0]))
 319                 eth_test->flags |= ETH_TEST_FL_FAILED;
 320
 321         clear_bit(__IGBVF_TESTING, &adapter->state);
 322         msleep_interruptible(4 * 1000);
 323 }
 324
 325 static void igbvf_get_wol(struct net_device *netdev,
 326                           struct ethtool_wolinfo *wol)
 327 {
 328         wol->supported = 0;
 329         wol->wolopts = 0;
 330 }
 331
 332 static int igbvf_set_wol(struct net_device *netdev,
 333                          struct ethtool_wolinfo *wol)
 334 {
 335         return -EOPNOTSUPP;
 336 }
 337
 338 static int igbvf_get_coalesce(struct net_device *netdev,
 339                               struct ethtool_coalesce *ec)
 340 {
 341         struct igbvf_adapter *adapter = netdev_priv(netdev);
 342
 343         if (adapter->requested_itr <= 3)
 344                 ec->rx_coalesce_usecs = adapter->requested_itr;
 345         else
 346                 ec->rx_coalesce_usecs = adapter->current_itr >> 2;
 347
 348         return 0;
 349 }
 350
 351 static int igbvf_set_coalesce(struct net_device *netdev,
 352                               struct ethtool_coalesce *ec)
 353 {
 354         struct igbvf_adapter *adapter = netdev_priv(netdev);
 355         struct e1000_hw *hw = &adapter->hw;
 356
 357         if ((ec->rx_coalesce_usecs >= IGBVF_MIN_ITR_USECS) &&
 358             (ec->rx_coalesce_usecs <= IGBVF_MAX_ITR_USECS)) {
 359                 adapter->current_itr = ec->rx_coalesce_usecs << 2;
 360                 adapter->requested_itr = 1000000000 /
 361                                         (adapter->current_itr * 256);
 362         } else if ((ec->rx_coalesce_usecs == 3) ||
 363                    (ec->rx_coalesce_usecs == 2)) {
 364                 adapter->current_itr = IGBVF_START_ITR;
 365                 adapter->requested_itr = ec->rx_coalesce_usecs;
 366         } else if (ec->rx_coalesce_usecs == 0) {
 367                 /* The user's desire is to turn off interrupt throttling
 368                  * altogether, but due to HW limitations, we can't do that.
 369                  * Instead we set a very small value in EITR, which would
 370                  * allow ~967k interrupts per second, but allow the adapter's
 371                  * internal clocking to still function properly.
 372                  */
 373                 adapter->current_itr = 4;
 374                 adapter->requested_itr = 1000000000 /
 375                                         (adapter->current_itr * 256);
 376         } else {
 377                 return -EINVAL;
 378         }
 379
 380         writel(adapter->current_itr,
 381                hw->hw_addr + adapter->rx_ring->itr_register);
 382
 383         return 0;
 384 }
 385
 386 static int igbvf_nway_reset(struct net_device *netdev)
 387 {
 388         struct igbvf_adapter *adapter = netdev_priv(netdev);
 389
 390         if (netif_running(netdev))
 391                 igbvf_reinit_locked(adapter);
 392         return 0;
 393 }
 394
 395 static void igbvf_get_ethtool_stats(struct net_device *netdev,
 396                                     struct ethtool_stats *stats,
 397                                     u64 *data)
 398 {
 399         struct igbvf_adapter *adapter = netdev_priv(netdev);
 400         int i;
 401
 402         igbvf_update_stats(adapter);
 403         for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
 404                 char *p = (char *)adapter +
 405                           igbvf_gstrings_stats[i].stat_offset;
 406                 char *b = (char *)adapter +
 407                           igbvf_gstrings_stats[i].base_stat_offset;
 408                 data[i] = ((igbvf_gstrings_stats[i].sizeof_stat ==
 409                             sizeof(u64)) ? (*(u64 *)p - *(u64 *)b) :
 410                             (*(u32 *)p - *(u32 *)b));
 411         }
 412 }
 413
 414 static int igbvf_get_sset_count(struct net_device *dev, int stringset)
 415 {
 416         switch (stringset) {
 417         case ETH_SS_TEST:
 418                 return IGBVF_TEST_LEN;
 419         case ETH_SS_STATS:
 420                 return IGBVF_GLOBAL_STATS_LEN;
 421         default:
 422                 return -EINVAL;
 423         }
 424 }
 425
 426 static void igbvf_get_strings(struct net_device *netdev, u32 stringset,
 427                               u8 *data)
 428 {
 429         u8 *p = data;
 430         int i;
 431
 432         switch (stringset) {
 433         case ETH_SS_TEST:
 434                 memcpy(data, *igbvf_gstrings_test, sizeof(igbvf_gstrings_test));
 435                 break;
 436         case ETH_SS_STATS:
 437                 for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
 438                         memcpy(p, igbvf_gstrings_stats[i].stat_string,
 439                                ETH_GSTRING_LEN);
 440                         p += ETH_GSTRING_LEN;
 441                 }
 442                 break;
 443         }
 444 }
 445
 446 static const struct ethtool_ops igbvf_ethtool_ops = {
 447         .get_settings           = igbvf_get_settings,
 448         .set_settings           = igbvf_set_settings,
 449         .get_drvinfo            = igbvf_get_drvinfo,
 450         .get_regs_len           = igbvf_get_regs_len,
 451         .get_regs               = igbvf_get_regs,
 452         .get_wol                = igbvf_get_wol,
 453         .set_wol                = igbvf_set_wol,
 454         .get_msglevel           = igbvf_get_msglevel,
 455         .set_msglevel           = igbvf_set_msglevel,
 456         .nway_reset             = igbvf_nway_reset,
 457         .get_link               = ethtool_op_get_link,
 458         .get_eeprom_len         = igbvf_get_eeprom_len,
 459         .get_eeprom             = igbvf_get_eeprom,
 460         .set_eeprom             = igbvf_set_eeprom,
 461         .get_ringparam          = igbvf_get_ringparam,
 462         .set_ringparam          = igbvf_set_ringparam,
 463         .get_pauseparam         = igbvf_get_pauseparam,
 464         .set_pauseparam         = igbvf_set_pauseparam,
 465         .self_test              = igbvf_diag_test,
 466         .get_sset_count         = igbvf_get_sset_count,
 467         .get_strings            = igbvf_get_strings,
 468         .get_ethtool_stats      = igbvf_get_ethtool_stats,
 469         .get_coalesce           = igbvf_get_coalesce,
 470         .set_coalesce           = igbvf_set_coalesce,
 471 };
 472
 473 void igbvf_set_ethtool_ops(struct net_device *netdev)
 474 {
 475         netdev->ethtool_ops = &igbvf_ethtool_ops;
 476 }