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_link_ksettings(struct net_device *netdev,
  75                                     struct ethtool_link_ksettings *cmd)
  76 {
  77         struct igbvf_adapter *adapter = netdev_priv(netdev);
  78         struct e1000_hw *hw = &adapter->hw;
  79         u32 status;
  80
  81         ethtool_link_ksettings_zero_link_mode(cmd, supported);
  82         ethtool_link_ksettings_add_link_mode(cmd, supported, 1000baseT_Full);
  83         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
  84         ethtool_link_ksettings_add_link_mode(cmd, advertising, 1000baseT_Full);
  85
  86         cmd->base.port = -1;
  87
  88         status = er32(STATUS);
  89         if (status & E1000_STATUS_LU) {
  90                 if (status & E1000_STATUS_SPEED_1000)
  91                         cmd->base.speed = SPEED_1000;
  92                 else if (status & E1000_STATUS_SPEED_100)
  93                         cmd->base.speed = SPEED_100;
  94                 else
  95                         cmd->base.speed = SPEED_10;
  96
  97                 if (status & E1000_STATUS_FD)
  98                         cmd->base.duplex = DUPLEX_FULL;
  99                 else
 100                         cmd->base.duplex = DUPLEX_HALF;
 101         } else {
 102                 cmd->base.speed = SPEED_UNKNOWN;
 103                 cmd->base.duplex = DUPLEX_UNKNOWN;
 104         }
 105
 106         cmd->base.autoneg = AUTONEG_DISABLE;
 107
 108         return 0;
 109 }
 110
 111 static int igbvf_set_link_ksettings(struct net_device *netdev,
 112                                     const struct ethtool_link_ksettings *cmd)
 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 = (1u << 24) |
 158                         (adapter->pdev->revision << 16) |
 159                         adapter->pdev->device;
 160
 161         regs_buff[0] = er32(CTRL);
 162         regs_buff[1] = er32(STATUS);
 163
 164         regs_buff[2] = er32(RDLEN(0));
 165         regs_buff[3] = er32(RDH(0));
 166         regs_buff[4] = er32(RDT(0));
 167
 168         regs_buff[5] = er32(TDLEN(0));
 169         regs_buff[6] = er32(TDH(0));
 170         regs_buff[7] = er32(TDT(0));
 171 }
 172
 173 static int igbvf_get_eeprom_len(struct net_device *netdev)
 174 {
 175         return 0;
 176 }
 177
 178 static int igbvf_get_eeprom(struct net_device *netdev,
 179                             struct ethtool_eeprom *eeprom, u8 *bytes)
 180 {
 181         return -EOPNOTSUPP;
 182 }
 183
 184 static int igbvf_set_eeprom(struct net_device *netdev,
 185                             struct ethtool_eeprom *eeprom, u8 *bytes)
 186 {
 187         return -EOPNOTSUPP;
 188 }
 189
 190 static void igbvf_get_drvinfo(struct net_device *netdev,
 191                               struct ethtool_drvinfo *drvinfo)
 192 {
 193         struct igbvf_adapter *adapter = netdev_priv(netdev);
 194
 195         strlcpy(drvinfo->driver,  igbvf_driver_name, sizeof(drvinfo->driver));
 196         strlcpy(drvinfo->version, igbvf_driver_version,
 197                 sizeof(drvinfo->version));
 198         strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
 199                 sizeof(drvinfo->bus_info));
 200 }
 201
 202 static void igbvf_get_ringparam(struct net_device *netdev,
 203                                 struct ethtool_ringparam *ring)
 204 {
 205         struct igbvf_adapter *adapter = netdev_priv(netdev);
 206         struct igbvf_ring *tx_ring = adapter->tx_ring;
 207         struct igbvf_ring *rx_ring = adapter->rx_ring;
 208
 209         ring->rx_max_pending = IGBVF_MAX_RXD;
 210         ring->tx_max_pending = IGBVF_MAX_TXD;
 211         ring->rx_pending = rx_ring->count;
 212         ring->tx_pending = tx_ring->count;
 213 }
 214
 215 static int igbvf_set_ringparam(struct net_device *netdev,
 216                                struct ethtool_ringparam *ring)
 217 {
 218         struct igbvf_adapter *adapter = netdev_priv(netdev);
 219         struct igbvf_ring *temp_ring;
 220         int err = 0;
 221         u32 new_rx_count, new_tx_count;
 222
 223         if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
 224                 return -EINVAL;
 225
 226         new_rx_count = max_t(u32, ring->rx_pending, IGBVF_MIN_RXD);
 227         new_rx_count = min_t(u32, new_rx_count, IGBVF_MAX_RXD);
 228         new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);
 229
 230         new_tx_count = max_t(u32, ring->tx_pending, IGBVF_MIN_TXD);
 231         new_tx_count = min_t(u32, new_tx_count, IGBVF_MAX_TXD);
 232         new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);
 233
 234         if ((new_tx_count == adapter->tx_ring->count) &&
 235             (new_rx_count == adapter->rx_ring->count)) {
 236                 /* nothing to do */
 237                 return 0;
 238         }
 239
 240         while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
 241                 usleep_range(1000, 2000);
 242
 243         if (!netif_running(adapter->netdev)) {
 244                 adapter->tx_ring->count = new_tx_count;
 245                 adapter->rx_ring->count = new_rx_count;
 246                 goto clear_reset;
 247         }
 248
 249         temp_ring = vmalloc(sizeof(struct igbvf_ring));
 250         if (!temp_ring) {
 251                 err = -ENOMEM;
 252                 goto clear_reset;
 253         }
 254
 255         igbvf_down(adapter);
 256
 257         /* We can't just free everything and then setup again,
 258          * because the ISRs in MSI-X mode get passed pointers
 259          * to the Tx and Rx ring structs.
 260          */
 261         if (new_tx_count != adapter->tx_ring->count) {
 262                 memcpy(temp_ring, adapter->tx_ring, sizeof(struct igbvf_ring));
 263
 264                 temp_ring->count = new_tx_count;
 265                 err = igbvf_setup_tx_resources(adapter, temp_ring);
 266                 if (err)
 267                         goto err_setup;
 268
 269                 igbvf_free_tx_resources(adapter->tx_ring);
 270
 271                 memcpy(adapter->tx_ring, temp_ring, sizeof(struct igbvf_ring));
 272         }
 273
 274         if (new_rx_count != adapter->rx_ring->count) {
 275                 memcpy(temp_ring, adapter->rx_ring, sizeof(struct igbvf_ring));
 276
 277                 temp_ring->count = new_rx_count;
 278                 err = igbvf_setup_rx_resources(adapter, temp_ring);
 279                 if (err)
 280                         goto err_setup;
 281
 282                 igbvf_free_rx_resources(adapter->rx_ring);
 283
 284                 memcpy(adapter->rx_ring, temp_ring, sizeof(struct igbvf_ring));
 285         }
 286 err_setup:
 287         igbvf_up(adapter);
 288         vfree(temp_ring);
 289 clear_reset:
 290         clear_bit(__IGBVF_RESETTING, &adapter->state);
 291         return err;
 292 }
 293
 294 static int igbvf_link_test(struct igbvf_adapter *adapter, u64 *data)
 295 {
 296         struct e1000_hw *hw = &adapter->hw;
 297         *data = 0;
 298
 299         spin_lock_bh(&hw->mbx_lock);
 300
 301         hw->mac.ops.check_for_link(hw);
 302
 303         spin_unlock_bh(&hw->mbx_lock);
 304
 305         if (!(er32(STATUS) & E1000_STATUS_LU))
 306                 *data = 1;
 307
 308         return *data;
 309 }
 310
 311 static void igbvf_diag_test(struct net_device *netdev,
 312                             struct ethtool_test *eth_test, u64 *data)
 313 {
 314         struct igbvf_adapter *adapter = netdev_priv(netdev);
 315
 316         set_bit(__IGBVF_TESTING, &adapter->state);
 317
 318         /* Link test performed before hardware reset so autoneg doesn't
 319          * interfere with test result
 320          */
 321         if (igbvf_link_test(adapter, &data[0]))
 322                 eth_test->flags |= ETH_TEST_FL_FAILED;
 323
 324         clear_bit(__IGBVF_TESTING, &adapter->state);
 325         msleep_interruptible(4 * 1000);
 326 }
 327
 328 static void igbvf_get_wol(struct net_device *netdev,
 329                           struct ethtool_wolinfo *wol)
 330 {
 331         wol->supported = 0;
 332         wol->wolopts = 0;
 333 }
 334
 335 static int igbvf_set_wol(struct net_device *netdev,
 336                          struct ethtool_wolinfo *wol)
 337 {
 338         return -EOPNOTSUPP;
 339 }
 340
 341 static int igbvf_get_coalesce(struct net_device *netdev,
 342                               struct ethtool_coalesce *ec)
 343 {
 344         struct igbvf_adapter *adapter = netdev_priv(netdev);
 345
 346         if (adapter->requested_itr <= 3)
 347                 ec->rx_coalesce_usecs = adapter->requested_itr;
 348         else
 349                 ec->rx_coalesce_usecs = adapter->current_itr >> 2;
 350
 351         return 0;
 352 }
 353
 354 static int igbvf_set_coalesce(struct net_device *netdev,
 355                               struct ethtool_coalesce *ec)
 356 {
 357         struct igbvf_adapter *adapter = netdev_priv(netdev);
 358         struct e1000_hw *hw = &adapter->hw;
 359
 360         if ((ec->rx_coalesce_usecs >= IGBVF_MIN_ITR_USECS) &&
 361             (ec->rx_coalesce_usecs <= IGBVF_MAX_ITR_USECS)) {
 362                 adapter->current_itr = ec->rx_coalesce_usecs << 2;
 363                 adapter->requested_itr = 1000000000 /
 364                                         (adapter->current_itr * 256);
 365         } else if ((ec->rx_coalesce_usecs == 3) ||
 366                    (ec->rx_coalesce_usecs == 2)) {
 367                 adapter->current_itr = IGBVF_START_ITR;
 368                 adapter->requested_itr = ec->rx_coalesce_usecs;
 369         } else if (ec->rx_coalesce_usecs == 0) {
 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
 383         writel(adapter->current_itr,
 384                hw->hw_addr + adapter->rx_ring->itr_register);
 385
 386         return 0;
 387 }
 388
 389 static int igbvf_nway_reset(struct net_device *netdev)
 390 {
 391         struct igbvf_adapter *adapter = netdev_priv(netdev);
 392
 393         if (netif_running(netdev))
 394                 igbvf_reinit_locked(adapter);
 395         return 0;
 396 }
 397
 398 static void igbvf_get_ethtool_stats(struct net_device *netdev,
 399                                     struct ethtool_stats *stats,
 400                                     u64 *data)
 401 {
 402         struct igbvf_adapter *adapter = netdev_priv(netdev);
 403         int i;
 404
 405         igbvf_update_stats(adapter);
 406         for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
 407                 char *p = (char *)adapter +
 408                           igbvf_gstrings_stats[i].stat_offset;
 409                 char *b = (char *)adapter +
 410                           igbvf_gstrings_stats[i].base_stat_offset;
 411                 data[i] = ((igbvf_gstrings_stats[i].sizeof_stat ==
 412                             sizeof(u64)) ? (*(u64 *)p - *(u64 *)b) :
 413                             (*(u32 *)p - *(u32 *)b));
 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_drvinfo            = igbvf_get_drvinfo,
 451         .get_regs_len           = igbvf_get_regs_len,
 452         .get_regs               = igbvf_get_regs,
 453         .get_wol                = igbvf_get_wol,
 454         .set_wol                = igbvf_set_wol,
 455         .get_msglevel           = igbvf_get_msglevel,
 456         .set_msglevel           = igbvf_set_msglevel,
 457         .nway_reset             = igbvf_nway_reset,
 458         .get_link               = ethtool_op_get_link,
 459         .get_eeprom_len         = igbvf_get_eeprom_len,
 460         .get_eeprom             = igbvf_get_eeprom,
 461         .set_eeprom             = igbvf_set_eeprom,
 462         .get_ringparam          = igbvf_get_ringparam,
 463         .set_ringparam          = igbvf_set_ringparam,
 464         .get_pauseparam         = igbvf_get_pauseparam,
 465         .set_pauseparam         = igbvf_set_pauseparam,
 466         .self_test              = igbvf_diag_test,
 467         .get_sset_count         = igbvf_get_sset_count,
 468         .get_strings            = igbvf_get_strings,
 469         .get_ethtool_stats      = igbvf_get_ethtool_stats,
 470         .get_coalesce           = igbvf_get_coalesce,
 471         .set_coalesce           = igbvf_set_coalesce,
 472         .get_link_ksettings     = igbvf_get_link_ksettings,
 473         .set_link_ksettings     = igbvf_set_link_ksettings,
 474 };
 475
 476 void igbvf_set_ethtool_ops(struct net_device *netdev)
 477 {
 478         netdev->ethtool_ops = &igbvf_ethtool_ops;
 479 }