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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2009 - 2018 Intel Corporation. */
   3
   4 /* ethtool support for igbvf */
   5
   6 #include <linux/netdevice.h>
   7 #include <linux/ethtool.h>
   8 #include <linux/pci.h>
   9 #include <linux/vmalloc.h>
  10 #include <linux/delay.h>
  11
  12 #include "igbvf.h"
  13 #include <linux/if_vlan.h>
  14
  15 struct igbvf_stats {
  16         char stat_string[ETH_GSTRING_LEN];
  17         int sizeof_stat;
  18         int stat_offset;
  19         int base_stat_offset;
  20 };
  21
  22 #define IGBVF_STAT(current, base) \
  23                 sizeof(((struct igbvf_adapter *)0)->current), \
  24                 offsetof(struct igbvf_adapter, current), \
  25                 offsetof(struct igbvf_adapter, base)
  26
  27 static const struct igbvf_stats igbvf_gstrings_stats[] = {
  28         { "rx_packets", IGBVF_STAT(stats.gprc, stats.base_gprc) },
  29         { "tx_packets", IGBVF_STAT(stats.gptc, stats.base_gptc) },
  30         { "rx_bytes", IGBVF_STAT(stats.gorc, stats.base_gorc) },
  31         { "tx_bytes", IGBVF_STAT(stats.gotc, stats.base_gotc) },
  32         { "multicast", IGBVF_STAT(stats.mprc, stats.base_mprc) },
  33         { "lbrx_bytes", IGBVF_STAT(stats.gorlbc, stats.base_gorlbc) },
  34         { "lbrx_packets", IGBVF_STAT(stats.gprlbc, stats.base_gprlbc) },
  35         { "tx_restart_queue", IGBVF_STAT(restart_queue, zero_base) },
  36         { "rx_long_byte_count", IGBVF_STAT(stats.gorc, stats.base_gorc) },
  37         { "rx_csum_offload_good", IGBVF_STAT(hw_csum_good, zero_base) },
  38         { "rx_csum_offload_errors", IGBVF_STAT(hw_csum_err, zero_base) },
  39         { "rx_header_split", IGBVF_STAT(rx_hdr_split, zero_base) },
  40         { "alloc_rx_buff_failed", IGBVF_STAT(alloc_rx_buff_failed, zero_base) },
  41 };
  42
  43 #define IGBVF_GLOBAL_STATS_LEN ARRAY_SIZE(igbvf_gstrings_stats)
  44
  45 static const char igbvf_gstrings_test[][ETH_GSTRING_LEN] = {
  46         "Link test   (on/offline)"
  47 };
  48
  49 #define IGBVF_TEST_LEN ARRAY_SIZE(igbvf_gstrings_test)
  50
  51 static int igbvf_get_link_ksettings(struct net_device *netdev,
  52                                     struct ethtool_link_ksettings *cmd)
  53 {
  54         struct igbvf_adapter *adapter = netdev_priv(netdev);
  55         struct e1000_hw *hw = &adapter->hw;
  56         u32 status;
  57
  58         ethtool_link_ksettings_zero_link_mode(cmd, supported);
  59         ethtool_link_ksettings_add_link_mode(cmd, supported, 1000baseT_Full);
  60         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
  61         ethtool_link_ksettings_add_link_mode(cmd, advertising, 1000baseT_Full);
  62
  63         cmd->base.port = -1;
  64
  65         status = er32(STATUS);
  66         if (status & E1000_STATUS_LU) {
  67                 if (status & E1000_STATUS_SPEED_1000)
  68                         cmd->base.speed = SPEED_1000;
  69                 else if (status & E1000_STATUS_SPEED_100)
  70                         cmd->base.speed = SPEED_100;
  71                 else
  72                         cmd->base.speed = SPEED_10;
  73
  74                 if (status & E1000_STATUS_FD)
  75                         cmd->base.duplex = DUPLEX_FULL;
  76                 else
  77                         cmd->base.duplex = DUPLEX_HALF;
  78         } else {
  79                 cmd->base.speed = SPEED_UNKNOWN;
  80                 cmd->base.duplex = DUPLEX_UNKNOWN;
  81         }
  82
  83         cmd->base.autoneg = AUTONEG_DISABLE;
  84
  85         return 0;
  86 }
  87
  88 static int igbvf_set_link_ksettings(struct net_device *netdev,
  89                                     const struct ethtool_link_ksettings *cmd)
  90 {
  91         return -EOPNOTSUPP;
  92 }
  93
  94 static void igbvf_get_pauseparam(struct net_device *netdev,
  95                                  struct ethtool_pauseparam *pause)
  96 {
  97 }
  98
  99 static int igbvf_set_pauseparam(struct net_device *netdev,
 100                                 struct ethtool_pauseparam *pause)
 101 {
 102         return -EOPNOTSUPP;
 103 }
 104
 105 static u32 igbvf_get_msglevel(struct net_device *netdev)
 106 {
 107         struct igbvf_adapter *adapter = netdev_priv(netdev);
 108
 109         return adapter->msg_enable;
 110 }
 111
 112 static void igbvf_set_msglevel(struct net_device *netdev, u32 data)
 113 {
 114         struct igbvf_adapter *adapter = netdev_priv(netdev);
 115
 116         adapter->msg_enable = data;
 117 }
 118
 119 static int igbvf_get_regs_len(struct net_device *netdev)
 120 {
 121 #define IGBVF_REGS_LEN 8
 122         return IGBVF_REGS_LEN * sizeof(u32);
 123 }
 124
 125 static void igbvf_get_regs(struct net_device *netdev,
 126                            struct ethtool_regs *regs, void *p)
 127 {
 128         struct igbvf_adapter *adapter = netdev_priv(netdev);
 129         struct e1000_hw *hw = &adapter->hw;
 130         u32 *regs_buff = p;
 131
 132         memset(p, 0, IGBVF_REGS_LEN * sizeof(u32));
 133
 134         regs->version = (1u << 24) |
 135                         (adapter->pdev->revision << 16) |
 136                         adapter->pdev->device;
 137
 138         regs_buff[0] = er32(CTRL);
 139         regs_buff[1] = er32(STATUS);
 140
 141         regs_buff[2] = er32(RDLEN(0));
 142         regs_buff[3] = er32(RDH(0));
 143         regs_buff[4] = er32(RDT(0));
 144
 145         regs_buff[5] = er32(TDLEN(0));
 146         regs_buff[6] = er32(TDH(0));
 147         regs_buff[7] = er32(TDT(0));
 148 }
 149
 150 static int igbvf_get_eeprom_len(struct net_device *netdev)
 151 {
 152         return 0;
 153 }
 154
 155 static int igbvf_get_eeprom(struct net_device *netdev,
 156                             struct ethtool_eeprom *eeprom, u8 *bytes)
 157 {
 158         return -EOPNOTSUPP;
 159 }
 160
 161 static int igbvf_set_eeprom(struct net_device *netdev,
 162                             struct ethtool_eeprom *eeprom, u8 *bytes)
 163 {
 164         return -EOPNOTSUPP;
 165 }
 166
 167 static void igbvf_get_drvinfo(struct net_device *netdev,
 168                               struct ethtool_drvinfo *drvinfo)
 169 {
 170         struct igbvf_adapter *adapter = netdev_priv(netdev);
 171
 172         strscpy(drvinfo->driver,  igbvf_driver_name, sizeof(drvinfo->driver));
 173         strscpy(drvinfo->bus_info, pci_name(adapter->pdev),
 174                 sizeof(drvinfo->bus_info));
 175 }
 176
 177 static void igbvf_get_ringparam(struct net_device *netdev,
 178                                 struct ethtool_ringparam *ring,
 179                                 struct kernel_ethtool_ringparam *kernel_ring,
 180                                 struct netlink_ext_ack *extack)
 181 {
 182         struct igbvf_adapter *adapter = netdev_priv(netdev);
 183         struct igbvf_ring *tx_ring = adapter->tx_ring;
 184         struct igbvf_ring *rx_ring = adapter->rx_ring;
 185
 186         ring->rx_max_pending = IGBVF_MAX_RXD;
 187         ring->tx_max_pending = IGBVF_MAX_TXD;
 188         ring->rx_pending = rx_ring->count;
 189         ring->tx_pending = tx_ring->count;
 190 }
 191
 192 static int igbvf_set_ringparam(struct net_device *netdev,
 193                                struct ethtool_ringparam *ring,
 194                                struct kernel_ethtool_ringparam *kernel_ring,
 195                                struct netlink_ext_ack *extack)
 196 {
 197         struct igbvf_adapter *adapter = netdev_priv(netdev);
 198         struct igbvf_ring *temp_ring;
 199         int err = 0;
 200         u32 new_rx_count, new_tx_count;
 201
 202         if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
 203                 return -EINVAL;
 204
 205         new_rx_count = max_t(u32, ring->rx_pending, IGBVF_MIN_RXD);
 206         new_rx_count = min_t(u32, new_rx_count, IGBVF_MAX_RXD);
 207         new_rx_count = ALIGN(new_rx_count, REQ_RX_DESCRIPTOR_MULTIPLE);
 208
 209         new_tx_count = max_t(u32, ring->tx_pending, IGBVF_MIN_TXD);
 210         new_tx_count = min_t(u32, new_tx_count, IGBVF_MAX_TXD);
 211         new_tx_count = ALIGN(new_tx_count, REQ_TX_DESCRIPTOR_MULTIPLE);
 212
 213         if ((new_tx_count == adapter->tx_ring->count) &&
 214             (new_rx_count == adapter->rx_ring->count)) {
 215                 /* nothing to do */
 216                 return 0;
 217         }
 218
 219         while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
 220                 usleep_range(1000, 2000);
 221
 222         if (!netif_running(adapter->netdev)) {
 223                 adapter->tx_ring->count = new_tx_count;
 224                 adapter->rx_ring->count = new_rx_count;
 225                 goto clear_reset;
 226         }
 227
 228         temp_ring = vmalloc(sizeof(struct igbvf_ring));
 229         if (!temp_ring) {
 230                 err = -ENOMEM;
 231                 goto clear_reset;
 232         }
 233
 234         igbvf_down(adapter);
 235
 236         /* We can't just free everything and then setup again,
 237          * because the ISRs in MSI-X mode get passed pointers
 238          * to the Tx and Rx ring structs.
 239          */
 240         if (new_tx_count != adapter->tx_ring->count) {
 241                 memcpy(temp_ring, adapter->tx_ring, sizeof(struct igbvf_ring));
 242
 243                 temp_ring->count = new_tx_count;
 244                 err = igbvf_setup_tx_resources(adapter, temp_ring);
 245                 if (err)
 246                         goto err_setup;
 247
 248                 igbvf_free_tx_resources(adapter->tx_ring);
 249
 250                 memcpy(adapter->tx_ring, temp_ring, sizeof(struct igbvf_ring));
 251         }
 252
 253         if (new_rx_count != adapter->rx_ring->count) {
 254                 memcpy(temp_ring, adapter->rx_ring, sizeof(struct igbvf_ring));
 255
 256                 temp_ring->count = new_rx_count;
 257                 err = igbvf_setup_rx_resources(adapter, temp_ring);
 258                 if (err)
 259                         goto err_setup;
 260
 261                 igbvf_free_rx_resources(adapter->rx_ring);
 262
 263                 memcpy(adapter->rx_ring, temp_ring, sizeof(struct igbvf_ring));
 264         }
 265 err_setup:
 266         igbvf_up(adapter);
 267         vfree(temp_ring);
 268 clear_reset:
 269         clear_bit(__IGBVF_RESETTING, &adapter->state);
 270         return err;
 271 }
 272
 273 static int igbvf_link_test(struct igbvf_adapter *adapter, u64 *data)
 274 {
 275         struct e1000_hw *hw = &adapter->hw;
 276         *data = 0;
 277
 278         spin_lock_bh(&hw->mbx_lock);
 279
 280         hw->mac.ops.check_for_link(hw);
 281
 282         spin_unlock_bh(&hw->mbx_lock);
 283
 284         if (!(er32(STATUS) & E1000_STATUS_LU))
 285                 *data = 1;
 286
 287         return *data;
 288 }
 289
 290 static void igbvf_diag_test(struct net_device *netdev,
 291                             struct ethtool_test *eth_test, u64 *data)
 292 {
 293         struct igbvf_adapter *adapter = netdev_priv(netdev);
 294
 295         set_bit(__IGBVF_TESTING, &adapter->state);
 296
 297         /* Link test performed before hardware reset so autoneg doesn't
 298          * interfere with test result
 299          */
 300         if (igbvf_link_test(adapter, &data[0]))
 301                 eth_test->flags |= ETH_TEST_FL_FAILED;
 302
 303         clear_bit(__IGBVF_TESTING, &adapter->state);
 304         msleep_interruptible(4 * 1000);
 305 }
 306
 307 static void igbvf_get_wol(struct net_device *netdev,
 308                           struct ethtool_wolinfo *wol)
 309 {
 310         wol->supported = 0;
 311         wol->wolopts = 0;
 312 }
 313
 314 static int igbvf_set_wol(struct net_device *netdev,
 315                          struct ethtool_wolinfo *wol)
 316 {
 317         return -EOPNOTSUPP;
 318 }
 319
 320 static int igbvf_get_coalesce(struct net_device *netdev,
 321                               struct ethtool_coalesce *ec,
 322                               struct kernel_ethtool_coalesce *kernel_coal,
 323                               struct netlink_ext_ack *extack)
 324 {
 325         struct igbvf_adapter *adapter = netdev_priv(netdev);
 326
 327         if (adapter->requested_itr <= 3)
 328                 ec->rx_coalesce_usecs = adapter->requested_itr;
 329         else
 330                 ec->rx_coalesce_usecs = adapter->current_itr >> 2;
 331
 332         return 0;
 333 }
 334
 335 static int igbvf_set_coalesce(struct net_device *netdev,
 336                               struct ethtool_coalesce *ec,
 337                               struct kernel_ethtool_coalesce *kernel_coal,
 338                               struct netlink_ext_ack *extack)
 339 {
 340         struct igbvf_adapter *adapter = netdev_priv(netdev);
 341         struct e1000_hw *hw = &adapter->hw;
 342
 343         if ((ec->rx_coalesce_usecs >= IGBVF_MIN_ITR_USECS) &&
 344             (ec->rx_coalesce_usecs <= IGBVF_MAX_ITR_USECS)) {
 345                 adapter->current_itr = ec->rx_coalesce_usecs << 2;
 346                 adapter->requested_itr = 1000000000 /
 347                                         (adapter->current_itr * 256);
 348         } else if ((ec->rx_coalesce_usecs == 3) ||
 349                    (ec->rx_coalesce_usecs == 2)) {
 350                 adapter->current_itr = IGBVF_START_ITR;
 351                 adapter->requested_itr = ec->rx_coalesce_usecs;
 352         } else if (ec->rx_coalesce_usecs == 0) {
 353                 /* The user's desire is to turn off interrupt throttling
 354                  * altogether, but due to HW limitations, we can't do that.
 355                  * Instead we set a very small value in EITR, which would
 356                  * allow ~967k interrupts per second, but allow the adapter's
 357                  * internal clocking to still function properly.
 358                  */
 359                 adapter->current_itr = 4;
 360                 adapter->requested_itr = 1000000000 /
 361                                         (adapter->current_itr * 256);
 362         } else {
 363                 return -EINVAL;
 364         }
 365
 366         writel(adapter->current_itr,
 367                hw->hw_addr + adapter->rx_ring->itr_register);
 368
 369         return 0;
 370 }
 371
 372 static int igbvf_nway_reset(struct net_device *netdev)
 373 {
 374         struct igbvf_adapter *adapter = netdev_priv(netdev);
 375
 376         if (netif_running(netdev))
 377                 igbvf_reinit_locked(adapter);
 378         return 0;
 379 }
 380
 381 static void igbvf_get_ethtool_stats(struct net_device *netdev,
 382                                     struct ethtool_stats *stats,
 383                                     u64 *data)
 384 {
 385         struct igbvf_adapter *adapter = netdev_priv(netdev);
 386         int i;
 387
 388         igbvf_update_stats(adapter);
 389         for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
 390                 char *p = (char *)adapter +
 391                           igbvf_gstrings_stats[i].stat_offset;
 392                 char *b = (char *)adapter +
 393                           igbvf_gstrings_stats[i].base_stat_offset;
 394                 data[i] = ((igbvf_gstrings_stats[i].sizeof_stat ==
 395                             sizeof(u64)) ? (*(u64 *)p - *(u64 *)b) :
 396                             (*(u32 *)p - *(u32 *)b));
 397         }
 398 }
 399
 400 static int igbvf_get_sset_count(struct net_device *dev, int stringset)
 401 {
 402         switch (stringset) {
 403         case ETH_SS_TEST:
 404                 return IGBVF_TEST_LEN;
 405         case ETH_SS_STATS:
 406                 return IGBVF_GLOBAL_STATS_LEN;
 407         default:
 408                 return -EINVAL;
 409         }
 410 }
 411
 412 static void igbvf_get_strings(struct net_device *netdev, u32 stringset,
 413                               u8 *data)
 414 {
 415         u8 *p = data;
 416         int i;
 417
 418         switch (stringset) {
 419         case ETH_SS_TEST:
 420                 memcpy(data, *igbvf_gstrings_test, sizeof(igbvf_gstrings_test));
 421                 break;
 422         case ETH_SS_STATS:
 423                 for (i = 0; i < IGBVF_GLOBAL_STATS_LEN; i++) {
 424                         memcpy(p, igbvf_gstrings_stats[i].stat_string,
 425                                ETH_GSTRING_LEN);
 426                         p += ETH_GSTRING_LEN;
 427                 }
 428                 break;
 429         }
 430 }
 431
 432 static const struct ethtool_ops igbvf_ethtool_ops = {
 433         .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
 434         .get_drvinfo            = igbvf_get_drvinfo,
 435         .get_regs_len           = igbvf_get_regs_len,
 436         .get_regs               = igbvf_get_regs,
 437         .get_wol                = igbvf_get_wol,
 438         .set_wol                = igbvf_set_wol,
 439         .get_msglevel           = igbvf_get_msglevel,
 440         .set_msglevel           = igbvf_set_msglevel,
 441         .nway_reset             = igbvf_nway_reset,
 442         .get_link               = ethtool_op_get_link,
 443         .get_eeprom_len         = igbvf_get_eeprom_len,
 444         .get_eeprom             = igbvf_get_eeprom,
 445         .set_eeprom             = igbvf_set_eeprom,
 446         .get_ringparam          = igbvf_get_ringparam,
 447         .set_ringparam          = igbvf_set_ringparam,
 448         .get_pauseparam         = igbvf_get_pauseparam,
 449         .set_pauseparam         = igbvf_set_pauseparam,
 450         .self_test              = igbvf_diag_test,
 451         .get_sset_count         = igbvf_get_sset_count,
 452         .get_strings            = igbvf_get_strings,
 453         .get_ethtool_stats      = igbvf_get_ethtool_stats,
 454         .get_coalesce           = igbvf_get_coalesce,
 455         .set_coalesce           = igbvf_set_coalesce,
 456         .get_link_ksettings     = igbvf_get_link_ksettings,
 457         .set_link_ksettings     = igbvf_set_link_ksettings,
 458 };
 459
 460 void igbvf_set_ethtool_ops(struct net_device *netdev)
 461 {
 462         netdev->ethtool_ops = &igbvf_ethtool_ops;
 463 }