SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/sfc/ethtool.c

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2005-2006 Fen Systems Ltd.
   4  * Copyright 2006-2008 Solarflare Communications Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation, incorporated herein by reference.
   9  */
  10
  11 #include <linux/netdevice.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/mdio.h>
  14 #include <linux/rtnetlink.h>
  15 #include "net_driver.h"
  16 #include "workarounds.h"
  17 #include "selftest.h"
  18 #include "efx.h"
  19 #include "falcon.h"
  20 #include "spi.h"
  21 #include "mdio_10g.h"
  22
  23 struct ethtool_string {
  24         char name[ETH_GSTRING_LEN];
  25 };
  26
  27 struct efx_ethtool_stat {
  28         const char *name;
  29         enum {
  30                 EFX_ETHTOOL_STAT_SOURCE_mac_stats,
  31                 EFX_ETHTOOL_STAT_SOURCE_nic,
  32                 EFX_ETHTOOL_STAT_SOURCE_channel
  33         } source;
  34         unsigned offset;
  35         u64(*get_stat) (void *field); /* Reader function */
  36 };
  37
  38 /* Initialiser for a struct #efx_ethtool_stat with type-checking */
  39 #define EFX_ETHTOOL_STAT(stat_name, source_name, field, field_type, \
  40                                 get_stat_function) {                    \
  41         .name = #stat_name,                                             \
  42         .source = EFX_ETHTOOL_STAT_SOURCE_##source_name,                \
  43         .offset = ((((field_type *) 0) ==                               \
  44                       &((struct efx_##source_name *)0)->field) ?        \
  45                     offsetof(struct efx_##source_name, field) :         \
  46                     offsetof(struct efx_##source_name, field)),         \
  47         .get_stat = get_stat_function,                                  \
  48 }
  49
  50 static u64 efx_get_uint_stat(void *field)
  51 {
  52         return *(unsigned int *)field;
  53 }
  54
  55 static u64 efx_get_ulong_stat(void *field)
  56 {
  57         return *(unsigned long *)field;
  58 }
  59
  60 static u64 efx_get_u64_stat(void *field)
  61 {
  62         return *(u64 *) field;
  63 }
  64
  65 static u64 efx_get_atomic_stat(void *field)
  66 {
  67         return atomic_read((atomic_t *) field);
  68 }
  69
  70 #define EFX_ETHTOOL_ULONG_MAC_STAT(field)                       \
  71         EFX_ETHTOOL_STAT(field, mac_stats, field,               \
  72                           unsigned long, efx_get_ulong_stat)
  73
  74 #define EFX_ETHTOOL_U64_MAC_STAT(field)                         \
  75         EFX_ETHTOOL_STAT(field, mac_stats, field,               \
  76                           u64, efx_get_u64_stat)
  77
  78 #define EFX_ETHTOOL_UINT_NIC_STAT(name)                         \
  79         EFX_ETHTOOL_STAT(name, nic, n_##name,                   \
  80                          unsigned int, efx_get_uint_stat)
  81
  82 #define EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(field)                \
  83         EFX_ETHTOOL_STAT(field, nic, field,                     \
  84                          atomic_t, efx_get_atomic_stat)
  85
  86 #define EFX_ETHTOOL_UINT_CHANNEL_STAT(field)                    \
  87         EFX_ETHTOOL_STAT(field, channel, n_##field,             \
  88                          unsigned int, efx_get_uint_stat)
  89
  90 static struct efx_ethtool_stat efx_ethtool_stats[] = {
  91         EFX_ETHTOOL_U64_MAC_STAT(tx_bytes),
  92         EFX_ETHTOOL_U64_MAC_STAT(tx_good_bytes),
  93         EFX_ETHTOOL_U64_MAC_STAT(tx_bad_bytes),
  94         EFX_ETHTOOL_ULONG_MAC_STAT(tx_packets),
  95         EFX_ETHTOOL_ULONG_MAC_STAT(tx_bad),
  96         EFX_ETHTOOL_ULONG_MAC_STAT(tx_pause),
  97         EFX_ETHTOOL_ULONG_MAC_STAT(tx_control),
  98         EFX_ETHTOOL_ULONG_MAC_STAT(tx_unicast),
  99         EFX_ETHTOOL_ULONG_MAC_STAT(tx_multicast),
 100         EFX_ETHTOOL_ULONG_MAC_STAT(tx_broadcast),
 101         EFX_ETHTOOL_ULONG_MAC_STAT(tx_lt64),
 102         EFX_ETHTOOL_ULONG_MAC_STAT(tx_64),
 103         EFX_ETHTOOL_ULONG_MAC_STAT(tx_65_to_127),
 104         EFX_ETHTOOL_ULONG_MAC_STAT(tx_128_to_255),
 105         EFX_ETHTOOL_ULONG_MAC_STAT(tx_256_to_511),
 106         EFX_ETHTOOL_ULONG_MAC_STAT(tx_512_to_1023),
 107         EFX_ETHTOOL_ULONG_MAC_STAT(tx_1024_to_15xx),
 108         EFX_ETHTOOL_ULONG_MAC_STAT(tx_15xx_to_jumbo),
 109         EFX_ETHTOOL_ULONG_MAC_STAT(tx_gtjumbo),
 110         EFX_ETHTOOL_ULONG_MAC_STAT(tx_collision),
 111         EFX_ETHTOOL_ULONG_MAC_STAT(tx_single_collision),
 112         EFX_ETHTOOL_ULONG_MAC_STAT(tx_multiple_collision),
 113         EFX_ETHTOOL_ULONG_MAC_STAT(tx_excessive_collision),
 114         EFX_ETHTOOL_ULONG_MAC_STAT(tx_deferred),
 115         EFX_ETHTOOL_ULONG_MAC_STAT(tx_late_collision),
 116         EFX_ETHTOOL_ULONG_MAC_STAT(tx_excessive_deferred),
 117         EFX_ETHTOOL_ULONG_MAC_STAT(tx_non_tcpudp),
 118         EFX_ETHTOOL_ULONG_MAC_STAT(tx_mac_src_error),
 119         EFX_ETHTOOL_ULONG_MAC_STAT(tx_ip_src_error),
 120         EFX_ETHTOOL_U64_MAC_STAT(rx_bytes),
 121         EFX_ETHTOOL_U64_MAC_STAT(rx_good_bytes),
 122         EFX_ETHTOOL_U64_MAC_STAT(rx_bad_bytes),
 123         EFX_ETHTOOL_ULONG_MAC_STAT(rx_packets),
 124         EFX_ETHTOOL_ULONG_MAC_STAT(rx_good),
 125         EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad),
 126         EFX_ETHTOOL_ULONG_MAC_STAT(rx_pause),
 127         EFX_ETHTOOL_ULONG_MAC_STAT(rx_control),
 128         EFX_ETHTOOL_ULONG_MAC_STAT(rx_unicast),
 129         EFX_ETHTOOL_ULONG_MAC_STAT(rx_multicast),
 130         EFX_ETHTOOL_ULONG_MAC_STAT(rx_broadcast),
 131         EFX_ETHTOOL_ULONG_MAC_STAT(rx_lt64),
 132         EFX_ETHTOOL_ULONG_MAC_STAT(rx_64),
 133         EFX_ETHTOOL_ULONG_MAC_STAT(rx_65_to_127),
 134         EFX_ETHTOOL_ULONG_MAC_STAT(rx_128_to_255),
 135         EFX_ETHTOOL_ULONG_MAC_STAT(rx_256_to_511),
 136         EFX_ETHTOOL_ULONG_MAC_STAT(rx_512_to_1023),
 137         EFX_ETHTOOL_ULONG_MAC_STAT(rx_1024_to_15xx),
 138         EFX_ETHTOOL_ULONG_MAC_STAT(rx_15xx_to_jumbo),
 139         EFX_ETHTOOL_ULONG_MAC_STAT(rx_gtjumbo),
 140         EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad_lt64),
 141         EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad_64_to_15xx),
 142         EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad_15xx_to_jumbo),
 143         EFX_ETHTOOL_ULONG_MAC_STAT(rx_bad_gtjumbo),
 144         EFX_ETHTOOL_ULONG_MAC_STAT(rx_overflow),
 145         EFX_ETHTOOL_ULONG_MAC_STAT(rx_missed),
 146         EFX_ETHTOOL_ULONG_MAC_STAT(rx_false_carrier),
 147         EFX_ETHTOOL_ULONG_MAC_STAT(rx_symbol_error),
 148         EFX_ETHTOOL_ULONG_MAC_STAT(rx_align_error),
 149         EFX_ETHTOOL_ULONG_MAC_STAT(rx_length_error),
 150         EFX_ETHTOOL_ULONG_MAC_STAT(rx_internal_error),
 151         EFX_ETHTOOL_UINT_NIC_STAT(rx_nodesc_drop_cnt),
 152         EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(rx_reset),
 153         EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tobe_disc),
 154         EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_ip_hdr_chksum_err),
 155         EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tcp_udp_chksum_err),
 156         EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_frm_trunc),
 157 };
 158
 159 /* Number of ethtool statistics */
 160 #define EFX_ETHTOOL_NUM_STATS ARRAY_SIZE(efx_ethtool_stats)
 161
 162 #define EFX_ETHTOOL_EEPROM_MAGIC 0xEFAB
 163
 164 /**************************************************************************
 165  *
 166  * Ethtool operations
 167  *
 168  **************************************************************************
 169  */
 170
 171 /* Identify device by flashing LEDs */
 172 static int efx_ethtool_phys_id(struct net_device *net_dev, u32 count)
 173 {
 174         struct efx_nic *efx = netdev_priv(net_dev);
 175
 176         do {
 177                 falcon_board(efx)->type->set_id_led(efx, EFX_LED_ON);
 178                 schedule_timeout_interruptible(HZ / 2);
 179
 180                 falcon_board(efx)->type->set_id_led(efx, EFX_LED_OFF);
 181                 schedule_timeout_interruptible(HZ / 2);
 182         } while (!signal_pending(current) && --count != 0);
 183
 184         falcon_board(efx)->type->set_id_led(efx, EFX_LED_DEFAULT);
 185         return 0;
 186 }
 187
 188 /* This must be called with rtnl_lock held. */
 189 int efx_ethtool_get_settings(struct net_device *net_dev,
 190                              struct ethtool_cmd *ecmd)
 191 {
 192         struct efx_nic *efx = netdev_priv(net_dev);
 193
 194         mutex_lock(&efx->mac_lock);
 195         efx->phy_op->get_settings(efx, ecmd);
 196         mutex_unlock(&efx->mac_lock);
 197
 198         /* Falcon GMAC does not support 1000Mbps HD */
 199         ecmd->supported &= ~SUPPORTED_1000baseT_Half;
 200
 201         return 0;
 202 }
 203
 204 /* This must be called with rtnl_lock held. */
 205 int efx_ethtool_set_settings(struct net_device *net_dev,
 206                              struct ethtool_cmd *ecmd)
 207 {
 208         struct efx_nic *efx = netdev_priv(net_dev);
 209         int rc;
 210
 211         /* Falcon GMAC does not support 1000Mbps HD */
 212         if (ecmd->speed == SPEED_1000 && ecmd->duplex != DUPLEX_FULL) {
 213                 EFX_LOG(efx, "rejecting unsupported 1000Mbps HD"
 214                         " setting\n");
 215                 return -EINVAL;
 216         }
 217
 218         mutex_lock(&efx->mac_lock);
 219         rc = efx->phy_op->set_settings(efx, ecmd);
 220         mutex_unlock(&efx->mac_lock);
 221         if (!rc)
 222                 efx_reconfigure_port(efx);
 223
 224         return rc;
 225 }
 226
 227 static void efx_ethtool_get_drvinfo(struct net_device *net_dev,
 228                                     struct ethtool_drvinfo *info)
 229 {
 230         struct efx_nic *efx = netdev_priv(net_dev);
 231
 232         strlcpy(info->driver, EFX_DRIVER_NAME, sizeof(info->driver));
 233         strlcpy(info->version, EFX_DRIVER_VERSION, sizeof(info->version));
 234         strlcpy(info->bus_info, pci_name(efx->pci_dev), sizeof(info->bus_info));
 235 }
 236
 237 /**
 238  * efx_fill_test - fill in an individual self-test entry
 239  * @test_index:         Index of the test
 240  * @strings:            Ethtool strings, or %NULL
 241  * @data:               Ethtool test results, or %NULL
 242  * @test:               Pointer to test result (used only if data != %NULL)
 243  * @unit_format:        Unit name format (e.g. "chan\%d")
 244  * @unit_id:            Unit id (e.g. 0 for "chan0")
 245  * @test_format:        Test name format (e.g. "loopback.\%s.tx.sent")
 246  * @test_id:            Test id (e.g. "PHYXS" for "loopback.PHYXS.tx_sent")
 247  *
 248  * Fill in an individual self-test entry.
 249  */
 250 static void efx_fill_test(unsigned int test_index,
 251                           struct ethtool_string *strings, u64 *data,
 252                           int *test, const char *unit_format, int unit_id,
 253                           const char *test_format, const char *test_id)
 254 {
 255         struct ethtool_string unit_str, test_str;
 256
 257         /* Fill data value, if applicable */
 258         if (data)
 259                 data[test_index] = *test;
 260
 261         /* Fill string, if applicable */
 262         if (strings) {
 263                 if (strchr(unit_format, '%'))
 264                         snprintf(unit_str.name, sizeof(unit_str.name),
 265                                  unit_format, unit_id);
 266                 else
 267                         strcpy(unit_str.name, unit_format);
 268                 snprintf(test_str.name, sizeof(test_str.name),
 269                          test_format, test_id);
 270                 snprintf(strings[test_index].name,
 271                          sizeof(strings[test_index].name),
 272                          "%-6s %-24s", unit_str.name, test_str.name);
 273         }
 274 }
 275
 276 #define EFX_CHANNEL_NAME(_channel) "chan%d", _channel->channel
 277 #define EFX_TX_QUEUE_NAME(_tx_queue) "txq%d", _tx_queue->queue
 278 #define EFX_RX_QUEUE_NAME(_rx_queue) "rxq%d", _rx_queue->queue
 279 #define EFX_LOOPBACK_NAME(_mode, _counter)                      \
 280         "loopback.%s." _counter, STRING_TABLE_LOOKUP(_mode, efx_loopback_mode)
 281
 282 /**
 283  * efx_fill_loopback_test - fill in a block of loopback self-test entries
 284  * @efx:                Efx NIC
 285  * @lb_tests:           Efx loopback self-test results structure
 286  * @mode:               Loopback test mode
 287  * @test_index:         Starting index of the test
 288  * @strings:            Ethtool strings, or %NULL
 289  * @data:               Ethtool test results, or %NULL
 290  */
 291 static int efx_fill_loopback_test(struct efx_nic *efx,
 292                                   struct efx_loopback_self_tests *lb_tests,
 293                                   enum efx_loopback_mode mode,
 294                                   unsigned int test_index,
 295                                   struct ethtool_string *strings, u64 *data)
 296 {
 297         struct efx_tx_queue *tx_queue;
 298
 299         efx_for_each_tx_queue(tx_queue, efx) {
 300                 efx_fill_test(test_index++, strings, data,
 301                               &lb_tests->tx_sent[tx_queue->queue],
 302                               EFX_TX_QUEUE_NAME(tx_queue),
 303                               EFX_LOOPBACK_NAME(mode, "tx_sent"));
 304                 efx_fill_test(test_index++, strings, data,
 305                               &lb_tests->tx_done[tx_queue->queue],
 306                               EFX_TX_QUEUE_NAME(tx_queue),
 307                               EFX_LOOPBACK_NAME(mode, "tx_done"));
 308         }
 309         efx_fill_test(test_index++, strings, data,
 310                       &lb_tests->rx_good,
 311                       "rx", 0,
 312                       EFX_LOOPBACK_NAME(mode, "rx_good"));
 313         efx_fill_test(test_index++, strings, data,
 314                       &lb_tests->rx_bad,
 315                       "rx", 0,
 316                       EFX_LOOPBACK_NAME(mode, "rx_bad"));
 317
 318         return test_index;
 319 }
 320
 321 /**
 322  * efx_ethtool_fill_self_tests - get self-test details
 323  * @efx:                Efx NIC
 324  * @tests:              Efx self-test results structure, or %NULL
 325  * @strings:            Ethtool strings, or %NULL
 326  * @data:               Ethtool test results, or %NULL
 327  */
 328 static int efx_ethtool_fill_self_tests(struct efx_nic *efx,
 329                                        struct efx_self_tests *tests,
 330                                        struct ethtool_string *strings,
 331                                        u64 *data)
 332 {
 333         struct efx_channel *channel;
 334         unsigned int n = 0, i;
 335         enum efx_loopback_mode mode;
 336
 337         efx_fill_test(n++, strings, data, &tests->mdio,
 338                       "core", 0, "mdio", NULL);
 339         efx_fill_test(n++, strings, data, &tests->nvram,
 340                       "core", 0, "nvram", NULL);
 341         efx_fill_test(n++, strings, data, &tests->interrupt,
 342                       "core", 0, "interrupt", NULL);
 343
 344         /* Event queues */
 345         efx_for_each_channel(channel, efx) {
 346                 efx_fill_test(n++, strings, data,
 347                               &tests->eventq_dma[channel->channel],
 348                               EFX_CHANNEL_NAME(channel),
 349                               "eventq.dma", NULL);
 350                 efx_fill_test(n++, strings, data,
 351                               &tests->eventq_int[channel->channel],
 352                               EFX_CHANNEL_NAME(channel),
 353                               "eventq.int", NULL);
 354                 efx_fill_test(n++, strings, data,
 355                               &tests->eventq_poll[channel->channel],
 356                               EFX_CHANNEL_NAME(channel),
 357                               "eventq.poll", NULL);
 358         }
 359
 360         efx_fill_test(n++, strings, data, &tests->registers,
 361                       "core", 0, "registers", NULL);
 362
 363         for (i = 0; i < efx->phy_op->num_tests; i++)
 364                 efx_fill_test(n++, strings, data, &tests->phy[i],
 365                               "phy", 0, efx->phy_op->test_names[i], NULL);
 366
 367         /* Loopback tests */
 368         for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) {
 369                 if (!(efx->loopback_modes & (1 << mode)))
 370                         continue;
 371                 n = efx_fill_loopback_test(efx,
 372                                            &tests->loopback[mode], mode, n,
 373                                            strings, data);
 374         }
 375
 376         return n;
 377 }
 378
 379 static int efx_ethtool_get_sset_count(struct net_device *net_dev,
 380                                       int string_set)
 381 {
 382         switch (string_set) {
 383         case ETH_SS_STATS:
 384                 return EFX_ETHTOOL_NUM_STATS;
 385         case ETH_SS_TEST:
 386                 return efx_ethtool_fill_self_tests(netdev_priv(net_dev),
 387                                                    NULL, NULL, NULL);
 388         default:
 389                 return -EINVAL;
 390         }
 391 }
 392
 393 static void efx_ethtool_get_strings(struct net_device *net_dev,
 394                                     u32 string_set, u8 *strings)
 395 {
 396         struct efx_nic *efx = netdev_priv(net_dev);
 397         struct ethtool_string *ethtool_strings =
 398                 (struct ethtool_string *)strings;
 399         int i;
 400
 401         switch (string_set) {
 402         case ETH_SS_STATS:
 403                 for (i = 0; i < EFX_ETHTOOL_NUM_STATS; i++)
 404                         strncpy(ethtool_strings[i].name,
 405                                 efx_ethtool_stats[i].name,
 406                                 sizeof(ethtool_strings[i].name));
 407                 break;
 408         case ETH_SS_TEST:
 409                 efx_ethtool_fill_self_tests(efx, NULL,
 410                                             ethtool_strings, NULL);
 411                 break;
 412         default:
 413                 /* No other string sets */
 414                 break;
 415         }
 416 }
 417
 418 static void efx_ethtool_get_stats(struct net_device *net_dev,
 419                                   struct ethtool_stats *stats,
 420                                   u64 *data)
 421 {
 422         struct efx_nic *efx = netdev_priv(net_dev);
 423         struct efx_mac_stats *mac_stats = &efx->mac_stats;
 424         struct efx_ethtool_stat *stat;
 425         struct efx_channel *channel;
 426         int i;
 427
 428         EFX_BUG_ON_PARANOID(stats->n_stats != EFX_ETHTOOL_NUM_STATS);
 429
 430         /* Update MAC and NIC statistics */
 431         dev_get_stats(net_dev);
 432
 433         /* Fill detailed statistics buffer */
 434         for (i = 0; i < EFX_ETHTOOL_NUM_STATS; i++) {
 435                 stat = &efx_ethtool_stats[i];
 436                 switch (stat->source) {
 437                 case EFX_ETHTOOL_STAT_SOURCE_mac_stats:
 438                         data[i] = stat->get_stat((void *)mac_stats +
 439                                                  stat->offset);
 440                         break;
 441                 case EFX_ETHTOOL_STAT_SOURCE_nic:
 442                         data[i] = stat->get_stat((void *)efx + stat->offset);
 443                         break;
 444                 case EFX_ETHTOOL_STAT_SOURCE_channel:
 445                         data[i] = 0;
 446                         efx_for_each_channel(channel, efx)
 447                                 data[i] += stat->get_stat((void *)channel +
 448                                                           stat->offset);
 449                         break;
 450                 }
 451         }
 452 }
 453
 454 static int efx_ethtool_set_rx_csum(struct net_device *net_dev, u32 enable)
 455 {
 456         struct efx_nic *efx = netdev_priv(net_dev);
 457
 458         /* No way to stop the hardware doing the checks; we just
 459          * ignore the result.
 460          */
 461         efx->rx_checksum_enabled = !!enable;
 462
 463         return 0;
 464 }
 465
 466 static u32 efx_ethtool_get_rx_csum(struct net_device *net_dev)
 467 {
 468         struct efx_nic *efx = netdev_priv(net_dev);
 469
 470         return efx->rx_checksum_enabled;
 471 }
 472
 473 static void efx_ethtool_self_test(struct net_device *net_dev,
 474                                   struct ethtool_test *test, u64 *data)
 475 {
 476         struct efx_nic *efx = netdev_priv(net_dev);
 477         struct efx_self_tests efx_tests;
 478         int already_up;
 479         int rc;
 480
 481         ASSERT_RTNL();
 482         if (efx->state != STATE_RUNNING) {
 483                 rc = -EIO;
 484                 goto fail1;
 485         }
 486
 487         /* We need rx buffers and interrupts. */
 488         already_up = (efx->net_dev->flags & IFF_UP);
 489         if (!already_up) {
 490                 rc = dev_open(efx->net_dev);
 491                 if (rc) {
 492                         EFX_ERR(efx, "failed opening device.\n");
 493                         goto fail2;
 494                 }
 495         }
 496
 497         memset(&efx_tests, 0, sizeof(efx_tests));
 498
 499         rc = efx_selftest(efx, &efx_tests, test->flags);
 500
 501         if (!already_up)
 502                 dev_close(efx->net_dev);
 503
 504         EFX_LOG(efx, "%s %sline self-tests\n",
 505                 rc == 0 ? "passed" : "failed",
 506                 (test->flags & ETH_TEST_FL_OFFLINE) ? "off" : "on");
 507
 508  fail2:
 509  fail1:
 510         /* Fill ethtool results structures */
 511         efx_ethtool_fill_self_tests(efx, &efx_tests, NULL, data);
 512         if (rc)
 513                 test->flags |= ETH_TEST_FL_FAILED;
 514 }
 515
 516 /* Restart autonegotiation */
 517 static int efx_ethtool_nway_reset(struct net_device *net_dev)
 518 {
 519         struct efx_nic *efx = netdev_priv(net_dev);
 520
 521         return mdio45_nway_restart(&efx->mdio);
 522 }
 523
 524 static u32 efx_ethtool_get_link(struct net_device *net_dev)
 525 {
 526         struct efx_nic *efx = netdev_priv(net_dev);
 527
 528         return efx->link_state.up;
 529 }
 530
 531 static int efx_ethtool_get_eeprom_len(struct net_device *net_dev)
 532 {
 533         struct efx_nic *efx = netdev_priv(net_dev);
 534         struct efx_spi_device *spi = efx->spi_eeprom;
 535
 536         if (!spi)
 537                 return 0;
 538         return min(spi->size, EFX_EEPROM_BOOTCONFIG_END) -
 539                 min(spi->size, EFX_EEPROM_BOOTCONFIG_START);
 540 }
 541
 542 static int efx_ethtool_get_eeprom(struct net_device *net_dev,
 543                                   struct ethtool_eeprom *eeprom, u8 *buf)
 544 {
 545         struct efx_nic *efx = netdev_priv(net_dev);
 546         struct efx_spi_device *spi = efx->spi_eeprom;
 547         size_t len;
 548         int rc;
 549
 550         rc = mutex_lock_interruptible(&efx->spi_lock);
 551         if (rc)
 552                 return rc;
 553         rc = falcon_spi_read(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,
 554                              eeprom->len, &len, buf);
 555         mutex_unlock(&efx->spi_lock);
 556
 557         eeprom->magic = EFX_ETHTOOL_EEPROM_MAGIC;
 558         eeprom->len = len;
 559         return rc;
 560 }
 561
 562 static int efx_ethtool_set_eeprom(struct net_device *net_dev,
 563                                   struct ethtool_eeprom *eeprom, u8 *buf)
 564 {
 565         struct efx_nic *efx = netdev_priv(net_dev);
 566         struct efx_spi_device *spi = efx->spi_eeprom;
 567         size_t len;
 568         int rc;
 569
 570         if (eeprom->magic != EFX_ETHTOOL_EEPROM_MAGIC)
 571                 return -EINVAL;
 572
 573         rc = mutex_lock_interruptible(&efx->spi_lock);
 574         if (rc)
 575                 return rc;
 576         rc = falcon_spi_write(spi, eeprom->offset + EFX_EEPROM_BOOTCONFIG_START,
 577                               eeprom->len, &len, buf);
 578         mutex_unlock(&efx->spi_lock);
 579
 580         eeprom->len = len;
 581         return rc;
 582 }
 583
 584 static int efx_ethtool_get_coalesce(struct net_device *net_dev,
 585                                     struct ethtool_coalesce *coalesce)
 586 {
 587         struct efx_nic *efx = netdev_priv(net_dev);
 588         struct efx_tx_queue *tx_queue;
 589         struct efx_channel *channel;
 590
 591         memset(coalesce, 0, sizeof(*coalesce));
 592
 593         /* Find lowest IRQ moderation across all used TX queues */
 594         coalesce->tx_coalesce_usecs_irq = ~((u32) 0);
 595         efx_for_each_tx_queue(tx_queue, efx) {
 596                 channel = tx_queue->channel;
 597                 if (channel->irq_moderation < coalesce->tx_coalesce_usecs_irq) {
 598                         if (channel->used_flags != EFX_USED_BY_RX_TX)
 599                                 coalesce->tx_coalesce_usecs_irq =
 600                                         channel->irq_moderation;
 601                         else
 602                                 coalesce->tx_coalesce_usecs_irq = 0;
 603                 }
 604         }
 605
 606         coalesce->use_adaptive_rx_coalesce = efx->irq_rx_adaptive;
 607         coalesce->rx_coalesce_usecs_irq = efx->irq_rx_moderation;
 608
 609         coalesce->tx_coalesce_usecs_irq *= FALCON_IRQ_MOD_RESOLUTION;
 610         coalesce->rx_coalesce_usecs_irq *= FALCON_IRQ_MOD_RESOLUTION;
 611
 612         return 0;
 613 }
 614
 615 /* Set coalescing parameters
 616  * The difficulties occur for shared channels
 617  */
 618 static int efx_ethtool_set_coalesce(struct net_device *net_dev,
 619                                     struct ethtool_coalesce *coalesce)
 620 {
 621         struct efx_nic *efx = netdev_priv(net_dev);
 622         struct efx_channel *channel;
 623         struct efx_tx_queue *tx_queue;
 624         unsigned tx_usecs, rx_usecs, adaptive;
 625
 626         if (coalesce->use_adaptive_tx_coalesce)
 627                 return -EOPNOTSUPP;
 628
 629         if (coalesce->rx_coalesce_usecs || coalesce->tx_coalesce_usecs) {
 630                 EFX_ERR(efx, "invalid coalescing setting. "
 631                         "Only rx/tx_coalesce_usecs_irq are supported\n");
 632                 return -EOPNOTSUPP;
 633         }
 634
 635         rx_usecs = coalesce->rx_coalesce_usecs_irq;
 636         tx_usecs = coalesce->tx_coalesce_usecs_irq;
 637         adaptive = coalesce->use_adaptive_rx_coalesce;
 638
 639         /* If the channel is shared only allow RX parameters to be set */
 640         efx_for_each_tx_queue(tx_queue, efx) {
 641                 if ((tx_queue->channel->used_flags == EFX_USED_BY_RX_TX) &&
 642                     tx_usecs) {
 643                         EFX_ERR(efx, "Channel is shared. "
 644                                 "Only RX coalescing may be set\n");
 645                         return -EOPNOTSUPP;
 646                 }
 647         }
 648
 649         efx_init_irq_moderation(efx, tx_usecs, rx_usecs, adaptive);
 650         efx_for_each_channel(channel, efx)
 651                 falcon_set_int_moderation(channel);
 652
 653         return 0;
 654 }
 655
 656 static int efx_ethtool_set_pauseparam(struct net_device *net_dev,
 657                                       struct ethtool_pauseparam *pause)
 658 {
 659         struct efx_nic *efx = netdev_priv(net_dev);
 660         enum efx_fc_type wanted_fc;
 661         bool reset;
 662
 663         wanted_fc = ((pause->rx_pause ? EFX_FC_RX : 0) |
 664                      (pause->tx_pause ? EFX_FC_TX : 0) |
 665                      (pause->autoneg ? EFX_FC_AUTO : 0));
 666
 667         if ((wanted_fc & EFX_FC_TX) && !(wanted_fc & EFX_FC_RX)) {
 668                 EFX_LOG(efx, "Flow control unsupported: tx ON rx OFF\n");
 669                 return -EINVAL;
 670         }
 671
 672         if (!(efx->phy_op->mmds & MDIO_DEVS_AN) &&
 673             (wanted_fc & EFX_FC_AUTO)) {
 674                 EFX_LOG(efx, "PHY does not support flow control "
 675                         "autonegotiation\n");
 676                 return -EINVAL;
 677         }
 678
 679         /* TX flow control may automatically turn itself off if the
 680          * link partner (intermittently) stops responding to pause
 681          * frames. There isn't any indication that this has happened,
 682          * so the best we do is leave it up to the user to spot this
 683          * and fix it be cycling transmit flow control on this end. */
 684         reset = (wanted_fc & EFX_FC_TX) && !(efx->wanted_fc & EFX_FC_TX);
 685         if (EFX_WORKAROUND_11482(efx) && reset) {
 686                 if (falcon_rev(efx) >= FALCON_REV_B0) {
 687                         /* Recover by resetting the EM block */
 688                         if (efx->link_state.up)
 689                                 falcon_drain_tx_fifo(efx);
 690                 } else {
 691                         /* Schedule a reset to recover */
 692                         efx_schedule_reset(efx, RESET_TYPE_INVISIBLE);
 693                 }
 694         }
 695
 696         /* Try to push the pause parameters */
 697         mutex_lock(&efx->mac_lock);
 698
 699         efx->wanted_fc = wanted_fc;
 700         if (efx->phy_op->mmds & MDIO_DEVS_AN)
 701                 mdio45_ethtool_spauseparam_an(&efx->mdio, pause);
 702         __efx_reconfigure_port(efx);
 703
 704         mutex_unlock(&efx->mac_lock);
 705
 706         return 0;
 707 }
 708
 709 static void efx_ethtool_get_pauseparam(struct net_device *net_dev,
 710                                        struct ethtool_pauseparam *pause)
 711 {
 712         struct efx_nic *efx = netdev_priv(net_dev);
 713
 714         pause->rx_pause = !!(efx->wanted_fc & EFX_FC_RX);
 715         pause->tx_pause = !!(efx->wanted_fc & EFX_FC_TX);
 716         pause->autoneg = !!(efx->wanted_fc & EFX_FC_AUTO);
 717 }
 718
 719
 720 const struct ethtool_ops efx_ethtool_ops = {
 721         .get_settings           = efx_ethtool_get_settings,
 722         .set_settings           = efx_ethtool_set_settings,
 723         .get_drvinfo            = efx_ethtool_get_drvinfo,
 724         .nway_reset             = efx_ethtool_nway_reset,
 725         .get_link               = efx_ethtool_get_link,
 726         .get_eeprom_len         = efx_ethtool_get_eeprom_len,
 727         .get_eeprom             = efx_ethtool_get_eeprom,
 728         .set_eeprom             = efx_ethtool_set_eeprom,
 729         .get_coalesce           = efx_ethtool_get_coalesce,
 730         .set_coalesce           = efx_ethtool_set_coalesce,
 731         .get_pauseparam         = efx_ethtool_get_pauseparam,
 732         .set_pauseparam         = efx_ethtool_set_pauseparam,
 733         .get_rx_csum            = efx_ethtool_get_rx_csum,
 734         .set_rx_csum            = efx_ethtool_set_rx_csum,
 735         .get_tx_csum            = ethtool_op_get_tx_csum,
 736         .set_tx_csum            = ethtool_op_set_tx_csum,
 737         .get_sg                 = ethtool_op_get_sg,
 738         .set_sg                 = ethtool_op_set_sg,
 739         .get_tso                = ethtool_op_get_tso,
 740         .set_tso                = ethtool_op_set_tso,
 741         .get_flags              = ethtool_op_get_flags,
 742         .set_flags              = ethtool_op_set_flags,
 743         .get_sset_count         = efx_ethtool_get_sset_count,
 744         .self_test              = efx_ethtool_self_test,
 745         .get_strings            = efx_ethtool_get_strings,
 746         .phys_id                = efx_ethtool_phys_id,
 747         .get_ethtool_stats      = efx_ethtool_get_stats,
 748 };