drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2016 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
  16  * with 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 i40evf */
  28 #include "i40evf.h"
  29
  30 #include <linux/uaccess.h>
  31
  32 struct i40evf_stats {
  33         char stat_string[ETH_GSTRING_LEN];
  34         int stat_offset;
  35 };
  36
  37 #define I40EVF_STAT(_name, _stat) { \
  38         .stat_string = _name, \
  39         .stat_offset = offsetof(struct i40evf_adapter, _stat) \
  40 }
  41
  42 /* All stats are u64, so we don't need to track the size of the field. */
  43 static const struct i40evf_stats i40evf_gstrings_stats[] = {
  44         I40EVF_STAT("rx_bytes", current_stats.rx_bytes),
  45         I40EVF_STAT("rx_unicast", current_stats.rx_unicast),
  46         I40EVF_STAT("rx_multicast", current_stats.rx_multicast),
  47         I40EVF_STAT("rx_broadcast", current_stats.rx_broadcast),
  48         I40EVF_STAT("rx_discards", current_stats.rx_discards),
  49         I40EVF_STAT("rx_unknown_protocol", current_stats.rx_unknown_protocol),
  50         I40EVF_STAT("tx_bytes", current_stats.tx_bytes),
  51         I40EVF_STAT("tx_unicast", current_stats.tx_unicast),
  52         I40EVF_STAT("tx_multicast", current_stats.tx_multicast),
  53         I40EVF_STAT("tx_broadcast", current_stats.tx_broadcast),
  54         I40EVF_STAT("tx_discards", current_stats.tx_discards),
  55         I40EVF_STAT("tx_errors", current_stats.tx_errors),
  56 };
  57
  58 #define I40EVF_GLOBAL_STATS_LEN ARRAY_SIZE(i40evf_gstrings_stats)
  59 #define I40EVF_QUEUE_STATS_LEN(_dev) \
  60         (((struct i40evf_adapter *)\
  61                 netdev_priv(_dev))->num_active_queues \
  62                   * 2 * (sizeof(struct i40e_queue_stats) / sizeof(u64)))
  63 #define I40EVF_STATS_LEN(_dev) \
  64         (I40EVF_GLOBAL_STATS_LEN + I40EVF_QUEUE_STATS_LEN(_dev))
  65
  66 /**
  67  * i40evf_get_settings - Get Link Speed and Duplex settings
  68  * @netdev: network interface device structure
  69  * @ecmd: ethtool command
  70  *
  71  * Reports speed/duplex settings. Because this is a VF, we don't know what
  72  * kind of link we really have, so we fake it.
  73  **/
  74 static int i40evf_get_settings(struct net_device *netdev,
  75                                struct ethtool_cmd *ecmd)
  76 {
  77         struct i40evf_adapter *adapter = netdev_priv(netdev);
  78
  79         ecmd->supported = 0;
  80         ecmd->autoneg = AUTONEG_DISABLE;
  81         ecmd->transceiver = XCVR_DUMMY1;
  82         ecmd->port = PORT_NONE;
  83         /* Set speed and duplex */
  84         switch (adapter->link_speed) {
  85         case I40E_LINK_SPEED_40GB:
  86                 ethtool_cmd_speed_set(ecmd, SPEED_40000);
  87                 break;
  88         case I40E_LINK_SPEED_20GB:
  89                 ethtool_cmd_speed_set(ecmd, SPEED_20000);
  90                 break;
  91         case I40E_LINK_SPEED_10GB:
  92                 ethtool_cmd_speed_set(ecmd, SPEED_10000);
  93                 break;
  94         case I40E_LINK_SPEED_1GB:
  95                 ethtool_cmd_speed_set(ecmd, SPEED_1000);
  96                 break;
  97         case I40E_LINK_SPEED_100MB:
  98                 ethtool_cmd_speed_set(ecmd, SPEED_100);
  99                 break;
 100         default:
 101                 break;
 102         }
 103         ecmd->duplex = DUPLEX_FULL;
 104
 105         return 0;
 106 }
 107
 108 /**
 109  * i40evf_get_sset_count - Get length of string set
 110  * @netdev: network interface device structure
 111  * @sset: id of string set
 112  *
 113  * Reports size of string table. This driver only supports
 114  * strings for statistics.
 115  **/
 116 static int i40evf_get_sset_count(struct net_device *netdev, int sset)
 117 {
 118         if (sset == ETH_SS_STATS)
 119                 return I40EVF_STATS_LEN(netdev);
 120         else
 121                 return -EINVAL;
 122 }
 123
 124 /**
 125  * i40evf_get_ethtool_stats - report device statistics
 126  * @netdev: network interface device structure
 127  * @stats: ethtool statistics structure
 128  * @data: pointer to data buffer
 129  *
 130  * All statistics are added to the data buffer as an array of u64.
 131  **/
 132 static void i40evf_get_ethtool_stats(struct net_device *netdev,
 133                                      struct ethtool_stats *stats, u64 *data)
 134 {
 135         struct i40evf_adapter *adapter = netdev_priv(netdev);
 136         int i, j;
 137         char *p;
 138
 139         for (i = 0; i < I40EVF_GLOBAL_STATS_LEN; i++) {
 140                 p = (char *)adapter + i40evf_gstrings_stats[i].stat_offset;
 141                 data[i] =  *(u64 *)p;
 142         }
 143         for (j = 0; j < adapter->num_active_queues; j++) {
 144                 data[i++] = adapter->tx_rings[j].stats.packets;
 145                 data[i++] = adapter->tx_rings[j].stats.bytes;
 146         }
 147         for (j = 0; j < adapter->num_active_queues; j++) {
 148                 data[i++] = adapter->rx_rings[j].stats.packets;
 149                 data[i++] = adapter->rx_rings[j].stats.bytes;
 150         }
 151 }
 152
 153 /**
 154  * i40evf_get_strings - Get string set
 155  * @netdev: network interface device structure
 156  * @sset: id of string set
 157  * @data: buffer for string data
 158  *
 159  * Builds stats string table.
 160  **/
 161 static void i40evf_get_strings(struct net_device *netdev, u32 sset, u8 *data)
 162 {
 163         struct i40evf_adapter *adapter = netdev_priv(netdev);
 164         u8 *p = data;
 165         int i;
 166
 167         if (sset == ETH_SS_STATS) {
 168                 for (i = 0; i < I40EVF_GLOBAL_STATS_LEN; i++) {
 169                         memcpy(p, i40evf_gstrings_stats[i].stat_string,
 170                                ETH_GSTRING_LEN);
 171                         p += ETH_GSTRING_LEN;
 172                 }
 173                 for (i = 0; i < adapter->num_active_queues; i++) {
 174                         snprintf(p, ETH_GSTRING_LEN, "tx-%u.packets", i);
 175                         p += ETH_GSTRING_LEN;
 176                         snprintf(p, ETH_GSTRING_LEN, "tx-%u.bytes", i);
 177                         p += ETH_GSTRING_LEN;
 178                 }
 179                 for (i = 0; i < adapter->num_active_queues; i++) {
 180                         snprintf(p, ETH_GSTRING_LEN, "rx-%u.packets", i);
 181                         p += ETH_GSTRING_LEN;
 182                         snprintf(p, ETH_GSTRING_LEN, "rx-%u.bytes", i);
 183                         p += ETH_GSTRING_LEN;
 184                 }
 185         }
 186 }
 187
 188 /**
 189  * i40evf_get_msglevel - Get debug message level
 190  * @netdev: network interface device structure
 191  *
 192  * Returns current debug message level.
 193  **/
 194 static u32 i40evf_get_msglevel(struct net_device *netdev)
 195 {
 196         struct i40evf_adapter *adapter = netdev_priv(netdev);
 197
 198         return adapter->msg_enable;
 199 }
 200
 201 /**
 202  * i40evf_set_msglevel - Set debug message level
 203  * @netdev: network interface device structure
 204  * @data: message level
 205  *
 206  * Set current debug message level. Higher values cause the driver to
 207  * be noisier.
 208  **/
 209 static void i40evf_set_msglevel(struct net_device *netdev, u32 data)
 210 {
 211         struct i40evf_adapter *adapter = netdev_priv(netdev);
 212
 213         if (I40E_DEBUG_USER & data)
 214                 adapter->hw.debug_mask = data;
 215         adapter->msg_enable = data;
 216 }
 217
 218 /**
 219  * i40evf_get_drvinfo - Get driver info
 220  * @netdev: network interface device structure
 221  * @drvinfo: ethool driver info structure
 222  *
 223  * Returns information about the driver and device for display to the user.
 224  **/
 225 static void i40evf_get_drvinfo(struct net_device *netdev,
 226                                struct ethtool_drvinfo *drvinfo)
 227 {
 228         struct i40evf_adapter *adapter = netdev_priv(netdev);
 229
 230         strlcpy(drvinfo->driver, i40evf_driver_name, 32);
 231         strlcpy(drvinfo->version, i40evf_driver_version, 32);
 232         strlcpy(drvinfo->fw_version, "N/A", 4);
 233         strlcpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
 234 }
 235
 236 /**
 237  * i40evf_get_ringparam - Get ring parameters
 238  * @netdev: network interface device structure
 239  * @ring: ethtool ringparam structure
 240  *
 241  * Returns current ring parameters. TX and RX rings are reported separately,
 242  * but the number of rings is not reported.
 243  **/
 244 static void i40evf_get_ringparam(struct net_device *netdev,
 245                                  struct ethtool_ringparam *ring)
 246 {
 247         struct i40evf_adapter *adapter = netdev_priv(netdev);
 248
 249         ring->rx_max_pending = I40EVF_MAX_RXD;
 250         ring->tx_max_pending = I40EVF_MAX_TXD;
 251         ring->rx_pending = adapter->rx_desc_count;
 252         ring->tx_pending = adapter->tx_desc_count;
 253 }
 254
 255 /**
 256  * i40evf_set_ringparam - Set ring parameters
 257  * @netdev: network interface device structure
 258  * @ring: ethtool ringparam structure
 259  *
 260  * Sets ring parameters. TX and RX rings are controlled separately, but the
 261  * number of rings is not specified, so all rings get the same settings.
 262  **/
 263 static int i40evf_set_ringparam(struct net_device *netdev,
 264                                 struct ethtool_ringparam *ring)
 265 {
 266         struct i40evf_adapter *adapter = netdev_priv(netdev);
 267         u32 new_rx_count, new_tx_count;
 268
 269         if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
 270                 return -EINVAL;
 271
 272         new_tx_count = clamp_t(u32, ring->tx_pending,
 273                                I40EVF_MIN_TXD,
 274                                I40EVF_MAX_TXD);
 275         new_tx_count = ALIGN(new_tx_count, I40EVF_REQ_DESCRIPTOR_MULTIPLE);
 276
 277         new_rx_count = clamp_t(u32, ring->rx_pending,
 278                                I40EVF_MIN_RXD,
 279                                I40EVF_MAX_RXD);
 280         new_rx_count = ALIGN(new_rx_count, I40EVF_REQ_DESCRIPTOR_MULTIPLE);
 281
 282         /* if nothing to do return success */
 283         if ((new_tx_count == adapter->tx_desc_count) &&
 284             (new_rx_count == adapter->rx_desc_count))
 285                 return 0;
 286
 287         adapter->tx_desc_count = new_tx_count;
 288         adapter->rx_desc_count = new_rx_count;
 289
 290         if (netif_running(netdev)) {
 291                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 292                 schedule_work(&adapter->reset_task);
 293         }
 294
 295         return 0;
 296 }
 297
 298 /**
 299  * i40evf_get_coalesce - Get interrupt coalescing settings
 300  * @netdev: network interface device structure
 301  * @ec: ethtool coalesce structure
 302  *
 303  * Returns current coalescing settings. This is referred to elsewhere in the
 304  * driver as Interrupt Throttle Rate, as this is how the hardware describes
 305  * this functionality.
 306  **/
 307 static int i40evf_get_coalesce(struct net_device *netdev,
 308                                struct ethtool_coalesce *ec)
 309 {
 310         struct i40evf_adapter *adapter = netdev_priv(netdev);
 311         struct i40e_vsi *vsi = &adapter->vsi;
 312
 313         ec->tx_max_coalesced_frames = vsi->work_limit;
 314         ec->rx_max_coalesced_frames = vsi->work_limit;
 315
 316         if (ITR_IS_DYNAMIC(vsi->rx_itr_setting))
 317                 ec->use_adaptive_rx_coalesce = 1;
 318
 319         if (ITR_IS_DYNAMIC(vsi->tx_itr_setting))
 320                 ec->use_adaptive_tx_coalesce = 1;
 321
 322         ec->rx_coalesce_usecs = vsi->rx_itr_setting & ~I40E_ITR_DYNAMIC;
 323         ec->tx_coalesce_usecs = vsi->tx_itr_setting & ~I40E_ITR_DYNAMIC;
 324
 325         return 0;
 326 }
 327
 328 /**
 329  * i40evf_set_coalesce - Set interrupt coalescing settings
 330  * @netdev: network interface device structure
 331  * @ec: ethtool coalesce structure
 332  *
 333  * Change current coalescing settings.
 334  **/
 335 static int i40evf_set_coalesce(struct net_device *netdev,
 336                                struct ethtool_coalesce *ec)
 337 {
 338         struct i40evf_adapter *adapter = netdev_priv(netdev);
 339         struct i40e_hw *hw = &adapter->hw;
 340         struct i40e_vsi *vsi = &adapter->vsi;
 341         struct i40e_q_vector *q_vector;
 342         int i;
 343
 344         if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
 345                 vsi->work_limit = ec->tx_max_coalesced_frames_irq;
 346
 347         if ((ec->rx_coalesce_usecs >= (I40E_MIN_ITR << 1)) &&
 348             (ec->rx_coalesce_usecs <= (I40E_MAX_ITR << 1)))
 349                 vsi->rx_itr_setting = ec->rx_coalesce_usecs;
 350
 351         else
 352                 return -EINVAL;
 353
 354         if ((ec->tx_coalesce_usecs >= (I40E_MIN_ITR << 1)) &&
 355             (ec->tx_coalesce_usecs <= (I40E_MAX_ITR << 1)))
 356                 vsi->tx_itr_setting = ec->tx_coalesce_usecs;
 357         else if (ec->use_adaptive_tx_coalesce)
 358                 vsi->tx_itr_setting = (I40E_ITR_DYNAMIC |
 359                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
 360         else
 361                 return -EINVAL;
 362
 363         if (ec->use_adaptive_rx_coalesce)
 364                 vsi->rx_itr_setting |= I40E_ITR_DYNAMIC;
 365         else
 366                 vsi->rx_itr_setting &= ~I40E_ITR_DYNAMIC;
 367
 368         if (ec->use_adaptive_tx_coalesce)
 369                 vsi->tx_itr_setting |= I40E_ITR_DYNAMIC;
 370         else
 371                 vsi->tx_itr_setting &= ~I40E_ITR_DYNAMIC;
 372
 373         for (i = 0; i < adapter->num_msix_vectors - NONQ_VECS; i++) {
 374                 q_vector = &adapter->q_vectors[i];
 375                 q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
 376                 wr32(hw, I40E_VFINT_ITRN1(0, i), q_vector->rx.itr);
 377                 q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
 378                 wr32(hw, I40E_VFINT_ITRN1(1, i), q_vector->tx.itr);
 379                 i40e_flush(hw);
 380         }
 381
 382         return 0;
 383 }
 384
 385 /**
 386  * i40evf_get_rxnfc - command to get RX flow classification rules
 387  * @netdev: network interface device structure
 388  * @cmd: ethtool rxnfc command
 389  *
 390  * Returns Success if the command is supported.
 391  **/
 392 static int i40evf_get_rxnfc(struct net_device *netdev,
 393                             struct ethtool_rxnfc *cmd,
 394                             u32 *rule_locs)
 395 {
 396         struct i40evf_adapter *adapter = netdev_priv(netdev);
 397         int ret = -EOPNOTSUPP;
 398
 399         switch (cmd->cmd) {
 400         case ETHTOOL_GRXRINGS:
 401                 cmd->data = adapter->num_active_queues;
 402                 ret = 0;
 403                 break;
 404         case ETHTOOL_GRXFH:
 405                 netdev_info(netdev,
 406                             "RSS hash info is not available to vf, use pf.\n");
 407                 break;
 408         default:
 409                 break;
 410         }
 411
 412         return ret;
 413 }
 414 /**
 415  * i40evf_get_channels: get the number of channels supported by the device
 416  * @netdev: network interface device structure
 417  * @ch: channel information structure
 418  *
 419  * For the purposes of our device, we only use combined channels, i.e. a tx/rx
 420  * queue pair. Report one extra channel to match our "other" MSI-X vector.
 421  **/
 422 static void i40evf_get_channels(struct net_device *netdev,
 423                                 struct ethtool_channels *ch)
 424 {
 425         struct i40evf_adapter *adapter = netdev_priv(netdev);
 426
 427         /* Report maximum channels */
 428         ch->max_combined = adapter->num_active_queues;
 429
 430         ch->max_other = NONQ_VECS;
 431         ch->other_count = NONQ_VECS;
 432
 433         ch->combined_count = adapter->num_active_queues;
 434 }
 435
 436 /**
 437  * i40evf_get_rxfh_key_size - get the RSS hash key size
 438  * @netdev: network interface device structure
 439  *
 440  * Returns the table size.
 441  **/
 442 static u32 i40evf_get_rxfh_key_size(struct net_device *netdev)
 443 {
 444         struct i40evf_adapter *adapter = netdev_priv(netdev);
 445
 446         return adapter->rss_key_size;
 447 }
 448
 449 /**
 450  * i40evf_get_rxfh_indir_size - get the rx flow hash indirection table size
 451  * @netdev: network interface device structure
 452  *
 453  * Returns the table size.
 454  **/
 455 static u32 i40evf_get_rxfh_indir_size(struct net_device *netdev)
 456 {
 457         struct i40evf_adapter *adapter = netdev_priv(netdev);
 458
 459         return adapter->rss_lut_size;
 460 }
 461
 462 /**
 463  * i40evf_get_rxfh - get the rx flow hash indirection table
 464  * @netdev: network interface device structure
 465  * @indir: indirection table
 466  * @key: hash key
 467  *
 468  * Reads the indirection table directly from the hardware. Always returns 0.
 469  **/
 470 static int i40evf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
 471                            u8 *hfunc)
 472 {
 473         struct i40evf_adapter *adapter = netdev_priv(netdev);
 474         u16 i;
 475
 476         if (hfunc)
 477                 *hfunc = ETH_RSS_HASH_TOP;
 478         if (!indir)
 479                 return 0;
 480
 481         memcpy(key, adapter->rss_key, adapter->rss_key_size);
 482
 483         /* Each 32 bits pointed by 'indir' is stored with a lut entry */
 484         for (i = 0; i < adapter->rss_lut_size; i++)
 485                 indir[i] = (u32)adapter->rss_lut[i];
 486
 487         return 0;
 488 }
 489
 490 /**
 491  * i40evf_set_rxfh - set the rx flow hash indirection table
 492  * @netdev: network interface device structure
 493  * @indir: indirection table
 494  * @key: hash key
 495  *
 496  * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
 497  * returns 0 after programming the table.
 498  **/
 499 static int i40evf_set_rxfh(struct net_device *netdev, const u32 *indir,
 500                            const u8 *key, const u8 hfunc)
 501 {
 502         struct i40evf_adapter *adapter = netdev_priv(netdev);
 503         u16 i;
 504
 505         /* We do not allow change in unsupported parameters */
 506         if (key ||
 507             (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
 508                 return -EOPNOTSUPP;
 509         if (!indir)
 510                 return 0;
 511
 512         if (key) {
 513                 memcpy(adapter->rss_key, key, adapter->rss_key_size);
 514         }
 515
 516         /* Each 32 bits pointed by 'indir' is stored with a lut entry */
 517         for (i = 0; i < adapter->rss_lut_size; i++)
 518                 adapter->rss_lut[i] = (u8)(indir[i]);
 519
 520         return i40evf_config_rss(adapter);
 521 }
 522
 523 static const struct ethtool_ops i40evf_ethtool_ops = {
 524         .get_settings           = i40evf_get_settings,
 525         .get_drvinfo            = i40evf_get_drvinfo,
 526         .get_link               = ethtool_op_get_link,
 527         .get_ringparam          = i40evf_get_ringparam,
 528         .set_ringparam          = i40evf_set_ringparam,
 529         .get_strings            = i40evf_get_strings,
 530         .get_ethtool_stats      = i40evf_get_ethtool_stats,
 531         .get_sset_count         = i40evf_get_sset_count,
 532         .get_msglevel           = i40evf_get_msglevel,
 533         .set_msglevel           = i40evf_set_msglevel,
 534         .get_coalesce           = i40evf_get_coalesce,
 535         .set_coalesce           = i40evf_set_coalesce,
 536         .get_rxnfc              = i40evf_get_rxnfc,
 537         .get_rxfh_indir_size    = i40evf_get_rxfh_indir_size,
 538         .get_rxfh               = i40evf_get_rxfh,
 539         .set_rxfh               = i40evf_set_rxfh,
 540         .get_channels           = i40evf_get_channels,
 541         .get_rxfh_key_size      = i40evf_get_rxfh_key_size,
 542 };
 543
 544 /**
 545  * i40evf_set_ethtool_ops - Initialize ethtool ops struct
 546  * @netdev: network interface device structure
 547  *
 548  * Sets ethtool ops struct in our netdev so that ethtool can call
 549  * our functions.
 550  **/
 551 void i40evf_set_ethtool_ops(struct net_device *netdev)
 552 {
 553         netdev->ethtool_ops = &i40evf_ethtool_ops;
 554 }