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