drivers/s390/net/qeth_ethtool.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright IBM Corp. 2018
   4  */
   5
   6 #define KMSG_COMPONENT "qeth"
   7 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
   8
   9 #include <linux/ethtool.h>
  10 #include "qeth_core.h"
  11
  12
  13 #define QETH_TXQ_STAT(_name, _stat) { \
  14         .name = _name, \
  15         .offset = offsetof(struct qeth_out_q_stats, _stat) \
  16 }
  17
  18 #define QETH_CARD_STAT(_name, _stat) { \
  19         .name = _name, \
  20         .offset = offsetof(struct qeth_card_stats, _stat) \
  21 }
  22
  23 struct qeth_stats {
  24         char name[ETH_GSTRING_LEN];
  25         unsigned int offset;
  26 };
  27
  28 static const struct qeth_stats txq_stats[] = {
  29         QETH_TXQ_STAT("IO buffers", bufs),
  30         QETH_TXQ_STAT("IO buffer elements", buf_elements),
  31         QETH_TXQ_STAT("packed IO buffers", bufs_pack),
  32         QETH_TXQ_STAT("skbs", tx_packets),
  33         QETH_TXQ_STAT("packed skbs", skbs_pack),
  34         QETH_TXQ_STAT("SG skbs", skbs_sg),
  35         QETH_TXQ_STAT("HW csum skbs", skbs_csum),
  36         QETH_TXQ_STAT("TSO skbs", skbs_tso),
  37         QETH_TXQ_STAT("linearized skbs", skbs_linearized),
  38         QETH_TXQ_STAT("linearized+error skbs", skbs_linearized_fail),
  39         QETH_TXQ_STAT("TSO bytes", tso_bytes),
  40         QETH_TXQ_STAT("Packing mode switches", packing_mode_switch),
  41         QETH_TXQ_STAT("Queue stopped", stopped),
  42         QETH_TXQ_STAT("Doorbell", doorbell),
  43         QETH_TXQ_STAT("IRQ for frames", coal_frames),
  44         QETH_TXQ_STAT("Completion yield", completion_yield),
  45         QETH_TXQ_STAT("Completion timer", completion_timer),
  46 };
  47
  48 static const struct qeth_stats card_stats[] = {
  49         QETH_CARD_STAT("rx0 IO buffers", rx_bufs),
  50         QETH_CARD_STAT("rx0 HW csum skbs", rx_skb_csum),
  51         QETH_CARD_STAT("rx0 SG skbs", rx_sg_skbs),
  52         QETH_CARD_STAT("rx0 SG page frags", rx_sg_frags),
  53         QETH_CARD_STAT("rx0 SG page allocs", rx_sg_alloc_page),
  54         QETH_CARD_STAT("rx0 dropped, no memory", rx_dropped_nomem),
  55         QETH_CARD_STAT("rx0 dropped, bad format", rx_dropped_notsupp),
  56         QETH_CARD_STAT("rx0 dropped, runt", rx_dropped_runt),
  57 };
  58
  59 #define TXQ_STATS_LEN   ARRAY_SIZE(txq_stats)
  60 #define CARD_STATS_LEN  ARRAY_SIZE(card_stats)
  61
  62 static void qeth_add_stat_data(u64 **dst, void *src,
  63                                const struct qeth_stats stats[],
  64                                unsigned int size)
  65 {
  66         unsigned int i;
  67         char *stat;
  68
  69         for (i = 0; i < size; i++) {
  70                 stat = (char *)src + stats[i].offset;
  71                 **dst = *(u64 *)stat;
  72                 (*dst)++;
  73         }
  74 }
  75
  76 static void qeth_add_stat_strings(u8 **data, const char *prefix,
  77                                   const struct qeth_stats stats[],
  78                                   unsigned int size)
  79 {
  80         unsigned int i;
  81
  82         for (i = 0; i < size; i++) {
  83                 snprintf(*data, ETH_GSTRING_LEN, "%s%s", prefix, stats[i].name);
  84                 *data += ETH_GSTRING_LEN;
  85         }
  86 }
  87
  88 static int qeth_get_sset_count(struct net_device *dev, int stringset)
  89 {
  90         struct qeth_card *card = dev->ml_priv;
  91
  92         switch (stringset) {
  93         case ETH_SS_STATS:
  94                 return CARD_STATS_LEN +
  95                        card->qdio.no_out_queues * TXQ_STATS_LEN;
  96         default:
  97                 return -EINVAL;
  98         }
  99 }
 100
 101 static void qeth_get_ethtool_stats(struct net_device *dev,
 102                                    struct ethtool_stats *stats, u64 *data)
 103 {
 104         struct qeth_card *card = dev->ml_priv;
 105         unsigned int i;
 106
 107         qeth_add_stat_data(&data, &card->stats, card_stats, CARD_STATS_LEN);
 108         for (i = 0; i < card->qdio.no_out_queues; i++)
 109                 qeth_add_stat_data(&data, &card->qdio.out_qs[i]->stats,
 110                                    txq_stats, TXQ_STATS_LEN);
 111 }
 112
 113 static void __qeth_set_coalesce(struct net_device *dev,
 114                                 struct qeth_qdio_out_q *queue,
 115                                 struct ethtool_coalesce *coal)
 116 {
 117         WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs);
 118         WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames);
 119
 120         if (coal->tx_coalesce_usecs &&
 121             netif_running(dev) &&
 122             !qeth_out_queue_is_empty(queue))
 123                 qeth_tx_arm_timer(queue, coal->tx_coalesce_usecs);
 124 }
 125
 126 static int qeth_set_coalesce(struct net_device *dev,
 127                              struct ethtool_coalesce *coal)
 128 {
 129         struct qeth_card *card = dev->ml_priv;
 130         struct qeth_qdio_out_q *queue;
 131         unsigned int i;
 132
 133         if (!IS_IQD(card))
 134                 return -EOPNOTSUPP;
 135
 136         if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
 137                 return -EINVAL;
 138
 139         qeth_for_each_output_queue(card, queue, i)
 140                 __qeth_set_coalesce(dev, queue, coal);
 141
 142         return 0;
 143 }
 144
 145 static void qeth_get_ringparam(struct net_device *dev,
 146                                struct ethtool_ringparam *param)
 147 {
 148         struct qeth_card *card = dev->ml_priv;
 149
 150         param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
 151         param->rx_mini_max_pending = 0;
 152         param->rx_jumbo_max_pending = 0;
 153         param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
 154
 155         param->rx_pending = card->qdio.in_buf_pool.buf_count;
 156         param->rx_mini_pending = 0;
 157         param->rx_jumbo_pending = 0;
 158         param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
 159 }
 160
 161 static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 162 {
 163         struct qeth_card *card = dev->ml_priv;
 164         char prefix[ETH_GSTRING_LEN] = "";
 165         unsigned int i;
 166
 167         switch (stringset) {
 168         case ETH_SS_STATS:
 169                 qeth_add_stat_strings(&data, prefix, card_stats,
 170                                       CARD_STATS_LEN);
 171                 for (i = 0; i < card->qdio.no_out_queues; i++) {
 172                         snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
 173                         qeth_add_stat_strings(&data, prefix, txq_stats,
 174                                               TXQ_STATS_LEN);
 175                 }
 176                 break;
 177         default:
 178                 WARN_ON(1);
 179                 break;
 180         }
 181 }
 182
 183 static void qeth_get_drvinfo(struct net_device *dev,
 184                              struct ethtool_drvinfo *info)
 185 {
 186         struct qeth_card *card = dev->ml_priv;
 187
 188         strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
 189                 sizeof(info->driver));
 190         strlcpy(info->fw_version, card->info.mcl_level,
 191                 sizeof(info->fw_version));
 192         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
 193                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
 194 }
 195
 196 static void qeth_get_channels(struct net_device *dev,
 197                               struct ethtool_channels *channels)
 198 {
 199         struct qeth_card *card = dev->ml_priv;
 200
 201         channels->max_rx = dev->num_rx_queues;
 202         channels->max_tx = card->qdio.no_out_queues;
 203         channels->max_other = 0;
 204         channels->max_combined = 0;
 205         channels->rx_count = dev->real_num_rx_queues;
 206         channels->tx_count = dev->real_num_tx_queues;
 207         channels->other_count = 0;
 208         channels->combined_count = 0;
 209 }
 210
 211 static int qeth_set_channels(struct net_device *dev,
 212                              struct ethtool_channels *channels)
 213 {
 214         struct qeth_priv *priv = netdev_priv(dev);
 215         struct qeth_card *card = dev->ml_priv;
 216         int rc;
 217
 218         if (channels->rx_count == 0 || channels->tx_count == 0)
 219                 return -EINVAL;
 220         if (channels->tx_count > card->qdio.no_out_queues)
 221                 return -EINVAL;
 222
 223         /* Prio-queueing needs all TX queues: */
 224         if (qeth_uses_tx_prio_queueing(card))
 225                 return -EPERM;
 226
 227         if (IS_IQD(card)) {
 228                 if (channels->tx_count < QETH_IQD_MIN_TXQ)
 229                         return -EINVAL;
 230
 231                 /* Reject downgrade while running. It could push displaced
 232                  * ucast flows onto txq0, which is reserved for mcast.
 233                  */
 234                 if (netif_running(dev) &&
 235                     channels->tx_count < dev->real_num_tx_queues)
 236                         return -EPERM;
 237         }
 238
 239         rc = qeth_set_real_num_tx_queues(card, channels->tx_count);
 240         if (!rc)
 241                 priv->tx_wanted_queues = channels->tx_count;
 242
 243         return rc;
 244 }
 245
 246 static int qeth_get_ts_info(struct net_device *dev,
 247                             struct ethtool_ts_info *info)
 248 {
 249         struct qeth_card *card = dev->ml_priv;
 250
 251         if (!IS_IQD(card))
 252                 return -EOPNOTSUPP;
 253
 254         return ethtool_op_get_ts_info(dev, info);
 255 }
 256
 257 static int qeth_get_tunable(struct net_device *dev,
 258                             const struct ethtool_tunable *tuna, void *data)
 259 {
 260         struct qeth_priv *priv = netdev_priv(dev);
 261
 262         switch (tuna->id) {
 263         case ETHTOOL_RX_COPYBREAK:
 264                 *(u32 *)data = priv->rx_copybreak;
 265                 return 0;
 266         default:
 267                 return -EOPNOTSUPP;
 268         }
 269 }
 270
 271 static int qeth_set_tunable(struct net_device *dev,
 272                             const struct ethtool_tunable *tuna,
 273                             const void *data)
 274 {
 275         struct qeth_priv *priv = netdev_priv(dev);
 276
 277         switch (tuna->id) {
 278         case ETHTOOL_RX_COPYBREAK:
 279                 WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
 280                 return 0;
 281         default:
 282                 return -EOPNOTSUPP;
 283         }
 284 }
 285
 286 static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
 287                                        struct ethtool_coalesce *coal)
 288 {
 289         struct qeth_card *card = dev->ml_priv;
 290         struct qeth_qdio_out_q *queue;
 291
 292         if (!IS_IQD(card))
 293                 return -EOPNOTSUPP;
 294
 295         if (__queue >= card->qdio.no_out_queues)
 296                 return -EINVAL;
 297
 298         queue = card->qdio.out_qs[__queue];
 299
 300         coal->tx_coalesce_usecs = queue->coalesce_usecs;
 301         coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
 302         return 0;
 303 }
 304
 305 static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
 306                                        struct ethtool_coalesce *coal)
 307 {
 308         struct qeth_card *card = dev->ml_priv;
 309
 310         if (!IS_IQD(card))
 311                 return -EOPNOTSUPP;
 312
 313         if (queue >= card->qdio.no_out_queues)
 314                 return -EINVAL;
 315
 316         if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
 317                 return -EINVAL;
 318
 319         __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
 320         return 0;
 321 }
 322
 323 /* Helper function to fill 'advertising' and 'supported' which are the same. */
 324 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
 325 /* Always advertise and support all speeds up to specified, and only one     */
 326 /* specified port type.                                                      */
 327 static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd,
 328                                         enum qeth_link_mode link_mode)
 329 {
 330         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 331         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 332         ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
 333
 334         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 335         ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 336
 337         switch (cmd->base.port) {
 338         case PORT_TP:
 339                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 340                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 341
 342                 switch (cmd->base.speed) {
 343                 case SPEED_10000:
 344                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 345                                                              10000baseT_Full);
 346                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 347                                                              10000baseT_Full);
 348                         fallthrough;
 349                 case SPEED_1000:
 350                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 351                                                              1000baseT_Full);
 352                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 353                                                              1000baseT_Full);
 354                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 355                                                              1000baseT_Half);
 356                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 357                                                              1000baseT_Half);
 358                         fallthrough;
 359                 case SPEED_100:
 360                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 361                                                              100baseT_Full);
 362                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 363                                                              100baseT_Full);
 364                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 365                                                              100baseT_Half);
 366                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 367                                                              100baseT_Half);
 368                         fallthrough;
 369                 case SPEED_10:
 370                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 371                                                              10baseT_Full);
 372                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 373                                                              10baseT_Full);
 374                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 375                                                              10baseT_Half);
 376                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 377                                                              10baseT_Half);
 378                         break;
 379                 default:
 380                         break;
 381                 }
 382
 383                 break;
 384         case PORT_FIBRE:
 385                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
 386                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
 387
 388                 switch (cmd->base.speed) {
 389                 case SPEED_25000:
 390                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 391                                                              25000baseSR_Full);
 392                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 393                                                              25000baseSR_Full);
 394                         break;
 395                 case SPEED_10000:
 396                         if (link_mode == QETH_LINK_MODE_FIBRE_LONG) {
 397                                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 398                                                                      10000baseLR_Full);
 399                                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 400                                                                      10000baseLR_Full);
 401                         } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) {
 402                                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 403                                                                      10000baseSR_Full);
 404                                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 405                                                                      10000baseSR_Full);
 406                         }
 407                         break;
 408                 case SPEED_1000:
 409                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 410                                                              1000baseX_Full);
 411                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 412                                                              1000baseX_Full);
 413                         break;
 414                 default:
 415                         break;
 416                 }
 417
 418                 break;
 419         default:
 420                 break;
 421         }
 422 }
 423
 424 static int qeth_get_link_ksettings(struct net_device *netdev,
 425                                    struct ethtool_link_ksettings *cmd)
 426 {
 427         struct qeth_card *card = netdev->ml_priv;
 428         struct qeth_link_info link_info;
 429
 430         cmd->base.speed = card->info.link_info.speed;
 431         cmd->base.duplex = card->info.link_info.duplex;
 432         cmd->base.port = card->info.link_info.port;
 433         cmd->base.autoneg = AUTONEG_ENABLE;
 434         cmd->base.phy_address = 0;
 435         cmd->base.mdio_support = 0;
 436         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
 437         cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
 438
 439         /* Check if we can obtain more accurate information.     */
 440         if (!qeth_query_card_info(card, &link_info)) {
 441                 if (link_info.speed != SPEED_UNKNOWN)
 442                         cmd->base.speed = link_info.speed;
 443                 if (link_info.duplex != DUPLEX_UNKNOWN)
 444                         cmd->base.duplex = link_info.duplex;
 445                 if (link_info.port != PORT_OTHER)
 446                         cmd->base.port = link_info.port;
 447         }
 448
 449         qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode);
 450
 451         return 0;
 452 }
 453
 454 const struct ethtool_ops qeth_ethtool_ops = {
 455         .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
 456                                      ETHTOOL_COALESCE_TX_MAX_FRAMES,
 457         .get_link = ethtool_op_get_link,
 458         .set_coalesce = qeth_set_coalesce,
 459         .get_ringparam = qeth_get_ringparam,
 460         .get_strings = qeth_get_strings,
 461         .get_ethtool_stats = qeth_get_ethtool_stats,
 462         .get_sset_count = qeth_get_sset_count,
 463         .get_drvinfo = qeth_get_drvinfo,
 464         .get_channels = qeth_get_channels,
 465         .set_channels = qeth_set_channels,
 466         .get_ts_info = qeth_get_ts_info,
 467         .get_tunable = qeth_get_tunable,
 468         .set_tunable = qeth_set_tunable,
 469         .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
 470         .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
 471         .get_link_ksettings = qeth_get_link_ksettings,
 472 };
 473
 474 const struct ethtool_ops qeth_osn_ethtool_ops = {
 475         .get_strings = qeth_get_strings,
 476         .get_ethtool_stats = qeth_get_ethtool_stats,
 477         .get_sset_count = qeth_get_sset_count,
 478         .get_drvinfo = qeth_get_drvinfo,
 479 };