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