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