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                                struct kernel_ethtool_ringparam *kernel_param,
 149                                struct netlink_ext_ack *extack)
 150 {
 151         struct qeth_card *card = dev->ml_priv;
 152
 153         param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
 154         param->rx_mini_max_pending = 0;
 155         param->rx_jumbo_max_pending = 0;
 156         param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
 157
 158         param->rx_pending = card->qdio.in_buf_pool.buf_count;
 159         param->rx_mini_pending = 0;
 160         param->rx_jumbo_pending = 0;
 161         param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
 162 }
 163
 164 static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 165 {
 166         struct qeth_card *card = dev->ml_priv;
 167         char prefix[ETH_GSTRING_LEN] = "";
 168         unsigned int i;
 169
 170         switch (stringset) {
 171         case ETH_SS_STATS:
 172                 qeth_add_stat_strings(&data, prefix, card_stats,
 173                                       CARD_STATS_LEN);
 174                 for (i = 0; i < card->qdio.no_out_queues; i++) {
 175                         scnprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
 176                         qeth_add_stat_strings(&data, prefix, txq_stats,
 177                                               TXQ_STATS_LEN);
 178                 }
 179                 break;
 180         default:
 181                 WARN_ON(1);
 182                 break;
 183         }
 184 }
 185
 186 static void qeth_get_drvinfo(struct net_device *dev,
 187                              struct ethtool_drvinfo *info)
 188 {
 189         struct qeth_card *card = dev->ml_priv;
 190
 191         strscpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
 192                 sizeof(info->driver));
 193         strscpy(info->fw_version, card->info.mcl_level,
 194                 sizeof(info->fw_version));
 195         scnprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
 196                   CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
 197 }
 198
 199 static void qeth_get_channels(struct net_device *dev,
 200                               struct ethtool_channels *channels)
 201 {
 202         struct qeth_card *card = dev->ml_priv;
 203
 204         channels->max_rx = dev->num_rx_queues;
 205         channels->max_tx = card->qdio.no_out_queues;
 206         channels->max_other = 0;
 207         channels->max_combined = 0;
 208         channels->rx_count = dev->real_num_rx_queues;
 209         channels->tx_count = dev->real_num_tx_queues;
 210         channels->other_count = 0;
 211         channels->combined_count = 0;
 212 }
 213
 214 static int qeth_set_channels(struct net_device *dev,
 215                              struct ethtool_channels *channels)
 216 {
 217         struct qeth_priv *priv = netdev_priv(dev);
 218         struct qeth_card *card = dev->ml_priv;
 219         int rc;
 220
 221         if (channels->rx_count == 0 || channels->tx_count == 0)
 222                 return -EINVAL;
 223         if (channels->tx_count > card->qdio.no_out_queues)
 224                 return -EINVAL;
 225
 226         /* Prio-queueing needs all TX queues: */
 227         if (qeth_uses_tx_prio_queueing(card))
 228                 return -EPERM;
 229
 230         if (IS_IQD(card)) {
 231                 if (channels->tx_count < QETH_IQD_MIN_TXQ)
 232                         return -EINVAL;
 233
 234                 /* Reject downgrade while running. It could push displaced
 235                  * ucast flows onto txq0, which is reserved for mcast.
 236                  */
 237                 if (netif_running(dev) &&
 238                     channels->tx_count < dev->real_num_tx_queues)
 239                         return -EPERM;
 240         }
 241
 242         rc = qeth_set_real_num_tx_queues(card, channels->tx_count);
 243         if (!rc)
 244                 priv->tx_wanted_queues = channels->tx_count;
 245
 246         return rc;
 247 }
 248
 249 static int qeth_get_ts_info(struct net_device *dev,
 250                             struct kernel_ethtool_ts_info *info)
 251 {
 252         struct qeth_card *card = dev->ml_priv;
 253
 254         if (!IS_IQD(card))
 255                 return -EOPNOTSUPP;
 256
 257         return ethtool_op_get_ts_info(dev, info);
 258 }
 259
 260 static int qeth_get_tunable(struct net_device *dev,
 261                             const struct ethtool_tunable *tuna, void *data)
 262 {
 263         struct qeth_priv *priv = netdev_priv(dev);
 264
 265         switch (tuna->id) {
 266         case ETHTOOL_RX_COPYBREAK:
 267                 *(u32 *)data = priv->rx_copybreak;
 268                 return 0;
 269         default:
 270                 return -EOPNOTSUPP;
 271         }
 272 }
 273
 274 static int qeth_set_tunable(struct net_device *dev,
 275                             const struct ethtool_tunable *tuna,
 276                             const void *data)
 277 {
 278         struct qeth_priv *priv = netdev_priv(dev);
 279
 280         switch (tuna->id) {
 281         case ETHTOOL_RX_COPYBREAK:
 282                 WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
 283                 return 0;
 284         default:
 285                 return -EOPNOTSUPP;
 286         }
 287 }
 288
 289 static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
 290                                        struct ethtool_coalesce *coal)
 291 {
 292         struct qeth_card *card = dev->ml_priv;
 293         struct qeth_qdio_out_q *queue;
 294
 295         if (!IS_IQD(card))
 296                 return -EOPNOTSUPP;
 297
 298         if (__queue >= card->qdio.no_out_queues)
 299                 return -EINVAL;
 300
 301         queue = card->qdio.out_qs[__queue];
 302
 303         coal->tx_coalesce_usecs = queue->coalesce_usecs;
 304         coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
 305         return 0;
 306 }
 307
 308 static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
 309                                        struct ethtool_coalesce *coal)
 310 {
 311         struct qeth_card *card = dev->ml_priv;
 312
 313         if (!IS_IQD(card))
 314                 return -EOPNOTSUPP;
 315
 316         if (queue >= card->qdio.no_out_queues)
 317                 return -EINVAL;
 318
 319         if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
 320                 return -EINVAL;
 321
 322         __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
 323         return 0;
 324 }
 325
 326 /* Helper function to fill 'advertising' and 'supported' which are the same. */
 327 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
 328 /* Always advertise and support all speeds up to specified, and only one     */
 329 /* specified port type.                                                      */
 330 static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd,
 331                                         enum qeth_link_mode link_mode)
 332 {
 333         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 334         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
 335         ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
 336
 337         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
 338         ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
 339
 340         switch (cmd->base.port) {
 341         case PORT_TP:
 342                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
 343                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
 344
 345                 switch (cmd->base.speed) {
 346                 case SPEED_10000:
 347                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 348                                                              10000baseT_Full);
 349                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 350                                                              10000baseT_Full);
 351                         fallthrough;
 352                 case SPEED_1000:
 353                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 354                                                              1000baseT_Full);
 355                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 356                                                              1000baseT_Full);
 357                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 358                                                              1000baseT_Half);
 359                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 360                                                              1000baseT_Half);
 361                         fallthrough;
 362                 case SPEED_100:
 363                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 364                                                              100baseT_Full);
 365                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 366                                                              100baseT_Full);
 367                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 368                                                              100baseT_Half);
 369                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 370                                                              100baseT_Half);
 371                         fallthrough;
 372                 case SPEED_10:
 373                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 374                                                              10baseT_Full);
 375                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 376                                                              10baseT_Full);
 377                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 378                                                              10baseT_Half);
 379                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 380                                                              10baseT_Half);
 381                         break;
 382                 default:
 383                         break;
 384                 }
 385
 386                 break;
 387         case PORT_FIBRE:
 388                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
 389                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
 390
 391                 switch (cmd->base.speed) {
 392                 case SPEED_25000:
 393                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 394                                                              25000baseSR_Full);
 395                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 396                                                              25000baseSR_Full);
 397                         break;
 398                 case SPEED_10000:
 399                         if (link_mode == QETH_LINK_MODE_FIBRE_LONG) {
 400                                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 401                                                                      10000baseLR_Full);
 402                                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 403                                                                      10000baseLR_Full);
 404                         } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) {
 405                                 ethtool_link_ksettings_add_link_mode(cmd, supported,
 406                                                                      10000baseSR_Full);
 407                                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
 408                                                                      10000baseSR_Full);
 409                         }
 410                         break;
 411                 case SPEED_1000:
 412                         ethtool_link_ksettings_add_link_mode(cmd, supported,
 413                                                              1000baseX_Full);
 414                         ethtool_link_ksettings_add_link_mode(cmd, advertising,
 415                                                              1000baseX_Full);
 416                         break;
 417                 default:
 418                         break;
 419                 }
 420
 421                 break;
 422         default:
 423                 break;
 424         }
 425 }
 426
 427 static int qeth_get_link_ksettings(struct net_device *netdev,
 428                                    struct ethtool_link_ksettings *cmd)
 429 {
 430         struct qeth_card *card = netdev->ml_priv;
 431
 432         QETH_CARD_TEXT(card, 4, "ethtglks");
 433         cmd->base.speed = card->info.link_info.speed;
 434         cmd->base.duplex = card->info.link_info.duplex;
 435         cmd->base.port = card->info.link_info.port;
 436         cmd->base.autoneg = AUTONEG_ENABLE;
 437         cmd->base.phy_address = 0;
 438         cmd->base.mdio_support = 0;
 439         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
 440         cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
 441
 442         qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode);
 443
 444         return 0;
 445 }
 446
 447 const struct ethtool_ops qeth_ethtool_ops = {
 448         .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
 449                                      ETHTOOL_COALESCE_TX_MAX_FRAMES,
 450         .get_link = ethtool_op_get_link,
 451         .set_coalesce = qeth_set_coalesce,
 452         .get_ringparam = qeth_get_ringparam,
 453         .get_strings = qeth_get_strings,
 454         .get_ethtool_stats = qeth_get_ethtool_stats,
 455         .get_sset_count = qeth_get_sset_count,
 456         .get_drvinfo = qeth_get_drvinfo,
 457         .get_channels = qeth_get_channels,
 458         .set_channels = qeth_set_channels,
 459         .get_ts_info = qeth_get_ts_info,
 460         .get_tunable = qeth_get_tunable,
 461         .set_tunable = qeth_set_tunable,
 462         .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
 463         .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
 464         .get_link_ksettings = qeth_get_link_ksettings,
 465 };