drivers/net/ethernet/cisco/enic/enic_ethtool.c

   1 /**
   2  * Copyright 2013 Cisco Systems, Inc.  All rights reserved.
   3  *
   4  * This program is free software; you may redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15  * SOFTWARE.
  16  *
  17  */
  18
  19 #include <linux/netdevice.h>
  20 #include <linux/ethtool.h>
  21
  22 #include "enic_res.h"
  23 #include "enic.h"
  24 #include "enic_dev.h"
  25 #include "enic_clsf.h"
  26 #include "vnic_rss.h"
  27 #include "vnic_stats.h"
  28
  29 struct enic_stat {
  30         char name[ETH_GSTRING_LEN];
  31         unsigned int index;
  32 };
  33
  34 #define ENIC_TX_STAT(stat) { \
  35         .name = #stat, \
  36         .index = offsetof(struct vnic_tx_stats, stat) / sizeof(u64) \
  37 }
  38
  39 #define ENIC_RX_STAT(stat) { \
  40         .name = #stat, \
  41         .index = offsetof(struct vnic_rx_stats, stat) / sizeof(u64) \
  42 }
  43
  44 #define ENIC_GEN_STAT(stat) { \
  45         .name = #stat, \
  46         .index = offsetof(struct vnic_gen_stats, stat) / sizeof(u64)\
  47 }
  48
  49 static const struct enic_stat enic_tx_stats[] = {
  50         ENIC_TX_STAT(tx_frames_ok),
  51         ENIC_TX_STAT(tx_unicast_frames_ok),
  52         ENIC_TX_STAT(tx_multicast_frames_ok),
  53         ENIC_TX_STAT(tx_broadcast_frames_ok),
  54         ENIC_TX_STAT(tx_bytes_ok),
  55         ENIC_TX_STAT(tx_unicast_bytes_ok),
  56         ENIC_TX_STAT(tx_multicast_bytes_ok),
  57         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  58         ENIC_TX_STAT(tx_drops),
  59         ENIC_TX_STAT(tx_errors),
  60         ENIC_TX_STAT(tx_tso),
  61 };
  62
  63 static const struct enic_stat enic_rx_stats[] = {
  64         ENIC_RX_STAT(rx_frames_ok),
  65         ENIC_RX_STAT(rx_frames_total),
  66         ENIC_RX_STAT(rx_unicast_frames_ok),
  67         ENIC_RX_STAT(rx_multicast_frames_ok),
  68         ENIC_RX_STAT(rx_broadcast_frames_ok),
  69         ENIC_RX_STAT(rx_bytes_ok),
  70         ENIC_RX_STAT(rx_unicast_bytes_ok),
  71         ENIC_RX_STAT(rx_multicast_bytes_ok),
  72         ENIC_RX_STAT(rx_broadcast_bytes_ok),
  73         ENIC_RX_STAT(rx_drop),
  74         ENIC_RX_STAT(rx_no_bufs),
  75         ENIC_RX_STAT(rx_errors),
  76         ENIC_RX_STAT(rx_rss),
  77         ENIC_RX_STAT(rx_crc_errors),
  78         ENIC_RX_STAT(rx_frames_64),
  79         ENIC_RX_STAT(rx_frames_127),
  80         ENIC_RX_STAT(rx_frames_255),
  81         ENIC_RX_STAT(rx_frames_511),
  82         ENIC_RX_STAT(rx_frames_1023),
  83         ENIC_RX_STAT(rx_frames_1518),
  84         ENIC_RX_STAT(rx_frames_to_max),
  85 };
  86
  87 static const struct enic_stat enic_gen_stats[] = {
  88         ENIC_GEN_STAT(dma_map_error),
  89 };
  90
  91 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
  92 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
  93 static const unsigned int enic_n_gen_stats = ARRAY_SIZE(enic_gen_stats);
  94
  95 static void enic_intr_coal_set_rx(struct enic *enic, u32 timer)
  96 {
  97         int i;
  98         int intr;
  99
 100         for (i = 0; i < enic->rq_count; i++) {
 101                 intr = enic_msix_rq_intr(enic, i);
 102                 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
 103         }
 104 }
 105
 106 static int enic_get_settings(struct net_device *netdev,
 107         struct ethtool_cmd *ecmd)
 108 {
 109         struct enic *enic = netdev_priv(netdev);
 110
 111         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 112         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 113         ecmd->port = PORT_FIBRE;
 114         ecmd->transceiver = XCVR_EXTERNAL;
 115
 116         if (netif_carrier_ok(netdev)) {
 117                 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
 118                 ecmd->duplex = DUPLEX_FULL;
 119         } else {
 120                 ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
 121                 ecmd->duplex = DUPLEX_UNKNOWN;
 122         }
 123
 124         ecmd->autoneg = AUTONEG_DISABLE;
 125
 126         return 0;
 127 }
 128
 129 static void enic_get_drvinfo(struct net_device *netdev,
 130         struct ethtool_drvinfo *drvinfo)
 131 {
 132         struct enic *enic = netdev_priv(netdev);
 133         struct vnic_devcmd_fw_info *fw_info;
 134         int err;
 135
 136         err = enic_dev_fw_info(enic, &fw_info);
 137         /* return only when pci_zalloc_consistent fails in vnic_dev_fw_info
 138          * For other failures, like devcmd failure, we return previously
 139          * recorded info.
 140          */
 141         if (err == -ENOMEM)
 142                 return;
 143
 144         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 145         strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 146         strlcpy(drvinfo->fw_version, fw_info->fw_version,
 147                 sizeof(drvinfo->fw_version));
 148         strlcpy(drvinfo->bus_info, pci_name(enic->pdev),
 149                 sizeof(drvinfo->bus_info));
 150 }
 151
 152 static void enic_get_strings(struct net_device *netdev, u32 stringset,
 153         u8 *data)
 154 {
 155         unsigned int i;
 156
 157         switch (stringset) {
 158         case ETH_SS_STATS:
 159                 for (i = 0; i < enic_n_tx_stats; i++) {
 160                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 161                         data += ETH_GSTRING_LEN;
 162                 }
 163                 for (i = 0; i < enic_n_rx_stats; i++) {
 164                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 165                         data += ETH_GSTRING_LEN;
 166                 }
 167                 for (i = 0; i < enic_n_gen_stats; i++) {
 168                         memcpy(data, enic_gen_stats[i].name, ETH_GSTRING_LEN);
 169                         data += ETH_GSTRING_LEN;
 170                 }
 171                 break;
 172         }
 173 }
 174
 175 static int enic_get_sset_count(struct net_device *netdev, int sset)
 176 {
 177         switch (sset) {
 178         case ETH_SS_STATS:
 179                 return enic_n_tx_stats + enic_n_rx_stats + enic_n_gen_stats;
 180         default:
 181                 return -EOPNOTSUPP;
 182         }
 183 }
 184
 185 static void enic_get_ethtool_stats(struct net_device *netdev,
 186         struct ethtool_stats *stats, u64 *data)
 187 {
 188         struct enic *enic = netdev_priv(netdev);
 189         struct vnic_stats *vstats;
 190         unsigned int i;
 191         int err;
 192
 193         err = enic_dev_stats_dump(enic, &vstats);
 194         /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump
 195          * For other failures, like devcmd failure, we return previously
 196          * recorded stats.
 197          */
 198         if (err == -ENOMEM)
 199                 return;
 200
 201         for (i = 0; i < enic_n_tx_stats; i++)
 202                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].index];
 203         for (i = 0; i < enic_n_rx_stats; i++)
 204                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].index];
 205         for (i = 0; i < enic_n_gen_stats; i++)
 206                 *(data++) = ((u64 *)&enic->gen_stats)[enic_gen_stats[i].index];
 207 }
 208
 209 static u32 enic_get_msglevel(struct net_device *netdev)
 210 {
 211         struct enic *enic = netdev_priv(netdev);
 212         return enic->msg_enable;
 213 }
 214
 215 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 216 {
 217         struct enic *enic = netdev_priv(netdev);
 218         enic->msg_enable = value;
 219 }
 220
 221 static int enic_get_coalesce(struct net_device *netdev,
 222         struct ethtool_coalesce *ecmd)
 223 {
 224         struct enic *enic = netdev_priv(netdev);
 225         struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
 226
 227         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 228         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 229         if (rxcoal->use_adaptive_rx_coalesce)
 230                 ecmd->use_adaptive_rx_coalesce = 1;
 231         ecmd->rx_coalesce_usecs_low = rxcoal->small_pkt_range_start;
 232         ecmd->rx_coalesce_usecs_high = rxcoal->range_end;
 233
 234         return 0;
 235 }
 236
 237 static int enic_set_coalesce(struct net_device *netdev,
 238         struct ethtool_coalesce *ecmd)
 239 {
 240         struct enic *enic = netdev_priv(netdev);
 241         u32 tx_coalesce_usecs;
 242         u32 rx_coalesce_usecs;
 243         u32 rx_coalesce_usecs_low;
 244         u32 rx_coalesce_usecs_high;
 245         u32 coalesce_usecs_max;
 246         unsigned int i, intr;
 247         struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
 248
 249         coalesce_usecs_max = vnic_dev_get_intr_coal_timer_max(enic->vdev);
 250         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 251                                   coalesce_usecs_max);
 252         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 253                                   coalesce_usecs_max);
 254
 255         rx_coalesce_usecs_low = min_t(u32, ecmd->rx_coalesce_usecs_low,
 256                                       coalesce_usecs_max);
 257         rx_coalesce_usecs_high = min_t(u32, ecmd->rx_coalesce_usecs_high,
 258                                        coalesce_usecs_max);
 259
 260         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 261         case VNIC_DEV_INTR_MODE_INTX:
 262                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 263                         return -EINVAL;
 264                 if (ecmd->use_adaptive_rx_coalesce      ||
 265                     ecmd->rx_coalesce_usecs_low         ||
 266                     ecmd->rx_coalesce_usecs_high)
 267                         return -EINVAL;
 268
 269                 intr = enic_legacy_io_intr();
 270                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 271                         tx_coalesce_usecs);
 272                 break;
 273         case VNIC_DEV_INTR_MODE_MSI:
 274                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 275                         return -EINVAL;
 276                 if (ecmd->use_adaptive_rx_coalesce      ||
 277                     ecmd->rx_coalesce_usecs_low         ||
 278                     ecmd->rx_coalesce_usecs_high)
 279                         return -EINVAL;
 280
 281                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 282                         tx_coalesce_usecs);
 283                 break;
 284         case VNIC_DEV_INTR_MODE_MSIX:
 285                 if (ecmd->rx_coalesce_usecs_high &&
 286                     (rx_coalesce_usecs_high <
 287                      rx_coalesce_usecs_low + ENIC_AIC_LARGE_PKT_DIFF))
 288                                 return -EINVAL;
 289
 290                 for (i = 0; i < enic->wq_count; i++) {
 291                         intr = enic_msix_wq_intr(enic, i);
 292                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 293                                 tx_coalesce_usecs);
 294                 }
 295
 296                 rxcoal->use_adaptive_rx_coalesce =
 297                                         !!ecmd->use_adaptive_rx_coalesce;
 298                 if (!rxcoal->use_adaptive_rx_coalesce)
 299                         enic_intr_coal_set_rx(enic, rx_coalesce_usecs);
 300
 301                 if (ecmd->rx_coalesce_usecs_high) {
 302                         rxcoal->range_end = rx_coalesce_usecs_high;
 303                         rxcoal->small_pkt_range_start = rx_coalesce_usecs_low;
 304                         rxcoal->large_pkt_range_start = rx_coalesce_usecs_low +
 305                                                         ENIC_AIC_LARGE_PKT_DIFF;
 306                 }
 307                 break;
 308         default:
 309                 break;
 310         }
 311
 312         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 313         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 314
 315         return 0;
 316 }
 317
 318 static int enic_grxclsrlall(struct enic *enic, struct ethtool_rxnfc *cmd,
 319                             u32 *rule_locs)
 320 {
 321         int j, ret = 0, cnt = 0;
 322
 323         cmd->data = enic->rfs_h.max - enic->rfs_h.free;
 324         for (j = 0; j < (1 << ENIC_RFS_FLW_BITSHIFT); j++) {
 325                 struct hlist_head *hhead;
 326                 struct hlist_node *tmp;
 327                 struct enic_rfs_fltr_node *n;
 328
 329                 hhead = &enic->rfs_h.ht_head[j];
 330                 hlist_for_each_entry_safe(n, tmp, hhead, node) {
 331                         if (cnt == cmd->rule_cnt)
 332                                 return -EMSGSIZE;
 333                         rule_locs[cnt] = n->fltr_id;
 334                         cnt++;
 335                 }
 336         }
 337         cmd->rule_cnt = cnt;
 338
 339         return ret;
 340 }
 341
 342 static int enic_grxclsrule(struct enic *enic, struct ethtool_rxnfc *cmd)
 343 {
 344         struct ethtool_rx_flow_spec *fsp =
 345                                 (struct ethtool_rx_flow_spec *)&cmd->fs;
 346         struct enic_rfs_fltr_node *n;
 347
 348         n = htbl_fltr_search(enic, (u16)fsp->location);
 349         if (!n)
 350                 return -EINVAL;
 351         switch (n->keys.ip_proto) {
 352         case IPPROTO_TCP:
 353                 fsp->flow_type = TCP_V4_FLOW;
 354                 break;
 355         case IPPROTO_UDP:
 356                 fsp->flow_type = UDP_V4_FLOW;
 357                 break;
 358         default:
 359                 return -EINVAL;
 360                 break;
 361         }
 362
 363         fsp->h_u.tcp_ip4_spec.ip4src = n->keys.src;
 364         fsp->m_u.tcp_ip4_spec.ip4src = (__u32)~0;
 365
 366         fsp->h_u.tcp_ip4_spec.ip4dst = n->keys.dst;
 367         fsp->m_u.tcp_ip4_spec.ip4dst = (__u32)~0;
 368
 369         fsp->h_u.tcp_ip4_spec.psrc = n->keys.port16[0];
 370         fsp->m_u.tcp_ip4_spec.psrc = (__u16)~0;
 371
 372         fsp->h_u.tcp_ip4_spec.pdst = n->keys.port16[1];
 373         fsp->m_u.tcp_ip4_spec.pdst = (__u16)~0;
 374
 375         fsp->ring_cookie = n->rq_id;
 376
 377         return 0;
 378 }
 379
 380 static int enic_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
 381                           u32 *rule_locs)
 382 {
 383         struct enic *enic = netdev_priv(dev);
 384         int ret = 0;
 385
 386         switch (cmd->cmd) {
 387         case ETHTOOL_GRXRINGS:
 388                 cmd->data = enic->rq_count;
 389                 break;
 390         case ETHTOOL_GRXCLSRLCNT:
 391                 spin_lock_bh(&enic->rfs_h.lock);
 392                 cmd->rule_cnt = enic->rfs_h.max - enic->rfs_h.free;
 393                 cmd->data = enic->rfs_h.max;
 394                 spin_unlock_bh(&enic->rfs_h.lock);
 395                 break;
 396         case ETHTOOL_GRXCLSRLALL:
 397                 spin_lock_bh(&enic->rfs_h.lock);
 398                 ret = enic_grxclsrlall(enic, cmd, rule_locs);
 399                 spin_unlock_bh(&enic->rfs_h.lock);
 400                 break;
 401         case ETHTOOL_GRXCLSRULE:
 402                 spin_lock_bh(&enic->rfs_h.lock);
 403                 ret = enic_grxclsrule(enic, cmd);
 404                 spin_unlock_bh(&enic->rfs_h.lock);
 405                 break;
 406         default:
 407                 ret = -EOPNOTSUPP;
 408                 break;
 409         }
 410
 411         return ret;
 412 }
 413
 414 static int enic_get_tunable(struct net_device *dev,
 415                             const struct ethtool_tunable *tuna, void *data)
 416 {
 417         struct enic *enic = netdev_priv(dev);
 418         int ret = 0;
 419
 420         switch (tuna->id) {
 421         case ETHTOOL_RX_COPYBREAK:
 422                 *(u32 *)data = enic->rx_copybreak;
 423                 break;
 424         default:
 425                 ret = -EINVAL;
 426                 break;
 427         }
 428
 429         return ret;
 430 }
 431
 432 static int enic_set_tunable(struct net_device *dev,
 433                             const struct ethtool_tunable *tuna,
 434                             const void *data)
 435 {
 436         struct enic *enic = netdev_priv(dev);
 437         int ret = 0;
 438
 439         switch (tuna->id) {
 440         case ETHTOOL_RX_COPYBREAK:
 441                 enic->rx_copybreak = *(u32 *)data;
 442                 break;
 443         default:
 444                 ret = -EINVAL;
 445                 break;
 446         }
 447
 448         return ret;
 449 }
 450
 451 static u32 enic_get_rxfh_key_size(struct net_device *netdev)
 452 {
 453         return ENIC_RSS_LEN;
 454 }
 455
 456 static int enic_get_rxfh(struct net_device *netdev, u32 *indir, u8 *hkey,
 457                          u8 *hfunc)
 458 {
 459         struct enic *enic = netdev_priv(netdev);
 460
 461         if (hkey)
 462                 memcpy(hkey, enic->rss_key, ENIC_RSS_LEN);
 463
 464         if (hfunc)
 465                 *hfunc = ETH_RSS_HASH_TOP;
 466
 467         return 0;
 468 }
 469
 470 static int enic_set_rxfh(struct net_device *netdev, const u32 *indir,
 471                          const u8 *hkey, const u8 hfunc)
 472 {
 473         struct enic *enic = netdev_priv(netdev);
 474
 475         if ((hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) ||
 476             indir)
 477                 return -EINVAL;
 478
 479         if (hkey)
 480                 memcpy(enic->rss_key, hkey, ENIC_RSS_LEN);
 481
 482         return __enic_set_rsskey(enic);
 483 }
 484
 485 static const struct ethtool_ops enic_ethtool_ops = {
 486         .get_settings = enic_get_settings,
 487         .get_drvinfo = enic_get_drvinfo,
 488         .get_msglevel = enic_get_msglevel,
 489         .set_msglevel = enic_set_msglevel,
 490         .get_link = ethtool_op_get_link,
 491         .get_strings = enic_get_strings,
 492         .get_sset_count = enic_get_sset_count,
 493         .get_ethtool_stats = enic_get_ethtool_stats,
 494         .get_coalesce = enic_get_coalesce,
 495         .set_coalesce = enic_set_coalesce,
 496         .get_rxnfc = enic_get_rxnfc,
 497         .get_tunable = enic_get_tunable,
 498         .set_tunable = enic_set_tunable,
 499         .get_rxfh_key_size = enic_get_rxfh_key_size,
 500         .get_rxfh = enic_get_rxfh,
 501         .set_rxfh = enic_set_rxfh,
 502 };
 503
 504 void enic_set_ethtool_ops(struct net_device *netdev)
 505 {
 506         netdev->ethtool_ops = &enic_ethtool_ops;
 507 }