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_ksettings(struct net_device *netdev,
 107                               struct ethtool_link_ksettings *ecmd)
 108 {
 109         struct enic *enic = netdev_priv(netdev);
 110         struct ethtool_link_settings *base = &ecmd->base;
 111
 112         ethtool_link_ksettings_add_link_mode(ecmd, supported,
 113                                              10000baseT_Full);
 114         ethtool_link_ksettings_add_link_mode(ecmd, supported, FIBRE);
 115         ethtool_link_ksettings_add_link_mode(ecmd, advertising,
 116                                              10000baseT_Full);
 117         ethtool_link_ksettings_add_link_mode(ecmd, advertising, FIBRE);
 118         base->port = PORT_FIBRE;
 119
 120         if (netif_carrier_ok(netdev)) {
 121                 base->speed = vnic_dev_port_speed(enic->vdev);
 122                 base->duplex = DUPLEX_FULL;
 123         } else {
 124                 base->speed = SPEED_UNKNOWN;
 125                 base->duplex = DUPLEX_UNKNOWN;
 126         }
 127
 128         base->autoneg = AUTONEG_DISABLE;
 129
 130         return 0;
 131 }
 132
 133 static void enic_get_drvinfo(struct net_device *netdev,
 134         struct ethtool_drvinfo *drvinfo)
 135 {
 136         struct enic *enic = netdev_priv(netdev);
 137         struct vnic_devcmd_fw_info *fw_info;
 138         int err;
 139
 140         err = enic_dev_fw_info(enic, &fw_info);
 141         /* return only when pci_zalloc_consistent fails in vnic_dev_fw_info
 142          * For other failures, like devcmd failure, we return previously
 143          * recorded info.
 144          */
 145         if (err == -ENOMEM)
 146                 return;
 147
 148         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 149         strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 150         strlcpy(drvinfo->fw_version, fw_info->fw_version,
 151                 sizeof(drvinfo->fw_version));
 152         strlcpy(drvinfo->bus_info, pci_name(enic->pdev),
 153                 sizeof(drvinfo->bus_info));
 154 }
 155
 156 static void enic_get_strings(struct net_device *netdev, u32 stringset,
 157         u8 *data)
 158 {
 159         unsigned int i;
 160
 161         switch (stringset) {
 162         case ETH_SS_STATS:
 163                 for (i = 0; i < enic_n_tx_stats; i++) {
 164                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 165                         data += ETH_GSTRING_LEN;
 166                 }
 167                 for (i = 0; i < enic_n_rx_stats; i++) {
 168                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 169                         data += ETH_GSTRING_LEN;
 170                 }
 171                 for (i = 0; i < enic_n_gen_stats; i++) {
 172                         memcpy(data, enic_gen_stats[i].name, ETH_GSTRING_LEN);
 173                         data += ETH_GSTRING_LEN;
 174                 }
 175                 break;
 176         }
 177 }
 178
 179 static int enic_get_sset_count(struct net_device *netdev, int sset)
 180 {
 181         switch (sset) {
 182         case ETH_SS_STATS:
 183                 return enic_n_tx_stats + enic_n_rx_stats + enic_n_gen_stats;
 184         default:
 185                 return -EOPNOTSUPP;
 186         }
 187 }
 188
 189 static void enic_get_ethtool_stats(struct net_device *netdev,
 190         struct ethtool_stats *stats, u64 *data)
 191 {
 192         struct enic *enic = netdev_priv(netdev);
 193         struct vnic_stats *vstats;
 194         unsigned int i;
 195         int err;
 196
 197         err = enic_dev_stats_dump(enic, &vstats);
 198         /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump
 199          * For other failures, like devcmd failure, we return previously
 200          * recorded stats.
 201          */
 202         if (err == -ENOMEM)
 203                 return;
 204
 205         for (i = 0; i < enic_n_tx_stats; i++)
 206                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].index];
 207         for (i = 0; i < enic_n_rx_stats; i++)
 208                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].index];
 209         for (i = 0; i < enic_n_gen_stats; i++)
 210                 *(data++) = ((u64 *)&enic->gen_stats)[enic_gen_stats[i].index];
 211 }
 212
 213 static u32 enic_get_msglevel(struct net_device *netdev)
 214 {
 215         struct enic *enic = netdev_priv(netdev);
 216         return enic->msg_enable;
 217 }
 218
 219 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 220 {
 221         struct enic *enic = netdev_priv(netdev);
 222         enic->msg_enable = value;
 223 }
 224
 225 static int enic_get_coalesce(struct net_device *netdev,
 226         struct ethtool_coalesce *ecmd)
 227 {
 228         struct enic *enic = netdev_priv(netdev);
 229         struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
 230
 231         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
 232                 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 233         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 234         if (rxcoal->use_adaptive_rx_coalesce)
 235                 ecmd->use_adaptive_rx_coalesce = 1;
 236         ecmd->rx_coalesce_usecs_low = rxcoal->small_pkt_range_start;
 237         ecmd->rx_coalesce_usecs_high = rxcoal->range_end;
 238
 239         return 0;
 240 }
 241
 242 static int enic_coalesce_valid(struct enic *enic,
 243                                struct ethtool_coalesce *ec)
 244 {
 245         u32 coalesce_usecs_max = vnic_dev_get_intr_coal_timer_max(enic->vdev);
 246         u32 rx_coalesce_usecs_high = min_t(u32, coalesce_usecs_max,
 247                                            ec->rx_coalesce_usecs_high);
 248         u32 rx_coalesce_usecs_low = min_t(u32, coalesce_usecs_max,
 249                                           ec->rx_coalesce_usecs_low);
 250
 251         if (ec->rx_max_coalesced_frames         ||
 252             ec->rx_coalesce_usecs_irq           ||
 253             ec->rx_max_coalesced_frames_irq     ||
 254             ec->tx_max_coalesced_frames         ||
 255             ec->tx_coalesce_usecs_irq           ||
 256             ec->tx_max_coalesced_frames_irq     ||
 257             ec->stats_block_coalesce_usecs      ||
 258             ec->use_adaptive_tx_coalesce        ||
 259             ec->pkt_rate_low                    ||
 260             ec->rx_max_coalesced_frames_low     ||
 261             ec->tx_coalesce_usecs_low           ||
 262             ec->tx_max_coalesced_frames_low     ||
 263             ec->pkt_rate_high                   ||
 264             ec->rx_max_coalesced_frames_high    ||
 265             ec->tx_coalesce_usecs_high          ||
 266             ec->tx_max_coalesced_frames_high    ||
 267             ec->rate_sample_interval)
 268                 return -EINVAL;
 269
 270         if ((vnic_dev_get_intr_mode(enic->vdev) != VNIC_DEV_INTR_MODE_MSIX) &&
 271             ec->tx_coalesce_usecs)
 272                 return -EINVAL;
 273
 274         if ((ec->tx_coalesce_usecs > coalesce_usecs_max)        ||
 275             (ec->rx_coalesce_usecs > coalesce_usecs_max)        ||
 276             (ec->rx_coalesce_usecs_low > coalesce_usecs_max)    ||
 277             (ec->rx_coalesce_usecs_high > coalesce_usecs_max))
 278                 netdev_info(enic->netdev, "ethtool_set_coalesce: adaptor supports max coalesce value of %d. Setting max value.\n",
 279                             coalesce_usecs_max);
 280
 281         if (ec->rx_coalesce_usecs_high &&
 282             (rx_coalesce_usecs_high <
 283              rx_coalesce_usecs_low + ENIC_AIC_LARGE_PKT_DIFF))
 284                 return -EINVAL;
 285
 286         return 0;
 287 }
 288
 289 static int enic_set_coalesce(struct net_device *netdev,
 290         struct ethtool_coalesce *ecmd)
 291 {
 292         struct enic *enic = netdev_priv(netdev);
 293         u32 tx_coalesce_usecs;
 294         u32 rx_coalesce_usecs;
 295         u32 rx_coalesce_usecs_low;
 296         u32 rx_coalesce_usecs_high;
 297         u32 coalesce_usecs_max;
 298         unsigned int i, intr;
 299         int ret;
 300         struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
 301
 302         ret = enic_coalesce_valid(enic, ecmd);
 303         if (ret)
 304                 return ret;
 305         coalesce_usecs_max = vnic_dev_get_intr_coal_timer_max(enic->vdev);
 306         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 307                                   coalesce_usecs_max);
 308         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 309                                   coalesce_usecs_max);
 310
 311         rx_coalesce_usecs_low = min_t(u32, ecmd->rx_coalesce_usecs_low,
 312                                       coalesce_usecs_max);
 313         rx_coalesce_usecs_high = min_t(u32, ecmd->rx_coalesce_usecs_high,
 314                                        coalesce_usecs_max);
 315
 316         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
 317                 for (i = 0; i < enic->wq_count; i++) {
 318                         intr = enic_msix_wq_intr(enic, i);
 319                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 320                                                        tx_coalesce_usecs);
 321                 }
 322                 enic->tx_coalesce_usecs = tx_coalesce_usecs;
 323         }
 324         rxcoal->use_adaptive_rx_coalesce = !!ecmd->use_adaptive_rx_coalesce;
 325         if (!rxcoal->use_adaptive_rx_coalesce)
 326                 enic_intr_coal_set_rx(enic, rx_coalesce_usecs);
 327         if (ecmd->rx_coalesce_usecs_high) {
 328                 rxcoal->range_end = rx_coalesce_usecs_high;
 329                 rxcoal->small_pkt_range_start = rx_coalesce_usecs_low;
 330                 rxcoal->large_pkt_range_start = rx_coalesce_usecs_low +
 331                                                 ENIC_AIC_LARGE_PKT_DIFF;
 332         }
 333
 334         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 335
 336         return 0;
 337 }
 338
 339 static int enic_grxclsrlall(struct enic *enic, struct ethtool_rxnfc *cmd,
 340                             u32 *rule_locs)
 341 {
 342         int j, ret = 0, cnt = 0;
 343
 344         cmd->data = enic->rfs_h.max - enic->rfs_h.free;
 345         for (j = 0; j < (1 << ENIC_RFS_FLW_BITSHIFT); j++) {
 346                 struct hlist_head *hhead;
 347                 struct hlist_node *tmp;
 348                 struct enic_rfs_fltr_node *n;
 349
 350                 hhead = &enic->rfs_h.ht_head[j];
 351                 hlist_for_each_entry_safe(n, tmp, hhead, node) {
 352                         if (cnt == cmd->rule_cnt)
 353                                 return -EMSGSIZE;
 354                         rule_locs[cnt] = n->fltr_id;
 355                         cnt++;
 356                 }
 357         }
 358         cmd->rule_cnt = cnt;
 359
 360         return ret;
 361 }
 362
 363 static int enic_grxclsrule(struct enic *enic, struct ethtool_rxnfc *cmd)
 364 {
 365         struct ethtool_rx_flow_spec *fsp =
 366                                 (struct ethtool_rx_flow_spec *)&cmd->fs;
 367         struct enic_rfs_fltr_node *n;
 368
 369         n = htbl_fltr_search(enic, (u16)fsp->location);
 370         if (!n)
 371                 return -EINVAL;
 372         switch (n->keys.basic.ip_proto) {
 373         case IPPROTO_TCP:
 374                 fsp->flow_type = TCP_V4_FLOW;
 375                 break;
 376         case IPPROTO_UDP:
 377                 fsp->flow_type = UDP_V4_FLOW;
 378                 break;
 379         default:
 380                 return -EINVAL;
 381                 break;
 382         }
 383
 384         fsp->h_u.tcp_ip4_spec.ip4src = flow_get_u32_src(&n->keys);
 385         fsp->m_u.tcp_ip4_spec.ip4src = (__u32)~0;
 386
 387         fsp->h_u.tcp_ip4_spec.ip4dst = flow_get_u32_dst(&n->keys);
 388         fsp->m_u.tcp_ip4_spec.ip4dst = (__u32)~0;
 389
 390         fsp->h_u.tcp_ip4_spec.psrc = n->keys.ports.src;
 391         fsp->m_u.tcp_ip4_spec.psrc = (__u16)~0;
 392
 393         fsp->h_u.tcp_ip4_spec.pdst = n->keys.ports.dst;
 394         fsp->m_u.tcp_ip4_spec.pdst = (__u16)~0;
 395
 396         fsp->ring_cookie = n->rq_id;
 397
 398         return 0;
 399 }
 400
 401 static int enic_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
 402                           u32 *rule_locs)
 403 {
 404         struct enic *enic = netdev_priv(dev);
 405         int ret = 0;
 406
 407         switch (cmd->cmd) {
 408         case ETHTOOL_GRXRINGS:
 409                 cmd->data = enic->rq_count;
 410                 break;
 411         case ETHTOOL_GRXCLSRLCNT:
 412                 spin_lock_bh(&enic->rfs_h.lock);
 413                 cmd->rule_cnt = enic->rfs_h.max - enic->rfs_h.free;
 414                 cmd->data = enic->rfs_h.max;
 415                 spin_unlock_bh(&enic->rfs_h.lock);
 416                 break;
 417         case ETHTOOL_GRXCLSRLALL:
 418                 spin_lock_bh(&enic->rfs_h.lock);
 419                 ret = enic_grxclsrlall(enic, cmd, rule_locs);
 420                 spin_unlock_bh(&enic->rfs_h.lock);
 421                 break;
 422         case ETHTOOL_GRXCLSRULE:
 423                 spin_lock_bh(&enic->rfs_h.lock);
 424                 ret = enic_grxclsrule(enic, cmd);
 425                 spin_unlock_bh(&enic->rfs_h.lock);
 426                 break;
 427         default:
 428                 ret = -EOPNOTSUPP;
 429                 break;
 430         }
 431
 432         return ret;
 433 }
 434
 435 static int enic_get_tunable(struct net_device *dev,
 436                             const struct ethtool_tunable *tuna, void *data)
 437 {
 438         struct enic *enic = netdev_priv(dev);
 439         int ret = 0;
 440
 441         switch (tuna->id) {
 442         case ETHTOOL_RX_COPYBREAK:
 443                 *(u32 *)data = enic->rx_copybreak;
 444                 break;
 445         default:
 446                 ret = -EINVAL;
 447                 break;
 448         }
 449
 450         return ret;
 451 }
 452
 453 static int enic_set_tunable(struct net_device *dev,
 454                             const struct ethtool_tunable *tuna,
 455                             const void *data)
 456 {
 457         struct enic *enic = netdev_priv(dev);
 458         int ret = 0;
 459
 460         switch (tuna->id) {
 461         case ETHTOOL_RX_COPYBREAK:
 462                 enic->rx_copybreak = *(u32 *)data;
 463                 break;
 464         default:
 465                 ret = -EINVAL;
 466                 break;
 467         }
 468
 469         return ret;
 470 }
 471
 472 static u32 enic_get_rxfh_key_size(struct net_device *netdev)
 473 {
 474         return ENIC_RSS_LEN;
 475 }
 476
 477 static int enic_get_rxfh(struct net_device *netdev, u32 *indir, u8 *hkey,
 478                          u8 *hfunc)
 479 {
 480         struct enic *enic = netdev_priv(netdev);
 481
 482         if (hkey)
 483                 memcpy(hkey, enic->rss_key, ENIC_RSS_LEN);
 484
 485         if (hfunc)
 486                 *hfunc = ETH_RSS_HASH_TOP;
 487
 488         return 0;
 489 }
 490
 491 static int enic_set_rxfh(struct net_device *netdev, const u32 *indir,
 492                          const u8 *hkey, const u8 hfunc)
 493 {
 494         struct enic *enic = netdev_priv(netdev);
 495
 496         if ((hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) ||
 497             indir)
 498                 return -EINVAL;
 499
 500         if (hkey)
 501                 memcpy(enic->rss_key, hkey, ENIC_RSS_LEN);
 502
 503         return __enic_set_rsskey(enic);
 504 }
 505
 506 static const struct ethtool_ops enic_ethtool_ops = {
 507         .get_drvinfo = enic_get_drvinfo,
 508         .get_msglevel = enic_get_msglevel,
 509         .set_msglevel = enic_set_msglevel,
 510         .get_link = ethtool_op_get_link,
 511         .get_strings = enic_get_strings,
 512         .get_sset_count = enic_get_sset_count,
 513         .get_ethtool_stats = enic_get_ethtool_stats,
 514         .get_coalesce = enic_get_coalesce,
 515         .set_coalesce = enic_set_coalesce,
 516         .get_rxnfc = enic_get_rxnfc,
 517         .get_tunable = enic_get_tunable,
 518         .set_tunable = enic_set_tunable,
 519         .get_rxfh_key_size = enic_get_rxfh_key_size,
 520         .get_rxfh = enic_get_rxfh,
 521         .set_rxfh = enic_set_rxfh,
 522         .get_link_ksettings = enic_get_ksettings,
 523 };
 524
 525 void enic_set_ethtool_ops(struct net_device *netdev)
 526 {
 527         netdev->ethtool_ops = &enic_ethtool_ops;
 528 }