kernel/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         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
 228                 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 229         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 230         if (rxcoal->use_adaptive_rx_coalesce)
 231                 ecmd->use_adaptive_rx_coalesce = 1;
 232         ecmd->rx_coalesce_usecs_low = rxcoal->small_pkt_range_start;
 233         ecmd->rx_coalesce_usecs_high = rxcoal->range_end;
 234
 235         return 0;
 236 }
 237
 238 static int enic_coalesce_valid(struct enic *enic,
 239                                struct ethtool_coalesce *ec)
 240 {
 241         u32 coalesce_usecs_max = vnic_dev_get_intr_coal_timer_max(enic->vdev);
 242         u32 rx_coalesce_usecs_high = min_t(u32, coalesce_usecs_max,
 243                                            ec->rx_coalesce_usecs_high);
 244         u32 rx_coalesce_usecs_low = min_t(u32, coalesce_usecs_max,
 245                                           ec->rx_coalesce_usecs_low);
 246
 247         if (ec->rx_max_coalesced_frames         ||
 248             ec->rx_coalesce_usecs_irq           ||
 249             ec->rx_max_coalesced_frames_irq     ||
 250             ec->tx_max_coalesced_frames         ||
 251             ec->tx_coalesce_usecs_irq           ||
 252             ec->tx_max_coalesced_frames_irq     ||
 253             ec->stats_block_coalesce_usecs      ||
 254             ec->use_adaptive_tx_coalesce        ||
 255             ec->pkt_rate_low                    ||
 256             ec->rx_max_coalesced_frames_low     ||
 257             ec->tx_coalesce_usecs_low           ||
 258             ec->tx_max_coalesced_frames_low     ||
 259             ec->pkt_rate_high                   ||
 260             ec->rx_max_coalesced_frames_high    ||
 261             ec->tx_coalesce_usecs_high          ||
 262             ec->tx_max_coalesced_frames_high    ||
 263             ec->rate_sample_interval)
 264                 return -EINVAL;
 265
 266         if ((vnic_dev_get_intr_mode(enic->vdev) != VNIC_DEV_INTR_MODE_MSIX) &&
 267             ec->tx_coalesce_usecs)
 268                 return -EINVAL;
 269
 270         if ((ec->tx_coalesce_usecs > coalesce_usecs_max)        ||
 271             (ec->rx_coalesce_usecs > coalesce_usecs_max)        ||
 272             (ec->rx_coalesce_usecs_low > coalesce_usecs_max)    ||
 273             (ec->rx_coalesce_usecs_high > coalesce_usecs_max))
 274                 netdev_info(enic->netdev, "ethtool_set_coalesce: adaptor supports max coalesce value of %d. Setting max value.\n",
 275                             coalesce_usecs_max);
 276
 277         if (ec->rx_coalesce_usecs_high &&
 278             (rx_coalesce_usecs_high <
 279              rx_coalesce_usecs_low + ENIC_AIC_LARGE_PKT_DIFF))
 280                 return -EINVAL;
 281
 282         return 0;
 283 }
 284
 285 static int enic_set_coalesce(struct net_device *netdev,
 286         struct ethtool_coalesce *ecmd)
 287 {
 288         struct enic *enic = netdev_priv(netdev);
 289         u32 tx_coalesce_usecs;
 290         u32 rx_coalesce_usecs;
 291         u32 rx_coalesce_usecs_low;
 292         u32 rx_coalesce_usecs_high;
 293         u32 coalesce_usecs_max;
 294         unsigned int i, intr;
 295         int ret;
 296         struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
 297
 298         ret = enic_coalesce_valid(enic, ecmd);
 299         if (ret)
 300                 return ret;
 301         coalesce_usecs_max = vnic_dev_get_intr_coal_timer_max(enic->vdev);
 302         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 303                                   coalesce_usecs_max);
 304         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 305                                   coalesce_usecs_max);
 306
 307         rx_coalesce_usecs_low = min_t(u32, ecmd->rx_coalesce_usecs_low,
 308                                       coalesce_usecs_max);
 309         rx_coalesce_usecs_high = min_t(u32, ecmd->rx_coalesce_usecs_high,
 310                                        coalesce_usecs_max);
 311
 312         if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
 313                 for (i = 0; i < enic->wq_count; i++) {
 314                         intr = enic_msix_wq_intr(enic, i);
 315                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 316                                                        tx_coalesce_usecs);
 317                 }
 318                 enic->tx_coalesce_usecs = tx_coalesce_usecs;
 319         }
 320         rxcoal->use_adaptive_rx_coalesce = !!ecmd->use_adaptive_rx_coalesce;
 321         if (!rxcoal->use_adaptive_rx_coalesce)
 322                 enic_intr_coal_set_rx(enic, rx_coalesce_usecs);
 323         if (ecmd->rx_coalesce_usecs_high) {
 324                 rxcoal->range_end = rx_coalesce_usecs_high;
 325                 rxcoal->small_pkt_range_start = rx_coalesce_usecs_low;
 326                 rxcoal->large_pkt_range_start = rx_coalesce_usecs_low +
 327                                                 ENIC_AIC_LARGE_PKT_DIFF;
 328         }
 329
 330         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 331
 332         return 0;
 333 }
 334
 335 static int enic_grxclsrlall(struct enic *enic, struct ethtool_rxnfc *cmd,
 336                             u32 *rule_locs)
 337 {
 338         int j, ret = 0, cnt = 0;
 339
 340         cmd->data = enic->rfs_h.max - enic->rfs_h.free;
 341         for (j = 0; j < (1 << ENIC_RFS_FLW_BITSHIFT); j++) {
 342                 struct hlist_head *hhead;
 343                 struct hlist_node *tmp;
 344                 struct enic_rfs_fltr_node *n;
 345
 346                 hhead = &enic->rfs_h.ht_head[j];
 347                 hlist_for_each_entry_safe(n, tmp, hhead, node) {
 348                         if (cnt == cmd->rule_cnt)
 349                                 return -EMSGSIZE;
 350                         rule_locs[cnt] = n->fltr_id;
 351                         cnt++;
 352                 }
 353         }
 354         cmd->rule_cnt = cnt;
 355
 356         return ret;
 357 }
 358
 359 static int enic_grxclsrule(struct enic *enic, struct ethtool_rxnfc *cmd)
 360 {
 361         struct ethtool_rx_flow_spec *fsp =
 362                                 (struct ethtool_rx_flow_spec *)&cmd->fs;
 363         struct enic_rfs_fltr_node *n;
 364
 365         n = htbl_fltr_search(enic, (u16)fsp->location);
 366         if (!n)
 367                 return -EINVAL;
 368         switch (n->keys.basic.ip_proto) {
 369         case IPPROTO_TCP:
 370                 fsp->flow_type = TCP_V4_FLOW;
 371                 break;
 372         case IPPROTO_UDP:
 373                 fsp->flow_type = UDP_V4_FLOW;
 374                 break;
 375         default:
 376                 return -EINVAL;
 377                 break;
 378         }
 379
 380         fsp->h_u.tcp_ip4_spec.ip4src = flow_get_u32_src(&n->keys);
 381         fsp->m_u.tcp_ip4_spec.ip4src = (__u32)~0;
 382
 383         fsp->h_u.tcp_ip4_spec.ip4dst = flow_get_u32_dst(&n->keys);
 384         fsp->m_u.tcp_ip4_spec.ip4dst = (__u32)~0;
 385
 386         fsp->h_u.tcp_ip4_spec.psrc = n->keys.ports.src;
 387         fsp->m_u.tcp_ip4_spec.psrc = (__u16)~0;
 388
 389         fsp->h_u.tcp_ip4_spec.pdst = n->keys.ports.dst;
 390         fsp->m_u.tcp_ip4_spec.pdst = (__u16)~0;
 391
 392         fsp->ring_cookie = n->rq_id;
 393
 394         return 0;
 395 }
 396
 397 static int enic_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
 398                           u32 *rule_locs)
 399 {
 400         struct enic *enic = netdev_priv(dev);
 401         int ret = 0;
 402
 403         switch (cmd->cmd) {
 404         case ETHTOOL_GRXRINGS:
 405                 cmd->data = enic->rq_count;
 406                 break;
 407         case ETHTOOL_GRXCLSRLCNT:
 408                 spin_lock_bh(&enic->rfs_h.lock);
 409                 cmd->rule_cnt = enic->rfs_h.max - enic->rfs_h.free;
 410                 cmd->data = enic->rfs_h.max;
 411                 spin_unlock_bh(&enic->rfs_h.lock);
 412                 break;
 413         case ETHTOOL_GRXCLSRLALL:
 414                 spin_lock_bh(&enic->rfs_h.lock);
 415                 ret = enic_grxclsrlall(enic, cmd, rule_locs);
 416                 spin_unlock_bh(&enic->rfs_h.lock);
 417                 break;
 418         case ETHTOOL_GRXCLSRULE:
 419                 spin_lock_bh(&enic->rfs_h.lock);
 420                 ret = enic_grxclsrule(enic, cmd);
 421                 spin_unlock_bh(&enic->rfs_h.lock);
 422                 break;
 423         default:
 424                 ret = -EOPNOTSUPP;
 425                 break;
 426         }
 427
 428         return ret;
 429 }
 430
 431 static int enic_get_tunable(struct net_device *dev,
 432                             const struct ethtool_tunable *tuna, void *data)
 433 {
 434         struct enic *enic = netdev_priv(dev);
 435         int ret = 0;
 436
 437         switch (tuna->id) {
 438         case ETHTOOL_RX_COPYBREAK:
 439                 *(u32 *)data = enic->rx_copybreak;
 440                 break;
 441         default:
 442                 ret = -EINVAL;
 443                 break;
 444         }
 445
 446         return ret;
 447 }
 448
 449 static int enic_set_tunable(struct net_device *dev,
 450                             const struct ethtool_tunable *tuna,
 451                             const void *data)
 452 {
 453         struct enic *enic = netdev_priv(dev);
 454         int ret = 0;
 455
 456         switch (tuna->id) {
 457         case ETHTOOL_RX_COPYBREAK:
 458                 enic->rx_copybreak = *(u32 *)data;
 459                 break;
 460         default:
 461                 ret = -EINVAL;
 462                 break;
 463         }
 464
 465         return ret;
 466 }
 467
 468 static u32 enic_get_rxfh_key_size(struct net_device *netdev)
 469 {
 470         return ENIC_RSS_LEN;
 471 }
 472
 473 static int enic_get_rxfh(struct net_device *netdev, u32 *indir, u8 *hkey,
 474                          u8 *hfunc)
 475 {
 476         struct enic *enic = netdev_priv(netdev);
 477
 478         if (hkey)
 479                 memcpy(hkey, enic->rss_key, ENIC_RSS_LEN);
 480
 481         if (hfunc)
 482                 *hfunc = ETH_RSS_HASH_TOP;
 483
 484         return 0;
 485 }
 486
 487 static int enic_set_rxfh(struct net_device *netdev, const u32 *indir,
 488                          const u8 *hkey, const u8 hfunc)
 489 {
 490         struct enic *enic = netdev_priv(netdev);
 491
 492         if ((hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) ||
 493             indir)
 494                 return -EINVAL;
 495
 496         if (hkey)
 497                 memcpy(enic->rss_key, hkey, ENIC_RSS_LEN);
 498
 499         return __enic_set_rsskey(enic);
 500 }
 501
 502 static const struct ethtool_ops enic_ethtool_ops = {
 503         .get_settings = enic_get_settings,
 504         .get_drvinfo = enic_get_drvinfo,
 505         .get_msglevel = enic_get_msglevel,
 506         .set_msglevel = enic_set_msglevel,
 507         .get_link = ethtool_op_get_link,
 508         .get_strings = enic_get_strings,
 509         .get_sset_count = enic_get_sset_count,
 510         .get_ethtool_stats = enic_get_ethtool_stats,
 511         .get_coalesce = enic_get_coalesce,
 512         .set_coalesce = enic_set_coalesce,
 513         .get_rxnfc = enic_get_rxnfc,
 514         .get_tunable = enic_get_tunable,
 515         .set_tunable = enic_set_tunable,
 516         .get_rxfh_key_size = enic_get_rxfh_key_size,
 517         .get_rxfh = enic_get_rxfh,
 518         .set_rxfh = enic_set_rxfh,
 519 };
 520
 521 void enic_set_ethtool_ops(struct net_device *netdev)
 522 {
 523         netdev->ethtool_ops = &enic_ethtool_ops;
 524 }