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
  26 struct enic_stat {
  27         char name[ETH_GSTRING_LEN];
  28         unsigned int index;
  29 };
  30
  31 #define ENIC_TX_STAT(stat) { \
  32         .name = #stat, \
  33         .index = offsetof(struct vnic_tx_stats, stat) / sizeof(u64) \
  34 }
  35
  36 #define ENIC_RX_STAT(stat) { \
  37         .name = #stat, \
  38         .index = offsetof(struct vnic_rx_stats, stat) / sizeof(u64) \
  39 }
  40
  41 static const struct enic_stat enic_tx_stats[] = {
  42         ENIC_TX_STAT(tx_frames_ok),
  43         ENIC_TX_STAT(tx_unicast_frames_ok),
  44         ENIC_TX_STAT(tx_multicast_frames_ok),
  45         ENIC_TX_STAT(tx_broadcast_frames_ok),
  46         ENIC_TX_STAT(tx_bytes_ok),
  47         ENIC_TX_STAT(tx_unicast_bytes_ok),
  48         ENIC_TX_STAT(tx_multicast_bytes_ok),
  49         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  50         ENIC_TX_STAT(tx_drops),
  51         ENIC_TX_STAT(tx_errors),
  52         ENIC_TX_STAT(tx_tso),
  53 };
  54
  55 static const struct enic_stat enic_rx_stats[] = {
  56         ENIC_RX_STAT(rx_frames_ok),
  57         ENIC_RX_STAT(rx_frames_total),
  58         ENIC_RX_STAT(rx_unicast_frames_ok),
  59         ENIC_RX_STAT(rx_multicast_frames_ok),
  60         ENIC_RX_STAT(rx_broadcast_frames_ok),
  61         ENIC_RX_STAT(rx_bytes_ok),
  62         ENIC_RX_STAT(rx_unicast_bytes_ok),
  63         ENIC_RX_STAT(rx_multicast_bytes_ok),
  64         ENIC_RX_STAT(rx_broadcast_bytes_ok),
  65         ENIC_RX_STAT(rx_drop),
  66         ENIC_RX_STAT(rx_no_bufs),
  67         ENIC_RX_STAT(rx_errors),
  68         ENIC_RX_STAT(rx_rss),
  69         ENIC_RX_STAT(rx_crc_errors),
  70         ENIC_RX_STAT(rx_frames_64),
  71         ENIC_RX_STAT(rx_frames_127),
  72         ENIC_RX_STAT(rx_frames_255),
  73         ENIC_RX_STAT(rx_frames_511),
  74         ENIC_RX_STAT(rx_frames_1023),
  75         ENIC_RX_STAT(rx_frames_1518),
  76         ENIC_RX_STAT(rx_frames_to_max),
  77 };
  78
  79 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
  80 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
  81
  82 void enic_intr_coal_set_rx(struct enic *enic, u32 timer)
  83 {
  84         int i;
  85         int intr;
  86
  87         for (i = 0; i < enic->rq_count; i++) {
  88                 intr = enic_msix_rq_intr(enic, i);
  89                 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
  90         }
  91 }
  92
  93 static int enic_get_settings(struct net_device *netdev,
  94         struct ethtool_cmd *ecmd)
  95 {
  96         struct enic *enic = netdev_priv(netdev);
  97
  98         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
  99         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 100         ecmd->port = PORT_FIBRE;
 101         ecmd->transceiver = XCVR_EXTERNAL;
 102
 103         if (netif_carrier_ok(netdev)) {
 104                 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
 105                 ecmd->duplex = DUPLEX_FULL;
 106         } else {
 107                 ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
 108                 ecmd->duplex = DUPLEX_UNKNOWN;
 109         }
 110
 111         ecmd->autoneg = AUTONEG_DISABLE;
 112
 113         return 0;
 114 }
 115
 116 static void enic_get_drvinfo(struct net_device *netdev,
 117         struct ethtool_drvinfo *drvinfo)
 118 {
 119         struct enic *enic = netdev_priv(netdev);
 120         struct vnic_devcmd_fw_info *fw_info;
 121
 122         enic_dev_fw_info(enic, &fw_info);
 123
 124         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 125         strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 126         strlcpy(drvinfo->fw_version, fw_info->fw_version,
 127                 sizeof(drvinfo->fw_version));
 128         strlcpy(drvinfo->bus_info, pci_name(enic->pdev),
 129                 sizeof(drvinfo->bus_info));
 130 }
 131
 132 static void enic_get_strings(struct net_device *netdev, u32 stringset,
 133         u8 *data)
 134 {
 135         unsigned int i;
 136
 137         switch (stringset) {
 138         case ETH_SS_STATS:
 139                 for (i = 0; i < enic_n_tx_stats; i++) {
 140                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 141                         data += ETH_GSTRING_LEN;
 142                 }
 143                 for (i = 0; i < enic_n_rx_stats; i++) {
 144                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 145                         data += ETH_GSTRING_LEN;
 146                 }
 147                 break;
 148         }
 149 }
 150
 151 static int enic_get_sset_count(struct net_device *netdev, int sset)
 152 {
 153         switch (sset) {
 154         case ETH_SS_STATS:
 155                 return enic_n_tx_stats + enic_n_rx_stats;
 156         default:
 157                 return -EOPNOTSUPP;
 158         }
 159 }
 160
 161 static void enic_get_ethtool_stats(struct net_device *netdev,
 162         struct ethtool_stats *stats, u64 *data)
 163 {
 164         struct enic *enic = netdev_priv(netdev);
 165         struct vnic_stats *vstats;
 166         unsigned int i;
 167
 168         enic_dev_stats_dump(enic, &vstats);
 169
 170         for (i = 0; i < enic_n_tx_stats; i++)
 171                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].index];
 172         for (i = 0; i < enic_n_rx_stats; i++)
 173                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].index];
 174 }
 175
 176 static u32 enic_get_msglevel(struct net_device *netdev)
 177 {
 178         struct enic *enic = netdev_priv(netdev);
 179         return enic->msg_enable;
 180 }
 181
 182 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 183 {
 184         struct enic *enic = netdev_priv(netdev);
 185         enic->msg_enable = value;
 186 }
 187
 188 static int enic_get_coalesce(struct net_device *netdev,
 189         struct ethtool_coalesce *ecmd)
 190 {
 191         struct enic *enic = netdev_priv(netdev);
 192         struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
 193
 194         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 195         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 196         if (rxcoal->use_adaptive_rx_coalesce)
 197                 ecmd->use_adaptive_rx_coalesce = 1;
 198         ecmd->rx_coalesce_usecs_low = rxcoal->small_pkt_range_start;
 199         ecmd->rx_coalesce_usecs_high = rxcoal->range_end;
 200
 201         return 0;
 202 }
 203
 204 static int enic_set_coalesce(struct net_device *netdev,
 205         struct ethtool_coalesce *ecmd)
 206 {
 207         struct enic *enic = netdev_priv(netdev);
 208         u32 tx_coalesce_usecs;
 209         u32 rx_coalesce_usecs;
 210         u32 rx_coalesce_usecs_low;
 211         u32 rx_coalesce_usecs_high;
 212         u32 coalesce_usecs_max;
 213         unsigned int i, intr;
 214         struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
 215
 216         coalesce_usecs_max = vnic_dev_get_intr_coal_timer_max(enic->vdev);
 217         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 218                                   coalesce_usecs_max);
 219         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 220                                   coalesce_usecs_max);
 221
 222         rx_coalesce_usecs_low = min_t(u32, ecmd->rx_coalesce_usecs_low,
 223                                       coalesce_usecs_max);
 224         rx_coalesce_usecs_high = min_t(u32, ecmd->rx_coalesce_usecs_high,
 225                                        coalesce_usecs_max);
 226
 227         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 228         case VNIC_DEV_INTR_MODE_INTX:
 229                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 230                         return -EINVAL;
 231                 if (ecmd->use_adaptive_rx_coalesce      ||
 232                     ecmd->rx_coalesce_usecs_low         ||
 233                     ecmd->rx_coalesce_usecs_high)
 234                         return -EOPNOTSUPP;
 235
 236                 intr = enic_legacy_io_intr();
 237                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 238                         tx_coalesce_usecs);
 239                 break;
 240         case VNIC_DEV_INTR_MODE_MSI:
 241                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 242                         return -EINVAL;
 243                 if (ecmd->use_adaptive_rx_coalesce      ||
 244                     ecmd->rx_coalesce_usecs_low         ||
 245                     ecmd->rx_coalesce_usecs_high)
 246                         return -EOPNOTSUPP;
 247
 248                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 249                         tx_coalesce_usecs);
 250                 break;
 251         case VNIC_DEV_INTR_MODE_MSIX:
 252                 for (i = 0; i < enic->wq_count; i++) {
 253                         intr = enic_msix_wq_intr(enic, i);
 254                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 255                                 tx_coalesce_usecs);
 256                 }
 257
 258                 if (rxcoal->use_adaptive_rx_coalesce) {
 259                         if (!ecmd->use_adaptive_rx_coalesce) {
 260                                 rxcoal->use_adaptive_rx_coalesce = 0;
 261                                 enic_intr_coal_set_rx(enic, rx_coalesce_usecs);
 262                         }
 263                 } else {
 264                         if (ecmd->use_adaptive_rx_coalesce)
 265                                 rxcoal->use_adaptive_rx_coalesce = 1;
 266                         else
 267                                 enic_intr_coal_set_rx(enic, rx_coalesce_usecs);
 268                 }
 269
 270                 if (ecmd->rx_coalesce_usecs_high) {
 271                         if (rx_coalesce_usecs_high <
 272                             (rx_coalesce_usecs_low + ENIC_AIC_LARGE_PKT_DIFF))
 273                                 return -EINVAL;
 274                         rxcoal->range_end = rx_coalesce_usecs_high;
 275                         rxcoal->small_pkt_range_start = rx_coalesce_usecs_low;
 276                         rxcoal->large_pkt_range_start = rx_coalesce_usecs_low +
 277                                                         ENIC_AIC_LARGE_PKT_DIFF;
 278                 }
 279                 break;
 280         default:
 281                 break;
 282         }
 283
 284         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 285         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 286
 287         return 0;
 288 }
 289
 290 static const struct ethtool_ops enic_ethtool_ops = {
 291         .get_settings = enic_get_settings,
 292         .get_drvinfo = enic_get_drvinfo,
 293         .get_msglevel = enic_get_msglevel,
 294         .set_msglevel = enic_set_msglevel,
 295         .get_link = ethtool_op_get_link,
 296         .get_strings = enic_get_strings,
 297         .get_sset_count = enic_get_sset_count,
 298         .get_ethtool_stats = enic_get_ethtool_stats,
 299         .get_coalesce = enic_get_coalesce,
 300         .set_coalesce = enic_set_coalesce,
 301 };
 302
 303 void enic_set_ethtool_ops(struct net_device *netdev)
 304 {
 305         netdev->ethtool_ops = &enic_ethtool_ops;
 306 }