drivers/net/gianfar_ethtool.c

   1 /*
   2  *  drivers/net/gianfar_ethtool.c
   3  *
   4  *  Gianfar Ethernet Driver
   5  *  Ethtool support for Gianfar Enet
   6  *  Based on e1000 ethtool support
   7  *
   8  *  Author: Andy Fleming
   9  *  Maintainer: Kumar Gala
  10  *
  11  *  Copyright (c) 2003,2004 Freescale Semiconductor, Inc.
  12  *
  13  *  This software may be used and distributed according to
  14  *  the terms of the GNU Public License, Version 2, incorporated herein
  15  *  by reference.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/string.h>
  20 #include <linux/errno.h>
  21 #include <linux/slab.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/init.h>
  24 #include <linux/delay.h>
  25 #include <linux/netdevice.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/skbuff.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/mm.h>
  30
  31 #include <asm/io.h>
  32 #include <asm/irq.h>
  33 #include <asm/uaccess.h>
  34 #include <linux/module.h>
  35 #include <linux/crc32.h>
  36 #include <asm/types.h>
  37 #include <linux/ethtool.h>
  38 #include <linux/mii.h>
  39 #include <linux/phy.h>
  40
  41 #include "gianfar.h"
  42
  43 extern void gfar_start(struct net_device *dev);
  44 extern int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
  45
  46 #define GFAR_MAX_COAL_USECS 0xffff
  47 #define GFAR_MAX_COAL_FRAMES 0xff
  48 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
  49                      u64 * buf);
  50 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
  51 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
  52 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
  53 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
  54 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
  55 static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
  56
  57 static char stat_gstrings[][ETH_GSTRING_LEN] = {
  58         "rx-dropped-by-kernel",
  59         "rx-large-frame-errors",
  60         "rx-short-frame-errors",
  61         "rx-non-octet-errors",
  62         "rx-crc-errors",
  63         "rx-overrun-errors",
  64         "rx-busy-errors",
  65         "rx-babbling-errors",
  66         "rx-truncated-frames",
  67         "ethernet-bus-error",
  68         "tx-babbling-errors",
  69         "tx-underrun-errors",
  70         "rx-skb-missing-errors",
  71         "tx-timeout-errors",
  72         "tx-rx-64-frames",
  73         "tx-rx-65-127-frames",
  74         "tx-rx-128-255-frames",
  75         "tx-rx-256-511-frames",
  76         "tx-rx-512-1023-frames",
  77         "tx-rx-1024-1518-frames",
  78         "tx-rx-1519-1522-good-vlan",
  79         "rx-bytes",
  80         "rx-packets",
  81         "rx-fcs-errors",
  82         "receive-multicast-packet",
  83         "receive-broadcast-packet",
  84         "rx-control-frame-packets",
  85         "rx-pause-frame-packets",
  86         "rx-unknown-op-code",
  87         "rx-alignment-error",
  88         "rx-frame-length-error",
  89         "rx-code-error",
  90         "rx-carrier-sense-error",
  91         "rx-undersize-packets",
  92         "rx-oversize-packets",
  93         "rx-fragmented-frames",
  94         "rx-jabber-frames",
  95         "rx-dropped-frames",
  96         "tx-byte-counter",
  97         "tx-packets",
  98         "tx-multicast-packets",
  99         "tx-broadcast-packets",
 100         "tx-pause-control-frames",
 101         "tx-deferral-packets",
 102         "tx-excessive-deferral-packets",
 103         "tx-single-collision-packets",
 104         "tx-multiple-collision-packets",
 105         "tx-late-collision-packets",
 106         "tx-excessive-collision-packets",
 107         "tx-total-collision",
 108         "reserved",
 109         "tx-dropped-frames",
 110         "tx-jabber-frames",
 111         "tx-fcs-errors",
 112         "tx-control-frames",
 113         "tx-oversize-frames",
 114         "tx-undersize-frames",
 115         "tx-fragmented-frames",
 116 };
 117
 118 /* Fill in a buffer with the strings which correspond to the
 119  * stats */
 120 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
 121 {
 122         struct gfar_private *priv = netdev_priv(dev);
 123
 124         if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
 125                 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
 126         else
 127                 memcpy(buf, stat_gstrings,
 128                                 GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
 129 }
 130
 131 /* Fill in an array of 64-bit statistics from various sources.
 132  * This array will be appended to the end of the ethtool_stats
 133  * structure, and returned to user space
 134  */
 135 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
 136 {
 137         int i;
 138         struct gfar_private *priv = netdev_priv(dev);
 139         u64 *extra = (u64 *) & priv->extra_stats;
 140
 141         if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
 142                 u32 __iomem *rmon = (u32 __iomem *) & priv->regs->rmon;
 143                 struct gfar_stats *stats = (struct gfar_stats *) buf;
 144
 145                 for (i = 0; i < GFAR_RMON_LEN; i++)
 146                         stats->rmon[i] = (u64) gfar_read(&rmon[i]);
 147
 148                 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
 149                         stats->extra[i] = extra[i];
 150         } else
 151                 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
 152                         buf[i] = extra[i];
 153 }
 154
 155 static int gfar_sset_count(struct net_device *dev, int sset)
 156 {
 157         struct gfar_private *priv = netdev_priv(dev);
 158
 159         switch (sset) {
 160         case ETH_SS_STATS:
 161                 if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
 162                         return GFAR_STATS_LEN;
 163                 else
 164                         return GFAR_EXTRA_STATS_LEN;
 165         default:
 166                 return -EOPNOTSUPP;
 167         }
 168 }
 169
 170 /* Fills in the drvinfo structure with some basic info */
 171 static void gfar_gdrvinfo(struct net_device *dev, struct
 172               ethtool_drvinfo *drvinfo)
 173 {
 174         strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
 175         strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
 176         strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
 177         strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
 178         drvinfo->regdump_len = 0;
 179         drvinfo->eedump_len = 0;
 180 }
 181
 182
 183 static int gfar_ssettings(struct net_device *dev, struct ethtool_cmd *cmd)
 184 {
 185         struct gfar_private *priv = netdev_priv(dev);
 186         struct phy_device *phydev = priv->phydev;
 187
 188         if (NULL == phydev)
 189                 return -ENODEV;
 190
 191         return phy_ethtool_sset(phydev, cmd);
 192 }
 193
 194
 195 /* Return the current settings in the ethtool_cmd structure */
 196 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
 197 {
 198         struct gfar_private *priv = netdev_priv(dev);
 199         struct phy_device *phydev = priv->phydev;
 200
 201         if (NULL == phydev)
 202                 return -ENODEV;
 203
 204         cmd->maxtxpkt = priv->txcount;
 205         cmd->maxrxpkt = priv->rxcount;
 206
 207         return phy_ethtool_gset(phydev, cmd);
 208 }
 209
 210 /* Return the length of the register structure */
 211 static int gfar_reglen(struct net_device *dev)
 212 {
 213         return sizeof (struct gfar);
 214 }
 215
 216 /* Return a dump of the GFAR register space */
 217 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
 218 {
 219         int i;
 220         struct gfar_private *priv = netdev_priv(dev);
 221         u32 __iomem *theregs = (u32 __iomem *) priv->regs;
 222         u32 *buf = (u32 *) regbuf;
 223
 224         for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
 225                 buf[i] = gfar_read(&theregs[i]);
 226 }
 227
 228 /* Convert microseconds to ethernet clock ticks, which changes
 229  * depending on what speed the controller is running at */
 230 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
 231 {
 232         unsigned int count;
 233
 234         /* The timer is different, depending on the interface speed */
 235         switch (priv->phydev->speed) {
 236         case SPEED_1000:
 237                 count = GFAR_GBIT_TIME;
 238                 break;
 239         case SPEED_100:
 240                 count = GFAR_100_TIME;
 241                 break;
 242         case SPEED_10:
 243         default:
 244                 count = GFAR_10_TIME;
 245                 break;
 246         }
 247
 248         /* Make sure we return a number greater than 0
 249          * if usecs > 0 */
 250         return ((usecs * 1000 + count - 1) / count);
 251 }
 252
 253 /* Convert ethernet clock ticks to microseconds */
 254 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
 255 {
 256         unsigned int count;
 257
 258         /* The timer is different, depending on the interface speed */
 259         switch (priv->phydev->speed) {
 260         case SPEED_1000:
 261                 count = GFAR_GBIT_TIME;
 262                 break;
 263         case SPEED_100:
 264                 count = GFAR_100_TIME;
 265                 break;
 266         case SPEED_10:
 267         default:
 268                 count = GFAR_10_TIME;
 269                 break;
 270         }
 271
 272         /* Make sure we return a number greater than 0 */
 273         /* if ticks is > 0 */
 274         return ((ticks * count) / 1000);
 275 }
 276
 277 /* Get the coalescing parameters, and put them in the cvals
 278  * structure.  */
 279 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
 280 {
 281         struct gfar_private *priv = netdev_priv(dev);
 282
 283         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
 284                 return -EOPNOTSUPP;
 285
 286         if (NULL == priv->phydev)
 287                 return -ENODEV;
 288
 289         cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
 290         cvals->rx_max_coalesced_frames = priv->rxcount;
 291
 292         cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
 293         cvals->tx_max_coalesced_frames = priv->txcount;
 294
 295         cvals->use_adaptive_rx_coalesce = 0;
 296         cvals->use_adaptive_tx_coalesce = 0;
 297
 298         cvals->pkt_rate_low = 0;
 299         cvals->rx_coalesce_usecs_low = 0;
 300         cvals->rx_max_coalesced_frames_low = 0;
 301         cvals->tx_coalesce_usecs_low = 0;
 302         cvals->tx_max_coalesced_frames_low = 0;
 303
 304         /* When the packet rate is below pkt_rate_high but above
 305          * pkt_rate_low (both measured in packets per second) the
 306          * normal {rx,tx}_* coalescing parameters are used.
 307          */
 308
 309         /* When the packet rate is (measured in packets per second)
 310          * is above pkt_rate_high, the {rx,tx}_*_high parameters are
 311          * used.
 312          */
 313         cvals->pkt_rate_high = 0;
 314         cvals->rx_coalesce_usecs_high = 0;
 315         cvals->rx_max_coalesced_frames_high = 0;
 316         cvals->tx_coalesce_usecs_high = 0;
 317         cvals->tx_max_coalesced_frames_high = 0;
 318
 319         /* How often to do adaptive coalescing packet rate sampling,
 320          * measured in seconds.  Must not be zero.
 321          */
 322         cvals->rate_sample_interval = 0;
 323
 324         return 0;
 325 }
 326
 327 /* Change the coalescing values.
 328  * Both cvals->*_usecs and cvals->*_frames have to be > 0
 329  * in order for coalescing to be active
 330  */
 331 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
 332 {
 333         struct gfar_private *priv = netdev_priv(dev);
 334
 335         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
 336                 return -EOPNOTSUPP;
 337
 338         /* Set up rx coalescing */
 339         if ((cvals->rx_coalesce_usecs == 0) ||
 340             (cvals->rx_max_coalesced_frames == 0))
 341                 priv->rxcoalescing = 0;
 342         else
 343                 priv->rxcoalescing = 1;
 344
 345         if (NULL == priv->phydev)
 346                 return -ENODEV;
 347
 348         /* Check the bounds of the values */
 349         if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
 350                 pr_info("Coalescing is limited to %d microseconds\n",
 351                                 GFAR_MAX_COAL_USECS);
 352                 return -EINVAL;
 353         }
 354
 355         if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
 356                 pr_info("Coalescing is limited to %d frames\n",
 357                                 GFAR_MAX_COAL_FRAMES);
 358                 return -EINVAL;
 359         }
 360
 361         priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
 362         priv->rxcount = cvals->rx_max_coalesced_frames;
 363
 364         /* Set up tx coalescing */
 365         if ((cvals->tx_coalesce_usecs == 0) ||
 366             (cvals->tx_max_coalesced_frames == 0))
 367                 priv->txcoalescing = 0;
 368         else
 369                 priv->txcoalescing = 1;
 370
 371         /* Check the bounds of the values */
 372         if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
 373                 pr_info("Coalescing is limited to %d microseconds\n",
 374                                 GFAR_MAX_COAL_USECS);
 375                 return -EINVAL;
 376         }
 377
 378         if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
 379                 pr_info("Coalescing is limited to %d frames\n",
 380                                 GFAR_MAX_COAL_FRAMES);
 381                 return -EINVAL;
 382         }
 383
 384         priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
 385         priv->txcount = cvals->tx_max_coalesced_frames;
 386
 387         if (priv->rxcoalescing)
 388                 gfar_write(&priv->regs->rxic,
 389                            mk_ic_value(priv->rxcount, priv->rxtime));
 390         else
 391                 gfar_write(&priv->regs->rxic, 0);
 392
 393         if (priv->txcoalescing)
 394                 gfar_write(&priv->regs->txic,
 395                            mk_ic_value(priv->txcount, priv->txtime));
 396         else
 397                 gfar_write(&priv->regs->txic, 0);
 398
 399         return 0;
 400 }
 401
 402 /* Fills in rvals with the current ring parameters.  Currently,
 403  * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
 404  * jumbo are ignored by the driver */
 405 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
 406 {
 407         struct gfar_private *priv = netdev_priv(dev);
 408
 409         rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
 410         rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
 411         rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
 412         rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
 413
 414         /* Values changeable by the user.  The valid values are
 415          * in the range 1 to the "*_max_pending" counterpart above.
 416          */
 417         rvals->rx_pending = priv->rx_ring_size;
 418         rvals->rx_mini_pending = priv->rx_ring_size;
 419         rvals->rx_jumbo_pending = priv->rx_ring_size;
 420         rvals->tx_pending = priv->tx_ring_size;
 421 }
 422
 423 /* Change the current ring parameters, stopping the controller if
 424  * necessary so that we don't mess things up while we're in
 425  * motion.  We wait for the ring to be clean before reallocating
 426  * the rings. */
 427 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
 428 {
 429         struct gfar_private *priv = netdev_priv(dev);
 430         int err = 0;
 431
 432         if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
 433                 return -EINVAL;
 434
 435         if (!is_power_of_2(rvals->rx_pending)) {
 436                 printk("%s: Ring sizes must be a power of 2\n",
 437                                 dev->name);
 438                 return -EINVAL;
 439         }
 440
 441         if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
 442                 return -EINVAL;
 443
 444         if (!is_power_of_2(rvals->tx_pending)) {
 445                 printk("%s: Ring sizes must be a power of 2\n",
 446                                 dev->name);
 447                 return -EINVAL;
 448         }
 449
 450         if (dev->flags & IFF_UP) {
 451                 unsigned long flags;
 452
 453                 /* Halt TX and RX, and process the frames which
 454                  * have already been received */
 455                 spin_lock_irqsave(&priv->txlock, flags);
 456                 spin_lock(&priv->rxlock);
 457
 458                 gfar_halt(dev);
 459                 gfar_clean_rx_ring(dev, priv->rx_ring_size);
 460
 461                 spin_unlock(&priv->rxlock);
 462                 spin_unlock_irqrestore(&priv->txlock, flags);
 463
 464                 /* Now we take down the rings to rebuild them */
 465                 stop_gfar(dev);
 466         }
 467
 468         /* Change the size */
 469         priv->rx_ring_size = rvals->rx_pending;
 470         priv->tx_ring_size = rvals->tx_pending;
 471
 472         /* Rebuild the rings with the new size */
 473         if (dev->flags & IFF_UP)
 474                 err = startup_gfar(dev);
 475
 476         return err;
 477 }
 478
 479 static int gfar_set_rx_csum(struct net_device *dev, uint32_t data)
 480 {
 481         struct gfar_private *priv = netdev_priv(dev);
 482         int err = 0;
 483
 484         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
 485                 return -EOPNOTSUPP;
 486
 487         if (dev->flags & IFF_UP) {
 488                 unsigned long flags;
 489
 490                 /* Halt TX and RX, and process the frames which
 491                  * have already been received */
 492                 spin_lock_irqsave(&priv->txlock, flags);
 493                 spin_lock(&priv->rxlock);
 494
 495                 gfar_halt(dev);
 496                 gfar_clean_rx_ring(dev, priv->rx_ring_size);
 497
 498                 spin_unlock(&priv->rxlock);
 499                 spin_unlock_irqrestore(&priv->txlock, flags);
 500
 501                 /* Now we take down the rings to rebuild them */
 502                 stop_gfar(dev);
 503         }
 504
 505         priv->rx_csum_enable = data;
 506
 507         if (dev->flags & IFF_UP)
 508                 err = startup_gfar(dev);
 509
 510         return err;
 511 }
 512
 513 static uint32_t gfar_get_rx_csum(struct net_device *dev)
 514 {
 515         struct gfar_private *priv = netdev_priv(dev);
 516
 517         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
 518                 return 0;
 519
 520         return priv->rx_csum_enable;
 521 }
 522
 523 static int gfar_set_tx_csum(struct net_device *dev, uint32_t data)
 524 {
 525         unsigned long flags;
 526         struct gfar_private *priv = netdev_priv(dev);
 527
 528         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
 529                 return -EOPNOTSUPP;
 530
 531         spin_lock_irqsave(&priv->txlock, flags);
 532         gfar_halt(dev);
 533
 534         if (data)
 535                 dev->features |= NETIF_F_IP_CSUM;
 536         else
 537                 dev->features &= ~NETIF_F_IP_CSUM;
 538
 539         gfar_start(dev);
 540         spin_unlock_irqrestore(&priv->txlock, flags);
 541
 542         return 0;
 543 }
 544
 545 static uint32_t gfar_get_tx_csum(struct net_device *dev)
 546 {
 547         struct gfar_private *priv = netdev_priv(dev);
 548
 549         if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM))
 550                 return 0;
 551
 552         return (dev->features & NETIF_F_IP_CSUM) != 0;
 553 }
 554
 555 static uint32_t gfar_get_msglevel(struct net_device *dev)
 556 {
 557         struct gfar_private *priv = netdev_priv(dev);
 558         return priv->msg_enable;
 559 }
 560
 561 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
 562 {
 563         struct gfar_private *priv = netdev_priv(dev);
 564         priv->msg_enable = data;
 565 }
 566
 567
 568 const struct ethtool_ops gfar_ethtool_ops = {
 569         .get_settings = gfar_gsettings,
 570         .set_settings = gfar_ssettings,
 571         .get_drvinfo = gfar_gdrvinfo,
 572         .get_regs_len = gfar_reglen,
 573         .get_regs = gfar_get_regs,
 574         .get_link = ethtool_op_get_link,
 575         .get_coalesce = gfar_gcoalesce,
 576         .set_coalesce = gfar_scoalesce,
 577         .get_ringparam = gfar_gringparam,
 578         .set_ringparam = gfar_sringparam,
 579         .get_strings = gfar_gstrings,
 580         .get_sset_count = gfar_sset_count,
 581         .get_ethtool_stats = gfar_fill_stats,
 582         .get_rx_csum = gfar_get_rx_csum,
 583         .get_tx_csum = gfar_get_tx_csum,
 584         .set_rx_csum = gfar_set_rx_csum,
 585         .set_tx_csum = gfar_set_tx_csum,
 586         .get_msglevel = gfar_get_msglevel,
 587         .set_msglevel = gfar_set_msglevel,
 588 };