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