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