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
  43 #include "gianfar.h"
  44
  45 #define is_power_of_2(x)        ((x) != 0 && (((x) & ((x) - 1)) == 0))
  46
  47 extern int startup_gfar(struct net_device *dev);
  48 extern void stop_gfar(struct net_device *dev);
  49 extern void gfar_receive(int irq, void *dev_id, struct pt_regs *regs);
  50
  51 void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
  52                      u64 * buf);
  53 void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
  54 int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
  55 int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
  56 void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
  57 int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
  58 void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
  59
  60 static char stat_gstrings[][ETH_GSTRING_LEN] = {
  61         "rx-dropped-by-kernel",
  62         "rx-large-frame-errors",
  63         "rx-short-frame-errors",
  64         "rx-non-octet-errors",
  65         "rx-crc-errors",
  66         "rx-overrun-errors",
  67         "rx-busy-errors",
  68         "rx-babbling-errors",
  69         "rx-truncated-frames",
  70         "ethernet-bus-error",
  71         "tx-babbling-errors",
  72         "tx-underrun-errors",
  73         "rx-skb-missing-errors",
  74         "tx-timeout-errors",
  75         "tx-rx-64-frames",
  76         "tx-rx-65-127-frames",
  77         "tx-rx-128-255-frames",
  78         "tx-rx-256-511-frames",
  79         "tx-rx-512-1023-frames",
  80         "tx-rx-1024-1518-frames",
  81         "tx-rx-1519-1522-good-vlan",
  82         "rx-bytes",
  83         "rx-packets",
  84         "rx-fcs-errors",
  85         "receive-multicast-packet",
  86         "receive-broadcast-packet",
  87         "rx-control-frame-packets",
  88         "rx-pause-frame-packets",
  89         "rx-unknown-op-code",
  90         "rx-alignment-error",
  91         "rx-frame-length-error",
  92         "rx-code-error",
  93         "rx-carrier-sense-error",
  94         "rx-undersize-packets",
  95         "rx-oversize-packets",
  96         "rx-fragmented-frames",
  97         "rx-jabber-frames",
  98         "rx-dropped-frames",
  99         "tx-byte-counter",
 100         "tx-packets",
 101         "tx-multicast-packets",
 102         "tx-broadcast-packets",
 103         "tx-pause-control-frames",
 104         "tx-deferral-packets",
 105         "tx-excessive-deferral-packets",
 106         "tx-single-collision-packets",
 107         "tx-multiple-collision-packets",
 108         "tx-late-collision-packets",
 109         "tx-excessive-collision-packets",
 110         "tx-total-collision",
 111         "reserved",
 112         "tx-dropped-frames",
 113         "tx-jabber-frames",
 114         "tx-fcs-errors",
 115         "tx-control-frames",
 116         "tx-oversize-frames",
 117         "tx-undersize-frames",
 118         "tx-fragmented-frames",
 119 };
 120
 121 /* Fill in an array of 64-bit statistics from various sources.
 122  * This array will be appended to the end of the ethtool_stats
 123  * structure, and returned to user space
 124  */
 125 void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
 126 {
 127         int i;
 128         struct gfar_private *priv = netdev_priv(dev);
 129         u32 *rmon = (u32 *) & priv->regs->rmon;
 130         u64 *extra = (u64 *) & priv->extra_stats;
 131         struct gfar_stats *stats = (struct gfar_stats *) buf;
 132
 133         for (i = 0; i < GFAR_RMON_LEN; i++) {
 134                 stats->rmon[i] = (u64) (rmon[i]);
 135         }
 136
 137         for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
 138                 stats->extra[i] = extra[i];
 139         }
 140 }
 141
 142 /* Returns the number of stats (and their corresponding strings) */
 143 int gfar_stats_count(struct net_device *dev)
 144 {
 145         return GFAR_STATS_LEN;
 146 }
 147
 148 void gfar_gstrings_normon(struct net_device *dev, u32 stringset, u8 * buf)
 149 {
 150         memcpy(buf, stat_gstrings, GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
 151 }
 152
 153 void gfar_fill_stats_normon(struct net_device *dev,
 154                 struct ethtool_stats *dummy, u64 * buf)
 155 {
 156         int i;
 157         struct gfar_private *priv = netdev_priv(dev);
 158         u64 *extra = (u64 *) & priv->extra_stats;
 159
 160         for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
 161                 buf[i] = extra[i];
 162         }
 163 }
 164
 165
 166 int gfar_stats_count_normon(struct net_device *dev)
 167 {
 168         return GFAR_EXTRA_STATS_LEN;
 169 }
 170 /* Fills in the drvinfo structure with some basic info */
 171 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->n_stats = GFAR_STATS_LEN;
 179         drvinfo->testinfo_len = 0;
 180         drvinfo->regdump_len = 0;
 181         drvinfo->eedump_len = 0;
 182 }
 183
 184 /* Return the current settings in the ethtool_cmd structure */
 185 int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
 186 {
 187         struct gfar_private *priv = netdev_priv(dev);
 188         uint gigabit_support =
 189                 priv->einfo->flags & GFAR_HAS_GIGABIT ? SUPPORTED_1000baseT_Full : 0;
 190         uint gigabit_advert =
 191                 priv->einfo->flags & GFAR_HAS_GIGABIT ? ADVERTISED_1000baseT_Full: 0;
 192
 193         cmd->supported = (SUPPORTED_10baseT_Half
 194                           | SUPPORTED_100baseT_Half
 195                           | SUPPORTED_100baseT_Full
 196                           | gigabit_support | SUPPORTED_Autoneg);
 197
 198         /* For now, we always advertise everything */
 199         cmd->advertising = (ADVERTISED_10baseT_Half
 200                             | ADVERTISED_100baseT_Half
 201                             | ADVERTISED_100baseT_Full
 202                             | gigabit_advert | ADVERTISED_Autoneg);
 203
 204         cmd->speed = priv->mii_info->speed;
 205         cmd->duplex = priv->mii_info->duplex;
 206         cmd->port = PORT_MII;
 207         cmd->phy_address = priv->mii_info->mii_id;
 208         cmd->transceiver = XCVR_EXTERNAL;
 209         cmd->autoneg = AUTONEG_ENABLE;
 210         cmd->maxtxpkt = priv->txcount;
 211         cmd->maxrxpkt = priv->rxcount;
 212
 213         return 0;
 214 }
 215
 216 /* Return the length of the register structure */
 217 int gfar_reglen(struct net_device *dev)
 218 {
 219         return sizeof (struct gfar);
 220 }
 221
 222 /* Return a dump of the GFAR register space */
 223 void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
 224 {
 225         int i;
 226         struct gfar_private *priv = netdev_priv(dev);
 227         u32 *theregs = (u32 *) priv->regs;
 228         u32 *buf = (u32 *) regbuf;
 229
 230         for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
 231                 buf[i] = theregs[i];
 232 }
 233
 234 /* Fill in a buffer with the strings which correspond to the
 235  * stats */
 236 void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
 237 {
 238         memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
 239 }
 240
 241 /* Convert microseconds to ethernet clock ticks, which changes
 242  * depending on what speed the controller is running at */
 243 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
 244 {
 245         unsigned int count;
 246
 247         /* The timer is different, depending on the interface speed */
 248         switch (priv->mii_info->speed) {
 249         case 1000:
 250                 count = GFAR_GBIT_TIME;
 251                 break;
 252         case 100:
 253                 count = GFAR_100_TIME;
 254                 break;
 255         case 10:
 256         default:
 257                 count = GFAR_10_TIME;
 258                 break;
 259         }
 260
 261         /* Make sure we return a number greater than 0
 262          * if usecs > 0 */
 263         return ((usecs * 1000 + count - 1) / count);
 264 }
 265
 266 /* Convert ethernet clock ticks to microseconds */
 267 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
 268 {
 269         unsigned int count;
 270
 271         /* The timer is different, depending on the interface speed */
 272         switch (priv->mii_info->speed) {
 273         case 1000:
 274                 count = GFAR_GBIT_TIME;
 275                 break;
 276         case 100:
 277                 count = GFAR_100_TIME;
 278                 break;
 279         case 10:
 280         default:
 281                 count = GFAR_10_TIME;
 282                 break;
 283         }
 284
 285         /* Make sure we return a number greater than 0 */
 286         /* if ticks is > 0 */
 287         return ((ticks * count) / 1000);
 288 }
 289
 290 /* Get the coalescing parameters, and put them in the cvals
 291  * structure.  */
 292 int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
 293 {
 294         struct gfar_private *priv = netdev_priv(dev);
 295
 296         cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
 297         cvals->rx_max_coalesced_frames = priv->rxcount;
 298
 299         cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
 300         cvals->tx_max_coalesced_frames = priv->txcount;
 301
 302         cvals->use_adaptive_rx_coalesce = 0;
 303         cvals->use_adaptive_tx_coalesce = 0;
 304
 305         cvals->pkt_rate_low = 0;
 306         cvals->rx_coalesce_usecs_low = 0;
 307         cvals->rx_max_coalesced_frames_low = 0;
 308         cvals->tx_coalesce_usecs_low = 0;
 309         cvals->tx_max_coalesced_frames_low = 0;
 310
 311         /* When the packet rate is below pkt_rate_high but above
 312          * pkt_rate_low (both measured in packets per second) the
 313          * normal {rx,tx}_* coalescing parameters are used.
 314          */
 315
 316         /* When the packet rate is (measured in packets per second)
 317          * is above pkt_rate_high, the {rx,tx}_*_high parameters are
 318          * used.
 319          */
 320         cvals->pkt_rate_high = 0;
 321         cvals->rx_coalesce_usecs_high = 0;
 322         cvals->rx_max_coalesced_frames_high = 0;
 323         cvals->tx_coalesce_usecs_high = 0;
 324         cvals->tx_max_coalesced_frames_high = 0;
 325
 326         /* How often to do adaptive coalescing packet rate sampling,
 327          * measured in seconds.  Must not be zero.
 328          */
 329         cvals->rate_sample_interval = 0;
 330
 331         return 0;
 332 }
 333
 334 /* Change the coalescing values.
 335  * Both cvals->*_usecs and cvals->*_frames have to be > 0
 336  * in order for coalescing to be active
 337  */
 338 int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
 339 {
 340         struct gfar_private *priv = netdev_priv(dev);
 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         priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
 350         priv->rxcount = cvals->rx_max_coalesced_frames;
 351
 352         /* Set up tx coalescing */
 353         if ((cvals->tx_coalesce_usecs == 0) ||
 354             (cvals->tx_max_coalesced_frames == 0))
 355                 priv->txcoalescing = 0;
 356         else
 357                 priv->txcoalescing = 1;
 358
 359         priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
 360         priv->txcount = cvals->tx_max_coalesced_frames;
 361
 362         if (priv->rxcoalescing)
 363                 gfar_write(&priv->regs->rxic,
 364                            mk_ic_value(priv->rxcount, priv->rxtime));
 365         else
 366                 gfar_write(&priv->regs->rxic, 0);
 367
 368         if (priv->txcoalescing)
 369                 gfar_write(&priv->regs->txic,
 370                            mk_ic_value(priv->txcount, priv->txtime));
 371         else
 372                 gfar_write(&priv->regs->txic, 0);
 373
 374         return 0;
 375 }
 376
 377 /* Fills in rvals with the current ring parameters.  Currently,
 378  * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
 379  * jumbo are ignored by the driver */
 380 void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
 381 {
 382         struct gfar_private *priv = netdev_priv(dev);
 383
 384         rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
 385         rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
 386         rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
 387         rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
 388
 389         /* Values changeable by the user.  The valid values are
 390          * in the range 1 to the "*_max_pending" counterpart above.
 391          */
 392         rvals->rx_pending = priv->rx_ring_size;
 393         rvals->rx_mini_pending = priv->rx_ring_size;
 394         rvals->rx_jumbo_pending = priv->rx_ring_size;
 395         rvals->tx_pending = priv->tx_ring_size;
 396 }
 397
 398 /* Change the current ring parameters, stopping the controller if
 399  * necessary so that we don't mess things up while we're in
 400  * motion.  We wait for the ring to be clean before reallocating
 401  * the rings. */
 402 int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
 403 {
 404         u32 tempval;
 405         struct gfar_private *priv = netdev_priv(dev);
 406         int err = 0;
 407
 408         if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
 409                 return -EINVAL;
 410
 411         if (!is_power_of_2(rvals->rx_pending)) {
 412                 printk("%s: Ring sizes must be a power of 2\n",
 413                                 dev->name);
 414                 return -EINVAL;
 415         }
 416
 417         if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
 418                 return -EINVAL;
 419
 420         if (!is_power_of_2(rvals->tx_pending)) {
 421                 printk("%s: Ring sizes must be a power of 2\n",
 422                                 dev->name);
 423                 return -EINVAL;
 424         }
 425
 426         /* Stop the controller so we don't rx any more frames */
 427         /* But first, make sure we clear the bits */
 428         tempval = gfar_read(&priv->regs->dmactrl);
 429         tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
 430         gfar_write(&priv->regs->dmactrl, tempval);
 431
 432         tempval = gfar_read(&priv->regs->dmactrl);
 433         tempval |= (DMACTRL_GRS | DMACTRL_GTS);
 434         gfar_write(&priv->regs->dmactrl, tempval);
 435
 436         while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)))
 437                 cpu_relax();
 438
 439         /* Note that rx is not clean right now */
 440         priv->rxclean = 0;
 441
 442         if (dev->flags & IFF_UP) {
 443                 /* Tell the driver to process the rest of the frames */
 444                 gfar_receive(0, (void *) dev, NULL);
 445
 446                 /* Now wait for it to be done */
 447                 wait_event_interruptible(priv->rxcleanupq, priv->rxclean);
 448
 449                 /* Ok, all packets have been handled.  Now we bring it down,
 450                  * change the ring size, and bring it up */
 451
 452                 stop_gfar(dev);
 453         }
 454
 455         priv->rx_ring_size = rvals->rx_pending;
 456         priv->tx_ring_size = rvals->tx_pending;
 457
 458         if (dev->flags & IFF_UP)
 459                 err = startup_gfar(dev);
 460
 461         return err;
 462 }
 463
 464 struct ethtool_ops gfar_ethtool_ops = {
 465         .get_settings = gfar_gsettings,
 466         .get_drvinfo = gfar_gdrvinfo,
 467         .get_regs_len = gfar_reglen,
 468         .get_regs = gfar_get_regs,
 469         .get_link = ethtool_op_get_link,
 470         .get_coalesce = gfar_gcoalesce,
 471         .set_coalesce = gfar_scoalesce,
 472         .get_ringparam = gfar_gringparam,
 473         .set_ringparam = gfar_sringparam,
 474         .get_strings = gfar_gstrings,
 475         .get_stats_count = gfar_stats_count,
 476         .get_ethtool_stats = gfar_fill_stats,
 477 };
 478
 479 struct ethtool_ops gfar_normon_nocoalesce_ethtool_ops = {
 480         .get_settings = gfar_gsettings,
 481         .get_drvinfo = gfar_gdrvinfo,
 482         .get_regs_len = gfar_reglen,
 483         .get_regs = gfar_get_regs,
 484         .get_link = ethtool_op_get_link,
 485         .get_ringparam = gfar_gringparam,
 486         .set_ringparam = gfar_sringparam,
 487         .get_strings = gfar_gstrings_normon,
 488         .get_stats_count = gfar_stats_count_normon,
 489         .get_ethtool_stats = gfar_fill_stats_normon,
 490 };
 491
 492 struct ethtool_ops gfar_nocoalesce_ethtool_ops = {
 493         .get_settings = gfar_gsettings,
 494         .get_drvinfo = gfar_gdrvinfo,
 495         .get_regs_len = gfar_reglen,
 496         .get_regs = gfar_get_regs,
 497         .get_link = ethtool_op_get_link,
 498         .get_ringparam = gfar_gringparam,
 499         .set_ringparam = gfar_sringparam,
 500         .get_strings = gfar_gstrings,
 501         .get_stats_count = gfar_stats_count,
 502         .get_ethtool_stats = gfar_fill_stats,
 503 };
 504
 505 struct ethtool_ops gfar_normon_ethtool_ops = {
 506         .get_settings = gfar_gsettings,
 507         .get_drvinfo = gfar_gdrvinfo,
 508         .get_regs_len = gfar_reglen,
 509         .get_regs = gfar_get_regs,
 510         .get_link = ethtool_op_get_link,
 511         .get_coalesce = gfar_gcoalesce,
 512         .set_coalesce = gfar_scoalesce,
 513         .get_ringparam = gfar_gringparam,
 514         .set_ringparam = gfar_sringparam,
 515         .get_strings = gfar_gstrings_normon,
 516         .get_stats_count = gfar_stats_count_normon,
 517         .get_ethtool_stats = gfar_fill_stats_normon,
 518 };
 519
 520 struct ethtool_ops *gfar_op_array[] = {
 521         &gfar_ethtool_ops,
 522         &gfar_normon_ethtool_ops,
 523         &gfar_nocoalesce_ethtool_ops,
 524         &gfar_normon_nocoalesce_ethtool_ops
 525 };