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gianfar_ethtool.c
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1 /*
2  * drivers/net/ethernet/freescale/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  * Modifier: Sandeep Gopalpet <[email protected]>
11  *
12  * Copyright 2003-2006, 2008-2009, 2011 Freescale Semiconductor, Inc.
13  *
14  * This software may be used and distributed according to
15  * the terms of the GNU Public License, Version 2, incorporated herein
16  * by reference.
17  */
18 
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20 
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/errno.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/net_tstamp.h>
30 #include <linux/skbuff.h>
31 #include <linux/spinlock.h>
32 #include <linux/mm.h>
33 
34 #include <asm/io.h>
35 #include <asm/irq.h>
36 #include <asm/uaccess.h>
37 #include <linux/module.h>
38 #include <linux/crc32.h>
39 #include <asm/types.h>
40 #include <linux/ethtool.h>
41 #include <linux/mii.h>
42 #include <linux/phy.h>
43 #include <linux/sort.h>
44 #include <linux/if_vlan.h>
45 
46 #include "gianfar.h"
47 
48 extern void gfar_start(struct net_device *dev);
49 extern int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue,
50  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,
58  struct ethtool_coalesce *cvals);
59 static int gfar_scoalesce(struct net_device *dev,
60  struct ethtool_coalesce *cvals);
61 static void gfar_gringparam(struct net_device *dev,
62  struct ethtool_ringparam *rvals);
63 static int gfar_sringparam(struct net_device *dev,
64  struct ethtool_ringparam *rvals);
65 static void gfar_gdrvinfo(struct net_device *dev,
66  struct ethtool_drvinfo *drvinfo);
67 
68 static const char stat_gstrings[][ETH_GSTRING_LEN] = {
69  "rx-dropped-by-kernel",
70  "rx-large-frame-errors",
71  "rx-short-frame-errors",
72  "rx-non-octet-errors",
73  "rx-crc-errors",
74  "rx-overrun-errors",
75  "rx-busy-errors",
76  "rx-babbling-errors",
77  "rx-truncated-frames",
78  "ethernet-bus-error",
79  "tx-babbling-errors",
80  "tx-underrun-errors",
81  "rx-skb-missing-errors",
82  "tx-timeout-errors",
83  "tx-rx-64-frames",
84  "tx-rx-65-127-frames",
85  "tx-rx-128-255-frames",
86  "tx-rx-256-511-frames",
87  "tx-rx-512-1023-frames",
88  "tx-rx-1024-1518-frames",
89  "tx-rx-1519-1522-good-vlan",
90  "rx-bytes",
91  "rx-packets",
92  "rx-fcs-errors",
93  "receive-multicast-packet",
94  "receive-broadcast-packet",
95  "rx-control-frame-packets",
96  "rx-pause-frame-packets",
97  "rx-unknown-op-code",
98  "rx-alignment-error",
99  "rx-frame-length-error",
100  "rx-code-error",
101  "rx-carrier-sense-error",
102  "rx-undersize-packets",
103  "rx-oversize-packets",
104  "rx-fragmented-frames",
105  "rx-jabber-frames",
106  "rx-dropped-frames",
107  "tx-byte-counter",
108  "tx-packets",
109  "tx-multicast-packets",
110  "tx-broadcast-packets",
111  "tx-pause-control-frames",
112  "tx-deferral-packets",
113  "tx-excessive-deferral-packets",
114  "tx-single-collision-packets",
115  "tx-multiple-collision-packets",
116  "tx-late-collision-packets",
117  "tx-excessive-collision-packets",
118  "tx-total-collision",
119  "reserved",
120  "tx-dropped-frames",
121  "tx-jabber-frames",
122  "tx-fcs-errors",
123  "tx-control-frames",
124  "tx-oversize-frames",
125  "tx-undersize-frames",
126  "tx-fragmented-frames",
127 };
128 
129 /* Fill in a buffer with the strings which correspond to the
130  * stats */
131 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
132 {
133  struct gfar_private *priv = netdev_priv(dev);
134 
135  if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
136  memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
137  else
138  memcpy(buf, stat_gstrings,
139  GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
140 }
141 
142 /* Fill in an array of 64-bit statistics from various sources.
143  * This array will be appended to the end of the ethtool_stats
144  * structure, and returned to user space
145  */
146 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
147  u64 *buf)
148 {
149  int i;
150  struct gfar_private *priv = netdev_priv(dev);
151  struct gfar __iomem *regs = priv->gfargrp[0].regs;
152  u64 *extra = (u64 *) & priv->extra_stats;
153 
154  if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
155  u32 __iomem *rmon = (u32 __iomem *) &regs->rmon;
156  struct gfar_stats *stats = (struct gfar_stats *) buf;
157 
158  for (i = 0; i < GFAR_RMON_LEN; i++)
159  stats->rmon[i] = (u64) gfar_read(&rmon[i]);
160 
161  for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
162  stats->extra[i] = extra[i];
163  } else
164  for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
165  buf[i] = extra[i];
166 }
167 
168 static int gfar_sset_count(struct net_device *dev, int sset)
169 {
170  struct gfar_private *priv = netdev_priv(dev);
171 
172  switch (sset) {
173  case ETH_SS_STATS:
174  if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
175  return GFAR_STATS_LEN;
176  else
177  return GFAR_EXTRA_STATS_LEN;
178  default:
179  return -EOPNOTSUPP;
180  }
181 }
182 
183 /* Fills in the drvinfo structure with some basic info */
184 static void gfar_gdrvinfo(struct net_device *dev,
185  struct ethtool_drvinfo *drvinfo)
186 {
187  strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
188  strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
189  strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
190  strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
191  drvinfo->regdump_len = 0;
192  drvinfo->eedump_len = 0;
193 }
194 
195 
196 static int gfar_ssettings(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  return phy_ethtool_sset(phydev, cmd);
205 }
206 
207 
208 /* Return the current settings in the ethtool_cmd structure */
209 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
210 {
211  struct gfar_private *priv = netdev_priv(dev);
212  struct phy_device *phydev = priv->phydev;
213  struct gfar_priv_rx_q *rx_queue = NULL;
214  struct gfar_priv_tx_q *tx_queue = NULL;
215 
216  if (NULL == phydev)
217  return -ENODEV;
218  tx_queue = priv->tx_queue[0];
219  rx_queue = priv->rx_queue[0];
220 
221  /* etsec-1.7 and older versions have only one txic
222  * and rxic regs although they support multiple queues */
223  cmd->maxtxpkt = get_icft_value(tx_queue->txic);
224  cmd->maxrxpkt = get_icft_value(rx_queue->rxic);
225 
226  return phy_ethtool_gset(phydev, cmd);
227 }
228 
229 /* Return the length of the register structure */
230 static int gfar_reglen(struct net_device *dev)
231 {
232  return sizeof (struct gfar);
233 }
234 
235 /* Return a dump of the GFAR register space */
236 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs,
237  void *regbuf)
238 {
239  int i;
240  struct gfar_private *priv = netdev_priv(dev);
241  u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp[0].regs;
242  u32 *buf = (u32 *) regbuf;
243 
244  for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
245  buf[i] = gfar_read(&theregs[i]);
246 }
247 
248 /* Convert microseconds to ethernet clock ticks, which changes
249  * depending on what speed the controller is running at */
250 static unsigned int gfar_usecs2ticks(struct gfar_private *priv,
251  unsigned int usecs)
252 {
253  unsigned int count;
254 
255  /* The timer is different, depending on the interface speed */
256  switch (priv->phydev->speed) {
257  case SPEED_1000:
258  count = GFAR_GBIT_TIME;
259  break;
260  case SPEED_100:
261  count = GFAR_100_TIME;
262  break;
263  case SPEED_10:
264  default:
265  count = GFAR_10_TIME;
266  break;
267  }
268 
269  /* Make sure we return a number greater than 0
270  * if usecs > 0 */
271  return (usecs * 1000 + count - 1) / count;
272 }
273 
274 /* Convert ethernet clock ticks to microseconds */
275 static unsigned int gfar_ticks2usecs(struct gfar_private *priv,
276  unsigned int ticks)
277 {
278  unsigned int count;
279 
280  /* The timer is different, depending on the interface speed */
281  switch (priv->phydev->speed) {
282  case SPEED_1000:
283  count = GFAR_GBIT_TIME;
284  break;
285  case SPEED_100:
286  count = GFAR_100_TIME;
287  break;
288  case SPEED_10:
289  default:
290  count = GFAR_10_TIME;
291  break;
292  }
293 
294  /* Make sure we return a number greater than 0 */
295  /* if ticks is > 0 */
296  return (ticks * count) / 1000;
297 }
298 
299 /* Get the coalescing parameters, and put them in the cvals
300  * structure. */
301 static int gfar_gcoalesce(struct net_device *dev,
302  struct ethtool_coalesce *cvals)
303 {
304  struct gfar_private *priv = netdev_priv(dev);
305  struct gfar_priv_rx_q *rx_queue = NULL;
306  struct gfar_priv_tx_q *tx_queue = NULL;
307  unsigned long rxtime;
308  unsigned long rxcount;
309  unsigned long txtime;
310  unsigned long txcount;
311 
312  if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
313  return -EOPNOTSUPP;
314 
315  if (NULL == priv->phydev)
316  return -ENODEV;
317 
318  rx_queue = priv->rx_queue[0];
319  tx_queue = priv->tx_queue[0];
320 
321  rxtime = get_ictt_value(rx_queue->rxic);
322  rxcount = get_icft_value(rx_queue->rxic);
323  txtime = get_ictt_value(tx_queue->txic);
324  txcount = get_icft_value(tx_queue->txic);
325  cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, rxtime);
326  cvals->rx_max_coalesced_frames = rxcount;
327 
328  cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, txtime);
329  cvals->tx_max_coalesced_frames = txcount;
330 
331  cvals->use_adaptive_rx_coalesce = 0;
332  cvals->use_adaptive_tx_coalesce = 0;
333 
334  cvals->pkt_rate_low = 0;
335  cvals->rx_coalesce_usecs_low = 0;
336  cvals->rx_max_coalesced_frames_low = 0;
337  cvals->tx_coalesce_usecs_low = 0;
338  cvals->tx_max_coalesced_frames_low = 0;
339 
340  /* When the packet rate is below pkt_rate_high but above
341  * pkt_rate_low (both measured in packets per second) the
342  * normal {rx,tx}_* coalescing parameters are used.
343  */
344 
345  /* When the packet rate is (measured in packets per second)
346  * is above pkt_rate_high, the {rx,tx}_*_high parameters are
347  * used.
348  */
349  cvals->pkt_rate_high = 0;
350  cvals->rx_coalesce_usecs_high = 0;
351  cvals->rx_max_coalesced_frames_high = 0;
352  cvals->tx_coalesce_usecs_high = 0;
353  cvals->tx_max_coalesced_frames_high = 0;
354 
355  /* How often to do adaptive coalescing packet rate sampling,
356  * measured in seconds. Must not be zero.
357  */
358  cvals->rate_sample_interval = 0;
359 
360  return 0;
361 }
362 
363 /* Change the coalescing values.
364  * Both cvals->*_usecs and cvals->*_frames have to be > 0
365  * in order for coalescing to be active
366  */
367 static int gfar_scoalesce(struct net_device *dev,
368  struct ethtool_coalesce *cvals)
369 {
370  struct gfar_private *priv = netdev_priv(dev);
371  int i = 0;
372 
373  if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
374  return -EOPNOTSUPP;
375 
376  /* Set up rx coalescing */
377  /* As of now, we will enable/disable coalescing for all
378  * queues together in case of eTSEC2, this will be modified
379  * along with the ethtool interface
380  */
381  if ((cvals->rx_coalesce_usecs == 0) ||
382  (cvals->rx_max_coalesced_frames == 0)) {
383  for (i = 0; i < priv->num_rx_queues; i++)
384  priv->rx_queue[i]->rxcoalescing = 0;
385  } else {
386  for (i = 0; i < priv->num_rx_queues; i++)
387  priv->rx_queue[i]->rxcoalescing = 1;
388  }
389 
390  if (NULL == priv->phydev)
391  return -ENODEV;
392 
393  /* Check the bounds of the values */
394  if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
395  pr_info("Coalescing is limited to %d microseconds\n",
396  GFAR_MAX_COAL_USECS);
397  return -EINVAL;
398  }
399 
400  if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
401  pr_info("Coalescing is limited to %d frames\n",
402  GFAR_MAX_COAL_FRAMES);
403  return -EINVAL;
404  }
405 
406  for (i = 0; i < priv->num_rx_queues; i++) {
407  priv->rx_queue[i]->rxic = mk_ic_value(
408  cvals->rx_max_coalesced_frames,
409  gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
410  }
411 
412  /* Set up tx coalescing */
413  if ((cvals->tx_coalesce_usecs == 0) ||
414  (cvals->tx_max_coalesced_frames == 0)) {
415  for (i = 0; i < priv->num_tx_queues; i++)
416  priv->tx_queue[i]->txcoalescing = 0;
417  } else {
418  for (i = 0; i < priv->num_tx_queues; i++)
419  priv->tx_queue[i]->txcoalescing = 1;
420  }
421 
422  /* Check the bounds of the values */
423  if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
424  pr_info("Coalescing is limited to %d microseconds\n",
425  GFAR_MAX_COAL_USECS);
426  return -EINVAL;
427  }
428 
429  if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
430  pr_info("Coalescing is limited to %d frames\n",
431  GFAR_MAX_COAL_FRAMES);
432  return -EINVAL;
433  }
434 
435  for (i = 0; i < priv->num_tx_queues; i++) {
436  priv->tx_queue[i]->txic = mk_ic_value(
437  cvals->tx_max_coalesced_frames,
438  gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
439  }
440 
441  gfar_configure_coalescing(priv, 0xFF, 0xFF);
442 
443  return 0;
444 }
445 
446 /* Fills in rvals with the current ring parameters. Currently,
447  * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
448  * jumbo are ignored by the driver */
449 static void gfar_gringparam(struct net_device *dev,
450  struct ethtool_ringparam *rvals)
451 {
452  struct gfar_private *priv = netdev_priv(dev);
453  struct gfar_priv_tx_q *tx_queue = NULL;
454  struct gfar_priv_rx_q *rx_queue = NULL;
455 
456  tx_queue = priv->tx_queue[0];
457  rx_queue = priv->rx_queue[0];
458 
459  rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
460  rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
461  rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
462  rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
463 
464  /* Values changeable by the user. The valid values are
465  * in the range 1 to the "*_max_pending" counterpart above.
466  */
467  rvals->rx_pending = rx_queue->rx_ring_size;
468  rvals->rx_mini_pending = rx_queue->rx_ring_size;
469  rvals->rx_jumbo_pending = rx_queue->rx_ring_size;
470  rvals->tx_pending = tx_queue->tx_ring_size;
471 }
472 
473 /* Change the current ring parameters, stopping the controller if
474  * necessary so that we don't mess things up while we're in
475  * motion. We wait for the ring to be clean before reallocating
476  * the rings.
477  */
478 static int gfar_sringparam(struct net_device *dev,
479  struct ethtool_ringparam *rvals)
480 {
481  struct gfar_private *priv = netdev_priv(dev);
482  int err = 0, i = 0;
483 
484  if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
485  return -EINVAL;
486 
487  if (!is_power_of_2(rvals->rx_pending)) {
488  netdev_err(dev, "Ring sizes must be a power of 2\n");
489  return -EINVAL;
490  }
491 
492  if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
493  return -EINVAL;
494 
495  if (!is_power_of_2(rvals->tx_pending)) {
496  netdev_err(dev, "Ring sizes must be a power of 2\n");
497  return -EINVAL;
498  }
499 
500 
501  if (dev->flags & IFF_UP) {
502  unsigned long flags;
503 
504  /* Halt TX and RX, and process the frames which
505  * have already been received
506  */
507  local_irq_save(flags);
508  lock_tx_qs(priv);
509  lock_rx_qs(priv);
510 
511  gfar_halt(dev);
512 
513  unlock_rx_qs(priv);
514  unlock_tx_qs(priv);
515  local_irq_restore(flags);
516 
517  for (i = 0; i < priv->num_rx_queues; i++)
518  gfar_clean_rx_ring(priv->rx_queue[i],
519  priv->rx_queue[i]->rx_ring_size);
520 
521  /* Now we take down the rings to rebuild them */
522  stop_gfar(dev);
523  }
524 
525  /* Change the size */
526  for (i = 0; i < priv->num_rx_queues; i++) {
527  priv->rx_queue[i]->rx_ring_size = rvals->rx_pending;
528  priv->tx_queue[i]->tx_ring_size = rvals->tx_pending;
529  priv->tx_queue[i]->num_txbdfree =
530  priv->tx_queue[i]->tx_ring_size;
531  }
532 
533  /* Rebuild the rings with the new size */
534  if (dev->flags & IFF_UP) {
535  err = startup_gfar(dev);
536  netif_tx_wake_all_queues(dev);
537  }
538  return err;
539 }
540 
541 int gfar_set_features(struct net_device *dev, netdev_features_t features)
542 {
543  struct gfar_private *priv = netdev_priv(dev);
544  unsigned long flags;
545  int err = 0, i = 0;
546  netdev_features_t changed = dev->features ^ features;
547 
548  if (changed & (NETIF_F_HW_VLAN_TX|NETIF_F_HW_VLAN_RX))
549  gfar_vlan_mode(dev, features);
550 
551  if (!(changed & NETIF_F_RXCSUM))
552  return 0;
553 
554  if (dev->flags & IFF_UP) {
555  /* Halt TX and RX, and process the frames which
556  * have already been received
557  */
558  local_irq_save(flags);
559  lock_tx_qs(priv);
560  lock_rx_qs(priv);
561 
562  gfar_halt(dev);
563 
564  unlock_tx_qs(priv);
565  unlock_rx_qs(priv);
566  local_irq_restore(flags);
567 
568  for (i = 0; i < priv->num_rx_queues; i++)
569  gfar_clean_rx_ring(priv->rx_queue[i],
570  priv->rx_queue[i]->rx_ring_size);
571 
572  /* Now we take down the rings to rebuild them */
573  stop_gfar(dev);
574 
575  dev->features = features;
576 
577  err = startup_gfar(dev);
578  netif_tx_wake_all_queues(dev);
579  }
580  return err;
581 }
582 
583 static uint32_t gfar_get_msglevel(struct net_device *dev)
584 {
585  struct gfar_private *priv = netdev_priv(dev);
586 
587  return priv->msg_enable;
588 }
589 
590 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
591 {
592  struct gfar_private *priv = netdev_priv(dev);
593 
594  priv->msg_enable = data;
595 }
596 
597 #ifdef CONFIG_PM
598 static void gfar_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
599 {
600  struct gfar_private *priv = netdev_priv(dev);
601 
602  if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) {
603  wol->supported = WAKE_MAGIC;
604  wol->wolopts = priv->wol_en ? WAKE_MAGIC : 0;
605  } else {
606  wol->supported = wol->wolopts = 0;
607  }
608 }
609 
610 static int gfar_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
611 {
612  struct gfar_private *priv = netdev_priv(dev);
613  unsigned long flags;
614 
615  if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
616  wol->wolopts != 0)
617  return -EINVAL;
618 
619  if (wol->wolopts & ~WAKE_MAGIC)
620  return -EINVAL;
621 
622  device_set_wakeup_enable(&dev->dev, wol->wolopts & WAKE_MAGIC);
623 
624  spin_lock_irqsave(&priv->bflock, flags);
625  priv->wol_en = !!device_may_wakeup(&dev->dev);
626  spin_unlock_irqrestore(&priv->bflock, flags);
627 
628  return 0;
629 }
630 #endif
631 
632 static void ethflow_to_filer_rules (struct gfar_private *priv, u64 ethflow)
633 {
634  u32 fcr = 0x0, fpr = FPR_FILER_MASK;
635 
636  if (ethflow & RXH_L2DA) {
637  fcr = RQFCR_PID_DAH |RQFCR_CMP_NOMATCH |
638  RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0;
639  priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
640  priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
641  gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
642  priv->cur_filer_idx = priv->cur_filer_idx - 1;
643 
644  fcr = RQFCR_PID_DAL | RQFCR_AND | RQFCR_CMP_NOMATCH |
645  RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0;
646  priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
647  priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
648  gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
649  priv->cur_filer_idx = priv->cur_filer_idx - 1;
650  }
651 
652  if (ethflow & RXH_VLAN) {
653  fcr = RQFCR_PID_VID | RQFCR_CMP_NOMATCH | RQFCR_HASH |
654  RQFCR_AND | RQFCR_HASHTBL_0;
655  gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
656  priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
657  priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
658  priv->cur_filer_idx = priv->cur_filer_idx - 1;
659  }
660 
661  if (ethflow & RXH_IP_SRC) {
662  fcr = RQFCR_PID_SIA | RQFCR_CMP_NOMATCH | RQFCR_HASH |
663  RQFCR_AND | RQFCR_HASHTBL_0;
664  priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
665  priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
666  gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
667  priv->cur_filer_idx = priv->cur_filer_idx - 1;
668  }
669 
670  if (ethflow & (RXH_IP_DST)) {
671  fcr = RQFCR_PID_DIA | RQFCR_CMP_NOMATCH | RQFCR_HASH |
672  RQFCR_AND | RQFCR_HASHTBL_0;
673  priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
674  priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
675  gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
676  priv->cur_filer_idx = priv->cur_filer_idx - 1;
677  }
678 
679  if (ethflow & RXH_L3_PROTO) {
680  fcr = RQFCR_PID_L4P | RQFCR_CMP_NOMATCH | RQFCR_HASH |
681  RQFCR_AND | RQFCR_HASHTBL_0;
682  priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
683  priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
684  gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
685  priv->cur_filer_idx = priv->cur_filer_idx - 1;
686  }
687 
688  if (ethflow & RXH_L4_B_0_1) {
689  fcr = RQFCR_PID_SPT | RQFCR_CMP_NOMATCH | RQFCR_HASH |
690  RQFCR_AND | RQFCR_HASHTBL_0;
691  priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
692  priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
693  gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
694  priv->cur_filer_idx = priv->cur_filer_idx - 1;
695  }
696 
697  if (ethflow & RXH_L4_B_2_3) {
698  fcr = RQFCR_PID_DPT | RQFCR_CMP_NOMATCH | RQFCR_HASH |
699  RQFCR_AND | RQFCR_HASHTBL_0;
700  priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
701  priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
702  gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
703  priv->cur_filer_idx = priv->cur_filer_idx - 1;
704  }
705 }
706 
707 static int gfar_ethflow_to_filer_table(struct gfar_private *priv, u64 ethflow,
708  u64 class)
709 {
710  unsigned int last_rule_idx = priv->cur_filer_idx;
711  unsigned int cmp_rqfpr;
712  unsigned int *local_rqfpr;
713  unsigned int *local_rqfcr;
714  int i = 0x0, k = 0x0;
715  int j = MAX_FILER_IDX, l = 0x0;
716  int ret = 1;
717 
718  local_rqfpr = kmalloc(sizeof(unsigned int) * (MAX_FILER_IDX + 1),
719  GFP_KERNEL);
720  local_rqfcr = kmalloc(sizeof(unsigned int) * (MAX_FILER_IDX + 1),
721  GFP_KERNEL);
722  if (!local_rqfpr || !local_rqfcr) {
723  pr_err("Out of memory\n");
724  ret = 0;
725  goto err;
726  }
727 
728  switch (class) {
729  case TCP_V4_FLOW:
730  cmp_rqfpr = RQFPR_IPV4 |RQFPR_TCP;
731  break;
732  case UDP_V4_FLOW:
733  cmp_rqfpr = RQFPR_IPV4 |RQFPR_UDP;
734  break;
735  case TCP_V6_FLOW:
736  cmp_rqfpr = RQFPR_IPV6 |RQFPR_TCP;
737  break;
738  case UDP_V6_FLOW:
739  cmp_rqfpr = RQFPR_IPV6 |RQFPR_UDP;
740  break;
741  default:
742  pr_err("Right now this class is not supported\n");
743  ret = 0;
744  goto err;
745  }
746 
747  for (i = 0; i < MAX_FILER_IDX + 1; i++) {
748  local_rqfpr[j] = priv->ftp_rqfpr[i];
749  local_rqfcr[j] = priv->ftp_rqfcr[i];
750  j--;
751  if ((priv->ftp_rqfcr[i] ==
752  (RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND)) &&
753  (priv->ftp_rqfpr[i] == cmp_rqfpr))
754  break;
755  }
756 
757  if (i == MAX_FILER_IDX + 1) {
758  pr_err("No parse rule found, can't create hash rules\n");
759  ret = 0;
760  goto err;
761  }
762 
763  /* If a match was found, then it begins the starting of a cluster rule
764  * if it was already programmed, we need to overwrite these rules
765  */
766  for (l = i+1; l < MAX_FILER_IDX; l++) {
767  if ((priv->ftp_rqfcr[l] & RQFCR_CLE) &&
768  !(priv->ftp_rqfcr[l] & RQFCR_AND)) {
769  priv->ftp_rqfcr[l] = RQFCR_CLE | RQFCR_CMP_EXACT |
770  RQFCR_HASHTBL_0 | RQFCR_PID_MASK;
771  priv->ftp_rqfpr[l] = FPR_FILER_MASK;
772  gfar_write_filer(priv, l, priv->ftp_rqfcr[l],
773  priv->ftp_rqfpr[l]);
774  break;
775  }
776 
777  if (!(priv->ftp_rqfcr[l] & RQFCR_CLE) &&
778  (priv->ftp_rqfcr[l] & RQFCR_AND))
779  continue;
780  else {
781  local_rqfpr[j] = priv->ftp_rqfpr[l];
782  local_rqfcr[j] = priv->ftp_rqfcr[l];
783  j--;
784  }
785  }
786 
787  priv->cur_filer_idx = l - 1;
788  last_rule_idx = l;
789 
790  /* hash rules */
791  ethflow_to_filer_rules(priv, ethflow);
792 
793  /* Write back the popped out rules again */
794  for (k = j+1; k < MAX_FILER_IDX; k++) {
795  priv->ftp_rqfpr[priv->cur_filer_idx] = local_rqfpr[k];
796  priv->ftp_rqfcr[priv->cur_filer_idx] = local_rqfcr[k];
797  gfar_write_filer(priv, priv->cur_filer_idx,
798  local_rqfcr[k], local_rqfpr[k]);
799  if (!priv->cur_filer_idx)
800  break;
801  priv->cur_filer_idx = priv->cur_filer_idx - 1;
802  }
803 
804 err:
805  kfree(local_rqfcr);
806  kfree(local_rqfpr);
807  return ret;
808 }
809 
810 static int gfar_set_hash_opts(struct gfar_private *priv,
811  struct ethtool_rxnfc *cmd)
812 {
813  /* write the filer rules here */
814  if (!gfar_ethflow_to_filer_table(priv, cmd->data, cmd->flow_type))
815  return -EINVAL;
816 
817  return 0;
818 }
819 
820 static int gfar_check_filer_hardware(struct gfar_private *priv)
821 {
822  struct gfar __iomem *regs = NULL;
823  u32 i;
824 
825  regs = priv->gfargrp[0].regs;
826 
827  /* Check if we are in FIFO mode */
828  i = gfar_read(&regs->ecntrl);
829  i &= ECNTRL_FIFM;
830  if (i == ECNTRL_FIFM) {
831  netdev_notice(priv->ndev, "Interface in FIFO mode\n");
832  i = gfar_read(&regs->rctrl);
833  i &= RCTRL_PRSDEP_MASK | RCTRL_PRSFM;
834  if (i == (RCTRL_PRSDEP_MASK | RCTRL_PRSFM)) {
835  netdev_info(priv->ndev,
836  "Receive Queue Filtering enabled\n");
837  } else {
838  netdev_warn(priv->ndev,
839  "Receive Queue Filtering disabled\n");
840  return -EOPNOTSUPP;
841  }
842  }
843  /* Or in standard mode */
844  else {
845  i = gfar_read(&regs->rctrl);
846  i &= RCTRL_PRSDEP_MASK;
847  if (i == RCTRL_PRSDEP_MASK) {
848  netdev_info(priv->ndev,
849  "Receive Queue Filtering enabled\n");
850  } else {
851  netdev_warn(priv->ndev,
852  "Receive Queue Filtering disabled\n");
853  return -EOPNOTSUPP;
854  }
855  }
856 
857  /* Sets the properties for arbitrary filer rule
858  * to the first 4 Layer 4 Bytes
859  */
860  regs->rbifx = 0xC0C1C2C3;
861  return 0;
862 }
863 
864 static int gfar_comp_asc(const void *a, const void *b)
865 {
866  return memcmp(a, b, 4);
867 }
868 
869 static int gfar_comp_desc(const void *a, const void *b)
870 {
871  return -memcmp(a, b, 4);
872 }
873 
874 static void gfar_swap(void *a, void *b, int size)
875 {
876  u32 *_a = a;
877  u32 *_b = b;
878 
879  swap(_a[0], _b[0]);
880  swap(_a[1], _b[1]);
881  swap(_a[2], _b[2]);
882  swap(_a[3], _b[3]);
883 }
884 
885 /* Write a mask to filer cache */
886 static void gfar_set_mask(u32 mask, struct filer_table *tab)
887 {
888  tab->fe[tab->index].ctrl = RQFCR_AND | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
889  tab->fe[tab->index].prop = mask;
890  tab->index++;
891 }
892 
893 /* Sets parse bits (e.g. IP or TCP) */
894 static void gfar_set_parse_bits(u32 value, u32 mask, struct filer_table *tab)
895 {
896  gfar_set_mask(mask, tab);
897  tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_PID_PARSE |
898  RQFCR_AND;
899  tab->fe[tab->index].prop = value;
900  tab->index++;
901 }
902 
903 static void gfar_set_general_attribute(u32 value, u32 mask, u32 flag,
904  struct filer_table *tab)
905 {
906  gfar_set_mask(mask, tab);
907  tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_AND | flag;
908  tab->fe[tab->index].prop = value;
909  tab->index++;
910 }
911 
912 /* For setting a tuple of value and mask of type flag
913  * Example:
914  * IP-Src = 10.0.0.0/255.0.0.0
915  * value: 0x0A000000 mask: FF000000 flag: RQFPR_IPV4
916  *
917  * Ethtool gives us a value=0 and mask=~0 for don't care a tuple
918  * For a don't care mask it gives us a 0
919  *
920  * The check if don't care and the mask adjustment if mask=0 is done for VLAN
921  * and MAC stuff on an upper level (due to missing information on this level).
922  * For these guys we can discard them if they are value=0 and mask=0.
923  *
924  * Further the all masks are one-padded for better hardware efficiency.
925  */
926 static void gfar_set_attribute(u32 value, u32 mask, u32 flag,
927  struct filer_table *tab)
928 {
929  switch (flag) {
930  /* 3bit */
931  case RQFCR_PID_PRI:
932  if (!(value | mask))
933  return;
934  mask |= RQFCR_PID_PRI_MASK;
935  break;
936  /* 8bit */
937  case RQFCR_PID_L4P:
938  case RQFCR_PID_TOS:
939  if (!~(mask | RQFCR_PID_L4P_MASK))
940  return;
941  if (!mask)
942  mask = ~0;
943  else
944  mask |= RQFCR_PID_L4P_MASK;
945  break;
946  /* 12bit */
947  case RQFCR_PID_VID:
948  if (!(value | mask))
949  return;
950  mask |= RQFCR_PID_VID_MASK;
951  break;
952  /* 16bit */
953  case RQFCR_PID_DPT:
954  case RQFCR_PID_SPT:
955  case RQFCR_PID_ETY:
956  if (!~(mask | RQFCR_PID_PORT_MASK))
957  return;
958  if (!mask)
959  mask = ~0;
960  else
961  mask |= RQFCR_PID_PORT_MASK;
962  break;
963  /* 24bit */
964  case RQFCR_PID_DAH:
965  case RQFCR_PID_DAL:
966  case RQFCR_PID_SAH:
967  case RQFCR_PID_SAL:
968  if (!(value | mask))
969  return;
970  mask |= RQFCR_PID_MAC_MASK;
971  break;
972  /* for all real 32bit masks */
973  default:
974  if (!~mask)
975  return;
976  if (!mask)
977  mask = ~0;
978  break;
979  }
980  gfar_set_general_attribute(value, mask, flag, tab);
981 }
982 
983 /* Translates value and mask for UDP, TCP or SCTP */
984 static void gfar_set_basic_ip(struct ethtool_tcpip4_spec *value,
985  struct ethtool_tcpip4_spec *mask,
986  struct filer_table *tab)
987 {
988  gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
989  gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
990  gfar_set_attribute(value->pdst, mask->pdst, RQFCR_PID_DPT, tab);
991  gfar_set_attribute(value->psrc, mask->psrc, RQFCR_PID_SPT, tab);
992  gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
993 }
994 
995 /* Translates value and mask for RAW-IP4 */
996 static void gfar_set_user_ip(struct ethtool_usrip4_spec *value,
997  struct ethtool_usrip4_spec *mask,
998  struct filer_table *tab)
999 {
1000  gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
1001  gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
1002  gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
1003  gfar_set_attribute(value->proto, mask->proto, RQFCR_PID_L4P, tab);
1004  gfar_set_attribute(value->l4_4_bytes, mask->l4_4_bytes, RQFCR_PID_ARB,
1005  tab);
1006 
1007 }
1008 
1009 /* Translates value and mask for ETHER spec */
1010 static void gfar_set_ether(struct ethhdr *value, struct ethhdr *mask,
1011  struct filer_table *tab)
1012 {
1013  u32 upper_temp_mask = 0;
1014  u32 lower_temp_mask = 0;
1015 
1016  /* Source address */
1017  if (!is_broadcast_ether_addr(mask->h_source)) {
1018  if (is_zero_ether_addr(mask->h_source)) {
1019  upper_temp_mask = 0xFFFFFFFF;
1020  lower_temp_mask = 0xFFFFFFFF;
1021  } else {
1022  upper_temp_mask = mask->h_source[0] << 16 |
1023  mask->h_source[1] << 8 |
1024  mask->h_source[2];
1025  lower_temp_mask = mask->h_source[3] << 16 |
1026  mask->h_source[4] << 8 |
1027  mask->h_source[5];
1028  }
1029  /* Upper 24bit */
1030  gfar_set_attribute(value->h_source[0] << 16 |
1031  value->h_source[1] << 8 |
1032  value->h_source[2],
1033  upper_temp_mask, RQFCR_PID_SAH, tab);
1034  /* And the same for the lower part */
1035  gfar_set_attribute(value->h_source[3] << 16 |
1036  value->h_source[4] << 8 |
1037  value->h_source[5],
1038  lower_temp_mask, RQFCR_PID_SAL, tab);
1039  }
1040  /* Destination address */
1041  if (!is_broadcast_ether_addr(mask->h_dest)) {
1042  /* Special for destination is limited broadcast */
1043  if ((is_broadcast_ether_addr(value->h_dest) &&
1044  is_zero_ether_addr(mask->h_dest))) {
1045  gfar_set_parse_bits(RQFPR_EBC, RQFPR_EBC, tab);
1046  } else {
1047  if (is_zero_ether_addr(mask->h_dest)) {
1048  upper_temp_mask = 0xFFFFFFFF;
1049  lower_temp_mask = 0xFFFFFFFF;
1050  } else {
1051  upper_temp_mask = mask->h_dest[0] << 16 |
1052  mask->h_dest[1] << 8 |
1053  mask->h_dest[2];
1054  lower_temp_mask = mask->h_dest[3] << 16 |
1055  mask->h_dest[4] << 8 |
1056  mask->h_dest[5];
1057  }
1058 
1059  /* Upper 24bit */
1060  gfar_set_attribute(value->h_dest[0] << 16 |
1061  value->h_dest[1] << 8 |
1062  value->h_dest[2],
1063  upper_temp_mask, RQFCR_PID_DAH, tab);
1064  /* And the same for the lower part */
1065  gfar_set_attribute(value->h_dest[3] << 16 |
1066  value->h_dest[4] << 8 |
1067  value->h_dest[5],
1068  lower_temp_mask, RQFCR_PID_DAL, tab);
1069  }
1070  }
1071 
1072  gfar_set_attribute(value->h_proto, mask->h_proto, RQFCR_PID_ETY, tab);
1073 }
1074 
1075 /* Convert a rule to binary filter format of gianfar */
1076 static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule,
1077  struct filer_table *tab)
1078 {
1079  u32 vlan = 0, vlan_mask = 0;
1080  u32 id = 0, id_mask = 0;
1081  u32 cfi = 0, cfi_mask = 0;
1082  u32 prio = 0, prio_mask = 0;
1083  u32 old_index = tab->index;
1084 
1085  /* Check if vlan is wanted */
1086  if ((rule->flow_type & FLOW_EXT) && (rule->m_ext.vlan_tci != 0xFFFF)) {
1087  if (!rule->m_ext.vlan_tci)
1088  rule->m_ext.vlan_tci = 0xFFFF;
1089 
1090  vlan = RQFPR_VLN;
1091  vlan_mask = RQFPR_VLN;
1092 
1093  /* Separate the fields */
1094  id = rule->h_ext.vlan_tci & VLAN_VID_MASK;
1095  id_mask = rule->m_ext.vlan_tci & VLAN_VID_MASK;
1096  cfi = rule->h_ext.vlan_tci & VLAN_CFI_MASK;
1097  cfi_mask = rule->m_ext.vlan_tci & VLAN_CFI_MASK;
1098  prio = (rule->h_ext.vlan_tci & VLAN_PRIO_MASK) >>
1099  VLAN_PRIO_SHIFT;
1100  prio_mask = (rule->m_ext.vlan_tci & VLAN_PRIO_MASK) >>
1101  VLAN_PRIO_SHIFT;
1102 
1103  if (cfi == VLAN_TAG_PRESENT && cfi_mask == VLAN_TAG_PRESENT) {
1104  vlan |= RQFPR_CFI;
1105  vlan_mask |= RQFPR_CFI;
1106  } else if (cfi != VLAN_TAG_PRESENT &&
1107  cfi_mask == VLAN_TAG_PRESENT) {
1108  vlan_mask |= RQFPR_CFI;
1109  }
1110  }
1111 
1112  switch (rule->flow_type & ~FLOW_EXT) {
1113  case TCP_V4_FLOW:
1114  gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_TCP | vlan,
1115  RQFPR_IPV4 | RQFPR_TCP | vlan_mask, tab);
1116  gfar_set_basic_ip(&rule->h_u.tcp_ip4_spec,
1117  &rule->m_u.tcp_ip4_spec, tab);
1118  break;
1119  case UDP_V4_FLOW:
1120  gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_UDP | vlan,
1121  RQFPR_IPV4 | RQFPR_UDP | vlan_mask, tab);
1122  gfar_set_basic_ip(&rule->h_u.udp_ip4_spec,
1123  &rule->m_u.udp_ip4_spec, tab);
1124  break;
1125  case SCTP_V4_FLOW:
1126  gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1127  tab);
1128  gfar_set_attribute(132, 0, RQFCR_PID_L4P, tab);
1129  gfar_set_basic_ip((struct ethtool_tcpip4_spec *)&rule->h_u,
1130  (struct ethtool_tcpip4_spec *)&rule->m_u,
1131  tab);
1132  break;
1133  case IP_USER_FLOW:
1134  gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1135  tab);
1136  gfar_set_user_ip((struct ethtool_usrip4_spec *) &rule->h_u,
1137  (struct ethtool_usrip4_spec *) &rule->m_u,
1138  tab);
1139  break;
1140  case ETHER_FLOW:
1141  if (vlan)
1142  gfar_set_parse_bits(vlan, vlan_mask, tab);
1143  gfar_set_ether((struct ethhdr *) &rule->h_u,
1144  (struct ethhdr *) &rule->m_u, tab);
1145  break;
1146  default:
1147  return -1;
1148  }
1149 
1150  /* Set the vlan attributes in the end */
1151  if (vlan) {
1152  gfar_set_attribute(id, id_mask, RQFCR_PID_VID, tab);
1153  gfar_set_attribute(prio, prio_mask, RQFCR_PID_PRI, tab);
1154  }
1155 
1156  /* If there has been nothing written till now, it must be a default */
1157  if (tab->index == old_index) {
1158  gfar_set_mask(0xFFFFFFFF, tab);
1159  tab->fe[tab->index].ctrl = 0x20;
1160  tab->fe[tab->index].prop = 0x0;
1161  tab->index++;
1162  }
1163 
1164  /* Remove last AND */
1165  tab->fe[tab->index - 1].ctrl &= (~RQFCR_AND);
1166 
1167  /* Specify which queue to use or to drop */
1168  if (rule->ring_cookie == RX_CLS_FLOW_DISC)
1169  tab->fe[tab->index - 1].ctrl |= RQFCR_RJE;
1170  else
1171  tab->fe[tab->index - 1].ctrl |= (rule->ring_cookie << 10);
1172 
1173  /* Only big enough entries can be clustered */
1174  if (tab->index > (old_index + 2)) {
1175  tab->fe[old_index + 1].ctrl |= RQFCR_CLE;
1176  tab->fe[tab->index - 1].ctrl |= RQFCR_CLE;
1177  }
1178 
1179  /* In rare cases the cache can be full while there is
1180  * free space in hw
1181  */
1182  if (tab->index > MAX_FILER_CACHE_IDX - 1)
1183  return -EBUSY;
1184 
1185  return 0;
1186 }
1187 
1188 /* Copy size filer entries */
1189 static void gfar_copy_filer_entries(struct gfar_filer_entry dst[0],
1190  struct gfar_filer_entry src[0], s32 size)
1191 {
1192  while (size > 0) {
1193  size--;
1194  dst[size].ctrl = src[size].ctrl;
1195  dst[size].prop = src[size].prop;
1196  }
1197 }
1198 
1199 /* Delete the contents of the filer-table between start and end
1200  * and collapse them
1201  */
1202 static int gfar_trim_filer_entries(u32 begin, u32 end, struct filer_table *tab)
1203 {
1204  int length;
1205 
1206  if (end > MAX_FILER_CACHE_IDX || end < begin)
1207  return -EINVAL;
1208 
1209  end++;
1210  length = end - begin;
1211 
1212  /* Copy */
1213  while (end < tab->index) {
1214  tab->fe[begin].ctrl = tab->fe[end].ctrl;
1215  tab->fe[begin++].prop = tab->fe[end++].prop;
1216 
1217  }
1218  /* Fill up with don't cares */
1219  while (begin < tab->index) {
1220  tab->fe[begin].ctrl = 0x60;
1221  tab->fe[begin].prop = 0xFFFFFFFF;
1222  begin++;
1223  }
1224 
1225  tab->index -= length;
1226  return 0;
1227 }
1228 
1229 /* Make space on the wanted location */
1230 static int gfar_expand_filer_entries(u32 begin, u32 length,
1231  struct filer_table *tab)
1232 {
1233  if (length == 0 || length + tab->index > MAX_FILER_CACHE_IDX ||
1234  begin > MAX_FILER_CACHE_IDX)
1235  return -EINVAL;
1236 
1237  gfar_copy_filer_entries(&(tab->fe[begin + length]), &(tab->fe[begin]),
1238  tab->index - length + 1);
1239 
1240  tab->index += length;
1241  return 0;
1242 }
1243 
1244 static int gfar_get_next_cluster_start(int start, struct filer_table *tab)
1245 {
1246  for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1);
1247  start++) {
1248  if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE)) ==
1249  (RQFCR_AND | RQFCR_CLE))
1250  return start;
1251  }
1252  return -1;
1253 }
1254 
1255 static int gfar_get_next_cluster_end(int start, struct filer_table *tab)
1256 {
1257  for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1);
1258  start++) {
1259  if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE)) ==
1260  (RQFCR_CLE))
1261  return start;
1262  }
1263  return -1;
1264 }
1265 
1266 /* Uses hardwares clustering option to reduce
1267  * the number of filer table entries
1268  */
1269 static void gfar_cluster_filer(struct filer_table *tab)
1270 {
1271  s32 i = -1, j, iend, jend;
1272 
1273  while ((i = gfar_get_next_cluster_start(++i, tab)) != -1) {
1274  j = i;
1275  while ((j = gfar_get_next_cluster_start(++j, tab)) != -1) {
1276  /* The cluster entries self and the previous one
1277  * (a mask) must be identical!
1278  */
1279  if (tab->fe[i].ctrl != tab->fe[j].ctrl)
1280  break;
1281  if (tab->fe[i].prop != tab->fe[j].prop)
1282  break;
1283  if (tab->fe[i - 1].ctrl != tab->fe[j - 1].ctrl)
1284  break;
1285  if (tab->fe[i - 1].prop != tab->fe[j - 1].prop)
1286  break;
1287  iend = gfar_get_next_cluster_end(i, tab);
1288  jend = gfar_get_next_cluster_end(j, tab);
1289  if (jend == -1 || iend == -1)
1290  break;
1291 
1292  /* First we make some free space, where our cluster
1293  * element should be. Then we copy it there and finally
1294  * delete in from its old location.
1295  */
1296  if (gfar_expand_filer_entries(iend, (jend - j), tab) ==
1297  -EINVAL)
1298  break;
1299 
1300  gfar_copy_filer_entries(&(tab->fe[iend + 1]),
1301  &(tab->fe[jend + 1]), jend - j);
1302 
1303  if (gfar_trim_filer_entries(jend - 1,
1304  jend + (jend - j),
1305  tab) == -EINVAL)
1306  return;
1307 
1308  /* Mask out cluster bit */
1309  tab->fe[iend].ctrl &= ~(RQFCR_CLE);
1310  }
1311  }
1312 }
1313 
1314 /* Swaps the masked bits of a1<>a2 and b1<>b2 */
1315 static void gfar_swap_bits(struct gfar_filer_entry *a1,
1316  struct gfar_filer_entry *a2,
1317  struct gfar_filer_entry *b1,
1318  struct gfar_filer_entry *b2, u32 mask)
1319 {
1320  u32 temp[4];
1321  temp[0] = a1->ctrl & mask;
1322  temp[1] = a2->ctrl & mask;
1323  temp[2] = b1->ctrl & mask;
1324  temp[3] = b2->ctrl & mask;
1325 
1326  a1->ctrl &= ~mask;
1327  a2->ctrl &= ~mask;
1328  b1->ctrl &= ~mask;
1329  b2->ctrl &= ~mask;
1330 
1331  a1->ctrl |= temp[1];
1332  a2->ctrl |= temp[0];
1333  b1->ctrl |= temp[3];
1334  b2->ctrl |= temp[2];
1335 }
1336 
1337 /* Generate a list consisting of masks values with their start and
1338  * end of validity and block as indicator for parts belonging
1339  * together (glued by ANDs) in mask_table
1340  */
1341 static u32 gfar_generate_mask_table(struct gfar_mask_entry *mask_table,
1342  struct filer_table *tab)
1343 {
1344  u32 i, and_index = 0, block_index = 1;
1345 
1346  for (i = 0; i < tab->index; i++) {
1347 
1348  /* LSByte of control = 0 sets a mask */
1349  if (!(tab->fe[i].ctrl & 0xF)) {
1350  mask_table[and_index].mask = tab->fe[i].prop;
1351  mask_table[and_index].start = i;
1352  mask_table[and_index].block = block_index;
1353  if (and_index >= 1)
1354  mask_table[and_index - 1].end = i - 1;
1355  and_index++;
1356  }
1357  /* cluster starts and ends will be separated because they should
1358  * hold their position
1359  */
1360  if (tab->fe[i].ctrl & RQFCR_CLE)
1361  block_index++;
1362  /* A not set AND indicates the end of a depended block */
1363  if (!(tab->fe[i].ctrl & RQFCR_AND))
1364  block_index++;
1365  }
1366 
1367  mask_table[and_index - 1].end = i - 1;
1368 
1369  return and_index;
1370 }
1371 
1372 /* Sorts the entries of mask_table by the values of the masks.
1373  * Important: The 0xFF80 flags of the first and last entry of a
1374  * block must hold their position (which queue, CLusterEnable, ReJEct,
1375  * AND)
1376  */
1377 static void gfar_sort_mask_table(struct gfar_mask_entry *mask_table,
1378  struct filer_table *temp_table, u32 and_index)
1379 {
1380  /* Pointer to compare function (_asc or _desc) */
1381  int (*gfar_comp)(const void *, const void *);
1382 
1383  u32 i, size = 0, start = 0, prev = 1;
1384  u32 old_first, old_last, new_first, new_last;
1385 
1386  gfar_comp = &gfar_comp_desc;
1387 
1388  for (i = 0; i < and_index; i++) {
1389  if (prev != mask_table[i].block) {
1390  old_first = mask_table[start].start + 1;
1391  old_last = mask_table[i - 1].end;
1392  sort(mask_table + start, size,
1393  sizeof(struct gfar_mask_entry),
1394  gfar_comp, &gfar_swap);
1395 
1396  /* Toggle order for every block. This makes the
1397  * thing more efficient!
1398  */
1399  if (gfar_comp == gfar_comp_desc)
1400  gfar_comp = &gfar_comp_asc;
1401  else
1402  gfar_comp = &gfar_comp_desc;
1403 
1404  new_first = mask_table[start].start + 1;
1405  new_last = mask_table[i - 1].end;
1406 
1407  gfar_swap_bits(&temp_table->fe[new_first],
1408  &temp_table->fe[old_first],
1409  &temp_table->fe[new_last],
1410  &temp_table->fe[old_last],
1411  RQFCR_QUEUE | RQFCR_CLE |
1412  RQFCR_RJE | RQFCR_AND);
1413 
1414  start = i;
1415  size = 0;
1416  }
1417  size++;
1418  prev = mask_table[i].block;
1419  }
1420 }
1421 
1422 /* Reduces the number of masks needed in the filer table to save entries
1423  * This is done by sorting the masks of a depended block. A depended block is
1424  * identified by gluing ANDs or CLE. The sorting order toggles after every
1425  * block. Of course entries in scope of a mask must change their location with
1426  * it.
1427  */
1428 static int gfar_optimize_filer_masks(struct filer_table *tab)
1429 {
1430  struct filer_table *temp_table;
1431  struct gfar_mask_entry *mask_table;
1432 
1433  u32 and_index = 0, previous_mask = 0, i = 0, j = 0, size = 0;
1434  s32 ret = 0;
1435 
1436  /* We need a copy of the filer table because
1437  * we want to change its order
1438  */
1439  temp_table = kmemdup(tab, sizeof(*temp_table), GFP_KERNEL);
1440  if (temp_table == NULL)
1441  return -ENOMEM;
1442 
1443  mask_table = kcalloc(MAX_FILER_CACHE_IDX / 2 + 1,
1444  sizeof(struct gfar_mask_entry), GFP_KERNEL);
1445 
1446  if (mask_table == NULL) {
1447  ret = -ENOMEM;
1448  goto end;
1449  }
1450 
1451  and_index = gfar_generate_mask_table(mask_table, tab);
1452 
1453  gfar_sort_mask_table(mask_table, temp_table, and_index);
1454 
1455  /* Now we can copy the data from our duplicated filer table to
1456  * the real one in the order the mask table says
1457  */
1458  for (i = 0; i < and_index; i++) {
1459  size = mask_table[i].end - mask_table[i].start + 1;
1460  gfar_copy_filer_entries(&(tab->fe[j]),
1461  &(temp_table->fe[mask_table[i].start]), size);
1462  j += size;
1463  }
1464 
1465  /* And finally we just have to check for duplicated masks and drop the
1466  * second ones
1467  */
1468  for (i = 0; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1469  if (tab->fe[i].ctrl == 0x80) {
1470  previous_mask = i++;
1471  break;
1472  }
1473  }
1474  for (; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1475  if (tab->fe[i].ctrl == 0x80) {
1476  if (tab->fe[i].prop == tab->fe[previous_mask].prop) {
1477  /* Two identical ones found!
1478  * So drop the second one!
1479  */
1480  gfar_trim_filer_entries(i, i, tab);
1481  } else
1482  /* Not identical! */
1483  previous_mask = i;
1484  }
1485  }
1486 
1487  kfree(mask_table);
1488 end: kfree(temp_table);
1489  return ret;
1490 }
1491 
1492 /* Write the bit-pattern from software's buffer to hardware registers */
1493 static int gfar_write_filer_table(struct gfar_private *priv,
1494  struct filer_table *tab)
1495 {
1496  u32 i = 0;
1497  if (tab->index > MAX_FILER_IDX - 1)
1498  return -EBUSY;
1499 
1500  /* Avoid inconsistent filer table to be processed */
1501  lock_rx_qs(priv);
1502 
1503  /* Fill regular entries */
1504  for (; i < MAX_FILER_IDX - 1 && (tab->fe[i].ctrl | tab->fe[i].ctrl);
1505  i++)
1506  gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
1507  /* Fill the rest with fall-troughs */
1508  for (; i < MAX_FILER_IDX - 1; i++)
1509  gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
1510  /* Last entry must be default accept
1511  * because that's what people expect
1512  */
1513  gfar_write_filer(priv, i, 0x20, 0x0);
1514 
1515  unlock_rx_qs(priv);
1516 
1517  return 0;
1518 }
1519 
1520 static int gfar_check_capability(struct ethtool_rx_flow_spec *flow,
1521  struct gfar_private *priv)
1522 {
1523 
1524  if (flow->flow_type & FLOW_EXT) {
1525  if (~flow->m_ext.data[0] || ~flow->m_ext.data[1])
1526  netdev_warn(priv->ndev,
1527  "User-specific data not supported!\n");
1528  if (~flow->m_ext.vlan_etype)
1529  netdev_warn(priv->ndev,
1530  "VLAN-etype not supported!\n");
1531  }
1532  if (flow->flow_type == IP_USER_FLOW)
1533  if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
1534  netdev_warn(priv->ndev,
1535  "IP-Version differing from IPv4 not supported!\n");
1536 
1537  return 0;
1538 }
1539 
1540 static int gfar_process_filer_changes(struct gfar_private *priv)
1541 {
1542  struct ethtool_flow_spec_container *j;
1543  struct filer_table *tab;
1544  s32 i = 0;
1545  s32 ret = 0;
1546 
1547  /* So index is set to zero, too! */
1548  tab = kzalloc(sizeof(*tab), GFP_KERNEL);
1549  if (tab == NULL)
1550  return -ENOMEM;
1551 
1552  /* Now convert the existing filer data from flow_spec into
1553  * filer tables binary format
1554  */
1555  list_for_each_entry(j, &priv->rx_list.list, list) {
1556  ret = gfar_convert_to_filer(&j->fs, tab);
1557  if (ret == -EBUSY) {
1558  netdev_err(priv->ndev,
1559  "Rule not added: No free space!\n");
1560  goto end;
1561  }
1562  if (ret == -1) {
1563  netdev_err(priv->ndev,
1564  "Rule not added: Unsupported Flow-type!\n");
1565  goto end;
1566  }
1567  }
1568 
1569  i = tab->index;
1570 
1571  /* Optimizations to save entries */
1572  gfar_cluster_filer(tab);
1573  gfar_optimize_filer_masks(tab);
1574 
1575  pr_debug("\n\tSummary:\n"
1576  "\tData on hardware: %d\n"
1577  "\tCompression rate: %d%%\n",
1578  tab->index, 100 - (100 * tab->index) / i);
1579 
1580  /* Write everything to hardware */
1581  ret = gfar_write_filer_table(priv, tab);
1582  if (ret == -EBUSY) {
1583  netdev_err(priv->ndev, "Rule not added: No free space!\n");
1584  goto end;
1585  }
1586 
1587 end:
1588  kfree(tab);
1589  return ret;
1590 }
1591 
1592 static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow)
1593 {
1594  u32 i = 0;
1595 
1596  for (i = 0; i < sizeof(flow->m_u); i++)
1597  flow->m_u.hdata[i] ^= 0xFF;
1598 
1599  flow->m_ext.vlan_etype ^= 0xFFFF;
1600  flow->m_ext.vlan_tci ^= 0xFFFF;
1601  flow->m_ext.data[0] ^= ~0;
1602  flow->m_ext.data[1] ^= ~0;
1603 }
1604 
1605 static int gfar_add_cls(struct gfar_private *priv,
1606  struct ethtool_rx_flow_spec *flow)
1607 {
1608  struct ethtool_flow_spec_container *temp, *comp;
1609  int ret = 0;
1610 
1611  temp = kmalloc(sizeof(*temp), GFP_KERNEL);
1612  if (temp == NULL)
1613  return -ENOMEM;
1614  memcpy(&temp->fs, flow, sizeof(temp->fs));
1615 
1616  gfar_invert_masks(&temp->fs);
1617  ret = gfar_check_capability(&temp->fs, priv);
1618  if (ret)
1619  goto clean_mem;
1620  /* Link in the new element at the right @location */
1621  if (list_empty(&priv->rx_list.list)) {
1622  ret = gfar_check_filer_hardware(priv);
1623  if (ret != 0)
1624  goto clean_mem;
1625  list_add(&temp->list, &priv->rx_list.list);
1626  goto process;
1627  } else {
1628  list_for_each_entry(comp, &priv->rx_list.list, list) {
1629  if (comp->fs.location > flow->location) {
1630  list_add_tail(&temp->list, &comp->list);
1631  goto process;
1632  }
1633  if (comp->fs.location == flow->location) {
1634  netdev_err(priv->ndev,
1635  "Rule not added: ID %d not free!\n",
1636  flow->location);
1637  ret = -EBUSY;
1638  goto clean_mem;
1639  }
1640  }
1641  list_add_tail(&temp->list, &priv->rx_list.list);
1642  }
1643 
1644 process:
1645  ret = gfar_process_filer_changes(priv);
1646  if (ret)
1647  goto clean_list;
1648  priv->rx_list.count++;
1649  return ret;
1650 
1651 clean_list:
1652  list_del(&temp->list);
1653 clean_mem:
1654  kfree(temp);
1655  return ret;
1656 }
1657 
1658 static int gfar_del_cls(struct gfar_private *priv, u32 loc)
1659 {
1660  struct ethtool_flow_spec_container *comp;
1661  u32 ret = -EINVAL;
1662 
1663  if (list_empty(&priv->rx_list.list))
1664  return ret;
1665 
1666  list_for_each_entry(comp, &priv->rx_list.list, list) {
1667  if (comp->fs.location == loc) {
1668  list_del(&comp->list);
1669  kfree(comp);
1670  priv->rx_list.count--;
1671  gfar_process_filer_changes(priv);
1672  ret = 0;
1673  break;
1674  }
1675  }
1676 
1677  return ret;
1678 }
1679 
1680 static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
1681 {
1682  struct ethtool_flow_spec_container *comp;
1683  u32 ret = -EINVAL;
1684 
1685  list_for_each_entry(comp, &priv->rx_list.list, list) {
1686  if (comp->fs.location == cmd->fs.location) {
1687  memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs));
1688  gfar_invert_masks(&cmd->fs);
1689  ret = 0;
1690  break;
1691  }
1692  }
1693 
1694  return ret;
1695 }
1696 
1697 static int gfar_get_cls_all(struct gfar_private *priv,
1698  struct ethtool_rxnfc *cmd, u32 *rule_locs)
1699 {
1700  struct ethtool_flow_spec_container *comp;
1701  u32 i = 0;
1702 
1703  list_for_each_entry(comp, &priv->rx_list.list, list) {
1704  if (i == cmd->rule_cnt)
1705  return -EMSGSIZE;
1706  rule_locs[i] = comp->fs.location;
1707  i++;
1708  }
1709 
1710  cmd->data = MAX_FILER_IDX;
1711  cmd->rule_cnt = i;
1712 
1713  return 0;
1714 }
1715 
1716 static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
1717 {
1718  struct gfar_private *priv = netdev_priv(dev);
1719  int ret = 0;
1720 
1721  mutex_lock(&priv->rx_queue_access);
1722 
1723  switch (cmd->cmd) {
1724  case ETHTOOL_SRXFH:
1725  ret = gfar_set_hash_opts(priv, cmd);
1726  break;
1727  case ETHTOOL_SRXCLSRLINS:
1728  if ((cmd->fs.ring_cookie != RX_CLS_FLOW_DISC &&
1729  cmd->fs.ring_cookie >= priv->num_rx_queues) ||
1730  cmd->fs.location >= MAX_FILER_IDX) {
1731  ret = -EINVAL;
1732  break;
1733  }
1734  ret = gfar_add_cls(priv, &cmd->fs);
1735  break;
1736  case ETHTOOL_SRXCLSRLDEL:
1737  ret = gfar_del_cls(priv, cmd->fs.location);
1738  break;
1739  default:
1740  ret = -EINVAL;
1741  }
1742 
1743  mutex_unlock(&priv->rx_queue_access);
1744 
1745  return ret;
1746 }
1747 
1748 static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
1749  u32 *rule_locs)
1750 {
1751  struct gfar_private *priv = netdev_priv(dev);
1752  int ret = 0;
1753 
1754  switch (cmd->cmd) {
1755  case ETHTOOL_GRXRINGS:
1756  cmd->data = priv->num_rx_queues;
1757  break;
1758  case ETHTOOL_GRXCLSRLCNT:
1759  cmd->rule_cnt = priv->rx_list.count;
1760  break;
1761  case ETHTOOL_GRXCLSRULE:
1762  ret = gfar_get_cls(priv, cmd);
1763  break;
1764  case ETHTOOL_GRXCLSRLALL:
1765  ret = gfar_get_cls_all(priv, cmd, rule_locs);
1766  break;
1767  default:
1768  ret = -EINVAL;
1769  break;
1770  }
1771 
1772  return ret;
1773 }
1774 
1775 int gfar_phc_index = -1;
1776 EXPORT_SYMBOL(gfar_phc_index);
1777 
1778 static int gfar_get_ts_info(struct net_device *dev,
1779  struct ethtool_ts_info *info)
1780 {
1781  struct gfar_private *priv = netdev_priv(dev);
1782 
1783  if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) {
1784  info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
1785  SOF_TIMESTAMPING_SOFTWARE;
1786  info->phc_index = -1;
1787  return 0;
1788  }
1789  info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
1790  SOF_TIMESTAMPING_RX_HARDWARE |
1791  SOF_TIMESTAMPING_RAW_HARDWARE;
1792  info->phc_index = gfar_phc_index;
1793  info->tx_types = (1 << HWTSTAMP_TX_OFF) |
1794  (1 << HWTSTAMP_TX_ON);
1795  info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
1796  (1 << HWTSTAMP_FILTER_ALL);
1797  return 0;
1798 }
1799 
1800 const struct ethtool_ops gfar_ethtool_ops = {
1801  .get_settings = gfar_gsettings,
1802  .set_settings = gfar_ssettings,
1803  .get_drvinfo = gfar_gdrvinfo,
1804  .get_regs_len = gfar_reglen,
1805  .get_regs = gfar_get_regs,
1806  .get_link = ethtool_op_get_link,
1807  .get_coalesce = gfar_gcoalesce,
1808  .set_coalesce = gfar_scoalesce,
1809  .get_ringparam = gfar_gringparam,
1810  .set_ringparam = gfar_sringparam,
1811  .get_strings = gfar_gstrings,
1812  .get_sset_count = gfar_sset_count,
1813  .get_ethtool_stats = gfar_fill_stats,
1814  .get_msglevel = gfar_get_msglevel,
1815  .set_msglevel = gfar_set_msglevel,
1816 #ifdef CONFIG_PM
1817  .get_wol = gfar_get_wol,
1818  .set_wol = gfar_set_wol,
1819 #endif
1820  .set_rxnfc = gfar_set_nfc,
1821  .get_rxnfc = gfar_get_nfc,
1822  .get_ts_info = gfar_get_ts_info,
1823 };
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