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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  *  Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
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/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 <linux/ethtool.h>
40 #include <linux/mii.h>
41 #include <linux/phy.h>
42 #include <linux/sort.h>
43 #include <linux/if_vlan.h>
44
45 #include "gianfar.h"
46
47 extern void gfar_start(struct net_device *dev);
48 extern int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit);
49
50 #define GFAR_MAX_COAL_USECS 0xffff
51 #define GFAR_MAX_COAL_FRAMES 0xff
52 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
53                      u64 * buf);
54 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
55 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
56 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
57 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
58 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
59 static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
60
61 static char stat_gstrings[][ETH_GSTRING_LEN] = {
62         "rx-dropped-by-kernel",
63         "rx-large-frame-errors",
64         "rx-short-frame-errors",
65         "rx-non-octet-errors",
66         "rx-crc-errors",
67         "rx-overrun-errors",
68         "rx-busy-errors",
69         "rx-babbling-errors",
70         "rx-truncated-frames",
71         "ethernet-bus-error",
72         "tx-babbling-errors",
73         "tx-underrun-errors",
74         "rx-skb-missing-errors",
75         "tx-timeout-errors",
76         "tx-rx-64-frames",
77         "tx-rx-65-127-frames",
78         "tx-rx-128-255-frames",
79         "tx-rx-256-511-frames",
80         "tx-rx-512-1023-frames",
81         "tx-rx-1024-1518-frames",
82         "tx-rx-1519-1522-good-vlan",
83         "rx-bytes",
84         "rx-packets",
85         "rx-fcs-errors",
86         "receive-multicast-packet",
87         "receive-broadcast-packet",
88         "rx-control-frame-packets",
89         "rx-pause-frame-packets",
90         "rx-unknown-op-code",
91         "rx-alignment-error",
92         "rx-frame-length-error",
93         "rx-code-error",
94         "rx-carrier-sense-error",
95         "rx-undersize-packets",
96         "rx-oversize-packets",
97         "rx-fragmented-frames",
98         "rx-jabber-frames",
99         "rx-dropped-frames",
100         "tx-byte-counter",
101         "tx-packets",
102         "tx-multicast-packets",
103         "tx-broadcast-packets",
104         "tx-pause-control-frames",
105         "tx-deferral-packets",
106         "tx-excessive-deferral-packets",
107         "tx-single-collision-packets",
108         "tx-multiple-collision-packets",
109         "tx-late-collision-packets",
110         "tx-excessive-collision-packets",
111         "tx-total-collision",
112         "reserved",
113         "tx-dropped-frames",
114         "tx-jabber-frames",
115         "tx-fcs-errors",
116         "tx-control-frames",
117         "tx-oversize-frames",
118         "tx-undersize-frames",
119         "tx-fragmented-frames",
120 };
121
122 /* Fill in a buffer with the strings which correspond to the
123  * stats */
124 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
125 {
126         struct gfar_private *priv = netdev_priv(dev);
127
128         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
129                 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
130         else
131                 memcpy(buf, stat_gstrings,
132                                 GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
133 }
134
135 /* Fill in an array of 64-bit statistics from various sources.
136  * This array will be appended to the end of the ethtool_stats
137  * structure, and returned to user space
138  */
139 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
140 {
141         int i;
142         struct gfar_private *priv = netdev_priv(dev);
143         struct gfar __iomem *regs = priv->gfargrp[0].regs;
144         u64 *extra = (u64 *) & priv->extra_stats;
145
146         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
147                 u32 __iomem *rmon = (u32 __iomem *) &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) gfar_read(&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 static int gfar_sset_count(struct net_device *dev, int sset)
161 {
162         struct gfar_private *priv = netdev_priv(dev);
163
164         switch (sset) {
165         case ETH_SS_STATS:
166                 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
167                         return GFAR_STATS_LEN;
168                 else
169                         return GFAR_EXTRA_STATS_LEN;
170         default:
171                 return -EOPNOTSUPP;
172         }
173 }
174
175 /* Fills in the drvinfo structure with some basic info */
176 static void gfar_gdrvinfo(struct net_device *dev, struct
177               ethtool_drvinfo *drvinfo)
178 {
179         strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN);
180         strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
181         strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
182         strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
183         drvinfo->regdump_len = 0;
184         drvinfo->eedump_len = 0;
185 }
186
187
188 static int gfar_ssettings(struct net_device *dev, struct ethtool_cmd *cmd)
189 {
190         struct gfar_private *priv = netdev_priv(dev);
191         struct phy_device *phydev = priv->phydev;
192
193         if (NULL == phydev)
194                 return -ENODEV;
195
196         return phy_ethtool_sset(phydev, cmd);
197 }
198
199
200 /* Return the current settings in the ethtool_cmd structure */
201 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
202 {
203         struct gfar_private *priv = netdev_priv(dev);
204         struct phy_device *phydev = priv->phydev;
205         struct gfar_priv_rx_q *rx_queue = NULL;
206         struct gfar_priv_tx_q *tx_queue = NULL;
207
208         if (NULL == phydev)
209                 return -ENODEV;
210         tx_queue = priv->tx_queue[0];
211         rx_queue = priv->rx_queue[0];
212
213         /* etsec-1.7 and older versions have only one txic
214          * and rxic regs although they support multiple queues */
215         cmd->maxtxpkt = get_icft_value(tx_queue->txic);
216         cmd->maxrxpkt = get_icft_value(rx_queue->rxic);
217
218         return phy_ethtool_gset(phydev, cmd);
219 }
220
221 /* Return the length of the register structure */
222 static int gfar_reglen(struct net_device *dev)
223 {
224         return sizeof (struct gfar);
225 }
226
227 /* Return a dump of the GFAR register space */
228 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
229 {
230         int i;
231         struct gfar_private *priv = netdev_priv(dev);
232         u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp[0].regs;
233         u32 *buf = (u32 *) regbuf;
234
235         for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
236                 buf[i] = gfar_read(&theregs[i]);
237 }
238
239 /* Convert microseconds to ethernet clock ticks, which changes
240  * depending on what speed the controller is running at */
241 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
242 {
243         unsigned int count;
244
245         /* The timer is different, depending on the interface speed */
246         switch (priv->phydev->speed) {
247         case SPEED_1000:
248                 count = GFAR_GBIT_TIME;
249                 break;
250         case SPEED_100:
251                 count = GFAR_100_TIME;
252                 break;
253         case SPEED_10:
254         default:
255                 count = GFAR_10_TIME;
256                 break;
257         }
258
259         /* Make sure we return a number greater than 0
260          * if usecs > 0 */
261         return (usecs * 1000 + count - 1) / count;
262 }
263
264 /* Convert ethernet clock ticks to microseconds */
265 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
266 {
267         unsigned int count;
268
269         /* The timer is different, depending on the interface speed */
270         switch (priv->phydev->speed) {
271         case SPEED_1000:
272                 count = GFAR_GBIT_TIME;
273                 break;
274         case SPEED_100:
275                 count = GFAR_100_TIME;
276                 break;
277         case SPEED_10:
278         default:
279                 count = GFAR_10_TIME;
280                 break;
281         }
282
283         /* Make sure we return a number greater than 0 */
284         /* if ticks is > 0 */
285         return (ticks * count) / 1000;
286 }
287
288 /* Get the coalescing parameters, and put them in the cvals
289  * structure.  */
290 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
291 {
292         struct gfar_private *priv = netdev_priv(dev);
293         struct gfar_priv_rx_q *rx_queue = NULL;
294         struct gfar_priv_tx_q *tx_queue = NULL;
295         unsigned long rxtime;
296         unsigned long rxcount;
297         unsigned long txtime;
298         unsigned long txcount;
299
300         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
301                 return -EOPNOTSUPP;
302
303         if (NULL == priv->phydev)
304                 return -ENODEV;
305
306         rx_queue = priv->rx_queue[0];
307         tx_queue = priv->tx_queue[0];
308
309         rxtime  = get_ictt_value(rx_queue->rxic);
310         rxcount = get_icft_value(rx_queue->rxic);
311         txtime  = get_ictt_value(tx_queue->txic);
312         txcount = get_icft_value(tx_queue->txic);
313         cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, rxtime);
314         cvals->rx_max_coalesced_frames = rxcount;
315
316         cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, txtime);
317         cvals->tx_max_coalesced_frames = txcount;
318
319         cvals->use_adaptive_rx_coalesce = 0;
320         cvals->use_adaptive_tx_coalesce = 0;
321
322         cvals->pkt_rate_low = 0;
323         cvals->rx_coalesce_usecs_low = 0;
324         cvals->rx_max_coalesced_frames_low = 0;
325         cvals->tx_coalesce_usecs_low = 0;
326         cvals->tx_max_coalesced_frames_low = 0;
327
328         /* When the packet rate is below pkt_rate_high but above
329          * pkt_rate_low (both measured in packets per second) the
330          * normal {rx,tx}_* coalescing parameters are used.
331          */
332
333         /* When the packet rate is (measured in packets per second)
334          * is above pkt_rate_high, the {rx,tx}_*_high parameters are
335          * used.
336          */
337         cvals->pkt_rate_high = 0;
338         cvals->rx_coalesce_usecs_high = 0;
339         cvals->rx_max_coalesced_frames_high = 0;
340         cvals->tx_coalesce_usecs_high = 0;
341         cvals->tx_max_coalesced_frames_high = 0;
342
343         /* How often to do adaptive coalescing packet rate sampling,
344          * measured in seconds.  Must not be zero.
345          */
346         cvals->rate_sample_interval = 0;
347
348         return 0;
349 }
350
351 /* Change the coalescing values.
352  * Both cvals->*_usecs and cvals->*_frames have to be > 0
353  * in order for coalescing to be active
354  */
355 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
356 {
357         struct gfar_private *priv = netdev_priv(dev);
358         int i = 0;
359
360         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
361                 return -EOPNOTSUPP;
362
363         /* Set up rx coalescing */
364         /* As of now, we will enable/disable coalescing for all
365          * queues together in case of eTSEC2, this will be modified
366          * along with the ethtool interface */
367         if ((cvals->rx_coalesce_usecs == 0) ||
368             (cvals->rx_max_coalesced_frames == 0)) {
369                 for (i = 0; i < priv->num_rx_queues; i++)
370                         priv->rx_queue[i]->rxcoalescing = 0;
371         } else {
372                 for (i = 0; i < priv->num_rx_queues; i++)
373                         priv->rx_queue[i]->rxcoalescing = 1;
374         }
375
376         if (NULL == priv->phydev)
377                 return -ENODEV;
378
379         /* Check the bounds of the values */
380         if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
381                 pr_info("Coalescing is limited to %d microseconds\n",
382                         GFAR_MAX_COAL_USECS);
383                 return -EINVAL;
384         }
385
386         if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
387                 pr_info("Coalescing is limited to %d frames\n",
388                         GFAR_MAX_COAL_FRAMES);
389                 return -EINVAL;
390         }
391
392         for (i = 0; i < priv->num_rx_queues; i++) {
393                 priv->rx_queue[i]->rxic = mk_ic_value(
394                         cvals->rx_max_coalesced_frames,
395                         gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
396         }
397
398         /* Set up tx coalescing */
399         if ((cvals->tx_coalesce_usecs == 0) ||
400             (cvals->tx_max_coalesced_frames == 0)) {
401                 for (i = 0; i < priv->num_tx_queues; i++)
402                         priv->tx_queue[i]->txcoalescing = 0;
403         } else {
404                 for (i = 0; i < priv->num_tx_queues; i++)
405                         priv->tx_queue[i]->txcoalescing = 1;
406         }
407
408         /* Check the bounds of the values */
409         if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
410                 pr_info("Coalescing is limited to %d microseconds\n",
411                         GFAR_MAX_COAL_USECS);
412                 return -EINVAL;
413         }
414
415         if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
416                 pr_info("Coalescing is limited to %d frames\n",
417                         GFAR_MAX_COAL_FRAMES);
418                 return -EINVAL;
419         }
420
421         for (i = 0; i < priv->num_tx_queues; i++) {
422                 priv->tx_queue[i]->txic = mk_ic_value(
423                         cvals->tx_max_coalesced_frames,
424                         gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
425         }
426
427         gfar_configure_coalescing(priv, 0xFF, 0xFF);
428
429         return 0;
430 }
431
432 /* Fills in rvals with the current ring parameters.  Currently,
433  * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
434  * jumbo are ignored by the driver */
435 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
436 {
437         struct gfar_private *priv = netdev_priv(dev);
438         struct gfar_priv_tx_q *tx_queue = NULL;
439         struct gfar_priv_rx_q *rx_queue = NULL;
440
441         tx_queue = priv->tx_queue[0];
442         rx_queue = priv->rx_queue[0];
443
444         rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
445         rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
446         rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
447         rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
448
449         /* Values changeable by the user.  The valid values are
450          * in the range 1 to the "*_max_pending" counterpart above.
451          */
452         rvals->rx_pending = rx_queue->rx_ring_size;
453         rvals->rx_mini_pending = rx_queue->rx_ring_size;
454         rvals->rx_jumbo_pending = rx_queue->rx_ring_size;
455         rvals->tx_pending = tx_queue->tx_ring_size;
456 }
457
458 /* Change the current ring parameters, stopping the controller if
459  * necessary so that we don't mess things up while we're in
460  * motion.  We wait for the ring to be clean before reallocating
461  * the rings. */
462 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
463 {
464         struct gfar_private *priv = netdev_priv(dev);
465         int err = 0, i = 0;
466
467         if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
468                 return -EINVAL;
469
470         if (!is_power_of_2(rvals->rx_pending)) {
471                 netdev_err(dev, "Ring sizes must be a power of 2\n");
472                 return -EINVAL;
473         }
474
475         if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
476                 return -EINVAL;
477
478         if (!is_power_of_2(rvals->tx_pending)) {
479                 netdev_err(dev, "Ring sizes must be a power of 2\n");
480                 return -EINVAL;
481         }
482
483
484         if (dev->flags & IFF_UP) {
485                 unsigned long flags;
486
487                 /* Halt TX and RX, and process the frames which
488                  * have already been received */
489                 local_irq_save(flags);
490                 lock_tx_qs(priv);
491                 lock_rx_qs(priv);
492
493                 gfar_halt(dev);
494
495                 unlock_rx_qs(priv);
496                 unlock_tx_qs(priv);
497                 local_irq_restore(flags);
498
499                 for (i = 0; i < priv->num_rx_queues; i++)
500                         gfar_clean_rx_ring(priv->rx_queue[i],
501                                         priv->rx_queue[i]->rx_ring_size);
502
503                 /* Now we take down the rings to rebuild them */
504                 stop_gfar(dev);
505         }
506
507         /* Change the size */
508         for (i = 0; i < priv->num_rx_queues; i++) {
509                 priv->rx_queue[i]->rx_ring_size = rvals->rx_pending;
510                 priv->tx_queue[i]->tx_ring_size = rvals->tx_pending;
511                 priv->tx_queue[i]->num_txbdfree = priv->tx_queue[i]->tx_ring_size;
512         }
513
514         /* Rebuild the rings with the new size */
515         if (dev->flags & IFF_UP) {
516                 err = startup_gfar(dev);
517                 netif_tx_wake_all_queues(dev);
518         }
519         return err;
520 }
521
522 int gfar_set_features(struct net_device *dev, u32 features)
523 {
524         struct gfar_private *priv = netdev_priv(dev);
525         unsigned long flags;
526         int err = 0, i = 0;
527         u32 changed = dev->features ^ features;
528
529         if (!(changed & NETIF_F_RXCSUM))
530                 return 0;
531
532         if (dev->flags & IFF_UP) {
533                 /* Halt TX and RX, and process the frames which
534                  * have already been received */
535                 local_irq_save(flags);
536                 lock_tx_qs(priv);
537                 lock_rx_qs(priv);
538
539                 gfar_halt(dev);
540
541                 unlock_tx_qs(priv);
542                 unlock_rx_qs(priv);
543                 local_irq_restore(flags);
544
545                 for (i = 0; i < priv->num_rx_queues; i++)
546                         gfar_clean_rx_ring(priv->rx_queue[i],
547                                         priv->rx_queue[i]->rx_ring_size);
548
549                 /* Now we take down the rings to rebuild them */
550                 stop_gfar(dev);
551
552                 dev->features = features;
553
554                 err = startup_gfar(dev);
555                 netif_tx_wake_all_queues(dev);
556         }
557         return err;
558 }
559
560 static uint32_t gfar_get_msglevel(struct net_device *dev)
561 {
562         struct gfar_private *priv = netdev_priv(dev);
563         return priv->msg_enable;
564 }
565
566 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
567 {
568         struct gfar_private *priv = netdev_priv(dev);
569         priv->msg_enable = data;
570 }
571
572 #ifdef CONFIG_PM
573 static void gfar_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
574 {
575         struct gfar_private *priv = netdev_priv(dev);
576
577         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) {
578                 wol->supported = WAKE_MAGIC;
579                 wol->wolopts = priv->wol_en ? WAKE_MAGIC : 0;
580         } else {
581                 wol->supported = wol->wolopts = 0;
582         }
583 }
584
585 static int gfar_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
586 {
587         struct gfar_private *priv = netdev_priv(dev);
588         unsigned long flags;
589
590         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
591             wol->wolopts != 0)
592                 return -EINVAL;
593
594         if (wol->wolopts & ~WAKE_MAGIC)
595                 return -EINVAL;
596
597         device_set_wakeup_enable(&dev->dev, wol->wolopts & WAKE_MAGIC);
598
599         spin_lock_irqsave(&priv->bflock, flags);
600         priv->wol_en =  !!device_may_wakeup(&dev->dev);
601         spin_unlock_irqrestore(&priv->bflock, flags);
602
603         return 0;
604 }
605 #endif
606
607 static void ethflow_to_filer_rules (struct gfar_private *priv, u64 ethflow)
608 {
609         u32 fcr = 0x0, fpr = FPR_FILER_MASK;
610
611         if (ethflow & RXH_L2DA) {
612                 fcr = RQFCR_PID_DAH |RQFCR_CMP_NOMATCH |
613                         RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0;
614                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
615                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
616                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
617                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
618
619                 fcr = RQFCR_PID_DAL | RQFCR_AND | RQFCR_CMP_NOMATCH |
620                                 RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0;
621                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
622                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
623                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
624                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
625         }
626
627         if (ethflow & RXH_VLAN) {
628                 fcr = RQFCR_PID_VID | RQFCR_CMP_NOMATCH | RQFCR_HASH |
629                                 RQFCR_AND | RQFCR_HASHTBL_0;
630                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
631                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
632                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
633                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
634         }
635
636         if (ethflow & RXH_IP_SRC) {
637                 fcr = RQFCR_PID_SIA | RQFCR_CMP_NOMATCH | RQFCR_HASH |
638                         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
645         if (ethflow & (RXH_IP_DST)) {
646                 fcr = RQFCR_PID_DIA | RQFCR_CMP_NOMATCH | RQFCR_HASH |
647                         RQFCR_AND | RQFCR_HASHTBL_0;
648                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
649                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
650                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
651                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
652         }
653
654         if (ethflow & RXH_L3_PROTO) {
655                 fcr = RQFCR_PID_L4P | RQFCR_CMP_NOMATCH | RQFCR_HASH |
656                         RQFCR_AND | RQFCR_HASHTBL_0;
657                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
658                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
659                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
660                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
661         }
662
663         if (ethflow & RXH_L4_B_0_1) {
664                 fcr = RQFCR_PID_SPT | RQFCR_CMP_NOMATCH | RQFCR_HASH |
665                         RQFCR_AND | RQFCR_HASHTBL_0;
666                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
667                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
668                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
669                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
670         }
671
672         if (ethflow & RXH_L4_B_2_3) {
673                 fcr = RQFCR_PID_DPT | RQFCR_CMP_NOMATCH | RQFCR_HASH |
674                         RQFCR_AND | RQFCR_HASHTBL_0;
675                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
676                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
677                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
678                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
679         }
680 }
681
682 static int gfar_ethflow_to_filer_table(struct gfar_private *priv, u64 ethflow, u64 class)
683 {
684         unsigned int last_rule_idx = priv->cur_filer_idx;
685         unsigned int cmp_rqfpr;
686         unsigned int local_rqfpr[MAX_FILER_IDX + 1];
687         unsigned int local_rqfcr[MAX_FILER_IDX + 1];
688         int i = 0x0, k = 0x0;
689         int j = MAX_FILER_IDX, l = 0x0;
690
691         switch (class) {
692         case TCP_V4_FLOW:
693                 cmp_rqfpr = RQFPR_IPV4 |RQFPR_TCP;
694                 break;
695         case UDP_V4_FLOW:
696                 cmp_rqfpr = RQFPR_IPV4 |RQFPR_UDP;
697                 break;
698         case TCP_V6_FLOW:
699                 cmp_rqfpr = RQFPR_IPV6 |RQFPR_TCP;
700                 break;
701         case UDP_V6_FLOW:
702                 cmp_rqfpr = RQFPR_IPV6 |RQFPR_UDP;
703                 break;
704         default:
705                 pr_err("Right now this class is not supported\n");
706                 return 0;
707         }
708
709         for (i = 0; i < MAX_FILER_IDX + 1; i++) {
710                 local_rqfpr[j] = priv->ftp_rqfpr[i];
711                 local_rqfcr[j] = priv->ftp_rqfcr[i];
712                 j--;
713                 if ((priv->ftp_rqfcr[i] == (RQFCR_PID_PARSE |
714                         RQFCR_CLE |RQFCR_AND)) &&
715                         (priv->ftp_rqfpr[i] == cmp_rqfpr))
716                         break;
717         }
718
719         if (i == MAX_FILER_IDX + 1) {
720                 pr_err("No parse rule found, can't create hash rules\n");
721                 return 0;
722         }
723
724         /* If a match was found, then it begins the starting of a cluster rule
725          * if it was already programmed, we need to overwrite these rules
726          */
727         for (l = i+1; l < MAX_FILER_IDX; l++) {
728                 if ((priv->ftp_rqfcr[l] & RQFCR_CLE) &&
729                         !(priv->ftp_rqfcr[l] & RQFCR_AND)) {
730                         priv->ftp_rqfcr[l] = RQFCR_CLE | RQFCR_CMP_EXACT |
731                                 RQFCR_HASHTBL_0 | RQFCR_PID_MASK;
732                         priv->ftp_rqfpr[l] = FPR_FILER_MASK;
733                         gfar_write_filer(priv, l, priv->ftp_rqfcr[l],
734                                 priv->ftp_rqfpr[l]);
735                         break;
736                 }
737
738                 if (!(priv->ftp_rqfcr[l] & RQFCR_CLE) &&
739                         (priv->ftp_rqfcr[l] & RQFCR_AND))
740                         continue;
741                 else {
742                         local_rqfpr[j] = priv->ftp_rqfpr[l];
743                         local_rqfcr[j] = priv->ftp_rqfcr[l];
744                         j--;
745                 }
746         }
747
748         priv->cur_filer_idx = l - 1;
749         last_rule_idx = l;
750
751         /* hash rules */
752         ethflow_to_filer_rules(priv, ethflow);
753
754         /* Write back the popped out rules again */
755         for (k = j+1; k < MAX_FILER_IDX; k++) {
756                 priv->ftp_rqfpr[priv->cur_filer_idx] = local_rqfpr[k];
757                 priv->ftp_rqfcr[priv->cur_filer_idx] = local_rqfcr[k];
758                 gfar_write_filer(priv, priv->cur_filer_idx,
759                                 local_rqfcr[k], local_rqfpr[k]);
760                 if (!priv->cur_filer_idx)
761                         break;
762                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
763         }
764
765         return 1;
766 }
767
768 static int gfar_set_hash_opts(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
769 {
770         /* write the filer rules here */
771         if (!gfar_ethflow_to_filer_table(priv, cmd->data, cmd->flow_type))
772                 return -EINVAL;
773
774         return 0;
775 }
776
777 static int gfar_check_filer_hardware(struct gfar_private *priv)
778 {
779         struct gfar __iomem *regs = NULL;
780         u32 i;
781
782         regs = priv->gfargrp[0].regs;
783
784         /* Check if we are in FIFO mode */
785         i = gfar_read(&regs->ecntrl);
786         i &= ECNTRL_FIFM;
787         if (i == ECNTRL_FIFM) {
788                 netdev_notice(priv->ndev, "Interface in FIFO mode\n");
789                 i = gfar_read(&regs->rctrl);
790                 i &= RCTRL_PRSDEP_MASK | RCTRL_PRSFM;
791                 if (i == (RCTRL_PRSDEP_MASK | RCTRL_PRSFM)) {
792                         netdev_info(priv->ndev,
793                                         "Receive Queue Filtering enabled\n");
794                 } else {
795                         netdev_warn(priv->ndev,
796                                         "Receive Queue Filtering disabled\n");
797                         return -EOPNOTSUPP;
798                 }
799         }
800         /* Or in standard mode */
801         else {
802                 i = gfar_read(&regs->rctrl);
803                 i &= RCTRL_PRSDEP_MASK;
804                 if (i == RCTRL_PRSDEP_MASK) {
805                         netdev_info(priv->ndev,
806                                         "Receive Queue Filtering enabled\n");
807                 } else {
808                         netdev_warn(priv->ndev,
809                                         "Receive Queue Filtering disabled\n");
810                         return -EOPNOTSUPP;
811                 }
812         }
813
814         /* Sets the properties for arbitrary filer rule
815          * to the first 4 Layer 4 Bytes */
816         regs->rbifx = 0xC0C1C2C3;
817         return 0;
818 }
819
820 static int gfar_comp_asc(const void *a, const void *b)
821 {
822         return memcmp(a, b, 4);
823 }
824
825 static int gfar_comp_desc(const void *a, const void *b)
826 {
827         return -memcmp(a, b, 4);
828 }
829
830 static void gfar_swap(void *a, void *b, int size)
831 {
832         u32 *_a = a;
833         u32 *_b = b;
834
835         swap(_a[0], _b[0]);
836         swap(_a[1], _b[1]);
837         swap(_a[2], _b[2]);
838         swap(_a[3], _b[3]);
839 }
840
841 /* Write a mask to filer cache */
842 static void gfar_set_mask(u32 mask, struct filer_table *tab)
843 {
844         tab->fe[tab->index].ctrl = RQFCR_AND | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
845         tab->fe[tab->index].prop = mask;
846         tab->index++;
847 }
848
849 /* Sets parse bits (e.g. IP or TCP) */
850 static void gfar_set_parse_bits(u32 value, u32 mask, struct filer_table *tab)
851 {
852         gfar_set_mask(mask, tab);
853         tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_PID_PARSE
854                         | RQFCR_AND;
855         tab->fe[tab->index].prop = value;
856         tab->index++;
857 }
858
859 static void gfar_set_general_attribute(u32 value, u32 mask, u32 flag,
860                 struct filer_table *tab)
861 {
862         gfar_set_mask(mask, tab);
863         tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_AND | flag;
864         tab->fe[tab->index].prop = value;
865         tab->index++;
866 }
867
868 /*
869  * For setting a tuple of value and mask of type flag
870  * Example:
871  * IP-Src = 10.0.0.0/255.0.0.0
872  * value: 0x0A000000 mask: FF000000 flag: RQFPR_IPV4
873  *
874  * Ethtool gives us a value=0 and mask=~0 for don't care a tuple
875  * For a don't care mask it gives us a 0
876  *
877  * The check if don't care and the mask adjustment if mask=0 is done for VLAN
878  * and MAC stuff on an upper level (due to missing information on this level).
879  * For these guys we can discard them if they are value=0 and mask=0.
880  *
881  * Further the all masks are one-padded for better hardware efficiency.
882  */
883 static void gfar_set_attribute(u32 value, u32 mask, u32 flag,
884                 struct filer_table *tab)
885 {
886         switch (flag) {
887                 /* 3bit */
888         case RQFCR_PID_PRI:
889                 if (!(value | mask))
890                         return;
891                 mask |= RQFCR_PID_PRI_MASK;
892                 break;
893                 /* 8bit */
894         case RQFCR_PID_L4P:
895         case RQFCR_PID_TOS:
896                 if (!~(mask | RQFCR_PID_L4P_MASK))
897                         return;
898                 if (!mask)
899                         mask = ~0;
900                 else
901                         mask |= RQFCR_PID_L4P_MASK;
902                 break;
903                 /* 12bit */
904         case RQFCR_PID_VID:
905                 if (!(value | mask))
906                         return;
907                 mask |= RQFCR_PID_VID_MASK;
908                 break;
909                 /* 16bit */
910         case RQFCR_PID_DPT:
911         case RQFCR_PID_SPT:
912         case RQFCR_PID_ETY:
913                 if (!~(mask | RQFCR_PID_PORT_MASK))
914                         return;
915                 if (!mask)
916                         mask = ~0;
917                 else
918                         mask |= RQFCR_PID_PORT_MASK;
919                 break;
920                 /* 24bit */
921         case RQFCR_PID_DAH:
922         case RQFCR_PID_DAL:
923         case RQFCR_PID_SAH:
924         case RQFCR_PID_SAL:
925                 if (!(value | mask))
926                         return;
927                 mask |= RQFCR_PID_MAC_MASK;
928                 break;
929                 /* for all real 32bit masks */
930         default:
931                 if (!~mask)
932                         return;
933                 if (!mask)
934                         mask = ~0;
935                 break;
936         }
937         gfar_set_general_attribute(value, mask, flag, tab);
938 }
939
940 /* Translates value and mask for UDP, TCP or SCTP */
941 static void gfar_set_basic_ip(struct ethtool_tcpip4_spec *value,
942                 struct ethtool_tcpip4_spec *mask, struct filer_table *tab)
943 {
944         gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
945         gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
946         gfar_set_attribute(value->pdst, mask->pdst, RQFCR_PID_DPT, tab);
947         gfar_set_attribute(value->psrc, mask->psrc, RQFCR_PID_SPT, tab);
948         gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
949 }
950
951 /* Translates value and mask for RAW-IP4 */
952 static void gfar_set_user_ip(struct ethtool_usrip4_spec *value,
953                 struct ethtool_usrip4_spec *mask, struct filer_table *tab)
954 {
955         gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
956         gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
957         gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
958         gfar_set_attribute(value->proto, mask->proto, RQFCR_PID_L4P, tab);
959         gfar_set_attribute(value->l4_4_bytes, mask->l4_4_bytes, RQFCR_PID_ARB,
960                         tab);
961
962 }
963
964 /* Translates value and mask for ETHER spec */
965 static void gfar_set_ether(struct ethhdr *value, struct ethhdr *mask,
966                 struct filer_table *tab)
967 {
968         u32 upper_temp_mask = 0;
969         u32 lower_temp_mask = 0;
970         /* Source address */
971         if (!is_broadcast_ether_addr(mask->h_source)) {
972
973                 if (is_zero_ether_addr(mask->h_source)) {
974                         upper_temp_mask = 0xFFFFFFFF;
975                         lower_temp_mask = 0xFFFFFFFF;
976                 } else {
977                         upper_temp_mask = mask->h_source[0] << 16
978                                         | mask->h_source[1] << 8
979                                         | mask->h_source[2];
980                         lower_temp_mask = mask->h_source[3] << 16
981                                         | mask->h_source[4] << 8
982                                         | mask->h_source[5];
983                 }
984                 /* Upper 24bit */
985                 gfar_set_attribute(
986                                 value->h_source[0] << 16 | value->h_source[1]
987                                                 << 8 | value->h_source[2],
988                                 upper_temp_mask, RQFCR_PID_SAH, tab);
989                 /* And the same for the lower part */
990                 gfar_set_attribute(
991                                 value->h_source[3] << 16 | value->h_source[4]
992                                                 << 8 | value->h_source[5],
993                                 lower_temp_mask, RQFCR_PID_SAL, tab);
994         }
995         /* Destination address */
996         if (!is_broadcast_ether_addr(mask->h_dest)) {
997
998                 /* Special for destination is limited broadcast */
999                 if ((is_broadcast_ether_addr(value->h_dest)
1000                                 && is_zero_ether_addr(mask->h_dest))) {
1001                         gfar_set_parse_bits(RQFPR_EBC, RQFPR_EBC, tab);
1002                 } else {
1003
1004                         if (is_zero_ether_addr(mask->h_dest)) {
1005                                 upper_temp_mask = 0xFFFFFFFF;
1006                                 lower_temp_mask = 0xFFFFFFFF;
1007                         } else {
1008                                 upper_temp_mask = mask->h_dest[0] << 16
1009                                                 | mask->h_dest[1] << 8
1010                                                 | mask->h_dest[2];
1011                                 lower_temp_mask = mask->h_dest[3] << 16
1012                                                 | mask->h_dest[4] << 8
1013                                                 | mask->h_dest[5];
1014                         }
1015
1016                         /* Upper 24bit */
1017                         gfar_set_attribute(
1018                                         value->h_dest[0] << 16
1019                                                         | value->h_dest[1] << 8
1020                                                         | value->h_dest[2],
1021                                         upper_temp_mask, RQFCR_PID_DAH, tab);
1022                         /* And the same for the lower part */
1023                         gfar_set_attribute(
1024                                         value->h_dest[3] << 16
1025                                                         | value->h_dest[4] << 8
1026                                                         | value->h_dest[5],
1027                                         lower_temp_mask, RQFCR_PID_DAL, tab);
1028                 }
1029         }
1030
1031         gfar_set_attribute(value->h_proto, mask->h_proto, RQFCR_PID_ETY, tab);
1032
1033 }
1034
1035 /* Convert a rule to binary filter format of gianfar */
1036 static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule,
1037                 struct filer_table *tab)
1038 {
1039         u32 vlan = 0, vlan_mask = 0;
1040         u32 id = 0, id_mask = 0;
1041         u32 cfi = 0, cfi_mask = 0;
1042         u32 prio = 0, prio_mask = 0;
1043
1044         u32 old_index = tab->index;
1045
1046         /* Check if vlan is wanted */
1047         if ((rule->flow_type & FLOW_EXT) && (rule->m_ext.vlan_tci != 0xFFFF)) {
1048                 if (!rule->m_ext.vlan_tci)
1049                         rule->m_ext.vlan_tci = 0xFFFF;
1050
1051                 vlan = RQFPR_VLN;
1052                 vlan_mask = RQFPR_VLN;
1053
1054                 /* Separate the fields */
1055                 id = rule->h_ext.vlan_tci & VLAN_VID_MASK;
1056                 id_mask = rule->m_ext.vlan_tci & VLAN_VID_MASK;
1057                 cfi = rule->h_ext.vlan_tci & VLAN_CFI_MASK;
1058                 cfi_mask = rule->m_ext.vlan_tci & VLAN_CFI_MASK;
1059                 prio = (rule->h_ext.vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1060                 prio_mask = (rule->m_ext.vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1061
1062                 if (cfi == VLAN_TAG_PRESENT && cfi_mask == VLAN_TAG_PRESENT) {
1063                         vlan |= RQFPR_CFI;
1064                         vlan_mask |= RQFPR_CFI;
1065                 } else if (cfi != VLAN_TAG_PRESENT && cfi_mask == VLAN_TAG_PRESENT) {
1066                         vlan_mask |= RQFPR_CFI;
1067                 }
1068         }
1069
1070         switch (rule->flow_type & ~FLOW_EXT) {
1071         case TCP_V4_FLOW:
1072                 gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_TCP | vlan,
1073                                 RQFPR_IPV4 | RQFPR_TCP | vlan_mask, tab);
1074                 gfar_set_basic_ip(&rule->h_u.tcp_ip4_spec,
1075                                 &rule->m_u.tcp_ip4_spec, tab);
1076                 break;
1077         case UDP_V4_FLOW:
1078                 gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_UDP | vlan,
1079                                 RQFPR_IPV4 | RQFPR_UDP | vlan_mask, tab);
1080                 gfar_set_basic_ip(&rule->h_u.udp_ip4_spec,
1081                                 &rule->m_u.udp_ip4_spec, tab);
1082                 break;
1083         case SCTP_V4_FLOW:
1084                 gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1085                                 tab);
1086                 gfar_set_attribute(132, 0, RQFCR_PID_L4P, tab);
1087                 gfar_set_basic_ip((struct ethtool_tcpip4_spec *) &rule->h_u,
1088                                 (struct ethtool_tcpip4_spec *) &rule->m_u, tab);
1089                 break;
1090         case IP_USER_FLOW:
1091                 gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1092                                 tab);
1093                 gfar_set_user_ip((struct ethtool_usrip4_spec *) &rule->h_u,
1094                                 (struct ethtool_usrip4_spec *) &rule->m_u, tab);
1095                 break;
1096         case ETHER_FLOW:
1097                 if (vlan)
1098                         gfar_set_parse_bits(vlan, vlan_mask, tab);
1099                 gfar_set_ether((struct ethhdr *) &rule->h_u,
1100                                 (struct ethhdr *) &rule->m_u, tab);
1101                 break;
1102         default:
1103                 return -1;
1104         }
1105
1106         /* Set the vlan attributes in the end */
1107         if (vlan) {
1108                 gfar_set_attribute(id, id_mask, RQFCR_PID_VID, tab);
1109                 gfar_set_attribute(prio, prio_mask, RQFCR_PID_PRI, tab);
1110         }
1111
1112         /* If there has been nothing written till now, it must be a default */
1113         if (tab->index == old_index) {
1114                 gfar_set_mask(0xFFFFFFFF, tab);
1115                 tab->fe[tab->index].ctrl = 0x20;
1116                 tab->fe[tab->index].prop = 0x0;
1117                 tab->index++;
1118         }
1119
1120         /* Remove last AND */
1121         tab->fe[tab->index - 1].ctrl &= (~RQFCR_AND);
1122
1123         /* Specify which queue to use or to drop */
1124         if (rule->ring_cookie == RX_CLS_FLOW_DISC)
1125                 tab->fe[tab->index - 1].ctrl |= RQFCR_RJE;
1126         else
1127                 tab->fe[tab->index - 1].ctrl |= (rule->ring_cookie << 10);
1128
1129         /* Only big enough entries can be clustered */
1130         if (tab->index > (old_index + 2)) {
1131                 tab->fe[old_index + 1].ctrl |= RQFCR_CLE;
1132                 tab->fe[tab->index - 1].ctrl |= RQFCR_CLE;
1133         }
1134
1135         /* In rare cases the cache can be full while there is free space in hw */
1136         if (tab->index > MAX_FILER_CACHE_IDX - 1)
1137                 return -EBUSY;
1138
1139         return 0;
1140 }
1141
1142 /* Copy size filer entries */
1143 static void gfar_copy_filer_entries(struct gfar_filer_entry dst[0],
1144                 struct gfar_filer_entry src[0], s32 size)
1145 {
1146         while (size > 0) {
1147                 size--;
1148                 dst[size].ctrl = src[size].ctrl;
1149                 dst[size].prop = src[size].prop;
1150         }
1151 }
1152
1153 /* Delete the contents of the filer-table between start and end
1154  * and collapse them */
1155 static int gfar_trim_filer_entries(u32 begin, u32 end, struct filer_table *tab)
1156 {
1157         int length;
1158         if (end > MAX_FILER_CACHE_IDX || end < begin)
1159                 return -EINVAL;
1160
1161         end++;
1162         length = end - begin;
1163
1164         /* Copy */
1165         while (end < tab->index) {
1166                 tab->fe[begin].ctrl = tab->fe[end].ctrl;
1167                 tab->fe[begin++].prop = tab->fe[end++].prop;
1168
1169         }
1170         /* Fill up with don't cares */
1171         while (begin < tab->index) {
1172                 tab->fe[begin].ctrl = 0x60;
1173                 tab->fe[begin].prop = 0xFFFFFFFF;
1174                 begin++;
1175         }
1176
1177         tab->index -= length;
1178         return 0;
1179 }
1180
1181 /* Make space on the wanted location */
1182 static int gfar_expand_filer_entries(u32 begin, u32 length,
1183                 struct filer_table *tab)
1184 {
1185         if (length == 0 || length + tab->index > MAX_FILER_CACHE_IDX || begin
1186                         > MAX_FILER_CACHE_IDX)
1187                 return -EINVAL;
1188
1189         gfar_copy_filer_entries(&(tab->fe[begin + length]), &(tab->fe[begin]),
1190                         tab->index - length + 1);
1191
1192         tab->index += length;
1193         return 0;
1194 }
1195
1196 static int gfar_get_next_cluster_start(int start, struct filer_table *tab)
1197 {
1198         for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) {
1199                 if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE))
1200                                 == (RQFCR_AND | RQFCR_CLE))
1201                         return start;
1202         }
1203         return -1;
1204 }
1205
1206 static int gfar_get_next_cluster_end(int start, struct filer_table *tab)
1207 {
1208         for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) {
1209                 if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE))
1210                                 == (RQFCR_CLE))
1211                         return start;
1212         }
1213         return -1;
1214 }
1215
1216 /*
1217  * Uses hardwares clustering option to reduce
1218  * the number of filer table entries
1219  */
1220 static void gfar_cluster_filer(struct filer_table *tab)
1221 {
1222         s32 i = -1, j, iend, jend;
1223
1224         while ((i = gfar_get_next_cluster_start(++i, tab)) != -1) {
1225                 j = i;
1226                 while ((j = gfar_get_next_cluster_start(++j, tab)) != -1) {
1227                         /*
1228                          * The cluster entries self and the previous one
1229                          * (a mask) must be identical!
1230                          */
1231                         if (tab->fe[i].ctrl != tab->fe[j].ctrl)
1232                                 break;
1233                         if (tab->fe[i].prop != tab->fe[j].prop)
1234                                 break;
1235                         if (tab->fe[i - 1].ctrl != tab->fe[j - 1].ctrl)
1236                                 break;
1237                         if (tab->fe[i - 1].prop != tab->fe[j - 1].prop)
1238                                 break;
1239                         iend = gfar_get_next_cluster_end(i, tab);
1240                         jend = gfar_get_next_cluster_end(j, tab);
1241                         if (jend == -1 || iend == -1)
1242                                 break;
1243                         /*
1244                          * First we make some free space, where our cluster
1245                          * element should be. Then we copy it there and finally
1246                          * delete in from its old location.
1247                          */
1248
1249                         if (gfar_expand_filer_entries(iend, (jend - j), tab)
1250                                         == -EINVAL)
1251                                 break;
1252
1253                         gfar_copy_filer_entries(&(tab->fe[iend + 1]),
1254                                         &(tab->fe[jend + 1]), jend - j);
1255
1256                         if (gfar_trim_filer_entries(jend - 1,
1257                                         jend + (jend - j), tab) == -EINVAL)
1258                                 return;
1259
1260                         /* Mask out cluster bit */
1261                         tab->fe[iend].ctrl &= ~(RQFCR_CLE);
1262                 }
1263         }
1264 }
1265
1266 /* Swaps the masked bits of a1<>a2 and b1<>b2 */
1267 static void gfar_swap_bits(struct gfar_filer_entry *a1,
1268                 struct gfar_filer_entry *a2, struct gfar_filer_entry *b1,
1269                 struct gfar_filer_entry *b2, u32 mask)
1270 {
1271         u32 temp[4];
1272         temp[0] = a1->ctrl & mask;
1273         temp[1] = a2->ctrl & mask;
1274         temp[2] = b1->ctrl & mask;
1275         temp[3] = b2->ctrl & mask;
1276
1277         a1->ctrl &= ~mask;
1278         a2->ctrl &= ~mask;
1279         b1->ctrl &= ~mask;
1280         b2->ctrl &= ~mask;
1281
1282         a1->ctrl |= temp[1];
1283         a2->ctrl |= temp[0];
1284         b1->ctrl |= temp[3];
1285         b2->ctrl |= temp[2];
1286 }
1287
1288 /*
1289  * Generate a list consisting of masks values with their start and
1290  * end of validity and block as indicator for parts belonging
1291  * together (glued by ANDs) in mask_table
1292  */
1293 static u32 gfar_generate_mask_table(struct gfar_mask_entry *mask_table,
1294                 struct filer_table *tab)
1295 {
1296         u32 i, and_index = 0, block_index = 1;
1297
1298         for (i = 0; i < tab->index; i++) {
1299
1300                 /* LSByte of control = 0 sets a mask */
1301                 if (!(tab->fe[i].ctrl & 0xF)) {
1302                         mask_table[and_index].mask = tab->fe[i].prop;
1303                         mask_table[and_index].start = i;
1304                         mask_table[and_index].block = block_index;
1305                         if (and_index >= 1)
1306                                 mask_table[and_index - 1].end = i - 1;
1307                         and_index++;
1308                 }
1309                 /* cluster starts and ends will be separated because they should
1310                  * hold their position */
1311                 if (tab->fe[i].ctrl & RQFCR_CLE)
1312                         block_index++;
1313                 /* A not set AND indicates the end of a depended block */
1314                 if (!(tab->fe[i].ctrl & RQFCR_AND))
1315                         block_index++;
1316
1317         }
1318
1319         mask_table[and_index - 1].end = i - 1;
1320
1321         return and_index;
1322 }
1323
1324 /*
1325  * Sorts the entries of mask_table by the values of the masks.
1326  * Important: The 0xFF80 flags of the first and last entry of a
1327  * block must hold their position (which queue, CLusterEnable, ReJEct,
1328  * AND)
1329  */
1330 static void gfar_sort_mask_table(struct gfar_mask_entry *mask_table,
1331                 struct filer_table *temp_table, u32 and_index)
1332 {
1333         /* Pointer to compare function (_asc or _desc) */
1334         int (*gfar_comp)(const void *, const void *);
1335
1336         u32 i, size = 0, start = 0, prev = 1;
1337         u32 old_first, old_last, new_first, new_last;
1338
1339         gfar_comp = &gfar_comp_desc;
1340
1341         for (i = 0; i < and_index; i++) {
1342
1343                 if (prev != mask_table[i].block) {
1344                         old_first = mask_table[start].start + 1;
1345                         old_last = mask_table[i - 1].end;
1346                         sort(mask_table + start, size,
1347                                         sizeof(struct gfar_mask_entry),
1348                                         gfar_comp, &gfar_swap);
1349
1350                         /* Toggle order for every block. This makes the
1351                          * thing more efficient! */
1352                         if (gfar_comp == gfar_comp_desc)
1353                                 gfar_comp = &gfar_comp_asc;
1354                         else
1355                                 gfar_comp = &gfar_comp_desc;
1356
1357                         new_first = mask_table[start].start + 1;
1358                         new_last = mask_table[i - 1].end;
1359
1360                         gfar_swap_bits(&temp_table->fe[new_first],
1361                                         &temp_table->fe[old_first],
1362                                         &temp_table->fe[new_last],
1363                                         &temp_table->fe[old_last],
1364                                         RQFCR_QUEUE | RQFCR_CLE |
1365                                                 RQFCR_RJE | RQFCR_AND
1366                                         );
1367
1368                         start = i;
1369                         size = 0;
1370                 }
1371                 size++;
1372                 prev = mask_table[i].block;
1373         }
1374
1375 }
1376
1377 /*
1378  * Reduces the number of masks needed in the filer table to save entries
1379  * This is done by sorting the masks of a depended block. A depended block is
1380  * identified by gluing ANDs or CLE. The sorting order toggles after every
1381  * block. Of course entries in scope of a mask must change their location with
1382  * it.
1383  */
1384 static int gfar_optimize_filer_masks(struct filer_table *tab)
1385 {
1386         struct filer_table *temp_table;
1387         struct gfar_mask_entry *mask_table;
1388
1389         u32 and_index = 0, previous_mask = 0, i = 0, j = 0, size = 0;
1390         s32 ret = 0;
1391
1392         /* We need a copy of the filer table because
1393          * we want to change its order */
1394         temp_table = kmalloc(sizeof(*temp_table), GFP_KERNEL);
1395         if (temp_table == NULL)
1396                 return -ENOMEM;
1397         memcpy(temp_table, tab, sizeof(*temp_table));
1398
1399         mask_table = kcalloc(MAX_FILER_CACHE_IDX / 2 + 1,
1400                         sizeof(struct gfar_mask_entry), GFP_KERNEL);
1401
1402         if (mask_table == NULL) {
1403                 ret = -ENOMEM;
1404                 goto end;
1405         }
1406
1407         and_index = gfar_generate_mask_table(mask_table, tab);
1408
1409         gfar_sort_mask_table(mask_table, temp_table, and_index);
1410
1411         /* Now we can copy the data from our duplicated filer table to
1412          * the real one in the order the mask table says */
1413         for (i = 0; i < and_index; i++) {
1414                 size = mask_table[i].end - mask_table[i].start + 1;
1415                 gfar_copy_filer_entries(&(tab->fe[j]),
1416                                 &(temp_table->fe[mask_table[i].start]), size);
1417                 j += size;
1418         }
1419
1420         /* And finally we just have to check for duplicated masks and drop the
1421          * second ones */
1422         for (i = 0; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1423                 if (tab->fe[i].ctrl == 0x80) {
1424                         previous_mask = i++;
1425                         break;
1426                 }
1427         }
1428         for (; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1429                 if (tab->fe[i].ctrl == 0x80) {
1430                         if (tab->fe[i].prop == tab->fe[previous_mask].prop) {
1431                                 /* Two identical ones found!
1432                                  * So drop the second one! */
1433                                 gfar_trim_filer_entries(i, i, tab);
1434                         } else
1435                                 /* Not identical! */
1436                                 previous_mask = i;
1437                 }
1438         }
1439
1440         kfree(mask_table);
1441 end:    kfree(temp_table);
1442         return ret;
1443 }
1444
1445 /* Write the bit-pattern from software's buffer to hardware registers */
1446 static int gfar_write_filer_table(struct gfar_private *priv,
1447                 struct filer_table *tab)
1448 {
1449         u32 i = 0;
1450         if (tab->index > MAX_FILER_IDX - 1)
1451                 return -EBUSY;
1452
1453         /* Avoid inconsistent filer table to be processed */
1454         lock_rx_qs(priv);
1455
1456         /* Fill regular entries */
1457         for (; i < MAX_FILER_IDX - 1 && (tab->fe[i].ctrl | tab->fe[i].ctrl); i++)
1458                 gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
1459         /* Fill the rest with fall-troughs */
1460         for (; i < MAX_FILER_IDX - 1; i++)
1461                 gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
1462         /* Last entry must be default accept
1463          * because that's what people expect */
1464         gfar_write_filer(priv, i, 0x20, 0x0);
1465
1466         unlock_rx_qs(priv);
1467
1468         return 0;
1469 }
1470
1471 static int gfar_check_capability(struct ethtool_rx_flow_spec *flow,
1472                 struct gfar_private *priv)
1473 {
1474
1475         if (flow->flow_type & FLOW_EXT) {
1476                 if (~flow->m_ext.data[0] || ~flow->m_ext.data[1])
1477                         netdev_warn(priv->ndev,
1478                                         "User-specific data not supported!\n");
1479                 if (~flow->m_ext.vlan_etype)
1480                         netdev_warn(priv->ndev,
1481                                         "VLAN-etype not supported!\n");
1482         }
1483         if (flow->flow_type == IP_USER_FLOW)
1484                 if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
1485                         netdev_warn(priv->ndev,
1486                                         "IP-Version differing from IPv4 not supported!\n");
1487
1488         return 0;
1489 }
1490
1491 static int gfar_process_filer_changes(struct gfar_private *priv)
1492 {
1493         struct ethtool_flow_spec_container *j;
1494         struct filer_table *tab;
1495         s32 i = 0;
1496         s32 ret = 0;
1497
1498         /* So index is set to zero, too! */
1499         tab = kzalloc(sizeof(*tab), GFP_KERNEL);
1500         if (tab == NULL)
1501                 return -ENOMEM;
1502
1503         /* Now convert the existing filer data from flow_spec into
1504          * filer tables binary format */
1505         list_for_each_entry(j, &priv->rx_list.list, list) {
1506                 ret = gfar_convert_to_filer(&j->fs, tab);
1507                 if (ret == -EBUSY) {
1508                         netdev_err(priv->ndev, "Rule not added: No free space!\n");
1509                         goto end;
1510                 }
1511                 if (ret == -1) {
1512                         netdev_err(priv->ndev, "Rule not added: Unsupported Flow-type!\n");
1513                         goto end;
1514                 }
1515         }
1516
1517         i = tab->index;
1518
1519         /* Optimizations to save entries */
1520         gfar_cluster_filer(tab);
1521         gfar_optimize_filer_masks(tab);
1522
1523         pr_debug("\n\tSummary:\n"
1524                 "\tData on hardware: %d\n"
1525                 "\tCompression rate: %d%%\n",
1526                 tab->index, 100 - (100 * tab->index) / i);
1527
1528         /* Write everything to hardware */
1529         ret = gfar_write_filer_table(priv, tab);
1530         if (ret == -EBUSY) {
1531                 netdev_err(priv->ndev, "Rule not added: No free space!\n");
1532                 goto end;
1533         }
1534
1535 end:    kfree(tab);
1536         return ret;
1537 }
1538
1539 static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow)
1540 {
1541         u32 i = 0;
1542
1543         for (i = 0; i < sizeof(flow->m_u); i++)
1544                 flow->m_u.hdata[i] ^= 0xFF;
1545
1546         flow->m_ext.vlan_etype ^= 0xFFFF;
1547         flow->m_ext.vlan_tci ^= 0xFFFF;
1548         flow->m_ext.data[0] ^= ~0;
1549         flow->m_ext.data[1] ^= ~0;
1550 }
1551
1552 static int gfar_add_cls(struct gfar_private *priv,
1553                 struct ethtool_rx_flow_spec *flow)
1554 {
1555         struct ethtool_flow_spec_container *temp, *comp;
1556         int ret = 0;
1557
1558         temp = kmalloc(sizeof(*temp), GFP_KERNEL);
1559         if (temp == NULL)
1560                 return -ENOMEM;
1561         memcpy(&temp->fs, flow, sizeof(temp->fs));
1562
1563         gfar_invert_masks(&temp->fs);
1564         ret = gfar_check_capability(&temp->fs, priv);
1565         if (ret)
1566                 goto clean_mem;
1567         /* Link in the new element at the right @location */
1568         if (list_empty(&priv->rx_list.list)) {
1569                 ret = gfar_check_filer_hardware(priv);
1570                 if (ret != 0)
1571                         goto clean_mem;
1572                 list_add(&temp->list, &priv->rx_list.list);
1573                 goto process;
1574         } else {
1575
1576                 list_for_each_entry(comp, &priv->rx_list.list, list) {
1577                         if (comp->fs.location > flow->location) {
1578                                 list_add_tail(&temp->list, &comp->list);
1579                                 goto process;
1580                         }
1581                         if (comp->fs.location == flow->location) {
1582                                 netdev_err(priv->ndev,
1583                                                 "Rule not added: ID %d not free!\n",
1584                                         flow->location);
1585                                 ret = -EBUSY;
1586                                 goto clean_mem;
1587                         }
1588                 }
1589                 list_add_tail(&temp->list, &priv->rx_list.list);
1590         }
1591
1592 process:
1593         ret = gfar_process_filer_changes(priv);
1594         if (ret)
1595                 goto clean_list;
1596         priv->rx_list.count++;
1597         return ret;
1598
1599 clean_list:
1600         list_del(&temp->list);
1601 clean_mem:
1602         kfree(temp);
1603         return ret;
1604 }
1605
1606 static int gfar_del_cls(struct gfar_private *priv, u32 loc)
1607 {
1608         struct ethtool_flow_spec_container *comp;
1609         u32 ret = -EINVAL;
1610
1611         if (list_empty(&priv->rx_list.list))
1612                 return ret;
1613
1614         list_for_each_entry(comp, &priv->rx_list.list, list) {
1615                 if (comp->fs.location == loc) {
1616                         list_del(&comp->list);
1617                         kfree(comp);
1618                         priv->rx_list.count--;
1619                         gfar_process_filer_changes(priv);
1620                         ret = 0;
1621                         break;
1622                 }
1623         }
1624
1625         return ret;
1626
1627 }
1628
1629 static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
1630 {
1631         struct ethtool_flow_spec_container *comp;
1632         u32 ret = -EINVAL;
1633
1634         list_for_each_entry(comp, &priv->rx_list.list, list) {
1635                 if (comp->fs.location == cmd->fs.location) {
1636                         memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs));
1637                         gfar_invert_masks(&cmd->fs);
1638                         ret = 0;
1639                         break;
1640                 }
1641         }
1642
1643         return ret;
1644 }
1645
1646 static int gfar_get_cls_all(struct gfar_private *priv,
1647                 struct ethtool_rxnfc *cmd, u32 *rule_locs)
1648 {
1649         struct ethtool_flow_spec_container *comp;
1650         u32 i = 0;
1651
1652         list_for_each_entry(comp, &priv->rx_list.list, list) {
1653                 if (i <= cmd->rule_cnt) {
1654                         rule_locs[i] = comp->fs.location;
1655                         i++;
1656                 }
1657         }
1658
1659         cmd->data = MAX_FILER_IDX;
1660
1661         return 0;
1662 }
1663
1664 static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
1665 {
1666         struct gfar_private *priv = netdev_priv(dev);
1667         int ret = 0;
1668
1669         mutex_lock(&priv->rx_queue_access);
1670
1671         switch (cmd->cmd) {
1672         case ETHTOOL_SRXFH:
1673                 ret = gfar_set_hash_opts(priv, cmd);
1674                 break;
1675         case ETHTOOL_SRXCLSRLINS:
1676                 if (cmd->fs.ring_cookie != RX_CLS_FLOW_DISC &&
1677                         cmd->fs.ring_cookie >= priv->num_rx_queues) {
1678                         ret = -EINVAL;
1679                         break;
1680                 }
1681                 ret = gfar_add_cls(priv, &cmd->fs);
1682                 break;
1683         case ETHTOOL_SRXCLSRLDEL:
1684                 ret = gfar_del_cls(priv, cmd->fs.location);
1685                 break;
1686         default:
1687                 ret = -EINVAL;
1688         }
1689
1690         mutex_unlock(&priv->rx_queue_access);
1691
1692         return ret;
1693 }
1694
1695 static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
1696                 void *rule_locs)
1697 {
1698         struct gfar_private *priv = netdev_priv(dev);
1699         int ret = 0;
1700
1701         switch (cmd->cmd) {
1702         case ETHTOOL_GRXRINGS:
1703                 cmd->data = priv->num_rx_queues;
1704                 break;
1705         case ETHTOOL_GRXCLSRLCNT:
1706                 cmd->rule_cnt = priv->rx_list.count;
1707                 break;
1708         case ETHTOOL_GRXCLSRULE:
1709                 ret = gfar_get_cls(priv, cmd);
1710                 break;
1711         case ETHTOOL_GRXCLSRLALL:
1712                 ret = gfar_get_cls_all(priv, cmd, (u32 *) rule_locs);
1713                 break;
1714         default:
1715                 ret = -EINVAL;
1716                 break;
1717         }
1718
1719         return ret;
1720 }
1721
1722 const struct ethtool_ops gfar_ethtool_ops = {
1723         .get_settings = gfar_gsettings,
1724         .set_settings = gfar_ssettings,
1725         .get_drvinfo = gfar_gdrvinfo,
1726         .get_regs_len = gfar_reglen,
1727         .get_regs = gfar_get_regs,
1728         .get_link = ethtool_op_get_link,
1729         .get_coalesce = gfar_gcoalesce,
1730         .set_coalesce = gfar_scoalesce,
1731         .get_ringparam = gfar_gringparam,
1732         .set_ringparam = gfar_sringparam,
1733         .get_strings = gfar_gstrings,
1734         .get_sset_count = gfar_sset_count,
1735         .get_ethtool_stats = gfar_fill_stats,
1736         .get_msglevel = gfar_get_msglevel,
1737         .set_msglevel = gfar_set_msglevel,
1738 #ifdef CONFIG_PM
1739         .get_wol = gfar_get_wol,
1740         .set_wol = gfar_set_wol,
1741 #endif
1742         .set_rxnfc = gfar_set_nfc,
1743         .get_rxnfc = gfar_get_nfc,
1744 };