net: wireless: sd8797: Marvell sd8797 Wi-Fi driver
[linux-2.6.git] / drivers / net / gianfar_ethtool.c
1 /*
2  *  drivers/net/gianfar_ethtool.c
3  *
4  *  Gianfar Ethernet Driver
5  *  Ethtool support for Gianfar Enet
6  *  Based on e1000 ethtool support
7  *
8  *  Author: Andy Fleming
9  *  Maintainer: Kumar Gala
10  *  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_HW_VLAN_TX|NETIF_F_HW_VLAN_RX))
530                 gfar_vlan_mode(dev, features);
531
532         if (!(changed & NETIF_F_RXCSUM))
533                 return 0;
534
535         if (dev->flags & IFF_UP) {
536                 /* Halt TX and RX, and process the frames which
537                  * have already been received */
538                 local_irq_save(flags);
539                 lock_tx_qs(priv);
540                 lock_rx_qs(priv);
541
542                 gfar_halt(dev);
543
544                 unlock_tx_qs(priv);
545                 unlock_rx_qs(priv);
546                 local_irq_restore(flags);
547
548                 for (i = 0; i < priv->num_rx_queues; i++)
549                         gfar_clean_rx_ring(priv->rx_queue[i],
550                                         priv->rx_queue[i]->rx_ring_size);
551
552                 /* Now we take down the rings to rebuild them */
553                 stop_gfar(dev);
554
555                 dev->features = features;
556
557                 err = startup_gfar(dev);
558                 netif_tx_wake_all_queues(dev);
559         }
560         return err;
561 }
562
563 static uint32_t gfar_get_msglevel(struct net_device *dev)
564 {
565         struct gfar_private *priv = netdev_priv(dev);
566         return priv->msg_enable;
567 }
568
569 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
570 {
571         struct gfar_private *priv = netdev_priv(dev);
572         priv->msg_enable = data;
573 }
574
575 #ifdef CONFIG_PM
576 static void gfar_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
577 {
578         struct gfar_private *priv = netdev_priv(dev);
579
580         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) {
581                 wol->supported = WAKE_MAGIC;
582                 wol->wolopts = priv->wol_en ? WAKE_MAGIC : 0;
583         } else {
584                 wol->supported = wol->wolopts = 0;
585         }
586 }
587
588 static int gfar_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
589 {
590         struct gfar_private *priv = netdev_priv(dev);
591         unsigned long flags;
592
593         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
594             wol->wolopts != 0)
595                 return -EINVAL;
596
597         if (wol->wolopts & ~WAKE_MAGIC)
598                 return -EINVAL;
599
600         device_set_wakeup_enable(&dev->dev, wol->wolopts & WAKE_MAGIC);
601
602         spin_lock_irqsave(&priv->bflock, flags);
603         priv->wol_en =  !!device_may_wakeup(&dev->dev);
604         spin_unlock_irqrestore(&priv->bflock, flags);
605
606         return 0;
607 }
608 #endif
609
610 static void ethflow_to_filer_rules (struct gfar_private *priv, u64 ethflow)
611 {
612         u32 fcr = 0x0, fpr = FPR_FILER_MASK;
613
614         if (ethflow & RXH_L2DA) {
615                 fcr = RQFCR_PID_DAH |RQFCR_CMP_NOMATCH |
616                         RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0;
617                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
618                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
619                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
620                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
621
622                 fcr = RQFCR_PID_DAL | RQFCR_AND | RQFCR_CMP_NOMATCH |
623                                 RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0;
624                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
625                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
626                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
627                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
628         }
629
630         if (ethflow & RXH_VLAN) {
631                 fcr = RQFCR_PID_VID | RQFCR_CMP_NOMATCH | RQFCR_HASH |
632                                 RQFCR_AND | RQFCR_HASHTBL_0;
633                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
634                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
635                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
636                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
637         }
638
639         if (ethflow & RXH_IP_SRC) {
640                 fcr = RQFCR_PID_SIA | RQFCR_CMP_NOMATCH | RQFCR_HASH |
641                         RQFCR_AND | RQFCR_HASHTBL_0;
642                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
643                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
644                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
645                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
646         }
647
648         if (ethflow & (RXH_IP_DST)) {
649                 fcr = RQFCR_PID_DIA | RQFCR_CMP_NOMATCH | RQFCR_HASH |
650                         RQFCR_AND | RQFCR_HASHTBL_0;
651                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
652                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
653                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
654                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
655         }
656
657         if (ethflow & RXH_L3_PROTO) {
658                 fcr = RQFCR_PID_L4P | RQFCR_CMP_NOMATCH | RQFCR_HASH |
659                         RQFCR_AND | RQFCR_HASHTBL_0;
660                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
661                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
662                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
663                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
664         }
665
666         if (ethflow & RXH_L4_B_0_1) {
667                 fcr = RQFCR_PID_SPT | RQFCR_CMP_NOMATCH | RQFCR_HASH |
668                         RQFCR_AND | RQFCR_HASHTBL_0;
669                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
670                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
671                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
672                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
673         }
674
675         if (ethflow & RXH_L4_B_2_3) {
676                 fcr = RQFCR_PID_DPT | RQFCR_CMP_NOMATCH | RQFCR_HASH |
677                         RQFCR_AND | RQFCR_HASHTBL_0;
678                 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
679                 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
680                 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
681                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
682         }
683 }
684
685 static int gfar_ethflow_to_filer_table(struct gfar_private *priv, u64 ethflow, u64 class)
686 {
687         unsigned int last_rule_idx = priv->cur_filer_idx;
688         unsigned int cmp_rqfpr;
689         unsigned int *local_rqfpr;
690         unsigned int *local_rqfcr;
691         int i = 0x0, k = 0x0;
692         int j = MAX_FILER_IDX, l = 0x0;
693         int ret = 1;
694
695         local_rqfpr = kmalloc(sizeof(unsigned int) * (MAX_FILER_IDX + 1),
696                 GFP_KERNEL);
697         local_rqfcr = kmalloc(sizeof(unsigned int) * (MAX_FILER_IDX + 1),
698                 GFP_KERNEL);
699         if (!local_rqfpr || !local_rqfcr) {
700                 pr_err("Out of memory\n");
701                 ret = 0;
702                 goto err;
703         }
704
705         switch (class) {
706         case TCP_V4_FLOW:
707                 cmp_rqfpr = RQFPR_IPV4 |RQFPR_TCP;
708                 break;
709         case UDP_V4_FLOW:
710                 cmp_rqfpr = RQFPR_IPV4 |RQFPR_UDP;
711                 break;
712         case TCP_V6_FLOW:
713                 cmp_rqfpr = RQFPR_IPV6 |RQFPR_TCP;
714                 break;
715         case UDP_V6_FLOW:
716                 cmp_rqfpr = RQFPR_IPV6 |RQFPR_UDP;
717                 break;
718         default:
719                 pr_err("Right now this class is not supported\n");
720                 ret = 0;
721                 goto err;
722         }
723
724         for (i = 0; i < MAX_FILER_IDX + 1; i++) {
725                 local_rqfpr[j] = priv->ftp_rqfpr[i];
726                 local_rqfcr[j] = priv->ftp_rqfcr[i];
727                 j--;
728                 if ((priv->ftp_rqfcr[i] == (RQFCR_PID_PARSE |
729                         RQFCR_CLE |RQFCR_AND)) &&
730                         (priv->ftp_rqfpr[i] == cmp_rqfpr))
731                         break;
732         }
733
734         if (i == MAX_FILER_IDX + 1) {
735                 pr_err("No parse rule found, can't create hash rules\n");
736                 ret = 0;
737                 goto err;
738         }
739
740         /* If a match was found, then it begins the starting of a cluster rule
741          * if it was already programmed, we need to overwrite these rules
742          */
743         for (l = i+1; l < MAX_FILER_IDX; l++) {
744                 if ((priv->ftp_rqfcr[l] & RQFCR_CLE) &&
745                         !(priv->ftp_rqfcr[l] & RQFCR_AND)) {
746                         priv->ftp_rqfcr[l] = RQFCR_CLE | RQFCR_CMP_EXACT |
747                                 RQFCR_HASHTBL_0 | RQFCR_PID_MASK;
748                         priv->ftp_rqfpr[l] = FPR_FILER_MASK;
749                         gfar_write_filer(priv, l, priv->ftp_rqfcr[l],
750                                 priv->ftp_rqfpr[l]);
751                         break;
752                 }
753
754                 if (!(priv->ftp_rqfcr[l] & RQFCR_CLE) &&
755                         (priv->ftp_rqfcr[l] & RQFCR_AND))
756                         continue;
757                 else {
758                         local_rqfpr[j] = priv->ftp_rqfpr[l];
759                         local_rqfcr[j] = priv->ftp_rqfcr[l];
760                         j--;
761                 }
762         }
763
764         priv->cur_filer_idx = l - 1;
765         last_rule_idx = l;
766
767         /* hash rules */
768         ethflow_to_filer_rules(priv, ethflow);
769
770         /* Write back the popped out rules again */
771         for (k = j+1; k < MAX_FILER_IDX; k++) {
772                 priv->ftp_rqfpr[priv->cur_filer_idx] = local_rqfpr[k];
773                 priv->ftp_rqfcr[priv->cur_filer_idx] = local_rqfcr[k];
774                 gfar_write_filer(priv, priv->cur_filer_idx,
775                                 local_rqfcr[k], local_rqfpr[k]);
776                 if (!priv->cur_filer_idx)
777                         break;
778                 priv->cur_filer_idx = priv->cur_filer_idx - 1;
779         }
780
781 err:
782         kfree(local_rqfcr);
783         kfree(local_rqfpr);
784         return ret;
785 }
786
787 static int gfar_set_hash_opts(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
788 {
789         /* write the filer rules here */
790         if (!gfar_ethflow_to_filer_table(priv, cmd->data, cmd->flow_type))
791                 return -EINVAL;
792
793         return 0;
794 }
795
796 static int gfar_check_filer_hardware(struct gfar_private *priv)
797 {
798         struct gfar __iomem *regs = NULL;
799         u32 i;
800
801         regs = priv->gfargrp[0].regs;
802
803         /* Check if we are in FIFO mode */
804         i = gfar_read(&regs->ecntrl);
805         i &= ECNTRL_FIFM;
806         if (i == ECNTRL_FIFM) {
807                 netdev_notice(priv->ndev, "Interface in FIFO mode\n");
808                 i = gfar_read(&regs->rctrl);
809                 i &= RCTRL_PRSDEP_MASK | RCTRL_PRSFM;
810                 if (i == (RCTRL_PRSDEP_MASK | RCTRL_PRSFM)) {
811                         netdev_info(priv->ndev,
812                                         "Receive Queue Filtering enabled\n");
813                 } else {
814                         netdev_warn(priv->ndev,
815                                         "Receive Queue Filtering disabled\n");
816                         return -EOPNOTSUPP;
817                 }
818         }
819         /* Or in standard mode */
820         else {
821                 i = gfar_read(&regs->rctrl);
822                 i &= RCTRL_PRSDEP_MASK;
823                 if (i == RCTRL_PRSDEP_MASK) {
824                         netdev_info(priv->ndev,
825                                         "Receive Queue Filtering enabled\n");
826                 } else {
827                         netdev_warn(priv->ndev,
828                                         "Receive Queue Filtering disabled\n");
829                         return -EOPNOTSUPP;
830                 }
831         }
832
833         /* Sets the properties for arbitrary filer rule
834          * to the first 4 Layer 4 Bytes */
835         regs->rbifx = 0xC0C1C2C3;
836         return 0;
837 }
838
839 static int gfar_comp_asc(const void *a, const void *b)
840 {
841         return memcmp(a, b, 4);
842 }
843
844 static int gfar_comp_desc(const void *a, const void *b)
845 {
846         return -memcmp(a, b, 4);
847 }
848
849 static void gfar_swap(void *a, void *b, int size)
850 {
851         u32 *_a = a;
852         u32 *_b = b;
853
854         swap(_a[0], _b[0]);
855         swap(_a[1], _b[1]);
856         swap(_a[2], _b[2]);
857         swap(_a[3], _b[3]);
858 }
859
860 /* Write a mask to filer cache */
861 static void gfar_set_mask(u32 mask, struct filer_table *tab)
862 {
863         tab->fe[tab->index].ctrl = RQFCR_AND | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
864         tab->fe[tab->index].prop = mask;
865         tab->index++;
866 }
867
868 /* Sets parse bits (e.g. IP or TCP) */
869 static void gfar_set_parse_bits(u32 value, u32 mask, struct filer_table *tab)
870 {
871         gfar_set_mask(mask, tab);
872         tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_PID_PARSE
873                         | RQFCR_AND;
874         tab->fe[tab->index].prop = value;
875         tab->index++;
876 }
877
878 static void gfar_set_general_attribute(u32 value, u32 mask, u32 flag,
879                 struct filer_table *tab)
880 {
881         gfar_set_mask(mask, tab);
882         tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_AND | flag;
883         tab->fe[tab->index].prop = value;
884         tab->index++;
885 }
886
887 /*
888  * For setting a tuple of value and mask of type flag
889  * Example:
890  * IP-Src = 10.0.0.0/255.0.0.0
891  * value: 0x0A000000 mask: FF000000 flag: RQFPR_IPV4
892  *
893  * Ethtool gives us a value=0 and mask=~0 for don't care a tuple
894  * For a don't care mask it gives us a 0
895  *
896  * The check if don't care and the mask adjustment if mask=0 is done for VLAN
897  * and MAC stuff on an upper level (due to missing information on this level).
898  * For these guys we can discard them if they are value=0 and mask=0.
899  *
900  * Further the all masks are one-padded for better hardware efficiency.
901  */
902 static void gfar_set_attribute(u32 value, u32 mask, u32 flag,
903                 struct filer_table *tab)
904 {
905         switch (flag) {
906                 /* 3bit */
907         case RQFCR_PID_PRI:
908                 if (!(value | mask))
909                         return;
910                 mask |= RQFCR_PID_PRI_MASK;
911                 break;
912                 /* 8bit */
913         case RQFCR_PID_L4P:
914         case RQFCR_PID_TOS:
915                 if (!~(mask | RQFCR_PID_L4P_MASK))
916                         return;
917                 if (!mask)
918                         mask = ~0;
919                 else
920                         mask |= RQFCR_PID_L4P_MASK;
921                 break;
922                 /* 12bit */
923         case RQFCR_PID_VID:
924                 if (!(value | mask))
925                         return;
926                 mask |= RQFCR_PID_VID_MASK;
927                 break;
928                 /* 16bit */
929         case RQFCR_PID_DPT:
930         case RQFCR_PID_SPT:
931         case RQFCR_PID_ETY:
932                 if (!~(mask | RQFCR_PID_PORT_MASK))
933                         return;
934                 if (!mask)
935                         mask = ~0;
936                 else
937                         mask |= RQFCR_PID_PORT_MASK;
938                 break;
939                 /* 24bit */
940         case RQFCR_PID_DAH:
941         case RQFCR_PID_DAL:
942         case RQFCR_PID_SAH:
943         case RQFCR_PID_SAL:
944                 if (!(value | mask))
945                         return;
946                 mask |= RQFCR_PID_MAC_MASK;
947                 break;
948                 /* for all real 32bit masks */
949         default:
950                 if (!~mask)
951                         return;
952                 if (!mask)
953                         mask = ~0;
954                 break;
955         }
956         gfar_set_general_attribute(value, mask, flag, tab);
957 }
958
959 /* Translates value and mask for UDP, TCP or SCTP */
960 static void gfar_set_basic_ip(struct ethtool_tcpip4_spec *value,
961                 struct ethtool_tcpip4_spec *mask, struct filer_table *tab)
962 {
963         gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
964         gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
965         gfar_set_attribute(value->pdst, mask->pdst, RQFCR_PID_DPT, tab);
966         gfar_set_attribute(value->psrc, mask->psrc, RQFCR_PID_SPT, tab);
967         gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
968 }
969
970 /* Translates value and mask for RAW-IP4 */
971 static void gfar_set_user_ip(struct ethtool_usrip4_spec *value,
972                 struct ethtool_usrip4_spec *mask, struct filer_table *tab)
973 {
974         gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
975         gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
976         gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
977         gfar_set_attribute(value->proto, mask->proto, RQFCR_PID_L4P, tab);
978         gfar_set_attribute(value->l4_4_bytes, mask->l4_4_bytes, RQFCR_PID_ARB,
979                         tab);
980
981 }
982
983 /* Translates value and mask for ETHER spec */
984 static void gfar_set_ether(struct ethhdr *value, struct ethhdr *mask,
985                 struct filer_table *tab)
986 {
987         u32 upper_temp_mask = 0;
988         u32 lower_temp_mask = 0;
989         /* Source address */
990         if (!is_broadcast_ether_addr(mask->h_source)) {
991
992                 if (is_zero_ether_addr(mask->h_source)) {
993                         upper_temp_mask = 0xFFFFFFFF;
994                         lower_temp_mask = 0xFFFFFFFF;
995                 } else {
996                         upper_temp_mask = mask->h_source[0] << 16
997                                         | mask->h_source[1] << 8
998                                         | mask->h_source[2];
999                         lower_temp_mask = mask->h_source[3] << 16
1000                                         | mask->h_source[4] << 8
1001                                         | mask->h_source[5];
1002                 }
1003                 /* Upper 24bit */
1004                 gfar_set_attribute(
1005                                 value->h_source[0] << 16 | value->h_source[1]
1006                                                 << 8 | value->h_source[2],
1007                                 upper_temp_mask, RQFCR_PID_SAH, tab);
1008                 /* And the same for the lower part */
1009                 gfar_set_attribute(
1010                                 value->h_source[3] << 16 | value->h_source[4]
1011                                                 << 8 | value->h_source[5],
1012                                 lower_temp_mask, RQFCR_PID_SAL, tab);
1013         }
1014         /* Destination address */
1015         if (!is_broadcast_ether_addr(mask->h_dest)) {
1016
1017                 /* Special for destination is limited broadcast */
1018                 if ((is_broadcast_ether_addr(value->h_dest)
1019                                 && is_zero_ether_addr(mask->h_dest))) {
1020                         gfar_set_parse_bits(RQFPR_EBC, RQFPR_EBC, tab);
1021                 } else {
1022
1023                         if (is_zero_ether_addr(mask->h_dest)) {
1024                                 upper_temp_mask = 0xFFFFFFFF;
1025                                 lower_temp_mask = 0xFFFFFFFF;
1026                         } else {
1027                                 upper_temp_mask = mask->h_dest[0] << 16
1028                                                 | mask->h_dest[1] << 8
1029                                                 | mask->h_dest[2];
1030                                 lower_temp_mask = mask->h_dest[3] << 16
1031                                                 | mask->h_dest[4] << 8
1032                                                 | mask->h_dest[5];
1033                         }
1034
1035                         /* Upper 24bit */
1036                         gfar_set_attribute(
1037                                         value->h_dest[0] << 16
1038                                                         | value->h_dest[1] << 8
1039                                                         | value->h_dest[2],
1040                                         upper_temp_mask, RQFCR_PID_DAH, tab);
1041                         /* And the same for the lower part */
1042                         gfar_set_attribute(
1043                                         value->h_dest[3] << 16
1044                                                         | value->h_dest[4] << 8
1045                                                         | value->h_dest[5],
1046                                         lower_temp_mask, RQFCR_PID_DAL, tab);
1047                 }
1048         }
1049
1050         gfar_set_attribute(value->h_proto, mask->h_proto, RQFCR_PID_ETY, tab);
1051
1052 }
1053
1054 /* Convert a rule to binary filter format of gianfar */
1055 static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule,
1056                 struct filer_table *tab)
1057 {
1058         u32 vlan = 0, vlan_mask = 0;
1059         u32 id = 0, id_mask = 0;
1060         u32 cfi = 0, cfi_mask = 0;
1061         u32 prio = 0, prio_mask = 0;
1062
1063         u32 old_index = tab->index;
1064
1065         /* Check if vlan is wanted */
1066         if ((rule->flow_type & FLOW_EXT) && (rule->m_ext.vlan_tci != 0xFFFF)) {
1067                 if (!rule->m_ext.vlan_tci)
1068                         rule->m_ext.vlan_tci = 0xFFFF;
1069
1070                 vlan = RQFPR_VLN;
1071                 vlan_mask = RQFPR_VLN;
1072
1073                 /* Separate the fields */
1074                 id = rule->h_ext.vlan_tci & VLAN_VID_MASK;
1075                 id_mask = rule->m_ext.vlan_tci & VLAN_VID_MASK;
1076                 cfi = rule->h_ext.vlan_tci & VLAN_CFI_MASK;
1077                 cfi_mask = rule->m_ext.vlan_tci & VLAN_CFI_MASK;
1078                 prio = (rule->h_ext.vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1079                 prio_mask = (rule->m_ext.vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1080
1081                 if (cfi == VLAN_TAG_PRESENT && cfi_mask == VLAN_TAG_PRESENT) {
1082                         vlan |= RQFPR_CFI;
1083                         vlan_mask |= RQFPR_CFI;
1084                 } else if (cfi != VLAN_TAG_PRESENT && cfi_mask == VLAN_TAG_PRESENT) {
1085                         vlan_mask |= RQFPR_CFI;
1086                 }
1087         }
1088
1089         switch (rule->flow_type & ~FLOW_EXT) {
1090         case TCP_V4_FLOW:
1091                 gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_TCP | vlan,
1092                                 RQFPR_IPV4 | RQFPR_TCP | vlan_mask, tab);
1093                 gfar_set_basic_ip(&rule->h_u.tcp_ip4_spec,
1094                                 &rule->m_u.tcp_ip4_spec, tab);
1095                 break;
1096         case UDP_V4_FLOW:
1097                 gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_UDP | vlan,
1098                                 RQFPR_IPV4 | RQFPR_UDP | vlan_mask, tab);
1099                 gfar_set_basic_ip(&rule->h_u.udp_ip4_spec,
1100                                 &rule->m_u.udp_ip4_spec, tab);
1101                 break;
1102         case SCTP_V4_FLOW:
1103                 gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1104                                 tab);
1105                 gfar_set_attribute(132, 0, RQFCR_PID_L4P, tab);
1106                 gfar_set_basic_ip((struct ethtool_tcpip4_spec *) &rule->h_u,
1107                                 (struct ethtool_tcpip4_spec *) &rule->m_u, tab);
1108                 break;
1109         case IP_USER_FLOW:
1110                 gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1111                                 tab);
1112                 gfar_set_user_ip((struct ethtool_usrip4_spec *) &rule->h_u,
1113                                 (struct ethtool_usrip4_spec *) &rule->m_u, tab);
1114                 break;
1115         case ETHER_FLOW:
1116                 if (vlan)
1117                         gfar_set_parse_bits(vlan, vlan_mask, tab);
1118                 gfar_set_ether((struct ethhdr *) &rule->h_u,
1119                                 (struct ethhdr *) &rule->m_u, tab);
1120                 break;
1121         default:
1122                 return -1;
1123         }
1124
1125         /* Set the vlan attributes in the end */
1126         if (vlan) {
1127                 gfar_set_attribute(id, id_mask, RQFCR_PID_VID, tab);
1128                 gfar_set_attribute(prio, prio_mask, RQFCR_PID_PRI, tab);
1129         }
1130
1131         /* If there has been nothing written till now, it must be a default */
1132         if (tab->index == old_index) {
1133                 gfar_set_mask(0xFFFFFFFF, tab);
1134                 tab->fe[tab->index].ctrl = 0x20;
1135                 tab->fe[tab->index].prop = 0x0;
1136                 tab->index++;
1137         }
1138
1139         /* Remove last AND */
1140         tab->fe[tab->index - 1].ctrl &= (~RQFCR_AND);
1141
1142         /* Specify which queue to use or to drop */
1143         if (rule->ring_cookie == RX_CLS_FLOW_DISC)
1144                 tab->fe[tab->index - 1].ctrl |= RQFCR_RJE;
1145         else
1146                 tab->fe[tab->index - 1].ctrl |= (rule->ring_cookie << 10);
1147
1148         /* Only big enough entries can be clustered */
1149         if (tab->index > (old_index + 2)) {
1150                 tab->fe[old_index + 1].ctrl |= RQFCR_CLE;
1151                 tab->fe[tab->index - 1].ctrl |= RQFCR_CLE;
1152         }
1153
1154         /* In rare cases the cache can be full while there is free space in hw */
1155         if (tab->index > MAX_FILER_CACHE_IDX - 1)
1156                 return -EBUSY;
1157
1158         return 0;
1159 }
1160
1161 /* Copy size filer entries */
1162 static void gfar_copy_filer_entries(struct gfar_filer_entry dst[0],
1163                 struct gfar_filer_entry src[0], s32 size)
1164 {
1165         while (size > 0) {
1166                 size--;
1167                 dst[size].ctrl = src[size].ctrl;
1168                 dst[size].prop = src[size].prop;
1169         }
1170 }
1171
1172 /* Delete the contents of the filer-table between start and end
1173  * and collapse them */
1174 static int gfar_trim_filer_entries(u32 begin, u32 end, struct filer_table *tab)
1175 {
1176         int length;
1177         if (end > MAX_FILER_CACHE_IDX || end < begin)
1178                 return -EINVAL;
1179
1180         end++;
1181         length = end - begin;
1182
1183         /* Copy */
1184         while (end < tab->index) {
1185                 tab->fe[begin].ctrl = tab->fe[end].ctrl;
1186                 tab->fe[begin++].prop = tab->fe[end++].prop;
1187
1188         }
1189         /* Fill up with don't cares */
1190         while (begin < tab->index) {
1191                 tab->fe[begin].ctrl = 0x60;
1192                 tab->fe[begin].prop = 0xFFFFFFFF;
1193                 begin++;
1194         }
1195
1196         tab->index -= length;
1197         return 0;
1198 }
1199
1200 /* Make space on the wanted location */
1201 static int gfar_expand_filer_entries(u32 begin, u32 length,
1202                 struct filer_table *tab)
1203 {
1204         if (length == 0 || length + tab->index > MAX_FILER_CACHE_IDX || begin
1205                         > MAX_FILER_CACHE_IDX)
1206                 return -EINVAL;
1207
1208         gfar_copy_filer_entries(&(tab->fe[begin + length]), &(tab->fe[begin]),
1209                         tab->index - length + 1);
1210
1211         tab->index += length;
1212         return 0;
1213 }
1214
1215 static int gfar_get_next_cluster_start(int start, struct filer_table *tab)
1216 {
1217         for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) {
1218                 if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE))
1219                                 == (RQFCR_AND | RQFCR_CLE))
1220                         return start;
1221         }
1222         return -1;
1223 }
1224
1225 static int gfar_get_next_cluster_end(int start, struct filer_table *tab)
1226 {
1227         for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) {
1228                 if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE))
1229                                 == (RQFCR_CLE))
1230                         return start;
1231         }
1232         return -1;
1233 }
1234
1235 /*
1236  * Uses hardwares clustering option to reduce
1237  * the number of filer table entries
1238  */
1239 static void gfar_cluster_filer(struct filer_table *tab)
1240 {
1241         s32 i = -1, j, iend, jend;
1242
1243         while ((i = gfar_get_next_cluster_start(++i, tab)) != -1) {
1244                 j = i;
1245                 while ((j = gfar_get_next_cluster_start(++j, tab)) != -1) {
1246                         /*
1247                          * The cluster entries self and the previous one
1248                          * (a mask) must be identical!
1249                          */
1250                         if (tab->fe[i].ctrl != tab->fe[j].ctrl)
1251                                 break;
1252                         if (tab->fe[i].prop != tab->fe[j].prop)
1253                                 break;
1254                         if (tab->fe[i - 1].ctrl != tab->fe[j - 1].ctrl)
1255                                 break;
1256                         if (tab->fe[i - 1].prop != tab->fe[j - 1].prop)
1257                                 break;
1258                         iend = gfar_get_next_cluster_end(i, tab);
1259                         jend = gfar_get_next_cluster_end(j, tab);
1260                         if (jend == -1 || iend == -1)
1261                                 break;
1262                         /*
1263                          * First we make some free space, where our cluster
1264                          * element should be. Then we copy it there and finally
1265                          * delete in from its old location.
1266                          */
1267
1268                         if (gfar_expand_filer_entries(iend, (jend - j), tab)
1269                                         == -EINVAL)
1270                                 break;
1271
1272                         gfar_copy_filer_entries(&(tab->fe[iend + 1]),
1273                                         &(tab->fe[jend + 1]), jend - j);
1274
1275                         if (gfar_trim_filer_entries(jend - 1,
1276                                         jend + (jend - j), tab) == -EINVAL)
1277                                 return;
1278
1279                         /* Mask out cluster bit */
1280                         tab->fe[iend].ctrl &= ~(RQFCR_CLE);
1281                 }
1282         }
1283 }
1284
1285 /* Swaps the masked bits of a1<>a2 and b1<>b2 */
1286 static void gfar_swap_bits(struct gfar_filer_entry *a1,
1287                 struct gfar_filer_entry *a2, struct gfar_filer_entry *b1,
1288                 struct gfar_filer_entry *b2, u32 mask)
1289 {
1290         u32 temp[4];
1291         temp[0] = a1->ctrl & mask;
1292         temp[1] = a2->ctrl & mask;
1293         temp[2] = b1->ctrl & mask;
1294         temp[3] = b2->ctrl & mask;
1295
1296         a1->ctrl &= ~mask;
1297         a2->ctrl &= ~mask;
1298         b1->ctrl &= ~mask;
1299         b2->ctrl &= ~mask;
1300
1301         a1->ctrl |= temp[1];
1302         a2->ctrl |= temp[0];
1303         b1->ctrl |= temp[3];
1304         b2->ctrl |= temp[2];
1305 }
1306
1307 /*
1308  * Generate a list consisting of masks values with their start and
1309  * end of validity and block as indicator for parts belonging
1310  * together (glued by ANDs) in mask_table
1311  */
1312 static u32 gfar_generate_mask_table(struct gfar_mask_entry *mask_table,
1313                 struct filer_table *tab)
1314 {
1315         u32 i, and_index = 0, block_index = 1;
1316
1317         for (i = 0; i < tab->index; i++) {
1318
1319                 /* LSByte of control = 0 sets a mask */
1320                 if (!(tab->fe[i].ctrl & 0xF)) {
1321                         mask_table[and_index].mask = tab->fe[i].prop;
1322                         mask_table[and_index].start = i;
1323                         mask_table[and_index].block = block_index;
1324                         if (and_index >= 1)
1325                                 mask_table[and_index - 1].end = i - 1;
1326                         and_index++;
1327                 }
1328                 /* cluster starts and ends will be separated because they should
1329                  * hold their position */
1330                 if (tab->fe[i].ctrl & RQFCR_CLE)
1331                         block_index++;
1332                 /* A not set AND indicates the end of a depended block */
1333                 if (!(tab->fe[i].ctrl & RQFCR_AND))
1334                         block_index++;
1335
1336         }
1337
1338         mask_table[and_index - 1].end = i - 1;
1339
1340         return and_index;
1341 }
1342
1343 /*
1344  * Sorts the entries of mask_table by the values of the masks.
1345  * Important: The 0xFF80 flags of the first and last entry of a
1346  * block must hold their position (which queue, CLusterEnable, ReJEct,
1347  * AND)
1348  */
1349 static void gfar_sort_mask_table(struct gfar_mask_entry *mask_table,
1350                 struct filer_table *temp_table, u32 and_index)
1351 {
1352         /* Pointer to compare function (_asc or _desc) */
1353         int (*gfar_comp)(const void *, const void *);
1354
1355         u32 i, size = 0, start = 0, prev = 1;
1356         u32 old_first, old_last, new_first, new_last;
1357
1358         gfar_comp = &gfar_comp_desc;
1359
1360         for (i = 0; i < and_index; i++) {
1361
1362                 if (prev != mask_table[i].block) {
1363                         old_first = mask_table[start].start + 1;
1364                         old_last = mask_table[i - 1].end;
1365                         sort(mask_table + start, size,
1366                                         sizeof(struct gfar_mask_entry),
1367                                         gfar_comp, &gfar_swap);
1368
1369                         /* Toggle order for every block. This makes the
1370                          * thing more efficient! */
1371                         if (gfar_comp == gfar_comp_desc)
1372                                 gfar_comp = &gfar_comp_asc;
1373                         else
1374                                 gfar_comp = &gfar_comp_desc;
1375
1376                         new_first = mask_table[start].start + 1;
1377                         new_last = mask_table[i - 1].end;
1378
1379                         gfar_swap_bits(&temp_table->fe[new_first],
1380                                         &temp_table->fe[old_first],
1381                                         &temp_table->fe[new_last],
1382                                         &temp_table->fe[old_last],
1383                                         RQFCR_QUEUE | RQFCR_CLE |
1384                                                 RQFCR_RJE | RQFCR_AND
1385                                         );
1386
1387                         start = i;
1388                         size = 0;
1389                 }
1390                 size++;
1391                 prev = mask_table[i].block;
1392         }
1393
1394 }
1395
1396 /*
1397  * Reduces the number of masks needed in the filer table to save entries
1398  * This is done by sorting the masks of a depended block. A depended block is
1399  * identified by gluing ANDs or CLE. The sorting order toggles after every
1400  * block. Of course entries in scope of a mask must change their location with
1401  * it.
1402  */
1403 static int gfar_optimize_filer_masks(struct filer_table *tab)
1404 {
1405         struct filer_table *temp_table;
1406         struct gfar_mask_entry *mask_table;
1407
1408         u32 and_index = 0, previous_mask = 0, i = 0, j = 0, size = 0;
1409         s32 ret = 0;
1410
1411         /* We need a copy of the filer table because
1412          * we want to change its order */
1413         temp_table = kmalloc(sizeof(*temp_table), GFP_KERNEL);
1414         if (temp_table == NULL)
1415                 return -ENOMEM;
1416         memcpy(temp_table, tab, sizeof(*temp_table));
1417
1418         mask_table = kcalloc(MAX_FILER_CACHE_IDX / 2 + 1,
1419                         sizeof(struct gfar_mask_entry), GFP_KERNEL);
1420
1421         if (mask_table == NULL) {
1422                 ret = -ENOMEM;
1423                 goto end;
1424         }
1425
1426         and_index = gfar_generate_mask_table(mask_table, tab);
1427
1428         gfar_sort_mask_table(mask_table, temp_table, and_index);
1429
1430         /* Now we can copy the data from our duplicated filer table to
1431          * the real one in the order the mask table says */
1432         for (i = 0; i < and_index; i++) {
1433                 size = mask_table[i].end - mask_table[i].start + 1;
1434                 gfar_copy_filer_entries(&(tab->fe[j]),
1435                                 &(temp_table->fe[mask_table[i].start]), size);
1436                 j += size;
1437         }
1438
1439         /* And finally we just have to check for duplicated masks and drop the
1440          * second ones */
1441         for (i = 0; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1442                 if (tab->fe[i].ctrl == 0x80) {
1443                         previous_mask = i++;
1444                         break;
1445                 }
1446         }
1447         for (; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1448                 if (tab->fe[i].ctrl == 0x80) {
1449                         if (tab->fe[i].prop == tab->fe[previous_mask].prop) {
1450                                 /* Two identical ones found!
1451                                  * So drop the second one! */
1452                                 gfar_trim_filer_entries(i, i, tab);
1453                         } else
1454                                 /* Not identical! */
1455                                 previous_mask = i;
1456                 }
1457         }
1458
1459         kfree(mask_table);
1460 end:    kfree(temp_table);
1461         return ret;
1462 }
1463
1464 /* Write the bit-pattern from software's buffer to hardware registers */
1465 static int gfar_write_filer_table(struct gfar_private *priv,
1466                 struct filer_table *tab)
1467 {
1468         u32 i = 0;
1469         if (tab->index > MAX_FILER_IDX - 1)
1470                 return -EBUSY;
1471
1472         /* Avoid inconsistent filer table to be processed */
1473         lock_rx_qs(priv);
1474
1475         /* Fill regular entries */
1476         for (; i < MAX_FILER_IDX - 1 && (tab->fe[i].ctrl | tab->fe[i].ctrl); i++)
1477                 gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
1478         /* Fill the rest with fall-troughs */
1479         for (; i < MAX_FILER_IDX - 1; i++)
1480                 gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
1481         /* Last entry must be default accept
1482          * because that's what people expect */
1483         gfar_write_filer(priv, i, 0x20, 0x0);
1484
1485         unlock_rx_qs(priv);
1486
1487         return 0;
1488 }
1489
1490 static int gfar_check_capability(struct ethtool_rx_flow_spec *flow,
1491                 struct gfar_private *priv)
1492 {
1493
1494         if (flow->flow_type & FLOW_EXT) {
1495                 if (~flow->m_ext.data[0] || ~flow->m_ext.data[1])
1496                         netdev_warn(priv->ndev,
1497                                         "User-specific data not supported!\n");
1498                 if (~flow->m_ext.vlan_etype)
1499                         netdev_warn(priv->ndev,
1500                                         "VLAN-etype not supported!\n");
1501         }
1502         if (flow->flow_type == IP_USER_FLOW)
1503                 if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
1504                         netdev_warn(priv->ndev,
1505                                         "IP-Version differing from IPv4 not supported!\n");
1506
1507         return 0;
1508 }
1509
1510 static int gfar_process_filer_changes(struct gfar_private *priv)
1511 {
1512         struct ethtool_flow_spec_container *j;
1513         struct filer_table *tab;
1514         s32 i = 0;
1515         s32 ret = 0;
1516
1517         /* So index is set to zero, too! */
1518         tab = kzalloc(sizeof(*tab), GFP_KERNEL);
1519         if (tab == NULL)
1520                 return -ENOMEM;
1521
1522         /* Now convert the existing filer data from flow_spec into
1523          * filer tables binary format */
1524         list_for_each_entry(j, &priv->rx_list.list, list) {
1525                 ret = gfar_convert_to_filer(&j->fs, tab);
1526                 if (ret == -EBUSY) {
1527                         netdev_err(priv->ndev, "Rule not added: No free space!\n");
1528                         goto end;
1529                 }
1530                 if (ret == -1) {
1531                         netdev_err(priv->ndev, "Rule not added: Unsupported Flow-type!\n");
1532                         goto end;
1533                 }
1534         }
1535
1536         i = tab->index;
1537
1538         /* Optimizations to save entries */
1539         gfar_cluster_filer(tab);
1540         gfar_optimize_filer_masks(tab);
1541
1542         pr_debug("\n\tSummary:\n"
1543                 "\tData on hardware: %d\n"
1544                 "\tCompression rate: %d%%\n",
1545                 tab->index, 100 - (100 * tab->index) / i);
1546
1547         /* Write everything to hardware */
1548         ret = gfar_write_filer_table(priv, tab);
1549         if (ret == -EBUSY) {
1550                 netdev_err(priv->ndev, "Rule not added: No free space!\n");
1551                 goto end;
1552         }
1553
1554 end:    kfree(tab);
1555         return ret;
1556 }
1557
1558 static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow)
1559 {
1560         u32 i = 0;
1561
1562         for (i = 0; i < sizeof(flow->m_u); i++)
1563                 flow->m_u.hdata[i] ^= 0xFF;
1564
1565         flow->m_ext.vlan_etype ^= 0xFFFF;
1566         flow->m_ext.vlan_tci ^= 0xFFFF;
1567         flow->m_ext.data[0] ^= ~0;
1568         flow->m_ext.data[1] ^= ~0;
1569 }
1570
1571 static int gfar_add_cls(struct gfar_private *priv,
1572                 struct ethtool_rx_flow_spec *flow)
1573 {
1574         struct ethtool_flow_spec_container *temp, *comp;
1575         int ret = 0;
1576
1577         temp = kmalloc(sizeof(*temp), GFP_KERNEL);
1578         if (temp == NULL)
1579                 return -ENOMEM;
1580         memcpy(&temp->fs, flow, sizeof(temp->fs));
1581
1582         gfar_invert_masks(&temp->fs);
1583         ret = gfar_check_capability(&temp->fs, priv);
1584         if (ret)
1585                 goto clean_mem;
1586         /* Link in the new element at the right @location */
1587         if (list_empty(&priv->rx_list.list)) {
1588                 ret = gfar_check_filer_hardware(priv);
1589                 if (ret != 0)
1590                         goto clean_mem;
1591                 list_add(&temp->list, &priv->rx_list.list);
1592                 goto process;
1593         } else {
1594
1595                 list_for_each_entry(comp, &priv->rx_list.list, list) {
1596                         if (comp->fs.location > flow->location) {
1597                                 list_add_tail(&temp->list, &comp->list);
1598                                 goto process;
1599                         }
1600                         if (comp->fs.location == flow->location) {
1601                                 netdev_err(priv->ndev,
1602                                                 "Rule not added: ID %d not free!\n",
1603                                         flow->location);
1604                                 ret = -EBUSY;
1605                                 goto clean_mem;
1606                         }
1607                 }
1608                 list_add_tail(&temp->list, &priv->rx_list.list);
1609         }
1610
1611 process:
1612         ret = gfar_process_filer_changes(priv);
1613         if (ret)
1614                 goto clean_list;
1615         priv->rx_list.count++;
1616         return ret;
1617
1618 clean_list:
1619         list_del(&temp->list);
1620 clean_mem:
1621         kfree(temp);
1622         return ret;
1623 }
1624
1625 static int gfar_del_cls(struct gfar_private *priv, u32 loc)
1626 {
1627         struct ethtool_flow_spec_container *comp;
1628         u32 ret = -EINVAL;
1629
1630         if (list_empty(&priv->rx_list.list))
1631                 return ret;
1632
1633         list_for_each_entry(comp, &priv->rx_list.list, list) {
1634                 if (comp->fs.location == loc) {
1635                         list_del(&comp->list);
1636                         kfree(comp);
1637                         priv->rx_list.count--;
1638                         gfar_process_filer_changes(priv);
1639                         ret = 0;
1640                         break;
1641                 }
1642         }
1643
1644         return ret;
1645
1646 }
1647
1648 static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
1649 {
1650         struct ethtool_flow_spec_container *comp;
1651         u32 ret = -EINVAL;
1652
1653         list_for_each_entry(comp, &priv->rx_list.list, list) {
1654                 if (comp->fs.location == cmd->fs.location) {
1655                         memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs));
1656                         gfar_invert_masks(&cmd->fs);
1657                         ret = 0;
1658                         break;
1659                 }
1660         }
1661
1662         return ret;
1663 }
1664
1665 static int gfar_get_cls_all(struct gfar_private *priv,
1666                 struct ethtool_rxnfc *cmd, u32 *rule_locs)
1667 {
1668         struct ethtool_flow_spec_container *comp;
1669         u32 i = 0;
1670
1671         list_for_each_entry(comp, &priv->rx_list.list, list) {
1672                 if (i == cmd->rule_cnt)
1673                         return -EMSGSIZE;
1674                 rule_locs[i] = comp->fs.location;
1675                 i++;
1676         }
1677
1678         cmd->data = MAX_FILER_IDX;
1679
1680         return 0;
1681 }
1682
1683 static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
1684 {
1685         struct gfar_private *priv = netdev_priv(dev);
1686         int ret = 0;
1687
1688         mutex_lock(&priv->rx_queue_access);
1689
1690         switch (cmd->cmd) {
1691         case ETHTOOL_SRXFH:
1692                 ret = gfar_set_hash_opts(priv, cmd);
1693                 break;
1694         case ETHTOOL_SRXCLSRLINS:
1695                 if (cmd->fs.ring_cookie != RX_CLS_FLOW_DISC &&
1696                         cmd->fs.ring_cookie >= priv->num_rx_queues) {
1697                         ret = -EINVAL;
1698                         break;
1699                 }
1700                 ret = gfar_add_cls(priv, &cmd->fs);
1701                 break;
1702         case ETHTOOL_SRXCLSRLDEL:
1703                 ret = gfar_del_cls(priv, cmd->fs.location);
1704                 break;
1705         default:
1706                 ret = -EINVAL;
1707         }
1708
1709         mutex_unlock(&priv->rx_queue_access);
1710
1711         return ret;
1712 }
1713
1714 static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
1715                 void *rule_locs)
1716 {
1717         struct gfar_private *priv = netdev_priv(dev);
1718         int ret = 0;
1719
1720         switch (cmd->cmd) {
1721         case ETHTOOL_GRXRINGS:
1722                 cmd->data = priv->num_rx_queues;
1723                 break;
1724         case ETHTOOL_GRXCLSRLCNT:
1725                 cmd->rule_cnt = priv->rx_list.count;
1726                 break;
1727         case ETHTOOL_GRXCLSRULE:
1728                 ret = gfar_get_cls(priv, cmd);
1729                 break;
1730         case ETHTOOL_GRXCLSRLALL:
1731                 ret = gfar_get_cls_all(priv, cmd, (u32 *) rule_locs);
1732                 break;
1733         default:
1734                 ret = -EINVAL;
1735                 break;
1736         }
1737
1738         return ret;
1739 }
1740
1741 const struct ethtool_ops gfar_ethtool_ops = {
1742         .get_settings = gfar_gsettings,
1743         .set_settings = gfar_ssettings,
1744         .get_drvinfo = gfar_gdrvinfo,
1745         .get_regs_len = gfar_reglen,
1746         .get_regs = gfar_get_regs,
1747         .get_link = ethtool_op_get_link,
1748         .get_coalesce = gfar_gcoalesce,
1749         .set_coalesce = gfar_scoalesce,
1750         .get_ringparam = gfar_gringparam,
1751         .set_ringparam = gfar_sringparam,
1752         .get_strings = gfar_gstrings,
1753         .get_sset_count = gfar_sset_count,
1754         .get_ethtool_stats = gfar_fill_stats,
1755         .get_msglevel = gfar_get_msglevel,
1756         .set_msglevel = gfar_set_msglevel,
1757 #ifdef CONFIG_PM
1758         .get_wol = gfar_get_wol,
1759         .set_wol = gfar_set_wol,
1760 #endif
1761         .set_rxnfc = gfar_set_nfc,
1762         .get_rxnfc = gfar_get_nfc,
1763 };