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