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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / ethernet / freescale / gianfar_ethtool.c
blob5a3b2e5b28802d67028212996974bf04d7fd8cca
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, netdev_features_t features)
523 {
524 struct gfar_private *priv = netdev_priv(dev);
525 unsigned long flags;
526 int err = 0, i = 0;
527 netdev_features_t 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 = kmemdup(tab, sizeof(*temp_table), GFP_KERNEL);
1414 if (temp_table == NULL)
1415 return -ENOMEM;
1416
1417 mask_table = kcalloc(MAX_FILER_CACHE_IDX / 2 + 1,
1418 sizeof(struct gfar_mask_entry), GFP_KERNEL);
1419
1420 if (mask_table == NULL) {
1421 ret = -ENOMEM;
1422 goto end;
1423 }
1424
1425 and_index = gfar_generate_mask_table(mask_table, tab);
1426
1427 gfar_sort_mask_table(mask_table, temp_table, and_index);
1428
1429 /* Now we can copy the data from our duplicated filer table to
1430 * the real one in the order the mask table says */
1431 for (i = 0; i < and_index; i++) {
1432 size = mask_table[i].end - mask_table[i].start + 1;
1433 gfar_copy_filer_entries(&(tab->fe[j]),
1434 &(temp_table->fe[mask_table[i].start]), size);
1435 j += size;
1436 }
1437
1438 /* And finally we just have to check for duplicated masks and drop the
1439 * second ones */
1440 for (i = 0; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1441 if (tab->fe[i].ctrl == 0x80) {
1442 previous_mask = i++;
1443 break;
1444 }
1445 }
1446 for (; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1447 if (tab->fe[i].ctrl == 0x80) {
1448 if (tab->fe[i].prop == tab->fe[previous_mask].prop) {
1449 /* Two identical ones found!
1450 * So drop the second one! */
1451 gfar_trim_filer_entries(i, i, tab);
1452 } else
1453 /* Not identical! */
1454 previous_mask = i;
1455 }
1456 }
1457
1458 kfree(mask_table);
1459 end: kfree(temp_table);
1460 return ret;
1461 }
1462
1463 /* Write the bit-pattern from software's buffer to hardware registers */
1464 static int gfar_write_filer_table(struct gfar_private *priv,
1465 struct filer_table *tab)
1466 {
1467 u32 i = 0;
1468 if (tab->index > MAX_FILER_IDX - 1)
1469 return -EBUSY;
1470
1471 /* Avoid inconsistent filer table to be processed */
1472 lock_rx_qs(priv);
1473
1474 /* Fill regular entries */
1475 for (; i < MAX_FILER_IDX - 1 && (tab->fe[i].ctrl | tab->fe[i].ctrl); i++)
1476 gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
1477 /* Fill the rest with fall-troughs */
1478 for (; i < MAX_FILER_IDX - 1; i++)
1479 gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
1480 /* Last entry must be default accept
1481 * because that's what people expect */
1482 gfar_write_filer(priv, i, 0x20, 0x0);
1483
1484 unlock_rx_qs(priv);
1485
1486 return 0;
1487 }
1488
1489 static int gfar_check_capability(struct ethtool_rx_flow_spec *flow,
1490 struct gfar_private *priv)
1491 {
1492
1493 if (flow->flow_type & FLOW_EXT) {
1494 if (~flow->m_ext.data[0] || ~flow->m_ext.data[1])
1495 netdev_warn(priv->ndev,
1496 "User-specific data not supported!\n");
1497 if (~flow->m_ext.vlan_etype)
1498 netdev_warn(priv->ndev,
1499 "VLAN-etype not supported!\n");
1500 }
1501 if (flow->flow_type == IP_USER_FLOW)
1502 if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
1503 netdev_warn(priv->ndev,
1504 "IP-Version differing from IPv4 not supported!\n");
1505
1506 return 0;
1507 }
1508
1509 static int gfar_process_filer_changes(struct gfar_private *priv)
1510 {
1511 struct ethtool_flow_spec_container *j;
1512 struct filer_table *tab;
1513 s32 i = 0;
1514 s32 ret = 0;
1515
1516 /* So index is set to zero, too! */
1517 tab = kzalloc(sizeof(*tab), GFP_KERNEL);
1518 if (tab == NULL)
1519 return -ENOMEM;
1520
1521 /* Now convert the existing filer data from flow_spec into
1522 * filer tables binary format */
1523 list_for_each_entry(j, &priv->rx_list.list, list) {
1524 ret = gfar_convert_to_filer(&j->fs, tab);
1525 if (ret == -EBUSY) {
1526 netdev_err(priv->ndev, "Rule not added: No free space!\n");
1527 goto end;
1528 }
1529 if (ret == -1) {
1530 netdev_err(priv->ndev, "Rule not added: Unsupported Flow-type!\n");
1531 goto end;
1532 }
1533 }
1534
1535 i = tab->index;
1536
1537 /* Optimizations to save entries */
1538 gfar_cluster_filer(tab);
1539 gfar_optimize_filer_masks(tab);
1540
1541 pr_debug("\n\tSummary:\n"
1542 "\tData on hardware: %d\n"
1543 "\tCompression rate: %d%%\n",
1544 tab->index, 100 - (100 * tab->index) / i);
1545
1546 /* Write everything to hardware */
1547 ret = gfar_write_filer_table(priv, tab);
1548 if (ret == -EBUSY) {
1549 netdev_err(priv->ndev, "Rule not added: No free space!\n");
1550 goto end;
1551 }
1552
1553 end: kfree(tab);
1554 return ret;
1555 }
1556
1557 static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow)
1558 {
1559 u32 i = 0;
1560
1561 for (i = 0; i < sizeof(flow->m_u); i++)
1562 flow->m_u.hdata[i] ^= 0xFF;
1563
1564 flow->m_ext.vlan_etype ^= 0xFFFF;
1565 flow->m_ext.vlan_tci ^= 0xFFFF;
1566 flow->m_ext.data[0] ^= ~0;
1567 flow->m_ext.data[1] ^= ~0;
1568 }
1569
1570 static int gfar_add_cls(struct gfar_private *priv,
1571 struct ethtool_rx_flow_spec *flow)
1572 {
1573 struct ethtool_flow_spec_container *temp, *comp;
1574 int ret = 0;
1575
1576 temp = kmalloc(sizeof(*temp), GFP_KERNEL);
1577 if (temp == NULL)
1578 return -ENOMEM;
1579 memcpy(&temp->fs, flow, sizeof(temp->fs));
1580
1581 gfar_invert_masks(&temp->fs);
1582 ret = gfar_check_capability(&temp->fs, priv);
1583 if (ret)
1584 goto clean_mem;
1585 /* Link in the new element at the right @location */
1586 if (list_empty(&priv->rx_list.list)) {
1587 ret = gfar_check_filer_hardware(priv);
1588 if (ret != 0)
1589 goto clean_mem;
1590 list_add(&temp->list, &priv->rx_list.list);
1591 goto process;
1592 } else {
1593
1594 list_for_each_entry(comp, &priv->rx_list.list, list) {
1595 if (comp->fs.location > flow->location) {
1596 list_add_tail(&temp->list, &comp->list);
1597 goto process;
1598 }
1599 if (comp->fs.location == flow->location) {
1600 netdev_err(priv->ndev,
1601 "Rule not added: ID %d not free!\n",
1602 flow->location);
1603 ret = -EBUSY;
1604 goto clean_mem;
1605 }
1606 }
1607 list_add_tail(&temp->list, &priv->rx_list.list);
1608 }
1609
1610 process:
1611 ret = gfar_process_filer_changes(priv);
1612 if (ret)
1613 goto clean_list;
1614 priv->rx_list.count++;
1615 return ret;
1616
1617 clean_list:
1618 list_del(&temp->list);
1619 clean_mem:
1620 kfree(temp);
1621 return ret;
1622 }
1623
1624 static int gfar_del_cls(struct gfar_private *priv, u32 loc)
1625 {
1626 struct ethtool_flow_spec_container *comp;
1627 u32 ret = -EINVAL;
1628
1629 if (list_empty(&priv->rx_list.list))
1630 return ret;
1631
1632 list_for_each_entry(comp, &priv->rx_list.list, list) {
1633 if (comp->fs.location == loc) {
1634 list_del(&comp->list);
1635 kfree(comp);
1636 priv->rx_list.count--;
1637 gfar_process_filer_changes(priv);
1638 ret = 0;
1639 break;
1640 }
1641 }
1642
1643 return ret;
1644
1645 }
1646
1647 static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
1648 {
1649 struct ethtool_flow_spec_container *comp;
1650 u32 ret = -EINVAL;
1651
1652 list_for_each_entry(comp, &priv->rx_list.list, list) {
1653 if (comp->fs.location == cmd->fs.location) {
1654 memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs));
1655 gfar_invert_masks(&cmd->fs);
1656 ret = 0;
1657 break;
1658 }
1659 }
1660
1661 return ret;
1662 }
1663
1664 static int gfar_get_cls_all(struct gfar_private *priv,
1665 struct ethtool_rxnfc *cmd, u32 *rule_locs)
1666 {
1667 struct ethtool_flow_spec_container *comp;
1668 u32 i = 0;
1669
1670 list_for_each_entry(comp, &priv->rx_list.list, list) {
1671 if (i == cmd->rule_cnt)
1672 return -EMSGSIZE;
1673 rule_locs[i] = comp->fs.location;
1674 i++;
1675 }
1676
1677 cmd->data = MAX_FILER_IDX;
1678 cmd->rule_cnt = i;
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 cmd->fs.location >= MAX_FILER_IDX) {
1698 ret = -EINVAL;
1699 break;
1700 }
1701 ret = gfar_add_cls(priv, &cmd->fs);
1702 break;
1703 case ETHTOOL_SRXCLSRLDEL:
1704 ret = gfar_del_cls(priv, cmd->fs.location);
1705 break;
1706 default:
1707 ret = -EINVAL;
1708 }
1709
1710 mutex_unlock(&priv->rx_queue_access);
1711
1712 return ret;
1713 }
1714
1715 static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
1716 u32 *rule_locs)
1717 {
1718 struct gfar_private *priv = netdev_priv(dev);
1719 int ret = 0;
1720
1721 switch (cmd->cmd) {
1722 case ETHTOOL_GRXRINGS:
1723 cmd->data = priv->num_rx_queues;
1724 break;
1725 case ETHTOOL_GRXCLSRLCNT:
1726 cmd->rule_cnt = priv->rx_list.count;
1727 break;
1728 case ETHTOOL_GRXCLSRULE:
1729 ret = gfar_get_cls(priv, cmd);
1730 break;
1731 case ETHTOOL_GRXCLSRLALL:
1732 ret = gfar_get_cls_all(priv, cmd, rule_locs);
1733 break;
1734 default:
1735 ret = -EINVAL;
1736 break;
1737 }
1738
1739 return ret;
1740 }
1741
1742 const struct ethtool_ops gfar_ethtool_ops = {
1743 .get_settings = gfar_gsettings,
1744 .set_settings = gfar_ssettings,
1745 .get_drvinfo = gfar_gdrvinfo,
1746 .get_regs_len = gfar_reglen,
1747 .get_regs = gfar_get_regs,
1748 .get_link = ethtool_op_get_link,
1749 .get_coalesce = gfar_gcoalesce,
1750 .set_coalesce = gfar_scoalesce,
1751 .get_ringparam = gfar_gringparam,
1752 .set_ringparam = gfar_sringparam,
1753 .get_strings = gfar_gstrings,
1754 .get_sset_count = gfar_sset_count,
1755 .get_ethtool_stats = gfar_fill_stats,
1756 .get_msglevel = gfar_get_msglevel,
1757 .set_msglevel = gfar_set_msglevel,
1758 #ifdef CONFIG_PM
1759 .get_wol = gfar_get_wol,
1760 .set_wol = gfar_set_wol,
1761 #endif
1762 .set_rxnfc = gfar_set_nfc,
1763 .get_rxnfc = gfar_get_nfc,
1764 };