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