xref: /linux/drivers/net/ethernet/freescale/gianfar_ethtool.c (revision 9208c05f9fdfd927ea160b97dfef3c379049fff2)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  drivers/net/ethernet/freescale/gianfar_ethtool.c
4  *
5  *  Gianfar Ethernet Driver
6  *  Ethtool support for Gianfar Enet
7  *  Based on e1000 ethtool support
8  *
9  *  Author: Andy Fleming
10  *  Maintainer: Kumar Gala
11  *  Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
12  *
13  *  Copyright 2003-2006, 2008-2009, 2011 Freescale Semiconductor, Inc.
14  */
15 
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17 
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/interrupt.h>
22 #include <linux/delay.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/net_tstamp.h>
26 #include <linux/skbuff.h>
27 #include <linux/spinlock.h>
28 #include <linux/mm.h>
29 
30 #include <asm/io.h>
31 #include <asm/irq.h>
32 #include <linux/uaccess.h>
33 #include <linux/module.h>
34 #include <linux/crc32.h>
35 #include <asm/types.h>
36 #include <linux/ethtool.h>
37 #include <linux/mii.h>
38 #include <linux/phy.h>
39 #include <linux/sort.h>
40 #include <linux/if_vlan.h>
41 #include <linux/of.h>
42 #include <linux/of_platform.h>
43 #include <linux/platform_device.h>
44 #include <linux/fsl/ptp_qoriq.h>
45 
46 #include "gianfar.h"
47 
48 #define GFAR_MAX_COAL_USECS 0xffff
49 #define GFAR_MAX_COAL_FRAMES 0xff
50 
51 static const char stat_gstrings[][ETH_GSTRING_LEN] = {
52 	/* extra stats */
53 	"rx-allocation-errors",
54 	"rx-large-frame-errors",
55 	"rx-short-frame-errors",
56 	"rx-non-octet-errors",
57 	"rx-crc-errors",
58 	"rx-overrun-errors",
59 	"rx-busy-errors",
60 	"rx-babbling-errors",
61 	"rx-truncated-frames",
62 	"ethernet-bus-error",
63 	"tx-babbling-errors",
64 	"tx-underrun-errors",
65 	"tx-timeout-errors",
66 	/* rmon stats */
67 	"tx-rx-64-frames",
68 	"tx-rx-65-127-frames",
69 	"tx-rx-128-255-frames",
70 	"tx-rx-256-511-frames",
71 	"tx-rx-512-1023-frames",
72 	"tx-rx-1024-1518-frames",
73 	"tx-rx-1519-1522-good-vlan",
74 	"rx-bytes",
75 	"rx-packets",
76 	"rx-fcs-errors",
77 	"receive-multicast-packet",
78 	"receive-broadcast-packet",
79 	"rx-control-frame-packets",
80 	"rx-pause-frame-packets",
81 	"rx-unknown-op-code",
82 	"rx-alignment-error",
83 	"rx-frame-length-error",
84 	"rx-code-error",
85 	"rx-carrier-sense-error",
86 	"rx-undersize-packets",
87 	"rx-oversize-packets",
88 	"rx-fragmented-frames",
89 	"rx-jabber-frames",
90 	"rx-dropped-frames",
91 	"tx-byte-counter",
92 	"tx-packets",
93 	"tx-multicast-packets",
94 	"tx-broadcast-packets",
95 	"tx-pause-control-frames",
96 	"tx-deferral-packets",
97 	"tx-excessive-deferral-packets",
98 	"tx-single-collision-packets",
99 	"tx-multiple-collision-packets",
100 	"tx-late-collision-packets",
101 	"tx-excessive-collision-packets",
102 	"tx-total-collision",
103 	"reserved",
104 	"tx-dropped-frames",
105 	"tx-jabber-frames",
106 	"tx-fcs-errors",
107 	"tx-control-frames",
108 	"tx-oversize-frames",
109 	"tx-undersize-frames",
110 	"tx-fragmented-frames",
111 };
112 
113 /* Fill in a buffer with the strings which correspond to the
114  * stats */
115 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
116 {
117 	struct gfar_private *priv = netdev_priv(dev);
118 	int i;
119 
120 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
121 		for (i = 0; i < GFAR_STATS_LEN; i++)
122 			ethtool_puts(&buf, stat_gstrings[i]);
123 	else
124 		for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
125 			ethtool_puts(&buf, stat_gstrings[i]);
126 }
127 
128 /* Fill in an array of 64-bit statistics from various sources.
129  * This array will be appended to the end of the ethtool_stats
130  * structure, and returned to user space
131  */
132 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
133 			    u64 *buf)
134 {
135 	int i;
136 	struct gfar_private *priv = netdev_priv(dev);
137 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
138 	atomic64_t *extra = (atomic64_t *)&priv->extra_stats;
139 
140 	for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
141 		buf[i] = atomic64_read(&extra[i]);
142 
143 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
144 		u32 __iomem *rmon = (u32 __iomem *) &regs->rmon;
145 
146 		for (; i < GFAR_STATS_LEN; i++, rmon++)
147 			buf[i] = (u64) gfar_read(rmon);
148 	}
149 }
150 
151 static int gfar_sset_count(struct net_device *dev, int sset)
152 {
153 	struct gfar_private *priv = netdev_priv(dev);
154 
155 	switch (sset) {
156 	case ETH_SS_STATS:
157 		if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
158 			return GFAR_STATS_LEN;
159 		else
160 			return GFAR_EXTRA_STATS_LEN;
161 	default:
162 		return -EOPNOTSUPP;
163 	}
164 }
165 
166 /* Fills in the drvinfo structure with some basic info */
167 static void gfar_gdrvinfo(struct net_device *dev,
168 			  struct ethtool_drvinfo *drvinfo)
169 {
170 	strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
171 }
172 
173 /* Return the length of the register structure */
174 static int gfar_reglen(struct net_device *dev)
175 {
176 	return sizeof (struct gfar);
177 }
178 
179 /* Return a dump of the GFAR register space */
180 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs,
181 			  void *regbuf)
182 {
183 	int i;
184 	struct gfar_private *priv = netdev_priv(dev);
185 	u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp[0].regs;
186 	u32 *buf = (u32 *) regbuf;
187 
188 	for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
189 		buf[i] = gfar_read(&theregs[i]);
190 }
191 
192 /* Convert microseconds to ethernet clock ticks, which changes
193  * depending on what speed the controller is running at */
194 static unsigned int gfar_usecs2ticks(struct gfar_private *priv,
195 				     unsigned int usecs)
196 {
197 	struct net_device *ndev = priv->ndev;
198 	struct phy_device *phydev = ndev->phydev;
199 	unsigned int count;
200 
201 	/* The timer is different, depending on the interface speed */
202 	switch (phydev->speed) {
203 	case SPEED_1000:
204 		count = GFAR_GBIT_TIME;
205 		break;
206 	case SPEED_100:
207 		count = GFAR_100_TIME;
208 		break;
209 	case SPEED_10:
210 	default:
211 		count = GFAR_10_TIME;
212 		break;
213 	}
214 
215 	/* Make sure we return a number greater than 0
216 	 * if usecs > 0 */
217 	return DIV_ROUND_UP(usecs * 1000, count);
218 }
219 
220 /* Convert ethernet clock ticks to microseconds */
221 static unsigned int gfar_ticks2usecs(struct gfar_private *priv,
222 				     unsigned int ticks)
223 {
224 	struct net_device *ndev = priv->ndev;
225 	struct phy_device *phydev = ndev->phydev;
226 	unsigned int count;
227 
228 	/* The timer is different, depending on the interface speed */
229 	switch (phydev->speed) {
230 	case SPEED_1000:
231 		count = GFAR_GBIT_TIME;
232 		break;
233 	case SPEED_100:
234 		count = GFAR_100_TIME;
235 		break;
236 	case SPEED_10:
237 	default:
238 		count = GFAR_10_TIME;
239 		break;
240 	}
241 
242 	/* Make sure we return a number greater than 0 */
243 	/* if ticks is > 0 */
244 	return (ticks * count) / 1000;
245 }
246 
247 /* Get the coalescing parameters, and put them in the cvals
248  * structure.  */
249 static int gfar_gcoalesce(struct net_device *dev,
250 			  struct ethtool_coalesce *cvals,
251 			  struct kernel_ethtool_coalesce *kernel_coal,
252 			  struct netlink_ext_ack *extack)
253 {
254 	struct gfar_private *priv = netdev_priv(dev);
255 	struct gfar_priv_rx_q *rx_queue = NULL;
256 	struct gfar_priv_tx_q *tx_queue = NULL;
257 	unsigned long rxtime;
258 	unsigned long rxcount;
259 	unsigned long txtime;
260 	unsigned long txcount;
261 
262 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
263 		return -EOPNOTSUPP;
264 
265 	if (!dev->phydev)
266 		return -ENODEV;
267 
268 	rx_queue = priv->rx_queue[0];
269 	tx_queue = priv->tx_queue[0];
270 
271 	rxtime  = get_ictt_value(rx_queue->rxic);
272 	rxcount = get_icft_value(rx_queue->rxic);
273 	txtime  = get_ictt_value(tx_queue->txic);
274 	txcount = get_icft_value(tx_queue->txic);
275 	cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, rxtime);
276 	cvals->rx_max_coalesced_frames = rxcount;
277 
278 	cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, txtime);
279 	cvals->tx_max_coalesced_frames = txcount;
280 
281 	return 0;
282 }
283 
284 /* Change the coalescing values.
285  * Both cvals->*_usecs and cvals->*_frames have to be > 0
286  * in order for coalescing to be active
287  */
288 static int gfar_scoalesce(struct net_device *dev,
289 			  struct ethtool_coalesce *cvals,
290 			  struct kernel_ethtool_coalesce *kernel_coal,
291 			  struct netlink_ext_ack *extack)
292 {
293 	struct gfar_private *priv = netdev_priv(dev);
294 	int i, err = 0;
295 
296 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
297 		return -EOPNOTSUPP;
298 
299 	if (!dev->phydev)
300 		return -ENODEV;
301 
302 	/* Check the bounds of the values */
303 	if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
304 		netdev_info(dev, "Coalescing is limited to %d microseconds\n",
305 			    GFAR_MAX_COAL_USECS);
306 		return -EINVAL;
307 	}
308 
309 	if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
310 		netdev_info(dev, "Coalescing is limited to %d frames\n",
311 			    GFAR_MAX_COAL_FRAMES);
312 		return -EINVAL;
313 	}
314 
315 	/* Check the bounds of the values */
316 	if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
317 		netdev_info(dev, "Coalescing is limited to %d microseconds\n",
318 			    GFAR_MAX_COAL_USECS);
319 		return -EINVAL;
320 	}
321 
322 	if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
323 		netdev_info(dev, "Coalescing is limited to %d frames\n",
324 			    GFAR_MAX_COAL_FRAMES);
325 		return -EINVAL;
326 	}
327 
328 	while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state))
329 		cpu_relax();
330 
331 	/* Set up rx coalescing */
332 	if ((cvals->rx_coalesce_usecs == 0) ||
333 	    (cvals->rx_max_coalesced_frames == 0)) {
334 		for (i = 0; i < priv->num_rx_queues; i++)
335 			priv->rx_queue[i]->rxcoalescing = 0;
336 	} else {
337 		for (i = 0; i < priv->num_rx_queues; i++)
338 			priv->rx_queue[i]->rxcoalescing = 1;
339 	}
340 
341 	for (i = 0; i < priv->num_rx_queues; i++) {
342 		priv->rx_queue[i]->rxic = mk_ic_value(
343 			cvals->rx_max_coalesced_frames,
344 			gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
345 	}
346 
347 	/* Set up tx coalescing */
348 	if ((cvals->tx_coalesce_usecs == 0) ||
349 	    (cvals->tx_max_coalesced_frames == 0)) {
350 		for (i = 0; i < priv->num_tx_queues; i++)
351 			priv->tx_queue[i]->txcoalescing = 0;
352 	} else {
353 		for (i = 0; i < priv->num_tx_queues; i++)
354 			priv->tx_queue[i]->txcoalescing = 1;
355 	}
356 
357 	for (i = 0; i < priv->num_tx_queues; i++) {
358 		priv->tx_queue[i]->txic = mk_ic_value(
359 			cvals->tx_max_coalesced_frames,
360 			gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
361 	}
362 
363 	if (dev->flags & IFF_UP) {
364 		stop_gfar(dev);
365 		err = startup_gfar(dev);
366 	} else {
367 		gfar_mac_reset(priv);
368 	}
369 
370 	clear_bit_unlock(GFAR_RESETTING, &priv->state);
371 
372 	return err;
373 }
374 
375 /* Fills in rvals with the current ring parameters.  Currently,
376  * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
377  * jumbo are ignored by the driver */
378 static void gfar_gringparam(struct net_device *dev,
379 			    struct ethtool_ringparam *rvals,
380 			    struct kernel_ethtool_ringparam *kernel_rvals,
381 			    struct netlink_ext_ack *extack)
382 {
383 	struct gfar_private *priv = netdev_priv(dev);
384 	struct gfar_priv_tx_q *tx_queue = NULL;
385 	struct gfar_priv_rx_q *rx_queue = NULL;
386 
387 	tx_queue = priv->tx_queue[0];
388 	rx_queue = priv->rx_queue[0];
389 
390 	rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
391 	rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
392 	rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
393 	rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
394 
395 	/* Values changeable by the user.  The valid values are
396 	 * in the range 1 to the "*_max_pending" counterpart above.
397 	 */
398 	rvals->rx_pending = rx_queue->rx_ring_size;
399 	rvals->rx_mini_pending = rx_queue->rx_ring_size;
400 	rvals->rx_jumbo_pending = rx_queue->rx_ring_size;
401 	rvals->tx_pending = tx_queue->tx_ring_size;
402 }
403 
404 /* Change the current ring parameters, stopping the controller if
405  * necessary so that we don't mess things up while we're in motion.
406  */
407 static int gfar_sringparam(struct net_device *dev,
408 			   struct ethtool_ringparam *rvals,
409 			   struct kernel_ethtool_ringparam *kernel_rvals,
410 			   struct netlink_ext_ack *extack)
411 {
412 	struct gfar_private *priv = netdev_priv(dev);
413 	int err = 0, i;
414 
415 	if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
416 		return -EINVAL;
417 
418 	if (!is_power_of_2(rvals->rx_pending)) {
419 		netdev_err(dev, "Ring sizes must be a power of 2\n");
420 		return -EINVAL;
421 	}
422 
423 	if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
424 		return -EINVAL;
425 
426 	if (!is_power_of_2(rvals->tx_pending)) {
427 		netdev_err(dev, "Ring sizes must be a power of 2\n");
428 		return -EINVAL;
429 	}
430 
431 	while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state))
432 		cpu_relax();
433 
434 	if (dev->flags & IFF_UP)
435 		stop_gfar(dev);
436 
437 	/* Change the sizes */
438 	for (i = 0; i < priv->num_rx_queues; i++)
439 		priv->rx_queue[i]->rx_ring_size = rvals->rx_pending;
440 
441 	for (i = 0; i < priv->num_tx_queues; i++)
442 		priv->tx_queue[i]->tx_ring_size = rvals->tx_pending;
443 
444 	/* Rebuild the rings with the new size */
445 	if (dev->flags & IFF_UP)
446 		err = startup_gfar(dev);
447 
448 	clear_bit_unlock(GFAR_RESETTING, &priv->state);
449 
450 	return err;
451 }
452 
453 static void gfar_gpauseparam(struct net_device *dev,
454 			     struct ethtool_pauseparam *epause)
455 {
456 	struct gfar_private *priv = netdev_priv(dev);
457 
458 	epause->autoneg = !!priv->pause_aneg_en;
459 	epause->rx_pause = !!priv->rx_pause_en;
460 	epause->tx_pause = !!priv->tx_pause_en;
461 }
462 
463 static int gfar_spauseparam(struct net_device *dev,
464 			    struct ethtool_pauseparam *epause)
465 {
466 	struct gfar_private *priv = netdev_priv(dev);
467 	struct phy_device *phydev = dev->phydev;
468 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
469 
470 	if (!phydev)
471 		return -ENODEV;
472 
473 	if (!phy_validate_pause(phydev, epause))
474 		return -EINVAL;
475 
476 	priv->rx_pause_en = priv->tx_pause_en = 0;
477 	phy_set_asym_pause(phydev, epause->rx_pause, epause->tx_pause);
478 	if (epause->rx_pause) {
479 		priv->rx_pause_en = 1;
480 
481 		if (epause->tx_pause) {
482 			priv->tx_pause_en = 1;
483 		}
484 	} else if (epause->tx_pause) {
485 		priv->tx_pause_en = 1;
486 	}
487 
488 	if (epause->autoneg)
489 		priv->pause_aneg_en = 1;
490 	else
491 		priv->pause_aneg_en = 0;
492 
493 	if (!epause->autoneg) {
494 		u32 tempval = gfar_read(&regs->maccfg1);
495 
496 		tempval &= ~(MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
497 
498 		priv->tx_actual_en = 0;
499 		if (priv->tx_pause_en) {
500 			priv->tx_actual_en = 1;
501 			tempval |= MACCFG1_TX_FLOW;
502 		}
503 
504 		if (priv->rx_pause_en)
505 			tempval |= MACCFG1_RX_FLOW;
506 		gfar_write(&regs->maccfg1, tempval);
507 	}
508 
509 	return 0;
510 }
511 
512 int gfar_set_features(struct net_device *dev, netdev_features_t features)
513 {
514 	netdev_features_t changed = dev->features ^ features;
515 	struct gfar_private *priv = netdev_priv(dev);
516 	int err = 0;
517 
518 	if (!(changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
519 			 NETIF_F_RXCSUM)))
520 		return 0;
521 
522 	while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state))
523 		cpu_relax();
524 
525 	dev->features = features;
526 
527 	if (dev->flags & IFF_UP) {
528 		/* Now we take down the rings to rebuild them */
529 		stop_gfar(dev);
530 		err = startup_gfar(dev);
531 	} else {
532 		gfar_mac_reset(priv);
533 	}
534 
535 	clear_bit_unlock(GFAR_RESETTING, &priv->state);
536 
537 	return err;
538 }
539 
540 static uint32_t gfar_get_msglevel(struct net_device *dev)
541 {
542 	struct gfar_private *priv = netdev_priv(dev);
543 
544 	return priv->msg_enable;
545 }
546 
547 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
548 {
549 	struct gfar_private *priv = netdev_priv(dev);
550 
551 	priv->msg_enable = data;
552 }
553 
554 #ifdef CONFIG_PM
555 static void gfar_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
556 {
557 	struct gfar_private *priv = netdev_priv(dev);
558 
559 	wol->supported = 0;
560 	wol->wolopts = 0;
561 
562 	if (priv->wol_supported & GFAR_WOL_MAGIC)
563 		wol->supported |= WAKE_MAGIC;
564 
565 	if (priv->wol_supported & GFAR_WOL_FILER_UCAST)
566 		wol->supported |= WAKE_UCAST;
567 
568 	if (priv->wol_opts & GFAR_WOL_MAGIC)
569 		wol->wolopts |= WAKE_MAGIC;
570 
571 	if (priv->wol_opts & GFAR_WOL_FILER_UCAST)
572 		wol->wolopts |= WAKE_UCAST;
573 }
574 
575 static int gfar_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
576 {
577 	struct gfar_private *priv = netdev_priv(dev);
578 	u16 wol_opts = 0;
579 	int err;
580 
581 	if (!priv->wol_supported && wol->wolopts)
582 		return -EINVAL;
583 
584 	if (wol->wolopts & ~(WAKE_MAGIC | WAKE_UCAST))
585 		return -EINVAL;
586 
587 	if (wol->wolopts & WAKE_MAGIC) {
588 		wol_opts |= GFAR_WOL_MAGIC;
589 	} else {
590 		if (wol->wolopts & WAKE_UCAST)
591 			wol_opts |= GFAR_WOL_FILER_UCAST;
592 	}
593 
594 	wol_opts &= priv->wol_supported;
595 	priv->wol_opts = 0;
596 
597 	err = device_set_wakeup_enable(priv->dev, wol_opts);
598 	if (err)
599 		return err;
600 
601 	priv->wol_opts = wol_opts;
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_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,
683 				       u64 class)
684 {
685 	unsigned int cmp_rqfpr;
686 	unsigned int *local_rqfpr;
687 	unsigned int *local_rqfcr;
688 	int i = 0x0, k = 0x0;
689 	int j = MAX_FILER_IDX, l = 0x0;
690 	int ret = 1;
691 
692 	local_rqfpr = kmalloc_array(MAX_FILER_IDX + 1, sizeof(unsigned int),
693 				    GFP_KERNEL);
694 	local_rqfcr = kmalloc_array(MAX_FILER_IDX + 1, sizeof(unsigned int),
695 				    GFP_KERNEL);
696 	if (!local_rqfpr || !local_rqfcr) {
697 		ret = 0;
698 		goto err;
699 	}
700 
701 	switch (class) {
702 	case TCP_V4_FLOW:
703 		cmp_rqfpr = RQFPR_IPV4 |RQFPR_TCP;
704 		break;
705 	case UDP_V4_FLOW:
706 		cmp_rqfpr = RQFPR_IPV4 |RQFPR_UDP;
707 		break;
708 	case TCP_V6_FLOW:
709 		cmp_rqfpr = RQFPR_IPV6 |RQFPR_TCP;
710 		break;
711 	case UDP_V6_FLOW:
712 		cmp_rqfpr = RQFPR_IPV6 |RQFPR_UDP;
713 		break;
714 	default:
715 		netdev_err(priv->ndev,
716 			   "Right now this class is not supported\n");
717 		ret = 0;
718 		goto err;
719 	}
720 
721 	for (i = 0; i < MAX_FILER_IDX + 1; i++) {
722 		local_rqfpr[j] = priv->ftp_rqfpr[i];
723 		local_rqfcr[j] = priv->ftp_rqfcr[i];
724 		j--;
725 		if ((priv->ftp_rqfcr[i] ==
726 		     (RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND)) &&
727 		    (priv->ftp_rqfpr[i] == cmp_rqfpr))
728 			break;
729 	}
730 
731 	if (i == MAX_FILER_IDX + 1) {
732 		netdev_err(priv->ndev,
733 			   "No parse rule found, can't create hash rules\n");
734 		ret = 0;
735 		goto err;
736 	}
737 
738 	/* If a match was found, then it begins the starting of a cluster rule
739 	 * if it was already programmed, we need to overwrite these rules
740 	 */
741 	for (l = i+1; l < MAX_FILER_IDX; l++) {
742 		if ((priv->ftp_rqfcr[l] & RQFCR_CLE) &&
743 		    !(priv->ftp_rqfcr[l] & RQFCR_AND)) {
744 			priv->ftp_rqfcr[l] = RQFCR_CLE | RQFCR_CMP_EXACT |
745 					     RQFCR_HASHTBL_0 | RQFCR_PID_MASK;
746 			priv->ftp_rqfpr[l] = FPR_FILER_MASK;
747 			gfar_write_filer(priv, l, priv->ftp_rqfcr[l],
748 					 priv->ftp_rqfpr[l]);
749 			break;
750 		}
751 
752 		if (!(priv->ftp_rqfcr[l] & RQFCR_CLE) &&
753 			(priv->ftp_rqfcr[l] & RQFCR_AND))
754 			continue;
755 		else {
756 			local_rqfpr[j] = priv->ftp_rqfpr[l];
757 			local_rqfcr[j] = priv->ftp_rqfcr[l];
758 			j--;
759 		}
760 	}
761 
762 	priv->cur_filer_idx = l - 1;
763 
764 	/* hash rules */
765 	ethflow_to_filer_rules(priv, ethflow);
766 
767 	/* Write back the popped out rules again */
768 	for (k = j+1; k < MAX_FILER_IDX; k++) {
769 		priv->ftp_rqfpr[priv->cur_filer_idx] = local_rqfpr[k];
770 		priv->ftp_rqfcr[priv->cur_filer_idx] = local_rqfcr[k];
771 		gfar_write_filer(priv, priv->cur_filer_idx,
772 				 local_rqfcr[k], local_rqfpr[k]);
773 		if (!priv->cur_filer_idx)
774 			break;
775 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
776 	}
777 
778 err:
779 	kfree(local_rqfcr);
780 	kfree(local_rqfpr);
781 	return ret;
782 }
783 
784 static int gfar_set_hash_opts(struct gfar_private *priv,
785 			      struct ethtool_rxnfc *cmd)
786 {
787 	/* write the filer rules here */
788 	if (!gfar_ethflow_to_filer_table(priv, cmd->data, cmd->flow_type))
789 		return -EINVAL;
790 
791 	return 0;
792 }
793 
794 static int gfar_check_filer_hardware(struct gfar_private *priv)
795 {
796 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
797 	u32 i;
798 
799 	/* Check if we are in FIFO mode */
800 	i = gfar_read(&regs->ecntrl);
801 	i &= ECNTRL_FIFM;
802 	if (i == ECNTRL_FIFM) {
803 		netdev_notice(priv->ndev, "Interface in FIFO mode\n");
804 		i = gfar_read(&regs->rctrl);
805 		i &= RCTRL_PRSDEP_MASK | RCTRL_PRSFM;
806 		if (i == (RCTRL_PRSDEP_MASK | RCTRL_PRSFM)) {
807 			netdev_info(priv->ndev,
808 				    "Receive Queue Filtering enabled\n");
809 		} else {
810 			netdev_warn(priv->ndev,
811 				    "Receive Queue Filtering disabled\n");
812 			return -EOPNOTSUPP;
813 		}
814 	}
815 	/* Or in standard mode */
816 	else {
817 		i = gfar_read(&regs->rctrl);
818 		i &= RCTRL_PRSDEP_MASK;
819 		if (i == RCTRL_PRSDEP_MASK) {
820 			netdev_info(priv->ndev,
821 				    "Receive Queue Filtering enabled\n");
822 		} else {
823 			netdev_warn(priv->ndev,
824 				    "Receive Queue Filtering disabled\n");
825 			return -EOPNOTSUPP;
826 		}
827 	}
828 
829 	/* Sets the properties for arbitrary filer rule
830 	 * to the first 4 Layer 4 Bytes
831 	 */
832 	gfar_write(&regs->rbifx, 0xC0C1C2C3);
833 	return 0;
834 }
835 
836 /* Write a mask to filer cache */
837 static void gfar_set_mask(u32 mask, struct filer_table *tab)
838 {
839 	tab->fe[tab->index].ctrl = RQFCR_AND | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
840 	tab->fe[tab->index].prop = mask;
841 	tab->index++;
842 }
843 
844 /* Sets parse bits (e.g. IP or TCP) */
845 static void gfar_set_parse_bits(u32 value, u32 mask, struct filer_table *tab)
846 {
847 	gfar_set_mask(mask, tab);
848 	tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_PID_PARSE |
849 				   RQFCR_AND;
850 	tab->fe[tab->index].prop = value;
851 	tab->index++;
852 }
853 
854 static void gfar_set_general_attribute(u32 value, u32 mask, u32 flag,
855 				       struct filer_table *tab)
856 {
857 	gfar_set_mask(mask, tab);
858 	tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_AND | flag;
859 	tab->fe[tab->index].prop = value;
860 	tab->index++;
861 }
862 
863 /* For setting a tuple of value and mask of type flag
864  * Example:
865  * IP-Src = 10.0.0.0/255.0.0.0
866  * value: 0x0A000000 mask: FF000000 flag: RQFPR_IPV4
867  *
868  * Ethtool gives us a value=0 and mask=~0 for don't care a tuple
869  * For a don't care mask it gives us a 0
870  *
871  * The check if don't care and the mask adjustment if mask=0 is done for VLAN
872  * and MAC stuff on an upper level (due to missing information on this level).
873  * For these guys we can discard them if they are value=0 and mask=0.
874  *
875  * Further the all masks are one-padded for better hardware efficiency.
876  */
877 static void gfar_set_attribute(u32 value, u32 mask, u32 flag,
878 			       struct filer_table *tab)
879 {
880 	switch (flag) {
881 		/* 3bit */
882 	case RQFCR_PID_PRI:
883 		if (!(value | mask))
884 			return;
885 		mask |= RQFCR_PID_PRI_MASK;
886 		break;
887 		/* 8bit */
888 	case RQFCR_PID_L4P:
889 	case RQFCR_PID_TOS:
890 		if (!~(mask | RQFCR_PID_L4P_MASK))
891 			return;
892 		if (!mask)
893 			mask = ~0;
894 		else
895 			mask |= RQFCR_PID_L4P_MASK;
896 		break;
897 		/* 12bit */
898 	case RQFCR_PID_VID:
899 		if (!(value | mask))
900 			return;
901 		mask |= RQFCR_PID_VID_MASK;
902 		break;
903 		/* 16bit */
904 	case RQFCR_PID_DPT:
905 	case RQFCR_PID_SPT:
906 	case RQFCR_PID_ETY:
907 		if (!~(mask | RQFCR_PID_PORT_MASK))
908 			return;
909 		if (!mask)
910 			mask = ~0;
911 		else
912 			mask |= RQFCR_PID_PORT_MASK;
913 		break;
914 		/* 24bit */
915 	case RQFCR_PID_DAH:
916 	case RQFCR_PID_DAL:
917 	case RQFCR_PID_SAH:
918 	case RQFCR_PID_SAL:
919 		if (!(value | mask))
920 			return;
921 		mask |= RQFCR_PID_MAC_MASK;
922 		break;
923 		/* for all real 32bit masks */
924 	default:
925 		if (!~mask)
926 			return;
927 		if (!mask)
928 			mask = ~0;
929 		break;
930 	}
931 	gfar_set_general_attribute(value, mask, flag, tab);
932 }
933 
934 /* Translates value and mask for UDP, TCP or SCTP */
935 static void gfar_set_basic_ip(struct ethtool_tcpip4_spec *value,
936 			      struct ethtool_tcpip4_spec *mask,
937 			      struct filer_table *tab)
938 {
939 	gfar_set_attribute(be32_to_cpu(value->ip4src),
940 			   be32_to_cpu(mask->ip4src),
941 			   RQFCR_PID_SIA, tab);
942 	gfar_set_attribute(be32_to_cpu(value->ip4dst),
943 			   be32_to_cpu(mask->ip4dst),
944 			   RQFCR_PID_DIA, tab);
945 	gfar_set_attribute(be16_to_cpu(value->pdst),
946 			   be16_to_cpu(mask->pdst),
947 			   RQFCR_PID_DPT, tab);
948 	gfar_set_attribute(be16_to_cpu(value->psrc),
949 			   be16_to_cpu(mask->psrc),
950 			   RQFCR_PID_SPT, tab);
951 	gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
952 }
953 
954 /* Translates value and mask for RAW-IP4 */
955 static void gfar_set_user_ip(struct ethtool_usrip4_spec *value,
956 			     struct ethtool_usrip4_spec *mask,
957 			     struct filer_table *tab)
958 {
959 	gfar_set_attribute(be32_to_cpu(value->ip4src),
960 			   be32_to_cpu(mask->ip4src),
961 			   RQFCR_PID_SIA, tab);
962 	gfar_set_attribute(be32_to_cpu(value->ip4dst),
963 			   be32_to_cpu(mask->ip4dst),
964 			   RQFCR_PID_DIA, tab);
965 	gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
966 	gfar_set_attribute(value->proto, mask->proto, RQFCR_PID_L4P, tab);
967 	gfar_set_attribute(be32_to_cpu(value->l4_4_bytes),
968 			   be32_to_cpu(mask->l4_4_bytes),
969 			   RQFCR_PID_ARB, tab);
970 
971 }
972 
973 /* Translates value and mask for ETHER spec */
974 static void gfar_set_ether(struct ethhdr *value, struct ethhdr *mask,
975 			   struct filer_table *tab)
976 {
977 	u32 upper_temp_mask = 0;
978 	u32 lower_temp_mask = 0;
979 
980 	/* Source address */
981 	if (!is_broadcast_ether_addr(mask->h_source)) {
982 		if (is_zero_ether_addr(mask->h_source)) {
983 			upper_temp_mask = 0xFFFFFFFF;
984 			lower_temp_mask = 0xFFFFFFFF;
985 		} else {
986 			upper_temp_mask = mask->h_source[0] << 16 |
987 					  mask->h_source[1] << 8  |
988 					  mask->h_source[2];
989 			lower_temp_mask = mask->h_source[3] << 16 |
990 					  mask->h_source[4] << 8  |
991 					  mask->h_source[5];
992 		}
993 		/* Upper 24bit */
994 		gfar_set_attribute(value->h_source[0] << 16 |
995 				   value->h_source[1] << 8  |
996 				   value->h_source[2],
997 				   upper_temp_mask, RQFCR_PID_SAH, tab);
998 		/* And the same for the lower part */
999 		gfar_set_attribute(value->h_source[3] << 16 |
1000 				   value->h_source[4] << 8  |
1001 				   value->h_source[5],
1002 				   lower_temp_mask, RQFCR_PID_SAL, tab);
1003 	}
1004 	/* Destination address */
1005 	if (!is_broadcast_ether_addr(mask->h_dest)) {
1006 		/* Special for destination is limited broadcast */
1007 		if ((is_broadcast_ether_addr(value->h_dest) &&
1008 		    is_zero_ether_addr(mask->h_dest))) {
1009 			gfar_set_parse_bits(RQFPR_EBC, RQFPR_EBC, tab);
1010 		} else {
1011 			if (is_zero_ether_addr(mask->h_dest)) {
1012 				upper_temp_mask = 0xFFFFFFFF;
1013 				lower_temp_mask = 0xFFFFFFFF;
1014 			} else {
1015 				upper_temp_mask = mask->h_dest[0] << 16 |
1016 						  mask->h_dest[1] << 8  |
1017 						  mask->h_dest[2];
1018 				lower_temp_mask = mask->h_dest[3] << 16 |
1019 						  mask->h_dest[4] << 8  |
1020 						  mask->h_dest[5];
1021 			}
1022 
1023 			/* Upper 24bit */
1024 			gfar_set_attribute(value->h_dest[0] << 16 |
1025 					   value->h_dest[1] << 8  |
1026 					   value->h_dest[2],
1027 					   upper_temp_mask, RQFCR_PID_DAH, tab);
1028 			/* And the same for the lower part */
1029 			gfar_set_attribute(value->h_dest[3] << 16 |
1030 					   value->h_dest[4] << 8  |
1031 					   value->h_dest[5],
1032 					   lower_temp_mask, RQFCR_PID_DAL, tab);
1033 		}
1034 	}
1035 
1036 	gfar_set_attribute(be16_to_cpu(value->h_proto),
1037 			   be16_to_cpu(mask->h_proto),
1038 			   RQFCR_PID_ETY, tab);
1039 }
1040 
1041 static inline u32 vlan_tci_vid(struct ethtool_rx_flow_spec *rule)
1042 {
1043 	return be16_to_cpu(rule->h_ext.vlan_tci) & VLAN_VID_MASK;
1044 }
1045 
1046 static inline u32 vlan_tci_vidm(struct ethtool_rx_flow_spec *rule)
1047 {
1048 	return be16_to_cpu(rule->m_ext.vlan_tci) & VLAN_VID_MASK;
1049 }
1050 
1051 static inline u32 vlan_tci_cfi(struct ethtool_rx_flow_spec *rule)
1052 {
1053 	return be16_to_cpu(rule->h_ext.vlan_tci) & VLAN_CFI_MASK;
1054 }
1055 
1056 static inline u32 vlan_tci_cfim(struct ethtool_rx_flow_spec *rule)
1057 {
1058 	return be16_to_cpu(rule->m_ext.vlan_tci) & VLAN_CFI_MASK;
1059 }
1060 
1061 static inline u32 vlan_tci_prio(struct ethtool_rx_flow_spec *rule)
1062 {
1063 	return (be16_to_cpu(rule->h_ext.vlan_tci) & VLAN_PRIO_MASK) >>
1064 		VLAN_PRIO_SHIFT;
1065 }
1066 
1067 static inline u32 vlan_tci_priom(struct ethtool_rx_flow_spec *rule)
1068 {
1069 	return (be16_to_cpu(rule->m_ext.vlan_tci) & VLAN_PRIO_MASK) >>
1070 		VLAN_PRIO_SHIFT;
1071 }
1072 
1073 /* Convert a rule to binary filter format of gianfar */
1074 static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule,
1075 				 struct filer_table *tab)
1076 {
1077 	u32 vlan = 0, vlan_mask = 0;
1078 	u32 id = 0, id_mask = 0;
1079 	u32 cfi = 0, cfi_mask = 0;
1080 	u32 prio = 0, prio_mask = 0;
1081 	u32 old_index = tab->index;
1082 
1083 	/* Check if vlan is wanted */
1084 	if ((rule->flow_type & FLOW_EXT) &&
1085 	    (rule->m_ext.vlan_tci != cpu_to_be16(0xFFFF))) {
1086 		if (!rule->m_ext.vlan_tci)
1087 			rule->m_ext.vlan_tci = cpu_to_be16(0xFFFF);
1088 
1089 		vlan = RQFPR_VLN;
1090 		vlan_mask = RQFPR_VLN;
1091 
1092 		/* Separate the fields */
1093 		id = vlan_tci_vid(rule);
1094 		id_mask = vlan_tci_vidm(rule);
1095 		cfi = vlan_tci_cfi(rule);
1096 		cfi_mask = vlan_tci_cfim(rule);
1097 		prio = vlan_tci_prio(rule);
1098 		prio_mask = vlan_tci_priom(rule);
1099 
1100 		if (cfi_mask) {
1101 			if (cfi)
1102 				vlan |= RQFPR_CFI;
1103 			vlan_mask |= RQFPR_CFI;
1104 		}
1105 	}
1106 
1107 	switch (rule->flow_type & ~FLOW_EXT) {
1108 	case TCP_V4_FLOW:
1109 		gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_TCP | vlan,
1110 				    RQFPR_IPV4 | RQFPR_TCP | vlan_mask, tab);
1111 		gfar_set_basic_ip(&rule->h_u.tcp_ip4_spec,
1112 				  &rule->m_u.tcp_ip4_spec, tab);
1113 		break;
1114 	case UDP_V4_FLOW:
1115 		gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_UDP | vlan,
1116 				    RQFPR_IPV4 | RQFPR_UDP | vlan_mask, tab);
1117 		gfar_set_basic_ip(&rule->h_u.udp_ip4_spec,
1118 				  &rule->m_u.udp_ip4_spec, tab);
1119 		break;
1120 	case SCTP_V4_FLOW:
1121 		gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1122 				    tab);
1123 		gfar_set_attribute(132, 0, RQFCR_PID_L4P, tab);
1124 		gfar_set_basic_ip((struct ethtool_tcpip4_spec *)&rule->h_u,
1125 				  (struct ethtool_tcpip4_spec *)&rule->m_u,
1126 				  tab);
1127 		break;
1128 	case IP_USER_FLOW:
1129 		gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1130 				    tab);
1131 		gfar_set_user_ip((struct ethtool_usrip4_spec *) &rule->h_u,
1132 				 (struct ethtool_usrip4_spec *) &rule->m_u,
1133 				 tab);
1134 		break;
1135 	case ETHER_FLOW:
1136 		if (vlan)
1137 			gfar_set_parse_bits(vlan, vlan_mask, tab);
1138 		gfar_set_ether((struct ethhdr *) &rule->h_u,
1139 			       (struct ethhdr *) &rule->m_u, tab);
1140 		break;
1141 	default:
1142 		return -1;
1143 	}
1144 
1145 	/* Set the vlan attributes in the end */
1146 	if (vlan) {
1147 		gfar_set_attribute(id, id_mask, RQFCR_PID_VID, tab);
1148 		gfar_set_attribute(prio, prio_mask, RQFCR_PID_PRI, tab);
1149 	}
1150 
1151 	/* If there has been nothing written till now, it must be a default */
1152 	if (tab->index == old_index) {
1153 		gfar_set_mask(0xFFFFFFFF, tab);
1154 		tab->fe[tab->index].ctrl = 0x20;
1155 		tab->fe[tab->index].prop = 0x0;
1156 		tab->index++;
1157 	}
1158 
1159 	/* Remove last AND */
1160 	tab->fe[tab->index - 1].ctrl &= (~RQFCR_AND);
1161 
1162 	/* Specify which queue to use or to drop */
1163 	if (rule->ring_cookie == RX_CLS_FLOW_DISC)
1164 		tab->fe[tab->index - 1].ctrl |= RQFCR_RJE;
1165 	else
1166 		tab->fe[tab->index - 1].ctrl |= (rule->ring_cookie << 10);
1167 
1168 	/* Only big enough entries can be clustered */
1169 	if (tab->index > (old_index + 2)) {
1170 		tab->fe[old_index + 1].ctrl |= RQFCR_CLE;
1171 		tab->fe[tab->index - 1].ctrl |= RQFCR_CLE;
1172 	}
1173 
1174 	/* In rare cases the cache can be full while there is
1175 	 * free space in hw
1176 	 */
1177 	if (tab->index > MAX_FILER_CACHE_IDX - 1)
1178 		return -EBUSY;
1179 
1180 	return 0;
1181 }
1182 
1183 /* Write the bit-pattern from software's buffer to hardware registers */
1184 static int gfar_write_filer_table(struct gfar_private *priv,
1185 				  struct filer_table *tab)
1186 {
1187 	u32 i = 0;
1188 	if (tab->index > MAX_FILER_IDX - 1)
1189 		return -EBUSY;
1190 
1191 	/* Fill regular entries */
1192 	for (; i < MAX_FILER_IDX && (tab->fe[i].ctrl | tab->fe[i].prop); i++)
1193 		gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
1194 	/* Fill the rest with fall-troughs */
1195 	for (; i < MAX_FILER_IDX; i++)
1196 		gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
1197 	/* Last entry must be default accept
1198 	 * because that's what people expect
1199 	 */
1200 	gfar_write_filer(priv, i, 0x20, 0x0);
1201 
1202 	return 0;
1203 }
1204 
1205 static int gfar_check_capability(struct ethtool_rx_flow_spec *flow,
1206 				 struct gfar_private *priv)
1207 {
1208 
1209 	if (flow->flow_type & FLOW_EXT)	{
1210 		if (~flow->m_ext.data[0] || ~flow->m_ext.data[1])
1211 			netdev_warn(priv->ndev,
1212 				    "User-specific data not supported!\n");
1213 		if (~flow->m_ext.vlan_etype)
1214 			netdev_warn(priv->ndev,
1215 				    "VLAN-etype not supported!\n");
1216 	}
1217 	if (flow->flow_type == IP_USER_FLOW)
1218 		if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
1219 			netdev_warn(priv->ndev,
1220 				    "IP-Version differing from IPv4 not supported!\n");
1221 
1222 	return 0;
1223 }
1224 
1225 static int gfar_process_filer_changes(struct gfar_private *priv)
1226 {
1227 	struct ethtool_flow_spec_container *j;
1228 	struct filer_table *tab;
1229 	s32 ret = 0;
1230 
1231 	/* So index is set to zero, too! */
1232 	tab = kzalloc(sizeof(*tab), GFP_KERNEL);
1233 	if (tab == NULL)
1234 		return -ENOMEM;
1235 
1236 	/* Now convert the existing filer data from flow_spec into
1237 	 * filer tables binary format
1238 	 */
1239 	list_for_each_entry(j, &priv->rx_list.list, list) {
1240 		ret = gfar_convert_to_filer(&j->fs, tab);
1241 		if (ret == -EBUSY) {
1242 			netdev_err(priv->ndev,
1243 				   "Rule not added: No free space!\n");
1244 			goto end;
1245 		}
1246 		if (ret == -1) {
1247 			netdev_err(priv->ndev,
1248 				   "Rule not added: Unsupported Flow-type!\n");
1249 			goto end;
1250 		}
1251 	}
1252 
1253 	/* Write everything to hardware */
1254 	ret = gfar_write_filer_table(priv, tab);
1255 	if (ret == -EBUSY) {
1256 		netdev_err(priv->ndev, "Rule not added: No free space!\n");
1257 		goto end;
1258 	}
1259 
1260 end:
1261 	kfree(tab);
1262 	return ret;
1263 }
1264 
1265 static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow)
1266 {
1267 	u32 i = 0;
1268 
1269 	for (i = 0; i < sizeof(flow->m_u); i++)
1270 		flow->m_u.hdata[i] ^= 0xFF;
1271 
1272 	flow->m_ext.vlan_etype ^= cpu_to_be16(0xFFFF);
1273 	flow->m_ext.vlan_tci ^= cpu_to_be16(0xFFFF);
1274 	flow->m_ext.data[0] ^= cpu_to_be32(~0);
1275 	flow->m_ext.data[1] ^= cpu_to_be32(~0);
1276 }
1277 
1278 static int gfar_add_cls(struct gfar_private *priv,
1279 			struct ethtool_rx_flow_spec *flow)
1280 {
1281 	struct ethtool_flow_spec_container *temp, *comp;
1282 	int ret = 0;
1283 
1284 	temp = kmalloc(sizeof(*temp), GFP_KERNEL);
1285 	if (temp == NULL)
1286 		return -ENOMEM;
1287 	memcpy(&temp->fs, flow, sizeof(temp->fs));
1288 
1289 	gfar_invert_masks(&temp->fs);
1290 	ret = gfar_check_capability(&temp->fs, priv);
1291 	if (ret)
1292 		goto clean_mem;
1293 	/* Link in the new element at the right @location */
1294 	if (list_empty(&priv->rx_list.list)) {
1295 		ret = gfar_check_filer_hardware(priv);
1296 		if (ret != 0)
1297 			goto clean_mem;
1298 		list_add(&temp->list, &priv->rx_list.list);
1299 		goto process;
1300 	} else {
1301 		list_for_each_entry(comp, &priv->rx_list.list, list) {
1302 			if (comp->fs.location > flow->location) {
1303 				list_add_tail(&temp->list, &comp->list);
1304 				goto process;
1305 			}
1306 			if (comp->fs.location == flow->location) {
1307 				netdev_err(priv->ndev,
1308 					   "Rule not added: ID %d not free!\n",
1309 					   flow->location);
1310 				ret = -EBUSY;
1311 				goto clean_mem;
1312 			}
1313 		}
1314 		list_add_tail(&temp->list, &priv->rx_list.list);
1315 	}
1316 
1317 process:
1318 	priv->rx_list.count++;
1319 	ret = gfar_process_filer_changes(priv);
1320 	if (ret)
1321 		goto clean_list;
1322 	return ret;
1323 
1324 clean_list:
1325 	priv->rx_list.count--;
1326 	list_del(&temp->list);
1327 clean_mem:
1328 	kfree(temp);
1329 	return ret;
1330 }
1331 
1332 static int gfar_del_cls(struct gfar_private *priv, u32 loc)
1333 {
1334 	struct ethtool_flow_spec_container *comp;
1335 	u32 ret = -EINVAL;
1336 
1337 	if (list_empty(&priv->rx_list.list))
1338 		return ret;
1339 
1340 	list_for_each_entry(comp, &priv->rx_list.list, list) {
1341 		if (comp->fs.location == loc) {
1342 			list_del(&comp->list);
1343 			kfree(comp);
1344 			priv->rx_list.count--;
1345 			gfar_process_filer_changes(priv);
1346 			ret = 0;
1347 			break;
1348 		}
1349 	}
1350 
1351 	return ret;
1352 }
1353 
1354 static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
1355 {
1356 	struct ethtool_flow_spec_container *comp;
1357 	u32 ret = -EINVAL;
1358 
1359 	list_for_each_entry(comp, &priv->rx_list.list, list) {
1360 		if (comp->fs.location == cmd->fs.location) {
1361 			memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs));
1362 			gfar_invert_masks(&cmd->fs);
1363 			ret = 0;
1364 			break;
1365 		}
1366 	}
1367 
1368 	return ret;
1369 }
1370 
1371 static int gfar_get_cls_all(struct gfar_private *priv,
1372 			    struct ethtool_rxnfc *cmd, u32 *rule_locs)
1373 {
1374 	struct ethtool_flow_spec_container *comp;
1375 	u32 i = 0;
1376 
1377 	list_for_each_entry(comp, &priv->rx_list.list, list) {
1378 		if (i == cmd->rule_cnt)
1379 			return -EMSGSIZE;
1380 		rule_locs[i] = comp->fs.location;
1381 		i++;
1382 	}
1383 
1384 	cmd->data = MAX_FILER_IDX;
1385 	cmd->rule_cnt = i;
1386 
1387 	return 0;
1388 }
1389 
1390 static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
1391 {
1392 	struct gfar_private *priv = netdev_priv(dev);
1393 	int ret = 0;
1394 
1395 	if (test_bit(GFAR_RESETTING, &priv->state))
1396 		return -EBUSY;
1397 
1398 	mutex_lock(&priv->rx_queue_access);
1399 
1400 	switch (cmd->cmd) {
1401 	case ETHTOOL_SRXFH:
1402 		ret = gfar_set_hash_opts(priv, cmd);
1403 		break;
1404 	case ETHTOOL_SRXCLSRLINS:
1405 		if ((cmd->fs.ring_cookie != RX_CLS_FLOW_DISC &&
1406 		     cmd->fs.ring_cookie >= priv->num_rx_queues) ||
1407 		    cmd->fs.location >= MAX_FILER_IDX) {
1408 			ret = -EINVAL;
1409 			break;
1410 		}
1411 		ret = gfar_add_cls(priv, &cmd->fs);
1412 		break;
1413 	case ETHTOOL_SRXCLSRLDEL:
1414 		ret = gfar_del_cls(priv, cmd->fs.location);
1415 		break;
1416 	default:
1417 		ret = -EINVAL;
1418 	}
1419 
1420 	mutex_unlock(&priv->rx_queue_access);
1421 
1422 	return ret;
1423 }
1424 
1425 static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
1426 			u32 *rule_locs)
1427 {
1428 	struct gfar_private *priv = netdev_priv(dev);
1429 	int ret = 0;
1430 
1431 	switch (cmd->cmd) {
1432 	case ETHTOOL_GRXRINGS:
1433 		cmd->data = priv->num_rx_queues;
1434 		break;
1435 	case ETHTOOL_GRXCLSRLCNT:
1436 		cmd->rule_cnt = priv->rx_list.count;
1437 		break;
1438 	case ETHTOOL_GRXCLSRULE:
1439 		ret = gfar_get_cls(priv, cmd);
1440 		break;
1441 	case ETHTOOL_GRXCLSRLALL:
1442 		ret = gfar_get_cls_all(priv, cmd, rule_locs);
1443 		break;
1444 	default:
1445 		ret = -EINVAL;
1446 		break;
1447 	}
1448 
1449 	return ret;
1450 }
1451 
1452 static int gfar_get_ts_info(struct net_device *dev,
1453 			    struct kernel_ethtool_ts_info *info)
1454 {
1455 	struct gfar_private *priv = netdev_priv(dev);
1456 	struct platform_device *ptp_dev;
1457 	struct device_node *ptp_node;
1458 	struct ptp_qoriq *ptp = NULL;
1459 
1460 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) {
1461 		info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE;
1462 		return 0;
1463 	}
1464 
1465 	ptp_node = of_find_compatible_node(NULL, NULL, "fsl,etsec-ptp");
1466 	if (ptp_node) {
1467 		ptp_dev = of_find_device_by_node(ptp_node);
1468 		of_node_put(ptp_node);
1469 		if (ptp_dev)
1470 			ptp = platform_get_drvdata(ptp_dev);
1471 	}
1472 
1473 	if (ptp)
1474 		info->phc_index = ptp->phc_index;
1475 
1476 	info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
1477 				SOF_TIMESTAMPING_RX_HARDWARE |
1478 				SOF_TIMESTAMPING_RAW_HARDWARE |
1479 				SOF_TIMESTAMPING_TX_SOFTWARE;
1480 	info->tx_types = (1 << HWTSTAMP_TX_OFF) |
1481 			 (1 << HWTSTAMP_TX_ON);
1482 	info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
1483 			   (1 << HWTSTAMP_FILTER_ALL);
1484 	return 0;
1485 }
1486 
1487 const struct ethtool_ops gfar_ethtool_ops = {
1488 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
1489 				     ETHTOOL_COALESCE_MAX_FRAMES,
1490 	.get_drvinfo = gfar_gdrvinfo,
1491 	.get_regs_len = gfar_reglen,
1492 	.get_regs = gfar_get_regs,
1493 	.get_link = ethtool_op_get_link,
1494 	.get_coalesce = gfar_gcoalesce,
1495 	.set_coalesce = gfar_scoalesce,
1496 	.get_ringparam = gfar_gringparam,
1497 	.set_ringparam = gfar_sringparam,
1498 	.get_pauseparam = gfar_gpauseparam,
1499 	.set_pauseparam = gfar_spauseparam,
1500 	.get_strings = gfar_gstrings,
1501 	.get_sset_count = gfar_sset_count,
1502 	.get_ethtool_stats = gfar_fill_stats,
1503 	.get_msglevel = gfar_get_msglevel,
1504 	.set_msglevel = gfar_set_msglevel,
1505 #ifdef CONFIG_PM
1506 	.get_wol = gfar_get_wol,
1507 	.set_wol = gfar_set_wol,
1508 #endif
1509 	.set_rxnfc = gfar_set_nfc,
1510 	.get_rxnfc = gfar_get_nfc,
1511 	.get_ts_info = gfar_get_ts_info,
1512 	.get_link_ksettings = phy_ethtool_get_link_ksettings,
1513 	.set_link_ksettings = phy_ethtool_set_link_ksettings,
1514 };
1515