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_platform.h>
42 #include <linux/fsl/ptp_qoriq.h>
43 
44 #include "gianfar.h"
45 
46 #define GFAR_MAX_COAL_USECS 0xffff
47 #define GFAR_MAX_COAL_FRAMES 0xff
48 
49 static const char stat_gstrings[][ETH_GSTRING_LEN] = {
50 	/* extra stats */
51 	"rx-allocation-errors",
52 	"rx-large-frame-errors",
53 	"rx-short-frame-errors",
54 	"rx-non-octet-errors",
55 	"rx-crc-errors",
56 	"rx-overrun-errors",
57 	"rx-busy-errors",
58 	"rx-babbling-errors",
59 	"rx-truncated-frames",
60 	"ethernet-bus-error",
61 	"tx-babbling-errors",
62 	"tx-underrun-errors",
63 	"tx-timeout-errors",
64 	/* rmon stats */
65 	"tx-rx-64-frames",
66 	"tx-rx-65-127-frames",
67 	"tx-rx-128-255-frames",
68 	"tx-rx-256-511-frames",
69 	"tx-rx-512-1023-frames",
70 	"tx-rx-1024-1518-frames",
71 	"tx-rx-1519-1522-good-vlan",
72 	"rx-bytes",
73 	"rx-packets",
74 	"rx-fcs-errors",
75 	"receive-multicast-packet",
76 	"receive-broadcast-packet",
77 	"rx-control-frame-packets",
78 	"rx-pause-frame-packets",
79 	"rx-unknown-op-code",
80 	"rx-alignment-error",
81 	"rx-frame-length-error",
82 	"rx-code-error",
83 	"rx-carrier-sense-error",
84 	"rx-undersize-packets",
85 	"rx-oversize-packets",
86 	"rx-fragmented-frames",
87 	"rx-jabber-frames",
88 	"rx-dropped-frames",
89 	"tx-byte-counter",
90 	"tx-packets",
91 	"tx-multicast-packets",
92 	"tx-broadcast-packets",
93 	"tx-pause-control-frames",
94 	"tx-deferral-packets",
95 	"tx-excessive-deferral-packets",
96 	"tx-single-collision-packets",
97 	"tx-multiple-collision-packets",
98 	"tx-late-collision-packets",
99 	"tx-excessive-collision-packets",
100 	"tx-total-collision",
101 	"reserved",
102 	"tx-dropped-frames",
103 	"tx-jabber-frames",
104 	"tx-fcs-errors",
105 	"tx-control-frames",
106 	"tx-oversize-frames",
107 	"tx-undersize-frames",
108 	"tx-fragmented-frames",
109 };
110 
111 /* Fill in a buffer with the strings which correspond to the
112  * stats */
113 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
114 {
115 	struct gfar_private *priv = netdev_priv(dev);
116 
117 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
118 		memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
119 	else
120 		memcpy(buf, stat_gstrings,
121 		       GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
122 }
123 
124 /* Fill in an array of 64-bit statistics from various sources.
125  * This array will be appended to the end of the ethtool_stats
126  * structure, and returned to user space
127  */
128 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
129 			    u64 *buf)
130 {
131 	int i;
132 	struct gfar_private *priv = netdev_priv(dev);
133 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
134 	atomic64_t *extra = (atomic64_t *)&priv->extra_stats;
135 
136 	for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++)
137 		buf[i] = atomic64_read(&extra[i]);
138 
139 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
140 		u32 __iomem *rmon = (u32 __iomem *) &regs->rmon;
141 
142 		for (; i < GFAR_STATS_LEN; i++, rmon++)
143 			buf[i] = (u64) gfar_read(rmon);
144 	}
145 }
146 
147 static int gfar_sset_count(struct net_device *dev, int sset)
148 {
149 	struct gfar_private *priv = netdev_priv(dev);
150 
151 	switch (sset) {
152 	case ETH_SS_STATS:
153 		if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON)
154 			return GFAR_STATS_LEN;
155 		else
156 			return GFAR_EXTRA_STATS_LEN;
157 	default:
158 		return -EOPNOTSUPP;
159 	}
160 }
161 
162 /* Fills in the drvinfo structure with some basic info */
163 static void gfar_gdrvinfo(struct net_device *dev,
164 			  struct ethtool_drvinfo *drvinfo)
165 {
166 	strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
167 }
168 
169 /* Return the length of the register structure */
170 static int gfar_reglen(struct net_device *dev)
171 {
172 	return sizeof (struct gfar);
173 }
174 
175 /* Return a dump of the GFAR register space */
176 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs,
177 			  void *regbuf)
178 {
179 	int i;
180 	struct gfar_private *priv = netdev_priv(dev);
181 	u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp[0].regs;
182 	u32 *buf = (u32 *) regbuf;
183 
184 	for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
185 		buf[i] = gfar_read(&theregs[i]);
186 }
187 
188 /* Convert microseconds to ethernet clock ticks, which changes
189  * depending on what speed the controller is running at */
190 static unsigned int gfar_usecs2ticks(struct gfar_private *priv,
191 				     unsigned int usecs)
192 {
193 	struct net_device *ndev = priv->ndev;
194 	struct phy_device *phydev = ndev->phydev;
195 	unsigned int count;
196 
197 	/* The timer is different, depending on the interface speed */
198 	switch (phydev->speed) {
199 	case SPEED_1000:
200 		count = GFAR_GBIT_TIME;
201 		break;
202 	case SPEED_100:
203 		count = GFAR_100_TIME;
204 		break;
205 	case SPEED_10:
206 	default:
207 		count = GFAR_10_TIME;
208 		break;
209 	}
210 
211 	/* Make sure we return a number greater than 0
212 	 * if usecs > 0 */
213 	return DIV_ROUND_UP(usecs * 1000, count);
214 }
215 
216 /* Convert ethernet clock ticks to microseconds */
217 static unsigned int gfar_ticks2usecs(struct gfar_private *priv,
218 				     unsigned int ticks)
219 {
220 	struct net_device *ndev = priv->ndev;
221 	struct phy_device *phydev = ndev->phydev;
222 	unsigned int count;
223 
224 	/* The timer is different, depending on the interface speed */
225 	switch (phydev->speed) {
226 	case SPEED_1000:
227 		count = GFAR_GBIT_TIME;
228 		break;
229 	case SPEED_100:
230 		count = GFAR_100_TIME;
231 		break;
232 	case SPEED_10:
233 	default:
234 		count = GFAR_10_TIME;
235 		break;
236 	}
237 
238 	/* Make sure we return a number greater than 0 */
239 	/* if ticks is > 0 */
240 	return (ticks * count) / 1000;
241 }
242 
243 /* Get the coalescing parameters, and put them in the cvals
244  * structure.  */
245 static int gfar_gcoalesce(struct net_device *dev,
246 			  struct ethtool_coalesce *cvals,
247 			  struct kernel_ethtool_coalesce *kernel_coal,
248 			  struct netlink_ext_ack *extack)
249 {
250 	struct gfar_private *priv = netdev_priv(dev);
251 	struct gfar_priv_rx_q *rx_queue = NULL;
252 	struct gfar_priv_tx_q *tx_queue = NULL;
253 	unsigned long rxtime;
254 	unsigned long rxcount;
255 	unsigned long txtime;
256 	unsigned long txcount;
257 
258 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
259 		return -EOPNOTSUPP;
260 
261 	if (!dev->phydev)
262 		return -ENODEV;
263 
264 	rx_queue = priv->rx_queue[0];
265 	tx_queue = priv->tx_queue[0];
266 
267 	rxtime  = get_ictt_value(rx_queue->rxic);
268 	rxcount = get_icft_value(rx_queue->rxic);
269 	txtime  = get_ictt_value(tx_queue->txic);
270 	txcount = get_icft_value(tx_queue->txic);
271 	cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, rxtime);
272 	cvals->rx_max_coalesced_frames = rxcount;
273 
274 	cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, txtime);
275 	cvals->tx_max_coalesced_frames = txcount;
276 
277 	return 0;
278 }
279 
280 /* Change the coalescing values.
281  * Both cvals->*_usecs and cvals->*_frames have to be > 0
282  * in order for coalescing to be active
283  */
284 static int gfar_scoalesce(struct net_device *dev,
285 			  struct ethtool_coalesce *cvals,
286 			  struct kernel_ethtool_coalesce *kernel_coal,
287 			  struct netlink_ext_ack *extack)
288 {
289 	struct gfar_private *priv = netdev_priv(dev);
290 	int i, err = 0;
291 
292 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE))
293 		return -EOPNOTSUPP;
294 
295 	if (!dev->phydev)
296 		return -ENODEV;
297 
298 	/* Check the bounds of the values */
299 	if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
300 		netdev_info(dev, "Coalescing is limited to %d microseconds\n",
301 			    GFAR_MAX_COAL_USECS);
302 		return -EINVAL;
303 	}
304 
305 	if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
306 		netdev_info(dev, "Coalescing is limited to %d frames\n",
307 			    GFAR_MAX_COAL_FRAMES);
308 		return -EINVAL;
309 	}
310 
311 	/* Check the bounds of the values */
312 	if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) {
313 		netdev_info(dev, "Coalescing is limited to %d microseconds\n",
314 			    GFAR_MAX_COAL_USECS);
315 		return -EINVAL;
316 	}
317 
318 	if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) {
319 		netdev_info(dev, "Coalescing is limited to %d frames\n",
320 			    GFAR_MAX_COAL_FRAMES);
321 		return -EINVAL;
322 	}
323 
324 	while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state))
325 		cpu_relax();
326 
327 	/* Set up rx coalescing */
328 	if ((cvals->rx_coalesce_usecs == 0) ||
329 	    (cvals->rx_max_coalesced_frames == 0)) {
330 		for (i = 0; i < priv->num_rx_queues; i++)
331 			priv->rx_queue[i]->rxcoalescing = 0;
332 	} else {
333 		for (i = 0; i < priv->num_rx_queues; i++)
334 			priv->rx_queue[i]->rxcoalescing = 1;
335 	}
336 
337 	for (i = 0; i < priv->num_rx_queues; i++) {
338 		priv->rx_queue[i]->rxic = mk_ic_value(
339 			cvals->rx_max_coalesced_frames,
340 			gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs));
341 	}
342 
343 	/* Set up tx coalescing */
344 	if ((cvals->tx_coalesce_usecs == 0) ||
345 	    (cvals->tx_max_coalesced_frames == 0)) {
346 		for (i = 0; i < priv->num_tx_queues; i++)
347 			priv->tx_queue[i]->txcoalescing = 0;
348 	} else {
349 		for (i = 0; i < priv->num_tx_queues; i++)
350 			priv->tx_queue[i]->txcoalescing = 1;
351 	}
352 
353 	for (i = 0; i < priv->num_tx_queues; i++) {
354 		priv->tx_queue[i]->txic = mk_ic_value(
355 			cvals->tx_max_coalesced_frames,
356 			gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs));
357 	}
358 
359 	if (dev->flags & IFF_UP) {
360 		stop_gfar(dev);
361 		err = startup_gfar(dev);
362 	} else {
363 		gfar_mac_reset(priv);
364 	}
365 
366 	clear_bit_unlock(GFAR_RESETTING, &priv->state);
367 
368 	return err;
369 }
370 
371 /* Fills in rvals with the current ring parameters.  Currently,
372  * rx, rx_mini, and rx_jumbo rings are the same size, as mini and
373  * jumbo are ignored by the driver */
374 static void gfar_gringparam(struct net_device *dev,
375 			    struct ethtool_ringparam *rvals,
376 			    struct kernel_ethtool_ringparam *kernel_rvals,
377 			    struct netlink_ext_ack *extack)
378 {
379 	struct gfar_private *priv = netdev_priv(dev);
380 	struct gfar_priv_tx_q *tx_queue = NULL;
381 	struct gfar_priv_rx_q *rx_queue = NULL;
382 
383 	tx_queue = priv->tx_queue[0];
384 	rx_queue = priv->rx_queue[0];
385 
386 	rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
387 	rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
388 	rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
389 	rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
390 
391 	/* Values changeable by the user.  The valid values are
392 	 * in the range 1 to the "*_max_pending" counterpart above.
393 	 */
394 	rvals->rx_pending = rx_queue->rx_ring_size;
395 	rvals->rx_mini_pending = rx_queue->rx_ring_size;
396 	rvals->rx_jumbo_pending = rx_queue->rx_ring_size;
397 	rvals->tx_pending = tx_queue->tx_ring_size;
398 }
399 
400 /* Change the current ring parameters, stopping the controller if
401  * necessary so that we don't mess things up while we're in motion.
402  */
403 static int gfar_sringparam(struct net_device *dev,
404 			   struct ethtool_ringparam *rvals,
405 			   struct kernel_ethtool_ringparam *kernel_rvals,
406 			   struct netlink_ext_ack *extack)
407 {
408 	struct gfar_private *priv = netdev_priv(dev);
409 	int err = 0, i;
410 
411 	if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
412 		return -EINVAL;
413 
414 	if (!is_power_of_2(rvals->rx_pending)) {
415 		netdev_err(dev, "Ring sizes must be a power of 2\n");
416 		return -EINVAL;
417 	}
418 
419 	if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
420 		return -EINVAL;
421 
422 	if (!is_power_of_2(rvals->tx_pending)) {
423 		netdev_err(dev, "Ring sizes must be a power of 2\n");
424 		return -EINVAL;
425 	}
426 
427 	while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state))
428 		cpu_relax();
429 
430 	if (dev->flags & IFF_UP)
431 		stop_gfar(dev);
432 
433 	/* Change the sizes */
434 	for (i = 0; i < priv->num_rx_queues; i++)
435 		priv->rx_queue[i]->rx_ring_size = rvals->rx_pending;
436 
437 	for (i = 0; i < priv->num_tx_queues; i++)
438 		priv->tx_queue[i]->tx_ring_size = rvals->tx_pending;
439 
440 	/* Rebuild the rings with the new size */
441 	if (dev->flags & IFF_UP)
442 		err = startup_gfar(dev);
443 
444 	clear_bit_unlock(GFAR_RESETTING, &priv->state);
445 
446 	return err;
447 }
448 
449 static void gfar_gpauseparam(struct net_device *dev,
450 			     struct ethtool_pauseparam *epause)
451 {
452 	struct gfar_private *priv = netdev_priv(dev);
453 
454 	epause->autoneg = !!priv->pause_aneg_en;
455 	epause->rx_pause = !!priv->rx_pause_en;
456 	epause->tx_pause = !!priv->tx_pause_en;
457 }
458 
459 static int gfar_spauseparam(struct net_device *dev,
460 			    struct ethtool_pauseparam *epause)
461 {
462 	struct gfar_private *priv = netdev_priv(dev);
463 	struct phy_device *phydev = dev->phydev;
464 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
465 
466 	if (!phydev)
467 		return -ENODEV;
468 
469 	if (!phy_validate_pause(phydev, epause))
470 		return -EINVAL;
471 
472 	priv->rx_pause_en = priv->tx_pause_en = 0;
473 	phy_set_asym_pause(phydev, epause->rx_pause, epause->tx_pause);
474 	if (epause->rx_pause) {
475 		priv->rx_pause_en = 1;
476 
477 		if (epause->tx_pause) {
478 			priv->tx_pause_en = 1;
479 		}
480 	} else if (epause->tx_pause) {
481 		priv->tx_pause_en = 1;
482 	}
483 
484 	if (epause->autoneg)
485 		priv->pause_aneg_en = 1;
486 	else
487 		priv->pause_aneg_en = 0;
488 
489 	if (!epause->autoneg) {
490 		u32 tempval = gfar_read(&regs->maccfg1);
491 
492 		tempval &= ~(MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
493 
494 		priv->tx_actual_en = 0;
495 		if (priv->tx_pause_en) {
496 			priv->tx_actual_en = 1;
497 			tempval |= MACCFG1_TX_FLOW;
498 		}
499 
500 		if (priv->rx_pause_en)
501 			tempval |= MACCFG1_RX_FLOW;
502 		gfar_write(&regs->maccfg1, tempval);
503 	}
504 
505 	return 0;
506 }
507 
508 int gfar_set_features(struct net_device *dev, netdev_features_t features)
509 {
510 	netdev_features_t changed = dev->features ^ features;
511 	struct gfar_private *priv = netdev_priv(dev);
512 	int err = 0;
513 
514 	if (!(changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
515 			 NETIF_F_RXCSUM)))
516 		return 0;
517 
518 	while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state))
519 		cpu_relax();
520 
521 	dev->features = features;
522 
523 	if (dev->flags & IFF_UP) {
524 		/* Now we take down the rings to rebuild them */
525 		stop_gfar(dev);
526 		err = startup_gfar(dev);
527 	} else {
528 		gfar_mac_reset(priv);
529 	}
530 
531 	clear_bit_unlock(GFAR_RESETTING, &priv->state);
532 
533 	return err;
534 }
535 
536 static uint32_t gfar_get_msglevel(struct net_device *dev)
537 {
538 	struct gfar_private *priv = netdev_priv(dev);
539 
540 	return priv->msg_enable;
541 }
542 
543 static void gfar_set_msglevel(struct net_device *dev, uint32_t data)
544 {
545 	struct gfar_private *priv = netdev_priv(dev);
546 
547 	priv->msg_enable = data;
548 }
549 
550 #ifdef CONFIG_PM
551 static void gfar_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
552 {
553 	struct gfar_private *priv = netdev_priv(dev);
554 
555 	wol->supported = 0;
556 	wol->wolopts = 0;
557 
558 	if (priv->wol_supported & GFAR_WOL_MAGIC)
559 		wol->supported |= WAKE_MAGIC;
560 
561 	if (priv->wol_supported & GFAR_WOL_FILER_UCAST)
562 		wol->supported |= WAKE_UCAST;
563 
564 	if (priv->wol_opts & GFAR_WOL_MAGIC)
565 		wol->wolopts |= WAKE_MAGIC;
566 
567 	if (priv->wol_opts & GFAR_WOL_FILER_UCAST)
568 		wol->wolopts |= WAKE_UCAST;
569 }
570 
571 static int gfar_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
572 {
573 	struct gfar_private *priv = netdev_priv(dev);
574 	u16 wol_opts = 0;
575 	int err;
576 
577 	if (!priv->wol_supported && wol->wolopts)
578 		return -EINVAL;
579 
580 	if (wol->wolopts & ~(WAKE_MAGIC | WAKE_UCAST))
581 		return -EINVAL;
582 
583 	if (wol->wolopts & WAKE_MAGIC) {
584 		wol_opts |= GFAR_WOL_MAGIC;
585 	} else {
586 		if (wol->wolopts & WAKE_UCAST)
587 			wol_opts |= GFAR_WOL_FILER_UCAST;
588 	}
589 
590 	wol_opts &= priv->wol_supported;
591 	priv->wol_opts = 0;
592 
593 	err = device_set_wakeup_enable(priv->dev, wol_opts);
594 	if (err)
595 		return err;
596 
597 	priv->wol_opts = wol_opts;
598 
599 	return 0;
600 }
601 #endif
602 
603 static void ethflow_to_filer_rules (struct gfar_private *priv, u64 ethflow)
604 {
605 	u32 fcr = 0x0, fpr = FPR_FILER_MASK;
606 
607 	if (ethflow & RXH_L2DA) {
608 		fcr = RQFCR_PID_DAH | RQFCR_CMP_NOMATCH |
609 		      RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0;
610 		priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
611 		priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
612 		gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
613 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
614 
615 		fcr = RQFCR_PID_DAL | RQFCR_CMP_NOMATCH |
616 		      RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0;
617 		priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
618 		priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
619 		gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
620 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
621 	}
622 
623 	if (ethflow & RXH_VLAN) {
624 		fcr = RQFCR_PID_VID | RQFCR_CMP_NOMATCH | RQFCR_HASH |
625 		      RQFCR_AND | RQFCR_HASHTBL_0;
626 		gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
627 		priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
628 		priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
629 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
630 	}
631 
632 	if (ethflow & RXH_IP_SRC) {
633 		fcr = RQFCR_PID_SIA | RQFCR_CMP_NOMATCH | RQFCR_HASH |
634 		      RQFCR_AND | RQFCR_HASHTBL_0;
635 		priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
636 		priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
637 		gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
638 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
639 	}
640 
641 	if (ethflow & (RXH_IP_DST)) {
642 		fcr = RQFCR_PID_DIA | RQFCR_CMP_NOMATCH | RQFCR_HASH |
643 		      RQFCR_AND | RQFCR_HASHTBL_0;
644 		priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
645 		priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
646 		gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
647 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
648 	}
649 
650 	if (ethflow & RXH_L3_PROTO) {
651 		fcr = RQFCR_PID_L4P | RQFCR_CMP_NOMATCH | RQFCR_HASH |
652 		      RQFCR_AND | RQFCR_HASHTBL_0;
653 		priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
654 		priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
655 		gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
656 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
657 	}
658 
659 	if (ethflow & RXH_L4_B_0_1) {
660 		fcr = RQFCR_PID_SPT | RQFCR_CMP_NOMATCH | RQFCR_HASH |
661 		      RQFCR_AND | RQFCR_HASHTBL_0;
662 		priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
663 		priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
664 		gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
665 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
666 	}
667 
668 	if (ethflow & RXH_L4_B_2_3) {
669 		fcr = RQFCR_PID_DPT | RQFCR_CMP_NOMATCH | RQFCR_HASH |
670 		      RQFCR_AND | RQFCR_HASHTBL_0;
671 		priv->ftp_rqfpr[priv->cur_filer_idx] = fpr;
672 		priv->ftp_rqfcr[priv->cur_filer_idx] = fcr;
673 		gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr);
674 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
675 	}
676 }
677 
678 static int gfar_ethflow_to_filer_table(struct gfar_private *priv, u64 ethflow,
679 				       u64 class)
680 {
681 	unsigned int cmp_rqfpr;
682 	unsigned int *local_rqfpr;
683 	unsigned int *local_rqfcr;
684 	int i = 0x0, k = 0x0;
685 	int j = MAX_FILER_IDX, l = 0x0;
686 	int ret = 1;
687 
688 	local_rqfpr = kmalloc_array(MAX_FILER_IDX + 1, sizeof(unsigned int),
689 				    GFP_KERNEL);
690 	local_rqfcr = kmalloc_array(MAX_FILER_IDX + 1, sizeof(unsigned int),
691 				    GFP_KERNEL);
692 	if (!local_rqfpr || !local_rqfcr) {
693 		ret = 0;
694 		goto err;
695 	}
696 
697 	switch (class) {
698 	case TCP_V4_FLOW:
699 		cmp_rqfpr = RQFPR_IPV4 |RQFPR_TCP;
700 		break;
701 	case UDP_V4_FLOW:
702 		cmp_rqfpr = RQFPR_IPV4 |RQFPR_UDP;
703 		break;
704 	case TCP_V6_FLOW:
705 		cmp_rqfpr = RQFPR_IPV6 |RQFPR_TCP;
706 		break;
707 	case UDP_V6_FLOW:
708 		cmp_rqfpr = RQFPR_IPV6 |RQFPR_UDP;
709 		break;
710 	default:
711 		netdev_err(priv->ndev,
712 			   "Right now this class is not supported\n");
713 		ret = 0;
714 		goto err;
715 	}
716 
717 	for (i = 0; i < MAX_FILER_IDX + 1; i++) {
718 		local_rqfpr[j] = priv->ftp_rqfpr[i];
719 		local_rqfcr[j] = priv->ftp_rqfcr[i];
720 		j--;
721 		if ((priv->ftp_rqfcr[i] ==
722 		     (RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND)) &&
723 		    (priv->ftp_rqfpr[i] == cmp_rqfpr))
724 			break;
725 	}
726 
727 	if (i == MAX_FILER_IDX + 1) {
728 		netdev_err(priv->ndev,
729 			   "No parse rule found, can't create hash rules\n");
730 		ret = 0;
731 		goto err;
732 	}
733 
734 	/* If a match was found, then it begins the starting of a cluster rule
735 	 * if it was already programmed, we need to overwrite these rules
736 	 */
737 	for (l = i+1; l < MAX_FILER_IDX; l++) {
738 		if ((priv->ftp_rqfcr[l] & RQFCR_CLE) &&
739 		    !(priv->ftp_rqfcr[l] & RQFCR_AND)) {
740 			priv->ftp_rqfcr[l] = RQFCR_CLE | RQFCR_CMP_EXACT |
741 					     RQFCR_HASHTBL_0 | RQFCR_PID_MASK;
742 			priv->ftp_rqfpr[l] = FPR_FILER_MASK;
743 			gfar_write_filer(priv, l, priv->ftp_rqfcr[l],
744 					 priv->ftp_rqfpr[l]);
745 			break;
746 		}
747 
748 		if (!(priv->ftp_rqfcr[l] & RQFCR_CLE) &&
749 			(priv->ftp_rqfcr[l] & RQFCR_AND))
750 			continue;
751 		else {
752 			local_rqfpr[j] = priv->ftp_rqfpr[l];
753 			local_rqfcr[j] = priv->ftp_rqfcr[l];
754 			j--;
755 		}
756 	}
757 
758 	priv->cur_filer_idx = l - 1;
759 
760 	/* hash rules */
761 	ethflow_to_filer_rules(priv, ethflow);
762 
763 	/* Write back the popped out rules again */
764 	for (k = j+1; k < MAX_FILER_IDX; k++) {
765 		priv->ftp_rqfpr[priv->cur_filer_idx] = local_rqfpr[k];
766 		priv->ftp_rqfcr[priv->cur_filer_idx] = local_rqfcr[k];
767 		gfar_write_filer(priv, priv->cur_filer_idx,
768 				 local_rqfcr[k], local_rqfpr[k]);
769 		if (!priv->cur_filer_idx)
770 			break;
771 		priv->cur_filer_idx = priv->cur_filer_idx - 1;
772 	}
773 
774 err:
775 	kfree(local_rqfcr);
776 	kfree(local_rqfpr);
777 	return ret;
778 }
779 
780 static int gfar_set_hash_opts(struct gfar_private *priv,
781 			      struct ethtool_rxnfc *cmd)
782 {
783 	/* write the filer rules here */
784 	if (!gfar_ethflow_to_filer_table(priv, cmd->data, cmd->flow_type))
785 		return -EINVAL;
786 
787 	return 0;
788 }
789 
790 static int gfar_check_filer_hardware(struct gfar_private *priv)
791 {
792 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
793 	u32 i;
794 
795 	/* Check if we are in FIFO mode */
796 	i = gfar_read(&regs->ecntrl);
797 	i &= ECNTRL_FIFM;
798 	if (i == ECNTRL_FIFM) {
799 		netdev_notice(priv->ndev, "Interface in FIFO mode\n");
800 		i = gfar_read(&regs->rctrl);
801 		i &= RCTRL_PRSDEP_MASK | RCTRL_PRSFM;
802 		if (i == (RCTRL_PRSDEP_MASK | RCTRL_PRSFM)) {
803 			netdev_info(priv->ndev,
804 				    "Receive Queue Filtering enabled\n");
805 		} else {
806 			netdev_warn(priv->ndev,
807 				    "Receive Queue Filtering disabled\n");
808 			return -EOPNOTSUPP;
809 		}
810 	}
811 	/* Or in standard mode */
812 	else {
813 		i = gfar_read(&regs->rctrl);
814 		i &= RCTRL_PRSDEP_MASK;
815 		if (i == RCTRL_PRSDEP_MASK) {
816 			netdev_info(priv->ndev,
817 				    "Receive Queue Filtering enabled\n");
818 		} else {
819 			netdev_warn(priv->ndev,
820 				    "Receive Queue Filtering disabled\n");
821 			return -EOPNOTSUPP;
822 		}
823 	}
824 
825 	/* Sets the properties for arbitrary filer rule
826 	 * to the first 4 Layer 4 Bytes
827 	 */
828 	gfar_write(&regs->rbifx, 0xC0C1C2C3);
829 	return 0;
830 }
831 
832 /* Write a mask to filer cache */
833 static void gfar_set_mask(u32 mask, struct filer_table *tab)
834 {
835 	tab->fe[tab->index].ctrl = RQFCR_AND | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
836 	tab->fe[tab->index].prop = mask;
837 	tab->index++;
838 }
839 
840 /* Sets parse bits (e.g. IP or TCP) */
841 static void gfar_set_parse_bits(u32 value, u32 mask, struct filer_table *tab)
842 {
843 	gfar_set_mask(mask, tab);
844 	tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_PID_PARSE |
845 				   RQFCR_AND;
846 	tab->fe[tab->index].prop = value;
847 	tab->index++;
848 }
849 
850 static void gfar_set_general_attribute(u32 value, u32 mask, u32 flag,
851 				       struct filer_table *tab)
852 {
853 	gfar_set_mask(mask, tab);
854 	tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_AND | flag;
855 	tab->fe[tab->index].prop = value;
856 	tab->index++;
857 }
858 
859 /* For setting a tuple of value and mask of type flag
860  * Example:
861  * IP-Src = 10.0.0.0/255.0.0.0
862  * value: 0x0A000000 mask: FF000000 flag: RQFPR_IPV4
863  *
864  * Ethtool gives us a value=0 and mask=~0 for don't care a tuple
865  * For a don't care mask it gives us a 0
866  *
867  * The check if don't care and the mask adjustment if mask=0 is done for VLAN
868  * and MAC stuff on an upper level (due to missing information on this level).
869  * For these guys we can discard them if they are value=0 and mask=0.
870  *
871  * Further the all masks are one-padded for better hardware efficiency.
872  */
873 static void gfar_set_attribute(u32 value, u32 mask, u32 flag,
874 			       struct filer_table *tab)
875 {
876 	switch (flag) {
877 		/* 3bit */
878 	case RQFCR_PID_PRI:
879 		if (!(value | mask))
880 			return;
881 		mask |= RQFCR_PID_PRI_MASK;
882 		break;
883 		/* 8bit */
884 	case RQFCR_PID_L4P:
885 	case RQFCR_PID_TOS:
886 		if (!~(mask | RQFCR_PID_L4P_MASK))
887 			return;
888 		if (!mask)
889 			mask = ~0;
890 		else
891 			mask |= RQFCR_PID_L4P_MASK;
892 		break;
893 		/* 12bit */
894 	case RQFCR_PID_VID:
895 		if (!(value | mask))
896 			return;
897 		mask |= RQFCR_PID_VID_MASK;
898 		break;
899 		/* 16bit */
900 	case RQFCR_PID_DPT:
901 	case RQFCR_PID_SPT:
902 	case RQFCR_PID_ETY:
903 		if (!~(mask | RQFCR_PID_PORT_MASK))
904 			return;
905 		if (!mask)
906 			mask = ~0;
907 		else
908 			mask |= RQFCR_PID_PORT_MASK;
909 		break;
910 		/* 24bit */
911 	case RQFCR_PID_DAH:
912 	case RQFCR_PID_DAL:
913 	case RQFCR_PID_SAH:
914 	case RQFCR_PID_SAL:
915 		if (!(value | mask))
916 			return;
917 		mask |= RQFCR_PID_MAC_MASK;
918 		break;
919 		/* for all real 32bit masks */
920 	default:
921 		if (!~mask)
922 			return;
923 		if (!mask)
924 			mask = ~0;
925 		break;
926 	}
927 	gfar_set_general_attribute(value, mask, flag, tab);
928 }
929 
930 /* Translates value and mask for UDP, TCP or SCTP */
931 static void gfar_set_basic_ip(struct ethtool_tcpip4_spec *value,
932 			      struct ethtool_tcpip4_spec *mask,
933 			      struct filer_table *tab)
934 {
935 	gfar_set_attribute(be32_to_cpu(value->ip4src),
936 			   be32_to_cpu(mask->ip4src),
937 			   RQFCR_PID_SIA, tab);
938 	gfar_set_attribute(be32_to_cpu(value->ip4dst),
939 			   be32_to_cpu(mask->ip4dst),
940 			   RQFCR_PID_DIA, tab);
941 	gfar_set_attribute(be16_to_cpu(value->pdst),
942 			   be16_to_cpu(mask->pdst),
943 			   RQFCR_PID_DPT, tab);
944 	gfar_set_attribute(be16_to_cpu(value->psrc),
945 			   be16_to_cpu(mask->psrc),
946 			   RQFCR_PID_SPT, tab);
947 	gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
948 }
949 
950 /* Translates value and mask for RAW-IP4 */
951 static void gfar_set_user_ip(struct ethtool_usrip4_spec *value,
952 			     struct ethtool_usrip4_spec *mask,
953 			     struct filer_table *tab)
954 {
955 	gfar_set_attribute(be32_to_cpu(value->ip4src),
956 			   be32_to_cpu(mask->ip4src),
957 			   RQFCR_PID_SIA, tab);
958 	gfar_set_attribute(be32_to_cpu(value->ip4dst),
959 			   be32_to_cpu(mask->ip4dst),
960 			   RQFCR_PID_DIA, tab);
961 	gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
962 	gfar_set_attribute(value->proto, mask->proto, RQFCR_PID_L4P, tab);
963 	gfar_set_attribute(be32_to_cpu(value->l4_4_bytes),
964 			   be32_to_cpu(mask->l4_4_bytes),
965 			   RQFCR_PID_ARB, tab);
966 
967 }
968 
969 /* Translates value and mask for ETHER spec */
970 static void gfar_set_ether(struct ethhdr *value, struct ethhdr *mask,
971 			   struct filer_table *tab)
972 {
973 	u32 upper_temp_mask = 0;
974 	u32 lower_temp_mask = 0;
975 
976 	/* Source address */
977 	if (!is_broadcast_ether_addr(mask->h_source)) {
978 		if (is_zero_ether_addr(mask->h_source)) {
979 			upper_temp_mask = 0xFFFFFFFF;
980 			lower_temp_mask = 0xFFFFFFFF;
981 		} else {
982 			upper_temp_mask = mask->h_source[0] << 16 |
983 					  mask->h_source[1] << 8  |
984 					  mask->h_source[2];
985 			lower_temp_mask = mask->h_source[3] << 16 |
986 					  mask->h_source[4] << 8  |
987 					  mask->h_source[5];
988 		}
989 		/* Upper 24bit */
990 		gfar_set_attribute(value->h_source[0] << 16 |
991 				   value->h_source[1] << 8  |
992 				   value->h_source[2],
993 				   upper_temp_mask, RQFCR_PID_SAH, tab);
994 		/* And the same for the lower part */
995 		gfar_set_attribute(value->h_source[3] << 16 |
996 				   value->h_source[4] << 8  |
997 				   value->h_source[5],
998 				   lower_temp_mask, RQFCR_PID_SAL, tab);
999 	}
1000 	/* Destination address */
1001 	if (!is_broadcast_ether_addr(mask->h_dest)) {
1002 		/* Special for destination is limited broadcast */
1003 		if ((is_broadcast_ether_addr(value->h_dest) &&
1004 		    is_zero_ether_addr(mask->h_dest))) {
1005 			gfar_set_parse_bits(RQFPR_EBC, RQFPR_EBC, tab);
1006 		} else {
1007 			if (is_zero_ether_addr(mask->h_dest)) {
1008 				upper_temp_mask = 0xFFFFFFFF;
1009 				lower_temp_mask = 0xFFFFFFFF;
1010 			} else {
1011 				upper_temp_mask = mask->h_dest[0] << 16 |
1012 						  mask->h_dest[1] << 8  |
1013 						  mask->h_dest[2];
1014 				lower_temp_mask = mask->h_dest[3] << 16 |
1015 						  mask->h_dest[4] << 8  |
1016 						  mask->h_dest[5];
1017 			}
1018 
1019 			/* Upper 24bit */
1020 			gfar_set_attribute(value->h_dest[0] << 16 |
1021 					   value->h_dest[1] << 8  |
1022 					   value->h_dest[2],
1023 					   upper_temp_mask, RQFCR_PID_DAH, tab);
1024 			/* And the same for the lower part */
1025 			gfar_set_attribute(value->h_dest[3] << 16 |
1026 					   value->h_dest[4] << 8  |
1027 					   value->h_dest[5],
1028 					   lower_temp_mask, RQFCR_PID_DAL, tab);
1029 		}
1030 	}
1031 
1032 	gfar_set_attribute(be16_to_cpu(value->h_proto),
1033 			   be16_to_cpu(mask->h_proto),
1034 			   RQFCR_PID_ETY, tab);
1035 }
1036 
1037 static inline u32 vlan_tci_vid(struct ethtool_rx_flow_spec *rule)
1038 {
1039 	return be16_to_cpu(rule->h_ext.vlan_tci) & VLAN_VID_MASK;
1040 }
1041 
1042 static inline u32 vlan_tci_vidm(struct ethtool_rx_flow_spec *rule)
1043 {
1044 	return be16_to_cpu(rule->m_ext.vlan_tci) & VLAN_VID_MASK;
1045 }
1046 
1047 static inline u32 vlan_tci_cfi(struct ethtool_rx_flow_spec *rule)
1048 {
1049 	return be16_to_cpu(rule->h_ext.vlan_tci) & VLAN_CFI_MASK;
1050 }
1051 
1052 static inline u32 vlan_tci_cfim(struct ethtool_rx_flow_spec *rule)
1053 {
1054 	return be16_to_cpu(rule->m_ext.vlan_tci) & VLAN_CFI_MASK;
1055 }
1056 
1057 static inline u32 vlan_tci_prio(struct ethtool_rx_flow_spec *rule)
1058 {
1059 	return (be16_to_cpu(rule->h_ext.vlan_tci) & VLAN_PRIO_MASK) >>
1060 		VLAN_PRIO_SHIFT;
1061 }
1062 
1063 static inline u32 vlan_tci_priom(struct ethtool_rx_flow_spec *rule)
1064 {
1065 	return (be16_to_cpu(rule->m_ext.vlan_tci) & VLAN_PRIO_MASK) >>
1066 		VLAN_PRIO_SHIFT;
1067 }
1068 
1069 /* Convert a rule to binary filter format of gianfar */
1070 static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule,
1071 				 struct filer_table *tab)
1072 {
1073 	u32 vlan = 0, vlan_mask = 0;
1074 	u32 id = 0, id_mask = 0;
1075 	u32 cfi = 0, cfi_mask = 0;
1076 	u32 prio = 0, prio_mask = 0;
1077 	u32 old_index = tab->index;
1078 
1079 	/* Check if vlan is wanted */
1080 	if ((rule->flow_type & FLOW_EXT) &&
1081 	    (rule->m_ext.vlan_tci != cpu_to_be16(0xFFFF))) {
1082 		if (!rule->m_ext.vlan_tci)
1083 			rule->m_ext.vlan_tci = cpu_to_be16(0xFFFF);
1084 
1085 		vlan = RQFPR_VLN;
1086 		vlan_mask = RQFPR_VLN;
1087 
1088 		/* Separate the fields */
1089 		id = vlan_tci_vid(rule);
1090 		id_mask = vlan_tci_vidm(rule);
1091 		cfi = vlan_tci_cfi(rule);
1092 		cfi_mask = vlan_tci_cfim(rule);
1093 		prio = vlan_tci_prio(rule);
1094 		prio_mask = vlan_tci_priom(rule);
1095 
1096 		if (cfi_mask) {
1097 			if (cfi)
1098 				vlan |= RQFPR_CFI;
1099 			vlan_mask |= RQFPR_CFI;
1100 		}
1101 	}
1102 
1103 	switch (rule->flow_type & ~FLOW_EXT) {
1104 	case TCP_V4_FLOW:
1105 		gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_TCP | vlan,
1106 				    RQFPR_IPV4 | RQFPR_TCP | vlan_mask, tab);
1107 		gfar_set_basic_ip(&rule->h_u.tcp_ip4_spec,
1108 				  &rule->m_u.tcp_ip4_spec, tab);
1109 		break;
1110 	case UDP_V4_FLOW:
1111 		gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_UDP | vlan,
1112 				    RQFPR_IPV4 | RQFPR_UDP | vlan_mask, tab);
1113 		gfar_set_basic_ip(&rule->h_u.udp_ip4_spec,
1114 				  &rule->m_u.udp_ip4_spec, tab);
1115 		break;
1116 	case SCTP_V4_FLOW:
1117 		gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1118 				    tab);
1119 		gfar_set_attribute(132, 0, RQFCR_PID_L4P, tab);
1120 		gfar_set_basic_ip((struct ethtool_tcpip4_spec *)&rule->h_u,
1121 				  (struct ethtool_tcpip4_spec *)&rule->m_u,
1122 				  tab);
1123 		break;
1124 	case IP_USER_FLOW:
1125 		gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1126 				    tab);
1127 		gfar_set_user_ip((struct ethtool_usrip4_spec *) &rule->h_u,
1128 				 (struct ethtool_usrip4_spec *) &rule->m_u,
1129 				 tab);
1130 		break;
1131 	case ETHER_FLOW:
1132 		if (vlan)
1133 			gfar_set_parse_bits(vlan, vlan_mask, tab);
1134 		gfar_set_ether((struct ethhdr *) &rule->h_u,
1135 			       (struct ethhdr *) &rule->m_u, tab);
1136 		break;
1137 	default:
1138 		return -1;
1139 	}
1140 
1141 	/* Set the vlan attributes in the end */
1142 	if (vlan) {
1143 		gfar_set_attribute(id, id_mask, RQFCR_PID_VID, tab);
1144 		gfar_set_attribute(prio, prio_mask, RQFCR_PID_PRI, tab);
1145 	}
1146 
1147 	/* If there has been nothing written till now, it must be a default */
1148 	if (tab->index == old_index) {
1149 		gfar_set_mask(0xFFFFFFFF, tab);
1150 		tab->fe[tab->index].ctrl = 0x20;
1151 		tab->fe[tab->index].prop = 0x0;
1152 		tab->index++;
1153 	}
1154 
1155 	/* Remove last AND */
1156 	tab->fe[tab->index - 1].ctrl &= (~RQFCR_AND);
1157 
1158 	/* Specify which queue to use or to drop */
1159 	if (rule->ring_cookie == RX_CLS_FLOW_DISC)
1160 		tab->fe[tab->index - 1].ctrl |= RQFCR_RJE;
1161 	else
1162 		tab->fe[tab->index - 1].ctrl |= (rule->ring_cookie << 10);
1163 
1164 	/* Only big enough entries can be clustered */
1165 	if (tab->index > (old_index + 2)) {
1166 		tab->fe[old_index + 1].ctrl |= RQFCR_CLE;
1167 		tab->fe[tab->index - 1].ctrl |= RQFCR_CLE;
1168 	}
1169 
1170 	/* In rare cases the cache can be full while there is
1171 	 * free space in hw
1172 	 */
1173 	if (tab->index > MAX_FILER_CACHE_IDX - 1)
1174 		return -EBUSY;
1175 
1176 	return 0;
1177 }
1178 
1179 /* Write the bit-pattern from software's buffer to hardware registers */
1180 static int gfar_write_filer_table(struct gfar_private *priv,
1181 				  struct filer_table *tab)
1182 {
1183 	u32 i = 0;
1184 	if (tab->index > MAX_FILER_IDX - 1)
1185 		return -EBUSY;
1186 
1187 	/* Fill regular entries */
1188 	for (; i < MAX_FILER_IDX && (tab->fe[i].ctrl | tab->fe[i].prop); i++)
1189 		gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
1190 	/* Fill the rest with fall-troughs */
1191 	for (; i < MAX_FILER_IDX; i++)
1192 		gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
1193 	/* Last entry must be default accept
1194 	 * because that's what people expect
1195 	 */
1196 	gfar_write_filer(priv, i, 0x20, 0x0);
1197 
1198 	return 0;
1199 }
1200 
1201 static int gfar_check_capability(struct ethtool_rx_flow_spec *flow,
1202 				 struct gfar_private *priv)
1203 {
1204 
1205 	if (flow->flow_type & FLOW_EXT)	{
1206 		if (~flow->m_ext.data[0] || ~flow->m_ext.data[1])
1207 			netdev_warn(priv->ndev,
1208 				    "User-specific data not supported!\n");
1209 		if (~flow->m_ext.vlan_etype)
1210 			netdev_warn(priv->ndev,
1211 				    "VLAN-etype not supported!\n");
1212 	}
1213 	if (flow->flow_type == IP_USER_FLOW)
1214 		if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
1215 			netdev_warn(priv->ndev,
1216 				    "IP-Version differing from IPv4 not supported!\n");
1217 
1218 	return 0;
1219 }
1220 
1221 static int gfar_process_filer_changes(struct gfar_private *priv)
1222 {
1223 	struct ethtool_flow_spec_container *j;
1224 	struct filer_table *tab;
1225 	s32 ret = 0;
1226 
1227 	/* So index is set to zero, too! */
1228 	tab = kzalloc(sizeof(*tab), GFP_KERNEL);
1229 	if (tab == NULL)
1230 		return -ENOMEM;
1231 
1232 	/* Now convert the existing filer data from flow_spec into
1233 	 * filer tables binary format
1234 	 */
1235 	list_for_each_entry(j, &priv->rx_list.list, list) {
1236 		ret = gfar_convert_to_filer(&j->fs, tab);
1237 		if (ret == -EBUSY) {
1238 			netdev_err(priv->ndev,
1239 				   "Rule not added: No free space!\n");
1240 			goto end;
1241 		}
1242 		if (ret == -1) {
1243 			netdev_err(priv->ndev,
1244 				   "Rule not added: Unsupported Flow-type!\n");
1245 			goto end;
1246 		}
1247 	}
1248 
1249 	/* Write everything to hardware */
1250 	ret = gfar_write_filer_table(priv, tab);
1251 	if (ret == -EBUSY) {
1252 		netdev_err(priv->ndev, "Rule not added: No free space!\n");
1253 		goto end;
1254 	}
1255 
1256 end:
1257 	kfree(tab);
1258 	return ret;
1259 }
1260 
1261 static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow)
1262 {
1263 	u32 i = 0;
1264 
1265 	for (i = 0; i < sizeof(flow->m_u); i++)
1266 		flow->m_u.hdata[i] ^= 0xFF;
1267 
1268 	flow->m_ext.vlan_etype ^= cpu_to_be16(0xFFFF);
1269 	flow->m_ext.vlan_tci ^= cpu_to_be16(0xFFFF);
1270 	flow->m_ext.data[0] ^= cpu_to_be32(~0);
1271 	flow->m_ext.data[1] ^= cpu_to_be32(~0);
1272 }
1273 
1274 static int gfar_add_cls(struct gfar_private *priv,
1275 			struct ethtool_rx_flow_spec *flow)
1276 {
1277 	struct ethtool_flow_spec_container *temp, *comp;
1278 	int ret = 0;
1279 
1280 	temp = kmalloc(sizeof(*temp), GFP_KERNEL);
1281 	if (temp == NULL)
1282 		return -ENOMEM;
1283 	memcpy(&temp->fs, flow, sizeof(temp->fs));
1284 
1285 	gfar_invert_masks(&temp->fs);
1286 	ret = gfar_check_capability(&temp->fs, priv);
1287 	if (ret)
1288 		goto clean_mem;
1289 	/* Link in the new element at the right @location */
1290 	if (list_empty(&priv->rx_list.list)) {
1291 		ret = gfar_check_filer_hardware(priv);
1292 		if (ret != 0)
1293 			goto clean_mem;
1294 		list_add(&temp->list, &priv->rx_list.list);
1295 		goto process;
1296 	} else {
1297 		list_for_each_entry(comp, &priv->rx_list.list, list) {
1298 			if (comp->fs.location > flow->location) {
1299 				list_add_tail(&temp->list, &comp->list);
1300 				goto process;
1301 			}
1302 			if (comp->fs.location == flow->location) {
1303 				netdev_err(priv->ndev,
1304 					   "Rule not added: ID %d not free!\n",
1305 					   flow->location);
1306 				ret = -EBUSY;
1307 				goto clean_mem;
1308 			}
1309 		}
1310 		list_add_tail(&temp->list, &priv->rx_list.list);
1311 	}
1312 
1313 process:
1314 	priv->rx_list.count++;
1315 	ret = gfar_process_filer_changes(priv);
1316 	if (ret)
1317 		goto clean_list;
1318 	return ret;
1319 
1320 clean_list:
1321 	priv->rx_list.count--;
1322 	list_del(&temp->list);
1323 clean_mem:
1324 	kfree(temp);
1325 	return ret;
1326 }
1327 
1328 static int gfar_del_cls(struct gfar_private *priv, u32 loc)
1329 {
1330 	struct ethtool_flow_spec_container *comp;
1331 	u32 ret = -EINVAL;
1332 
1333 	if (list_empty(&priv->rx_list.list))
1334 		return ret;
1335 
1336 	list_for_each_entry(comp, &priv->rx_list.list, list) {
1337 		if (comp->fs.location == loc) {
1338 			list_del(&comp->list);
1339 			kfree(comp);
1340 			priv->rx_list.count--;
1341 			gfar_process_filer_changes(priv);
1342 			ret = 0;
1343 			break;
1344 		}
1345 	}
1346 
1347 	return ret;
1348 }
1349 
1350 static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
1351 {
1352 	struct ethtool_flow_spec_container *comp;
1353 	u32 ret = -EINVAL;
1354 
1355 	list_for_each_entry(comp, &priv->rx_list.list, list) {
1356 		if (comp->fs.location == cmd->fs.location) {
1357 			memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs));
1358 			gfar_invert_masks(&cmd->fs);
1359 			ret = 0;
1360 			break;
1361 		}
1362 	}
1363 
1364 	return ret;
1365 }
1366 
1367 static int gfar_get_cls_all(struct gfar_private *priv,
1368 			    struct ethtool_rxnfc *cmd, u32 *rule_locs)
1369 {
1370 	struct ethtool_flow_spec_container *comp;
1371 	u32 i = 0;
1372 
1373 	list_for_each_entry(comp, &priv->rx_list.list, list) {
1374 		if (i == cmd->rule_cnt)
1375 			return -EMSGSIZE;
1376 		rule_locs[i] = comp->fs.location;
1377 		i++;
1378 	}
1379 
1380 	cmd->data = MAX_FILER_IDX;
1381 	cmd->rule_cnt = i;
1382 
1383 	return 0;
1384 }
1385 
1386 static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
1387 {
1388 	struct gfar_private *priv = netdev_priv(dev);
1389 	int ret = 0;
1390 
1391 	if (test_bit(GFAR_RESETTING, &priv->state))
1392 		return -EBUSY;
1393 
1394 	mutex_lock(&priv->rx_queue_access);
1395 
1396 	switch (cmd->cmd) {
1397 	case ETHTOOL_SRXFH:
1398 		ret = gfar_set_hash_opts(priv, cmd);
1399 		break;
1400 	case ETHTOOL_SRXCLSRLINS:
1401 		if ((cmd->fs.ring_cookie != RX_CLS_FLOW_DISC &&
1402 		     cmd->fs.ring_cookie >= priv->num_rx_queues) ||
1403 		    cmd->fs.location >= MAX_FILER_IDX) {
1404 			ret = -EINVAL;
1405 			break;
1406 		}
1407 		ret = gfar_add_cls(priv, &cmd->fs);
1408 		break;
1409 	case ETHTOOL_SRXCLSRLDEL:
1410 		ret = gfar_del_cls(priv, cmd->fs.location);
1411 		break;
1412 	default:
1413 		ret = -EINVAL;
1414 	}
1415 
1416 	mutex_unlock(&priv->rx_queue_access);
1417 
1418 	return ret;
1419 }
1420 
1421 static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
1422 			u32 *rule_locs)
1423 {
1424 	struct gfar_private *priv = netdev_priv(dev);
1425 	int ret = 0;
1426 
1427 	switch (cmd->cmd) {
1428 	case ETHTOOL_GRXRINGS:
1429 		cmd->data = priv->num_rx_queues;
1430 		break;
1431 	case ETHTOOL_GRXCLSRLCNT:
1432 		cmd->rule_cnt = priv->rx_list.count;
1433 		break;
1434 	case ETHTOOL_GRXCLSRULE:
1435 		ret = gfar_get_cls(priv, cmd);
1436 		break;
1437 	case ETHTOOL_GRXCLSRLALL:
1438 		ret = gfar_get_cls_all(priv, cmd, rule_locs);
1439 		break;
1440 	default:
1441 		ret = -EINVAL;
1442 		break;
1443 	}
1444 
1445 	return ret;
1446 }
1447 
1448 static int gfar_get_ts_info(struct net_device *dev,
1449 			    struct ethtool_ts_info *info)
1450 {
1451 	struct gfar_private *priv = netdev_priv(dev);
1452 	struct platform_device *ptp_dev;
1453 	struct device_node *ptp_node;
1454 	struct ptp_qoriq *ptp = NULL;
1455 
1456 	info->phc_index = -1;
1457 
1458 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) {
1459 		info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
1460 					SOF_TIMESTAMPING_SOFTWARE;
1461 		return 0;
1462 	}
1463 
1464 	ptp_node = of_find_compatible_node(NULL, NULL, "fsl,etsec-ptp");
1465 	if (ptp_node) {
1466 		ptp_dev = of_find_device_by_node(ptp_node);
1467 		of_node_put(ptp_node);
1468 		if (ptp_dev)
1469 			ptp = platform_get_drvdata(ptp_dev);
1470 	}
1471 
1472 	if (ptp)
1473 		info->phc_index = ptp->phc_index;
1474 
1475 	info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
1476 				SOF_TIMESTAMPING_RX_HARDWARE |
1477 				SOF_TIMESTAMPING_RAW_HARDWARE;
1478 	info->tx_types = (1 << HWTSTAMP_TX_OFF) |
1479 			 (1 << HWTSTAMP_TX_ON);
1480 	info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
1481 			   (1 << HWTSTAMP_FILTER_ALL);
1482 	return 0;
1483 }
1484 
1485 const struct ethtool_ops gfar_ethtool_ops = {
1486 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
1487 				     ETHTOOL_COALESCE_MAX_FRAMES,
1488 	.get_drvinfo = gfar_gdrvinfo,
1489 	.get_regs_len = gfar_reglen,
1490 	.get_regs = gfar_get_regs,
1491 	.get_link = ethtool_op_get_link,
1492 	.get_coalesce = gfar_gcoalesce,
1493 	.set_coalesce = gfar_scoalesce,
1494 	.get_ringparam = gfar_gringparam,
1495 	.set_ringparam = gfar_sringparam,
1496 	.get_pauseparam = gfar_gpauseparam,
1497 	.set_pauseparam = gfar_spauseparam,
1498 	.get_strings = gfar_gstrings,
1499 	.get_sset_count = gfar_sset_count,
1500 	.get_ethtool_stats = gfar_fill_stats,
1501 	.get_msglevel = gfar_get_msglevel,
1502 	.set_msglevel = gfar_set_msglevel,
1503 #ifdef CONFIG_PM
1504 	.get_wol = gfar_get_wol,
1505 	.set_wol = gfar_set_wol,
1506 #endif
1507 	.set_rxnfc = gfar_set_nfc,
1508 	.get_rxnfc = gfar_get_nfc,
1509 	.get_ts_info = gfar_get_ts_info,
1510 	.get_link_ksettings = phy_ethtool_get_link_ksettings,
1511 	.set_link_ksettings = phy_ethtool_set_link_ksettings,
1512 };
1513