summaryrefslogtreecommitdiff
path: root/drivers/staging/octeon/ethernet.c
blob: ef32dc1bbc802901566da71804a5001b8c709396 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
/**********************************************************************
 * Author: Cavium Networks
 *
 * Contact: support@caviumnetworks.com
 * This file is part of the OCTEON SDK
 *
 * Copyright (c) 2003-2007 Cavium Networks
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, Version 2, as
 * published by the Free Software Foundation.
 *
 * This file is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this file; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 * or visit http://www.gnu.org/licenses/.
 *
 * This file may also be available under a different license from Cavium.
 * Contact Cavium Networks for more information
**********************************************************************/
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/phy.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/of_net.h>

#include <net/dst.h>

#include <asm/octeon/octeon.h>

#include "ethernet-defines.h"
#include "octeon-ethernet.h"
#include "ethernet-mem.h"
#include "ethernet-rx.h"
#include "ethernet-tx.h"
#include "ethernet-mdio.h"
#include "ethernet-util.h"

#include <asm/octeon/cvmx-pip.h>
#include <asm/octeon/cvmx-pko.h>
#include <asm/octeon/cvmx-fau.h>
#include <asm/octeon/cvmx-ipd.h>
#include <asm/octeon/cvmx-helper.h>

#include <asm/octeon/cvmx-gmxx-defs.h>
#include <asm/octeon/cvmx-smix-defs.h>

#if defined(CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS) \
	&& CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS
int num_packet_buffers = CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS;
#else
int num_packet_buffers = 1024;
#endif
module_param(num_packet_buffers, int, 0444);
MODULE_PARM_DESC(num_packet_buffers, "\n"
	"\tNumber of packet buffers to allocate and store in the\n"
	"\tFPA. By default, 1024 packet buffers are used unless\n"
	"\tCONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS is defined.");

int pow_receive_group = 15;
module_param(pow_receive_group, int, 0444);
MODULE_PARM_DESC(pow_receive_group, "\n"
	"\tPOW group to receive packets from. All ethernet hardware\n"
	"\twill be configured to send incomming packets to this POW\n"
	"\tgroup. Also any other software can submit packets to this\n"
	"\tgroup for the kernel to process.");

int pow_send_group = -1;
module_param(pow_send_group, int, 0644);
MODULE_PARM_DESC(pow_send_group, "\n"
	"\tPOW group to send packets to other software on. This\n"
	"\tcontrols the creation of the virtual device pow0.\n"
	"\talways_use_pow also depends on this value.");

int always_use_pow;
module_param(always_use_pow, int, 0444);
MODULE_PARM_DESC(always_use_pow, "\n"
	"\tWhen set, always send to the pow group. This will cause\n"
	"\tpackets sent to real ethernet devices to be sent to the\n"
	"\tPOW group instead of the hardware. Unless some other\n"
	"\tapplication changes the config, packets will still be\n"
	"\treceived from the low level hardware. Use this option\n"
	"\tto allow a CVMX app to intercept all packets from the\n"
	"\tlinux kernel. You must specify pow_send_group along with\n"
	"\tthis option.");

char pow_send_list[128] = "";
module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
MODULE_PARM_DESC(pow_send_list, "\n"
	"\tComma separated list of ethernet devices that should use the\n"
	"\tPOW for transmit instead of the actual ethernet hardware. This\n"
	"\tis a per port version of always_use_pow. always_use_pow takes\n"
	"\tprecedence over this list. For example, setting this to\n"
	"\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n"
	"\tusing the pow_send_group.");

int max_rx_cpus = -1;
module_param(max_rx_cpus, int, 0444);
MODULE_PARM_DESC(max_rx_cpus, "\n"
	"\t\tThe maximum number of CPUs to use for packet reception.\n"
	"\t\tUse -1 to use all available CPUs.");

int rx_napi_weight = 32;
module_param(rx_napi_weight, int, 0444);
MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");

/**
 * cvm_oct_poll_queue - Workqueue for polling operations.
 */
struct workqueue_struct *cvm_oct_poll_queue;

/**
 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
 *
 * Set to one right before cvm_oct_poll_queue is destroyed.
 */
atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);

/**
 * Array of every ethernet device owned by this driver indexed by
 * the ipd input port number.
 */
struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];

u64 cvm_oct_tx_poll_interval;

static void cvm_oct_rx_refill_worker(struct work_struct *work);
static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);

static void cvm_oct_rx_refill_worker(struct work_struct *work)
{
	/*
	 * FPA 0 may have been drained, try to refill it if we need
	 * more than num_packet_buffers / 2, otherwise normal receive
	 * processing will refill it.  If it were drained, no packets
	 * could be received so cvm_oct_napi_poll would never be
	 * invoked to do the refill.
	 */
	cvm_oct_rx_refill_pool(num_packet_buffers / 2);

	if (!atomic_read(&cvm_oct_poll_queue_stopping))
		queue_delayed_work(cvm_oct_poll_queue,
				   &cvm_oct_rx_refill_work, HZ);
}

static void cvm_oct_periodic_worker(struct work_struct *work)
{
	struct octeon_ethernet *priv = container_of(work,
						    struct octeon_ethernet,
						    port_periodic_work.work);

	if (priv->poll)
		priv->poll(cvm_oct_device[priv->port]);

	cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(cvm_oct_device[priv->port]);

	if (!atomic_read(&cvm_oct_poll_queue_stopping))
		queue_delayed_work(cvm_oct_poll_queue, &priv->port_periodic_work, HZ);
 }

static void cvm_oct_configure_common_hw(void)
{
	/* Setup the FPA */
	cvmx_fpa_enable();
	cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
			     num_packet_buffers);
	cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
			     num_packet_buffers);
	if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
		cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
				     CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);

	if (USE_RED)
		cvmx_helper_setup_red(num_packet_buffers / 4,
				      num_packet_buffers / 8);

}

/**
 * cvm_oct_free_work- Free a work queue entry
 *
 * @work_queue_entry: Work queue entry to free
 *
 * Returns Zero on success, Negative on failure.
 */
int cvm_oct_free_work(void *work_queue_entry)
{
	cvmx_wqe_t *work = work_queue_entry;

	int segments = work->word2.s.bufs;
	union cvmx_buf_ptr segment_ptr = work->packet_ptr;

	while (segments--) {
		union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
			cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
		if (unlikely(!segment_ptr.s.i))
			cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
				      segment_ptr.s.pool,
				      DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE /
						     128));
		segment_ptr = next_ptr;
	}
	cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1));

	return 0;
}
EXPORT_SYMBOL(cvm_oct_free_work);

/**
 * cvm_oct_common_get_stats - get the low level ethernet statistics
 * @dev:    Device to get the statistics from
 *
 * Returns Pointer to the statistics
 */
static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
{
	cvmx_pip_port_status_t rx_status;
	cvmx_pko_port_status_t tx_status;
	struct octeon_ethernet *priv = netdev_priv(dev);

	if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
		if (octeon_is_simulation()) {
			/* The simulator doesn't support statistics */
			memset(&rx_status, 0, sizeof(rx_status));
			memset(&tx_status, 0, sizeof(tx_status));
		} else {
			cvmx_pip_get_port_status(priv->port, 1, &rx_status);
			cvmx_pko_get_port_status(priv->port, 1, &tx_status);
		}

		priv->stats.rx_packets += rx_status.inb_packets;
		priv->stats.tx_packets += tx_status.packets;
		priv->stats.rx_bytes += rx_status.inb_octets;
		priv->stats.tx_bytes += tx_status.octets;
		priv->stats.multicast += rx_status.multicast_packets;
		priv->stats.rx_crc_errors += rx_status.inb_errors;
		priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;

		/*
		 * The drop counter must be incremented atomically
		 * since the RX tasklet also increments it.
		 */
#ifdef CONFIG_64BIT
		atomic64_add(rx_status.dropped_packets,
			     (atomic64_t *)&priv->stats.rx_dropped);
#else
		atomic_add(rx_status.dropped_packets,
			     (atomic_t *)&priv->stats.rx_dropped);
#endif
	}

	return &priv->stats;
}

/**
 * cvm_oct_common_change_mtu - change the link MTU
 * @dev:     Device to change
 * @new_mtu: The new MTU
 *
 * Returns Zero on success
 */
static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
{
	struct octeon_ethernet *priv = netdev_priv(dev);
	int interface = INTERFACE(priv->port);
	int index = INDEX(priv->port);
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
	int vlan_bytes = 4;
#else
	int vlan_bytes = 0;
#endif

	/*
	 * Limit the MTU to make sure the ethernet packets are between
	 * 64 bytes and 65535 bytes.
	 */
	if ((new_mtu + 14 + 4 + vlan_bytes < 64)
	    || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
		pr_err("MTU must be between %d and %d.\n",
		       64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
		return -EINVAL;
	}
	dev->mtu = new_mtu;

	if ((interface < 2)
	    && (cvmx_helper_interface_get_mode(interface) !=
		CVMX_HELPER_INTERFACE_MODE_SPI)) {
		/* Add ethernet header and FCS, and VLAN if configured. */
		int max_packet = new_mtu + 14 + 4 + vlan_bytes;

		if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
		    || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
			/* Signal errors on packets larger than the MTU */
			cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
				       max_packet);
		} else {
			/*
			 * Set the hardware to truncate packets larger
			 * than the MTU and smaller the 64 bytes.
			 */
			union cvmx_pip_frm_len_chkx frm_len_chk;
			frm_len_chk.u64 = 0;
			frm_len_chk.s.minlen = 64;
			frm_len_chk.s.maxlen = max_packet;
			cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
				       frm_len_chk.u64);
		}
		/*
		 * Set the hardware to truncate packets larger than
		 * the MTU. The jabber register must be set to a
		 * multiple of 8 bytes, so round up.
		 */
		cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
			       (max_packet + 7) & ~7u);
	}
	return 0;
}

/**
 * cvm_oct_common_set_multicast_list - set the multicast list
 * @dev:    Device to work on
 */
static void cvm_oct_common_set_multicast_list(struct net_device *dev)
{
	union cvmx_gmxx_prtx_cfg gmx_cfg;
	struct octeon_ethernet *priv = netdev_priv(dev);
	int interface = INTERFACE(priv->port);
	int index = INDEX(priv->port);

	if ((interface < 2)
	    && (cvmx_helper_interface_get_mode(interface) !=
		CVMX_HELPER_INTERFACE_MODE_SPI)) {
		union cvmx_gmxx_rxx_adr_ctl control;
		control.u64 = 0;
		control.s.bcst = 1;	/* Allow broadcast MAC addresses */

		if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) ||
		    (dev->flags & IFF_PROMISC))
			/* Force accept multicast packets */
			control.s.mcst = 2;
		else
			/* Force reject multicast packets */
			control.s.mcst = 1;

		if (dev->flags & IFF_PROMISC)
			/*
			 * Reject matches if promisc. Since CAM is
			 * shut off, should accept everything.
			 */
			control.s.cam_mode = 0;
		else
			/* Filter packets based on the CAM */
			control.s.cam_mode = 1;

		gmx_cfg.u64 =
		    cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
		cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
			       gmx_cfg.u64 & ~1ull);

		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
			       control.u64);
		if (dev->flags & IFF_PROMISC)
			cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
				       (index, interface), 0);
		else
			cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
				       (index, interface), 1);

		cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
			       gmx_cfg.u64);
	}
}

/**
 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device
 * @dev:    The device in question.
 * @addr:   Address structure to change it too.

 * Returns Zero on success
 */
static int cvm_oct_set_mac_filter(struct net_device *dev)
{
	struct octeon_ethernet *priv = netdev_priv(dev);
	union cvmx_gmxx_prtx_cfg gmx_cfg;
	int interface = INTERFACE(priv->port);
	int index = INDEX(priv->port);

	if ((interface < 2)
	    && (cvmx_helper_interface_get_mode(interface) !=
		CVMX_HELPER_INTERFACE_MODE_SPI)) {
		int i;
		uint8_t *ptr = dev->dev_addr;
		uint64_t mac = 0;
		for (i = 0; i < 6; i++)
			mac = (mac << 8) | (uint64_t)ptr[i];

		gmx_cfg.u64 =
		    cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
		cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
			       gmx_cfg.u64 & ~1ull);

		cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
			       ptr[0]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
			       ptr[1]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
			       ptr[2]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
			       ptr[3]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
			       ptr[4]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
			       ptr[5]);
		cvm_oct_common_set_multicast_list(dev);
		cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
			       gmx_cfg.u64);
	}
	return 0;
}

static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
{
	int r = eth_mac_addr(dev, addr);

	if (r)
		return r;
	return cvm_oct_set_mac_filter(dev);
}

/**
 * cvm_oct_common_init - per network device initialization
 * @dev:    Device to initialize
 *
 * Returns Zero on success
 */
int cvm_oct_common_init(struct net_device *dev)
{
	struct octeon_ethernet *priv = netdev_priv(dev);
	const u8 *mac = NULL;

	if (priv->of_node)
		mac = of_get_mac_address(priv->of_node);

	if (mac && is_valid_ether_addr(mac)) {
		memcpy(dev->dev_addr, mac, ETH_ALEN);
		dev->addr_assign_type &= ~NET_ADDR_RANDOM;
	} else {
		eth_hw_addr_random(dev);
	}

	/*
	 * Force the interface to use the POW send if always_use_pow
	 * was specified or it is in the pow send list.
	 */
	if ((pow_send_group != -1)
	    && (always_use_pow || strstr(pow_send_list, dev->name)))
		priv->queue = -1;

	if (priv->queue != -1) {
		dev->features |= NETIF_F_SG;
		if (USE_HW_TCPUDP_CHECKSUM)
			dev->features |= NETIF_F_IP_CSUM;
	}

	/* We do our own locking, Linux doesn't need to */
	dev->features |= NETIF_F_LLTX;
	SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops);

	cvm_oct_phy_setup_device(dev);
	cvm_oct_set_mac_filter(dev);
	dev->netdev_ops->ndo_change_mtu(dev, dev->mtu);

	/*
	 * Zero out stats for port so we won't mistakenly show
	 * counters from the bootloader.
	 */
	memset(dev->netdev_ops->ndo_get_stats(dev), 0,
	       sizeof(struct net_device_stats));

	return 0;
}

void cvm_oct_common_uninit(struct net_device *dev)
{
	struct octeon_ethernet *priv = netdev_priv(dev);

	if (priv->phydev)
		phy_disconnect(priv->phydev);
}

static const struct net_device_ops cvm_oct_npi_netdev_ops = {
	.ndo_init		= cvm_oct_common_init,
	.ndo_uninit		= cvm_oct_common_uninit,
	.ndo_start_xmit		= cvm_oct_xmit,
	.ndo_set_rx_mode	= cvm_oct_common_set_multicast_list,
	.ndo_set_mac_address	= cvm_oct_common_set_mac_address,
	.ndo_do_ioctl		= cvm_oct_ioctl,
	.ndo_change_mtu		= cvm_oct_common_change_mtu,
	.ndo_get_stats		= cvm_oct_common_get_stats,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= cvm_oct_poll_controller,
#endif
};
static const struct net_device_ops cvm_oct_xaui_netdev_ops = {
	.ndo_init		= cvm_oct_xaui_init,
	.ndo_uninit		= cvm_oct_xaui_uninit,
	.ndo_open		= cvm_oct_xaui_open,
	.ndo_stop		= cvm_oct_xaui_stop,
	.ndo_start_xmit		= cvm_oct_xmit,
	.ndo_set_rx_mode	= cvm_oct_common_set_multicast_list,
	.ndo_set_mac_address	= cvm_oct_common_set_mac_address,
	.ndo_do_ioctl		= cvm_oct_ioctl,
	.ndo_change_mtu		= cvm_oct_common_change_mtu,
	.ndo_get_stats		= cvm_oct_common_get_stats,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= cvm_oct_poll_controller,
#endif
};
static const struct net_device_ops cvm_oct_sgmii_netdev_ops = {
	.ndo_init		= cvm_oct_sgmii_init,
	.ndo_uninit		= cvm_oct_sgmii_uninit,
	.ndo_open		= cvm_oct_sgmii_open,
	.ndo_stop		= cvm_oct_sgmii_stop,
	.ndo_start_xmit		= cvm_oct_xmit,
	.ndo_set_rx_mode	= cvm_oct_common_set_multicast_list,
	.ndo_set_mac_address	= cvm_oct_common_set_mac_address,
	.ndo_do_ioctl		= cvm_oct_ioctl,
	.ndo_change_mtu		= cvm_oct_common_change_mtu,
	.ndo_get_stats		= cvm_oct_common_get_stats,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= cvm_oct_poll_controller,
#endif
};
static const struct net_device_ops cvm_oct_spi_netdev_ops = {
	.ndo_init		= cvm_oct_spi_init,
	.ndo_uninit		= cvm_oct_spi_uninit,
	.ndo_start_xmit		= cvm_oct_xmit,
	.ndo_set_rx_mode	= cvm_oct_common_set_multicast_list,
	.ndo_set_mac_address	= cvm_oct_common_set_mac_address,
	.ndo_do_ioctl		= cvm_oct_ioctl,
	.ndo_change_mtu		= cvm_oct_common_change_mtu,
	.ndo_get_stats		= cvm_oct_common_get_stats,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= cvm_oct_poll_controller,
#endif
};
static const struct net_device_ops cvm_oct_rgmii_netdev_ops = {
	.ndo_init		= cvm_oct_rgmii_init,
	.ndo_uninit		= cvm_oct_rgmii_uninit,
	.ndo_open		= cvm_oct_rgmii_open,
	.ndo_stop		= cvm_oct_rgmii_stop,
	.ndo_start_xmit		= cvm_oct_xmit,
	.ndo_set_rx_mode	= cvm_oct_common_set_multicast_list,
	.ndo_set_mac_address	= cvm_oct_common_set_mac_address,
	.ndo_do_ioctl		= cvm_oct_ioctl,
	.ndo_change_mtu		= cvm_oct_common_change_mtu,
	.ndo_get_stats		= cvm_oct_common_get_stats,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= cvm_oct_poll_controller,
#endif
};
static const struct net_device_ops cvm_oct_pow_netdev_ops = {
	.ndo_init		= cvm_oct_common_init,
	.ndo_start_xmit		= cvm_oct_xmit_pow,
	.ndo_set_rx_mode	= cvm_oct_common_set_multicast_list,
	.ndo_set_mac_address	= cvm_oct_common_set_mac_address,
	.ndo_do_ioctl		= cvm_oct_ioctl,
	.ndo_change_mtu		= cvm_oct_common_change_mtu,
	.ndo_get_stats		= cvm_oct_common_get_stats,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= cvm_oct_poll_controller,
#endif
};

extern void octeon_mdiobus_force_mod_depencency(void);

static struct device_node *cvm_oct_of_get_child(const struct device_node *parent,
							   int reg_val)
{
	struct device_node *node = NULL;
	int size;
	const __be32 *addr;

	for (;;) {
		node = of_get_next_child(parent, node);
		if (!node)
			break;
		addr = of_get_property(node, "reg", &size);
		if (addr && (be32_to_cpu(*addr) == reg_val))
			break;
	}
	return node;
}

static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
							    int interface, int port)
{
	struct device_node *ni, *np;

	ni = cvm_oct_of_get_child(pip, interface);
	if (!ni)
		return NULL;

	np = cvm_oct_of_get_child(ni, port);
	of_node_put(ni);

	return np;
}

static int cvm_oct_probe(struct platform_device *pdev)
{
	int num_interfaces;
	int interface;
	int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
	int qos;
	struct device_node *pip;

	octeon_mdiobus_force_mod_depencency();
	pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);

	pip = pdev->dev.of_node;
	if (!pip) {
		pr_err("Error: No 'pip' in /aliases\n");
		return -EINVAL;
	}

	cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
	if (cvm_oct_poll_queue == NULL) {
		pr_err("octeon-ethernet: Cannot create workqueue");
		return -ENOMEM;
	}

	cvm_oct_configure_common_hw();

	cvmx_helper_initialize_packet_io_global();

	/* Change the input group for all ports before input is enabled */
	num_interfaces = cvmx_helper_get_number_of_interfaces();
	for (interface = 0; interface < num_interfaces; interface++) {
		int num_ports = cvmx_helper_ports_on_interface(interface);
		int port;

		for (port = cvmx_helper_get_ipd_port(interface, 0);
		     port < cvmx_helper_get_ipd_port(interface, num_ports);
		     port++) {
			union cvmx_pip_prt_tagx pip_prt_tagx;
			pip_prt_tagx.u64 =
			    cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
			pip_prt_tagx.s.grp = pow_receive_group;
			cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
				       pip_prt_tagx.u64);
		}
	}

	cvmx_helper_ipd_and_packet_input_enable();

	memset(cvm_oct_device, 0, sizeof(cvm_oct_device));

	/*
	 * Initialize the FAU used for counting packet buffers that
	 * need to be freed.
	 */
	cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);

	/* Initialize the FAU used for counting tx SKBs that need to be freed */
	cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);

	if ((pow_send_group != -1)) {
		struct net_device *dev;
		pr_info("\tConfiguring device for POW only access\n");
		dev = alloc_etherdev(sizeof(struct octeon_ethernet));
		if (dev) {
			/* Initialize the device private structure. */
			struct octeon_ethernet *priv = netdev_priv(dev);

			dev->netdev_ops = &cvm_oct_pow_netdev_ops;
			priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED;
			priv->port = CVMX_PIP_NUM_INPUT_PORTS;
			priv->queue = -1;
			strcpy(dev->name, "pow%d");
			for (qos = 0; qos < 16; qos++)
				skb_queue_head_init(&priv->tx_free_list[qos]);

			if (register_netdev(dev) < 0) {
				pr_err("Failed to register ethernet device for POW\n");
				free_netdev(dev);
			} else {
				cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev;
				pr_info("%s: POW send group %d, receive group %d\n",
					dev->name, pow_send_group,
					pow_receive_group);
			}
		} else {
			pr_err("Failed to allocate ethernet device for POW\n");
		}
	}

	num_interfaces = cvmx_helper_get_number_of_interfaces();
	for (interface = 0; interface < num_interfaces; interface++) {
		cvmx_helper_interface_mode_t imode =
		    cvmx_helper_interface_get_mode(interface);
		int num_ports = cvmx_helper_ports_on_interface(interface);
		int port;
		int port_index;

		for (port_index = 0, port = cvmx_helper_get_ipd_port(interface, 0);
		     port < cvmx_helper_get_ipd_port(interface, num_ports);
		     port_index++, port++) {
			struct octeon_ethernet *priv;
			struct net_device *dev =
			    alloc_etherdev(sizeof(struct octeon_ethernet));
			if (!dev) {
				pr_err("Failed to allocate ethernet device for port %d\n", port);
				continue;
			}

			/* Initialize the device private structure. */
			priv = netdev_priv(dev);
			priv->of_node = cvm_oct_node_for_port(pip, interface, port_index);

			INIT_DELAYED_WORK(&priv->port_periodic_work,
					  cvm_oct_periodic_worker);
			priv->imode = imode;
			priv->port = port;
			priv->queue = cvmx_pko_get_base_queue(priv->port);
			priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
			for (qos = 0; qos < 16; qos++)
				skb_queue_head_init(&priv->tx_free_list[qos]);
			for (qos = 0; qos < cvmx_pko_get_num_queues(port);
			     qos++)
				cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);

			switch (priv->imode) {

			/* These types don't support ports to IPD/PKO */
			case CVMX_HELPER_INTERFACE_MODE_DISABLED:
			case CVMX_HELPER_INTERFACE_MODE_PCIE:
			case CVMX_HELPER_INTERFACE_MODE_PICMG:
				break;

			case CVMX_HELPER_INTERFACE_MODE_NPI:
				dev->netdev_ops = &cvm_oct_npi_netdev_ops;
				strcpy(dev->name, "npi%d");
				break;

			case CVMX_HELPER_INTERFACE_MODE_XAUI:
				dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
				strcpy(dev->name, "xaui%d");
				break;

			case CVMX_HELPER_INTERFACE_MODE_LOOP:
				dev->netdev_ops = &cvm_oct_npi_netdev_ops;
				strcpy(dev->name, "loop%d");
				break;

			case CVMX_HELPER_INTERFACE_MODE_SGMII:
				dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
				strcpy(dev->name, "eth%d");
				break;

			case CVMX_HELPER_INTERFACE_MODE_SPI:
				dev->netdev_ops = &cvm_oct_spi_netdev_ops;
				strcpy(dev->name, "spi%d");
				break;

			case CVMX_HELPER_INTERFACE_MODE_RGMII:
			case CVMX_HELPER_INTERFACE_MODE_GMII:
				dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
				strcpy(dev->name, "eth%d");
				break;
			}

			if (!dev->netdev_ops) {
				free_netdev(dev);
			} else if (register_netdev(dev) < 0) {
				pr_err("Failed to register ethernet device "
					 "for interface %d, port %d\n",
					 interface, priv->port);
				free_netdev(dev);
			} else {
				cvm_oct_device[priv->port] = dev;
				fau -=
				    cvmx_pko_get_num_queues(priv->port) *
				    sizeof(uint32_t);
				queue_delayed_work(cvm_oct_poll_queue,
						   &priv->port_periodic_work, HZ);
			}
		}
	}

	cvm_oct_tx_initialize();
	cvm_oct_rx_initialize();

	/*
	 * 150 uS: about 10 1500-byte packtes at 1GE.
	 */
	cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);

	queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);

	return 0;
}

static int cvm_oct_remove(struct platform_device *pdev)
{
	int port;

	/* Disable POW interrupt */
	cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);

	cvmx_ipd_disable();

	/* Free the interrupt handler */
	free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);

	atomic_inc_return(&cvm_oct_poll_queue_stopping);
	cancel_delayed_work_sync(&cvm_oct_rx_refill_work);

	cvm_oct_rx_shutdown();
	cvm_oct_tx_shutdown();

	cvmx_pko_disable();

	/* Free the ethernet devices */
	for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
		if (cvm_oct_device[port]) {
			struct net_device *dev = cvm_oct_device[port];
			struct octeon_ethernet *priv = netdev_priv(dev);
			cancel_delayed_work_sync(&priv->port_periodic_work);

			cvm_oct_tx_shutdown_dev(dev);
			unregister_netdev(dev);
			free_netdev(dev);
			cvm_oct_device[port] = NULL;
		}
	}

	destroy_workqueue(cvm_oct_poll_queue);

	cvmx_pko_shutdown();

	cvmx_ipd_free_ptr();

	/* Free the HW pools */
	cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
			      num_packet_buffers);
	cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
			      num_packet_buffers);
	if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
		cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
				      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
	return 0;
}

static struct of_device_id cvm_oct_match[] = {
	{
		.compatible = "cavium,octeon-3860-pip",
	},
	{},
};
MODULE_DEVICE_TABLE(of, cvm_oct_match);

static struct platform_driver cvm_oct_driver = {
	.probe		= cvm_oct_probe,
	.remove		= cvm_oct_remove,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= KBUILD_MODNAME,
		.of_match_table = cvm_oct_match,
	},
};

module_platform_driver(cvm_oct_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");