Free Electrons

Embedded Linux Experts

  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
890
891
892
893
894
895
896
897
898
899
900
901
902
903
/*
 * drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
 * Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
 * Copyright (c) 2015 Elad Raz <eladr@mellanox.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <linux/if_bridge.h>
#include <linux/workqueue.h>
#include <linux/jiffies.h>
#include <net/switchdev.h>

#include "spectrum.h"
#include "core.h"
#include "reg.h"

static int mlxsw_sp_port_attr_get(struct net_device *dev,
				  struct switchdev_attr *attr)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;

	switch (attr->id) {
	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
		attr->u.ppid.id_len = sizeof(mlxsw_sp->base_mac);
		memcpy(&attr->u.ppid.id, &mlxsw_sp->base_mac,
		       attr->u.ppid.id_len);
		break;
	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
		attr->u.brport_flags =
			(mlxsw_sp_port->learning ? BR_LEARNING : 0) |
			(mlxsw_sp_port->learning_sync ? BR_LEARNING_SYNC : 0) |
			(mlxsw_sp_port->uc_flood ? BR_FLOOD : 0);
		break;
	default:
		return -EOPNOTSUPP;
	}

	return 0;
}

static int mlxsw_sp_port_stp_state_set(struct mlxsw_sp_port *mlxsw_sp_port,
				       u8 state)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	enum mlxsw_reg_spms_state spms_state;
	char *spms_pl;
	u16 vid;
	int err;

	switch (state) {
	case BR_STATE_DISABLED: /* fall-through */
	case BR_STATE_FORWARDING:
		spms_state = MLXSW_REG_SPMS_STATE_FORWARDING;
		break;
	case BR_STATE_LISTENING: /* fall-through */
	case BR_STATE_LEARNING:
		spms_state = MLXSW_REG_SPMS_STATE_LEARNING;
		break;
	case BR_STATE_BLOCKING:
		spms_state = MLXSW_REG_SPMS_STATE_DISCARDING;
		break;
	default:
		BUG();
	}

	spms_pl = kmalloc(MLXSW_REG_SPMS_LEN, GFP_KERNEL);
	if (!spms_pl)
		return -ENOMEM;
	mlxsw_reg_spms_pack(spms_pl, mlxsw_sp_port->local_port);
	for_each_set_bit(vid, mlxsw_sp_port->active_vlans, VLAN_N_VID)
		mlxsw_reg_spms_vid_pack(spms_pl, vid, spms_state);

	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(spms), spms_pl);
	kfree(spms_pl);
	return err;
}

static int mlxsw_sp_port_attr_stp_state_set(struct mlxsw_sp_port *mlxsw_sp_port,
					    struct switchdev_trans *trans,
					    u8 state)
{
	if (switchdev_trans_ph_prepare(trans))
		return 0;

	mlxsw_sp_port->stp_state = state;
	return mlxsw_sp_port_stp_state_set(mlxsw_sp_port, state);
}

static int __mlxsw_sp_port_flood_set(struct mlxsw_sp_port *mlxsw_sp_port,
				     u16 fid_begin, u16 fid_end, bool set,
				     bool only_uc)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	u16 range = fid_end - fid_begin + 1;
	char *sftr_pl;
	int err;

	sftr_pl = kmalloc(MLXSW_REG_SFTR_LEN, GFP_KERNEL);
	if (!sftr_pl)
		return -ENOMEM;

	mlxsw_reg_sftr_pack(sftr_pl, MLXSW_SP_FLOOD_TABLE_UC, fid_begin,
			    MLXSW_REG_SFGC_TABLE_TYPE_FID_OFFEST, range,
			    mlxsw_sp_port->local_port, set);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sftr), sftr_pl);
	if (err)
		goto buffer_out;

	/* Flooding control allows one to decide whether a given port will
	 * flood unicast traffic for which there is no FDB entry.
	 */
	if (only_uc)
		goto buffer_out;

	mlxsw_reg_sftr_pack(sftr_pl, MLXSW_SP_FLOOD_TABLE_BM, fid_begin,
			    MLXSW_REG_SFGC_TABLE_TYPE_FID_OFFEST, range,
			    mlxsw_sp_port->local_port, set);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sftr), sftr_pl);

buffer_out:
	kfree(sftr_pl);
	return err;
}

static int mlxsw_sp_port_uc_flood_set(struct mlxsw_sp_port *mlxsw_sp_port,
				      bool set)
{
	struct net_device *dev = mlxsw_sp_port->dev;
	u16 vid, last_visited_vid;
	int err;

	for_each_set_bit(vid, mlxsw_sp_port->active_vlans, VLAN_N_VID) {
		err = __mlxsw_sp_port_flood_set(mlxsw_sp_port, vid, vid, set,
						true);
		if (err) {
			last_visited_vid = vid;
			goto err_port_flood_set;
		}
	}

	return 0;

err_port_flood_set:
	for_each_set_bit(vid, mlxsw_sp_port->active_vlans, last_visited_vid)
		__mlxsw_sp_port_flood_set(mlxsw_sp_port, vid, vid, !set, true);
	netdev_err(dev, "Failed to configure unicast flooding\n");
	return err;
}

static int mlxsw_sp_port_attr_br_flags_set(struct mlxsw_sp_port *mlxsw_sp_port,
					   struct switchdev_trans *trans,
					   unsigned long brport_flags)
{
	unsigned long uc_flood = mlxsw_sp_port->uc_flood ? BR_FLOOD : 0;
	bool set;
	int err;

	if (switchdev_trans_ph_prepare(trans))
		return 0;

	if ((uc_flood ^ brport_flags) & BR_FLOOD) {
		set = mlxsw_sp_port->uc_flood ? false : true;
		err = mlxsw_sp_port_uc_flood_set(mlxsw_sp_port, set);
		if (err)
			return err;
	}

	mlxsw_sp_port->uc_flood = brport_flags & BR_FLOOD ? 1 : 0;
	mlxsw_sp_port->learning = brport_flags & BR_LEARNING ? 1 : 0;
	mlxsw_sp_port->learning_sync = brport_flags & BR_LEARNING_SYNC ? 1 : 0;

	return 0;
}

static int mlxsw_sp_ageing_set(struct mlxsw_sp *mlxsw_sp, u32 ageing_time)
{
	char sfdat_pl[MLXSW_REG_SFDAT_LEN];
	int err;

	mlxsw_reg_sfdat_pack(sfdat_pl, ageing_time);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfdat), sfdat_pl);
	if (err)
		return err;
	mlxsw_sp->ageing_time = ageing_time;
	return 0;
}

static int mlxsw_sp_port_attr_br_ageing_set(struct mlxsw_sp_port *mlxsw_sp_port,
					    struct switchdev_trans *trans,
					    unsigned long ageing_clock_t)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
	u32 ageing_time = jiffies_to_msecs(ageing_jiffies) / 1000;

	if (switchdev_trans_ph_prepare(trans))
		return 0;

	return mlxsw_sp_ageing_set(mlxsw_sp, ageing_time);
}

static int mlxsw_sp_port_attr_set(struct net_device *dev,
				  const struct switchdev_attr *attr,
				  struct switchdev_trans *trans)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	int err = 0;

	switch (attr->id) {
	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
		err = mlxsw_sp_port_attr_stp_state_set(mlxsw_sp_port, trans,
						       attr->u.stp_state);
		break;
	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
		err = mlxsw_sp_port_attr_br_flags_set(mlxsw_sp_port, trans,
						      attr->u.brport_flags);
		break;
	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
		err = mlxsw_sp_port_attr_br_ageing_set(mlxsw_sp_port, trans,
						       attr->u.ageing_time);
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	return err;
}

static int mlxsw_sp_port_pvid_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	char spvid_pl[MLXSW_REG_SPVID_LEN];

	mlxsw_reg_spvid_pack(spvid_pl, mlxsw_sp_port->local_port, vid);
	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(spvid), spvid_pl);
}

static int mlxsw_sp_fid_create(struct mlxsw_sp *mlxsw_sp, u16 fid)
{
	char sfmr_pl[MLXSW_REG_SFMR_LEN];
	int err;

	mlxsw_reg_sfmr_pack(sfmr_pl, MLXSW_REG_SFMR_OP_CREATE_FID, fid, fid);
	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfmr), sfmr_pl);

	if (err)
		return err;

	set_bit(fid, mlxsw_sp->active_fids);
	return 0;
}

static void mlxsw_sp_fid_destroy(struct mlxsw_sp *mlxsw_sp, u16 fid)
{
	char sfmr_pl[MLXSW_REG_SFMR_LEN];

	clear_bit(fid, mlxsw_sp->active_fids);

	mlxsw_reg_sfmr_pack(sfmr_pl, MLXSW_REG_SFMR_OP_DESTROY_FID,
			    fid, fid);
	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfmr), sfmr_pl);
}

static int mlxsw_sp_port_fid_map(struct mlxsw_sp_port *mlxsw_sp_port, u16 fid)
{
	enum mlxsw_reg_svfa_mt mt;

	if (mlxsw_sp_port->nr_vfids)
		mt = MLXSW_REG_SVFA_MT_PORT_VID_TO_FID;
	else
		mt = MLXSW_REG_SVFA_MT_VID_TO_FID;

	return mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt, true, fid, fid);
}

static int mlxsw_sp_port_fid_unmap(struct mlxsw_sp_port *mlxsw_sp_port, u16 fid)
{
	enum mlxsw_reg_svfa_mt mt;

	if (!mlxsw_sp_port->nr_vfids)
		return 0;

	mt = MLXSW_REG_SVFA_MT_PORT_VID_TO_FID;
	return mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt, false, fid, fid);
}

static int mlxsw_sp_port_add_vids(struct net_device *dev, u16 vid_begin,
				  u16 vid_end)
{
	u16 vid;
	int err;

	for (vid = vid_begin; vid <= vid_end; vid++) {
		err = mlxsw_sp_port_add_vid(dev, 0, vid);
		if (err)
			goto err_port_add_vid;
	}
	return 0;

err_port_add_vid:
	for (vid--; vid >= vid_begin; vid--)
		mlxsw_sp_port_kill_vid(dev, 0, vid);
	return err;
}

static int __mlxsw_sp_port_vlans_add(struct mlxsw_sp_port *mlxsw_sp_port,
				     u16 vid_begin, u16 vid_end,
				     bool flag_untagged, bool flag_pvid)
{
	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
	struct net_device *dev = mlxsw_sp_port->dev;
	enum mlxsw_reg_svfa_mt mt;
	u16 vid, vid_e;
	int err;

	/* In case this is invoked with BRIDGE_FLAGS_SELF and port is
	 * not bridged, then packets ingressing through the port with
	 * the specified VIDs will be directed to CPU.
	 */
	if (!mlxsw_sp_port->bridged)
		return mlxsw_sp_port_add_vids(dev, vid_begin, vid_end);

	for (vid = vid_begin; vid <= vid_end; vid++) {
		if (!test_bit(vid, mlxsw_sp->active_fids)) {
			err = mlxsw_sp_fid_create(mlxsw_sp, vid);
			if (err) {
				netdev_err(dev, "Failed to create FID=%d\n",
					   vid);
				return err;
			}

			/* When creating a FID, we set a VID to FID mapping
			 * regardless of the port's mode.
			 */
			mt = MLXSW_REG_SVFA_MT_VID_TO_FID;
			err = mlxsw_sp_port_vid_to_fid_set(mlxsw_sp_port, mt,
							   true, vid, vid);
			if (err) {
				netdev_err(dev, "Failed to create FID=VID=%d mapping\n",
					   vid);
				return err;
			}
		}

		/* Set FID mapping according to port's mode */
		err = mlxsw_sp_port_fid_map(mlxsw_sp_port, vid);
		if (err) {
			netdev_err(dev, "Failed to map FID=%d", vid);
			return err;
		}
	}

	err = __mlxsw_sp_port_flood_set(mlxsw_sp_port, vid_begin, vid_end,
					true, false);
	if (err) {
		netdev_err(dev, "Failed to configure flooding\n");
		return err;
	}

	for (vid = vid_begin; vid <= vid_end;
	     vid += MLXSW_REG_SPVM_REC_MAX_COUNT) {
		vid_e = min((u16) (vid + MLXSW_REG_SPVM_REC_MAX_COUNT - 1),
			    vid_end);

		err = mlxsw_sp_port_vlan_set(mlxsw_sp_port, vid, vid_e, true,
					     flag_untagged);
		if (err) {
			netdev_err(mlxsw_sp_port->dev, "Unable to add VIDs %d-%d\n",
				   vid, vid_e);
			return err;
		}
	}

	vid = vid_begin;
	if (flag_pvid && mlxsw_sp_port->pvid != vid) {
		err = mlxsw_sp_port_pvid_set(mlxsw_sp_port, vid);
		if (err) {
			netdev_err(mlxsw_sp_port->dev, "Unable to add PVID %d\n",
				   vid);
			return err;
		}
		mlxsw_sp_port->pvid = vid;
	}

	/* Changing activity bits only if HW operation succeded */
	for (vid = vid_begin; vid <= vid_end; vid++)
		set_bit(vid, mlxsw_sp_port->active_vlans);

	return mlxsw_sp_port_stp_state_set(mlxsw_sp_port,
					   mlxsw_sp_port->stp_state);
}

static int mlxsw_sp_port_vlans_add(struct mlxsw_sp_port *mlxsw_sp_port,
				   const struct switchdev_obj_port_vlan *vlan,
				   struct switchdev_trans *trans)
{
	bool untagged_flag = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	bool pvid_flag = vlan->flags & BRIDGE_VLAN_INFO_PVID;

	if (switchdev_trans_ph_prepare(trans))
		return 0;

	return __mlxsw_sp_port_vlans_add(mlxsw_sp_port,
					 vlan->vid_begin, vlan->vid_end,
					 untagged_flag, pvid_flag);
}

static int mlxsw_sp_port_fdb_op(struct mlxsw_sp_port *mlxsw_sp_port,
				const char *mac, u16 vid, bool adding,
				bool dynamic)
{
	enum mlxsw_reg_sfd_rec_policy policy;
	enum mlxsw_reg_sfd_op op;
	char *sfd_pl;
	int err;

	if (!vid)
		vid = mlxsw_sp_port->pvid;

	sfd_pl = kmalloc(MLXSW_REG_SFD_LEN, GFP_KERNEL);
	if (!sfd_pl)
		return -ENOMEM;

	policy = dynamic ? MLXSW_REG_SFD_REC_POLICY_DYNAMIC_ENTRY_INGRESS :
			   MLXSW_REG_SFD_REC_POLICY_STATIC_ENTRY;
	op = adding ? MLXSW_REG_SFD_OP_WRITE_EDIT :
		      MLXSW_REG_SFD_OP_WRITE_REMOVE;
	mlxsw_reg_sfd_pack(sfd_pl, op, 0);
	mlxsw_reg_sfd_uc_pack(sfd_pl, 0, policy,
			      mac, vid, MLXSW_REG_SFD_REC_ACTION_NOP,
			      mlxsw_sp_port->local_port);
	err = mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core, MLXSW_REG(sfd),
			      sfd_pl);
	kfree(sfd_pl);

	return err;
}

static int
mlxsw_sp_port_fdb_static_add(struct mlxsw_sp_port *mlxsw_sp_port,
			     const struct switchdev_obj_port_fdb *fdb,
			     struct switchdev_trans *trans)
{
	if (switchdev_trans_ph_prepare(trans))
		return 0;

	return mlxsw_sp_port_fdb_op(mlxsw_sp_port, fdb->addr, fdb->vid,
				    true, false);
}

static int mlxsw_sp_port_obj_add(struct net_device *dev,
				 const struct switchdev_obj *obj,
				 struct switchdev_trans *trans)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	int err = 0;

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
		err = mlxsw_sp_port_vlans_add(mlxsw_sp_port,
					      SWITCHDEV_OBJ_PORT_VLAN(obj),
					      trans);
		break;
	case SWITCHDEV_OBJ_ID_PORT_FDB:
		err = mlxsw_sp_port_fdb_static_add(mlxsw_sp_port,
						   SWITCHDEV_OBJ_PORT_FDB(obj),
						   trans);
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	return err;
}

static int mlxsw_sp_port_kill_vids(struct net_device *dev, u16 vid_begin,
				   u16 vid_end)
{
	u16 vid;
	int err;

	for (vid = vid_begin; vid <= vid_end; vid++) {
		err = mlxsw_sp_port_kill_vid(dev, 0, vid);
		if (err)
			return err;
	}

	return 0;
}

static int __mlxsw_sp_port_vlans_del(struct mlxsw_sp_port *mlxsw_sp_port,
				     u16 vid_begin, u16 vid_end, bool init)
{
	struct net_device *dev = mlxsw_sp_port->dev;
	u16 vid, vid_e;
	int err;

	/* In case this is invoked with BRIDGE_FLAGS_SELF and port is
	 * not bridged, then prevent packets ingressing through the
	 * port with the specified VIDs from being trapped to CPU.
	 */
	if (!init && !mlxsw_sp_port->bridged)
		return mlxsw_sp_port_kill_vids(dev, vid_begin, vid_end);

	for (vid = vid_begin; vid <= vid_end;
	     vid += MLXSW_REG_SPVM_REC_MAX_COUNT) {
		vid_e = min((u16) (vid + MLXSW_REG_SPVM_REC_MAX_COUNT - 1),
			    vid_end);
		err = mlxsw_sp_port_vlan_set(mlxsw_sp_port, vid, vid_e, false,
					     false);
		if (err) {
			netdev_err(mlxsw_sp_port->dev, "Unable to del VIDs %d-%d\n",
				   vid, vid_e);
			return err;
		}
	}

	if ((mlxsw_sp_port->pvid >= vid_begin) &&
	    (mlxsw_sp_port->pvid <= vid_end)) {
		/* Default VLAN is always 1 */
		mlxsw_sp_port->pvid = 1;
		err = mlxsw_sp_port_pvid_set(mlxsw_sp_port,
					     mlxsw_sp_port->pvid);
		if (err) {
			netdev_err(mlxsw_sp_port->dev, "Unable to del PVID %d\n",
				   vid);
			return err;
		}
	}

	if (init)
		goto out;

	err = __mlxsw_sp_port_flood_set(mlxsw_sp_port, vid_begin, vid_end,
					false, false);
	if (err) {
		netdev_err(dev, "Failed to clear flooding\n");
		return err;
	}

	for (vid = vid_begin; vid <= vid_end; vid++) {
		/* Remove FID mapping in case of Virtual mode */
		err = mlxsw_sp_port_fid_unmap(mlxsw_sp_port, vid);
		if (err) {
			netdev_err(dev, "Failed to unmap FID=%d", vid);
			return err;
		}
	}

out:
	/* Changing activity bits only if HW operation succeded */
	for (vid = vid_begin; vid <= vid_end; vid++)
		clear_bit(vid, mlxsw_sp_port->active_vlans);

	return 0;
}

static int mlxsw_sp_port_vlans_del(struct mlxsw_sp_port *mlxsw_sp_port,
				   const struct switchdev_obj_port_vlan *vlan)
{
	return __mlxsw_sp_port_vlans_del(mlxsw_sp_port,
					 vlan->vid_begin, vlan->vid_end, false);
}

static int
mlxsw_sp_port_fdb_static_del(struct mlxsw_sp_port *mlxsw_sp_port,
			     const struct switchdev_obj_port_fdb *fdb)
{
	return mlxsw_sp_port_fdb_op(mlxsw_sp_port, fdb->addr, fdb->vid,
				    false, false);
}

static int mlxsw_sp_port_obj_del(struct net_device *dev,
				 const struct switchdev_obj *obj)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	int err = 0;

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
		err = mlxsw_sp_port_vlans_del(mlxsw_sp_port,
					      SWITCHDEV_OBJ_PORT_VLAN(obj));
		break;
	case SWITCHDEV_OBJ_ID_PORT_FDB:
		err = mlxsw_sp_port_fdb_static_del(mlxsw_sp_port,
						   SWITCHDEV_OBJ_PORT_FDB(obj));
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	return err;
}

static int mlxsw_sp_port_fdb_dump(struct mlxsw_sp_port *mlxsw_sp_port,
				  struct switchdev_obj_port_fdb *fdb,
				  switchdev_obj_dump_cb_t *cb)
{
	char *sfd_pl;
	char mac[ETH_ALEN];
	u16 vid;
	u8 local_port;
	u8 num_rec;
	int stored_err = 0;
	int i;
	int err;

	sfd_pl = kmalloc(MLXSW_REG_SFD_LEN, GFP_KERNEL);
	if (!sfd_pl)
		return -ENOMEM;

	mlxsw_reg_sfd_pack(sfd_pl, MLXSW_REG_SFD_OP_QUERY_DUMP, 0);
	do {
		mlxsw_reg_sfd_num_rec_set(sfd_pl, MLXSW_REG_SFD_REC_MAX_COUNT);
		err = mlxsw_reg_query(mlxsw_sp_port->mlxsw_sp->core,
				      MLXSW_REG(sfd), sfd_pl);
		if (err)
			goto out;

		num_rec = mlxsw_reg_sfd_num_rec_get(sfd_pl);

		/* Even in case of error, we have to run the dump to the end
		 * so the session in firmware is finished.
		 */
		if (stored_err)
			continue;

		for (i = 0; i < num_rec; i++) {
			switch (mlxsw_reg_sfd_rec_type_get(sfd_pl, i)) {
			case MLXSW_REG_SFD_REC_TYPE_UNICAST:
				mlxsw_reg_sfd_uc_unpack(sfd_pl, i, mac, &vid,
							&local_port);
				if (local_port == mlxsw_sp_port->local_port) {
					ether_addr_copy(fdb->addr, mac);
					fdb->ndm_state = NUD_REACHABLE;
					fdb->vid = vid;
					err = cb(&fdb->obj);
					if (err)
						stored_err = err;
				}
			}
		}
	} while (num_rec == MLXSW_REG_SFD_REC_MAX_COUNT);

out:
	kfree(sfd_pl);
	return stored_err ? stored_err : err;
}

static int mlxsw_sp_port_vlan_dump(struct mlxsw_sp_port *mlxsw_sp_port,
				   struct switchdev_obj_port_vlan *vlan,
				   switchdev_obj_dump_cb_t *cb)
{
	u16 vid;
	int err = 0;

	for_each_set_bit(vid, mlxsw_sp_port->active_vlans, VLAN_N_VID) {
		vlan->flags = 0;
		if (vid == mlxsw_sp_port->pvid)
			vlan->flags |= BRIDGE_VLAN_INFO_PVID;
		vlan->vid_begin = vid;
		vlan->vid_end = vid;
		err = cb(&vlan->obj);
		if (err)
			break;
	}
	return err;
}

static int mlxsw_sp_port_obj_dump(struct net_device *dev,
				  struct switchdev_obj *obj,
				  switchdev_obj_dump_cb_t *cb)
{
	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
	int err = 0;

	switch (obj->id) {
	case SWITCHDEV_OBJ_ID_PORT_VLAN:
		err = mlxsw_sp_port_vlan_dump(mlxsw_sp_port,
					      SWITCHDEV_OBJ_PORT_VLAN(obj), cb);
		break;
	case SWITCHDEV_OBJ_ID_PORT_FDB:
		err = mlxsw_sp_port_fdb_dump(mlxsw_sp_port,
					     SWITCHDEV_OBJ_PORT_FDB(obj), cb);
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	return err;
}

static const struct switchdev_ops mlxsw_sp_port_switchdev_ops = {
	.switchdev_port_attr_get	= mlxsw_sp_port_attr_get,
	.switchdev_port_attr_set	= mlxsw_sp_port_attr_set,
	.switchdev_port_obj_add		= mlxsw_sp_port_obj_add,
	.switchdev_port_obj_del		= mlxsw_sp_port_obj_del,
	.switchdev_port_obj_dump	= mlxsw_sp_port_obj_dump,
};

static void mlxsw_sp_fdb_notify_mac_process(struct mlxsw_sp *mlxsw_sp,
					    char *sfn_pl, int rec_index,
					    bool adding)
{
	struct mlxsw_sp_port *mlxsw_sp_port;
	char mac[ETH_ALEN];
	u8 local_port;
	u16 vid;
	int err;

	mlxsw_reg_sfn_mac_unpack(sfn_pl, rec_index, mac, &vid, &local_port);
	mlxsw_sp_port = mlxsw_sp->ports[local_port];
	if (!mlxsw_sp_port) {
		dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect local port in FDB notification\n");
		return;
	}

	err = mlxsw_sp_port_fdb_op(mlxsw_sp_port, mac, vid,
				   adding && mlxsw_sp_port->learning, true);
	if (err) {
		if (net_ratelimit())
			netdev_err(mlxsw_sp_port->dev, "Failed to set FDB entry\n");
		return;
	}

	if (mlxsw_sp_port->learning && mlxsw_sp_port->learning_sync) {
		struct switchdev_notifier_fdb_info info;
		unsigned long notifier_type;

		info.addr = mac;
		info.vid = vid;
		notifier_type = adding ? SWITCHDEV_FDB_ADD : SWITCHDEV_FDB_DEL;
		call_switchdev_notifiers(notifier_type, mlxsw_sp_port->dev,
					 &info.info);
	}
}

static void mlxsw_sp_fdb_notify_rec_process(struct mlxsw_sp *mlxsw_sp,
					    char *sfn_pl, int rec_index)
{
	switch (mlxsw_reg_sfn_rec_type_get(sfn_pl, rec_index)) {
	case MLXSW_REG_SFN_REC_TYPE_LEARNED_MAC:
		mlxsw_sp_fdb_notify_mac_process(mlxsw_sp, sfn_pl,
						rec_index, true);
		break;
	case MLXSW_REG_SFN_REC_TYPE_AGED_OUT_MAC:
		mlxsw_sp_fdb_notify_mac_process(mlxsw_sp, sfn_pl,
						rec_index, false);
		break;
	}
}

static void mlxsw_sp_fdb_notify_work_schedule(struct mlxsw_sp *mlxsw_sp)
{
	schedule_delayed_work(&mlxsw_sp->fdb_notify.dw,
			      msecs_to_jiffies(mlxsw_sp->fdb_notify.interval));
}

static void mlxsw_sp_fdb_notify_work(struct work_struct *work)
{
	struct mlxsw_sp *mlxsw_sp;
	char *sfn_pl;
	u8 num_rec;
	int i;
	int err;

	sfn_pl = kmalloc(MLXSW_REG_SFN_LEN, GFP_KERNEL);
	if (!sfn_pl)
		return;

	mlxsw_sp = container_of(work, struct mlxsw_sp, fdb_notify.dw.work);

	do {
		mlxsw_reg_sfn_pack(sfn_pl);
		err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(sfn), sfn_pl);
		if (err) {
			dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to get FDB notifications\n");
			break;
		}
		num_rec = mlxsw_reg_sfn_num_rec_get(sfn_pl);
		for (i = 0; i < num_rec; i++)
			mlxsw_sp_fdb_notify_rec_process(mlxsw_sp, sfn_pl, i);

	} while (num_rec);

	kfree(sfn_pl);
	mlxsw_sp_fdb_notify_work_schedule(mlxsw_sp);
}

static int mlxsw_sp_fdb_init(struct mlxsw_sp *mlxsw_sp)
{
	int err;

	err = mlxsw_sp_ageing_set(mlxsw_sp, MLXSW_SP_DEFAULT_AGEING_TIME);
	if (err) {
		dev_err(mlxsw_sp->bus_info->dev, "Failed to set default ageing time\n");
		return err;
	}
	INIT_DELAYED_WORK(&mlxsw_sp->fdb_notify.dw, mlxsw_sp_fdb_notify_work);
	mlxsw_sp->fdb_notify.interval = MLXSW_SP_DEFAULT_LEARNING_INTERVAL;
	mlxsw_sp_fdb_notify_work_schedule(mlxsw_sp);
	return 0;
}

static void mlxsw_sp_fdb_fini(struct mlxsw_sp *mlxsw_sp)
{
	cancel_delayed_work_sync(&mlxsw_sp->fdb_notify.dw);
}

static void mlxsw_sp_fids_fini(struct mlxsw_sp *mlxsw_sp)
{
	u16 fid;

	for_each_set_bit(fid, mlxsw_sp->active_fids, VLAN_N_VID)
		mlxsw_sp_fid_destroy(mlxsw_sp, fid);
}

int mlxsw_sp_switchdev_init(struct mlxsw_sp *mlxsw_sp)
{
	return mlxsw_sp_fdb_init(mlxsw_sp);
}

void mlxsw_sp_switchdev_fini(struct mlxsw_sp *mlxsw_sp)
{
	mlxsw_sp_fdb_fini(mlxsw_sp);
	mlxsw_sp_fids_fini(mlxsw_sp);
}

int mlxsw_sp_port_vlan_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
	struct net_device *dev = mlxsw_sp_port->dev;
	int err;

	/* Allow only untagged packets to ingress and tag them internally
	 * with VID 1.
	 */
	mlxsw_sp_port->pvid = 1;
	err = __mlxsw_sp_port_vlans_del(mlxsw_sp_port, 0, VLAN_N_VID, true);
	if (err) {
		netdev_err(dev, "Unable to init VLANs\n");
		return err;
	}

	/* Add implicit VLAN interface in the device, so that untagged
	 * packets will be classified to the default vFID.
	 */
	err = mlxsw_sp_port_add_vid(dev, 0, 1);
	if (err)
		netdev_err(dev, "Failed to configure default vFID\n");

	return err;
}

void mlxsw_sp_port_switchdev_init(struct mlxsw_sp_port *mlxsw_sp_port)
{
	mlxsw_sp_port->dev->switchdev_ops = &mlxsw_sp_port_switchdev_ops;
}

void mlxsw_sp_port_switchdev_fini(struct mlxsw_sp_port *mlxsw_sp_port)
{
}